diff options
39 files changed, 2749 insertions, 1466 deletions
diff --git a/fs/nfsd/acl.h b/fs/nfsd/acl.h index a986ceb6fd0d..4cd7c69a6cb9 100644 --- a/fs/nfsd/acl.h +++ b/fs/nfsd/acl.h @@ -47,7 +47,7 @@ struct svc_rqst; #define NFS4_ACL_MAX ((PAGE_SIZE - sizeof(struct nfs4_acl)) \ / sizeof(struct nfs4_ace)) -struct nfs4_acl *nfs4_acl_new(int); +int nfs4_acl_bytes(int entries); int nfs4_acl_get_whotype(char *, u32); __be32 nfs4_acl_write_who(struct xdr_stream *xdr, int who); diff --git a/fs/nfsd/auth.c b/fs/nfsd/auth.c index 72f44823adbb..9d46a0bdd9f9 100644 --- a/fs/nfsd/auth.c +++ b/fs/nfsd/auth.c @@ -28,7 +28,7 @@ int nfsd_setuser(struct svc_rqst *rqstp, struct svc_export *exp) validate_process_creds(); /* discard any old override before preparing the new set */ - revert_creds(get_cred(current->real_cred)); + revert_creds(get_cred(current_real_cred())); new = prepare_creds(); if (!new) return -ENOMEM; diff --git a/fs/nfsd/export.c b/fs/nfsd/export.c index 13b85f94d9e2..72ffd7cce3c3 100644 --- a/fs/nfsd/export.c +++ b/fs/nfsd/export.c @@ -698,8 +698,8 @@ static void svc_export_init(struct cache_head *cnew, struct cache_head *citem) kref_get(&item->ex_client->ref); new->ex_client = item->ex_client; - new->ex_path.dentry = dget(item->ex_path.dentry); - new->ex_path.mnt = mntget(item->ex_path.mnt); + new->ex_path = item->ex_path; + path_get(&item->ex_path); new->ex_fslocs.locations = NULL; new->ex_fslocs.locations_count = 0; new->ex_fslocs.migrated = 0; @@ -1253,7 +1253,7 @@ static int e_show(struct seq_file *m, void *p) return 0; } - cache_get(&exp->h); + exp_get(exp); if (cache_check(cd, &exp->h, NULL)) return 0; exp_put(exp); diff --git a/fs/nfsd/export.h b/fs/nfsd/export.h index cfeea85c5bed..04dc8c167b0c 100644 --- a/fs/nfsd/export.h +++ b/fs/nfsd/export.h @@ -101,9 +101,10 @@ static inline void exp_put(struct svc_export *exp) cache_put(&exp->h, exp->cd); } -static inline void exp_get(struct svc_export *exp) +static inline struct svc_export *exp_get(struct svc_export *exp) { cache_get(&exp->h); + return exp; } struct svc_export * rqst_exp_find(struct svc_rqst *, int, u32 *); diff --git a/fs/nfsd/fault_inject.c b/fs/nfsd/fault_inject.c index 2ed05c3cd43d..c16bf5af6831 100644 --- a/fs/nfsd/fault_inject.c +++ b/fs/nfsd/fault_inject.c @@ -17,81 +17,13 @@ struct nfsd_fault_inject_op { char *file; - u64 (*forget)(struct nfs4_client *, u64); - u64 (*print)(struct nfs4_client *, u64); + u64 (*get)(void); + u64 (*set_val)(u64); + u64 (*set_clnt)(struct sockaddr_storage *, size_t); }; -static struct nfsd_fault_inject_op inject_ops[] = { - { - .file = "forget_clients", - .forget = nfsd_forget_client, - .print = nfsd_print_client, - }, - { - .file = "forget_locks", - .forget = nfsd_forget_client_locks, - .print = nfsd_print_client_locks, - }, - { - .file = "forget_openowners", - .forget = nfsd_forget_client_openowners, - .print = nfsd_print_client_openowners, - }, - { - .file = "forget_delegations", - .forget = nfsd_forget_client_delegations, - .print = nfsd_print_client_delegations, - }, - { - .file = "recall_delegations", - .forget = nfsd_recall_client_delegations, - .print = nfsd_print_client_delegations, - }, -}; - -static long int NUM_INJECT_OPS = sizeof(inject_ops) / sizeof(struct nfsd_fault_inject_op); static struct dentry *debug_dir; -static void nfsd_inject_set(struct nfsd_fault_inject_op *op, u64 val) -{ - u64 count = 0; - - if (val == 0) - printk(KERN_INFO "NFSD Fault Injection: %s (all)", op->file); - else - printk(KERN_INFO "NFSD Fault Injection: %s (n = %llu)", op->file, val); - - nfs4_lock_state(); - count = nfsd_for_n_state(val, op->forget); - nfs4_unlock_state(); - printk(KERN_INFO "NFSD: %s: found %llu", op->file, count); -} - -static void nfsd_inject_set_client(struct nfsd_fault_inject_op *op, - struct sockaddr_storage *addr, - size_t addr_size) -{ - char buf[INET6_ADDRSTRLEN]; - struct nfs4_client *clp; - u64 count; - - nfs4_lock_state(); - clp = nfsd_find_client(addr, addr_size); - if (clp) { - count = op->forget(clp, 0); - rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); - printk(KERN_INFO "NFSD [%s]: Client %s had %llu state object(s)\n", op->file, buf, count); - } - nfs4_unlock_state(); -} - -static void nfsd_inject_get(struct nfsd_fault_inject_op *op, u64 *val) -{ - nfs4_lock_state(); - *val = nfsd_for_n_state(0, op->print); - nfs4_unlock_state(); -} - static ssize_t fault_inject_read(struct file *file, char __user *buf, size_t len, loff_t *ppos) { @@ -99,9 +31,10 @@ static ssize_t fault_inject_read(struct file *file, char __user *buf, char read_buf[25]; size_t size; loff_t pos = *ppos; + struct nfsd_fault_inject_op *op = file_inode(file)->i_private; if (!pos) - nfsd_inject_get(file_inode(file)->i_private, &val); + val = op->get(); size = scnprintf(read_buf, sizeof(read_buf), "%llu\n", val); return simple_read_from_buffer(buf, len, ppos, read_buf, size); @@ -114,18 +47,36 @@ static ssize_t fault_inject_write(struct file *file, const char __user *buf, size_t size = min(sizeof(write_buf) - 1, len); struct net *net = current->nsproxy->net_ns; struct sockaddr_storage sa; + struct nfsd_fault_inject_op *op = file_inode(file)->i_private; u64 val; + char *nl; if (copy_from_user(write_buf, buf, size)) return -EFAULT; write_buf[size] = '\0'; + /* Deal with any embedded newlines in the string */ + nl = strchr(write_buf, '\n'); + if (nl) { + size = nl - write_buf; + *nl = '\0'; + } + size = rpc_pton(net, write_buf, size, (struct sockaddr *)&sa, sizeof(sa)); - if (size > 0) - nfsd_inject_set_client(file_inode(file)->i_private, &sa, size); - else { + if (size > 0) { + val = op->set_clnt(&sa, size); + if (val) + pr_info("NFSD [%s]: Client %s had %llu state object(s)\n", + op->file, write_buf, val); + } else { val = simple_strtoll(write_buf, NULL, 0); - nfsd_inject_set(file_inode(file)->i_private, val); + if (val == 0) + pr_info("NFSD Fault Injection: %s (all)", op->file); + else + pr_info("NFSD Fault Injection: %s (n = %llu)", + op->file, val); + val = op->set_val(val); + pr_info("NFSD: %s: found %llu", op->file, val); } return len; /* on success, claim we got the whole input */ } @@ -141,6 +92,41 @@ void nfsd_fault_inject_cleanup(void) debugfs_remove_recursive(debug_dir); } +static struct nfsd_fault_inject_op inject_ops[] = { + { + .file = "forget_clients", + .get = nfsd_inject_print_clients, + .set_val = nfsd_inject_forget_clients, + .set_clnt = nfsd_inject_forget_client, + }, + { + .file = "forget_locks", + .get = nfsd_inject_print_locks, + .set_val = nfsd_inject_forget_locks, + .set_clnt = nfsd_inject_forget_client_locks, + }, + { + .file = "forget_openowners", + .get = nfsd_inject_print_openowners, + .set_val = nfsd_inject_forget_openowners, + .set_clnt = nfsd_inject_forget_client_openowners, + }, + { + .file = "forget_delegations", + .get = nfsd_inject_print_delegations, + .set_val = nfsd_inject_forget_delegations, + .set_clnt = nfsd_inject_forget_client_delegations, + }, + { + .file = "recall_delegations", + .get = nfsd_inject_print_delegations, + .set_val = nfsd_inject_recall_delegations, + .set_clnt = nfsd_inject_recall_client_delegations, + }, +}; + +#define NUM_INJECT_OPS (sizeof(inject_ops)/sizeof(struct nfsd_fault_inject_op)) + int nfsd_fault_inject_init(void) { unsigned int i; diff --git a/fs/nfsd/netns.h b/fs/nfsd/netns.h index d32b3aa6600d..ea6749a32760 100644 --- a/fs/nfsd/netns.h +++ b/fs/nfsd/netns.h @@ -29,14 +29,19 @@ #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) -#define LOCKOWNER_INO_HASH_BITS 8 -#define LOCKOWNER_INO_HASH_SIZE (1 << LOCKOWNER_INO_HASH_BITS) - #define SESSION_HASH_SIZE 512 struct cld_net; struct nfsd4_client_tracking_ops; +/* + * Represents a nfsd "container". With respect to nfsv4 state tracking, the + * fields of interest are the *_id_hashtbls and the *_name_tree. These track + * the nfs4_client objects by either short or long form clientid. + * + * Each nfsd_net runs a nfs4_laundromat workqueue job when necessary to clean + * up expired clients and delegations within the container. + */ struct nfsd_net { struct cld_net *cld_net; @@ -66,8 +71,6 @@ struct nfsd_net { struct rb_root conf_name_tree; struct list_head *unconf_id_hashtbl; struct rb_root unconf_name_tree; - struct list_head *ownerstr_hashtbl; - struct list_head *lockowner_ino_hashtbl; struct list_head *sessionid_hashtbl; /* * client_lru holds client queue ordered by nfs4_client.cl_time @@ -97,10 +100,16 @@ struct nfsd_net { bool nfsd_net_up; bool lockd_up; + /* Time of server startup */ + struct timeval nfssvc_boot; + /* - * Time of server startup + * Max number of connections this nfsd container will allow. Defaults + * to '0' which is means that it bases this on the number of threads. */ - struct timeval nfssvc_boot; + unsigned int max_connections; + + u32 clientid_counter; struct svc_serv *nfsd_serv; }; diff --git a/fs/nfsd/nfs2acl.c b/fs/nfsd/nfs2acl.c index 12b023a7ab7d..ac54ea60b3f6 100644 --- a/fs/nfsd/nfs2acl.c +++ b/fs/nfsd/nfs2acl.c @@ -54,14 +54,14 @@ static __be32 nfsacld_proc_getacl(struct svc_rqst * rqstp, if (resp->mask & (NFS_ACL|NFS_ACLCNT)) { acl = get_acl(inode, ACL_TYPE_ACCESS); - if (IS_ERR(acl)) { - nfserr = nfserrno(PTR_ERR(acl)); - goto fail; - } if (acl == NULL) { /* Solaris returns the inode's minimum ACL. */ acl = posix_acl_from_mode(inode->i_mode, GFP_KERNEL); } + if (IS_ERR(acl)) { + nfserr = nfserrno(PTR_ERR(acl)); + goto fail; + } resp->acl_access = acl; } if (resp->mask & (NFS_DFACL|NFS_DFACLCNT)) { diff --git a/fs/nfsd/nfs3acl.c b/fs/nfsd/nfs3acl.c index 2a514e21dc74..34cbbab6abd7 100644 --- a/fs/nfsd/nfs3acl.c +++ b/fs/nfsd/nfs3acl.c @@ -47,14 +47,14 @@ static __be32 nfsd3_proc_getacl(struct svc_rqst * rqstp, if (resp->mask & (NFS_ACL|NFS_ACLCNT)) { acl = get_acl(inode, ACL_TYPE_ACCESS); - if (IS_ERR(acl)) { - nfserr = nfserrno(PTR_ERR(acl)); - goto fail; - } if (acl == NULL) { /* Solaris returns the inode's minimum ACL. */ acl = posix_acl_from_mode(inode->i_mode, GFP_KERNEL); } + if (IS_ERR(acl)) { + nfserr = nfserrno(PTR_ERR(acl)); + goto fail; + } resp->acl_access = acl; } if (resp->mask & (NFS_DFACL|NFS_DFACLCNT)) { diff --git a/fs/nfsd/nfs3proc.c b/fs/nfsd/nfs3proc.c index 401289913130..fa2525b2e9d7 100644 --- a/fs/nfsd/nfs3proc.c +++ b/fs/nfsd/nfs3proc.c @@ -157,11 +157,7 @@ nfsd3_proc_read(struct svc_rqst *rqstp, struct nfsd3_readargs *argp, * 1 (status) + 22 (post_op_attr) + 1 (count) + 1 (eof) * + 1 (xdr opaque byte count) = 26 */ - - resp->count = argp->count; - if (max_blocksize < resp->count) - resp->count = max_blocksize; - + resp->count = min(argp->count, max_blocksize); svc_reserve_auth(rqstp, ((1 + NFS3_POST_OP_ATTR_WORDS + 3)<<2) + resp->count +4); fh_copy(&resp->fh, &argp->fh); @@ -286,8 +282,7 @@ nfsd3_proc_symlink(struct svc_rqst *rqstp, struct nfsd3_symlinkargs *argp, fh_copy(&resp->dirfh, &argp->ffh); fh_init(&resp->fh, NFS3_FHSIZE); nfserr = nfsd_symlink(rqstp, &resp->dirfh, argp->fname, argp->flen, - argp->tname, argp->tlen, - &resp->fh, &argp->attrs); + argp->tname, &resp->fh); RETURN_STATUS(nfserr); } diff --git a/fs/nfsd/nfs3xdr.c b/fs/nfsd/nfs3xdr.c index e6c01e80325e..39c5eb3ad33a 100644 --- a/fs/nfsd/nfs3xdr.c +++ b/fs/nfsd/nfs3xdr.c @@ -120,10 +120,7 @@ decode_sattr3(__be32 *p, struct iattr *iap) iap->ia_valid |= ATTR_SIZE; p = xdr_decode_hyper(p, &newsize); - if (newsize <= NFS_OFFSET_MAX) - iap->ia_size = newsize; - else - iap->ia_size = NFS_OFFSET_MAX; + iap->ia_size = min_t(u64, newsize, NFS_OFFSET_MAX); } if ((tmp = ntohl(*p++)) == 1) { /* set to server time */ iap->ia_valid |= ATTR_ATIME; @@ -338,10 +335,8 @@ nfs3svc_decode_readargs(struct svc_rqst *rqstp, __be32 *p, return 0; p = xdr_decode_hyper(p, &args->offset); - len = args->count = ntohl(*p++); - - if (len > max_blocksize) - len = max_blocksize; + args->count = ntohl(*p++); + len = min(args->count, max_blocksize); /* set up the kvec */ v=0; @@ -349,7 +344,7 @@ nfs3svc_decode_readargs(struct svc_rqst *rqstp, __be32 *p, struct page *p = *(rqstp->rq_next_page++); rqstp->rq_vec[v].iov_base = page_address(p); - rqstp->rq_vec[v].iov_len = len < PAGE_SIZE? len : PAGE_SIZE; + rqstp->rq_vec[v].iov_len = min_t(unsigned int, len, PAGE_SIZE); len -= rqstp->rq_vec[v].iov_len; v++; } @@ -484,9 +479,7 @@ nfs3svc_decode_symlinkargs(struct svc_rqst *rqstp, __be32 *p, } /* now copy next page if there is one */ if (len && !avail && rqstp->rq_arg.page_len) { - avail = rqstp->rq_arg.page_len; - if (avail > PAGE_SIZE) - avail = PAGE_SIZE; + avail = min_t(unsigned int, rqstp->rq_arg.page_len, PAGE_SIZE); old = page_address(rqstp->rq_arg.pages[0]); } while (len && avail && *old) { @@ -571,10 +564,7 @@ nfs3svc_decode_readdirargs(struct svc_rqst *rqstp, __be32 *p, args->verf = p; p += 2; args->dircount = ~0; args->count = ntohl(*p++); - - if (args->count > PAGE_SIZE) - args->count = PAGE_SIZE; - + args->count = min_t(u32, args->count, PAGE_SIZE); args->buffer = page_address(*(rqstp->rq_next_page++)); return xdr_argsize_check(rqstp, p); @@ -595,10 +585,7 @@ nfs3svc_decode_readdirplusargs(struct svc_rqst *rqstp, __be32 *p, args->dircount = ntohl(*p++); args->count = ntohl(*p++); - len = (args->count > max_blocksize) ? max_blocksize : - args->count; - args->count = len; - + len = args->count = min(args->count, max_blocksize); while (len > 0) { struct page *p = *(rqstp->rq_next_page++); if (!args->buffer) @@ -913,8 +900,7 @@ encode_entry(struct readdir_cd *ccd, const char *name, int namlen, */ /* truncate filename if too long */ - if (namlen > NFS3_MAXNAMLEN) - namlen = NFS3_MAXNAMLEN; + namlen = min(namlen, NFS3_MAXNAMLEN); slen = XDR_QUADLEN(namlen); elen = slen + NFS3_ENTRY_BAGGAGE diff --git a/fs/nfsd/nfs4acl.c b/fs/nfsd/nfs4acl.c index d714156a19fd..59fd76651781 100644 --- a/fs/nfsd/nfs4acl.c +++ b/fs/nfsd/nfs4acl.c @@ -146,35 +146,43 @@ nfsd4_get_nfs4_acl(struct svc_rqst *rqstp, struct dentry *dentry, int size = 0; pacl = get_acl(inode, ACL_TYPE_ACCESS); - if (!pacl) { + if (!pacl) pacl = posix_acl_from_mode(inode->i_mode, GFP_KERNEL); - if (IS_ERR(pacl)) - return PTR_ERR(pacl); - } + + if (IS_ERR(pacl)) + return PTR_ERR(pacl); + /* allocate for worst case: one (deny, allow) pair each: */ size += 2 * pacl->a_count; if (S_ISDIR(inode->i_mode)) { flags = NFS4_ACL_DIR; dpacl = get_acl(inode, ACL_TYPE_DEFAULT); + if (IS_ERR(dpacl)) { + error = PTR_ERR(dpacl); + goto rel_pacl; + } + if (dpacl) size += 2 * dpacl->a_count; } - *acl = nfs4_acl_new(size); + *acl = kmalloc(nfs4_acl_bytes(size), GFP_KERNEL); if (*acl == NULL) { error = -ENOMEM; goto out; } + (*acl)->naces = 0; _posix_to_nfsv4_one(pacl, *acl, flags & ~NFS4_ACL_TYPE_DEFAULT); if (dpacl) _posix_to_nfsv4_one(dpacl, *acl, flags | NFS4_ACL_TYPE_DEFAULT); - out: - posix_acl_release(pacl); +out: posix_acl_release(dpacl); +rel_pacl: + posix_acl_release(pacl); return error; } @@ -872,16 +880,13 @@ ace2type(struct nfs4_ace *ace) return -1; } -struct nfs4_acl * -nfs4_acl_new(int n) +/* + * return the size of the struct nfs4_acl required to represent an acl + * with @entries entries. + */ +int nfs4_acl_bytes(int entries) { - struct nfs4_acl *acl; - - acl = kmalloc(sizeof(*acl) + n*sizeof(struct nfs4_ace), GFP_KERNEL); - if (acl == NULL) - return NULL; - acl->naces = 0; - return acl; + return sizeof(struct nfs4_acl) + entries * sizeof(struct nfs4_ace); } static struct { @@ -935,5 +940,5 @@ __be32 nfs4_acl_write_who(struct xdr_stream *xdr, int who) return 0; } WARN_ON_ONCE(1); - return -1; + return nfserr_serverfault; } diff --git a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c index 2c73cae9899d..e0be57b0f79b 100644 --- a/fs/nfsd/nfs4callback.c +++ b/fs/nfsd/nfs4callback.c @@ -337,7 +337,7 @@ static void encode_cb_recall4args(struct xdr_stream *xdr, p = xdr_reserve_space(xdr, 4); *p++ = xdr_zero; /* truncate */ - encode_nfs_fh4(xdr, &dp->dl_fh); + encode_nfs_fh4(xdr, &dp->dl_stid.sc_file->fi_fhandle); hdr->nops++; } @@ -678,7 +678,7 @@ static int setup_callback_client(struct nfs4_client *clp, struct nfs4_cb_conn *c (clp->cl_cred.cr_flavor >= RPC_AUTH_GSS_KRB5)) return -EINVAL; args.client_name = clp->cl_cred.cr_principal; - args.prognumber = conn->cb_prog, + args.prognumber = conn->cb_prog; args.protocol = XPRT_TRANSPORT_TCP; args.authflavor = clp->cl_cred.cr_flavor; clp->cl_cb_ident = conn->cb_ident; @@ -689,7 +689,8 @@ static int setup_callback_client(struct nfs4_client *clp, struct nfs4_cb_conn *c clp->cl_cb_session = ses; args.bc_xprt = conn->cb_xprt; args.prognumber = clp->cl_cb_session->se_cb_prog; - args.protocol = XPRT_TRANSPORT_BC_TCP; + args.protocol = conn->cb_xprt->xpt_class->xcl_ident | + XPRT_TRANSPORT_BC; args.authflavor = ses->se_cb_sec.flavor; } /* Create RPC client */ @@ -904,7 +905,7 @@ static void nfsd4_cb_recall_release(void *calldata) spin_lock(&clp->cl_lock); list_del(&cb->cb_per_client); spin_unlock(&clp->cl_lock); - nfs4_put_delegation(dp); + nfs4_put_stid(&dp->dl_stid); } } @@ -933,7 +934,7 @@ void nfsd4_shutdown_callback(struct nfs4_client *clp) set_bit(NFSD4_CLIENT_CB_KILL, &clp->cl_flags); /* * Note this won't actually result in a null callback; - * instead, nfsd4_do_callback_rpc() will detect the killed + * instead, nfsd4_run_cb_null() will detect the killed * client, destroy the rpc client, and stop: */ do_probe_callback(clp); @@ -1011,9 +1012,9 @@ static void nfsd4_process_cb_update(struct nfsd4_callback *cb) run_nfsd4_cb(cb); } -static void nfsd4_do_callback_rpc(struct work_struct *w) +static void +nfsd4_run_callback_rpc(struct nfsd4_callback *cb) { - struct nfsd4_callback *cb = container_of(w, struct nfsd4_callback, cb_work); struct nfs4_client *clp = cb->cb_clp; struct rpc_clnt *clnt; @@ -1031,9 +1032,22 @@ static void nfsd4_do_callback_rpc(struct work_struct *w) cb->cb_ops, cb); } -void nfsd4_init_callback(struct nfsd4_callback *cb) +void +nfsd4_run_cb_null(struct work_struct *w) { - INIT_WORK(&cb->cb_work, nfsd4_do_callback_rpc); + struct nfsd4_callback *cb = container_of(w, struct nfsd4_callback, + cb_work); + nfsd4_run_callback_rpc(cb); +} + +void +nfsd4_run_cb_recall(struct work_struct *w) +{ + struct nfsd4_callback *cb = container_of(w, struct nfsd4_callback, + cb_work); + + nfsd4_prepare_cb_recall(cb->cb_op); + nfsd4_run_callback_rpc(cb); } void nfsd4_cb_recall(struct nfs4_delegation *dp) diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c index 8f029db5d271..5e0dc528a0e8 100644 --- a/fs/nfsd/nfs4proc.c +++ b/fs/nfsd/nfs4proc.c @@ -177,7 +177,7 @@ fh_dup2(struct svc_fh *dst, struct svc_fh *src) fh_put(dst); dget(src->fh_dentry); if (src->fh_export) - cache_get(&src->fh_export->h); + exp_get(src->fh_export); *dst = *src; } @@ -385,8 +385,6 @@ nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, if (nfsd4_has_session(cstate)) copy_clientid(&open->op_clientid, cstate->session); - nfs4_lock_state(); - /* check seqid for replay. set nfs4_owner */ resp = rqstp->rq_resp; status = nfsd4_process_open1(&resp->cstate, open, nn); @@ -431,8 +429,7 @@ nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, break; case NFS4_OPEN_CLAIM_PREVIOUS: status = nfs4_check_open_reclaim(&open->op_clientid, - cstate->minorversion, - nn); + cstate, nn); if (status) goto out; open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; @@ -461,19 +458,17 @@ nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, * set, (2) sets open->op_stateid, (3) sets open->op_delegation. */ status = nfsd4_process_open2(rqstp, resfh, open); - WARN_ON(status && open->op_created); + WARN(status && open->op_created, + "nfsd4_process_open2 failed to open newly-created file! status=%u\n", + be32_to_cpu(status)); out: if (resfh && resfh != &cstate->current_fh) { fh_dup2(&cstate->current_fh, resfh); fh_put(resfh); kfree(resfh); } - nfsd4_cleanup_open_state(open, status); - if (open->op_openowner && !nfsd4_has_session(cstate)) - cstate->replay_owner = &open->op_openowner->oo_owner; + nfsd4_cleanup_open_state(cstate, open, status); nfsd4_bump_seqid(cstate, status); - if (!cstate->replay_owner) - nfs4_unlock_state(); return status; } @@ -581,8 +576,12 @@ static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net) __be32 verf[2]; struct nfsd_net *nn = net_generic(net, nfsd_net_id); - verf[0] = (__be32)nn->nfssvc_boot.tv_sec; - verf[1] = (__be32)nn->nfssvc_boot.tv_usec; + /* + * This is opaque to client, so no need to byte-swap. Use + * __force to keep sparse happy + */ + verf[0] = (__force __be32)nn->nfssvc_boot.tv_sec; + verf[1] = (__force __be32)nn->nfssvc_boot.tv_usec; memcpy(verifier->data, verf, sizeof(verifier->data)); } @@ -619,8 +618,7 @@ nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, case NF4LNK: status = nfsd_symlink(rqstp, &cstate->current_fh, create->cr_name, create->cr_namelen, - create->cr_linkname, create->cr_linklen, - &resfh, &create->cr_iattr); + create->cr_data, &resfh); break; case NF4BLK: @@ -909,8 +907,8 @@ nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstat default: return nfserr_inval; } - exp_get(cstate->current_fh.fh_export); - sin->sin_exp = cstate->current_fh.fh_export; + + sin->sin_exp = exp_get(cstate->current_fh.fh_export); fh_put(&cstate->current_fh); return nfs_ok; } @@ -1289,7 +1287,7 @@ nfsd4_proc_compound(struct svc_rqst *rqstp, * Don't use the deferral mechanism for NFSv4; compounds make it * too hard to avoid non-idempotency problems. */ - rqstp->rq_usedeferral = 0; + rqstp->rq_usedeferral = false; /* * According to RFC3010, this takes precedence over all other errors. @@ -1391,10 +1389,7 @@ encode_op: args->ops, args->opcnt, resp->opcnt, op->opnum, be32_to_cpu(status)); - if (cstate->replay_owner) { - nfs4_unlock_state(); - cstate->replay_owner = NULL; - } + nfsd4_cstate_clear_replay(cstate); /* XXX Ugh, we need to get rid of this kind of special case: */ if (op->opnum == OP_READ && op->u.read.rd_filp) fput(op->u.read.rd_filp); @@ -1408,7 +1403,7 @@ encode_op: BUG_ON(cstate->replay_owner); out: /* Reset deferral mechanism for RPC deferrals */ - rqstp->rq_usedeferral = 1; + rqstp->rq_usedeferral = true; dprintk("nfsv4 compound returned %d\n", ntohl(status)); return status; } @@ -1520,21 +1515,17 @@ static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) u32 maxcount = 0, rlen = 0; maxcount = svc_max_payload(rqstp); - rlen = op->u.read.rd_length; - - if (rlen > maxcount) - rlen = maxcount; + rlen = min(op->u.read.rd_length, maxcount); return (op_encode_hdr_size + 2 + XDR_QUADLEN(rlen)) * sizeof(__be32); } static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) { - u32 maxcount = svc_max_payload(rqstp); - u32 rlen = op->u.readdir.rd_maxcount; + u32 maxcount = 0, rlen = 0; - if (rlen > maxcount) - rlen = maxcount; + maxcount = svc_max_payload(rqstp); + rlen = min(op->u.readdir.rd_maxcount, maxcount); return (op_encode_hdr_size + op_encode_verifier_maxsz + XDR_QUADLEN(rlen)) * sizeof(__be32); diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 2204e1fe5725..2e80a59e7e91 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -70,13 +70,11 @@ static u64 current_sessionid = 1; #define CURRENT_STATEID(stateid) (!memcmp((stateid), ¤tstateid, sizeof(stateid_t))) /* forward declarations */ -static int check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner); +static bool check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *lowner); +static void nfs4_free_ol_stateid(struct nfs4_stid *stid); /* Locking: */ -/* Currently used for almost all code touching nfsv4 state: */ -static DEFINE_MUTEX(client_mutex); - /* * Currently used for the del_recall_lru and file hash table. In an * effort to decrease the scope of the client_mutex, this spinlock may @@ -84,18 +82,18 @@ static DEFINE_MUTEX(client_mutex); */ static DEFINE_SPINLOCK(state_lock); +/* + * A waitqueue for all in-progress 4.0 CLOSE operations that are waiting for + * the refcount on the open stateid to drop. + */ +static DECLARE_WAIT_QUEUE_HEAD(close_wq); + static struct kmem_cache *openowner_slab; static struct kmem_cache *lockowner_slab; static struct kmem_cache *file_slab; static struct kmem_cache *stateid_slab; static struct kmem_cache *deleg_slab; -void -nfs4_lock_state(void) -{ - mutex_lock(&client_mutex); -} - static void free_session(struct nfsd4_session *); static bool is_session_dead(struct nfsd4_session *ses) @@ -103,12 +101,6 @@ static bool is_session_dead(struct nfsd4_session *ses) return ses->se_flags & NFS4_SESSION_DEAD; } -void nfsd4_put_session(struct nfsd4_session *ses) -{ - if (atomic_dec_and_test(&ses->se_ref) && is_session_dead(ses)) - free_session(ses); -} - static __be32 mark_session_dead_locked(struct nfsd4_session *ses, int ref_held_by_me) { if (atomic_read(&ses->se_ref) > ref_held_by_me) @@ -117,46 +109,17 @@ static __be32 mark_session_dead_locked(struct nfsd4_session *ses, int ref_held_b return nfs_ok; } -static __be32 nfsd4_get_session_locked(struct nfsd4_session *ses) -{ - if (is_session_dead(ses)) - return nfserr_badsession; - atomic_inc(&ses->se_ref); - return nfs_ok; -} - -void -nfs4_unlock_state(void) -{ - mutex_unlock(&client_mutex); -} - static bool is_client_expired(struct nfs4_client *clp) { return clp->cl_time == 0; } -static __be32 mark_client_expired_locked(struct nfs4_client *clp) -{ - if (atomic_read(&clp->cl_refcount)) - return nfserr_jukebox; - clp->cl_time = 0; - return nfs_ok; -} - -static __be32 mark_client_expired(struct nfs4_client *clp) +static __be32 get_client_locked(struct nfs4_client *clp) { struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); - __be32 ret; - spin_lock(&nn->client_lock); - ret = mark_client_expired_locked(clp); - spin_unlock(&nn->client_lock); - return ret; -} + lockdep_assert_held(&nn->client_lock); -static __be32 get_client_locked(struct nfs4_client *clp) -{ if (is_client_expired(clp)) return nfserr_expired; atomic_inc(&clp->cl_refcount); @@ -197,13 +160,17 @@ renew_client(struct nfs4_client *clp) static void put_client_renew_locked(struct nfs4_client *clp) { + struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); + + lockdep_assert_held(&nn->client_lock); + if (!atomic_dec_and_test(&clp->cl_refcount)) return; if (!is_client_expired(clp)) renew_client_locked(clp); } -void put_client_renew(struct nfs4_client *clp) +static void put_client_renew(struct nfs4_client *clp) { struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); @@ -214,6 +181,79 @@ void put_client_renew(struct nfs4_client *clp) spin_unlock(&nn->client_lock); } +static __be32 nfsd4_get_session_locked(struct nfsd4_session *ses) +{ + __be32 status; + + if (is_session_dead(ses)) + return nfserr_badsession; + status = get_client_locked(ses->se_client); + if (status) + return status; + atomic_inc(&ses->se_ref); + return nfs_ok; +} + +static void nfsd4_put_session_locked(struct nfsd4_session *ses) +{ + struct nfs4_client *clp = ses->se_client; + struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); + + lockdep_assert_held(&nn->client_lock); + + if (atomic_dec_and_test(&ses->se_ref) && is_session_dead(ses)) + free_session(ses); + put_client_renew_locked(clp); +} + +static void nfsd4_put_session(struct nfsd4_session *ses) +{ + struct nfs4_client *clp = ses->se_client; + struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); + + spin_lock(&nn->client_lock); + nfsd4_put_session_locked(ses); + spin_unlock(&nn->client_lock); +} + +static int +same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner) +{ + return (sop->so_owner.len == owner->len) && + 0 == memcmp(sop->so_owner.data, owner->data, owner->len); +} + +static struct nfs4_openowner * +find_openstateowner_str_locked(unsigned int hashval, struct nfsd4_open *open, + struct nfs4_client *clp) +{ + struct nfs4_stateowner *so; + + lockdep_assert_held(&clp->cl_lock); + + list_for_each_entry(so, &clp->cl_ownerstr_hashtbl[hashval], + so_strhash) { + if (!so->so_is_open_owner) + continue; + if (same_owner_str(so, &open->op_owner)) { + atomic_inc(&so->so_count); + return openowner(so); + } + } + return NULL; +} + +static struct nfs4_openowner * +find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open, + struct nfs4_client *clp) +{ + struct nfs4_openowner *oo; + + spin_lock(&clp->cl_lock); + oo = find_openstateowner_str_locked(hashval, open, clp); + spin_unlock(&clp->cl_lock); + return oo; +} static inline u32 opaque_hashval(const void *ptr, int nbytes) @@ -236,10 +276,11 @@ static void nfsd4_free_file(struct nfs4_file *f) static inline void put_nfs4_file(struct nfs4_file *fi) { + might_lock(&state_lock); + if (atomic_dec_and_lock(&fi->fi_ref, &state_lock)) { hlist_del(&fi->fi_hash); spin_unlock(&state_lock); - iput(fi->fi_inode); nfsd4_free_file(fi); } } @@ -250,7 +291,80 @@ get_nfs4_file(struct nfs4_file *fi) atomic_inc(&fi->fi_ref); } -static int num_delegations; +static struct file * +__nfs4_get_fd(struct nfs4_file *f, int oflag) +{ + if (f->fi_fds[oflag]) + return get_file(f->fi_fds[oflag]); + return NULL; +} + +static struct file * +find_writeable_file_locked(struct nfs4_file *f) +{ + struct file *ret; + + lockdep_assert_held(&f->fi_lock); + + ret = __nfs4_get_fd(f, O_WRONLY); + if (!ret) + ret = __nfs4_get_fd(f, O_RDWR); + return ret; +} + +static struct file * +find_writeable_file(struct nfs4_file *f) +{ + struct file *ret; + + spin_lock(&f->fi_lock); + ret = find_writeable_file_locked(f); + spin_unlock(&f->fi_lock); + + return ret; +} + +static struct file *find_readable_file_locked(struct nfs4_file *f) +{ + struct file *ret; + + lockdep_assert_held(&f->fi_lock); + + ret = __nfs4_get_fd(f, O_RDONLY); + if (!ret) + ret = __nfs4_get_fd(f, O_RDWR); + return ret; +} + +static struct file * +find_readable_file(struct nfs4_file *f) +{ + struct file *ret; + + spin_lock(&f->fi_lock); + ret = find_readable_file_locked(f); + spin_unlock(&f->fi_lock); + + return ret; +} + +static struct file * +find_any_file(struct nfs4_file *f) +{ + struct file *ret; + + spin_lock(&f->fi_lock); + ret = __nfs4_get_fd(f, O_RDWR); + if (!ret) { + ret = __nfs4_get_fd(f, O_WRONLY); + if (!ret) + ret = __nfs4_get_fd(f, O_RDONLY); + } + spin_unlock(&f->fi_lock); + return ret; +} + +static atomic_long_t num_delegations; unsigned long max_delegations; /* @@ -262,12 +376,11 @@ unsigned long max_delegations; #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) -static unsigned int ownerstr_hashval(u32 clientid, struct xdr_netobj *ownername) +static unsigned int ownerstr_hashval(struct xdr_netobj *ownername) { unsigned int ret; ret = opaque_hashval(ownername->data, ownername->len); - ret += clientid; return ret & OWNER_HASH_MASK; } @@ -275,75 +388,124 @@ static unsigned int ownerstr_hashval(u32 clientid, struct xdr_netobj *ownername) #define FILE_HASH_BITS 8 #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) -static unsigned int file_hashval(struct inode *ino) +static unsigned int nfsd_fh_hashval(struct knfsd_fh *fh) +{ + return jhash2(fh->fh_base.fh_pad, XDR_QUADLEN(fh->fh_size), 0); +} + +static unsigned int file_hashval(struct knfsd_fh *fh) +{ + return nfsd_fh_hashval(fh) & (FILE_HASH_SIZE - 1); +} + +static bool nfsd_fh_match(struct knfsd_fh *fh1, struct knfsd_fh *fh2) { - /* XXX: why are we hashing on inode pointer, anyway? */ - return hash_ptr(ino, FILE_HASH_BITS); + return fh1->fh_size == fh2->fh_size && + !memcmp(fh1->fh_base.fh_pad, + fh2->fh_base.fh_pad, + fh1->fh_size); } static struct hlist_head file_hashtbl[FILE_HASH_SIZE]; -static void __nfs4_file_get_access(struct nfs4_file *fp, int oflag) +static void +__nfs4_file_get_access(struct nfs4_file *fp, u32 access) { - WARN_ON_ONCE(!(fp->fi_fds[oflag] || fp->fi_fds[O_RDWR])); - atomic_inc(&fp->fi_access[oflag]); + lockdep_assert_held(&fp->fi_lock); + + if (access & NFS4_SHARE_ACCESS_WRITE) + atomic_inc(&fp->fi_access[O_WRONLY]); + if (access & NFS4_SHARE_ACCESS_READ) + atomic_inc(&fp->fi_access[O_RDONLY]); } -static void nfs4_file_get_access(struct nfs4_file *fp, int oflag) +static __be32 +nfs4_file_get_access(struct nfs4_file *fp, u32 access) { - if (oflag == O_RDWR) { - __nfs4_file_get_access(fp, O_RDONLY); - __nfs4_file_get_access(fp, O_WRONLY); - } else - __nfs4_file_get_access(fp, oflag); + lockdep_assert_held(&fp->fi_lock); + + /* Does this access mode make sense? */ + if (access & ~NFS4_SHARE_ACCESS_BOTH) + return nfserr_inval; + + /* Does it conflict with a deny mode already set? */ + if ((access & fp->fi_share_deny) != 0) + return nfserr_share_denied; + + __nfs4_file_get_access(fp, access); + return nfs_ok; } -static void nfs4_file_put_fd(struct nfs4_file *fp, int oflag) +static __be32 nfs4_file_check_deny(struct nfs4_file *fp, u32 deny) { - if (fp->fi_fds[oflag]) { - fput(fp->fi_fds[oflag]); - fp->fi_fds[oflag] = NULL; + /* Common case is that there is no deny mode. */ + if (deny) { + /* Does this deny mode make sense? */ + if (deny & ~NFS4_SHARE_DENY_BOTH) + return nfserr_inval; + + if ((deny & NFS4_SHARE_DENY_READ) && + atomic_read(&fp->fi_access[O_RDONLY])) + return nfserr_share_denied; + + if ((deny & NFS4_SHARE_DENY_WRITE) && + atomic_read(&fp->fi_access[O_WRONLY])) + return nfserr_share_denied; } + return nfs_ok; } static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) { - if (atomic_dec_and_test(&fp->fi_access[oflag])) { - nfs4_file_put_fd(fp, oflag); + might_lock(&fp->fi_lock); + + if (atomic_dec_and_lock(&fp->fi_access[oflag], &fp->fi_lock)) { + struct file *f1 = NULL; + struct file *f2 = NULL; + + swap(f1, fp->fi_fds[oflag]); if (atomic_read(&fp->fi_access[1 - oflag]) == 0) - nfs4_file_put_fd(fp, O_RDWR); + swap(f2, fp->fi_fds[O_RDWR]); + spin_unlock(&fp->fi_lock); + if (f1) + fput(f1); + if (f2) + fput(f2); } } -static void nfs4_file_put_access(struct nfs4_file *fp, int oflag) +static void nfs4_file_put_access(struct nfs4_file *fp, u32 access) { - if (oflag == O_RDWR) { - __nfs4_file_put_access(fp, O_RDONLY); + WARN_ON_ONCE(access & ~NFS4_SHARE_ACCESS_BOTH); + + if (access & NFS4_SHARE_ACCESS_WRITE) __nfs4_file_put_access(fp, O_WRONLY); - } else - __nfs4_file_put_access(fp, oflag); + if (access & NFS4_SHARE_ACCESS_READ) + __nfs4_file_put_access(fp, O_RDONLY); } -static struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct -kmem_cache *slab) +static struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, + struct kmem_cache *slab) { - struct idr *stateids = &cl->cl_stateids; struct nfs4_stid *stid; int new_id; - stid = kmem_cache_alloc(slab, GFP_KERNEL); + stid = kmem_cache_zalloc(slab, GFP_KERNEL); if (!stid) return NULL; - new_id = idr_alloc_cyclic(stateids, stid, 0, 0, GFP_KERNEL); + idr_preload(GFP_KERNEL); + spin_lock(&cl->cl_lock); + new_id = idr_alloc_cyclic(&cl->cl_stateids, stid, 0, 0, GFP_NOWAIT); + spin_unlock(&cl->cl_lock); + idr_preload_end(); if (new_id < 0) goto out_free; stid->sc_client = cl; - stid->sc_type = 0; stid->sc_stateid.si_opaque.so_id = new_id; stid->sc_stateid.si_opaque.so_clid = cl->cl_clientid; /* Will be incremented before return to client: */ - stid->sc_stateid.si_generation = 0; + atomic_set(&stid->sc_count, 1); /* * It shouldn't be a problem to reuse an opaque stateid value. @@ -360,9 +522,24 @@ out_free: return NULL; } -static struct nfs4_ol_stateid * nfs4_alloc_stateid(struct nfs4_client *clp) +static struct nfs4_ol_stateid * nfs4_alloc_open_stateid(struct nfs4_client *clp) { - return openlockstateid(nfs4_alloc_stid(clp, stateid_slab)); + struct nfs4_stid *stid; + struct nfs4_ol_stateid *stp; + + stid = nfs4_alloc_stid(clp, stateid_slab); + if (!stid) + return NULL; + + stp = openlockstateid(stid); + stp->st_stid.sc_free = nfs4_free_ol_stateid; + return stp; +} + +static void nfs4_free_deleg(struct nfs4_stid *stid) +{ + kmem_cache_free(deleg_slab, stid); + atomic_long_dec(&num_delegations); } /* @@ -379,10 +556,11 @@ static struct nfs4_ol_stateid * nfs4_alloc_stateid(struct nfs4_client *clp) * Each filter is 256 bits. We hash the filehandle to 32bit and use the * low 3 bytes as hash-table indices. * - * 'state_lock', which is always held when block_delegations() is called, + * 'blocked_delegations_lock', which is always taken in block_delegations(), * is used to manage concurrent access. Testing does not need the lock * except when swapping the two filters. */ +static DEFINE_SPINLOCK(blocked_delegations_lock); static struct bloom_pair { int entries, old_entries; time_t swap_time; @@ -398,7 +576,7 @@ static int delegation_blocked(struct knfsd_fh *fh) if (bd->entries == 0) return 0; if (seconds_since_boot() - bd->swap_time > 30) { - spin_lock(&state_lock); + spin_lock(&blocked_delegations_lock); if (seconds_since_boot() - bd->swap_time > 30) { bd->entries -= bd->old_entries; bd->old_entries = bd->entries; @@ -407,7 +585,7 @@ static int delegation_blocked(struct knfsd_fh *fh) bd->new = 1-bd->new; bd->swap_time = seconds_since_boot(); } - spin_unlock(&state_lock); + spin_unlock(&blocked_delegations_lock); } hash = arch_fast_hash(&fh->fh_base, fh->fh_size, 0); if (test_bit(hash&255, bd->set[0]) && @@ -430,69 +608,73 @@ static void block_delegations(struct knfsd_fh *fh) hash = arch_fast_hash(&fh->fh_base, fh->fh_size, 0); + spin_lock(&blocked_delegations_lock); __set_bit(hash&255, bd->set[bd->new]); __set_bit((hash>>8)&255, bd->set[bd->new]); __set_bit((hash>>16)&255, bd->set[bd->new]); if (bd->entries == 0) bd->swap_time = seconds_since_boot(); bd->entries += 1; + spin_unlock(&blocked_delegations_lock); } static struct nfs4_delegation * -alloc_init_deleg(struct nfs4_client *clp, struct nfs4_ol_stateid *stp, struct svc_fh *current_fh) +alloc_init_deleg(struct nfs4_client *clp, struct svc_fh *current_fh) { struct nfs4_delegation *dp; + long n; dprintk("NFSD alloc_init_deleg\n"); - if (num_delegations > max_delegations) - return NULL; + n = atomic_long_inc_return(&num_delegations); + if (n < 0 || n > max_delegations) + goto out_dec; if (delegation_blocked(¤t_fh->fh_handle)) - return NULL; + goto out_dec; dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab)); if (dp == NULL) - return dp; + goto out_dec; + + dp->dl_stid.sc_free = nfs4_free_deleg; /* * delegation seqid's are never incremented. The 4.1 special * meaning of seqid 0 isn't meaningful, really, but let's avoid * 0 anyway just for consistency and use 1: */ dp->dl_stid.sc_stateid.si_generation = 1; - num_delegations++; INIT_LIST_HEAD(&dp->dl_perfile); INIT_LIST_HEAD(&dp->dl_perclnt); INIT_LIST_HEAD(&dp->dl_recall_lru); - dp->dl_file = NULL; dp->dl_type = NFS4_OPEN_DELEGATE_READ; - fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); - dp->dl_time = 0; - atomic_set(&dp->dl_count, 1); - nfsd4_init_callback(&dp->dl_recall); + INIT_WORK(&dp->dl_recall.cb_work, nfsd4_run_cb_recall); return dp; +out_dec: + atomic_long_dec(&num_delegations); + return NULL; } -static void remove_stid(struct nfs4_stid *s) +void +nfs4_put_stid(struct nfs4_stid *s) { - struct idr *stateids = &s->sc_client->cl_stateids; + struct nfs4_file *fp = s->sc_file; + struct nfs4_client *clp = s->sc_client; - idr_remove(stateids, s->sc_stateid.si_opaque.so_id); -} + might_lock(&clp->cl_lock); -static void nfs4_free_stid(struct kmem_cache *slab, struct nfs4_stid *s) -{ - kmem_cache_free(slab, s); -} - -void -nfs4_put_delegation(struct nfs4_delegation *dp) -{ - if (atomic_dec_and_test(&dp->dl_count)) { - nfs4_free_stid(deleg_slab, &dp->dl_stid); - num_delegations--; + if (!atomic_dec_and_lock(&s->sc_count, &clp->cl_lock)) { + wake_up_all(&close_wq); + return; } + idr_remove(&clp->cl_stateids, s->sc_stateid.si_opaque.so_id); + spin_unlock(&clp->cl_lock); + s->sc_free(s); + if (fp) + put_nfs4_file(fp); } static void nfs4_put_deleg_lease(struct nfs4_file *fp) { + lockdep_assert_held(&state_lock); + if (!fp->fi_lease) return; if (atomic_dec_and_test(&fp->fi_delegees)) { @@ -512,54 +694,54 @@ static void hash_delegation_locked(struct nfs4_delegation *dp, struct nfs4_file *fp) { lockdep_assert_held(&state_lock); + lockdep_assert_held(&fp->fi_lock); + atomic_inc(&dp->dl_stid.sc_count); dp->dl_stid.sc_type = NFS4_DELEG_STID; list_add(&dp->dl_perfile, &fp->fi_delegations); list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); } -/* Called under the state lock. */ static void -unhash_delegation(struct nfs4_delegation *dp) +unhash_delegation_locked(struct nfs4_delegation *dp) { - spin_lock(&state_lock); - list_del_init(&dp->dl_perclnt); - list_del_init(&dp->dl_perfile); - list_del_init(&dp->dl_recall_lru); - spin_unlock(&state_lock); - if (dp->dl_file) { - nfs4_put_deleg_lease(dp->dl_file); - put_nfs4_file(dp->dl_file); - dp->dl_file = NULL; - } -} - + struct nfs4_file *fp = dp->dl_stid.sc_file; + lockdep_assert_held(&state_lock); -static void destroy_revoked_delegation(struct nfs4_delegation *dp) -{ + dp->dl_stid.sc_type = NFS4_CLOSED_DELEG_STID; + /* Ensure that deleg break won't try to requeue it */ + ++dp->dl_time; + spin_lock(&fp->fi_lock); + list_del_init(&dp->dl_perclnt); list_del_init(&dp->dl_recall_lru); - remove_stid(&dp->dl_stid); - nfs4_put_delegation(dp); + list_del_init(&dp->dl_perfile); + spin_unlock(&fp->fi_lock); + if (fp) + nfs4_put_deleg_lease(fp); } static void destroy_delegation(struct nfs4_delegation *dp) { - unhash_delegation(dp); - remove_stid(&dp->dl_stid); - nfs4_put_delegation(dp); + spin_lock(&state_lock); + unhash_delegation_locked(dp); + spin_unlock(&state_lock); + nfs4_put_stid(&dp->dl_stid); } static void revoke_delegation(struct nfs4_delegation *dp) { struct nfs4_client *clp = dp->dl_stid.sc_client; + WARN_ON(!list_empty(&dp->dl_recall_lru)); + if (clp->cl_minorversion == 0) - destroy_delegation(dp); + nfs4_put_stid(&dp->dl_stid); else { - unhash_delegation(dp); dp->dl_stid.sc_type = NFS4_REVOKED_DELEG_STID; + spin_lock(&clp->cl_lock); list_add(&dp->dl_recall_lru, &clp->cl_revoked); + spin_unlock(&clp->cl_lock); } } @@ -607,57 +789,62 @@ bmap_to_share_mode(unsigned long bmap) { return access; } -static bool -test_share(struct nfs4_ol_stateid *stp, struct nfsd4_open *open) { - unsigned int access, deny; - - access = bmap_to_share_mode(stp->st_access_bmap); - deny = bmap_to_share_mode(stp->st_deny_bmap); - if ((access & open->op_share_deny) || (deny & open->op_share_access)) - return false; - return true; -} - /* set share access for a given stateid */ static inline void set_access(u32 access, struct nfs4_ol_stateid *stp) { - __set_bit(access, &stp->st_access_bmap); + unsigned char mask = 1 << access; + + WARN_ON_ONCE(access > NFS4_SHARE_ACCESS_BOTH); + stp->st_access_bmap |= mask; } /* clear share access for a given stateid */ static inline void clear_access(u32 access, struct nfs4_ol_stateid *stp) { - __clear_bit(access, &stp->st_access_bmap); + unsigned char mask = 1 << access; + + WARN_ON_ONCE(access > NFS4_SHARE_ACCESS_BOTH); + stp->st_access_bmap &= ~mask; } /* test whether a given stateid has access */ static inline bool test_access(u32 access, struct nfs4_ol_stateid *stp) { - return test_bit(access, &stp->st_access_bmap); + unsigned char mask = 1 << access; + + return (bool)(stp->st_access_bmap & mask); } /* set share deny for a given stateid */ static inline void -set_deny(u32 access, struct nfs4_ol_stateid *stp) +set_deny(u32 deny, struct nfs4_ol_stateid *stp) { - __set_bit(access, &stp->st_deny_bmap); + unsigned char mask = 1 << deny; + + WARN_ON_ONCE(deny > NFS4_SHARE_DENY_BOTH); + stp->st_deny_bmap |= mask; } /* clear share deny for a given stateid */ static inline void -clear_deny(u32 access, struct nfs4_ol_stateid *stp) +clear_deny(u32 deny, struct nfs4_ol_stateid *stp) { - __clear_bit(access, &stp->st_deny_bmap); + unsigned char mask = 1 << deny; + + WARN_ON_ONCE(deny > NFS4_SHARE_DENY_BOTH); + stp->st_deny_bmap &= ~mask; } /* test whether a given stateid is denying specific access */ static inline bool -test_deny(u32 access, struct nfs4_ol_stateid *stp) +test_deny(u32 deny, struct nfs4_ol_stateid *stp) { - return test_bit(access, &stp->st_deny_bmap); + unsigned char mask = 1 << deny; + + return (bool)(stp->st_deny_bmap & mask); } static int nfs4_access_to_omode(u32 access) @@ -674,138 +861,283 @@ static int nfs4_access_to_omode(u32 access) return O_RDONLY; } +/* + * A stateid that had a deny mode associated with it is being released + * or downgraded. Recalculate the deny mode on the file. + */ +static void +recalculate_deny_mode(struct nfs4_file *fp) +{ + struct nfs4_ol_stateid *stp; + + spin_lock(&fp->fi_lock); + fp->fi_share_deny = 0; + list_for_each_entry(stp, &fp->fi_stateids, st_perfile) + fp->fi_share_deny |= bmap_to_share_mode(stp->st_deny_bmap); + spin_unlock(&fp->fi_lock); +} + +static void +reset_union_bmap_deny(u32 deny, struct nfs4_ol_stateid *stp) +{ + int i; + bool change = false; + + for (i = 1; i < 4; i++) { + if ((i & deny) != i) { + change = true; + clear_deny(i, stp); + } + } + + /* Recalculate per-file deny mode if there was a change */ + if (change) + recalculate_deny_mode(stp->st_stid.sc_file); +} + /* release all access and file references for a given stateid */ static void release_all_access(struct nfs4_ol_stateid *stp) { int i; + struct nfs4_file *fp = stp->st_stid.sc_file; + + if (fp && stp->st_deny_bmap != 0) + recalculate_deny_mode(fp); for (i = 1; i < 4; i++) { if (test_access(i, stp)) - nfs4_file_put_access(stp->st_file, - nfs4_access_to_omode(i)); + nfs4_file_put_access(stp->st_stid.sc_file, i); clear_access(i, stp); } } -static void unhash_generic_stateid(struct nfs4_ol_stateid *stp) +static void nfs4_put_stateowner(struct nfs4_stateowner *sop) { + struct nfs4_client *clp = sop->so_client; + + might_lock(&clp->cl_lock); + + if (!atomic_dec_and_lock(&sop->so_count, &clp->cl_lock)) + return; + sop->so_ops->so_unhash(sop); + spin_unlock(&clp->cl_lock); + kfree(sop->so_owner.data); + sop->so_ops->so_free(sop); +} + +static void unhash_ol_stateid(struct nfs4_ol_stateid *stp) +{ + struct nfs4_file *fp = stp->st_stid.sc_file; + + lockdep_assert_held(&stp->st_stateowner->so_client->cl_lock); + + spin_lock(&fp->fi_lock); list_del(&stp->st_perfile); + spin_unlock(&fp->fi_lock); list_del(&stp->st_perstateowner); } -static void close_generic_stateid(struct nfs4_ol_stateid *stp) +static void nfs4_free_ol_stateid(struct nfs4_stid *stid) { + struct nfs4_ol_stateid *stp = openlockstateid(stid); + release_all_access(stp); - put_nfs4_file(stp->st_file); - stp->st_file = NULL; + if (stp->st_stateowner) + nfs4_put_stateowner(stp->st_stateowner); + kmem_cache_free(stateid_slab, stid); } -static void free_generic_stateid(struct nfs4_ol_stateid *stp) +static void nfs4_free_lock_stateid(struct nfs4_stid *stid) { - remove_stid(&stp->st_stid); - nfs4_free_stid(stateid_slab, &stp->st_stid); + struct nfs4_ol_stateid *stp = openlockstateid(stid); + struct nfs4_lockowner *lo = lockowner(stp->st_stateowner); + struct file *file; + + file = find_any_file(stp->st_stid.sc_file); + if (file) + filp_close(file, (fl_owner_t)lo); + nfs4_free_ol_stateid(stid); } -static void release_lock_stateid(struct nfs4_ol_stateid *stp) +/* + * Put the persistent reference to an already unhashed generic stateid, while + * holding the cl_lock. If it's the last reference, then put it onto the + * reaplist for later destruction. + */ +static void put_ol_stateid_locked(struct nfs4_ol_stateid *stp, + struct list_head *reaplist) { - struct file *file; + struct nfs4_stid *s = &stp->st_stid; + struct nfs4_client *clp = s->sc_client; + + lockdep_assert_held(&clp->cl_lock); - unhash_generic_stateid(stp); + WARN_ON_ONCE(!list_empty(&stp->st_locks)); + + if (!atomic_dec_and_test(&s->sc_count)) { + wake_up_all(&close_wq); + return; + } + + idr_remove(&clp->cl_stateids, s->sc_stateid.si_opaque.so_id); + list_add(&stp->st_locks, reaplist); +} + +static void unhash_lock_stateid(struct nfs4_ol_stateid *stp) +{ + struct nfs4_openowner *oo = openowner(stp->st_openstp->st_stateowner); + + lockdep_assert_held(&oo->oo_owner.so_client->cl_lock); + + list_del_init(&stp->st_locks); + unhash_ol_stateid(stp); unhash_stid(&stp->st_stid); - file = find_any_file(stp->st_file); - if (file) - locks_remove_posix(file, (fl_owner_t)lockowner(stp->st_stateowner)); - close_generic_stateid(stp); - free_generic_stateid(stp); } -static void unhash_lockowner(struct nfs4_lockowner *lo) +static void release_lock_stateid(struct nfs4_ol_stateid *stp) { - struct nfs4_ol_stateid *stp; + struct nfs4_openowner *oo = openowner(stp->st_openstp->st_stateowner); - list_del(&lo->lo_owner.so_strhash); - list_del(&lo->lo_perstateid); - list_del(&lo->lo_owner_ino_hash); - while (!list_empty(&lo->lo_owner.so_stateids)) { - stp = list_first_entry(&lo->lo_owner.so_stateids, - struct nfs4_ol_stateid, st_perstateowner); - release_lock_stateid(stp); - } + spin_lock(&oo->oo_owner.so_client->cl_lock); + unhash_lock_stateid(stp); + spin_unlock(&oo->oo_owner.so_client->cl_lock); + nfs4_put_stid(&stp->st_stid); } -static void nfs4_free_lockowner(struct nfs4_lockowner *lo) +static void unhash_lockowner_locked(struct nfs4_lockowner *lo) { - kfree(lo->lo_owner.so_owner.data); - kmem_cache_free(lockowner_slab, lo); + struct nfs4_client *clp = lo->lo_owner.so_client; + + lockdep_assert_held(&clp->cl_lock); + + list_del_init(&lo->lo_owner.so_strhash); +} + +/* + * Free a list of generic stateids that were collected earlier after being + * fully unhashed. + */ +static void +free_ol_stateid_reaplist(struct list_head *reaplist) +{ + struct nfs4_ol_stateid *stp; + struct nfs4_file *fp; + + might_sleep(); + + while (!list_empty(reaplist)) { + stp = list_first_entry(reaplist, struct nfs4_ol_stateid, + st_locks); + list_del(&stp->st_locks); + fp = stp->st_stid.sc_file; + stp->st_stid.sc_free(&stp->st_stid); + if (fp) + put_nfs4_file(fp); + } } static void release_lockowner(struct nfs4_lockowner *lo) { - unhash_lockowner(lo); - nfs4_free_lockowner(lo); + struct nfs4_client *clp = lo->lo_owner.so_client; + struct nfs4_ol_stateid *stp; + struct list_head reaplist; + + INIT_LIST_HEAD(&reaplist); + + spin_lock(&clp->cl_lock); + unhash_lockowner_locked(lo); + while (!list_empty(&lo->lo_owner.so_stateids)) { + stp = list_first_entry(&lo->lo_owner.so_stateids, + struct nfs4_ol_stateid, st_perstateowner); + unhash_lock_stateid(stp); + put_ol_stateid_locked(stp, &reaplist); + } + spin_unlock(&clp->cl_lock); + free_ol_stateid_reaplist(&reaplist); + nfs4_put_stateowner(&lo->lo_owner); } -static void -release_stateid_lockowners(struct nfs4_ol_stateid *open_stp) +static void release_open_stateid_locks(struct nfs4_ol_stateid *open_stp, + struct list_head *reaplist) { - struct nfs4_lockowner *lo; + struct nfs4_ol_stateid *stp; - while (!list_empty(&open_stp->st_lockowners)) { - lo = list_entry(open_stp->st_lockowners.next, - struct nfs4_lockowner, lo_perstateid); - release_lockowner(lo); + while (!list_empty(&open_stp->st_locks)) { + stp = list_entry(open_stp->st_locks.next, + struct nfs4_ol_stateid, st_locks); + unhash_lock_stateid(stp); + put_ol_stateid_locked(stp, reaplist); } } -static void unhash_open_stateid(struct nfs4_ol_stateid *stp) +static void unhash_open_stateid(struct nfs4_ol_stateid *stp, + struct list_head *reaplist) { - unhash_generic_stateid(stp); - release_stateid_lockowners(stp); - close_generic_stateid(stp); + lockdep_assert_held(&stp->st_stid.sc_client->cl_lock); + + unhash_ol_stateid(stp); + release_open_stateid_locks(stp, reaplist); } static void release_open_stateid(struct nfs4_ol_stateid *stp) { - unhash_open_stateid(stp); - free_generic_stateid(stp); + LIST_HEAD(reaplist); + + spin_lock(&stp->st_stid.sc_client->cl_lock); + unhash_open_stateid(stp, &reaplist); + put_ol_stateid_locked(stp, &reaplist); + spin_unlock(&stp->st_stid.sc_client->cl_lock); + free_ol_stateid_reaplist(&reaplist); } -static void unhash_openowner(struct nfs4_openowner *oo) +static void unhash_openowner_locked(struct nfs4_openowner *oo) { - struct nfs4_ol_stateid *stp; + struct nfs4_client *clp = oo->oo_owner.so_client; - list_del(&oo->oo_owner.so_strhash); - list_del(&oo->oo_perclient); - while (!list_empty(&oo->oo_owner.so_stateids)) { - stp = list_first_entry(&oo->oo_owner.so_stateids, - struct nfs4_ol_stateid, st_perstateowner); - release_open_stateid(stp); - } + lockdep_assert_held(&clp->cl_lock); + + list_del_init(&oo->oo_owner.so_strhash); + list_del_init(&oo->oo_perclient); } static void release_last_closed_stateid(struct nfs4_openowner *oo) { - struct nfs4_ol_stateid *s = oo->oo_last_closed_stid; + struct nfsd_net *nn = net_generic(oo->oo_owner.so_client->net, + nfsd_net_id); + struct nfs4_ol_stateid *s; + spin_lock(&nn->client_lock); + s = oo->oo_last_closed_stid; if (s) { - free_generic_stateid(s); + list_del_init(&oo->oo_close_lru); oo->oo_last_closed_stid = NULL; } -} - -static void nfs4_free_openowner(struct nfs4_openowner *oo) -{ - kfree(oo->oo_owner.so_owner.data); - kmem_cache_free(openowner_slab, oo); + spin_unlock(&nn->client_lock); + if (s) + nfs4_put_stid(&s->st_stid); } static void release_openowner(struct nfs4_openowner *oo) { - unhash_openowner(oo); - list_del(&oo->oo_close_lru); + struct nfs4_ol_stateid *stp; + struct nfs4_client *clp = oo->oo_owner.so_client; + struct list_head reaplist; + + INIT_LIST_HEAD(&reaplist); + + spin_lock(&clp->cl_lock); + unhash_openowner_locked(oo); + while (!list_empty(&oo->oo_owner.so_stateids)) { + stp = list_first_entry(&oo->oo_owner.so_stateids, + struct nfs4_ol_stateid, st_perstateowner); + unhash_open_stateid(stp, &reaplist); + put_ol_stateid_locked(stp, &reaplist); + } + spin_unlock(&clp->cl_lock); + free_ol_stateid_reaplist(&reaplist); release_last_closed_stateid(oo); - nfs4_free_openowner(oo); + nfs4_put_stateowner(&oo->oo_owner); } static inline int @@ -842,7 +1174,7 @@ void nfsd4_bump_seqid(struct nfsd4_compound_state *cstate, __be32 nfserr) return; if (!seqid_mutating_err(ntohl(nfserr))) { - cstate->replay_owner = NULL; + nfsd4_cstate_clear_replay(cstate); return; } if (!so) @@ -1030,10 +1362,8 @@ static void nfsd4_init_conn(struct svc_rqst *rqstp, struct nfsd4_conn *conn, str if (ret) /* oops; xprt is already down: */ nfsd4_conn_lost(&conn->cn_xpt_user); - if (conn->cn_flags & NFS4_CDFC4_BACK) { - /* callback channel may be back up */ - nfsd4_probe_callback(ses->se_client); - } + /* We may have gained or lost a callback channel: */ + nfsd4_probe_callback_sync(ses->se_client); } static struct nfsd4_conn *alloc_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_create_session *cses) @@ -1073,9 +1403,6 @@ static void __free_session(struct nfsd4_session *ses) static void free_session(struct nfsd4_session *ses) { - struct nfsd_net *nn = net_generic(ses->se_client->net, nfsd_net_id); - - lockdep_assert_held(&nn->client_lock); nfsd4_del_conns(ses); nfsd4_put_drc_mem(&ses->se_fchannel); __free_session(ses); @@ -1097,12 +1424,10 @@ static void init_session(struct svc_rqst *rqstp, struct nfsd4_session *new, stru new->se_cb_sec = cses->cb_sec; atomic_set(&new->se_ref, 0); idx = hash_sessionid(&new->se_sessionid); - spin_lock(&nn->client_lock); list_add(&new->se_hash, &nn->sessionid_hashtbl[idx]); spin_lock(&clp->cl_lock); list_add(&new->se_perclnt, &clp->cl_sessions); spin_unlock(&clp->cl_lock); - spin_unlock(&nn->client_lock); if (cses->flags & SESSION4_BACK_CHAN) { struct sockaddr *sa = svc_addr(rqstp); @@ -1120,12 +1445,14 @@ static void init_session(struct svc_rqst *rqstp, struct nfsd4_session *new, stru /* caller must hold client_lock */ static struct nfsd4_session * -find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net) +__find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net) { struct nfsd4_session *elem; int idx; struct nfsd_net *nn = net_generic(net, nfsd_net_id); + lockdep_assert_held(&nn->client_lock); + dump_sessionid(__func__, sessionid); idx = hash_sessionid(sessionid); /* Search in the appropriate list */ @@ -1140,10 +1467,33 @@ find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net) return NULL; } +static struct nfsd4_session * +find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net, + __be32 *ret) +{ + struct nfsd4_session *session; + __be32 status = nfserr_badsession; + + session = __find_in_sessionid_hashtbl(sessionid, net); + if (!session) + goto out; + status = nfsd4_get_session_locked(session); + if (status) + session = NULL; +out: + *ret = status; + return session; +} + /* caller must hold client_lock */ static void unhash_session(struct nfsd4_session *ses) { + struct nfs4_client *clp = ses->se_client; + struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); + + lockdep_assert_held(&nn->client_lock); + list_del(&ses->se_hash); spin_lock(&ses->se_client->cl_lock); list_del(&ses->se_perclnt); @@ -1169,15 +1519,20 @@ STALE_CLIENTID(clientid_t *clid, struct nfsd_net *nn) static struct nfs4_client *alloc_client(struct xdr_netobj name) { struct nfs4_client *clp; + int i; clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); if (clp == NULL) return NULL; clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL); - if (clp->cl_name.data == NULL) { - kfree(clp); - return NULL; - } + if (clp->cl_name.data == NULL) + goto err_no_name; + clp->cl_ownerstr_hashtbl = kmalloc(sizeof(struct list_head) * + OWNER_HASH_SIZE, GFP_KERNEL); + if (!clp->cl_ownerstr_hashtbl) + goto err_no_hashtbl; + for (i = 0; i < OWNER_HASH_SIZE; i++) + INIT_LIST_HEAD(&clp->cl_ownerstr_hashtbl[i]); clp->cl_name.len = name.len; INIT_LIST_HEAD(&clp->cl_sessions); idr_init(&clp->cl_stateids); @@ -1192,14 +1547,16 @@ static struct nfs4_client *alloc_client(struct xdr_netobj name) spin_lock_init(&clp->cl_lock); rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); return clp; +err_no_hashtbl: + kfree(clp->cl_name.data); +err_no_name: + kfree(clp); + return NULL; } static void free_client(struct nfs4_client *clp) { - struct nfsd_net __maybe_unused *nn = net_generic(clp->net, nfsd_net_id); - - lockdep_assert_held(&nn->client_lock); while (!list_empty(&clp->cl_sessions)) { struct nfsd4_session *ses; ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, @@ -1210,18 +1567,32 @@ free_client(struct nfs4_client *clp) } rpc_destroy_wait_queue(&clp->cl_cb_waitq); free_svc_cred(&clp->cl_cred); + kfree(clp->cl_ownerstr_hashtbl); kfree(clp->cl_name.data); idr_destroy(&clp->cl_stateids); kfree(clp); } /* must be called under the client_lock */ -static inline void +static void unhash_client_locked(struct nfs4_client *clp) { + struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); struct nfsd4_session *ses; - list_del(&clp->cl_lru); + lockdep_assert_held(&nn->client_lock); + + /* Mark the client as expired! */ + clp->cl_time = 0; + /* Make it invisible */ + if (!list_empty(&clp->cl_idhash)) { + list_del_init(&clp->cl_idhash); + if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags)) + rb_erase(&clp->cl_namenode, &nn->conf_name_tree); + else + rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); + } + list_del_init(&clp->cl_lru); spin_lock(&clp->cl_lock); list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) list_del_init(&ses->se_hash); @@ -1229,53 +1600,71 @@ unhash_client_locked(struct nfs4_client *clp) } static void -destroy_client(struct nfs4_client *clp) +unhash_client(struct nfs4_client *clp) +{ + struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); + + spin_lock(&nn->client_lock); + unhash_client_locked(clp); + spin_unlock(&nn->client_lock); +} + +static __be32 mark_client_expired_locked(struct nfs4_client *clp) +{ + if (atomic_read(&clp->cl_refcount)) + return nfserr_jukebox; + unhash_client_locked(clp); + return nfs_ok; +} + +static void +__destroy_client(struct nfs4_client *clp) { struct nfs4_openowner *oo; struct nfs4_delegation *dp; struct list_head reaplist; - struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); INIT_LIST_HEAD(&reaplist); spin_lock(&state_lock); while (!list_empty(&clp->cl_delegations)) { dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); - list_del_init(&dp->dl_perclnt); - list_move(&dp->dl_recall_lru, &reaplist); + unhash_delegation_locked(dp); + list_add(&dp->dl_recall_lru, &reaplist); } spin_unlock(&state_lock); while (!list_empty(&reaplist)) { dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); - destroy_delegation(dp); + list_del_init(&dp->dl_recall_lru); + nfs4_put_stid(&dp->dl_stid); } - list_splice_init(&clp->cl_revoked, &reaplist); - while (!list_empty(&reaplist)) { + while (!list_empty(&clp->cl_revoked)) { dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); - destroy_revoked_delegation(dp); + list_del_init(&dp->dl_recall_lru); + nfs4_put_stid(&dp->dl_stid); } while (!list_empty(&clp->cl_openowners)) { oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); + atomic_inc(&oo->oo_owner.so_count); release_openowner(oo); } nfsd4_shutdown_callback(clp); if (clp->cl_cb_conn.cb_xprt) svc_xprt_put(clp->cl_cb_conn.cb_xprt); - list_del(&clp->cl_idhash); - if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags)) - rb_erase(&clp->cl_namenode, &nn->conf_name_tree); - else - rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); - spin_lock(&nn->client_lock); - unhash_client_locked(clp); - WARN_ON_ONCE(atomic_read(&clp->cl_refcount)); free_client(clp); - spin_unlock(&nn->client_lock); +} + +static void +destroy_client(struct nfs4_client *clp) +{ + unhash_client(clp); + __destroy_client(clp); } static void expire_client(struct nfs4_client *clp) { + unhash_client(clp); nfsd4_client_record_remove(clp); - destroy_client(clp); + __destroy_client(clp); } static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) @@ -1408,25 +1797,28 @@ static bool mach_creds_match(struct nfs4_client *cl, struct svc_rqst *rqstp) return 0 == strcmp(cl->cl_cred.cr_principal, cr->cr_principal); } -static void gen_clid(struct nfs4_client *clp, struct nfsd_net *nn) +static void gen_confirm(struct nfs4_client *clp, struct nfsd_net *nn) { - static u32 current_clientid = 1; + __be32 verf[2]; - clp->cl_clientid.cl_boot = nn->boot_time; - clp->cl_clientid.cl_id = current_clientid++; + /* + * This is opaque to client, so no need to byte-swap. Use + * __force to keep sparse happy + */ + verf[0] = (__force __be32)get_seconds(); + verf[1] = (__force __be32)nn->clientid_counter; + memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data)); } -static void gen_confirm(struct nfs4_client *clp) +static void gen_clid(struct nfs4_client *clp, struct nfsd_net *nn) { - __be32 verf[2]; - static u32 i; - - verf[0] = (__be32)get_seconds(); - verf[1] = (__be32)i++; - memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data)); + clp->cl_clientid.cl_boot = nn->boot_time; + clp->cl_clientid.cl_id = nn->clientid_counter++; + gen_confirm(clp, nn); } -static struct nfs4_stid *find_stateid(struct nfs4_client *cl, stateid_t *t) +static struct nfs4_stid * +find_stateid_locked(struct nfs4_client *cl, stateid_t *t) { struct nfs4_stid *ret; @@ -1436,16 +1828,21 @@ static struct nfs4_stid *find_stateid(struct nfs4_client *cl, stateid_t *t) return ret; } -static struct nfs4_stid *find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask) +static struct nfs4_stid * +find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask) { struct nfs4_stid *s; - s = find_stateid(cl, t); - if (!s) - return NULL; - if (typemask & s->sc_type) - return s; - return NULL; + spin_lock(&cl->cl_lock); + s = find_stateid_locked(cl, t); + if (s != NULL) { + if (typemask & s->sc_type) + atomic_inc(&s->sc_count); + else + s = NULL; + } + spin_unlock(&cl->cl_lock); + return s; } static struct nfs4_client *create_client(struct xdr_netobj name, @@ -1455,7 +1852,6 @@ static struct nfs4_client *create_client(struct xdr_netobj name, struct sockaddr *sa = svc_addr(rqstp); int ret; struct net *net = SVC_NET(rqstp); - struct nfsd_net *nn = net_generic(net, nfsd_net_id); clp = alloc_client(name); if (clp == NULL) @@ -1463,17 +1859,14 @@ static struct nfs4_client *create_client(struct xdr_netobj name, ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred); if (ret) { - spin_lock(&nn->client_lock); free_client(clp); - spin_unlock(&nn->client_lock); return NULL; } - nfsd4_init_callback(&clp->cl_cb_null); + INIT_WORK(&clp->cl_cb_null.cb_work, nfsd4_run_cb_null); clp->cl_time = get_seconds(); clear_bit(0, &clp->cl_cb_slot_busy); copy_verf(clp, verf); rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); - gen_confirm(clp); clp->cl_cb_session = NULL; clp->net = net; return clp; @@ -1525,11 +1918,13 @@ add_to_unconfirmed(struct nfs4_client *clp) unsigned int idhashval; struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); + lockdep_assert_held(&nn->client_lock); + clear_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); add_clp_to_name_tree(clp, &nn->unconf_name_tree); idhashval = clientid_hashval(clp->cl_clientid.cl_id); list_add(&clp->cl_idhash, &nn->unconf_id_hashtbl[idhashval]); - renew_client(clp); + renew_client_locked(clp); } static void @@ -1538,12 +1933,14 @@ move_to_confirmed(struct nfs4_client *clp) unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); + lockdep_assert_held(&nn->client_lock); + dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); list_move(&clp->cl_idhash, &nn->conf_id_hashtbl[idhashval]); rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); add_clp_to_name_tree(clp, &nn->conf_name_tree); set_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); - renew_client(clp); + renew_client_locked(clp); } static struct nfs4_client * @@ -1556,7 +1953,7 @@ find_client_in_id_table(struct list_head *tbl, clientid_t *clid, bool sessions) if (same_clid(&clp->cl_clientid, clid)) { if ((bool)clp->cl_minorversion != sessions) return NULL; - renew_client(clp); + renew_client_locked(clp); return clp; } } @@ -1568,6 +1965,7 @@ find_confirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) { struct list_head *tbl = nn->conf_id_hashtbl; + lockdep_assert_held(&nn->client_lock); return find_client_in_id_table(tbl, clid, sessions); } @@ -1576,6 +1974,7 @@ find_unconfirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) { struct list_head *tbl = nn->unconf_id_hashtbl; + lockdep_assert_held(&nn->client_lock); return find_client_in_id_table(tbl, clid, sessions); } @@ -1587,12 +1986,14 @@ static bool clp_used_exchangeid(struct nfs4_client *clp) static struct nfs4_client * find_confirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) { + lockdep_assert_held(&nn->client_lock); return find_clp_in_name_tree(name, &nn->conf_name_tree); } static struct nfs4_client * find_unconfirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) { + lockdep_assert_held(&nn->client_lock); return find_clp_in_name_tree(name, &nn->unconf_name_tree); } @@ -1642,7 +2043,7 @@ out_err: /* * Cache a reply. nfsd4_check_resp_size() has bounded the cache size. */ -void +static void nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) { struct xdr_buf *buf = resp->xdr.buf; @@ -1758,7 +2159,8 @@ nfsd4_exchange_id(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_exchange_id *exid) { - struct nfs4_client *unconf, *conf, *new; + struct nfs4_client *conf, *new; + struct nfs4_client *unconf = NULL; __be32 status; char addr_str[INET6_ADDRSTRLEN]; nfs4_verifier verf = exid->verifier; @@ -1787,8 +2189,12 @@ nfsd4_exchange_id(struct svc_rqst *rqstp, return nfserr_encr_alg_unsupp; } + new = create_client(exid->clname, rqstp, &verf); + if (new == NULL) + return nfserr_jukebox; + /* Cases below refer to rfc 5661 section 18.35.4: */ - nfs4_lock_state(); + spin_lock(&nn->client_lock); conf = find_confirmed_client_by_name(&exid->clname, nn); if (conf) { bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred); @@ -1813,7 +2219,6 @@ nfsd4_exchange_id(struct svc_rqst *rqstp, } /* case 6 */ exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; - new = conf; goto out_copy; } if (!creds_match) { /* case 3 */ @@ -1821,15 +2226,14 @@ nfsd4_exchange_id(struct svc_rqst *rqstp, status = nfserr_clid_inuse; goto out; } - expire_client(conf); goto out_new; } if (verfs_match) { /* case 2 */ conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; - new = conf; goto out_copy; } /* case 5, client reboot */ + conf = NULL; goto out_new; } @@ -1840,33 +2244,38 @@ nfsd4_exchange_id(struct svc_rqst *rqstp, unconf = find_unconfirmed_client_by_name(&exid->clname, nn); if (unconf) /* case 4, possible retry or client restart */ - expire_client(unconf); + unhash_client_locked(unconf); /* case 1 (normal case) */ out_new: - new = create_client(exid->clname, rqstp, &verf); - if (new == NULL) { - status = nfserr_jukebox; - goto out; + if (conf) { + status = mark_client_expired_locked(conf); + if (status) + goto out; } new->cl_minorversion = cstate->minorversion; new->cl_mach_cred = (exid->spa_how == SP4_MACH_CRED); gen_clid(new, nn); add_to_unconfirmed(new); + swap(new, conf); out_copy: - exid->clientid.cl_boot = new->cl_clientid.cl_boot; - exid->clientid.cl_id = new->cl_clientid.cl_id; + exid->clientid.cl_boot = conf->cl_clientid.cl_boot; + exid->clientid.cl_id = conf->cl_clientid.cl_id; - exid->seqid = new->cl_cs_slot.sl_seqid + 1; - nfsd4_set_ex_flags(new, exid); + exid->seqid = conf->cl_cs_slot.sl_seqid + 1; + nfsd4_set_ex_flags(conf, exid); dprintk("nfsd4_exchange_id seqid %d flags %x\n", - new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); + conf->cl_cs_slot.sl_seqid, conf->cl_exchange_flags); status = nfs_ok; out: - nfs4_unlock_state(); + spin_unlock(&nn->client_lock); + if (new) + expire_client(new); + if (unconf) + expire_client(unconf); return status; } @@ -2010,6 +2419,7 @@ nfsd4_create_session(struct svc_rqst *rqstp, { struct sockaddr *sa = svc_addr(rqstp); struct nfs4_client *conf, *unconf; + struct nfs4_client *old = NULL; struct nfsd4_session *new; struct nfsd4_conn *conn; struct nfsd4_clid_slot *cs_slot = NULL; @@ -2035,7 +2445,7 @@ nfsd4_create_session(struct svc_rqst *rqstp, if (!conn) goto out_free_session; - nfs4_lock_state(); + spin_lock(&nn->client_lock); unconf = find_unconfirmed_client(&cr_ses->clientid, true, nn); conf = find_confirmed_client(&cr_ses->clientid, true, nn); WARN_ON_ONCE(conf && unconf); @@ -2054,7 +2464,6 @@ nfsd4_create_session(struct svc_rqst *rqstp, goto out_free_conn; } } else if (unconf) { - struct nfs4_client *old; if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { status = nfserr_clid_inuse; @@ -2072,10 +2481,11 @@ nfsd4_create_session(struct svc_rqst *rqstp, } old = find_confirmed_client_by_name(&unconf->cl_name, nn); if (old) { - status = mark_client_expired(old); - if (status) + status = mark_client_expired_locked(old); + if (status) { + old = NULL; goto out_free_conn; - expire_client(old); + } } move_to_confirmed(unconf); conf = unconf; @@ -2091,20 +2501,27 @@ nfsd4_create_session(struct svc_rqst *rqstp, cr_ses->flags &= ~SESSION4_RDMA; init_session(rqstp, new, conf, cr_ses); - nfsd4_init_conn(rqstp, conn, new); + nfsd4_get_session_locked(new); memcpy(cr_ses->sessionid.data, new->se_sessionid.data, NFS4_MAX_SESSIONID_LEN); cs_slot->sl_seqid++; cr_ses->seqid = cs_slot->sl_seqid; - /* cache solo and embedded create sessions under the state lock */ + /* cache solo and embedded create sessions under the client_lock */ nfsd4_cache_create_session(cr_ses, cs_slot, status); - nfs4_unlock_state(); + spin_unlock(&nn->client_lock); + /* init connection and backchannel */ + nfsd4_init_conn(rqstp, conn, new); + nfsd4_put_session(new); + if (old) + expire_client(old); return status; out_free_conn: - nfs4_unlock_state(); + spin_unlock(&nn->client_lock); free_conn(conn); + if (old) + expire_client(old); out_free_session: __free_session(new); out_release_drc_mem: @@ -2152,17 +2569,16 @@ __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, __be32 status; struct nfsd4_conn *conn; struct nfsd4_session *session; - struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); + struct net *net = SVC_NET(rqstp); + struct nfsd_net *nn = net_generic(net, nfsd_net_id); if (!nfsd4_last_compound_op(rqstp)) return nfserr_not_only_op; - nfs4_lock_state(); spin_lock(&nn->client_lock); - session = find_in_sessionid_hashtbl(&bcts->sessionid, SVC_NET(rqstp)); + session = find_in_sessionid_hashtbl(&bcts->sessionid, net, &status); spin_unlock(&nn->client_lock); - status = nfserr_badsession; if (!session) - goto out; + goto out_no_session; status = nfserr_wrong_cred; if (!mach_creds_match(session->se_client, rqstp)) goto out; @@ -2176,7 +2592,8 @@ __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, nfsd4_init_conn(rqstp, conn, session); status = nfs_ok; out: - nfs4_unlock_state(); + nfsd4_put_session(session); +out_no_session: return status; } @@ -2195,9 +2612,9 @@ nfsd4_destroy_session(struct svc_rqst *r, struct nfsd4_session *ses; __be32 status; int ref_held_by_me = 0; - struct nfsd_net *nn = net_generic(SVC_NET(r), nfsd_net_id); + struct net *net = SVC_NET(r); + struct nfsd_net *nn = net_generic(net, nfsd_net_id); - nfs4_lock_state(); status = nfserr_not_only_op; if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { if (!nfsd4_last_compound_op(r)) @@ -2206,14 +2623,12 @@ nfsd4_destroy_session(struct svc_rqst *r, } dump_sessionid(__func__, &sessionid->sessionid); spin_lock(&nn->client_lock); - ses = find_in_sessionid_hashtbl(&sessionid->sessionid, SVC_NET(r)); - status = nfserr_badsession; + ses = find_in_sessionid_hashtbl(&sessionid->sessionid, net, &status); if (!ses) goto out_client_lock; status = nfserr_wrong_cred; if (!mach_creds_match(ses->se_client, r)) - goto out_client_lock; - nfsd4_get_session_locked(ses); + goto out_put_session; status = mark_session_dead_locked(ses, 1 + ref_held_by_me); if (status) goto out_put_session; @@ -2225,11 +2640,10 @@ nfsd4_destroy_session(struct svc_rqst *r, spin_lock(&nn->client_lock); status = nfs_ok; out_put_session: - nfsd4_put_session(ses); + nfsd4_put_session_locked(ses); out_client_lock: spin_unlock(&nn->client_lock); out: - nfs4_unlock_state(); return status; } @@ -2300,7 +2714,8 @@ nfsd4_sequence(struct svc_rqst *rqstp, struct nfsd4_conn *conn; __be32 status; int buflen; - struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); + struct net *net = SVC_NET(rqstp); + struct nfsd_net *nn = net_generic(net, nfsd_net_id); if (resp->opcnt != 1) return nfserr_sequence_pos; @@ -2314,17 +2729,10 @@ nfsd4_sequence(struct svc_rqst *rqstp, return nfserr_jukebox; spin_lock(&nn->client_lock); - status = nfserr_badsession; - session = find_in_sessionid_hashtbl(&seq->sessionid, SVC_NET(rqstp)); + session = find_in_sessionid_hashtbl(&seq->sessionid, net, &status); if (!session) goto out_no_session; clp = session->se_client; - status = get_client_locked(clp); - if (status) - goto out_no_session; - status = nfsd4_get_session_locked(session); - if (status) - goto out_put_client; status = nfserr_too_many_ops; if (nfsd4_session_too_many_ops(rqstp, session)) @@ -2354,6 +2762,7 @@ nfsd4_sequence(struct svc_rqst *rqstp, goto out_put_session; cstate->slot = slot; cstate->session = session; + cstate->clp = clp; /* Return the cached reply status and set cstate->status * for nfsd4_proc_compound processing */ status = nfsd4_replay_cache_entry(resp, seq); @@ -2388,6 +2797,7 @@ nfsd4_sequence(struct svc_rqst *rqstp, cstate->slot = slot; cstate->session = session; + cstate->clp = clp; out: switch (clp->cl_cb_state) { @@ -2408,31 +2818,48 @@ out_no_session: spin_unlock(&nn->client_lock); return status; out_put_session: - nfsd4_put_session(session); -out_put_client: - put_client_renew_locked(clp); + nfsd4_put_session_locked(session); goto out_no_session; } +void +nfsd4_sequence_done(struct nfsd4_compoundres *resp) +{ + struct nfsd4_compound_state *cs = &resp->cstate; + + if (nfsd4_has_session(cs)) { + if (cs->status != nfserr_replay_cache) { + nfsd4_store_cache_entry(resp); + cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE; + } + /* Drop session reference that was taken in nfsd4_sequence() */ + nfsd4_put_session(cs->session); + } else if (cs->clp) + put_client_renew(cs->clp); +} + __be32 nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_destroy_clientid *dc) { - struct nfs4_client *conf, *unconf, *clp; + struct nfs4_client *conf, *unconf; + struct nfs4_client *clp = NULL; __be32 status = 0; struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); - nfs4_lock_state(); + spin_lock(&nn->client_lock); unconf = find_unconfirmed_client(&dc->clientid, true, nn); conf = find_confirmed_client(&dc->clientid, true, nn); WARN_ON_ONCE(conf && unconf); if (conf) { - clp = conf; - if (client_has_state(conf)) { status = nfserr_clientid_busy; goto out; } + status = mark_client_expired_locked(conf); + if (status) + goto out; + clp = conf; } else if (unconf) clp = unconf; else { @@ -2440,12 +2867,15 @@ nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *csta goto out; } if (!mach_creds_match(clp, rqstp)) { + clp = NULL; status = nfserr_wrong_cred; goto out; } - expire_client(clp); + unhash_client_locked(clp); out: - nfs4_unlock_state(); + spin_unlock(&nn->client_lock); + if (clp) + expire_client(clp); return status; } @@ -2464,7 +2894,6 @@ nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *csta return nfs_ok; } - nfs4_lock_state(); status = nfserr_complete_already; if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, &cstate->session->se_client->cl_flags)) @@ -2484,7 +2913,6 @@ nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *csta status = nfs_ok; nfsd4_client_record_create(cstate->session->se_client); out: - nfs4_unlock_state(); return status; } @@ -2494,12 +2922,16 @@ nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, { struct xdr_netobj clname = setclid->se_name; nfs4_verifier clverifier = setclid->se_verf; - struct nfs4_client *conf, *unconf, *new; + struct nfs4_client *conf, *new; + struct nfs4_client *unconf = NULL; __be32 status; struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); + new = create_client(clname, rqstp, &clverifier); + if (new == NULL) + return nfserr_jukebox; /* Cases below refer to rfc 3530 section 14.2.33: */ - nfs4_lock_state(); + spin_lock(&nn->client_lock); conf = find_confirmed_client_by_name(&clname, nn); if (conf) { /* case 0: */ @@ -2517,11 +2949,7 @@ nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, } unconf = find_unconfirmed_client_by_name(&clname, nn); if (unconf) - expire_client(unconf); - status = nfserr_jukebox; - new = create_client(clname, rqstp, &clverifier); - if (new == NULL) - goto out; + unhash_client_locked(unconf); if (conf && same_verf(&conf->cl_verifier, &clverifier)) /* case 1: probable callback update */ copy_clid(new, conf); @@ -2533,9 +2961,14 @@ nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; setclid->se_clientid.cl_id = new->cl_clientid.cl_id; memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); + new = NULL; status = nfs_ok; out: - nfs4_unlock_state(); + spin_unlock(&nn->client_lock); + if (new) + free_client(new); + if (unconf) + expire_client(unconf); return status; } @@ -2546,6 +2979,7 @@ nfsd4_setclientid_confirm(struct svc_rqst *rqstp, struct nfsd4_setclientid_confirm *setclientid_confirm) { struct nfs4_client *conf, *unconf; + struct nfs4_client *old = NULL; nfs4_verifier confirm = setclientid_confirm->sc_confirm; clientid_t * clid = &setclientid_confirm->sc_clientid; __be32 status; @@ -2553,8 +2987,8 @@ nfsd4_setclientid_confirm(struct svc_rqst *rqstp, if (STALE_CLIENTID(clid, nn)) return nfserr_stale_clientid; - nfs4_lock_state(); + spin_lock(&nn->client_lock); conf = find_confirmed_client(clid, false, nn); unconf = find_unconfirmed_client(clid, false, nn); /* @@ -2578,22 +3012,30 @@ nfsd4_setclientid_confirm(struct svc_rqst *rqstp, } status = nfs_ok; if (conf) { /* case 1: callback update */ + old = unconf; + unhash_client_locked(old); nfsd4_change_callback(conf, &unconf->cl_cb_conn); - nfsd4_probe_callback(conf); - expire_client(unconf); } else { /* case 3: normal case; new or rebooted client */ - conf = find_confirmed_client_by_name(&unconf->cl_name, nn); - if (conf) { - status = mark_client_expired(conf); - if (status) + old = find_confirmed_client_by_name(&unconf->cl_name, nn); + if (old) { + status = mark_client_expired_locked(old); + if (status) { + old = NULL; goto out; - expire_client(conf); + } } move_to_confirmed(unconf); - nfsd4_probe_callback(unconf); + conf = unconf; } + get_client_locked(conf); + spin_unlock(&nn->client_lock); + nfsd4_probe_callback(conf); + spin_lock(&nn->client_lock); + put_client_renew_locked(conf); out: - nfs4_unlock_state(); + spin_unlock(&nn->client_lock); + if (old) + expire_client(old); return status; } @@ -2603,21 +3045,23 @@ static struct nfs4_file *nfsd4_alloc_file(void) } /* OPEN Share state helper functions */ -static void nfsd4_init_file(struct nfs4_file *fp, struct inode *ino) +static void nfsd4_init_file(struct nfs4_file *fp, struct knfsd_fh *fh) { - unsigned int hashval = file_hashval(ino); + unsigned int hashval = file_hashval(fh); + + lockdep_assert_held(&state_lock); atomic_set(&fp->fi_ref, 1); + spin_lock_init(&fp->fi_lock); INIT_LIST_HEAD(&fp->fi_stateids); INIT_LIST_HEAD(&fp->fi_delegations); - fp->fi_inode = igrab(ino); + fh_copy_shallow(&fp->fi_fhandle, fh); fp->fi_had_conflict = false; fp->fi_lease = NULL; + fp->fi_share_deny = 0; memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); memset(fp->fi_access, 0, sizeof(fp->fi_access)); - spin_lock(&state_lock); hlist_add_head(&fp->fi_hash, &file_hashtbl[hashval]); - spin_unlock(&state_lock); } void @@ -2673,6 +3117,28 @@ static void init_nfs4_replay(struct nfs4_replay *rp) rp->rp_status = nfserr_serverfault; rp->rp_buflen = 0; rp->rp_buf = rp->rp_ibuf; + mutex_init(&rp->rp_mutex); +} + +static void nfsd4_cstate_assign_replay(struct nfsd4_compound_state *cstate, + struct nfs4_stateowner *so) +{ + if (!nfsd4_has_session(cstate)) { + mutex_lock(&so->so_replay.rp_mutex); + cstate->replay_owner = so; + atomic_inc(&so->so_count); + } +} + +void nfsd4_cstate_clear_replay(struct nfsd4_compound_state *cstate) +{ + struct nfs4_stateowner *so = cstate->replay_owner; + + if (so != NULL) { + cstate->replay_owner = NULL; + mutex_unlock(&so->so_replay.rp_mutex); + nfs4_put_stateowner(so); + } } static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) @@ -2693,111 +3159,172 @@ static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj INIT_LIST_HEAD(&sop->so_stateids); sop->so_client = clp; init_nfs4_replay(&sop->so_replay); + atomic_set(&sop->so_count, 1); return sop; } static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) { - struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); + lockdep_assert_held(&clp->cl_lock); - list_add(&oo->oo_owner.so_strhash, &nn->ownerstr_hashtbl[strhashval]); + list_add(&oo->oo_owner.so_strhash, + &clp->cl_ownerstr_hashtbl[strhashval]); list_add(&oo->oo_perclient, &clp->cl_openowners); } +static void nfs4_unhash_openowner(struct nfs4_stateowner *so) +{ + unhash_openowner_locked(openowner(so)); +} + +static void nfs4_free_openowner(struct nfs4_stateowner *so) +{ + struct nfs4_openowner *oo = openowner(so); + + kmem_cache_free(openowner_slab, oo); +} + +static const struct nfs4_stateowner_operations openowner_ops = { + .so_unhash = nfs4_unhash_openowner, + .so_free = nfs4_free_openowner, +}; + static struct nfs4_openowner * -alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { - struct nfs4_openowner *oo; +alloc_init_open_stateowner(unsigned int strhashval, struct nfsd4_open *open, + struct nfsd4_compound_state *cstate) +{ + struct nfs4_client *clp = cstate->clp; + struct nfs4_openowner *oo, *ret; oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); if (!oo) return NULL; + oo->oo_owner.so_ops = &openowner_ops; oo->oo_owner.so_is_open_owner = 1; oo->oo_owner.so_seqid = open->op_seqid; - oo->oo_flags = NFS4_OO_NEW; + oo->oo_flags = 0; + if (nfsd4_has_session(cstate)) + oo->oo_flags |= NFS4_OO_CONFIRMED; oo->oo_time = 0; oo->oo_last_closed_stid = NULL; INIT_LIST_HEAD(&oo->oo_close_lru); - hash_openowner(oo, clp, strhashval); + spin_lock(&clp->cl_lock); + ret = find_openstateowner_str_locked(strhashval, open, clp); + if (ret == NULL) { + hash_openowner(oo, clp, strhashval); + ret = oo; + } else + nfs4_free_openowner(&oo->oo_owner); + spin_unlock(&clp->cl_lock); return oo; } static void init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { struct nfs4_openowner *oo = open->op_openowner; + atomic_inc(&stp->st_stid.sc_count); stp->st_stid.sc_type = NFS4_OPEN_STID; - INIT_LIST_HEAD(&stp->st_lockowners); - list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); - list_add(&stp->st_perfile, &fp->fi_stateids); + INIT_LIST_HEAD(&stp->st_locks); stp->st_stateowner = &oo->oo_owner; + atomic_inc(&stp->st_stateowner->so_count); get_nfs4_file(fp); - stp->st_file = fp; + stp->st_stid.sc_file = fp; stp->st_access_bmap = 0; stp->st_deny_bmap = 0; - set_access(open->op_share_access, stp); - set_deny(open->op_share_deny, stp); stp->st_openstp = NULL; + spin_lock(&oo->oo_owner.so_client->cl_lock); + list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); + spin_lock(&fp->fi_lock); + list_add(&stp->st_perfile, &fp->fi_stateids); + spin_unlock(&fp->fi_lock); + spin_unlock(&oo->oo_owner.so_client->cl_lock); } +/* + * In the 4.0 case we need to keep the owners around a little while to handle + * CLOSE replay. We still do need to release any file access that is held by + * them before returning however. + */ static void -move_to_close_lru(struct nfs4_openowner *oo, struct net *net) +move_to_close_lru(struct nfs4_ol_stateid *s, struct net *net) { - struct nfsd_net *nn = net_generic(net, nfsd_net_id); + struct nfs4_ol_stateid *last; + struct nfs4_openowner *oo = openowner(s->st_stateowner); + struct nfsd_net *nn = net_generic(s->st_stid.sc_client->net, + nfsd_net_id); dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); + /* + * We know that we hold one reference via nfsd4_close, and another + * "persistent" reference for the client. If the refcount is higher + * than 2, then there are still calls in progress that are using this + * stateid. We can't put the sc_file reference until they are finished. + * Wait for the refcount to drop to 2. Since it has been unhashed, + * there should be no danger of the refcount going back up again at + * this point. + */ + wait_event(close_wq, atomic_read(&s->st_stid.sc_count) == 2); + + release_all_access(s); + if (s->st_stid.sc_file) { + put_nfs4_file(s->st_stid.sc_file); + s->st_stid.sc_file = NULL; + } + + spin_lock(&nn->client_lock); + last = oo->oo_last_closed_stid; + oo->oo_last_closed_stid = s; list_move_tail(&oo->oo_close_lru, &nn->close_lru); oo->oo_time = get_seconds(); + spin_unlock(&nn->client_lock); + if (last) + nfs4_put_stid(&last->st_stid); } -static int -same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, - clientid_t *clid) +/* search file_hashtbl[] for file */ +static struct nfs4_file * +find_file_locked(struct knfsd_fh *fh) { - return (sop->so_owner.len == owner->len) && - 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && - (sop->so_client->cl_clientid.cl_id == clid->cl_id); -} + unsigned int hashval = file_hashval(fh); + struct nfs4_file *fp; -static struct nfs4_openowner * -find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open, - bool sessions, struct nfsd_net *nn) -{ - struct nfs4_stateowner *so; - struct nfs4_openowner *oo; - struct nfs4_client *clp; + lockdep_assert_held(&state_lock); - list_for_each_entry(so, &nn->ownerstr_hashtbl[hashval], so_strhash) { - if (!so->so_is_open_owner) - continue; - if (same_owner_str(so, &open->op_owner, &open->op_clientid)) { - oo = openowner(so); - clp = oo->oo_owner.so_client; - if ((bool)clp->cl_minorversion != sessions) - return NULL; - renew_client(oo->oo_owner.so_client); - return oo; + hlist_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { + if (nfsd_fh_match(&fp->fi_fhandle, fh)) { + get_nfs4_file(fp); + return fp; } } return NULL; } -/* search file_hashtbl[] for file */ static struct nfs4_file * -find_file(struct inode *ino) +find_file(struct knfsd_fh *fh) { - unsigned int hashval = file_hashval(ino); struct nfs4_file *fp; spin_lock(&state_lock); - hlist_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { - if (fp->fi_inode == ino) { - get_nfs4_file(fp); - spin_unlock(&state_lock); - return fp; - } + fp = find_file_locked(fh); + spin_unlock(&state_lock); + return fp; +} + +static struct nfs4_file * +find_or_add_file(struct nfs4_file *new, struct knfsd_fh *fh) +{ + struct nfs4_file *fp; + + spin_lock(&state_lock); + fp = find_file_locked(fh); + if (fp == NULL) { + nfsd4_init_file(new, fh); + fp = new; } spin_unlock(&state_lock); - return NULL; + + return fp; } /* @@ -2807,47 +3334,53 @@ find_file(struct inode *ino) static __be32 nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) { - struct inode *ino = current_fh->fh_dentry->d_inode; struct nfs4_file *fp; - struct nfs4_ol_stateid *stp; - __be32 ret; + __be32 ret = nfs_ok; - fp = find_file(ino); + fp = find_file(¤t_fh->fh_handle); if (!fp) - return nfs_ok; - ret = nfserr_locked; - /* Search for conflicting share reservations */ - list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { - if (test_deny(deny_type, stp) || - test_deny(NFS4_SHARE_DENY_BOTH, stp)) - goto out; - } - ret = nfs_ok; -out: + return ret; + /* Check for conflicting share reservations */ + spin_lock(&fp->fi_lock); + if (fp->fi_share_deny & deny_type) + ret = nfserr_locked; + spin_unlock(&fp->fi_lock); put_nfs4_file(fp); return ret; } -static void nfsd_break_one_deleg(struct nfs4_delegation *dp) +void nfsd4_prepare_cb_recall(struct nfs4_delegation *dp) { - struct nfs4_client *clp = dp->dl_stid.sc_client; - struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); + struct nfsd_net *nn = net_generic(dp->dl_stid.sc_client->net, + nfsd_net_id); - lockdep_assert_held(&state_lock); - /* We're assuming the state code never drops its reference + block_delegations(&dp->dl_stid.sc_file->fi_fhandle); + + /* + * We can't do this in nfsd_break_deleg_cb because it is + * already holding inode->i_lock. + * + * If the dl_time != 0, then we know that it has already been + * queued for a lease break. Don't queue it again. + */ + spin_lock(&state_lock); + if (dp->dl_time == 0) { + dp->dl_time = get_seconds(); + list_add_tail(&dp->dl_recall_lru, &nn->del_recall_lru); + } + spin_unlock(&state_lock); +} + +static void nfsd_break_one_deleg(struct nfs4_delegation *dp) +{ + /* + * We're assuming the state code never drops its reference * without first removing the lease. Since we're in this lease * callback (and since the lease code is serialized by the kernel * lock) we know the server hasn't removed the lease yet, we know - * it's safe to take a reference: */ - atomic_inc(&dp->dl_count); - - list_add_tail(&dp->dl_recall_lru, &nn->del_recall_lru); - - /* Only place dl_time is set; protected by i_lock: */ - dp->dl_time = get_seconds(); - - block_delegations(&dp->dl_fh); - + * it's safe to take a reference. + */ + atomic_inc(&dp->dl_stid.sc_count); nfsd4_cb_recall(dp); } @@ -2872,11 +3405,20 @@ static void nfsd_break_deleg_cb(struct file_lock *fl) */ fl->fl_break_time = 0; - spin_lock(&state_lock); + spin_lock(&fp->fi_lock); fp->fi_had_conflict = true; - list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) - nfsd_break_one_deleg(dp); - spin_unlock(&state_lock); + /* + * If there are no delegations on the list, then we can't count on this + * lease ever being cleaned up. Set the fl_break_time to jiffies so that + * time_out_leases will do it ASAP. The fact that fi_had_conflict is now + * true should keep any new delegations from being hashed. + */ + if (list_empty(&fp->fi_delegations)) + fl->fl_break_time = jiffies; + else + list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) + nfsd_break_one_deleg(dp); + spin_unlock(&fp->fi_lock); } static @@ -2904,6 +3446,42 @@ static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4 return nfserr_bad_seqid; } +static __be32 lookup_clientid(clientid_t *clid, + struct nfsd4_compound_state *cstate, + struct nfsd_net *nn) +{ + struct nfs4_client *found; + + if (cstate->clp) { + found = cstate->clp; + if (!same_clid(&found->cl_clientid, clid)) + return nfserr_stale_clientid; + return nfs_ok; + } + + if (STALE_CLIENTID(clid, nn)) + return nfserr_stale_clientid; + + /* + * For v4.1+ we get the client in the SEQUENCE op. If we don't have one + * cached already then we know this is for is for v4.0 and "sessions" + * will be false. + */ + WARN_ON_ONCE(cstate->session); + spin_lock(&nn->client_lock); + found = find_confirmed_client(clid, false, nn); + if (!found) { + spin_unlock(&nn->client_lock); + return nfserr_expired; + } + atomic_inc(&found->cl_refcount); + spin_unlock(&nn->client_lock); + + /* Cache the nfs4_client in cstate! */ + cstate->clp = found; + return nfs_ok; +} + __be32 nfsd4_process_open1(struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct nfsd_net *nn) @@ -2924,19 +3502,19 @@ nfsd4_process_open1(struct nfsd4_compound_state *cstate, if (open->op_file == NULL) return nfserr_jukebox; - strhashval = ownerstr_hashval(clientid->cl_id, &open->op_owner); - oo = find_openstateowner_str(strhashval, open, cstate->minorversion, nn); + status = lookup_clientid(clientid, cstate, nn); + if (status) + return status; + clp = cstate->clp; + + strhashval = ownerstr_hashval(&open->op_owner); + oo = find_openstateowner_str(strhashval, open, clp); open->op_openowner = oo; if (!oo) { - clp = find_confirmed_client(clientid, cstate->minorversion, - nn); - if (clp == NULL) - return nfserr_expired; goto new_owner; } if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { /* Replace unconfirmed owners without checking for replay. */ - clp = oo->oo_owner.so_client; release_openowner(oo); open->op_openowner = NULL; goto new_owner; @@ -2944,15 +3522,14 @@ nfsd4_process_open1(struct nfsd4_compound_state *cstate, status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); if (status) return status; - clp = oo->oo_owner.so_client; goto alloc_stateid; new_owner: - oo = alloc_init_open_stateowner(strhashval, clp, open); + oo = alloc_init_open_stateowner(strhashval, open, cstate); if (oo == NULL) return nfserr_jukebox; open->op_openowner = oo; alloc_stateid: - open->op_stp = nfs4_alloc_stateid(clp); + open->op_stp = nfs4_alloc_open_stateid(clp); if (!open->op_stp) return nfserr_jukebox; return nfs_ok; @@ -2994,14 +3571,18 @@ nfs4_check_deleg(struct nfs4_client *cl, struct nfsd4_open *open, { int flags; __be32 status = nfserr_bad_stateid; + struct nfs4_delegation *deleg; - *dp = find_deleg_stateid(cl, &open->op_delegate_stateid); - if (*dp == NULL) + deleg = find_deleg_stateid(cl, &open->op_delegate_stateid); + if (deleg == NULL) goto out; flags = share_access_to_flags(open->op_share_access); - status = nfs4_check_delegmode(*dp, flags); - if (status) - *dp = NULL; + status = nfs4_check_delegmode(deleg, flags); + if (status) { + nfs4_put_stid(&deleg->dl_stid); + goto out; + } + *dp = deleg; out: if (!nfsd4_is_deleg_cur(open)) return nfs_ok; @@ -3011,24 +3592,25 @@ out: return nfs_ok; } -static __be32 -nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_ol_stateid **stpp) +static struct nfs4_ol_stateid * +nfsd4_find_existing_open(struct nfs4_file *fp, struct nfsd4_open *open) { - struct nfs4_ol_stateid *local; + struct nfs4_ol_stateid *local, *ret = NULL; struct nfs4_openowner *oo = open->op_openowner; + spin_lock(&fp->fi_lock); list_for_each_entry(local, &fp->fi_stateids, st_perfile) { /* ignore lock owners */ if (local->st_stateowner->so_is_open_owner == 0) continue; - /* remember if we have seen this open owner */ - if (local->st_stateowner == &oo->oo_owner) - *stpp = local; - /* check for conflicting share reservations */ - if (!test_share(local, open)) - return nfserr_share_denied; + if (local->st_stateowner == &oo->oo_owner) { + ret = local; + atomic_inc(&ret->st_stid.sc_count); + break; + } } - return nfs_ok; + spin_unlock(&fp->fi_lock); + return ret; } static inline int nfs4_access_to_access(u32 nfs4_access) @@ -3042,24 +3624,6 @@ static inline int nfs4_access_to_access(u32 nfs4_access) return flags; } -static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, - struct svc_fh *cur_fh, struct nfsd4_open *open) -{ - __be32 status; - int oflag = nfs4_access_to_omode(open->op_share_access); - int access = nfs4_access_to_access(open->op_share_access); - - if (!fp->fi_fds[oflag]) { - status = nfsd_open(rqstp, cur_fh, S_IFREG, access, - &fp->fi_fds[oflag]); - if (status) - return status; - } - nfs4_file_get_access(fp, oflag); - - return nfs_ok; -} - static inline __be32 nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, struct nfsd4_open *open) @@ -3075,34 +3639,99 @@ nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); } -static __be32 -nfs4_upgrade_open(struct svc_rqst *rqstp, struct nfs4_file *fp, struct svc_fh *cur_fh, struct nfs4_ol_stateid *stp, struct nfsd4_open *open) +static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, + struct svc_fh *cur_fh, struct nfs4_ol_stateid *stp, + struct nfsd4_open *open) { - u32 op_share_access = open->op_share_access; - bool new_access; + struct file *filp = NULL; __be32 status; + int oflag = nfs4_access_to_omode(open->op_share_access); + int access = nfs4_access_to_access(open->op_share_access); + unsigned char old_access_bmap, old_deny_bmap; - new_access = !test_access(op_share_access, stp); - if (new_access) { - status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); - if (status) - return status; + spin_lock(&fp->fi_lock); + + /* + * Are we trying to set a deny mode that would conflict with + * current access? + */ + status = nfs4_file_check_deny(fp, open->op_share_deny); + if (status != nfs_ok) { + spin_unlock(&fp->fi_lock); + goto out; } - status = nfsd4_truncate(rqstp, cur_fh, open); - if (status) { - if (new_access) { - int oflag = nfs4_access_to_omode(op_share_access); - nfs4_file_put_access(fp, oflag); - } - return status; + + /* set access to the file */ + status = nfs4_file_get_access(fp, open->op_share_access); + if (status != nfs_ok) { + spin_unlock(&fp->fi_lock); + goto out; } - /* remember the open */ - set_access(op_share_access, stp); + + /* Set access bits in stateid */ + old_access_bmap = stp->st_access_bmap; + set_access(open->op_share_access, stp); + + /* Set new deny mask */ + old_deny_bmap = stp->st_deny_bmap; set_deny(open->op_share_deny, stp); + fp->fi_share_deny |= (open->op_share_deny & NFS4_SHARE_DENY_BOTH); - return nfs_ok; + if (!fp->fi_fds[oflag]) { + spin_unlock(&fp->fi_lock); + status = nfsd_open(rqstp, cur_fh, S_IFREG, access, &filp); + if (status) + goto out_put_access; + spin_lock(&fp->fi_lock); + if (!fp->fi_fds[oflag]) { + fp->fi_fds[oflag] = filp; + filp = NULL; + } + } + spin_unlock(&fp->fi_lock); + if (filp) + fput(filp); + + status = nfsd4_truncate(rqstp, cur_fh, open); + if (status) + goto out_put_access; +out: + return status; +out_put_access: + stp->st_access_bmap = old_access_bmap; + nfs4_file_put_access(fp, open->op_share_access); + reset_union_bmap_deny(bmap_to_share_mode(old_deny_bmap), stp); + goto out; } +static __be32 +nfs4_upgrade_open(struct svc_rqst *rqstp, struct nfs4_file *fp, struct svc_fh *cur_fh, struct nfs4_ol_stateid *stp, struct nfsd4_open *open) +{ + __be32 status; + unsigned char old_deny_bmap; + + if (!test_access(open->op_share_access, stp)) + return nfs4_get_vfs_file(rqstp, fp, cur_fh, stp, open); + + /* test and set deny mode */ + spin_lock(&fp->fi_lock); + status = nfs4_file_check_deny(fp, open->op_share_deny); + if (status == nfs_ok) { + old_deny_bmap = stp->st_deny_bmap; + set_deny(open->op_share_deny, stp); + fp->fi_share_deny |= + (open->op_share_deny & NFS4_SHARE_DENY_BOTH); + } + spin_unlock(&fp->fi_lock); + + if (status != nfs_ok) + return status; + + status = nfsd4_truncate(rqstp, cur_fh, open); + if (status != nfs_ok) + reset_union_bmap_deny(old_deny_bmap, stp); + return status; +} static void nfs4_set_claim_prev(struct nfsd4_open *open, bool has_session) @@ -3123,7 +3752,7 @@ static bool nfsd4_cb_channel_good(struct nfs4_client *clp) return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; } -static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int flag) +static struct file_lock *nfs4_alloc_init_lease(struct nfs4_file *fp, int flag) { struct file_lock *fl; @@ -3135,53 +3764,101 @@ static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int f fl->fl_flags = FL_DELEG; fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; fl->fl_end = OFFSET_MAX; - fl->fl_owner = (fl_owner_t)(dp->dl_file); + fl->fl_owner = (fl_owner_t)fp; fl->fl_pid = current->tgid; return fl; } static int nfs4_setlease(struct nfs4_delegation *dp) { - struct nfs4_file *fp = dp->dl_file; + struct nfs4_file *fp = dp->dl_stid.sc_file; struct file_lock *fl; - int status; + struct file *filp; + int status = 0; - fl = nfs4_alloc_init_lease(dp, NFS4_OPEN_DELEGATE_READ); + fl = nfs4_alloc_init_lease(fp, NFS4_OPEN_DELEGATE_READ); if (!fl) return -ENOMEM; - fl->fl_file = find_readable_file(fp); - status = vfs_setlease(fl->fl_file, fl->fl_type, &fl); - if (status) - goto out_free; + filp = find_readable_file(fp); + if (!filp) { + /* We should always have a readable file here */ + WARN_ON_ONCE(1); + return -EBADF; + } + fl->fl_file = filp; + status = vfs_setlease(filp, fl->fl_type, &fl); + if (status) { + locks_free_lock(fl); + goto out_fput; + } + spin_lock(&state_lock); + spin_lock(&fp->fi_lock); + /* Did the lease get broken before we took the lock? */ + status = -EAGAIN; + if (fp->fi_had_conflict) + goto out_unlock; + /* Race breaker */ + if (fp->fi_lease) { + status = 0; + atomic_inc(&fp->fi_delegees); + hash_delegation_locked(dp, fp); + goto out_unlock; + } fp->fi_lease = fl; - fp->fi_deleg_file = get_file(fl->fl_file); + fp->fi_deleg_file = filp; atomic_set(&fp->fi_delegees, 1); - spin_lock(&state_lock); hash_delegation_locked(dp, fp); + spin_unlock(&fp->fi_lock); spin_unlock(&state_lock); return 0; -out_free: - locks_free_lock(fl); +out_unlock: + spin_unlock(&fp->fi_lock); + spin_unlock(&state_lock); +out_fput: + fput(filp); return status; } -static int nfs4_set_delegation(struct nfs4_delegation *dp, struct nfs4_file *fp) +static struct nfs4_delegation * +nfs4_set_delegation(struct nfs4_client *clp, struct svc_fh *fh, + struct nfs4_file *fp) { + int status; + struct nfs4_delegation *dp; + if (fp->fi_had_conflict) - return -EAGAIN; + return ERR_PTR(-EAGAIN); + + dp = alloc_init_deleg(clp, fh); + if (!dp) + return ERR_PTR(-ENOMEM); + get_nfs4_file(fp); - dp->dl_file = fp; - if (!fp->fi_lease) - return nfs4_setlease(dp); spin_lock(&state_lock); + spin_lock(&fp->fi_lock); + dp->dl_stid.sc_file = fp; + if (!fp->fi_lease) { + spin_unlock(&fp->fi_lock); + spin_unlock(&state_lock); + status = nfs4_setlease(dp); + goto out; + } atomic_inc(&fp->fi_delegees); if (fp->fi_had_conflict) { - spin_unlock(&state_lock); - return -EAGAIN; + status = -EAGAIN; + goto out_unlock; } hash_delegation_locked(dp, fp); + status = 0; +out_unlock: + spin_unlock(&fp->fi_lock); spin_unlock(&state_lock); - return 0; +out: + if (status) { + nfs4_put_stid(&dp->dl_stid); + return ERR_PTR(status); + } + return dp; } static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status) @@ -3212,11 +3889,12 @@ static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status) * proper support for them. */ static void -nfs4_open_delegation(struct net *net, struct svc_fh *fh, - struct nfsd4_open *open, struct nfs4_ol_stateid *stp) +nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, + struct nfs4_ol_stateid *stp) { struct nfs4_delegation *dp; - struct nfs4_openowner *oo = container_of(stp->st_stateowner, struct nfs4_openowner, oo_owner); + struct nfs4_openowner *oo = openowner(stp->st_stateowner); + struct nfs4_client *clp = stp->st_stid.sc_client; int cb_up; int status = 0; @@ -3235,7 +3913,7 @@ nfs4_open_delegation(struct net *net, struct svc_fh *fh, * Let's not give out any delegations till everyone's * had the chance to reclaim theirs.... */ - if (locks_in_grace(net)) + if (locks_in_grace(clp->net)) goto out_no_deleg; if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) goto out_no_deleg; @@ -3254,21 +3932,17 @@ nfs4_open_delegation(struct net *net, struct svc_fh *fh, default: goto out_no_deleg; } - dp = alloc_init_deleg(oo->oo_owner.so_client, stp, fh); - if (dp == NULL) + dp = nfs4_set_delegation(clp, fh, stp->st_stid.sc_file); + if (IS_ERR(dp)) goto out_no_deleg; - status = nfs4_set_delegation(dp, stp->st_file); - if (status) - goto out_free; memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", STATEID_VAL(&dp->dl_stid.sc_stateid)); open->op_delegate_type = NFS4_OPEN_DELEGATE_READ; + nfs4_put_stid(&dp->dl_stid); return; -out_free: - destroy_delegation(dp); out_no_deleg: open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE; if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS && @@ -3301,16 +3975,12 @@ static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open, */ } -/* - * called with nfs4_lock_state() held. - */ __be32 nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) { struct nfsd4_compoundres *resp = rqstp->rq_resp; struct nfs4_client *cl = open->op_openowner->oo_owner.so_client; struct nfs4_file *fp = NULL; - struct inode *ino = current_fh->fh_dentry->d_inode; struct nfs4_ol_stateid *stp = NULL; struct nfs4_delegation *dp = NULL; __be32 status; @@ -3320,21 +3990,18 @@ nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nf * and check for delegations in the process of being recalled. * If not found, create the nfs4_file struct */ - fp = find_file(ino); - if (fp) { - if ((status = nfs4_check_open(fp, open, &stp))) - goto out; + fp = find_or_add_file(open->op_file, ¤t_fh->fh_handle); + if (fp != open->op_file) { status = nfs4_check_deleg(cl, open, &dp); if (status) goto out; + stp = nfsd4_find_existing_open(fp, open); } else { + open->op_file = NULL; status = nfserr_bad_stateid; if (nfsd4_is_deleg_cur(open)) goto out; status = nfserr_jukebox; - fp = open->op_file; - open->op_file = NULL; - nfsd4_init_file(fp, ino); } /* @@ -3347,22 +4014,19 @@ nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nf if (status) goto out; } else { - status = nfs4_get_vfs_file(rqstp, fp, current_fh, open); - if (status) - goto out; - status = nfsd4_truncate(rqstp, current_fh, open); - if (status) - goto out; stp = open->op_stp; open->op_stp = NULL; init_open_stateid(stp, fp, open); + status = nfs4_get_vfs_file(rqstp, fp, current_fh, stp, open); + if (status) { + release_open_stateid(stp); + goto out; + } } update_stateid(&stp->st_stid.sc_stateid); memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); if (nfsd4_has_session(&resp->cstate)) { - open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; - if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) { open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; open->op_why_no_deleg = WND4_NOT_WANTED; @@ -3374,7 +4038,7 @@ nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nf * Attempt to hand out a delegation. No error return, because the * OPEN succeeds even if we fail. */ - nfs4_open_delegation(SVC_NET(rqstp), current_fh, open, stp); + nfs4_open_delegation(current_fh, open, stp); nodeleg: status = nfs_ok; @@ -3397,41 +4061,27 @@ out: if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED) && !nfsd4_has_session(&resp->cstate)) open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; + if (dp) + nfs4_put_stid(&dp->dl_stid); + if (stp) + nfs4_put_stid(&stp->st_stid); return status; } -void nfsd4_cleanup_open_state(struct nfsd4_open *open, __be32 status) +void nfsd4_cleanup_open_state(struct nfsd4_compound_state *cstate, + struct nfsd4_open *open, __be32 status) { if (open->op_openowner) { - struct nfs4_openowner *oo = open->op_openowner; + struct nfs4_stateowner *so = &open->op_openowner->oo_owner; - if (!list_empty(&oo->oo_owner.so_stateids)) - list_del_init(&oo->oo_close_lru); - if (oo->oo_flags & NFS4_OO_NEW) { - if (status) { - release_openowner(oo); - open->op_openowner = NULL; - } else - oo->oo_flags &= ~NFS4_OO_NEW; - } + nfsd4_cstate_assign_replay(cstate, so); + nfs4_put_stateowner(so); } if (open->op_file) nfsd4_free_file(open->op_file); if (open->op_stp) - free_generic_stateid(open->op_stp); -} - -static __be32 lookup_clientid(clientid_t *clid, bool session, struct nfsd_net *nn, struct nfs4_client **clp) -{ - struct nfs4_client *found; - - if (STALE_CLIENTID(clid, nn)) - return nfserr_stale_clientid; - found = find_confirmed_client(clid, session, nn); - if (clp) - *clp = found; - return found ? nfs_ok : nfserr_expired; + nfs4_put_stid(&open->op_stp->st_stid); } __be32 @@ -3442,19 +4092,18 @@ nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, __be32 status; struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); - nfs4_lock_state(); dprintk("process_renew(%08x/%08x): starting\n", clid->cl_boot, clid->cl_id); - status = lookup_clientid(clid, cstate->minorversion, nn, &clp); + status = lookup_clientid(clid, cstate, nn); if (status) goto out; + clp = cstate->clp; status = nfserr_cb_path_down; if (!list_empty(&clp->cl_delegations) && clp->cl_cb_state != NFSD4_CB_UP) goto out; status = nfs_ok; out: - nfs4_unlock_state(); return status; } @@ -3483,12 +4132,11 @@ nfs4_laundromat(struct nfsd_net *nn) struct nfs4_client *clp; struct nfs4_openowner *oo; struct nfs4_delegation *dp; + struct nfs4_ol_stateid *stp; struct list_head *pos, *next, reaplist; time_t cutoff = get_seconds() - nn->nfsd4_lease; time_t t, new_timeo = nn->nfsd4_lease; - nfs4_lock_state(); - dprintk("NFSD: laundromat service - starting\n"); nfsd4_end_grace(nn); INIT_LIST_HEAD(&reaplist); @@ -3505,13 +4153,14 @@ nfs4_laundromat(struct nfsd_net *nn) clp->cl_clientid.cl_id); continue; } - list_move(&clp->cl_lru, &reaplist); + list_add(&clp->cl_lru, &reaplist); } spin_unlock(&nn->client_lock); list_for_each_safe(pos, next, &reaplist) { clp = list_entry(pos, struct nfs4_client, cl_lru); dprintk("NFSD: purging unused client (clientid %08x)\n", clp->cl_clientid.cl_id); + list_del_init(&clp->cl_lru); expire_client(clp); } spin_lock(&state_lock); @@ -3524,24 +4173,37 @@ nfs4_laundromat(struct nfsd_net *nn) new_timeo = min(new_timeo, t); break; } - list_move(&dp->dl_recall_lru, &reaplist); + unhash_delegation_locked(dp); + list_add(&dp->dl_recall_lru, &reaplist); } spin_unlock(&state_lock); - list_for_each_safe(pos, next, &reaplist) { - dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); + while (!list_empty(&reaplist)) { + dp = list_first_entry(&reaplist, struct nfs4_delegation, + dl_recall_lru); + list_del_init(&dp->dl_recall_lru); revoke_delegation(dp); } - list_for_each_safe(pos, next, &nn->close_lru) { - oo = container_of(pos, struct nfs4_openowner, oo_close_lru); - if (time_after((unsigned long)oo->oo_time, (unsigned long)cutoff)) { + + spin_lock(&nn->client_lock); + while (!list_empty(&nn->close_lru)) { + oo = list_first_entry(&nn->close_lru, struct nfs4_openowner, + oo_close_lru); + if (time_after((unsigned long)oo->oo_time, + (unsigned long)cutoff)) { t = oo->oo_time - cutoff; new_timeo = min(new_timeo, t); break; } - release_openowner(oo); + list_del_init(&oo->oo_close_lru); + stp = oo->oo_last_closed_stid; + oo->oo_last_closed_stid = NULL; + spin_unlock(&nn->client_lock); + nfs4_put_stid(&stp->st_stid); + spin_lock(&nn->client_lock); } + spin_unlock(&nn->client_lock); + new_timeo = max_t(time_t, new_timeo, NFSD_LAUNDROMAT_MINTIMEOUT); - nfs4_unlock_state(); return new_timeo; } @@ -3564,7 +4226,7 @@ laundromat_main(struct work_struct *laundry) static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_ol_stateid *stp) { - if (fhp->fh_dentry->d_inode != stp->st_file->fi_inode) + if (!nfsd_fh_match(&fhp->fh_handle, &stp->st_stid.sc_file->fi_fhandle)) return nfserr_bad_stateid; return nfs_ok; } @@ -3666,10 +4328,10 @@ static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid) { struct nfs4_stid *s; struct nfs4_ol_stateid *ols; - __be32 status; + __be32 status = nfserr_bad_stateid; if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) - return nfserr_bad_stateid; + return status; /* Client debugging aid. */ if (!same_clid(&stateid->si_opaque.so_clid, &cl->cl_clientid)) { char addr_str[INET6_ADDRSTRLEN]; @@ -3677,53 +4339,62 @@ static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid) sizeof(addr_str)); pr_warn_ratelimited("NFSD: client %s testing state ID " "with incorrect client ID\n", addr_str); - return nfserr_bad_stateid; + return status; } - s = find_stateid(cl, stateid); + spin_lock(&cl->cl_lock); + s = find_stateid_locked(cl, stateid); if (!s) - return nfserr_bad_stateid; + goto out_unlock; status = check_stateid_generation(stateid, &s->sc_stateid, 1); if (status) - return status; + goto out_unlock; switch (s->sc_type) { case NFS4_DELEG_STID: - return nfs_ok; + status = nfs_ok; + break; case NFS4_REVOKED_DELEG_STID: - return nfserr_deleg_revoked; + status = nfserr_deleg_revoked; + break; case NFS4_OPEN_STID: case NFS4_LOCK_STID: ols = openlockstateid(s); if (ols->st_stateowner->so_is_open_owner && !(openowner(ols->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) - return nfserr_bad_stateid; - return nfs_ok; + status = nfserr_bad_stateid; + else + status = nfs_ok; + break; default: printk("unknown stateid type %x\n", s->sc_type); + /* Fallthrough */ case NFS4_CLOSED_STID: - return nfserr_bad_stateid; + case NFS4_CLOSED_DELEG_STID: + status = nfserr_bad_stateid; } +out_unlock: + spin_unlock(&cl->cl_lock); + return status; } -static __be32 nfsd4_lookup_stateid(stateid_t *stateid, unsigned char typemask, - struct nfs4_stid **s, bool sessions, - struct nfsd_net *nn) +static __be32 +nfsd4_lookup_stateid(struct nfsd4_compound_state *cstate, + stateid_t *stateid, unsigned char typemask, + struct nfs4_stid **s, struct nfsd_net *nn) { - struct nfs4_client *cl; __be32 status; if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) return nfserr_bad_stateid; - status = lookup_clientid(&stateid->si_opaque.so_clid, sessions, - nn, &cl); + status = lookup_clientid(&stateid->si_opaque.so_clid, cstate, nn); if (status == nfserr_stale_clientid) { - if (sessions) + if (cstate->session) return nfserr_bad_stateid; return nfserr_stale_stateid; } if (status) return status; - *s = find_stateid_by_type(cl, stateid, typemask); + *s = find_stateid_by_type(cstate->clp, stateid, typemask); if (!*s) return nfserr_bad_stateid; return nfs_ok; @@ -3754,12 +4425,11 @@ nfs4_preprocess_stateid_op(struct net *net, struct nfsd4_compound_state *cstate, if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) return check_special_stateids(net, current_fh, stateid, flags); - nfs4_lock_state(); - - status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, - &s, cstate->minorversion, nn); + status = nfsd4_lookup_stateid(cstate, stateid, + NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, + &s, nn); if (status) - goto out; + return status; status = check_stateid_generation(stateid, &s->sc_stateid, nfsd4_has_session(cstate)); if (status) goto out; @@ -3770,12 +4440,13 @@ nfs4_preprocess_stateid_op(struct net *net, struct nfsd4_compound_state *cstate, if (status) goto out; if (filpp) { - file = dp->dl_file->fi_deleg_file; + file = dp->dl_stid.sc_file->fi_deleg_file; if (!file) { WARN_ON_ONCE(1); status = nfserr_serverfault; goto out; } + get_file(file); } break; case NFS4_OPEN_STID: @@ -3791,10 +4462,12 @@ nfs4_preprocess_stateid_op(struct net *net, struct nfsd4_compound_state *cstate, if (status) goto out; if (filpp) { + struct nfs4_file *fp = stp->st_stid.sc_file; + if (flags & RD_STATE) - file = find_readable_file(stp->st_file); + file = find_readable_file(fp); else - file = find_writeable_file(stp->st_file); + file = find_writeable_file(fp); } break; default: @@ -3803,28 +4476,12 @@ nfs4_preprocess_stateid_op(struct net *net, struct nfsd4_compound_state *cstate, } status = nfs_ok; if (file) - *filpp = get_file(file); + *filpp = file; out: - nfs4_unlock_state(); + nfs4_put_stid(s); return status; } -static __be32 -nfsd4_free_lock_stateid(struct nfs4_ol_stateid *stp) -{ - struct nfs4_lockowner *lo = lockowner(stp->st_stateowner); - - if (check_for_locks(stp->st_file, lo)) - return nfserr_locks_held; - /* - * Currently there's a 1-1 lock stateid<->lockowner - * correspondance, and we have to delete the lockowner when we - * delete the lock stateid: - */ - release_lockowner(lo); - return nfs_ok; -} - /* * Test if the stateid is valid */ @@ -3835,11 +4492,9 @@ nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_test_stateid_id *stateid; struct nfs4_client *cl = cstate->session->se_client; - nfs4_lock_state(); list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list) stateid->ts_id_status = nfsd4_validate_stateid(cl, &stateid->ts_id_stateid); - nfs4_unlock_state(); return nfs_ok; } @@ -3851,37 +4506,50 @@ nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, stateid_t *stateid = &free_stateid->fr_stateid; struct nfs4_stid *s; struct nfs4_delegation *dp; + struct nfs4_ol_stateid *stp; struct nfs4_client *cl = cstate->session->se_client; __be32 ret = nfserr_bad_stateid; - nfs4_lock_state(); - s = find_stateid(cl, stateid); + spin_lock(&cl->cl_lock); + s = find_stateid_locked(cl, stateid); if (!s) - goto out; + goto out_unlock; switch (s->sc_type) { case NFS4_DELEG_STID: ret = nfserr_locks_held; - goto out; + break; case NFS4_OPEN_STID: - case NFS4_LOCK_STID: ret = check_stateid_generation(stateid, &s->sc_stateid, 1); if (ret) - goto out; - if (s->sc_type == NFS4_LOCK_STID) - ret = nfsd4_free_lock_stateid(openlockstateid(s)); - else - ret = nfserr_locks_held; + break; + ret = nfserr_locks_held; break; + case NFS4_LOCK_STID: + ret = check_stateid_generation(stateid, &s->sc_stateid, 1); + if (ret) + break; + stp = openlockstateid(s); + ret = nfserr_locks_held; + if (check_for_locks(stp->st_stid.sc_file, + lockowner(stp->st_stateowner))) + break; + unhash_lock_stateid(stp); + spin_unlock(&cl->cl_lock); + nfs4_put_stid(s); + ret = nfs_ok; + goto out; case NFS4_REVOKED_DELEG_STID: dp = delegstateid(s); - destroy_revoked_delegation(dp); + list_del_init(&dp->dl_recall_lru); + spin_unlock(&cl->cl_lock); + nfs4_put_stid(s); ret = nfs_ok; - break; - default: - ret = nfserr_bad_stateid; + goto out; + /* Default falls through and returns nfserr_bad_stateid */ } +out_unlock: + spin_unlock(&cl->cl_lock); out: - nfs4_unlock_state(); return ret; } @@ -3926,20 +4594,24 @@ nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, { __be32 status; struct nfs4_stid *s; + struct nfs4_ol_stateid *stp = NULL; dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, seqid, STATEID_VAL(stateid)); *stpp = NULL; - status = nfsd4_lookup_stateid(stateid, typemask, &s, - cstate->minorversion, nn); + status = nfsd4_lookup_stateid(cstate, stateid, typemask, &s, nn); if (status) return status; - *stpp = openlockstateid(s); - if (!nfsd4_has_session(cstate)) - cstate->replay_owner = (*stpp)->st_stateowner; + stp = openlockstateid(s); + nfsd4_cstate_assign_replay(cstate, stp->st_stateowner); - return nfs4_seqid_op_checks(cstate, stateid, seqid, *stpp); + status = nfs4_seqid_op_checks(cstate, stateid, seqid, stp); + if (!status) + *stpp = stp; + else + nfs4_put_stid(&stp->st_stid); + return status; } static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, @@ -3947,14 +4619,18 @@ static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cs { __be32 status; struct nfs4_openowner *oo; + struct nfs4_ol_stateid *stp; status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, - NFS4_OPEN_STID, stpp, nn); + NFS4_OPEN_STID, &stp, nn); if (status) return status; - oo = openowner((*stpp)->st_stateowner); - if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) + oo = openowner(stp->st_stateowner); + if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { + nfs4_put_stid(&stp->st_stid); return nfserr_bad_stateid; + } + *stpp = stp; return nfs_ok; } @@ -3974,8 +4650,6 @@ nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, if (status) return status; - nfs4_lock_state(); - status = nfs4_preprocess_seqid_op(cstate, oc->oc_seqid, &oc->oc_req_stateid, NFS4_OPEN_STID, &stp, nn); @@ -3984,7 +4658,7 @@ nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, oo = openowner(stp->st_stateowner); status = nfserr_bad_stateid; if (oo->oo_flags & NFS4_OO_CONFIRMED) - goto out; + goto put_stateid; oo->oo_flags |= NFS4_OO_CONFIRMED; update_stateid(&stp->st_stid.sc_stateid); memcpy(&oc->oc_resp_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); @@ -3993,10 +4667,10 @@ nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, nfsd4_client_record_create(oo->oo_owner.so_client); status = nfs_ok; +put_stateid: + nfs4_put_stid(&stp->st_stid); out: nfsd4_bump_seqid(cstate, status); - if (!cstate->replay_owner) - nfs4_unlock_state(); return status; } @@ -4004,7 +4678,7 @@ static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 a { if (!test_access(access, stp)) return; - nfs4_file_put_access(stp->st_file, nfs4_access_to_omode(access)); + nfs4_file_put_access(stp->st_stid.sc_file, access); clear_access(access, stp); } @@ -4026,16 +4700,6 @@ static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_ac } } -static void -reset_union_bmap_deny(unsigned long deny, struct nfs4_ol_stateid *stp) -{ - int i; - for (i = 0; i < 4; i++) { - if ((i & deny) != i) - clear_deny(i, stp); - } -} - __be32 nfsd4_open_downgrade(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, @@ -4053,21 +4717,20 @@ nfsd4_open_downgrade(struct svc_rqst *rqstp, dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__, od->od_deleg_want); - nfs4_lock_state(); status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, &od->od_stateid, &stp, nn); if (status) goto out; status = nfserr_inval; if (!test_access(od->od_share_access, stp)) { - dprintk("NFSD: access not a subset current bitmap: 0x%lx, input access=%08x\n", + dprintk("NFSD: access not a subset of current bitmap: 0x%hhx, input access=%08x\n", stp->st_access_bmap, od->od_share_access); - goto out; + goto put_stateid; } if (!test_deny(od->od_share_deny, stp)) { - dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", + dprintk("NFSD: deny not a subset of current bitmap: 0x%hhx, input deny=%08x\n", stp->st_deny_bmap, od->od_share_deny); - goto out; + goto put_stateid; } nfs4_stateid_downgrade(stp, od->od_share_access); @@ -4076,17 +4739,31 @@ nfsd4_open_downgrade(struct svc_rqst *rqstp, update_stateid(&stp->st_stid.sc_stateid); memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); status = nfs_ok; +put_stateid: + nfs4_put_stid(&stp->st_stid); out: nfsd4_bump_seqid(cstate, status); - if (!cstate->replay_owner) - nfs4_unlock_state(); return status; } static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s) { - unhash_open_stateid(s); + struct nfs4_client *clp = s->st_stid.sc_client; + LIST_HEAD(reaplist); + s->st_stid.sc_type = NFS4_CLOSED_STID; + spin_lock(&clp->cl_lock); + unhash_open_stateid(s, &reaplist); + + if (clp->cl_minorversion) { + put_ol_stateid_locked(s, &reaplist); + spin_unlock(&clp->cl_lock); + free_ol_stateid_reaplist(&reaplist); + } else { + spin_unlock(&clp->cl_lock); + free_ol_stateid_reaplist(&reaplist); + move_to_close_lru(s, clp->net); + } } /* @@ -4097,7 +4774,6 @@ nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_close *close) { __be32 status; - struct nfs4_openowner *oo; struct nfs4_ol_stateid *stp; struct net *net = SVC_NET(rqstp); struct nfsd_net *nn = net_generic(net, nfsd_net_id); @@ -4105,7 +4781,6 @@ nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, dprintk("NFSD: nfsd4_close on file %pd\n", cstate->current_fh.fh_dentry); - nfs4_lock_state(); status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, &close->cl_stateid, NFS4_OPEN_STID|NFS4_CLOSED_STID, @@ -4113,31 +4788,14 @@ nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, nfsd4_bump_seqid(cstate, status); if (status) goto out; - oo = openowner(stp->st_stateowner); update_stateid(&stp->st_stid.sc_stateid); memcpy(&close->cl_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); nfsd4_close_open_stateid(stp); - if (cstate->minorversion) - free_generic_stateid(stp); - else - oo->oo_last_closed_stid = stp; - - if (list_empty(&oo->oo_owner.so_stateids)) { - if (cstate->minorversion) - release_openowner(oo); - else { - /* - * In the 4.0 case we need to keep the owners around a - * little while to handle CLOSE replay. - */ - move_to_close_lru(oo, SVC_NET(rqstp)); - } - } + /* put reference from nfs4_preprocess_seqid_op */ + nfs4_put_stid(&stp->st_stid); out: - if (!cstate->replay_owner) - nfs4_unlock_state(); return status; } @@ -4154,28 +4812,24 @@ nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) return status; - nfs4_lock_state(); - status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID, &s, - cstate->minorversion, nn); + status = nfsd4_lookup_stateid(cstate, stateid, NFS4_DELEG_STID, &s, nn); if (status) goto out; dp = delegstateid(s); status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate)); if (status) - goto out; + goto put_stateid; destroy_delegation(dp); +put_stateid: + nfs4_put_stid(&dp->dl_stid); out: - nfs4_unlock_state(); - return status; } #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) -#define LOCKOWNER_INO_HASH_MASK (LOCKOWNER_INO_HASH_SIZE - 1) - static inline u64 end_offset(u64 start, u64 len) { @@ -4196,13 +4850,6 @@ last_byte_offset(u64 start, u64 len) return end > start ? end - 1: NFS4_MAX_UINT64; } -static unsigned int lockowner_ino_hashval(struct inode *inode, u32 cl_id, struct xdr_netobj *ownername) -{ - return (file_hashval(inode) + cl_id - + opaque_hashval(ownername->data, ownername->len)) - & LOCKOWNER_INO_HASH_MASK; -} - /* * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that * we can't properly handle lock requests that go beyond the (2^63 - 1)-th @@ -4255,47 +4902,56 @@ nevermind: deny->ld_type = NFS4_WRITE_LT; } -static bool same_lockowner_ino(struct nfs4_lockowner *lo, struct inode *inode, clientid_t *clid, struct xdr_netobj *owner) +static struct nfs4_lockowner * +find_lockowner_str_locked(clientid_t *clid, struct xdr_netobj *owner, + struct nfs4_client *clp) { - struct nfs4_ol_stateid *lst; + unsigned int strhashval = ownerstr_hashval(owner); + struct nfs4_stateowner *so; - if (!same_owner_str(&lo->lo_owner, owner, clid)) - return false; - if (list_empty(&lo->lo_owner.so_stateids)) { - WARN_ON_ONCE(1); - return false; + lockdep_assert_held(&clp->cl_lock); + + list_for_each_entry(so, &clp->cl_ownerstr_hashtbl[strhashval], + so_strhash) { + if (so->so_is_open_owner) + continue; + if (!same_owner_str(so, owner)) + continue; + atomic_inc(&so->so_count); + return lockowner(so); } - lst = list_first_entry(&lo->lo_owner.so_stateids, - struct nfs4_ol_stateid, st_perstateowner); - return lst->st_file->fi_inode == inode; + return NULL; } static struct nfs4_lockowner * -find_lockowner_str(struct inode *inode, clientid_t *clid, - struct xdr_netobj *owner, struct nfsd_net *nn) +find_lockowner_str(clientid_t *clid, struct xdr_netobj *owner, + struct nfs4_client *clp) { - unsigned int hashval = lockowner_ino_hashval(inode, clid->cl_id, owner); struct nfs4_lockowner *lo; - list_for_each_entry(lo, &nn->lockowner_ino_hashtbl[hashval], lo_owner_ino_hash) { - if (same_lockowner_ino(lo, inode, clid, owner)) - return lo; - } - return NULL; + spin_lock(&clp->cl_lock); + lo = find_lockowner_str_locked(clid, owner, clp); + spin_unlock(&clp->cl_lock); + return lo; } -static void hash_lockowner(struct nfs4_lockowner *lo, unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp) +static void nfs4_unhash_lockowner(struct nfs4_stateowner *sop) { - struct inode *inode = open_stp->st_file->fi_inode; - unsigned int inohash = lockowner_ino_hashval(inode, - clp->cl_clientid.cl_id, &lo->lo_owner.so_owner); - struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); + unhash_lockowner_locked(lockowner(sop)); +} + +static void nfs4_free_lockowner(struct nfs4_stateowner *sop) +{ + struct nfs4_lockowner *lo = lockowner(sop); - list_add(&lo->lo_owner.so_strhash, &nn->ownerstr_hashtbl[strhashval]); - list_add(&lo->lo_owner_ino_hash, &nn->lockowner_ino_hashtbl[inohash]); - list_add(&lo->lo_perstateid, &open_stp->st_lockowners); + kmem_cache_free(lockowner_slab, lo); } +static const struct nfs4_stateowner_operations lockowner_ops = { + .so_unhash = nfs4_unhash_lockowner, + .so_free = nfs4_free_lockowner, +}; + /* * Alloc a lock owner structure. * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has @@ -4303,42 +4959,107 @@ static void hash_lockowner(struct nfs4_lockowner *lo, unsigned int strhashval, s * * strhashval = ownerstr_hashval */ - static struct nfs4_lockowner * -alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp, struct nfsd4_lock *lock) { - struct nfs4_lockowner *lo; +alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, + struct nfs4_ol_stateid *open_stp, + struct nfsd4_lock *lock) +{ + struct nfs4_lockowner *lo, *ret; lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); if (!lo) return NULL; INIT_LIST_HEAD(&lo->lo_owner.so_stateids); lo->lo_owner.so_is_open_owner = 0; - /* It is the openowner seqid that will be incremented in encode in the - * case of new lockowners; so increment the lock seqid manually: */ - lo->lo_owner.so_seqid = lock->lk_new_lock_seqid + 1; - hash_lockowner(lo, strhashval, clp, open_stp); + lo->lo_owner.so_seqid = lock->lk_new_lock_seqid; + lo->lo_owner.so_ops = &lockowner_ops; + spin_lock(&clp->cl_lock); + ret = find_lockowner_str_locked(&clp->cl_clientid, + &lock->lk_new_owner, clp); + if (ret == NULL) { + list_add(&lo->lo_owner.so_strhash, + &clp->cl_ownerstr_hashtbl[strhashval]); + ret = lo; + } else + nfs4_free_lockowner(&lo->lo_owner); + spin_unlock(&clp->cl_lock); return lo; } -static struct nfs4_ol_stateid * -alloc_init_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp, struct nfs4_ol_stateid *open_stp) +static void +init_lock_stateid(struct nfs4_ol_stateid *stp, struct nfs4_lockowner *lo, + struct nfs4_file *fp, struct inode *inode, + struct nfs4_ol_stateid *open_stp) { - struct nfs4_ol_stateid *stp; struct nfs4_client *clp = lo->lo_owner.so_client; - stp = nfs4_alloc_stateid(clp); - if (stp == NULL) - return NULL; + lockdep_assert_held(&clp->cl_lock); + + atomic_inc(&stp->st_stid.sc_count); stp->st_stid.sc_type = NFS4_LOCK_STID; - list_add(&stp->st_perfile, &fp->fi_stateids); - list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); stp->st_stateowner = &lo->lo_owner; + atomic_inc(&lo->lo_owner.so_count); get_nfs4_file(fp); - stp->st_file = fp; + stp->st_stid.sc_file = fp; + stp->st_stid.sc_free = nfs4_free_lock_stateid; stp->st_access_bmap = 0; stp->st_deny_bmap = open_stp->st_deny_bmap; stp->st_openstp = open_stp; - return stp; + list_add(&stp->st_locks, &open_stp->st_locks); + list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); + spin_lock(&fp->fi_lock); + list_add(&stp->st_perfile, &fp->fi_stateids); + spin_unlock(&fp->fi_lock); +} + +static struct nfs4_ol_stateid * +find_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp) +{ + struct nfs4_ol_stateid *lst; + struct nfs4_client *clp = lo->lo_owner.so_client; + + lockdep_assert_held(&clp->cl_lock); + + list_for_each_entry(lst, &lo->lo_owner.so_stateids, st_perstateowner) { + if (lst->st_stid.sc_file == fp) { + atomic_inc(&lst->st_stid.sc_count); + return lst; + } + } + return NULL; +} + +static struct nfs4_ol_stateid * +find_or_create_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fi, + struct inode *inode, struct nfs4_ol_stateid *ost, + bool *new) +{ + struct nfs4_stid *ns = NULL; + struct nfs4_ol_stateid *lst; + struct nfs4_openowner *oo = openowner(ost->st_stateowner); + struct nfs4_client *clp = oo->oo_owner.so_client; + + spin_lock(&clp->cl_lock); + lst = find_lock_stateid(lo, fi); + if (lst == NULL) { + spin_unlock(&clp->cl_lock); + ns = nfs4_alloc_stid(clp, stateid_slab); + if (ns == NULL) + return NULL; + + spin_lock(&clp->cl_lock); + lst = find_lock_stateid(lo, fi); + if (likely(!lst)) { + lst = openlockstateid(ns); + init_lock_stateid(lst, lo, fi, inode, ost); + ns = NULL; + *new = true; + } + } + spin_unlock(&clp->cl_lock); + if (ns) + nfs4_put_stid(ns); + return lst; } static int @@ -4350,46 +5071,53 @@ check_lock_length(u64 offset, u64 length) static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) { - struct nfs4_file *fp = lock_stp->st_file; - int oflag = nfs4_access_to_omode(access); + struct nfs4_file *fp = lock_stp->st_stid.sc_file; + + lockdep_assert_held(&fp->fi_lock); if (test_access(access, lock_stp)) return; - nfs4_file_get_access(fp, oflag); + __nfs4_file_get_access(fp, access); set_access(access, lock_stp); } -static __be32 lookup_or_create_lock_state(struct nfsd4_compound_state *cstate, struct nfs4_ol_stateid *ost, struct nfsd4_lock *lock, struct nfs4_ol_stateid **lst, bool *new) +static __be32 +lookup_or_create_lock_state(struct nfsd4_compound_state *cstate, + struct nfs4_ol_stateid *ost, + struct nfsd4_lock *lock, + struct nfs4_ol_stateid **lst, bool *new) { - struct nfs4_file *fi = ost->st_file; + __be32 status; + struct nfs4_file *fi = ost->st_stid.sc_file; struct nfs4_openowner *oo = openowner(ost->st_stateowner); struct nfs4_client *cl = oo->oo_owner.so_client; + struct inode *inode = cstate->current_fh.fh_dentry->d_inode; struct nfs4_lockowner *lo; unsigned int strhashval; - struct nfsd_net *nn = net_generic(cl->net, nfsd_net_id); - - lo = find_lockowner_str(fi->fi_inode, &cl->cl_clientid, - &lock->v.new.owner, nn); - if (lo) { - if (!cstate->minorversion) - return nfserr_bad_seqid; - /* XXX: a lockowner always has exactly one stateid: */ - *lst = list_first_entry(&lo->lo_owner.so_stateids, - struct nfs4_ol_stateid, st_perstateowner); - return nfs_ok; + + lo = find_lockowner_str(&cl->cl_clientid, &lock->v.new.owner, cl); + if (!lo) { + strhashval = ownerstr_hashval(&lock->v.new.owner); + lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock); + if (lo == NULL) + return nfserr_jukebox; + } else { + /* with an existing lockowner, seqids must be the same */ + status = nfserr_bad_seqid; + if (!cstate->minorversion && + lock->lk_new_lock_seqid != lo->lo_owner.so_seqid) + goto out; } - strhashval = ownerstr_hashval(cl->cl_clientid.cl_id, - &lock->v.new.owner); - lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock); - if (lo == NULL) - return nfserr_jukebox; - *lst = alloc_init_lock_stateid(lo, fi, ost); + + *lst = find_or_create_lock_stateid(lo, fi, inode, ost, new); if (*lst == NULL) { - release_lockowner(lo); - return nfserr_jukebox; + status = nfserr_jukebox; + goto out; } - *new = true; - return nfs_ok; + status = nfs_ok; +out: + nfs4_put_stateowner(&lo->lo_owner); + return status; } /* @@ -4401,14 +5129,16 @@ nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, { struct nfs4_openowner *open_sop = NULL; struct nfs4_lockowner *lock_sop = NULL; - struct nfs4_ol_stateid *lock_stp; + struct nfs4_ol_stateid *lock_stp = NULL; + struct nfs4_ol_stateid *open_stp = NULL; + struct nfs4_file *fp; struct file *filp = NULL; struct file_lock *file_lock = NULL; struct file_lock *conflock = NULL; __be32 status = 0; - bool new_state = false; int lkflg; int err; + bool new = false; struct net *net = SVC_NET(rqstp); struct nfsd_net *nn = net_generic(net, nfsd_net_id); @@ -4425,11 +5155,7 @@ nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, return status; } - nfs4_lock_state(); - if (lock->lk_is_new) { - struct nfs4_ol_stateid *open_stp = NULL; - if (nfsd4_has_session(cstate)) /* See rfc 5661 18.10.3: given clientid is ignored: */ memcpy(&lock->v.new.clientid, @@ -4453,12 +5179,13 @@ nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, &lock->v.new.clientid)) goto out; status = lookup_or_create_lock_state(cstate, open_stp, lock, - &lock_stp, &new_state); - } else + &lock_stp, &new); + } else { status = nfs4_preprocess_seqid_op(cstate, lock->lk_old_lock_seqid, &lock->lk_old_lock_stateid, NFS4_LOCK_STID, &lock_stp, nn); + } if (status) goto out; lock_sop = lockowner(lock_stp->st_stateowner); @@ -4482,20 +5209,25 @@ nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, goto out; } + fp = lock_stp->st_stid.sc_file; locks_init_lock(file_lock); switch (lock->lk_type) { case NFS4_READ_LT: case NFS4_READW_LT: - filp = find_readable_file(lock_stp->st_file); + spin_lock(&fp->fi_lock); + filp = find_readable_file_locked(fp); if (filp) get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); + spin_unlock(&fp->fi_lock); file_lock->fl_type = F_RDLCK; break; case NFS4_WRITE_LT: case NFS4_WRITEW_LT: - filp = find_writeable_file(lock_stp->st_file); + spin_lock(&fp->fi_lock); + filp = find_writeable_file_locked(fp); if (filp) get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); + spin_unlock(&fp->fi_lock); file_lock->fl_type = F_WRLCK; break; default: @@ -4544,11 +5276,27 @@ nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, break; } out: - if (status && new_state) - release_lockowner(lock_sop); + if (filp) + fput(filp); + if (lock_stp) { + /* Bump seqid manually if the 4.0 replay owner is openowner */ + if (cstate->replay_owner && + cstate->replay_owner != &lock_sop->lo_owner && + seqid_mutating_err(ntohl(status))) + lock_sop->lo_owner.so_seqid++; + + /* + * If this is a new, never-before-used stateid, and we are + * returning an error, then just go ahead and release it. + */ + if (status && new) + release_lock_stateid(lock_stp); + + nfs4_put_stid(&lock_stp->st_stid); + } + if (open_stp) + nfs4_put_stid(&open_stp->st_stid); nfsd4_bump_seqid(cstate, status); - if (!cstate->replay_owner) - nfs4_unlock_state(); if (file_lock) locks_free_lock(file_lock); if (conflock) @@ -4580,9 +5328,8 @@ __be32 nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_lockt *lockt) { - struct inode *inode; struct file_lock *file_lock = NULL; - struct nfs4_lockowner *lo; + struct nfs4_lockowner *lo = NULL; __be32 status; struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); @@ -4592,10 +5339,8 @@ nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, if (check_lock_length(lockt->lt_offset, lockt->lt_length)) return nfserr_inval; - nfs4_lock_state(); - if (!nfsd4_has_session(cstate)) { - status = lookup_clientid(&lockt->lt_clientid, false, nn, NULL); + status = lookup_clientid(&lockt->lt_clientid, cstate, nn); if (status) goto out; } @@ -4603,7 +5348,6 @@ nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) goto out; - inode = cstate->current_fh.fh_dentry->d_inode; file_lock = locks_alloc_lock(); if (!file_lock) { dprintk("NFSD: %s: unable to allocate lock!\n", __func__); @@ -4626,7 +5370,8 @@ nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, goto out; } - lo = find_lockowner_str(inode, &lockt->lt_clientid, &lockt->lt_owner, nn); + lo = find_lockowner_str(&lockt->lt_clientid, &lockt->lt_owner, + cstate->clp); if (lo) file_lock->fl_owner = (fl_owner_t)lo; file_lock->fl_pid = current->tgid; @@ -4646,7 +5391,8 @@ nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, nfs4_set_lock_denied(file_lock, &lockt->lt_denied); } out: - nfs4_unlock_state(); + if (lo) + nfs4_put_stateowner(&lo->lo_owner); if (file_lock) locks_free_lock(file_lock); return status; @@ -4670,23 +5416,21 @@ nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, if (check_lock_length(locku->lu_offset, locku->lu_length)) return nfserr_inval; - nfs4_lock_state(); - status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, &locku->lu_stateid, NFS4_LOCK_STID, &stp, nn); if (status) goto out; - filp = find_any_file(stp->st_file); + filp = find_any_file(stp->st_stid.sc_file); if (!filp) { status = nfserr_lock_range; - goto out; + goto put_stateid; } file_lock = locks_alloc_lock(); if (!file_lock) { dprintk("NFSD: %s: unable to allocate lock!\n", __func__); status = nfserr_jukebox; - goto out; + goto fput; } locks_init_lock(file_lock); file_lock->fl_type = F_UNLCK; @@ -4708,41 +5452,51 @@ nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, } update_stateid(&stp->st_stid.sc_stateid); memcpy(&locku->lu_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); - +fput: + fput(filp); +put_stateid: + nfs4_put_stid(&stp->st_stid); out: nfsd4_bump_seqid(cstate, status); - if (!cstate->replay_owner) - nfs4_unlock_state(); if (file_lock) locks_free_lock(file_lock); return status; out_nfserr: status = nfserrno(err); - goto out; + goto fput; } /* * returns - * 1: locks held by lockowner - * 0: no locks held by lockowner + * true: locks held by lockowner + * false: no locks held by lockowner */ -static int -check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner) +static bool +check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *lowner) { struct file_lock **flpp; - struct inode *inode = filp->fi_inode; - int status = 0; + int status = false; + struct file *filp = find_any_file(fp); + struct inode *inode; + + if (!filp) { + /* Any valid lock stateid should have some sort of access */ + WARN_ON_ONCE(1); + return status; + } + + inode = file_inode(filp); spin_lock(&inode->i_lock); for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { if ((*flpp)->fl_owner == (fl_owner_t)lowner) { - status = 1; - goto out; + status = true; + break; } } -out: spin_unlock(&inode->i_lock); + fput(filp); return status; } @@ -4753,53 +5507,46 @@ nfsd4_release_lockowner(struct svc_rqst *rqstp, { clientid_t *clid = &rlockowner->rl_clientid; struct nfs4_stateowner *sop; - struct nfs4_lockowner *lo; + struct nfs4_lockowner *lo = NULL; struct nfs4_ol_stateid *stp; struct xdr_netobj *owner = &rlockowner->rl_owner; - struct list_head matches; - unsigned int hashval = ownerstr_hashval(clid->cl_id, owner); + unsigned int hashval = ownerstr_hashval(owner); __be32 status; struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); + struct nfs4_client *clp; dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", clid->cl_boot, clid->cl_id); - nfs4_lock_state(); - - status = lookup_clientid(clid, cstate->minorversion, nn, NULL); + status = lookup_clientid(clid, cstate, nn); if (status) - goto out; + return status; - status = nfserr_locks_held; - INIT_LIST_HEAD(&matches); + clp = cstate->clp; + /* Find the matching lock stateowner */ + spin_lock(&clp->cl_lock); + list_for_each_entry(sop, &clp->cl_ownerstr_hashtbl[hashval], + so_strhash) { - list_for_each_entry(sop, &nn->ownerstr_hashtbl[hashval], so_strhash) { - if (sop->so_is_open_owner) + if (sop->so_is_open_owner || !same_owner_str(sop, owner)) continue; - if (!same_owner_str(sop, owner, clid)) - continue; - list_for_each_entry(stp, &sop->so_stateids, - st_perstateowner) { - lo = lockowner(sop); - if (check_for_locks(stp->st_file, lo)) - goto out; - list_add(&lo->lo_list, &matches); + + /* see if there are still any locks associated with it */ + lo = lockowner(sop); + list_for_each_entry(stp, &sop->so_stateids, st_perstateowner) { + if (check_for_locks(stp->st_stid.sc_file, lo)) { + status = nfserr_locks_held; + spin_unlock(&clp->cl_lock); + return status; + } } + + atomic_inc(&sop->so_count); + break; } - /* Clients probably won't expect us to return with some (but not all) - * of the lockowner state released; so don't release any until all - * have been checked. */ - status = nfs_ok; - while (!list_empty(&matches)) { - lo = list_entry(matches.next, struct nfs4_lockowner, - lo_list); - /* unhash_stateowner deletes so_perclient only - * for openowners. */ - list_del(&lo->lo_list); + spin_unlock(&clp->cl_lock); + if (lo) release_lockowner(lo); - } -out: - nfs4_unlock_state(); return status; } @@ -4887,34 +5634,123 @@ nfsd4_find_reclaim_client(const char *recdir, struct nfsd_net *nn) * Called from OPEN. Look for clientid in reclaim list. */ __be32 -nfs4_check_open_reclaim(clientid_t *clid, bool sessions, struct nfsd_net *nn) +nfs4_check_open_reclaim(clientid_t *clid, + struct nfsd4_compound_state *cstate, + struct nfsd_net *nn) { - struct nfs4_client *clp; + __be32 status; /* find clientid in conf_id_hashtbl */ - clp = find_confirmed_client(clid, sessions, nn); - if (clp == NULL) + status = lookup_clientid(clid, cstate, nn); + if (status) return nfserr_reclaim_bad; - return nfsd4_client_record_check(clp) ? nfserr_reclaim_bad : nfs_ok; + if (nfsd4_client_record_check(cstate->clp)) + return nfserr_reclaim_bad; + + return nfs_ok; } #ifdef CONFIG_NFSD_FAULT_INJECTION +static inline void +put_client(struct nfs4_client *clp) +{ + atomic_dec(&clp->cl_refcount); +} -u64 nfsd_forget_client(struct nfs4_client *clp, u64 max) +static struct nfs4_client * +nfsd_find_client(struct sockaddr_storage *addr, size_t addr_size) { - if (mark_client_expired(clp)) - return 0; - expire_client(clp); - return 1; + struct nfs4_client *clp; + struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, + nfsd_net_id); + + if (!nfsd_netns_ready(nn)) + return NULL; + + list_for_each_entry(clp, &nn->client_lru, cl_lru) { + if (memcmp(&clp->cl_addr, addr, addr_size) == 0) + return clp; + } + return NULL; } -u64 nfsd_print_client(struct nfs4_client *clp, u64 num) +u64 +nfsd_inject_print_clients(void) { + struct nfs4_client *clp; + u64 count = 0; + struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, + nfsd_net_id); char buf[INET6_ADDRSTRLEN]; - rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); - printk(KERN_INFO "NFS Client: %s\n", buf); - return 1; + + if (!nfsd_netns_ready(nn)) + return 0; + + spin_lock(&nn->client_lock); + list_for_each_entry(clp, &nn->client_lru, cl_lru) { + rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); + pr_info("NFS Client: %s\n", buf); + ++count; + } + spin_unlock(&nn->client_lock); + + return count; +} + +u64 +nfsd_inject_forget_client(struct sockaddr_storage *addr, size_t addr_size) +{ + u64 count = 0; + struct nfs4_client *clp; + struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, + nfsd_net_id); + + if (!nfsd_netns_ready(nn)) + return count; + + spin_lock(&nn->client_lock); + clp = nfsd_find_client(addr, addr_size); + if (clp) { + if (mark_client_expired_locked(clp) == nfs_ok) + ++count; + else + clp = NULL; + } + spin_unlock(&nn->client_lock); + + if (clp) + expire_client(clp); + + return count; +} + +u64 +nfsd_inject_forget_clients(u64 max) +{ + u64 count = 0; + struct nfs4_client *clp, *next; + struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, + nfsd_net_id); + LIST_HEAD(reaplist); + + if (!nfsd_netns_ready(nn)) + return count; + + spin_lock(&nn->client_lock); + list_for_each_entry_safe(clp, next, &nn->client_lru, cl_lru) { + if (mark_client_expired_locked(clp) == nfs_ok) { + list_add(&clp->cl_lru, &reaplist); + if (max != 0 && ++count >= max) + break; + } + } + spin_unlock(&nn->client_lock); + + list_for_each_entry_safe(clp, next, &reaplist, cl_lru) + expire_client(clp); + + return count; } static void nfsd_print_count(struct nfs4_client *clp, unsigned int count, @@ -4925,158 +5761,484 @@ static void nfsd_print_count(struct nfs4_client *clp, unsigned int count, printk(KERN_INFO "NFS Client: %s has %u %s\n", buf, count, type); } -static u64 nfsd_foreach_client_lock(struct nfs4_client *clp, u64 max, void (*func)(struct nfs4_lockowner *)) +static void +nfsd_inject_add_lock_to_list(struct nfs4_ol_stateid *lst, + struct list_head *collect) +{ + struct nfs4_client *clp = lst->st_stid.sc_client; + struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, + nfsd_net_id); + + if (!collect) + return; + + lockdep_assert_held(&nn->client_lock); + atomic_inc(&clp->cl_refcount); + list_add(&lst->st_locks, collect); +} + +static u64 nfsd_foreach_client_lock(struct nfs4_client *clp, u64 max, + struct list_head *collect, + void (*func)(struct nfs4_ol_stateid *)) { struct nfs4_openowner *oop; - struct nfs4_lockowner *lop, *lo_next; struct nfs4_ol_stateid *stp, *st_next; + struct nfs4_ol_stateid *lst, *lst_next; u64 count = 0; + spin_lock(&clp->cl_lock); list_for_each_entry(oop, &clp->cl_openowners, oo_perclient) { - list_for_each_entry_safe(stp, st_next, &oop->oo_owner.so_stateids, st_perstateowner) { - list_for_each_entry_safe(lop, lo_next, &stp->st_lockowners, lo_perstateid) { - if (func) - func(lop); - if (++count == max) - return count; + list_for_each_entry_safe(stp, st_next, + &oop->oo_owner.so_stateids, st_perstateowner) { + list_for_each_entry_safe(lst, lst_next, + &stp->st_locks, st_locks) { + if (func) { + func(lst); + nfsd_inject_add_lock_to_list(lst, + collect); + } + ++count; + /* + * Despite the fact that these functions deal + * with 64-bit integers for "count", we must + * ensure that it doesn't blow up the + * clp->cl_refcount. Throw a warning if we + * start to approach INT_MAX here. + */ + WARN_ON_ONCE(count == (INT_MAX / 2)); + if (count == max) + goto out; } } } +out: + spin_unlock(&clp->cl_lock); return count; } -u64 nfsd_forget_client_locks(struct nfs4_client *clp, u64 max) +static u64 +nfsd_collect_client_locks(struct nfs4_client *clp, struct list_head *collect, + u64 max) { - return nfsd_foreach_client_lock(clp, max, release_lockowner); + return nfsd_foreach_client_lock(clp, max, collect, unhash_lock_stateid); } -u64 nfsd_print_client_locks(struct nfs4_client *clp, u64 max) +static u64 +nfsd_print_client_locks(struct nfs4_client *clp) { - u64 count = nfsd_foreach_client_lock(clp, max, NULL); + u64 count = nfsd_foreach_client_lock(clp, 0, NULL, NULL); nfsd_print_count(clp, count, "locked files"); return count; } -static u64 nfsd_foreach_client_open(struct nfs4_client *clp, u64 max, void (*func)(struct nfs4_openowner *)) +u64 +nfsd_inject_print_locks(void) +{ + struct nfs4_client *clp; + u64 count = 0; + struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, + nfsd_net_id); + + if (!nfsd_netns_ready(nn)) + return 0; + + spin_lock(&nn->client_lock); + list_for_each_entry(clp, &nn->client_lru, cl_lru) + count += nfsd_print_client_locks(clp); + spin_unlock(&nn->client_lock); + + return count; +} + +static void +nfsd_reap_locks(struct list_head *reaplist) +{ + struct nfs4_client *clp; + struct nfs4_ol_stateid *stp, *next; + + list_for_each_entry_safe(stp, next, reaplist, st_locks) { + list_del_init(&stp->st_locks); + clp = stp->st_stid.sc_client; + nfs4_put_stid(&stp->st_stid); + put_client(clp); + } +} + +u64 +nfsd_inject_forget_client_locks(struct sockaddr_storage *addr, size_t addr_size) +{ + unsigned int count = 0; + struct nfs4_client *clp; + struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, + nfsd_net_id); + LIST_HEAD(reaplist); + + if (!nfsd_netns_ready(nn)) + return count; + + spin_lock(&nn->client_lock); + clp = nfsd_find_client(addr, addr_size); + if (clp) + count = nfsd_collect_client_locks(clp, &reaplist, 0); + spin_unlock(&nn->client_lock); + nfsd_reap_locks(&reaplist); + return count; +} + +u64 +nfsd_inject_forget_locks(u64 max) +{ + u64 count = 0; + struct nfs4_client *clp; + struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, + nfsd_net_id); + LIST_HEAD(reaplist); + + if (!nfsd_netns_ready(nn)) + return count; + + spin_lock(&nn->client_lock); + list_for_each_entry(clp, &nn->client_lru, cl_lru) { + count += nfsd_collect_client_locks(clp, &reaplist, max - count); + if (max != 0 && count >= max) + break; + } + spin_unlock(&nn->client_lock); + nfsd_reap_locks(&reaplist); + return count; +} + +static u64 +nfsd_foreach_client_openowner(struct nfs4_client *clp, u64 max, + struct list_head *collect, + void (*func)(struct nfs4_openowner *)) { struct nfs4_openowner *oop, *next; + struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, + nfsd_net_id); u64 count = 0; + lockdep_assert_held(&nn->client_lock); + + spin_lock(&clp->cl_lock); list_for_each_entry_safe(oop, next, &clp->cl_openowners, oo_perclient) { - if (func) + if (func) { func(oop); - if (++count == max) + if (collect) { + atomic_inc(&clp->cl_refcount); + list_add(&oop->oo_perclient, collect); + } + } + ++count; + /* + * Despite the fact that these functions deal with + * 64-bit integers for "count", we must ensure that + * it doesn't blow up the clp->cl_refcount. Throw a + * warning if we start to approach INT_MAX here. + */ + WARN_ON_ONCE(count == (INT_MAX / 2)); + if (count == max) break; } + spin_unlock(&clp->cl_lock); return count; } -u64 nfsd_forget_client_openowners(struct nfs4_client *clp, u64 max) +static u64 +nfsd_print_client_openowners(struct nfs4_client *clp) { - return nfsd_foreach_client_open(clp, max, release_openowner); + u64 count = nfsd_foreach_client_openowner(clp, 0, NULL, NULL); + + nfsd_print_count(clp, count, "openowners"); + return count; } -u64 nfsd_print_client_openowners(struct nfs4_client *clp, u64 max) +static u64 +nfsd_collect_client_openowners(struct nfs4_client *clp, + struct list_head *collect, u64 max) { - u64 count = nfsd_foreach_client_open(clp, max, NULL); - nfsd_print_count(clp, count, "open files"); - return count; + return nfsd_foreach_client_openowner(clp, max, collect, + unhash_openowner_locked); } -static u64 nfsd_find_all_delegations(struct nfs4_client *clp, u64 max, - struct list_head *victims) +u64 +nfsd_inject_print_openowners(void) { - struct nfs4_delegation *dp, *next; + struct nfs4_client *clp; u64 count = 0; + struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, + nfsd_net_id); + + if (!nfsd_netns_ready(nn)) + return 0; + + spin_lock(&nn->client_lock); + list_for_each_entry(clp, &nn->client_lru, cl_lru) + count += nfsd_print_client_openowners(clp); + spin_unlock(&nn->client_lock); - lockdep_assert_held(&state_lock); - list_for_each_entry_safe(dp, next, &clp->cl_delegations, dl_perclnt) { - if (victims) - list_move(&dp->dl_recall_lru, victims); - if (++count == max) - break; - } return count; } -u64 nfsd_forget_client_delegations(struct nfs4_client *clp, u64 max) +static void +nfsd_reap_openowners(struct list_head *reaplist) { - struct nfs4_delegation *dp, *next; - LIST_HEAD(victims); - u64 count; + struct nfs4_client *clp; + struct nfs4_openowner *oop, *next; - spin_lock(&state_lock); - count = nfsd_find_all_delegations(clp, max, &victims); - spin_unlock(&state_lock); + list_for_each_entry_safe(oop, next, reaplist, oo_perclient) { + list_del_init(&oop->oo_perclient); + clp = oop->oo_owner.so_client; + release_openowner(oop); + put_client(clp); + } +} - list_for_each_entry_safe(dp, next, &victims, dl_recall_lru) - revoke_delegation(dp); +u64 +nfsd_inject_forget_client_openowners(struct sockaddr_storage *addr, + size_t addr_size) +{ + unsigned int count = 0; + struct nfs4_client *clp; + struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, + nfsd_net_id); + LIST_HEAD(reaplist); + if (!nfsd_netns_ready(nn)) + return count; + + spin_lock(&nn->client_lock); + clp = nfsd_find_client(addr, addr_size); + if (clp) + count = nfsd_collect_client_openowners(clp, &reaplist, 0); + spin_unlock(&nn->client_lock); + nfsd_reap_openowners(&reaplist); return count; } -u64 nfsd_recall_client_delegations(struct nfs4_client *clp, u64 max) +u64 +nfsd_inject_forget_openowners(u64 max) { - struct nfs4_delegation *dp, *next; - LIST_HEAD(victims); - u64 count; + u64 count = 0; + struct nfs4_client *clp; + struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, + nfsd_net_id); + LIST_HEAD(reaplist); - spin_lock(&state_lock); - count = nfsd_find_all_delegations(clp, max, &victims); - list_for_each_entry_safe(dp, next, &victims, dl_recall_lru) - nfsd_break_one_deleg(dp); - spin_unlock(&state_lock); + if (!nfsd_netns_ready(nn)) + return count; + spin_lock(&nn->client_lock); + list_for_each_entry(clp, &nn->client_lru, cl_lru) { + count += nfsd_collect_client_openowners(clp, &reaplist, + max - count); + if (max != 0 && count >= max) + break; + } + spin_unlock(&nn->client_lock); + nfsd_reap_openowners(&reaplist); return count; } -u64 nfsd_print_client_delegations(struct nfs4_client *clp, u64 max) +static u64 nfsd_find_all_delegations(struct nfs4_client *clp, u64 max, + struct list_head *victims) { + struct nfs4_delegation *dp, *next; + struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, + nfsd_net_id); u64 count = 0; + lockdep_assert_held(&nn->client_lock); + spin_lock(&state_lock); - count = nfsd_find_all_delegations(clp, max, NULL); + list_for_each_entry_safe(dp, next, &clp->cl_delegations, dl_perclnt) { + if (victims) { + /* + * It's not safe to mess with delegations that have a + * non-zero dl_time. They might have already been broken + * and could be processed by the laundromat outside of + * the state_lock. Just leave them be. + */ + if (dp->dl_time != 0) + continue; + + atomic_inc(&clp->cl_refcount); + unhash_delegation_locked(dp); + list_add(&dp->dl_recall_lru, victims); + } + ++count; + /* + * Despite the fact that these functions deal with + * 64-bit integers for "count", we must ensure that + * it doesn't blow up the clp->cl_refcount. Throw a + * warning if we start to approach INT_MAX here. + */ + WARN_ON_ONCE(count == (INT_MAX / 2)); + if (count == max) + break; + } spin_unlock(&state_lock); + return count; +} + +static u64 +nfsd_print_client_delegations(struct nfs4_client *clp) +{ + u64 count = nfsd_find_all_delegations(clp, 0, NULL); nfsd_print_count(clp, count, "delegations"); return count; } -u64 nfsd_for_n_state(u64 max, u64 (*func)(struct nfs4_client *, u64)) +u64 +nfsd_inject_print_delegations(void) { - struct nfs4_client *clp, *next; + struct nfs4_client *clp; u64 count = 0; - struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, nfsd_net_id); + struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, + nfsd_net_id); if (!nfsd_netns_ready(nn)) return 0; - list_for_each_entry_safe(clp, next, &nn->client_lru, cl_lru) { - count += func(clp, max - count); - if ((max != 0) && (count >= max)) - break; + spin_lock(&nn->client_lock); + list_for_each_entry(clp, &nn->client_lru, cl_lru) + count += nfsd_print_client_delegations(clp); + spin_unlock(&nn->client_lock); + + return count; +} + +static void +nfsd_forget_delegations(struct list_head *reaplist) +{ + struct nfs4_client *clp; + struct nfs4_delegation *dp, *next; + + list_for_each_entry_safe(dp, next, reaplist, dl_recall_lru) { + list_del_init(&dp->dl_recall_lru); + clp = dp->dl_stid.sc_client; + revoke_delegation(dp); + put_client(clp); } +} +u64 +nfsd_inject_forget_client_delegations(struct sockaddr_storage *addr, + size_t addr_size) +{ + u64 count = 0; + struct nfs4_client *clp; + struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, + nfsd_net_id); + LIST_HEAD(reaplist); + + if (!nfsd_netns_ready(nn)) + return count; + + spin_lock(&nn->client_lock); + clp = nfsd_find_client(addr, addr_size); + if (clp) + count = nfsd_find_all_delegations(clp, 0, &reaplist); + spin_unlock(&nn->client_lock); + + nfsd_forget_delegations(&reaplist); return count; } -struct nfs4_client *nfsd_find_client(struct sockaddr_storage *addr, size_t addr_size) +u64 +nfsd_inject_forget_delegations(u64 max) { + u64 count = 0; struct nfs4_client *clp; - struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, nfsd_net_id); + struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, + nfsd_net_id); + LIST_HEAD(reaplist); if (!nfsd_netns_ready(nn)) - return NULL; + return count; + spin_lock(&nn->client_lock); list_for_each_entry(clp, &nn->client_lru, cl_lru) { - if (memcmp(&clp->cl_addr, addr, addr_size) == 0) - return clp; + count += nfsd_find_all_delegations(clp, max - count, &reaplist); + if (max != 0 && count >= max) + break; } - return NULL; + spin_unlock(&nn->client_lock); + nfsd_forget_delegations(&reaplist); + return count; } +static void +nfsd_recall_delegations(struct list_head *reaplist) +{ + struct nfs4_client *clp; + struct nfs4_delegation *dp, *next; + + list_for_each_entry_safe(dp, next, reaplist, dl_recall_lru) { + list_del_init(&dp->dl_recall_lru); + clp = dp->dl_stid.sc_client; + /* + * We skipped all entries that had a zero dl_time before, + * so we can now reset the dl_time back to 0. If a delegation + * break comes in now, then it won't make any difference since + * we're recalling it either way. + */ + spin_lock(&state_lock); + dp->dl_time = 0; + spin_unlock(&state_lock); + nfsd_break_one_deleg(dp); + put_client(clp); + } +} + +u64 +nfsd_inject_recall_client_delegations(struct sockaddr_storage *addr, + size_t addr_size) +{ + u64 count = 0; + struct nfs4_client *clp; + struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, + nfsd_net_id); + LIST_HEAD(reaplist); + + if (!nfsd_netns_ready(nn)) + return count; + + spin_lock(&nn->client_lock); + clp = nfsd_find_client(addr, addr_size); + if (clp) + count = nfsd_find_all_delegations(clp, 0, &reaplist); + spin_unlock(&nn->client_lock); + + nfsd_recall_delegations(&reaplist); + return count; +} + +u64 +nfsd_inject_recall_delegations(u64 max) +{ + u64 count = 0; + struct nfs4_client *clp, *next; + struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, + nfsd_net_id); + LIST_HEAD(reaplist); + + if (!nfsd_netns_ready(nn)) + return count; + + spin_lock(&nn->client_lock); + list_for_each_entry_safe(clp, next, &nn->client_lru, cl_lru) { + count += nfsd_find_all_delegations(clp, max - count, &reaplist); + if (max != 0 && ++count >= max) + break; + } + spin_unlock(&nn->client_lock); + nfsd_recall_delegations(&reaplist); + return count; +} #endif /* CONFIG_NFSD_FAULT_INJECTION */ /* @@ -5113,14 +6275,6 @@ static int nfs4_state_create_net(struct net *net) CLIENT_HASH_SIZE, GFP_KERNEL); if (!nn->unconf_id_hashtbl) goto err_unconf_id; - nn->ownerstr_hashtbl = kmalloc(sizeof(struct list_head) * - OWNER_HASH_SIZE, GFP_KERNEL); - if (!nn->ownerstr_hashtbl) - goto err_ownerstr; - nn->lockowner_ino_hashtbl = kmalloc(sizeof(struct list_head) * - LOCKOWNER_INO_HASH_SIZE, GFP_KERNEL); - if (!nn->lockowner_ino_hashtbl) - goto err_lockowner_ino; nn->sessionid_hashtbl = kmalloc(sizeof(struct list_head) * SESSION_HASH_SIZE, GFP_KERNEL); if (!nn->sessionid_hashtbl) @@ -5130,10 +6284,6 @@ static int nfs4_state_create_net(struct net *net) INIT_LIST_HEAD(&nn->conf_id_hashtbl[i]); INIT_LIST_HEAD(&nn->unconf_id_hashtbl[i]); } - for (i = 0; i < OWNER_HASH_SIZE; i++) - INIT_LIST_HEAD(&nn->ownerstr_hashtbl[i]); - for (i = 0; i < LOCKOWNER_INO_HASH_SIZE; i++) - INIT_LIST_HEAD(&nn->lockowner_ino_hashtbl[i]); for (i = 0; i < SESSION_HASH_SIZE; i++) INIT_LIST_HEAD(&nn->sessionid_hashtbl[i]); nn->conf_name_tree = RB_ROOT; @@ -5149,10 +6299,6 @@ static int nfs4_state_create_net(struct net *net) return 0; err_sessionid: - kfree(nn->lockowner_ino_hashtbl); -err_lockowner_ino: - kfree(nn->ownerstr_hashtbl); -err_ownerstr: kfree(nn->unconf_id_hashtbl); err_unconf_id: kfree(nn->conf_id_hashtbl); @@ -5182,8 +6328,6 @@ nfs4_state_destroy_net(struct net *net) } kfree(nn->sessionid_hashtbl); - kfree(nn->lockowner_ino_hashtbl); - kfree(nn->ownerstr_hashtbl); kfree(nn->unconf_id_hashtbl); kfree(nn->conf_id_hashtbl); put_net(net); @@ -5247,22 +6391,22 @@ nfs4_state_shutdown_net(struct net *net) cancel_delayed_work_sync(&nn->laundromat_work); locks_end_grace(&nn->nfsd4_manager); - nfs4_lock_state(); INIT_LIST_HEAD(&reaplist); spin_lock(&state_lock); list_for_each_safe(pos, next, &nn->del_recall_lru) { dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); - list_move(&dp->dl_recall_lru, &reaplist); + unhash_delegation_locked(dp); + list_add(&dp->dl_recall_lru, &reaplist); } spin_unlock(&state_lock); list_for_each_safe(pos, next, &reaplist) { dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); - destroy_delegation(dp); + list_del_init(&dp->dl_recall_lru); + nfs4_put_stid(&dp->dl_stid); } nfsd4_client_tracking_exit(net); nfs4_state_destroy_net(net); - nfs4_unlock_state(); } void diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c index 944275c8f56d..f9821ce6658a 100644 --- a/fs/nfsd/nfs4xdr.c +++ b/fs/nfsd/nfs4xdr.c @@ -181,28 +181,43 @@ static int zero_clientid(clientid_t *clid) } /** - * defer_free - mark an allocation as deferred freed - * @argp: NFSv4 compound argument structure to be freed with - * @release: release callback to free @p, typically kfree() - * @p: pointer to be freed + * svcxdr_tmpalloc - allocate memory to be freed after compound processing + * @argp: NFSv4 compound argument structure + * @p: pointer to be freed (with kfree()) * * Marks @p to be freed when processing the compound operation * described in @argp finishes. */ -static int -defer_free(struct nfsd4_compoundargs *argp, - void (*release)(const void *), void *p) +static void * +svcxdr_tmpalloc(struct nfsd4_compoundargs *argp, u32 len) { - struct tmpbuf *tb; + struct svcxdr_tmpbuf *tb; - tb = kmalloc(sizeof(*tb), GFP_KERNEL); + tb = kmalloc(sizeof(*tb) + len, GFP_KERNEL); if (!tb) - return -ENOMEM; - tb->buf = p; - tb->release = release; + return NULL; tb->next = argp->to_free; argp->to_free = tb; - return 0; + return tb->buf; +} + +/* + * For xdr strings that need to be passed to other kernel api's + * as null-terminated strings. + * + * Note null-terminating in place usually isn't safe since the + * buffer might end on a page boundary. + */ +static char * +svcxdr_dupstr(struct nfsd4_compoundargs *argp, void *buf, u32 len) +{ + char *p = svcxdr_tmpalloc(argp, len + 1); + + if (!p) + return NULL; + memcpy(p, buf, len); + p[len] = '\0'; + return p; } /** @@ -217,19 +232,13 @@ defer_free(struct nfsd4_compoundargs *argp, */ static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes) { - if (p == argp->tmp) { - p = kmemdup(argp->tmp, nbytes, GFP_KERNEL); - if (!p) - return NULL; - } else { - BUG_ON(p != argp->tmpp); - argp->tmpp = NULL; - } - if (defer_free(argp, kfree, p)) { - kfree(p); + void *ret; + + ret = svcxdr_tmpalloc(argp, nbytes); + if (!ret) return NULL; - } else - return (char *)p; + memcpy(ret, p, nbytes); + return ret; } static __be32 @@ -292,12 +301,10 @@ nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, if (nace > NFS4_ACL_MAX) return nfserr_fbig; - *acl = nfs4_acl_new(nace); + *acl = svcxdr_tmpalloc(argp, nfs4_acl_bytes(nace)); if (*acl == NULL) return nfserr_jukebox; - defer_free(argp, kfree, *acl); - (*acl)->naces = nace; for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) { READ_BUF(16); len += 16; @@ -418,12 +425,10 @@ nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, return nfserr_badlabel; len += (XDR_QUADLEN(dummy32) << 2); READMEM(buf, dummy32); - label->data = kzalloc(dummy32 + 1, GFP_KERNEL); + label->len = dummy32; + label->data = svcxdr_dupstr(argp, buf, dummy32); if (!label->data) return nfserr_jukebox; - label->len = dummy32; - defer_free(argp, kfree, label->data); - memcpy(label->data, buf, dummy32); } #endif @@ -598,20 +603,11 @@ nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create switch (create->cr_type) { case NF4LNK: READ_BUF(4); - create->cr_linklen = be32_to_cpup(p++); - READ_BUF(create->cr_linklen); - /* - * The VFS will want a null-terminated string, and - * null-terminating in place isn't safe since this might - * end on a page boundary: - */ - create->cr_linkname = - kmalloc(create->cr_linklen + 1, GFP_KERNEL); - if (!create->cr_linkname) + create->cr_datalen = be32_to_cpup(p++); + READ_BUF(create->cr_datalen); + create->cr_data = svcxdr_dupstr(argp, p, create->cr_datalen); + if (!create->cr_data) return nfserr_jukebox; - memcpy(create->cr_linkname, p, create->cr_linklen); - create->cr_linkname[create->cr_linklen] = '\0'; - defer_free(argp, kfree, create->cr_linkname); break; case NF4BLK: case NF4CHR: @@ -1481,13 +1477,12 @@ nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_sta INIT_LIST_HEAD(&test_stateid->ts_stateid_list); for (i = 0; i < test_stateid->ts_num_ids; i++) { - stateid = kmalloc(sizeof(struct nfsd4_test_stateid_id), GFP_KERNEL); + stateid = svcxdr_tmpalloc(argp, sizeof(*stateid)); if (!stateid) { status = nfserrno(-ENOMEM); goto out; } - defer_free(argp, kfree, stateid); INIT_LIST_HEAD(&stateid->ts_id_list); list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list); @@ -1640,7 +1635,7 @@ nfsd4_decode_compound(struct nfsd4_compoundargs *argp) goto xdr_error; if (argp->opcnt > ARRAY_SIZE(argp->iops)) { - argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL); + argp->ops = kzalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL); if (!argp->ops) { argp->ops = argp->iops; dprintk("nfsd: couldn't allocate room for COMPOUND\n"); @@ -3077,11 +3072,8 @@ static __be32 nfsd4_encode_splice_read( __be32 nfserr; __be32 *p = xdr->p - 2; - /* - * Don't inline pages unless we know there's room for eof, - * count, and possible padding: - */ - if (xdr->end - xdr->p < 3) + /* Make sure there will be room for padding if needed */ + if (xdr->end - xdr->p < 1) return nfserr_resource; nfserr = nfsd_splice_read(read->rd_rqstp, file, @@ -3147,9 +3139,7 @@ static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp, len = maxcount; v = 0; - thislen = (void *)xdr->end - (void *)xdr->p; - if (len < thislen) - thislen = len; + thislen = min_t(long, len, ((void *)xdr->end - (void *)xdr->p)); p = xdr_reserve_space(xdr, (thislen+3)&~3); WARN_ON_ONCE(!p); resp->rqstp->rq_vec[v].iov_base = p; @@ -3216,10 +3206,8 @@ nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr, xdr_commit_encode(xdr); maxcount = svc_max_payload(resp->rqstp); - if (maxcount > xdr->buf->buflen - xdr->buf->len) - maxcount = xdr->buf->buflen - xdr->buf->len; - if (maxcount > read->rd_length) - maxcount = read->rd_length; + maxcount = min_t(unsigned long, maxcount, (xdr->buf->buflen - xdr->buf->len)); + maxcount = min_t(unsigned long, maxcount, read->rd_length); if (!read->rd_filp) { err = nfsd_get_tmp_read_open(resp->rqstp, read->rd_fhp, @@ -3937,8 +3925,6 @@ status: * * XDR note: do not encode rp->rp_buflen: the buffer contains the * previously sent already encoded operation. - * - * called with nfs4_lock_state() held */ void nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op) @@ -3977,9 +3963,8 @@ int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp) kfree(args->tmpp); args->tmpp = NULL; while (args->to_free) { - struct tmpbuf *tb = args->to_free; + struct svcxdr_tmpbuf *tb = args->to_free; args->to_free = tb->next; - tb->release(tb->buf); kfree(tb); } return 1; @@ -4012,7 +3997,6 @@ nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compo /* * All that remains is to write the tag and operation count... */ - struct nfsd4_compound_state *cs = &resp->cstate; struct xdr_buf *buf = resp->xdr.buf; WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len + @@ -4026,19 +4010,7 @@ nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compo p += XDR_QUADLEN(resp->taglen); *p++ = htonl(resp->opcnt); - if (nfsd4_has_session(cs)) { - struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); - struct nfs4_client *clp = cs->session->se_client; - if (cs->status != nfserr_replay_cache) { - nfsd4_store_cache_entry(resp); - cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE; - } - /* Renew the clientid on success and on replay */ - spin_lock(&nn->client_lock); - nfsd4_put_session(cs->session); - spin_unlock(&nn->client_lock); - put_client_renew(clp); - } + nfsd4_sequence_done(resp); return 1; } diff --git a/fs/nfsd/nfscache.c b/fs/nfsd/nfscache.c index 6040da8830ff..ff9567633245 100644 --- a/fs/nfsd/nfscache.c +++ b/fs/nfsd/nfscache.c @@ -221,7 +221,12 @@ static void hash_refile(struct svc_cacherep *rp) { hlist_del_init(&rp->c_hash); - hlist_add_head(&rp->c_hash, cache_hash + hash_32(rp->c_xid, maskbits)); + /* + * No point in byte swapping c_xid since we're just using it to pick + * a hash bucket. + */ + hlist_add_head(&rp->c_hash, cache_hash + + hash_32((__force u32)rp->c_xid, maskbits)); } /* @@ -356,7 +361,11 @@ nfsd_cache_search(struct svc_rqst *rqstp, __wsum csum) struct hlist_head *rh; unsigned int entries = 0; - rh = &cache_hash[hash_32(rqstp->rq_xid, maskbits)]; + /* + * No point in byte swapping rq_xid since we're just using it to pick + * a hash bucket. + */ + rh = &cache_hash[hash_32((__force u32)rqstp->rq_xid, maskbits)]; hlist_for_each_entry(rp, rh, c_hash) { ++entries; if (nfsd_cache_match(rqstp, csum, rp)) { diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c index 51844048937f..4e042105fb6e 100644 --- a/fs/nfsd/nfsctl.c +++ b/fs/nfsd/nfsctl.c @@ -39,6 +39,7 @@ enum { NFSD_Versions, NFSD_Ports, NFSD_MaxBlkSize, + NFSD_MaxConnections, NFSD_SupportedEnctypes, /* * The below MUST come last. Otherwise we leave a hole in nfsd_files[] @@ -62,6 +63,7 @@ static ssize_t write_pool_threads(struct file *file, char *buf, size_t size); static ssize_t write_versions(struct file *file, char *buf, size_t size); static ssize_t write_ports(struct file *file, char *buf, size_t size); static ssize_t write_maxblksize(struct file *file, char *buf, size_t size); +static ssize_t write_maxconn(struct file *file, char *buf, size_t size); #ifdef CONFIG_NFSD_V4 static ssize_t write_leasetime(struct file *file, char *buf, size_t size); static ssize_t write_gracetime(struct file *file, char *buf, size_t size); @@ -77,6 +79,7 @@ static ssize_t (*write_op[])(struct file *, char *, size_t) = { [NFSD_Versions] = write_versions, [NFSD_Ports] = write_ports, [NFSD_MaxBlkSize] = write_maxblksize, + [NFSD_MaxConnections] = write_maxconn, #ifdef CONFIG_NFSD_V4 [NFSD_Leasetime] = write_leasetime, [NFSD_Gracetime] = write_gracetime, @@ -369,8 +372,7 @@ static ssize_t write_filehandle(struct file *file, char *buf, size_t size) if (maxsize < NFS_FHSIZE) return -EINVAL; - if (maxsize > NFS3_FHSIZE) - maxsize = NFS3_FHSIZE; + maxsize = min(maxsize, NFS3_FHSIZE); if (qword_get(&mesg, mesg, size)>0) return -EINVAL; @@ -871,10 +873,8 @@ static ssize_t write_maxblksize(struct file *file, char *buf, size_t size) /* force bsize into allowed range and * required alignment. */ - if (bsize < 1024) - bsize = 1024; - if (bsize > NFSSVC_MAXBLKSIZE) - bsize = NFSSVC_MAXBLKSIZE; + bsize = max_t(int, bsize, 1024); + bsize = min_t(int, bsize, NFSSVC_MAXBLKSIZE); bsize &= ~(1024-1); mutex_lock(&nfsd_mutex); if (nn->nfsd_serv) { @@ -889,6 +889,44 @@ static ssize_t write_maxblksize(struct file *file, char *buf, size_t size) nfsd_max_blksize); } +/** + * write_maxconn - Set or report the current max number of connections + * + * Input: + * buf: ignored + * size: zero + * OR + * + * Input: + * buf: C string containing an unsigned + * integer value representing the new + * number of max connections + * size: non-zero length of C string in @buf + * Output: + * On success: passed-in buffer filled with '\n'-terminated C string + * containing numeric value of max_connections setting + * for this net namespace; + * return code is the size in bytes of the string + * On error: return code is zero or a negative errno value + */ +static ssize_t write_maxconn(struct file *file, char *buf, size_t size) +{ + char *mesg = buf; + struct net *net = file->f_dentry->d_sb->s_fs_info; + struct nfsd_net *nn = net_generic(net, nfsd_net_id); + unsigned int maxconn = nn->max_connections; + + if (size > 0) { + int rv = get_uint(&mesg, &maxconn); + + if (rv) + return rv; + nn->max_connections = maxconn; + } + + return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%u\n", maxconn); +} + #ifdef CONFIG_NFSD_V4 static ssize_t __nfsd4_write_time(struct file *file, char *buf, size_t size, time_t *time, struct nfsd_net *nn) @@ -1064,6 +1102,7 @@ static int nfsd_fill_super(struct super_block * sb, void * data, int silent) [NFSD_Versions] = {"versions", &transaction_ops, S_IWUSR|S_IRUSR}, [NFSD_Ports] = {"portlist", &transaction_ops, S_IWUSR|S_IRUGO}, [NFSD_MaxBlkSize] = {"max_block_size", &transaction_ops, S_IWUSR|S_IRUGO}, + [NFSD_MaxConnections] = {"max_connections", &transaction_ops, S_IWUSR|S_IRUGO}, #if defined(CONFIG_SUNRPC_GSS) || defined(CONFIG_SUNRPC_GSS_MODULE) [NFSD_SupportedEnctypes] = {"supported_krb5_enctypes", &supported_enctypes_ops, S_IRUGO}, #endif /* CONFIG_SUNRPC_GSS or CONFIG_SUNRPC_GSS_MODULE */ diff --git a/fs/nfsd/nfsfh.c b/fs/nfsd/nfsfh.c index ec8393418154..e883a5868be6 100644 --- a/fs/nfsd/nfsfh.c +++ b/fs/nfsd/nfsfh.c @@ -162,7 +162,14 @@ static __be32 nfsd_set_fh_dentry(struct svc_rqst *rqstp, struct svc_fh *fhp) /* deprecated, convert to type 3 */ len = key_len(FSID_ENCODE_DEV)/4; fh->fh_fsid_type = FSID_ENCODE_DEV; - fh->fh_fsid[0] = new_encode_dev(MKDEV(ntohl(fh->fh_fsid[0]), ntohl(fh->fh_fsid[1]))); + /* + * struct knfsd_fh uses host-endian fields, which are + * sometimes used to hold net-endian values. This + * confuses sparse, so we must use __force here to + * keep it from complaining. + */ + fh->fh_fsid[0] = new_encode_dev(MKDEV(ntohl((__force __be32)fh->fh_fsid[0]), + ntohl((__force __be32)fh->fh_fsid[1]))); fh->fh_fsid[1] = fh->fh_fsid[2]; } data_left -= len; @@ -539,8 +546,7 @@ fh_compose(struct svc_fh *fhp, struct svc_export *exp, struct dentry *dentry, dentry); fhp->fh_dentry = dget(dentry); /* our internal copy */ - fhp->fh_export = exp; - cache_get(&exp->h); + fhp->fh_export = exp_get(exp); if (fhp->fh_handle.fh_version == 0xca) { /* old style filehandle please */ diff --git a/fs/nfsd/nfsfh.h b/fs/nfsd/nfsfh.h index 2e89e70ac15c..08236d70c667 100644 --- a/fs/nfsd/nfsfh.h +++ b/fs/nfsd/nfsfh.h @@ -73,8 +73,15 @@ enum fsid_source { extern enum fsid_source fsid_source(struct svc_fh *fhp); -/* This might look a little large to "inline" but in all calls except +/* + * This might look a little large to "inline" but in all calls except * one, 'vers' is constant so moste of the function disappears. + * + * In some cases the values are considered to be host endian and in + * others, net endian. fsidv is always considered to be u32 as the + * callers don't know which it will be. So we must use __force to keep + * sparse from complaining. Since these values are opaque to the + * client, that shouldn't be a problem. */ static inline void mk_fsid(int vers, u32 *fsidv, dev_t dev, ino_t ino, u32 fsid, unsigned char *uuid) @@ -82,7 +89,7 @@ static inline void mk_fsid(int vers, u32 *fsidv, dev_t dev, ino_t ino, u32 *up; switch(vers) { case FSID_DEV: - fsidv[0] = htonl((MAJOR(dev)<<16) | + fsidv[0] = (__force __u32)htonl((MAJOR(dev)<<16) | MINOR(dev)); fsidv[1] = ino_t_to_u32(ino); break; @@ -90,8 +97,8 @@ static inline void mk_fsid(int vers, u32 *fsidv, dev_t dev, ino_t ino, fsidv[0] = fsid; break; case FSID_MAJOR_MINOR: - fsidv[0] = htonl(MAJOR(dev)); - fsidv[1] = htonl(MINOR(dev)); + fsidv[0] = (__force __u32)htonl(MAJOR(dev)); + fsidv[1] = (__force __u32)htonl(MINOR(dev)); fsidv[2] = ino_t_to_u32(ino); break; diff --git a/fs/nfsd/nfsproc.c b/fs/nfsd/nfsproc.c index 54c6b3d3cc79..b8680738f588 100644 --- a/fs/nfsd/nfsproc.c +++ b/fs/nfsd/nfsproc.c @@ -403,12 +403,13 @@ nfsd_proc_symlink(struct svc_rqst *rqstp, struct nfsd_symlinkargs *argp, fh_init(&newfh, NFS_FHSIZE); /* - * Create the link, look up new file and set attrs. + * Crazy hack: the request fits in a page, and already-decoded + * attributes follow argp->tname, so it's safe to just write a + * null to ensure it's null-terminated: */ + argp->tname[argp->tlen] = '\0'; nfserr = nfsd_symlink(rqstp, &argp->ffh, argp->fname, argp->flen, - argp->tname, argp->tlen, - &newfh, &argp->attrs); - + argp->tname, &newfh); fh_put(&argp->ffh); fh_put(&newfh); @@ -716,6 +717,7 @@ nfserrno (int errno) { nfserr_noent, -ENOENT }, { nfserr_io, -EIO }, { nfserr_nxio, -ENXIO }, + { nfserr_fbig, -E2BIG }, { nfserr_acces, -EACCES }, { nfserr_exist, -EEXIST }, { nfserr_xdev, -EXDEV }, @@ -743,6 +745,7 @@ nfserrno (int errno) { nfserr_notsupp, -EOPNOTSUPP }, { nfserr_toosmall, -ETOOSMALL }, { nfserr_serverfault, -ESERVERFAULT }, + { nfserr_serverfault, -ENFILE }, }; int i; @@ -750,7 +753,7 @@ nfserrno (int errno) if (nfs_errtbl[i].syserr == errno) return nfs_errtbl[i].nfserr; } - printk (KERN_INFO "nfsd: non-standard errno: %d\n", errno); + WARN(1, "nfsd: non-standard errno: %d\n", errno); return nfserr_io; } diff --git a/fs/nfsd/nfssvc.c b/fs/nfsd/nfssvc.c index 1879e43f2868..752d56bbe0ba 100644 --- a/fs/nfsd/nfssvc.c +++ b/fs/nfsd/nfssvc.c @@ -221,7 +221,8 @@ static int nfsd_startup_generic(int nrservs) */ ret = nfsd_racache_init(2*nrservs); if (ret) - return ret; + goto dec_users; + ret = nfs4_state_start(); if (ret) goto out_racache; @@ -229,6 +230,8 @@ static int nfsd_startup_generic(int nrservs) out_racache: nfsd_racache_shutdown(); +dec_users: + nfsd_users--; return ret; } @@ -405,6 +408,7 @@ int nfsd_create_serv(struct net *net) if (nn->nfsd_serv == NULL) return -ENOMEM; + nn->nfsd_serv->sv_maxconn = nn->max_connections; error = svc_bind(nn->nfsd_serv, net); if (error < 0) { svc_destroy(nn->nfsd_serv); @@ -469,8 +473,7 @@ int nfsd_set_nrthreads(int n, int *nthreads, struct net *net) /* enforce a global maximum number of threads */ tot = 0; for (i = 0; i < n; i++) { - if (nthreads[i] > NFSD_MAXSERVS) - nthreads[i] = NFSD_MAXSERVS; + nthreads[i] = min(nthreads[i], NFSD_MAXSERVS); tot += nthreads[i]; } if (tot > NFSD_MAXSERVS) { @@ -519,11 +522,11 @@ nfsd_svc(int nrservs, struct net *net) mutex_lock(&nfsd_mutex); dprintk("nfsd: creating service\n"); - if (nrservs <= 0) - nrservs = 0; - if (nrservs > NFSD_MAXSERVS) - nrservs = NFSD_MAXSERVS; + + nrservs = max(nrservs, 0); + nrservs = min(nrservs, NFSD_MAXSERVS); error = 0; + if (nrservs == 0 && nn->nfsd_serv == NULL) goto out; @@ -564,6 +567,7 @@ nfsd(void *vrqstp) struct svc_rqst *rqstp = (struct svc_rqst *) vrqstp; struct svc_xprt *perm_sock = list_entry(rqstp->rq_server->sv_permsocks.next, typeof(struct svc_xprt), xpt_list); struct net *net = perm_sock->xpt_net; + struct nfsd_net *nn = net_generic(net, nfsd_net_id); int err; /* Lock module and set up kernel thread */ @@ -597,6 +601,9 @@ nfsd(void *vrqstp) * The main request loop */ for (;;) { + /* Update sv_maxconn if it has changed */ + rqstp->rq_server->sv_maxconn = nn->max_connections; + /* * Find a socket with data available and call its * recvfrom routine. diff --git a/fs/nfsd/nfsxdr.c b/fs/nfsd/nfsxdr.c index 1ac306b769df..412d7061f9e5 100644 --- a/fs/nfsd/nfsxdr.c +++ b/fs/nfsd/nfsxdr.c @@ -257,8 +257,7 @@ nfssvc_decode_readargs(struct svc_rqst *rqstp, __be32 *p, len = args->count = ntohl(*p++); p++; /* totalcount - unused */ - if (len > NFSSVC_MAXBLKSIZE_V2) - len = NFSSVC_MAXBLKSIZE_V2; + len = min_t(unsigned int, len, NFSSVC_MAXBLKSIZE_V2); /* set up somewhere to store response. * We take pages, put them on reslist and include in iovec @@ -268,7 +267,7 @@ nfssvc_decode_readargs(struct svc_rqst *rqstp, __be32 *p, struct page *p = *(rqstp->rq_next_page++); rqstp->rq_vec[v].iov_base = page_address(p); - rqstp->rq_vec[v].iov_len = len < PAGE_SIZE?len:PAGE_SIZE; + rqstp->rq_vec[v].iov_len = min_t(unsigned int, len, PAGE_SIZE); len -= rqstp->rq_vec[v].iov_len; v++; } @@ -400,9 +399,7 @@ nfssvc_decode_readdirargs(struct svc_rqst *rqstp, __be32 *p, return 0; args->cookie = ntohl(*p++); args->count = ntohl(*p++); - if (args->count > PAGE_SIZE) - args->count = PAGE_SIZE; - + args->count = min_t(u32, args->count, PAGE_SIZE); args->buffer = page_address(*(rqstp->rq_next_page++)); return xdr_argsize_check(rqstp, p); @@ -516,10 +513,11 @@ nfssvc_encode_entry(void *ccdv, const char *name, } if (cd->offset) *cd->offset = htonl(offset); - if (namlen > NFS2_MAXNAMLEN) - namlen = NFS2_MAXNAMLEN;/* truncate filename */ + /* truncate filename */ + namlen = min(namlen, NFS2_MAXNAMLEN); slen = XDR_QUADLEN(namlen); + if ((buflen = cd->buflen - slen - 4) < 0) { cd->common.err = nfserr_toosmall; return -EINVAL; diff --git a/fs/nfsd/state.h b/fs/nfsd/state.h index 374c66283ac5..4a89e00d7461 100644 --- a/fs/nfsd/state.h +++ b/fs/nfsd/state.h @@ -72,7 +72,13 @@ struct nfsd4_callback { bool cb_done; }; +/* + * A core object that represents a "common" stateid. These are generally + * embedded within the different (more specific) stateid objects and contain + * fields that are of general use to any stateid. + */ struct nfs4_stid { + atomic_t sc_count; #define NFS4_OPEN_STID 1 #define NFS4_LOCK_STID 2 #define NFS4_DELEG_STID 4 @@ -80,22 +86,43 @@ struct nfs4_stid { #define NFS4_CLOSED_STID 8 /* For a deleg stateid kept around only to process free_stateid's: */ #define NFS4_REVOKED_DELEG_STID 16 +#define NFS4_CLOSED_DELEG_STID 32 unsigned char sc_type; stateid_t sc_stateid; struct nfs4_client *sc_client; + struct nfs4_file *sc_file; + void (*sc_free)(struct nfs4_stid *); }; +/* + * Represents a delegation stateid. The nfs4_client holds references to these + * and they are put when it is being destroyed or when the delegation is + * returned by the client: + * + * o 1 reference as long as a delegation is still in force (taken when it's + * alloc'd, put when it's returned or revoked) + * + * o 1 reference as long as a recall rpc is in progress (taken when the lease + * is broken, put when the rpc exits) + * + * o 1 more ephemeral reference for each nfsd thread currently doing something + * with that delegation without holding the cl_lock + * + * If the server attempts to recall a delegation and the client doesn't do so + * before a timeout, the server may also revoke the delegation. In that case, + * the object will either be destroyed (v4.0) or moved to a per-client list of + * revoked delegations (v4.1+). + * + * This object is a superset of the nfs4_stid. + */ struct nfs4_delegation { struct nfs4_stid dl_stid; /* must be first field */ struct list_head dl_perfile; struct list_head dl_perclnt; struct list_head dl_recall_lru; /* delegation recalled */ - atomic_t dl_count; /* ref count */ - struct nfs4_file *dl_file; u32 dl_type; time_t dl_time; /* For recall: */ - struct knfsd_fh dl_fh; int dl_retries; struct nfsd4_callback dl_recall; }; @@ -194,6 +221,11 @@ struct nfsd4_conn { unsigned char cn_flags; }; +/* + * Representation of a v4.1+ session. These are refcounted in a similar fashion + * to the nfs4_client. References are only taken when the server is actively + * working on the object (primarily during the processing of compounds). + */ struct nfsd4_session { atomic_t se_ref; struct list_head se_hash; /* hash by sessionid */ @@ -212,8 +244,6 @@ struct nfsd4_session { struct nfsd4_slot *se_slots[]; /* forward channel slots */ }; -extern void nfsd4_put_session(struct nfsd4_session *ses); - /* formatted contents of nfs4_sessionid */ struct nfsd4_sessionid { clientid_t clientid; @@ -225,17 +255,35 @@ struct nfsd4_sessionid { /* * struct nfs4_client - one per client. Clientids live here. - * o Each nfs4_client is hashed by clientid. * - * o Each nfs4_clients is also hashed by name - * (the opaque quantity initially sent by the client to identify itself). + * The initial object created by an NFS client using SETCLIENTID (for NFSv4.0) + * or EXCHANGE_ID (for NFSv4.1+). These objects are refcounted and timestamped. + * Each nfsd_net_ns object contains a set of these and they are tracked via + * short and long form clientid. They are hashed and searched for under the + * per-nfsd_net client_lock spinlock. + * + * References to it are only held during the processing of compounds, and in + * certain other operations. In their "resting state" they have a refcount of + * 0. If they are not renewed within a lease period, they become eligible for + * destruction by the laundromat. + * + * These objects can also be destroyed prematurely by the fault injection code, + * or if the client sends certain forms of SETCLIENTID or EXCHANGE_ID updates. + * Care is taken *not* to do this however when the objects have an elevated + * refcount. + * + * o Each nfs4_client is hashed by clientid + * + * o Each nfs4_clients is also hashed by name (the opaque quantity initially + * sent by the client to identify itself). * - * o cl_perclient list is used to ensure no dangling stateowner references - * when we expire the nfs4_client + * o cl_perclient list is used to ensure no dangling stateowner references + * when we expire the nfs4_client */ struct nfs4_client { struct list_head cl_idhash; /* hash by cl_clientid.id */ struct rb_node cl_namenode; /* link into by-name trees */ + struct list_head *cl_ownerstr_hashtbl; struct list_head cl_openowners; struct idr cl_stateids; /* stateid lookup */ struct list_head cl_delegations; @@ -329,21 +377,43 @@ struct nfs4_replay { unsigned int rp_buflen; char *rp_buf; struct knfsd_fh rp_openfh; + struct mutex rp_mutex; char rp_ibuf[NFSD4_REPLAY_ISIZE]; }; +struct nfs4_stateowner; + +struct nfs4_stateowner_operations { + void (*so_unhash)(struct nfs4_stateowner *); + void (*so_free)(struct nfs4_stateowner *); +}; + +/* + * A core object that represents either an open or lock owner. The object and + * lock owner objects have one of these embedded within them. Refcounts and + * other fields common to both owner types are contained within these + * structures. + */ struct nfs4_stateowner { - struct list_head so_strhash; /* hash by op_name */ - struct list_head so_stateids; - struct nfs4_client * so_client; - /* after increment in ENCODE_SEQID_OP_TAIL, represents the next + struct list_head so_strhash; + struct list_head so_stateids; + struct nfs4_client *so_client; + const struct nfs4_stateowner_operations *so_ops; + /* after increment in nfsd4_bump_seqid, represents the next * sequence id expected from the client: */ - u32 so_seqid; - struct xdr_netobj so_owner; /* open owner name */ - struct nfs4_replay so_replay; - bool so_is_open_owner; + atomic_t so_count; + u32 so_seqid; + struct xdr_netobj so_owner; /* open owner name */ + struct nfs4_replay so_replay; + bool so_is_open_owner; }; +/* + * When a file is opened, the client provides an open state owner opaque string + * that indicates the "owner" of that open. These objects are refcounted. + * References to it are held by each open state associated with it. This object + * is a superset of the nfs4_stateowner struct. + */ struct nfs4_openowner { struct nfs4_stateowner oo_owner; /* must be first field */ struct list_head oo_perclient; @@ -358,15 +428,17 @@ struct nfs4_openowner { struct nfs4_ol_stateid *oo_last_closed_stid; time_t oo_time; /* time of placement on so_close_lru */ #define NFS4_OO_CONFIRMED 1 -#define NFS4_OO_NEW 4 unsigned char oo_flags; }; +/* + * Represents a generic "lockowner". Similar to an openowner. References to it + * are held by the lock stateids that are created on its behalf. This object is + * a superset of the nfs4_stateowner struct (or would be if it needed any extra + * fields). + */ struct nfs4_lockowner { struct nfs4_stateowner lo_owner; /* must be first element */ - struct list_head lo_owner_ino_hash; /* hash by owner,file */ - struct list_head lo_perstateid; - struct list_head lo_list; /* for temporary uses */ }; static inline struct nfs4_openowner * openowner(struct nfs4_stateowner *so) @@ -379,9 +451,17 @@ static inline struct nfs4_lockowner * lockowner(struct nfs4_stateowner *so) return container_of(so, struct nfs4_lockowner, lo_owner); } -/* nfs4_file: a file opened by some number of (open) nfs4_stateowners. */ +/* + * nfs4_file: a file opened by some number of (open) nfs4_stateowners. + * + * These objects are global. nfsd only keeps one instance of a nfs4_file per + * inode (though it may keep multiple file descriptors open per inode). These + * are tracked in the file_hashtbl which is protected by the state_lock + * spinlock. + */ struct nfs4_file { atomic_t fi_ref; + spinlock_t fi_lock; struct hlist_node fi_hash; /* hash by "struct inode *" */ struct list_head fi_stateids; struct list_head fi_delegations; @@ -395,49 +475,36 @@ struct nfs4_file { * + 1 to both of the above if NFS4_SHARE_ACCESS_BOTH is set. */ atomic_t fi_access[2]; + u32 fi_share_deny; struct file *fi_deleg_file; struct file_lock *fi_lease; atomic_t fi_delegees; - struct inode *fi_inode; + struct knfsd_fh fi_fhandle; bool fi_had_conflict; }; -/* XXX: for first cut may fall back on returning file that doesn't work - * at all? */ -static inline struct file *find_writeable_file(struct nfs4_file *f) -{ - if (f->fi_fds[O_WRONLY]) - return f->fi_fds[O_WRONLY]; - return f->fi_fds[O_RDWR]; -} - -static inline struct file *find_readable_file(struct nfs4_file *f) -{ - if (f->fi_fds[O_RDONLY]) - return f->fi_fds[O_RDONLY]; - return f->fi_fds[O_RDWR]; -} - -static inline struct file *find_any_file(struct nfs4_file *f) -{ - if (f->fi_fds[O_RDWR]) - return f->fi_fds[O_RDWR]; - else if (f->fi_fds[O_WRONLY]) - return f->fi_fds[O_WRONLY]; - else - return f->fi_fds[O_RDONLY]; -} - -/* "ol" stands for "Open or Lock". Better suggestions welcome. */ +/* + * A generic struct representing either a open or lock stateid. The nfs4_client + * holds a reference to each of these objects, and they in turn hold a + * reference to their respective stateowners. The client's reference is + * released in response to a close or unlock (depending on whether it's an open + * or lock stateid) or when the client is being destroyed. + * + * In the case of v4.0 open stateids, these objects are preserved for a little + * while after close in order to handle CLOSE replays. Those are eventually + * reclaimed via a LRU scheme by the laundromat. + * + * This object is a superset of the nfs4_stid. "ol" stands for "Open or Lock". + * Better suggestions welcome. + */ struct nfs4_ol_stateid { struct nfs4_stid st_stid; /* must be first field */ struct list_head st_perfile; struct list_head st_perstateowner; - struct list_head st_lockowners; + struct list_head st_locks; struct nfs4_stateowner * st_stateowner; - struct nfs4_file * st_file; - unsigned long st_access_bmap; - unsigned long st_deny_bmap; + unsigned char st_access_bmap; + unsigned char st_deny_bmap; struct nfs4_ol_stateid * st_openstp; }; @@ -456,15 +523,16 @@ struct nfsd_net; extern __be32 nfs4_preprocess_stateid_op(struct net *net, struct nfsd4_compound_state *cstate, stateid_t *stateid, int flags, struct file **filp); -extern void nfs4_lock_state(void); -extern void nfs4_unlock_state(void); +void nfs4_put_stid(struct nfs4_stid *s); void nfs4_remove_reclaim_record(struct nfs4_client_reclaim *, struct nfsd_net *); extern void nfs4_release_reclaim(struct nfsd_net *); extern struct nfs4_client_reclaim *nfsd4_find_reclaim_client(const char *recdir, struct nfsd_net *nn); -extern __be32 nfs4_check_open_reclaim(clientid_t *clid, bool sessions, struct nfsd_net *nn); +extern __be32 nfs4_check_open_reclaim(clientid_t *clid, + struct nfsd4_compound_state *cstate, struct nfsd_net *nn); extern int set_callback_cred(void); -extern void nfsd4_init_callback(struct nfsd4_callback *); +void nfsd4_run_cb_null(struct work_struct *w); +void nfsd4_run_cb_recall(struct work_struct *w); extern void nfsd4_probe_callback(struct nfs4_client *clp); extern void nfsd4_probe_callback_sync(struct nfs4_client *clp); extern void nfsd4_change_callback(struct nfs4_client *clp, struct nfs4_cb_conn *); @@ -472,11 +540,10 @@ extern void nfsd4_cb_recall(struct nfs4_delegation *dp); extern int nfsd4_create_callback_queue(void); extern void nfsd4_destroy_callback_queue(void); extern void nfsd4_shutdown_callback(struct nfs4_client *); -extern void nfs4_put_delegation(struct nfs4_delegation *dp); +extern void nfsd4_prepare_cb_recall(struct nfs4_delegation *dp); extern struct nfs4_client_reclaim *nfs4_client_to_reclaim(const char *name, struct nfsd_net *nn); extern bool nfs4_has_reclaimed_state(const char *name, struct nfsd_net *nn); -extern void put_client_renew(struct nfs4_client *clp); /* nfs4recover operations */ extern int nfsd4_client_tracking_init(struct net *net); @@ -490,19 +557,24 @@ extern void nfsd4_record_grace_done(struct nfsd_net *nn, time_t boot_time); #ifdef CONFIG_NFSD_FAULT_INJECTION int nfsd_fault_inject_init(void); void nfsd_fault_inject_cleanup(void); -u64 nfsd_for_n_state(u64, u64 (*)(struct nfs4_client *, u64)); -struct nfs4_client *nfsd_find_client(struct sockaddr_storage *, size_t); - -u64 nfsd_forget_client(struct nfs4_client *, u64); -u64 nfsd_forget_client_locks(struct nfs4_client*, u64); -u64 nfsd_forget_client_openowners(struct nfs4_client *, u64); -u64 nfsd_forget_client_delegations(struct nfs4_client *, u64); -u64 nfsd_recall_client_delegations(struct nfs4_client *, u64); - -u64 nfsd_print_client(struct nfs4_client *, u64); -u64 nfsd_print_client_locks(struct nfs4_client *, u64); -u64 nfsd_print_client_openowners(struct nfs4_client *, u64); -u64 nfsd_print_client_delegations(struct nfs4_client *, u64); + +u64 nfsd_inject_print_clients(void); +u64 nfsd_inject_forget_client(struct sockaddr_storage *, size_t); +u64 nfsd_inject_forget_clients(u64); + +u64 nfsd_inject_print_locks(void); +u64 nfsd_inject_forget_client_locks(struct sockaddr_storage *, size_t); +u64 nfsd_inject_forget_locks(u64); + +u64 nfsd_inject_print_openowners(void); +u64 nfsd_inject_forget_client_openowners(struct sockaddr_storage *, size_t); +u64 nfsd_inject_forget_openowners(u64); + +u64 nfsd_inject_print_delegations(void); +u64 nfsd_inject_forget_client_delegations(struct sockaddr_storage *, size_t); +u64 nfsd_inject_forget_delegations(u64); +u64 nfsd_inject_recall_client_delegations(struct sockaddr_storage *, size_t); +u64 nfsd_inject_recall_delegations(u64); #else /* CONFIG_NFSD_FAULT_INJECTION */ static inline int nfsd_fault_inject_init(void) { return 0; } static inline void nfsd_fault_inject_cleanup(void) {} diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c index 140c496f612c..f501a9b5c9df 100644 --- a/fs/nfsd/vfs.c +++ b/fs/nfsd/vfs.c @@ -189,8 +189,7 @@ nfsd_lookup_dentry(struct svc_rqst *rqstp, struct svc_fh *fhp, dprintk("nfsd: nfsd_lookup(fh %s, %.*s)\n", SVCFH_fmt(fhp), len,name); dparent = fhp->fh_dentry; - exp = fhp->fh_export; - exp_get(exp); + exp = exp_get(fhp->fh_export); /* Lookup the name, but don't follow links */ if (isdotent(name, len)) { @@ -464,7 +463,7 @@ out_put_write_access: if (size_change) put_write_access(inode); if (!err) - commit_metadata(fhp); + err = nfserrno(commit_metadata(fhp)); out: return err; } @@ -820,7 +819,8 @@ static int nfsd_direct_splice_actor(struct pipe_inode_info *pipe, return __splice_from_pipe(pipe, sd, nfsd_splice_actor); } -__be32 nfsd_finish_read(struct file *file, unsigned long *count, int host_err) +static __be32 +nfsd_finish_read(struct file *file, unsigned long *count, int host_err) { if (host_err >= 0) { nfsdstats.io_read += host_err; @@ -831,7 +831,7 @@ __be32 nfsd_finish_read(struct file *file, unsigned long *count, int host_err) return nfserrno(host_err); } -int nfsd_splice_read(struct svc_rqst *rqstp, +__be32 nfsd_splice_read(struct svc_rqst *rqstp, struct file *file, loff_t offset, unsigned long *count) { struct splice_desc sd = { @@ -847,7 +847,7 @@ int nfsd_splice_read(struct svc_rqst *rqstp, return nfsd_finish_read(file, count, host_err); } -int nfsd_readv(struct file *file, loff_t offset, struct kvec *vec, int vlen, +__be32 nfsd_readv(struct file *file, loff_t offset, struct kvec *vec, int vlen, unsigned long *count) { mm_segment_t oldfs; @@ -1121,7 +1121,8 @@ nfsd_create_setattr(struct svc_rqst *rqstp, struct svc_fh *resfhp, iap->ia_valid &= ~(ATTR_UID|ATTR_GID); if (iap->ia_valid) return nfsd_setattr(rqstp, resfhp, iap, 0, (time_t)0); - return 0; + /* Callers expect file metadata to be committed here */ + return nfserrno(commit_metadata(resfhp)); } /* HPUX client sometimes creates a file in mode 000, and sets size to 0. @@ -1253,9 +1254,10 @@ nfsd_create(struct svc_rqst *rqstp, struct svc_fh *fhp, err = nfsd_create_setattr(rqstp, resfhp, iap); /* - * nfsd_setattr already committed the child. Transactional filesystems - * had a chance to commit changes for both parent and child - * simultaneously making the following commit_metadata a noop. + * nfsd_create_setattr already committed the child. Transactional + * filesystems had a chance to commit changes for both parent and + * child * simultaneously making the following commit_metadata a + * noop. */ err2 = nfserrno(commit_metadata(fhp)); if (err2) @@ -1426,7 +1428,8 @@ do_nfsd_create(struct svc_rqst *rqstp, struct svc_fh *fhp, err = nfsd_create_setattr(rqstp, resfhp, iap); /* - * nfsd_setattr already committed the child (and possibly also the parent). + * nfsd_create_setattr already committed the child + * (and possibly also the parent). */ if (!err) err = nfserrno(commit_metadata(fhp)); @@ -1504,16 +1507,15 @@ out_nfserr: __be32 nfsd_symlink(struct svc_rqst *rqstp, struct svc_fh *fhp, char *fname, int flen, - char *path, int plen, - struct svc_fh *resfhp, - struct iattr *iap) + char *path, + struct svc_fh *resfhp) { struct dentry *dentry, *dnew; __be32 err, cerr; int host_err; err = nfserr_noent; - if (!flen || !plen) + if (!flen || path[0] == '\0') goto out; err = nfserr_exist; if (isdotent(fname, flen)) @@ -1534,18 +1536,7 @@ nfsd_symlink(struct svc_rqst *rqstp, struct svc_fh *fhp, if (IS_ERR(dnew)) goto out_nfserr; - if (unlikely(path[plen] != 0)) { - char *path_alloced = kmalloc(plen+1, GFP_KERNEL); - if (path_alloced == NULL) - host_err = -ENOMEM; - else { - strncpy(path_alloced, path, plen); - path_alloced[plen] = 0; - host_err = vfs_symlink(dentry->d_inode, dnew, path_alloced); - kfree(path_alloced); - } - } else - host_err = vfs_symlink(dentry->d_inode, dnew, path); + host_err = vfs_symlink(dentry->d_inode, dnew, path); err = nfserrno(host_err); if (!err) err = nfserrno(commit_metadata(fhp)); @@ -2093,8 +2084,7 @@ nfsd_racache_init(int cache_size) if (raparm_hash[0].pb_head) return 0; nperbucket = DIV_ROUND_UP(cache_size, RAPARM_HASH_SIZE); - if (nperbucket < 2) - nperbucket = 2; + nperbucket = max(2, nperbucket); cache_size = nperbucket * RAPARM_HASH_SIZE; dprintk("nfsd: allocating %d readahead buffers.\n", cache_size); diff --git a/fs/nfsd/vfs.h b/fs/nfsd/vfs.h index 91b6ae3f658b..c2ff3f14e5f6 100644 --- a/fs/nfsd/vfs.h +++ b/fs/nfsd/vfs.h @@ -74,9 +74,9 @@ struct raparms; __be32 nfsd_get_tmp_read_open(struct svc_rqst *, struct svc_fh *, struct file **, struct raparms **); void nfsd_put_tmp_read_open(struct file *, struct raparms *); -int nfsd_splice_read(struct svc_rqst *, +__be32 nfsd_splice_read(struct svc_rqst *, struct file *, loff_t, unsigned long *); -int nfsd_readv(struct file *, loff_t, struct kvec *, int, +__be32 nfsd_readv(struct file *, loff_t, struct kvec *, int, unsigned long *); __be32 nfsd_read(struct svc_rqst *, struct svc_fh *, loff_t, struct kvec *, int, unsigned long *); @@ -85,8 +85,8 @@ __be32 nfsd_write(struct svc_rqst *, struct svc_fh *,struct file *, __be32 nfsd_readlink(struct svc_rqst *, struct svc_fh *, char *, int *); __be32 nfsd_symlink(struct svc_rqst *, struct svc_fh *, - char *name, int len, char *path, int plen, - struct svc_fh *res, struct iattr *); + char *name, int len, char *path, + struct svc_fh *res); __be32 nfsd_link(struct svc_rqst *, struct svc_fh *, char *, int, struct svc_fh *); __be32 nfsd_rename(struct svc_rqst *, diff --git a/fs/nfsd/xdr4.h b/fs/nfsd/xdr4.h index 18cbb6d9c8a9..465e7799742a 100644 --- a/fs/nfsd/xdr4.h +++ b/fs/nfsd/xdr4.h @@ -55,6 +55,7 @@ struct nfsd4_compound_state { struct svc_fh current_fh; struct svc_fh save_fh; struct nfs4_stateowner *replay_owner; + struct nfs4_client *clp; /* For sessions DRC */ struct nfsd4_session *session; struct nfsd4_slot *slot; @@ -107,8 +108,8 @@ struct nfsd4_create { u32 cr_type; /* request */ union { /* request */ struct { - u32 namelen; - char *name; + u32 datalen; + char *data; } link; /* NF4LNK */ struct { u32 specdata1; @@ -121,8 +122,8 @@ struct nfsd4_create { struct nfs4_acl *cr_acl; struct xdr_netobj cr_label; }; -#define cr_linklen u.link.namelen -#define cr_linkname u.link.name +#define cr_datalen u.link.datalen +#define cr_data u.link.data #define cr_specdata1 u.dev.specdata1 #define cr_specdata2 u.dev.specdata2 @@ -478,6 +479,14 @@ struct nfsd4_op { bool nfsd4_cache_this_op(struct nfsd4_op *); +/* + * Memory needed just for the duration of processing one compound: + */ +struct svcxdr_tmpbuf { + struct svcxdr_tmpbuf *next; + char buf[]; +}; + struct nfsd4_compoundargs { /* scratch variables for XDR decode */ __be32 * p; @@ -486,11 +495,7 @@ struct nfsd4_compoundargs { int pagelen; __be32 tmp[8]; __be32 * tmpp; - struct tmpbuf { - struct tmpbuf *next; - void (*release)(const void *); - void *buf; - } *to_free; + struct svcxdr_tmpbuf *to_free; struct svc_rqst *rqstp; @@ -574,7 +579,6 @@ extern __be32 nfsd4_setclientid(struct svc_rqst *rqstp, extern __be32 nfsd4_setclientid_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *, struct nfsd4_setclientid_confirm *setclientid_confirm); -extern void nfsd4_store_cache_entry(struct nfsd4_compoundres *resp); extern __be32 nfsd4_exchange_id(struct svc_rqst *rqstp, struct nfsd4_compound_state *, struct nfsd4_exchange_id *); extern __be32 nfsd4_backchannel_ctl(struct svc_rqst *, struct nfsd4_compound_state *, struct nfsd4_backchannel_ctl *); @@ -585,6 +589,7 @@ extern __be32 nfsd4_create_session(struct svc_rqst *, extern __be32 nfsd4_sequence(struct svc_rqst *, struct nfsd4_compound_state *, struct nfsd4_sequence *); +extern void nfsd4_sequence_done(struct nfsd4_compoundres *resp); extern __be32 nfsd4_destroy_session(struct svc_rqst *, struct nfsd4_compound_state *, struct nfsd4_destroy_session *); @@ -594,7 +599,9 @@ extern __be32 nfsd4_process_open1(struct nfsd4_compound_state *, struct nfsd4_open *open, struct nfsd_net *nn); extern __be32 nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open); -extern void nfsd4_cleanup_open_state(struct nfsd4_open *open, __be32 status); +extern void nfsd4_cstate_clear_replay(struct nfsd4_compound_state *cstate); +extern void nfsd4_cleanup_open_state(struct nfsd4_compound_state *cstate, + struct nfsd4_open *open, __be32 status); extern __be32 nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *, struct nfsd4_open_confirm *oc); extern __be32 nfsd4_close(struct svc_rqst *rqstp, @@ -625,6 +632,7 @@ extern __be32 nfsd4_test_stateid(struct svc_rqst *rqstp, extern __be32 nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *, struct nfsd4_free_stateid *free_stateid); extern void nfsd4_bump_seqid(struct nfsd4_compound_state *, __be32 nfserr); + #endif /* diff --git a/include/linux/cred.h b/include/linux/cred.h index f61d6c8f5ef3..b2d0820837c4 100644 --- a/include/linux/cred.h +++ b/include/linux/cred.h @@ -259,6 +259,15 @@ static inline void put_cred(const struct cred *_cred) rcu_dereference_protected(current->cred, 1) /** + * current_real_cred - Access the current task's objective credentials + * + * Access the objective credentials of the current task. RCU-safe, + * since nobody else can modify it. + */ +#define current_real_cred() \ + rcu_dereference_protected(current->real_cred, 1) + +/** * __task_cred - Access a task's objective credentials * @task: The task to query * diff --git a/include/linux/sunrpc/svc.h b/include/linux/sunrpc/svc.h index 1bc7cd05b22e..cf61ecd148e0 100644 --- a/include/linux/sunrpc/svc.h +++ b/include/linux/sunrpc/svc.h @@ -236,7 +236,7 @@ struct svc_rqst { struct svc_cred rq_cred; /* auth info */ void * rq_xprt_ctxt; /* transport specific context ptr */ struct svc_deferred_req*rq_deferred; /* deferred request we are replaying */ - int rq_usedeferral; /* use deferral */ + bool rq_usedeferral; /* use deferral */ size_t rq_xprt_hlen; /* xprt header len */ struct xdr_buf rq_arg; @@ -277,7 +277,7 @@ struct svc_rqst { struct auth_domain * rq_gssclient; /* "gss/"-style peer info */ int rq_cachetype; struct svc_cacherep * rq_cacherep; /* cache info */ - int rq_splice_ok; /* turned off in gss privacy + bool rq_splice_ok; /* turned off in gss privacy * to prevent encrypting page * cache pages */ wait_queue_head_t rq_wait; /* synchronization */ diff --git a/include/linux/sunrpc/svc_rdma.h b/include/linux/sunrpc/svc_rdma.h index 5cf99a016368..975da754c778 100644 --- a/include/linux/sunrpc/svc_rdma.h +++ b/include/linux/sunrpc/svc_rdma.h @@ -174,8 +174,7 @@ struct svcxprt_rdma { * page size of 4k, or 32k * 2 ops / 4k = 16 outstanding RDMA_READ. */ #define RPCRDMA_ORD (64/4) #define RPCRDMA_SQ_DEPTH_MULT 8 -#define RPCRDMA_MAX_THREADS 16 -#define RPCRDMA_MAX_REQUESTS 16 +#define RPCRDMA_MAX_REQUESTS 32 #define RPCRDMA_MAX_REQ_SIZE 4096 /* svc_rdma_marshal.c */ diff --git a/include/linux/sunrpc/svc_xprt.h b/include/linux/sunrpc/svc_xprt.h index 7235040a19b2..ce6e4182a5b2 100644 --- a/include/linux/sunrpc/svc_xprt.h +++ b/include/linux/sunrpc/svc_xprt.h @@ -25,6 +25,7 @@ struct svc_xprt_ops { void (*xpo_detach)(struct svc_xprt *); void (*xpo_free)(struct svc_xprt *); int (*xpo_secure_port)(struct svc_rqst *); + void (*xpo_adjust_wspace)(struct svc_xprt *); }; struct svc_xprt_class { @@ -33,6 +34,7 @@ struct svc_xprt_class { struct svc_xprt_ops *xcl_ops; struct list_head xcl_list; u32 xcl_max_payload; + int xcl_ident; }; /* diff --git a/net/sunrpc/auth_gss/svcauth_gss.c b/net/sunrpc/auth_gss/svcauth_gss.c index 4ce5eccec1f6..c548ab213f76 100644 --- a/net/sunrpc/auth_gss/svcauth_gss.c +++ b/net/sunrpc/auth_gss/svcauth_gss.c @@ -886,7 +886,7 @@ unwrap_priv_data(struct svc_rqst *rqstp, struct xdr_buf *buf, u32 seq, struct gs u32 priv_len, maj_stat; int pad, saved_len, remaining_len, offset; - rqstp->rq_splice_ok = 0; + rqstp->rq_splice_ok = false; priv_len = svc_getnl(&buf->head[0]); if (rqstp->rq_deferred) { diff --git a/net/sunrpc/svc.c b/net/sunrpc/svc.c index 5de6801cd924..1db5007ddbce 100644 --- a/net/sunrpc/svc.c +++ b/net/sunrpc/svc.c @@ -1086,9 +1086,9 @@ svc_process_common(struct svc_rqst *rqstp, struct kvec *argv, struct kvec *resv) goto err_short_len; /* Will be turned off only in gss privacy case: */ - rqstp->rq_splice_ok = 1; + rqstp->rq_splice_ok = true; /* Will be turned off only when NFSv4 Sessions are used */ - rqstp->rq_usedeferral = 1; + rqstp->rq_usedeferral = true; rqstp->rq_dropme = false; /* Setup reply header */ diff --git a/net/sunrpc/svc_xprt.c b/net/sunrpc/svc_xprt.c index b4737fbdec13..6666c6745858 100644 --- a/net/sunrpc/svc_xprt.c +++ b/net/sunrpc/svc_xprt.c @@ -23,6 +23,7 @@ static int svc_deferred_recv(struct svc_rqst *rqstp); static struct cache_deferred_req *svc_defer(struct cache_req *req); static void svc_age_temp_xprts(unsigned long closure); static void svc_delete_xprt(struct svc_xprt *xprt); +static void svc_xprt_do_enqueue(struct svc_xprt *xprt); /* apparently the "standard" is that clients close * idle connections after 5 minutes, servers after @@ -222,11 +223,12 @@ static void svc_xprt_received(struct svc_xprt *xprt) if (!test_bit(XPT_BUSY, &xprt->xpt_flags)) return; /* As soon as we clear busy, the xprt could be closed and - * 'put', so we need a reference to call svc_xprt_enqueue with: + * 'put', so we need a reference to call svc_xprt_do_enqueue with: */ svc_xprt_get(xprt); + smp_mb__before_atomic(); clear_bit(XPT_BUSY, &xprt->xpt_flags); - svc_xprt_enqueue(xprt); + svc_xprt_do_enqueue(xprt); svc_xprt_put(xprt); } @@ -335,12 +337,7 @@ static bool svc_xprt_has_something_to_do(struct svc_xprt *xprt) return false; } -/* - * Queue up a transport with data pending. If there are idle nfsd - * processes, wake 'em up. - * - */ -void svc_xprt_enqueue(struct svc_xprt *xprt) +static void svc_xprt_do_enqueue(struct svc_xprt *xprt) { struct svc_pool *pool; struct svc_rqst *rqstp; @@ -398,6 +395,18 @@ void svc_xprt_enqueue(struct svc_xprt *xprt) out_unlock: spin_unlock_bh(&pool->sp_lock); } + +/* + * Queue up a transport with data pending. If there are idle nfsd + * processes, wake 'em up. + * + */ +void svc_xprt_enqueue(struct svc_xprt *xprt) +{ + if (test_bit(XPT_BUSY, &xprt->xpt_flags)) + return; + svc_xprt_do_enqueue(xprt); +} EXPORT_SYMBOL_GPL(svc_xprt_enqueue); /* @@ -439,6 +448,8 @@ void svc_reserve(struct svc_rqst *rqstp, int space) atomic_sub((rqstp->rq_reserved - space), &xprt->xpt_reserved); rqstp->rq_reserved = space; + if (xprt->xpt_ops->xpo_adjust_wspace) + xprt->xpt_ops->xpo_adjust_wspace(xprt); svc_xprt_enqueue(xprt); } } diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c index b507cd327d9b..c24a8ff33f8f 100644 --- a/net/sunrpc/svcsock.c +++ b/net/sunrpc/svcsock.c @@ -446,15 +446,43 @@ static void svc_write_space(struct sock *sk) } } +static int svc_tcp_has_wspace(struct svc_xprt *xprt) +{ + struct svc_sock *svsk = container_of(xprt, struct svc_sock, sk_xprt); + struct svc_serv *serv = svsk->sk_xprt.xpt_server; + int required; + + if (test_bit(XPT_LISTENER, &xprt->xpt_flags)) + return 1; + required = atomic_read(&xprt->xpt_reserved) + serv->sv_max_mesg; + if (sk_stream_wspace(svsk->sk_sk) >= required || + (sk_stream_min_wspace(svsk->sk_sk) == 0 && + atomic_read(&xprt->xpt_reserved) == 0)) + return 1; + set_bit(SOCK_NOSPACE, &svsk->sk_sock->flags); + return 0; +} + static void svc_tcp_write_space(struct sock *sk) { + struct svc_sock *svsk = (struct svc_sock *)(sk->sk_user_data); struct socket *sock = sk->sk_socket; - if (sk_stream_is_writeable(sk) && sock) + if (!sk_stream_is_writeable(sk) || !sock) + return; + if (!svsk || svc_tcp_has_wspace(&svsk->sk_xprt)) clear_bit(SOCK_NOSPACE, &sock->flags); svc_write_space(sk); } +static void svc_tcp_adjust_wspace(struct svc_xprt *xprt) +{ + struct svc_sock *svsk = container_of(xprt, struct svc_sock, sk_xprt); + + if (svc_tcp_has_wspace(xprt)) + clear_bit(SOCK_NOSPACE, &svsk->sk_sock->flags); +} + /* * See net/ipv6/ip_sockglue.c : ip_cmsg_recv_pktinfo */ @@ -692,6 +720,7 @@ static struct svc_xprt_class svc_udp_class = { .xcl_owner = THIS_MODULE, .xcl_ops = &svc_udp_ops, .xcl_max_payload = RPCSVC_MAXPAYLOAD_UDP, + .xcl_ident = XPRT_TRANSPORT_UDP, }; static void svc_udp_init(struct svc_sock *svsk, struct svc_serv *serv) @@ -1197,23 +1226,6 @@ static void svc_tcp_prep_reply_hdr(struct svc_rqst *rqstp) svc_putnl(resv, 0); } -static int svc_tcp_has_wspace(struct svc_xprt *xprt) -{ - struct svc_sock *svsk = container_of(xprt, struct svc_sock, sk_xprt); - struct svc_serv *serv = svsk->sk_xprt.xpt_server; - int required; - - if (test_bit(XPT_LISTENER, &xprt->xpt_flags)) - return 1; - required = atomic_read(&xprt->xpt_reserved) + serv->sv_max_mesg; - if (sk_stream_wspace(svsk->sk_sk) >= required || - (sk_stream_min_wspace(svsk->sk_sk) == 0 && - atomic_read(&xprt->xpt_reserved) == 0)) - return 1; - set_bit(SOCK_NOSPACE, &svsk->sk_sock->flags); - return 0; -} - static struct svc_xprt *svc_tcp_create(struct svc_serv *serv, struct net *net, struct sockaddr *sa, int salen, @@ -1285,6 +1297,7 @@ static struct svc_xprt_ops svc_tcp_ops = { .xpo_has_wspace = svc_tcp_has_wspace, .xpo_accept = svc_tcp_accept, .xpo_secure_port = svc_sock_secure_port, + .xpo_adjust_wspace = svc_tcp_adjust_wspace, }; static struct svc_xprt_class svc_tcp_class = { @@ -1292,6 +1305,7 @@ static struct svc_xprt_class svc_tcp_class = { .xcl_owner = THIS_MODULE, .xcl_ops = &svc_tcp_ops, .xcl_max_payload = RPCSVC_MAXPAYLOAD_TCP, + .xcl_ident = XPRT_TRANSPORT_TCP, }; void svc_init_xprt_sock(void) diff --git a/net/sunrpc/xdr.c b/net/sunrpc/xdr.c index 23fb4e75e245..290af97bf6f9 100644 --- a/net/sunrpc/xdr.c +++ b/net/sunrpc/xdr.c @@ -509,7 +509,8 @@ void xdr_commit_encode(struct xdr_stream *xdr) } EXPORT_SYMBOL_GPL(xdr_commit_encode); -__be32 *xdr_get_next_encode_buffer(struct xdr_stream *xdr, size_t nbytes) +static __be32 *xdr_get_next_encode_buffer(struct xdr_stream *xdr, + size_t nbytes) { static __be32 *p; int space_left; diff --git a/net/sunrpc/xprt.c b/net/sunrpc/xprt.c index c3b2b3369e52..51c63165073c 100644 --- a/net/sunrpc/xprt.c +++ b/net/sunrpc/xprt.c @@ -1306,7 +1306,7 @@ struct rpc_xprt *xprt_create_transport(struct xprt_create *args) } } spin_unlock(&xprt_list_lock); - printk(KERN_ERR "RPC: transport (%d) not supported\n", args->ident); + dprintk("RPC: transport (%d) not supported\n", args->ident); return ERR_PTR(-EIO); found: diff --git a/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c b/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c index 8f92a61ee2df..e0110270d650 100644 --- a/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c +++ b/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c @@ -43,6 +43,7 @@ #include <linux/sunrpc/debug.h> #include <linux/sunrpc/rpc_rdma.h> #include <linux/spinlock.h> +#include <linux/highmem.h> #include <asm/unaligned.h> #include <rdma/ib_verbs.h> #include <rdma/rdma_cm.h> @@ -435,6 +436,32 @@ static int rdma_read_chunks(struct svcxprt_rdma *xprt, return ret; } +/* + * To avoid a separate RDMA READ just for a handful of zero bytes, + * RFC 5666 section 3.7 allows the client to omit the XDR zero pad + * in chunk lists. + */ +static void +rdma_fix_xdr_pad(struct xdr_buf *buf) +{ + unsigned int page_len = buf->page_len; + unsigned int size = (XDR_QUADLEN(page_len) << 2) - page_len; + unsigned int offset, pg_no; + char *p; + + if (size == 0) + return; + + pg_no = page_len >> PAGE_SHIFT; + offset = page_len & ~PAGE_MASK; + p = page_address(buf->pages[pg_no]); + memset(p + offset, 0, size); + + buf->page_len += size; + buf->buflen += size; + buf->len += size; +} + static int rdma_read_complete(struct svc_rqst *rqstp, struct svc_rdma_op_ctxt *head) { @@ -449,6 +476,7 @@ static int rdma_read_complete(struct svc_rqst *rqstp, rqstp->rq_pages[page_no] = head->pages[page_no]; } /* Point rq_arg.pages past header */ + rdma_fix_xdr_pad(&head->arg); rqstp->rq_arg.pages = &rqstp->rq_pages[head->hdr_count]; rqstp->rq_arg.page_len = head->arg.page_len; rqstp->rq_arg.page_base = head->arg.page_base; diff --git a/net/sunrpc/xprtrdma/svc_rdma_sendto.c b/net/sunrpc/xprtrdma/svc_rdma_sendto.c index 49fd21a5c215..9f1b50689c0f 100644 --- a/net/sunrpc/xprtrdma/svc_rdma_sendto.c +++ b/net/sunrpc/xprtrdma/svc_rdma_sendto.c @@ -192,6 +192,8 @@ static int send_write(struct svcxprt_rdma *xprt, struct svc_rqst *rqstp, xdr_sge_no++; BUG_ON(xdr_sge_no > vec->count); bc -= sge_bytes; + if (sge_no == xprt->sc_max_sge) + break; } /* Prepare WRITE WR */ @@ -209,7 +211,7 @@ static int send_write(struct svcxprt_rdma *xprt, struct svc_rqst *rqstp, atomic_inc(&rdma_stat_write); if (svc_rdma_send(xprt, &write_wr)) goto err; - return 0; + return write_len - bc; err: svc_rdma_unmap_dma(ctxt); svc_rdma_put_context(ctxt, 0); @@ -225,7 +227,6 @@ static int send_write_chunks(struct svcxprt_rdma *xprt, { u32 xfer_len = rqstp->rq_res.page_len + rqstp->rq_res.tail[0].iov_len; int write_len; - int max_write; u32 xdr_off; int chunk_off; int chunk_no; @@ -239,8 +240,6 @@ static int send_write_chunks(struct svcxprt_rdma *xprt, res_ary = (struct rpcrdma_write_array *) &rdma_resp->rm_body.rm_chunks[1]; - max_write = xprt->sc_max_sge * PAGE_SIZE; - /* Write chunks start at the pagelist */ for (xdr_off = rqstp->rq_res.head[0].iov_len, chunk_no = 0; xfer_len && chunk_no < arg_ary->wc_nchunks; @@ -260,23 +259,21 @@ static int send_write_chunks(struct svcxprt_rdma *xprt, write_len); chunk_off = 0; while (write_len) { - int this_write; - this_write = min(write_len, max_write); ret = send_write(xprt, rqstp, ntohl(arg_ch->rs_handle), rs_offset + chunk_off, xdr_off, - this_write, + write_len, vec); - if (ret) { + if (ret <= 0) { dprintk("svcrdma: RDMA_WRITE failed, ret=%d\n", ret); return -EIO; } - chunk_off += this_write; - xdr_off += this_write; - xfer_len -= this_write; - write_len -= this_write; + chunk_off += ret; + xdr_off += ret; + xfer_len -= ret; + write_len -= ret; } } /* Update the req with the number of chunks actually used */ @@ -293,7 +290,6 @@ static int send_reply_chunks(struct svcxprt_rdma *xprt, { u32 xfer_len = rqstp->rq_res.len; int write_len; - int max_write; u32 xdr_off; int chunk_no; int chunk_off; @@ -311,8 +307,6 @@ static int send_reply_chunks(struct svcxprt_rdma *xprt, res_ary = (struct rpcrdma_write_array *) &rdma_resp->rm_body.rm_chunks[2]; - max_write = xprt->sc_max_sge * PAGE_SIZE; - /* xdr offset starts at RPC message */ nchunks = ntohl(arg_ary->wc_nchunks); for (xdr_off = 0, chunk_no = 0; @@ -330,24 +324,21 @@ static int send_reply_chunks(struct svcxprt_rdma *xprt, write_len); chunk_off = 0; while (write_len) { - int this_write; - - this_write = min(write_len, max_write); ret = send_write(xprt, rqstp, ntohl(ch->rs_handle), rs_offset + chunk_off, xdr_off, - this_write, + write_len, vec); - if (ret) { + if (ret <= 0) { dprintk("svcrdma: RDMA_WRITE failed, ret=%d\n", ret); return -EIO; } - chunk_off += this_write; - xdr_off += this_write; - xfer_len -= this_write; - write_len -= this_write; + chunk_off += ret; + xdr_off += ret; + xfer_len -= ret; + write_len -= ret; } } /* Update the req with the number of chunks actually used */ diff --git a/net/sunrpc/xprtrdma/svc_rdma_transport.c b/net/sunrpc/xprtrdma/svc_rdma_transport.c index e7323fbbd348..374feb44afea 100644 --- a/net/sunrpc/xprtrdma/svc_rdma_transport.c +++ b/net/sunrpc/xprtrdma/svc_rdma_transport.c @@ -92,6 +92,7 @@ struct svc_xprt_class svc_rdma_class = { .xcl_owner = THIS_MODULE, .xcl_ops = &svc_rdma_ops, .xcl_max_payload = RPCSVC_MAXPAYLOAD_TCP, + .xcl_ident = XPRT_TRANSPORT_RDMA, }; struct svc_rdma_op_ctxt *svc_rdma_get_context(struct svcxprt_rdma *xprt) @@ -942,23 +943,8 @@ static struct svc_xprt *svc_rdma_accept(struct svc_xprt *xprt) ret = rdma_create_qp(newxprt->sc_cm_id, newxprt->sc_pd, &qp_attr); if (ret) { - /* - * XXX: This is a hack. We need a xx_request_qp interface - * that will adjust the qp_attr's with a best-effort - * number - */ - qp_attr.cap.max_send_sge -= 2; - qp_attr.cap.max_recv_sge -= 2; - ret = rdma_create_qp(newxprt->sc_cm_id, newxprt->sc_pd, - &qp_attr); - if (ret) { - dprintk("svcrdma: failed to create QP, ret=%d\n", ret); - goto errout; - } - newxprt->sc_max_sge = qp_attr.cap.max_send_sge; - newxprt->sc_max_sge = qp_attr.cap.max_recv_sge; - newxprt->sc_sq_depth = qp_attr.cap.max_send_wr; - newxprt->sc_max_requests = qp_attr.cap.max_recv_wr; + dprintk("svcrdma: failed to create QP, ret=%d\n", ret); + goto errout; } newxprt->sc_qp = newxprt->sc_cm_id->qp; |