diff options
author | NeilBrown <neilb@cse.unsw.edu.au> | 2005-06-23 22:04:30 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-06-24 00:06:36 -0700 |
commit | c7b9a45927e74c81d6562153f7fde9d32da00159 (patch) | |
tree | d21fb5d43052bce7469c168d1ad485c821a42079 /fs/nfsd | |
parent | 190e4fbf96037e5e526ba3210f2bcc2a3b6fe964 (diff) | |
download | linux-c7b9a45927e74c81d6562153f7fde9d32da00159.tar.bz2 |
[PATCH] knfsd: nfsd4: reboot recovery
This patch adds the code to create and remove client subdirectories from the
recovery directory, as described in the previous patch comment.
Signed-off-by: Andy Adamson <andros@citi.umich.edu>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Signed-off-by: Neil Brown <neilb@cse.unsw.edu.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'fs/nfsd')
-rw-r--r-- | fs/nfsd/nfs4recover.c | 169 | ||||
-rw-r--r-- | fs/nfsd/nfs4state.c | 16 |
2 files changed, 185 insertions, 0 deletions
diff --git a/fs/nfsd/nfs4recover.c b/fs/nfsd/nfs4recover.c index 2dc9851a1d37..2805c5245eac 100644 --- a/fs/nfsd/nfs4recover.c +++ b/fs/nfsd/nfs4recover.c @@ -120,6 +120,70 @@ out: return status; } +static int +nfsd4_rec_fsync(struct dentry *dentry) +{ + struct file *filp; + int status = nfs_ok; + + dprintk("NFSD: nfs4_fsync_rec_dir\n"); + filp = dentry_open(dget(dentry), mntget(rec_dir.mnt), O_RDWR); + if (IS_ERR(filp)) { + status = PTR_ERR(filp); + goto out; + } + if (filp->f_op && filp->f_op->fsync) + status = filp->f_op->fsync(filp, filp->f_dentry, 0); + fput(filp); +out: + if (status) + printk("nfsd4: unable to sync recovery directory\n"); + return status; +} + +int +nfsd4_create_clid_dir(struct nfs4_client *clp) +{ + char *dname = clp->cl_recdir; + struct dentry *dentry; + uid_t uid; + gid_t gid; + int status; + + dprintk("NFSD: nfsd4_create_clid_dir for \"%s\"\n", dname); + + if (!rec_dir_init || clp->cl_firststate) + return 0; + + nfs4_save_user(&uid, &gid); + + /* lock the parent */ + down(&rec_dir.dentry->d_inode->i_sem); + + dentry = lookup_one_len(dname, rec_dir.dentry, HEXDIR_LEN-1); + if (IS_ERR(dentry)) { + status = PTR_ERR(dentry); + goto out_unlock; + } + status = -EEXIST; + if (dentry->d_inode) { + dprintk("NFSD: nfsd4_create_clid_dir: DIRECTORY EXISTS\n"); + goto out_put; + } + status = vfs_mkdir(rec_dir.dentry->d_inode, dentry, S_IRWXU); +out_put: + dput(dentry); +out_unlock: + up(&rec_dir.dentry->d_inode->i_sem); + if (status == 0) { + clp->cl_firststate = 1; + status = nfsd4_rec_fsync(rec_dir.dentry); + } + nfs4_reset_user(uid, gid); + dprintk("NFSD: nfsd4_create_clid_dir returns %d\n", status); + return status; +} + typedef int (recdir_func)(struct dentry *, struct dentry *); struct dentry_list { @@ -202,6 +266,111 @@ out: } static int +nfsd4_remove_clid_file(struct dentry *dir, struct dentry *dentry) +{ + int status; + + if (!S_ISREG(dir->d_inode->i_mode)) { + printk("nfsd4: non-file found in client recovery directory\n"); + return -EINVAL; + } + down(&dir->d_inode->i_sem); + status = vfs_unlink(dir->d_inode, dentry); + up(&dir->d_inode->i_sem); + return status; +} + +static int +nfsd4_clear_clid_dir(struct dentry *dir, struct dentry *dentry) +{ + int status; + + /* For now this directory should already be empty, but we empty it of + * any regular files anyway, just in case the directory was created by + * a kernel from the future.... */ + nfsd4_list_rec_dir(dentry, nfsd4_remove_clid_file); + down(&dir->d_inode->i_sem); + status = vfs_rmdir(dir->d_inode, dentry); + up(&dir->d_inode->i_sem); + return status; +} + +static int +nfsd4_unlink_clid_dir(char *name, int namlen) +{ + struct dentry *dentry; + int status; + + dprintk("NFSD: nfsd4_unlink_clid_dir. name %.*s\n", namlen, name); + + dentry = lookup_one_len(name, rec_dir.dentry, namlen); + if (IS_ERR(dentry)) { + status = PTR_ERR(dentry); + return status; + } + status = -ENOENT; + if (!dentry->d_inode) + goto out; + + status = nfsd4_clear_clid_dir(rec_dir.dentry, dentry); +out: + dput(dentry); + return status; +} + +void +nfsd4_remove_clid_dir(struct nfs4_client *clp) +{ + uid_t uid; + gid_t gid; + int status; + + if (!rec_dir_init || !clp->cl_firststate) + return; + + nfs4_save_user(&uid, &gid); + status = nfsd4_unlink_clid_dir(clp->cl_recdir, HEXDIR_LEN-1); + nfs4_reset_user(uid, gid); + if (status == 0) + status = nfsd4_rec_fsync(rec_dir.dentry); + if (status) + printk("NFSD: Failed to remove expired client state directory" + " %.*s\n", HEXDIR_LEN, clp->cl_recdir); + return; +} + +static int +purge_old(struct dentry *parent, struct dentry *child) +{ + int status; + + if (nfs4_has_reclaimed_state(child->d_name.name)) + return nfs_ok; + + status = nfsd4_clear_clid_dir(parent, child); + if (status) + printk("failed to remove client recovery directory %s\n", + child->d_name.name); + /* Keep trying, success or failure: */ + return nfs_ok; +} + +void +nfsd4_recdir_purge_old(void) { + int status; + + if (!rec_dir_init) + return; + status = nfsd4_list_rec_dir(rec_dir.dentry, purge_old); + if (status == 0) + status = nfsd4_rec_fsync(rec_dir.dentry); + if (status) + printk("nfsd4: failed to purge old clients from recovery" + " directory %s\n", rec_dir.dentry->d_name.name); + return; +} + +static int load_recdir(struct dentry *parent, struct dentry *child) { if (child->d_name.len != HEXDIR_LEN - 1) { diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 6b9d23c39afe..6cca358cd650 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -905,6 +905,7 @@ nfsd4_setclientid_confirm(struct svc_rqst *rqstp, struct nfsd4_setclientid_confi conf = find_confirmed_client_by_str(unconf->cl_recdir, hash); if (conf) { + nfsd4_remove_clid_dir(conf); expire_client(conf); } move_to_confirmed(unconf); @@ -1691,6 +1692,7 @@ nfs4_set_claim_prev(struct nfsd4_open *open, int *status) *status = nfserr_reclaim_bad; else { open->op_stateowner->so_confirmed = 1; + open->op_stateowner->so_client->cl_firststate = 1; open->op_stateowner->so_seqid--; } } @@ -1903,6 +1905,7 @@ static void end_grace(void) { dprintk("NFSD: end of grace period\n"); + nfsd4_recdir_purge_old(); in_grace = 0; } @@ -1932,6 +1935,7 @@ nfs4_laundromat(void) } dprintk("NFSD: purging unused client (clientid %08x)\n", clp->cl_clientid.cl_id); + nfsd4_remove_clid_dir(clp); expire_client(clp); } INIT_LIST_HEAD(&reaplist); @@ -2320,6 +2324,8 @@ nfsd4_open_confirm(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfs stp->st_stateid.si_stateownerid, stp->st_stateid.si_fileid, stp->st_stateid.si_generation); + + nfsd4_create_clid_dir(sop->so_client); out: if (oc->oc_stateowner) nfs4_get_stateowner(oc->oc_stateowner); @@ -3089,6 +3095,16 @@ alloc_reclaim(void) return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); } +int +nfs4_has_reclaimed_state(const char *name) +{ + unsigned int strhashval = clientstr_hashval(name); + struct nfs4_client *clp; + + clp = find_confirmed_client_by_str(name, strhashval); + return clp ? 1 : 0; +} + /* * failure => all reset bets are off, nfserr_no_grace... */ |