diff options
author | Scott Mayhew <smayhew@redhat.com> | 2019-12-10 07:31:14 -0500 |
---|---|---|
committer | Anna Schumaker <Anna.Schumaker@Netapp.com> | 2020-01-15 10:15:17 -0500 |
commit | 62a55d088cd87d480a6fd67b0d63b14ccae80838 (patch) | |
tree | 0ddc759236070f35409b58c8a30a01610978c6a1 /fs/nfs/fs_context.c | |
parent | f2aedb713c284429987dc66c7aaf38decfc8da2a (diff) | |
download | linux-62a55d088cd87d480a6fd67b0d63b14ccae80838.tar.bz2 |
NFS: Additional refactoring for fs_context conversion
Split out from commit "NFS: Add fs_context support."
This patch adds additional refactoring for the conversion of NFS to use
fs_context, namely:
(*) Merge nfs_mount_info and nfs_clone_mount into nfs_fs_context.
nfs_clone_mount has had several fields removed, and nfs_mount_info
has been removed altogether.
(*) Various functions now take an fs_context as an argument instead
of nfs_mount_info, nfs_fs_context, etc.
Signed-off-by: Scott Mayhew <smayhew@redhat.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Diffstat (limited to 'fs/nfs/fs_context.c')
-rw-r--r-- | fs/nfs/fs_context.c | 155 |
1 files changed, 56 insertions, 99 deletions
diff --git a/fs/nfs/fs_context.c b/fs/nfs/fs_context.c index ac1a8d7d7393..e472334b978d 100644 --- a/fs/nfs/fs_context.c +++ b/fs/nfs/fs_context.c @@ -241,43 +241,6 @@ static const struct constant_table nfs_secflavor_tokens[] = { { "sys", Opt_sec_sys }, }; -struct nfs_fs_context *nfs_alloc_parsed_mount_data(void) -{ - struct nfs_fs_context *ctx; - - ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); - if (ctx) { - ctx->timeo = NFS_UNSPEC_TIMEO; - ctx->retrans = NFS_UNSPEC_RETRANS; - ctx->acregmin = NFS_DEF_ACREGMIN; - ctx->acregmax = NFS_DEF_ACREGMAX; - ctx->acdirmin = NFS_DEF_ACDIRMIN; - ctx->acdirmax = NFS_DEF_ACDIRMAX; - ctx->mount_server.port = NFS_UNSPEC_PORT; - ctx->nfs_server.port = NFS_UNSPEC_PORT; - ctx->nfs_server.protocol = XPRT_TRANSPORT_TCP; - ctx->selected_flavor = RPC_AUTH_MAXFLAVOR; - ctx->minorversion = 0; - ctx->need_mount = true; - ctx->net = current->nsproxy->net_ns; - ctx->lsm_opts = NULL; - } - return ctx; -} - -void nfs_free_parsed_mount_data(struct nfs_fs_context *ctx) -{ - if (ctx) { - kfree(ctx->client_address); - kfree(ctx->mount_server.hostname); - kfree(ctx->nfs_server.export_path); - kfree(ctx->nfs_server.hostname); - kfree(ctx->fscache_uniq); - security_free_mnt_opts(&ctx->lsm_opts); - kfree(ctx); - } -} - /* * Sanity-check a server address provided by the mount command. * @@ -342,7 +305,7 @@ static void nfs_set_mount_transport_protocol(struct nfs_fs_context *ctx) * Add 'flavor' to 'auth_info' if not already present. * Returns true if 'flavor' ends up in the list, false otherwise */ -static int nfs_auth_info_add(struct nfs_fs_context *ctx, +static int nfs_auth_info_add(struct fs_context *fc, struct nfs_auth_info *auth_info, rpc_authflavor_t flavor) { @@ -367,9 +330,10 @@ static int nfs_auth_info_add(struct nfs_fs_context *ctx, /* * Parse the value of the 'sec=' option. */ -static int nfs_parse_security_flavors(struct nfs_fs_context *ctx, +static int nfs_parse_security_flavors(struct fs_context *fc, struct fs_parameter *param) { + struct nfs_fs_context *ctx = nfs_fc2context(fc); rpc_authflavor_t pseudoflavor; char *string = param->string, *p; int ret; @@ -419,7 +383,7 @@ static int nfs_parse_security_flavors(struct nfs_fs_context *ctx, return -EINVAL; } - ret = nfs_auth_info_add(ctx, &ctx->auth_info, pseudoflavor); + ret = nfs_auth_info_add(fc, &ctx->auth_info, pseudoflavor); if (ret < 0) return ret; } @@ -427,9 +391,11 @@ static int nfs_parse_security_flavors(struct nfs_fs_context *ctx, return 0; } -static int nfs_parse_version_string(struct nfs_fs_context *ctx, +static int nfs_parse_version_string(struct fs_context *fc, const char *string) { + struct nfs_fs_context *ctx = nfs_fc2context(fc); + ctx->flags &= ~NFS_MOUNT_VER3; switch (lookup_constant(nfs_vers_tokens, string, -1)) { case Opt_vers_2: @@ -656,17 +622,17 @@ static int nfs_fs_context_parse_param(struct fs_context *fc, * options that take text values */ case Opt_v: - ret = nfs_parse_version_string(ctx, param->key + 1); + ret = nfs_parse_version_string(fc, param->key + 1); if (ret < 0) return ret; break; case Opt_vers: - ret = nfs_parse_version_string(ctx, param->string); + ret = nfs_parse_version_string(fc, param->string); if (ret < 0) return ret; break; case Opt_sec: - ret = nfs_parse_security_flavors(ctx, param); + ret = nfs_parse_security_flavors(fc, param); if (ret < 0) return ret; break; @@ -729,7 +695,7 @@ static int nfs_fs_context_parse_param(struct fs_context *fc, break; case Opt_addr: - len = rpc_pton(ctx->net, param->string, param->size, + len = rpc_pton(fc->net_ns, param->string, param->size, &ctx->nfs_server.address, sizeof(ctx->nfs_server._address)); if (len == 0) @@ -747,7 +713,7 @@ static int nfs_fs_context_parse_param(struct fs_context *fc, param->string = NULL; break; case Opt_mountaddr: - len = rpc_pton(ctx->net, param->string, param->size, + len = rpc_pton(fc->net_ns, param->string, param->size, &ctx->mount_server.address, sizeof(ctx->mount_server._address)); if (len == 0) @@ -819,7 +785,7 @@ out_of_bounds: } /* - * Split "dev_name" into "hostname:export_path". + * Split fc->source into "hostname:export_path". * * The leftmost colon demarks the split between the server's hostname * and the export path. If the hostname starts with a left square @@ -827,12 +793,13 @@ out_of_bounds: * * Note: caller frees hostname and export path, even on error. */ -static int nfs_parse_devname(struct nfs_fs_context *ctx, - const char *dev_name, - size_t maxnamlen, size_t maxpathlen) +static int nfs_parse_source(struct fs_context *fc, + size_t maxnamlen, size_t maxpathlen) { + struct nfs_fs_context *ctx = nfs_fc2context(fc); + const char *dev_name = fc->source; size_t len; - char *end; + const char *end; if (unlikely(!dev_name || !*dev_name)) { dfprintk(MOUNT, "NFS: device name not specified\n"); @@ -848,7 +815,7 @@ static int nfs_parse_devname(struct nfs_fs_context *ctx, len = end - dev_name; end++; } else { - char *comma; + const char *comma; end = strchr(dev_name, ':'); if (end == NULL) @@ -856,8 +823,8 @@ static int nfs_parse_devname(struct nfs_fs_context *ctx, len = end - dev_name; /* kill possible hostname list: not supported */ - comma = strchr(dev_name, ','); - if (comma != NULL && comma < end) + comma = memchr(dev_name, ',', len); + if (comma) len = comma - dev_name; } @@ -920,7 +887,7 @@ static int nfs23_parse_monolithic(struct fs_context *fc, struct nfs_mount_data *data) { struct nfs_fs_context *ctx = nfs_fc2context(fc); - struct nfs_fh *mntfh = ctx->mount_info.mntfh; + struct nfs_fh *mntfh = ctx->mntfh; struct sockaddr *sap = (struct sockaddr *)&ctx->nfs_server.address; int extra_flags = NFS_MOUNT_LEGACY_INTERFACE; @@ -1009,6 +976,7 @@ static int nfs23_parse_monolithic(struct fs_context *fc, else ctx->flags |= (NFS_MOUNT_LOCAL_FLOCK| NFS_MOUNT_LOCAL_FCNTL); + /* * The legacy version 6 binary mount data from userspace has a * field used only to transport selinux information into the @@ -1073,12 +1041,6 @@ out_invalid_fh: } #if IS_ENABLED(CONFIG_NFS_V4) -static void nfs4_validate_mount_flags(struct nfs_fs_context *ctx) -{ - ctx->flags &= ~(NFS_MOUNT_NONLM|NFS_MOUNT_NOACL|NFS_MOUNT_VER3| - NFS_MOUNT_LOCAL_FLOCK|NFS_MOUNT_LOCAL_FCNTL); -} - /* * Validate NFSv4 mount options */ @@ -1251,20 +1213,22 @@ static int nfs_fs_context_validate(struct fs_context *fc) goto out_no_address; if (ctx->version == 4) { -#if IS_ENABLED(CONFIG_NFS_V4) - if (ctx->nfs_server.protocol == XPRT_TRANSPORT_RDMA) - port = NFS_RDMA_PORT; - else - port = NFS_PORT; - max_namelen = NFS4_MAXNAMLEN; - max_pathlen = NFS4_MAXPATHLEN; - nfs_validate_transport_protocol(ctx); - if (ctx->nfs_server.protocol == XPRT_TRANSPORT_UDP) - goto out_invalid_transport_udp; - nfs4_validate_mount_flags(ctx); -#else - goto out_v4_not_compiled; -#endif /* CONFIG_NFS_V4 */ + if (IS_ENABLED(CONFIG_NFS_V4)) { + if (ctx->nfs_server.protocol == XPRT_TRANSPORT_RDMA) + port = NFS_RDMA_PORT; + else + port = NFS_PORT; + max_namelen = NFS4_MAXNAMLEN; + max_pathlen = NFS4_MAXPATHLEN; + nfs_validate_transport_protocol(ctx); + if (ctx->nfs_server.protocol == XPRT_TRANSPORT_UDP) + goto out_invalid_transport_udp; + ctx->flags &= ~(NFS_MOUNT_NONLM | NFS_MOUNT_NOACL | + NFS_MOUNT_VER3 | NFS_MOUNT_LOCAL_FLOCK | + NFS_MOUNT_LOCAL_FCNTL); + } else { + goto out_v4_not_compiled; + } } else { nfs_set_mount_transport_protocol(ctx); if (ctx->nfs_server.protocol == XPRT_TRANSPORT_RDMA) @@ -1273,33 +1237,30 @@ static int nfs_fs_context_validate(struct fs_context *fc) nfs_set_port(sap, &ctx->nfs_server.port, port); - ret = nfs_parse_devname(ctx, fc->source, max_namelen, max_pathlen); + ret = nfs_parse_source(fc, max_namelen, max_pathlen); if (ret < 0) return ret; /* Load the NFS protocol module if we haven't done so yet */ - if (!ctx->mount_info.nfs_mod) { + if (!ctx->nfs_mod) { nfs_mod = get_nfs_version(ctx->version); if (IS_ERR(nfs_mod)) { ret = PTR_ERR(nfs_mod); goto out_version_unavailable; } - ctx->mount_info.nfs_mod = nfs_mod; + ctx->nfs_mod = nfs_mod; } return 0; out_no_device_name: dfprintk(MOUNT, "NFS: Device name not specified\n"); return -EINVAL; -#if !IS_ENABLED(CONFIG_NFS_V4) out_v4_not_compiled: dfprintk(MOUNT, "NFS: NFSv4 is not compiled into kernel\n"); return -EPROTONOSUPPORT; -#else out_invalid_transport_udp: dfprintk(MOUNT, "NFSv4: Unsupported transport protocol udp\n"); return -EINVAL; -#endif /* !CONFIG_NFS_V4 */ out_no_address: dfprintk(MOUNT, "NFS: mount program didn't pass remote address\n"); return -EINVAL; @@ -1332,7 +1293,7 @@ static int nfs_get_tree(struct fs_context *fc) if (err) return err; if (!ctx->internal) - return ctx->mount_info.nfs_mod->rpc_ops->try_get_tree(fc); + return ctx->nfs_mod->rpc_ops->try_get_tree(fc); else return nfs_get_tree_common(fc); } @@ -1351,20 +1312,19 @@ static int nfs_fs_context_dup(struct fs_context *fc, struct fs_context *src_fc) if (!ctx) return -ENOMEM; - ctx->mount_info.mntfh = nfs_alloc_fhandle(); - if (!ctx->mount_info.mntfh) { + ctx->mntfh = nfs_alloc_fhandle(); + if (!ctx->mntfh) { kfree(ctx); return -ENOMEM; } - nfs_copy_fh(ctx->mount_info.mntfh, src->mount_info.mntfh); + nfs_copy_fh(ctx->mntfh, src->mntfh); - __module_get(ctx->mount_info.nfs_mod->owner); + __module_get(ctx->nfs_mod->owner); ctx->client_address = NULL; ctx->mount_server.hostname = NULL; ctx->nfs_server.export_path = NULL; ctx->nfs_server.hostname = NULL; ctx->fscache_uniq = NULL; - ctx->clone_data.addr = NULL; ctx->clone_data.fattr = NULL; fc->fs_private = ctx; return 0; @@ -1375,17 +1335,16 @@ static void nfs_fs_context_free(struct fs_context *fc) struct nfs_fs_context *ctx = nfs_fc2context(fc); if (ctx) { - if (ctx->mount_info.server) - nfs_free_server(ctx->mount_info.server); - if (ctx->mount_info.nfs_mod) - put_nfs_version(ctx->mount_info.nfs_mod); + if (ctx->server) + nfs_free_server(ctx->server); + if (ctx->nfs_mod) + put_nfs_version(ctx->nfs_mod); kfree(ctx->client_address); kfree(ctx->mount_server.hostname); kfree(ctx->nfs_server.export_path); kfree(ctx->nfs_server.hostname); kfree(ctx->fscache_uniq); - nfs_free_fhandle(ctx->mount_info.mntfh); - kfree(ctx->clone_data.addr); + nfs_free_fhandle(ctx->mntfh); nfs_free_fattr(ctx->clone_data.fattr); kfree(ctx); } @@ -1413,9 +1372,8 @@ static int nfs_init_fs_context(struct fs_context *fc) if (unlikely(!ctx)) return -ENOMEM; - ctx->mount_info.ctx = ctx; - ctx->mount_info.mntfh = nfs_alloc_fhandle(); - if (unlikely(!ctx->mount_info.mntfh)) { + ctx->mntfh = nfs_alloc_fhandle(); + if (unlikely(!ctx->mntfh)) { kfree(ctx); return -ENOMEM; } @@ -1452,8 +1410,8 @@ static int nfs_init_fs_context(struct fs_context *fc) fc->net_ns = get_net(net); } - ctx->mount_info.nfs_mod = nfss->nfs_client->cl_nfs_mod; - __module_get(ctx->mount_info.nfs_mod->owner); + ctx->nfs_mod = nfss->nfs_client->cl_nfs_mod; + __module_get(ctx->nfs_mod->owner); } else { /* defaults */ ctx->timeo = NFS_UNSPEC_TIMEO; @@ -1468,7 +1426,6 @@ static int nfs_init_fs_context(struct fs_context *fc) ctx->minorversion = 0; ctx->need_mount = true; } - ctx->net = fc->net_ns; fc->fs_private = ctx; fc->ops = &nfs_fs_context_ops; return 0; |