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-rw-r--r--fs/nfs/super.c172
1 files changed, 120 insertions, 52 deletions
diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index 95866a8c21bb..ac6a3c55dce4 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -64,11 +64,12 @@
#include "internal.h"
#include "fscache.h"
#include "pnfs.h"
+#include "nfs.h"
#define NFSDBG_FACILITY NFSDBG_VFS
#define NFS_TEXT_DATA 1
-#ifdef CONFIG_NFS_V3
+#if IS_ENABLED(CONFIG_NFS_V3)
#define NFS_DEFAULT_VERSION 3
#else
#define NFS_DEFAULT_VERSION 2
@@ -281,13 +282,14 @@ static match_table_t nfs_vers_tokens = {
static struct dentry *nfs_xdev_mount(struct file_system_type *fs_type,
int flags, const char *dev_name, void *raw_data);
-static struct file_system_type nfs_fs_type = {
+struct file_system_type nfs_fs_type = {
.owner = THIS_MODULE,
.name = "nfs",
.mount = nfs_fs_mount,
.kill_sb = nfs_kill_super,
.fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
};
+EXPORT_SYMBOL_GPL(nfs_fs_type);
struct file_system_type nfs_xdev_fs_type = {
.owner = THIS_MODULE,
@@ -297,7 +299,7 @@ struct file_system_type nfs_xdev_fs_type = {
.fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
};
-static const struct super_operations nfs_sops = {
+const struct super_operations nfs_sops = {
.alloc_inode = nfs_alloc_inode,
.destroy_inode = nfs_destroy_inode,
.write_inode = nfs_write_inode,
@@ -311,8 +313,9 @@ static const struct super_operations nfs_sops = {
.show_stats = nfs_show_stats,
.remount_fs = nfs_remount,
};
+EXPORT_SYMBOL_GPL(nfs_sops);
-#ifdef CONFIG_NFS_V4
+#if IS_ENABLED(CONFIG_NFS_V4)
static void nfs4_validate_mount_flags(struct nfs_parsed_mount_data *);
static int nfs4_validate_mount_data(void *options,
struct nfs_parsed_mount_data *args, const char *dev_name);
@@ -363,6 +366,7 @@ void nfs_sb_active(struct super_block *sb)
if (atomic_inc_return(&server->active) == 1)
atomic_inc(&sb->s_active);
}
+EXPORT_SYMBOL_GPL(nfs_sb_active);
void nfs_sb_deactive(struct super_block *sb)
{
@@ -371,6 +375,7 @@ void nfs_sb_deactive(struct super_block *sb)
if (atomic_dec_and_test(&server->active))
deactivate_super(sb);
}
+EXPORT_SYMBOL_GPL(nfs_sb_deactive);
/*
* Deliver file system statistics to userspace
@@ -436,6 +441,7 @@ int nfs_statfs(struct dentry *dentry, struct kstatfs *buf)
dprintk("%s: statfs error = %d\n", __func__, -error);
return error;
}
+EXPORT_SYMBOL_GPL(nfs_statfs);
/*
* Map the security flavour number to a name
@@ -541,7 +547,7 @@ static void nfs_show_mountd_options(struct seq_file *m, struct nfs_server *nfss,
nfs_show_mountd_netid(m, nfss, showdefaults);
}
-#ifdef CONFIG_NFS_V4
+#if IS_ENABLED(CONFIG_NFS_V4)
static void nfs_show_nfsv4_options(struct seq_file *m, struct nfs_server *nfss,
int showdefaults)
{
@@ -672,8 +678,9 @@ int nfs_show_options(struct seq_file *m, struct dentry *root)
return 0;
}
+EXPORT_SYMBOL_GPL(nfs_show_options);
-#ifdef CONFIG_NFS_V4
+#if IS_ENABLED(CONFIG_NFS_V4)
#ifdef CONFIG_NFS_V4_1
static void show_sessions(struct seq_file *m, struct nfs_server *server)
{
@@ -706,7 +713,7 @@ static void show_implementation_id(struct seq_file *m, struct nfs_server *nfss)
}
}
#else
-#ifdef CONFIG_NFS_V4
+#if IS_ENABLED(CONFIG_NFS_V4)
static void show_pnfs(struct seq_file *m, struct nfs_server *server)
{
}
@@ -731,12 +738,14 @@ int nfs_show_devname(struct seq_file *m, struct dentry *root)
free_page((unsigned long)page);
return err;
}
+EXPORT_SYMBOL_GPL(nfs_show_devname);
int nfs_show_path(struct seq_file *m, struct dentry *dentry)
{
seq_puts(m, "/");
return 0;
}
+EXPORT_SYMBOL_GPL(nfs_show_path);
/*
* Present statistical information for this VFS mountpoint
@@ -771,7 +780,7 @@ int nfs_show_stats(struct seq_file *m, struct dentry *root)
seq_printf(m, ",bsize=%u", nfss->bsize);
seq_printf(m, ",namlen=%u", nfss->namelen);
-#ifdef CONFIG_NFS_V4
+#if IS_ENABLED(CONFIG_NFS_V4)
if (nfss->nfs_client->rpc_ops->version == 4) {
seq_printf(m, "\n\tnfsv4:\t");
seq_printf(m, "bm0=0x%x", nfss->attr_bitmask[0]);
@@ -829,6 +838,7 @@ int nfs_show_stats(struct seq_file *m, struct dentry *root)
return 0;
}
+EXPORT_SYMBOL_GPL(nfs_show_stats);
/*
* Begin unmount by attempting to remove all automounted mountpoints we added
@@ -848,6 +858,7 @@ void nfs_umount_begin(struct super_block *sb)
if (!IS_ERR(rpc))
rpc_killall_tasks(rpc);
}
+EXPORT_SYMBOL_GPL(nfs_umount_begin);
static struct nfs_parsed_mount_data *nfs_alloc_parsed_mount_data(void)
{
@@ -1649,8 +1660,9 @@ static int nfs_request_mount(struct nfs_parsed_mount_data *args,
return nfs_walk_authlist(args, &request);
}
-static struct dentry *nfs_try_mount(int flags, const char *dev_name,
- struct nfs_mount_info *mount_info)
+struct dentry *nfs_try_mount(int flags, const char *dev_name,
+ struct nfs_mount_info *mount_info,
+ struct nfs_subversion *nfs_mod)
{
int status;
struct nfs_server *server;
@@ -1662,12 +1674,13 @@ static struct dentry *nfs_try_mount(int flags, const char *dev_name,
}
/* Get a volume representation */
- server = nfs_create_server(mount_info->parsed, mount_info->mntfh);
+ server = nfs_mod->rpc_ops->create_server(mount_info, nfs_mod);
if (IS_ERR(server))
return ERR_CAST(server);
- return nfs_fs_mount_common(&nfs_fs_type, server, flags, dev_name, mount_info);
+ return nfs_fs_mount_common(server, flags, dev_name, mount_info, nfs_mod);
}
+EXPORT_SYMBOL_GPL(nfs_try_mount);
/*
* Split "dev_name" into "hostname:export_path".
@@ -1871,7 +1884,7 @@ static int nfs23_validate_mount_data(void *options,
return NFS_TEXT_DATA;
}
-#ifndef CONFIG_NFS_V3
+#if !IS_ENABLED(CONFIG_NFS_V3)
if (args->version == 3)
goto out_v3_not_compiled;
#endif /* !CONFIG_NFS_V3 */
@@ -1891,7 +1904,7 @@ out_no_sec:
dfprintk(MOUNT, "NFS: nfs_mount_data version supports only AUTH_SYS\n");
return -EINVAL;
-#ifndef CONFIG_NFS_V3
+#if !IS_ENABLED(CONFIG_NFS_V3)
out_v3_not_compiled:
dfprintk(MOUNT, "NFS: NFSv3 is not compiled into kernel\n");
return -EPROTONOSUPPORT;
@@ -1910,7 +1923,7 @@ out_invalid_fh:
return -EINVAL;
}
-#ifdef CONFIG_NFS_V4
+#if IS_ENABLED(CONFIG_NFS_V4)
static int nfs_validate_mount_data(struct file_system_type *fs_type,
void *options,
struct nfs_parsed_mount_data *args,
@@ -1948,7 +1961,7 @@ static int nfs_validate_text_mount_data(void *options,
goto out_no_address;
if (args->version == 4) {
-#ifdef CONFIG_NFS_V4
+#if IS_ENABLED(CONFIG_NFS_V4)
port = NFS_PORT;
max_namelen = NFS4_MAXNAMLEN;
max_pathlen = NFS4_MAXPATHLEN;
@@ -1971,7 +1984,7 @@ static int nfs_validate_text_mount_data(void *options,
&args->nfs_server.export_path,
max_pathlen);
-#ifndef CONFIG_NFS_V4
+#if !IS_ENABLED(CONFIG_NFS_V4)
out_v4_not_compiled:
dfprintk(MOUNT, "NFS: NFSv4 is not compiled into kernel\n");
return -EPROTONOSUPPORT;
@@ -2070,6 +2083,7 @@ out:
kfree(data);
return error;
}
+EXPORT_SYMBOL_GPL(nfs_remount);
/*
* Initialise the common bits of the superblock
@@ -2103,10 +2117,12 @@ void nfs_fill_super(struct super_block *sb, struct nfs_mount_info *mount_info)
sb->s_blocksize_bits = 0;
sb->s_blocksize = 0;
- if (data->bsize)
+ sb->s_xattr = server->nfs_client->cl_nfs_mod->xattr;
+ sb->s_op = server->nfs_client->cl_nfs_mod->sops;
+ if (data && data->bsize)
sb->s_blocksize = nfs_block_size(data->bsize, &sb->s_blocksize_bits);
- if (server->nfs_client->rpc_ops->version == 3) {
+ if (server->nfs_client->rpc_ops->version != 2) {
/* The VFS shouldn't apply the umask to mode bits. We will do
* so ourselves when necessary.
*/
@@ -2114,9 +2130,9 @@ void nfs_fill_super(struct super_block *sb, struct nfs_mount_info *mount_info)
sb->s_time_gran = 1;
}
- sb->s_op = &nfs_sops;
nfs_initialise_sb(sb);
}
+EXPORT_SYMBOL_GPL(nfs_fill_super);
/*
* Finish setting up a cloned NFS2/3/4 superblock
@@ -2286,6 +2302,7 @@ int nfs_set_sb_security(struct super_block *s, struct dentry *mntroot,
{
return security_sb_set_mnt_opts(s, &mount_info->parsed->lsm_opts);
}
+EXPORT_SYMBOL_GPL(nfs_set_sb_security);
int nfs_clone_sb_security(struct super_block *s, struct dentry *mntroot,
struct nfs_mount_info *mount_info)
@@ -2296,11 +2313,12 @@ int nfs_clone_sb_security(struct super_block *s, struct dentry *mntroot,
return -ESTALE;
return 0;
}
+EXPORT_SYMBOL_GPL(nfs_clone_sb_security);
-struct dentry *nfs_fs_mount_common(struct file_system_type *fs_type,
- struct nfs_server *server,
+struct dentry *nfs_fs_mount_common(struct nfs_server *server,
int flags, const char *dev_name,
- struct nfs_mount_info *mount_info)
+ struct nfs_mount_info *mount_info,
+ struct nfs_subversion *nfs_mod)
{
struct super_block *s;
struct dentry *mntroot = ERR_PTR(-ENOMEM);
@@ -2319,7 +2337,7 @@ struct dentry *nfs_fs_mount_common(struct file_system_type *fs_type,
sb_mntdata.mntflags |= MS_SYNCHRONOUS;
/* Get a superblock - note that we may end up sharing one that already exists */
- s = sget(fs_type, compare_super, nfs_set_super, flags, &sb_mntdata);
+ s = sget(nfs_mod->nfs_fs, compare_super, nfs_set_super, flags, &sb_mntdata);
if (IS_ERR(s)) {
mntroot = ERR_CAST(s);
goto out_err_nosb;
@@ -2369,6 +2387,7 @@ error_splat_bdi:
deactivate_locked_super(s);
goto out;
}
+EXPORT_SYMBOL_GPL(nfs_fs_mount_common);
struct dentry *nfs_fs_mount(struct file_system_type *fs_type,
int flags, const char *dev_name, void *raw_data)
@@ -2378,6 +2397,7 @@ struct dentry *nfs_fs_mount(struct file_system_type *fs_type,
.set_security = nfs_set_sb_security,
};
struct dentry *mntroot = ERR_PTR(-ENOMEM);
+ struct nfs_subversion *nfs_mod;
int error;
mount_info.parsed = nfs_alloc_parsed_mount_data();
@@ -2394,18 +2414,21 @@ struct dentry *nfs_fs_mount(struct file_system_type *fs_type,
goto out;
}
-#ifdef CONFIG_NFS_V4
- if (mount_info.parsed->version == 4)
- mntroot = nfs4_try_mount(flags, dev_name, &mount_info);
- else
-#endif /* CONFIG_NFS_V4 */
- mntroot = nfs_try_mount(flags, dev_name, &mount_info);
+ nfs_mod = get_nfs_version(mount_info.parsed->version);
+ if (IS_ERR(nfs_mod)) {
+ mntroot = ERR_CAST(nfs_mod);
+ goto out;
+ }
+ mntroot = nfs_mod->rpc_ops->try_mount(flags, dev_name, &mount_info, nfs_mod);
+
+ put_nfs_version(nfs_mod);
out:
nfs_free_parsed_mount_data(mount_info.parsed);
nfs_free_fhandle(mount_info.mntfh);
return mntroot;
}
+EXPORT_SYMBOL_GPL(nfs_fs_mount);
/*
* Ensure that we unregister the bdi before kill_anon_super
@@ -2417,6 +2440,7 @@ void nfs_put_super(struct super_block *s)
bdi_unregister(&server->backing_dev_info);
}
+EXPORT_SYMBOL_GPL(nfs_put_super);
/*
* Destroy an NFS2/3 superblock
@@ -2429,31 +2453,38 @@ void nfs_kill_super(struct super_block *s)
nfs_fscache_release_super_cookie(s);
nfs_free_server(server);
}
+EXPORT_SYMBOL_GPL(nfs_kill_super);
/*
* Clone an NFS2/3/4 server record on xdev traversal (FSID-change)
*/
struct dentry *
-nfs_xdev_mount_common(struct file_system_type *fs_type, int flags,
- const char *dev_name, struct nfs_mount_info *mount_info)
+nfs_xdev_mount(struct file_system_type *fs_type, int flags,
+ const char *dev_name, void *raw_data)
{
- struct nfs_clone_mount *data = mount_info->cloned;
+ struct nfs_clone_mount *data = raw_data;
+ struct nfs_mount_info mount_info = {
+ .fill_super = nfs_clone_super,
+ .set_security = nfs_clone_sb_security,
+ .cloned = data,
+ };
struct nfs_server *server;
struct dentry *mntroot = ERR_PTR(-ENOMEM);
+ struct nfs_subversion *nfs_mod = NFS_SB(data->sb)->nfs_client->cl_nfs_mod;
int error;
dprintk("--> nfs_xdev_mount_common()\n");
- mount_info->mntfh = data->fh;
+ mount_info.mntfh = mount_info.cloned->fh;
/* create a new volume representation */
- server = nfs_clone_server(NFS_SB(data->sb), data->fh, data->fattr, data->authflavor);
+ server = nfs_mod->rpc_ops->clone_server(NFS_SB(data->sb), data->fh, data->fattr, data->authflavor);
if (IS_ERR(server)) {
error = PTR_ERR(server);
goto out_err;
}
- mntroot = nfs_fs_mount_common(fs_type, server, flags, dev_name, mount_info);
+ mntroot = nfs_fs_mount_common(server, flags, dev_name, &mount_info, nfs_mod);
dprintk("<-- nfs_xdev_mount_common() = 0\n");
out:
return mntroot;
@@ -2463,22 +2494,7 @@ out_err:
goto out;
}
-/*
- * Clone an NFS2/3 server record on xdev traversal (FSID-change)
- */
-static struct dentry *
-nfs_xdev_mount(struct file_system_type *fs_type, int flags,
- const char *dev_name, void *raw_data)
-{
- struct nfs_mount_info mount_info = {
- .fill_super = nfs_clone_super,
- .set_security = nfs_clone_sb_security,
- .cloned = raw_data,
- };
- return nfs_xdev_mount_common(&nfs_fs_type, flags, dev_name, &mount_info);
-}
-
-#ifdef CONFIG_NFS_V4
+#if IS_ENABLED(CONFIG_NFS_V4)
static void nfs4_validate_mount_flags(struct nfs_parsed_mount_data *args)
{
@@ -2577,4 +2593,56 @@ out_no_address:
return -EINVAL;
}
+/*
+ * NFS v4 module parameters need to stay in the
+ * NFS client for backwards compatibility
+ */
+unsigned int nfs_callback_set_tcpport;
+unsigned short nfs_callback_tcpport;
+/* Default cache timeout is 10 minutes */
+unsigned int nfs_idmap_cache_timeout = 600;
+/* Turn off NFSv4 uid/gid mapping when using AUTH_SYS */
+bool nfs4_disable_idmapping = true;
+unsigned short max_session_slots = NFS4_DEF_SLOT_TABLE_SIZE;
+unsigned short send_implementation_id = 1;
+
+EXPORT_SYMBOL_GPL(nfs_callback_set_tcpport);
+EXPORT_SYMBOL_GPL(nfs_callback_tcpport);
+EXPORT_SYMBOL_GPL(nfs_idmap_cache_timeout);
+EXPORT_SYMBOL_GPL(nfs4_disable_idmapping);
+EXPORT_SYMBOL_GPL(max_session_slots);
+EXPORT_SYMBOL_GPL(send_implementation_id);
+
+#define NFS_CALLBACK_MAXPORTNR (65535U)
+
+static int param_set_portnr(const char *val, const struct kernel_param *kp)
+{
+ unsigned long num;
+ int ret;
+
+ if (!val)
+ return -EINVAL;
+ ret = strict_strtoul(val, 0, &num);
+ if (ret == -EINVAL || num > NFS_CALLBACK_MAXPORTNR)
+ return -EINVAL;
+ *((unsigned int *)kp->arg) = num;
+ return 0;
+}
+static struct kernel_param_ops param_ops_portnr = {
+ .set = param_set_portnr,
+ .get = param_get_uint,
+};
+#define param_check_portnr(name, p) __param_check(name, p, unsigned int);
+
+module_param_named(callback_tcpport, nfs_callback_set_tcpport, portnr, 0644);
+module_param(nfs_idmap_cache_timeout, int, 0644);
+module_param(nfs4_disable_idmapping, bool, 0644);
+MODULE_PARM_DESC(nfs4_disable_idmapping,
+ "Turn off NFSv4 idmapping when using 'sec=sys'");
+module_param(max_session_slots, ushort, 0644);
+MODULE_PARM_DESC(max_session_slots, "Maximum number of outstanding NFSv4.1 "
+ "requests the client will negotiate");
+module_param(send_implementation_id, ushort, 0644);
+MODULE_PARM_DESC(send_implementation_id,
+ "Send implementation ID with NFSv4.1 exchange_id");
#endif /* CONFIG_NFS_V4 */
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-26 06:33:05 +0000