mirror of
https://github.com/torvalds/linux.git
synced 2025-11-04 10:40:15 +02:00
NFS: Create a common fs_mount() function
The nfs4_remote_mount() function was only slightly different from the nfs_fs_mount() function used by the generic client. I created a new nfs_mount_info structure to set different parameters to help combine these functions. Signed-off-by: Bryan Schumaker <bjschuma@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Bryan Schumaker
Trond Myklebust
parent
586f95cd4f
commit
c40f8d1d35
1 changed files with 76 additions and 109 deletions
185
fs/nfs/super.c
185
fs/nfs/super.c
|
|
@ -277,6 +277,11 @@ static match_table_t nfs_vers_tokens = {
|
|||
{ Opt_vers_err, NULL }
|
||||
};
|
||||
|
||||
struct nfs_mount_info {
|
||||
void (*fill_super)(struct super_block *, struct nfs_mount_info *);
|
||||
struct nfs_parsed_mount_data *parsed;
|
||||
};
|
||||
|
||||
static void nfs_umount_begin(struct super_block *);
|
||||
static int nfs_statfs(struct dentry *, struct kstatfs *);
|
||||
static int nfs_show_options(struct seq_file *, struct dentry *);
|
||||
|
|
@ -2129,8 +2134,9 @@ static inline void nfs_initialise_sb(struct super_block *sb)
|
|||
* Finish setting up an NFS2/3 superblock
|
||||
*/
|
||||
static void nfs_fill_super(struct super_block *sb,
|
||||
struct nfs_parsed_mount_data *data)
|
||||
struct nfs_mount_info *mount_info)
|
||||
{
|
||||
struct nfs_parsed_mount_data *data = mount_info->parsed;
|
||||
struct nfs_server *server = NFS_SB(sb);
|
||||
|
||||
sb->s_blocksize_bits = 0;
|
||||
|
|
@ -2304,47 +2310,21 @@ static int nfs_bdi_register(struct nfs_server *server)
|
|||
return bdi_register_dev(&server->backing_dev_info, server->s_dev);
|
||||
}
|
||||
|
||||
static struct dentry *nfs_fs_mount(struct file_system_type *fs_type,
|
||||
int flags, const char *dev_name, void *raw_data)
|
||||
static struct dentry *nfs_fs_mount_common(struct file_system_type *fs_type,
|
||||
struct nfs_server *server,
|
||||
int flags, const char *dev_name,
|
||||
struct nfs_fh *mntfh,
|
||||
struct nfs_mount_info *mount_info)
|
||||
{
|
||||
struct nfs_server *server = NULL;
|
||||
struct super_block *s;
|
||||
struct nfs_parsed_mount_data *data;
|
||||
struct nfs_fh *mntfh;
|
||||
struct dentry *mntroot = ERR_PTR(-ENOMEM);
|
||||
int (*compare_super)(struct super_block *, void *) = nfs_compare_super;
|
||||
struct nfs_sb_mountdata sb_mntdata = {
|
||||
.mntflags = flags,
|
||||
.server = server,
|
||||
};
|
||||
int error;
|
||||
|
||||
data = nfs_alloc_parsed_mount_data(NFS_DEFAULT_VERSION);
|
||||
mntfh = nfs_alloc_fhandle();
|
||||
if (data == NULL || mntfh == NULL)
|
||||
goto out;
|
||||
|
||||
/* Validate the mount data */
|
||||
error = nfs_validate_mount_data(raw_data, data, mntfh, dev_name);
|
||||
if (error < 0) {
|
||||
mntroot = ERR_PTR(error);
|
||||
goto out;
|
||||
}
|
||||
|
||||
#ifdef CONFIG_NFS_V4
|
||||
if (data->version == 4) {
|
||||
mntroot = nfs4_try_mount(flags, dev_name, data);
|
||||
goto out;
|
||||
}
|
||||
#endif /* CONFIG_NFS_V4 */
|
||||
|
||||
/* Get a volume representation */
|
||||
server = nfs_create_server(data, mntfh);
|
||||
if (IS_ERR(server)) {
|
||||
mntroot = ERR_CAST(server);
|
||||
goto out;
|
||||
}
|
||||
sb_mntdata.server = server;
|
||||
|
||||
if (server->flags & NFS_MOUNT_UNSHARED)
|
||||
compare_super = NULL;
|
||||
|
||||
|
|
@ -2372,23 +2352,21 @@ static struct dentry *nfs_fs_mount(struct file_system_type *fs_type,
|
|||
|
||||
if (!s->s_root) {
|
||||
/* initial superblock/root creation */
|
||||
nfs_fill_super(s, data);
|
||||
nfs_get_cache_cookie(s, data, NULL);
|
||||
mount_info->fill_super(s, mount_info);
|
||||
nfs_get_cache_cookie(s, mount_info->parsed, NULL);
|
||||
}
|
||||
|
||||
mntroot = nfs_get_root(s, mntfh, dev_name);
|
||||
if (IS_ERR(mntroot))
|
||||
goto error_splat_super;
|
||||
|
||||
error = security_sb_set_mnt_opts(s, &data->lsm_opts);
|
||||
error = security_sb_set_mnt_opts(s, &mount_info->parsed->lsm_opts);
|
||||
if (error)
|
||||
goto error_splat_root;
|
||||
|
||||
s->s_flags |= MS_ACTIVE;
|
||||
|
||||
out:
|
||||
nfs_free_parsed_mount_data(data);
|
||||
nfs_free_fhandle(mntfh);
|
||||
return mntroot;
|
||||
|
||||
out_err_nosb:
|
||||
|
|
@ -2406,6 +2384,52 @@ static struct dentry *nfs_fs_mount(struct file_system_type *fs_type,
|
|||
goto out;
|
||||
}
|
||||
|
||||
static struct dentry *nfs_fs_mount(struct file_system_type *fs_type,
|
||||
int flags, const char *dev_name, void *raw_data)
|
||||
{
|
||||
struct nfs_server *server;
|
||||
struct nfs_parsed_mount_data *data = NULL;
|
||||
struct nfs_mount_info mount_info = {
|
||||
.fill_super = nfs_fill_super,
|
||||
};
|
||||
struct nfs_fh *mntfh;
|
||||
struct dentry *mntroot = ERR_PTR(-ENOMEM);
|
||||
int error;
|
||||
|
||||
data = nfs_alloc_parsed_mount_data(NFS_DEFAULT_VERSION);
|
||||
mntfh = nfs_alloc_fhandle();
|
||||
if (data == NULL || mntfh == NULL)
|
||||
goto out;
|
||||
|
||||
/* Validate the mount data */
|
||||
error = nfs_validate_mount_data(raw_data, data, mntfh, dev_name);
|
||||
if (error < 0) {
|
||||
mntroot = ERR_PTR(error);
|
||||
goto out;
|
||||
}
|
||||
mount_info.parsed = data;
|
||||
|
||||
#ifdef CONFIG_NFS_V4
|
||||
if (data->version == 4) {
|
||||
mntroot = nfs4_try_mount(flags, dev_name, data);
|
||||
goto out;
|
||||
}
|
||||
#endif /* CONFIG_NFS_V4 */
|
||||
|
||||
/* Get a volume representation */
|
||||
server = nfs_create_server(data, mntfh);
|
||||
if (IS_ERR(server)) {
|
||||
mntroot = ERR_CAST(server);
|
||||
goto out;
|
||||
}
|
||||
|
||||
mntroot = nfs_fs_mount_common(fs_type, server, flags, dev_name, mntfh, &mount_info);
|
||||
out:
|
||||
nfs_free_parsed_mount_data(data);
|
||||
nfs_free_fhandle(mntfh);
|
||||
return mntroot;
|
||||
}
|
||||
|
||||
/*
|
||||
* Ensure that we unregister the bdi before kill_anon_super
|
||||
* releases the device name
|
||||
|
|
@ -2544,7 +2568,8 @@ static void nfs4_clone_super(struct super_block *sb,
|
|||
/*
|
||||
* Set up an NFS4 superblock
|
||||
*/
|
||||
static void nfs4_fill_super(struct super_block *sb)
|
||||
static void nfs4_fill_super(struct super_block *sb,
|
||||
struct nfs_mount_info *mount_info)
|
||||
{
|
||||
sb->s_time_gran = 1;
|
||||
sb->s_op = &nfs4_sops;
|
||||
|
|
@ -2696,89 +2721,31 @@ static struct dentry *
|
|||
nfs4_remote_mount(struct file_system_type *fs_type, int flags,
|
||||
const char *dev_name, void *raw_data)
|
||||
{
|
||||
struct nfs_parsed_mount_data *data = raw_data;
|
||||
struct super_block *s;
|
||||
struct nfs_mount_info mount_info = {
|
||||
.fill_super = nfs4_fill_super,
|
||||
.parsed = raw_data,
|
||||
};
|
||||
struct nfs_server *server;
|
||||
struct nfs_fh *mntfh;
|
||||
struct dentry *mntroot;
|
||||
int (*compare_super)(struct super_block *, void *) = nfs_compare_super;
|
||||
struct nfs_sb_mountdata sb_mntdata = {
|
||||
.mntflags = flags,
|
||||
};
|
||||
int error = -ENOMEM;
|
||||
struct dentry *mntroot = ERR_PTR(-ENOMEM);
|
||||
|
||||
mntfh = nfs_alloc_fhandle();
|
||||
if (data == NULL || mntfh == NULL)
|
||||
if (mount_info.parsed == NULL || mntfh == NULL)
|
||||
goto out;
|
||||
|
||||
/* Get a volume representation */
|
||||
server = nfs4_create_server(data, mntfh);
|
||||
server = nfs4_create_server(mount_info.parsed, mntfh);
|
||||
if (IS_ERR(server)) {
|
||||
error = PTR_ERR(server);
|
||||
mntroot = ERR_CAST(server);
|
||||
goto out;
|
||||
}
|
||||
sb_mntdata.server = server;
|
||||
|
||||
if (server->flags & NFS_MOUNT_UNSHARED)
|
||||
compare_super = NULL;
|
||||
|
||||
/* -o noac implies -o sync */
|
||||
if (server->flags & NFS_MOUNT_NOAC)
|
||||
sb_mntdata.mntflags |= MS_SYNCHRONOUS;
|
||||
|
||||
/* Get a superblock - note that we may end up sharing one that already exists */
|
||||
s = sget(&nfs4_fs_type, compare_super, nfs_set_super, &sb_mntdata);
|
||||
if (IS_ERR(s)) {
|
||||
error = PTR_ERR(s);
|
||||
goto out_free;
|
||||
}
|
||||
|
||||
if (s->s_fs_info != server) {
|
||||
nfs_free_server(server);
|
||||
server = NULL;
|
||||
} else {
|
||||
error = nfs_bdi_register(server);
|
||||
if (error)
|
||||
goto error_splat_bdi;
|
||||
}
|
||||
|
||||
if (!s->s_root) {
|
||||
/* initial superblock/root creation */
|
||||
nfs4_fill_super(s);
|
||||
nfs_get_cache_cookie(s, data, NULL);
|
||||
}
|
||||
|
||||
mntroot = nfs_get_root(s, mntfh, dev_name);
|
||||
if (IS_ERR(mntroot)) {
|
||||
error = PTR_ERR(mntroot);
|
||||
goto error_splat_super;
|
||||
}
|
||||
|
||||
error = security_sb_set_mnt_opts(s, &data->lsm_opts);
|
||||
if (error)
|
||||
goto error_splat_root;
|
||||
|
||||
s->s_flags |= MS_ACTIVE;
|
||||
|
||||
nfs_free_fhandle(mntfh);
|
||||
return mntroot;
|
||||
mntroot = nfs_fs_mount_common(fs_type, server, flags,
|
||||
dev_name, mntfh, &mount_info);
|
||||
|
||||
out:
|
||||
nfs_free_fhandle(mntfh);
|
||||
return ERR_PTR(error);
|
||||
|
||||
out_free:
|
||||
nfs_free_server(server);
|
||||
goto out;
|
||||
|
||||
error_splat_root:
|
||||
dput(mntroot);
|
||||
error_splat_super:
|
||||
if (server && !s->s_root)
|
||||
bdi_unregister(&server->backing_dev_info);
|
||||
error_splat_bdi:
|
||||
deactivate_locked_super(s);
|
||||
goto out;
|
||||
return mntroot;
|
||||
}
|
||||
|
||||
static struct vfsmount *nfs_do_root_mount(struct file_system_type *fs_type,
|
||||
|
|
@ -3099,7 +3066,7 @@ nfs4_remote_referral_mount(struct file_system_type *fs_type, int flags,
|
|||
|
||||
if (!s->s_root) {
|
||||
/* initial superblock/root creation */
|
||||
nfs4_fill_super(s);
|
||||
nfs4_fill_super(s, NULL);
|
||||
nfs_get_cache_cookie(s, NULL, data);
|
||||
}
|
||||
|
||||
|
|
|
|||
Loading…
Reference in a new issue