[PATCH 10/23] nfs: merge xdev and remote file_system_type

David Howells
2019-05-23T16:17:22Z

they are identical now...

Reviewed-by: David Howells <dhowells@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---

fs/nfs/internal.h | 2 +-
fs/nfs/namespace.c | 2 +-
fs/nfs/nfs4super.c | 22 +---------------------
fs/nfs/super.c | 14 ++++++++------
4 files changed, 11 insertions(+), 29 deletions(-)

diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h
index 47ed7e4b4171..3acf786fce57 100644
--- a/fs/nfs/internal.h
+++ b/fs/nfs/internal.h
@@ -395,7 +395,7 @@ extern int nfs_wait_atomic_killable(atomic_t *p, unsigned int mode);
/* super.c */
extern const struct super_operations nfs_sops;
extern struct file_system_type nfs_fs_type;
-extern struct file_system_type nfs_xdev_fs_type;
+extern struct file_system_type nfs_prepared_fs_type;
#if IS_ENABLED(CONFIG_NFS_V4)
extern struct file_system_type nfs4_referral_fs_type;
#endif
diff --git a/fs/nfs/namespace.c b/fs/nfs/namespace.c
index 476f4c0d5542..7cda42ae000a 100644
--- a/fs/nfs/namespace.c
+++ b/fs/nfs/namespace.c
@@ -253,7 +253,7 @@ struct vfsmount *nfs_do_submount(struct dentry *dentry, struct nfs_fh *fh,
if (IS_ERR(devname))
mnt = ERR_CAST(devname);
else
- mnt = vfs_submount(dentry, &nfs_xdev_fs_type, devname, &mount_info);
+ mnt = vfs_submount(dentry, &nfs_prepared_fs_type, devname, &mount_info);

if (mount_info.server)
nfs_free_server(mount_info.server);
diff --git a/fs/nfs/nfs4super.c b/fs/nfs/nfs4super.c
index 4a57fe53cf32..32b602e87bb5 100644
--- a/fs/nfs/nfs4super.c
+++ b/fs/nfs/nfs4super.c
@@ -17,19 +17,9 @@

static int nfs4_write_inode(struct inode *inode, struct writeback_control *wbc);
static void nfs4_evict_inode(struct inode *inode);
-static struct dentry *nfs4_remote_mount(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *raw_data);
static struct dentry *nfs4_referral_mount(struct file_system_type *fs_type,
int flags, const char *dev_name, void *raw_data);

-static struct file_system_type nfs4_remote_fs_type = {
- .owner = THIS_MODULE,
- .name = "nfs4",
- .mount = nfs4_remote_mount,
- .kill_sb = nfs_kill_super,
- .fs_flags = FS_RENAME_DOES_D_MOVE|FS_BINARY_MOUNTDATA,
-};
-
struct file_system_type nfs4_referral_fs_type = {
.owner = THIS_MODULE,
.name = "nfs4",
@@ -90,16 +80,6 @@ static void nfs4_evict_inode(struct inode *inode)
nfs_clear_inode(inode);
}

-/*
- * Get the superblock for the NFS4 root partition
- */
-static struct dentry *
-nfs4_remote_mount(struct file_system_type *fs_type, int flags,
- const char *dev_name, void *info)
-{
- return nfs_fs_mount_common(flags, dev_name, info);
-}
-
struct nfs_referral_count {
struct list_head list;
const struct task_struct *task;
@@ -193,7 +173,7 @@ static struct dentry *do_nfs4_mount(struct nfs_server *server, int flags,
else
snprintf(root_devname, len, "%s:/", hostname);
info->server = server;
- root_mnt = vfs_kern_mount(&nfs4_remote_fs_type, flags, root_devname, info);
+ root_mnt = vfs_kern_mount(&nfs_prepared_fs_type, flags, root_devname, info);
if (info->server)
nfs_free_server(info->server);
info->server = NULL;
diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index a713b70bfec4..e189d640fb4f 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -287,7 +287,7 @@ static match_table_t nfs_vers_tokens = {
{ Opt_vers_err, NULL }
};

-static struct dentry *nfs_xdev_mount(struct file_system_type *fs_type,
+static struct dentry *nfs_prepared_mount(struct file_system_type *fs_type,
int flags, const char *dev_name, void *raw_data);

struct file_system_type nfs_fs_type = {
@@ -300,13 +300,14 @@ struct file_system_type nfs_fs_type = {
MODULE_ALIAS_FS("nfs");
EXPORT_SYMBOL_GPL(nfs_fs_type);

-struct file_system_type nfs_xdev_fs_type = {
+struct file_system_type nfs_prepared_fs_type = {
.owner = THIS_MODULE,
.name = "nfs",
- .mount = nfs_xdev_mount,
+ .mount = nfs_prepared_mount,
.kill_sb = nfs_kill_super,
.fs_flags = FS_RENAME_DOES_D_MOVE|FS_BINARY_MOUNTDATA,
};
+EXPORT_SYMBOL_GPL(nfs_prepared_fs_type);

const struct super_operations nfs_sops = {
.alloc_inode = nfs_alloc_inode,
@@ -2743,11 +2744,12 @@ void nfs_kill_super(struct super_block *s)
EXPORT_SYMBOL_GPL(nfs_kill_super);

/*
- * Clone an NFS2/3/4 server record on xdev traversal (FSID-change)
+ * Internal use only: mount_info is already set up by caller.
+ * Used for mountpoint crossings and for nfs4 root.
*/
static struct dentry *
-nfs_xdev_mount(struct file_system_type *fs_type, int flags,
- const char *dev_name, void *raw_data)
+nfs_prepared_mount(struct file_system_type *fs_type, int flags,
+ const char *dev_name, void *raw_data)
{
return nfs_fs_mount_common(flags, dev_name, raw_data);
}