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VFS: Don't use save/replace_mount_options if not using generic_show_options 

btrfs, debugfs, reiserfs and tracefs call save_mount_options() and reiserfs
calls replace_mount_options(), but they then implement their own
->show_options() methods and don't touch s_options, rendering the saved
options unnecessary.  I'm trying to eliminate s_options to make it easier
to implement a context-based mount where the mount options can be passed
individually over a file descriptor.

Remove the calls to save/replace_mount_options() call in these cases.

Signed-off-by: David Howells <dhowells@redhat.com>
cc: Chris Mason <clm@fb.com>
cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
cc: Steven Rostedt <rostedt@goodmis.org>
cc: linux-btrfs@vger.kernel.org
cc: reiserfs-devel@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
David Howells 2017-07-05 16:24:09 +01:00 committed by Al Viro
parent cdf01226b2
commit c3d98ea082
4 changed files with 0 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
fs/btrfs/super.c
View File

@ -1164,7 +1164,6 @@ static int btrfs_fill_super(struct super_block *sb,
goto fail_close;
}
save_mount_options(sb, data);
cleancache_init_fs(sb);
sb->s_flags |= MS_ACTIVE;
return 0;

2
fs/debugfs/inode.c
View File

@ -203,8 +203,6 @@ static int debug_fill_super(struct super_block *sb, void *data, int silent)
struct debugfs_fs_info *fsi;
int err;
save_mount_options(sb, data);
fsi = kzalloc(sizeof(struct debugfs_fs_info), GFP_KERNEL);
sb->s_fs_info = fsi;
if (!fsi) {

4
fs/reiserfs/super.c
View File

@ -1599,8 +1599,6 @@ static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg)
}
out_ok_unlocked:
if (new_opts)
replace_mount_options(s, new_opts);
return 0;
out_err_unlock:
@ -1916,8 +1914,6 @@ static int reiserfs_fill_super(struct super_block *s, void *data, int silent)
char *qf_names[REISERFS_MAXQUOTAS] = {};
unsigned int qfmt = 0;
save_mount_options(s, data);
sbi = kzalloc(sizeof(struct reiserfs_sb_info), GFP_KERNEL);
if (!sbi)
return -ENOMEM;

2
fs/tracefs/inode.c
View File

@ -270,8 +270,6 @@ static int trace_fill_super(struct super_block *sb, void *data, int silent)
struct tracefs_fs_info *fsi;
int err;
save_mount_options(sb, data);
fsi = kzalloc(sizeof(struct tracefs_fs_info), GFP_KERNEL);
sb->s_fs_info = fsi;
if (!fsi) {