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mount options: add generic_show_options()

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Add a new s_options field to struct super_block.  Filesystems can save
mount options passed to them in mount or remount.  It is automatically
freed when the superblock is destroyed.

A new helper function, generic_show_options() is introduced, which uses
this field to display the mount options in /proc/mounts.

Another helper function, save_mount_options() may be used by
filesystems to save the options in the super block.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Miklos Szeredi
2008-02-08 04:21:35 -08:00
committed by Linus Torvalds
parent f84e3f521e
commit b3b304a23a
3 changed files with 54 additions and 5 deletions
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fs/super.c
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@ -105,6 +105,7 @@ static inline void destroy_super(struct super_block *s)
{
security_sb_free(s);
kfree(s->s_subtype);
kfree(s->s_options);
kfree(s);
}