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gfs2: fs: derive f_fsid from s_uuid

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gfs2 already has optional persistent uuid.

Use that uuid to report f_fsid in statfs(2), same as ext2/ext4/zonefs.

This allows gfs2 to be monitored by fanotify filesystem watch.
for example, with inotify-tools 4.23.8.0, the following command can be
used to watch changes over entire filesystem:

  fsnotifywatch --filesystem /mnt/gfs2

Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
This commit is contained in:
Amir Goldstein 2023-10-24 10:55:35 +03:00 committed by Andreas Gruenbacher
parent 0b2355fe91
commit d6fc6c9363
1 changed files with 1 additions and 0 deletions
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fs/gfs2/super.c
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@ -1006,6 +1006,7 @@ static int gfs2_statfs(struct dentry *dentry, struct kstatfs *buf)
buf->f_files = sc.sc_dinodes + sc.sc_free;
buf->f_ffree = sc.sc_free;
buf->f_namelen = GFS2_FNAMESIZE;
buf->f_fsid = uuid_to_fsid(sb->s_uuid.b);
return 0;
}