From 0e55a7cca4b66f625d67b292f80b6a976e77c51b Mon Sep 17 00:00:00 2001 From: Dan Williams Date: Fri, 26 Sep 2008 19:01:20 -0700 Subject: [PATCH] [RFC PATCH] touch_mnt_namespace when the mount flags change Daemons that need to be launched while the rootfs is read-only can now poll /proc/mounts to be notified when their O_RDWR requests may no longer end in EROFS. Cc: Kay Sievers Cc: Neil Brown Signed-off-by: Dan Williams --- fs/namespace.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/fs/namespace.c b/fs/namespace.c index f527a0d6c64d..cce46702d33c 100644 --- a/fs/namespace.c +++ b/fs/namespace.c @@ -1550,8 +1550,13 @@ static int do_remount(struct path *path, int flags, int mnt_flags, if (!err) path->mnt->mnt_flags = mnt_flags; up_write(&sb->s_umount); - if (!err) + if (!err) { security_sb_post_remount(path->mnt, flags, data); + + spin_lock(&vfsmount_lock); + touch_mnt_namespace(path->mnt->mnt_ns); + spin_unlock(&vfsmount_lock); + } return err; }