1
touch_mnt_namespace when the mount flags change
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From: Dan Williams <dan.j.williams@intel.com>
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Daemons that need to be launched while the rootfs is read-only can now
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poll /proc/mounts to be notified when their O_RDWR requests may no
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Cc: Kay Sievers <kay.sievers@vrfy.org>
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Cc: Neil Brown <neilb@suse.de>
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Signed-off-by: Dan Williams <dan.j.williams@intel.com>
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fs/namespace.c | 7 ++++++-
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1 files changed, 6 insertions(+), 1 deletions(-)
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diff --git a/fs/namespace.c b/fs/namespace.c
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index 6e283c9..1bd5ba2 100644
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@@ -1553,8 +1553,13 @@ static noinline int do_remount(struct nameidata *nd, int flags, int mnt_flags,
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nd->path.mnt->mnt_flags = mnt_flags;
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up_write(&sb->s_umount);
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security_sb_post_remount(nd->path.mnt, flags, data);
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+ spin_lock(&vfsmount_lock);
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+ touch_mnt_namespace(nd->path.mnt->mnt_ns);
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+ spin_unlock(&vfsmount_lock);