By calling mount(2) with MS_REMOUNT | MS_BIND on a non-bind readonly mountpoint, it is possible to have a readonly mount without MNT_READONLY in its mnt_flags. Currently, statfs will not set the ST_RDONLY flag in f_flags for such a mount, even though for all intents and purposes it is still readonly. This patch makes vfs_statfs set ST_RDONLY in f_flags if mnt_sb->s_flags contains MS_RDONLY. Signed-off-by: Shea Levy <shea@xxxxxxxxxxxx> --- fs/statfs.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/fs/statfs.c b/fs/statfs.c index c219e733..c614087 100644 --- a/fs/statfs.c +++ b/fs/statfs.c @@ -37,6 +37,8 @@ static int flags_by_sb(int s_flags) flags |= ST_SYNCHRONOUS; if (s_flags & MS_MANDLOCK) flags |= ST_MANDLOCK; + if (s_flags & MS_RDONLY) + flags |= ST_RDONLY; return flags; } -- 1.8.1.3 -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
