Commit a8e2b636 authored by Carlos Maiolino's avatar Carlos Maiolino Committed by Al Viro

Make statfs properly return read-only state after emergency remount

Emergency remount (sysrq-u) sets MS_RDONLY to the superblock but doesn't set
MNT_READONLY to the mount point.

Once calculate_f_flags() only check for the mount point read only state,
when setting kstatfs flags, after an emergency remount, statfs does not
report the filesystem as read-only, even though it is.

Enable flags_by_sb() to also check for superblock read only state, so the
kstatfs and consequently statfs can properly show the read-only state of
the filesystem.
Signed-off-by: default avatarCarlos Maiolino <>
Signed-off-by: default avatarAl Viro <>
parent 6916363f
......@@ -38,6 +38,8 @@ static int flags_by_sb(int s_flags)
if (s_flags & MS_MANDLOCK)
flags |= ST_MANDLOCK;
if (s_flags & MS_RDONLY)
flags |= ST_RDONLY;
return flags;
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