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Commit a8e2b636 authored by Carlos Maiolino's avatar Carlos Maiolino Committed by Al Viro
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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 <cmaiolino@redhat.com>
Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent 6916363f

fs/statfs.c

+2 −0
Original line number Diff line number Diff line
@@ -38,6 +38,8 @@ 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;

}