From: Amir Goldstein Date: Sat, 26 Feb 2011 20:40:19 +0000 (+0200) Subject: ext3: skip orphan cleanup on rocompat fs X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=ce654b37f87980d95f339080e4c3bdb2370bdf22;p=deliverable%2Flinux.git ext3: skip orphan cleanup on rocompat fs Orphan cleanup is currently executed even if the file system has some number of unknown ROCOMPAT features, which deletes inodes and frees blocks, which could be very bad for some RO_COMPAT features. This patch skips the orphan cleanup if it contains readonly compatible features not known by this ext3 implementation, which would prevent the fs from being mounted (or remounted) readwrite. Signed-off-by: Amir Goldstein Signed-off-by: Jan Kara --- diff --git a/fs/ext3/super.c b/fs/ext3/super.c index 85c8cc8f2473..0d62f29f213a 100644 --- a/fs/ext3/super.c +++ b/fs/ext3/super.c @@ -1464,6 +1464,13 @@ static void ext3_orphan_cleanup (struct super_block * sb, return; } + /* Check if feature set allows readwrite operations */ + if (EXT3_HAS_RO_COMPAT_FEATURE(sb, ~EXT3_FEATURE_RO_COMPAT_SUPP)) { + ext3_msg(sb, KERN_INFO, "Skipping orphan cleanup due to " + "unknown ROCOMPAT features"); + return; + } + if (EXT3_SB(sb)->s_mount_state & EXT3_ERROR_FS) { if (es->s_last_orphan) jbd_debug(1, "Errors on filesystem, "