LU-8364 ldiskfs: fixes for failover mode.

[fs/lustre-release.git] / ldiskfs / kernel_patches / patches / rhel7.2 / ext4-dont-check-before-replay.patch

diff --git a/ldiskfs/kernel_patches/patches/rhel7.2/ext4-dont-check-before-replay.patch b/ldiskfs/kernel_patches/patches/rhel7.2/ext4-dont-check-before-replay.patch
new file mode 100644 (file)
index 0000000..9fb9fa1
--- /dev/null
+++ b/ldiskfs/kernel_patches/patches/rhel7.2/ext4-dont-check-before-replay.patch
@@ -0,0 +1,33 @@
+Index: linux-stage/fs/ext4/super.c
+When ldiskfs run in failover mode whith read-only disk.
+Part of allocation updates are lost and ldiskfs may fail
+while mounting this is due to inconsistent state of
+group-descriptor. Group-descriptor check is added after
+journal replay.
+===================================================================
+--- linux-stage/fs/ext4/super.c        2016-11-06 15:15:30.892386878 +0530
++++ linux-stage.orig.1/fs/ext4/super.c 2016-11-08 10:56:45.579892189 +0530
+@@ -3980,10 +3980,6 @@
+                       goto failed_mount2;
+               }
+       }
+-      if (!ext4_check_descriptors(sb, &first_not_zeroed)) {
+-              ext4_msg(sb, KERN_ERR, "group descriptors corrupted!");
+-              goto failed_mount2;
+-      }
+
+       sbi->s_gdb_count = db_count;
+       get_random_bytes(&sbi->s_next_generation, sizeof(u32));
+@@ -4104,6 +4100,12 @@
+       sbi->s_journal->j_commit_callback = ext4_journal_commit_callback;
+
+ no_journal:
++
++      if (!ext4_check_descriptors(sb, &first_not_zeroed)) {
++              ext4_msg(sb, KERN_ERR, "group descriptors corrupted!");
++              goto failed_mount2;
++      }
++
+       /*
+        * Get the # of file system overhead blocks from the
+        * superblock if present.