[Ocfs2-tools-devel] [PATCH 7/8] Mess up extent block ECC

[Goldwyn Rodrigues]

Signed-off-by: Goldwyn Rodrigues <rgoldwyn at suse.de>
---
 fswreck/corrupt.c           |    3 +++
 fswreck/extent.c            |   13 +++++++++++--
 fswreck/include/fsck_type.h |    1 +
 fswreck/main.c              |    2 ++
 4 files changed, 17 insertions(+), 2 deletions(-)

diff --git a/fswreck/corrupt.c b/fswreck/corrupt.c
index 86c2b47..eac28a0 100644
--- a/fswreck/corrupt.c
+++ b/fswreck/corrupt.c
@@ -71,6 +71,9 @@ void corrupt_file(ocfs2_filesys *fs, enum fsck_type
type, uint16_t slotnum)
 	case EB_GEN_FIX:
 		func = mess_up_extent_block;
 		break;
+	case EB_INVALID_ECC:
+		func = mess_up_extent_block;
+		break;
 	case EXTENT_EB_INVALID:
 		func = mess_up_extent_block;
 		break;
diff --git a/fswreck/extent.c b/fswreck/extent.c
index e36deb9..279ee24 100644
--- a/fswreck/extent.c
+++ b/fswreck/extent.c
@@ -206,12 +206,21 @@ static void damage_extent_block(ocfs2_filesys
*fs, uint64_t blkno,
 				"change blkno from %d to %d\n",
 				blkno, oldno, eb->h_list.l_next_free_rec);
 			break;
+		case EB_INVALID_ECC:
+			eb->h_check.bc_crc32e ^= 15;
+			eb->h_check.bc_ecc ^= 7;
+			fprintf(stdout, "EB_INVALID_ECC: Corrupt "
+					"inode#%"PRIu64", extent block %"
+					PRIu64"\n", blkno,
+					(unsigned long )eb->h_blkno);
+			break;
 		default:
 			FSWRK_FATAL("Invalid type=%d", type);
 		}

-		ret = ocfs2_write_extent_block(fs, el->l_recs[0].e_blkno,
-					       extbuf);
+		ocfs2_swap_extent_block_from_cpu(fs, eb);
+		ret = io_write_block(fs->fs_io, el->l_recs[0].e_blkno, 1,
+				extbuf);
 		if (ret)
 			FSWRK_COM_FATAL(progname, ret);
 		
diff --git a/fswreck/include/fsck_type.h b/fswreck/include/fsck_type.h
index a5c3989..bdafa6f 100644
--- a/fswreck/include/fsck_type.h
+++ b/fswreck/include/fsck_type.h
@@ -164,6 +164,7 @@ enum fsck_type
 	DUP_CLUSTERS_ADD_REFCOUNT,
 	SUPERBLOCK_INVALID_ECC,
 	INODE_INVALID_ECC,
+	EB_INVALID_ECC,
 	NUM_FSCK_TYPE
 };

diff --git a/fswreck/main.c b/fswreck/main.c
index 5584459..e2f7258 100644
--- a/fswreck/main.c
+++ b/fswreck/main.c
@@ -57,6 +57,8 @@ static struct prompt_code prompt_codes[NUM_FSCK_TYPE] = {
 	define_prompt_code(EB_GEN_FIX, corrupt_file,
 			   "Corrupt an extent block's generation number "
 			   "so that fsck.ocfs2 can fix it"),
+	define_prompt_code(EB_INVALID_ECC, corrupt_file,
+			   "Corrupt an extent block's ECC"),
 	define_prompt_code(EXTENT_EB_INVALID, corrupt_file,
 			   "Corrupt an extent block's generation number"),
 	define_prompt_code(EXTENT_MARKED_UNWRITTEN, corrupt_file,
-- 
1.7.6