[Ocfs2-tools-devel] [PATCH 5/5] Fswreck: Implement corruption code CLUSTER_ALLOC_BIT.

[Tristan Ye]

Simply corrupt the global bitmap by allocating a new cluster,
without actually using it later.

Signed-off-by: Tristan Ye <tristan.ye at oracle.com>
---
 fswreck/corrupt.c       |    3 +++
 fswreck/group.c         |   21 +++++++++++++++++++++
 fswreck/include/group.h |    2 ++
 fswreck/main.c          |    4 ++--
 4 files changed, 28 insertions(+), 2 deletions(-)

diff --git a/fswreck/corrupt.c b/fswreck/corrupt.c
index 8ea8513..a724268 100644
--- a/fswreck/corrupt.c
+++ b/fswreck/corrupt.c
@@ -334,6 +334,9 @@ void corrupt_group_desc(ocfs2_filesys *fs, enum fsck_type type,
 	case CLUSTER_GROUP_DESC:
 		func = mess_up_cluster_group_desc;
 		break;
+	case CLUSTER_ALLOC_BIT:
+		func = mess_up_cluster_alloc_bits;
+		break;
 	default:
 		FSWRK_FATAL("Invalid code=%d", type);
 	}
diff --git a/fswreck/group.c b/fswreck/group.c
index aa0298c..45a460b 100644
--- a/fswreck/group.c
+++ b/fswreck/group.c
@@ -296,3 +296,24 @@ void mess_up_cluster_group_desc(ocfs2_filesys *fs, enum fsck_type type,
 	if (buf)
 		ocfs2_free(&buf);
 }
+
+/*
+ * Simply corrupt the global bitmap by allocating a new cluster, without
+ * actually using it later.
+ */
+void mess_up_cluster_alloc_bits(ocfs2_filesys *fs, enum fsck_type type,
+				uint16_t slotnum)
+{
+	errcode_t ret;
+	uint32_t n_clusters;
+	uint64_t blkno;
+
+	ret = ocfs2_new_clusters(fs, 1, 1, &blkno, &n_clusters);
+	if (ret) {
+		FSWRK_COM_FATAL(progname, ret);
+		ocfs2_free_clusters(fs, 1, blkno);
+	}
+
+	fprintf(stdout ,"Mark bits of global bitmap by unused "
+		"block#%"PRIu64".\n", blkno);
+}
diff --git a/fswreck/include/group.h b/fswreck/include/group.h
index 0af524a..b7e23ca 100644
--- a/fswreck/include/group.h
+++ b/fswreck/include/group.h
@@ -33,5 +33,7 @@ void mess_up_group_list(ocfs2_filesys *fs, enum fsck_type type,
 			uint16_t slotnum);
 void mess_up_cluster_group_desc(ocfs2_filesys *fs, enum fsck_type type,
 				uint16_t slotnum);
+void mess_up_cluster_alloc_bits(ocfs2_filesys *fs, enum fsck_type type,
+				uint16_t slotnum);
 
 #endif		/* __GROUP_H */
diff --git a/fswreck/main.c b/fswreck/main.c
index e75e4de..76c3039 100644
--- a/fswreck/main.c
+++ b/fswreck/main.c
@@ -169,8 +169,8 @@ static struct prompt_code prompt_codes[NUM_FSCK_TYPE] = {
 			   "Corrupt chain list's header blkno"),
 	define_prompt_code(CHAIN_BITS, corrupt_sys_file,
 			   "Corrupt chain's total bits"),
-	define_prompt_code(CLUSTER_ALLOC_BIT, NULL,
-			   "Unimplemented corrupt code"),
+	define_prompt_code(CLUSTER_ALLOC_BIT, corrupt_group_desc,
+			   "Mark bits of global bitmap by unused clusters"),
 	define_prompt_code(CHAIN_I_CLUSTERS, corrupt_sys_file,
 			   "Corrupt chain allocator's i_clusters"),
 	define_prompt_code(CHAIN_I_SIZE, corrupt_sys_file,
-- 
1.5.5