X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=btrfs-corrupt-block.c;h=71b4d7711451637d72bfb82e8bb20569ae492075;hb=c1c987503412a8e98e40da2548c6b78888535641;hp=fb6fcaadfe297ea34d140b3d2692c66eb1a26f50;hpb=ee0908ee81e55d730402cd4931513579b34ea792;p=platform%2Fupstream%2Fbtrfs-progs.git

diff --git a/btrfs-corrupt-block.c b/btrfs-corrupt-block.c
index fb6fcaa..71b4d77 100644
--- a/btrfs-corrupt-block.c
+++ b/btrfs-corrupt-block.c
@@ -31,30 +31,32 @@
 #include "transaction.h"
 #include "list.h"
 #include "utils.h"
+#include "help.h"
 
 #define FIELD_BUF_LEN 80
 
-static struct extent_buffer *debug_corrupt_block(struct btrfs_root *root,
-		u64 bytenr, u32 blocksize, u64 copy)
+static int debug_corrupt_block(struct extent_buffer *eb,
+		struct btrfs_root *root, u64 bytenr, u32 blocksize, u64 copy)
 {
 	int ret;
-	struct extent_buffer *eb;
 	u64 length;
 	struct btrfs_multi_bio *multi = NULL;
 	struct btrfs_device *device;
 	int num_copies;
 	int mirror_num = 1;
 
-	eb = btrfs_find_create_tree_block(root->fs_info, bytenr, blocksize);
-	if (!eb)
-		return NULL;
-
 	length = blocksize;
 	while (1) {
 		ret = btrfs_map_block(&root->fs_info->mapping_tree, READ,
 				      eb->start, &length, &multi,
 				      mirror_num, NULL);
-		BUG_ON(ret);
+		if (ret) {
+			error("cannot map block %llu length %llu mirror %d: %d",
+					(unsigned long long)eb->start,
+					(unsigned long long)length,
+					mirror_num, ret);
+			return ret;
+		}
 		device = multi->stripes[0].dev;
 		eb->fd = device->fd;
 		device->total_ios++;
@@ -64,14 +66,26 @@ static struct extent_buffer *debug_corrupt_block(struct btrfs_root *root,
 			"mirror %d logical %llu physical %llu device %s\n",
 			mirror_num, (unsigned long long)bytenr,
 			(unsigned long long)eb->dev_bytenr, device->name);
-		kfree(multi);
+		free(multi);
 
 		if (!copy || mirror_num == copy) {
 			ret = read_extent_from_disk(eb, 0, eb->len);
+			if (ret < 0) {
+				error("cannot read eb bytenr %llu: %s",
+						(unsigned long long)eb->dev_bytenr,
+						strerror(-ret));
+				return ret;
+			}
 			printf("corrupting %llu copy %d\n", eb->start,
 			       mirror_num);
 			memset(eb->data, 0, eb->len);
-			write_extent_to_disk(eb);
+			ret = write_extent_to_disk(eb);
+			if (ret < 0) {
+				error("cannot write eb bytenr %llu: %s",
+						(unsigned long long)eb->dev_bytenr,
+						strerror(-ret));
+				return ret;
+			}
 			fsync(eb->fd);
 		}
 
@@ -84,37 +98,30 @@ static struct extent_buffer *debug_corrupt_block(struct btrfs_root *root,
 		if (mirror_num > num_copies)
 			break;
 	}
-	return eb;
+
+	return 0;
 }
 
 static void print_usage(int ret)
 {
-	fprintf(stderr, "usage: btrfs-corrupt-block [options] device\n");
-	fprintf(stderr, "\t-l Logical extent to be corrupted\n");
-	fprintf(stderr, "\t-c Copy of the extent to be corrupted"
-		" (usually 1 or 2, default: 0)\n");
-	fprintf(stderr, "\t-b Number of bytes to be corrupted\n");
-	fprintf(stderr, "\t-e Extent to be corrupted\n");
-	fprintf(stderr, "\t-E The whole extent tree to be corrupted\n");
-	fprintf(stderr, "\t-u Given chunk item to be corrupted\n");
-	fprintf(stderr, "\t-U The whole chunk tree to be corrupted\n");
-	fprintf(stderr, "\t-i The inode item to corrupt (must also specify "
-		"the field to corrupt)\n");
-	fprintf(stderr, "\t-x The file extent item to corrupt (must also "
-		"specify -i for the inode and -f for the field to corrupt)\n");
-	fprintf(stderr, "\t-m The metadata block to corrupt (must also "
-		"specify -f for the field to corrupt)\n");
-	fprintf(stderr, "\t-K The key to corrupt in the format "
-		"<num>,<num>,<num> (must also specify -f for the field)\n");
-	fprintf(stderr, "\t-f The field in the item to corrupt\n");
-	fprintf(stderr, "\t-I An item to corrupt (must also specify the field "
-		"to corrupt and a root+key for the item)\n");
-	fprintf(stderr, "\t-D Corrupt a dir item, must specify key and field\n");
-	fprintf(stderr, "\t-d Delete this item (must specify -K)\n");
-	fprintf(stderr, "\t-r Operate on this root (only works with -d)\n");
-	fprintf(stderr, "\t-C Delete a csum for the specified bytenr.  When "
-		"used with -b it'll delete that many bytes, otherwise it's "
-		"just sectorsize\n");
+	printf("usage: btrfs-corrupt-block [options] device\n");
+	printf("\t-l   Logical extent to be corrupted\n");
+	printf("\t-c   Copy of the extent to be corrupted (usually 1 or 2, default: 0)\n");
+	printf("\t-b   Number of bytes to be corrupted\n");
+	printf("\t-e   Extent to be corrupted\n");
+	printf("\t-E   The whole extent tree to be corrupted\n");
+	printf("\t-u   Given chunk item to be corrupted\n");
+	printf("\t-U   The whole chunk tree to be corrupted\n");
+	printf("\t-i   The inode item to corrupt (must also specify the field to corrupt)\n");
+	printf("\t-x   The file extent item to corrupt (must also specify -i for the inode and -f for the field to corrupt)\n");
+	printf("\t-m   The metadata block to corrupt (must also specify -f for the field to corrupt)\n");
+	printf("\t-K   The key to corrupt in the format <num>,<num>,<num> (must also specify -f for the field)\n");
+	printf("\t-f   The field in the item to corrupt\n");
+	printf("\t-I   An item to corrupt (must also specify the field to corrupt and a root+key for the item)\n");
+	printf("\t-D   Corrupt a dir item, must specify key and field\n");
+	printf("\t-d   Delete this item (must specify -K)\n");
+	printf("\t-r   Operate on this root (only works with -d)\n");
+	printf("\t-C   Delete a csum for the specified bytenr.  When used with -b it'll delete that many bytes, otherwise it's just sectorsize\n");
 	exit(ret);
 }
 
@@ -131,8 +138,8 @@ static void corrupt_keys(struct btrfs_trans_handle *trans,
 	if (nr == 0)
 		return;
 
-	slot = rand() % nr;
-	bad_slot = rand() % nr;
+	slot = rand_range(nr);
+	bad_slot = rand_range(nr);
 
 	if (bad_slot == slot)
 		return;
@@ -172,7 +179,7 @@ static int corrupt_keys_in_block(struct btrfs_root *root, u64 bytenr)
 }
 
 static int corrupt_extent(struct btrfs_trans_handle *trans,
-			  struct btrfs_root *root, u64 bytenr, u64 copy)
+			  struct btrfs_root *root, u64 bytenr)
 {
 	struct btrfs_key key;
 	struct extent_buffer *leaf;
@@ -181,7 +188,7 @@ static int corrupt_extent(struct btrfs_trans_handle *trans,
 	struct btrfs_path *path;
 	int ret;
 	int slot;
-	int should_del = rand() % 3;
+	int should_del = rand_range(3);
 
 	path = btrfs_alloc_path();
 	if (!path)
@@ -258,13 +265,13 @@ static void btrfs_corrupt_extent_leaf(struct btrfs_trans_handle *trans,
 				      struct extent_buffer *eb)
 {
 	u32 nr = btrfs_header_nritems(eb);
-	u32 victim = rand() % nr;
+	u32 victim = rand_range(nr);
 	u64 objectid;
 	struct btrfs_key key;
 
 	btrfs_item_key_to_cpu(eb, &key, victim);
 	objectid = key.objectid;
-	corrupt_extent(trans, root, objectid, 1);
+	corrupt_extent(trans, root, objectid);
 }
 
 static void btrfs_corrupt_extent_tree(struct btrfs_trans_handle *trans,
@@ -282,7 +289,7 @@ static void btrfs_corrupt_extent_tree(struct btrfs_trans_handle *trans,
 	}
 
 	if (btrfs_header_level(eb) == 1 && eb != root->node) {
-		if (rand() % 5)
+		if (rand_range(5))
 			return;
 	}
 
@@ -302,6 +309,13 @@ static void btrfs_corrupt_extent_tree(struct btrfs_trans_handle *trans,
 enum btrfs_inode_field {
 	BTRFS_INODE_FIELD_ISIZE,
 	BTRFS_INODE_FIELD_NBYTES,
+	BTRFS_INODE_FIELD_NLINK,
+	BTRFS_INODE_FIELD_GENERATION,
+	BTRFS_INODE_FIELD_TRANSID,
+	BTRFS_INODE_FIELD_BLOCK_GROUP,
+	BTRFS_INODE_FIELD_MODE,
+	BTRFS_INODE_FIELD_UID,
+	BTRFS_INODE_FIELD_GID,
 	BTRFS_INODE_FIELD_BAD,
 };
 
@@ -340,6 +354,20 @@ static enum btrfs_inode_field convert_inode_field(char *field)
 		return BTRFS_INODE_FIELD_ISIZE;
 	if (!strncmp(field, "nbytes", FIELD_BUF_LEN))
 		return BTRFS_INODE_FIELD_NBYTES;
+	if (!strncmp(field, "nlink", FIELD_BUF_LEN))
+		return BTRFS_INODE_FIELD_NLINK;
+	if (!strncmp(field, "generation", FIELD_BUF_LEN))
+		return BTRFS_INODE_FIELD_GENERATION;
+	if (!strncmp(field, "transid", FIELD_BUF_LEN))
+		return BTRFS_INODE_FIELD_TRANSID;
+	if (!strncmp(field, "block_group", FIELD_BUF_LEN))
+		return BTRFS_INODE_FIELD_BLOCK_GROUP;
+	if (!strncmp(field, "mode", FIELD_BUF_LEN))
+		return BTRFS_INODE_FIELD_MODE;
+	if (!strncmp(field, "uid", FIELD_BUF_LEN))
+		return BTRFS_INODE_FIELD_UID;
+	if (!strncmp(field, "gid", FIELD_BUF_LEN))
+		return BTRFS_INODE_FIELD_GID;
 	return BTRFS_INODE_FIELD_BAD;
 }
 
@@ -391,7 +419,7 @@ static u64 generate_u64(u64 orig)
 {
 	u64 ret;
 	do {
-		ret = rand();
+		ret = rand_u64();
 	} while (ret == orig);
 	return ret;
 }
@@ -400,7 +428,7 @@ static u32 generate_u32(u32 orig)
 {
 	u32 ret;
 	do {
-		ret = rand();
+		ret = rand_u32();
 	} while (ret == orig);
 	return ret;
 }
@@ -409,7 +437,7 @@ static u8 generate_u8(u8 orig)
 {
 	u8 ret;
 	do {
-		ret = rand();
+		ret = rand_u8();
 	} while (ret == orig);
 	return ret;
 }
@@ -597,6 +625,41 @@ static int corrupt_inode(struct btrfs_trans_handle *trans,
 		bogus = generate_u64(orig);
 		btrfs_set_inode_nbytes(path->nodes[0], ei, bogus);
 		break;
+	case BTRFS_INODE_FIELD_NLINK:
+		orig = btrfs_inode_nlink(path->nodes[0], ei);
+		bogus = generate_u32(orig);
+		btrfs_set_inode_nlink(path->nodes[0], ei, bogus);
+		break;
+	case BTRFS_INODE_FIELD_GENERATION:
+		orig = btrfs_inode_generation(path->nodes[0], ei);
+		bogus = generate_u64(orig);
+		btrfs_set_inode_generation(path->nodes[0], ei, bogus);
+		break;
+	case BTRFS_INODE_FIELD_TRANSID:
+		orig = btrfs_inode_transid(path->nodes[0], ei);
+		bogus = generate_u64(orig);
+		btrfs_set_inode_transid(path->nodes[0], ei, bogus);
+		break;
+	case BTRFS_INODE_FIELD_BLOCK_GROUP:
+		orig = btrfs_inode_block_group(path->nodes[0], ei);
+		bogus = generate_u64(orig);
+		btrfs_set_inode_block_group(path->nodes[0], ei, bogus);
+		break;
+	case BTRFS_INODE_FIELD_MODE:
+		orig = btrfs_inode_mode(path->nodes[0], ei);
+		bogus = generate_u32(orig);
+		btrfs_set_inode_mode(path->nodes[0], ei, bogus);
+		break;
+	case BTRFS_INODE_FIELD_UID:
+		orig = btrfs_inode_uid(path->nodes[0], ei);
+		bogus = generate_u32(orig);
+		btrfs_set_inode_uid(path->nodes[0], ei, bogus);
+		break;
+	case BTRFS_INODE_FIELD_GID:
+		orig = btrfs_inode_gid(path->nodes[0], ei);
+		bogus = generate_u32(orig);
+		btrfs_set_inode_gid(path->nodes[0], ei, bogus);
+		break;
 	default:
 		ret = -EINVAL;
 		break;
@@ -893,7 +956,11 @@ static int corrupt_item_nocow(struct btrfs_trans_handle *trans,
 	if (slot == 0)
 		del = 0;
 	/* Only accept valid eb */
-	BUG_ON(!leaf->data || slot >= btrfs_header_nritems(leaf));
+	if (slot >= btrfs_header_nritems(leaf)) {
+		error("invalid eb: no data or slot out of range: %d >= %d",
+				slot, btrfs_header_nritems(leaf));
+		return -EINVAL;
+	}
 	btrfs_item_key_to_cpu(leaf, &key, slot);
 	if (del) {
 		fprintf(stdout, "Deleting key and data [%llu, %u, %llu].\n",
@@ -945,7 +1012,7 @@ static int corrupt_chunk_tree(struct btrfs_trans_handle *trans,
 	while (!btrfs_previous_item(root, path, 0, BTRFS_DEV_ITEM_KEY)) {
 		slot = path->slots[0];
 		leaf = path->nodes[0];
-		del = rand() % 3;
+		del = rand_range(3);
 		/* Never delete the first item to keep the leaf structure */
 		if (path->slots[0] == 0)
 			del = 0;
@@ -972,7 +1039,7 @@ static int corrupt_chunk_tree(struct btrfs_trans_handle *trans,
 	while (!btrfs_previous_item(root, path, 0, BTRFS_CHUNK_ITEM_KEY)) {
 		slot = path->slots[0];
 		leaf = path->nodes[0];
-		del = rand() % 3;
+		del = rand_range(3);
 		btrfs_item_key_to_cpu(leaf, &found_key, slot);
 		ret = corrupt_item_nocow(trans, root, path, del);
 		if (ret)
@@ -1018,7 +1085,6 @@ int main(int argc, char **argv)
 	struct cache_tree root_cache;
 	struct btrfs_key key;
 	struct btrfs_root *root;
-	struct extent_buffer *eb;
 	char *dev;
 	/* chunk offset can be 0,so change to (u64)-1 */
 	u64 logical = (u64)-1;
@@ -1041,7 +1107,6 @@ int main(int argc, char **argv)
 	char field[FIELD_BUF_LEN];
 
 	field[0] = '\0';
-	srand(128);
 	memset(&key, 0, sizeof(key));
 
 	while(1) {
@@ -1161,7 +1226,7 @@ int main(int argc, char **argv)
 		if (logical == (u64)-1)
 			print_usage(1);
 		trans = btrfs_start_transaction(root, 1);
-		ret = corrupt_extent (trans, root, logical, 0);
+		ret = corrupt_extent(trans, root, logical);
 		btrfs_commit_transaction(trans, root);
 		goto out_close;
 	}
@@ -1180,7 +1245,7 @@ int main(int argc, char **argv)
 
 		if (logical == (u64)-1)
 			print_usage(1);
-		del = rand() % 3;
+		del = rand_range(3);
 		path = btrfs_alloc_path();
 		if (!path) {
 			fprintf(stderr, "path allocation failed\n");
@@ -1296,8 +1361,20 @@ int main(int argc, char **argv)
 		if (corrupt_block_keys) {
 			corrupt_keys_in_block(root, logical);
 		} else {
-			eb = debug_corrupt_block(root, logical,
-						 root->sectorsize, copy);
+			struct extent_buffer *eb;
+
+			eb = btrfs_find_create_tree_block(root->fs_info,
+					logical, root->sectorsize);
+			if (!eb) {
+				error(
+		"not enough memory to allocate extent buffer for bytenr %llu",
+					(unsigned long long)logical);
+				ret = 1;
+				goto out_close;
+			}
+
+			debug_corrupt_block(eb, root, logical, root->sectorsize,
+					copy);
 			free_extent_buffer(eb);
 		}
 		logical += root->sectorsize;