}
/*
- * Slot is used to verfy the chunk item is valid
+ * slot == -1: SYSTEM chunk
+ * return -EIO on error, otherwise return 0
+ */
+static int btrfs_check_chunk_valid(struct btrfs_root *root,
+ struct extent_buffer *leaf,
+ struct btrfs_chunk *chunk,
+ int slot, u64 logical)
+{
+ u64 length;
+ u64 stripe_len;
+ u16 num_stripes;
+ u16 sub_stripes;
+ u64 type;
+
+ length = btrfs_chunk_length(leaf, chunk);
+ stripe_len = btrfs_chunk_stripe_len(leaf, chunk);
+ num_stripes = btrfs_chunk_num_stripes(leaf, chunk);
+ sub_stripes = btrfs_chunk_sub_stripes(leaf, chunk);
+ type = btrfs_chunk_type(leaf, chunk);
+
+ /*
+ * These valid checks may be insufficient to cover every corner cases.
+ */
+ if (!IS_ALIGNED(logical, root->sectorsize)) {
+ error("invalid chunk logical %llu", logical);
+ return -EIO;
+ }
+ if (btrfs_chunk_sector_size(leaf, chunk) != root->sectorsize) {
+ error("invalid chunk sectorsize %llu",
+ (unsigned long long)btrfs_chunk_sector_size(leaf, chunk));
+ return -EIO;
+ }
+ if (!length || !IS_ALIGNED(length, root->sectorsize)) {
+ error("invalid chunk length %llu", length);
+ return -EIO;
+ }
+ if (stripe_len != BTRFS_STRIPE_LEN) {
+ error("invalid chunk stripe length: %llu", stripe_len);
+ return -EIO;
+ }
+ /* Check on chunk item type */
+ if (slot == -1 && (type & BTRFS_BLOCK_GROUP_SYSTEM) == 0) {
+ error("invalid chunk type %llu", type);
+ return -EIO;
+ }
+ if (type & ~(BTRFS_BLOCK_GROUP_TYPE_MASK |
+ BTRFS_BLOCK_GROUP_PROFILE_MASK)) {
+ error("unrecognized chunk type: %llu",
+ ~(BTRFS_BLOCK_GROUP_TYPE_MASK |
+ BTRFS_BLOCK_GROUP_PROFILE_MASK) & type);
+ return -EIO;
+ }
+ /*
+ * Btrfs_chunk contains at least one stripe, and for sys_chunk
+ * it can't exceed the system chunk array size
+ * For normal chunk, it should match its chunk item size.
+ */
+ if (num_stripes < 1 ||
+ (slot == -1 && sizeof(struct btrfs_stripe) * num_stripes >
+ BTRFS_SYSTEM_CHUNK_ARRAY_SIZE) ||
+ (slot >= 0 && sizeof(struct btrfs_stripe) * (num_stripes - 1) >
+ btrfs_item_size_nr(leaf, slot))) {
+ error("invalid num_stripes: %u", num_stripes);
+ return -EIO;
+ }
+ /*
+ * Device number check against profile
+ */
+ if ((type & BTRFS_BLOCK_GROUP_RAID10 && sub_stripes == 0) ||
+ (type & BTRFS_BLOCK_GROUP_RAID1 && num_stripes < 1) ||
+ (type & BTRFS_BLOCK_GROUP_RAID5 && num_stripes < 2) ||
+ (type & BTRFS_BLOCK_GROUP_RAID6 && num_stripes < 3) ||
+ (type & BTRFS_BLOCK_GROUP_DUP && num_stripes > 2) ||
+ ((type & BTRFS_BLOCK_GROUP_PROFILE_MASK) == 0 &&
+ num_stripes != 1)) {
+ error("Invalid num_stripes:sub_stripes %u:%u for profile %llu",
+ num_stripes, sub_stripes,
+ type & BTRFS_BLOCK_GROUP_PROFILE_MASK);
+ return -EIO;
+ }
+
+ return 0;
+}
+
+/*
+ * Slot is used to verify the chunk item is valid
*
* For sys chunk in superblock, pass -1 to indicate sys chunk.
*/
struct cache_extent *ce;
u64 logical;
u64 length;
- u64 stripe_len;
u64 devid;
u8 uuid[BTRFS_UUID_SIZE];
int num_stripes;
logical = key->offset;
length = btrfs_chunk_length(leaf, chunk);
- stripe_len = btrfs_chunk_stripe_len(leaf, chunk);
num_stripes = btrfs_chunk_num_stripes(leaf, chunk);
/* Validation check */
- if (!num_stripes) {
- error("invalid chunk num_stripes: %u", num_stripes);
- return -EIO;
- }
- if (!IS_ALIGNED(logical, root->sectorsize)) {
- error("invalid chunk logical %llu", logical);
- return -EIO;
- }
- if (!length || !IS_ALIGNED(length, root->sectorsize)) {
- error("invalid chunk length %llu", length);
- return -EIO;
- }
- if (!is_power_of_2(stripe_len)) {
- error("invalid chunk stripe length: %llu", stripe_len);
- return -EIO;
- }
- if (~(BTRFS_BLOCK_GROUP_TYPE_MASK | BTRFS_BLOCK_GROUP_PROFILE_MASK) &
- btrfs_chunk_type(leaf, chunk)) {
- error("unrecognized chunk type: %llu",
- ~(BTRFS_BLOCK_GROUP_TYPE_MASK |
- BTRFS_BLOCK_GROUP_PROFILE_MASK) &
- btrfs_chunk_type(leaf, chunk));
- return -EIO;
+ ret = btrfs_check_chunk_valid(root, leaf, chunk, slot, logical);
+ if (ret) {
+ error("%s checksums match, but it has an invalid chunk, %s",
+ (slot == -1) ? "Superblock" : "Metadata",
+ (slot == -1) ? "try btrfsck --repair -s <superblock> ie, 0,1,2" : "");
+ return ret;
}
ce = search_cache_extent(&map_tree->cache_tree, logical);
map->type = btrfs_chunk_type(leaf, chunk);
map->sub_stripes = btrfs_chunk_sub_stripes(leaf, chunk);
- /* Check on chunk item type */
- if (map->type & ~(BTRFS_BLOCK_GROUP_TYPE_MASK |
- BTRFS_BLOCK_GROUP_PROFILE_MASK)) {
- fprintf(stderr, "Unknown chunk type bits: %llu\n",
- map->type & ~(BTRFS_BLOCK_GROUP_TYPE_MASK |
- BTRFS_BLOCK_GROUP_PROFILE_MASK));
- ret = -EIO;
- goto out;
- }
-
- /*
- * Btrfs_chunk contains at least one stripe, and for sys_chunk
- * it can't exceed the system chunk array size
- * For normal chunk, it should match its chunk item size.
- */
- if (num_stripes < 1 ||
- (slot == -1 && sizeof(struct btrfs_stripe) * num_stripes >
- BTRFS_SYSTEM_CHUNK_ARRAY_SIZE) ||
- (slot >= 0 && sizeof(struct btrfs_stripe) * (num_stripes - 1) >
- btrfs_item_size_nr(leaf, slot))) {
- fprintf(stderr, "Invalid num_stripes: %u\n",
- num_stripes);
- ret = -EIO;
- goto out;
- }
-
- /*
- * Device number check against profile
- */
- if ((map->type & BTRFS_BLOCK_GROUP_RAID10 && map->sub_stripes == 0) ||
- (map->type & BTRFS_BLOCK_GROUP_RAID1 && num_stripes < 1) ||
- (map->type & BTRFS_BLOCK_GROUP_RAID5 && num_stripes < 2) ||
- (map->type & BTRFS_BLOCK_GROUP_RAID6 && num_stripes < 3) ||
- (map->type & BTRFS_BLOCK_GROUP_DUP && num_stripes > 2) ||
- ((map->type & BTRFS_BLOCK_GROUP_PROFILE_MASK) == 0 &&
- num_stripes != 1)) {
- fprintf(stderr,
- "Invalid num_stripes:sub_stripes %u:%u for profile %llu\n",
- num_stripes, map->sub_stripes,
- map->type & BTRFS_BLOCK_GROUP_PROFILE_MASK);
- ret = -EIO;
- goto out;
- }
-
for (i = 0; i < num_stripes; i++) {
map->stripes[i].physical =
btrfs_stripe_offset_nr(leaf, chunk, i);
BUG_ON(ret);
return 0;
-out:
- free(map);
- return ret;
}
static int fill_device_from_item(struct extent_buffer *leaf,
device = btrfs_find_device(root, devid, dev_uuid, fs_uuid);
if (!device) {
- printk("warning devid %llu not found already\n",
- (unsigned long long)devid);
device = kzalloc(sizeof(*device), GFP_NOFS);
if (!device)
return -ENOMEM;
projects / platform / upstream / btrfs-progs.git / blobdiff