return 0;
}
+__printf(5, 6)
+__cold
+static void chunk_err(const struct btrfs_fs_info *fs_info,
+ const struct extent_buffer *leaf,
+ const struct btrfs_chunk *chunk, u64 logical,
+ const char *fmt, ...)
+{
+ bool is_sb;
+ struct va_format vaf;
+ va_list args;
+ int i;
+ int slot = -1;
+
+ /* Only superblock eb is able to have such small offset */
+ is_sb = (leaf->start == BTRFS_SUPER_INFO_OFFSET);
+
+ if (!is_sb) {
+ /*
+ * Get the slot number by iterating through all slots, this
+ * would provide better readability.
+ */
+ for (i = 0; i < btrfs_header_nritems(leaf); i++) {
+ if (btrfs_item_ptr_offset(leaf, i) ==
+ (unsigned long)chunk) {
+ slot = i;
+ break;
+ }
+ }
+ }
+ va_start(args, fmt);
+ vaf.fmt = fmt;
+ vaf.va = &args;
+
+ if (is_sb)
+ btrfs_crit(fs_info,
+ "corrupt superblock syschunk array: chunk_start=%llu, %pV",
+ logical, &vaf);
+ else
+ btrfs_crit(fs_info,
+ "corrupt leaf: root=%llu block=%llu slot=%d chunk_start=%llu, %pV",
+ BTRFS_CHUNK_TREE_OBJECTID, leaf->start, slot,
+ logical, &vaf);
+ va_end(args);
+}
+
+/*
+ * The common chunk check which could also work on super block sys chunk array.
+ *
+ * Return -EUCLEAN if anything is corrupted.
+ * Return 0 if everything is OK.
+ */
+int btrfs_check_chunk_valid(struct btrfs_fs_info *fs_info,
+ struct extent_buffer *leaf,
+ struct btrfs_chunk *chunk, u64 logical)
+{
+ u64 length;
+ u64 stripe_len;
+ u16 num_stripes;
+ u16 sub_stripes;
+ u64 type;
+ u64 features;
+ bool mixed = false;
+
+ 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);
+
+ if (!num_stripes) {
+ chunk_err(fs_info, leaf, chunk, logical,
+ "invalid chunk num_stripes, have %u", num_stripes);
+ return -EUCLEAN;
+ }
+ if (!IS_ALIGNED(logical, fs_info->sectorsize)) {
+ chunk_err(fs_info, leaf, chunk, logical,
+ "invalid chunk logical, have %llu should aligned to %u",
+ logical, fs_info->sectorsize);
+ return -EUCLEAN;
+ }
+ if (btrfs_chunk_sector_size(leaf, chunk) != fs_info->sectorsize) {
+ chunk_err(fs_info, leaf, chunk, logical,
+ "invalid chunk sectorsize, have %u expect %u",
+ btrfs_chunk_sector_size(leaf, chunk),
+ fs_info->sectorsize);
+ return -EUCLEAN;
+ }
+ if (!length || !IS_ALIGNED(length, fs_info->sectorsize)) {
+ chunk_err(fs_info, leaf, chunk, logical,
+ "invalid chunk length, have %llu", length);
+ return -EUCLEAN;
+ }
+ if (!is_power_of_2(stripe_len) || stripe_len != BTRFS_STRIPE_LEN) {
+ chunk_err(fs_info, leaf, chunk, logical,
+ "invalid chunk stripe length: %llu",
+ stripe_len);
+ return -EUCLEAN;
+ }
+ if (~(BTRFS_BLOCK_GROUP_TYPE_MASK | BTRFS_BLOCK_GROUP_PROFILE_MASK) &
+ type) {
+ chunk_err(fs_info, leaf, chunk, logical,
+ "unrecognized chunk type: 0x%llx",
+ ~(BTRFS_BLOCK_GROUP_TYPE_MASK |
+ BTRFS_BLOCK_GROUP_PROFILE_MASK) &
+ btrfs_chunk_type(leaf, chunk));
+ return -EUCLEAN;
+ }
+
+ if ((type & BTRFS_BLOCK_GROUP_TYPE_MASK) == 0) {
+ chunk_err(fs_info, leaf, chunk, logical,
+ "missing chunk type flag, have 0x%llx one bit must be set in 0x%llx",
+ type, BTRFS_BLOCK_GROUP_TYPE_MASK);
+ return -EUCLEAN;
+ }
+
+ if ((type & BTRFS_BLOCK_GROUP_SYSTEM) &&
+ (type & (BTRFS_BLOCK_GROUP_METADATA | BTRFS_BLOCK_GROUP_DATA))) {
+ chunk_err(fs_info, leaf, chunk, logical,
+ "system chunk with data or metadata type: 0x%llx",
+ type);
+ return -EUCLEAN;
+ }
+
+ features = btrfs_super_incompat_flags(fs_info->super_copy);
+ if (features & BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS)
+ mixed = true;
+
+ if (!mixed) {
+ if ((type & BTRFS_BLOCK_GROUP_METADATA) &&
+ (type & BTRFS_BLOCK_GROUP_DATA)) {
+ chunk_err(fs_info, leaf, chunk, logical,
+ "mixed chunk type in non-mixed mode: 0x%llx", type);
+ return -EUCLEAN;
+ }
+ }
+
+ if ((type & BTRFS_BLOCK_GROUP_RAID10 && sub_stripes != 2) ||
+ (type & BTRFS_BLOCK_GROUP_RAID1 && num_stripes != 2) ||
+ (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)) {
+ chunk_err(fs_info, leaf, chunk, logical,
+ "invalid num_stripes:sub_stripes %u:%u for profile %llu",
+ num_stripes, sub_stripes,
+ type & BTRFS_BLOCK_GROUP_PROFILE_MASK);
+ return -EUCLEAN;
+ }
+
+ return 0;
+}
+
+__printf(4, 5)
+__cold
+static void dev_item_err(const struct btrfs_fs_info *fs_info,
+ const struct extent_buffer *eb, int slot,
+ const char *fmt, ...)
+{
+ struct btrfs_key key;
+ struct va_format vaf;
+ va_list args;
+
+ btrfs_item_key_to_cpu(eb, &key, slot);
+ va_start(args, fmt);
+
+ vaf.fmt = fmt;
+ vaf.va = &args;
+
+ btrfs_crit(fs_info,
+ "corrupt %s: root=%llu block=%llu slot=%d devid=%llu %pV",
+ btrfs_header_level(eb) == 0 ? "leaf" : "node",
+ btrfs_header_owner(eb), btrfs_header_bytenr(eb), slot,
+ key.objectid, &vaf);
+ va_end(args);
+}
+
+static int check_dev_item(struct btrfs_fs_info *fs_info,
+ struct extent_buffer *leaf,
+ struct btrfs_key *key, int slot)
+{
+ struct btrfs_dev_item *ditem;
+ u64 max_devid = max(BTRFS_MAX_DEVS(fs_info), BTRFS_MAX_DEVS_SYS_CHUNK);
+
+ if (key->objectid != BTRFS_DEV_ITEMS_OBJECTID) {
+ dev_item_err(fs_info, leaf, slot,
+ "invalid objectid: has=%llu expect=%llu",
+ key->objectid, BTRFS_DEV_ITEMS_OBJECTID);
+ return -EUCLEAN;
+ }
+ if (key->offset > max_devid) {
+ dev_item_err(fs_info, leaf, slot,
+ "invalid devid: has=%llu expect=[0, %llu]",
+ key->offset, max_devid);
+ return -EUCLEAN;
+ }
+ ditem = btrfs_item_ptr(leaf, slot, struct btrfs_dev_item);
+ if (btrfs_device_id(leaf, ditem) != key->offset) {
+ dev_item_err(fs_info, leaf, slot,
+ "devid mismatch: key has=%llu item has=%llu",
+ key->offset, btrfs_device_id(leaf, ditem));
+ return -EUCLEAN;
+ }
+
+ /*
+ * For device total_bytes, we don't have reliable way to check it, as
+ * it can be 0 for device removal. Device size check can only be done
+ * by dev extents check.
+ */
+ if (btrfs_device_bytes_used(leaf, ditem) >
+ btrfs_device_total_bytes(leaf, ditem)) {
+ dev_item_err(fs_info, leaf, slot,
+ "invalid bytes used: have %llu expect [0, %llu]",
+ btrfs_device_bytes_used(leaf, ditem),
+ btrfs_device_total_bytes(leaf, ditem));
+ return -EUCLEAN;
+ }
+ /*
+ * Remaining members like io_align/type/gen/dev_group aren't really
+ * utilized. Skip them to make later usage of them easier.
+ */
+ return 0;
+}
+
/*
* Common point to switch the item-specific validation.
*/
struct btrfs_key *key, int slot)
{
int ret = 0;
+ struct btrfs_chunk *chunk;
switch (key->type) {
case BTRFS_EXTENT_DATA_KEY:
case BTRFS_BLOCK_GROUP_ITEM_KEY:
ret = check_block_group_item(fs_info, leaf, key, slot);
break;
+ case BTRFS_CHUNK_ITEM_KEY:
+ chunk = btrfs_item_ptr(leaf, slot, struct btrfs_chunk);
+ ret = btrfs_check_chunk_valid(fs_info, leaf, chunk,
+ key->offset);
+ break;
+ case BTRFS_DEV_ITEM_KEY:
+ ret = check_dev_item(fs_info, leaf, key, slot);
+ break;
}
return ret;
}
git.samba.org / sfrench / cifs-2.6.git / blobdiff