+ }
+
+ err = merge_root_recs(root, &root_node.root_cache, root_cache);
+ if (err < 0)
+ ret = err;
+
+ if (root_node.current) {
+ root_node.current->checked = 1;
+ maybe_free_inode_rec(&root_node.inode_cache,
+ root_node.current);
+ }
+
+ err = check_inode_recs(root, &root_node.inode_cache);
+ if (!ret)
+ ret = err;
+
+ free_corrupt_blocks_tree(&corrupt_blocks);
+ root->fs_info->corrupt_blocks = NULL;
+ free_orphan_data_extents(&root->orphan_data_extents);
+ return ret;
+}
+
+static int fs_root_objectid(u64 objectid)
+{
+ if (objectid == BTRFS_TREE_RELOC_OBJECTID ||
+ objectid == BTRFS_DATA_RELOC_TREE_OBJECTID)
+ return 1;
+ return is_fstree(objectid);
+}
+
+static int check_fs_roots(struct btrfs_root *root,
+ struct cache_tree *root_cache)
+{
+ struct btrfs_path path;
+ struct btrfs_key key;
+ struct walk_control wc;
+ struct extent_buffer *leaf, *tree_node;
+ struct btrfs_root *tmp_root;
+ struct btrfs_root *tree_root = root->fs_info->tree_root;
+ int ret;
+ int err = 0;
+
+ if (ctx.progress_enabled) {
+ ctx.tp = TASK_FS_ROOTS;
+ task_start(ctx.info);
+ }
+
+ /*
+ * Just in case we made any changes to the extent tree that weren't
+ * reflected into the free space cache yet.
+ */
+ if (repair)
+ reset_cached_block_groups(root->fs_info);
+ memset(&wc, 0, sizeof(wc));
+ cache_tree_init(&wc.shared);
+ btrfs_init_path(&path);
+
+again:
+ key.offset = 0;
+ key.objectid = 0;
+ key.type = BTRFS_ROOT_ITEM_KEY;
+ ret = btrfs_search_slot(NULL, tree_root, &key, &path, 0, 0);
+ if (ret < 0) {
+ err = 1;
+ goto out;
+ }
+ tree_node = tree_root->node;
+ while (1) {
+ if (tree_node != tree_root->node) {
+ free_root_recs_tree(root_cache);
+ btrfs_release_path(&path);
+ goto again;
+ }
+ leaf = path.nodes[0];
+ if (path.slots[0] >= btrfs_header_nritems(leaf)) {
+ ret = btrfs_next_leaf(tree_root, &path);
+ if (ret) {
+ if (ret < 0)
+ err = 1;
+ break;
+ }
+ leaf = path.nodes[0];
+ }
+ btrfs_item_key_to_cpu(leaf, &key, path.slots[0]);
+ if (key.type == BTRFS_ROOT_ITEM_KEY &&
+ fs_root_objectid(key.objectid)) {
+ if (key.objectid == BTRFS_TREE_RELOC_OBJECTID) {
+ tmp_root = btrfs_read_fs_root_no_cache(
+ root->fs_info, &key);
+ } else {
+ key.offset = (u64)-1;
+ tmp_root = btrfs_read_fs_root(
+ root->fs_info, &key);
+ }
+ if (IS_ERR(tmp_root)) {
+ err = 1;
+ goto next;
+ }
+ ret = check_fs_root(tmp_root, root_cache, &wc);
+ if (ret == -EAGAIN) {
+ free_root_recs_tree(root_cache);
+ btrfs_release_path(&path);
+ goto again;
+ }
+ if (ret)
+ err = 1;
+ if (key.objectid == BTRFS_TREE_RELOC_OBJECTID)
+ btrfs_free_fs_root(tmp_root);
+ } else if (key.type == BTRFS_ROOT_REF_KEY ||
+ key.type == BTRFS_ROOT_BACKREF_KEY) {
+ process_root_ref(leaf, path.slots[0], &key,
+ root_cache);
+ }
+next:
+ path.slots[0]++;
+ }
+out:
+ btrfs_release_path(&path);
+ if (err)
+ free_extent_cache_tree(&wc.shared);
+ if (!cache_tree_empty(&wc.shared))
+ fprintf(stderr, "warning line %d\n", __LINE__);
+
+ task_stop(ctx.info);
+
+ return err;
+}
+
+#define ROOT_DIR_ERROR (1<<1) /* bad ROOT_DIR */
+#define DIR_ITEM_MISSING (1<<2) /* DIR_ITEM not found */
+#define DIR_ITEM_MISMATCH (1<<3) /* DIR_ITEM found but not match */
+#define INODE_REF_MISSING (1<<4) /* INODE_REF/INODE_EXTREF not found */
+#define INODE_ITEM_MISSING (1<<5) /* INODE_ITEM not found */
+#define INODE_ITEM_MISMATCH (1<<6) /* INODE_ITEM found but not match */
+#define FILE_EXTENT_ERROR (1<<7) /* bad FILE_EXTENT */
+#define ODD_CSUM_ITEM (1<<8) /* CSUM_ITEM error */
+#define CSUM_ITEM_MISSING (1<<9) /* CSUM_ITEM not found */
+#define LINK_COUNT_ERROR (1<<10) /* INODE_ITEM nlink count error */
+#define NBYTES_ERROR (1<<11) /* INODE_ITEM nbytes count error */
+#define ISIZE_ERROR (1<<12) /* INODE_ITEM size count error */
+#define ORPHAN_ITEM (1<<13) /* INODE_ITEM no reference */
+#define NO_INODE_ITEM (1<<14) /* no inode_item */
+#define LAST_ITEM (1<<15) /* Complete this tree traversal */
+#define ROOT_REF_MISSING (1<<16) /* ROOT_REF not found */
+#define ROOT_REF_MISMATCH (1<<17) /* ROOT_REF found but not match */
+
+/*
+ * Find DIR_ITEM/DIR_INDEX for the given key and check it with the specified
+ * INODE_REF/INODE_EXTREF match.
+ *
+ * @root: the root of the fs/file tree
+ * @ref_key: the key of the INODE_REF/INODE_EXTREF
+ * @key: the key of the DIR_ITEM/DIR_INDEX
+ * @index: the index in the INODE_REF/INODE_EXTREF, be used to
+ * distinguish root_dir between normal dir/file
+ * @name: the name in the INODE_REF/INODE_EXTREF
+ * @namelen: the length of name in the INODE_REF/INODE_EXTREF
+ * @mode: the st_mode of INODE_ITEM
+ *
+ * Return 0 if no error occurred.
+ * Return ROOT_DIR_ERROR if found DIR_ITEM/DIR_INDEX for root_dir.
+ * Return DIR_ITEM_MISSING if couldn't find DIR_ITEM/DIR_INDEX for normal
+ * dir/file.
+ * Return DIR_ITEM_MISMATCH if INODE_REF/INODE_EXTREF and DIR_ITEM/DIR_INDEX
+ * not match for normal dir/file.
+ */
+static int find_dir_item(struct btrfs_root *root, struct btrfs_key *ref_key,
+ struct btrfs_key *key, u64 index, char *name,
+ u32 namelen, u32 mode)
+{
+ struct btrfs_path path;
+ struct extent_buffer *node;
+ struct btrfs_dir_item *di;
+ struct btrfs_key location;
+ char namebuf[BTRFS_NAME_LEN] = {0};
+ u32 total;
+ u32 cur = 0;
+ u32 len;
+ u32 name_len;
+ u32 data_len;
+ u8 filetype;
+ int slot;
+ int ret;
+
+ btrfs_init_path(&path);
+ ret = btrfs_search_slot(NULL, root, key, &path, 0, 0);
+ if (ret < 0) {
+ ret = DIR_ITEM_MISSING;
+ goto out;
+ }
+
+ /* Process root dir and goto out*/
+ if (index == 0) {
+ if (ret == 0) {
+ ret = ROOT_DIR_ERROR;
+ error(
+ "root %llu INODE %s[%llu %llu] ROOT_DIR shouldn't have %s",
+ root->objectid,
+ ref_key->type == BTRFS_INODE_REF_KEY ?
+ "REF" : "EXTREF",
+ ref_key->objectid, ref_key->offset,
+ key->type == BTRFS_DIR_ITEM_KEY ?
+ "DIR_ITEM" : "DIR_INDEX");
+ } else {
+ ret = 0;
+ }
+
+ goto out;
+ }
+
+ /* Process normal file/dir */
+ if (ret > 0) {
+ ret = DIR_ITEM_MISSING;
+ error(
+ "root %llu INODE %s[%llu %llu] doesn't have related %s[%llu %llu] namelen %u filename %s filetype %d",
+ root->objectid,
+ ref_key->type == BTRFS_INODE_REF_KEY ? "REF" : "EXTREF",
+ ref_key->objectid, ref_key->offset,
+ key->type == BTRFS_DIR_ITEM_KEY ?
+ "DIR_ITEM" : "DIR_INDEX",
+ key->objectid, key->offset, namelen, name,
+ imode_to_type(mode));
+ goto out;
+ }
+
+ /* Check whether inode_id/filetype/name match */
+ node = path.nodes[0];
+ slot = path.slots[0];
+ di = btrfs_item_ptr(node, slot, struct btrfs_dir_item);
+ total = btrfs_item_size_nr(node, slot);
+ while (cur < total) {
+ ret = DIR_ITEM_MISMATCH;
+ name_len = btrfs_dir_name_len(node, di);
+ data_len = btrfs_dir_data_len(node, di);
+
+ btrfs_dir_item_key_to_cpu(node, di, &location);
+ if (location.objectid != ref_key->objectid ||
+ location.type != BTRFS_INODE_ITEM_KEY ||
+ location.offset != 0)
+ goto next;
+
+ filetype = btrfs_dir_type(node, di);
+ if (imode_to_type(mode) != filetype)
+ goto next;
+
+ if (name_len <= BTRFS_NAME_LEN) {
+ len = name_len;
+ } else {
+ len = BTRFS_NAME_LEN;
+ warning("root %llu %s[%llu %llu] name too long %u, trimmed",
+ root->objectid,
+ key->type == BTRFS_DIR_ITEM_KEY ?
+ "DIR_ITEM" : "DIR_INDEX",
+ key->objectid, key->offset, name_len);
+ }
+ read_extent_buffer(node, namebuf, (unsigned long)(di + 1), len);
+ if (len != namelen || strncmp(namebuf, name, len))
+ goto next;
+
+ ret = 0;
+ goto out;
+next:
+ len = sizeof(*di) + name_len + data_len;
+ di = (struct btrfs_dir_item *)((char *)di + len);
+ cur += len;
+ }
+ if (ret == DIR_ITEM_MISMATCH)
+ error(
+ "root %llu INODE %s[%llu %llu] and %s[%llu %llu] mismatch namelen %u filename %s filetype %d",
+ root->objectid,
+ ref_key->type == BTRFS_INODE_REF_KEY ? "REF" : "EXTREF",
+ ref_key->objectid, ref_key->offset,
+ key->type == BTRFS_DIR_ITEM_KEY ?
+ "DIR_ITEM" : "DIR_INDEX",
+ key->objectid, key->offset, namelen, name,
+ imode_to_type(mode));
+out:
+ btrfs_release_path(&path);
+ return ret;
+}
+
+/*
+ * Traverse the given INODE_REF and call find_dir_item() to find related
+ * DIR_ITEM/DIR_INDEX.
+ *
+ * @root: the root of the fs/file tree
+ * @ref_key: the key of the INODE_REF
+ * @refs: the count of INODE_REF
+ * @mode: the st_mode of INODE_ITEM
+ *
+ * Return 0 if no error occurred.
+ */
+static int check_inode_ref(struct btrfs_root *root, struct btrfs_key *ref_key,
+ struct extent_buffer *node, int slot, u64 *refs,
+ int mode)
+{
+ struct btrfs_key key;
+ struct btrfs_inode_ref *ref;
+ char namebuf[BTRFS_NAME_LEN] = {0};
+ u32 total;
+ u32 cur = 0;
+ u32 len;
+ u32 name_len;
+ u64 index;
+ int ret, err = 0;
+
+ ref = btrfs_item_ptr(node, slot, struct btrfs_inode_ref);
+ total = btrfs_item_size_nr(node, slot);
+
+next:
+ /* Update inode ref count */
+ (*refs)++;
+
+ index = btrfs_inode_ref_index(node, ref);
+ name_len = btrfs_inode_ref_name_len(node, ref);
+ if (name_len <= BTRFS_NAME_LEN) {
+ len = name_len;
+ } else {
+ len = BTRFS_NAME_LEN;
+ warning("root %llu INODE_REF[%llu %llu] name too long",
+ root->objectid, ref_key->objectid, ref_key->offset);
+ }
+
+ read_extent_buffer(node, namebuf, (unsigned long)(ref + 1), len);
+
+ /* Check root dir ref name */
+ if (index == 0 && strncmp(namebuf, "..", name_len)) {
+ error("root %llu INODE_REF[%llu %llu] ROOT_DIR name shouldn't be %s",
+ root->objectid, ref_key->objectid, ref_key->offset,
+ namebuf);
+ err |= ROOT_DIR_ERROR;
+ }
+
+ /* Find related DIR_INDEX */
+ key.objectid = ref_key->offset;
+ key.type = BTRFS_DIR_INDEX_KEY;
+ key.offset = index;
+ ret = find_dir_item(root, ref_key, &key, index, namebuf, len, mode);
+ err |= ret;
+
+ /* Find related dir_item */
+ key.objectid = ref_key->offset;
+ key.type = BTRFS_DIR_ITEM_KEY;
+ key.offset = btrfs_name_hash(namebuf, len);
+ ret = find_dir_item(root, ref_key, &key, index, namebuf, len, mode);
+ err |= ret;
+
+ len = sizeof(*ref) + name_len;
+ ref = (struct btrfs_inode_ref *)((char *)ref + len);
+ cur += len;
+ if (cur < total)
+ goto next;
+
+ return err;
+}
+
+/*
+ * Traverse the given INODE_EXTREF and call find_dir_item() to find related
+ * DIR_ITEM/DIR_INDEX.
+ *
+ * @root: the root of the fs/file tree
+ * @ref_key: the key of the INODE_EXTREF
+ * @refs: the count of INODE_EXTREF
+ * @mode: the st_mode of INODE_ITEM
+ *
+ * Return 0 if no error occurred.
+ */
+static int check_inode_extref(struct btrfs_root *root,
+ struct btrfs_key *ref_key,
+ struct extent_buffer *node, int slot, u64 *refs,
+ int mode)
+{
+ struct btrfs_key key;
+ struct btrfs_inode_extref *extref;
+ char namebuf[BTRFS_NAME_LEN] = {0};
+ u32 total;
+ u32 cur = 0;
+ u32 len;
+ u32 name_len;
+ u64 index;
+ u64 parent;
+ int ret;
+ int err = 0;
+
+ extref = btrfs_item_ptr(node, slot, struct btrfs_inode_extref);
+ total = btrfs_item_size_nr(node, slot);
+
+next:
+ /* update inode ref count */
+ (*refs)++;
+ name_len = btrfs_inode_extref_name_len(node, extref);
+ index = btrfs_inode_extref_index(node, extref);
+ parent = btrfs_inode_extref_parent(node, extref);
+ if (name_len <= BTRFS_NAME_LEN) {
+ len = name_len;
+ } else {
+ len = BTRFS_NAME_LEN;
+ warning("root %llu INODE_EXTREF[%llu %llu] name too long",
+ root->objectid, ref_key->objectid, ref_key->offset);
+ }
+ read_extent_buffer(node, namebuf, (unsigned long)(extref + 1), len);
+
+ /* Check root dir ref name */
+ if (index == 0 && strncmp(namebuf, "..", name_len)) {
+ error("root %llu INODE_EXTREF[%llu %llu] ROOT_DIR name shouldn't be %s",
+ root->objectid, ref_key->objectid, ref_key->offset,
+ namebuf);
+ err |= ROOT_DIR_ERROR;
+ }
+
+ /* find related dir_index */
+ key.objectid = parent;
+ key.type = BTRFS_DIR_INDEX_KEY;
+ key.offset = index;
+ ret = find_dir_item(root, ref_key, &key, index, namebuf, len, mode);
+ err |= ret;
+
+ /* find related dir_item */
+ key.objectid = parent;
+ key.type = BTRFS_DIR_ITEM_KEY;
+ key.offset = btrfs_name_hash(namebuf, len);
+ ret = find_dir_item(root, ref_key, &key, index, namebuf, len, mode);
+ err |= ret;
+
+ len = sizeof(*extref) + name_len;
+ extref = (struct btrfs_inode_extref *)((char *)extref + len);
+ cur += len;
+
+ if (cur < total)
+ goto next;
+
+ return err;
+}
+
+/*
+ * Find INODE_REF/INODE_EXTREF for the given key and check it with the specified
+ * DIR_ITEM/DIR_INDEX match.
+ *
+ * @root: the root of the fs/file tree
+ * @key: the key of the INODE_REF/INODE_EXTREF
+ * @name: the name in the INODE_REF/INODE_EXTREF
+ * @namelen: the length of name in the INODE_REF/INODE_EXTREF
+ * @index: the index in the INODE_REF/INODE_EXTREF, for DIR_ITEM set index
+ * to (u64)-1
+ * @ext_ref: the EXTENDED_IREF feature
+ *
+ * Return 0 if no error occurred.
+ * Return >0 for error bitmap
+ */
+static int find_inode_ref(struct btrfs_root *root, struct btrfs_key *key,
+ char *name, int namelen, u64 index,
+ unsigned int ext_ref)
+{
+ struct btrfs_path path;
+ struct btrfs_inode_ref *ref;
+ struct btrfs_inode_extref *extref;
+ struct extent_buffer *node;
+ char ref_namebuf[BTRFS_NAME_LEN] = {0};
+ u32 total;
+ u32 cur = 0;
+ u32 len;
+ u32 ref_namelen;
+ u64 ref_index;
+ u64 parent;
+ u64 dir_id;
+ int slot;
+ int ret;
+
+ btrfs_init_path(&path);
+ ret = btrfs_search_slot(NULL, root, key, &path, 0, 0);
+ if (ret) {
+ ret = INODE_REF_MISSING;
+ goto extref;
+ }
+
+ node = path.nodes[0];
+ slot = path.slots[0];
+
+ ref = btrfs_item_ptr(node, slot, struct btrfs_inode_ref);
+ total = btrfs_item_size_nr(node, slot);
+
+ /* Iterate all entry of INODE_REF */
+ while (cur < total) {
+ ret = INODE_REF_MISSING;
+
+ ref_namelen = btrfs_inode_ref_name_len(node, ref);
+ ref_index = btrfs_inode_ref_index(node, ref);
+ if (index != (u64)-1 && index != ref_index)
+ goto next_ref;
+
+ if (ref_namelen <= BTRFS_NAME_LEN) {
+ len = ref_namelen;
+ } else {
+ len = BTRFS_NAME_LEN;
+ warning("root %llu INODE %s[%llu %llu] name too long",
+ root->objectid,
+ key->type == BTRFS_INODE_REF_KEY ?
+ "REF" : "EXTREF",
+ key->objectid, key->offset);
+ }
+ read_extent_buffer(node, ref_namebuf, (unsigned long)(ref + 1),
+ len);
+
+ if (len != namelen || strncmp(ref_namebuf, name, len))
+ goto next_ref;
+
+ ret = 0;
+ goto out;
+next_ref:
+ len = sizeof(*ref) + ref_namelen;
+ ref = (struct btrfs_inode_ref *)((char *)ref + len);
+ cur += len;
+ }
+
+extref:
+ /* Skip if not support EXTENDED_IREF feature */
+ if (!ext_ref)
+ goto out;
+
+ btrfs_release_path(&path);
+ btrfs_init_path(&path);
+
+ dir_id = key->offset;
+ key->type = BTRFS_INODE_EXTREF_KEY;
+ key->offset = btrfs_extref_hash(dir_id, name, namelen);
+
+ ret = btrfs_search_slot(NULL, root, key, &path, 0, 0);
+ if (ret) {
+ ret = INODE_REF_MISSING;
+ goto out;
+ }
+
+ node = path.nodes[0];
+ slot = path.slots[0];
+
+ extref = btrfs_item_ptr(node, slot, struct btrfs_inode_extref);
+ cur = 0;
+ total = btrfs_item_size_nr(node, slot);
+
+ /* Iterate all entry of INODE_EXTREF */
+ while (cur < total) {
+ ret = INODE_REF_MISSING;
+
+ ref_namelen = btrfs_inode_extref_name_len(node, extref);
+ ref_index = btrfs_inode_extref_index(node, extref);
+ parent = btrfs_inode_extref_parent(node, extref);
+ if (index != (u64)-1 && index != ref_index)
+ goto next_extref;
+
+ if (parent != dir_id)
+ goto next_extref;
+
+ if (ref_namelen <= BTRFS_NAME_LEN) {
+ len = ref_namelen;
+ } else {
+ len = BTRFS_NAME_LEN;
+ warning("Warning: root %llu INODE %s[%llu %llu] name too long\n",
+ root->objectid,
+ key->type == BTRFS_INODE_REF_KEY ?
+ "REF" : "EXTREF",
+ key->objectid, key->offset);
+ }
+ read_extent_buffer(node, ref_namebuf,
+ (unsigned long)(extref + 1), len);
+
+ if (len != namelen || strncmp(ref_namebuf, name, len))
+ goto next_extref;
+
+ ret = 0;
+ goto out;
+
+next_extref:
+ len = sizeof(*extref) + ref_namelen;
+ extref = (struct btrfs_inode_extref *)((char *)extref + len);
+ cur += len;
+
+ }
+out:
+ btrfs_release_path(&path);
+ return ret;
+}
+
+/*
+ * Traverse the given DIR_ITEM/DIR_INDEX and check related INODE_ITEM and
+ * call find_inode_ref() to check related INODE_REF/INODE_EXTREF.
+ *
+ * @root: the root of the fs/file tree
+ * @key: the key of the INODE_REF/INODE_EXTREF
+ * @size: the st_size of the INODE_ITEM
+ * @ext_ref: the EXTENDED_IREF feature
+ *
+ * Return 0 if no error occurred.
+ */
+static int check_dir_item(struct btrfs_root *root, struct btrfs_key *key,
+ struct extent_buffer *node, int slot, u64 *size,
+ unsigned int ext_ref)
+{
+ struct btrfs_dir_item *di;
+ struct btrfs_inode_item *ii;
+ struct btrfs_path path;
+ struct btrfs_key location;
+ char namebuf[BTRFS_NAME_LEN] = {0};
+ u32 total;
+ u32 cur = 0;
+ u32 len;
+ u32 name_len;
+ u32 data_len;
+ u8 filetype;
+ u32 mode;
+ u64 index;
+ int ret;
+ int err = 0;
+
+ /*
+ * For DIR_ITEM set index to (u64)-1, so that find_inode_ref
+ * ignore index check.
+ */
+ index = (key->type == BTRFS_DIR_INDEX_KEY) ? key->offset : (u64)-1;
+
+ di = btrfs_item_ptr(node, slot, struct btrfs_dir_item);
+ total = btrfs_item_size_nr(node, slot);
+
+ while (cur < total) {
+ data_len = btrfs_dir_data_len(node, di);
+ if (data_len)
+ error("root %llu %s[%llu %llu] data_len shouldn't be %u",
+ root->objectid, key->type == BTRFS_DIR_ITEM_KEY ?
+ "DIR_ITEM" : "DIR_INDEX",
+ key->objectid, key->offset, data_len);
+
+ name_len = btrfs_dir_name_len(node, di);
+ if (name_len <= BTRFS_NAME_LEN) {
+ len = name_len;
+ } else {
+ len = BTRFS_NAME_LEN;
+ warning("root %llu %s[%llu %llu] name too long",
+ root->objectid,
+ key->type == BTRFS_DIR_ITEM_KEY ?
+ "DIR_ITEM" : "DIR_INDEX",
+ key->objectid, key->offset);
+ }
+ (*size) += name_len;
+
+ read_extent_buffer(node, namebuf, (unsigned long)(di + 1), len);
+ filetype = btrfs_dir_type(node, di);
+
+ btrfs_init_path(&path);
+ btrfs_dir_item_key_to_cpu(node, di, &location);
+
+ /* Ignore related ROOT_ITEM check */
+ if (location.type == BTRFS_ROOT_ITEM_KEY)
+ goto next;
+
+ /* Check relative INODE_ITEM(existence/filetype) */
+ ret = btrfs_search_slot(NULL, root, &location, &path, 0, 0);
+ if (ret) {
+ err |= INODE_ITEM_MISSING;
+ error("root %llu %s[%llu %llu] couldn't find relative INODE_ITEM[%llu] namelen %u filename %s filetype %x",
+ root->objectid, key->type == BTRFS_DIR_ITEM_KEY ?
+ "DIR_ITEM" : "DIR_INDEX", key->objectid,
+ key->offset, location.objectid, name_len,
+ namebuf, filetype);
+ goto next;
+ }
+
+ ii = btrfs_item_ptr(path.nodes[0], path.slots[0],
+ struct btrfs_inode_item);
+ mode = btrfs_inode_mode(path.nodes[0], ii);
+
+ if (imode_to_type(mode) != filetype) {
+ err |= INODE_ITEM_MISMATCH;
+ error("root %llu %s[%llu %llu] relative INODE_ITEM filetype mismatch namelen %u filename %s filetype %d",
+ root->objectid, key->type == BTRFS_DIR_ITEM_KEY ?
+ "DIR_ITEM" : "DIR_INDEX", key->objectid,
+ key->offset, name_len, namebuf, filetype);
+ }
+
+ /* Check relative INODE_REF/INODE_EXTREF */
+ location.type = BTRFS_INODE_REF_KEY;
+ location.offset = key->objectid;
+ ret = find_inode_ref(root, &location, namebuf, len,
+ index, ext_ref);
+ err |= ret;
+ if (ret & INODE_REF_MISSING)
+ error("root %llu %s[%llu %llu] relative INODE_REF missing namelen %u filename %s filetype %d",
+ root->objectid, key->type == BTRFS_DIR_ITEM_KEY ?
+ "DIR_ITEM" : "DIR_INDEX", key->objectid,
+ key->offset, name_len, namebuf, filetype);
+
+next:
+ btrfs_release_path(&path);
+ len = sizeof(*di) + name_len + data_len;
+ di = (struct btrfs_dir_item *)((char *)di + len);
+ cur += len;
+
+ if (key->type == BTRFS_DIR_INDEX_KEY && cur < total) {
+ error("root %llu DIR_INDEX[%llu %llu] should contain only one entry",
+ root->objectid, key->objectid, key->offset);
+ break;
+ }
+ }
+
+ return err;
+}
+
+/*
+ * Check file extent datasum/hole, update the size of the file extents,
+ * check and update the last offset of the file extent.
+ *
+ * @root: the root of fs/file tree.
+ * @fkey: the key of the file extent.
+ * @nodatasum: INODE_NODATASUM feature.
+ * @size: the sum of all EXTENT_DATA items size for this inode.
+ * @end: the offset of the last extent.
+ *
+ * Return 0 if no error occurred.
+ */
+static int check_file_extent(struct btrfs_root *root, struct btrfs_key *fkey,
+ struct extent_buffer *node, int slot,
+ unsigned int nodatasum, u64 *size, u64 *end)
+{
+ struct btrfs_file_extent_item *fi;
+ u64 disk_bytenr;
+ u64 disk_num_bytes;
+ u64 extent_num_bytes;
+ u64 found;
+ unsigned int extent_type;
+ unsigned int is_hole;
+ int ret;
+ int err = 0;
+
+ fi = btrfs_item_ptr(node, slot, struct btrfs_file_extent_item);
+
+ extent_type = btrfs_file_extent_type(node, fi);
+ /* Skip if file extent is inline */
+ if (extent_type == BTRFS_FILE_EXTENT_INLINE) {
+ struct btrfs_item *e = btrfs_item_nr(slot);
+ u32 item_inline_len;
+
+ item_inline_len = btrfs_file_extent_inline_item_len(node, e);
+ extent_num_bytes = btrfs_file_extent_inline_len(node, slot, fi);
+ if (extent_num_bytes == 0 ||
+ extent_num_bytes != item_inline_len)
+ err |= FILE_EXTENT_ERROR;
+ *size += extent_num_bytes;
+ return err;
+ }
+
+ /* Check extent type */
+ if (extent_type != BTRFS_FILE_EXTENT_REG &&
+ extent_type != BTRFS_FILE_EXTENT_PREALLOC) {
+ err |= FILE_EXTENT_ERROR;
+ error("root %llu EXTENT_DATA[%llu %llu] type bad",
+ root->objectid, fkey->objectid, fkey->offset);
+ return err;
+ }
+
+ /* Check REG_EXTENT/PREALLOC_EXTENT */
+ disk_bytenr = btrfs_file_extent_disk_bytenr(node, fi);
+ disk_num_bytes = btrfs_file_extent_disk_num_bytes(node, fi);
+ extent_num_bytes = btrfs_file_extent_num_bytes(node, fi);
+ is_hole = (disk_bytenr == 0) && (disk_num_bytes == 0);
+
+ /* Check EXTENT_DATA datasum */
+ ret = count_csum_range(root, disk_bytenr, disk_num_bytes, &found);
+ if (found > 0 && nodatasum) {
+ err |= ODD_CSUM_ITEM;
+ error("root %llu EXTENT_DATA[%llu %llu] nodatasum shouldn't have datasum",
+ root->objectid, fkey->objectid, fkey->offset);
+ } else if (extent_type == BTRFS_FILE_EXTENT_REG && !nodatasum &&
+ !is_hole &&
+ (ret < 0 || found == 0 || found < disk_num_bytes)) {
+ err |= CSUM_ITEM_MISSING;
+ error("root %llu EXTENT_DATA[%llu %llu] datasum missing",
+ root->objectid, fkey->objectid, fkey->offset);
+ } else if (extent_type == BTRFS_FILE_EXTENT_PREALLOC && found > 0) {
+ err |= ODD_CSUM_ITEM;
+ error("root %llu EXTENT_DATA[%llu %llu] prealloc shouldn't have datasum",
+ root->objectid, fkey->objectid, fkey->offset);
+ }
+
+ /* Check EXTENT_DATA hole */
+ if (no_holes && is_hole) {
+ err |= FILE_EXTENT_ERROR;
+ error("root %llu EXTENT_DATA[%llu %llu] shouldn't be hole",
+ root->objectid, fkey->objectid, fkey->offset);
+ } else if (!no_holes && *end != fkey->offset) {
+ err |= FILE_EXTENT_ERROR;
+ error("root %llu EXTENT_DATA[%llu %llu] interrupt",
+ root->objectid, fkey->objectid, fkey->offset);
+ }
+
+ *end += extent_num_bytes;
+ if (!is_hole)
+ *size += extent_num_bytes;
+
+ return err;
+}
+
+/*
+ * Check INODE_ITEM and related ITEMs (the same inode number)
+ * 1. check link count
+ * 2. check inode ref/extref
+ * 3. check dir item/index
+ *
+ * @ext_ref: the EXTENDED_IREF feature
+ *
+ * Return 0 if no error occurred.
+ * Return >0 for error or hit the traversal is done(by error bitmap)
+ */
+static int check_inode_item(struct btrfs_root *root, struct btrfs_path *path,
+ unsigned int ext_ref)
+{
+ struct extent_buffer *node;
+ struct btrfs_inode_item *ii;
+ struct btrfs_key key;
+ u64 inode_id;
+ u32 mode;
+ u64 nlink;
+ u64 nbytes;
+ u64 isize;
+ u64 size = 0;
+ u64 refs = 0;
+ u64 extent_end = 0;
+ u64 extent_size = 0;
+ unsigned int dir;
+ unsigned int nodatasum;
+ int slot;
+ int ret;
+ int err = 0;
+
+ node = path->nodes[0];
+ slot = path->slots[0];
+
+ btrfs_item_key_to_cpu(node, &key, slot);
+ inode_id = key.objectid;
+
+ if (inode_id == BTRFS_ORPHAN_OBJECTID) {
+ ret = btrfs_next_item(root, path);
+ if (ret > 0)
+ err |= LAST_ITEM;
+ return err;
+ }
+
+ ii = btrfs_item_ptr(node, slot, struct btrfs_inode_item);
+ isize = btrfs_inode_size(node, ii);
+ nbytes = btrfs_inode_nbytes(node, ii);
+ mode = btrfs_inode_mode(node, ii);
+ dir = imode_to_type(mode) == BTRFS_FT_DIR;
+ nlink = btrfs_inode_nlink(node, ii);
+ nodatasum = btrfs_inode_flags(node, ii) & BTRFS_INODE_NODATASUM;
+
+ while (1) {
+ ret = btrfs_next_item(root, path);
+ if (ret < 0) {
+ /* out will fill 'err' rusing current statistics */
+ goto out;
+ } else if (ret > 0) {
+ err |= LAST_ITEM;
+ goto out;
+ }
+
+ node = path->nodes[0];
+ slot = path->slots[0];
+ btrfs_item_key_to_cpu(node, &key, slot);
+ if (key.objectid != inode_id)
+ goto out;
+
+ switch (key.type) {
+ case BTRFS_INODE_REF_KEY:
+ ret = check_inode_ref(root, &key, node, slot, &refs,
+ mode);
+ err |= ret;
+ break;
+ case BTRFS_INODE_EXTREF_KEY:
+ if (key.type == BTRFS_INODE_EXTREF_KEY && !ext_ref)
+ warning("root %llu EXTREF[%llu %llu] isn't supported",
+ root->objectid, key.objectid,
+ key.offset);
+ ret = check_inode_extref(root, &key, node, slot, &refs,
+ mode);
+ err |= ret;
+ break;
+ case BTRFS_DIR_ITEM_KEY:
+ case BTRFS_DIR_INDEX_KEY:
+ if (!dir) {
+ warning("root %llu INODE[%llu] mode %u shouldn't have DIR_INDEX[%llu %llu]",
+ root->objectid, inode_id,
+ imode_to_type(mode), key.objectid,
+ key.offset);
+ }
+ ret = check_dir_item(root, &key, node, slot, &size,
+ ext_ref);
+ err |= ret;
+ break;
+ case BTRFS_EXTENT_DATA_KEY:
+ if (dir) {
+ warning("root %llu DIR INODE[%llu] shouldn't EXTENT_DATA[%llu %llu]",
+ root->objectid, inode_id, key.objectid,
+ key.offset);
+ }
+ ret = check_file_extent(root, &key, node, slot,
+ nodatasum, &extent_size,
+ &extent_end);
+ err |= ret;
+ break;
+ case BTRFS_XATTR_ITEM_KEY:
+ break;
+ default:
+ error("ITEM[%llu %u %llu] UNKNOWN TYPE",
+ key.objectid, key.type, key.offset);
+ }
+ }
+
+out:
+ /* verify INODE_ITEM nlink/isize/nbytes */
+ if (dir) {
+ if (nlink != 1) {
+ err |= LINK_COUNT_ERROR;
+ error("root %llu DIR INODE[%llu] shouldn't have more than one link(%llu)",
+ root->objectid, inode_id, nlink);
+ }
+
+ /*
+ * Just a warning, as dir inode nbytes is just an
+ * instructive value.
+ */
+ if (!IS_ALIGNED(nbytes, root->nodesize)) {
+ warning("root %llu DIR INODE[%llu] nbytes should be aligned to %u",
+ root->objectid, inode_id, root->nodesize);
+ }
+
+ if (isize != size) {
+ err |= ISIZE_ERROR;
+ error("root %llu DIR INODE [%llu] size(%llu) not equal to %llu",
+ root->objectid, inode_id, isize, size);
+ }
+ } else {
+ if (nlink != refs) {
+ err |= LINK_COUNT_ERROR;
+ error("root %llu INODE[%llu] nlink(%llu) not equal to inode_refs(%llu)",
+ root->objectid, inode_id, nlink, refs);
+ } else if (!nlink) {
+ err |= ORPHAN_ITEM;
+ }
+
+ if (!nbytes && !no_holes && extent_end < isize) {
+ err |= NBYTES_ERROR;
+ error("root %llu INODE[%llu] size (%llu) should have a file extent hole",
+ root->objectid, inode_id, isize);
+ }
+
+ if (nbytes != extent_size) {
+ err |= NBYTES_ERROR;
+ error("root %llu INODE[%llu] nbytes(%llu) not equal to extent_size(%llu)",
+ root->objectid, inode_id, nbytes, extent_size);
+ }
+ }
+
+ return err;
+}
+
+/*
+ * Iterate all item on the tree and call check_inode_item() to check.
+ *
+ * @root: the root of the tree to be checked.
+ * @ext_ref: the EXTENDED_IREF feature
+ *
+ * Return 0 if no error found.
+ * Return <0 for error.
+ * All internal error bitmap will be converted to -EIO, to avoid
+ * mixing negative and postive return value.
+ */
+static int check_fs_root_v2(struct btrfs_root *root, unsigned int ext_ref)
+{
+ struct btrfs_path *path;
+ struct btrfs_key key;
+ u64 inode_id;
+ int ret, err = 0;
+
+ path = btrfs_alloc_path();
+ if (!path)
+ return -ENOMEM;
+
+ key.objectid = 0;
+ key.type = 0;
+ key.offset = 0;
+
+ ret = btrfs_search_slot(NULL, root, &key, path, 0, 0);
+ if (ret < 0)
+ goto out;
+
+ while (1) {
+ btrfs_item_key_to_cpu(path->nodes[0], &key, path->slots[0]);
+
+ /*
+ * All check must start with inode item, skip if not
+ */
+ if (key.type == BTRFS_INODE_ITEM_KEY) {
+ ret = check_inode_item(root, path, ext_ref);
+ err |= ret;
+ if (err & LAST_ITEM)
+ goto out;
+ continue;
+ }
+ error("root %llu ITEM[%llu %u %llu] isn't INODE_ITEM, skip to next inode",
+ root->objectid, key.objectid, key.type,
+ key.offset);