#include "commands.h"
#include "free-space-cache.h"
#include "btrfsck.h"
+#include "qgroup-verify.h"
static u64 bytes_used = 0;
static u64 total_csum_bytes = 0;
static u64 data_bytes_referenced = 0;
static int found_old_backref = 0;
static LIST_HEAD(duplicate_extents);
+static LIST_HEAD(delete_items);
+static int repair = 0;
+static int no_holes = 0;
+static int init_extent_tree = 0;
+static int check_data_csum = 0;
struct extent_backref {
struct list_head list;
unsigned int found_extent_tree:1;
unsigned int full_backref:1;
unsigned int found_ref:1;
+ unsigned int broken:1;
};
struct data_backref {
struct list_head list;
struct cache_extent cache;
struct btrfs_disk_key parent_key;
- unsigned int found_rec;
u64 start;
u64 max_size;
u64 nr;
u64 refs;
u64 extent_item_refs;
u64 generation;
+ u64 parent_generation;
u64 info_objectid;
- u64 num_duplicates;
+ u32 num_duplicates;
u8 info_level;
+ unsigned int found_rec:1;
unsigned int content_checked:1;
unsigned int owner_ref_checked:1;
unsigned int is_root:1;
char name[0];
};
+struct dropping_root_item_record {
+ struct list_head list;
+ struct btrfs_root_item ri;
+ struct btrfs_key found_key;
+};
+
#define REF_ERR_NO_DIR_ITEM (1 << 0)
#define REF_ERR_NO_DIR_INDEX (1 << 1)
#define REF_ERR_NO_INODE_REF (1 << 2)
int root_level;
};
+struct bad_item {
+ struct btrfs_key key;
+ u64 root_id;
+ struct list_head list;
+};
+
+static void reset_cached_block_groups(struct btrfs_fs_info *fs_info);
+
static u8 imode_to_type(u32 imode)
{
#define S_SHIFT 12
return rec;
}
+static void print_inode_error(int errors)
+{
+ if (errors & I_ERR_NO_INODE_ITEM)
+ fprintf(stderr, ", no inode item");
+ if (errors & I_ERR_NO_ORPHAN_ITEM)
+ fprintf(stderr, ", no orphan item");
+ if (errors & I_ERR_DUP_INODE_ITEM)
+ fprintf(stderr, ", dup inode item");
+ if (errors & I_ERR_DUP_DIR_INDEX)
+ fprintf(stderr, ", dup dir index");
+ if (errors & I_ERR_ODD_DIR_ITEM)
+ fprintf(stderr, ", odd dir item");
+ if (errors & I_ERR_ODD_FILE_EXTENT)
+ fprintf(stderr, ", odd file extent");
+ if (errors & I_ERR_BAD_FILE_EXTENT)
+ fprintf(stderr, ", bad file extent");
+ if (errors & I_ERR_FILE_EXTENT_OVERLAP)
+ fprintf(stderr, ", file extent overlap");
+ if (errors & I_ERR_FILE_EXTENT_DISCOUNT)
+ fprintf(stderr, ", file extent discount");
+ if (errors & I_ERR_DIR_ISIZE_WRONG)
+ fprintf(stderr, ", dir isize wrong");
+ if (errors & I_ERR_FILE_NBYTES_WRONG)
+ fprintf(stderr, ", nbytes wrong");
+ if (errors & I_ERR_ODD_CSUM_ITEM)
+ fprintf(stderr, ", odd csum item");
+ if (errors & I_ERR_SOME_CSUM_MISSING)
+ fprintf(stderr, ", some csum missing");
+ if (errors & I_ERR_LINK_COUNT_WRONG)
+ fprintf(stderr, ", link count wrong");
+ fprintf(stderr, "\n");
+}
+
+static void print_ref_error(int errors)
+{
+ if (errors & REF_ERR_NO_DIR_ITEM)
+ fprintf(stderr, ", no dir item");
+ if (errors & REF_ERR_NO_DIR_INDEX)
+ fprintf(stderr, ", no dir index");
+ if (errors & REF_ERR_NO_INODE_REF)
+ fprintf(stderr, ", no inode ref");
+ if (errors & REF_ERR_DUP_DIR_ITEM)
+ fprintf(stderr, ", dup dir item");
+ if (errors & REF_ERR_DUP_DIR_INDEX)
+ fprintf(stderr, ", dup dir index");
+ if (errors & REF_ERR_DUP_INODE_REF)
+ fprintf(stderr, ", dup inode ref");
+ if (errors & REF_ERR_INDEX_UNMATCH)
+ fprintf(stderr, ", index unmatch");
+ if (errors & REF_ERR_FILETYPE_UNMATCH)
+ fprintf(stderr, ", filetype unmatch");
+ if (errors & REF_ERR_NAME_TOO_LONG)
+ fprintf(stderr, ", name too long");
+ if (errors & REF_ERR_NO_ROOT_REF)
+ fprintf(stderr, ", no root ref");
+ if (errors & REF_ERR_NO_ROOT_BACKREF)
+ fprintf(stderr, ", no root backref");
+ if (errors & REF_ERR_DUP_ROOT_REF)
+ fprintf(stderr, ", dup root ref");
+ if (errors & REF_ERR_DUP_ROOT_BACKREF)
+ fprintf(stderr, ", dup root backref");
+ fprintf(stderr, "\n");
+}
+
static struct inode_record *get_inode_rec(struct cache_tree *inode_cache,
u64 ino, int mod)
{
rec->errors |= I_ERR_FILE_NBYTES_WRONG;
if (rec->extent_start == (u64)-1 || rec->extent_start > 0)
rec->first_extent_gap = 0;
- if (rec->nlink > 0 && (rec->extent_end < rec->isize ||
- rec->first_extent_gap < rec->isize))
+ if (rec->nlink > 0 && !no_holes &&
+ (rec->extent_end < rec->isize ||
+ rec->first_extent_gap < rec->isize))
rec->errors |= I_ERR_FILE_EXTENT_DISCOUNT;
}
btrfs_init_path(&path);
ret = btrfs_search_slot(NULL, root, &key, &path, 0, 0);
- btrfs_release_path(root, &path);
+ btrfs_release_path(&path);
if (ret > 0)
ret = -ENOENT;
return ret;
ret = btrfs_search_slot(NULL, root->fs_info->tree_root, &key, &path,
0, 0);
BUG_ON(ret < 0);
- btrfs_release_path(root, &path);
+ btrfs_release_path(&path);
if (!ret)
return 1;
has_parent = 1;
if (key.offset == parent_root_id) {
- btrfs_release_path(root, &path);
+ btrfs_release_path(&path);
return 1;
}
path.slots[0]++;
}
- btrfs_release_path(root, &path);
+ btrfs_release_path(&path);
return has_parent? 0 : -1;
}
path.slots[0]++;
}
- btrfs_release_path(root->fs_info->csum_root, &path);
+ btrfs_release_path(&path);
return found;
}
extent_type = btrfs_file_extent_type(eb, fi);
if (extent_type == BTRFS_FILE_EXTENT_INLINE) {
- num_bytes = btrfs_file_extent_inline_len(eb, fi);
+ num_bytes = btrfs_file_extent_inline_len(eb, slot, fi);
if (num_bytes == 0)
rec->errors |= I_ERR_BAD_FILE_EXTENT;
rec->found_size += num_bytes;
u32 nritems;
int i;
int ret = 0;
+ int error = 0;
struct cache_tree *inode_cache;
struct shared_node *active_node;
if (key.objectid == BTRFS_FREE_SPACE_OBJECTID)
continue;
+ if (key.type == BTRFS_ORPHAN_ITEM_KEY)
+ continue;
if (active_node->current == NULL ||
active_node->current->ino < key.objectid) {
default:
break;
};
+ if (ret != 0)
+ error = 1;
}
- return ret;
+ return error;
}
static void reada_walk_down(struct btrfs_root *root,
u32 nritems;
u32 blocksize;
int i;
- int ret;
int level;
level = btrfs_header_level(node);
for (i = slot; i < nritems; i++) {
bytenr = btrfs_node_blockptr(node, i);
ptr_gen = btrfs_node_ptr_generation(node, i);
- ret = readahead_tree_block(root, bytenr, blocksize, ptr_gen);
- if (ret)
- break;
+ readahead_tree_block(root, bytenr, blocksize, ptr_gen);
}
}
struct extent_buffer *next;
struct extent_buffer *cur;
u32 blocksize;
- int ret;
+ int ret, err = 0;
u64 refs;
WARN_ON(*level < 0);
ret = btrfs_lookup_extent_info(NULL, root,
path->nodes[*level]->start,
*level, 1, &refs, NULL);
- if (ret < 0)
+ if (ret < 0) {
+ err = ret;
goto out;
+ }
if (refs > 1) {
ret = enter_shared_node(root, path->nodes[*level]->start,
refs, wc, *level);
- if (ret > 0)
+ if (ret > 0) {
+ err = ret;
goto out;
+ }
}
while (*level >= 0) {
reada_walk_down(root, cur, path->slots[*level]);
next = read_tree_block(root, bytenr, blocksize,
ptr_gen);
+ if (!next) {
+ err = -EIO;
+ goto out;
+ }
}
*level = *level - 1;
}
out:
path->slots[*level] = btrfs_header_nritems(path->nodes[*level]);
- return 0;
+ return err;
}
static int walk_up_tree(struct btrfs_root *root, struct btrfs_path *path,
return ret;
}
+static int repair_inode_isize(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root, struct btrfs_path *path,
+ struct inode_record *rec)
+{
+ struct btrfs_inode_item *ei;
+ struct btrfs_key key;
+ int ret;
+
+ key.objectid = rec->ino;
+ key.type = BTRFS_INODE_ITEM_KEY;
+ key.offset = (u64)-1;
+
+ ret = btrfs_search_slot(trans, root, &key, path, 0, 1);
+ if (ret < 0)
+ goto out;
+ if (ret) {
+ if (!path->slots[0]) {
+ ret = -ENOENT;
+ goto out;
+ }
+ path->slots[0]--;
+ ret = 0;
+ }
+ btrfs_item_key_to_cpu(path->nodes[0], &key, path->slots[0]);
+ if (key.objectid != rec->ino) {
+ ret = -ENOENT;
+ goto out;
+ }
+
+ ei = btrfs_item_ptr(path->nodes[0], path->slots[0],
+ struct btrfs_inode_item);
+ btrfs_set_inode_size(path->nodes[0], ei, rec->found_size);
+ btrfs_mark_buffer_dirty(path->nodes[0]);
+ rec->errors &= ~I_ERR_DIR_ISIZE_WRONG;
+ printf("reset isize for dir %Lu root %Lu\n", rec->ino,
+ root->root_key.objectid);
+out:
+ btrfs_release_path(path);
+ return ret;
+}
+
+static int repair_inode_orphan_item(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root,
+ struct btrfs_path *path,
+ struct inode_record *rec)
+{
+ struct btrfs_key key;
+ int ret;
+
+ key.objectid = BTRFS_ORPHAN_OBJECTID;
+ key.type = BTRFS_ORPHAN_ITEM_KEY;
+ key.offset = rec->ino;
+
+ ret = btrfs_insert_empty_item(trans, root, path, &key, 0);
+ btrfs_release_path(path);
+ if (!ret)
+ rec->errors &= ~I_ERR_NO_ORPHAN_ITEM;
+ return ret;
+}
+
+static int try_repair_inode(struct btrfs_root *root, struct inode_record *rec)
+{
+ struct btrfs_trans_handle *trans;
+ struct btrfs_path *path;
+ int ret = 0;
+
+ /* So far we just fix dir isize wrong */
+ if (!(rec->errors & (I_ERR_DIR_ISIZE_WRONG | I_ERR_NO_ORPHAN_ITEM)))
+ return 1;
+
+ path = btrfs_alloc_path();
+ if (!path)
+ return -ENOMEM;
+
+ trans = btrfs_start_transaction(root, 1);
+ if (IS_ERR(trans)) {
+ btrfs_free_path(path);
+ return PTR_ERR(trans);
+ }
+
+ if (rec->errors & I_ERR_DIR_ISIZE_WRONG)
+ ret = repair_inode_isize(trans, root, path, rec);
+ if (!ret && rec->errors & I_ERR_NO_ORPHAN_ITEM)
+ ret = repair_inode_orphan_item(trans, root, path, rec);
+ btrfs_commit_transaction(trans, root);
+ btrfs_free_path(path);
+ return ret;
+}
+
static int check_inode_recs(struct btrfs_root *root,
struct cache_tree *inode_cache)
{
}
}
+ if (repair) {
+ ret = try_repair_inode(root, rec);
+ if (ret == 0 && can_free_inode_rec(rec)) {
+ free_inode_rec(rec);
+ continue;
+ }
+ ret = 0;
+ }
+
error++;
if (!rec->found_inode_item)
rec->errors |= I_ERR_NO_INODE_ITEM;
if (rec->found_link != rec->nlink)
rec->errors |= I_ERR_LINK_COUNT_WRONG;
- fprintf(stderr, "root %llu inode %llu errors %x\n",
+ fprintf(stderr, "root %llu inode %llu errors %x",
(unsigned long long) root->root_key.objectid,
(unsigned long long) rec->ino, rec->errors);
+ print_inode_error(rec->errors);
list_for_each_entry(backref, &rec->backrefs, list) {
if (!backref->found_dir_item)
backref->errors |= REF_ERR_NO_DIR_ITEM;
if (!backref->found_inode_ref)
backref->errors |= REF_ERR_NO_INODE_REF;
fprintf(stderr, "\tunresolved ref dir %llu index %llu"
- " namelen %u name %s filetype %d error %x\n",
+ " namelen %u name %s filetype %d errors %x",
(unsigned long long)backref->dir,
(unsigned long long)backref->index,
backref->namelen, backref->name,
backref->filetype, backref->errors);
+ print_ref_error(backref->errors);
}
free_inode_rec(rec);
}
if (!backref->errors && rec->found_root_item)
continue;
fprintf(stderr, "\tunresolved ref root %llu dir %llu"
- " index %llu namelen %u name %s error %x\n",
+ " index %llu namelen %u name %s errors %x\n",
(unsigned long long)backref->ref_root,
(unsigned long long)backref->dir,
(unsigned long long)backref->index,
backref->namelen, backref->name,
backref->errors);
+ print_ref_error(backref->errors);
}
}
return errors > 0 ? 1 : 0;
if (wret != 0)
break;
}
- btrfs_release_path(root, &path);
+ btrfs_release_path(&path);
merge_root_recs(root, &root_node.root_cache, root_cache);
static int fs_root_objectid(u64 objectid)
{
- if (objectid == BTRFS_FS_TREE_OBJECTID ||
- objectid == BTRFS_TREE_RELOC_OBJECTID ||
- objectid == BTRFS_DATA_RELOC_TREE_OBJECTID ||
- (objectid >= BTRFS_FIRST_FREE_OBJECTID &&
- objectid <= BTRFS_LAST_FREE_OBJECTID))
+ if (objectid == BTRFS_TREE_RELOC_OBJECTID ||
+ objectid == BTRFS_DATA_RELOC_TREE_OBJECTID)
return 1;
- return 0;
+ return is_fstree(objectid);
}
static int check_fs_roots(struct btrfs_root *root,
int ret;
int err = 0;
+ /*
+ * 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);
btrfs_item_key_to_cpu(leaf, &key, path.slots[0]);
if (key.type == BTRFS_ROOT_ITEM_KEY &&
fs_root_objectid(key.objectid)) {
- tmp_root = btrfs_read_fs_root_no_cache(root->fs_info,
- &key);
+ 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)
err = 1;
- 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,
next:
path.slots[0]++;
}
- btrfs_release_path(tree_root, &path);
+ btrfs_release_path(&path);
if (!cache_tree_empty(&wc.shared))
fprintf(stderr, "warning line %d\n", __LINE__);
path.slots[level + 1]))
found = 1;
- btrfs_release_path(ref_root, &path);
+ btrfs_release_path(&path);
return found ? 0 : 1;
}
return btrfs_add_corrupt_extent_record(info, &key, start, len, 0);
}
-static int check_block(struct btrfs_root *root,
+static int swap_values(struct btrfs_root *root, struct btrfs_path *path,
+ struct extent_buffer *buf, int slot)
+{
+ if (btrfs_header_level(buf)) {
+ struct btrfs_key_ptr ptr1, ptr2;
+
+ read_extent_buffer(buf, &ptr1, btrfs_node_key_ptr_offset(slot),
+ sizeof(struct btrfs_key_ptr));
+ read_extent_buffer(buf, &ptr2,
+ btrfs_node_key_ptr_offset(slot + 1),
+ sizeof(struct btrfs_key_ptr));
+ write_extent_buffer(buf, &ptr1,
+ btrfs_node_key_ptr_offset(slot + 1),
+ sizeof(struct btrfs_key_ptr));
+ write_extent_buffer(buf, &ptr2,
+ btrfs_node_key_ptr_offset(slot),
+ sizeof(struct btrfs_key_ptr));
+ if (slot == 0) {
+ struct btrfs_disk_key key;
+ btrfs_node_key(buf, &key, 0);
+ btrfs_fixup_low_keys(root, path, &key,
+ btrfs_header_level(buf) + 1);
+ }
+ } else {
+ struct btrfs_item *item1, *item2;
+ struct btrfs_key k1, k2;
+ char *item1_data, *item2_data;
+ u32 item1_offset, item2_offset, item1_size, item2_size;
+
+ item1 = btrfs_item_nr(slot);
+ item2 = btrfs_item_nr(slot + 1);
+ btrfs_item_key_to_cpu(buf, &k1, slot);
+ btrfs_item_key_to_cpu(buf, &k2, slot + 1);
+ item1_offset = btrfs_item_offset(buf, item1);
+ item2_offset = btrfs_item_offset(buf, item2);
+ item1_size = btrfs_item_size(buf, item1);
+ item2_size = btrfs_item_size(buf, item2);
+
+ item1_data = malloc(item1_size);
+ if (!item1_data)
+ return -ENOMEM;
+ item2_data = malloc(item2_size);
+ if (!item2_data) {
+ free(item1_data);
+ return -ENOMEM;
+ }
+
+ read_extent_buffer(buf, item1_data, item1_offset, item1_size);
+ read_extent_buffer(buf, item2_data, item2_offset, item2_size);
+
+ write_extent_buffer(buf, item1_data, item2_offset, item2_size);
+ write_extent_buffer(buf, item2_data, item1_offset, item1_size);
+ free(item1_data);
+ free(item2_data);
+
+ btrfs_set_item_offset(buf, item1, item2_offset);
+ btrfs_set_item_offset(buf, item2, item1_offset);
+ btrfs_set_item_size(buf, item1, item2_size);
+ btrfs_set_item_size(buf, item2, item1_size);
+
+ path->slots[0] = slot;
+ btrfs_set_item_key_unsafe(root, path, &k2);
+ path->slots[0] = slot + 1;
+ btrfs_set_item_key_unsafe(root, path, &k1);
+ }
+ return 0;
+}
+
+/*
+ * Attempt to fix basic block failures. Currently we only handle bad key
+ * orders, we will cycle through the keys and swap them if necessary.
+ */
+static int try_to_fix_bad_block(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root,
+ struct extent_buffer *buf,
+ struct btrfs_disk_key *parent_key,
+ enum btrfs_tree_block_status status)
+{
+ struct btrfs_path *path;
+ struct btrfs_key k1, k2;
+ int i;
+ int level;
+ int ret;
+
+ if (status != BTRFS_TREE_BLOCK_BAD_KEY_ORDER)
+ return -EIO;
+
+ k1.objectid = btrfs_header_owner(buf);
+ k1.type = BTRFS_ROOT_ITEM_KEY;
+ k1.offset = (u64)-1;
+
+ root = btrfs_read_fs_root(root->fs_info, &k1);
+ if (IS_ERR(root))
+ return -EIO;
+
+ path = btrfs_alloc_path();
+ if (!path)
+ return -EIO;
+
+ level = btrfs_header_level(buf);
+ path->lowest_level = level;
+ path->skip_check_block = 1;
+ if (level)
+ btrfs_node_key_to_cpu(buf, &k1, 0);
+ else
+ btrfs_item_key_to_cpu(buf, &k1, 0);
+
+ ret = btrfs_search_slot(trans, root, &k1, path, 0, 1);
+ if (ret) {
+ btrfs_free_path(path);
+ return -EIO;
+ }
+
+ buf = path->nodes[level];
+ for (i = 0; i < btrfs_header_nritems(buf) - 1; i++) {
+ if (level) {
+ btrfs_node_key_to_cpu(buf, &k1, i);
+ btrfs_node_key_to_cpu(buf, &k2, i + 1);
+ } else {
+ btrfs_item_key_to_cpu(buf, &k1, i);
+ btrfs_item_key_to_cpu(buf, &k2, i + 1);
+ }
+ if (btrfs_comp_cpu_keys(&k1, &k2) < 0)
+ continue;
+ ret = swap_values(root, path, buf, i);
+ if (ret)
+ break;
+ btrfs_mark_buffer_dirty(buf);
+ i = 0;
+ }
+
+ btrfs_free_path(path);
+ return ret;
+}
+
+static int check_block(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root,
struct cache_tree *extent_cache,
struct extent_buffer *buf, u64 flags)
{
struct extent_record *rec;
struct cache_extent *cache;
struct btrfs_key key;
- int ret = 1;
+ enum btrfs_tree_block_status status;
+ int ret = 0;
int level;
cache = lookup_cache_extent(extent_cache, buf->start, buf->len);
rec->info_level = level;
if (btrfs_is_leaf(buf))
- ret = btrfs_check_leaf(root, &rec->parent_key, buf);
+ status = btrfs_check_leaf(root, &rec->parent_key, buf);
else
- ret = btrfs_check_node(root, &rec->parent_key, buf);
-
- if (ret) {
- fprintf(stderr, "bad block %llu\n",
- (unsigned long long)buf->start);
+ status = btrfs_check_node(root, &rec->parent_key, buf);
+
+ if (status != BTRFS_TREE_BLOCK_CLEAN) {
+ if (repair)
+ status = try_to_fix_bad_block(trans, root, buf,
+ &rec->parent_key,
+ status);
+ if (status != BTRFS_TREE_BLOCK_CLEAN) {
+ ret = -EIO;
+ fprintf(stderr, "bad block %llu\n",
+ (unsigned long long)buf->start);
+ } else {
+ /*
+ * Signal to callers we need to start the scan over
+ * again since we'll have cow'ed blocks.
+ */
+ ret = -EAGAIN;
+ }
} else {
rec->content_checked = 1;
if (flags & BTRFS_BLOCK_FLAG_FULL_BACKREF)
}
static int add_extent_rec(struct cache_tree *extent_cache,
- struct btrfs_key *parent_key,
+ struct btrfs_key *parent_key, u64 parent_gen,
u64 start, u64 nr, u64 extent_item_refs,
int is_root, int inc_ref, int set_checked,
int metadata, int extent_rec, u64 max_size)
if (parent_key)
btrfs_cpu_key_to_disk(&rec->parent_key, parent_key);
+ if (parent_gen)
+ rec->parent_generation = parent_gen;
if (rec->max_size < max_size)
rec->max_size = max_size;
rec->start = start;
rec->max_size = max_size;
rec->nr = max(nr, max_size);
- rec->found_rec = extent_rec;
+ rec->found_rec = !!extent_rec;
rec->content_checked = 0;
rec->owner_ref_checked = 0;
rec->num_duplicates = 0;
else
memset(&rec->parent_key, 0, sizeof(*parent_key));
+ if (parent_gen)
+ rec->parent_generation = parent_gen;
+ else
+ rec->parent_generation = 0;
+
rec->cache.start = start;
rec->cache.size = nr;
ret = insert_cache_extent(extent_cache, &rec->cache);
cache = lookup_cache_extent(extent_cache, bytenr, 1);
if (!cache) {
- add_extent_rec(extent_cache, NULL, bytenr,
+ add_extent_rec(extent_cache, NULL, 0, bytenr,
1, 0, 0, 0, 0, 1, 0, 0);
cache = lookup_cache_extent(extent_cache, bytenr, 1);
if (!cache)
}
back->node.found_extent_tree = 1;
}
+ maybe_free_extent_rec(extent_cache, rec);
return 0;
}
cache = lookup_cache_extent(extent_cache, bytenr, 1);
if (!cache) {
- add_extent_rec(extent_cache, NULL, bytenr, 1, 0, 0, 0, 0,
+ add_extent_rec(extent_cache, NULL, 0, bytenr, 1, 0, 0, 0, 0,
0, 0, max_size);
cache = lookup_cache_extent(extent_cache, bytenr, 1);
if (!cache)
} else {
if (back->node.found_extent_tree) {
fprintf(stderr, "Extent back ref already exists "
- "for %llu parent %llu root %llu"
+ "for %llu parent %llu root %llu "
"owner %llu offset %llu num_refs %lu\n",
(unsigned long long)bytenr,
(unsigned long long)parent,
back->num_refs = num_refs;
back->node.found_extent_tree = 1;
}
+ maybe_free_extent_rec(extent_cache, rec);
return 0;
}
cache = search_cache_extent(reada, 0);
if (cache) {
bits[0].start = cache->start;
- bits[1].size = cache->size;
+ bits[0].size = cache->size;
*reada_bits = 1;
return 1;
}
#else
BUG();
#endif
- return add_extent_rec(extent_cache, NULL, key.objectid,
+ return add_extent_rec(extent_cache, NULL, 0, key.objectid,
num_bytes, refs, 0, 0, 0, metadata, 1,
num_bytes);
}
ei = btrfs_item_ptr(eb, slot, struct btrfs_extent_item);
refs = btrfs_extent_refs(eb, ei);
- add_extent_rec(extent_cache, NULL, key.objectid, num_bytes,
+ add_extent_rec(extent_cache, NULL, 0, key.objectid, num_bytes,
refs, 0, 0, 0, metadata, 1, num_bytes);
ptr = (unsigned long)(ei + 1);
ret = btrfs_search_slot(NULL, root, &key, path, 0, 0);
if (ret < 0)
- return ret;
+ goto out;
ret = 0;
while (1) {
if (path->slots[0] >= btrfs_header_nritems(path->nodes[0])) {
ret = btrfs_next_leaf(root, path);
if (ret < 0)
- return ret;
+ goto out;
if (ret > 0) {
ret = 0;
break;
ret = check_cache_range(root, cache, last,
cache->key.objectid +
cache->key.offset - last);
+
+out:
btrfs_free_path(path);
if (!ret &&
int ret;
int error = 0;
- if (btrfs_super_generation(root->fs_info->super_copy) !=
+ if (btrfs_super_cache_generation(root->fs_info->super_copy) != -1ULL &&
+ btrfs_super_generation(root->fs_info->super_copy) !=
btrfs_super_cache_generation(root->fs_info->super_copy)) {
printf("cache and super generation don't match, space cache "
"will be invalidated\n");
return error ? -EINVAL : 0;
}
+static int read_extent_data(struct btrfs_root *root, char *data,
+ u64 logical, u64 *len, int mirror)
+{
+ u64 offset = 0;
+ struct btrfs_multi_bio *multi = NULL;
+ struct btrfs_fs_info *info = root->fs_info;
+ struct btrfs_device *device;
+ int ret = 0;
+ u64 max_len = *len;
+
+ ret = btrfs_map_block(&info->mapping_tree, READ, logical, len,
+ &multi, mirror, NULL);
+ if (ret) {
+ fprintf(stderr, "Couldn't map the block %llu\n",
+ logical + offset);
+ goto err;
+ }
+ device = multi->stripes[0].dev;
+
+ if (device->fd == 0)
+ goto err;
+ if (*len > max_len)
+ *len = max_len;
+
+ ret = pread64(device->fd, data, *len, multi->stripes[0].physical);
+ if (ret != *len)
+ ret = -EIO;
+ else
+ ret = 0;
+err:
+ kfree(multi);
+ return ret;
+}
+
+static int check_extent_csums(struct btrfs_root *root, u64 bytenr,
+ u64 num_bytes, unsigned long leaf_offset,
+ struct extent_buffer *eb) {
+
+ u64 offset = 0;
+ u16 csum_size = btrfs_super_csum_size(root->fs_info->super_copy);
+ char *data;
+ unsigned long csum_offset;
+ u32 csum;
+ u32 csum_expected;
+ u64 read_len;
+ u64 data_checked = 0;
+ u64 tmp;
+ int ret = 0;
+ int mirror;
+ int num_copies;
+
+ if (num_bytes % root->sectorsize)
+ return -EINVAL;
+
+ data = malloc(num_bytes);
+ if (!data)
+ return -ENOMEM;
+
+ while (offset < num_bytes) {
+ mirror = 0;
+again:
+ read_len = num_bytes - offset;
+ /* read as much space once a time */
+ ret = read_extent_data(root, data + offset,
+ bytenr + offset, &read_len, mirror);
+ if (ret)
+ goto out;
+ data_checked = 0;
+ /* verify every 4k data's checksum */
+ while (data_checked < read_len) {
+ csum = ~(u32)0;
+ tmp = offset + data_checked;
+
+ csum = btrfs_csum_data(NULL, (char *)data + tmp,
+ csum, root->sectorsize);
+ btrfs_csum_final(csum, (char *)&csum);
+
+ csum_offset = leaf_offset +
+ tmp / root->sectorsize * csum_size;
+ read_extent_buffer(eb, (char *)&csum_expected,
+ csum_offset, csum_size);
+ /* try another mirror */
+ if (csum != csum_expected) {
+ fprintf(stderr, "mirror %d bytenr %llu csum %u expected csum %u\n",
+ mirror, bytenr + tmp,
+ csum, csum_expected);
+ num_copies = btrfs_num_copies(
+ &root->fs_info->mapping_tree,
+ bytenr, num_bytes);
+ if (mirror < num_copies - 1) {
+ mirror += 1;
+ goto again;
+ }
+ }
+ data_checked += root->sectorsize;
+ }
+ offset += read_len;
+ }
+out:
+ free(data);
+ return ret;
+}
+
static int check_extent_exists(struct btrfs_root *root, u64 bytenr,
u64 num_bytes)
{
* in real life, but no harm in coding it up
* anyway just in case.
*/
- btrfs_release_path(root, path);
+ btrfs_release_path(path);
ret = check_extent_exists(root, new_start,
new_bytes);
if (ret) {
u16 csum_size = btrfs_super_csum_size(root->fs_info->super_copy);
int errors = 0;
int ret;
+ u64 data_len;
+ unsigned long leaf_offset;
root = root->fs_info->csum_root;
continue;
}
+ data_len = (btrfs_item_size_nr(leaf, path->slots[0]) /
+ csum_size) * root->sectorsize;
+ if (!check_data_csum)
+ goto skip_csum_check;
+ leaf_offset = btrfs_item_ptr_offset(leaf, path->slots[0]);
+ ret = check_extent_csums(root, key.offset, data_len,
+ leaf_offset, leaf);
+ if (ret)
+ break;
+skip_csum_check:
if (!num_bytes) {
offset = key.offset;
} else if (key.offset != offset + num_bytes) {
offset = key.offset;
num_bytes = 0;
}
-
- num_bytes += (btrfs_item_size_nr(leaf, path->slots[0]) /
- csum_size) * root->sectorsize;
+ num_bytes += data_len;
path->slots[0]++;
}
return errors;
}
-static int run_next_block(struct btrfs_root *root,
+static int is_dropped_key(struct btrfs_key *key,
+ struct btrfs_key *drop_key) {
+ if (key->objectid < drop_key->objectid)
+ return 1;
+ else if (key->objectid == drop_key->objectid) {
+ if (key->type < drop_key->type)
+ return 1;
+ else if (key->type == drop_key->type) {
+ if (key->offset < drop_key->offset)
+ return 1;
+ }
+ }
+ return 0;
+}
+
+static int run_next_block(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root,
struct block_info *bits,
int bits_nr,
u64 *last,
struct cache_tree *chunk_cache,
struct rb_root *dev_cache,
struct block_group_tree *block_group_cache,
- struct device_extent_tree *dev_extent_cache)
+ struct device_extent_tree *dev_extent_cache,
+ struct btrfs_root_item *ri)
{
struct extent_buffer *buf;
u64 bytenr;
u64 parent;
u64 owner;
u64 flags;
- int ret;
+ u64 ptr;
+ u64 gen = 0;
+ int ret = 0;
int i;
int nritems;
struct btrfs_key key;
remove_cache_extent(nodes, cache);
free(cache);
}
+ cache = lookup_cache_extent(extent_cache, bytenr, size);
+ if (cache) {
+ struct extent_record *rec;
+
+ rec = container_of(cache, struct extent_record, cache);
+ gen = rec->parent_generation;
+ }
/* fixme, get the real parent transid */
- buf = read_tree_block(root, bytenr, size, 0);
+ buf = read_tree_block(root, bytenr, size, gen);
if (!extent_buffer_uptodate(buf)) {
record_bad_block_io(root->fs_info,
extent_cache, bytenr, size);
nritems = btrfs_header_nritems(buf);
- ret = btrfs_lookup_extent_info(NULL, root, bytenr,
+ /*
+ * FIXME, this only works only if we don't have any full
+ * backref mode.
+ */
+ if (!init_extent_tree) {
+ ret = btrfs_lookup_extent_info(NULL, root, bytenr,
btrfs_header_level(buf), 1, NULL,
&flags);
- if (ret < 0)
- flags = BTRFS_BLOCK_FLAG_FULL_BACKREF;
+ if (ret < 0)
+ flags = 0;
+ } else {
+ flags = 0;
+ }
if (flags & BTRFS_BLOCK_FLAG_FULL_BACKREF) {
parent = bytenr;
owner = btrfs_header_owner(buf);
}
- ret = check_block(root, extent_cache, buf, flags);
+ ret = check_block(trans, root, extent_cache, buf, flags);
if (ret)
goto out;
0, root->sectorsize);
continue;
}
+ if (key.type == BTRFS_ORPHAN_ITEM_KEY) {
+ struct bad_item *bad;
+
+ if (key.objectid == BTRFS_ORPHAN_OBJECTID)
+ continue;
+ if (!owner)
+ continue;
+ bad = malloc(sizeof(struct bad_item));
+ if (!bad)
+ continue;
+ INIT_LIST_HEAD(&bad->list);
+ memcpy(&bad->key, &key,
+ sizeof(struct btrfs_key));
+ bad->root_id = owner;
+ list_add_tail(&bad->list, &delete_items);
+ continue;
+ }
if (key.type != BTRFS_EXTENT_DATA_KEY)
continue;
fi = btrfs_item_ptr(buf, i,
parent, owner, key.objectid, key.offset -
btrfs_file_extent_offset(buf, fi), 1, 1,
btrfs_file_extent_disk_num_bytes(buf, fi));
- BUG_ON(ret);
}
} else {
int level;
btrfs_item_key_to_cpu(buf, &first_key, 0);
level = btrfs_header_level(buf);
for (i = 0; i < nritems; i++) {
- u64 ptr = btrfs_node_blockptr(buf, i);
- u32 size = btrfs_level_size(root, level - 1);
+ ptr = btrfs_node_blockptr(buf, i);
+ size = btrfs_level_size(root, level - 1);
btrfs_node_key_to_cpu(buf, &key, i);
+ if (ri != NULL) {
+ struct btrfs_key drop_key;
+ btrfs_disk_key_to_cpu(&drop_key,
+ &ri->drop_progress);
+ if ((level == ri->drop_level)
+ && is_dropped_key(&key, &drop_key)) {
+ continue;
+ }
+ }
ret = add_extent_rec(extent_cache, &key,
+ btrfs_node_ptr_generation(buf, i),
ptr, size, 0, 0, 1, 0, 1, 0,
size);
BUG_ON(ret);
found_old_backref = 1;
out:
free_extent_buffer(buf);
- return 0;
+ return ret;
}
static int add_root_to_pending(struct extent_buffer *buf,
add_pending(nodes, seen, buf->start, buf->len);
else
add_pending(pending, seen, buf->start, buf->len);
- add_extent_rec(extent_cache, NULL, buf->start, buf->len,
+ add_extent_rec(extent_cache, NULL, 0, buf->start, buf->len,
0, 1, 1, 0, 1, 0, buf->len);
if (root_key->objectid == BTRFS_TREE_RELOC_OBJECTID ||
found_key.type != BTRFS_EXTENT_REF_V0_KEY &&
found_key.type != BTRFS_SHARED_BLOCK_REF_KEY &&
found_key.type != BTRFS_SHARED_DATA_REF_KEY) {
- btrfs_release_path(NULL, path);
+ btrfs_release_path(path);
if (found_key.type == 0) {
if (found_key.offset == 0)
break;
ret = btrfs_del_item(trans, root->fs_info->extent_root, path);
if (ret)
break;
- btrfs_release_path(NULL, path);
+ btrfs_release_path(path);
if (found_key.type == BTRFS_EXTENT_ITEM_KEY ||
found_key.type == BTRFS_METADATA_ITEM_KEY) {
}
}
- btrfs_release_path(NULL, path);
+ btrfs_release_path(path);
return ret;
}
bi = (struct btrfs_tree_block_info *)(ei + 1);
memset_extent_buffer(leaf, 0, (unsigned long)bi,
sizeof(*bi));
- memset(©_key, 0, sizeof(copy_key));
- copy_key.objectid = le64_to_cpu(rec->info_objectid);
+ btrfs_set_disk_key_objectid(©_key,
+ rec->info_objectid);
+ btrfs_set_disk_key_type(©_key, 0);
+ btrfs_set_disk_key_offset(©_key, 0);
+
btrfs_set_tree_block_level(leaf, bi, rec->info_level);
btrfs_set_tree_block_key(leaf, bi, ©_key);
rec->max_size, 1, 0);
if (ret)
goto fail;
- btrfs_release_path(NULL, path);
+ btrfs_release_path(path);
}
if (back->is_data) {
if (ret)
goto fail;
fail:
- btrfs_release_path(NULL, path);
+ btrfs_release_path(path);
return ret;
}
u64 bytenr;
u64 bytes;
int count;
+ int broken;
struct list_head list;
};
}
/*
+ * If there are as many broken entries as entries then we know
+ * not to trust this particular entry.
+ */
+ if (entry->broken == entry->count)
+ continue;
+
+ /*
* If our current entry == best then we can't be sure our best
* is really the best, so we need to keep searching.
*/
}
/* Prev == entry, not good enough, have to keep searching */
- if (prev->count == entry->count)
+ if (!prev->broken && prev->count == entry->count)
continue;
if (!best)
path->slots[0]++;
}
- btrfs_release_path(root, path);
+ btrfs_release_path(path);
/*
* Have to make sure that this root gets updated when we commit the
return -EINVAL;
}
- if (dback->disk_bytenr > entry->bytenr) {
+ if (dback->node.broken && dback->disk_bytenr != entry->bytenr) {
+ btrfs_set_file_extent_disk_bytenr(leaf, fi, entry->bytenr);
+ } else if (dback->disk_bytenr > entry->bytenr) {
u64 off_diff, offset;
off_diff = dback->disk_bytenr - entry->bytenr;
else
printf("ram bytes may be wrong?\n");
btrfs_mark_buffer_dirty(leaf);
- btrfs_release_path(root, path);
+ btrfs_release_path(path);
return 0;
}
struct extent_entry *entry, *best = NULL;
LIST_HEAD(entries);
int nr_entries = 0;
+ int broken_entries = 0;
int ret = 0;
+ short mismatch = 0;
/*
* Metadata is easy and the backrefs should always agree on bytenr and
list_add_tail(&entry->list, &entries);
nr_entries++;
}
+
+ /*
+ * If we only have on entry we may think the entries agree when
+ * in reality they don't so we have to do some extra checking.
+ */
+ if (dback->disk_bytenr != rec->start ||
+ dback->bytes != rec->nr || back->broken)
+ mismatch = 1;
+
+ if (back->broken) {
+ entry->broken++;
+ broken_entries++;
+ }
+
entry->count++;
}
/* Yay all the backrefs agree, carry on good sir */
- if (nr_entries <= 1)
+ if (nr_entries <= 1 && !mismatch)
goto out;
fprintf(stderr, "attempting to repair backref discrepency for bytenr "
*/
if (!best) {
entry = find_entry(&entries, rec->start, rec->nr);
- if (!entry) {
- fprintf(stderr, "Backrefs don't agree with eachother "
+ if (!entry && (!broken_entries || !rec->found_rec)) {
+ fprintf(stderr, "Backrefs don't agree with each other "
"and extent record doesn't agree with anybody,"
" so we can't fix bytenr %Lu bytes %Lu\n",
rec->start, rec->nr);
ret = -EINVAL;
goto out;
- }
- entry->count++;
- best = find_most_right_entry(&entries);
- if (!best) {
- fprintf(stderr, "Backrefs and extent record evenly "
- "split on who is right, this is going to "
- "require user input to fix bytenr %Lu bytes "
- "%Lu\n", rec->start, rec->nr);
+ } else if (!entry) {
+ /*
+ * Ok our backrefs were broken, we'll assume this is the
+ * correct value and add an entry for this range.
+ */
+ entry = malloc(sizeof(struct extent_entry));
+ if (!entry) {
+ ret = -ENOMEM;
+ goto out;
+ }
+ memset(entry, 0, sizeof(*entry));
+ entry->bytenr = rec->start;
+ entry->bytes = rec->nr;
+ list_add_tail(&entry->list, &entries);
+ nr_entries++;
+ }
+ entry->count++;
+ best = find_most_right_entry(&entries);
+ if (!best) {
+ fprintf(stderr, "Backrefs and extent record evenly "
+ "split on who is right, this is going to "
+ "require user input to fix bytenr %Lu bytes "
+ "%Lu\n", rec->start, rec->nr);
ret = -EINVAL;
goto out;
}
ret = btrfs_del_item(trans, root, path);
if (ret)
goto out;
- btrfs_release_path(root, path);
+ btrfs_release_path(path);
nr_del++;
}
return ret ? ret : nr_del;
}
+static int find_possible_backrefs(struct btrfs_trans_handle *trans,
+ struct btrfs_fs_info *info,
+ struct btrfs_path *path,
+ struct cache_tree *extent_cache,
+ struct extent_record *rec)
+{
+ struct btrfs_root *root;
+ struct extent_backref *back;
+ struct data_backref *dback;
+ struct cache_extent *cache;
+ struct btrfs_file_extent_item *fi;
+ struct btrfs_key key;
+ u64 bytenr, bytes;
+ int ret;
+
+ list_for_each_entry(back, &rec->backrefs, list) {
+ dback = (struct data_backref *)back;
+
+ /* We found this one, we don't need to do a lookup */
+ if (dback->found_ref)
+ continue;
+ /* Don't care about full backrefs (poor unloved backrefs) */
+ if (back->full_backref)
+ continue;
+ key.objectid = dback->root;
+ key.type = BTRFS_ROOT_ITEM_KEY;
+ key.offset = (u64)-1;
+
+ root = btrfs_read_fs_root(info, &key);
+
+ /* No root, definitely a bad ref, skip */
+ if (IS_ERR(root) && PTR_ERR(root) == -ENOENT)
+ continue;
+ /* Other err, exit */
+ if (IS_ERR(root))
+ return PTR_ERR(root);
+
+ key.objectid = dback->owner;
+ key.type = BTRFS_EXTENT_DATA_KEY;
+ key.offset = dback->offset;
+ ret = btrfs_search_slot(NULL, root, &key, path, 0, 0);
+ if (ret) {
+ btrfs_release_path(path);
+ if (ret < 0)
+ return ret;
+ /* Didn't find it, we can carry on */
+ ret = 0;
+ continue;
+ }
+
+ fi = btrfs_item_ptr(path->nodes[0], path->slots[0],
+ struct btrfs_file_extent_item);
+ bytenr = btrfs_file_extent_disk_bytenr(path->nodes[0], fi);
+ bytes = btrfs_file_extent_disk_num_bytes(path->nodes[0], fi);
+ btrfs_release_path(path);
+ cache = lookup_cache_extent(extent_cache, bytenr, 1);
+ if (cache) {
+ struct extent_record *tmp;
+ tmp = container_of(cache, struct extent_record, cache);
+
+ /*
+ * If we found an extent record for the bytenr for this
+ * particular backref then we can't add it to our
+ * current extent record. We only want to add backrefs
+ * that don't have a corresponding extent item in the
+ * extent tree since they likely belong to this record
+ * and we need to fix it if it doesn't match bytenrs.
+ */
+ if (tmp->found_rec)
+ continue;
+ }
+
+ dback->found_ref += 1;
+ dback->disk_bytenr = bytenr;
+ dback->bytes = bytes;
+
+ /*
+ * Set this so the verify backref code knows not to trust the
+ * values in this backref.
+ */
+ back->broken = 1;
+ }
+
+ return 0;
+}
+
/*
* when an incorrect extent item is found, this will delete
* all of the existing entries for it and recreate them
*/
static int fixup_extent_refs(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *info,
+ struct cache_tree *extent_cache,
struct extent_record *rec)
{
int ret;
int allocated = 0;
u64 flags = 0;
- /* remember our flags for recreating the extent */
- ret = btrfs_lookup_extent_info(NULL, info->extent_root, rec->start,
- rec->max_size, rec->metadata, NULL,
- &flags);
- if (ret < 0)
- flags = BTRFS_BLOCK_FLAG_FULL_BACKREF;
+ /*
+ * remember our flags for recreating the extent.
+ * FIXME, if we have cleared extent tree, we can not
+ * lookup extent info in extent tree.
+ */
+ if (!init_extent_tree) {
+ ret = btrfs_lookup_extent_info(NULL, info->extent_root,
+ rec->start, rec->max_size,
+ rec->metadata, NULL, &flags);
+ if (ret < 0)
+ flags = 0;
+ } else {
+ flags = 0;
+ }
path = btrfs_alloc_path();
+ if (!path)
+ return -ENOMEM;
+
+ if (rec->refs != rec->extent_item_refs && !rec->metadata) {
+ /*
+ * Sometimes the backrefs themselves are so broken they don't
+ * get attached to any meaningful rec, so first go back and
+ * check any of our backrefs that we couldn't find and throw
+ * them into the list if we find the backref so that
+ * verify_backrefs can figure out what to do.
+ */
+ ret = find_possible_backrefs(trans, info, path, extent_cache,
+ rec);
+ if (ret < 0)
+ goto out;
+ }
/* step one, make sure all of the backrefs agree */
ret = verify_backrefs(trans, info, path, rec);
goto out;
} else {
level++;
- btrfs_release_path(NULL, &path);
+ btrfs_release_path(&path);
goto again;
}
ret = btrfs_del_ptr(trans, info->extent_root, &path, level, slot);
out:
- btrfs_release_path(NULL, &path);
+ btrfs_release_path(&path);
return ret;
}
FREE_EXTENT_CACHE_BASED_TREE(corrupt_blocks, free_corrupt_block);
-static int check_block_group(struct btrfs_trans_handle *trans,
- struct btrfs_fs_info *info,
- struct map_lookup *map,
- int *reinit)
-{
- struct btrfs_key key;
- struct btrfs_path path;
- int ret;
-
- key.objectid = map->ce.start;
- key.offset = map->ce.size;
- key.type = BTRFS_BLOCK_GROUP_ITEM_KEY;
-
- btrfs_init_path(&path);
- ret = btrfs_search_slot(NULL, info->extent_root,
- &key, &path, 0, 0);
- btrfs_release_path(NULL, &path);
- if (ret <= 0)
- goto out;
-
- ret = btrfs_make_block_group(trans, info->extent_root, 0, map->type,
- BTRFS_FIRST_CHUNK_TREE_OBJECTID,
- key.objectid, key.offset);
- *reinit = 1;
-out:
- return ret;
-}
-
-static int check_block_groups(struct btrfs_trans_handle *trans,
- struct btrfs_fs_info *info, int *reinit)
-{
- struct cache_extent *ce;
- struct map_lookup *map;
- struct btrfs_mapping_tree *map_tree = &info->mapping_tree;
-
- /* this isn't quite working */
- return 0;
-
- ce = search_cache_extent(&map_tree->cache_tree, 0);
- while (1) {
- if (!ce)
- break;
- map = container_of(ce, struct map_lookup, ce);
- check_block_group(trans, info, map, reinit);
- ce = next_cache_extent(ce);
- }
- return 0;
-}
-
static void reset_cached_block_groups(struct btrfs_fs_info *fs_info)
{
struct btrfs_block_group_cache *cache;
static int check_extent_refs(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
- struct cache_tree *extent_cache, int repair)
+ struct cache_tree *extent_cache)
{
struct extent_record *rec;
struct cache_extent *cache;
int err = 0;
int ret = 0;
int fixed = 0;
- int reinit = 0;
int had_dups = 0;
if (repair) {
cache = next_cache_extent(cache);
}
prune_corrupt_blocks(trans, root->fs_info);
- check_block_groups(trans, root->fs_info, &reinit);
- if (reinit)
- btrfs_read_block_groups(root->fs_info->extent_root);
reset_cached_block_groups(root->fs_info);
}
(unsigned long long)rec->extent_item_refs,
(unsigned long long)rec->refs);
if (!fixed && repair) {
- ret = fixup_extent_refs(trans, root->fs_info, rec);
+ ret = fixup_extent_refs(trans, root->fs_info,
+ extent_cache, rec);
if (ret)
goto repair_abort;
fixed = 1;
(unsigned long long)rec->nr);
if (!fixed && repair) {
- ret = fixup_extent_refs(trans, root->fs_info, rec);
+ ret = fixup_extent_refs(trans, root->fs_info,
+ extent_cache, rec);
if (ret)
goto repair_abort;
fixed = 1;
(unsigned long long)rec->start,
(unsigned long long)rec->nr);
if (!fixed && repair) {
- ret = fixup_extent_refs(trans, root->fs_info, rec);
+ ret = fixup_extent_refs(trans, root->fs_info,
+ extent_cache, rec);
if (ret)
goto repair_abort;
fixed = 1;
return ret;
}
-static int check_chunks_and_extents(struct btrfs_root *root, int repair)
+static int check_chunks_and_extents(struct btrfs_root *root)
{
struct rb_root dev_cache;
struct cache_tree chunk_cache;
struct btrfs_trans_handle *trans = NULL;
int slot;
struct btrfs_root_item ri;
+ struct list_head dropping_trees;
dev_cache = RB_ROOT;
cache_tree_init(&chunk_cache);
cache_tree_init(&nodes);
cache_tree_init(&reada);
cache_tree_init(&corrupt_blocks);
+ INIT_LIST_HEAD(&dropping_trees);
if (repair) {
trans = btrfs_start_transaction(root, 1);
offset = btrfs_item_ptr_offset(leaf, path.slots[0]);
read_extent_buffer(leaf, &ri, offset, sizeof(ri));
- buf = read_tree_block(root->fs_info->tree_root,
- btrfs_root_bytenr(&ri),
- btrfs_level_size(root,
- btrfs_root_level(&ri)), 0);
- add_root_to_pending(buf, &extent_cache, &pending,
- &seen, &nodes, &found_key);
- free_extent_buffer(buf);
+ if (btrfs_disk_key_objectid(&ri.drop_progress) == 0) {
+ buf = read_tree_block(root->fs_info->tree_root,
+ btrfs_root_bytenr(&ri),
+ btrfs_level_size(root,
+ btrfs_root_level(&ri)),
+ 0);
+ if (!buf) {
+ ret = -EIO;
+ goto out;
+ }
+ add_root_to_pending(buf, &extent_cache,
+ &pending, &seen, &nodes,
+ &found_key);
+ free_extent_buffer(buf);
+ } else {
+ struct dropping_root_item_record *dri_rec;
+ dri_rec = malloc(sizeof(*dri_rec));
+ if (!dri_rec) {
+ perror("malloc");
+ exit(1);
+ }
+ memcpy(&dri_rec->ri, &ri, sizeof(ri));
+ memcpy(&dri_rec->found_key, &found_key,
+ sizeof(found_key));
+ list_add_tail(&dri_rec->list, &dropping_trees);
+ }
}
path.slots[0]++;
}
- btrfs_release_path(root, &path);
- while(1) {
- ret = run_next_block(root, bits, bits_nr, &last, &pending,
- &seen, &reada, &nodes, &extent_cache,
- &chunk_cache, &dev_cache,
- &block_group_cache, &dev_extent_cache);
+ btrfs_release_path(&path);
+ while (1) {
+ ret = run_next_block(trans, root, bits, bits_nr, &last,
+ &pending, &seen, &reada, &nodes,
+ &extent_cache, &chunk_cache, &dev_cache,
+ &block_group_cache, &dev_extent_cache,
+ NULL);
if (ret != 0)
break;
}
- ret = check_extent_refs(trans, root, &extent_cache, repair);
+ while (!list_empty(&dropping_trees)) {
+ struct dropping_root_item_record *rec;
+ struct extent_buffer *buf;
+ rec = list_entry(dropping_trees.next,
+ struct dropping_root_item_record, list);
+ last = 0;
+ if (!bits) {
+ perror("realloc");
+ exit(1);
+ }
+ buf = read_tree_block(root->fs_info->tree_root,
+ btrfs_root_bytenr(&rec->ri),
+ btrfs_level_size(root,
+ btrfs_root_level(&rec->ri)), 0);
+ if (!buf) {
+ ret = -EIO;
+ goto out;
+ }
+ add_root_to_pending(buf, &extent_cache, &pending,
+ &seen, &nodes, &rec->found_key);
+ while (1) {
+ ret = run_next_block(trans, root, bits, bits_nr, &last,
+ &pending, &seen, &reada,
+ &nodes, &extent_cache,
+ &chunk_cache, &dev_cache,
+ &block_group_cache,
+ &dev_extent_cache,
+ &rec->ri);
+ if (ret != 0)
+ break;
+ }
+ free_extent_buffer(buf);
+ list_del(&rec->list);
+ free(rec);
+ }
+
+ if (ret >= 0)
+ ret = check_extent_refs(trans, root, &extent_cache);
if (ret == -EAGAIN) {
ret = btrfs_commit_transaction(trans, root);
if (ret)
ret = err;
if (trans) {
- int err;
-
err = btrfs_commit_transaction(trans, root);
if (!ret)
ret = err;
free_device_cache_tree(&dev_cache);
free_block_group_tree(&block_group_cache);
free_device_extent_tree(&dev_extent_cache);
+ free_extent_cache_tree(&seen);
+ free_extent_cache_tree(&pending);
+ free_extent_cache_tree(&reada);
+ free_extent_cache_tree(&nodes);
return ret;
}
+static int btrfs_fsck_reinit_root(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root, int overwrite)
+{
+ struct extent_buffer *c;
+ struct extent_buffer *old = root->node;
+ int level;
+ int ret;
+ struct btrfs_disk_key disk_key = {0,0,0};
+
+ level = 0;
+
+ if (overwrite) {
+ c = old;
+ extent_buffer_get(c);
+ goto init;
+ }
+ c = btrfs_alloc_free_block(trans, root,
+ btrfs_level_size(root, 0),
+ root->root_key.objectid,
+ &disk_key, level, 0, 0);
+ if (IS_ERR(c)) {
+ c = old;
+ extent_buffer_get(c);
+ overwrite = 1;
+ }
+init:
+ memset_extent_buffer(c, 0, 0, sizeof(struct btrfs_header));
+ btrfs_set_header_level(c, level);
+ btrfs_set_header_bytenr(c, c->start);
+ btrfs_set_header_generation(c, trans->transid);
+ btrfs_set_header_backref_rev(c, BTRFS_MIXED_BACKREF_REV);
+ btrfs_set_header_owner(c, root->root_key.objectid);
+
+ write_extent_buffer(c, root->fs_info->fsid,
+ btrfs_header_fsid(), BTRFS_FSID_SIZE);
+
+ write_extent_buffer(c, root->fs_info->chunk_tree_uuid,
+ btrfs_header_chunk_tree_uuid(c),
+ BTRFS_UUID_SIZE);
+
+ btrfs_mark_buffer_dirty(c);
+ /*
+ * this case can happen in the following case:
+ *
+ * 1.overwrite previous root.
+ *
+ * 2.reinit reloc data root, this is because we skip pin
+ * down reloc data tree before which means we can allocate
+ * same block bytenr here.
+ */
+ if (old->start == c->start) {
+ btrfs_set_root_generation(&root->root_item,
+ trans->transid);
+ root->root_item.level = btrfs_header_level(root->node);
+ ret = btrfs_update_root(trans, root->fs_info->tree_root,
+ &root->root_key, &root->root_item);
+ if (ret) {
+ free_extent_buffer(c);
+ return ret;
+ }
+ }
+ free_extent_buffer(old);
+ root->node = c;
+ add_root_to_dirty_list(root);
+ return 0;
+}
+
static int pin_down_tree_blocks(struct btrfs_fs_info *fs_info,
struct extent_buffer *eb, int tree_root)
{
static int reset_block_groups(struct btrfs_fs_info *fs_info)
{
+ struct btrfs_block_group_cache *cache;
struct btrfs_path *path;
struct extent_buffer *leaf;
struct btrfs_chunk *chunk;
struct btrfs_key key;
int ret;
+ u64 start;
path = btrfs_alloc_path();
if (!path)
btrfs_chunk_type(leaf, chunk),
key.objectid, key.offset,
btrfs_chunk_length(leaf, chunk));
+ set_extent_dirty(&fs_info->free_space_cache, key.offset,
+ key.offset + btrfs_chunk_length(leaf, chunk),
+ GFP_NOFS);
path->slots[0]++;
}
+ start = 0;
+ while (1) {
+ cache = btrfs_lookup_first_block_group(fs_info, start);
+ if (!cache)
+ break;
+ cache->cached = 1;
+ start = cache->key.objectid + cache->key.offset;
+ }
btrfs_free_path(path);
return 0;
if (ret) {
if (ret > 0)
ret = 0;
- goto out;
+ if (!ret)
+ goto reinit_data_reloc;
+ else
+ goto out;
}
ret = btrfs_del_item(trans, root, path);
if (ret)
goto out;
- btrfs_release_path(root, path);
+ btrfs_release_path(path);
key.objectid = BTRFS_TREE_RELOC_OBJECTID;
key.type = BTRFS_ROOT_ITEM_KEY;
goto out;
}
key.offset++;
- btrfs_release_path(root, path);
+ btrfs_release_path(path);
found = 0;
ret = btrfs_search_slot(trans, root, &key, path,
if (ret)
goto out;
}
- btrfs_release_path(root, path);
+ btrfs_release_path(path);
+reinit_data_reloc:
key.objectid = BTRFS_DATA_RELOC_TREE_OBJECTID;
key.type = BTRFS_ROOT_ITEM_KEY;
key.offset = (u64)-1;
extent_buffer_get(root->node);
}
ret = btrfs_fsck_reinit_root(trans, root, 0);
+ if (ret)
+ goto out;
+ ret = btrfs_make_root_dir(trans, root, BTRFS_FIRST_FREE_OBJECTID);
out:
btrfs_free_path(path);
return ret;
}
-static int reinit_extent_tree(struct btrfs_fs_info *fs_info)
+static int reinit_extent_tree(struct btrfs_trans_handle *trans,
+ struct btrfs_fs_info *fs_info)
{
- struct btrfs_trans_handle *trans;
u64 start = 0;
int ret;
return -EINVAL;
}
- trans = btrfs_start_transaction(fs_info->extent_root, 1);
- if (IS_ERR(trans)) {
- fprintf(stderr, "Error starting transaction\n");
- return PTR_ERR(trans);
- }
-
/*
* first we need to walk all of the trees except the extent tree and pin
* down the bytes that are in use so we don't overwrite any existing
}
/* Ok we can allocate now, reinit the extent root */
- ret = btrfs_fsck_reinit_root(trans, fs_info->extent_root, 1);
+ ret = btrfs_fsck_reinit_root(trans, fs_info->extent_root, 0);
if (ret) {
fprintf(stderr, "extent root initialization failed\n");
/*
return ret;
}
- ret = reset_balance(trans, fs_info);
- if (ret) {
- fprintf(stderr, "error reseting the pending balance\n");
- return ret;
- }
-
/*
* Now we have all the in-memory block groups setup so we can make
* allocations properly, and the metadata we care about is safe since we
btrfs_extent_post_op(trans, fs_info->extent_root);
}
- /*
- * Ok now we commit and run the normal fsck, which will add extent
- * entries for all of the items it finds.
- */
- return btrfs_commit_transaction(trans, fs_info->extent_root);
+ ret = reset_balance(trans, fs_info);
+ if (ret)
+ fprintf(stderr, "error reseting the pending balance\n");
+
+ return ret;
+}
+
+static int recow_extent_buffer(struct btrfs_root *root, struct extent_buffer *eb)
+{
+ struct btrfs_path *path;
+ struct btrfs_trans_handle *trans;
+ struct btrfs_key key;
+ int ret;
+
+ printf("Recowing metadata block %llu\n", eb->start);
+ key.objectid = btrfs_header_owner(eb);
+ key.type = BTRFS_ROOT_ITEM_KEY;
+ key.offset = (u64)-1;
+
+ root = btrfs_read_fs_root(root->fs_info, &key);
+ if (IS_ERR(root)) {
+ fprintf(stderr, "Couldn't find owner root %llu\n",
+ key.objectid);
+ return PTR_ERR(root);
+ }
+
+ path = btrfs_alloc_path();
+ if (!path)
+ return -ENOMEM;
+
+ trans = btrfs_start_transaction(root, 1);
+ if (IS_ERR(trans)) {
+ btrfs_free_path(path);
+ return PTR_ERR(trans);
+ }
+
+ path->lowest_level = btrfs_header_level(eb);
+ if (path->lowest_level)
+ btrfs_node_key_to_cpu(eb, &key, 0);
+ else
+ btrfs_item_key_to_cpu(eb, &key, 0);
+
+ ret = btrfs_search_slot(trans, root, &key, path, 0, 1);
+ btrfs_commit_transaction(trans, root);
+ btrfs_free_path(path);
+ return ret;
+}
+
+static int delete_bad_item(struct btrfs_root *root, struct bad_item *bad)
+{
+ struct btrfs_path *path;
+ struct btrfs_trans_handle *trans;
+ struct btrfs_key key;
+ int ret;
+
+ printf("Deleting bad item [%llu,%u,%llu]\n", bad->key.objectid,
+ bad->key.type, bad->key.offset);
+ key.objectid = bad->root_id;
+ key.type = BTRFS_ROOT_ITEM_KEY;
+ key.offset = (u64)-1;
+
+ root = btrfs_read_fs_root(root->fs_info, &key);
+ if (IS_ERR(root)) {
+ fprintf(stderr, "Couldn't find owner root %llu\n",
+ key.objectid);
+ return PTR_ERR(root);
+ }
+
+ path = btrfs_alloc_path();
+ if (!path)
+ return -ENOMEM;
+
+ trans = btrfs_start_transaction(root, 1);
+ if (IS_ERR(trans)) {
+ btrfs_free_path(path);
+ return PTR_ERR(trans);
+ }
+
+ ret = btrfs_search_slot(trans, root, &bad->key, path, -1, 1);
+ if (ret) {
+ if (ret > 0)
+ ret = 0;
+ goto out;
+ }
+ ret = btrfs_del_item(trans, root, path);
+out:
+ btrfs_commit_transaction(trans, root);
+ btrfs_free_path(path);
+ return ret;
}
static struct option long_options[] = {
{ "repair", 0, NULL, 0 },
{ "init-csum-tree", 0, NULL, 0 },
{ "init-extent-tree", 0, NULL, 0 },
- { 0, 0, 0, 0}
+ { "check-data-csum", 0, NULL, 0 },
+ { "backup", 0, NULL, 0 },
+ { "subvol-extents", no_argument, NULL, 'E' },
+ { "qgroup-report", 0, NULL, 'Q' },
+ { NULL, 0, NULL, 0}
};
const char * const cmd_check_usage[] = {
"Check an unmounted btrfs filesystem.",
"",
"-s|--super <superblock> use this superblock copy",
+ "-b|--backup use the backup root copy",
"--repair try to repair the filesystem",
"--init-csum-tree create a new CRC tree",
"--init-extent-tree create a new extent tree",
+ "--check-data-csum verify checkums of data blocks",
+ "--qgroup-report print a report on qgroup consistency",
+ "--subvol-extents print subvolume extents and sharing state",
NULL
};
struct btrfs_root *root;
struct btrfs_fs_info *info;
u64 bytenr = 0;
- char uuidbuf[37];
+ u64 subvolid = 0;
+ char uuidbuf[BTRFS_UUID_UNPARSED_SIZE];
int ret;
- int num;
- int repair = 0;
+ u64 num;
int option_index = 0;
int init_csum_tree = 0;
- int init_extent_tree = 0;
- int rw = 0;
+ int qgroup_report = 0;
+ enum btrfs_open_ctree_flags ctree_flags =
+ OPEN_CTREE_PARTIAL | OPEN_CTREE_EXCLUSIVE;
while(1) {
int c;
- c = getopt_long(argc, argv, "as:", long_options,
+ c = getopt_long(argc, argv, "as:b", long_options,
&option_index);
if (c < 0)
break;
switch(c) {
case 'a': /* ignored */ break;
+ case 'b':
+ ctree_flags |= OPEN_CTREE_BACKUP_ROOT;
+ break;
case 's':
- num = atol(optarg);
- bytenr = btrfs_sb_offset(num);
- printf("using SB copy %d, bytenr %llu\n", num,
+ num = arg_strtou64(optarg);
+ if (num >= BTRFS_SUPER_MIRROR_MAX) {
+ fprintf(stderr,
+ "ERROR: super mirror should be less than: %d\n",
+ BTRFS_SUPER_MIRROR_MAX);
+ exit(1);
+ }
+ bytenr = btrfs_sb_offset(((int)num));
+ printf("using SB copy %llu, bytenr %llu\n", num,
(unsigned long long)bytenr);
break;
+ case 'Q':
+ qgroup_report = 1;
+ break;
+ case 'E':
+ subvolid = arg_strtou64(optarg);
+ break;
case '?':
case 'h':
usage(cmd_check_usage);
if (option_index == 1) {
printf("enabling repair mode\n");
repair = 1;
- rw = 1;
+ ctree_flags |= OPEN_CTREE_WRITES;
} else if (option_index == 2) {
printf("Creating a new CRC tree\n");
init_csum_tree = 1;
- rw = 1;
+ repair = 1;
+ ctree_flags |= OPEN_CTREE_WRITES;
} else if (option_index == 3) {
init_extent_tree = 1;
- rw = 1;
+ ctree_flags |= (OPEN_CTREE_WRITES |
+ OPEN_CTREE_NO_BLOCK_GROUPS);
repair = 1;
+ } else if (option_index == 4) {
+ check_data_csum = 1;
}
-
}
argc = argc - optind;
- if (argc != 1)
+ if (check_argc_exact(argc, 1))
usage(cmd_check_usage);
radix_tree_init();
if((ret = check_mounted(argv[optind])) < 0) {
fprintf(stderr, "Could not check mount status: %s\n", strerror(-ret));
- return ret;
+ goto err_out;
} else if(ret) {
fprintf(stderr, "%s is currently mounted. Aborting.\n", argv[optind]);
- return -EBUSY;
+ ret = -EBUSY;
+ goto err_out;
}
- info = open_ctree_fs_info(argv[optind], bytenr, 0, rw, 1);
+ info = open_ctree_fs_info(argv[optind], bytenr, 0, ctree_flags);
if (!info) {
fprintf(stderr, "Couldn't open file system\n");
- return -EIO;
+ ret = -EIO;
+ goto err_out;
}
+ root = info->fs_root;
uuid_unparse(info->super_copy->fsid, uuidbuf);
+ if (qgroup_report) {
+ printf("Print quota groups for %s\nUUID: %s\n", argv[optind],
+ uuidbuf);
+ ret = qgroup_verify_all(info);
+ if (ret == 0)
+ print_qgroup_report(1);
+ goto close_out;
+ }
+ if (subvolid) {
+ printf("Print extent state for subvolume %llu on %s\nUUID: %s\n",
+ subvolid, argv[optind], uuidbuf);
+ ret = print_extent_state(info, subvolid);
+ goto close_out;
+ }
printf("Checking filesystem on %s\nUUID: %s\n", argv[optind], uuidbuf);
if (!extent_buffer_uptodate(info->tree_root->node) ||
!extent_buffer_uptodate(info->dev_root->node) ||
- !extent_buffer_uptodate(info->extent_root->node) ||
!extent_buffer_uptodate(info->chunk_root->node)) {
fprintf(stderr, "Critical roots corrupted, unable to fsck the FS\n");
- return -EIO;
+ ret = -EIO;
+ goto close_out;
}
- root = info->fs_root;
-
- if (init_extent_tree) {
- printf("Creating a new extent tree\n");
- ret = reinit_extent_tree(info);
- if (ret)
- return ret;
- }
- fprintf(stderr, "checking extents\n");
- if (init_csum_tree) {
+ if (init_extent_tree || init_csum_tree) {
struct btrfs_trans_handle *trans;
- fprintf(stderr, "Reinit crc root\n");
- trans = btrfs_start_transaction(info->csum_root, 1);
+ trans = btrfs_start_transaction(info->extent_root, 0);
if (IS_ERR(trans)) {
fprintf(stderr, "Error starting transaction\n");
- return PTR_ERR(trans);
+ ret = PTR_ERR(trans);
+ goto close_out;
}
- ret = btrfs_fsck_reinit_root(trans, info->csum_root, 0);
- if (ret) {
- fprintf(stderr, "crc root initialization failed\n");
- return -EIO;
+ if (init_extent_tree) {
+ printf("Creating a new extent tree\n");
+ ret = reinit_extent_tree(trans, info);
+ if (ret)
+ goto close_out;
}
- ret = btrfs_commit_transaction(trans, root);
+ if (init_csum_tree) {
+ fprintf(stderr, "Reinit crc root\n");
+ ret = btrfs_fsck_reinit_root(trans, info->csum_root, 0);
+ if (ret) {
+ fprintf(stderr, "crc root initialization failed\n");
+ ret = -EIO;
+ goto close_out;
+ }
+ }
+ /*
+ * Ok now we commit and run the normal fsck, which will add
+ * extent entries for all of the items it finds.
+ */
+ ret = btrfs_commit_transaction(trans, info->extent_root);
if (ret)
- exit(1);
- goto out;
+ goto close_out;
}
- ret = check_chunks_and_extents(root, repair);
+ if (!extent_buffer_uptodate(info->extent_root->node)) {
+ fprintf(stderr, "Critical roots corrupted, unable to fsck the FS\n");
+ ret = -EIO;
+ goto close_out;
+ }
+
+ fprintf(stderr, "checking extents\n");
+ ret = check_chunks_and_extents(root);
if (ret)
fprintf(stderr, "Errors found in extent allocation tree or chunk allocation\n");
if (ret)
goto out;
+ /*
+ * We used to have to have these hole extents in between our real
+ * extents so if we don't have this flag set we need to make sure there
+ * are no gaps in the file extents for inodes, otherwise we can just
+ * ignore it when this happens.
+ */
+ no_holes = btrfs_fs_incompat(root->fs_info,
+ BTRFS_FEATURE_INCOMPAT_NO_HOLES);
fprintf(stderr, "checking fs roots\n");
ret = check_fs_roots(root, &root_cache);
if (ret)
fprintf(stderr, "checking root refs\n");
ret = check_root_refs(root, &root_cache);
-out:
- free_root_recs_tree(&root_cache);
- close_ctree(root);
+ if (ret)
+ goto out;
+ while (repair && !list_empty(&root->fs_info->recow_ebs)) {
+ struct extent_buffer *eb;
+
+ eb = list_first_entry(&root->fs_info->recow_ebs,
+ struct extent_buffer, recow);
+ ret = recow_extent_buffer(root, eb);
+ if (ret)
+ break;
+ }
+
+ while (!list_empty(&delete_items)) {
+ struct bad_item *bad;
+
+ bad = list_first_entry(&delete_items, struct bad_item, list);
+ list_del_init(&bad->list);
+ if (repair)
+ ret = delete_bad_item(root, bad);
+ free(bad);
+ }
+
+ if (info->quota_enabled) {
+ int err;
+ fprintf(stderr, "checking quota groups\n");
+ err = qgroup_verify_all(info);
+ if (err)
+ goto out;
+ }
+
+ if (!list_empty(&root->fs_info->recow_ebs)) {
+ fprintf(stderr, "Transid errors in file system\n");
+ ret = 1;
+ }
+out:
+ print_qgroup_report(0);
if (found_old_backref) { /*
* there was a disk format change when mixed
* backref was in testing tree. The old format
(unsigned long long)data_bytes_allocated,
(unsigned long long)data_bytes_referenced);
printf("%s\n", BTRFS_BUILD_VERSION);
+
+ free_root_recs_tree(&root_cache);
+close_out:
+ close_ctree(root);
+err_out:
return ret;
}
projects / platform / upstream / btrfs-progs.git / blobdiff