*/
atomic_inc(&cb->pending_bios);
ret = btrfs_bio_wq_end_io(root->fs_info, bio, 0);
- BUG_ON(ret);
+ BUG_ON(ret); /* -ENOMEM */
if (!skip_sum) {
ret = btrfs_csum_one_bio(root, inode, bio,
start, 1);
- BUG_ON(ret);
+ BUG_ON(ret); /* -ENOMEM */
}
ret = btrfs_map_bio(root, WRITE, bio, 0, 1);
- BUG_ON(ret);
+ BUG_ON(ret); /* -ENOMEM */
bio_put(bio);
bio_get(bio);
ret = btrfs_bio_wq_end_io(root->fs_info, bio, 0);
- BUG_ON(ret);
+ BUG_ON(ret); /* -ENOMEM */
if (!skip_sum) {
ret = btrfs_csum_one_bio(root, inode, bio, start, 1);
- BUG_ON(ret);
+ BUG_ON(ret); /* -ENOMEM */
}
ret = btrfs_map_bio(root, WRITE, bio, 0, 1);
- BUG_ON(ret);
+ BUG_ON(ret); /* -ENOMEM */
bio_put(bio);
return 0;
bio_get(comp_bio);
ret = btrfs_bio_wq_end_io(root->fs_info, comp_bio, 0);
- BUG_ON(ret);
+ BUG_ON(ret); /* -ENOMEM */
/*
* inc the count before we submit the bio so
if (!(BTRFS_I(inode)->flags & BTRFS_INODE_NODATASUM)) {
ret = btrfs_lookup_bio_sums(root, inode,
comp_bio, sums);
- BUG_ON(ret);
+ BUG_ON(ret); /* -ENOMEM */
}
sums += (comp_bio->bi_size + root->sectorsize - 1) /
root->sectorsize;
ret = btrfs_map_bio(root, READ, comp_bio,
mirror_num, 0);
- BUG_ON(ret);
+ BUG_ON(ret); /* -ENOMEM */
bio_put(comp_bio);
bio_get(comp_bio);
ret = btrfs_bio_wq_end_io(root->fs_info, comp_bio, 0);
- BUG_ON(ret);
+ BUG_ON(ret); /* -ENOMEM */
if (!(BTRFS_I(inode)->flags & BTRFS_INODE_NODATASUM)) {
ret = btrfs_lookup_bio_sums(root, inode, comp_bio, sums);
- BUG_ON(ret);
+ BUG_ON(ret); /* -ENOMEM */
}
ret = btrfs_map_bio(root, READ, comp_bio, mirror_num, 0);
- BUG_ON(ret);
+ BUG_ON(ret); /* -ENOMEM */
bio_put(comp_bio);
return 0;
root->root_key.objectid == BTRFS_TREE_RELOC_OBJECTID) &&
!(flags & BTRFS_BLOCK_FLAG_FULL_BACKREF)) {
ret = btrfs_inc_ref(trans, root, buf, 1, 1);
- BUG_ON(ret);
+ BUG_ON(ret); /* -ENOMEM */
if (root->root_key.objectid ==
BTRFS_TREE_RELOC_OBJECTID) {
ret = btrfs_dec_ref(trans, root, buf, 0, 1);
- BUG_ON(ret);
+ BUG_ON(ret); /* -ENOMEM */
ret = btrfs_inc_ref(trans, root, cow, 1, 1);
- BUG_ON(ret);
+ BUG_ON(ret); /* -ENOMEM */
}
new_flags |= BTRFS_BLOCK_FLAG_FULL_BACKREF;
} else {
ret = btrfs_inc_ref(trans, root, cow, 1, 1);
else
ret = btrfs_inc_ref(trans, root, cow, 0, 1);
- BUG_ON(ret);
+ BUG_ON(ret); /* -ENOMEM */
}
if (new_flags != 0) {
ret = btrfs_set_disk_extent_flags(trans, root,
ret = btrfs_inc_ref(trans, root, cow, 1, 1);
else
ret = btrfs_inc_ref(trans, root, cow, 0, 1);
- BUG_ON(ret);
+ BUG_ON(ret); /* -ENOMEM */
ret = btrfs_dec_ref(trans, root, buf, 1, 1);
- BUG_ON(ret);
+ BUG_ON(ret); /* -ENOMEM */
}
clean_tree_block(trans, root, buf);
*last_ref = 1;
ret = update_ref_for_cow(trans, root, buf, cow, &last_ref);
if (ret) {
- btrfs_std_error(root->fs_info, ret);
+ btrfs_abort_transaction(trans, root, ret);
return ret;
}
path->nodes[1], slot - 1, &left);
if (ret) {
/* we hit -ENOSPC, but it isn't fatal here */
- ret = 1;
+ if (ret == -ENOSPC)
+ ret = 1;
goto out;
}
}
btrfs_set_path_blocking(path);
cur = read_node_slot(root, cur, slot);
- BUG_ON(!cur);
+ BUG_ON(!cur); /* -ENOMEM */
btrfs_tree_read_lock(cur);
return NULL;
}
+/* Will return either the node or PTR_ERR(-ENOMEM) */
static struct btrfs_delayed_node *btrfs_get_or_create_delayed_node(
struct inode *inode)
{
return 0;
}
-/* Called when committing the transaction. */
+/*
+ * Called when committing the transaction.
+ * Returns 0 on success.
+ * Returns < 0 on error and returns with an aborted transaction with any
+ * outstanding delayed items cleaned up.
+ */
int btrfs_run_delayed_items(struct btrfs_trans_handle *trans,
struct btrfs_root *root)
{
+ struct btrfs_root *curr_root = root;
struct btrfs_delayed_root *delayed_root;
struct btrfs_delayed_node *curr_node, *prev_node;
struct btrfs_path *path;
struct btrfs_block_rsv *block_rsv;
int ret = 0;
+ if (trans->aborted)
+ return -EIO;
+
path = btrfs_alloc_path();
if (!path)
return -ENOMEM;
curr_node = btrfs_first_delayed_node(delayed_root);
while (curr_node) {
- root = curr_node->root;
- ret = btrfs_insert_delayed_items(trans, path, root,
+ curr_root = curr_node->root;
+ ret = btrfs_insert_delayed_items(trans, path, curr_root,
curr_node);
if (!ret)
- ret = btrfs_delete_delayed_items(trans, path, root,
- curr_node);
+ ret = btrfs_delete_delayed_items(trans, path,
+ curr_root, curr_node);
if (!ret)
- ret = btrfs_update_delayed_inode(trans, root, path,
- curr_node);
+ ret = btrfs_update_delayed_inode(trans, curr_root,
+ path, curr_node);
if (ret) {
btrfs_release_delayed_node(curr_node);
+ btrfs_abort_transaction(trans, root, ret);
break;
}
btrfs_free_path(path);
trans->block_rsv = block_rsv;
+
return ret;
}
btrfs_wq_run_delayed_node(delayed_root, root, 0);
}
+/* Will return 0 or -ENOMEM */
int btrfs_insert_delayed_dir_index(struct btrfs_trans_handle *trans,
struct btrfs_root *root, const char *name,
int name_len, struct inode *dir,
* 'location' is the key to stuff into the directory item, 'type' is the
* type of the inode we're pointing to, and 'index' is the sequence number
* to use for the second index (if one is created).
+ * Will return 0 or -ENOMEM
*/
int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
*root, const char *name, int name_len,
*/
u64 bio_offset;
struct btrfs_work work;
+ int error;
};
/*
u64 found_start;
unsigned long len;
struct extent_buffer *eb;
- int ret;
+ int ret = -EIO;
tree = &BTRFS_I(page->mapping->host)->io_tree;
eb = alloc_extent_buffer(tree, start, len, page);
if (eb == NULL) {
WARN_ON(1);
+ ret = -ENOMEM;
goto out;
}
ret = btree_read_extent_buffer_pages(root, eb, start + PAGE_CACHE_SIZE,
btrfs_header_generation(eb));
- BUG_ON(ret);
+ if (ret) {
+ btrfs_printk(root->fs_info, KERN_WARNING
+ "Failed to checksum dirty buffer @ %llu[%lu]\n",
+ start, len);
+ goto err;
+ }
WARN_ON(!btrfs_header_flag(eb, BTRFS_HEADER_FLAG_WRITTEN));
+ ret = -EIO;
found_start = btrfs_header_bytenr(eb);
if (found_start != start) {
WARN_ON(1);
goto err;
}
csum_tree_block(root, eb, 0);
+ ret = 0;
err:
free_extent_buffer(eb);
out:
- return 0;
+ return ret;
}
static int check_tree_block_fsid(struct btrfs_root *root,
static void run_one_async_start(struct btrfs_work *work)
{
struct async_submit_bio *async;
+ int ret;
async = container_of(work, struct async_submit_bio, work);
- async->submit_bio_start(async->inode, async->rw, async->bio,
- async->mirror_num, async->bio_flags,
- async->bio_offset);
+ ret = async->submit_bio_start(async->inode, async->rw, async->bio,
+ async->mirror_num, async->bio_flags,
+ async->bio_offset);
+ if (ret)
+ async->error = ret;
}
static void run_one_async_done(struct btrfs_work *work)
waitqueue_active(&fs_info->async_submit_wait))
wake_up(&fs_info->async_submit_wait);
+ /* If an error occured we just want to clean up the bio and move on */
+ if (async->error) {
+ bio_endio(async->bio, async->error);
+ return;
+ }
+
async->submit_bio_done(async->inode, async->rw, async->bio,
async->mirror_num, async->bio_flags,
async->bio_offset);
async->bio_flags = bio_flags;
async->bio_offset = bio_offset;
+ async->error = 0;
+
atomic_inc(&fs_info->nr_async_submits);
if (rw & REQ_SYNC)
struct bio_vec *bvec = bio->bi_io_vec;
int bio_index = 0;
struct btrfs_root *root;
+ int ret = 0;
WARN_ON(bio->bi_vcnt <= 0);
while (bio_index < bio->bi_vcnt) {
root = BTRFS_I(bvec->bv_page->mapping->host)->root;
- csum_dirty_buffer(root, bvec->bv_page);
+ ret = csum_dirty_buffer(root, bvec->bv_page);
+ if (ret)
+ break;
bio_index++;
bvec++;
}
- return 0;
+ return ret;
}
static int __btree_submit_bio_start(struct inode *inode, int rw,
* when we're called for a write, we're already in the async
* submission context. Just jump into btrfs_map_bio
*/
- btree_csum_one_bio(bio);
- return 0;
+ return btree_csum_one_bio(bio);
}
static int __btree_submit_bio_done(struct inode *inode, int rw, struct bio *bio,
root->node = read_tree_block(root, btrfs_root_bytenr(&root->root_item),
blocksize, generation);
root->commit_root = btrfs_root_node(root);
- BUG_ON(!root->node);
+ BUG_ON(!root->node); /* -ENOMEM */
out:
if (location->objectid != BTRFS_TREE_LOG_OBJECTID) {
root->ref_cows = 1;
u64 transid;
unsigned long now;
unsigned long delay;
- int ret;
do {
delay = HZ * 30;
transid = cur->transid;
spin_unlock(&root->fs_info->trans_lock);
+ /* If the file system is aborted, this will always fail. */
trans = btrfs_join_transaction(root);
- BUG_ON(IS_ERR(trans));
+ if (IS_ERR(trans))
+ goto sleep;
if (transid == trans->transid) {
- ret = btrfs_commit_transaction(trans, root);
- BUG_ON(ret);
+ btrfs_commit_transaction(trans, root);
} else {
btrfs_end_transaction(trans, root);
}
chunk_root->node = read_tree_block(chunk_root,
btrfs_super_chunk_root(disk_super),
blocksize, generation);
- BUG_ON(!chunk_root->node);
+ BUG_ON(!chunk_root->node); /* -ENOMEM */
if (!test_bit(EXTENT_BUFFER_UPTODATE, &chunk_root->node->bflags)) {
printk(KERN_WARNING "btrfs: failed to read chunk root on %s\n",
sb->s_id);
log_tree_root->node = read_tree_block(tree_root, bytenr,
blocksize,
generation + 1);
+ /* returns with log_tree_root freed on success */
ret = btrfs_recover_log_trees(log_tree_root);
- BUG_ON(ret);
+ if (ret) {
+ btrfs_error(tree_root->fs_info, ret,
+ "Failed to recover log tree");
+ free_extent_buffer(log_tree_root->node);
+ kfree(log_tree_root);
+ goto fail_trans_kthread;
+ }
if (sb->s_flags & MS_RDONLY) {
- ret = btrfs_commit_super(tree_root);
- BUG_ON(ret);
+ ret = btrfs_commit_super(tree_root);
+ if (ret)
+ goto fail_trans_kthread;
}
}
ret = btrfs_find_orphan_roots(tree_root);
- BUG_ON(ret);
+ if (ret)
+ goto fail_trans_kthread;
if (!(sb->s_flags & MS_RDONLY)) {
ret = btrfs_cleanup_fs_roots(fs_info);
- BUG_ON(ret);
+ if (ret) {
+ }
ret = btrfs_recover_relocation(tree_root);
if (ret < 0) {
if (total_errors > max_errors) {
printk(KERN_ERR "btrfs: %d errors while writing supers\n",
total_errors);
+
+ /* This shouldn't happen. FUA is masked off if unsupported */
BUG();
}
}
mutex_unlock(&root->fs_info->fs_devices->device_list_mutex);
if (total_errors > max_errors) {
- printk(KERN_ERR "btrfs: %d errors while writing supers\n",
- total_errors);
- BUG();
+ btrfs_error(root->fs_info, -EIO,
+ "%d errors while writing supers", total_errors);
+ return -EIO;
}
return 0;
}
if (IS_ERR(trans))
return PTR_ERR(trans);
ret = btrfs_commit_transaction(trans, root);
- BUG_ON(ret);
+ if (ret)
+ return ret;
/* run commit again to drop the original snapshot */
trans = btrfs_join_transaction(root);
if (IS_ERR(trans))
return PTR_ERR(trans);
- btrfs_commit_transaction(trans, root);
+ ret = btrfs_commit_transaction(trans, root);
+ if (ret)
+ return ret;
ret = btrfs_write_and_wait_transaction(NULL, root);
- BUG_ON(ret);
+ if (ret) {
+ btrfs_error(root->fs_info, ret,
+ "Failed to sync btree inode to disk.");
+ return ret;
+ }
ret = write_ctree_super(NULL, root, 0);
return ret;
spin_unlock(&root->fs_info->ordered_extent_lock);
}
-static int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans,
- struct btrfs_root *root)
+int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans,
+ struct btrfs_root *root)
{
struct rb_node *node;
struct btrfs_delayed_ref_root *delayed_refs;
delayed_refs = &trans->delayed_refs;
+again:
spin_lock(&delayed_refs->lock);
if (delayed_refs->num_entries == 0) {
spin_unlock(&delayed_refs->lock);
struct btrfs_delayed_ref_head *head;
head = btrfs_delayed_node_to_head(ref);
+ spin_unlock(&delayed_refs->lock);
mutex_lock(&head->mutex);
kfree(head->extent_op);
delayed_refs->num_heads--;
delayed_refs->num_heads_ready--;
list_del_init(&head->cluster);
mutex_unlock(&head->mutex);
+ btrfs_put_delayed_ref(ref);
+ goto again;
}
-
spin_unlock(&delayed_refs->lock);
btrfs_put_delayed_ref(ref);
return 0;
}
+static int btree_writepage_io_failed_hook(struct bio *bio, struct page *page,
+ u64 start, u64 end,
+ struct extent_state *state)
+{
+ struct super_block *sb = page->mapping->host->i_sb;
+ struct btrfs_fs_info *fs_info = btrfs_sb(sb);
+ btrfs_error(fs_info, -EIO,
+ "Error occured while writing out btree at %llu", start);
+ return -EIO;
+}
+
static struct extent_io_ops btree_extent_io_ops = {
.write_cache_pages_lock_hook = btree_lock_page_hook,
.readpage_end_io_hook = btree_readpage_end_io_hook,
.submit_bio_hook = btree_submit_bio_hook,
/* note we're sharing with inode.c for the merge bio hook */
.merge_bio_hook = btrfs_merge_bio_hook,
+ .writepage_io_failed_hook = btree_writepage_io_failed_hook,
};
if (ret < 0)
goto fail;
- BUG_ON(ret == 0);
+ BUG_ON(ret == 0); /* Key with offset of -1 found */
if (path->slots[0] == 0) {
ret = -ENOENT;
goto fail;
cache->bytes_super += stripe_len;
ret = add_excluded_extent(root, cache->key.objectid,
stripe_len);
- BUG_ON(ret);
+ BUG_ON(ret); /* -ENOMEM */
}
for (i = 0; i < BTRFS_SUPER_MIRROR_MAX; i++) {
ret = btrfs_rmap_block(&root->fs_info->mapping_tree,
cache->key.objectid, bytenr,
0, &logical, &nr, &stripe_len);
- BUG_ON(ret);
+ BUG_ON(ret); /* -ENOMEM */
while (nr--) {
cache->bytes_super += stripe_len;
ret = add_excluded_extent(root, logical[nr],
stripe_len);
- BUG_ON(ret);
+ BUG_ON(ret); /* -ENOMEM */
}
kfree(logical);
total_added += size;
ret = btrfs_add_free_space(block_group, start,
size);
- BUG_ON(ret);
+ BUG_ON(ret); /* -ENOMEM or logic error */
start = extent_end + 1;
} else {
break;
size = end - start;
total_added += size;
ret = btrfs_add_free_space(block_group, start, size);
- BUG_ON(ret);
+ BUG_ON(ret); /* -ENOMEM or logic error */
}
return total_added;
int ret = 0;
caching_ctl = kzalloc(sizeof(*caching_ctl), GFP_NOFS);
- BUG_ON(!caching_ctl);
+ if (!caching_ctl)
+ return -ENOMEM;
INIT_LIST_HEAD(&caching_ctl->list);
mutex_init(&caching_ctl->mutex);
ret = btrfs_next_leaf(root, path);
if (ret < 0)
return ret;
- BUG_ON(ret > 0);
+ BUG_ON(ret > 0); /* Corruption */
leaf = path->nodes[0];
}
btrfs_item_key_to_cpu(leaf, &found_key,
new_size + extra_size, 1);
if (ret < 0)
return ret;
- BUG_ON(ret);
+ BUG_ON(ret); /* Corruption */
btrfs_extend_item(trans, root, path, new_size);
err = ret;
goto out;
}
- BUG_ON(ret);
+ if (ret && !insert) {
+ err = -ENOENT;
+ goto out;
+ }
+ BUG_ON(ret); /* Corruption */
leaf = path->nodes[0];
item_size = btrfs_item_size_nr(leaf, path->slots[0]);
/* Tell the block device(s) that the sectors can be discarded */
ret = btrfs_map_block(&root->fs_info->mapping_tree, REQ_DISCARD,
bytenr, &num_bytes, &bbio, 0);
+ /* Error condition is -ENOMEM */
if (!ret) {
struct btrfs_bio_stripe *stripe = bbio->stripes;
int i;
if (!ret)
discarded_bytes += stripe->length;
else if (ret != -EOPNOTSUPP)
- break;
+ break; /* Logic errors or -ENOMEM, or -EIO but I don't know how that could happen JDM */
/*
* Just in case we get back EOPNOTSUPP for some reason,
return ret;
}
+/* Can return -ENOMEM */
int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
u64 bytenr, u64 num_bytes, u64 parent,
ret = insert_extent_backref(trans, root->fs_info->extent_root,
path, bytenr, parent, root_objectid,
owner, offset, refs_to_add);
- BUG_ON(ret);
+ if (ret)
+ btrfs_abort_transaction(trans, root, ret);
out:
btrfs_free_path(path);
return err;
int ret;
int err = 0;
+ if (trans->aborted)
+ return 0;
+
path = btrfs_alloc_path();
if (!path)
return -ENOMEM;
struct btrfs_delayed_extent_op *extent_op,
int insert_reserved)
{
- int ret;
+ int ret = 0;
+
+ if (trans->aborted)
+ return 0;
+
if (btrfs_delayed_ref_is_head(node)) {
struct btrfs_delayed_ref_head *head;
/*
ret = btrfs_del_csums(trans, root,
node->bytenr,
node->num_bytes);
- BUG_ON(ret);
}
}
mutex_unlock(&head->mutex);
- return 0;
+ return ret;
}
if (node->type == BTRFS_TREE_BLOCK_REF_KEY ||
return NULL;
}
+/*
+ * Returns 0 on success or if called with an already aborted transaction.
+ * Returns -ENOMEM or -EIO on failure and will abort the transaction.
+ */
static noinline int run_clustered_refs(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct list_head *cluster)
ret = run_delayed_extent_op(trans, root,
ref, extent_op);
- BUG_ON(ret);
kfree(extent_op);
+ if (ret) {
+ printk(KERN_DEBUG "btrfs: run_delayed_extent_op returned %d\n", ret);
+ return ret;
+ }
+
goto next;
}
ret = run_one_delayed_ref(trans, root, ref, extent_op,
must_insert_reserved);
- BUG_ON(ret);
btrfs_put_delayed_ref(ref);
kfree(extent_op);
count++;
+
+ if (ret) {
+ printk(KERN_DEBUG "btrfs: run_one_delayed_ref returned %d\n", ret);
+ return ret;
+ }
+
next:
do_chunk_alloc(trans, root->fs_info->extent_root,
2 * 1024 * 1024,
* 0, which means to process everything in the tree at the start
* of the run (but not newly added entries), or it can be some target
* number you'd like to process.
+ *
+ * Returns 0 on success or if called with an aborted transaction
+ * Returns <0 on error and aborts the transaction
*/
int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
struct btrfs_root *root, unsigned long count)
unsigned long num_refs = 0;
int consider_waiting;
+ /* We'll clean this up in btrfs_cleanup_transaction */
+ if (trans->aborted)
+ return 0;
+
if (root == root->fs_info->extent_root)
root = root->fs_info->tree_root;
}
ret = run_clustered_refs(trans, root, &cluster);
- BUG_ON(ret < 0);
+ if (ret < 0) {
+ spin_unlock(&delayed_refs->lock);
+ btrfs_abort_transaction(trans, root, ret);
+ return ret;
+ }
count -= min_t(unsigned long, ret, count);
ret = btrfs_search_slot(NULL, extent_root, &key, path, 0, 0);
if (ret < 0)
goto out;
- BUG_ON(ret == 0);
+ BUG_ON(ret == 0); /* Corruption */
ret = -ENOENT;
if (path->slots[0] == 0)
}
return 0;
fail:
- BUG();
return ret;
}
ret = btrfs_search_slot(trans, extent_root, &cache->key, path, 0, 1);
if (ret < 0)
goto fail;
- BUG_ON(ret);
+ BUG_ON(ret); /* Corruption */
leaf = path->nodes[0];
bi = btrfs_item_ptr_offset(leaf, path->slots[0]);
btrfs_mark_buffer_dirty(leaf);
btrfs_release_path(path);
fail:
- if (ret)
+ if (ret) {
+ btrfs_abort_transaction(trans, root, ret);
return ret;
+ }
return 0;
}
if (last == 0) {
err = btrfs_run_delayed_refs(trans, root,
(unsigned long)-1);
- BUG_ON(err);
+ if (err) /* File system offline */
+ goto out;
}
cache = btrfs_lookup_first_block_group(root->fs_info, last);
last = cache->key.objectid + cache->key.offset;
err = write_one_cache_group(trans, root, path, cache);
- BUG_ON(err);
+ if (err) /* File system offline */
+ goto out;
+
btrfs_put_block_group(cache);
}
if (last == 0) {
err = btrfs_run_delayed_refs(trans, root,
(unsigned long)-1);
- BUG_ON(err);
+ if (err) /* File system offline */
+ goto out;
}
cache = btrfs_lookup_first_block_group(root->fs_info, last);
continue;
}
- btrfs_write_out_cache(root, trans, cache, path);
+ err = btrfs_write_out_cache(root, trans, cache, path);
/*
* If we didn't have an error then the cache state is still
* NEED_WRITE, so we can set it to WRITTEN.
*/
- if (cache->disk_cache_state == BTRFS_DC_NEED_WRITE)
+ if (!err && cache->disk_cache_state == BTRFS_DC_NEED_WRITE)
cache->disk_cache_state = BTRFS_DC_WRITTEN;
last = cache->key.objectid + cache->key.offset;
btrfs_put_block_group(cache);
}
+out:
btrfs_free_path(path);
- return 0;
+ return err;
}
int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr)
if (!space_info) {
ret = update_space_info(extent_root->fs_info, flags,
0, 0, &space_info);
- BUG_ON(ret);
+ BUG_ON(ret); /* -ENOMEM */
}
- BUG_ON(!space_info);
+ BUG_ON(!space_info); /* Logic error */
again:
spin_lock(&space_info->lock);
ret = wait_event_interruptible(space_info->wait,
!space_info->flush);
/* Must have been interrupted, return */
- if (ret)
+ if (ret) {
+ printk(KERN_DEBUG "btrfs: %s returning -EINTR\n", __func__);
return -EINTR;
+ }
spin_lock(&space_info->lock);
}
return ret;
}
-static struct btrfs_block_rsv *get_block_rsv(struct btrfs_trans_handle *trans,
- struct btrfs_root *root)
+static struct btrfs_block_rsv *get_block_rsv(
+ const struct btrfs_trans_handle *trans,
+ const struct btrfs_root *root)
{
struct btrfs_block_rsv *block_rsv = NULL;
trans->bytes_reserved = 0;
}
+/* Can only return 0 or -ENOSPC */
int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans,
struct inode *inode)
{
while (total) {
cache = btrfs_lookup_block_group(info, bytenr);
if (!cache)
- return -1;
+ return -ENOENT;
if (cache->flags & (BTRFS_BLOCK_GROUP_DUP |
BTRFS_BLOCK_GROUP_RAID1 |
BTRFS_BLOCK_GROUP_RAID10))
struct btrfs_block_group_cache *cache;
cache = btrfs_lookup_block_group(root->fs_info, bytenr);
- BUG_ON(!cache);
+ BUG_ON(!cache); /* Logic error */
pin_down_extent(root, cache, bytenr, num_bytes, reserved);
struct btrfs_block_group_cache *cache;
cache = btrfs_lookup_block_group(root->fs_info, bytenr);
- BUG_ON(!cache);
+ BUG_ON(!cache); /* Logic error */
/*
* pull in the free space cache (if any) so that our pin
{
struct btrfs_space_info *space_info = cache->space_info;
int ret = 0;
+
spin_lock(&space_info->lock);
spin_lock(&cache->lock);
if (reserve != RESERVE_FREE) {
if (cache)
btrfs_put_block_group(cache);
cache = btrfs_lookup_block_group(fs_info, start);
- BUG_ON(!cache);
+ BUG_ON(!cache); /* Logic error */
}
len = cache->key.objectid + cache->key.offset - start;
u64 end;
int ret;
+ if (trans->aborted)
+ return 0;
+
if (fs_info->pinned_extents == &fs_info->freed_extents[0])
unpin = &fs_info->freed_extents[1];
else
ret = remove_extent_backref(trans, extent_root, path,
NULL, refs_to_drop,
is_data);
- BUG_ON(ret);
+ if (ret)
+ goto abort;
btrfs_release_path(path);
path->leave_spinning = 1;
btrfs_print_leaf(extent_root,
path->nodes[0]);
}
- BUG_ON(ret);
+ if (ret < 0)
+ goto abort;
extent_slot = path->slots[0];
}
- } else {
+ } else if (ret == -ENOENT) {
btrfs_print_leaf(extent_root, path->nodes[0]);
WARN_ON(1);
printk(KERN_ERR "btrfs unable to find ref byte nr %llu "
(unsigned long long)root_objectid,
(unsigned long long)owner_objectid,
(unsigned long long)owner_offset);
+ } else {
+ goto abort;
}
leaf = path->nodes[0];
BUG_ON(found_extent || extent_slot != path->slots[0]);
ret = convert_extent_item_v0(trans, extent_root, path,
owner_objectid, 0);
- BUG_ON(ret < 0);
+ if (ret < 0)
+ goto abort;
btrfs_release_path(path);
path->leave_spinning = 1;
(unsigned long long)bytenr);
btrfs_print_leaf(extent_root, path->nodes[0]);
}
- BUG_ON(ret);
+ if (ret < 0)
+ goto abort;
extent_slot = path->slots[0];
leaf = path->nodes[0];
item_size = btrfs_item_size_nr(leaf, extent_slot);
ret = remove_extent_backref(trans, extent_root, path,
iref, refs_to_drop,
is_data);
- BUG_ON(ret);
+ if (ret)
+ goto abort;
}
} else {
if (found_extent) {
ret = btrfs_del_items(trans, extent_root, path, path->slots[0],
num_to_del);
- BUG_ON(ret);
+ if (ret)
+ goto abort;
btrfs_release_path(path);
if (is_data) {
ret = btrfs_del_csums(trans, root, bytenr, num_bytes);
- BUG_ON(ret);
+ if (ret)
+ goto abort;
} else {
invalidate_mapping_pages(info->btree_inode->i_mapping,
bytenr >> PAGE_CACHE_SHIFT,
}
ret = update_block_group(trans, root, bytenr, num_bytes, 0);
- BUG_ON(ret);
+ if (ret)
+ goto abort;
}
+out:
btrfs_free_path(path);
return ret;
+
+abort:
+ btrfs_abort_transaction(trans, extent_root, ret);
+ goto out;
}
/*
parent, root->root_key.objectid,
btrfs_header_level(buf),
BTRFS_DROP_DELAYED_REF, NULL, for_cow);
- BUG_ON(ret);
+ BUG_ON(ret); /* -ENOMEM */
}
if (!last_ref)
btrfs_put_block_group(cache);
}
+/* Can return -ENOMEM */
int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root *root,
u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid,
u64 owner, u64 offset, int for_cow)
num_bytes,
parent, root_objectid, (int)owner,
BTRFS_DROP_DELAYED_REF, NULL, for_cow);
- BUG_ON(ret);
} else {
ret = btrfs_add_delayed_data_ref(fs_info, trans, bytenr,
num_bytes,
parent, root_objectid, owner,
offset, BTRFS_DROP_DELAYED_REF,
NULL, for_cow);
- BUG_ON(ret);
}
return ret;
}
found_uncached_bg = true;
ret = cache_block_group(block_group, trans,
orig_root, 1);
+ BUG_ON(ret < 0); /* -ENOMEM */
if (block_group->cached == BTRFS_CACHE_FINISHED)
goto alloc;
if (loop > LOOP_FIND_IDEAL) {
ret = cache_block_group(block_group, trans,
orig_root, 0);
- BUG_ON(ret);
+ BUG_ON(ret); /* -ENOMEM */
}
/*
ret = do_chunk_alloc(trans, root, num_bytes +
2 * 1024 * 1024, data,
CHUNK_ALLOC_LIMITED);
+ if (ret < 0) {
+ btrfs_abort_transaction(trans,
+ root, ret);
+ goto out;
+ }
allowed_chunk_alloc = 0;
if (ret == 1)
done_chunk_alloc = 1;
} else if (ins->objectid) {
ret = 0;
}
+out:
return ret;
}
* the only place that sets empty_size is btrfs_realloc_node, which
* is not called recursively on allocations
*/
- if (empty_size || root->ref_cows)
+ if (empty_size || root->ref_cows) {
ret = do_chunk_alloc(trans, root->fs_info->extent_root,
num_bytes + 2 * 1024 * 1024, data,
CHUNK_ALLOC_NO_FORCE);
+ if (ret < 0 && ret != -ENOSPC) {
+ btrfs_abort_transaction(trans, root, ret);
+ return ret;
+ }
+ }
WARN_ON(num_bytes < root->sectorsize);
ret = find_free_extent(trans, root, num_bytes, empty_size,
num_bytes = num_bytes >> 1;
num_bytes = num_bytes & ~(root->sectorsize - 1);
num_bytes = max(num_bytes, min_alloc_size);
- do_chunk_alloc(trans, root->fs_info->extent_root,
+ ret = do_chunk_alloc(trans, root->fs_info->extent_root,
num_bytes, data, CHUNK_ALLOC_FORCE);
+ if (ret < 0 && ret != -ENOSPC) {
+ btrfs_abort_transaction(trans, root, ret);
+ return ret;
+ }
if (num_bytes == min_alloc_size)
final_tried = true;
goto again;
path->leave_spinning = 1;
ret = btrfs_insert_empty_item(trans, fs_info->extent_root, path,
ins, size);
- BUG_ON(ret);
+ if (ret) {
+ btrfs_free_path(path);
+ return ret;
+ }
leaf = path->nodes[0];
extent_item = btrfs_item_ptr(leaf, path->slots[0],
btrfs_free_path(path);
ret = update_block_group(trans, root, ins->objectid, ins->offset, 1);
- if (ret) {
+ if (ret) { /* -ENOENT, logic error */
printk(KERN_ERR "btrfs update block group failed for %llu "
"%llu\n", (unsigned long long)ins->objectid,
(unsigned long long)ins->offset);
path->leave_spinning = 1;
ret = btrfs_insert_empty_item(trans, fs_info->extent_root, path,
ins, size);
- BUG_ON(ret);
+ if (ret) {
+ btrfs_free_path(path);
+ return ret;
+ }
leaf = path->nodes[0];
extent_item = btrfs_item_ptr(leaf, path->slots[0],
btrfs_free_path(path);
ret = update_block_group(trans, root, ins->objectid, ins->offset, 1);
- if (ret) {
+ if (ret) { /* -ENOENT, logic error */
printk(KERN_ERR "btrfs update block group failed for %llu "
"%llu\n", (unsigned long long)ins->objectid,
(unsigned long long)ins->offset);
if (!caching_ctl) {
BUG_ON(!block_group_cache_done(block_group));
ret = btrfs_remove_free_space(block_group, start, num_bytes);
- BUG_ON(ret);
+ BUG_ON(ret); /* -ENOMEM */
} else {
mutex_lock(&caching_ctl->mutex);
if (start >= caching_ctl->progress) {
ret = add_excluded_extent(root, start, num_bytes);
- BUG_ON(ret);
+ BUG_ON(ret); /* -ENOMEM */
} else if (start + num_bytes <= caching_ctl->progress) {
ret = btrfs_remove_free_space(block_group,
start, num_bytes);
- BUG_ON(ret);
+ BUG_ON(ret); /* -ENOMEM */
} else {
num_bytes = caching_ctl->progress - start;
ret = btrfs_remove_free_space(block_group,
start, num_bytes);
- BUG_ON(ret);
+ BUG_ON(ret); /* -ENOMEM */
start = caching_ctl->progress;
num_bytes = ins->objectid + ins->offset -
caching_ctl->progress;
ret = add_excluded_extent(root, start, num_bytes);
- BUG_ON(ret);
+ BUG_ON(ret); /* -ENOMEM */
}
mutex_unlock(&caching_ctl->mutex);
ret = btrfs_update_reserved_bytes(block_group, ins->offset,
RESERVE_ALLOC_NO_ACCOUNT);
- BUG_ON(ret);
+ BUG_ON(ret); /* logic error */
btrfs_put_block_group(block_group);
ret = alloc_reserved_file_extent(trans, root, 0, root_objectid,
0, owner, offset, ins, 1);
buf = btrfs_init_new_buffer(trans, root, ins.objectid,
blocksize, level);
- BUG_ON(IS_ERR(buf));
+ BUG_ON(IS_ERR(buf)); /* -ENOMEM */
if (root_objectid == BTRFS_TREE_RELOC_OBJECTID) {
if (parent == 0)
if (root_objectid != BTRFS_TREE_LOG_OBJECTID) {
struct btrfs_delayed_extent_op *extent_op;
extent_op = kmalloc(sizeof(*extent_op), GFP_NOFS);
- BUG_ON(!extent_op);
+ BUG_ON(!extent_op); /* -ENOMEM */
if (key)
memcpy(&extent_op->key, key, sizeof(extent_op->key));
else
ins.offset, parent, root_objectid,
level, BTRFS_ADD_DELAYED_EXTENT,
extent_op, for_cow);
- BUG_ON(ret);
+ BUG_ON(ret); /* -ENOMEM */
}
return buf;
}
/* We don't lock the tree block, it's OK to be racy here */
ret = btrfs_lookup_extent_info(trans, root, bytenr, blocksize,
&refs, &flags);
- BUG_ON(ret);
+ /* We don't care about errors in readahead. */
+ if (ret < 0)
+ continue;
BUG_ON(refs == 0);
if (wc->stage == DROP_REFERENCE) {
eb->start, eb->len,
&wc->refs[level],
&wc->flags[level]);
- BUG_ON(ret);
+ BUG_ON(ret == -ENOMEM);
+ if (ret)
+ return ret;
BUG_ON(wc->refs[level] == 0);
}
if (!(wc->flags[level] & flag)) {
BUG_ON(!path->locks[level]);
ret = btrfs_inc_ref(trans, root, eb, 1, wc->for_reloc);
- BUG_ON(ret);
+ BUG_ON(ret); /* -ENOMEM */
ret = btrfs_dec_ref(trans, root, eb, 0, wc->for_reloc);
- BUG_ON(ret);
+ BUG_ON(ret); /* -ENOMEM */
ret = btrfs_set_disk_extent_flags(trans, root, eb->start,
eb->len, flag, 0);
- BUG_ON(ret);
+ BUG_ON(ret); /* -ENOMEM */
wc->flags[level] |= flag;
}
ret = btrfs_lookup_extent_info(trans, root, bytenr, blocksize,
&wc->refs[level - 1],
&wc->flags[level - 1]);
- BUG_ON(ret);
+ if (ret < 0) {
+ btrfs_tree_unlock(next);
+ return ret;
+ }
+
BUG_ON(wc->refs[level - 1] == 0);
*lookup_info = 0;
ret = btrfs_free_extent(trans, root, bytenr, blocksize, parent,
root->root_key.objectid, level - 1, 0, 0);
- BUG_ON(ret);
+ BUG_ON(ret); /* -ENOMEM */
}
btrfs_tree_unlock(next);
free_extent_buffer(next);
eb->start, eb->len,
&wc->refs[level],
&wc->flags[level]);
- BUG_ON(ret);
+ if (ret < 0) {
+ btrfs_tree_unlock_rw(eb, path->locks[level]);
+ return ret;
+ }
BUG_ON(wc->refs[level] == 0);
if (wc->refs[level] == 1) {
btrfs_tree_unlock_rw(eb, path->locks[level]);
else
ret = btrfs_dec_ref(trans, root, eb, 0,
wc->for_reloc);
- BUG_ON(ret);
+ BUG_ON(ret); /* -ENOMEM */
}
/* make block locked assertion in clean_tree_block happy */
if (!path->locks[level] &&
}
trans = btrfs_start_transaction(tree_root, 0);
- BUG_ON(IS_ERR(trans));
+ if (IS_ERR(trans)) {
+ err = PTR_ERR(trans);
+ goto out_free;
+ }
if (block_rsv)
trans->block_rsv = block_rsv;
path->lowest_level = 0;
if (ret < 0) {
err = ret;
- goto out_free;
+ goto out_end_trans;
}
WARN_ON(ret > 0);
path->nodes[level]->len,
&wc->refs[level],
&wc->flags[level]);
- BUG_ON(ret);
+ if (ret < 0) {
+ err = ret;
+ goto out_end_trans;
+ }
BUG_ON(wc->refs[level] == 0);
if (level == root_item->drop_level)
ret = btrfs_update_root(trans, tree_root,
&root->root_key,
root_item);
- BUG_ON(ret);
+ if (ret) {
+ btrfs_abort_transaction(trans, tree_root, ret);
+ err = ret;
+ goto out_end_trans;
+ }
btrfs_end_transaction_throttle(trans, tree_root);
trans = btrfs_start_transaction(tree_root, 0);
- BUG_ON(IS_ERR(trans));
+ if (IS_ERR(trans)) {
+ err = PTR_ERR(trans);
+ goto out_free;
+ }
if (block_rsv)
trans->block_rsv = block_rsv;
}
}
btrfs_release_path(path);
- BUG_ON(err);
+ if (err)
+ goto out_end_trans;
ret = btrfs_del_root(trans, tree_root, &root->root_key);
- BUG_ON(ret);
+ if (ret) {
+ btrfs_abort_transaction(trans, tree_root, ret);
+ goto out_end_trans;
+ }
if (root->root_key.objectid != BTRFS_TREE_RELOC_OBJECTID) {
ret = btrfs_find_last_root(tree_root, root->root_key.objectid,
NULL, NULL);
- BUG_ON(ret < 0);
- if (ret > 0) {
+ if (ret < 0) {
+ btrfs_abort_transaction(trans, tree_root, ret);
+ err = ret;
+ goto out_end_trans;
+ } else if (ret > 0) {
/* if we fail to delete the orphan item this time
* around, it'll get picked up the next time.
*
free_extent_buffer(root->commit_root);
kfree(root);
}
-out_free:
+out_end_trans:
btrfs_end_transaction_throttle(trans, tree_root);
+out_free:
kfree(wc);
btrfs_free_path(path);
out:
BUG_ON(cache->ro);
trans = btrfs_join_transaction(root);
- BUG_ON(IS_ERR(trans));
+ if (IS_ERR(trans))
+ return PTR_ERR(trans);
alloc_flags = update_block_group_flags(root, cache->flags);
- if (alloc_flags != cache->flags)
- do_chunk_alloc(trans, root, 2 * 1024 * 1024, alloc_flags,
- CHUNK_ALLOC_FORCE);
+ if (alloc_flags != cache->flags) {
+ ret = do_chunk_alloc(trans, root, 2 * 1024 * 1024, alloc_flags,
+ CHUNK_ALLOC_FORCE);
+ if (ret < 0)
+ goto out;
+ }
ret = set_block_group_ro(cache, 0);
if (!ret)
ret = update_space_info(info, cache->flags, found_key.offset,
btrfs_block_group_used(&cache->item),
&space_info);
- BUG_ON(ret);
+ BUG_ON(ret); /* -ENOMEM */
cache->space_info = space_info;
spin_lock(&cache->space_info->lock);
cache->space_info->bytes_readonly += cache->bytes_super;
__link_block_group(space_info, cache);
ret = btrfs_add_block_group_cache(root->fs_info, cache);
- BUG_ON(ret);
+ BUG_ON(ret); /* Logic error */
set_avail_alloc_bits(root->fs_info, cache->flags);
if (btrfs_chunk_readonly(root, cache->key.objectid))
ret = update_space_info(root->fs_info, cache->flags, size, bytes_used,
&cache->space_info);
- BUG_ON(ret);
+ BUG_ON(ret); /* -ENOMEM */
update_global_block_rsv(root->fs_info);
spin_lock(&cache->space_info->lock);
__link_block_group(cache->space_info, cache);
ret = btrfs_add_block_group_cache(root->fs_info, cache);
- BUG_ON(ret);
+ BUG_ON(ret); /* Logic error */
ret = btrfs_insert_item(trans, extent_root, &cache->key, &cache->item,
sizeof(cache->item));
- BUG_ON(ret);
+ if (ret) {
+ btrfs_abort_transaction(trans, extent_root, ret);
+ return ret;
+ }
set_avail_alloc_bits(extent_root->fs_info, type);
inode = lookup_free_space_inode(tree_root, block_group, path);
if (!IS_ERR(inode)) {
ret = btrfs_orphan_add(trans, inode);
- BUG_ON(ret);
+ if (ret) {
+ btrfs_add_delayed_iput(inode);
+ goto out;
+ }
clear_nlink(inode);
/* One for the block groups ref */
spin_lock(&block_group->lock);
while (index <= end_index) {
page = find_get_page(tree->mapping, index);
- BUG_ON(!page);
+ BUG_ON(!page); /* Pages should be in the extent_io_tree */
set_page_writeback(page);
page_cache_release(page);
index++;
goto out_failed;
}
}
- BUG_ON(ret);
+ BUG_ON(ret); /* Only valid values are 0 and -EAGAIN */
/* step three, lock the state bits for the whole range */
lock_extent_bits(tree, delalloc_start, delalloc_end, 0, &cached_state);
/* Writeback already completed */
if (ret == 0)
return 1;
- BUG_ON(ret < 0);
}
if (!uptodate) {
if (ret == 0)
goto error_handled;
}
- BUG_ON(ret < 0);
}
if (uptodate) {
return bio;
}
+/*
+ * Since writes are async, they will only return -ENOMEM.
+ * Reads can return the full range of I/O error conditions.
+ */
static int __must_check submit_one_bio(int rw, struct bio *bio,
int mirror_num, unsigned long bio_flags)
{
bio_add_page(bio, page, page_size, offset) < page_size) {
ret = submit_one_bio(rw, bio, mirror_num,
prev_bio_flags);
- BUG_ON(ret < 0);
+ if (ret < 0)
+ return ret;
bio = NULL;
} else {
return 0;
if (bio_ret)
*bio_ret = bio;
- else {
+ else
ret = submit_one_bio(rw, bio, mirror_num, bio_flags);
- BUG_ON(ret < 0);
- }
return ret;
}
* basic readpage implementation. Locked extent state structs are inserted
* into the tree that are removed when the IO is done (by the end_io
* handlers)
+ * XXX JDM: This needs looking at to ensure proper page locking
*/
static int __extent_read_full_page(struct extent_io_tree *tree,
struct page *page,
end_bio_extent_readpage, mirror_num,
*bio_flags,
this_bio_flag);
+ BUG_ON(ret == -ENOMEM);
nr++;
*bio_flags = this_bio_flag;
}
ret = __extent_read_full_page(tree, page, get_extent, &bio, mirror_num,
&bio_flags);
- if (bio) {
+ if (bio)
ret = submit_one_bio(READ, bio, mirror_num, bio_flags);
- BUG_ON(ret < 0);
- }
return ret;
}
delalloc_end,
&page_started,
&nr_written);
- BUG_ON(ret);
+ /* File system has been set read-only */
+ if (ret) {
+ SetPageError(page);
+ goto done;
+ }
/*
* delalloc_end is already one less than the total
* length, so we don't subtract one from
rw = WRITE_SYNC;
ret = submit_one_bio(rw, epd->bio, 0, 0);
- BUG_ON(ret < 0);
+ BUG_ON(ret < 0); /* -ENOMEM */
epd->bio = NULL;
}
}
page_cache_release(page);
}
BUG_ON(!list_empty(pages));
- if (bio) {
- int ret = submit_one_bio(READ, bio, 0, bio_flags);
- BUG_ON(ret < 0);
- }
+ if (bio)
+ return submit_one_bio(READ, bio, 0, bio_flags);
return 0;
}
if (bio) {
err = submit_one_bio(READ, bio, mirror_num, bio_flags);
- BUG_ON(err < 0);
+ if (err)
+ return err;
}
if (ret || wait != WAIT_COMPLETE)
sizeof(*item));
if (ret < 0)
goto out;
- BUG_ON(ret);
+ BUG_ON(ret); /* Can't happen */
leaf = path->nodes[0];
item = btrfs_item_ptr(leaf, path->slots[0],
struct btrfs_file_extent_item);
offset = page_offset(bvec->bv_page) + bvec->bv_offset;
ordered = btrfs_lookup_ordered_extent(inode, offset);
- BUG_ON(!ordered);
+ BUG_ON(!ordered); /* Logic error */
sums->bytenr = ordered->start;
while (bio_index < bio->bi_vcnt) {
sums = kzalloc(btrfs_ordered_sum_size(root, bytes_left),
GFP_NOFS);
- BUG_ON(!sums);
+ BUG_ON(!sums); /* -ENOMEM */
sector_sum = sums->sums;
sums->len = bytes_left;
ordered = btrfs_lookup_ordered_extent(inode, offset);
- BUG_ON(!ordered);
+ BUG_ON(!ordered); /* Logic error */
sums->bytenr = ordered->start;
}
* item changed size or key
*/
ret = btrfs_split_item(trans, root, path, &key, offset);
- BUG_ON(ret && ret != -EAGAIN);
+ if (ret && ret != -EAGAIN) {
+ btrfs_abort_transaction(trans, root, ret);
+ goto out;
+ }
key.offset = end_byte - 1;
} else {
split = alloc_extent_map();
if (!split2)
split2 = alloc_extent_map();
- BUG_ON(!split || !split2);
+ BUG_ON(!split || !split2); /* -ENOMEM */
write_lock(&em_tree->lock);
em = lookup_extent_mapping(em_tree, start, len);
split->flags = flags;
split->compress_type = em->compress_type;
ret = add_extent_mapping(em_tree, split);
- BUG_ON(ret);
+ BUG_ON(ret); /* Logic error */
free_extent_map(split);
split = split2;
split2 = NULL;
}
ret = add_extent_mapping(em_tree, split);
- BUG_ON(ret);
+ BUG_ON(ret); /* Logic error */
free_extent_map(split);
split = NULL;
}
root->root_key.objectid,
new_key.objectid,
start - extent_offset, 0);
- BUG_ON(ret);
+ BUG_ON(ret); /* -ENOMEM */
*hint_byte = disk_bytenr;
}
key.offset = start;
root->root_key.objectid,
key.objectid, key.offset -
extent_offset, 0);
- BUG_ON(ret);
+ BUG_ON(ret); /* -ENOMEM */
inode_sub_bytes(inode,
extent_end - key.offset);
*hint_byte = disk_bytenr;
ret = btrfs_del_items(trans, root, path, del_slot,
del_nr);
- BUG_ON(ret);
+ if (ret) {
+ btrfs_abort_transaction(trans, root, ret);
+ goto out;
+ }
del_nr = 0;
del_slot = 0;
BUG_ON(1);
}
- if (del_nr > 0) {
+ if (!ret && del_nr > 0) {
ret = btrfs_del_items(trans, root, path, del_slot, del_nr);
- BUG_ON(ret);
+ if (ret)
+ btrfs_abort_transaction(trans, root, ret);
}
+out:
btrfs_free_path(path);
return ret;
}
btrfs_release_path(path);
goto again;
}
- BUG_ON(ret < 0);
+ if (ret < 0) {
+ btrfs_abort_transaction(trans, root, ret);
+ goto out;
+ }
leaf = path->nodes[0];
fi = btrfs_item_ptr(leaf, path->slots[0] - 1,
ret = btrfs_inc_extent_ref(trans, root, bytenr, num_bytes, 0,
root->root_key.objectid,
ino, orig_offset, 0);
- BUG_ON(ret);
+ BUG_ON(ret); /* -ENOMEM */
if (split == start) {
key.offset = start;
ret = btrfs_free_extent(trans, root, bytenr, num_bytes,
0, root->root_key.objectid,
ino, orig_offset, 0);
- BUG_ON(ret);
+ BUG_ON(ret); /* -ENOMEM */
}
other_start = 0;
other_end = start;
ret = btrfs_free_extent(trans, root, bytenr, num_bytes,
0, root->root_key.objectid,
ino, orig_offset, 0);
- BUG_ON(ret);
+ BUG_ON(ret); /* -ENOMEM */
}
if (del_nr == 0) {
fi = btrfs_item_ptr(leaf, path->slots[0],
btrfs_mark_buffer_dirty(leaf);
ret = btrfs_del_items(trans, root, path, del_slot, del_nr);
- BUG_ON(ret);
+ if (ret < 0) {
+ btrfs_abort_transaction(trans, root, ret);
+ goto out;
+ }
}
out:
btrfs_free_path(path);
em = btrfs_get_extent(inode, NULL, 0, cur_offset,
alloc_end - cur_offset, 0);
- BUG_ON(IS_ERR_OR_NULL(em));
+ if (IS_ERR_OR_NULL(em)) {
+ if (!em)
+ ret = -ENOMEM;
+ else
+ ret = PTR_ERR(em);
+ break;
+ }
last_byte = min(extent_map_end(em), alloc_end);
actual_end = min_t(u64, extent_map_end(em), offset + len);
last_byte = (last_byte + mask) & ~mask;
if (ret) {
trans->block_rsv = rsv;
- WARN_ON(1);
+ btrfs_abort_transaction(trans, root, ret);
return ret;
}
ret = btrfs_update_inode(trans, root, inode);
+ if (ret)
+ btrfs_abort_transaction(trans, root, ret);
trans->block_rsv = rsv;
return ret;
*/
ret = btrfs_add_free_space(block_group, old_start,
offset - old_start);
- WARN_ON(ret);
+ WARN_ON(ret); /* -ENOMEM */
goto out;
}
ret = remove_from_bitmap(ctl, info, &offset, &bytes);
if (ret == -EAGAIN)
goto again;
- BUG_ON(ret);
+ BUG_ON(ret); /* logic error */
out_lock:
spin_unlock(&ctl->tree_lock);
out:
rb_erase(&entry->offset_index, &ctl->free_space_offset);
ret = tree_insert_offset(&cluster->root, entry->offset,
&entry->offset_index, 1);
- BUG_ON(ret);
+ BUG_ON(ret); /* -EEXIST; Logic error */
trace_btrfs_setup_cluster(block_group, cluster,
total_found * block_group->sectorsize, 1);
ret = tree_insert_offset(&cluster->root, entry->offset,
&entry->offset_index, 0);
total_size += entry->bytes;
- BUG_ON(ret);
+ BUG_ON(ret); /* -EEXIST; Logic error */
} while (node && entry != last);
cluster->max_size = max_extent;
int ret;
ret = search_bitmap(ctl, entry, &offset, &count);
+ /* Logic error; Should be empty if it can't find anything */
BUG_ON(ret);
ino = offset;
return ret;
}
+/* Will return 0, -ENOMEM, -EMLINK, or -EEXIST or anything from the CoW path */
int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
const char *name, int name_len,
tsk = kthread_run(caching_kthread, root, "btrfs-ino-cache-%llu\n",
root->root_key.objectid);
- BUG_ON(IS_ERR(tsk));
+ BUG_ON(IS_ERR(tsk)); /* -ENOMEM */
}
int btrfs_find_free_ino(struct btrfs_root *root, u64 *objectid)
break;
info = rb_entry(n, struct btrfs_free_space, offset_index);
- BUG_ON(info->bitmap);
+ BUG_ON(info->bitmap); /* Logic error */
if (info->offset > root->cache_progress)
goto free;
trans->bytes_reserved, 1);
again:
inode = lookup_free_ino_inode(root, path);
- if (IS_ERR(inode) && PTR_ERR(inode) != -ENOENT) {
+ if (IS_ERR(inode) && (PTR_ERR(inode) != -ENOENT || retry)) {
ret = PTR_ERR(inode);
goto out_release;
}
if (IS_ERR(inode)) {
- BUG_ON(retry);
+ BUG_ON(retry); /* Logic error */
retry = true;
ret = create_free_ino_inode(root, trans, path);
BTRFS_I(inode)->generation = 0;
ret = btrfs_update_inode(trans, root, inode);
- WARN_ON(ret);
+ if (ret) {
+ btrfs_abort_transaction(trans, root, ret);
+ goto out_put;
+ }
if (i_size_read(inode) > 0) {
ret = btrfs_truncate_free_space_cache(root, trans, path, inode);
- if (ret)
+ if (ret) {
+ btrfs_abort_transaction(trans, root, ret);
goto out_put;
+ }
}
spin_lock(&root->cache_lock);
ret = btrfs_search_slot(NULL, root, &search_key, path, 0, 0);
if (ret < 0)
goto error;
- BUG_ON(ret == 0);
+ BUG_ON(ret == 0); /* Corruption */
if (path->slots[0] > 0) {
slot = path->slots[0] - 1;
l = path->nodes[0];
inode_add_bytes(inode, size);
ret = btrfs_insert_empty_item(trans, root, path, &key,
datasize);
- BUG_ON(ret);
if (ret) {
err = ret;
goto fail;
* could end up racing with unlink.
*/
BTRFS_I(inode)->disk_i_size = inode->i_size;
- btrfs_update_inode(trans, root, inode);
+ ret = btrfs_update_inode(trans, root, inode);
- return 0;
+ return ret;
fail:
btrfs_free_path(path);
return err;
ret = btrfs_drop_extents(trans, inode, start, aligned_end,
&hint_byte, 1);
- BUG_ON(ret);
+ if (ret)
+ return ret;
if (isize > actual_end)
inline_len = min_t(u64, isize, actual_end);
ret = insert_inline_extent(trans, root, inode, start,
inline_len, compressed_size,
compress_type, compressed_pages);
- BUG_ON(ret);
+ if (ret) {
+ btrfs_abort_transaction(trans, root, ret);
+ return ret;
+ }
btrfs_delalloc_release_metadata(inode, end + 1 - start);
btrfs_drop_extent_cache(inode, start, aligned_end - 1, 0);
return 0;
struct async_extent *async_extent;
async_extent = kmalloc(sizeof(*async_extent), GFP_NOFS);
- BUG_ON(!async_extent);
+ BUG_ON(!async_extent); /* -ENOMEM */
async_extent->start = start;
async_extent->ram_size = ram_size;
async_extent->compressed_size = compressed_size;
cont:
if (start == 0) {
trans = btrfs_join_transaction(root);
- BUG_ON(IS_ERR(trans));
+ if (IS_ERR(trans)) {
+ ret = PTR_ERR(trans);
+ trans = NULL;
+ goto cleanup_and_out;
+ }
trans->block_rsv = &root->fs_info->delalloc_block_rsv;
/* lets try to make an inline extent */
total_compressed,
compress_type, pages);
}
- if (ret == 0) {
+ if (ret <= 0) {
/*
- * inline extent creation worked, we don't need
- * to create any more async work items. Unlock
- * and free up our temp pages.
+ * inline extent creation worked or returned error,
+ * we don't need to create any more async work items.
+ * Unlock and free up our temp pages.
*/
extent_clear_unlock_delalloc(inode,
&BTRFS_I(inode)->io_tree,
}
out:
- return 0;
+ return ret;
free_pages_out:
for (i = 0; i < nr_pages_ret; i++) {
kfree(pages);
goto out;
+
+cleanup_and_out:
+ extent_clear_unlock_delalloc(inode, &BTRFS_I(inode)->io_tree,
+ start, end, NULL,
+ EXTENT_CLEAR_UNLOCK_PAGE |
+ EXTENT_CLEAR_DIRTY |
+ EXTENT_CLEAR_DELALLOC |
+ EXTENT_SET_WRITEBACK |
+ EXTENT_END_WRITEBACK);
+ if (!trans || IS_ERR(trans))
+ btrfs_error(root->fs_info, ret, "Failed to join transaction");
+ else
+ btrfs_abort_transaction(trans, root, ret);
+ goto free_pages_out;
}
/*
async_extent->ram_size - 1,
&page_started, &nr_written, 0);
+ /* JDM XXX */
+
/*
* if page_started, cow_file_range inserted an
* inline extent and took care of all the unlocking
async_extent->start + async_extent->ram_size - 1);
trans = btrfs_join_transaction(root);
- BUG_ON(IS_ERR(trans));
- trans->block_rsv = &root->fs_info->delalloc_block_rsv;
- ret = btrfs_reserve_extent(trans, root,
+ if (IS_ERR(trans)) {
+ ret = PTR_ERR(trans);
+ } else {
+ trans->block_rsv = &root->fs_info->delalloc_block_rsv;
+ ret = btrfs_reserve_extent(trans, root,
async_extent->compressed_size,
async_extent->compressed_size,
0, alloc_hint,
(u64)-1, &ins, 1);
- btrfs_end_transaction(trans, root);
+ if (ret)
+ btrfs_abort_transaction(trans, root, ret);
+ btrfs_end_transaction(trans, root);
+ }
if (ret) {
int i;
unlock_extent(io_tree, async_extent->start,
async_extent->start +
async_extent->ram_size - 1);
- goto retry;
+ if (ret == -ENOSPC)
+ goto retry;
+ goto out_free; /* JDM: Requeue? */
}
/*
async_extent->ram_size - 1, 0);
em = alloc_extent_map();
- BUG_ON(!em);
+ BUG_ON(!em); /* -ENOMEM */
em->start = async_extent->start;
em->len = async_extent->ram_size;
em->orig_start = em->start;
ins.offset,
BTRFS_ORDERED_COMPRESSED,
async_extent->compress_type);
- BUG_ON(ret);
+ BUG_ON(ret); /* -ENOMEM */
/*
* clear dirty, set writeback and unlock the pages.
ins.offset, async_extent->pages,
async_extent->nr_pages);
- BUG_ON(ret);
+ BUG_ON(ret); /* -ENOMEM */
alloc_hint = ins.objectid + ins.offset;
kfree(async_extent);
cond_resched();
}
-
- return 0;
+ ret = 0;
+out:
+ return ret;
+out_free:
+ kfree(async_extent);
+ goto out;
}
static u64 get_extent_allocation_hint(struct inode *inode, u64 start,
BUG_ON(btrfs_is_free_space_inode(root, inode));
trans = btrfs_join_transaction(root);
- BUG_ON(IS_ERR(trans));
+ if (IS_ERR(trans)) {
+ extent_clear_unlock_delalloc(inode,
+ &BTRFS_I(inode)->io_tree,
+ start, end, NULL,
+ EXTENT_CLEAR_UNLOCK_PAGE |
+ EXTENT_CLEAR_UNLOCK |
+ EXTENT_CLEAR_DELALLOC |
+ EXTENT_CLEAR_DIRTY |
+ EXTENT_SET_WRITEBACK |
+ EXTENT_END_WRITEBACK);
+ return PTR_ERR(trans);
+ }
trans->block_rsv = &root->fs_info->delalloc_block_rsv;
num_bytes = (end - start + blocksize) & ~(blocksize - 1);
*nr_written = *nr_written +
(end - start + PAGE_CACHE_SIZE) / PAGE_CACHE_SIZE;
*page_started = 1;
- ret = 0;
goto out;
+ } else if (ret < 0) {
+ btrfs_abort_transaction(trans, root, ret);
+ goto out_unlock;
}
}
ret = btrfs_reserve_extent(trans, root, cur_alloc_size,
root->sectorsize, 0, alloc_hint,
(u64)-1, &ins, 1);
- BUG_ON(ret);
+ if (ret < 0) {
+ btrfs_abort_transaction(trans, root, ret);
+ goto out_unlock;
+ }
em = alloc_extent_map();
- BUG_ON(!em);
+ BUG_ON(!em); /* -ENOMEM */
em->start = start;
em->orig_start = em->start;
ram_size = ins.offset;
cur_alloc_size = ins.offset;
ret = btrfs_add_ordered_extent(inode, start, ins.objectid,
ram_size, cur_alloc_size, 0);
- BUG_ON(ret);
+ BUG_ON(ret); /* -ENOMEM */
if (root->root_key.objectid ==
BTRFS_DATA_RELOC_TREE_OBJECTID) {
ret = btrfs_reloc_clone_csums(inode, start,
cur_alloc_size);
- BUG_ON(ret);
+ if (ret) {
+ btrfs_abort_transaction(trans, root, ret);
+ goto out_unlock;
+ }
}
if (disk_num_bytes < cur_alloc_size)
alloc_hint = ins.objectid + ins.offset;
start += cur_alloc_size;
}
-out:
ret = 0;
+out:
btrfs_end_transaction(trans, root);
return ret;
+out_unlock:
+ extent_clear_unlock_delalloc(inode,
+ &BTRFS_I(inode)->io_tree,
+ start, end, NULL,
+ EXTENT_CLEAR_UNLOCK_PAGE |
+ EXTENT_CLEAR_UNLOCK |
+ EXTENT_CLEAR_DELALLOC |
+ EXTENT_CLEAR_DIRTY |
+ EXTENT_SET_WRITEBACK |
+ EXTENT_END_WRITEBACK);
+
+ goto out;
}
/*
1, 0, NULL, GFP_NOFS);
while (start < end) {
async_cow = kmalloc(sizeof(*async_cow), GFP_NOFS);
- BUG_ON(!async_cow);
+ BUG_ON(!async_cow); /* -ENOMEM */
async_cow->inode = inode;
async_cow->root = root;
async_cow->locked_page = locked_page;
u64 disk_bytenr;
u64 num_bytes;
int extent_type;
- int ret;
+ int ret, err;
int type;
int nocow;
int check_prev = 1;
else
trans = btrfs_join_transaction(root);
- BUG_ON(IS_ERR(trans));
+ if (IS_ERR(trans)) {
+ btrfs_free_path(path);
+ return PTR_ERR(trans);
+ }
+
trans->block_rsv = &root->fs_info->delalloc_block_rsv;
cow_start = (u64)-1;
while (1) {
ret = btrfs_lookup_file_extent(trans, root, path, ino,
cur_offset, 0);
- BUG_ON(ret < 0);
+ if (ret < 0) {
+ btrfs_abort_transaction(trans, root, ret);
+ goto error;
+ }
if (ret > 0 && path->slots[0] > 0 && check_prev) {
leaf = path->nodes[0];
btrfs_item_key_to_cpu(leaf, &found_key,
leaf = path->nodes[0];
if (path->slots[0] >= btrfs_header_nritems(leaf)) {
ret = btrfs_next_leaf(root, path);
- if (ret < 0)
- BUG_ON(1);
+ if (ret < 0) {
+ btrfs_abort_transaction(trans, root, ret);
+ goto error;
+ }
if (ret > 0)
break;
leaf = path->nodes[0];
ret = cow_file_range(inode, locked_page, cow_start,
found_key.offset - 1, page_started,
nr_written, 1);
- BUG_ON(ret);
+ if (ret) {
+ btrfs_abort_transaction(trans, root, ret);
+ goto error;
+ }
cow_start = (u64)-1;
}
struct extent_map_tree *em_tree;
em_tree = &BTRFS_I(inode)->extent_tree;
em = alloc_extent_map();
- BUG_ON(!em);
+ BUG_ON(!em); /* -ENOMEM */
em->start = cur_offset;
em->orig_start = em->start;
em->len = num_bytes;
ret = btrfs_add_ordered_extent(inode, cur_offset, disk_bytenr,
num_bytes, num_bytes, type);
- BUG_ON(ret);
+ BUG_ON(ret); /* -ENOMEM */
if (root->root_key.objectid ==
BTRFS_DATA_RELOC_TREE_OBJECTID) {
ret = btrfs_reloc_clone_csums(inode, cur_offset,
num_bytes);
- BUG_ON(ret);
+ if (ret) {
+ btrfs_abort_transaction(trans, root, ret);
+ goto error;
+ }
}
extent_clear_unlock_delalloc(inode, &BTRFS_I(inode)->io_tree,
if (cow_start != (u64)-1) {
ret = cow_file_range(inode, locked_page, cow_start, end,
page_started, nr_written, 1);
- BUG_ON(ret);
+ if (ret) {
+ btrfs_abort_transaction(trans, root, ret);
+ goto error;
+ }
}
+error:
if (nolock) {
- ret = btrfs_end_transaction_nolock(trans, root);
- BUG_ON(ret);
+ err = btrfs_end_transaction_nolock(trans, root);
} else {
- ret = btrfs_end_transaction(trans, root);
- BUG_ON(ret);
+ err = btrfs_end_transaction(trans, root);
}
+ if (!ret)
+ ret = err;
+
btrfs_free_path(path);
- return 0;
+ return ret;
}
/*
int ret = 0;
ret = btrfs_csum_one_bio(root, inode, bio, 0, 0);
- BUG_ON(ret);
+ BUG_ON(ret); /* -ENOMEM */
return 0;
}
*/
ret = btrfs_drop_extents(trans, inode, file_pos, file_pos + num_bytes,
&hint, 0);
- BUG_ON(ret);
+ if (ret)
+ goto out;
ins.objectid = btrfs_ino(inode);
ins.offset = file_pos;
ins.type = BTRFS_EXTENT_DATA_KEY;
ret = btrfs_insert_empty_item(trans, root, path, &ins, sizeof(*fi));
- BUG_ON(ret);
+ if (ret)
+ goto out;
leaf = path->nodes[0];
fi = btrfs_item_ptr(leaf, path->slots[0],
struct btrfs_file_extent_item);
ret = btrfs_alloc_reserved_file_extent(trans, root,
root->root_key.objectid,
btrfs_ino(inode), file_pos, &ins);
- BUG_ON(ret);
+out:
btrfs_free_path(path);
- return 0;
+ return ret;
}
/*
end - start + 1);
if (!ret)
return 0;
- BUG_ON(!ordered_extent);
+ BUG_ON(!ordered_extent); /* Logic error */
nolock = btrfs_is_free_space_inode(root, inode);
if (test_bit(BTRFS_ORDERED_NOCOW, &ordered_extent->flags)) {
- BUG_ON(!list_empty(&ordered_extent->list));
+ BUG_ON(!list_empty(&ordered_extent->list)); /* Logic error */
ret = btrfs_ordered_update_i_size(inode, 0, ordered_extent);
if (!ret) {
if (nolock)
trans = btrfs_join_transaction_nolock(root);
else
trans = btrfs_join_transaction(root);
- BUG_ON(IS_ERR(trans));
+ if (IS_ERR(trans))
+ return PTR_ERR(trans);
trans->block_rsv = &root->fs_info->delalloc_block_rsv;
ret = btrfs_update_inode_fallback(trans, root, inode);
- BUG_ON(ret);
+ if (ret) /* -ENOMEM or corruption */
+ btrfs_abort_transaction(trans, root, ret);
}
goto out;
}
trans = btrfs_join_transaction_nolock(root);
else
trans = btrfs_join_transaction(root);
- BUG_ON(IS_ERR(trans));
+ if (IS_ERR(trans)) {
+ ret = PTR_ERR(trans);
+ trans = NULL;
+ goto out_unlock;
+ }
trans->block_rsv = &root->fs_info->delalloc_block_rsv;
if (test_bit(BTRFS_ORDERED_COMPRESSED, &ordered_extent->flags))
ordered_extent->file_offset,
ordered_extent->file_offset +
ordered_extent->len);
- BUG_ON(ret);
} else {
BUG_ON(root == root->fs_info->tree_root);
ret = insert_reserved_file_extent(trans, inode,
unpin_extent_cache(&BTRFS_I(inode)->extent_tree,
ordered_extent->file_offset,
ordered_extent->len);
- BUG_ON(ret);
}
unlock_extent_cached(io_tree, ordered_extent->file_offset,
ordered_extent->file_offset +
ordered_extent->len - 1, &cached_state, GFP_NOFS);
+ if (ret < 0) {
+ btrfs_abort_transaction(trans, root, ret);
+ goto out;
+ }
add_pending_csums(trans, inode, ordered_extent->file_offset,
&ordered_extent->list);
ret = btrfs_ordered_update_i_size(inode, 0, ordered_extent);
if (!ret || !test_bit(BTRFS_ORDERED_PREALLOC, &ordered_extent->flags)) {
ret = btrfs_update_inode_fallback(trans, root, inode);
- BUG_ON(ret);
+ if (ret) { /* -ENOMEM or corruption */
+ btrfs_abort_transaction(trans, root, ret);
+ goto out;
+ }
}
ret = 0;
out:
btrfs_put_ordered_extent(ordered_extent);
return 0;
+out_unlock:
+ unlock_extent_cached(io_tree, ordered_extent->file_offset,
+ ordered_extent->file_offset +
+ ordered_extent->len - 1, &cached_state, GFP_NOFS);
+ goto out;
}
static int btrfs_writepage_end_io_hook(struct page *page, u64 start, u64 end,
struct inode *inode;
};
+/* JDM: If this is fs-wide, why can't we add a pointer to
+ * btrfs_inode instead and avoid the allocation? */
void btrfs_add_delayed_iput(struct inode *inode)
{
struct btrfs_fs_info *fs_info = BTRFS_I(inode)->root->fs_info;
/* grab metadata reservation from transaction handle */
if (reserve) {
ret = btrfs_orphan_reserve_metadata(trans, inode);
- BUG_ON(ret);
+ BUG_ON(ret); /* -ENOSPC in reservation; Logic error? JDM */
}
/* insert an orphan item to track this unlinked/truncated file */
if (insert >= 1) {
ret = btrfs_insert_orphan_item(trans, root, btrfs_ino(inode));
- BUG_ON(ret && ret != -EEXIST);
+ if (ret && ret != -EEXIST) {
+ btrfs_abort_transaction(trans, root, ret);
+ return ret;
+ }
+ ret = 0;
}
/* insert an orphan item to track subvolume contains orphan files */
if (insert >= 2) {
ret = btrfs_insert_orphan_item(trans, root->fs_info->tree_root,
root->root_key.objectid);
- BUG_ON(ret);
+ if (ret && ret != -EEXIST) {
+ btrfs_abort_transaction(trans, root, ret);
+ return ret;
+ }
}
return 0;
}
if (trans && delete_item) {
ret = btrfs_del_orphan_item(trans, root, btrfs_ino(inode));
- BUG_ON(ret);
+ BUG_ON(ret); /* -ENOMEM or corruption (JDM: Recheck) */
}
if (release_rsv)
}
ret = btrfs_del_orphan_item(trans, root,
found_key.objectid);
- BUG_ON(ret);
+ BUG_ON(ret); /* -ENOMEM or corruption (JDM: Recheck) */
btrfs_end_transaction(trans, root);
continue;
}
printk(KERN_INFO "btrfs failed to delete reference to %.*s, "
"inode %llu parent %llu\n", name_len, name,
(unsigned long long)ino, (unsigned long long)dir_ino);
+ btrfs_abort_transaction(trans, root, ret);
goto err;
}
ret = btrfs_delete_delayed_dir_index(trans, root, dir, index);
- if (ret)
+ if (ret) {
+ btrfs_abort_transaction(trans, root, ret);
goto err;
+ }
ret = btrfs_del_inode_ref_in_log(trans, root, name, name_len,
inode, dir_ino);
- BUG_ON(ret != 0 && ret != -ENOENT);
+ if (ret != 0 && ret != -ENOENT) {
+ btrfs_abort_transaction(trans, root, ret);
+ goto err;
+ }
ret = btrfs_del_dir_entries_in_log(trans, root, name, name_len,
dir, index);
err = ret;
goto out;
}
- BUG_ON(ret == 0);
+ BUG_ON(ret == 0); /* Corruption */
if (check_path_shared(root, path))
goto out;
btrfs_release_path(path);
err = PTR_ERR(ref);
goto out;
}
- BUG_ON(!ref);
+ BUG_ON(!ref); /* Logic error */
if (check_path_shared(root, path))
goto out;
index = btrfs_inode_ref_index(path->nodes[0], ref);
di = btrfs_lookup_dir_item(trans, root, path, dir_ino,
name, name_len, -1);
- BUG_ON(IS_ERR_OR_NULL(di));
+ if (IS_ERR_OR_NULL(di)) {
+ if (!di)
+ ret = -ENOENT;
+ else
+ ret = PTR_ERR(di);
+ goto out;
+ }
leaf = path->nodes[0];
btrfs_dir_item_key_to_cpu(leaf, di, &key);
WARN_ON(key.type != BTRFS_ROOT_ITEM_KEY || key.objectid != objectid);
ret = btrfs_delete_one_dir_name(trans, root, path, di);
- BUG_ON(ret);
+ if (ret) {
+ btrfs_abort_transaction(trans, root, ret);
+ goto out;
+ }
btrfs_release_path(path);
ret = btrfs_del_root_ref(trans, root->fs_info->tree_root,
objectid, root->root_key.objectid,
dir_ino, &index, name, name_len);
if (ret < 0) {
- BUG_ON(ret != -ENOENT);
+ if (ret != -ENOENT) {
+ btrfs_abort_transaction(trans, root, ret);
+ goto out;
+ }
di = btrfs_search_dir_index_item(root, path, dir_ino,
name, name_len);
- BUG_ON(IS_ERR_OR_NULL(di));
+ if (IS_ERR_OR_NULL(di)) {
+ if (!di)
+ ret = -ENOENT;
+ else
+ ret = PTR_ERR(di);
+ btrfs_abort_transaction(trans, root, ret);
+ goto out;
+ }
leaf = path->nodes[0];
btrfs_item_key_to_cpu(leaf, &key, path->slots[0]);
btrfs_release_path(path);
ret = btrfs_delete_delayed_dir_index(trans, root, dir, index);
- BUG_ON(ret);
+ if (ret) {
+ btrfs_abort_transaction(trans, root, ret);
+ goto out;
+ }
btrfs_i_size_write(dir, dir->i_size - name_len * 2);
dir->i_mtime = dir->i_ctime = CURRENT_TIME;
ret = btrfs_update_inode(trans, root, dir);
- BUG_ON(ret);
-
+ if (ret)
+ btrfs_abort_transaction(trans, root, ret);
+out:
btrfs_free_path(path);
- return 0;
+ return ret;
}
static int btrfs_rmdir(struct inode *dir, struct dentry *dentry)
ret = btrfs_del_items(trans, root, path,
pending_del_slot,
pending_del_nr);
- BUG_ON(ret);
+ if (ret) {
+ btrfs_abort_transaction(trans,
+ root, ret);
+ goto error;
+ }
pending_del_nr = 0;
}
btrfs_release_path(path);
if (pending_del_nr) {
ret = btrfs_del_items(trans, root, path, pending_del_slot,
pending_del_nr);
- BUG_ON(ret);
+ if (ret)
+ btrfs_abort_transaction(trans, root, ret);
}
+error:
btrfs_free_path(path);
return err;
}
while (1) {
em = btrfs_get_extent(inode, NULL, 0, cur_offset,
block_end - cur_offset, 0);
- BUG_ON(IS_ERR_OR_NULL(em));
+ if (IS_ERR(em)) {
+ err = PTR_ERR(em);
+ break;
+ }
last_byte = min(extent_map_end(em), block_end);
last_byte = (last_byte + mask) & ~mask;
if (!test_bit(EXTENT_FLAG_PREALLOC, &em->flags)) {
cur_offset + hole_size,
&hint_byte, 1);
if (err) {
- btrfs_update_inode(trans, root, inode);
+ btrfs_abort_transaction(trans, root, err);
btrfs_end_transaction(trans, root);
break;
}
0, hole_size, 0, hole_size,
0, 0, 0);
if (err) {
- btrfs_update_inode(trans, root, inode);
+ btrfs_abort_transaction(trans, root, err);
btrfs_end_transaction(trans, root);
break;
}
parent_ino, index);
}
- if (ret == 0) {
- ret = btrfs_insert_dir_item(trans, root, name, name_len,
- parent_inode, &key,
- btrfs_inode_type(inode), index);
- if (ret)
- goto fail_dir_item;
+ /* Nothing to clean up yet */
+ if (ret)
+ return ret;
- btrfs_i_size_write(parent_inode, parent_inode->i_size +
- name_len * 2);
- parent_inode->i_mtime = parent_inode->i_ctime = CURRENT_TIME;
- ret = btrfs_update_inode(trans, root, parent_inode);
+ ret = btrfs_insert_dir_item(trans, root, name, name_len,
+ parent_inode, &key,
+ btrfs_inode_type(inode), index);
+ if (ret == -EEXIST)
+ goto fail_dir_item;
+ else if (ret) {
+ btrfs_abort_transaction(trans, root, ret);
+ return ret;
}
+
+ btrfs_i_size_write(parent_inode, parent_inode->i_size +
+ name_len * 2);
+ parent_inode->i_mtime = parent_inode->i_ctime = CURRENT_TIME;
+ ret = btrfs_update_inode(trans, root, parent_inode);
+ if (ret)
+ btrfs_abort_transaction(trans, root, ret);
return ret;
fail_dir_item:
} else {
struct dentry *parent = dentry->d_parent;
err = btrfs_update_inode(trans, root, inode);
- BUG_ON(err);
+ if (err)
+ goto fail;
d_instantiate(dentry, inode);
btrfs_log_new_name(trans, inode, NULL, parent);
}
ret = uncompress_inline(path, inode, page,
pg_offset,
extent_offset, item);
- BUG_ON(ret);
+ BUG_ON(ret); /* -ENOMEM */
} else {
map = kmap(page);
read_extent_buffer(leaf, map + pg_offset, ptr,
free_extent_map(em);
return ERR_PTR(err);
}
+ BUG_ON(!em); /* Error is always set */
return em;
}
int ret;
struct btrfs_root *root = BTRFS_I(inode)->root;
ret = btrfs_csum_one_bio(root, inode, bio, offset, 1);
- BUG_ON(ret);
+ BUG_ON(ret); /* -ENOMEM */
return 0;
}
if (!ret)
ret = btrfs_update_inode(trans, root, old_inode);
}
- BUG_ON(ret);
+ if (ret) {
+ btrfs_abort_transaction(trans, root, ret);
+ goto out_fail;
+ }
if (new_inode) {
new_inode->i_ctime = CURRENT_TIME;
new_dentry->d_name.name,
new_dentry->d_name.len);
}
- BUG_ON(ret);
- if (new_inode->i_nlink == 0) {
+ if (!ret && new_inode->i_nlink == 0) {
ret = btrfs_orphan_add(trans, new_dentry->d_inode);
BUG_ON(ret);
}
+ if (ret) {
+ btrfs_abort_transaction(trans, root, ret);
+ goto out_fail;
+ }
}
fixup_inode_flags(new_dir, old_inode);
ret = btrfs_add_link(trans, new_dir, old_inode,
new_dentry->d_name.name,
new_dentry->d_name.len, 0, index);
- BUG_ON(ret);
+ if (ret) {
+ btrfs_abort_transaction(trans, root, ret);
+ goto out_fail;
+ }
if (old_ino != BTRFS_FIRST_FREE_OBJECTID) {
struct dentry *parent = new_dentry->d_parent;
ins.offset, ins.offset,
ins.offset, 0, 0, 0,
BTRFS_FILE_EXTENT_PREALLOC);
- BUG_ON(ret);
+ if (ret) {
+ btrfs_abort_transaction(trans, root, ret);
+ if (own_trans)
+ btrfs_end_transaction(trans, root);
+ break;
+ }
btrfs_drop_extent_cache(inode, cur_offset,
cur_offset + ins.offset -1, 0);
}
ret = btrfs_update_inode(trans, root, inode);
- BUG_ON(ret);
+
+ if (ret) {
+ btrfs_abort_transaction(trans, root, ret);
+ if (own_trans)
+ btrfs_end_transaction(trans, root);
+ break;
+ }
if (own_trans)
btrfs_end_transaction(trans, root);
key.offset = (u64)-1;
new_root = btrfs_read_fs_root_no_name(root->fs_info, &key);
- BUG_ON(IS_ERR(new_root));
+ if (IS_ERR(new_root)) {
+ btrfs_abort_transaction(trans, root, PTR_ERR(new_root));
+ ret = PTR_ERR(new_root);
+ goto fail;
+ }
btrfs_record_root_in_trans(trans, new_root);
ret = btrfs_create_subvol_root(trans, new_root, new_dirid);
if (ret) {
/* We potentially lose an unused inode item here */
+ btrfs_abort_transaction(trans, root, ret);
goto fail;
}
* insert the directory item
*/
ret = btrfs_set_inode_index(dir, &index);
- BUG_ON(ret);
+ if (ret) {
+ btrfs_abort_transaction(trans, root, ret);
+ goto fail;
+ }
ret = btrfs_insert_dir_item(trans, root,
name, namelen, dir, &key,
BTRFS_FT_DIR, index);
- if (ret)
+ if (ret) {
+ btrfs_abort_transaction(trans, root, ret);
goto fail;
+ }
btrfs_i_size_write(dir, dir->i_size + namelen * 2);
ret = btrfs_update_inode(trans, root, dir);
dest->root_key.objectid,
dentry->d_name.name,
dentry->d_name.len);
- BUG_ON(ret);
+ if (ret) {
+ err = ret;
+ btrfs_abort_transaction(trans, root, ret);
+ goto out_end_trans;
+ }
btrfs_record_root_in_trans(trans, dest);
ret = btrfs_insert_orphan_item(trans,
root->fs_info->tree_root,
dest->root_key.objectid);
- BUG_ON(ret);
+ if (ret) {
+ btrfs_abort_transaction(trans, root, ret);
+ err = ret;
+ goto out_end_trans;
+ }
}
-
+out_end_trans:
ret = btrfs_end_transaction(trans, root);
- BUG_ON(ret);
+ if (ret && !err)
+ err = ret;
inode->i_flags |= S_DEAD;
out_up_write:
up_write(&root->fs_info->subvol_sem);
new_key.offset,
new_key.offset + datal,
&hint_byte, 1);
- BUG_ON(ret);
+ if (ret) {
+ btrfs_abort_transaction(trans, root,
+ ret);
+ btrfs_end_transaction(trans, root);
+ goto out;
+ }
ret = btrfs_insert_empty_item(trans, root, path,
&new_key, size);
- BUG_ON(ret);
+ if (ret) {
+ btrfs_abort_transaction(trans, root,
+ ret);
+ btrfs_end_transaction(trans, root);
+ goto out;
+ }
leaf = path->nodes[0];
slot = path->slots[0];
btrfs_ino(inode),
new_key.offset - datao,
0);
- BUG_ON(ret);
+ if (ret) {
+ btrfs_abort_transaction(trans,
+ root,
+ ret);
+ btrfs_end_transaction(trans,
+ root);
+ goto out;
+
+ }
}
} else if (type == BTRFS_FILE_EXTENT_INLINE) {
u64 skip = 0;
new_key.offset,
new_key.offset + datal,
&hint_byte, 1);
- BUG_ON(ret);
+ if (ret) {
+ btrfs_abort_transaction(trans, root,
+ ret);
+ btrfs_end_transaction(trans, root);
+ goto out;
+ }
ret = btrfs_insert_empty_item(trans, root, path,
&new_key, size);
- BUG_ON(ret);
+ if (ret) {
+ btrfs_abort_transaction(trans, root,
+ ret);
+ btrfs_end_transaction(trans, root);
+ goto out;
+ }
if (skip) {
u32 start =
btrfs_i_size_write(inode, endoff);
ret = btrfs_update_inode(trans, root, inode);
- BUG_ON(ret);
- btrfs_end_transaction(trans, root);
+ if (ret) {
+ btrfs_abort_transaction(trans, root, ret);
+ btrfs_end_transaction(trans, root);
+ goto out;
+ }
+ ret = btrfs_end_transaction(trans, root);
}
next:
btrfs_release_path(path);
ret = btrfs_search_slot(trans, root, &key, path, -1, 1);
if (ret < 0)
goto out;
- if (ret) {
+ if (ret) { /* JDM: Really? */
ret = -ENOENT;
goto out;
}
static noinline_for_stack int mark_garbage_root(struct btrfs_root *root)
{
struct btrfs_trans_handle *trans;
- int ret;
+ int ret, err;
trans = btrfs_start_transaction(root->fs_info->tree_root, 0);
- BUG_ON(IS_ERR(trans));
+ if (IS_ERR(trans))
+ return PTR_ERR(trans);
memset(&root->root_item.drop_progress, 0,
sizeof(root->root_item.drop_progress));
btrfs_set_root_refs(&root->root_item, 0);
ret = btrfs_update_root(trans, root->fs_info->tree_root,
&root->root_key, &root->root_item);
- BUG_ON(ret);
- ret = btrfs_end_transaction(trans, root->fs_info->tree_root);
- BUG_ON(ret);
- return 0;
+ err = btrfs_end_transaction(trans, root->fs_info->tree_root);
+ if (err)
+ return err;
+ return ret;
}
/*
err = ret;
goto out;
}
- mark_garbage_root(reloc_root);
+ ret = mark_garbage_root(reloc_root);
+ if (ret < 0) {
+ err = ret;
+ goto out;
+ }
}
}
fs_root = read_fs_root(root->fs_info,
reloc_root->root_key.offset);
- BUG_ON(IS_ERR(fs_root));
+ if (IS_ERR(fs_root)) {
+ err = PTR_ERR(fs_root);
+ goto out_free;
+ }
err = __add_reloc_root(reloc_root);
- BUG_ON(err < 0);
+ BUG_ON(err < 0); /* -ENOMEM or logic error */
fs_root->reloc_root = reloc_root;
}
- btrfs_commit_transaction(trans, rc->extent_root);
+ err = btrfs_commit_transaction(trans, rc->extent_root);
+ if (err)
+ goto out_free;
merge_reloc_roots(rc);
if (IS_ERR(trans))
err = PTR_ERR(trans);
else
- btrfs_commit_transaction(trans, rc->extent_root);
+ err = btrfs_commit_transaction(trans, rc->extent_root);
out_free:
kfree(rc);
out:
disk_bytenr = file_pos + BTRFS_I(inode)->index_cnt;
ret = btrfs_lookup_csums_range(root->fs_info->csum_root, disk_bytenr,
disk_bytenr + len - 1, &list, 0);
+ if (ret)
+ goto out;
while (!list_empty(&list)) {
sums = list_entry(list.next, struct btrfs_ordered_sum, list);
btrfs_add_ordered_sum(inode, ordered, sums);
}
+out:
btrfs_put_ordered_extent(ordered);
return ret;
}
return -ENOMEM;
ret = btrfs_search_slot(trans, root, key, path, 0, 1);
- if (ret < 0)
+ if (ret < 0) {
+ btrfs_abort_transaction(trans, root, ret);
goto out;
+ }
if (ret != 0) {
btrfs_print_leaf(root, path->nodes[0]);
*
* For a back ref the root_id is the id of the subvol or snapshot and
* ref_id is the id of the tree referencing it.
+ *
+ * Will return 0, -ENOMEM, or anything from the CoW path
*/
int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
struct btrfs_root *tree_root,
again:
ret = btrfs_insert_empty_item(trans, tree_root, path, &key,
sizeof(*ref) + name_len);
- BUG_ON(ret);
+ if (ret) {
+ btrfs_abort_transaction(trans, tree_root, ret);
+ btrfs_free_path(path);
+ return ret;
+ }
leaf = path->nodes[0];
ref = btrfs_item_ptr(leaf, path->slots[0], struct btrfs_root_ref);
struct btrfs_device *device = sdev->dev;
struct btrfs_root *root = device->dev_root;
+ if (root->fs_info->fs_state & BTRFS_SUPER_FLAG_ERROR)
+ return -EIO;
+
gen = root->fs_info->last_trans_committed;
for (i = 0; i < BTRFS_SUPER_MIRROR_MAX; i++) {
struct btrfs_root *root, const char *function,
unsigned int line, int errno)
{
- WARN_ON_ONCE(1);
+ WARN_ONCE(1, KERN_DEBUG "btrfs: Transaction aborted");
trans->aborted = errno;
/* Nothing used. The other threads that have joined this
* transaction may be able to continue. */
dentry->d_name.name, dentry->d_name.len,
parent_inode, &key,
BTRFS_FT_DIR, index);
- if (ret) {
+ if (ret == -EEXIST) {
pending->error = -EEXIST;
dput(parent);
goto fail;
- } else if (ret)
- goto abort_trans;
+ } else if (ret) {
+ goto abort_trans_dput;
+ }
btrfs_i_size_write(parent_inode, parent_inode->i_size +
dentry->d_name.len * 2);
ret = btrfs_update_inode(trans, parent_root, parent_inode);
if (ret)
- goto abort_trans;
+ goto abort_trans_dput;
/*
* pull in the delayed directory update
* snapshot
*/
ret = btrfs_run_delayed_items(trans, root);
- if (ret) /* Transaction aborted */
+ if (ret) { /* Transaction aborted */
+ dput(parent);
goto fail;
+ }
record_root_in_trans(trans, root);
btrfs_set_root_last_snapshot(&root->root_item, trans->transid);
old = btrfs_lock_root_node(root);
ret = btrfs_cow_block(trans, root, old, NULL, 0, &old);
- if (ret)
- goto abort_trans;
+ if (ret) {
+ btrfs_tree_unlock(old);
+ free_extent_buffer(old);
+ goto abort_trans_dput;
+ }
btrfs_set_lock_blocking(old);
ret = btrfs_copy_root(trans, root, old, &tmp, objectid);
- if (ret)
- goto abort_trans;
-
+ /* clean up in any case */
btrfs_tree_unlock(old);
free_extent_buffer(old);
+ if (ret)
+ goto abort_trans_dput;
/* see comments in should_cow_block() */
root->force_cow = 1;
btrfs_tree_unlock(tmp);
free_extent_buffer(tmp);
if (ret)
- goto abort_trans;
+ goto abort_trans_dput;
/*
* insert root back/forward references
parent_root->root_key.objectid,
btrfs_ino(parent_inode), index,
dentry->d_name.name, dentry->d_name.len);
+ dput(parent);
if (ret)
goto fail;
- dput(parent);
key.offset = (u64)-1;
pending->snap = btrfs_read_fs_root_no_name(root->fs_info, &key);
- if (IS_ERR(pending->snap))
+ if (IS_ERR(pending->snap)) {
+ ret = PTR_ERR(pending->snap);
goto abort_trans;
+ }
ret = btrfs_reloc_post_snapshot(trans, pending);
if (ret)
btrfs_block_rsv_release(root, &pending->block_rsv, (u64)-1);
return ret;
+abort_trans_dput:
+ dput(parent);
abort_trans:
btrfs_abort_transaction(trans, root, ret);
goto fail;
BTRFS_TREE_LOG_OBJECTID);
ret = btrfs_free_and_pin_reserved_extent(root,
bytenr, blocksize);
- BUG_ON(ret);
+ BUG_ON(ret); /* -ENOMEM or logic errors */
}
free_extent_buffer(next);
continue;
wret = walk_down_log_tree(trans, log, path, &level, wc);
if (wret > 0)
break;
- if (wret < 0)
+ if (wret < 0) {
ret = wret;
+ goto out;
+ }
wret = walk_up_log_tree(trans, log, path, &level, wc);
if (wret > 0)
break;
- if (wret < 0)
+ if (wret < 0) {
ret = wret;
+ goto out;
+ }
}
/* was the root node processed? if not, catch it here */
if (path->nodes[orig_level]) {
- wc->process_func(log, path->nodes[orig_level], wc,
+ ret = wc->process_func(log, path->nodes[orig_level], wc,
btrfs_header_generation(path->nodes[orig_level]));
+ if (ret)
+ goto out;
if (wc->free) {
struct extent_buffer *next;
BTRFS_TREE_LOG_OBJECTID);
ret = btrfs_free_and_pin_reserved_extent(log, next->start,
next->len);
- BUG_ON(ret);
+ BUG_ON(ret); /* -ENOMEM or logic errors */
}
}
+out:
for (i = 0; i <= orig_level; i++) {
if (path->nodes[i]) {
free_extent_buffer(path->nodes[i]);
* wait for them until later.
*/
ret = btrfs_write_marked_extents(log, &log->dirty_log_pages, mark);
- BUG_ON(ret);
+ if (ret) {
+ btrfs_abort_transaction(trans, root, ret);
+ mutex_unlock(&root->log_mutex);
+ goto out;
+ }
btrfs_set_root_node(&log->root_item, log->node);
}
if (ret) {
- BUG_ON(ret != -ENOSPC);
+ if (ret != -ENOSPC) {
+ btrfs_abort_transaction(trans, root, ret);
+ mutex_unlock(&log_root_tree->log_mutex);
+ goto out;
+ }
root->fs_info->last_trans_log_full_commit = trans->transid;
btrfs_wait_marked_extents(log, &log->dirty_log_pages, mark);
mutex_unlock(&log_root_tree->log_mutex);
ret = btrfs_write_and_wait_marked_extents(log_root_tree,
&log_root_tree->dirty_log_pages,
EXTENT_DIRTY | EXTENT_NEW);
- BUG_ON(ret);
+ if (ret) {
+ btrfs_abort_transaction(trans, root, ret);
+ mutex_unlock(&log_root_tree->log_mutex);
+ goto out_wake_log_root;
+ }
btrfs_wait_marked_extents(log, &log->dirty_log_pages, mark);
btrfs_set_super_log_root(root->fs_info->super_for_commit,
if (ret == -ENOSPC) {
root->fs_info->last_trans_log_full_commit = trans->transid;
ret = 0;
- }
+ } else if (ret < 0)
+ btrfs_abort_transaction(trans, root, ret);
+
btrfs_end_log_trans(root);
return err;
if (ret == -ENOSPC) {
root->fs_info->last_trans_log_full_commit = trans->transid;
ret = 0;
- }
+ } else if (ret < 0 && ret != -ENOENT)
+ btrfs_abort_transaction(trans, root, ret);
btrfs_end_log_trans(root);
return ret;
fs_info->log_root_recovering = 1;
trans = btrfs_start_transaction(fs_info->tree_root, 0);
- BUG_ON(IS_ERR(trans));
+ if (IS_ERR(trans)) {
+ ret = PTR_ERR(trans);
+ goto error;
+ }
wc.trans = trans;
wc.pin = 1;
ret = walk_log_tree(trans, log_root_tree, &wc);
- BUG_ON(ret);
+ if (ret) {
+ btrfs_error(fs_info, ret, "Failed to pin buffers while "
+ "recovering log root tree.");
+ goto error;
+ }
again:
key.objectid = BTRFS_TREE_LOG_OBJECTID;
while (1) {
ret = btrfs_search_slot(NULL, log_root_tree, &key, path, 0, 0);
- if (ret < 0)
- break;
+
+ if (ret < 0) {
+ btrfs_error(fs_info, ret,
+ "Couldn't find tree log root.");
+ goto error;
+ }
if (ret > 0) {
if (path->slots[0] == 0)
break;
log = btrfs_read_fs_root_no_radix(log_root_tree,
&found_key);
- BUG_ON(IS_ERR(log));
+ if (IS_ERR(log)) {
+ ret = PTR_ERR(log);
+ btrfs_error(fs_info, ret,
+ "Couldn't read tree log root.");
+ goto error;
+ }
tmp_key.objectid = found_key.offset;
tmp_key.type = BTRFS_ROOT_ITEM_KEY;
tmp_key.offset = (u64)-1;
wc.replay_dest = btrfs_read_fs_root_no_name(fs_info, &tmp_key);
- BUG_ON(IS_ERR_OR_NULL(wc.replay_dest));
+ if (IS_ERR(wc.replay_dest)) {
+ ret = PTR_ERR(wc.replay_dest);
+ btrfs_error(fs_info, ret, "Couldn't read target root "
+ "for tree log recovery.");
+ goto error;
+ }
wc.replay_dest->log_root = log;
btrfs_record_root_in_trans(trans, wc.replay_dest);
kfree(log_root_tree);
return 0;
+
+error:
+ btrfs_free_path(path);
+ return ret;
}
/*
fs_devices->num_can_discard--;
new_device = kmalloc(sizeof(*new_device), GFP_NOFS);
- BUG_ON(!new_device);
+ BUG_ON(!new_device); /* -ENOMEM */
memcpy(new_device, device, sizeof(*new_device));
new_device->name = kstrdup(device->name, GFP_NOFS);
- BUG_ON(device->name && !new_device->name);
+ BUG_ON(device->name && !new_device->name); /* -ENOMEM */
new_device->bdev = NULL;
new_device->writeable = 0;
new_device->in_fs_metadata = 0;
leaf = path->nodes[0];
extent = btrfs_item_ptr(leaf, path->slots[0],
struct btrfs_dev_extent);
+ } else {
+ btrfs_error(root->fs_info, ret, "Slot search failed");
+ goto out;
}
- BUG_ON(ret);
if (device->bytes_used > 0) {
u64 len = btrfs_dev_extent_length(leaf, extent);
spin_unlock(&root->fs_info->free_chunk_lock);
}
ret = btrfs_del_item(trans, root, path);
-
+ if (ret) {
+ btrfs_error(root->fs_info, ret,
+ "Failed to remove dev extent item");
+ }
out:
btrfs_free_path(path);
return ret;
if (ret < 0)
goto error;
- BUG_ON(ret == 0);
+ BUG_ON(ret == 0); /* Corruption */
ret = btrfs_previous_item(root, path, 0, BTRFS_CHUNK_ITEM_KEY);
if (ret) {
if (ret < 0)
goto error;
- BUG_ON(ret == 0);
+ BUG_ON(ret == 0); /* Corruption */
ret = btrfs_previous_item(root, path, BTRFS_DEV_ITEMS_OBJECTID,
BTRFS_DEV_ITEM_KEY);
(unsigned long)btrfs_device_fsid(dev_item),
BTRFS_UUID_SIZE);
device = btrfs_find_device(root, devid, dev_uuid, fs_uuid);
- BUG_ON(!device);
+ BUG_ON(!device); /* Logic error */
if (device->fs_devices->seeding) {
btrfs_set_device_generation(leaf, dev_item,
if (seeding_dev) {
sb->s_flags &= ~MS_RDONLY;
ret = btrfs_prepare_sprout(root);
- BUG_ON(ret);
+ BUG_ON(ret); /* -ENOMEM */
}
device->fs_devices = root->fs_info->fs_devices;
if (seeding_dev) {
ret = init_first_rw_device(trans, root, device);
- BUG_ON(ret);
+ if (ret)
+ goto error_trans;
ret = btrfs_finish_sprout(trans, root);
- BUG_ON(ret);
+ if (ret)
+ goto error_trans;
} else {
ret = btrfs_add_device(trans, root, device);
+ if (ret)
+ goto error_trans;
}
/*
btrfs_clear_space_info_full(root->fs_info);
unlock_chunks(root);
- btrfs_commit_transaction(trans, root);
+ ret = btrfs_commit_transaction(trans, root);
if (seeding_dev) {
mutex_unlock(&uuid_mutex);
up_write(&sb->s_umount);
+ if (ret) /* transaction commit */
+ return ret;
+
ret = btrfs_relocate_sys_chunks(root);
- BUG_ON(ret);
+ if (ret < 0)
+ btrfs_error(root->fs_info, ret,
+ "Failed to relocate sys chunks after "
+ "device initialization. This can be fixed "
+ "using the \"btrfs balance\" command.");
}
return ret;
+
+error_trans:
+ unlock_chunks(root);
+ btrfs_abort_transaction(trans, root, ret);
+ btrfs_end_transaction(trans, root);
+ kfree(device->name);
+ kfree(device);
error:
blkdev_put(bdev, FMODE_EXCL);
if (seeding_dev) {
key.type = BTRFS_CHUNK_ITEM_KEY;
ret = btrfs_search_slot(trans, root, &key, path, -1, 1);
- BUG_ON(ret);
+ if (ret < 0)
+ goto out;
+ else if (ret > 0) { /* Logic error or corruption */
+ btrfs_error(root->fs_info, -ENOENT,
+ "Failed lookup while freeing chunk.");
+ ret = -ENOENT;
+ goto out;
+ }
ret = btrfs_del_item(trans, root, path);
-
+ if (ret < 0)
+ btrfs_error(root->fs_info, ret,
+ "Failed to delete chunk item.");
+out:
btrfs_free_path(path);
return ret;
}
ret = btrfs_search_slot(NULL, chunk_root, &key, path, 0, 0);
if (ret < 0)
goto error;
- BUG_ON(ret == 0);
+ BUG_ON(ret == 0); /* Corruption */
ret = btrfs_previous_item(chunk_root, path, key.objectid,
key.type);
ret = btrfs_make_block_group(trans, extent_root, 0, type,
BTRFS_FIRST_CHUNK_TREE_OBJECTID,
start, num_bytes);
- BUG_ON(ret);
+ if (ret)
+ goto error;
for (i = 0; i < map->num_stripes; ++i) {
struct btrfs_device *device;
info->chunk_root->root_key.objectid,
BTRFS_FIRST_CHUNK_TREE_OBJECTID,
start, dev_offset, stripe_size);
- BUG_ON(ret);
+ if (ret) {
+ btrfs_abort_transaction(trans, extent_root, ret);
+ goto error;
+ }
}
kfree(devices_info);
ret = __finish_chunk_alloc(trans, extent_root, map, chunk_offset,
chunk_size, stripe_size);
- BUG_ON(ret);
+ if (ret)
+ return ret;
return 0;
}
ret = __btrfs_alloc_chunk(trans, extent_root, &map, &chunk_size,
&stripe_size, chunk_offset, alloc_profile);
- BUG_ON(ret);
+ if (ret)
+ return ret;
sys_chunk_offset = chunk_offset + chunk_size;
ret = __btrfs_alloc_chunk(trans, extent_root, &sys_map,
&sys_chunk_size, &sys_stripe_size,
sys_chunk_offset, alloc_profile);
- BUG_ON(ret);
+ if (ret)
+ goto abort;
ret = btrfs_add_device(trans, fs_info->chunk_root, device);
- BUG_ON(ret);
+ if (ret)
+ goto abort;
/*
* Modifying chunk tree needs allocating new blocks from both
*/
ret = __finish_chunk_alloc(trans, extent_root, map, chunk_offset,
chunk_size, stripe_size);
- BUG_ON(ret);
+ if (ret)
+ goto abort;
ret = __finish_chunk_alloc(trans, extent_root, sys_map,
sys_chunk_offset, sys_chunk_size,
sys_stripe_size);
- BUG_ON(ret);
+ if (ret)
+ goto abort;
+
return 0;
+
+abort:
+ btrfs_abort_transaction(trans, root, ret);
+ return ret;
}
int btrfs_chunk_readonly(struct btrfs_root *root, u64 chunk_offset)
do_div(length, map->num_stripes);
buf = kzalloc(sizeof(u64) * map->num_stripes, GFP_NOFS);
- BUG_ON(!buf);
+ BUG_ON(!buf); /* -ENOMEM */
for (i = 0; i < map->num_stripes; i++) {
if (devid && map->stripes[i].dev->devid != devid)
ret = btrfs_map_block(map_tree, rw, logical, &map_length, &bbio,
mirror_num);
- BUG_ON(ret);
+ if (ret) /* -ENOMEM */
+ return ret;
total_devs = bbio->num_stripes;
if (map_length < length) {
while (dev_nr < total_devs) {
if (dev_nr < total_devs - 1) {
bio = bio_clone(first_bio, GFP_NOFS);
- BUG_ON(!bio);
+ BUG_ON(!bio); /* -ENOMEM */
} else {
bio = first_bio;
}
write_lock(&map_tree->map_tree.lock);
ret = add_extent_mapping(&map_tree->map_tree, em);
write_unlock(&map_tree->map_tree.lock);
- BUG_ON(ret);
+ BUG_ON(ret); /* Tree corruption */
free_extent_map(em);
return 0;
projects / mirror_ubuntu-kernels.git / commitdiff