Btrfs: Audit callers and return codes to make sure -ENOSPC gets up the stack
Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
index 498dea0..606a19b 100644
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -73,6 +73,7 @@
{
struct buffer_head *cow;
struct btrfs_node *cow_node;
+ int ret;
if (btrfs_header_generation(btrfs_buffer_header(buf)) ==
trans->transid) {
@@ -80,6 +81,8 @@
return 0;
}
cow = btrfs_alloc_free_block(trans, root, buf->b_blocknr);
+ if (IS_ERR(cow))
+ return PTR_ERR(cow);
cow_node = btrfs_buffer_node(cow);
if (buf->b_size != root->blocksize || cow->b_size != root->blocksize)
WARN_ON(1);
@@ -87,7 +90,9 @@
btrfs_set_header_blocknr(&cow_node->header, bh_blocknr(cow));
btrfs_set_header_generation(&cow_node->header, trans->transid);
btrfs_set_header_owner(&cow_node->header, root->root_key.objectid);
- btrfs_inc_ref(trans, root, buf);
+ ret = btrfs_inc_ref(trans, root, buf);
+ if (ret)
+ return ret;
if (buf == root->node) {
root->node = cow;
get_bh(cow);
@@ -320,6 +325,7 @@
int wret;
int pslot;
int orig_slot = path->slots[level];
+ int err_on_enospc = 0;
u64 orig_ptr;
if (level == 0)
@@ -363,29 +369,43 @@
BTRFS_NODEPTRS_PER_BLOCK(root) / 4)
return 0;
+ if (btrfs_header_nritems(&mid->header) < 2)
+ err_on_enospc = 1;
+
left_buf = read_node_slot(root, parent_buf, pslot - 1);
right_buf = read_node_slot(root, parent_buf, pslot + 1);
/* first, try to make some room in the middle buffer */
if (left_buf) {
- btrfs_cow_block(trans, root, left_buf, parent_buf, pslot - 1,
- &left_buf);
+ wret = btrfs_cow_block(trans, root, left_buf,
+ parent_buf, pslot - 1, &left_buf);
+ if (wret) {
+ ret = wret;
+ goto enospc;
+ }
left = btrfs_buffer_node(left_buf);
orig_slot += btrfs_header_nritems(&left->header);
wret = push_node_left(trans, root, left_buf, mid_buf);
if (wret < 0)
ret = wret;
+ if (btrfs_header_nritems(&mid->header) < 2)
+ err_on_enospc = 1;
}
/*
* then try to empty the right most buffer into the middle
*/
if (right_buf) {
- btrfs_cow_block(trans, root, right_buf, parent_buf, pslot + 1,
- &right_buf);
+ wret = btrfs_cow_block(trans, root, right_buf,
+ parent_buf, pslot + 1, &right_buf);
+ if (wret) {
+ ret = wret;
+ goto enospc;
+ }
+
right = btrfs_buffer_node(right_buf);
wret = push_node_left(trans, root, mid_buf, right_buf);
- if (wret < 0)
+ if (wret < 0 && wret != -ENOSPC)
ret = wret;
if (btrfs_header_nritems(&right->header) == 0) {
u64 blocknr = bh_blocknr(right_buf);
@@ -421,8 +441,10 @@
*/
BUG_ON(!left_buf);
wret = balance_node_right(trans, root, mid_buf, left_buf);
- if (wret < 0)
+ if (wret < 0) {
ret = wret;
+ goto enospc;
+ }
BUG_ON(wret == 1);
}
if (btrfs_header_nritems(&mid->header) == 0) {
@@ -467,7 +489,7 @@
btrfs_node_blockptr(btrfs_buffer_node(path->nodes[level]),
path->slots[level]))
BUG();
-
+enospc:
if (right_buf)
btrfs_block_release(root, right_buf);
if (left_buf)
@@ -519,10 +541,15 @@
if (left_nr >= BTRFS_NODEPTRS_PER_BLOCK(root) - 1) {
wret = 1;
} else {
- btrfs_cow_block(trans, root, left_buf, parent_buf,
- pslot - 1, &left_buf);
- left = btrfs_buffer_node(left_buf);
- wret = push_node_left(trans, root, left_buf, mid_buf);
+ ret = btrfs_cow_block(trans, root, left_buf, parent_buf,
+ pslot - 1, &left_buf);
+ if (ret)
+ wret = 1;
+ else {
+ left = btrfs_buffer_node(left_buf);
+ wret = push_node_left(trans, root,
+ left_buf, mid_buf);
+ }
}
if (wret < 0)
ret = wret;
@@ -561,11 +588,16 @@
if (right_nr >= BTRFS_NODEPTRS_PER_BLOCK(root) - 1) {
wret = 1;
} else {
- btrfs_cow_block(trans, root, right_buf,
- parent_buf, pslot + 1, &right_buf);
- right = btrfs_buffer_node(right_buf);
- wret = balance_node_right(trans, root,
- right_buf, mid_buf);
+ ret = btrfs_cow_block(trans, root, right_buf,
+ parent_buf, pslot + 1,
+ &right_buf);
+ if (ret)
+ wret = 1;
+ else {
+ right = btrfs_buffer_node(right_buf);
+ wret = balance_node_right(trans, root,
+ right_buf, mid_buf);
+ }
}
if (wret < 0)
ret = wret;
@@ -631,6 +663,10 @@
p->nodes[level + 1],
p->slots[level + 1],
&cow_buf);
+ if (wret) {
+ btrfs_block_release(root, cow_buf);
+ return wret;
+ }
b = cow_buf;
c = btrfs_buffer_node(b);
}
@@ -737,6 +773,7 @@
src_nritems = btrfs_header_nritems(&src->header);
dst_nritems = btrfs_header_nritems(&dst->header);
push_items = BTRFS_NODEPTRS_PER_BLOCK(root) - dst_nritems;
+
if (push_items <= 0) {
return 1;
}
@@ -827,6 +864,8 @@
BUG_ON(path->nodes[level-1] != root->node);
t = btrfs_alloc_free_block(trans, root, root->node->b_blocknr);
+ if (IS_ERR(t))
+ return PTR_ERR(t);
c = btrfs_buffer_node(t);
memset(c, 0, root->blocksize);
btrfs_set_header_nritems(&c->header, 1);
@@ -929,10 +968,15 @@
btrfs_header_nritems(&c->header) <
BTRFS_NODEPTRS_PER_BLOCK(root) - 1)
return 0;
+ if (ret < 0)
+ return ret;
}
c_nritems = btrfs_header_nritems(&c->header);
split_buffer = btrfs_alloc_free_block(trans, root, t->b_blocknr);
+ if (IS_ERR(split_buffer))
+ return PTR_ERR(split_buffer);
+
split = btrfs_buffer_node(split_buffer);
btrfs_set_header_flags(&split->header, btrfs_header_flags(&c->header));
btrfs_set_header_level(&split->header, btrfs_header_level(&c->header));
@@ -1022,6 +1066,7 @@
struct btrfs_item *item;
u32 left_nritems;
u32 right_nritems;
+ int ret;
slot = path->slots[1];
if (!path->nodes[1]) {
@@ -1041,7 +1086,12 @@
return 1;
}
/* cow and double check */
- btrfs_cow_block(trans, root, right_buf, upper, slot + 1, &right_buf);
+ ret = btrfs_cow_block(trans, root, right_buf, upper,
+ slot + 1, &right_buf);
+ if (ret) {
+ btrfs_block_release(root, right_buf);
+ return 1;
+ }
right = btrfs_buffer_leaf(right_buf);
free_space = btrfs_leaf_free_space(root, right);
if (free_space < data_size + sizeof(struct btrfs_item)) {
@@ -1162,7 +1212,11 @@
}
/* cow and double check */
- btrfs_cow_block(trans, root, t, path->nodes[1], slot - 1, &t);
+ ret = btrfs_cow_block(trans, root, t, path->nodes[1], slot - 1, &t);
+ if (ret) {
+ /* we hit -ENOSPC, but it isn't fatal here */
+ return 1;
+ }
left = btrfs_buffer_leaf(t);
free_space = btrfs_leaf_free_space(root, left);
if (free_space < data_size + sizeof(struct btrfs_item)) {
@@ -1309,8 +1363,11 @@
slot = path->slots[0];
nritems = btrfs_header_nritems(&l->header);
mid = (nritems + 1)/ 2;
+
right_buffer = btrfs_alloc_free_block(trans, root, l_buf->b_blocknr);
- BUG_ON(!right_buffer);
+ if (IS_ERR(right_buffer))
+ return PTR_ERR(right_buffer);
+
right = btrfs_buffer_leaf(right_buffer);
memset(&right->header, 0, sizeof(right->header));
btrfs_set_header_blocknr(&right->header, bh_blocknr(right_buffer));
@@ -1407,7 +1464,9 @@
if (!double_split)
return ret;
right_buffer = btrfs_alloc_free_block(trans, root, l_buf->b_blocknr);
- BUG_ON(!right_buffer);
+ if (IS_ERR(right_buffer))
+ return PTR_ERR(right_buffer);
+
right = btrfs_buffer_leaf(right_buffer);
memset(&right->header, 0, sizeof(right->header));
btrfs_set_header_blocknr(&right->header, bh_blocknr(right_buffer));
@@ -1655,7 +1714,6 @@
ptr, data, data_size);
btrfs_mark_buffer_dirty(path->nodes[0]);
}
- btrfs_release_path(root, path);
btrfs_free_path(path);
return ret;
}
@@ -1775,12 +1833,12 @@
slot = path->slots[1];
get_bh(leaf_buf);
wret = push_leaf_left(trans, root, path, 1);
- if (wret < 0)
+ if (wret < 0 && wret != -ENOSPC)
ret = wret;
if (path->nodes[0] == leaf_buf &&
btrfs_header_nritems(&leaf->header)) {
wret = push_leaf_right(trans, root, path, 1);
- if (wret < 0)
+ if (wret < 0 && wret != -ENOSPC)
ret = wret;
}
if (btrfs_header_nritems(&leaf->header) == 0) {
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 19a1d99..77071f2 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -1126,9 +1126,6 @@
struct btrfs_root *root,
u64 objectid, u64 offset,
char *data, size_t len);
-int btrfs_csum_verify_file_block(struct btrfs_root *root,
- u64 objectid, u64 offset,
- char *data, size_t len);
struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct btrfs_path *path,
diff --git a/fs/btrfs/dir-item.c b/fs/btrfs/dir-item.c
index ff10cf5..d5db8bd 100644
--- a/fs/btrfs/dir-item.c
+++ b/fs/btrfs/dir-item.c
@@ -47,6 +47,8 @@
if (ret)
return ERR_PTR(ret);
}
+ if (ret < 0)
+ return ERR_PTR(ret);
WARN_ON(ret > 0);
leaf = btrfs_buffer_leaf(path->nodes[0]);
item = leaf->items + path->slots[0];
@@ -225,14 +227,13 @@
struct btrfs_leaf *leaf;
u32 sub_item_len;
u32 item_len;
- int ret;
+ int ret = 0;
leaf = btrfs_buffer_leaf(path->nodes[0]);
sub_item_len = sizeof(*di) + btrfs_dir_name_len(di);
item_len = btrfs_item_size(leaf->items + path->slots[0]);
if (sub_item_len == btrfs_item_size(leaf->items + path->slots[0])) {
ret = btrfs_del_item(trans, root, path);
- BUG_ON(ret);
} else {
char *ptr = (char *)di;
char *start = btrfs_item_ptr(leaf, path->slots[0], char);
@@ -240,7 +241,6 @@
item_len - (ptr + sub_item_len - start));
ret = btrfs_truncate_item(trans, root, path,
item_len - sub_item_len);
- BUG_ON(ret);
}
return 0;
}
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 3712e94..865a284 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -580,7 +580,7 @@
btrfs_transaction_flush_work(root);
mutex_lock(&fs_info->fs_mutex);
trans = btrfs_start_transaction(root, 1);
- btrfs_commit_transaction(trans, root);
+ ret = btrfs_commit_transaction(trans, root);
/* run commit again to drop the original snapshot */
trans = btrfs_start_transaction(root, 1);
btrfs_commit_transaction(trans, root);
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index b38c3e9..8025e9f 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -100,6 +100,8 @@
if (slot >= btrfs_header_nritems(&leaf->header)) {
reada_extent_leaves(root, path, limit);
ret = btrfs_next_leaf(root, path);
+ if (ret < 0)
+ goto err;
if (ret == 0) {
continue;
} else {
@@ -148,6 +150,7 @@
}
block_group->cached = 1;
+err:
btrfs_free_path(path);
return 0;
}
@@ -201,7 +204,9 @@
last = max(last, cache->last_prealloc);
}
again:
- cache_block_group(root, cache);
+ ret = cache_block_group(root, cache);
+ if (ret)
+ goto out;
while(1) {
ret = find_first_radix_bit(&root->fs_info->extent_map_radix,
gang, last, ARRAY_SIZE(gang));
@@ -398,16 +403,23 @@
struct btrfs_key ins;
u32 refs;
- find_free_extent(trans, root->fs_info->extent_root, 0, 0, (u64)-1, 0,
- &ins, 0);
path = btrfs_alloc_path();
- BUG_ON(!path);
+ if (!path)
+ return -ENOMEM;
+ ret = find_free_extent(trans, root->fs_info->extent_root, 0, 0,
+ (u64)-1, 0, &ins, 0);
+ if (ret) {
+ btrfs_free_path(path);
+ return ret;
+ }
key.objectid = blocknr;
key.flags = 0;
btrfs_set_key_type(&key, BTRFS_EXTENT_ITEM_KEY);
key.offset = num_blocks;
ret = btrfs_search_slot(trans, root->fs_info->extent_root, &key, path,
0, 1);
+ if (ret < 0)
+ return ret;
if (ret != 0) {
BUG();
}
@@ -442,12 +454,14 @@
btrfs_set_key_type(&key, BTRFS_EXTENT_ITEM_KEY);
ret = btrfs_search_slot(trans, root->fs_info->extent_root, &key, path,
0, 0);
+ if (ret < 0)
+ goto out;
if (ret != 0)
BUG();
l = btrfs_buffer_leaf(path->nodes[0]);
item = btrfs_item_ptr(l, path->slots[0], struct btrfs_extent_item);
*refs = btrfs_extent_refs(item);
- btrfs_release_path(root->fs_info->extent_root, path);
+out:
btrfs_free_path(path);
return 0;
}
@@ -469,6 +483,8 @@
int i;
int leaf;
int ret;
+ int faili;
+ int err;
if (!root->ref_cows)
return 0;
@@ -491,14 +507,45 @@
continue;
ret = btrfs_inc_extent_ref(trans, root, disk_blocknr,
btrfs_file_extent_disk_num_blocks(fi));
- BUG_ON(ret);
+ if (ret) {
+ faili = i;
+ goto fail;
+ }
} else {
blocknr = btrfs_node_blockptr(buf_node, i);
ret = btrfs_inc_extent_ref(trans, root, blocknr, 1);
- BUG_ON(ret);
+ if (ret) {
+ faili = i;
+ goto fail;
+ }
}
}
return 0;
+fail:
+ for (i =0; i < faili; i++) {
+ if (leaf) {
+ u64 disk_blocknr;
+ key = &buf_leaf->items[i].key;
+ if (btrfs_disk_key_type(key) != BTRFS_EXTENT_DATA_KEY)
+ continue;
+ fi = btrfs_item_ptr(buf_leaf, i,
+ struct btrfs_file_extent_item);
+ if (btrfs_file_extent_type(fi) ==
+ BTRFS_FILE_EXTENT_INLINE)
+ continue;
+ disk_blocknr = btrfs_file_extent_disk_blocknr(fi);
+ if (disk_blocknr == 0)
+ continue;
+ err = btrfs_free_extent(trans, root, disk_blocknr,
+ btrfs_file_extent_disk_num_blocks(fi), 0);
+ BUG_ON(err);
+ } else {
+ blocknr = btrfs_node_blockptr(buf_node, i);
+ err = btrfs_free_extent(trans, root, blocknr, 1, 0);
+ BUG_ON(err);
+ }
+ }
+ return ret;
}
static int write_one_cache_group(struct btrfs_trans_handle *trans,
@@ -512,15 +559,20 @@
struct btrfs_block_group_item *bi;
struct btrfs_key ins;
- find_free_extent(trans, extent_root, 0, 0, (u64)-1, 0, &ins, 0);
+ ret = find_free_extent(trans, extent_root, 0, 0, (u64)-1, 0, &ins, 0);
+ /* FIXME, set bit to recalc cache groups on next mount */
+ if (ret)
+ return ret;
ret = btrfs_search_slot(trans, extent_root, &cache->key, path, 0, 1);
+ if (ret < 0)
+ goto fail;
BUG_ON(ret);
bi = btrfs_item_ptr(btrfs_buffer_leaf(path->nodes[0]), path->slots[0],
struct btrfs_block_group_item);
memcpy(bi, &cache->item, sizeof(*bi));
mark_buffer_dirty(path->nodes[0]);
btrfs_release_path(extent_root, path);
-
+fail:
finish_current_insert(trans, extent_root);
pending_ret = del_pending_extents(trans, extent_root);
if (ret)
@@ -543,6 +595,7 @@
int werr = 0;
int i;
struct btrfs_path *path;
+ unsigned long off = 0;
path = btrfs_alloc_path();
if (!path)
@@ -550,18 +603,28 @@
while(1) {
ret = radix_tree_gang_lookup_tag(radix, (void **)cache,
- 0, ARRAY_SIZE(cache),
+ off, ARRAY_SIZE(cache),
BTRFS_BLOCK_GROUP_DIRTY);
if (!ret)
break;
for (i = 0; i < ret; i++) {
+ err = write_one_cache_group(trans, root,
+ path, cache[i]);
+ /*
+ * if we fail to write the cache group, we want
+ * to keep it marked dirty in hopes that a later
+ * write will work
+ */
+ if (err) {
+ werr = err;
+ off = cache[i]->key.objectid +
+ cache[i]->key.offset;
+ continue;
+ }
+
radix_tree_tag_clear(radix, cache[i]->key.objectid +
cache[i]->key.offset - 1,
BTRFS_BLOCK_GROUP_DIRTY);
- err = write_one_cache_group(trans, root,
- path, cache[i]);
- if (err)
- werr = err;
}
}
btrfs_free_path(path);
@@ -801,14 +864,20 @@
btrfs_set_key_type(&key, BTRFS_EXTENT_ITEM_KEY);
key.offset = num_blocks;
- find_free_extent(trans, root, 0, 0, (u64)-1, 0, &ins, 0);
path = btrfs_alloc_path();
- BUG_ON(!path);
+ if (!path)
+ return -ENOMEM;
+
+ ret = find_free_extent(trans, root, 0, 0, (u64)-1, 0, &ins, 0);
+ if (ret) {
+ btrfs_free_path(path);
+ return ret;
+ }
ret = btrfs_search_slot(trans, extent_root, &key, path, -1, 1);
- if (ret) {
- BUG();
- }
+ if (ret < 0)
+ return ret;
+ BUG_ON(ret);
ei = btrfs_item_ptr(btrfs_buffer_leaf(path->nodes[0]), path->slots[0],
struct btrfs_extent_item);
BUG_ON(ei->refs == 0);
@@ -827,8 +896,9 @@
btrfs_set_super_blocks_used(info->disk_super,
super_blocks_used - num_blocks);
ret = btrfs_del_item(trans, extent_root, path);
- if (ret)
- BUG();
+ if (ret) {
+ return ret;
+ }
ret = update_block_group(trans, root, blocknr, num_blocks, 0,
mark_free, 0);
BUG_ON(ret);
@@ -1075,7 +1145,6 @@
path->slots[0]++;
cond_resched();
}
- // FIXME -ENOSPC
check_pending:
/* we have to make sure we didn't find an extent that has already
* been allocated by the map tree or the original allocation
@@ -1246,7 +1315,15 @@
ret = find_free_extent(trans, root, num_blocks, search_start,
search_end, hint_block, ins, data);
if (ret) {
- return ret;
+ if (search_start == 0)
+ return ret;
+ search_end = search_start - 1;
+ search_start = 0;
+ hint_block = search_start;
+ ret = find_free_extent(trans, root, num_blocks, search_start,
+ search_end, hint_block, ins, data);
+ if (ret)
+ return ret;
}
/*
@@ -1271,7 +1348,16 @@
search_end, hint_block,
&prealloc_key, 0);
if (ret) {
- return ret;
+ if (search_start == 0)
+ return ret;
+ search_end = search_start - 1;
+ search_start = 0;
+ hint_block = search_start;
+ ret = find_free_extent(trans, root, 0, search_start,
+ search_end, hint_block,
+ &prealloc_key, 0);
+ if (ret)
+ return ret;
}
}
@@ -1309,11 +1395,14 @@
ret = btrfs_alloc_extent(trans, root, root->root_key.objectid,
1, hint, (unsigned long)-1, &ins, 0);
if (ret) {
- BUG();
- return NULL;
+ BUG_ON(ret > 0);
+ return ERR_PTR(ret);
}
- BUG_ON(ret);
buf = btrfs_find_create_tree_block(root, ins.objectid);
+ if (!buf) {
+ btrfs_free_extent(trans, root, ins.objectid, 1, 0);
+ return ERR_PTR(-ENOMEM);
+ }
set_buffer_uptodate(buf);
set_buffer_checked(buf);
set_radix_bit(&trans->transaction->dirty_pages, buf->b_page->index);
diff --git a/fs/btrfs/file-item.c b/fs/btrfs/file-item.c
index cf894f0..6885993 100644
--- a/fs/btrfs/file-item.c
+++ b/fs/btrfs/file-item.c
@@ -45,6 +45,8 @@
ret = btrfs_insert_empty_item(trans, root, path, &file_key,
sizeof(*item));
+ if (ret < 0)
+ goto out;
BUG_ON(ret);
item = btrfs_item_ptr(btrfs_buffer_leaf(path->nodes[0]), path->slots[0],
struct btrfs_file_extent_item);
@@ -55,10 +57,9 @@
btrfs_set_file_extent_generation(item, trans->transid);
btrfs_set_file_extent_type(item, BTRFS_FILE_EXTENT_REG);
btrfs_mark_buffer_dirty(path->nodes[0]);
-
- btrfs_release_path(root, path);
+out:
btrfs_free_path(path);
- return 0;
+ return ret;
}
struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
@@ -213,6 +214,8 @@
csum_offset = 0;
ret = btrfs_insert_empty_item(trans, root, path, &file_key,
BTRFS_CRC32_SIZE);
+ if (ret < 0)
+ goto fail;
if (ret != 0) {
WARN_ON(1);
goto fail;
@@ -261,40 +264,3 @@
return ret;
}
-int btrfs_csum_verify_file_block(struct btrfs_root *root,
- u64 objectid, u64 offset,
- char *data, size_t len)
-{
- int ret;
- struct btrfs_key file_key;
- struct btrfs_path *path;
- struct btrfs_csum_item *item;
- char result[BTRFS_CRC32_SIZE];
-
- path = btrfs_alloc_path();
- BUG_ON(!path);
- file_key.objectid = objectid;
- file_key.offset = offset;
- file_key.flags = 0;
- btrfs_set_key_type(&file_key, BTRFS_CSUM_ITEM_KEY);
- mutex_lock(&root->fs_info->fs_mutex);
-
- item = btrfs_lookup_csum(NULL, root, path, objectid, offset, 0);
- if (IS_ERR(item)) {
- ret = PTR_ERR(item);
- /* a csum that isn't present is a preallocated region. */
- if (ret == -ENOENT || ret == -EFBIG)
- ret = -ENOENT;
- goto fail;
- }
-
- ret = btrfs_csum_data(root, data, len, result);
- WARN_ON(ret);
- if (memcmp(result, &item->csum, BTRFS_CRC32_SIZE))
- ret = 1;
-fail:
- btrfs_release_path(root, path);
- btrfs_free_path(path);
- mutex_unlock(&root->fs_info->fs_mutex);
- return ret;
-}
diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index 23f0293..fef7ba1 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -81,6 +81,62 @@
}
}
+static int insert_inline_extent(struct btrfs_root *root, struct inode *inode,
+ u64 offset, ssize_t size,
+ struct buffer_head *bh)
+{
+ struct btrfs_key key;
+ struct btrfs_path *path;
+ char *ptr, *kaddr;
+ struct btrfs_trans_handle *trans;
+ struct btrfs_file_extent_item *ei;
+ u32 datasize;
+ int err = 0;
+ int ret;
+
+ path = btrfs_alloc_path();
+ if (!path)
+ return -ENOMEM;
+
+ mutex_lock(&root->fs_info->fs_mutex);
+ trans = btrfs_start_transaction(root, 1);
+ btrfs_set_trans_block_group(trans, inode);
+
+ key.objectid = inode->i_ino;
+ key.offset = offset;
+ key.flags = 0;
+ btrfs_set_key_type(&key, BTRFS_EXTENT_DATA_KEY);
+ BUG_ON(size >= PAGE_CACHE_SIZE);
+ datasize = btrfs_file_extent_calc_inline_size(size);
+
+ ret = btrfs_insert_empty_item(trans, root, path, &key,
+ datasize);
+ if (ret) {
+ err = ret;
+ goto fail;
+ }
+ ei = btrfs_item_ptr(btrfs_buffer_leaf(path->nodes[0]),
+ path->slots[0], struct btrfs_file_extent_item);
+ btrfs_set_file_extent_generation(ei, trans->transid);
+ btrfs_set_file_extent_type(ei,
+ BTRFS_FILE_EXTENT_INLINE);
+ ptr = btrfs_file_extent_inline_start(ei);
+
+ kaddr = kmap_atomic(bh->b_page, KM_USER0);
+ btrfs_memcpy(root, path->nodes[0]->b_data,
+ ptr, kaddr + bh_offset(bh),
+ size);
+ kunmap_atomic(kaddr, KM_USER0);
+ mark_buffer_dirty(path->nodes[0]);
+fail:
+ btrfs_free_path(path);
+ ret = btrfs_end_transaction(trans, root);
+ if (ret && !err)
+ err = ret;
+ mutex_unlock(&root->fs_info->fs_mutex);
+ return err;
+}
+
static int dirty_and_release_pages(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct file *file,
@@ -96,57 +152,22 @@
int this_write;
struct inode *inode = file->f_path.dentry->d_inode;
struct buffer_head *bh;
- struct btrfs_file_extent_item *ei;
for (i = 0; i < num_pages; i++) {
offset = pos & (PAGE_CACHE_SIZE -1);
this_write = min((size_t)PAGE_CACHE_SIZE - offset, write_bytes);
- /* FIXME, one block at a time */
+ /* FIXME, one block at a time */
bh = page_buffers(pages[i]);
if (buffer_mapped(bh) && bh->b_blocknr == 0) {
- struct btrfs_key key;
- struct btrfs_path *path;
- char *ptr, *kaddr;
- u32 datasize;
-
- mutex_lock(&root->fs_info->fs_mutex);
- trans = btrfs_start_transaction(root, 1);
- btrfs_set_trans_block_group(trans, inode);
-
- /* create an inline extent, and copy the data in */
- path = btrfs_alloc_path();
- BUG_ON(!path);
- key.objectid = inode->i_ino;
- key.offset = pages[i]->index << PAGE_CACHE_SHIFT;
- key.flags = 0;
- btrfs_set_key_type(&key, BTRFS_EXTENT_DATA_KEY);
- BUG_ON(write_bytes >= PAGE_CACHE_SIZE);
- datasize = offset +
- btrfs_file_extent_calc_inline_size(write_bytes);
-
- ret = btrfs_insert_empty_item(trans, root, path, &key,
- datasize);
- BUG_ON(ret);
- ei = btrfs_item_ptr(btrfs_buffer_leaf(path->nodes[0]),
- path->slots[0], struct btrfs_file_extent_item);
- btrfs_set_file_extent_generation(ei, trans->transid);
- btrfs_set_file_extent_type(ei,
- BTRFS_FILE_EXTENT_INLINE);
- ptr = btrfs_file_extent_inline_start(ei);
-
- kaddr = kmap_atomic(bh->b_page, KM_USER0);
- btrfs_memcpy(root, path->nodes[0]->b_data,
- ptr, kaddr + bh_offset(bh),
- offset + write_bytes);
- kunmap_atomic(kaddr, KM_USER0);
-
- mark_buffer_dirty(path->nodes[0]);
- btrfs_free_path(path);
- ret = btrfs_end_transaction(trans, root);
- BUG_ON(ret);
- mutex_unlock(&root->fs_info->fs_mutex);
+ ret = insert_inline_extent(root, inode,
+ pages[i]->index << PAGE_CACHE_SHIFT,
+ offset + this_write, bh);
+ if (ret) {
+ err = ret;
+ goto failed;
+ }
}
ret = btrfs_commit_write(file, pages[i], offset,
@@ -321,6 +342,7 @@
btrfs_file_extent_disk_blocknr(extent);
}
ret = btrfs_del_item(trans, root, path);
+ /* TODO update progress marker and return */
BUG_ON(ret);
btrfs_release_path(root, path);
extent = NULL;
@@ -452,7 +474,8 @@
err = btrfs_drop_extents(trans, root, inode,
start_pos, (pos + write_bytes + root->blocksize -1) &
~((u64)root->blocksize - 1), &hint_block);
- BUG_ON(err);
+ if (err)
+ goto failed_release;
}
/* insert any holes we need to create */
@@ -469,7 +492,8 @@
last_pos_in_file,
0, 0, hole_size);
}
- BUG_ON(err);
+ if (err)
+ goto failed_release;
}
/*
@@ -481,11 +505,13 @@
err = btrfs_alloc_extent(trans, root, inode->i_ino,
num_blocks, hint_block, (u64)-1,
&ins, 1);
- BUG_ON(err);
+ if (err)
+ goto failed_truncate;
err = btrfs_insert_file_extent(trans, root, inode->i_ino,
start_pos, ins.objectid, ins.offset,
ins.offset);
- BUG_ON(err);
+ if (err)
+ goto failed_truncate;
} else {
ins.offset = 0;
ins.objectid = 0;
@@ -618,16 +644,21 @@
ret = prepare_pages(root, file, pages, num_pages,
pos, first_index, last_index,
write_bytes);
- BUG_ON(ret);
+ if (ret)
+ goto out;
ret = btrfs_copy_from_user(pos, num_pages,
write_bytes, pages, buf);
- BUG_ON(ret);
+ if (ret) {
+ btrfs_drop_pages(pages, num_pages);
+ goto out;
+ }
ret = dirty_and_release_pages(NULL, root, file, pages,
num_pages, pos, write_bytes);
- BUG_ON(ret);
btrfs_drop_pages(pages, num_pages);
+ if (ret)
+ goto out;
buf += write_bytes;
count -= write_bytes;
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 94f1c28..6d031da 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -212,7 +212,11 @@
struct btrfs_dir_item *di;
path = btrfs_alloc_path();
- BUG_ON(!path);
+ if (!path) {
+ ret = -ENOMEM;
+ goto err;
+ }
+
di = btrfs_lookup_dir_item(trans, root, path, dir->i_ino,
name, name_len, -1);
if (IS_ERR(di)) {
@@ -225,7 +229,8 @@
}
objectid = btrfs_disk_key_objectid(&di->location);
ret = btrfs_delete_one_dir_name(trans, root, path, di);
- BUG_ON(ret);
+ if (ret)
+ goto err;
btrfs_release_path(root, path);
di = btrfs_lookup_dir_index_item(trans, root, path, dir->i_ino,
@@ -239,7 +244,6 @@
goto err;
}
ret = btrfs_delete_one_dir_name(trans, root, path, di);
- BUG_ON(ret);
dentry->d_inode->i_ctime = dir->i_ctime;
err:
@@ -248,7 +252,7 @@
dir->i_size -= name_len * 2;
btrfs_update_inode(trans, root, dir);
drop_nlink(dentry->d_inode);
- btrfs_update_inode(trans, root, dentry->d_inode);
+ ret = btrfs_update_inode(trans, root, dentry->d_inode);
dir->i_sb->s_dirt = 1;
}
return ret;
@@ -359,9 +363,10 @@
BUG_ON(!path);
ret = btrfs_lookup_inode(trans, root, path,
&BTRFS_I(inode)->location, -1);
- BUG_ON(ret);
- ret = btrfs_del_item(trans, root, path);
- BUG_ON(ret);
+ if (ret > 0)
+ ret = -ENOENT;
+ if (!ret)
+ ret = btrfs_del_item(trans, root, path);
btrfs_free_path(path);
return ret;
}
@@ -516,7 +521,8 @@
}
if (del_item) {
ret = btrfs_del_item(trans, root, path);
- BUG_ON(ret);
+ if (ret)
+ goto error;
} else {
break;
}
@@ -577,19 +583,22 @@
page->index << PAGE_CACHE_SHIFT,
(page->index + 1) << PAGE_CACHE_SHIFT,
&alloc_hint);
- BUG_ON(ret);
+ if (ret)
+ goto out;
ret = btrfs_alloc_extent(trans, root, inode->i_ino, 1,
alloc_hint, (u64)-1, &ins, 1);
- BUG_ON(ret);
+ if (ret)
+ goto out;
ret = btrfs_insert_file_extent(trans, root, inode->i_ino,
page->index << PAGE_CACHE_SHIFT,
ins.objectid, 1, 1);
- BUG_ON(ret);
+ if (ret)
+ goto out;
SetPageChecked(page);
kaddr = kmap(page);
memset(kaddr + offset, 0, PAGE_CACHE_SIZE - offset);
flush_dcache_page(page);
- btrfs_csum_file_block(trans, root, inode->i_ino,
+ ret = btrfs_csum_file_block(trans, root, inode->i_ino,
page->index << PAGE_CACHE_SHIFT,
kaddr, PAGE_CACHE_SIZE);
kunmap(page);
@@ -633,9 +642,10 @@
btrfs_set_trans_block_group(trans, inode);
err = btrfs_insert_file_extent(trans, root, inode->i_ino,
pos, 0, 0, hole_size);
- BUG_ON(err);
btrfs_end_transaction(trans, root);
mutex_unlock(&root->fs_info->fs_mutex);
+ if (err)
+ return err;
}
out:
err = inode_setattr(inode, attr);
@@ -657,12 +667,20 @@
trans = btrfs_start_transaction(root, 1);
btrfs_set_trans_block_group(trans, inode);
ret = btrfs_truncate_in_trans(trans, root, inode);
- BUG_ON(ret);
- btrfs_free_inode(trans, root, inode);
+ if (ret)
+ goto no_delete_lock;
+ ret = btrfs_free_inode(trans, root, inode);
+ if (ret)
+ goto no_delete_lock;
btrfs_end_transaction(trans, root);
mutex_unlock(&root->fs_info->fs_mutex);
btrfs_btree_balance_dirty(root);
return;
+
+no_delete_lock:
+ btrfs_end_transaction(trans, root);
+ mutex_unlock(&root->fs_info->fs_mutex);
+ btrfs_btree_balance_dirty(root);
no_delete:
clear_inode(inode);
}
@@ -946,7 +964,7 @@
}
/*
- * This is somewhat expense, updating the tree every time the
+ * This is somewhat expensive, updating the tree every time the
* inode changes. But, it is most likely to find the inode in cache.
* FIXME, needs more benchmarking...there are no reasons other than performance
* to keep or drop this code.
@@ -1002,8 +1020,8 @@
btrfs_set_key_type(location, BTRFS_INODE_ITEM_KEY);
ret = btrfs_insert_inode(trans, root, objectid, &inode_item);
- BUG_ON(ret);
-
+ if (ret)
+ return ERR_PTR(ret);
insert_inode_hash(inode);
return inode;
}
@@ -1121,7 +1139,9 @@
drop_inode = 1;
dir->i_sb->s_dirt = 1;
btrfs_update_inode_block_group(trans, dir);
- btrfs_update_inode(trans, root, inode);
+ err = btrfs_update_inode(trans, root, inode);
+ if (err)
+ drop_inode = 1;
btrfs_end_transaction(trans, root);
mutex_unlock(&root->fs_info->fs_mutex);
@@ -1349,17 +1369,26 @@
ret = btrfs_alloc_extent(trans, root, inode->i_ino,
1, alloc_hint, (u64)-1,
&ins, 1);
- BUG_ON(ret);
+ if (ret) {
+ err = ret;
+ goto out;
+ }
ret = btrfs_insert_file_extent(trans, root, inode->i_ino,
iblock << inode->i_blkbits,
ins.objectid, ins.offset,
ins.offset);
- BUG_ON(ret);
+ if (ret) {
+ err = ret;
+ goto out;
+ }
btrfs_map_bh_to_logical(root, result, ins.objectid);
}
out:
- if (trans)
- err = btrfs_end_transaction(trans, root);
+ if (trans) {
+ ret = btrfs_end_transaction(trans, root);
+ if (!err)
+ err = ret;
+ }
btrfs_free_path(path);
return err;
}
@@ -1375,8 +1404,8 @@
return err;
}
-int btrfs_get_block_csum(struct inode *inode, sector_t iblock,
- struct buffer_head *result, int create)
+static int btrfs_get_block_csum(struct inode *inode, sector_t iblock,
+ struct buffer_head *result, int create)
{
int ret;
struct btrfs_root *root = BTRFS_I(inode)->root;
@@ -1397,7 +1426,7 @@
/* a csum that isn't present is a preallocated region. */
if (ret == -ENOENT || ret == -EFBIG)
ret = 0;
- result->b_private = 0;
+ result->b_private = NULL;
goto out;
}
memcpy((char *)&result->b_private, &item->csum, BTRFS_CRC32_SIZE);
@@ -1736,11 +1765,10 @@
trans = btrfs_start_transaction(root, 1);
btrfs_set_trans_block_group(trans, inode);
kaddr = kmap(page);
- ret = btrfs_csum_file_block(trans, root, inode->i_ino,
+ btrfs_csum_file_block(trans, root, inode->i_ino,
off, kaddr + bh_offset(bh),
bh->b_size);
kunmap(page);
- BUG_ON(ret);
ret = btrfs_end_transaction(trans, root);
BUG_ON(ret);
mutex_unlock(&root->fs_info->fs_mutex);
@@ -1930,7 +1958,6 @@
/* FIXME, add redo link to tree so we don't leak on crash */
ret = btrfs_truncate_in_trans(trans, root, inode);
- BUG_ON(ret);
btrfs_update_inode(trans, root, inode);
ret = btrfs_end_transaction(trans, root);
BUG_ON(ret);
@@ -1970,6 +1997,7 @@
struct inode *inode;
struct inode *dir;
int ret;
+ int err;
u64 objectid;
u64 new_dirid = BTRFS_FIRST_FREE_OBJECTID;
@@ -1978,8 +2006,8 @@
BUG_ON(!trans);
subvol = btrfs_alloc_free_block(trans, root, 0);
- if (subvol == NULL)
- return -ENOSPC;
+ if (IS_ERR(subvol))
+ return PTR_ERR(subvol);
leaf = btrfs_buffer_leaf(subvol);
btrfs_set_header_nritems(&leaf->header, 0);
btrfs_set_header_level(&leaf->header, 0);
@@ -2005,7 +2033,8 @@
ret = btrfs_find_free_objectid(trans, root->fs_info->tree_root,
0, &objectid);
- BUG_ON(ret);
+ if (ret)
+ goto fail;
btrfs_set_root_dirid(&root_item, new_dirid);
@@ -2015,7 +2044,8 @@
btrfs_set_key_type(&key, BTRFS_ROOT_ITEM_KEY);
ret = btrfs_insert_root(trans, root->fs_info->tree_root, &key,
&root_item);
- BUG_ON(ret);
+ if (ret)
+ goto fail;
/*
* insert the directory item
@@ -2025,10 +2055,12 @@
ret = btrfs_insert_dir_item(trans, root->fs_info->tree_root,
name, namelen, dir->i_ino, &key,
BTRFS_FT_DIR);
- BUG_ON(ret);
+ if (ret)
+ goto fail;
ret = btrfs_commit_transaction(trans, root);
- BUG_ON(ret);
+ if (ret)
+ goto fail_commit;
new_root = btrfs_read_fs_root(root->fs_info, &key);
BUG_ON(!new_root);
@@ -2038,24 +2070,29 @@
inode = btrfs_new_inode(trans, new_root, new_dirid,
BTRFS_I(dir)->block_group, S_IFDIR | 0700);
+ if (IS_ERR(inode))
+ goto fail;
inode->i_op = &btrfs_dir_inode_operations;
inode->i_fop = &btrfs_dir_file_operations;
new_root->inode = inode;
ret = btrfs_make_empty_dir(trans, new_root, new_dirid, new_dirid);
- BUG_ON(ret);
+ if (ret)
+ goto fail;
inode->i_nlink = 1;
inode->i_size = 6;
ret = btrfs_update_inode(trans, new_root, inode);
- BUG_ON(ret);
-
- ret = btrfs_commit_transaction(trans, new_root);
- BUG_ON(ret);
-
+ if (ret)
+ goto fail;
+fail:
+ err = btrfs_commit_transaction(trans, root);
+ if (err && !ret)
+ ret = err;
+fail_commit:
mutex_unlock(&root->fs_info->fs_mutex);
btrfs_btree_balance_dirty(root);
- return 0;
+ return ret;
}
static int create_snapshot(struct btrfs_root *root, char *name, int namelen)
@@ -2064,6 +2101,7 @@
struct btrfs_key key;
struct btrfs_root_item new_root_item;
int ret;
+ int err;
u64 objectid;
if (!root->ref_cows)
@@ -2074,11 +2112,13 @@
BUG_ON(!trans);
ret = btrfs_update_inode(trans, root, root->inode);
- BUG_ON(ret);
+ if (ret)
+ goto fail;
ret = btrfs_find_free_objectid(trans, root->fs_info->tree_root,
0, &objectid);
- BUG_ON(ret);
+ if (ret)
+ goto fail;
memcpy(&new_root_item, &root->root_item,
sizeof(new_root_item));
@@ -2091,7 +2131,8 @@
ret = btrfs_insert_root(trans, root->fs_info->tree_root, &key,
&new_root_item);
- BUG_ON(ret);
+ if (ret)
+ goto fail;
/*
* insert the directory item
@@ -2102,16 +2143,20 @@
root->fs_info->sb->s_root->d_inode->i_ino,
&key, BTRFS_FT_DIR);
- BUG_ON(ret);
+ if (ret)
+ goto fail;
ret = btrfs_inc_root_ref(trans, root);
- BUG_ON(ret);
+ if (ret)
+ goto fail;
- ret = btrfs_commit_transaction(trans, root);
- BUG_ON(ret);
+fail:
+ err = btrfs_commit_transaction(trans, root);
+ if (err && !ret)
+ ret = err;
mutex_unlock(&root->fs_info->fs_mutex);
btrfs_btree_balance_dirty(root);
- return 0;
+ return ret;
}
int btrfs_ioctl(struct inode *inode, struct file *filp, unsigned int
@@ -2148,12 +2193,13 @@
btrfs_free_path(path);
if (di && !IS_ERR(di))
return -EEXIST;
+ if (IS_ERR(di))
+ return PTR_ERR(di);
if (root == root->fs_info->tree_root)
ret = create_subvol(root, vol_args.name, namelen);
else
ret = create_snapshot(root, vol_args.name, namelen);
- WARN_ON(ret);
break;
default:
return -ENOTTY;
@@ -2316,7 +2362,6 @@
old_parent_oid = btrfs_disk_key_objectid(&di->location);
ret = btrfs_del_item(trans, root, path);
if (ret) {
- ret = -EIO;
goto out_fail;
}
btrfs_release_path(root, path);
@@ -2335,7 +2380,6 @@
}
ret = btrfs_del_item(trans, root, path);
if (ret) {
- ret = -EIO;
goto out_fail;
}
btrfs_release_path(root, path);
@@ -2361,7 +2405,9 @@
clear_nlink(new_inode);
else
drop_nlink(new_inode);
- btrfs_update_inode(trans, root, new_inode);
+ ret = btrfs_update_inode(trans, root, new_inode);
+ if (ret)
+ goto out_fail;
}
ret = btrfs_add_link(trans, new_dentry, old_inode);
if (ret)
@@ -2433,7 +2479,10 @@
datasize = btrfs_file_extent_calc_inline_size(name_len);
err = btrfs_insert_empty_item(trans, root, path, &key,
datasize);
- BUG_ON(err);
+ if (err) {
+ drop_inode = 1;
+ goto out_unlock;
+ }
ei = btrfs_item_ptr(btrfs_buffer_leaf(path->nodes[0]),
path->slots[0], struct btrfs_file_extent_item);
btrfs_set_file_extent_generation(ei, trans->transid);
@@ -2447,13 +2496,13 @@
inode->i_op = &btrfs_symlink_inode_operations;
inode->i_mapping->a_ops = &btrfs_symlink_aops;
inode->i_size = name_len - 1;
- btrfs_update_inode(trans, root, inode);
- err = 0;
+ err = btrfs_update_inode(trans, root, inode);
+ if (err)
+ drop_inode = 1;
out_unlock:
btrfs_end_transaction(trans, root);
mutex_unlock(&root->fs_info->fs_mutex);
-
if (drop_inode) {
inode_dec_link_count(inode);
iput(inode);
diff --git a/fs/btrfs/root-tree.c b/fs/btrfs/root-tree.c
index 8e1b904..ac0fae7 100644
--- a/fs/btrfs/root-tree.c
+++ b/fs/btrfs/root-tree.c
@@ -90,7 +90,6 @@
{
int ret;
ret = btrfs_insert_item(trans, root, key, item, sizeof(*item));
- BUG_ON(ret);
return ret;
}
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index ef8ad18..c11ecf5 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -125,9 +125,8 @@
trans = btrfs_start_transaction(root, 1);
ret = btrfs_commit_transaction(trans, root);
sb->s_dirt = 0;
- BUG_ON(ret);
mutex_unlock(&root->fs_info->fs_mutex);
- return 0;
+ return ret;
}
static void btrfs_write_super(struct super_block *sb)
diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
index b5b99a8..321f885 100644
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -219,7 +219,8 @@
struct btrfs_root *root;
int i;
int ret;
- int err;
+ int err = 0;
+
while(1) {
ret = radix_tree_gang_lookup_tag(radix, (void **)gang, 0,
ARRAY_SIZE(gang),
@@ -251,11 +252,12 @@
err = btrfs_insert_root(trans, root->fs_info->tree_root,
&root->root_key,
&root->root_item);
- BUG_ON(err);
+ if (err)
+ break;
list_add(&dirty->list, list);
}
}
- return 0;
+ return err;
}
static int drop_dirty_roots(struct btrfs_root *tree_root,
@@ -263,7 +265,7 @@
{
struct dirty_root *dirty;
struct btrfs_trans_handle *trans;
- int ret;
+ int ret = 0;
while(!list_empty(list)) {
mutex_lock(&tree_root->fs_info->fs_mutex);
dirty = list_entry(list->next, struct dirty_root, list);
@@ -274,14 +276,15 @@
BUG_ON(ret);
ret = btrfs_del_root(trans, tree_root, &dirty->snap_key);
- BUG_ON(ret);
+ if (ret)
+ break;
ret = btrfs_end_transaction(trans, tree_root);
BUG_ON(ret);
kfree(dirty);
mutex_unlock(&tree_root->fs_info->fs_mutex);
btrfs_btree_balance_dirty(tree_root);
}
- return 0;
+ return ret;
}
int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
@@ -321,9 +324,13 @@
}
finish_wait(&trans->transaction->writer_wait, &wait);
WARN_ON(cur_trans != trans->transaction);
- add_dirty_roots(trans, &root->fs_info->fs_roots_radix, &dirty_fs_roots);
+ ret = add_dirty_roots(trans, &root->fs_info->fs_roots_radix,
+ &dirty_fs_roots);
+ BUG_ON(ret);
+
ret = btrfs_commit_tree_roots(trans, root);
BUG_ON(ret);
+
cur_trans = root->fs_info->running_transaction;
root->fs_info->running_transaction = NULL;
if (cur_trans->list.prev != &root->fs_info->trans_list) {
