@@ -589,7 +589,8 @@ static noinline int replay_one_extent(struct btrfs_trans_handle *trans,
/* drop any overlapping extents */
ret = btrfs_drop_extents(trans, root, inode, start, extent_end, 1);
- BUG_ON(ret);
+ if (ret)
+ goto out;
if (found_type == BTRFS_FILE_EXTENT_REG ||
found_type == BTRFS_FILE_EXTENT_PREALLOC) {
@@ -599,7 +600,8 @@ static noinline int replay_one_extent(struct btrfs_trans_handle *trans,
ret = btrfs_insert_empty_item(trans, root, path, key,
sizeof(*item));
- BUG_ON(ret);
+ if (ret)
+ goto out;
dest_offset = btrfs_item_ptr_offset(path->nodes[0],
path->slots[0]);
copy_extent_buffer(path->nodes[0], eb, dest_offset,
@@ -653,26 +655,30 @@ static noinline int replay_one_extent(struct btrfs_trans_handle *trans,
ret = btrfs_lookup_csums_range(root->log_root,
csum_start, csum_end - 1,
&ordered_sums, 0);
- BUG_ON(ret);
+ if (ret)
+ goto out;
while (!list_empty(&ordered_sums)) {
struct btrfs_ordered_sum *sums;
sums = list_entry(ordered_sums.next,
struct btrfs_ordered_sum,
list);
- ret = btrfs_csum_file_blocks(trans,
+ if (!ret)
+ ret = btrfs_csum_file_blocks(trans,
root->fs_info->csum_root,
sums);
- BUG_ON(ret);
list_del(&sums->list);
kfree(sums);
}
+ if (ret)
+ goto out;
} else {
btrfs_release_path(path);
}
} else if (found_type == BTRFS_FILE_EXTENT_INLINE) {
/* inline extents are easy, we just overwrite them */
ret = overwrite_item(trans, root, path, eb, slot, key);
- BUG_ON(ret);
+ if (ret)
+ goto out;
}
inode_add_bytes(inode, nbytes);
@@ -717,20 +723,21 @@ static noinline int drop_one_dir_item(struct btrfs_trans_handle *trans,
inode = read_one_inode(root, location.objectid);
if (!inode) {
- kfree(name);
- return -EIO;
+ ret = -EIO;
+ goto out;
}
ret = link_to_fixup_dir(trans, root, path, location.objectid);
- BUG_ON(ret);
+ if (ret)
+ goto out;
ret = btrfs_unlink_inode(trans, root, dir, inode, name, name_len);
- BUG_ON(ret);
+ if (ret)
+ goto out;
+ btrfs_run_delayed_items(trans, root);
+out:
kfree(name);
-
iput(inode);
-
- btrfs_run_delayed_items(trans, root);
return ret;
}
@@ -883,7 +890,8 @@ again:
victim_name_len = btrfs_inode_ref_name_len(leaf,
victim_ref);
victim_name = kmalloc(victim_name_len, GFP_NOFS);
- BUG_ON(!victim_name);
+ if (!victim_name)
+ return -ENOMEM;
read_extent_buffer(leaf, victim_name,
(unsigned long)(victim_ref + 1),
@@ -899,9 +907,10 @@ again:
ret = btrfs_unlink_inode(trans, root, dir,
inode, victim_name,
victim_name_len);
- BUG_ON(ret);
- btrfs_run_delayed_items(trans, root);
kfree(victim_name);
+ if (ret)
+ return ret;
+ btrfs_run_delayed_items(trans, root);
*search_done = 1;
goto again;
}
@@ -909,7 +918,6 @@ again:
ptr = (unsigned long)(victim_ref + 1) + victim_name_len;
}
- BUG_ON(ret);
/*
* NOTE: we have searched root tree and checked the
@@ -943,6 +951,8 @@ again:
goto next;
victim_name = kmalloc(victim_name_len, GFP_NOFS);
+ if (!victim_name)
+ return -ENOMEM;
read_extent_buffer(leaf, victim_name, (unsigned long)&extref->name,
victim_name_len);
@@ -969,14 +979,16 @@ again:
victim_name_len);
btrfs_run_delayed_items(trans, root);
}
- BUG_ON(ret);
iput(victim_parent);
kfree(victim_name);
+ if (ret)
+ return ret;
*search_done = 1;
goto again;
}
kfree(victim_name);
- BUG_ON(ret);
+ if (ret)
+ return ret;
next:
cur_offset += victim_name_len + sizeof(*extref);
}
@@ -989,7 +1001,8 @@ next:
ref_index, name, namelen, 0);
if (di && !IS_ERR(di)) {
ret = drop_one_dir_item(trans, root, path, dir, di);
- BUG_ON(ret);
+ if (ret)
+ return ret;
}
btrfs_release_path(path);
@@ -998,7 +1011,8 @@ next:
name, namelen, 0);
if (di && !IS_ERR(di)) {
ret = drop_one_dir_item(trans, root, path, dir, di);
- BUG_ON(ret);
+ if (ret)
+ return ret;
}
btrfs_release_path(path);
@@ -1143,15 +1157,19 @@ static noinline int add_inode_ref(struct btrfs_trans_handle *trans,
parent_objectid,
ref_index, name, namelen,
&search_done);
- if (ret == 1)
+ if (ret == 1) {
+ ret = 0;
+ goto out;
+ }
+ if (ret)
goto out;
- BUG_ON(ret);
}
/* insert our name */
ret = btrfs_add_link(trans, dir, inode, name, namelen,
0, ref_index);
- BUG_ON(ret);
+ if (ret)
+ goto out;
btrfs_update_inode(trans, root, inode);
}
@@ -1166,13 +1184,11 @@ static noinline int add_inode_ref(struct btrfs_trans_handle *trans,
/* finally write the back reference in the inode */
ret = overwrite_item(trans, root, path, eb, slot, key);
- BUG_ON(ret);
-
out:
btrfs_release_path(path);
iput(dir);
iput(inode);
- return 0;
+ return ret;
}
static int insert_orphan_item(struct btrfs_trans_handle *trans,
@@ -1330,10 +1346,10 @@ static noinline int fixup_inode_link_count(struct btrfs_trans_handle *trans,
if (S_ISDIR(inode->i_mode)) {
ret = replay_dir_deletes(trans, root, NULL, path,
ino, 1);
- BUG_ON(ret);
+ if (ret)
+ goto out;
}
ret = insert_orphan_item(trans, root, ino);
- BUG_ON(ret);
}
out:
@@ -1378,9 +1394,9 @@ static noinline int fixup_inode_link_counts(struct btrfs_trans_handle *trans,
return -EIO;
ret = fixup_inode_link_count(trans, root, inode);
- BUG_ON(ret);
-
iput(inode);
+ if (ret)
+ goto out;
/*
* fixup on a directory may create new entries,
@@ -1430,7 +1446,7 @@ static noinline int link_to_fixup_dir(struct btrfs_trans_handle *trans,
} else if (ret == -EEXIST) {
ret = 0;
} else {
- BUG();
+ BUG(); /* Logic Error */
}
iput(inode);
@@ -1499,7 +1515,7 @@ static noinline int replay_one_name(struct btrfs_trans_handle *trans,
struct inode *dir;
u8 log_type;
int exists;
- int ret;
+ int ret = 0;
dir = read_one_inode(root, key->objectid);
if (!dir)
@@ -1531,7 +1547,9 @@ static noinline int replay_one_name(struct btrfs_trans_handle *trans,
key->offset, name,
name_len, 1);
} else {
- BUG();
+ /* Corruption */
+ ret = -EINVAL;
+ goto out;
}
if (IS_ERR_OR_NULL(dst_di)) {
/* we need a sequence number to insert, so we only
@@ -1559,7 +1577,8 @@ static noinline int replay_one_name(struct btrfs_trans_handle *trans,
goto out;
ret = drop_one_dir_item(trans, root, path, dir, dst_di);
- BUG_ON(ret);
+ if (ret)
+ goto out;
if (key->type == BTRFS_DIR_INDEX_KEY)
goto insert;
@@ -1567,14 +1586,15 @@ out:
btrfs_release_path(path);
kfree(name);
iput(dir);
- return 0;
+ return ret;
insert:
btrfs_release_path(path);
ret = insert_one_name(trans, root, path, key->objectid, key->offset,
name, name_len, log_type, &log_key);
-
- BUG_ON(ret && ret != -ENOENT);
+ if (ret && ret != -ENOENT)
+ goto out;
+ ret = 0;
goto out;
}
@@ -1605,7 +1625,8 @@ static noinline int replay_one_dir_item(struct btrfs_trans_handle *trans,
return -EIO;
name_len = btrfs_dir_name_len(eb, di);
ret = replay_one_name(trans, root, path, eb, di, key);
- BUG_ON(ret);
+ if (ret)
+ return ret;
ptr = (unsigned long)(di + 1);
ptr += name_len;
}
@@ -1766,16 +1787,21 @@ again:
ret = link_to_fixup_dir(trans, root,
path, location.objectid);
- BUG_ON(ret);
+ if (ret) {
+ kfree(name);
+ iput(inode);
+ goto out;
+ }
+
btrfs_inc_nlink(inode);
ret = btrfs_unlink_inode(trans, root, dir, inode,
name, name_len);
- BUG_ON(ret);
-
- btrfs_run_delayed_items(trans, root);
-
+ if (!ret)
+ btrfs_run_delayed_items(trans, root);
kfree(name);
iput(inode);
+ if (ret)
+ goto out;
/* there might still be more names under this key
* check and repeat if required
@@ -1879,7 +1905,8 @@ again:
ret = check_item_in_log(trans, root, log, path,
log_path, dir,
&found_key);
- BUG_ON(ret);
+ if (ret)
+ goto out;
if (found_key.offset == (u64)-1)
break;
dir_key.offset = found_key.offset + 1;
@@ -2083,7 +2110,10 @@ static noinline int walk_down_log_tree(struct btrfs_trans_handle *trans,
BTRFS_TREE_LOG_OBJECTID);
ret = btrfs_free_and_pin_reserved_extent(root,
bytenr, blocksize);
- BUG_ON(ret); /* -ENOMEM or logic errors */
+ if (ret) {
+ free_extent_buffer(next);
+ return ret;
+ }
}
free_extent_buffer(next);
continue;
@@ -2156,7 +2186,8 @@ static noinline int walk_up_log_tree(struct btrfs_trans_handle *trans,
ret = btrfs_free_and_pin_reserved_extent(root,
path->nodes[*level]->start,
path->nodes[*level]->len);
- BUG_ON(ret);
+ if (ret)
+ return ret;
}
free_extent_buffer(path->nodes[*level]);
path->nodes[*level] = NULL;
@@ -2229,7 +2260,8 @@ static int walk_log_tree(struct btrfs_trans_handle *trans,
BTRFS_TREE_LOG_OBJECTID);
ret = btrfs_free_and_pin_reserved_extent(log, next->start,
next->len);
- BUG_ON(ret); /* -ENOMEM or logic errors */
+ if (ret)
+ goto out;
}
}
@@ -2517,7 +2549,10 @@ static void free_log_tree(struct btrfs_trans_handle *trans,
if (trans) {
ret = walk_log_tree(trans, log, &wc);
- BUG_ON(ret);
+
+ /* I don't think this can happen but just in case */
+ if (ret)
+ btrfs_abort_transaction(trans, log, ret);
}
while (1) {
@@ -2625,7 +2660,10 @@ int btrfs_del_dir_entries_in_log(struct btrfs_trans_handle *trans,
if (di) {
ret = btrfs_delete_one_dir_name(trans, log, path, di);
bytes_del += name_len;
- BUG_ON(ret);
+ if (ret) {
+ err = ret;
+ goto fail;
+ }
}
btrfs_release_path(path);
di = btrfs_lookup_dir_index_item(trans, log, path, dir_ino,
@@ -2637,7 +2675,10 @@ int btrfs_del_dir_entries_in_log(struct btrfs_trans_handle *trans,
if (di) {
ret = btrfs_delete_one_dir_name(trans, log, path, di);
bytes_del += name_len;
- BUG_ON(ret);
+ if (ret) {
+ err = ret;
+ goto fail;
+ }
}
/* update the directory size in the log to reflect the names
@@ -2976,7 +3017,7 @@ static int drop_objectid_items(struct btrfs_trans_handle *trans,
while (1) {
ret = btrfs_search_slot(trans, log, &key, path, -1, 1);
- BUG_ON(ret == 0);
+ BUG_ON(ret == 0); /* Logic error */
if (ret < 0)
break;
@@ -3179,7 +3220,11 @@ static noinline int copy_items(struct btrfs_trans_handle *trans,
log->fs_info->csum_root,
ds + cs, ds + cs + cl - 1,
&ordered_sums, 0);
- BUG_ON(ret);
+ if (ret) {
+ btrfs_release_path(dst_path);
+ kfree(ins_data);
+ return ret;
+ }
}
}
}
There were a whole bunch and I was doing it for other things. I haven't tested these error paths but at the very least this is better than panicing. I've only left 2 BUG_ON()'s since they are logic errors and I want to replace them with a ASSERT framework that we can compile out for production users. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com> --- fs/btrfs/tree-log.c | 151 +++++++++++++++++++++++++++++++++------------------ 1 files changed, 98 insertions(+), 53 deletions(-)