kfree(fs_devices);
}
-int btrfs_cleanup_fs_uuids(void)
+void btrfs_cleanup_fs_uuids(void)
{
struct btrfs_fs_devices *fs_devices;
list_del(&fs_devices->list);
free_fs_devices(fs_devices);
}
- return 0;
}
static noinline struct btrfs_device *__find_device(struct list_head *head,
* the list if the block device is congested. This way, multiple devices
* can make progress from a single worker thread.
*/
-static noinline int run_scheduled_bios(struct btrfs_device *device)
+static noinline void run_scheduled_bios(struct btrfs_device *device)
{
struct bio *pending;
struct backing_dev_info *bdi;
done:
blk_finish_plug(&plug);
- return 0;
}
static void pending_bios_fn(struct btrfs_work *work)
return ERR_PTR(-ENOMEM);
}
-int btrfs_close_extra_devices(struct btrfs_fs_devices *fs_devices)
+void btrfs_close_extra_devices(struct btrfs_fs_devices *fs_devices)
{
struct btrfs_device *device, *next;
+ struct block_device *latest_bdev = NULL;
+ u64 latest_devid = 0;
+ u64 latest_transid = 0;
+
mutex_lock(&uuid_mutex);
again:
/* This is the initialized path, it is safe to release the devices. */
list_for_each_entry_safe(device, next, &fs_devices->devices, dev_list) {
- if (device->in_fs_metadata)
+ if (device->in_fs_metadata) {
+ if (!latest_transid ||
+ device->generation > latest_transid) {
+ latest_devid = device->devid;
+ latest_transid = device->generation;
+ latest_bdev = device->bdev;
+ }
continue;
+ }
if (device->bdev) {
blkdev_put(device->bdev, device->mode);
goto again;
}
+ fs_devices->latest_bdev = latest_bdev;
+ fs_devices->latest_devid = latest_devid;
+ fs_devices->latest_trans = latest_transid;
+
mutex_unlock(&uuid_mutex);
- return 0;
}
static void __free_device(struct work_struct *work)
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;
key.type = BTRFS_DEV_EXTENT_KEY;
ret = btrfs_insert_empty_item(trans, root, path, &key,
sizeof(*extent));
- BUG_ON(ret);
+ if (ret)
+ goto out;
leaf = path->nodes[0];
extent = btrfs_item_ptr(leaf, path->slots[0],
btrfs_set_dev_extent_length(leaf, extent, num_bytes);
btrfs_mark_buffer_dirty(leaf);
+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;
}
em = lookup_extent_mapping(em_tree, chunk_offset, 1);
read_unlock(&em_tree->lock);
- BUG_ON(em->start > chunk_offset ||
+ BUG_ON(!em || em->start > chunk_offset ||
em->start + em->len < chunk_offset);
map = (struct map_lookup *)em->bdev;
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);
write_lock(&em_tree->lock);
ret = add_extent_mapping(em_tree, em);
write_unlock(&em_tree->lock);
- BUG_ON(ret);
free_extent_map(em);
+ if (ret)
+ goto error;
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);
device = map->stripes[index].dev;
device->bytes_used += stripe_size;
ret = btrfs_update_device(trans, device);
- BUG_ON(ret);
+ if (ret)
+ goto out_free;
index++;
}
key.offset = chunk_offset;
ret = btrfs_insert_item(trans, chunk_root, &key, chunk, item_size);
- BUG_ON(ret);
- if (map->type & BTRFS_BLOCK_GROUP_SYSTEM) {
+ if (ret == 0 && map->type & BTRFS_BLOCK_GROUP_SYSTEM) {
+ /*
+ * TODO: Cleanup of inserted chunk root in case of
+ * failure.
+ */
ret = btrfs_add_system_chunk(chunk_root, &key, chunk,
item_size);
- BUG_ON(ret);
}
+out_free:
kfree(chunk);
- return 0;
+ return ret;
}
/*
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)
* This will add one bio to the pending list for a device and make sure
* the work struct is scheduled.
*/
-static noinline int schedule_bio(struct btrfs_root *root,
+static noinline void schedule_bio(struct btrfs_root *root,
struct btrfs_device *device,
int rw, struct bio *bio)
{
bio_get(bio);
btrfsic_submit_bio(rw, bio);
bio_put(bio);
- return 0;
+ return;
}
/*
if (should_queue)
btrfs_queue_worker(&root->fs_info->submit_workers,
&device->work);
- return 0;
}
int btrfs_map_bio(struct btrfs_root *root, int rw, struct bio *bio,
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;
}
-static int fill_device_from_item(struct extent_buffer *leaf,
+static void fill_device_from_item(struct extent_buffer *leaf,
struct btrfs_dev_item *dev_item,
struct btrfs_device *device)
{
ptr = (unsigned long)btrfs_device_uuid(dev_item);
read_extent_buffer(leaf, device->uuid, ptr, BTRFS_UUID_SIZE);
-
- return 0;
}
static int open_seed_devices(struct btrfs_root *root, u8 *fsid)
return -ENOMEM;
btrfs_set_buffer_uptodate(sb);
btrfs_set_buffer_lockdep_class(root->root_key.objectid, sb, 0);
+ /*
+ * The sb extent buffer is artifical and just used to read the system array.
+ * btrfs_set_buffer_uptodate() call does not properly mark all it's
+ * pages up-to-date when the page is larger: extent does not cover the
+ * whole page and consequently check_page_uptodate does not find all
+ * the page's extents up-to-date (the hole beyond sb),
+ * write_extent_buffer then triggers a WARN_ON.
+ *
+ * Regular short extents go through mark_extent_buffer_dirty/writeback cycle,
+ * but sb spans only this function. Add an explicit SetPageUptodate call
+ * to silence the warning eg. on PowerPC 64.
+ */
+ if (PAGE_CACHE_SIZE > BTRFS_SUPER_INFO_SIZE)
+ SetPageUptodate(sb->first_page);
write_extent_buffer(sb, super_copy, 0, BTRFS_SUPER_INFO_SIZE);
array_size = btrfs_super_sys_array_size(super_copy);
projects / linux-2.6-block.git / blobdiff