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Diffstat (limited to 'fs/btrfs/volumes.c')
-rw-r--r--fs/btrfs/volumes.c138
1 files changed, 81 insertions, 57 deletions
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 0fb4a959012e..bb0addce7558 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -140,7 +140,6 @@ static int btrfs_relocate_sys_chunks(struct btrfs_root *root);
static void __btrfs_reset_dev_stats(struct btrfs_device *dev);
static void btrfs_dev_stat_print_on_error(struct btrfs_device *dev);
static void btrfs_dev_stat_print_on_load(struct btrfs_device *device);
-static void btrfs_close_one_device(struct btrfs_device *device);
DEFINE_MUTEX(uuid_mutex);
static LIST_HEAD(fs_uuids);
@@ -853,6 +852,46 @@ static void free_device(struct rcu_head *head)
schedule_work(&device->rcu_work);
}
+static void btrfs_close_one_device(struct btrfs_device *device)
+{
+ struct btrfs_fs_devices *fs_devices = device->fs_devices;
+ struct btrfs_device *new_device;
+ struct rcu_string *name;
+
+ if (device->bdev)
+ fs_devices->open_devices--;
+
+ if (device->writeable &&
+ device->devid != BTRFS_DEV_REPLACE_DEVID) {
+ list_del_init(&device->dev_alloc_list);
+ fs_devices->rw_devices--;
+ }
+
+ if (device->missing)
+ fs_devices->missing_devices--;
+
+ if (device->bdev && device->writeable) {
+ sync_blockdev(device->bdev);
+ invalidate_bdev(device->bdev);
+ }
+
+ new_device = btrfs_alloc_device(NULL, &device->devid,
+ device->uuid);
+ BUG_ON(IS_ERR(new_device)); /* -ENOMEM */
+
+ /* Safe because we are under uuid_mutex */
+ if (device->name) {
+ name = rcu_string_strdup(device->name->str, GFP_NOFS);
+ BUG_ON(!name); /* -ENOMEM */
+ rcu_assign_pointer(new_device->name, name);
+ }
+
+ list_replace_rcu(&device->dev_list, &new_device->dev_list);
+ new_device->fs_devices = device->fs_devices;
+
+ call_rcu(&device->rcu, free_device);
+}
+
static int __btrfs_close_devices(struct btrfs_fs_devices *fs_devices)
{
struct btrfs_device *device, *tmp;
@@ -2399,14 +2438,14 @@ int btrfs_init_new_device(struct btrfs_root *root, char *device_path)
ret = init_first_rw_device(trans, root, device);
unlock_chunks(root);
if (ret) {
- btrfs_abort_transaction(trans, root, ret);
+ btrfs_abort_transaction(trans, ret);
goto error_trans;
}
}
ret = btrfs_add_device(trans, root, device);
if (ret) {
- btrfs_abort_transaction(trans, root, ret);
+ btrfs_abort_transaction(trans, ret);
goto error_trans;
}
@@ -2415,7 +2454,7 @@ int btrfs_init_new_device(struct btrfs_root *root, char *device_path)
ret = btrfs_finish_sprout(trans, root);
if (ret) {
- btrfs_abort_transaction(trans, root, ret);
+ btrfs_abort_transaction(trans, ret);
goto error_trans;
}
@@ -2801,7 +2840,7 @@ int btrfs_remove_chunk(struct btrfs_trans_handle *trans,
&dev_extent_len);
if (ret) {
mutex_unlock(&fs_devices->device_list_mutex);
- btrfs_abort_transaction(trans, root, ret);
+ btrfs_abort_transaction(trans, ret);
goto out;
}
@@ -2820,7 +2859,7 @@ int btrfs_remove_chunk(struct btrfs_trans_handle *trans,
ret = btrfs_update_device(trans, map->stripes[i].dev);
if (ret) {
mutex_unlock(&fs_devices->device_list_mutex);
- btrfs_abort_transaction(trans, root, ret);
+ btrfs_abort_transaction(trans, ret);
goto out;
}
}
@@ -2829,7 +2868,7 @@ int btrfs_remove_chunk(struct btrfs_trans_handle *trans,
ret = btrfs_free_chunk(trans, root, chunk_objectid, chunk_offset);
if (ret) {
- btrfs_abort_transaction(trans, root, ret);
+ btrfs_abort_transaction(trans, ret);
goto out;
}
@@ -2838,14 +2877,14 @@ int btrfs_remove_chunk(struct btrfs_trans_handle *trans,
if (map->type & BTRFS_BLOCK_GROUP_SYSTEM) {
ret = btrfs_del_sys_chunk(root, chunk_objectid, chunk_offset);
if (ret) {
- btrfs_abort_transaction(trans, root, ret);
+ btrfs_abort_transaction(trans, ret);
goto out;
}
}
ret = btrfs_remove_block_group(trans, extent_root, chunk_offset, em);
if (ret) {
- btrfs_abort_transaction(trans, extent_root, ret);
+ btrfs_abort_transaction(trans, ret);
goto out;
}
@@ -2902,7 +2941,7 @@ static int btrfs_relocate_chunk(struct btrfs_root *root, u64 chunk_offset)
* chunk tree entries
*/
ret = btrfs_remove_chunk(trans, root, chunk_offset);
- btrfs_end_transaction(trans, root);
+ btrfs_end_transaction(trans, extent_root);
return ret;
}
@@ -3421,7 +3460,7 @@ static int __btrfs_balance(struct btrfs_fs_info *fs_info)
u64 size_to_free;
u64 chunk_type;
struct btrfs_chunk *chunk;
- struct btrfs_path *path;
+ struct btrfs_path *path = NULL;
struct btrfs_key key;
struct btrfs_key found_key;
struct btrfs_trans_handle *trans;
@@ -3455,13 +3494,33 @@ static int __btrfs_balance(struct btrfs_fs_info *fs_info)
ret = btrfs_shrink_device(device, old_size - size_to_free);
if (ret == -ENOSPC)
break;
- BUG_ON(ret);
+ if (ret) {
+ /* btrfs_shrink_device never returns ret > 0 */
+ WARN_ON(ret > 0);
+ goto error;
+ }
trans = btrfs_start_transaction(dev_root, 0);
- BUG_ON(IS_ERR(trans));
+ if (IS_ERR(trans)) {
+ ret = PTR_ERR(trans);
+ btrfs_info_in_rcu(fs_info,
+ "resize: unable to start transaction after shrinking device %s (error %d), old size %llu, new size %llu",
+ rcu_str_deref(device->name), ret,
+ old_size, old_size - size_to_free);
+ goto error;
+ }
ret = btrfs_grow_device(trans, device, old_size);
- BUG_ON(ret);
+ if (ret) {
+ btrfs_end_transaction(trans, dev_root);
+ /* btrfs_grow_device never returns ret > 0 */
+ WARN_ON(ret > 0);
+ btrfs_info_in_rcu(fs_info,
+ "resize: unable to grow device after shrinking device %s (error %d), old size %llu, new size %llu",
+ rcu_str_deref(device->name), ret,
+ old_size, old_size - size_to_free);
+ goto error;
+ }
btrfs_end_transaction(trans, dev_root);
}
@@ -3885,7 +3944,7 @@ int btrfs_resume_balance_async(struct btrfs_fs_info *fs_info)
}
spin_unlock(&fs_info->balance_lock);
- if (btrfs_test_opt(fs_info->tree_root, SKIP_BALANCE)) {
+ if (btrfs_test_opt(fs_info, SKIP_BALANCE)) {
btrfs_info(fs_info, "force skipping balance");
return 0;
}
@@ -4240,7 +4299,7 @@ int btrfs_create_uuid_tree(struct btrfs_fs_info *fs_info)
BTRFS_UUID_TREE_OBJECTID);
if (IS_ERR(uuid_root)) {
ret = PTR_ERR(uuid_root);
- btrfs_abort_transaction(trans, tree_root, ret);
+ btrfs_abort_transaction(trans, ret);
btrfs_end_transaction(trans, tree_root);
return ret;
}
@@ -4514,8 +4573,7 @@ static void check_raid56_incompat_flag(struct btrfs_fs_info *info, u64 type)
btrfs_set_fs_incompat(info, RAID56);
}
-#define BTRFS_MAX_DEVS(r) ((BTRFS_LEAF_DATA_SIZE(r) \
- - sizeof(struct btrfs_item) \
+#define BTRFS_MAX_DEVS(r) ((BTRFS_MAX_ITEM_SIZE(r) \
- sizeof(struct btrfs_chunk)) \
/ sizeof(struct btrfs_stripe) + 1)
@@ -6401,7 +6459,8 @@ static int read_one_chunk(struct btrfs_root *root, struct btrfs_key *key,
BTRFS_UUID_SIZE);
map->stripes[i].dev = btrfs_find_device(root->fs_info, devid,
uuid, NULL);
- if (!map->stripes[i].dev && !btrfs_test_opt(root, DEGRADED)) {
+ if (!map->stripes[i].dev &&
+ !btrfs_test_opt(root->fs_info, DEGRADED)) {
free_extent_map(em);
return -EIO;
}
@@ -6469,7 +6528,7 @@ static struct btrfs_fs_devices *open_seed_devices(struct btrfs_root *root,
fs_devices = find_fsid(fsid);
if (!fs_devices) {
- if (!btrfs_test_opt(root, DEGRADED))
+ if (!btrfs_test_opt(root->fs_info, DEGRADED))
return ERR_PTR(-ENOENT);
fs_devices = alloc_fs_devices(fsid);
@@ -6531,7 +6590,7 @@ static int read_one_dev(struct btrfs_root *root,
device = btrfs_find_device(root->fs_info, devid, dev_uuid, fs_uuid);
if (!device) {
- if (!btrfs_test_opt(root, DEGRADED))
+ if (!btrfs_test_opt(root->fs_info, DEGRADED))
return -EIO;
device = add_missing_dev(root, fs_devices, devid, dev_uuid);
@@ -6540,7 +6599,7 @@ static int read_one_dev(struct btrfs_root *root,
btrfs_warn(root->fs_info, "devid %llu uuid %pU missing",
devid, dev_uuid);
} else {
- if (!device->bdev && !btrfs_test_opt(root, DEGRADED))
+ if (!device->bdev && !btrfs_test_opt(root->fs_info, DEGRADED))
return -EIO;
if(!device->bdev && !device->missing) {
@@ -7143,38 +7202,3 @@ void btrfs_reset_fs_info_ptr(struct btrfs_fs_info *fs_info)
fs_devices = fs_devices->seed;
}
}
-
-static void btrfs_close_one_device(struct btrfs_device *device)
-{
- struct btrfs_fs_devices *fs_devices = device->fs_devices;
- struct btrfs_device *new_device;
- struct rcu_string *name;
-
- if (device->bdev)
- fs_devices->open_devices--;
-
- if (device->writeable &&
- device->devid != BTRFS_DEV_REPLACE_DEVID) {
- list_del_init(&device->dev_alloc_list);
- fs_devices->rw_devices--;
- }
-
- if (device->missing)
- fs_devices->missing_devices--;
-
- new_device = btrfs_alloc_device(NULL, &device->devid,
- device->uuid);
- BUG_ON(IS_ERR(new_device)); /* -ENOMEM */
-
- /* Safe because we are under uuid_mutex */
- if (device->name) {
- name = rcu_string_strdup(device->name->str, GFP_NOFS);
- BUG_ON(!name); /* -ENOMEM */
- rcu_assign_pointer(new_device->name, name);
- }
-
- list_replace_rcu(&device->dev_list, &new_device->dev_list);
- new_device->fs_devices = device->fs_devices;
-
- call_rcu(&device->rcu, free_device);
-}