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Commit 34441361 authored by David Sterba's avatar David Sterba
Browse files

btrfs: opencode chunk locking, remove helpers 



The helpers are trivial and we don't use them consistently.

Signed-off-by: default avatarDavid Sterba <dsterba@suse.com>
parent 3a45bb20

fs/btrfs/disk-io.c

+2 −2
Original line number Diff line number Diff line
@@ -4003,7 +4003,7 @@ void close_ctree(struct btrfs_fs_info *fs_info) 
	__btrfs_free_block_rsv(root->orphan_block_rsv);

	root->orphan_block_rsv = NULL;



	lock_chunks(fs_info);

	mutex_lock(&fs_info->chunk_mutex);

	while (!list_empty(&fs_info->pinned_chunks)) {

		struct extent_map *em;
@@ -4012,7 +4012,7 @@ void close_ctree(struct btrfs_fs_info *fs_info) 
		list_del_init(&em->list);

		free_extent_map(em);

	}

	unlock_chunks(fs_info);

	mutex_unlock(&fs_info->chunk_mutex);

}



int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid,

fs/btrfs/extent-tree.c

+4 −4
Original line number Diff line number Diff line
@@ -9419,9 +9419,9 @@ int btrfs_inc_block_group_ro(struct btrfs_root *root, 
out:

	if (cache->flags & BTRFS_BLOCK_GROUP_SYSTEM) {

		alloc_flags = update_block_group_flags(fs_info, cache->flags);

		lock_chunks(fs_info);

		mutex_lock(&fs_info->chunk_mutex);

		check_system_chunk(trans, fs_info, alloc_flags);

		unlock_chunks(fs_info);

		mutex_unlock(&fs_info->chunk_mutex);

	}

	mutex_unlock(&fs_info->ro_block_group_mutex);
@@ -10458,7 +10458,7 @@ int btrfs_remove_block_group(struct btrfs_trans_handle *trans, 


	memcpy(&key, &block_group->key, sizeof(key));



	lock_chunks(fs_info);

	mutex_lock(&fs_info->chunk_mutex);

	if (!list_empty(&em->list)) {

		/* We're in the transaction->pending_chunks list. */

		free_extent_map(em);
@@ -10526,7 +10526,7 @@ int btrfs_remove_block_group(struct btrfs_trans_handle *trans, 
		free_extent_map(em);

	}



	unlock_chunks(fs_info);

	mutex_unlock(&fs_info->chunk_mutex);



	ret = remove_block_group_free_space(trans, fs_info, block_group);

	if (ret)

fs/btrfs/free-space-cache.c

+2 −2
Original line number Diff line number Diff line
@@ -3352,7 +3352,7 @@ void btrfs_put_block_group_trimming(struct btrfs_block_group_cache *block_group) 
	spin_unlock(&block_group->lock);



	if (cleanup) {

		lock_chunks(fs_info);

		mutex_lock(&fs_info->chunk_mutex);

		em_tree = &fs_info->mapping_tree.map_tree;

		write_lock(&em_tree->lock);

		em = lookup_extent_mapping(em_tree, block_group->key.objectid,
@@ -3364,7 +3364,7 @@ void btrfs_put_block_group_trimming(struct btrfs_block_group_cache *block_group) 
		 */

		remove_extent_mapping(em_tree, em);

		write_unlock(&em_tree->lock);

		unlock_chunks(fs_info);

		mutex_unlock(&fs_info->chunk_mutex);



		/* once for us and once for the tree */

		free_extent_map(em);

fs/btrfs/volumes.c

+35 −35
Original line number Diff line number Diff line
@@ -1890,10 +1890,10 @@ int btrfs_rm_device(struct btrfs_fs_info *fs_info, char *device_path, u64 devid) 
	}



	if (device->writeable) {

		lock_chunks(fs_info);

		mutex_lock(&fs_info->chunk_mutex);

		list_del_init(&device->dev_alloc_list);

		device->fs_devices->rw_devices--;

		unlock_chunks(fs_info);

		mutex_unlock(&fs_info->chunk_mutex);

		clear_super = true;

	}
@@ -1982,11 +1982,11 @@ int btrfs_rm_device(struct btrfs_fs_info *fs_info, char *device_path, u64 devid) 


error_undo:

	if (device->writeable) {

		lock_chunks(fs_info);

		mutex_lock(&fs_info->chunk_mutex);

		list_add(&device->dev_alloc_list,

			 &fs_info->fs_devices->alloc_list);

		device->fs_devices->rw_devices++;

		unlock_chunks(fs_info);

		mutex_unlock(&fs_info->chunk_mutex);

	}

	goto out;

}
@@ -2211,9 +2211,9 @@ static int btrfs_prepare_sprout(struct btrfs_fs_info *fs_info) 
	list_for_each_entry(device, &seed_devices->devices, dev_list)

		device->fs_devices = seed_devices;



	lock_chunks(fs_info);

	mutex_lock(&fs_info->chunk_mutex);

	list_splice_init(&fs_devices->alloc_list, &seed_devices->alloc_list);

	unlock_chunks(fs_info);

	mutex_unlock(&fs_info->chunk_mutex);



	fs_devices->seeding = 0;

	fs_devices->num_devices = 0;
@@ -2402,7 +2402,7 @@ int btrfs_init_new_device(struct btrfs_fs_info *fs_info, char *device_path) 
	device->fs_devices = fs_info->fs_devices;



	mutex_lock(&fs_info->fs_devices->device_list_mutex);

	lock_chunks(fs_info);

	mutex_lock(&fs_info->chunk_mutex);

	list_add_rcu(&device->dev_list, &fs_info->fs_devices->devices);

	list_add(&device->dev_alloc_list,

		 &fs_info->fs_devices->alloc_list);
@@ -2435,13 +2435,13 @@ int btrfs_init_new_device(struct btrfs_fs_info *fs_info, char *device_path) 
	 */

	btrfs_clear_space_info_full(fs_info);



	unlock_chunks(fs_info);

	mutex_unlock(&fs_info->chunk_mutex);

	mutex_unlock(&fs_info->fs_devices->device_list_mutex);



	if (seeding_dev) {

		lock_chunks(fs_info);

		mutex_lock(&fs_info->chunk_mutex);

		ret = init_first_rw_device(trans, fs_info, device);

		unlock_chunks(fs_info);

		mutex_unlock(&fs_info->chunk_mutex);

		if (ret) {

			btrfs_abort_transaction(trans, ret);

			goto error_trans;
@@ -2684,13 +2684,13 @@ int btrfs_grow_device(struct btrfs_trans_handle *trans, 
	if (!device->writeable)

		return -EACCES;



	lock_chunks(fs_info);

	mutex_lock(&fs_info->chunk_mutex);

	old_total = btrfs_super_total_bytes(super_copy);

	diff = new_size - device->total_bytes;



	if (new_size <= device->total_bytes ||

	    device->is_tgtdev_for_dev_replace) {

		unlock_chunks(fs_info);

		mutex_unlock(&fs_info->chunk_mutex);

		return -EINVAL;

	}
@@ -2705,7 +2705,7 @@ int btrfs_grow_device(struct btrfs_trans_handle *trans, 
	if (list_empty(&device->resized_list))

		list_add_tail(&device->resized_list,

			      &fs_devices->resized_devices);

	unlock_chunks(fs_info);

	mutex_unlock(&fs_info->chunk_mutex);



	return btrfs_update_device(trans, device);

}
@@ -2760,7 +2760,7 @@ static int btrfs_del_sys_chunk(struct btrfs_fs_info *fs_info, 
	u32 cur;

	struct btrfs_key key;



	lock_chunks(fs_info);

	mutex_lock(&fs_info->chunk_mutex);

	array_size = btrfs_super_sys_array_size(super_copy);



	ptr = super_copy->sys_chunk_array;
@@ -2790,7 +2790,7 @@ static int btrfs_del_sys_chunk(struct btrfs_fs_info *fs_info, 
			cur += len;

		}

	}

	unlock_chunks(fs_info);

	mutex_unlock(&fs_info->chunk_mutex);

	return ret;

}
@@ -2824,9 +2824,9 @@ int btrfs_remove_chunk(struct btrfs_trans_handle *trans, 
		return -EINVAL;

	}

	map = em->map_lookup;

	lock_chunks(fs_info);

	mutex_lock(&fs_info->chunk_mutex);

	check_system_chunk(trans, fs_info, map->type);

	unlock_chunks(fs_info);

	mutex_unlock(&fs_info->chunk_mutex);



	/*

	 * Take the device list mutex to prevent races with the final phase of
@@ -2846,14 +2846,14 @@ int btrfs_remove_chunk(struct btrfs_trans_handle *trans, 
		}



		if (device->bytes_used > 0) {

			lock_chunks(fs_info);

			mutex_lock(&fs_info->chunk_mutex);

			btrfs_device_set_bytes_used(device,

					device->bytes_used - dev_extent_len);

			spin_lock(&fs_info->free_chunk_lock);

			fs_info->free_chunk_space += dev_extent_len;

			spin_unlock(&fs_info->free_chunk_lock);

			btrfs_clear_space_info_full(fs_info);

			unlock_chunks(fs_info);

			mutex_unlock(&fs_info->chunk_mutex);

		}



		if (map->stripes[i].dev) {
@@ -4373,7 +4373,7 @@ int btrfs_shrink_device(struct btrfs_device *device, u64 new_size) 


	path->reada = READA_FORWARD;



	lock_chunks(fs_info);

	mutex_lock(&fs_info->chunk_mutex);



	btrfs_device_set_total_bytes(device, new_size);

	if (device->writeable) {
@@ -4382,7 +4382,7 @@ int btrfs_shrink_device(struct btrfs_device *device, u64 new_size) 
		fs_info->free_chunk_space -= diff;

		spin_unlock(&fs_info->free_chunk_lock);

	}

	unlock_chunks(fs_info);

	mutex_unlock(&fs_info->chunk_mutex);



again:

	key.objectid = device->devid;
@@ -4454,7 +4454,7 @@ int btrfs_shrink_device(struct btrfs_device *device, u64 new_size) 
		goto done;

	}



	lock_chunks(fs_info);

	mutex_lock(&fs_info->chunk_mutex);



	/*

	 * We checked in the above loop all device extents that were already in
@@ -4474,7 +4474,7 @@ int btrfs_shrink_device(struct btrfs_device *device, u64 new_size) 


		if (contains_pending_extent(trans->transaction, device,

					    &start, len)) {

			unlock_chunks(fs_info);

			mutex_unlock(&fs_info->chunk_mutex);

			checked_pending_chunks = true;

			failed = 0;

			retried = false;
@@ -4492,7 +4492,7 @@ int btrfs_shrink_device(struct btrfs_device *device, u64 new_size) 


	WARN_ON(diff > old_total);

	btrfs_set_super_total_bytes(super_copy, old_total - diff);

	unlock_chunks(fs_info);

	mutex_unlock(&fs_info->chunk_mutex);



	/* Now btrfs_update_device() will change the on-disk size. */

	ret = btrfs_update_device(trans, device);
@@ -4500,14 +4500,14 @@ int btrfs_shrink_device(struct btrfs_device *device, u64 new_size) 
done:

	btrfs_free_path(path);

	if (ret) {

		lock_chunks(fs_info);

		mutex_lock(&fs_info->chunk_mutex);

		btrfs_device_set_total_bytes(device, old_size);

		if (device->writeable)

			device->fs_devices->total_rw_bytes += diff;

		spin_lock(&fs_info->free_chunk_lock);

		fs_info->free_chunk_space += diff;

		spin_unlock(&fs_info->free_chunk_lock);

		unlock_chunks(fs_info);

		mutex_unlock(&fs_info->chunk_mutex);

	}

	return ret;

}
@@ -4521,11 +4521,11 @@ static int btrfs_add_system_chunk(struct btrfs_fs_info *fs_info, 
	u32 array_size;

	u8 *ptr;



	lock_chunks(fs_info);

	mutex_lock(&fs_info->chunk_mutex);

	array_size = btrfs_super_sys_array_size(super_copy);

	if (array_size + item_size + sizeof(disk_key)

			> BTRFS_SYSTEM_CHUNK_ARRAY_SIZE) {

		unlock_chunks(fs_info);

		mutex_unlock(&fs_info->chunk_mutex);

		return -EFBIG;

	}
@@ -4536,7 +4536,7 @@ static int btrfs_add_system_chunk(struct btrfs_fs_info *fs_info, 
	memcpy(ptr, chunk, item_size);

	item_size += sizeof(disk_key);

	btrfs_set_super_sys_array_size(super_copy, array_size + item_size);

	unlock_chunks(fs_info);

	mutex_unlock(&fs_info->chunk_mutex);



	return 0;

}
@@ -6783,7 +6783,7 @@ int btrfs_read_chunk_tree(struct btrfs_fs_info *fs_info) 
		return -ENOMEM;



	mutex_lock(&uuid_mutex);

	lock_chunks(fs_info);

	mutex_lock(&fs_info->chunk_mutex);



	/*

	 * Read all device items, and then all the chunk items. All
@@ -6850,7 +6850,7 @@ int btrfs_read_chunk_tree(struct btrfs_fs_info *fs_info) 
	}

	ret = 0;

error:

	unlock_chunks(fs_info);

	mutex_unlock(&fs_info->chunk_mutex);

	mutex_unlock(&uuid_mutex);



	btrfs_free_path(path);
@@ -7149,13 +7149,13 @@ void btrfs_update_commit_device_size(struct btrfs_fs_info *fs_info) 
		return;



	mutex_lock(&fs_devices->device_list_mutex);

	lock_chunks(fs_info);

	mutex_lock(&fs_info->chunk_mutex);

	list_for_each_entry_safe(curr, next, &fs_devices->resized_devices,

				 resized_list) {

		list_del_init(&curr->resized_list);

		curr->commit_total_bytes = curr->disk_total_bytes;

	}

	unlock_chunks(fs_info);

	mutex_unlock(&fs_info->chunk_mutex);

	mutex_unlock(&fs_devices->device_list_mutex);

}
@@ -7172,7 +7172,7 @@ void btrfs_update_commit_device_bytes_used(struct btrfs_fs_info *fs_info, 
		return;



	/* In order to kick the device replace finish process */

	lock_chunks(fs_info);

	mutex_lock(&fs_info->chunk_mutex);

	list_for_each_entry(em, &transaction->pending_chunks, list) {

		map = em->map_lookup;
@@ -7181,7 +7181,7 @@ void btrfs_update_commit_device_bytes_used(struct btrfs_fs_info *fs_info, 
			dev->commit_bytes_used = dev->bytes_used;

		}

	}

	unlock_chunks(fs_info);

	mutex_unlock(&fs_info->chunk_mutex);

}



void btrfs_set_fs_info_ptr(struct btrfs_fs_info *fs_info)

fs/btrfs/volumes.h

+0 −10
Original line number Diff line number Diff line
@@ -534,16 +534,6 @@ void btrfs_update_commit_device_size(struct btrfs_fs_info *fs_info); 
void btrfs_update_commit_device_bytes_used(struct btrfs_fs_info *fs_info,

					struct btrfs_transaction *transaction);



static inline void lock_chunks(struct btrfs_fs_info *fs_info)

{

	mutex_lock(&fs_info->chunk_mutex);

}



static inline void unlock_chunks(struct btrfs_fs_info *fs_info)

{

	mutex_unlock(&fs_info->chunk_mutex);

}



struct list_head *btrfs_get_fs_uuids(void);

void btrfs_set_fs_info_ptr(struct btrfs_fs_info *fs_info);

void btrfs_reset_fs_info_ptr(struct btrfs_fs_info *fs_info);