Commit 37be25bc authored by Josef Bacik's avatar Josef Bacik
Browse files

Btrfs: kill the durable block rsv stuff 



This is confusing code and isn't used by anything anymore, so delete it.

Signed-off-by: default avatarJosef Bacik <josef@redhat.com>
parent dba68306

fs/btrfs/ctree.h

+0 −11
Original line number Diff line number Diff line
@@ -772,13 +772,10 @@ struct btrfs_space_info { 
struct btrfs_block_rsv {

	u64 size;

	u64 reserved;

	u64 freed[2];

	struct btrfs_space_info *space_info;

	struct list_head list;

	spinlock_t lock;

	atomic_t usage;

	unsigned int priority:8;

	unsigned int durable:1;

	unsigned int refill_used:1;

	unsigned int full:1;

};
@@ -840,7 +837,6 @@ struct btrfs_block_group_cache { 
	spinlock_t lock;

	u64 pinned;

	u64 reserved;

	u64 reserved_pinned;

	u64 bytes_super;

	u64 flags;

	u64 sectorsize;
@@ -919,11 +915,6 @@ struct btrfs_fs_info { 


	struct btrfs_block_rsv empty_block_rsv;



	/* list of block reservations that cross multiple transactions */

	struct list_head durable_block_rsv_list;



	struct mutex durable_block_rsv_mutex;



	u64 generation;

	u64 last_trans_committed;
@@ -2238,8 +2229,6 @@ void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv); 
struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root);

void btrfs_free_block_rsv(struct btrfs_root *root,

			  struct btrfs_block_rsv *rsv);

void btrfs_add_durable_block_rsv(struct btrfs_fs_info *fs_info,

				 struct btrfs_block_rsv *rsv);

int btrfs_block_rsv_add(struct btrfs_trans_handle *trans,

			struct btrfs_root *root,

			struct btrfs_block_rsv *block_rsv,

fs/btrfs/disk-io.c

+0 −2
Original line number Diff line number Diff line
@@ -1665,8 +1665,6 @@ struct btrfs_root *open_ctree(struct super_block *sb, 
	btrfs_init_block_rsv(&fs_info->trans_block_rsv);

	btrfs_init_block_rsv(&fs_info->chunk_block_rsv);

	btrfs_init_block_rsv(&fs_info->empty_block_rsv);

	INIT_LIST_HEAD(&fs_info->durable_block_rsv_list);

	mutex_init(&fs_info->durable_block_rsv_mutex);

	atomic_set(&fs_info->nr_async_submits, 0);

	atomic_set(&fs_info->async_delalloc_pages, 0);

	atomic_set(&fs_info->async_submit_draining, 0);

fs/btrfs/extent-tree.c

+17 −83
Original line number Diff line number Diff line
@@ -121,7 +121,6 @@ void btrfs_put_block_group(struct btrfs_block_group_cache *cache) 
	if (atomic_dec_and_test(&cache->count)) {

		WARN_ON(cache->pinned > 0);

		WARN_ON(cache->reserved > 0);

		WARN_ON(cache->reserved_pinned > 0);

		kfree(cache->free_space_ctl);

		kfree(cache);

	}
@@ -3662,7 +3661,6 @@ void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv) 
	spin_lock_init(&rsv->lock);

	atomic_set(&rsv->usage, 1);

	rsv->priority = 6;

	INIT_LIST_HEAD(&rsv->list);

}



struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root)
@@ -3685,25 +3683,10 @@ void btrfs_free_block_rsv(struct btrfs_root *root, 
{

	if (rsv && atomic_dec_and_test(&rsv->usage)) {

		btrfs_block_rsv_release(root, rsv, (u64)-1);

		if (!rsv->durable)

		kfree(rsv);

	}

}



/*

 * make the block_rsv struct be able to capture freed space.

 * the captured space will re-add to the the block_rsv struct

 * after transaction commit

 */

void btrfs_add_durable_block_rsv(struct btrfs_fs_info *fs_info,

				 struct btrfs_block_rsv *block_rsv)

{

	block_rsv->durable = 1;

	mutex_lock(&fs_info->durable_block_rsv_mutex);

	list_add_tail(&block_rsv->list, &fs_info->durable_block_rsv_list);

	mutex_unlock(&fs_info->durable_block_rsv_mutex);

}



int btrfs_block_rsv_add(struct btrfs_trans_handle *trans,

			struct btrfs_root *root,

			struct btrfs_block_rsv *block_rsv,
@@ -3745,8 +3728,6 @@ int btrfs_block_rsv_check(struct btrfs_trans_handle *trans, 
		ret = 0;

	} else {

		num_bytes -= block_rsv->reserved;

		if (block_rsv->durable &&

		    block_rsv->freed[0] + block_rsv->freed[1] >= num_bytes)

		commit_trans = 1;

	}

	spin_unlock(&block_rsv->lock);
@@ -3763,8 +3744,18 @@ int btrfs_block_rsv_check(struct btrfs_trans_handle *trans, 
	}



	if (commit_trans) {

		struct btrfs_space_info *sinfo = block_rsv->space_info;



		if (trans)

			return -EAGAIN;



		spin_lock(&sinfo->lock);

		if (sinfo->bytes_pinned < num_bytes) {

			spin_unlock(&sinfo->lock);

			return -ENOSPC;

		}

		spin_unlock(&sinfo->lock);



		trans = btrfs_join_transaction(root);

		BUG_ON(IS_ERR(trans));

		ret = btrfs_commit_transaction(trans, root);
@@ -3885,10 +3876,6 @@ static void init_global_block_rsv(struct btrfs_fs_info *fs_info) 
	fs_info->tree_root->block_rsv = &fs_info->global_block_rsv;

	fs_info->chunk_root->block_rsv = &fs_info->chunk_block_rsv;



	btrfs_add_durable_block_rsv(fs_info, &fs_info->global_block_rsv);



	btrfs_add_durable_block_rsv(fs_info, &fs_info->delalloc_block_rsv);



	update_global_block_rsv(fs_info);

}
@@ -4447,13 +4434,8 @@ static int unpin_extent_range(struct btrfs_root *root, u64 start, u64 end) 
		spin_lock(&cache->lock);

		cache->pinned -= len;

		cache->space_info->bytes_pinned -= len;

		if (cache->ro) {

		if (cache->ro)

			cache->space_info->bytes_readonly += len;

		} else if (cache->reserved_pinned > 0) {

			len = min(len, cache->reserved_pinned);

			cache->reserved_pinned -= len;

			cache->space_info->bytes_may_use += len;

		}

		spin_unlock(&cache->lock);

		spin_unlock(&cache->space_info->lock);

	}
@@ -4468,11 +4450,8 @@ int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans, 
{

	struct btrfs_fs_info *fs_info = root->fs_info;

	struct extent_io_tree *unpin;

	struct btrfs_block_rsv *block_rsv;

	struct btrfs_block_rsv *next_rsv;

	u64 start;

	u64 end;

	int idx;

	int ret;



	if (fs_info->pinned_extents == &fs_info->freed_extents[0])
@@ -4495,30 +4474,6 @@ int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans, 
		cond_resched();

	}



	mutex_lock(&fs_info->durable_block_rsv_mutex);

	list_for_each_entry_safe(block_rsv, next_rsv,

				 &fs_info->durable_block_rsv_list, list) {



		idx = trans->transid & 0x1;

		if (block_rsv->freed[idx] > 0) {

			block_rsv_add_bytes(block_rsv,

					    block_rsv->freed[idx], 0);

			block_rsv->freed[idx] = 0;

		}

		if (atomic_read(&block_rsv->usage) == 0) {

			btrfs_block_rsv_release(root, block_rsv, (u64)-1);



			if (block_rsv->freed[0] == 0 &&

			    block_rsv->freed[1] == 0) {

				list_del_init(&block_rsv->list);

				kfree(block_rsv);

			}

		} else {

			btrfs_block_rsv_release(root, block_rsv, 0);

		}

	}

	mutex_unlock(&fs_info->durable_block_rsv_mutex);



	return 0;

}
@@ -4820,36 +4775,18 @@ void btrfs_free_tree_block(struct btrfs_trans_handle *trans, 
		if (root->root_key.objectid != BTRFS_TREE_LOG_OBJECTID) {

			ret = check_ref_cleanup(trans, root, buf->start);

			if (!ret)

				goto pin;

				goto out;

		}



		if (btrfs_header_flag(buf, BTRFS_HEADER_FLAG_WRITTEN)) {

			pin_down_extent(root, cache, buf->start, buf->len, 1);

			goto pin;

			goto out;

		}



		WARN_ON(test_bit(EXTENT_BUFFER_DIRTY, &buf->bflags));



		btrfs_add_free_space(cache, buf->start, buf->len);

		btrfs_update_reserved_bytes(cache, buf->len, RESERVE_FREE);



		goto out;

	}

pin:

	if (block_rsv->durable && !cache->ro) {

		ret = 0;

		spin_lock(&cache->lock);

		if (!cache->ro) {

			cache->reserved_pinned += buf->len;

			ret = 1;

		}

		spin_unlock(&cache->lock);



		if (ret) {

			spin_lock(&block_rsv->lock);

			block_rsv->freed[trans->transid & 0x1] += buf->len;

			spin_unlock(&block_rsv->lock);

		}

	}

out:

	/*
@@ -6705,12 +6642,9 @@ static int set_block_group_ro(struct btrfs_block_group_cache *cache, int force) 
		    cache->bytes_super - btrfs_block_group_used(&cache->item);



	if (sinfo->bytes_used + sinfo->bytes_reserved + sinfo->bytes_pinned +

	    sinfo->bytes_may_use + sinfo->bytes_readonly +

	    cache->reserved_pinned + num_bytes + min_allocable_bytes <=

	    sinfo->total_bytes) {

	    sinfo->bytes_may_use + sinfo->bytes_readonly + num_bytes +

	    min_allocable_bytes <= sinfo->total_bytes) {

		sinfo->bytes_readonly += num_bytes;

		sinfo->bytes_may_use += cache->reserved_pinned;

		cache->reserved_pinned = 0;

		cache->ro = 1;

		ret = 0;

	}

fs/btrfs/inode.c

+0 −4
Original line number Diff line number Diff line
@@ -2164,9 +2164,6 @@ int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode) 
	}

	spin_unlock(&root->orphan_lock);



	if (block_rsv)

		btrfs_add_durable_block_rsv(root->fs_info, block_rsv);



	/* grab metadata reservation from transaction handle */

	if (reserve) {

		ret = btrfs_orphan_reserve_metadata(trans, inode);
@@ -6505,7 +6502,6 @@ static int btrfs_truncate(struct inode *inode) 
	rsv = btrfs_alloc_block_rsv(root);

	if (!rsv)

		return -ENOMEM;

	btrfs_add_durable_block_rsv(root->fs_info, rsv);



	trans = btrfs_start_transaction(root, 4);

	if (IS_ERR(trans)) {

fs/btrfs/relocation.c

+0 −1
Original line number Diff line number Diff line
@@ -3651,7 +3651,6 @@ int prepare_to_relocate(struct reloc_control *rc) 
		return ret;



	rc->block_rsv->refill_used = 1;

	btrfs_add_durable_block_rsv(rc->extent_root->fs_info, rc->block_rsv);



	memset(&rc->cluster, 0, sizeof(rc->cluster));

	rc->search_start = rc->block_group->key.objectid;

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