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Btrfs: wire up the free space tree to the extent tree 

The free space tree is updated in tandem with the extent tree. There are
only a handful of places where we need to hook in:

1. Block group creation
2. Block group deletion
3. Delayed refs (extent creation and deletion)
4. Block group caching

Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: Chris Mason <clm@fb.com>
This commit is contained in:
Omar Sandoval 2015-09-29 20:50:37 -07:00 committed by Chris Mason
parent 7c55ee0c4a
commit 1e144fb8f4
1 changed files with 33 additions and 3 deletions
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36
fs/btrfs/extent-tree.c
View File

@ -33,6 +33,7 @@
#include "raid56.h"
#include "locking.h"
#include "free-space-cache.h"
#include "free-space-tree.h"
#include "math.h"
#include "sysfs.h"
#include "qgroup.h"
@ -518,7 +519,10 @@ static noinline void caching_thread(struct btrfs_work *work)
mutex_lock(&caching_ctl->mutex);
down_read(&fs_info->commit_root_sem);
ret = load_extent_tree_free(caching_ctl);
if (btrfs_fs_compat_ro(fs_info, FREE_SPACE_TREE))
ret = load_free_space_tree(caching_ctl);
else
ret = load_extent_tree_free(caching_ctl);
spin_lock(&block_group->lock);
block_group->caching_ctl = NULL;
@ -624,8 +628,8 @@ static int cache_block_group(struct btrfs_block_group_cache *cache,
}
} else {
/*
* We are not going to do the fast caching, set cached to the
* appropriate value and wakeup any waiters.
* We're either using the free space tree or no caching at all.
* Set cached to the appropriate value and wakeup any waiters.
*/
spin_lock(&cache->lock);
if (load_cache_only) {
@ -6479,6 +6483,13 @@ static int __btrfs_free_extent(struct btrfs_trans_handle *trans,
}
}
ret = add_to_free_space_tree(trans, root->fs_info, bytenr,
num_bytes);
if (ret) {
btrfs_abort_transaction(trans, extent_root, ret);
goto out;
}
ret = update_block_group(trans, root, bytenr, num_bytes, 0);
if (ret) {
btrfs_abort_transaction(trans, extent_root, ret);
@ -7422,6 +7433,11 @@ static int alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
btrfs_mark_buffer_dirty(path->nodes[0]);
btrfs_free_path(path);
ret = remove_from_free_space_tree(trans, fs_info, ins->objectid,
ins->offset);
if (ret)
return ret;
ret = update_block_group(trans, root, ins->objectid, ins->offset, 1);
if (ret) { /* -ENOENT, logic error */
btrfs_err(fs_info, "update block group failed for %llu %llu",
@ -7503,6 +7519,11 @@ static int alloc_reserved_tree_block(struct btrfs_trans_handle *trans,
btrfs_mark_buffer_dirty(leaf);
btrfs_free_path(path);
ret = remove_from_free_space_tree(trans, fs_info, ins->objectid,
num_bytes);
if (ret)
return ret;
ret = update_block_group(trans, root, ins->objectid, root->nodesize,
1);
if (ret) { /* -ENOENT, logic error */
@ -9370,6 +9391,8 @@ btrfs_create_block_group_cache(struct btrfs_root *root, u64 start, u64 size)
cache->full_stripe_len = btrfs_full_stripe_len(root,
&root->fs_info->mapping_tree,
start);
set_free_space_tree_thresholds(cache);
atomic_set(&cache->count, 1);
spin_lock_init(&cache->lock);
init_rwsem(&cache->data_rwsem);
@ -9592,6 +9615,8 @@ void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans,
key.objectid, key.offset);
if (ret)
btrfs_abort_transaction(trans, extent_root, ret);
add_block_group_free_space(trans, root->fs_info, block_group);
/* already aborted the transaction if it failed. */
next:
list_del_init(&block_group->bg_list);
}
@ -9622,6 +9647,7 @@ int btrfs_make_block_group(struct btrfs_trans_handle *trans,
cache->flags = type;
cache->last_byte_to_unpin = (u64)-1;
cache->cached = BTRFS_CACHE_FINISHED;
cache->needs_free_space = 1;
ret = exclude_super_stripes(root, cache);
if (ret) {
/*
@ -9984,6 +10010,10 @@ int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
unlock_chunks(root);
ret = remove_block_group_free_space(trans, root->fs_info, block_group);
if (ret)
goto out;
btrfs_put_block_group(block_group);
btrfs_put_block_group(block_group);