diff options
Diffstat (limited to 'fs/btrfs/extent-tree.c')
| -rw-r--r-- | fs/btrfs/extent-tree.c | 333 |
1 files changed, 156 insertions, 177 deletions
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index e3b3e13a4817..564260872c7e 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -53,24 +53,6 @@ __btrfs_find_block_group(struct btrfs_root *root, struct btrfs_block_group_cache *hint, u64 search_start, int data, int owner); -void maybe_lock_mutex(struct btrfs_root *root) -{ - if (root != root->fs_info->extent_root && - root != root->fs_info->chunk_root && - root != root->fs_info->dev_root) { - mutex_lock(&root->fs_info->alloc_mutex); - } -} - -void maybe_unlock_mutex(struct btrfs_root *root) -{ - if (root != root->fs_info->extent_root && - root != root->fs_info->chunk_root && - root != root->fs_info->dev_root) { - mutex_unlock(&root->fs_info->alloc_mutex); - } -} - static int block_group_bits(struct btrfs_block_group_cache *cache, u64 bits) { return (cache->flags & bits) == bits; @@ -164,6 +146,7 @@ static int add_new_free_space(struct btrfs_block_group_cache *block_group, u64 extent_start, extent_end, size; int ret; + mutex_lock(&info->pinned_mutex); while (start < end) { ret = find_first_extent_bit(&info->pinned_extents, start, &extent_start, &extent_end, @@ -175,7 +158,8 @@ static int add_new_free_space(struct btrfs_block_group_cache *block_group, start = extent_end + 1; } else if (extent_start > start && extent_start < end) { size = extent_start - start; - ret = btrfs_add_free_space(block_group, start, size); + ret = btrfs_add_free_space_lock(block_group, start, + size); BUG_ON(ret); start = extent_end + 1; } else { @@ -185,9 +169,10 @@ static int add_new_free_space(struct btrfs_block_group_cache *block_group, if (start < end) { size = end - start; - ret = btrfs_add_free_space(block_group, start, size); + ret = btrfs_add_free_space_lock(block_group, start, size); BUG_ON(ret); } + mutex_unlock(&info->pinned_mutex); return 0; } @@ -445,13 +430,11 @@ int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len) path = btrfs_alloc_path(); BUG_ON(!path); - maybe_lock_mutex(root); key.objectid = start; key.offset = len; btrfs_set_key_type(&key, BTRFS_EXTENT_ITEM_KEY); ret = btrfs_search_slot(NULL, root->fs_info->extent_root, &key, path, 0, 0); - maybe_unlock_mutex(root); btrfs_free_path(path); return ret; } @@ -676,8 +659,9 @@ static int __btrfs_update_extent_ref(struct btrfs_trans_handle *trans, BUG_ON(owner_objectid >= BTRFS_MAX_LEVEL); num_bytes = btrfs_level_size(root, (int)owner_objectid); + mutex_lock(&root->fs_info->extent_ins_mutex); if (test_range_bit(&root->fs_info->extent_ins, bytenr, - bytenr + num_bytes - 1, EXTENT_LOCKED, 0)) { + bytenr + num_bytes - 1, EXTENT_WRITEBACK, 0)) { u64 priv; ret = get_state_private(&root->fs_info->extent_ins, bytenr, &priv); @@ -686,6 +670,7 @@ static int __btrfs_update_extent_ref(struct btrfs_trans_handle *trans, (unsigned long)priv; BUG_ON(extent_op->parent != orig_parent); BUG_ON(extent_op->generation != orig_generation); + extent_op->parent = parent; extent_op->generation = ref_generation; } else { @@ -703,10 +688,11 @@ static int __btrfs_update_extent_ref(struct btrfs_trans_handle *trans, set_extent_bits(&root->fs_info->extent_ins, bytenr, bytenr + num_bytes - 1, - EXTENT_LOCKED, GFP_NOFS); + EXTENT_WRITEBACK, GFP_NOFS); set_state_private(&root->fs_info->extent_ins, bytenr, (unsigned long)extent_op); } + mutex_unlock(&root->fs_info->extent_ins_mutex); return 0; } @@ -742,12 +728,10 @@ int btrfs_update_extent_ref(struct btrfs_trans_handle *trans, if (ref_root == BTRFS_TREE_LOG_OBJECTID && owner_objectid < BTRFS_FIRST_FREE_OBJECTID) return 0; - maybe_lock_mutex(root); ret = __btrfs_update_extent_ref(trans, root, bytenr, orig_parent, parent, ref_root, ref_root, ref_generation, ref_generation, owner_objectid); - maybe_unlock_mutex(root); return ret; } @@ -817,11 +801,9 @@ int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, if (ref_root == BTRFS_TREE_LOG_OBJECTID && owner_objectid < BTRFS_FIRST_FREE_OBJECTID) return 0; - maybe_lock_mutex(root); ret = __btrfs_inc_extent_ref(trans, root, bytenr, 0, parent, 0, ref_root, 0, ref_generation, owner_objectid); - maybe_unlock_mutex(root); return ret; } @@ -886,7 +868,6 @@ static int get_reference_status(struct btrfs_root *root, u64 bytenr, key.type = BTRFS_EXTENT_ITEM_KEY; path = btrfs_alloc_path(); - mutex_lock(&root->fs_info->alloc_mutex); ret = btrfs_search_slot(NULL, extent_root, &key, path, 0, 0); if (ret < 0) goto out; @@ -953,7 +934,6 @@ static int get_reference_status(struct btrfs_root *root, u64 bytenr, } ret = 0; out: - mutex_unlock(&root->fs_info->alloc_mutex); btrfs_free_path(path); return ret; } @@ -1179,13 +1159,11 @@ int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, nr_file_extents++; - maybe_lock_mutex(root); ret = process_func(trans, root, bytenr, orig_buf->start, buf->start, orig_root, ref_root, orig_generation, ref_generation, key.objectid); - maybe_unlock_mutex(root); if (ret) { faili = i; @@ -1194,13 +1172,11 @@ int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, } } else { bytenr = btrfs_node_blockptr(buf, i); - maybe_lock_mutex(root); ret = process_func(trans, root, bytenr, orig_buf->start, buf->start, orig_root, ref_root, orig_generation, ref_generation, level - 1); - maybe_unlock_mutex(root); if (ret) { faili = i; WARN_ON(1); @@ -1270,24 +1246,20 @@ int btrfs_update_ref(struct btrfs_trans_handle *trans, bytenr = btrfs_file_extent_disk_bytenr(buf, fi); if (bytenr == 0) continue; - maybe_lock_mutex(root); ret = __btrfs_update_extent_ref(trans, root, bytenr, orig_buf->start, buf->start, orig_root, ref_root, orig_generation, ref_generation, key.objectid); - maybe_unlock_mutex(root); if (ret) goto fail; } else { bytenr = btrfs_node_blockptr(buf, slot); - maybe_lock_mutex(root); ret = __btrfs_update_extent_ref(trans, root, bytenr, orig_buf->start, buf->start, orig_root, ref_root, orig_generation, ref_generation, level - 1); - maybe_unlock_mutex(root); if (ret) goto fail; } @@ -1344,7 +1316,6 @@ int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans, if (!path) return -ENOMEM; - mutex_lock(&root->fs_info->alloc_mutex); while(1) { cache = NULL; spin_lock(&root->fs_info->block_group_cache_lock); @@ -1378,7 +1349,6 @@ int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans, } } btrfs_free_path(path); - mutex_unlock(&root->fs_info->alloc_mutex); return werr; } @@ -1390,9 +1360,11 @@ static int update_space_info(struct btrfs_fs_info *info, u64 flags, found = __find_space_info(info, flags); if (found) { + spin_lock(&found->lock); found->total_bytes += total_bytes; found->bytes_used += bytes_used; found->full = 0; + spin_unlock(&found->lock); *space_info = found; return 0; } @@ -1479,43 +1451,53 @@ static int do_chunk_alloc(struct btrfs_trans_handle *trans, } BUG_ON(!space_info); + spin_lock(&space_info->lock); if (space_info->force_alloc) { force = 1; space_info->force_alloc = 0; } - if (space_info->full) + if (space_info->full) { + spin_unlock(&space_info->lock); goto out; + } thresh = div_factor(space_info->total_bytes, 6); if (!force && (space_info->bytes_used + space_info->bytes_pinned + - space_info->bytes_reserved + alloc_bytes) < thresh) + space_info->bytes_reserved + alloc_bytes) < thresh) { + spin_unlock(&space_info->lock); goto out; + } - while (!mutex_trylock(&extent_root->fs_info->chunk_mutex)) { - if (!force) - goto out; - mutex_unlock(&extent_root->fs_info->alloc_mutex); - cond_resched(); - mutex_lock(&extent_root->fs_info->alloc_mutex); + spin_unlock(&space_info->lock); + + ret = mutex_trylock(&extent_root->fs_info->chunk_mutex); + if (!ret && !force) { + goto out; + } else if (!ret) { + mutex_lock(&extent_root->fs_info->chunk_mutex); waited = 1; } - if (waited && space_info->full) - goto out_unlock; + if (waited) { + spin_lock(&space_info->lock); + if (space_info->full) { + spin_unlock(&space_info->lock); + goto out_unlock; + } + spin_unlock(&space_info->lock); + } ret = btrfs_alloc_chunk(trans, extent_root, &start, &num_bytes, flags); - if (ret == -ENOSPC) { + if (ret) { printk("space info full %Lu\n", flags); space_info->full = 1; goto out_unlock; } - BUG_ON(ret); ret = btrfs_make_block_group(trans, extent_root, 0, flags, BTRFS_FIRST_CHUNK_TREE_OBJECTID, start, num_bytes); BUG_ON(ret); - out_unlock: mutex_unlock(&extent_root->fs_info->chunk_mutex); out: @@ -1533,7 +1515,6 @@ static int update_block_group(struct btrfs_trans_handle *trans, u64 old_val; u64 byte_in_group; - WARN_ON(!mutex_is_locked(&root->fs_info->alloc_mutex)); while(total) { cache = btrfs_lookup_block_group(info, bytenr); if (!cache) { @@ -1542,6 +1523,7 @@ static int update_block_group(struct btrfs_trans_handle *trans, byte_in_group = bytenr - cache->key.objectid; WARN_ON(byte_in_group > cache->key.offset); + spin_lock(&cache->space_info->lock); spin_lock(&cache->lock); cache->dirty = 1; old_val = btrfs_block_group_used(&cache->item); @@ -1551,11 +1533,13 @@ static int update_block_group(struct btrfs_trans_handle *trans, cache->space_info->bytes_used += num_bytes; btrfs_set_block_group_used(&cache->item, old_val); spin_unlock(&cache->lock); + spin_unlock(&cache->space_info->lock); } else { old_val -= num_bytes; cache->space_info->bytes_used -= num_bytes; btrfs_set_block_group_used(&cache->item, old_val); spin_unlock(&cache->lock); + spin_unlock(&cache->space_info->lock); if (mark_free) { int ret; ret = btrfs_add_free_space(cache, bytenr, @@ -1588,7 +1572,7 @@ int btrfs_update_pinned_extents(struct btrfs_root *root, struct btrfs_block_group_cache *cache; struct btrfs_fs_info *fs_info = root->fs_info; - WARN_ON(!mutex_is_locked(&root->fs_info->alloc_mutex)); + WARN_ON(!mutex_is_locked(&root->fs_info->pinned_mutex)); if (pin) { set_extent_dirty(&fs_info->pinned_extents, bytenr, bytenr + num - 1, GFP_NOFS); @@ -1602,16 +1586,20 @@ int btrfs_update_pinned_extents(struct btrfs_root *root, len = min(num, cache->key.offset - (bytenr - cache->key.objectid)); if (pin) { + spin_lock(&cache->space_info->lock); spin_lock(&cache->lock); cache->pinned += len; cache->space_info->bytes_pinned += len; spin_unlock(&cache->lock); + spin_unlock(&cache->space_info->lock); fs_info->total_pinned += len; } else { + spin_lock(&cache->space_info->lock); spin_lock(&cache->lock); cache->pinned -= len; cache->space_info->bytes_pinned -= len; spin_unlock(&cache->lock); + spin_unlock(&cache->space_info->lock); fs_info->total_pinned -= len; } bytenr += len; @@ -1627,23 +1615,23 @@ static int update_reserved_extents(struct btrfs_root *root, struct btrfs_block_group_cache *cache; struct btrfs_fs_info *fs_info = root->fs_info; - WARN_ON(!mutex_is_locked(&root->fs_info->alloc_mutex)); while (num > 0) { cache = btrfs_lookup_block_group(fs_info, bytenr); BUG_ON(!cache); len = min(num, cache->key.offset - (bytenr - cache->key.objectid)); + + spin_lock(&cache->space_info->lock); + spin_lock(&cache->lock); if (reserve) { - spin_lock(&cache->lock); cache->reserved += len; cache->space_info->bytes_reserved += len; - spin_unlock(&cache->lock); } else { - spin_lock(&cache->lock); cache->reserved -= len; cache->space_info->bytes_reserved -= len; - spin_unlock(&cache->lock); } + spin_unlock(&cache->lock); + spin_unlock(&cache->space_info->lock); bytenr += len; num -= len; } @@ -1658,6 +1646,7 @@ int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy) struct extent_io_tree *pinned_extents = &root->fs_info->pinned_extents; int ret; + mutex_lock(&root->fs_info->pinned_mutex); while(1) { ret = find_first_extent_bit(pinned_extents, last, &start, &end, EXTENT_DIRTY); @@ -1666,6 +1655,7 @@ int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy) set_extent_dirty(copy, start, end, GFP_NOFS); last = end + 1; } + mutex_unlock(&root->fs_info->pinned_mutex); return 0; } @@ -1678,7 +1668,7 @@ int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans, int ret; struct btrfs_block_group_cache *cache; - mutex_lock(&root->fs_info->alloc_mutex); + mutex_lock(&root->fs_info->pinned_mutex); while(1) { ret = find_first_extent_bit(unpin, 0, &start, &end, EXTENT_DIRTY); @@ -1690,12 +1680,12 @@ int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans, if (cache->cached) btrfs_add_free_space(cache, start, end - start + 1); if (need_resched()) { - mutex_unlock(&root->fs_info->alloc_mutex); + mutex_unlock(&root->fs_info->pinned_mutex); cond_resched(); - mutex_lock(&root->fs_info->alloc_mutex); + mutex_lock(&root->fs_info->pinned_mutex); } } - mutex_unlock(&root->fs_info->alloc_mutex); + mutex_unlock(&root->fs_info->pinned_mutex); return 0; } @@ -1705,6 +1695,7 @@ static int finish_current_insert(struct btrfs_trans_handle *trans, u64 start; u64 end; u64 priv; + u64 search = 0; struct btrfs_fs_info *info = extent_root->fs_info; struct btrfs_path *path; struct btrfs_extent_ref *ref; @@ -1714,20 +1705,37 @@ static int finish_current_insert(struct btrfs_trans_handle *trans, int ret; int err = 0; - WARN_ON(!mutex_is_locked(&extent_root->fs_info->alloc_mutex)); btrfs_set_stack_extent_refs(&extent_item, 1); path = btrfs_alloc_path(); while(1) { - ret = find_first_extent_bit(&info->extent_ins, 0, &start, - &end, EXTENT_LOCKED); - if (ret) + mutex_lock(&info->extent_ins_mutex); + ret = find_first_extent_bit(&info->extent_ins, search, &start, + &end, EXTENT_WRITEBACK); + if (ret) { + mutex_unlock(&info->extent_ins_mutex); + if (search) { + search = 0; + continue; + } break; + } + + ret = try_lock_extent(&info->extent_ins, start, end, GFP_NOFS); + if (!ret) { + search = end+1; + mutex_unlock(&info->extent_ins_mutex); + cond_resched(); + continue; + } + BUG_ON(ret < 0); ret = get_state_private(&info->extent_ins, start, &priv); BUG_ON(ret); extent_op = (struct pending_extent_op *)(unsigned long)priv; + mutex_unlock(&info->extent_ins_mutex); + if (extent_op->type == PENDING_EXTENT_INSERT) { key.objectid = start; key.offset = end + 1 - start; @@ -1736,8 +1744,10 @@ static int finish_current_insert(struct btrfs_trans_handle *trans, &extent_item, sizeof(extent_item)); BUG_ON(err); + mutex_lock(&info->extent_ins_mutex); clear_extent_bits(&info->extent_ins, start, end, - EXTENT_LOCKED, GFP_NOFS); + EXTENT_WRITEBACK, GFP_NOFS); + mutex_unlock(&info->extent_ins_mutex); err = insert_extent_backref(trans, extent_root, path, start, extent_op->parent, @@ -1753,8 +1763,10 @@ static int finish_current_insert(struct btrfs_trans_handle *trans, extent_op->level, 0); BUG_ON(err); + mutex_lock(&info->extent_ins_mutex); clear_extent_bits(&info->extent_ins, start, end, - EXTENT_LOCKED, GFP_NOFS); + EXTENT_WRITEBACK, GFP_NOFS); + mutex_unlock(&info->extent_ins_mutex); key.objectid = start; key.offset = extent_op->parent; @@ -1772,12 +1784,10 @@ static int finish_current_insert(struct btrfs_trans_handle *trans, BUG_ON(1); } kfree(extent_op); + unlock_extent(&info->extent_ins, start, end, GFP_NOFS); + search = 0; - if (need_resched()) { - mutex_unlock(&extent_root->fs_info->alloc_mutex); - cond_resched(); - mutex_lock(&extent_root->fs_info->alloc_mutex); - } + cond_resched(); } btrfs_free_path(path); return 0; @@ -1790,7 +1800,6 @@ static int pin_down_bytes(struct btrfs_trans_handle *trans, int err = 0; struct extent_buffer *buf; - WARN_ON(!mutex_is_locked(&root->fs_info->alloc_mutex)); if (is_data) goto pinit; @@ -1847,7 +1856,6 @@ static int __free_extent(struct btrfs_trans_handle *trans, struct btrfs_extent_item *ei; u32 refs; - WARN_ON(!mutex_is_locked(&root->fs_info->alloc_mutex)); key.objectid = bytenr; btrfs_set_key_type(&key, BTRFS_EXTENT_ITEM_KEY); key.offset = num_bytes; @@ -1935,8 +1943,10 @@ static int __free_extent(struct btrfs_trans_handle *trans, #endif if (pin) { + mutex_lock(&root->fs_info->pinned_mutex); ret = pin_down_bytes(trans, root, bytenr, num_bytes, owner_objectid >= BTRFS_FIRST_FREE_OBJECTID); + mutex_unlock(&root->fs_info->pinned_mutex); if (ret > 0) mark_free = 1; BUG_ON(ret < 0); @@ -1956,6 +1966,7 @@ static int __free_extent(struct btrfs_trans_handle *trans, ret = btrfs_del_items(trans, extent_root, path, path->slots[0], num_to_del); BUG_ON(ret); + btrfs_release_path(extent_root, path); ret = update_block_group(trans, root, bytenr, num_bytes, 0, mark_free); BUG_ON(ret); @@ -1994,70 +2005,91 @@ static int del_pending_extents(struct btrfs_trans_handle *trans, struct { int ret; int err = 0; - int mark_free = 0; u64 start; u64 end; u64 priv; + u64 search = 0; struct extent_io_tree *pending_del; struct extent_io_tree *extent_ins; struct pending_extent_op *extent_op; + struct btrfs_fs_info *info = extent_root->fs_info; - WARN_ON(!mutex_is_locked(&extent_root->fs_info->alloc_mutex)); extent_ins = &extent_root->fs_info->extent_ins; pending_del = &extent_root->fs_info->pending_del; while(1) { - ret = find_first_extent_bit(pending_del, 0, &start, &end, - EXTENT_LOCKED); - if (ret) + mutex_lock(&info->extent_ins_mutex); + ret = find_first_extent_bit(pending_del, search, &start, &end, + EXTENT_WRITEBACK); + if (ret) { + mutex_unlock(&info->extent_ins_mutex); + if (search) { + search = 0; + continue; + } break; + } + + ret = try_lock_extent(extent_ins, start, end, GFP_NOFS); + if (!ret) { + search = end+1; + mutex_unlock(&info->extent_ins_mutex); + cond_resched(); + continue; + } + BUG_ON(ret < 0); ret = get_state_private(pending_del, start, &priv); BUG_ON(ret); extent_op = (struct pending_extent_op *)(unsigned long)priv; - clear_extent_bits(pending_del, start, end, EXTENT_LOCKED, + clear_extent_bits(pending_del, start, end, EXTENT_WRITEBACK, GFP_NOFS); - - ret = pin_down_bytes(trans, extent_root, start, - end + 1 - start, 0); - mark_free = ret > 0; if (!test_range_bit(extent_ins, start, end, - EXTENT_LOCKED, 0)) { + EXTENT_WRITEBACK, 0)) { + mutex_unlock(&info->extent_ins_mutex); free_extent: ret = __free_extent(trans, extent_root, start, end + 1 - start, extent_op->orig_parent, extent_root->root_key.objectid, extent_op->orig_generation, - extent_op->level, 0, mark_free); + extent_op->level, 1, 0); kfree(extent_op); } else { kfree(extent_op); - ret = get_state_private(extent_ins, start, &priv); + + ret = get_state_private(&info->extent_ins, start, + &priv); BUG_ON(ret); extent_op = (struct pending_extent_op *) - (unsigned long)priv; + (unsigned long)priv; + + clear_extent_bits(&info->extent_ins, start, end, + EXTENT_WRITEBACK, GFP_NOFS); - clear_extent_bits(extent_ins, start, end, - EXTENT_LOCKED, GFP_NOFS); + mutex_unlock(&info->extent_ins_mutex); if (extent_op->type == PENDING_BACKREF_UPDATE) goto free_extent; + mutex_lock(&extent_root->fs_info->pinned_mutex); + ret = pin_down_bytes(trans, extent_root, start, + end + 1 - start, 0); + mutex_unlock(&extent_root->fs_info->pinned_mutex); + ret = update_block_group(trans, extent_root, start, - end + 1 - start, 0, mark_free); + end + 1 - start, 0, ret > 0); + BUG_ON(ret); kfree(extent_op); } if (ret) err = ret; + unlock_extent(extent_ins, start, end, GFP_NOFS); - if (need_resched()) { - mutex_unlock(&extent_root->fs_info->alloc_mutex); - cond_resched(); - mutex_lock(&extent_root->fs_info->alloc_mutex); - } + search = 0; + cond_resched(); } return err; } @@ -2091,11 +2123,13 @@ static int __btrfs_free_extent(struct btrfs_trans_handle *trans, extent_op->orig_generation = ref_generation; extent_op->level = (int)owner_objectid; + mutex_lock(&root->fs_info->extent_ins_mutex); set_extent_bits(&root->fs_info->pending_del, bytenr, bytenr + num_bytes - 1, - EXTENT_LOCKED, GFP_NOFS); + EXTENT_WRITEBACK, GFP_NOFS); set_state_private(&root->fs_info->pending_del, bytenr, (unsigned long)extent_op); + mutex_unlock(&root->fs_info->extent_ins_mutex); return 0; } /* if metadata always pin */ @@ -2134,11 +2168,9 @@ int btrfs_free_extent(struct btrfs_trans_handle *trans, { int ret; - maybe_lock_mutex(root); ret = __btrfs_free_extent(trans, root, bytenr, num_bytes, parent, root_objectid, ref_generation, owner_objectid, pin); - maybe_unlock_mutex(root); return ret; } @@ -2214,12 +2246,16 @@ static int noinline find_free_extent(struct btrfs_trans_handle *trans, * group thats not of the proper type, while looping this * should never happen */ + WARN_ON(!block_group); + mutex_lock(&block_group->alloc_mutex); if (unlikely(!block_group_bits(block_group, data))) goto new_group; ret = cache_block_group(root, block_group); - if (ret) + if (ret) { + mutex_unlock(&block_group->alloc_mutex); break; + } if (block_group->ro) goto new_group; @@ -2250,8 +2286,10 @@ static int noinline find_free_extent(struct btrfs_trans_handle *trans, * then we just re-search this block group */ if (search_start >= start && - search_start < end) + search_start < end) { + mutex_unlock(&block_group->alloc_mutex); continue; + } /* else we go to the next block group */ goto new_group; @@ -2259,10 +2297,15 @@ static int noinline find_free_extent(struct btrfs_trans_handle *trans, ins->objectid = search_start; ins->offset = num_bytes; + + btrfs_remove_free_space_lock(block_group, search_start, + num_bytes); /* we are all good, lets return */ + mutex_unlock(&block_group->alloc_mutex); break; } new_group: + mutex_unlock(&block_group->alloc_mutex); /* * Here's how this works. * loop == 0: we were searching a block group via a hint @@ -2363,7 +2406,6 @@ static int __btrfs_reserve_extent(struct btrfs_trans_handle *trans, u64 search_start = 0; u64 alloc_profile; struct btrfs_fs_info *info = root->fs_info; - struct btrfs_block_group_cache *cache; if (data) { alloc_profile = info->avail_data_alloc_bits & @@ -2419,13 +2461,6 @@ again: dump_space_info(sinfo, num_bytes); BUG(); } - cache = btrfs_lookup_block_group(root->fs_info, ins->objectid); - if (!cache) { - printk(KERN_ERR "Unable to find block group for %Lu\n", ins->objectid); - return -ENOSPC; - } - - ret = btrfs_remove_free_space(cache, ins->objectid, ins->offset); return ret; } @@ -2434,16 +2469,13 @@ int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len) { struct btrfs_block_group_cache *cache; - maybe_lock_mutex(root); cache = btrfs_lookup_block_group(root->fs_info, start); if (!cache) { printk(KERN_ERR "Unable to find block group for %Lu\n", start); - maybe_unlock_mutex(root); return -ENOSPC; } btrfs_add_free_space(cache, start, len); update_reserved_extents(root, start, len, 0); - maybe_unlock_mutex(root); return 0; } @@ -2455,12 +2487,10 @@ int btrfs_reserve_extent(struct btrfs_trans_handle *trans, u64 data) { int ret; - maybe_lock_mutex(root); ret = __btrfs_reserve_extent(trans, root, num_bytes, min_alloc_size, empty_size, hint_byte, search_end, ins, data); update_reserved_extents(root, ins->objectid, ins->offset, 1); - maybe_unlock_mutex(root); return ret; } @@ -2510,11 +2540,13 @@ static int __btrfs_alloc_reserved_extent(struct btrfs_trans_handle *trans, extent_op->orig_generation = 0; extent_op->level = (int)owner; + mutex_lock(&root->fs_info->extent_ins_mutex); set_extent_bits(&root->fs_info->extent_ins, ins->objectid, ins->objectid + ins->offset - 1, - EXTENT_LOCKED, GFP_NOFS); + EXTENT_WRITEBACK, GFP_NOFS); set_state_private(&root->fs_info->extent_ins, ins->objectid, (unsigned long)extent_op); + mutex_unlock(&root->fs_info->extent_ins_mutex); goto update_block; } @@ -2578,11 +2610,9 @@ int btrfs_alloc_reserved_extent(struct btrfs_trans_handle *trans, if (root_objectid == BTRFS_TREE_LOG_OBJECTID) return 0; - maybe_lock_mutex(root); ret = __btrfs_alloc_reserved_extent(trans, root, parent, root_objectid, ref_generation, owner, ins); update_reserved_extents(root, ins->objectid, ins->offset, 0); - maybe_unlock_mutex(root); return ret; } @@ -2599,15 +2629,16 @@ int btrfs_alloc_logged_extent(struct btrfs_trans_handle *trans, int ret; struct btrfs_block_group_cache *block_group; - maybe_lock_mutex(root); block_group = btrfs_lookup_block_group(root->fs_info, ins->objectid); + mutex_lock(&block_group->alloc_mutex); cache_block_group(root, block_group); - ret = btrfs_remove_free_space(block_group, ins->objectid, ins->offset); + ret = btrfs_remove_free_space_lock(block_group, ins->objectid, + ins->offset); + mutex_unlock(&block_group->alloc_mutex); BUG_ON(ret); ret = __btrfs_alloc_reserved_extent(trans, root, parent, root_objectid, ref_generation, owner, ins); - maybe_unlock_mutex(root); return ret; } @@ -2627,8 +2658,6 @@ int btrfs_alloc_extent(struct btrfs_trans_handle *trans, { int ret; - maybe_lock_mutex(root); - ret = __btrfs_reserve_extent(trans, root, num_bytes, min_alloc_size, empty_size, hint_byte, search_end, ins, data); @@ -2642,7 +2671,6 @@ int btrfs_alloc_extent(struct btrfs_trans_handle *trans, } else { update_reserved_extents(root, ins->objectid, ins->offset, 1); } - maybe_unlock_mutex(root); return ret; } @@ -2734,12 +2762,10 @@ int btrfs_drop_leaf_ref(struct btrfs_trans_handle *trans, if (disk_bytenr == 0) continue; - mutex_lock(&root->fs_info->alloc_mutex); ret = __btrfs_free_extent(trans, root, disk_bytenr, btrfs_file_extent_disk_num_bytes(leaf, fi), leaf->start, leaf_owner, leaf_generation, key.objectid, 0); - mutex_unlock(&root->fs_info->alloc_mutex); BUG_ON(ret); atomic_inc(&root->fs_info->throttle_gen); @@ -2758,12 +2784,10 @@ static int noinline cache_drop_leaf_ref(struct btrfs_trans_handle *trans, struct btrfs_extent_info *info = ref->extents; for (i = 0; i < ref->nritems; i++) { - mutex_lock(&root->fs_info->alloc_mutex); ret = __btrfs_free_extent(trans, root, info->bytenr, info->num_bytes, ref->bytenr, ref->owner, ref->generation, info->objectid, 0); - mutex_unlock(&root->fs_info->alloc_mutex); atomic_inc(&root->fs_info->throttle_gen); wake_up(&root->fs_info->transaction_throttle); @@ -2875,13 +2899,11 @@ static int noinline walk_down_tree(struct btrfs_trans_handle *trans, root_gen = btrfs_header_generation(parent); path->slots[*level]++; - mutex_lock(&root->fs_info->alloc_mutex); ret = __btrfs_free_extent(trans, root, bytenr, blocksize, parent->start, root_owner, root_gen, *level - 1, 1); BUG_ON(ret); - mutex_unlock(&root->fs_info->alloc_mutex); atomic_inc(&root->fs_info->throttle_gen); wake_up(&root->fs_info->transaction_throttle); @@ -2957,11 +2979,9 @@ out: root_owner = btrfs_header_owner(parent); root_gen = btrfs_header_generation(parent); - mutex_lock(&root->fs_info->alloc_mutex); ret = __btrfs_free_extent(trans, root, bytenr, blocksize, parent->start, root_owner, root_gen, *level, 1); - mutex_unlock(&root->fs_info->alloc_mutex); free_extent_buffer(path->nodes[*level]); path->nodes[*level] = NULL; *level += 1; @@ -3440,8 +3460,6 @@ static int noinline __next_ref_path(struct btrfs_trans_handle *trans, if (!path) return -ENOMEM; - mutex_lock(&extent_root->fs_info->alloc_mutex); - if (first_time) { ref_path->lowest_level = -1; ref_path->current_level = -1; @@ -3498,9 +3516,7 @@ next: level--; btrfs_release_path(extent_root, path); if (need_resched()) { - mutex_unlock(&extent_root->fs_info->alloc_mutex); cond_resched(); - mutex_lock(&extent_root->fs_info->alloc_mutex); } } /* reached lowest level */ @@ -3613,15 +3629,12 @@ found: btrfs_release_path(extent_root, path); if (need_resched()) { - mutex_unlock(&extent_root->fs_info->alloc_mutex); cond_resched(); - mutex_lock(&extent_root->fs_info->alloc_mutex); } } /* reached max tree level, but no tree root found. */ BUG(); out: - mutex_unlock(&extent_root->fs_info->alloc_mutex); btrfs_free_path(path); return ret; } @@ -4556,14 +4569,6 @@ static int noinline relocate_tree_block(struct btrfs_trans_handle *trans, struct btrfs_ref_path *ref_path) { int ret; - int needs_lock = 0; - - if (root == root->fs_info->extent_root || - root == root->fs_info->chunk_root || - root == root->fs_info->dev_root) { - needs_lock = 1; - mutex_lock(&root->fs_info->alloc_mutex); - } ret = relocate_one_path(trans, root, path, first_key, ref_path, NULL, NULL); @@ -4571,8 +4576,6 @@ static int noinline relocate_tree_block(struct btrfs_trans_handle *trans, if (root == root->fs_info->extent_root) btrfs_extent_post_op(trans, root); - if (needs_lock) - mutex_unlock(&root->fs_info->alloc_mutex); return 0; } @@ -4584,14 +4587,12 @@ static int noinline del_extent_zero(struct btrfs_trans_handle *trans, { int ret; - mutex_lock(&extent_root->fs_info->alloc_mutex); ret = btrfs_search_slot(trans, extent_root, extent_key, path, -1, 1); if (ret) goto out; ret = btrfs_del_item(trans, extent_root, path); out: btrfs_release_path(extent_root, path); - mutex_unlock(&extent_root->fs_info->alloc_mutex); return ret; } @@ -4627,7 +4628,6 @@ static int noinline relocate_one_extent(struct btrfs_root *extent_root, struct btrfs_key first_key; u64 prev_block = 0; - mutex_unlock(&extent_root->fs_info->alloc_mutex); trans = btrfs_start_transaction(extent_root, 1); BUG_ON(!trans); @@ -4754,7 +4754,6 @@ out: btrfs_end_transaction(trans, extent_root); kfree(new_extents); kfree(ref_path); - mutex_lock(&extent_root->fs_info->alloc_mutex); return ret; } @@ -4807,10 +4806,8 @@ int __alloc_chunk_for_shrink(struct btrfs_root *root, spin_lock(&shrink_block_group->lock); if (btrfs_block_group_used(&shrink_block_group->item) > 0) { spin_unlock(&shrink_block_group->lock); - mutex_unlock(&root->fs_info->alloc_mutex); trans = btrfs_start_transaction(root, 1); - mutex_lock(&root->fs_info->alloc_mutex); spin_lock(&shrink_block_group->lock); new_alloc_flags = update_block_group_flags(root, @@ -4826,9 +4823,7 @@ int __alloc_chunk_for_shrink(struct btrfs_root *root, do_chunk_alloc(trans, root->fs_info->extent_root, calc + 2 * 1024 * 1024, new_alloc_flags, force); - mutex_unlock(&root->fs_info->alloc_mutex); btrfs_end_transaction(trans, root); - mutex_lock(&root->fs_info->alloc_mutex); } else spin_unlock(&shrink_block_group->lock); return 0; @@ -4952,14 +4947,10 @@ int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start) reloc_inode = create_reloc_inode(info, block_group); BUG_ON(IS_ERR(reloc_inode)); - mutex_lock(&root->fs_info->alloc_mutex); - __alloc_chunk_for_shrink(root, block_group, 1); block_group->ro = 1; block_group->space_info->total_bytes -= block_group->key.offset; - mutex_unlock(&root->fs_info->alloc_mutex); - btrfs_start_delalloc_inodes(info->tree_root); btrfs_wait_ordered_extents(info->tree_root, 0); again: @@ -4978,8 +4969,6 @@ again: btrfs_remove_leaf_refs(info->tree_root, (u64)-1, 1); mutex_unlock(&root->fs_info->cleaner_mutex); - mutex_lock(&root->fs_info->alloc_mutex); - while(1) { ret = btrfs_search_slot(NULL, root, &key, path, 0, 0); if (ret < 0) @@ -5007,9 +4996,7 @@ next: if (progress && need_resched()) { btrfs_release_path(root, path); - mutex_unlock(&root->fs_info->alloc_mutex); cond_resched(); - mutex_lock(&root->fs_info->alloc_mutex); progress = 0; continue; } @@ -5036,7 +5023,6 @@ next: } btrfs_release_path(root, path); - mutex_unlock(&root->fs_info->alloc_mutex); if (pass == 0) { btrfs_wait_ordered_range(reloc_inode, 0, (u64)-1); @@ -5058,8 +5044,6 @@ next: trans = btrfs_start_transaction(info->tree_root, 1); btrfs_commit_transaction(trans, info->tree_root); - mutex_lock(&root->fs_info->alloc_mutex); - spin_lock(&block_group->lock); WARN_ON(block_group->pinned > 0); WARN_ON(block_group->reserved > 0); @@ -5067,7 +5051,6 @@ next: spin_unlock(&block_group->lock); ret = 0; out: - mutex_unlock(&root->fs_info->alloc_mutex); btrfs_free_path(path); return ret; } @@ -5114,7 +5097,6 @@ int btrfs_free_block_groups(struct btrfs_fs_info *info) struct btrfs_block_group_cache *block_group; struct rb_node *n; - mutex_lock(&info->alloc_mutex); spin_lock(&info->block_group_cache_lock); while ((n = rb_last(&info->block_group_cache_tree)) != NULL) { block_group = rb_entry(n, struct btrfs_block_group_cache, @@ -5132,7 +5114,6 @@ int btrfs_free_block_groups(struct btrfs_fs_info *info) kfree(block_group); } spin_unlock(&info->block_group_cache_lock); - mutex_unlock(&info->alloc_mutex); return 0; } @@ -5155,7 +5136,6 @@ int btrfs_read_block_groups(struct btrfs_root *root) if (!path) return -ENOMEM; - mutex_lock(&root->fs_info->alloc_mutex); while(1) { ret = find_first_block_group(root, path, &key); if (ret > 0) { @@ -5174,6 +5154,7 @@ int btrfs_read_block_groups(struct btrfs_root *root) } spin_lock_init(&cache->lock); + mutex_init(&cache->alloc_mutex); INIT_LIST_HEAD(&cache->list); read_extent_buffer(leaf, &cache->item, btrfs_item_ptr_offset(leaf, path->slots[0]), @@ -5201,7 +5182,6 @@ int btrfs_read_block_groups(struct btrfs_root *root) ret = 0; error: btrfs_free_path(path); - mutex_unlock(&root->fs_info->alloc_mutex); return ret; } @@ -5214,7 +5194,6 @@ int btrfs_make_block_group(struct btrfs_trans_handle *trans, struct btrfs_root *extent_root; struct btrfs_block_group_cache *cache; - WARN_ON(!mutex_is_locked(&root->fs_info->alloc_mutex)); extent_root = root->fs_info->extent_root; root->fs_info->last_trans_new_blockgroup = trans->transid; @@ -5226,6 +5205,7 @@ int btrfs_make_block_group(struct btrfs_trans_handle *trans, cache->key.objectid = chunk_offset; cache->key.offset = size; spin_lock_init(&cache->lock); + mutex_init(&cache->alloc_mutex); INIT_LIST_HEAD(&cache->list); btrfs_set_key_type(&cache->key, BTRFS_BLOCK_GROUP_ITEM_KEY); @@ -5264,7 +5244,6 @@ int btrfs_remove_block_group(struct btrfs_trans_handle *trans, struct btrfs_key key; int ret; - BUG_ON(!mutex_is_locked(&root->fs_info->alloc_mutex)); root = root->fs_info->extent_root; block_group = btrfs_lookup_block_group(root->fs_info, group_start); |
