From 3b3a015ad4ab1ad0cf707ccbaef1dbe965993a4a Mon Sep 17 00:00:00 2001 From: Wolfgang Wiedmeyer Date: Fri, 23 Oct 2015 04:06:23 +0200 Subject: merged more uncritical stuff from 3.2.72 --- fs/btrfs/relocation.c | 43 +++++++++++++++++++++++-------------------- 1 file changed, 23 insertions(+), 20 deletions(-) (limited to 'fs/btrfs/relocation.c') diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c index 2ab5837..cfb5543 100644 --- a/fs/btrfs/relocation.c +++ b/fs/btrfs/relocation.c @@ -670,7 +670,6 @@ struct backref_node *build_backref_tree(struct reloc_control *rc, int cowonly; int ret; int err = 0; - bool need_check = true; path1 = btrfs_alloc_path(); path2 = btrfs_alloc_path(); @@ -893,7 +892,6 @@ again: cur->bytenr); lower = cur; - need_check = true; for (; level < BTRFS_MAX_LEVEL; level++) { if (!path2->nodes[level]) { BUG_ON(btrfs_root_bytenr(&root->root_item) != @@ -937,12 +935,14 @@ again: /* * add the block to pending list if we - * need check its backrefs, we only do this once - * while walking up a tree as we will catch - * anything else later on. + * need check its backrefs. only block + * at 'cur->level + 1' is added to the + * tail of pending list. this guarantees + * we check backrefs from lower level + * blocks to upper level blocks. */ - if (!upper->checked && need_check) { - need_check = false; + if (!upper->checked && + level == cur->level + 1) { list_add_tail(&edge->list[UPPER], &list); } else @@ -1174,6 +1174,8 @@ static int clone_backref_node(struct btrfs_trans_handle *trans, list_add_tail(&new_edge->list[UPPER], &new_node->lower); } + } else { + list_add_tail(&new_node->lower, &cache->leaves); } rb_node = tree_insert(&cache->rb_root, new_node->bytenr, @@ -2041,8 +2043,7 @@ static noinline_for_stack int merge_reloc_root(struct reloc_control *rc, BUG_ON(IS_ERR(trans)); trans->block_rsv = rc->block_rsv; - ret = btrfs_block_rsv_check(trans, root, rc->block_rsv, - min_reserved, 0); + ret = btrfs_block_rsv_refill(root, rc->block_rsv, min_reserved); if (ret) { BUG_ON(ret != -EAGAIN); ret = btrfs_commit_transaction(trans, root); @@ -2152,8 +2153,7 @@ int prepare_to_merge(struct reloc_control *rc, int err) again: if (!err) { num_bytes = rc->merging_rsv_size; - ret = btrfs_block_rsv_add(NULL, root, rc->block_rsv, - num_bytes); + ret = btrfs_block_rsv_add(root, rc->block_rsv, num_bytes); if (ret) err = ret; } @@ -2427,7 +2427,7 @@ static int reserve_metadata_space(struct btrfs_trans_handle *trans, num_bytes = calcu_metadata_size(rc, node, 1) * 2; trans->block_rsv = rc->block_rsv; - ret = btrfs_block_rsv_add(trans, root, rc->block_rsv, num_bytes); + ret = btrfs_block_rsv_add(root, rc->block_rsv, num_bytes); if (ret) { if (ret == -EAGAIN) rc->commit_transaction = 1; @@ -2922,6 +2922,7 @@ static int relocate_file_extent_cluster(struct inode *inode, unsigned long last_index; struct page *page; struct file_ra_state *ra; + gfp_t mask = btrfs_alloc_write_mask(inode->i_mapping); int nr = 0; int ret = 0; @@ -2946,7 +2947,9 @@ static int relocate_file_extent_cluster(struct inode *inode, index = (cluster->start - offset) >> PAGE_CACHE_SHIFT; last_index = (cluster->end - offset) >> PAGE_CACHE_SHIFT; while (index <= last_index) { + mutex_lock(&inode->i_mutex); ret = btrfs_delalloc_reserve_metadata(inode, PAGE_CACHE_SIZE); + mutex_unlock(&inode->i_mutex); if (ret) goto out; @@ -2955,7 +2958,8 @@ static int relocate_file_extent_cluster(struct inode *inode, page_cache_sync_readahead(inode->i_mapping, ra, NULL, index, last_index + 1 - index); - page = grab_cache_page(inode->i_mapping, index); + page = find_or_create_page(inode->i_mapping, index, + mask); if (!page) { btrfs_delalloc_release_metadata(inode, PAGE_CACHE_SIZE); @@ -3322,8 +3326,11 @@ static int find_data_references(struct reloc_control *rc, } key.objectid = ref_objectid; - key.offset = ref_offset; key.type = BTRFS_EXTENT_DATA_KEY; + if (ref_offset > ((u64)-1 << 32)) + key.offset = 0; + else + key.offset = ref_offset; path->search_commit_root = 1; path->skip_locking = 1; @@ -3644,14 +3651,11 @@ int prepare_to_relocate(struct reloc_control *rc) * btrfs_init_reloc_root will use them when there * is no reservation in transaction handle. */ - ret = btrfs_block_rsv_add(NULL, rc->extent_root, rc->block_rsv, + ret = btrfs_block_rsv_add(rc->extent_root, rc->block_rsv, rc->extent_root->nodesize * 256); if (ret) 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; rc->extents_found = 0; @@ -3776,8 +3780,7 @@ restart: } } - ret = btrfs_block_rsv_check(trans, rc->extent_root, - rc->block_rsv, 0, 5); + ret = btrfs_block_rsv_check(rc->extent_root, rc->block_rsv, 5); if (ret < 0) { if (ret != -EAGAIN) { err = ret; -- cgit v1.1