diff options
Diffstat (limited to 'fs/btrfs/relocation.c')
| -rw-r--r-- | fs/btrfs/relocation.c | 109 |
1 files changed, 93 insertions, 16 deletions
diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c index b37d723b9d4..045c9c2b2d7 100644 --- a/fs/btrfs/relocation.c +++ b/fs/btrfs/relocation.c @@ -29,6 +29,7 @@ #include "locking.h" #include "btrfs_inode.h" #include "async-thread.h" +#include "free-space-cache.h" /* * backref_node, mapping_node and tree_block start with this @@ -178,8 +179,6 @@ struct reloc_control { u64 search_start; u64 extents_found; - int block_rsv_retries; - unsigned int stage:8; unsigned int create_reloc_tree:1; unsigned int merge_reloc_tree:1; @@ -2133,7 +2132,6 @@ int prepare_to_merge(struct reloc_control *rc, int err) LIST_HEAD(reloc_roots); u64 num_bytes = 0; int ret; - int retries = 0; mutex_lock(&root->fs_info->trans_mutex); rc->merging_rsv_size += root->nodesize * (BTRFS_MAX_LEVEL - 1) * 2; @@ -2143,7 +2141,7 @@ again: if (!err) { num_bytes = rc->merging_rsv_size; ret = btrfs_block_rsv_add(NULL, root, rc->block_rsv, - num_bytes, &retries); + num_bytes); if (ret) err = ret; } @@ -2155,7 +2153,6 @@ again: btrfs_end_transaction(trans, rc->extent_root); btrfs_block_rsv_release(rc->extent_root, rc->block_rsv, num_bytes); - retries = 0; goto again; } } @@ -2405,15 +2402,13 @@ 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, - &rc->block_rsv_retries); + ret = btrfs_block_rsv_add(trans, root, rc->block_rsv, num_bytes); if (ret) { if (ret == -EAGAIN) rc->commit_transaction = 1; return ret; } - rc->block_rsv_retries = 0; return 0; } @@ -3099,6 +3094,8 @@ static int add_tree_block(struct reloc_control *rc, BUG_ON(item_size != sizeof(struct btrfs_extent_item_v0)); ret = get_ref_objectid_v0(rc, path, extent_key, &ref_owner, NULL); + if (ret < 0) + return ret; BUG_ON(ref_owner >= BTRFS_MAX_LEVEL); level = (int)ref_owner; /* FIXME: get real generation */ @@ -3191,6 +3188,54 @@ static int block_use_full_backref(struct reloc_control *rc, return ret; } +static int delete_block_group_cache(struct btrfs_fs_info *fs_info, + struct inode *inode, u64 ino) +{ + struct btrfs_key key; + struct btrfs_path *path; + struct btrfs_root *root = fs_info->tree_root; + struct btrfs_trans_handle *trans; + unsigned long nr; + int ret = 0; + + if (inode) + goto truncate; + + key.objectid = ino; + key.type = BTRFS_INODE_ITEM_KEY; + key.offset = 0; + + inode = btrfs_iget(fs_info->sb, &key, root, NULL); + if (!inode || IS_ERR(inode) || is_bad_inode(inode)) { + if (inode && !IS_ERR(inode)) + iput(inode); + return -ENOENT; + } + +truncate: + path = btrfs_alloc_path(); + if (!path) { + ret = -ENOMEM; + goto out; + } + + trans = btrfs_join_transaction(root, 0); + if (IS_ERR(trans)) { + btrfs_free_path(path); + goto out; + } + + ret = btrfs_truncate_free_space_cache(root, trans, path, inode); + + btrfs_free_path(path); + nr = trans->blocks_used; + btrfs_end_transaction(trans, root); + btrfs_btree_balance_dirty(root, nr); +out: + iput(inode); + return ret; +} + /* * helper to add tree blocks for backref of type BTRFS_EXTENT_DATA_REF_KEY * this function scans fs tree to find blocks reference the data extent @@ -3217,15 +3262,27 @@ static int find_data_references(struct reloc_control *rc, int counted; int ret; - path = btrfs_alloc_path(); - if (!path) - return -ENOMEM; - ref_root = btrfs_extent_data_ref_root(leaf, ref); ref_objectid = btrfs_extent_data_ref_objectid(leaf, ref); ref_offset = btrfs_extent_data_ref_offset(leaf, ref); ref_count = btrfs_extent_data_ref_count(leaf, ref); + /* + * This is an extent belonging to the free space cache, lets just delete + * it and redo the search. + */ + if (ref_root == BTRFS_ROOT_TREE_OBJECTID) { + ret = delete_block_group_cache(rc->extent_root->fs_info, + NULL, ref_objectid); + if (ret != -ENOENT) + return ret; + ret = 0; + } + + path = btrfs_alloc_path(); + if (!path) + return -ENOMEM; + root = read_fs_root(rc->extent_root->fs_info, ref_root); if (IS_ERR(root)) { err = PTR_ERR(root); @@ -3554,8 +3611,7 @@ int prepare_to_relocate(struct reloc_control *rc) * is no reservation in transaction handle. */ ret = btrfs_block_rsv_add(NULL, rc->extent_root, rc->block_rsv, - rc->extent_root->nodesize * 256, - &rc->block_rsv_retries); + rc->extent_root->nodesize * 256); if (ret) return ret; @@ -3567,7 +3623,6 @@ int prepare_to_relocate(struct reloc_control *rc) rc->extents_found = 0; rc->nodes_relocated = 0; rc->merging_rsv_size = 0; - rc->block_rsv_retries = 0; rc->create_reloc_tree = 1; set_reloc_control(rc); @@ -3860,6 +3915,8 @@ int btrfs_relocate_block_group(struct btrfs_root *extent_root, u64 group_start) { struct btrfs_fs_info *fs_info = extent_root->fs_info; struct reloc_control *rc; + struct inode *inode; + struct btrfs_path *path; int ret; int rw = 0; int err = 0; @@ -3882,6 +3939,26 @@ int btrfs_relocate_block_group(struct btrfs_root *extent_root, u64 group_start) rw = 1; } + path = btrfs_alloc_path(); + if (!path) { + err = -ENOMEM; + goto out; + } + + inode = lookup_free_space_inode(fs_info->tree_root, rc->block_group, + path); + btrfs_free_path(path); + + if (!IS_ERR(inode)) + ret = delete_block_group_cache(fs_info, inode, 0); + else + ret = PTR_ERR(inode); + + if (ret && ret != -ENOENT) { + err = ret; + goto out; + } + rc->data_inode = create_reloc_inode(fs_info, rc->block_group); if (IS_ERR(rc->data_inode)) { err = PTR_ERR(rc->data_inode); @@ -4143,7 +4220,7 @@ int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len) btrfs_add_ordered_sum(inode, ordered, sums); } btrfs_put_ordered_extent(ordered); - return 0; + return ret; } void btrfs_reloc_cow_block(struct btrfs_trans_handle *trans, |