diff options
Diffstat (limited to 'fs/btrfs/free-space-cache.c')
| -rw-r--r-- | fs/btrfs/free-space-cache.c | 177 |
1 files changed, 0 insertions, 177 deletions
diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c index 572c75d2169b..7d1ceeeb3067 100644 --- a/fs/btrfs/free-space-cache.c +++ b/fs/btrfs/free-space-cache.c @@ -16,7 +16,6 @@ #include "transaction.h" #include "disk-io.h" #include "extent_io.h" -#include "inode-map.h" #include "volumes.h" #include "space-info.h" #include "delalloc-space.h" @@ -37,10 +36,6 @@ static int link_free_space(struct btrfs_free_space_ctl *ctl, struct btrfs_free_space *info); static void unlink_free_space(struct btrfs_free_space_ctl *ctl, struct btrfs_free_space *info); -static int btrfs_wait_cache_io_root(struct btrfs_root *root, - struct btrfs_trans_handle *trans, - struct btrfs_io_ctl *io_ctl, - struct btrfs_path *path); static int search_bitmap(struct btrfs_free_space_ctl *ctl, struct btrfs_free_space *bitmap_info, u64 *offset, u64 *bytes, bool for_alloc); @@ -1222,14 +1217,6 @@ out: } -static int btrfs_wait_cache_io_root(struct btrfs_root *root, - struct btrfs_trans_handle *trans, - struct btrfs_io_ctl *io_ctl, - struct btrfs_path *path) -{ - return __btrfs_wait_cache_io(root, trans, NULL, io_ctl, path, 0); -} - int btrfs_wait_cache_io(struct btrfs_trans_handle *trans, struct btrfs_block_group *block_group, struct btrfs_path *path) @@ -3807,170 +3794,6 @@ int btrfs_trim_block_group_bitmaps(struct btrfs_block_group *block_group, return ret; } -/* - * Find the left-most item in the cache tree, and then return the - * smallest inode number in the item. - * - * Note: the returned inode number may not be the smallest one in - * the tree, if the left-most item is a bitmap. - */ -u64 btrfs_find_ino_for_alloc(struct btrfs_root *fs_root) -{ - struct btrfs_free_space_ctl *ctl = fs_root->free_ino_ctl; - struct btrfs_free_space *entry = NULL; - u64 ino = 0; - - spin_lock(&ctl->tree_lock); - - if (RB_EMPTY_ROOT(&ctl->free_space_offset)) - goto out; - - entry = rb_entry(rb_first(&ctl->free_space_offset), - struct btrfs_free_space, offset_index); - - if (!entry->bitmap) { - ino = entry->offset; - - unlink_free_space(ctl, entry); - entry->offset++; - entry->bytes--; - if (!entry->bytes) - kmem_cache_free(btrfs_free_space_cachep, entry); - else - link_free_space(ctl, entry); - } else { - u64 offset = 0; - u64 count = 1; - int ret; - - ret = search_bitmap(ctl, entry, &offset, &count, true); - /* Logic error; Should be empty if it can't find anything */ - ASSERT(!ret); - - ino = offset; - bitmap_clear_bits(ctl, entry, offset, 1); - if (entry->bytes == 0) - free_bitmap(ctl, entry); - } -out: - spin_unlock(&ctl->tree_lock); - - return ino; -} - -struct inode *lookup_free_ino_inode(struct btrfs_root *root, - struct btrfs_path *path) -{ - struct inode *inode = NULL; - - spin_lock(&root->ino_cache_lock); - if (root->ino_cache_inode) - inode = igrab(root->ino_cache_inode); - spin_unlock(&root->ino_cache_lock); - if (inode) - return inode; - - inode = __lookup_free_space_inode(root, path, 0); - if (IS_ERR(inode)) - return inode; - - spin_lock(&root->ino_cache_lock); - if (!btrfs_fs_closing(root->fs_info)) - root->ino_cache_inode = igrab(inode); - spin_unlock(&root->ino_cache_lock); - - return inode; -} - -int create_free_ino_inode(struct btrfs_root *root, - struct btrfs_trans_handle *trans, - struct btrfs_path *path) -{ - return __create_free_space_inode(root, trans, path, - BTRFS_FREE_INO_OBJECTID, 0); -} - -int load_free_ino_cache(struct btrfs_fs_info *fs_info, struct btrfs_root *root) -{ - struct btrfs_free_space_ctl *ctl = root->free_ino_ctl; - struct btrfs_path *path; - struct inode *inode; - int ret = 0; - u64 root_gen = btrfs_root_generation(&root->root_item); - - if (!btrfs_test_opt(fs_info, INODE_MAP_CACHE)) - return 0; - - /* - * If we're unmounting then just return, since this does a search on the - * normal root and not the commit root and we could deadlock. - */ - if (btrfs_fs_closing(fs_info)) - return 0; - - path = btrfs_alloc_path(); - if (!path) - return 0; - - inode = lookup_free_ino_inode(root, path); - if (IS_ERR(inode)) - goto out; - - if (root_gen != BTRFS_I(inode)->generation) - goto out_put; - - ret = __load_free_space_cache(root, inode, ctl, path, 0); - - if (ret < 0) - btrfs_err(fs_info, - "failed to load free ino cache for root %llu", - root->root_key.objectid); -out_put: - iput(inode); -out: - btrfs_free_path(path); - return ret; -} - -int btrfs_write_out_ino_cache(struct btrfs_root *root, - struct btrfs_trans_handle *trans, - struct btrfs_path *path, - struct inode *inode) -{ - struct btrfs_fs_info *fs_info = root->fs_info; - struct btrfs_free_space_ctl *ctl = root->free_ino_ctl; - int ret; - struct btrfs_io_ctl io_ctl; - bool release_metadata = true; - - if (!btrfs_test_opt(fs_info, INODE_MAP_CACHE)) - return 0; - - memset(&io_ctl, 0, sizeof(io_ctl)); - ret = __btrfs_write_out_cache(root, inode, ctl, NULL, &io_ctl, trans); - if (!ret) { - /* - * At this point writepages() didn't error out, so our metadata - * reservation is released when the writeback finishes, at - * inode.c:btrfs_finish_ordered_io(), regardless of it finishing - * with or without an error. - */ - release_metadata = false; - ret = btrfs_wait_cache_io_root(root, trans, &io_ctl, path); - } - - if (ret) { - if (release_metadata) - btrfs_delalloc_release_metadata(BTRFS_I(inode), - inode->i_size, true); - btrfs_debug(fs_info, - "failed to write free ino cache for root %llu error %d", - root->root_key.objectid, ret); - } - - return ret; -} - #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS /* * Use this if you need to make a bitmap or extent entry specifically, it |