From 5297199a8bca12b8b96afcbf2341605efb6005de Mon Sep 17 00:00:00 2001 From: Nikolay Borisov Date: Thu, 26 Nov 2020 15:10:39 +0200 Subject: btrfs: remove inode number cache feature It's been deprecated since commit b547a88ea577 ("btrfs: start deprecation of mount option inode_cache") which enumerates the reasons. A filesystem that uses the feature (mount -o inode_cache) tracks the inode numbers in bitmaps, that data stay on the filesystem after this patch. The size is roughly 5MiB for 1M inodes [1], which is considered small enough to be left there. Removal of the change can be implemented in btrfs-progs if needed. [1] https://lore.kernel.org/linux-btrfs/20201127145836.GZ6430@twin.jikos.cz/ Signed-off-by: Nikolay Borisov Reviewed-by: David Sterba [ update changelog ] Signed-off-by: David Sterba --- fs/btrfs/Makefile | 2 +- fs/btrfs/ctree.h | 15 +- fs/btrfs/disk-io.c | 23 -- fs/btrfs/free-space-cache.c | 177 --------------- fs/btrfs/free-space-cache.h | 12 - fs/btrfs/inode-map.c | 527 -------------------------------------------- fs/btrfs/inode-map.h | 13 -- fs/btrfs/inode.c | 11 - fs/btrfs/ioctl.c | 1 - fs/btrfs/relocation.c | 1 - fs/btrfs/super.c | 13 +- fs/btrfs/transaction.c | 19 -- fs/btrfs/tree-log.c | 1 - 13 files changed, 6 insertions(+), 809 deletions(-) delete mode 100644 fs/btrfs/inode-map.c delete mode 100644 fs/btrfs/inode-map.h diff --git a/fs/btrfs/Makefile b/fs/btrfs/Makefile index 0497fdc37f90..9f1b1a88e317 100644 --- a/fs/btrfs/Makefile +++ b/fs/btrfs/Makefile @@ -3,7 +3,7 @@ obj-$(CONFIG_BTRFS_FS) := btrfs.o btrfs-y += super.o ctree.o extent-tree.o print-tree.o root-tree.o dir-item.o \ - file-item.o inode-item.o inode-map.o disk-io.o \ + file-item.o inode-item.o disk-io.o \ transaction.o inode.o file.o tree-defrag.o \ extent_map.o sysfs.o struct-funcs.o xattr.o ordered-data.o \ extent_io.o volumes.o async-thread.o ioctl.o locking.o orphan.o \ diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index 7fe74f6a2486..a0c588e5fc89 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -1077,15 +1077,6 @@ struct btrfs_root { spinlock_t accounting_lock; struct btrfs_block_rsv *block_rsv; - /* free ino cache stuff */ - struct btrfs_free_space_ctl *free_ino_ctl; - enum btrfs_caching_type ino_cache_state; - spinlock_t ino_cache_lock; - wait_queue_head_t ino_cache_wait; - struct btrfs_free_space_ctl *free_ino_pinned; - u64 ino_cache_progress; - struct inode *ino_cache_inode; - struct mutex log_mutex; wait_queue_head_t log_writer_wait; wait_queue_head_t log_commit_wait[2]; @@ -1359,7 +1350,7 @@ static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info) #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14) #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15) #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16) -#define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17) +/* bit 17 is free */ #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18) #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19) #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20) @@ -1406,9 +1397,7 @@ do { \ * transaction commit) */ -#define BTRFS_PENDING_SET_INODE_MAP_CACHE (0) -#define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1) -#define BTRFS_PENDING_COMMIT (2) +#define BTRFS_PENDING_COMMIT (0) #define btrfs_test_pending(info, opt) \ test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index 3b456c3331a2..2d8bcd075c77 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -29,7 +29,6 @@ #include "tree-log.h" #include "free-space-cache.h" #include "free-space-tree.h" -#include "inode-map.h" #include "check-integrity.h" #include "rcu-string.h" #include "dev-replace.h" @@ -1336,14 +1335,6 @@ static int btrfs_init_fs_root(struct btrfs_root *root, dev_t anon_dev) int ret; unsigned int nofs_flag; - root->free_ino_ctl = kzalloc(sizeof(*root->free_ino_ctl), GFP_NOFS); - root->free_ino_pinned = kzalloc(sizeof(*root->free_ino_pinned), - GFP_NOFS); - if (!root->free_ino_pinned || !root->free_ino_ctl) { - ret = -ENOMEM; - goto fail; - } - /* * We might be called under a transaction (e.g. indirect backref * resolution) which could deadlock if it triggers memory reclaim @@ -1360,10 +1351,6 @@ static int btrfs_init_fs_root(struct btrfs_root *root, dev_t anon_dev) btrfs_check_and_init_root_item(&root->root_item); } - btrfs_init_free_ino_ctl(root); - spin_lock_init(&root->ino_cache_lock); - init_waitqueue_head(&root->ino_cache_wait); - /* * Don't assign anonymous block device to roots that are not exposed to * userspace, the id pool is limited to 1M @@ -2033,8 +2020,6 @@ void btrfs_put_root(struct btrfs_root *root) free_anon_bdev(root->anon_dev); btrfs_drew_lock_destroy(&root->snapshot_lock); free_root_extent_buffers(root); - kfree(root->free_ino_ctl); - kfree(root->free_ino_pinned); #ifdef CONFIG_BTRFS_DEBUG spin_lock(&root->fs_info->fs_roots_radix_lock); list_del_init(&root->leak_list); @@ -3988,14 +3973,6 @@ void btrfs_drop_and_free_fs_root(struct btrfs_fs_info *fs_info, } } - if (root->free_ino_pinned) - __btrfs_remove_free_space_cache(root->free_ino_pinned); - if (root->free_ino_ctl) - __btrfs_remove_free_space_cache(root->free_ino_ctl); - if (root->ino_cache_inode) { - iput(root->ino_cache_inode); - root->ino_cache_inode = NULL; - } if (drop_ref) btrfs_put_root(root); } 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 diff --git a/fs/btrfs/free-space-cache.h b/fs/btrfs/free-space-cache.h index bf8d127d2407..66a87242690e 100644 --- a/fs/btrfs/free-space-cache.h +++ b/fs/btrfs/free-space-cache.h @@ -97,17 +97,6 @@ int btrfs_wait_cache_io(struct btrfs_trans_handle *trans, int btrfs_write_out_cache(struct btrfs_trans_handle *trans, struct btrfs_block_group *block_group, struct btrfs_path *path); -struct inode *lookup_free_ino_inode(struct btrfs_root *root, - struct btrfs_path *path); -int create_free_ino_inode(struct btrfs_root *root, - struct btrfs_trans_handle *trans, - struct btrfs_path *path); -int load_free_ino_cache(struct btrfs_fs_info *fs_info, - struct btrfs_root *root); -int btrfs_write_out_ino_cache(struct btrfs_root *root, - struct btrfs_trans_handle *trans, - struct btrfs_path *path, - struct inode *inode); void btrfs_init_free_space_ctl(struct btrfs_block_group *block_group, struct btrfs_free_space_ctl *ctl); @@ -127,7 +116,6 @@ bool btrfs_is_free_space_trimmed(struct btrfs_block_group *block_group); u64 btrfs_find_space_for_alloc(struct btrfs_block_group *block_group, u64 offset, u64 bytes, u64 empty_size, u64 *max_extent_size); -u64 btrfs_find_ino_for_alloc(struct btrfs_root *fs_root); void btrfs_dump_free_space(struct btrfs_block_group *block_group, u64 bytes); int btrfs_find_space_cluster(struct btrfs_block_group *block_group, diff --git a/fs/btrfs/inode-map.c b/fs/btrfs/inode-map.c deleted file mode 100644 index 2bc342fc5d7e..000000000000 --- a/fs/btrfs/inode-map.c +++ /dev/null @@ -1,527 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * Copyright (C) 2007 Oracle. All rights reserved. - */ - -#include -#include - -#include "ctree.h" -#include "disk-io.h" -#include "free-space-cache.h" -#include "inode-map.h" -#include "transaction.h" -#include "delalloc-space.h" - -static void fail_caching_thread(struct btrfs_root *root) -{ - struct btrfs_fs_info *fs_info = root->fs_info; - - btrfs_warn(fs_info, "failed to start inode caching task"); - btrfs_clear_pending_and_info(fs_info, INODE_MAP_CACHE, - "disabling inode map caching"); - spin_lock(&root->ino_cache_lock); - root->ino_cache_state = BTRFS_CACHE_ERROR; - spin_unlock(&root->ino_cache_lock); - wake_up(&root->ino_cache_wait); -} - -static int caching_kthread(void *data) -{ - struct btrfs_root *root = data; - struct btrfs_fs_info *fs_info = root->fs_info; - struct btrfs_free_space_ctl *ctl = root->free_ino_ctl; - struct btrfs_key key; - struct btrfs_path *path; - struct extent_buffer *leaf; - u64 last = (u64)-1; - int slot; - int ret; - - if (!btrfs_test_opt(fs_info, INODE_MAP_CACHE)) - return 0; - - path = btrfs_alloc_path(); - if (!path) { - fail_caching_thread(root); - return -ENOMEM; - } - - /* Since the commit root is read-only, we can safely skip locking. */ - path->skip_locking = 1; - path->search_commit_root = 1; - path->reada = READA_FORWARD; - - key.objectid = BTRFS_FIRST_FREE_OBJECTID; - key.offset = 0; - key.type = BTRFS_INODE_ITEM_KEY; -again: - /* need to make sure the commit_root doesn't disappear */ - down_read(&fs_info->commit_root_sem); - - ret = btrfs_search_slot(NULL, root, &key, path, 0, 0); - if (ret < 0) - goto out; - - while (1) { - if (btrfs_fs_closing(fs_info)) - goto out; - - leaf = path->nodes[0]; - slot = path->slots[0]; - if (slot >= btrfs_header_nritems(leaf)) { - ret = btrfs_next_leaf(root, path); - if (ret < 0) - goto out; - else if (ret > 0) - break; - - if (need_resched() || - btrfs_transaction_in_commit(fs_info)) { - leaf = path->nodes[0]; - - if (WARN_ON(btrfs_header_nritems(leaf) == 0)) - break; - - /* - * Save the key so we can advances forward - * in the next search. - */ - btrfs_item_key_to_cpu(leaf, &key, 0); - btrfs_release_path(path); - root->ino_cache_progress = last; - up_read(&fs_info->commit_root_sem); - schedule_timeout(1); - goto again; - } else - continue; - } - - btrfs_item_key_to_cpu(leaf, &key, slot); - - if (key.type != BTRFS_INODE_ITEM_KEY) - goto next; - - if (key.objectid >= root->highest_objectid) - break; - - if (last != (u64)-1 && last + 1 != key.objectid) { - __btrfs_add_free_space(fs_info, ctl, last + 1, - key.objectid - last - 1, 0); - wake_up(&root->ino_cache_wait); - } - - last = key.objectid; -next: - path->slots[0]++; - } - - if (last < root->highest_objectid - 1) { - __btrfs_add_free_space(fs_info, ctl, last + 1, - root->highest_objectid - last - 1, 0); - } - - spin_lock(&root->ino_cache_lock); - root->ino_cache_state = BTRFS_CACHE_FINISHED; - spin_unlock(&root->ino_cache_lock); - - root->ino_cache_progress = (u64)-1; - btrfs_unpin_free_ino(root); -out: - wake_up(&root->ino_cache_wait); - up_read(&fs_info->commit_root_sem); - - btrfs_free_path(path); - - return ret; -} - -static void start_caching(struct btrfs_root *root) -{ - struct btrfs_fs_info *fs_info = root->fs_info; - struct btrfs_free_space_ctl *ctl = root->free_ino_ctl; - struct task_struct *tsk; - int ret; - u64 objectid; - - if (!btrfs_test_opt(fs_info, INODE_MAP_CACHE)) - return; - - spin_lock(&root->ino_cache_lock); - if (root->ino_cache_state != BTRFS_CACHE_NO) { - spin_unlock(&root->ino_cache_lock); - return; - } - - root->ino_cache_state = BTRFS_CACHE_STARTED; - spin_unlock(&root->ino_cache_lock); - - ret = load_free_ino_cache(fs_info, root); - if (ret == 1) { - spin_lock(&root->ino_cache_lock); - root->ino_cache_state = BTRFS_CACHE_FINISHED; - spin_unlock(&root->ino_cache_lock); - wake_up(&root->ino_cache_wait); - return; - } - - /* - * It can be quite time-consuming to fill the cache by searching - * through the extent tree, and this can keep ino allocation path - * waiting. Therefore at start we quickly find out the highest - * inode number and we know we can use inode numbers which fall in - * [highest_ino + 1, BTRFS_LAST_FREE_OBJECTID]. - */ - ret = btrfs_find_free_objectid(root, &objectid); - if (!ret && objectid <= BTRFS_LAST_FREE_OBJECTID) { - __btrfs_add_free_space(fs_info, ctl, objectid, - BTRFS_LAST_FREE_OBJECTID - objectid + 1, - 0); - wake_up(&root->ino_cache_wait); - } - - tsk = kthread_run(caching_kthread, root, "btrfs-ino-cache-%llu", - root->root_key.objectid); - if (IS_ERR(tsk)) - fail_caching_thread(root); -} - -int btrfs_find_free_ino(struct btrfs_root *root, u64 *objectid) -{ - if (!btrfs_test_opt(root->fs_info, INODE_MAP_CACHE)) - return btrfs_find_free_objectid(root, objectid); - -again: - *objectid = btrfs_find_ino_for_alloc(root); - - if (*objectid != 0) - return 0; - - start_caching(root); - - wait_event(root->ino_cache_wait, - root->ino_cache_state == BTRFS_CACHE_FINISHED || - root->ino_cache_state == BTRFS_CACHE_ERROR || - root->free_ino_ctl->free_space > 0); - - if (root->ino_cache_state == BTRFS_CACHE_FINISHED && - root->free_ino_ctl->free_space == 0) - return -ENOSPC; - else if (root->ino_cache_state == BTRFS_CACHE_ERROR) - return btrfs_find_free_objectid(root, objectid); - else - goto again; -} - -void btrfs_return_ino(struct btrfs_root *root, u64 objectid) -{ - struct btrfs_fs_info *fs_info = root->fs_info; - struct btrfs_free_space_ctl *pinned = root->free_ino_pinned; - - if (!btrfs_test_opt(fs_info, INODE_MAP_CACHE)) - return; -again: - if (root->ino_cache_state == BTRFS_CACHE_FINISHED) { - __btrfs_add_free_space(fs_info, pinned, objectid, 1, 0); - } else { - down_write(&fs_info->commit_root_sem); - spin_lock(&root->ino_cache_lock); - if (root->ino_cache_state == BTRFS_CACHE_FINISHED) { - spin_unlock(&root->ino_cache_lock); - up_write(&fs_info->commit_root_sem); - goto again; - } - spin_unlock(&root->ino_cache_lock); - - start_caching(root); - - __btrfs_add_free_space(fs_info, pinned, objectid, 1, 0); - - up_write(&fs_info->commit_root_sem); - } -} - -/* - * When a transaction is committed, we'll move those inode numbers which are - * smaller than root->ino_cache_progress from pinned tree to free_ino tree, and - * others will just be dropped, because the commit root we were searching has - * changed. - * - * Must be called with root->fs_info->commit_root_sem held - */ -void btrfs_unpin_free_ino(struct btrfs_root *root) -{ - struct btrfs_free_space_ctl *ctl = root->free_ino_ctl; - struct rb_root *rbroot = &root->free_ino_pinned->free_space_offset; - spinlock_t *rbroot_lock = &root->free_ino_pinned->tree_lock; - struct btrfs_free_space *info; - struct rb_node *n; - u64 count; - - if (!btrfs_test_opt(root->fs_info, INODE_MAP_CACHE)) - return; - - while (1) { - spin_lock(rbroot_lock); - n = rb_first(rbroot); - if (!n) { - spin_unlock(rbroot_lock); - break; - } - - info = rb_entry(n, struct btrfs_free_space, offset_index); - BUG_ON(info->bitmap); /* Logic error */ - - if (info->offset > root->ino_cache_progress) - count = 0; - else - count = min(root->ino_cache_progress - info->offset + 1, - info->bytes); - - rb_erase(&info->offset_index, rbroot); - spin_unlock(rbroot_lock); - if (count) - __btrfs_add_free_space(root->fs_info, ctl, - info->offset, count, 0); - kmem_cache_free(btrfs_free_space_cachep, info); - } -} - -#define INIT_THRESHOLD ((SZ_32K / 2) / sizeof(struct btrfs_free_space)) -#define INODES_PER_BITMAP (PAGE_SIZE * 8) - -/* - * The goal is to keep the memory used by the free_ino tree won't - * exceed the memory if we use bitmaps only. - */ -static void recalculate_thresholds(struct btrfs_free_space_ctl *ctl) -{ - struct btrfs_free_space *info; - struct rb_node *n; - int max_ino; - int max_bitmaps; - - n = rb_last(&ctl->free_space_offset); - if (!n) { - ctl->extents_thresh = INIT_THRESHOLD; - return; - } - info = rb_entry(n, struct btrfs_free_space, offset_index); - - /* - * Find the maximum inode number in the filesystem. Note we - * ignore the fact that this can be a bitmap, because we are - * not doing precise calculation. - */ - max_ino = info->bytes - 1; - - max_bitmaps = ALIGN(max_ino, INODES_PER_BITMAP) / INODES_PER_BITMAP; - if (max_bitmaps <= ctl->total_bitmaps) { - ctl->extents_thresh = 0; - return; - } - - ctl->extents_thresh = (max_bitmaps - ctl->total_bitmaps) * - PAGE_SIZE / sizeof(*info); -} - -/* - * We don't fall back to bitmap, if we are below the extents threshold - * or this chunk of inode numbers is a big one. - */ -static bool use_bitmap(struct btrfs_free_space_ctl *ctl, - struct btrfs_free_space *info) -{ - if (ctl->free_extents < ctl->extents_thresh || - info->bytes > INODES_PER_BITMAP / 10) - return false; - - return true; -} - -static const struct btrfs_free_space_op free_ino_op = { - .recalc_thresholds = recalculate_thresholds, - .use_bitmap = use_bitmap, -}; - -static void pinned_recalc_thresholds(struct btrfs_free_space_ctl *ctl) -{ -} - -static bool pinned_use_bitmap(struct btrfs_free_space_ctl *ctl, - struct btrfs_free_space *info) -{ - /* - * We always use extents for two reasons: - * - * - The pinned tree is only used during the process of caching - * work. - * - Make code simpler. See btrfs_unpin_free_ino(). - */ - return false; -} - -static const struct btrfs_free_space_op pinned_free_ino_op = { - .recalc_thresholds = pinned_recalc_thresholds, - .use_bitmap = pinned_use_bitmap, -}; - -void btrfs_init_free_ino_ctl(struct btrfs_root *root) -{ - struct btrfs_free_space_ctl *ctl = root->free_ino_ctl; - struct btrfs_free_space_ctl *pinned = root->free_ino_pinned; - - spin_lock_init(&ctl->tree_lock); - ctl->unit = 1; - ctl->start = 0; - ctl->private = NULL; - ctl->op = &free_ino_op; - INIT_LIST_HEAD(&ctl->trimming_ranges); - mutex_init(&ctl->cache_writeout_mutex); - - /* - * Initially we allow to use 16K of ram to cache chunks of - * inode numbers before we resort to bitmaps. This is somewhat - * arbitrary, but it will be adjusted in runtime. - */ - ctl->extents_thresh = INIT_THRESHOLD; - - spin_lock_init(&pinned->tree_lock); - pinned->unit = 1; - pinned->start = 0; - pinned->private = NULL; - pinned->extents_thresh = 0; - pinned->op = &pinned_free_ino_op; -} - -int btrfs_save_ino_cache(struct btrfs_root *root, - struct btrfs_trans_handle *trans) -{ - struct btrfs_fs_info *fs_info = root->fs_info; - struct btrfs_free_space_ctl *ctl = root->free_ino_ctl; - struct btrfs_path *path; - struct inode *inode; - struct btrfs_block_rsv *rsv; - struct extent_changeset *data_reserved = NULL; - u64 num_bytes; - u64 alloc_hint = 0; - int ret; - int prealloc; - bool retry = false; - - /* only fs tree and subvol/snap needs ino cache */ - if (root->root_key.objectid != BTRFS_FS_TREE_OBJECTID && - (root->root_key.objectid < BTRFS_FIRST_FREE_OBJECTID || - root->root_key.objectid > BTRFS_LAST_FREE_OBJECTID)) - return 0; - - /* Don't save inode cache if we are deleting this root */ - if (btrfs_root_refs(&root->root_item) == 0) - return 0; - - if (!btrfs_test_opt(fs_info, INODE_MAP_CACHE)) - return 0; - - path = btrfs_alloc_path(); - if (!path) - return -ENOMEM; - - rsv = trans->block_rsv; - trans->block_rsv = &fs_info->trans_block_rsv; - - num_bytes = trans->bytes_reserved; - /* - * 1 item for inode item insertion if need - * 4 items for inode item update (in the worst case) - * 1 items for slack space if we need do truncation - * 1 item for free space object - * 3 items for pre-allocation - */ - trans->bytes_reserved = btrfs_calc_insert_metadata_size(fs_info, 10); - ret = btrfs_block_rsv_add(root, trans->block_rsv, - trans->bytes_reserved, - BTRFS_RESERVE_NO_FLUSH); - if (ret) - goto out; - trace_btrfs_space_reservation(fs_info, "ino_cache", trans->transid, - trans->bytes_reserved, 1); -again: - inode = lookup_free_ino_inode(root, path); - if (IS_ERR(inode) && (PTR_ERR(inode) != -ENOENT || retry)) { - ret = PTR_ERR(inode); - goto out_release; - } - - if (IS_ERR(inode)) { - BUG_ON(retry); /* Logic error */ - retry = true; - - ret = create_free_ino_inode(root, trans, path); - if (ret) - goto out_release; - goto again; - } - - BTRFS_I(inode)->generation = 0; - ret = btrfs_update_inode(trans, root, BTRFS_I(inode)); - if (ret) { - btrfs_abort_transaction(trans, ret); - goto out_put; - } - - if (i_size_read(inode) > 0) { - ret = btrfs_truncate_free_space_cache(trans, NULL, inode); - if (ret) { - if (ret != -ENOSPC) - btrfs_abort_transaction(trans, ret); - goto out_put; - } - } - - spin_lock(&root->ino_cache_lock); - if (root->ino_cache_state != BTRFS_CACHE_FINISHED) { - ret = -1; - spin_unlock(&root->ino_cache_lock); - goto out_put; - } - spin_unlock(&root->ino_cache_lock); - - spin_lock(&ctl->tree_lock); - prealloc = sizeof(struct btrfs_free_space) * ctl->free_extents; - prealloc = ALIGN(prealloc, PAGE_SIZE); - prealloc += ctl->total_bitmaps * PAGE_SIZE; - spin_unlock(&ctl->tree_lock); - - /* Just to make sure we have enough space */ - prealloc += 8 * PAGE_SIZE; - - ret = btrfs_delalloc_reserve_space(BTRFS_I(inode), &data_reserved, 0, - prealloc); - if (ret) - goto out_put; - - ret = btrfs_prealloc_file_range_trans(inode, trans, 0, 0, prealloc, - prealloc, prealloc, &alloc_hint); - if (ret) { - btrfs_delalloc_release_extents(BTRFS_I(inode), prealloc); - btrfs_delalloc_release_metadata(BTRFS_I(inode), prealloc, true); - goto out_put; - } - - ret = btrfs_write_out_ino_cache(root, trans, path, inode); - btrfs_delalloc_release_extents(BTRFS_I(inode), prealloc); -out_put: - iput(inode); -out_release: - trace_btrfs_space_reservation(fs_info, "ino_cache", trans->transid, - trans->bytes_reserved, 0); - btrfs_block_rsv_release(fs_info, trans->block_rsv, - trans->bytes_reserved, NULL); -out: - trans->block_rsv = rsv; - trans->bytes_reserved = num_bytes; - - btrfs_free_path(path); - extent_changeset_free(data_reserved); - return ret; -} diff --git a/fs/btrfs/inode-map.h b/fs/btrfs/inode-map.h deleted file mode 100644 index 629baf9aefb1..000000000000 --- a/fs/btrfs/inode-map.h +++ /dev/null @@ -1,13 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ - -#ifndef BTRFS_INODE_MAP_H -#define BTRFS_INODE_MAP_H - -void btrfs_init_free_ino_ctl(struct btrfs_root *root); -void btrfs_unpin_free_ino(struct btrfs_root *root); -void btrfs_return_ino(struct btrfs_root *root, u64 objectid); -int btrfs_find_free_ino(struct btrfs_root *root, u64 *objectid); -int btrfs_save_ino_cache(struct btrfs_root *root, - struct btrfs_trans_handle *trans); - -#endif diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index a2947a00d442..0ce42d52d53e 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -45,7 +45,6 @@ #include "compression.h" #include "locking.h" #include "free-space-cache.h" -#include "inode-map.h" #include "props.h" #include "qgroup.h" #include "delalloc-space.h" @@ -4214,12 +4213,6 @@ out_up_write: d_invalidate(dentry); btrfs_prune_dentries(dest); ASSERT(dest->send_in_progress == 0); - - /* the last ref */ - if (dest->ino_cache_inode) { - iput(dest->ino_cache_inode); - dest->ino_cache_inode = NULL; - } } return ret; @@ -5295,10 +5288,6 @@ void btrfs_evict_inode(struct inode *inode) btrfs_end_transaction(trans); } - if (!(root == fs_info->tree_root || - root->root_key.objectid == BTRFS_TREE_RELOC_OBJECTID)) - btrfs_return_ino(root, btrfs_ino(BTRFS_I(inode))); - free_rsv: btrfs_free_block_rsv(fs_info, rsv); no_delete: diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index 0b5e1df24906..703212ff50a5 100644 --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -34,7 +34,6 @@ #include "print-tree.h" #include "volumes.h" #include "locking.h" -#include "inode-map.h" #include "backref.h" #include "rcu-string.h" #include "send.h" diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c index 6e7e5fe2e277..19b7db8b2117 100644 --- a/fs/btrfs/relocation.c +++ b/fs/btrfs/relocation.c @@ -18,7 +18,6 @@ #include "btrfs_inode.h" #include "async-thread.h" #include "free-space-cache.h" -#include "inode-map.h" #include "qgroup.h" #include "print-tree.h" #include "delalloc-space.h" diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c index 7b2970c90ebe..455d924b8d62 100644 --- a/fs/btrfs/super.c +++ b/fs/btrfs/super.c @@ -338,7 +338,6 @@ enum { Opt_device, Opt_fatal_errors, Opt_flushoncommit, Opt_noflushoncommit, - Opt_inode_cache, Opt_noinode_cache, Opt_max_inline, Opt_barrier, Opt_nobarrier, Opt_datacow, Opt_nodatacow, @@ -371,6 +370,7 @@ enum { /* Deprecated options */ Opt_recovery, + Opt_inode_cache, Opt_noinode_cache, /* Debugging options */ Opt_check_integrity, @@ -880,14 +880,9 @@ int btrfs_parse_options(struct btrfs_fs_info *info, char *options, } break; case Opt_inode_cache: - btrfs_warn(info, - "the 'inode_cache' option is deprecated and will have no effect from 5.11"); - btrfs_set_pending_and_info(info, INODE_MAP_CACHE, - "enabling inode map caching"); - break; case Opt_noinode_cache: - btrfs_clear_pending_and_info(info, INODE_MAP_CACHE, - "disabling inode map caching"); + btrfs_warn(info, + "the 'inode_cache' option is deprecated and has no effect since 5.11"); break; case Opt_clear_cache: btrfs_set_and_info(info, CLEAR_CACHE, @@ -1506,8 +1501,6 @@ static int btrfs_show_options(struct seq_file *seq, struct dentry *dentry) seq_puts(seq, ",enospc_debug"); if (btrfs_test_opt(info, AUTO_DEFRAG)) seq_puts(seq, ",autodefrag"); - if (btrfs_test_opt(info, INODE_MAP_CACHE)) - seq_puts(seq, ",inode_cache"); if (btrfs_test_opt(info, SKIP_BALANCE)) seq_puts(seq, ",skip_balance"); #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c index 238e5a2c0696..6b7156712486 100644 --- a/fs/btrfs/transaction.c +++ b/fs/btrfs/transaction.c @@ -16,7 +16,6 @@ #include "transaction.h" #include "locking.h" #include "tree-log.h" -#include "inode-map.h" #include "volumes.h" #include "dev-replace.h" #include "qgroup.h" @@ -163,8 +162,6 @@ static noinline void switch_commit_roots(struct btrfs_trans_handle *trans) list_del_init(&root->dirty_list); free_extent_buffer(root->commit_root); root->commit_root = btrfs_root_node(root); - if (is_fstree(root->root_key.objectid)) - btrfs_unpin_free_ino(root); extent_io_tree_release(&root->dirty_log_pages); btrfs_qgroup_clean_swapped_blocks(root); } @@ -1342,8 +1339,6 @@ static noinline int commit_fs_roots(struct btrfs_trans_handle *trans) btrfs_free_log(trans, root); btrfs_update_reloc_root(trans, root); - btrfs_save_ino_cache(root, trans); - /* see comments in should_cow_block() */ clear_bit(BTRFS_ROOT_FORCE_COW, &root->state); smp_mb__after_atomic(); @@ -2436,10 +2431,6 @@ int btrfs_clean_one_deleted_snapshot(struct btrfs_root *root) btrfs_debug(fs_info, "cleaner removing %llu", root->root_key.objectid); btrfs_kill_all_delayed_nodes(root); - if (root->ino_cache_inode) { - iput(root->ino_cache_inode); - root->ino_cache_inode = NULL; - } if (btrfs_header_backref_rev(root->node) < BTRFS_MIXED_BACKREF_REV) @@ -2460,16 +2451,6 @@ void btrfs_apply_pending_changes(struct btrfs_fs_info *fs_info) if (!prev) return; - bit = 1 << BTRFS_PENDING_SET_INODE_MAP_CACHE; - if (prev & bit) - btrfs_set_opt(fs_info->mount_opt, INODE_MAP_CACHE); - prev &= ~bit; - - bit = 1 << BTRFS_PENDING_CLEAR_INODE_MAP_CACHE; - if (prev & bit) - btrfs_clear_opt(fs_info->mount_opt, INODE_MAP_CACHE); - prev &= ~bit; - bit = 1 << BTRFS_PENDING_COMMIT; if (prev & bit) btrfs_debug(fs_info, "pending commit done"); diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c index 80cf496226c2..485267ee5bc6 100644 --- a/fs/btrfs/tree-log.c +++ b/fs/btrfs/tree-log.c @@ -17,7 +17,6 @@ #include "backref.h" #include "compression.h" #include "qgroup.h" -#include "inode-map.h" #include "block-group.h" #include "space-info.h" -- cgit v1.2.3