* [PATCH 3/3] btrfs: Remove inode cache feature
2020-11-26 13:10 [PATCH 0/3] Remove deprecated inode cache feature Nikolay Borisov
2020-11-26 13:10 ` [PATCH 1/3] btrfs: Move btrfs_find_highest_objectid/btrfs_find_free_objectid to disk-io.c Nikolay Borisov
2020-11-26 13:10 ` [PATCH 2/3] btrfs: Replace calls to btrfs_find_free_ino with btrfs_find_free_objectid Nikolay Borisov
@ 2020-11-26 13:10 ` Nikolay Borisov
2020-11-27 16:30 ` David Sterba
2020-11-26 15:31 ` [PATCH 0/3] Remove deprecated " David Sterba
3 siblings, 1 reply; 8+ messages in thread
From: Nikolay Borisov @ 2020-11-26 13:10 UTC (permalink / raw)
To: linux-btrfs; +Cc: Nikolay Borisov
It's been deprecated and never really used so simply remove it.
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
---
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 | 6 -
fs/btrfs/inode-map.c | 527 ------------------------------------
fs/btrfs/inode-map.h | 14 -
fs/btrfs/inode.c | 11 -
fs/btrfs/ioctl.c | 1 -
fs/btrfs/relocation.c | 1 -
fs/btrfs/super.c | 8 -
fs/btrfs/transaction.c | 19 --
fs/btrfs/tree-log.c | 1 -
13 files changed, 3 insertions(+), 802 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 e738f6206ea5..b8290e0f62e2 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 9a186b2433ac..5e2eeadedbe5 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -1066,15 +1066,6 @@ 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];
@@ -1348,7 +1339,7 @@ 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)
@@ -1395,9 +1386,7 @@ 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 f97ed0dc179d..6d8cd9fef1ea 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"
@@ -1335,14 +1334,6 @@ 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
@@ -1359,10 +1350,6 @@ 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
@@ -2032,8 +2019,6 @@ 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);
@@ -3950,14 +3935,6 @@ 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 @@ static int __btrfs_wait_cache_io(struct btrfs_root *root,
}
-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..50d6ce1b25eb 100644
--- a/fs/btrfs/free-space-cache.h
+++ b/fs/btrfs/free-space-cache.h
@@ -99,11 +99,6 @@ int btrfs_write_out_cache(struct btrfs_trans_handle *trans,
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,
@@ -127,7 +122,6 @@ 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 <linux/kthread.h>
-#include <linux/pagemap.h>
-
-#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 5f6d8b3c65c2..000000000000
--- a/fs/btrfs/inode-map.h
+++ /dev/null
@@ -1,14 +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 70d964170497..4426795b0b2f 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"
@@ -4199,12 +4198,6 @@ int btrfs_delete_subvolume(struct inode *dir, struct dentry *dentry)
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;
@@ -5280,10 +5273,6 @@ 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 6aea52828742..e3859662cfcf 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 348f8899f4f4..99e4f6ddec1a 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -874,12 +874,6 @@ int btrfs_parse_options(struct btrfs_fs_info *info, char *options,
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");
break;
case Opt_clear_cache:
btrfs_set_and_info(info, CLEAR_CACHE,
@@ -1496,8 +1490,6 @@ 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 e425451c5811..7c32ef22dc5a 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();
@@ -2435,10 +2430,6 @@ 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)
@@ -2459,16 +2450,6 @@ 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"
--
2.25.1
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