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-rw-r--r--fs/btrfs/disk-io.h193
1 files changed, 90 insertions, 103 deletions
diff --git a/fs/btrfs/disk-io.h b/fs/btrfs/disk-io.h
index b71acd6e1e5b..5320da83d0cf 100644
--- a/fs/btrfs/disk-io.h
+++ b/fs/btrfs/disk-io.h
@@ -1,143 +1,130 @@
+/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (C) 2007 Oracle. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License v2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
*/
-#ifndef __DISKIO__
-#define __DISKIO__
+#ifndef BTRFS_DISK_IO_H
+#define BTRFS_DISK_IO_H
-#define BTRFS_SUPER_INFO_OFFSET (64 * 1024)
-#define BTRFS_SUPER_INFO_SIZE 4096
+#include <linux/sizes.h>
+#include <linux/compiler_types.h>
+#include "ctree.h"
+#include "bio.h"
+#include "ordered-data.h"
+
+struct block_device;
+struct super_block;
+struct extent_buffer;
+struct btrfs_device;
+struct btrfs_fs_devices;
+struct btrfs_fs_info;
+struct btrfs_super_block;
+struct btrfs_trans_handle;
+struct btrfs_tree_parent_check;
+struct btrfs_transaction;
#define BTRFS_SUPER_MIRROR_MAX 3
#define BTRFS_SUPER_MIRROR_SHIFT 12
-enum {
- BTRFS_WQ_ENDIO_DATA = 0,
- BTRFS_WQ_ENDIO_METADATA = 1,
- BTRFS_WQ_ENDIO_FREE_SPACE = 2,
- BTRFS_WQ_ENDIO_RAID56 = 3,
-};
+/*
+ * Fixed blocksize for all devices, applies to specific ways of reading
+ * metadata like superblock. Must meet the set_blocksize requirements.
+ *
+ * Do not change.
+ */
+#define BTRFS_BDEV_BLOCKSIZE (4096)
static inline u64 btrfs_sb_offset(int mirror)
{
- u64 start = 16 * 1024;
+ u64 start = SZ_16K;
if (mirror)
return start << (BTRFS_SUPER_MIRROR_SHIFT * mirror);
return BTRFS_SUPER_INFO_OFFSET;
}
-struct btrfs_device;
-struct btrfs_fs_devices;
-
-struct extent_buffer *read_tree_block(struct btrfs_root *root, u64 bytenr,
- u32 blocksize, u64 parent_transid);
-int readahead_tree_block(struct btrfs_root *root, u64 bytenr, u32 blocksize,
- u64 parent_transid);
-int reada_tree_block_flagged(struct btrfs_root *root, u64 bytenr, u32 blocksize,
- int mirror_num, struct extent_buffer **eb);
-struct extent_buffer *btrfs_find_create_tree_block(struct btrfs_root *root,
- u64 bytenr, u32 blocksize);
-void clean_tree_block(struct btrfs_trans_handle *trans,
- struct btrfs_root *root, struct extent_buffer *buf);
-int open_ctree(struct super_block *sb,
- struct btrfs_fs_devices *fs_devices,
- char *options);
-int close_ctree(struct btrfs_root *root);
-int write_ctree_super(struct btrfs_trans_handle *trans,
- struct btrfs_root *root, int max_mirrors);
-struct buffer_head *btrfs_read_dev_super(struct block_device *bdev);
-int btrfs_commit_super(struct btrfs_root *root);
-struct extent_buffer *btrfs_find_tree_block(struct btrfs_root *root,
- u64 bytenr, u32 blocksize);
-struct btrfs_root *btrfs_read_fs_root(struct btrfs_root *tree_root,
- struct btrfs_key *location);
-int btrfs_init_fs_root(struct btrfs_root *root);
+void btrfs_check_leaked_roots(const struct btrfs_fs_info *fs_info);
+void btrfs_init_fs_info(struct btrfs_fs_info *fs_info);
+struct extent_buffer *read_tree_block(struct btrfs_fs_info *fs_info, u64 bytenr,
+ struct btrfs_tree_parent_check *check);
+struct extent_buffer *btrfs_find_create_tree_block(
+ struct btrfs_fs_info *fs_info,
+ u64 bytenr, u64 owner_root,
+ int level);
+int btrfs_start_pre_rw_mount(struct btrfs_fs_info *fs_info);
+int btrfs_check_super_csum(struct btrfs_fs_info *fs_info,
+ const struct btrfs_super_block *disk_sb);
+int __cold open_ctree(struct super_block *sb, struct btrfs_fs_devices *fs_devices);
+void __cold close_ctree(struct btrfs_fs_info *fs_info);
+int btrfs_validate_super(const struct btrfs_fs_info *fs_info,
+ const struct btrfs_super_block *sb, int mirror_num);
+int btrfs_check_features(struct btrfs_fs_info *fs_info, bool is_rw_mount);
+int write_all_supers(struct btrfs_fs_info *fs_info, int max_mirrors);
+int btrfs_commit_super(struct btrfs_fs_info *fs_info);
+struct btrfs_root *btrfs_read_tree_root(struct btrfs_root *tree_root,
+ const struct btrfs_key *key);
int btrfs_insert_fs_root(struct btrfs_fs_info *fs_info,
struct btrfs_root *root);
-struct btrfs_root *btrfs_read_fs_root_no_name(struct btrfs_fs_info *fs_info,
- struct btrfs_key *location);
-int btrfs_cleanup_fs_roots(struct btrfs_fs_info *fs_info);
-void btrfs_btree_balance_dirty(struct btrfs_root *root);
-void btrfs_btree_balance_dirty_nodelay(struct btrfs_root *root);
+void btrfs_free_fs_roots(struct btrfs_fs_info *fs_info);
+
+struct btrfs_root *btrfs_get_fs_root(struct btrfs_fs_info *fs_info,
+ u64 objectid, bool check_ref);
+struct btrfs_root *btrfs_get_new_fs_root(struct btrfs_fs_info *fs_info,
+ u64 objectid, dev_t *anon_dev);
+struct btrfs_root *btrfs_get_fs_root_commit_root(struct btrfs_fs_info *fs_info,
+ struct btrfs_path *path,
+ u64 objectid);
+int btrfs_global_root_insert(struct btrfs_root *root);
+void btrfs_global_root_delete(struct btrfs_root *root);
+struct btrfs_root *btrfs_global_root(struct btrfs_fs_info *fs_info,
+ struct btrfs_key *key);
+struct btrfs_root *btrfs_csum_root(struct btrfs_fs_info *fs_info, u64 bytenr);
+struct btrfs_root *btrfs_extent_root(struct btrfs_fs_info *fs_info, u64 bytenr);
+
+void btrfs_free_fs_info(struct btrfs_fs_info *fs_info);
+void btrfs_btree_balance_dirty(struct btrfs_fs_info *fs_info);
+void btrfs_btree_balance_dirty_nodelay(struct btrfs_fs_info *fs_info);
void btrfs_drop_and_free_fs_root(struct btrfs_fs_info *fs_info,
struct btrfs_root *root);
-void btrfs_free_fs_root(struct btrfs_root *root);
+int btrfs_validate_extent_buffer(struct extent_buffer *eb,
+ const struct btrfs_tree_parent_check *check);
+#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
+struct btrfs_root *btrfs_alloc_dummy_root(struct btrfs_fs_info *fs_info);
+#endif
/*
* This function is used to grab the root, and avoid it is freed when we
* access it. But it doesn't ensure that the tree is not dropped.
- *
- * If you want to ensure the whole tree is safe, you should use
- * fs_info->subvol_srcu
*/
-static inline struct btrfs_root *btrfs_grab_fs_root(struct btrfs_root *root)
+static inline struct btrfs_root *btrfs_grab_root(struct btrfs_root *root)
{
- if (atomic_inc_not_zero(&root->refs))
+ if (!root)
+ return NULL;
+ if (refcount_inc_not_zero(&root->refs))
return root;
return NULL;
}
-static inline void btrfs_put_fs_root(struct btrfs_root *root)
-{
- if (atomic_dec_and_test(&root->refs))
- kfree(root);
-}
+void btrfs_put_root(struct btrfs_root *root);
+void btrfs_mark_buffer_dirty(struct btrfs_trans_handle *trans,
+ struct extent_buffer *buf);
+int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid, bool atomic);
+int btrfs_read_extent_buffer(struct extent_buffer *buf,
+ const struct btrfs_tree_parent_check *check);
-void btrfs_mark_buffer_dirty(struct extent_buffer *buf);
-int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid,
- int atomic);
-int btrfs_set_buffer_uptodate(struct extent_buffer *buf);
-int btrfs_read_buffer(struct extent_buffer *buf, u64 parent_transid);
-u32 btrfs_csum_data(char *data, u32 seed, size_t len);
-void btrfs_csum_final(u32 crc, char *result);
-int btrfs_bio_wq_end_io(struct btrfs_fs_info *info, struct bio *bio,
- int metadata);
-int btrfs_wq_submit_bio(struct btrfs_fs_info *fs_info, struct inode *inode,
- int rw, struct bio *bio, int mirror_num,
- unsigned long bio_flags, u64 bio_offset,
- extent_submit_bio_hook_t *submit_bio_start,
- extent_submit_bio_hook_t *submit_bio_done);
-unsigned long btrfs_async_submit_limit(struct btrfs_fs_info *info);
-int btrfs_write_tree_block(struct extent_buffer *buf);
-int btrfs_wait_tree_block_writeback(struct extent_buffer *buf);
+int btree_csum_one_bio(struct btrfs_bio *bbio);
+int btrfs_alloc_log_tree_node(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root);
int btrfs_init_log_root_tree(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info);
int btrfs_add_log_tree(struct btrfs_trans_handle *trans,
struct btrfs_root *root);
-void btrfs_cleanup_one_transaction(struct btrfs_transaction *trans,
- struct btrfs_root *root);
+void btrfs_cleanup_dirty_bgs(struct btrfs_transaction *trans,
+ struct btrfs_fs_info *fs_info);
+void btrfs_cleanup_one_transaction(struct btrfs_transaction *trans);
struct btrfs_root *btrfs_create_tree(struct btrfs_trans_handle *trans,
- struct btrfs_fs_info *fs_info,
u64 objectid);
-int btree_lock_page_hook(struct page *page, void *data,
- void (*flush_fn)(void *));
-int btrfs_calc_num_tolerated_disk_barrier_failures(
- struct btrfs_fs_info *fs_info);
+int btrfs_get_num_tolerated_disk_barrier_failures(u64 flags);
+int btrfs_get_free_objectid(struct btrfs_root *root, u64 *objectid);
+int btrfs_init_root_free_objectid(struct btrfs_root *root);
-#ifdef CONFIG_DEBUG_LOCK_ALLOC
-void btrfs_init_lockdep(void);
-void btrfs_set_buffer_lockdep_class(u64 objectid,
- struct extent_buffer *eb, int level);
-#else
-static inline void btrfs_init_lockdep(void)
-{ }
-static inline void btrfs_set_buffer_lockdep_class(u64 objectid,
- struct extent_buffer *eb, int level)
-{
-}
-#endif
#endif
generated by cgit (git 2.34.1) at 2025-12-21 21:15:38 +0000