forked from Minki/linux
eece6a9cf6
write_all_supers and write_ctree_super are almost equal, the parameter 'trans' is unused so we can drop it and have just one helper. Reviewed-by: Liu Bo <bo.li.liu@oracle.com> Signed-off-by: David Sterba <dsterba@suse.com>
163 lines
5.8 KiB
C
163 lines
5.8 KiB
C
/*
|
|
* 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__
|
|
|
|
#define BTRFS_SUPER_INFO_OFFSET SZ_64K
|
|
#define BTRFS_SUPER_INFO_SIZE 4096
|
|
|
|
#define BTRFS_SUPER_MIRROR_MAX 3
|
|
#define BTRFS_SUPER_MIRROR_SHIFT 12
|
|
|
|
enum btrfs_wq_endio_type {
|
|
BTRFS_WQ_ENDIO_DATA = 0,
|
|
BTRFS_WQ_ENDIO_METADATA = 1,
|
|
BTRFS_WQ_ENDIO_FREE_SPACE = 2,
|
|
BTRFS_WQ_ENDIO_RAID56 = 3,
|
|
BTRFS_WQ_ENDIO_DIO_REPAIR = 4,
|
|
};
|
|
|
|
static inline u64 btrfs_sb_offset(int mirror)
|
|
{
|
|
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_fs_info *fs_info,
|
|
u64 bytenr, u64 parent_transid);
|
|
void readahead_tree_block(struct btrfs_fs_info *fs_info, u64 bytenr);
|
|
int reada_tree_block_flagged(struct btrfs_fs_info *fs_info, u64 bytenr,
|
|
int mirror_num, struct extent_buffer **eb);
|
|
struct extent_buffer *btrfs_find_create_tree_block(
|
|
struct btrfs_fs_info *fs_info,
|
|
u64 bytenr);
|
|
void clean_tree_block(struct btrfs_fs_info *fs_info, struct extent_buffer *buf);
|
|
int open_ctree(struct super_block *sb,
|
|
struct btrfs_fs_devices *fs_devices,
|
|
char *options);
|
|
void close_ctree(struct btrfs_fs_info *fs_info);
|
|
int write_all_supers(struct btrfs_fs_info *fs_info, int max_mirrors);
|
|
struct buffer_head *btrfs_read_dev_super(struct block_device *bdev);
|
|
int btrfs_read_dev_one_super(struct block_device *bdev, int copy_num,
|
|
struct buffer_head **bh_ret);
|
|
int btrfs_commit_super(struct btrfs_fs_info *fs_info);
|
|
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);
|
|
struct btrfs_root *btrfs_lookup_fs_root(struct btrfs_fs_info *fs_info,
|
|
u64 root_id);
|
|
int btrfs_insert_fs_root(struct btrfs_fs_info *fs_info,
|
|
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,
|
|
struct btrfs_key *key,
|
|
bool check_ref);
|
|
static inline struct btrfs_root *
|
|
btrfs_read_fs_root_no_name(struct btrfs_fs_info *fs_info,
|
|
struct btrfs_key *location)
|
|
{
|
|
return btrfs_get_fs_root(fs_info, location, true);
|
|
}
|
|
|
|
int btrfs_cleanup_fs_roots(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);
|
|
|
|
#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)
|
|
{
|
|
if (atomic_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_mark_buffer_dirty(struct extent_buffer *buf);
|
|
int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid,
|
|
int atomic);
|
|
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, u8 *result);
|
|
int btrfs_bio_wq_end_io(struct btrfs_fs_info *info, struct bio *bio,
|
|
enum btrfs_wq_endio_type metadata);
|
|
int btrfs_wq_submit_bio(struct btrfs_fs_info *fs_info, struct inode *inode,
|
|
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 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_dirty_bgs(struct btrfs_transaction *trans,
|
|
struct btrfs_fs_info *fs_info);
|
|
void btrfs_cleanup_one_transaction(struct btrfs_transaction *trans,
|
|
struct btrfs_fs_info *fs_info);
|
|
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_get_num_tolerated_disk_barrier_failures(u64 flags);
|
|
int btrfs_calc_num_tolerated_disk_barrier_failures(
|
|
struct btrfs_fs_info *fs_info);
|
|
int __init btrfs_end_io_wq_init(void);
|
|
void btrfs_end_io_wq_exit(void);
|
|
|
|
#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
|