X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=fs%2Fbtrfs%2Fdisk-io.h;h=95029db227be5767d17eeab2a11cb36b63709849;hb=819a8f539acf7838d62fec20e88401ff53303cd1;hp=5261733b8735388173b8f61090c1bd56f9c8799c;hpb=a52d9a8033c454cd9b4697cfafb467509fc1693f;p=safe%2Fjmp%2Flinux-2.6 diff --git a/fs/btrfs/disk-io.h b/fs/btrfs/disk-io.h index 5261733..95029db 100644 --- a/fs/btrfs/disk-io.h +++ b/fs/btrfs/disk-io.h @@ -19,65 +19,96 @@ #ifndef __DISKIO__ #define __DISKIO__ -#include +#define BTRFS_SUPER_INFO_OFFSET (64 * 1024) +#define BTRFS_SUPER_INFO_SIZE 4096 -#define BTRFS_SUPER_INFO_OFFSET (16 * 1024) +#define BTRFS_SUPER_MIRROR_MAX 3 +#define BTRFS_SUPER_MIRROR_SHIFT 12 -enum btrfs_bh_state_bits { - BH_Checked = BH_PrivateStart, - BH_Defrag, -}; -BUFFER_FNS(Checked, checked); -BUFFER_FNS(Defrag, defrag); - -static inline struct btrfs_node *btrfs_buffer_node(struct buffer_head *bh) -{ - return (struct btrfs_node *)bh->b_data; -} - -static inline struct btrfs_leaf *btrfs_buffer_leaf(struct buffer_head *bh) +static inline u64 btrfs_sb_offset(int mirror) { - return (struct btrfs_leaf *)bh->b_data; + u64 start = 16 * 1024; + if (mirror) + return start << (BTRFS_SUPER_MIRROR_SHIFT * mirror); + return BTRFS_SUPER_INFO_OFFSET; } -static inline struct btrfs_header *btrfs_buffer_header(struct buffer_head *bh) -{ - return &((struct btrfs_node *)bh->b_data)->header; -} +struct btrfs_device; +struct btrfs_fs_devices; -struct buffer_head *read_tree_block(struct btrfs_root *root, u64 blocknr); -int readahead_tree_block(struct btrfs_root *root, u64 blocknr); -struct buffer_head *btrfs_find_create_tree_block(struct btrfs_root *root, - u64 blocknr); -int write_tree_block(struct btrfs_trans_handle *trans, struct btrfs_root *root, - struct buffer_head *buf); -int dirty_tree_block(struct btrfs_trans_handle *trans, struct btrfs_root *root, - struct buffer_head *buf); +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); +struct extent_buffer *btrfs_find_create_tree_block(struct btrfs_root *root, + u64 bytenr, u32 blocksize); int clean_tree_block(struct btrfs_trans_handle *trans, - struct btrfs_root *root, struct buffer_head *buf); -int btrfs_commit_transaction(struct btrfs_trans_handle *trans, - struct btrfs_root *root); -struct btrfs_root *open_ctree(struct super_block *sb); + struct btrfs_root *root, struct extent_buffer *buf); +struct btrfs_root *open_ctree(struct super_block *sb, + struct btrfs_fs_devices *fs_devices, + char *options); int close_ctree(struct btrfs_root *root); -void btrfs_block_release(struct btrfs_root *root, struct buffer_head *buf); int write_ctree_super(struct btrfs_trans_handle *trans, - struct btrfs_root *root); -struct buffer_head *btrfs_find_tree_block(struct btrfs_root *root, u64 blocknr); -int btrfs_csum_data(struct btrfs_root * root, char *data, size_t len, - char *result); + 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_lookup_fs_root(struct btrfs_fs_info *fs_info, + u64 root_objectid); struct btrfs_root *btrfs_read_fs_root(struct btrfs_fs_info *fs_info, - struct btrfs_key *location); -struct btrfs_root *btrfs_read_fs_root_no_radix(struct btrfs_fs_info *fs_info, + struct btrfs_key *location, + const char *name, int namelen); +struct btrfs_root *btrfs_read_fs_root_no_radix(struct btrfs_root *tree_root, struct btrfs_key *location); -u64 bh_blocknr(struct buffer_head *bh); +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); int btrfs_insert_dev_radix(struct btrfs_root *root, struct block_device *bdev, u64 device_id, u64 block_start, u64 num_blocks); -int btrfs_map_bh_to_logical(struct btrfs_root *root, struct buffer_head *bh, - u64 logical); -void btrfs_btree_balance_dirty(struct btrfs_root *root); +void btrfs_btree_balance_dirty(struct btrfs_root *root, unsigned long nr); int btrfs_free_fs_root(struct btrfs_fs_info *fs_info, struct btrfs_root *root); -void btrfs_mark_buffer_dirty(struct buffer_head *bh); +void btrfs_mark_buffer_dirty(struct extent_buffer *buf); +int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid); +int btrfs_set_buffer_uptodate(struct extent_buffer *buf); +int wait_on_tree_block_writeback(struct btrfs_root *root, + struct extent_buffer *buf); +int btrfs_read_buffer(struct extent_buffer *buf, u64 parent_transid); +u32 btrfs_csum_data(struct btrfs_root *root, char *data, u32 seed, size_t len); +void btrfs_csum_final(u32 crc, char *result); +int btrfs_open_device(struct btrfs_device *dev); +int btrfs_verify_block_csum(struct btrfs_root *root, + struct extent_buffer *buf); +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, + extent_submit_bio_hook_t *submit_bio_start, + extent_submit_bio_hook_t *submit_bio_done); + +int btrfs_congested_async(struct btrfs_fs_info *info, int iodone); +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_free_log_root_tree(struct btrfs_trans_handle *trans, + struct btrfs_fs_info *fs_info); +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); +int btree_lock_page_hook(struct page *page); + + +#ifdef CONFIG_DEBUG_LOCK_ALLOC +void btrfs_set_buffer_lockdep_class(struct extent_buffer *eb, int level); +#else +static inline void btrfs_set_buffer_lockdep_class(struct extent_buffer *eb, + int level) +{ +} +#endif #endif