diff options
Diffstat (limited to 'disk-io.h')
| -rw-r--r-- | disk-io.h | 52 |
1 files changed, 22 insertions, 30 deletions
@@ -21,8 +21,9 @@ #include "kerncompat.h" #include "ctree.h" +#include "sizes.h" -#define BTRFS_SUPER_INFO_OFFSET (64 * 1024) +#define BTRFS_SUPER_INFO_OFFSET SZ_64K #define BTRFS_SUPER_INFO_SIZE 4096 #define BTRFS_SUPER_MIRROR_MAX 3 @@ -97,38 +98,36 @@ enum btrfs_read_sb_flags { SBREAD_PARTIAL = (1 << 1), }; +/* + * Use macro to define mirror super block position, + * so we can use it in static array initialization + */ +#define BTRFS_SB_MIRROR_OFFSET(mirror) ((u64)(SZ_16K) << \ + (BTRFS_SUPER_MIRROR_SHIFT * (mirror))) + static inline u64 btrfs_sb_offset(int mirror) { - u64 start = 16 * 1024; if (mirror) - return start << (BTRFS_SUPER_MIRROR_SHIFT * mirror); + return BTRFS_SB_MIRROR_OFFSET(mirror); return BTRFS_SUPER_INFO_OFFSET; } struct btrfs_device; int read_whole_eb(struct btrfs_fs_info *info, struct extent_buffer *eb, int mirror); -struct extent_buffer* read_tree_block_fs_info( +struct extent_buffer* read_tree_block( struct btrfs_fs_info *fs_info, u64 bytenr, u32 blocksize, u64 parent_transid); -static inline struct extent_buffer* read_tree_block( - struct btrfs_root *root, u64 bytenr, u32 blocksize, - u64 parent_transid) -{ - return read_tree_block_fs_info(root->fs_info, bytenr, blocksize, - parent_transid); -} -int read_extent_data(struct btrfs_root *root, char *data, u64 logical, +int read_extent_data(struct btrfs_fs_info *fs_info, char *data, u64 logical, u64 *len, int mirror); -void readahead_tree_block(struct btrfs_root *root, u64 bytenr, u32 blocksize, - u64 parent_transid); +void readahead_tree_block(struct btrfs_fs_info *fs_info, u64 bytenr, + u32 blocksize, u64 parent_transid); struct extent_buffer* btrfs_find_create_tree_block( struct btrfs_fs_info *fs_info, u64 bytenr, u32 blocksize); -void btrfs_setup_root(u32 nodesize, u32 leafsize, u32 sectorsize, - u32 stripesize, struct btrfs_root *root, - struct btrfs_fs_info *fs_info, u64 objectid); +void btrfs_setup_root(struct btrfs_root *root, struct btrfs_fs_info *fs_info, + u64 objectid); int clean_tree_block(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct extent_buffer *buf); @@ -162,14 +161,14 @@ static inline int close_ctree(struct btrfs_root *root) return close_ctree_fs_info(root->fs_info); } -int write_all_supers(struct btrfs_root *root); +int write_all_supers(struct btrfs_fs_info *fs_info); int write_ctree_super(struct btrfs_trans_handle *trans, - struct btrfs_root *root); + struct btrfs_fs_info *fs_info); int btrfs_read_dev_super(int fd, struct btrfs_super_block *sb, u64 sb_bytenr, unsigned sbflags); int btrfs_map_bh_to_logical(struct btrfs_root *root, struct extent_buffer *bh, u64 logical); -struct extent_buffer *btrfs_find_tree_block(struct btrfs_root *root, +struct extent_buffer *btrfs_find_tree_block(struct btrfs_fs_info *fs_info, u64 bytenr, u32 blocksize); struct btrfs_root *btrfs_read_fs_root(struct btrfs_fs_info *fs_info, struct btrfs_key *location); @@ -179,9 +178,7 @@ int btrfs_free_fs_root(struct btrfs_root *root); 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); -u32 btrfs_csum_data(struct btrfs_root *root, char *data, u32 seed, size_t len); +u32 btrfs_csum_data(char *data, u32 seed, size_t len); void btrfs_csum_final(u32 crc, u8 *result); int btrfs_commit_transaction(struct btrfs_trans_handle *trans, @@ -192,13 +189,8 @@ int csum_tree_block_size(struct extent_buffer *buf, u16 csum_sectorsize, int verify_tree_block_csum_silent(struct extent_buffer *buf, u16 csum_size); int btrfs_read_buffer(struct extent_buffer *buf, u64 parent_transid); int write_tree_block(struct btrfs_trans_handle *trans, - struct btrfs_root *root, - struct extent_buffer *eb); -int write_and_map_eb(struct btrfs_trans_handle *trans, struct btrfs_root *root, + struct btrfs_fs_info *fs_info, struct extent_buffer *eb); - -/* raid56.c */ -void raid6_gen_syndrome(int disks, size_t bytes, void **ptrs); -int raid5_gen_result(int nr_devs, size_t stripe_len, int dest, void **data); +int write_and_map_eb(struct btrfs_fs_info *fs_info, struct extent_buffer *eb); #endif |