* Boston, MA 021110-1307, USA.
*/
-#ifndef __DISKIO__
-#define __DISKIO__
+#ifndef __BTRFS_DISK_IO_H__
+#define __BTRFS_DISK_IO_H__
+
+#include "kerncompat.h"
+#include "ctree.h"
#define BTRFS_SUPER_INFO_OFFSET (64 * 1024)
#define BTRFS_SUPER_INFO_SIZE 4096
#define BTRFS_SUPER_MIRROR_MAX 3
#define BTRFS_SUPER_MIRROR_SHIFT 12
+enum btrfs_open_ctree_flags {
+ OPEN_CTREE_WRITES = (1 << 0),
+ OPEN_CTREE_PARTIAL = (1 << 1),
+ OPEN_CTREE_BACKUP_ROOT = (1 << 2),
+ OPEN_CTREE_RECOVER_SUPER = (1 << 3),
+ OPEN_CTREE_RESTORE = (1 << 4),
+ OPEN_CTREE_NO_BLOCK_GROUPS = (1 << 5),
+ OPEN_CTREE_EXCLUSIVE = (1 << 6),
+ OPEN_CTREE_NO_DEVICES = (1 << 7),
+ /*
+ * Don't print error messages if bytenr or checksums do not match in
+ * tree block headers. Turn on by OPEN_CTREE_SUPPRESS_ERROR
+ */
+ OPEN_CTREE_SUPPRESS_CHECK_BLOCK_ERRORS = (1 << 8),
+ /* Return chunk root */
+ __OPEN_CTREE_RETURN_CHUNK_ROOT = (1 << 9),
+ OPEN_CTREE_CHUNK_ROOT_ONLY = OPEN_CTREE_PARTIAL +
+ OPEN_CTREE_SUPPRESS_CHECK_BLOCK_ERRORS +
+ __OPEN_CTREE_RETURN_CHUNK_ROOT,
+ /*
+ * TODO: cleanup: Split the open_ctree_flags into more independent
+ * Tree bits.
+ * Like split PARTIAL into SKIP_CSUM/SKIP_EXTENT
+ */
+
+ OPEN_CTREE_IGNORE_FSID_MISMATCH = (1 << 10),
+
+ /*
+ * Allow open_ctree_fs_info() to return a incomplete fs_info with
+ * system chunks from super block only.
+ * It's useful for chunk corruption case.
+ * Makes no sense for open_ctree variants returning btrfs_root.
+ */
+ OPEN_CTREE_IGNORE_CHUNK_TREE_ERROR = (1 << 11)
+};
+
static inline u64 btrfs_sb_offset(int mirror)
{
u64 start = 16 * 1024;
struct btrfs_device;
int read_whole_eb(struct btrfs_fs_info *info, struct extent_buffer *eb, int mirror);
-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);
+struct extent_buffer* read_tree_block_fs_info(
+ 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,
+ u64 *len, int mirror);
+void readahead_tree_block(struct btrfs_root *root, 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);
int __setup_root(u32 nodesize, u32 leafsize, u32 sectorsize,
u32 stripesize, struct btrfs_root *root,
void btrfs_free_fs_info(struct btrfs_fs_info *fs_info);
struct btrfs_fs_info *btrfs_new_fs_info(int writable, u64 sb_bytenr);
int btrfs_check_fs_compatibility(struct btrfs_super_block *sb, int writable);
-int btrfs_setup_all_roots(struct btrfs_fs_info *fs_info,
- u64 root_tree_bytenr, int partial, int backup_root);
+int btrfs_setup_all_roots(struct btrfs_fs_info *fs_info, u64 root_tree_bytenr,
+ enum btrfs_open_ctree_flags flags);
void btrfs_release_all_roots(struct btrfs_fs_info *fs_info);
void btrfs_cleanup_all_caches(struct btrfs_fs_info *fs_info);
int btrfs_scan_fs_devices(int fd, const char *path,
struct btrfs_fs_devices **fs_devices, u64 sb_bytenr,
- int run_ioctl);
-int btrfs_setup_chunk_tree_and_device_map(struct btrfs_fs_info *fs_info);
+ int super_recover, int skip_devices);
+int btrfs_setup_chunk_tree_and_device_map(struct btrfs_fs_info *fs_info,
+ u64 chunk_root_bytenr);
-struct btrfs_root *open_ctree(const char *filename, u64 sb_bytenr, int writes);
+struct btrfs_root *open_ctree(const char *filename, u64 sb_bytenr,
+ enum btrfs_open_ctree_flags flags);
struct btrfs_root *open_ctree_fd(int fp, const char *path, u64 sb_bytenr,
- int writes);
-struct btrfs_fs_info *open_ctree_fs_info_restore(const char *filename,
- u64 sb_bytenr, u64 root_tree_bytenr,
- int writes, int partial);
+ enum btrfs_open_ctree_flags flags);
struct btrfs_fs_info *open_ctree_fs_info(const char *filename,
u64 sb_bytenr, u64 root_tree_bytenr,
- int writes, int partial,
- int backup_root);
-struct btrfs_root *open_ctree_with_broken_super(const char *filename,
- u64 sb_bytenr, int writes);
-int close_ctree(struct btrfs_root *root);
+ u64 chunk_root_bytenr,
+ enum btrfs_open_ctree_flags flags);
+int close_ctree_fs_info(struct btrfs_fs_info *fs_info);
+static inline int close_ctree(struct btrfs_root *root)
+{
+ BUG_ON(!root);
+ return close_ctree_fs_info(root->fs_info);
+}
+
int write_all_supers(struct btrfs_root *root);
int write_ctree_super(struct btrfs_trans_handle *trans,
struct btrfs_root *root);
-int btrfs_read_dev_super(int fd, struct btrfs_super_block *sb, u64 sb_bytenr);
+int btrfs_read_dev_super(int fd, struct btrfs_super_block *sb, u64 sb_bytenr,
+ int super_recover);
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,
int verify);
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 extent_buffer *eb);
-#endif
/* raid6.c */
void raid6_gen_syndrome(int disks, size_t bytes, void **ptrs);
+
+#endif
projects / platform / upstream / btrfs-progs.git / blobdiff