btrfs-progs: enclose uuid tree compat code with ifdefs

[platform/upstream/btrfs-progs.git] / disk-io.h

diff --git a/disk-io.h b/disk-io.h
index bd8ca63..941a3da 100644 (file)
--- a/disk-io.h
+++ b/disk-io.h
@@ -19,32 +19,81 @@
 #ifndef __DISKIO__
 #define __DISKIO__
 
-#define BTRFS_SUPER_INFO_OFFSET (16 * 1024)
+#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,
+       OPEN_CTREE_PARTIAL              = 2,
+       OPEN_CTREE_BACKUP_ROOT          = 4,
+       OPEN_CTREE_RECOVER_SUPER        = 8,
+       OPEN_CTREE_RESTORE              = 16,
+       OPEN_CTREE_NO_BLOCK_GROUPS      = 32,
+       OPEN_CTREE_EXCLUSIVE            = 64,
+};
+
+static inline u64 btrfs_sb_offset(int mirror)
+{
+       u64 start = 16 * 1024;
+       if (mirror)
+               return start << (BTRFS_SUPER_MIRROR_SHIFT * 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(struct btrfs_root *root, u64 bytenr,
-                                     u32 blocksize);
-int readahead_tree_block(struct btrfs_root *root, u64 bytenr, u32 blocksize);
+                                     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 __setup_root(u32 nodesize, u32 leafsize, u32 sectorsize,
+                        u32 stripesize, 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);
-struct btrfs_root *open_ctree(const char *filename, u64 sb_bytenr);
-struct btrfs_root *open_ctree_fd(int fp, const char *path, u64 sb_bytenr);
+
+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,
+                         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);
+
+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,
+                                enum btrfs_open_ctree_flags flags);
+struct btrfs_fs_info *open_ctree_fs_info(const char *filename,
+                                        u64 sb_bytenr, u64 root_tree_bytenr,
+                                        enum btrfs_open_ctree_flags flags);
 int close_ctree(struct btrfs_root *root);
+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_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,
                                            u64 bytenr, u32 blocksize);
 struct btrfs_root *btrfs_read_fs_root(struct btrfs_fs_info *fs_info,
                                      struct btrfs_key *location);
-int btrfs_free_fs_root(struct btrfs_fs_info *fs_info, struct btrfs_root *root);
+struct btrfs_root *btrfs_read_fs_root_no_cache(struct btrfs_fs_info *fs_info,
+                                              struct btrfs_key *location);
+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);
+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);
@@ -54,6 +103,13 @@ void btrfs_csum_final(u32 crc, char *result);
 int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
                             struct btrfs_root *root);
 int btrfs_open_device(struct btrfs_device *dev);
-int csum_tree_block(struct btrfs_root *root, struct extent_buffer *buf,
-                   int verify);
+int csum_tree_block_size(struct extent_buffer *buf, u16 csum_sectorsize,
+                        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_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);