btrfs-progs: doc: update defrag page

[platform/upstream/btrfs-progs.git] / ctree.h

diff --git a/ctree.h b/ctree.h
index b8c3062..f14a795 100644 (file)
--- a/ctree.h
+++ b/ctree.h
@@ -16,8 +16,8 @@
  * Boston, MA 021110-1307, USA.
  */
 
-#ifndef __BTRFS__
-#define __BTRFS__
+#ifndef __BTRFS_CTREE_H__
+#define __BTRFS_CTREE_H__
 
 #if BTRFS_FLAT_INCLUDES
 #include "list.h"
@@ -149,7 +149,7 @@ struct btrfs_free_space_ctl;
 /* csum types */
 #define BTRFS_CSUM_TYPE_CRC32  0
 
-static int btrfs_csum_sizes[] = { 4, 0 };
+static int btrfs_csum_sizes[] = { 4 };
 
 /* four bytes for CRC32 */
 #define BTRFS_CRC32_SIZE 4
@@ -309,6 +309,8 @@ static inline unsigned long btrfs_chunk_item_size(int num_stripes)
 #define BTRFS_HEADER_FLAG_RELOC                        (1ULL << 1)
 #define BTRFS_SUPER_FLAG_SEEDING               (1ULL << 32)
 #define BTRFS_SUPER_FLAG_METADUMP              (1ULL << 33)
+#define BTRFS_SUPER_FLAG_METADUMP_V2           (1ULL << 34)
+#define BTRFS_SUPER_FLAG_CHANGING_FSID         (1ULL << 35)
 
 #define BTRFS_BACKREF_REV_MAX          256
 #define BTRFS_BACKREF_REV_SHIFT                56
@@ -867,11 +869,21 @@ struct btrfs_csum_item {
  */
 #define BTRFS_SPACE_INFO_GLOBAL_RSV    (1ULL << 49)
 
-#define BTRFS_QGROUP_STATUS_OFF                        0
-#define BTRFS_QGROUP_STATUS_ON                 1
-#define BTRFS_QGROUP_STATUS_SCANNING           2
+#define BTRFS_QGROUP_LEVEL_SHIFT               48
 
-#define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT  (1 << 0)
+static inline u64 btrfs_qgroup_level(u64 qgroupid)
+{
+       return qgroupid >> BTRFS_QGROUP_LEVEL_SHIFT;
+}
+
+static inline u64 btrfs_qgroup_subvid(u64 qgroupid)
+{
+       return qgroupid & ((1ULL << BTRFS_QGROUP_LEVEL_SHIFT) - 1);
+}
+
+#define BTRFS_QGROUP_STATUS_FLAG_ON            (1ULL << 0)
+#define BTRFS_QGROUP_STATUS_FLAG_RESCAN                (1ULL << 1)
+#define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT  (1ULL << 2)
 
 struct btrfs_qgroup_status_item {
        __le64 version;
@@ -925,6 +937,7 @@ struct btrfs_block_group_cache {
        struct btrfs_block_group_item item;
        struct btrfs_space_info *space_info;
        struct btrfs_free_space_ctl *free_space_ctl;
+       u64 bytes_super;
        u64 pinned;
        u64 flags;
        int cached;
@@ -942,7 +955,9 @@ struct btrfs_device;
 struct btrfs_fs_devices;
 struct btrfs_fs_info {
        u8 fsid[BTRFS_FSID_SIZE];
+       u8 *new_fsid;
        u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
+       u8 *new_chunk_tree_uuid;
        struct btrfs_root *fs_root;
        struct btrfs_root *extent_root;
        struct btrfs_root *tree_root;
@@ -962,6 +977,7 @@ struct btrfs_fs_info {
        struct extent_io_tree pinned_extents;
        struct extent_io_tree pending_del;
        struct extent_io_tree extent_ins;
+       struct extent_io_tree *excluded_extents;
 
        /* logical->physical extent mapping */
        struct btrfs_mapping_tree mapping_tree;
@@ -996,6 +1012,8 @@ struct btrfs_fs_info {
        unsigned int on_restoring:1;
        unsigned int is_chunk_recover:1;
        unsigned int quota_enabled:1;
+       unsigned int suppress_check_block_errors:1;
+       unsigned int ignore_fsid_mismatch:1;
 
        int (*free_extent_hook)(struct btrfs_trans_handle *trans,
                                struct btrfs_root *root,
@@ -1004,6 +1022,7 @@ struct btrfs_fs_info {
                                int refs_to_drop);
        struct cache_tree *fsck_extent_cache;
        struct cache_tree *corrupt_blocks;
+
 };
 
 /*
@@ -1039,6 +1058,16 @@ struct btrfs_root {
        u64 highest_inode;
        u64 last_inode_alloc;
 
+       /*
+        * Record orphan data extent ref
+        *
+        * TODO: Don't restore things in btrfs_root.
+        * Directly record it into inode_record, which needs a lot of
+        * infrastructure change to allow cooperation between extent
+        * and fs tree scan.
+        */
+       struct list_head orphan_data_extents;
+
        /* the dirty list is only used by non-reference counted roots */
        struct list_head dirty_list;
        struct rb_node rb_node;
@@ -2056,6 +2085,15 @@ BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
 BTRFS_SETGET_FUNCS(qgroup_status_scan, struct btrfs_qgroup_status_item,
                   scan, 64);
 
+BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_version,
+                        struct btrfs_qgroup_status_item, version, 64);
+BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_generation,
+                        struct btrfs_qgroup_status_item, generation, 64);
+BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_flags,
+                        struct btrfs_qgroup_status_item, flags, 64);
+BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_scan,
+                        struct btrfs_qgroup_status_item, scan, 64);
+
 /* btrfs_qgroup_info_item */
 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
                   generation, 64);
@@ -2441,4 +2479,30 @@ static inline int is_fstree(u64 rootid)
                return 1;
        return 0;
 }
+
+/* inode.c */
+int check_dir_conflict(struct btrfs_root *root, char *name, int namelen,
+               u64 dir, u64 index);
+int btrfs_new_inode(struct btrfs_trans_handle *trans, struct btrfs_root *root,
+               u64 ino, u32 mode);
+int btrfs_add_link(struct btrfs_trans_handle *trans, struct btrfs_root *root,
+                  u64 ino, u64 parent_ino, char *name, int namelen,
+                  u8 type, u64 *index, int add_backref);
+int btrfs_unlink(struct btrfs_trans_handle *trans, struct btrfs_root *root,
+                u64 ino, u64 parent_ino, u64 index, const char *name,
+                int namelen, int add_orphan);
+int btrfs_add_orphan_item(struct btrfs_trans_handle *trans,
+                         struct btrfs_root *root, struct btrfs_path *path,
+                         u64 ino);
+int btrfs_mkdir(struct btrfs_trans_handle *trans, struct btrfs_root *root,
+               char *name, int namelen, u64 parent_ino, u64 *ino, int mode);
+
+/* file.c */
+int btrfs_get_extent(struct btrfs_trans_handle *trans,
+                    struct btrfs_root *root,
+                    struct btrfs_path *path,
+                    u64 ino, u64 offset, u64 len, int ins_len);
+int btrfs_punch_hole(struct btrfs_trans_handle *trans,
+                    struct btrfs_root *root,
+                    u64 ino, u64 offset, u64 len);
 #endif