convert/source-fs.h

   1 /*
   2  * This program is free software; you can redistribute it and/or
   3  * modify it under the terms of the GNU General Public
   4  * License v2 as published by the Free Software Foundation.
   5  *
   6  * This program is distributed in the hope that it will be useful,
   7  * but WITHOUT ANY WARRANTY; without even the implied warranty of
   8  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   9  * General Public License for more details.
  10  *
  11  * You should have received a copy of the GNU General Public
  12  * License along with this program; if not, write to the
  13  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  14  * Boston, MA 021110-1307, USA.
  15  */
  16
  17 #ifndef __BTRFS_CONVERT_SOURCE_FS_H__
  18 #define __BTRFS_CONVERT_SOURCE_FS_H__
  19
  20 #include "kerncompat.h"
  21 #include <linux/kdev_t.h>
  22 #include <sys/types.h>
  23 #include <pthread.h>
  24 #include <sys/types.h>
  25
  26 #define CONV_IMAGE_SUBVOL_OBJECTID BTRFS_FIRST_FREE_OBJECTID
  27
  28 /*
  29  * Reresents a simple contiguous range.
  30  *
  31  * For multiple or non-contiguous ranges, use extent_cache_tree from
  32  * extent-cache.c
  33  */
  34 struct simple_range {
  35         u64 start;
  36         u64 len;
  37 };
  38
  39 extern const struct simple_range btrfs_reserved_ranges[3];
  40
  41 struct task_info;
  42
  43 struct task_ctx {
  44         pthread_mutex_t mutex;
  45         u64 max_copy_inodes;
  46         u64 cur_copy_inodes;
  47         struct task_info *info;
  48 };
  49
  50 struct btrfs_convert_context;
  51
  52 #define SOURCE_FS_NAME_LEN      (16)
  53
  54 #define CONVERT_FLAG_DATACSUM           (1U << 0)
  55 #define CONVERT_FLAG_INLINE_DATA        (1U << 1)
  56 #define CONVERT_FLAG_XATTR              (1U << 2)
  57 #define CONVERT_FLAG_COPY_LABEL         (1U << 3)
  58 #define CONVERT_FLAG_SET_LABEL          (1U << 4)
  59
  60 /* 23.2.5 acl_tag_t values */
  61
  62 #define ACL_UNDEFINED_TAG       (0x00)
  63 #define ACL_USER_OBJ            (0x01)
  64 #define ACL_USER                (0x02)
  65 #define ACL_GROUP_OBJ           (0x04)
  66 #define ACL_GROUP               (0x08)
  67 #define ACL_MASK                (0x10)
  68 #define ACL_OTHER               (0x20)
  69
  70 /* 23.2.7 ACL qualifier constants */
  71
  72 #define ACL_UNDEFINED_ID        ((id_t)-1)
  73
  74 #define ACL_EA_VERSION          0x0002
  75
  76 typedef struct {
  77         __le16          e_tag;
  78         __le16          e_perm;
  79         __le32          e_id;
  80 } acl_ea_entry;
  81
  82 typedef struct {
  83         __le32          a_version;
  84         acl_ea_entry    a_entries[0];
  85 } acl_ea_header;
  86
  87 typedef struct {
  88         __le16          e_tag;
  89         __le16          e_perm;
  90         __le32          e_id;
  91 } ext2_acl_entry;
  92
  93 typedef struct {
  94         __le16          e_tag;
  95         __le16          e_perm;
  96 } ext2_acl_entry_short;
  97
  98 typedef struct {
  99         __le32          a_version;
 100 } ext2_acl_header;
 101
 102 static inline size_t acl_ea_size(int count)
 103 {
 104         return sizeof(acl_ea_header) + count * sizeof(acl_ea_entry);
 105 }
 106
 107 int ext2_acl_count(size_t size);
 108
 109 #ifndef MKDEV
 110 #define MINORBITS       20
 111 #define MKDEV(ma, mi)   (((ma) << MINORBITS) | (mi))
 112 #endif
 113
 114 dev_t decode_dev(u32 dev);
 115
 116 struct btrfs_convert_operations {
 117         const char name[SOURCE_FS_NAME_LEN];
 118         int (*open_fs)(struct btrfs_convert_context *cctx, const char *devname);
 119         int (*read_used_space)(struct btrfs_convert_context *cctx);
 120         int (*copy_inodes)(struct btrfs_convert_context *cctx,
 121                          struct btrfs_root *root, u32 covert_flags,
 122                          struct task_ctx *p);
 123         void (*close_fs)(struct btrfs_convert_context *cctx);
 124         int (*check_state)(struct btrfs_convert_context *cctx);
 125 };
 126
 127 struct btrfs_trans_handle;
 128 struct btrfs_root;
 129 struct btrfs_inode_item;
 130
 131 struct blk_iterate_data {
 132         struct btrfs_trans_handle *trans;
 133         struct btrfs_root *root;
 134         struct btrfs_root *convert_root;
 135         struct btrfs_inode_item *inode;
 136         u64 convert_ino;
 137         u64 objectid;
 138         u64 first_block;
 139         u64 disk_block;
 140         u64 num_blocks;
 141         u64 boundary;
 142         int checksum;
 143         int errcode;
 144 };
 145
 146 void init_convert_context(struct btrfs_convert_context *cctx);
 147 void clean_convert_context(struct btrfs_convert_context *cctx);
 148 int block_iterate_proc(u64 disk_block, u64 file_block,
 149                               struct blk_iterate_data *idata);
 150 void init_blk_iterate_data(struct blk_iterate_data *data,
 151                                   struct btrfs_trans_handle *trans,
 152                                   struct btrfs_root *root,
 153                                   struct btrfs_inode_item *inode,
 154                                   u64 objectid, int checksum);
 155 int convert_insert_dirent(struct btrfs_trans_handle *trans,
 156                                  struct btrfs_root *root,
 157                                  const char *name, size_t name_len,
 158                                  u64 dir, u64 objectid,
 159                                  u8 file_type, u64 index_cnt,
 160                                  struct btrfs_inode_item *inode);
 161 int read_disk_extent(struct btrfs_root *root, u64 bytenr,
 162                             u32 num_bytes, char *buffer);
 163 int record_file_blocks(struct blk_iterate_data *data,
 164                               u64 file_block, u64 disk_block, u64 num_blocks);
 165
 166 /*
 167  * Simple range functions
 168  *
 169  * Get range end (exclusive)
 170  */
 171 static inline u64 range_end(const struct simple_range *range)
 172 {
 173         return (range->start + range->len);
 174 }
 175
 176 #endif