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authorQu Wenruo <quwenruo@cn.fujitsu.com>2016-01-29 13:03:14 +0800
committerDavid Sterba <dsterba@suse.com>2016-06-07 18:15:19 +0200
commit330ca2d6dfe074fd14798ba7a60d6fda43ab932a (patch)
tree4b90f39c8946c56ec449fbb374d8bc686f1bfda4 /utils.h
parent522ef705e38fdb9ae952344b454da392e60dc90d (diff)
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btrfs-progs: utils: Introduce new function for convert
Introduce new function make_convert_btrfs() for convert. This new function will have the following features: 1) Allocate temporary sb/metadata/system chunk, avoiding old used data 2) More structured functions No more over 1000 lines function, better function split and code reuse This will finally replace current make_btrfs(), but now only used for convert. Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com> Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'utils.h')
-rw-r--r--utils.h27
1 files changed, 26 insertions, 1 deletions
diff --git a/utils.h b/utils.h
index 4fee469..c79f81e 100644
--- a/utils.h
+++ b/utils.h
@@ -46,6 +46,8 @@
| BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA \
| BTRFS_FEATURE_INCOMPAT_NO_HOLES)
+#define BTRFS_CONVERT_META_GROUP_SIZE (32 * 1024 * 1024)
+
#define BTRFS_FEATURE_LIST_ALL (1ULL << 63)
#define BTRFS_SCAN_MOUNTED (1ULL << 0)
@@ -123,7 +125,30 @@ struct btrfs_mkfs_config {
u64 super_bytenr;
};
-int make_btrfs(int fd, struct btrfs_mkfs_config *cfg);
+struct btrfs_convert_context {
+ u32 blocksize;
+ u32 first_data_block;
+ u32 block_count;
+ u32 inodes_count;
+ u32 free_inodes_count;
+ u64 total_bytes;
+ char *volume_name;
+ const struct btrfs_convert_operations *convert_ops;
+
+ /* The accurate used space of old filesystem */
+ struct cache_tree used;
+
+ /* Batched ranges which must be covered by data chunks */
+ struct cache_tree data_chunks;
+
+ /* Free space which is not covered by data_chunks */
+ struct cache_tree free;
+
+ void *fs_data;
+};
+
+int make_btrfs(int fd, struct btrfs_mkfs_config *cfg,
+ struct btrfs_convert_context *cctx);
int btrfs_make_root_dir(struct btrfs_trans_handle *trans,
struct btrfs_root *root, u64 objectid);
int btrfs_prepare_device(int fd, const char *file, int zero_end,