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authorZhao Lei <zhaolei@cn.fujitsu.com>2015-01-20 10:11:34 +0300
committerChris Mason <clm@fb.com>2015-01-22 05:06:48 +0300
commit6e9606d2a2dce098c1739fb3cd82a1c34fd73d3a (patch)
treeeeeb1c991d4971cdbfda675bbbb4b37b0c6f5ebb /fs/btrfs/volumes.h
parent8e5cfb55d3f7dc764cd7f4c966d4c2687eaf7569 (diff)
downloadlinux-6e9606d2a2dce098c1739fb3cd82a1c34fd73d3a.tar.xz
Btrfs: add ref_count and free function for btrfs_bio
1: ref_count is simple than current RBIO_HOLD_BBIO_MAP_BIT flag to keep btrfs_bio's memory in raid56 recovery implement. 2: free function for bbio will make code clean and flexible, plus forced data type checking in compile. Changelog v1->v2: Rename following by David Sterba's suggestion: put_btrfs_bio() -> btrfs_put_bio() get_btrfs_bio() -> btrfs_get_bio() bbio->ref_count -> bbio->refs Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com> Signed-off-by: Miao Xie <miaox@cn.fujitsu.com> Signed-off-by: Chris Mason <clm@fb.com>
Diffstat (limited to 'fs/btrfs/volumes.h')
-rw-r--r--fs/btrfs/volumes.h10
1 files changed, 3 insertions, 7 deletions
diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h
index fb0e8c3f296e..4313e8ff91e5 100644
--- a/fs/btrfs/volumes.h
+++ b/fs/btrfs/volumes.h
@@ -295,6 +295,7 @@ typedef void (btrfs_bio_end_io_t) (struct btrfs_bio *bio, int err);
#define BTRFS_BIO_ORIG_BIO_SUBMITTED (1 << 0)
struct btrfs_bio {
+ atomic_t refs;
atomic_t stripes_pending;
struct btrfs_fs_info *fs_info;
bio_end_io_t *end_io;
@@ -394,13 +395,8 @@ struct btrfs_balance_control {
int btrfs_account_dev_extents_size(struct btrfs_device *device, u64 start,
u64 end, u64 *length);
-
-#define btrfs_bio_size(total_stripes, real_stripes) \
- (sizeof(struct btrfs_bio) + \
- (sizeof(struct btrfs_bio_stripe) * (total_stripes)) + \
- (sizeof(int) * (real_stripes)) + \
- (sizeof(u64) * (real_stripes)))
-
+void btrfs_get_bbio(struct btrfs_bio *bbio);
+void btrfs_put_bbio(struct btrfs_bio *bbio);
int btrfs_map_block(struct btrfs_fs_info *fs_info, int rw,
u64 logical, u64 *length,
struct btrfs_bio **bbio_ret, int mirror_num);