diff options
Diffstat (limited to 'fs/btrfs/volumes.h')
| -rw-r--r-- | fs/btrfs/volumes.h | 25 |
1 files changed, 22 insertions, 3 deletions
diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h index f2a152937cd4..efa6a3d48cd8 100644 --- a/fs/btrfs/volumes.h +++ b/fs/btrfs/volumes.h @@ -11,6 +11,7 @@ #include <linux/btrfs.h> #include "async-thread.h" #include "messages.h" +#include "disk-io.h" #define BTRFS_MAX_DATA_CHUNK_SIZE (10ULL * SZ_1G) @@ -397,7 +398,15 @@ typedef void (*btrfs_bio_end_io_t)(struct btrfs_bio *bbio); * Mostly for btrfs specific features like csum and mirror_num. */ struct btrfs_bio { - unsigned int mirror_num; + unsigned int mirror_num:7; + + /* + * Extra indicator for metadata bios. + * For some btrfs bios they use pages without a mapping, thus + * we can not rely on page->mapping->host to determine if + * it's a metadata bio. + */ + unsigned int is_metadata:1; struct bvec_iter iter; /* for direct I/O */ @@ -405,8 +414,16 @@ struct btrfs_bio { /* @device is for stripe IO submission. */ struct btrfs_device *device; - u8 *csum; - u8 csum_inline[BTRFS_BIO_INLINE_CSUM_SIZE]; + union { + /* For data checksum verification. */ + struct { + u8 *csum; + u8 csum_inline[BTRFS_BIO_INLINE_CSUM_SIZE]; + }; + + /* For metadata parentness verification. */ + struct btrfs_tree_parent_check parent_check; + }; /* End I/O information supplied to btrfs_bio_alloc */ btrfs_bio_end_io_t end_io; @@ -443,6 +460,8 @@ static inline void btrfs_bio_end_io(struct btrfs_bio *bbio, blk_status_t status) static inline void btrfs_bio_free_csum(struct btrfs_bio *bbio) { + if (bbio->is_metadata) + return; if (bbio->csum != bbio->csum_inline) { kfree(bbio->csum); bbio->csum = NULL; |