diff options
| author | Anthony Liguori <aliguori@us.ibm.com> | 2012-02-15 17:18:04 -0600 |
|---|---|---|
| committer | Anthony Liguori <aliguori@us.ibm.com> | 2012-02-15 17:18:04 -0600 |
| commit | 65b31cc207b8ab949033870acf55bb124d12848e (patch) | |
| tree | c7727e413b24d8ae024fea2ab455f8c49be02b20 /block_int.h | |
| parent | b2d4b3f7b8c8ad0519c4705a3b850446068e6946 (diff) | |
| parent | b867672884afc39b6537a8aa6aa2f20a5154bf4f (diff) | |
Merge remote-tracking branch 'kwolf/for-anthony' into staging
* kwolf/for-anthony:
AHCI: Masking of IRQs actually masks them
sheepdog: fix co_recv coroutine context
AHCI: Fix port reset race
rewrite QEMU_BUILD_BUG_ON
qcow2: Keep unknown header extension when rewriting header
qcow2: Update whole header at once
vpc: Round up image size during fixed image creation
vpc: Add support for Fixed Disk type
iSCSI: add configuration variables for iSCSI
qemu-io: add write -z option for bdrv_co_write_zeroes
qed: add .bdrv_co_write_zeroes() support
qed: replace is_write with flags field
block: perform zero-detection during copy-on-read
block: add .bdrv_co_write_zeroes() interface
cutils: extract buffer_is_zero() from qemu-img.c
Diffstat (limited to 'block_int.h')
| -rw-r--r-- | block_int.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/block_int.h b/block_int.h index 7be2988ca7..7946cf66a1 100644 --- a/block_int.h +++ b/block_int.h @@ -131,6 +131,14 @@ struct BlockDriver { int64_t sector_num, int nb_sectors, QEMUIOVector *qiov); int coroutine_fn (*bdrv_co_writev)(BlockDriverState *bs, int64_t sector_num, int nb_sectors, QEMUIOVector *qiov); + /* + * Efficiently zero a region of the disk image. Typically an image format + * would use a compact metadata representation to implement this. This + * function pointer may be NULL and .bdrv_co_writev() will be called + * instead. + */ + int coroutine_fn (*bdrv_co_write_zeroes)(BlockDriverState *bs, + int64_t sector_num, int nb_sectors); int coroutine_fn (*bdrv_co_discard)(BlockDriverState *bs, int64_t sector_num, int nb_sectors); int coroutine_fn (*bdrv_co_is_allocated)(BlockDriverState *bs, |