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[Qemu-devel] [PATCH 11/14] block: Add blk_co_readv/writev()
From: |
Kevin Wolf |
Subject: |
[Qemu-devel] [PATCH 11/14] block: Add blk_co_readv/writev() |
Date: |
Wed, 4 May 2016 11:39:22 +0200 |
Signed-off-by: Kevin Wolf <address@hidden>
---
block/block-backend.c | 26 ++++++++++++++++++++++++++
include/sysemu/block-backend.h | 4 ++++
trace-events | 2 ++
3 files changed, 32 insertions(+)
diff --git a/block/block-backend.c b/block/block-backend.c
index 25bb5ca..8dc3aa5 100644
--- a/block/block-backend.c
+++ b/block/block-backend.c
@@ -794,6 +794,19 @@ static int coroutine_fn blk_co_pwritev(BlockBackend *blk,
int64_t offset,
return bdrv_co_pwritev(blk_bs(blk), offset, bytes, qiov, flags);
}
+int coroutine_fn blk_co_readv(BlockBackend *blk, int64_t sector_num,
+ int nb_sectors, QEMUIOVector *qiov)
+{
+ trace_blk_co_readv(blk, blk_bs(blk), sector_num, nb_sectors);
+
+ if (nb_sectors < 0 || nb_sectors > BDRV_REQUEST_MAX_SECTORS) {
+ return -EINVAL;
+ }
+
+ return blk_co_preadv(blk, sector_num << BDRV_SECTOR_BITS,
+ nb_sectors << BDRV_SECTOR_BITS, qiov, 0);
+}
+
int coroutine_fn blk_co_copy_on_readv(BlockBackend *blk,
int64_t sector_num, int nb_sectors, QEMUIOVector *qiov)
{
@@ -808,6 +821,19 @@ int coroutine_fn blk_co_copy_on_readv(BlockBackend *blk,
BDRV_REQ_COPY_ON_READ);
}
+int coroutine_fn blk_co_writev(BlockBackend *blk, int64_t sector_num,
+ int nb_sectors, QEMUIOVector *qiov)
+{
+ trace_blk_co_writev(blk, blk_bs(blk), sector_num, nb_sectors);
+
+ if (nb_sectors < 0 || nb_sectors > BDRV_REQUEST_MAX_SECTORS) {
+ return -EINVAL;
+ }
+
+ return blk_co_pwritev(blk, sector_num << BDRV_SECTOR_BITS,
+ nb_sectors << BDRV_SECTOR_BITS, qiov, 0);
+}
+
typedef struct BlkRwCo {
BlockBackend *blk;
int64_t offset;
diff --git a/include/sysemu/block-backend.h b/include/sysemu/block-backend.h
index eac4d88..d98552c 100644
--- a/include/sysemu/block-backend.h
+++ b/include/sysemu/block-backend.h
@@ -116,8 +116,12 @@ int blk_read(BlockBackend *blk, int64_t sector_num,
uint8_t *buf,
int nb_sectors);
int blk_read_unthrottled(BlockBackend *blk, int64_t sector_num, uint8_t *buf,
int nb_sectors);
+int coroutine_fn blk_co_readv(BlockBackend *blk, int64_t sector_num,
+ int nb_sectors, QEMUIOVector *qiov);
int coroutine_fn blk_co_copy_on_readv(BlockBackend *blk,
int64_t sector_num, int nb_sectors, QEMUIOVector *qiov);
+int coroutine_fn blk_co_writev(BlockBackend *blk, int64_t sector_num,
+ int nb_sectors, QEMUIOVector *qiov);
int blk_write(BlockBackend *blk, int64_t sector_num, const uint8_t *buf,
int nb_sectors);
int blk_write_zeroes(BlockBackend *blk, int64_t sector_num,
diff --git a/trace-events b/trace-events
index 9beb588..3b5cce3 100644
--- a/trace-events
+++ b/trace-events
@@ -62,6 +62,8 @@ bdrv_open_common(void *bs, const char *filename, int flags,
const char *format_n
bdrv_lock_medium(void *bs, bool locked) "bs %p locked %d"
# block/block-backend.c
+blk_co_readv(void *blk, void *bs, int64_t sector_num, int nb_sector) "blk %p
bs %p sector_num %"PRId64" nb_sectors %d"
+blk_co_writev(void *blk, void *bs, int64_t sector_num, int nb_sector) "blk %p
bs %p sector_num %"PRId64" nb_sectors %d"
blk_co_copy_on_readv(void *blk, void *bs, int64_t sector_num, int nb_sector)
"blk %p bs %p sector_num %"PRId64" nb_sectors %d"
# block/io.c
--
1.8.3.1
- [Qemu-devel] [PATCH 06/14] mirror: Allow target that already has a BlockBackend, (continued)
- [Qemu-devel] [PATCH 06/14] mirror: Allow target that already has a BlockBackend, Kevin Wolf, 2016/05/04
- [Qemu-devel] [PATCH 01/14] block: keep a list of block jobs, Kevin Wolf, 2016/05/04
- [Qemu-devel] [PATCH 08/14] backup: Don't leak BackupBlockJob in error path, Kevin Wolf, 2016/05/04
- [Qemu-devel] [PATCH 02/14] block: Cancel jobs first in bdrv_close_all(), Kevin Wolf, 2016/05/04
- [Qemu-devel] [PATCH 11/14] block: Add blk_co_readv/writev(),
Kevin Wolf <=
- [Qemu-devel] [PATCH 10/14] backup: Remove bs parameter from backup_do_cow(), Kevin Wolf, 2016/05/04
- [Qemu-devel] [PATCH 14/14] blockjob: Remove BlockJob.bs, Kevin Wolf, 2016/05/04
- [Qemu-devel] [PATCH 13/14] commit: Use BlockBackend for I/O, Kevin Wolf, 2016/05/04
- [Qemu-devel] [PATCH 09/14] backup: Pack Notifier within BackupBlockJob, Kevin Wolf, 2016/05/04
- [Qemu-devel] [PATCH 07/14] mirror: Use BlockBackend for I/O, Kevin Wolf, 2016/05/04