diff options
| author | Peter Lieven <pl@kamp.de> | 2013-07-11 14:16:26 +0200 |
|---|---|---|
| committer | Michael Roth <mdroth@linux.vnet.ibm.com> | 2013-08-12 19:14:58 -0500 |
| commit | 404fbe47437144a6eae4bf9eef32ac9a5a1ccaf6 (patch) | |
| tree | b3a8a410d23b81aaa2aacf8e1761570d1b776b6d | |
| parent | ff57f145c1a525183c45af4d21b395761e7b88a1 (diff) | |
| download | qemu-404fbe47437144a6eae4bf9eef32ac9a5a1ccaf6.tar.gz | |
iscsi: remove support for misaligned nb_sectors in aio_readv
this hask is not working (anymore). support for misaligned offsets should
be handled at the block layer.
Signed-off-by: Peter Lieven <pl@kamp.de>
Cc: qemu-stable@nongnu.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
(cherry picked from commit 7e4d5a9f94a0d8485bf63e1f8256e0a0014495ab)
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
| -rw-r--r-- | block/iscsi.c | 22 |
1 files changed, 4 insertions, 18 deletions
diff --git a/block/iscsi.c b/block/iscsi.c index 91b602c538..df283ed4d7 100644 --- a/block/iscsi.c +++ b/block/iscsi.c @@ -62,8 +62,6 @@ typedef struct IscsiAIOCB { int status; int canceled; int retries; - size_t read_size; - size_t read_offset; int64_t sector_num; int nb_sectors; #ifdef __linux__ @@ -380,6 +378,7 @@ static int iscsi_aio_readv_acb(IscsiAIOCB *acb) { struct iscsi_context *iscsi = acb->iscsilun->iscsi; + size_t size; uint64_t lba; uint32_t num_sectors; int ret; @@ -392,20 +391,7 @@ iscsi_aio_readv_acb(IscsiAIOCB *acb) acb->status = -EINPROGRESS; acb->buf = NULL; - /* If LUN blocksize is bigger than BDRV_BLOCK_SIZE a read from QEMU - * may be misaligned to the LUN, so we may need to read some extra - * data. - */ - acb->read_offset = 0; - if (acb->iscsilun->block_size > BDRV_SECTOR_SIZE) { - uint64_t bdrv_offset = BDRV_SECTOR_SIZE * acb->sector_num; - - acb->read_offset = bdrv_offset % acb->iscsilun->block_size; - } - - num_sectors = (acb->read_size + acb->iscsilun->block_size - + acb->read_offset - 1) - / acb->iscsilun->block_size; + size = acb->nb_sectors * BDRV_SECTOR_SIZE; acb->task = malloc(sizeof(struct scsi_task)); if (acb->task == NULL) { @@ -416,8 +402,9 @@ iscsi_aio_readv_acb(IscsiAIOCB *acb) memset(acb->task, 0, sizeof(struct scsi_task)); acb->task->xfer_dir = SCSI_XFER_READ; + acb->task->expxferlen = size; lba = sector_qemu2lun(acb->sector_num, acb->iscsilun); - acb->task->expxferlen = acb->read_size; + num_sectors = sector_qemu2lun(acb->nb_sectors, acb->iscsilun); switch (acb->iscsilun->type) { case TYPE_DISK: @@ -472,7 +459,6 @@ iscsi_aio_readv(BlockDriverState *bs, int64_t sector_num, acb->sector_num = sector_num; acb->iscsilun = iscsilun; acb->qiov = qiov; - acb->read_size = BDRV_SECTOR_SIZE * (size_t)acb->nb_sectors; acb->retries = ISCSI_CMD_RETRIES; if (iscsi_aio_readv_acb(acb) != 0) { |