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qed: adjust the way to get nb_sectors 

This patch is only to refactor some lines of codes to get better and more robust codes.

As you have seen, in qed_read_table_cb() it's nice to
use qiov->size because that function doesn't obviously use a single
struct iovec.

In other two functions, if qiov use more than one struct iovec, the existing way will get wrong nb_sectors.
To make the code more robust, it will be nicer to refactor the existing way as below.

Signed-off-by: Zhi Yong Wu <wuzhy@linux.vnet.ibm.com>
Acked-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Zhi Yong Wu 2011-11-01 16:04:32 +08:00 committed by Kevin Wolf
parent aef4acb661
commit 23e9a39e7d
1 changed files with 3 additions and 3 deletions
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6
block/qed-table.c
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@ -29,7 +29,7 @@ static void qed_read_table_cb(void *opaque, int ret)
{
QEDReadTableCB *read_table_cb = opaque;
QEDTable *table = read_table_cb->table;
int noffsets = read_table_cb->iov.iov_len / sizeof(uint64_t);
int noffsets = read_table_cb->qiov.size / sizeof(uint64_t);
int i;
/* Handle I/O error */
@ -65,7 +65,7 @@ static void qed_read_table(BDRVQEDState *s, uint64_t offset, QEDTable *table,
qemu_iovec_init_external(qiov, &read_table_cb->iov, 1);
aiocb = bdrv_aio_readv(s->bs->file, offset / BDRV_SECTOR_SIZE, qiov,
read_table_cb->iov.iov_len / BDRV_SECTOR_SIZE,
qiov->size / BDRV_SECTOR_SIZE,
qed_read_table_cb, read_table_cb);
if (!aiocb) {
qed_read_table_cb(read_table_cb, -EIO);
@ -160,7 +160,7 @@ static void qed_write_table(BDRVQEDState *s, uint64_t offset, QEDTable *table,
aiocb = bdrv_aio_writev(s->bs->file, offset / BDRV_SECTOR_SIZE,
&write_table_cb->qiov,
write_table_cb->iov.iov_len / BDRV_SECTOR_SIZE,
write_table_cb->qiov.size / BDRV_SECTOR_SIZE,
qed_write_table_cb, write_table_cb);
if (!aiocb) {
qed_write_table_cb(write_table_cb, -EIO);