---
block/qcow2.c | 4 ++--
block/qed.c | 4 ++--
cutils.c | 44 ++++----------------------------------------
linux-aio.c | 4 ++--
posix-aio-compat.c | 8 +++-----
qemu-common.h | 5 ++---
6 files changed, 15 insertions(+), 54 deletions(-)
diff --git a/block/qcow2.c b/block/qcow2.c
index 7aece65..941a6a9 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -407,7 +407,7 @@ int qcow2_backing_read1(BlockDriverState *bs, QEMUIOVector
*qiov,
else
n1 = bs->total_sectors - sector_num;
- qemu_iovec_memset_skip(qiov, 0, 512 * (nb_sectors - n1), 512 * n1);
+ qemu_iovec_memset(qiov, 512 * n1, 0, 512 * (nb_sectors - n1));
return n1;
}
@@ -467,7 +467,7 @@ static coroutine_fn int qcow2_co_readv(BlockDriverState
*bs, int64_t sector_num,
}
} else {
/* Note: in this case, no need to wait */
- qemu_iovec_memset(&hd_qiov, 0, 512 * cur_nr_sectors);
+ qemu_iovec_memset(&hd_qiov, 0, 0, 512 * cur_nr_sectors);
}
} else if (cluster_offset& QCOW_OFLAG_COMPRESSED) {
/* add AIO support for compressed blocks ? */
diff --git a/block/qed.c b/block/qed.c
index a041d31..6f9325b 100644
--- a/block/qed.c
+++ b/block/qed.c
@@ -738,7 +738,7 @@ static void qed_read_backing_file(BDRVQEDState *s, uint64_t
pos,
/* Zero all sectors if reading beyond the end of the backing file */
if (pos>= backing_length ||
pos + qiov->size> backing_length) {
- qemu_iovec_memset(qiov, 0, qiov->size);
+ qemu_iovec_memset(qiov, 0, 0, qiov->size);
}
/* Complete now if there are no backing file sectors to read */
@@ -1253,7 +1253,7 @@ static void qed_aio_read_data(void *opaque, int ret,
/* Handle zero cluster and backing file reads */
if (ret == QED_CLUSTER_ZERO) {
- qemu_iovec_memset(&acb->cur_qiov, 0, acb->cur_qiov.size);
+ qemu_iovec_memset(&acb->cur_qiov, 0, 0, acb->cur_qiov.size);
qed_aio_next_io(acb, 0);
return;
} else if (ret != QED_CLUSTER_FOUND) {
diff --git a/cutils.c b/cutils.c
index af308cd..0ddf4c7 100644
--- a/cutils.c
+++ b/cutils.c
@@ -26,6 +26,7 @@
#include<math.h>
#include "qemu_socket.h"
+#include "iov.h"
void pstrcpy(char *buf, int buf_size, const char *str)
{
@@ -260,47 +261,10 @@ void qemu_iovec_from_buffer(QEMUIOVector *qiov, const
void *buf, size_t count)
}
}
-void qemu_iovec_memset(QEMUIOVector *qiov, int c, size_t count)
+size_t qemu_iovec_memset(QEMUIOVector *qiov, size_t offset,
+ int fillc, size_t bytes)
{
- size_t n;
- int i;
-
- for (i = 0; i< qiov->niov&& count; ++i) {
- n = MIN(count, qiov->iov[i].iov_len);
- memset(qiov->iov[i].iov_base, c, n);
- count -= n;
- }
-}
-
-void qemu_iovec_memset_skip(QEMUIOVector *qiov, int c, size_t count,
- size_t skip)
-{
- int i;
- size_t done;
- void *iov_base;
- uint64_t iov_len;
-
- done = 0;
- for (i = 0; (i< qiov->niov)&& (done != count); i++) {
- if (skip>= qiov->iov[i].iov_len) {
- /* Skip the whole iov */
- skip -= qiov->iov[i].iov_len;
- continue;
- } else {
- /* Skip only part (or nothing) of the iov */
- iov_base = (uint8_t*) qiov->iov[i].iov_base + skip;
- iov_len = qiov->iov[i].iov_len - skip;
- skip = 0;
- }
-
- if (done + iov_len> count) {
- memset(iov_base, c, count - done);
- break;
- } else {
- memset(iov_base, c, iov_len);
- }
- done += iov_len;
- }
+ return iov_memset(qiov->iov, qiov->niov, offset, fillc, bytes);
}
/*
diff --git a/linux-aio.c b/linux-aio.c
index d2fc2e7..5a46c13 100644
--- a/linux-aio.c
+++ b/linux-aio.c
@@ -64,8 +64,8 @@ static void qemu_laio_process_completion(struct
qemu_laio_state *s,
} else if (ret>= 0) {
/* Short reads mean EOF, pad with zeros. */
if (laiocb->is_read) {
- qemu_iovec_memset_skip(laiocb->qiov, 0,
- laiocb->qiov->size - ret, ret);
+ qemu_iovec_memset(laiocb->qiov, ret, 0,
+ laiocb->qiov->size - ret);
} else {
ret = -EINVAL;
}
diff --git a/posix-aio-compat.c b/posix-aio-compat.c
index d311d13..1ab4a18 100644
--- a/posix-aio-compat.c
+++ b/posix-aio-compat.c
@@ -29,6 +29,7 @@
#include "qemu-common.h"
#include "trace.h"
#include "block_int.h"
+#include "iov.h"
#include "block/raw-posix-aio.h"
@@ -351,11 +352,8 @@ static void *aio_thread(void *unused)
if (ret>= 0&& ret< aiocb->aio_nbytes&&
aiocb->common.bs->growable) {
/* A short read means that we have reached EOF. Pad the buffer
* with zeros for bytes after EOF. */
- QEMUIOVector qiov;
-
- qemu_iovec_init_external(&qiov, aiocb->aio_iov,
- aiocb->aio_niov);
- qemu_iovec_memset_skip(&qiov, 0, aiocb->aio_nbytes - ret, ret);
+ iov_memset(aiocb->aio_iov, aiocb->aio_niov, ret,
+ 0, aiocb->aio_nbytes - ret);
ret = aiocb->aio_nbytes;
}
diff --git a/qemu-common.h b/qemu-common.h
index b0fdf5c..3c556c8 100644
--- a/qemu-common.h
+++ b/qemu-common.h
@@ -344,9 +344,8 @@ void qemu_iovec_destroy(QEMUIOVector *qiov);
void qemu_iovec_reset(QEMUIOVector *qiov);
void qemu_iovec_to_buffer(QEMUIOVector *qiov, void *buf);
void qemu_iovec_from_buffer(QEMUIOVector *qiov, const void *buf, size_t
count);
-void qemu_iovec_memset(QEMUIOVector *qiov, int c, size_t count);
-void qemu_iovec_memset_skip(QEMUIOVector *qiov, int c, size_t count,
- size_t skip);
+size_t qemu_iovec_memset(QEMUIOVector *qiov, size_t offset,
+ int fillc, size_t bytes);
bool buffer_is_zero(const void *buf, size_t len);