summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
Diffstat
-rw-r--r--block/io.c5
-rw-r--r--block/qcow.c45
-rw-r--r--block/qcow2-cluster.c2
-rw-r--r--block/qcow2-refcount.c2
-rw-r--r--block/qcow2.c47
-rw-r--r--block/vdi.c4
-rw-r--r--block/vvfat.c5
-rw-r--r--include/block/block.h2
8 files changed, 100 insertions, 12 deletions
diff --git a/block/io.c b/block/io.c
index 6dfc0ebb55..2e04a80010 100644
--- a/block/io.c
+++ b/block/io.c
@@ -642,10 +642,11 @@ int bdrv_read(BdrvChild *child, int64_t sector_num,
-EINVAL Invalid sector number or nb_sectors
-EACCES Trying to write a read-only device
*/
-int bdrv_write(BlockDriverState *bs, int64_t sector_num,
+int bdrv_write(BdrvChild *child, int64_t sector_num,
const uint8_t *buf, int nb_sectors)
{
- return bdrv_rw_co(bs, sector_num, (uint8_t *)buf, nb_sectors, true, 0);
+ return bdrv_rw_co(child->bs, sector_num, (uint8_t *)buf, nb_sectors,
+ true, 0);
}
int bdrv_pwrite_zeroes(BlockDriverState *bs, int64_t offset,
diff --git a/block/qcow.c b/block/qcow.c
index 0db43f899d..674595ea54 100644
--- a/block/qcow.c
+++ b/block/qcow.c
@@ -913,6 +913,49 @@ static int qcow_make_empty(BlockDriverState *bs)
return 0;
}
+typedef struct QcowWriteCo {
+ BlockDriverState *bs;
+ int64_t sector_num;
+ const uint8_t *buf;
+ int nb_sectors;
+ int ret;
+} QcowWriteCo;
+
+static void qcow_write_co_entry(void *opaque)
+{
+ QcowWriteCo *co = opaque;
+ QEMUIOVector qiov;
+
+ struct iovec iov = (struct iovec) {
+ .iov_base = (uint8_t*) co->buf,
+ .iov_len = co->nb_sectors * BDRV_SECTOR_SIZE,
+ };
+ qemu_iovec_init_external(&qiov, &iov, 1);
+
+ co->ret = qcow_co_writev(co->bs, co->sector_num, co->nb_sectors, &qiov);
+}
+
+/* Wrapper for non-coroutine contexts */
+static int qcow_write(BlockDriverState *bs, int64_t sector_num,
+ const uint8_t *buf, int nb_sectors)
+{
+ Coroutine *co;
+ AioContext *aio_context = bdrv_get_aio_context(bs);
+ QcowWriteCo data = {
+ .bs = bs,
+ .sector_num = sector_num,
+ .buf = buf,
+ .nb_sectors = nb_sectors,
+ .ret = -EINPROGRESS,
+ };
+ co = qemu_coroutine_create(qcow_write_co_entry);
+ qemu_coroutine_enter(co, &data);
+ while (data.ret == -EINPROGRESS) {
+ aio_poll(aio_context, true);
+ }
+ return data.ret;
+}
+
/* XXX: put compressed sectors first, then all the cluster aligned
tables to avoid losing bytes in alignment */
static int qcow_write_compressed(BlockDriverState *bs, int64_t sector_num,
@@ -969,7 +1012,7 @@ static int qcow_write_compressed(BlockDriverState *bs, int64_t sector_num,
if (ret != Z_STREAM_END || out_len >= s->cluster_size) {
/* could not compress: write normal cluster */
- ret = bdrv_write(bs, sector_num, buf, s->cluster_sectors);
+ ret = qcow_write(bs, sector_num, buf, s->cluster_sectors);
if (ret < 0) {
goto fail;
}
diff --git a/block/qcow2-cluster.c b/block/qcow2-cluster.c
index c1e9eee4a7..a2490d74dd 100644
--- a/block/qcow2-cluster.c
+++ b/block/qcow2-cluster.c
@@ -1784,7 +1784,7 @@ static int expand_zero_clusters_in_l1(BlockDriverState *bs, uint64_t *l1_table,
goto fail;
}
- ret = bdrv_write(bs->file->bs, l2_offset / BDRV_SECTOR_SIZE,
+ ret = bdrv_write(bs->file, l2_offset / BDRV_SECTOR_SIZE,
(void *)l2_table, s->cluster_sectors);
if (ret < 0) {
goto fail;
diff --git a/block/qcow2-refcount.c b/block/qcow2-refcount.c
index 3bef410839..12e7e6b9a2 100644
--- a/block/qcow2-refcount.c
+++ b/block/qcow2-refcount.c
@@ -2098,7 +2098,7 @@ write_refblocks:
on_disk_refblock = (void *)((char *) *refcount_table +
refblock_index * s->cluster_size);
- ret = bdrv_write(bs->file->bs, refblock_offset / BDRV_SECTOR_SIZE,
+ ret = bdrv_write(bs->file, refblock_offset / BDRV_SECTOR_SIZE,
on_disk_refblock, s->cluster_sectors);
if (ret < 0) {
fprintf(stderr, "ERROR writing refblock: %s\n", strerror(-ret));
diff --git a/block/qcow2.c b/block/qcow2.c
index 017893181e..cd9c27b085 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -2533,6 +2533,51 @@ static int qcow2_truncate(BlockDriverState *bs, int64_t offset)
return 0;
}
+typedef struct Qcow2WriteCo {
+ BlockDriverState *bs;
+ int64_t sector_num;
+ const uint8_t *buf;
+ int nb_sectors;
+ int ret;
+} Qcow2WriteCo;
+
+static void qcow2_write_co_entry(void *opaque)
+{
+ Qcow2WriteCo *co = opaque;
+ QEMUIOVector qiov;
+ uint64_t offset = co->sector_num * BDRV_SECTOR_SIZE;
+ uint64_t bytes = co->nb_sectors * BDRV_SECTOR_SIZE;
+
+ struct iovec iov = (struct iovec) {
+ .iov_base = (uint8_t*) co->buf,
+ .iov_len = bytes,
+ };
+ qemu_iovec_init_external(&qiov, &iov, 1);
+
+ co->ret = qcow2_co_pwritev(co->bs, offset, bytes, &qiov, 0);
+}
+
+/* Wrapper for non-coroutine contexts */
+static int qcow2_write(BlockDriverState *bs, int64_t sector_num,
+ const uint8_t *buf, int nb_sectors)
+{
+ Coroutine *co;
+ AioContext *aio_context = bdrv_get_aio_context(bs);
+ Qcow2WriteCo data = {
+ .bs = bs,
+ .sector_num = sector_num,
+ .buf = buf,
+ .nb_sectors = nb_sectors,
+ .ret = -EINPROGRESS,
+ };
+ co = qemu_coroutine_create(qcow2_write_co_entry);
+ qemu_coroutine_enter(co, &data);
+ while (data.ret == -EINPROGRESS) {
+ aio_poll(aio_context, true);
+ }
+ return data.ret;
+}
+
/* XXX: put compressed sectors first, then all the cluster aligned
tables to avoid losing bytes in alignment */
static int qcow2_write_compressed(BlockDriverState *bs, int64_t sector_num,
@@ -2596,7 +2641,7 @@ static int qcow2_write_compressed(BlockDriverState *bs, int64_t sector_num,
if (ret != Z_STREAM_END || out_len >= s->cluster_size) {
/* could not compress: write normal cluster */
- ret = bdrv_write(bs, sector_num, buf, s->cluster_sectors);
+ ret = qcow2_write(bs, sector_num, buf, s->cluster_sectors);
if (ret < 0) {
goto fail;
}
diff --git a/block/vdi.c b/block/vdi.c
index 46a3436a37..b2871caf92 100644
--- a/block/vdi.c
+++ b/block/vdi.c
@@ -719,7 +719,7 @@ vdi_co_pwritev(BlockDriverState *bs, uint64_t offset, uint64_t bytes,
assert(VDI_IS_ALLOCATED(bmap_first));
*header = s->header;
vdi_header_to_le(header);
- ret = bdrv_write(bs->file->bs, 0, block, 1);
+ ret = bdrv_write(bs->file, 0, block, 1);
g_free(block);
block = NULL;
@@ -737,7 +737,7 @@ vdi_co_pwritev(BlockDriverState *bs, uint64_t offset, uint64_t bytes,
base = ((uint8_t *)&s->bmap[0]) + bmap_first * SECTOR_SIZE;
logout("will write %u block map sectors starting from entry %u\n",
n_sectors, bmap_first);
- ret = bdrv_write(bs->file->bs, offset, base, n_sectors);
+ ret = bdrv_write(bs->file, offset, base, n_sectors);
}
return ret;
diff --git a/block/vvfat.c b/block/vvfat.c
index 5f980bbf80..c3f24c6eb0 100644
--- a/block/vvfat.c
+++ b/block/vvfat.c
@@ -1834,8 +1834,7 @@ static uint32_t get_cluster_count_for_direntry(BDRVVVFATState* s,
if (res) {
return -1;
}
- res = bdrv_write(s->qcow->bs, offset,
- s->cluster_buffer, 1);
+ res = bdrv_write(s->qcow, offset, s->cluster_buffer, 1);
if (res) {
return -2;
}
@@ -2889,7 +2888,7 @@ DLOG(checkpoint());
* Use qcow backend. Commit later.
*/
DLOG(fprintf(stderr, "Write to qcow backend: %d + %d\n", (int)sector_num, nb_sectors));
- ret = bdrv_write(s->qcow->bs, sector_num, buf, nb_sectors);
+ ret = bdrv_write(s->qcow, sector_num, buf, nb_sectors);
if (ret < 0) {
fprintf(stderr, "Error writing to qcow backend\n");
return ret;
diff --git a/include/block/block.h b/include/block/block.h
index b6744abdfa..ea17936f41 100644
--- a/include/block/block.h
+++ b/include/block/block.h
@@ -228,7 +228,7 @@ void bdrv_reopen_commit(BDRVReopenState *reopen_state);
void bdrv_reopen_abort(BDRVReopenState *reopen_state);
int bdrv_read(BdrvChild *child, int64_t sector_num,
uint8_t *buf, int nb_sectors);
-int bdrv_write(BlockDriverState *bs, int64_t sector_num,
+int bdrv_write(BdrvChild *child, int64_t sector_num,
const uint8_t *buf, int nb_sectors);
int bdrv_pwrite_zeroes(BlockDriverState *bs, int64_t offset,
int count, BdrvRequestFlags flags);
generated by cgit v1.2.1 (git 2.18.0) at 2024-05-29 01:12:21 +0000