This enables byte granularity requests for blkverify, and at the same
time gets us rid of another user of the BDS-level AIO emulation.
The reference output of a test case must be changed because the
verification failure message reports byte offsets instead of sectors
now.
Signed-off-by: Kevin Wolf <kw...@redhat.com>
---
Depends on "coroutine: Introduce qemu_coroutine_enter_if_inactive()"
(Patch 1 from the quorum series)
block/blkverify.c | 201 ++++++++++++++++++++++-----------------------
tests/qemu-iotests/071.out | 8 +-
2 files changed, 100 insertions(+), 109 deletions(-)
diff --git a/block/blkverify.c b/block/blkverify.c
index 28f9af6..43a940c 100644
--- a/block/blkverify.c
+++ b/block/blkverify.c
@@ -19,38 +19,36 @@ typedef struct {
BdrvChild *test_file;
} BDRVBlkverifyState;
-typedef struct BlkverifyAIOCB BlkverifyAIOCB;
-struct BlkverifyAIOCB {
- BlockAIOCB common;
+typedef struct BlkverifyRequest {
+ Coroutine *co;
+ BlockDriverState *bs;
/* Request metadata */
bool is_write;
- int64_t sector_num;
- int nb_sectors;
+ uint64_t offset;
+ uint64_t bytes;
+ int flags;
- int ret; /* first completed request's result */
- unsigned int done; /* completion counter */
+ int (*request_fn)(BdrvChild *, int64_t, unsigned int, QEMUIOVector *,
+ BdrvRequestFlags);
- QEMUIOVector *qiov; /* user I/O vector */
- QEMUIOVector raw_qiov; /* cloned I/O vector for raw file */
- void *buf; /* buffer for raw file I/O */
+ int ret; /* test image result */
+ int raw_ret; /* raw image result */
- void (*verify)(BlkverifyAIOCB *acb);
-};
+ unsigned int done; /* completion counter */
-static const AIOCBInfo blkverify_aiocb_info = {
- .aiocb_size = sizeof(BlkverifyAIOCB),
-};
+ QEMUIOVector *qiov; /* user I/O vector */
+ QEMUIOVector *raw_qiov; /* cloned I/O vector for raw file */
+} BlkverifyRequest;
-static void GCC_FMT_ATTR(2, 3) blkverify_err(BlkverifyAIOCB *acb,
+static void GCC_FMT_ATTR(2, 3) blkverify_err(BlkverifyRequest *r,
const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
- fprintf(stderr, "blkverify: %s sector_num=%" PRId64 " nb_sectors=%d ",
- acb->is_write ? "write" : "read", acb->sector_num,
- acb->nb_sectors);
+ fprintf(stderr, "blkverify: %s offset=%" PRId64 " bytes=%" PRId64 " ",
+ r->is_write ? "write" : "read", r->offset, r->bytes);
vfprintf(stderr, fmt, ap);
fprintf(stderr, "\n");
va_end(ap);
@@ -166,113 +164,106 @@ static int64_t blkverify_getlength(BlockDriverState *bs)
return bdrv_getlength(s->test_file->bs);
}
-static BlkverifyAIOCB *blkverify_aio_get(BlockDriverState *bs, bool is_write,
- int64_t sector_num, QEMUIOVector
*qiov,
- int nb_sectors,
- BlockCompletionFunc *cb,
- void *opaque)
+static void coroutine_fn blkverify_do_test_req(void *opaque)
{
- BlkverifyAIOCB *acb = qemu_aio_get(&blkverify_aiocb_info, bs, cb, opaque);
-
- acb->is_write = is_write;
- acb->sector_num = sector_num;
- acb->nb_sectors = nb_sectors;
- acb->ret = -EINPROGRESS;
- acb->done = 0;
- acb->qiov = qiov;
- acb->buf = NULL;
- acb->verify = NULL;
- return acb;
+ BlkverifyRequest *r = opaque;
+ BDRVBlkverifyState *s = r->bs->opaque;
+
+ r->ret = r->request_fn(s->test_file, r->offset, r->bytes, r->qiov,
+ r->flags);
+ r->done++;
+ qemu_coroutine_enter_if_inactive(r->co);
}
-static void blkverify_aio_bh(void *opaque)
+static void coroutine_fn blkverify_do_raw_req(void *opaque)
{
- BlkverifyAIOCB *acb = opaque;
+ BlkverifyRequest *r = opaque;
- if (acb->buf) {
- qemu_iovec_destroy(&acb->raw_qiov);
- qemu_vfree(acb->buf);
- }
- acb->common.cb(acb->common.opaque, acb->ret);
- qemu_aio_unref(acb);
+ r->raw_ret = r->request_fn(r->bs->file, r->offset, r->bytes, r->raw_qiov,
+ r->flags);
+ r->done++;
+ qemu_coroutine_enter_if_inactive(r->co);
}
-static void blkverify_aio_cb(void *opaque, int ret)
+static int coroutine_fn
+blkverify_co_prwv(BlockDriverState *bs, BlkverifyRequest *r, uint64_t offset,
+ uint64_t bytes, QEMUIOVector *qiov, QEMUIOVector *raw_qiov,
+ int flags, bool is_write)
{
- BlkverifyAIOCB *acb = opaque;
-
- switch (++acb->done) {
- case 1:
- acb->ret = ret;
- break;
-
- case 2:
- if (acb->ret != ret) {
- blkverify_err(acb, "return value mismatch %d != %d", acb->ret,
ret);
- }
-
- if (acb->verify) {
- acb->verify(acb);
- }
+ Coroutine *co_a, *co_b;
+
+ *r = (BlkverifyRequest) {
+ .co = qemu_coroutine_self(),
+ .bs = bs,
+ .offset = offset,
+ .bytes = bytes,
+ .qiov = qiov,
+ .raw_qiov = raw_qiov,
+ .flags = flags,
+ .is_write = is_write,
+ .request_fn = is_write ? bdrv_co_pwritev : bdrv_co_preadv,
+ };
+
+ co_a = qemu_coroutine_create(blkverify_do_test_req, r);
+ co_b = qemu_coroutine_create(blkverify_do_raw_req, r);
+
+ qemu_coroutine_enter(co_a);
+ qemu_coroutine_enter(co_b);
+
+ while (r->done < 2) {
+ qemu_coroutine_yield();
+ }
- aio_bh_schedule_oneshot(bdrv_get_aio_context(acb->common.bs),
- blkverify_aio_bh, acb);
- break;
+ if (r->ret != r->raw_ret) {
+ blkverify_err(r, "return value mismatch %d != %d", r->ret, r->raw_ret);
}
+
+ return r->ret;
}
-static void blkverify_verify_readv(BlkverifyAIOCB *acb)
+static int coroutine_fn
+blkverify_co_preadv(BlockDriverState *bs, uint64_t offset, uint64_t bytes,
+ QEMUIOVector *qiov, int flags)
{
- ssize_t offset = qemu_iovec_compare(acb->qiov, &acb->raw_qiov);
- if (offset != -1) {
- blkverify_err(acb, "contents mismatch in sector %" PRId64,
- acb->sector_num + (int64_t)(offset / BDRV_SECTOR_SIZE));
+ BlkverifyRequest r;
+ QEMUIOVector raw_qiov;
+ void *buf;
+ ssize_t cmp_offset;
+ int ret;
+
+ buf = qemu_blockalign(bs->file->bs, qiov->size);
+ qemu_iovec_init(&raw_qiov, qiov->niov);
+ qemu_iovec_clone(&raw_qiov, qiov, buf);
+
+ ret = blkverify_co_prwv(bs, &r, offset, bytes, qiov, &raw_qiov, flags,
+ false);
+
+ cmp_offset = qemu_iovec_compare(qiov, &raw_qiov);
+ if (cmp_offset != -1) {
+ blkverify_err(&r, "contents mismatch at offset %" PRId64,
+ offset + cmp_offset);
}
-}
-static BlockAIOCB *blkverify_aio_readv(BlockDriverState *bs,
- int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
- BlockCompletionFunc *cb, void *opaque)
-{
- BDRVBlkverifyState *s = bs->opaque;
- BlkverifyAIOCB *acb = blkverify_aio_get(bs, false, sector_num, qiov,
- nb_sectors, cb, opaque);
-
- acb->verify = blkverify_verify_readv;
- acb->buf = qemu_blockalign(bs->file->bs, qiov->size);
- qemu_iovec_init(&acb->raw_qiov, acb->qiov->niov);
- qemu_iovec_clone(&acb->raw_qiov, qiov, acb->buf);
-
- bdrv_aio_readv(s->test_file, sector_num, qiov, nb_sectors,
- blkverify_aio_cb, acb);
- bdrv_aio_readv(bs->file, sector_num, &acb->raw_qiov, nb_sectors,
- blkverify_aio_cb, acb);
- return &acb->common;
+ qemu_iovec_destroy(&raw_qiov);
+ qemu_vfree(buf);
+
+ return ret;
}
-static BlockAIOCB *blkverify_aio_writev(BlockDriverState *bs,
- int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
- BlockCompletionFunc *cb, void *opaque)
+static int coroutine_fn
+blkverify_co_pwritev(BlockDriverState *bs, uint64_t offset, uint64_t bytes,
+ QEMUIOVector *qiov, int flags)
{
- BDRVBlkverifyState *s = bs->opaque;
- BlkverifyAIOCB *acb = blkverify_aio_get(bs, true, sector_num, qiov,
- nb_sectors, cb, opaque);
-
- bdrv_aio_writev(s->test_file, sector_num, qiov, nb_sectors,
- blkverify_aio_cb, acb);
- bdrv_aio_writev(bs->file, sector_num, qiov, nb_sectors,
- blkverify_aio_cb, acb);
- return &acb->common;
+ BlkverifyRequest r;
+ return blkverify_co_prwv(bs, &r, offset, bytes, qiov, qiov, flags, true);
}
-static BlockAIOCB *blkverify_aio_flush(BlockDriverState *bs,
- BlockCompletionFunc *cb,
- void *opaque)
+static int blkverify_co_flush(BlockDriverState *bs)
{
BDRVBlkverifyState *s = bs->opaque;
/* Only flush test file, the raw file is not important */
- return bdrv_aio_flush(s->test_file->bs, cb, opaque);
+ return bdrv_co_flush(s->test_file->bs);
}
static bool blkverify_recurse_is_first_non_filter(BlockDriverState *bs,
@@ -332,9 +323,9 @@ static BlockDriver bdrv_blkverify = {
.bdrv_getlength = blkverify_getlength,
.bdrv_refresh_filename = blkverify_refresh_filename,
- .bdrv_aio_readv = blkverify_aio_readv,
- .bdrv_aio_writev = blkverify_aio_writev,
- .bdrv_aio_flush = blkverify_aio_flush,
+ .bdrv_co_preadv = blkverify_co_preadv,
+ .bdrv_co_pwritev = blkverify_co_pwritev,
+ .bdrv_co_flush = blkverify_co_flush,
.is_filter = true,
.bdrv_recurse_is_first_non_filter = blkverify_recurse_is_first_non_filter,
diff --git a/tests/qemu-iotests/071.out b/tests/qemu-iotests/071.out
index 8ff423f..dd879f1 100644
--- a/tests/qemu-iotests/071.out
+++ b/tests/qemu-iotests/071.out
@@ -12,7 +12,7 @@ read 512/512 bytes at offset 229376
512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
wrote 512/512 bytes at offset 0
512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-blkverify: read sector_num=0 nb_sectors=1 contents mismatch in sector 0
+blkverify: read offset=0 bytes=512 contents mismatch at offset 0
=== Testing blkverify through file blockref ===
@@ -26,7 +26,7 @@ read 512/512 bytes at offset 229376
512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
wrote 512/512 bytes at offset 0
512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-blkverify: read sector_num=0 nb_sectors=1 contents mismatch in sector 0
+blkverify: read offset=0 bytes=512 contents mismatch at offset 0
=== Testing blkdebug through filename ===
@@ -56,7 +56,7 @@ QMP_VERSION
{"return": {}}
{"return": {}}
{"return": {}}
-blkverify: read sector_num=0 nb_sectors=1 contents mismatch in sector 0
+blkverify: read offset=0 bytes=512 contents mismatch at offset 0
=== Testing blkverify on existing raw block device ===
@@ -66,7 +66,7 @@ QMP_VERSION
{"return": {}}
{"return": {}}
{"return": {}}
-blkverify: read sector_num=0 nb_sectors=1 contents mismatch in sector 0
+blkverify: read offset=0 bytes=512 contents mismatch at offset 0
=== Testing blkdebug's set-state through QMP ===
--
1.8.3.1
