block: Remove bdrv_aio_readv/writev/flush()
These functions are unused now. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Kevin Wolf
parent
0f714ec706
commit
c5f1ad429c
171
block/io.c
171
block/io.c
@ -34,14 +34,6 @@
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#define NOT_DONE 0x7fffffff /* used while emulated sync operation in progress */
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static BlockAIOCB *bdrv_co_aio_prw_vector(BdrvChild *child,
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int64_t offset,
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QEMUIOVector *qiov,
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BdrvRequestFlags flags,
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BlockCompletionFunc *cb,
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void *opaque,
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bool is_write);
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static void coroutine_fn bdrv_co_do_rw(void *opaque);
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static int coroutine_fn bdrv_co_do_pwrite_zeroes(BlockDriverState *bs,
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int64_t offset, int count, BdrvRequestFlags flags);
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@ -2080,28 +2072,6 @@ int bdrv_readv_vmstate(BlockDriverState *bs, QEMUIOVector *qiov, int64_t pos)
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/**************************************************************/
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/* async I/Os */
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BlockAIOCB *bdrv_aio_readv(BdrvChild *child, int64_t sector_num,
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QEMUIOVector *qiov, int nb_sectors,
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BlockCompletionFunc *cb, void *opaque)
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{
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trace_bdrv_aio_readv(child->bs, sector_num, nb_sectors, opaque);
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assert(nb_sectors << BDRV_SECTOR_BITS == qiov->size);
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return bdrv_co_aio_prw_vector(child, sector_num << BDRV_SECTOR_BITS, qiov,
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0, cb, opaque, false);
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}
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BlockAIOCB *bdrv_aio_writev(BdrvChild *child, int64_t sector_num,
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QEMUIOVector *qiov, int nb_sectors,
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BlockCompletionFunc *cb, void *opaque)
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{
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trace_bdrv_aio_writev(child->bs, sector_num, nb_sectors, opaque);
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assert(nb_sectors << BDRV_SECTOR_BITS == qiov->size);
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return bdrv_co_aio_prw_vector(child, sector_num << BDRV_SECTOR_BITS, qiov,
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0, cb, opaque, true);
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}
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void bdrv_aio_cancel(BlockAIOCB *acb)
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{
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qemu_aio_ref(acb);
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@ -2133,147 +2103,6 @@ void bdrv_aio_cancel_async(BlockAIOCB *acb)
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}
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}
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/**************************************************************/
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/* async block device emulation */
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typedef struct BlockRequest {
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union {
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/* Used during read, write, trim */
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struct {
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int64_t offset;
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int bytes;
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int flags;
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QEMUIOVector *qiov;
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};
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/* Used during ioctl */
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struct {
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int req;
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void *buf;
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};
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};
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BlockCompletionFunc *cb;
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void *opaque;
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int error;
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} BlockRequest;
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typedef struct BlockAIOCBCoroutine {
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BlockAIOCB common;
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BdrvChild *child;
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BlockRequest req;
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bool is_write;
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bool need_bh;
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bool *done;
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} BlockAIOCBCoroutine;
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static const AIOCBInfo bdrv_em_co_aiocb_info = {
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.aiocb_size = sizeof(BlockAIOCBCoroutine),
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};
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static void bdrv_co_complete(BlockAIOCBCoroutine *acb)
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{
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if (!acb->need_bh) {
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bdrv_dec_in_flight(acb->common.bs);
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acb->common.cb(acb->common.opaque, acb->req.error);
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qemu_aio_unref(acb);
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}
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}
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static void bdrv_co_em_bh(void *opaque)
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{
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BlockAIOCBCoroutine *acb = opaque;
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assert(!acb->need_bh);
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bdrv_co_complete(acb);
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}
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static void bdrv_co_maybe_schedule_bh(BlockAIOCBCoroutine *acb)
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{
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acb->need_bh = false;
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if (acb->req.error != -EINPROGRESS) {
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BlockDriverState *bs = acb->common.bs;
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aio_bh_schedule_oneshot(bdrv_get_aio_context(bs), bdrv_co_em_bh, acb);
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}
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}
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/* Invoke bdrv_co_do_readv/bdrv_co_do_writev */
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static void coroutine_fn bdrv_co_do_rw(void *opaque)
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{
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BlockAIOCBCoroutine *acb = opaque;
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if (!acb->is_write) {
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acb->req.error = bdrv_co_preadv(acb->child, acb->req.offset,
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acb->req.qiov->size, acb->req.qiov, acb->req.flags);
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} else {
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acb->req.error = bdrv_co_pwritev(acb->child, acb->req.offset,
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acb->req.qiov->size, acb->req.qiov, acb->req.flags);
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}
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bdrv_co_complete(acb);
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}
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static BlockAIOCB *bdrv_co_aio_prw_vector(BdrvChild *child,
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int64_t offset,
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QEMUIOVector *qiov,
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BdrvRequestFlags flags,
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BlockCompletionFunc *cb,
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void *opaque,
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bool is_write)
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{
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Coroutine *co;
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BlockAIOCBCoroutine *acb;
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/* Matched by bdrv_co_complete's bdrv_dec_in_flight. */
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bdrv_inc_in_flight(child->bs);
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acb = qemu_aio_get(&bdrv_em_co_aiocb_info, child->bs, cb, opaque);
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acb->child = child;
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acb->need_bh = true;
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acb->req.error = -EINPROGRESS;
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acb->req.offset = offset;
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acb->req.qiov = qiov;
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acb->req.flags = flags;
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acb->is_write = is_write;
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co = qemu_coroutine_create(bdrv_co_do_rw, acb);
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bdrv_coroutine_enter(child->bs, co);
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bdrv_co_maybe_schedule_bh(acb);
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return &acb->common;
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}
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static void coroutine_fn bdrv_aio_flush_co_entry(void *opaque)
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{
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BlockAIOCBCoroutine *acb = opaque;
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BlockDriverState *bs = acb->common.bs;
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acb->req.error = bdrv_co_flush(bs);
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bdrv_co_complete(acb);
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}
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BlockAIOCB *bdrv_aio_flush(BlockDriverState *bs,
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BlockCompletionFunc *cb, void *opaque)
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{
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trace_bdrv_aio_flush(bs, opaque);
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Coroutine *co;
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BlockAIOCBCoroutine *acb;
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/* Matched by bdrv_co_complete's bdrv_dec_in_flight. */
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bdrv_inc_in_flight(bs);
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acb = qemu_aio_get(&bdrv_em_co_aiocb_info, bs, cb, opaque);
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acb->need_bh = true;
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acb->req.error = -EINPROGRESS;
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co = qemu_coroutine_create(bdrv_aio_flush_co_entry, acb);
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bdrv_coroutine_enter(bs, co);
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bdrv_co_maybe_schedule_bh(acb);
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return &acb->common;
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}
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/**************************************************************/
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/* Coroutine block device emulation */
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@ -9,9 +9,6 @@ blk_co_preadv(void *blk, void *bs, int64_t offset, unsigned int bytes, int flags
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blk_co_pwritev(void *blk, void *bs, int64_t offset, unsigned int bytes, int flags) "blk %p bs %p offset %"PRId64" bytes %u flags %x"
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# block/io.c
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bdrv_aio_flush(void *bs, void *opaque) "bs %p opaque %p"
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bdrv_aio_readv(void *bs, int64_t sector_num, int nb_sectors, void *opaque) "bs %p sector_num %"PRId64" nb_sectors %d opaque %p"
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bdrv_aio_writev(void *bs, int64_t sector_num, int nb_sectors, void *opaque) "bs %p sector_num %"PRId64" nb_sectors %d opaque %p"
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bdrv_co_readv(void *bs, int64_t sector_num, int nb_sector) "bs %p sector_num %"PRId64" nb_sectors %d"
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bdrv_co_writev(void *bs, int64_t sector_num, int nb_sector) "bs %p sector_num %"PRId64" nb_sectors %d"
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bdrv_co_pwrite_zeroes(void *bs, int64_t offset, int count, int flags) "bs %p offset %"PRId64" count %d flags %#x"
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@ -353,14 +353,6 @@ BlockDriverState *check_to_replace_node(BlockDriverState *parent_bs,
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const char *node_name, Error **errp);
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/* async block I/O */
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BlockAIOCB *bdrv_aio_readv(BdrvChild *child, int64_t sector_num,
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QEMUIOVector *iov, int nb_sectors,
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BlockCompletionFunc *cb, void *opaque);
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BlockAIOCB *bdrv_aio_writev(BdrvChild *child, int64_t sector_num,
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QEMUIOVector *iov, int nb_sectors,
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BlockCompletionFunc *cb, void *opaque);
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BlockAIOCB *bdrv_aio_flush(BlockDriverState *bs,
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BlockCompletionFunc *cb, void *opaque);
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void bdrv_aio_cancel(BlockAIOCB *acb);
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void bdrv_aio_cancel_async(BlockAIOCB *acb);
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