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sheepdog: add queue_lock 

Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20170629132749.997-11-pbonzini@redhat.com>
Signed-off-by: Fam Zheng <famz@redhat.com>
This commit is contained in:
Paolo Bonzini 2017-06-29 15:27:48 +02:00 committed by Fam Zheng
parent 1f01e50b83
commit f1af3251f8
1 changed files with 19 additions and 2 deletions
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21
block/sheepdog.c
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@ -390,6 +390,7 @@ struct BDRVSheepdogState {
QLIST_HEAD(inflight_aio_head, AIOReq) inflight_aio_head;
QLIST_HEAD(failed_aio_head, AIOReq) failed_aio_head;
CoMutex queue_lock;
CoQueue overlapping_queue;
QLIST_HEAD(inflight_aiocb_head, SheepdogAIOCB) inflight_aiocb_head;
};
@ -488,7 +489,7 @@ static void wait_for_overlapping_aiocb(BDRVSheepdogState *s, SheepdogAIOCB *acb)
retry:
QLIST_FOREACH(cb, &s->inflight_aiocb_head, aiocb_siblings) {
if (AIOCBOverlapping(acb, cb)) {
qemu_co_queue_wait(&s->overlapping_queue, NULL);
qemu_co_queue_wait(&s->overlapping_queue, &s->queue_lock);
goto retry;
}
}
@ -525,8 +526,10 @@ static void sd_aio_setup(SheepdogAIOCB *acb, BDRVSheepdogState *s,
return;
}
qemu_co_mutex_lock(&s->queue_lock);
wait_for_overlapping_aiocb(s, acb);
QLIST_INSERT_HEAD(&s->inflight_aiocb_head, acb, aiocb_siblings);
qemu_co_mutex_unlock(&s->queue_lock);
}
static SocketAddress *sd_socket_address(const char *path,
@ -785,6 +788,7 @@ static coroutine_fn void reconnect_to_sdog(void *opaque)
* have to move all the inflight requests to the failed queue before
* resend_aioreq() is called.
*/
qemu_co_mutex_lock(&s->queue_lock);
QLIST_FOREACH_SAFE(aio_req, &s->inflight_aio_head, aio_siblings, next) {
QLIST_REMOVE(aio_req, aio_siblings);
QLIST_INSERT_HEAD(&s->failed_aio_head, aio_req, aio_siblings);
@ -794,8 +798,11 @@ static coroutine_fn void reconnect_to_sdog(void *opaque)
while (!QLIST_EMPTY(&s->failed_aio_head)) {
aio_req = QLIST_FIRST(&s->failed_aio_head);
QLIST_REMOVE(aio_req, aio_siblings);
qemu_co_mutex_unlock(&s->queue_lock);
resend_aioreq(s, aio_req);
qemu_co_mutex_lock(&s->queue_lock);
}
qemu_co_mutex_unlock(&s->queue_lock);
}
/*
@ -887,7 +894,10 @@ static void coroutine_fn aio_read_response(void *opaque)
*/
s->co_recv = NULL;
qemu_co_mutex_lock(&s->queue_lock);
QLIST_REMOVE(aio_req, aio_siblings);
qemu_co_mutex_unlock(&s->queue_lock);
switch (rsp.result) {
case SD_RES_SUCCESS:
break;
@ -1307,7 +1317,9 @@ static void coroutine_fn add_aio_request(BDRVSheepdogState *s, AIOReq *aio_req,
uint64_t old_oid = aio_req->base_oid;
bool create = aio_req->create;
qemu_co_mutex_lock(&s->queue_lock);
QLIST_INSERT_HEAD(&s->inflight_aio_head, aio_req, aio_siblings);
qemu_co_mutex_unlock(&s->queue_lock);
if (!nr_copies) {
error_report("bug");
@ -1678,6 +1690,7 @@ static int sd_open(BlockDriverState *bs, QDict *options, int flags,
bs->total_sectors = s->inode.vdi_size / BDRV_SECTOR_SIZE;
pstrcpy(s->name, sizeof(s->name), vdi);
qemu_co_mutex_init(&s->lock);
qemu_co_mutex_init(&s->queue_lock);
qemu_co_queue_init(&s->overlapping_queue);
qemu_opts_del(opts);
g_free(buf);
@ -2438,12 +2451,16 @@ static void coroutine_fn sd_co_rw_vector(SheepdogAIOCB *acb)
static void sd_aio_complete(SheepdogAIOCB *acb)
{
BDRVSheepdogState *s;
if (acb->aiocb_type == AIOCB_FLUSH_CACHE) {
return;
}
s = acb->s;
qemu_co_mutex_lock(&s->queue_lock);
QLIST_REMOVE(acb, aiocb_siblings);
qemu_co_queue_restart_all(&acb->s->overlapping_queue);
qemu_co_queue_restart_all(&s->overlapping_queue);
qemu_co_mutex_unlock(&s->queue_lock);
}
static coroutine_fn int sd_co_writev(BlockDriverState *bs, int64_t sector_num,