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nbd/server.c: add coroutine_fn annotations 

These functions end up calling bdrv_*() implemented as generated_co_wrapper
functions.
In addition, they also happen to be always called in coroutine context,
meaning all callers are coroutine_fn.
This means that the g_c_w function will enter the qemu_in_coroutine()
case and eventually suspend (or in other words call qemu_coroutine_yield()).
Therefore we can mark such functions coroutine_fn too.

Signed-off-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
Message-Id: <20221128142337.657646-4-eesposit@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Emanuele Giuseppe Esposito 2022-11-28 09:23:26 -05:00 committed by Kevin Wolf
parent 43a0d4f08b
commit 6f58ac5539
1 changed files with 16 additions and 13 deletions
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29
nbd/server.c
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@ -2138,14 +2138,15 @@ static int nbd_extent_array_add(NBDExtentArray *ea,
return 0;
}
static int blockstatus_to_extents(BlockDriverState *bs, uint64_t offset,
uint64_t bytes, NBDExtentArray *ea)
static int coroutine_fn blockstatus_to_extents(BlockDriverState *bs,
uint64_t offset, uint64_t bytes,
NBDExtentArray *ea)
{
while (bytes) {
uint32_t flags;
int64_t num;
int ret = bdrv_block_status_above(bs, NULL, offset, bytes, &num,
NULL, NULL);
int ret = bdrv_co_block_status_above(bs, NULL, offset, bytes, &num,
NULL, NULL);
if (ret < 0) {
return ret;
@ -2165,13 +2166,14 @@ static int blockstatus_to_extents(BlockDriverState *bs, uint64_t offset,
return 0;
}
static int blockalloc_to_extents(BlockDriverState *bs, uint64_t offset,
uint64_t bytes, NBDExtentArray *ea)
static int coroutine_fn blockalloc_to_extents(BlockDriverState *bs,
uint64_t offset, uint64_t bytes,
NBDExtentArray *ea)
{
while (bytes) {
int64_t num;
int ret = bdrv_is_allocated_above(bs, NULL, false, offset, bytes,
&num);
int ret = bdrv_co_is_allocated_above(bs, NULL, false, offset, bytes,
&num);
if (ret < 0) {
return ret;
@ -2217,11 +2219,12 @@ static int nbd_co_send_extents(NBDClient *client, uint64_t handle,
}
/* Get block status from the exported device and send it to the client */
static int nbd_co_send_block_status(NBDClient *client, uint64_t handle,
BlockDriverState *bs, uint64_t offset,
uint32_t length, bool dont_fragment,
bool last, uint32_t context_id,
Error **errp)
static int
coroutine_fn nbd_co_send_block_status(NBDClient *client, uint64_t handle,
BlockDriverState *bs, uint64_t offset,
uint32_t length, bool dont_fragment,
bool last, uint32_t context_id,
Error **errp)
{
int ret;
unsigned int nb_extents = dont_fragment ? 1 : NBD_MAX_BLOCK_STATUS_EXTENTS;