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sock: Fix return value of spdk_sock_group_poll to return number of events

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spdk_sock_group_poll() and spdk_sock_group_poll_count() had returned
0 on success. The implementation didn't match the specification
described in the header file, and couldn't be used to collect stats
correctly because 0 means idle.

This patch fixes the return value of spdk_sock_group_poll() and
spdk_sock_group_poll_count() to return number of events and
the callers not to overwrite the return value by 0.

Signed-off-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Change-Id: I7e2a17187fc74ea44d3acf2f35d63f5e5a254eda
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/463710
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
This commit is contained in:
Shuhei Matsumoto 2019-07-31 11:08:30 +09:00 committed by Changpeng Liu
parent 5a8033a5f3
commit cf95d4a24f
5 changed files with 15 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
include/spdk/sock.h
View File

@ -249,7 +249,7 @@ int spdk_sock_group_remove_sock(struct spdk_sock_group *group, struct spdk_sock
*
* \param group Group to poll.
*
* \return 0 on success, -1 on failure.
* \return the number of events on success, -1 on failure.
*/
int spdk_sock_group_poll(struct spdk_sock_group *group);

2
lib/iscsi/iscsi_subsystem.c
View File

@ -1177,7 +1177,7 @@ iscsi_poll_group_poll(void *ctx)
}
}
return -1;
return rc;
}
static int

3
lib/nvmf/tcp.c
View File

@ -2776,10 +2776,9 @@ spdk_nvmf_tcp_poll_group_poll(struct spdk_nvmf_transport_poll_group *group)
rc = spdk_sock_group_poll(tgroup->sock_group);
if (rc < 0) {
SPDK_ERRLOG("Failed to poll sock_group=%p\n", tgroup->sock_group);
return rc;
}
return 0;
return rc;
}
static int

12
lib/sock/sock.c
View File

@ -456,14 +456,14 @@ spdk_sock_group_impl_poll_count(struct spdk_sock_group_impl *group_impl,
assert(sock->cb_fn != NULL);
sock->cb_fn(sock->cb_arg, group, sock);
}
return 0;
return num_events;
}
int
spdk_sock_group_poll_count(struct spdk_sock_group *group, int max_events)
{
struct spdk_sock_group_impl *group_impl = NULL;
int rc, final_rc = 0;
int rc, num_events = 0;
if (max_events < 1) {
errno = -EINVAL;
@ -480,14 +480,16 @@ spdk_sock_group_poll_count(struct spdk_sock_group *group, int max_events)
STAILQ_FOREACH_FROM(group_impl, &group->group_impls, link) {
rc = spdk_sock_group_impl_poll_count(group_impl, group, max_events);
if (rc != 0) {
final_rc = rc;
if (rc < 0) {
num_events = -1;
SPDK_ERRLOG("group_impl_poll_count for net(%s) failed\n",
group_impl->net_impl->name);
} else if (num_events >= 0) {
num_events += rc;
}
}
return final_rc;
return num_events;
}
int

10
test/unit/lib/sock/sock.c/sock_ut.c
View File

@ -510,7 +510,7 @@ _sock_group(const char *ip, int port)
g_bytes_read = 0;
rc = spdk_sock_group_poll(group);
CU_ASSERT(rc == 0);
CU_ASSERT(rc == 1);
CU_ASSERT(g_read_data_called == true);
CU_ASSERT(g_bytes_read == 7);
@ -621,7 +621,7 @@ posix_sock_group_fairness(void)
*/
g_server_sock_read = NULL;
rc = spdk_sock_group_poll_count(group, 1);
CU_ASSERT(rc == 0);
CU_ASSERT(rc == 1);
CU_ASSERT(g_server_sock_read == server_sock[0]);
/*
@ -636,17 +636,17 @@ posix_sock_group_fairness(void)
g_server_sock_read = NULL;
rc = spdk_sock_group_poll_count(group, 1);
CU_ASSERT(rc == 0);
CU_ASSERT(rc == 1);
CU_ASSERT(g_server_sock_read == server_sock[1]);
g_server_sock_read = NULL;
rc = spdk_sock_group_poll_count(group, 1);
CU_ASSERT(rc == 0);
CU_ASSERT(rc == 1);
CU_ASSERT(g_server_sock_read == server_sock[2]);
g_server_sock_read = NULL;
rc = spdk_sock_group_poll_count(group, 1);
CU_ASSERT(rc == 0);
CU_ASSERT(rc == 1);
CU_ASSERT(g_server_sock_read == server_sock[0]);
for (i = 0; i < 3; i++) {