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selftests/net: reap zerocopy completions passed up as ancillary data. 

PF_RDS sockets pass up cookies for zerocopy completion as ancillary
data. Update msg_zerocopy to reap this information.

Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Acked-by: Willem de Bruijn <willemb@google.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Sowmini Varadhan 2018-02-27 09:52:44 -08:00 committed by David S. Miller
parent 401910db4c
commit 6f3899e602
1 changed files with 57 additions and 8 deletions
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65
tools/testing/selftests/net/msg_zerocopy.c
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@ -344,7 +344,53 @@ static int do_setup_tx(int domain, int type, int protocol)
return fd;
}
static bool do_recv_completion(int fd)
static uint32_t do_process_zerocopy_cookies(struct rds_zcopy_cookies *ck)
{
int i;
if (ck->num > RDS_MAX_ZCOOKIES)
error(1, 0, "Returned %d cookies, max expected %d\n",
ck->num, RDS_MAX_ZCOOKIES);
for (i = 0; i < ck->num; i++)
if (cfg_verbose >= 2)
fprintf(stderr, "%d\n", ck->cookies[i]);
return ck->num;
}
static bool do_recvmsg_completion(int fd)
{
char cmsgbuf[CMSG_SPACE(sizeof(struct rds_zcopy_cookies))];
struct rds_zcopy_cookies *ck;
struct cmsghdr *cmsg;
struct msghdr msg;
bool ret = false;
memset(&msg, 0, sizeof(msg));
msg.msg_control = cmsgbuf;
msg.msg_controllen = sizeof(cmsgbuf);
if (recvmsg(fd, &msg, MSG_DONTWAIT))
return ret;
if (msg.msg_flags & MSG_CTRUNC)
error(1, errno, "recvmsg notification: truncated");
for (cmsg = CMSG_FIRSTHDR(&msg); cmsg; cmsg = CMSG_NXTHDR(&msg, cmsg)) {
if (cmsg->cmsg_level == SOL_RDS &&
cmsg->cmsg_type == RDS_CMSG_ZCOPY_COMPLETION) {
ck = (struct rds_zcopy_cookies *)CMSG_DATA(cmsg);
completions += do_process_zerocopy_cookies(ck);
ret = true;
break;
}
error(0, 0, "ignoring cmsg at level %d type %d\n",
cmsg->cmsg_level, cmsg->cmsg_type);
}
return ret;
}
static bool do_recv_completion(int fd, int domain)
{
struct sock_extended_err *serr;
struct msghdr msg = {};
@ -353,6 +399,9 @@ static bool do_recv_completion(int fd)
int ret, zerocopy;
char control[100];
if (domain == PF_RDS)
return do_recvmsg_completion(fd);
msg.msg_control = control;
msg.msg_controllen = sizeof(control);
@ -409,20 +458,20 @@ static bool do_recv_completion(int fd)
}
/* Read all outstanding messages on the errqueue */
static void do_recv_completions(int fd)
static void do_recv_completions(int fd, int domain)
{
while (do_recv_completion(fd)) {}
while (do_recv_completion(fd, domain)) {}
}
/* Wait for all remaining completions on the errqueue */
static void do_recv_remaining_completions(int fd)
static void do_recv_remaining_completions(int fd, int domain)
{
int64_t tstop = gettimeofday_ms() + cfg_waittime_ms;
while (completions < expected_completions &&
gettimeofday_ms() < tstop) {
if (do_poll(fd, POLLERR))
do_recv_completions(fd);
if (do_poll(fd, domain == PF_RDS ? POLLIN : POLLERR))
do_recv_completions(fd, domain);
}
if (completions < expected_completions)
@ -503,13 +552,13 @@ static void do_tx(int domain, int type, int protocol)
while (!do_poll(fd, POLLOUT)) {
if (cfg_zerocopy)
do_recv_completions(fd);
do_recv_completions(fd, domain);
}
} while (gettimeofday_ms() < tstop);
if (cfg_zerocopy)
do_recv_remaining_completions(fd);
do_recv_remaining_completions(fd, domain);
if (close(fd))
error(1, errno, "close");