diff options
author | Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> | 2012-08-20 10:28:53 +0100 |
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committer | Stefan Hajnoczi <stefanha@gmail.com> | 2012-09-14 08:40:33 +0100 |
commit | 213fd5087e2e4e2da10ad266df0ba950cf7618bf (patch) | |
tree | 1bd584820c5e335b2d23921794a23b2fcd53a7bb | |
parent | 863f678fba4191f3b695620f41056cb7c124425d (diff) |
net: EAGAIN handling for net/socket.c UDP
Implement asynchronous send for UDP (or other SOCK_DGRAM) sockets. If
send fails with EAGAIN we wait for the socket to become writable again.
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
-rw-r--r-- | net/socket.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/net/socket.c b/net/socket.c index 7bff5367ac..aabf0a48c5 100644 --- a/net/socket.c +++ b/net/socket.c @@ -102,9 +102,19 @@ static ssize_t net_socket_receive(NetClientState *nc, const uint8_t *buf, size_t static ssize_t net_socket_receive_dgram(NetClientState *nc, const uint8_t *buf, size_t size) { NetSocketState *s = DO_UPCAST(NetSocketState, nc, nc); + ssize_t ret; - return sendto(s->fd, (const void *)buf, size, 0, - (struct sockaddr *)&s->dgram_dst, sizeof(s->dgram_dst)); + do { + ret = sendto(s->fd, buf, size, 0, + (struct sockaddr *)&s->dgram_dst, + sizeof(s->dgram_dst)); + } while (ret == -1 && errno == EINTR); + + if (ret == -1 && errno == EAGAIN) { + net_socket_write_poll(s, true); + return 0; + } + return ret; } static void net_socket_send(void *opaque) |