#include <fcntl.h>
#include <string.h>
#include <errno.h>
+#include <poll.h>
#include <rte_log.h>
#define RTE_LOGTYPE_GUEST_CHANNEL RTE_LOGTYPE_USER1
-static int global_fds[RTE_MAX_LCORE];
+/* Timeout for incoming message in milliseconds. */
+#define TIMEOUT 10
+
+static int global_fds[RTE_MAX_LCORE] = { [0 ... RTE_MAX_LCORE-1] = -1 };
int
guest_channel_host_connect(const char *path, unsigned int lcore_id)
return -1;
}
/* check if path is already open */
- if (global_fds[lcore_id] != 0) {
+ if (global_fds[lcore_id] != -1) {
RTE_LOG(ERR, GUEST_CHANNEL, "Channel(%u) is already open with fd %d\n",
lcore_id, global_fds[lcore_id]);
return -1;
return 0;
error:
close(fd);
- global_fds[lcore_id] = 0;
+ global_fds[lcore_id] = -1;
return -1;
}
return -1;
}
- if (global_fds[lcore_id] == 0) {
+ if (global_fds[lcore_id] < 0) {
RTE_LOG(ERR, GUEST_CHANNEL, "Channel is not connected\n");
return -1;
}
return guest_channel_send_msg(pkt, lcore_id);
}
+int power_guest_channel_read_msg(void *pkt,
+ size_t pkt_len,
+ unsigned int lcore_id)
+{
+ int ret;
+ struct pollfd fds;
+
+ if (pkt_len == 0 || pkt == NULL)
+ return -1;
+
+ fds.fd = global_fds[lcore_id];
+ fds.events = POLLIN;
+
+ ret = poll(&fds, 1, TIMEOUT);
+ if (ret == 0) {
+ RTE_LOG(DEBUG, GUEST_CHANNEL, "Timeout occurred during poll function.\n");
+ return -1;
+ } else if (ret < 0) {
+ RTE_LOG(ERR, GUEST_CHANNEL, "Error occurred during poll function: %s\n",
+ strerror(errno));
+ return -1;
+ }
+
+ if (lcore_id >= RTE_MAX_LCORE) {
+ RTE_LOG(ERR, GUEST_CHANNEL, "Channel(%u) is out of range 0...%d\n",
+ lcore_id, RTE_MAX_LCORE-1);
+ return -1;
+ }
+
+ if (global_fds[lcore_id] < 0) {
+ RTE_LOG(ERR, GUEST_CHANNEL, "Channel is not connected\n");
+ return -1;
+ }
+
+ while (pkt_len > 0) {
+ ret = read(global_fds[lcore_id],
+ pkt, pkt_len);
+
+ if (ret < 0) {
+ if (errno == EINTR)
+ continue;
+ return -1;
+ }
+
+ if (ret == 0) {
+ RTE_LOG(ERR, GUEST_CHANNEL, "Expected more data, but connection has been closed.\n");
+ return -1;
+ }
+ pkt = (char *)pkt + ret;
+ pkt_len -= ret;
+ }
+
+ return 0;
+}
+
+int rte_power_guest_channel_receive_msg(void *pkt,
+ size_t pkt_len,
+ unsigned int lcore_id)
+{
+ return power_guest_channel_read_msg(pkt, pkt_len, lcore_id);
+}
void
guest_channel_host_disconnect(unsigned int lcore_id)
lcore_id, RTE_MAX_LCORE-1);
return;
}
- if (global_fds[lcore_id] == 0)
+ if (global_fds[lcore_id] < 0)
return;
close(global_fds[lcore_id]);
- global_fds[lcore_id] = 0;
+ global_fds[lcore_id] = -1;
}