New upstream version 18.08upstream/18.08

Change-Id: I32fdf5e5016556d9c0a6d88ddaf1fc468961790a
Signed-off-by: Luca Boccassi <luca.boccassi@gmail.com>

1 files changed, 69 insertions, 7 deletions

diff --git a/drivers/net/virtio/virtio_user/vhost_user.c b/drivers/net/virtio/virtio_user/vhost_user.c
index 91c6449b..ef6e43df 100644
--- a/drivers/net/virtio/virtio_user/vhost_user.c
+++ b/drivers/net/virtio/virtio_user/vhost_user.c
@@ -138,12 +138,13 @@ struct hugepage_file_info {
 static int
 get_hugepage_file_info(struct hugepage_file_info huges[], int max)
 {
-	int idx;
+	int idx, k, exist;
 	FILE *f;
 	char buf[BUFSIZ], *tmp, *tail;
 	char *str_underline, *str_start;
 	int huge_index;
 	uint64_t v_start, v_end;
+	struct stat stats;
 
 	f = fopen("/proc/self/maps", "r");
 	if (!f) {
@@ -183,16 +184,39 @@ get_hugepage_file_info(struct hugepage_file_info huges[], int max)
 		if (sscanf(str_start, "map_%d", &huge_index) != 1)
 			continue;
 
+		/* skip duplicated file which is mapped to different regions */
+		for (k = 0, exist = -1; k < idx; ++k) {
+			if (!strcmp(huges[k].path, tmp)) {
+				exist = k;
+				break;
+			}
+		}
+		if (exist >= 0)
+			continue;
+
 		if (idx >= max) {
 			PMD_DRV_LOG(ERR, "Exceed maximum of %d", max);
 			goto error;
 		}
+
 		huges[idx].addr = v_start;
-		huges[idx].size = v_end - v_start;
+		huges[idx].size = v_end - v_start; /* To be corrected later */
 		snprintf(huges[idx].path, PATH_MAX, "%s", tmp);
 		idx++;
 	}
 
+	/* correct the size for files who have many regions */
+	for (k = 0; k < idx; ++k) {
+		if (stat(huges[k].path, &stats) < 0) {
+			PMD_DRV_LOG(ERR, "Failed to stat %s, %s\n",
+				    huges[k].path, strerror(errno));
+			continue;
+		}
+		huges[k].size = stats.st_size;
+		PMD_DRV_LOG(INFO, "file %s, size %zx\n",
+			    huges[k].path, huges[k].size);
+	}
+
 	fclose(f);
 	return idx;
 
@@ -263,6 +287,9 @@ vhost_user_sock(struct virtio_user_dev *dev,
 
 	PMD_DRV_LOG(INFO, "%s", vhost_msg_strings[req]);
 
+	if (dev->is_server && vhostfd < 0)
+		return -1;
+
 	msg.request = req;
 	msg.flags = VHOST_USER_VERSION;
 	msg.size = 0;
@@ -378,6 +405,30 @@ vhost_user_sock(struct virtio_user_dev *dev,
 	return 0;
 }
 
+#define MAX_VIRTIO_USER_BACKLOG 1
+static int
+virtio_user_start_server(struct virtio_user_dev *dev, struct sockaddr_un *un)
+{
+	int ret;
+	int flag;
+	int fd = dev->listenfd;
+
+	ret = bind(fd, (struct sockaddr *)un, sizeof(*un));
+	if (ret < 0) {
+		PMD_DRV_LOG(ERR, "failed to bind to %s: %s; remove it and try again\n",
+			    dev->path, strerror(errno));
+		return -1;
+	}
+	ret = listen(fd, MAX_VIRTIO_USER_BACKLOG);
+	if (ret < 0)
+		return -1;
+
+	flag = fcntl(fd, F_GETFL);
+	fcntl(fd, F_SETFL, flag | O_NONBLOCK);
+
+	return 0;
+}
+
 /**
  * Set up environment to talk with a vhost user backend.
  *
@@ -405,13 +456,24 @@ vhost_user_setup(struct virtio_user_dev *dev)
 	memset(&un, 0, sizeof(un));
 	un.sun_family = AF_UNIX;
 	snprintf(un.sun_path, sizeof(un.sun_path), "%s", dev->path);
-	if (connect(fd, (struct sockaddr *)&un, sizeof(un)) < 0) {
-		PMD_DRV_LOG(ERR, "connect error, %s", strerror(errno));
-		close(fd);
-		return -1;
+
+	if (dev->is_server) {
+		dev->listenfd = fd;
+		if (virtio_user_start_server(dev, &un) < 0) {
+			PMD_DRV_LOG(ERR, "virtio-user startup fails in server mode");
+			close(fd);
+			return -1;
+		}
+		dev->vhostfd = -1;
+	} else {
+		if (connect(fd, (struct sockaddr *)&un, sizeof(un)) < 0) {
+			PMD_DRV_LOG(ERR, "connect error, %s", strerror(errno));
+			close(fd);
+			return -1;
+		}
+		dev->vhostfd = fd;
 	}
 
-	dev->vhostfd = fd;
 	return 0;
 }