implement a new ubus object "network.device", add a method for dumping detailed devic...

[project/netifd.git] / system-linux.c

diff --git a/system-linux.c b/system-linux.c
index aba603f..e04fa23 100644 (file)
--- a/system-linux.c
+++ b/system-linux.c
@@ -1,3 +1,5 @@
+#define _GNU_SOURCE
+
 #include <sys/socket.h>
 #include <sys/ioctl.h>
 #include <sys/stat.h>
@@ -316,6 +318,49 @@ int system_if_check(struct device *dev)
        return 0;
 }
 
+int system_if_dump_stats(struct device *dev, struct blob_buf *b)
+{
+       const char *const counters[] = {
+               "collisions",     "rx_frame_errors",   "tx_compressed",
+               "multicast",      "rx_length_errors",  "tx_dropped",
+               "rx_bytes",       "rx_missed_errors",  "tx_errors",
+               "rx_compressed",  "rx_over_errors",    "tx_fifo_errors",
+               "rx_crc_errors",  "rx_packets",        "tx_heartbeat_errors",
+               "rx_dropped",     "tx_aborted_errors", "tx_packets",
+               "rx_errors",      "tx_bytes",          "tx_window_errors",
+               "rx_fifo_errors", "tx_carrier_errors",
+       };
+       char buf[64];
+       int stats_dir;
+       int i, fd, len;
+
+       snprintf(buf, sizeof(buf), "/sys/class/net/%s/statistics", dev->ifname);
+       stats_dir = open(buf, O_DIRECTORY);
+       if (stats_dir < 0)
+               return -1;
+
+       for (i = 0; i < ARRAY_SIZE(counters); i++) {
+               fd = openat(stats_dir, counters[i], O_RDONLY);
+               if (fd < 0)
+                       continue;
+
+retry:
+               len = read(fd, buf, sizeof(buf));
+               if (len < 0) {
+                       if (errno == EINTR)
+                               goto retry;
+                       continue;
+               }
+
+               buf[len] = 0;
+               blobmsg_add_u32(b, counters[i], strtoul(buf, NULL, 0));
+               close(fd);
+       }
+
+       close(stats_dir);
+       return 0;
+}
+
 static int system_addr(struct device *dev, struct device_addr *addr, int cmd)
 {
        int alen = ((addr->flags & DEVADDR_FAMILY) == DEVADDR_INET4) ? 4 : 16;