[Xen-devel] [PATCH 1 of 6] xl: network-attach command

[Eric Chanudet <eric.chanudet@xxxxxxxxxx>]

This patch adds network-attach command to xl.

Usage: xl network-attach <Domain> [type=<type>] [mac=<mac>] [bridge=<bridge>]
[ip=<ip>] [script=<script>] [backend=<BackDomain>] [vifname=<name>]
[rate=<rate>] [model=<model>][accel=<accel>]

rate and accel parameters are not handled for now.

diff --git a/tools/libxl/libxl.c b/tools/libxl/libxl.c
--- a/tools/libxl/libxl.c
+++ b/tools/libxl/libxl.c
@@ -1420,6 +1420,8 @@ int libxl_device_nic_add(struct libxl_ct
     unsigned int boffset = 0;
     unsigned int foffset = 0;
     libxl_device device;
+    char *dompath, **l;
+    unsigned int nb;
 
     front = flexarray_make(16, 1);
     if (!front)
@@ -1428,6 +1430,19 @@ int libxl_device_nic_add(struct libxl_ct
     if (!back)
         return ERROR_NOMEM;
 
+    if (nic->devid == -1) {
+        if (!(dompath = libxl_xs_get_dompath(ctx, domid))) {
+            return ERROR_FAIL;
+        }
+        if (!(l = libxl_xs_directory(ctx, XBT_NULL,
+                                     libxl_sprintf(ctx, "%s/device/vif", 
dompath), &nb))) {
+            nic->devid = 0;
+        } else {
+            nic->devid = strtoul(l[nb - 1], NULL, 10) + 1;
+            libxl_free(ctx, l);
+        }
+    }
+
     device.backend_devid = nic->devid;
     device.backend_domid = nic->backend_domid;
     device.backend_kind = DEVICE_VIF;
diff --git a/tools/libxl/xl_cmdimpl.c b/tools/libxl/xl_cmdimpl.c
--- a/tools/libxl/xl_cmdimpl.c
+++ b/tools/libxl/xl_cmdimpl.c
@@ -573,7 +573,7 @@ static void parse_config_data(const char
             char *buf2 = strdup(buf);
             char *p, *p2;
             *vifs = (libxl_device_nic *) realloc(*vifs, sizeof 
(libxl_device_nic) * ((*num_vifs) + 1));
-            init_nic_info((*vifs) + (*num_vifs), (*num_vifs));
+            init_nic_info((*vifs) + (*num_vifs), (*num_vifs) + 1);
             p = strtok(buf2, ",");
             if (!p)
                 goto skip;
@@ -3058,3 +3058,86 @@ int main_trigger(int argc, char **argv)
 
     exit(0);
 }
+
+int main_networkattach(int argc, char **argv)
+{
+    int opt;
+    libxl_device_nic nic;
+    char *endptr, *tok;
+    int i;
+    unsigned int val;
+
+    if ((argc < 2) || (argc > 11)) {
+        help("network-attach");
+        exit(0);
+    }
+    while ((opt = getopt(argc, argv, "hl")) != -1) {
+        switch (opt) {
+        case 'h':
+            help("network-attach");
+            exit(0);
+        default:
+            fprintf(stderr, "option `%c' not supported.\n", opt);
+            break;
+        }
+    }
+
+    if (domain_qualifier_to_domid(argv[1], &domid, 0) < 0) {
+        fprintf(stderr, "%s is an invalid domain identifier\n", argv[1]);
+        exit(1);
+    }
+    init_nic_info(&nic, -1);
+    for (argv += 2, argc -= 2; argc > 0; ++argv, --argc) {
+        if (!strncmp("type=", *argv, 5)) {
+            if (!strncmp("vif", (*argv) + 5, 4)) {
+                nic.nictype = NICTYPE_VIF;
+            } else if (!strncmp("ioemu", (*argv) + 5, 5)) {
+                nic.nictype = NICTYPE_IOEMU;
+            } else {
+                fprintf(stderr, "Invalid parameter `type'.\n");
+                exit(1);
+            }
+        } else if (!strncmp("mac=", *argv, 4)) {
+            tok = strtok((*argv) + 4, ":");
+            for (i = 0; tok && i < 6; tok = strtok(NULL, ":"), ++i) {
+                val = strtoul(tok, &endptr, 16);
+                if ((tok == endptr) || (val > 255)) {
+                    fprintf(stderr, "Invalid parameter `mac'.\n");
+                    exit(1);
+                }
+                nic.mac[i] = val;
+            }
+        } else if (!strncmp("bridge=", *argv, 7)) {
+            nic.bridge = (*argv) + 7;
+        } else if (!strncmp("ip=", *argv, 3)) {
+            if (!inet_aton((*argv) + 3, &(nic.ip))) {
+                fprintf(stderr, "Invalid parameter `ip'.\n");
+                exit(1);
+            }
+        } else if (!strncmp("script=", *argv, 6)) {
+            nic.script = (*argv) + 6;
+        } else if (!strncmp("backend=", *argv, 8)) {
+            val = strtoul((*argv) + 8, &endptr, 10);
+            if (((*argv) + 8) == endptr) {
+                fprintf(stderr, "Invalid parameter `backend'.\n");
+                exit(1);
+            }
+            nic.backend_domid = val;
+        } else if (!strncmp("vifname=", *argv, 8)) {
+            nic.ifname = (*argv) + 8;
+        } else if (!strncmp("model=", *argv, 6)) {
+            nic.model = (*argv) + 6;
+        } else if (!strncmp("rate=", *argv, 5)) {
+        } else if (!strncmp("accel=", *argv, 6)) {
+        } else {
+            fprintf(stderr, "unrecognized argument `%s'\n", *argv);
+            exit(1);
+        }
+    }
+    nic.domid = domid;
+    if (libxl_device_nic_add(&ctx, domid, &nic)) {
+        fprintf(stderr, "libxl_device_nic_add failed.\n");
+        exit(1);
+    }
+    exit(0);
+}
diff --git a/tools/libxl/xl_cmdimpl.h b/tools/libxl/xl_cmdimpl.h
--- a/tools/libxl/xl_cmdimpl.h
+++ b/tools/libxl/xl_cmdimpl.h
@@ -39,5 +39,6 @@ int main_domid(int argc, char **argv);
 int main_domname(int argc, char **argv);
 int main_rename(int argc, char **argv);
 int main_trigger(int argc, char **argv);
+int main_networkattach(int argc, char **argv);
 
 void help(char *command);
diff --git a/tools/libxl/xl_cmdtable.c b/tools/libxl/xl_cmdtable.c
--- a/tools/libxl/xl_cmdtable.c
+++ b/tools/libxl/xl_cmdtable.c
@@ -172,6 +172,10 @@ struct cmd_spec cmd_table[] = {
       "Send a trigger to a domain",
       "<Domain> <nmi|reset|init|power|sleep> [<VCPU>]",
     },
+    { "network-attach",
+      &main_networkattach,
+      "Create a new virtual network device"
+    },
 };
 
 int cmdtable_len = sizeof(cmd_table)/sizeof(struct cmd_spec);

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