package/swconfig/src/uci.c

   1 /*
   2  * uci.c: UCI binding for the switch configuration utility
   3  *
   4  * Copyright (C) 2009 Felix Fietkau <nbd@openwrt.org>
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * version 2 as published by the Free Software Foundatio.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  */
  15
  16 #include <stdio.h>
  17 #include <string.h>
  18 #include <stdlib.h>
  19 #include <inttypes.h>
  20 #include <errno.h>
  21 #include <stdint.h>
  22 #include <getopt.h>
  23 #include <sys/types.h>
  24 #include <sys/socket.h>
  25 #include <uci.h>
  26
  27 #include <linux/types.h>
  28 #include <linux/netlink.h>
  29 #include <linux/genetlink.h>
  30 #include <netlink/netlink.h>
  31 #include <netlink/genl/genl.h>
  32 #include <netlink/genl/ctrl.h>
  33 #include <linux/switch.h>
  34 #include "swlib.h"
  35
  36 #ifndef ARRAY_SIZE
  37 #define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
  38 #endif
  39
  40 struct swlib_setting {
  41         struct switch_attr *attr;
  42         const char *name;
  43         int port_vlan;
  44         const char *val;
  45         struct swlib_setting *next;
  46 };
  47
  48 struct swlib_setting early_settings[] = {
  49         { .name = "reset", .val = "1" },
  50         { .name = "enable_vlan", .val = "1" },
  51 };
  52
  53 static struct swlib_setting *settings;
  54 static struct swlib_setting **head;
  55
  56 static bool swlib_match_name(struct switch_dev *dev, const char *name)
  57 {
  58         return (strcmp(name, dev->dev_name) == 0 ||
  59                 strcmp(name, dev->alias) == 0);
  60 }
  61
  62 static int
  63 swlib_map_settings(struct switch_dev *dev, int type, int port_vlan, struct uci_section *s)
  64 {
  65         struct swlib_setting *setting;
  66         struct switch_attr *attr;
  67         struct uci_element *e;
  68         struct uci_option *o;
  69         int i;
  70
  71         uci_foreach_element(&s->options, e) {
  72                 o = uci_to_option(e);
  73
  74                 if (o->type != UCI_TYPE_STRING)
  75                         continue;
  76
  77                 if (!strcmp(e->name, "device"))
  78                         continue;
  79
  80                 /* map early settings */
  81                 if (type == SWLIB_ATTR_GROUP_GLOBAL) {
  82                         int i;
  83
  84                         for (i = 0; i < ARRAY_SIZE(early_settings); i++) {
  85                                 if (strcmp(e->name, early_settings[i].name) != 0)
  86                                         continue;
  87
  88                                 early_settings[i].val = o->v.string;
  89                                 goto skip;
  90                         }
  91                 }
  92
  93                 attr = swlib_lookup_attr(dev, type, e->name);
  94                 if (!attr)
  95                         continue;
  96
  97                 setting = malloc(sizeof(struct swlib_setting));
  98                 memset(setting, 0, sizeof(struct swlib_setting));
  99                 setting->attr = attr;
 100                 setting->port_vlan = port_vlan;
 101                 setting->val = o->v.string;
 102                 *head = setting;
 103                 head = &setting->next;
 104 skip:
 105                 continue;
 106         }
 107 }
 108
 109 int swlib_apply_from_uci(struct switch_dev *dev, struct uci_package *p)
 110 {
 111         struct switch_attr *attr;
 112         struct uci_context *ctx = p->ctx;
 113         struct uci_element *e;
 114         struct uci_section *s;
 115         struct uci_option *o;
 116         struct uci_ptr ptr;
 117         struct switch_val val;
 118         int i;
 119
 120         settings = NULL;
 121         head = &settings;
 122
 123         uci_foreach_element(&p->sections, e) {
 124                 struct uci_element *n;
 125
 126                 s = uci_to_section(e);
 127
 128                 if (strcmp(s->type, "switch") != 0)
 129                         continue;
 130
 131                 uci_foreach_element(&s->options, n) {
 132                         struct uci_option *o = uci_to_option(n);
 133
 134                         if (strcmp(n->name, "name") != 0)
 135                                 continue;
 136
 137                         if (o->type != UCI_TYPE_STRING)
 138                                 continue;
 139
 140                         if (swlib_match_name(dev, o->v.string))
 141                                 goto found;
 142
 143                         break;
 144                 }
 145
 146                 if (!swlib_match_name(dev, e->name))
 147                         continue;
 148
 149                 goto found;
 150         }
 151
 152         /* not found */
 153         return -1;
 154
 155 found:
 156         /* look up available early options, which need to be taken care
 157          * of in the correct order */
 158         for (i = 0; i < ARRAY_SIZE(early_settings); i++) {
 159                 early_settings[i].attr = swlib_lookup_attr(dev,
 160                         SWLIB_ATTR_GROUP_GLOBAL, early_settings[i].name);
 161         }
 162         swlib_map_settings(dev, SWLIB_ATTR_GROUP_GLOBAL, 0, s);
 163
 164         /* look for port or vlan sections */
 165         uci_foreach_element(&p->sections, e) {
 166                 struct uci_element *os;
 167                 s = uci_to_section(e);
 168
 169                 if (!strcmp(s->type, "switch_port")) {
 170                         char *devn, *port, *port_err = NULL;
 171                         int port_n;
 172
 173                         uci_foreach_element(&s->options, os) {
 174                                 o = uci_to_option(os);
 175                                 if (o->type != UCI_TYPE_STRING)
 176                                         continue;
 177
 178                                 if (!strcmp(os->name, "device")) {
 179                                         devn = o->v.string;
 180                                         if (!swlib_match_name(dev, devn))
 181                                                 devn = NULL;
 182                                 } else if (!strcmp(os->name, "port")) {
 183                                         port = o->v.string;
 184                                 }
 185                         }
 186                         if (!devn || !port || !port[0])
 187                                 continue;
 188
 189                         port_n = strtoul(port, &port_err, 0);
 190                         if (port_err && port_err[0])
 191                                 continue;
 192
 193                         swlib_map_settings(dev, SWLIB_ATTR_GROUP_PORT, port_n, s);
 194                 } else if (!strcmp(s->type, "switch_vlan")) {
 195                         char *devn, *vlan, *vlan_err = NULL;
 196                         int vlan_n;
 197
 198                         uci_foreach_element(&s->options, os) {
 199                                 o = uci_to_option(os);
 200                                 if (o->type != UCI_TYPE_STRING)
 201                                         continue;
 202
 203                                 if (!strcmp(os->name, "device")) {
 204                                         devn = o->v.string;
 205                                         if (!swlib_match_name(dev, devn))
 206                                                 devn = NULL;
 207                                 } else if (!strcmp(os->name, "vlan")) {
 208                                         vlan = o->v.string;
 209                                 }
 210                         }
 211                         if (!devn || !vlan || !vlan[0])
 212                                 continue;
 213
 214                         vlan_n = strtoul(vlan, &vlan_err, 0);
 215                         if (vlan_err && vlan_err[0])
 216                                 continue;
 217
 218                         swlib_map_settings(dev, SWLIB_ATTR_GROUP_VLAN, vlan_n, s);
 219                 }
 220         }
 221
 222         for (i = 0; i < ARRAY_SIZE(early_settings); i++) {
 223                 struct swlib_setting *st = &early_settings[i];
 224                 if (!st->attr || !st->val)
 225                         continue;
 226                 swlib_set_attr_string(dev, st->attr, st->port_vlan, st->val);
 227
 228         }
 229
 230         while (settings) {
 231                 struct swlib_setting *st = settings;
 232
 233                 swlib_set_attr_string(dev, st->attr, st->port_vlan, st->val);
 234                 st = st->next;
 235                 free(settings);
 236                 settings = st;
 237         }
 238
 239         /* Apply the config */
 240         attr = swlib_lookup_attr(dev, SWLIB_ATTR_GROUP_GLOBAL, "apply");
 241         if (!attr)
 242                 return 0;
 243
 244         memset(&val, 0, sizeof(val));
 245         swlib_set_attr(dev, attr, &val);
 246
 247         return 0;
 248 }