package/network/config/swconfig/src/uci.c

   1 /*
   2  * uci.c: UCI binding for the switch configuration utility
   3  *
   4  * Copyright (C) 2009 Felix Fietkau <nbd@nbd.name>
   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
  70         uci_foreach_element(&s->options, e) {
  71                 o = uci_to_option(e);
  72
  73                 if (o->type != UCI_TYPE_STRING)
  74                         continue;
  75
  76                 if (!strcmp(e->name, "device"))
  77                         continue;
  78
  79                 /* map early settings */
  80                 if (type == SWLIB_ATTR_GROUP_GLOBAL) {
  81                         int i;
  82
  83                         for (i = 0; i < ARRAY_SIZE(early_settings); i++) {
  84                                 if (strcmp(e->name, early_settings[i].name) != 0)
  85                                         continue;
  86
  87                                 early_settings[i].val = o->v.string;
  88                                 goto skip;
  89                         }
  90                 }
  91
  92                 attr = swlib_lookup_attr(dev, type, e->name);
  93                 if (!attr)
  94                         continue;
  95
  96                 setting = malloc(sizeof(struct swlib_setting));
  97                 memset(setting, 0, sizeof(struct swlib_setting));
  98                 setting->attr = attr;
  99                 setting->port_vlan = port_vlan;
 100                 setting->val = o->v.string;
 101                 *head = setting;
 102                 head = &setting->next;
 103 skip:
 104                 continue;
 105         }
 106 }
 107
 108 int swlib_apply_from_uci(struct switch_dev *dev, struct uci_package *p)
 109 {
 110         struct switch_attr *attr;
 111         struct uci_element *e;
 112         struct uci_section *s;
 113         struct uci_option *o;
 114         struct uci_ptr ptr;
 115         struct switch_val val;
 116         int i;
 117
 118         settings = NULL;
 119         head = &settings;
 120
 121         uci_foreach_element(&p->sections, e) {
 122                 struct uci_element *n;
 123
 124                 s = uci_to_section(e);
 125
 126                 if (strcmp(s->type, "switch") != 0)
 127                         continue;
 128
 129                 uci_foreach_element(&s->options, n) {
 130                         struct uci_option *o = uci_to_option(n);
 131
 132                         if (strcmp(n->name, "name") != 0)
 133                                 continue;
 134
 135                         if (o->type != UCI_TYPE_STRING)
 136                                 continue;
 137
 138                         if (swlib_match_name(dev, o->v.string))
 139                                 goto found;
 140
 141                         break;
 142                 }
 143
 144                 if (!swlib_match_name(dev, e->name))
 145                         continue;
 146
 147                 goto found;
 148         }
 149
 150         /* not found */
 151         return -1;
 152
 153 found:
 154         /* look up available early options, which need to be taken care
 155          * of in the correct order */
 156         for (i = 0; i < ARRAY_SIZE(early_settings); i++) {
 157                 early_settings[i].attr = swlib_lookup_attr(dev,
 158                         SWLIB_ATTR_GROUP_GLOBAL, early_settings[i].name);
 159         }
 160         swlib_map_settings(dev, SWLIB_ATTR_GROUP_GLOBAL, 0, s);
 161
 162         /* look for port or vlan sections */
 163         uci_foreach_element(&p->sections, e) {
 164                 struct uci_element *os;
 165                 s = uci_to_section(e);
 166
 167                 if (!strcmp(s->type, "switch_port")) {
 168                         char *devn = NULL, *port = NULL, *port_err = NULL;
 169                         int port_n;
 170
 171                         uci_foreach_element(&s->options, os) {
 172                                 o = uci_to_option(os);
 173                                 if (o->type != UCI_TYPE_STRING)
 174                                         continue;
 175
 176                                 if (!strcmp(os->name, "device")) {
 177                                         devn = o->v.string;
 178                                         if (!swlib_match_name(dev, devn))
 179                                                 devn = NULL;
 180                                 } else if (!strcmp(os->name, "port")) {
 181                                         port = o->v.string;
 182                                 }
 183                         }
 184                         if (!devn || !port || !port[0])
 185                                 continue;
 186
 187                         port_n = strtoul(port, &port_err, 0);
 188                         if (port_err && port_err[0])
 189                                 continue;
 190
 191                         swlib_map_settings(dev, SWLIB_ATTR_GROUP_PORT, port_n, s);
 192                 } else if (!strcmp(s->type, "switch_vlan")) {
 193                         char *devn = NULL, *vlan = NULL, *vlan_err = NULL;
 194                         int vlan_n;
 195
 196                         uci_foreach_element(&s->options, os) {
 197                                 o = uci_to_option(os);
 198                                 if (o->type != UCI_TYPE_STRING)
 199                                         continue;
 200
 201                                 if (!strcmp(os->name, "device")) {
 202                                         devn = o->v.string;
 203                                         if (!swlib_match_name(dev, devn))
 204                                                 devn = NULL;
 205                                 } else if (!strcmp(os->name, "vlan")) {
 206                                         vlan = o->v.string;
 207                                 }
 208                         }
 209                         if (!devn || !vlan || !vlan[0])
 210                                 continue;
 211
 212                         vlan_n = strtoul(vlan, &vlan_err, 0);
 213                         if (vlan_err && vlan_err[0])
 214                                 continue;
 215
 216                         swlib_map_settings(dev, SWLIB_ATTR_GROUP_VLAN, vlan_n, s);
 217                 }
 218         }
 219
 220         for (i = 0; i < ARRAY_SIZE(early_settings); i++) {
 221                 struct swlib_setting *st = &early_settings[i];
 222                 if (!st->attr || !st->val)
 223                         continue;
 224                 swlib_set_attr_string(dev, st->attr, st->port_vlan, st->val);
 225
 226         }
 227
 228         while (settings) {
 229                 struct swlib_setting *st = settings;
 230
 231                 swlib_set_attr_string(dev, st->attr, st->port_vlan, st->val);
 232                 st = st->next;
 233                 free(settings);
 234                 settings = st;
 235         }
 236
 237         /* Apply the config */
 238         attr = swlib_lookup_attr(dev, SWLIB_ATTR_GROUP_GLOBAL, "apply");
 239         if (!attr)
 240                 return 0;
 241
 242         memset(&val, 0, sizeof(val));
 243         swlib_set_attr(dev, attr, &val);
 244
 245         return 0;
 246 }