drivers/net/enic/enic_pp.c

   1 /*
   2  * Copyright 2011 Cisco Systems, Inc.  All rights reserved.
   3  *
   4  * This program is free software; you may redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; version 2 of the License.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
   9  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  10  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  11  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  12  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  13  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  14  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  15  * SOFTWARE.
  16  *
  17  */
  18
  19 #include <linux/kernel.h>
  20 #include <linux/string.h>
  21 #include <linux/errno.h>
  22 #include <linux/types.h>
  23 #include <linux/netdevice.h>
  24 #include <linux/etherdevice.h>
  25 #include <linux/rtnetlink.h>
  26 #include <net/ip.h>
  27
  28 #include "vnic_vic.h"
  29 #include "enic_res.h"
  30 #include "enic.h"
  31 #include "enic_dev.h"
  32
  33 static int enic_set_port_profile(struct enic *enic)
  34 {
  35         struct net_device *netdev = enic->netdev;
  36         struct vic_provinfo *vp;
  37         const u8 oui[3] = VIC_PROVINFO_CISCO_OUI;
  38         const u16 os_type = htons(VIC_GENERIC_PROV_OS_TYPE_LINUX);
  39         char uuid_str[38];
  40         char client_mac_str[18];
  41         u8 *client_mac;
  42         int err;
  43
  44         if (!(enic->pp.set & ENIC_SET_NAME) || !strlen(enic->pp.name))
  45                 return -EINVAL;
  46
  47         vp = vic_provinfo_alloc(GFP_KERNEL, oui,
  48                 VIC_PROVINFO_GENERIC_TYPE);
  49         if (!vp)
  50                 return -ENOMEM;
  51
  52         VIC_PROVINFO_ADD_TLV(vp,
  53                 VIC_GENERIC_PROV_TLV_PORT_PROFILE_NAME_STR,
  54                 strlen(enic->pp.name) + 1, enic->pp.name);
  55
  56         if (!is_zero_ether_addr(enic->pp.mac_addr))
  57                 client_mac = enic->pp.mac_addr;
  58         else
  59                 client_mac = netdev->dev_addr;
  60
  61         VIC_PROVINFO_ADD_TLV(vp,
  62                 VIC_GENERIC_PROV_TLV_CLIENT_MAC_ADDR,
  63                 ETH_ALEN, client_mac);
  64
  65         snprintf(client_mac_str, sizeof(client_mac_str), "%pM", client_mac);
  66         VIC_PROVINFO_ADD_TLV(vp,
  67                 VIC_GENERIC_PROV_TLV_CLUSTER_PORT_UUID_STR,
  68                 sizeof(client_mac_str), client_mac_str);
  69
  70         if (enic->pp.set & ENIC_SET_INSTANCE) {
  71                 sprintf(uuid_str, "%pUB", enic->pp.instance_uuid);
  72                 VIC_PROVINFO_ADD_TLV(vp,
  73                         VIC_GENERIC_PROV_TLV_CLIENT_UUID_STR,
  74                         sizeof(uuid_str), uuid_str);
  75         }
  76
  77         if (enic->pp.set & ENIC_SET_HOST) {
  78                 sprintf(uuid_str, "%pUB", enic->pp.host_uuid);
  79                 VIC_PROVINFO_ADD_TLV(vp,
  80                         VIC_GENERIC_PROV_TLV_HOST_UUID_STR,
  81                         sizeof(uuid_str), uuid_str);
  82         }
  83
  84         VIC_PROVINFO_ADD_TLV(vp,
  85                 VIC_GENERIC_PROV_TLV_OS_TYPE,
  86                 sizeof(os_type), &os_type);
  87
  88         err = enic_dev_status_to_errno(enic_dev_init_prov2(enic, vp));
  89
  90 add_tlv_failure:
  91         vic_provinfo_free(vp);
  92
  93         return err;
  94 }
  95
  96 static int enic_unset_port_profile(struct enic *enic)
  97 {
  98         int err;
  99
 100         err = enic_vnic_dev_deinit(enic);
 101         if (err)
 102                 return enic_dev_status_to_errno(err);
 103
 104         enic_reset_addr_lists(enic);
 105
 106         return 0;
 107 }
 108
 109 static int enic_are_pp_different(struct enic_port_profile *pp1,
 110                 struct enic_port_profile *pp2)
 111 {
 112         return strcmp(pp1->name, pp2->name) | !!memcmp(pp1->instance_uuid,
 113                 pp2->instance_uuid, PORT_UUID_MAX) |
 114                 !!memcmp(pp1->host_uuid, pp2->host_uuid, PORT_UUID_MAX) |
 115                 !!memcmp(pp1->mac_addr, pp2->mac_addr, ETH_ALEN);
 116 }
 117
 118 static int enic_pp_preassociate(struct enic *enic,
 119         struct enic_port_profile *prev_pp, int *restore_pp);
 120 static int enic_pp_disassociate(struct enic *enic,
 121         struct enic_port_profile *prev_pp, int *restore_pp);
 122 static int enic_pp_preassociate_rr(struct enic *enic,
 123         struct enic_port_profile *prev_pp, int *restore_pp);
 124 static int enic_pp_associate(struct enic *enic,
 125         struct enic_port_profile *prev_pp, int *restore_pp);
 126
 127 static int (*enic_pp_handlers[])(struct enic *enic,
 128                 struct enic_port_profile *prev_state, int *restore_pp) = {
 129         [PORT_REQUEST_PREASSOCIATE]     = enic_pp_preassociate,
 130         [PORT_REQUEST_PREASSOCIATE_RR]  = enic_pp_preassociate_rr,
 131         [PORT_REQUEST_ASSOCIATE]        = enic_pp_associate,
 132         [PORT_REQUEST_DISASSOCIATE]     = enic_pp_disassociate,
 133 };
 134
 135 static const int enic_pp_handlers_count =
 136                         sizeof(enic_pp_handlers)/sizeof(*enic_pp_handlers);
 137
 138 static int enic_pp_preassociate(struct enic *enic,
 139         struct enic_port_profile *prev_pp, int *restore_pp)
 140 {
 141         return -EOPNOTSUPP;
 142 }
 143
 144 static int enic_pp_disassociate(struct enic *enic,
 145         struct enic_port_profile *prev_pp, int *restore_pp)
 146 {
 147         return enic_unset_port_profile(enic);
 148 }
 149
 150 static int enic_pp_preassociate_rr(struct enic *enic,
 151         struct enic_port_profile *prev_pp, int *restore_pp)
 152 {
 153         int err;
 154         int active = 0;
 155
 156         if (enic->pp.request != PORT_REQUEST_ASSOCIATE) {
 157                 /* If pre-associate is not part of an associate.
 158                 We always disassociate first */
 159                 err = enic_pp_handlers[PORT_REQUEST_DISASSOCIATE](enic,
 160                         prev_pp, restore_pp);
 161                 if (err)
 162                         return err;
 163
 164                 *restore_pp = 0;
 165         }
 166
 167         *restore_pp = 0;
 168
 169         err = enic_set_port_profile(enic);
 170         if (err)
 171                 return err;
 172
 173         /* If pre-associate is not part of an associate. */
 174         if (enic->pp.request != PORT_REQUEST_ASSOCIATE)
 175                 err = enic_dev_status_to_errno(enic_dev_enable2(enic, active));
 176
 177         return err;
 178 }
 179
 180 static int enic_pp_associate(struct enic *enic,
 181         struct enic_port_profile *prev_pp, int *restore_pp)
 182 {
 183         int err;
 184         int active = 1;
 185
 186         /* Check if a pre-associate was called before */
 187         if (prev_pp->request != PORT_REQUEST_PREASSOCIATE_RR ||
 188                 (prev_pp->request == PORT_REQUEST_PREASSOCIATE_RR &&
 189                         enic_are_pp_different(prev_pp, &enic->pp))) {
 190                 err = enic_pp_handlers[PORT_REQUEST_DISASSOCIATE](
 191                         enic, prev_pp, restore_pp);
 192                 if (err)
 193                         return err;
 194
 195                 *restore_pp = 0;
 196         }
 197
 198         err = enic_pp_handlers[PORT_REQUEST_PREASSOCIATE_RR](
 199                         enic, prev_pp, restore_pp);
 200         if (err)
 201                 return err;
 202
 203         *restore_pp = 0;
 204
 205         return enic_dev_status_to_errno(enic_dev_enable2(enic, active));
 206 }
 207
 208 int enic_process_set_pp_request(struct enic *enic,
 209         struct enic_port_profile *prev_pp, int *restore_pp)
 210 {
 211         if (enic->pp.request < enic_pp_handlers_count
 212                 && enic_pp_handlers[enic->pp.request])
 213                 return enic_pp_handlers[enic->pp.request](enic,
 214                         prev_pp, restore_pp);
 215         else
 216                 return -EOPNOTSUPP;
 217 }
 218
 219 int enic_process_get_pp_request(struct enic *enic, int request,
 220         u16 *response)
 221 {
 222         int err, status = ERR_SUCCESS;
 223
 224         switch (request) {
 225
 226         case PORT_REQUEST_PREASSOCIATE_RR:
 227         case PORT_REQUEST_ASSOCIATE:
 228                 err = enic_dev_enable2_done(enic, &status);
 229                 break;
 230
 231         case PORT_REQUEST_DISASSOCIATE:
 232                 err = enic_dev_deinit_done(enic, &status);
 233                 break;
 234
 235         default:
 236                 return -EINVAL;
 237         }
 238
 239         if (err)
 240                 status = err;
 241
 242         switch (status) {
 243         case ERR_SUCCESS:
 244                 *response = PORT_PROFILE_RESPONSE_SUCCESS;
 245                 break;
 246         case ERR_EINVAL:
 247                 *response = PORT_PROFILE_RESPONSE_INVALID;
 248                 break;
 249         case ERR_EBADSTATE:
 250                 *response = PORT_PROFILE_RESPONSE_BADSTATE;
 251                 break;
 252         case ERR_ENOMEM:
 253                 *response = PORT_PROFILE_RESPONSE_INSUFFICIENT_RESOURCES;
 254                 break;
 255         case ERR_EINPROGRESS:
 256                 *response = PORT_PROFILE_RESPONSE_INPROGRESS;
 257                 break;
 258         default:
 259                 *response = PORT_PROFILE_RESPONSE_ERROR;
 260                 break;
 261         }
 262
 263         return 0;
 264 }