Vasu Dev | 9b34ecf | 2009-03-17 11:42:13 -0700 | [diff] [blame] | 1 | /* |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 2 | * Copyright (c) 2008-2009 Cisco Systems, Inc. All rights reserved. |
| 3 | * Copyright (c) 2009 Intel Corporation. All rights reserved. |
Vasu Dev | 9b34ecf | 2009-03-17 11:42:13 -0700 | [diff] [blame] | 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify it |
| 6 | * under the terms and conditions of the GNU General Public License, |
| 7 | * version 2, as published by the Free Software Foundation. |
| 8 | * |
| 9 | * This program is distributed in the hope it will be useful, but WITHOUT |
| 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 12 | * more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License along with |
| 15 | * this program; if not, write to the Free Software Foundation, Inc., |
| 16 | * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. |
| 17 | * |
| 18 | * Maintained at www.Open-FCoE.org |
| 19 | */ |
| 20 | |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 21 | #include <linux/types.h> |
Vasu Dev | 9b34ecf | 2009-03-17 11:42:13 -0700 | [diff] [blame] | 22 | #include <linux/module.h> |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 23 | #include <linux/kernel.h> |
| 24 | #include <linux/list.h> |
| 25 | #include <linux/spinlock.h> |
| 26 | #include <linux/timer.h> |
Vasu Dev | 5e80f7f | 2009-03-17 11:42:18 -0700 | [diff] [blame] | 27 | #include <linux/netdevice.h> |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 28 | #include <linux/etherdevice.h> |
| 29 | #include <linux/ethtool.h> |
| 30 | #include <linux/if_ether.h> |
| 31 | #include <linux/if_vlan.h> |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 32 | #include <linux/errno.h> |
| 33 | #include <linux/bitops.h> |
| 34 | #include <net/rtnetlink.h> |
| 35 | |
| 36 | #include <scsi/fc/fc_els.h> |
| 37 | #include <scsi/fc/fc_fs.h> |
| 38 | #include <scsi/fc/fc_fip.h> |
| 39 | #include <scsi/fc/fc_encaps.h> |
| 40 | #include <scsi/fc/fc_fcoe.h> |
Vasu Dev | 5e80f7f | 2009-03-17 11:42:18 -0700 | [diff] [blame] | 41 | |
| 42 | #include <scsi/libfc.h> |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 43 | #include <scsi/libfcoe.h> |
Vasu Dev | 9b34ecf | 2009-03-17 11:42:13 -0700 | [diff] [blame] | 44 | |
| 45 | MODULE_AUTHOR("Open-FCoE.org"); |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 46 | MODULE_DESCRIPTION("FIP discovery protocol support for FCoE HBAs"); |
Vasu Dev | 9b34ecf | 2009-03-17 11:42:13 -0700 | [diff] [blame] | 47 | MODULE_LICENSE("GPL v2"); |
Vasu Dev | 5e80f7f | 2009-03-17 11:42:18 -0700 | [diff] [blame] | 48 | |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 49 | #define FCOE_CTLR_MIN_FKA 500 /* min keep alive (mS) */ |
| 50 | #define FCOE_CTLR_DEF_FKA FIP_DEF_FKA /* default keep alive (mS) */ |
| 51 | |
| 52 | static void fcoe_ctlr_timeout(unsigned long); |
| 53 | static void fcoe_ctlr_link_work(struct work_struct *); |
| 54 | static void fcoe_ctlr_recv_work(struct work_struct *); |
| 55 | |
| 56 | static u8 fcoe_all_fcfs[ETH_ALEN] = FIP_ALL_FCF_MACS; |
| 57 | |
Robert Love | 650bd12 | 2009-06-10 15:31:05 -0700 | [diff] [blame] | 58 | unsigned int libfcoe_debug_logging; |
| 59 | module_param_named(debug_logging, libfcoe_debug_logging, int, S_IRUGO|S_IWUSR); |
| 60 | MODULE_PARM_DESC(debug_logging, "a bit mask of logging levels"); |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 61 | |
Robert Love | 650bd12 | 2009-06-10 15:31:05 -0700 | [diff] [blame] | 62 | #define LIBFCOE_LOGGING 0x01 /* General logging, not categorized */ |
| 63 | #define LIBFCOE_FIP_LOGGING 0x02 /* FIP logging */ |
| 64 | |
| 65 | #define LIBFCOE_CHECK_LOGGING(LEVEL, CMD) \ |
| 66 | do { \ |
| 67 | if (unlikely(libfcoe_debug_logging & LEVEL)) \ |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 68 | do { \ |
Robert Love | 650bd12 | 2009-06-10 15:31:05 -0700 | [diff] [blame] | 69 | CMD; \ |
| 70 | } while (0); \ |
Joe Eykholt | a69b06b | 2009-08-25 13:58:42 -0700 | [diff] [blame] | 71 | } while (0) |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 72 | |
Robert Love | 650bd12 | 2009-06-10 15:31:05 -0700 | [diff] [blame] | 73 | #define LIBFCOE_DBG(fmt, args...) \ |
| 74 | LIBFCOE_CHECK_LOGGING(LIBFCOE_LOGGING, \ |
| 75 | printk(KERN_INFO "libfcoe: " fmt, ##args);) |
| 76 | |
| 77 | #define LIBFCOE_FIP_DBG(fmt, args...) \ |
| 78 | LIBFCOE_CHECK_LOGGING(LIBFCOE_FIP_LOGGING, \ |
| 79 | printk(KERN_INFO "fip: " fmt, ##args);) |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 80 | |
| 81 | /* |
| 82 | * Return non-zero if FCF fcoe_size has been validated. |
| 83 | */ |
| 84 | static inline int fcoe_ctlr_mtu_valid(const struct fcoe_fcf *fcf) |
| 85 | { |
| 86 | return (fcf->flags & FIP_FL_SOL) != 0; |
| 87 | } |
| 88 | |
| 89 | /* |
| 90 | * Return non-zero if the FCF is usable. |
| 91 | */ |
| 92 | static inline int fcoe_ctlr_fcf_usable(struct fcoe_fcf *fcf) |
| 93 | { |
| 94 | u16 flags = FIP_FL_SOL | FIP_FL_AVAIL; |
| 95 | |
| 96 | return (fcf->flags & flags) == flags; |
| 97 | } |
| 98 | |
| 99 | /** |
| 100 | * fcoe_ctlr_init() - Initialize the FCoE Controller instance. |
| 101 | * @fip: FCoE controller. |
| 102 | */ |
| 103 | void fcoe_ctlr_init(struct fcoe_ctlr *fip) |
| 104 | { |
| 105 | fip->state = FIP_ST_LINK_WAIT; |
| 106 | INIT_LIST_HEAD(&fip->fcfs); |
| 107 | spin_lock_init(&fip->lock); |
| 108 | fip->flogi_oxid = FC_XID_UNKNOWN; |
| 109 | setup_timer(&fip->timer, fcoe_ctlr_timeout, (unsigned long)fip); |
| 110 | INIT_WORK(&fip->link_work, fcoe_ctlr_link_work); |
| 111 | INIT_WORK(&fip->recv_work, fcoe_ctlr_recv_work); |
| 112 | skb_queue_head_init(&fip->fip_recv_list); |
| 113 | } |
| 114 | EXPORT_SYMBOL(fcoe_ctlr_init); |
| 115 | |
| 116 | /** |
| 117 | * fcoe_ctlr_reset_fcfs() - Reset and free all FCFs for a controller. |
| 118 | * @fip: FCoE controller. |
| 119 | * |
| 120 | * Called with &fcoe_ctlr lock held. |
| 121 | */ |
| 122 | static void fcoe_ctlr_reset_fcfs(struct fcoe_ctlr *fip) |
| 123 | { |
| 124 | struct fcoe_fcf *fcf; |
| 125 | struct fcoe_fcf *next; |
| 126 | |
| 127 | fip->sel_fcf = NULL; |
| 128 | list_for_each_entry_safe(fcf, next, &fip->fcfs, list) { |
| 129 | list_del(&fcf->list); |
| 130 | kfree(fcf); |
| 131 | } |
| 132 | fip->fcf_count = 0; |
| 133 | fip->sel_time = 0; |
| 134 | } |
| 135 | |
| 136 | /** |
Chris Leech | dd3fd72 | 2009-04-21 16:27:36 -0700 | [diff] [blame] | 137 | * fcoe_ctlr_destroy() - Disable and tear-down the FCoE controller. |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 138 | * @fip: FCoE controller. |
| 139 | * |
| 140 | * This is called by FCoE drivers before freeing the &fcoe_ctlr. |
| 141 | * |
| 142 | * The receive handler will have been deleted before this to guarantee |
| 143 | * that no more recv_work will be scheduled. |
| 144 | * |
| 145 | * The timer routine will simply return once we set FIP_ST_DISABLED. |
| 146 | * This guarantees that no further timeouts or work will be scheduled. |
| 147 | */ |
| 148 | void fcoe_ctlr_destroy(struct fcoe_ctlr *fip) |
| 149 | { |
Chris Leech | a4b7cfa | 2009-08-25 13:59:08 -0700 | [diff] [blame] | 150 | cancel_work_sync(&fip->recv_work); |
| 151 | spin_lock_bh(&fip->fip_recv_list.lock); |
| 152 | __skb_queue_purge(&fip->fip_recv_list); |
| 153 | spin_unlock_bh(&fip->fip_recv_list.lock); |
| 154 | |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 155 | spin_lock_bh(&fip->lock); |
| 156 | fip->state = FIP_ST_DISABLED; |
| 157 | fcoe_ctlr_reset_fcfs(fip); |
| 158 | spin_unlock_bh(&fip->lock); |
| 159 | del_timer_sync(&fip->timer); |
Chris Leech | a4b7cfa | 2009-08-25 13:59:08 -0700 | [diff] [blame] | 160 | cancel_work_sync(&fip->link_work); |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 161 | } |
| 162 | EXPORT_SYMBOL(fcoe_ctlr_destroy); |
| 163 | |
| 164 | /** |
| 165 | * fcoe_ctlr_fcoe_size() - Return the maximum FCoE size required for VN_Port. |
| 166 | * @fip: FCoE controller. |
| 167 | * |
| 168 | * Returns the maximum packet size including the FCoE header and trailer, |
| 169 | * but not including any Ethernet or VLAN headers. |
| 170 | */ |
| 171 | static inline u32 fcoe_ctlr_fcoe_size(struct fcoe_ctlr *fip) |
| 172 | { |
| 173 | /* |
| 174 | * Determine the max FCoE frame size allowed, including |
| 175 | * FCoE header and trailer. |
| 176 | * Note: lp->mfs is currently the payload size, not the frame size. |
| 177 | */ |
| 178 | return fip->lp->mfs + sizeof(struct fc_frame_header) + |
| 179 | sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof); |
| 180 | } |
| 181 | |
| 182 | /** |
| 183 | * fcoe_ctlr_solicit() - Send a solicitation. |
| 184 | * @fip: FCoE controller. |
| 185 | * @fcf: Destination FCF. If NULL, a multicast solicitation is sent. |
| 186 | */ |
| 187 | static void fcoe_ctlr_solicit(struct fcoe_ctlr *fip, struct fcoe_fcf *fcf) |
| 188 | { |
| 189 | struct sk_buff *skb; |
| 190 | struct fip_sol { |
| 191 | struct ethhdr eth; |
| 192 | struct fip_header fip; |
| 193 | struct { |
| 194 | struct fip_mac_desc mac; |
| 195 | struct fip_wwn_desc wwnn; |
| 196 | struct fip_size_desc size; |
| 197 | } __attribute__((packed)) desc; |
| 198 | } __attribute__((packed)) *sol; |
| 199 | u32 fcoe_size; |
| 200 | |
| 201 | skb = dev_alloc_skb(sizeof(*sol)); |
| 202 | if (!skb) |
| 203 | return; |
| 204 | |
| 205 | sol = (struct fip_sol *)skb->data; |
| 206 | |
| 207 | memset(sol, 0, sizeof(*sol)); |
| 208 | memcpy(sol->eth.h_dest, fcf ? fcf->fcf_mac : fcoe_all_fcfs, ETH_ALEN); |
| 209 | memcpy(sol->eth.h_source, fip->ctl_src_addr, ETH_ALEN); |
| 210 | sol->eth.h_proto = htons(ETH_P_FIP); |
| 211 | |
| 212 | sol->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER); |
| 213 | sol->fip.fip_op = htons(FIP_OP_DISC); |
| 214 | sol->fip.fip_subcode = FIP_SC_SOL; |
| 215 | sol->fip.fip_dl_len = htons(sizeof(sol->desc) / FIP_BPW); |
| 216 | sol->fip.fip_flags = htons(FIP_FL_FPMA); |
Vasu Dev | 184dd34 | 2009-05-17 12:33:28 +0000 | [diff] [blame] | 217 | if (fip->spma) |
| 218 | sol->fip.fip_flags |= htons(FIP_FL_SPMA); |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 219 | |
| 220 | sol->desc.mac.fd_desc.fip_dtype = FIP_DT_MAC; |
| 221 | sol->desc.mac.fd_desc.fip_dlen = sizeof(sol->desc.mac) / FIP_BPW; |
| 222 | memcpy(sol->desc.mac.fd_mac, fip->ctl_src_addr, ETH_ALEN); |
| 223 | |
| 224 | sol->desc.wwnn.fd_desc.fip_dtype = FIP_DT_NAME; |
| 225 | sol->desc.wwnn.fd_desc.fip_dlen = sizeof(sol->desc.wwnn) / FIP_BPW; |
| 226 | put_unaligned_be64(fip->lp->wwnn, &sol->desc.wwnn.fd_wwn); |
| 227 | |
| 228 | fcoe_size = fcoe_ctlr_fcoe_size(fip); |
| 229 | sol->desc.size.fd_desc.fip_dtype = FIP_DT_FCOE_SIZE; |
| 230 | sol->desc.size.fd_desc.fip_dlen = sizeof(sol->desc.size) / FIP_BPW; |
| 231 | sol->desc.size.fd_size = htons(fcoe_size); |
| 232 | |
| 233 | skb_put(skb, sizeof(*sol)); |
Chris Leech | 0f49153 | 2009-05-06 10:52:18 -0700 | [diff] [blame] | 234 | skb->protocol = htons(ETH_P_FIP); |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 235 | skb_reset_mac_header(skb); |
| 236 | skb_reset_network_header(skb); |
| 237 | fip->send(fip, skb); |
| 238 | |
| 239 | if (!fcf) |
| 240 | fip->sol_time = jiffies; |
| 241 | } |
| 242 | |
| 243 | /** |
| 244 | * fcoe_ctlr_link_up() - Start FCoE controller. |
| 245 | * @fip: FCoE controller. |
| 246 | * |
| 247 | * Called from the LLD when the network link is ready. |
| 248 | */ |
| 249 | void fcoe_ctlr_link_up(struct fcoe_ctlr *fip) |
| 250 | { |
| 251 | spin_lock_bh(&fip->lock); |
| 252 | if (fip->state == FIP_ST_NON_FIP || fip->state == FIP_ST_AUTO) { |
| 253 | fip->last_link = 1; |
| 254 | fip->link = 1; |
| 255 | spin_unlock_bh(&fip->lock); |
| 256 | fc_linkup(fip->lp); |
| 257 | } else if (fip->state == FIP_ST_LINK_WAIT) { |
| 258 | fip->state = FIP_ST_AUTO; |
| 259 | fip->last_link = 1; |
| 260 | fip->link = 1; |
| 261 | spin_unlock_bh(&fip->lock); |
Robert Love | 650bd12 | 2009-06-10 15:31:05 -0700 | [diff] [blame] | 262 | LIBFCOE_FIP_DBG("%s", "setting AUTO mode.\n"); |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 263 | fc_linkup(fip->lp); |
| 264 | fcoe_ctlr_solicit(fip, NULL); |
| 265 | } else |
| 266 | spin_unlock_bh(&fip->lock); |
| 267 | } |
| 268 | EXPORT_SYMBOL(fcoe_ctlr_link_up); |
| 269 | |
| 270 | /** |
| 271 | * fcoe_ctlr_reset() - Reset FIP. |
| 272 | * @fip: FCoE controller. |
| 273 | * @new_state: FIP state to be entered. |
| 274 | * |
| 275 | * Returns non-zero if the link was up and now isn't. |
| 276 | */ |
| 277 | static int fcoe_ctlr_reset(struct fcoe_ctlr *fip, enum fip_state new_state) |
| 278 | { |
| 279 | struct fc_lport *lp = fip->lp; |
| 280 | int link_dropped; |
| 281 | |
| 282 | spin_lock_bh(&fip->lock); |
| 283 | fcoe_ctlr_reset_fcfs(fip); |
| 284 | del_timer(&fip->timer); |
| 285 | fip->state = new_state; |
| 286 | fip->ctlr_ka_time = 0; |
| 287 | fip->port_ka_time = 0; |
| 288 | fip->sol_time = 0; |
| 289 | fip->flogi_oxid = FC_XID_UNKNOWN; |
| 290 | fip->map_dest = 0; |
| 291 | fip->last_link = 0; |
| 292 | link_dropped = fip->link; |
| 293 | fip->link = 0; |
| 294 | spin_unlock_bh(&fip->lock); |
| 295 | |
| 296 | if (link_dropped) |
| 297 | fc_linkdown(lp); |
| 298 | |
| 299 | if (new_state == FIP_ST_ENABLED) { |
| 300 | fcoe_ctlr_solicit(fip, NULL); |
| 301 | fc_linkup(lp); |
| 302 | link_dropped = 0; |
| 303 | } |
| 304 | return link_dropped; |
| 305 | } |
| 306 | |
| 307 | /** |
| 308 | * fcoe_ctlr_link_down() - Stop FCoE controller. |
| 309 | * @fip: FCoE controller. |
| 310 | * |
| 311 | * Returns non-zero if the link was up and now isn't. |
| 312 | * |
| 313 | * Called from the LLD when the network link is not ready. |
| 314 | * There may be multiple calls while the link is down. |
| 315 | */ |
| 316 | int fcoe_ctlr_link_down(struct fcoe_ctlr *fip) |
| 317 | { |
| 318 | return fcoe_ctlr_reset(fip, FIP_ST_LINK_WAIT); |
| 319 | } |
| 320 | EXPORT_SYMBOL(fcoe_ctlr_link_down); |
| 321 | |
| 322 | /** |
| 323 | * fcoe_ctlr_send_keep_alive() - Send a keep-alive to the selected FCF. |
| 324 | * @fip: FCoE controller. |
Chris Leech | 11b5618 | 2009-11-03 11:46:29 -0800 | [diff] [blame^] | 325 | * @lport: libfc fc_lport to send from |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 326 | * @ports: 0 for controller keep-alive, 1 for port keep-alive. |
| 327 | * @sa: source MAC address. |
| 328 | * |
| 329 | * A controller keep-alive is sent every fka_period (typically 8 seconds). |
| 330 | * The source MAC is the native MAC address. |
| 331 | * |
| 332 | * A port keep-alive is sent every 90 seconds while logged in. |
| 333 | * The source MAC is the assigned mapped source address. |
| 334 | * The destination is the FCF's F-port. |
| 335 | */ |
Chris Leech | 11b5618 | 2009-11-03 11:46:29 -0800 | [diff] [blame^] | 336 | static void fcoe_ctlr_send_keep_alive(struct fcoe_ctlr *fip, |
| 337 | struct fc_lport *lport, |
| 338 | int ports, u8 *sa) |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 339 | { |
| 340 | struct sk_buff *skb; |
| 341 | struct fip_kal { |
| 342 | struct ethhdr eth; |
| 343 | struct fip_header fip; |
| 344 | struct fip_mac_desc mac; |
| 345 | } __attribute__((packed)) *kal; |
| 346 | struct fip_vn_desc *vn; |
| 347 | u32 len; |
| 348 | struct fc_lport *lp; |
| 349 | struct fcoe_fcf *fcf; |
| 350 | |
| 351 | fcf = fip->sel_fcf; |
| 352 | lp = fip->lp; |
| 353 | if (!fcf || !fc_host_port_id(lp->host)) |
| 354 | return; |
| 355 | |
| 356 | len = fcoe_ctlr_fcoe_size(fip) + sizeof(struct ethhdr); |
| 357 | BUG_ON(len < sizeof(*kal) + sizeof(*vn)); |
| 358 | skb = dev_alloc_skb(len); |
| 359 | if (!skb) |
| 360 | return; |
| 361 | |
| 362 | kal = (struct fip_kal *)skb->data; |
| 363 | memset(kal, 0, len); |
| 364 | memcpy(kal->eth.h_dest, fcf->fcf_mac, ETH_ALEN); |
| 365 | memcpy(kal->eth.h_source, sa, ETH_ALEN); |
| 366 | kal->eth.h_proto = htons(ETH_P_FIP); |
| 367 | |
| 368 | kal->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER); |
| 369 | kal->fip.fip_op = htons(FIP_OP_CTRL); |
| 370 | kal->fip.fip_subcode = FIP_SC_KEEP_ALIVE; |
| 371 | kal->fip.fip_dl_len = htons((sizeof(kal->mac) + |
| 372 | ports * sizeof(*vn)) / FIP_BPW); |
| 373 | kal->fip.fip_flags = htons(FIP_FL_FPMA); |
Vasu Dev | 184dd34 | 2009-05-17 12:33:28 +0000 | [diff] [blame] | 374 | if (fip->spma) |
| 375 | kal->fip.fip_flags |= htons(FIP_FL_SPMA); |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 376 | |
| 377 | kal->mac.fd_desc.fip_dtype = FIP_DT_MAC; |
| 378 | kal->mac.fd_desc.fip_dlen = sizeof(kal->mac) / FIP_BPW; |
| 379 | memcpy(kal->mac.fd_mac, fip->ctl_src_addr, ETH_ALEN); |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 380 | if (ports) { |
| 381 | vn = (struct fip_vn_desc *)(kal + 1); |
| 382 | vn->fd_desc.fip_dtype = FIP_DT_VN_ID; |
| 383 | vn->fd_desc.fip_dlen = sizeof(*vn) / FIP_BPW; |
Chris Leech | 11b5618 | 2009-11-03 11:46:29 -0800 | [diff] [blame^] | 384 | memcpy(vn->fd_mac, fip->get_src_addr(lport), ETH_ALEN); |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 385 | hton24(vn->fd_fc_id, fc_host_port_id(lp->host)); |
| 386 | put_unaligned_be64(lp->wwpn, &vn->fd_wwpn); |
| 387 | } |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 388 | skb_put(skb, len); |
Chris Leech | 0f49153 | 2009-05-06 10:52:18 -0700 | [diff] [blame] | 389 | skb->protocol = htons(ETH_P_FIP); |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 390 | skb_reset_mac_header(skb); |
| 391 | skb_reset_network_header(skb); |
| 392 | fip->send(fip, skb); |
| 393 | } |
| 394 | |
| 395 | /** |
| 396 | * fcoe_ctlr_encaps() - Encapsulate an ELS frame for FIP, without sending it. |
| 397 | * @fip: FCoE controller. |
Chris Leech | 11b5618 | 2009-11-03 11:46:29 -0800 | [diff] [blame^] | 398 | * @lport: libfc fc_lport to use for the source address |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 399 | * @dtype: FIP descriptor type for the frame. |
| 400 | * @skb: FCoE ELS frame including FC header but no FCoE headers. |
| 401 | * |
| 402 | * Returns non-zero error code on failure. |
| 403 | * |
| 404 | * The caller must check that the length is a multiple of 4. |
| 405 | * |
| 406 | * The @skb must have enough headroom (28 bytes) and tailroom (8 bytes). |
| 407 | * Headroom includes the FIP encapsulation description, FIP header, and |
| 408 | * Ethernet header. The tailroom is for the FIP MAC descriptor. |
| 409 | */ |
Chris Leech | 11b5618 | 2009-11-03 11:46:29 -0800 | [diff] [blame^] | 410 | static int fcoe_ctlr_encaps(struct fcoe_ctlr *fip, struct fc_lport *lport, |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 411 | u8 dtype, struct sk_buff *skb) |
| 412 | { |
| 413 | struct fip_encaps_head { |
| 414 | struct ethhdr eth; |
| 415 | struct fip_header fip; |
| 416 | struct fip_encaps encaps; |
| 417 | } __attribute__((packed)) *cap; |
| 418 | struct fip_mac_desc *mac; |
| 419 | struct fcoe_fcf *fcf; |
| 420 | size_t dlen; |
Yi Zou | 5a84bae | 2009-07-29 17:03:55 -0700 | [diff] [blame] | 421 | u16 fip_flags; |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 422 | |
| 423 | fcf = fip->sel_fcf; |
| 424 | if (!fcf) |
| 425 | return -ENODEV; |
Yi Zou | 5a84bae | 2009-07-29 17:03:55 -0700 | [diff] [blame] | 426 | |
| 427 | /* set flags according to both FCF and lport's capability on SPMA */ |
| 428 | fip_flags = fcf->flags; |
| 429 | fip_flags &= fip->spma ? FIP_FL_SPMA | FIP_FL_FPMA : FIP_FL_FPMA; |
| 430 | if (!fip_flags) |
| 431 | return -ENODEV; |
| 432 | |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 433 | dlen = sizeof(struct fip_encaps) + skb->len; /* len before push */ |
| 434 | cap = (struct fip_encaps_head *)skb_push(skb, sizeof(*cap)); |
| 435 | |
| 436 | memset(cap, 0, sizeof(*cap)); |
| 437 | memcpy(cap->eth.h_dest, fcf->fcf_mac, ETH_ALEN); |
| 438 | memcpy(cap->eth.h_source, fip->ctl_src_addr, ETH_ALEN); |
| 439 | cap->eth.h_proto = htons(ETH_P_FIP); |
| 440 | |
| 441 | cap->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER); |
| 442 | cap->fip.fip_op = htons(FIP_OP_LS); |
| 443 | cap->fip.fip_subcode = FIP_SC_REQ; |
| 444 | cap->fip.fip_dl_len = htons((dlen + sizeof(*mac)) / FIP_BPW); |
Yi Zou | 5a84bae | 2009-07-29 17:03:55 -0700 | [diff] [blame] | 445 | cap->fip.fip_flags = htons(fip_flags); |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 446 | |
| 447 | cap->encaps.fd_desc.fip_dtype = dtype; |
| 448 | cap->encaps.fd_desc.fip_dlen = dlen / FIP_BPW; |
| 449 | |
| 450 | mac = (struct fip_mac_desc *)skb_put(skb, sizeof(*mac)); |
| 451 | memset(mac, 0, sizeof(mac)); |
| 452 | mac->fd_desc.fip_dtype = FIP_DT_MAC; |
| 453 | mac->fd_desc.fip_dlen = sizeof(*mac) / FIP_BPW; |
Chris Leech | db36c06 | 2009-11-03 11:46:24 -0800 | [diff] [blame] | 454 | if (dtype != FIP_DT_FLOGI && dtype != FIP_DT_FDISC) |
Chris Leech | 11b5618 | 2009-11-03 11:46:29 -0800 | [diff] [blame^] | 455 | memcpy(mac->fd_mac, fip->get_src_addr(lport), ETH_ALEN); |
Vasu Dev | 184dd34 | 2009-05-17 12:33:28 +0000 | [diff] [blame] | 456 | else if (fip->spma) |
| 457 | memcpy(mac->fd_mac, fip->ctl_src_addr, ETH_ALEN); |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 458 | |
Chris Leech | 0f49153 | 2009-05-06 10:52:18 -0700 | [diff] [blame] | 459 | skb->protocol = htons(ETH_P_FIP); |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 460 | skb_reset_mac_header(skb); |
| 461 | skb_reset_network_header(skb); |
| 462 | return 0; |
| 463 | } |
| 464 | |
| 465 | /** |
| 466 | * fcoe_ctlr_els_send() - Send an ELS frame encapsulated by FIP if appropriate. |
| 467 | * @fip: FCoE controller. |
Chris Leech | 11b5618 | 2009-11-03 11:46:29 -0800 | [diff] [blame^] | 468 | * @lport: libfc fc_lport to send from |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 469 | * @skb: FCoE ELS frame including FC header but no FCoE headers. |
| 470 | * |
| 471 | * Returns a non-zero error code if the frame should not be sent. |
| 472 | * Returns zero if the caller should send the frame with FCoE encapsulation. |
| 473 | * |
| 474 | * The caller must check that the length is a multiple of 4. |
| 475 | * The SKB must have enough headroom (28 bytes) and tailroom (8 bytes). |
| 476 | */ |
Chris Leech | 11b5618 | 2009-11-03 11:46:29 -0800 | [diff] [blame^] | 477 | int fcoe_ctlr_els_send(struct fcoe_ctlr *fip, struct fc_lport *lport, |
| 478 | struct sk_buff *skb) |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 479 | { |
| 480 | struct fc_frame_header *fh; |
| 481 | u16 old_xid; |
| 482 | u8 op; |
Chris Leech | 11b5618 | 2009-11-03 11:46:29 -0800 | [diff] [blame^] | 483 | u8 mac[ETH_ALEN]; |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 484 | |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 485 | fh = (struct fc_frame_header *)skb->data; |
| 486 | op = *(u8 *)(fh + 1); |
| 487 | |
Joe Eykholt | 5f48f70 | 2009-05-06 10:52:12 -0700 | [diff] [blame] | 488 | if (op == ELS_FLOGI) { |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 489 | old_xid = fip->flogi_oxid; |
| 490 | fip->flogi_oxid = ntohs(fh->fh_ox_id); |
| 491 | if (fip->state == FIP_ST_AUTO) { |
| 492 | if (old_xid == FC_XID_UNKNOWN) |
| 493 | fip->flogi_count = 0; |
| 494 | fip->flogi_count++; |
| 495 | if (fip->flogi_count < 3) |
| 496 | goto drop; |
| 497 | fip->map_dest = 1; |
| 498 | return 0; |
| 499 | } |
Joe Eykholt | 5f48f70 | 2009-05-06 10:52:12 -0700 | [diff] [blame] | 500 | if (fip->state == FIP_ST_NON_FIP) |
| 501 | fip->map_dest = 1; |
| 502 | } |
| 503 | |
| 504 | if (fip->state == FIP_ST_NON_FIP) |
| 505 | return 0; |
| 506 | |
| 507 | switch (op) { |
| 508 | case ELS_FLOGI: |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 509 | op = FIP_DT_FLOGI; |
| 510 | break; |
| 511 | case ELS_FDISC: |
| 512 | if (ntoh24(fh->fh_s_id)) |
| 513 | return 0; |
| 514 | op = FIP_DT_FDISC; |
| 515 | break; |
| 516 | case ELS_LOGO: |
| 517 | if (fip->state != FIP_ST_ENABLED) |
| 518 | return 0; |
| 519 | if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI) |
| 520 | return 0; |
| 521 | op = FIP_DT_LOGO; |
| 522 | break; |
| 523 | case ELS_LS_ACC: |
| 524 | if (fip->flogi_oxid == FC_XID_UNKNOWN) |
| 525 | return 0; |
| 526 | if (!ntoh24(fh->fh_s_id)) |
| 527 | return 0; |
| 528 | if (fip->state == FIP_ST_AUTO) |
| 529 | return 0; |
| 530 | /* |
| 531 | * Here we must've gotten an SID by accepting an FLOGI |
| 532 | * from a point-to-point connection. Switch to using |
| 533 | * the source mac based on the SID. The destination |
| 534 | * MAC in this case would have been set by receving the |
| 535 | * FLOGI. |
| 536 | */ |
| 537 | fip->flogi_oxid = FC_XID_UNKNOWN; |
Chris Leech | 11b5618 | 2009-11-03 11:46:29 -0800 | [diff] [blame^] | 538 | fc_fcoe_set_mac(mac, fh->fh_d_id); |
| 539 | fip->update_mac(lport, mac); |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 540 | return 0; |
| 541 | default: |
| 542 | if (fip->state != FIP_ST_ENABLED) |
| 543 | goto drop; |
| 544 | return 0; |
| 545 | } |
Chris Leech | 11b5618 | 2009-11-03 11:46:29 -0800 | [diff] [blame^] | 546 | if (fcoe_ctlr_encaps(fip, lport, op, skb)) |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 547 | goto drop; |
| 548 | fip->send(fip, skb); |
| 549 | return -EINPROGRESS; |
| 550 | drop: |
| 551 | kfree_skb(skb); |
| 552 | return -EINVAL; |
| 553 | } |
| 554 | EXPORT_SYMBOL(fcoe_ctlr_els_send); |
| 555 | |
| 556 | /* |
| 557 | * fcoe_ctlr_age_fcfs() - Reset and free all old FCFs for a controller. |
| 558 | * @fip: FCoE controller. |
| 559 | * |
| 560 | * Called with lock held. |
| 561 | * |
| 562 | * An FCF is considered old if we have missed three advertisements. |
| 563 | * That is, there have been no valid advertisement from it for three |
| 564 | * times its keep-alive period including fuzz. |
| 565 | * |
| 566 | * In addition, determine the time when an FCF selection can occur. |
| 567 | */ |
| 568 | static void fcoe_ctlr_age_fcfs(struct fcoe_ctlr *fip) |
| 569 | { |
| 570 | struct fcoe_fcf *fcf; |
| 571 | struct fcoe_fcf *next; |
| 572 | unsigned long sel_time = 0; |
| 573 | |
| 574 | list_for_each_entry_safe(fcf, next, &fip->fcfs, list) { |
| 575 | if (time_after(jiffies, fcf->time + fcf->fka_period * 3 + |
| 576 | msecs_to_jiffies(FIP_FCF_FUZZ * 3))) { |
| 577 | if (fip->sel_fcf == fcf) |
| 578 | fip->sel_fcf = NULL; |
| 579 | list_del(&fcf->list); |
| 580 | WARN_ON(!fip->fcf_count); |
| 581 | fip->fcf_count--; |
| 582 | kfree(fcf); |
| 583 | } else if (fcoe_ctlr_mtu_valid(fcf) && |
| 584 | (!sel_time || time_before(sel_time, fcf->time))) { |
| 585 | sel_time = fcf->time; |
| 586 | } |
| 587 | } |
| 588 | if (sel_time) { |
| 589 | sel_time += msecs_to_jiffies(FCOE_CTLR_START_DELAY); |
| 590 | fip->sel_time = sel_time; |
| 591 | if (time_before(sel_time, fip->timer.expires)) |
| 592 | mod_timer(&fip->timer, sel_time); |
| 593 | } else { |
| 594 | fip->sel_time = 0; |
| 595 | } |
| 596 | } |
| 597 | |
| 598 | /** |
| 599 | * fcoe_ctlr_parse_adv() - Decode a FIP advertisement into a new FCF entry. |
| 600 | * @skb: received FIP advertisement frame |
| 601 | * @fcf: resulting FCF entry. |
| 602 | * |
| 603 | * Returns zero on a valid parsed advertisement, |
| 604 | * otherwise returns non zero value. |
| 605 | */ |
| 606 | static int fcoe_ctlr_parse_adv(struct sk_buff *skb, struct fcoe_fcf *fcf) |
| 607 | { |
| 608 | struct fip_header *fiph; |
| 609 | struct fip_desc *desc = NULL; |
| 610 | struct fip_wwn_desc *wwn; |
| 611 | struct fip_fab_desc *fab; |
| 612 | struct fip_fka_desc *fka; |
| 613 | unsigned long t; |
| 614 | size_t rlen; |
| 615 | size_t dlen; |
| 616 | |
| 617 | memset(fcf, 0, sizeof(*fcf)); |
| 618 | fcf->fka_period = msecs_to_jiffies(FCOE_CTLR_DEF_FKA); |
| 619 | |
| 620 | fiph = (struct fip_header *)skb->data; |
| 621 | fcf->flags = ntohs(fiph->fip_flags); |
| 622 | |
| 623 | rlen = ntohs(fiph->fip_dl_len) * 4; |
| 624 | if (rlen + sizeof(*fiph) > skb->len) |
| 625 | return -EINVAL; |
| 626 | |
| 627 | desc = (struct fip_desc *)(fiph + 1); |
| 628 | while (rlen > 0) { |
| 629 | dlen = desc->fip_dlen * FIP_BPW; |
| 630 | if (dlen < sizeof(*desc) || dlen > rlen) |
| 631 | return -EINVAL; |
| 632 | switch (desc->fip_dtype) { |
| 633 | case FIP_DT_PRI: |
| 634 | if (dlen != sizeof(struct fip_pri_desc)) |
| 635 | goto len_err; |
| 636 | fcf->pri = ((struct fip_pri_desc *)desc)->fd_pri; |
| 637 | break; |
| 638 | case FIP_DT_MAC: |
| 639 | if (dlen != sizeof(struct fip_mac_desc)) |
| 640 | goto len_err; |
| 641 | memcpy(fcf->fcf_mac, |
| 642 | ((struct fip_mac_desc *)desc)->fd_mac, |
| 643 | ETH_ALEN); |
| 644 | if (!is_valid_ether_addr(fcf->fcf_mac)) { |
Robert Love | 650bd12 | 2009-06-10 15:31:05 -0700 | [diff] [blame] | 645 | LIBFCOE_FIP_DBG("Invalid MAC address " |
| 646 | "in FIP adv\n"); |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 647 | return -EINVAL; |
| 648 | } |
| 649 | break; |
| 650 | case FIP_DT_NAME: |
| 651 | if (dlen != sizeof(struct fip_wwn_desc)) |
| 652 | goto len_err; |
| 653 | wwn = (struct fip_wwn_desc *)desc; |
| 654 | fcf->switch_name = get_unaligned_be64(&wwn->fd_wwn); |
| 655 | break; |
| 656 | case FIP_DT_FAB: |
| 657 | if (dlen != sizeof(struct fip_fab_desc)) |
| 658 | goto len_err; |
| 659 | fab = (struct fip_fab_desc *)desc; |
| 660 | fcf->fabric_name = get_unaligned_be64(&fab->fd_wwn); |
| 661 | fcf->vfid = ntohs(fab->fd_vfid); |
| 662 | fcf->fc_map = ntoh24(fab->fd_map); |
| 663 | break; |
| 664 | case FIP_DT_FKA: |
| 665 | if (dlen != sizeof(struct fip_fka_desc)) |
| 666 | goto len_err; |
| 667 | fka = (struct fip_fka_desc *)desc; |
| 668 | t = ntohl(fka->fd_fka_period); |
| 669 | if (t >= FCOE_CTLR_MIN_FKA) |
| 670 | fcf->fka_period = msecs_to_jiffies(t); |
| 671 | break; |
| 672 | case FIP_DT_MAP_OUI: |
| 673 | case FIP_DT_FCOE_SIZE: |
| 674 | case FIP_DT_FLOGI: |
| 675 | case FIP_DT_FDISC: |
| 676 | case FIP_DT_LOGO: |
| 677 | case FIP_DT_ELP: |
| 678 | default: |
Robert Love | 650bd12 | 2009-06-10 15:31:05 -0700 | [diff] [blame] | 679 | LIBFCOE_FIP_DBG("unexpected descriptor type %x " |
| 680 | "in FIP adv\n", desc->fip_dtype); |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 681 | /* standard says ignore unknown descriptors >= 128 */ |
| 682 | if (desc->fip_dtype < FIP_DT_VENDOR_BASE) |
| 683 | return -EINVAL; |
| 684 | continue; |
| 685 | } |
| 686 | desc = (struct fip_desc *)((char *)desc + dlen); |
| 687 | rlen -= dlen; |
| 688 | } |
| 689 | if (!fcf->fc_map || (fcf->fc_map & 0x10000)) |
| 690 | return -EINVAL; |
| 691 | if (!fcf->switch_name || !fcf->fabric_name) |
| 692 | return -EINVAL; |
| 693 | return 0; |
| 694 | |
| 695 | len_err: |
Robert Love | 650bd12 | 2009-06-10 15:31:05 -0700 | [diff] [blame] | 696 | LIBFCOE_FIP_DBG("FIP length error in descriptor type %x len %zu\n", |
| 697 | desc->fip_dtype, dlen); |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 698 | return -EINVAL; |
| 699 | } |
| 700 | |
| 701 | /** |
| 702 | * fcoe_ctlr_recv_adv() - Handle an incoming advertisement. |
| 703 | * @fip: FCoE controller. |
| 704 | * @skb: Received FIP packet. |
| 705 | */ |
| 706 | static void fcoe_ctlr_recv_adv(struct fcoe_ctlr *fip, struct sk_buff *skb) |
| 707 | { |
| 708 | struct fcoe_fcf *fcf; |
| 709 | struct fcoe_fcf new; |
| 710 | struct fcoe_fcf *found; |
| 711 | unsigned long sol_tov = msecs_to_jiffies(FCOE_CTRL_SOL_TOV); |
| 712 | int first = 0; |
| 713 | int mtu_valid; |
| 714 | |
| 715 | if (fcoe_ctlr_parse_adv(skb, &new)) |
| 716 | return; |
| 717 | |
| 718 | spin_lock_bh(&fip->lock); |
| 719 | first = list_empty(&fip->fcfs); |
| 720 | found = NULL; |
| 721 | list_for_each_entry(fcf, &fip->fcfs, list) { |
| 722 | if (fcf->switch_name == new.switch_name && |
| 723 | fcf->fabric_name == new.fabric_name && |
| 724 | fcf->fc_map == new.fc_map && |
| 725 | compare_ether_addr(fcf->fcf_mac, new.fcf_mac) == 0) { |
| 726 | found = fcf; |
| 727 | break; |
| 728 | } |
| 729 | } |
| 730 | if (!found) { |
| 731 | if (fip->fcf_count >= FCOE_CTLR_FCF_LIMIT) |
| 732 | goto out; |
| 733 | |
| 734 | fcf = kmalloc(sizeof(*fcf), GFP_ATOMIC); |
| 735 | if (!fcf) |
| 736 | goto out; |
| 737 | |
| 738 | fip->fcf_count++; |
| 739 | memcpy(fcf, &new, sizeof(new)); |
| 740 | list_add(&fcf->list, &fip->fcfs); |
| 741 | } else { |
| 742 | /* |
| 743 | * Flags in advertisements are ignored once the FCF is |
| 744 | * selected. Flags in unsolicited advertisements are |
| 745 | * ignored after a usable solicited advertisement |
| 746 | * has been received. |
| 747 | */ |
| 748 | if (fcf == fip->sel_fcf) { |
| 749 | fip->ctlr_ka_time -= fcf->fka_period; |
| 750 | fip->ctlr_ka_time += new.fka_period; |
| 751 | if (time_before(fip->ctlr_ka_time, fip->timer.expires)) |
| 752 | mod_timer(&fip->timer, fip->ctlr_ka_time); |
| 753 | } else if (!fcoe_ctlr_fcf_usable(fcf)) |
| 754 | fcf->flags = new.flags; |
| 755 | fcf->fka_period = new.fka_period; |
| 756 | memcpy(fcf->fcf_mac, new.fcf_mac, ETH_ALEN); |
| 757 | } |
| 758 | mtu_valid = fcoe_ctlr_mtu_valid(fcf); |
| 759 | fcf->time = jiffies; |
Robert Love | 650bd12 | 2009-06-10 15:31:05 -0700 | [diff] [blame] | 760 | if (!found) { |
| 761 | LIBFCOE_FIP_DBG("New FCF for fab %llx map %x val %d\n", |
| 762 | fcf->fabric_name, fcf->fc_map, mtu_valid); |
| 763 | } |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 764 | |
| 765 | /* |
| 766 | * If this advertisement is not solicited and our max receive size |
| 767 | * hasn't been verified, send a solicited advertisement. |
| 768 | */ |
| 769 | if (!mtu_valid) |
| 770 | fcoe_ctlr_solicit(fip, fcf); |
| 771 | |
| 772 | /* |
| 773 | * If its been a while since we did a solicit, and this is |
| 774 | * the first advertisement we've received, do a multicast |
| 775 | * solicitation to gather as many advertisements as we can |
| 776 | * before selection occurs. |
| 777 | */ |
| 778 | if (first && time_after(jiffies, fip->sol_time + sol_tov)) |
| 779 | fcoe_ctlr_solicit(fip, NULL); |
| 780 | |
| 781 | /* |
| 782 | * If this is the first validated FCF, note the time and |
| 783 | * set a timer to trigger selection. |
| 784 | */ |
| 785 | if (mtu_valid && !fip->sel_time && fcoe_ctlr_fcf_usable(fcf)) { |
| 786 | fip->sel_time = jiffies + |
| 787 | msecs_to_jiffies(FCOE_CTLR_START_DELAY); |
| 788 | if (!timer_pending(&fip->timer) || |
| 789 | time_before(fip->sel_time, fip->timer.expires)) |
| 790 | mod_timer(&fip->timer, fip->sel_time); |
| 791 | } |
| 792 | out: |
| 793 | spin_unlock_bh(&fip->lock); |
| 794 | } |
| 795 | |
| 796 | /** |
| 797 | * fcoe_ctlr_recv_els() - Handle an incoming FIP-encapsulated ELS frame. |
| 798 | * @fip: FCoE controller. |
| 799 | * @skb: Received FIP packet. |
| 800 | */ |
| 801 | static void fcoe_ctlr_recv_els(struct fcoe_ctlr *fip, struct sk_buff *skb) |
| 802 | { |
| 803 | struct fc_lport *lp = fip->lp; |
| 804 | struct fip_header *fiph; |
Chris Leech | 11b5618 | 2009-11-03 11:46:29 -0800 | [diff] [blame^] | 805 | struct fc_frame *fp = (struct fc_frame *)skb; |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 806 | struct fc_frame_header *fh = NULL; |
| 807 | struct fip_desc *desc; |
| 808 | struct fip_encaps *els; |
| 809 | struct fcoe_dev_stats *stats; |
| 810 | enum fip_desc_type els_dtype = 0; |
| 811 | u8 els_op; |
| 812 | u8 sub; |
| 813 | u8 granted_mac[ETH_ALEN] = { 0 }; |
| 814 | size_t els_len = 0; |
| 815 | size_t rlen; |
| 816 | size_t dlen; |
| 817 | |
| 818 | fiph = (struct fip_header *)skb->data; |
| 819 | sub = fiph->fip_subcode; |
| 820 | if (sub != FIP_SC_REQ && sub != FIP_SC_REP) |
| 821 | goto drop; |
| 822 | |
| 823 | rlen = ntohs(fiph->fip_dl_len) * 4; |
| 824 | if (rlen + sizeof(*fiph) > skb->len) |
| 825 | goto drop; |
| 826 | |
| 827 | desc = (struct fip_desc *)(fiph + 1); |
| 828 | while (rlen > 0) { |
| 829 | dlen = desc->fip_dlen * FIP_BPW; |
| 830 | if (dlen < sizeof(*desc) || dlen > rlen) |
| 831 | goto drop; |
| 832 | switch (desc->fip_dtype) { |
| 833 | case FIP_DT_MAC: |
| 834 | if (dlen != sizeof(struct fip_mac_desc)) |
| 835 | goto len_err; |
| 836 | memcpy(granted_mac, |
| 837 | ((struct fip_mac_desc *)desc)->fd_mac, |
| 838 | ETH_ALEN); |
| 839 | if (!is_valid_ether_addr(granted_mac)) { |
Robert Love | 650bd12 | 2009-06-10 15:31:05 -0700 | [diff] [blame] | 840 | LIBFCOE_FIP_DBG("Invalid MAC address " |
| 841 | "in FIP ELS\n"); |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 842 | goto drop; |
| 843 | } |
Chris Leech | 11b5618 | 2009-11-03 11:46:29 -0800 | [diff] [blame^] | 844 | memcpy(fr_cb(fp)->granted_mac, granted_mac, ETH_ALEN); |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 845 | break; |
| 846 | case FIP_DT_FLOGI: |
| 847 | case FIP_DT_FDISC: |
| 848 | case FIP_DT_LOGO: |
| 849 | case FIP_DT_ELP: |
| 850 | if (fh) |
| 851 | goto drop; |
| 852 | if (dlen < sizeof(*els) + sizeof(*fh) + 1) |
| 853 | goto len_err; |
| 854 | els_len = dlen - sizeof(*els); |
| 855 | els = (struct fip_encaps *)desc; |
| 856 | fh = (struct fc_frame_header *)(els + 1); |
| 857 | els_dtype = desc->fip_dtype; |
| 858 | break; |
| 859 | default: |
Robert Love | 650bd12 | 2009-06-10 15:31:05 -0700 | [diff] [blame] | 860 | LIBFCOE_FIP_DBG("unexpected descriptor type %x " |
| 861 | "in FIP adv\n", desc->fip_dtype); |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 862 | /* standard says ignore unknown descriptors >= 128 */ |
| 863 | if (desc->fip_dtype < FIP_DT_VENDOR_BASE) |
| 864 | goto drop; |
| 865 | continue; |
| 866 | } |
| 867 | desc = (struct fip_desc *)((char *)desc + dlen); |
| 868 | rlen -= dlen; |
| 869 | } |
| 870 | |
| 871 | if (!fh) |
| 872 | goto drop; |
| 873 | els_op = *(u8 *)(fh + 1); |
| 874 | |
Chris Leech | 11b5618 | 2009-11-03 11:46:29 -0800 | [diff] [blame^] | 875 | if (els_dtype == FIP_DT_FLOGI && sub == FIP_SC_REP && |
| 876 | fip->flogi_oxid == ntohs(fh->fh_ox_id) && |
| 877 | els_op == ELS_LS_ACC && is_valid_ether_addr(granted_mac)) |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 878 | fip->flogi_oxid = FC_XID_UNKNOWN; |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 879 | |
| 880 | /* |
| 881 | * Convert skb into an fc_frame containing only the ELS. |
| 882 | */ |
| 883 | skb_pull(skb, (u8 *)fh - skb->data); |
| 884 | skb_trim(skb, els_len); |
| 885 | fp = (struct fc_frame *)skb; |
| 886 | fc_frame_init(fp); |
| 887 | fr_sof(fp) = FC_SOF_I3; |
| 888 | fr_eof(fp) = FC_EOF_T; |
| 889 | fr_dev(fp) = lp; |
| 890 | |
| 891 | stats = fc_lport_get_stats(lp); |
| 892 | stats->RxFrames++; |
| 893 | stats->RxWords += skb->len / FIP_BPW; |
| 894 | |
Vasu Dev | 52ff878 | 2009-07-29 17:05:10 -0700 | [diff] [blame] | 895 | fc_exch_recv(lp, fp); |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 896 | return; |
| 897 | |
| 898 | len_err: |
Robert Love | 650bd12 | 2009-06-10 15:31:05 -0700 | [diff] [blame] | 899 | LIBFCOE_FIP_DBG("FIP length error in descriptor type %x len %zu\n", |
| 900 | desc->fip_dtype, dlen); |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 901 | drop: |
| 902 | kfree_skb(skb); |
| 903 | } |
| 904 | |
| 905 | /** |
| 906 | * fcoe_ctlr_recv_els() - Handle an incoming link reset frame. |
| 907 | * @fip: FCoE controller. |
| 908 | * @fh: Received FIP header. |
| 909 | * |
| 910 | * There may be multiple VN_Port descriptors. |
| 911 | * The overall length has already been checked. |
| 912 | */ |
| 913 | static void fcoe_ctlr_recv_clr_vlink(struct fcoe_ctlr *fip, |
| 914 | struct fip_header *fh) |
| 915 | { |
| 916 | struct fip_desc *desc; |
| 917 | struct fip_mac_desc *mp; |
| 918 | struct fip_wwn_desc *wp; |
| 919 | struct fip_vn_desc *vp; |
| 920 | size_t rlen; |
| 921 | size_t dlen; |
| 922 | struct fcoe_fcf *fcf = fip->sel_fcf; |
| 923 | struct fc_lport *lp = fip->lp; |
| 924 | u32 desc_mask; |
| 925 | |
Robert Love | 650bd12 | 2009-06-10 15:31:05 -0700 | [diff] [blame] | 926 | LIBFCOE_FIP_DBG("Clear Virtual Link received\n"); |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 927 | if (!fcf) |
| 928 | return; |
| 929 | if (!fcf || !fc_host_port_id(lp->host)) |
| 930 | return; |
| 931 | |
| 932 | /* |
| 933 | * mask of required descriptors. Validating each one clears its bit. |
| 934 | */ |
| 935 | desc_mask = BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME) | BIT(FIP_DT_VN_ID); |
| 936 | |
| 937 | rlen = ntohs(fh->fip_dl_len) * FIP_BPW; |
| 938 | desc = (struct fip_desc *)(fh + 1); |
| 939 | while (rlen >= sizeof(*desc)) { |
| 940 | dlen = desc->fip_dlen * FIP_BPW; |
| 941 | if (dlen > rlen) |
| 942 | return; |
| 943 | switch (desc->fip_dtype) { |
| 944 | case FIP_DT_MAC: |
| 945 | mp = (struct fip_mac_desc *)desc; |
| 946 | if (dlen < sizeof(*mp)) |
| 947 | return; |
| 948 | if (compare_ether_addr(mp->fd_mac, fcf->fcf_mac)) |
| 949 | return; |
| 950 | desc_mask &= ~BIT(FIP_DT_MAC); |
| 951 | break; |
| 952 | case FIP_DT_NAME: |
| 953 | wp = (struct fip_wwn_desc *)desc; |
| 954 | if (dlen < sizeof(*wp)) |
| 955 | return; |
| 956 | if (get_unaligned_be64(&wp->fd_wwn) != fcf->switch_name) |
| 957 | return; |
| 958 | desc_mask &= ~BIT(FIP_DT_NAME); |
| 959 | break; |
| 960 | case FIP_DT_VN_ID: |
| 961 | vp = (struct fip_vn_desc *)desc; |
| 962 | if (dlen < sizeof(*vp)) |
| 963 | return; |
| 964 | if (compare_ether_addr(vp->fd_mac, |
Chris Leech | 11b5618 | 2009-11-03 11:46:29 -0800 | [diff] [blame^] | 965 | fip->get_src_addr(lp)) == 0 && |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 966 | get_unaligned_be64(&vp->fd_wwpn) == lp->wwpn && |
| 967 | ntoh24(vp->fd_fc_id) == fc_host_port_id(lp->host)) |
| 968 | desc_mask &= ~BIT(FIP_DT_VN_ID); |
| 969 | break; |
| 970 | default: |
| 971 | /* standard says ignore unknown descriptors >= 128 */ |
| 972 | if (desc->fip_dtype < FIP_DT_VENDOR_BASE) |
| 973 | return; |
| 974 | break; |
| 975 | } |
| 976 | desc = (struct fip_desc *)((char *)desc + dlen); |
| 977 | rlen -= dlen; |
| 978 | } |
| 979 | |
| 980 | /* |
| 981 | * reset only if all required descriptors were present and valid. |
| 982 | */ |
| 983 | if (desc_mask) { |
Robert Love | 650bd12 | 2009-06-10 15:31:05 -0700 | [diff] [blame] | 984 | LIBFCOE_FIP_DBG("missing descriptors mask %x\n", desc_mask); |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 985 | } else { |
Robert Love | 650bd12 | 2009-06-10 15:31:05 -0700 | [diff] [blame] | 986 | LIBFCOE_FIP_DBG("performing Clear Virtual Link\n"); |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 987 | fcoe_ctlr_reset(fip, FIP_ST_ENABLED); |
| 988 | } |
| 989 | } |
| 990 | |
| 991 | /** |
| 992 | * fcoe_ctlr_recv() - Receive a FIP frame. |
| 993 | * @fip: FCoE controller. |
| 994 | * @skb: Received FIP packet. |
| 995 | * |
| 996 | * This is called from NET_RX_SOFTIRQ. |
| 997 | */ |
| 998 | void fcoe_ctlr_recv(struct fcoe_ctlr *fip, struct sk_buff *skb) |
| 999 | { |
| 1000 | spin_lock_bh(&fip->fip_recv_list.lock); |
| 1001 | __skb_queue_tail(&fip->fip_recv_list, skb); |
| 1002 | spin_unlock_bh(&fip->fip_recv_list.lock); |
| 1003 | schedule_work(&fip->recv_work); |
| 1004 | } |
| 1005 | EXPORT_SYMBOL(fcoe_ctlr_recv); |
| 1006 | |
| 1007 | /** |
| 1008 | * fcoe_ctlr_recv_handler() - Receive a FIP frame. |
| 1009 | * @fip: FCoE controller. |
| 1010 | * @skb: Received FIP packet. |
| 1011 | * |
| 1012 | * Returns non-zero if the frame is dropped. |
| 1013 | */ |
| 1014 | static int fcoe_ctlr_recv_handler(struct fcoe_ctlr *fip, struct sk_buff *skb) |
| 1015 | { |
| 1016 | struct fip_header *fiph; |
| 1017 | struct ethhdr *eh; |
| 1018 | enum fip_state state; |
| 1019 | u16 op; |
| 1020 | u8 sub; |
| 1021 | |
| 1022 | if (skb_linearize(skb)) |
| 1023 | goto drop; |
| 1024 | if (skb->len < sizeof(*fiph)) |
| 1025 | goto drop; |
| 1026 | eh = eth_hdr(skb); |
| 1027 | if (compare_ether_addr(eh->h_dest, fip->ctl_src_addr) && |
| 1028 | compare_ether_addr(eh->h_dest, FIP_ALL_ENODE_MACS)) |
| 1029 | goto drop; |
| 1030 | fiph = (struct fip_header *)skb->data; |
| 1031 | op = ntohs(fiph->fip_op); |
| 1032 | sub = fiph->fip_subcode; |
| 1033 | |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 1034 | if (FIP_VER_DECAPS(fiph->fip_ver) != FIP_VER) |
| 1035 | goto drop; |
| 1036 | if (ntohs(fiph->fip_dl_len) * FIP_BPW + sizeof(*fiph) > skb->len) |
| 1037 | goto drop; |
| 1038 | |
| 1039 | spin_lock_bh(&fip->lock); |
| 1040 | state = fip->state; |
| 1041 | if (state == FIP_ST_AUTO) { |
| 1042 | fip->map_dest = 0; |
| 1043 | fip->state = FIP_ST_ENABLED; |
| 1044 | state = FIP_ST_ENABLED; |
Robert Love | 650bd12 | 2009-06-10 15:31:05 -0700 | [diff] [blame] | 1045 | LIBFCOE_FIP_DBG("Using FIP mode\n"); |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 1046 | } |
| 1047 | spin_unlock_bh(&fip->lock); |
| 1048 | if (state != FIP_ST_ENABLED) |
| 1049 | goto drop; |
| 1050 | |
| 1051 | if (op == FIP_OP_LS) { |
| 1052 | fcoe_ctlr_recv_els(fip, skb); /* consumes skb */ |
| 1053 | return 0; |
| 1054 | } |
| 1055 | if (op == FIP_OP_DISC && sub == FIP_SC_ADV) |
| 1056 | fcoe_ctlr_recv_adv(fip, skb); |
| 1057 | else if (op == FIP_OP_CTRL && sub == FIP_SC_CLR_VLINK) |
| 1058 | fcoe_ctlr_recv_clr_vlink(fip, fiph); |
| 1059 | kfree_skb(skb); |
| 1060 | return 0; |
| 1061 | drop: |
| 1062 | kfree_skb(skb); |
| 1063 | return -1; |
| 1064 | } |
| 1065 | |
| 1066 | /** |
| 1067 | * fcoe_ctlr_select() - Select the best FCF, if possible. |
| 1068 | * @fip: FCoE controller. |
| 1069 | * |
| 1070 | * If there are conflicting advertisements, no FCF can be chosen. |
| 1071 | * |
| 1072 | * Called with lock held. |
| 1073 | */ |
| 1074 | static void fcoe_ctlr_select(struct fcoe_ctlr *fip) |
| 1075 | { |
| 1076 | struct fcoe_fcf *fcf; |
| 1077 | struct fcoe_fcf *best = NULL; |
| 1078 | |
| 1079 | list_for_each_entry(fcf, &fip->fcfs, list) { |
Robert Love | 650bd12 | 2009-06-10 15:31:05 -0700 | [diff] [blame] | 1080 | LIBFCOE_FIP_DBG("consider FCF for fab %llx VFID %d map %x " |
| 1081 | "val %d\n", fcf->fabric_name, fcf->vfid, |
| 1082 | fcf->fc_map, fcoe_ctlr_mtu_valid(fcf)); |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 1083 | if (!fcoe_ctlr_fcf_usable(fcf)) { |
Robert Love | 650bd12 | 2009-06-10 15:31:05 -0700 | [diff] [blame] | 1084 | LIBFCOE_FIP_DBG("FCF for fab %llx map %x %svalid " |
| 1085 | "%savailable\n", fcf->fabric_name, |
| 1086 | fcf->fc_map, (fcf->flags & FIP_FL_SOL) |
| 1087 | ? "" : "in", (fcf->flags & FIP_FL_AVAIL) |
| 1088 | ? "" : "un"); |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 1089 | continue; |
| 1090 | } |
| 1091 | if (!best) { |
| 1092 | best = fcf; |
| 1093 | continue; |
| 1094 | } |
| 1095 | if (fcf->fabric_name != best->fabric_name || |
| 1096 | fcf->vfid != best->vfid || |
| 1097 | fcf->fc_map != best->fc_map) { |
Robert Love | 650bd12 | 2009-06-10 15:31:05 -0700 | [diff] [blame] | 1098 | LIBFCOE_FIP_DBG("Conflicting fabric, VFID, " |
| 1099 | "or FC-MAP\n"); |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 1100 | return; |
| 1101 | } |
| 1102 | if (fcf->pri < best->pri) |
| 1103 | best = fcf; |
| 1104 | } |
| 1105 | fip->sel_fcf = best; |
| 1106 | } |
| 1107 | |
| 1108 | /** |
| 1109 | * fcoe_ctlr_timeout() - FIP timer function. |
| 1110 | * @arg: &fcoe_ctlr pointer. |
| 1111 | * |
| 1112 | * Ages FCFs. Triggers FCF selection if possible. Sends keep-alives. |
| 1113 | */ |
| 1114 | static void fcoe_ctlr_timeout(unsigned long arg) |
| 1115 | { |
| 1116 | struct fcoe_ctlr *fip = (struct fcoe_ctlr *)arg; |
| 1117 | struct fcoe_fcf *sel; |
| 1118 | struct fcoe_fcf *fcf; |
| 1119 | unsigned long next_timer = jiffies + msecs_to_jiffies(FIP_VN_KA_PERIOD); |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 1120 | |
| 1121 | spin_lock_bh(&fip->lock); |
| 1122 | if (fip->state == FIP_ST_DISABLED) { |
| 1123 | spin_unlock_bh(&fip->lock); |
| 1124 | return; |
| 1125 | } |
| 1126 | |
| 1127 | fcf = fip->sel_fcf; |
| 1128 | fcoe_ctlr_age_fcfs(fip); |
| 1129 | |
| 1130 | sel = fip->sel_fcf; |
| 1131 | if (!sel && fip->sel_time && time_after_eq(jiffies, fip->sel_time)) { |
| 1132 | fcoe_ctlr_select(fip); |
| 1133 | sel = fip->sel_fcf; |
| 1134 | fip->sel_time = 0; |
| 1135 | } |
| 1136 | |
| 1137 | if (sel != fcf) { |
| 1138 | fcf = sel; /* the old FCF may have been freed */ |
| 1139 | if (sel) { |
Robert Love | 650bd12 | 2009-06-10 15:31:05 -0700 | [diff] [blame] | 1140 | printk(KERN_INFO "libfcoe: host%d: FIP selected " |
Johannes Berg | 66d6fae | 2009-07-15 17:21:14 +0200 | [diff] [blame] | 1141 | "Fibre-Channel Forwarder MAC %pM\n", |
| 1142 | fip->lp->host->host_no, sel->fcf_mac); |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 1143 | memcpy(fip->dest_addr, sel->fcf_mac, ETH_ALEN); |
| 1144 | fip->port_ka_time = jiffies + |
| 1145 | msecs_to_jiffies(FIP_VN_KA_PERIOD); |
| 1146 | fip->ctlr_ka_time = jiffies + sel->fka_period; |
| 1147 | fip->link = 1; |
| 1148 | } else { |
Robert Love | 650bd12 | 2009-06-10 15:31:05 -0700 | [diff] [blame] | 1149 | printk(KERN_NOTICE "libfcoe: host%d: " |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 1150 | "FIP Fibre-Channel Forwarder timed out. " |
| 1151 | "Starting FCF discovery.\n", |
| 1152 | fip->lp->host->host_no); |
| 1153 | fip->link = 0; |
| 1154 | } |
| 1155 | schedule_work(&fip->link_work); |
| 1156 | } |
| 1157 | |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 1158 | if (sel) { |
| 1159 | if (time_after_eq(jiffies, fip->ctlr_ka_time)) { |
| 1160 | fip->ctlr_ka_time = jiffies + sel->fka_period; |
Chris Leech | 11b5618 | 2009-11-03 11:46:29 -0800 | [diff] [blame^] | 1161 | fip->send_ctlr_ka = 1; |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 1162 | } |
| 1163 | if (time_after(next_timer, fip->ctlr_ka_time)) |
| 1164 | next_timer = fip->ctlr_ka_time; |
| 1165 | |
| 1166 | if (time_after_eq(jiffies, fip->port_ka_time)) { |
| 1167 | fip->port_ka_time += jiffies + |
| 1168 | msecs_to_jiffies(FIP_VN_KA_PERIOD); |
Chris Leech | 11b5618 | 2009-11-03 11:46:29 -0800 | [diff] [blame^] | 1169 | fip->send_port_ka = 1; |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 1170 | } |
| 1171 | if (time_after(next_timer, fip->port_ka_time)) |
| 1172 | next_timer = fip->port_ka_time; |
| 1173 | mod_timer(&fip->timer, next_timer); |
| 1174 | } else if (fip->sel_time) { |
| 1175 | next_timer = fip->sel_time + |
| 1176 | msecs_to_jiffies(FCOE_CTLR_START_DELAY); |
| 1177 | mod_timer(&fip->timer, next_timer); |
| 1178 | } |
Chris Leech | 11b5618 | 2009-11-03 11:46:29 -0800 | [diff] [blame^] | 1179 | if (fip->send_ctlr_ka || fip->send_port_ka) |
| 1180 | schedule_work(&fip->link_work); |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 1181 | spin_unlock_bh(&fip->lock); |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 1182 | } |
| 1183 | |
| 1184 | /** |
| 1185 | * fcoe_ctlr_link_work() - worker thread function for link changes. |
| 1186 | * @work: pointer to link_work member inside &fcoe_ctlr. |
| 1187 | * |
| 1188 | * See if the link status has changed and if so, report it. |
| 1189 | * |
| 1190 | * This is here because fc_linkup() and fc_linkdown() must not |
| 1191 | * be called from the timer directly, since they use a mutex. |
| 1192 | */ |
| 1193 | static void fcoe_ctlr_link_work(struct work_struct *work) |
| 1194 | { |
| 1195 | struct fcoe_ctlr *fip; |
Chris Leech | 11b5618 | 2009-11-03 11:46:29 -0800 | [diff] [blame^] | 1196 | struct fc_lport *vport; |
| 1197 | u8 *mac; |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 1198 | int link; |
| 1199 | int last_link; |
| 1200 | |
| 1201 | fip = container_of(work, struct fcoe_ctlr, link_work); |
| 1202 | spin_lock_bh(&fip->lock); |
| 1203 | last_link = fip->last_link; |
| 1204 | link = fip->link; |
| 1205 | fip->last_link = link; |
| 1206 | spin_unlock_bh(&fip->lock); |
| 1207 | |
| 1208 | if (last_link != link) { |
| 1209 | if (link) |
| 1210 | fc_linkup(fip->lp); |
| 1211 | else |
| 1212 | fcoe_ctlr_reset(fip, FIP_ST_LINK_WAIT); |
| 1213 | } |
Chris Leech | 11b5618 | 2009-11-03 11:46:29 -0800 | [diff] [blame^] | 1214 | |
| 1215 | if (fip->send_ctlr_ka) { |
| 1216 | fip->send_ctlr_ka = 0; |
| 1217 | fcoe_ctlr_send_keep_alive(fip, NULL, 0, fip->ctl_src_addr); |
| 1218 | } |
| 1219 | if (fip->send_port_ka) { |
| 1220 | fip->send_port_ka = 0; |
| 1221 | mutex_lock(&fip->lp->lp_mutex); |
| 1222 | mac = fip->get_src_addr(fip->lp); |
| 1223 | fcoe_ctlr_send_keep_alive(fip, fip->lp, 1, mac); |
| 1224 | list_for_each_entry(vport, &fip->lp->vports, list) { |
| 1225 | mac = fip->get_src_addr(vport); |
| 1226 | fcoe_ctlr_send_keep_alive(fip, vport, 1, mac); |
| 1227 | } |
| 1228 | mutex_unlock(&fip->lp->lp_mutex); |
| 1229 | } |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 1230 | } |
| 1231 | |
| 1232 | /** |
| 1233 | * fcoe_ctlr_recv_work() - Worker thread function for receiving FIP frames. |
| 1234 | * @recv_work: pointer to recv_work member inside &fcoe_ctlr. |
| 1235 | */ |
| 1236 | static void fcoe_ctlr_recv_work(struct work_struct *recv_work) |
| 1237 | { |
| 1238 | struct fcoe_ctlr *fip; |
| 1239 | struct sk_buff *skb; |
| 1240 | |
| 1241 | fip = container_of(recv_work, struct fcoe_ctlr, recv_work); |
| 1242 | spin_lock_bh(&fip->fip_recv_list.lock); |
| 1243 | while ((skb = __skb_dequeue(&fip->fip_recv_list))) { |
| 1244 | spin_unlock_bh(&fip->fip_recv_list.lock); |
| 1245 | fcoe_ctlr_recv_handler(fip, skb); |
| 1246 | spin_lock_bh(&fip->fip_recv_list.lock); |
| 1247 | } |
| 1248 | spin_unlock_bh(&fip->fip_recv_list.lock); |
| 1249 | } |
| 1250 | |
| 1251 | /** |
| 1252 | * fcoe_ctlr_recv_flogi() - snoop Pre-FIP receipt of FLOGI response or request. |
| 1253 | * @fip: FCoE controller. |
Chris Leech | 11b5618 | 2009-11-03 11:46:29 -0800 | [diff] [blame^] | 1254 | * @lport: libfc fc_lport instance received on |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 1255 | * @fp: FC frame. |
| 1256 | * @sa: Ethernet source MAC address from received FCoE frame. |
| 1257 | * |
| 1258 | * Snoop potential response to FLOGI or even incoming FLOGI. |
| 1259 | * |
| 1260 | * The caller has checked that we are waiting for login as indicated |
| 1261 | * by fip->flogi_oxid != FC_XID_UNKNOWN. |
| 1262 | * |
| 1263 | * The caller is responsible for freeing the frame. |
| 1264 | * |
| 1265 | * Return non-zero if the frame should not be delivered to libfc. |
| 1266 | */ |
Chris Leech | 11b5618 | 2009-11-03 11:46:29 -0800 | [diff] [blame^] | 1267 | int fcoe_ctlr_recv_flogi(struct fcoe_ctlr *fip, struct fc_lport *lport, |
| 1268 | struct fc_frame *fp, u8 *sa) |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 1269 | { |
| 1270 | struct fc_frame_header *fh; |
| 1271 | u8 op; |
| 1272 | u8 mac[ETH_ALEN]; |
| 1273 | |
| 1274 | fh = fc_frame_header_get(fp); |
| 1275 | if (fh->fh_type != FC_TYPE_ELS) |
| 1276 | return 0; |
| 1277 | |
| 1278 | op = fc_frame_payload_op(fp); |
| 1279 | if (op == ELS_LS_ACC && fh->fh_r_ctl == FC_RCTL_ELS_REP && |
| 1280 | fip->flogi_oxid == ntohs(fh->fh_ox_id)) { |
| 1281 | |
| 1282 | spin_lock_bh(&fip->lock); |
| 1283 | if (fip->state != FIP_ST_AUTO && fip->state != FIP_ST_NON_FIP) { |
| 1284 | spin_unlock_bh(&fip->lock); |
| 1285 | return -EINVAL; |
| 1286 | } |
| 1287 | fip->state = FIP_ST_NON_FIP; |
Robert Love | 650bd12 | 2009-06-10 15:31:05 -0700 | [diff] [blame] | 1288 | LIBFCOE_FIP_DBG("received FLOGI LS_ACC using non-FIP mode\n"); |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 1289 | |
| 1290 | /* |
| 1291 | * FLOGI accepted. |
| 1292 | * If the src mac addr is FC_OUI-based, then we mark the |
| 1293 | * address_mode flag to use FC_OUI-based Ethernet DA. |
| 1294 | * Otherwise we use the FCoE gateway addr |
| 1295 | */ |
| 1296 | if (!compare_ether_addr(sa, (u8[6])FC_FCOE_FLOGI_MAC)) { |
| 1297 | fip->map_dest = 1; |
| 1298 | } else { |
| 1299 | memcpy(fip->dest_addr, sa, ETH_ALEN); |
| 1300 | fip->map_dest = 0; |
| 1301 | } |
| 1302 | fip->flogi_oxid = FC_XID_UNKNOWN; |
Chris Leech | 11b5618 | 2009-11-03 11:46:29 -0800 | [diff] [blame^] | 1303 | fc_fcoe_set_mac(mac, fh->fh_d_id); |
| 1304 | fip->update_mac(lport, mac); |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 1305 | spin_unlock_bh(&fip->lock); |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 1306 | } else if (op == ELS_FLOGI && fh->fh_r_ctl == FC_RCTL_ELS_REQ && sa) { |
| 1307 | /* |
| 1308 | * Save source MAC for point-to-point responses. |
| 1309 | */ |
| 1310 | spin_lock_bh(&fip->lock); |
| 1311 | if (fip->state == FIP_ST_AUTO || fip->state == FIP_ST_NON_FIP) { |
| 1312 | memcpy(fip->dest_addr, sa, ETH_ALEN); |
| 1313 | fip->map_dest = 0; |
| 1314 | if (fip->state == FIP_ST_NON_FIP) |
Robert Love | 650bd12 | 2009-06-10 15:31:05 -0700 | [diff] [blame] | 1315 | LIBFCOE_FIP_DBG("received FLOGI REQ, " |
Joe Eykholt | 97c8389 | 2009-03-17 11:42:40 -0700 | [diff] [blame] | 1316 | "using non-FIP mode\n"); |
| 1317 | fip->state = FIP_ST_NON_FIP; |
| 1318 | } |
| 1319 | spin_unlock_bh(&fip->lock); |
| 1320 | } |
| 1321 | return 0; |
| 1322 | } |
| 1323 | EXPORT_SYMBOL(fcoe_ctlr_recv_flogi); |
| 1324 | |
Vasu Dev | 5e80f7f | 2009-03-17 11:42:18 -0700 | [diff] [blame] | 1325 | /** |
| 1326 | * fcoe_wwn_from_mac() - Converts 48-bit IEEE MAC address to 64-bit FC WWN. |
| 1327 | * @mac: mac address |
| 1328 | * @scheme: check port |
| 1329 | * @port: port indicator for converting |
| 1330 | * |
| 1331 | * Returns: u64 fc world wide name |
| 1332 | */ |
| 1333 | u64 fcoe_wwn_from_mac(unsigned char mac[MAX_ADDR_LEN], |
| 1334 | unsigned int scheme, unsigned int port) |
| 1335 | { |
| 1336 | u64 wwn; |
| 1337 | u64 host_mac; |
| 1338 | |
| 1339 | /* The MAC is in NO, so flip only the low 48 bits */ |
| 1340 | host_mac = ((u64) mac[0] << 40) | |
| 1341 | ((u64) mac[1] << 32) | |
| 1342 | ((u64) mac[2] << 24) | |
| 1343 | ((u64) mac[3] << 16) | |
| 1344 | ((u64) mac[4] << 8) | |
| 1345 | (u64) mac[5]; |
| 1346 | |
| 1347 | WARN_ON(host_mac >= (1ULL << 48)); |
| 1348 | wwn = host_mac | ((u64) scheme << 60); |
| 1349 | switch (scheme) { |
| 1350 | case 1: |
| 1351 | WARN_ON(port != 0); |
| 1352 | break; |
| 1353 | case 2: |
| 1354 | WARN_ON(port >= 0xfff); |
| 1355 | wwn |= (u64) port << 48; |
| 1356 | break; |
| 1357 | default: |
| 1358 | WARN_ON(1); |
| 1359 | break; |
| 1360 | } |
| 1361 | |
| 1362 | return wwn; |
| 1363 | } |
| 1364 | EXPORT_SYMBOL_GPL(fcoe_wwn_from_mac); |
| 1365 | |
| 1366 | /** |
| 1367 | * fcoe_libfc_config() - sets up libfc related properties for lport |
| 1368 | * @lp: ptr to the fc_lport |
| 1369 | * @tt: libfc function template |
| 1370 | * |
| 1371 | * Returns : 0 for success |
| 1372 | */ |
| 1373 | int fcoe_libfc_config(struct fc_lport *lp, struct libfc_function_template *tt) |
| 1374 | { |
| 1375 | /* Set the function pointers set by the LLDD */ |
| 1376 | memcpy(&lp->tt, tt, sizeof(*tt)); |
| 1377 | if (fc_fcp_init(lp)) |
| 1378 | return -ENOMEM; |
| 1379 | fc_exch_init(lp); |
| 1380 | fc_elsct_init(lp); |
| 1381 | fc_lport_init(lp); |
| 1382 | fc_rport_init(lp); |
| 1383 | fc_disc_init(lp); |
| 1384 | |
| 1385 | return 0; |
| 1386 | } |
| 1387 | EXPORT_SYMBOL_GPL(fcoe_libfc_config); |
Chris Leech | 11b5618 | 2009-11-03 11:46:29 -0800 | [diff] [blame^] | 1388 | |