drivers/scsi/fcoe/fcoe_sysfs.c

   1 /*
   2  * Copyright(c) 2011 - 2012 Intel Corporation. All rights reserved.
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms and conditions of the GNU General Public License,
   6  * version 2, as published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope it will be useful, but WITHOUT
   9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  10  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  11  * more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along with
  14  * this program; if not, write to the Free Software Foundation, Inc.,
  15  * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
  16  *
  17  * Maintained at www.Open-FCoE.org
  18  */
  19
  20 #include <linux/module.h>
  21 #include <linux/types.h>
  22 #include <linux/kernel.h>
  23 #include <linux/etherdevice.h>
  24 #include <linux/ctype.h>
  25
  26 #include <scsi/fcoe_sysfs.h>
  27 #include <scsi/libfcoe.h>
  28
  29 /*
  30  * OK to include local libfcoe.h for debug_logging, but cannot include
  31  * <scsi/libfcoe.h> otherwise non-netdev based fcoe solutions would have
  32  * have to include more than fcoe_sysfs.h.
  33  */
  34 #include "libfcoe.h"
  35
  36 static atomic_t ctlr_num;
  37 static atomic_t fcf_num;
  38
  39 /*
  40  * fcoe_fcf_dev_loss_tmo: the default number of seconds that fcoe sysfs
  41  * should insulate the loss of a fcf.
  42  */
  43 static unsigned int fcoe_fcf_dev_loss_tmo = 1800;  /* seconds */
  44
  45 module_param_named(fcf_dev_loss_tmo, fcoe_fcf_dev_loss_tmo,
  46                    uint, S_IRUGO|S_IWUSR);
  47 MODULE_PARM_DESC(fcf_dev_loss_tmo,
  48                  "Maximum number of seconds that libfcoe should"
  49                  " insulate the loss of a fcf. Once this value is"
  50                  " exceeded, the fcf is removed.");
  51
  52 /*
  53  * These are used by the fcoe_*_show_function routines, they
  54  * are intentionally placed in the .c file as they're not intended
  55  * for use throughout the code.
  56  */
  57 #define fcoe_ctlr_id(x)                         \
  58         ((x)->id)
  59 #define fcoe_ctlr_work_q_name(x)                \
  60         ((x)->work_q_name)
  61 #define fcoe_ctlr_work_q(x)                     \
  62         ((x)->work_q)
  63 #define fcoe_ctlr_devloss_work_q_name(x)        \
  64         ((x)->devloss_work_q_name)
  65 #define fcoe_ctlr_devloss_work_q(x)             \
  66         ((x)->devloss_work_q)
  67 #define fcoe_ctlr_mode(x)                       \
  68         ((x)->mode)
  69 #define fcoe_ctlr_fcf_dev_loss_tmo(x)           \
  70         ((x)->fcf_dev_loss_tmo)
  71 #define fcoe_ctlr_link_fail(x)                  \
  72         ((x)->lesb.lesb_link_fail)
  73 #define fcoe_ctlr_vlink_fail(x)                 \
  74         ((x)->lesb.lesb_vlink_fail)
  75 #define fcoe_ctlr_miss_fka(x)                   \
  76         ((x)->lesb.lesb_miss_fka)
  77 #define fcoe_ctlr_symb_err(x)                   \
  78         ((x)->lesb.lesb_symb_err)
  79 #define fcoe_ctlr_err_block(x)                  \
  80         ((x)->lesb.lesb_err_block)
  81 #define fcoe_ctlr_fcs_error(x)                  \
  82         ((x)->lesb.lesb_fcs_error)
  83 #define fcoe_ctlr_enabled(x)                    \
  84         ((x)->enabled)
  85 #define fcoe_fcf_state(x)                       \
  86         ((x)->state)
  87 #define fcoe_fcf_fabric_name(x)                 \
  88         ((x)->fabric_name)
  89 #define fcoe_fcf_switch_name(x)                 \
  90         ((x)->switch_name)
  91 #define fcoe_fcf_fc_map(x)                      \
  92         ((x)->fc_map)
  93 #define fcoe_fcf_vfid(x)                        \
  94         ((x)->vfid)
  95 #define fcoe_fcf_mac(x)                         \
  96         ((x)->mac)
  97 #define fcoe_fcf_priority(x)                    \
  98         ((x)->priority)
  99 #define fcoe_fcf_fka_period(x)                  \
 100         ((x)->fka_period)
 101 #define fcoe_fcf_dev_loss_tmo(x)                \
 102         ((x)->dev_loss_tmo)
 103 #define fcoe_fcf_selected(x)                    \
 104         ((x)->selected)
 105 #define fcoe_fcf_vlan_id(x)                     \
 106         ((x)->vlan_id)
 107
 108 /*
 109  * dev_loss_tmo attribute
 110  */
 111 static int fcoe_str_to_dev_loss(const char *buf, unsigned long *val)
 112 {
 113         int ret;
 114
 115         ret = kstrtoul(buf, 0, val);
 116         if (ret)
 117                 return -EINVAL;
 118         /*
 119          * Check for overflow; dev_loss_tmo is u32
 120          */
 121         if (*val > UINT_MAX)
 122                 return -EINVAL;
 123
 124         return 0;
 125 }
 126
 127 static int fcoe_fcf_set_dev_loss_tmo(struct fcoe_fcf_device *fcf,
 128                                      unsigned long val)
 129 {
 130         if ((fcf->state == FCOE_FCF_STATE_UNKNOWN) ||
 131             (fcf->state == FCOE_FCF_STATE_DISCONNECTED) ||
 132             (fcf->state == FCOE_FCF_STATE_DELETED))
 133                 return -EBUSY;
 134         /*
 135          * Check for overflow; dev_loss_tmo is u32
 136          */
 137         if (val > UINT_MAX)
 138                 return -EINVAL;
 139
 140         fcoe_fcf_dev_loss_tmo(fcf) = val;
 141         return 0;
 142 }
 143
 144 #define FCOE_DEVICE_ATTR(_prefix, _name, _mode, _show, _store)  \
 145 struct device_attribute device_attr_fcoe_##_prefix##_##_name =  \
 146         __ATTR(_name, _mode, _show, _store)
 147
 148 #define fcoe_ctlr_show_function(field, format_string, sz, cast) \
 149 static ssize_t show_fcoe_ctlr_device_##field(struct device *dev, \
 150                                             struct device_attribute *attr, \
 151                                             char *buf)                  \
 152 {                                                                       \
 153         struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);               \
 154         if (ctlr->f->get_fcoe_ctlr_##field)                             \
 155                 ctlr->f->get_fcoe_ctlr_##field(ctlr);                   \
 156         return snprintf(buf, sz, format_string,                         \
 157                         cast fcoe_ctlr_##field(ctlr));                  \
 158 }
 159
 160 #define fcoe_fcf_show_function(field, format_string, sz, cast)  \
 161 static ssize_t show_fcoe_fcf_device_##field(struct device *dev, \
 162                                            struct device_attribute *attr, \
 163                                            char *buf)                   \
 164 {                                                                       \
 165         struct fcoe_fcf_device *fcf = dev_to_fcf(dev);                  \
 166         struct fcoe_ctlr_device *ctlr = fcoe_fcf_dev_to_ctlr_dev(fcf);  \
 167         if (ctlr->f->get_fcoe_fcf_##field)                              \
 168                 ctlr->f->get_fcoe_fcf_##field(fcf);                     \
 169         return snprintf(buf, sz, format_string,                         \
 170                         cast fcoe_fcf_##field(fcf));                    \
 171 }
 172
 173 #define fcoe_ctlr_private_show_function(field, format_string, sz, cast) \
 174 static ssize_t show_fcoe_ctlr_device_##field(struct device *dev, \
 175                                             struct device_attribute *attr, \
 176                                             char *buf)                  \
 177 {                                                                       \
 178         struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);               \
 179         return snprintf(buf, sz, format_string, cast fcoe_ctlr_##field(ctlr)); \
 180 }
 181
 182 #define fcoe_fcf_private_show_function(field, format_string, sz, cast)  \
 183 static ssize_t show_fcoe_fcf_device_##field(struct device *dev, \
 184                                            struct device_attribute *attr, \
 185                                            char *buf)                   \
 186 {                                                               \
 187         struct fcoe_fcf_device *fcf = dev_to_fcf(dev);                  \
 188         return snprintf(buf, sz, format_string, cast fcoe_fcf_##field(fcf)); \
 189 }
 190
 191 #define fcoe_ctlr_private_rd_attr(field, format_string, sz)             \
 192         fcoe_ctlr_private_show_function(field, format_string, sz, )     \
 193         static FCOE_DEVICE_ATTR(ctlr, field, S_IRUGO,                   \
 194                                 show_fcoe_ctlr_device_##field, NULL)
 195
 196 #define fcoe_ctlr_rd_attr(field, format_string, sz)                     \
 197         fcoe_ctlr_show_function(field, format_string, sz, )             \
 198         static FCOE_DEVICE_ATTR(ctlr, field, S_IRUGO,                   \
 199                                 show_fcoe_ctlr_device_##field, NULL)
 200
 201 #define fcoe_fcf_rd_attr(field, format_string, sz)                      \
 202         fcoe_fcf_show_function(field, format_string, sz, )              \
 203         static FCOE_DEVICE_ATTR(fcf, field, S_IRUGO,                    \
 204                                 show_fcoe_fcf_device_##field, NULL)
 205
 206 #define fcoe_fcf_private_rd_attr(field, format_string, sz)              \
 207         fcoe_fcf_private_show_function(field, format_string, sz, )      \
 208         static FCOE_DEVICE_ATTR(fcf, field, S_IRUGO,                    \
 209                                 show_fcoe_fcf_device_##field, NULL)
 210
 211 #define fcoe_ctlr_private_rd_attr_cast(field, format_string, sz, cast)  \
 212         fcoe_ctlr_private_show_function(field, format_string, sz, (cast)) \
 213         static FCOE_DEVICE_ATTR(ctlr, field, S_IRUGO,                   \
 214                                 show_fcoe_ctlr_device_##field, NULL)
 215
 216 #define fcoe_fcf_private_rd_attr_cast(field, format_string, sz, cast)   \
 217         fcoe_fcf_private_show_function(field, format_string, sz, (cast)) \
 218         static FCOE_DEVICE_ATTR(fcf, field, S_IRUGO,                    \
 219                                 show_fcoe_fcf_device_##field, NULL)
 220
 221 #define fcoe_enum_name_search(title, table_type, table)                 \
 222 static const char *get_fcoe_##title##_name(enum table_type table_key)   \
 223 {                                                                       \
 224         if (table_key < 0 || table_key >= ARRAY_SIZE(table))            \
 225                 return NULL;                                            \
 226         return table[table_key];                                        \
 227 }
 228
 229 static char *fip_conn_type_names[] = {
 230         [ FIP_CONN_TYPE_UNKNOWN ] = "Unknown",
 231         [ FIP_CONN_TYPE_FABRIC ]  = "Fabric",
 232         [ FIP_CONN_TYPE_VN2VN ]   = "VN2VN",
 233 };
 234 fcoe_enum_name_search(ctlr_mode, fip_conn_type, fip_conn_type_names)
 235
 236 static enum fip_conn_type fcoe_parse_mode(const char *buf)
 237 {
 238         int i;
 239
 240         for (i = 0; i < ARRAY_SIZE(fip_conn_type_names); i++) {
 241                 if (strcasecmp(buf, fip_conn_type_names[i]) == 0)
 242                         return i;
 243         }
 244
 245         return FIP_CONN_TYPE_UNKNOWN;
 246 }
 247
 248 static char *fcf_state_names[] = {
 249         [ FCOE_FCF_STATE_UNKNOWN ]      = "Unknown",
 250         [ FCOE_FCF_STATE_DISCONNECTED ] = "Disconnected",
 251         [ FCOE_FCF_STATE_CONNECTED ]    = "Connected",
 252 };
 253 fcoe_enum_name_search(fcf_state, fcf_state, fcf_state_names)
 254 #define FCOE_FCF_STATE_MAX_NAMELEN 50
 255
 256 static ssize_t show_fcf_state(struct device *dev,
 257                               struct device_attribute *attr,
 258                               char *buf)
 259 {
 260         struct fcoe_fcf_device *fcf = dev_to_fcf(dev);
 261         const char *name;
 262         name = get_fcoe_fcf_state_name(fcf->state);
 263         if (!name)
 264                 return -EINVAL;
 265         return snprintf(buf, FCOE_FCF_STATE_MAX_NAMELEN, "%s\n", name);
 266 }
 267 static FCOE_DEVICE_ATTR(fcf, state, S_IRUGO, show_fcf_state, NULL);
 268
 269 #define FCOE_MAX_MODENAME_LEN 20
 270 static ssize_t show_ctlr_mode(struct device *dev,
 271                               struct device_attribute *attr,
 272                               char *buf)
 273 {
 274         struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);
 275         const char *name;
 276
 277         name = get_fcoe_ctlr_mode_name(ctlr->mode);
 278         if (!name)
 279                 return -EINVAL;
 280         return snprintf(buf, FCOE_MAX_MODENAME_LEN,
 281                         "%s\n", name);
 282 }
 283
 284 static ssize_t store_ctlr_mode(struct device *dev,
 285                                struct device_attribute *attr,
 286                                const char *buf, size_t count)
 287 {
 288         struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);
 289         char mode[FCOE_MAX_MODENAME_LEN + 1];
 290
 291         if (count > FCOE_MAX_MODENAME_LEN)
 292                 return -EINVAL;
 293
 294         strncpy(mode, buf, count);
 295
 296         if (mode[count - 1] == '\n')
 297                 mode[count - 1] = '\0';
 298         else
 299                 mode[count] = '\0';
 300
 301         switch (ctlr->enabled) {
 302         case FCOE_CTLR_ENABLED:
 303                 LIBFCOE_SYSFS_DBG(ctlr, "Cannot change mode when enabled.\n");
 304                 return -EBUSY;
 305         case FCOE_CTLR_DISABLED:
 306                 if (!ctlr->f->set_fcoe_ctlr_mode) {
 307                         LIBFCOE_SYSFS_DBG(ctlr,
 308                                           "Mode change not supported by LLD.\n");
 309                         return -ENOTSUPP;
 310                 }
 311
 312                 ctlr->mode = fcoe_parse_mode(mode);
 313                 if (ctlr->mode == FIP_CONN_TYPE_UNKNOWN) {
 314                         LIBFCOE_SYSFS_DBG(ctlr, "Unknown mode %s provided.\n",
 315                                           buf);
 316                         return -EINVAL;
 317                 }
 318
 319                 ctlr->f->set_fcoe_ctlr_mode(ctlr);
 320                 LIBFCOE_SYSFS_DBG(ctlr, "Mode changed to %s.\n", buf);
 321
 322                 return count;
 323         case FCOE_CTLR_UNUSED:
 324         default:
 325                 LIBFCOE_SYSFS_DBG(ctlr, "Mode change not supported.\n");
 326                 return -ENOTSUPP;
 327         };
 328 }
 329
 330 static FCOE_DEVICE_ATTR(ctlr, mode, S_IRUGO | S_IWUSR,
 331                         show_ctlr_mode, store_ctlr_mode);
 332
 333 static ssize_t store_ctlr_enabled(struct device *dev,
 334                                   struct device_attribute *attr,
 335                                   const char *buf, size_t count)
 336 {
 337         struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);
 338         bool enabled;
 339         int rc;
 340
 341         if (*buf == '1')
 342                 enabled = true;
 343         else if (*buf == '0')
 344                 enabled = false;
 345         else
 346                 return -EINVAL;
 347
 348         switch (ctlr->enabled) {
 349         case FCOE_CTLR_ENABLED:
 350                 if (enabled)
 351                         return count;
 352                 ctlr->enabled = FCOE_CTLR_DISABLED;
 353                 break;
 354         case FCOE_CTLR_DISABLED:
 355                 if (!enabled)
 356                         return count;
 357                 ctlr->enabled = FCOE_CTLR_ENABLED;
 358                 break;
 359         case FCOE_CTLR_UNUSED:
 360                 return -ENOTSUPP;
 361         };
 362
 363         rc = ctlr->f->set_fcoe_ctlr_enabled(ctlr);
 364         if (rc)
 365                 return rc;
 366
 367         return count;
 368 }
 369
 370 static char *ctlr_enabled_state_names[] = {
 371         [ FCOE_CTLR_ENABLED ]  = "1",
 372         [ FCOE_CTLR_DISABLED ] = "0",
 373 };
 374 fcoe_enum_name_search(ctlr_enabled_state, ctlr_enabled_state,
 375                       ctlr_enabled_state_names)
 376 #define FCOE_CTLR_ENABLED_MAX_NAMELEN 50
 377
 378 static ssize_t show_ctlr_enabled_state(struct device *dev,
 379                                        struct device_attribute *attr,
 380                                        char *buf)
 381 {
 382         struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);
 383         const char *name;
 384
 385         name = get_fcoe_ctlr_enabled_state_name(ctlr->enabled);
 386         if (!name)
 387                 return -EINVAL;
 388         return snprintf(buf, FCOE_CTLR_ENABLED_MAX_NAMELEN,
 389                         "%s\n", name);
 390 }
 391
 392 static FCOE_DEVICE_ATTR(ctlr, enabled, S_IRUGO | S_IWUSR,
 393                         show_ctlr_enabled_state,
 394                         store_ctlr_enabled);
 395
 396 static ssize_t store_ctlr_fip_resp(struct device *dev,
 397                               struct device_attribute *attr,
 398                               const char *buf, size_t count)
 399 {
 400         struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);
 401         struct fcoe_ctlr *fip = fcoe_ctlr_device_priv(ctlr);
 402
 403         mutex_lock(&fip->ctlr_mutex);
 404         if ((buf[1] == '\0') || ((buf[1] == '\n') && (buf[2] == '\0'))) {
 405                 if (buf[0] == '1') {
 406                         fip->fip_resp = 1;
 407                         mutex_unlock(&fip->ctlr_mutex);
 408                         return count;
 409                 }
 410                 if (buf[0] == '0') {
 411                         fip->fip_resp = 0;
 412                         mutex_unlock(&fip->ctlr_mutex);
 413                         return count;
 414                 }
 415         }
 416         mutex_unlock(&fip->ctlr_mutex);
 417         return -EINVAL;
 418 }
 419
 420 static ssize_t show_ctlr_fip_resp(struct device *dev,
 421                                   struct device_attribute *attr,
 422                                   char *buf)
 423 {
 424         struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);
 425         struct fcoe_ctlr *fip = fcoe_ctlr_device_priv(ctlr);
 426
 427         return sprintf(buf, "%d\n", fip->fip_resp ? 1 : 0);
 428 }
 429
 430 static FCOE_DEVICE_ATTR(ctlr, fip_vlan_responder, S_IRUGO | S_IWUSR,
 431                         show_ctlr_fip_resp,
 432                         store_ctlr_fip_resp);
 433
 434 static ssize_t
 435 fcoe_ctlr_var_store(u32 *var, const char *buf, size_t count)
 436 {
 437         int err;
 438         unsigned long v;
 439
 440         err = kstrtoul(buf, 10, &v);
 441         if (err || v > UINT_MAX)
 442                 return -EINVAL;
 443
 444         *var = v;
 445
 446         return count;
 447 }
 448
 449 static ssize_t store_ctlr_r_a_tov(struct device *dev,
 450                                   struct device_attribute *attr,
 451                                   const char *buf, size_t count)
 452 {
 453         struct fcoe_ctlr_device *ctlr_dev = dev_to_ctlr(dev);
 454         struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev);
 455
 456         if (ctlr_dev->enabled == FCOE_CTLR_ENABLED)
 457                 return -EBUSY;
 458         if (ctlr_dev->enabled == FCOE_CTLR_DISABLED)
 459                 return fcoe_ctlr_var_store(&ctlr->lp->r_a_tov, buf, count);
 460         return -ENOTSUPP;
 461 }
 462
 463 static ssize_t show_ctlr_r_a_tov(struct device *dev,
 464                                  struct device_attribute *attr,
 465                                  char *buf)
 466 {
 467         struct fcoe_ctlr_device *ctlr_dev = dev_to_ctlr(dev);
 468         struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev);
 469
 470         return sprintf(buf, "%d\n", ctlr->lp->r_a_tov);
 471 }
 472
 473 static FCOE_DEVICE_ATTR(ctlr, r_a_tov, S_IRUGO | S_IWUSR,
 474                         show_ctlr_r_a_tov, store_ctlr_r_a_tov);
 475
 476 static ssize_t store_ctlr_e_d_tov(struct device *dev,
 477                                   struct device_attribute *attr,
 478                                   const char *buf, size_t count)
 479 {
 480         struct fcoe_ctlr_device *ctlr_dev = dev_to_ctlr(dev);
 481         struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev);
 482
 483         if (ctlr_dev->enabled == FCOE_CTLR_ENABLED)
 484                 return -EBUSY;
 485         if (ctlr_dev->enabled == FCOE_CTLR_DISABLED)
 486                 return fcoe_ctlr_var_store(&ctlr->lp->e_d_tov, buf, count);
 487         return -ENOTSUPP;
 488 }
 489
 490 static ssize_t show_ctlr_e_d_tov(struct device *dev,
 491                                  struct device_attribute *attr,
 492                                  char *buf)
 493 {
 494         struct fcoe_ctlr_device *ctlr_dev = dev_to_ctlr(dev);
 495         struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev);
 496
 497         return sprintf(buf, "%d\n", ctlr->lp->e_d_tov);
 498 }
 499
 500 static FCOE_DEVICE_ATTR(ctlr, e_d_tov, S_IRUGO | S_IWUSR,
 501                         show_ctlr_e_d_tov, store_ctlr_e_d_tov);
 502
 503 static ssize_t
 504 store_private_fcoe_ctlr_fcf_dev_loss_tmo(struct device *dev,
 505                                          struct device_attribute *attr,
 506                                          const char *buf, size_t count)
 507 {
 508         struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);
 509         struct fcoe_fcf_device *fcf;
 510         unsigned long val;
 511         int rc;
 512
 513         rc = fcoe_str_to_dev_loss(buf, &val);
 514         if (rc)
 515                 return rc;
 516
 517         fcoe_ctlr_fcf_dev_loss_tmo(ctlr) = val;
 518         mutex_lock(&ctlr->lock);
 519         list_for_each_entry(fcf, &ctlr->fcfs, peers)
 520                 fcoe_fcf_set_dev_loss_tmo(fcf, val);
 521         mutex_unlock(&ctlr->lock);
 522         return count;
 523 }
 524 fcoe_ctlr_private_show_function(fcf_dev_loss_tmo, "%d\n", 20, );
 525 static FCOE_DEVICE_ATTR(ctlr, fcf_dev_loss_tmo, S_IRUGO | S_IWUSR,
 526                         show_fcoe_ctlr_device_fcf_dev_loss_tmo,
 527                         store_private_fcoe_ctlr_fcf_dev_loss_tmo);
 528
 529 /* Link Error Status Block (LESB) */
 530 fcoe_ctlr_rd_attr(link_fail, "%u\n", 20);
 531 fcoe_ctlr_rd_attr(vlink_fail, "%u\n", 20);
 532 fcoe_ctlr_rd_attr(miss_fka, "%u\n", 20);
 533 fcoe_ctlr_rd_attr(symb_err, "%u\n", 20);
 534 fcoe_ctlr_rd_attr(err_block, "%u\n", 20);
 535 fcoe_ctlr_rd_attr(fcs_error, "%u\n", 20);
 536
 537 fcoe_fcf_private_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long);
 538 fcoe_fcf_private_rd_attr_cast(switch_name, "0x%llx\n", 20, unsigned long long);
 539 fcoe_fcf_private_rd_attr(priority, "%u\n", 20);
 540 fcoe_fcf_private_rd_attr(fc_map, "0x%x\n", 20);
 541 fcoe_fcf_private_rd_attr(vfid, "%u\n", 20);
 542 fcoe_fcf_private_rd_attr(mac, "%pM\n", 20);
 543 fcoe_fcf_private_rd_attr(fka_period, "%u\n", 20);
 544 fcoe_fcf_rd_attr(selected, "%u\n", 20);
 545 fcoe_fcf_rd_attr(vlan_id, "%u\n", 20);
 546
 547 fcoe_fcf_private_show_function(dev_loss_tmo, "%d\n", 20, )
 548 static ssize_t
 549 store_fcoe_fcf_dev_loss_tmo(struct device *dev, struct device_attribute *attr,
 550                             const char *buf, size_t count)
 551 {
 552         struct fcoe_fcf_device *fcf = dev_to_fcf(dev);
 553         unsigned long val;
 554         int rc;
 555
 556         rc = fcoe_str_to_dev_loss(buf, &val);
 557         if (rc)
 558                 return rc;
 559
 560         rc = fcoe_fcf_set_dev_loss_tmo(fcf, val);
 561         if (rc)
 562                 return rc;
 563         return count;
 564 }
 565 static FCOE_DEVICE_ATTR(fcf, dev_loss_tmo, S_IRUGO | S_IWUSR,
 566                         show_fcoe_fcf_device_dev_loss_tmo,
 567                         store_fcoe_fcf_dev_loss_tmo);
 568
 569 static struct attribute *fcoe_ctlr_lesb_attrs[] = {
 570         &device_attr_fcoe_ctlr_link_fail.attr,
 571         &device_attr_fcoe_ctlr_vlink_fail.attr,
 572         &device_attr_fcoe_ctlr_miss_fka.attr,
 573         &device_attr_fcoe_ctlr_symb_err.attr,
 574         &device_attr_fcoe_ctlr_err_block.attr,
 575         &device_attr_fcoe_ctlr_fcs_error.attr,
 576         NULL,
 577 };
 578
 579 static struct attribute_group fcoe_ctlr_lesb_attr_group = {
 580         .name = "lesb",
 581         .attrs = fcoe_ctlr_lesb_attrs,
 582 };
 583
 584 static struct attribute *fcoe_ctlr_attrs[] = {
 585         &device_attr_fcoe_ctlr_fip_vlan_responder.attr,
 586         &device_attr_fcoe_ctlr_fcf_dev_loss_tmo.attr,
 587         &device_attr_fcoe_ctlr_r_a_tov.attr,
 588         &device_attr_fcoe_ctlr_e_d_tov.attr,
 589         &device_attr_fcoe_ctlr_enabled.attr,
 590         &device_attr_fcoe_ctlr_mode.attr,
 591         NULL,
 592 };
 593
 594 static struct attribute_group fcoe_ctlr_attr_group = {
 595         .attrs = fcoe_ctlr_attrs,
 596 };
 597
 598 static const struct attribute_group *fcoe_ctlr_attr_groups[] = {
 599         &fcoe_ctlr_attr_group,
 600         &fcoe_ctlr_lesb_attr_group,
 601         NULL,
 602 };
 603
 604 static struct attribute *fcoe_fcf_attrs[] = {
 605         &device_attr_fcoe_fcf_fabric_name.attr,
 606         &device_attr_fcoe_fcf_switch_name.attr,
 607         &device_attr_fcoe_fcf_dev_loss_tmo.attr,
 608         &device_attr_fcoe_fcf_fc_map.attr,
 609         &device_attr_fcoe_fcf_vfid.attr,
 610         &device_attr_fcoe_fcf_mac.attr,
 611         &device_attr_fcoe_fcf_priority.attr,
 612         &device_attr_fcoe_fcf_fka_period.attr,
 613         &device_attr_fcoe_fcf_state.attr,
 614         &device_attr_fcoe_fcf_selected.attr,
 615         &device_attr_fcoe_fcf_vlan_id.attr,
 616         NULL
 617 };
 618
 619 static struct attribute_group fcoe_fcf_attr_group = {
 620         .attrs = fcoe_fcf_attrs,
 621 };
 622
 623 static const struct attribute_group *fcoe_fcf_attr_groups[] = {
 624         &fcoe_fcf_attr_group,
 625         NULL,
 626 };
 627
 628 static struct bus_type fcoe_bus_type;
 629
 630 static int fcoe_bus_match(struct device *dev,
 631                           struct device_driver *drv)
 632 {
 633         if (dev->bus == &fcoe_bus_type)
 634                 return 1;
 635         return 0;
 636 }
 637
 638 /**
 639  * fcoe_ctlr_device_release() - Release the FIP ctlr memory
 640  * @dev: Pointer to the FIP ctlr's embedded device
 641  *
 642  * Called when the last FIP ctlr reference is released.
 643  */
 644 static void fcoe_ctlr_device_release(struct device *dev)
 645 {
 646         struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);
 647         kfree(ctlr);
 648 }
 649
 650 /**
 651  * fcoe_fcf_device_release() - Release the FIP fcf memory
 652  * @dev: Pointer to the fcf's embedded device
 653  *
 654  * Called when the last FIP fcf reference is released.
 655  */
 656 static void fcoe_fcf_device_release(struct device *dev)
 657 {
 658         struct fcoe_fcf_device *fcf = dev_to_fcf(dev);
 659         kfree(fcf);
 660 }
 661
 662 static const struct device_type fcoe_ctlr_device_type = {
 663         .name = "fcoe_ctlr",
 664         .groups = fcoe_ctlr_attr_groups,
 665         .release = fcoe_ctlr_device_release,
 666 };
 667
 668 static const struct device_type fcoe_fcf_device_type = {
 669         .name = "fcoe_fcf",
 670         .groups = fcoe_fcf_attr_groups,
 671         .release = fcoe_fcf_device_release,
 672 };
 673
 674 static ssize_t ctlr_create_store(struct bus_type *bus, const char *buf,
 675                                  size_t count)
 676 {
 677         return fcoe_ctlr_create_store(bus, buf, count);
 678 }
 679 static BUS_ATTR_WO(ctlr_create);
 680
 681 static ssize_t ctlr_destroy_store(struct bus_type *bus, const char *buf,
 682                                   size_t count)
 683 {
 684         return fcoe_ctlr_destroy_store(bus, buf, count);
 685 }
 686 static BUS_ATTR_WO(ctlr_destroy);
 687
 688 static struct attribute *fcoe_bus_attrs[] = {
 689         &bus_attr_ctlr_create.attr,
 690         &bus_attr_ctlr_destroy.attr,
 691         NULL,
 692 };
 693 ATTRIBUTE_GROUPS(fcoe_bus);
 694
 695 static struct bus_type fcoe_bus_type = {
 696         .name = "fcoe",
 697         .match = &fcoe_bus_match,
 698         .bus_groups = fcoe_bus_groups,
 699 };
 700
 701 /**
 702  * fcoe_ctlr_device_flush_work() - Flush a FIP ctlr's workqueue
 703  * @ctlr: Pointer to the FIP ctlr whose workqueue is to be flushed
 704  */
 705 static void fcoe_ctlr_device_flush_work(struct fcoe_ctlr_device *ctlr)
 706 {
 707         if (!fcoe_ctlr_work_q(ctlr)) {
 708                 printk(KERN_ERR
 709                        "ERROR: FIP Ctlr '%d' attempted to flush work, "
 710                        "when no workqueue created.\n", ctlr->id);
 711                 dump_stack();
 712                 return;
 713         }
 714
 715         flush_workqueue(fcoe_ctlr_work_q(ctlr));
 716 }
 717
 718 /**
 719  * fcoe_ctlr_device_queue_work() - Schedule work for a FIP ctlr's workqueue
 720  * @ctlr: Pointer to the FIP ctlr who owns the devloss workqueue
 721  * @work:   Work to queue for execution
 722  *
 723  * Return value:
 724  *      1 on success / 0 already queued / < 0 for error
 725  */
 726 static int fcoe_ctlr_device_queue_work(struct fcoe_ctlr_device *ctlr,
 727                                        struct work_struct *work)
 728 {
 729         if (unlikely(!fcoe_ctlr_work_q(ctlr))) {
 730                 printk(KERN_ERR
 731                        "ERROR: FIP Ctlr '%d' attempted to queue work, "
 732                        "when no workqueue created.\n", ctlr->id);
 733                 dump_stack();
 734
 735                 return -EINVAL;
 736         }
 737
 738         return queue_work(fcoe_ctlr_work_q(ctlr), work);
 739 }
 740
 741 /**
 742  * fcoe_ctlr_device_flush_devloss() - Flush a FIP ctlr's devloss workqueue
 743  * @ctlr: Pointer to FIP ctlr whose workqueue is to be flushed
 744  */
 745 static void fcoe_ctlr_device_flush_devloss(struct fcoe_ctlr_device *ctlr)
 746 {
 747         if (!fcoe_ctlr_devloss_work_q(ctlr)) {
 748                 printk(KERN_ERR
 749                        "ERROR: FIP Ctlr '%d' attempted to flush work, "
 750                        "when no workqueue created.\n", ctlr->id);
 751                 dump_stack();
 752                 return;
 753         }
 754
 755         flush_workqueue(fcoe_ctlr_devloss_work_q(ctlr));
 756 }
 757
 758 /**
 759  * fcoe_ctlr_device_queue_devloss_work() - Schedule work for a FIP ctlr's devloss workqueue
 760  * @ctlr: Pointer to the FIP ctlr who owns the devloss workqueue
 761  * @work:   Work to queue for execution
 762  * @delay:  jiffies to delay the work queuing
 763  *
 764  * Return value:
 765  *      1 on success / 0 already queued / < 0 for error
 766  */
 767 static int fcoe_ctlr_device_queue_devloss_work(struct fcoe_ctlr_device *ctlr,
 768                                                struct delayed_work *work,
 769                                                unsigned long delay)
 770 {
 771         if (unlikely(!fcoe_ctlr_devloss_work_q(ctlr))) {
 772                 printk(KERN_ERR
 773                        "ERROR: FIP Ctlr '%d' attempted to queue work, "
 774                        "when no workqueue created.\n", ctlr->id);
 775                 dump_stack();
 776
 777                 return -EINVAL;
 778         }
 779
 780         return queue_delayed_work(fcoe_ctlr_devloss_work_q(ctlr), work, delay);
 781 }
 782
 783 static int fcoe_fcf_device_match(struct fcoe_fcf_device *new,
 784                                  struct fcoe_fcf_device *old)
 785 {
 786         if (new->switch_name == old->switch_name &&
 787             new->fabric_name == old->fabric_name &&
 788             new->fc_map == old->fc_map &&
 789             ether_addr_equal(new->mac, old->mac))
 790                 return 1;
 791         return 0;
 792 }
 793
 794 /**
 795  * fcoe_ctlr_device_add() - Add a FIP ctlr to sysfs
 796  * @parent:    The parent device to which the fcoe_ctlr instance
 797  *             should be attached
 798  * @f:         The LLD's FCoE sysfs function template pointer
 799  * @priv_size: Size to be allocated with the fcoe_ctlr_device for the LLD
 800  *
 801  * This routine allocates a FIP ctlr object with some additional memory
 802  * for the LLD. The FIP ctlr is initialized, added to sysfs and then
 803  * attributes are added to it.
 804  */
 805 struct fcoe_ctlr_device *fcoe_ctlr_device_add(struct device *parent,
 806                                     struct fcoe_sysfs_function_template *f,
 807                                     int priv_size)
 808 {
 809         struct fcoe_ctlr_device *ctlr;
 810         int error = 0;
 811
 812         ctlr = kzalloc(sizeof(struct fcoe_ctlr_device) + priv_size,
 813                        GFP_KERNEL);
 814         if (!ctlr)
 815                 goto out;
 816
 817         ctlr->id = atomic_inc_return(&ctlr_num) - 1;
 818         ctlr->f = f;
 819         ctlr->mode = FIP_CONN_TYPE_FABRIC;
 820         INIT_LIST_HEAD(&ctlr->fcfs);
 821         mutex_init(&ctlr->lock);
 822         ctlr->dev.parent = parent;
 823         ctlr->dev.bus = &fcoe_bus_type;
 824         ctlr->dev.type = &fcoe_ctlr_device_type;
 825
 826         ctlr->fcf_dev_loss_tmo = fcoe_fcf_dev_loss_tmo;
 827
 828         snprintf(ctlr->work_q_name, sizeof(ctlr->work_q_name),
 829                  "ctlr_wq_%d", ctlr->id);
 830         ctlr->work_q = create_singlethread_workqueue(
 831                 ctlr->work_q_name);
 832         if (!ctlr->work_q)
 833                 goto out_del;
 834
 835         snprintf(ctlr->devloss_work_q_name,
 836                  sizeof(ctlr->devloss_work_q_name),
 837                  "ctlr_dl_wq_%d", ctlr->id);
 838         ctlr->devloss_work_q = create_singlethread_workqueue(
 839                 ctlr->devloss_work_q_name);
 840         if (!ctlr->devloss_work_q)
 841                 goto out_del_q;
 842
 843         dev_set_name(&ctlr->dev, "ctlr_%d", ctlr->id);
 844         error = device_register(&ctlr->dev);
 845         if (error)
 846                 goto out_del_q2;
 847
 848         return ctlr;
 849
 850 out_del_q2:
 851         destroy_workqueue(ctlr->devloss_work_q);
 852         ctlr->devloss_work_q = NULL;
 853 out_del_q:
 854         destroy_workqueue(ctlr->work_q);
 855         ctlr->work_q = NULL;
 856 out_del:
 857         kfree(ctlr);
 858 out:
 859         return NULL;
 860 }
 861 EXPORT_SYMBOL_GPL(fcoe_ctlr_device_add);
 862
 863 /**
 864  * fcoe_ctlr_device_delete() - Delete a FIP ctlr and its subtree from sysfs
 865  * @ctlr: A pointer to the ctlr to be deleted
 866  *
 867  * Deletes a FIP ctlr and any fcfs attached
 868  * to it. Deleting fcfs will cause their childen
 869  * to be deleted as well.
 870  *
 871  * The ctlr is detached from sysfs and it's resources
 872  * are freed (work q), but the memory is not freed
 873  * until its last reference is released.
 874  *
 875  * This routine expects no locks to be held before
 876  * calling.
 877  *
 878  * TODO: Currently there are no callbacks to clean up LLD data
 879  * for a fcoe_fcf_device. LLDs must keep this in mind as they need
 880  * to clean up each of their LLD data for all fcoe_fcf_device before
 881  * calling fcoe_ctlr_device_delete.
 882  */
 883 void fcoe_ctlr_device_delete(struct fcoe_ctlr_device *ctlr)
 884 {
 885         struct fcoe_fcf_device *fcf, *next;
 886         /* Remove any attached fcfs */
 887         mutex_lock(&ctlr->lock);
 888         list_for_each_entry_safe(fcf, next,
 889                                  &ctlr->fcfs, peers) {
 890                 list_del(&fcf->peers);
 891                 fcf->state = FCOE_FCF_STATE_DELETED;
 892                 fcoe_ctlr_device_queue_work(ctlr, &fcf->delete_work);
 893         }
 894         mutex_unlock(&ctlr->lock);
 895
 896         fcoe_ctlr_device_flush_work(ctlr);
 897
 898         destroy_workqueue(ctlr->devloss_work_q);
 899         ctlr->devloss_work_q = NULL;
 900         destroy_workqueue(ctlr->work_q);
 901         ctlr->work_q = NULL;
 902
 903         device_unregister(&ctlr->dev);
 904 }
 905 EXPORT_SYMBOL_GPL(fcoe_ctlr_device_delete);
 906
 907 /**
 908  * fcoe_fcf_device_final_delete() - Final delete routine
 909  * @work: The FIP fcf's embedded work struct
 910  *
 911  * It is expected that the fcf has been removed from
 912  * the FIP ctlr's list before calling this routine.
 913  */
 914 static void fcoe_fcf_device_final_delete(struct work_struct *work)
 915 {
 916         struct fcoe_fcf_device *fcf =
 917                 container_of(work, struct fcoe_fcf_device, delete_work);
 918         struct fcoe_ctlr_device *ctlr = fcoe_fcf_dev_to_ctlr_dev(fcf);
 919
 920         /*
 921          * Cancel any outstanding timers. These should really exist
 922          * only when rmmod'ing the LLDD and we're asking for
 923          * immediate termination of the rports
 924          */
 925         if (!cancel_delayed_work(&fcf->dev_loss_work))
 926                 fcoe_ctlr_device_flush_devloss(ctlr);
 927
 928         device_unregister(&fcf->dev);
 929 }
 930
 931 /**
 932  * fip_timeout_deleted_fcf() - Delete a fcf when the devloss timer fires
 933  * @work: The FIP fcf's embedded work struct
 934  *
 935  * Removes the fcf from the FIP ctlr's list of fcfs and
 936  * queues the final deletion.
 937  */
 938 static void fip_timeout_deleted_fcf(struct work_struct *work)
 939 {
 940         struct fcoe_fcf_device *fcf =
 941                 container_of(work, struct fcoe_fcf_device, dev_loss_work.work);
 942         struct fcoe_ctlr_device *ctlr = fcoe_fcf_dev_to_ctlr_dev(fcf);
 943
 944         mutex_lock(&ctlr->lock);
 945
 946         /*
 947          * If the fcf is deleted or reconnected before the timer
 948          * fires the devloss queue will be flushed, but the state will
 949          * either be CONNECTED or DELETED. If that is the case we
 950          * cancel deleting the fcf.
 951          */
 952         if (fcf->state != FCOE_FCF_STATE_DISCONNECTED)
 953                 goto out;
 954
 955         dev_printk(KERN_ERR, &fcf->dev,
 956                    "FIP fcf connection time out: removing fcf\n");
 957
 958         list_del(&fcf->peers);
 959         fcf->state = FCOE_FCF_STATE_DELETED;
 960         fcoe_ctlr_device_queue_work(ctlr, &fcf->delete_work);
 961
 962 out:
 963         mutex_unlock(&ctlr->lock);
 964 }
 965
 966 /**
 967  * fcoe_fcf_device_delete() - Delete a FIP fcf
 968  * @fcf: Pointer to the fcf which is to be deleted
 969  *
 970  * Queues the FIP fcf on the devloss workqueue
 971  *
 972  * Expects the ctlr_attrs mutex to be held for fcf
 973  * state change.
 974  */
 975 void fcoe_fcf_device_delete(struct fcoe_fcf_device *fcf)
 976 {
 977         struct fcoe_ctlr_device *ctlr = fcoe_fcf_dev_to_ctlr_dev(fcf);
 978         int timeout = fcf->dev_loss_tmo;
 979
 980         if (fcf->state != FCOE_FCF_STATE_CONNECTED)
 981                 return;
 982
 983         fcf->state = FCOE_FCF_STATE_DISCONNECTED;
 984
 985         /*
 986          * FCF will only be re-connected by the LLD calling
 987          * fcoe_fcf_device_add, and it should be setting up
 988          * priv then.
 989          */
 990         fcf->priv = NULL;
 991
 992         fcoe_ctlr_device_queue_devloss_work(ctlr, &fcf->dev_loss_work,
 993                                            timeout * HZ);
 994 }
 995 EXPORT_SYMBOL_GPL(fcoe_fcf_device_delete);
 996
 997 /**
 998  * fcoe_fcf_device_add() - Add a FCoE sysfs fcoe_fcf_device to the system
 999  * @ctlr:    The fcoe_ctlr_device that will be the fcoe_fcf_device parent
1000  * @new_fcf: A temporary FCF used for lookups on the current list of fcfs
1001  *
1002  * Expects to be called with the ctlr->lock held
1003  */
1004 struct fcoe_fcf_device *fcoe_fcf_device_add(struct fcoe_ctlr_device *ctlr,
1005                                             struct fcoe_fcf_device *new_fcf)
1006 {
1007         struct fcoe_fcf_device *fcf;
1008         int error = 0;
1009
1010         list_for_each_entry(fcf, &ctlr->fcfs, peers) {
1011                 if (fcoe_fcf_device_match(new_fcf, fcf)) {
1012                         if (fcf->state == FCOE_FCF_STATE_CONNECTED)
1013                                 return fcf;
1014
1015                         fcf->state = FCOE_FCF_STATE_CONNECTED;
1016
1017                         if (!cancel_delayed_work(&fcf->dev_loss_work))
1018                                 fcoe_ctlr_device_flush_devloss(ctlr);
1019
1020                         return fcf;
1021                 }
1022         }
1023
1024         fcf = kzalloc(sizeof(struct fcoe_fcf_device), GFP_ATOMIC);
1025         if (unlikely(!fcf))
1026                 goto out;
1027
1028         INIT_WORK(&fcf->delete_work, fcoe_fcf_device_final_delete);
1029         INIT_DELAYED_WORK(&fcf->dev_loss_work, fip_timeout_deleted_fcf);
1030
1031         fcf->dev.parent = &ctlr->dev;
1032         fcf->dev.bus = &fcoe_bus_type;
1033         fcf->dev.type = &fcoe_fcf_device_type;
1034         fcf->id = atomic_inc_return(&fcf_num) - 1;
1035         fcf->state = FCOE_FCF_STATE_UNKNOWN;
1036
1037         fcf->dev_loss_tmo = ctlr->fcf_dev_loss_tmo;
1038
1039         dev_set_name(&fcf->dev, "fcf_%d", fcf->id);
1040
1041         fcf->fabric_name = new_fcf->fabric_name;
1042         fcf->switch_name = new_fcf->switch_name;
1043         fcf->fc_map = new_fcf->fc_map;
1044         fcf->vfid = new_fcf->vfid;
1045         memcpy(fcf->mac, new_fcf->mac, ETH_ALEN);
1046         fcf->priority = new_fcf->priority;
1047         fcf->fka_period = new_fcf->fka_period;
1048         fcf->selected = new_fcf->selected;
1049
1050         error = device_register(&fcf->dev);
1051         if (error)
1052                 goto out_del;
1053
1054         fcf->state = FCOE_FCF_STATE_CONNECTED;
1055         list_add_tail(&fcf->peers, &ctlr->fcfs);
1056
1057         return fcf;
1058
1059 out_del:
1060         kfree(fcf);
1061 out:
1062         return NULL;
1063 }
1064 EXPORT_SYMBOL_GPL(fcoe_fcf_device_add);
1065
1066 int __init fcoe_sysfs_setup(void)
1067 {
1068         int error;
1069
1070         atomic_set(&ctlr_num, 0);
1071         atomic_set(&fcf_num, 0);
1072
1073         error = bus_register(&fcoe_bus_type);
1074         if (error)
1075                 return error;
1076
1077         return 0;
1078 }
1079
1080 void __exit fcoe_sysfs_teardown(void)
1081 {
1082         bus_unregister(&fcoe_bus_type);
1083 }