drivers/scsi/fcoe/fcoe_sysfs.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright(c) 2011 - 2012 Intel Corporation. All rights reserved.
   4  *
   5  * Maintained at www.Open-FCoE.org
   6  */
   7
   8 #include <linux/module.h>
   9 #include <linux/types.h>
  10 #include <linux/kernel.h>
  11 #include <linux/etherdevice.h>
  12 #include <linux/ctype.h>
  13
  14 #include <scsi/fcoe_sysfs.h>
  15 #include <scsi/libfcoe.h>
  16
  17 /*
  18  * OK to include local libfcoe.h for debug_logging, but cannot include
  19  * <scsi/libfcoe.h> otherwise non-netdev based fcoe solutions would have
  20  * have to include more than fcoe_sysfs.h.
  21  */
  22 #include "libfcoe.h"
  23
  24 static atomic_t ctlr_num;
  25 static atomic_t fcf_num;
  26
  27 /*
  28  * fcoe_fcf_dev_loss_tmo: the default number of seconds that fcoe sysfs
  29  * should insulate the loss of a fcf.
  30  */
  31 static unsigned int fcoe_fcf_dev_loss_tmo = 1800;  /* seconds */
  32
  33 module_param_named(fcf_dev_loss_tmo, fcoe_fcf_dev_loss_tmo,
  34                    uint, S_IRUGO|S_IWUSR);
  35 MODULE_PARM_DESC(fcf_dev_loss_tmo,
  36                  "Maximum number of seconds that libfcoe should"
  37                  " insulate the loss of a fcf. Once this value is"
  38                  " exceeded, the fcf is removed.");
  39
  40 /*
  41  * These are used by the fcoe_*_show_function routines, they
  42  * are intentionally placed in the .c file as they're not intended
  43  * for use throughout the code.
  44  */
  45 #define fcoe_ctlr_id(x)                         \
  46         ((x)->id)
  47 #define fcoe_ctlr_work_q_name(x)                \
  48         ((x)->work_q_name)
  49 #define fcoe_ctlr_work_q(x)                     \
  50         ((x)->work_q)
  51 #define fcoe_ctlr_devloss_work_q_name(x)        \
  52         ((x)->devloss_work_q_name)
  53 #define fcoe_ctlr_devloss_work_q(x)             \
  54         ((x)->devloss_work_q)
  55 #define fcoe_ctlr_mode(x)                       \
  56         ((x)->mode)
  57 #define fcoe_ctlr_fcf_dev_loss_tmo(x)           \
  58         ((x)->fcf_dev_loss_tmo)
  59 #define fcoe_ctlr_link_fail(x)                  \
  60         ((x)->lesb.lesb_link_fail)
  61 #define fcoe_ctlr_vlink_fail(x)                 \
  62         ((x)->lesb.lesb_vlink_fail)
  63 #define fcoe_ctlr_miss_fka(x)                   \
  64         ((x)->lesb.lesb_miss_fka)
  65 #define fcoe_ctlr_symb_err(x)                   \
  66         ((x)->lesb.lesb_symb_err)
  67 #define fcoe_ctlr_err_block(x)                  \
  68         ((x)->lesb.lesb_err_block)
  69 #define fcoe_ctlr_fcs_error(x)                  \
  70         ((x)->lesb.lesb_fcs_error)
  71 #define fcoe_ctlr_enabled(x)                    \
  72         ((x)->enabled)
  73 #define fcoe_fcf_state(x)                       \
  74         ((x)->state)
  75 #define fcoe_fcf_fabric_name(x)                 \
  76         ((x)->fabric_name)
  77 #define fcoe_fcf_switch_name(x)                 \
  78         ((x)->switch_name)
  79 #define fcoe_fcf_fc_map(x)                      \
  80         ((x)->fc_map)
  81 #define fcoe_fcf_vfid(x)                        \
  82         ((x)->vfid)
  83 #define fcoe_fcf_mac(x)                         \
  84         ((x)->mac)
  85 #define fcoe_fcf_priority(x)                    \
  86         ((x)->priority)
  87 #define fcoe_fcf_fka_period(x)                  \
  88         ((x)->fka_period)
  89 #define fcoe_fcf_dev_loss_tmo(x)                \
  90         ((x)->dev_loss_tmo)
  91 #define fcoe_fcf_selected(x)                    \
  92         ((x)->selected)
  93 #define fcoe_fcf_vlan_id(x)                     \
  94         ((x)->vlan_id)
  95
  96 /*
  97  * dev_loss_tmo attribute
  98  */
  99 static int fcoe_str_to_dev_loss(const char *buf, unsigned long *val)
 100 {
 101         int ret;
 102
 103         ret = kstrtoul(buf, 0, val);
 104         if (ret)
 105                 return -EINVAL;
 106         /*
 107          * Check for overflow; dev_loss_tmo is u32
 108          */
 109         if (*val > UINT_MAX)
 110                 return -EINVAL;
 111
 112         return 0;
 113 }
 114
 115 static int fcoe_fcf_set_dev_loss_tmo(struct fcoe_fcf_device *fcf,
 116                                      unsigned long val)
 117 {
 118         if ((fcf->state == FCOE_FCF_STATE_UNKNOWN) ||
 119             (fcf->state == FCOE_FCF_STATE_DISCONNECTED) ||
 120             (fcf->state == FCOE_FCF_STATE_DELETED))
 121                 return -EBUSY;
 122         /*
 123          * Check for overflow; dev_loss_tmo is u32
 124          */
 125         if (val > UINT_MAX)
 126                 return -EINVAL;
 127
 128         fcoe_fcf_dev_loss_tmo(fcf) = val;
 129         return 0;
 130 }
 131
 132 #define FCOE_DEVICE_ATTR(_prefix, _name, _mode, _show, _store)  \
 133 struct device_attribute device_attr_fcoe_##_prefix##_##_name =  \
 134         __ATTR(_name, _mode, _show, _store)
 135
 136 #define fcoe_ctlr_show_function(field, format_string, sz, cast) \
 137 static ssize_t show_fcoe_ctlr_device_##field(struct device *dev, \
 138                                             struct device_attribute *attr, \
 139                                             char *buf)                  \
 140 {                                                                       \
 141         struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);               \
 142         if (ctlr->f->get_fcoe_ctlr_##field)                             \
 143                 ctlr->f->get_fcoe_ctlr_##field(ctlr);                   \
 144         return snprintf(buf, sz, format_string,                         \
 145                         cast fcoe_ctlr_##field(ctlr));                  \
 146 }
 147
 148 #define fcoe_fcf_show_function(field, format_string, sz, cast)  \
 149 static ssize_t show_fcoe_fcf_device_##field(struct device *dev, \
 150                                            struct device_attribute *attr, \
 151                                            char *buf)                   \
 152 {                                                                       \
 153         struct fcoe_fcf_device *fcf = dev_to_fcf(dev);                  \
 154         struct fcoe_ctlr_device *ctlr = fcoe_fcf_dev_to_ctlr_dev(fcf);  \
 155         if (ctlr->f->get_fcoe_fcf_##field)                              \
 156                 ctlr->f->get_fcoe_fcf_##field(fcf);                     \
 157         return snprintf(buf, sz, format_string,                         \
 158                         cast fcoe_fcf_##field(fcf));                    \
 159 }
 160
 161 #define fcoe_ctlr_private_show_function(field, format_string, sz, cast) \
 162 static ssize_t show_fcoe_ctlr_device_##field(struct device *dev, \
 163                                             struct device_attribute *attr, \
 164                                             char *buf)                  \
 165 {                                                                       \
 166         struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);               \
 167         return snprintf(buf, sz, format_string, cast fcoe_ctlr_##field(ctlr)); \
 168 }
 169
 170 #define fcoe_fcf_private_show_function(field, format_string, sz, cast)  \
 171 static ssize_t show_fcoe_fcf_device_##field(struct device *dev, \
 172                                            struct device_attribute *attr, \
 173                                            char *buf)                   \
 174 {                                                               \
 175         struct fcoe_fcf_device *fcf = dev_to_fcf(dev);                  \
 176         return snprintf(buf, sz, format_string, cast fcoe_fcf_##field(fcf)); \
 177 }
 178
 179 #define fcoe_ctlr_private_rd_attr(field, format_string, sz)             \
 180         fcoe_ctlr_private_show_function(field, format_string, sz, )     \
 181         static FCOE_DEVICE_ATTR(ctlr, field, S_IRUGO,                   \
 182                                 show_fcoe_ctlr_device_##field, NULL)
 183
 184 #define fcoe_ctlr_rd_attr(field, format_string, sz)                     \
 185         fcoe_ctlr_show_function(field, format_string, sz, )             \
 186         static FCOE_DEVICE_ATTR(ctlr, field, S_IRUGO,                   \
 187                                 show_fcoe_ctlr_device_##field, NULL)
 188
 189 #define fcoe_fcf_rd_attr(field, format_string, sz)                      \
 190         fcoe_fcf_show_function(field, format_string, sz, )              \
 191         static FCOE_DEVICE_ATTR(fcf, field, S_IRUGO,                    \
 192                                 show_fcoe_fcf_device_##field, NULL)
 193
 194 #define fcoe_fcf_private_rd_attr(field, format_string, sz)              \
 195         fcoe_fcf_private_show_function(field, format_string, sz, )      \
 196         static FCOE_DEVICE_ATTR(fcf, field, S_IRUGO,                    \
 197                                 show_fcoe_fcf_device_##field, NULL)
 198
 199 #define fcoe_ctlr_private_rd_attr_cast(field, format_string, sz, cast)  \
 200         fcoe_ctlr_private_show_function(field, format_string, sz, (cast)) \
 201         static FCOE_DEVICE_ATTR(ctlr, field, S_IRUGO,                   \
 202                                 show_fcoe_ctlr_device_##field, NULL)
 203
 204 #define fcoe_fcf_private_rd_attr_cast(field, format_string, sz, cast)   \
 205         fcoe_fcf_private_show_function(field, format_string, sz, (cast)) \
 206         static FCOE_DEVICE_ATTR(fcf, field, S_IRUGO,                    \
 207                                 show_fcoe_fcf_device_##field, NULL)
 208
 209 #define fcoe_enum_name_search(title, table_type, table)                 \
 210 static const char *get_fcoe_##title##_name(enum table_type table_key)   \
 211 {                                                                       \
 212         if (table_key < 0 || table_key >= ARRAY_SIZE(table))            \
 213                 return NULL;                                            \
 214         return table[table_key];                                        \
 215 }
 216
 217 static char *fip_conn_type_names[] = {
 218         [ FIP_CONN_TYPE_UNKNOWN ] = "Unknown",
 219         [ FIP_CONN_TYPE_FABRIC ]  = "Fabric",
 220         [ FIP_CONN_TYPE_VN2VN ]   = "VN2VN",
 221 };
 222 fcoe_enum_name_search(ctlr_mode, fip_conn_type, fip_conn_type_names)
 223
 224 static enum fip_conn_type fcoe_parse_mode(const char *buf)
 225 {
 226         int i;
 227
 228         for (i = 0; i < ARRAY_SIZE(fip_conn_type_names); i++) {
 229                 if (strcasecmp(buf, fip_conn_type_names[i]) == 0)
 230                         return i;
 231         }
 232
 233         return FIP_CONN_TYPE_UNKNOWN;
 234 }
 235
 236 static char *fcf_state_names[] = {
 237         [ FCOE_FCF_STATE_UNKNOWN ]      = "Unknown",
 238         [ FCOE_FCF_STATE_DISCONNECTED ] = "Disconnected",
 239         [ FCOE_FCF_STATE_CONNECTED ]    = "Connected",
 240 };
 241 fcoe_enum_name_search(fcf_state, fcf_state, fcf_state_names)
 242 #define FCOE_FCF_STATE_MAX_NAMELEN 50
 243
 244 static ssize_t show_fcf_state(struct device *dev,
 245                               struct device_attribute *attr,
 246                               char *buf)
 247 {
 248         struct fcoe_fcf_device *fcf = dev_to_fcf(dev);
 249         const char *name;
 250         name = get_fcoe_fcf_state_name(fcf->state);
 251         if (!name)
 252                 return -EINVAL;
 253         return snprintf(buf, FCOE_FCF_STATE_MAX_NAMELEN, "%s\n", name);
 254 }
 255 static FCOE_DEVICE_ATTR(fcf, state, S_IRUGO, show_fcf_state, NULL);
 256
 257 #define FCOE_MAX_MODENAME_LEN 20
 258 static ssize_t show_ctlr_mode(struct device *dev,
 259                               struct device_attribute *attr,
 260                               char *buf)
 261 {
 262         struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);
 263         const char *name;
 264
 265         name = get_fcoe_ctlr_mode_name(ctlr->mode);
 266         if (!name)
 267                 return -EINVAL;
 268         return snprintf(buf, FCOE_MAX_MODENAME_LEN,
 269                         "%s\n", name);
 270 }
 271
 272 static ssize_t store_ctlr_mode(struct device *dev,
 273                                struct device_attribute *attr,
 274                                const char *buf, size_t count)
 275 {
 276         struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);
 277         char mode[FCOE_MAX_MODENAME_LEN + 1];
 278
 279         if (count > FCOE_MAX_MODENAME_LEN)
 280                 return -EINVAL;
 281
 282         strncpy(mode, buf, count);
 283
 284         if (mode[count - 1] == '\n')
 285                 mode[count - 1] = '\0';
 286         else
 287                 mode[count] = '\0';
 288
 289         switch (ctlr->enabled) {
 290         case FCOE_CTLR_ENABLED:
 291                 LIBFCOE_SYSFS_DBG(ctlr, "Cannot change mode when enabled.\n");
 292                 return -EBUSY;
 293         case FCOE_CTLR_DISABLED:
 294                 if (!ctlr->f->set_fcoe_ctlr_mode) {
 295                         LIBFCOE_SYSFS_DBG(ctlr,
 296                                           "Mode change not supported by LLD.\n");
 297                         return -ENOTSUPP;
 298                 }
 299
 300                 ctlr->mode = fcoe_parse_mode(mode);
 301                 if (ctlr->mode == FIP_CONN_TYPE_UNKNOWN) {
 302                         LIBFCOE_SYSFS_DBG(ctlr, "Unknown mode %s provided.\n",
 303                                           buf);
 304                         return -EINVAL;
 305                 }
 306
 307                 ctlr->f->set_fcoe_ctlr_mode(ctlr);
 308                 LIBFCOE_SYSFS_DBG(ctlr, "Mode changed to %s.\n", buf);
 309
 310                 return count;
 311         case FCOE_CTLR_UNUSED:
 312         default:
 313                 LIBFCOE_SYSFS_DBG(ctlr, "Mode change not supported.\n");
 314                 return -ENOTSUPP;
 315         };
 316 }
 317
 318 static FCOE_DEVICE_ATTR(ctlr, mode, S_IRUGO | S_IWUSR,
 319                         show_ctlr_mode, store_ctlr_mode);
 320
 321 static ssize_t store_ctlr_enabled(struct device *dev,
 322                                   struct device_attribute *attr,
 323                                   const char *buf, size_t count)
 324 {
 325         struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);
 326         bool enabled;
 327         int rc;
 328
 329         if (*buf == '1')
 330                 enabled = true;
 331         else if (*buf == '0')
 332                 enabled = false;
 333         else
 334                 return -EINVAL;
 335
 336         switch (ctlr->enabled) {
 337         case FCOE_CTLR_ENABLED:
 338                 if (enabled)
 339                         return count;
 340                 ctlr->enabled = FCOE_CTLR_DISABLED;
 341                 break;
 342         case FCOE_CTLR_DISABLED:
 343                 if (!enabled)
 344                         return count;
 345                 ctlr->enabled = FCOE_CTLR_ENABLED;
 346                 break;
 347         case FCOE_CTLR_UNUSED:
 348                 return -ENOTSUPP;
 349         };
 350
 351         rc = ctlr->f->set_fcoe_ctlr_enabled(ctlr);
 352         if (rc)
 353                 return rc;
 354
 355         return count;
 356 }
 357
 358 static char *ctlr_enabled_state_names[] = {
 359         [ FCOE_CTLR_ENABLED ]  = "1",
 360         [ FCOE_CTLR_DISABLED ] = "0",
 361 };
 362 fcoe_enum_name_search(ctlr_enabled_state, ctlr_enabled_state,
 363                       ctlr_enabled_state_names)
 364 #define FCOE_CTLR_ENABLED_MAX_NAMELEN 50
 365
 366 static ssize_t show_ctlr_enabled_state(struct device *dev,
 367                                        struct device_attribute *attr,
 368                                        char *buf)
 369 {
 370         struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);
 371         const char *name;
 372
 373         name = get_fcoe_ctlr_enabled_state_name(ctlr->enabled);
 374         if (!name)
 375                 return -EINVAL;
 376         return snprintf(buf, FCOE_CTLR_ENABLED_MAX_NAMELEN,
 377                         "%s\n", name);
 378 }
 379
 380 static FCOE_DEVICE_ATTR(ctlr, enabled, S_IRUGO | S_IWUSR,
 381                         show_ctlr_enabled_state,
 382                         store_ctlr_enabled);
 383
 384 static ssize_t store_ctlr_fip_resp(struct device *dev,
 385                               struct device_attribute *attr,
 386                               const char *buf, size_t count)
 387 {
 388         struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);
 389         struct fcoe_ctlr *fip = fcoe_ctlr_device_priv(ctlr);
 390
 391         mutex_lock(&fip->ctlr_mutex);
 392         if ((buf[1] == '\0') || ((buf[1] == '\n') && (buf[2] == '\0'))) {
 393                 if (buf[0] == '1') {
 394                         fip->fip_resp = 1;
 395                         mutex_unlock(&fip->ctlr_mutex);
 396                         return count;
 397                 }
 398                 if (buf[0] == '0') {
 399                         fip->fip_resp = 0;
 400                         mutex_unlock(&fip->ctlr_mutex);
 401                         return count;
 402                 }
 403         }
 404         mutex_unlock(&fip->ctlr_mutex);
 405         return -EINVAL;
 406 }
 407
 408 static ssize_t show_ctlr_fip_resp(struct device *dev,
 409                                   struct device_attribute *attr,
 410                                   char *buf)
 411 {
 412         struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);
 413         struct fcoe_ctlr *fip = fcoe_ctlr_device_priv(ctlr);
 414
 415         return sprintf(buf, "%d\n", fip->fip_resp ? 1 : 0);
 416 }
 417
 418 static FCOE_DEVICE_ATTR(ctlr, fip_vlan_responder, S_IRUGO | S_IWUSR,
 419                         show_ctlr_fip_resp,
 420                         store_ctlr_fip_resp);
 421
 422 static ssize_t
 423 fcoe_ctlr_var_store(u32 *var, const char *buf, size_t count)
 424 {
 425         int err;
 426         unsigned long v;
 427
 428         err = kstrtoul(buf, 10, &v);
 429         if (err || v > UINT_MAX)
 430                 return -EINVAL;
 431
 432         *var = v;
 433
 434         return count;
 435 }
 436
 437 static ssize_t store_ctlr_r_a_tov(struct device *dev,
 438                                   struct device_attribute *attr,
 439                                   const char *buf, size_t count)
 440 {
 441         struct fcoe_ctlr_device *ctlr_dev = dev_to_ctlr(dev);
 442         struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev);
 443
 444         if (ctlr_dev->enabled == FCOE_CTLR_ENABLED)
 445                 return -EBUSY;
 446         if (ctlr_dev->enabled == FCOE_CTLR_DISABLED)
 447                 return fcoe_ctlr_var_store(&ctlr->lp->r_a_tov, buf, count);
 448         return -ENOTSUPP;
 449 }
 450
 451 static ssize_t show_ctlr_r_a_tov(struct device *dev,
 452                                  struct device_attribute *attr,
 453                                  char *buf)
 454 {
 455         struct fcoe_ctlr_device *ctlr_dev = dev_to_ctlr(dev);
 456         struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev);
 457
 458         return sprintf(buf, "%d\n", ctlr->lp->r_a_tov);
 459 }
 460
 461 static FCOE_DEVICE_ATTR(ctlr, r_a_tov, S_IRUGO | S_IWUSR,
 462                         show_ctlr_r_a_tov, store_ctlr_r_a_tov);
 463
 464 static ssize_t store_ctlr_e_d_tov(struct device *dev,
 465                                   struct device_attribute *attr,
 466                                   const char *buf, size_t count)
 467 {
 468         struct fcoe_ctlr_device *ctlr_dev = dev_to_ctlr(dev);
 469         struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev);
 470
 471         if (ctlr_dev->enabled == FCOE_CTLR_ENABLED)
 472                 return -EBUSY;
 473         if (ctlr_dev->enabled == FCOE_CTLR_DISABLED)
 474                 return fcoe_ctlr_var_store(&ctlr->lp->e_d_tov, buf, count);
 475         return -ENOTSUPP;
 476 }
 477
 478 static ssize_t show_ctlr_e_d_tov(struct device *dev,
 479                                  struct device_attribute *attr,
 480                                  char *buf)
 481 {
 482         struct fcoe_ctlr_device *ctlr_dev = dev_to_ctlr(dev);
 483         struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev);
 484
 485         return sprintf(buf, "%d\n", ctlr->lp->e_d_tov);
 486 }
 487
 488 static FCOE_DEVICE_ATTR(ctlr, e_d_tov, S_IRUGO | S_IWUSR,
 489                         show_ctlr_e_d_tov, store_ctlr_e_d_tov);
 490
 491 static ssize_t
 492 store_private_fcoe_ctlr_fcf_dev_loss_tmo(struct device *dev,
 493                                          struct device_attribute *attr,
 494                                          const char *buf, size_t count)
 495 {
 496         struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);
 497         struct fcoe_fcf_device *fcf;
 498         unsigned long val;
 499         int rc;
 500
 501         rc = fcoe_str_to_dev_loss(buf, &val);
 502         if (rc)
 503                 return rc;
 504
 505         fcoe_ctlr_fcf_dev_loss_tmo(ctlr) = val;
 506         mutex_lock(&ctlr->lock);
 507         list_for_each_entry(fcf, &ctlr->fcfs, peers)
 508                 fcoe_fcf_set_dev_loss_tmo(fcf, val);
 509         mutex_unlock(&ctlr->lock);
 510         return count;
 511 }
 512 fcoe_ctlr_private_show_function(fcf_dev_loss_tmo, "%d\n", 20, );
 513 static FCOE_DEVICE_ATTR(ctlr, fcf_dev_loss_tmo, S_IRUGO | S_IWUSR,
 514                         show_fcoe_ctlr_device_fcf_dev_loss_tmo,
 515                         store_private_fcoe_ctlr_fcf_dev_loss_tmo);
 516
 517 /* Link Error Status Block (LESB) */
 518 fcoe_ctlr_rd_attr(link_fail, "%u\n", 20);
 519 fcoe_ctlr_rd_attr(vlink_fail, "%u\n", 20);
 520 fcoe_ctlr_rd_attr(miss_fka, "%u\n", 20);
 521 fcoe_ctlr_rd_attr(symb_err, "%u\n", 20);
 522 fcoe_ctlr_rd_attr(err_block, "%u\n", 20);
 523 fcoe_ctlr_rd_attr(fcs_error, "%u\n", 20);
 524
 525 fcoe_fcf_private_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long);
 526 fcoe_fcf_private_rd_attr_cast(switch_name, "0x%llx\n", 20, unsigned long long);
 527 fcoe_fcf_private_rd_attr(priority, "%u\n", 20);
 528 fcoe_fcf_private_rd_attr(fc_map, "0x%x\n", 20);
 529 fcoe_fcf_private_rd_attr(vfid, "%u\n", 20);
 530 fcoe_fcf_private_rd_attr(mac, "%pM\n", 20);
 531 fcoe_fcf_private_rd_attr(fka_period, "%u\n", 20);
 532 fcoe_fcf_rd_attr(selected, "%u\n", 20);
 533 fcoe_fcf_rd_attr(vlan_id, "%u\n", 20);
 534
 535 fcoe_fcf_private_show_function(dev_loss_tmo, "%d\n", 20, )
 536 static ssize_t
 537 store_fcoe_fcf_dev_loss_tmo(struct device *dev, struct device_attribute *attr,
 538                             const char *buf, size_t count)
 539 {
 540         struct fcoe_fcf_device *fcf = dev_to_fcf(dev);
 541         unsigned long val;
 542         int rc;
 543
 544         rc = fcoe_str_to_dev_loss(buf, &val);
 545         if (rc)
 546                 return rc;
 547
 548         rc = fcoe_fcf_set_dev_loss_tmo(fcf, val);
 549         if (rc)
 550                 return rc;
 551         return count;
 552 }
 553 static FCOE_DEVICE_ATTR(fcf, dev_loss_tmo, S_IRUGO | S_IWUSR,
 554                         show_fcoe_fcf_device_dev_loss_tmo,
 555                         store_fcoe_fcf_dev_loss_tmo);
 556
 557 static struct attribute *fcoe_ctlr_lesb_attrs[] = {
 558         &device_attr_fcoe_ctlr_link_fail.attr,
 559         &device_attr_fcoe_ctlr_vlink_fail.attr,
 560         &device_attr_fcoe_ctlr_miss_fka.attr,
 561         &device_attr_fcoe_ctlr_symb_err.attr,
 562         &device_attr_fcoe_ctlr_err_block.attr,
 563         &device_attr_fcoe_ctlr_fcs_error.attr,
 564         NULL,
 565 };
 566
 567 static struct attribute_group fcoe_ctlr_lesb_attr_group = {
 568         .name = "lesb",
 569         .attrs = fcoe_ctlr_lesb_attrs,
 570 };
 571
 572 static struct attribute *fcoe_ctlr_attrs[] = {
 573         &device_attr_fcoe_ctlr_fip_vlan_responder.attr,
 574         &device_attr_fcoe_ctlr_fcf_dev_loss_tmo.attr,
 575         &device_attr_fcoe_ctlr_r_a_tov.attr,
 576         &device_attr_fcoe_ctlr_e_d_tov.attr,
 577         &device_attr_fcoe_ctlr_enabled.attr,
 578         &device_attr_fcoe_ctlr_mode.attr,
 579         NULL,
 580 };
 581
 582 static struct attribute_group fcoe_ctlr_attr_group = {
 583         .attrs = fcoe_ctlr_attrs,
 584 };
 585
 586 static const struct attribute_group *fcoe_ctlr_attr_groups[] = {
 587         &fcoe_ctlr_attr_group,
 588         &fcoe_ctlr_lesb_attr_group,
 589         NULL,
 590 };
 591
 592 static struct attribute *fcoe_fcf_attrs[] = {
 593         &device_attr_fcoe_fcf_fabric_name.attr,
 594         &device_attr_fcoe_fcf_switch_name.attr,
 595         &device_attr_fcoe_fcf_dev_loss_tmo.attr,
 596         &device_attr_fcoe_fcf_fc_map.attr,
 597         &device_attr_fcoe_fcf_vfid.attr,
 598         &device_attr_fcoe_fcf_mac.attr,
 599         &device_attr_fcoe_fcf_priority.attr,
 600         &device_attr_fcoe_fcf_fka_period.attr,
 601         &device_attr_fcoe_fcf_state.attr,
 602         &device_attr_fcoe_fcf_selected.attr,
 603         &device_attr_fcoe_fcf_vlan_id.attr,
 604         NULL
 605 };
 606
 607 static struct attribute_group fcoe_fcf_attr_group = {
 608         .attrs = fcoe_fcf_attrs,
 609 };
 610
 611 static const struct attribute_group *fcoe_fcf_attr_groups[] = {
 612         &fcoe_fcf_attr_group,
 613         NULL,
 614 };
 615
 616 static struct bus_type fcoe_bus_type;
 617
 618 static int fcoe_bus_match(struct device *dev,
 619                           struct device_driver *drv)
 620 {
 621         if (dev->bus == &fcoe_bus_type)
 622                 return 1;
 623         return 0;
 624 }
 625
 626 /**
 627  * fcoe_ctlr_device_release() - Release the FIP ctlr memory
 628  * @dev: Pointer to the FIP ctlr's embedded device
 629  *
 630  * Called when the last FIP ctlr reference is released.
 631  */
 632 static void fcoe_ctlr_device_release(struct device *dev)
 633 {
 634         struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);
 635         kfree(ctlr);
 636 }
 637
 638 /**
 639  * fcoe_fcf_device_release() - Release the FIP fcf memory
 640  * @dev: Pointer to the fcf's embedded device
 641  *
 642  * Called when the last FIP fcf reference is released.
 643  */
 644 static void fcoe_fcf_device_release(struct device *dev)
 645 {
 646         struct fcoe_fcf_device *fcf = dev_to_fcf(dev);
 647         kfree(fcf);
 648 }
 649
 650 static const struct device_type fcoe_ctlr_device_type = {
 651         .name = "fcoe_ctlr",
 652         .groups = fcoe_ctlr_attr_groups,
 653         .release = fcoe_ctlr_device_release,
 654 };
 655
 656 static const struct device_type fcoe_fcf_device_type = {
 657         .name = "fcoe_fcf",
 658         .groups = fcoe_fcf_attr_groups,
 659         .release = fcoe_fcf_device_release,
 660 };
 661
 662 static ssize_t ctlr_create_store(struct bus_type *bus, const char *buf,
 663                                  size_t count)
 664 {
 665         return fcoe_ctlr_create_store(bus, buf, count);
 666 }
 667 static BUS_ATTR_WO(ctlr_create);
 668
 669 static ssize_t ctlr_destroy_store(struct bus_type *bus, const char *buf,
 670                                   size_t count)
 671 {
 672         return fcoe_ctlr_destroy_store(bus, buf, count);
 673 }
 674 static BUS_ATTR_WO(ctlr_destroy);
 675
 676 static struct attribute *fcoe_bus_attrs[] = {
 677         &bus_attr_ctlr_create.attr,
 678         &bus_attr_ctlr_destroy.attr,
 679         NULL,
 680 };
 681 ATTRIBUTE_GROUPS(fcoe_bus);
 682
 683 static struct bus_type fcoe_bus_type = {
 684         .name = "fcoe",
 685         .match = &fcoe_bus_match,
 686         .bus_groups = fcoe_bus_groups,
 687 };
 688
 689 /**
 690  * fcoe_ctlr_device_flush_work() - Flush a FIP ctlr's workqueue
 691  * @ctlr: Pointer to the FIP ctlr whose workqueue is to be flushed
 692  */
 693 static void fcoe_ctlr_device_flush_work(struct fcoe_ctlr_device *ctlr)
 694 {
 695         if (!fcoe_ctlr_work_q(ctlr)) {
 696                 printk(KERN_ERR
 697                        "ERROR: FIP Ctlr '%d' attempted to flush work, "
 698                        "when no workqueue created.\n", ctlr->id);
 699                 dump_stack();
 700                 return;
 701         }
 702
 703         flush_workqueue(fcoe_ctlr_work_q(ctlr));
 704 }
 705
 706 /**
 707  * fcoe_ctlr_device_queue_work() - Schedule work for a FIP ctlr's workqueue
 708  * @ctlr: Pointer to the FIP ctlr who owns the devloss workqueue
 709  * @work:   Work to queue for execution
 710  *
 711  * Return value:
 712  *      1 on success / 0 already queued / < 0 for error
 713  */
 714 static int fcoe_ctlr_device_queue_work(struct fcoe_ctlr_device *ctlr,
 715                                        struct work_struct *work)
 716 {
 717         if (unlikely(!fcoe_ctlr_work_q(ctlr))) {
 718                 printk(KERN_ERR
 719                        "ERROR: FIP Ctlr '%d' attempted to queue work, "
 720                        "when no workqueue created.\n", ctlr->id);
 721                 dump_stack();
 722
 723                 return -EINVAL;
 724         }
 725
 726         return queue_work(fcoe_ctlr_work_q(ctlr), work);
 727 }
 728
 729 /**
 730  * fcoe_ctlr_device_flush_devloss() - Flush a FIP ctlr's devloss workqueue
 731  * @ctlr: Pointer to FIP ctlr whose workqueue is to be flushed
 732  */
 733 static void fcoe_ctlr_device_flush_devloss(struct fcoe_ctlr_device *ctlr)
 734 {
 735         if (!fcoe_ctlr_devloss_work_q(ctlr)) {
 736                 printk(KERN_ERR
 737                        "ERROR: FIP Ctlr '%d' attempted to flush work, "
 738                        "when no workqueue created.\n", ctlr->id);
 739                 dump_stack();
 740                 return;
 741         }
 742
 743         flush_workqueue(fcoe_ctlr_devloss_work_q(ctlr));
 744 }
 745
 746 /**
 747  * fcoe_ctlr_device_queue_devloss_work() - Schedule work for a FIP ctlr's devloss workqueue
 748  * @ctlr: Pointer to the FIP ctlr who owns the devloss workqueue
 749  * @work:   Work to queue for execution
 750  * @delay:  jiffies to delay the work queuing
 751  *
 752  * Return value:
 753  *      1 on success / 0 already queued / < 0 for error
 754  */
 755 static int fcoe_ctlr_device_queue_devloss_work(struct fcoe_ctlr_device *ctlr,
 756                                                struct delayed_work *work,
 757                                                unsigned long delay)
 758 {
 759         if (unlikely(!fcoe_ctlr_devloss_work_q(ctlr))) {
 760                 printk(KERN_ERR
 761                        "ERROR: FIP Ctlr '%d' attempted to queue work, "
 762                        "when no workqueue created.\n", ctlr->id);
 763                 dump_stack();
 764
 765                 return -EINVAL;
 766         }
 767
 768         return queue_delayed_work(fcoe_ctlr_devloss_work_q(ctlr), work, delay);
 769 }
 770
 771 static int fcoe_fcf_device_match(struct fcoe_fcf_device *new,
 772                                  struct fcoe_fcf_device *old)
 773 {
 774         if (new->switch_name == old->switch_name &&
 775             new->fabric_name == old->fabric_name &&
 776             new->fc_map == old->fc_map &&
 777             ether_addr_equal(new->mac, old->mac))
 778                 return 1;
 779         return 0;
 780 }
 781
 782 /**
 783  * fcoe_ctlr_device_add() - Add a FIP ctlr to sysfs
 784  * @parent:    The parent device to which the fcoe_ctlr instance
 785  *             should be attached
 786  * @f:         The LLD's FCoE sysfs function template pointer
 787  * @priv_size: Size to be allocated with the fcoe_ctlr_device for the LLD
 788  *
 789  * This routine allocates a FIP ctlr object with some additional memory
 790  * for the LLD. The FIP ctlr is initialized, added to sysfs and then
 791  * attributes are added to it.
 792  */
 793 struct fcoe_ctlr_device *fcoe_ctlr_device_add(struct device *parent,
 794                                     struct fcoe_sysfs_function_template *f,
 795                                     int priv_size)
 796 {
 797         struct fcoe_ctlr_device *ctlr;
 798         int error = 0;
 799
 800         ctlr = kzalloc(sizeof(struct fcoe_ctlr_device) + priv_size,
 801                        GFP_KERNEL);
 802         if (!ctlr)
 803                 goto out;
 804
 805         ctlr->id = atomic_inc_return(&ctlr_num) - 1;
 806         ctlr->f = f;
 807         ctlr->mode = FIP_CONN_TYPE_FABRIC;
 808         INIT_LIST_HEAD(&ctlr->fcfs);
 809         mutex_init(&ctlr->lock);
 810         ctlr->dev.parent = parent;
 811         ctlr->dev.bus = &fcoe_bus_type;
 812         ctlr->dev.type = &fcoe_ctlr_device_type;
 813
 814         ctlr->fcf_dev_loss_tmo = fcoe_fcf_dev_loss_tmo;
 815
 816         snprintf(ctlr->work_q_name, sizeof(ctlr->work_q_name),
 817                  "ctlr_wq_%d", ctlr->id);
 818         ctlr->work_q = create_singlethread_workqueue(
 819                 ctlr->work_q_name);
 820         if (!ctlr->work_q)
 821                 goto out_del;
 822
 823         snprintf(ctlr->devloss_work_q_name,
 824                  sizeof(ctlr->devloss_work_q_name),
 825                  "ctlr_dl_wq_%d", ctlr->id);
 826         ctlr->devloss_work_q = create_singlethread_workqueue(
 827                 ctlr->devloss_work_q_name);
 828         if (!ctlr->devloss_work_q)
 829                 goto out_del_q;
 830
 831         dev_set_name(&ctlr->dev, "ctlr_%d", ctlr->id);
 832         error = device_register(&ctlr->dev);
 833         if (error)
 834                 goto out_del_q2;
 835
 836         return ctlr;
 837
 838 out_del_q2:
 839         destroy_workqueue(ctlr->devloss_work_q);
 840         ctlr->devloss_work_q = NULL;
 841 out_del_q:
 842         destroy_workqueue(ctlr->work_q);
 843         ctlr->work_q = NULL;
 844 out_del:
 845         kfree(ctlr);
 846 out:
 847         return NULL;
 848 }
 849 EXPORT_SYMBOL_GPL(fcoe_ctlr_device_add);
 850
 851 /**
 852  * fcoe_ctlr_device_delete() - Delete a FIP ctlr and its subtree from sysfs
 853  * @ctlr: A pointer to the ctlr to be deleted
 854  *
 855  * Deletes a FIP ctlr and any fcfs attached
 856  * to it. Deleting fcfs will cause their childen
 857  * to be deleted as well.
 858  *
 859  * The ctlr is detached from sysfs and it's resources
 860  * are freed (work q), but the memory is not freed
 861  * until its last reference is released.
 862  *
 863  * This routine expects no locks to be held before
 864  * calling.
 865  *
 866  * TODO: Currently there are no callbacks to clean up LLD data
 867  * for a fcoe_fcf_device. LLDs must keep this in mind as they need
 868  * to clean up each of their LLD data for all fcoe_fcf_device before
 869  * calling fcoe_ctlr_device_delete.
 870  */
 871 void fcoe_ctlr_device_delete(struct fcoe_ctlr_device *ctlr)
 872 {
 873         struct fcoe_fcf_device *fcf, *next;
 874         /* Remove any attached fcfs */
 875         mutex_lock(&ctlr->lock);
 876         list_for_each_entry_safe(fcf, next,
 877                                  &ctlr->fcfs, peers) {
 878                 list_del(&fcf->peers);
 879                 fcf->state = FCOE_FCF_STATE_DELETED;
 880                 fcoe_ctlr_device_queue_work(ctlr, &fcf->delete_work);
 881         }
 882         mutex_unlock(&ctlr->lock);
 883
 884         fcoe_ctlr_device_flush_work(ctlr);
 885
 886         destroy_workqueue(ctlr->devloss_work_q);
 887         ctlr->devloss_work_q = NULL;
 888         destroy_workqueue(ctlr->work_q);
 889         ctlr->work_q = NULL;
 890
 891         device_unregister(&ctlr->dev);
 892 }
 893 EXPORT_SYMBOL_GPL(fcoe_ctlr_device_delete);
 894
 895 /**
 896  * fcoe_fcf_device_final_delete() - Final delete routine
 897  * @work: The FIP fcf's embedded work struct
 898  *
 899  * It is expected that the fcf has been removed from
 900  * the FIP ctlr's list before calling this routine.
 901  */
 902 static void fcoe_fcf_device_final_delete(struct work_struct *work)
 903 {
 904         struct fcoe_fcf_device *fcf =
 905                 container_of(work, struct fcoe_fcf_device, delete_work);
 906         struct fcoe_ctlr_device *ctlr = fcoe_fcf_dev_to_ctlr_dev(fcf);
 907
 908         /*
 909          * Cancel any outstanding timers. These should really exist
 910          * only when rmmod'ing the LLDD and we're asking for
 911          * immediate termination of the rports
 912          */
 913         if (!cancel_delayed_work(&fcf->dev_loss_work))
 914                 fcoe_ctlr_device_flush_devloss(ctlr);
 915
 916         device_unregister(&fcf->dev);
 917 }
 918
 919 /**
 920  * fip_timeout_deleted_fcf() - Delete a fcf when the devloss timer fires
 921  * @work: The FIP fcf's embedded work struct
 922  *
 923  * Removes the fcf from the FIP ctlr's list of fcfs and
 924  * queues the final deletion.
 925  */
 926 static void fip_timeout_deleted_fcf(struct work_struct *work)
 927 {
 928         struct fcoe_fcf_device *fcf =
 929                 container_of(work, struct fcoe_fcf_device, dev_loss_work.work);
 930         struct fcoe_ctlr_device *ctlr = fcoe_fcf_dev_to_ctlr_dev(fcf);
 931
 932         mutex_lock(&ctlr->lock);
 933
 934         /*
 935          * If the fcf is deleted or reconnected before the timer
 936          * fires the devloss queue will be flushed, but the state will
 937          * either be CONNECTED or DELETED. If that is the case we
 938          * cancel deleting the fcf.
 939          */
 940         if (fcf->state != FCOE_FCF_STATE_DISCONNECTED)
 941                 goto out;
 942
 943         dev_printk(KERN_ERR, &fcf->dev,
 944                    "FIP fcf connection time out: removing fcf\n");
 945
 946         list_del(&fcf->peers);
 947         fcf->state = FCOE_FCF_STATE_DELETED;
 948         fcoe_ctlr_device_queue_work(ctlr, &fcf->delete_work);
 949
 950 out:
 951         mutex_unlock(&ctlr->lock);
 952 }
 953
 954 /**
 955  * fcoe_fcf_device_delete() - Delete a FIP fcf
 956  * @fcf: Pointer to the fcf which is to be deleted
 957  *
 958  * Queues the FIP fcf on the devloss workqueue
 959  *
 960  * Expects the ctlr_attrs mutex to be held for fcf
 961  * state change.
 962  */
 963 void fcoe_fcf_device_delete(struct fcoe_fcf_device *fcf)
 964 {
 965         struct fcoe_ctlr_device *ctlr = fcoe_fcf_dev_to_ctlr_dev(fcf);
 966         int timeout = fcf->dev_loss_tmo;
 967
 968         if (fcf->state != FCOE_FCF_STATE_CONNECTED)
 969                 return;
 970
 971         fcf->state = FCOE_FCF_STATE_DISCONNECTED;
 972
 973         /*
 974          * FCF will only be re-connected by the LLD calling
 975          * fcoe_fcf_device_add, and it should be setting up
 976          * priv then.
 977          */
 978         fcf->priv = NULL;
 979
 980         fcoe_ctlr_device_queue_devloss_work(ctlr, &fcf->dev_loss_work,
 981                                            timeout * HZ);
 982 }
 983 EXPORT_SYMBOL_GPL(fcoe_fcf_device_delete);
 984
 985 /**
 986  * fcoe_fcf_device_add() - Add a FCoE sysfs fcoe_fcf_device to the system
 987  * @ctlr:    The fcoe_ctlr_device that will be the fcoe_fcf_device parent
 988  * @new_fcf: A temporary FCF used for lookups on the current list of fcfs
 989  *
 990  * Expects to be called with the ctlr->lock held
 991  */
 992 struct fcoe_fcf_device *fcoe_fcf_device_add(struct fcoe_ctlr_device *ctlr,
 993                                             struct fcoe_fcf_device *new_fcf)
 994 {
 995         struct fcoe_fcf_device *fcf;
 996         int error = 0;
 997
 998         list_for_each_entry(fcf, &ctlr->fcfs, peers) {
 999                 if (fcoe_fcf_device_match(new_fcf, fcf)) {
1000                         if (fcf->state == FCOE_FCF_STATE_CONNECTED)
1001                                 return fcf;
1002
1003                         fcf->state = FCOE_FCF_STATE_CONNECTED;
1004
1005                         if (!cancel_delayed_work(&fcf->dev_loss_work))
1006                                 fcoe_ctlr_device_flush_devloss(ctlr);
1007
1008                         return fcf;
1009                 }
1010         }
1011
1012         fcf = kzalloc(sizeof(struct fcoe_fcf_device), GFP_ATOMIC);
1013         if (unlikely(!fcf))
1014                 goto out;
1015
1016         INIT_WORK(&fcf->delete_work, fcoe_fcf_device_final_delete);
1017         INIT_DELAYED_WORK(&fcf->dev_loss_work, fip_timeout_deleted_fcf);
1018
1019         fcf->dev.parent = &ctlr->dev;
1020         fcf->dev.bus = &fcoe_bus_type;
1021         fcf->dev.type = &fcoe_fcf_device_type;
1022         fcf->id = atomic_inc_return(&fcf_num) - 1;
1023         fcf->state = FCOE_FCF_STATE_UNKNOWN;
1024
1025         fcf->dev_loss_tmo = ctlr->fcf_dev_loss_tmo;
1026
1027         dev_set_name(&fcf->dev, "fcf_%d", fcf->id);
1028
1029         fcf->fabric_name = new_fcf->fabric_name;
1030         fcf->switch_name = new_fcf->switch_name;
1031         fcf->fc_map = new_fcf->fc_map;
1032         fcf->vfid = new_fcf->vfid;
1033         memcpy(fcf->mac, new_fcf->mac, ETH_ALEN);
1034         fcf->priority = new_fcf->priority;
1035         fcf->fka_period = new_fcf->fka_period;
1036         fcf->selected = new_fcf->selected;
1037
1038         error = device_register(&fcf->dev);
1039         if (error)
1040                 goto out_del;
1041
1042         fcf->state = FCOE_FCF_STATE_CONNECTED;
1043         list_add_tail(&fcf->peers, &ctlr->fcfs);
1044
1045         return fcf;
1046
1047 out_del:
1048         kfree(fcf);
1049 out:
1050         return NULL;
1051 }
1052 EXPORT_SYMBOL_GPL(fcoe_fcf_device_add);
1053
1054 int __init fcoe_sysfs_setup(void)
1055 {
1056         int error;
1057
1058         atomic_set(&ctlr_num, 0);
1059         atomic_set(&fcf_num, 0);
1060
1061         error = bus_register(&fcoe_bus_type);
1062         if (error)
1063                 return error;
1064
1065         return 0;
1066 }
1067
1068 void __exit fcoe_sysfs_teardown(void)
1069 {
1070         bus_unregister(&fcoe_bus_type);
1071 }