Robert Love | 9a74e88 | 2012-05-22 19:06:21 -0700 | [diff] [blame] | 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 | |
| 25 | #include <scsi/fcoe_sysfs.h> |
| 26 | |
| 27 | static atomic_t ctlr_num; |
| 28 | static atomic_t fcf_num; |
| 29 | |
| 30 | /* |
| 31 | * fcoe_fcf_dev_loss_tmo: the default number of seconds that fcoe sysfs |
| 32 | * should insulate the loss of a fcf. |
| 33 | */ |
| 34 | static unsigned int fcoe_fcf_dev_loss_tmo = 1800; /* seconds */ |
| 35 | |
| 36 | module_param_named(fcf_dev_loss_tmo, fcoe_fcf_dev_loss_tmo, |
| 37 | uint, S_IRUGO|S_IWUSR); |
| 38 | MODULE_PARM_DESC(fcf_dev_loss_tmo, |
| 39 | "Maximum number of seconds that libfcoe should" |
| 40 | " insulate the loss of a fcf. Once this value is" |
| 41 | " exceeded, the fcf is removed."); |
| 42 | |
| 43 | /* |
| 44 | * These are used by the fcoe_*_show_function routines, they |
| 45 | * are intentionally placed in the .c file as they're not intended |
| 46 | * for use throughout the code. |
| 47 | */ |
| 48 | #define fcoe_ctlr_id(x) \ |
| 49 | ((x)->id) |
| 50 | #define fcoe_ctlr_work_q_name(x) \ |
| 51 | ((x)->work_q_name) |
| 52 | #define fcoe_ctlr_work_q(x) \ |
| 53 | ((x)->work_q) |
| 54 | #define fcoe_ctlr_devloss_work_q_name(x) \ |
| 55 | ((x)->devloss_work_q_name) |
| 56 | #define fcoe_ctlr_devloss_work_q(x) \ |
| 57 | ((x)->devloss_work_q) |
| 58 | #define fcoe_ctlr_mode(x) \ |
| 59 | ((x)->mode) |
| 60 | #define fcoe_ctlr_fcf_dev_loss_tmo(x) \ |
| 61 | ((x)->fcf_dev_loss_tmo) |
| 62 | #define fcoe_ctlr_link_fail(x) \ |
| 63 | ((x)->lesb.lesb_link_fail) |
| 64 | #define fcoe_ctlr_vlink_fail(x) \ |
| 65 | ((x)->lesb.lesb_vlink_fail) |
| 66 | #define fcoe_ctlr_miss_fka(x) \ |
| 67 | ((x)->lesb.lesb_miss_fka) |
| 68 | #define fcoe_ctlr_symb_err(x) \ |
| 69 | ((x)->lesb.lesb_symb_err) |
| 70 | #define fcoe_ctlr_err_block(x) \ |
| 71 | ((x)->lesb.lesb_err_block) |
| 72 | #define fcoe_ctlr_fcs_error(x) \ |
| 73 | ((x)->lesb.lesb_fcs_error) |
| 74 | #define fcoe_fcf_state(x) \ |
| 75 | ((x)->state) |
| 76 | #define fcoe_fcf_fabric_name(x) \ |
| 77 | ((x)->fabric_name) |
| 78 | #define fcoe_fcf_switch_name(x) \ |
| 79 | ((x)->switch_name) |
| 80 | #define fcoe_fcf_fc_map(x) \ |
| 81 | ((x)->fc_map) |
| 82 | #define fcoe_fcf_vfid(x) \ |
| 83 | ((x)->vfid) |
| 84 | #define fcoe_fcf_mac(x) \ |
| 85 | ((x)->mac) |
| 86 | #define fcoe_fcf_priority(x) \ |
| 87 | ((x)->priority) |
| 88 | #define fcoe_fcf_fka_period(x) \ |
| 89 | ((x)->fka_period) |
| 90 | #define fcoe_fcf_dev_loss_tmo(x) \ |
| 91 | ((x)->dev_loss_tmo) |
| 92 | #define fcoe_fcf_selected(x) \ |
| 93 | ((x)->selected) |
| 94 | #define fcoe_fcf_vlan_id(x) \ |
| 95 | ((x)->vlan_id) |
| 96 | |
| 97 | /* |
| 98 | * dev_loss_tmo attribute |
| 99 | */ |
| 100 | static int fcoe_str_to_dev_loss(const char *buf, unsigned long *val) |
| 101 | { |
| 102 | int ret; |
| 103 | |
| 104 | ret = kstrtoul(buf, 0, val); |
Robert Love | 902a45a | 2012-07-06 10:40:20 -0700 | [diff] [blame] | 105 | if (ret) |
Robert Love | 9a74e88 | 2012-05-22 19:06:21 -0700 | [diff] [blame] | 106 | return -EINVAL; |
| 107 | /* |
| 108 | * Check for overflow; dev_loss_tmo is u32 |
| 109 | */ |
| 110 | if (*val > UINT_MAX) |
| 111 | return -EINVAL; |
| 112 | |
| 113 | return 0; |
| 114 | } |
| 115 | |
| 116 | static int fcoe_fcf_set_dev_loss_tmo(struct fcoe_fcf_device *fcf, |
| 117 | unsigned long val) |
| 118 | { |
| 119 | if ((fcf->state == FCOE_FCF_STATE_UNKNOWN) || |
| 120 | (fcf->state == FCOE_FCF_STATE_DISCONNECTED) || |
| 121 | (fcf->state == FCOE_FCF_STATE_DELETED)) |
| 122 | return -EBUSY; |
| 123 | /* |
| 124 | * Check for overflow; dev_loss_tmo is u32 |
| 125 | */ |
| 126 | if (val > UINT_MAX) |
| 127 | return -EINVAL; |
| 128 | |
| 129 | fcoe_fcf_dev_loss_tmo(fcf) = val; |
| 130 | return 0; |
| 131 | } |
| 132 | |
| 133 | #define FCOE_DEVICE_ATTR(_prefix, _name, _mode, _show, _store) \ |
| 134 | struct device_attribute device_attr_fcoe_##_prefix##_##_name = \ |
| 135 | __ATTR(_name, _mode, _show, _store) |
| 136 | |
| 137 | #define fcoe_ctlr_show_function(field, format_string, sz, cast) \ |
| 138 | static ssize_t show_fcoe_ctlr_device_##field(struct device *dev, \ |
| 139 | struct device_attribute *attr, \ |
| 140 | char *buf) \ |
| 141 | { \ |
| 142 | struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev); \ |
| 143 | if (ctlr->f->get_fcoe_ctlr_##field) \ |
| 144 | ctlr->f->get_fcoe_ctlr_##field(ctlr); \ |
| 145 | return snprintf(buf, sz, format_string, \ |
| 146 | cast fcoe_ctlr_##field(ctlr)); \ |
| 147 | } |
| 148 | |
| 149 | #define fcoe_fcf_show_function(field, format_string, sz, cast) \ |
| 150 | static ssize_t show_fcoe_fcf_device_##field(struct device *dev, \ |
| 151 | struct device_attribute *attr, \ |
| 152 | char *buf) \ |
| 153 | { \ |
| 154 | struct fcoe_fcf_device *fcf = dev_to_fcf(dev); \ |
| 155 | struct fcoe_ctlr_device *ctlr = fcoe_fcf_dev_to_ctlr_dev(fcf); \ |
| 156 | if (ctlr->f->get_fcoe_fcf_##field) \ |
| 157 | ctlr->f->get_fcoe_fcf_##field(fcf); \ |
| 158 | return snprintf(buf, sz, format_string, \ |
| 159 | cast fcoe_fcf_##field(fcf)); \ |
| 160 | } |
| 161 | |
| 162 | #define fcoe_ctlr_private_show_function(field, format_string, sz, cast) \ |
| 163 | static ssize_t show_fcoe_ctlr_device_##field(struct device *dev, \ |
| 164 | struct device_attribute *attr, \ |
| 165 | char *buf) \ |
| 166 | { \ |
| 167 | struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev); \ |
| 168 | return snprintf(buf, sz, format_string, cast fcoe_ctlr_##field(ctlr)); \ |
| 169 | } |
| 170 | |
| 171 | #define fcoe_fcf_private_show_function(field, format_string, sz, cast) \ |
| 172 | static ssize_t show_fcoe_fcf_device_##field(struct device *dev, \ |
| 173 | struct device_attribute *attr, \ |
| 174 | char *buf) \ |
| 175 | { \ |
| 176 | struct fcoe_fcf_device *fcf = dev_to_fcf(dev); \ |
| 177 | return snprintf(buf, sz, format_string, cast fcoe_fcf_##field(fcf)); \ |
| 178 | } |
| 179 | |
| 180 | #define fcoe_ctlr_private_rd_attr(field, format_string, sz) \ |
| 181 | fcoe_ctlr_private_show_function(field, format_string, sz, ) \ |
| 182 | static FCOE_DEVICE_ATTR(ctlr, field, S_IRUGO, \ |
| 183 | show_fcoe_ctlr_device_##field, NULL) |
| 184 | |
| 185 | #define fcoe_ctlr_rd_attr(field, format_string, sz) \ |
| 186 | fcoe_ctlr_show_function(field, format_string, sz, ) \ |
| 187 | static FCOE_DEVICE_ATTR(ctlr, field, S_IRUGO, \ |
| 188 | show_fcoe_ctlr_device_##field, NULL) |
| 189 | |
| 190 | #define fcoe_fcf_rd_attr(field, format_string, sz) \ |
| 191 | fcoe_fcf_show_function(field, format_string, sz, ) \ |
| 192 | static FCOE_DEVICE_ATTR(fcf, field, S_IRUGO, \ |
| 193 | show_fcoe_fcf_device_##field, NULL) |
| 194 | |
| 195 | #define fcoe_fcf_private_rd_attr(field, format_string, sz) \ |
| 196 | fcoe_fcf_private_show_function(field, format_string, sz, ) \ |
| 197 | static FCOE_DEVICE_ATTR(fcf, field, S_IRUGO, \ |
| 198 | show_fcoe_fcf_device_##field, NULL) |
| 199 | |
| 200 | #define fcoe_ctlr_private_rd_attr_cast(field, format_string, sz, cast) \ |
| 201 | fcoe_ctlr_private_show_function(field, format_string, sz, (cast)) \ |
| 202 | static FCOE_DEVICE_ATTR(ctlr, field, S_IRUGO, \ |
| 203 | show_fcoe_ctlr_device_##field, NULL) |
| 204 | |
| 205 | #define fcoe_fcf_private_rd_attr_cast(field, format_string, sz, cast) \ |
| 206 | fcoe_fcf_private_show_function(field, format_string, sz, (cast)) \ |
| 207 | static FCOE_DEVICE_ATTR(fcf, field, S_IRUGO, \ |
| 208 | show_fcoe_fcf_device_##field, NULL) |
| 209 | |
| 210 | #define fcoe_enum_name_search(title, table_type, table) \ |
| 211 | static const char *get_fcoe_##title##_name(enum table_type table_key) \ |
| 212 | { \ |
| 213 | int i; \ |
| 214 | char *name = NULL; \ |
| 215 | \ |
| 216 | for (i = 0; i < ARRAY_SIZE(table); i++) { \ |
| 217 | if (table[i].value == table_key) { \ |
| 218 | name = table[i].name; \ |
| 219 | break; \ |
| 220 | } \ |
| 221 | } \ |
| 222 | return name; \ |
| 223 | } |
| 224 | |
| 225 | static struct { |
| 226 | enum fcf_state value; |
| 227 | char *name; |
| 228 | } fcf_state_names[] = { |
| 229 | { FCOE_FCF_STATE_UNKNOWN, "Unknown" }, |
| 230 | { FCOE_FCF_STATE_DISCONNECTED, "Disconnected" }, |
| 231 | { FCOE_FCF_STATE_CONNECTED, "Connected" }, |
| 232 | }; |
| 233 | fcoe_enum_name_search(fcf_state, fcf_state, fcf_state_names) |
| 234 | #define FCOE_FCF_STATE_MAX_NAMELEN 50 |
| 235 | |
| 236 | static ssize_t show_fcf_state(struct device *dev, |
| 237 | struct device_attribute *attr, |
| 238 | char *buf) |
| 239 | { |
| 240 | struct fcoe_fcf_device *fcf = dev_to_fcf(dev); |
| 241 | const char *name; |
| 242 | name = get_fcoe_fcf_state_name(fcf->state); |
| 243 | if (!name) |
| 244 | return -EINVAL; |
| 245 | return snprintf(buf, FCOE_FCF_STATE_MAX_NAMELEN, "%s\n", name); |
| 246 | } |
| 247 | static FCOE_DEVICE_ATTR(fcf, state, S_IRUGO, show_fcf_state, NULL); |
| 248 | |
| 249 | static struct { |
| 250 | enum fip_conn_type value; |
| 251 | char *name; |
| 252 | } fip_conn_type_names[] = { |
| 253 | { FIP_CONN_TYPE_UNKNOWN, "Unknown" }, |
| 254 | { FIP_CONN_TYPE_FABRIC, "Fabric" }, |
| 255 | { FIP_CONN_TYPE_VN2VN, "VN2VN" }, |
| 256 | }; |
| 257 | fcoe_enum_name_search(ctlr_mode, fip_conn_type, fip_conn_type_names) |
| 258 | #define FCOE_CTLR_MODE_MAX_NAMELEN 50 |
| 259 | |
| 260 | static ssize_t show_ctlr_mode(struct device *dev, |
| 261 | struct device_attribute *attr, |
| 262 | char *buf) |
| 263 | { |
| 264 | struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev); |
| 265 | const char *name; |
| 266 | |
| 267 | if (ctlr->f->get_fcoe_ctlr_mode) |
| 268 | ctlr->f->get_fcoe_ctlr_mode(ctlr); |
| 269 | |
| 270 | name = get_fcoe_ctlr_mode_name(ctlr->mode); |
| 271 | if (!name) |
| 272 | return -EINVAL; |
| 273 | return snprintf(buf, FCOE_CTLR_MODE_MAX_NAMELEN, |
| 274 | "%s\n", name); |
| 275 | } |
| 276 | static FCOE_DEVICE_ATTR(ctlr, mode, S_IRUGO, |
| 277 | show_ctlr_mode, NULL); |
| 278 | |
| 279 | static ssize_t |
| 280 | store_private_fcoe_ctlr_fcf_dev_loss_tmo(struct device *dev, |
| 281 | struct device_attribute *attr, |
| 282 | const char *buf, size_t count) |
| 283 | { |
| 284 | struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev); |
| 285 | struct fcoe_fcf_device *fcf; |
| 286 | unsigned long val; |
| 287 | int rc; |
| 288 | |
| 289 | rc = fcoe_str_to_dev_loss(buf, &val); |
| 290 | if (rc) |
| 291 | return rc; |
| 292 | |
| 293 | fcoe_ctlr_fcf_dev_loss_tmo(ctlr) = val; |
| 294 | mutex_lock(&ctlr->lock); |
| 295 | list_for_each_entry(fcf, &ctlr->fcfs, peers) |
| 296 | fcoe_fcf_set_dev_loss_tmo(fcf, val); |
| 297 | mutex_unlock(&ctlr->lock); |
| 298 | return count; |
| 299 | } |
| 300 | fcoe_ctlr_private_show_function(fcf_dev_loss_tmo, "%d\n", 20, ); |
| 301 | static FCOE_DEVICE_ATTR(ctlr, fcf_dev_loss_tmo, S_IRUGO | S_IWUSR, |
| 302 | show_fcoe_ctlr_device_fcf_dev_loss_tmo, |
| 303 | store_private_fcoe_ctlr_fcf_dev_loss_tmo); |
| 304 | |
| 305 | /* Link Error Status Block (LESB) */ |
| 306 | fcoe_ctlr_rd_attr(link_fail, "%u\n", 20); |
| 307 | fcoe_ctlr_rd_attr(vlink_fail, "%u\n", 20); |
| 308 | fcoe_ctlr_rd_attr(miss_fka, "%u\n", 20); |
| 309 | fcoe_ctlr_rd_attr(symb_err, "%u\n", 20); |
| 310 | fcoe_ctlr_rd_attr(err_block, "%u\n", 20); |
| 311 | fcoe_ctlr_rd_attr(fcs_error, "%u\n", 20); |
| 312 | |
| 313 | fcoe_fcf_private_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long); |
| 314 | fcoe_fcf_private_rd_attr_cast(switch_name, "0x%llx\n", 20, unsigned long long); |
| 315 | fcoe_fcf_private_rd_attr(priority, "%u\n", 20); |
| 316 | fcoe_fcf_private_rd_attr(fc_map, "0x%x\n", 20); |
| 317 | fcoe_fcf_private_rd_attr(vfid, "%u\n", 20); |
| 318 | fcoe_fcf_private_rd_attr(mac, "%pM\n", 20); |
| 319 | fcoe_fcf_private_rd_attr(fka_period, "%u\n", 20); |
| 320 | fcoe_fcf_rd_attr(selected, "%u\n", 20); |
| 321 | fcoe_fcf_rd_attr(vlan_id, "%u\n", 20); |
| 322 | |
| 323 | fcoe_fcf_private_show_function(dev_loss_tmo, "%d\n", 20, ) |
| 324 | static ssize_t |
| 325 | store_fcoe_fcf_dev_loss_tmo(struct device *dev, struct device_attribute *attr, |
| 326 | const char *buf, size_t count) |
| 327 | { |
| 328 | struct fcoe_fcf_device *fcf = dev_to_fcf(dev); |
| 329 | unsigned long val; |
| 330 | int rc; |
| 331 | |
| 332 | rc = fcoe_str_to_dev_loss(buf, &val); |
| 333 | if (rc) |
| 334 | return rc; |
| 335 | |
| 336 | rc = fcoe_fcf_set_dev_loss_tmo(fcf, val); |
| 337 | if (rc) |
| 338 | return rc; |
| 339 | return count; |
| 340 | } |
| 341 | static FCOE_DEVICE_ATTR(fcf, dev_loss_tmo, S_IRUGO | S_IWUSR, |
| 342 | show_fcoe_fcf_device_dev_loss_tmo, |
| 343 | store_fcoe_fcf_dev_loss_tmo); |
| 344 | |
| 345 | static struct attribute *fcoe_ctlr_lesb_attrs[] = { |
| 346 | &device_attr_fcoe_ctlr_link_fail.attr, |
| 347 | &device_attr_fcoe_ctlr_vlink_fail.attr, |
| 348 | &device_attr_fcoe_ctlr_miss_fka.attr, |
| 349 | &device_attr_fcoe_ctlr_symb_err.attr, |
| 350 | &device_attr_fcoe_ctlr_err_block.attr, |
| 351 | &device_attr_fcoe_ctlr_fcs_error.attr, |
| 352 | NULL, |
| 353 | }; |
| 354 | |
| 355 | static struct attribute_group fcoe_ctlr_lesb_attr_group = { |
| 356 | .name = "lesb", |
| 357 | .attrs = fcoe_ctlr_lesb_attrs, |
| 358 | }; |
| 359 | |
| 360 | static struct attribute *fcoe_ctlr_attrs[] = { |
| 361 | &device_attr_fcoe_ctlr_fcf_dev_loss_tmo.attr, |
| 362 | &device_attr_fcoe_ctlr_mode.attr, |
| 363 | NULL, |
| 364 | }; |
| 365 | |
| 366 | static struct attribute_group fcoe_ctlr_attr_group = { |
| 367 | .attrs = fcoe_ctlr_attrs, |
| 368 | }; |
| 369 | |
| 370 | static const struct attribute_group *fcoe_ctlr_attr_groups[] = { |
| 371 | &fcoe_ctlr_attr_group, |
| 372 | &fcoe_ctlr_lesb_attr_group, |
| 373 | NULL, |
| 374 | }; |
| 375 | |
| 376 | static struct attribute *fcoe_fcf_attrs[] = { |
| 377 | &device_attr_fcoe_fcf_fabric_name.attr, |
| 378 | &device_attr_fcoe_fcf_switch_name.attr, |
| 379 | &device_attr_fcoe_fcf_dev_loss_tmo.attr, |
| 380 | &device_attr_fcoe_fcf_fc_map.attr, |
| 381 | &device_attr_fcoe_fcf_vfid.attr, |
| 382 | &device_attr_fcoe_fcf_mac.attr, |
| 383 | &device_attr_fcoe_fcf_priority.attr, |
| 384 | &device_attr_fcoe_fcf_fka_period.attr, |
| 385 | &device_attr_fcoe_fcf_state.attr, |
| 386 | &device_attr_fcoe_fcf_selected.attr, |
| 387 | &device_attr_fcoe_fcf_vlan_id.attr, |
| 388 | NULL |
| 389 | }; |
| 390 | |
| 391 | static struct attribute_group fcoe_fcf_attr_group = { |
| 392 | .attrs = fcoe_fcf_attrs, |
| 393 | }; |
| 394 | |
| 395 | static const struct attribute_group *fcoe_fcf_attr_groups[] = { |
| 396 | &fcoe_fcf_attr_group, |
| 397 | NULL, |
| 398 | }; |
| 399 | |
| 400 | struct bus_type fcoe_bus_type; |
| 401 | |
| 402 | static int fcoe_bus_match(struct device *dev, |
| 403 | struct device_driver *drv) |
| 404 | { |
| 405 | if (dev->bus == &fcoe_bus_type) |
| 406 | return 1; |
| 407 | return 0; |
| 408 | } |
| 409 | |
| 410 | /** |
| 411 | * fcoe_ctlr_device_release() - Release the FIP ctlr memory |
| 412 | * @dev: Pointer to the FIP ctlr's embedded device |
| 413 | * |
| 414 | * Called when the last FIP ctlr reference is released. |
| 415 | */ |
| 416 | static void fcoe_ctlr_device_release(struct device *dev) |
| 417 | { |
| 418 | struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev); |
| 419 | kfree(ctlr); |
| 420 | } |
| 421 | |
| 422 | /** |
| 423 | * fcoe_fcf_device_release() - Release the FIP fcf memory |
| 424 | * @dev: Pointer to the fcf's embedded device |
| 425 | * |
| 426 | * Called when the last FIP fcf reference is released. |
| 427 | */ |
| 428 | static void fcoe_fcf_device_release(struct device *dev) |
| 429 | { |
| 430 | struct fcoe_fcf_device *fcf = dev_to_fcf(dev); |
| 431 | kfree(fcf); |
| 432 | } |
| 433 | |
| 434 | struct device_type fcoe_ctlr_device_type = { |
| 435 | .name = "fcoe_ctlr", |
| 436 | .groups = fcoe_ctlr_attr_groups, |
| 437 | .release = fcoe_ctlr_device_release, |
| 438 | }; |
| 439 | |
| 440 | struct device_type fcoe_fcf_device_type = { |
| 441 | .name = "fcoe_fcf", |
| 442 | .groups = fcoe_fcf_attr_groups, |
| 443 | .release = fcoe_fcf_device_release, |
| 444 | }; |
| 445 | |
| 446 | struct bus_type fcoe_bus_type = { |
| 447 | .name = "fcoe", |
| 448 | .match = &fcoe_bus_match, |
| 449 | }; |
| 450 | |
| 451 | /** |
| 452 | * fcoe_ctlr_device_flush_work() - Flush a FIP ctlr's workqueue |
| 453 | * @ctlr: Pointer to the FIP ctlr whose workqueue is to be flushed |
| 454 | */ |
| 455 | void fcoe_ctlr_device_flush_work(struct fcoe_ctlr_device *ctlr) |
| 456 | { |
| 457 | if (!fcoe_ctlr_work_q(ctlr)) { |
| 458 | printk(KERN_ERR |
| 459 | "ERROR: FIP Ctlr '%d' attempted to flush work, " |
| 460 | "when no workqueue created.\n", ctlr->id); |
| 461 | dump_stack(); |
| 462 | return; |
| 463 | } |
| 464 | |
| 465 | flush_workqueue(fcoe_ctlr_work_q(ctlr)); |
| 466 | } |
| 467 | |
| 468 | /** |
| 469 | * fcoe_ctlr_device_queue_work() - Schedule work for a FIP ctlr's workqueue |
| 470 | * @ctlr: Pointer to the FIP ctlr who owns the devloss workqueue |
| 471 | * @work: Work to queue for execution |
| 472 | * |
| 473 | * Return value: |
| 474 | * 1 on success / 0 already queued / < 0 for error |
| 475 | */ |
| 476 | int fcoe_ctlr_device_queue_work(struct fcoe_ctlr_device *ctlr, |
| 477 | struct work_struct *work) |
| 478 | { |
| 479 | if (unlikely(!fcoe_ctlr_work_q(ctlr))) { |
| 480 | printk(KERN_ERR |
| 481 | "ERROR: FIP Ctlr '%d' attempted to queue work, " |
| 482 | "when no workqueue created.\n", ctlr->id); |
| 483 | dump_stack(); |
| 484 | |
| 485 | return -EINVAL; |
| 486 | } |
| 487 | |
| 488 | return queue_work(fcoe_ctlr_work_q(ctlr), work); |
| 489 | } |
| 490 | |
| 491 | /** |
| 492 | * fcoe_ctlr_device_flush_devloss() - Flush a FIP ctlr's devloss workqueue |
| 493 | * @ctlr: Pointer to FIP ctlr whose workqueue is to be flushed |
| 494 | */ |
| 495 | void fcoe_ctlr_device_flush_devloss(struct fcoe_ctlr_device *ctlr) |
| 496 | { |
| 497 | if (!fcoe_ctlr_devloss_work_q(ctlr)) { |
| 498 | printk(KERN_ERR |
| 499 | "ERROR: FIP Ctlr '%d' attempted to flush work, " |
| 500 | "when no workqueue created.\n", ctlr->id); |
| 501 | dump_stack(); |
| 502 | return; |
| 503 | } |
| 504 | |
| 505 | flush_workqueue(fcoe_ctlr_devloss_work_q(ctlr)); |
| 506 | } |
| 507 | |
| 508 | /** |
| 509 | * fcoe_ctlr_device_queue_devloss_work() - Schedule work for a FIP ctlr's devloss workqueue |
| 510 | * @ctlr: Pointer to the FIP ctlr who owns the devloss workqueue |
| 511 | * @work: Work to queue for execution |
| 512 | * @delay: jiffies to delay the work queuing |
| 513 | * |
| 514 | * Return value: |
| 515 | * 1 on success / 0 already queued / < 0 for error |
| 516 | */ |
| 517 | int fcoe_ctlr_device_queue_devloss_work(struct fcoe_ctlr_device *ctlr, |
| 518 | struct delayed_work *work, |
| 519 | unsigned long delay) |
| 520 | { |
| 521 | if (unlikely(!fcoe_ctlr_devloss_work_q(ctlr))) { |
| 522 | printk(KERN_ERR |
| 523 | "ERROR: FIP Ctlr '%d' attempted to queue work, " |
| 524 | "when no workqueue created.\n", ctlr->id); |
| 525 | dump_stack(); |
| 526 | |
| 527 | return -EINVAL; |
| 528 | } |
| 529 | |
| 530 | return queue_delayed_work(fcoe_ctlr_devloss_work_q(ctlr), work, delay); |
| 531 | } |
| 532 | |
| 533 | static int fcoe_fcf_device_match(struct fcoe_fcf_device *new, |
| 534 | struct fcoe_fcf_device *old) |
| 535 | { |
| 536 | if (new->switch_name == old->switch_name && |
| 537 | new->fabric_name == old->fabric_name && |
| 538 | new->fc_map == old->fc_map && |
| 539 | compare_ether_addr(new->mac, old->mac) == 0) |
| 540 | return 1; |
| 541 | return 0; |
| 542 | } |
| 543 | |
| 544 | /** |
| 545 | * fcoe_ctlr_device_add() - Add a FIP ctlr to sysfs |
| 546 | * @parent: The parent device to which the fcoe_ctlr instance |
| 547 | * should be attached |
| 548 | * @f: The LLD's FCoE sysfs function template pointer |
| 549 | * @priv_size: Size to be allocated with the fcoe_ctlr_device for the LLD |
| 550 | * |
| 551 | * This routine allocates a FIP ctlr object with some additional memory |
| 552 | * for the LLD. The FIP ctlr is initialized, added to sysfs and then |
| 553 | * attributes are added to it. |
| 554 | */ |
| 555 | struct fcoe_ctlr_device *fcoe_ctlr_device_add(struct device *parent, |
| 556 | struct fcoe_sysfs_function_template *f, |
| 557 | int priv_size) |
| 558 | { |
| 559 | struct fcoe_ctlr_device *ctlr; |
| 560 | int error = 0; |
| 561 | |
| 562 | ctlr = kzalloc(sizeof(struct fcoe_ctlr_device) + priv_size, |
| 563 | GFP_KERNEL); |
| 564 | if (!ctlr) |
| 565 | goto out; |
| 566 | |
| 567 | ctlr->id = atomic_inc_return(&ctlr_num) - 1; |
| 568 | ctlr->f = f; |
| 569 | INIT_LIST_HEAD(&ctlr->fcfs); |
| 570 | mutex_init(&ctlr->lock); |
| 571 | ctlr->dev.parent = parent; |
| 572 | ctlr->dev.bus = &fcoe_bus_type; |
| 573 | ctlr->dev.type = &fcoe_ctlr_device_type; |
| 574 | |
| 575 | ctlr->fcf_dev_loss_tmo = fcoe_fcf_dev_loss_tmo; |
| 576 | |
| 577 | snprintf(ctlr->work_q_name, sizeof(ctlr->work_q_name), |
| 578 | "ctlr_wq_%d", ctlr->id); |
| 579 | ctlr->work_q = create_singlethread_workqueue( |
| 580 | ctlr->work_q_name); |
| 581 | if (!ctlr->work_q) |
| 582 | goto out_del; |
| 583 | |
| 584 | snprintf(ctlr->devloss_work_q_name, |
| 585 | sizeof(ctlr->devloss_work_q_name), |
| 586 | "ctlr_dl_wq_%d", ctlr->id); |
| 587 | ctlr->devloss_work_q = create_singlethread_workqueue( |
| 588 | ctlr->devloss_work_q_name); |
| 589 | if (!ctlr->devloss_work_q) |
| 590 | goto out_del_q; |
| 591 | |
| 592 | dev_set_name(&ctlr->dev, "ctlr_%d", ctlr->id); |
| 593 | error = device_register(&ctlr->dev); |
| 594 | if (error) |
| 595 | goto out_del_q2; |
| 596 | |
| 597 | return ctlr; |
| 598 | |
| 599 | out_del_q2: |
| 600 | destroy_workqueue(ctlr->devloss_work_q); |
| 601 | ctlr->devloss_work_q = NULL; |
| 602 | out_del_q: |
| 603 | destroy_workqueue(ctlr->work_q); |
| 604 | ctlr->work_q = NULL; |
| 605 | out_del: |
| 606 | kfree(ctlr); |
| 607 | out: |
| 608 | return NULL; |
| 609 | } |
| 610 | EXPORT_SYMBOL_GPL(fcoe_ctlr_device_add); |
| 611 | |
| 612 | /** |
| 613 | * fcoe_ctlr_device_delete() - Delete a FIP ctlr and its subtree from sysfs |
| 614 | * @ctlr: A pointer to the ctlr to be deleted |
| 615 | * |
| 616 | * Deletes a FIP ctlr and any fcfs attached |
| 617 | * to it. Deleting fcfs will cause their childen |
| 618 | * to be deleted as well. |
| 619 | * |
| 620 | * The ctlr is detached from sysfs and it's resources |
| 621 | * are freed (work q), but the memory is not freed |
| 622 | * until its last reference is released. |
| 623 | * |
| 624 | * This routine expects no locks to be held before |
| 625 | * calling. |
| 626 | * |
| 627 | * TODO: Currently there are no callbacks to clean up LLD data |
| 628 | * for a fcoe_fcf_device. LLDs must keep this in mind as they need |
| 629 | * to clean up each of their LLD data for all fcoe_fcf_device before |
| 630 | * calling fcoe_ctlr_device_delete. |
| 631 | */ |
| 632 | void fcoe_ctlr_device_delete(struct fcoe_ctlr_device *ctlr) |
| 633 | { |
| 634 | struct fcoe_fcf_device *fcf, *next; |
| 635 | /* Remove any attached fcfs */ |
| 636 | mutex_lock(&ctlr->lock); |
| 637 | list_for_each_entry_safe(fcf, next, |
| 638 | &ctlr->fcfs, peers) { |
| 639 | list_del(&fcf->peers); |
| 640 | fcf->state = FCOE_FCF_STATE_DELETED; |
| 641 | fcoe_ctlr_device_queue_work(ctlr, &fcf->delete_work); |
| 642 | } |
| 643 | mutex_unlock(&ctlr->lock); |
| 644 | |
| 645 | fcoe_ctlr_device_flush_work(ctlr); |
| 646 | |
| 647 | destroy_workqueue(ctlr->devloss_work_q); |
| 648 | ctlr->devloss_work_q = NULL; |
| 649 | destroy_workqueue(ctlr->work_q); |
| 650 | ctlr->work_q = NULL; |
| 651 | |
| 652 | device_unregister(&ctlr->dev); |
| 653 | } |
| 654 | EXPORT_SYMBOL_GPL(fcoe_ctlr_device_delete); |
| 655 | |
| 656 | /** |
| 657 | * fcoe_fcf_device_final_delete() - Final delete routine |
| 658 | * @work: The FIP fcf's embedded work struct |
| 659 | * |
| 660 | * It is expected that the fcf has been removed from |
| 661 | * the FIP ctlr's list before calling this routine. |
| 662 | */ |
| 663 | static void fcoe_fcf_device_final_delete(struct work_struct *work) |
| 664 | { |
| 665 | struct fcoe_fcf_device *fcf = |
| 666 | container_of(work, struct fcoe_fcf_device, delete_work); |
| 667 | struct fcoe_ctlr_device *ctlr = fcoe_fcf_dev_to_ctlr_dev(fcf); |
| 668 | |
| 669 | /* |
| 670 | * Cancel any outstanding timers. These should really exist |
| 671 | * only when rmmod'ing the LLDD and we're asking for |
| 672 | * immediate termination of the rports |
| 673 | */ |
| 674 | if (!cancel_delayed_work(&fcf->dev_loss_work)) |
| 675 | fcoe_ctlr_device_flush_devloss(ctlr); |
| 676 | |
| 677 | device_unregister(&fcf->dev); |
| 678 | } |
| 679 | |
| 680 | /** |
| 681 | * fip_timeout_deleted_fcf() - Delete a fcf when the devloss timer fires |
| 682 | * @work: The FIP fcf's embedded work struct |
| 683 | * |
| 684 | * Removes the fcf from the FIP ctlr's list of fcfs and |
| 685 | * queues the final deletion. |
| 686 | */ |
| 687 | static void fip_timeout_deleted_fcf(struct work_struct *work) |
| 688 | { |
| 689 | struct fcoe_fcf_device *fcf = |
| 690 | container_of(work, struct fcoe_fcf_device, dev_loss_work.work); |
| 691 | struct fcoe_ctlr_device *ctlr = fcoe_fcf_dev_to_ctlr_dev(fcf); |
| 692 | |
| 693 | mutex_lock(&ctlr->lock); |
| 694 | |
| 695 | /* |
| 696 | * If the fcf is deleted or reconnected before the timer |
| 697 | * fires the devloss queue will be flushed, but the state will |
| 698 | * either be CONNECTED or DELETED. If that is the case we |
| 699 | * cancel deleting the fcf. |
| 700 | */ |
| 701 | if (fcf->state != FCOE_FCF_STATE_DISCONNECTED) |
| 702 | goto out; |
| 703 | |
| 704 | dev_printk(KERN_ERR, &fcf->dev, |
| 705 | "FIP fcf connection time out: removing fcf\n"); |
| 706 | |
| 707 | list_del(&fcf->peers); |
| 708 | fcf->state = FCOE_FCF_STATE_DELETED; |
| 709 | fcoe_ctlr_device_queue_work(ctlr, &fcf->delete_work); |
| 710 | |
| 711 | out: |
| 712 | mutex_unlock(&ctlr->lock); |
| 713 | } |
| 714 | |
| 715 | /** |
| 716 | * fcoe_fcf_device_delete() - Delete a FIP fcf |
| 717 | * @fcf: Pointer to the fcf which is to be deleted |
| 718 | * |
| 719 | * Queues the FIP fcf on the devloss workqueue |
| 720 | * |
| 721 | * Expects the ctlr_attrs mutex to be held for fcf |
| 722 | * state change. |
| 723 | */ |
| 724 | void fcoe_fcf_device_delete(struct fcoe_fcf_device *fcf) |
| 725 | { |
| 726 | struct fcoe_ctlr_device *ctlr = fcoe_fcf_dev_to_ctlr_dev(fcf); |
| 727 | int timeout = fcf->dev_loss_tmo; |
| 728 | |
| 729 | if (fcf->state != FCOE_FCF_STATE_CONNECTED) |
| 730 | return; |
| 731 | |
| 732 | fcf->state = FCOE_FCF_STATE_DISCONNECTED; |
| 733 | |
| 734 | /* |
| 735 | * FCF will only be re-connected by the LLD calling |
| 736 | * fcoe_fcf_device_add, and it should be setting up |
| 737 | * priv then. |
| 738 | */ |
| 739 | fcf->priv = NULL; |
| 740 | |
| 741 | fcoe_ctlr_device_queue_devloss_work(ctlr, &fcf->dev_loss_work, |
| 742 | timeout * HZ); |
| 743 | } |
| 744 | EXPORT_SYMBOL_GPL(fcoe_fcf_device_delete); |
| 745 | |
| 746 | /** |
| 747 | * fcoe_fcf_device_add() - Add a FCoE sysfs fcoe_fcf_device to the system |
| 748 | * @ctlr: The fcoe_ctlr_device that will be the fcoe_fcf_device parent |
| 749 | * @new_fcf: A temporary FCF used for lookups on the current list of fcfs |
| 750 | * |
| 751 | * Expects to be called with the ctlr->lock held |
| 752 | */ |
| 753 | struct fcoe_fcf_device *fcoe_fcf_device_add(struct fcoe_ctlr_device *ctlr, |
| 754 | struct fcoe_fcf_device *new_fcf) |
| 755 | { |
| 756 | struct fcoe_fcf_device *fcf; |
| 757 | int error = 0; |
| 758 | |
| 759 | list_for_each_entry(fcf, &ctlr->fcfs, peers) { |
| 760 | if (fcoe_fcf_device_match(new_fcf, fcf)) { |
| 761 | if (fcf->state == FCOE_FCF_STATE_CONNECTED) |
| 762 | return fcf; |
| 763 | |
| 764 | fcf->state = FCOE_FCF_STATE_CONNECTED; |
| 765 | |
| 766 | if (!cancel_delayed_work(&fcf->dev_loss_work)) |
| 767 | fcoe_ctlr_device_flush_devloss(ctlr); |
| 768 | |
| 769 | return fcf; |
| 770 | } |
| 771 | } |
| 772 | |
| 773 | fcf = kzalloc(sizeof(struct fcoe_fcf_device), GFP_ATOMIC); |
| 774 | if (unlikely(!fcf)) |
| 775 | goto out; |
| 776 | |
| 777 | INIT_WORK(&fcf->delete_work, fcoe_fcf_device_final_delete); |
| 778 | INIT_DELAYED_WORK(&fcf->dev_loss_work, fip_timeout_deleted_fcf); |
| 779 | |
| 780 | fcf->dev.parent = &ctlr->dev; |
| 781 | fcf->dev.bus = &fcoe_bus_type; |
| 782 | fcf->dev.type = &fcoe_fcf_device_type; |
| 783 | fcf->id = atomic_inc_return(&fcf_num) - 1; |
| 784 | fcf->state = FCOE_FCF_STATE_UNKNOWN; |
| 785 | |
| 786 | fcf->dev_loss_tmo = ctlr->fcf_dev_loss_tmo; |
| 787 | |
| 788 | dev_set_name(&fcf->dev, "fcf_%d", fcf->id); |
| 789 | |
| 790 | fcf->fabric_name = new_fcf->fabric_name; |
| 791 | fcf->switch_name = new_fcf->switch_name; |
| 792 | fcf->fc_map = new_fcf->fc_map; |
| 793 | fcf->vfid = new_fcf->vfid; |
| 794 | memcpy(fcf->mac, new_fcf->mac, ETH_ALEN); |
| 795 | fcf->priority = new_fcf->priority; |
| 796 | fcf->fka_period = new_fcf->fka_period; |
| 797 | fcf->selected = new_fcf->selected; |
| 798 | |
| 799 | error = device_register(&fcf->dev); |
| 800 | if (error) |
| 801 | goto out_del; |
| 802 | |
| 803 | fcf->state = FCOE_FCF_STATE_CONNECTED; |
| 804 | list_add_tail(&fcf->peers, &ctlr->fcfs); |
| 805 | |
| 806 | return fcf; |
| 807 | |
| 808 | out_del: |
| 809 | kfree(fcf); |
| 810 | out: |
| 811 | return NULL; |
| 812 | } |
| 813 | EXPORT_SYMBOL_GPL(fcoe_fcf_device_add); |
| 814 | |
| 815 | int __init fcoe_sysfs_setup(void) |
| 816 | { |
| 817 | int error; |
| 818 | |
| 819 | atomic_set(&ctlr_num, 0); |
| 820 | atomic_set(&fcf_num, 0); |
| 821 | |
| 822 | error = bus_register(&fcoe_bus_type); |
| 823 | if (error) |
| 824 | return error; |
| 825 | |
| 826 | return 0; |
| 827 | } |
| 828 | |
| 829 | void __exit fcoe_sysfs_teardown(void) |
| 830 | { |
| 831 | bus_unregister(&fcoe_bus_type); |
| 832 | } |