Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * FiberChannel transport specific attributes exported to sysfs. |
| 3 | * |
| 4 | * Copyright (c) 2003 Silicon Graphics, Inc. All rights reserved. |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 19 | * |
| 20 | * ======== |
| 21 | * |
| 22 | * Copyright (C) 2004-2005 James Smart, Emulex Corporation |
| 23 | * Rewrite for host, target, device, and remote port attributes, |
| 24 | * statistics, and service functions... |
| 25 | * |
| 26 | */ |
| 27 | #include <linux/module.h> |
| 28 | #include <linux/init.h> |
| 29 | #include <scsi/scsi_device.h> |
| 30 | #include <scsi/scsi_host.h> |
| 31 | #include <scsi/scsi_transport.h> |
| 32 | #include <scsi/scsi_transport_fc.h> |
James Smart | c829c39 | 2006-03-13 08:28:57 -0500 | [diff] [blame] | 33 | #include <scsi/scsi_cmnd.h> |
James Smart | 84314fd | 2006-08-18 17:30:09 -0400 | [diff] [blame] | 34 | #include <linux/netlink.h> |
| 35 | #include <net/netlink.h> |
| 36 | #include <scsi/scsi_netlink_fc.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | #include "scsi_priv.h" |
| 38 | |
James Smart | aedf349 | 2006-04-10 10:14:05 -0400 | [diff] [blame] | 39 | static int fc_queue_work(struct Scsi_Host *, struct work_struct *); |
| 40 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | /* |
| 42 | * Redefine so that we can have same named attributes in the |
| 43 | * sdev/starget/host objects. |
| 44 | */ |
| 45 | #define FC_CLASS_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \ |
| 46 | struct class_device_attribute class_device_attr_##_prefix##_##_name = \ |
| 47 | __ATTR(_name,_mode,_show,_store) |
| 48 | |
| 49 | #define fc_enum_name_search(title, table_type, table) \ |
| 50 | static const char *get_fc_##title##_name(enum table_type table_key) \ |
| 51 | { \ |
| 52 | int i; \ |
| 53 | char *name = NULL; \ |
| 54 | \ |
Tobias Klauser | 6391a11 | 2006-06-08 22:23:48 -0700 | [diff] [blame] | 55 | for (i = 0; i < ARRAY_SIZE(table); i++) { \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | if (table[i].value == table_key) { \ |
| 57 | name = table[i].name; \ |
| 58 | break; \ |
| 59 | } \ |
| 60 | } \ |
| 61 | return name; \ |
| 62 | } |
| 63 | |
| 64 | #define fc_enum_name_match(title, table_type, table) \ |
| 65 | static int get_fc_##title##_match(const char *table_key, \ |
| 66 | enum table_type *value) \ |
| 67 | { \ |
| 68 | int i; \ |
| 69 | \ |
Tobias Klauser | 6391a11 | 2006-06-08 22:23:48 -0700 | [diff] [blame] | 70 | for (i = 0; i < ARRAY_SIZE(table); i++) { \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | if (strncmp(table_key, table[i].name, \ |
| 72 | table[i].matchlen) == 0) { \ |
| 73 | *value = table[i].value; \ |
| 74 | return 0; /* success */ \ |
| 75 | } \ |
| 76 | } \ |
| 77 | return 1; /* failure */ \ |
| 78 | } |
| 79 | |
| 80 | |
| 81 | /* Convert fc_port_type values to ascii string name */ |
| 82 | static struct { |
| 83 | enum fc_port_type value; |
| 84 | char *name; |
| 85 | } fc_port_type_names[] = { |
| 86 | { FC_PORTTYPE_UNKNOWN, "Unknown" }, |
| 87 | { FC_PORTTYPE_OTHER, "Other" }, |
| 88 | { FC_PORTTYPE_NOTPRESENT, "Not Present" }, |
| 89 | { FC_PORTTYPE_NPORT, "NPort (fabric via point-to-point)" }, |
| 90 | { FC_PORTTYPE_NLPORT, "NLPort (fabric via loop)" }, |
| 91 | { FC_PORTTYPE_LPORT, "LPort (private loop)" }, |
| 92 | { FC_PORTTYPE_PTP, "Point-To-Point (direct nport connection" }, |
| 93 | }; |
| 94 | fc_enum_name_search(port_type, fc_port_type, fc_port_type_names) |
| 95 | #define FC_PORTTYPE_MAX_NAMELEN 50 |
| 96 | |
| 97 | |
James Smart | 84314fd | 2006-08-18 17:30:09 -0400 | [diff] [blame] | 98 | /* Convert fc_host_event_code values to ascii string name */ |
| 99 | static const struct { |
| 100 | enum fc_host_event_code value; |
| 101 | char *name; |
| 102 | } fc_host_event_code_names[] = { |
| 103 | { FCH_EVT_LIP, "lip" }, |
| 104 | { FCH_EVT_LINKUP, "link_up" }, |
| 105 | { FCH_EVT_LINKDOWN, "link_down" }, |
| 106 | { FCH_EVT_LIPRESET, "lip_reset" }, |
| 107 | { FCH_EVT_RSCN, "rscn" }, |
| 108 | { FCH_EVT_ADAPTER_CHANGE, "adapter_chg" }, |
| 109 | { FCH_EVT_PORT_UNKNOWN, "port_unknown" }, |
| 110 | { FCH_EVT_PORT_ONLINE, "port_online" }, |
| 111 | { FCH_EVT_PORT_OFFLINE, "port_offline" }, |
| 112 | { FCH_EVT_PORT_FABRIC, "port_fabric" }, |
| 113 | { FCH_EVT_LINK_UNKNOWN, "link_unknown" }, |
| 114 | { FCH_EVT_VENDOR_UNIQUE, "vendor_unique" }, |
| 115 | }; |
| 116 | fc_enum_name_search(host_event_code, fc_host_event_code, |
| 117 | fc_host_event_code_names) |
| 118 | #define FC_HOST_EVENT_CODE_MAX_NAMELEN 30 |
| 119 | |
| 120 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | /* Convert fc_port_state values to ascii string name */ |
| 122 | static struct { |
| 123 | enum fc_port_state value; |
| 124 | char *name; |
| 125 | } fc_port_state_names[] = { |
| 126 | { FC_PORTSTATE_UNKNOWN, "Unknown" }, |
| 127 | { FC_PORTSTATE_NOTPRESENT, "Not Present" }, |
| 128 | { FC_PORTSTATE_ONLINE, "Online" }, |
| 129 | { FC_PORTSTATE_OFFLINE, "Offline" }, |
| 130 | { FC_PORTSTATE_BLOCKED, "Blocked" }, |
| 131 | { FC_PORTSTATE_BYPASSED, "Bypassed" }, |
| 132 | { FC_PORTSTATE_DIAGNOSTICS, "Diagnostics" }, |
| 133 | { FC_PORTSTATE_LINKDOWN, "Linkdown" }, |
| 134 | { FC_PORTSTATE_ERROR, "Error" }, |
| 135 | { FC_PORTSTATE_LOOPBACK, "Loopback" }, |
James.Smart@Emulex.Com | 42e3314 | 2005-12-15 09:56:22 -0500 | [diff] [blame] | 136 | { FC_PORTSTATE_DELETED, "Deleted" }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 137 | }; |
| 138 | fc_enum_name_search(port_state, fc_port_state, fc_port_state_names) |
| 139 | #define FC_PORTSTATE_MAX_NAMELEN 20 |
| 140 | |
| 141 | |
| 142 | /* Convert fc_tgtid_binding_type values to ascii string name */ |
Arjan van de Ven | 0ad7820 | 2005-11-28 16:22:25 +0100 | [diff] [blame] | 143 | static const struct { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | enum fc_tgtid_binding_type value; |
| 145 | char *name; |
| 146 | int matchlen; |
| 147 | } fc_tgtid_binding_type_names[] = { |
| 148 | { FC_TGTID_BIND_NONE, "none", 4 }, |
| 149 | { FC_TGTID_BIND_BY_WWPN, "wwpn (World Wide Port Name)", 4 }, |
| 150 | { FC_TGTID_BIND_BY_WWNN, "wwnn (World Wide Node Name)", 4 }, |
| 151 | { FC_TGTID_BIND_BY_ID, "port_id (FC Address)", 7 }, |
| 152 | }; |
| 153 | fc_enum_name_search(tgtid_bind_type, fc_tgtid_binding_type, |
| 154 | fc_tgtid_binding_type_names) |
| 155 | fc_enum_name_match(tgtid_bind_type, fc_tgtid_binding_type, |
| 156 | fc_tgtid_binding_type_names) |
| 157 | #define FC_BINDTYPE_MAX_NAMELEN 30 |
| 158 | |
| 159 | |
| 160 | #define fc_bitfield_name_search(title, table) \ |
| 161 | static ssize_t \ |
| 162 | get_fc_##title##_names(u32 table_key, char *buf) \ |
| 163 | { \ |
| 164 | char *prefix = ""; \ |
| 165 | ssize_t len = 0; \ |
| 166 | int i; \ |
| 167 | \ |
Tobias Klauser | 6391a11 | 2006-06-08 22:23:48 -0700 | [diff] [blame] | 168 | for (i = 0; i < ARRAY_SIZE(table); i++) { \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | if (table[i].value & table_key) { \ |
| 170 | len += sprintf(buf + len, "%s%s", \ |
| 171 | prefix, table[i].name); \ |
| 172 | prefix = ", "; \ |
| 173 | } \ |
| 174 | } \ |
| 175 | len += sprintf(buf + len, "\n"); \ |
| 176 | return len; \ |
| 177 | } |
| 178 | |
| 179 | |
| 180 | /* Convert FC_COS bit values to ascii string name */ |
Arjan van de Ven | 0ad7820 | 2005-11-28 16:22:25 +0100 | [diff] [blame] | 181 | static const struct { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | u32 value; |
| 183 | char *name; |
| 184 | } fc_cos_names[] = { |
| 185 | { FC_COS_CLASS1, "Class 1" }, |
| 186 | { FC_COS_CLASS2, "Class 2" }, |
| 187 | { FC_COS_CLASS3, "Class 3" }, |
| 188 | { FC_COS_CLASS4, "Class 4" }, |
| 189 | { FC_COS_CLASS6, "Class 6" }, |
| 190 | }; |
| 191 | fc_bitfield_name_search(cos, fc_cos_names) |
| 192 | |
| 193 | |
| 194 | /* Convert FC_PORTSPEED bit values to ascii string name */ |
Arjan van de Ven | 0ad7820 | 2005-11-28 16:22:25 +0100 | [diff] [blame] | 195 | static const struct { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | u32 value; |
| 197 | char *name; |
| 198 | } fc_port_speed_names[] = { |
| 199 | { FC_PORTSPEED_1GBIT, "1 Gbit" }, |
| 200 | { FC_PORTSPEED_2GBIT, "2 Gbit" }, |
| 201 | { FC_PORTSPEED_4GBIT, "4 Gbit" }, |
| 202 | { FC_PORTSPEED_10GBIT, "10 Gbit" }, |
| 203 | { FC_PORTSPEED_NOT_NEGOTIATED, "Not Negotiated" }, |
| 204 | }; |
| 205 | fc_bitfield_name_search(port_speed, fc_port_speed_names) |
| 206 | |
| 207 | |
| 208 | static int |
| 209 | show_fc_fc4s (char *buf, u8 *fc4_list) |
| 210 | { |
| 211 | int i, len=0; |
| 212 | |
| 213 | for (i = 0; i < FC_FC4_LIST_SIZE; i++, fc4_list++) |
| 214 | len += sprintf(buf + len , "0x%02x ", *fc4_list); |
| 215 | len += sprintf(buf + len, "\n"); |
| 216 | return len; |
| 217 | } |
| 218 | |
| 219 | |
| 220 | /* Convert FC_RPORT_ROLE bit values to ascii string name */ |
Arjan van de Ven | 0ad7820 | 2005-11-28 16:22:25 +0100 | [diff] [blame] | 221 | static const struct { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | u32 value; |
| 223 | char *name; |
| 224 | } fc_remote_port_role_names[] = { |
| 225 | { FC_RPORT_ROLE_FCP_TARGET, "FCP Target" }, |
| 226 | { FC_RPORT_ROLE_FCP_INITIATOR, "FCP Initiator" }, |
| 227 | { FC_RPORT_ROLE_IP_PORT, "IP Port" }, |
| 228 | }; |
| 229 | fc_bitfield_name_search(remote_port_roles, fc_remote_port_role_names) |
| 230 | |
| 231 | /* |
| 232 | * Define roles that are specific to port_id. Values are relative to ROLE_MASK. |
| 233 | */ |
| 234 | #define FC_WELLKNOWN_PORTID_MASK 0xfffff0 |
| 235 | #define FC_WELLKNOWN_ROLE_MASK 0x00000f |
| 236 | #define FC_FPORT_PORTID 0x00000e |
| 237 | #define FC_FABCTLR_PORTID 0x00000d |
| 238 | #define FC_DIRSRVR_PORTID 0x00000c |
| 239 | #define FC_TIMESRVR_PORTID 0x00000b |
| 240 | #define FC_MGMTSRVR_PORTID 0x00000a |
| 241 | |
| 242 | |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 243 | static void fc_timeout_deleted_rport(struct work_struct *work); |
| 244 | static void fc_timeout_fail_rport_io(struct work_struct *work); |
| 245 | static void fc_scsi_scan_rport(struct work_struct *work); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | |
| 247 | /* |
| 248 | * Attribute counts pre object type... |
| 249 | * Increase these values if you add attributes |
| 250 | */ |
| 251 | #define FC_STARGET_NUM_ATTRS 3 |
James Smart | 0f29b96 | 2006-08-18 17:33:29 -0400 | [diff] [blame] | 252 | #define FC_RPORT_NUM_ATTRS 10 |
Andreas Herrmann | ad139a2 | 2006-03-09 16:37:49 +0100 | [diff] [blame] | 253 | #define FC_HOST_NUM_ATTRS 17 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | |
| 255 | struct fc_internal { |
| 256 | struct scsi_transport_template t; |
| 257 | struct fc_function_template *f; |
| 258 | |
| 259 | /* |
| 260 | * For attributes : each object has : |
| 261 | * An array of the actual attributes structures |
| 262 | * An array of null-terminated pointers to the attribute |
| 263 | * structures - used for mid-layer interaction. |
| 264 | * |
| 265 | * The attribute containers for the starget and host are are |
| 266 | * part of the midlayer. As the remote port is specific to the |
| 267 | * fc transport, we must provide the attribute container. |
| 268 | */ |
| 269 | struct class_device_attribute private_starget_attrs[ |
| 270 | FC_STARGET_NUM_ATTRS]; |
| 271 | struct class_device_attribute *starget_attrs[FC_STARGET_NUM_ATTRS + 1]; |
| 272 | |
| 273 | struct class_device_attribute private_host_attrs[FC_HOST_NUM_ATTRS]; |
| 274 | struct class_device_attribute *host_attrs[FC_HOST_NUM_ATTRS + 1]; |
| 275 | |
| 276 | struct transport_container rport_attr_cont; |
| 277 | struct class_device_attribute private_rport_attrs[FC_RPORT_NUM_ATTRS]; |
| 278 | struct class_device_attribute *rport_attrs[FC_RPORT_NUM_ATTRS + 1]; |
| 279 | }; |
| 280 | |
| 281 | #define to_fc_internal(tmpl) container_of(tmpl, struct fc_internal, t) |
| 282 | |
James Bottomley | d0a7e57 | 2005-08-14 17:09:01 -0500 | [diff] [blame] | 283 | static int fc_target_setup(struct transport_container *tc, struct device *dev, |
| 284 | struct class_device *cdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 285 | { |
| 286 | struct scsi_target *starget = to_scsi_target(dev); |
| 287 | struct fc_rport *rport = starget_to_rport(starget); |
| 288 | |
| 289 | /* |
| 290 | * if parent is remote port, use values from remote port. |
| 291 | * Otherwise, this host uses the fc_transport, but not the |
| 292 | * remote port interface. As such, initialize to known non-values. |
| 293 | */ |
| 294 | if (rport) { |
| 295 | fc_starget_node_name(starget) = rport->node_name; |
| 296 | fc_starget_port_name(starget) = rport->port_name; |
| 297 | fc_starget_port_id(starget) = rport->port_id; |
| 298 | } else { |
| 299 | fc_starget_node_name(starget) = -1; |
| 300 | fc_starget_port_name(starget) = -1; |
| 301 | fc_starget_port_id(starget) = -1; |
| 302 | } |
| 303 | |
| 304 | return 0; |
| 305 | } |
| 306 | |
| 307 | static DECLARE_TRANSPORT_CLASS(fc_transport_class, |
| 308 | "fc_transport", |
| 309 | fc_target_setup, |
| 310 | NULL, |
| 311 | NULL); |
| 312 | |
James Bottomley | d0a7e57 | 2005-08-14 17:09:01 -0500 | [diff] [blame] | 313 | static int fc_host_setup(struct transport_container *tc, struct device *dev, |
| 314 | struct class_device *cdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | { |
| 316 | struct Scsi_Host *shost = dev_to_shost(dev); |
James Smart | aedf349 | 2006-04-10 10:14:05 -0400 | [diff] [blame] | 317 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 318 | |
| 319 | /* |
| 320 | * Set default values easily detected by the midlayer as |
| 321 | * failure cases. The scsi lldd is responsible for initializing |
| 322 | * all transport attributes to valid values per host. |
| 323 | */ |
James Smart | aedf349 | 2006-04-10 10:14:05 -0400 | [diff] [blame] | 324 | fc_host->node_name = -1; |
| 325 | fc_host->port_name = -1; |
| 326 | fc_host->permanent_port_name = -1; |
| 327 | fc_host->supported_classes = FC_COS_UNSPECIFIED; |
| 328 | memset(fc_host->supported_fc4s, 0, |
| 329 | sizeof(fc_host->supported_fc4s)); |
James Smart | aedf349 | 2006-04-10 10:14:05 -0400 | [diff] [blame] | 330 | fc_host->supported_speeds = FC_PORTSPEED_UNKNOWN; |
| 331 | fc_host->maxframe_size = -1; |
| 332 | memset(fc_host->serial_number, 0, |
| 333 | sizeof(fc_host->serial_number)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | |
James Smart | aedf349 | 2006-04-10 10:14:05 -0400 | [diff] [blame] | 335 | fc_host->port_id = -1; |
| 336 | fc_host->port_type = FC_PORTTYPE_UNKNOWN; |
| 337 | fc_host->port_state = FC_PORTSTATE_UNKNOWN; |
| 338 | memset(fc_host->active_fc4s, 0, |
| 339 | sizeof(fc_host->active_fc4s)); |
| 340 | fc_host->speed = FC_PORTSPEED_UNKNOWN; |
| 341 | fc_host->fabric_name = -1; |
James Smart | b8d0821 | 2006-08-17 08:00:43 -0400 | [diff] [blame] | 342 | memset(fc_host->symbolic_name, 0, sizeof(fc_host->symbolic_name)); |
| 343 | memset(fc_host->system_hostname, 0, sizeof(fc_host->system_hostname)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 344 | |
James Smart | aedf349 | 2006-04-10 10:14:05 -0400 | [diff] [blame] | 345 | fc_host->tgtid_bind_type = FC_TGTID_BIND_BY_WWPN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | |
James Smart | aedf349 | 2006-04-10 10:14:05 -0400 | [diff] [blame] | 347 | INIT_LIST_HEAD(&fc_host->rports); |
| 348 | INIT_LIST_HEAD(&fc_host->rport_bindings); |
| 349 | fc_host->next_rport_number = 0; |
| 350 | fc_host->next_target_id = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 351 | |
James Smart | aedf349 | 2006-04-10 10:14:05 -0400 | [diff] [blame] | 352 | snprintf(fc_host->work_q_name, KOBJ_NAME_LEN, "fc_wq_%d", |
| 353 | shost->host_no); |
| 354 | fc_host->work_q = create_singlethread_workqueue( |
| 355 | fc_host->work_q_name); |
| 356 | if (!fc_host->work_q) |
| 357 | return -ENOMEM; |
| 358 | |
| 359 | snprintf(fc_host->devloss_work_q_name, KOBJ_NAME_LEN, "fc_dl_%d", |
| 360 | shost->host_no); |
| 361 | fc_host->devloss_work_q = create_singlethread_workqueue( |
| 362 | fc_host->devloss_work_q_name); |
| 363 | if (!fc_host->devloss_work_q) { |
| 364 | destroy_workqueue(fc_host->work_q); |
| 365 | fc_host->work_q = NULL; |
| 366 | return -ENOMEM; |
| 367 | } |
| 368 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 369 | return 0; |
| 370 | } |
| 371 | |
| 372 | static DECLARE_TRANSPORT_CLASS(fc_host_class, |
| 373 | "fc_host", |
| 374 | fc_host_setup, |
| 375 | NULL, |
| 376 | NULL); |
| 377 | |
| 378 | /* |
| 379 | * Setup and Remove actions for remote ports are handled |
| 380 | * in the service functions below. |
| 381 | */ |
| 382 | static DECLARE_TRANSPORT_CLASS(fc_rport_class, |
| 383 | "fc_remote_ports", |
| 384 | NULL, |
| 385 | NULL, |
| 386 | NULL); |
| 387 | |
| 388 | /* |
| 389 | * Module Parameters |
| 390 | */ |
| 391 | |
| 392 | /* |
| 393 | * dev_loss_tmo: the default number of seconds that the FC transport |
| 394 | * should insulate the loss of a remote port. |
| 395 | * The maximum will be capped by the value of SCSI_DEVICE_BLOCK_MAX_TIMEOUT. |
| 396 | */ |
James Smart | 1c9e16e | 2006-05-16 16:13:36 -0400 | [diff] [blame] | 397 | static unsigned int fc_dev_loss_tmo = 60; /* seconds */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 398 | |
| 399 | module_param_named(dev_loss_tmo, fc_dev_loss_tmo, int, S_IRUGO|S_IWUSR); |
| 400 | MODULE_PARM_DESC(dev_loss_tmo, |
| 401 | "Maximum number of seconds that the FC transport should" |
| 402 | " insulate the loss of a remote port. Once this value is" |
| 403 | " exceeded, the scsi target is removed. Value should be" |
| 404 | " between 1 and SCSI_DEVICE_BLOCK_MAX_TIMEOUT."); |
| 405 | |
James Smart | 84314fd | 2006-08-18 17:30:09 -0400 | [diff] [blame] | 406 | /** |
| 407 | * Netlink Infrastructure |
| 408 | **/ |
| 409 | |
| 410 | static atomic_t fc_event_seq; |
| 411 | |
| 412 | /** |
| 413 | * fc_get_event_number - Obtain the next sequential FC event number |
| 414 | * |
| 415 | * Notes: |
| 416 | * We could have inline'd this, but it would have required fc_event_seq to |
| 417 | * be exposed. For now, live with the subroutine call. |
| 418 | * Atomic used to avoid lock/unlock... |
| 419 | **/ |
| 420 | u32 |
| 421 | fc_get_event_number(void) |
| 422 | { |
| 423 | return atomic_add_return(1, &fc_event_seq); |
| 424 | } |
| 425 | EXPORT_SYMBOL(fc_get_event_number); |
| 426 | |
| 427 | |
| 428 | /** |
| 429 | * fc_host_post_event - called to post an even on an fc_host. |
| 430 | * |
| 431 | * @shost: host the event occurred on |
| 432 | * @event_number: fc event number obtained from get_fc_event_number() |
| 433 | * @event_code: fc_host event being posted |
| 434 | * @event_data: 32bits of data for the event being posted |
| 435 | * |
| 436 | * Notes: |
| 437 | * This routine assumes no locks are held on entry. |
| 438 | **/ |
| 439 | void |
| 440 | fc_host_post_event(struct Scsi_Host *shost, u32 event_number, |
| 441 | enum fc_host_event_code event_code, u32 event_data) |
| 442 | { |
| 443 | struct sk_buff *skb; |
| 444 | struct nlmsghdr *nlh; |
| 445 | struct fc_nl_event *event; |
| 446 | const char *name; |
| 447 | u32 len, skblen; |
| 448 | int err; |
| 449 | |
| 450 | if (!scsi_nl_sock) { |
| 451 | err = -ENOENT; |
| 452 | goto send_fail; |
| 453 | } |
| 454 | |
| 455 | len = FC_NL_MSGALIGN(sizeof(*event)); |
| 456 | skblen = NLMSG_SPACE(len); |
| 457 | |
| 458 | skb = alloc_skb(skblen, GFP_KERNEL); |
| 459 | if (!skb) { |
| 460 | err = -ENOBUFS; |
| 461 | goto send_fail; |
| 462 | } |
| 463 | |
| 464 | nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, |
| 465 | skblen - sizeof(*nlh), 0); |
| 466 | if (!nlh) { |
| 467 | err = -ENOBUFS; |
| 468 | goto send_fail_skb; |
| 469 | } |
| 470 | event = NLMSG_DATA(nlh); |
| 471 | |
| 472 | INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC, |
| 473 | FC_NL_ASYNC_EVENT, len); |
| 474 | event->seconds = get_seconds(); |
| 475 | event->vendor_id = 0; |
| 476 | event->host_no = shost->host_no; |
| 477 | event->event_datalen = sizeof(u32); /* bytes */ |
| 478 | event->event_num = event_number; |
| 479 | event->event_code = event_code; |
| 480 | event->event_data = event_data; |
| 481 | |
James Bottomley | 1b73c4b | 2006-09-23 22:07:20 -0500 | [diff] [blame] | 482 | err = nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS, |
| 483 | GFP_KERNEL); |
James Smart | 84314fd | 2006-08-18 17:30:09 -0400 | [diff] [blame] | 484 | if (err && (err != -ESRCH)) /* filter no recipient errors */ |
| 485 | /* nlmsg_multicast already kfree_skb'd */ |
| 486 | goto send_fail; |
| 487 | |
| 488 | return; |
| 489 | |
| 490 | send_fail_skb: |
| 491 | kfree_skb(skb); |
| 492 | send_fail: |
| 493 | name = get_fc_host_event_code_name(event_code); |
| 494 | printk(KERN_WARNING |
| 495 | "%s: Dropped Event : host %d %s data 0x%08x - err %d\n", |
| 496 | __FUNCTION__, shost->host_no, |
| 497 | (name) ? name : "<unknown>", event_data, err); |
| 498 | return; |
| 499 | } |
| 500 | EXPORT_SYMBOL(fc_host_post_event); |
| 501 | |
| 502 | |
| 503 | /** |
| 504 | * fc_host_post_vendor_event - called to post a vendor unique event on |
| 505 | * a fc_host |
| 506 | * |
| 507 | * @shost: host the event occurred on |
| 508 | * @event_number: fc event number obtained from get_fc_event_number() |
| 509 | * @data_len: amount, in bytes, of vendor unique data |
| 510 | * @data_buf: pointer to vendor unique data |
| 511 | * |
| 512 | * Notes: |
| 513 | * This routine assumes no locks are held on entry. |
| 514 | **/ |
| 515 | void |
| 516 | fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number, |
James Smart | f14e2e2 | 2006-08-22 09:55:23 -0400 | [diff] [blame] | 517 | u32 data_len, char * data_buf, u64 vendor_id) |
James Smart | 84314fd | 2006-08-18 17:30:09 -0400 | [diff] [blame] | 518 | { |
| 519 | struct sk_buff *skb; |
| 520 | struct nlmsghdr *nlh; |
| 521 | struct fc_nl_event *event; |
| 522 | u32 len, skblen; |
| 523 | int err; |
| 524 | |
| 525 | if (!scsi_nl_sock) { |
| 526 | err = -ENOENT; |
| 527 | goto send_vendor_fail; |
| 528 | } |
| 529 | |
| 530 | len = FC_NL_MSGALIGN(sizeof(*event) + data_len); |
| 531 | skblen = NLMSG_SPACE(len); |
| 532 | |
| 533 | skb = alloc_skb(skblen, GFP_KERNEL); |
| 534 | if (!skb) { |
| 535 | err = -ENOBUFS; |
| 536 | goto send_vendor_fail; |
| 537 | } |
| 538 | |
| 539 | nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, |
| 540 | skblen - sizeof(*nlh), 0); |
| 541 | if (!nlh) { |
| 542 | err = -ENOBUFS; |
| 543 | goto send_vendor_fail_skb; |
| 544 | } |
| 545 | event = NLMSG_DATA(nlh); |
| 546 | |
| 547 | INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC, |
| 548 | FC_NL_ASYNC_EVENT, len); |
| 549 | event->seconds = get_seconds(); |
| 550 | event->vendor_id = vendor_id; |
| 551 | event->host_no = shost->host_no; |
| 552 | event->event_datalen = data_len; /* bytes */ |
| 553 | event->event_num = event_number; |
| 554 | event->event_code = FCH_EVT_VENDOR_UNIQUE; |
| 555 | memcpy(&event->event_data, data_buf, data_len); |
| 556 | |
James Bottomley | 1b73c4b | 2006-09-23 22:07:20 -0500 | [diff] [blame] | 557 | err = nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS, |
| 558 | GFP_KERNEL); |
James Smart | 84314fd | 2006-08-18 17:30:09 -0400 | [diff] [blame] | 559 | if (err && (err != -ESRCH)) /* filter no recipient errors */ |
| 560 | /* nlmsg_multicast already kfree_skb'd */ |
| 561 | goto send_vendor_fail; |
| 562 | |
| 563 | return; |
| 564 | |
| 565 | send_vendor_fail_skb: |
| 566 | kfree_skb(skb); |
| 567 | send_vendor_fail: |
| 568 | printk(KERN_WARNING |
| 569 | "%s: Dropped Event : host %d vendor_unique - err %d\n", |
| 570 | __FUNCTION__, shost->host_no, err); |
| 571 | return; |
| 572 | } |
| 573 | EXPORT_SYMBOL(fc_host_post_vendor_event); |
| 574 | |
| 575 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 576 | |
| 577 | static __init int fc_transport_init(void) |
| 578 | { |
James Smart | 84314fd | 2006-08-18 17:30:09 -0400 | [diff] [blame] | 579 | int error; |
| 580 | |
| 581 | atomic_set(&fc_event_seq, 0); |
| 582 | |
| 583 | error = transport_class_register(&fc_host_class); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 584 | if (error) |
| 585 | return error; |
| 586 | error = transport_class_register(&fc_rport_class); |
| 587 | if (error) |
| 588 | return error; |
| 589 | return transport_class_register(&fc_transport_class); |
| 590 | } |
| 591 | |
| 592 | static void __exit fc_transport_exit(void) |
| 593 | { |
| 594 | transport_class_unregister(&fc_transport_class); |
| 595 | transport_class_unregister(&fc_rport_class); |
| 596 | transport_class_unregister(&fc_host_class); |
| 597 | } |
| 598 | |
| 599 | /* |
| 600 | * FC Remote Port Attribute Management |
| 601 | */ |
| 602 | |
| 603 | #define fc_rport_show_function(field, format_string, sz, cast) \ |
| 604 | static ssize_t \ |
| 605 | show_fc_rport_##field (struct class_device *cdev, char *buf) \ |
| 606 | { \ |
| 607 | struct fc_rport *rport = transport_class_to_rport(cdev); \ |
| 608 | struct Scsi_Host *shost = rport_to_shost(rport); \ |
| 609 | struct fc_internal *i = to_fc_internal(shost->transportt); \ |
James.Smart@Emulex.Com | 19a7b4a | 2005-10-18 12:03:35 -0400 | [diff] [blame] | 610 | if ((i->f->get_rport_##field) && \ |
| 611 | !((rport->port_state == FC_PORTSTATE_BLOCKED) || \ |
James.Smart@Emulex.Com | 42e3314 | 2005-12-15 09:56:22 -0500 | [diff] [blame] | 612 | (rport->port_state == FC_PORTSTATE_DELETED) || \ |
James.Smart@Emulex.Com | 19a7b4a | 2005-10-18 12:03:35 -0400 | [diff] [blame] | 613 | (rport->port_state == FC_PORTSTATE_NOTPRESENT))) \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 614 | i->f->get_rport_##field(rport); \ |
| 615 | return snprintf(buf, sz, format_string, cast rport->field); \ |
| 616 | } |
| 617 | |
| 618 | #define fc_rport_store_function(field) \ |
| 619 | static ssize_t \ |
| 620 | store_fc_rport_##field(struct class_device *cdev, const char *buf, \ |
| 621 | size_t count) \ |
| 622 | { \ |
| 623 | int val; \ |
| 624 | struct fc_rport *rport = transport_class_to_rport(cdev); \ |
| 625 | struct Scsi_Host *shost = rport_to_shost(rport); \ |
| 626 | struct fc_internal *i = to_fc_internal(shost->transportt); \ |
James Smart | 0f29b96 | 2006-08-18 17:33:29 -0400 | [diff] [blame] | 627 | char *cp; \ |
James.Smart@Emulex.Com | 19a7b4a | 2005-10-18 12:03:35 -0400 | [diff] [blame] | 628 | if ((rport->port_state == FC_PORTSTATE_BLOCKED) || \ |
James.Smart@Emulex.Com | 42e3314 | 2005-12-15 09:56:22 -0500 | [diff] [blame] | 629 | (rport->port_state == FC_PORTSTATE_DELETED) || \ |
James.Smart@Emulex.Com | 19a7b4a | 2005-10-18 12:03:35 -0400 | [diff] [blame] | 630 | (rport->port_state == FC_PORTSTATE_NOTPRESENT)) \ |
| 631 | return -EBUSY; \ |
James Smart | 0f29b96 | 2006-08-18 17:33:29 -0400 | [diff] [blame] | 632 | val = simple_strtoul(buf, &cp, 0); \ |
| 633 | if (*cp && (*cp != '\n')) \ |
| 634 | return -EINVAL; \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 635 | i->f->set_rport_##field(rport, val); \ |
| 636 | return count; \ |
| 637 | } |
| 638 | |
| 639 | #define fc_rport_rd_attr(field, format_string, sz) \ |
| 640 | fc_rport_show_function(field, format_string, sz, ) \ |
| 641 | static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO, \ |
| 642 | show_fc_rport_##field, NULL) |
| 643 | |
| 644 | #define fc_rport_rd_attr_cast(field, format_string, sz, cast) \ |
| 645 | fc_rport_show_function(field, format_string, sz, (cast)) \ |
| 646 | static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO, \ |
| 647 | show_fc_rport_##field, NULL) |
| 648 | |
| 649 | #define fc_rport_rw_attr(field, format_string, sz) \ |
| 650 | fc_rport_show_function(field, format_string, sz, ) \ |
| 651 | fc_rport_store_function(field) \ |
| 652 | static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR, \ |
| 653 | show_fc_rport_##field, \ |
| 654 | store_fc_rport_##field) |
| 655 | |
| 656 | |
| 657 | #define fc_private_rport_show_function(field, format_string, sz, cast) \ |
| 658 | static ssize_t \ |
| 659 | show_fc_rport_##field (struct class_device *cdev, char *buf) \ |
| 660 | { \ |
| 661 | struct fc_rport *rport = transport_class_to_rport(cdev); \ |
| 662 | return snprintf(buf, sz, format_string, cast rport->field); \ |
| 663 | } |
| 664 | |
| 665 | #define fc_private_rport_rd_attr(field, format_string, sz) \ |
| 666 | fc_private_rport_show_function(field, format_string, sz, ) \ |
| 667 | static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO, \ |
| 668 | show_fc_rport_##field, NULL) |
| 669 | |
| 670 | #define fc_private_rport_rd_attr_cast(field, format_string, sz, cast) \ |
| 671 | fc_private_rport_show_function(field, format_string, sz, (cast)) \ |
| 672 | static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO, \ |
| 673 | show_fc_rport_##field, NULL) |
| 674 | |
| 675 | |
| 676 | #define fc_private_rport_rd_enum_attr(title, maxlen) \ |
| 677 | static ssize_t \ |
| 678 | show_fc_rport_##title (struct class_device *cdev, char *buf) \ |
| 679 | { \ |
| 680 | struct fc_rport *rport = transport_class_to_rport(cdev); \ |
| 681 | const char *name; \ |
| 682 | name = get_fc_##title##_name(rport->title); \ |
| 683 | if (!name) \ |
| 684 | return -EINVAL; \ |
| 685 | return snprintf(buf, maxlen, "%s\n", name); \ |
| 686 | } \ |
| 687 | static FC_CLASS_DEVICE_ATTR(rport, title, S_IRUGO, \ |
| 688 | show_fc_rport_##title, NULL) |
| 689 | |
| 690 | |
| 691 | #define SETUP_RPORT_ATTRIBUTE_RD(field) \ |
| 692 | i->private_rport_attrs[count] = class_device_attr_rport_##field; \ |
| 693 | i->private_rport_attrs[count].attr.mode = S_IRUGO; \ |
| 694 | i->private_rport_attrs[count].store = NULL; \ |
| 695 | i->rport_attrs[count] = &i->private_rport_attrs[count]; \ |
| 696 | if (i->f->show_rport_##field) \ |
| 697 | count++ |
| 698 | |
| 699 | #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field) \ |
| 700 | i->private_rport_attrs[count] = class_device_attr_rport_##field; \ |
| 701 | i->private_rport_attrs[count].attr.mode = S_IRUGO; \ |
| 702 | i->private_rport_attrs[count].store = NULL; \ |
| 703 | i->rport_attrs[count] = &i->private_rport_attrs[count]; \ |
| 704 | count++ |
| 705 | |
| 706 | #define SETUP_RPORT_ATTRIBUTE_RW(field) \ |
| 707 | i->private_rport_attrs[count] = class_device_attr_rport_##field; \ |
| 708 | if (!i->f->set_rport_##field) { \ |
| 709 | i->private_rport_attrs[count].attr.mode = S_IRUGO; \ |
| 710 | i->private_rport_attrs[count].store = NULL; \ |
| 711 | } \ |
| 712 | i->rport_attrs[count] = &i->private_rport_attrs[count]; \ |
| 713 | if (i->f->show_rport_##field) \ |
| 714 | count++ |
| 715 | |
James Smart | 0f29b96 | 2006-08-18 17:33:29 -0400 | [diff] [blame] | 716 | #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(field) \ |
| 717 | { \ |
| 718 | i->private_rport_attrs[count] = class_device_attr_rport_##field; \ |
| 719 | i->rport_attrs[count] = &i->private_rport_attrs[count]; \ |
| 720 | count++; \ |
| 721 | } |
| 722 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 723 | |
| 724 | /* The FC Transport Remote Port Attributes: */ |
| 725 | |
| 726 | /* Fixed Remote Port Attributes */ |
| 727 | |
| 728 | fc_private_rport_rd_attr(maxframe_size, "%u bytes\n", 20); |
| 729 | |
| 730 | static ssize_t |
| 731 | show_fc_rport_supported_classes (struct class_device *cdev, char *buf) |
| 732 | { |
| 733 | struct fc_rport *rport = transport_class_to_rport(cdev); |
| 734 | if (rport->supported_classes == FC_COS_UNSPECIFIED) |
| 735 | return snprintf(buf, 20, "unspecified\n"); |
| 736 | return get_fc_cos_names(rport->supported_classes, buf); |
| 737 | } |
| 738 | static FC_CLASS_DEVICE_ATTR(rport, supported_classes, S_IRUGO, |
| 739 | show_fc_rport_supported_classes, NULL); |
| 740 | |
| 741 | /* Dynamic Remote Port Attributes */ |
| 742 | |
James.Smart@Emulex.Com | 19a7b4a | 2005-10-18 12:03:35 -0400 | [diff] [blame] | 743 | /* |
| 744 | * dev_loss_tmo attribute |
| 745 | */ |
| 746 | fc_rport_show_function(dev_loss_tmo, "%d\n", 20, ) |
| 747 | static ssize_t |
| 748 | store_fc_rport_dev_loss_tmo(struct class_device *cdev, const char *buf, |
| 749 | size_t count) |
| 750 | { |
| 751 | int val; |
| 752 | struct fc_rport *rport = transport_class_to_rport(cdev); |
| 753 | struct Scsi_Host *shost = rport_to_shost(rport); |
| 754 | struct fc_internal *i = to_fc_internal(shost->transportt); |
James Smart | 0f29b96 | 2006-08-18 17:33:29 -0400 | [diff] [blame] | 755 | char *cp; |
James.Smart@Emulex.Com | 19a7b4a | 2005-10-18 12:03:35 -0400 | [diff] [blame] | 756 | if ((rport->port_state == FC_PORTSTATE_BLOCKED) || |
James.Smart@Emulex.Com | 42e3314 | 2005-12-15 09:56:22 -0500 | [diff] [blame] | 757 | (rport->port_state == FC_PORTSTATE_DELETED) || |
James.Smart@Emulex.Com | 19a7b4a | 2005-10-18 12:03:35 -0400 | [diff] [blame] | 758 | (rport->port_state == FC_PORTSTATE_NOTPRESENT)) |
| 759 | return -EBUSY; |
James Smart | 0f29b96 | 2006-08-18 17:33:29 -0400 | [diff] [blame] | 760 | val = simple_strtoul(buf, &cp, 0); |
| 761 | if ((*cp && (*cp != '\n')) || |
| 762 | (val < 0) || (val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT)) |
James.Smart@Emulex.Com | 19a7b4a | 2005-10-18 12:03:35 -0400 | [diff] [blame] | 763 | return -EINVAL; |
| 764 | i->f->set_rport_dev_loss_tmo(rport, val); |
| 765 | return count; |
| 766 | } |
| 767 | static FC_CLASS_DEVICE_ATTR(rport, dev_loss_tmo, S_IRUGO | S_IWUSR, |
| 768 | show_fc_rport_dev_loss_tmo, store_fc_rport_dev_loss_tmo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 769 | |
| 770 | |
| 771 | /* Private Remote Port Attributes */ |
| 772 | |
| 773 | fc_private_rport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); |
| 774 | fc_private_rport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); |
| 775 | fc_private_rport_rd_attr(port_id, "0x%06x\n", 20); |
| 776 | |
| 777 | static ssize_t |
| 778 | show_fc_rport_roles (struct class_device *cdev, char *buf) |
| 779 | { |
| 780 | struct fc_rport *rport = transport_class_to_rport(cdev); |
| 781 | |
| 782 | /* identify any roles that are port_id specific */ |
| 783 | if ((rport->port_id != -1) && |
| 784 | (rport->port_id & FC_WELLKNOWN_PORTID_MASK) == |
| 785 | FC_WELLKNOWN_PORTID_MASK) { |
| 786 | switch (rport->port_id & FC_WELLKNOWN_ROLE_MASK) { |
| 787 | case FC_FPORT_PORTID: |
| 788 | return snprintf(buf, 30, "Fabric Port\n"); |
| 789 | case FC_FABCTLR_PORTID: |
| 790 | return snprintf(buf, 30, "Fabric Controller\n"); |
| 791 | case FC_DIRSRVR_PORTID: |
| 792 | return snprintf(buf, 30, "Directory Server\n"); |
| 793 | case FC_TIMESRVR_PORTID: |
| 794 | return snprintf(buf, 30, "Time Server\n"); |
| 795 | case FC_MGMTSRVR_PORTID: |
| 796 | return snprintf(buf, 30, "Management Server\n"); |
| 797 | default: |
| 798 | return snprintf(buf, 30, "Unknown Fabric Entity\n"); |
| 799 | } |
| 800 | } else { |
| 801 | if (rport->roles == FC_RPORT_ROLE_UNKNOWN) |
| 802 | return snprintf(buf, 20, "unknown\n"); |
| 803 | return get_fc_remote_port_roles_names(rport->roles, buf); |
| 804 | } |
| 805 | } |
| 806 | static FC_CLASS_DEVICE_ATTR(rport, roles, S_IRUGO, |
| 807 | show_fc_rport_roles, NULL); |
| 808 | |
| 809 | fc_private_rport_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN); |
| 810 | fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20); |
| 811 | |
James Smart | 0f29b96 | 2006-08-18 17:33:29 -0400 | [diff] [blame] | 812 | /* |
| 813 | * fast_io_fail_tmo attribute |
| 814 | */ |
| 815 | static ssize_t |
| 816 | show_fc_rport_fast_io_fail_tmo (struct class_device *cdev, char *buf) |
| 817 | { |
| 818 | struct fc_rport *rport = transport_class_to_rport(cdev); |
| 819 | |
| 820 | if (rport->fast_io_fail_tmo == -1) |
| 821 | return snprintf(buf, 5, "off\n"); |
| 822 | return snprintf(buf, 20, "%d\n", rport->fast_io_fail_tmo); |
| 823 | } |
| 824 | |
| 825 | static ssize_t |
| 826 | store_fc_rport_fast_io_fail_tmo(struct class_device *cdev, const char *buf, |
| 827 | size_t count) |
| 828 | { |
| 829 | int val; |
| 830 | char *cp; |
| 831 | struct fc_rport *rport = transport_class_to_rport(cdev); |
| 832 | |
| 833 | if ((rport->port_state == FC_PORTSTATE_BLOCKED) || |
| 834 | (rport->port_state == FC_PORTSTATE_DELETED) || |
| 835 | (rport->port_state == FC_PORTSTATE_NOTPRESENT)) |
| 836 | return -EBUSY; |
| 837 | if (strncmp(buf, "off", 3) == 0) |
| 838 | rport->fast_io_fail_tmo = -1; |
| 839 | else { |
| 840 | val = simple_strtoul(buf, &cp, 0); |
| 841 | if ((*cp && (*cp != '\n')) || |
| 842 | (val < 0) || (val >= rport->dev_loss_tmo)) |
| 843 | return -EINVAL; |
| 844 | rport->fast_io_fail_tmo = val; |
| 845 | } |
| 846 | return count; |
| 847 | } |
| 848 | static FC_CLASS_DEVICE_ATTR(rport, fast_io_fail_tmo, S_IRUGO | S_IWUSR, |
| 849 | show_fc_rport_fast_io_fail_tmo, store_fc_rport_fast_io_fail_tmo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 850 | |
| 851 | |
| 852 | /* |
| 853 | * FC SCSI Target Attribute Management |
| 854 | */ |
| 855 | |
| 856 | /* |
| 857 | * Note: in the target show function we recognize when the remote |
Uwe Kleine-König | 1b3c371 | 2007-02-17 19:23:03 +0100 | [diff] [blame] | 858 | * port is in the hierarchy and do not allow the driver to get |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 859 | * involved in sysfs functions. The driver only gets involved if |
| 860 | * it's the "old" style that doesn't use rports. |
| 861 | */ |
| 862 | #define fc_starget_show_function(field, format_string, sz, cast) \ |
| 863 | static ssize_t \ |
| 864 | show_fc_starget_##field (struct class_device *cdev, char *buf) \ |
| 865 | { \ |
| 866 | struct scsi_target *starget = transport_class_to_starget(cdev); \ |
| 867 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \ |
| 868 | struct fc_internal *i = to_fc_internal(shost->transportt); \ |
| 869 | struct fc_rport *rport = starget_to_rport(starget); \ |
| 870 | if (rport) \ |
| 871 | fc_starget_##field(starget) = rport->field; \ |
| 872 | else if (i->f->get_starget_##field) \ |
| 873 | i->f->get_starget_##field(starget); \ |
| 874 | return snprintf(buf, sz, format_string, \ |
| 875 | cast fc_starget_##field(starget)); \ |
| 876 | } |
| 877 | |
| 878 | #define fc_starget_rd_attr(field, format_string, sz) \ |
| 879 | fc_starget_show_function(field, format_string, sz, ) \ |
| 880 | static FC_CLASS_DEVICE_ATTR(starget, field, S_IRUGO, \ |
| 881 | show_fc_starget_##field, NULL) |
| 882 | |
| 883 | #define fc_starget_rd_attr_cast(field, format_string, sz, cast) \ |
| 884 | fc_starget_show_function(field, format_string, sz, (cast)) \ |
| 885 | static FC_CLASS_DEVICE_ATTR(starget, field, S_IRUGO, \ |
| 886 | show_fc_starget_##field, NULL) |
| 887 | |
| 888 | #define SETUP_STARGET_ATTRIBUTE_RD(field) \ |
| 889 | i->private_starget_attrs[count] = class_device_attr_starget_##field; \ |
| 890 | i->private_starget_attrs[count].attr.mode = S_IRUGO; \ |
| 891 | i->private_starget_attrs[count].store = NULL; \ |
| 892 | i->starget_attrs[count] = &i->private_starget_attrs[count]; \ |
| 893 | if (i->f->show_starget_##field) \ |
| 894 | count++ |
| 895 | |
| 896 | #define SETUP_STARGET_ATTRIBUTE_RW(field) \ |
| 897 | i->private_starget_attrs[count] = class_device_attr_starget_##field; \ |
| 898 | if (!i->f->set_starget_##field) { \ |
| 899 | i->private_starget_attrs[count].attr.mode = S_IRUGO; \ |
| 900 | i->private_starget_attrs[count].store = NULL; \ |
| 901 | } \ |
| 902 | i->starget_attrs[count] = &i->private_starget_attrs[count]; \ |
| 903 | if (i->f->show_starget_##field) \ |
| 904 | count++ |
| 905 | |
| 906 | /* The FC Transport SCSI Target Attributes: */ |
| 907 | fc_starget_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); |
| 908 | fc_starget_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); |
| 909 | fc_starget_rd_attr(port_id, "0x%06x\n", 20); |
| 910 | |
| 911 | |
| 912 | /* |
| 913 | * Host Attribute Management |
| 914 | */ |
| 915 | |
| 916 | #define fc_host_show_function(field, format_string, sz, cast) \ |
| 917 | static ssize_t \ |
| 918 | show_fc_host_##field (struct class_device *cdev, char *buf) \ |
| 919 | { \ |
| 920 | struct Scsi_Host *shost = transport_class_to_shost(cdev); \ |
| 921 | struct fc_internal *i = to_fc_internal(shost->transportt); \ |
| 922 | if (i->f->get_host_##field) \ |
| 923 | i->f->get_host_##field(shost); \ |
| 924 | return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \ |
| 925 | } |
| 926 | |
| 927 | #define fc_host_store_function(field) \ |
| 928 | static ssize_t \ |
| 929 | store_fc_host_##field(struct class_device *cdev, const char *buf, \ |
| 930 | size_t count) \ |
| 931 | { \ |
| 932 | int val; \ |
| 933 | struct Scsi_Host *shost = transport_class_to_shost(cdev); \ |
| 934 | struct fc_internal *i = to_fc_internal(shost->transportt); \ |
James Smart | 0f29b96 | 2006-08-18 17:33:29 -0400 | [diff] [blame] | 935 | char *cp; \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 936 | \ |
James Smart | 0f29b96 | 2006-08-18 17:33:29 -0400 | [diff] [blame] | 937 | val = simple_strtoul(buf, &cp, 0); \ |
| 938 | if (*cp && (*cp != '\n')) \ |
| 939 | return -EINVAL; \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 940 | i->f->set_host_##field(shost, val); \ |
| 941 | return count; \ |
| 942 | } |
| 943 | |
James Smart | b8d0821 | 2006-08-17 08:00:43 -0400 | [diff] [blame] | 944 | #define fc_host_store_str_function(field, slen) \ |
| 945 | static ssize_t \ |
| 946 | store_fc_host_##field(struct class_device *cdev, const char *buf, \ |
| 947 | size_t count) \ |
| 948 | { \ |
| 949 | struct Scsi_Host *shost = transport_class_to_shost(cdev); \ |
| 950 | struct fc_internal *i = to_fc_internal(shost->transportt); \ |
| 951 | unsigned int cnt=count; \ |
| 952 | \ |
| 953 | /* count may include a LF at end of string */ \ |
| 954 | if (buf[cnt-1] == '\n') \ |
| 955 | cnt--; \ |
| 956 | if (cnt > ((slen) - 1)) \ |
| 957 | return -EINVAL; \ |
| 958 | memcpy(fc_host_##field(shost), buf, cnt); \ |
| 959 | i->f->set_host_##field(shost); \ |
| 960 | return count; \ |
| 961 | } |
| 962 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 963 | #define fc_host_rd_attr(field, format_string, sz) \ |
| 964 | fc_host_show_function(field, format_string, sz, ) \ |
| 965 | static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO, \ |
| 966 | show_fc_host_##field, NULL) |
| 967 | |
| 968 | #define fc_host_rd_attr_cast(field, format_string, sz, cast) \ |
| 969 | fc_host_show_function(field, format_string, sz, (cast)) \ |
| 970 | static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO, \ |
| 971 | show_fc_host_##field, NULL) |
| 972 | |
| 973 | #define fc_host_rw_attr(field, format_string, sz) \ |
| 974 | fc_host_show_function(field, format_string, sz, ) \ |
| 975 | fc_host_store_function(field) \ |
| 976 | static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR, \ |
| 977 | show_fc_host_##field, \ |
| 978 | store_fc_host_##field) |
| 979 | |
| 980 | #define fc_host_rd_enum_attr(title, maxlen) \ |
| 981 | static ssize_t \ |
| 982 | show_fc_host_##title (struct class_device *cdev, char *buf) \ |
| 983 | { \ |
| 984 | struct Scsi_Host *shost = transport_class_to_shost(cdev); \ |
| 985 | struct fc_internal *i = to_fc_internal(shost->transportt); \ |
| 986 | const char *name; \ |
| 987 | if (i->f->get_host_##title) \ |
| 988 | i->f->get_host_##title(shost); \ |
| 989 | name = get_fc_##title##_name(fc_host_##title(shost)); \ |
| 990 | if (!name) \ |
| 991 | return -EINVAL; \ |
| 992 | return snprintf(buf, maxlen, "%s\n", name); \ |
| 993 | } \ |
| 994 | static FC_CLASS_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL) |
| 995 | |
| 996 | #define SETUP_HOST_ATTRIBUTE_RD(field) \ |
| 997 | i->private_host_attrs[count] = class_device_attr_host_##field; \ |
| 998 | i->private_host_attrs[count].attr.mode = S_IRUGO; \ |
| 999 | i->private_host_attrs[count].store = NULL; \ |
| 1000 | i->host_attrs[count] = &i->private_host_attrs[count]; \ |
| 1001 | if (i->f->show_host_##field) \ |
| 1002 | count++ |
| 1003 | |
| 1004 | #define SETUP_HOST_ATTRIBUTE_RW(field) \ |
| 1005 | i->private_host_attrs[count] = class_device_attr_host_##field; \ |
| 1006 | if (!i->f->set_host_##field) { \ |
| 1007 | i->private_host_attrs[count].attr.mode = S_IRUGO; \ |
| 1008 | i->private_host_attrs[count].store = NULL; \ |
| 1009 | } \ |
| 1010 | i->host_attrs[count] = &i->private_host_attrs[count]; \ |
| 1011 | if (i->f->show_host_##field) \ |
| 1012 | count++ |
| 1013 | |
| 1014 | |
| 1015 | #define fc_private_host_show_function(field, format_string, sz, cast) \ |
| 1016 | static ssize_t \ |
| 1017 | show_fc_host_##field (struct class_device *cdev, char *buf) \ |
| 1018 | { \ |
| 1019 | struct Scsi_Host *shost = transport_class_to_shost(cdev); \ |
| 1020 | return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \ |
| 1021 | } |
| 1022 | |
| 1023 | #define fc_private_host_rd_attr(field, format_string, sz) \ |
| 1024 | fc_private_host_show_function(field, format_string, sz, ) \ |
| 1025 | static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO, \ |
| 1026 | show_fc_host_##field, NULL) |
| 1027 | |
| 1028 | #define fc_private_host_rd_attr_cast(field, format_string, sz, cast) \ |
| 1029 | fc_private_host_show_function(field, format_string, sz, (cast)) \ |
| 1030 | static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO, \ |
| 1031 | show_fc_host_##field, NULL) |
| 1032 | |
| 1033 | #define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field) \ |
| 1034 | i->private_host_attrs[count] = class_device_attr_host_##field; \ |
| 1035 | i->private_host_attrs[count].attr.mode = S_IRUGO; \ |
| 1036 | i->private_host_attrs[count].store = NULL; \ |
| 1037 | i->host_attrs[count] = &i->private_host_attrs[count]; \ |
| 1038 | count++ |
| 1039 | |
| 1040 | #define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field) \ |
Andrew Vasquez | 91ca7b0 | 2005-10-27 16:03:37 -0700 | [diff] [blame] | 1041 | { \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1042 | i->private_host_attrs[count] = class_device_attr_host_##field; \ |
| 1043 | i->host_attrs[count] = &i->private_host_attrs[count]; \ |
Andrew Vasquez | 91ca7b0 | 2005-10-27 16:03:37 -0700 | [diff] [blame] | 1044 | count++; \ |
| 1045 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1046 | |
| 1047 | |
| 1048 | /* Fixed Host Attributes */ |
| 1049 | |
| 1050 | static ssize_t |
| 1051 | show_fc_host_supported_classes (struct class_device *cdev, char *buf) |
| 1052 | { |
| 1053 | struct Scsi_Host *shost = transport_class_to_shost(cdev); |
| 1054 | |
| 1055 | if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED) |
| 1056 | return snprintf(buf, 20, "unspecified\n"); |
| 1057 | |
| 1058 | return get_fc_cos_names(fc_host_supported_classes(shost), buf); |
| 1059 | } |
| 1060 | static FC_CLASS_DEVICE_ATTR(host, supported_classes, S_IRUGO, |
| 1061 | show_fc_host_supported_classes, NULL); |
| 1062 | |
| 1063 | static ssize_t |
| 1064 | show_fc_host_supported_fc4s (struct class_device *cdev, char *buf) |
| 1065 | { |
| 1066 | struct Scsi_Host *shost = transport_class_to_shost(cdev); |
| 1067 | return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost)); |
| 1068 | } |
| 1069 | static FC_CLASS_DEVICE_ATTR(host, supported_fc4s, S_IRUGO, |
| 1070 | show_fc_host_supported_fc4s, NULL); |
| 1071 | |
| 1072 | static ssize_t |
| 1073 | show_fc_host_supported_speeds (struct class_device *cdev, char *buf) |
| 1074 | { |
| 1075 | struct Scsi_Host *shost = transport_class_to_shost(cdev); |
| 1076 | |
| 1077 | if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN) |
| 1078 | return snprintf(buf, 20, "unknown\n"); |
| 1079 | |
| 1080 | return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf); |
| 1081 | } |
| 1082 | static FC_CLASS_DEVICE_ATTR(host, supported_speeds, S_IRUGO, |
| 1083 | show_fc_host_supported_speeds, NULL); |
| 1084 | |
| 1085 | |
| 1086 | fc_private_host_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); |
| 1087 | fc_private_host_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); |
Andreas Herrmann | 6b7281d | 2006-01-13 02:16:54 +0100 | [diff] [blame] | 1088 | fc_private_host_rd_attr_cast(permanent_port_name, "0x%llx\n", 20, |
| 1089 | unsigned long long); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1090 | fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20); |
| 1091 | fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1)); |
| 1092 | |
| 1093 | |
| 1094 | /* Dynamic Host Attributes */ |
| 1095 | |
| 1096 | static ssize_t |
| 1097 | show_fc_host_active_fc4s (struct class_device *cdev, char *buf) |
| 1098 | { |
| 1099 | struct Scsi_Host *shost = transport_class_to_shost(cdev); |
| 1100 | struct fc_internal *i = to_fc_internal(shost->transportt); |
| 1101 | |
| 1102 | if (i->f->get_host_active_fc4s) |
| 1103 | i->f->get_host_active_fc4s(shost); |
| 1104 | |
| 1105 | return (ssize_t)show_fc_fc4s(buf, fc_host_active_fc4s(shost)); |
| 1106 | } |
| 1107 | static FC_CLASS_DEVICE_ATTR(host, active_fc4s, S_IRUGO, |
| 1108 | show_fc_host_active_fc4s, NULL); |
| 1109 | |
| 1110 | static ssize_t |
| 1111 | show_fc_host_speed (struct class_device *cdev, char *buf) |
| 1112 | { |
| 1113 | struct Scsi_Host *shost = transport_class_to_shost(cdev); |
| 1114 | struct fc_internal *i = to_fc_internal(shost->transportt); |
| 1115 | |
| 1116 | if (i->f->get_host_speed) |
| 1117 | i->f->get_host_speed(shost); |
| 1118 | |
| 1119 | if (fc_host_speed(shost) == FC_PORTSPEED_UNKNOWN) |
| 1120 | return snprintf(buf, 20, "unknown\n"); |
| 1121 | |
| 1122 | return get_fc_port_speed_names(fc_host_speed(shost), buf); |
| 1123 | } |
| 1124 | static FC_CLASS_DEVICE_ATTR(host, speed, S_IRUGO, |
| 1125 | show_fc_host_speed, NULL); |
| 1126 | |
| 1127 | |
| 1128 | fc_host_rd_attr(port_id, "0x%06x\n", 20); |
| 1129 | fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN); |
| 1130 | fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN); |
| 1131 | fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long); |
James Smart | 016131b | 2006-08-14 08:20:25 -0400 | [diff] [blame] | 1132 | fc_host_rd_attr(symbolic_name, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1133 | |
James Smart | b8d0821 | 2006-08-17 08:00:43 -0400 | [diff] [blame] | 1134 | fc_private_host_show_function(system_hostname, "%s\n", |
| 1135 | FC_SYMBOLIC_NAME_SIZE + 1, ) |
| 1136 | fc_host_store_str_function(system_hostname, FC_SYMBOLIC_NAME_SIZE) |
| 1137 | static FC_CLASS_DEVICE_ATTR(host, system_hostname, S_IRUGO | S_IWUSR, |
| 1138 | show_fc_host_system_hostname, store_fc_host_system_hostname); |
| 1139 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1140 | |
| 1141 | /* Private Host Attributes */ |
| 1142 | |
| 1143 | static ssize_t |
| 1144 | show_fc_private_host_tgtid_bind_type(struct class_device *cdev, char *buf) |
| 1145 | { |
| 1146 | struct Scsi_Host *shost = transport_class_to_shost(cdev); |
| 1147 | const char *name; |
| 1148 | |
| 1149 | name = get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost)); |
| 1150 | if (!name) |
| 1151 | return -EINVAL; |
| 1152 | return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name); |
| 1153 | } |
| 1154 | |
James.Smart@Emulex.Com | d16794f6a | 2005-10-05 13:50:08 -0400 | [diff] [blame] | 1155 | #define get_list_head_entry(pos, head, member) \ |
| 1156 | pos = list_entry((head)->next, typeof(*pos), member) |
| 1157 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1158 | static ssize_t |
| 1159 | store_fc_private_host_tgtid_bind_type(struct class_device *cdev, |
| 1160 | const char *buf, size_t count) |
| 1161 | { |
| 1162 | struct Scsi_Host *shost = transport_class_to_shost(cdev); |
James.Smart@Emulex.Com | d16794f6a | 2005-10-05 13:50:08 -0400 | [diff] [blame] | 1163 | struct fc_rport *rport; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1164 | enum fc_tgtid_binding_type val; |
| 1165 | unsigned long flags; |
| 1166 | |
| 1167 | if (get_fc_tgtid_bind_type_match(buf, &val)) |
| 1168 | return -EINVAL; |
| 1169 | |
| 1170 | /* if changing bind type, purge all unused consistent bindings */ |
| 1171 | if (val != fc_host_tgtid_bind_type(shost)) { |
| 1172 | spin_lock_irqsave(shost->host_lock, flags); |
James.Smart@Emulex.Com | d16794f6a | 2005-10-05 13:50:08 -0400 | [diff] [blame] | 1173 | while (!list_empty(&fc_host_rport_bindings(shost))) { |
| 1174 | get_list_head_entry(rport, |
| 1175 | &fc_host_rport_bindings(shost), peers); |
James Smart | aedf349 | 2006-04-10 10:14:05 -0400 | [diff] [blame] | 1176 | list_del(&rport->peers); |
| 1177 | rport->port_state = FC_PORTSTATE_DELETED; |
| 1178 | fc_queue_work(shost, &rport->rport_delete_work); |
James.Smart@Emulex.Com | d16794f6a | 2005-10-05 13:50:08 -0400 | [diff] [blame] | 1179 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1180 | spin_unlock_irqrestore(shost->host_lock, flags); |
| 1181 | } |
| 1182 | |
| 1183 | fc_host_tgtid_bind_type(shost) = val; |
| 1184 | return count; |
| 1185 | } |
| 1186 | |
| 1187 | static FC_CLASS_DEVICE_ATTR(host, tgtid_bind_type, S_IRUGO | S_IWUSR, |
| 1188 | show_fc_private_host_tgtid_bind_type, |
| 1189 | store_fc_private_host_tgtid_bind_type); |
| 1190 | |
Andrew Vasquez | 91ca7b0 | 2005-10-27 16:03:37 -0700 | [diff] [blame] | 1191 | static ssize_t |
| 1192 | store_fc_private_host_issue_lip(struct class_device *cdev, |
| 1193 | const char *buf, size_t count) |
| 1194 | { |
| 1195 | struct Scsi_Host *shost = transport_class_to_shost(cdev); |
| 1196 | struct fc_internal *i = to_fc_internal(shost->transportt); |
| 1197 | int ret; |
| 1198 | |
| 1199 | /* ignore any data value written to the attribute */ |
| 1200 | if (i->f->issue_fc_host_lip) { |
| 1201 | ret = i->f->issue_fc_host_lip(shost); |
| 1202 | return ret ? ret: count; |
| 1203 | } |
| 1204 | |
| 1205 | return -ENOENT; |
| 1206 | } |
| 1207 | |
| 1208 | static FC_CLASS_DEVICE_ATTR(host, issue_lip, S_IWUSR, NULL, |
| 1209 | store_fc_private_host_issue_lip); |
| 1210 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1211 | /* |
| 1212 | * Host Statistics Management |
| 1213 | */ |
| 1214 | |
| 1215 | /* Show a given an attribute in the statistics group */ |
| 1216 | static ssize_t |
| 1217 | fc_stat_show(const struct class_device *cdev, char *buf, unsigned long offset) |
| 1218 | { |
| 1219 | struct Scsi_Host *shost = transport_class_to_shost(cdev); |
| 1220 | struct fc_internal *i = to_fc_internal(shost->transportt); |
| 1221 | struct fc_host_statistics *stats; |
| 1222 | ssize_t ret = -ENOENT; |
| 1223 | |
| 1224 | if (offset > sizeof(struct fc_host_statistics) || |
| 1225 | offset % sizeof(u64) != 0) |
| 1226 | WARN_ON(1); |
| 1227 | |
| 1228 | if (i->f->get_fc_host_stats) { |
| 1229 | stats = (i->f->get_fc_host_stats)(shost); |
| 1230 | if (stats) |
| 1231 | ret = snprintf(buf, 20, "0x%llx\n", |
| 1232 | (unsigned long long)*(u64 *)(((u8 *) stats) + offset)); |
| 1233 | } |
| 1234 | return ret; |
| 1235 | } |
| 1236 | |
| 1237 | |
| 1238 | /* generate a read-only statistics attribute */ |
| 1239 | #define fc_host_statistic(name) \ |
| 1240 | static ssize_t show_fcstat_##name(struct class_device *cd, char *buf) \ |
| 1241 | { \ |
| 1242 | return fc_stat_show(cd, buf, \ |
| 1243 | offsetof(struct fc_host_statistics, name)); \ |
| 1244 | } \ |
| 1245 | static FC_CLASS_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL) |
| 1246 | |
| 1247 | fc_host_statistic(seconds_since_last_reset); |
| 1248 | fc_host_statistic(tx_frames); |
| 1249 | fc_host_statistic(tx_words); |
| 1250 | fc_host_statistic(rx_frames); |
| 1251 | fc_host_statistic(rx_words); |
| 1252 | fc_host_statistic(lip_count); |
| 1253 | fc_host_statistic(nos_count); |
| 1254 | fc_host_statistic(error_frames); |
| 1255 | fc_host_statistic(dumped_frames); |
| 1256 | fc_host_statistic(link_failure_count); |
| 1257 | fc_host_statistic(loss_of_sync_count); |
| 1258 | fc_host_statistic(loss_of_signal_count); |
| 1259 | fc_host_statistic(prim_seq_protocol_err_count); |
| 1260 | fc_host_statistic(invalid_tx_word_count); |
| 1261 | fc_host_statistic(invalid_crc_count); |
| 1262 | fc_host_statistic(fcp_input_requests); |
| 1263 | fc_host_statistic(fcp_output_requests); |
| 1264 | fc_host_statistic(fcp_control_requests); |
| 1265 | fc_host_statistic(fcp_input_megabytes); |
| 1266 | fc_host_statistic(fcp_output_megabytes); |
| 1267 | |
| 1268 | static ssize_t |
| 1269 | fc_reset_statistics(struct class_device *cdev, const char *buf, |
| 1270 | size_t count) |
| 1271 | { |
| 1272 | struct Scsi_Host *shost = transport_class_to_shost(cdev); |
| 1273 | struct fc_internal *i = to_fc_internal(shost->transportt); |
| 1274 | |
| 1275 | /* ignore any data value written to the attribute */ |
| 1276 | if (i->f->reset_fc_host_stats) { |
| 1277 | i->f->reset_fc_host_stats(shost); |
| 1278 | return count; |
| 1279 | } |
| 1280 | |
| 1281 | return -ENOENT; |
| 1282 | } |
| 1283 | static FC_CLASS_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL, |
| 1284 | fc_reset_statistics); |
| 1285 | |
| 1286 | |
| 1287 | static struct attribute *fc_statistics_attrs[] = { |
| 1288 | &class_device_attr_host_seconds_since_last_reset.attr, |
| 1289 | &class_device_attr_host_tx_frames.attr, |
| 1290 | &class_device_attr_host_tx_words.attr, |
| 1291 | &class_device_attr_host_rx_frames.attr, |
| 1292 | &class_device_attr_host_rx_words.attr, |
| 1293 | &class_device_attr_host_lip_count.attr, |
| 1294 | &class_device_attr_host_nos_count.attr, |
| 1295 | &class_device_attr_host_error_frames.attr, |
| 1296 | &class_device_attr_host_dumped_frames.attr, |
| 1297 | &class_device_attr_host_link_failure_count.attr, |
| 1298 | &class_device_attr_host_loss_of_sync_count.attr, |
| 1299 | &class_device_attr_host_loss_of_signal_count.attr, |
| 1300 | &class_device_attr_host_prim_seq_protocol_err_count.attr, |
| 1301 | &class_device_attr_host_invalid_tx_word_count.attr, |
| 1302 | &class_device_attr_host_invalid_crc_count.attr, |
| 1303 | &class_device_attr_host_fcp_input_requests.attr, |
| 1304 | &class_device_attr_host_fcp_output_requests.attr, |
| 1305 | &class_device_attr_host_fcp_control_requests.attr, |
| 1306 | &class_device_attr_host_fcp_input_megabytes.attr, |
| 1307 | &class_device_attr_host_fcp_output_megabytes.attr, |
| 1308 | &class_device_attr_host_reset_statistics.attr, |
| 1309 | NULL |
| 1310 | }; |
| 1311 | |
| 1312 | static struct attribute_group fc_statistics_group = { |
| 1313 | .name = "statistics", |
| 1314 | .attrs = fc_statistics_attrs, |
| 1315 | }; |
| 1316 | |
| 1317 | static int fc_host_match(struct attribute_container *cont, |
| 1318 | struct device *dev) |
| 1319 | { |
| 1320 | struct Scsi_Host *shost; |
| 1321 | struct fc_internal *i; |
| 1322 | |
| 1323 | if (!scsi_is_host_device(dev)) |
| 1324 | return 0; |
| 1325 | |
| 1326 | shost = dev_to_shost(dev); |
| 1327 | if (!shost->transportt || shost->transportt->host_attrs.ac.class |
| 1328 | != &fc_host_class.class) |
| 1329 | return 0; |
| 1330 | |
| 1331 | i = to_fc_internal(shost->transportt); |
| 1332 | |
| 1333 | return &i->t.host_attrs.ac == cont; |
| 1334 | } |
| 1335 | |
| 1336 | static int fc_target_match(struct attribute_container *cont, |
| 1337 | struct device *dev) |
| 1338 | { |
| 1339 | struct Scsi_Host *shost; |
| 1340 | struct fc_internal *i; |
| 1341 | |
| 1342 | if (!scsi_is_target_device(dev)) |
| 1343 | return 0; |
| 1344 | |
| 1345 | shost = dev_to_shost(dev->parent); |
| 1346 | if (!shost->transportt || shost->transportt->host_attrs.ac.class |
| 1347 | != &fc_host_class.class) |
| 1348 | return 0; |
| 1349 | |
| 1350 | i = to_fc_internal(shost->transportt); |
| 1351 | |
| 1352 | return &i->t.target_attrs.ac == cont; |
| 1353 | } |
| 1354 | |
| 1355 | static void fc_rport_dev_release(struct device *dev) |
| 1356 | { |
| 1357 | struct fc_rport *rport = dev_to_rport(dev); |
| 1358 | put_device(dev->parent); |
| 1359 | kfree(rport); |
| 1360 | } |
| 1361 | |
| 1362 | int scsi_is_fc_rport(const struct device *dev) |
| 1363 | { |
| 1364 | return dev->release == fc_rport_dev_release; |
| 1365 | } |
| 1366 | EXPORT_SYMBOL(scsi_is_fc_rport); |
| 1367 | |
| 1368 | static int fc_rport_match(struct attribute_container *cont, |
| 1369 | struct device *dev) |
| 1370 | { |
| 1371 | struct Scsi_Host *shost; |
| 1372 | struct fc_internal *i; |
| 1373 | |
| 1374 | if (!scsi_is_fc_rport(dev)) |
| 1375 | return 0; |
| 1376 | |
| 1377 | shost = dev_to_shost(dev->parent); |
| 1378 | if (!shost->transportt || shost->transportt->host_attrs.ac.class |
| 1379 | != &fc_host_class.class) |
| 1380 | return 0; |
| 1381 | |
| 1382 | i = to_fc_internal(shost->transportt); |
| 1383 | |
| 1384 | return &i->rport_attr_cont.ac == cont; |
| 1385 | } |
| 1386 | |
James.Smart@Emulex.Com | 5c44cd2 | 2005-06-10 22:24:30 -0400 | [diff] [blame] | 1387 | |
James Smart | c829c39 | 2006-03-13 08:28:57 -0500 | [diff] [blame] | 1388 | /** |
| 1389 | * fc_timed_out - FC Transport I/O timeout intercept handler |
| 1390 | * |
| 1391 | * @scmd: The SCSI command which timed out |
| 1392 | * |
| 1393 | * This routine protects against error handlers getting invoked while a |
| 1394 | * rport is in a blocked state, typically due to a temporarily loss of |
| 1395 | * connectivity. If the error handlers are allowed to proceed, requests |
| 1396 | * to abort i/o, reset the target, etc will likely fail as there is no way |
| 1397 | * to communicate with the device to perform the requested function. These |
| 1398 | * failures may result in the midlayer taking the device offline, requiring |
| 1399 | * manual intervention to restore operation. |
| 1400 | * |
| 1401 | * This routine, called whenever an i/o times out, validates the state of |
| 1402 | * the underlying rport. If the rport is blocked, it returns |
| 1403 | * EH_RESET_TIMER, which will continue to reschedule the timeout. |
| 1404 | * Eventually, either the device will return, or devloss_tmo will fire, |
| 1405 | * and when the timeout then fires, it will be handled normally. |
| 1406 | * If the rport is not blocked, normal error handling continues. |
| 1407 | * |
| 1408 | * Notes: |
| 1409 | * This routine assumes no locks are held on entry. |
| 1410 | **/ |
| 1411 | static enum scsi_eh_timer_return |
| 1412 | fc_timed_out(struct scsi_cmnd *scmd) |
| 1413 | { |
| 1414 | struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device)); |
| 1415 | |
| 1416 | if (rport->port_state == FC_PORTSTATE_BLOCKED) |
| 1417 | return EH_RESET_TIMER; |
| 1418 | |
| 1419 | return EH_NOT_HANDLED; |
| 1420 | } |
| 1421 | |
James.Smart@Emulex.Com | 5c44cd2 | 2005-06-10 22:24:30 -0400 | [diff] [blame] | 1422 | /* |
| 1423 | * Must be called with shost->host_lock held |
| 1424 | */ |
Christoph Hellwig | e02f3f5 | 2006-01-13 19:04:00 +0100 | [diff] [blame] | 1425 | static int fc_user_scan(struct Scsi_Host *shost, uint channel, |
| 1426 | uint id, uint lun) |
James.Smart@Emulex.Com | 5c44cd2 | 2005-06-10 22:24:30 -0400 | [diff] [blame] | 1427 | { |
| 1428 | struct fc_rport *rport; |
| 1429 | |
Christoph Hellwig | e02f3f5 | 2006-01-13 19:04:00 +0100 | [diff] [blame] | 1430 | list_for_each_entry(rport, &fc_host_rports(shost), peers) { |
| 1431 | if (rport->scsi_target_id == -1) |
| 1432 | continue; |
James.Smart@Emulex.Com | 5c44cd2 | 2005-06-10 22:24:30 -0400 | [diff] [blame] | 1433 | |
Christoph Hellwig | e02f3f5 | 2006-01-13 19:04:00 +0100 | [diff] [blame] | 1434 | if ((channel == SCAN_WILD_CARD || channel == rport->channel) && |
| 1435 | (id == SCAN_WILD_CARD || id == rport->scsi_target_id)) { |
| 1436 | scsi_scan_target(&rport->dev, rport->channel, |
| 1437 | rport->scsi_target_id, lun, 1); |
| 1438 | } |
| 1439 | } |
| 1440 | |
| 1441 | return 0; |
James.Smart@Emulex.Com | 5c44cd2 | 2005-06-10 22:24:30 -0400 | [diff] [blame] | 1442 | } |
| 1443 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1444 | struct scsi_transport_template * |
| 1445 | fc_attach_transport(struct fc_function_template *ft) |
| 1446 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1447 | int count; |
Jes Sorensen | 24669f75 | 2006-01-16 10:31:18 -0500 | [diff] [blame] | 1448 | struct fc_internal *i = kzalloc(sizeof(struct fc_internal), |
| 1449 | GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1450 | |
| 1451 | if (unlikely(!i)) |
| 1452 | return NULL; |
| 1453 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1454 | i->t.target_attrs.ac.attrs = &i->starget_attrs[0]; |
| 1455 | i->t.target_attrs.ac.class = &fc_transport_class.class; |
| 1456 | i->t.target_attrs.ac.match = fc_target_match; |
| 1457 | i->t.target_size = sizeof(struct fc_starget_attrs); |
| 1458 | transport_container_register(&i->t.target_attrs); |
| 1459 | |
| 1460 | i->t.host_attrs.ac.attrs = &i->host_attrs[0]; |
| 1461 | i->t.host_attrs.ac.class = &fc_host_class.class; |
| 1462 | i->t.host_attrs.ac.match = fc_host_match; |
| 1463 | i->t.host_size = sizeof(struct fc_host_attrs); |
| 1464 | if (ft->get_fc_host_stats) |
| 1465 | i->t.host_attrs.statistics = &fc_statistics_group; |
| 1466 | transport_container_register(&i->t.host_attrs); |
| 1467 | |
| 1468 | i->rport_attr_cont.ac.attrs = &i->rport_attrs[0]; |
| 1469 | i->rport_attr_cont.ac.class = &fc_rport_class.class; |
| 1470 | i->rport_attr_cont.ac.match = fc_rport_match; |
| 1471 | transport_container_register(&i->rport_attr_cont); |
| 1472 | |
| 1473 | i->f = ft; |
| 1474 | |
| 1475 | /* Transport uses the shost workq for scsi scanning */ |
| 1476 | i->t.create_work_queue = 1; |
James.Smart@Emulex.Com | 5c44cd2 | 2005-06-10 22:24:30 -0400 | [diff] [blame] | 1477 | |
James Smart | c829c39 | 2006-03-13 08:28:57 -0500 | [diff] [blame] | 1478 | i->t.eh_timed_out = fc_timed_out; |
| 1479 | |
Christoph Hellwig | e02f3f5 | 2006-01-13 19:04:00 +0100 | [diff] [blame] | 1480 | i->t.user_scan = fc_user_scan; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1481 | |
| 1482 | /* |
| 1483 | * Setup SCSI Target Attributes. |
| 1484 | */ |
| 1485 | count = 0; |
| 1486 | SETUP_STARGET_ATTRIBUTE_RD(node_name); |
| 1487 | SETUP_STARGET_ATTRIBUTE_RD(port_name); |
| 1488 | SETUP_STARGET_ATTRIBUTE_RD(port_id); |
| 1489 | |
| 1490 | BUG_ON(count > FC_STARGET_NUM_ATTRS); |
| 1491 | |
| 1492 | i->starget_attrs[count] = NULL; |
| 1493 | |
| 1494 | |
| 1495 | /* |
| 1496 | * Setup SCSI Host Attributes. |
| 1497 | */ |
| 1498 | count=0; |
| 1499 | SETUP_HOST_ATTRIBUTE_RD(node_name); |
| 1500 | SETUP_HOST_ATTRIBUTE_RD(port_name); |
Andreas Herrmann | 6b7281d | 2006-01-13 02:16:54 +0100 | [diff] [blame] | 1501 | SETUP_HOST_ATTRIBUTE_RD(permanent_port_name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1502 | SETUP_HOST_ATTRIBUTE_RD(supported_classes); |
| 1503 | SETUP_HOST_ATTRIBUTE_RD(supported_fc4s); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1504 | SETUP_HOST_ATTRIBUTE_RD(supported_speeds); |
| 1505 | SETUP_HOST_ATTRIBUTE_RD(maxframe_size); |
| 1506 | SETUP_HOST_ATTRIBUTE_RD(serial_number); |
| 1507 | |
| 1508 | SETUP_HOST_ATTRIBUTE_RD(port_id); |
| 1509 | SETUP_HOST_ATTRIBUTE_RD(port_type); |
| 1510 | SETUP_HOST_ATTRIBUTE_RD(port_state); |
| 1511 | SETUP_HOST_ATTRIBUTE_RD(active_fc4s); |
| 1512 | SETUP_HOST_ATTRIBUTE_RD(speed); |
| 1513 | SETUP_HOST_ATTRIBUTE_RD(fabric_name); |
James Smart | 016131b | 2006-08-14 08:20:25 -0400 | [diff] [blame] | 1514 | SETUP_HOST_ATTRIBUTE_RD(symbolic_name); |
James Smart | b8d0821 | 2006-08-17 08:00:43 -0400 | [diff] [blame] | 1515 | SETUP_HOST_ATTRIBUTE_RW(system_hostname); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1516 | |
| 1517 | /* Transport-managed attributes */ |
| 1518 | SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type); |
Andrew Vasquez | 91ca7b0 | 2005-10-27 16:03:37 -0700 | [diff] [blame] | 1519 | if (ft->issue_fc_host_lip) |
| 1520 | SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1521 | |
| 1522 | BUG_ON(count > FC_HOST_NUM_ATTRS); |
| 1523 | |
| 1524 | i->host_attrs[count] = NULL; |
| 1525 | |
| 1526 | /* |
| 1527 | * Setup Remote Port Attributes. |
| 1528 | */ |
| 1529 | count=0; |
| 1530 | SETUP_RPORT_ATTRIBUTE_RD(maxframe_size); |
| 1531 | SETUP_RPORT_ATTRIBUTE_RD(supported_classes); |
| 1532 | SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo); |
| 1533 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name); |
| 1534 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name); |
| 1535 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id); |
| 1536 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles); |
| 1537 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_state); |
| 1538 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id); |
James Smart | 0f29b96 | 2006-08-18 17:33:29 -0400 | [diff] [blame] | 1539 | if (ft->terminate_rport_io) |
| 1540 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(fast_io_fail_tmo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1541 | |
| 1542 | BUG_ON(count > FC_RPORT_NUM_ATTRS); |
| 1543 | |
| 1544 | i->rport_attrs[count] = NULL; |
| 1545 | |
| 1546 | return &i->t; |
| 1547 | } |
| 1548 | EXPORT_SYMBOL(fc_attach_transport); |
| 1549 | |
| 1550 | void fc_release_transport(struct scsi_transport_template *t) |
| 1551 | { |
| 1552 | struct fc_internal *i = to_fc_internal(t); |
| 1553 | |
| 1554 | transport_container_unregister(&i->t.target_attrs); |
| 1555 | transport_container_unregister(&i->t.host_attrs); |
| 1556 | transport_container_unregister(&i->rport_attr_cont); |
| 1557 | |
| 1558 | kfree(i); |
| 1559 | } |
| 1560 | EXPORT_SYMBOL(fc_release_transport); |
| 1561 | |
James Smart | aedf349 | 2006-04-10 10:14:05 -0400 | [diff] [blame] | 1562 | /** |
| 1563 | * fc_queue_work - Queue work to the fc_host workqueue. |
| 1564 | * @shost: Pointer to Scsi_Host bound to fc_host. |
| 1565 | * @work: Work to queue for execution. |
| 1566 | * |
| 1567 | * Return value: |
James Smart | a0785ed | 2006-05-11 13:27:09 -0400 | [diff] [blame] | 1568 | * 1 - work queued for execution |
| 1569 | * 0 - work is already queued |
| 1570 | * -EINVAL - work queue doesn't exist |
James Smart | aedf349 | 2006-04-10 10:14:05 -0400 | [diff] [blame] | 1571 | **/ |
| 1572 | static int |
| 1573 | fc_queue_work(struct Scsi_Host *shost, struct work_struct *work) |
| 1574 | { |
| 1575 | if (unlikely(!fc_host_work_q(shost))) { |
| 1576 | printk(KERN_ERR |
| 1577 | "ERROR: FC host '%s' attempted to queue work, " |
| 1578 | "when no workqueue created.\n", shost->hostt->name); |
| 1579 | dump_stack(); |
| 1580 | |
| 1581 | return -EINVAL; |
| 1582 | } |
| 1583 | |
| 1584 | return queue_work(fc_host_work_q(shost), work); |
| 1585 | } |
| 1586 | |
| 1587 | /** |
| 1588 | * fc_flush_work - Flush a fc_host's workqueue. |
| 1589 | * @shost: Pointer to Scsi_Host bound to fc_host. |
| 1590 | **/ |
| 1591 | static void |
| 1592 | fc_flush_work(struct Scsi_Host *shost) |
| 1593 | { |
| 1594 | if (!fc_host_work_q(shost)) { |
| 1595 | printk(KERN_ERR |
| 1596 | "ERROR: FC host '%s' attempted to flush work, " |
| 1597 | "when no workqueue created.\n", shost->hostt->name); |
| 1598 | dump_stack(); |
| 1599 | return; |
| 1600 | } |
| 1601 | |
| 1602 | flush_workqueue(fc_host_work_q(shost)); |
| 1603 | } |
| 1604 | |
| 1605 | /** |
| 1606 | * fc_queue_devloss_work - Schedule work for the fc_host devloss workqueue. |
| 1607 | * @shost: Pointer to Scsi_Host bound to fc_host. |
| 1608 | * @work: Work to queue for execution. |
| 1609 | * @delay: jiffies to delay the work queuing |
| 1610 | * |
| 1611 | * Return value: |
James Smart | 0f29b96 | 2006-08-18 17:33:29 -0400 | [diff] [blame] | 1612 | * 1 on success / 0 already queued / < 0 for error |
James Smart | aedf349 | 2006-04-10 10:14:05 -0400 | [diff] [blame] | 1613 | **/ |
| 1614 | static int |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 1615 | fc_queue_devloss_work(struct Scsi_Host *shost, struct delayed_work *work, |
James Smart | aedf349 | 2006-04-10 10:14:05 -0400 | [diff] [blame] | 1616 | unsigned long delay) |
| 1617 | { |
| 1618 | if (unlikely(!fc_host_devloss_work_q(shost))) { |
| 1619 | printk(KERN_ERR |
| 1620 | "ERROR: FC host '%s' attempted to queue work, " |
| 1621 | "when no workqueue created.\n", shost->hostt->name); |
| 1622 | dump_stack(); |
| 1623 | |
| 1624 | return -EINVAL; |
| 1625 | } |
| 1626 | |
| 1627 | return queue_delayed_work(fc_host_devloss_work_q(shost), work, delay); |
| 1628 | } |
| 1629 | |
| 1630 | /** |
| 1631 | * fc_flush_devloss - Flush a fc_host's devloss workqueue. |
| 1632 | * @shost: Pointer to Scsi_Host bound to fc_host. |
| 1633 | **/ |
| 1634 | static void |
| 1635 | fc_flush_devloss(struct Scsi_Host *shost) |
| 1636 | { |
| 1637 | if (!fc_host_devloss_work_q(shost)) { |
| 1638 | printk(KERN_ERR |
| 1639 | "ERROR: FC host '%s' attempted to flush work, " |
| 1640 | "when no workqueue created.\n", shost->hostt->name); |
| 1641 | dump_stack(); |
| 1642 | return; |
| 1643 | } |
| 1644 | |
| 1645 | flush_workqueue(fc_host_devloss_work_q(shost)); |
| 1646 | } |
| 1647 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1648 | |
| 1649 | /** |
| 1650 | * fc_remove_host - called to terminate any fc_transport-related elements |
| 1651 | * for a scsi host. |
| 1652 | * @rport: remote port to be unblocked. |
| 1653 | * |
| 1654 | * This routine is expected to be called immediately preceeding the |
| 1655 | * a driver's call to scsi_remove_host(). |
| 1656 | * |
| 1657 | * WARNING: A driver utilizing the fc_transport, which fails to call |
| 1658 | * this routine prior to scsi_remote_host(), will leave dangling |
| 1659 | * objects in /sys/class/fc_remote_ports. Access to any of these |
| 1660 | * objects can result in a system crash !!! |
| 1661 | * |
| 1662 | * Notes: |
| 1663 | * This routine assumes no locks are held on entry. |
| 1664 | **/ |
| 1665 | void |
| 1666 | fc_remove_host(struct Scsi_Host *shost) |
| 1667 | { |
| 1668 | struct fc_rport *rport, *next_rport; |
James Smart | aedf349 | 2006-04-10 10:14:05 -0400 | [diff] [blame] | 1669 | struct workqueue_struct *work_q; |
| 1670 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1671 | |
| 1672 | /* Remove any remote ports */ |
| 1673 | list_for_each_entry_safe(rport, next_rport, |
James Smart | aedf349 | 2006-04-10 10:14:05 -0400 | [diff] [blame] | 1674 | &fc_host->rports, peers) { |
| 1675 | list_del(&rport->peers); |
| 1676 | rport->port_state = FC_PORTSTATE_DELETED; |
| 1677 | fc_queue_work(shost, &rport->rport_delete_work); |
| 1678 | } |
| 1679 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1680 | list_for_each_entry_safe(rport, next_rport, |
James Smart | aedf349 | 2006-04-10 10:14:05 -0400 | [diff] [blame] | 1681 | &fc_host->rport_bindings, peers) { |
| 1682 | list_del(&rport->peers); |
| 1683 | rport->port_state = FC_PORTSTATE_DELETED; |
| 1684 | fc_queue_work(shost, &rport->rport_delete_work); |
| 1685 | } |
| 1686 | |
| 1687 | /* flush all scan work items */ |
| 1688 | scsi_flush_work(shost); |
| 1689 | |
| 1690 | /* flush all stgt delete, and rport delete work items, then kill it */ |
| 1691 | if (fc_host->work_q) { |
| 1692 | work_q = fc_host->work_q; |
| 1693 | fc_host->work_q = NULL; |
| 1694 | destroy_workqueue(work_q); |
| 1695 | } |
| 1696 | |
| 1697 | /* flush all devloss work items, then kill it */ |
| 1698 | if (fc_host->devloss_work_q) { |
| 1699 | work_q = fc_host->devloss_work_q; |
| 1700 | fc_host->devloss_work_q = NULL; |
| 1701 | destroy_workqueue(work_q); |
| 1702 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1703 | } |
| 1704 | EXPORT_SYMBOL(fc_remove_host); |
| 1705 | |
James Smart | aedf349 | 2006-04-10 10:14:05 -0400 | [diff] [blame] | 1706 | |
| 1707 | /** |
| 1708 | * fc_starget_delete - called to delete the scsi decendents of an rport |
| 1709 | * (target and all sdevs) |
| 1710 | * |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 1711 | * @work: remote port to be operated on. |
James Smart | aedf349 | 2006-04-10 10:14:05 -0400 | [diff] [blame] | 1712 | **/ |
James.Smart@Emulex.Com | 19a7b4a | 2005-10-18 12:03:35 -0400 | [diff] [blame] | 1713 | static void |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 1714 | fc_starget_delete(struct work_struct *work) |
James.Smart@Emulex.Com | 19a7b4a | 2005-10-18 12:03:35 -0400 | [diff] [blame] | 1715 | { |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 1716 | struct fc_rport *rport = |
| 1717 | container_of(work, struct fc_rport, stgt_delete_work); |
James.Smart@Emulex.Com | 19a7b4a | 2005-10-18 12:03:35 -0400 | [diff] [blame] | 1718 | struct Scsi_Host *shost = rport_to_shost(rport); |
James Smart | aedf349 | 2006-04-10 10:14:05 -0400 | [diff] [blame] | 1719 | unsigned long flags; |
James Smart | 0f29b96 | 2006-08-18 17:33:29 -0400 | [diff] [blame] | 1720 | struct fc_internal *i = to_fc_internal(shost->transportt); |
| 1721 | |
| 1722 | /* |
| 1723 | * Involve the LLDD if possible. All io on the rport is to |
| 1724 | * be terminated, either as part of the dev_loss_tmo callback |
| 1725 | * processing, or via the terminate_rport_io function. |
| 1726 | */ |
| 1727 | if (i->f->dev_loss_tmo_callbk) |
| 1728 | i->f->dev_loss_tmo_callbk(rport); |
| 1729 | else if (i->f->terminate_rport_io) |
| 1730 | i->f->terminate_rport_io(rport); |
James.Smart@Emulex.Com | 19a7b4a | 2005-10-18 12:03:35 -0400 | [diff] [blame] | 1731 | |
James Smart | aedf349 | 2006-04-10 10:14:05 -0400 | [diff] [blame] | 1732 | spin_lock_irqsave(shost->host_lock, flags); |
| 1733 | if (rport->flags & FC_RPORT_DEVLOSS_PENDING) { |
| 1734 | spin_unlock_irqrestore(shost->host_lock, flags); |
James Smart | 0f29b96 | 2006-08-18 17:33:29 -0400 | [diff] [blame] | 1735 | if (!cancel_delayed_work(&rport->fail_io_work)) |
| 1736 | fc_flush_devloss(shost); |
James Smart | aedf349 | 2006-04-10 10:14:05 -0400 | [diff] [blame] | 1737 | if (!cancel_delayed_work(&rport->dev_loss_work)) |
| 1738 | fc_flush_devloss(shost); |
| 1739 | spin_lock_irqsave(shost->host_lock, flags); |
| 1740 | rport->flags &= ~FC_RPORT_DEVLOSS_PENDING; |
| 1741 | } |
| 1742 | spin_unlock_irqrestore(shost->host_lock, flags); |
James.Smart@Emulex.Com | 19a7b4a | 2005-10-18 12:03:35 -0400 | [diff] [blame] | 1743 | |
| 1744 | scsi_remove_target(&rport->dev); |
| 1745 | } |
| 1746 | |
James Smart | aedf349 | 2006-04-10 10:14:05 -0400 | [diff] [blame] | 1747 | |
| 1748 | /** |
| 1749 | * fc_rport_final_delete - finish rport termination and delete it. |
| 1750 | * |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 1751 | * @work: remote port to be deleted. |
James Smart | aedf349 | 2006-04-10 10:14:05 -0400 | [diff] [blame] | 1752 | **/ |
| 1753 | static void |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 1754 | fc_rport_final_delete(struct work_struct *work) |
James Smart | aedf349 | 2006-04-10 10:14:05 -0400 | [diff] [blame] | 1755 | { |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 1756 | struct fc_rport *rport = |
| 1757 | container_of(work, struct fc_rport, rport_delete_work); |
James Smart | aedf349 | 2006-04-10 10:14:05 -0400 | [diff] [blame] | 1758 | struct device *dev = &rport->dev; |
| 1759 | struct Scsi_Host *shost = rport_to_shost(rport); |
James Smart | 0f29b96 | 2006-08-18 17:33:29 -0400 | [diff] [blame] | 1760 | struct fc_internal *i = to_fc_internal(shost->transportt); |
James Smart | aedf349 | 2006-04-10 10:14:05 -0400 | [diff] [blame] | 1761 | |
| 1762 | /* |
| 1763 | * if a scan is pending, flush the SCSI Host work_q so that |
| 1764 | * that we can reclaim the rport scan work element. |
| 1765 | */ |
| 1766 | if (rport->flags & FC_RPORT_SCAN_PENDING) |
| 1767 | scsi_flush_work(shost); |
| 1768 | |
James Smart | 0f29b96 | 2006-08-18 17:33:29 -0400 | [diff] [blame] | 1769 | /* Delete SCSI target and sdevs */ |
| 1770 | if (rport->scsi_target_id != -1) |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 1771 | fc_starget_delete(&rport->stgt_delete_work); |
James Smart | 0f29b96 | 2006-08-18 17:33:29 -0400 | [diff] [blame] | 1772 | else if (i->f->dev_loss_tmo_callbk) |
| 1773 | i->f->dev_loss_tmo_callbk(rport); |
| 1774 | else if (i->f->terminate_rport_io) |
| 1775 | i->f->terminate_rport_io(rport); |
| 1776 | |
James Smart | aedf349 | 2006-04-10 10:14:05 -0400 | [diff] [blame] | 1777 | transport_remove_device(dev); |
| 1778 | device_del(dev); |
| 1779 | transport_destroy_device(dev); |
James Smart | 3bdad7b | 2006-06-26 14:19:59 -0400 | [diff] [blame] | 1780 | put_device(&shost->shost_gendev); /* for fc_host->rport list */ |
| 1781 | put_device(dev); /* for self-reference */ |
James Smart | aedf349 | 2006-04-10 10:14:05 -0400 | [diff] [blame] | 1782 | } |
| 1783 | |
| 1784 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1785 | /** |
| 1786 | * fc_rport_create - allocates and creates a remote FC port. |
| 1787 | * @shost: scsi host the remote port is connected to. |
| 1788 | * @channel: Channel on shost port connected to. |
| 1789 | * @ids: The world wide names, fc address, and FC4 port |
| 1790 | * roles for the remote port. |
| 1791 | * |
| 1792 | * Allocates and creates the remoter port structure, including the |
| 1793 | * class and sysfs creation. |
| 1794 | * |
| 1795 | * Notes: |
| 1796 | * This routine assumes no locks are held on entry. |
| 1797 | **/ |
| 1798 | struct fc_rport * |
| 1799 | fc_rport_create(struct Scsi_Host *shost, int channel, |
| 1800 | struct fc_rport_identifiers *ids) |
| 1801 | { |
James Smart | aedf349 | 2006-04-10 10:14:05 -0400 | [diff] [blame] | 1802 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1803 | struct fc_internal *fci = to_fc_internal(shost->transportt); |
| 1804 | struct fc_rport *rport; |
| 1805 | struct device *dev; |
| 1806 | unsigned long flags; |
| 1807 | int error; |
| 1808 | size_t size; |
| 1809 | |
| 1810 | size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size); |
Jes Sorensen | 24669f75 | 2006-01-16 10:31:18 -0500 | [diff] [blame] | 1811 | rport = kzalloc(size, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1812 | if (unlikely(!rport)) { |
| 1813 | printk(KERN_ERR "%s: allocation failure\n", __FUNCTION__); |
| 1814 | return NULL; |
| 1815 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1816 | |
| 1817 | rport->maxframe_size = -1; |
| 1818 | rport->supported_classes = FC_COS_UNSPECIFIED; |
| 1819 | rport->dev_loss_tmo = fc_dev_loss_tmo; |
| 1820 | memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name)); |
| 1821 | memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name)); |
| 1822 | rport->port_id = ids->port_id; |
| 1823 | rport->roles = ids->roles; |
| 1824 | rport->port_state = FC_PORTSTATE_ONLINE; |
| 1825 | if (fci->f->dd_fcrport_size) |
| 1826 | rport->dd_data = &rport[1]; |
| 1827 | rport->channel = channel; |
James Smart | 0f29b96 | 2006-08-18 17:33:29 -0400 | [diff] [blame] | 1828 | rport->fast_io_fail_tmo = -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1829 | |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 1830 | INIT_DELAYED_WORK(&rport->dev_loss_work, fc_timeout_deleted_rport); |
| 1831 | INIT_DELAYED_WORK(&rport->fail_io_work, fc_timeout_fail_rport_io); |
| 1832 | INIT_WORK(&rport->scan_work, fc_scsi_scan_rport); |
| 1833 | INIT_WORK(&rport->stgt_delete_work, fc_starget_delete); |
| 1834 | INIT_WORK(&rport->rport_delete_work, fc_rport_final_delete); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1835 | |
| 1836 | spin_lock_irqsave(shost->host_lock, flags); |
| 1837 | |
| 1838 | rport->number = fc_host->next_rport_number++; |
| 1839 | if (rport->roles & FC_RPORT_ROLE_FCP_TARGET) |
| 1840 | rport->scsi_target_id = fc_host->next_target_id++; |
| 1841 | else |
| 1842 | rport->scsi_target_id = -1; |
James Smart | aedf349 | 2006-04-10 10:14:05 -0400 | [diff] [blame] | 1843 | list_add_tail(&rport->peers, &fc_host->rports); |
James Smart | 3bdad7b | 2006-06-26 14:19:59 -0400 | [diff] [blame] | 1844 | get_device(&shost->shost_gendev); /* for fc_host->rport list */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1845 | |
| 1846 | spin_unlock_irqrestore(shost->host_lock, flags); |
| 1847 | |
| 1848 | dev = &rport->dev; |
James Smart | 3bdad7b | 2006-06-26 14:19:59 -0400 | [diff] [blame] | 1849 | device_initialize(dev); /* takes self reference */ |
| 1850 | dev->parent = get_device(&shost->shost_gendev); /* parent reference */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1851 | dev->release = fc_rport_dev_release; |
| 1852 | sprintf(dev->bus_id, "rport-%d:%d-%d", |
| 1853 | shost->host_no, channel, rport->number); |
| 1854 | transport_setup_device(dev); |
| 1855 | |
| 1856 | error = device_add(dev); |
| 1857 | if (error) { |
| 1858 | printk(KERN_ERR "FC Remote Port device_add failed\n"); |
| 1859 | goto delete_rport; |
| 1860 | } |
| 1861 | transport_add_device(dev); |
| 1862 | transport_configure_device(dev); |
| 1863 | |
James Smart | aedf349 | 2006-04-10 10:14:05 -0400 | [diff] [blame] | 1864 | if (rport->roles & FC_RPORT_ROLE_FCP_TARGET) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1865 | /* initiate a scan of the target */ |
James Smart | aedf349 | 2006-04-10 10:14:05 -0400 | [diff] [blame] | 1866 | rport->flags |= FC_RPORT_SCAN_PENDING; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1867 | scsi_queue_work(shost, &rport->scan_work); |
James Smart | aedf349 | 2006-04-10 10:14:05 -0400 | [diff] [blame] | 1868 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1869 | |
| 1870 | return rport; |
| 1871 | |
| 1872 | delete_rport: |
| 1873 | transport_destroy_device(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1874 | spin_lock_irqsave(shost->host_lock, flags); |
| 1875 | list_del(&rport->peers); |
James Smart | 3bdad7b | 2006-06-26 14:19:59 -0400 | [diff] [blame] | 1876 | put_device(&shost->shost_gendev); /* for fc_host->rport list */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1877 | spin_unlock_irqrestore(shost->host_lock, flags); |
| 1878 | put_device(dev->parent); |
| 1879 | kfree(rport); |
| 1880 | return NULL; |
| 1881 | } |
| 1882 | |
| 1883 | /** |
| 1884 | * fc_remote_port_add - notifies the fc transport of the existence |
| 1885 | * of a remote FC port. |
| 1886 | * @shost: scsi host the remote port is connected to. |
| 1887 | * @channel: Channel on shost port connected to. |
| 1888 | * @ids: The world wide names, fc address, and FC4 port |
| 1889 | * roles for the remote port. |
| 1890 | * |
| 1891 | * The LLDD calls this routine to notify the transport of the existence |
| 1892 | * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn) |
| 1893 | * of the port, it's FC address (port_id), and the FC4 roles that are |
| 1894 | * active for the port. |
| 1895 | * |
| 1896 | * For ports that are FCP targets (aka scsi targets), the FC transport |
| 1897 | * maintains consistent target id bindings on behalf of the LLDD. |
| 1898 | * A consistent target id binding is an assignment of a target id to |
| 1899 | * a remote port identifier, which persists while the scsi host is |
| 1900 | * attached. The remote port can disappear, then later reappear, and |
| 1901 | * it's target id assignment remains the same. This allows for shifts |
| 1902 | * in FC addressing (if binding by wwpn or wwnn) with no apparent |
| 1903 | * changes to the scsi subsystem which is based on scsi host number and |
| 1904 | * target id values. Bindings are only valid during the attachment of |
| 1905 | * the scsi host. If the host detaches, then later re-attaches, target |
| 1906 | * id bindings may change. |
| 1907 | * |
| 1908 | * This routine is responsible for returning a remote port structure. |
| 1909 | * The routine will search the list of remote ports it maintains |
| 1910 | * internally on behalf of consistent target id mappings. If found, the |
| 1911 | * remote port structure will be reused. Otherwise, a new remote port |
| 1912 | * structure will be allocated. |
| 1913 | * |
| 1914 | * Whenever a remote port is allocated, a new fc_remote_port class |
| 1915 | * device is created. |
| 1916 | * |
| 1917 | * Should not be called from interrupt context. |
| 1918 | * |
| 1919 | * Notes: |
| 1920 | * This routine assumes no locks are held on entry. |
| 1921 | **/ |
| 1922 | struct fc_rport * |
| 1923 | fc_remote_port_add(struct Scsi_Host *shost, int channel, |
| 1924 | struct fc_rport_identifiers *ids) |
| 1925 | { |
James.Smart@Emulex.Com | 19a7b4a | 2005-10-18 12:03:35 -0400 | [diff] [blame] | 1926 | struct fc_internal *fci = to_fc_internal(shost->transportt); |
James Smart | aedf349 | 2006-04-10 10:14:05 -0400 | [diff] [blame] | 1927 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1928 | struct fc_rport *rport; |
| 1929 | unsigned long flags; |
| 1930 | int match = 0; |
| 1931 | |
James Smart | aedf349 | 2006-04-10 10:14:05 -0400 | [diff] [blame] | 1932 | /* ensure any stgt delete functions are done */ |
| 1933 | fc_flush_work(shost); |
| 1934 | |
James.Smart@Emulex.Com | 19a7b4a | 2005-10-18 12:03:35 -0400 | [diff] [blame] | 1935 | /* |
| 1936 | * Search the list of "active" rports, for an rport that has been |
| 1937 | * deleted, but we've held off the real delete while the target |
| 1938 | * is in a "blocked" state. |
| 1939 | */ |
| 1940 | spin_lock_irqsave(shost->host_lock, flags); |
| 1941 | |
James Smart | aedf349 | 2006-04-10 10:14:05 -0400 | [diff] [blame] | 1942 | list_for_each_entry(rport, &fc_host->rports, peers) { |
James.Smart@Emulex.Com | 19a7b4a | 2005-10-18 12:03:35 -0400 | [diff] [blame] | 1943 | |
| 1944 | if ((rport->port_state == FC_PORTSTATE_BLOCKED) && |
| 1945 | (rport->channel == channel)) { |
| 1946 | |
James Smart | aedf349 | 2006-04-10 10:14:05 -0400 | [diff] [blame] | 1947 | switch (fc_host->tgtid_bind_type) { |
James.Smart@Emulex.Com | 19a7b4a | 2005-10-18 12:03:35 -0400 | [diff] [blame] | 1948 | case FC_TGTID_BIND_BY_WWPN: |
| 1949 | case FC_TGTID_BIND_NONE: |
| 1950 | if (rport->port_name == ids->port_name) |
| 1951 | match = 1; |
| 1952 | break; |
| 1953 | case FC_TGTID_BIND_BY_WWNN: |
| 1954 | if (rport->node_name == ids->node_name) |
| 1955 | match = 1; |
| 1956 | break; |
| 1957 | case FC_TGTID_BIND_BY_ID: |
| 1958 | if (rport->port_id == ids->port_id) |
| 1959 | match = 1; |
| 1960 | break; |
| 1961 | } |
| 1962 | |
| 1963 | if (match) { |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 1964 | struct delayed_work *work = |
James.Smart@Emulex.Com | 19a7b4a | 2005-10-18 12:03:35 -0400 | [diff] [blame] | 1965 | &rport->dev_loss_work; |
| 1966 | |
| 1967 | memcpy(&rport->node_name, &ids->node_name, |
| 1968 | sizeof(rport->node_name)); |
| 1969 | memcpy(&rport->port_name, &ids->port_name, |
| 1970 | sizeof(rport->port_name)); |
| 1971 | rport->port_id = ids->port_id; |
| 1972 | |
| 1973 | rport->port_state = FC_PORTSTATE_ONLINE; |
| 1974 | rport->roles = ids->roles; |
| 1975 | |
| 1976 | spin_unlock_irqrestore(shost->host_lock, flags); |
| 1977 | |
| 1978 | if (fci->f->dd_fcrport_size) |
| 1979 | memset(rport->dd_data, 0, |
| 1980 | fci->f->dd_fcrport_size); |
| 1981 | |
| 1982 | /* |
| 1983 | * If we were blocked, we were a target. |
| 1984 | * If no longer a target, we leave the timer |
| 1985 | * running in case the port changes roles |
| 1986 | * prior to the timer expiring. If the timer |
| 1987 | * fires, the target will be torn down. |
| 1988 | */ |
| 1989 | if (!(ids->roles & FC_RPORT_ROLE_FCP_TARGET)) |
| 1990 | return rport; |
| 1991 | |
| 1992 | /* restart the target */ |
| 1993 | |
| 1994 | /* |
James Smart | 0f29b96 | 2006-08-18 17:33:29 -0400 | [diff] [blame] | 1995 | * Stop the target timers first. Take no action |
James.Smart@Emulex.Com | 19a7b4a | 2005-10-18 12:03:35 -0400 | [diff] [blame] | 1996 | * on the del_timer failure as the state |
| 1997 | * machine state change will validate the |
| 1998 | * transaction. |
| 1999 | */ |
James Smart | 0f29b96 | 2006-08-18 17:33:29 -0400 | [diff] [blame] | 2000 | if (!cancel_delayed_work(&rport->fail_io_work)) |
| 2001 | fc_flush_devloss(shost); |
James.Smart@Emulex.Com | 19a7b4a | 2005-10-18 12:03:35 -0400 | [diff] [blame] | 2002 | if (!cancel_delayed_work(work)) |
James Smart | aedf349 | 2006-04-10 10:14:05 -0400 | [diff] [blame] | 2003 | fc_flush_devloss(shost); |
| 2004 | |
| 2005 | spin_lock_irqsave(shost->host_lock, flags); |
| 2006 | |
| 2007 | rport->flags &= ~FC_RPORT_DEVLOSS_PENDING; |
James.Smart@Emulex.Com | 19a7b4a | 2005-10-18 12:03:35 -0400 | [diff] [blame] | 2008 | |
| 2009 | /* initiate a scan of the target */ |
James Smart | aedf349 | 2006-04-10 10:14:05 -0400 | [diff] [blame] | 2010 | rport->flags |= FC_RPORT_SCAN_PENDING; |
James.Smart@Emulex.Com | 19a7b4a | 2005-10-18 12:03:35 -0400 | [diff] [blame] | 2011 | scsi_queue_work(shost, &rport->scan_work); |
| 2012 | |
James Smart | aedf349 | 2006-04-10 10:14:05 -0400 | [diff] [blame] | 2013 | spin_unlock_irqrestore(shost->host_lock, flags); |
| 2014 | |
James Smart | a0785ed | 2006-05-11 13:27:09 -0400 | [diff] [blame] | 2015 | scsi_target_unblock(&rport->dev); |
| 2016 | |
James.Smart@Emulex.Com | 19a7b4a | 2005-10-18 12:03:35 -0400 | [diff] [blame] | 2017 | return rport; |
| 2018 | } |
| 2019 | } |
| 2020 | } |
| 2021 | |
| 2022 | /* Search the bindings array */ |
James Smart | aedf349 | 2006-04-10 10:14:05 -0400 | [diff] [blame] | 2023 | if (fc_host->tgtid_bind_type != FC_TGTID_BIND_NONE) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2024 | |
| 2025 | /* search for a matching consistent binding */ |
| 2026 | |
James Smart | aedf349 | 2006-04-10 10:14:05 -0400 | [diff] [blame] | 2027 | list_for_each_entry(rport, &fc_host->rport_bindings, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2028 | peers) { |
| 2029 | if (rport->channel != channel) |
| 2030 | continue; |
| 2031 | |
James Smart | aedf349 | 2006-04-10 10:14:05 -0400 | [diff] [blame] | 2032 | switch (fc_host->tgtid_bind_type) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2033 | case FC_TGTID_BIND_BY_WWPN: |
| 2034 | if (rport->port_name == ids->port_name) |
| 2035 | match = 1; |
| 2036 | break; |
| 2037 | case FC_TGTID_BIND_BY_WWNN: |
| 2038 | if (rport->node_name == ids->node_name) |
| 2039 | match = 1; |
| 2040 | break; |
| 2041 | case FC_TGTID_BIND_BY_ID: |
| 2042 | if (rport->port_id == ids->port_id) |
| 2043 | match = 1; |
| 2044 | break; |
| 2045 | case FC_TGTID_BIND_NONE: /* to keep compiler happy */ |
| 2046 | break; |
| 2047 | } |
| 2048 | |
| 2049 | if (match) { |
James Smart | aedf349 | 2006-04-10 10:14:05 -0400 | [diff] [blame] | 2050 | list_move_tail(&rport->peers, &fc_host->rports); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2051 | break; |
| 2052 | } |
| 2053 | } |
| 2054 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2055 | if (match) { |
| 2056 | memcpy(&rport->node_name, &ids->node_name, |
| 2057 | sizeof(rport->node_name)); |
| 2058 | memcpy(&rport->port_name, &ids->port_name, |
| 2059 | sizeof(rport->port_name)); |
| 2060 | rport->port_id = ids->port_id; |
| 2061 | rport->roles = ids->roles; |
| 2062 | rport->port_state = FC_PORTSTATE_ONLINE; |
| 2063 | |
James.Smart@Emulex.Com | 19a7b4a | 2005-10-18 12:03:35 -0400 | [diff] [blame] | 2064 | if (fci->f->dd_fcrport_size) |
| 2065 | memset(rport->dd_data, 0, |
| 2066 | fci->f->dd_fcrport_size); |
| 2067 | |
James Smart | aedf349 | 2006-04-10 10:14:05 -0400 | [diff] [blame] | 2068 | if (rport->roles & FC_RPORT_ROLE_FCP_TARGET) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2069 | /* initiate a scan of the target */ |
James Smart | aedf349 | 2006-04-10 10:14:05 -0400 | [diff] [blame] | 2070 | rport->flags |= FC_RPORT_SCAN_PENDING; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2071 | scsi_queue_work(shost, &rport->scan_work); |
James Smart | a0785ed | 2006-05-11 13:27:09 -0400 | [diff] [blame] | 2072 | spin_unlock_irqrestore(shost->host_lock, flags); |
| 2073 | scsi_target_unblock(&rport->dev); |
| 2074 | } else |
| 2075 | spin_unlock_irqrestore(shost->host_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2076 | |
| 2077 | return rport; |
| 2078 | } |
| 2079 | } |
| 2080 | |
James.Smart@Emulex.Com | 19a7b4a | 2005-10-18 12:03:35 -0400 | [diff] [blame] | 2081 | spin_unlock_irqrestore(shost->host_lock, flags); |
| 2082 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2083 | /* No consistent binding found - create new remote port entry */ |
| 2084 | rport = fc_rport_create(shost, channel, ids); |
| 2085 | |
| 2086 | return rport; |
| 2087 | } |
| 2088 | EXPORT_SYMBOL(fc_remote_port_add); |
| 2089 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2090 | |
| 2091 | /** |
| 2092 | * fc_remote_port_delete - notifies the fc transport that a remote |
| 2093 | * port is no longer in existence. |
| 2094 | * @rport: The remote port that no longer exists |
| 2095 | * |
| 2096 | * The LLDD calls this routine to notify the transport that a remote |
| 2097 | * port is no longer part of the topology. Note: Although a port |
| 2098 | * may no longer be part of the topology, it may persist in the remote |
James.Smart@Emulex.Com | 19a7b4a | 2005-10-18 12:03:35 -0400 | [diff] [blame] | 2099 | * ports displayed by the fc_host. We do this under 2 conditions: |
| 2100 | * - If the port was a scsi target, we delay its deletion by "blocking" it. |
| 2101 | * This allows the port to temporarily disappear, then reappear without |
| 2102 | * disrupting the SCSI device tree attached to it. During the "blocked" |
| 2103 | * period the port will still exist. |
| 2104 | * - If the port was a scsi target and disappears for longer than we |
| 2105 | * expect, we'll delete the port and the tear down the SCSI device tree |
| 2106 | * attached to it. However, we want to semi-persist the target id assigned |
| 2107 | * to that port if it eventually does exist. The port structure will |
| 2108 | * remain (although with minimal information) so that the target id |
| 2109 | * bindings remails. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2110 | * |
| 2111 | * If the remote port is not an FCP Target, it will be fully torn down |
| 2112 | * and deallocated, including the fc_remote_port class device. |
| 2113 | * |
James.Smart@Emulex.Com | 19a7b4a | 2005-10-18 12:03:35 -0400 | [diff] [blame] | 2114 | * If the remote port is an FCP Target, the port will be placed in a |
| 2115 | * temporary blocked state. From the LLDD's perspective, the rport no |
| 2116 | * longer exists. From the SCSI midlayer's perspective, the SCSI target |
| 2117 | * exists, but all sdevs on it are blocked from further I/O. The following |
| 2118 | * is then expected: |
| 2119 | * If the remote port does not return (signaled by a LLDD call to |
| 2120 | * fc_remote_port_add()) within the dev_loss_tmo timeout, then the |
| 2121 | * scsi target is removed - killing all outstanding i/o and removing the |
| 2122 | * scsi devices attached ot it. The port structure will be marked Not |
| 2123 | * Present and be partially cleared, leaving only enough information to |
| 2124 | * recognize the remote port relative to the scsi target id binding if |
| 2125 | * it later appears. The port will remain as long as there is a valid |
| 2126 | * binding (e.g. until the user changes the binding type or unloads the |
| 2127 | * scsi host with the binding). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2128 | * |
James.Smart@Emulex.Com | 19a7b4a | 2005-10-18 12:03:35 -0400 | [diff] [blame] | 2129 | * If the remote port returns within the dev_loss_tmo value (and matches |
| 2130 | * according to the target id binding type), the port structure will be |
| 2131 | * reused. If it is no longer a SCSI target, the target will be torn |
| 2132 | * down. If it continues to be a SCSI target, then the target will be |
| 2133 | * unblocked (allowing i/o to be resumed), and a scan will be activated |
| 2134 | * to ensure that all luns are detected. |
| 2135 | * |
| 2136 | * Called from normal process context only - cannot be called from interrupt. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2137 | * |
| 2138 | * Notes: |
| 2139 | * This routine assumes no locks are held on entry. |
| 2140 | **/ |
| 2141 | void |
| 2142 | fc_remote_port_delete(struct fc_rport *rport) |
| 2143 | { |
James Smart | aedf349 | 2006-04-10 10:14:05 -0400 | [diff] [blame] | 2144 | struct Scsi_Host *shost = rport_to_shost(rport); |
James Smart | 0f29b96 | 2006-08-18 17:33:29 -0400 | [diff] [blame] | 2145 | struct fc_internal *i = to_fc_internal(shost->transportt); |
James.Smart@Emulex.Com | 19a7b4a | 2005-10-18 12:03:35 -0400 | [diff] [blame] | 2146 | int timeout = rport->dev_loss_tmo; |
James Smart | aedf349 | 2006-04-10 10:14:05 -0400 | [diff] [blame] | 2147 | unsigned long flags; |
| 2148 | |
| 2149 | /* |
| 2150 | * No need to flush the fc_host work_q's, as all adds are synchronous. |
| 2151 | * |
| 2152 | * We do need to reclaim the rport scan work element, so eventually |
| 2153 | * (in fc_rport_final_delete()) we'll flush the scsi host work_q if |
| 2154 | * there's still a scan pending. |
| 2155 | */ |
| 2156 | |
| 2157 | spin_lock_irqsave(shost->host_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2158 | |
James.Smart@Emulex.Com | 19a7b4a | 2005-10-18 12:03:35 -0400 | [diff] [blame] | 2159 | /* If no scsi target id mapping, delete it */ |
| 2160 | if (rport->scsi_target_id == -1) { |
James Smart | aedf349 | 2006-04-10 10:14:05 -0400 | [diff] [blame] | 2161 | list_del(&rport->peers); |
| 2162 | rport->port_state = FC_PORTSTATE_DELETED; |
| 2163 | fc_queue_work(shost, &rport->rport_delete_work); |
| 2164 | spin_unlock_irqrestore(shost->host_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2165 | return; |
| 2166 | } |
| 2167 | |
James Smart | aedf349 | 2006-04-10 10:14:05 -0400 | [diff] [blame] | 2168 | rport->port_state = FC_PORTSTATE_BLOCKED; |
| 2169 | |
| 2170 | rport->flags |= FC_RPORT_DEVLOSS_PENDING; |
| 2171 | |
| 2172 | spin_unlock_irqrestore(shost->host_lock, flags); |
| 2173 | |
James.Smart@Emulex.Com | 19a7b4a | 2005-10-18 12:03:35 -0400 | [diff] [blame] | 2174 | scsi_target_block(&rport->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2175 | |
James Smart | 0f29b96 | 2006-08-18 17:33:29 -0400 | [diff] [blame] | 2176 | /* see if we need to kill io faster than waiting for device loss */ |
| 2177 | if ((rport->fast_io_fail_tmo != -1) && |
| 2178 | (rport->fast_io_fail_tmo < timeout) && (i->f->terminate_rport_io)) |
| 2179 | fc_queue_devloss_work(shost, &rport->fail_io_work, |
| 2180 | rport->fast_io_fail_tmo * HZ); |
| 2181 | |
James.Smart@Emulex.Com | 19a7b4a | 2005-10-18 12:03:35 -0400 | [diff] [blame] | 2182 | /* cap the length the devices can be blocked until they are deleted */ |
James Smart | aedf349 | 2006-04-10 10:14:05 -0400 | [diff] [blame] | 2183 | fc_queue_devloss_work(shost, &rport->dev_loss_work, timeout * HZ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2184 | } |
| 2185 | EXPORT_SYMBOL(fc_remote_port_delete); |
| 2186 | |
| 2187 | /** |
| 2188 | * fc_remote_port_rolechg - notifies the fc transport that the roles |
| 2189 | * on a remote may have changed. |
| 2190 | * @rport: The remote port that changed. |
| 2191 | * |
| 2192 | * The LLDD calls this routine to notify the transport that the roles |
| 2193 | * on a remote port may have changed. The largest effect of this is |
| 2194 | * if a port now becomes a FCP Target, it must be allocated a |
| 2195 | * scsi target id. If the port is no longer a FCP target, any |
| 2196 | * scsi target id value assigned to it will persist in case the |
| 2197 | * role changes back to include FCP Target. No changes in the scsi |
| 2198 | * midlayer will be invoked if the role changes (in the expectation |
| 2199 | * that the role will be resumed. If it doesn't normal error processing |
| 2200 | * will take place). |
| 2201 | * |
| 2202 | * Should not be called from interrupt context. |
| 2203 | * |
| 2204 | * Notes: |
| 2205 | * This routine assumes no locks are held on entry. |
| 2206 | **/ |
| 2207 | void |
| 2208 | fc_remote_port_rolechg(struct fc_rport *rport, u32 roles) |
| 2209 | { |
| 2210 | struct Scsi_Host *shost = rport_to_shost(rport); |
James Smart | aedf349 | 2006-04-10 10:14:05 -0400 | [diff] [blame] | 2211 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2212 | unsigned long flags; |
| 2213 | int create = 0; |
| 2214 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2215 | spin_lock_irqsave(shost->host_lock, flags); |
James.Smart@Emulex.Com | 19a7b4a | 2005-10-18 12:03:35 -0400 | [diff] [blame] | 2216 | if (roles & FC_RPORT_ROLE_FCP_TARGET) { |
| 2217 | if (rport->scsi_target_id == -1) { |
| 2218 | rport->scsi_target_id = fc_host->next_target_id++; |
| 2219 | create = 1; |
| 2220 | } else if (!(rport->roles & FC_RPORT_ROLE_FCP_TARGET)) |
| 2221 | create = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2222 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2223 | |
James.Smart@Emulex.Com | 19a7b4a | 2005-10-18 12:03:35 -0400 | [diff] [blame] | 2224 | rport->roles = roles; |
| 2225 | |
James Smart | aedf349 | 2006-04-10 10:14:05 -0400 | [diff] [blame] | 2226 | spin_unlock_irqrestore(shost->host_lock, flags); |
| 2227 | |
James.Smart@Emulex.Com | 19a7b4a | 2005-10-18 12:03:35 -0400 | [diff] [blame] | 2228 | if (create) { |
| 2229 | /* |
| 2230 | * There may have been a delete timer running on the |
| 2231 | * port. Ensure that it is cancelled as we now know |
| 2232 | * the port is an FCP Target. |
| 2233 | * Note: we know the rport is exists and in an online |
| 2234 | * state as the LLDD would not have had an rport |
| 2235 | * reference to pass us. |
| 2236 | * |
| 2237 | * Take no action on the del_timer failure as the state |
| 2238 | * machine state change will validate the |
| 2239 | * transaction. |
| 2240 | */ |
James Smart | 0f29b96 | 2006-08-18 17:33:29 -0400 | [diff] [blame] | 2241 | if (!cancel_delayed_work(&rport->fail_io_work)) |
| 2242 | fc_flush_devloss(shost); |
James.Smart@Emulex.Com | 19a7b4a | 2005-10-18 12:03:35 -0400 | [diff] [blame] | 2243 | if (!cancel_delayed_work(&rport->dev_loss_work)) |
James Smart | aedf349 | 2006-04-10 10:14:05 -0400 | [diff] [blame] | 2244 | fc_flush_devloss(shost); |
| 2245 | |
| 2246 | spin_lock_irqsave(shost->host_lock, flags); |
| 2247 | rport->flags &= ~FC_RPORT_DEVLOSS_PENDING; |
| 2248 | spin_unlock_irqrestore(shost->host_lock, flags); |
| 2249 | |
| 2250 | /* ensure any stgt delete functions are done */ |
| 2251 | fc_flush_work(shost); |
James.Smart@Emulex.Com | 19a7b4a | 2005-10-18 12:03:35 -0400 | [diff] [blame] | 2252 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2253 | /* initiate a scan of the target */ |
James Smart | aedf349 | 2006-04-10 10:14:05 -0400 | [diff] [blame] | 2254 | spin_lock_irqsave(shost->host_lock, flags); |
| 2255 | rport->flags |= FC_RPORT_SCAN_PENDING; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2256 | scsi_queue_work(shost, &rport->scan_work); |
James Smart | aedf349 | 2006-04-10 10:14:05 -0400 | [diff] [blame] | 2257 | spin_unlock_irqrestore(shost->host_lock, flags); |
James Smart | a0785ed | 2006-05-11 13:27:09 -0400 | [diff] [blame] | 2258 | scsi_target_unblock(&rport->dev); |
James.Smart@Emulex.Com | 19a7b4a | 2005-10-18 12:03:35 -0400 | [diff] [blame] | 2259 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2260 | } |
| 2261 | EXPORT_SYMBOL(fc_remote_port_rolechg); |
| 2262 | |
| 2263 | /** |
James.Smart@Emulex.Com | 19a7b4a | 2005-10-18 12:03:35 -0400 | [diff] [blame] | 2264 | * fc_timeout_deleted_rport - Timeout handler for a deleted remote port that |
| 2265 | * was a SCSI target (thus was blocked), and failed |
| 2266 | * to return in the alloted time. |
| 2267 | * |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 2268 | * @work: rport target that failed to reappear in the alloted time. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2269 | **/ |
| 2270 | static void |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 2271 | fc_timeout_deleted_rport(struct work_struct *work) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2272 | { |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 2273 | struct fc_rport *rport = |
| 2274 | container_of(work, struct fc_rport, dev_loss_work.work); |
James.Smart@Emulex.Com | 19a7b4a | 2005-10-18 12:03:35 -0400 | [diff] [blame] | 2275 | struct Scsi_Host *shost = rport_to_shost(rport); |
James Smart | aedf349 | 2006-04-10 10:14:05 -0400 | [diff] [blame] | 2276 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
James.Smart@Emulex.Com | 19a7b4a | 2005-10-18 12:03:35 -0400 | [diff] [blame] | 2277 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2278 | |
James.Smart@Emulex.Com | 19a7b4a | 2005-10-18 12:03:35 -0400 | [diff] [blame] | 2279 | spin_lock_irqsave(shost->host_lock, flags); |
| 2280 | |
James Smart | aedf349 | 2006-04-10 10:14:05 -0400 | [diff] [blame] | 2281 | rport->flags &= ~FC_RPORT_DEVLOSS_PENDING; |
| 2282 | |
James.Smart@Emulex.Com | 19a7b4a | 2005-10-18 12:03:35 -0400 | [diff] [blame] | 2283 | /* |
James Smart | aedf349 | 2006-04-10 10:14:05 -0400 | [diff] [blame] | 2284 | * If the port is ONLINE, then it came back. Validate it's still an |
| 2285 | * FCP target. If not, tear down the scsi_target on it. |
James.Smart@Emulex.Com | 19a7b4a | 2005-10-18 12:03:35 -0400 | [diff] [blame] | 2286 | */ |
James Smart | aedf349 | 2006-04-10 10:14:05 -0400 | [diff] [blame] | 2287 | if ((rport->port_state == FC_PORTSTATE_ONLINE) && |
| 2288 | !(rport->roles & FC_RPORT_ROLE_FCP_TARGET)) { |
James.Smart@Emulex.Com | 19a7b4a | 2005-10-18 12:03:35 -0400 | [diff] [blame] | 2289 | dev_printk(KERN_ERR, &rport->dev, |
James Smart | aedf349 | 2006-04-10 10:14:05 -0400 | [diff] [blame] | 2290 | "blocked FC remote port time out: no longer" |
| 2291 | " a FCP target, removing starget\n"); |
James Smart | aedf349 | 2006-04-10 10:14:05 -0400 | [diff] [blame] | 2292 | spin_unlock_irqrestore(shost->host_lock, flags); |
James Smart | a0785ed | 2006-05-11 13:27:09 -0400 | [diff] [blame] | 2293 | scsi_target_unblock(&rport->dev); |
| 2294 | fc_queue_work(shost, &rport->stgt_delete_work); |
James.Smart@Emulex.Com | 19a7b4a | 2005-10-18 12:03:35 -0400 | [diff] [blame] | 2295 | return; |
| 2296 | } |
| 2297 | |
| 2298 | if (rport->port_state != FC_PORTSTATE_BLOCKED) { |
| 2299 | spin_unlock_irqrestore(shost->host_lock, flags); |
| 2300 | dev_printk(KERN_ERR, &rport->dev, |
| 2301 | "blocked FC remote port time out: leaving target alone\n"); |
| 2302 | return; |
| 2303 | } |
| 2304 | |
James Smart | aedf349 | 2006-04-10 10:14:05 -0400 | [diff] [blame] | 2305 | if (fc_host->tgtid_bind_type == FC_TGTID_BIND_NONE) { |
| 2306 | list_del(&rport->peers); |
| 2307 | rport->port_state = FC_PORTSTATE_DELETED; |
James.Smart@Emulex.Com | 19a7b4a | 2005-10-18 12:03:35 -0400 | [diff] [blame] | 2308 | dev_printk(KERN_ERR, &rport->dev, |
| 2309 | "blocked FC remote port time out: removing target\n"); |
James Smart | aedf349 | 2006-04-10 10:14:05 -0400 | [diff] [blame] | 2310 | fc_queue_work(shost, &rport->rport_delete_work); |
| 2311 | spin_unlock_irqrestore(shost->host_lock, flags); |
James.Smart@Emulex.Com | 19a7b4a | 2005-10-18 12:03:35 -0400 | [diff] [blame] | 2312 | return; |
| 2313 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2314 | |
| 2315 | dev_printk(KERN_ERR, &rport->dev, |
James.Smart@Emulex.Com | 19a7b4a | 2005-10-18 12:03:35 -0400 | [diff] [blame] | 2316 | "blocked FC remote port time out: removing target and " |
| 2317 | "saving binding\n"); |
| 2318 | |
James Smart | aedf349 | 2006-04-10 10:14:05 -0400 | [diff] [blame] | 2319 | list_move_tail(&rport->peers, &fc_host->rport_bindings); |
James.Smart@Emulex.Com | 19a7b4a | 2005-10-18 12:03:35 -0400 | [diff] [blame] | 2320 | |
| 2321 | /* |
| 2322 | * Note: We do not remove or clear the hostdata area. This allows |
| 2323 | * host-specific target data to persist along with the |
| 2324 | * scsi_target_id. It's up to the host to manage it's hostdata area. |
| 2325 | */ |
| 2326 | |
| 2327 | /* |
| 2328 | * Reinitialize port attributes that may change if the port comes back. |
| 2329 | */ |
| 2330 | rport->maxframe_size = -1; |
| 2331 | rport->supported_classes = FC_COS_UNSPECIFIED; |
| 2332 | rport->roles = FC_RPORT_ROLE_UNKNOWN; |
James Smart | aedf349 | 2006-04-10 10:14:05 -0400 | [diff] [blame] | 2333 | rport->port_state = FC_PORTSTATE_NOTPRESENT; |
James.Smart@Emulex.Com | 19a7b4a | 2005-10-18 12:03:35 -0400 | [diff] [blame] | 2334 | |
| 2335 | /* remove the identifiers that aren't used in the consisting binding */ |
James Smart | aedf349 | 2006-04-10 10:14:05 -0400 | [diff] [blame] | 2336 | switch (fc_host->tgtid_bind_type) { |
James.Smart@Emulex.Com | 19a7b4a | 2005-10-18 12:03:35 -0400 | [diff] [blame] | 2337 | case FC_TGTID_BIND_BY_WWPN: |
| 2338 | rport->node_name = -1; |
| 2339 | rport->port_id = -1; |
| 2340 | break; |
| 2341 | case FC_TGTID_BIND_BY_WWNN: |
| 2342 | rport->port_name = -1; |
| 2343 | rport->port_id = -1; |
| 2344 | break; |
| 2345 | case FC_TGTID_BIND_BY_ID: |
| 2346 | rport->node_name = -1; |
| 2347 | rport->port_name = -1; |
| 2348 | break; |
| 2349 | case FC_TGTID_BIND_NONE: /* to keep compiler happy */ |
| 2350 | break; |
| 2351 | } |
| 2352 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2353 | /* |
| 2354 | * As this only occurs if the remote port (scsi target) |
| 2355 | * went away and didn't come back - we'll remove |
| 2356 | * all attached scsi devices. |
| 2357 | */ |
James.Smart@Emulex.Com | 42e3314 | 2005-12-15 09:56:22 -0500 | [diff] [blame] | 2358 | spin_unlock_irqrestore(shost->host_lock, flags); |
James Smart | a0785ed | 2006-05-11 13:27:09 -0400 | [diff] [blame] | 2359 | |
| 2360 | scsi_target_unblock(&rport->dev); |
| 2361 | fc_queue_work(shost, &rport->stgt_delete_work); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2362 | } |
| 2363 | |
| 2364 | /** |
James Smart | 0f29b96 | 2006-08-18 17:33:29 -0400 | [diff] [blame] | 2365 | * fc_timeout_fail_rport_io - Timeout handler for a fast io failing on a |
| 2366 | * disconnected SCSI target. |
| 2367 | * |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 2368 | * @work: rport to terminate io on. |
James Smart | 0f29b96 | 2006-08-18 17:33:29 -0400 | [diff] [blame] | 2369 | * |
| 2370 | * Notes: Only requests the failure of the io, not that all are flushed |
| 2371 | * prior to returning. |
| 2372 | **/ |
| 2373 | static void |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 2374 | fc_timeout_fail_rport_io(struct work_struct *work) |
James Smart | 0f29b96 | 2006-08-18 17:33:29 -0400 | [diff] [blame] | 2375 | { |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 2376 | struct fc_rport *rport = |
| 2377 | container_of(work, struct fc_rport, fail_io_work.work); |
James Smart | 0f29b96 | 2006-08-18 17:33:29 -0400 | [diff] [blame] | 2378 | struct Scsi_Host *shost = rport_to_shost(rport); |
| 2379 | struct fc_internal *i = to_fc_internal(shost->transportt); |
| 2380 | |
| 2381 | if (rport->port_state != FC_PORTSTATE_BLOCKED) |
| 2382 | return; |
| 2383 | |
| 2384 | i->f->terminate_rport_io(rport); |
| 2385 | } |
| 2386 | |
| 2387 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2388 | * fc_scsi_scan_rport - called to perform a scsi scan on a remote port. |
James.Smart@Emulex.Com | 19a7b4a | 2005-10-18 12:03:35 -0400 | [diff] [blame] | 2389 | * |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 2390 | * @work: remote port to be scanned. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2391 | **/ |
| 2392 | static void |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 2393 | fc_scsi_scan_rport(struct work_struct *work) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2394 | { |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 2395 | struct fc_rport *rport = |
| 2396 | container_of(work, struct fc_rport, scan_work); |
James Smart | aedf349 | 2006-04-10 10:14:05 -0400 | [diff] [blame] | 2397 | struct Scsi_Host *shost = rport_to_shost(rport); |
James.Smart@Emulex.Com | 42e3314 | 2005-12-15 09:56:22 -0500 | [diff] [blame] | 2398 | unsigned long flags; |
| 2399 | |
James Smart | aedf349 | 2006-04-10 10:14:05 -0400 | [diff] [blame] | 2400 | if ((rport->port_state == FC_PORTSTATE_ONLINE) && |
| 2401 | (rport->roles & FC_RPORT_ROLE_FCP_TARGET)) { |
James Smart | aedf349 | 2006-04-10 10:14:05 -0400 | [diff] [blame] | 2402 | scsi_scan_target(&rport->dev, rport->channel, |
| 2403 | rport->scsi_target_id, SCAN_WILD_CARD, 1); |
James.Smart@Emulex.Com | 42e3314 | 2005-12-15 09:56:22 -0500 | [diff] [blame] | 2404 | } |
James Smart | aedf349 | 2006-04-10 10:14:05 -0400 | [diff] [blame] | 2405 | |
| 2406 | spin_lock_irqsave(shost->host_lock, flags); |
| 2407 | rport->flags &= ~FC_RPORT_SCAN_PENDING; |
James.Smart@Emulex.Com | 42e3314 | 2005-12-15 09:56:22 -0500 | [diff] [blame] | 2408 | spin_unlock_irqrestore(shost->host_lock, flags); |
| 2409 | } |
| 2410 | |
| 2411 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2412 | MODULE_AUTHOR("Martin Hicks"); |
| 2413 | MODULE_DESCRIPTION("FC Transport Attributes"); |
| 2414 | MODULE_LICENSE("GPL"); |
| 2415 | |
| 2416 | module_init(fc_transport_init); |
| 2417 | module_exit(fc_transport_exit); |