blob: 24eaaf66af710042d9a96c71c93b5930721a5a9e [file] [log] [blame]
James Smart9ef3e4a2007-05-24 19:04:44 -04001/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002 * 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 *
James Smarta53eb5e2007-04-27 12:41:09 -040022 * Copyright (C) 2004-2007 James Smart, Emulex Corporation
Linus Torvalds1da177e2005-04-16 15:20:36 -070023 * Rewrite for host, target, device, and remote port attributes,
24 * statistics, and service functions...
James Smart9ef3e4a2007-05-24 19:04:44 -040025 * Add vports, etc
Linus Torvalds1da177e2005-04-16 15:20:36 -070026 *
27 */
28#include <linux/module.h>
29#include <linux/init.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090030#include <linux/slab.h>
Christof Schmitt65d430f2009-10-30 17:59:29 +010031#include <linux/delay.h>
Andy Shevchenkoecc30992010-08-10 18:01:27 -070032#include <linux/kernel.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070033#include <scsi/scsi_device.h>
34#include <scsi/scsi_host.h>
35#include <scsi/scsi_transport.h>
36#include <scsi/scsi_transport_fc.h>
James Smartc829c392006-03-13 08:28:57 -050037#include <scsi/scsi_cmnd.h>
James Smart84314fd2006-08-18 17:30:09 -040038#include <net/netlink.h>
39#include <scsi/scsi_netlink_fc.h>
James Smart9e4f5e22009-03-26 13:33:19 -040040#include <scsi/scsi_bsg_fc.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070041#include "scsi_priv.h"
42
James Smartaedf3492006-04-10 10:14:05 -040043static int fc_queue_work(struct Scsi_Host *, struct work_struct *);
James Smart9ef3e4a2007-05-24 19:04:44 -040044static void fc_vport_sched_delete(struct work_struct *work);
Andrew Vasqueza30c3f62008-07-18 08:32:52 -070045static int fc_vport_setup(struct Scsi_Host *shost, int channel,
James Smarta53eb5e2007-04-27 12:41:09 -040046 struct device *pdev, struct fc_vport_identifiers *ids,
47 struct fc_vport **vport);
James Smart9e4f5e22009-03-26 13:33:19 -040048static int fc_bsg_hostadd(struct Scsi_Host *, struct fc_host_attrs *);
49static int fc_bsg_rportadd(struct Scsi_Host *, struct fc_rport *);
50static void fc_bsg_remove(struct request_queue *);
51static void fc_bsg_goose_queue(struct fc_rport *);
James Smarta53eb5e2007-04-27 12:41:09 -040052
53/*
Mike Christie43ca9102010-09-15 16:52:32 -050054 * Module Parameters
55 */
56
57/*
58 * dev_loss_tmo: the default number of seconds that the FC transport
59 * should insulate the loss of a remote port.
60 * The maximum will be capped by the value of SCSI_DEVICE_BLOCK_MAX_TIMEOUT.
61 */
62static unsigned int fc_dev_loss_tmo = 60; /* seconds */
63
64module_param_named(dev_loss_tmo, fc_dev_loss_tmo, uint, S_IRUGO|S_IWUSR);
65MODULE_PARM_DESC(dev_loss_tmo,
66 "Maximum number of seconds that the FC transport should"
67 " insulate the loss of a remote port. Once this value is"
68 " exceeded, the scsi target is removed. Value should be"
69 " between 1 and SCSI_DEVICE_BLOCK_MAX_TIMEOUT if"
70 " fast_io_fail_tmo is not set.");
71
72/*
Linus Torvalds1da177e2005-04-16 15:20:36 -070073 * Redefine so that we can have same named attributes in the
74 * sdev/starget/host objects.
75 */
Tony Jonesee959b02008-02-22 00:13:36 +010076#define FC_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \
77struct device_attribute device_attr_##_prefix##_##_name = \
Linus Torvalds1da177e2005-04-16 15:20:36 -070078 __ATTR(_name,_mode,_show,_store)
79
80#define fc_enum_name_search(title, table_type, table) \
81static const char *get_fc_##title##_name(enum table_type table_key) \
82{ \
83 int i; \
84 char *name = NULL; \
85 \
Tobias Klauser6391a112006-06-08 22:23:48 -070086 for (i = 0; i < ARRAY_SIZE(table); i++) { \
Linus Torvalds1da177e2005-04-16 15:20:36 -070087 if (table[i].value == table_key) { \
88 name = table[i].name; \
89 break; \
90 } \
91 } \
92 return name; \
93}
94
95#define fc_enum_name_match(title, table_type, table) \
96static int get_fc_##title##_match(const char *table_key, \
97 enum table_type *value) \
98{ \
99 int i; \
100 \
Tobias Klauser6391a112006-06-08 22:23:48 -0700101 for (i = 0; i < ARRAY_SIZE(table); i++) { \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102 if (strncmp(table_key, table[i].name, \
103 table[i].matchlen) == 0) { \
104 *value = table[i].value; \
105 return 0; /* success */ \
106 } \
107 } \
108 return 1; /* failure */ \
109}
110
111
112/* Convert fc_port_type values to ascii string name */
113static struct {
114 enum fc_port_type value;
115 char *name;
116} fc_port_type_names[] = {
117 { FC_PORTTYPE_UNKNOWN, "Unknown" },
118 { FC_PORTTYPE_OTHER, "Other" },
119 { FC_PORTTYPE_NOTPRESENT, "Not Present" },
120 { FC_PORTTYPE_NPORT, "NPort (fabric via point-to-point)" },
121 { FC_PORTTYPE_NLPORT, "NLPort (fabric via loop)" },
122 { FC_PORTTYPE_LPORT, "LPort (private loop)" },
Christof Schmitt951948a2009-01-15 16:51:48 +0100123 { FC_PORTTYPE_PTP, "Point-To-Point (direct nport connection)" },
James Smarta53eb5e2007-04-27 12:41:09 -0400124 { FC_PORTTYPE_NPIV, "NPIV VPORT" },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125};
126fc_enum_name_search(port_type, fc_port_type, fc_port_type_names)
127#define FC_PORTTYPE_MAX_NAMELEN 50
128
James Smarta53eb5e2007-04-27 12:41:09 -0400129/* Reuse fc_port_type enum function for vport_type */
130#define get_fc_vport_type_name get_fc_port_type_name
131
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132
James Smart84314fd2006-08-18 17:30:09 -0400133/* Convert fc_host_event_code values to ascii string name */
134static const struct {
135 enum fc_host_event_code value;
136 char *name;
137} fc_host_event_code_names[] = {
138 { FCH_EVT_LIP, "lip" },
139 { FCH_EVT_LINKUP, "link_up" },
140 { FCH_EVT_LINKDOWN, "link_down" },
141 { FCH_EVT_LIPRESET, "lip_reset" },
142 { FCH_EVT_RSCN, "rscn" },
143 { FCH_EVT_ADAPTER_CHANGE, "adapter_chg" },
144 { FCH_EVT_PORT_UNKNOWN, "port_unknown" },
145 { FCH_EVT_PORT_ONLINE, "port_online" },
146 { FCH_EVT_PORT_OFFLINE, "port_offline" },
147 { FCH_EVT_PORT_FABRIC, "port_fabric" },
148 { FCH_EVT_LINK_UNKNOWN, "link_unknown" },
149 { FCH_EVT_VENDOR_UNIQUE, "vendor_unique" },
150};
151fc_enum_name_search(host_event_code, fc_host_event_code,
152 fc_host_event_code_names)
153#define FC_HOST_EVENT_CODE_MAX_NAMELEN 30
154
155
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156/* Convert fc_port_state values to ascii string name */
157static struct {
158 enum fc_port_state value;
159 char *name;
160} fc_port_state_names[] = {
161 { FC_PORTSTATE_UNKNOWN, "Unknown" },
162 { FC_PORTSTATE_NOTPRESENT, "Not Present" },
163 { FC_PORTSTATE_ONLINE, "Online" },
164 { FC_PORTSTATE_OFFLINE, "Offline" },
165 { FC_PORTSTATE_BLOCKED, "Blocked" },
166 { FC_PORTSTATE_BYPASSED, "Bypassed" },
167 { FC_PORTSTATE_DIAGNOSTICS, "Diagnostics" },
168 { FC_PORTSTATE_LINKDOWN, "Linkdown" },
169 { FC_PORTSTATE_ERROR, "Error" },
170 { FC_PORTSTATE_LOOPBACK, "Loopback" },
James.Smart@Emulex.Com42e33142005-12-15 09:56:22 -0500171 { FC_PORTSTATE_DELETED, "Deleted" },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172};
173fc_enum_name_search(port_state, fc_port_state, fc_port_state_names)
174#define FC_PORTSTATE_MAX_NAMELEN 20
175
176
James Smarta53eb5e2007-04-27 12:41:09 -0400177/* Convert fc_vport_state values to ascii string name */
178static struct {
179 enum fc_vport_state value;
180 char *name;
181} fc_vport_state_names[] = {
182 { FC_VPORT_UNKNOWN, "Unknown" },
183 { FC_VPORT_ACTIVE, "Active" },
184 { FC_VPORT_DISABLED, "Disabled" },
185 { FC_VPORT_LINKDOWN, "Linkdown" },
186 { FC_VPORT_INITIALIZING, "Initializing" },
187 { FC_VPORT_NO_FABRIC_SUPP, "No Fabric Support" },
188 { FC_VPORT_NO_FABRIC_RSCS, "No Fabric Resources" },
189 { FC_VPORT_FABRIC_LOGOUT, "Fabric Logout" },
190 { FC_VPORT_FABRIC_REJ_WWN, "Fabric Rejected WWN" },
191 { FC_VPORT_FAILED, "VPort Failed" },
192};
193fc_enum_name_search(vport_state, fc_vport_state, fc_vport_state_names)
194#define FC_VPORTSTATE_MAX_NAMELEN 24
195
196/* Reuse fc_vport_state enum function for vport_last_state */
197#define get_fc_vport_last_state_name get_fc_vport_state_name
198
199
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200/* Convert fc_tgtid_binding_type values to ascii string name */
Arjan van de Ven0ad78202005-11-28 16:22:25 +0100201static const struct {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202 enum fc_tgtid_binding_type value;
203 char *name;
204 int matchlen;
205} fc_tgtid_binding_type_names[] = {
206 { FC_TGTID_BIND_NONE, "none", 4 },
207 { FC_TGTID_BIND_BY_WWPN, "wwpn (World Wide Port Name)", 4 },
208 { FC_TGTID_BIND_BY_WWNN, "wwnn (World Wide Node Name)", 4 },
209 { FC_TGTID_BIND_BY_ID, "port_id (FC Address)", 7 },
210};
211fc_enum_name_search(tgtid_bind_type, fc_tgtid_binding_type,
212 fc_tgtid_binding_type_names)
213fc_enum_name_match(tgtid_bind_type, fc_tgtid_binding_type,
214 fc_tgtid_binding_type_names)
215#define FC_BINDTYPE_MAX_NAMELEN 30
216
217
218#define fc_bitfield_name_search(title, table) \
219static ssize_t \
220get_fc_##title##_names(u32 table_key, char *buf) \
221{ \
222 char *prefix = ""; \
223 ssize_t len = 0; \
224 int i; \
225 \
Tobias Klauser6391a112006-06-08 22:23:48 -0700226 for (i = 0; i < ARRAY_SIZE(table); i++) { \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227 if (table[i].value & table_key) { \
228 len += sprintf(buf + len, "%s%s", \
229 prefix, table[i].name); \
230 prefix = ", "; \
231 } \
232 } \
233 len += sprintf(buf + len, "\n"); \
234 return len; \
235}
236
237
238/* Convert FC_COS bit values to ascii string name */
Arjan van de Ven0ad78202005-11-28 16:22:25 +0100239static const struct {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240 u32 value;
241 char *name;
242} fc_cos_names[] = {
243 { FC_COS_CLASS1, "Class 1" },
244 { FC_COS_CLASS2, "Class 2" },
245 { FC_COS_CLASS3, "Class 3" },
246 { FC_COS_CLASS4, "Class 4" },
247 { FC_COS_CLASS6, "Class 6" },
248};
249fc_bitfield_name_search(cos, fc_cos_names)
250
251
252/* Convert FC_PORTSPEED bit values to ascii string name */
Arjan van de Ven0ad78202005-11-28 16:22:25 +0100253static const struct {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700254 u32 value;
255 char *name;
256} fc_port_speed_names[] = {
257 { FC_PORTSPEED_1GBIT, "1 Gbit" },
258 { FC_PORTSPEED_2GBIT, "2 Gbit" },
259 { FC_PORTSPEED_4GBIT, "4 Gbit" },
260 { FC_PORTSPEED_10GBIT, "10 Gbit" },
James Smartc3d23502007-03-12 14:16:35 -0500261 { FC_PORTSPEED_8GBIT, "8 Gbit" },
262 { FC_PORTSPEED_16GBIT, "16 Gbit" },
Chad Dupuis624f28b2014-02-26 04:15:05 -0500263 { FC_PORTSPEED_32GBIT, "32 Gbit" },
Dick Kennedyc21a2c12014-06-13 16:40:36 +0000264 { FC_PORTSPEED_20GBIT, "20 Gbit" },
265 { FC_PORTSPEED_40GBIT, "40 Gbit" },
266 { FC_PORTSPEED_50GBIT, "50 Gbit" },
267 { FC_PORTSPEED_100GBIT, "100 Gbit" },
James Smartc749e6b2015-04-02 15:50:52 -0400268 { FC_PORTSPEED_25GBIT, "25 Gbit" },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269 { FC_PORTSPEED_NOT_NEGOTIATED, "Not Negotiated" },
270};
271fc_bitfield_name_search(port_speed, fc_port_speed_names)
272
273
274static int
275show_fc_fc4s (char *buf, u8 *fc4_list)
276{
277 int i, len=0;
278
279 for (i = 0; i < FC_FC4_LIST_SIZE; i++, fc4_list++)
280 len += sprintf(buf + len , "0x%02x ", *fc4_list);
281 len += sprintf(buf + len, "\n");
282 return len;
283}
284
285
James Smarta53eb5e2007-04-27 12:41:09 -0400286/* Convert FC_PORT_ROLE bit values to ascii string name */
Arjan van de Ven0ad78202005-11-28 16:22:25 +0100287static const struct {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288 u32 value;
289 char *name;
James Smarta53eb5e2007-04-27 12:41:09 -0400290} fc_port_role_names[] = {
291 { FC_PORT_ROLE_FCP_TARGET, "FCP Target" },
292 { FC_PORT_ROLE_FCP_INITIATOR, "FCP Initiator" },
293 { FC_PORT_ROLE_IP_PORT, "IP Port" },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294};
James Smarta53eb5e2007-04-27 12:41:09 -0400295fc_bitfield_name_search(port_roles, fc_port_role_names)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296
297/*
298 * Define roles that are specific to port_id. Values are relative to ROLE_MASK.
299 */
300#define FC_WELLKNOWN_PORTID_MASK 0xfffff0
301#define FC_WELLKNOWN_ROLE_MASK 0x00000f
302#define FC_FPORT_PORTID 0x00000e
303#define FC_FABCTLR_PORTID 0x00000d
304#define FC_DIRSRVR_PORTID 0x00000c
305#define FC_TIMESRVR_PORTID 0x00000b
306#define FC_MGMTSRVR_PORTID 0x00000a
307
308
David Howellsc4028952006-11-22 14:57:56 +0000309static void fc_timeout_deleted_rport(struct work_struct *work);
310static void fc_timeout_fail_rport_io(struct work_struct *work);
311static void fc_scsi_scan_rport(struct work_struct *work);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312
313/*
314 * Attribute counts pre object type...
315 * Increase these values if you add attributes
316 */
317#define FC_STARGET_NUM_ATTRS 3
James Smart0f29b962006-08-18 17:33:29 -0400318#define FC_RPORT_NUM_ATTRS 10
James Smarta53eb5e2007-04-27 12:41:09 -0400319#define FC_VPORT_NUM_ATTRS 9
Neerav Parikhbb8ef582012-01-22 17:29:50 -0800320#define FC_HOST_NUM_ATTRS 29
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321
322struct fc_internal {
323 struct scsi_transport_template t;
324 struct fc_function_template *f;
325
326 /*
327 * For attributes : each object has :
328 * An array of the actual attributes structures
329 * An array of null-terminated pointers to the attribute
330 * structures - used for mid-layer interaction.
331 *
332 * The attribute containers for the starget and host are are
333 * part of the midlayer. As the remote port is specific to the
334 * fc transport, we must provide the attribute container.
335 */
Tony Jonesee959b02008-02-22 00:13:36 +0100336 struct device_attribute private_starget_attrs[
Linus Torvalds1da177e2005-04-16 15:20:36 -0700337 FC_STARGET_NUM_ATTRS];
Tony Jonesee959b02008-02-22 00:13:36 +0100338 struct device_attribute *starget_attrs[FC_STARGET_NUM_ATTRS + 1];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339
Tony Jonesee959b02008-02-22 00:13:36 +0100340 struct device_attribute private_host_attrs[FC_HOST_NUM_ATTRS];
341 struct device_attribute *host_attrs[FC_HOST_NUM_ATTRS + 1];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342
343 struct transport_container rport_attr_cont;
Tony Jonesee959b02008-02-22 00:13:36 +0100344 struct device_attribute private_rport_attrs[FC_RPORT_NUM_ATTRS];
345 struct device_attribute *rport_attrs[FC_RPORT_NUM_ATTRS + 1];
James Smarta53eb5e2007-04-27 12:41:09 -0400346
347 struct transport_container vport_attr_cont;
Tony Jonesee959b02008-02-22 00:13:36 +0100348 struct device_attribute private_vport_attrs[FC_VPORT_NUM_ATTRS];
349 struct device_attribute *vport_attrs[FC_VPORT_NUM_ATTRS + 1];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350};
351
352#define to_fc_internal(tmpl) container_of(tmpl, struct fc_internal, t)
353
James Bottomleyd0a7e572005-08-14 17:09:01 -0500354static int fc_target_setup(struct transport_container *tc, struct device *dev,
Tony Jonesee959b02008-02-22 00:13:36 +0100355 struct device *cdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700356{
357 struct scsi_target *starget = to_scsi_target(dev);
358 struct fc_rport *rport = starget_to_rport(starget);
359
360 /*
361 * if parent is remote port, use values from remote port.
362 * Otherwise, this host uses the fc_transport, but not the
363 * remote port interface. As such, initialize to known non-values.
364 */
365 if (rport) {
366 fc_starget_node_name(starget) = rport->node_name;
367 fc_starget_port_name(starget) = rport->port_name;
368 fc_starget_port_id(starget) = rport->port_id;
369 } else {
370 fc_starget_node_name(starget) = -1;
371 fc_starget_port_name(starget) = -1;
372 fc_starget_port_id(starget) = -1;
373 }
374
375 return 0;
376}
377
378static DECLARE_TRANSPORT_CLASS(fc_transport_class,
379 "fc_transport",
380 fc_target_setup,
381 NULL,
382 NULL);
383
James Bottomleyd0a7e572005-08-14 17:09:01 -0500384static int fc_host_setup(struct transport_container *tc, struct device *dev,
Tony Jonesee959b02008-02-22 00:13:36 +0100385 struct device *cdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386{
387 struct Scsi_Host *shost = dev_to_shost(dev);
James Smartaedf3492006-04-10 10:14:05 -0400388 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389
James Smart9ef3e4a2007-05-24 19:04:44 -0400390 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700391 * Set default values easily detected by the midlayer as
392 * failure cases. The scsi lldd is responsible for initializing
393 * all transport attributes to valid values per host.
394 */
James Smartaedf3492006-04-10 10:14:05 -0400395 fc_host->node_name = -1;
396 fc_host->port_name = -1;
397 fc_host->permanent_port_name = -1;
398 fc_host->supported_classes = FC_COS_UNSPECIFIED;
399 memset(fc_host->supported_fc4s, 0,
400 sizeof(fc_host->supported_fc4s));
James Smartaedf3492006-04-10 10:14:05 -0400401 fc_host->supported_speeds = FC_PORTSPEED_UNKNOWN;
402 fc_host->maxframe_size = -1;
James Smarta53eb5e2007-04-27 12:41:09 -0400403 fc_host->max_npiv_vports = 0;
James Smartaedf3492006-04-10 10:14:05 -0400404 memset(fc_host->serial_number, 0,
405 sizeof(fc_host->serial_number));
Neerav Parikhbb8ef582012-01-22 17:29:50 -0800406 memset(fc_host->manufacturer, 0,
407 sizeof(fc_host->manufacturer));
408 memset(fc_host->model, 0,
409 sizeof(fc_host->model));
410 memset(fc_host->model_description, 0,
411 sizeof(fc_host->model_description));
412 memset(fc_host->hardware_version, 0,
413 sizeof(fc_host->hardware_version));
414 memset(fc_host->driver_version, 0,
415 sizeof(fc_host->driver_version));
416 memset(fc_host->firmware_version, 0,
417 sizeof(fc_host->firmware_version));
418 memset(fc_host->optionrom_version, 0,
419 sizeof(fc_host->optionrom_version));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420
James Smartaedf3492006-04-10 10:14:05 -0400421 fc_host->port_id = -1;
422 fc_host->port_type = FC_PORTTYPE_UNKNOWN;
423 fc_host->port_state = FC_PORTSTATE_UNKNOWN;
424 memset(fc_host->active_fc4s, 0,
425 sizeof(fc_host->active_fc4s));
426 fc_host->speed = FC_PORTSPEED_UNKNOWN;
427 fc_host->fabric_name = -1;
James Smartb8d08212006-08-17 08:00:43 -0400428 memset(fc_host->symbolic_name, 0, sizeof(fc_host->symbolic_name));
429 memset(fc_host->system_hostname, 0, sizeof(fc_host->system_hostname));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700430
James Smartaedf3492006-04-10 10:14:05 -0400431 fc_host->tgtid_bind_type = FC_TGTID_BIND_BY_WWPN;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700432
James Smartaedf3492006-04-10 10:14:05 -0400433 INIT_LIST_HEAD(&fc_host->rports);
434 INIT_LIST_HEAD(&fc_host->rport_bindings);
James Smarta53eb5e2007-04-27 12:41:09 -0400435 INIT_LIST_HEAD(&fc_host->vports);
James Smartaedf3492006-04-10 10:14:05 -0400436 fc_host->next_rport_number = 0;
437 fc_host->next_target_id = 0;
James Smarta53eb5e2007-04-27 12:41:09 -0400438 fc_host->next_vport_number = 0;
439 fc_host->npiv_vports_inuse = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700440
Kay Sieversaab0de22008-05-02 06:02:41 +0200441 snprintf(fc_host->work_q_name, sizeof(fc_host->work_q_name),
442 "fc_wq_%d", shost->host_no);
Kees Cookd8537542013-07-03 15:04:57 -0700443 fc_host->work_q = alloc_workqueue("%s", 0, 0, fc_host->work_q_name);
James Smartaedf3492006-04-10 10:14:05 -0400444 if (!fc_host->work_q)
445 return -ENOMEM;
446
Mike Christie43ca9102010-09-15 16:52:32 -0500447 fc_host->dev_loss_tmo = fc_dev_loss_tmo;
Kay Sieversaab0de22008-05-02 06:02:41 +0200448 snprintf(fc_host->devloss_work_q_name,
449 sizeof(fc_host->devloss_work_q_name),
450 "fc_dl_%d", shost->host_no);
Kees Cookd8537542013-07-03 15:04:57 -0700451 fc_host->devloss_work_q = alloc_workqueue("%s", 0, 0,
452 fc_host->devloss_work_q_name);
James Smartaedf3492006-04-10 10:14:05 -0400453 if (!fc_host->devloss_work_q) {
454 destroy_workqueue(fc_host->work_q);
455 fc_host->work_q = NULL;
456 return -ENOMEM;
457 }
458
James Smart9e4f5e22009-03-26 13:33:19 -0400459 fc_bsg_hostadd(shost, fc_host);
460 /* ignore any bsg add error - we just can't do sgio */
461
462 return 0;
463}
464
465static int fc_host_remove(struct transport_container *tc, struct device *dev,
466 struct device *cdev)
467{
468 struct Scsi_Host *shost = dev_to_shost(dev);
469 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
470
471 fc_bsg_remove(fc_host->rqst_q);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472 return 0;
473}
474
475static DECLARE_TRANSPORT_CLASS(fc_host_class,
476 "fc_host",
477 fc_host_setup,
James Smart9e4f5e22009-03-26 13:33:19 -0400478 fc_host_remove,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700479 NULL);
480
481/*
482 * Setup and Remove actions for remote ports are handled
483 * in the service functions below.
484 */
485static DECLARE_TRANSPORT_CLASS(fc_rport_class,
486 "fc_remote_ports",
487 NULL,
488 NULL,
489 NULL);
490
491/*
James Smarta53eb5e2007-04-27 12:41:09 -0400492 * Setup and Remove actions for virtual ports are handled
493 * in the service functions below.
494 */
495static DECLARE_TRANSPORT_CLASS(fc_vport_class,
496 "fc_vports",
497 NULL,
498 NULL,
499 NULL);
500
501/*
James Smart84314fd2006-08-18 17:30:09 -0400502 * Netlink Infrastructure
Rob Landleyeb448202007-11-03 13:30:39 -0500503 */
James Smart84314fd2006-08-18 17:30:09 -0400504
505static atomic_t fc_event_seq;
506
507/**
508 * fc_get_event_number - Obtain the next sequential FC event number
509 *
510 * Notes:
Rob Landleyeb448202007-11-03 13:30:39 -0500511 * We could have inlined this, but it would have required fc_event_seq to
James Smart84314fd2006-08-18 17:30:09 -0400512 * be exposed. For now, live with the subroutine call.
513 * Atomic used to avoid lock/unlock...
Rob Landleyeb448202007-11-03 13:30:39 -0500514 */
James Smart84314fd2006-08-18 17:30:09 -0400515u32
516fc_get_event_number(void)
517{
518 return atomic_add_return(1, &fc_event_seq);
519}
520EXPORT_SYMBOL(fc_get_event_number);
521
522
523/**
524 * fc_host_post_event - called to post an even on an fc_host.
James Smart84314fd2006-08-18 17:30:09 -0400525 * @shost: host the event occurred on
526 * @event_number: fc event number obtained from get_fc_event_number()
527 * @event_code: fc_host event being posted
528 * @event_data: 32bits of data for the event being posted
529 *
530 * Notes:
531 * This routine assumes no locks are held on entry.
Rob Landleyeb448202007-11-03 13:30:39 -0500532 */
James Smart84314fd2006-08-18 17:30:09 -0400533void
534fc_host_post_event(struct Scsi_Host *shost, u32 event_number,
535 enum fc_host_event_code event_code, u32 event_data)
536{
537 struct sk_buff *skb;
538 struct nlmsghdr *nlh;
539 struct fc_nl_event *event;
540 const char *name;
Hong zhi guoe07ebea2013-03-27 06:53:15 +0000541 u32 len;
James Smart84314fd2006-08-18 17:30:09 -0400542 int err;
543
544 if (!scsi_nl_sock) {
545 err = -ENOENT;
546 goto send_fail;
547 }
548
549 len = FC_NL_MSGALIGN(sizeof(*event));
James Smart84314fd2006-08-18 17:30:09 -0400550
Hong zhi guoe07ebea2013-03-27 06:53:15 +0000551 skb = nlmsg_new(len, GFP_KERNEL);
James Smart84314fd2006-08-18 17:30:09 -0400552 if (!skb) {
553 err = -ENOBUFS;
554 goto send_fail;
555 }
556
Hong zhi guoe07ebea2013-03-27 06:53:15 +0000557 nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, len, 0);
James Smart84314fd2006-08-18 17:30:09 -0400558 if (!nlh) {
559 err = -ENOBUFS;
560 goto send_fail_skb;
561 }
Hong zhi guoe07ebea2013-03-27 06:53:15 +0000562 event = nlmsg_data(nlh);
James Smart84314fd2006-08-18 17:30:09 -0400563
564 INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC,
565 FC_NL_ASYNC_EVENT, len);
566 event->seconds = get_seconds();
567 event->vendor_id = 0;
568 event->host_no = shost->host_no;
569 event->event_datalen = sizeof(u32); /* bytes */
570 event->event_num = event_number;
571 event->event_code = event_code;
572 event->event_data = event_data;
573
Pablo Neira Ayusoff491a72009-02-05 23:56:36 -0800574 nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS,
575 GFP_KERNEL);
James Smart84314fd2006-08-18 17:30:09 -0400576 return;
577
578send_fail_skb:
579 kfree_skb(skb);
580send_fail:
581 name = get_fc_host_event_code_name(event_code);
582 printk(KERN_WARNING
583 "%s: Dropped Event : host %d %s data 0x%08x - err %d\n",
Harvey Harrisoncadbd4a2008-07-03 23:47:27 -0700584 __func__, shost->host_no,
James Smart84314fd2006-08-18 17:30:09 -0400585 (name) ? name : "<unknown>", event_data, err);
586 return;
587}
588EXPORT_SYMBOL(fc_host_post_event);
589
590
591/**
Rob Landleyeb448202007-11-03 13:30:39 -0500592 * fc_host_post_vendor_event - called to post a vendor unique event on an fc_host
James Smart84314fd2006-08-18 17:30:09 -0400593 * @shost: host the event occurred on
594 * @event_number: fc event number obtained from get_fc_event_number()
595 * @data_len: amount, in bytes, of vendor unique data
596 * @data_buf: pointer to vendor unique data
Rob Landleyeb448202007-11-03 13:30:39 -0500597 * @vendor_id: Vendor id
James Smart84314fd2006-08-18 17:30:09 -0400598 *
599 * Notes:
600 * This routine assumes no locks are held on entry.
Rob Landleyeb448202007-11-03 13:30:39 -0500601 */
James Smart84314fd2006-08-18 17:30:09 -0400602void
603fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number,
James Smartf14e2e22006-08-22 09:55:23 -0400604 u32 data_len, char * data_buf, u64 vendor_id)
James Smart84314fd2006-08-18 17:30:09 -0400605{
606 struct sk_buff *skb;
607 struct nlmsghdr *nlh;
608 struct fc_nl_event *event;
Hong zhi guoe07ebea2013-03-27 06:53:15 +0000609 u32 len;
James Smart84314fd2006-08-18 17:30:09 -0400610 int err;
611
612 if (!scsi_nl_sock) {
613 err = -ENOENT;
614 goto send_vendor_fail;
615 }
616
617 len = FC_NL_MSGALIGN(sizeof(*event) + data_len);
James Smart84314fd2006-08-18 17:30:09 -0400618
Hong zhi guoe07ebea2013-03-27 06:53:15 +0000619 skb = nlmsg_new(len, GFP_KERNEL);
James Smart84314fd2006-08-18 17:30:09 -0400620 if (!skb) {
621 err = -ENOBUFS;
622 goto send_vendor_fail;
623 }
624
Hong zhi guoe07ebea2013-03-27 06:53:15 +0000625 nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, len, 0);
James Smart84314fd2006-08-18 17:30:09 -0400626 if (!nlh) {
627 err = -ENOBUFS;
628 goto send_vendor_fail_skb;
629 }
Hong zhi guoe07ebea2013-03-27 06:53:15 +0000630 event = nlmsg_data(nlh);
James Smart84314fd2006-08-18 17:30:09 -0400631
632 INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC,
633 FC_NL_ASYNC_EVENT, len);
634 event->seconds = get_seconds();
635 event->vendor_id = vendor_id;
636 event->host_no = shost->host_no;
637 event->event_datalen = data_len; /* bytes */
638 event->event_num = event_number;
639 event->event_code = FCH_EVT_VENDOR_UNIQUE;
640 memcpy(&event->event_data, data_buf, data_len);
641
Pablo Neira Ayusoff491a72009-02-05 23:56:36 -0800642 nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS,
643 GFP_KERNEL);
James Smart84314fd2006-08-18 17:30:09 -0400644 return;
645
646send_vendor_fail_skb:
647 kfree_skb(skb);
648send_vendor_fail:
649 printk(KERN_WARNING
650 "%s: Dropped Event : host %d vendor_unique - err %d\n",
Harvey Harrisoncadbd4a2008-07-03 23:47:27 -0700651 __func__, shost->host_no, err);
James Smart84314fd2006-08-18 17:30:09 -0400652 return;
653}
654EXPORT_SYMBOL(fc_host_post_vendor_event);
655
656
Linus Torvalds1da177e2005-04-16 15:20:36 -0700657
658static __init int fc_transport_init(void)
659{
James Smart84314fd2006-08-18 17:30:09 -0400660 int error;
661
662 atomic_set(&fc_event_seq, 0);
663
664 error = transport_class_register(&fc_host_class);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700665 if (error)
666 return error;
James Smarta53eb5e2007-04-27 12:41:09 -0400667 error = transport_class_register(&fc_vport_class);
668 if (error)
Mike Christie48de68a2009-11-17 21:25:16 -0600669 goto unreg_host_class;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700670 error = transport_class_register(&fc_rport_class);
671 if (error)
Mike Christie48de68a2009-11-17 21:25:16 -0600672 goto unreg_vport_class;
673 error = transport_class_register(&fc_transport_class);
674 if (error)
675 goto unreg_rport_class;
676 return 0;
677
678unreg_rport_class:
679 transport_class_unregister(&fc_rport_class);
680unreg_vport_class:
681 transport_class_unregister(&fc_vport_class);
682unreg_host_class:
683 transport_class_unregister(&fc_host_class);
684 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700685}
686
687static void __exit fc_transport_exit(void)
688{
689 transport_class_unregister(&fc_transport_class);
690 transport_class_unregister(&fc_rport_class);
691 transport_class_unregister(&fc_host_class);
James Smarta53eb5e2007-04-27 12:41:09 -0400692 transport_class_unregister(&fc_vport_class);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700693}
694
695/*
696 * FC Remote Port Attribute Management
697 */
698
699#define fc_rport_show_function(field, format_string, sz, cast) \
700static ssize_t \
Tony Jonesee959b02008-02-22 00:13:36 +0100701show_fc_rport_##field (struct device *dev, \
702 struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700703{ \
Tony Jonesee959b02008-02-22 00:13:36 +0100704 struct fc_rport *rport = transport_class_to_rport(dev); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700705 struct Scsi_Host *shost = rport_to_shost(rport); \
706 struct fc_internal *i = to_fc_internal(shost->transportt); \
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -0400707 if ((i->f->get_rport_##field) && \
708 !((rport->port_state == FC_PORTSTATE_BLOCKED) || \
James.Smart@Emulex.Com42e33142005-12-15 09:56:22 -0500709 (rport->port_state == FC_PORTSTATE_DELETED) || \
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -0400710 (rport->port_state == FC_PORTSTATE_NOTPRESENT))) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700711 i->f->get_rport_##field(rport); \
712 return snprintf(buf, sz, format_string, cast rport->field); \
713}
714
715#define fc_rport_store_function(field) \
716static ssize_t \
Tony Jonesee959b02008-02-22 00:13:36 +0100717store_fc_rport_##field(struct device *dev, \
718 struct device_attribute *attr, \
719 const char *buf, size_t count) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700720{ \
721 int val; \
Tony Jonesee959b02008-02-22 00:13:36 +0100722 struct fc_rport *rport = transport_class_to_rport(dev); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700723 struct Scsi_Host *shost = rport_to_shost(rport); \
724 struct fc_internal *i = to_fc_internal(shost->transportt); \
James Smart0f29b962006-08-18 17:33:29 -0400725 char *cp; \
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -0400726 if ((rport->port_state == FC_PORTSTATE_BLOCKED) || \
James.Smart@Emulex.Com42e33142005-12-15 09:56:22 -0500727 (rport->port_state == FC_PORTSTATE_DELETED) || \
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -0400728 (rport->port_state == FC_PORTSTATE_NOTPRESENT)) \
729 return -EBUSY; \
James Smart0f29b962006-08-18 17:33:29 -0400730 val = simple_strtoul(buf, &cp, 0); \
731 if (*cp && (*cp != '\n')) \
732 return -EINVAL; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700733 i->f->set_rport_##field(rport, val); \
734 return count; \
735}
736
737#define fc_rport_rd_attr(field, format_string, sz) \
738 fc_rport_show_function(field, format_string, sz, ) \
Tony Jonesee959b02008-02-22 00:13:36 +0100739static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700740 show_fc_rport_##field, NULL)
741
742#define fc_rport_rd_attr_cast(field, format_string, sz, cast) \
743 fc_rport_show_function(field, format_string, sz, (cast)) \
Tony Jonesee959b02008-02-22 00:13:36 +0100744static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700745 show_fc_rport_##field, NULL)
746
747#define fc_rport_rw_attr(field, format_string, sz) \
748 fc_rport_show_function(field, format_string, sz, ) \
749 fc_rport_store_function(field) \
Tony Jonesee959b02008-02-22 00:13:36 +0100750static FC_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700751 show_fc_rport_##field, \
752 store_fc_rport_##field)
753
754
755#define fc_private_rport_show_function(field, format_string, sz, cast) \
756static ssize_t \
Tony Jonesee959b02008-02-22 00:13:36 +0100757show_fc_rport_##field (struct device *dev, \
758 struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700759{ \
Tony Jonesee959b02008-02-22 00:13:36 +0100760 struct fc_rport *rport = transport_class_to_rport(dev); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700761 return snprintf(buf, sz, format_string, cast rport->field); \
762}
763
764#define fc_private_rport_rd_attr(field, format_string, sz) \
765 fc_private_rport_show_function(field, format_string, sz, ) \
Tony Jonesee959b02008-02-22 00:13:36 +0100766static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700767 show_fc_rport_##field, NULL)
768
769#define fc_private_rport_rd_attr_cast(field, format_string, sz, cast) \
770 fc_private_rport_show_function(field, format_string, sz, (cast)) \
Tony Jonesee959b02008-02-22 00:13:36 +0100771static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700772 show_fc_rport_##field, NULL)
773
774
775#define fc_private_rport_rd_enum_attr(title, maxlen) \
776static ssize_t \
Tony Jonesee959b02008-02-22 00:13:36 +0100777show_fc_rport_##title (struct device *dev, \
778 struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700779{ \
Tony Jonesee959b02008-02-22 00:13:36 +0100780 struct fc_rport *rport = transport_class_to_rport(dev); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700781 const char *name; \
782 name = get_fc_##title##_name(rport->title); \
783 if (!name) \
784 return -EINVAL; \
785 return snprintf(buf, maxlen, "%s\n", name); \
786} \
Tony Jonesee959b02008-02-22 00:13:36 +0100787static FC_DEVICE_ATTR(rport, title, S_IRUGO, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700788 show_fc_rport_##title, NULL)
789
790
791#define SETUP_RPORT_ATTRIBUTE_RD(field) \
Tony Jonesee959b02008-02-22 00:13:36 +0100792 i->private_rport_attrs[count] = device_attr_rport_##field; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700793 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
794 i->private_rport_attrs[count].store = NULL; \
795 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
796 if (i->f->show_rport_##field) \
797 count++
798
799#define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field) \
Tony Jonesee959b02008-02-22 00:13:36 +0100800 i->private_rport_attrs[count] = device_attr_rport_##field; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700801 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
802 i->private_rport_attrs[count].store = NULL; \
803 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
804 count++
805
806#define SETUP_RPORT_ATTRIBUTE_RW(field) \
Tony Jonesee959b02008-02-22 00:13:36 +0100807 i->private_rport_attrs[count] = device_attr_rport_##field; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700808 if (!i->f->set_rport_##field) { \
809 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
810 i->private_rport_attrs[count].store = NULL; \
811 } \
812 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
813 if (i->f->show_rport_##field) \
814 count++
815
James Smart0f29b962006-08-18 17:33:29 -0400816#define SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(field) \
817{ \
Tony Jonesee959b02008-02-22 00:13:36 +0100818 i->private_rport_attrs[count] = device_attr_rport_##field; \
James Smart0f29b962006-08-18 17:33:29 -0400819 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
820 count++; \
821}
822
Linus Torvalds1da177e2005-04-16 15:20:36 -0700823
824/* The FC Transport Remote Port Attributes: */
825
826/* Fixed Remote Port Attributes */
827
828fc_private_rport_rd_attr(maxframe_size, "%u bytes\n", 20);
829
830static ssize_t
Tony Jonesee959b02008-02-22 00:13:36 +0100831show_fc_rport_supported_classes (struct device *dev,
832 struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700833{
Tony Jonesee959b02008-02-22 00:13:36 +0100834 struct fc_rport *rport = transport_class_to_rport(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700835 if (rport->supported_classes == FC_COS_UNSPECIFIED)
836 return snprintf(buf, 20, "unspecified\n");
837 return get_fc_cos_names(rport->supported_classes, buf);
838}
Tony Jonesee959b02008-02-22 00:13:36 +0100839static FC_DEVICE_ATTR(rport, supported_classes, S_IRUGO,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700840 show_fc_rport_supported_classes, NULL);
841
842/* Dynamic Remote Port Attributes */
843
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -0400844/*
845 * dev_loss_tmo attribute
846 */
Mike Christie43ca9102010-09-15 16:52:32 -0500847static int fc_str_to_dev_loss(const char *buf, unsigned long *val)
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -0400848{
Mike Christie43ca9102010-09-15 16:52:32 -0500849 char *cp;
850
851 *val = simple_strtoul(buf, &cp, 0);
852 if ((*cp && (*cp != '\n')) || (*val < 0))
853 return -EINVAL;
854 /*
855 * Check for overflow; dev_loss_tmo is u32
856 */
857 if (*val > UINT_MAX)
858 return -EINVAL;
859
860 return 0;
861}
862
863static int fc_rport_set_dev_loss_tmo(struct fc_rport *rport,
864 unsigned long val)
865{
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -0400866 struct Scsi_Host *shost = rport_to_shost(rport);
867 struct fc_internal *i = to_fc_internal(shost->transportt);
Mike Christie43ca9102010-09-15 16:52:32 -0500868
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -0400869 if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
James.Smart@Emulex.Com42e33142005-12-15 09:56:22 -0500870 (rport->port_state == FC_PORTSTATE_DELETED) ||
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -0400871 (rport->port_state == FC_PORTSTATE_NOTPRESENT))
872 return -EBUSY;
Hannes Reineckef28186632009-12-15 09:26:06 +0100873 /*
Hannes Reinecke36dd2882010-03-09 10:18:48 +0100874 * Check for overflow; dev_loss_tmo is u32
875 */
876 if (val > UINT_MAX)
877 return -EINVAL;
878
879 /*
Hannes Reineckef28186632009-12-15 09:26:06 +0100880 * If fast_io_fail is off we have to cap
881 * dev_loss_tmo at SCSI_DEVICE_BLOCK_MAX_TIMEOUT
882 */
883 if (rport->fast_io_fail_tmo == -1 &&
884 val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT)
885 return -EINVAL;
886
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -0400887 i->f->set_rport_dev_loss_tmo(rport, val);
Mike Christie43ca9102010-09-15 16:52:32 -0500888 return 0;
889}
890
891fc_rport_show_function(dev_loss_tmo, "%d\n", 20, )
892static ssize_t
893store_fc_rport_dev_loss_tmo(struct device *dev, struct device_attribute *attr,
894 const char *buf, size_t count)
895{
896 struct fc_rport *rport = transport_class_to_rport(dev);
897 unsigned long val;
898 int rc;
899
900 rc = fc_str_to_dev_loss(buf, &val);
901 if (rc)
902 return rc;
903
904 rc = fc_rport_set_dev_loss_tmo(rport, val);
905 if (rc)
906 return rc;
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -0400907 return count;
908}
Tony Jonesee959b02008-02-22 00:13:36 +0100909static FC_DEVICE_ATTR(rport, dev_loss_tmo, S_IRUGO | S_IWUSR,
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -0400910 show_fc_rport_dev_loss_tmo, store_fc_rport_dev_loss_tmo);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700911
912
913/* Private Remote Port Attributes */
914
915fc_private_rport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
916fc_private_rport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
917fc_private_rport_rd_attr(port_id, "0x%06x\n", 20);
918
919static ssize_t
Tony Jonesee959b02008-02-22 00:13:36 +0100920show_fc_rport_roles (struct device *dev, struct device_attribute *attr,
921 char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700922{
Tony Jonesee959b02008-02-22 00:13:36 +0100923 struct fc_rport *rport = transport_class_to_rport(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700924
925 /* identify any roles that are port_id specific */
926 if ((rport->port_id != -1) &&
927 (rport->port_id & FC_WELLKNOWN_PORTID_MASK) ==
928 FC_WELLKNOWN_PORTID_MASK) {
929 switch (rport->port_id & FC_WELLKNOWN_ROLE_MASK) {
930 case FC_FPORT_PORTID:
931 return snprintf(buf, 30, "Fabric Port\n");
932 case FC_FABCTLR_PORTID:
933 return snprintf(buf, 30, "Fabric Controller\n");
934 case FC_DIRSRVR_PORTID:
935 return snprintf(buf, 30, "Directory Server\n");
936 case FC_TIMESRVR_PORTID:
937 return snprintf(buf, 30, "Time Server\n");
938 case FC_MGMTSRVR_PORTID:
939 return snprintf(buf, 30, "Management Server\n");
940 default:
941 return snprintf(buf, 30, "Unknown Fabric Entity\n");
942 }
943 } else {
James Smarta53eb5e2007-04-27 12:41:09 -0400944 if (rport->roles == FC_PORT_ROLE_UNKNOWN)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700945 return snprintf(buf, 20, "unknown\n");
James Smarta53eb5e2007-04-27 12:41:09 -0400946 return get_fc_port_roles_names(rport->roles, buf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700947 }
948}
Tony Jonesee959b02008-02-22 00:13:36 +0100949static FC_DEVICE_ATTR(rport, roles, S_IRUGO,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700950 show_fc_rport_roles, NULL);
951
952fc_private_rport_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
953fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20);
954
James Smart0f29b962006-08-18 17:33:29 -0400955/*
956 * fast_io_fail_tmo attribute
957 */
958static ssize_t
Tony Jonesee959b02008-02-22 00:13:36 +0100959show_fc_rport_fast_io_fail_tmo (struct device *dev,
960 struct device_attribute *attr, char *buf)
James Smart0f29b962006-08-18 17:33:29 -0400961{
Tony Jonesee959b02008-02-22 00:13:36 +0100962 struct fc_rport *rport = transport_class_to_rport(dev);
James Smart0f29b962006-08-18 17:33:29 -0400963
964 if (rport->fast_io_fail_tmo == -1)
965 return snprintf(buf, 5, "off\n");
966 return snprintf(buf, 20, "%d\n", rport->fast_io_fail_tmo);
967}
968
969static ssize_t
Tony Jonesee959b02008-02-22 00:13:36 +0100970store_fc_rport_fast_io_fail_tmo(struct device *dev,
971 struct device_attribute *attr, const char *buf,
972 size_t count)
James Smart0f29b962006-08-18 17:33:29 -0400973{
974 int val;
975 char *cp;
Tony Jonesee959b02008-02-22 00:13:36 +0100976 struct fc_rport *rport = transport_class_to_rport(dev);
James Smart0f29b962006-08-18 17:33:29 -0400977
978 if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
979 (rport->port_state == FC_PORTSTATE_DELETED) ||
980 (rport->port_state == FC_PORTSTATE_NOTPRESENT))
981 return -EBUSY;
982 if (strncmp(buf, "off", 3) == 0)
983 rport->fast_io_fail_tmo = -1;
984 else {
985 val = simple_strtoul(buf, &cp, 0);
Hannes Reineckef28186632009-12-15 09:26:06 +0100986 if ((*cp && (*cp != '\n')) || (val < 0))
James Smart0f29b962006-08-18 17:33:29 -0400987 return -EINVAL;
Hannes Reineckef28186632009-12-15 09:26:06 +0100988 /*
989 * Cap fast_io_fail by dev_loss_tmo or
990 * SCSI_DEVICE_BLOCK_MAX_TIMEOUT.
991 */
992 if ((val >= rport->dev_loss_tmo) ||
993 (val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT))
994 return -EINVAL;
995
James Smart0f29b962006-08-18 17:33:29 -0400996 rport->fast_io_fail_tmo = val;
997 }
998 return count;
999}
Tony Jonesee959b02008-02-22 00:13:36 +01001000static FC_DEVICE_ATTR(rport, fast_io_fail_tmo, S_IRUGO | S_IWUSR,
James Smart0f29b962006-08-18 17:33:29 -04001001 show_fc_rport_fast_io_fail_tmo, store_fc_rport_fast_io_fail_tmo);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001002
1003
1004/*
1005 * FC SCSI Target Attribute Management
1006 */
1007
1008/*
1009 * Note: in the target show function we recognize when the remote
Uwe Kleine-König732bee72010-06-11 12:16:59 +02001010 * port is in the hierarchy and do not allow the driver to get
Linus Torvalds1da177e2005-04-16 15:20:36 -07001011 * involved in sysfs functions. The driver only gets involved if
1012 * it's the "old" style that doesn't use rports.
1013 */
1014#define fc_starget_show_function(field, format_string, sz, cast) \
1015static ssize_t \
Tony Jonesee959b02008-02-22 00:13:36 +01001016show_fc_starget_##field (struct device *dev, \
1017 struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001018{ \
Tony Jonesee959b02008-02-22 00:13:36 +01001019 struct scsi_target *starget = transport_class_to_starget(dev); \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001020 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \
1021 struct fc_internal *i = to_fc_internal(shost->transportt); \
1022 struct fc_rport *rport = starget_to_rport(starget); \
1023 if (rport) \
1024 fc_starget_##field(starget) = rport->field; \
1025 else if (i->f->get_starget_##field) \
1026 i->f->get_starget_##field(starget); \
1027 return snprintf(buf, sz, format_string, \
1028 cast fc_starget_##field(starget)); \
1029}
1030
1031#define fc_starget_rd_attr(field, format_string, sz) \
1032 fc_starget_show_function(field, format_string, sz, ) \
Tony Jonesee959b02008-02-22 00:13:36 +01001033static FC_DEVICE_ATTR(starget, field, S_IRUGO, \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001034 show_fc_starget_##field, NULL)
1035
1036#define fc_starget_rd_attr_cast(field, format_string, sz, cast) \
1037 fc_starget_show_function(field, format_string, sz, (cast)) \
Tony Jonesee959b02008-02-22 00:13:36 +01001038static FC_DEVICE_ATTR(starget, field, S_IRUGO, \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001039 show_fc_starget_##field, NULL)
1040
1041#define SETUP_STARGET_ATTRIBUTE_RD(field) \
Tony Jonesee959b02008-02-22 00:13:36 +01001042 i->private_starget_attrs[count] = device_attr_starget_##field; \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001043 i->private_starget_attrs[count].attr.mode = S_IRUGO; \
1044 i->private_starget_attrs[count].store = NULL; \
1045 i->starget_attrs[count] = &i->private_starget_attrs[count]; \
1046 if (i->f->show_starget_##field) \
1047 count++
1048
1049#define SETUP_STARGET_ATTRIBUTE_RW(field) \
Tony Jonesee959b02008-02-22 00:13:36 +01001050 i->private_starget_attrs[count] = device_attr_starget_##field; \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001051 if (!i->f->set_starget_##field) { \
1052 i->private_starget_attrs[count].attr.mode = S_IRUGO; \
1053 i->private_starget_attrs[count].store = NULL; \
1054 } \
1055 i->starget_attrs[count] = &i->private_starget_attrs[count]; \
1056 if (i->f->show_starget_##field) \
1057 count++
1058
1059/* The FC Transport SCSI Target Attributes: */
1060fc_starget_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1061fc_starget_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1062fc_starget_rd_attr(port_id, "0x%06x\n", 20);
1063
1064
1065/*
James Smarta53eb5e2007-04-27 12:41:09 -04001066 * FC Virtual Port Attribute Management
1067 */
1068
1069#define fc_vport_show_function(field, format_string, sz, cast) \
1070static ssize_t \
Tony Jonesee959b02008-02-22 00:13:36 +01001071show_fc_vport_##field (struct device *dev, \
1072 struct device_attribute *attr, char *buf) \
James Smarta53eb5e2007-04-27 12:41:09 -04001073{ \
Tony Jonesee959b02008-02-22 00:13:36 +01001074 struct fc_vport *vport = transport_class_to_vport(dev); \
James Smarta53eb5e2007-04-27 12:41:09 -04001075 struct Scsi_Host *shost = vport_to_shost(vport); \
1076 struct fc_internal *i = to_fc_internal(shost->transportt); \
1077 if ((i->f->get_vport_##field) && \
1078 !(vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))) \
1079 i->f->get_vport_##field(vport); \
1080 return snprintf(buf, sz, format_string, cast vport->field); \
1081}
1082
1083#define fc_vport_store_function(field) \
1084static ssize_t \
Tony Jonesee959b02008-02-22 00:13:36 +01001085store_fc_vport_##field(struct device *dev, \
1086 struct device_attribute *attr, \
1087 const char *buf, size_t count) \
James Smarta53eb5e2007-04-27 12:41:09 -04001088{ \
1089 int val; \
Tony Jonesee959b02008-02-22 00:13:36 +01001090 struct fc_vport *vport = transport_class_to_vport(dev); \
James Smarta53eb5e2007-04-27 12:41:09 -04001091 struct Scsi_Host *shost = vport_to_shost(vport); \
1092 struct fc_internal *i = to_fc_internal(shost->transportt); \
1093 char *cp; \
1094 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \
1095 return -EBUSY; \
1096 val = simple_strtoul(buf, &cp, 0); \
1097 if (*cp && (*cp != '\n')) \
1098 return -EINVAL; \
1099 i->f->set_vport_##field(vport, val); \
1100 return count; \
1101}
1102
1103#define fc_vport_store_str_function(field, slen) \
1104static ssize_t \
Tony Jonesee959b02008-02-22 00:13:36 +01001105store_fc_vport_##field(struct device *dev, \
1106 struct device_attribute *attr, \
1107 const char *buf, size_t count) \
James Smarta53eb5e2007-04-27 12:41:09 -04001108{ \
Tony Jonesee959b02008-02-22 00:13:36 +01001109 struct fc_vport *vport = transport_class_to_vport(dev); \
James Smarta53eb5e2007-04-27 12:41:09 -04001110 struct Scsi_Host *shost = vport_to_shost(vport); \
1111 struct fc_internal *i = to_fc_internal(shost->transportt); \
1112 unsigned int cnt=count; \
1113 \
1114 /* count may include a LF at end of string */ \
1115 if (buf[cnt-1] == '\n') \
1116 cnt--; \
1117 if (cnt > ((slen) - 1)) \
1118 return -EINVAL; \
1119 memcpy(vport->field, buf, cnt); \
1120 i->f->set_vport_##field(vport); \
1121 return count; \
1122}
1123
1124#define fc_vport_rd_attr(field, format_string, sz) \
1125 fc_vport_show_function(field, format_string, sz, ) \
Tony Jonesee959b02008-02-22 00:13:36 +01001126static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
James Smarta53eb5e2007-04-27 12:41:09 -04001127 show_fc_vport_##field, NULL)
1128
1129#define fc_vport_rd_attr_cast(field, format_string, sz, cast) \
1130 fc_vport_show_function(field, format_string, sz, (cast)) \
Tony Jonesee959b02008-02-22 00:13:36 +01001131static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
James Smarta53eb5e2007-04-27 12:41:09 -04001132 show_fc_vport_##field, NULL)
1133
1134#define fc_vport_rw_attr(field, format_string, sz) \
1135 fc_vport_show_function(field, format_string, sz, ) \
1136 fc_vport_store_function(field) \
Tony Jonesee959b02008-02-22 00:13:36 +01001137static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \
James Smarta53eb5e2007-04-27 12:41:09 -04001138 show_fc_vport_##field, \
1139 store_fc_vport_##field)
1140
1141#define fc_private_vport_show_function(field, format_string, sz, cast) \
1142static ssize_t \
Tony Jonesee959b02008-02-22 00:13:36 +01001143show_fc_vport_##field (struct device *dev, \
1144 struct device_attribute *attr, char *buf) \
James Smarta53eb5e2007-04-27 12:41:09 -04001145{ \
Tony Jonesee959b02008-02-22 00:13:36 +01001146 struct fc_vport *vport = transport_class_to_vport(dev); \
James Smarta53eb5e2007-04-27 12:41:09 -04001147 return snprintf(buf, sz, format_string, cast vport->field); \
1148}
1149
1150#define fc_private_vport_store_u32_function(field) \
1151static ssize_t \
Tony Jonesee959b02008-02-22 00:13:36 +01001152store_fc_vport_##field(struct device *dev, \
1153 struct device_attribute *attr, \
1154 const char *buf, size_t count) \
James Smarta53eb5e2007-04-27 12:41:09 -04001155{ \
1156 u32 val; \
Tony Jonesee959b02008-02-22 00:13:36 +01001157 struct fc_vport *vport = transport_class_to_vport(dev); \
James Smarta53eb5e2007-04-27 12:41:09 -04001158 char *cp; \
1159 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \
1160 return -EBUSY; \
1161 val = simple_strtoul(buf, &cp, 0); \
1162 if (*cp && (*cp != '\n')) \
1163 return -EINVAL; \
1164 vport->field = val; \
1165 return count; \
1166}
1167
1168
1169#define fc_private_vport_rd_attr(field, format_string, sz) \
1170 fc_private_vport_show_function(field, format_string, sz, ) \
Tony Jonesee959b02008-02-22 00:13:36 +01001171static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
James Smarta53eb5e2007-04-27 12:41:09 -04001172 show_fc_vport_##field, NULL)
1173
1174#define fc_private_vport_rd_attr_cast(field, format_string, sz, cast) \
1175 fc_private_vport_show_function(field, format_string, sz, (cast)) \
Tony Jonesee959b02008-02-22 00:13:36 +01001176static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
James Smarta53eb5e2007-04-27 12:41:09 -04001177 show_fc_vport_##field, NULL)
1178
1179#define fc_private_vport_rw_u32_attr(field, format_string, sz) \
1180 fc_private_vport_show_function(field, format_string, sz, ) \
1181 fc_private_vport_store_u32_function(field) \
Tony Jonesee959b02008-02-22 00:13:36 +01001182static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \
James Smarta53eb5e2007-04-27 12:41:09 -04001183 show_fc_vport_##field, \
1184 store_fc_vport_##field)
1185
1186
1187#define fc_private_vport_rd_enum_attr(title, maxlen) \
1188static ssize_t \
Tony Jonesee959b02008-02-22 00:13:36 +01001189show_fc_vport_##title (struct device *dev, \
1190 struct device_attribute *attr, \
1191 char *buf) \
James Smarta53eb5e2007-04-27 12:41:09 -04001192{ \
Tony Jonesee959b02008-02-22 00:13:36 +01001193 struct fc_vport *vport = transport_class_to_vport(dev); \
James Smarta53eb5e2007-04-27 12:41:09 -04001194 const char *name; \
1195 name = get_fc_##title##_name(vport->title); \
1196 if (!name) \
1197 return -EINVAL; \
1198 return snprintf(buf, maxlen, "%s\n", name); \
1199} \
Tony Jonesee959b02008-02-22 00:13:36 +01001200static FC_DEVICE_ATTR(vport, title, S_IRUGO, \
James Smarta53eb5e2007-04-27 12:41:09 -04001201 show_fc_vport_##title, NULL)
1202
1203
1204#define SETUP_VPORT_ATTRIBUTE_RD(field) \
Tony Jonesee959b02008-02-22 00:13:36 +01001205 i->private_vport_attrs[count] = device_attr_vport_##field; \
James Smarta53eb5e2007-04-27 12:41:09 -04001206 i->private_vport_attrs[count].attr.mode = S_IRUGO; \
1207 i->private_vport_attrs[count].store = NULL; \
1208 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1209 if (i->f->get_##field) \
1210 count++
1211 /* NOTE: Above MACRO differs: checks function not show bit */
1212
1213#define SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(field) \
Tony Jonesee959b02008-02-22 00:13:36 +01001214 i->private_vport_attrs[count] = device_attr_vport_##field; \
James Smarta53eb5e2007-04-27 12:41:09 -04001215 i->private_vport_attrs[count].attr.mode = S_IRUGO; \
1216 i->private_vport_attrs[count].store = NULL; \
1217 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1218 count++
1219
1220#define SETUP_VPORT_ATTRIBUTE_WR(field) \
Tony Jonesee959b02008-02-22 00:13:36 +01001221 i->private_vport_attrs[count] = device_attr_vport_##field; \
James Smarta53eb5e2007-04-27 12:41:09 -04001222 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1223 if (i->f->field) \
1224 count++
1225 /* NOTE: Above MACRO differs: checks function */
1226
1227#define SETUP_VPORT_ATTRIBUTE_RW(field) \
Tony Jonesee959b02008-02-22 00:13:36 +01001228 i->private_vport_attrs[count] = device_attr_vport_##field; \
James Smarta53eb5e2007-04-27 12:41:09 -04001229 if (!i->f->set_vport_##field) { \
1230 i->private_vport_attrs[count].attr.mode = S_IRUGO; \
1231 i->private_vport_attrs[count].store = NULL; \
1232 } \
1233 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1234 count++
1235 /* NOTE: Above MACRO differs: does not check show bit */
1236
1237#define SETUP_PRIVATE_VPORT_ATTRIBUTE_RW(field) \
1238{ \
Tony Jonesee959b02008-02-22 00:13:36 +01001239 i->private_vport_attrs[count] = device_attr_vport_##field; \
James Smarta53eb5e2007-04-27 12:41:09 -04001240 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1241 count++; \
1242}
1243
1244
1245/* The FC Transport Virtual Port Attributes: */
1246
1247/* Fixed Virtual Port Attributes */
1248
1249/* Dynamic Virtual Port Attributes */
1250
1251/* Private Virtual Port Attributes */
1252
1253fc_private_vport_rd_enum_attr(vport_state, FC_VPORTSTATE_MAX_NAMELEN);
1254fc_private_vport_rd_enum_attr(vport_last_state, FC_VPORTSTATE_MAX_NAMELEN);
1255fc_private_vport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1256fc_private_vport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1257
1258static ssize_t
Tony Jonesee959b02008-02-22 00:13:36 +01001259show_fc_vport_roles (struct device *dev, struct device_attribute *attr,
1260 char *buf)
James Smarta53eb5e2007-04-27 12:41:09 -04001261{
Tony Jonesee959b02008-02-22 00:13:36 +01001262 struct fc_vport *vport = transport_class_to_vport(dev);
James Smarta53eb5e2007-04-27 12:41:09 -04001263
1264 if (vport->roles == FC_PORT_ROLE_UNKNOWN)
1265 return snprintf(buf, 20, "unknown\n");
1266 return get_fc_port_roles_names(vport->roles, buf);
1267}
Tony Jonesee959b02008-02-22 00:13:36 +01001268static FC_DEVICE_ATTR(vport, roles, S_IRUGO, show_fc_vport_roles, NULL);
James Smarta53eb5e2007-04-27 12:41:09 -04001269
1270fc_private_vport_rd_enum_attr(vport_type, FC_PORTTYPE_MAX_NAMELEN);
1271
1272fc_private_vport_show_function(symbolic_name, "%s\n",
1273 FC_VPORT_SYMBOLIC_NAMELEN + 1, )
1274fc_vport_store_str_function(symbolic_name, FC_VPORT_SYMBOLIC_NAMELEN)
Tony Jonesee959b02008-02-22 00:13:36 +01001275static FC_DEVICE_ATTR(vport, symbolic_name, S_IRUGO | S_IWUSR,
James Smarta53eb5e2007-04-27 12:41:09 -04001276 show_fc_vport_symbolic_name, store_fc_vport_symbolic_name);
1277
1278static ssize_t
Tony Jonesee959b02008-02-22 00:13:36 +01001279store_fc_vport_delete(struct device *dev, struct device_attribute *attr,
1280 const char *buf, size_t count)
James Smarta53eb5e2007-04-27 12:41:09 -04001281{
Tony Jonesee959b02008-02-22 00:13:36 +01001282 struct fc_vport *vport = transport_class_to_vport(dev);
James Smart9ef3e4a2007-05-24 19:04:44 -04001283 struct Scsi_Host *shost = vport_to_shost(vport);
Gal Rosen0d9dc7c2010-01-21 10:15:32 +02001284 unsigned long flags;
1285
1286 spin_lock_irqsave(shost->host_lock, flags);
1287 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) {
1288 spin_unlock_irqrestore(shost->host_lock, flags);
1289 return -EBUSY;
1290 }
1291 vport->flags |= FC_VPORT_DELETING;
1292 spin_unlock_irqrestore(shost->host_lock, flags);
James Smarta53eb5e2007-04-27 12:41:09 -04001293
James Smart9ef3e4a2007-05-24 19:04:44 -04001294 fc_queue_work(shost, &vport->vport_delete_work);
James Smarta53eb5e2007-04-27 12:41:09 -04001295 return count;
1296}
Tony Jonesee959b02008-02-22 00:13:36 +01001297static FC_DEVICE_ATTR(vport, vport_delete, S_IWUSR,
James Smarta53eb5e2007-04-27 12:41:09 -04001298 NULL, store_fc_vport_delete);
1299
1300
1301/*
1302 * Enable/Disable vport
1303 * Write "1" to disable, write "0" to enable
1304 */
1305static ssize_t
Tony Jonesee959b02008-02-22 00:13:36 +01001306store_fc_vport_disable(struct device *dev, struct device_attribute *attr,
1307 const char *buf,
James Smarta53eb5e2007-04-27 12:41:09 -04001308 size_t count)
1309{
Tony Jonesee959b02008-02-22 00:13:36 +01001310 struct fc_vport *vport = transport_class_to_vport(dev);
James Smarta53eb5e2007-04-27 12:41:09 -04001311 struct Scsi_Host *shost = vport_to_shost(vport);
1312 struct fc_internal *i = to_fc_internal(shost->transportt);
1313 int stat;
1314
1315 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))
1316 return -EBUSY;
1317
1318 if (*buf == '0') {
1319 if (vport->vport_state != FC_VPORT_DISABLED)
1320 return -EALREADY;
1321 } else if (*buf == '1') {
1322 if (vport->vport_state == FC_VPORT_DISABLED)
1323 return -EALREADY;
1324 } else
1325 return -EINVAL;
1326
1327 stat = i->f->vport_disable(vport, ((*buf == '0') ? false : true));
1328 return stat ? stat : count;
1329}
Tony Jonesee959b02008-02-22 00:13:36 +01001330static FC_DEVICE_ATTR(vport, vport_disable, S_IWUSR,
James Smarta53eb5e2007-04-27 12:41:09 -04001331 NULL, store_fc_vport_disable);
1332
1333
1334/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001335 * Host Attribute Management
1336 */
1337
1338#define fc_host_show_function(field, format_string, sz, cast) \
1339static ssize_t \
Tony Jonesee959b02008-02-22 00:13:36 +01001340show_fc_host_##field (struct device *dev, \
1341 struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001342{ \
Tony Jonesee959b02008-02-22 00:13:36 +01001343 struct Scsi_Host *shost = transport_class_to_shost(dev); \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001344 struct fc_internal *i = to_fc_internal(shost->transportt); \
1345 if (i->f->get_host_##field) \
1346 i->f->get_host_##field(shost); \
1347 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
1348}
1349
1350#define fc_host_store_function(field) \
1351static ssize_t \
Tony Jonesee959b02008-02-22 00:13:36 +01001352store_fc_host_##field(struct device *dev, \
1353 struct device_attribute *attr, \
1354 const char *buf, size_t count) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001355{ \
1356 int val; \
Tony Jonesee959b02008-02-22 00:13:36 +01001357 struct Scsi_Host *shost = transport_class_to_shost(dev); \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001358 struct fc_internal *i = to_fc_internal(shost->transportt); \
James Smart0f29b962006-08-18 17:33:29 -04001359 char *cp; \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001360 \
James Smart0f29b962006-08-18 17:33:29 -04001361 val = simple_strtoul(buf, &cp, 0); \
1362 if (*cp && (*cp != '\n')) \
1363 return -EINVAL; \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001364 i->f->set_host_##field(shost, val); \
1365 return count; \
1366}
1367
James Smartb8d08212006-08-17 08:00:43 -04001368#define fc_host_store_str_function(field, slen) \
1369static ssize_t \
Tony Jonesee959b02008-02-22 00:13:36 +01001370store_fc_host_##field(struct device *dev, \
1371 struct device_attribute *attr, \
1372 const char *buf, size_t count) \
James Smartb8d08212006-08-17 08:00:43 -04001373{ \
Tony Jonesee959b02008-02-22 00:13:36 +01001374 struct Scsi_Host *shost = transport_class_to_shost(dev); \
James Smartb8d08212006-08-17 08:00:43 -04001375 struct fc_internal *i = to_fc_internal(shost->transportt); \
1376 unsigned int cnt=count; \
1377 \
1378 /* count may include a LF at end of string */ \
1379 if (buf[cnt-1] == '\n') \
1380 cnt--; \
1381 if (cnt > ((slen) - 1)) \
1382 return -EINVAL; \
1383 memcpy(fc_host_##field(shost), buf, cnt); \
1384 i->f->set_host_##field(shost); \
1385 return count; \
1386}
1387
Linus Torvalds1da177e2005-04-16 15:20:36 -07001388#define fc_host_rd_attr(field, format_string, sz) \
1389 fc_host_show_function(field, format_string, sz, ) \
Tony Jonesee959b02008-02-22 00:13:36 +01001390static FC_DEVICE_ATTR(host, field, S_IRUGO, \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001391 show_fc_host_##field, NULL)
1392
1393#define fc_host_rd_attr_cast(field, format_string, sz, cast) \
1394 fc_host_show_function(field, format_string, sz, (cast)) \
Tony Jonesee959b02008-02-22 00:13:36 +01001395static FC_DEVICE_ATTR(host, field, S_IRUGO, \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001396 show_fc_host_##field, NULL)
1397
1398#define fc_host_rw_attr(field, format_string, sz) \
1399 fc_host_show_function(field, format_string, sz, ) \
1400 fc_host_store_function(field) \
Tony Jonesee959b02008-02-22 00:13:36 +01001401static FC_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR, \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001402 show_fc_host_##field, \
1403 store_fc_host_##field)
1404
1405#define fc_host_rd_enum_attr(title, maxlen) \
1406static ssize_t \
Tony Jonesee959b02008-02-22 00:13:36 +01001407show_fc_host_##title (struct device *dev, \
1408 struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001409{ \
Tony Jonesee959b02008-02-22 00:13:36 +01001410 struct Scsi_Host *shost = transport_class_to_shost(dev); \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001411 struct fc_internal *i = to_fc_internal(shost->transportt); \
1412 const char *name; \
1413 if (i->f->get_host_##title) \
1414 i->f->get_host_##title(shost); \
1415 name = get_fc_##title##_name(fc_host_##title(shost)); \
1416 if (!name) \
1417 return -EINVAL; \
1418 return snprintf(buf, maxlen, "%s\n", name); \
1419} \
Tony Jonesee959b02008-02-22 00:13:36 +01001420static FC_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001421
1422#define SETUP_HOST_ATTRIBUTE_RD(field) \
Tony Jonesee959b02008-02-22 00:13:36 +01001423 i->private_host_attrs[count] = device_attr_host_##field; \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001424 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1425 i->private_host_attrs[count].store = NULL; \
1426 i->host_attrs[count] = &i->private_host_attrs[count]; \
1427 if (i->f->show_host_##field) \
1428 count++
1429
James Smarta53eb5e2007-04-27 12:41:09 -04001430#define SETUP_HOST_ATTRIBUTE_RD_NS(field) \
Tony Jonesee959b02008-02-22 00:13:36 +01001431 i->private_host_attrs[count] = device_attr_host_##field; \
James Smarta53eb5e2007-04-27 12:41:09 -04001432 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1433 i->private_host_attrs[count].store = NULL; \
1434 i->host_attrs[count] = &i->private_host_attrs[count]; \
1435 count++
1436
Linus Torvalds1da177e2005-04-16 15:20:36 -07001437#define SETUP_HOST_ATTRIBUTE_RW(field) \
Tony Jonesee959b02008-02-22 00:13:36 +01001438 i->private_host_attrs[count] = device_attr_host_##field; \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001439 if (!i->f->set_host_##field) { \
1440 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1441 i->private_host_attrs[count].store = NULL; \
1442 } \
1443 i->host_attrs[count] = &i->private_host_attrs[count]; \
1444 if (i->f->show_host_##field) \
1445 count++
1446
1447
1448#define fc_private_host_show_function(field, format_string, sz, cast) \
1449static ssize_t \
Tony Jonesee959b02008-02-22 00:13:36 +01001450show_fc_host_##field (struct device *dev, \
1451 struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001452{ \
Tony Jonesee959b02008-02-22 00:13:36 +01001453 struct Scsi_Host *shost = transport_class_to_shost(dev); \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001454 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
1455}
1456
1457#define fc_private_host_rd_attr(field, format_string, sz) \
1458 fc_private_host_show_function(field, format_string, sz, ) \
Tony Jonesee959b02008-02-22 00:13:36 +01001459static FC_DEVICE_ATTR(host, field, S_IRUGO, \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001460 show_fc_host_##field, NULL)
1461
1462#define fc_private_host_rd_attr_cast(field, format_string, sz, cast) \
1463 fc_private_host_show_function(field, format_string, sz, (cast)) \
Tony Jonesee959b02008-02-22 00:13:36 +01001464static FC_DEVICE_ATTR(host, field, S_IRUGO, \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001465 show_fc_host_##field, NULL)
1466
1467#define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field) \
Tony Jonesee959b02008-02-22 00:13:36 +01001468 i->private_host_attrs[count] = device_attr_host_##field; \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001469 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1470 i->private_host_attrs[count].store = NULL; \
1471 i->host_attrs[count] = &i->private_host_attrs[count]; \
1472 count++
1473
1474#define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field) \
Andrew Vasquez91ca7b02005-10-27 16:03:37 -07001475{ \
Tony Jonesee959b02008-02-22 00:13:36 +01001476 i->private_host_attrs[count] = device_attr_host_##field; \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001477 i->host_attrs[count] = &i->private_host_attrs[count]; \
Andrew Vasquez91ca7b02005-10-27 16:03:37 -07001478 count++; \
1479}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001480
1481
1482/* Fixed Host Attributes */
1483
1484static ssize_t
Tony Jonesee959b02008-02-22 00:13:36 +01001485show_fc_host_supported_classes (struct device *dev,
1486 struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001487{
Tony Jonesee959b02008-02-22 00:13:36 +01001488 struct Scsi_Host *shost = transport_class_to_shost(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001489
1490 if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED)
1491 return snprintf(buf, 20, "unspecified\n");
1492
1493 return get_fc_cos_names(fc_host_supported_classes(shost), buf);
1494}
Tony Jonesee959b02008-02-22 00:13:36 +01001495static FC_DEVICE_ATTR(host, supported_classes, S_IRUGO,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001496 show_fc_host_supported_classes, NULL);
1497
1498static ssize_t
Tony Jonesee959b02008-02-22 00:13:36 +01001499show_fc_host_supported_fc4s (struct device *dev,
1500 struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001501{
Tony Jonesee959b02008-02-22 00:13:36 +01001502 struct Scsi_Host *shost = transport_class_to_shost(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001503 return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost));
1504}
Tony Jonesee959b02008-02-22 00:13:36 +01001505static FC_DEVICE_ATTR(host, supported_fc4s, S_IRUGO,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001506 show_fc_host_supported_fc4s, NULL);
1507
1508static ssize_t
Tony Jonesee959b02008-02-22 00:13:36 +01001509show_fc_host_supported_speeds (struct device *dev,
1510 struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001511{
Tony Jonesee959b02008-02-22 00:13:36 +01001512 struct Scsi_Host *shost = transport_class_to_shost(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001513
1514 if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN)
1515 return snprintf(buf, 20, "unknown\n");
1516
1517 return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf);
1518}
Tony Jonesee959b02008-02-22 00:13:36 +01001519static FC_DEVICE_ATTR(host, supported_speeds, S_IRUGO,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001520 show_fc_host_supported_speeds, NULL);
1521
1522
1523fc_private_host_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1524fc_private_host_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
Andreas Herrmann6b7281d2006-01-13 02:16:54 +01001525fc_private_host_rd_attr_cast(permanent_port_name, "0x%llx\n", 20,
1526 unsigned long long);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001527fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20);
James Smarta53eb5e2007-04-27 12:41:09 -04001528fc_private_host_rd_attr(max_npiv_vports, "%u\n", 20);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001529fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1));
Neerav Parikhbb8ef582012-01-22 17:29:50 -08001530fc_private_host_rd_attr(manufacturer, "%s\n", FC_SERIAL_NUMBER_SIZE + 1);
1531fc_private_host_rd_attr(model, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1532fc_private_host_rd_attr(model_description, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1533fc_private_host_rd_attr(hardware_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1534fc_private_host_rd_attr(driver_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1535fc_private_host_rd_attr(firmware_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1536fc_private_host_rd_attr(optionrom_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001537
1538
1539/* Dynamic Host Attributes */
1540
1541static ssize_t
Tony Jonesee959b02008-02-22 00:13:36 +01001542show_fc_host_active_fc4s (struct device *dev,
1543 struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001544{
Tony Jonesee959b02008-02-22 00:13:36 +01001545 struct Scsi_Host *shost = transport_class_to_shost(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001546 struct fc_internal *i = to_fc_internal(shost->transportt);
1547
1548 if (i->f->get_host_active_fc4s)
1549 i->f->get_host_active_fc4s(shost);
1550
1551 return (ssize_t)show_fc_fc4s(buf, fc_host_active_fc4s(shost));
1552}
Tony Jonesee959b02008-02-22 00:13:36 +01001553static FC_DEVICE_ATTR(host, active_fc4s, S_IRUGO,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001554 show_fc_host_active_fc4s, NULL);
1555
1556static ssize_t
Tony Jonesee959b02008-02-22 00:13:36 +01001557show_fc_host_speed (struct device *dev,
1558 struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001559{
Tony Jonesee959b02008-02-22 00:13:36 +01001560 struct Scsi_Host *shost = transport_class_to_shost(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001561 struct fc_internal *i = to_fc_internal(shost->transportt);
1562
1563 if (i->f->get_host_speed)
1564 i->f->get_host_speed(shost);
1565
1566 if (fc_host_speed(shost) == FC_PORTSPEED_UNKNOWN)
1567 return snprintf(buf, 20, "unknown\n");
1568
1569 return get_fc_port_speed_names(fc_host_speed(shost), buf);
1570}
Tony Jonesee959b02008-02-22 00:13:36 +01001571static FC_DEVICE_ATTR(host, speed, S_IRUGO,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001572 show_fc_host_speed, NULL);
1573
1574
1575fc_host_rd_attr(port_id, "0x%06x\n", 20);
1576fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN);
1577fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
1578fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long);
James Smart016131b2006-08-14 08:20:25 -04001579fc_host_rd_attr(symbolic_name, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001580
James Smartb8d08212006-08-17 08:00:43 -04001581fc_private_host_show_function(system_hostname, "%s\n",
1582 FC_SYMBOLIC_NAME_SIZE + 1, )
1583fc_host_store_str_function(system_hostname, FC_SYMBOLIC_NAME_SIZE)
Tony Jonesee959b02008-02-22 00:13:36 +01001584static FC_DEVICE_ATTR(host, system_hostname, S_IRUGO | S_IWUSR,
James Smartb8d08212006-08-17 08:00:43 -04001585 show_fc_host_system_hostname, store_fc_host_system_hostname);
1586
Linus Torvalds1da177e2005-04-16 15:20:36 -07001587
1588/* Private Host Attributes */
1589
1590static ssize_t
Tony Jonesee959b02008-02-22 00:13:36 +01001591show_fc_private_host_tgtid_bind_type(struct device *dev,
1592 struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001593{
Tony Jonesee959b02008-02-22 00:13:36 +01001594 struct Scsi_Host *shost = transport_class_to_shost(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001595 const char *name;
1596
1597 name = get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost));
1598 if (!name)
1599 return -EINVAL;
1600 return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name);
1601}
1602
James.Smart@Emulex.Comd16794f6a2005-10-05 13:50:08 -04001603#define get_list_head_entry(pos, head, member) \
1604 pos = list_entry((head)->next, typeof(*pos), member)
1605
Linus Torvalds1da177e2005-04-16 15:20:36 -07001606static ssize_t
Tony Jonesee959b02008-02-22 00:13:36 +01001607store_fc_private_host_tgtid_bind_type(struct device *dev,
1608 struct device_attribute *attr, const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001609{
Tony Jonesee959b02008-02-22 00:13:36 +01001610 struct Scsi_Host *shost = transport_class_to_shost(dev);
James.Smart@Emulex.Comd16794f6a2005-10-05 13:50:08 -04001611 struct fc_rport *rport;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001612 enum fc_tgtid_binding_type val;
1613 unsigned long flags;
1614
1615 if (get_fc_tgtid_bind_type_match(buf, &val))
1616 return -EINVAL;
1617
1618 /* if changing bind type, purge all unused consistent bindings */
1619 if (val != fc_host_tgtid_bind_type(shost)) {
1620 spin_lock_irqsave(shost->host_lock, flags);
James.Smart@Emulex.Comd16794f6a2005-10-05 13:50:08 -04001621 while (!list_empty(&fc_host_rport_bindings(shost))) {
1622 get_list_head_entry(rport,
1623 &fc_host_rport_bindings(shost), peers);
James Smartaedf3492006-04-10 10:14:05 -04001624 list_del(&rport->peers);
1625 rport->port_state = FC_PORTSTATE_DELETED;
1626 fc_queue_work(shost, &rport->rport_delete_work);
James.Smart@Emulex.Comd16794f6a2005-10-05 13:50:08 -04001627 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001628 spin_unlock_irqrestore(shost->host_lock, flags);
1629 }
1630
1631 fc_host_tgtid_bind_type(shost) = val;
1632 return count;
1633}
1634
Tony Jonesee959b02008-02-22 00:13:36 +01001635static FC_DEVICE_ATTR(host, tgtid_bind_type, S_IRUGO | S_IWUSR,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001636 show_fc_private_host_tgtid_bind_type,
1637 store_fc_private_host_tgtid_bind_type);
1638
Andrew Vasquez91ca7b02005-10-27 16:03:37 -07001639static ssize_t
Tony Jonesee959b02008-02-22 00:13:36 +01001640store_fc_private_host_issue_lip(struct device *dev,
1641 struct device_attribute *attr, const char *buf, size_t count)
Andrew Vasquez91ca7b02005-10-27 16:03:37 -07001642{
Tony Jonesee959b02008-02-22 00:13:36 +01001643 struct Scsi_Host *shost = transport_class_to_shost(dev);
Andrew Vasquez91ca7b02005-10-27 16:03:37 -07001644 struct fc_internal *i = to_fc_internal(shost->transportt);
1645 int ret;
1646
1647 /* ignore any data value written to the attribute */
1648 if (i->f->issue_fc_host_lip) {
1649 ret = i->f->issue_fc_host_lip(shost);
1650 return ret ? ret: count;
1651 }
1652
1653 return -ENOENT;
1654}
1655
Tony Jonesee959b02008-02-22 00:13:36 +01001656static FC_DEVICE_ATTR(host, issue_lip, S_IWUSR, NULL,
Andrew Vasquez91ca7b02005-10-27 16:03:37 -07001657 store_fc_private_host_issue_lip);
1658
Mike Christie43ca9102010-09-15 16:52:32 -05001659static ssize_t
1660store_fc_private_host_dev_loss_tmo(struct device *dev,
1661 struct device_attribute *attr,
1662 const char *buf, size_t count)
1663{
1664 struct Scsi_Host *shost = transport_class_to_shost(dev);
1665 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1666 struct fc_rport *rport;
1667 unsigned long val, flags;
1668 int rc;
James Smarta53eb5e2007-04-27 12:41:09 -04001669
Mike Christie43ca9102010-09-15 16:52:32 -05001670 rc = fc_str_to_dev_loss(buf, &val);
1671 if (rc)
1672 return rc;
1673
1674 fc_host_dev_loss_tmo(shost) = val;
1675 spin_lock_irqsave(shost->host_lock, flags);
1676 list_for_each_entry(rport, &fc_host->rports, peers)
1677 fc_rport_set_dev_loss_tmo(rport, val);
1678 spin_unlock_irqrestore(shost->host_lock, flags);
1679 return count;
1680}
1681
1682fc_private_host_show_function(dev_loss_tmo, "%d\n", 20, );
1683static FC_DEVICE_ATTR(host, dev_loss_tmo, S_IRUGO | S_IWUSR,
1684 show_fc_host_dev_loss_tmo,
1685 store_fc_private_host_dev_loss_tmo);
1686
1687fc_private_host_rd_attr(npiv_vports_inuse, "%u\n", 20);
James Smarta53eb5e2007-04-27 12:41:09 -04001688
Linus Torvalds1da177e2005-04-16 15:20:36 -07001689/*
1690 * Host Statistics Management
1691 */
1692
1693/* Show a given an attribute in the statistics group */
1694static ssize_t
Tony Jonesee959b02008-02-22 00:13:36 +01001695fc_stat_show(const struct device *dev, char *buf, unsigned long offset)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001696{
Tony Jonesee959b02008-02-22 00:13:36 +01001697 struct Scsi_Host *shost = transport_class_to_shost(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001698 struct fc_internal *i = to_fc_internal(shost->transportt);
1699 struct fc_host_statistics *stats;
1700 ssize_t ret = -ENOENT;
1701
1702 if (offset > sizeof(struct fc_host_statistics) ||
1703 offset % sizeof(u64) != 0)
1704 WARN_ON(1);
1705
1706 if (i->f->get_fc_host_stats) {
1707 stats = (i->f->get_fc_host_stats)(shost);
1708 if (stats)
1709 ret = snprintf(buf, 20, "0x%llx\n",
1710 (unsigned long long)*(u64 *)(((u8 *) stats) + offset));
1711 }
1712 return ret;
1713}
1714
1715
1716/* generate a read-only statistics attribute */
1717#define fc_host_statistic(name) \
Tony Jonesee959b02008-02-22 00:13:36 +01001718static ssize_t show_fcstat_##name(struct device *cd, \
1719 struct device_attribute *attr, \
1720 char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001721{ \
1722 return fc_stat_show(cd, buf, \
1723 offsetof(struct fc_host_statistics, name)); \
1724} \
Tony Jonesee959b02008-02-22 00:13:36 +01001725static FC_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001726
1727fc_host_statistic(seconds_since_last_reset);
1728fc_host_statistic(tx_frames);
1729fc_host_statistic(tx_words);
1730fc_host_statistic(rx_frames);
1731fc_host_statistic(rx_words);
1732fc_host_statistic(lip_count);
1733fc_host_statistic(nos_count);
1734fc_host_statistic(error_frames);
1735fc_host_statistic(dumped_frames);
1736fc_host_statistic(link_failure_count);
1737fc_host_statistic(loss_of_sync_count);
1738fc_host_statistic(loss_of_signal_count);
1739fc_host_statistic(prim_seq_protocol_err_count);
1740fc_host_statistic(invalid_tx_word_count);
1741fc_host_statistic(invalid_crc_count);
1742fc_host_statistic(fcp_input_requests);
1743fc_host_statistic(fcp_output_requests);
1744fc_host_statistic(fcp_control_requests);
1745fc_host_statistic(fcp_input_megabytes);
1746fc_host_statistic(fcp_output_megabytes);
Vasu Deve58abb02012-05-25 10:26:38 -07001747fc_host_statistic(fcp_packet_alloc_failures);
1748fc_host_statistic(fcp_packet_aborts);
1749fc_host_statistic(fcp_frame_alloc_failures);
1750fc_host_statistic(fc_no_free_exch);
1751fc_host_statistic(fc_no_free_exch_xid);
1752fc_host_statistic(fc_xid_not_found);
1753fc_host_statistic(fc_xid_busy);
1754fc_host_statistic(fc_seq_not_found);
1755fc_host_statistic(fc_non_bls_resp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001756
1757static ssize_t
Tony Jonesee959b02008-02-22 00:13:36 +01001758fc_reset_statistics(struct device *dev, struct device_attribute *attr,
1759 const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001760{
Tony Jonesee959b02008-02-22 00:13:36 +01001761 struct Scsi_Host *shost = transport_class_to_shost(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001762 struct fc_internal *i = to_fc_internal(shost->transportt);
1763
1764 /* ignore any data value written to the attribute */
1765 if (i->f->reset_fc_host_stats) {
1766 i->f->reset_fc_host_stats(shost);
1767 return count;
1768 }
1769
1770 return -ENOENT;
1771}
Tony Jonesee959b02008-02-22 00:13:36 +01001772static FC_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001773 fc_reset_statistics);
1774
Linus Torvalds1da177e2005-04-16 15:20:36 -07001775static struct attribute *fc_statistics_attrs[] = {
Tony Jonesee959b02008-02-22 00:13:36 +01001776 &device_attr_host_seconds_since_last_reset.attr,
1777 &device_attr_host_tx_frames.attr,
1778 &device_attr_host_tx_words.attr,
1779 &device_attr_host_rx_frames.attr,
1780 &device_attr_host_rx_words.attr,
1781 &device_attr_host_lip_count.attr,
1782 &device_attr_host_nos_count.attr,
1783 &device_attr_host_error_frames.attr,
1784 &device_attr_host_dumped_frames.attr,
1785 &device_attr_host_link_failure_count.attr,
1786 &device_attr_host_loss_of_sync_count.attr,
1787 &device_attr_host_loss_of_signal_count.attr,
1788 &device_attr_host_prim_seq_protocol_err_count.attr,
1789 &device_attr_host_invalid_tx_word_count.attr,
1790 &device_attr_host_invalid_crc_count.attr,
1791 &device_attr_host_fcp_input_requests.attr,
1792 &device_attr_host_fcp_output_requests.attr,
1793 &device_attr_host_fcp_control_requests.attr,
1794 &device_attr_host_fcp_input_megabytes.attr,
1795 &device_attr_host_fcp_output_megabytes.attr,
Vasu Deve58abb02012-05-25 10:26:38 -07001796 &device_attr_host_fcp_packet_alloc_failures.attr,
1797 &device_attr_host_fcp_packet_aborts.attr,
1798 &device_attr_host_fcp_frame_alloc_failures.attr,
1799 &device_attr_host_fc_no_free_exch.attr,
1800 &device_attr_host_fc_no_free_exch_xid.attr,
1801 &device_attr_host_fc_xid_not_found.attr,
1802 &device_attr_host_fc_xid_busy.attr,
1803 &device_attr_host_fc_seq_not_found.attr,
1804 &device_attr_host_fc_non_bls_resp.attr,
Tony Jonesee959b02008-02-22 00:13:36 +01001805 &device_attr_host_reset_statistics.attr,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001806 NULL
1807};
1808
1809static struct attribute_group fc_statistics_group = {
1810 .name = "statistics",
1811 .attrs = fc_statistics_attrs,
1812};
1813
James Smarta53eb5e2007-04-27 12:41:09 -04001814
1815/* Host Vport Attributes */
1816
1817static int
1818fc_parse_wwn(const char *ns, u64 *nm)
1819{
1820 unsigned int i, j;
1821 u8 wwn[8];
1822
1823 memset(wwn, 0, sizeof(wwn));
1824
1825 /* Validate and store the new name */
1826 for (i=0, j=0; i < 16; i++) {
Andy Shevchenkoecc30992010-08-10 18:01:27 -07001827 int value;
1828
1829 value = hex_to_bin(*ns++);
1830 if (value >= 0)
1831 j = (j << 4) | value;
James Smarta53eb5e2007-04-27 12:41:09 -04001832 else
1833 return -EINVAL;
1834 if (i % 2) {
1835 wwn[i/2] = j & 0xff;
1836 j = 0;
1837 }
1838 }
1839
1840 *nm = wwn_to_u64(wwn);
1841
1842 return 0;
1843}
1844
1845
1846/*
1847 * "Short-cut" sysfs variable to create a new vport on a FC Host.
1848 * Input is a string of the form "<WWPN>:<WWNN>". Other attributes
1849 * will default to a NPIV-based FCP_Initiator; The WWNs are specified
1850 * as hex characters, and may *not* contain any prefixes (e.g. 0x, x, etc)
1851 */
1852static ssize_t
Tony Jonesee959b02008-02-22 00:13:36 +01001853store_fc_host_vport_create(struct device *dev, struct device_attribute *attr,
1854 const char *buf, size_t count)
James Smarta53eb5e2007-04-27 12:41:09 -04001855{
Tony Jonesee959b02008-02-22 00:13:36 +01001856 struct Scsi_Host *shost = transport_class_to_shost(dev);
James Smarta53eb5e2007-04-27 12:41:09 -04001857 struct fc_vport_identifiers vid;
1858 struct fc_vport *vport;
1859 unsigned int cnt=count;
1860 int stat;
1861
1862 memset(&vid, 0, sizeof(vid));
1863
1864 /* count may include a LF at end of string */
1865 if (buf[cnt-1] == '\n')
1866 cnt--;
1867
1868 /* validate we have enough characters for WWPN */
1869 if ((cnt != (16+1+16)) || (buf[16] != ':'))
1870 return -EINVAL;
1871
1872 stat = fc_parse_wwn(&buf[0], &vid.port_name);
1873 if (stat)
1874 return stat;
1875
1876 stat = fc_parse_wwn(&buf[17], &vid.node_name);
1877 if (stat)
1878 return stat;
1879
1880 vid.roles = FC_PORT_ROLE_FCP_INITIATOR;
1881 vid.vport_type = FC_PORTTYPE_NPIV;
1882 /* vid.symbolic_name is already zero/NULL's */
1883 vid.disable = false; /* always enabled */
1884
1885 /* we only allow support on Channel 0 !!! */
Andrew Vasqueza30c3f62008-07-18 08:32:52 -07001886 stat = fc_vport_setup(shost, 0, &shost->shost_gendev, &vid, &vport);
James Smarta53eb5e2007-04-27 12:41:09 -04001887 return stat ? stat : count;
1888}
Tony Jonesee959b02008-02-22 00:13:36 +01001889static FC_DEVICE_ATTR(host, vport_create, S_IWUSR, NULL,
James Smarta53eb5e2007-04-27 12:41:09 -04001890 store_fc_host_vport_create);
1891
1892
1893/*
1894 * "Short-cut" sysfs variable to delete a vport on a FC Host.
1895 * Vport is identified by a string containing "<WWPN>:<WWNN>".
1896 * The WWNs are specified as hex characters, and may *not* contain
1897 * any prefixes (e.g. 0x, x, etc)
1898 */
1899static ssize_t
Tony Jonesee959b02008-02-22 00:13:36 +01001900store_fc_host_vport_delete(struct device *dev, struct device_attribute *attr,
1901 const char *buf, size_t count)
James Smarta53eb5e2007-04-27 12:41:09 -04001902{
Tony Jonesee959b02008-02-22 00:13:36 +01001903 struct Scsi_Host *shost = transport_class_to_shost(dev);
James Smarta53eb5e2007-04-27 12:41:09 -04001904 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1905 struct fc_vport *vport;
1906 u64 wwpn, wwnn;
1907 unsigned long flags;
1908 unsigned int cnt=count;
1909 int stat, match;
1910
1911 /* count may include a LF at end of string */
1912 if (buf[cnt-1] == '\n')
1913 cnt--;
1914
1915 /* validate we have enough characters for WWPN */
1916 if ((cnt != (16+1+16)) || (buf[16] != ':'))
1917 return -EINVAL;
1918
1919 stat = fc_parse_wwn(&buf[0], &wwpn);
1920 if (stat)
1921 return stat;
1922
1923 stat = fc_parse_wwn(&buf[17], &wwnn);
1924 if (stat)
1925 return stat;
1926
1927 spin_lock_irqsave(shost->host_lock, flags);
1928 match = 0;
1929 /* we only allow support on Channel 0 !!! */
1930 list_for_each_entry(vport, &fc_host->vports, peers) {
1931 if ((vport->channel == 0) &&
1932 (vport->port_name == wwpn) && (vport->node_name == wwnn)) {
Gal Rosen0d9dc7c2010-01-21 10:15:32 +02001933 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))
1934 break;
1935 vport->flags |= FC_VPORT_DELETING;
James Smarta53eb5e2007-04-27 12:41:09 -04001936 match = 1;
1937 break;
1938 }
1939 }
1940 spin_unlock_irqrestore(shost->host_lock, flags);
1941
1942 if (!match)
1943 return -ENODEV;
1944
1945 stat = fc_vport_terminate(vport);
1946 return stat ? stat : count;
1947}
Tony Jonesee959b02008-02-22 00:13:36 +01001948static FC_DEVICE_ATTR(host, vport_delete, S_IWUSR, NULL,
James Smarta53eb5e2007-04-27 12:41:09 -04001949 store_fc_host_vport_delete);
1950
1951
Linus Torvalds1da177e2005-04-16 15:20:36 -07001952static int fc_host_match(struct attribute_container *cont,
1953 struct device *dev)
1954{
1955 struct Scsi_Host *shost;
1956 struct fc_internal *i;
1957
1958 if (!scsi_is_host_device(dev))
1959 return 0;
1960
1961 shost = dev_to_shost(dev);
1962 if (!shost->transportt || shost->transportt->host_attrs.ac.class
1963 != &fc_host_class.class)
1964 return 0;
1965
1966 i = to_fc_internal(shost->transportt);
1967
1968 return &i->t.host_attrs.ac == cont;
1969}
1970
1971static int fc_target_match(struct attribute_container *cont,
1972 struct device *dev)
1973{
1974 struct Scsi_Host *shost;
1975 struct fc_internal *i;
1976
1977 if (!scsi_is_target_device(dev))
1978 return 0;
1979
1980 shost = dev_to_shost(dev->parent);
1981 if (!shost->transportt || shost->transportt->host_attrs.ac.class
1982 != &fc_host_class.class)
1983 return 0;
1984
1985 i = to_fc_internal(shost->transportt);
1986
1987 return &i->t.target_attrs.ac == cont;
1988}
1989
1990static void fc_rport_dev_release(struct device *dev)
1991{
1992 struct fc_rport *rport = dev_to_rport(dev);
1993 put_device(dev->parent);
1994 kfree(rport);
1995}
1996
1997int scsi_is_fc_rport(const struct device *dev)
1998{
1999 return dev->release == fc_rport_dev_release;
2000}
2001EXPORT_SYMBOL(scsi_is_fc_rport);
2002
2003static int fc_rport_match(struct attribute_container *cont,
2004 struct device *dev)
2005{
2006 struct Scsi_Host *shost;
2007 struct fc_internal *i;
2008
2009 if (!scsi_is_fc_rport(dev))
2010 return 0;
2011
2012 shost = dev_to_shost(dev->parent);
2013 if (!shost->transportt || shost->transportt->host_attrs.ac.class
2014 != &fc_host_class.class)
2015 return 0;
2016
2017 i = to_fc_internal(shost->transportt);
2018
2019 return &i->rport_attr_cont.ac == cont;
2020}
2021
James.Smart@Emulex.Com5c44cd22005-06-10 22:24:30 -04002022
James Smarta53eb5e2007-04-27 12:41:09 -04002023static void fc_vport_dev_release(struct device *dev)
2024{
2025 struct fc_vport *vport = dev_to_vport(dev);
2026 put_device(dev->parent); /* release kobj parent */
2027 kfree(vport);
2028}
2029
2030int scsi_is_fc_vport(const struct device *dev)
2031{
2032 return dev->release == fc_vport_dev_release;
2033}
2034EXPORT_SYMBOL(scsi_is_fc_vport);
2035
2036static int fc_vport_match(struct attribute_container *cont,
2037 struct device *dev)
2038{
2039 struct fc_vport *vport;
2040 struct Scsi_Host *shost;
2041 struct fc_internal *i;
2042
2043 if (!scsi_is_fc_vport(dev))
2044 return 0;
2045 vport = dev_to_vport(dev);
2046
2047 shost = vport_to_shost(vport);
2048 if (!shost->transportt || shost->transportt->host_attrs.ac.class
2049 != &fc_host_class.class)
2050 return 0;
2051
2052 i = to_fc_internal(shost->transportt);
2053 return &i->vport_attr_cont.ac == cont;
2054}
2055
2056
James Smartc829c392006-03-13 08:28:57 -05002057/**
2058 * fc_timed_out - FC Transport I/O timeout intercept handler
James Smartc829c392006-03-13 08:28:57 -05002059 * @scmd: The SCSI command which timed out
2060 *
2061 * This routine protects against error handlers getting invoked while a
2062 * rport is in a blocked state, typically due to a temporarily loss of
2063 * connectivity. If the error handlers are allowed to proceed, requests
2064 * to abort i/o, reset the target, etc will likely fail as there is no way
2065 * to communicate with the device to perform the requested function. These
2066 * failures may result in the midlayer taking the device offline, requiring
2067 * manual intervention to restore operation.
2068 *
2069 * This routine, called whenever an i/o times out, validates the state of
2070 * the underlying rport. If the rport is blocked, it returns
2071 * EH_RESET_TIMER, which will continue to reschedule the timeout.
2072 * Eventually, either the device will return, or devloss_tmo will fire,
2073 * and when the timeout then fires, it will be handled normally.
2074 * If the rport is not blocked, normal error handling continues.
2075 *
2076 * Notes:
2077 * This routine assumes no locks are held on entry.
Rob Landleyeb448202007-11-03 13:30:39 -05002078 */
Jens Axboe242f9dc2008-09-14 05:55:09 -07002079static enum blk_eh_timer_return
James Smartc829c392006-03-13 08:28:57 -05002080fc_timed_out(struct scsi_cmnd *scmd)
2081{
2082 struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device));
2083
2084 if (rport->port_state == FC_PORTSTATE_BLOCKED)
Jens Axboe242f9dc2008-09-14 05:55:09 -07002085 return BLK_EH_RESET_TIMER;
James Smartc829c392006-03-13 08:28:57 -05002086
Jens Axboe242f9dc2008-09-14 05:55:09 -07002087 return BLK_EH_NOT_HANDLED;
James Smartc829c392006-03-13 08:28:57 -05002088}
2089
James.Smart@Emulex.Com5c44cd22005-06-10 22:24:30 -04002090/*
James Smartbda23252008-04-24 12:12:46 -04002091 * Called by fc_user_scan to locate an rport on the shost that
2092 * matches the channel and target id, and invoke scsi_scan_target()
2093 * on the rport.
James.Smart@Emulex.Com5c44cd22005-06-10 22:24:30 -04002094 */
James Smartbda23252008-04-24 12:12:46 -04002095static void
Hannes Reinecke9cb78c12014-06-25 15:27:36 +02002096fc_user_scan_tgt(struct Scsi_Host *shost, uint channel, uint id, u64 lun)
James.Smart@Emulex.Com5c44cd22005-06-10 22:24:30 -04002097{
2098 struct fc_rport *rport;
James Smartbda23252008-04-24 12:12:46 -04002099 unsigned long flags;
2100
2101 spin_lock_irqsave(shost->host_lock, flags);
James.Smart@Emulex.Com5c44cd22005-06-10 22:24:30 -04002102
Christoph Hellwige02f3f52006-01-13 19:04:00 +01002103 list_for_each_entry(rport, &fc_host_rports(shost), peers) {
2104 if (rport->scsi_target_id == -1)
2105 continue;
James.Smart@Emulex.Com5c44cd22005-06-10 22:24:30 -04002106
Hannes Reinecke0d2fcd92007-06-14 15:16:45 +02002107 if (rport->port_state != FC_PORTSTATE_ONLINE)
2108 continue;
2109
James Smartbda23252008-04-24 12:12:46 -04002110 if ((channel == rport->channel) &&
2111 (id == rport->scsi_target_id)) {
2112 spin_unlock_irqrestore(shost->host_lock, flags);
2113 scsi_scan_target(&rport->dev, channel, id, lun, 1);
2114 return;
Christoph Hellwige02f3f52006-01-13 19:04:00 +01002115 }
2116 }
2117
James Smartbda23252008-04-24 12:12:46 -04002118 spin_unlock_irqrestore(shost->host_lock, flags);
2119}
2120
2121/*
2122 * Called via sysfs scan routines. Necessary, as the FC transport
2123 * wants to place all target objects below the rport object. So this
2124 * routine must invoke the scsi_scan_target() routine with the rport
2125 * object as the parent.
2126 */
2127static int
Hannes Reinecke9cb78c12014-06-25 15:27:36 +02002128fc_user_scan(struct Scsi_Host *shost, uint channel, uint id, u64 lun)
James Smartbda23252008-04-24 12:12:46 -04002129{
2130 uint chlo, chhi;
2131 uint tgtlo, tgthi;
2132
2133 if (((channel != SCAN_WILD_CARD) && (channel > shost->max_channel)) ||
2134 ((id != SCAN_WILD_CARD) && (id >= shost->max_id)) ||
2135 ((lun != SCAN_WILD_CARD) && (lun > shost->max_lun)))
2136 return -EINVAL;
2137
2138 if (channel == SCAN_WILD_CARD) {
2139 chlo = 0;
2140 chhi = shost->max_channel + 1;
2141 } else {
2142 chlo = channel;
2143 chhi = channel + 1;
2144 }
2145
2146 if (id == SCAN_WILD_CARD) {
2147 tgtlo = 0;
2148 tgthi = shost->max_id;
2149 } else {
2150 tgtlo = id;
2151 tgthi = id + 1;
2152 }
2153
2154 for ( ; chlo < chhi; chlo++)
2155 for ( ; tgtlo < tgthi; tgtlo++)
2156 fc_user_scan_tgt(shost, chlo, tgtlo, lun);
2157
Christoph Hellwige02f3f52006-01-13 19:04:00 +01002158 return 0;
James.Smart@Emulex.Com5c44cd22005-06-10 22:24:30 -04002159}
2160
FUJITA Tomonori75252362007-09-01 02:02:27 +09002161static int fc_tsk_mgmt_response(struct Scsi_Host *shost, u64 nexus, u64 tm_id,
2162 int result)
2163{
2164 struct fc_internal *i = to_fc_internal(shost->transportt);
2165 return i->f->tsk_mgmt_response(shost, nexus, tm_id, result);
2166}
2167
2168static int fc_it_nexus_response(struct Scsi_Host *shost, u64 nexus, int result)
2169{
2170 struct fc_internal *i = to_fc_internal(shost->transportt);
2171 return i->f->it_nexus_response(shost, nexus, result);
2172}
2173
Linus Torvalds1da177e2005-04-16 15:20:36 -07002174struct scsi_transport_template *
2175fc_attach_transport(struct fc_function_template *ft)
2176{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002177 int count;
Jes Sorensen24669f752006-01-16 10:31:18 -05002178 struct fc_internal *i = kzalloc(sizeof(struct fc_internal),
2179 GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002180
2181 if (unlikely(!i))
2182 return NULL;
2183
Linus Torvalds1da177e2005-04-16 15:20:36 -07002184 i->t.target_attrs.ac.attrs = &i->starget_attrs[0];
2185 i->t.target_attrs.ac.class = &fc_transport_class.class;
2186 i->t.target_attrs.ac.match = fc_target_match;
2187 i->t.target_size = sizeof(struct fc_starget_attrs);
2188 transport_container_register(&i->t.target_attrs);
2189
2190 i->t.host_attrs.ac.attrs = &i->host_attrs[0];
2191 i->t.host_attrs.ac.class = &fc_host_class.class;
2192 i->t.host_attrs.ac.match = fc_host_match;
2193 i->t.host_size = sizeof(struct fc_host_attrs);
2194 if (ft->get_fc_host_stats)
2195 i->t.host_attrs.statistics = &fc_statistics_group;
2196 transport_container_register(&i->t.host_attrs);
2197
2198 i->rport_attr_cont.ac.attrs = &i->rport_attrs[0];
2199 i->rport_attr_cont.ac.class = &fc_rport_class.class;
2200 i->rport_attr_cont.ac.match = fc_rport_match;
2201 transport_container_register(&i->rport_attr_cont);
2202
James Smarta53eb5e2007-04-27 12:41:09 -04002203 i->vport_attr_cont.ac.attrs = &i->vport_attrs[0];
2204 i->vport_attr_cont.ac.class = &fc_vport_class.class;
2205 i->vport_attr_cont.ac.match = fc_vport_match;
2206 transport_container_register(&i->vport_attr_cont);
2207
Linus Torvalds1da177e2005-04-16 15:20:36 -07002208 i->f = ft;
2209
2210 /* Transport uses the shost workq for scsi scanning */
2211 i->t.create_work_queue = 1;
James.Smart@Emulex.Com5c44cd22005-06-10 22:24:30 -04002212
James Smartc829c392006-03-13 08:28:57 -05002213 i->t.eh_timed_out = fc_timed_out;
2214
Christoph Hellwige02f3f52006-01-13 19:04:00 +01002215 i->t.user_scan = fc_user_scan;
James Smart9ef3e4a2007-05-24 19:04:44 -04002216
FUJITA Tomonori75252362007-09-01 02:02:27 +09002217 /* target-mode drivers' functions */
2218 i->t.tsk_mgmt_response = fc_tsk_mgmt_response;
2219 i->t.it_nexus_response = fc_it_nexus_response;
2220
Linus Torvalds1da177e2005-04-16 15:20:36 -07002221 /*
2222 * Setup SCSI Target Attributes.
2223 */
2224 count = 0;
2225 SETUP_STARGET_ATTRIBUTE_RD(node_name);
2226 SETUP_STARGET_ATTRIBUTE_RD(port_name);
2227 SETUP_STARGET_ATTRIBUTE_RD(port_id);
2228
2229 BUG_ON(count > FC_STARGET_NUM_ATTRS);
2230
2231 i->starget_attrs[count] = NULL;
2232
2233
2234 /*
2235 * Setup SCSI Host Attributes.
2236 */
2237 count=0;
2238 SETUP_HOST_ATTRIBUTE_RD(node_name);
2239 SETUP_HOST_ATTRIBUTE_RD(port_name);
Andreas Herrmann6b7281d2006-01-13 02:16:54 +01002240 SETUP_HOST_ATTRIBUTE_RD(permanent_port_name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002241 SETUP_HOST_ATTRIBUTE_RD(supported_classes);
2242 SETUP_HOST_ATTRIBUTE_RD(supported_fc4s);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002243 SETUP_HOST_ATTRIBUTE_RD(supported_speeds);
2244 SETUP_HOST_ATTRIBUTE_RD(maxframe_size);
James Smarta53eb5e2007-04-27 12:41:09 -04002245 if (ft->vport_create) {
2246 SETUP_HOST_ATTRIBUTE_RD_NS(max_npiv_vports);
2247 SETUP_HOST_ATTRIBUTE_RD_NS(npiv_vports_inuse);
2248 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002249 SETUP_HOST_ATTRIBUTE_RD(serial_number);
Neerav Parikhbb8ef582012-01-22 17:29:50 -08002250 SETUP_HOST_ATTRIBUTE_RD(manufacturer);
2251 SETUP_HOST_ATTRIBUTE_RD(model);
2252 SETUP_HOST_ATTRIBUTE_RD(model_description);
2253 SETUP_HOST_ATTRIBUTE_RD(hardware_version);
2254 SETUP_HOST_ATTRIBUTE_RD(driver_version);
2255 SETUP_HOST_ATTRIBUTE_RD(firmware_version);
2256 SETUP_HOST_ATTRIBUTE_RD(optionrom_version);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002257
2258 SETUP_HOST_ATTRIBUTE_RD(port_id);
2259 SETUP_HOST_ATTRIBUTE_RD(port_type);
2260 SETUP_HOST_ATTRIBUTE_RD(port_state);
2261 SETUP_HOST_ATTRIBUTE_RD(active_fc4s);
2262 SETUP_HOST_ATTRIBUTE_RD(speed);
2263 SETUP_HOST_ATTRIBUTE_RD(fabric_name);
James Smart016131b2006-08-14 08:20:25 -04002264 SETUP_HOST_ATTRIBUTE_RD(symbolic_name);
James Smartb8d08212006-08-17 08:00:43 -04002265 SETUP_HOST_ATTRIBUTE_RW(system_hostname);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002266
2267 /* Transport-managed attributes */
Mike Christie43ca9102010-09-15 16:52:32 -05002268 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(dev_loss_tmo);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002269 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type);
Andrew Vasquez91ca7b02005-10-27 16:03:37 -07002270 if (ft->issue_fc_host_lip)
2271 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip);
James Smarta53eb5e2007-04-27 12:41:09 -04002272 if (ft->vport_create)
2273 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_create);
2274 if (ft->vport_delete)
2275 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_delete);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002276
2277 BUG_ON(count > FC_HOST_NUM_ATTRS);
2278
2279 i->host_attrs[count] = NULL;
2280
2281 /*
2282 * Setup Remote Port Attributes.
2283 */
2284 count=0;
2285 SETUP_RPORT_ATTRIBUTE_RD(maxframe_size);
2286 SETUP_RPORT_ATTRIBUTE_RD(supported_classes);
2287 SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo);
2288 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name);
2289 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name);
2290 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id);
2291 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles);
2292 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_state);
2293 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id);
Mike Christiefff9d402008-08-19 18:45:23 -05002294 SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(fast_io_fail_tmo);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002295
2296 BUG_ON(count > FC_RPORT_NUM_ATTRS);
2297
2298 i->rport_attrs[count] = NULL;
2299
James Smarta53eb5e2007-04-27 12:41:09 -04002300 /*
2301 * Setup Virtual Port Attributes.
2302 */
2303 count=0;
2304 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_state);
2305 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_last_state);
2306 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(node_name);
2307 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(port_name);
2308 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(roles);
2309 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_type);
2310 SETUP_VPORT_ATTRIBUTE_RW(symbolic_name);
2311 SETUP_VPORT_ATTRIBUTE_WR(vport_delete);
2312 SETUP_VPORT_ATTRIBUTE_WR(vport_disable);
2313
2314 BUG_ON(count > FC_VPORT_NUM_ATTRS);
2315
2316 i->vport_attrs[count] = NULL;
2317
Linus Torvalds1da177e2005-04-16 15:20:36 -07002318 return &i->t;
2319}
2320EXPORT_SYMBOL(fc_attach_transport);
2321
2322void fc_release_transport(struct scsi_transport_template *t)
2323{
2324 struct fc_internal *i = to_fc_internal(t);
2325
2326 transport_container_unregister(&i->t.target_attrs);
2327 transport_container_unregister(&i->t.host_attrs);
2328 transport_container_unregister(&i->rport_attr_cont);
James Smarta53eb5e2007-04-27 12:41:09 -04002329 transport_container_unregister(&i->vport_attr_cont);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002330
2331 kfree(i);
2332}
2333EXPORT_SYMBOL(fc_release_transport);
2334
James Smartaedf3492006-04-10 10:14:05 -04002335/**
2336 * fc_queue_work - Queue work to the fc_host workqueue.
2337 * @shost: Pointer to Scsi_Host bound to fc_host.
2338 * @work: Work to queue for execution.
2339 *
2340 * Return value:
James Smarta0785ed2006-05-11 13:27:09 -04002341 * 1 - work queued for execution
2342 * 0 - work is already queued
2343 * -EINVAL - work queue doesn't exist
Rob Landleyeb448202007-11-03 13:30:39 -05002344 */
James Smartaedf3492006-04-10 10:14:05 -04002345static int
2346fc_queue_work(struct Scsi_Host *shost, struct work_struct *work)
2347{
2348 if (unlikely(!fc_host_work_q(shost))) {
2349 printk(KERN_ERR
2350 "ERROR: FC host '%s' attempted to queue work, "
2351 "when no workqueue created.\n", shost->hostt->name);
2352 dump_stack();
2353
2354 return -EINVAL;
2355 }
2356
2357 return queue_work(fc_host_work_q(shost), work);
2358}
2359
2360/**
2361 * fc_flush_work - Flush a fc_host's workqueue.
2362 * @shost: Pointer to Scsi_Host bound to fc_host.
Rob Landleyeb448202007-11-03 13:30:39 -05002363 */
James Smartaedf3492006-04-10 10:14:05 -04002364static void
2365fc_flush_work(struct Scsi_Host *shost)
2366{
2367 if (!fc_host_work_q(shost)) {
2368 printk(KERN_ERR
2369 "ERROR: FC host '%s' attempted to flush work, "
2370 "when no workqueue created.\n", shost->hostt->name);
2371 dump_stack();
2372 return;
2373 }
2374
2375 flush_workqueue(fc_host_work_q(shost));
2376}
2377
2378/**
2379 * fc_queue_devloss_work - Schedule work for the fc_host devloss workqueue.
2380 * @shost: Pointer to Scsi_Host bound to fc_host.
2381 * @work: Work to queue for execution.
2382 * @delay: jiffies to delay the work queuing
2383 *
2384 * Return value:
James Smart0f29b962006-08-18 17:33:29 -04002385 * 1 on success / 0 already queued / < 0 for error
Rob Landleyeb448202007-11-03 13:30:39 -05002386 */
James Smartaedf3492006-04-10 10:14:05 -04002387static int
David Howellsc4028952006-11-22 14:57:56 +00002388fc_queue_devloss_work(struct Scsi_Host *shost, struct delayed_work *work,
James Smartaedf3492006-04-10 10:14:05 -04002389 unsigned long delay)
2390{
2391 if (unlikely(!fc_host_devloss_work_q(shost))) {
2392 printk(KERN_ERR
2393 "ERROR: FC host '%s' attempted to queue work, "
2394 "when no workqueue created.\n", shost->hostt->name);
2395 dump_stack();
2396
2397 return -EINVAL;
2398 }
2399
2400 return queue_delayed_work(fc_host_devloss_work_q(shost), work, delay);
2401}
2402
2403/**
2404 * fc_flush_devloss - Flush a fc_host's devloss workqueue.
2405 * @shost: Pointer to Scsi_Host bound to fc_host.
Rob Landleyeb448202007-11-03 13:30:39 -05002406 */
James Smartaedf3492006-04-10 10:14:05 -04002407static void
2408fc_flush_devloss(struct Scsi_Host *shost)
2409{
2410 if (!fc_host_devloss_work_q(shost)) {
2411 printk(KERN_ERR
2412 "ERROR: FC host '%s' attempted to flush work, "
2413 "when no workqueue created.\n", shost->hostt->name);
2414 dump_stack();
2415 return;
2416 }
2417
2418 flush_workqueue(fc_host_devloss_work_q(shost));
2419}
2420
Linus Torvalds1da177e2005-04-16 15:20:36 -07002421
2422/**
Rob Landleyeb448202007-11-03 13:30:39 -05002423 * fc_remove_host - called to terminate any fc_transport-related elements for a scsi host.
2424 * @shost: Which &Scsi_Host
Linus Torvalds1da177e2005-04-16 15:20:36 -07002425 *
Lucas De Marchi25985ed2011-03-30 22:57:33 -03002426 * This routine is expected to be called immediately preceding the
Linus Torvalds1da177e2005-04-16 15:20:36 -07002427 * a driver's call to scsi_remove_host().
2428 *
2429 * WARNING: A driver utilizing the fc_transport, which fails to call
Rob Landleyeb448202007-11-03 13:30:39 -05002430 * this routine prior to scsi_remove_host(), will leave dangling
Linus Torvalds1da177e2005-04-16 15:20:36 -07002431 * objects in /sys/class/fc_remote_ports. Access to any of these
2432 * objects can result in a system crash !!!
2433 *
2434 * Notes:
2435 * This routine assumes no locks are held on entry.
Rob Landleyeb448202007-11-03 13:30:39 -05002436 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002437void
2438fc_remove_host(struct Scsi_Host *shost)
2439{
James Smarta53eb5e2007-04-27 12:41:09 -04002440 struct fc_vport *vport = NULL, *next_vport = NULL;
2441 struct fc_rport *rport = NULL, *next_rport = NULL;
James Smartaedf3492006-04-10 10:14:05 -04002442 struct workqueue_struct *work_q;
2443 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
James Smarta53eb5e2007-04-27 12:41:09 -04002444 unsigned long flags;
James Smarta53eb5e2007-04-27 12:41:09 -04002445
2446 spin_lock_irqsave(shost->host_lock, flags);
2447
2448 /* Remove any vports */
James Smart9ef3e4a2007-05-24 19:04:44 -04002449 list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers)
2450 fc_queue_work(shost, &vport->vport_delete_work);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002451
2452 /* Remove any remote ports */
2453 list_for_each_entry_safe(rport, next_rport,
James Smartaedf3492006-04-10 10:14:05 -04002454 &fc_host->rports, peers) {
2455 list_del(&rport->peers);
2456 rport->port_state = FC_PORTSTATE_DELETED;
2457 fc_queue_work(shost, &rport->rport_delete_work);
2458 }
2459
Linus Torvalds1da177e2005-04-16 15:20:36 -07002460 list_for_each_entry_safe(rport, next_rport,
James Smartaedf3492006-04-10 10:14:05 -04002461 &fc_host->rport_bindings, peers) {
2462 list_del(&rport->peers);
2463 rport->port_state = FC_PORTSTATE_DELETED;
2464 fc_queue_work(shost, &rport->rport_delete_work);
2465 }
2466
James Smarta53eb5e2007-04-27 12:41:09 -04002467 spin_unlock_irqrestore(shost->host_lock, flags);
2468
James Smartaedf3492006-04-10 10:14:05 -04002469 /* flush all scan work items */
2470 scsi_flush_work(shost);
2471
2472 /* flush all stgt delete, and rport delete work items, then kill it */
2473 if (fc_host->work_q) {
2474 work_q = fc_host->work_q;
2475 fc_host->work_q = NULL;
2476 destroy_workqueue(work_q);
2477 }
2478
2479 /* flush all devloss work items, then kill it */
2480 if (fc_host->devloss_work_q) {
2481 work_q = fc_host->devloss_work_q;
2482 fc_host->devloss_work_q = NULL;
2483 destroy_workqueue(work_q);
2484 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002485}
2486EXPORT_SYMBOL(fc_remove_host);
2487
Mike Christiefff9d402008-08-19 18:45:23 -05002488static void fc_terminate_rport_io(struct fc_rport *rport)
2489{
2490 struct Scsi_Host *shost = rport_to_shost(rport);
2491 struct fc_internal *i = to_fc_internal(shost->transportt);
2492
2493 /* Involve the LLDD if possible to terminate all io on the rport. */
2494 if (i->f->terminate_rport_io)
2495 i->f->terminate_rport_io(rport);
2496
2497 /*
Mike Christie5d9fb5c2012-05-17 23:56:57 -05002498 * Must unblock to flush queued IO. scsi-ml will fail incoming reqs.
Mike Christiefff9d402008-08-19 18:45:23 -05002499 */
Mike Christie5d9fb5c2012-05-17 23:56:57 -05002500 scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE);
Mike Christiefff9d402008-08-19 18:45:23 -05002501}
James Smartaedf3492006-04-10 10:14:05 -04002502
2503/**
Lucas De Marchi25985ed2011-03-30 22:57:33 -03002504 * fc_starget_delete - called to delete the scsi descendants of an rport
David Howellsc4028952006-11-22 14:57:56 +00002505 * @work: remote port to be operated on.
Rob Landleyeb448202007-11-03 13:30:39 -05002506 *
2507 * Deletes target and all sdevs.
2508 */
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04002509static void
David Howellsc4028952006-11-22 14:57:56 +00002510fc_starget_delete(struct work_struct *work)
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04002511{
David Howellsc4028952006-11-22 14:57:56 +00002512 struct fc_rport *rport =
2513 container_of(work, struct fc_rport, stgt_delete_work);
James Smart0f29b962006-08-18 17:33:29 -04002514
Mike Christiefff9d402008-08-19 18:45:23 -05002515 fc_terminate_rport_io(rport);
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04002516 scsi_remove_target(&rport->dev);
2517}
2518
James Smartaedf3492006-04-10 10:14:05 -04002519
2520/**
2521 * fc_rport_final_delete - finish rport termination and delete it.
David Howellsc4028952006-11-22 14:57:56 +00002522 * @work: remote port to be deleted.
Rob Landleyeb448202007-11-03 13:30:39 -05002523 */
James Smartaedf3492006-04-10 10:14:05 -04002524static void
David Howellsc4028952006-11-22 14:57:56 +00002525fc_rport_final_delete(struct work_struct *work)
James Smartaedf3492006-04-10 10:14:05 -04002526{
David Howellsc4028952006-11-22 14:57:56 +00002527 struct fc_rport *rport =
2528 container_of(work, struct fc_rport, rport_delete_work);
James Smartaedf3492006-04-10 10:14:05 -04002529 struct device *dev = &rport->dev;
2530 struct Scsi_Host *shost = rport_to_shost(rport);
James Smart0f29b962006-08-18 17:33:29 -04002531 struct fc_internal *i = to_fc_internal(shost->transportt);
James Smart92740b22007-04-27 11:53:17 -04002532 unsigned long flags;
Michael Reed8798a692009-10-09 14:15:59 -05002533 int do_callback = 0;
James Smartaedf3492006-04-10 10:14:05 -04002534
Nithin Nayak Sujir112f6612011-04-25 12:30:06 -07002535 fc_terminate_rport_io(rport);
2536
James Smartaedf3492006-04-10 10:14:05 -04002537 /*
James Smart9ef3e4a2007-05-24 19:04:44 -04002538 * if a scan is pending, flush the SCSI Host work_q so that
James Smartaedf3492006-04-10 10:14:05 -04002539 * that we can reclaim the rport scan work element.
2540 */
2541 if (rport->flags & FC_RPORT_SCAN_PENDING)
2542 scsi_flush_work(shost);
2543
James Smart92740b22007-04-27 11:53:17 -04002544 /*
2545 * Cancel any outstanding timers. These should really exist
2546 * only when rmmod'ing the LLDD and we're asking for
2547 * immediate termination of the rports
2548 */
2549 spin_lock_irqsave(shost->host_lock, flags);
2550 if (rport->flags & FC_RPORT_DEVLOSS_PENDING) {
2551 spin_unlock_irqrestore(shost->host_lock, flags);
2552 if (!cancel_delayed_work(&rport->fail_io_work))
2553 fc_flush_devloss(shost);
2554 if (!cancel_delayed_work(&rport->dev_loss_work))
2555 fc_flush_devloss(shost);
Neil Horman0353e082014-06-23 10:40:25 -04002556 cancel_work_sync(&rport->scan_work);
James Smart92740b22007-04-27 11:53:17 -04002557 spin_lock_irqsave(shost->host_lock, flags);
2558 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
2559 }
2560 spin_unlock_irqrestore(shost->host_lock, flags);
2561
James Smart0f29b962006-08-18 17:33:29 -04002562 /* Delete SCSI target and sdevs */
2563 if (rport->scsi_target_id != -1)
David Howellsc4028952006-11-22 14:57:56 +00002564 fc_starget_delete(&rport->stgt_delete_work);
James Smart92740b22007-04-27 11:53:17 -04002565
2566 /*
2567 * Notify the driver that the rport is now dead. The LLDD will
2568 * also guarantee that any communication to the rport is terminated
James Smart4be98c02009-01-05 12:14:18 -05002569 *
2570 * Avoid this call if we already called it when we preserved the
2571 * rport for the binding.
James Smart92740b22007-04-27 11:53:17 -04002572 */
Michael Reed8798a692009-10-09 14:15:59 -05002573 spin_lock_irqsave(shost->host_lock, flags);
James Smart4be98c02009-01-05 12:14:18 -05002574 if (!(rport->flags & FC_RPORT_DEVLOSS_CALLBK_DONE) &&
Michael Reed8798a692009-10-09 14:15:59 -05002575 (i->f->dev_loss_tmo_callbk)) {
2576 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE;
2577 do_callback = 1;
2578 }
2579 spin_unlock_irqrestore(shost->host_lock, flags);
2580
2581 if (do_callback)
James Smart0f29b962006-08-18 17:33:29 -04002582 i->f->dev_loss_tmo_callbk(rport);
James Smart0f29b962006-08-18 17:33:29 -04002583
James Smart9e4f5e22009-03-26 13:33:19 -04002584 fc_bsg_remove(rport->rqst_q);
2585
James Smartaedf3492006-04-10 10:14:05 -04002586 transport_remove_device(dev);
2587 device_del(dev);
2588 transport_destroy_device(dev);
James Smart3bdad7b2006-06-26 14:19:59 -04002589 put_device(&shost->shost_gendev); /* for fc_host->rport list */
2590 put_device(dev); /* for self-reference */
James Smartaedf3492006-04-10 10:14:05 -04002591}
2592
2593
Linus Torvalds1da177e2005-04-16 15:20:36 -07002594/**
2595 * fc_rport_create - allocates and creates a remote FC port.
2596 * @shost: scsi host the remote port is connected to.
2597 * @channel: Channel on shost port connected to.
2598 * @ids: The world wide names, fc address, and FC4 port
2599 * roles for the remote port.
2600 *
2601 * Allocates and creates the remoter port structure, including the
2602 * class and sysfs creation.
2603 *
2604 * Notes:
2605 * This routine assumes no locks are held on entry.
Rob Landleyeb448202007-11-03 13:30:39 -05002606 */
Adrian Bunk44818ef2007-07-09 11:59:59 -07002607static struct fc_rport *
Linus Torvalds1da177e2005-04-16 15:20:36 -07002608fc_rport_create(struct Scsi_Host *shost, int channel,
2609 struct fc_rport_identifiers *ids)
2610{
James Smartaedf3492006-04-10 10:14:05 -04002611 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002612 struct fc_internal *fci = to_fc_internal(shost->transportt);
2613 struct fc_rport *rport;
2614 struct device *dev;
2615 unsigned long flags;
2616 int error;
2617 size_t size;
2618
2619 size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size);
Jes Sorensen24669f752006-01-16 10:31:18 -05002620 rport = kzalloc(size, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002621 if (unlikely(!rport)) {
Harvey Harrisoncadbd4a2008-07-03 23:47:27 -07002622 printk(KERN_ERR "%s: allocation failure\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002623 return NULL;
2624 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002625
2626 rport->maxframe_size = -1;
2627 rport->supported_classes = FC_COS_UNSPECIFIED;
Mike Christie43ca9102010-09-15 16:52:32 -05002628 rport->dev_loss_tmo = fc_host->dev_loss_tmo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002629 memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name));
2630 memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name));
2631 rport->port_id = ids->port_id;
2632 rport->roles = ids->roles;
2633 rport->port_state = FC_PORTSTATE_ONLINE;
2634 if (fci->f->dd_fcrport_size)
2635 rport->dd_data = &rport[1];
2636 rport->channel = channel;
James Smart0f29b962006-08-18 17:33:29 -04002637 rport->fast_io_fail_tmo = -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002638
David Howellsc4028952006-11-22 14:57:56 +00002639 INIT_DELAYED_WORK(&rport->dev_loss_work, fc_timeout_deleted_rport);
2640 INIT_DELAYED_WORK(&rport->fail_io_work, fc_timeout_fail_rport_io);
2641 INIT_WORK(&rport->scan_work, fc_scsi_scan_rport);
2642 INIT_WORK(&rport->stgt_delete_work, fc_starget_delete);
2643 INIT_WORK(&rport->rport_delete_work, fc_rport_final_delete);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002644
2645 spin_lock_irqsave(shost->host_lock, flags);
2646
2647 rport->number = fc_host->next_rport_number++;
James Smarta53eb5e2007-04-27 12:41:09 -04002648 if (rport->roles & FC_PORT_ROLE_FCP_TARGET)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002649 rport->scsi_target_id = fc_host->next_target_id++;
2650 else
2651 rport->scsi_target_id = -1;
James Smartaedf3492006-04-10 10:14:05 -04002652 list_add_tail(&rport->peers, &fc_host->rports);
James Smart3bdad7b2006-06-26 14:19:59 -04002653 get_device(&shost->shost_gendev); /* for fc_host->rport list */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002654
2655 spin_unlock_irqrestore(shost->host_lock, flags);
2656
2657 dev = &rport->dev;
James Smart3bdad7b2006-06-26 14:19:59 -04002658 device_initialize(dev); /* takes self reference */
2659 dev->parent = get_device(&shost->shost_gendev); /* parent reference */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002660 dev->release = fc_rport_dev_release;
Kay Sievers71610f52008-12-03 22:41:36 +01002661 dev_set_name(dev, "rport-%d:%d-%d",
2662 shost->host_no, channel, rport->number);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002663 transport_setup_device(dev);
2664
2665 error = device_add(dev);
2666 if (error) {
2667 printk(KERN_ERR "FC Remote Port device_add failed\n");
2668 goto delete_rport;
2669 }
2670 transport_add_device(dev);
2671 transport_configure_device(dev);
2672
James Smart9e4f5e22009-03-26 13:33:19 -04002673 fc_bsg_rportadd(shost, rport);
2674 /* ignore any bsg add error - we just can't do sgio */
2675
James Smarta53eb5e2007-04-27 12:41:09 -04002676 if (rport->roles & FC_PORT_ROLE_FCP_TARGET) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002677 /* initiate a scan of the target */
James Smartaedf3492006-04-10 10:14:05 -04002678 rport->flags |= FC_RPORT_SCAN_PENDING;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002679 scsi_queue_work(shost, &rport->scan_work);
James Smartaedf3492006-04-10 10:14:05 -04002680 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002681
2682 return rport;
2683
2684delete_rport:
2685 transport_destroy_device(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002686 spin_lock_irqsave(shost->host_lock, flags);
2687 list_del(&rport->peers);
James Smart3bdad7b2006-06-26 14:19:59 -04002688 put_device(&shost->shost_gendev); /* for fc_host->rport list */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002689 spin_unlock_irqrestore(shost->host_lock, flags);
2690 put_device(dev->parent);
2691 kfree(rport);
2692 return NULL;
2693}
2694
2695/**
Rob Landleyeb448202007-11-03 13:30:39 -05002696 * fc_remote_port_add - notify fc transport of the existence of a remote FC port.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002697 * @shost: scsi host the remote port is connected to.
2698 * @channel: Channel on shost port connected to.
2699 * @ids: The world wide names, fc address, and FC4 port
2700 * roles for the remote port.
2701 *
2702 * The LLDD calls this routine to notify the transport of the existence
2703 * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn)
2704 * of the port, it's FC address (port_id), and the FC4 roles that are
2705 * active for the port.
2706 *
2707 * For ports that are FCP targets (aka scsi targets), the FC transport
2708 * maintains consistent target id bindings on behalf of the LLDD.
2709 * A consistent target id binding is an assignment of a target id to
2710 * a remote port identifier, which persists while the scsi host is
2711 * attached. The remote port can disappear, then later reappear, and
2712 * it's target id assignment remains the same. This allows for shifts
2713 * in FC addressing (if binding by wwpn or wwnn) with no apparent
2714 * changes to the scsi subsystem which is based on scsi host number and
2715 * target id values. Bindings are only valid during the attachment of
2716 * the scsi host. If the host detaches, then later re-attaches, target
2717 * id bindings may change.
2718 *
2719 * This routine is responsible for returning a remote port structure.
2720 * The routine will search the list of remote ports it maintains
2721 * internally on behalf of consistent target id mappings. If found, the
2722 * remote port structure will be reused. Otherwise, a new remote port
2723 * structure will be allocated.
2724 *
2725 * Whenever a remote port is allocated, a new fc_remote_port class
2726 * device is created.
2727 *
2728 * Should not be called from interrupt context.
2729 *
2730 * Notes:
2731 * This routine assumes no locks are held on entry.
Rob Landleyeb448202007-11-03 13:30:39 -05002732 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002733struct fc_rport *
2734fc_remote_port_add(struct Scsi_Host *shost, int channel,
2735 struct fc_rport_identifiers *ids)
2736{
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04002737 struct fc_internal *fci = to_fc_internal(shost->transportt);
James Smartaedf3492006-04-10 10:14:05 -04002738 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002739 struct fc_rport *rport;
2740 unsigned long flags;
2741 int match = 0;
2742
James Smartaedf3492006-04-10 10:14:05 -04002743 /* ensure any stgt delete functions are done */
2744 fc_flush_work(shost);
2745
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04002746 /*
2747 * Search the list of "active" rports, for an rport that has been
2748 * deleted, but we've held off the real delete while the target
2749 * is in a "blocked" state.
2750 */
2751 spin_lock_irqsave(shost->host_lock, flags);
2752
James Smartaedf3492006-04-10 10:14:05 -04002753 list_for_each_entry(rport, &fc_host->rports, peers) {
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04002754
2755 if ((rport->port_state == FC_PORTSTATE_BLOCKED) &&
2756 (rport->channel == channel)) {
2757
James Smartaedf3492006-04-10 10:14:05 -04002758 switch (fc_host->tgtid_bind_type) {
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04002759 case FC_TGTID_BIND_BY_WWPN:
2760 case FC_TGTID_BIND_NONE:
2761 if (rport->port_name == ids->port_name)
2762 match = 1;
2763 break;
2764 case FC_TGTID_BIND_BY_WWNN:
2765 if (rport->node_name == ids->node_name)
2766 match = 1;
2767 break;
2768 case FC_TGTID_BIND_BY_ID:
2769 if (rport->port_id == ids->port_id)
2770 match = 1;
2771 break;
2772 }
2773
2774 if (match) {
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04002775
2776 memcpy(&rport->node_name, &ids->node_name,
2777 sizeof(rport->node_name));
2778 memcpy(&rport->port_name, &ids->port_name,
2779 sizeof(rport->port_name));
2780 rport->port_id = ids->port_id;
2781
2782 rport->port_state = FC_PORTSTATE_ONLINE;
2783 rport->roles = ids->roles;
2784
2785 spin_unlock_irqrestore(shost->host_lock, flags);
2786
2787 if (fci->f->dd_fcrport_size)
2788 memset(rport->dd_data, 0,
2789 fci->f->dd_fcrport_size);
2790
2791 /*
James Smart92740b22007-04-27 11:53:17 -04002792 * If we were not a target, cancel the
2793 * io terminate and rport timers, and
2794 * we're done.
2795 *
2796 * If we were a target, but our new role
2797 * doesn't indicate a target, leave the
2798 * timers running expecting the role to
2799 * change as the target fully logs in. If
2800 * it doesn't, the target will be torn down.
2801 *
2802 * If we were a target, and our role shows
2803 * we're still a target, cancel the timers
2804 * and kick off a scan.
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04002805 */
James Smart92740b22007-04-27 11:53:17 -04002806
2807 /* was a target, not in roles */
2808 if ((rport->scsi_target_id != -1) &&
James Smarta53eb5e2007-04-27 12:41:09 -04002809 (!(ids->roles & FC_PORT_ROLE_FCP_TARGET)))
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04002810 return rport;
2811
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04002812 /*
James Smart92740b22007-04-27 11:53:17 -04002813 * Stop the fail io and dev_loss timers.
2814 * If they flush, the port_state will
2815 * be checked and will NOOP the function.
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04002816 */
James Smart0f29b962006-08-18 17:33:29 -04002817 if (!cancel_delayed_work(&rport->fail_io_work))
2818 fc_flush_devloss(shost);
James Smart92740b22007-04-27 11:53:17 -04002819 if (!cancel_delayed_work(&rport->dev_loss_work))
James Smartaedf3492006-04-10 10:14:05 -04002820 fc_flush_devloss(shost);
2821
2822 spin_lock_irqsave(shost->host_lock, flags);
2823
Mike Christiefff9d402008-08-19 18:45:23 -05002824 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT |
James Smart4be98c02009-01-05 12:14:18 -05002825 FC_RPORT_DEVLOSS_PENDING |
2826 FC_RPORT_DEVLOSS_CALLBK_DONE);
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04002827
Mike Christie8fb2ef82012-04-15 21:47:50 -05002828 spin_unlock_irqrestore(shost->host_lock, flags);
2829
James Smart92740b22007-04-27 11:53:17 -04002830 /* if target, initiate a scan */
2831 if (rport->scsi_target_id != -1) {
Mike Christie5d9fb5c2012-05-17 23:56:57 -05002832 scsi_target_unblock(&rport->dev,
2833 SDEV_RUNNING);
Mike Christie8fb2ef82012-04-15 21:47:50 -05002834 spin_lock_irqsave(shost->host_lock,
2835 flags);
James Smart92740b22007-04-27 11:53:17 -04002836 rport->flags |= FC_RPORT_SCAN_PENDING;
2837 scsi_queue_work(shost,
2838 &rport->scan_work);
2839 spin_unlock_irqrestore(shost->host_lock,
2840 flags);
Mike Christie8fb2ef82012-04-15 21:47:50 -05002841 }
James Smarta0785ed2006-05-11 13:27:09 -04002842
James Smart9e4f5e22009-03-26 13:33:19 -04002843 fc_bsg_goose_queue(rport);
2844
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04002845 return rport;
2846 }
2847 }
2848 }
2849
James Smart92740b22007-04-27 11:53:17 -04002850 /*
2851 * Search the bindings array
2852 * Note: if never a FCP target, you won't be on this list
2853 */
James Smartaedf3492006-04-10 10:14:05 -04002854 if (fc_host->tgtid_bind_type != FC_TGTID_BIND_NONE) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002855
2856 /* search for a matching consistent binding */
2857
James Smartaedf3492006-04-10 10:14:05 -04002858 list_for_each_entry(rport, &fc_host->rport_bindings,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002859 peers) {
2860 if (rport->channel != channel)
2861 continue;
2862
James Smartaedf3492006-04-10 10:14:05 -04002863 switch (fc_host->tgtid_bind_type) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002864 case FC_TGTID_BIND_BY_WWPN:
2865 if (rport->port_name == ids->port_name)
2866 match = 1;
2867 break;
2868 case FC_TGTID_BIND_BY_WWNN:
2869 if (rport->node_name == ids->node_name)
2870 match = 1;
2871 break;
2872 case FC_TGTID_BIND_BY_ID:
2873 if (rport->port_id == ids->port_id)
2874 match = 1;
2875 break;
2876 case FC_TGTID_BIND_NONE: /* to keep compiler happy */
2877 break;
2878 }
2879
2880 if (match) {
James Smartaedf3492006-04-10 10:14:05 -04002881 list_move_tail(&rport->peers, &fc_host->rports);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002882 break;
2883 }
2884 }
2885
Linus Torvalds1da177e2005-04-16 15:20:36 -07002886 if (match) {
2887 memcpy(&rport->node_name, &ids->node_name,
2888 sizeof(rport->node_name));
2889 memcpy(&rport->port_name, &ids->port_name,
2890 sizeof(rport->port_name));
2891 rport->port_id = ids->port_id;
2892 rport->roles = ids->roles;
2893 rport->port_state = FC_PORTSTATE_ONLINE;
Mike Christiefff9d402008-08-19 18:45:23 -05002894 rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002895
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04002896 if (fci->f->dd_fcrport_size)
2897 memset(rport->dd_data, 0,
2898 fci->f->dd_fcrport_size);
Mike Christie8fb2ef82012-04-15 21:47:50 -05002899 spin_unlock_irqrestore(shost->host_lock, flags);
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04002900
Mike Christie8fb2ef82012-04-15 21:47:50 -05002901 if (ids->roles & FC_PORT_ROLE_FCP_TARGET) {
Mike Christie5d9fb5c2012-05-17 23:56:57 -05002902 scsi_target_unblock(&rport->dev, SDEV_RUNNING);
Mike Christie8fb2ef82012-04-15 21:47:50 -05002903
Linus Torvalds1da177e2005-04-16 15:20:36 -07002904 /* initiate a scan of the target */
Mike Christie8fb2ef82012-04-15 21:47:50 -05002905 spin_lock_irqsave(shost->host_lock, flags);
James Smartaedf3492006-04-10 10:14:05 -04002906 rport->flags |= FC_RPORT_SCAN_PENDING;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002907 scsi_queue_work(shost, &rport->scan_work);
James Smarta0785ed2006-05-11 13:27:09 -04002908 spin_unlock_irqrestore(shost->host_lock, flags);
Mike Christie8fb2ef82012-04-15 21:47:50 -05002909 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002910 return rport;
2911 }
2912 }
2913
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04002914 spin_unlock_irqrestore(shost->host_lock, flags);
2915
Linus Torvalds1da177e2005-04-16 15:20:36 -07002916 /* No consistent binding found - create new remote port entry */
2917 rport = fc_rport_create(shost, channel, ids);
2918
2919 return rport;
2920}
2921EXPORT_SYMBOL(fc_remote_port_add);
2922
Linus Torvalds1da177e2005-04-16 15:20:36 -07002923
2924/**
Rob Landleyeb448202007-11-03 13:30:39 -05002925 * fc_remote_port_delete - notifies the fc transport that a remote port is no longer in existence.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002926 * @rport: The remote port that no longer exists
2927 *
2928 * The LLDD calls this routine to notify the transport that a remote
2929 * port is no longer part of the topology. Note: Although a port
2930 * may no longer be part of the topology, it may persist in the remote
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04002931 * ports displayed by the fc_host. We do this under 2 conditions:
Rob Landleyeb448202007-11-03 13:30:39 -05002932 * 1) If the port was a scsi target, we delay its deletion by "blocking" it.
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04002933 * This allows the port to temporarily disappear, then reappear without
2934 * disrupting the SCSI device tree attached to it. During the "blocked"
2935 * period the port will still exist.
Rob Landleyeb448202007-11-03 13:30:39 -05002936 * 2) If the port was a scsi target and disappears for longer than we
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04002937 * expect, we'll delete the port and the tear down the SCSI device tree
2938 * attached to it. However, we want to semi-persist the target id assigned
2939 * to that port if it eventually does exist. The port structure will
2940 * remain (although with minimal information) so that the target id
2941 * bindings remails.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002942 *
2943 * If the remote port is not an FCP Target, it will be fully torn down
2944 * and deallocated, including the fc_remote_port class device.
2945 *
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04002946 * If the remote port is an FCP Target, the port will be placed in a
2947 * temporary blocked state. From the LLDD's perspective, the rport no
2948 * longer exists. From the SCSI midlayer's perspective, the SCSI target
2949 * exists, but all sdevs on it are blocked from further I/O. The following
Rob Landleyeb448202007-11-03 13:30:39 -05002950 * is then expected.
2951 *
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04002952 * If the remote port does not return (signaled by a LLDD call to
2953 * fc_remote_port_add()) within the dev_loss_tmo timeout, then the
2954 * scsi target is removed - killing all outstanding i/o and removing the
2955 * scsi devices attached ot it. The port structure will be marked Not
2956 * Present and be partially cleared, leaving only enough information to
2957 * recognize the remote port relative to the scsi target id binding if
2958 * it later appears. The port will remain as long as there is a valid
2959 * binding (e.g. until the user changes the binding type or unloads the
2960 * scsi host with the binding).
Linus Torvalds1da177e2005-04-16 15:20:36 -07002961 *
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04002962 * If the remote port returns within the dev_loss_tmo value (and matches
2963 * according to the target id binding type), the port structure will be
2964 * reused. If it is no longer a SCSI target, the target will be torn
2965 * down. If it continues to be a SCSI target, then the target will be
2966 * unblocked (allowing i/o to be resumed), and a scan will be activated
2967 * to ensure that all luns are detected.
2968 *
2969 * Called from normal process context only - cannot be called from interrupt.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002970 *
2971 * Notes:
2972 * This routine assumes no locks are held on entry.
Rob Landleyeb448202007-11-03 13:30:39 -05002973 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002974void
2975fc_remote_port_delete(struct fc_rport *rport)
2976{
James Smartaedf3492006-04-10 10:14:05 -04002977 struct Scsi_Host *shost = rport_to_shost(rport);
Hannes Reinecke36dd2882010-03-09 10:18:48 +01002978 unsigned long timeout = rport->dev_loss_tmo;
James Smartaedf3492006-04-10 10:14:05 -04002979 unsigned long flags;
2980
2981 /*
2982 * No need to flush the fc_host work_q's, as all adds are synchronous.
2983 *
2984 * We do need to reclaim the rport scan work element, so eventually
2985 * (in fc_rport_final_delete()) we'll flush the scsi host work_q if
2986 * there's still a scan pending.
2987 */
2988
2989 spin_lock_irqsave(shost->host_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002990
James Smart92740b22007-04-27 11:53:17 -04002991 if (rport->port_state != FC_PORTSTATE_ONLINE) {
James Smartaedf3492006-04-10 10:14:05 -04002992 spin_unlock_irqrestore(shost->host_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002993 return;
2994 }
2995
James Smart92740b22007-04-27 11:53:17 -04002996 /*
2997 * In the past, we if this was not an FCP-Target, we would
2998 * unconditionally just jump to deleting the rport.
2999 * However, rports can be used as node containers by the LLDD,
3000 * and its not appropriate to just terminate the rport at the
3001 * first sign of a loss in connectivity. The LLDD may want to
3002 * send ELS traffic to re-validate the login. If the rport is
3003 * immediately deleted, it makes it inappropriate for a node
3004 * container.
3005 * So... we now unconditionally wait dev_loss_tmo before
3006 * destroying an rport.
3007 */
3008
James Smartaedf3492006-04-10 10:14:05 -04003009 rport->port_state = FC_PORTSTATE_BLOCKED;
3010
3011 rport->flags |= FC_RPORT_DEVLOSS_PENDING;
3012
3013 spin_unlock_irqrestore(shost->host_lock, flags);
3014
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04003015 scsi_target_block(&rport->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003016
James Smart0f29b962006-08-18 17:33:29 -04003017 /* see if we need to kill io faster than waiting for device loss */
3018 if ((rport->fast_io_fail_tmo != -1) &&
Mike Christiefff9d402008-08-19 18:45:23 -05003019 (rport->fast_io_fail_tmo < timeout))
James Smart0f29b962006-08-18 17:33:29 -04003020 fc_queue_devloss_work(shost, &rport->fail_io_work,
3021 rport->fast_io_fail_tmo * HZ);
3022
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04003023 /* cap the length the devices can be blocked until they are deleted */
James Smartaedf3492006-04-10 10:14:05 -04003024 fc_queue_devloss_work(shost, &rport->dev_loss_work, timeout * HZ);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003025}
3026EXPORT_SYMBOL(fc_remote_port_delete);
3027
3028/**
Rob Landleyeb448202007-11-03 13:30:39 -05003029 * fc_remote_port_rolechg - notifies the fc transport that the roles on a remote may have changed.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003030 * @rport: The remote port that changed.
Rob Landleyeb448202007-11-03 13:30:39 -05003031 * @roles: New roles for this port.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003032 *
Rob Landleyeb448202007-11-03 13:30:39 -05003033 * Description: The LLDD calls this routine to notify the transport that the
3034 * roles on a remote port may have changed. The largest effect of this is
Linus Torvalds1da177e2005-04-16 15:20:36 -07003035 * if a port now becomes a FCP Target, it must be allocated a
3036 * scsi target id. If the port is no longer a FCP target, any
3037 * scsi target id value assigned to it will persist in case the
3038 * role changes back to include FCP Target. No changes in the scsi
3039 * midlayer will be invoked if the role changes (in the expectation
3040 * that the role will be resumed. If it doesn't normal error processing
3041 * will take place).
3042 *
3043 * Should not be called from interrupt context.
3044 *
3045 * Notes:
3046 * This routine assumes no locks are held on entry.
Rob Landleyeb448202007-11-03 13:30:39 -05003047 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003048void
3049fc_remote_port_rolechg(struct fc_rport *rport, u32 roles)
3050{
3051 struct Scsi_Host *shost = rport_to_shost(rport);
James Smartaedf3492006-04-10 10:14:05 -04003052 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003053 unsigned long flags;
3054 int create = 0;
3055
Linus Torvalds1da177e2005-04-16 15:20:36 -07003056 spin_lock_irqsave(shost->host_lock, flags);
James Smarta53eb5e2007-04-27 12:41:09 -04003057 if (roles & FC_PORT_ROLE_FCP_TARGET) {
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04003058 if (rport->scsi_target_id == -1) {
3059 rport->scsi_target_id = fc_host->next_target_id++;
3060 create = 1;
James Smarta53eb5e2007-04-27 12:41:09 -04003061 } else if (!(rport->roles & FC_PORT_ROLE_FCP_TARGET))
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04003062 create = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003063 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003064
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04003065 rport->roles = roles;
3066
James Smartaedf3492006-04-10 10:14:05 -04003067 spin_unlock_irqrestore(shost->host_lock, flags);
3068
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04003069 if (create) {
3070 /*
3071 * There may have been a delete timer running on the
3072 * port. Ensure that it is cancelled as we now know
3073 * the port is an FCP Target.
3074 * Note: we know the rport is exists and in an online
3075 * state as the LLDD would not have had an rport
3076 * reference to pass us.
3077 *
3078 * Take no action on the del_timer failure as the state
3079 * machine state change will validate the
3080 * transaction.
3081 */
James Smart0f29b962006-08-18 17:33:29 -04003082 if (!cancel_delayed_work(&rport->fail_io_work))
3083 fc_flush_devloss(shost);
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04003084 if (!cancel_delayed_work(&rport->dev_loss_work))
James Smartaedf3492006-04-10 10:14:05 -04003085 fc_flush_devloss(shost);
3086
3087 spin_lock_irqsave(shost->host_lock, flags);
Mike Christiefff9d402008-08-19 18:45:23 -05003088 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT |
James Smart0eecee42011-11-03 11:10:40 -04003089 FC_RPORT_DEVLOSS_PENDING |
3090 FC_RPORT_DEVLOSS_CALLBK_DONE);
James Smartaedf3492006-04-10 10:14:05 -04003091 spin_unlock_irqrestore(shost->host_lock, flags);
3092
3093 /* ensure any stgt delete functions are done */
3094 fc_flush_work(shost);
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04003095
Mike Christie5d9fb5c2012-05-17 23:56:57 -05003096 scsi_target_unblock(&rport->dev, SDEV_RUNNING);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003097 /* initiate a scan of the target */
James Smartaedf3492006-04-10 10:14:05 -04003098 spin_lock_irqsave(shost->host_lock, flags);
3099 rport->flags |= FC_RPORT_SCAN_PENDING;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003100 scsi_queue_work(shost, &rport->scan_work);
James Smartaedf3492006-04-10 10:14:05 -04003101 spin_unlock_irqrestore(shost->host_lock, flags);
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04003102 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003103}
3104EXPORT_SYMBOL(fc_remote_port_rolechg);
3105
3106/**
Rob Landleyeb448202007-11-03 13:30:39 -05003107 * fc_timeout_deleted_rport - Timeout handler for a deleted remote port.
James Smart92740b22007-04-27 11:53:17 -04003108 * @work: rport target that failed to reappear in the allotted time.
Rob Landleyeb448202007-11-03 13:30:39 -05003109 *
3110 * Description: An attempt to delete a remote port blocks, and if it fails
3111 * to return in the allotted time this gets called.
3112 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003113static void
David Howellsc4028952006-11-22 14:57:56 +00003114fc_timeout_deleted_rport(struct work_struct *work)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003115{
David Howellsc4028952006-11-22 14:57:56 +00003116 struct fc_rport *rport =
3117 container_of(work, struct fc_rport, dev_loss_work.work);
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04003118 struct Scsi_Host *shost = rport_to_shost(rport);
James Smart4be98c02009-01-05 12:14:18 -05003119 struct fc_internal *i = to_fc_internal(shost->transportt);
James Smartaedf3492006-04-10 10:14:05 -04003120 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04003121 unsigned long flags;
Michael Reed8798a692009-10-09 14:15:59 -05003122 int do_callback = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003123
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04003124 spin_lock_irqsave(shost->host_lock, flags);
3125
James Smartaedf3492006-04-10 10:14:05 -04003126 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
3127
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04003128 /*
James Smart92740b22007-04-27 11:53:17 -04003129 * If the port is ONLINE, then it came back. If it was a SCSI
3130 * target, validate it still is. If not, tear down the
3131 * scsi_target on it.
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04003132 */
James Smartaedf3492006-04-10 10:14:05 -04003133 if ((rport->port_state == FC_PORTSTATE_ONLINE) &&
James Smart92740b22007-04-27 11:53:17 -04003134 (rport->scsi_target_id != -1) &&
James Smarta53eb5e2007-04-27 12:41:09 -04003135 !(rport->roles & FC_PORT_ROLE_FCP_TARGET)) {
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04003136 dev_printk(KERN_ERR, &rport->dev,
James Smartaedf3492006-04-10 10:14:05 -04003137 "blocked FC remote port time out: no longer"
3138 " a FCP target, removing starget\n");
James Smartaedf3492006-04-10 10:14:05 -04003139 spin_unlock_irqrestore(shost->host_lock, flags);
Mike Christie5d9fb5c2012-05-17 23:56:57 -05003140 scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE);
James Smarta0785ed2006-05-11 13:27:09 -04003141 fc_queue_work(shost, &rport->stgt_delete_work);
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04003142 return;
3143 }
3144
James Smart92740b22007-04-27 11:53:17 -04003145 /* NOOP state - we're flushing workq's */
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04003146 if (rport->port_state != FC_PORTSTATE_BLOCKED) {
3147 spin_unlock_irqrestore(shost->host_lock, flags);
3148 dev_printk(KERN_ERR, &rport->dev,
James Smart92740b22007-04-27 11:53:17 -04003149 "blocked FC remote port time out: leaving"
3150 " rport%s alone\n",
3151 (rport->scsi_target_id != -1) ? " and starget" : "");
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04003152 return;
3153 }
3154
James Smart92740b22007-04-27 11:53:17 -04003155 if ((fc_host->tgtid_bind_type == FC_TGTID_BIND_NONE) ||
3156 (rport->scsi_target_id == -1)) {
James Smartaedf3492006-04-10 10:14:05 -04003157 list_del(&rport->peers);
3158 rport->port_state = FC_PORTSTATE_DELETED;
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04003159 dev_printk(KERN_ERR, &rport->dev,
James Smart92740b22007-04-27 11:53:17 -04003160 "blocked FC remote port time out: removing"
3161 " rport%s\n",
3162 (rport->scsi_target_id != -1) ? " and starget" : "");
James Smartaedf3492006-04-10 10:14:05 -04003163 fc_queue_work(shost, &rport->rport_delete_work);
3164 spin_unlock_irqrestore(shost->host_lock, flags);
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04003165 return;
3166 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003167
3168 dev_printk(KERN_ERR, &rport->dev,
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04003169 "blocked FC remote port time out: removing target and "
3170 "saving binding\n");
3171
James Smartaedf3492006-04-10 10:14:05 -04003172 list_move_tail(&rport->peers, &fc_host->rport_bindings);
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04003173
3174 /*
3175 * Note: We do not remove or clear the hostdata area. This allows
3176 * host-specific target data to persist along with the
3177 * scsi_target_id. It's up to the host to manage it's hostdata area.
3178 */
3179
3180 /*
3181 * Reinitialize port attributes that may change if the port comes back.
3182 */
3183 rport->maxframe_size = -1;
3184 rport->supported_classes = FC_COS_UNSPECIFIED;
James Smarta53eb5e2007-04-27 12:41:09 -04003185 rport->roles = FC_PORT_ROLE_UNKNOWN;
James Smartaedf3492006-04-10 10:14:05 -04003186 rport->port_state = FC_PORTSTATE_NOTPRESENT;
Mike Christiefff9d402008-08-19 18:45:23 -05003187 rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT;
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04003188
James Smartf78badb2008-12-05 16:29:59 -06003189 /*
3190 * Pre-emptively kill I/O rather than waiting for the work queue
3191 * item to teardown the starget. (FCOE libFC folks prefer this
3192 * and to have the rport_port_id still set when it's done).
3193 */
3194 spin_unlock_irqrestore(shost->host_lock, flags);
3195 fc_terminate_rport_io(rport);
3196
Michael Reed8798a692009-10-09 14:15:59 -05003197 spin_lock_irqsave(shost->host_lock, flags);
James Smartf78badb2008-12-05 16:29:59 -06003198
Michael Reed8798a692009-10-09 14:15:59 -05003199 if (rport->port_state == FC_PORTSTATE_NOTPRESENT) { /* still missing */
3200
3201 /* remove the identifiers that aren't used in the consisting binding */
3202 switch (fc_host->tgtid_bind_type) {
3203 case FC_TGTID_BIND_BY_WWPN:
3204 rport->node_name = -1;
3205 rport->port_id = -1;
3206 break;
3207 case FC_TGTID_BIND_BY_WWNN:
3208 rport->port_name = -1;
3209 rport->port_id = -1;
3210 break;
3211 case FC_TGTID_BIND_BY_ID:
3212 rport->node_name = -1;
3213 rport->port_name = -1;
3214 break;
3215 case FC_TGTID_BIND_NONE: /* to keep compiler happy */
3216 break;
3217 }
3218
3219 /*
3220 * As this only occurs if the remote port (scsi target)
3221 * went away and didn't come back - we'll remove
3222 * all attached scsi devices.
3223 */
3224 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE;
3225 fc_queue_work(shost, &rport->stgt_delete_work);
3226
3227 do_callback = 1;
James.Smart@Emulex.Com19a7b4a2005-10-18 12:03:35 -04003228 }
3229
Michael Reed8798a692009-10-09 14:15:59 -05003230 spin_unlock_irqrestore(shost->host_lock, flags);
James Smart4be98c02009-01-05 12:14:18 -05003231
3232 /*
3233 * Notify the driver that the rport is now dead. The LLDD will
3234 * also guarantee that any communication to the rport is terminated
3235 *
3236 * Note: we set the CALLBK_DONE flag above to correspond
3237 */
Michael Reed8798a692009-10-09 14:15:59 -05003238 if (do_callback && i->f->dev_loss_tmo_callbk)
James Smart4be98c02009-01-05 12:14:18 -05003239 i->f->dev_loss_tmo_callbk(rport);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003240}
3241
James Smart4be98c02009-01-05 12:14:18 -05003242
Linus Torvalds1da177e2005-04-16 15:20:36 -07003243/**
Rob Landleyeb448202007-11-03 13:30:39 -05003244 * fc_timeout_fail_rport_io - Timeout handler for a fast io failing on a disconnected SCSI target.
David Howellsc4028952006-11-22 14:57:56 +00003245 * @work: rport to terminate io on.
James Smart0f29b962006-08-18 17:33:29 -04003246 *
3247 * Notes: Only requests the failure of the io, not that all are flushed
3248 * prior to returning.
Rob Landleyeb448202007-11-03 13:30:39 -05003249 */
James Smart0f29b962006-08-18 17:33:29 -04003250static void
David Howellsc4028952006-11-22 14:57:56 +00003251fc_timeout_fail_rport_io(struct work_struct *work)
James Smart0f29b962006-08-18 17:33:29 -04003252{
David Howellsc4028952006-11-22 14:57:56 +00003253 struct fc_rport *rport =
3254 container_of(work, struct fc_rport, fail_io_work.work);
James Smart0f29b962006-08-18 17:33:29 -04003255
3256 if (rport->port_state != FC_PORTSTATE_BLOCKED)
3257 return;
3258
Mike Christiefff9d402008-08-19 18:45:23 -05003259 rport->flags |= FC_RPORT_FAST_FAIL_TIMEDOUT;
3260 fc_terminate_rport_io(rport);
James Smart0f29b962006-08-18 17:33:29 -04003261}
3262
3263/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07003264 * fc_scsi_scan_rport - called to perform a scsi scan on a remote port.
David Howellsc4028952006-11-22 14:57:56 +00003265 * @work: remote port to be scanned.
Rob Landleyeb448202007-11-03 13:30:39 -05003266 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003267static void
David Howellsc4028952006-11-22 14:57:56 +00003268fc_scsi_scan_rport(struct work_struct *work)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003269{
David Howellsc4028952006-11-22 14:57:56 +00003270 struct fc_rport *rport =
3271 container_of(work, struct fc_rport, scan_work);
James Smartaedf3492006-04-10 10:14:05 -04003272 struct Scsi_Host *shost = rport_to_shost(rport);
Christof Schmitt03f002f2007-08-28 09:31:21 +02003273 struct fc_internal *i = to_fc_internal(shost->transportt);
James.Smart@Emulex.Com42e33142005-12-15 09:56:22 -05003274 unsigned long flags;
3275
James Smartaedf3492006-04-10 10:14:05 -04003276 if ((rport->port_state == FC_PORTSTATE_ONLINE) &&
Christof Schmitt03f002f2007-08-28 09:31:21 +02003277 (rport->roles & FC_PORT_ROLE_FCP_TARGET) &&
3278 !(i->f->disable_target_scan)) {
James Smartaedf3492006-04-10 10:14:05 -04003279 scsi_scan_target(&rport->dev, rport->channel,
3280 rport->scsi_target_id, SCAN_WILD_CARD, 1);
James.Smart@Emulex.Com42e33142005-12-15 09:56:22 -05003281 }
James Smartaedf3492006-04-10 10:14:05 -04003282
3283 spin_lock_irqsave(shost->host_lock, flags);
3284 rport->flags &= ~FC_RPORT_SCAN_PENDING;
James.Smart@Emulex.Com42e33142005-12-15 09:56:22 -05003285 spin_unlock_irqrestore(shost->host_lock, flags);
3286}
3287
Christof Schmitt65d430f2009-10-30 17:59:29 +01003288/**
3289 * fc_block_scsi_eh - Block SCSI eh thread for blocked fc_rport
3290 * @cmnd: SCSI command that scsi_eh is trying to recover
3291 *
3292 * This routine can be called from a FC LLD scsi_eh callback. It
3293 * blocks the scsi_eh thread until the fc_rport leaves the
Christof Schmitt2f2eb582010-03-24 16:50:30 +01003294 * FC_PORTSTATE_BLOCKED, or the fast_io_fail_tmo fires. This is
3295 * necessary to avoid the scsi_eh failing recovery actions for blocked
3296 * rports which would lead to offlined SCSI devices.
3297 *
3298 * Returns: 0 if the fc_rport left the state FC_PORTSTATE_BLOCKED.
3299 * FAST_IO_FAIL if the fast_io_fail_tmo fired, this should be
3300 * passed back to scsi_eh.
Christof Schmitt65d430f2009-10-30 17:59:29 +01003301 */
Christof Schmitt2f2eb582010-03-24 16:50:30 +01003302int fc_block_scsi_eh(struct scsi_cmnd *cmnd)
Christof Schmitt65d430f2009-10-30 17:59:29 +01003303{
3304 struct Scsi_Host *shost = cmnd->device->host;
3305 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
3306 unsigned long flags;
3307
3308 spin_lock_irqsave(shost->host_lock, flags);
Christof Schmitt2f2eb582010-03-24 16:50:30 +01003309 while (rport->port_state == FC_PORTSTATE_BLOCKED &&
3310 !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)) {
Christof Schmitt65d430f2009-10-30 17:59:29 +01003311 spin_unlock_irqrestore(shost->host_lock, flags);
3312 msleep(1000);
3313 spin_lock_irqsave(shost->host_lock, flags);
3314 }
3315 spin_unlock_irqrestore(shost->host_lock, flags);
Christof Schmitt2f2eb582010-03-24 16:50:30 +01003316
3317 if (rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)
3318 return FAST_IO_FAIL;
3319
3320 return 0;
Christof Schmitt65d430f2009-10-30 17:59:29 +01003321}
3322EXPORT_SYMBOL(fc_block_scsi_eh);
James.Smart@Emulex.Com42e33142005-12-15 09:56:22 -05003323
James Smarta53eb5e2007-04-27 12:41:09 -04003324/**
Andrew Vasqueza30c3f62008-07-18 08:32:52 -07003325 * fc_vport_setup - allocates and creates a FC virtual port.
James Smarta53eb5e2007-04-27 12:41:09 -04003326 * @shost: scsi host the virtual port is connected to.
3327 * @channel: Channel on shost port connected to.
3328 * @pdev: parent device for vport
3329 * @ids: The world wide names, FC4 port roles, etc for
3330 * the virtual port.
3331 * @ret_vport: The pointer to the created vport.
3332 *
3333 * Allocates and creates the vport structure, calls the parent host
3334 * to instantiate the vport, the completes w/ class and sysfs creation.
3335 *
3336 * Notes:
3337 * This routine assumes no locks are held on entry.
Rob Landleyeb448202007-11-03 13:30:39 -05003338 */
James Smarta53eb5e2007-04-27 12:41:09 -04003339static int
Andrew Vasqueza30c3f62008-07-18 08:32:52 -07003340fc_vport_setup(struct Scsi_Host *shost, int channel, struct device *pdev,
James Smarta53eb5e2007-04-27 12:41:09 -04003341 struct fc_vport_identifiers *ids, struct fc_vport **ret_vport)
3342{
3343 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3344 struct fc_internal *fci = to_fc_internal(shost->transportt);
3345 struct fc_vport *vport;
3346 struct device *dev;
3347 unsigned long flags;
3348 size_t size;
3349 int error;
3350
3351 *ret_vport = NULL;
3352
3353 if ( ! fci->f->vport_create)
3354 return -ENOENT;
3355
3356 size = (sizeof(struct fc_vport) + fci->f->dd_fcvport_size);
3357 vport = kzalloc(size, GFP_KERNEL);
3358 if (unlikely(!vport)) {
Harvey Harrisoncadbd4a2008-07-03 23:47:27 -07003359 printk(KERN_ERR "%s: allocation failure\n", __func__);
James Smarta53eb5e2007-04-27 12:41:09 -04003360 return -ENOMEM;
3361 }
3362
3363 vport->vport_state = FC_VPORT_UNKNOWN;
3364 vport->vport_last_state = FC_VPORT_UNKNOWN;
3365 vport->node_name = ids->node_name;
3366 vport->port_name = ids->port_name;
3367 vport->roles = ids->roles;
3368 vport->vport_type = ids->vport_type;
3369 if (fci->f->dd_fcvport_size)
3370 vport->dd_data = &vport[1];
3371 vport->shost = shost;
3372 vport->channel = channel;
3373 vport->flags = FC_VPORT_CREATING;
James Smart9ef3e4a2007-05-24 19:04:44 -04003374 INIT_WORK(&vport->vport_delete_work, fc_vport_sched_delete);
James Smarta53eb5e2007-04-27 12:41:09 -04003375
3376 spin_lock_irqsave(shost->host_lock, flags);
3377
3378 if (fc_host->npiv_vports_inuse >= fc_host->max_npiv_vports) {
3379 spin_unlock_irqrestore(shost->host_lock, flags);
3380 kfree(vport);
3381 return -ENOSPC;
3382 }
3383 fc_host->npiv_vports_inuse++;
3384 vport->number = fc_host->next_vport_number++;
3385 list_add_tail(&vport->peers, &fc_host->vports);
3386 get_device(&shost->shost_gendev); /* for fc_host->vport list */
3387
3388 spin_unlock_irqrestore(shost->host_lock, flags);
3389
3390 dev = &vport->dev;
3391 device_initialize(dev); /* takes self reference */
3392 dev->parent = get_device(pdev); /* takes parent reference */
3393 dev->release = fc_vport_dev_release;
Kay Sievers71610f52008-12-03 22:41:36 +01003394 dev_set_name(dev, "vport-%d:%d-%d",
3395 shost->host_no, channel, vport->number);
James Smarta53eb5e2007-04-27 12:41:09 -04003396 transport_setup_device(dev);
3397
3398 error = device_add(dev);
3399 if (error) {
3400 printk(KERN_ERR "FC Virtual Port device_add failed\n");
3401 goto delete_vport;
3402 }
3403 transport_add_device(dev);
3404 transport_configure_device(dev);
3405
3406 error = fci->f->vport_create(vport, ids->disable);
3407 if (error) {
3408 printk(KERN_ERR "FC Virtual Port LLDD Create failed\n");
3409 goto delete_vport_all;
3410 }
3411
3412 /*
3413 * if the parent isn't the physical adapter's Scsi_Host, ensure
3414 * the Scsi_Host at least contains ia symlink to the vport.
3415 */
3416 if (pdev != &shost->shost_gendev) {
3417 error = sysfs_create_link(&shost->shost_gendev.kobj,
Kay Sievers71610f52008-12-03 22:41:36 +01003418 &dev->kobj, dev_name(dev));
James Smarta53eb5e2007-04-27 12:41:09 -04003419 if (error)
3420 printk(KERN_ERR
3421 "%s: Cannot create vport symlinks for "
3422 "%s, err=%d\n",
Kay Sievers71610f52008-12-03 22:41:36 +01003423 __func__, dev_name(dev), error);
James Smarta53eb5e2007-04-27 12:41:09 -04003424 }
3425 spin_lock_irqsave(shost->host_lock, flags);
3426 vport->flags &= ~FC_VPORT_CREATING;
3427 spin_unlock_irqrestore(shost->host_lock, flags);
3428
3429 dev_printk(KERN_NOTICE, pdev,
Kay Sievers71610f52008-12-03 22:41:36 +01003430 "%s created via shost%d channel %d\n", dev_name(dev),
James Smarta53eb5e2007-04-27 12:41:09 -04003431 shost->host_no, channel);
3432
3433 *ret_vport = vport;
3434
3435 return 0;
3436
3437delete_vport_all:
3438 transport_remove_device(dev);
3439 device_del(dev);
3440delete_vport:
3441 transport_destroy_device(dev);
3442 spin_lock_irqsave(shost->host_lock, flags);
3443 list_del(&vport->peers);
3444 put_device(&shost->shost_gendev); /* for fc_host->vport list */
3445 fc_host->npiv_vports_inuse--;
3446 spin_unlock_irqrestore(shost->host_lock, flags);
3447 put_device(dev->parent);
3448 kfree(vport);
3449
3450 return error;
3451}
3452
Andrew Vasqueza30c3f62008-07-18 08:32:52 -07003453/**
3454 * fc_vport_create - Admin App or LLDD requests creation of a vport
3455 * @shost: scsi host the virtual port is connected to.
3456 * @channel: channel on shost port connected to.
3457 * @ids: The world wide names, FC4 port roles, etc for
3458 * the virtual port.
3459 *
3460 * Notes:
3461 * This routine assumes no locks are held on entry.
3462 */
3463struct fc_vport *
3464fc_vport_create(struct Scsi_Host *shost, int channel,
3465 struct fc_vport_identifiers *ids)
3466{
3467 int stat;
3468 struct fc_vport *vport;
3469
3470 stat = fc_vport_setup(shost, channel, &shost->shost_gendev,
3471 ids, &vport);
3472 return stat ? NULL : vport;
3473}
3474EXPORT_SYMBOL(fc_vport_create);
James Smarta53eb5e2007-04-27 12:41:09 -04003475
3476/**
3477 * fc_vport_terminate - Admin App or LLDD requests termination of a vport
3478 * @vport: fc_vport to be terminated
3479 *
3480 * Calls the LLDD vport_delete() function, then deallocates and removes
3481 * the vport from the shost and object tree.
3482 *
3483 * Notes:
3484 * This routine assumes no locks are held on entry.
Rob Landleyeb448202007-11-03 13:30:39 -05003485 */
James Smarta53eb5e2007-04-27 12:41:09 -04003486int
3487fc_vport_terminate(struct fc_vport *vport)
3488{
3489 struct Scsi_Host *shost = vport_to_shost(vport);
3490 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3491 struct fc_internal *i = to_fc_internal(shost->transportt);
3492 struct device *dev = &vport->dev;
3493 unsigned long flags;
3494 int stat;
3495
James Smarta53eb5e2007-04-27 12:41:09 -04003496 if (i->f->vport_delete)
3497 stat = i->f->vport_delete(vport);
3498 else
3499 stat = -ENOENT;
3500
3501 spin_lock_irqsave(shost->host_lock, flags);
3502 vport->flags &= ~FC_VPORT_DELETING;
3503 if (!stat) {
3504 vport->flags |= FC_VPORT_DELETED;
3505 list_del(&vport->peers);
3506 fc_host->npiv_vports_inuse--;
3507 put_device(&shost->shost_gendev); /* for fc_host->vport list */
3508 }
3509 spin_unlock_irqrestore(shost->host_lock, flags);
3510
3511 if (stat)
3512 return stat;
3513
3514 if (dev->parent != &shost->shost_gendev)
Kay Sievers71610f52008-12-03 22:41:36 +01003515 sysfs_remove_link(&shost->shost_gendev.kobj, dev_name(dev));
James Smarta53eb5e2007-04-27 12:41:09 -04003516 transport_remove_device(dev);
3517 device_del(dev);
3518 transport_destroy_device(dev);
3519
3520 /*
3521 * Removing our self-reference should mean our
3522 * release function gets called, which will drop the remaining
3523 * parent reference and free the data structure.
3524 */
3525 put_device(dev); /* for self-reference */
3526
3527 return 0; /* SUCCESS */
3528}
3529EXPORT_SYMBOL(fc_vport_terminate);
3530
James Smart9ef3e4a2007-05-24 19:04:44 -04003531/**
3532 * fc_vport_sched_delete - workq-based delete request for a vport
James Smart9ef3e4a2007-05-24 19:04:44 -04003533 * @work: vport to be deleted.
Rob Landleyeb448202007-11-03 13:30:39 -05003534 */
James Smart9ef3e4a2007-05-24 19:04:44 -04003535static void
3536fc_vport_sched_delete(struct work_struct *work)
3537{
3538 struct fc_vport *vport =
3539 container_of(work, struct fc_vport, vport_delete_work);
3540 int stat;
James Smarta53eb5e2007-04-27 12:41:09 -04003541
James Smart9ef3e4a2007-05-24 19:04:44 -04003542 stat = fc_vport_terminate(vport);
3543 if (stat)
3544 dev_printk(KERN_ERR, vport->dev.parent,
3545 "%s: %s could not be deleted created via "
Harvey Harrisoncadbd4a2008-07-03 23:47:27 -07003546 "shost%d channel %d - error %d\n", __func__,
Kay Sievers71610f52008-12-03 22:41:36 +01003547 dev_name(&vport->dev), vport->shost->host_no,
James Smart9ef3e4a2007-05-24 19:04:44 -04003548 vport->channel, stat);
3549}
3550
3551
James Smart9e4f5e22009-03-26 13:33:19 -04003552/*
3553 * BSG support
3554 */
3555
3556
3557/**
3558 * fc_destroy_bsgjob - routine to teardown/delete a fc bsg job
3559 * @job: fc_bsg_job that is to be torn down
3560 */
3561static void
3562fc_destroy_bsgjob(struct fc_bsg_job *job)
3563{
3564 unsigned long flags;
3565
3566 spin_lock_irqsave(&job->job_lock, flags);
3567 if (job->ref_cnt) {
3568 spin_unlock_irqrestore(&job->job_lock, flags);
3569 return;
3570 }
3571 spin_unlock_irqrestore(&job->job_lock, flags);
3572
3573 put_device(job->dev); /* release reference for the request */
3574
3575 kfree(job->request_payload.sg_list);
3576 kfree(job->reply_payload.sg_list);
3577 kfree(job);
3578}
3579
James Smart9e4f5e22009-03-26 13:33:19 -04003580/**
3581 * fc_bsg_jobdone - completion routine for bsg requests that the LLD has
3582 * completed
3583 * @job: fc_bsg_job that is complete
3584 */
3585static void
3586fc_bsg_jobdone(struct fc_bsg_job *job)
3587{
3588 struct request *req = job->req;
3589 struct request *rsp = req->next_rq;
James Smart9e4f5e22009-03-26 13:33:19 -04003590 int err;
3591
James Smart9e4f5e22009-03-26 13:33:19 -04003592 err = job->req->errors = job->reply->result;
Giridhar Malavalib5c6f772009-06-19 16:26:53 -07003593
James Smart9e4f5e22009-03-26 13:33:19 -04003594 if (err < 0)
3595 /* we're only returning the result field in the reply */
3596 job->req->sense_len = sizeof(uint32_t);
3597 else
3598 job->req->sense_len = job->reply_len;
3599
3600 /* we assume all request payload was transferred, residual == 0 */
3601 req->resid_len = 0;
3602
3603 if (rsp) {
3604 WARN_ON(job->reply->reply_payload_rcv_len > rsp->resid_len);
3605
3606 /* set reply (bidi) residual */
3607 rsp->resid_len -= min(job->reply->reply_payload_rcv_len,
3608 rsp->resid_len);
3609 }
Giridhar Malavalib5c6f772009-06-19 16:26:53 -07003610 blk_complete_request(req);
James Smart9e4f5e22009-03-26 13:33:19 -04003611}
3612
Giridhar Malavalib5c6f772009-06-19 16:26:53 -07003613/**
3614 * fc_bsg_softirq_done - softirq done routine for destroying the bsg requests
Randy Dunlapfe5d20c2009-07-04 13:10:41 -07003615 * @rq: BSG request that holds the job to be destroyed
Giridhar Malavalib5c6f772009-06-19 16:26:53 -07003616 */
3617static void fc_bsg_softirq_done(struct request *rq)
3618{
3619 struct fc_bsg_job *job = rq->special;
3620 unsigned long flags;
3621
3622 spin_lock_irqsave(&job->job_lock, flags);
3623 job->state_flags |= FC_RQST_STATE_DONE;
3624 job->ref_cnt--;
3625 spin_unlock_irqrestore(&job->job_lock, flags);
3626
3627 blk_end_request_all(rq, rq->errors);
3628 fc_destroy_bsgjob(job);
3629}
James Smart9e4f5e22009-03-26 13:33:19 -04003630
3631/**
3632 * fc_bsg_job_timeout - handler for when a bsg request timesout
3633 * @req: request that timed out
3634 */
3635static enum blk_eh_timer_return
3636fc_bsg_job_timeout(struct request *req)
3637{
3638 struct fc_bsg_job *job = (void *) req->special;
3639 struct Scsi_Host *shost = job->shost;
3640 struct fc_internal *i = to_fc_internal(shost->transportt);
3641 unsigned long flags;
3642 int err = 0, done = 0;
3643
3644 if (job->rport && job->rport->port_state == FC_PORTSTATE_BLOCKED)
3645 return BLK_EH_RESET_TIMER;
3646
3647 spin_lock_irqsave(&job->job_lock, flags);
3648 if (job->state_flags & FC_RQST_STATE_DONE)
3649 done = 1;
3650 else
3651 job->ref_cnt++;
3652 spin_unlock_irqrestore(&job->job_lock, flags);
3653
3654 if (!done && i->f->bsg_timeout) {
3655 /* call LLDD to abort the i/o as it has timed out */
3656 err = i->f->bsg_timeout(job);
Swen Schilligb8f08642010-01-14 17:19:00 +01003657 if (err == -EAGAIN) {
3658 job->ref_cnt--;
3659 return BLK_EH_RESET_TIMER;
3660 } else if (err)
James Smart9e4f5e22009-03-26 13:33:19 -04003661 printk(KERN_ERR "ERROR: FC BSG request timeout - LLD "
3662 "abort failed with status %d\n", err);
3663 }
3664
James Smart9e4f5e22009-03-26 13:33:19 -04003665 /* the blk_end_sync_io() doesn't check the error */
Giridhar Malavali47e7e892009-06-19 16:26:54 -07003666 if (done)
3667 return BLK_EH_NOT_HANDLED;
3668 else
3669 return BLK_EH_HANDLED;
James Smart9e4f5e22009-03-26 13:33:19 -04003670}
3671
James Smart9e4f5e22009-03-26 13:33:19 -04003672static int
3673fc_bsg_map_buffer(struct fc_bsg_buffer *buf, struct request *req)
3674{
3675 size_t sz = (sizeof(struct scatterlist) * req->nr_phys_segments);
3676
3677 BUG_ON(!req->nr_phys_segments);
3678
3679 buf->sg_list = kzalloc(sz, GFP_KERNEL);
3680 if (!buf->sg_list)
3681 return -ENOMEM;
3682 sg_init_table(buf->sg_list, req->nr_phys_segments);
3683 buf->sg_cnt = blk_rq_map_sg(req->q, req, buf->sg_list);
3684 buf->payload_len = blk_rq_bytes(req);
3685 return 0;
3686}
3687
3688
3689/**
3690 * fc_req_to_bsgjob - Allocate/create the fc_bsg_job structure for the
3691 * bsg request
3692 * @shost: SCSI Host corresponding to the bsg object
3693 * @rport: (optional) FC Remote Port corresponding to the bsg object
3694 * @req: BSG request that needs a job structure
3695 */
3696static int
3697fc_req_to_bsgjob(struct Scsi_Host *shost, struct fc_rport *rport,
3698 struct request *req)
3699{
3700 struct fc_internal *i = to_fc_internal(shost->transportt);
3701 struct request *rsp = req->next_rq;
3702 struct fc_bsg_job *job;
3703 int ret;
3704
3705 BUG_ON(req->special);
3706
3707 job = kzalloc(sizeof(struct fc_bsg_job) + i->f->dd_bsg_size,
3708 GFP_KERNEL);
3709 if (!job)
3710 return -ENOMEM;
3711
3712 /*
3713 * Note: this is a bit silly.
3714 * The request gets formatted as a SGIO v4 ioctl request, which
3715 * then gets reformatted as a blk request, which then gets
3716 * reformatted as a fc bsg request. And on completion, we have
3717 * to wrap return results such that SGIO v4 thinks it was a scsi
3718 * status. I hope this was all worth it.
3719 */
3720
3721 req->special = job;
3722 job->shost = shost;
3723 job->rport = rport;
3724 job->req = req;
3725 if (i->f->dd_bsg_size)
3726 job->dd_data = (void *)&job[1];
3727 spin_lock_init(&job->job_lock);
3728 job->request = (struct fc_bsg_request *)req->cmd;
3729 job->request_len = req->cmd_len;
3730 job->reply = req->sense;
3731 job->reply_len = SCSI_SENSE_BUFFERSIZE; /* Size of sense buffer
3732 * allocated */
3733 if (req->bio) {
3734 ret = fc_bsg_map_buffer(&job->request_payload, req);
3735 if (ret)
3736 goto failjob_rls_job;
3737 }
3738 if (rsp && rsp->bio) {
3739 ret = fc_bsg_map_buffer(&job->reply_payload, rsp);
3740 if (ret)
3741 goto failjob_rls_rqst_payload;
3742 }
3743 job->job_done = fc_bsg_jobdone;
3744 if (rport)
3745 job->dev = &rport->dev;
3746 else
3747 job->dev = &shost->shost_gendev;
3748 get_device(job->dev); /* take a reference for the request */
3749
3750 job->ref_cnt = 1;
3751
3752 return 0;
3753
3754
3755failjob_rls_rqst_payload:
3756 kfree(job->request_payload.sg_list);
3757failjob_rls_job:
3758 kfree(job);
3759 return -ENOMEM;
3760}
3761
3762
3763enum fc_dispatch_result {
3764 FC_DISPATCH_BREAK, /* on return, q is locked, break from q loop */
3765 FC_DISPATCH_LOCKED, /* on return, q is locked, continue on */
3766 FC_DISPATCH_UNLOCKED, /* on return, q is unlocked, continue on */
3767};
3768
3769
3770/**
3771 * fc_bsg_host_dispatch - process fc host bsg requests and dispatch to LLDD
Randy Dunlap54159072009-06-18 19:39:57 -07003772 * @q: fc host request queue
James Smart9e4f5e22009-03-26 13:33:19 -04003773 * @shost: scsi host rport attached to
3774 * @job: bsg job to be processed
3775 */
3776static enum fc_dispatch_result
3777fc_bsg_host_dispatch(struct request_queue *q, struct Scsi_Host *shost,
3778 struct fc_bsg_job *job)
3779{
3780 struct fc_internal *i = to_fc_internal(shost->transportt);
3781 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */
3782 int ret;
3783
3784 /* Validate the host command */
3785 switch (job->request->msgcode) {
3786 case FC_BSG_HST_ADD_RPORT:
3787 cmdlen += sizeof(struct fc_bsg_host_add_rport);
3788 break;
3789
3790 case FC_BSG_HST_DEL_RPORT:
3791 cmdlen += sizeof(struct fc_bsg_host_del_rport);
3792 break;
3793
3794 case FC_BSG_HST_ELS_NOLOGIN:
3795 cmdlen += sizeof(struct fc_bsg_host_els);
3796 /* there better be a xmt and rcv payloads */
3797 if ((!job->request_payload.payload_len) ||
3798 (!job->reply_payload.payload_len)) {
3799 ret = -EINVAL;
3800 goto fail_host_msg;
3801 }
3802 break;
3803
3804 case FC_BSG_HST_CT:
3805 cmdlen += sizeof(struct fc_bsg_host_ct);
3806 /* there better be xmt and rcv payloads */
3807 if ((!job->request_payload.payload_len) ||
3808 (!job->reply_payload.payload_len)) {
3809 ret = -EINVAL;
3810 goto fail_host_msg;
3811 }
3812 break;
3813
3814 case FC_BSG_HST_VENDOR:
3815 cmdlen += sizeof(struct fc_bsg_host_vendor);
3816 if ((shost->hostt->vendor_id == 0L) ||
3817 (job->request->rqst_data.h_vendor.vendor_id !=
3818 shost->hostt->vendor_id)) {
3819 ret = -ESRCH;
3820 goto fail_host_msg;
3821 }
3822 break;
3823
3824 default:
3825 ret = -EBADR;
3826 goto fail_host_msg;
3827 }
3828
3829 /* check if we really have all the request data needed */
3830 if (job->request_len < cmdlen) {
3831 ret = -ENOMSG;
3832 goto fail_host_msg;
3833 }
3834
3835 ret = i->f->bsg_request(job);
3836 if (!ret)
3837 return FC_DISPATCH_UNLOCKED;
3838
3839fail_host_msg:
3840 /* return the errno failure code as the only status */
3841 BUG_ON(job->reply_len < sizeof(uint32_t));
Brian King61ec33e2009-10-19 10:53:36 -05003842 job->reply->reply_payload_rcv_len = 0;
James Smart9e4f5e22009-03-26 13:33:19 -04003843 job->reply->result = ret;
3844 job->reply_len = sizeof(uint32_t);
3845 fc_bsg_jobdone(job);
3846 return FC_DISPATCH_UNLOCKED;
3847}
3848
3849
3850/*
3851 * fc_bsg_goose_queue - restart rport queue in case it was stopped
3852 * @rport: rport to be restarted
3853 */
3854static void
3855fc_bsg_goose_queue(struct fc_rport *rport)
3856{
James Smart9e4f5e22009-03-26 13:33:19 -04003857 if (!rport->rqst_q)
3858 return;
3859
Jens Axboec21e6be2011-04-19 13:32:46 +02003860 /*
3861 * This get/put dance makes no sense
3862 */
James Smart9e4f5e22009-03-26 13:33:19 -04003863 get_device(&rport->dev);
Jens Axboec21e6be2011-04-19 13:32:46 +02003864 blk_run_queue_async(rport->rqst_q);
James Smart9e4f5e22009-03-26 13:33:19 -04003865 put_device(&rport->dev);
3866}
3867
James Smart9e4f5e22009-03-26 13:33:19 -04003868/**
3869 * fc_bsg_rport_dispatch - process rport bsg requests and dispatch to LLDD
Randy Dunlap54159072009-06-18 19:39:57 -07003870 * @q: rport request queue
James Smart9e4f5e22009-03-26 13:33:19 -04003871 * @shost: scsi host rport attached to
3872 * @rport: rport request destined to
3873 * @job: bsg job to be processed
3874 */
3875static enum fc_dispatch_result
3876fc_bsg_rport_dispatch(struct request_queue *q, struct Scsi_Host *shost,
3877 struct fc_rport *rport, struct fc_bsg_job *job)
3878{
3879 struct fc_internal *i = to_fc_internal(shost->transportt);
3880 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */
3881 int ret;
3882
3883 /* Validate the rport command */
3884 switch (job->request->msgcode) {
3885 case FC_BSG_RPT_ELS:
3886 cmdlen += sizeof(struct fc_bsg_rport_els);
3887 goto check_bidi;
3888
3889 case FC_BSG_RPT_CT:
3890 cmdlen += sizeof(struct fc_bsg_rport_ct);
3891check_bidi:
3892 /* there better be xmt and rcv payloads */
3893 if ((!job->request_payload.payload_len) ||
3894 (!job->reply_payload.payload_len)) {
3895 ret = -EINVAL;
3896 goto fail_rport_msg;
3897 }
3898 break;
3899 default:
3900 ret = -EBADR;
3901 goto fail_rport_msg;
3902 }
3903
3904 /* check if we really have all the request data needed */
3905 if (job->request_len < cmdlen) {
3906 ret = -ENOMSG;
3907 goto fail_rport_msg;
3908 }
3909
3910 ret = i->f->bsg_request(job);
3911 if (!ret)
3912 return FC_DISPATCH_UNLOCKED;
3913
3914fail_rport_msg:
3915 /* return the errno failure code as the only status */
3916 BUG_ON(job->reply_len < sizeof(uint32_t));
Brian King61ec33e2009-10-19 10:53:36 -05003917 job->reply->reply_payload_rcv_len = 0;
James Smart9e4f5e22009-03-26 13:33:19 -04003918 job->reply->result = ret;
3919 job->reply_len = sizeof(uint32_t);
3920 fc_bsg_jobdone(job);
3921 return FC_DISPATCH_UNLOCKED;
3922}
3923
3924
3925/**
3926 * fc_bsg_request_handler - generic handler for bsg requests
3927 * @q: request queue to manage
3928 * @shost: Scsi_Host related to the bsg object
3929 * @rport: FC remote port related to the bsg object (optional)
3930 * @dev: device structure for bsg object
3931 */
3932static void
3933fc_bsg_request_handler(struct request_queue *q, struct Scsi_Host *shost,
3934 struct fc_rport *rport, struct device *dev)
3935{
3936 struct request *req;
3937 struct fc_bsg_job *job;
3938 enum fc_dispatch_result ret;
3939
3940 if (!get_device(dev))
3941 return;
3942
Jens Axboe7eaceac2011-03-10 08:52:07 +01003943 while (1) {
Mike Christie2bc1c592009-11-05 11:18:09 -06003944 if (rport && (rport->port_state == FC_PORTSTATE_BLOCKED) &&
3945 !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT))
3946 break;
James Smart9e4f5e22009-03-26 13:33:19 -04003947
3948 req = blk_fetch_request(q);
3949 if (!req)
3950 break;
3951
3952 if (rport && (rport->port_state != FC_PORTSTATE_ONLINE)) {
3953 req->errors = -ENXIO;
3954 spin_unlock_irq(q->queue_lock);
Sarang Radked88a7142010-03-10 04:03:04 -06003955 blk_end_request_all(req, -ENXIO);
James Smart9e4f5e22009-03-26 13:33:19 -04003956 spin_lock_irq(q->queue_lock);
3957 continue;
3958 }
3959
3960 spin_unlock_irq(q->queue_lock);
3961
3962 ret = fc_req_to_bsgjob(shost, rport, req);
3963 if (ret) {
3964 req->errors = ret;
Sarang Radked88a7142010-03-10 04:03:04 -06003965 blk_end_request_all(req, ret);
James Smart9e4f5e22009-03-26 13:33:19 -04003966 spin_lock_irq(q->queue_lock);
3967 continue;
3968 }
3969
3970 job = req->special;
3971
3972 /* check if we have the msgcode value at least */
3973 if (job->request_len < sizeof(uint32_t)) {
3974 BUG_ON(job->reply_len < sizeof(uint32_t));
Brian King61ec33e2009-10-19 10:53:36 -05003975 job->reply->reply_payload_rcv_len = 0;
James Smart9e4f5e22009-03-26 13:33:19 -04003976 job->reply->result = -ENOMSG;
3977 job->reply_len = sizeof(uint32_t);
3978 fc_bsg_jobdone(job);
3979 spin_lock_irq(q->queue_lock);
3980 continue;
3981 }
3982
3983 /* the dispatch routines will unlock the queue_lock */
3984 if (rport)
3985 ret = fc_bsg_rport_dispatch(q, shost, rport, job);
3986 else
3987 ret = fc_bsg_host_dispatch(q, shost, job);
3988
3989 /* did dispatcher hit state that can't process any more */
3990 if (ret == FC_DISPATCH_BREAK)
3991 break;
3992
3993 /* did dispatcher had released the lock */
3994 if (ret == FC_DISPATCH_UNLOCKED)
3995 spin_lock_irq(q->queue_lock);
3996 }
3997
3998 spin_unlock_irq(q->queue_lock);
3999 put_device(dev);
4000 spin_lock_irq(q->queue_lock);
4001}
4002
4003
4004/**
4005 * fc_bsg_host_handler - handler for bsg requests for a fc host
4006 * @q: fc host request queue
4007 */
4008static void
4009fc_bsg_host_handler(struct request_queue *q)
4010{
4011 struct Scsi_Host *shost = q->queuedata;
4012
4013 fc_bsg_request_handler(q, shost, NULL, &shost->shost_gendev);
4014}
4015
4016
4017/**
4018 * fc_bsg_rport_handler - handler for bsg requests for a fc rport
4019 * @q: rport request queue
4020 */
4021static void
4022fc_bsg_rport_handler(struct request_queue *q)
4023{
4024 struct fc_rport *rport = q->queuedata;
4025 struct Scsi_Host *shost = rport_to_shost(rport);
4026
4027 fc_bsg_request_handler(q, shost, rport, &rport->dev);
4028}
4029
4030
4031/**
4032 * fc_bsg_hostadd - Create and add the bsg hooks so we can receive requests
4033 * @shost: shost for fc_host
4034 * @fc_host: fc_host adding the structures to
4035 */
4036static int
4037fc_bsg_hostadd(struct Scsi_Host *shost, struct fc_host_attrs *fc_host)
4038{
4039 struct device *dev = &shost->shost_gendev;
4040 struct fc_internal *i = to_fc_internal(shost->transportt);
4041 struct request_queue *q;
4042 int err;
James Bottomley3c559ea2009-06-21 12:11:43 -05004043 char bsg_name[20];
James Smart9e4f5e22009-03-26 13:33:19 -04004044
4045 fc_host->rqst_q = NULL;
4046
4047 if (!i->f->bsg_request)
4048 return -ENOTSUPP;
4049
4050 snprintf(bsg_name, sizeof(bsg_name),
4051 "fc_host%d", shost->host_no);
4052
4053 q = __scsi_alloc_queue(shost, fc_bsg_host_handler);
4054 if (!q) {
4055 printk(KERN_ERR "fc_host%d: bsg interface failed to "
4056 "initialize - no request queue\n",
4057 shost->host_no);
4058 return -ENOMEM;
4059 }
4060
4061 q->queuedata = shost;
4062 queue_flag_set_unlocked(QUEUE_FLAG_BIDI, q);
Giridhar Malavalib5c6f772009-06-19 16:26:53 -07004063 blk_queue_softirq_done(q, fc_bsg_softirq_done);
James Smart9e4f5e22009-03-26 13:33:19 -04004064 blk_queue_rq_timed_out(q, fc_bsg_job_timeout);
4065 blk_queue_rq_timeout(q, FC_DEFAULT_BSG_TIMEOUT);
4066
4067 err = bsg_register_queue(q, dev, bsg_name, NULL);
4068 if (err) {
4069 printk(KERN_ERR "fc_host%d: bsg interface failed to "
4070 "initialize - register queue\n",
4071 shost->host_no);
4072 blk_cleanup_queue(q);
4073 return err;
4074 }
4075
4076 fc_host->rqst_q = q;
4077 return 0;
4078}
4079
4080
4081/**
4082 * fc_bsg_rportadd - Create and add the bsg hooks so we can receive requests
4083 * @shost: shost that rport is attached to
4084 * @rport: rport that the bsg hooks are being attached to
4085 */
4086static int
4087fc_bsg_rportadd(struct Scsi_Host *shost, struct fc_rport *rport)
4088{
4089 struct device *dev = &rport->dev;
4090 struct fc_internal *i = to_fc_internal(shost->transportt);
4091 struct request_queue *q;
4092 int err;
4093
4094 rport->rqst_q = NULL;
4095
4096 if (!i->f->bsg_request)
4097 return -ENOTSUPP;
4098
4099 q = __scsi_alloc_queue(shost, fc_bsg_rport_handler);
4100 if (!q) {
4101 printk(KERN_ERR "%s: bsg interface failed to "
4102 "initialize - no request queue\n",
4103 dev->kobj.name);
4104 return -ENOMEM;
4105 }
4106
4107 q->queuedata = rport;
4108 queue_flag_set_unlocked(QUEUE_FLAG_BIDI, q);
Giridhar Malavalib5c6f772009-06-19 16:26:53 -07004109 blk_queue_softirq_done(q, fc_bsg_softirq_done);
James Smart9e4f5e22009-03-26 13:33:19 -04004110 blk_queue_rq_timed_out(q, fc_bsg_job_timeout);
4111 blk_queue_rq_timeout(q, BLK_DEFAULT_SG_TIMEOUT);
4112
4113 err = bsg_register_queue(q, dev, NULL, NULL);
4114 if (err) {
4115 printk(KERN_ERR "%s: bsg interface failed to "
4116 "initialize - register queue\n",
4117 dev->kobj.name);
4118 blk_cleanup_queue(q);
4119 return err;
4120 }
4121
4122 rport->rqst_q = q;
4123 return 0;
4124}
4125
4126
4127/**
4128 * fc_bsg_remove - Deletes the bsg hooks on fchosts/rports
4129 * @q: the request_queue that is to be torn down.
James Smart78d16342010-08-31 22:27:31 -04004130 *
4131 * Notes:
4132 * Before unregistering the queue empty any requests that are blocked
4133 *
4134 *
James Smart9e4f5e22009-03-26 13:33:19 -04004135 */
4136static void
4137fc_bsg_remove(struct request_queue *q)
4138{
4139 if (q) {
4140 bsg_unregister_queue(q);
4141 blk_cleanup_queue(q);
4142 }
4143}
4144
4145
James Smart9ef3e4a2007-05-24 19:04:44 -04004146/* Original Author: Martin Hicks */
4147MODULE_AUTHOR("James Smart");
Linus Torvalds1da177e2005-04-16 15:20:36 -07004148MODULE_DESCRIPTION("FC Transport Attributes");
4149MODULE_LICENSE("GPL");
4150
4151module_init(fc_transport_init);
4152module_exit(fc_transport_exit);