Pull delete-sigdelayed into release branch
[linux-2.6] / drivers / scsi / scsi_transport_fc.c
1 /* 
2  *  FiberChannel transport specific attributes exported to sysfs.
3  *
4  *  Copyright (c) 2003 Silicon Graphics, Inc.  All rights reserved.
5  *
6  *  This program is free software; you can redistribute it and/or modify
7  *  it under the terms of the GNU General Public License as published by
8  *  the Free Software Foundation; either version 2 of the License, or
9  *  (at your option) any later version.
10  *
11  *  This program is distributed in the hope that it will be useful,
12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  *  GNU General Public License for more details.
15  *
16  *  You should have received a copy of the GNU General Public License
17  *  along with this program; if not, write to the Free Software
18  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
19  *
20  *  ========
21  *
22  *  Copyright (C) 2004-2005   James Smart, Emulex Corporation
23  *    Rewrite for host, target, device, and remote port attributes,
24  *    statistics, and service functions...
25  *
26  */
27 #include <linux/module.h>
28 #include <linux/init.h>
29 #include <linux/sched.h>        /* workqueue stuff, HZ */
30 #include <scsi/scsi_device.h>
31 #include <scsi/scsi_host.h>
32 #include <scsi/scsi_transport.h>
33 #include <scsi/scsi_transport_fc.h>
34 #include "scsi_priv.h"
35
36 /*
37  * Redefine so that we can have same named attributes in the
38  * sdev/starget/host objects.
39  */
40 #define FC_CLASS_DEVICE_ATTR(_prefix,_name,_mode,_show,_store)          \
41 struct class_device_attribute class_device_attr_##_prefix##_##_name =   \
42         __ATTR(_name,_mode,_show,_store)
43
44 #define fc_enum_name_search(title, table_type, table)                   \
45 static const char *get_fc_##title##_name(enum table_type table_key)     \
46 {                                                                       \
47         int i;                                                          \
48         char *name = NULL;                                              \
49                                                                         \
50         for (i = 0; i < sizeof(table)/sizeof(table[0]); i++) {          \
51                 if (table[i].value == table_key) {                      \
52                         name = table[i].name;                           \
53                         break;                                          \
54                 }                                                       \
55         }                                                               \
56         return name;                                                    \
57 }
58
59 #define fc_enum_name_match(title, table_type, table)                    \
60 static int get_fc_##title##_match(const char *table_key,                \
61                 enum table_type *value)                                 \
62 {                                                                       \
63         int i;                                                          \
64                                                                         \
65         for (i = 0; i < sizeof(table)/sizeof(table[0]); i++) {          \
66                 if (strncmp(table_key, table[i].name,                   \
67                                 table[i].matchlen) == 0) {              \
68                         *value = table[i].value;                        \
69                         return 0; /* success */                         \
70                 }                                                       \
71         }                                                               \
72         return 1; /* failure */                                         \
73 }
74
75
76 /* Convert fc_port_type values to ascii string name */
77 static struct {
78         enum fc_port_type       value;
79         char                    *name;
80 } fc_port_type_names[] = {
81         { FC_PORTTYPE_UNKNOWN,          "Unknown" },
82         { FC_PORTTYPE_OTHER,            "Other" },
83         { FC_PORTTYPE_NOTPRESENT,       "Not Present" },
84         { FC_PORTTYPE_NPORT,    "NPort (fabric via point-to-point)" },
85         { FC_PORTTYPE_NLPORT,   "NLPort (fabric via loop)" },
86         { FC_PORTTYPE_LPORT,    "LPort (private loop)" },
87         { FC_PORTTYPE_PTP,      "Point-To-Point (direct nport connection" },
88 };
89 fc_enum_name_search(port_type, fc_port_type, fc_port_type_names)
90 #define FC_PORTTYPE_MAX_NAMELEN         50
91
92
93 /* Convert fc_port_state values to ascii string name */
94 static struct {
95         enum fc_port_state      value;
96         char                    *name;
97 } fc_port_state_names[] = {
98         { FC_PORTSTATE_UNKNOWN,         "Unknown" },
99         { FC_PORTSTATE_NOTPRESENT,      "Not Present" },
100         { FC_PORTSTATE_ONLINE,          "Online" },
101         { FC_PORTSTATE_OFFLINE,         "Offline" },
102         { FC_PORTSTATE_BLOCKED,         "Blocked" },
103         { FC_PORTSTATE_BYPASSED,        "Bypassed" },
104         { FC_PORTSTATE_DIAGNOSTICS,     "Diagnostics" },
105         { FC_PORTSTATE_LINKDOWN,        "Linkdown" },
106         { FC_PORTSTATE_ERROR,           "Error" },
107         { FC_PORTSTATE_LOOPBACK,        "Loopback" },
108         { FC_PORTSTATE_DELETED,         "Deleted" },
109 };
110 fc_enum_name_search(port_state, fc_port_state, fc_port_state_names)
111 #define FC_PORTSTATE_MAX_NAMELEN        20
112
113
114 /* Convert fc_tgtid_binding_type values to ascii string name */
115 static const struct {
116         enum fc_tgtid_binding_type      value;
117         char                            *name;
118         int                             matchlen;
119 } fc_tgtid_binding_type_names[] = {
120         { FC_TGTID_BIND_NONE, "none", 4 },
121         { FC_TGTID_BIND_BY_WWPN, "wwpn (World Wide Port Name)", 4 },
122         { FC_TGTID_BIND_BY_WWNN, "wwnn (World Wide Node Name)", 4 },
123         { FC_TGTID_BIND_BY_ID, "port_id (FC Address)", 7 },
124 };
125 fc_enum_name_search(tgtid_bind_type, fc_tgtid_binding_type,
126                 fc_tgtid_binding_type_names)
127 fc_enum_name_match(tgtid_bind_type, fc_tgtid_binding_type,
128                 fc_tgtid_binding_type_names)
129 #define FC_BINDTYPE_MAX_NAMELEN 30
130
131
132 #define fc_bitfield_name_search(title, table)                   \
133 static ssize_t                                                  \
134 get_fc_##title##_names(u32 table_key, char *buf)                \
135 {                                                               \
136         char *prefix = "";                                      \
137         ssize_t len = 0;                                        \
138         int i;                                                  \
139                                                                 \
140         for (i = 0; i < sizeof(table)/sizeof(table[0]); i++) {  \
141                 if (table[i].value & table_key) {               \
142                         len += sprintf(buf + len, "%s%s",       \
143                                 prefix, table[i].name);         \
144                         prefix = ", ";                          \
145                 }                                               \
146         }                                                       \
147         len += sprintf(buf + len, "\n");                        \
148         return len;                                             \
149 }
150
151
152 /* Convert FC_COS bit values to ascii string name */
153 static const struct {
154         u32                     value;
155         char                    *name;
156 } fc_cos_names[] = {
157         { FC_COS_CLASS1,        "Class 1" },
158         { FC_COS_CLASS2,        "Class 2" },
159         { FC_COS_CLASS3,        "Class 3" },
160         { FC_COS_CLASS4,        "Class 4" },
161         { FC_COS_CLASS6,        "Class 6" },
162 };
163 fc_bitfield_name_search(cos, fc_cos_names)
164
165
166 /* Convert FC_PORTSPEED bit values to ascii string name */
167 static const struct {
168         u32                     value;
169         char                    *name;
170 } fc_port_speed_names[] = {
171         { FC_PORTSPEED_1GBIT,           "1 Gbit" },
172         { FC_PORTSPEED_2GBIT,           "2 Gbit" },
173         { FC_PORTSPEED_4GBIT,           "4 Gbit" },
174         { FC_PORTSPEED_10GBIT,          "10 Gbit" },
175         { FC_PORTSPEED_NOT_NEGOTIATED,  "Not Negotiated" },
176 };
177 fc_bitfield_name_search(port_speed, fc_port_speed_names)
178
179
180 static int
181 show_fc_fc4s (char *buf, u8 *fc4_list)
182 {
183         int i, len=0;
184
185         for (i = 0; i < FC_FC4_LIST_SIZE; i++, fc4_list++)
186                 len += sprintf(buf + len , "0x%02x ", *fc4_list);
187         len += sprintf(buf + len, "\n");
188         return len;
189 }
190
191
192 /* Convert FC_RPORT_ROLE bit values to ascii string name */
193 static const struct {
194         u32                     value;
195         char                    *name;
196 } fc_remote_port_role_names[] = {
197         { FC_RPORT_ROLE_FCP_TARGET,     "FCP Target" },
198         { FC_RPORT_ROLE_FCP_INITIATOR,  "FCP Initiator" },
199         { FC_RPORT_ROLE_IP_PORT,        "IP Port" },
200 };
201 fc_bitfield_name_search(remote_port_roles, fc_remote_port_role_names)
202
203 /*
204  * Define roles that are specific to port_id. Values are relative to ROLE_MASK.
205  */
206 #define FC_WELLKNOWN_PORTID_MASK        0xfffff0
207 #define FC_WELLKNOWN_ROLE_MASK          0x00000f
208 #define FC_FPORT_PORTID                 0x00000e
209 #define FC_FABCTLR_PORTID               0x00000d
210 #define FC_DIRSRVR_PORTID               0x00000c
211 #define FC_TIMESRVR_PORTID              0x00000b
212 #define FC_MGMTSRVR_PORTID              0x00000a
213
214
215 static void fc_shost_remove_rports(void  *data);
216 static void fc_timeout_deleted_rport(void *data);
217 static void fc_scsi_scan_rport(void *data);
218 static void fc_rport_terminate(struct fc_rport  *rport);
219
220 /*
221  * Attribute counts pre object type...
222  * Increase these values if you add attributes
223  */
224 #define FC_STARGET_NUM_ATTRS    3
225 #define FC_RPORT_NUM_ATTRS      9
226 #define FC_HOST_NUM_ATTRS       17
227
228 struct fc_internal {
229         struct scsi_transport_template t;
230         struct fc_function_template *f;
231
232         /*
233          * For attributes : each object has :
234          *   An array of the actual attributes structures
235          *   An array of null-terminated pointers to the attribute
236          *     structures - used for mid-layer interaction.
237          *
238          * The attribute containers for the starget and host are are
239          * part of the midlayer. As the remote port is specific to the
240          * fc transport, we must provide the attribute container.
241          */
242         struct class_device_attribute private_starget_attrs[
243                                                         FC_STARGET_NUM_ATTRS];
244         struct class_device_attribute *starget_attrs[FC_STARGET_NUM_ATTRS + 1];
245
246         struct class_device_attribute private_host_attrs[FC_HOST_NUM_ATTRS];
247         struct class_device_attribute *host_attrs[FC_HOST_NUM_ATTRS + 1];
248
249         struct transport_container rport_attr_cont;
250         struct class_device_attribute private_rport_attrs[FC_RPORT_NUM_ATTRS];
251         struct class_device_attribute *rport_attrs[FC_RPORT_NUM_ATTRS + 1];
252 };
253
254 #define to_fc_internal(tmpl)    container_of(tmpl, struct fc_internal, t)
255
256 static int fc_target_setup(struct transport_container *tc, struct device *dev,
257                            struct class_device *cdev)
258 {
259         struct scsi_target *starget = to_scsi_target(dev);
260         struct fc_rport *rport = starget_to_rport(starget);
261
262         /*
263          * if parent is remote port, use values from remote port.
264          * Otherwise, this host uses the fc_transport, but not the
265          * remote port interface. As such, initialize to known non-values.
266          */
267         if (rport) {
268                 fc_starget_node_name(starget) = rport->node_name;
269                 fc_starget_port_name(starget) = rport->port_name;
270                 fc_starget_port_id(starget) = rport->port_id;
271         } else {
272                 fc_starget_node_name(starget) = -1;
273                 fc_starget_port_name(starget) = -1;
274                 fc_starget_port_id(starget) = -1;
275         }
276
277         return 0;
278 }
279
280 static DECLARE_TRANSPORT_CLASS(fc_transport_class,
281                                "fc_transport",
282                                fc_target_setup,
283                                NULL,
284                                NULL);
285
286 static int fc_host_setup(struct transport_container *tc, struct device *dev,
287                          struct class_device *cdev)
288 {
289         struct Scsi_Host *shost = dev_to_shost(dev);
290
291         /* 
292          * Set default values easily detected by the midlayer as
293          * failure cases.  The scsi lldd is responsible for initializing
294          * all transport attributes to valid values per host.
295          */
296         fc_host_node_name(shost) = -1;
297         fc_host_port_name(shost) = -1;
298         fc_host_permanent_port_name(shost) = -1;
299         fc_host_supported_classes(shost) = FC_COS_UNSPECIFIED;
300         memset(fc_host_supported_fc4s(shost), 0,
301                 sizeof(fc_host_supported_fc4s(shost)));
302         memset(fc_host_symbolic_name(shost), 0,
303                 sizeof(fc_host_symbolic_name(shost)));
304         fc_host_supported_speeds(shost) = FC_PORTSPEED_UNKNOWN;
305         fc_host_maxframe_size(shost) = -1;
306         memset(fc_host_serial_number(shost), 0,
307                 sizeof(fc_host_serial_number(shost)));
308
309         fc_host_port_id(shost) = -1;
310         fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
311         fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN;
312         memset(fc_host_active_fc4s(shost), 0,
313                 sizeof(fc_host_active_fc4s(shost)));
314         fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
315         fc_host_fabric_name(shost) = -1;
316
317         fc_host_tgtid_bind_type(shost) = FC_TGTID_BIND_BY_WWPN;
318
319         INIT_LIST_HEAD(&fc_host_rports(shost));
320         INIT_LIST_HEAD(&fc_host_rport_bindings(shost));
321         fc_host_next_rport_number(shost) = 0;
322         fc_host_next_target_id(shost) = 0;
323
324         fc_host_flags(shost) = 0;
325         INIT_WORK(&fc_host_rport_del_work(shost), fc_shost_remove_rports, shost);
326         return 0;
327 }
328
329 static DECLARE_TRANSPORT_CLASS(fc_host_class,
330                                "fc_host",
331                                fc_host_setup,
332                                NULL,
333                                NULL);
334
335 /*
336  * Setup and Remove actions for remote ports are handled
337  * in the service functions below.
338  */
339 static DECLARE_TRANSPORT_CLASS(fc_rport_class,
340                                "fc_remote_ports",
341                                NULL,
342                                NULL,
343                                NULL);
344
345 /*
346  * Module Parameters
347  */
348
349 /*
350  * dev_loss_tmo: the default number of seconds that the FC transport
351  *   should insulate the loss of a remote port.
352  *   The maximum will be capped by the value of SCSI_DEVICE_BLOCK_MAX_TIMEOUT.
353  */
354 static unsigned int fc_dev_loss_tmo = SCSI_DEVICE_BLOCK_MAX_TIMEOUT;
355
356 module_param_named(dev_loss_tmo, fc_dev_loss_tmo, int, S_IRUGO|S_IWUSR);
357 MODULE_PARM_DESC(dev_loss_tmo,
358                  "Maximum number of seconds that the FC transport should"
359                  " insulate the loss of a remote port. Once this value is"
360                  " exceeded, the scsi target is removed. Value should be"
361                  " between 1 and SCSI_DEVICE_BLOCK_MAX_TIMEOUT.");
362
363
364 static __init int fc_transport_init(void)
365 {
366         int error = transport_class_register(&fc_host_class);
367         if (error)
368                 return error;
369         error = transport_class_register(&fc_rport_class);
370         if (error)
371                 return error;
372         return transport_class_register(&fc_transport_class);
373 }
374
375 static void __exit fc_transport_exit(void)
376 {
377         transport_class_unregister(&fc_transport_class);
378         transport_class_unregister(&fc_rport_class);
379         transport_class_unregister(&fc_host_class);
380 }
381
382 /*
383  * FC Remote Port Attribute Management
384  */
385
386 #define fc_rport_show_function(field, format_string, sz, cast)          \
387 static ssize_t                                                          \
388 show_fc_rport_##field (struct class_device *cdev, char *buf)            \
389 {                                                                       \
390         struct fc_rport *rport = transport_class_to_rport(cdev);        \
391         struct Scsi_Host *shost = rport_to_shost(rport);                \
392         struct fc_internal *i = to_fc_internal(shost->transportt);      \
393         if ((i->f->get_rport_##field) &&                                \
394             !((rport->port_state == FC_PORTSTATE_BLOCKED) ||            \
395               (rport->port_state == FC_PORTSTATE_DELETED) ||            \
396               (rport->port_state == FC_PORTSTATE_NOTPRESENT)))          \
397                 i->f->get_rport_##field(rport);                         \
398         return snprintf(buf, sz, format_string, cast rport->field);     \
399 }
400
401 #define fc_rport_store_function(field)                                  \
402 static ssize_t                                                          \
403 store_fc_rport_##field(struct class_device *cdev, const char *buf,      \
404                            size_t count)                                \
405 {                                                                       \
406         int val;                                                        \
407         struct fc_rport *rport = transport_class_to_rport(cdev);        \
408         struct Scsi_Host *shost = rport_to_shost(rport);                \
409         struct fc_internal *i = to_fc_internal(shost->transportt);      \
410         if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||              \
411             (rport->port_state == FC_PORTSTATE_DELETED) ||              \
412             (rport->port_state == FC_PORTSTATE_NOTPRESENT))             \
413                 return -EBUSY;                                          \
414         val = simple_strtoul(buf, NULL, 0);                             \
415         i->f->set_rport_##field(rport, val);                            \
416         return count;                                                   \
417 }
418
419 #define fc_rport_rd_attr(field, format_string, sz)                      \
420         fc_rport_show_function(field, format_string, sz, )              \
421 static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO,                      \
422                          show_fc_rport_##field, NULL)
423
424 #define fc_rport_rd_attr_cast(field, format_string, sz, cast)           \
425         fc_rport_show_function(field, format_string, sz, (cast))        \
426 static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO,                      \
427                           show_fc_rport_##field, NULL)
428
429 #define fc_rport_rw_attr(field, format_string, sz)                      \
430         fc_rport_show_function(field, format_string, sz, )              \
431         fc_rport_store_function(field)                                  \
432 static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR,            \
433                         show_fc_rport_##field,                          \
434                         store_fc_rport_##field)
435
436
437 #define fc_private_rport_show_function(field, format_string, sz, cast)  \
438 static ssize_t                                                          \
439 show_fc_rport_##field (struct class_device *cdev, char *buf)            \
440 {                                                                       \
441         struct fc_rport *rport = transport_class_to_rport(cdev);        \
442         return snprintf(buf, sz, format_string, cast rport->field);     \
443 }
444
445 #define fc_private_rport_rd_attr(field, format_string, sz)              \
446         fc_private_rport_show_function(field, format_string, sz, )      \
447 static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO,                      \
448                          show_fc_rport_##field, NULL)
449
450 #define fc_private_rport_rd_attr_cast(field, format_string, sz, cast)   \
451         fc_private_rport_show_function(field, format_string, sz, (cast)) \
452 static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO,                      \
453                           show_fc_rport_##field, NULL)
454
455
456 #define fc_private_rport_rd_enum_attr(title, maxlen)                    \
457 static ssize_t                                                          \
458 show_fc_rport_##title (struct class_device *cdev, char *buf)            \
459 {                                                                       \
460         struct fc_rport *rport = transport_class_to_rport(cdev);        \
461         const char *name;                                               \
462         name = get_fc_##title##_name(rport->title);                     \
463         if (!name)                                                      \
464                 return -EINVAL;                                         \
465         return snprintf(buf, maxlen, "%s\n", name);                     \
466 }                                                                       \
467 static FC_CLASS_DEVICE_ATTR(rport, title, S_IRUGO,                      \
468                         show_fc_rport_##title, NULL)
469
470
471 #define SETUP_RPORT_ATTRIBUTE_RD(field)                                 \
472         i->private_rport_attrs[count] = class_device_attr_rport_##field; \
473         i->private_rport_attrs[count].attr.mode = S_IRUGO;              \
474         i->private_rport_attrs[count].store = NULL;                     \
475         i->rport_attrs[count] = &i->private_rport_attrs[count];         \
476         if (i->f->show_rport_##field)                                   \
477                 count++
478
479 #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field)                         \
480         i->private_rport_attrs[count] = class_device_attr_rport_##field; \
481         i->private_rport_attrs[count].attr.mode = S_IRUGO;              \
482         i->private_rport_attrs[count].store = NULL;                     \
483         i->rport_attrs[count] = &i->private_rport_attrs[count];         \
484         count++
485
486 #define SETUP_RPORT_ATTRIBUTE_RW(field)                                 \
487         i->private_rport_attrs[count] = class_device_attr_rport_##field; \
488         if (!i->f->set_rport_##field) {                                 \
489                 i->private_rport_attrs[count].attr.mode = S_IRUGO;      \
490                 i->private_rport_attrs[count].store = NULL;             \
491         }                                                               \
492         i->rport_attrs[count] = &i->private_rport_attrs[count];         \
493         if (i->f->show_rport_##field)                                   \
494                 count++
495
496
497 /* The FC Transport Remote Port Attributes: */
498
499 /* Fixed Remote Port Attributes */
500
501 fc_private_rport_rd_attr(maxframe_size, "%u bytes\n", 20);
502
503 static ssize_t
504 show_fc_rport_supported_classes (struct class_device *cdev, char *buf)
505 {
506         struct fc_rport *rport = transport_class_to_rport(cdev);
507         if (rport->supported_classes == FC_COS_UNSPECIFIED)
508                 return snprintf(buf, 20, "unspecified\n");
509         return get_fc_cos_names(rport->supported_classes, buf);
510 }
511 static FC_CLASS_DEVICE_ATTR(rport, supported_classes, S_IRUGO,
512                 show_fc_rport_supported_classes, NULL);
513
514 /* Dynamic Remote Port Attributes */
515
516 /*
517  * dev_loss_tmo attribute
518  */
519 fc_rport_show_function(dev_loss_tmo, "%d\n", 20, )
520 static ssize_t
521 store_fc_rport_dev_loss_tmo(struct class_device *cdev, const char *buf,
522                            size_t count)
523 {
524         int val;
525         struct fc_rport *rport = transport_class_to_rport(cdev);
526         struct Scsi_Host *shost = rport_to_shost(rport);
527         struct fc_internal *i = to_fc_internal(shost->transportt);
528         if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
529             (rport->port_state == FC_PORTSTATE_DELETED) ||
530             (rport->port_state == FC_PORTSTATE_NOTPRESENT))
531                 return -EBUSY;
532         val = simple_strtoul(buf, NULL, 0);
533         if ((val < 0) || (val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT))
534                 return -EINVAL;
535         i->f->set_rport_dev_loss_tmo(rport, val);
536         return count;
537 }
538 static FC_CLASS_DEVICE_ATTR(rport, dev_loss_tmo, S_IRUGO | S_IWUSR,
539                 show_fc_rport_dev_loss_tmo, store_fc_rport_dev_loss_tmo);
540
541
542 /* Private Remote Port Attributes */
543
544 fc_private_rport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
545 fc_private_rport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
546 fc_private_rport_rd_attr(port_id, "0x%06x\n", 20);
547
548 static ssize_t
549 show_fc_rport_roles (struct class_device *cdev, char *buf)
550 {
551         struct fc_rport *rport = transport_class_to_rport(cdev);
552
553         /* identify any roles that are port_id specific */
554         if ((rport->port_id != -1) &&
555             (rport->port_id & FC_WELLKNOWN_PORTID_MASK) ==
556                                         FC_WELLKNOWN_PORTID_MASK) {
557                 switch (rport->port_id & FC_WELLKNOWN_ROLE_MASK) {
558                 case FC_FPORT_PORTID:
559                         return snprintf(buf, 30, "Fabric Port\n");
560                 case FC_FABCTLR_PORTID:
561                         return snprintf(buf, 30, "Fabric Controller\n");
562                 case FC_DIRSRVR_PORTID:
563                         return snprintf(buf, 30, "Directory Server\n");
564                 case FC_TIMESRVR_PORTID:
565                         return snprintf(buf, 30, "Time Server\n");
566                 case FC_MGMTSRVR_PORTID:
567                         return snprintf(buf, 30, "Management Server\n");
568                 default:
569                         return snprintf(buf, 30, "Unknown Fabric Entity\n");
570                 }
571         } else {
572                 if (rport->roles == FC_RPORT_ROLE_UNKNOWN)
573                         return snprintf(buf, 20, "unknown\n");
574                 return get_fc_remote_port_roles_names(rport->roles, buf);
575         }
576 }
577 static FC_CLASS_DEVICE_ATTR(rport, roles, S_IRUGO,
578                 show_fc_rport_roles, NULL);
579
580 fc_private_rport_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
581 fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20);
582
583
584
585 /*
586  * FC SCSI Target Attribute Management
587  */
588
589 /*
590  * Note: in the target show function we recognize when the remote
591  *  port is in the heirarchy and do not allow the driver to get
592  *  involved in sysfs functions. The driver only gets involved if
593  *  it's the "old" style that doesn't use rports.
594  */
595 #define fc_starget_show_function(field, format_string, sz, cast)        \
596 static ssize_t                                                          \
597 show_fc_starget_##field (struct class_device *cdev, char *buf)          \
598 {                                                                       \
599         struct scsi_target *starget = transport_class_to_starget(cdev); \
600         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);    \
601         struct fc_internal *i = to_fc_internal(shost->transportt);      \
602         struct fc_rport *rport = starget_to_rport(starget);             \
603         if (rport)                                                      \
604                 fc_starget_##field(starget) = rport->field;             \
605         else if (i->f->get_starget_##field)                             \
606                 i->f->get_starget_##field(starget);                     \
607         return snprintf(buf, sz, format_string,                         \
608                 cast fc_starget_##field(starget));                      \
609 }
610
611 #define fc_starget_rd_attr(field, format_string, sz)                    \
612         fc_starget_show_function(field, format_string, sz, )            \
613 static FC_CLASS_DEVICE_ATTR(starget, field, S_IRUGO,                    \
614                          show_fc_starget_##field, NULL)
615
616 #define fc_starget_rd_attr_cast(field, format_string, sz, cast)         \
617         fc_starget_show_function(field, format_string, sz, (cast))      \
618 static FC_CLASS_DEVICE_ATTR(starget, field, S_IRUGO,                    \
619                           show_fc_starget_##field, NULL)
620
621 #define SETUP_STARGET_ATTRIBUTE_RD(field)                               \
622         i->private_starget_attrs[count] = class_device_attr_starget_##field; \
623         i->private_starget_attrs[count].attr.mode = S_IRUGO;            \
624         i->private_starget_attrs[count].store = NULL;                   \
625         i->starget_attrs[count] = &i->private_starget_attrs[count];     \
626         if (i->f->show_starget_##field)                                 \
627                 count++
628
629 #define SETUP_STARGET_ATTRIBUTE_RW(field)                               \
630         i->private_starget_attrs[count] = class_device_attr_starget_##field; \
631         if (!i->f->set_starget_##field) {                               \
632                 i->private_starget_attrs[count].attr.mode = S_IRUGO;    \
633                 i->private_starget_attrs[count].store = NULL;           \
634         }                                                               \
635         i->starget_attrs[count] = &i->private_starget_attrs[count];     \
636         if (i->f->show_starget_##field)                                 \
637                 count++
638
639 /* The FC Transport SCSI Target Attributes: */
640 fc_starget_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
641 fc_starget_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
642 fc_starget_rd_attr(port_id, "0x%06x\n", 20);
643
644
645 /*
646  * Host Attribute Management
647  */
648
649 #define fc_host_show_function(field, format_string, sz, cast)           \
650 static ssize_t                                                          \
651 show_fc_host_##field (struct class_device *cdev, char *buf)             \
652 {                                                                       \
653         struct Scsi_Host *shost = transport_class_to_shost(cdev);       \
654         struct fc_internal *i = to_fc_internal(shost->transportt);      \
655         if (i->f->get_host_##field)                                     \
656                 i->f->get_host_##field(shost);                          \
657         return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
658 }
659
660 #define fc_host_store_function(field)                                   \
661 static ssize_t                                                          \
662 store_fc_host_##field(struct class_device *cdev, const char *buf,       \
663                            size_t count)                                \
664 {                                                                       \
665         int val;                                                        \
666         struct Scsi_Host *shost = transport_class_to_shost(cdev);       \
667         struct fc_internal *i = to_fc_internal(shost->transportt);      \
668                                                                         \
669         val = simple_strtoul(buf, NULL, 0);                             \
670         i->f->set_host_##field(shost, val);                             \
671         return count;                                                   \
672 }
673
674 #define fc_host_rd_attr(field, format_string, sz)                       \
675         fc_host_show_function(field, format_string, sz, )               \
676 static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO,                       \
677                          show_fc_host_##field, NULL)
678
679 #define fc_host_rd_attr_cast(field, format_string, sz, cast)            \
680         fc_host_show_function(field, format_string, sz, (cast))         \
681 static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO,                       \
682                           show_fc_host_##field, NULL)
683
684 #define fc_host_rw_attr(field, format_string, sz)                       \
685         fc_host_show_function(field, format_string, sz, )               \
686         fc_host_store_function(field)                                   \
687 static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR,             \
688                         show_fc_host_##field,                           \
689                         store_fc_host_##field)
690
691 #define fc_host_rd_enum_attr(title, maxlen)                             \
692 static ssize_t                                                          \
693 show_fc_host_##title (struct class_device *cdev, char *buf)             \
694 {                                                                       \
695         struct Scsi_Host *shost = transport_class_to_shost(cdev);       \
696         struct fc_internal *i = to_fc_internal(shost->transportt);      \
697         const char *name;                                               \
698         if (i->f->get_host_##title)                                     \
699                 i->f->get_host_##title(shost);                          \
700         name = get_fc_##title##_name(fc_host_##title(shost));           \
701         if (!name)                                                      \
702                 return -EINVAL;                                         \
703         return snprintf(buf, maxlen, "%s\n", name);                     \
704 }                                                                       \
705 static FC_CLASS_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL)
706
707 #define SETUP_HOST_ATTRIBUTE_RD(field)                                  \
708         i->private_host_attrs[count] = class_device_attr_host_##field;  \
709         i->private_host_attrs[count].attr.mode = S_IRUGO;               \
710         i->private_host_attrs[count].store = NULL;                      \
711         i->host_attrs[count] = &i->private_host_attrs[count];           \
712         if (i->f->show_host_##field)                                    \
713                 count++
714
715 #define SETUP_HOST_ATTRIBUTE_RW(field)                                  \
716         i->private_host_attrs[count] = class_device_attr_host_##field;  \
717         if (!i->f->set_host_##field) {                                  \
718                 i->private_host_attrs[count].attr.mode = S_IRUGO;       \
719                 i->private_host_attrs[count].store = NULL;              \
720         }                                                               \
721         i->host_attrs[count] = &i->private_host_attrs[count];           \
722         if (i->f->show_host_##field)                                    \
723                 count++
724
725
726 #define fc_private_host_show_function(field, format_string, sz, cast)   \
727 static ssize_t                                                          \
728 show_fc_host_##field (struct class_device *cdev, char *buf)             \
729 {                                                                       \
730         struct Scsi_Host *shost = transport_class_to_shost(cdev);       \
731         return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
732 }
733
734 #define fc_private_host_rd_attr(field, format_string, sz)               \
735         fc_private_host_show_function(field, format_string, sz, )       \
736 static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO,                       \
737                          show_fc_host_##field, NULL)
738
739 #define fc_private_host_rd_attr_cast(field, format_string, sz, cast)    \
740         fc_private_host_show_function(field, format_string, sz, (cast)) \
741 static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO,                       \
742                           show_fc_host_##field, NULL)
743
744 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field)                  \
745         i->private_host_attrs[count] = class_device_attr_host_##field;  \
746         i->private_host_attrs[count].attr.mode = S_IRUGO;               \
747         i->private_host_attrs[count].store = NULL;                      \
748         i->host_attrs[count] = &i->private_host_attrs[count];           \
749         count++
750
751 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field)                  \
752 {                                                                       \
753         i->private_host_attrs[count] = class_device_attr_host_##field;  \
754         i->host_attrs[count] = &i->private_host_attrs[count];           \
755         count++;                                                        \
756 }
757
758
759 /* Fixed Host Attributes */
760
761 static ssize_t
762 show_fc_host_supported_classes (struct class_device *cdev, char *buf)
763 {
764         struct Scsi_Host *shost = transport_class_to_shost(cdev);
765
766         if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED)
767                 return snprintf(buf, 20, "unspecified\n");
768
769         return get_fc_cos_names(fc_host_supported_classes(shost), buf);
770 }
771 static FC_CLASS_DEVICE_ATTR(host, supported_classes, S_IRUGO,
772                 show_fc_host_supported_classes, NULL);
773
774 static ssize_t
775 show_fc_host_supported_fc4s (struct class_device *cdev, char *buf)
776 {
777         struct Scsi_Host *shost = transport_class_to_shost(cdev);
778         return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost));
779 }
780 static FC_CLASS_DEVICE_ATTR(host, supported_fc4s, S_IRUGO,
781                 show_fc_host_supported_fc4s, NULL);
782
783 static ssize_t
784 show_fc_host_supported_speeds (struct class_device *cdev, char *buf)
785 {
786         struct Scsi_Host *shost = transport_class_to_shost(cdev);
787
788         if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN)
789                 return snprintf(buf, 20, "unknown\n");
790
791         return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf);
792 }
793 static FC_CLASS_DEVICE_ATTR(host, supported_speeds, S_IRUGO,
794                 show_fc_host_supported_speeds, NULL);
795
796
797 fc_private_host_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
798 fc_private_host_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
799 fc_private_host_rd_attr_cast(permanent_port_name, "0x%llx\n", 20,
800                              unsigned long long);
801 fc_private_host_rd_attr(symbolic_name, "%s\n", (FC_SYMBOLIC_NAME_SIZE +1));
802 fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20);
803 fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1));
804
805
806 /* Dynamic Host Attributes */
807
808 static ssize_t
809 show_fc_host_active_fc4s (struct class_device *cdev, char *buf)
810 {
811         struct Scsi_Host *shost = transport_class_to_shost(cdev);
812         struct fc_internal *i = to_fc_internal(shost->transportt);
813
814         if (i->f->get_host_active_fc4s)
815                 i->f->get_host_active_fc4s(shost);
816
817         return (ssize_t)show_fc_fc4s(buf, fc_host_active_fc4s(shost));
818 }
819 static FC_CLASS_DEVICE_ATTR(host, active_fc4s, S_IRUGO,
820                 show_fc_host_active_fc4s, NULL);
821
822 static ssize_t
823 show_fc_host_speed (struct class_device *cdev, char *buf)
824 {
825         struct Scsi_Host *shost = transport_class_to_shost(cdev);
826         struct fc_internal *i = to_fc_internal(shost->transportt);
827
828         if (i->f->get_host_speed)
829                 i->f->get_host_speed(shost);
830
831         if (fc_host_speed(shost) == FC_PORTSPEED_UNKNOWN)
832                 return snprintf(buf, 20, "unknown\n");
833
834         return get_fc_port_speed_names(fc_host_speed(shost), buf);
835 }
836 static FC_CLASS_DEVICE_ATTR(host, speed, S_IRUGO,
837                 show_fc_host_speed, NULL);
838
839
840 fc_host_rd_attr(port_id, "0x%06x\n", 20);
841 fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN);
842 fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
843 fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long);
844
845
846 /* Private Host Attributes */
847
848 static ssize_t
849 show_fc_private_host_tgtid_bind_type(struct class_device *cdev, char *buf)
850 {
851         struct Scsi_Host *shost = transport_class_to_shost(cdev);
852         const char *name;
853
854         name = get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost));
855         if (!name)
856                 return -EINVAL;
857         return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name);
858 }
859
860 #define get_list_head_entry(pos, head, member)          \
861         pos = list_entry((head)->next, typeof(*pos), member)
862
863 static ssize_t
864 store_fc_private_host_tgtid_bind_type(struct class_device *cdev,
865         const char *buf, size_t count)
866 {
867         struct Scsi_Host *shost = transport_class_to_shost(cdev);
868         struct fc_rport *rport;
869         enum fc_tgtid_binding_type val;
870         unsigned long flags;
871
872         if (get_fc_tgtid_bind_type_match(buf, &val))
873                 return -EINVAL;
874
875         /* if changing bind type, purge all unused consistent bindings */
876         if (val != fc_host_tgtid_bind_type(shost)) {
877                 spin_lock_irqsave(shost->host_lock, flags);
878                 while (!list_empty(&fc_host_rport_bindings(shost))) {
879                         get_list_head_entry(rport,
880                                 &fc_host_rport_bindings(shost), peers);
881                         spin_unlock_irqrestore(shost->host_lock, flags);
882                         fc_rport_terminate(rport);
883                         spin_lock_irqsave(shost->host_lock, flags);
884                 }
885                 spin_unlock_irqrestore(shost->host_lock, flags);
886         }
887
888         fc_host_tgtid_bind_type(shost) = val;
889         return count;
890 }
891
892 static FC_CLASS_DEVICE_ATTR(host, tgtid_bind_type, S_IRUGO | S_IWUSR,
893                         show_fc_private_host_tgtid_bind_type,
894                         store_fc_private_host_tgtid_bind_type);
895
896 static ssize_t
897 store_fc_private_host_issue_lip(struct class_device *cdev,
898         const char *buf, size_t count)
899 {
900         struct Scsi_Host *shost = transport_class_to_shost(cdev);
901         struct fc_internal *i = to_fc_internal(shost->transportt);
902         int ret;
903
904         /* ignore any data value written to the attribute */
905         if (i->f->issue_fc_host_lip) {
906                 ret = i->f->issue_fc_host_lip(shost);
907                 return ret ? ret: count;
908         }
909
910         return -ENOENT;
911 }
912
913 static FC_CLASS_DEVICE_ATTR(host, issue_lip, S_IWUSR, NULL,
914                         store_fc_private_host_issue_lip);
915
916 /*
917  * Host Statistics Management
918  */
919
920 /* Show a given an attribute in the statistics group */
921 static ssize_t
922 fc_stat_show(const struct class_device *cdev, char *buf, unsigned long offset)
923 {
924         struct Scsi_Host *shost = transport_class_to_shost(cdev);
925         struct fc_internal *i = to_fc_internal(shost->transportt);
926         struct fc_host_statistics *stats;
927         ssize_t ret = -ENOENT;
928
929         if (offset > sizeof(struct fc_host_statistics) ||
930             offset % sizeof(u64) != 0)
931                 WARN_ON(1);
932
933         if (i->f->get_fc_host_stats) {
934                 stats = (i->f->get_fc_host_stats)(shost);
935                 if (stats)
936                         ret = snprintf(buf, 20, "0x%llx\n",
937                               (unsigned long long)*(u64 *)(((u8 *) stats) + offset));
938         }
939         return ret;
940 }
941
942
943 /* generate a read-only statistics attribute */
944 #define fc_host_statistic(name)                                         \
945 static ssize_t show_fcstat_##name(struct class_device *cd, char *buf)   \
946 {                                                                       \
947         return fc_stat_show(cd, buf,                                    \
948                             offsetof(struct fc_host_statistics, name)); \
949 }                                                                       \
950 static FC_CLASS_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL)
951
952 fc_host_statistic(seconds_since_last_reset);
953 fc_host_statistic(tx_frames);
954 fc_host_statistic(tx_words);
955 fc_host_statistic(rx_frames);
956 fc_host_statistic(rx_words);
957 fc_host_statistic(lip_count);
958 fc_host_statistic(nos_count);
959 fc_host_statistic(error_frames);
960 fc_host_statistic(dumped_frames);
961 fc_host_statistic(link_failure_count);
962 fc_host_statistic(loss_of_sync_count);
963 fc_host_statistic(loss_of_signal_count);
964 fc_host_statistic(prim_seq_protocol_err_count);
965 fc_host_statistic(invalid_tx_word_count);
966 fc_host_statistic(invalid_crc_count);
967 fc_host_statistic(fcp_input_requests);
968 fc_host_statistic(fcp_output_requests);
969 fc_host_statistic(fcp_control_requests);
970 fc_host_statistic(fcp_input_megabytes);
971 fc_host_statistic(fcp_output_megabytes);
972
973 static ssize_t
974 fc_reset_statistics(struct class_device *cdev, const char *buf,
975                            size_t count)
976 {
977         struct Scsi_Host *shost = transport_class_to_shost(cdev);
978         struct fc_internal *i = to_fc_internal(shost->transportt);
979
980         /* ignore any data value written to the attribute */
981         if (i->f->reset_fc_host_stats) {
982                 i->f->reset_fc_host_stats(shost);
983                 return count;
984         }
985
986         return -ENOENT;
987 }
988 static FC_CLASS_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL,
989                                 fc_reset_statistics);
990
991
992 static struct attribute *fc_statistics_attrs[] = {
993         &class_device_attr_host_seconds_since_last_reset.attr,
994         &class_device_attr_host_tx_frames.attr,
995         &class_device_attr_host_tx_words.attr,
996         &class_device_attr_host_rx_frames.attr,
997         &class_device_attr_host_rx_words.attr,
998         &class_device_attr_host_lip_count.attr,
999         &class_device_attr_host_nos_count.attr,
1000         &class_device_attr_host_error_frames.attr,
1001         &class_device_attr_host_dumped_frames.attr,
1002         &class_device_attr_host_link_failure_count.attr,
1003         &class_device_attr_host_loss_of_sync_count.attr,
1004         &class_device_attr_host_loss_of_signal_count.attr,
1005         &class_device_attr_host_prim_seq_protocol_err_count.attr,
1006         &class_device_attr_host_invalid_tx_word_count.attr,
1007         &class_device_attr_host_invalid_crc_count.attr,
1008         &class_device_attr_host_fcp_input_requests.attr,
1009         &class_device_attr_host_fcp_output_requests.attr,
1010         &class_device_attr_host_fcp_control_requests.attr,
1011         &class_device_attr_host_fcp_input_megabytes.attr,
1012         &class_device_attr_host_fcp_output_megabytes.attr,
1013         &class_device_attr_host_reset_statistics.attr,
1014         NULL
1015 };
1016
1017 static struct attribute_group fc_statistics_group = {
1018         .name = "statistics",
1019         .attrs = fc_statistics_attrs,
1020 };
1021
1022 static int fc_host_match(struct attribute_container *cont,
1023                           struct device *dev)
1024 {
1025         struct Scsi_Host *shost;
1026         struct fc_internal *i;
1027
1028         if (!scsi_is_host_device(dev))
1029                 return 0;
1030
1031         shost = dev_to_shost(dev);
1032         if (!shost->transportt  || shost->transportt->host_attrs.ac.class
1033             != &fc_host_class.class)
1034                 return 0;
1035
1036         i = to_fc_internal(shost->transportt);
1037
1038         return &i->t.host_attrs.ac == cont;
1039 }
1040
1041 static int fc_target_match(struct attribute_container *cont,
1042                             struct device *dev)
1043 {
1044         struct Scsi_Host *shost;
1045         struct fc_internal *i;
1046
1047         if (!scsi_is_target_device(dev))
1048                 return 0;
1049
1050         shost = dev_to_shost(dev->parent);
1051         if (!shost->transportt  || shost->transportt->host_attrs.ac.class
1052             != &fc_host_class.class)
1053                 return 0;
1054
1055         i = to_fc_internal(shost->transportt);
1056
1057         return &i->t.target_attrs.ac == cont;
1058 }
1059
1060 static void fc_rport_dev_release(struct device *dev)
1061 {
1062         struct fc_rport *rport = dev_to_rport(dev);
1063         put_device(dev->parent);
1064         kfree(rport);
1065 }
1066
1067 int scsi_is_fc_rport(const struct device *dev)
1068 {
1069         return dev->release == fc_rport_dev_release;
1070 }
1071 EXPORT_SYMBOL(scsi_is_fc_rport);
1072
1073 static int fc_rport_match(struct attribute_container *cont,
1074                             struct device *dev)
1075 {
1076         struct Scsi_Host *shost;
1077         struct fc_internal *i;
1078
1079         if (!scsi_is_fc_rport(dev))
1080                 return 0;
1081
1082         shost = dev_to_shost(dev->parent);
1083         if (!shost->transportt  || shost->transportt->host_attrs.ac.class
1084             != &fc_host_class.class)
1085                 return 0;
1086
1087         i = to_fc_internal(shost->transportt);
1088
1089         return &i->rport_attr_cont.ac == cont;
1090 }
1091
1092
1093 /*
1094  * Must be called with shost->host_lock held
1095  */
1096 static int fc_user_scan(struct Scsi_Host *shost, uint channel,
1097                 uint id, uint lun)
1098 {
1099         struct fc_rport *rport;
1100
1101         list_for_each_entry(rport, &fc_host_rports(shost), peers) {
1102                 if (rport->scsi_target_id == -1)
1103                         continue;
1104
1105                 if ((channel == SCAN_WILD_CARD || channel == rport->channel) &&
1106                     (id == SCAN_WILD_CARD || id == rport->scsi_target_id)) {
1107                         scsi_scan_target(&rport->dev, rport->channel,
1108                                          rport->scsi_target_id, lun, 1);
1109                 }
1110         }
1111
1112         return 0;
1113 }
1114
1115 struct scsi_transport_template *
1116 fc_attach_transport(struct fc_function_template *ft)
1117 {
1118         struct fc_internal *i = kmalloc(sizeof(struct fc_internal),
1119                                         GFP_KERNEL);
1120         int count;
1121
1122         if (unlikely(!i))
1123                 return NULL;
1124
1125         memset(i, 0, sizeof(struct fc_internal));
1126
1127         i->t.target_attrs.ac.attrs = &i->starget_attrs[0];
1128         i->t.target_attrs.ac.class = &fc_transport_class.class;
1129         i->t.target_attrs.ac.match = fc_target_match;
1130         i->t.target_size = sizeof(struct fc_starget_attrs);
1131         transport_container_register(&i->t.target_attrs);
1132
1133         i->t.host_attrs.ac.attrs = &i->host_attrs[0];
1134         i->t.host_attrs.ac.class = &fc_host_class.class;
1135         i->t.host_attrs.ac.match = fc_host_match;
1136         i->t.host_size = sizeof(struct fc_host_attrs);
1137         if (ft->get_fc_host_stats)
1138                 i->t.host_attrs.statistics = &fc_statistics_group;
1139         transport_container_register(&i->t.host_attrs);
1140
1141         i->rport_attr_cont.ac.attrs = &i->rport_attrs[0];
1142         i->rport_attr_cont.ac.class = &fc_rport_class.class;
1143         i->rport_attr_cont.ac.match = fc_rport_match;
1144         transport_container_register(&i->rport_attr_cont);
1145
1146         i->f = ft;
1147
1148         /* Transport uses the shost workq for scsi scanning */
1149         i->t.create_work_queue = 1;
1150
1151         i->t.user_scan = fc_user_scan;
1152         
1153         /*
1154          * Setup SCSI Target Attributes.
1155          */
1156         count = 0;
1157         SETUP_STARGET_ATTRIBUTE_RD(node_name);
1158         SETUP_STARGET_ATTRIBUTE_RD(port_name);
1159         SETUP_STARGET_ATTRIBUTE_RD(port_id);
1160
1161         BUG_ON(count > FC_STARGET_NUM_ATTRS);
1162
1163         i->starget_attrs[count] = NULL;
1164
1165
1166         /*
1167          * Setup SCSI Host Attributes.
1168          */
1169         count=0;
1170         SETUP_HOST_ATTRIBUTE_RD(node_name);
1171         SETUP_HOST_ATTRIBUTE_RD(port_name);
1172         SETUP_HOST_ATTRIBUTE_RD(permanent_port_name);
1173         SETUP_HOST_ATTRIBUTE_RD(supported_classes);
1174         SETUP_HOST_ATTRIBUTE_RD(supported_fc4s);
1175         SETUP_HOST_ATTRIBUTE_RD(symbolic_name);
1176         SETUP_HOST_ATTRIBUTE_RD(supported_speeds);
1177         SETUP_HOST_ATTRIBUTE_RD(maxframe_size);
1178         SETUP_HOST_ATTRIBUTE_RD(serial_number);
1179
1180         SETUP_HOST_ATTRIBUTE_RD(port_id);
1181         SETUP_HOST_ATTRIBUTE_RD(port_type);
1182         SETUP_HOST_ATTRIBUTE_RD(port_state);
1183         SETUP_HOST_ATTRIBUTE_RD(active_fc4s);
1184         SETUP_HOST_ATTRIBUTE_RD(speed);
1185         SETUP_HOST_ATTRIBUTE_RD(fabric_name);
1186
1187         /* Transport-managed attributes */
1188         SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type);
1189         if (ft->issue_fc_host_lip)
1190                 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip);
1191
1192         BUG_ON(count > FC_HOST_NUM_ATTRS);
1193
1194         i->host_attrs[count] = NULL;
1195
1196         /*
1197          * Setup Remote Port Attributes.
1198          */
1199         count=0;
1200         SETUP_RPORT_ATTRIBUTE_RD(maxframe_size);
1201         SETUP_RPORT_ATTRIBUTE_RD(supported_classes);
1202         SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo);
1203         SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name);
1204         SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name);
1205         SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id);
1206         SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles);
1207         SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_state);
1208         SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id);
1209
1210         BUG_ON(count > FC_RPORT_NUM_ATTRS);
1211
1212         i->rport_attrs[count] = NULL;
1213
1214         return &i->t;
1215 }
1216 EXPORT_SYMBOL(fc_attach_transport);
1217
1218 void fc_release_transport(struct scsi_transport_template *t)
1219 {
1220         struct fc_internal *i = to_fc_internal(t);
1221
1222         transport_container_unregister(&i->t.target_attrs);
1223         transport_container_unregister(&i->t.host_attrs);
1224         transport_container_unregister(&i->rport_attr_cont);
1225
1226         kfree(i);
1227 }
1228 EXPORT_SYMBOL(fc_release_transport);
1229
1230
1231 /**
1232  * fc_remove_host - called to terminate any fc_transport-related elements
1233  *                  for a scsi host.
1234  * @rport:      remote port to be unblocked.
1235  *
1236  * This routine is expected to be called immediately preceeding the
1237  * a driver's call to scsi_remove_host().
1238  *
1239  * WARNING: A driver utilizing the fc_transport, which fails to call
1240  *   this routine prior to scsi_remote_host(), will leave dangling
1241  *   objects in /sys/class/fc_remote_ports. Access to any of these
1242  *   objects can result in a system crash !!!
1243  *
1244  * Notes:
1245  *      This routine assumes no locks are held on entry.
1246  **/
1247 void
1248 fc_remove_host(struct Scsi_Host *shost)
1249 {
1250         struct fc_rport *rport, *next_rport;
1251
1252         /* Remove any remote ports */
1253         list_for_each_entry_safe(rport, next_rport,
1254                         &fc_host_rports(shost), peers)
1255                 fc_rport_terminate(rport);
1256         list_for_each_entry_safe(rport, next_rport,
1257                         &fc_host_rport_bindings(shost), peers)
1258                 fc_rport_terminate(rport);
1259 }
1260 EXPORT_SYMBOL(fc_remove_host);
1261
1262 /*
1263  * fc_rport_tgt_remove - Removes the scsi target on the remote port
1264  * @rport:      The remote port to be operated on
1265  */
1266 static void
1267 fc_rport_tgt_remove(struct fc_rport *rport)
1268 {
1269         struct Scsi_Host *shost = rport_to_shost(rport);
1270
1271         scsi_target_unblock(&rport->dev);
1272
1273         /* Stop anything on the workq */
1274         if (!cancel_delayed_work(&rport->dev_loss_work))
1275                 flush_scheduled_work();
1276         scsi_flush_work(shost);
1277
1278         scsi_remove_target(&rport->dev);
1279 }
1280
1281 /**
1282  * fc_rport_create - allocates and creates a remote FC port.
1283  * @shost:      scsi host the remote port is connected to.
1284  * @channel:    Channel on shost port connected to.
1285  * @ids:        The world wide names, fc address, and FC4 port
1286  *              roles for the remote port.
1287  *
1288  * Allocates and creates the remoter port structure, including the
1289  * class and sysfs creation.
1290  *
1291  * Notes:
1292  *      This routine assumes no locks are held on entry.
1293  **/
1294 struct fc_rport *
1295 fc_rport_create(struct Scsi_Host *shost, int channel,
1296         struct fc_rport_identifiers  *ids)
1297 {
1298         struct fc_host_attrs *fc_host =
1299                         (struct fc_host_attrs *)shost->shost_data;
1300         struct fc_internal *fci = to_fc_internal(shost->transportt);
1301         struct fc_rport *rport;
1302         struct device *dev;
1303         unsigned long flags;
1304         int error;
1305         size_t size;
1306
1307         size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size);
1308         rport = kmalloc(size, GFP_KERNEL);
1309         if (unlikely(!rport)) {
1310                 printk(KERN_ERR "%s: allocation failure\n", __FUNCTION__);
1311                 return NULL;
1312         }
1313         memset(rport, 0, size);
1314
1315         rport->maxframe_size = -1;
1316         rport->supported_classes = FC_COS_UNSPECIFIED;
1317         rport->dev_loss_tmo = fc_dev_loss_tmo;
1318         memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name));
1319         memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name));
1320         rport->port_id = ids->port_id;
1321         rport->roles = ids->roles;
1322         rport->port_state = FC_PORTSTATE_ONLINE;
1323         if (fci->f->dd_fcrport_size)
1324                 rport->dd_data = &rport[1];
1325         rport->channel = channel;
1326
1327         INIT_WORK(&rport->dev_loss_work, fc_timeout_deleted_rport, rport);
1328         INIT_WORK(&rport->scan_work, fc_scsi_scan_rport, rport);
1329
1330         spin_lock_irqsave(shost->host_lock, flags);
1331
1332         rport->number = fc_host->next_rport_number++;
1333         if (rport->roles & FC_RPORT_ROLE_FCP_TARGET)
1334                 rport->scsi_target_id = fc_host->next_target_id++;
1335         else
1336                 rport->scsi_target_id = -1;
1337         list_add_tail(&rport->peers, &fc_host_rports(shost));
1338         get_device(&shost->shost_gendev);
1339
1340         spin_unlock_irqrestore(shost->host_lock, flags);
1341
1342         dev = &rport->dev;
1343         device_initialize(dev);
1344         dev->parent = get_device(&shost->shost_gendev);
1345         dev->release = fc_rport_dev_release;
1346         sprintf(dev->bus_id, "rport-%d:%d-%d",
1347                 shost->host_no, channel, rport->number);
1348         transport_setup_device(dev);
1349
1350         error = device_add(dev);
1351         if (error) {
1352                 printk(KERN_ERR "FC Remote Port device_add failed\n");
1353                 goto delete_rport;
1354         }
1355         transport_add_device(dev);
1356         transport_configure_device(dev);
1357
1358         if (rport->roles & FC_RPORT_ROLE_FCP_TARGET)
1359                 /* initiate a scan of the target */
1360                 scsi_queue_work(shost, &rport->scan_work);
1361
1362         return rport;
1363
1364 delete_rport:
1365         transport_destroy_device(dev);
1366         put_device(dev->parent);
1367         spin_lock_irqsave(shost->host_lock, flags);
1368         list_del(&rport->peers);
1369         put_device(&shost->shost_gendev);
1370         spin_unlock_irqrestore(shost->host_lock, flags);
1371         put_device(dev->parent);
1372         kfree(rport);
1373         return NULL;
1374 }
1375
1376 /**
1377  * fc_remote_port_add - notifies the fc transport of the existence
1378  *              of a remote FC port.
1379  * @shost:      scsi host the remote port is connected to.
1380  * @channel:    Channel on shost port connected to.
1381  * @ids:        The world wide names, fc address, and FC4 port
1382  *              roles for the remote port.
1383  *
1384  * The LLDD calls this routine to notify the transport of the existence
1385  * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn)
1386  * of the port, it's FC address (port_id), and the FC4 roles that are
1387  * active for the port.
1388  *
1389  * For ports that are FCP targets (aka scsi targets), the FC transport
1390  * maintains consistent target id bindings on behalf of the LLDD.
1391  * A consistent target id binding is an assignment of a target id to
1392  * a remote port identifier, which persists while the scsi host is
1393  * attached. The remote port can disappear, then later reappear, and
1394  * it's target id assignment remains the same. This allows for shifts
1395  * in FC addressing (if binding by wwpn or wwnn) with no apparent
1396  * changes to the scsi subsystem which is based on scsi host number and
1397  * target id values.  Bindings are only valid during the attachment of
1398  * the scsi host. If the host detaches, then later re-attaches, target
1399  * id bindings may change.
1400  *
1401  * This routine is responsible for returning a remote port structure.
1402  * The routine will search the list of remote ports it maintains
1403  * internally on behalf of consistent target id mappings. If found, the
1404  * remote port structure will be reused. Otherwise, a new remote port
1405  * structure will be allocated.
1406  *
1407  * Whenever a remote port is allocated, a new fc_remote_port class
1408  * device is created.
1409  *
1410  * Should not be called from interrupt context.
1411  *
1412  * Notes:
1413  *      This routine assumes no locks are held on entry.
1414  **/
1415 struct fc_rport *
1416 fc_remote_port_add(struct Scsi_Host *shost, int channel,
1417         struct fc_rport_identifiers  *ids)
1418 {
1419         struct fc_internal *fci = to_fc_internal(shost->transportt);
1420         struct fc_rport *rport;
1421         unsigned long flags;
1422         int match = 0;
1423
1424         /*
1425          * Search the list of "active" rports, for an rport that has been
1426          * deleted, but we've held off the real delete while the target
1427          * is in a "blocked" state.
1428          */
1429         spin_lock_irqsave(shost->host_lock, flags);
1430
1431         list_for_each_entry(rport, &fc_host_rports(shost), peers) {
1432
1433                 if ((rport->port_state == FC_PORTSTATE_BLOCKED) &&
1434                         (rport->channel == channel)) {
1435
1436                         switch (fc_host_tgtid_bind_type(shost)) {
1437                         case FC_TGTID_BIND_BY_WWPN:
1438                         case FC_TGTID_BIND_NONE:
1439                                 if (rport->port_name == ids->port_name)
1440                                         match = 1;
1441                                 break;
1442                         case FC_TGTID_BIND_BY_WWNN:
1443                                 if (rport->node_name == ids->node_name)
1444                                         match = 1;
1445                                 break;
1446                         case FC_TGTID_BIND_BY_ID:
1447                                 if (rport->port_id == ids->port_id)
1448                                         match = 1;
1449                                 break;
1450                         }
1451
1452                         if (match) {
1453                                 struct work_struct *work = 
1454                                                         &rport->dev_loss_work;
1455
1456                                 memcpy(&rport->node_name, &ids->node_name,
1457                                         sizeof(rport->node_name));
1458                                 memcpy(&rport->port_name, &ids->port_name,
1459                                         sizeof(rport->port_name));
1460                                 rport->port_id = ids->port_id;
1461
1462                                 rport->port_state = FC_PORTSTATE_ONLINE;
1463                                 rport->roles = ids->roles;
1464
1465                                 spin_unlock_irqrestore(shost->host_lock, flags);
1466
1467                                 if (fci->f->dd_fcrport_size)
1468                                         memset(rport->dd_data, 0,
1469                                                 fci->f->dd_fcrport_size);
1470
1471                                 /*
1472                                  * If we were blocked, we were a target.
1473                                  * If no longer a target, we leave the timer
1474                                  * running in case the port changes roles
1475                                  * prior to the timer expiring. If the timer
1476                                  * fires, the target will be torn down.
1477                                  */
1478                                 if (!(ids->roles & FC_RPORT_ROLE_FCP_TARGET))
1479                                         return rport;
1480
1481                                 /* restart the target */
1482
1483                                 /*
1484                                  * Stop the target timer first. Take no action
1485                                  * on the del_timer failure as the state
1486                                  * machine state change will validate the
1487                                  * transaction.
1488                                  */
1489                                 if (!cancel_delayed_work(work))
1490                                         flush_scheduled_work();
1491
1492                                 /* initiate a scan of the target */
1493                                 scsi_queue_work(shost, &rport->scan_work);
1494
1495                                 return rport;
1496                         }
1497                 }
1498         }
1499
1500         /* Search the bindings array */
1501         if (fc_host_tgtid_bind_type(shost) != FC_TGTID_BIND_NONE) {
1502
1503                 /* search for a matching consistent binding */
1504
1505                 list_for_each_entry(rport, &fc_host_rport_bindings(shost),
1506                                         peers) {
1507                         if (rport->channel != channel)
1508                                 continue;
1509
1510                         switch (fc_host_tgtid_bind_type(shost)) {
1511                         case FC_TGTID_BIND_BY_WWPN:
1512                                 if (rport->port_name == ids->port_name)
1513                                         match = 1;
1514                                 break;
1515                         case FC_TGTID_BIND_BY_WWNN:
1516                                 if (rport->node_name == ids->node_name)
1517                                         match = 1;
1518                                 break;
1519                         case FC_TGTID_BIND_BY_ID:
1520                                 if (rport->port_id == ids->port_id)
1521                                         match = 1;
1522                                 break;
1523                         case FC_TGTID_BIND_NONE: /* to keep compiler happy */
1524                                 break;
1525                         }
1526
1527                         if (match) {
1528                                 list_move_tail(&rport->peers,
1529                                         &fc_host_rports(shost));
1530                                 break;
1531                         }
1532                 }
1533
1534                 if (match) {
1535                         memcpy(&rport->node_name, &ids->node_name,
1536                                 sizeof(rport->node_name));
1537                         memcpy(&rport->port_name, &ids->port_name,
1538                                 sizeof(rport->port_name));
1539                         rport->port_id = ids->port_id;
1540                         rport->roles = ids->roles;
1541                         rport->port_state = FC_PORTSTATE_ONLINE;
1542
1543                         spin_unlock_irqrestore(shost->host_lock, flags);
1544
1545                         if (fci->f->dd_fcrport_size)
1546                                 memset(rport->dd_data, 0,
1547                                                 fci->f->dd_fcrport_size);
1548
1549                         if (rport->roles & FC_RPORT_ROLE_FCP_TARGET)
1550                                 /* initiate a scan of the target */
1551                                 scsi_queue_work(shost, &rport->scan_work);
1552
1553                         return rport;
1554                 }
1555         }
1556
1557         spin_unlock_irqrestore(shost->host_lock, flags);
1558
1559         /* No consistent binding found - create new remote port entry */
1560         rport = fc_rport_create(shost, channel, ids);
1561
1562         return rport;
1563 }
1564 EXPORT_SYMBOL(fc_remote_port_add);
1565
1566 /*
1567  * fc_rport_terminate - this routine tears down and deallocates a remote port.
1568  * @rport:      The remote port to be terminated
1569  *
1570  * Notes:
1571  *      This routine assumes no locks are held on entry.
1572  */
1573 static void
1574 fc_rport_terminate(struct fc_rport  *rport)
1575 {
1576         struct Scsi_Host *shost = rport_to_shost(rport);
1577         struct device *dev = &rport->dev;
1578         unsigned long flags;
1579
1580         fc_rport_tgt_remove(rport);
1581
1582         transport_remove_device(dev);
1583         device_del(dev);
1584         transport_destroy_device(dev);
1585         spin_lock_irqsave(shost->host_lock, flags);
1586         list_del(&rport->peers);
1587         spin_unlock_irqrestore(shost->host_lock, flags);
1588         put_device(&shost->shost_gendev);
1589 }
1590
1591 /**
1592  * fc_remote_port_delete - notifies the fc transport that a remote
1593  *              port is no longer in existence.
1594  * @rport:      The remote port that no longer exists
1595  *
1596  * The LLDD calls this routine to notify the transport that a remote
1597  * port is no longer part of the topology. Note: Although a port
1598  * may no longer be part of the topology, it may persist in the remote
1599  * ports displayed by the fc_host. We do this under 2 conditions:
1600  * - If the port was a scsi target, we delay its deletion by "blocking" it.
1601  *   This allows the port to temporarily disappear, then reappear without
1602  *   disrupting the SCSI device tree attached to it. During the "blocked"
1603  *   period the port will still exist.
1604  * - If the port was a scsi target and disappears for longer than we
1605  *   expect, we'll delete the port and the tear down the SCSI device tree
1606  *   attached to it. However, we want to semi-persist the target id assigned
1607  *   to that port if it eventually does exist. The port structure will
1608  *   remain (although with minimal information) so that the target id
1609  *   bindings remails.
1610  *
1611  * If the remote port is not an FCP Target, it will be fully torn down
1612  * and deallocated, including the fc_remote_port class device.
1613  *
1614  * If the remote port is an FCP Target, the port will be placed in a
1615  * temporary blocked state. From the LLDD's perspective, the rport no
1616  * longer exists. From the SCSI midlayer's perspective, the SCSI target
1617  * exists, but all sdevs on it are blocked from further I/O. The following
1618  * is then expected:
1619  *   If the remote port does not return (signaled by a LLDD call to
1620  *   fc_remote_port_add()) within the dev_loss_tmo timeout, then the
1621  *   scsi target is removed - killing all outstanding i/o and removing the
1622  *   scsi devices attached ot it. The port structure will be marked Not
1623  *   Present and be partially cleared, leaving only enough information to
1624  *   recognize the remote port relative to the scsi target id binding if
1625  *   it later appears.  The port will remain as long as there is a valid
1626  *   binding (e.g. until the user changes the binding type or unloads the
1627  *   scsi host with the binding).
1628  *
1629  *   If the remote port returns within the dev_loss_tmo value (and matches
1630  *   according to the target id binding type), the port structure will be
1631  *   reused. If it is no longer a SCSI target, the target will be torn
1632  *   down. If it continues to be a SCSI target, then the target will be
1633  *   unblocked (allowing i/o to be resumed), and a scan will be activated
1634  *   to ensure that all luns are detected.
1635  *
1636  * Called from normal process context only - cannot be called from interrupt.
1637  *
1638  * Notes:
1639  *      This routine assumes no locks are held on entry.
1640  **/
1641 void
1642 fc_remote_port_delete(struct fc_rport  *rport)
1643 {
1644         int timeout = rport->dev_loss_tmo;
1645
1646         /* If no scsi target id mapping, delete it */
1647         if (rport->scsi_target_id == -1) {
1648                 fc_rport_terminate(rport);
1649                 return;
1650         }
1651
1652         scsi_target_block(&rport->dev);
1653
1654         /* cap the length the devices can be blocked until they are deleted */
1655         schedule_delayed_work(&rport->dev_loss_work, timeout * HZ);
1656
1657         rport->port_state = FC_PORTSTATE_BLOCKED;
1658 }
1659 EXPORT_SYMBOL(fc_remote_port_delete);
1660
1661 /**
1662  * fc_remote_port_rolechg - notifies the fc transport that the roles
1663  *              on a remote may have changed.
1664  * @rport:      The remote port that changed.
1665  *
1666  * The LLDD calls this routine to notify the transport that the roles
1667  * on a remote port may have changed. The largest effect of this is
1668  * if a port now becomes a FCP Target, it must be allocated a
1669  * scsi target id.  If the port is no longer a FCP target, any
1670  * scsi target id value assigned to it will persist in case the
1671  * role changes back to include FCP Target. No changes in the scsi
1672  * midlayer will be invoked if the role changes (in the expectation
1673  * that the role will be resumed. If it doesn't normal error processing
1674  * will take place).
1675  *
1676  * Should not be called from interrupt context.
1677  *
1678  * Notes:
1679  *      This routine assumes no locks are held on entry.
1680  **/
1681 void
1682 fc_remote_port_rolechg(struct fc_rport  *rport, u32 roles)
1683 {
1684         struct Scsi_Host *shost = rport_to_shost(rport);
1685         struct fc_host_attrs *fc_host =
1686                         (struct fc_host_attrs *)shost->shost_data;
1687         unsigned long flags;
1688         int create = 0;
1689
1690         spin_lock_irqsave(shost->host_lock, flags);
1691         if (roles & FC_RPORT_ROLE_FCP_TARGET) {
1692                 if (rport->scsi_target_id == -1) {
1693                         rport->scsi_target_id = fc_host->next_target_id++;
1694                         create = 1;
1695                 } else if (!(rport->roles & FC_RPORT_ROLE_FCP_TARGET))
1696                         create = 1;
1697         }
1698         spin_unlock_irqrestore(shost->host_lock, flags);
1699
1700         rport->roles = roles;
1701
1702         if (create) {
1703                 /*
1704                  * There may have been a delete timer running on the
1705                  * port. Ensure that it is cancelled as we now know
1706                  * the port is an FCP Target.
1707                  * Note: we know the rport is exists and in an online
1708                  *  state as the LLDD would not have had an rport
1709                  *  reference to pass us.
1710                  *
1711                  * Take no action on the del_timer failure as the state
1712                  * machine state change will validate the
1713                  * transaction.
1714                  */
1715                 if (!cancel_delayed_work(&rport->dev_loss_work))
1716                         flush_scheduled_work();
1717
1718                 /* initiate a scan of the target */
1719                 scsi_queue_work(shost, &rport->scan_work);
1720         }
1721 }
1722 EXPORT_SYMBOL(fc_remote_port_rolechg);
1723
1724 /**
1725  * fc_timeout_deleted_rport - Timeout handler for a deleted remote port that
1726  *                       was a SCSI target (thus was blocked), and failed
1727  *                       to return in the alloted time.
1728  * 
1729  * @data:       rport target that failed to reappear in the alloted time.
1730  **/
1731 static void
1732 fc_timeout_deleted_rport(void  *data)
1733 {
1734         struct fc_rport *rport = (struct fc_rport *)data;
1735         struct Scsi_Host *shost = rport_to_shost(rport);
1736         unsigned long flags;
1737
1738         spin_lock_irqsave(shost->host_lock, flags);
1739
1740         /*
1741          * If the port is ONLINE, then it came back, but was no longer an
1742          * FCP target. Thus we need to tear down the scsi_target on it.
1743          */
1744         if (rport->port_state == FC_PORTSTATE_ONLINE) {
1745                 spin_unlock_irqrestore(shost->host_lock, flags);
1746
1747                 dev_printk(KERN_ERR, &rport->dev,
1748                         "blocked FC remote port time out: removing target\n");
1749
1750                 fc_rport_tgt_remove(rport);
1751
1752                 return;
1753         }
1754
1755         if (rport->port_state != FC_PORTSTATE_BLOCKED) {
1756                 spin_unlock_irqrestore(shost->host_lock, flags);
1757                 dev_printk(KERN_ERR, &rport->dev,
1758                         "blocked FC remote port time out: leaving target alone\n");
1759                 return;
1760         }
1761
1762         if (fc_host_tgtid_bind_type(shost) == FC_TGTID_BIND_NONE) {
1763                 spin_unlock_irqrestore(shost->host_lock, flags);
1764                 dev_printk(KERN_ERR, &rport->dev,
1765                         "blocked FC remote port time out: removing target\n");
1766                 fc_rport_terminate(rport);
1767                 return;
1768         }
1769
1770         dev_printk(KERN_ERR, &rport->dev,
1771                 "blocked FC remote port time out: removing target and "
1772                 "saving binding\n");
1773
1774         list_move_tail(&rport->peers, &fc_host_rport_bindings(shost));
1775
1776         /*
1777          * Note: We do not remove or clear the hostdata area. This allows
1778          *   host-specific target data to persist along with the
1779          *   scsi_target_id. It's up to the host to manage it's hostdata area.
1780          */
1781
1782         /*
1783          * Reinitialize port attributes that may change if the port comes back.
1784          */
1785         rport->maxframe_size = -1;
1786         rport->supported_classes = FC_COS_UNSPECIFIED;
1787         rport->roles = FC_RPORT_ROLE_UNKNOWN;
1788         rport->port_state = FC_PORTSTATE_DELETED;
1789
1790         /* remove the identifiers that aren't used in the consisting binding */
1791         switch (fc_host_tgtid_bind_type(shost)) {
1792         case FC_TGTID_BIND_BY_WWPN:
1793                 rport->node_name = -1;
1794                 rport->port_id = -1;
1795                 break;
1796         case FC_TGTID_BIND_BY_WWNN:
1797                 rport->port_name = -1;
1798                 rport->port_id = -1;
1799                 break;
1800         case FC_TGTID_BIND_BY_ID:
1801                 rport->node_name = -1;
1802                 rport->port_name = -1;
1803                 break;
1804         case FC_TGTID_BIND_NONE:        /* to keep compiler happy */
1805                 break;
1806         }
1807
1808         /*
1809          * As this only occurs if the remote port (scsi target)
1810          * went away and didn't come back - we'll remove
1811          * all attached scsi devices.
1812          *
1813          * We'll schedule the shost work item to perform the actual removal
1814          * to avoid recursion in the different flush calls if we perform
1815          * the removal in each target - and there are lots of targets
1816          * whose timeouts fire at the same time.
1817          */
1818
1819         if ( !(fc_host_flags(shost) & FC_SHOST_RPORT_DEL_SCHEDULED)) {
1820                 fc_host_flags(shost) |= FC_SHOST_RPORT_DEL_SCHEDULED;
1821                 scsi_queue_work(shost, &fc_host_rport_del_work(shost));
1822         }
1823
1824         spin_unlock_irqrestore(shost->host_lock, flags);
1825 }
1826
1827 /**
1828  * fc_scsi_scan_rport - called to perform a scsi scan on a remote port.
1829  *
1830  * Will unblock the target (in case it went away and has now come back),
1831  * then invoke a scan.
1832  *
1833  * @data:       remote port to be scanned.
1834  **/
1835 static void
1836 fc_scsi_scan_rport(void *data)
1837 {
1838         struct fc_rport *rport = (struct fc_rport *)data;
1839
1840         scsi_target_unblock(&rport->dev);
1841         scsi_scan_target(&rport->dev, rport->channel, rport->scsi_target_id,
1842                         SCAN_WILD_CARD, 1);
1843 }
1844
1845
1846 /**
1847  * fc_shost_remove_rports - called to remove all rports that are marked
1848  *                       as in a deleted (not connected) state.
1849  * 
1850  * @data:       shost whose rports are to be looked at
1851  **/
1852 static void
1853 fc_shost_remove_rports(void  *data)
1854 {
1855         struct Scsi_Host *shost = (struct Scsi_Host *)data;
1856         struct fc_rport *rport, *next_rport;
1857         unsigned long flags;
1858
1859         spin_lock_irqsave(shost->host_lock, flags);
1860         while (fc_host_flags(shost) & FC_SHOST_RPORT_DEL_SCHEDULED) {
1861
1862                 fc_host_flags(shost) &= ~FC_SHOST_RPORT_DEL_SCHEDULED;
1863
1864 restart_search:
1865                 list_for_each_entry_safe(rport, next_rport,
1866                                 &fc_host_rport_bindings(shost), peers) {
1867                         if (rport->port_state == FC_PORTSTATE_DELETED) {
1868                                 rport->port_state = FC_PORTSTATE_NOTPRESENT;
1869                                 spin_unlock_irqrestore(shost->host_lock, flags);
1870                                 fc_rport_tgt_remove(rport);
1871                                 spin_lock_irqsave(shost->host_lock, flags);
1872                                 goto restart_search;
1873                         }
1874                 }
1875
1876         }
1877         spin_unlock_irqrestore(shost->host_lock, flags);
1878 }
1879
1880
1881 MODULE_AUTHOR("Martin Hicks");
1882 MODULE_DESCRIPTION("FC Transport Attributes");
1883 MODULE_LICENSE("GPL");
1884
1885 module_init(fc_transport_init);
1886 module_exit(fc_transport_exit);