1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21 /*
22 * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
23 */
24 /*
25 * Copyright 2012, Nexenta Systems, Inc. All rights reserved.
26 * Copyright (c) 2013 by Delphix. All rights reserved.
27 * Copyright (c) 2013 by Saso Kiselkov. All rights reserved.
28 */
29
30 #include <sys/conf.h>
31 #include <sys/file.h>
32 #include <sys/ddi.h>
33 #include <sys/sunddi.h>
34 #include <sys/modctl.h>
35 #include <sys/scsi/scsi.h>
36 #include <sys/scsi/generic/persist.h>
37 #include <sys/scsi/impl/scsi_reset_notify.h>
38 #include <sys/disp.h>
39 #include <sys/byteorder.h>
40 #include <sys/atomic.h>
41 #include <sys/ethernet.h>
42 #include <sys/sdt.h>
43 #include <sys/nvpair.h>
44 #include <sys/zone.h>
45 #include <sys/id_space.h>
46
47 #include <sys/stmf.h>
48 #include <sys/lpif.h>
49 #include <sys/portif.h>
50 #include <sys/stmf_ioctl.h>
51 #include <sys/pppt_ic_if.h>
52
53 #include "stmf_impl.h"
54 #include "lun_map.h"
55 #include "stmf_state.h"
56 #include "stmf_stats.h"
57
58 /*
59 * Lock order:
60 * stmf_state_lock --> ilport_lock/iss_lockp --> ilu_task_lock
61 */
62
63 static uint64_t stmf_session_counter = 0;
64 static uint16_t stmf_rtpid_counter = 0;
65 /* start messages at 1 */
66 static uint64_t stmf_proxy_msg_id = 1;
67 #define MSG_ID_TM_BIT 0x8000000000000000
68 #define ALIGNED_TO_8BYTE_BOUNDARY(i) (((i) + 7) & ~7)
69
70 /*
71 * When stmf_io_deadman_enabled is set to B_TRUE, we check that finishing up
72 * I/O operations on an offlining LU doesn't take longer than stmf_io_deadman
73 * seconds. If it does, we trigger a panic to inform the user of hung I/O
74 * blocking us for too long.
75 */
76 boolean_t stmf_io_deadman_enabled = B_TRUE;
77 int stmf_io_deadman = 1000; /* seconds */
78
79 struct stmf_svc_clocks;
80
81 static int stmf_attach(dev_info_t *dip, ddi_attach_cmd_t cmd);
82 static int stmf_detach(dev_info_t *dip, ddi_detach_cmd_t cmd);
83 static int stmf_getinfo(dev_info_t *dip, ddi_info_cmd_t cmd, void *arg,
84 void **result);
85 static int stmf_open(dev_t *devp, int flag, int otype, cred_t *credp);
86 static int stmf_close(dev_t dev, int flag, int otype, cred_t *credp);
87 static int stmf_ioctl(dev_t dev, int cmd, intptr_t data, int mode,
88 cred_t *credp, int *rval);
89 static int stmf_get_stmf_state(stmf_state_desc_t *std);
90 static int stmf_set_stmf_state(stmf_state_desc_t *std);
91 static void stmf_abort_task_offline(scsi_task_t *task, int offline_lu,
92 char *info);
93 static int stmf_set_alua_state(stmf_alua_state_desc_t *alua_state);
94 static void stmf_get_alua_state(stmf_alua_state_desc_t *alua_state);
95
96 static void stmf_task_audit(stmf_i_scsi_task_t *itask,
97 task_audit_event_t te, uint32_t cmd_or_iof, stmf_data_buf_t *dbuf);
98
99 static boolean_t stmf_base16_str_to_binary(char *c, int dplen, uint8_t *dp);
100 static char stmf_ctoi(char c);
101 stmf_xfer_data_t *stmf_prepare_tpgs_data(uint8_t ilu_alua);
102 void stmf_svc_init();
103 stmf_status_t stmf_svc_fini();
104 void stmf_svc(void *arg);
105 static void stmf_wait_ilu_tasks_finish(stmf_i_lu_t *ilu);
106 void stmf_svc_queue(int cmd, void *obj, stmf_state_change_info_t *info);
107 static void stmf_svc_kill_obj_requests(void *obj);
108 static void stmf_svc_timeout(struct stmf_svc_clocks *);
109 void stmf_check_freetask();
110 void stmf_abort_target_reset(scsi_task_t *task);
111 stmf_status_t stmf_lun_reset_poll(stmf_lu_t *lu, struct scsi_task *task,
112 int target_reset);
113 void stmf_target_reset_poll(struct scsi_task *task);
114 void stmf_handle_lun_reset(scsi_task_t *task);
115 void stmf_handle_target_reset(scsi_task_t *task);
116 void stmf_xd_to_dbuf(stmf_data_buf_t *dbuf, int set_rel_off);
117 int stmf_load_ppd_ioctl(stmf_ppioctl_data_t *ppi, uint64_t *ppi_token,
118 uint32_t *err_ret);
119 int stmf_delete_ppd_ioctl(stmf_ppioctl_data_t *ppi);
120 int stmf_get_ppd_ioctl(stmf_ppioctl_data_t *ppi, stmf_ppioctl_data_t *ppi_out,
121 uint32_t *err_ret);
122 void stmf_delete_ppd(stmf_pp_data_t *ppd);
123 void stmf_delete_all_ppds();
124 void stmf_trace_clear();
125 void stmf_worker_init();
126 stmf_status_t stmf_worker_fini();
127 void stmf_worker_mgmt();
128 void stmf_worker_task(void *arg);
129 static void stmf_task_lu_free(scsi_task_t *task, stmf_i_scsi_session_t *iss);
130 static stmf_status_t stmf_ic_lu_reg(stmf_ic_reg_dereg_lun_msg_t *msg,
131 uint32_t type);
132 static stmf_status_t stmf_ic_lu_dereg(stmf_ic_reg_dereg_lun_msg_t *msg);
133 static stmf_status_t stmf_ic_rx_scsi_status(stmf_ic_scsi_status_msg_t *msg);
134 static stmf_status_t stmf_ic_rx_status(stmf_ic_status_msg_t *msg);
135 static stmf_status_t stmf_ic_rx_scsi_data(stmf_ic_scsi_data_msg_t *msg);
136 void stmf_task_lu_killall(stmf_lu_t *lu, scsi_task_t *tm_task, stmf_status_t s);
137
138 /* pppt modhandle */
139 ddi_modhandle_t pppt_mod;
140
141 /* pppt modload imported functions */
142 stmf_ic_reg_port_msg_alloc_func_t ic_reg_port_msg_alloc;
143 stmf_ic_dereg_port_msg_alloc_func_t ic_dereg_port_msg_alloc;
144 stmf_ic_reg_lun_msg_alloc_func_t ic_reg_lun_msg_alloc;
145 stmf_ic_dereg_lun_msg_alloc_func_t ic_dereg_lun_msg_alloc;
146 stmf_ic_lun_active_msg_alloc_func_t ic_lun_active_msg_alloc;
147 stmf_ic_scsi_cmd_msg_alloc_func_t ic_scsi_cmd_msg_alloc;
148 stmf_ic_scsi_data_xfer_done_msg_alloc_func_t ic_scsi_data_xfer_done_msg_alloc;
149 stmf_ic_session_create_msg_alloc_func_t ic_session_reg_msg_alloc;
150 stmf_ic_session_destroy_msg_alloc_func_t ic_session_dereg_msg_alloc;
151 stmf_ic_tx_msg_func_t ic_tx_msg;
152 stmf_ic_msg_free_func_t ic_msg_free;
153
154 static void stmf_itl_task_start(stmf_i_scsi_task_t *itask);
155 static void stmf_itl_lu_new_task(stmf_i_scsi_task_t *itask);
156 static void stmf_itl_task_done(stmf_i_scsi_task_t *itask);
157
158 static void stmf_lport_xfer_start(stmf_i_scsi_task_t *itask,
159 stmf_data_buf_t *dbuf);
160 static void stmf_lport_xfer_done(stmf_i_scsi_task_t *itask,
161 stmf_data_buf_t *dbuf);
162
163 static void stmf_update_kstat_lu_q(scsi_task_t *, void());
164 static void stmf_update_kstat_lport_q(scsi_task_t *, void());
165 static void stmf_update_kstat_lu_io(scsi_task_t *, stmf_data_buf_t *);
166 static void stmf_update_kstat_lport_io(scsi_task_t *, stmf_data_buf_t *);
167
168 static int stmf_irport_compare(const void *void_irport1,
169 const void *void_irport2);
170 static stmf_i_remote_port_t *stmf_irport_create(scsi_devid_desc_t *rport_devid);
171 static void stmf_irport_destroy(stmf_i_remote_port_t *irport);
172 static stmf_i_remote_port_t *stmf_irport_register(
173 scsi_devid_desc_t *rport_devid);
174 static stmf_i_remote_port_t *stmf_irport_lookup_locked(
175 scsi_devid_desc_t *rport_devid);
176 static void stmf_irport_deregister(stmf_i_remote_port_t *irport);
177
178 extern struct mod_ops mod_driverops;
179
180 /* =====[ Tunables ]===== */
181 /* Internal tracing */
182 volatile int stmf_trace_on = 1;
183 volatile int stmf_trace_buf_size = (1 * 1024 * 1024);
184 /*
185 * The reason default task timeout is 75 is because we want the
186 * host to timeout 1st and mostly host timeout is 60 seconds.
187 */
188 volatile int stmf_default_task_timeout = 75;
189 /*
190 * Setting this to one means, you are responsible for config load and keeping
191 * things in sync with persistent database.
192 */
193 volatile int stmf_allow_modunload = 0;
194
195 volatile int stmf_max_nworkers = 256;
196 volatile int stmf_min_nworkers = 4;
197 volatile int stmf_worker_scale_down_delay = 20;
198
199 /* === [ Debugging and fault injection ] === */
200 #ifdef DEBUG
201 volatile uint32_t stmf_drop_task_counter = 0;
202 volatile uint32_t stmf_drop_buf_counter = 0;
203
204 #endif
205
206 stmf_state_t stmf_state;
207 static stmf_lu_t *dlun0;
208
209 static uint8_t stmf_first_zero[] =
210 { 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0, 0xff };
211 static uint8_t stmf_first_one[] =
212 { 0xff, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0 };
213
214 static kmutex_t trace_buf_lock;
215 static int trace_buf_size;
216 static int trace_buf_curndx;
217 caddr_t stmf_trace_buf;
218
219 static enum {
220 STMF_WORKERS_DISABLED = 0,
221 STMF_WORKERS_ENABLING,
222 STMF_WORKERS_ENABLED
223 } stmf_workers_state = STMF_WORKERS_DISABLED;
224 static int stmf_i_max_nworkers;
225 static int stmf_i_min_nworkers;
226 static int stmf_nworkers_cur; /* # of workers currently running */
227 static int stmf_nworkers_needed; /* # of workers need to be running */
228 static int stmf_worker_sel_counter = 0;
229 static uint32_t stmf_cur_ntasks = 0;
230 static clock_t stmf_wm_last = 0;
231 /*
232 * This is equal to stmf_nworkers_cur while we are increasing # workers and
233 * stmf_nworkers_needed while we are decreasing the worker count.
234 */
235 static int stmf_nworkers_accepting_cmds;
236 static stmf_worker_t *stmf_workers = NULL;
237 static clock_t stmf_worker_mgmt_delay = 2;
238 static clock_t stmf_worker_scale_down_timer = 0;
239 static int stmf_worker_scale_down_qd = 0;
240
241 static struct cb_ops stmf_cb_ops = {
242 stmf_open, /* open */
243 stmf_close, /* close */
244 nodev, /* strategy */
245 nodev, /* print */
246 nodev, /* dump */
247 nodev, /* read */
248 nodev, /* write */
249 stmf_ioctl, /* ioctl */
250 nodev, /* devmap */
251 nodev, /* mmap */
252 nodev, /* segmap */
253 nochpoll, /* chpoll */
254 ddi_prop_op, /* cb_prop_op */
255 0, /* streamtab */
256 D_NEW | D_MP, /* cb_flag */
257 CB_REV, /* rev */
258 nodev, /* aread */
259 nodev /* awrite */
260 };
261
262 static struct dev_ops stmf_ops = {
263 DEVO_REV,
264 0,
265 stmf_getinfo,
266 nulldev, /* identify */
267 nulldev, /* probe */
268 stmf_attach,
269 stmf_detach,
270 nodev, /* reset */
271 &stmf_cb_ops,
272 NULL, /* bus_ops */
273 NULL /* power */
274 };
275
276 #define STMF_NAME "COMSTAR STMF"
277 #define STMF_MODULE_NAME "stmf"
278
279 static struct modldrv modldrv = {
280 &mod_driverops,
281 STMF_NAME,
282 &stmf_ops
283 };
284
285 static struct modlinkage modlinkage = {
286 MODREV_1,
287 &modldrv,
288 NULL
289 };
290
291 int
_init(void)292 _init(void)
293 {
294 int ret;
295
296 ret = mod_install(&modlinkage);
297 if (ret)
298 return (ret);
299 stmf_trace_buf = kmem_zalloc(stmf_trace_buf_size, KM_SLEEP);
300 trace_buf_size = stmf_trace_buf_size;
301 trace_buf_curndx = 0;
302 mutex_init(&trace_buf_lock, NULL, MUTEX_DRIVER, 0);
303 bzero(&stmf_state, sizeof (stmf_state_t));
304 /* STMF service is off by default */
305 stmf_state.stmf_service_running = 0;
306 /* default lu/lport states are online */
307 stmf_state.stmf_default_lu_state = STMF_STATE_ONLINE;
308 stmf_state.stmf_default_lport_state = STMF_STATE_ONLINE;
309 mutex_init(&stmf_state.stmf_lock, NULL, MUTEX_DRIVER, NULL);
310 cv_init(&stmf_state.stmf_cv, NULL, CV_DRIVER, NULL);
311 stmf_session_counter = (uint64_t)ddi_get_lbolt();
312 avl_create(&stmf_state.stmf_irportlist,
313 stmf_irport_compare, sizeof (stmf_i_remote_port_t),
314 offsetof(stmf_i_remote_port_t, irport_ln));
315 stmf_state.stmf_ilport_inst_space =
316 id_space_create("lport-instances", 0, MAX_ILPORT);
317 stmf_state.stmf_irport_inst_space =
318 id_space_create("rport-instances", 0, MAX_IRPORT);
319 stmf_view_init();
320 stmf_svc_init();
321 stmf_dlun_init();
322 return (ret);
323 }
324
325 int
_fini(void)326 _fini(void)
327 {
328 int ret;
329 stmf_i_remote_port_t *irport;
330 void *avl_dest_cookie = NULL;
331
332 if (stmf_state.stmf_service_running)
333 return (EBUSY);
334 if ((!stmf_allow_modunload) &&
335 (stmf_state.stmf_config_state != STMF_CONFIG_NONE)) {
336 return (EBUSY);
337 }
338 if (stmf_state.stmf_nlps || stmf_state.stmf_npps) {
339 return (EBUSY);
340 }
341 if (stmf_dlun_fini() != STMF_SUCCESS)
342 return (EBUSY);
343 if (stmf_worker_fini() != STMF_SUCCESS) {
344 stmf_dlun_init();
345 return (EBUSY);
346 }
347 if (stmf_svc_fini() != STMF_SUCCESS) {
348 stmf_dlun_init();
349 stmf_worker_init();
350 return (EBUSY);
351 }
352
353 ret = mod_remove(&modlinkage);
354 if (ret) {
355 stmf_svc_init();
356 stmf_dlun_init();
357 stmf_worker_init();
358 return (ret);
359 }
360
361 stmf_view_clear_config();
362
363 while ((irport = avl_destroy_nodes(&stmf_state.stmf_irportlist,
364 &avl_dest_cookie)) != NULL)
365 stmf_irport_destroy(irport);
366 avl_destroy(&stmf_state.stmf_irportlist);
367 id_space_destroy(stmf_state.stmf_ilport_inst_space);
368 id_space_destroy(stmf_state.stmf_irport_inst_space);
369
370 kmem_free(stmf_trace_buf, stmf_trace_buf_size);
371 mutex_destroy(&trace_buf_lock);
372 mutex_destroy(&stmf_state.stmf_lock);
373 cv_destroy(&stmf_state.stmf_cv);
374 return (ret);
375 }
376
377 int
_info(struct modinfo * modinfop)378 _info(struct modinfo *modinfop)
379 {
380 return (mod_info(&modlinkage, modinfop));
381 }
382
383 /* ARGSUSED */
384 static int
stmf_getinfo(dev_info_t * dip,ddi_info_cmd_t cmd,void * arg,void ** result)385 stmf_getinfo(dev_info_t *dip, ddi_info_cmd_t cmd, void *arg, void **result)
386 {
387 switch (cmd) {
388 case DDI_INFO_DEVT2DEVINFO:
389 *result = stmf_state.stmf_dip;
390 break;
391 case DDI_INFO_DEVT2INSTANCE:
392 *result =
393 (void *)(uintptr_t)ddi_get_instance(stmf_state.stmf_dip);
394 break;
395 default:
396 return (DDI_FAILURE);
397 }
398
399 return (DDI_SUCCESS);
400 }
401
402 static int
stmf_attach(dev_info_t * dip,ddi_attach_cmd_t cmd)403 stmf_attach(dev_info_t *dip, ddi_attach_cmd_t cmd)
404 {
405 switch (cmd) {
406 case DDI_ATTACH:
407 stmf_state.stmf_dip = dip;
408
409 if (ddi_create_minor_node(dip, "admin", S_IFCHR, 0,
410 DDI_NT_STMF, 0) != DDI_SUCCESS) {
411 break;
412 }
413 ddi_report_dev(dip);
414 return (DDI_SUCCESS);
415 }
416
417 return (DDI_FAILURE);
418 }
419
420 static int
stmf_detach(dev_info_t * dip,ddi_detach_cmd_t cmd)421 stmf_detach(dev_info_t *dip, ddi_detach_cmd_t cmd)
422 {
423 switch (cmd) {
424 case DDI_DETACH:
425 ddi_remove_minor_node(dip, 0);
426 return (DDI_SUCCESS);
427 }
428
429 return (DDI_FAILURE);
430 }
431
432 /* ARGSUSED */
433 static int
stmf_open(dev_t * devp,int flag,int otype,cred_t * credp)434 stmf_open(dev_t *devp, int flag, int otype, cred_t *credp)
435 {
436 mutex_enter(&stmf_state.stmf_lock);
437 if (stmf_state.stmf_exclusive_open) {
438 mutex_exit(&stmf_state.stmf_lock);
439 return (EBUSY);
440 }
441 if (flag & FEXCL) {
442 if (stmf_state.stmf_opened) {
443 mutex_exit(&stmf_state.stmf_lock);
444 return (EBUSY);
445 }
446 stmf_state.stmf_exclusive_open = 1;
447 }
448 stmf_state.stmf_opened = 1;
449 mutex_exit(&stmf_state.stmf_lock);
450 return (0);
451 }
452
453 /* ARGSUSED */
454 static int
stmf_close(dev_t dev,int flag,int otype,cred_t * credp)455 stmf_close(dev_t dev, int flag, int otype, cred_t *credp)
456 {
457 mutex_enter(&stmf_state.stmf_lock);
458 stmf_state.stmf_opened = 0;
459 if (stmf_state.stmf_exclusive_open &&
460 (stmf_state.stmf_config_state != STMF_CONFIG_INIT_DONE)) {
461 stmf_state.stmf_config_state = STMF_CONFIG_NONE;
462 stmf_delete_all_ppds();
463 stmf_view_clear_config();
464 stmf_view_init();
465 }
466 stmf_state.stmf_exclusive_open = 0;
467 mutex_exit(&stmf_state.stmf_lock);
468 return (0);
469 }
470
471 int
stmf_copyin_iocdata(intptr_t data,int mode,stmf_iocdata_t ** iocd,void ** ibuf,void ** obuf)472 stmf_copyin_iocdata(intptr_t data, int mode, stmf_iocdata_t **iocd,
473 void **ibuf, void **obuf)
474 {
475 int ret;
476
477 *ibuf = NULL;
478 *obuf = NULL;
479 *iocd = kmem_zalloc(sizeof (stmf_iocdata_t), KM_SLEEP);
480
481 ret = ddi_copyin((void *)data, *iocd, sizeof (stmf_iocdata_t), mode);
482 if (ret)
483 return (EFAULT);
484 if ((*iocd)->stmf_version != STMF_VERSION_1) {
485 ret = EINVAL;
486 goto copyin_iocdata_done;
487 }
488 if ((*iocd)->stmf_ibuf_size) {
489 *ibuf = kmem_zalloc((*iocd)->stmf_ibuf_size, KM_SLEEP);
490 ret = ddi_copyin((void *)((unsigned long)(*iocd)->stmf_ibuf),
491 *ibuf, (*iocd)->stmf_ibuf_size, mode);
492 }
493 if ((*iocd)->stmf_obuf_size)
494 *obuf = kmem_zalloc((*iocd)->stmf_obuf_size, KM_SLEEP);
495
496 if (ret == 0)
497 return (0);
498 ret = EFAULT;
499 copyin_iocdata_done:;
500 if (*obuf) {
501 kmem_free(*obuf, (*iocd)->stmf_obuf_size);
502 *obuf = NULL;
503 }
504 if (*ibuf) {
505 kmem_free(*ibuf, (*iocd)->stmf_ibuf_size);
506 *ibuf = NULL;
507 }
508 kmem_free(*iocd, sizeof (stmf_iocdata_t));
509 return (ret);
510 }
511
512 int
stmf_copyout_iocdata(intptr_t data,int mode,stmf_iocdata_t * iocd,void * obuf)513 stmf_copyout_iocdata(intptr_t data, int mode, stmf_iocdata_t *iocd, void *obuf)
514 {
515 int ret;
516
517 if (iocd->stmf_obuf_size) {
518 ret = ddi_copyout(obuf, (void *)(unsigned long)iocd->stmf_obuf,
519 iocd->stmf_obuf_size, mode);
520 if (ret)
521 return (EFAULT);
522 }
523 ret = ddi_copyout(iocd, (void *)data, sizeof (stmf_iocdata_t), mode);
524 if (ret)
525 return (EFAULT);
526 return (0);
527 }
528
529 /* ARGSUSED */
530 static int
stmf_ioctl(dev_t dev,int cmd,intptr_t data,int mode,cred_t * credp,int * rval)531 stmf_ioctl(dev_t dev, int cmd, intptr_t data, int mode,
532 cred_t *credp, int *rval)
533 {
534 stmf_iocdata_t *iocd;
535 void *ibuf = NULL, *obuf = NULL;
536 slist_lu_t *luid_list;
537 slist_target_port_t *lportid_list;
538 stmf_i_lu_t *ilu;
539 stmf_i_local_port_t *ilport;
540 stmf_i_scsi_session_t *iss;
541 slist_scsi_session_t *iss_list;
542 sioc_lu_props_t *lup;
543 sioc_target_port_props_t *lportp;
544 stmf_ppioctl_data_t *ppi, *ppi_out = NULL;
545 uint64_t *ppi_token = NULL;
546 uint8_t *p_id, *id;
547 stmf_state_desc_t *std;
548 stmf_status_t ctl_ret;
549 stmf_state_change_info_t ssi;
550 int ret = 0;
551 uint32_t n;
552 int i;
553 stmf_group_op_data_t *grp_entry;
554 stmf_group_name_t *grpname;
555 stmf_view_op_entry_t *ve;
556 stmf_id_type_t idtype;
557 stmf_id_data_t *id_entry;
558 stmf_id_list_t *id_list;
559 stmf_view_entry_t *view_entry;
560 stmf_set_props_t *stmf_set_props;
561 uint32_t veid;
562 if ((cmd & 0xff000000) != STMF_IOCTL) {
563 return (ENOTTY);
564 }
565
566 if (drv_priv(credp) != 0) {
567 return (EPERM);
568 }
569
570 ret = stmf_copyin_iocdata(data, mode, &iocd, &ibuf, &obuf);
571 if (ret)
572 return (ret);
573 iocd->stmf_error = 0;
574
575 switch (cmd) {
576 case STMF_IOCTL_LU_LIST:
577 /* retrieves both registered/unregistered */
578 mutex_enter(&stmf_state.stmf_lock);
579 id_list = &stmf_state.stmf_luid_list;
580 n = min(id_list->id_count,
581 (iocd->stmf_obuf_size)/sizeof (slist_lu_t));
582 iocd->stmf_obuf_max_nentries = id_list->id_count;
583 luid_list = (slist_lu_t *)obuf;
584 id_entry = id_list->idl_head;
585 for (i = 0; i < n; i++) {
586 bcopy(id_entry->id_data, luid_list[i].lu_guid, 16);
587 id_entry = id_entry->id_next;
588 }
589
590 n = iocd->stmf_obuf_size/sizeof (slist_lu_t);
591 for (ilu = stmf_state.stmf_ilulist; ilu; ilu = ilu->ilu_next) {
592 id = (uint8_t *)ilu->ilu_lu->lu_id;
593 if (stmf_lookup_id(id_list, 16, id + 4) == NULL) {
594 iocd->stmf_obuf_max_nentries++;
595 if (i < n) {
596 bcopy(id + 4, luid_list[i].lu_guid,
597 sizeof (slist_lu_t));
598 i++;
599 }
600 }
601 }
602 iocd->stmf_obuf_nentries = i;
603 mutex_exit(&stmf_state.stmf_lock);
604 break;
605
606 case STMF_IOCTL_REG_LU_LIST:
607 mutex_enter(&stmf_state.stmf_lock);
608 iocd->stmf_obuf_max_nentries = stmf_state.stmf_nlus;
609 n = min(stmf_state.stmf_nlus,
610 (iocd->stmf_obuf_size)/sizeof (slist_lu_t));
611 iocd->stmf_obuf_nentries = n;
612 ilu = stmf_state.stmf_ilulist;
613 luid_list = (slist_lu_t *)obuf;
614 for (i = 0; i < n; i++) {
615 uint8_t *id;
616 id = (uint8_t *)ilu->ilu_lu->lu_id;
617 bcopy(id + 4, luid_list[i].lu_guid, 16);
618 ilu = ilu->ilu_next;
619 }
620 mutex_exit(&stmf_state.stmf_lock);
621 break;
622
623 case STMF_IOCTL_VE_LU_LIST:
624 mutex_enter(&stmf_state.stmf_lock);
625 id_list = &stmf_state.stmf_luid_list;
626 n = min(id_list->id_count,
627 (iocd->stmf_obuf_size)/sizeof (slist_lu_t));
628 iocd->stmf_obuf_max_nentries = id_list->id_count;
629 iocd->stmf_obuf_nentries = n;
630 luid_list = (slist_lu_t *)obuf;
631 id_entry = id_list->idl_head;
632 for (i = 0; i < n; i++) {
633 bcopy(id_entry->id_data, luid_list[i].lu_guid, 16);
634 id_entry = id_entry->id_next;
635 }
636 mutex_exit(&stmf_state.stmf_lock);
637 break;
638
639 case STMF_IOCTL_TARGET_PORT_LIST:
640 mutex_enter(&stmf_state.stmf_lock);
641 iocd->stmf_obuf_max_nentries = stmf_state.stmf_nlports;
642 n = min(stmf_state.stmf_nlports,
643 (iocd->stmf_obuf_size)/sizeof (slist_target_port_t));
644 iocd->stmf_obuf_nentries = n;
645 ilport = stmf_state.stmf_ilportlist;
646 lportid_list = (slist_target_port_t *)obuf;
647 for (i = 0; i < n; i++) {
648 uint8_t *id;
649 id = (uint8_t *)ilport->ilport_lport->lport_id;
650 bcopy(id, lportid_list[i].target, id[3] + 4);
651 ilport = ilport->ilport_next;
652 }
653 mutex_exit(&stmf_state.stmf_lock);
654 break;
655
656 case STMF_IOCTL_SESSION_LIST:
657 p_id = (uint8_t *)ibuf;
658 if ((p_id == NULL) || (iocd->stmf_ibuf_size < 4) ||
659 (iocd->stmf_ibuf_size < (p_id[3] + 4))) {
660 ret = EINVAL;
661 break;
662 }
663 mutex_enter(&stmf_state.stmf_lock);
664 for (ilport = stmf_state.stmf_ilportlist; ilport; ilport =
665 ilport->ilport_next) {
666 uint8_t *id;
667 id = (uint8_t *)ilport->ilport_lport->lport_id;
668 if ((p_id[3] == id[3]) &&
669 (bcmp(p_id + 4, id + 4, id[3]) == 0)) {
670 break;
671 }
672 }
673 if (ilport == NULL) {
674 mutex_exit(&stmf_state.stmf_lock);
675 ret = ENOENT;
676 break;
677 }
678 iocd->stmf_obuf_max_nentries = ilport->ilport_nsessions;
679 n = min(ilport->ilport_nsessions,
680 (iocd->stmf_obuf_size)/sizeof (slist_scsi_session_t));
681 iocd->stmf_obuf_nentries = n;
682 iss = ilport->ilport_ss_list;
683 iss_list = (slist_scsi_session_t *)obuf;
684 for (i = 0; i < n; i++) {
685 uint8_t *id;
686 id = (uint8_t *)iss->iss_ss->ss_rport_id;
687 bcopy(id, iss_list[i].initiator, id[3] + 4);
688 iss_list[i].creation_time = (uint32_t)
689 iss->iss_creation_time;
690 if (iss->iss_ss->ss_rport_alias) {
691 (void) strncpy(iss_list[i].alias,
692 iss->iss_ss->ss_rport_alias, 255);
693 iss_list[i].alias[255] = 0;
694 } else {
695 iss_list[i].alias[0] = 0;
696 }
697 iss = iss->iss_next;
698 }
699 mutex_exit(&stmf_state.stmf_lock);
700 break;
701
702 case STMF_IOCTL_GET_LU_PROPERTIES:
703 p_id = (uint8_t *)ibuf;
704 if ((iocd->stmf_ibuf_size < 16) ||
705 (iocd->stmf_obuf_size < sizeof (sioc_lu_props_t)) ||
706 (p_id[0] == 0)) {
707 ret = EINVAL;
708 break;
709 }
710 mutex_enter(&stmf_state.stmf_lock);
711 for (ilu = stmf_state.stmf_ilulist; ilu; ilu = ilu->ilu_next) {
712 if (bcmp(p_id, ilu->ilu_lu->lu_id->ident, 16) == 0)
713 break;
714 }
715 if (ilu == NULL) {
716 mutex_exit(&stmf_state.stmf_lock);
717 ret = ENOENT;
718 break;
719 }
720 lup = (sioc_lu_props_t *)obuf;
721 bcopy(ilu->ilu_lu->lu_id->ident, lup->lu_guid, 16);
722 lup->lu_state = ilu->ilu_state & 0x0f;
723 lup->lu_present = 1; /* XXX */
724 (void) strncpy(lup->lu_provider_name,
725 ilu->ilu_lu->lu_lp->lp_name, 255);
726 lup->lu_provider_name[254] = 0;
727 if (ilu->ilu_lu->lu_alias) {
728 (void) strncpy(lup->lu_alias,
729 ilu->ilu_lu->lu_alias, 255);
730 lup->lu_alias[255] = 0;
731 } else {
732 lup->lu_alias[0] = 0;
733 }
734 mutex_exit(&stmf_state.stmf_lock);
735 break;
736
737 case STMF_IOCTL_GET_TARGET_PORT_PROPERTIES:
738 p_id = (uint8_t *)ibuf;
739 if ((p_id == NULL) ||
740 (iocd->stmf_ibuf_size < (p_id[3] + 4)) ||
741 (iocd->stmf_obuf_size <
742 sizeof (sioc_target_port_props_t))) {
743 ret = EINVAL;
744 break;
745 }
746 mutex_enter(&stmf_state.stmf_lock);
747 for (ilport = stmf_state.stmf_ilportlist; ilport;
748 ilport = ilport->ilport_next) {
749 uint8_t *id;
750 id = (uint8_t *)ilport->ilport_lport->lport_id;
751 if ((p_id[3] == id[3]) &&
752 (bcmp(p_id+4, id+4, id[3]) == 0))
753 break;
754 }
755 if (ilport == NULL) {
756 mutex_exit(&stmf_state.stmf_lock);
757 ret = ENOENT;
758 break;
759 }
760 lportp = (sioc_target_port_props_t *)obuf;
761 bcopy(ilport->ilport_lport->lport_id, lportp->tgt_id,
762 ilport->ilport_lport->lport_id->ident_length + 4);
763 lportp->tgt_state = ilport->ilport_state & 0x0f;
764 lportp->tgt_present = 1; /* XXX */
765 (void) strncpy(lportp->tgt_provider_name,
766 ilport->ilport_lport->lport_pp->pp_name, 255);
767 lportp->tgt_provider_name[254] = 0;
768 if (ilport->ilport_lport->lport_alias) {
769 (void) strncpy(lportp->tgt_alias,
770 ilport->ilport_lport->lport_alias, 255);
771 lportp->tgt_alias[255] = 0;
772 } else {
773 lportp->tgt_alias[0] = 0;
774 }
775 mutex_exit(&stmf_state.stmf_lock);
776 break;
777
778 case STMF_IOCTL_SET_STMF_STATE:
779 if ((ibuf == NULL) ||
780 (iocd->stmf_ibuf_size < sizeof (stmf_state_desc_t))) {
781 ret = EINVAL;
782 break;
783 }
784 ret = stmf_set_stmf_state((stmf_state_desc_t *)ibuf);
785 break;
786
787 case STMF_IOCTL_GET_STMF_STATE:
788 if ((obuf == NULL) ||
789 (iocd->stmf_obuf_size < sizeof (stmf_state_desc_t))) {
790 ret = EINVAL;
791 break;
792 }
793 ret = stmf_get_stmf_state((stmf_state_desc_t *)obuf);
794 break;
795
796 case STMF_IOCTL_SET_ALUA_STATE:
797 if ((ibuf == NULL) ||
798 (iocd->stmf_ibuf_size < sizeof (stmf_alua_state_desc_t))) {
799 ret = EINVAL;
800 break;
801 }
802 ret = stmf_set_alua_state((stmf_alua_state_desc_t *)ibuf);
803 break;
804
805 case STMF_IOCTL_GET_ALUA_STATE:
806 if ((obuf == NULL) ||
807 (iocd->stmf_obuf_size < sizeof (stmf_alua_state_desc_t))) {
808 ret = EINVAL;
809 break;
810 }
811 stmf_get_alua_state((stmf_alua_state_desc_t *)obuf);
812 break;
813
814 case STMF_IOCTL_SET_LU_STATE:
815 ssi.st_rflags = STMF_RFLAG_USER_REQUEST;
816 ssi.st_additional_info = NULL;
817 std = (stmf_state_desc_t *)ibuf;
818 if ((ibuf == NULL) ||
819 (iocd->stmf_ibuf_size < sizeof (stmf_state_desc_t))) {
820 ret = EINVAL;
821 break;
822 }
823 p_id = std->ident;
824 mutex_enter(&stmf_state.stmf_lock);
825 if (stmf_state.stmf_inventory_locked) {
826 mutex_exit(&stmf_state.stmf_lock);
827 ret = EBUSY;
828 break;
829 }
830 for (ilu = stmf_state.stmf_ilulist; ilu; ilu = ilu->ilu_next) {
831 if (bcmp(p_id, ilu->ilu_lu->lu_id->ident, 16) == 0)
832 break;
833 }
834 if (ilu == NULL) {
835 mutex_exit(&stmf_state.stmf_lock);
836 ret = ENOENT;
837 break;
838 }
839 stmf_state.stmf_inventory_locked = 1;
840 mutex_exit(&stmf_state.stmf_lock);
841 cmd = (std->state == STMF_STATE_ONLINE) ? STMF_CMD_LU_ONLINE :
842 STMF_CMD_LU_OFFLINE;
843 ctl_ret = stmf_ctl(cmd, (void *)ilu->ilu_lu, &ssi);
844 if (ctl_ret == STMF_ALREADY)
845 ret = 0;
846 else if (ctl_ret == STMF_BUSY)
847 ret = EBUSY;
848 else if (ctl_ret != STMF_SUCCESS)
849 ret = EIO;
850 mutex_enter(&stmf_state.stmf_lock);
851 stmf_state.stmf_inventory_locked = 0;
852 mutex_exit(&stmf_state.stmf_lock);
853 break;
854
855 case STMF_IOCTL_SET_STMF_PROPS:
856 if ((ibuf == NULL) ||
857 (iocd->stmf_ibuf_size < sizeof (stmf_set_props_t))) {
858 ret = EINVAL;
859 break;
860 }
861 stmf_set_props = (stmf_set_props_t *)ibuf;
862 mutex_enter(&stmf_state.stmf_lock);
863 if ((stmf_set_props->default_lu_state_value ==
864 STMF_STATE_OFFLINE) ||
865 (stmf_set_props->default_lu_state_value ==
866 STMF_STATE_ONLINE)) {
867 stmf_state.stmf_default_lu_state =
868 stmf_set_props->default_lu_state_value;
869 }
870 if ((stmf_set_props->default_target_state_value ==
871 STMF_STATE_OFFLINE) ||
872 (stmf_set_props->default_target_state_value ==
873 STMF_STATE_ONLINE)) {
874 stmf_state.stmf_default_lport_state =
875 stmf_set_props->default_target_state_value;
876 }
877
878 mutex_exit(&stmf_state.stmf_lock);
879 break;
880
881 case STMF_IOCTL_SET_TARGET_PORT_STATE:
882 ssi.st_rflags = STMF_RFLAG_USER_REQUEST;
883 ssi.st_additional_info = NULL;
884 std = (stmf_state_desc_t *)ibuf;
885 if ((ibuf == NULL) ||
886 (iocd->stmf_ibuf_size < sizeof (stmf_state_desc_t))) {
887 ret = EINVAL;
888 break;
889 }
890 p_id = std->ident;
891 mutex_enter(&stmf_state.stmf_lock);
892 if (stmf_state.stmf_inventory_locked) {
893 mutex_exit(&stmf_state.stmf_lock);
894 ret = EBUSY;
895 break;
896 }
897 for (ilport = stmf_state.stmf_ilportlist; ilport;
898 ilport = ilport->ilport_next) {
899 uint8_t *id;
900 id = (uint8_t *)ilport->ilport_lport->lport_id;
901 if ((id[3] == p_id[3]) &&
902 (bcmp(id+4, p_id+4, id[3]) == 0)) {
903 break;
904 }
905 }
906 if (ilport == NULL) {
907 mutex_exit(&stmf_state.stmf_lock);
908 ret = ENOENT;
909 break;
910 }
911 stmf_state.stmf_inventory_locked = 1;
912 mutex_exit(&stmf_state.stmf_lock);
913 cmd = (std->state == STMF_STATE_ONLINE) ?
914 STMF_CMD_LPORT_ONLINE : STMF_CMD_LPORT_OFFLINE;
915 ctl_ret = stmf_ctl(cmd, (void *)ilport->ilport_lport, &ssi);
916 if (ctl_ret == STMF_ALREADY)
917 ret = 0;
918 else if (ctl_ret == STMF_BUSY)
919 ret = EBUSY;
920 else if (ctl_ret != STMF_SUCCESS)
921 ret = EIO;
922 mutex_enter(&stmf_state.stmf_lock);
923 stmf_state.stmf_inventory_locked = 0;
924 mutex_exit(&stmf_state.stmf_lock);
925 break;
926
927 case STMF_IOCTL_ADD_HG_ENTRY:
928 idtype = STMF_ID_TYPE_HOST;
929 /* FALLTHROUGH */
930 case STMF_IOCTL_ADD_TG_ENTRY:
931 if (stmf_state.stmf_config_state == STMF_CONFIG_NONE) {
932 ret = EACCES;
933 iocd->stmf_error = STMF_IOCERR_UPDATE_NEED_CFG_INIT;
934 break;
935 }
936 if (cmd == STMF_IOCTL_ADD_TG_ENTRY) {
937 idtype = STMF_ID_TYPE_TARGET;
938 }
939 grp_entry = (stmf_group_op_data_t *)ibuf;
940 if ((ibuf == NULL) ||
941 (iocd->stmf_ibuf_size < sizeof (stmf_group_op_data_t))) {
942 ret = EINVAL;
943 break;
944 }
945 if (grp_entry->group.name[0] == '*') {
946 ret = EINVAL;
947 break; /* not allowed */
948 }
949 mutex_enter(&stmf_state.stmf_lock);
950 ret = stmf_add_group_member(grp_entry->group.name,
951 grp_entry->group.name_size,
952 grp_entry->ident + 4,
953 grp_entry->ident[3],
954 idtype,
955 &iocd->stmf_error);
956 mutex_exit(&stmf_state.stmf_lock);
957 break;
958 case STMF_IOCTL_REMOVE_HG_ENTRY:
959 idtype = STMF_ID_TYPE_HOST;
960 /* FALLTHROUGH */
961 case STMF_IOCTL_REMOVE_TG_ENTRY:
962 if (stmf_state.stmf_config_state == STMF_CONFIG_NONE) {
963 ret = EACCES;
964 iocd->stmf_error = STMF_IOCERR_UPDATE_NEED_CFG_INIT;
965 break;
966 }
967 if (cmd == STMF_IOCTL_REMOVE_TG_ENTRY) {
968 idtype = STMF_ID_TYPE_TARGET;
969 }
970 grp_entry = (stmf_group_op_data_t *)ibuf;
971 if ((ibuf == NULL) ||
972 (iocd->stmf_ibuf_size < sizeof (stmf_group_op_data_t))) {
973 ret = EINVAL;
974 break;
975 }
976 if (grp_entry->group.name[0] == '*') {
977 ret = EINVAL;
978 break; /* not allowed */
979 }
980 mutex_enter(&stmf_state.stmf_lock);
981 ret = stmf_remove_group_member(grp_entry->group.name,
982 grp_entry->group.name_size,
983 grp_entry->ident + 4,
984 grp_entry->ident[3],
985 idtype,
986 &iocd->stmf_error);
987 mutex_exit(&stmf_state.stmf_lock);
988 break;
989 case STMF_IOCTL_CREATE_HOST_GROUP:
990 idtype = STMF_ID_TYPE_HOST_GROUP;
991 /* FALLTHROUGH */
992 case STMF_IOCTL_CREATE_TARGET_GROUP:
993 if (stmf_state.stmf_config_state == STMF_CONFIG_NONE) {
994 ret = EACCES;
995 iocd->stmf_error = STMF_IOCERR_UPDATE_NEED_CFG_INIT;
996 break;
997 }
998 grpname = (stmf_group_name_t *)ibuf;
999
1000 if (cmd == STMF_IOCTL_CREATE_TARGET_GROUP)
1001 idtype = STMF_ID_TYPE_TARGET_GROUP;
1002 if ((ibuf == NULL) ||
1003 (iocd->stmf_ibuf_size < sizeof (stmf_group_name_t))) {
1004 ret = EINVAL;
1005 break;
1006 }
1007 if (grpname->name[0] == '*') {
1008 ret = EINVAL;
1009 break; /* not allowed */
1010 }
1011 mutex_enter(&stmf_state.stmf_lock);
1012 ret = stmf_add_group(grpname->name,
1013 grpname->name_size, idtype, &iocd->stmf_error);
1014 mutex_exit(&stmf_state.stmf_lock);
1015 break;
1016 case STMF_IOCTL_REMOVE_HOST_GROUP:
1017 idtype = STMF_ID_TYPE_HOST_GROUP;
1018 /* FALLTHROUGH */
1019 case STMF_IOCTL_REMOVE_TARGET_GROUP:
1020 if (stmf_state.stmf_config_state == STMF_CONFIG_NONE) {
1021 ret = EACCES;
1022 iocd->stmf_error = STMF_IOCERR_UPDATE_NEED_CFG_INIT;
1023 break;
1024 }
1025 grpname = (stmf_group_name_t *)ibuf;
1026 if (cmd == STMF_IOCTL_REMOVE_TARGET_GROUP)
1027 idtype = STMF_ID_TYPE_TARGET_GROUP;
1028 if ((ibuf == NULL) ||
1029 (iocd->stmf_ibuf_size < sizeof (stmf_group_name_t))) {
1030 ret = EINVAL;
1031 break;
1032 }
1033 if (grpname->name[0] == '*') {
1034 ret = EINVAL;
1035 break; /* not allowed */
1036 }
1037 mutex_enter(&stmf_state.stmf_lock);
1038 ret = stmf_remove_group(grpname->name,
1039 grpname->name_size, idtype, &iocd->stmf_error);
1040 mutex_exit(&stmf_state.stmf_lock);
1041 break;
1042 case STMF_IOCTL_VALIDATE_VIEW:
1043 case STMF_IOCTL_ADD_VIEW_ENTRY:
1044 if (stmf_state.stmf_config_state == STMF_CONFIG_NONE) {
1045 ret = EACCES;
1046 iocd->stmf_error = STMF_IOCERR_UPDATE_NEED_CFG_INIT;
1047 break;
1048 }
1049 ve = (stmf_view_op_entry_t *)ibuf;
1050 if ((ibuf == NULL) ||
1051 (iocd->stmf_ibuf_size < sizeof (stmf_view_op_entry_t))) {
1052 ret = EINVAL;
1053 break;
1054 }
1055 if (!ve->ve_lu_number_valid)
1056 ve->ve_lu_nbr[2] = 0xFF;
1057 if (ve->ve_all_hosts) {
1058 ve->ve_host_group.name[0] = '*';
1059 ve->ve_host_group.name_size = 1;
1060 }
1061 if (ve->ve_all_targets) {
1062 ve->ve_target_group.name[0] = '*';
1063 ve->ve_target_group.name_size = 1;
1064 }
1065 if (ve->ve_ndx_valid)
1066 veid = ve->ve_ndx;
1067 else
1068 veid = 0xffffffff;
1069 mutex_enter(&stmf_state.stmf_lock);
1070 if (cmd == STMF_IOCTL_ADD_VIEW_ENTRY) {
1071 ret = stmf_add_ve(ve->ve_host_group.name,
1072 ve->ve_host_group.name_size,
1073 ve->ve_target_group.name,
1074 ve->ve_target_group.name_size,
1075 ve->ve_guid,
1076 &veid,
1077 ve->ve_lu_nbr,
1078 &iocd->stmf_error);
1079 } else { /* STMF_IOCTL_VALIDATE_VIEW */
1080 ret = stmf_validate_lun_ve(ve->ve_host_group.name,
1081 ve->ve_host_group.name_size,
1082 ve->ve_target_group.name,
1083 ve->ve_target_group.name_size,
1084 ve->ve_lu_nbr,
1085 &iocd->stmf_error);
1086 }
1087 mutex_exit(&stmf_state.stmf_lock);
1088 if (ret == 0 &&
1089 (!ve->ve_ndx_valid || !ve->ve_lu_number_valid) &&
1090 iocd->stmf_obuf_size >= sizeof (stmf_view_op_entry_t)) {
1091 stmf_view_op_entry_t *ve_ret =
1092 (stmf_view_op_entry_t *)obuf;
1093 iocd->stmf_obuf_nentries = 1;
1094 iocd->stmf_obuf_max_nentries = 1;
1095 if (!ve->ve_ndx_valid) {
1096 ve_ret->ve_ndx = veid;
1097 ve_ret->ve_ndx_valid = 1;
1098 }
1099 if (!ve->ve_lu_number_valid) {
1100 ve_ret->ve_lu_number_valid = 1;
1101 bcopy(ve->ve_lu_nbr, ve_ret->ve_lu_nbr, 8);
1102 }
1103 }
1104 break;
1105 case STMF_IOCTL_REMOVE_VIEW_ENTRY:
1106 if (stmf_state.stmf_config_state == STMF_CONFIG_NONE) {
1107 ret = EACCES;
1108 iocd->stmf_error = STMF_IOCERR_UPDATE_NEED_CFG_INIT;
1109 break;
1110 }
1111 ve = (stmf_view_op_entry_t *)ibuf;
1112 if ((ibuf == NULL) ||
1113 (iocd->stmf_ibuf_size < sizeof (stmf_view_op_entry_t))) {
1114 ret = EINVAL;
1115 break;
1116 }
1117 if (!ve->ve_ndx_valid) {
1118 ret = EINVAL;
1119 break;
1120 }
1121 mutex_enter(&stmf_state.stmf_lock);
1122 ret = stmf_remove_ve_by_id(ve->ve_guid, ve->ve_ndx,
1123 &iocd->stmf_error);
1124 mutex_exit(&stmf_state.stmf_lock);
1125 break;
1126 case STMF_IOCTL_GET_HG_LIST:
1127 id_list = &stmf_state.stmf_hg_list;
1128 /* FALLTHROUGH */
1129 case STMF_IOCTL_GET_TG_LIST:
1130 if (cmd == STMF_IOCTL_GET_TG_LIST)
1131 id_list = &stmf_state.stmf_tg_list;
1132 mutex_enter(&stmf_state.stmf_lock);
1133 iocd->stmf_obuf_max_nentries = id_list->id_count;
1134 n = min(id_list->id_count,
1135 (iocd->stmf_obuf_size)/sizeof (stmf_group_name_t));
1136 iocd->stmf_obuf_nentries = n;
1137 id_entry = id_list->idl_head;
1138 grpname = (stmf_group_name_t *)obuf;
1139 for (i = 0; i < n; i++) {
1140 if (id_entry->id_data[0] == '*') {
1141 if (iocd->stmf_obuf_nentries > 0) {
1142 iocd->stmf_obuf_nentries--;
1143 }
1144 id_entry = id_entry->id_next;
1145 continue;
1146 }
1147 grpname->name_size = id_entry->id_data_size;
1148 bcopy(id_entry->id_data, grpname->name,
1149 id_entry->id_data_size);
1150 grpname++;
1151 id_entry = id_entry->id_next;
1152 }
1153 mutex_exit(&stmf_state.stmf_lock);
1154 break;
1155 case STMF_IOCTL_GET_HG_ENTRIES:
1156 id_list = &stmf_state.stmf_hg_list;
1157 /* FALLTHROUGH */
1158 case STMF_IOCTL_GET_TG_ENTRIES:
1159 grpname = (stmf_group_name_t *)ibuf;
1160 if ((ibuf == NULL) ||
1161 (iocd->stmf_ibuf_size < sizeof (stmf_group_name_t))) {
1162 ret = EINVAL;
1163 break;
1164 }
1165 if (cmd == STMF_IOCTL_GET_TG_ENTRIES) {
1166 id_list = &stmf_state.stmf_tg_list;
1167 }
1168 mutex_enter(&stmf_state.stmf_lock);
1169 id_entry = stmf_lookup_id(id_list, grpname->name_size,
1170 grpname->name);
1171 if (!id_entry)
1172 ret = ENODEV;
1173 else {
1174 stmf_ge_ident_t *grp_entry;
1175 id_list = (stmf_id_list_t *)id_entry->id_impl_specific;
1176 iocd->stmf_obuf_max_nentries = id_list->id_count;
1177 n = min(id_list->id_count,
1178 iocd->stmf_obuf_size/sizeof (stmf_ge_ident_t));
1179 iocd->stmf_obuf_nentries = n;
1180 id_entry = id_list->idl_head;
1181 grp_entry = (stmf_ge_ident_t *)obuf;
1182 for (i = 0; i < n; i++) {
1183 bcopy(id_entry->id_data, grp_entry->ident,
1184 id_entry->id_data_size);
1185 grp_entry->ident_size = id_entry->id_data_size;
1186 id_entry = id_entry->id_next;
1187 grp_entry++;
1188 }
1189 }
1190 mutex_exit(&stmf_state.stmf_lock);
1191 break;
1192
1193 case STMF_IOCTL_GET_VE_LIST:
1194 n = iocd->stmf_obuf_size/sizeof (stmf_view_op_entry_t);
1195 mutex_enter(&stmf_state.stmf_lock);
1196 ve = (stmf_view_op_entry_t *)obuf;
1197 for (id_entry = stmf_state.stmf_luid_list.idl_head;
1198 id_entry; id_entry = id_entry->id_next) {
1199 for (view_entry = (stmf_view_entry_t *)
1200 id_entry->id_impl_specific; view_entry;
1201 view_entry = view_entry->ve_next) {
1202 iocd->stmf_obuf_max_nentries++;
1203 if (iocd->stmf_obuf_nentries >= n)
1204 continue;
1205 ve->ve_ndx_valid = 1;
1206 ve->ve_ndx = view_entry->ve_id;
1207 ve->ve_lu_number_valid = 1;
1208 bcopy(view_entry->ve_lun, ve->ve_lu_nbr, 8);
1209 bcopy(view_entry->ve_luid->id_data, ve->ve_guid,
1210 view_entry->ve_luid->id_data_size);
1211 if (view_entry->ve_hg->id_data[0] == '*') {
1212 ve->ve_all_hosts = 1;
1213 } else {
1214 bcopy(view_entry->ve_hg->id_data,
1215 ve->ve_host_group.name,
1216 view_entry->ve_hg->id_data_size);
1217 ve->ve_host_group.name_size =
1218 view_entry->ve_hg->id_data_size;
1219 }
1220
1221 if (view_entry->ve_tg->id_data[0] == '*') {
1222 ve->ve_all_targets = 1;
1223 } else {
1224 bcopy(view_entry->ve_tg->id_data,
1225 ve->ve_target_group.name,
1226 view_entry->ve_tg->id_data_size);
1227 ve->ve_target_group.name_size =
1228 view_entry->ve_tg->id_data_size;
1229 }
1230 ve++;
1231 iocd->stmf_obuf_nentries++;
1232 }
1233 }
1234 mutex_exit(&stmf_state.stmf_lock);
1235 break;
1236
1237 case STMF_IOCTL_LU_VE_LIST:
1238 p_id = (uint8_t *)ibuf;
1239 if ((iocd->stmf_ibuf_size != 16) ||
1240 (iocd->stmf_obuf_size < sizeof (stmf_view_op_entry_t))) {
1241 ret = EINVAL;
1242 break;
1243 }
1244
1245 n = iocd->stmf_obuf_size/sizeof (stmf_view_op_entry_t);
1246 mutex_enter(&stmf_state.stmf_lock);
1247 ve = (stmf_view_op_entry_t *)obuf;
1248 for (id_entry = stmf_state.stmf_luid_list.idl_head;
1249 id_entry; id_entry = id_entry->id_next) {
1250 if (bcmp(id_entry->id_data, p_id, 16) != 0)
1251 continue;
1252 for (view_entry = (stmf_view_entry_t *)
1253 id_entry->id_impl_specific; view_entry;
1254 view_entry = view_entry->ve_next) {
1255 iocd->stmf_obuf_max_nentries++;
1256 if (iocd->stmf_obuf_nentries >= n)
1257 continue;
1258 ve->ve_ndx_valid = 1;
1259 ve->ve_ndx = view_entry->ve_id;
1260 ve->ve_lu_number_valid = 1;
1261 bcopy(view_entry->ve_lun, ve->ve_lu_nbr, 8);
1262 bcopy(view_entry->ve_luid->id_data, ve->ve_guid,
1263 view_entry->ve_luid->id_data_size);
1264 if (view_entry->ve_hg->id_data[0] == '*') {
1265 ve->ve_all_hosts = 1;
1266 } else {
1267 bcopy(view_entry->ve_hg->id_data,
1268 ve->ve_host_group.name,
1269 view_entry->ve_hg->id_data_size);
1270 ve->ve_host_group.name_size =
1271 view_entry->ve_hg->id_data_size;
1272 }
1273
1274 if (view_entry->ve_tg->id_data[0] == '*') {
1275 ve->ve_all_targets = 1;
1276 } else {
1277 bcopy(view_entry->ve_tg->id_data,
1278 ve->ve_target_group.name,
1279 view_entry->ve_tg->id_data_size);
1280 ve->ve_target_group.name_size =
1281 view_entry->ve_tg->id_data_size;
1282 }
1283 ve++;
1284 iocd->stmf_obuf_nentries++;
1285 }
1286 break;
1287 }
1288 mutex_exit(&stmf_state.stmf_lock);
1289 break;
1290
1291 case STMF_IOCTL_LOAD_PP_DATA:
1292 if (stmf_state.stmf_config_state == STMF_CONFIG_NONE) {
1293 ret = EACCES;
1294 iocd->stmf_error = STMF_IOCERR_UPDATE_NEED_CFG_INIT;
1295 break;
1296 }
1297 ppi = (stmf_ppioctl_data_t *)ibuf;
1298 if ((ppi == NULL) ||
1299 (iocd->stmf_ibuf_size < sizeof (stmf_ppioctl_data_t))) {
1300 ret = EINVAL;
1301 break;
1302 }
1303 /* returned token */
1304 ppi_token = (uint64_t *)obuf;
1305 if ((ppi_token == NULL) ||
1306 (iocd->stmf_obuf_size < sizeof (uint64_t))) {
1307 ret = EINVAL;
1308 break;
1309 }
1310 ret = stmf_load_ppd_ioctl(ppi, ppi_token, &iocd->stmf_error);
1311 break;
1312
1313 case STMF_IOCTL_GET_PP_DATA:
1314 if (stmf_state.stmf_config_state == STMF_CONFIG_NONE) {
1315 ret = EACCES;
1316 iocd->stmf_error = STMF_IOCERR_UPDATE_NEED_CFG_INIT;
1317 break;
1318 }
1319 ppi = (stmf_ppioctl_data_t *)ibuf;
1320 if (ppi == NULL ||
1321 (iocd->stmf_ibuf_size < sizeof (stmf_ppioctl_data_t))) {
1322 ret = EINVAL;
1323 break;
1324 }
1325 ppi_out = (stmf_ppioctl_data_t *)obuf;
1326 if ((ppi_out == NULL) ||
1327 (iocd->stmf_obuf_size < sizeof (stmf_ppioctl_data_t))) {
1328 ret = EINVAL;
1329 break;
1330 }
1331 ret = stmf_get_ppd_ioctl(ppi, ppi_out, &iocd->stmf_error);
1332 break;
1333
1334 case STMF_IOCTL_CLEAR_PP_DATA:
1335 if (stmf_state.stmf_config_state == STMF_CONFIG_NONE) {
1336 ret = EACCES;
1337 iocd->stmf_error = STMF_IOCERR_UPDATE_NEED_CFG_INIT;
1338 break;
1339 }
1340 ppi = (stmf_ppioctl_data_t *)ibuf;
1341 if ((ppi == NULL) ||
1342 (iocd->stmf_ibuf_size < sizeof (stmf_ppioctl_data_t))) {
1343 ret = EINVAL;
1344 break;
1345 }
1346 ret = stmf_delete_ppd_ioctl(ppi);
1347 break;
1348
1349 case STMF_IOCTL_CLEAR_TRACE:
1350 stmf_trace_clear();
1351 break;
1352
1353 case STMF_IOCTL_ADD_TRACE:
1354 if (iocd->stmf_ibuf_size && ibuf) {
1355 ((uint8_t *)ibuf)[iocd->stmf_ibuf_size - 1] = 0;
1356 stmf_trace("\nstradm", "%s\n", ibuf);
1357 }
1358 break;
1359
1360 case STMF_IOCTL_GET_TRACE_POSITION:
1361 if (obuf && (iocd->stmf_obuf_size > 3)) {
1362 mutex_enter(&trace_buf_lock);
1363 *((int *)obuf) = trace_buf_curndx;
1364 mutex_exit(&trace_buf_lock);
1365 } else {
1366 ret = EINVAL;
1367 }
1368 break;
1369
1370 case STMF_IOCTL_GET_TRACE:
1371 if ((iocd->stmf_obuf_size == 0) || (iocd->stmf_ibuf_size < 4)) {
1372 ret = EINVAL;
1373 break;
1374 }
1375 i = *((int *)ibuf);
1376 if ((i > trace_buf_size) || ((i + iocd->stmf_obuf_size) >
1377 trace_buf_size)) {
1378 ret = EINVAL;
1379 break;
1380 }
1381 mutex_enter(&trace_buf_lock);
1382 bcopy(stmf_trace_buf + i, obuf, iocd->stmf_obuf_size);
1383 mutex_exit(&trace_buf_lock);
1384 break;
1385
1386 default:
1387 ret = ENOTTY;
1388 }
1389
1390 if (ret == 0) {
1391 ret = stmf_copyout_iocdata(data, mode, iocd, obuf);
1392 } else if (iocd->stmf_error) {
1393 (void) stmf_copyout_iocdata(data, mode, iocd, obuf);
1394 }
1395 if (obuf) {
1396 kmem_free(obuf, iocd->stmf_obuf_size);
1397 obuf = NULL;
1398 }
1399 if (ibuf) {
1400 kmem_free(ibuf, iocd->stmf_ibuf_size);
1401 ibuf = NULL;
1402 }
1403 kmem_free(iocd, sizeof (stmf_iocdata_t));
1404 return (ret);
1405 }
1406
1407 static int
stmf_get_service_state()1408 stmf_get_service_state()
1409 {
1410 stmf_i_local_port_t *ilport;
1411 stmf_i_lu_t *ilu;
1412 int online = 0;
1413 int offline = 0;
1414 int onlining = 0;
1415 int offlining = 0;
1416
1417 ASSERT(mutex_owned(&stmf_state.stmf_lock));
1418 for (ilport = stmf_state.stmf_ilportlist; ilport != NULL;
1419 ilport = ilport->ilport_next) {
1420 if (ilport->ilport_state == STMF_STATE_OFFLINE)
1421 offline++;
1422 else if (ilport->ilport_state == STMF_STATE_ONLINE)
1423 online++;
1424 else if (ilport->ilport_state == STMF_STATE_ONLINING)
1425 onlining++;
1426 else if (ilport->ilport_state == STMF_STATE_OFFLINING)
1427 offlining++;
1428 }
1429
1430 for (ilu = stmf_state.stmf_ilulist; ilu != NULL;
1431 ilu = ilu->ilu_next) {
1432 if (ilu->ilu_state == STMF_STATE_OFFLINE)
1433 offline++;
1434 else if (ilu->ilu_state == STMF_STATE_ONLINE)
1435 online++;
1436 else if (ilu->ilu_state == STMF_STATE_ONLINING)
1437 onlining++;
1438 else if (ilu->ilu_state == STMF_STATE_OFFLINING)
1439 offlining++;
1440 }
1441
1442 if (stmf_state.stmf_service_running) {
1443 if (onlining)
1444 return (STMF_STATE_ONLINING);
1445 else
1446 return (STMF_STATE_ONLINE);
1447 }
1448
1449 if (offlining) {
1450 return (STMF_STATE_OFFLINING);
1451 }
1452
1453 return (STMF_STATE_OFFLINE);
1454 }
1455
1456 static int
stmf_set_stmf_state(stmf_state_desc_t * std)1457 stmf_set_stmf_state(stmf_state_desc_t *std)
1458 {
1459 stmf_i_local_port_t *ilport;
1460 stmf_i_lu_t *ilu;
1461 stmf_state_change_info_t ssi;
1462 int svc_state;
1463
1464 ssi.st_rflags = STMF_RFLAG_USER_REQUEST;
1465 ssi.st_additional_info = NULL;
1466
1467 mutex_enter(&stmf_state.stmf_lock);
1468 if (!stmf_state.stmf_exclusive_open) {
1469 mutex_exit(&stmf_state.stmf_lock);
1470 return (EACCES);
1471 }
1472
1473 if (stmf_state.stmf_inventory_locked) {
1474 mutex_exit(&stmf_state.stmf_lock);
1475 return (EBUSY);
1476 }
1477
1478 if ((std->state != STMF_STATE_ONLINE) &&
1479 (std->state != STMF_STATE_OFFLINE)) {
1480 mutex_exit(&stmf_state.stmf_lock);
1481 return (EINVAL);
1482 }
1483
1484 svc_state = stmf_get_service_state();
1485 if ((svc_state == STMF_STATE_OFFLINING) ||
1486 (svc_state == STMF_STATE_ONLINING)) {
1487 mutex_exit(&stmf_state.stmf_lock);
1488 return (EBUSY);
1489 }
1490
1491 if (svc_state == STMF_STATE_OFFLINE) {
1492 if (std->config_state == STMF_CONFIG_INIT) {
1493 if (std->state != STMF_STATE_OFFLINE) {
1494 mutex_exit(&stmf_state.stmf_lock);
1495 return (EINVAL);
1496 }
1497 stmf_state.stmf_config_state = STMF_CONFIG_INIT;
1498 stmf_delete_all_ppds();
1499 stmf_view_clear_config();
1500 stmf_view_init();
1501 mutex_exit(&stmf_state.stmf_lock);
1502 return (0);
1503 }
1504 if ((stmf_state.stmf_config_state == STMF_CONFIG_INIT) ||
1505 (stmf_state.stmf_config_state == STMF_CONFIG_NONE)) {
1506 if (std->config_state != STMF_CONFIG_INIT_DONE) {
1507 mutex_exit(&stmf_state.stmf_lock);
1508 return (EINVAL);
1509 }
1510 stmf_state.stmf_config_state = STMF_CONFIG_INIT_DONE;
1511 }
1512 if (std->state == STMF_STATE_OFFLINE) {
1513 mutex_exit(&stmf_state.stmf_lock);
1514 return (0);
1515 }
1516 if (stmf_state.stmf_config_state == STMF_CONFIG_INIT) {
1517 mutex_exit(&stmf_state.stmf_lock);
1518 return (EINVAL);
1519 }
1520 stmf_state.stmf_inventory_locked = 1;
1521 stmf_state.stmf_service_running = 1;
1522 mutex_exit(&stmf_state.stmf_lock);
1523
1524 for (ilport = stmf_state.stmf_ilportlist; ilport != NULL;
1525 ilport = ilport->ilport_next) {
1526 if (stmf_state.stmf_default_lport_state !=
1527 STMF_STATE_ONLINE)
1528 continue;
1529 (void) stmf_ctl(STMF_CMD_LPORT_ONLINE,
1530 ilport->ilport_lport, &ssi);
1531 }
1532
1533 for (ilu = stmf_state.stmf_ilulist; ilu != NULL;
1534 ilu = ilu->ilu_next) {
1535 if (stmf_state.stmf_default_lu_state !=
1536 STMF_STATE_ONLINE)
1537 continue;
1538 (void) stmf_ctl(STMF_CMD_LU_ONLINE, ilu->ilu_lu, &ssi);
1539 }
1540 mutex_enter(&stmf_state.stmf_lock);
1541 stmf_state.stmf_inventory_locked = 0;
1542 mutex_exit(&stmf_state.stmf_lock);
1543 return (0);
1544 }
1545
1546 /* svc_state is STMF_STATE_ONLINE here */
1547 if ((std->state != STMF_STATE_OFFLINE) ||
1548 (std->config_state == STMF_CONFIG_INIT)) {
1549 mutex_exit(&stmf_state.stmf_lock);
1550 return (EACCES);
1551 }
1552
1553 stmf_state.stmf_inventory_locked = 1;
1554 stmf_state.stmf_service_running = 0;
1555
1556 mutex_exit(&stmf_state.stmf_lock);
1557 for (ilport = stmf_state.stmf_ilportlist; ilport != NULL;
1558 ilport = ilport->ilport_next) {
1559 if (ilport->ilport_state != STMF_STATE_ONLINE)
1560 continue;
1561 (void) stmf_ctl(STMF_CMD_LPORT_OFFLINE,
1562 ilport->ilport_lport, &ssi);
1563 }
1564
1565 for (ilu = stmf_state.stmf_ilulist; ilu != NULL;
1566 ilu = ilu->ilu_next) {
1567 if (ilu->ilu_state != STMF_STATE_ONLINE)
1568 continue;
1569 (void) stmf_ctl(STMF_CMD_LU_OFFLINE, ilu->ilu_lu, &ssi);
1570 }
1571 mutex_enter(&stmf_state.stmf_lock);
1572 stmf_state.stmf_inventory_locked = 0;
1573 mutex_exit(&stmf_state.stmf_lock);
1574 return (0);
1575 }
1576
1577 static int
stmf_get_stmf_state(stmf_state_desc_t * std)1578 stmf_get_stmf_state(stmf_state_desc_t *std)
1579 {
1580 mutex_enter(&stmf_state.stmf_lock);
1581 std->state = stmf_get_service_state();
1582 std->config_state = stmf_state.stmf_config_state;
1583 mutex_exit(&stmf_state.stmf_lock);
1584
1585 return (0);
1586 }
1587
1588 /*
1589 * handles registration message from pppt for a logical unit
1590 */
1591 stmf_status_t
stmf_ic_lu_reg(stmf_ic_reg_dereg_lun_msg_t * msg,uint32_t type)1592 stmf_ic_lu_reg(stmf_ic_reg_dereg_lun_msg_t *msg, uint32_t type)
1593 {
1594 stmf_i_lu_provider_t *ilp;
1595 stmf_lu_provider_t *lp;
1596 mutex_enter(&stmf_state.stmf_lock);
1597 for (ilp = stmf_state.stmf_ilplist; ilp != NULL; ilp = ilp->ilp_next) {
1598 if (strcmp(msg->icrl_lu_provider_name,
1599 ilp->ilp_lp->lp_name) == 0) {
1600 lp = ilp->ilp_lp;
1601 mutex_exit(&stmf_state.stmf_lock);
1602 lp->lp_proxy_msg(msg->icrl_lun_id, msg->icrl_cb_arg,
1603 msg->icrl_cb_arg_len, type);
1604 return (STMF_SUCCESS);
1605 }
1606 }
1607 mutex_exit(&stmf_state.stmf_lock);
1608 return (STMF_SUCCESS);
1609 }
1610
1611 /*
1612 * handles de-registration message from pppt for a logical unit
1613 */
1614 stmf_status_t
stmf_ic_lu_dereg(stmf_ic_reg_dereg_lun_msg_t * msg)1615 stmf_ic_lu_dereg(stmf_ic_reg_dereg_lun_msg_t *msg)
1616 {
1617 stmf_i_lu_provider_t *ilp;
1618 stmf_lu_provider_t *lp;
1619 mutex_enter(&stmf_state.stmf_lock);
1620 for (ilp = stmf_state.stmf_ilplist; ilp != NULL; ilp = ilp->ilp_next) {
1621 if (strcmp(msg->icrl_lu_provider_name,
1622 ilp->ilp_lp->lp_name) == 0) {
1623 lp = ilp->ilp_lp;
1624 mutex_exit(&stmf_state.stmf_lock);
1625 lp->lp_proxy_msg(msg->icrl_lun_id, NULL, 0,
1626 STMF_MSG_LU_DEREGISTER);
1627 return (STMF_SUCCESS);
1628 }
1629 }
1630 mutex_exit(&stmf_state.stmf_lock);
1631 return (STMF_SUCCESS);
1632 }
1633
1634 /*
1635 * helper function to find a task that matches a task_msgid
1636 */
1637 scsi_task_t *
find_task_from_msgid(uint8_t * lu_id,stmf_ic_msgid_t task_msgid)1638 find_task_from_msgid(uint8_t *lu_id, stmf_ic_msgid_t task_msgid)
1639 {
1640 stmf_i_lu_t *ilu;
1641 stmf_i_scsi_task_t *itask;
1642
1643 mutex_enter(&stmf_state.stmf_lock);
1644 for (ilu = stmf_state.stmf_ilulist; ilu != NULL; ilu = ilu->ilu_next) {
1645 if (bcmp(lu_id, ilu->ilu_lu->lu_id->ident, 16) == 0) {
1646 break;
1647 }
1648 }
1649
1650 if (ilu == NULL) {
1651 mutex_exit(&stmf_state.stmf_lock);
1652 return (NULL);
1653 }
1654
1655 mutex_enter(&ilu->ilu_task_lock);
1656 for (itask = ilu->ilu_tasks; itask != NULL;
1657 itask = itask->itask_lu_next) {
1658 if (itask->itask_flags & (ITASK_IN_FREE_LIST |
1659 ITASK_BEING_ABORTED)) {
1660 continue;
1661 }
1662 if (itask->itask_proxy_msg_id == task_msgid) {
1663 break;
1664 }
1665 }
1666 mutex_exit(&ilu->ilu_task_lock);
1667 mutex_exit(&stmf_state.stmf_lock);
1668
1669 if (itask != NULL) {
1670 return (itask->itask_task);
1671 } else {
1672 /* task not found. Likely already aborted. */
1673 return (NULL);
1674 }
1675 }
1676
1677 /*
1678 * message received from pppt/ic
1679 */
1680 stmf_status_t
stmf_msg_rx(stmf_ic_msg_t * msg)1681 stmf_msg_rx(stmf_ic_msg_t *msg)
1682 {
1683 mutex_enter(&stmf_state.stmf_lock);
1684 if (stmf_state.stmf_alua_state != 1) {
1685 mutex_exit(&stmf_state.stmf_lock);
1686 cmn_err(CE_WARN, "stmf alua state is disabled");
1687 ic_msg_free(msg);
1688 return (STMF_FAILURE);
1689 }
1690 mutex_exit(&stmf_state.stmf_lock);
1691
1692 switch (msg->icm_msg_type) {
1693 case STMF_ICM_REGISTER_LUN:
1694 (void) stmf_ic_lu_reg(
1695 (stmf_ic_reg_dereg_lun_msg_t *)msg->icm_msg,
1696 STMF_MSG_LU_REGISTER);
1697 break;
1698 case STMF_ICM_LUN_ACTIVE:
1699 (void) stmf_ic_lu_reg(
1700 (stmf_ic_reg_dereg_lun_msg_t *)msg->icm_msg,
1701 STMF_MSG_LU_ACTIVE);
1702 break;
1703 case STMF_ICM_DEREGISTER_LUN:
1704 (void) stmf_ic_lu_dereg(
1705 (stmf_ic_reg_dereg_lun_msg_t *)msg->icm_msg);
1706 break;
1707 case STMF_ICM_SCSI_DATA:
1708 (void) stmf_ic_rx_scsi_data(
1709 (stmf_ic_scsi_data_msg_t *)msg->icm_msg);
1710 break;
1711 case STMF_ICM_SCSI_STATUS:
1712 (void) stmf_ic_rx_scsi_status(
1713 (stmf_ic_scsi_status_msg_t *)msg->icm_msg);
1714 break;
1715 case STMF_ICM_STATUS:
1716 (void) stmf_ic_rx_status(
1717 (stmf_ic_status_msg_t *)msg->icm_msg);
1718 break;
1719 default:
1720 cmn_err(CE_WARN, "unknown message received %d",
1721 msg->icm_msg_type);
1722 ic_msg_free(msg);
1723 return (STMF_FAILURE);
1724 }
1725 ic_msg_free(msg);
1726 return (STMF_SUCCESS);
1727 }
1728
1729 stmf_status_t
stmf_ic_rx_status(stmf_ic_status_msg_t * msg)1730 stmf_ic_rx_status(stmf_ic_status_msg_t *msg)
1731 {
1732 stmf_i_local_port_t *ilport;
1733
1734 if (msg->ics_msg_type != STMF_ICM_REGISTER_PROXY_PORT) {
1735 /* for now, ignore other message status */
1736 return (STMF_SUCCESS);
1737 }
1738
1739 if (msg->ics_status != STMF_SUCCESS) {
1740 return (STMF_SUCCESS);
1741 }
1742
1743 mutex_enter(&stmf_state.stmf_lock);
1744 for (ilport = stmf_state.stmf_ilportlist; ilport != NULL;
1745 ilport = ilport->ilport_next) {
1746 if (msg->ics_msgid == ilport->ilport_reg_msgid) {
1747 ilport->ilport_proxy_registered = 1;
1748 break;
1749 }
1750 }
1751 mutex_exit(&stmf_state.stmf_lock);
1752 return (STMF_SUCCESS);
1753 }
1754
1755 /*
1756 * handles scsi status message from pppt
1757 */
1758 stmf_status_t
stmf_ic_rx_scsi_status(stmf_ic_scsi_status_msg_t * msg)1759 stmf_ic_rx_scsi_status(stmf_ic_scsi_status_msg_t *msg)
1760 {
1761 scsi_task_t *task;
1762
1763 /* is this a task management command */
1764 if (msg->icss_task_msgid & MSG_ID_TM_BIT) {
1765 return (STMF_SUCCESS);
1766 }
1767
1768 task = find_task_from_msgid(msg->icss_lun_id, msg->icss_task_msgid);
1769
1770 if (task == NULL) {
1771 return (STMF_SUCCESS);
1772 }
1773
1774 task->task_scsi_status = msg->icss_status;
1775 task->task_sense_data = msg->icss_sense;
1776 task->task_sense_length = msg->icss_sense_len;
1777 (void) stmf_send_scsi_status(task, STMF_IOF_LU_DONE);
1778
1779 return (STMF_SUCCESS);
1780 }
1781
1782 /*
1783 * handles scsi data message from pppt
1784 */
1785 stmf_status_t
stmf_ic_rx_scsi_data(stmf_ic_scsi_data_msg_t * msg)1786 stmf_ic_rx_scsi_data(stmf_ic_scsi_data_msg_t *msg)
1787 {
1788 stmf_i_scsi_task_t *itask;
1789 scsi_task_t *task;
1790 stmf_xfer_data_t *xd = NULL;
1791 stmf_data_buf_t *dbuf;
1792 uint32_t sz, minsz, xd_sz, asz;
1793
1794 /* is this a task management command */
1795 if (msg->icsd_task_msgid & MSG_ID_TM_BIT) {
1796 return (STMF_SUCCESS);
1797 }
1798
1799 task = find_task_from_msgid(msg->icsd_lun_id, msg->icsd_task_msgid);
1800 if (task == NULL) {
1801 stmf_ic_msg_t *ic_xfer_done_msg = NULL;
1802 static uint64_t data_msg_id;
1803 stmf_status_t ic_ret = STMF_FAILURE;
1804 mutex_enter(&stmf_state.stmf_lock);
1805 data_msg_id = stmf_proxy_msg_id++;
1806 mutex_exit(&stmf_state.stmf_lock);
1807 /*
1808 * send xfer done status to pppt
1809 * for now, set the session id to 0 as we cannot
1810 * ascertain it since we cannot find the task
1811 */
1812 ic_xfer_done_msg = ic_scsi_data_xfer_done_msg_alloc(
1813 msg->icsd_task_msgid, 0, STMF_FAILURE, data_msg_id);
1814 if (ic_xfer_done_msg) {
1815 ic_ret = ic_tx_msg(ic_xfer_done_msg);
1816 if (ic_ret != STMF_IC_MSG_SUCCESS) {
1817 cmn_err(CE_WARN, "unable to xmit proxy msg");
1818 }
1819 }
1820 return (STMF_FAILURE);
1821 }
1822
1823 itask = (stmf_i_scsi_task_t *)task->task_stmf_private;
1824 dbuf = itask->itask_proxy_dbuf;
1825
1826 task->task_cmd_xfer_length += msg->icsd_data_len;
1827
1828 if (task->task_additional_flags &
1829 TASK_AF_NO_EXPECTED_XFER_LENGTH) {
1830 task->task_expected_xfer_length =
1831 task->task_cmd_xfer_length;
1832 }
1833
1834 sz = min(task->task_expected_xfer_length,
1835 task->task_cmd_xfer_length);
1836
1837 xd_sz = msg->icsd_data_len;
1838 asz = xd_sz + sizeof (*xd) - 4;
1839 xd = (stmf_xfer_data_t *)kmem_zalloc(asz, KM_NOSLEEP);
1840
1841 if (xd == NULL) {
1842 stmf_abort(STMF_QUEUE_TASK_ABORT, task,
1843 STMF_ALLOC_FAILURE, NULL);
1844 return (STMF_FAILURE);
1845 }
1846
1847 xd->alloc_size = asz;
1848 xd->size_left = xd_sz;
1849 bcopy(msg->icsd_data, xd->buf, xd_sz);
1850
1851 sz = min(sz, xd->size_left);
1852 xd->size_left = sz;
1853 minsz = min(512, sz);
1854
1855 if (dbuf == NULL)
1856 dbuf = stmf_alloc_dbuf(task, sz, &minsz, 0);
1857 if (dbuf == NULL) {
1858 kmem_free(xd, xd->alloc_size);
1859 stmf_abort(STMF_QUEUE_TASK_ABORT, task,
1860 STMF_ALLOC_FAILURE, NULL);
1861 return (STMF_FAILURE);
1862 }
1863 dbuf->db_lu_private = xd;
1864 dbuf->db_relative_offset = task->task_nbytes_transferred;
1865 stmf_xd_to_dbuf(dbuf, 0);
1866
1867 dbuf->db_flags = DB_DIRECTION_TO_RPORT;
1868 (void) stmf_xfer_data(task, dbuf, 0);
1869 return (STMF_SUCCESS);
1870 }
1871
1872 stmf_status_t
stmf_proxy_scsi_cmd(scsi_task_t * task,stmf_data_buf_t * dbuf)1873 stmf_proxy_scsi_cmd(scsi_task_t *task, stmf_data_buf_t *dbuf)
1874 {
1875 stmf_i_scsi_task_t *itask =
1876 (stmf_i_scsi_task_t *)task->task_stmf_private;
1877 stmf_i_local_port_t *ilport =
1878 (stmf_i_local_port_t *)task->task_lport->lport_stmf_private;
1879 stmf_ic_msg_t *ic_cmd_msg;
1880 stmf_ic_msg_status_t ic_ret;
1881 stmf_status_t ret = STMF_FAILURE;
1882
1883 if (stmf_state.stmf_alua_state != 1) {
1884 cmn_err(CE_WARN, "stmf alua state is disabled");
1885 return (STMF_FAILURE);
1886 }
1887
1888 if (ilport->ilport_proxy_registered == 0) {
1889 return (STMF_FAILURE);
1890 }
1891
1892 mutex_enter(&stmf_state.stmf_lock);
1893 itask->itask_proxy_msg_id = stmf_proxy_msg_id++;
1894 mutex_exit(&stmf_state.stmf_lock);
1895 itask->itask_proxy_dbuf = dbuf;
1896
1897 /*
1898 * stmf will now take over the task handling for this task
1899 * but it still needs to be treated differently from other
1900 * default handled tasks, hence the ITASK_PROXY_TASK.
1901 * If this is a task management function, we're really just
1902 * duping the command to the peer. Set the TM bit so that
1903 * we can recognize this on return since we won't be completing
1904 * the proxied task in that case.
1905 */
1906 if (task->task_mgmt_function) {
1907 itask->itask_proxy_msg_id |= MSG_ID_TM_BIT;
1908 } else {
1909 uint32_t new, old;
1910 do {
1911 new = old = itask->itask_flags;
1912 if (new & ITASK_BEING_ABORTED)
1913 return (STMF_FAILURE);
1914 new |= ITASK_DEFAULT_HANDLING | ITASK_PROXY_TASK;
1915 } while (atomic_cas_32(&itask->itask_flags, old, new) != old);
1916 }
1917 if (dbuf) {
1918 ic_cmd_msg = ic_scsi_cmd_msg_alloc(itask->itask_proxy_msg_id,
1919 task, dbuf->db_data_size, dbuf->db_sglist[0].seg_addr,
1920 itask->itask_proxy_msg_id);
1921 } else {
1922 ic_cmd_msg = ic_scsi_cmd_msg_alloc(itask->itask_proxy_msg_id,
1923 task, 0, NULL, itask->itask_proxy_msg_id);
1924 }
1925 if (ic_cmd_msg) {
1926 ic_ret = ic_tx_msg(ic_cmd_msg);
1927 if (ic_ret == STMF_IC_MSG_SUCCESS) {
1928 ret = STMF_SUCCESS;
1929 }
1930 }
1931 return (ret);
1932 }
1933
1934
1935 stmf_status_t
pppt_modload()1936 pppt_modload()
1937 {
1938 int error;
1939
1940 if (pppt_mod == NULL && ((pppt_mod =
1941 ddi_modopen("drv/pppt", KRTLD_MODE_FIRST, &error)) == NULL)) {
1942 cmn_err(CE_WARN, "Unable to load pppt");
1943 return (STMF_FAILURE);
1944 }
1945
1946 if (ic_reg_port_msg_alloc == NULL && ((ic_reg_port_msg_alloc =
1947 (stmf_ic_reg_port_msg_alloc_func_t)
1948 ddi_modsym(pppt_mod, "stmf_ic_reg_port_msg_alloc",
1949 &error)) == NULL)) {
1950 cmn_err(CE_WARN,
1951 "Unable to find symbol - stmf_ic_reg_port_msg_alloc");
1952 return (STMF_FAILURE);
1953 }
1954
1955
1956 if (ic_dereg_port_msg_alloc == NULL && ((ic_dereg_port_msg_alloc =
1957 (stmf_ic_dereg_port_msg_alloc_func_t)
1958 ddi_modsym(pppt_mod, "stmf_ic_dereg_port_msg_alloc",
1959 &error)) == NULL)) {
1960 cmn_err(CE_WARN,
1961 "Unable to find symbol - stmf_ic_dereg_port_msg_alloc");
1962 return (STMF_FAILURE);
1963 }
1964
1965 if (ic_reg_lun_msg_alloc == NULL && ((ic_reg_lun_msg_alloc =
1966 (stmf_ic_reg_lun_msg_alloc_func_t)
1967 ddi_modsym(pppt_mod, "stmf_ic_reg_lun_msg_alloc",
1968 &error)) == NULL)) {
1969 cmn_err(CE_WARN,
1970 "Unable to find symbol - stmf_ic_reg_lun_msg_alloc");
1971 return (STMF_FAILURE);
1972 }
1973
1974 if (ic_lun_active_msg_alloc == NULL && ((ic_lun_active_msg_alloc =
1975 (stmf_ic_lun_active_msg_alloc_func_t)
1976 ddi_modsym(pppt_mod, "stmf_ic_lun_active_msg_alloc",
1977 &error)) == NULL)) {
1978 cmn_err(CE_WARN,
1979 "Unable to find symbol - stmf_ic_lun_active_msg_alloc");
1980 return (STMF_FAILURE);
1981 }
1982
1983 if (ic_dereg_lun_msg_alloc == NULL && ((ic_dereg_lun_msg_alloc =
1984 (stmf_ic_dereg_lun_msg_alloc_func_t)
1985 ddi_modsym(pppt_mod, "stmf_ic_dereg_lun_msg_alloc",
1986 &error)) == NULL)) {
1987 cmn_err(CE_WARN,
1988 "Unable to find symbol - stmf_ic_dereg_lun_msg_alloc");
1989 return (STMF_FAILURE);
1990 }
1991
1992 if (ic_scsi_cmd_msg_alloc == NULL && ((ic_scsi_cmd_msg_alloc =
1993 (stmf_ic_scsi_cmd_msg_alloc_func_t)
1994 ddi_modsym(pppt_mod, "stmf_ic_scsi_cmd_msg_alloc",
1995 &error)) == NULL)) {
1996 cmn_err(CE_WARN,
1997 "Unable to find symbol - stmf_ic_scsi_cmd_msg_alloc");
1998 return (STMF_FAILURE);
1999 }
2000
2001 if (ic_scsi_data_xfer_done_msg_alloc == NULL &&
2002 ((ic_scsi_data_xfer_done_msg_alloc =
2003 (stmf_ic_scsi_data_xfer_done_msg_alloc_func_t)
2004 ddi_modsym(pppt_mod, "stmf_ic_scsi_data_xfer_done_msg_alloc",
2005 &error)) == NULL)) {
2006 cmn_err(CE_WARN,
2007 "Unable to find symbol -"
2008 "stmf_ic_scsi_data_xfer_done_msg_alloc");
2009 return (STMF_FAILURE);
2010 }
2011
2012 if (ic_session_reg_msg_alloc == NULL &&
2013 ((ic_session_reg_msg_alloc =
2014 (stmf_ic_session_create_msg_alloc_func_t)
2015 ddi_modsym(pppt_mod, "stmf_ic_session_create_msg_alloc",
2016 &error)) == NULL)) {
2017 cmn_err(CE_WARN,
2018 "Unable to find symbol -"
2019 "stmf_ic_session_create_msg_alloc");
2020 return (STMF_FAILURE);
2021 }
2022
2023 if (ic_session_dereg_msg_alloc == NULL &&
2024 ((ic_session_dereg_msg_alloc =
2025 (stmf_ic_session_destroy_msg_alloc_func_t)
2026 ddi_modsym(pppt_mod, "stmf_ic_session_destroy_msg_alloc",
2027 &error)) == NULL)) {
2028 cmn_err(CE_WARN,
2029 "Unable to find symbol -"
2030 "stmf_ic_session_destroy_msg_alloc");
2031 return (STMF_FAILURE);
2032 }
2033
2034 if (ic_tx_msg == NULL && ((ic_tx_msg =
2035 (stmf_ic_tx_msg_func_t)ddi_modsym(pppt_mod, "stmf_ic_tx_msg",
2036 &error)) == NULL)) {
2037 cmn_err(CE_WARN, "Unable to find symbol - stmf_ic_tx_msg");
2038 return (STMF_FAILURE);
2039 }
2040
2041 if (ic_msg_free == NULL && ((ic_msg_free =
2042 (stmf_ic_msg_free_func_t)ddi_modsym(pppt_mod, "stmf_ic_msg_free",
2043 &error)) == NULL)) {
2044 cmn_err(CE_WARN, "Unable to find symbol - stmf_ic_msg_free");
2045 return (STMF_FAILURE);
2046 }
2047 return (STMF_SUCCESS);
2048 }
2049
2050 static void
stmf_get_alua_state(stmf_alua_state_desc_t * alua_state)2051 stmf_get_alua_state(stmf_alua_state_desc_t *alua_state)
2052 {
2053 mutex_enter(&stmf_state.stmf_lock);
2054 alua_state->alua_node = stmf_state.stmf_alua_node;
2055 alua_state->alua_state = stmf_state.stmf_alua_state;
2056 mutex_exit(&stmf_state.stmf_lock);
2057 }
2058
2059
2060 static int
stmf_set_alua_state(stmf_alua_state_desc_t * alua_state)2061 stmf_set_alua_state(stmf_alua_state_desc_t *alua_state)
2062 {
2063 stmf_i_local_port_t *ilport;
2064 stmf_i_lu_t *ilu;
2065 stmf_lu_t *lu;
2066 stmf_ic_msg_status_t ic_ret;
2067 stmf_ic_msg_t *ic_reg_lun, *ic_reg_port;
2068 stmf_local_port_t *lport;
2069 int ret = 0;
2070
2071 if (alua_state->alua_state > 1 || alua_state->alua_node > 1) {
2072 return (EINVAL);
2073 }
2074
2075 mutex_enter(&stmf_state.stmf_lock);
2076 if (alua_state->alua_state == 1) {
2077 if (pppt_modload() == STMF_FAILURE) {
2078 ret = EIO;
2079 goto err;
2080 }
2081 if (alua_state->alua_node != 0) {
2082 /* reset existing rtpids to new base */
2083 stmf_rtpid_counter = 255;
2084 }
2085 stmf_state.stmf_alua_node = alua_state->alua_node;
2086 stmf_state.stmf_alua_state = 1;
2087 /* register existing local ports with ppp */
2088 for (ilport = stmf_state.stmf_ilportlist; ilport != NULL;
2089 ilport = ilport->ilport_next) {
2090 /* skip standby ports and non-alua participants */
2091 if (ilport->ilport_standby == 1 ||
2092 ilport->ilport_alua == 0) {
2093 continue;
2094 }
2095 if (alua_state->alua_node != 0) {
2096 ilport->ilport_rtpid =
2097 atomic_inc_16_nv(&stmf_rtpid_counter);
2098 }
2099 lport = ilport->ilport_lport;
2100 ic_reg_port = ic_reg_port_msg_alloc(
2101 lport->lport_id, ilport->ilport_rtpid,
2102 0, NULL, stmf_proxy_msg_id);
2103 if (ic_reg_port) {
2104 ic_ret = ic_tx_msg(ic_reg_port);
2105 if (ic_ret == STMF_IC_MSG_SUCCESS) {
2106 ilport->ilport_reg_msgid =
2107 stmf_proxy_msg_id++;
2108 } else {
2109 cmn_err(CE_WARN,
2110 "error on port registration "
2111 "port - %s",
2112 ilport->ilport_kstat_tgt_name);
2113 }
2114 }
2115 }
2116 /* register existing logical units */
2117 for (ilu = stmf_state.stmf_ilulist; ilu != NULL;
2118 ilu = ilu->ilu_next) {
2119 if (ilu->ilu_access != STMF_LU_ACTIVE) {
2120 continue;
2121 }
2122 /* register with proxy module */
2123 lu = ilu->ilu_lu;
2124 if (lu->lu_lp && lu->lu_lp->lp_lpif_rev == LPIF_REV_2 &&
2125 lu->lu_lp->lp_alua_support) {
2126 ilu->ilu_alua = 1;
2127 /* allocate the register message */
2128 ic_reg_lun = ic_reg_lun_msg_alloc(
2129 lu->lu_id->ident, lu->lu_lp->lp_name,
2130 lu->lu_proxy_reg_arg_len,
2131 (uint8_t *)lu->lu_proxy_reg_arg,
2132 stmf_proxy_msg_id);
2133 /* send the message */
2134 if (ic_reg_lun) {
2135 ic_ret = ic_tx_msg(ic_reg_lun);
2136 if (ic_ret == STMF_IC_MSG_SUCCESS) {
2137 stmf_proxy_msg_id++;
2138 }
2139 }
2140 }
2141 }
2142 } else {
2143 stmf_state.stmf_alua_state = 0;
2144 }
2145
2146 err:
2147 mutex_exit(&stmf_state.stmf_lock);
2148 return (ret);
2149 }
2150
2151
2152 typedef struct {
2153 void *bp; /* back pointer from internal struct to main struct */
2154 int alloc_size;
2155 } __istmf_t;
2156
2157 typedef struct {
2158 __istmf_t *fp; /* Framework private */
2159 void *cp; /* Caller private */
2160 void *ss; /* struct specific */
2161 } __stmf_t;
2162
2163 static struct {
2164 int shared;
2165 int fw_private;
2166 } stmf_sizes[] = { { 0, 0 },
2167 { GET_STRUCT_SIZE(stmf_lu_provider_t),
2168 GET_STRUCT_SIZE(stmf_i_lu_provider_t) },
2169 { GET_STRUCT_SIZE(stmf_port_provider_t),
2170 GET_STRUCT_SIZE(stmf_i_port_provider_t) },
2171 { GET_STRUCT_SIZE(stmf_local_port_t),
2172 GET_STRUCT_SIZE(stmf_i_local_port_t) },
2173 { GET_STRUCT_SIZE(stmf_lu_t),
2174 GET_STRUCT_SIZE(stmf_i_lu_t) },
2175 { GET_STRUCT_SIZE(stmf_scsi_session_t),
2176 GET_STRUCT_SIZE(stmf_i_scsi_session_t) },
2177 { GET_STRUCT_SIZE(scsi_task_t),
2178 GET_STRUCT_SIZE(stmf_i_scsi_task_t) },
2179 { GET_STRUCT_SIZE(stmf_data_buf_t),
2180 GET_STRUCT_SIZE(__istmf_t) },
2181 { GET_STRUCT_SIZE(stmf_dbuf_store_t),
2182 GET_STRUCT_SIZE(__istmf_t) }
2183
2184 };
2185
2186 void *
stmf_alloc(stmf_struct_id_t struct_id,int additional_size,int flags)2187 stmf_alloc(stmf_struct_id_t struct_id, int additional_size, int flags)
2188 {
2189 int stmf_size;
2190 int kmem_flag;
2191 __stmf_t *sh;
2192
2193 if ((struct_id == 0) || (struct_id >= STMF_MAX_STRUCT_IDS))
2194 return (NULL);
2195
2196 if ((curthread->t_flag & T_INTR_THREAD) || (flags & AF_FORCE_NOSLEEP)) {
2197 kmem_flag = KM_NOSLEEP;
2198 } else {
2199 kmem_flag = KM_SLEEP;
2200 }
2201
2202 additional_size = (additional_size + 7) & (~7);
2203 stmf_size = stmf_sizes[struct_id].shared +
2204 stmf_sizes[struct_id].fw_private + additional_size;
2205
2206 if (flags & AF_DONTZERO)
2207 sh = (__stmf_t *)kmem_alloc(stmf_size, kmem_flag);
2208 else
2209 sh = (__stmf_t *)kmem_zalloc(stmf_size, kmem_flag);
2210
2211 if (sh == NULL)
2212 return (NULL);
2213
2214 /*
2215 * In principle, the implementation inside stmf_alloc should not
2216 * be changed anyway. But the original order of framework private
2217 * data and caller private data does not support sglist in the caller
2218 * private data.
2219 * To work around this, the memory segments of framework private
2220 * data and caller private data are re-ordered here.
2221 * A better solution is to provide a specific interface to allocate
2222 * the sglist, then we will not need this workaround any more.
2223 * But before the new interface is available, the memory segment
2224 * ordering should be kept as is.
2225 */
2226 sh->cp = GET_BYTE_OFFSET(sh, stmf_sizes[struct_id].shared);
2227 sh->fp = (__istmf_t *)GET_BYTE_OFFSET(sh,
2228 stmf_sizes[struct_id].shared + additional_size);
2229
2230 sh->fp->bp = sh;
2231 /* Just store the total size instead of storing additional size */
2232 sh->fp->alloc_size = stmf_size;
2233
2234 return (sh);
2235 }
2236
2237 void
stmf_free(void * ptr)2238 stmf_free(void *ptr)
2239 {
2240 __stmf_t *sh = (__stmf_t *)ptr;
2241
2242 /*
2243 * So far we dont need any struct specific processing. If such
2244 * a need ever arises, then store the struct id in the framework
2245 * private section and get it here as sh->fp->struct_id.
2246 */
2247 kmem_free(ptr, sh->fp->alloc_size);
2248 }
2249
2250 /*
2251 * Given a pointer to stmf_lu_t, verifies if this lu is registered with the
2252 * framework and returns a pointer to framework private data for the lu.
2253 * Returns NULL if the lu was not found.
2254 */
2255 stmf_i_lu_t *
stmf_lookup_lu(stmf_lu_t * lu)2256 stmf_lookup_lu(stmf_lu_t *lu)
2257 {
2258 stmf_i_lu_t *ilu;
2259 ASSERT(mutex_owned(&stmf_state.stmf_lock));
2260
2261 for (ilu = stmf_state.stmf_ilulist; ilu != NULL; ilu = ilu->ilu_next) {
2262 if (ilu->ilu_lu == lu)
2263 return (ilu);
2264 }
2265 return (NULL);
2266 }
2267
2268 /*
2269 * Given a pointer to stmf_local_port_t, verifies if this lport is registered
2270 * with the framework and returns a pointer to framework private data for
2271 * the lport.
2272 * Returns NULL if the lport was not found.
2273 */
2274 stmf_i_local_port_t *
stmf_lookup_lport(stmf_local_port_t * lport)2275 stmf_lookup_lport(stmf_local_port_t *lport)
2276 {
2277 stmf_i_local_port_t *ilport;
2278 ASSERT(mutex_owned(&stmf_state.stmf_lock));
2279
2280 for (ilport = stmf_state.stmf_ilportlist; ilport != NULL;
2281 ilport = ilport->ilport_next) {
2282 if (ilport->ilport_lport == lport)
2283 return (ilport);
2284 }
2285 return (NULL);
2286 }
2287
2288 stmf_status_t
stmf_register_lu_provider(stmf_lu_provider_t * lp)2289 stmf_register_lu_provider(stmf_lu_provider_t *lp)
2290 {
2291 stmf_i_lu_provider_t *ilp = (stmf_i_lu_provider_t *)lp->lp_stmf_private;
2292 stmf_pp_data_t *ppd;
2293 uint32_t cb_flags;
2294
2295 if (lp->lp_lpif_rev != LPIF_REV_1 && lp->lp_lpif_rev != LPIF_REV_2)
2296 return (STMF_FAILURE);
2297
2298 mutex_enter(&stmf_state.stmf_lock);
2299 ilp->ilp_next = stmf_state.stmf_ilplist;
2300 stmf_state.stmf_ilplist = ilp;
2301 stmf_state.stmf_nlps++;
2302
2303 /* See if we need to do a callback */
2304 for (ppd = stmf_state.stmf_ppdlist; ppd != NULL; ppd = ppd->ppd_next) {
2305 if (strcmp(ppd->ppd_name, lp->lp_name) == 0) {
2306 break;
2307 }
2308 }
2309 if ((ppd == NULL) || (ppd->ppd_nv == NULL)) {
2310 goto rlp_bail_out;
2311 }
2312 ilp->ilp_ppd = ppd;
2313 ppd->ppd_provider = ilp;
2314 if (lp->lp_cb == NULL)
2315 goto rlp_bail_out;
2316 ilp->ilp_cb_in_progress = 1;
2317 cb_flags = STMF_PCB_PREG_COMPLETE;
2318 if (stmf_state.stmf_config_state == STMF_CONFIG_INIT)
2319 cb_flags |= STMF_PCB_STMF_ONLINING;
2320 mutex_exit(&stmf_state.stmf_lock);
2321 lp->lp_cb(lp, STMF_PROVIDER_DATA_UPDATED, ppd->ppd_nv, cb_flags);
2322 mutex_enter(&stmf_state.stmf_lock);
2323 ilp->ilp_cb_in_progress = 0;
2324
2325 rlp_bail_out:
2326 mutex_exit(&stmf_state.stmf_lock);
2327
2328 return (STMF_SUCCESS);
2329 }
2330
2331 stmf_status_t
stmf_deregister_lu_provider(stmf_lu_provider_t * lp)2332 stmf_deregister_lu_provider(stmf_lu_provider_t *lp)
2333 {
2334 stmf_i_lu_provider_t **ppilp;
2335 stmf_i_lu_provider_t *ilp = (stmf_i_lu_provider_t *)lp->lp_stmf_private;
2336
2337 mutex_enter(&stmf_state.stmf_lock);
2338 if (ilp->ilp_nlus || ilp->ilp_cb_in_progress) {
2339 mutex_exit(&stmf_state.stmf_lock);
2340 return (STMF_BUSY);
2341 }
2342 for (ppilp = &stmf_state.stmf_ilplist; *ppilp != NULL;
2343 ppilp = &((*ppilp)->ilp_next)) {
2344 if (*ppilp == ilp) {
2345 *ppilp = ilp->ilp_next;
2346 stmf_state.stmf_nlps--;
2347 if (ilp->ilp_ppd) {
2348 ilp->ilp_ppd->ppd_provider = NULL;
2349 ilp->ilp_ppd = NULL;
2350 }
2351 mutex_exit(&stmf_state.stmf_lock);
2352 return (STMF_SUCCESS);
2353 }
2354 }
2355 mutex_exit(&stmf_state.stmf_lock);
2356 return (STMF_NOT_FOUND);
2357 }
2358
2359 stmf_status_t
stmf_register_port_provider(stmf_port_provider_t * pp)2360 stmf_register_port_provider(stmf_port_provider_t *pp)
2361 {
2362 stmf_i_port_provider_t *ipp =
2363 (stmf_i_port_provider_t *)pp->pp_stmf_private;
2364 stmf_pp_data_t *ppd;
2365 uint32_t cb_flags;
2366
2367 if (pp->pp_portif_rev != PORTIF_REV_1)
2368 return (STMF_FAILURE);
2369
2370 mutex_enter(&stmf_state.stmf_lock);
2371 ipp->ipp_next = stmf_state.stmf_ipplist;
2372 stmf_state.stmf_ipplist = ipp;
2373 stmf_state.stmf_npps++;
2374 /* See if we need to do a callback */
2375 for (ppd = stmf_state.stmf_ppdlist; ppd != NULL; ppd = ppd->ppd_next) {
2376 if (strcmp(ppd->ppd_name, pp->pp_name) == 0) {
2377 break;
2378 }
2379 }
2380 if ((ppd == NULL) || (ppd->ppd_nv == NULL)) {
2381 goto rpp_bail_out;
2382 }
2383 ipp->ipp_ppd = ppd;
2384 ppd->ppd_provider = ipp;
2385 if (pp->pp_cb == NULL)
2386 goto rpp_bail_out;
2387 ipp->ipp_cb_in_progress = 1;
2388 cb_flags = STMF_PCB_PREG_COMPLETE;
2389 if (stmf_state.stmf_config_state == STMF_CONFIG_INIT)
2390 cb_flags |= STMF_PCB_STMF_ONLINING;
2391 mutex_exit(&stmf_state.stmf_lock);
2392 pp->pp_cb(pp, STMF_PROVIDER_DATA_UPDATED, ppd->ppd_nv, cb_flags);
2393 mutex_enter(&stmf_state.stmf_lock);
2394 ipp->ipp_cb_in_progress = 0;
2395
2396 rpp_bail_out:
2397 mutex_exit(&stmf_state.stmf_lock);
2398
2399 return (STMF_SUCCESS);
2400 }
2401
2402 stmf_status_t
stmf_deregister_port_provider(stmf_port_provider_t * pp)2403 stmf_deregister_port_provider(stmf_port_provider_t *pp)
2404 {
2405 stmf_i_port_provider_t *ipp =
2406 (stmf_i_port_provider_t *)pp->pp_stmf_private;
2407 stmf_i_port_provider_t **ppipp;
2408
2409 mutex_enter(&stmf_state.stmf_lock);
2410 if (ipp->ipp_npps || ipp->ipp_cb_in_progress) {
2411 mutex_exit(&stmf_state.stmf_lock);
2412 return (STMF_BUSY);
2413 }
2414 for (ppipp = &stmf_state.stmf_ipplist; *ppipp != NULL;
2415 ppipp = &((*ppipp)->ipp_next)) {
2416 if (*ppipp == ipp) {
2417 *ppipp = ipp->ipp_next;
2418 stmf_state.stmf_npps--;
2419 if (ipp->ipp_ppd) {
2420 ipp->ipp_ppd->ppd_provider = NULL;
2421 ipp->ipp_ppd = NULL;
2422 }
2423 mutex_exit(&stmf_state.stmf_lock);
2424 return (STMF_SUCCESS);
2425 }
2426 }
2427 mutex_exit(&stmf_state.stmf_lock);
2428 return (STMF_NOT_FOUND);
2429 }
2430
2431 int
stmf_load_ppd_ioctl(stmf_ppioctl_data_t * ppi,uint64_t * ppi_token,uint32_t * err_ret)2432 stmf_load_ppd_ioctl(stmf_ppioctl_data_t *ppi, uint64_t *ppi_token,
2433 uint32_t *err_ret)
2434 {
2435 stmf_i_port_provider_t *ipp;
2436 stmf_i_lu_provider_t *ilp;
2437 stmf_pp_data_t *ppd;
2438 nvlist_t *nv;
2439 int s;
2440 int ret;
2441
2442 *err_ret = 0;
2443
2444 if ((ppi->ppi_lu_provider + ppi->ppi_port_provider) != 1) {
2445 return (EINVAL);
2446 }
2447
2448 mutex_enter(&stmf_state.stmf_lock);
2449 for (ppd = stmf_state.stmf_ppdlist; ppd != NULL; ppd = ppd->ppd_next) {
2450 if (ppi->ppi_lu_provider) {
2451 if (!ppd->ppd_lu_provider)
2452 continue;
2453 } else if (ppi->ppi_port_provider) {
2454 if (!ppd->ppd_port_provider)
2455 continue;
2456 }
2457 if (strncmp(ppi->ppi_name, ppd->ppd_name, 254) == 0)
2458 break;
2459 }
2460
2461 if (ppd == NULL) {
2462 /* New provider */
2463 s = strlen(ppi->ppi_name);
2464 if (s > 254) {
2465 mutex_exit(&stmf_state.stmf_lock);
2466 return (EINVAL);
2467 }
2468 s += sizeof (stmf_pp_data_t) - 7;
2469
2470 ppd = kmem_zalloc(s, KM_NOSLEEP);
2471 if (ppd == NULL) {
2472 mutex_exit(&stmf_state.stmf_lock);
2473 return (ENOMEM);
2474 }
2475 ppd->ppd_alloc_size = s;
2476 (void) strcpy(ppd->ppd_name, ppi->ppi_name);
2477
2478 /* See if this provider already exists */
2479 if (ppi->ppi_lu_provider) {
2480 ppd->ppd_lu_provider = 1;
2481 for (ilp = stmf_state.stmf_ilplist; ilp != NULL;
2482 ilp = ilp->ilp_next) {
2483 if (strcmp(ppi->ppi_name,
2484 ilp->ilp_lp->lp_name) == 0) {
2485 ppd->ppd_provider = ilp;
2486 ilp->ilp_ppd = ppd;
2487 break;
2488 }
2489 }
2490 } else {
2491 ppd->ppd_port_provider = 1;
2492 for (ipp = stmf_state.stmf_ipplist; ipp != NULL;
2493 ipp = ipp->ipp_next) {
2494 if (strcmp(ppi->ppi_name,
2495 ipp->ipp_pp->pp_name) == 0) {
2496 ppd->ppd_provider = ipp;
2497 ipp->ipp_ppd = ppd;
2498 break;
2499 }
2500 }
2501 }
2502
2503 /* Link this ppd in */
2504 ppd->ppd_next = stmf_state.stmf_ppdlist;
2505 stmf_state.stmf_ppdlist = ppd;
2506 }
2507
2508 /*
2509 * User is requesting that the token be checked.
2510 * If there was another set after the user's get
2511 * it's an error
2512 */
2513 if (ppi->ppi_token_valid) {
2514 if (ppi->ppi_token != ppd->ppd_token) {
2515 *err_ret = STMF_IOCERR_PPD_UPDATED;
2516 mutex_exit(&stmf_state.stmf_lock);
2517 return (EINVAL);
2518 }
2519 }
2520
2521 if ((ret = nvlist_unpack((char *)ppi->ppi_data,
2522 (size_t)ppi->ppi_data_size, &nv, KM_NOSLEEP)) != 0) {
2523 mutex_exit(&stmf_state.stmf_lock);
2524 return (ret);
2525 }
2526
2527 /* Free any existing lists and add this one to the ppd */
2528 if (ppd->ppd_nv)
2529 nvlist_free(ppd->ppd_nv);
2530 ppd->ppd_nv = nv;
2531
2532 /* set the token for writes */
2533 ppd->ppd_token++;
2534 /* return token to caller */
2535 if (ppi_token) {
2536 *ppi_token = ppd->ppd_token;
2537 }
2538
2539 /* If there is a provider registered, do the notifications */
2540 if (ppd->ppd_provider) {
2541 uint32_t cb_flags = 0;
2542
2543 if (stmf_state.stmf_config_state == STMF_CONFIG_INIT)
2544 cb_flags |= STMF_PCB_STMF_ONLINING;
2545 if (ppi->ppi_lu_provider) {
2546 ilp = (stmf_i_lu_provider_t *)ppd->ppd_provider;
2547 if (ilp->ilp_lp->lp_cb == NULL)
2548 goto bail_out;
2549 ilp->ilp_cb_in_progress = 1;
2550 mutex_exit(&stmf_state.stmf_lock);
2551 ilp->ilp_lp->lp_cb(ilp->ilp_lp,
2552 STMF_PROVIDER_DATA_UPDATED, ppd->ppd_nv, cb_flags);
2553 mutex_enter(&stmf_state.stmf_lock);
2554 ilp->ilp_cb_in_progress = 0;
2555 } else {
2556 ipp = (stmf_i_port_provider_t *)ppd->ppd_provider;
2557 if (ipp->ipp_pp->pp_cb == NULL)
2558 goto bail_out;
2559 ipp->ipp_cb_in_progress = 1;
2560 mutex_exit(&stmf_state.stmf_lock);
2561 ipp->ipp_pp->pp_cb(ipp->ipp_pp,
2562 STMF_PROVIDER_DATA_UPDATED, ppd->ppd_nv, cb_flags);
2563 mutex_enter(&stmf_state.stmf_lock);
2564 ipp->ipp_cb_in_progress = 0;
2565 }
2566 }
2567
2568 bail_out:
2569 mutex_exit(&stmf_state.stmf_lock);
2570
2571 return (0);
2572 }
2573
2574 void
stmf_delete_ppd(stmf_pp_data_t * ppd)2575 stmf_delete_ppd(stmf_pp_data_t *ppd)
2576 {
2577 stmf_pp_data_t **pppd;
2578
2579 ASSERT(mutex_owned(&stmf_state.stmf_lock));
2580 if (ppd->ppd_provider) {
2581 if (ppd->ppd_lu_provider) {
2582 ((stmf_i_lu_provider_t *)
2583 ppd->ppd_provider)->ilp_ppd = NULL;
2584 } else {
2585 ((stmf_i_port_provider_t *)
2586 ppd->ppd_provider)->ipp_ppd = NULL;
2587 }
2588 ppd->ppd_provider = NULL;
2589 }
2590
2591 for (pppd = &stmf_state.stmf_ppdlist; *pppd != NULL;
2592 pppd = &((*pppd)->ppd_next)) {
2593 if (*pppd == ppd)
2594 break;
2595 }
2596
2597 if (*pppd == NULL)
2598 return;
2599
2600 *pppd = ppd->ppd_next;
2601 if (ppd->ppd_nv)
2602 nvlist_free(ppd->ppd_nv);
2603
2604 kmem_free(ppd, ppd->ppd_alloc_size);
2605 }
2606
2607 int
stmf_delete_ppd_ioctl(stmf_ppioctl_data_t * ppi)2608 stmf_delete_ppd_ioctl(stmf_ppioctl_data_t *ppi)
2609 {
2610 stmf_pp_data_t *ppd;
2611 int ret = ENOENT;
2612
2613 if ((ppi->ppi_lu_provider + ppi->ppi_port_provider) != 1) {
2614 return (EINVAL);
2615 }
2616
2617 mutex_enter(&stmf_state.stmf_lock);
2618
2619 for (ppd = stmf_state.stmf_ppdlist; ppd != NULL; ppd = ppd->ppd_next) {
2620 if (ppi->ppi_lu_provider) {
2621 if (!ppd->ppd_lu_provider)
2622 continue;
2623 } else if (ppi->ppi_port_provider) {
2624 if (!ppd->ppd_port_provider)
2625 continue;
2626 }
2627 if (strncmp(ppi->ppi_name, ppd->ppd_name, 254) == 0)
2628 break;
2629 }
2630
2631 if (ppd) {
2632 ret = 0;
2633 stmf_delete_ppd(ppd);
2634 }
2635 mutex_exit(&stmf_state.stmf_lock);
2636
2637 return (ret);
2638 }
2639
2640 int
stmf_get_ppd_ioctl(stmf_ppioctl_data_t * ppi,stmf_ppioctl_data_t * ppi_out,uint32_t * err_ret)2641 stmf_get_ppd_ioctl(stmf_ppioctl_data_t *ppi, stmf_ppioctl_data_t *ppi_out,
2642 uint32_t *err_ret)
2643 {
2644 stmf_pp_data_t *ppd;
2645 size_t req_size;
2646 int ret = ENOENT;
2647 char *bufp = (char *)ppi_out->ppi_data;
2648
2649 if ((ppi->ppi_lu_provider + ppi->ppi_port_provider) != 1) {
2650 return (EINVAL);
2651 }
2652
2653 mutex_enter(&stmf_state.stmf_lock);
2654
2655 for (ppd = stmf_state.stmf_ppdlist; ppd != NULL; ppd = ppd->ppd_next) {
2656 if (ppi->ppi_lu_provider) {
2657 if (!ppd->ppd_lu_provider)
2658 continue;
2659 } else if (ppi->ppi_port_provider) {
2660 if (!ppd->ppd_port_provider)
2661 continue;
2662 }
2663 if (strncmp(ppi->ppi_name, ppd->ppd_name, 254) == 0)
2664 break;
2665 }
2666
2667 if (ppd && ppd->ppd_nv) {
2668 ppi_out->ppi_token = ppd->ppd_token;
2669 if ((ret = nvlist_size(ppd->ppd_nv, &req_size,
2670 NV_ENCODE_XDR)) != 0) {
2671 goto done;
2672 }
2673 ppi_out->ppi_data_size = req_size;
2674 if (req_size > ppi->ppi_data_size) {
2675 *err_ret = STMF_IOCERR_INSUFFICIENT_BUF;
2676 ret = EINVAL;
2677 goto done;
2678 }
2679
2680 if ((ret = nvlist_pack(ppd->ppd_nv, &bufp, &req_size,
2681 NV_ENCODE_XDR, 0)) != 0) {
2682 goto done;
2683 }
2684 ret = 0;
2685 }
2686
2687 done:
2688 mutex_exit(&stmf_state.stmf_lock);
2689
2690 return (ret);
2691 }
2692
2693 void
stmf_delete_all_ppds()2694 stmf_delete_all_ppds()
2695 {
2696 stmf_pp_data_t *ppd, *nppd;
2697
2698 ASSERT(mutex_owned(&stmf_state.stmf_lock));
2699 for (ppd = stmf_state.stmf_ppdlist; ppd != NULL; ppd = nppd) {
2700 nppd = ppd->ppd_next;
2701 stmf_delete_ppd(ppd);
2702 }
2703 }
2704
2705 /*
2706 * 16 is the max string length of a protocol_ident, increase
2707 * the size if needed.
2708 */
2709 #define STMF_KSTAT_LU_SZ (STMF_GUID_INPUT + 1 + 256)
2710 #define STMF_KSTAT_TGT_SZ (256 * 2 + 16)
2711
2712 /*
2713 * This array matches the Protocol Identifier in stmf_ioctl.h
2714 */
2715 #define MAX_PROTO_STR_LEN 32
2716
2717 char *protocol_ident[PROTOCOL_ANY] = {
2718 "Fibre Channel",
2719 "Parallel SCSI",
2720 "SSA",
2721 "IEEE_1394",
2722 "SRP",
2723 "iSCSI",
2724 "SAS",
2725 "ADT",
2726 "ATAPI",
2727 "UNKNOWN", "UNKNOWN", "UNKNOWN", "UNKNOWN", "UNKNOWN", "UNKNOWN"
2728 };
2729
2730 /*
2731 * Update the lun wait/run queue count
2732 */
2733 static void
stmf_update_kstat_lu_q(scsi_task_t * task,void func ())2734 stmf_update_kstat_lu_q(scsi_task_t *task, void func())
2735 {
2736 stmf_i_lu_t *ilu;
2737 kstat_io_t *kip;
2738
2739 if (task->task_lu == dlun0)
2740 return;
2741 ilu = (stmf_i_lu_t *)task->task_lu->lu_stmf_private;
2742 if (ilu != NULL && ilu->ilu_kstat_io != NULL) {
2743 kip = KSTAT_IO_PTR(ilu->ilu_kstat_io);
2744 if (kip != NULL) {
2745 func(kip);
2746 }
2747 }
2748 }
2749
2750 /*
2751 * Update the target(lport) wait/run queue count
2752 */
2753 static void
stmf_update_kstat_lport_q(scsi_task_t * task,void func ())2754 stmf_update_kstat_lport_q(scsi_task_t *task, void func())
2755 {
2756 stmf_i_local_port_t *ilp;
2757 kstat_io_t *kip;
2758
2759 ilp = (stmf_i_local_port_t *)task->task_lport->lport_stmf_private;
2760 if (ilp != NULL && ilp->ilport_kstat_io != NULL) {
2761 kip = KSTAT_IO_PTR(ilp->ilport_kstat_io);
2762 if (kip != NULL) {
2763 mutex_enter(ilp->ilport_kstat_io->ks_lock);
2764 func(kip);
2765 mutex_exit(ilp->ilport_kstat_io->ks_lock);
2766 }
2767 }
2768 }
2769
2770 static void
stmf_update_kstat_lport_io(scsi_task_t * task,stmf_data_buf_t * dbuf)2771 stmf_update_kstat_lport_io(scsi_task_t *task, stmf_data_buf_t *dbuf)
2772 {
2773 stmf_i_local_port_t *ilp;
2774 kstat_io_t *kip;
2775
2776 ilp = (stmf_i_local_port_t *)task->task_lport->lport_stmf_private;
2777 if (ilp != NULL && ilp->ilport_kstat_io != NULL) {
2778 kip = KSTAT_IO_PTR(ilp->ilport_kstat_io);
2779 if (kip != NULL) {
2780 mutex_enter(ilp->ilport_kstat_io->ks_lock);
2781 STMF_UPDATE_KSTAT_IO(kip, dbuf);
2782 mutex_exit(ilp->ilport_kstat_io->ks_lock);
2783 }
2784 }
2785 }
2786
2787 static void
stmf_update_kstat_lu_io(scsi_task_t * task,stmf_data_buf_t * dbuf)2788 stmf_update_kstat_lu_io(scsi_task_t *task, stmf_data_buf_t *dbuf)
2789 {
2790 stmf_i_lu_t *ilu;
2791 kstat_io_t *kip;
2792
2793 ilu = (stmf_i_lu_t *)task->task_lu->lu_stmf_private;
2794 if (ilu != NULL && ilu->ilu_kstat_io != NULL) {
2795 kip = KSTAT_IO_PTR(ilu->ilu_kstat_io);
2796 if (kip != NULL) {
2797 mutex_enter(ilu->ilu_kstat_io->ks_lock);
2798 STMF_UPDATE_KSTAT_IO(kip, dbuf);
2799 mutex_exit(ilu->ilu_kstat_io->ks_lock);
2800 }
2801 }
2802 }
2803
2804 static void
stmf_create_kstat_lu(stmf_i_lu_t * ilu)2805 stmf_create_kstat_lu(stmf_i_lu_t *ilu)
2806 {
2807 char ks_nm[KSTAT_STRLEN];
2808 stmf_kstat_lu_info_t *ks_lu;
2809
2810 /* create kstat lun info */
2811 ks_lu = (stmf_kstat_lu_info_t *)kmem_zalloc(STMF_KSTAT_LU_SZ,
2812 KM_NOSLEEP);
2813 if (ks_lu == NULL) {
2814 cmn_err(CE_WARN, "STMF: kmem_zalloc failed");
2815 return;
2816 }
2817
2818 bzero(ks_nm, sizeof (ks_nm));
2819 (void) sprintf(ks_nm, "stmf_lu_%"PRIxPTR"", (uintptr_t)ilu);
2820 if ((ilu->ilu_kstat_info = kstat_create(STMF_MODULE_NAME, 0,
2821 ks_nm, "misc", KSTAT_TYPE_NAMED,
2822 sizeof (stmf_kstat_lu_info_t) / sizeof (kstat_named_t),
2823 KSTAT_FLAG_VIRTUAL)) == NULL) {
2824 kmem_free(ks_lu, STMF_KSTAT_LU_SZ);
2825 cmn_err(CE_WARN, "STMF: kstat_create lu failed");
2826 return;
2827 }
2828
2829 ilu->ilu_kstat_info->ks_data_size = STMF_KSTAT_LU_SZ;
2830 ilu->ilu_kstat_info->ks_data = ks_lu;
2831
2832 kstat_named_init(&ks_lu->i_lun_guid, "lun-guid",
2833 KSTAT_DATA_STRING);
2834 kstat_named_init(&ks_lu->i_lun_alias, "lun-alias",
2835 KSTAT_DATA_STRING);
2836
2837 /* convert guid to hex string */
2838 int i;
2839 uint8_t *p = ilu->ilu_lu->lu_id->ident;
2840 bzero(ilu->ilu_ascii_hex_guid, sizeof (ilu->ilu_ascii_hex_guid));
2841 for (i = 0; i < STMF_GUID_INPUT / 2; i++) {
2842 (void) sprintf(&ilu->ilu_ascii_hex_guid[i * 2], "%02x", p[i]);
2843 }
2844 kstat_named_setstr(&ks_lu->i_lun_guid,
2845 (const char *)ilu->ilu_ascii_hex_guid);
2846 kstat_named_setstr(&ks_lu->i_lun_alias,
2847 (const char *)ilu->ilu_lu->lu_alias);
2848 kstat_install(ilu->ilu_kstat_info);
2849
2850 /* create kstat lun io */
2851 bzero(ks_nm, sizeof (ks_nm));
2852 (void) sprintf(ks_nm, "stmf_lu_io_%"PRIxPTR"", (uintptr_t)ilu);
2853 if ((ilu->ilu_kstat_io = kstat_create(STMF_MODULE_NAME, 0,
2854 ks_nm, "io", KSTAT_TYPE_IO, 1, 0)) == NULL) {
2855 cmn_err(CE_WARN, "STMF: kstat_create lu_io failed");
2856 return;
2857 }
2858 mutex_init(&ilu->ilu_kstat_lock, NULL, MUTEX_DRIVER, 0);
2859 ilu->ilu_kstat_io->ks_lock = &ilu->ilu_kstat_lock;
2860 kstat_install(ilu->ilu_kstat_io);
2861 }
2862
2863 static void
stmf_create_kstat_lport(stmf_i_local_port_t * ilport)2864 stmf_create_kstat_lport(stmf_i_local_port_t *ilport)
2865 {
2866 char ks_nm[KSTAT_STRLEN];
2867 stmf_kstat_tgt_info_t *ks_tgt;
2868 int id, len;
2869
2870 /* create kstat lport info */
2871 ks_tgt = (stmf_kstat_tgt_info_t *)kmem_zalloc(STMF_KSTAT_TGT_SZ,
2872 KM_NOSLEEP);
2873 if (ks_tgt == NULL) {
2874 cmn_err(CE_WARN, "STMF: kmem_zalloc failed");
2875 return;
2876 }
2877
2878 bzero(ks_nm, sizeof (ks_nm));
2879 (void) sprintf(ks_nm, "stmf_tgt_%"PRIxPTR"", (uintptr_t)ilport);
2880 if ((ilport->ilport_kstat_info = kstat_create(STMF_MODULE_NAME,
2881 0, ks_nm, "misc", KSTAT_TYPE_NAMED,
2882 sizeof (stmf_kstat_tgt_info_t) / sizeof (kstat_named_t),
2883 KSTAT_FLAG_VIRTUAL)) == NULL) {
2884 kmem_free(ks_tgt, STMF_KSTAT_TGT_SZ);
2885 cmn_err(CE_WARN, "STMF: kstat_create target failed");
2886 return;
2887 }
2888
2889 ilport->ilport_kstat_info->ks_data_size = STMF_KSTAT_TGT_SZ;
2890 ilport->ilport_kstat_info->ks_data = ks_tgt;
2891
2892 kstat_named_init(&ks_tgt->i_tgt_name, "target-name",
2893 KSTAT_DATA_STRING);
2894 kstat_named_init(&ks_tgt->i_tgt_alias, "target-alias",
2895 KSTAT_DATA_STRING);
2896 kstat_named_init(&ks_tgt->i_protocol, "protocol",
2897 KSTAT_DATA_STRING);
2898
2899 /* ident might not be null terminated */
2900 len = ilport->ilport_lport->lport_id->ident_length;
2901 bcopy(ilport->ilport_lport->lport_id->ident,
2902 ilport->ilport_kstat_tgt_name, len);
2903 ilport->ilport_kstat_tgt_name[len + 1] = NULL;
2904 kstat_named_setstr(&ks_tgt->i_tgt_name,
2905 (const char *)ilport->ilport_kstat_tgt_name);
2906 kstat_named_setstr(&ks_tgt->i_tgt_alias,
2907 (const char *)ilport->ilport_lport->lport_alias);
2908 /* protocol */
2909 if ((id = ilport->ilport_lport->lport_id->protocol_id) > PROTOCOL_ANY) {
2910 cmn_err(CE_WARN, "STMF: protocol_id out of bound");
2911 id = PROTOCOL_ANY;
2912 }
2913 kstat_named_setstr(&ks_tgt->i_protocol, protocol_ident[id]);
2914 kstat_install(ilport->ilport_kstat_info);
2915
2916 /* create kstat lport io */
2917 bzero(ks_nm, sizeof (ks_nm));
2918 (void) sprintf(ks_nm, "stmf_tgt_io_%"PRIxPTR"", (uintptr_t)ilport);
2919 if ((ilport->ilport_kstat_io = kstat_create(STMF_MODULE_NAME, 0,
2920 ks_nm, "io", KSTAT_TYPE_IO, 1, 0)) == NULL) {
2921 cmn_err(CE_WARN, "STMF: kstat_create target_io failed");
2922 return;
2923 }
2924 mutex_init(&ilport->ilport_kstat_lock, NULL, MUTEX_DRIVER, 0);
2925 ilport->ilport_kstat_io->ks_lock = &ilport->ilport_kstat_lock;
2926 kstat_install(ilport->ilport_kstat_io);
2927 }
2928
2929 /*
2930 * set the asymmetric access state for a logical unit
2931 * caller is responsible for establishing SCSI unit attention on
2932 * state change
2933 */
2934 stmf_status_t
stmf_set_lu_access(stmf_lu_t * lu,uint8_t access_state)2935 stmf_set_lu_access(stmf_lu_t *lu, uint8_t access_state)
2936 {
2937 stmf_i_lu_t *ilu;
2938 uint8_t *p1, *p2;
2939
2940 if ((access_state != STMF_LU_STANDBY) &&
2941 (access_state != STMF_LU_ACTIVE)) {
2942 return (STMF_INVALID_ARG);
2943 }
2944
2945 p1 = &lu->lu_id->ident[0];
2946 mutex_enter(&stmf_state.stmf_lock);
2947 if (stmf_state.stmf_inventory_locked) {
2948 mutex_exit(&stmf_state.stmf_lock);
2949 return (STMF_BUSY);
2950 }
2951
2952 for (ilu = stmf_state.stmf_ilulist; ilu != NULL; ilu = ilu->ilu_next) {
2953 p2 = &ilu->ilu_lu->lu_id->ident[0];
2954 if (bcmp(p1, p2, 16) == 0) {
2955 break;
2956 }
2957 }
2958
2959 if (!ilu) {
2960 ilu = (stmf_i_lu_t *)lu->lu_stmf_private;
2961 } else {
2962 /*
2963 * We're changing access state on an existing logical unit
2964 * Send the proxy registration message for this logical unit
2965 * if we're in alua mode.
2966 * If the requested state is STMF_LU_ACTIVE, we want to register
2967 * this logical unit.
2968 * If the requested state is STMF_LU_STANDBY, we're going to
2969 * abort all tasks for this logical unit.
2970 */
2971 if (stmf_state.stmf_alua_state == 1 &&
2972 access_state == STMF_LU_ACTIVE) {
2973 stmf_ic_msg_status_t ic_ret = STMF_IC_MSG_SUCCESS;
2974 stmf_ic_msg_t *ic_reg_lun;
2975 if (lu->lu_lp && lu->lu_lp->lp_lpif_rev == LPIF_REV_2 &&
2976 lu->lu_lp->lp_alua_support) {
2977 ilu->ilu_alua = 1;
2978 /* allocate the register message */
2979 ic_reg_lun = ic_lun_active_msg_alloc(p1,
2980 lu->lu_lp->lp_name,
2981 lu->lu_proxy_reg_arg_len,
2982 (uint8_t *)lu->lu_proxy_reg_arg,
2983 stmf_proxy_msg_id);
2984 /* send the message */
2985 if (ic_reg_lun) {
2986 ic_ret = ic_tx_msg(ic_reg_lun);
2987 if (ic_ret == STMF_IC_MSG_SUCCESS) {
2988 stmf_proxy_msg_id++;
2989 }
2990 }
2991 }
2992 } else if (stmf_state.stmf_alua_state == 1 &&
2993 access_state == STMF_LU_STANDBY) {
2994 /* abort all tasks for this lu */
2995 stmf_task_lu_killall(lu, NULL, STMF_ABORTED);
2996 }
2997 }
2998
2999 ilu->ilu_access = access_state;
3000
3001 mutex_exit(&stmf_state.stmf_lock);
3002 return (STMF_SUCCESS);
3003 }
3004
3005
3006 stmf_status_t
stmf_register_lu(stmf_lu_t * lu)3007 stmf_register_lu(stmf_lu_t *lu)
3008 {
3009 stmf_i_lu_t *ilu;
3010 uint8_t *p1, *p2;
3011 stmf_state_change_info_t ssci;
3012 stmf_id_data_t *luid;
3013
3014 if ((lu->lu_id->ident_type != ID_TYPE_NAA) ||
3015 (lu->lu_id->ident_length != 16) ||
3016 ((lu->lu_id->ident[0] & 0xf0) != 0x60)) {
3017 return (STMF_INVALID_ARG);
3018 }
3019 p1 = &lu->lu_id->ident[0];
3020 mutex_enter(&stmf_state.stmf_lock);
3021 if (stmf_state.stmf_inventory_locked) {
3022 mutex_exit(&stmf_state.stmf_lock);
3023 return (STMF_BUSY);
3024 }
3025
3026 for (ilu = stmf_state.stmf_ilulist; ilu != NULL; ilu = ilu->ilu_next) {
3027 p2 = &ilu->ilu_lu->lu_id->ident[0];
3028 if (bcmp(p1, p2, 16) == 0) {
3029 mutex_exit(&stmf_state.stmf_lock);
3030 return (STMF_ALREADY);
3031 }
3032 }
3033
3034 ilu = (stmf_i_lu_t *)lu->lu_stmf_private;
3035 luid = stmf_lookup_id(&stmf_state.stmf_luid_list,
3036 lu->lu_id->ident_length, lu->lu_id->ident);
3037 if (luid) {
3038 luid->id_pt_to_object = (void *)ilu;
3039 ilu->ilu_luid = luid;
3040 }
3041 ilu->ilu_alias = NULL;
3042
3043 ilu->ilu_next = stmf_state.stmf_ilulist;
3044 ilu->ilu_prev = NULL;
3045 if (ilu->ilu_next)
3046 ilu->ilu_next->ilu_prev = ilu;
3047 stmf_state.stmf_ilulist = ilu;
3048 stmf_state.stmf_nlus++;
3049 if (lu->lu_lp) {
3050 ((stmf_i_lu_provider_t *)
3051 (lu->lu_lp->lp_stmf_private))->ilp_nlus++;
3052 }
3053 ilu->ilu_cur_task_cntr = &ilu->ilu_task_cntr1;
3054 STMF_EVENT_ALLOC_HANDLE(ilu->ilu_event_hdl);
3055 cv_init(&ilu->ilu_offline_pending_cv, NULL, CV_DRIVER, NULL);
3056 stmf_create_kstat_lu(ilu);
3057 /*
3058 * register with proxy module if available and logical unit
3059 * is in active state
3060 */
3061 if (stmf_state.stmf_alua_state == 1 &&
3062 ilu->ilu_access == STMF_LU_ACTIVE) {
3063 stmf_ic_msg_status_t ic_ret = STMF_IC_MSG_SUCCESS;
3064 stmf_ic_msg_t *ic_reg_lun;
3065 if (lu->lu_lp && lu->lu_lp->lp_lpif_rev == LPIF_REV_2 &&
3066 lu->lu_lp->lp_alua_support) {
3067 ilu->ilu_alua = 1;
3068 /* allocate the register message */
3069 ic_reg_lun = ic_reg_lun_msg_alloc(p1,
3070 lu->lu_lp->lp_name, lu->lu_proxy_reg_arg_len,
3071 (uint8_t *)lu->lu_proxy_reg_arg, stmf_proxy_msg_id);
3072 /* send the message */
3073 if (ic_reg_lun) {
3074 ic_ret = ic_tx_msg(ic_reg_lun);
3075 if (ic_ret == STMF_IC_MSG_SUCCESS) {
3076 stmf_proxy_msg_id++;
3077 }
3078 }
3079 }
3080 }
3081 mutex_exit(&stmf_state.stmf_lock);
3082
3083 /* check the default state for lu */
3084 if (stmf_state.stmf_default_lu_state == STMF_STATE_OFFLINE) {
3085 ilu->ilu_prev_state = STMF_STATE_OFFLINE;
3086 } else {
3087 ilu->ilu_prev_state = STMF_STATE_ONLINE;
3088 if (stmf_state.stmf_service_running) {
3089 ssci.st_rflags = 0;
3090 ssci.st_additional_info = NULL;
3091 (void) stmf_ctl(STMF_CMD_LU_ONLINE, lu, &ssci);
3092 }
3093 }
3094
3095 /* XXX: Generate event */
3096 return (STMF_SUCCESS);
3097 }
3098
3099 stmf_status_t
stmf_deregister_lu(stmf_lu_t * lu)3100 stmf_deregister_lu(stmf_lu_t *lu)
3101 {
3102 stmf_i_lu_t *ilu;
3103
3104 mutex_enter(&stmf_state.stmf_lock);
3105 if (stmf_state.stmf_inventory_locked) {
3106 mutex_exit(&stmf_state.stmf_lock);
3107 return (STMF_BUSY);
3108 }
3109 ilu = stmf_lookup_lu(lu);
3110 if (ilu == NULL) {
3111 mutex_exit(&stmf_state.stmf_lock);
3112 return (STMF_INVALID_ARG);
3113 }
3114 if (ilu->ilu_state == STMF_STATE_OFFLINE) {
3115 ASSERT(ilu->ilu_ntasks == ilu->ilu_ntasks_free);
3116 while (ilu->ilu_flags & ILU_STALL_DEREGISTER) {
3117 cv_wait(&stmf_state.stmf_cv, &stmf_state.stmf_lock);
3118 }
3119 if (ilu->ilu_ntasks) {
3120 stmf_i_scsi_task_t *itask, *nitask;
3121
3122 nitask = ilu->ilu_tasks;
3123 do {
3124 itask = nitask;
3125 nitask = itask->itask_lu_next;
3126 lu->lu_task_free(itask->itask_task);
3127 stmf_free(itask->itask_task);
3128 } while (nitask != NULL);
3129
3130 ilu->ilu_tasks = ilu->ilu_free_tasks = NULL;
3131 ilu->ilu_ntasks = ilu->ilu_ntasks_free = 0;
3132 }
3133 /* de-register with proxy if available */
3134 if (ilu->ilu_access == STMF_LU_ACTIVE &&
3135 stmf_state.stmf_alua_state == 1) {
3136 /* de-register with proxy module */
3137 stmf_ic_msg_status_t ic_ret = STMF_IC_MSG_SUCCESS;
3138 stmf_ic_msg_t *ic_dereg_lun;
3139 if (lu->lu_lp && lu->lu_lp->lp_lpif_rev == LPIF_REV_2 &&
3140 lu->lu_lp->lp_alua_support) {
3141 ilu->ilu_alua = 1;
3142 /* allocate the de-register message */
3143 ic_dereg_lun = ic_dereg_lun_msg_alloc(
3144 lu->lu_id->ident, lu->lu_lp->lp_name, 0,
3145 NULL, stmf_proxy_msg_id);
3146 /* send the message */
3147 if (ic_dereg_lun) {
3148 ic_ret = ic_tx_msg(ic_dereg_lun);
3149 if (ic_ret == STMF_IC_MSG_SUCCESS) {
3150 stmf_proxy_msg_id++;
3151 }
3152 }
3153 }
3154 }
3155
3156 if (ilu->ilu_next)
3157 ilu->ilu_next->ilu_prev = ilu->ilu_prev;
3158 if (ilu->ilu_prev)
3159 ilu->ilu_prev->ilu_next = ilu->ilu_next;
3160 else
3161 stmf_state.stmf_ilulist = ilu->ilu_next;
3162 stmf_state.stmf_nlus--;
3163
3164 if (ilu == stmf_state.stmf_svc_ilu_draining) {
3165 stmf_state.stmf_svc_ilu_draining = ilu->ilu_next;
3166 }
3167 if (ilu == stmf_state.stmf_svc_ilu_timing) {
3168 stmf_state.stmf_svc_ilu_timing = ilu->ilu_next;
3169 }
3170 if (lu->lu_lp) {
3171 ((stmf_i_lu_provider_t *)
3172 (lu->lu_lp->lp_stmf_private))->ilp_nlus--;
3173 }
3174 if (ilu->ilu_luid) {
3175 ((stmf_id_data_t *)ilu->ilu_luid)->id_pt_to_object =
3176 NULL;
3177 ilu->ilu_luid = NULL;
3178 }
3179 STMF_EVENT_FREE_HANDLE(ilu->ilu_event_hdl);
3180 } else {
3181 mutex_exit(&stmf_state.stmf_lock);
3182 return (STMF_BUSY);
3183 }
3184 if (ilu->ilu_kstat_info) {
3185 kmem_free(ilu->ilu_kstat_info->ks_data,
3186 ilu->ilu_kstat_info->ks_data_size);
3187 kstat_delete(ilu->ilu_kstat_info);
3188 }
3189 if (ilu->ilu_kstat_io) {
3190 kstat_delete(ilu->ilu_kstat_io);
3191 mutex_destroy(&ilu->ilu_kstat_lock);
3192 }
3193 cv_destroy(&ilu->ilu_offline_pending_cv);
3194 mutex_exit(&stmf_state.stmf_lock);
3195 return (STMF_SUCCESS);
3196 }
3197
3198 void
stmf_set_port_standby(stmf_local_port_t * lport,uint16_t rtpid)3199 stmf_set_port_standby(stmf_local_port_t *lport, uint16_t rtpid)
3200 {
3201 stmf_i_local_port_t *ilport =
3202 (stmf_i_local_port_t *)lport->lport_stmf_private;
3203 ilport->ilport_rtpid = rtpid;
3204 ilport->ilport_standby = 1;
3205 }
3206
3207 void
stmf_set_port_alua(stmf_local_port_t * lport)3208 stmf_set_port_alua(stmf_local_port_t *lport)
3209 {
3210 stmf_i_local_port_t *ilport =
3211 (stmf_i_local_port_t *)lport->lport_stmf_private;
3212 ilport->ilport_alua = 1;
3213 }
3214
3215 stmf_status_t
stmf_register_local_port(stmf_local_port_t * lport)3216 stmf_register_local_port(stmf_local_port_t *lport)
3217 {
3218 stmf_i_local_port_t *ilport;
3219 stmf_state_change_info_t ssci;
3220 int start_workers = 0;
3221
3222 mutex_enter(&stmf_state.stmf_lock);
3223 if (stmf_state.stmf_inventory_locked) {
3224 mutex_exit(&stmf_state.stmf_lock);
3225 return (STMF_BUSY);
3226 }
3227 ilport = (stmf_i_local_port_t *)lport->lport_stmf_private;
3228 rw_init(&ilport->ilport_lock, NULL, RW_DRIVER, NULL);
3229
3230 ilport->ilport_instance =
3231 id_alloc_nosleep(stmf_state.stmf_ilport_inst_space);
3232 if (ilport->ilport_instance == -1) {
3233 mutex_exit(&stmf_state.stmf_lock);
3234 return (STMF_FAILURE);
3235 }
3236 ilport->ilport_next = stmf_state.stmf_ilportlist;
3237 ilport->ilport_prev = NULL;
3238 if (ilport->ilport_next)
3239 ilport->ilport_next->ilport_prev = ilport;
3240 stmf_state.stmf_ilportlist = ilport;
3241 stmf_state.stmf_nlports++;
3242 if (lport->lport_pp) {
3243 ((stmf_i_port_provider_t *)
3244 (lport->lport_pp->pp_stmf_private))->ipp_npps++;
3245 }
3246 ilport->ilport_tg =
3247 stmf_lookup_group_for_target(lport->lport_id->ident,
3248 lport->lport_id->ident_length);
3249
3250 /*
3251 * rtpid will/must be set if this is a standby port
3252 * only register ports that are not standby (proxy) ports
3253 * and ports that are alua participants (ilport_alua == 1)
3254 */
3255 if (ilport->ilport_standby == 0) {
3256 ilport->ilport_rtpid = atomic_inc_16_nv(&stmf_rtpid_counter);
3257 }
3258
3259 if (stmf_state.stmf_alua_state == 1 &&
3260 ilport->ilport_standby == 0 &&
3261 ilport->ilport_alua == 1) {
3262 stmf_ic_msg_t *ic_reg_port;
3263 stmf_ic_msg_status_t ic_ret;
3264 stmf_local_port_t *lport;
3265 lport = ilport->ilport_lport;
3266 ic_reg_port = ic_reg_port_msg_alloc(
3267 lport->lport_id, ilport->ilport_rtpid,
3268 0, NULL, stmf_proxy_msg_id);
3269 if (ic_reg_port) {
3270 ic_ret = ic_tx_msg(ic_reg_port);
3271 if (ic_ret == STMF_IC_MSG_SUCCESS) {
3272 ilport->ilport_reg_msgid = stmf_proxy_msg_id++;
3273 } else {
3274 cmn_err(CE_WARN, "error on port registration "
3275 "port - %s", ilport->ilport_kstat_tgt_name);
3276 }
3277 }
3278 }
3279 STMF_EVENT_ALLOC_HANDLE(ilport->ilport_event_hdl);
3280 stmf_create_kstat_lport(ilport);
3281 if (stmf_workers_state == STMF_WORKERS_DISABLED) {
3282 stmf_workers_state = STMF_WORKERS_ENABLING;
3283 start_workers = 1;
3284 }
3285 mutex_exit(&stmf_state.stmf_lock);
3286
3287 if (start_workers)
3288 stmf_worker_init();
3289
3290 /* the default state of LPORT */
3291
3292 if (stmf_state.stmf_default_lport_state == STMF_STATE_OFFLINE) {
3293 ilport->ilport_prev_state = STMF_STATE_OFFLINE;
3294 } else {
3295 ilport->ilport_prev_state = STMF_STATE_ONLINE;
3296 if (stmf_state.stmf_service_running) {
3297 ssci.st_rflags = 0;
3298 ssci.st_additional_info = NULL;
3299 (void) stmf_ctl(STMF_CMD_LPORT_ONLINE, lport, &ssci);
3300 }
3301 }
3302
3303 /* XXX: Generate event */
3304 return (STMF_SUCCESS);
3305 }
3306
3307 stmf_status_t
stmf_deregister_local_port(stmf_local_port_t * lport)3308 stmf_deregister_local_port(stmf_local_port_t *lport)
3309 {
3310 stmf_i_local_port_t *ilport;
3311
3312 mutex_enter(&stmf_state.stmf_lock);
3313 if (stmf_state.stmf_inventory_locked) {
3314 mutex_exit(&stmf_state.stmf_lock);
3315 return (STMF_BUSY);
3316 }
3317
3318 /* dequeue all object requests from active queue */
3319 stmf_svc_kill_obj_requests(lport);
3320
3321 ilport = (stmf_i_local_port_t *)lport->lport_stmf_private;
3322
3323 /*
3324 * deregister ports that are not standby (proxy)
3325 */
3326 if (stmf_state.stmf_alua_state == 1 &&
3327 ilport->ilport_standby == 0 &&
3328 ilport->ilport_alua == 1) {
3329 stmf_ic_msg_t *ic_dereg_port;
3330 stmf_ic_msg_status_t ic_ret;
3331 ic_dereg_port = ic_dereg_port_msg_alloc(
3332 lport->lport_id, 0, NULL, stmf_proxy_msg_id);
3333 if (ic_dereg_port) {
3334 ic_ret = ic_tx_msg(ic_dereg_port);
3335 if (ic_ret == STMF_IC_MSG_SUCCESS) {
3336 stmf_proxy_msg_id++;
3337 }
3338 }
3339 }
3340
3341 if (ilport->ilport_nsessions == 0) {
3342 if (ilport->ilport_next)
3343 ilport->ilport_next->ilport_prev = ilport->ilport_prev;
3344 if (ilport->ilport_prev)
3345 ilport->ilport_prev->ilport_next = ilport->ilport_next;
3346 else
3347 stmf_state.stmf_ilportlist = ilport->ilport_next;
3348 id_free(stmf_state.stmf_ilport_inst_space,
3349 ilport->ilport_instance);
3350 rw_destroy(&ilport->ilport_lock);
3351 stmf_state.stmf_nlports--;
3352 if (lport->lport_pp) {
3353 ((stmf_i_port_provider_t *)
3354 (lport->lport_pp->pp_stmf_private))->ipp_npps--;
3355 }
3356 ilport->ilport_tg = NULL;
3357 STMF_EVENT_FREE_HANDLE(ilport->ilport_event_hdl);
3358 } else {
3359 mutex_exit(&stmf_state.stmf_lock);
3360 return (STMF_BUSY);
3361 }
3362 if (ilport->ilport_kstat_info) {
3363 kmem_free(ilport->ilport_kstat_info->ks_data,
3364 ilport->ilport_kstat_info->ks_data_size);
3365 kstat_delete(ilport->ilport_kstat_info);
3366 }
3367 if (ilport->ilport_kstat_io) {
3368 kstat_delete(ilport->ilport_kstat_io);
3369 mutex_destroy(&ilport->ilport_kstat_lock);
3370 }
3371 mutex_exit(&stmf_state.stmf_lock);
3372 return (STMF_SUCCESS);
3373 }
3374
3375 /*
3376 * Rport id/instance mappings remain valid until STMF is unloaded
3377 */
3378 static int
stmf_irport_compare(const void * void_irport1,const void * void_irport2)3379 stmf_irport_compare(const void *void_irport1, const void *void_irport2)
3380 {
3381 const stmf_i_remote_port_t *irport1 = void_irport1;
3382 const stmf_i_remote_port_t *irport2 = void_irport2;
3383 int result;
3384
3385 /* Sort by code set then ident */
3386 if (irport1->irport_id->code_set <
3387 irport2->irport_id->code_set) {
3388 return (-1);
3389 } else if (irport1->irport_id->code_set >
3390 irport2->irport_id->code_set) {
3391 return (1);
3392 }
3393
3394 /* Next by ident length */
3395 if (irport1->irport_id->ident_length <
3396 irport2->irport_id->ident_length) {
3397 return (-1);
3398 } else if (irport1->irport_id->ident_length >
3399 irport2->irport_id->ident_length) {
3400 return (1);
3401 }
3402
3403 /* Code set and ident length both match, now compare idents */
3404 result = memcmp(irport1->irport_id->ident,
3405 irport2->irport_id->ident,
3406 irport1->irport_id->ident_length);
3407
3408 if (result < 0) {
3409 return (-1);
3410 } else if (result > 0) {
3411 return (1);
3412 }
3413
3414 return (0);
3415 }
3416
3417 static stmf_i_remote_port_t *
stmf_irport_create(scsi_devid_desc_t * rport_devid)3418 stmf_irport_create(scsi_devid_desc_t *rport_devid)
3419 {
3420 int alloc_len;
3421 stmf_i_remote_port_t *irport;
3422
3423 /*
3424 * Lookup will bump the refcnt if there's an existing rport
3425 * context for this identifier.
3426 */
3427 ASSERT(mutex_owned(&stmf_state.stmf_lock));
3428
3429 alloc_len = sizeof (*irport) + sizeof (scsi_devid_desc_t) +
3430 rport_devid->ident_length - 1;
3431 irport = kmem_zalloc(alloc_len, KM_NOSLEEP);
3432 if (irport == NULL) {
3433 return (NULL);
3434 }
3435
3436 irport->irport_instance =
3437 id_alloc_nosleep(stmf_state.stmf_irport_inst_space);
3438 if (irport->irport_instance == -1) {
3439 kmem_free(irport, alloc_len);
3440 return (NULL);
3441 }
3442
3443 irport->irport_id =
3444 (struct scsi_devid_desc *)(irport + 1); /* Ptr. Arith. */
3445 bcopy(rport_devid, irport->irport_id,
3446 sizeof (scsi_devid_desc_t) + rport_devid->ident_length - 1);
3447 irport->irport_refcnt = 1;
3448 mutex_init(&irport->irport_mutex, NULL, MUTEX_DEFAULT, NULL);
3449
3450 return (irport);
3451 }
3452
3453 static void
stmf_irport_destroy(stmf_i_remote_port_t * irport)3454 stmf_irport_destroy(stmf_i_remote_port_t *irport)
3455 {
3456 id_free(stmf_state.stmf_irport_inst_space, irport->irport_instance);
3457 mutex_destroy(&irport->irport_mutex);
3458 kmem_free(irport, sizeof (*irport) + sizeof (scsi_devid_desc_t) +
3459 irport->irport_id->ident_length - 1);
3460 }
3461
3462 static stmf_i_remote_port_t *
stmf_irport_register(scsi_devid_desc_t * rport_devid)3463 stmf_irport_register(scsi_devid_desc_t *rport_devid)
3464 {
3465 stmf_i_remote_port_t *irport;
3466
3467 mutex_enter(&stmf_state.stmf_lock);
3468
3469 /*
3470 * Lookup will bump the refcnt if there's an existing rport
3471 * context for this identifier.
3472 */
3473 if ((irport = stmf_irport_lookup_locked(rport_devid)) != NULL) {
3474 mutex_exit(&stmf_state.stmf_lock);
3475 return (irport);
3476 }
3477
3478 irport = stmf_irport_create(rport_devid);
3479 if (irport == NULL) {
3480 mutex_exit(&stmf_state.stmf_lock);
3481 return (NULL);
3482 }
3483
3484 avl_add(&stmf_state.stmf_irportlist, irport);
3485 mutex_exit(&stmf_state.stmf_lock);
3486
3487 return (irport);
3488 }
3489
3490 static stmf_i_remote_port_t *
stmf_irport_lookup_locked(scsi_devid_desc_t * rport_devid)3491 stmf_irport_lookup_locked(scsi_devid_desc_t *rport_devid)
3492 {
3493 stmf_i_remote_port_t *irport;
3494 stmf_i_remote_port_t tmp_irport;
3495
3496 ASSERT(mutex_owned(&stmf_state.stmf_lock));
3497 tmp_irport.irport_id = rport_devid;
3498 irport = avl_find(&stmf_state.stmf_irportlist, &tmp_irport, NULL);
3499 if (irport != NULL) {
3500 mutex_enter(&irport->irport_mutex);
3501 irport->irport_refcnt++;
3502 mutex_exit(&irport->irport_mutex);
3503 }
3504
3505 return (irport);
3506 }
3507
3508 static void
stmf_irport_deregister(stmf_i_remote_port_t * irport)3509 stmf_irport_deregister(stmf_i_remote_port_t *irport)
3510 {
3511 /*
3512 * If we were actually going to remove unreferenced remote ports
3513 * we would want to acquire stmf_state.stmf_lock before getting
3514 * the irport mutex.
3515 *
3516 * Instead we're just going to leave it there even if unreferenced.
3517 */
3518 mutex_enter(&irport->irport_mutex);
3519 irport->irport_refcnt--;
3520 mutex_exit(&irport->irport_mutex);
3521 }
3522
3523 /*
3524 * Port provider has to make sure that register/deregister session and
3525 * port are serialized calls.
3526 */
3527 stmf_status_t
stmf_register_scsi_session(stmf_local_port_t * lport,stmf_scsi_session_t * ss)3528 stmf_register_scsi_session(stmf_local_port_t *lport, stmf_scsi_session_t *ss)
3529 {
3530 stmf_i_scsi_session_t *iss;
3531 stmf_i_local_port_t *ilport = (stmf_i_local_port_t *)
3532 lport->lport_stmf_private;
3533 uint8_t lun[8];
3534
3535 /*
3536 * Port state has to be online to register a scsi session. It is
3537 * possible that we started an offline operation and a new SCSI
3538 * session started at the same time (in that case also we are going
3539 * to fail the registeration). But any other state is simply
3540 * a bad port provider implementation.
3541 */
3542 if (ilport->ilport_state != STMF_STATE_ONLINE) {
3543 if (ilport->ilport_state != STMF_STATE_OFFLINING) {
3544 stmf_trace(lport->lport_alias, "Port is trying to "
3545 "register a session while the state is neither "
3546 "online nor offlining");
3547 }
3548 return (STMF_FAILURE);
3549 }
3550 bzero(lun, 8);
3551 iss = (stmf_i_scsi_session_t *)ss->ss_stmf_private;
3552 if ((iss->iss_irport = stmf_irport_register(ss->ss_rport_id)) == NULL) {
3553 stmf_trace(lport->lport_alias, "Could not register "
3554 "remote port during session registration");
3555 return (STMF_FAILURE);
3556 }
3557
3558 iss->iss_flags |= ISS_BEING_CREATED;
3559
3560 if (ss->ss_rport == NULL) {
3561 iss->iss_flags |= ISS_NULL_TPTID;
3562 ss->ss_rport = stmf_scsilib_devid_to_remote_port(
3563 ss->ss_rport_id);
3564 if (ss->ss_rport == NULL) {
3565 iss->iss_flags &= ~(ISS_NULL_TPTID | ISS_BEING_CREATED);
3566 stmf_trace(lport->lport_alias, "Device id to "
3567 "remote port conversion failed");
3568 return (STMF_FAILURE);
3569 }
3570 } else {
3571 if (!stmf_scsilib_tptid_validate(ss->ss_rport->rport_tptid,
3572 ss->ss_rport->rport_tptid_sz, NULL)) {
3573 iss->iss_flags &= ~ISS_BEING_CREATED;
3574 stmf_trace(lport->lport_alias, "Remote port "
3575 "transport id validation failed");
3576 return (STMF_FAILURE);
3577 }
3578 }
3579
3580 /* sessions use the ilport_lock. No separate lock is required */
3581 iss->iss_lockp = &ilport->ilport_lock;
3582
3583 if (iss->iss_sm != NULL)
3584 cmn_err(CE_PANIC, "create lun map called with non NULL map");
3585 iss->iss_sm = (stmf_lun_map_t *)kmem_zalloc(sizeof (stmf_lun_map_t),
3586 KM_SLEEP);
3587
3588 mutex_enter(&stmf_state.stmf_lock);
3589 rw_enter(&ilport->ilport_lock, RW_WRITER);
3590 (void) stmf_session_create_lun_map(ilport, iss);
3591 ilport->ilport_nsessions++;
3592 iss->iss_next = ilport->ilport_ss_list;
3593 ilport->ilport_ss_list = iss;
3594 rw_exit(&ilport->ilport_lock);
3595 mutex_exit(&stmf_state.stmf_lock);
3596
3597 iss->iss_creation_time = ddi_get_time();
3598 ss->ss_session_id = atomic_inc_64_nv(&stmf_session_counter);
3599 iss->iss_flags &= ~ISS_BEING_CREATED;
3600 /* XXX should we remove ISS_LUN_INVENTORY_CHANGED on new session? */
3601 iss->iss_flags &= ~ISS_LUN_INVENTORY_CHANGED;
3602 DTRACE_PROBE2(session__online, stmf_local_port_t *, lport,
3603 stmf_scsi_session_t *, ss);
3604 return (STMF_SUCCESS);
3605 }
3606
3607 void
stmf_deregister_scsi_session(stmf_local_port_t * lport,stmf_scsi_session_t * ss)3608 stmf_deregister_scsi_session(stmf_local_port_t *lport, stmf_scsi_session_t *ss)
3609 {
3610 stmf_i_local_port_t *ilport = (stmf_i_local_port_t *)
3611 lport->lport_stmf_private;
3612 stmf_i_scsi_session_t *iss, **ppss;
3613 int found = 0;
3614 stmf_ic_msg_t *ic_session_dereg;
3615 stmf_status_t ic_ret = STMF_FAILURE;
3616
3617 DTRACE_PROBE2(session__offline, stmf_local_port_t *, lport,
3618 stmf_scsi_session_t *, ss);
3619
3620 iss = (stmf_i_scsi_session_t *)ss->ss_stmf_private;
3621 if (ss->ss_rport_alias) {
3622 ss->ss_rport_alias = NULL;
3623 }
3624
3625 try_dereg_ss_again:
3626 mutex_enter(&stmf_state.stmf_lock);
3627 atomic_and_32(&iss->iss_flags,
3628 ~(ISS_LUN_INVENTORY_CHANGED | ISS_GOT_INITIAL_LUNS));
3629 if (iss->iss_flags & ISS_EVENT_ACTIVE) {
3630 mutex_exit(&stmf_state.stmf_lock);
3631 delay(1);
3632 goto try_dereg_ss_again;
3633 }
3634
3635 /* dereg proxy session if not standby port */
3636 if (stmf_state.stmf_alua_state == 1 &&
3637 ilport->ilport_standby == 0 &&
3638 ilport->ilport_alua == 1) {
3639 ic_session_dereg = ic_session_dereg_msg_alloc(
3640 ss, stmf_proxy_msg_id);
3641 if (ic_session_dereg) {
3642 ic_ret = ic_tx_msg(ic_session_dereg);
3643 if (ic_ret == STMF_IC_MSG_SUCCESS) {
3644 stmf_proxy_msg_id++;
3645 }
3646 }
3647 }
3648
3649 rw_enter(&ilport->ilport_lock, RW_WRITER);
3650 for (ppss = &ilport->ilport_ss_list; *ppss != NULL;
3651 ppss = &((*ppss)->iss_next)) {
3652 if (iss == (*ppss)) {
3653 *ppss = (*ppss)->iss_next;
3654 found = 1;
3655 break;
3656 }
3657 }
3658 if (!found) {
3659 cmn_err(CE_PANIC, "Deregister session called for non existent"
3660 " session");
3661 }
3662 ilport->ilport_nsessions--;
3663
3664 stmf_irport_deregister(iss->iss_irport);
3665 (void) stmf_session_destroy_lun_map(ilport, iss);
3666 rw_exit(&ilport->ilport_lock);
3667 mutex_exit(&stmf_state.stmf_lock);
3668
3669 if (iss->iss_flags & ISS_NULL_TPTID) {
3670 stmf_remote_port_free(ss->ss_rport);
3671 }
3672 }
3673
3674 stmf_i_scsi_session_t *
stmf_session_id_to_issptr(uint64_t session_id,int stay_locked)3675 stmf_session_id_to_issptr(uint64_t session_id, int stay_locked)
3676 {
3677 stmf_i_local_port_t *ilport;
3678 stmf_i_scsi_session_t *iss;
3679
3680 mutex_enter(&stmf_state.stmf_lock);
3681 for (ilport = stmf_state.stmf_ilportlist; ilport != NULL;
3682 ilport = ilport->ilport_next) {
3683 rw_enter(&ilport->ilport_lock, RW_WRITER);
3684 for (iss = ilport->ilport_ss_list; iss != NULL;
3685 iss = iss->iss_next) {
3686 if (iss->iss_ss->ss_session_id == session_id) {
3687 if (!stay_locked)
3688 rw_exit(&ilport->ilport_lock);
3689 mutex_exit(&stmf_state.stmf_lock);
3690 return (iss);
3691 }
3692 }
3693 rw_exit(&ilport->ilport_lock);
3694 }
3695 mutex_exit(&stmf_state.stmf_lock);
3696 return (NULL);
3697 }
3698
3699 void
stmf_release_itl_handle(stmf_lu_t * lu,stmf_itl_data_t * itl)3700 stmf_release_itl_handle(stmf_lu_t *lu, stmf_itl_data_t *itl)
3701 {
3702 stmf_itl_data_t **itlpp;
3703 stmf_i_lu_t *ilu;
3704
3705 ASSERT(itl->itl_flags & STMF_ITL_BEING_TERMINATED);
3706
3707 ilu = (stmf_i_lu_t *)lu->lu_stmf_private;
3708 mutex_enter(&ilu->ilu_task_lock);
3709 for (itlpp = &ilu->ilu_itl_list; (*itlpp) != NULL;
3710 itlpp = &(*itlpp)->itl_next) {
3711 if ((*itlpp) == itl)
3712 break;
3713 }
3714 ASSERT((*itlpp) != NULL);
3715 *itlpp = itl->itl_next;
3716 mutex_exit(&ilu->ilu_task_lock);
3717 lu->lu_abort(lu, STMF_LU_ITL_HANDLE_REMOVED, itl->itl_handle,
3718 (uint32_t)itl->itl_hdlrm_reason);
3719
3720 kmem_free(itl, sizeof (*itl));
3721 }
3722
3723 stmf_status_t
stmf_register_itl_handle(stmf_lu_t * lu,uint8_t * lun,stmf_scsi_session_t * ss,uint64_t session_id,void * itl_handle)3724 stmf_register_itl_handle(stmf_lu_t *lu, uint8_t *lun,
3725 stmf_scsi_session_t *ss, uint64_t session_id, void *itl_handle)
3726 {
3727 stmf_itl_data_t *itl;
3728 stmf_i_scsi_session_t *iss;
3729 stmf_lun_map_ent_t *lun_map_ent;
3730 stmf_i_lu_t *ilu;
3731 uint16_t n;
3732
3733 ilu = (stmf_i_lu_t *)lu->lu_stmf_private;
3734 if (ss == NULL) {
3735 iss = stmf_session_id_to_issptr(session_id, 1);
3736 if (iss == NULL)
3737 return (STMF_NOT_FOUND);
3738 } else {
3739 iss = (stmf_i_scsi_session_t *)ss->ss_stmf_private;
3740 }
3741
3742 mutex_enter(&stmf_state.stmf_lock);
3743 rw_enter(iss->iss_lockp, RW_WRITER);
3744 n = ((uint16_t)lun[1] | (((uint16_t)(lun[0] & 0x3F)) << 8));
3745 lun_map_ent = (stmf_lun_map_ent_t *)
3746 stmf_get_ent_from_map(iss->iss_sm, n);
3747 if ((lun_map_ent == NULL) || (lun_map_ent->ent_lu != lu)) {
3748 rw_exit(iss->iss_lockp);
3749 mutex_exit(&stmf_state.stmf_lock);
3750 return (STMF_NOT_FOUND);
3751 }
3752 if (lun_map_ent->ent_itl_datap != NULL) {
3753 rw_exit(iss->iss_lockp);
3754 mutex_exit(&stmf_state.stmf_lock);
3755 return (STMF_ALREADY);
3756 }
3757
3758 itl = (stmf_itl_data_t *)kmem_zalloc(sizeof (*itl), KM_NOSLEEP);
3759 if (itl == NULL) {
3760 rw_exit(iss->iss_lockp);
3761 mutex_exit(&stmf_state.stmf_lock);
3762 return (STMF_ALLOC_FAILURE);
3763 }
3764
3765 itl->itl_ilu = ilu;
3766 itl->itl_session = iss;
3767 itl->itl_counter = 1;
3768 itl->itl_lun = n;
3769 itl->itl_handle = itl_handle;
3770
3771 mutex_enter(&ilu->ilu_task_lock);
3772 itl->itl_next = ilu->ilu_itl_list;
3773 ilu->ilu_itl_list = itl;
3774 mutex_exit(&ilu->ilu_task_lock);
3775 lun_map_ent->ent_itl_datap = itl;
3776 rw_exit(iss->iss_lockp);
3777 mutex_exit(&stmf_state.stmf_lock);
3778
3779 return (STMF_SUCCESS);
3780 }
3781
3782 void
stmf_do_itl_dereg(stmf_lu_t * lu,stmf_itl_data_t * itl,uint8_t hdlrm_reason)3783 stmf_do_itl_dereg(stmf_lu_t *lu, stmf_itl_data_t *itl, uint8_t hdlrm_reason)
3784 {
3785 uint8_t old, new;
3786
3787 do {
3788 old = new = itl->itl_flags;
3789 if (old & STMF_ITL_BEING_TERMINATED)
3790 return;
3791 new |= STMF_ITL_BEING_TERMINATED;
3792 } while (atomic_cas_8(&itl->itl_flags, old, new) != old);
3793 itl->itl_hdlrm_reason = hdlrm_reason;
3794
3795 ASSERT(itl->itl_counter);
3796
3797 if (atomic_dec_32_nv(&itl->itl_counter))
3798 return;
3799
3800 stmf_release_itl_handle(lu, itl);
3801 }
3802
3803 stmf_status_t
stmf_deregister_all_lu_itl_handles(stmf_lu_t * lu)3804 stmf_deregister_all_lu_itl_handles(stmf_lu_t *lu)
3805 {
3806 stmf_i_lu_t *ilu;
3807 stmf_i_local_port_t *ilport;
3808 stmf_i_scsi_session_t *iss;
3809 stmf_lun_map_t *lm;
3810 stmf_lun_map_ent_t *ent;
3811 uint32_t nmaps, nu;
3812 stmf_itl_data_t **itl_list;
3813 int i;
3814
3815 ilu = (stmf_i_lu_t *)lu->lu_stmf_private;
3816
3817 dereg_itl_start:;
3818 nmaps = ilu->ilu_ref_cnt;
3819 if (nmaps == 0)
3820 return (STMF_NOT_FOUND);
3821 itl_list = (stmf_itl_data_t **)kmem_zalloc(
3822 nmaps * sizeof (stmf_itl_data_t *), KM_SLEEP);
3823 mutex_enter(&stmf_state.stmf_lock);
3824 if (nmaps != ilu->ilu_ref_cnt) {
3825 /* Something changed, start all over */
3826 mutex_exit(&stmf_state.stmf_lock);
3827 kmem_free(itl_list, nmaps * sizeof (stmf_itl_data_t *));
3828 goto dereg_itl_start;
3829 }
3830 nu = 0;
3831 for (ilport = stmf_state.stmf_ilportlist; ilport != NULL;
3832 ilport = ilport->ilport_next) {
3833 rw_enter(&ilport->ilport_lock, RW_WRITER);
3834 for (iss = ilport->ilport_ss_list; iss != NULL;
3835 iss = iss->iss_next) {
3836 lm = iss->iss_sm;
3837 if (!lm)
3838 continue;
3839 for (i = 0; i < lm->lm_nentries; i++) {
3840 if (lm->lm_plus[i] == NULL)
3841 continue;
3842 ent = (stmf_lun_map_ent_t *)lm->lm_plus[i];
3843 if ((ent->ent_lu == lu) &&
3844 (ent->ent_itl_datap)) {
3845 itl_list[nu++] = ent->ent_itl_datap;
3846 ent->ent_itl_datap = NULL;
3847 if (nu == nmaps) {
3848 rw_exit(&ilport->ilport_lock);
3849 goto dai_scan_done;
3850 }
3851 }
3852 } /* lun table for a session */
3853 } /* sessions */
3854 rw_exit(&ilport->ilport_lock);
3855 } /* ports */
3856
3857 dai_scan_done:
3858 mutex_exit(&stmf_state.stmf_lock);
3859
3860 for (i = 0; i < nu; i++) {
3861 stmf_do_itl_dereg(lu, itl_list[i],
3862 STMF_ITL_REASON_DEREG_REQUEST);
3863 }
3864 kmem_free(itl_list, nmaps * sizeof (stmf_itl_data_t *));
3865
3866 return (STMF_SUCCESS);
3867 }
3868
3869 stmf_status_t
stmf_get_itl_handle(stmf_lu_t * lu,uint8_t * lun,stmf_scsi_session_t * ss,uint64_t session_id,void ** itl_handle_retp)3870 stmf_get_itl_handle(stmf_lu_t *lu, uint8_t *lun, stmf_scsi_session_t *ss,
3871 uint64_t session_id, void **itl_handle_retp)
3872 {
3873 stmf_i_scsi_session_t *iss;
3874 stmf_lun_map_ent_t *ent;
3875 stmf_lun_map_t *lm;
3876 stmf_status_t ret;
3877 int i;
3878 uint16_t n;
3879
3880 if (ss == NULL) {
3881 iss = stmf_session_id_to_issptr(session_id, 1);
3882 if (iss == NULL)
3883 return (STMF_NOT_FOUND);
3884 } else {
3885 iss = (stmf_i_scsi_session_t *)ss->ss_stmf_private;
3886 rw_enter(iss->iss_lockp, RW_WRITER);
3887 }
3888
3889 ent = NULL;
3890 if (lun == NULL) {
3891 lm = iss->iss_sm;
3892 for (i = 0; i < lm->lm_nentries; i++) {
3893 if (lm->lm_plus[i] == NULL)
3894 continue;
3895 ent = (stmf_lun_map_ent_t *)lm->lm_plus[i];
3896 if (ent->ent_lu == lu)
3897 break;
3898 }
3899 } else {
3900 n = ((uint16_t)lun[1] | (((uint16_t)(lun[0] & 0x3F)) << 8));
3901 ent = (stmf_lun_map_ent_t *)
3902 stmf_get_ent_from_map(iss->iss_sm, n);
3903 if (lu && (ent->ent_lu != lu))
3904 ent = NULL;
3905 }
3906 if (ent && ent->ent_itl_datap) {
3907 *itl_handle_retp = ent->ent_itl_datap->itl_handle;
3908 ret = STMF_SUCCESS;
3909 } else {
3910 ret = STMF_NOT_FOUND;
3911 }
3912
3913 rw_exit(iss->iss_lockp);
3914 return (ret);
3915 }
3916
3917 stmf_data_buf_t *
stmf_alloc_dbuf(scsi_task_t * task,uint32_t size,uint32_t * pminsize,uint32_t flags)3918 stmf_alloc_dbuf(scsi_task_t *task, uint32_t size, uint32_t *pminsize,
3919 uint32_t flags)
3920 {
3921 stmf_i_scsi_task_t *itask =
3922 (stmf_i_scsi_task_t *)task->task_stmf_private;
3923 stmf_local_port_t *lport = task->task_lport;
3924 stmf_data_buf_t *dbuf;
3925 uint8_t ndx;
3926
3927 ndx = stmf_first_zero[itask->itask_allocated_buf_map];
3928 if (ndx == 0xff)
3929 return (NULL);
3930 dbuf = itask->itask_dbufs[ndx] = lport->lport_ds->ds_alloc_data_buf(
3931 task, size, pminsize, flags);
3932 if (dbuf) {
3933 task->task_cur_nbufs++;
3934 itask->itask_allocated_buf_map |= (1 << ndx);
3935 dbuf->db_flags &= ~DB_LPORT_XFER_ACTIVE;
3936 dbuf->db_handle = ndx;
3937 return (dbuf);
3938 }
3939
3940 return (NULL);
3941 }
3942
3943 stmf_status_t
stmf_setup_dbuf(scsi_task_t * task,stmf_data_buf_t * dbuf,uint32_t flags)3944 stmf_setup_dbuf(scsi_task_t *task, stmf_data_buf_t *dbuf, uint32_t flags)
3945 {
3946 stmf_i_scsi_task_t *itask =
3947 (stmf_i_scsi_task_t *)task->task_stmf_private;
3948 stmf_local_port_t *lport = task->task_lport;
3949 uint8_t ndx;
3950 stmf_status_t ret;
3951
3952 ASSERT(task->task_additional_flags & TASK_AF_ACCEPT_LU_DBUF);
3953 ASSERT(lport->lport_ds->ds_setup_dbuf != NULL);
3954 ASSERT(dbuf->db_flags & DB_LU_DATA_BUF);
3955
3956 if ((task->task_additional_flags & TASK_AF_ACCEPT_LU_DBUF) == 0)
3957 return (STMF_FAILURE);
3958 if (lport->lport_ds->ds_setup_dbuf == NULL)
3959 return (STMF_FAILURE);
3960
3961 ndx = stmf_first_zero[itask->itask_allocated_buf_map];
3962 if (ndx == 0xff)
3963 return (STMF_FAILURE);
3964 ret = lport->lport_ds->ds_setup_dbuf(task, dbuf, flags);
3965 if (ret == STMF_FAILURE)
3966 return (STMF_FAILURE);
3967 itask->itask_dbufs[ndx] = dbuf;
3968 task->task_cur_nbufs++;
3969 itask->itask_allocated_buf_map |= (1 << ndx);
3970 dbuf->db_handle = ndx;
3971
3972 return (STMF_SUCCESS);
3973 }
3974
3975 void
stmf_teardown_dbuf(scsi_task_t * task,stmf_data_buf_t * dbuf)3976 stmf_teardown_dbuf(scsi_task_t *task, stmf_data_buf_t *dbuf)
3977 {
3978 stmf_i_scsi_task_t *itask =
3979 (stmf_i_scsi_task_t *)task->task_stmf_private;
3980 stmf_local_port_t *lport = task->task_lport;
3981
3982 ASSERT(task->task_additional_flags & TASK_AF_ACCEPT_LU_DBUF);
3983 ASSERT(lport->lport_ds->ds_teardown_dbuf != NULL);
3984 ASSERT(dbuf->db_flags & DB_LU_DATA_BUF);
3985
3986 itask->itask_allocated_buf_map &= ~(1 << dbuf->db_handle);
3987 task->task_cur_nbufs--;
3988 lport->lport_ds->ds_teardown_dbuf(lport->lport_ds, dbuf);
3989 }
3990
3991 void
stmf_free_dbuf(scsi_task_t * task,stmf_data_buf_t * dbuf)3992 stmf_free_dbuf(scsi_task_t *task, stmf_data_buf_t *dbuf)
3993 {
3994 stmf_i_scsi_task_t *itask =
3995 (stmf_i_scsi_task_t *)task->task_stmf_private;
3996 stmf_local_port_t *lport = task->task_lport;
3997
3998 itask->itask_allocated_buf_map &= ~(1 << dbuf->db_handle);
3999 task->task_cur_nbufs--;
4000 lport->lport_ds->ds_free_data_buf(lport->lport_ds, dbuf);
4001 }
4002
4003 stmf_data_buf_t *
stmf_handle_to_buf(scsi_task_t * task,uint8_t h)4004 stmf_handle_to_buf(scsi_task_t *task, uint8_t h)
4005 {
4006 stmf_i_scsi_task_t *itask;
4007
4008 itask = (stmf_i_scsi_task_t *)task->task_stmf_private;
4009 if (h > 3)
4010 return (NULL);
4011 return (itask->itask_dbufs[h]);
4012 }
4013
4014 /* ARGSUSED */
4015 struct scsi_task *
stmf_task_alloc(struct stmf_local_port * lport,stmf_scsi_session_t * ss,uint8_t * lun,uint16_t cdb_length_in,uint16_t ext_id)4016 stmf_task_alloc(struct stmf_local_port *lport, stmf_scsi_session_t *ss,
4017 uint8_t *lun, uint16_t cdb_length_in, uint16_t ext_id)
4018 {
4019 stmf_lu_t *lu;
4020 stmf_i_scsi_session_t *iss;
4021 stmf_i_lu_t *ilu;
4022 stmf_i_scsi_task_t *itask;
4023 stmf_i_scsi_task_t **ppitask;
4024 scsi_task_t *task;
4025 uint8_t *l;
4026 stmf_lun_map_ent_t *lun_map_ent;
4027 uint16_t cdb_length;
4028 uint16_t luNbr;
4029 uint8_t new_task = 0;
4030
4031 /*
4032 * We allocate 7 extra bytes for CDB to provide a cdb pointer which
4033 * is guaranteed to be 8 byte aligned. Some LU providers like OSD
4034 * depend upon this alignment.
4035 */
4036 if (cdb_length_in >= 16)
4037 cdb_length = cdb_length_in + 7;
4038 else
4039 cdb_length = 16 + 7;
4040 iss = (stmf_i_scsi_session_t *)ss->ss_stmf_private;
4041 luNbr = ((uint16_t)lun[1] | (((uint16_t)(lun[0] & 0x3F)) << 8));
4042 rw_enter(iss->iss_lockp, RW_READER);
4043 lun_map_ent =
4044 (stmf_lun_map_ent_t *)stmf_get_ent_from_map(iss->iss_sm, luNbr);
4045 if (!lun_map_ent) {
4046 lu = dlun0;
4047 } else {
4048 lu = lun_map_ent->ent_lu;
4049 }
4050 ilu = lu->lu_stmf_private;
4051 if (ilu->ilu_flags & ILU_RESET_ACTIVE) {
4052 rw_exit(iss->iss_lockp);
4053 return (NULL);
4054 }
4055 ASSERT(lu == dlun0 || (ilu->ilu_state != STMF_STATE_OFFLINING &&
4056 ilu->ilu_state != STMF_STATE_OFFLINE));
4057 do {
4058 if (ilu->ilu_free_tasks == NULL) {
4059 new_task = 1;
4060 break;
4061 }
4062 mutex_enter(&ilu->ilu_task_lock);
4063 for (ppitask = &ilu->ilu_free_tasks; (*ppitask != NULL) &&
4064 ((*ppitask)->itask_cdb_buf_size < cdb_length);
4065 ppitask = &((*ppitask)->itask_lu_free_next))
4066 ;
4067 if (*ppitask) {
4068 itask = *ppitask;
4069 *ppitask = (*ppitask)->itask_lu_free_next;
4070 ilu->ilu_ntasks_free--;
4071 if (ilu->ilu_ntasks_free < ilu->ilu_ntasks_min_free)
4072 ilu->ilu_ntasks_min_free = ilu->ilu_ntasks_free;
4073 } else {
4074 new_task = 1;
4075 }
4076 mutex_exit(&ilu->ilu_task_lock);
4077 /* CONSTCOND */
4078 } while (0);
4079
4080 if (!new_task) {
4081 /*
4082 * Save the task_cdb pointer and zero per cmd fields.
4083 * We know the task_cdb_length is large enough by task
4084 * selection process above.
4085 */
4086 uint8_t *save_cdb;
4087 uintptr_t t_start, t_end;
4088
4089 task = itask->itask_task;
4090 save_cdb = task->task_cdb; /* save */
4091 t_start = (uintptr_t)&task->task_flags;
4092 t_end = (uintptr_t)&task->task_extended_cmd;
4093 bzero((void *)t_start, (size_t)(t_end - t_start));
4094 task->task_cdb = save_cdb; /* restore */
4095 itask->itask_ncmds = 0;
4096 } else {
4097 task = (scsi_task_t *)stmf_alloc(STMF_STRUCT_SCSI_TASK,
4098 cdb_length, AF_FORCE_NOSLEEP);
4099 if (task == NULL) {
4100 rw_exit(iss->iss_lockp);
4101 return (NULL);
4102 }
4103 task->task_lu = lu;
4104 l = task->task_lun_no;
4105 l[0] = lun[0];
4106 l[1] = lun[1];
4107 l[2] = lun[2];
4108 l[3] = lun[3];
4109 l[4] = lun[4];
4110 l[5] = lun[5];
4111 l[6] = lun[6];
4112 l[7] = lun[7];
4113 task->task_cdb = (uint8_t *)task->task_port_private;
4114 if ((ulong_t)(task->task_cdb) & 7ul) {
4115 task->task_cdb = (uint8_t *)(((ulong_t)
4116 (task->task_cdb) + 7ul) & ~(7ul));
4117 }
4118 itask = (stmf_i_scsi_task_t *)task->task_stmf_private;
4119 itask->itask_cdb_buf_size = cdb_length;
4120 mutex_init(&itask->itask_audit_mutex, NULL, MUTEX_DRIVER, NULL);
4121 }
4122 task->task_session = ss;
4123 task->task_lport = lport;
4124 task->task_cdb_length = cdb_length_in;
4125 itask->itask_flags = ITASK_IN_TRANSITION;
4126 itask->itask_waitq_time = 0;
4127 itask->itask_lu_read_time = itask->itask_lu_write_time = 0;
4128 itask->itask_lport_read_time = itask->itask_lport_write_time = 0;
4129 itask->itask_read_xfer = itask->itask_write_xfer = 0;
4130 itask->itask_audit_index = 0;
4131
4132 if (new_task) {
4133 if (lu->lu_task_alloc(task) != STMF_SUCCESS) {
4134 rw_exit(iss->iss_lockp);
4135 stmf_free(task);
4136 return (NULL);
4137 }
4138 mutex_enter(&ilu->ilu_task_lock);
4139 if (ilu->ilu_flags & ILU_RESET_ACTIVE) {
4140 mutex_exit(&ilu->ilu_task_lock);
4141 rw_exit(iss->iss_lockp);
4142 stmf_free(task);
4143 return (NULL);
4144 }
4145 itask->itask_lu_next = ilu->ilu_tasks;
4146 if (ilu->ilu_tasks)
4147 ilu->ilu_tasks->itask_lu_prev = itask;
4148 ilu->ilu_tasks = itask;
4149 /* kmem_zalloc automatically makes itask->itask_lu_prev NULL */
4150 ilu->ilu_ntasks++;
4151 mutex_exit(&ilu->ilu_task_lock);
4152 }
4153
4154 itask->itask_ilu_task_cntr = ilu->ilu_cur_task_cntr;
4155 atomic_inc_32(itask->itask_ilu_task_cntr);
4156 itask->itask_start_time = ddi_get_lbolt();
4157
4158 if ((lun_map_ent != NULL) && ((itask->itask_itl_datap =
4159 lun_map_ent->ent_itl_datap) != NULL)) {
4160 atomic_inc_32(&itask->itask_itl_datap->itl_counter);
4161 task->task_lu_itl_handle = itask->itask_itl_datap->itl_handle;
4162 } else {
4163 itask->itask_itl_datap = NULL;
4164 task->task_lu_itl_handle = NULL;
4165 }
4166
4167 rw_exit(iss->iss_lockp);
4168 return (task);
4169 }
4170
4171 static void
stmf_task_lu_free(scsi_task_t * task,stmf_i_scsi_session_t * iss)4172 stmf_task_lu_free(scsi_task_t *task, stmf_i_scsi_session_t *iss)
4173 {
4174 stmf_i_scsi_task_t *itask =
4175 (stmf_i_scsi_task_t *)task->task_stmf_private;
4176 stmf_i_lu_t *ilu = (stmf_i_lu_t *)task->task_lu->lu_stmf_private;
4177
4178 ASSERT(rw_lock_held(iss->iss_lockp));
4179 itask->itask_flags = ITASK_IN_FREE_LIST;
4180 itask->itask_proxy_msg_id = 0;
4181 mutex_enter(&ilu->ilu_task_lock);
4182 itask->itask_lu_free_next = ilu->ilu_free_tasks;
4183 ilu->ilu_free_tasks = itask;
4184 ilu->ilu_ntasks_free++;
4185 if (ilu->ilu_ntasks == ilu->ilu_ntasks_free)
4186 cv_signal(&ilu->ilu_offline_pending_cv);
4187 mutex_exit(&ilu->ilu_task_lock);
4188 atomic_dec_32(itask->itask_ilu_task_cntr);
4189 }
4190
4191 void
stmf_task_lu_check_freelist(stmf_i_lu_t * ilu)4192 stmf_task_lu_check_freelist(stmf_i_lu_t *ilu)
4193 {
4194 uint32_t num_to_release, ndx;
4195 stmf_i_scsi_task_t *itask;
4196 stmf_lu_t *lu = ilu->ilu_lu;
4197
4198 ASSERT(ilu->ilu_ntasks_min_free <= ilu->ilu_ntasks_free);
4199
4200 /* free half of the minimal free of the free tasks */
4201 num_to_release = (ilu->ilu_ntasks_min_free + 1) / 2;
4202 if (!num_to_release) {
4203 return;
4204 }
4205 for (ndx = 0; ndx < num_to_release; ndx++) {
4206 mutex_enter(&ilu->ilu_task_lock);
4207 itask = ilu->ilu_free_tasks;
4208 if (itask == NULL) {
4209 mutex_exit(&ilu->ilu_task_lock);
4210 break;
4211 }
4212 ilu->ilu_free_tasks = itask->itask_lu_free_next;
4213 ilu->ilu_ntasks_free--;
4214 mutex_exit(&ilu->ilu_task_lock);
4215
4216 lu->lu_task_free(itask->itask_task);
4217 mutex_enter(&ilu->ilu_task_lock);
4218 if (itask->itask_lu_next)
4219 itask->itask_lu_next->itask_lu_prev =
4220 itask->itask_lu_prev;
4221 if (itask->itask_lu_prev)
4222 itask->itask_lu_prev->itask_lu_next =
4223 itask->itask_lu_next;
4224 else
4225 ilu->ilu_tasks = itask->itask_lu_next;
4226
4227 ilu->ilu_ntasks--;
4228 mutex_exit(&ilu->ilu_task_lock);
4229 stmf_free(itask->itask_task);
4230 }
4231 }
4232
4233 /*
4234 * Called with stmf_lock held
4235 */
4236 void
stmf_check_freetask()4237 stmf_check_freetask()
4238 {
4239 stmf_i_lu_t *ilu;
4240 clock_t endtime = ddi_get_lbolt() + drv_usectohz(10000);
4241
4242 /* stmf_svc_ilu_draining may get changed after stmf_lock is released */
4243 while ((ilu = stmf_state.stmf_svc_ilu_draining) != NULL) {
4244 stmf_state.stmf_svc_ilu_draining = ilu->ilu_next;
4245 if (!ilu->ilu_ntasks_min_free) {
4246 ilu->ilu_ntasks_min_free = ilu->ilu_ntasks_free;
4247 continue;
4248 }
4249 ilu->ilu_flags |= ILU_STALL_DEREGISTER;
4250 mutex_exit(&stmf_state.stmf_lock);
4251 stmf_task_lu_check_freelist(ilu);
4252 /*
4253 * we do not care about the accuracy of
4254 * ilu_ntasks_min_free, so we don't lock here
4255 */
4256 ilu->ilu_ntasks_min_free = ilu->ilu_ntasks_free;
4257 mutex_enter(&stmf_state.stmf_lock);
4258 ilu->ilu_flags &= ~ILU_STALL_DEREGISTER;
4259 cv_broadcast(&stmf_state.stmf_cv);
4260 if (ddi_get_lbolt() >= endtime)
4261 break;
4262 }
4263 }
4264
4265 void
stmf_do_ilu_timeouts(stmf_i_lu_t * ilu)4266 stmf_do_ilu_timeouts(stmf_i_lu_t *ilu)
4267 {
4268 clock_t l = ddi_get_lbolt();
4269 clock_t ps = drv_usectohz(1000000);
4270 stmf_i_scsi_task_t *itask;
4271 scsi_task_t *task;
4272 uint32_t to;
4273
4274 mutex_enter(&ilu->ilu_task_lock);
4275 for (itask = ilu->ilu_tasks; itask != NULL;
4276 itask = itask->itask_lu_next) {
4277 if (itask->itask_flags & (ITASK_IN_FREE_LIST |
4278 ITASK_BEING_ABORTED)) {
4279 continue;
4280 }
4281 task = itask->itask_task;
4282 if (task->task_timeout == 0)
4283 to = stmf_default_task_timeout;
4284 else
4285 to = task->task_timeout;
4286 if ((itask->itask_start_time + (to * ps)) > l)
4287 continue;
4288 stmf_abort(STMF_QUEUE_TASK_ABORT, task,
4289 STMF_TIMEOUT, NULL);
4290 }
4291 mutex_exit(&ilu->ilu_task_lock);
4292 }
4293
4294 /*
4295 * Called with stmf_lock held
4296 */
4297 void
stmf_check_ilu_timing()4298 stmf_check_ilu_timing()
4299 {
4300 stmf_i_lu_t *ilu;
4301 clock_t endtime = ddi_get_lbolt() + drv_usectohz(10000);
4302
4303 /* stmf_svc_ilu_timing may get changed after stmf_lock is released */
4304 while ((ilu = stmf_state.stmf_svc_ilu_timing) != NULL) {
4305 stmf_state.stmf_svc_ilu_timing = ilu->ilu_next;
4306 if (ilu->ilu_cur_task_cntr == (&ilu->ilu_task_cntr1)) {
4307 if (ilu->ilu_task_cntr2 == 0) {
4308 ilu->ilu_cur_task_cntr = &ilu->ilu_task_cntr2;
4309 continue;
4310 }
4311 } else {
4312 if (ilu->ilu_task_cntr1 == 0) {
4313 ilu->ilu_cur_task_cntr = &ilu->ilu_task_cntr1;
4314 continue;
4315 }
4316 }
4317 /*
4318 * If we are here then it means that there is some slowdown
4319 * in tasks on this lu. We need to check.
4320 */
4321 ilu->ilu_flags |= ILU_STALL_DEREGISTER;
4322 mutex_exit(&stmf_state.stmf_lock);
4323 stmf_do_ilu_timeouts(ilu);
4324 mutex_enter(&stmf_state.stmf_lock);
4325 ilu->ilu_flags &= ~ILU_STALL_DEREGISTER;
4326 cv_broadcast(&stmf_state.stmf_cv);
4327 if (ddi_get_lbolt() >= endtime)
4328 break;
4329 }
4330 }
4331
4332 /*
4333 * Kills all tasks on a lu except tm_task
4334 */
4335 void
stmf_task_lu_killall(stmf_lu_t * lu,scsi_task_t * tm_task,stmf_status_t s)4336 stmf_task_lu_killall(stmf_lu_t *lu, scsi_task_t *tm_task, stmf_status_t s)
4337 {
4338 stmf_i_lu_t *ilu = (stmf_i_lu_t *)lu->lu_stmf_private;
4339 stmf_i_scsi_task_t *itask;
4340
4341 mutex_enter(&ilu->ilu_task_lock);
4342
4343 for (itask = ilu->ilu_tasks; itask != NULL;
4344 itask = itask->itask_lu_next) {
4345 if (itask->itask_flags & ITASK_IN_FREE_LIST)
4346 continue;
4347 if (itask->itask_task == tm_task)
4348 continue;
4349 stmf_abort(STMF_QUEUE_TASK_ABORT, itask->itask_task, s, NULL);
4350 }
4351 mutex_exit(&ilu->ilu_task_lock);
4352 }
4353
4354 void
stmf_free_task_bufs(stmf_i_scsi_task_t * itask,stmf_local_port_t * lport)4355 stmf_free_task_bufs(stmf_i_scsi_task_t *itask, stmf_local_port_t *lport)
4356 {
4357 int i;
4358 uint8_t map;
4359
4360 if ((map = itask->itask_allocated_buf_map) == 0)
4361 return;
4362 for (i = 0; i < 4; i++) {
4363 if (map & 1) {
4364 stmf_data_buf_t *dbuf;
4365
4366 dbuf = itask->itask_dbufs[i];
4367 if (dbuf->db_xfer_start_timestamp) {
4368 stmf_lport_xfer_done(itask, dbuf);
4369 }
4370 if (dbuf->db_flags & DB_LU_DATA_BUF) {
4371 /*
4372 * LU needs to clean up buffer.
4373 * LU is required to free the buffer
4374 * in the xfer_done handler.
4375 */
4376 scsi_task_t *task = itask->itask_task;
4377 stmf_lu_t *lu = task->task_lu;
4378
4379 lu->lu_dbuf_free(task, dbuf);
4380 ASSERT(((itask->itask_allocated_buf_map>>i)
4381 & 1) == 0); /* must be gone */
4382 } else {
4383 ASSERT(dbuf->db_lu_private == NULL);
4384 dbuf->db_lu_private = NULL;
4385 lport->lport_ds->ds_free_data_buf(
4386 lport->lport_ds, dbuf);
4387 }
4388 }
4389 map >>= 1;
4390 }
4391 itask->itask_allocated_buf_map = 0;
4392 }
4393
4394 void
stmf_task_free(scsi_task_t * task)4395 stmf_task_free(scsi_task_t *task)
4396 {
4397 stmf_local_port_t *lport = task->task_lport;
4398 stmf_i_scsi_task_t *itask = (stmf_i_scsi_task_t *)
4399 task->task_stmf_private;
4400 stmf_i_scsi_session_t *iss = (stmf_i_scsi_session_t *)
4401 task->task_session->ss_stmf_private;
4402
4403 stmf_task_audit(itask, TE_TASK_FREE, CMD_OR_IOF_NA, NULL);
4404
4405 stmf_free_task_bufs(itask, lport);
4406 stmf_itl_task_done(itask);
4407 DTRACE_PROBE2(stmf__task__end, scsi_task_t *, task,
4408 hrtime_t,
4409 itask->itask_done_timestamp - itask->itask_start_timestamp);
4410 if (itask->itask_itl_datap) {
4411 if (atomic_dec_32_nv(&itask->itask_itl_datap->itl_counter) ==
4412 0) {
4413 stmf_release_itl_handle(task->task_lu,
4414 itask->itask_itl_datap);
4415 }
4416 }
4417
4418 rw_enter(iss->iss_lockp, RW_READER);
4419 lport->lport_task_free(task);
4420 if (itask->itask_worker) {
4421 atomic_dec_32(&stmf_cur_ntasks);
4422 atomic_dec_32(&itask->itask_worker->worker_ref_count);
4423 }
4424 /*
4425 * After calling stmf_task_lu_free, the task pointer can no longer
4426 * be trusted.
4427 */
4428 stmf_task_lu_free(task, iss);
4429 rw_exit(iss->iss_lockp);
4430 }
4431
4432 void
stmf_post_task(scsi_task_t * task,stmf_data_buf_t * dbuf)4433 stmf_post_task(scsi_task_t *task, stmf_data_buf_t *dbuf)
4434 {
4435 stmf_i_scsi_task_t *itask = (stmf_i_scsi_task_t *)
4436 task->task_stmf_private;
4437 stmf_i_lu_t *ilu = (stmf_i_lu_t *)task->task_lu->lu_stmf_private;
4438 int nv;
4439 uint32_t old, new;
4440 uint32_t ct;
4441 stmf_worker_t *w, *w1;
4442 uint8_t tm;
4443
4444 if (task->task_max_nbufs > 4)
4445 task->task_max_nbufs = 4;
4446 task->task_cur_nbufs = 0;
4447 /* Latest value of currently running tasks */
4448 ct = atomic_inc_32_nv(&stmf_cur_ntasks);
4449
4450 /* Select the next worker using round robin */
4451 nv = (int)atomic_inc_32_nv((uint32_t *)&stmf_worker_sel_counter);
4452 if (nv >= stmf_nworkers_accepting_cmds) {
4453 int s = nv;
4454 do {
4455 nv -= stmf_nworkers_accepting_cmds;
4456 } while (nv >= stmf_nworkers_accepting_cmds);
4457 if (nv < 0)
4458 nv = 0;
4459 /* Its ok if this cas fails */
4460 (void) atomic_cas_32((uint32_t *)&stmf_worker_sel_counter,
4461 s, nv);
4462 }
4463 w = &stmf_workers[nv];
4464
4465 /*
4466 * A worker can be pinned by interrupt. So select the next one
4467 * if it has lower load.
4468 */
4469 if ((nv + 1) >= stmf_nworkers_accepting_cmds) {
4470 w1 = stmf_workers;
4471 } else {
4472 w1 = &stmf_workers[nv + 1];
4473 }
4474 if (w1->worker_queue_depth < w->worker_queue_depth)
4475 w = w1;
4476
4477 mutex_enter(&w->worker_lock);
4478 if (((w->worker_flags & STMF_WORKER_STARTED) == 0) ||
4479 (w->worker_flags & STMF_WORKER_TERMINATE)) {
4480 /*
4481 * Maybe we are in the middle of a change. Just go to
4482 * the 1st worker.
4483 */
4484 mutex_exit(&w->worker_lock);
4485 w = stmf_workers;
4486 mutex_enter(&w->worker_lock);
4487 }
4488 itask->itask_worker = w;
4489 /*
4490 * Track max system load inside the worker as we already have the
4491 * worker lock (no point implementing another lock). The service
4492 * thread will do the comparisons and figure out the max overall
4493 * system load.
4494 */
4495 if (w->worker_max_sys_qdepth_pu < ct)
4496 w->worker_max_sys_qdepth_pu = ct;
4497
4498 do {
4499 old = new = itask->itask_flags;
4500 new |= ITASK_KNOWN_TO_TGT_PORT | ITASK_IN_WORKER_QUEUE;
4501 if (task->task_mgmt_function) {
4502 tm = task->task_mgmt_function;
4503 if ((tm == TM_TARGET_RESET) ||
4504 (tm == TM_TARGET_COLD_RESET) ||
4505 (tm == TM_TARGET_WARM_RESET)) {
4506 new |= ITASK_DEFAULT_HANDLING;
4507 }
4508 } else if (task->task_cdb[0] == SCMD_REPORT_LUNS) {
4509 new |= ITASK_DEFAULT_HANDLING;
4510 }
4511 new &= ~ITASK_IN_TRANSITION;
4512 } while (atomic_cas_32(&itask->itask_flags, old, new) != old);
4513
4514 stmf_itl_task_start(itask);
4515
4516 itask->itask_worker_next = NULL;
4517 if (w->worker_task_tail) {
4518 w->worker_task_tail->itask_worker_next = itask;
4519 } else {
4520 w->worker_task_head = itask;
4521 }
4522 w->worker_task_tail = itask;
4523 if (++(w->worker_queue_depth) > w->worker_max_qdepth_pu) {
4524 w->worker_max_qdepth_pu = w->worker_queue_depth;
4525 }
4526 /* Measure task waitq time */
4527 itask->itask_waitq_enter_timestamp = gethrtime();
4528 atomic_inc_32(&w->worker_ref_count);
4529 itask->itask_cmd_stack[0] = ITASK_CMD_NEW_TASK;
4530 itask->itask_ncmds = 1;
4531 stmf_task_audit(itask, TE_TASK_START, CMD_OR_IOF_NA, dbuf);
4532 if (dbuf) {
4533 itask->itask_allocated_buf_map = 1;
4534 itask->itask_dbufs[0] = dbuf;
4535 dbuf->db_handle = 0;
4536 } else {
4537 itask->itask_allocated_buf_map = 0;
4538 itask->itask_dbufs[0] = NULL;
4539 }
4540
4541 if ((w->worker_flags & STMF_WORKER_ACTIVE) == 0) {
4542 w->worker_signal_timestamp = gethrtime();
4543 DTRACE_PROBE2(worker__signal, stmf_worker_t *, w,
4544 scsi_task_t *, task);
4545 cv_signal(&w->worker_cv);
4546 }
4547 mutex_exit(&w->worker_lock);
4548
4549 /*
4550 * This can only happen if during stmf_task_alloc(), ILU_RESET_ACTIVE
4551 * was set between checking of ILU_RESET_ACTIVE and clearing of the
4552 * ITASK_IN_FREE_LIST flag. Take care of these "sneaked-in" tasks here.
4553 */
4554 if (ilu->ilu_flags & ILU_RESET_ACTIVE) {
4555 stmf_abort(STMF_QUEUE_TASK_ABORT, task, STMF_ABORTED, NULL);
4556 }
4557 }
4558
4559 static void
stmf_task_audit(stmf_i_scsi_task_t * itask,task_audit_event_t te,uint32_t cmd_or_iof,stmf_data_buf_t * dbuf)4560 stmf_task_audit(stmf_i_scsi_task_t *itask,
4561 task_audit_event_t te, uint32_t cmd_or_iof, stmf_data_buf_t *dbuf)
4562 {
4563 stmf_task_audit_rec_t *ar;
4564
4565 mutex_enter(&itask->itask_audit_mutex);
4566 ar = &itask->itask_audit_records[itask->itask_audit_index++];
4567 itask->itask_audit_index &= (ITASK_TASK_AUDIT_DEPTH - 1);
4568 ar->ta_event = te;
4569 ar->ta_cmd_or_iof = cmd_or_iof;
4570 ar->ta_itask_flags = itask->itask_flags;
4571 ar->ta_dbuf = dbuf;
4572 gethrestime(&ar->ta_timestamp);
4573 mutex_exit(&itask->itask_audit_mutex);
4574 }
4575
4576
4577 /*
4578 * ++++++++++++++ ABORT LOGIC ++++++++++++++++++++
4579 * Once ITASK_BEING_ABORTED is set, ITASK_KNOWN_TO_LU can be reset already
4580 * i.e. before ITASK_BEING_ABORTED being set. But if it was not, it cannot
4581 * be reset until the LU explicitly calls stmf_task_lu_aborted(). Of course
4582 * the LU will make this call only if we call the LU's abort entry point.
4583 * we will only call that entry point if ITASK_KNOWN_TO_LU was set.
4584 *
4585 * Same logic applies for the port.
4586 *
4587 * Also ITASK_BEING_ABORTED will not be allowed to set if both KNOWN_TO_LU
4588 * and KNOWN_TO_TGT_PORT are reset.
4589 *
4590 * +++++++++++++++++++++++++++++++++++++++++++++++
4591 */
4592
4593 stmf_status_t
stmf_xfer_data(scsi_task_t * task,stmf_data_buf_t * dbuf,uint32_t ioflags)4594 stmf_xfer_data(scsi_task_t *task, stmf_data_buf_t *dbuf, uint32_t ioflags)
4595 {
4596 stmf_status_t ret = STMF_SUCCESS;
4597
4598 stmf_i_scsi_task_t *itask =
4599 (stmf_i_scsi_task_t *)task->task_stmf_private;
4600
4601 stmf_task_audit(itask, TE_XFER_START, ioflags, dbuf);
4602
4603 if (ioflags & STMF_IOF_LU_DONE) {
4604 uint32_t new, old;
4605 do {
4606 new = old = itask->itask_flags;
4607 if (new & ITASK_BEING_ABORTED)
4608 return (STMF_ABORTED);
4609 new &= ~ITASK_KNOWN_TO_LU;
4610 } while (atomic_cas_32(&itask->itask_flags, old, new) != old);
4611 }
4612 if (itask->itask_flags & ITASK_BEING_ABORTED)
4613 return (STMF_ABORTED);
4614 #ifdef DEBUG
4615 if (!(ioflags & STMF_IOF_STATS_ONLY) && stmf_drop_buf_counter > 0) {
4616 if (atomic_dec_32_nv(&stmf_drop_buf_counter) == 1)
4617 return (STMF_SUCCESS);
4618 }
4619 #endif
4620
4621 stmf_update_kstat_lu_io(task, dbuf);
4622 stmf_update_kstat_lport_io(task, dbuf);
4623 stmf_lport_xfer_start(itask, dbuf);
4624 if (ioflags & STMF_IOF_STATS_ONLY) {
4625 stmf_lport_xfer_done(itask, dbuf);
4626 return (STMF_SUCCESS);
4627 }
4628
4629 dbuf->db_flags |= DB_LPORT_XFER_ACTIVE;
4630 ret = task->task_lport->lport_xfer_data(task, dbuf, ioflags);
4631
4632 /*
4633 * Port provider may have already called the buffer callback in
4634 * which case dbuf->db_xfer_start_timestamp will be 0.
4635 */
4636 if (ret != STMF_SUCCESS) {
4637 dbuf->db_flags &= ~DB_LPORT_XFER_ACTIVE;
4638 if (dbuf->db_xfer_start_timestamp != 0)
4639 stmf_lport_xfer_done(itask, dbuf);
4640 }
4641
4642 return (ret);
4643 }
4644
4645 void
stmf_data_xfer_done(scsi_task_t * task,stmf_data_buf_t * dbuf,uint32_t iof)4646 stmf_data_xfer_done(scsi_task_t *task, stmf_data_buf_t *dbuf, uint32_t iof)
4647 {
4648 stmf_i_scsi_task_t *itask =
4649 (stmf_i_scsi_task_t *)task->task_stmf_private;
4650 stmf_i_local_port_t *ilport;
4651 stmf_worker_t *w = itask->itask_worker;
4652 uint32_t new, old;
4653 uint8_t update_queue_flags, free_it, queue_it;
4654
4655 stmf_lport_xfer_done(itask, dbuf);
4656
4657 stmf_task_audit(itask, TE_XFER_DONE, iof, dbuf);
4658
4659 /* Guard against unexpected completions from the lport */
4660 if (dbuf->db_flags & DB_LPORT_XFER_ACTIVE) {
4661 dbuf->db_flags &= ~DB_LPORT_XFER_ACTIVE;
4662 } else {
4663 /*
4664 * This should never happen.
4665 */
4666 ilport = task->task_lport->lport_stmf_private;
4667 ilport->ilport_unexpected_comp++;
4668 cmn_err(CE_PANIC, "Unexpected xfer completion task %p dbuf %p",
4669 (void *)task, (void *)dbuf);
4670 return;
4671 }
4672
4673 mutex_enter(&w->worker_lock);
4674 do {
4675 new = old = itask->itask_flags;
4676 if (old & ITASK_BEING_ABORTED) {
4677 mutex_exit(&w->worker_lock);
4678 return;
4679 }
4680 free_it = 0;
4681 if (iof & STMF_IOF_LPORT_DONE) {
4682 new &= ~ITASK_KNOWN_TO_TGT_PORT;
4683 task->task_completion_status = dbuf->db_xfer_status;
4684 free_it = 1;
4685 }
4686 /*
4687 * If the task is known to LU then queue it. But if
4688 * it is already queued (multiple completions) then
4689 * just update the buffer information by grabbing the
4690 * worker lock. If the task is not known to LU,
4691 * completed/aborted, then see if we need to
4692 * free this task.
4693 */
4694 if (old & ITASK_KNOWN_TO_LU) {
4695 free_it = 0;
4696 update_queue_flags = 1;
4697 if (old & ITASK_IN_WORKER_QUEUE) {
4698 queue_it = 0;
4699 } else {
4700 queue_it = 1;
4701 new |= ITASK_IN_WORKER_QUEUE;
4702 }
4703 } else {
4704 update_queue_flags = 0;
4705 queue_it = 0;
4706 }
4707 } while (atomic_cas_32(&itask->itask_flags, old, new) != old);
4708
4709 if (update_queue_flags) {
4710 uint8_t cmd = (dbuf->db_handle << 5) | ITASK_CMD_DATA_XFER_DONE;
4711
4712 ASSERT(itask->itask_ncmds < ITASK_MAX_NCMDS);
4713 itask->itask_cmd_stack[itask->itask_ncmds++] = cmd;
4714 if (queue_it) {
4715 itask->itask_worker_next = NULL;
4716 if (w->worker_task_tail) {
4717 w->worker_task_tail->itask_worker_next = itask;
4718 } else {
4719 w->worker_task_head = itask;
4720 }
4721 w->worker_task_tail = itask;
4722 /* Measure task waitq time */
4723 itask->itask_waitq_enter_timestamp = gethrtime();
4724 if (++(w->worker_queue_depth) >
4725 w->worker_max_qdepth_pu) {
4726 w->worker_max_qdepth_pu = w->worker_queue_depth;
4727 }
4728 if ((w->worker_flags & STMF_WORKER_ACTIVE) == 0)
4729 cv_signal(&w->worker_cv);
4730 }
4731 }
4732 mutex_exit(&w->worker_lock);
4733
4734 if (free_it) {
4735 if ((itask->itask_flags & (ITASK_KNOWN_TO_LU |
4736 ITASK_KNOWN_TO_TGT_PORT | ITASK_IN_WORKER_QUEUE |
4737 ITASK_BEING_ABORTED)) == 0) {
4738 stmf_task_free(task);
4739 }
4740 }
4741 }
4742
4743 stmf_status_t
stmf_send_scsi_status(scsi_task_t * task,uint32_t ioflags)4744 stmf_send_scsi_status(scsi_task_t *task, uint32_t ioflags)
4745 {
4746 DTRACE_PROBE1(scsi__send__status, scsi_task_t *, task);
4747
4748 stmf_i_scsi_task_t *itask =
4749 (stmf_i_scsi_task_t *)task->task_stmf_private;
4750
4751 stmf_task_audit(itask, TE_SEND_STATUS, ioflags, NULL);
4752
4753 if (ioflags & STMF_IOF_LU_DONE) {
4754 uint32_t new, old;
4755 do {
4756 new = old = itask->itask_flags;
4757 if (new & ITASK_BEING_ABORTED)
4758 return (STMF_ABORTED);
4759 new &= ~ITASK_KNOWN_TO_LU;
4760 } while (atomic_cas_32(&itask->itask_flags, old, new) != old);
4761 }
4762
4763 if (!(itask->itask_flags & ITASK_KNOWN_TO_TGT_PORT)) {
4764 return (STMF_SUCCESS);
4765 }
4766
4767 if (itask->itask_flags & ITASK_BEING_ABORTED)
4768 return (STMF_ABORTED);
4769
4770 if (task->task_additional_flags & TASK_AF_NO_EXPECTED_XFER_LENGTH) {
4771 task->task_status_ctrl = 0;
4772 task->task_resid = 0;
4773 } else if (task->task_cmd_xfer_length >
4774 task->task_expected_xfer_length) {
4775 task->task_status_ctrl = TASK_SCTRL_OVER;
4776 task->task_resid = task->task_cmd_xfer_length -
4777 task->task_expected_xfer_length;
4778 } else if (task->task_nbytes_transferred <
4779 task->task_expected_xfer_length) {
4780 task->task_status_ctrl = TASK_SCTRL_UNDER;
4781 task->task_resid = task->task_expected_xfer_length -
4782 task->task_nbytes_transferred;
4783 } else {
4784 task->task_status_ctrl = 0;
4785 task->task_resid = 0;
4786 }
4787 return (task->task_lport->lport_send_status(task, ioflags));
4788 }
4789
4790 void
stmf_send_status_done(scsi_task_t * task,stmf_status_t s,uint32_t iof)4791 stmf_send_status_done(scsi_task_t *task, stmf_status_t s, uint32_t iof)
4792 {
4793 stmf_i_scsi_task_t *itask =
4794 (stmf_i_scsi_task_t *)task->task_stmf_private;
4795 stmf_worker_t *w = itask->itask_worker;
4796 uint32_t new, old;
4797 uint8_t free_it, queue_it;
4798
4799 stmf_task_audit(itask, TE_SEND_STATUS_DONE, iof, NULL);
4800
4801 mutex_enter(&w->worker_lock);
4802 do {
4803 new = old = itask->itask_flags;
4804 if (old & ITASK_BEING_ABORTED) {
4805 mutex_exit(&w->worker_lock);
4806 return;
4807 }
4808 free_it = 0;
4809 if (iof & STMF_IOF_LPORT_DONE) {
4810 new &= ~ITASK_KNOWN_TO_TGT_PORT;
4811 free_it = 1;
4812 }
4813 /*
4814 * If the task is known to LU then queue it. But if
4815 * it is already queued (multiple completions) then
4816 * just update the buffer information by grabbing the
4817 * worker lock. If the task is not known to LU,
4818 * completed/aborted, then see if we need to
4819 * free this task.
4820 */
4821 if (old & ITASK_KNOWN_TO_LU) {
4822 free_it = 0;
4823 queue_it = 1;
4824 if (old & ITASK_IN_WORKER_QUEUE) {
4825 cmn_err(CE_PANIC, "status completion received"
4826 " when task is already in worker queue "
4827 " task = %p", (void *)task);
4828 }
4829 new |= ITASK_IN_WORKER_QUEUE;
4830 } else {
4831 queue_it = 0;
4832 }
4833 } while (atomic_cas_32(&itask->itask_flags, old, new) != old);
4834 task->task_completion_status = s;
4835
4836
4837 if (queue_it) {
4838 ASSERT(itask->itask_ncmds < ITASK_MAX_NCMDS);
4839 itask->itask_cmd_stack[itask->itask_ncmds++] =
4840 ITASK_CMD_STATUS_DONE;
4841 itask->itask_worker_next = NULL;
4842 if (w->worker_task_tail) {
4843 w->worker_task_tail->itask_worker_next = itask;
4844 } else {
4845 w->worker_task_head = itask;
4846 }
4847 w->worker_task_tail = itask;
4848 /* Measure task waitq time */
4849 itask->itask_waitq_enter_timestamp = gethrtime();
4850 if (++(w->worker_queue_depth) > w->worker_max_qdepth_pu) {
4851 w->worker_max_qdepth_pu = w->worker_queue_depth;
4852 }
4853 if ((w->worker_flags & STMF_WORKER_ACTIVE) == 0)
4854 cv_signal(&w->worker_cv);
4855 }
4856 mutex_exit(&w->worker_lock);
4857
4858 if (free_it) {
4859 if ((itask->itask_flags & (ITASK_KNOWN_TO_LU |
4860 ITASK_KNOWN_TO_TGT_PORT | ITASK_IN_WORKER_QUEUE |
4861 ITASK_BEING_ABORTED)) == 0) {
4862 stmf_task_free(task);
4863 } else {
4864 cmn_err(CE_PANIC, "LU is done with the task but LPORT "
4865 " is not done, itask %p itask_flags %x",
4866 (void *)itask, itask->itask_flags);
4867 }
4868 }
4869 }
4870
4871 void
stmf_task_lu_done(scsi_task_t * task)4872 stmf_task_lu_done(scsi_task_t *task)
4873 {
4874 stmf_i_scsi_task_t *itask =
4875 (stmf_i_scsi_task_t *)task->task_stmf_private;
4876 stmf_worker_t *w = itask->itask_worker;
4877 uint32_t new, old;
4878
4879 mutex_enter(&w->worker_lock);
4880 do {
4881 new = old = itask->itask_flags;
4882 if (old & ITASK_BEING_ABORTED) {
4883 mutex_exit(&w->worker_lock);
4884 return;
4885 }
4886 if (old & ITASK_IN_WORKER_QUEUE) {
4887 cmn_err(CE_PANIC, "task_lu_done received"
4888 " when task is in worker queue "
4889 " task = %p", (void *)task);
4890 }
4891 new &= ~ITASK_KNOWN_TO_LU;
4892 } while (atomic_cas_32(&itask->itask_flags, old, new) != old);
4893
4894 mutex_exit(&w->worker_lock);
4895
4896 if ((itask->itask_flags & (ITASK_KNOWN_TO_LU |
4897 ITASK_KNOWN_TO_TGT_PORT | ITASK_IN_WORKER_QUEUE |
4898 ITASK_BEING_ABORTED)) == 0) {
4899 stmf_task_free(task);
4900 } else {
4901 cmn_err(CE_PANIC, "stmf_lu_done should be the last stage but "
4902 " the task is still not done, task = %p", (void *)task);
4903 }
4904 }
4905
4906 void
stmf_queue_task_for_abort(scsi_task_t * task,stmf_status_t s)4907 stmf_queue_task_for_abort(scsi_task_t *task, stmf_status_t s)
4908 {
4909 stmf_i_scsi_task_t *itask =
4910 (stmf_i_scsi_task_t *)task->task_stmf_private;
4911 stmf_worker_t *w;
4912 uint32_t old, new;
4913
4914 stmf_task_audit(itask, TE_TASK_ABORT, CMD_OR_IOF_NA, NULL);
4915
4916 do {
4917 old = new = itask->itask_flags;
4918 if ((old & ITASK_BEING_ABORTED) ||
4919 ((old & (ITASK_KNOWN_TO_TGT_PORT |
4920 ITASK_KNOWN_TO_LU)) == 0)) {
4921 return;
4922 }
4923 new |= ITASK_BEING_ABORTED;
4924 } while (atomic_cas_32(&itask->itask_flags, old, new) != old);
4925 task->task_completion_status = s;
4926 itask->itask_start_time = ddi_get_lbolt();
4927
4928 if (((w = itask->itask_worker) == NULL) ||
4929 (itask->itask_flags & ITASK_IN_TRANSITION)) {
4930 return;
4931 }
4932
4933 /* Queue it and get out */
4934 mutex_enter(&w->worker_lock);
4935 if (itask->itask_flags & ITASK_IN_WORKER_QUEUE) {
4936 mutex_exit(&w->worker_lock);
4937 return;
4938 }
4939 atomic_or_32(&itask->itask_flags, ITASK_IN_WORKER_QUEUE);
4940 itask->itask_worker_next = NULL;
4941 if (w->worker_task_tail) {
4942 w->worker_task_tail->itask_worker_next = itask;
4943 } else {
4944 w->worker_task_head = itask;
4945 }
4946 w->worker_task_tail = itask;
4947 if (++(w->worker_queue_depth) > w->worker_max_qdepth_pu) {
4948 w->worker_max_qdepth_pu = w->worker_queue_depth;
4949 }
4950 if ((w->worker_flags & STMF_WORKER_ACTIVE) == 0)
4951 cv_signal(&w->worker_cv);
4952 mutex_exit(&w->worker_lock);
4953 }
4954
4955 void
stmf_abort(int abort_cmd,scsi_task_t * task,stmf_status_t s,void * arg)4956 stmf_abort(int abort_cmd, scsi_task_t *task, stmf_status_t s, void *arg)
4957 {
4958 stmf_i_scsi_task_t *itask = NULL;
4959 uint32_t old, new, f, rf;
4960
4961 DTRACE_PROBE2(scsi__task__abort, scsi_task_t *, task,
4962 stmf_status_t, s);
4963
4964 switch (abort_cmd) {
4965 case STMF_QUEUE_ABORT_LU:
4966 stmf_task_lu_killall((stmf_lu_t *)arg, task, s);
4967 return;
4968 case STMF_QUEUE_TASK_ABORT:
4969 stmf_queue_task_for_abort(task, s);
4970 return;
4971 case STMF_REQUEUE_TASK_ABORT_LPORT:
4972 rf = ITASK_TGT_PORT_ABORT_CALLED;
4973 f = ITASK_KNOWN_TO_TGT_PORT;
4974 break;
4975 case STMF_REQUEUE_TASK_ABORT_LU:
4976 rf = ITASK_LU_ABORT_CALLED;
4977 f = ITASK_KNOWN_TO_LU;
4978 break;
4979 default:
4980 return;
4981 }
4982 itask = (stmf_i_scsi_task_t *)task->task_stmf_private;
4983 f |= ITASK_BEING_ABORTED | rf;
4984 do {
4985 old = new = itask->itask_flags;
4986 if ((old & f) != f) {
4987 return;
4988 }
4989 new &= ~rf;
4990 } while (atomic_cas_32(&itask->itask_flags, old, new) != old);
4991 }
4992
4993 void
stmf_task_lu_aborted(scsi_task_t * task,stmf_status_t s,uint32_t iof)4994 stmf_task_lu_aborted(scsi_task_t *task, stmf_status_t s, uint32_t iof)
4995 {
4996 char info[STMF_CHANGE_INFO_LEN];
4997 stmf_i_scsi_task_t *itask = TASK_TO_ITASK(task);
4998 unsigned long long st;
4999
5000 stmf_task_audit(itask, TE_TASK_LU_ABORTED, iof, NULL);
5001
5002 st = s; /* gcc fix */
5003 if ((s != STMF_ABORT_SUCCESS) && (s != STMF_NOT_FOUND)) {
5004 (void) snprintf(info, sizeof (info),
5005 "task %p, lu failed to abort ret=%llx", (void *)task, st);
5006 } else if ((iof & STMF_IOF_LU_DONE) == 0) {
5007 (void) snprintf(info, sizeof (info),
5008 "Task aborted but LU is not finished, task ="
5009 "%p, s=%llx, iof=%x", (void *)task, st, iof);
5010 } else {
5011 /*
5012 * LU abort successfully
5013 */
5014 atomic_and_32(&itask->itask_flags, ~ITASK_KNOWN_TO_LU);
5015 return;
5016 }
5017
5018 stmf_abort_task_offline(task, 1, info);
5019 }
5020
5021 void
stmf_task_lport_aborted(scsi_task_t * task,stmf_status_t s,uint32_t iof)5022 stmf_task_lport_aborted(scsi_task_t *task, stmf_status_t s, uint32_t iof)
5023 {
5024 char info[STMF_CHANGE_INFO_LEN];
5025 stmf_i_scsi_task_t *itask = TASK_TO_ITASK(task);
5026 unsigned long long st;
5027 uint32_t old, new;
5028
5029 stmf_task_audit(itask, TE_TASK_LPORT_ABORTED, iof, NULL);
5030
5031 st = s;
5032 if ((s != STMF_ABORT_SUCCESS) && (s != STMF_NOT_FOUND)) {
5033 (void) snprintf(info, sizeof (info),
5034 "task %p, tgt port failed to abort ret=%llx", (void *)task,
5035 st);
5036 } else if ((iof & STMF_IOF_LPORT_DONE) == 0) {
5037 (void) snprintf(info, sizeof (info),
5038 "Task aborted but tgt port is not finished, "
5039 "task=%p, s=%llx, iof=%x", (void *)task, st, iof);
5040 } else {
5041 /*
5042 * LPORT abort successfully
5043 */
5044 do {
5045 old = new = itask->itask_flags;
5046 if (!(old & ITASK_KNOWN_TO_TGT_PORT))
5047 return;
5048 new &= ~ITASK_KNOWN_TO_TGT_PORT;
5049 } while (atomic_cas_32(&itask->itask_flags, old, new) != old);
5050 return;
5051 }
5052
5053 stmf_abort_task_offline(task, 0, info);
5054 }
5055
5056 stmf_status_t
stmf_task_poll_lu(scsi_task_t * task,uint32_t timeout)5057 stmf_task_poll_lu(scsi_task_t *task, uint32_t timeout)
5058 {
5059 stmf_i_scsi_task_t *itask = (stmf_i_scsi_task_t *)
5060 task->task_stmf_private;
5061 stmf_worker_t *w = itask->itask_worker;
5062 int i;
5063
5064 ASSERT(itask->itask_flags & ITASK_KNOWN_TO_LU);
5065 mutex_enter(&w->worker_lock);
5066 if (itask->itask_ncmds >= ITASK_MAX_NCMDS) {
5067 mutex_exit(&w->worker_lock);
5068 return (STMF_BUSY);
5069 }
5070 for (i = 0; i < itask->itask_ncmds; i++) {
5071 if (itask->itask_cmd_stack[i] == ITASK_CMD_POLL_LU) {
5072 mutex_exit(&w->worker_lock);
5073 return (STMF_SUCCESS);
5074 }
5075 }
5076 itask->itask_cmd_stack[itask->itask_ncmds++] = ITASK_CMD_POLL_LU;
5077 if (timeout == ITASK_DEFAULT_POLL_TIMEOUT) {
5078 itask->itask_poll_timeout = ddi_get_lbolt() + 1;
5079 } else {
5080 clock_t t = drv_usectohz(timeout * 1000);
5081 if (t == 0)
5082 t = 1;
5083 itask->itask_poll_timeout = ddi_get_lbolt() + t;
5084 }
5085 if ((itask->itask_flags & ITASK_IN_WORKER_QUEUE) == 0) {
5086 itask->itask_worker_next = NULL;
5087 if (w->worker_task_tail) {
5088 w->worker_task_tail->itask_worker_next = itask;
5089 } else {
5090 w->worker_task_head = itask;
5091 }
5092 w->worker_task_tail = itask;
5093 if (++(w->worker_queue_depth) > w->worker_max_qdepth_pu) {
5094 w->worker_max_qdepth_pu = w->worker_queue_depth;
5095 }
5096 atomic_or_32(&itask->itask_flags, ITASK_IN_WORKER_QUEUE);
5097 if ((w->worker_flags & STMF_WORKER_ACTIVE) == 0)
5098 cv_signal(&w->worker_cv);
5099 }
5100 mutex_exit(&w->worker_lock);
5101 return (STMF_SUCCESS);
5102 }
5103
5104 stmf_status_t
stmf_task_poll_lport(scsi_task_t * task,uint32_t timeout)5105 stmf_task_poll_lport(scsi_task_t *task, uint32_t timeout)
5106 {
5107 stmf_i_scsi_task_t *itask = (stmf_i_scsi_task_t *)
5108 task->task_stmf_private;
5109 stmf_worker_t *w = itask->itask_worker;
5110 int i;
5111
5112 ASSERT(itask->itask_flags & ITASK_KNOWN_TO_TGT_PORT);
5113 mutex_enter(&w->worker_lock);
5114 if (itask->itask_ncmds >= ITASK_MAX_NCMDS) {
5115 mutex_exit(&w->worker_lock);
5116 return (STMF_BUSY);
5117 }
5118 for (i = 0; i < itask->itask_ncmds; i++) {
5119 if (itask->itask_cmd_stack[i] == ITASK_CMD_POLL_LPORT) {
5120 mutex_exit(&w->worker_lock);
5121 return (STMF_SUCCESS);
5122 }
5123 }
5124 itask->itask_cmd_stack[itask->itask_ncmds++] = ITASK_CMD_POLL_LPORT;
5125 if (timeout == ITASK_DEFAULT_POLL_TIMEOUT) {
5126 itask->itask_poll_timeout = ddi_get_lbolt() + 1;
5127 } else {
5128 clock_t t = drv_usectohz(timeout * 1000);
5129 if (t == 0)
5130 t = 1;
5131 itask->itask_poll_timeout = ddi_get_lbolt() + t;
5132 }
5133 if ((itask->itask_flags & ITASK_IN_WORKER_QUEUE) == 0) {
5134 itask->itask_worker_next = NULL;
5135 if (w->worker_task_tail) {
5136 w->worker_task_tail->itask_worker_next = itask;
5137 } else {
5138 w->worker_task_head = itask;
5139 }
5140 w->worker_task_tail = itask;
5141 if (++(w->worker_queue_depth) > w->worker_max_qdepth_pu) {
5142 w->worker_max_qdepth_pu = w->worker_queue_depth;
5143 }
5144 if ((w->worker_flags & STMF_WORKER_ACTIVE) == 0)
5145 cv_signal(&w->worker_cv);
5146 }
5147 mutex_exit(&w->worker_lock);
5148 return (STMF_SUCCESS);
5149 }
5150
5151 void
stmf_do_task_abort(scsi_task_t * task)5152 stmf_do_task_abort(scsi_task_t *task)
5153 {
5154 stmf_i_scsi_task_t *itask = TASK_TO_ITASK(task);
5155 stmf_lu_t *lu;
5156 stmf_local_port_t *lport;
5157 unsigned long long ret;
5158 uint32_t old, new;
5159 uint8_t call_lu_abort, call_port_abort;
5160 char info[STMF_CHANGE_INFO_LEN];
5161
5162 lu = task->task_lu;
5163 lport = task->task_lport;
5164 do {
5165 old = new = itask->itask_flags;
5166 if ((old & (ITASK_KNOWN_TO_LU | ITASK_LU_ABORT_CALLED)) ==
5167 ITASK_KNOWN_TO_LU) {
5168 new |= ITASK_LU_ABORT_CALLED;
5169 call_lu_abort = 1;
5170 } else {
5171 call_lu_abort = 0;
5172 }
5173 } while (atomic_cas_32(&itask->itask_flags, old, new) != old);
5174
5175 if (call_lu_abort) {
5176 if ((itask->itask_flags & ITASK_DEFAULT_HANDLING) == 0) {
5177 ret = lu->lu_abort(lu, STMF_LU_ABORT_TASK, task, 0);
5178 } else {
5179 ret = dlun0->lu_abort(lu, STMF_LU_ABORT_TASK, task, 0);
5180 }
5181 if ((ret == STMF_ABORT_SUCCESS) || (ret == STMF_NOT_FOUND)) {
5182 stmf_task_lu_aborted(task, ret, STMF_IOF_LU_DONE);
5183 } else if (ret == STMF_BUSY) {
5184 atomic_and_32(&itask->itask_flags,
5185 ~ITASK_LU_ABORT_CALLED);
5186 } else if (ret != STMF_SUCCESS) {
5187 (void) snprintf(info, sizeof (info),
5188 "Abort failed by LU %p, ret %llx", (void *)lu, ret);
5189 stmf_abort_task_offline(task, 1, info);
5190 }
5191 } else if (itask->itask_flags & ITASK_KNOWN_TO_LU) {
5192 if (ddi_get_lbolt() > (itask->itask_start_time +
5193 STMF_SEC2TICK(lu->lu_abort_timeout?
5194 lu->lu_abort_timeout : ITASK_DEFAULT_ABORT_TIMEOUT))) {
5195 (void) snprintf(info, sizeof (info),
5196 "lu abort timed out");
5197 stmf_abort_task_offline(itask->itask_task, 1, info);
5198 }
5199 }
5200
5201 do {
5202 old = new = itask->itask_flags;
5203 if ((old & (ITASK_KNOWN_TO_TGT_PORT |
5204 ITASK_TGT_PORT_ABORT_CALLED)) == ITASK_KNOWN_TO_TGT_PORT) {
5205 new |= ITASK_TGT_PORT_ABORT_CALLED;
5206 call_port_abort = 1;
5207 } else {
5208 call_port_abort = 0;
5209 }
5210 } while (atomic_cas_32(&itask->itask_flags, old, new) != old);
5211 if (call_port_abort) {
5212 ret = lport->lport_abort(lport, STMF_LPORT_ABORT_TASK, task, 0);
5213 if ((ret == STMF_ABORT_SUCCESS) || (ret == STMF_NOT_FOUND)) {
5214 stmf_task_lport_aborted(task, ret, STMF_IOF_LPORT_DONE);
5215 } else if (ret == STMF_BUSY) {
5216 atomic_and_32(&itask->itask_flags,
5217 ~ITASK_TGT_PORT_ABORT_CALLED);
5218 } else if (ret != STMF_SUCCESS) {
5219 (void) snprintf(info, sizeof (info),
5220 "Abort failed by tgt port %p ret %llx",
5221 (void *)lport, ret);
5222 stmf_abort_task_offline(task, 0, info);
5223 }
5224 } else if (itask->itask_flags & ITASK_KNOWN_TO_TGT_PORT) {
5225 if (ddi_get_lbolt() > (itask->itask_start_time +
5226 STMF_SEC2TICK(lport->lport_abort_timeout?
5227 lport->lport_abort_timeout :
5228 ITASK_DEFAULT_ABORT_TIMEOUT))) {
5229 (void) snprintf(info, sizeof (info),
5230 "lport abort timed out");
5231 stmf_abort_task_offline(itask->itask_task, 0, info);
5232 }
5233 }
5234 }
5235
5236 stmf_status_t
stmf_ctl(int cmd,void * obj,void * arg)5237 stmf_ctl(int cmd, void *obj, void *arg)
5238 {
5239 stmf_status_t ret;
5240 stmf_i_lu_t *ilu;
5241 stmf_i_local_port_t *ilport;
5242 stmf_state_change_info_t *ssci = (stmf_state_change_info_t *)arg;
5243
5244 mutex_enter(&stmf_state.stmf_lock);
5245 ret = STMF_INVALID_ARG;
5246 if (cmd & STMF_CMD_LU_OP) {
5247 ilu = stmf_lookup_lu((stmf_lu_t *)obj);
5248 if (ilu == NULL) {
5249 goto stmf_ctl_lock_exit;
5250 }
5251 DTRACE_PROBE3(lu__state__change,
5252 stmf_lu_t *, ilu->ilu_lu,
5253 int, cmd, stmf_state_change_info_t *, ssci);
5254 } else if (cmd & STMF_CMD_LPORT_OP) {
5255 ilport = stmf_lookup_lport((stmf_local_port_t *)obj);
5256 if (ilport == NULL) {
5257 goto stmf_ctl_lock_exit;
5258 }
5259 DTRACE_PROBE3(lport__state__change,
5260 stmf_local_port_t *, ilport->ilport_lport,
5261 int, cmd, stmf_state_change_info_t *, ssci);
5262 } else {
5263 goto stmf_ctl_lock_exit;
5264 }
5265
5266 switch (cmd) {
5267 case STMF_CMD_LU_ONLINE:
5268 switch (ilu->ilu_state) {
5269 case STMF_STATE_OFFLINE:
5270 ret = STMF_SUCCESS;
5271 break;
5272 case STMF_STATE_ONLINE:
5273 case STMF_STATE_ONLINING:
5274 ret = STMF_ALREADY;
5275 break;
5276 case STMF_STATE_OFFLINING:
5277 ret = STMF_BUSY;
5278 break;
5279 default:
5280 ret = STMF_BADSTATE;
5281 break;
5282 }
5283 if (ret != STMF_SUCCESS)
5284 goto stmf_ctl_lock_exit;
5285
5286 ilu->ilu_state = STMF_STATE_ONLINING;
5287 mutex_exit(&stmf_state.stmf_lock);
5288 stmf_svc_queue(cmd, obj, (stmf_state_change_info_t *)arg);
5289 break;
5290
5291 case STMF_CMD_LU_ONLINE_COMPLETE:
5292 if (ilu->ilu_state != STMF_STATE_ONLINING) {
5293 ret = STMF_BADSTATE;
5294 goto stmf_ctl_lock_exit;
5295 }
5296 if (((stmf_change_status_t *)arg)->st_completion_status ==
5297 STMF_SUCCESS) {
5298 ilu->ilu_state = STMF_STATE_ONLINE;
5299 mutex_exit(&stmf_state.stmf_lock);
5300 ((stmf_lu_t *)obj)->lu_ctl((stmf_lu_t *)obj,
5301 STMF_ACK_LU_ONLINE_COMPLETE, arg);
5302 mutex_enter(&stmf_state.stmf_lock);
5303 stmf_add_lu_to_active_sessions((stmf_lu_t *)obj);
5304 } else {
5305 /* XXX: should throw a meesage an record more data */
5306 ilu->ilu_state = STMF_STATE_OFFLINE;
5307 }
5308 ret = STMF_SUCCESS;
5309 goto stmf_ctl_lock_exit;
5310
5311 case STMF_CMD_LU_OFFLINE:
5312 switch (ilu->ilu_state) {
5313 case STMF_STATE_ONLINE:
5314 ret = STMF_SUCCESS;
5315 break;
5316 case STMF_STATE_OFFLINE:
5317 case STMF_STATE_OFFLINING:
5318 ret = STMF_ALREADY;
5319 break;
5320 case STMF_STATE_ONLINING:
5321 ret = STMF_BUSY;
5322 break;
5323 default:
5324 ret = STMF_BADSTATE;
5325 break;
5326 }
5327 if (ret != STMF_SUCCESS)
5328 goto stmf_ctl_lock_exit;
5329 ilu->ilu_state = STMF_STATE_OFFLINING;
5330 mutex_exit(&stmf_state.stmf_lock);
5331 stmf_svc_queue(cmd, obj, (stmf_state_change_info_t *)arg);
5332 break;
5333
5334 case STMF_CMD_LU_OFFLINE_COMPLETE:
5335 if (ilu->ilu_state != STMF_STATE_OFFLINING) {
5336 ret = STMF_BADSTATE;
5337 goto stmf_ctl_lock_exit;
5338 }
5339 if (((stmf_change_status_t *)arg)->st_completion_status ==
5340 STMF_SUCCESS) {
5341 ilu->ilu_state = STMF_STATE_OFFLINE;
5342 mutex_exit(&stmf_state.stmf_lock);
5343 ((stmf_lu_t *)obj)->lu_ctl((stmf_lu_t *)obj,
5344 STMF_ACK_LU_OFFLINE_COMPLETE, arg);
5345 mutex_enter(&stmf_state.stmf_lock);
5346 } else {
5347 ilu->ilu_state = STMF_STATE_ONLINE;
5348 stmf_add_lu_to_active_sessions((stmf_lu_t *)obj);
5349 }
5350 mutex_exit(&stmf_state.stmf_lock);
5351 break;
5352
5353 /*
5354 * LPORT_ONLINE/OFFLINE has nothing to do with link offline/online.
5355 * It's related with hardware disable/enable.
5356 */
5357 case STMF_CMD_LPORT_ONLINE:
5358 switch (ilport->ilport_state) {
5359 case STMF_STATE_OFFLINE:
5360 ret = STMF_SUCCESS;
5361 break;
5362 case STMF_STATE_ONLINE:
5363 case STMF_STATE_ONLINING:
5364 ret = STMF_ALREADY;
5365 break;
5366 case STMF_STATE_OFFLINING:
5367 ret = STMF_BUSY;
5368 break;
5369 default:
5370 ret = STMF_BADSTATE;
5371 break;
5372 }
5373 if (ret != STMF_SUCCESS)
5374 goto stmf_ctl_lock_exit;
5375
5376 /*
5377 * Only user request can recover the port from the
5378 * FORCED_OFFLINE state
5379 */
5380 if (ilport->ilport_flags & ILPORT_FORCED_OFFLINE) {
5381 if (!(ssci->st_rflags & STMF_RFLAG_USER_REQUEST)) {
5382 ret = STMF_FAILURE;
5383 goto stmf_ctl_lock_exit;
5384 }
5385 }
5386
5387 /*
5388 * Avoid too frequent request to online
5389 */
5390 if (ssci->st_rflags & STMF_RFLAG_USER_REQUEST) {
5391 ilport->ilport_online_times = 0;
5392 ilport->ilport_avg_interval = 0;
5393 }
5394 if ((ilport->ilport_avg_interval < STMF_AVG_ONLINE_INTERVAL) &&
5395 (ilport->ilport_online_times >= 4)) {
5396 ret = STMF_FAILURE;
5397 ilport->ilport_flags |= ILPORT_FORCED_OFFLINE;
5398 stmf_trace(NULL, "stmf_ctl: too frequent request to "
5399 "online the port");
5400 cmn_err(CE_WARN, "stmf_ctl: too frequent request to "
5401 "online the port, set FORCED_OFFLINE now");
5402 goto stmf_ctl_lock_exit;
5403 }
5404 if (ilport->ilport_online_times > 0) {
5405 if (ilport->ilport_online_times == 1) {
5406 ilport->ilport_avg_interval = ddi_get_lbolt() -
5407 ilport->ilport_last_online_clock;
5408 } else {
5409 ilport->ilport_avg_interval =
5410 (ilport->ilport_avg_interval +
5411 ddi_get_lbolt() -
5412 ilport->ilport_last_online_clock) >> 1;
5413 }
5414 }
5415 ilport->ilport_last_online_clock = ddi_get_lbolt();
5416 ilport->ilport_online_times++;
5417
5418 /*
5419 * Submit online service request
5420 */
5421 ilport->ilport_flags &= ~ILPORT_FORCED_OFFLINE;
5422 ilport->ilport_state = STMF_STATE_ONLINING;
5423 mutex_exit(&stmf_state.stmf_lock);
5424 stmf_svc_queue(cmd, obj, (stmf_state_change_info_t *)arg);
5425 break;
5426
5427 case STMF_CMD_LPORT_ONLINE_COMPLETE:
5428 if (ilport->ilport_state != STMF_STATE_ONLINING) {
5429 ret = STMF_BADSTATE;
5430 goto stmf_ctl_lock_exit;
5431 }
5432 if (((stmf_change_status_t *)arg)->st_completion_status ==
5433 STMF_SUCCESS) {
5434 ilport->ilport_state = STMF_STATE_ONLINE;
5435 mutex_exit(&stmf_state.stmf_lock);
5436 ((stmf_local_port_t *)obj)->lport_ctl(
5437 (stmf_local_port_t *)obj,
5438 STMF_ACK_LPORT_ONLINE_COMPLETE, arg);
5439 mutex_enter(&stmf_state.stmf_lock);
5440 } else {
5441 ilport->ilport_state = STMF_STATE_OFFLINE;
5442 }
5443 ret = STMF_SUCCESS;
5444 goto stmf_ctl_lock_exit;
5445
5446 case STMF_CMD_LPORT_OFFLINE:
5447 switch (ilport->ilport_state) {
5448 case STMF_STATE_ONLINE:
5449 ret = STMF_SUCCESS;
5450 break;
5451 case STMF_STATE_OFFLINE:
5452 case STMF_STATE_OFFLINING:
5453 ret = STMF_ALREADY;
5454 break;
5455 case STMF_STATE_ONLINING:
5456 ret = STMF_BUSY;
5457 break;
5458 default:
5459 ret = STMF_BADSTATE;
5460 break;
5461 }
5462 if (ret != STMF_SUCCESS)
5463 goto stmf_ctl_lock_exit;
5464
5465 ilport->ilport_state = STMF_STATE_OFFLINING;
5466 mutex_exit(&stmf_state.stmf_lock);
5467 stmf_svc_queue(cmd, obj, (stmf_state_change_info_t *)arg);
5468 break;
5469
5470 case STMF_CMD_LPORT_OFFLINE_COMPLETE:
5471 if (ilport->ilport_state != STMF_STATE_OFFLINING) {
5472 ret = STMF_BADSTATE;
5473 goto stmf_ctl_lock_exit;
5474 }
5475 if (((stmf_change_status_t *)arg)->st_completion_status ==
5476 STMF_SUCCESS) {
5477 ilport->ilport_state = STMF_STATE_OFFLINE;
5478 mutex_exit(&stmf_state.stmf_lock);
5479 ((stmf_local_port_t *)obj)->lport_ctl(
5480 (stmf_local_port_t *)obj,
5481 STMF_ACK_LPORT_OFFLINE_COMPLETE, arg);
5482 mutex_enter(&stmf_state.stmf_lock);
5483 } else {
5484 ilport->ilport_state = STMF_STATE_ONLINE;
5485 }
5486 mutex_exit(&stmf_state.stmf_lock);
5487 break;
5488
5489 default:
5490 cmn_err(CE_WARN, "Invalid ctl cmd received %x", cmd);
5491 ret = STMF_INVALID_ARG;
5492 goto stmf_ctl_lock_exit;
5493 }
5494
5495 return (STMF_SUCCESS);
5496
5497 stmf_ctl_lock_exit:;
5498 mutex_exit(&stmf_state.stmf_lock);
5499 return (ret);
5500 }
5501
5502 /* ARGSUSED */
5503 stmf_status_t
stmf_info_impl(uint32_t cmd,void * arg1,void * arg2,uint8_t * buf,uint32_t * bufsizep)5504 stmf_info_impl(uint32_t cmd, void *arg1, void *arg2, uint8_t *buf,
5505 uint32_t *bufsizep)
5506 {
5507 return (STMF_NOT_SUPPORTED);
5508 }
5509
5510 /* ARGSUSED */
5511 stmf_status_t
stmf_info(uint32_t cmd,void * arg1,void * arg2,uint8_t * buf,uint32_t * bufsizep)5512 stmf_info(uint32_t cmd, void *arg1, void *arg2, uint8_t *buf,
5513 uint32_t *bufsizep)
5514 {
5515 uint32_t cl = SI_GET_CLASS(cmd);
5516
5517 if (cl == SI_STMF) {
5518 return (stmf_info_impl(cmd, arg1, arg2, buf, bufsizep));
5519 }
5520 if (cl == SI_LPORT) {
5521 return (((stmf_local_port_t *)arg1)->lport_info(cmd, arg1,
5522 arg2, buf, bufsizep));
5523 } else if (cl == SI_LU) {
5524 return (((stmf_lu_t *)arg1)->lu_info(cmd, arg1, arg2, buf,
5525 bufsizep));
5526 }
5527
5528 return (STMF_NOT_SUPPORTED);
5529 }
5530
5531 /*
5532 * Used by port providers. pwwn is 8 byte wwn, sdid is the devid used by
5533 * stmf to register local ports. The ident should have 20 bytes in buffer
5534 * space to convert the wwn to "wwn.xxxxxxxxxxxxxxxx" string.
5535 */
5536 void
stmf_wwn_to_devid_desc(scsi_devid_desc_t * sdid,uint8_t * wwn,uint8_t protocol_id)5537 stmf_wwn_to_devid_desc(scsi_devid_desc_t *sdid, uint8_t *wwn,
5538 uint8_t protocol_id)
5539 {
5540 char wwn_str[20+1];
5541
5542 sdid->protocol_id = protocol_id;
5543 sdid->piv = 1;
5544 sdid->code_set = CODE_SET_ASCII;
5545 sdid->association = ID_IS_TARGET_PORT;
5546 sdid->ident_length = 20;
5547 /* Convert wwn value to "wwn.XXXXXXXXXXXXXXXX" format */
5548 (void) snprintf(wwn_str, sizeof (wwn_str),
5549 "wwn.%02X%02X%02X%02X%02X%02X%02X%02X",
5550 wwn[0], wwn[1], wwn[2], wwn[3], wwn[4], wwn[5], wwn[6], wwn[7]);
5551 bcopy(wwn_str, (char *)sdid->ident, 20);
5552 }
5553
5554
5555 stmf_xfer_data_t *
stmf_prepare_tpgs_data(uint8_t ilu_alua)5556 stmf_prepare_tpgs_data(uint8_t ilu_alua)
5557 {
5558 stmf_xfer_data_t *xd;
5559 stmf_i_local_port_t *ilport;
5560 uint8_t *p;
5561 uint32_t sz, asz, nports = 0, nports_standby = 0;
5562
5563 mutex_enter(&stmf_state.stmf_lock);
5564 /* check if any ports are standby and create second group */
5565 for (ilport = stmf_state.stmf_ilportlist; ilport;
5566 ilport = ilport->ilport_next) {
5567 if (ilport->ilport_standby == 1) {
5568 nports_standby++;
5569 } else {
5570 nports++;
5571 }
5572 }
5573
5574 /* The spec only allows for 255 ports to be reported per group */
5575 nports = min(nports, 255);
5576 nports_standby = min(nports_standby, 255);
5577 sz = (nports * 4) + 12;
5578 if (nports_standby && ilu_alua) {
5579 sz += (nports_standby * 4) + 8;
5580 }
5581 asz = sz + sizeof (*xd) - 4;
5582 xd = (stmf_xfer_data_t *)kmem_zalloc(asz, KM_NOSLEEP);
5583 if (xd == NULL) {
5584 mutex_exit(&stmf_state.stmf_lock);
5585 return (NULL);
5586 }
5587 xd->alloc_size = asz;
5588 xd->size_left = sz;
5589
5590 p = xd->buf;
5591
5592 *((uint32_t *)p) = BE_32(sz - 4);
5593 p += 4;
5594 p[0] = 0x80; /* PREF */
5595 p[1] = 5; /* AO_SUP, S_SUP */
5596 if (stmf_state.stmf_alua_node == 1) {
5597 p[3] = 1; /* Group 1 */
5598 } else {
5599 p[3] = 0; /* Group 0 */
5600 }
5601 p[7] = nports & 0xff;
5602 p += 8;
5603 for (ilport = stmf_state.stmf_ilportlist; ilport;
5604 ilport = ilport->ilport_next) {
5605 if (ilport->ilport_standby == 1) {
5606 continue;
5607 }
5608 ((uint16_t *)p)[1] = BE_16(ilport->ilport_rtpid);
5609 p += 4;
5610 }
5611 if (nports_standby && ilu_alua) {
5612 p[0] = 0x02; /* Non PREF, Standby */
5613 p[1] = 5; /* AO_SUP, S_SUP */
5614 if (stmf_state.stmf_alua_node == 1) {
5615 p[3] = 0; /* Group 0 */
5616 } else {
5617 p[3] = 1; /* Group 1 */
5618 }
5619 p[7] = nports_standby & 0xff;
5620 p += 8;
5621 for (ilport = stmf_state.stmf_ilportlist; ilport;
5622 ilport = ilport->ilport_next) {
5623 if (ilport->ilport_standby == 0) {
5624 continue;
5625 }
5626 ((uint16_t *)p)[1] = BE_16(ilport->ilport_rtpid);
5627 p += 4;
5628 }
5629 }
5630
5631 mutex_exit(&stmf_state.stmf_lock);
5632
5633 return (xd);
5634 }
5635
5636 struct scsi_devid_desc *
stmf_scsilib_get_devid_desc(uint16_t rtpid)5637 stmf_scsilib_get_devid_desc(uint16_t rtpid)
5638 {
5639 scsi_devid_desc_t *devid = NULL;
5640 stmf_i_local_port_t *ilport;
5641
5642 mutex_enter(&stmf_state.stmf_lock);
5643
5644 for (ilport = stmf_state.stmf_ilportlist; ilport;
5645 ilport = ilport->ilport_next) {
5646 if (ilport->ilport_rtpid == rtpid) {
5647 scsi_devid_desc_t *id = ilport->ilport_lport->lport_id;
5648 uint32_t id_sz = sizeof (scsi_devid_desc_t) +
5649 id->ident_length;
5650 devid = (scsi_devid_desc_t *)kmem_zalloc(id_sz,
5651 KM_NOSLEEP);
5652 if (devid != NULL) {
5653 bcopy(id, devid, id_sz);
5654 }
5655 break;
5656 }
5657 }
5658
5659 mutex_exit(&stmf_state.stmf_lock);
5660 return (devid);
5661 }
5662
5663 uint16_t
stmf_scsilib_get_lport_rtid(struct scsi_devid_desc * devid)5664 stmf_scsilib_get_lport_rtid(struct scsi_devid_desc *devid)
5665 {
5666 stmf_i_local_port_t *ilport;
5667 scsi_devid_desc_t *id;
5668 uint16_t rtpid = 0;
5669
5670 mutex_enter(&stmf_state.stmf_lock);
5671 for (ilport = stmf_state.stmf_ilportlist; ilport;
5672 ilport = ilport->ilport_next) {
5673 id = ilport->ilport_lport->lport_id;
5674 if ((devid->ident_length == id->ident_length) &&
5675 (memcmp(devid->ident, id->ident, id->ident_length) == 0)) {
5676 rtpid = ilport->ilport_rtpid;
5677 break;
5678 }
5679 }
5680 mutex_exit(&stmf_state.stmf_lock);
5681 return (rtpid);
5682 }
5683
5684 static uint16_t stmf_lu_id_gen_number = 0;
5685
5686 stmf_status_t
stmf_scsilib_uniq_lu_id(uint32_t company_id,scsi_devid_desc_t * lu_id)5687 stmf_scsilib_uniq_lu_id(uint32_t company_id, scsi_devid_desc_t *lu_id)
5688 {
5689 return (stmf_scsilib_uniq_lu_id2(company_id, 0, lu_id));
5690 }
5691
5692 stmf_status_t
stmf_scsilib_uniq_lu_id2(uint32_t company_id,uint32_t host_id,scsi_devid_desc_t * lu_id)5693 stmf_scsilib_uniq_lu_id2(uint32_t company_id, uint32_t host_id,
5694 scsi_devid_desc_t *lu_id)
5695 {
5696 uint8_t *p;
5697 struct timeval32 timestamp32;
5698 uint32_t *t = (uint32_t *)×tamp32;
5699 struct ether_addr mac;
5700 uint8_t *e = (uint8_t *)&mac;
5701 int hid = (int)host_id;
5702 uint16_t gen_number;
5703
5704 if (company_id == COMPANY_ID_NONE)
5705 company_id = COMPANY_ID_SUN;
5706
5707 if (lu_id->ident_length != 0x10)
5708 return (STMF_INVALID_ARG);
5709
5710 p = (uint8_t *)lu_id;
5711
5712 gen_number = atomic_inc_16_nv(&stmf_lu_id_gen_number);
5713
5714 p[0] = 0xf1; p[1] = 3; p[2] = 0; p[3] = 0x10;
5715 p[4] = ((company_id >> 20) & 0xf) | 0x60;
5716 p[5] = (company_id >> 12) & 0xff;
5717 p[6] = (company_id >> 4) & 0xff;
5718 p[7] = (company_id << 4) & 0xf0;
5719 if (hid == 0 && !localetheraddr((struct ether_addr *)NULL, &mac)) {
5720 hid = BE_32((int)zone_get_hostid(NULL));
5721 }
5722 if (hid != 0) {
5723 e[0] = (hid >> 24) & 0xff;
5724 e[1] = (hid >> 16) & 0xff;
5725 e[2] = (hid >> 8) & 0xff;
5726 e[3] = hid & 0xff;
5727 e[4] = e[5] = 0;
5728 }
5729 bcopy(e, p+8, 6);
5730 uniqtime32(×tamp32);
5731 *t = BE_32(*t);
5732 bcopy(t, p+14, 4);
5733 p[18] = (gen_number >> 8) & 0xff;
5734 p[19] = gen_number & 0xff;
5735
5736 return (STMF_SUCCESS);
5737 }
5738
5739 /*
5740 * saa is sense key, ASC, ASCQ
5741 */
5742 void
stmf_scsilib_send_status(scsi_task_t * task,uint8_t st,uint32_t saa)5743 stmf_scsilib_send_status(scsi_task_t *task, uint8_t st, uint32_t saa)
5744 {
5745 uint8_t sd[18];
5746 task->task_scsi_status = st;
5747 if (st == 2) {
5748 bzero(sd, 18);
5749 sd[0] = 0x70;
5750 sd[2] = (saa >> 16) & 0xf;
5751 sd[7] = 10;
5752 sd[12] = (saa >> 8) & 0xff;
5753 sd[13] = saa & 0xff;
5754 task->task_sense_data = sd;
5755 task->task_sense_length = 18;
5756 } else {
5757 task->task_sense_data = NULL;
5758 task->task_sense_length = 0;
5759 }
5760 (void) stmf_send_scsi_status(task, STMF_IOF_LU_DONE);
5761 }
5762
5763 uint32_t
stmf_scsilib_prepare_vpd_page83(scsi_task_t * task,uint8_t * page,uint32_t page_len,uint8_t byte0,uint32_t vpd_mask)5764 stmf_scsilib_prepare_vpd_page83(scsi_task_t *task, uint8_t *page,
5765 uint32_t page_len, uint8_t byte0, uint32_t vpd_mask)
5766 {
5767 uint8_t *p = NULL;
5768 uint8_t small_buf[32];
5769 uint32_t sz = 0;
5770 uint32_t n = 4;
5771 uint32_t m = 0;
5772 uint32_t last_bit = 0;
5773
5774 if (page_len < 4)
5775 return (0);
5776 if (page_len > 65535)
5777 page_len = 65535;
5778
5779 page[0] = byte0;
5780 page[1] = 0x83;
5781
5782 /* CONSTCOND */
5783 while (1) {
5784 m += sz;
5785 if (sz && (page_len > n)) {
5786 uint32_t copysz;
5787 copysz = page_len > (n + sz) ? sz : page_len - n;
5788 bcopy(p, page + n, copysz);
5789 n += copysz;
5790 }
5791 vpd_mask &= ~last_bit;
5792 if (vpd_mask == 0)
5793 break;
5794
5795 if (vpd_mask & STMF_VPD_LU_ID) {
5796 last_bit = STMF_VPD_LU_ID;
5797 sz = task->task_lu->lu_id->ident_length + 4;
5798 p = (uint8_t *)task->task_lu->lu_id;
5799 continue;
5800 } else if (vpd_mask & STMF_VPD_TARGET_ID) {
5801 last_bit = STMF_VPD_TARGET_ID;
5802 sz = task->task_lport->lport_id->ident_length + 4;
5803 p = (uint8_t *)task->task_lport->lport_id;
5804 continue;
5805 } else if (vpd_mask & STMF_VPD_TP_GROUP) {
5806 stmf_i_local_port_t *ilport;
5807 last_bit = STMF_VPD_TP_GROUP;
5808 p = small_buf;
5809 bzero(p, 8);
5810 p[0] = 1;
5811 p[1] = 0x15;
5812 p[3] = 4;
5813 ilport = (stmf_i_local_port_t *)
5814 task->task_lport->lport_stmf_private;
5815 /*
5816 * If we're in alua mode, group 1 contains all alua
5817 * participating ports and all standby ports
5818 * > 255. Otherwise, if we're in alua mode, any local
5819 * ports (non standby/pppt) are also in group 1 if the
5820 * alua node is 1. Otherwise the group is 0.
5821 */
5822 if ((stmf_state.stmf_alua_state &&
5823 (ilport->ilport_alua || ilport->ilport_standby) &&
5824 ilport->ilport_rtpid > 255) ||
5825 (stmf_state.stmf_alua_node == 1 &&
5826 ilport->ilport_standby != 1)) {
5827 p[7] = 1; /* Group 1 */
5828 }
5829 sz = 8;
5830 continue;
5831 } else if (vpd_mask & STMF_VPD_RELATIVE_TP_ID) {
5832 stmf_i_local_port_t *ilport;
5833
5834 last_bit = STMF_VPD_RELATIVE_TP_ID;
5835 p = small_buf;
5836 bzero(p, 8);
5837 p[0] = 1;
5838 p[1] = 0x14;
5839 p[3] = 4;
5840 ilport = (stmf_i_local_port_t *)
5841 task->task_lport->lport_stmf_private;
5842 p[6] = (ilport->ilport_rtpid >> 8) & 0xff;
5843 p[7] = ilport->ilport_rtpid & 0xff;
5844 sz = 8;
5845 continue;
5846 } else {
5847 cmn_err(CE_WARN, "Invalid vpd_mask");
5848 break;
5849 }
5850 }
5851
5852 page[2] = (m >> 8) & 0xff;
5853 page[3] = m & 0xff;
5854
5855 return (n);
5856 }
5857
5858 void
stmf_scsilib_handle_report_tpgs(scsi_task_t * task,stmf_data_buf_t * dbuf)5859 stmf_scsilib_handle_report_tpgs(scsi_task_t *task, stmf_data_buf_t *dbuf)
5860 {
5861 stmf_i_scsi_task_t *itask =
5862 (stmf_i_scsi_task_t *)task->task_stmf_private;
5863 stmf_i_lu_t *ilu =
5864 (stmf_i_lu_t *)task->task_lu->lu_stmf_private;
5865 stmf_xfer_data_t *xd;
5866 uint32_t sz, minsz;
5867
5868 itask->itask_flags |= ITASK_DEFAULT_HANDLING;
5869 task->task_cmd_xfer_length =
5870 ((((uint32_t)task->task_cdb[6]) << 24) |
5871 (((uint32_t)task->task_cdb[7]) << 16) |
5872 (((uint32_t)task->task_cdb[8]) << 8) |
5873 ((uint32_t)task->task_cdb[9]));
5874
5875 if (task->task_additional_flags &
5876 TASK_AF_NO_EXPECTED_XFER_LENGTH) {
5877 task->task_expected_xfer_length =
5878 task->task_cmd_xfer_length;
5879 }
5880
5881 if (task->task_cmd_xfer_length == 0) {
5882 stmf_scsilib_send_status(task, STATUS_GOOD, 0);
5883 return;
5884 }
5885 if (task->task_cmd_xfer_length < 4) {
5886 stmf_scsilib_send_status(task, STATUS_CHECK,
5887 STMF_SAA_INVALID_FIELD_IN_CDB);
5888 return;
5889 }
5890
5891 sz = min(task->task_expected_xfer_length,
5892 task->task_cmd_xfer_length);
5893
5894 xd = stmf_prepare_tpgs_data(ilu->ilu_alua);
5895
5896 if (xd == NULL) {
5897 stmf_abort(STMF_QUEUE_TASK_ABORT, task,
5898 STMF_ALLOC_FAILURE, NULL);
5899 return;
5900 }
5901
5902 sz = min(sz, xd->size_left);
5903 xd->size_left = sz;
5904 minsz = min(512, sz);
5905
5906 if (dbuf == NULL)
5907 dbuf = stmf_alloc_dbuf(task, sz, &minsz, 0);
5908 if (dbuf == NULL) {
5909 kmem_free(xd, xd->alloc_size);
5910 stmf_abort(STMF_QUEUE_TASK_ABORT, task,
5911 STMF_ALLOC_FAILURE, NULL);
5912 return;
5913 }
5914 dbuf->db_lu_private = xd;
5915 stmf_xd_to_dbuf(dbuf, 1);
5916
5917 dbuf->db_flags = DB_DIRECTION_TO_RPORT;
5918 (void) stmf_xfer_data(task, dbuf, 0);
5919
5920 }
5921
5922 void
stmf_scsilib_handle_task_mgmt(scsi_task_t * task)5923 stmf_scsilib_handle_task_mgmt(scsi_task_t *task)
5924 {
5925
5926 switch (task->task_mgmt_function) {
5927 /*
5928 * For now we will abort all I/Os on the LU in case of ABORT_TASK_SET
5929 * and ABORT_TASK. But unlike LUN_RESET we will not reset LU state
5930 * in these cases. This needs to be changed to abort only the required
5931 * set.
5932 */
5933 case TM_ABORT_TASK:
5934 case TM_ABORT_TASK_SET:
5935 case TM_CLEAR_TASK_SET:
5936 case TM_LUN_RESET:
5937 stmf_handle_lun_reset(task);
5938 /* issue the reset to the proxy node as well */
5939 if (stmf_state.stmf_alua_state == 1) {
5940 (void) stmf_proxy_scsi_cmd(task, NULL);
5941 }
5942 return;
5943 case TM_TARGET_RESET:
5944 case TM_TARGET_COLD_RESET:
5945 case TM_TARGET_WARM_RESET:
5946 stmf_handle_target_reset(task);
5947 return;
5948 default:
5949 /* We dont support this task mgmt function */
5950 stmf_scsilib_send_status(task, STATUS_CHECK,
5951 STMF_SAA_INVALID_FIELD_IN_CMD_IU);
5952 return;
5953 }
5954 }
5955
5956 void
stmf_handle_lun_reset(scsi_task_t * task)5957 stmf_handle_lun_reset(scsi_task_t *task)
5958 {
5959 stmf_i_scsi_task_t *itask;
5960 stmf_i_lu_t *ilu;
5961
5962 itask = (stmf_i_scsi_task_t *)task->task_stmf_private;
5963 ilu = (stmf_i_lu_t *)task->task_lu->lu_stmf_private;
5964
5965 /*
5966 * To sync with target reset, grab this lock. The LU is not going
5967 * anywhere as there is atleast one task pending (this task).
5968 */
5969 mutex_enter(&stmf_state.stmf_lock);
5970
5971 if (ilu->ilu_flags & ILU_RESET_ACTIVE) {
5972 mutex_exit(&stmf_state.stmf_lock);
5973 stmf_scsilib_send_status(task, STATUS_CHECK,
5974 STMF_SAA_OPERATION_IN_PROGRESS);
5975 return;
5976 }
5977 atomic_or_32(&ilu->ilu_flags, ILU_RESET_ACTIVE);
5978 mutex_exit(&stmf_state.stmf_lock);
5979
5980 /*
5981 * Mark this task as the one causing LU reset so that we know who
5982 * was responsible for setting the ILU_RESET_ACTIVE. In case this
5983 * task itself gets aborted, we will clear ILU_RESET_ACTIVE.
5984 */
5985 itask->itask_flags |= ITASK_DEFAULT_HANDLING | ITASK_CAUSING_LU_RESET;
5986
5987 /* Initiatiate abort on all commands on this LU except this one */
5988 stmf_abort(STMF_QUEUE_ABORT_LU, task, STMF_ABORTED, task->task_lu);
5989
5990 /* Start polling on this task */
5991 if (stmf_task_poll_lu(task, ITASK_DEFAULT_POLL_TIMEOUT)
5992 != STMF_SUCCESS) {
5993 stmf_abort(STMF_QUEUE_TASK_ABORT, task, STMF_ALLOC_FAILURE,
5994 NULL);
5995 return;
5996 }
5997 }
5998
5999 void
stmf_handle_target_reset(scsi_task_t * task)6000 stmf_handle_target_reset(scsi_task_t *task)
6001 {
6002 stmf_i_scsi_task_t *itask;
6003 stmf_i_lu_t *ilu;
6004 stmf_i_scsi_session_t *iss;
6005 stmf_lun_map_t *lm;
6006 stmf_lun_map_ent_t *lm_ent;
6007 int i, lf;
6008
6009 itask = (stmf_i_scsi_task_t *)task->task_stmf_private;
6010 iss = (stmf_i_scsi_session_t *)task->task_session->ss_stmf_private;
6011 ilu = (stmf_i_lu_t *)task->task_lu->lu_stmf_private;
6012
6013 /*
6014 * To sync with LUN reset, grab this lock. The session is not going
6015 * anywhere as there is atleast one task pending (this task).
6016 */
6017 mutex_enter(&stmf_state.stmf_lock);
6018
6019 /* Grab the session lock as a writer to prevent any changes in it */
6020 rw_enter(iss->iss_lockp, RW_WRITER);
6021
6022 if (iss->iss_flags & ISS_RESET_ACTIVE) {
6023 rw_exit(iss->iss_lockp);
6024 mutex_exit(&stmf_state.stmf_lock);
6025 stmf_scsilib_send_status(task, STATUS_CHECK,
6026 STMF_SAA_OPERATION_IN_PROGRESS);
6027 return;
6028 }
6029 atomic_or_32(&iss->iss_flags, ISS_RESET_ACTIVE);
6030
6031 /*
6032 * Now go through each LUN in this session and make sure all of them
6033 * can be reset.
6034 */
6035 lm = iss->iss_sm;
6036 for (i = 0, lf = 0; i < lm->lm_nentries; i++) {
6037 if (lm->lm_plus[i] == NULL)
6038 continue;
6039 lf++;
6040 lm_ent = (stmf_lun_map_ent_t *)lm->lm_plus[i];
6041 ilu = (stmf_i_lu_t *)(lm_ent->ent_lu->lu_stmf_private);
6042 if (ilu->ilu_flags & ILU_RESET_ACTIVE) {
6043 atomic_and_32(&iss->iss_flags, ~ISS_RESET_ACTIVE);
6044 rw_exit(iss->iss_lockp);
6045 mutex_exit(&stmf_state.stmf_lock);
6046 stmf_scsilib_send_status(task, STATUS_CHECK,
6047 STMF_SAA_OPERATION_IN_PROGRESS);
6048 return;
6049 }
6050 }
6051 if (lf == 0) {
6052 /* No luns in this session */
6053 atomic_and_32(&iss->iss_flags, ~ISS_RESET_ACTIVE);
6054 rw_exit(iss->iss_lockp);
6055 mutex_exit(&stmf_state.stmf_lock);
6056 stmf_scsilib_send_status(task, STATUS_GOOD, 0);
6057 return;
6058 }
6059
6060 /* ok, start the damage */
6061 itask->itask_flags |= ITASK_DEFAULT_HANDLING |
6062 ITASK_CAUSING_TARGET_RESET;
6063 for (i = 0; i < lm->lm_nentries; i++) {
6064 if (lm->lm_plus[i] == NULL)
6065 continue;
6066 lm_ent = (stmf_lun_map_ent_t *)lm->lm_plus[i];
6067 ilu = (stmf_i_lu_t *)(lm_ent->ent_lu->lu_stmf_private);
6068 atomic_or_32(&ilu->ilu_flags, ILU_RESET_ACTIVE);
6069 }
6070
6071 for (i = 0; i < lm->lm_nentries; i++) {
6072 if (lm->lm_plus[i] == NULL)
6073 continue;
6074 lm_ent = (stmf_lun_map_ent_t *)lm->lm_plus[i];
6075 stmf_abort(STMF_QUEUE_ABORT_LU, task, STMF_ABORTED,
6076 lm_ent->ent_lu);
6077 }
6078
6079 rw_exit(iss->iss_lockp);
6080 mutex_exit(&stmf_state.stmf_lock);
6081
6082 /* Start polling on this task */
6083 if (stmf_task_poll_lu(task, ITASK_DEFAULT_POLL_TIMEOUT)
6084 != STMF_SUCCESS) {
6085 stmf_abort(STMF_QUEUE_TASK_ABORT, task, STMF_ALLOC_FAILURE,
6086 NULL);
6087 return;
6088 }
6089 }
6090
6091 int
stmf_handle_cmd_during_ic(stmf_i_scsi_task_t * itask)6092 stmf_handle_cmd_during_ic(stmf_i_scsi_task_t *itask)
6093 {
6094 scsi_task_t *task = itask->itask_task;
6095 stmf_i_scsi_session_t *iss = (stmf_i_scsi_session_t *)
6096 task->task_session->ss_stmf_private;
6097
6098 rw_enter(iss->iss_lockp, RW_WRITER);
6099 if (((iss->iss_flags & ISS_LUN_INVENTORY_CHANGED) == 0) ||
6100 (task->task_cdb[0] == SCMD_INQUIRY)) {
6101 rw_exit(iss->iss_lockp);
6102 return (0);
6103 }
6104 atomic_and_32(&iss->iss_flags,
6105 ~(ISS_LUN_INVENTORY_CHANGED | ISS_GOT_INITIAL_LUNS));
6106 rw_exit(iss->iss_lockp);
6107
6108 if (task->task_cdb[0] == SCMD_REPORT_LUNS) {
6109 return (0);
6110 }
6111 stmf_scsilib_send_status(task, STATUS_CHECK,
6112 STMF_SAA_REPORT_LUN_DATA_HAS_CHANGED);
6113 return (1);
6114 }
6115
6116 void
stmf_worker_init()6117 stmf_worker_init()
6118 {
6119 uint32_t i;
6120
6121 /* Make local copy of global tunables */
6122 stmf_i_max_nworkers = stmf_max_nworkers;
6123 stmf_i_min_nworkers = stmf_min_nworkers;
6124
6125 ASSERT(stmf_workers == NULL);
6126 if (stmf_i_min_nworkers < 4) {
6127 stmf_i_min_nworkers = 4;
6128 }
6129 if (stmf_i_max_nworkers < stmf_i_min_nworkers) {
6130 stmf_i_max_nworkers = stmf_i_min_nworkers;
6131 }
6132 stmf_workers = (stmf_worker_t *)kmem_zalloc(
6133 sizeof (stmf_worker_t) * stmf_i_max_nworkers, KM_SLEEP);
6134 for (i = 0; i < stmf_i_max_nworkers; i++) {
6135 stmf_worker_t *w = &stmf_workers[i];
6136 mutex_init(&w->worker_lock, NULL, MUTEX_DRIVER, NULL);
6137 cv_init(&w->worker_cv, NULL, CV_DRIVER, NULL);
6138 }
6139 stmf_worker_mgmt_delay = drv_usectohz(20 * 1000);
6140 stmf_workers_state = STMF_WORKERS_ENABLED;
6141
6142 /* Workers will be started by stmf_worker_mgmt() */
6143
6144 /* Lets wait for atleast one worker to start */
6145 while (stmf_nworkers_cur == 0)
6146 delay(drv_usectohz(20 * 1000));
6147 stmf_worker_mgmt_delay = drv_usectohz(3 * 1000 * 1000);
6148 }
6149
6150 stmf_status_t
stmf_worker_fini()6151 stmf_worker_fini()
6152 {
6153 int i;
6154 clock_t sb;
6155
6156 if (stmf_workers_state == STMF_WORKERS_DISABLED)
6157 return (STMF_SUCCESS);
6158 ASSERT(stmf_workers);
6159 stmf_workers_state = STMF_WORKERS_DISABLED;
6160 stmf_worker_mgmt_delay = drv_usectohz(20 * 1000);
6161 cv_signal(&stmf_state.stmf_cv);
6162
6163 sb = ddi_get_lbolt() + drv_usectohz(10 * 1000 * 1000);
6164 /* Wait for all the threads to die */
6165 while (stmf_nworkers_cur != 0) {
6166 if (ddi_get_lbolt() > sb) {
6167 stmf_workers_state = STMF_WORKERS_ENABLED;
6168 return (STMF_BUSY);
6169 }
6170 delay(drv_usectohz(100 * 1000));
6171 }
6172 for (i = 0; i < stmf_i_max_nworkers; i++) {
6173 stmf_worker_t *w = &stmf_workers[i];
6174 mutex_destroy(&w->worker_lock);
6175 cv_destroy(&w->worker_cv);
6176 }
6177 kmem_free(stmf_workers, sizeof (stmf_worker_t) * stmf_i_max_nworkers);
6178 stmf_workers = NULL;
6179
6180 return (STMF_SUCCESS);
6181 }
6182
6183 void
stmf_worker_task(void * arg)6184 stmf_worker_task(void *arg)
6185 {
6186 stmf_worker_t *w;
6187 stmf_i_scsi_session_t *iss;
6188 scsi_task_t *task;
6189 stmf_i_scsi_task_t *itask;
6190 stmf_data_buf_t *dbuf;
6191 stmf_lu_t *lu;
6192 clock_t wait_timer = 0;
6193 clock_t wait_ticks, wait_delta = 0;
6194 uint32_t old, new;
6195 uint8_t curcmd;
6196 uint8_t abort_free;
6197 uint8_t wait_queue;
6198 uint8_t dec_qdepth;
6199
6200 w = (stmf_worker_t *)arg;
6201 wait_ticks = drv_usectohz(10000);
6202
6203 DTRACE_PROBE1(worker__create, stmf_worker_t, w);
6204 mutex_enter(&w->worker_lock);
6205 w->worker_flags |= STMF_WORKER_STARTED | STMF_WORKER_ACTIVE;
6206 stmf_worker_loop:;
6207 if ((w->worker_ref_count == 0) &&
6208 (w->worker_flags & STMF_WORKER_TERMINATE)) {
6209 w->worker_flags &= ~(STMF_WORKER_STARTED |
6210 STMF_WORKER_ACTIVE | STMF_WORKER_TERMINATE);
6211 w->worker_tid = NULL;
6212 mutex_exit(&w->worker_lock);
6213 DTRACE_PROBE1(worker__destroy, stmf_worker_t, w);
6214 thread_exit();
6215 }
6216 /* CONSTCOND */
6217 while (1) {
6218 dec_qdepth = 0;
6219 if (wait_timer && (ddi_get_lbolt() >= wait_timer)) {
6220 wait_timer = 0;
6221 wait_delta = 0;
6222 if (w->worker_wait_head) {
6223 ASSERT(w->worker_wait_tail);
6224 if (w->worker_task_head == NULL)
6225 w->worker_task_head =
6226 w->worker_wait_head;
6227 else
6228 w->worker_task_tail->itask_worker_next =
6229 w->worker_wait_head;
6230 w->worker_task_tail = w->worker_wait_tail;
6231 w->worker_wait_head = w->worker_wait_tail =
6232 NULL;
6233 }
6234 }
6235 if ((itask = w->worker_task_head) == NULL) {
6236 break;
6237 }
6238 task = itask->itask_task;
6239 DTRACE_PROBE2(worker__active, stmf_worker_t, w,
6240 scsi_task_t *, task);
6241 w->worker_task_head = itask->itask_worker_next;
6242 if (w->worker_task_head == NULL)
6243 w->worker_task_tail = NULL;
6244
6245 wait_queue = 0;
6246 abort_free = 0;
6247 if (itask->itask_ncmds > 0) {
6248 curcmd = itask->itask_cmd_stack[itask->itask_ncmds - 1];
6249 } else {
6250 ASSERT(itask->itask_flags & ITASK_BEING_ABORTED);
6251 }
6252 do {
6253 old = itask->itask_flags;
6254 if (old & ITASK_BEING_ABORTED) {
6255 itask->itask_ncmds = 1;
6256 curcmd = itask->itask_cmd_stack[0] =
6257 ITASK_CMD_ABORT;
6258 goto out_itask_flag_loop;
6259 } else if ((curcmd & ITASK_CMD_MASK) ==
6260 ITASK_CMD_NEW_TASK) {
6261 /*
6262 * set ITASK_KSTAT_IN_RUNQ, this flag
6263 * will not reset until task completed
6264 */
6265 new = old | ITASK_KNOWN_TO_LU |
6266 ITASK_KSTAT_IN_RUNQ;
6267 } else {
6268 goto out_itask_flag_loop;
6269 }
6270 } while (atomic_cas_32(&itask->itask_flags, old, new) != old);
6271
6272 out_itask_flag_loop:
6273
6274 /*
6275 * Decide if this task needs to go to a queue and/or if
6276 * we can decrement the itask_cmd_stack.
6277 */
6278 if (curcmd == ITASK_CMD_ABORT) {
6279 if (itask->itask_flags & (ITASK_KNOWN_TO_LU |
6280 ITASK_KNOWN_TO_TGT_PORT)) {
6281 wait_queue = 1;
6282 } else {
6283 abort_free = 1;
6284 }
6285 } else if ((curcmd & ITASK_CMD_POLL) &&
6286 (itask->itask_poll_timeout > ddi_get_lbolt())) {
6287 wait_queue = 1;
6288 }
6289
6290 if (wait_queue) {
6291 itask->itask_worker_next = NULL;
6292 if (w->worker_wait_tail) {
6293 w->worker_wait_tail->itask_worker_next = itask;
6294 } else {
6295 w->worker_wait_head = itask;
6296 }
6297 w->worker_wait_tail = itask;
6298 if (wait_timer == 0) {
6299 wait_timer = ddi_get_lbolt() + wait_ticks;
6300 wait_delta = wait_ticks;
6301 }
6302 } else if ((--(itask->itask_ncmds)) != 0) {
6303 itask->itask_worker_next = NULL;
6304 if (w->worker_task_tail) {
6305 w->worker_task_tail->itask_worker_next = itask;
6306 } else {
6307 w->worker_task_head = itask;
6308 }
6309 w->worker_task_tail = itask;
6310 } else {
6311 atomic_and_32(&itask->itask_flags,
6312 ~ITASK_IN_WORKER_QUEUE);
6313 /*
6314 * This is where the queue depth should go down by
6315 * one but we delay that on purpose to account for
6316 * the call into the provider. The actual decrement
6317 * happens after the worker has done its job.
6318 */
6319 dec_qdepth = 1;
6320 itask->itask_waitq_time +=
6321 gethrtime() - itask->itask_waitq_enter_timestamp;
6322 }
6323
6324 /* We made it here means we are going to call LU */
6325 if ((itask->itask_flags & ITASK_DEFAULT_HANDLING) == 0)
6326 lu = task->task_lu;
6327 else
6328 lu = dlun0;
6329 dbuf = itask->itask_dbufs[ITASK_CMD_BUF_NDX(curcmd)];
6330 mutex_exit(&w->worker_lock);
6331 curcmd &= ITASK_CMD_MASK;
6332 stmf_task_audit(itask, TE_PROCESS_CMD, curcmd, dbuf);
6333 switch (curcmd) {
6334 case ITASK_CMD_NEW_TASK:
6335 iss = (stmf_i_scsi_session_t *)
6336 task->task_session->ss_stmf_private;
6337 stmf_itl_lu_new_task(itask);
6338 if (iss->iss_flags & ISS_LUN_INVENTORY_CHANGED) {
6339 if (stmf_handle_cmd_during_ic(itask))
6340 break;
6341 }
6342 #ifdef DEBUG
6343 if (stmf_drop_task_counter > 0) {
6344 if (atomic_dec_32_nv(&stmf_drop_task_counter)
6345 == 1)
6346 break;
6347 }
6348 #endif
6349 DTRACE_PROBE1(scsi__task__start, scsi_task_t *, task);
6350 lu->lu_new_task(task, dbuf);
6351 break;
6352 case ITASK_CMD_DATA_XFER_DONE:
6353 lu->lu_dbuf_xfer_done(task, dbuf);
6354 break;
6355 case ITASK_CMD_STATUS_DONE:
6356 lu->lu_send_status_done(task);
6357 break;
6358 case ITASK_CMD_ABORT:
6359 if (abort_free) {
6360 stmf_task_free(task);
6361 } else {
6362 stmf_do_task_abort(task);
6363 }
6364 break;
6365 case ITASK_CMD_POLL_LU:
6366 if (!wait_queue) {
6367 lu->lu_task_poll(task);
6368 }
6369 break;
6370 case ITASK_CMD_POLL_LPORT:
6371 if (!wait_queue)
6372 task->task_lport->lport_task_poll(task);
6373 break;
6374 case ITASK_CMD_SEND_STATUS:
6375 /* case ITASK_CMD_XFER_DATA: */
6376 break;
6377 }
6378 mutex_enter(&w->worker_lock);
6379 if (dec_qdepth) {
6380 w->worker_queue_depth--;
6381 }
6382 }
6383 if ((w->worker_flags & STMF_WORKER_TERMINATE) && (wait_timer == 0)) {
6384 if (w->worker_ref_count == 0)
6385 goto stmf_worker_loop;
6386 else {
6387 wait_timer = ddi_get_lbolt() + 1;
6388 wait_delta = 1;
6389 }
6390 }
6391 w->worker_flags &= ~STMF_WORKER_ACTIVE;
6392 if (wait_timer) {
6393 DTRACE_PROBE1(worker__timed__sleep, stmf_worker_t, w);
6394 (void) cv_reltimedwait(&w->worker_cv, &w->worker_lock,
6395 wait_delta, TR_CLOCK_TICK);
6396 } else {
6397 DTRACE_PROBE1(worker__sleep, stmf_worker_t, w);
6398 cv_wait(&w->worker_cv, &w->worker_lock);
6399 }
6400 DTRACE_PROBE1(worker__wakeup, stmf_worker_t, w);
6401 w->worker_flags |= STMF_WORKER_ACTIVE;
6402 goto stmf_worker_loop;
6403 }
6404
6405 void
stmf_worker_mgmt()6406 stmf_worker_mgmt()
6407 {
6408 int i;
6409 int workers_needed;
6410 uint32_t qd;
6411 clock_t tps, d = 0;
6412 uint32_t cur_max_ntasks = 0;
6413 stmf_worker_t *w;
6414
6415 /* Check if we are trying to increase the # of threads */
6416 for (i = stmf_nworkers_cur; i < stmf_nworkers_needed; i++) {
6417 if (stmf_workers[i].worker_flags & STMF_WORKER_STARTED) {
6418 stmf_nworkers_cur++;
6419 stmf_nworkers_accepting_cmds++;
6420 } else {
6421 /* Wait for transition to complete */
6422 return;
6423 }
6424 }
6425 /* Check if we are trying to decrease the # of workers */
6426 for (i = (stmf_nworkers_cur - 1); i >= stmf_nworkers_needed; i--) {
6427 if ((stmf_workers[i].worker_flags & STMF_WORKER_STARTED) == 0) {
6428 stmf_nworkers_cur--;
6429 /*
6430 * stmf_nworkers_accepting_cmds has already been
6431 * updated by the request to reduce the # of workers.
6432 */
6433 } else {
6434 /* Wait for transition to complete */
6435 return;
6436 }
6437 }
6438 /* Check if we are being asked to quit */
6439 if (stmf_workers_state != STMF_WORKERS_ENABLED) {
6440 if (stmf_nworkers_cur) {
6441 workers_needed = 0;
6442 goto worker_mgmt_trigger_change;
6443 }
6444 return;
6445 }
6446 /* Check if we are starting */
6447 if (stmf_nworkers_cur < stmf_i_min_nworkers) {
6448 workers_needed = stmf_i_min_nworkers;
6449 goto worker_mgmt_trigger_change;
6450 }
6451
6452 tps = drv_usectohz(1 * 1000 * 1000);
6453 if ((stmf_wm_last != 0) &&
6454 ((d = ddi_get_lbolt() - stmf_wm_last) > tps)) {
6455 qd = 0;
6456 for (i = 0; i < stmf_nworkers_accepting_cmds; i++) {
6457 qd += stmf_workers[i].worker_max_qdepth_pu;
6458 stmf_workers[i].worker_max_qdepth_pu = 0;
6459 if (stmf_workers[i].worker_max_sys_qdepth_pu >
6460 cur_max_ntasks) {
6461 cur_max_ntasks =
6462 stmf_workers[i].worker_max_sys_qdepth_pu;
6463 }
6464 stmf_workers[i].worker_max_sys_qdepth_pu = 0;
6465 }
6466 }
6467 stmf_wm_last = ddi_get_lbolt();
6468 if (d <= tps) {
6469 /* still ramping up */
6470 return;
6471 }
6472 /* max qdepth cannot be more than max tasks */
6473 if (qd > cur_max_ntasks)
6474 qd = cur_max_ntasks;
6475
6476 /* See if we have more workers */
6477 if (qd < stmf_nworkers_accepting_cmds) {
6478 /*
6479 * Since we dont reduce the worker count right away, monitor
6480 * the highest load during the scale_down_delay.
6481 */
6482 if (qd > stmf_worker_scale_down_qd)
6483 stmf_worker_scale_down_qd = qd;
6484 if (stmf_worker_scale_down_timer == 0) {
6485 stmf_worker_scale_down_timer = ddi_get_lbolt() +
6486 drv_usectohz(stmf_worker_scale_down_delay *
6487 1000 * 1000);
6488 return;
6489 }
6490 if (ddi_get_lbolt() < stmf_worker_scale_down_timer) {
6491 return;
6492 }
6493 /* Its time to reduce the workers */
6494 if (stmf_worker_scale_down_qd < stmf_i_min_nworkers)
6495 stmf_worker_scale_down_qd = stmf_i_min_nworkers;
6496 if (stmf_worker_scale_down_qd > stmf_i_max_nworkers)
6497 stmf_worker_scale_down_qd = stmf_i_max_nworkers;
6498 if (stmf_worker_scale_down_qd == stmf_nworkers_cur)
6499 return;
6500 workers_needed = stmf_worker_scale_down_qd;
6501 stmf_worker_scale_down_qd = 0;
6502 goto worker_mgmt_trigger_change;
6503 }
6504 stmf_worker_scale_down_qd = 0;
6505 stmf_worker_scale_down_timer = 0;
6506 if (qd > stmf_i_max_nworkers)
6507 qd = stmf_i_max_nworkers;
6508 if (qd < stmf_i_min_nworkers)
6509 qd = stmf_i_min_nworkers;
6510 if (qd == stmf_nworkers_cur)
6511 return;
6512 workers_needed = qd;
6513 goto worker_mgmt_trigger_change;
6514
6515 /* NOTREACHED */
6516 return;
6517
6518 worker_mgmt_trigger_change:
6519 ASSERT(workers_needed != stmf_nworkers_cur);
6520 if (workers_needed > stmf_nworkers_cur) {
6521 stmf_nworkers_needed = workers_needed;
6522 for (i = stmf_nworkers_cur; i < workers_needed; i++) {
6523 w = &stmf_workers[i];
6524 w->worker_tid = thread_create(NULL, 0, stmf_worker_task,
6525 (void *)&stmf_workers[i], 0, &p0, TS_RUN,
6526 minclsyspri);
6527 }
6528 return;
6529 }
6530 /* At this point we know that we are decreasing the # of workers */
6531 stmf_nworkers_accepting_cmds = workers_needed;
6532 stmf_nworkers_needed = workers_needed;
6533 /* Signal the workers that its time to quit */
6534 for (i = (stmf_nworkers_cur - 1); i >= stmf_nworkers_needed; i--) {
6535 w = &stmf_workers[i];
6536 ASSERT(w && (w->worker_flags & STMF_WORKER_STARTED));
6537 mutex_enter(&w->worker_lock);
6538 w->worker_flags |= STMF_WORKER_TERMINATE;
6539 if ((w->worker_flags & STMF_WORKER_ACTIVE) == 0)
6540 cv_signal(&w->worker_cv);
6541 mutex_exit(&w->worker_lock);
6542 }
6543 }
6544
6545 /*
6546 * Fills out a dbuf from stmf_xfer_data_t (contained in the db_lu_private).
6547 * If all the data has been filled out, frees the xd and makes
6548 * db_lu_private NULL.
6549 */
6550 void
stmf_xd_to_dbuf(stmf_data_buf_t * dbuf,int set_rel_off)6551 stmf_xd_to_dbuf(stmf_data_buf_t *dbuf, int set_rel_off)
6552 {
6553 stmf_xfer_data_t *xd;
6554 uint8_t *p;
6555 int i;
6556 uint32_t s;
6557
6558 xd = (stmf_xfer_data_t *)dbuf->db_lu_private;
6559 dbuf->db_data_size = 0;
6560 if (set_rel_off)
6561 dbuf->db_relative_offset = xd->size_done;
6562 for (i = 0; i < dbuf->db_sglist_length; i++) {
6563 s = min(xd->size_left, dbuf->db_sglist[i].seg_length);
6564 p = &xd->buf[xd->size_done];
6565 bcopy(p, dbuf->db_sglist[i].seg_addr, s);
6566 xd->size_left -= s;
6567 xd->size_done += s;
6568 dbuf->db_data_size += s;
6569 if (xd->size_left == 0) {
6570 kmem_free(xd, xd->alloc_size);
6571 dbuf->db_lu_private = NULL;
6572 return;
6573 }
6574 }
6575 }
6576
6577 /* ARGSUSED */
6578 stmf_status_t
stmf_dlun0_task_alloc(scsi_task_t * task)6579 stmf_dlun0_task_alloc(scsi_task_t *task)
6580 {
6581 return (STMF_SUCCESS);
6582 }
6583
6584 void
stmf_dlun0_new_task(scsi_task_t * task,stmf_data_buf_t * dbuf)6585 stmf_dlun0_new_task(scsi_task_t *task, stmf_data_buf_t *dbuf)
6586 {
6587 uint8_t *cdbp = (uint8_t *)&task->task_cdb[0];
6588 stmf_i_scsi_session_t *iss;
6589 uint32_t sz, minsz;
6590 uint8_t *p;
6591 stmf_xfer_data_t *xd;
6592 uint8_t inq_page_length = 31;
6593
6594 if (task->task_mgmt_function) {
6595 stmf_scsilib_handle_task_mgmt(task);
6596 return;
6597 }
6598
6599 switch (cdbp[0]) {
6600 case SCMD_INQUIRY:
6601 /*
6602 * Basic protocol checks. In addition, only reply to
6603 * standard inquiry. Otherwise, the LU provider needs
6604 * to respond.
6605 */
6606
6607 if (cdbp[2] || (cdbp[1] & 1) || cdbp[5]) {
6608 stmf_scsilib_send_status(task, STATUS_CHECK,
6609 STMF_SAA_INVALID_FIELD_IN_CDB);
6610 return;
6611 }
6612
6613 task->task_cmd_xfer_length =
6614 (((uint32_t)cdbp[3]) << 8) | cdbp[4];
6615
6616 if (task->task_additional_flags &
6617 TASK_AF_NO_EXPECTED_XFER_LENGTH) {
6618 task->task_expected_xfer_length =
6619 task->task_cmd_xfer_length;
6620 }
6621
6622 sz = min(task->task_expected_xfer_length,
6623 min(36, task->task_cmd_xfer_length));
6624 minsz = 36;
6625
6626 if (sz == 0) {
6627 stmf_scsilib_send_status(task, STATUS_GOOD, 0);
6628 return;
6629 }
6630
6631 if (dbuf && (dbuf->db_sglist[0].seg_length < 36)) {
6632 /*
6633 * Ignore any preallocated dbuf if the size is less
6634 * than 36. It will be freed during the task_free.
6635 */
6636 dbuf = NULL;
6637 }
6638 if (dbuf == NULL)
6639 dbuf = stmf_alloc_dbuf(task, minsz, &minsz, 0);
6640 if ((dbuf == NULL) || (dbuf->db_sglist[0].seg_length < sz)) {
6641 stmf_abort(STMF_QUEUE_TASK_ABORT, task,
6642 STMF_ALLOC_FAILURE, NULL);
6643 return;
6644 }
6645 dbuf->db_lu_private = NULL;
6646
6647 p = dbuf->db_sglist[0].seg_addr;
6648
6649 /*
6650 * Standard inquiry handling only.
6651 */
6652
6653 bzero(p, inq_page_length + 5);
6654
6655 p[0] = DPQ_SUPPORTED | DTYPE_UNKNOWN;
6656 p[2] = 5;
6657 p[3] = 0x12;
6658 p[4] = inq_page_length;
6659 p[6] = 0x80;
6660
6661 (void) strncpy((char *)p+8, "SUN ", 8);
6662 (void) strncpy((char *)p+16, "COMSTAR ", 16);
6663 (void) strncpy((char *)p+32, "1.0 ", 4);
6664
6665 dbuf->db_data_size = sz;
6666 dbuf->db_relative_offset = 0;
6667 dbuf->db_flags = DB_DIRECTION_TO_RPORT;
6668 (void) stmf_xfer_data(task, dbuf, 0);
6669
6670 return;
6671
6672 case SCMD_REPORT_LUNS:
6673 task->task_cmd_xfer_length =
6674 ((((uint32_t)task->task_cdb[6]) << 24) |
6675 (((uint32_t)task->task_cdb[7]) << 16) |
6676 (((uint32_t)task->task_cdb[8]) << 8) |
6677 ((uint32_t)task->task_cdb[9]));
6678
6679 if (task->task_additional_flags &
6680 TASK_AF_NO_EXPECTED_XFER_LENGTH) {
6681 task->task_expected_xfer_length =
6682 task->task_cmd_xfer_length;
6683 }
6684
6685 sz = min(task->task_expected_xfer_length,
6686 task->task_cmd_xfer_length);
6687
6688 if (sz < 16) {
6689 stmf_scsilib_send_status(task, STATUS_CHECK,
6690 STMF_SAA_INVALID_FIELD_IN_CDB);
6691 return;
6692 }
6693
6694 iss = (stmf_i_scsi_session_t *)
6695 task->task_session->ss_stmf_private;
6696 rw_enter(iss->iss_lockp, RW_WRITER);
6697 xd = stmf_session_prepare_report_lun_data(iss->iss_sm);
6698 rw_exit(iss->iss_lockp);
6699
6700 if (xd == NULL) {
6701 stmf_abort(STMF_QUEUE_TASK_ABORT, task,
6702 STMF_ALLOC_FAILURE, NULL);
6703 return;
6704 }
6705
6706 sz = min(sz, xd->size_left);
6707 xd->size_left = sz;
6708 minsz = min(512, sz);
6709
6710 if (dbuf == NULL)
6711 dbuf = stmf_alloc_dbuf(task, sz, &minsz, 0);
6712 if (dbuf == NULL) {
6713 kmem_free(xd, xd->alloc_size);
6714 stmf_abort(STMF_QUEUE_TASK_ABORT, task,
6715 STMF_ALLOC_FAILURE, NULL);
6716 return;
6717 }
6718 dbuf->db_lu_private = xd;
6719 stmf_xd_to_dbuf(dbuf, 1);
6720
6721 atomic_and_32(&iss->iss_flags,
6722 ~(ISS_LUN_INVENTORY_CHANGED | ISS_GOT_INITIAL_LUNS));
6723 dbuf->db_flags = DB_DIRECTION_TO_RPORT;
6724 (void) stmf_xfer_data(task, dbuf, 0);
6725 return;
6726 }
6727
6728 stmf_scsilib_send_status(task, STATUS_CHECK, STMF_SAA_INVALID_OPCODE);
6729 }
6730
6731 void
stmf_dlun0_dbuf_done(scsi_task_t * task,stmf_data_buf_t * dbuf)6732 stmf_dlun0_dbuf_done(scsi_task_t *task, stmf_data_buf_t *dbuf)
6733 {
6734 stmf_i_scsi_task_t *itask =
6735 (stmf_i_scsi_task_t *)task->task_stmf_private;
6736
6737 if (dbuf->db_xfer_status != STMF_SUCCESS) {
6738 stmf_abort(STMF_QUEUE_TASK_ABORT, task,
6739 dbuf->db_xfer_status, NULL);
6740 return;
6741 }
6742 task->task_nbytes_transferred += dbuf->db_data_size;
6743 if (dbuf->db_lu_private) {
6744 /* There is more */
6745 stmf_xd_to_dbuf(dbuf, 1);
6746 (void) stmf_xfer_data(task, dbuf, 0);
6747 return;
6748 }
6749
6750 stmf_free_dbuf(task, dbuf);
6751 /*
6752 * If this is a proxy task, it will need to be completed from the
6753 * proxy port provider. This message lets pppt know that the xfer
6754 * is complete. When we receive the status from pppt, we will
6755 * then relay that status back to the lport.
6756 */
6757 if (itask->itask_flags & ITASK_PROXY_TASK) {
6758 stmf_ic_msg_t *ic_xfer_done_msg = NULL;
6759 stmf_status_t ic_ret = STMF_FAILURE;
6760 uint64_t session_msg_id;
6761 mutex_enter(&stmf_state.stmf_lock);
6762 session_msg_id = stmf_proxy_msg_id++;
6763 mutex_exit(&stmf_state.stmf_lock);
6764 /* send xfer done status to pppt */
6765 ic_xfer_done_msg = ic_scsi_data_xfer_done_msg_alloc(
6766 itask->itask_proxy_msg_id,
6767 task->task_session->ss_session_id,
6768 STMF_SUCCESS, session_msg_id);
6769 if (ic_xfer_done_msg) {
6770 ic_ret = ic_tx_msg(ic_xfer_done_msg);
6771 if (ic_ret != STMF_IC_MSG_SUCCESS) {
6772 cmn_err(CE_WARN, "unable to xmit session msg");
6773 }
6774 }
6775 /* task will be completed from pppt */
6776 return;
6777 }
6778 stmf_scsilib_send_status(task, STATUS_GOOD, 0);
6779 }
6780
6781 /* ARGSUSED */
6782 void
stmf_dlun0_status_done(scsi_task_t * task)6783 stmf_dlun0_status_done(scsi_task_t *task)
6784 {
6785 }
6786
6787 /* ARGSUSED */
6788 void
stmf_dlun0_task_free(scsi_task_t * task)6789 stmf_dlun0_task_free(scsi_task_t *task)
6790 {
6791 }
6792
6793 /* ARGSUSED */
6794 stmf_status_t
stmf_dlun0_abort(struct stmf_lu * lu,int abort_cmd,void * arg,uint32_t flags)6795 stmf_dlun0_abort(struct stmf_lu *lu, int abort_cmd, void *arg, uint32_t flags)
6796 {
6797 scsi_task_t *task = (scsi_task_t *)arg;
6798 stmf_i_scsi_task_t *itask =
6799 (stmf_i_scsi_task_t *)task->task_stmf_private;
6800 stmf_i_lu_t *ilu = (stmf_i_lu_t *)task->task_lu->lu_stmf_private;
6801 int i;
6802 uint8_t map;
6803
6804 if ((task->task_mgmt_function) && (itask->itask_flags &
6805 (ITASK_CAUSING_LU_RESET | ITASK_CAUSING_TARGET_RESET))) {
6806 switch (task->task_mgmt_function) {
6807 case TM_ABORT_TASK:
6808 case TM_ABORT_TASK_SET:
6809 case TM_CLEAR_TASK_SET:
6810 case TM_LUN_RESET:
6811 atomic_and_32(&ilu->ilu_flags, ~ILU_RESET_ACTIVE);
6812 break;
6813 case TM_TARGET_RESET:
6814 case TM_TARGET_COLD_RESET:
6815 case TM_TARGET_WARM_RESET:
6816 stmf_abort_target_reset(task);
6817 break;
6818 }
6819 return (STMF_ABORT_SUCCESS);
6820 }
6821
6822 /*
6823 * OK so its not a task mgmt. Make sure we free any xd sitting
6824 * inside any dbuf.
6825 */
6826 if ((map = itask->itask_allocated_buf_map) != 0) {
6827 for (i = 0; i < 4; i++) {
6828 if ((map & 1) &&
6829 ((itask->itask_dbufs[i])->db_lu_private)) {
6830 stmf_xfer_data_t *xd;
6831 stmf_data_buf_t *dbuf;
6832
6833 dbuf = itask->itask_dbufs[i];
6834 xd = (stmf_xfer_data_t *)dbuf->db_lu_private;
6835 dbuf->db_lu_private = NULL;
6836 kmem_free(xd, xd->alloc_size);
6837 }
6838 map >>= 1;
6839 }
6840 }
6841 return (STMF_ABORT_SUCCESS);
6842 }
6843
6844 void
stmf_dlun0_task_poll(struct scsi_task * task)6845 stmf_dlun0_task_poll(struct scsi_task *task)
6846 {
6847 /* Right now we only do this for handling task management functions */
6848 ASSERT(task->task_mgmt_function);
6849
6850 switch (task->task_mgmt_function) {
6851 case TM_ABORT_TASK:
6852 case TM_ABORT_TASK_SET:
6853 case TM_CLEAR_TASK_SET:
6854 case TM_LUN_RESET:
6855 (void) stmf_lun_reset_poll(task->task_lu, task, 0);
6856 return;
6857 case TM_TARGET_RESET:
6858 case TM_TARGET_COLD_RESET:
6859 case TM_TARGET_WARM_RESET:
6860 stmf_target_reset_poll(task);
6861 return;
6862 }
6863 }
6864
6865 /* ARGSUSED */
6866 void
stmf_dlun0_ctl(struct stmf_lu * lu,int cmd,void * arg)6867 stmf_dlun0_ctl(struct stmf_lu *lu, int cmd, void *arg)
6868 {
6869 /* This function will never be called */
6870 cmn_err(CE_WARN, "stmf_dlun0_ctl called with cmd %x", cmd);
6871 }
6872
6873 void
stmf_dlun_init()6874 stmf_dlun_init()
6875 {
6876 stmf_i_lu_t *ilu;
6877
6878 dlun0 = stmf_alloc(STMF_STRUCT_STMF_LU, 0, 0);
6879 dlun0->lu_task_alloc = stmf_dlun0_task_alloc;
6880 dlun0->lu_new_task = stmf_dlun0_new_task;
6881 dlun0->lu_dbuf_xfer_done = stmf_dlun0_dbuf_done;
6882 dlun0->lu_send_status_done = stmf_dlun0_status_done;
6883 dlun0->lu_task_free = stmf_dlun0_task_free;
6884 dlun0->lu_abort = stmf_dlun0_abort;
6885 dlun0->lu_task_poll = stmf_dlun0_task_poll;
6886 dlun0->lu_ctl = stmf_dlun0_ctl;
6887
6888 ilu = (stmf_i_lu_t *)dlun0->lu_stmf_private;
6889 ilu->ilu_cur_task_cntr = &ilu->ilu_task_cntr1;
6890 }
6891
6892 stmf_status_t
stmf_dlun_fini()6893 stmf_dlun_fini()
6894 {
6895 stmf_i_lu_t *ilu;
6896
6897 ilu = (stmf_i_lu_t *)dlun0->lu_stmf_private;
6898
6899 ASSERT(ilu->ilu_ntasks == ilu->ilu_ntasks_free);
6900 if (ilu->ilu_ntasks) {
6901 stmf_i_scsi_task_t *itask, *nitask;
6902
6903 nitask = ilu->ilu_tasks;
6904 do {
6905 itask = nitask;
6906 nitask = itask->itask_lu_next;
6907 dlun0->lu_task_free(itask->itask_task);
6908 stmf_free(itask->itask_task);
6909 } while (nitask != NULL);
6910
6911 }
6912 stmf_free(dlun0);
6913 return (STMF_SUCCESS);
6914 }
6915
6916 void
stmf_abort_target_reset(scsi_task_t * task)6917 stmf_abort_target_reset(scsi_task_t *task)
6918 {
6919 stmf_i_scsi_session_t *iss = (stmf_i_scsi_session_t *)
6920 task->task_session->ss_stmf_private;
6921 stmf_lun_map_t *lm;
6922 stmf_lun_map_ent_t *lm_ent;
6923 stmf_i_lu_t *ilu;
6924 int i;
6925
6926 rw_enter(iss->iss_lockp, RW_READER);
6927 lm = iss->iss_sm;
6928 for (i = 0; i < lm->lm_nentries; i++) {
6929 if (lm->lm_plus[i] == NULL)
6930 continue;
6931 lm_ent = (stmf_lun_map_ent_t *)lm->lm_plus[i];
6932 ilu = (stmf_i_lu_t *)lm_ent->ent_lu->lu_stmf_private;
6933 if (ilu->ilu_flags & ILU_RESET_ACTIVE) {
6934 atomic_and_32(&ilu->ilu_flags, ~ILU_RESET_ACTIVE);
6935 }
6936 }
6937 atomic_and_32(&iss->iss_flags, ~ISS_RESET_ACTIVE);
6938 rw_exit(iss->iss_lockp);
6939 }
6940
6941 /*
6942 * The return value is only used by function managing target reset.
6943 */
6944 stmf_status_t
stmf_lun_reset_poll(stmf_lu_t * lu,struct scsi_task * task,int target_reset)6945 stmf_lun_reset_poll(stmf_lu_t *lu, struct scsi_task *task, int target_reset)
6946 {
6947 stmf_i_lu_t *ilu = (stmf_i_lu_t *)lu->lu_stmf_private;
6948 int ntasks_pending;
6949
6950 ntasks_pending = ilu->ilu_ntasks - ilu->ilu_ntasks_free;
6951 /*
6952 * This function is also used during Target reset. The idea is that
6953 * once all the commands are aborted, call the LU's reset entry
6954 * point (abort entry point with a reset flag). But if this Task
6955 * mgmt is running on this LU then all the tasks cannot be aborted.
6956 * one task (this task) will still be running which is OK.
6957 */
6958 if ((ntasks_pending == 0) || ((task->task_lu == lu) &&
6959 (ntasks_pending == 1))) {
6960 stmf_status_t ret;
6961
6962 if ((task->task_mgmt_function == TM_LUN_RESET) ||
6963 (task->task_mgmt_function == TM_TARGET_RESET) ||
6964 (task->task_mgmt_function == TM_TARGET_WARM_RESET) ||
6965 (task->task_mgmt_function == TM_TARGET_COLD_RESET)) {
6966 ret = lu->lu_abort(lu, STMF_LU_RESET_STATE, task, 0);
6967 } else {
6968 ret = STMF_SUCCESS;
6969 }
6970 if (ret == STMF_SUCCESS) {
6971 atomic_and_32(&ilu->ilu_flags, ~ILU_RESET_ACTIVE);
6972 }
6973 if (target_reset) {
6974 return (ret);
6975 }
6976 if (ret == STMF_SUCCESS) {
6977 stmf_scsilib_send_status(task, STATUS_GOOD, 0);
6978 return (ret);
6979 }
6980 if (ret != STMF_BUSY) {
6981 stmf_abort(STMF_QUEUE_TASK_ABORT, task, ret, NULL);
6982 return (ret);
6983 }
6984 }
6985
6986 if (target_reset) {
6987 /* Tell target reset polling code that we are not done */
6988 return (STMF_BUSY);
6989 }
6990
6991 if (stmf_task_poll_lu(task, ITASK_DEFAULT_POLL_TIMEOUT)
6992 != STMF_SUCCESS) {
6993 stmf_abort(STMF_QUEUE_TASK_ABORT, task,
6994 STMF_ALLOC_FAILURE, NULL);
6995 return (STMF_SUCCESS);
6996 }
6997
6998 return (STMF_SUCCESS);
6999 }
7000
7001 void
stmf_target_reset_poll(struct scsi_task * task)7002 stmf_target_reset_poll(struct scsi_task *task)
7003 {
7004 stmf_i_scsi_session_t *iss = (stmf_i_scsi_session_t *)
7005 task->task_session->ss_stmf_private;
7006 stmf_lun_map_t *lm;
7007 stmf_lun_map_ent_t *lm_ent;
7008 stmf_i_lu_t *ilu;
7009 stmf_status_t ret;
7010 int i;
7011 int not_done = 0;
7012
7013 ASSERT(iss->iss_flags & ISS_RESET_ACTIVE);
7014
7015 rw_enter(iss->iss_lockp, RW_READER);
7016 lm = iss->iss_sm;
7017 for (i = 0; i < lm->lm_nentries; i++) {
7018 if (lm->lm_plus[i] == NULL)
7019 continue;
7020 lm_ent = (stmf_lun_map_ent_t *)lm->lm_plus[i];
7021 ilu = (stmf_i_lu_t *)lm_ent->ent_lu->lu_stmf_private;
7022 if (ilu->ilu_flags & ILU_RESET_ACTIVE) {
7023 rw_exit(iss->iss_lockp);
7024 ret = stmf_lun_reset_poll(lm_ent->ent_lu, task, 1);
7025 rw_enter(iss->iss_lockp, RW_READER);
7026 if (ret == STMF_SUCCESS)
7027 continue;
7028 not_done = 1;
7029 if (ret != STMF_BUSY) {
7030 rw_exit(iss->iss_lockp);
7031 stmf_abort(STMF_QUEUE_TASK_ABORT, task,
7032 STMF_ABORTED, NULL);
7033 return;
7034 }
7035 }
7036 }
7037 rw_exit(iss->iss_lockp);
7038
7039 if (not_done) {
7040 if (stmf_task_poll_lu(task, ITASK_DEFAULT_POLL_TIMEOUT)
7041 != STMF_SUCCESS) {
7042 stmf_abort(STMF_QUEUE_TASK_ABORT, task,
7043 STMF_ALLOC_FAILURE, NULL);
7044 return;
7045 }
7046 return;
7047 }
7048
7049 atomic_and_32(&iss->iss_flags, ~ISS_RESET_ACTIVE);
7050
7051 stmf_scsilib_send_status(task, STATUS_GOOD, 0);
7052 }
7053
7054 stmf_status_t
stmf_lu_add_event(stmf_lu_t * lu,int eventid)7055 stmf_lu_add_event(stmf_lu_t *lu, int eventid)
7056 {
7057 stmf_i_lu_t *ilu = (stmf_i_lu_t *)lu->lu_stmf_private;
7058
7059 if ((eventid < 0) || (eventid >= STMF_MAX_NUM_EVENTS)) {
7060 return (STMF_INVALID_ARG);
7061 }
7062
7063 STMF_EVENT_ADD(ilu->ilu_event_hdl, eventid);
7064 return (STMF_SUCCESS);
7065 }
7066
7067 stmf_status_t
stmf_lu_remove_event(stmf_lu_t * lu,int eventid)7068 stmf_lu_remove_event(stmf_lu_t *lu, int eventid)
7069 {
7070 stmf_i_lu_t *ilu = (stmf_i_lu_t *)lu->lu_stmf_private;
7071
7072 if (eventid == STMF_EVENT_ALL) {
7073 STMF_EVENT_CLEAR_ALL(ilu->ilu_event_hdl);
7074 return (STMF_SUCCESS);
7075 }
7076
7077 if ((eventid < 0) || (eventid >= STMF_MAX_NUM_EVENTS)) {
7078 return (STMF_INVALID_ARG);
7079 }
7080
7081 STMF_EVENT_REMOVE(ilu->ilu_event_hdl, eventid);
7082 return (STMF_SUCCESS);
7083 }
7084
7085 stmf_status_t
stmf_lport_add_event(stmf_local_port_t * lport,int eventid)7086 stmf_lport_add_event(stmf_local_port_t *lport, int eventid)
7087 {
7088 stmf_i_local_port_t *ilport =
7089 (stmf_i_local_port_t *)lport->lport_stmf_private;
7090
7091 if ((eventid < 0) || (eventid >= STMF_MAX_NUM_EVENTS)) {
7092 return (STMF_INVALID_ARG);
7093 }
7094
7095 STMF_EVENT_ADD(ilport->ilport_event_hdl, eventid);
7096 return (STMF_SUCCESS);
7097 }
7098
7099 stmf_status_t
stmf_lport_remove_event(stmf_local_port_t * lport,int eventid)7100 stmf_lport_remove_event(stmf_local_port_t *lport, int eventid)
7101 {
7102 stmf_i_local_port_t *ilport =
7103 (stmf_i_local_port_t *)lport->lport_stmf_private;
7104
7105 if (eventid == STMF_EVENT_ALL) {
7106 STMF_EVENT_CLEAR_ALL(ilport->ilport_event_hdl);
7107 return (STMF_SUCCESS);
7108 }
7109
7110 if ((eventid < 0) || (eventid >= STMF_MAX_NUM_EVENTS)) {
7111 return (STMF_INVALID_ARG);
7112 }
7113
7114 STMF_EVENT_REMOVE(ilport->ilport_event_hdl, eventid);
7115 return (STMF_SUCCESS);
7116 }
7117
7118 void
stmf_generate_lu_event(stmf_i_lu_t * ilu,int eventid,void * arg,uint32_t flags)7119 stmf_generate_lu_event(stmf_i_lu_t *ilu, int eventid, void *arg, uint32_t flags)
7120 {
7121 if (STMF_EVENT_ENABLED(ilu->ilu_event_hdl, eventid) &&
7122 (ilu->ilu_lu->lu_event_handler != NULL)) {
7123 ilu->ilu_lu->lu_event_handler(ilu->ilu_lu, eventid, arg, flags);
7124 }
7125 }
7126
7127 void
stmf_generate_lport_event(stmf_i_local_port_t * ilport,int eventid,void * arg,uint32_t flags)7128 stmf_generate_lport_event(stmf_i_local_port_t *ilport, int eventid, void *arg,
7129 uint32_t flags)
7130 {
7131 if (STMF_EVENT_ENABLED(ilport->ilport_event_hdl, eventid) &&
7132 (ilport->ilport_lport->lport_event_handler != NULL)) {
7133 ilport->ilport_lport->lport_event_handler(
7134 ilport->ilport_lport, eventid, arg, flags);
7135 }
7136 }
7137
7138 /*
7139 * With the possibility of having multiple itl sessions pointing to the
7140 * same itl_kstat_info, the ilu_kstat_lock mutex is used to synchronize
7141 * the kstat update of the ilu_kstat_io, itl_kstat_taskq and itl_kstat_lu_xfer
7142 * statistics.
7143 */
7144 void
stmf_itl_task_start(stmf_i_scsi_task_t * itask)7145 stmf_itl_task_start(stmf_i_scsi_task_t *itask)
7146 {
7147 stmf_itl_data_t *itl = itask->itask_itl_datap;
7148 scsi_task_t *task = itask->itask_task;
7149 stmf_i_lu_t *ilu;
7150
7151 if (itl == NULL || task->task_lu == dlun0)
7152 return;
7153 ilu = (stmf_i_lu_t *)task->task_lu->lu_stmf_private;
7154 itask->itask_start_timestamp = gethrtime();
7155 if (ilu->ilu_kstat_io != NULL) {
7156 mutex_enter(ilu->ilu_kstat_io->ks_lock);
7157 stmf_update_kstat_lu_q(itask->itask_task, kstat_waitq_enter);
7158 mutex_exit(ilu->ilu_kstat_io->ks_lock);
7159 }
7160
7161 stmf_update_kstat_lport_q(itask->itask_task, kstat_waitq_enter);
7162 }
7163
7164 void
stmf_itl_lu_new_task(stmf_i_scsi_task_t * itask)7165 stmf_itl_lu_new_task(stmf_i_scsi_task_t *itask)
7166 {
7167 stmf_itl_data_t *itl = itask->itask_itl_datap;
7168 scsi_task_t *task = itask->itask_task;
7169 stmf_i_lu_t *ilu;
7170
7171 if (itl == NULL || task->task_lu == dlun0)
7172 return;
7173 ilu = (stmf_i_lu_t *)task->task_lu->lu_stmf_private;
7174 if (ilu->ilu_kstat_io != NULL) {
7175 mutex_enter(ilu->ilu_kstat_io->ks_lock);
7176 stmf_update_kstat_lu_q(itask->itask_task, kstat_waitq_to_runq);
7177 mutex_exit(ilu->ilu_kstat_io->ks_lock);
7178 }
7179
7180 stmf_update_kstat_lport_q(itask->itask_task, kstat_waitq_to_runq);
7181 }
7182
7183 void
stmf_itl_task_done(stmf_i_scsi_task_t * itask)7184 stmf_itl_task_done(stmf_i_scsi_task_t *itask)
7185 {
7186 stmf_itl_data_t *itl = itask->itask_itl_datap;
7187 scsi_task_t *task = itask->itask_task;
7188 stmf_i_lu_t *ilu;
7189
7190 itask->itask_done_timestamp = gethrtime();
7191
7192 if (itl == NULL || task->task_lu == dlun0)
7193 return;
7194 ilu = (stmf_i_lu_t *)task->task_lu->lu_stmf_private;
7195
7196 if (ilu->ilu_kstat_io == NULL)
7197 return;
7198
7199 mutex_enter(ilu->ilu_kstat_io->ks_lock);
7200
7201 if (itask->itask_flags & ITASK_KSTAT_IN_RUNQ) {
7202 stmf_update_kstat_lu_q(task, kstat_runq_exit);
7203 mutex_exit(ilu->ilu_kstat_io->ks_lock);
7204 stmf_update_kstat_lport_q(task, kstat_runq_exit);
7205 } else {
7206 stmf_update_kstat_lu_q(task, kstat_waitq_exit);
7207 mutex_exit(ilu->ilu_kstat_io->ks_lock);
7208 stmf_update_kstat_lport_q(task, kstat_waitq_exit);
7209 }
7210 }
7211
7212 static void
stmf_lport_xfer_start(stmf_i_scsi_task_t * itask,stmf_data_buf_t * dbuf)7213 stmf_lport_xfer_start(stmf_i_scsi_task_t *itask, stmf_data_buf_t *dbuf)
7214 {
7215 stmf_itl_data_t *itl = itask->itask_itl_datap;
7216
7217 if (itl == NULL)
7218 return;
7219
7220 DTRACE_PROBE2(scsi__xfer__start, scsi_task_t *, itask->itask_task,
7221 stmf_data_buf_t *, dbuf);
7222
7223 dbuf->db_xfer_start_timestamp = gethrtime();
7224 }
7225
7226 static void
stmf_lport_xfer_done(stmf_i_scsi_task_t * itask,stmf_data_buf_t * dbuf)7227 stmf_lport_xfer_done(stmf_i_scsi_task_t *itask, stmf_data_buf_t *dbuf)
7228 {
7229 stmf_itl_data_t *itl = itask->itask_itl_datap;
7230 hrtime_t elapsed_time;
7231 uint64_t xfer_size;
7232
7233 if (itl == NULL)
7234 return;
7235
7236 xfer_size = (dbuf->db_xfer_status == STMF_SUCCESS) ?
7237 dbuf->db_data_size : 0;
7238
7239 elapsed_time = gethrtime() - dbuf->db_xfer_start_timestamp;
7240 if (dbuf->db_flags & DB_DIRECTION_TO_RPORT) {
7241 atomic_add_64((uint64_t *)&itask->itask_lport_read_time,
7242 elapsed_time);
7243 atomic_add_64((uint64_t *)&itask->itask_read_xfer,
7244 xfer_size);
7245 } else {
7246 atomic_add_64((uint64_t *)&itask->itask_lport_write_time,
7247 elapsed_time);
7248 atomic_add_64((uint64_t *)&itask->itask_write_xfer,
7249 xfer_size);
7250 }
7251
7252 DTRACE_PROBE3(scsi__xfer__end, scsi_task_t *, itask->itask_task,
7253 stmf_data_buf_t *, dbuf, hrtime_t, elapsed_time);
7254
7255 dbuf->db_xfer_start_timestamp = 0;
7256 }
7257
7258 void
stmf_svc_init()7259 stmf_svc_init()
7260 {
7261 if (stmf_state.stmf_svc_flags & STMF_SVC_STARTED)
7262 return;
7263 stmf_state.stmf_svc_tailp = &stmf_state.stmf_svc_active;
7264 stmf_state.stmf_svc_taskq = ddi_taskq_create(0, "STMF_SVC_TASKQ", 1,
7265 TASKQ_DEFAULTPRI, 0);
7266 (void) ddi_taskq_dispatch(stmf_state.stmf_svc_taskq,
7267 stmf_svc, 0, DDI_SLEEP);
7268 }
7269
7270 stmf_status_t
stmf_svc_fini()7271 stmf_svc_fini()
7272 {
7273 uint32_t i;
7274
7275 mutex_enter(&stmf_state.stmf_lock);
7276 if (stmf_state.stmf_svc_flags & STMF_SVC_STARTED) {
7277 stmf_state.stmf_svc_flags |= STMF_SVC_TERMINATE;
7278 cv_signal(&stmf_state.stmf_cv);
7279 }
7280 mutex_exit(&stmf_state.stmf_lock);
7281
7282 /* Wait for 5 seconds */
7283 for (i = 0; i < 500; i++) {
7284 if (stmf_state.stmf_svc_flags & STMF_SVC_STARTED)
7285 delay(drv_usectohz(10000));
7286 else
7287 break;
7288 }
7289 if (i == 500)
7290 return (STMF_BUSY);
7291
7292 ddi_taskq_destroy(stmf_state.stmf_svc_taskq);
7293
7294 return (STMF_SUCCESS);
7295 }
7296
7297 struct stmf_svc_clocks {
7298 clock_t drain_start, drain_next;
7299 clock_t timing_start, timing_next;
7300 clock_t worker_delay;
7301 };
7302
7303 /* ARGSUSED */
7304 void
stmf_svc(void * arg)7305 stmf_svc(void *arg)
7306 {
7307 stmf_svc_req_t *req;
7308 stmf_lu_t *lu;
7309 stmf_i_lu_t *ilu;
7310 stmf_local_port_t *lport;
7311 struct stmf_svc_clocks clks = { 0 };
7312
7313 mutex_enter(&stmf_state.stmf_lock);
7314 stmf_state.stmf_svc_flags |= STMF_SVC_STARTED | STMF_SVC_ACTIVE;
7315
7316 while (!(stmf_state.stmf_svc_flags & STMF_SVC_TERMINATE)) {
7317 if (stmf_state.stmf_svc_active == NULL) {
7318 stmf_svc_timeout(&clks);
7319 continue;
7320 }
7321
7322 /*
7323 * Pop the front request from the active list. After this,
7324 * the request will no longer be referenced by global state,
7325 * so it should be safe to access it without holding the
7326 * stmf state lock.
7327 */
7328 req = stmf_state.stmf_svc_active;
7329 stmf_state.stmf_svc_active = req->svc_next;
7330
7331 if (stmf_state.stmf_svc_active == NULL)
7332 stmf_state.stmf_svc_tailp = &stmf_state.stmf_svc_active;
7333
7334 switch (req->svc_cmd) {
7335 case STMF_CMD_LPORT_ONLINE:
7336 /* Fallthrough */
7337 case STMF_CMD_LPORT_OFFLINE:
7338 mutex_exit(&stmf_state.stmf_lock);
7339 lport = (stmf_local_port_t *)req->svc_obj;
7340 lport->lport_ctl(lport, req->svc_cmd, &req->svc_info);
7341 break;
7342 case STMF_CMD_LU_ONLINE:
7343 mutex_exit(&stmf_state.stmf_lock);
7344 lu = (stmf_lu_t *)req->svc_obj;
7345 lu->lu_ctl(lu, req->svc_cmd, &req->svc_info);
7346 break;
7347 case STMF_CMD_LU_OFFLINE:
7348 /* Remove all mappings of this LU */
7349 stmf_session_lu_unmapall((stmf_lu_t *)req->svc_obj);
7350 /* Kill all the pending I/Os for this LU */
7351 mutex_exit(&stmf_state.stmf_lock);
7352 stmf_task_lu_killall((stmf_lu_t *)req->svc_obj, NULL,
7353 STMF_ABORTED);
7354 lu = (stmf_lu_t *)req->svc_obj;
7355 ilu = (stmf_i_lu_t *)lu->lu_stmf_private;
7356 stmf_wait_ilu_tasks_finish(ilu);
7357 lu->lu_ctl(lu, req->svc_cmd, &req->svc_info);
7358 break;
7359 default:
7360 cmn_err(CE_PANIC, "stmf_svc: unknown cmd %d",
7361 req->svc_cmd);
7362 }
7363
7364 kmem_free(req, req->svc_req_alloc_size);
7365 mutex_enter(&stmf_state.stmf_lock);
7366 }
7367
7368 stmf_state.stmf_svc_flags &= ~(STMF_SVC_STARTED | STMF_SVC_ACTIVE);
7369 mutex_exit(&stmf_state.stmf_lock);
7370 }
7371
7372 static void
stmf_svc_timeout(struct stmf_svc_clocks * clks)7373 stmf_svc_timeout(struct stmf_svc_clocks *clks)
7374 {
7375 clock_t td;
7376 stmf_i_local_port_t *ilport, *next_ilport;
7377 stmf_i_scsi_session_t *iss;
7378
7379 ASSERT(mutex_owned(&stmf_state.stmf_lock));
7380
7381 td = drv_usectohz(20000);
7382
7383 /* Do timeouts */
7384 if (stmf_state.stmf_nlus &&
7385 ((!clks->timing_next) || (ddi_get_lbolt() >= clks->timing_next))) {
7386 if (!stmf_state.stmf_svc_ilu_timing) {
7387 /* we are starting a new round */
7388 stmf_state.stmf_svc_ilu_timing =
7389 stmf_state.stmf_ilulist;
7390 clks->timing_start = ddi_get_lbolt();
7391 }
7392
7393 stmf_check_ilu_timing();
7394 if (!stmf_state.stmf_svc_ilu_timing) {
7395 /* we finished a complete round */
7396 clks->timing_next =
7397 clks->timing_start + drv_usectohz(5*1000*1000);
7398 } else {
7399 /* we still have some ilu items to check */
7400 clks->timing_next =
7401 ddi_get_lbolt() + drv_usectohz(1*1000*1000);
7402 }
7403
7404 if (stmf_state.stmf_svc_active)
7405 return;
7406 }
7407
7408 /* Check if there are free tasks to clear */
7409 if (stmf_state.stmf_nlus &&
7410 ((!clks->drain_next) || (ddi_get_lbolt() >= clks->drain_next))) {
7411 if (!stmf_state.stmf_svc_ilu_draining) {
7412 /* we are starting a new round */
7413 stmf_state.stmf_svc_ilu_draining =
7414 stmf_state.stmf_ilulist;
7415 clks->drain_start = ddi_get_lbolt();
7416 }
7417
7418 stmf_check_freetask();
7419 if (!stmf_state.stmf_svc_ilu_draining) {
7420 /* we finished a complete round */
7421 clks->drain_next =
7422 clks->drain_start + drv_usectohz(10*1000*1000);
7423 } else {
7424 /* we still have some ilu items to check */
7425 clks->drain_next =
7426 ddi_get_lbolt() + drv_usectohz(1*1000*1000);
7427 }
7428
7429 if (stmf_state.stmf_svc_active)
7430 return;
7431 }
7432
7433 /* Check if we need to run worker_mgmt */
7434 if (ddi_get_lbolt() > clks->worker_delay) {
7435 stmf_worker_mgmt();
7436 clks->worker_delay = ddi_get_lbolt() +
7437 stmf_worker_mgmt_delay;
7438 }
7439
7440 /* Check if any active session got its 1st LUN */
7441 if (stmf_state.stmf_process_initial_luns) {
7442 int stmf_level = 0;
7443 int port_level;
7444
7445 for (ilport = stmf_state.stmf_ilportlist; ilport;
7446 ilport = next_ilport) {
7447 int ilport_lock_held;
7448 next_ilport = ilport->ilport_next;
7449
7450 if ((ilport->ilport_flags &
7451 ILPORT_SS_GOT_INITIAL_LUNS) == 0)
7452 continue;
7453
7454 port_level = 0;
7455 rw_enter(&ilport->ilport_lock, RW_READER);
7456 ilport_lock_held = 1;
7457
7458 for (iss = ilport->ilport_ss_list; iss;
7459 iss = iss->iss_next) {
7460 if ((iss->iss_flags &
7461 ISS_GOT_INITIAL_LUNS) == 0)
7462 continue;
7463
7464 port_level++;
7465 stmf_level++;
7466 atomic_and_32(&iss->iss_flags,
7467 ~ISS_GOT_INITIAL_LUNS);
7468 atomic_or_32(&iss->iss_flags,
7469 ISS_EVENT_ACTIVE);
7470 rw_exit(&ilport->ilport_lock);
7471 ilport_lock_held = 0;
7472 mutex_exit(&stmf_state.stmf_lock);
7473 stmf_generate_lport_event(ilport,
7474 LPORT_EVENT_INITIAL_LUN_MAPPED,
7475 iss->iss_ss, 0);
7476 atomic_and_32(&iss->iss_flags,
7477 ~ISS_EVENT_ACTIVE);
7478 mutex_enter(&stmf_state.stmf_lock);
7479 /*
7480 * scan all the ilports again as the
7481 * ilport list might have changed.
7482 */
7483 next_ilport = stmf_state.stmf_ilportlist;
7484 break;
7485 }
7486
7487 if (port_level == 0)
7488 atomic_and_32(&ilport->ilport_flags,
7489 ~ILPORT_SS_GOT_INITIAL_LUNS);
7490 /* drop the lock if we are holding it. */
7491 if (ilport_lock_held == 1)
7492 rw_exit(&ilport->ilport_lock);
7493
7494 /* Max 4 session at a time */
7495 if (stmf_level >= 4)
7496 break;
7497 }
7498
7499 if (stmf_level == 0)
7500 stmf_state.stmf_process_initial_luns = 0;
7501 }
7502
7503 stmf_state.stmf_svc_flags &= ~STMF_SVC_ACTIVE;
7504 (void) cv_reltimedwait(&stmf_state.stmf_cv,
7505 &stmf_state.stmf_lock, td, TR_CLOCK_TICK);
7506 stmf_state.stmf_svc_flags |= STMF_SVC_ACTIVE;
7507 }
7508
7509 /*
7510 * Waits for ongoing I/O tasks to finish on an LU in preparation for
7511 * the LU's offlining. The LU should already be in an Offlining state
7512 * (otherwise I/O to the LU might never end). There is an additional
7513 * enforcement of this via a deadman timer check.
7514 */
7515 static void
stmf_wait_ilu_tasks_finish(stmf_i_lu_t * ilu)7516 stmf_wait_ilu_tasks_finish(stmf_i_lu_t *ilu)
7517 {
7518 clock_t start, now, deadline;
7519
7520 start = now = ddi_get_lbolt();
7521 deadline = start + drv_usectohz(stmf_io_deadman * 1000000llu);
7522 mutex_enter(&ilu->ilu_task_lock);
7523 while (ilu->ilu_ntasks != ilu->ilu_ntasks_free) {
7524 (void) cv_timedwait(&ilu->ilu_offline_pending_cv,
7525 &ilu->ilu_task_lock, deadline);
7526 now = ddi_get_lbolt();
7527 if (now > deadline) {
7528 if (stmf_io_deadman_enabled) {
7529 cmn_err(CE_PANIC, "stmf_svc: I/O deadman hit "
7530 "on STMF_CMD_LU_OFFLINE after %d seconds",
7531 stmf_io_deadman);
7532 } else {
7533 /* keep on spinning */
7534 deadline = now + drv_usectohz(stmf_io_deadman *
7535 1000000llu);
7536 }
7537 }
7538 }
7539 mutex_exit(&ilu->ilu_task_lock);
7540 DTRACE_PROBE1(deadman__timeout__wait, clock_t, now - start);
7541 }
7542
7543 void
stmf_svc_queue(int cmd,void * obj,stmf_state_change_info_t * info)7544 stmf_svc_queue(int cmd, void *obj, stmf_state_change_info_t *info)
7545 {
7546 stmf_svc_req_t *req;
7547 int s;
7548
7549 ASSERT(!mutex_owned(&stmf_state.stmf_lock));
7550 s = sizeof (stmf_svc_req_t);
7551 if (info->st_additional_info) {
7552 s += strlen(info->st_additional_info) + 1;
7553 }
7554 req = kmem_zalloc(s, KM_SLEEP);
7555
7556 req->svc_cmd = cmd;
7557 req->svc_obj = obj;
7558 req->svc_info.st_rflags = info->st_rflags;
7559 if (info->st_additional_info) {
7560 req->svc_info.st_additional_info = (char *)(GET_BYTE_OFFSET(req,
7561 sizeof (stmf_svc_req_t)));
7562 (void) strcpy(req->svc_info.st_additional_info,
7563 info->st_additional_info);
7564 }
7565 req->svc_req_alloc_size = s;
7566 req->svc_next = NULL;
7567
7568 mutex_enter(&stmf_state.stmf_lock);
7569 *stmf_state.stmf_svc_tailp = req;
7570 stmf_state.stmf_svc_tailp = &req->svc_next;
7571 if ((stmf_state.stmf_svc_flags & STMF_SVC_ACTIVE) == 0) {
7572 cv_signal(&stmf_state.stmf_cv);
7573 }
7574 mutex_exit(&stmf_state.stmf_lock);
7575 }
7576
7577 static void
stmf_svc_kill_obj_requests(void * obj)7578 stmf_svc_kill_obj_requests(void *obj)
7579 {
7580 stmf_svc_req_t *prev_req = NULL;
7581 stmf_svc_req_t *next_req;
7582 stmf_svc_req_t *req;
7583
7584 ASSERT(mutex_owned(&stmf_state.stmf_lock));
7585
7586 for (req = stmf_state.stmf_svc_active; req != NULL; req = next_req) {
7587 next_req = req->svc_next;
7588
7589 if (req->svc_obj == obj) {
7590 if (prev_req != NULL)
7591 prev_req->svc_next = next_req;
7592 else
7593 stmf_state.stmf_svc_active = next_req;
7594
7595 if (next_req == NULL)
7596 stmf_state.stmf_svc_tailp = (prev_req != NULL) ?
7597 &prev_req->svc_next :
7598 &stmf_state.stmf_svc_active;
7599
7600 kmem_free(req, req->svc_req_alloc_size);
7601 } else {
7602 prev_req = req;
7603 }
7604 }
7605 }
7606
7607 void
stmf_trace(caddr_t ident,const char * fmt,...)7608 stmf_trace(caddr_t ident, const char *fmt, ...)
7609 {
7610 va_list args;
7611 char tbuf[160];
7612 int len;
7613
7614 if (!stmf_trace_on)
7615 return;
7616 len = snprintf(tbuf, 158, "%s:%07lu: ", ident ? ident : "",
7617 ddi_get_lbolt());
7618 va_start(args, fmt);
7619 len += vsnprintf(tbuf + len, 158 - len, fmt, args);
7620 va_end(args);
7621
7622 if (len > 158) {
7623 len = 158;
7624 }
7625 tbuf[len++] = '\n';
7626 tbuf[len] = 0;
7627
7628 mutex_enter(&trace_buf_lock);
7629 bcopy(tbuf, &stmf_trace_buf[trace_buf_curndx], len+1);
7630 trace_buf_curndx += len;
7631 if (trace_buf_curndx > (trace_buf_size - 320))
7632 trace_buf_curndx = 0;
7633 mutex_exit(&trace_buf_lock);
7634 }
7635
7636 void
stmf_trace_clear()7637 stmf_trace_clear()
7638 {
7639 if (!stmf_trace_on)
7640 return;
7641 mutex_enter(&trace_buf_lock);
7642 trace_buf_curndx = 0;
7643 if (trace_buf_size > 0)
7644 stmf_trace_buf[0] = 0;
7645 mutex_exit(&trace_buf_lock);
7646 }
7647
7648 static void
stmf_abort_task_offline(scsi_task_t * task,int offline_lu,char * info)7649 stmf_abort_task_offline(scsi_task_t *task, int offline_lu, char *info)
7650 {
7651 stmf_state_change_info_t change_info;
7652 void *ctl_private;
7653 uint32_t ctl_cmd;
7654 int msg = 0;
7655
7656 stmf_trace("FROM STMF", "abort_task_offline called for %s: %s",
7657 offline_lu ? "LU" : "LPORT", info ? info : "no additional info");
7658 change_info.st_additional_info = info;
7659 if (offline_lu) {
7660 change_info.st_rflags = STMF_RFLAG_RESET |
7661 STMF_RFLAG_LU_ABORT;
7662 ctl_private = task->task_lu;
7663 if (((stmf_i_lu_t *)
7664 task->task_lu->lu_stmf_private)->ilu_state ==
7665 STMF_STATE_ONLINE) {
7666 msg = 1;
7667 }
7668 ctl_cmd = STMF_CMD_LU_OFFLINE;
7669 } else {
7670 change_info.st_rflags = STMF_RFLAG_RESET |
7671 STMF_RFLAG_LPORT_ABORT;
7672 ctl_private = task->task_lport;
7673 if (((stmf_i_local_port_t *)
7674 task->task_lport->lport_stmf_private)->ilport_state ==
7675 STMF_STATE_ONLINE) {
7676 msg = 1;
7677 }
7678 ctl_cmd = STMF_CMD_LPORT_OFFLINE;
7679 }
7680
7681 if (msg) {
7682 stmf_trace(0, "Calling stmf_ctl to offline %s : %s",
7683 offline_lu ? "LU" : "LPORT", info ? info :
7684 "<no additional info>");
7685 }
7686 (void) stmf_ctl(ctl_cmd, ctl_private, &change_info);
7687 }
7688
7689 static char
stmf_ctoi(char c)7690 stmf_ctoi(char c)
7691 {
7692 if ((c >= '0') && (c <= '9'))
7693 c -= '0';
7694 else if ((c >= 'A') && (c <= 'F'))
7695 c = c - 'A' + 10;
7696 else if ((c >= 'a') && (c <= 'f'))
7697 c = c - 'a' + 10;
7698 else
7699 c = -1;
7700 return (c);
7701 }
7702
7703 /* Convert from Hex value in ASCII format to the equivalent bytes */
7704 static boolean_t
stmf_base16_str_to_binary(char * c,int dplen,uint8_t * dp)7705 stmf_base16_str_to_binary(char *c, int dplen, uint8_t *dp)
7706 {
7707 int ii;
7708
7709 for (ii = 0; ii < dplen; ii++) {
7710 char nibble1, nibble2;
7711 char enc_char = *c++;
7712 nibble1 = stmf_ctoi(enc_char);
7713
7714 enc_char = *c++;
7715 nibble2 = stmf_ctoi(enc_char);
7716 if (nibble1 == -1 || nibble2 == -1)
7717 return (B_FALSE);
7718
7719 dp[ii] = (nibble1 << 4) | nibble2;
7720 }
7721 return (B_TRUE);
7722 }
7723
7724 boolean_t
stmf_scsilib_tptid_validate(scsi_transport_id_t * tptid,uint32_t total_sz,uint16_t * tptid_sz)7725 stmf_scsilib_tptid_validate(scsi_transport_id_t *tptid, uint32_t total_sz,
7726 uint16_t *tptid_sz)
7727 {
7728 uint16_t tpd_len = SCSI_TPTID_SIZE;
7729
7730 if (tptid_sz)
7731 *tptid_sz = 0;
7732 if (total_sz < sizeof (scsi_transport_id_t))
7733 return (B_FALSE);
7734
7735 switch (tptid->protocol_id) {
7736
7737 case PROTOCOL_FIBRE_CHANNEL:
7738 /* FC Transport ID validation checks. SPC3 rev23, Table 284 */
7739 if (total_sz < tpd_len || tptid->format_code != 0)
7740 return (B_FALSE);
7741 break;
7742
7743 case PROTOCOL_iSCSI:
7744 {
7745 iscsi_transport_id_t *iscsiid;
7746 uint16_t adn_len, name_len;
7747
7748 /* Check for valid format code, SPC3 rev 23 Table 288 */
7749 if ((total_sz < tpd_len) ||
7750 (tptid->format_code != 0 && tptid->format_code != 1))
7751 return (B_FALSE);
7752
7753 iscsiid = (iscsi_transport_id_t *)tptid;
7754 adn_len = READ_SCSI16(iscsiid->add_len, uint16_t);
7755 tpd_len = sizeof (iscsi_transport_id_t) + adn_len - 1;
7756
7757 /*
7758 * iSCSI Transport ID validation checks.
7759 * As per SPC3 rev 23 Section 7.5.4.6 and Table 289 & Table 290
7760 */
7761 if (adn_len < 20 || (adn_len % 4 != 0))
7762 return (B_FALSE);
7763
7764 name_len = strnlen(iscsiid->iscsi_name, adn_len);
7765 if (name_len == 0 || name_len >= adn_len)
7766 return (B_FALSE);
7767
7768 /* If the format_code is 1 check for ISID seperator */
7769 if ((tptid->format_code == 1) && (strstr(iscsiid->iscsi_name,
7770 SCSI_TPTID_ISCSI_ISID_SEPERATOR) == NULL))
7771 return (B_FALSE);
7772
7773 }
7774 break;
7775
7776 case PROTOCOL_SRP:
7777 /* SRP Transport ID validation checks. SPC3 rev23, Table 287 */
7778 if (total_sz < tpd_len || tptid->format_code != 0)
7779 return (B_FALSE);
7780 break;
7781
7782 case PROTOCOL_PARALLEL_SCSI:
7783 case PROTOCOL_SSA:
7784 case PROTOCOL_IEEE_1394:
7785 case PROTOCOL_SAS:
7786 case PROTOCOL_ADT:
7787 case PROTOCOL_ATAPI:
7788 default:
7789 {
7790 stmf_dflt_scsi_tptid_t *dflttpd;
7791
7792 tpd_len = sizeof (stmf_dflt_scsi_tptid_t);
7793 if (total_sz < tpd_len)
7794 return (B_FALSE);
7795 dflttpd = (stmf_dflt_scsi_tptid_t *)tptid;
7796 tpd_len = tpd_len + SCSI_READ16(&dflttpd->ident_len) - 1;
7797 if (total_sz < tpd_len)
7798 return (B_FALSE);
7799 }
7800 break;
7801 }
7802 if (tptid_sz)
7803 *tptid_sz = tpd_len;
7804 return (B_TRUE);
7805 }
7806
7807 boolean_t
stmf_scsilib_tptid_compare(scsi_transport_id_t * tpd1,scsi_transport_id_t * tpd2)7808 stmf_scsilib_tptid_compare(scsi_transport_id_t *tpd1,
7809 scsi_transport_id_t *tpd2)
7810 {
7811 if ((tpd1->protocol_id != tpd2->protocol_id) ||
7812 (tpd1->format_code != tpd2->format_code))
7813 return (B_FALSE);
7814
7815 switch (tpd1->protocol_id) {
7816
7817 case PROTOCOL_iSCSI:
7818 {
7819 iscsi_transport_id_t *iscsitpd1, *iscsitpd2;
7820 uint16_t len;
7821
7822 iscsitpd1 = (iscsi_transport_id_t *)tpd1;
7823 iscsitpd2 = (iscsi_transport_id_t *)tpd2;
7824 len = SCSI_READ16(&iscsitpd1->add_len);
7825 if ((memcmp(iscsitpd1->add_len, iscsitpd2->add_len, 2) != 0) ||
7826 (memcmp(iscsitpd1->iscsi_name, iscsitpd2->iscsi_name, len)
7827 != 0))
7828 return (B_FALSE);
7829 }
7830 break;
7831
7832 case PROTOCOL_SRP:
7833 {
7834 scsi_srp_transport_id_t *srptpd1, *srptpd2;
7835
7836 srptpd1 = (scsi_srp_transport_id_t *)tpd1;
7837 srptpd2 = (scsi_srp_transport_id_t *)tpd2;
7838 if (memcmp(srptpd1->srp_name, srptpd2->srp_name,
7839 sizeof (srptpd1->srp_name)) != 0)
7840 return (B_FALSE);
7841 }
7842 break;
7843
7844 case PROTOCOL_FIBRE_CHANNEL:
7845 {
7846 scsi_fc_transport_id_t *fctpd1, *fctpd2;
7847
7848 fctpd1 = (scsi_fc_transport_id_t *)tpd1;
7849 fctpd2 = (scsi_fc_transport_id_t *)tpd2;
7850 if (memcmp(fctpd1->port_name, fctpd2->port_name,
7851 sizeof (fctpd1->port_name)) != 0)
7852 return (B_FALSE);
7853 }
7854 break;
7855
7856 case PROTOCOL_PARALLEL_SCSI:
7857 case PROTOCOL_SSA:
7858 case PROTOCOL_IEEE_1394:
7859 case PROTOCOL_SAS:
7860 case PROTOCOL_ADT:
7861 case PROTOCOL_ATAPI:
7862 default:
7863 {
7864 stmf_dflt_scsi_tptid_t *dflt1, *dflt2;
7865 uint16_t len;
7866
7867 dflt1 = (stmf_dflt_scsi_tptid_t *)tpd1;
7868 dflt2 = (stmf_dflt_scsi_tptid_t *)tpd2;
7869 len = SCSI_READ16(&dflt1->ident_len);
7870 if ((memcmp(dflt1->ident_len, dflt2->ident_len, 2) != 0) ||
7871 (memcmp(dflt1->ident, dflt2->ident, len) != 0))
7872 return (B_FALSE);
7873 }
7874 break;
7875 }
7876 return (B_TRUE);
7877 }
7878
7879 /*
7880 * Changes devid_desc to corresponding TransportID format
7881 * Returns :- pointer to stmf_remote_port_t
7882 * Note :- Allocates continous memory for stmf_remote_port_t and TransportID,
7883 * This memory need to be freed when this remote_port is no longer
7884 * used.
7885 */
7886 stmf_remote_port_t *
stmf_scsilib_devid_to_remote_port(scsi_devid_desc_t * devid)7887 stmf_scsilib_devid_to_remote_port(scsi_devid_desc_t *devid)
7888 {
7889 struct scsi_fc_transport_id *fc_tpd;
7890 struct iscsi_transport_id *iscsi_tpd;
7891 struct scsi_srp_transport_id *srp_tpd;
7892 struct stmf_dflt_scsi_tptid *dflt_tpd;
7893 uint16_t ident_len, sz = 0;
7894 stmf_remote_port_t *rpt = NULL;
7895
7896 ident_len = devid->ident_length;
7897 ASSERT(ident_len);
7898 switch (devid->protocol_id) {
7899 case PROTOCOL_FIBRE_CHANNEL:
7900 sz = sizeof (scsi_fc_transport_id_t);
7901 rpt = stmf_remote_port_alloc(sz);
7902 rpt->rport_tptid->format_code = 0;
7903 rpt->rport_tptid->protocol_id = devid->protocol_id;
7904 fc_tpd = (scsi_fc_transport_id_t *)rpt->rport_tptid;
7905 /*
7906 * convert from "wwn.xxxxxxxxxxxxxxxx" to 8-byte binary
7907 * skip first 4 byte for "wwn."
7908 */
7909 ASSERT(strncmp("wwn.", (char *)devid->ident, 4) == 0);
7910 if ((ident_len < SCSI_TPTID_FC_PORT_NAME_SIZE * 2 + 4) ||
7911 !stmf_base16_str_to_binary((char *)devid->ident + 4,
7912 SCSI_TPTID_FC_PORT_NAME_SIZE, fc_tpd->port_name))
7913 goto devid_to_remote_port_fail;
7914 break;
7915
7916 case PROTOCOL_iSCSI:
7917 sz = ALIGNED_TO_8BYTE_BOUNDARY(sizeof (iscsi_transport_id_t) +
7918 ident_len - 1);
7919 rpt = stmf_remote_port_alloc(sz);
7920 rpt->rport_tptid->format_code = 0;
7921 rpt->rport_tptid->protocol_id = devid->protocol_id;
7922 iscsi_tpd = (iscsi_transport_id_t *)rpt->rport_tptid;
7923 SCSI_WRITE16(iscsi_tpd->add_len, ident_len);
7924 (void) memcpy(iscsi_tpd->iscsi_name, devid->ident, ident_len);
7925 break;
7926
7927 case PROTOCOL_SRP:
7928 sz = sizeof (scsi_srp_transport_id_t);
7929 rpt = stmf_remote_port_alloc(sz);
7930 rpt->rport_tptid->format_code = 0;
7931 rpt->rport_tptid->protocol_id = devid->protocol_id;
7932 srp_tpd = (scsi_srp_transport_id_t *)rpt->rport_tptid;
7933 /*
7934 * convert from "eui.xxxxxxxxxxxxxxx" to 8-byte binary
7935 * skip first 4 byte for "eui."
7936 * Assume 8-byte initiator-extension part of srp_name is NOT
7937 * stored in devid and hence will be set as zero
7938 */
7939 ASSERT(strncmp("eui.", (char *)devid->ident, 4) == 0);
7940 if ((ident_len < (SCSI_TPTID_SRP_PORT_NAME_LEN - 8) * 2 + 4) ||
7941 !stmf_base16_str_to_binary((char *)devid->ident+4,
7942 SCSI_TPTID_SRP_PORT_NAME_LEN, srp_tpd->srp_name))
7943 goto devid_to_remote_port_fail;
7944 break;
7945
7946 case PROTOCOL_PARALLEL_SCSI:
7947 case PROTOCOL_SSA:
7948 case PROTOCOL_IEEE_1394:
7949 case PROTOCOL_SAS:
7950 case PROTOCOL_ADT:
7951 case PROTOCOL_ATAPI:
7952 default :
7953 ident_len = devid->ident_length;
7954 sz = ALIGNED_TO_8BYTE_BOUNDARY(sizeof (stmf_dflt_scsi_tptid_t) +
7955 ident_len - 1);
7956 rpt = stmf_remote_port_alloc(sz);
7957 rpt->rport_tptid->format_code = 0;
7958 rpt->rport_tptid->protocol_id = devid->protocol_id;
7959 dflt_tpd = (stmf_dflt_scsi_tptid_t *)rpt->rport_tptid;
7960 SCSI_WRITE16(dflt_tpd->ident_len, ident_len);
7961 (void) memcpy(dflt_tpd->ident, devid->ident, ident_len);
7962 break;
7963 }
7964 return (rpt);
7965
7966 devid_to_remote_port_fail:
7967 stmf_remote_port_free(rpt);
7968 return (NULL);
7969
7970 }
7971
7972 stmf_remote_port_t *
stmf_remote_port_alloc(uint16_t tptid_sz)7973 stmf_remote_port_alloc(uint16_t tptid_sz) {
7974 stmf_remote_port_t *rpt;
7975 rpt = (stmf_remote_port_t *)kmem_zalloc(
7976 sizeof (stmf_remote_port_t) + tptid_sz, KM_SLEEP);
7977 rpt->rport_tptid_sz = tptid_sz;
7978 rpt->rport_tptid = (scsi_transport_id_t *)(rpt + 1);
7979 return (rpt);
7980 }
7981
7982 void
stmf_remote_port_free(stmf_remote_port_t * rpt)7983 stmf_remote_port_free(stmf_remote_port_t *rpt)
7984 {
7985 /*
7986 * Note: stmf_scsilib_devid_to_remote_port() function allocates
7987 * remote port structures for all transports in the same way, So
7988 * it is safe to deallocate it in a protocol independent manner.
7989 * If any of the allocation method changes, corresponding changes
7990 * need to be made here too.
7991 */
7992 kmem_free(rpt, sizeof (stmf_remote_port_t) + rpt->rport_tptid_sz);
7993 }
7994