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Staging: strip: delete the driver
[linux/fpc-iii.git] / drivers / scsi / osd / osd_initiator.c
blobee4b6914667f9cb2a55c9f20f493bfb971357a9d
1 /*
2 * osd_initiator - Main body of the osd initiator library.
3 *
4 * Note: The file does not contain the advanced security functionality which
5 * is only needed by the security_manager's initiators.
6 *
7 * Copyright (C) 2008 Panasas Inc. All rights reserved.
8 *
9 * Authors:
10 * Boaz Harrosh <bharrosh@panasas.com>
11 * Benny Halevy <bhalevy@panasas.com>
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License version 2
15 *
16 * Redistribution and use in source and binary forms, with or without
17 * modification, are permitted provided that the following conditions
18 * are met:
19 *
20 * 1. Redistributions of source code must retain the above copyright
21 * notice, this list of conditions and the following disclaimer.
22 * 2. Redistributions in binary form must reproduce the above copyright
23 * notice, this list of conditions and the following disclaimer in the
24 * documentation and/or other materials provided with the distribution.
25 * 3. Neither the name of the Panasas company nor the names of its
26 * contributors may be used to endorse or promote products derived
27 * from this software without specific prior written permission.
28 *
29 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
30 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
31 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
32 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
33 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
34 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
35 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
36 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
37 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
38 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
39 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
40 */
41
42 #include <linux/slab.h>
43
44 #include <scsi/osd_initiator.h>
45 #include <scsi/osd_sec.h>
46 #include <scsi/osd_attributes.h>
47 #include <scsi/osd_sense.h>
48
49 #include <scsi/scsi_device.h>
50
51 #include "osd_debug.h"
52
53 #ifndef __unused
54 # define __unused __attribute__((unused))
55 #endif
56
57 enum { OSD_REQ_RETRIES = 1 };
58
59 MODULE_AUTHOR("Boaz Harrosh <bharrosh@panasas.com>");
60 MODULE_DESCRIPTION("open-osd initiator library libosd.ko");
61 MODULE_LICENSE("GPL");
62
63 static inline void build_test(void)
64 {
65 /* structures were not packed */
66 BUILD_BUG_ON(sizeof(struct osd_capability) != OSD_CAP_LEN);
67 BUILD_BUG_ON(sizeof(struct osdv2_cdb) != OSD_TOTAL_CDB_LEN);
68 BUILD_BUG_ON(sizeof(struct osdv1_cdb) != OSDv1_TOTAL_CDB_LEN);
69 }
70
71 static const char *_osd_ver_desc(struct osd_request *or)
72 {
73 return osd_req_is_ver1(or) ? "OSD1" : "OSD2";
74 }
75
76 #define ATTR_DEF_RI(id, len) ATTR_DEF(OSD_APAGE_ROOT_INFORMATION, id, len)
77
78 static int _osd_get_print_system_info(struct osd_dev *od,
79 void *caps, struct osd_dev_info *odi)
80 {
81 struct osd_request *or;
82 struct osd_attr get_attrs[] = {
83 ATTR_DEF_RI(OSD_ATTR_RI_VENDOR_IDENTIFICATION, 8),
84 ATTR_DEF_RI(OSD_ATTR_RI_PRODUCT_IDENTIFICATION, 16),
85 ATTR_DEF_RI(OSD_ATTR_RI_PRODUCT_MODEL, 32),
86 ATTR_DEF_RI(OSD_ATTR_RI_PRODUCT_REVISION_LEVEL, 4),
87 ATTR_DEF_RI(OSD_ATTR_RI_PRODUCT_SERIAL_NUMBER, 64 /*variable*/),
88 ATTR_DEF_RI(OSD_ATTR_RI_OSD_NAME, 64 /*variable*/),
89 ATTR_DEF_RI(OSD_ATTR_RI_TOTAL_CAPACITY, 8),
90 ATTR_DEF_RI(OSD_ATTR_RI_USED_CAPACITY, 8),
91 ATTR_DEF_RI(OSD_ATTR_RI_NUMBER_OF_PARTITIONS, 8),
92 ATTR_DEF_RI(OSD_ATTR_RI_CLOCK, 6),
93 /* IBM-OSD-SIM Has a bug with this one put it last */
94 ATTR_DEF_RI(OSD_ATTR_RI_OSD_SYSTEM_ID, 20),
95 };
96 void *iter = NULL, *pFirst;
97 int nelem = ARRAY_SIZE(get_attrs), a = 0;
98 int ret;
99
100 or = osd_start_request(od, GFP_KERNEL);
101 if (!or)
102 return -ENOMEM;
103
104 /* get attrs */
105 osd_req_get_attributes(or, &osd_root_object);
106 osd_req_add_get_attr_list(or, get_attrs, ARRAY_SIZE(get_attrs));
107
108 ret = osd_finalize_request(or, 0, caps, NULL);
109 if (ret)
110 goto out;
111
112 ret = osd_execute_request(or);
113 if (ret) {
114 OSD_ERR("Failed to detect %s => %d\n", _osd_ver_desc(or), ret);
115 goto out;
116 }
117
118 osd_req_decode_get_attr_list(or, get_attrs, &nelem, &iter);
119
120 OSD_INFO("Detected %s device\n",
121 _osd_ver_desc(or));
122
123 pFirst = get_attrs[a++].val_ptr;
124 OSD_INFO("VENDOR_IDENTIFICATION [%s]\n",
125 (char *)pFirst);
126
127 pFirst = get_attrs[a++].val_ptr;
128 OSD_INFO("PRODUCT_IDENTIFICATION [%s]\n",
129 (char *)pFirst);
130
131 pFirst = get_attrs[a++].val_ptr;
132 OSD_INFO("PRODUCT_MODEL [%s]\n",
133 (char *)pFirst);
134
135 pFirst = get_attrs[a++].val_ptr;
136 OSD_INFO("PRODUCT_REVISION_LEVEL [%u]\n",
137 pFirst ? get_unaligned_be32(pFirst) : ~0U);
138
139 pFirst = get_attrs[a++].val_ptr;
140 OSD_INFO("PRODUCT_SERIAL_NUMBER [%s]\n",
141 (char *)pFirst);
142
143 odi->osdname_len = get_attrs[a].len;
144 /* Avoid NULL for memcmp optimization 0-length is good enough */
145 odi->osdname = kzalloc(odi->osdname_len + 1, GFP_KERNEL);
146 if (odi->osdname_len)
147 memcpy(odi->osdname, get_attrs[a].val_ptr, odi->osdname_len);
148 OSD_INFO("OSD_NAME [%s]\n", odi->osdname);
149 a++;
150
151 pFirst = get_attrs[a++].val_ptr;
152 OSD_INFO("TOTAL_CAPACITY [0x%llx]\n",
153 pFirst ? _LLU(get_unaligned_be64(pFirst)) : ~0ULL);
154
155 pFirst = get_attrs[a++].val_ptr;
156 OSD_INFO("USED_CAPACITY [0x%llx]\n",
157 pFirst ? _LLU(get_unaligned_be64(pFirst)) : ~0ULL);
158
159 pFirst = get_attrs[a++].val_ptr;
160 OSD_INFO("NUMBER_OF_PARTITIONS [%llu]\n",
161 pFirst ? _LLU(get_unaligned_be64(pFirst)) : ~0ULL);
162
163 if (a >= nelem)
164 goto out;
165
166 /* FIXME: Where are the time utilities */
167 pFirst = get_attrs[a++].val_ptr;
168 OSD_INFO("CLOCK [0x%02x%02x%02x%02x%02x%02x]\n",
169 ((char *)pFirst)[0], ((char *)pFirst)[1],
170 ((char *)pFirst)[2], ((char *)pFirst)[3],
171 ((char *)pFirst)[4], ((char *)pFirst)[5]);
172
173 if (a < nelem) { /* IBM-OSD-SIM bug, Might not have it */
174 unsigned len = get_attrs[a].len;
175 char sid_dump[32*4 + 2]; /* 2nibbles+space+ASCII */
176
177 hex_dump_to_buffer(get_attrs[a].val_ptr, len, 32, 1,
178 sid_dump, sizeof(sid_dump), true);
179 OSD_INFO("OSD_SYSTEM_ID(%d)\n"
180 " [%s]\n", len, sid_dump);
181
182 if (unlikely(len > sizeof(odi->systemid))) {
183 OSD_ERR("OSD Target error: OSD_SYSTEM_ID too long(%d). "
184 "device idetification might not work\n", len);
185 len = sizeof(odi->systemid);
186 }
187 odi->systemid_len = len;
188 memcpy(odi->systemid, get_attrs[a].val_ptr, len);
189 a++;
190 }
191 out:
192 osd_end_request(or);
193 return ret;
194 }
195
196 int osd_auto_detect_ver(struct osd_dev *od,
197 void *caps, struct osd_dev_info *odi)
198 {
199 int ret;
200
201 /* Auto-detect the osd version */
202 ret = _osd_get_print_system_info(od, caps, odi);
203 if (ret) {
204 osd_dev_set_ver(od, OSD_VER1);
205 OSD_DEBUG("converting to OSD1\n");
206 ret = _osd_get_print_system_info(od, caps, odi);
207 }
208
209 return ret;
210 }
211 EXPORT_SYMBOL(osd_auto_detect_ver);
212
213 static unsigned _osd_req_cdb_len(struct osd_request *or)
214 {
215 return osd_req_is_ver1(or) ? OSDv1_TOTAL_CDB_LEN : OSD_TOTAL_CDB_LEN;
216 }
217
218 static unsigned _osd_req_alist_elem_size(struct osd_request *or, unsigned len)
219 {
220 return osd_req_is_ver1(or) ?
221 osdv1_attr_list_elem_size(len) :
222 osdv2_attr_list_elem_size(len);
223 }
224
225 static void _osd_req_alist_elem_encode(struct osd_request *or,
226 void *attr_last, const struct osd_attr *oa)
227 {
228 if (osd_req_is_ver1(or)) {
229 struct osdv1_attributes_list_element *attr = attr_last;
230
231 attr->attr_page = cpu_to_be32(oa->attr_page);
232 attr->attr_id = cpu_to_be32(oa->attr_id);
233 attr->attr_bytes = cpu_to_be16(oa->len);
234 memcpy(attr->attr_val, oa->val_ptr, oa->len);
235 } else {
236 struct osdv2_attributes_list_element *attr = attr_last;
237
238 attr->attr_page = cpu_to_be32(oa->attr_page);
239 attr->attr_id = cpu_to_be32(oa->attr_id);
240 attr->attr_bytes = cpu_to_be16(oa->len);
241 memcpy(attr->attr_val, oa->val_ptr, oa->len);
242 }
243 }
244
245 static int _osd_req_alist_elem_decode(struct osd_request *or,
246 void *cur_p, struct osd_attr *oa, unsigned max_bytes)
247 {
248 unsigned inc;
249 if (osd_req_is_ver1(or)) {
250 struct osdv1_attributes_list_element *attr = cur_p;
251
252 if (max_bytes < sizeof(*attr))
253 return -1;
254
255 oa->len = be16_to_cpu(attr->attr_bytes);
256 inc = _osd_req_alist_elem_size(or, oa->len);
257 if (inc > max_bytes)
258 return -1;
259
260 oa->attr_page = be32_to_cpu(attr->attr_page);
261 oa->attr_id = be32_to_cpu(attr->attr_id);
262
263 /* OSD1: On empty attributes we return a pointer to 2 bytes
264 * of zeros. This keeps similar behaviour with OSD2.
265 * (See below)
266 */
267 oa->val_ptr = likely(oa->len) ? attr->attr_val :
268 (u8 *)&attr->attr_bytes;
269 } else {
270 struct osdv2_attributes_list_element *attr = cur_p;
271
272 if (max_bytes < sizeof(*attr))
273 return -1;
274
275 oa->len = be16_to_cpu(attr->attr_bytes);
276 inc = _osd_req_alist_elem_size(or, oa->len);
277 if (inc > max_bytes)
278 return -1;
279
280 oa->attr_page = be32_to_cpu(attr->attr_page);
281 oa->attr_id = be32_to_cpu(attr->attr_id);
282
283 /* OSD2: For convenience, on empty attributes, we return 8 bytes
284 * of zeros here. This keeps the same behaviour with OSD2r04,
285 * and is nice with null terminating ASCII fields.
286 * oa->val_ptr == NULL marks the end-of-list, or error.
287 */
288 oa->val_ptr = likely(oa->len) ? attr->attr_val : attr->reserved;
289 }
290 return inc;
291 }
292
293 static unsigned _osd_req_alist_size(struct osd_request *or, void *list_head)
294 {
295 return osd_req_is_ver1(or) ?
296 osdv1_list_size(list_head) :
297 osdv2_list_size(list_head);
298 }
299
300 static unsigned _osd_req_sizeof_alist_header(struct osd_request *or)
301 {
302 return osd_req_is_ver1(or) ?
303 sizeof(struct osdv1_attributes_list_header) :
304 sizeof(struct osdv2_attributes_list_header);
305 }
306
307 static void _osd_req_set_alist_type(struct osd_request *or,
308 void *list, int list_type)
309 {
310 if (osd_req_is_ver1(or)) {
311 struct osdv1_attributes_list_header *attr_list = list;
312
313 memset(attr_list, 0, sizeof(*attr_list));
314 attr_list->type = list_type;
315 } else {
316 struct osdv2_attributes_list_header *attr_list = list;
317
318 memset(attr_list, 0, sizeof(*attr_list));
319 attr_list->type = list_type;
320 }
321 }
322
323 static bool _osd_req_is_alist_type(struct osd_request *or,
324 void *list, int list_type)
325 {
326 if (!list)
327 return false;
328
329 if (osd_req_is_ver1(or)) {
330 struct osdv1_attributes_list_header *attr_list = list;
331
332 return attr_list->type == list_type;
333 } else {
334 struct osdv2_attributes_list_header *attr_list = list;
335
336 return attr_list->type == list_type;
337 }
338 }
339
340 /* This is for List-objects not Attributes-Lists */
341 static void _osd_req_encode_olist(struct osd_request *or,
342 struct osd_obj_id_list *list)
343 {
344 struct osd_cdb_head *cdbh = osd_cdb_head(&or->cdb);
345
346 if (osd_req_is_ver1(or)) {
347 cdbh->v1.list_identifier = list->list_identifier;
348 cdbh->v1.start_address = list->continuation_id;
349 } else {
350 cdbh->v2.list_identifier = list->list_identifier;
351 cdbh->v2.start_address = list->continuation_id;
352 }
353 }
354
355 static osd_cdb_offset osd_req_encode_offset(struct osd_request *or,
356 u64 offset, unsigned *padding)
357 {
358 return __osd_encode_offset(offset, padding,
359 osd_req_is_ver1(or) ?
360 OSDv1_OFFSET_MIN_SHIFT : OSD_OFFSET_MIN_SHIFT,
361 OSD_OFFSET_MAX_SHIFT);
362 }
363
364 static struct osd_security_parameters *
365 _osd_req_sec_params(struct osd_request *or)
366 {
367 struct osd_cdb *ocdb = &or->cdb;
368
369 if (osd_req_is_ver1(or))
370 return (struct osd_security_parameters *)&ocdb->v1.sec_params;
371 else
372 return (struct osd_security_parameters *)&ocdb->v2.sec_params;
373 }
374
375 void osd_dev_init(struct osd_dev *osdd, struct scsi_device *scsi_device)
376 {
377 memset(osdd, 0, sizeof(*osdd));
378 osdd->scsi_device = scsi_device;
379 osdd->def_timeout = BLK_DEFAULT_SG_TIMEOUT;
380 #ifdef OSD_VER1_SUPPORT
381 osdd->version = OSD_VER2;
382 #endif
383 /* TODO: Allocate pools for osd_request attributes ... */
384 }
385 EXPORT_SYMBOL(osd_dev_init);
386
387 void osd_dev_fini(struct osd_dev *osdd)
388 {
389 /* TODO: De-allocate pools */
390
391 osdd->scsi_device = NULL;
392 }
393 EXPORT_SYMBOL(osd_dev_fini);
394
395 static struct osd_request *_osd_request_alloc(gfp_t gfp)
396 {
397 struct osd_request *or;
398
399 /* TODO: Use mempool with one saved request */
400 or = kzalloc(sizeof(*or), gfp);
401 return or;
402 }
403
404 static void _osd_request_free(struct osd_request *or)
405 {
406 kfree(or);
407 }
408
409 struct osd_request *osd_start_request(struct osd_dev *dev, gfp_t gfp)
410 {
411 struct osd_request *or;
412
413 or = _osd_request_alloc(gfp);
414 if (!or)
415 return NULL;
416
417 or->osd_dev = dev;
418 or->alloc_flags = gfp;
419 or->timeout = dev->def_timeout;
420 or->retries = OSD_REQ_RETRIES;
421
422 return or;
423 }
424 EXPORT_SYMBOL(osd_start_request);
425
426 static void _osd_free_seg(struct osd_request *or __unused,
427 struct _osd_req_data_segment *seg)
428 {
429 if (!seg->buff || !seg->alloc_size)
430 return;
431
432 kfree(seg->buff);
433 seg->buff = NULL;
434 seg->alloc_size = 0;
435 }
436
437 static void _put_request(struct request *rq)
438 {
439 /*
440 * If osd_finalize_request() was called but the request was not
441 * executed through the block layer, then we must release BIOs.
442 * TODO: Keep error code in or->async_error. Need to audit all
443 * code paths.
444 */
445 if (unlikely(rq->bio))
446 blk_end_request(rq, -ENOMEM, blk_rq_bytes(rq));
447 else
448 blk_put_request(rq);
449 }
450
451 void osd_end_request(struct osd_request *or)
452 {
453 struct request *rq = or->request;
454
455 _osd_free_seg(or, &or->set_attr);
456 _osd_free_seg(or, &or->enc_get_attr);
457 _osd_free_seg(or, &or->get_attr);
458
459 if (rq) {
460 if (rq->next_rq) {
461 _put_request(rq->next_rq);
462 rq->next_rq = NULL;
463 }
464
465 _put_request(rq);
466 }
467 _osd_request_free(or);
468 }
469 EXPORT_SYMBOL(osd_end_request);
470
471 static void _set_error_resid(struct osd_request *or, struct request *req,
472 int error)
473 {
474 or->async_error = error;
475 or->req_errors = req->errors ? : error;
476 or->sense_len = req->sense_len;
477 if (or->out.req)
478 or->out.residual = or->out.req->resid_len;
479 if (or->in.req)
480 or->in.residual = or->in.req->resid_len;
481 }
482
483 int osd_execute_request(struct osd_request *or)
484 {
485 int error = blk_execute_rq(or->request->q, NULL, or->request, 0);
486
487 _set_error_resid(or, or->request, error);
488 return error;
489 }
490 EXPORT_SYMBOL(osd_execute_request);
491
492 static void osd_request_async_done(struct request *req, int error)
493 {
494 struct osd_request *or = req->end_io_data;
495
496 _set_error_resid(or, req, error);
497 if (req->next_rq) {
498 __blk_put_request(req->q, req->next_rq);
499 req->next_rq = NULL;
500 }
501
502 __blk_put_request(req->q, req);
503 or->request = NULL;
504 or->in.req = NULL;
505 or->out.req = NULL;
506
507 if (or->async_done)
508 or->async_done(or, or->async_private);
509 else
510 osd_end_request(or);
511 }
512
513 int osd_execute_request_async(struct osd_request *or,
514 osd_req_done_fn *done, void *private)
515 {
516 or->request->end_io_data = or;
517 or->async_private = private;
518 or->async_done = done;
519
520 blk_execute_rq_nowait(or->request->q, NULL, or->request, 0,
521 osd_request_async_done);
522 return 0;
523 }
524 EXPORT_SYMBOL(osd_execute_request_async);
525
526 u8 sg_out_pad_buffer[1 << OSDv1_OFFSET_MIN_SHIFT];
527 u8 sg_in_pad_buffer[1 << OSDv1_OFFSET_MIN_SHIFT];
528
529 static int _osd_realloc_seg(struct osd_request *or,
530 struct _osd_req_data_segment *seg, unsigned max_bytes)
531 {
532 void *buff;
533
534 if (seg->alloc_size >= max_bytes)
535 return 0;
536
537 buff = krealloc(seg->buff, max_bytes, or->alloc_flags);
538 if (!buff) {
539 OSD_ERR("Failed to Realloc %d-bytes was-%d\n", max_bytes,
540 seg->alloc_size);
541 return -ENOMEM;
542 }
543
544 memset(buff + seg->alloc_size, 0, max_bytes - seg->alloc_size);
545 seg->buff = buff;
546 seg->alloc_size = max_bytes;
547 return 0;
548 }
549
550 static int _alloc_set_attr_list(struct osd_request *or,
551 const struct osd_attr *oa, unsigned nelem, unsigned add_bytes)
552 {
553 unsigned total_bytes = add_bytes;
554
555 for (; nelem; --nelem, ++oa)
556 total_bytes += _osd_req_alist_elem_size(or, oa->len);
557
558 OSD_DEBUG("total_bytes=%d\n", total_bytes);
559 return _osd_realloc_seg(or, &or->set_attr, total_bytes);
560 }
561
562 static int _alloc_get_attr_desc(struct osd_request *or, unsigned max_bytes)
563 {
564 OSD_DEBUG("total_bytes=%d\n", max_bytes);
565 return _osd_realloc_seg(or, &or->enc_get_attr, max_bytes);
566 }
567
568 static int _alloc_get_attr_list(struct osd_request *or)
569 {
570 OSD_DEBUG("total_bytes=%d\n", or->get_attr.total_bytes);
571 return _osd_realloc_seg(or, &or->get_attr, or->get_attr.total_bytes);
572 }
573
574 /*
575 * Common to all OSD commands
576 */
577
578 static void _osdv1_req_encode_common(struct osd_request *or,
579 __be16 act, const struct osd_obj_id *obj, u64 offset, u64 len)
580 {
581 struct osdv1_cdb *ocdb = &or->cdb.v1;
582
583 /*
584 * For speed, the commands
585 * OSD_ACT_PERFORM_SCSI_COMMAND , V1 0x8F7E, V2 0x8F7C
586 * OSD_ACT_SCSI_TASK_MANAGEMENT , V1 0x8F7F, V2 0x8F7D
587 * are not supported here. Should pass zero and set after the call
588 */
589 act &= cpu_to_be16(~0x0080); /* V1 action code */
590
591 OSD_DEBUG("OSDv1 execute opcode 0x%x\n", be16_to_cpu(act));
592
593 ocdb->h.varlen_cdb.opcode = VARIABLE_LENGTH_CMD;
594 ocdb->h.varlen_cdb.additional_cdb_length = OSD_ADDITIONAL_CDB_LENGTH;
595 ocdb->h.varlen_cdb.service_action = act;
596
597 ocdb->h.partition = cpu_to_be64(obj->partition);
598 ocdb->h.object = cpu_to_be64(obj->id);
599 ocdb->h.v1.length = cpu_to_be64(len);
600 ocdb->h.v1.start_address = cpu_to_be64(offset);
601 }
602
603 static void _osdv2_req_encode_common(struct osd_request *or,
604 __be16 act, const struct osd_obj_id *obj, u64 offset, u64 len)
605 {
606 struct osdv2_cdb *ocdb = &or->cdb.v2;
607
608 OSD_DEBUG("OSDv2 execute opcode 0x%x\n", be16_to_cpu(act));
609
610 ocdb->h.varlen_cdb.opcode = VARIABLE_LENGTH_CMD;
611 ocdb->h.varlen_cdb.additional_cdb_length = OSD_ADDITIONAL_CDB_LENGTH;
612 ocdb->h.varlen_cdb.service_action = act;
613
614 ocdb->h.partition = cpu_to_be64(obj->partition);
615 ocdb->h.object = cpu_to_be64(obj->id);
616 ocdb->h.v2.length = cpu_to_be64(len);
617 ocdb->h.v2.start_address = cpu_to_be64(offset);
618 }
619
620 static void _osd_req_encode_common(struct osd_request *or,
621 __be16 act, const struct osd_obj_id *obj, u64 offset, u64 len)
622 {
623 if (osd_req_is_ver1(or))
624 _osdv1_req_encode_common(or, act, obj, offset, len);
625 else
626 _osdv2_req_encode_common(or, act, obj, offset, len);
627 }
628
629 /*
630 * Device commands
631 */
632 /*TODO: void osd_req_set_master_seed_xchg(struct osd_request *, ...); */
633 /*TODO: void osd_req_set_master_key(struct osd_request *, ...); */
634
635 void osd_req_format(struct osd_request *or, u64 tot_capacity)
636 {
637 _osd_req_encode_common(or, OSD_ACT_FORMAT_OSD, &osd_root_object, 0,
638 tot_capacity);
639 }
640 EXPORT_SYMBOL(osd_req_format);
641
642 int osd_req_list_dev_partitions(struct osd_request *or,
643 osd_id initial_id, struct osd_obj_id_list *list, unsigned nelem)
644 {
645 return osd_req_list_partition_objects(or, 0, initial_id, list, nelem);
646 }
647 EXPORT_SYMBOL(osd_req_list_dev_partitions);
648
649 static void _osd_req_encode_flush(struct osd_request *or,
650 enum osd_options_flush_scope_values op)
651 {
652 struct osd_cdb_head *ocdb = osd_cdb_head(&or->cdb);
653
654 ocdb->command_specific_options = op;
655 }
656
657 void osd_req_flush_obsd(struct osd_request *or,
658 enum osd_options_flush_scope_values op)
659 {
660 _osd_req_encode_common(or, OSD_ACT_FLUSH_OSD, &osd_root_object, 0, 0);
661 _osd_req_encode_flush(or, op);
662 }
663 EXPORT_SYMBOL(osd_req_flush_obsd);
664
665 /*TODO: void osd_req_perform_scsi_command(struct osd_request *,
666 const u8 *cdb, ...); */
667 /*TODO: void osd_req_task_management(struct osd_request *, ...); */
668
669 /*
670 * Partition commands
671 */
672 static void _osd_req_encode_partition(struct osd_request *or,
673 __be16 act, osd_id partition)
674 {
675 struct osd_obj_id par = {
676 .partition = partition,
677 .id = 0,
678 };
679
680 _osd_req_encode_common(or, act, &par, 0, 0);
681 }
682
683 void osd_req_create_partition(struct osd_request *or, osd_id partition)
684 {
685 _osd_req_encode_partition(or, OSD_ACT_CREATE_PARTITION, partition);
686 }
687 EXPORT_SYMBOL(osd_req_create_partition);
688
689 void osd_req_remove_partition(struct osd_request *or, osd_id partition)
690 {
691 _osd_req_encode_partition(or, OSD_ACT_REMOVE_PARTITION, partition);
692 }
693 EXPORT_SYMBOL(osd_req_remove_partition);
694
695 /*TODO: void osd_req_set_partition_key(struct osd_request *,
696 osd_id partition, u8 new_key_id[OSD_CRYPTO_KEYID_SIZE],
697 u8 seed[OSD_CRYPTO_SEED_SIZE]); */
698
699 static int _osd_req_list_objects(struct osd_request *or,
700 __be16 action, const struct osd_obj_id *obj, osd_id initial_id,
701 struct osd_obj_id_list *list, unsigned nelem)
702 {
703 struct request_queue *q = osd_request_queue(or->osd_dev);
704 u64 len = nelem * sizeof(osd_id) + sizeof(*list);
705 struct bio *bio;
706
707 _osd_req_encode_common(or, action, obj, (u64)initial_id, len);
708
709 if (list->list_identifier)
710 _osd_req_encode_olist(or, list);
711
712 WARN_ON(or->in.bio);
713 bio = bio_map_kern(q, list, len, or->alloc_flags);
714 if (IS_ERR(bio)) {
715 OSD_ERR("!!! Failed to allocate list_objects BIO\n");
716 return PTR_ERR(bio);
717 }
718
719 bio->bi_rw &= ~(1 << BIO_RW);
720 or->in.bio = bio;
721 or->in.total_bytes = bio->bi_size;
722 return 0;
723 }
724
725 int osd_req_list_partition_collections(struct osd_request *or,
726 osd_id partition, osd_id initial_id, struct osd_obj_id_list *list,
727 unsigned nelem)
728 {
729 struct osd_obj_id par = {
730 .partition = partition,
731 .id = 0,
732 };
733
734 return osd_req_list_collection_objects(or, &par, initial_id, list,
735 nelem);
736 }
737 EXPORT_SYMBOL(osd_req_list_partition_collections);
738
739 int osd_req_list_partition_objects(struct osd_request *or,
740 osd_id partition, osd_id initial_id, struct osd_obj_id_list *list,
741 unsigned nelem)
742 {
743 struct osd_obj_id par = {
744 .partition = partition,
745 .id = 0,
746 };
747
748 return _osd_req_list_objects(or, OSD_ACT_LIST, &par, initial_id, list,
749 nelem);
750 }
751 EXPORT_SYMBOL(osd_req_list_partition_objects);
752
753 void osd_req_flush_partition(struct osd_request *or,
754 osd_id partition, enum osd_options_flush_scope_values op)
755 {
756 _osd_req_encode_partition(or, OSD_ACT_FLUSH_PARTITION, partition);
757 _osd_req_encode_flush(or, op);
758 }
759 EXPORT_SYMBOL(osd_req_flush_partition);
760
761 /*
762 * Collection commands
763 */
764 /*TODO: void osd_req_create_collection(struct osd_request *,
765 const struct osd_obj_id *); */
766 /*TODO: void osd_req_remove_collection(struct osd_request *,
767 const struct osd_obj_id *); */
768
769 int osd_req_list_collection_objects(struct osd_request *or,
770 const struct osd_obj_id *obj, osd_id initial_id,
771 struct osd_obj_id_list *list, unsigned nelem)
772 {
773 return _osd_req_list_objects(or, OSD_ACT_LIST_COLLECTION, obj,
774 initial_id, list, nelem);
775 }
776 EXPORT_SYMBOL(osd_req_list_collection_objects);
777
778 /*TODO: void query(struct osd_request *, ...); V2 */
779
780 void osd_req_flush_collection(struct osd_request *or,
781 const struct osd_obj_id *obj, enum osd_options_flush_scope_values op)
782 {
783 _osd_req_encode_common(or, OSD_ACT_FLUSH_PARTITION, obj, 0, 0);
784 _osd_req_encode_flush(or, op);
785 }
786 EXPORT_SYMBOL(osd_req_flush_collection);
787
788 /*TODO: void get_member_attrs(struct osd_request *, ...); V2 */
789 /*TODO: void set_member_attrs(struct osd_request *, ...); V2 */
790
791 /*
792 * Object commands
793 */
794 void osd_req_create_object(struct osd_request *or, struct osd_obj_id *obj)
795 {
796 _osd_req_encode_common(or, OSD_ACT_CREATE, obj, 0, 0);
797 }
798 EXPORT_SYMBOL(osd_req_create_object);
799
800 void osd_req_remove_object(struct osd_request *or, struct osd_obj_id *obj)
801 {
802 _osd_req_encode_common(or, OSD_ACT_REMOVE, obj, 0, 0);
803 }
804 EXPORT_SYMBOL(osd_req_remove_object);
805
806
807 /*TODO: void osd_req_create_multi(struct osd_request *or,
808 struct osd_obj_id *first, struct osd_obj_id_list *list, unsigned nelem);
809 */
810
811 void osd_req_write(struct osd_request *or,
812 const struct osd_obj_id *obj, u64 offset,
813 struct bio *bio, u64 len)
814 {
815 _osd_req_encode_common(or, OSD_ACT_WRITE, obj, offset, len);
816 WARN_ON(or->out.bio || or->out.total_bytes);
817 WARN_ON(0 == bio_rw_flagged(bio, BIO_RW));
818 or->out.bio = bio;
819 or->out.total_bytes = len;
820 }
821 EXPORT_SYMBOL(osd_req_write);
822
823 int osd_req_write_kern(struct osd_request *or,
824 const struct osd_obj_id *obj, u64 offset, void* buff, u64 len)
825 {
826 struct request_queue *req_q = osd_request_queue(or->osd_dev);
827 struct bio *bio = bio_map_kern(req_q, buff, len, GFP_KERNEL);
828
829 if (IS_ERR(bio))
830 return PTR_ERR(bio);
831
832 bio->bi_rw |= (1 << BIO_RW); /* FIXME: bio_set_dir() */
833 osd_req_write(or, obj, offset, bio, len);
834 return 0;
835 }
836 EXPORT_SYMBOL(osd_req_write_kern);
837
838 /*TODO: void osd_req_append(struct osd_request *,
839 const struct osd_obj_id *, struct bio *data_out); */
840 /*TODO: void osd_req_create_write(struct osd_request *,
841 const struct osd_obj_id *, struct bio *data_out, u64 offset); */
842 /*TODO: void osd_req_clear(struct osd_request *,
843 const struct osd_obj_id *, u64 offset, u64 len); */
844 /*TODO: void osd_req_punch(struct osd_request *,
845 const struct osd_obj_id *, u64 offset, u64 len); V2 */
846
847 void osd_req_flush_object(struct osd_request *or,
848 const struct osd_obj_id *obj, enum osd_options_flush_scope_values op,
849 /*V2*/ u64 offset, /*V2*/ u64 len)
850 {
851 if (unlikely(osd_req_is_ver1(or) && (offset || len))) {
852 OSD_DEBUG("OSD Ver1 flush on specific range ignored\n");
853 offset = 0;
854 len = 0;
855 }
856
857 _osd_req_encode_common(or, OSD_ACT_FLUSH, obj, offset, len);
858 _osd_req_encode_flush(or, op);
859 }
860 EXPORT_SYMBOL(osd_req_flush_object);
861
862 void osd_req_read(struct osd_request *or,
863 const struct osd_obj_id *obj, u64 offset,
864 struct bio *bio, u64 len)
865 {
866 _osd_req_encode_common(or, OSD_ACT_READ, obj, offset, len);
867 WARN_ON(or->in.bio || or->in.total_bytes);
868 WARN_ON(1 == bio_rw_flagged(bio, BIO_RW));
869 or->in.bio = bio;
870 or->in.total_bytes = len;
871 }
872 EXPORT_SYMBOL(osd_req_read);
873
874 int osd_req_read_kern(struct osd_request *or,
875 const struct osd_obj_id *obj, u64 offset, void* buff, u64 len)
876 {
877 struct request_queue *req_q = osd_request_queue(or->osd_dev);
878 struct bio *bio = bio_map_kern(req_q, buff, len, GFP_KERNEL);
879
880 if (IS_ERR(bio))
881 return PTR_ERR(bio);
882
883 osd_req_read(or, obj, offset, bio, len);
884 return 0;
885 }
886 EXPORT_SYMBOL(osd_req_read_kern);
887
888 void osd_req_get_attributes(struct osd_request *or,
889 const struct osd_obj_id *obj)
890 {
891 _osd_req_encode_common(or, OSD_ACT_GET_ATTRIBUTES, obj, 0, 0);
892 }
893 EXPORT_SYMBOL(osd_req_get_attributes);
894
895 void osd_req_set_attributes(struct osd_request *or,
896 const struct osd_obj_id *obj)
897 {
898 _osd_req_encode_common(or, OSD_ACT_SET_ATTRIBUTES, obj, 0, 0);
899 }
900 EXPORT_SYMBOL(osd_req_set_attributes);
901
902 /*
903 * Attributes List-mode
904 */
905
906 int osd_req_add_set_attr_list(struct osd_request *or,
907 const struct osd_attr *oa, unsigned nelem)
908 {
909 unsigned total_bytes = or->set_attr.total_bytes;
910 void *attr_last;
911 int ret;
912
913 if (or->attributes_mode &&
914 or->attributes_mode != OSD_CDB_GET_SET_ATTR_LISTS) {
915 WARN_ON(1);
916 return -EINVAL;
917 }
918 or->attributes_mode = OSD_CDB_GET_SET_ATTR_LISTS;
919
920 if (!total_bytes) { /* first-time: allocate and put list header */
921 total_bytes = _osd_req_sizeof_alist_header(or);
922 ret = _alloc_set_attr_list(or, oa, nelem, total_bytes);
923 if (ret)
924 return ret;
925 _osd_req_set_alist_type(or, or->set_attr.buff,
926 OSD_ATTR_LIST_SET_RETRIEVE);
927 }
928 attr_last = or->set_attr.buff + total_bytes;
929
930 for (; nelem; --nelem) {
931 unsigned elem_size = _osd_req_alist_elem_size(or, oa->len);
932
933 total_bytes += elem_size;
934 if (unlikely(or->set_attr.alloc_size < total_bytes)) {
935 or->set_attr.total_bytes = total_bytes - elem_size;
936 ret = _alloc_set_attr_list(or, oa, nelem, total_bytes);
937 if (ret)
938 return ret;
939 attr_last =
940 or->set_attr.buff + or->set_attr.total_bytes;
941 }
942
943 _osd_req_alist_elem_encode(or, attr_last, oa);
944
945 attr_last += elem_size;
946 ++oa;
947 }
948
949 or->set_attr.total_bytes = total_bytes;
950 return 0;
951 }
952 EXPORT_SYMBOL(osd_req_add_set_attr_list);
953
954 static int _req_append_segment(struct osd_request *or,
955 unsigned padding, struct _osd_req_data_segment *seg,
956 struct _osd_req_data_segment *last_seg, struct _osd_io_info *io)
957 {
958 void *pad_buff;
959 int ret;
960
961 if (padding) {
962 /* check if we can just add it to last buffer */
963 if (last_seg &&
964 (padding <= last_seg->alloc_size - last_seg->total_bytes))
965 pad_buff = last_seg->buff + last_seg->total_bytes;
966 else
967 pad_buff = io->pad_buff;
968
969 ret = blk_rq_map_kern(io->req->q, io->req, pad_buff, padding,
970 or->alloc_flags);
971 if (ret)
972 return ret;
973 io->total_bytes += padding;
974 }
975
976 ret = blk_rq_map_kern(io->req->q, io->req, seg->buff, seg->total_bytes,
977 or->alloc_flags);
978 if (ret)
979 return ret;
980
981 io->total_bytes += seg->total_bytes;
982 OSD_DEBUG("padding=%d buff=%p total_bytes=%d\n", padding, seg->buff,
983 seg->total_bytes);
984 return 0;
985 }
986
987 static int _osd_req_finalize_set_attr_list(struct osd_request *or)
988 {
989 struct osd_cdb_head *cdbh = osd_cdb_head(&or->cdb);
990 unsigned padding;
991 int ret;
992
993 if (!or->set_attr.total_bytes) {
994 cdbh->attrs_list.set_attr_offset = OSD_OFFSET_UNUSED;
995 return 0;
996 }
997
998 cdbh->attrs_list.set_attr_bytes = cpu_to_be32(or->set_attr.total_bytes);
999 cdbh->attrs_list.set_attr_offset =
1000 osd_req_encode_offset(or, or->out.total_bytes, &padding);
1001
1002 ret = _req_append_segment(or, padding, &or->set_attr,
1003 or->out.last_seg, &or->out);
1004 if (ret)
1005 return ret;
1006
1007 or->out.last_seg = &or->set_attr;
1008 return 0;
1009 }
1010
1011 int osd_req_add_get_attr_list(struct osd_request *or,
1012 const struct osd_attr *oa, unsigned nelem)
1013 {
1014 unsigned total_bytes = or->enc_get_attr.total_bytes;
1015 void *attr_last;
1016 int ret;
1017
1018 if (or->attributes_mode &&
1019 or->attributes_mode != OSD_CDB_GET_SET_ATTR_LISTS) {
1020 WARN_ON(1);
1021 return -EINVAL;
1022 }
1023 or->attributes_mode = OSD_CDB_GET_SET_ATTR_LISTS;
1024
1025 /* first time calc data-in list header size */
1026 if (!or->get_attr.total_bytes)
1027 or->get_attr.total_bytes = _osd_req_sizeof_alist_header(or);
1028
1029 /* calc data-out info */
1030 if (!total_bytes) { /* first-time: allocate and put list header */
1031 unsigned max_bytes;
1032
1033 total_bytes = _osd_req_sizeof_alist_header(or);
1034 max_bytes = total_bytes +
1035 nelem * sizeof(struct osd_attributes_list_attrid);
1036 ret = _alloc_get_attr_desc(or, max_bytes);
1037 if (ret)
1038 return ret;
1039
1040 _osd_req_set_alist_type(or, or->enc_get_attr.buff,
1041 OSD_ATTR_LIST_GET);
1042 }
1043 attr_last = or->enc_get_attr.buff + total_bytes;
1044
1045 for (; nelem; --nelem) {
1046 struct osd_attributes_list_attrid *attrid;
1047 const unsigned cur_size = sizeof(*attrid);
1048
1049 total_bytes += cur_size;
1050 if (unlikely(or->enc_get_attr.alloc_size < total_bytes)) {
1051 or->enc_get_attr.total_bytes = total_bytes - cur_size;
1052 ret = _alloc_get_attr_desc(or,
1053 total_bytes + nelem * sizeof(*attrid));
1054 if (ret)
1055 return ret;
1056 attr_last = or->enc_get_attr.buff +
1057 or->enc_get_attr.total_bytes;
1058 }
1059
1060 attrid = attr_last;
1061 attrid->attr_page = cpu_to_be32(oa->attr_page);
1062 attrid->attr_id = cpu_to_be32(oa->attr_id);
1063
1064 attr_last += cur_size;
1065
1066 /* calc data-in size */
1067 or->get_attr.total_bytes +=
1068 _osd_req_alist_elem_size(or, oa->len);
1069 ++oa;
1070 }
1071
1072 or->enc_get_attr.total_bytes = total_bytes;
1073
1074 OSD_DEBUG(
1075 "get_attr.total_bytes=%u(%u) enc_get_attr.total_bytes=%u(%Zu)\n",
1076 or->get_attr.total_bytes,
1077 or->get_attr.total_bytes - _osd_req_sizeof_alist_header(or),
1078 or->enc_get_attr.total_bytes,
1079 (or->enc_get_attr.total_bytes - _osd_req_sizeof_alist_header(or))
1080 / sizeof(struct osd_attributes_list_attrid));
1081
1082 return 0;
1083 }
1084 EXPORT_SYMBOL(osd_req_add_get_attr_list);
1085
1086 static int _osd_req_finalize_get_attr_list(struct osd_request *or)
1087 {
1088 struct osd_cdb_head *cdbh = osd_cdb_head(&or->cdb);
1089 unsigned out_padding;
1090 unsigned in_padding;
1091 int ret;
1092
1093 if (!or->enc_get_attr.total_bytes) {
1094 cdbh->attrs_list.get_attr_desc_offset = OSD_OFFSET_UNUSED;
1095 cdbh->attrs_list.get_attr_offset = OSD_OFFSET_UNUSED;
1096 return 0;
1097 }
1098
1099 ret = _alloc_get_attr_list(or);
1100 if (ret)
1101 return ret;
1102
1103 /* The out-going buffer info update */
1104 OSD_DEBUG("out-going\n");
1105 cdbh->attrs_list.get_attr_desc_bytes =
1106 cpu_to_be32(or->enc_get_attr.total_bytes);
1107
1108 cdbh->attrs_list.get_attr_desc_offset =
1109 osd_req_encode_offset(or, or->out.total_bytes, &out_padding);
1110
1111 ret = _req_append_segment(or, out_padding, &or->enc_get_attr,
1112 or->out.last_seg, &or->out);
1113 if (ret)
1114 return ret;
1115 or->out.last_seg = &or->enc_get_attr;
1116
1117 /* The incoming buffer info update */
1118 OSD_DEBUG("in-coming\n");
1119 cdbh->attrs_list.get_attr_alloc_length =
1120 cpu_to_be32(or->get_attr.total_bytes);
1121
1122 cdbh->attrs_list.get_attr_offset =
1123 osd_req_encode_offset(or, or->in.total_bytes, &in_padding);
1124
1125 ret = _req_append_segment(or, in_padding, &or->get_attr, NULL,
1126 &or->in);
1127 if (ret)
1128 return ret;
1129 or->in.last_seg = &or->get_attr;
1130
1131 return 0;
1132 }
1133
1134 int osd_req_decode_get_attr_list(struct osd_request *or,
1135 struct osd_attr *oa, int *nelem, void **iterator)
1136 {
1137 unsigned cur_bytes, returned_bytes;
1138 int n;
1139 const unsigned sizeof_attr_list = _osd_req_sizeof_alist_header(or);
1140 void *cur_p;
1141
1142 if (!_osd_req_is_alist_type(or, or->get_attr.buff,
1143 OSD_ATTR_LIST_SET_RETRIEVE)) {
1144 oa->attr_page = 0;
1145 oa->attr_id = 0;
1146 oa->val_ptr = NULL;
1147 oa->len = 0;
1148 *iterator = NULL;
1149 return 0;
1150 }
1151
1152 if (*iterator) {
1153 BUG_ON((*iterator < or->get_attr.buff) ||
1154 (or->get_attr.buff + or->get_attr.alloc_size < *iterator));
1155 cur_p = *iterator;
1156 cur_bytes = (*iterator - or->get_attr.buff) - sizeof_attr_list;
1157 returned_bytes = or->get_attr.total_bytes;
1158 } else { /* first time decode the list header */
1159 cur_bytes = sizeof_attr_list;
1160 returned_bytes = _osd_req_alist_size(or, or->get_attr.buff) +
1161 sizeof_attr_list;
1162
1163 cur_p = or->get_attr.buff + sizeof_attr_list;
1164
1165 if (returned_bytes > or->get_attr.alloc_size) {
1166 OSD_DEBUG("target report: space was not big enough! "
1167 "Allocate=%u Needed=%u\n",
1168 or->get_attr.alloc_size,
1169 returned_bytes + sizeof_attr_list);
1170
1171 returned_bytes =
1172 or->get_attr.alloc_size - sizeof_attr_list;
1173 }
1174 or->get_attr.total_bytes = returned_bytes;
1175 }
1176
1177 for (n = 0; (n < *nelem) && (cur_bytes < returned_bytes); ++n) {
1178 int inc = _osd_req_alist_elem_decode(or, cur_p, oa,
1179 returned_bytes - cur_bytes);
1180
1181 if (inc < 0) {
1182 OSD_ERR("BAD FOOD from target. list not valid!"
1183 "c=%d r=%d n=%d\n",
1184 cur_bytes, returned_bytes, n);
1185 oa->val_ptr = NULL;
1186 cur_bytes = returned_bytes; /* break the caller loop */
1187 break;
1188 }
1189
1190 cur_bytes += inc;
1191 cur_p += inc;
1192 ++oa;
1193 }
1194
1195 *iterator = (returned_bytes - cur_bytes) ? cur_p : NULL;
1196 *nelem = n;
1197 return returned_bytes - cur_bytes;
1198 }
1199 EXPORT_SYMBOL(osd_req_decode_get_attr_list);
1200
1201 /*
1202 * Attributes Page-mode
1203 */
1204
1205 int osd_req_add_get_attr_page(struct osd_request *or,
1206 u32 page_id, void *attar_page, unsigned max_page_len,
1207 const struct osd_attr *set_one_attr)
1208 {
1209 struct osd_cdb_head *cdbh = osd_cdb_head(&or->cdb);
1210
1211 if (or->attributes_mode &&
1212 or->attributes_mode != OSD_CDB_GET_ATTR_PAGE_SET_ONE) {
1213 WARN_ON(1);
1214 return -EINVAL;
1215 }
1216 or->attributes_mode = OSD_CDB_GET_ATTR_PAGE_SET_ONE;
1217
1218 or->get_attr.buff = attar_page;
1219 or->get_attr.total_bytes = max_page_len;
1220
1221 or->set_attr.buff = set_one_attr->val_ptr;
1222 or->set_attr.total_bytes = set_one_attr->len;
1223
1224 cdbh->attrs_page.get_attr_page = cpu_to_be32(page_id);
1225 cdbh->attrs_page.get_attr_alloc_length = cpu_to_be32(max_page_len);
1226 /* ocdb->attrs_page.get_attr_offset; */
1227
1228 cdbh->attrs_page.set_attr_page = cpu_to_be32(set_one_attr->attr_page);
1229 cdbh->attrs_page.set_attr_id = cpu_to_be32(set_one_attr->attr_id);
1230 cdbh->attrs_page.set_attr_length = cpu_to_be32(set_one_attr->len);
1231 /* ocdb->attrs_page.set_attr_offset; */
1232 return 0;
1233 }
1234 EXPORT_SYMBOL(osd_req_add_get_attr_page);
1235
1236 static int _osd_req_finalize_attr_page(struct osd_request *or)
1237 {
1238 struct osd_cdb_head *cdbh = osd_cdb_head(&or->cdb);
1239 unsigned in_padding, out_padding;
1240 int ret;
1241
1242 /* returned page */
1243 cdbh->attrs_page.get_attr_offset =
1244 osd_req_encode_offset(or, or->in.total_bytes, &in_padding);
1245
1246 ret = _req_append_segment(or, in_padding, &or->get_attr, NULL,
1247 &or->in);
1248 if (ret)
1249 return ret;
1250
1251 /* set one value */
1252 cdbh->attrs_page.set_attr_offset =
1253 osd_req_encode_offset(or, or->out.total_bytes, &out_padding);
1254
1255 ret = _req_append_segment(or, out_padding, &or->enc_get_attr, NULL,
1256 &or->out);
1257 return ret;
1258 }
1259
1260 static inline void osd_sec_parms_set_out_offset(bool is_v1,
1261 struct osd_security_parameters *sec_parms, osd_cdb_offset offset)
1262 {
1263 if (is_v1)
1264 sec_parms->v1.data_out_integrity_check_offset = offset;
1265 else
1266 sec_parms->v2.data_out_integrity_check_offset = offset;
1267 }
1268
1269 static inline void osd_sec_parms_set_in_offset(bool is_v1,
1270 struct osd_security_parameters *sec_parms, osd_cdb_offset offset)
1271 {
1272 if (is_v1)
1273 sec_parms->v1.data_in_integrity_check_offset = offset;
1274 else
1275 sec_parms->v2.data_in_integrity_check_offset = offset;
1276 }
1277
1278 static int _osd_req_finalize_data_integrity(struct osd_request *or,
1279 bool has_in, bool has_out, u64 out_data_bytes, const u8 *cap_key)
1280 {
1281 struct osd_security_parameters *sec_parms = _osd_req_sec_params(or);
1282 int ret;
1283
1284 if (!osd_is_sec_alldata(sec_parms))
1285 return 0;
1286
1287 if (has_out) {
1288 struct _osd_req_data_segment seg = {
1289 .buff = &or->out_data_integ,
1290 .total_bytes = sizeof(or->out_data_integ),
1291 };
1292 unsigned pad;
1293
1294 or->out_data_integ.data_bytes = cpu_to_be64(out_data_bytes);
1295 or->out_data_integ.set_attributes_bytes = cpu_to_be64(
1296 or->set_attr.total_bytes);
1297 or->out_data_integ.get_attributes_bytes = cpu_to_be64(
1298 or->enc_get_attr.total_bytes);
1299
1300 osd_sec_parms_set_out_offset(osd_req_is_ver1(or), sec_parms,
1301 osd_req_encode_offset(or, or->out.total_bytes, &pad));
1302
1303 ret = _req_append_segment(or, pad, &seg, or->out.last_seg,
1304 &or->out);
1305 if (ret)
1306 return ret;
1307 or->out.last_seg = NULL;
1308
1309 /* they are now all chained to request sign them all together */
1310 osd_sec_sign_data(&or->out_data_integ, or->out.req->bio,
1311 cap_key);
1312 }
1313
1314 if (has_in) {
1315 struct _osd_req_data_segment seg = {
1316 .buff = &or->in_data_integ,
1317 .total_bytes = sizeof(or->in_data_integ),
1318 };
1319 unsigned pad;
1320
1321 osd_sec_parms_set_in_offset(osd_req_is_ver1(or), sec_parms,
1322 osd_req_encode_offset(or, or->in.total_bytes, &pad));
1323
1324 ret = _req_append_segment(or, pad, &seg, or->in.last_seg,
1325 &or->in);
1326 if (ret)
1327 return ret;
1328
1329 or->in.last_seg = NULL;
1330 }
1331
1332 return 0;
1333 }
1334
1335 /*
1336 * osd_finalize_request and helpers
1337 */
1338 static struct request *_make_request(struct request_queue *q, bool has_write,
1339 struct _osd_io_info *oii, gfp_t flags)
1340 {
1341 if (oii->bio)
1342 return blk_make_request(q, oii->bio, flags);
1343 else {
1344 struct request *req;
1345
1346 req = blk_get_request(q, has_write ? WRITE : READ, flags);
1347 if (unlikely(!req))
1348 return ERR_PTR(-ENOMEM);
1349
1350 return req;
1351 }
1352 }
1353
1354 static int _init_blk_request(struct osd_request *or,
1355 bool has_in, bool has_out)
1356 {
1357 gfp_t flags = or->alloc_flags;
1358 struct scsi_device *scsi_device = or->osd_dev->scsi_device;
1359 struct request_queue *q = scsi_device->request_queue;
1360 struct request *req;
1361 int ret;
1362
1363 req = _make_request(q, has_out, has_out ? &or->out : &or->in, flags);
1364 if (IS_ERR(req)) {
1365 ret = PTR_ERR(req);
1366 goto out;
1367 }
1368
1369 or->request = req;
1370 req->cmd_type = REQ_TYPE_BLOCK_PC;
1371 req->cmd_flags |= REQ_QUIET;
1372
1373 req->timeout = or->timeout;
1374 req->retries = or->retries;
1375 req->sense = or->sense;
1376 req->sense_len = 0;
1377
1378 if (has_out) {
1379 or->out.req = req;
1380 if (has_in) {
1381 /* allocate bidi request */
1382 req = _make_request(q, false, &or->in, flags);
1383 if (IS_ERR(req)) {
1384 OSD_DEBUG("blk_get_request for bidi failed\n");
1385 ret = PTR_ERR(req);
1386 goto out;
1387 }
1388 req->cmd_type = REQ_TYPE_BLOCK_PC;
1389 or->in.req = or->request->next_rq = req;
1390 }
1391 } else if (has_in)
1392 or->in.req = req;
1393
1394 ret = 0;
1395 out:
1396 OSD_DEBUG("or=%p has_in=%d has_out=%d => %d, %p\n",
1397 or, has_in, has_out, ret, or->request);
1398 return ret;
1399 }
1400
1401 int osd_finalize_request(struct osd_request *or,
1402 u8 options, const void *cap, const u8 *cap_key)
1403 {
1404 struct osd_cdb_head *cdbh = osd_cdb_head(&or->cdb);
1405 bool has_in, has_out;
1406 u64 out_data_bytes = or->out.total_bytes;
1407 int ret;
1408
1409 if (options & OSD_REQ_FUA)
1410 cdbh->options |= OSD_CDB_FUA;
1411
1412 if (options & OSD_REQ_DPO)
1413 cdbh->options |= OSD_CDB_DPO;
1414
1415 if (options & OSD_REQ_BYPASS_TIMESTAMPS)
1416 cdbh->timestamp_control = OSD_CDB_BYPASS_TIMESTAMPS;
1417
1418 osd_set_caps(&or->cdb, cap);
1419
1420 has_in = or->in.bio || or->get_attr.total_bytes;
1421 has_out = or->out.bio || or->set_attr.total_bytes ||
1422 or->enc_get_attr.total_bytes;
1423
1424 ret = _init_blk_request(or, has_in, has_out);
1425 if (ret) {
1426 OSD_DEBUG("_init_blk_request failed\n");
1427 return ret;
1428 }
1429
1430 or->out.pad_buff = sg_out_pad_buffer;
1431 or->in.pad_buff = sg_in_pad_buffer;
1432
1433 if (!or->attributes_mode)
1434 or->attributes_mode = OSD_CDB_GET_SET_ATTR_LISTS;
1435 cdbh->command_specific_options |= or->attributes_mode;
1436 if (or->attributes_mode == OSD_CDB_GET_ATTR_PAGE_SET_ONE) {
1437 ret = _osd_req_finalize_attr_page(or);
1438 if (ret) {
1439 OSD_DEBUG("_osd_req_finalize_attr_page failed\n");
1440 return ret;
1441 }
1442 } else {
1443 /* TODO: I think that for the GET_ATTR command these 2 should
1444 * be reversed to keep them in execution order (for embeded
1445 * targets with low memory footprint)
1446 */
1447 ret = _osd_req_finalize_set_attr_list(or);
1448 if (ret) {
1449 OSD_DEBUG("_osd_req_finalize_set_attr_list failed\n");
1450 return ret;
1451 }
1452
1453 ret = _osd_req_finalize_get_attr_list(or);
1454 if (ret) {
1455 OSD_DEBUG("_osd_req_finalize_get_attr_list failed\n");
1456 return ret;
1457 }
1458 }
1459
1460 ret = _osd_req_finalize_data_integrity(or, has_in, has_out,
1461 out_data_bytes, cap_key);
1462 if (ret)
1463 return ret;
1464
1465 osd_sec_sign_cdb(&or->cdb, cap_key);
1466
1467 or->request->cmd = or->cdb.buff;
1468 or->request->cmd_len = _osd_req_cdb_len(or);
1469
1470 return 0;
1471 }
1472 EXPORT_SYMBOL(osd_finalize_request);
1473
1474 static bool _is_osd_security_code(int code)
1475 {
1476 return (code == osd_security_audit_value_frozen) ||
1477 (code == osd_security_working_key_frozen) ||
1478 (code == osd_nonce_not_unique) ||
1479 (code == osd_nonce_timestamp_out_of_range) ||
1480 (code == osd_invalid_dataout_buffer_integrity_check_value);
1481 }
1482
1483 #define OSD_SENSE_PRINT1(fmt, a...) \
1484 do { \
1485 if (__cur_sense_need_output) \
1486 OSD_ERR(fmt, ##a); \
1487 } while (0)
1488
1489 #define OSD_SENSE_PRINT2(fmt, a...) OSD_SENSE_PRINT1(" " fmt, ##a)
1490
1491 int osd_req_decode_sense_full(struct osd_request *or,
1492 struct osd_sense_info *osi, bool silent,
1493 struct osd_obj_id *bad_obj_list __unused, int max_obj __unused,
1494 struct osd_attr *bad_attr_list, int max_attr)
1495 {
1496 int sense_len, original_sense_len;
1497 struct osd_sense_info local_osi;
1498 struct scsi_sense_descriptor_based *ssdb;
1499 void *cur_descriptor;
1500 #if (CONFIG_SCSI_OSD_DPRINT_SENSE == 0)
1501 const bool __cur_sense_need_output = false;
1502 #else
1503 bool __cur_sense_need_output = !silent;
1504 #endif
1505 int ret;
1506
1507 if (likely(!or->req_errors))
1508 return 0;
1509
1510 osi = osi ? : &local_osi;
1511 memset(osi, 0, sizeof(*osi));
1512
1513 ssdb = (typeof(ssdb))or->sense;
1514 sense_len = or->sense_len;
1515 if ((sense_len < (int)sizeof(*ssdb) || !ssdb->sense_key)) {
1516 OSD_ERR("Block-layer returned error(0x%x) but "
1517 "sense_len(%u) || key(%d) is empty\n",
1518 or->req_errors, sense_len, ssdb->sense_key);
1519 goto analyze;
1520 }
1521
1522 if ((ssdb->response_code != 0x72) && (ssdb->response_code != 0x73)) {
1523 OSD_ERR("Unrecognized scsi sense: rcode=%x length=%d\n",
1524 ssdb->response_code, sense_len);
1525 goto analyze;
1526 }
1527
1528 osi->key = ssdb->sense_key;
1529 osi->additional_code = be16_to_cpu(ssdb->additional_sense_code);
1530 original_sense_len = ssdb->additional_sense_length + 8;
1531
1532 #if (CONFIG_SCSI_OSD_DPRINT_SENSE == 1)
1533 if (__cur_sense_need_output)
1534 __cur_sense_need_output = (osi->key > scsi_sk_recovered_error);
1535 #endif
1536 OSD_SENSE_PRINT1("Main Sense information key=0x%x length(%d, %d) "
1537 "additional_code=0x%x async_error=%d errors=0x%x\n",
1538 osi->key, original_sense_len, sense_len,
1539 osi->additional_code, or->async_error,
1540 or->req_errors);
1541
1542 if (original_sense_len < sense_len)
1543 sense_len = original_sense_len;
1544
1545 cur_descriptor = ssdb->ssd;
1546 sense_len -= sizeof(*ssdb);
1547 while (sense_len > 0) {
1548 struct scsi_sense_descriptor *ssd = cur_descriptor;
1549 int cur_len = ssd->additional_length + 2;
1550
1551 sense_len -= cur_len;
1552
1553 if (sense_len < 0)
1554 break; /* sense was truncated */
1555
1556 switch (ssd->descriptor_type) {
1557 case scsi_sense_information:
1558 case scsi_sense_command_specific_information:
1559 {
1560 struct scsi_sense_command_specific_data_descriptor
1561 *sscd = cur_descriptor;
1562
1563 osi->command_info =
1564 get_unaligned_be64(&sscd->information) ;
1565 OSD_SENSE_PRINT2(
1566 "command_specific_information 0x%llx \n",
1567 _LLU(osi->command_info));
1568 break;
1569 }
1570 case scsi_sense_key_specific:
1571 {
1572 struct scsi_sense_key_specific_data_descriptor
1573 *ssks = cur_descriptor;
1574
1575 osi->sense_info = get_unaligned_be16(&ssks->value);
1576 OSD_SENSE_PRINT2(
1577 "sense_key_specific_information %u"
1578 "sksv_cd_bpv_bp (0x%x)\n",
1579 osi->sense_info, ssks->sksv_cd_bpv_bp);
1580 break;
1581 }
1582 case osd_sense_object_identification:
1583 { /*FIXME: Keep first not last, Store in array*/
1584 struct osd_sense_identification_data_descriptor
1585 *osidd = cur_descriptor;
1586
1587 osi->not_initiated_command_functions =
1588 le32_to_cpu(osidd->not_initiated_functions);
1589 osi->completed_command_functions =
1590 le32_to_cpu(osidd->completed_functions);
1591 osi->obj.partition = be64_to_cpu(osidd->partition_id);
1592 osi->obj.id = be64_to_cpu(osidd->object_id);
1593 OSD_SENSE_PRINT2(
1594 "object_identification pid=0x%llx oid=0x%llx\n",
1595 _LLU(osi->obj.partition), _LLU(osi->obj.id));
1596 OSD_SENSE_PRINT2(
1597 "not_initiated_bits(%x) "
1598 "completed_command_bits(%x)\n",
1599 osi->not_initiated_command_functions,
1600 osi->completed_command_functions);
1601 break;
1602 }
1603 case osd_sense_response_integrity_check:
1604 {
1605 struct osd_sense_response_integrity_check_descriptor
1606 *osricd = cur_descriptor;
1607 const unsigned len =
1608 sizeof(osricd->integrity_check_value);
1609 char key_dump[len*4 + 2]; /* 2nibbles+space+ASCII */
1610
1611 hex_dump_to_buffer(osricd->integrity_check_value, len,
1612 32, 1, key_dump, sizeof(key_dump), true);
1613 OSD_SENSE_PRINT2("response_integrity [%s]\n", key_dump);
1614 }
1615 case osd_sense_attribute_identification:
1616 {
1617 struct osd_sense_attributes_data_descriptor
1618 *osadd = cur_descriptor;
1619 unsigned len = min(cur_len, sense_len);
1620 struct osd_sense_attr *pattr = osadd->sense_attrs;
1621
1622 while (len >= sizeof(*pattr)) {
1623 u32 attr_page = be32_to_cpu(pattr->attr_page);
1624 u32 attr_id = be32_to_cpu(pattr->attr_id);
1625
1626 if (!osi->attr.attr_page) {
1627 osi->attr.attr_page = attr_page;
1628 osi->attr.attr_id = attr_id;
1629 }
1630
1631 if (bad_attr_list && max_attr) {
1632 bad_attr_list->attr_page = attr_page;
1633 bad_attr_list->attr_id = attr_id;
1634 bad_attr_list++;
1635 max_attr--;
1636 }
1637
1638 len -= sizeof(*pattr);
1639 OSD_SENSE_PRINT2(
1640 "osd_sense_attribute_identification"
1641 "attr_page=0x%x attr_id=0x%x\n",
1642 attr_page, attr_id);
1643 }
1644 }
1645 /*These are not legal for OSD*/
1646 case scsi_sense_field_replaceable_unit:
1647 OSD_SENSE_PRINT2("scsi_sense_field_replaceable_unit\n");
1648 break;
1649 case scsi_sense_stream_commands:
1650 OSD_SENSE_PRINT2("scsi_sense_stream_commands\n");
1651 break;
1652 case scsi_sense_block_commands:
1653 OSD_SENSE_PRINT2("scsi_sense_block_commands\n");
1654 break;
1655 case scsi_sense_ata_return:
1656 OSD_SENSE_PRINT2("scsi_sense_ata_return\n");
1657 break;
1658 default:
1659 if (ssd->descriptor_type <= scsi_sense_Reserved_last)
1660 OSD_SENSE_PRINT2(
1661 "scsi_sense Reserved descriptor (0x%x)",
1662 ssd->descriptor_type);
1663 else
1664 OSD_SENSE_PRINT2(
1665 "scsi_sense Vendor descriptor (0x%x)",
1666 ssd->descriptor_type);
1667 }
1668
1669 cur_descriptor += cur_len;
1670 }
1671
1672 analyze:
1673 if (!osi->key) {
1674 /* scsi sense is Empty, the request was never issued to target
1675 * linux return code might tell us what happened.
1676 */
1677 if (or->async_error == -ENOMEM)
1678 osi->osd_err_pri = OSD_ERR_PRI_RESOURCE;
1679 else
1680 osi->osd_err_pri = OSD_ERR_PRI_UNREACHABLE;
1681 ret = or->async_error;
1682 } else if (osi->key <= scsi_sk_recovered_error) {
1683 osi->osd_err_pri = 0;
1684 ret = 0;
1685 } else if (osi->additional_code == scsi_invalid_field_in_cdb) {
1686 if (osi->cdb_field_offset == OSD_CFO_STARTING_BYTE) {
1687 osi->osd_err_pri = OSD_ERR_PRI_CLEAR_PAGES;
1688 ret = -EFAULT; /* caller should recover from this */
1689 } else if (osi->cdb_field_offset == OSD_CFO_OBJECT_ID) {
1690 osi->osd_err_pri = OSD_ERR_PRI_NOT_FOUND;
1691 ret = -ENOENT;
1692 } else if (osi->cdb_field_offset == OSD_CFO_PERMISSIONS) {
1693 osi->osd_err_pri = OSD_ERR_PRI_NO_ACCESS;
1694 ret = -EACCES;
1695 } else {
1696 osi->osd_err_pri = OSD_ERR_PRI_BAD_CRED;
1697 ret = -EINVAL;
1698 }
1699 } else if (osi->additional_code == osd_quota_error) {
1700 osi->osd_err_pri = OSD_ERR_PRI_NO_SPACE;
1701 ret = -ENOSPC;
1702 } else if (_is_osd_security_code(osi->additional_code)) {
1703 osi->osd_err_pri = OSD_ERR_PRI_BAD_CRED;
1704 ret = -EINVAL;
1705 } else {
1706 osi->osd_err_pri = OSD_ERR_PRI_EIO;
1707 ret = -EIO;
1708 }
1709
1710 if (!or->out.residual)
1711 or->out.residual = or->out.total_bytes;
1712 if (!or->in.residual)
1713 or->in.residual = or->in.total_bytes;
1714
1715 return ret;
1716 }
1717 EXPORT_SYMBOL(osd_req_decode_sense_full);
1718
1719 /*
1720 * Implementation of osd_sec.h API
1721 * TODO: Move to a separate osd_sec.c file at a later stage.
1722 */
1723
1724 enum { OSD_SEC_CAP_V1_ALL_CAPS =
1725 OSD_SEC_CAP_APPEND | OSD_SEC_CAP_OBJ_MGMT | OSD_SEC_CAP_REMOVE |
1726 OSD_SEC_CAP_CREATE | OSD_SEC_CAP_SET_ATTR | OSD_SEC_CAP_GET_ATTR |
1727 OSD_SEC_CAP_WRITE | OSD_SEC_CAP_READ | OSD_SEC_CAP_POL_SEC |
1728 OSD_SEC_CAP_GLOBAL | OSD_SEC_CAP_DEV_MGMT
1729 };
1730
1731 enum { OSD_SEC_CAP_V2_ALL_CAPS =
1732 OSD_SEC_CAP_V1_ALL_CAPS | OSD_SEC_CAP_QUERY | OSD_SEC_CAP_M_OBJECT
1733 };
1734
1735 void osd_sec_init_nosec_doall_caps(void *caps,
1736 const struct osd_obj_id *obj, bool is_collection, const bool is_v1)
1737 {
1738 struct osd_capability *cap = caps;
1739 u8 type;
1740 u8 descriptor_type;
1741
1742 if (likely(obj->id)) {
1743 if (unlikely(is_collection)) {
1744 type = OSD_SEC_OBJ_COLLECTION;
1745 descriptor_type = is_v1 ? OSD_SEC_OBJ_DESC_OBJ :
1746 OSD_SEC_OBJ_DESC_COL;
1747 } else {
1748 type = OSD_SEC_OBJ_USER;
1749 descriptor_type = OSD_SEC_OBJ_DESC_OBJ;
1750 }
1751 WARN_ON(!obj->partition);
1752 } else {
1753 type = obj->partition ? OSD_SEC_OBJ_PARTITION :
1754 OSD_SEC_OBJ_ROOT;
1755 descriptor_type = OSD_SEC_OBJ_DESC_PAR;
1756 }
1757
1758 memset(cap, 0, sizeof(*cap));
1759
1760 cap->h.format = OSD_SEC_CAP_FORMAT_VER1;
1761 cap->h.integrity_algorithm__key_version = 0; /* MAKE_BYTE(0, 0); */
1762 cap->h.security_method = OSD_SEC_NOSEC;
1763 /* cap->expiration_time;
1764 cap->AUDIT[30-10];
1765 cap->discriminator[42-30];
1766 cap->object_created_time; */
1767 cap->h.object_type = type;
1768 osd_sec_set_caps(&cap->h, OSD_SEC_CAP_V1_ALL_CAPS);
1769 cap->h.object_descriptor_type = descriptor_type;
1770 cap->od.obj_desc.policy_access_tag = 0;
1771 cap->od.obj_desc.allowed_partition_id = cpu_to_be64(obj->partition);
1772 cap->od.obj_desc.allowed_object_id = cpu_to_be64(obj->id);
1773 }
1774 EXPORT_SYMBOL(osd_sec_init_nosec_doall_caps);
1775
1776 /* FIXME: Extract version from caps pointer.
1777 * Also Pete's target only supports caps from OSDv1 for now
1778 */
1779 void osd_set_caps(struct osd_cdb *cdb, const void *caps)
1780 {
1781 bool is_ver1 = true;
1782 /* NOTE: They start at same address */
1783 memcpy(&cdb->v1.caps, caps, is_ver1 ? OSDv1_CAP_LEN : OSD_CAP_LEN);
1784 }
1785
1786 bool osd_is_sec_alldata(struct osd_security_parameters *sec_parms __unused)
1787 {
1788 return false;
1789 }
1790
1791 void osd_sec_sign_cdb(struct osd_cdb *ocdb __unused, const u8 *cap_key __unused)
1792 {
1793 }
1794
1795 void osd_sec_sign_data(void *data_integ __unused,
1796 struct bio *bio __unused, const u8 *cap_key __unused)
1797 {
1798 }
1799
1800 /*
1801 * Declared in osd_protocol.h
1802 * 4.12.5 Data-In and Data-Out buffer offsets
1803 * byte offset = mantissa * (2^(exponent+8))
1804 * Returns the smallest allowed encoded offset that contains given @offset
1805 * The actual encoded offset returned is @offset + *@padding.
1806 */
1807 osd_cdb_offset __osd_encode_offset(
1808 u64 offset, unsigned *padding, int min_shift, int max_shift)
1809 {
1810 u64 try_offset = -1, mod, align;
1811 osd_cdb_offset be32_offset;
1812 int shift;
1813
1814 *padding = 0;
1815 if (!offset)
1816 return 0;
1817
1818 for (shift = min_shift; shift < max_shift; ++shift) {
1819 try_offset = offset >> shift;
1820 if (try_offset < (1 << OSD_OFFSET_MAX_BITS))
1821 break;
1822 }
1823
1824 BUG_ON(shift == max_shift);
1825
1826 align = 1 << shift;
1827 mod = offset & (align - 1);
1828 if (mod) {
1829 *padding = align - mod;
1830 try_offset += 1;
1831 }
1832
1833 try_offset |= ((shift - 8) & 0xf) << 28;
1834 be32_offset = cpu_to_be32((u32)try_offset);
1835
1836 OSD_DEBUG("offset=%llu mantissa=%llu exp=%d encoded=%x pad=%d\n",
1837 _LLU(offset), _LLU(try_offset & 0x0FFFFFFF), shift,
1838 be32_offset, *padding);
1839 return be32_offset;
1840 }
Linux with added FPC-III support