12 #include <sys/ioctl.h>
15 #include "mpath_pr_ioctl.h"
16 #include "mpath_persist.h"
17 #include "unaligned.h"
21 #define FILE_NAME_SIZE 256
26 int prin_do_scsi_ioctl(char * dev, int rq_servact, struct prin_resp *resp, int noisy);
27 int mpath_translate_response (char * dev, struct sg_io_hdr io_hdr,
28 SenseData_t *Sensedata);
29 void dumpHex(const char* str, int len, int no_ascii);
30 int prout_do_scsi_ioctl( char * dev, int rq_servact, int rq_scope,
31 unsigned int rq_type, struct prout_param_descriptor *paramp, int noisy);
32 uint32_t format_transportids(struct prout_param_descriptor *paramp);
33 void convert_be32_to_cpu(uint32_t *num);
34 void convert_be16_to_cpu(uint16_t *num);
35 void decode_transport_id(struct prin_fulldescr *fdesc, unsigned char * p, int length);
36 int get_prin_length(int rq_servact);
37 int mpath_isLittleEndian(void);
39 unsigned int mpath_mx_alloc_len;
41 int prout_do_scsi_ioctl(char * dev, int rq_servact, int rq_scope,
42 unsigned int rq_type, struct prout_param_descriptor *paramp, int noisy)
45 int status, paramlen = 24, ret = 0;
48 SenseData_t Sensedata;
49 struct sg_io_hdr io_hdr;
50 char devname[FILE_NAME_SIZE];
53 snprintf(devname, FILE_NAME_SIZE, "/dev/%s",dev);
54 fd = open(devname, O_RDONLY);
56 condlog (1, "%s: unable to open device.", dev);
57 return MPATH_PR_FILE_ERROR;
60 unsigned char cdb[MPATH_PROUT_CMDLEN] =
61 {MPATH_PROUT_CMD, 0, 0, 0, 0, 0, 0, 0, 0, 0};
64 if (paramp->sa_flags & MPATH_F_SPEC_I_PT_MASK)
66 translen = format_transportids(paramp);
67 paramlen = 24 + translen;
73 cdb[1] = (unsigned char)(rq_servact & 0x1f);
74 cdb[2] = (((rq_scope & 0xf) << 4) | (rq_type & 0xf));
75 cdb[7] = (unsigned char)((paramlen >> 8) & 0xff);
76 cdb[8] = (unsigned char)(paramlen & 0xff);
79 condlog(4, "%s: rq_servact = %d", dev, rq_servact);
80 condlog(4, "%s: rq_scope = %d ", dev, rq_scope);
81 condlog(4, "%s: rq_type = %d ", dev, rq_type);
82 condlog(4, "%s: paramlen = %d", dev, paramlen);
86 condlog(4, "%s: Persistent Reservation OUT parameter:", dev);
87 dumpHex((const char *)paramp, paramlen,1);
90 memset(&Sensedata, 0, sizeof(SenseData_t));
91 memset(&io_hdr,0 , sizeof( struct sg_io_hdr));
92 io_hdr.interface_id = 'S';
93 io_hdr.cmd_len = MPATH_PROUT_CMDLEN;
95 io_hdr.sbp = (void *)&Sensedata;
96 io_hdr.mx_sb_len = sizeof (SenseData_t);
97 io_hdr.timeout = TIMEOUT;
100 io_hdr.dxferp = (void *)paramp;
101 io_hdr.dxfer_len = paramlen;
102 io_hdr.dxfer_direction = SG_DXFER_TO_DEV ;
105 io_hdr.dxfer_direction = SG_DXFER_NONE;
107 ret = ioctl(fd, SG_IO, &io_hdr);
110 condlog(0, "%s: ioctl failed %d", dev, ret);
115 condlog(4, "%s: Duration=%u (ms)", dev, io_hdr.duration);
117 status = mpath_translate_response(dev, io_hdr, &Sensedata);
118 condlog(3, "%s: status = %d", dev, status);
120 if (status == MPATH_PR_SENSE_UNIT_ATTENTION && (retry > 0))
123 condlog(3, "%s: retrying for Unit Attention. Remaining retries = %d",
128 if (((status == MPATH_PR_SENSE_NOT_READY )&& (Sensedata.ASC == 0x04)&&
129 (Sensedata.ASCQ == 0x07))&& (retry > 0))
133 condlog(3, "%s: retrying for sense 02/04/07."
134 " Remaining retries = %d", dev, retry);
143 * Helper macro to avoid overflow of prout_param_descriptor in
144 * format_transportids(). Data must not be written past
145 * MPATH_MAX_PARAM_LEN bytes from struct prout_param_descriptor.
147 #define check_overflow(ofs, n, start, label) \
150 offsetof(struct prout_param_descriptor, private_buffer) \
151 > MPATH_MAX_PARAM_LEN) \
158 uint32_t format_transportids(struct prout_param_descriptor *paramp)
160 unsigned int i = 0, len;
161 uint32_t buff_offset = 4;
162 memset(paramp->private_buffer, 0, sizeof(paramp->private_buffer));
163 for (i=0; i < paramp->num_transportid; i++ )
165 uint32_t start_offset = buff_offset;
167 check_overflow(buff_offset, 1, start_offset, end_loop);
168 paramp->private_buffer[buff_offset] = (uint8_t)((paramp->trnptid_list[i]->format_code & 0xff)|
169 (paramp->trnptid_list[i]->protocol_id & 0xff));
171 switch(paramp->trnptid_list[i]->protocol_id)
173 case MPATH_PROTOCOL_ID_FC:
174 check_overflow(buff_offset, 7 + 8 + 8,
175 start_offset, end_loop);
177 memcpy(¶mp->private_buffer[buff_offset], ¶mp->trnptid_list[i]->n_port_name, 8);
181 case MPATH_PROTOCOL_ID_SAS:
182 check_overflow(buff_offset, 3 + 12,
183 start_offset, end_loop);
185 memcpy(¶mp->private_buffer[buff_offset], ¶mp->trnptid_list[i]->sas_address, 8);
188 case MPATH_PROTOCOL_ID_ISCSI:
189 len = (paramp->trnptid_list[i]->iscsi_name[1] & 0xff)+2;
190 check_overflow(buff_offset, 1 + len,
191 start_offset, end_loop);
193 memcpy(¶mp->private_buffer[buff_offset], ¶mp->trnptid_list[i]->iscsi_name,len);
201 paramp->private_buffer[0] = (unsigned char)((buff_offset >> 24) & 0xff);
202 paramp->private_buffer[1] = (unsigned char)((buff_offset >> 16) & 0xff);
203 paramp->private_buffer[2] = (unsigned char)((buff_offset >> 8) & 0xff);
204 paramp->private_buffer[3] = (unsigned char)(buff_offset & 0xff);
209 static void mpath_format_readkeys(struct prin_resp *pr_buff)
211 convert_be32_to_cpu(&pr_buff->prin_descriptor.prin_readkeys.prgeneration);
212 convert_be32_to_cpu(&pr_buff->prin_descriptor.prin_readkeys.additional_length);
215 static void mpath_format_readresv(struct prin_resp *pr_buff)
218 convert_be32_to_cpu(&pr_buff->prin_descriptor.prin_readresv.prgeneration);
219 convert_be32_to_cpu(&pr_buff->prin_descriptor.prin_readresv.additional_length);
224 static void mpath_format_reportcapabilities(struct prin_resp *pr_buff)
226 convert_be16_to_cpu(&pr_buff->prin_descriptor.prin_readcap.length);
227 convert_be16_to_cpu(&pr_buff->prin_descriptor.prin_readcap.pr_type_mask);
232 static void mpath_format_readfullstatus(struct prin_resp *pr_buff)
235 uint32_t fdesc_count=0;
238 uint32_t additional_length, k, tid_len_len = 0;
239 char tempbuff[MPATH_MAX_PARAM_LEN];
240 struct prin_fulldescr fdesc;
241 static const unsigned int pbuf_size =
242 sizeof(pr_buff->prin_descriptor.prin_readfd.private_buffer);
244 convert_be32_to_cpu(&pr_buff->prin_descriptor.prin_readfd.prgeneration);
245 convert_be32_to_cpu(&pr_buff->prin_descriptor.prin_readfd.number_of_descriptor);
247 if (pr_buff->prin_descriptor.prin_readfd.number_of_descriptor == 0)
249 condlog(3, "No registration or reservation found.");
253 additional_length = pr_buff->prin_descriptor.prin_readfd.number_of_descriptor;
254 if (additional_length > pbuf_size) {
255 condlog(3, "PRIN length %u exceeds max length %d", additional_length,
260 memset(&fdesc, 0, sizeof(struct prin_fulldescr));
262 memcpy( tempbuff, pr_buff->prin_descriptor.prin_readfd.private_buffer,
264 memset(&pr_buff->prin_descriptor.prin_readfd.private_buffer, 0,
267 p =(unsigned char *)tempbuff;
268 ppbuff = (char *)pr_buff->prin_descriptor.prin_readfd.private_buffer;
270 for (k = 0; k < additional_length; k += num, p += num) {
271 memcpy(&fdesc.key, p, 8 );
273 fdesc.scope_type = p[13];
274 fdesc.rtpi = get_unaligned_be16(&p[18]);
276 tid_len_len = get_unaligned_be32(&p[20]);
277 if (tid_len_len + 24 + k > additional_length) {
279 "%s: corrupt PRIN response: status descriptor end %d exceeds length %d",
280 __func__, tid_len_len + k + 24,
282 tid_len_len = additional_length - k - 24;
286 decode_transport_id( &fdesc, &p[24], tid_len_len);
288 num = 24 + tid_len_len;
289 memcpy(ppbuff, &fdesc, sizeof(struct prin_fulldescr));
290 pr_buff->prin_descriptor.prin_readfd.descriptors[fdesc_count]= (struct prin_fulldescr *)ppbuff;
291 ppbuff += sizeof(struct prin_fulldescr);
295 pr_buff->prin_descriptor.prin_readfd.number_of_descriptor = fdesc_count;
301 decode_transport_id(struct prin_fulldescr *fdesc, unsigned char * p, int length)
305 for (k = 0, jump = 24; k < length; k += jump, p += jump) {
306 fdesc->trnptid.format_code = ((p[0] >> 6) & 0x3);
307 fdesc->trnptid.protocol_id = (p[0] & 0xf);
308 switch (fdesc->trnptid.protocol_id) {
309 case MPATH_PROTOCOL_ID_FC:
310 memcpy(&fdesc->trnptid.n_port_name, &p[8], 8);
313 case MPATH_PROTOCOL_ID_ISCSI:
314 num = get_unaligned_be16(&p[2]);
315 if (num >= sizeof(fdesc->trnptid.iscsi_name))
316 num = sizeof(fdesc->trnptid.iscsi_name);
317 memcpy(&fdesc->trnptid.iscsi_name, &p[4], num);
318 jump = (((num + 4) < 24) ? 24 : num + 4);
320 case MPATH_PROTOCOL_ID_SAS:
321 memcpy(&fdesc->trnptid.sas_address, &p[4], 8);
331 int prin_do_scsi_ioctl(char * dev, int rq_servact, struct prin_resp * resp, int noisy)
334 int ret, status, got, fd;
336 SenseData_t Sensedata;
337 int retry = MAXRETRY;
338 struct sg_io_hdr io_hdr;
339 char devname[FILE_NAME_SIZE];
340 unsigned char cdb[MPATH_PRIN_CMDLEN] =
341 {MPATH_PRIN_CMD, 0, 0, 0, 0, 0, 0, 0, 0, 0};
343 snprintf(devname, FILE_NAME_SIZE, "/dev/%s",dev);
344 fd = open(devname, O_RDONLY);
346 condlog(0, "%s: Unable to open device ", dev);
347 return MPATH_PR_FILE_ERROR;
350 if (mpath_mx_alloc_len)
351 mx_resp_len = mpath_mx_alloc_len;
353 mx_resp_len = get_prin_length(rq_servact);
355 if (mx_resp_len == 0) {
356 status = MPATH_PR_SYNTAX_ERROR;
360 cdb[1] = (unsigned char)(rq_servact & 0x1f);
361 cdb[7] = (unsigned char)((mx_resp_len >> 8) & 0xff);
362 cdb[8] = (unsigned char)(mx_resp_len & 0xff);
365 memset(&Sensedata, 0, sizeof(SenseData_t));
366 memset(&io_hdr,0 , sizeof( struct sg_io_hdr));
368 io_hdr.interface_id = 'S';
369 io_hdr.cmd_len = MPATH_PRIN_CMDLEN;
370 io_hdr.mx_sb_len = sizeof (SenseData_t);
371 io_hdr.dxfer_direction = SG_DXFER_FROM_DEV;
373 io_hdr.sbp = (void *)&Sensedata;
374 io_hdr.timeout = TIMEOUT;
378 io_hdr.dxfer_len = mx_resp_len;
379 io_hdr.dxferp = (void *)resp;
381 ret =ioctl(fd, SG_IO, &io_hdr);
383 condlog(0, "%s: IOCTL failed %d", dev, ret);
384 status = MPATH_PR_OTHER;
388 got = mx_resp_len - io_hdr.resid;
390 condlog(3, "%s: duration = %u (ms)", dev, io_hdr.duration);
391 condlog(4, "%s: persistent reservation in: requested %d bytes but got %d bytes)", dev, mx_resp_len, got);
393 status = mpath_translate_response(dev, io_hdr, &Sensedata);
395 if (status == MPATH_PR_SENSE_UNIT_ATTENTION && (retry > 0))
398 condlog(3, "%s: retrying for Unit Attention. Remaining retries = %d", dev, retry);
402 if (((status == MPATH_PR_SENSE_NOT_READY )&& (Sensedata.ASC == 0x04)&&
403 (Sensedata.ASCQ == 0x07))&& (retry > 0))
407 condlog(3, "%s: retrying for 02/04/07. Remaining retries = %d", dev, retry);
411 if (status != MPATH_PR_SUCCESS)
415 dumpHex((const char *)resp, got , 1);
420 case MPATH_PRIN_RKEY_SA :
421 mpath_format_readkeys(resp);
423 case MPATH_PRIN_RRES_SA :
424 mpath_format_readresv(resp);
426 case MPATH_PRIN_RCAP_SA :
427 mpath_format_reportcapabilities(resp);
429 case MPATH_PRIN_RFSTAT_SA :
430 mpath_format_readfullstatus(resp);
438 int mpath_translate_response (char * dev, struct sg_io_hdr io_hdr,
439 SenseData_t *Sensedata)
441 condlog(3, "%s: status driver:%02x host:%02x scsi:%02x", dev,
442 io_hdr.driver_status, io_hdr.host_status ,io_hdr.status);
443 io_hdr.status &= 0x7e;
444 if ((0 == io_hdr.status) &&
445 (0 == io_hdr.host_status) &&
446 (0 == io_hdr.driver_status))
447 return MPATH_PR_SUCCESS;
449 switch(io_hdr.status) {
452 case SAM_STAT_CHECK_CONDITION:
453 condlog(3, "%s: Sense_Key=%02x, ASC=%02x ASCQ=%02x",
454 dev, Sensedata->Sense_Key,
455 Sensedata->ASC, Sensedata->ASCQ);
456 switch(Sensedata->Sense_Key) {
458 return MPATH_PR_NO_SENSE;
459 case RECOVERED_ERROR:
460 return MPATH_PR_SUCCESS;
462 return MPATH_PR_SENSE_NOT_READY;
464 return MPATH_PR_SENSE_MEDIUM_ERROR;
466 return MPATH_PR_OTHER;
468 return MPATH_PR_SENSE_HARDWARE_ERROR;
469 case ILLEGAL_REQUEST:
470 return MPATH_PR_ILLEGAL_REQ;
472 return MPATH_PR_SENSE_UNIT_ATTENTION;
475 return MPATH_PR_OTHER;
476 case ABORTED_COMMAND:
477 return MPATH_PR_SENSE_ABORTED_COMMAND;
480 return MPATH_PR_OTHER;
482 case SAM_STAT_RESERVATION_CONFLICT:
483 return MPATH_PR_RESERV_CONFLICT;
486 return MPATH_PR_OTHER;
489 switch(io_hdr.host_status) {
493 return MPATH_PR_OTHER;
495 switch(io_hdr.driver_status)
500 return MPATH_PR_OTHER;
502 return MPATH_PR_SUCCESS;
505 void convert_be16_to_cpu(uint16_t *num)
507 *num = get_unaligned_be16(num);
510 void convert_be32_to_cpu(uint32_t *num)
512 *num = get_unaligned_be32(num);
516 dumpHex(const char* str, int len, int log)
518 const char * p = str;
521 const int bpstart = 5;
527 memset(buff, ' ', 80);
529 for (k = 0; k < len; k++) {
532 if (bpos == (bpstart + (9 * 3)))
534 sprintf(&buff[bpos], "%.2x", (int)(unsigned char)c);
535 buff[bpos + 2] = ' ';
536 if ((k > 0) && (0 == ((k + 1) % 16))) {
538 condlog(0, "%.76s" , buff);
540 printf("%.76s" , buff);
542 memset(buff, ' ', 80);
545 if (bpos > bpstart) {
546 buff[bpos + 2] = '\0';
548 condlog(0, "%s", buff);
550 printf("%s\n" , buff);
555 int get_prin_length(int rq_servact)
560 case MPATH_PRIN_RKEY_SA:
561 mx_resp_len = sizeof(struct prin_readdescr);
563 case MPATH_PRIN_RRES_SA :
564 mx_resp_len = sizeof(struct prin_resvdescr);
566 case MPATH_PRIN_RCAP_SA :
567 mx_resp_len = sizeof(struct prin_capdescr);
569 case MPATH_PRIN_RFSTAT_SA:
570 mx_resp_len = sizeof(struct print_fulldescr_list) + sizeof(struct prin_fulldescr *)*32;
573 condlog(0, "invalid service action, %d", rq_servact);
577 if (mx_resp_len > MPATH_MAX_PARAM_LEN)
578 mx_resp_len = MPATH_MAX_PARAM_LEN;