1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (C) 2001 Jens Axboe <axboe@suse.de>
5 #include <linux/compat.h>
6 #include <linux/kernel.h>
7 #include <linux/errno.h>
8 #include <linux/string.h>
9 #include <linux/module.h>
10 #include <linux/blkdev.h>
11 #include <linux/capability.h>
12 #include <linux/completion.h>
13 #include <linux/cdrom.h>
14 #include <linux/ratelimit.h>
15 #include <linux/slab.h>
16 #include <linux/times.h>
17 #include <linux/uio.h>
18 #include <linux/uaccess.h>
20 #include <scsi/scsi.h>
21 #include <scsi/scsi_ioctl.h>
22 #include <scsi/scsi_cmnd.h>
25 struct blk_cmd_filter {
26 unsigned long read_ok[BLK_SCSI_CMD_PER_LONG];
27 unsigned long write_ok[BLK_SCSI_CMD_PER_LONG];
30 static struct blk_cmd_filter blk_default_cmd_filter;
32 /* Command group 3 is reserved and should never be used. */
33 const unsigned char scsi_command_size_tbl[8] =
38 EXPORT_SYMBOL(scsi_command_size_tbl);
40 static int sg_get_version(int __user *p)
42 static const int sg_version_num = 30527;
43 return put_user(sg_version_num, p);
46 static int scsi_get_idlun(struct request_queue *q, int __user *p)
48 return put_user(0, p);
51 static int scsi_get_bus(struct request_queue *q, int __user *p)
53 return put_user(0, p);
56 static int sg_get_timeout(struct request_queue *q)
58 return jiffies_to_clock_t(q->sg_timeout);
61 static int sg_set_timeout(struct request_queue *q, int __user *p)
63 int timeout, err = get_user(timeout, p);
66 q->sg_timeout = clock_t_to_jiffies(timeout);
71 static int max_sectors_bytes(struct request_queue *q)
73 unsigned int max_sectors = queue_max_sectors(q);
75 max_sectors = min_t(unsigned int, max_sectors, INT_MAX >> 9);
77 return max_sectors << 9;
80 static int sg_get_reserved_size(struct request_queue *q, int __user *p)
82 int val = min_t(int, q->sg_reserved_size, max_sectors_bytes(q));
84 return put_user(val, p);
87 static int sg_set_reserved_size(struct request_queue *q, int __user *p)
89 int size, err = get_user(size, p);
97 q->sg_reserved_size = min(size, max_sectors_bytes(q));
102 * will always return that we are ATAPI even for a real SCSI drive, I'm not
103 * so sure this is worth doing anything about (why would you care??)
105 static int sg_emulated_host(struct request_queue *q, int __user *p)
107 return put_user(1, p);
110 static void blk_set_cmd_filter_defaults(struct blk_cmd_filter *filter)
112 /* Basic read-only commands */
113 __set_bit(TEST_UNIT_READY, filter->read_ok);
114 __set_bit(REQUEST_SENSE, filter->read_ok);
115 __set_bit(READ_6, filter->read_ok);
116 __set_bit(READ_10, filter->read_ok);
117 __set_bit(READ_12, filter->read_ok);
118 __set_bit(READ_16, filter->read_ok);
119 __set_bit(READ_BUFFER, filter->read_ok);
120 __set_bit(READ_DEFECT_DATA, filter->read_ok);
121 __set_bit(READ_CAPACITY, filter->read_ok);
122 __set_bit(READ_LONG, filter->read_ok);
123 __set_bit(INQUIRY, filter->read_ok);
124 __set_bit(MODE_SENSE, filter->read_ok);
125 __set_bit(MODE_SENSE_10, filter->read_ok);
126 __set_bit(LOG_SENSE, filter->read_ok);
127 __set_bit(START_STOP, filter->read_ok);
128 __set_bit(GPCMD_VERIFY_10, filter->read_ok);
129 __set_bit(VERIFY_16, filter->read_ok);
130 __set_bit(REPORT_LUNS, filter->read_ok);
131 __set_bit(SERVICE_ACTION_IN_16, filter->read_ok);
132 __set_bit(RECEIVE_DIAGNOSTIC, filter->read_ok);
133 __set_bit(MAINTENANCE_IN, filter->read_ok);
134 __set_bit(GPCMD_READ_BUFFER_CAPACITY, filter->read_ok);
136 /* Audio CD commands */
137 __set_bit(GPCMD_PLAY_CD, filter->read_ok);
138 __set_bit(GPCMD_PLAY_AUDIO_10, filter->read_ok);
139 __set_bit(GPCMD_PLAY_AUDIO_MSF, filter->read_ok);
140 __set_bit(GPCMD_PLAY_AUDIO_TI, filter->read_ok);
141 __set_bit(GPCMD_PAUSE_RESUME, filter->read_ok);
143 /* CD/DVD data reading */
144 __set_bit(GPCMD_READ_CD, filter->read_ok);
145 __set_bit(GPCMD_READ_CD_MSF, filter->read_ok);
146 __set_bit(GPCMD_READ_DISC_INFO, filter->read_ok);
147 __set_bit(GPCMD_READ_CDVD_CAPACITY, filter->read_ok);
148 __set_bit(GPCMD_READ_DVD_STRUCTURE, filter->read_ok);
149 __set_bit(GPCMD_READ_HEADER, filter->read_ok);
150 __set_bit(GPCMD_READ_TRACK_RZONE_INFO, filter->read_ok);
151 __set_bit(GPCMD_READ_SUBCHANNEL, filter->read_ok);
152 __set_bit(GPCMD_READ_TOC_PMA_ATIP, filter->read_ok);
153 __set_bit(GPCMD_REPORT_KEY, filter->read_ok);
154 __set_bit(GPCMD_SCAN, filter->read_ok);
155 __set_bit(GPCMD_GET_CONFIGURATION, filter->read_ok);
156 __set_bit(GPCMD_READ_FORMAT_CAPACITIES, filter->read_ok);
157 __set_bit(GPCMD_GET_EVENT_STATUS_NOTIFICATION, filter->read_ok);
158 __set_bit(GPCMD_GET_PERFORMANCE, filter->read_ok);
159 __set_bit(GPCMD_SEEK, filter->read_ok);
160 __set_bit(GPCMD_STOP_PLAY_SCAN, filter->read_ok);
162 /* Basic writing commands */
163 __set_bit(WRITE_6, filter->write_ok);
164 __set_bit(WRITE_10, filter->write_ok);
165 __set_bit(WRITE_VERIFY, filter->write_ok);
166 __set_bit(WRITE_12, filter->write_ok);
167 __set_bit(WRITE_VERIFY_12, filter->write_ok);
168 __set_bit(WRITE_16, filter->write_ok);
169 __set_bit(WRITE_LONG, filter->write_ok);
170 __set_bit(WRITE_LONG_2, filter->write_ok);
171 __set_bit(WRITE_SAME, filter->write_ok);
172 __set_bit(WRITE_SAME_16, filter->write_ok);
173 __set_bit(WRITE_SAME_32, filter->write_ok);
174 __set_bit(ERASE, filter->write_ok);
175 __set_bit(GPCMD_MODE_SELECT_10, filter->write_ok);
176 __set_bit(MODE_SELECT, filter->write_ok);
177 __set_bit(LOG_SELECT, filter->write_ok);
178 __set_bit(GPCMD_BLANK, filter->write_ok);
179 __set_bit(GPCMD_CLOSE_TRACK, filter->write_ok);
180 __set_bit(GPCMD_FLUSH_CACHE, filter->write_ok);
181 __set_bit(GPCMD_FORMAT_UNIT, filter->write_ok);
182 __set_bit(GPCMD_REPAIR_RZONE_TRACK, filter->write_ok);
183 __set_bit(GPCMD_RESERVE_RZONE_TRACK, filter->write_ok);
184 __set_bit(GPCMD_SEND_DVD_STRUCTURE, filter->write_ok);
185 __set_bit(GPCMD_SEND_EVENT, filter->write_ok);
186 __set_bit(GPCMD_SEND_KEY, filter->write_ok);
187 __set_bit(GPCMD_SEND_OPC, filter->write_ok);
188 __set_bit(GPCMD_SEND_CUE_SHEET, filter->write_ok);
189 __set_bit(GPCMD_SET_SPEED, filter->write_ok);
190 __set_bit(GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL, filter->write_ok);
191 __set_bit(GPCMD_LOAD_UNLOAD, filter->write_ok);
192 __set_bit(GPCMD_SET_STREAMING, filter->write_ok);
193 __set_bit(GPCMD_SET_READ_AHEAD, filter->write_ok);
196 __set_bit(ZBC_OUT, filter->write_ok);
197 __set_bit(ZBC_IN, filter->read_ok);
200 int blk_verify_command(unsigned char *cmd, fmode_t mode)
202 struct blk_cmd_filter *filter = &blk_default_cmd_filter;
204 /* root can do any command. */
205 if (capable(CAP_SYS_RAWIO))
208 /* Anybody who can open the device can do a read-safe command */
209 if (test_bit(cmd[0], filter->read_ok))
212 /* Write-safe commands require a writable open */
213 if (test_bit(cmd[0], filter->write_ok) && (mode & FMODE_WRITE))
218 EXPORT_SYMBOL(blk_verify_command);
220 static int blk_fill_sghdr_rq(struct request_queue *q, struct request *rq,
221 struct sg_io_hdr *hdr, fmode_t mode)
223 struct scsi_request *req = scsi_req(rq);
225 if (copy_from_user(req->cmd, hdr->cmdp, hdr->cmd_len))
227 if (blk_verify_command(req->cmd, mode))
231 * fill in request structure
233 req->cmd_len = hdr->cmd_len;
235 rq->timeout = msecs_to_jiffies(hdr->timeout);
237 rq->timeout = q->sg_timeout;
239 rq->timeout = BLK_DEFAULT_SG_TIMEOUT;
240 if (rq->timeout < BLK_MIN_SG_TIMEOUT)
241 rq->timeout = BLK_MIN_SG_TIMEOUT;
246 static int blk_complete_sghdr_rq(struct request *rq, struct sg_io_hdr *hdr,
249 struct scsi_request *req = scsi_req(rq);
253 * fill in all the output members
255 hdr->status = req->result & 0xff;
256 hdr->masked_status = status_byte(req->result);
257 hdr->msg_status = msg_byte(req->result);
258 hdr->host_status = host_byte(req->result);
259 hdr->driver_status = driver_byte(req->result);
261 if (hdr->masked_status || hdr->host_status || hdr->driver_status)
262 hdr->info |= SG_INFO_CHECK;
263 hdr->resid = req->resid_len;
266 if (req->sense_len && hdr->sbp) {
267 int len = min((unsigned int) hdr->mx_sb_len, req->sense_len);
269 if (!copy_to_user(hdr->sbp, req->sense, len))
270 hdr->sb_len_wr = len;
275 r = blk_rq_unmap_user(bio);
282 static int sg_io(struct request_queue *q, struct gendisk *bd_disk,
283 struct sg_io_hdr *hdr, fmode_t mode)
285 unsigned long start_time;
290 struct scsi_request *req;
293 if (hdr->interface_id != 'S')
296 if (hdr->dxfer_len > (queue_max_hw_sectors(q) << 9))
300 switch (hdr->dxfer_direction) {
303 case SG_DXFER_TO_DEV:
306 case SG_DXFER_TO_FROM_DEV:
307 case SG_DXFER_FROM_DEV:
310 if (hdr->flags & SG_FLAG_Q_AT_HEAD)
314 rq = blk_get_request(q, writing ? REQ_OP_SCSI_OUT : REQ_OP_SCSI_IN, 0);
319 if (hdr->cmd_len > BLK_MAX_CDB) {
320 req->cmd = kzalloc(hdr->cmd_len, GFP_KERNEL);
322 goto out_put_request;
325 ret = blk_fill_sghdr_rq(q, rq, hdr, mode);
330 if (hdr->iovec_count) {
332 struct iovec *iov = NULL;
334 ret = import_iovec(rq_data_dir(rq), hdr->dxferp,
335 hdr->iovec_count, 0, &iov, &i);
339 /* SG_IO howto says that the shorter of the two wins */
340 iov_iter_truncate(&i, hdr->dxfer_len);
342 ret = blk_rq_map_user_iov(q, rq, NULL, &i, GFP_KERNEL);
344 } else if (hdr->dxfer_len)
345 ret = blk_rq_map_user(q, rq, NULL, hdr->dxferp, hdr->dxfer_len,
354 start_time = jiffies;
356 /* ignore return value. All information is passed back to caller
357 * (if he doesn't check that is his problem).
358 * N.B. a non-zero SCSI status is _not_ necessarily an error.
360 blk_execute_rq(bd_disk, rq, at_head);
362 hdr->duration = jiffies_to_msecs(jiffies - start_time);
364 ret = blk_complete_sghdr_rq(rq, hdr, bio);
367 scsi_req_free_cmd(req);
374 * sg_scsi_ioctl -- handle deprecated SCSI_IOCTL_SEND_COMMAND ioctl
375 * @q: request queue to send scsi commands down
376 * @disk: gendisk to operate on (option)
377 * @mode: mode used to open the file through which the ioctl has been
379 * @sic: userspace structure describing the command to perform
381 * Send down the scsi command described by @sic to the device below
382 * the request queue @q. If @file is non-NULL it's used to perform
383 * fine-grained permission checks that allow users to send down
384 * non-destructive SCSI commands. If the caller has a struct gendisk
385 * available it should be passed in as @disk to allow the low level
386 * driver to use the information contained in it. A non-NULL @disk
387 * is only allowed if the caller knows that the low level driver doesn't
388 * need it (e.g. in the scsi subsystem).
391 * - This interface is deprecated - users should use the SG_IO
392 * interface instead, as this is a more flexible approach to
393 * performing SCSI commands on a device.
394 * - The SCSI command length is determined by examining the 1st byte
395 * of the given command. There is no way to override this.
396 * - Data transfers are limited to PAGE_SIZE
397 * - The length (x + y) must be at least OMAX_SB_LEN bytes long to
398 * accommodate the sense buffer when an error occurs.
399 * The sense buffer is truncated to OMAX_SB_LEN (16) bytes so that
400 * old code will not be surprised.
401 * - If a Unix error occurs (e.g. ENOMEM) then the user will receive
402 * a negative return and the Unix error code in 'errno'.
403 * If the SCSI command succeeds then 0 is returned.
404 * Positive numbers returned are the compacted SCSI error codes (4
405 * bytes in one int) where the lowest byte is the SCSI status.
407 int sg_scsi_ioctl(struct request_queue *q, struct gendisk *disk, fmode_t mode,
408 struct scsi_ioctl_command __user *sic)
410 enum { OMAX_SB_LEN = 16 }; /* For backward compatibility */
412 struct scsi_request *req;
414 unsigned int in_len, out_len, bytes, opcode, cmdlen;
421 * get in an out lengths, verify they don't exceed a page worth of data
423 if (get_user(in_len, &sic->inlen))
425 if (get_user(out_len, &sic->outlen))
427 if (in_len > PAGE_SIZE || out_len > PAGE_SIZE)
429 if (get_user(opcode, sic->data))
432 bytes = max(in_len, out_len);
434 buffer = kzalloc(bytes, q->bounce_gfp | GFP_USER| __GFP_NOWARN);
440 rq = blk_get_request(q, in_len ? REQ_OP_SCSI_OUT : REQ_OP_SCSI_IN, 0);
443 goto error_free_buffer;
447 cmdlen = COMMAND_SIZE(opcode);
450 * get command and data to send to device, if any
453 req->cmd_len = cmdlen;
454 if (copy_from_user(req->cmd, sic->data, cmdlen))
457 if (in_len && copy_from_user(buffer, sic->data + cmdlen, in_len))
460 err = blk_verify_command(req->cmd, mode);
464 /* default. possible overriden later */
468 case SEND_DIAGNOSTIC:
470 rq->timeout = FORMAT_UNIT_TIMEOUT;
474 rq->timeout = START_STOP_TIMEOUT;
477 rq->timeout = MOVE_MEDIUM_TIMEOUT;
479 case READ_ELEMENT_STATUS:
480 rq->timeout = READ_ELEMENT_STATUS_TIMEOUT;
482 case READ_DEFECT_DATA:
483 rq->timeout = READ_DEFECT_DATA_TIMEOUT;
487 rq->timeout = BLK_DEFAULT_SG_TIMEOUT;
491 if (bytes && blk_rq_map_kern(q, rq, buffer, bytes, GFP_NOIO)) {
492 err = DRIVER_ERROR << 24;
496 blk_execute_rq(disk, rq, 0);
498 err = req->result & 0xff; /* only 8 bit SCSI status */
500 if (req->sense_len && req->sense) {
501 bytes = (OMAX_SB_LEN > req->sense_len) ?
502 req->sense_len : OMAX_SB_LEN;
503 if (copy_to_user(sic->data, req->sense, bytes))
507 if (copy_to_user(sic->data, buffer, out_len))
519 EXPORT_SYMBOL_GPL(sg_scsi_ioctl);
521 /* Send basic block requests */
522 static int __blk_send_generic(struct request_queue *q, struct gendisk *bd_disk,
528 rq = blk_get_request(q, REQ_OP_SCSI_OUT, 0);
531 rq->timeout = BLK_DEFAULT_SG_TIMEOUT;
532 scsi_req(rq)->cmd[0] = cmd;
533 scsi_req(rq)->cmd[4] = data;
534 scsi_req(rq)->cmd_len = 6;
535 blk_execute_rq(bd_disk, rq, 0);
536 err = scsi_req(rq)->result ? -EIO : 0;
542 static inline int blk_send_start_stop(struct request_queue *q,
543 struct gendisk *bd_disk, int data)
545 return __blk_send_generic(q, bd_disk, GPCMD_START_STOP_UNIT, data);
548 int put_sg_io_hdr(const struct sg_io_hdr *hdr, void __user *argp)
551 if (in_compat_syscall()) {
552 struct compat_sg_io_hdr hdr32 = {
553 .interface_id = hdr->interface_id,
554 .dxfer_direction = hdr->dxfer_direction,
555 .cmd_len = hdr->cmd_len,
556 .mx_sb_len = hdr->mx_sb_len,
557 .iovec_count = hdr->iovec_count,
558 .dxfer_len = hdr->dxfer_len,
559 .dxferp = (uintptr_t)hdr->dxferp,
560 .cmdp = (uintptr_t)hdr->cmdp,
561 .sbp = (uintptr_t)hdr->sbp,
562 .timeout = hdr->timeout,
564 .pack_id = hdr->pack_id,
565 .usr_ptr = (uintptr_t)hdr->usr_ptr,
566 .status = hdr->status,
567 .masked_status = hdr->masked_status,
568 .msg_status = hdr->msg_status,
569 .sb_len_wr = hdr->sb_len_wr,
570 .host_status = hdr->host_status,
571 .driver_status = hdr->driver_status,
573 .duration = hdr->duration,
577 if (copy_to_user(argp, &hdr32, sizeof(hdr32)))
584 if (copy_to_user(argp, hdr, sizeof(*hdr)))
589 EXPORT_SYMBOL(put_sg_io_hdr);
591 int get_sg_io_hdr(struct sg_io_hdr *hdr, const void __user *argp)
594 struct compat_sg_io_hdr hdr32;
596 if (in_compat_syscall()) {
597 if (copy_from_user(&hdr32, argp, sizeof(hdr32)))
600 *hdr = (struct sg_io_hdr) {
601 .interface_id = hdr32.interface_id,
602 .dxfer_direction = hdr32.dxfer_direction,
603 .cmd_len = hdr32.cmd_len,
604 .mx_sb_len = hdr32.mx_sb_len,
605 .iovec_count = hdr32.iovec_count,
606 .dxfer_len = hdr32.dxfer_len,
607 .dxferp = compat_ptr(hdr32.dxferp),
608 .cmdp = compat_ptr(hdr32.cmdp),
609 .sbp = compat_ptr(hdr32.sbp),
610 .timeout = hdr32.timeout,
611 .flags = hdr32.flags,
612 .pack_id = hdr32.pack_id,
613 .usr_ptr = compat_ptr(hdr32.usr_ptr),
614 .status = hdr32.status,
615 .masked_status = hdr32.masked_status,
616 .msg_status = hdr32.msg_status,
617 .sb_len_wr = hdr32.sb_len_wr,
618 .host_status = hdr32.host_status,
619 .driver_status = hdr32.driver_status,
620 .resid = hdr32.resid,
621 .duration = hdr32.duration,
629 if (copy_from_user(hdr, argp, sizeof(*hdr)))
634 EXPORT_SYMBOL(get_sg_io_hdr);
637 struct compat_cdrom_generic_command {
638 unsigned char cmd[CDROM_PACKET_SIZE];
639 compat_caddr_t buffer;
640 compat_uint_t buflen;
642 compat_caddr_t sense;
643 unsigned char data_direction;
644 unsigned char pad[3];
646 compat_int_t timeout;
647 compat_caddr_t unused;
651 static int scsi_get_cdrom_generic_arg(struct cdrom_generic_command *cgc,
652 const void __user *arg)
655 if (in_compat_syscall()) {
656 struct compat_cdrom_generic_command cgc32;
658 if (copy_from_user(&cgc32, arg, sizeof(cgc32)))
661 *cgc = (struct cdrom_generic_command) {
662 .buffer = compat_ptr(cgc32.buffer),
663 .buflen = cgc32.buflen,
665 .sense = compat_ptr(cgc32.sense),
666 .data_direction = cgc32.data_direction,
667 .quiet = cgc32.quiet,
668 .timeout = cgc32.timeout,
669 .unused = compat_ptr(cgc32.unused),
671 memcpy(&cgc->cmd, &cgc32.cmd, CDROM_PACKET_SIZE);
675 if (copy_from_user(cgc, arg, sizeof(*cgc)))
681 static int scsi_put_cdrom_generic_arg(const struct cdrom_generic_command *cgc,
685 if (in_compat_syscall()) {
686 struct compat_cdrom_generic_command cgc32 = {
687 .buffer = (uintptr_t)(cgc->buffer),
688 .buflen = cgc->buflen,
690 .sense = (uintptr_t)(cgc->sense),
691 .data_direction = cgc->data_direction,
693 .timeout = cgc->timeout,
694 .unused = (uintptr_t)(cgc->unused),
696 memcpy(&cgc32.cmd, &cgc->cmd, CDROM_PACKET_SIZE);
698 if (copy_to_user(arg, &cgc32, sizeof(cgc32)))
704 if (copy_to_user(arg, cgc, sizeof(*cgc)))
710 static int scsi_cdrom_send_packet(struct request_queue *q,
711 struct gendisk *bd_disk,
712 fmode_t mode, void __user *arg)
714 struct cdrom_generic_command cgc;
715 struct sg_io_hdr hdr;
718 err = scsi_get_cdrom_generic_arg(&cgc, arg);
722 cgc.timeout = clock_t_to_jiffies(cgc.timeout);
723 memset(&hdr, 0, sizeof(hdr));
724 hdr.interface_id = 'S';
725 hdr.cmd_len = sizeof(cgc.cmd);
726 hdr.dxfer_len = cgc.buflen;
727 switch (cgc.data_direction) {
728 case CGC_DATA_UNKNOWN:
729 hdr.dxfer_direction = SG_DXFER_UNKNOWN;
732 hdr.dxfer_direction = SG_DXFER_TO_DEV;
735 hdr.dxfer_direction = SG_DXFER_FROM_DEV;
738 hdr.dxfer_direction = SG_DXFER_NONE;
744 hdr.dxferp = cgc.buffer;
747 hdr.mx_sb_len = sizeof(struct request_sense);
748 hdr.timeout = jiffies_to_msecs(cgc.timeout);
749 hdr.cmdp = ((struct cdrom_generic_command __user*) arg)->cmd;
750 hdr.cmd_len = sizeof(cgc.cmd);
752 err = sg_io(q, bd_disk, &hdr, mode);
760 cgc.buflen = hdr.resid;
761 if (scsi_put_cdrom_generic_arg(&cgc, arg))
767 int scsi_cmd_ioctl(struct request_queue *q, struct gendisk *bd_disk, fmode_t mode,
768 unsigned int cmd, void __user *arg)
779 case SG_GET_VERSION_NUM:
780 err = sg_get_version(arg);
782 case SCSI_IOCTL_GET_IDLUN:
783 err = scsi_get_idlun(q, arg);
785 case SCSI_IOCTL_GET_BUS_NUMBER:
786 err = scsi_get_bus(q, arg);
789 err = sg_set_timeout(q, arg);
792 err = sg_get_timeout(q);
794 case SG_GET_RESERVED_SIZE:
795 err = sg_get_reserved_size(q, arg);
797 case SG_SET_RESERVED_SIZE:
798 err = sg_set_reserved_size(q, arg);
800 case SG_EMULATED_HOST:
801 err = sg_emulated_host(q, arg);
804 struct sg_io_hdr hdr;
806 err = get_sg_io_hdr(&hdr, arg);
809 err = sg_io(q, bd_disk, &hdr, mode);
813 if (put_sg_io_hdr(&hdr, arg))
817 case CDROM_SEND_PACKET:
818 err = scsi_cdrom_send_packet(q, bd_disk, mode, arg);
822 * old junk scsi send command ioctl
824 case SCSI_IOCTL_SEND_COMMAND:
825 printk(KERN_WARNING "program %s is using a deprecated SCSI ioctl, please convert it to SG_IO\n", current->comm);
830 err = sg_scsi_ioctl(q, bd_disk, mode, arg);
833 err = blk_send_start_stop(q, bd_disk, 0x03);
836 err = blk_send_start_stop(q, bd_disk, 0x02);
844 EXPORT_SYMBOL(scsi_cmd_ioctl);
846 int scsi_verify_blk_ioctl(struct block_device *bd, unsigned int cmd)
848 if (bd && !bdev_is_partition(bd))
851 if (capable(CAP_SYS_RAWIO))
856 EXPORT_SYMBOL(scsi_verify_blk_ioctl);
858 int scsi_cmd_blk_ioctl(struct block_device *bd, fmode_t mode,
859 unsigned int cmd, void __user *arg)
863 ret = scsi_verify_blk_ioctl(bd, cmd);
867 return scsi_cmd_ioctl(bd->bd_disk->queue, bd->bd_disk, mode, cmd, arg);
869 EXPORT_SYMBOL(scsi_cmd_blk_ioctl);
872 * scsi_req_init - initialize certain fields of a scsi_request structure
873 * @req: Pointer to a scsi_request structure.
874 * Initializes .__cmd[], .cmd, .cmd_len and .sense_len but no other members
875 * of struct scsi_request.
877 void scsi_req_init(struct scsi_request *req)
879 memset(req->__cmd, 0, sizeof(req->__cmd));
880 req->cmd = req->__cmd;
881 req->cmd_len = BLK_MAX_CDB;
884 EXPORT_SYMBOL(scsi_req_init);
886 static int __init blk_scsi_ioctl_init(void)
888 blk_set_cmd_filter_defaults(&blk_default_cmd_filter);
891 fs_initcall(blk_scsi_ioctl_init);