scsi: scsi_ioctl: Move the "block layer" SCSI ioctl handling to drivers/scsi (f2542a3b) · Commits · EulixOS / Software / Kernel

block/Makefile

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Original line number	Diff line number	Diff line
		@@ -12,7 +12,6 @@ obj-$(CONFIG_BLOCK) := bio.o elevator.o blk-core.o blk-sysfs.o \
		disk-events.o

		obj-$(CONFIG_BOUNCE) += bounce.o
		obj-$(CONFIG_BLK_SCSI_REQUEST) += scsi_ioctl.o
		obj-$(CONFIG_BLK_DEV_BSG_COMMON) += bsg.o
		obj-$(CONFIG_BLK_DEV_BSGLIB) += bsg-lib.o
		obj-$(CONFIG_BLK_CGROUP) += blk-cgroup.o

block/scsi_ioctl.c

deleted100644 → 0

+0 −796

Original line number	Diff line number	Diff line
		// SPDX-License-Identifier: GPL-2.0
		/*
		* Copyright (C) 2001 Jens Axboe <axboe@suse.de>
		*/
		#include <linux/compat.h>
		#include <linux/kernel.h>
		#include <linux/errno.h>
		#include <linux/string.h>
		#include <linux/module.h>
		#include <linux/blkdev.h>
		#include <linux/capability.h>
		#include <linux/completion.h>
		#include <linux/cdrom.h>
		#include <linux/ratelimit.h>
		#include <linux/slab.h>
		#include <linux/times.h>
		#include <linux/uio.h>
		#include <linux/uaccess.h>

		#include <scsi/scsi.h>
		#include <scsi/scsi_ioctl.h>
		#include <scsi/scsi_cmnd.h>
		#include <scsi/sg.h>

		static int sg_get_version(int __user *p)
		{
		static const int sg_version_num = 30527;
		return put_user(sg_version_num, p);
		}

		static int sg_get_timeout(struct request_queue *q)
		{
		return jiffies_to_clock_t(q->sg_timeout);
		}

		static int sg_set_timeout(struct request_queue q, int __user p)
		{
		int timeout, err = get_user(timeout, p);

		if (!err)
		q->sg_timeout = clock_t_to_jiffies(timeout);

		return err;
		}

		static int sg_get_reserved_size(struct request_queue q, int __user p)
		{
		int val = min(q->sg_reserved_size, queue_max_bytes(q));

		return put_user(val, p);
		}

		static int sg_set_reserved_size(struct request_queue q, int __user p)
		{
		int size, err = get_user(size, p);

		if (err)
		return err;

		if (size < 0)
		return -EINVAL;

		q->sg_reserved_size = min_t(unsigned int, size, queue_max_bytes(q));
		return 0;
		}

		/*
		* will always return that we are ATAPI even for a real SCSI drive, I'm not
		* so sure this is worth doing anything about (why would you care??)
		*/
		static int sg_emulated_host(struct request_queue q, int __user p)
		{
		return put_user(1, p);
		}

		/*
		* Check if the given command is allowed.
		*
		* For unprivileged users only a small set of whitelisted command is allowed so
		* that they can't format the drive or update the firmware.
		*/
		bool scsi_cmd_allowed(unsigned char *cmd, fmode_t mode)
		{
		/* root can do any command. */
		if (capable(CAP_SYS_RAWIO))
		return true;

		/* Anybody who can open the device can do a read-safe command */
		switch (cmd[0]) {
		/* Basic read-only commands */
		case TEST_UNIT_READY:
		case REQUEST_SENSE:
		case READ_6:
		case READ_10:
		case READ_12:
		case READ_16:
		case READ_BUFFER:
		case READ_DEFECT_DATA:
		case READ_CAPACITY: /* also GPCMD_READ_CDVD_CAPACITY */
		case READ_LONG:
		case INQUIRY:
		case MODE_SENSE:
		case MODE_SENSE_10:
		case LOG_SENSE:
		case START_STOP:
		case GPCMD_VERIFY_10:
		case VERIFY_16:
		case REPORT_LUNS:
		case SERVICE_ACTION_IN_16:
		case RECEIVE_DIAGNOSTIC:
		case MAINTENANCE_IN: /* also GPCMD_SEND_KEY, which is a write command */
		case GPCMD_READ_BUFFER_CAPACITY:
		/* Audio CD commands */
		case GPCMD_PLAY_CD:
		case GPCMD_PLAY_AUDIO_10:
		case GPCMD_PLAY_AUDIO_MSF:
		case GPCMD_PLAY_AUDIO_TI:
		case GPCMD_PAUSE_RESUME:
		/* CD/DVD data reading */
		case GPCMD_READ_CD:
		case GPCMD_READ_CD_MSF:
		case GPCMD_READ_DISC_INFO:
		case GPCMD_READ_DVD_STRUCTURE:
		case GPCMD_READ_HEADER:
		case GPCMD_READ_TRACK_RZONE_INFO:
		case GPCMD_READ_SUBCHANNEL:
		case GPCMD_READ_TOC_PMA_ATIP:
		case GPCMD_REPORT_KEY:
		case GPCMD_SCAN:
		case GPCMD_GET_CONFIGURATION:
		case GPCMD_READ_FORMAT_CAPACITIES:
		case GPCMD_GET_EVENT_STATUS_NOTIFICATION:
		case GPCMD_GET_PERFORMANCE:
		case GPCMD_SEEK:
		case GPCMD_STOP_PLAY_SCAN:
		/* ZBC */
		case ZBC_IN:
		return true;
		/* Basic writing commands */
		case WRITE_6:
		case WRITE_10:
		case WRITE_VERIFY:
		case WRITE_12:
		case WRITE_VERIFY_12:
		case WRITE_16:
		case WRITE_LONG:
		case WRITE_LONG_2:
		case WRITE_SAME:
		case WRITE_SAME_16:
		case WRITE_SAME_32:
		case ERASE:
		case GPCMD_MODE_SELECT_10:
		case MODE_SELECT:
		case LOG_SELECT:
		case GPCMD_BLANK:
		case GPCMD_CLOSE_TRACK:
		case GPCMD_FLUSH_CACHE:
		case GPCMD_FORMAT_UNIT:
		case GPCMD_REPAIR_RZONE_TRACK:
		case GPCMD_RESERVE_RZONE_TRACK:
		case GPCMD_SEND_DVD_STRUCTURE:
		case GPCMD_SEND_EVENT:
		case GPCMD_SEND_OPC:
		case GPCMD_SEND_CUE_SHEET:
		case GPCMD_SET_SPEED:
		case GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL:
		case GPCMD_LOAD_UNLOAD:
		case GPCMD_SET_STREAMING:
		case GPCMD_SET_READ_AHEAD:
		/* ZBC */
		case ZBC_OUT:
		return (mode & FMODE_WRITE);
		default:
		return false;
		}
		}
		EXPORT_SYMBOL(scsi_cmd_allowed);

		static int blk_fill_sghdr_rq(struct request_queue q, struct request rq,
		struct sg_io_hdr *hdr, fmode_t mode)
		{
		struct scsi_request *req = scsi_req(rq);

		if (copy_from_user(req->cmd, hdr->cmdp, hdr->cmd_len))
		return -EFAULT;
		if (!scsi_cmd_allowed(req->cmd, mode))
		return -EPERM;

		/*
		* fill in request structure
		*/
		req->cmd_len = hdr->cmd_len;

		rq->timeout = msecs_to_jiffies(hdr->timeout);
		if (!rq->timeout)
		rq->timeout = q->sg_timeout;
		if (!rq->timeout)
		rq->timeout = BLK_DEFAULT_SG_TIMEOUT;
		if (rq->timeout < BLK_MIN_SG_TIMEOUT)
		rq->timeout = BLK_MIN_SG_TIMEOUT;

		return 0;
		}

		static int blk_complete_sghdr_rq(struct request rq, struct sg_io_hdr hdr,
		struct bio *bio)
		{
		struct scsi_request *req = scsi_req(rq);
		int r, ret = 0;

		/*
		* fill in all the output members
		*/
		hdr->status = req->result & 0xff;
		hdr->masked_status = status_byte(req->result);
		hdr->msg_status = COMMAND_COMPLETE;
		hdr->host_status = host_byte(req->result);
		hdr->driver_status = 0;
		if (scsi_status_is_check_condition(hdr->status))
		hdr->driver_status = DRIVER_SENSE;
		hdr->info = 0;
		if (hdr->masked_status \|\| hdr->host_status \|\| hdr->driver_status)
		hdr->info \|= SG_INFO_CHECK;
		hdr->resid = req->resid_len;
		hdr->sb_len_wr = 0;

		if (req->sense_len && hdr->sbp) {
		int len = min((unsigned int) hdr->mx_sb_len, req->sense_len);

		if (!copy_to_user(hdr->sbp, req->sense, len))
		hdr->sb_len_wr = len;
		else
		ret = -EFAULT;
		}

		r = blk_rq_unmap_user(bio);
		if (!ret)
		ret = r;

		return ret;
		}

		static int sg_io(struct request_queue q, struct gendisk bd_disk,
		struct sg_io_hdr *hdr, fmode_t mode)
		{
		unsigned long start_time;
		ssize_t ret = 0;
		int writing = 0;
		int at_head = 0;
		struct request *rq;
		struct scsi_request *req;
		struct bio *bio;

		if (hdr->interface_id != 'S')
		return -EINVAL;

		if (hdr->dxfer_len > (queue_max_hw_sectors(q) << 9))
		return -EIO;

		if (hdr->dxfer_len)
		switch (hdr->dxfer_direction) {
		default:
		return -EINVAL;
		case SG_DXFER_TO_DEV:
		writing = 1;
		break;
		case SG_DXFER_TO_FROM_DEV:
		case SG_DXFER_FROM_DEV:
		break;
		}
		if (hdr->flags & SG_FLAG_Q_AT_HEAD)
		at_head = 1;

		ret = -ENOMEM;
		rq = blk_get_request(q, writing ? REQ_OP_DRV_OUT : REQ_OP_DRV_IN, 0);
		if (IS_ERR(rq))
		return PTR_ERR(rq);
		req = scsi_req(rq);

		if (hdr->cmd_len > BLK_MAX_CDB) {
		req->cmd = kzalloc(hdr->cmd_len, GFP_KERNEL);
		if (!req->cmd)
		goto out_put_request;
		}

		ret = blk_fill_sghdr_rq(q, rq, hdr, mode);
		if (ret < 0)
		goto out_free_cdb;

		ret = 0;
		if (hdr->iovec_count) {
		struct iov_iter i;
		struct iovec *iov = NULL;

		ret = import_iovec(rq_data_dir(rq), hdr->dxferp,
		hdr->iovec_count, 0, &iov, &i);
		if (ret < 0)
		goto out_free_cdb;

		/* SG_IO howto says that the shorter of the two wins */
		iov_iter_truncate(&i, hdr->dxfer_len);

		ret = blk_rq_map_user_iov(q, rq, NULL, &i, GFP_KERNEL);
		kfree(iov);
		} else if (hdr->dxfer_len)
		ret = blk_rq_map_user(q, rq, NULL, hdr->dxferp, hdr->dxfer_len,
		GFP_KERNEL);

		if (ret)
		goto out_free_cdb;

		bio = rq->bio;
		req->retries = 0;

		start_time = jiffies;

		blk_execute_rq(bd_disk, rq, at_head);

		hdr->duration = jiffies_to_msecs(jiffies - start_time);

		ret = blk_complete_sghdr_rq(rq, hdr, bio);

		out_free_cdb:
		scsi_req_free_cmd(req);
		out_put_request:
		blk_put_request(rq);
		return ret;
		}

		/**
		* sg_scsi_ioctl -- handle deprecated SCSI_IOCTL_SEND_COMMAND ioctl
		* @q: request queue to send scsi commands down
		* @disk: gendisk to operate on (option)
		* @mode: mode used to open the file through which the ioctl has been
		* submitted
		* @sic: userspace structure describing the command to perform
		*
		* Send down the scsi command described by @sic to the device below
		* the request queue @q. If @file is non-NULL it's used to perform
		* fine-grained permission checks that allow users to send down
		* non-destructive SCSI commands. If the caller has a struct gendisk
		* available it should be passed in as @disk to allow the low level
		* driver to use the information contained in it. A non-NULL @disk
		* is only allowed if the caller knows that the low level driver doesn't
		* need it (e.g. in the scsi subsystem).
		*
		* Notes:
		* - This interface is deprecated - users should use the SG_IO
		* interface instead, as this is a more flexible approach to
		* performing SCSI commands on a device.
		* - The SCSI command length is determined by examining the 1st byte
		* of the given command. There is no way to override this.
		* - Data transfers are limited to PAGE_SIZE
		* - The length (x + y) must be at least OMAX_SB_LEN bytes long to
		* accommodate the sense buffer when an error occurs.
		* The sense buffer is truncated to OMAX_SB_LEN (16) bytes so that
		* old code will not be surprised.
		* - If a Unix error occurs (e.g. ENOMEM) then the user will receive
		* a negative return and the Unix error code in 'errno'.
		* If the SCSI command succeeds then 0 is returned.
		* Positive numbers returned are the compacted SCSI error codes (4
		* bytes in one int) where the lowest byte is the SCSI status.
		*/
		int sg_scsi_ioctl(struct request_queue q, struct gendisk disk, fmode_t mode,
		struct scsi_ioctl_command __user *sic)
		{
		enum { OMAX_SB_LEN = 16 }; /* For backward compatibility */
		struct request *rq;
		struct scsi_request *req;
		int err;
		unsigned int in_len, out_len, bytes, opcode, cmdlen;
		char *buffer = NULL;

		if (!sic)
		return -EINVAL;

		/*
		* get in an out lengths, verify they don't exceed a page worth of data
		*/
		if (get_user(in_len, &sic->inlen))
		return -EFAULT;
		if (get_user(out_len, &sic->outlen))
		return -EFAULT;
		if (in_len > PAGE_SIZE \|\| out_len > PAGE_SIZE)
		return -EINVAL;
		if (get_user(opcode, sic->data))
		return -EFAULT;

		bytes = max(in_len, out_len);
		if (bytes) {
		buffer = kzalloc(bytes, GFP_NOIO \| GFP_USER \| __GFP_NOWARN);
		if (!buffer)
		return -ENOMEM;

		}

		rq = blk_get_request(q, in_len ? REQ_OP_DRV_OUT : REQ_OP_DRV_IN, 0);
		if (IS_ERR(rq)) {
		err = PTR_ERR(rq);
		goto error_free_buffer;
		}
		req = scsi_req(rq);

		cmdlen = COMMAND_SIZE(opcode);

		/*
		* get command and data to send to device, if any
		*/
		err = -EFAULT;
		req->cmd_len = cmdlen;
		if (copy_from_user(req->cmd, sic->data, cmdlen))
		goto error;

		if (in_len && copy_from_user(buffer, sic->data + cmdlen, in_len))
		goto error;

		err = -EPERM;
		if (!scsi_cmd_allowed(req->cmd, mode))
		goto error;

		/* default. possible overriden later */
		req->retries = 5;

		switch (opcode) {
		case SEND_DIAGNOSTIC:
		case FORMAT_UNIT:
		rq->timeout = FORMAT_UNIT_TIMEOUT;
		req->retries = 1;
		break;
		case START_STOP:
		rq->timeout = START_STOP_TIMEOUT;
		break;
		case MOVE_MEDIUM:
		rq->timeout = MOVE_MEDIUM_TIMEOUT;
		break;
		case READ_ELEMENT_STATUS:
		rq->timeout = READ_ELEMENT_STATUS_TIMEOUT;
		break;
		case READ_DEFECT_DATA:
		rq->timeout = READ_DEFECT_DATA_TIMEOUT;
		req->retries = 1;
		break;
		default:
		rq->timeout = BLK_DEFAULT_SG_TIMEOUT;
		break;
		}

		if (bytes) {
		err = blk_rq_map_kern(q, rq, buffer, bytes, GFP_NOIO);
		if (err)
		goto error;
		}

		blk_execute_rq(disk, rq, 0);

		err = req->result & 0xff; /* only 8 bit SCSI status */
		if (err) {
		if (req->sense_len && req->sense) {
		bytes = (OMAX_SB_LEN > req->sense_len) ?
		req->sense_len : OMAX_SB_LEN;
		if (copy_to_user(sic->data, req->sense, bytes))
		err = -EFAULT;
		}
		} else {
		if (copy_to_user(sic->data, buffer, out_len))
		err = -EFAULT;
		}

		error:
		blk_put_request(rq);

		error_free_buffer:
		kfree(buffer);

		return err;
		}
		EXPORT_SYMBOL_GPL(sg_scsi_ioctl);

		/* Send basic block requests */
		static int __blk_send_generic(struct request_queue q, struct gendisk bd_disk,
		int cmd, int data)
		{
		struct request *rq;
		int err;

		rq = blk_get_request(q, REQ_OP_DRV_OUT, 0);
		if (IS_ERR(rq))
		return PTR_ERR(rq);
		rq->timeout = BLK_DEFAULT_SG_TIMEOUT;
		scsi_req(rq)->cmd[0] = cmd;
		scsi_req(rq)->cmd[4] = data;
		scsi_req(rq)->cmd_len = 6;
		blk_execute_rq(bd_disk, rq, 0);
		err = scsi_req(rq)->result ? -EIO : 0;
		blk_put_request(rq);

		return err;
		}

		static inline int blk_send_start_stop(struct request_queue *q,
		struct gendisk *bd_disk, int data)
		{
		return __blk_send_generic(q, bd_disk, GPCMD_START_STOP_UNIT, data);
		}

		int put_sg_io_hdr(const struct sg_io_hdr hdr, void __user argp)
		{
		#ifdef CONFIG_COMPAT
		if (in_compat_syscall()) {
		struct compat_sg_io_hdr hdr32 = {
		.interface_id = hdr->interface_id,
		.dxfer_direction = hdr->dxfer_direction,
		.cmd_len = hdr->cmd_len,
		.mx_sb_len = hdr->mx_sb_len,
		.iovec_count = hdr->iovec_count,
		.dxfer_len = hdr->dxfer_len,
		.dxferp = (uintptr_t)hdr->dxferp,
		.cmdp = (uintptr_t)hdr->cmdp,
		.sbp = (uintptr_t)hdr->sbp,
		.timeout = hdr->timeout,
		.flags = hdr->flags,
		.pack_id = hdr->pack_id,
		.usr_ptr = (uintptr_t)hdr->usr_ptr,
		.status = hdr->status,
		.masked_status = hdr->masked_status,
		.msg_status = hdr->msg_status,
		.sb_len_wr = hdr->sb_len_wr,
		.host_status = hdr->host_status,
		.driver_status = hdr->driver_status,
		.resid = hdr->resid,
		.duration = hdr->duration,
		.info = hdr->info,
		};

		if (copy_to_user(argp, &hdr32, sizeof(hdr32)))
		return -EFAULT;

		return 0;
		}
		#endif

		if (copy_to_user(argp, hdr, sizeof(*hdr)))
		return -EFAULT;

		return 0;
		}
		EXPORT_SYMBOL(put_sg_io_hdr);

		int get_sg_io_hdr(struct sg_io_hdr hdr, const void __user argp)
		{
		#ifdef CONFIG_COMPAT
		struct compat_sg_io_hdr hdr32;

		if (in_compat_syscall()) {
		if (copy_from_user(&hdr32, argp, sizeof(hdr32)))
		return -EFAULT;

		*hdr = (struct sg_io_hdr) {
		.interface_id = hdr32.interface_id,
		.dxfer_direction = hdr32.dxfer_direction,
		.cmd_len = hdr32.cmd_len,
		.mx_sb_len = hdr32.mx_sb_len,
		.iovec_count = hdr32.iovec_count,
		.dxfer_len = hdr32.dxfer_len,
		.dxferp = compat_ptr(hdr32.dxferp),
		.cmdp = compat_ptr(hdr32.cmdp),
		.sbp = compat_ptr(hdr32.sbp),
		.timeout = hdr32.timeout,
		.flags = hdr32.flags,
		.pack_id = hdr32.pack_id,
		.usr_ptr = compat_ptr(hdr32.usr_ptr),
		.status = hdr32.status,
		.masked_status = hdr32.masked_status,
		.msg_status = hdr32.msg_status,
		.sb_len_wr = hdr32.sb_len_wr,
		.host_status = hdr32.host_status,
		.driver_status = hdr32.driver_status,
		.resid = hdr32.resid,
		.duration = hdr32.duration,
		.info = hdr32.info,
		};

		return 0;
		}
		#endif

		if (copy_from_user(hdr, argp, sizeof(*hdr)))
		return -EFAULT;

		return 0;
		}
		EXPORT_SYMBOL(get_sg_io_hdr);

		#ifdef CONFIG_COMPAT
		struct compat_cdrom_generic_command {
		unsigned char cmd[CDROM_PACKET_SIZE];
		compat_caddr_t buffer;
		compat_uint_t buflen;
		compat_int_t stat;
		compat_caddr_t sense;
		unsigned char data_direction;
		unsigned char pad[3];
		compat_int_t quiet;
		compat_int_t timeout;
		compat_caddr_t unused;
		};
		#endif

		static int scsi_get_cdrom_generic_arg(struct cdrom_generic_command *cgc,
		const void __user *arg)
		{
		#ifdef CONFIG_COMPAT
		if (in_compat_syscall()) {
		struct compat_cdrom_generic_command cgc32;

		if (copy_from_user(&cgc32, arg, sizeof(cgc32)))
		return -EFAULT;

		*cgc = (struct cdrom_generic_command) {
		.buffer = compat_ptr(cgc32.buffer),
		.buflen = cgc32.buflen,
		.stat = cgc32.stat,
		.sense = compat_ptr(cgc32.sense),
		.data_direction = cgc32.data_direction,
		.quiet = cgc32.quiet,
		.timeout = cgc32.timeout,
		.unused = compat_ptr(cgc32.unused),
		};
		memcpy(&cgc->cmd, &cgc32.cmd, CDROM_PACKET_SIZE);
		return 0;
		}
		#endif
		if (copy_from_user(cgc, arg, sizeof(*cgc)))
		return -EFAULT;

		return 0;
		}

		static int scsi_put_cdrom_generic_arg(const struct cdrom_generic_command *cgc,
		void __user *arg)
		{
		#ifdef CONFIG_COMPAT
		if (in_compat_syscall()) {
		struct compat_cdrom_generic_command cgc32 = {
		.buffer = (uintptr_t)(cgc->buffer),
		.buflen = cgc->buflen,
		.stat = cgc->stat,
		.sense = (uintptr_t)(cgc->sense),
		.data_direction = cgc->data_direction,
		.quiet = cgc->quiet,
		.timeout = cgc->timeout,
		.unused = (uintptr_t)(cgc->unused),
		};
		memcpy(&cgc32.cmd, &cgc->cmd, CDROM_PACKET_SIZE);

		if (copy_to_user(arg, &cgc32, sizeof(cgc32)))
		return -EFAULT;

		return 0;
		}
		#endif
		if (copy_to_user(arg, cgc, sizeof(*cgc)))
		return -EFAULT;

		return 0;
		}

		static int scsi_cdrom_send_packet(struct request_queue *q,
		struct gendisk *bd_disk,
		fmode_t mode, void __user *arg)
		{
		struct cdrom_generic_command cgc;
		struct sg_io_hdr hdr;
		int err;

		err = scsi_get_cdrom_generic_arg(&cgc, arg);
		if (err)
		return err;

		cgc.timeout = clock_t_to_jiffies(cgc.timeout);
		memset(&hdr, 0, sizeof(hdr));
		hdr.interface_id = 'S';
		hdr.cmd_len = sizeof(cgc.cmd);
		hdr.dxfer_len = cgc.buflen;
		switch (cgc.data_direction) {
		case CGC_DATA_UNKNOWN:
		hdr.dxfer_direction = SG_DXFER_UNKNOWN;
		break;
		case CGC_DATA_WRITE:
		hdr.dxfer_direction = SG_DXFER_TO_DEV;
		break;
		case CGC_DATA_READ:
		hdr.dxfer_direction = SG_DXFER_FROM_DEV;
		break;
		case CGC_DATA_NONE:
		hdr.dxfer_direction = SG_DXFER_NONE;
		break;
		default:
		return -EINVAL;
		}

		hdr.dxferp = cgc.buffer;
		hdr.sbp = cgc.sense;
		if (hdr.sbp)
		hdr.mx_sb_len = sizeof(struct request_sense);
		hdr.timeout = jiffies_to_msecs(cgc.timeout);
		hdr.cmdp = ((struct cdrom_generic_command __user*) arg)->cmd;
		hdr.cmd_len = sizeof(cgc.cmd);

		err = sg_io(q, bd_disk, &hdr, mode);
		if (err == -EFAULT)
		return -EFAULT;

		if (hdr.status)
		return -EIO;

		cgc.stat = err;
		cgc.buflen = hdr.resid;
		if (scsi_put_cdrom_generic_arg(&cgc, arg))
		return -EFAULT;

		return err;
		}

		int scsi_cmd_ioctl(struct request_queue q, struct gendisk bd_disk, fmode_t mode,
		unsigned int cmd, void __user *arg)
		{
		int err;

		if (!q)
		return -ENXIO;

		switch (cmd) {
		/*
		* new sgv3 interface
		*/
		case SG_GET_VERSION_NUM:
		err = sg_get_version(arg);
		break;
		case SG_SET_TIMEOUT:
		err = sg_set_timeout(q, arg);
		break;
		case SG_GET_TIMEOUT:
		err = sg_get_timeout(q);
		break;
		case SG_GET_RESERVED_SIZE:
		err = sg_get_reserved_size(q, arg);
		break;
		case SG_SET_RESERVED_SIZE:
		err = sg_set_reserved_size(q, arg);
		break;
		case SG_EMULATED_HOST:
		err = sg_emulated_host(q, arg);
		break;
		case SG_IO: {
		struct sg_io_hdr hdr;

		err = get_sg_io_hdr(&hdr, arg);
		if (err)
		break;
		err = sg_io(q, bd_disk, &hdr, mode);
		if (err == -EFAULT)
		break;

		if (put_sg_io_hdr(&hdr, arg))
		err = -EFAULT;
		break;
		}
		case CDROM_SEND_PACKET:
		err = scsi_cdrom_send_packet(q, bd_disk, mode, arg);
		break;

		/*
		* old junk scsi send command ioctl
		*/
		case SCSI_IOCTL_SEND_COMMAND:
		printk(KERN_WARNING "program %s is using a deprecated SCSI ioctl, please convert it to SG_IO\n", current->comm);
		err = -EINVAL;
		if (!arg)
		break;

		err = sg_scsi_ioctl(q, bd_disk, mode, arg);
		break;
		case CDROMCLOSETRAY:
		err = blk_send_start_stop(q, bd_disk, 0x03);
		break;
		case CDROMEJECT:
		err = blk_send_start_stop(q, bd_disk, 0x02);
		break;
		default:
		err = -ENOTTY;
		}

		return err;
		}
		EXPORT_SYMBOL(scsi_cmd_ioctl);

drivers/scsi/scsi_ioctl.c

+735 −5

File changed.

Preview size limit exceeded, changes collapsed.

include/linux/blkdev.h

+0 −11

Original line number	Diff line number	Diff line
		@@ -28,8 +28,6 @@
		#include <linux/sbitmap.h>

		struct module;
		struct scsi_ioctl_command;

		struct request_queue;
		struct elevator_queue;
		struct blk_trace;
		@@ -888,13 +886,6 @@ extern blk_status_t blk_insert_cloned_request(struct request_queue *q,
		struct request *rq);
		int blk_rq_append_bio(struct request rq, struct bio bio);
		extern void blk_queue_split(struct bio **);
		extern int scsi_cmd_ioctl(struct request_queue , struct gendisk , fmode_t,
		unsigned int, void __user *);
		extern int sg_scsi_ioctl(struct request_queue , struct gendisk , fmode_t,
		struct scsi_ioctl_command __user *);
		extern int get_sg_io_hdr(struct sg_io_hdr hdr, const void __user argp);
		extern int put_sg_io_hdr(const struct sg_io_hdr hdr, void __user argp);

		extern int blk_queue_enter(struct request_queue *q, blk_mq_req_flags_t flags);
		extern void blk_queue_exit(struct request_queue *q);
		extern void blk_sync_queue(struct request_queue *q);
		@@ -1343,8 +1334,6 @@ static inline int sb_issue_zeroout(struct super_block *sb, sector_t block,
		gfp_mask, 0);
		}

		bool scsi_cmd_allowed(unsigned char *cmd, fmode_t mode);

		static inline bool bdev_is_partition(struct block_device *bdev)
		{
		return bdev->bd_partno;

include/scsi/scsi_ioctl.h

+6 −0

Original line number	Diff line number	Diff line
		@@ -20,6 +20,7 @@

		struct gendisk;
		struct scsi_device;
		struct sg_io_hdr;

		/*
		* Structures used for scsi_ioctl et al.
		@@ -46,6 +47,11 @@ int scsi_ioctl_block_when_processing_errors(struct scsi_device *sdev,
		int cmd, bool ndelay);
		int scsi_ioctl(struct scsi_device sdev, struct gendisk disk, fmode_t mode,
		int cmd, void __user *arg);
		int sg_scsi_ioctl(struct request_queue q, struct gendisk disk, fmode_t mode,
		struct scsi_ioctl_command __user *argp);
		int get_sg_io_hdr(struct sg_io_hdr hdr, const void __user argp);
		int put_sg_io_hdr(const struct sg_io_hdr hdr, void __user argp);
		bool scsi_cmd_allowed(unsigned char *cmd, fmode_t mode);

		#endif /* __KERNEL__ */
		#endif /* _SCSI_IOCTL_H */