mirror of
https://github.com/Fishwaldo/Star64_linux.git
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scsi: scsi_ioctl: Move the "block layer" SCSI ioctl handling to drivers/scsi
Merge the ioctl handling in block/scsi_ioctl.c into its only caller in drivers/scsi/scsi_ioctl.c. Link: https://lore.kernel.org/r/20210724072033.1284840-19-hch@lst.de Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
parent
7353dc06c9
commit
f2542a3be3
5 changed files with 742 additions and 814 deletions
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@ -12,7 +12,6 @@ obj-$(CONFIG_BLOCK) := bio.o elevator.o blk-core.o blk-sysfs.o \
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disk-events.o
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obj-$(CONFIG_BOUNCE) += bounce.o
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obj-$(CONFIG_BLK_SCSI_REQUEST) += scsi_ioctl.o
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obj-$(CONFIG_BLK_DEV_BSG_COMMON) += bsg.o
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obj-$(CONFIG_BLK_DEV_BSGLIB) += bsg-lib.o
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obj-$(CONFIG_BLK_CGROUP) += blk-cgroup.o
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@ -1,796 +0,0 @@
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// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2001 Jens Axboe <axboe@suse.de>
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*/
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#include <linux/compat.h>
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/string.h>
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#include <linux/module.h>
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#include <linux/blkdev.h>
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#include <linux/capability.h>
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#include <linux/completion.h>
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#include <linux/cdrom.h>
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#include <linux/ratelimit.h>
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#include <linux/slab.h>
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#include <linux/times.h>
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#include <linux/uio.h>
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#include <linux/uaccess.h>
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#include <scsi/scsi.h>
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#include <scsi/scsi_ioctl.h>
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#include <scsi/scsi_cmnd.h>
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#include <scsi/sg.h>
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static int sg_get_version(int __user *p)
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{
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static const int sg_version_num = 30527;
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return put_user(sg_version_num, p);
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}
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static int sg_get_timeout(struct request_queue *q)
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{
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return jiffies_to_clock_t(q->sg_timeout);
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}
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static int sg_set_timeout(struct request_queue *q, int __user *p)
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{
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int timeout, err = get_user(timeout, p);
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if (!err)
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q->sg_timeout = clock_t_to_jiffies(timeout);
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return err;
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}
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static int sg_get_reserved_size(struct request_queue *q, int __user *p)
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{
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int val = min(q->sg_reserved_size, queue_max_bytes(q));
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return put_user(val, p);
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}
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static int sg_set_reserved_size(struct request_queue *q, int __user *p)
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{
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int size, err = get_user(size, p);
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if (err)
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return err;
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if (size < 0)
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return -EINVAL;
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q->sg_reserved_size = min_t(unsigned int, size, queue_max_bytes(q));
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return 0;
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}
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/*
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* will always return that we are ATAPI even for a real SCSI drive, I'm not
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* so sure this is worth doing anything about (why would you care??)
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*/
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static int sg_emulated_host(struct request_queue *q, int __user *p)
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{
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return put_user(1, p);
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}
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/*
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* Check if the given command is allowed.
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*
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* For unprivileged users only a small set of whitelisted command is allowed so
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* that they can't format the drive or update the firmware.
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*/
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bool scsi_cmd_allowed(unsigned char *cmd, fmode_t mode)
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{
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/* root can do any command. */
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if (capable(CAP_SYS_RAWIO))
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return true;
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/* Anybody who can open the device can do a read-safe command */
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switch (cmd[0]) {
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/* Basic read-only commands */
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case TEST_UNIT_READY:
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case REQUEST_SENSE:
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case READ_6:
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case READ_10:
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case READ_12:
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case READ_16:
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case READ_BUFFER:
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case READ_DEFECT_DATA:
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case READ_CAPACITY: /* also GPCMD_READ_CDVD_CAPACITY */
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case READ_LONG:
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case INQUIRY:
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case MODE_SENSE:
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case MODE_SENSE_10:
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case LOG_SENSE:
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case START_STOP:
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case GPCMD_VERIFY_10:
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case VERIFY_16:
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case REPORT_LUNS:
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case SERVICE_ACTION_IN_16:
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case RECEIVE_DIAGNOSTIC:
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case MAINTENANCE_IN: /* also GPCMD_SEND_KEY, which is a write command */
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case GPCMD_READ_BUFFER_CAPACITY:
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/* Audio CD commands */
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case GPCMD_PLAY_CD:
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case GPCMD_PLAY_AUDIO_10:
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case GPCMD_PLAY_AUDIO_MSF:
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case GPCMD_PLAY_AUDIO_TI:
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case GPCMD_PAUSE_RESUME:
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/* CD/DVD data reading */
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case GPCMD_READ_CD:
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case GPCMD_READ_CD_MSF:
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case GPCMD_READ_DISC_INFO:
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case GPCMD_READ_DVD_STRUCTURE:
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case GPCMD_READ_HEADER:
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case GPCMD_READ_TRACK_RZONE_INFO:
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case GPCMD_READ_SUBCHANNEL:
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case GPCMD_READ_TOC_PMA_ATIP:
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case GPCMD_REPORT_KEY:
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case GPCMD_SCAN:
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case GPCMD_GET_CONFIGURATION:
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case GPCMD_READ_FORMAT_CAPACITIES:
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case GPCMD_GET_EVENT_STATUS_NOTIFICATION:
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case GPCMD_GET_PERFORMANCE:
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case GPCMD_SEEK:
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case GPCMD_STOP_PLAY_SCAN:
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/* ZBC */
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case ZBC_IN:
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return true;
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/* Basic writing commands */
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case WRITE_6:
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case WRITE_10:
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case WRITE_VERIFY:
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case WRITE_12:
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case WRITE_VERIFY_12:
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case WRITE_16:
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case WRITE_LONG:
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case WRITE_LONG_2:
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case WRITE_SAME:
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case WRITE_SAME_16:
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case WRITE_SAME_32:
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case ERASE:
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case GPCMD_MODE_SELECT_10:
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case MODE_SELECT:
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case LOG_SELECT:
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case GPCMD_BLANK:
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case GPCMD_CLOSE_TRACK:
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case GPCMD_FLUSH_CACHE:
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case GPCMD_FORMAT_UNIT:
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case GPCMD_REPAIR_RZONE_TRACK:
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case GPCMD_RESERVE_RZONE_TRACK:
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case GPCMD_SEND_DVD_STRUCTURE:
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case GPCMD_SEND_EVENT:
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case GPCMD_SEND_OPC:
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case GPCMD_SEND_CUE_SHEET:
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case GPCMD_SET_SPEED:
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case GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL:
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case GPCMD_LOAD_UNLOAD:
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case GPCMD_SET_STREAMING:
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case GPCMD_SET_READ_AHEAD:
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/* ZBC */
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case ZBC_OUT:
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return (mode & FMODE_WRITE);
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default:
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return false;
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}
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}
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EXPORT_SYMBOL(scsi_cmd_allowed);
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static int blk_fill_sghdr_rq(struct request_queue *q, struct request *rq,
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struct sg_io_hdr *hdr, fmode_t mode)
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{
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struct scsi_request *req = scsi_req(rq);
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if (copy_from_user(req->cmd, hdr->cmdp, hdr->cmd_len))
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return -EFAULT;
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if (!scsi_cmd_allowed(req->cmd, mode))
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return -EPERM;
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/*
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* fill in request structure
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*/
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req->cmd_len = hdr->cmd_len;
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rq->timeout = msecs_to_jiffies(hdr->timeout);
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if (!rq->timeout)
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rq->timeout = q->sg_timeout;
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if (!rq->timeout)
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rq->timeout = BLK_DEFAULT_SG_TIMEOUT;
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if (rq->timeout < BLK_MIN_SG_TIMEOUT)
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rq->timeout = BLK_MIN_SG_TIMEOUT;
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return 0;
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}
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static int blk_complete_sghdr_rq(struct request *rq, struct sg_io_hdr *hdr,
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struct bio *bio)
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{
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struct scsi_request *req = scsi_req(rq);
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int r, ret = 0;
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/*
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* fill in all the output members
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*/
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hdr->status = req->result & 0xff;
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hdr->masked_status = status_byte(req->result);
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hdr->msg_status = COMMAND_COMPLETE;
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hdr->host_status = host_byte(req->result);
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hdr->driver_status = 0;
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if (scsi_status_is_check_condition(hdr->status))
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hdr->driver_status = DRIVER_SENSE;
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hdr->info = 0;
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if (hdr->masked_status || hdr->host_status || hdr->driver_status)
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hdr->info |= SG_INFO_CHECK;
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hdr->resid = req->resid_len;
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hdr->sb_len_wr = 0;
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if (req->sense_len && hdr->sbp) {
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int len = min((unsigned int) hdr->mx_sb_len, req->sense_len);
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if (!copy_to_user(hdr->sbp, req->sense, len))
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hdr->sb_len_wr = len;
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else
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ret = -EFAULT;
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}
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r = blk_rq_unmap_user(bio);
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if (!ret)
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ret = r;
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return ret;
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}
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static int sg_io(struct request_queue *q, struct gendisk *bd_disk,
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struct sg_io_hdr *hdr, fmode_t mode)
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{
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unsigned long start_time;
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ssize_t ret = 0;
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int writing = 0;
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int at_head = 0;
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struct request *rq;
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struct scsi_request *req;
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struct bio *bio;
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if (hdr->interface_id != 'S')
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return -EINVAL;
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if (hdr->dxfer_len > (queue_max_hw_sectors(q) << 9))
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return -EIO;
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if (hdr->dxfer_len)
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switch (hdr->dxfer_direction) {
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default:
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return -EINVAL;
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case SG_DXFER_TO_DEV:
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writing = 1;
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break;
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case SG_DXFER_TO_FROM_DEV:
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case SG_DXFER_FROM_DEV:
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break;
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}
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if (hdr->flags & SG_FLAG_Q_AT_HEAD)
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at_head = 1;
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ret = -ENOMEM;
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rq = blk_get_request(q, writing ? REQ_OP_DRV_OUT : REQ_OP_DRV_IN, 0);
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if (IS_ERR(rq))
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return PTR_ERR(rq);
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req = scsi_req(rq);
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if (hdr->cmd_len > BLK_MAX_CDB) {
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req->cmd = kzalloc(hdr->cmd_len, GFP_KERNEL);
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if (!req->cmd)
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goto out_put_request;
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}
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ret = blk_fill_sghdr_rq(q, rq, hdr, mode);
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if (ret < 0)
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goto out_free_cdb;
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ret = 0;
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if (hdr->iovec_count) {
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struct iov_iter i;
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struct iovec *iov = NULL;
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ret = import_iovec(rq_data_dir(rq), hdr->dxferp,
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hdr->iovec_count, 0, &iov, &i);
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if (ret < 0)
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goto out_free_cdb;
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/* SG_IO howto says that the shorter of the two wins */
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iov_iter_truncate(&i, hdr->dxfer_len);
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ret = blk_rq_map_user_iov(q, rq, NULL, &i, GFP_KERNEL);
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kfree(iov);
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} else if (hdr->dxfer_len)
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ret = blk_rq_map_user(q, rq, NULL, hdr->dxferp, hdr->dxfer_len,
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GFP_KERNEL);
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if (ret)
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goto out_free_cdb;
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bio = rq->bio;
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req->retries = 0;
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start_time = jiffies;
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blk_execute_rq(bd_disk, rq, at_head);
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hdr->duration = jiffies_to_msecs(jiffies - start_time);
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ret = blk_complete_sghdr_rq(rq, hdr, bio);
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out_free_cdb:
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scsi_req_free_cmd(req);
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out_put_request:
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blk_put_request(rq);
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return ret;
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}
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/**
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* sg_scsi_ioctl -- handle deprecated SCSI_IOCTL_SEND_COMMAND ioctl
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* @q: request queue to send scsi commands down
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* @disk: gendisk to operate on (option)
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* @mode: mode used to open the file through which the ioctl has been
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* submitted
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* @sic: userspace structure describing the command to perform
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*
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* Send down the scsi command described by @sic to the device below
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* the request queue @q. If @file is non-NULL it's used to perform
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* fine-grained permission checks that allow users to send down
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* non-destructive SCSI commands. If the caller has a struct gendisk
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* available it should be passed in as @disk to allow the low level
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* driver to use the information contained in it. A non-NULL @disk
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* is only allowed if the caller knows that the low level driver doesn't
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* need it (e.g. in the scsi subsystem).
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*
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* Notes:
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* - This interface is deprecated - users should use the SG_IO
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* interface instead, as this is a more flexible approach to
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* performing SCSI commands on a device.
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* - The SCSI command length is determined by examining the 1st byte
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* of the given command. There is no way to override this.
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* - Data transfers are limited to PAGE_SIZE
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* - The length (x + y) must be at least OMAX_SB_LEN bytes long to
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* accommodate the sense buffer when an error occurs.
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* The sense buffer is truncated to OMAX_SB_LEN (16) bytes so that
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* old code will not be surprised.
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* - If a Unix error occurs (e.g. ENOMEM) then the user will receive
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* a negative return and the Unix error code in 'errno'.
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* If the SCSI command succeeds then 0 is returned.
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* Positive numbers returned are the compacted SCSI error codes (4
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* bytes in one int) where the lowest byte is the SCSI status.
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*/
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int sg_scsi_ioctl(struct request_queue *q, struct gendisk *disk, fmode_t mode,
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struct scsi_ioctl_command __user *sic)
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{
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enum { OMAX_SB_LEN = 16 }; /* For backward compatibility */
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struct request *rq;
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struct scsi_request *req;
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int err;
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unsigned int in_len, out_len, bytes, opcode, cmdlen;
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char *buffer = NULL;
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if (!sic)
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return -EINVAL;
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/*
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* get in an out lengths, verify they don't exceed a page worth of data
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*/
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if (get_user(in_len, &sic->inlen))
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return -EFAULT;
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if (get_user(out_len, &sic->outlen))
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return -EFAULT;
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if (in_len > PAGE_SIZE || out_len > PAGE_SIZE)
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return -EINVAL;
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if (get_user(opcode, sic->data))
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return -EFAULT;
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bytes = max(in_len, out_len);
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if (bytes) {
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buffer = kzalloc(bytes, GFP_NOIO | GFP_USER | __GFP_NOWARN);
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if (!buffer)
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return -ENOMEM;
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}
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rq = blk_get_request(q, in_len ? REQ_OP_DRV_OUT : REQ_OP_DRV_IN, 0);
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if (IS_ERR(rq)) {
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err = PTR_ERR(rq);
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goto error_free_buffer;
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}
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req = scsi_req(rq);
|
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cmdlen = COMMAND_SIZE(opcode);
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/*
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* get command and data to send to device, if any
|
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*/
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err = -EFAULT;
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req->cmd_len = cmdlen;
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if (copy_from_user(req->cmd, sic->data, cmdlen))
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goto error;
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|
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if (in_len && copy_from_user(buffer, sic->data + cmdlen, in_len))
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goto error;
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|
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err = -EPERM;
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if (!scsi_cmd_allowed(req->cmd, mode))
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goto error;
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|
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/* default. possible overriden later */
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req->retries = 5;
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switch (opcode) {
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case SEND_DIAGNOSTIC:
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case FORMAT_UNIT:
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rq->timeout = FORMAT_UNIT_TIMEOUT;
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req->retries = 1;
|
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break;
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case START_STOP:
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rq->timeout = START_STOP_TIMEOUT;
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break;
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case MOVE_MEDIUM:
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rq->timeout = MOVE_MEDIUM_TIMEOUT;
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break;
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case READ_ELEMENT_STATUS:
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rq->timeout = READ_ELEMENT_STATUS_TIMEOUT;
|
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break;
|
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case READ_DEFECT_DATA:
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rq->timeout = READ_DEFECT_DATA_TIMEOUT;
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req->retries = 1;
|
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break;
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default:
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rq->timeout = BLK_DEFAULT_SG_TIMEOUT;
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break;
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}
|
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|
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if (bytes) {
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err = blk_rq_map_kern(q, rq, buffer, bytes, GFP_NOIO);
|
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if (err)
|
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goto error;
|
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}
|
||||
|
||||
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);
|
|
@ -14,6 +14,7 @@
|
|||
#include <linux/mm.h>
|
||||
#include <linux/string.h>
|
||||
#include <linux/uaccess.h>
|
||||
#include <linux/cdrom.h>
|
||||
|
||||
#include <scsi/scsi.h>
|
||||
#include <scsi/scsi_cmnd.h>
|
||||
|
@ -189,6 +190,706 @@ static int scsi_ioctl_get_pci(struct scsi_device *sdev, void __user *arg)
|
|||
? -EFAULT: 0;
|
||||
}
|
||||
|
||||
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);
|
||||
}
|
||||
|
||||
/* 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);
|
||||
}
|
||||
|
||||
/*
|
||||
* Check if the given command is allowed.
|
||||
*
|
||||
* Only a subset of commands are allowed for unprivileged users. Commands used
|
||||
* to format the media, update the firmware, etc. are not permitted.
|
||||
*/
|
||||
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 scsi_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 scsi_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 = scsi_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 = scsi_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 overridden 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);
|
||||
|
||||
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;
|
||||
}
|
||||
|
||||
/**
|
||||
* scsi_ioctl - Dispatch ioctl to scsi device
|
||||
* @sdev: scsi device receiving ioctl
|
||||
|
@ -225,13 +926,42 @@ int scsi_ioctl(struct scsi_device *sdev, struct gendisk *disk, fmode_t mode,
|
|||
break;
|
||||
}
|
||||
|
||||
if (cmd != SCSI_IOCTL_GET_IDLUN && cmd != SCSI_IOCTL_GET_BUS_NUMBER) {
|
||||
error = scsi_cmd_ioctl(q, disk, mode, cmd, arg);
|
||||
if (error != -ENOTTY)
|
||||
return error;
|
||||
}
|
||||
|
||||
switch (cmd) {
|
||||
case SG_GET_VERSION_NUM:
|
||||
return sg_get_version(arg);
|
||||
case SG_SET_TIMEOUT:
|
||||
return sg_set_timeout(q, arg);
|
||||
case SG_GET_TIMEOUT:
|
||||
return sg_get_timeout(q);
|
||||
case SG_GET_RESERVED_SIZE:
|
||||
return sg_get_reserved_size(q, arg);
|
||||
case SG_SET_RESERVED_SIZE:
|
||||
return sg_set_reserved_size(q, arg);
|
||||
case SG_EMULATED_HOST:
|
||||
return sg_emulated_host(q, arg);
|
||||
case SG_IO: {
|
||||
struct sg_io_hdr hdr;
|
||||
|
||||
error = get_sg_io_hdr(&hdr, arg);
|
||||
if (error)
|
||||
return error;
|
||||
|
||||
error = sg_io(q, disk, &hdr, mode);
|
||||
if (error == -EFAULT)
|
||||
return error;
|
||||
|
||||
if (put_sg_io_hdr(&hdr, arg))
|
||||
return -EFAULT;
|
||||
return 0;
|
||||
}
|
||||
case SCSI_IOCTL_SEND_COMMAND:
|
||||
return sg_scsi_ioctl(q, disk, mode, arg);
|
||||
case CDROM_SEND_PACKET:
|
||||
return scsi_cdrom_send_packet(q, disk, mode, arg);
|
||||
case CDROMCLOSETRAY:
|
||||
return blk_send_start_stop(q, disk, 0x03);
|
||||
case CDROMEJECT:
|
||||
return blk_send_start_stop(q, disk, 0x02);
|
||||
case SCSI_IOCTL_GET_IDLUN: {
|
||||
struct scsi_idlun v = {
|
||||
.dev_id = (sdev->id & 0xff)
|
||||
|
|
|
@ -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;
|
||||
|
|
|
@ -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 */
|
||||
|
|
Loading…
Add table
Reference in a new issue