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989 lines
24 KiB
989 lines
24 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Changes: |
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* Arnaldo Carvalho de Melo <[email protected]> 08/23/2000 |
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* - get rid of some verify_areas and use __copy*user and __get/put_user |
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* for the ones that remain |
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*/ |
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#include <linux/module.h> |
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#include <linux/blkdev.h> |
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#include <linux/interrupt.h> |
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#include <linux/errno.h> |
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#include <linux/kernel.h> |
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#include <linux/sched.h> |
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#include <linux/mm.h> |
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#include <linux/string.h> |
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#include <linux/uaccess.h> |
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#include <linux/cdrom.h> |
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|
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#include <scsi/scsi.h> |
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#include <scsi/scsi_cmnd.h> |
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#include <scsi/scsi_device.h> |
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#include <scsi/scsi_eh.h> |
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#include <scsi/scsi_host.h> |
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#include <scsi/scsi_ioctl.h> |
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#include <scsi/sg.h> |
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#include <scsi/scsi_dbg.h> |
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|
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#include "scsi_logging.h" |
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|
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#define NORMAL_RETRIES 5 |
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#define IOCTL_NORMAL_TIMEOUT (10 * HZ) |
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|
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#define MAX_BUF PAGE_SIZE |
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|
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/** |
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* ioctl_probe -- return host identification |
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* @host: host to identify |
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* @buffer: userspace buffer for identification |
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* |
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* Return an identifying string at @buffer, if @buffer is non-NULL, filling |
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* to the length stored at * (int *) @buffer. |
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*/ |
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static int ioctl_probe(struct Scsi_Host *host, void __user *buffer) |
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{ |
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unsigned int len, slen; |
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const char *string; |
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|
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if (buffer) { |
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if (get_user(len, (unsigned int __user *) buffer)) |
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return -EFAULT; |
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|
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if (host->hostt->info) |
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string = host->hostt->info(host); |
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else |
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string = host->hostt->name; |
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if (string) { |
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slen = strlen(string); |
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if (len > slen) |
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len = slen + 1; |
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if (copy_to_user(buffer, string, len)) |
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return -EFAULT; |
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} |
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} |
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return 1; |
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} |
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|
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static int ioctl_internal_command(struct scsi_device *sdev, char *cmd, |
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int timeout, int retries) |
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{ |
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int result; |
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struct scsi_sense_hdr sshdr; |
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|
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SCSI_LOG_IOCTL(1, sdev_printk(KERN_INFO, sdev, |
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"Trying ioctl with scsi command %d\n", *cmd)); |
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|
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result = scsi_execute_req(sdev, cmd, DMA_NONE, NULL, 0, |
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&sshdr, timeout, retries, NULL); |
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SCSI_LOG_IOCTL(2, sdev_printk(KERN_INFO, sdev, |
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"Ioctl returned 0x%x\n", result)); |
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|
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if (result < 0) |
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goto out; |
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if (scsi_sense_valid(&sshdr)) { |
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switch (sshdr.sense_key) { |
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case ILLEGAL_REQUEST: |
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if (cmd[0] == ALLOW_MEDIUM_REMOVAL) |
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sdev->lockable = 0; |
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else |
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sdev_printk(KERN_INFO, sdev, |
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"ioctl_internal_command: " |
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"ILLEGAL REQUEST " |
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"asc=0x%x ascq=0x%x\n", |
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sshdr.asc, sshdr.ascq); |
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break; |
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case NOT_READY: /* This happens if there is no disc in drive */ |
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if (sdev->removable) |
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break; |
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fallthrough; |
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case UNIT_ATTENTION: |
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if (sdev->removable) { |
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sdev->changed = 1; |
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result = 0; /* This is no longer considered an error */ |
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break; |
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} |
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fallthrough; /* for non-removable media */ |
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default: |
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sdev_printk(KERN_INFO, sdev, |
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"ioctl_internal_command return code = %x\n", |
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result); |
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scsi_print_sense_hdr(sdev, NULL, &sshdr); |
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break; |
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} |
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} |
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out: |
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SCSI_LOG_IOCTL(2, sdev_printk(KERN_INFO, sdev, |
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"IOCTL Releasing command\n")); |
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return result; |
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} |
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int scsi_set_medium_removal(struct scsi_device *sdev, char state) |
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{ |
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char scsi_cmd[MAX_COMMAND_SIZE]; |
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int ret; |
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if (!sdev->removable || !sdev->lockable) |
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return 0; |
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scsi_cmd[0] = ALLOW_MEDIUM_REMOVAL; |
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scsi_cmd[1] = 0; |
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scsi_cmd[2] = 0; |
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scsi_cmd[3] = 0; |
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scsi_cmd[4] = state; |
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scsi_cmd[5] = 0; |
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|
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ret = ioctl_internal_command(sdev, scsi_cmd, |
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IOCTL_NORMAL_TIMEOUT, NORMAL_RETRIES); |
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if (ret == 0) |
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sdev->locked = (state == SCSI_REMOVAL_PREVENT); |
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return ret; |
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} |
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EXPORT_SYMBOL(scsi_set_medium_removal); |
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|
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/* |
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* The scsi_ioctl_get_pci() function places into arg the value |
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* pci_dev::slot_name (8 characters) for the PCI device (if any). |
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* Returns: 0 on success |
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* -ENXIO if there isn't a PCI device pointer |
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* (could be because the SCSI driver hasn't been |
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* updated yet, or because it isn't a SCSI |
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* device) |
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* any copy_to_user() error on failure there |
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*/ |
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static int scsi_ioctl_get_pci(struct scsi_device *sdev, void __user *arg) |
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{ |
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struct device *dev = scsi_get_device(sdev->host); |
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const char *name; |
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if (!dev) |
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return -ENXIO; |
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name = dev_name(dev); |
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|
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/* compatibility with old ioctl which only returned |
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* 20 characters */ |
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return copy_to_user(arg, name, min(strlen(name), (size_t)20)) |
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? -EFAULT: 0; |
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} |
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|
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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_set_timeout(struct scsi_device *sdev, 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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sdev->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 scsi_device *sdev, int __user *p) |
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{ |
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int val = min(sdev->sg_reserved_size, |
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queue_max_bytes(sdev->request_queue)); |
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|
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return put_user(val, p); |
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} |
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static int sg_set_reserved_size(struct scsi_device *sdev, 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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sdev->sg_reserved_size = min_t(unsigned int, size, |
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queue_max_bytes(sdev->request_queue)); |
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return 0; |
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} |
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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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static int scsi_get_idlun(struct scsi_device *sdev, void __user *argp) |
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{ |
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struct scsi_idlun v = { |
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.dev_id = (sdev->id & 0xff) + |
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((sdev->lun & 0xff) << 8) + |
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((sdev->channel & 0xff) << 16) + |
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((sdev->host->host_no & 0xff) << 24), |
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.host_unique_id = sdev->host->unique_id |
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}; |
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if (copy_to_user(argp, &v, sizeof(struct scsi_idlun))) |
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return -EFAULT; |
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return 0; |
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} |
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static int scsi_send_start_stop(struct scsi_device *sdev, int data) |
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{ |
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u8 cdb[MAX_COMMAND_SIZE] = { }; |
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cdb[0] = START_STOP; |
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cdb[4] = data; |
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return ioctl_internal_command(sdev, cdb, START_STOP_TIMEOUT, |
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NORMAL_RETRIES); |
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} |
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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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* Only a subset of commands are allowed for unprivileged users. Commands used |
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* to format the media, update the firmware, etc. are not permitted. |
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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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|
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static int scsi_fill_sghdr_rq(struct scsi_device *sdev, 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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|
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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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/* |
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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 = sdev->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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|
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return 0; |
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} |
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|
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static int scsi_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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/* |
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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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|
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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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|
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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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|
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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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|
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return ret; |
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} |
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|
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static int sg_io(struct scsi_device *sdev, struct gendisk *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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|
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if (hdr->interface_id != 'S') |
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return -EINVAL; |
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|
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if (hdr->dxfer_len > (queue_max_hw_sectors(sdev->request_queue) << 9)) |
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return -EIO; |
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|
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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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|
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ret = -ENOMEM; |
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rq = blk_get_request(sdev->request_queue, writing ? |
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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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|
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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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|
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ret = scsi_fill_sghdr_rq(sdev, rq, hdr, mode); |
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if (ret < 0) |
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goto out_free_cdb; |
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|
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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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|
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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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|
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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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|
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ret = blk_rq_map_user_iov(rq->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(rq->q, rq, NULL, hdr->dxferp, |
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hdr->dxfer_len, GFP_KERNEL); |
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|
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if (ret) |
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goto out_free_cdb; |
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|
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bio = rq->bio; |
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req->retries = 0; |
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|
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start_time = jiffies; |
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|
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blk_execute_rq(disk, rq, at_head); |
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|
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hdr->duration = jiffies_to_msecs(jiffies - start_time); |
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|
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ret = scsi_complete_sghdr_rq(rq, hdr, bio); |
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|
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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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/** |
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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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static int sg_scsi_ioctl(struct request_queue *q, struct gendisk *disk, |
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fmode_t mode, 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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|
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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; |
|
|
|
} |
|
|
|
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; |
|
} |
|
|
|
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 scsi_device *sdev, struct gendisk *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(sdev, 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; |
|
} |
|
|
|
static int scsi_ioctl_sg_io(struct scsi_device *sdev, struct gendisk *disk, |
|
fmode_t mode, void __user *argp) |
|
{ |
|
struct sg_io_hdr hdr; |
|
int error; |
|
|
|
error = get_sg_io_hdr(&hdr, argp); |
|
if (error) |
|
return error; |
|
error = sg_io(sdev, disk, &hdr, mode); |
|
if (error == -EFAULT) |
|
return error; |
|
if (put_sg_io_hdr(&hdr, argp)) |
|
return -EFAULT; |
|
return error; |
|
} |
|
|
|
/** |
|
* scsi_ioctl - Dispatch ioctl to scsi device |
|
* @sdev: scsi device receiving ioctl |
|
* @disk: disk receiving the ioctl |
|
* @mode: mode the block/char device is opened with |
|
* @cmd: which ioctl is it |
|
* @arg: data associated with ioctl |
|
* |
|
* Description: The scsi_ioctl() function differs from most ioctls in that it |
|
* does not take a major/minor number as the dev field. Rather, it takes |
|
* a pointer to a &struct scsi_device. |
|
*/ |
|
int scsi_ioctl(struct scsi_device *sdev, struct gendisk *disk, fmode_t mode, |
|
int cmd, void __user *arg) |
|
{ |
|
struct request_queue *q = sdev->request_queue; |
|
struct scsi_sense_hdr sense_hdr; |
|
|
|
/* Check for deprecated ioctls ... all the ioctls which don't |
|
* follow the new unique numbering scheme are deprecated */ |
|
switch (cmd) { |
|
case SCSI_IOCTL_SEND_COMMAND: |
|
case SCSI_IOCTL_TEST_UNIT_READY: |
|
case SCSI_IOCTL_BENCHMARK_COMMAND: |
|
case SCSI_IOCTL_SYNC: |
|
case SCSI_IOCTL_START_UNIT: |
|
case SCSI_IOCTL_STOP_UNIT: |
|
printk(KERN_WARNING "program %s is using a deprecated SCSI " |
|
"ioctl, please convert it to SG_IO\n", current->comm); |
|
break; |
|
default: |
|
break; |
|
} |
|
|
|
switch (cmd) { |
|
case SG_GET_VERSION_NUM: |
|
return sg_get_version(arg); |
|
case SG_SET_TIMEOUT: |
|
return sg_set_timeout(sdev, arg); |
|
case SG_GET_TIMEOUT: |
|
return jiffies_to_clock_t(sdev->sg_timeout); |
|
case SG_GET_RESERVED_SIZE: |
|
return sg_get_reserved_size(sdev, arg); |
|
case SG_SET_RESERVED_SIZE: |
|
return sg_set_reserved_size(sdev, arg); |
|
case SG_EMULATED_HOST: |
|
return sg_emulated_host(q, arg); |
|
case SG_IO: |
|
return scsi_ioctl_sg_io(sdev, disk, mode, arg); |
|
case SCSI_IOCTL_SEND_COMMAND: |
|
return sg_scsi_ioctl(q, disk, mode, arg); |
|
case CDROM_SEND_PACKET: |
|
return scsi_cdrom_send_packet(sdev, disk, mode, arg); |
|
case CDROMCLOSETRAY: |
|
return scsi_send_start_stop(sdev, 3); |
|
case CDROMEJECT: |
|
return scsi_send_start_stop(sdev, 2); |
|
case SCSI_IOCTL_GET_IDLUN: |
|
return scsi_get_idlun(sdev, arg); |
|
case SCSI_IOCTL_GET_BUS_NUMBER: |
|
return put_user(sdev->host->host_no, (int __user *)arg); |
|
case SCSI_IOCTL_PROBE_HOST: |
|
return ioctl_probe(sdev->host, arg); |
|
case SCSI_IOCTL_DOORLOCK: |
|
return scsi_set_medium_removal(sdev, SCSI_REMOVAL_PREVENT); |
|
case SCSI_IOCTL_DOORUNLOCK: |
|
return scsi_set_medium_removal(sdev, SCSI_REMOVAL_ALLOW); |
|
case SCSI_IOCTL_TEST_UNIT_READY: |
|
return scsi_test_unit_ready(sdev, IOCTL_NORMAL_TIMEOUT, |
|
NORMAL_RETRIES, &sense_hdr); |
|
case SCSI_IOCTL_START_UNIT: |
|
return scsi_send_start_stop(sdev, 1); |
|
case SCSI_IOCTL_STOP_UNIT: |
|
return scsi_send_start_stop(sdev, 0); |
|
case SCSI_IOCTL_GET_PCI: |
|
return scsi_ioctl_get_pci(sdev, arg); |
|
case SG_SCSI_RESET: |
|
return scsi_ioctl_reset(sdev, arg); |
|
} |
|
|
|
#ifdef CONFIG_COMPAT |
|
if (in_compat_syscall()) { |
|
if (!sdev->host->hostt->compat_ioctl) |
|
return -EINVAL; |
|
return sdev->host->hostt->compat_ioctl(sdev, cmd, arg); |
|
} |
|
#endif |
|
if (!sdev->host->hostt->ioctl) |
|
return -EINVAL; |
|
return sdev->host->hostt->ioctl(sdev, cmd, arg); |
|
} |
|
EXPORT_SYMBOL(scsi_ioctl); |
|
|
|
/* |
|
* We can process a reset even when a device isn't fully operable. |
|
*/ |
|
int scsi_ioctl_block_when_processing_errors(struct scsi_device *sdev, int cmd, |
|
bool ndelay) |
|
{ |
|
if (cmd == SG_SCSI_RESET && ndelay) { |
|
if (scsi_host_in_recovery(sdev->host)) |
|
return -EAGAIN; |
|
} else { |
|
if (!scsi_block_when_processing_errors(sdev)) |
|
return -ENODEV; |
|
} |
|
|
|
return 0; |
|
} |
|
EXPORT_SYMBOL_GPL(scsi_ioctl_block_when_processing_errors);
|
|
|