#include <scsi/scsi_host.h>
#include <scsi/scsi_ioctl.h>
#include <scsi/scsi_request.h>
+#include <scsi/sg.h>
+#include <scsi/scsi_dbg.h>
#include "scsi_logging.h"
#define NORMAL_RETRIES 5
#define IOCTL_NORMAL_TIMEOUT (10 * HZ)
-#define FORMAT_UNIT_TIMEOUT (2 * 60 * 60 * HZ)
-#define START_STOP_TIMEOUT (60 * HZ)
-#define MOVE_MEDIUM_TIMEOUT (5 * 60 * HZ)
-#define READ_ELEMENT_STATUS_TIMEOUT (5 * 60 * HZ)
-#define READ_DEFECT_DATA_TIMEOUT (60 * HZ ) /* ZIP-250 on parallel port takes as long! */
#define MAX_BUF PAGE_SIZE
-/*
- * If we are told to probe a host, we will return 0 if the host is not
- * present, 1 if the host is present, and will return an identifying
- * string at *arg, if arg is non null, filling to the length stored at
- * (int *) arg
+/**
+ * ioctl_probe -- return host identification
+ * @host: host to identify
+ * @buffer: userspace buffer for identification
+ *
+ * Return an identifying string at @buffer, if @buffer is non-NULL, filling
+ * to the length stored at * (int *) @buffer.
*/
-
static int ioctl_probe(struct Scsi_Host *host, void __user *buffer)
{
unsigned int len, slen;
const char *string;
- int temp = host->hostt->present;
- if (temp && buffer) {
+ if (buffer) {
if (get_user(len, (unsigned int __user *) buffer))
return -EFAULT;
return -EFAULT;
}
}
- return temp;
+ return 1;
}
/*
static int ioctl_internal_command(struct scsi_device *sdev, char *cmd,
int timeout, int retries)
{
- struct scsi_request *sreq;
int result;
+ struct scsi_sense_hdr sshdr;
SCSI_LOG_IOCTL(1, printk("Trying ioctl with scsi command %d\n", *cmd));
- sreq = scsi_allocate_request(sdev, GFP_KERNEL);
- if (!sreq) {
- printk("SCSI internal ioctl failed, no memory\n");
- return -ENOMEM;
- }
-
- sreq->sr_data_direction = DMA_NONE;
- scsi_wait_req(sreq, cmd, NULL, 0, timeout, retries);
+ result = scsi_execute_req(sdev, cmd, DMA_NONE, NULL, 0,
+ &sshdr, timeout, retries);
- SCSI_LOG_IOCTL(2, printk("Ioctl returned 0x%x\n", sreq->sr_result));
+ SCSI_LOG_IOCTL(2, printk("Ioctl returned 0x%x\n", result));
- if (driver_byte(sreq->sr_result)) {
- switch (sreq->sr_sense_buffer[2] & 0xf) {
+ if ((driver_byte(result) & DRIVER_SENSE) &&
+ (scsi_sense_valid(&sshdr))) {
+ switch (sshdr.sense_key) {
case ILLEGAL_REQUEST:
if (cmd[0] == ALLOW_MEDIUM_REMOVAL)
sdev->lockable = 0;
else
- printk("SCSI device (ioctl) reports ILLEGAL REQUEST.\n");
+ printk(KERN_INFO "ioctl_internal_command: "
+ "ILLEGAL REQUEST asc=0x%x ascq=0x%x\n",
+ sshdr.asc, sshdr.ascq);
break;
case NOT_READY: /* This happens if there is no disc in drive */
if (sdev->removable && (cmd[0] != TEST_UNIT_READY)) {
- printk(KERN_INFO "Device not ready. Make sure there is a disc in the drive.\n");
+ printk(KERN_INFO "Device not ready. Make sure"
+ " there is a disc in the drive.\n");
break;
}
case UNIT_ATTENTION:
if (sdev->removable) {
sdev->changed = 1;
- sreq->sr_result = 0; /* This is no longer considered an error */
+ result = 0; /* This is no longer considered an error */
break;
}
default: /* Fall through for non-removable media */
- printk("SCSI error: host %d id %d lun %d return code = %x\n",
- sdev->host->host_no,
- sdev->id,
- sdev->lun,
- sreq->sr_result);
- printk("\tSense class %x, sense error %x, extended sense %x\n",
- sense_class(sreq->sr_sense_buffer[0]),
- sense_error(sreq->sr_sense_buffer[0]),
- sreq->sr_sense_buffer[2] & 0xf);
-
+ sdev_printk(KERN_INFO, sdev,
+ "ioctl_internal_command return code = %x\n",
+ result);
+ scsi_print_sense_hdr(" ", &sshdr);
+ break;
}
}
- result = sreq->sr_result;
SCSI_LOG_IOCTL(2, printk("IOCTL Releasing command\n"));
- scsi_release_request(sreq);
return result;
}
sdev->locked = (state == SCSI_REMOVAL_PREVENT);
return ret;
}
-
-/*
- * This interface is deprecated - users should use the scsi generic (sg)
- * interface instead, as this is a more flexible approach to performing
- * generic SCSI commands on a device.
- *
- * The structure that we are passed should look like:
- *
- * struct sdata {
- * unsigned int inlen; [i] Length of data to be written to device
- * unsigned int outlen; [i] Length of data to be read from device
- * unsigned char cmd[x]; [i] SCSI command (6 <= x <= 12).
- * [o] Data read from device starts here.
- * [o] On error, sense buffer starts here.
- * unsigned char wdata[y]; [i] Data written to device starts here.
- * };
- * Notes:
- * - 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 (4K on i386, 8K on alpha).
- * - 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.
- * See the drivers/scsi/scsi.h file for more information on this.
- *
- */
-#define OMAX_SB_LEN 16 /* Old sense buffer length */
-
-int scsi_ioctl_send_command(struct scsi_device *sdev,
- struct scsi_ioctl_command __user *sic)
-{
- char *buf;
- unsigned char cmd[MAX_COMMAND_SIZE];
- char __user *cmd_in;
- struct scsi_request *sreq;
- unsigned char opcode;
- unsigned int inlen, outlen, cmdlen;
- unsigned int needed, buf_needed;
- int timeout, retries, result;
- int data_direction, gfp_mask = GFP_KERNEL;
-
- if (!sic)
- return -EINVAL;
-
- if (sdev->host->unchecked_isa_dma)
- gfp_mask |= GFP_DMA;
-
- /*
- * Verify that we can read at least this much.
- */
- if (verify_area(VERIFY_READ, sic, sizeof(Scsi_Ioctl_Command)))
- return -EFAULT;
-
- if(__get_user(inlen, &sic->inlen))
- return -EFAULT;
-
- if(__get_user(outlen, &sic->outlen))
- return -EFAULT;
-
- /*
- * We do not transfer more than MAX_BUF with this interface.
- * If the user needs to transfer more data than this, they
- * should use scsi_generics (sg) instead.
- */
- if (inlen > MAX_BUF)
- return -EINVAL;
- if (outlen > MAX_BUF)
- return -EINVAL;
-
- cmd_in = sic->data;
- if(get_user(opcode, cmd_in))
- return -EFAULT;
-
- needed = buf_needed = (inlen > outlen ? inlen : outlen);
- if (buf_needed) {
- buf_needed = (buf_needed + 511) & ~511;
- if (buf_needed > MAX_BUF)
- buf_needed = MAX_BUF;
- buf = kmalloc(buf_needed, gfp_mask);
- if (!buf)
- return -ENOMEM;
- memset(buf, 0, buf_needed);
- if (inlen == 0) {
- data_direction = DMA_FROM_DEVICE;
- } else if (outlen == 0 ) {
- data_direction = DMA_TO_DEVICE;
- } else {
- /*
- * Can this ever happen?
- */
- data_direction = DMA_BIDIRECTIONAL;
- }
-
- } else {
- buf = NULL;
- data_direction = DMA_NONE;
- }
-
- /*
- * Obtain the command from the user's address space.
- */
- cmdlen = COMMAND_SIZE(opcode);
-
- result = -EFAULT;
-
- if (verify_area(VERIFY_READ, cmd_in, cmdlen + inlen))
- goto error;
-
- if(__copy_from_user(cmd, cmd_in, cmdlen))
- goto error;
-
- /*
- * Obtain the data to be sent to the device (if any).
- */
-
- if(copy_from_user(buf, cmd_in + cmdlen, inlen))
- goto error;
-
- switch (opcode) {
- case SEND_DIAGNOSTIC:
- case FORMAT_UNIT:
- timeout = FORMAT_UNIT_TIMEOUT;
- retries = 1;
- break;
- case START_STOP:
- timeout = START_STOP_TIMEOUT;
- retries = NORMAL_RETRIES;
- break;
- case MOVE_MEDIUM:
- timeout = MOVE_MEDIUM_TIMEOUT;
- retries = NORMAL_RETRIES;
- break;
- case READ_ELEMENT_STATUS:
- timeout = READ_ELEMENT_STATUS_TIMEOUT;
- retries = NORMAL_RETRIES;
- break;
- case READ_DEFECT_DATA:
- timeout = READ_DEFECT_DATA_TIMEOUT;
- retries = 1;
- break;
- default:
- timeout = IOCTL_NORMAL_TIMEOUT;
- retries = NORMAL_RETRIES;
- break;
- }
-
- sreq = scsi_allocate_request(sdev, GFP_KERNEL);
- if (!sreq) {
- result = -EINTR;
- goto error;
- }
-
- sreq->sr_data_direction = data_direction;
- scsi_wait_req(sreq, cmd, buf, needed, timeout, retries);
-
- /*
- * If there was an error condition, pass the info back to the user.
- */
- result = sreq->sr_result;
- if (result) {
- int sb_len = sizeof(sreq->sr_sense_buffer);
-
- sb_len = (sb_len > OMAX_SB_LEN) ? OMAX_SB_LEN : sb_len;
- if (copy_to_user(cmd_in, sreq->sr_sense_buffer, sb_len))
- result = -EFAULT;
- } else {
- if (copy_to_user(cmd_in, buf, outlen))
- result = -EFAULT;
- }
-
- scsi_release_request(sreq);
-error:
- kfree(buf);
- return result;
-}
+EXPORT_SYMBOL(scsi_set_medium_removal);
/*
* The scsi_ioctl_get_pci() function places into arg the value
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);
+ 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 SCSI_IOCTL_GET_IDLUN:
- if (verify_area(VERIFY_WRITE, arg, sizeof(struct scsi_idlun)))
+ if (!access_ok(VERIFY_WRITE, arg, sizeof(struct scsi_idlun)))
return -EFAULT;
__put_user((sdev->id & 0xff)
case SCSI_IOCTL_SEND_COMMAND:
if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
return -EACCES;
- return scsi_ioctl_send_command(sdev, arg);
+ return sg_scsi_ioctl(NULL, sdev->request_queue, NULL, arg);
case SCSI_IOCTL_DOORLOCK:
return scsi_set_medium_removal(sdev, SCSI_REMOVAL_PREVENT);
case SCSI_IOCTL_DOORUNLOCK:
}
return -EINVAL;
}
+EXPORT_SYMBOL(scsi_ioctl);
+
+/*
+ * the scsi_nonblock_ioctl() function is designed for ioctls which may
+ * be executed even if the device is in recovery.
+ */
+int scsi_nonblockable_ioctl(struct scsi_device *sdev, int cmd,
+ void __user *arg, struct file *filp)
+{
+ int val, result;
+
+ /* The first set of iocts may be executed even if we're doing
+ * error processing, as long as the device was opened
+ * non-blocking */
+ if (filp && filp->f_flags & O_NONBLOCK) {
+ if (scsi_host_in_recovery(sdev->host))
+ return -ENODEV;
+ } else if (!scsi_block_when_processing_errors(sdev))
+ return -ENODEV;
+
+ switch (cmd) {
+ case SG_SCSI_RESET:
+ result = get_user(val, (int __user *)arg);
+ if (result)
+ return result;
+ if (val == SG_SCSI_RESET_NOTHING)
+ return 0;
+ switch (val) {
+ case SG_SCSI_RESET_DEVICE:
+ val = SCSI_TRY_RESET_DEVICE;
+ break;
+ case SG_SCSI_RESET_BUS:
+ val = SCSI_TRY_RESET_BUS;
+ break;
+ case SG_SCSI_RESET_HOST:
+ val = SCSI_TRY_RESET_HOST;
+ break;
+ default:
+ return -EINVAL;
+ }
+ if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
+ return -EACCES;
+ return (scsi_reset_provider(sdev, val) ==
+ SUCCESS) ? 0 : -EIO;
+ }
+ return -ENODEV;
+}
+EXPORT_SYMBOL(scsi_nonblockable_ioctl);
git://git.onelab.eu / linux-2.6.git / blobdiff