static int sm_release(struct gendisk *disk, fmode_t mode)
{
LogPath();
struct scsi_device* sdev = disk->private_data;
if(scsi_block_when_processing_errors(sdev))
scsi_set_medium_removal(sdev, SCSI_REMOVAL_ALLOW);
else
return -EBUSY;
return 0;
}
/**
* scsi_nonblockable_ioctl() - Handle SG_SCSI_RESET
* @sdev: scsi device receiving ioctl
* @cmd: Must be SC_SCSI_RESET
* @arg: pointer to int containing SG_SCSI_RESET_{DEVICE,BUS,HOST}
* @ndelay: file mode O_NDELAY flag
*/
int scsi_nonblockable_ioctl(struct scsi_device *sdev, int cmd,
void __user *arg, int ndelay)
{
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 (ndelay) {
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_TARGET:
val = SCSI_TRY_RESET_TARGET;
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;
}
/*
* 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 (test_bit(SHOST_RECOVERY,
&sdev->host->shost_state))
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;
}
static int sg_ioctl(struct inode * inode,struct file * file,
unsigned int cmd_in, unsigned long arg)
{
int dev = MINOR(inode->i_rdev);
int result;
if ((dev<0) || (dev>=sg_template.dev_max))
return -ENXIO;
/*
* If we are in the middle of error recovery, then don't allow any
* access to this device. Also, error recovery *may* have taken the
* device offline, in which case all further access is prohibited.
*/
if( !scsi_block_when_processing_errors(scsi_generics[dev].device) )
{
return -ENXIO;
}
switch(cmd_in)
{
case SG_SET_TIMEOUT:
result = verify_area(VERIFY_READ, (const void *)arg, sizeof(int));
if (result) return result;
get_user(scsi_generics[dev].timeout, (int *) arg);
return 0;
case SG_GET_TIMEOUT:
return scsi_generics[dev].timeout;
case SG_EMULATED_HOST:
return put_user(scsi_generics[dev].device->host->hostt->emulated, (int *) arg);
case SCSI_IOCTL_SEND_COMMAND:
/*
Allow SCSI_IOCTL_SEND_COMMAND without checking suser() since the
user already has read/write access to the generic device and so
can execute arbitrary SCSI commands.
*/
return scsi_ioctl_send_command(scsi_generics[dev].device, (void *) arg);
default:
return scsi_ioctl(scsi_generics[dev].device, cmd_in, (void *) arg);
}
}
static int sm_open(struct block_device *pdev, fmode_t mode)
//static int sm_open(struct inode *inode, struct file *filp)
{
LogPath();
int retval = -ENXIO;
#if 1
struct gendisk* disk = pdev->bd_disk;
Log("disk:0x%x",disk);
struct scsi_device* sdev = disk->private_data;
if(!scsi_block_when_processing_errors(sdev))
{
goto error_out;
}
if(!scsi_device_online(sdev))
goto error_out;
#endif
return 0;
error_out:
return retval;
}
int sr_do_ioctl(Scsi_CD *cd, struct packet_command *cgc)
{
struct scsi_device *SDev;
struct scsi_sense_hdr sshdr;
int result, err = 0, retries = 0;
struct request_sense *sense = cgc->sense;
SDev = cd->device;
if (!sense) {
sense = kmalloc(SCSI_SENSE_BUFFERSIZE, GFP_KERNEL);
if (!sense) {
err = -ENOMEM;
goto out;
}
}
retry:
if (!scsi_block_when_processing_errors(SDev)) {
err = -ENODEV;
goto out;
}
memset(sense, 0, sizeof(*sense));
result = scsi_execute(SDev, cgc->cmd, cgc->data_direction,
cgc->buffer, cgc->buflen, (char *)sense,
cgc->timeout, IOCTL_RETRIES, 0, NULL);
scsi_normalize_sense((char *)sense, sizeof(*sense), &sshdr);
/* Minimal error checking. Ignore cases we know about, and report the rest. */
if (driver_byte(result) != 0) {
switch (sshdr.sense_key) {
case UNIT_ATTENTION:
SDev->changed = 1;
if (!cgc->quiet)
sr_printk(KERN_INFO, cd,
"disc change detected.\n");
if (retries++ < 10)
goto retry;
err = -ENOMEDIUM;
break;
case NOT_READY: /* This happens if there is no disc in drive */
if (sshdr.asc == 0x04 &&
sshdr.ascq == 0x01) {
/* sense: Logical unit is in process of becoming ready */
if (!cgc->quiet)
sr_printk(KERN_INFO, cd,
"CDROM not ready yet.\n");
if (retries++ < 10) {
/* sleep 2 sec and try again */
ssleep(2);
goto retry;
} else {
/* 20 secs are enough? */
err = -ENOMEDIUM;
break;
}
}
if (!cgc->quiet)
sr_printk(KERN_INFO, cd,
"CDROM not ready. Make sure there "
"is a disc in the drive.\n");
err = -ENOMEDIUM;
break;
case ILLEGAL_REQUEST:
err = -EIO;
if (sshdr.asc == 0x20 &&
sshdr.ascq == 0x00)
/* sense: Invalid command operation code */
err = -EDRIVE_CANT_DO_THIS;
break;
default:
err = -EIO;
}
}
/* Wake up a process waiting for device */
out:
if (!cgc->sense)
kfree(sense);
cgc->stat = err;
return err;
}
/**
* scsi_ioctl - Dispatch ioctl to scsi device
* @sdev: scsi device receiving ioctl
* @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, int cmd, void __user *arg)
{
char scsi_cmd[MAX_COMMAND_SIZE];
/* No idea how this happens.... */
if (!sdev)
return -ENXIO;
/*
* If we are in the middle of error recovery, don't let anyone
* else try and use this device. Also, if error recovery fails, it
* may try and take the device offline, in which case all further
* access to the device is prohibited.
*/
if (!scsi_block_when_processing_errors(sdev))
return -ENODEV;
/* 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 SCSI_IOCTL_GET_IDLUN:
if (!access_ok(VERIFY_WRITE, arg, sizeof(struct scsi_idlun)))
return -EFAULT;
__put_user((sdev->id & 0xff)
+ ((sdev->lun & 0xff) << 8)
+ ((sdev->channel & 0xff) << 16)
+ ((sdev->host->host_no & 0xff) << 24),
&((struct scsi_idlun __user *)arg)->dev_id);
__put_user(sdev->host->unique_id,
&((struct scsi_idlun __user *)arg)->host_unique_id);
return 0;
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_SEND_COMMAND:
if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
return -EACCES;
return sg_scsi_ioctl(sdev->request_queue, NULL, 0, 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, NULL);
case SCSI_IOCTL_START_UNIT:
scsi_cmd[0] = START_STOP;
scsi_cmd[1] = 0;
scsi_cmd[2] = scsi_cmd[3] = scsi_cmd[5] = 0;
scsi_cmd[4] = 1;
return ioctl_internal_command(sdev, scsi_cmd,
START_STOP_TIMEOUT, NORMAL_RETRIES);
case SCSI_IOCTL_STOP_UNIT:
scsi_cmd[0] = START_STOP;
scsi_cmd[1] = 0;
scsi_cmd[2] = scsi_cmd[3] = scsi_cmd[5] = 0;
scsi_cmd[4] = 0;
return ioctl_internal_command(sdev, scsi_cmd,
START_STOP_TIMEOUT, NORMAL_RETRIES);
case SCSI_IOCTL_GET_PCI:
return scsi_ioctl_get_pci(sdev, arg);
default:
if (sdev->host->hostt->ioctl)
return sdev->host->hostt->ioctl(sdev, cmd, arg);
}
return -EINVAL;
}
/*
* 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 scsi_devices[] element, a structure.
*/
int scsi_ioctl(Scsi_Device * dev, int cmd, void *arg)
{
char scsi_cmd[MAX_COMMAND_SIZE];
char cmd_byte1;
/* No idea how this happens.... */
if (!dev)
return -ENXIO;
/*
* If we are in the middle of error recovery, don't let anyone
* else try and use this device. Also, if error recovery fails, it
* may try and take the device offline, in which case all further
* access to the device is prohibited.
*/
if (!scsi_block_when_processing_errors(dev)) {
return -ENODEV;
}
cmd_byte1 = (dev->scsi_level <= SCSI_2) ? (dev->lun << 5) : 0;
switch (cmd) {
case SCSI_IOCTL_GET_IDLUN:
if (verify_area(VERIFY_WRITE, arg, sizeof(Scsi_Idlun)))
return -EFAULT;
__put_user((dev->id & 0xff)
+ ((dev->lun & 0xff) << 8)
+ ((dev->channel & 0xff) << 16)
+ ((dev->host->host_no & 0xff) << 24),
&((Scsi_Idlun *) arg)->dev_id);
__put_user(dev->host->unique_id, &((Scsi_Idlun *) arg)->host_unique_id);
return 0;
case SCSI_IOCTL_GET_BUS_NUMBER:
return put_user(dev->host->host_no, (int *) arg);
case SCSI_IOCTL_TAGGED_ENABLE:
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
if (!dev->tagged_supported)
return -EINVAL;
dev->tagged_queue = 1;
dev->current_tag = 1;
return 0;
case SCSI_IOCTL_TAGGED_DISABLE:
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
if (!dev->tagged_supported)
return -EINVAL;
dev->tagged_queue = 0;
dev->current_tag = 0;
return 0;
case SCSI_IOCTL_PROBE_HOST:
return ioctl_probe(dev->host, arg);
case SCSI_IOCTL_SEND_COMMAND:
if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
return -EACCES;
return scsi_ioctl_send_command((Scsi_Device *) dev,
(Scsi_Ioctl_Command *) arg);
case SCSI_IOCTL_DOORLOCK:
if (!dev->removable || !dev->lockable)
return 0;
scsi_cmd[0] = ALLOW_MEDIUM_REMOVAL;
scsi_cmd[1] = cmd_byte1;
scsi_cmd[2] = scsi_cmd[3] = scsi_cmd[5] = 0;
scsi_cmd[4] = SCSI_REMOVAL_PREVENT;
return ioctl_internal_command((Scsi_Device *) dev, scsi_cmd,
IOCTL_NORMAL_TIMEOUT, NORMAL_RETRIES);
break;
case SCSI_IOCTL_DOORUNLOCK:
if (!dev->removable || !dev->lockable)
return 0;
scsi_cmd[0] = ALLOW_MEDIUM_REMOVAL;
scsi_cmd[1] = cmd_byte1;
scsi_cmd[2] = scsi_cmd[3] = scsi_cmd[5] = 0;
scsi_cmd[4] = SCSI_REMOVAL_ALLOW;
return ioctl_internal_command((Scsi_Device *) dev, scsi_cmd,
IOCTL_NORMAL_TIMEOUT, NORMAL_RETRIES);
case SCSI_IOCTL_TEST_UNIT_READY:
scsi_cmd[0] = TEST_UNIT_READY;
scsi_cmd[1] = cmd_byte1;
scsi_cmd[2] = scsi_cmd[3] = scsi_cmd[5] = 0;
scsi_cmd[4] = 0;
return ioctl_internal_command((Scsi_Device *) dev, scsi_cmd,
IOCTL_NORMAL_TIMEOUT, NORMAL_RETRIES);
break;
case SCSI_IOCTL_START_UNIT:
scsi_cmd[0] = START_STOP;
scsi_cmd[1] = cmd_byte1;
scsi_cmd[2] = scsi_cmd[3] = scsi_cmd[5] = 0;
scsi_cmd[4] = 1;
return ioctl_internal_command((Scsi_Device *) dev, scsi_cmd,
START_STOP_TIMEOUT, NORMAL_RETRIES);
break;
case SCSI_IOCTL_STOP_UNIT:
scsi_cmd[0] = START_STOP;
scsi_cmd[1] = cmd_byte1;
scsi_cmd[2] = scsi_cmd[3] = scsi_cmd[5] = 0;
scsi_cmd[4] = 0;
return ioctl_internal_command((Scsi_Device *) dev, scsi_cmd,
START_STOP_TIMEOUT, NORMAL_RETRIES);
break;
case SCSI_IOCTL_GET_PCI:
return scsi_ioctl_get_pci(dev, arg);
break;
default:
if (dev->host->hostt->ioctl)
return dev->host->hostt->ioctl(dev, cmd, arg);
return -EINVAL;
}
return -EINVAL;
}
/*
* 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 scsi_devices[] element, a structure.
*/
int scsi_ioctl(struct scsi_device *sdev, int cmd, void __user *arg)
{
char scsi_cmd[MAX_COMMAND_SIZE];
/* No idea how this happens.... */
if (!sdev)
return -ENXIO;
/*
* If we are in the middle of error recovery, don't let anyone
* else try and use this device. Also, if error recovery fails, it
* may try and take the device offline, in which case all further
* access to the device is prohibited.
*/
if (!scsi_block_when_processing_errors(sdev))
return -ENODEV;
switch (cmd) {
case SCSI_IOCTL_GET_IDLUN:
if (verify_area(VERIFY_WRITE, arg, sizeof(struct scsi_idlun)))
return -EFAULT;
__put_user((sdev->id & 0xff)
+ ((sdev->lun & 0xff) << 8)
+ ((sdev->channel & 0xff) << 16)
+ ((sdev->host->host_no & 0xff) << 24),
&((struct scsi_idlun __user *)arg)->dev_id);
__put_user(sdev->host->unique_id,
&((struct scsi_idlun __user *)arg)->host_unique_id);
return 0;
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_SEND_COMMAND:
if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
return -EACCES;
return scsi_ioctl_send_command(sdev, 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:
scsi_cmd[0] = TEST_UNIT_READY;
scsi_cmd[1] = 0;
scsi_cmd[2] = scsi_cmd[3] = scsi_cmd[5] = 0;
scsi_cmd[4] = 0;
return ioctl_internal_command(sdev, scsi_cmd,
IOCTL_NORMAL_TIMEOUT, NORMAL_RETRIES);
case SCSI_IOCTL_START_UNIT:
scsi_cmd[0] = START_STOP;
scsi_cmd[1] = 0;
scsi_cmd[2] = scsi_cmd[3] = scsi_cmd[5] = 0;
scsi_cmd[4] = 1;
return ioctl_internal_command(sdev, scsi_cmd,
START_STOP_TIMEOUT, NORMAL_RETRIES);
case SCSI_IOCTL_STOP_UNIT:
scsi_cmd[0] = START_STOP;
scsi_cmd[1] = 0;
scsi_cmd[2] = scsi_cmd[3] = scsi_cmd[5] = 0;
scsi_cmd[4] = 0;
return ioctl_internal_command(sdev, scsi_cmd,
START_STOP_TIMEOUT, NORMAL_RETRIES);
case SCSI_IOCTL_GET_PCI:
return scsi_ioctl_get_pci(sdev, arg);
default:
if (sdev->host->hostt->ioctl)
return sdev->host->hostt->ioctl(sdev, cmd, arg);
}
return -EINVAL;
}
int scsi_ioctl(struct scsi_device *sdev, int cmd, void __user *arg)
{
char scsi_cmd[MAX_COMMAND_SIZE];
if (!sdev)
return -ENXIO;
if (!scsi_block_when_processing_errors(sdev))
return -ENODEV;
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 SCSI_IOCTL_GET_IDLUN:
if (!access_ok(VERIFY_WRITE, arg, sizeof(struct scsi_idlun)))
return -EFAULT;
__put_user((sdev->id & 0xff)
+ ((sdev->lun & 0xff) << 8)
+ ((sdev->channel & 0xff) << 16)
+ ((sdev->host->host_no & 0xff) << 24),
&((struct scsi_idlun __user *)arg)->dev_id);
__put_user(sdev->host->unique_id,
&((struct scsi_idlun __user *)arg)->host_unique_id);
return 0;
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_SEND_COMMAND:
if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
return -EACCES;
return sg_scsi_ioctl(sdev->request_queue, NULL, 0, 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, NULL);
case SCSI_IOCTL_START_UNIT:
scsi_cmd[0] = START_STOP;
scsi_cmd[1] = 0;
scsi_cmd[2] = scsi_cmd[3] = scsi_cmd[5] = 0;
scsi_cmd[4] = 1;
return ioctl_internal_command(sdev, scsi_cmd,
START_STOP_TIMEOUT, NORMAL_RETRIES);
case SCSI_IOCTL_STOP_UNIT:
scsi_cmd[0] = START_STOP;
scsi_cmd[1] = 0;
scsi_cmd[2] = scsi_cmd[3] = scsi_cmd[5] = 0;
scsi_cmd[4] = 0;
return ioctl_internal_command(sdev, scsi_cmd,
START_STOP_TIMEOUT, NORMAL_RETRIES);
case SCSI_IOCTL_GET_PCI:
return scsi_ioctl_get_pci(sdev, arg);
default:
if (sdev->host->hostt->ioctl)
return sdev->host->hostt->ioctl(sdev, cmd, arg);
}
return -EINVAL;
}
static ssize_t sg_write(struct file *filp, const char *buf,
size_t count, loff_t *ppos)
{
unsigned long flags;
struct inode *inode = filp->f_dentry->d_inode;
int bsize,size,amt,i;
unsigned char cmnd[MAX_COMMAND_SIZE];
kdev_t devt = inode->i_rdev;
int dev = MINOR(devt);
struct scsi_generic * device=&scsi_generics[dev];
int input_size;
unsigned char opcode;
Scsi_Cmnd * SCpnt;
/*
* If we are in the middle of error recovery, don't let anyone
* else try and use this device. Also, if error recovery fails, it
* may try and take the device offline, in which case all further
* access to the device is prohibited.
*/
if( !scsi_block_when_processing_errors(scsi_generics[dev].device) )
{
return -ENXIO;
}
if (ppos != &filp->f_pos) {
/* FIXME: Hmm. Seek to the right place, or fail? */
}
if ((i=verify_area(VERIFY_READ,buf,count)))
return i;
/*
* The minimum scsi command length is 6 bytes. If we get anything
* less than this, it is clearly bogus.
*/
if (count<(sizeof(struct sg_header) + 6))
return -EIO;
/*
* If we still have a result pending from a previous command,
* wait until the result has been read by the user before sending
* another command.
*/
while(device->pending)
{
if (filp->f_flags & O_NONBLOCK)
return -EAGAIN;
#ifdef DEBUG
printk("sg_write: sleeping on pending request\n");
#endif
interruptible_sleep_on(&device->write_wait);
if (signal_pending(current))
return -ERESTARTSYS;
}
/*
* Mark the device flags for the new state.
*/
device->pending=1;
device->complete=0;
copy_from_user(&device->header,buf,sizeof(struct sg_header));
device->header.pack_len=count;
buf+=sizeof(struct sg_header);
/*
* Now we need to grab the command itself from the user's buffer.
*/
get_user(opcode, buf);
size=COMMAND_SIZE(opcode);
if (opcode >= 0xc0 && device->header.twelve_byte) size = 12;
/*
* Determine buffer size.
*/
input_size = device->header.pack_len - size;
if( input_size > device->header.reply_len)
{
bsize = input_size;
} else {
bsize = device->header.reply_len;
}
/*
* Don't include the command header itself in the size.
*/
bsize-=sizeof(struct sg_header);
input_size-=sizeof(struct sg_header);
/*
* Verify that the user has actually passed enough bytes for this command.
*/
if( input_size < 0 )
{
device->pending=0;
wake_up( &device->write_wait );
return -EIO;
}
/*
* Allocate a buffer that is large enough to hold the data
* that has been requested. Round up to an even number of sectors,
* since scsi_malloc allocates in chunks of 512 bytes.
*/
amt=bsize;
if (!bsize)
bsize++;
bsize=(bsize+511) & ~511;
/*
* If we cannot allocate the buffer, report an error.
*/
if ((bsize<0) || !(device->buff=sg_malloc(device->buff_len=bsize)))
{
device->pending=0;
wake_up(&device->write_wait);
return -ENOMEM;
}
#ifdef DEBUG
printk("allocating device\n");
#endif
/*
* Grab a device pointer for the device we want to talk to. If we
* don't want to block, just return with the appropriate message.
*/
if (!(SCpnt=scsi_allocate_device(NULL,device->device, !(filp->f_flags & O_NONBLOCK))))
{
device->pending=0;
wake_up(&device->write_wait);
sg_free(device->buff,device->buff_len);
device->buff = NULL;
return -EAGAIN;
}
#ifdef DEBUG
printk("device allocated\n");
#endif
SCpnt->request.rq_dev = devt;
SCpnt->request.rq_status = RQ_ACTIVE;
SCpnt->sense_buffer[0]=0;
SCpnt->cmd_len = size;
/*
* Now copy the SCSI command from the user's address space.
*/
copy_from_user(cmnd,buf,size);
buf+=size;
/*
* If we are writing data, copy the data we are writing. The pack_len
* field also includes the length of the header and the command,
* so we need to subtract these off.
*/
if (input_size > 0) copy_from_user(device->buff, buf, input_size);
/*
* Set the LUN field in the command structure.
*/
cmnd[1]= (cmnd[1] & 0x1f) | (device->device->lun<<5);
#ifdef DEBUG
printk("do cmd\n");
#endif
/*
* Now pass the actual command down to the low-level driver. We
* do not do any more here - when the interrupt arrives, we will
* then do the post-processing.
*/
spin_lock_irqsave(&io_request_lock, flags);
scsi_do_cmd (SCpnt,(void *) cmnd,
(void *) device->buff,amt,
sg_command_done,device->timeout,SG_DEFAULT_RETRIES);
spin_unlock_irqrestore(&io_request_lock, flags);
#ifdef DEBUG
printk("done cmd\n");
#endif
return count;
}
/*
* Read back the results of a previous command. We use the pending and
* complete semaphores to tell us whether the buffer is available for us
* and whether the command is actually done.
*/
static ssize_t sg_read(struct file *filp, char *buf,
size_t count, loff_t *ppos)
{
struct inode *inode = filp->f_dentry->d_inode;
int dev=MINOR(inode->i_rdev);
int i;
struct scsi_generic *device=&scsi_generics[dev];
/*
* If we are in the middle of error recovery, don't let anyone
* else try and use this device. Also, if error recovery fails, it
* may try and take the device offline, in which case all further
* access to the device is prohibited.
*/
if( !scsi_block_when_processing_errors(scsi_generics[dev].device) )
{
return -ENXIO;
}
if (ppos != &filp->f_pos) {
/* FIXME: Hmm. Seek to the right place, or fail? */
}
if ((i=verify_area(VERIFY_WRITE,buf,count)))
return i;
/*
* Wait until the command is actually done.
*/
while(!device->pending || !device->complete)
{
if (filp->f_flags & O_NONBLOCK)
{
return -EAGAIN;
}
interruptible_sleep_on(&device->read_wait);
if (signal_pending(current))
{
return -ERESTARTSYS;
}
}
/*
* Now copy the result back to the user buffer.
*/
device->header.pack_len=device->header.reply_len;
if (count>=sizeof(struct sg_header))
{
copy_to_user(buf,&device->header,sizeof(struct sg_header));
buf+=sizeof(struct sg_header);
if (count>device->header.pack_len)
count=device->header.pack_len;
if (count > sizeof(struct sg_header)) {
copy_to_user(buf,device->buff,count-sizeof(struct sg_header));
}
}
else
count= device->header.result==0 ? 0 : -EIO;
/*
* Clean up, and release the device so that we can send another
* command.
*/
sg_free(device->buff,device->buff_len);
device->buff = NULL;
device->pending=0;
wake_up(&device->write_wait);
return count;
}
static int sg_open(struct inode * inode, struct file * filp)
{
int dev=MINOR(inode->i_rdev);
int flags=filp->f_flags;
if (dev>=sg_template.dev_max || !scsi_generics[dev].device)
return -ENXIO;
if( !scsi_block_when_processing_errors(scsi_generics[dev].device) )
{
return -ENXIO;
}
if (O_RDWR!=(flags & O_ACCMODE))
return -EACCES;
/*
* If we want exclusive access, then wait until the device is not
* busy, and then set the flag to prevent anyone else from using it.
*/
if (flags & O_EXCL)
{
while(scsi_generics[dev].users)
{
if (flags & O_NONBLOCK)
return -EBUSY;
interruptible_sleep_on(&scsi_generics[dev].generic_wait);
if (signal_pending(current))
return -ERESTARTSYS;
}
scsi_generics[dev].exclude=1;
}
else
/*
* Wait until nobody has an exclusive open on
* this device.
*/
while(scsi_generics[dev].exclude)
{
if (flags & O_NONBLOCK)
return -EBUSY;
interruptible_sleep_on(&scsi_generics[dev].generic_wait);
if (signal_pending(current))
return -ERESTARTSYS;
}
/*
* OK, we should have grabbed the device. Mark the thing so
* that other processes know that we have it, and initialize the
* state variables to known values.
*/
if (!scsi_generics[dev].users
&& scsi_generics[dev].pending
&& scsi_generics[dev].complete)
{
if (scsi_generics[dev].buff != NULL)
sg_free(scsi_generics[dev].buff,scsi_generics[dev].buff_len);
scsi_generics[dev].buff=NULL;
scsi_generics[dev].pending=0;
}
if (!scsi_generics[dev].users)
scsi_generics[dev].timeout=SG_DEFAULT_TIMEOUT;
if (scsi_generics[dev].device->host->hostt->module)
__MOD_INC_USE_COUNT(scsi_generics[dev].device->host->hostt->module);
if (sg_template.module)
__MOD_INC_USE_COUNT(sg_template.module);
scsi_generics[dev].users++;
return 0;
}
int sr_do_ioctl(Scsi_CD *cd, struct packet_command *cgc)
{
struct scsi_request *SRpnt;
struct scsi_device *SDev;
struct request *req;
int result, err = 0, retries = 0;
SDev = cd->device;
SRpnt = scsi_allocate_request(SDev, GFP_KERNEL);
if (!SRpnt) {
printk(KERN_ERR "Unable to allocate SCSI request in sr_do_ioctl");
err = -ENOMEM;
goto out;
}
SRpnt->sr_data_direction = cgc->data_direction;
retry:
if (!scsi_block_when_processing_errors(SDev)) {
err = -ENODEV;
goto out_free;
}
scsi_wait_req(SRpnt, cgc->cmd, cgc->buffer, cgc->buflen,
cgc->timeout, IOCTL_RETRIES);
req = SRpnt->sr_request;
if (SRpnt->sr_buffer && req->buffer && SRpnt->sr_buffer != req->buffer) {
memcpy(req->buffer, SRpnt->sr_buffer, SRpnt->sr_bufflen);
kfree(SRpnt->sr_buffer);
SRpnt->sr_buffer = req->buffer;
}
result = SRpnt->sr_result;
/* Minimal error checking. Ignore cases we know about, and report the rest. */
if (driver_byte(result) != 0) {
switch (SRpnt->sr_sense_buffer[2] & 0xf) {
case UNIT_ATTENTION:
SDev->changed = 1;
if (!cgc->quiet)
printk(KERN_INFO "%s: disc change detected.\n", cd->cdi.name);
if (retries++ < 10)
goto retry;
err = -ENOMEDIUM;
break;
case NOT_READY: /* This happens if there is no disc in drive */
if (SRpnt->sr_sense_buffer[12] == 0x04 &&
SRpnt->sr_sense_buffer[13] == 0x01) {
/* sense: Logical unit is in process of becoming ready */
if (!cgc->quiet)
printk(KERN_INFO "%s: CDROM not ready yet.\n", cd->cdi.name);
if (retries++ < 10) {
/* sleep 2 sec and try again */
ssleep(2);
goto retry;
} else {
/* 20 secs are enough? */
err = -ENOMEDIUM;
break;
}
}
if (!cgc->quiet)
printk(KERN_INFO "%s: CDROM not ready. Make sure there is a disc in the drive.\n", cd->cdi.name);
#ifdef DEBUG
scsi_print_req_sense("sr", SRpnt);
#endif
err = -ENOMEDIUM;
break;
case ILLEGAL_REQUEST:
err = -EIO;
if (SRpnt->sr_sense_buffer[12] == 0x20 &&
SRpnt->sr_sense_buffer[13] == 0x00)
/* sense: Invalid command operation code */
err = -EDRIVE_CANT_DO_THIS;
#ifdef DEBUG
__scsi_print_command(cgc->cmd);
scsi_print_req_sense("sr", SRpnt);
#endif
break;
default:
printk(KERN_ERR "%s: CDROM (ioctl) error, command: ", cd->cdi.name);
__scsi_print_command(cgc->cmd);
scsi_print_req_sense("sr", SRpnt);
err = -EIO;
}
}
if (cgc->sense)
memcpy(cgc->sense, SRpnt->sr_sense_buffer, sizeof(*cgc->sense));
/* Wake up a process waiting for device */
out_free:
scsi_release_request(SRpnt);
SRpnt = NULL;
out:
cgc->stat = err;
return err;
}
static int sd_ioctl(struct inode * inode, struct file * file, unsigned int cmd, unsigned long arg)
{
kdev_t dev = inode->i_rdev;
struct Scsi_Host * host;
Scsi_Device * SDev;
int diskinfo[4];
SDev = rscsi_disks[DEVICE_NR(dev)].device;
if (!SDev)
return -ENODEV;
/*
* If we are in the middle of error recovery, don't let anyone
* else try and use this device. Also, if error recovery fails, it
* may try and take the device offline, in which case all further
* access to the device is prohibited.
*/
if( !scsi_block_when_processing_errors(SDev) )
{
return -ENODEV;
}
switch (cmd)
{
case HDIO_GETGEO: /* Return BIOS disk parameters */
{
struct hd_geometry *loc = (struct hd_geometry *) arg;
if(!loc)
return -EINVAL;
host = rscsi_disks[DEVICE_NR(dev)].device->host;
/* default to most commonly used values */
diskinfo[0] = 0x40;
diskinfo[1] = 0x20;
diskinfo[2] = rscsi_disks[DEVICE_NR(dev)].capacity >> 11;
/* override with calculated, extended default, or driver values */
if(host->hostt->bios_param != NULL)
host->hostt->bios_param(&rscsi_disks[DEVICE_NR(dev)],
dev,
&diskinfo[0]);
else scsicam_bios_param(&rscsi_disks[DEVICE_NR(dev)],
dev, &diskinfo[0]);
if (put_user(diskinfo[0], &loc->heads) ||
put_user(diskinfo[1], &loc->sectors) ||
put_user(diskinfo[2], &loc->cylinders) ||
put_user(sd_gendisks[SD_MAJOR_IDX(
inode->i_rdev)].part[MINOR(
inode->i_rdev)].start_sect, &loc->start))
return -EFAULT;
return 0;
}
case HDIO_GETGEO_BIG:
{
struct hd_big_geometry *loc = (struct hd_big_geometry *) arg;
if(!loc)
return -EINVAL;
host = rscsi_disks[DEVICE_NR(dev)].device->host;
/* default to most commonly used values */
diskinfo[0] = 0x40;
diskinfo[1] = 0x20;
diskinfo[2] = rscsi_disks[DEVICE_NR(dev)].capacity >> 11;
/* override with calculated, extended default, or driver values */
if(host->hostt->bios_param != NULL)
host->hostt->bios_param(&rscsi_disks[DEVICE_NR(dev)],
dev,
&diskinfo[0]);
else scsicam_bios_param(&rscsi_disks[DEVICE_NR(dev)],
dev, &diskinfo[0]);
if (put_user(diskinfo[0], &loc->heads) ||
put_user(diskinfo[1], &loc->sectors) ||
put_user(diskinfo[2], (unsigned int *) &loc->cylinders) ||
put_user(sd_gendisks[SD_MAJOR_IDX(
inode->i_rdev)].part[MINOR(
inode->i_rdev)].start_sect, &loc->start))
return -EFAULT;
return 0;
}
case BLKGETSIZE:
case BLKGETSIZE64:
case BLKROSET:
case BLKROGET:
case BLKRASET:
case BLKRAGET:
case BLKFLSBUF:
case BLKSSZGET:
case BLKPG:
case BLKELVGET:
case BLKELVSET:
case BLKBSZGET:
case BLKBSZSET:
return blk_ioctl(inode->i_rdev, cmd, arg);
case BLKRRPART: /* Re-read partition tables */
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
return revalidate_scsidisk(dev, 1);
default:
return scsi_ioctl(rscsi_disks[DEVICE_NR(dev)].device , cmd, (void *) arg);
}
}
