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ide: move ioctls handling to ide-ioctls.c
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* Move ioctls handling to ide-ioctls.c
  (except HDIO_DRIVE_TASKFILE for now).

* Make ide_{cmd,task}() static.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
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@bzolnier
bzolnier committed Oct 10, 2008
1 parent 170dc5b commit 05236ea
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Showing 5 changed files with 291 additions and 287 deletions.
4 changes: 2 additions & 2 deletions drivers/ide/Makefile
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EXTRA_CFLAGS += -Idrivers/ide

ide-core-y += ide.o ide-io.o ide-iops.o ide-lib.o ide-probe.o ide-taskfile.o \
ide-pio-blacklist.o
ide-core-y += ide.o ide-ioctls.o ide-io.o ide-iops.o ide-lib.o ide-probe.o \
ide-taskfile.o ide-pio-blacklist.o

# core IDE code
ide-core-$(CONFIG_IDE_TIMINGS) += ide-timings.o
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289 changes: 289 additions & 0 deletions drivers/ide/ide-ioctls.c
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/*
* IDE ioctls handling.
*/

#include <linux/hdreg.h>
#include <linux/ide.h>

static const struct ide_ioctl_devset ide_ioctl_settings[] = {
{ HDIO_GET_32BIT, HDIO_SET_32BIT, get_io_32bit, set_io_32bit },
{ HDIO_GET_KEEPSETTINGS, HDIO_SET_KEEPSETTINGS, get_ksettings, set_ksettings },
{ HDIO_GET_UNMASKINTR, HDIO_SET_UNMASKINTR, get_unmaskirq, set_unmaskirq },
{ HDIO_GET_DMA, HDIO_SET_DMA, get_using_dma, set_using_dma },
{ -1, HDIO_SET_PIO_MODE, NULL, set_pio_mode },
{ 0 }
};

int ide_setting_ioctl(ide_drive_t *drive, struct block_device *bdev,
unsigned int cmd, unsigned long arg,
const struct ide_ioctl_devset *s)
{
unsigned long flags;
int err = -EOPNOTSUPP;

for (; s->get_ioctl; s++) {
if (s->get && s->get_ioctl == cmd)
goto read_val;
else if (s->set && s->set_ioctl == cmd)
goto set_val;
}

return err;

read_val:
mutex_lock(&ide_setting_mtx);
spin_lock_irqsave(&ide_lock, flags);
err = s->get(drive);
spin_unlock_irqrestore(&ide_lock, flags);
mutex_unlock(&ide_setting_mtx);
return err >= 0 ? put_user(err, (long __user *)arg) : err;

set_val:
if (bdev != bdev->bd_contains)
err = -EINVAL;
else {
if (!capable(CAP_SYS_ADMIN))
err = -EACCES;
else {
mutex_lock(&ide_setting_mtx);
err = s->set(drive, arg);
mutex_unlock(&ide_setting_mtx);
}
}
return err;
}
EXPORT_SYMBOL_GPL(ide_setting_ioctl);

static int ide_get_identity_ioctl(ide_drive_t *drive, unsigned int cmd,
unsigned long arg)
{
u16 *id = NULL;
int size = (cmd == HDIO_GET_IDENTITY) ? (ATA_ID_WORDS * 2) : 142;
int rc = 0;

if (drive->id_read == 0) {
rc = -ENOMSG;
goto out;
}

id = kmalloc(size, GFP_KERNEL);
if (id == NULL) {
rc = -ENOMEM;
goto out;
}

memcpy(id, drive->id, size);
ata_id_to_hd_driveid(id);

if (copy_to_user((void __user *)arg, id, size))
rc = -EFAULT;

kfree(id);
out:
return rc;
}

static int ide_get_nice_ioctl(ide_drive_t *drive, unsigned long arg)
{
return put_user((drive->dsc_overlap << IDE_NICE_DSC_OVERLAP) |
(drive->nice1 << IDE_NICE_1), (long __user *)arg);
}

static int ide_set_nice_ioctl(ide_drive_t *drive, unsigned long arg)
{
if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
return -EPERM;

if (((arg >> IDE_NICE_DSC_OVERLAP) & 1) &&
(drive->media == ide_disk || drive->media == ide_floppy ||
drive->scsi))
return -EPERM;

drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
drive->nice1 = (arg >> IDE_NICE_1) & 1;

return 0;
}

static int ide_cmd_ioctl(ide_drive_t *drive, unsigned cmd, unsigned long arg)
{
u8 *buf = NULL;
int bufsize = 0, err = 0;
u8 args[4], xfer_rate = 0;
ide_task_t tfargs;
struct ide_taskfile *tf = &tfargs.tf;
u16 *id = drive->id;

if (NULL == (void *) arg) {
struct request *rq;

rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
err = blk_execute_rq(drive->queue, NULL, rq, 0);
blk_put_request(rq);

return err;
}

if (copy_from_user(args, (void __user *)arg, 4))
return -EFAULT;

memset(&tfargs, 0, sizeof(ide_task_t));
tf->feature = args[2];
if (args[0] == ATA_CMD_SMART) {
tf->nsect = args[3];
tf->lbal = args[1];
tf->lbam = 0x4f;
tf->lbah = 0xc2;
tfargs.tf_flags = IDE_TFLAG_OUT_TF | IDE_TFLAG_IN_NSECT;
} else {
tf->nsect = args[1];
tfargs.tf_flags = IDE_TFLAG_OUT_FEATURE |
IDE_TFLAG_OUT_NSECT | IDE_TFLAG_IN_NSECT;
}
tf->command = args[0];
tfargs.data_phase = args[3] ? TASKFILE_IN : TASKFILE_NO_DATA;

if (args[3]) {
tfargs.tf_flags |= IDE_TFLAG_IO_16BIT;
bufsize = SECTOR_SIZE * args[3];
buf = kzalloc(bufsize, GFP_KERNEL);
if (buf == NULL)
return -ENOMEM;
}

if (tf->command == ATA_CMD_SET_FEATURES &&
tf->feature == SETFEATURES_XFER &&
tf->nsect >= XFER_SW_DMA_0 &&
(id[ATA_ID_UDMA_MODES] ||
id[ATA_ID_MWDMA_MODES] ||
id[ATA_ID_SWDMA_MODES])) {
xfer_rate = args[1];
if (tf->nsect > XFER_UDMA_2 && !eighty_ninty_three(drive)) {
printk(KERN_WARNING "%s: UDMA speeds >UDMA33 cannot "
"be set\n", drive->name);
goto abort;
}
}

err = ide_raw_taskfile(drive, &tfargs, buf, args[3]);

args[0] = tf->status;
args[1] = tf->error;
args[2] = tf->nsect;

if (!err && xfer_rate) {
/* active-retuning-calls future */
ide_set_xfer_rate(drive, xfer_rate);
ide_driveid_update(drive);
}
abort:
if (copy_to_user((void __user *)arg, &args, 4))
err = -EFAULT;
if (buf) {
if (copy_to_user((void __user *)(arg + 4), buf, bufsize))
err = -EFAULT;
kfree(buf);
}
return err;
}

static int ide_task_ioctl(ide_drive_t *drive, unsigned cmd, unsigned long arg)
{
void __user *p = (void __user *)arg;
int err = 0;
u8 args[7];
ide_task_t task;

if (copy_from_user(args, p, 7))
return -EFAULT;

memset(&task, 0, sizeof(task));
memcpy(&task.tf_array[7], &args[1], 6);
task.tf.command = args[0];
task.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;

err = ide_no_data_taskfile(drive, &task);

args[0] = task.tf.command;
memcpy(&args[1], &task.tf_array[7], 6);

if (copy_to_user(p, args, 7))
err = -EFAULT;

return err;
}

static int generic_drive_reset(ide_drive_t *drive)
{
struct request *rq;
int ret = 0;

rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
rq->cmd_type = REQ_TYPE_SPECIAL;
rq->cmd_len = 1;
rq->cmd[0] = REQ_DRIVE_RESET;
rq->cmd_flags |= REQ_SOFTBARRIER;
if (blk_execute_rq(drive->queue, NULL, rq, 1))
ret = rq->errors;
blk_put_request(rq);
return ret;
}

int generic_ide_ioctl(ide_drive_t *drive, struct file *file,
struct block_device *bdev,
unsigned int cmd, unsigned long arg)
{
int err;

err = ide_setting_ioctl(drive, bdev, cmd, arg, ide_ioctl_settings);
if (err != -EOPNOTSUPP)
return err;

switch (cmd) {
case HDIO_OBSOLETE_IDENTITY:
case HDIO_GET_IDENTITY:
if (bdev != bdev->bd_contains)
return -EINVAL;
return ide_get_identity_ioctl(drive, cmd, arg);
case HDIO_GET_NICE:
return ide_get_nice_ioctl(drive, arg);
case HDIO_SET_NICE:
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
return ide_set_nice_ioctl(drive, arg);
#ifdef CONFIG_IDE_TASK_IOCTL
case HDIO_DRIVE_TASKFILE:
if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
return -EACCES;
if (drive->media == ide_disk)
return ide_taskfile_ioctl(drive, cmd, arg);
return -ENOMSG;
#endif
case HDIO_DRIVE_CMD:
if (!capable(CAP_SYS_RAWIO))
return -EACCES;
return ide_cmd_ioctl(drive, cmd, arg);
case HDIO_DRIVE_TASK:
if (!capable(CAP_SYS_RAWIO))
return -EACCES;
return ide_task_ioctl(drive, cmd, arg);
case HDIO_DRIVE_RESET:
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
return generic_drive_reset(drive);
case HDIO_GET_BUSSTATE:
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
if (put_user(BUSSTATE_ON, (long __user *)arg))
return -EFAULT;
return 0;
case HDIO_SET_BUSSTATE:
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
return -EOPNOTSUPP;
default:
return -EINVAL;
}
}
EXPORT_SYMBOL(generic_ide_ioctl);
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