Initial import

1 files changed, 289 insertions, 0 deletions

diff --git a/drivers/ide/ide-ioctls.c b/drivers/ide/ide-ioctls.c
new file mode 100644
index 000000000..6233fa2cb
--- /dev/null
+++ b/drivers/ide/ide-ioctls.c
@@ -0,0 +1,289 @@
+/*
+ * IDE ioctls handling.
+ */
+
+#include <linux/export.h>
+#include <linux/hdreg.h>
+#include <linux/ide.h>
+#include <linux/slab.h>
+
+static const struct ide_ioctl_devset ide_ioctl_settings[] = {
+{ HDIO_GET_32BIT,	 HDIO_SET_32BIT,	&ide_devset_io_32bit  },
+{ HDIO_GET_KEEPSETTINGS, HDIO_SET_KEEPSETTINGS,	&ide_devset_keepsettings },
+{ HDIO_GET_UNMASKINTR,	 HDIO_SET_UNMASKINTR,	&ide_devset_unmaskirq },
+{ HDIO_GET_DMA,		 HDIO_SET_DMA,		&ide_devset_using_dma },
+{ -1,			 HDIO_SET_PIO_MODE,	&ide_devset_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)
+{
+	const struct ide_devset *ds;
+	int err = -EOPNOTSUPP;
+
+	for (; (ds = s->setting); s++) {
+		if (ds->get && s->get_ioctl == cmd)
+			goto read_val;
+		else if (ds->set && s->set_ioctl == cmd)
+			goto set_val;
+	}
+
+	return err;
+
+read_val:
+	mutex_lock(&ide_setting_mtx);
+	err = ds->get(drive);
+	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 = ide_devset_execute(drive, ds, 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->dev_flags & IDE_DFLAG_ID_READ) == 0) {
+		rc = -ENOMSG;
+		goto out;
+	}
+
+	/* ata_id_to_hd_driveid() relies on 'id' to be fully allocated. */
+	id = kmalloc(ATA_ID_WORDS * 2, 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->dev_flags & IDE_DFLAG_DSC_OVERLAP)
+			 << IDE_NICE_DSC_OVERLAP) |
+			(!!(drive->dev_flags & IDE_DFLAG_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_tape))
+		return -EPERM;
+
+	if ((arg >> IDE_NICE_DSC_OVERLAP) & 1)
+		drive->dev_flags |= IDE_DFLAG_DSC_OVERLAP;
+	else
+		drive->dev_flags &= ~IDE_DFLAG_DSC_OVERLAP;
+
+	if ((arg >> IDE_NICE_1) & 1)
+		drive->dev_flags |= IDE_DFLAG_NICE1;
+	else
+		drive->dev_flags &= ~IDE_DFLAG_NICE1;
+
+	return 0;
+}
+
+static int ide_cmd_ioctl(ide_drive_t *drive, unsigned long arg)
+{
+	u8 *buf = NULL;
+	int bufsize = 0, err = 0;
+	u8 args[4], xfer_rate = 0;
+	struct ide_cmd cmd;
+	struct ide_taskfile *tf = &cmd.tf;
+
+	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(&cmd, 0, sizeof(cmd));
+	tf->feature = args[2];
+	if (args[0] == ATA_CMD_SMART) {
+		tf->nsect = args[3];
+		tf->lbal  = args[1];
+		tf->lbam  = ATA_SMART_LBAM_PASS;
+		tf->lbah  = ATA_SMART_LBAH_PASS;
+		cmd.valid.out.tf = IDE_VALID_OUT_TF;
+		cmd.valid.in.tf  = IDE_VALID_NSECT;
+	} else {
+		tf->nsect = args[1];
+		cmd.valid.out.tf = IDE_VALID_FEATURE | IDE_VALID_NSECT;
+		cmd.valid.in.tf  = IDE_VALID_NSECT;
+	}
+	tf->command = args[0];
+	cmd.protocol = args[3] ? ATA_PROT_PIO : ATA_PROT_NODATA;
+
+	if (args[3]) {
+		cmd.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) {
+		xfer_rate = ide_find_dma_mode(drive, tf->nsect);
+		if (xfer_rate != tf->nsect) {
+			err = -EINVAL;
+			goto abort;
+		}
+
+		cmd.tf_flags |= IDE_TFLAG_SET_XFER;
+	}
+
+	err = ide_raw_taskfile(drive, &cmd, buf, args[3]);
+
+	args[0] = tf->status;
+	args[1] = tf->error;
+	args[2] = tf->nsect;
+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 long arg)
+{
+	void __user *p = (void __user *)arg;
+	int err = 0;
+	u8 args[7];
+	struct ide_cmd cmd;
+
+	if (copy_from_user(args, p, 7))
+		return -EFAULT;
+
+	memset(&cmd, 0, sizeof(cmd));
+	memcpy(&cmd.tf.feature, &args[1], 6);
+	cmd.tf.command = args[0];
+	cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
+	cmd.valid.in.tf  = IDE_VALID_IN_TF  | IDE_VALID_DEVICE;
+
+	err = ide_no_data_taskfile(drive, &cmd);
+
+	args[0] = cmd.tf.command;
+	memcpy(&args[1], &cmd.tf.feature, 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;
+	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 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, arg);
+		return -ENOMSG;
+#endif
+	case HDIO_DRIVE_CMD:
+		if (!capable(CAP_SYS_RAWIO))
+			return -EACCES;
+		return ide_cmd_ioctl(drive, arg);
+	case HDIO_DRIVE_TASK:
+		if (!capable(CAP_SYS_RAWIO))
+			return -EACCES;
+		return ide_task_ioctl(drive, 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);