diff options
Diffstat (limited to 'drivers/ide/ide-ioctls.c')
| -rw-r--r-- | drivers/ide/ide-ioctls.c | 306 |
1 files changed, 0 insertions, 306 deletions
diff --git a/drivers/ide/ide-ioctls.c b/drivers/ide/ide-ioctls.c deleted file mode 100644 index 43fbc37d85c3..000000000000 --- a/drivers/ide/ide-ioctls.c +++ /dev/null @@ -1,306 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * IDE ioctls handling. - */ - -#include <linux/compat.h> -#include <linux/export.h> -#include <linux/hdreg.h> -#include <linux/ide.h> -#include <linux/slab.h> - -static int put_user_long(long val, unsigned long arg) -{ - if (in_compat_syscall()) - return put_user(val, (compat_long_t __user *)compat_ptr(arg)); - - return put_user(val, (long __user *)arg); -} - -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_long(err, arg) : err; - -set_val: - if (bdev_is_partition(bdev)) - 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, - void __user *argp) -{ - 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(argp, 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_long((!!(drive->dev_flags & IDE_DFLAG_DSC_OVERLAP) - << IDE_NICE_DSC_OVERLAP) | - (!!(drive->dev_flags & IDE_DFLAG_NICE1) - << IDE_NICE_1), 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, void __user *argp) -{ - 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 == argp) { - struct request *rq; - - rq = blk_get_request(drive->queue, REQ_OP_DRV_IN, 0); - ide_req(rq)->type = ATA_PRIV_TASKFILE; - blk_execute_rq(NULL, rq, 0); - err = scsi_req(rq)->result ? -EIO : 0; - blk_put_request(rq); - - return err; - } - - if (copy_from_user(args, argp, 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(argp, &args, 4)) - err = -EFAULT; - if (buf) { - if (copy_to_user((argp + 4), buf, bufsize)) - err = -EFAULT; - kfree(buf); - } - return err; -} - -static int ide_task_ioctl(ide_drive_t *drive, void __user *p) -{ - 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, REQ_OP_DRV_IN, 0); - ide_req(rq)->type = ATA_PRIV_MISC; - scsi_req(rq)->cmd_len = 1; - scsi_req(rq)->cmd[0] = REQ_DRIVE_RESET; - blk_execute_rq(NULL, rq, 1); - ret = scsi_req(rq)->result; - 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; - void __user *argp = (void __user *)arg; - - if (in_compat_syscall()) - argp = compat_ptr(arg); - - 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_is_partition(bdev)) - return -EINVAL; - return ide_get_identity_ioctl(drive, cmd, argp); - 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; - /* missing compat handler for HDIO_DRIVE_TASKFILE */ - if (in_compat_syscall()) - return -ENOTTY; - 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, argp); - case HDIO_DRIVE_TASK: - if (!capable(CAP_SYS_RAWIO)) - return -EACCES; - return ide_task_ioctl(drive, argp); - 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_long(BUSSTATE_ON, 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); |