diff options
Diffstat (limited to 'drivers/ide/ide-floppy_ioctl.c')
| -rw-r--r-- | drivers/ide/ide-floppy_ioctl.c | 339 |
1 files changed, 0 insertions, 339 deletions
diff --git a/drivers/ide/ide-floppy_ioctl.c b/drivers/ide/ide-floppy_ioctl.c deleted file mode 100644 index 39a790ac6cc3..000000000000 --- a/drivers/ide/ide-floppy_ioctl.c +++ /dev/null @@ -1,339 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * ide-floppy IOCTLs handling. - */ - -#include <linux/kernel.h> -#include <linux/ide.h> -#include <linux/compat.h> -#include <linux/cdrom.h> -#include <linux/mutex.h> - -#include <asm/unaligned.h> - -#include <scsi/scsi_ioctl.h> - -#include "ide-floppy.h" - -/* - * Obtain the list of formattable capacities. - * Very similar to ide_floppy_get_capacity, except that we push the capacity - * descriptors to userland, instead of our own structures. - * - * Userland gives us the following structure: - * - * struct idefloppy_format_capacities { - * int nformats; - * struct { - * int nblocks; - * int blocksize; - * } formats[]; - * }; - * - * userland initializes nformats to the number of allocated formats[] records. - * On exit we set nformats to the number of records we've actually initialized. - */ - -static DEFINE_MUTEX(ide_floppy_ioctl_mutex); -static int ide_floppy_get_format_capacities(ide_drive_t *drive, - struct ide_atapi_pc *pc, - int __user *arg) -{ - struct ide_disk_obj *floppy = drive->driver_data; - int i, blocks, length, u_array_size, u_index; - int __user *argp; - u8 pc_buf[256], header_len, desc_cnt; - - if (get_user(u_array_size, arg)) - return -EFAULT; - - if (u_array_size <= 0) - return -EINVAL; - - ide_floppy_create_read_capacity_cmd(pc); - - if (ide_queue_pc_tail(drive, floppy->disk, pc, pc_buf, pc->req_xfer)) { - printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n"); - return -EIO; - } - - header_len = pc_buf[3]; - desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */ - - u_index = 0; - argp = arg + 1; - - /* - * We always skip the first capacity descriptor. That's the current - * capacity. We are interested in the remaining descriptors, the - * formattable capacities. - */ - for (i = 1; i < desc_cnt; i++) { - unsigned int desc_start = 4 + i*8; - - if (u_index >= u_array_size) - break; /* User-supplied buffer too small */ - - blocks = be32_to_cpup((__be32 *)&pc_buf[desc_start]); - length = be16_to_cpup((__be16 *)&pc_buf[desc_start + 6]); - - if (put_user(blocks, argp)) - return -EFAULT; - - ++argp; - - if (put_user(length, argp)) - return -EFAULT; - - ++argp; - - ++u_index; - } - - if (put_user(u_index, arg)) - return -EFAULT; - - return 0; -} - -static void ide_floppy_create_format_unit_cmd(struct ide_atapi_pc *pc, - u8 *buf, int b, int l, - int flags) -{ - ide_init_pc(pc); - pc->c[0] = GPCMD_FORMAT_UNIT; - pc->c[1] = 0x17; - - memset(buf, 0, 12); - buf[1] = 0xA2; - /* Default format list header, u8 1: FOV/DCRT/IMM bits set */ - - if (flags & 1) /* Verify bit on... */ - buf[1] ^= 0x20; /* ... turn off DCRT bit */ - buf[3] = 8; - - put_unaligned(cpu_to_be32(b), (unsigned int *)(&buf[4])); - put_unaligned(cpu_to_be32(l), (unsigned int *)(&buf[8])); - pc->req_xfer = 12; - pc->flags |= PC_FLAG_WRITING; -} - -static int ide_floppy_get_sfrp_bit(ide_drive_t *drive, struct ide_atapi_pc *pc) -{ - struct ide_disk_obj *floppy = drive->driver_data; - u8 buf[20]; - - drive->atapi_flags &= ~IDE_AFLAG_SRFP; - - ide_floppy_create_mode_sense_cmd(pc, IDEFLOPPY_CAPABILITIES_PAGE); - pc->flags |= PC_FLAG_SUPPRESS_ERROR; - - if (ide_queue_pc_tail(drive, floppy->disk, pc, buf, pc->req_xfer)) - return 1; - - if (buf[8 + 2] & 0x40) - drive->atapi_flags |= IDE_AFLAG_SRFP; - - return 0; -} - -static int ide_floppy_format_unit(ide_drive_t *drive, struct ide_atapi_pc *pc, - int __user *arg) -{ - struct ide_disk_obj *floppy = drive->driver_data; - u8 buf[12]; - int blocks, length, flags, err = 0; - - if (floppy->openers > 1) { - /* Don't format if someone is using the disk */ - drive->dev_flags &= ~IDE_DFLAG_FORMAT_IN_PROGRESS; - return -EBUSY; - } - - drive->dev_flags |= IDE_DFLAG_FORMAT_IN_PROGRESS; - - /* - * Send ATAPI_FORMAT_UNIT to the drive. - * - * Userland gives us the following structure: - * - * struct idefloppy_format_command { - * int nblocks; - * int blocksize; - * int flags; - * } ; - * - * flags is a bitmask, currently, the only defined flag is: - * - * 0x01 - verify media after format. - */ - if (get_user(blocks, arg) || - get_user(length, arg+1) || - get_user(flags, arg+2)) { - err = -EFAULT; - goto out; - } - - ide_floppy_get_sfrp_bit(drive, pc); - ide_floppy_create_format_unit_cmd(pc, buf, blocks, length, flags); - - if (ide_queue_pc_tail(drive, floppy->disk, pc, buf, pc->req_xfer)) - err = -EIO; - -out: - if (err) - drive->dev_flags &= ~IDE_DFLAG_FORMAT_IN_PROGRESS; - return err; -} - -/* - * Get ATAPI_FORMAT_UNIT progress indication. - * - * Userland gives a pointer to an int. The int is set to a progress - * indicator 0-65536, with 65536=100%. - * - * If the drive does not support format progress indication, we just check - * the dsc bit, and return either 0 or 65536. - */ - -static int ide_floppy_get_format_progress(ide_drive_t *drive, - struct ide_atapi_pc *pc, - int __user *arg) -{ - struct ide_disk_obj *floppy = drive->driver_data; - u8 sense_buf[18]; - int progress_indication = 0x10000; - - if (drive->atapi_flags & IDE_AFLAG_SRFP) { - ide_create_request_sense_cmd(drive, pc); - if (ide_queue_pc_tail(drive, floppy->disk, pc, sense_buf, - pc->req_xfer)) - return -EIO; - - if (floppy->sense_key == 2 && - floppy->asc == 4 && - floppy->ascq == 4) - progress_indication = floppy->progress_indication; - - /* Else assume format_unit has finished, and we're at 0x10000 */ - } else { - ide_hwif_t *hwif = drive->hwif; - unsigned long flags; - u8 stat; - - local_irq_save(flags); - stat = hwif->tp_ops->read_status(hwif); - local_irq_restore(flags); - - progress_indication = ((stat & ATA_DSC) == 0) ? 0 : 0x10000; - } - - if (put_user(progress_indication, arg)) - return -EFAULT; - - return 0; -} - -static int ide_floppy_lockdoor(ide_drive_t *drive, struct ide_atapi_pc *pc, - unsigned long arg, unsigned int cmd) -{ - struct ide_disk_obj *floppy = drive->driver_data; - struct gendisk *disk = floppy->disk; - int prevent = (arg && cmd != CDROMEJECT) ? 1 : 0; - - if (floppy->openers > 1) - return -EBUSY; - - ide_set_media_lock(drive, disk, prevent); - - if (cmd == CDROMEJECT) - ide_do_start_stop(drive, disk, 2); - - return 0; -} - -static int ide_floppy_format_ioctl(ide_drive_t *drive, struct ide_atapi_pc *pc, - fmode_t mode, unsigned int cmd, - void __user *argp) -{ - switch (cmd) { - case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED: - return 0; - case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY: - return ide_floppy_get_format_capacities(drive, pc, argp); - case IDEFLOPPY_IOCTL_FORMAT_START: - if (!(mode & FMODE_WRITE)) - return -EPERM; - return ide_floppy_format_unit(drive, pc, (int __user *)argp); - case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS: - return ide_floppy_get_format_progress(drive, pc, argp); - default: - return -ENOTTY; - } -} - -int ide_floppy_ioctl(ide_drive_t *drive, struct block_device *bdev, - fmode_t mode, unsigned int cmd, unsigned long arg) -{ - struct ide_atapi_pc pc; - void __user *argp = (void __user *)arg; - int err; - - mutex_lock(&ide_floppy_ioctl_mutex); - if (cmd == CDROMEJECT || cmd == CDROM_LOCKDOOR) { - err = ide_floppy_lockdoor(drive, &pc, arg, cmd); - goto out; - } - - err = ide_floppy_format_ioctl(drive, &pc, mode, cmd, argp); - if (err != -ENOTTY) - goto out; - - /* - * skip SCSI_IOCTL_SEND_COMMAND (deprecated) - * and CDROM_SEND_PACKET (legacy) ioctls - */ - if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND) - err = scsi_cmd_blk_ioctl(bdev, mode, cmd, argp); - - if (err == -ENOTTY) - err = generic_ide_ioctl(drive, bdev, cmd, arg); - -out: - mutex_unlock(&ide_floppy_ioctl_mutex); - return err; -} - -#ifdef CONFIG_COMPAT -int ide_floppy_compat_ioctl(ide_drive_t *drive, struct block_device *bdev, - fmode_t mode, unsigned int cmd, unsigned long arg) -{ - struct ide_atapi_pc pc; - void __user *argp = compat_ptr(arg); - int err; - - mutex_lock(&ide_floppy_ioctl_mutex); - if (cmd == CDROMEJECT || cmd == CDROM_LOCKDOOR) { - err = ide_floppy_lockdoor(drive, &pc, arg, cmd); - goto out; - } - - err = ide_floppy_format_ioctl(drive, &pc, mode, cmd, argp); - if (err != -ENOTTY) - goto out; - - /* - * skip SCSI_IOCTL_SEND_COMMAND (deprecated) - * and CDROM_SEND_PACKET (legacy) ioctls - */ - if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND) - err = scsi_cmd_blk_ioctl(bdev, mode, cmd, argp); - - if (err == -ENOTTY) - err = generic_ide_ioctl(drive, bdev, cmd, arg); - -out: - mutex_unlock(&ide_floppy_ioctl_mutex); - return err; -} -#endif |