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ide-floppy: factor out ioctl handlers from idefloppy_ioctl()
By passing idefloppy_floppy_t *floppy to the factored out functions, we get rid of (almost) all local vars so stack usage should be at minimum here. Also, we merge idefloppy_begin_format() into idefloppy_format_start() since it is its only user. Also, rename idefloppy_format_start() to idefloppy_format_unit(). Finally, rename the reworked functions to ide_floppy..(). Bart - minor CodingStyle fixup Signed-off-by: Borislav Petkov <bbpetkov@yahoo.de> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
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@ -1289,44 +1289,6 @@ static int ide_floppy_get_format_capacities(ide_drive_t *drive, int __user *arg)
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return (0);
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}
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/*
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** Send ATAPI_FORMAT_UNIT to the drive.
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**
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** Userland gives us the following structure:
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**
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** struct idefloppy_format_command {
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** int nblocks;
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** int blocksize;
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** int flags;
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** } ;
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**
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** flags is a bitmask, currently, the only defined flag is:
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**
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** 0x01 - verify media after format.
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*/
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static int idefloppy_begin_format(ide_drive_t *drive, int __user *arg)
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{
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int blocks;
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int length;
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int flags;
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idefloppy_pc_t pc;
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if (get_user(blocks, arg) ||
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get_user(length, arg+1) ||
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get_user(flags, arg+2)) {
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return (-EFAULT);
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}
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(void) idefloppy_get_sfrp_bit(drive);
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idefloppy_create_format_unit_cmd(&pc, blocks, length, flags);
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if (idefloppy_queue_pc_tail(drive, &pc)) {
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return (-EIO);
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}
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return (0);
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}
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/*
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** Get ATAPI_FORMAT_UNIT progress indication.
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**
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@ -1678,64 +1640,105 @@ static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo)
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return 0;
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}
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static int ide_floppy_lockdoor(idefloppy_floppy_t *floppy, idefloppy_pc_t *pc,
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unsigned long arg, unsigned int cmd)
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{
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if (floppy->openers > 1)
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return -EBUSY;
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/* The IOMEGA Clik! Drive doesn't support this command -
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* no room for an eject mechanism */
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if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
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int prevent = arg ? 1 : 0;
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if (cmd == CDROMEJECT)
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prevent = 0;
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idefloppy_create_prevent_cmd(pc, prevent);
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(void) idefloppy_queue_pc_tail(floppy->drive, pc);
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}
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if (cmd == CDROMEJECT) {
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idefloppy_create_start_stop_cmd(pc, 2);
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(void) idefloppy_queue_pc_tail(floppy->drive, pc);
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}
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return 0;
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}
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static int ide_floppy_format_unit(idefloppy_floppy_t *floppy,
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int __user *arg)
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{
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int blocks, length, flags, err = 0;
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idefloppy_pc_t pc;
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if (floppy->openers > 1) {
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/* Don't format if someone is using the disk */
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clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
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return -EBUSY;
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}
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set_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
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/*
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* Send ATAPI_FORMAT_UNIT to the drive.
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*
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* Userland gives us the following structure:
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*
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* struct idefloppy_format_command {
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* int nblocks;
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* int blocksize;
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* int flags;
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* } ;
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*
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* flags is a bitmask, currently, the only defined flag is:
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*
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* 0x01 - verify media after format.
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*/
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if (get_user(blocks, arg) ||
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get_user(length, arg+1) ||
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get_user(flags, arg+2)) {
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err = -EFAULT;
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goto out;
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}
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(void) idefloppy_get_sfrp_bit(floppy->drive);
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idefloppy_create_format_unit_cmd(&pc, blocks, length, flags);
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if (idefloppy_queue_pc_tail(floppy->drive, &pc))
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err = -EIO;
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out:
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if (err)
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clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
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return err;
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}
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static int idefloppy_ioctl(struct inode *inode, struct file *file,
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unsigned int cmd, unsigned long arg)
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{
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struct block_device *bdev = inode->i_bdev;
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struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
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ide_drive_t *drive = floppy->drive;
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idefloppy_pc_t pc;
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void __user *argp = (void __user *)arg;
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int err;
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int prevent = (arg) ? 1 : 0;
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idefloppy_pc_t pc;
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switch (cmd) {
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case CDROMEJECT:
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prevent = 0;
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/* fall through */
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case CDROM_LOCKDOOR:
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if (floppy->openers > 1)
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return -EBUSY;
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/* The IOMEGA Clik! Drive doesn't support this command - no room for an eject mechanism */
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if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
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idefloppy_create_prevent_cmd(&pc, prevent);
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(void) idefloppy_queue_pc_tail(drive, &pc);
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}
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if (cmd == CDROMEJECT) {
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idefloppy_create_start_stop_cmd(&pc, 2);
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(void) idefloppy_queue_pc_tail(drive, &pc);
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}
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return 0;
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return ide_floppy_lockdoor(floppy, &pc, arg, cmd);
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case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED:
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return 0;
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case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY:
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return ide_floppy_get_format_capacities(drive, argp);
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case IDEFLOPPY_IOCTL_FORMAT_START:
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if (!(file->f_mode & 2))
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return -EPERM;
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if (floppy->openers > 1) {
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/* Don't format if someone is using the disk */
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clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS,
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&floppy->flags);
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return -EBUSY;
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}
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set_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
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err = idefloppy_begin_format(drive, argp);
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if (err)
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clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
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return err;
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/*
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** Note, the bit will be cleared when the device is
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** closed. This is the cleanest way to handle the
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** situation where the drive does not support
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** format progress reporting.
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*/
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return ide_floppy_format_unit(floppy, (int __user *)arg);
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case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS:
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return idefloppy_get_format_progress(drive, argp);
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}
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