754 строки
21 KiB
C
754 строки
21 KiB
C
#include <linux/blkdev.h>
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#include <linux/blkpg.h>
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#include <linux/blktrace_api.h>
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#include <linux/cdrom.h>
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#include <linux/compat.h>
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#include <linux/elevator.h>
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#include <linux/fd.h>
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#include <linux/hdreg.h>
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#include <linux/slab.h>
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#include <linux/syscalls.h>
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#include <linux/types.h>
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#include <linux/uaccess.h>
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static int compat_put_ushort(unsigned long arg, unsigned short val)
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{
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return put_user(val, (unsigned short __user *)compat_ptr(arg));
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}
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static int compat_put_int(unsigned long arg, int val)
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{
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return put_user(val, (compat_int_t __user *)compat_ptr(arg));
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}
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static int compat_put_uint(unsigned long arg, unsigned int val)
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{
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return put_user(val, (compat_uint_t __user *)compat_ptr(arg));
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}
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static int compat_put_long(unsigned long arg, long val)
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{
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return put_user(val, (compat_long_t __user *)compat_ptr(arg));
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}
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static int compat_put_ulong(unsigned long arg, compat_ulong_t val)
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{
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return put_user(val, (compat_ulong_t __user *)compat_ptr(arg));
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}
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static int compat_put_u64(unsigned long arg, u64 val)
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{
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return put_user(val, (compat_u64 __user *)compat_ptr(arg));
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}
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struct compat_hd_geometry {
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unsigned char heads;
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unsigned char sectors;
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unsigned short cylinders;
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u32 start;
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};
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static int compat_hdio_getgeo(struct gendisk *disk, struct block_device *bdev,
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struct compat_hd_geometry __user *ugeo)
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{
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struct hd_geometry geo;
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int ret;
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if (!ugeo)
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return -EINVAL;
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if (!disk->fops->getgeo)
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return -ENOTTY;
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memset(&geo, 0, sizeof(geo));
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/*
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* We need to set the startsect first, the driver may
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* want to override it.
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*/
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geo.start = get_start_sect(bdev);
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ret = disk->fops->getgeo(bdev, &geo);
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if (ret)
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return ret;
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ret = copy_to_user(ugeo, &geo, 4);
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ret |= put_user(geo.start, &ugeo->start);
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if (ret)
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ret = -EFAULT;
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return ret;
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}
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static int compat_hdio_ioctl(struct block_device *bdev, fmode_t mode,
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unsigned int cmd, unsigned long arg)
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{
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mm_segment_t old_fs = get_fs();
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unsigned long kval;
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unsigned int __user *uvp;
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int error;
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set_fs(KERNEL_DS);
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error = __blkdev_driver_ioctl(bdev, mode,
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cmd, (unsigned long)(&kval));
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set_fs(old_fs);
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if (error == 0) {
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uvp = compat_ptr(arg);
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if (put_user(kval, uvp))
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error = -EFAULT;
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}
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return error;
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}
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struct compat_cdrom_read_audio {
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union cdrom_addr addr;
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u8 addr_format;
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compat_int_t nframes;
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compat_caddr_t buf;
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};
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struct compat_cdrom_generic_command {
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unsigned char cmd[CDROM_PACKET_SIZE];
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compat_caddr_t buffer;
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compat_uint_t buflen;
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compat_int_t stat;
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compat_caddr_t sense;
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unsigned char data_direction;
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compat_int_t quiet;
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compat_int_t timeout;
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compat_caddr_t reserved[1];
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};
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static int compat_cdrom_read_audio(struct block_device *bdev, fmode_t mode,
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unsigned int cmd, unsigned long arg)
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{
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struct cdrom_read_audio __user *cdread_audio;
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struct compat_cdrom_read_audio __user *cdread_audio32;
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__u32 data;
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void __user *datap;
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cdread_audio = compat_alloc_user_space(sizeof(*cdread_audio));
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cdread_audio32 = compat_ptr(arg);
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if (copy_in_user(&cdread_audio->addr,
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&cdread_audio32->addr,
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(sizeof(*cdread_audio32) -
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sizeof(compat_caddr_t))))
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return -EFAULT;
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if (get_user(data, &cdread_audio32->buf))
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return -EFAULT;
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datap = compat_ptr(data);
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if (put_user(datap, &cdread_audio->buf))
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return -EFAULT;
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return __blkdev_driver_ioctl(bdev, mode, cmd,
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(unsigned long)cdread_audio);
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}
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static int compat_cdrom_generic_command(struct block_device *bdev, fmode_t mode,
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unsigned int cmd, unsigned long arg)
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{
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struct cdrom_generic_command __user *cgc;
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struct compat_cdrom_generic_command __user *cgc32;
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u32 data;
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unsigned char dir;
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int itmp;
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cgc = compat_alloc_user_space(sizeof(*cgc));
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cgc32 = compat_ptr(arg);
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if (copy_in_user(&cgc->cmd, &cgc32->cmd, sizeof(cgc->cmd)) ||
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get_user(data, &cgc32->buffer) ||
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put_user(compat_ptr(data), &cgc->buffer) ||
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copy_in_user(&cgc->buflen, &cgc32->buflen,
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(sizeof(unsigned int) + sizeof(int))) ||
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get_user(data, &cgc32->sense) ||
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put_user(compat_ptr(data), &cgc->sense) ||
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get_user(dir, &cgc32->data_direction) ||
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put_user(dir, &cgc->data_direction) ||
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get_user(itmp, &cgc32->quiet) ||
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put_user(itmp, &cgc->quiet) ||
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get_user(itmp, &cgc32->timeout) ||
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put_user(itmp, &cgc->timeout) ||
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get_user(data, &cgc32->reserved[0]) ||
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put_user(compat_ptr(data), &cgc->reserved[0]))
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return -EFAULT;
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return __blkdev_driver_ioctl(bdev, mode, cmd, (unsigned long)cgc);
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}
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struct compat_blkpg_ioctl_arg {
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compat_int_t op;
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compat_int_t flags;
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compat_int_t datalen;
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compat_caddr_t data;
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};
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static int compat_blkpg_ioctl(struct block_device *bdev, fmode_t mode,
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unsigned int cmd, struct compat_blkpg_ioctl_arg __user *ua32)
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{
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struct blkpg_ioctl_arg __user *a = compat_alloc_user_space(sizeof(*a));
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compat_caddr_t udata;
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compat_int_t n;
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int err;
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err = get_user(n, &ua32->op);
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err |= put_user(n, &a->op);
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err |= get_user(n, &ua32->flags);
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err |= put_user(n, &a->flags);
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err |= get_user(n, &ua32->datalen);
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err |= put_user(n, &a->datalen);
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err |= get_user(udata, &ua32->data);
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err |= put_user(compat_ptr(udata), &a->data);
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if (err)
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return err;
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return blkdev_ioctl(bdev, mode, cmd, (unsigned long)a);
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}
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#define BLKBSZGET_32 _IOR(0x12, 112, int)
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#define BLKBSZSET_32 _IOW(0x12, 113, int)
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#define BLKGETSIZE64_32 _IOR(0x12, 114, int)
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struct compat_floppy_drive_params {
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char cmos;
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compat_ulong_t max_dtr;
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compat_ulong_t hlt;
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compat_ulong_t hut;
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compat_ulong_t srt;
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compat_ulong_t spinup;
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compat_ulong_t spindown;
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unsigned char spindown_offset;
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unsigned char select_delay;
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unsigned char rps;
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unsigned char tracks;
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compat_ulong_t timeout;
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unsigned char interleave_sect;
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struct floppy_max_errors max_errors;
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char flags;
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char read_track;
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short autodetect[8];
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compat_int_t checkfreq;
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compat_int_t native_format;
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};
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struct compat_floppy_drive_struct {
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signed char flags;
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compat_ulong_t spinup_date;
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compat_ulong_t select_date;
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compat_ulong_t first_read_date;
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short probed_format;
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short track;
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short maxblock;
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short maxtrack;
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compat_int_t generation;
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compat_int_t keep_data;
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compat_int_t fd_ref;
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compat_int_t fd_device;
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compat_int_t last_checked;
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compat_caddr_t dmabuf;
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compat_int_t bufblocks;
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};
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struct compat_floppy_fdc_state {
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compat_int_t spec1;
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compat_int_t spec2;
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compat_int_t dtr;
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unsigned char version;
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unsigned char dor;
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compat_ulong_t address;
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unsigned int rawcmd:2;
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unsigned int reset:1;
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unsigned int need_configure:1;
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unsigned int perp_mode:2;
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unsigned int has_fifo:1;
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unsigned int driver_version;
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unsigned char track[4];
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};
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struct compat_floppy_write_errors {
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unsigned int write_errors;
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compat_ulong_t first_error_sector;
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compat_int_t first_error_generation;
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compat_ulong_t last_error_sector;
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compat_int_t last_error_generation;
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compat_uint_t badness;
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};
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#define FDSETPRM32 _IOW(2, 0x42, struct compat_floppy_struct)
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#define FDDEFPRM32 _IOW(2, 0x43, struct compat_floppy_struct)
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#define FDSETDRVPRM32 _IOW(2, 0x90, struct compat_floppy_drive_params)
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#define FDGETDRVPRM32 _IOR(2, 0x11, struct compat_floppy_drive_params)
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#define FDGETDRVSTAT32 _IOR(2, 0x12, struct compat_floppy_drive_struct)
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#define FDPOLLDRVSTAT32 _IOR(2, 0x13, struct compat_floppy_drive_struct)
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#define FDGETFDCSTAT32 _IOR(2, 0x15, struct compat_floppy_fdc_state)
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#define FDWERRORGET32 _IOR(2, 0x17, struct compat_floppy_write_errors)
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static struct {
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unsigned int cmd32;
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unsigned int cmd;
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} fd_ioctl_trans_table[] = {
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{ FDSETPRM32, FDSETPRM },
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{ FDDEFPRM32, FDDEFPRM },
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{ FDGETPRM32, FDGETPRM },
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{ FDSETDRVPRM32, FDSETDRVPRM },
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{ FDGETDRVPRM32, FDGETDRVPRM },
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{ FDGETDRVSTAT32, FDGETDRVSTAT },
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{ FDPOLLDRVSTAT32, FDPOLLDRVSTAT },
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{ FDGETFDCSTAT32, FDGETFDCSTAT },
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{ FDWERRORGET32, FDWERRORGET }
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};
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#define NR_FD_IOCTL_TRANS ARRAY_SIZE(fd_ioctl_trans_table)
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static int compat_fd_ioctl(struct block_device *bdev, fmode_t mode,
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unsigned int cmd, unsigned long arg)
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{
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mm_segment_t old_fs = get_fs();
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void *karg = NULL;
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unsigned int kcmd = 0;
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int i, err;
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for (i = 0; i < NR_FD_IOCTL_TRANS; i++)
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if (cmd == fd_ioctl_trans_table[i].cmd32) {
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kcmd = fd_ioctl_trans_table[i].cmd;
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break;
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}
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if (!kcmd)
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return -EINVAL;
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switch (cmd) {
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case FDSETPRM32:
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case FDDEFPRM32:
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case FDGETPRM32:
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{
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compat_uptr_t name;
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struct compat_floppy_struct __user *uf;
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struct floppy_struct *f;
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uf = compat_ptr(arg);
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f = karg = kmalloc(sizeof(struct floppy_struct), GFP_KERNEL);
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if (!karg)
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return -ENOMEM;
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if (cmd == FDGETPRM32)
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break;
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err = __get_user(f->size, &uf->size);
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err |= __get_user(f->sect, &uf->sect);
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err |= __get_user(f->head, &uf->head);
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err |= __get_user(f->track, &uf->track);
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err |= __get_user(f->stretch, &uf->stretch);
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err |= __get_user(f->gap, &uf->gap);
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err |= __get_user(f->rate, &uf->rate);
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err |= __get_user(f->spec1, &uf->spec1);
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err |= __get_user(f->fmt_gap, &uf->fmt_gap);
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err |= __get_user(name, &uf->name);
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f->name = compat_ptr(name);
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if (err) {
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err = -EFAULT;
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goto out;
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}
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break;
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}
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case FDSETDRVPRM32:
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case FDGETDRVPRM32:
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{
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struct compat_floppy_drive_params __user *uf;
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struct floppy_drive_params *f;
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uf = compat_ptr(arg);
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f = karg = kmalloc(sizeof(struct floppy_drive_params), GFP_KERNEL);
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if (!karg)
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return -ENOMEM;
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if (cmd == FDGETDRVPRM32)
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break;
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err = __get_user(f->cmos, &uf->cmos);
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err |= __get_user(f->max_dtr, &uf->max_dtr);
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err |= __get_user(f->hlt, &uf->hlt);
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err |= __get_user(f->hut, &uf->hut);
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err |= __get_user(f->srt, &uf->srt);
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err |= __get_user(f->spinup, &uf->spinup);
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err |= __get_user(f->spindown, &uf->spindown);
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err |= __get_user(f->spindown_offset, &uf->spindown_offset);
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err |= __get_user(f->select_delay, &uf->select_delay);
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err |= __get_user(f->rps, &uf->rps);
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err |= __get_user(f->tracks, &uf->tracks);
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err |= __get_user(f->timeout, &uf->timeout);
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err |= __get_user(f->interleave_sect, &uf->interleave_sect);
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err |= __copy_from_user(&f->max_errors, &uf->max_errors, sizeof(f->max_errors));
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err |= __get_user(f->flags, &uf->flags);
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err |= __get_user(f->read_track, &uf->read_track);
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err |= __copy_from_user(f->autodetect, uf->autodetect, sizeof(f->autodetect));
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err |= __get_user(f->checkfreq, &uf->checkfreq);
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err |= __get_user(f->native_format, &uf->native_format);
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if (err) {
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err = -EFAULT;
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goto out;
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}
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break;
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}
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case FDGETDRVSTAT32:
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case FDPOLLDRVSTAT32:
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karg = kmalloc(sizeof(struct floppy_drive_struct), GFP_KERNEL);
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if (!karg)
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return -ENOMEM;
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break;
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case FDGETFDCSTAT32:
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karg = kmalloc(sizeof(struct floppy_fdc_state), GFP_KERNEL);
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if (!karg)
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return -ENOMEM;
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break;
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case FDWERRORGET32:
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karg = kmalloc(sizeof(struct floppy_write_errors), GFP_KERNEL);
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if (!karg)
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return -ENOMEM;
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break;
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default:
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return -EINVAL;
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}
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set_fs(KERNEL_DS);
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err = __blkdev_driver_ioctl(bdev, mode, kcmd, (unsigned long)karg);
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set_fs(old_fs);
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if (err)
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goto out;
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switch (cmd) {
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case FDGETPRM32:
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{
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struct floppy_struct *f = karg;
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struct compat_floppy_struct __user *uf = compat_ptr(arg);
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err = __put_user(f->size, &uf->size);
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err |= __put_user(f->sect, &uf->sect);
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err |= __put_user(f->head, &uf->head);
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err |= __put_user(f->track, &uf->track);
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err |= __put_user(f->stretch, &uf->stretch);
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err |= __put_user(f->gap, &uf->gap);
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err |= __put_user(f->rate, &uf->rate);
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err |= __put_user(f->spec1, &uf->spec1);
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err |= __put_user(f->fmt_gap, &uf->fmt_gap);
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err |= __put_user((u64)f->name, (compat_caddr_t __user *)&uf->name);
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break;
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}
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case FDGETDRVPRM32:
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{
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struct compat_floppy_drive_params __user *uf;
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struct floppy_drive_params *f = karg;
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uf = compat_ptr(arg);
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err = __put_user(f->cmos, &uf->cmos);
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err |= __put_user(f->max_dtr, &uf->max_dtr);
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err |= __put_user(f->hlt, &uf->hlt);
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err |= __put_user(f->hut, &uf->hut);
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err |= __put_user(f->srt, &uf->srt);
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err |= __put_user(f->spinup, &uf->spinup);
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err |= __put_user(f->spindown, &uf->spindown);
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err |= __put_user(f->spindown_offset, &uf->spindown_offset);
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err |= __put_user(f->select_delay, &uf->select_delay);
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err |= __put_user(f->rps, &uf->rps);
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err |= __put_user(f->tracks, &uf->tracks);
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err |= __put_user(f->timeout, &uf->timeout);
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err |= __put_user(f->interleave_sect, &uf->interleave_sect);
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err |= __copy_to_user(&uf->max_errors, &f->max_errors, sizeof(f->max_errors));
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err |= __put_user(f->flags, &uf->flags);
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err |= __put_user(f->read_track, &uf->read_track);
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err |= __copy_to_user(uf->autodetect, f->autodetect, sizeof(f->autodetect));
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err |= __put_user(f->checkfreq, &uf->checkfreq);
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err |= __put_user(f->native_format, &uf->native_format);
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break;
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}
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case FDGETDRVSTAT32:
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case FDPOLLDRVSTAT32:
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{
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struct compat_floppy_drive_struct __user *uf;
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struct floppy_drive_struct *f = karg;
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uf = compat_ptr(arg);
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err = __put_user(f->flags, &uf->flags);
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err |= __put_user(f->spinup_date, &uf->spinup_date);
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err |= __put_user(f->select_date, &uf->select_date);
|
|
err |= __put_user(f->first_read_date, &uf->first_read_date);
|
|
err |= __put_user(f->probed_format, &uf->probed_format);
|
|
err |= __put_user(f->track, &uf->track);
|
|
err |= __put_user(f->maxblock, &uf->maxblock);
|
|
err |= __put_user(f->maxtrack, &uf->maxtrack);
|
|
err |= __put_user(f->generation, &uf->generation);
|
|
err |= __put_user(f->keep_data, &uf->keep_data);
|
|
err |= __put_user(f->fd_ref, &uf->fd_ref);
|
|
err |= __put_user(f->fd_device, &uf->fd_device);
|
|
err |= __put_user(f->last_checked, &uf->last_checked);
|
|
err |= __put_user((u64)f->dmabuf, &uf->dmabuf);
|
|
err |= __put_user((u64)f->bufblocks, &uf->bufblocks);
|
|
break;
|
|
}
|
|
case FDGETFDCSTAT32:
|
|
{
|
|
struct compat_floppy_fdc_state __user *uf;
|
|
struct floppy_fdc_state *f = karg;
|
|
|
|
uf = compat_ptr(arg);
|
|
err = __put_user(f->spec1, &uf->spec1);
|
|
err |= __put_user(f->spec2, &uf->spec2);
|
|
err |= __put_user(f->dtr, &uf->dtr);
|
|
err |= __put_user(f->version, &uf->version);
|
|
err |= __put_user(f->dor, &uf->dor);
|
|
err |= __put_user(f->address, &uf->address);
|
|
err |= __copy_to_user((char __user *)&uf->address + sizeof(uf->address),
|
|
(char *)&f->address + sizeof(f->address), sizeof(int));
|
|
err |= __put_user(f->driver_version, &uf->driver_version);
|
|
err |= __copy_to_user(uf->track, f->track, sizeof(f->track));
|
|
break;
|
|
}
|
|
case FDWERRORGET32:
|
|
{
|
|
struct compat_floppy_write_errors __user *uf;
|
|
struct floppy_write_errors *f = karg;
|
|
|
|
uf = compat_ptr(arg);
|
|
err = __put_user(f->write_errors, &uf->write_errors);
|
|
err |= __put_user(f->first_error_sector, &uf->first_error_sector);
|
|
err |= __put_user(f->first_error_generation, &uf->first_error_generation);
|
|
err |= __put_user(f->last_error_sector, &uf->last_error_sector);
|
|
err |= __put_user(f->last_error_generation, &uf->last_error_generation);
|
|
err |= __put_user(f->badness, &uf->badness);
|
|
break;
|
|
}
|
|
default:
|
|
break;
|
|
}
|
|
if (err)
|
|
err = -EFAULT;
|
|
|
|
out:
|
|
kfree(karg);
|
|
return err;
|
|
}
|
|
|
|
static int compat_blkdev_driver_ioctl(struct block_device *bdev, fmode_t mode,
|
|
unsigned cmd, unsigned long arg)
|
|
{
|
|
switch (cmd) {
|
|
case HDIO_GET_UNMASKINTR:
|
|
case HDIO_GET_MULTCOUNT:
|
|
case HDIO_GET_KEEPSETTINGS:
|
|
case HDIO_GET_32BIT:
|
|
case HDIO_GET_NOWERR:
|
|
case HDIO_GET_DMA:
|
|
case HDIO_GET_NICE:
|
|
case HDIO_GET_WCACHE:
|
|
case HDIO_GET_ACOUSTIC:
|
|
case HDIO_GET_ADDRESS:
|
|
case HDIO_GET_BUSSTATE:
|
|
return compat_hdio_ioctl(bdev, mode, cmd, arg);
|
|
case FDSETPRM32:
|
|
case FDDEFPRM32:
|
|
case FDGETPRM32:
|
|
case FDSETDRVPRM32:
|
|
case FDGETDRVPRM32:
|
|
case FDGETDRVSTAT32:
|
|
case FDPOLLDRVSTAT32:
|
|
case FDGETFDCSTAT32:
|
|
case FDWERRORGET32:
|
|
return compat_fd_ioctl(bdev, mode, cmd, arg);
|
|
case CDROMREADAUDIO:
|
|
return compat_cdrom_read_audio(bdev, mode, cmd, arg);
|
|
case CDROM_SEND_PACKET:
|
|
return compat_cdrom_generic_command(bdev, mode, cmd, arg);
|
|
|
|
/*
|
|
* No handler required for the ones below, we just need to
|
|
* convert arg to a 64 bit pointer.
|
|
*/
|
|
case BLKSECTSET:
|
|
/*
|
|
* 0x03 -- HD/IDE ioctl's used by hdparm and friends.
|
|
* Some need translations, these do not.
|
|
*/
|
|
case HDIO_GET_IDENTITY:
|
|
case HDIO_DRIVE_TASK:
|
|
case HDIO_DRIVE_CMD:
|
|
/* 0x330 is reserved -- it used to be HDIO_GETGEO_BIG */
|
|
case 0x330:
|
|
/* 0x02 -- Floppy ioctls */
|
|
case FDMSGON:
|
|
case FDMSGOFF:
|
|
case FDSETEMSGTRESH:
|
|
case FDFLUSH:
|
|
case FDWERRORCLR:
|
|
case FDSETMAXERRS:
|
|
case FDGETMAXERRS:
|
|
case FDGETDRVTYP:
|
|
case FDEJECT:
|
|
case FDCLRPRM:
|
|
case FDFMTBEG:
|
|
case FDFMTEND:
|
|
case FDRESET:
|
|
case FDTWADDLE:
|
|
case FDFMTTRK:
|
|
case FDRAWCMD:
|
|
/* CDROM stuff */
|
|
case CDROMPAUSE:
|
|
case CDROMRESUME:
|
|
case CDROMPLAYMSF:
|
|
case CDROMPLAYTRKIND:
|
|
case CDROMREADTOCHDR:
|
|
case CDROMREADTOCENTRY:
|
|
case CDROMSTOP:
|
|
case CDROMSTART:
|
|
case CDROMEJECT:
|
|
case CDROMVOLCTRL:
|
|
case CDROMSUBCHNL:
|
|
case CDROMMULTISESSION:
|
|
case CDROM_GET_MCN:
|
|
case CDROMRESET:
|
|
case CDROMVOLREAD:
|
|
case CDROMSEEK:
|
|
case CDROMPLAYBLK:
|
|
case CDROMCLOSETRAY:
|
|
case CDROM_DISC_STATUS:
|
|
case CDROM_CHANGER_NSLOTS:
|
|
case CDROM_GET_CAPABILITY:
|
|
/* Ignore cdrom.h about these next 5 ioctls, they absolutely do
|
|
* not take a struct cdrom_read, instead they take a struct cdrom_msf
|
|
* which is compatible.
|
|
*/
|
|
case CDROMREADMODE2:
|
|
case CDROMREADMODE1:
|
|
case CDROMREADRAW:
|
|
case CDROMREADCOOKED:
|
|
case CDROMREADALL:
|
|
/* DVD ioctls */
|
|
case DVD_READ_STRUCT:
|
|
case DVD_WRITE_STRUCT:
|
|
case DVD_AUTH:
|
|
arg = (unsigned long)compat_ptr(arg);
|
|
/* These intepret arg as an unsigned long, not as a pointer,
|
|
* so we must not do compat_ptr() conversion. */
|
|
case HDIO_SET_MULTCOUNT:
|
|
case HDIO_SET_UNMASKINTR:
|
|
case HDIO_SET_KEEPSETTINGS:
|
|
case HDIO_SET_32BIT:
|
|
case HDIO_SET_NOWERR:
|
|
case HDIO_SET_DMA:
|
|
case HDIO_SET_PIO_MODE:
|
|
case HDIO_SET_NICE:
|
|
case HDIO_SET_WCACHE:
|
|
case HDIO_SET_ACOUSTIC:
|
|
case HDIO_SET_BUSSTATE:
|
|
case HDIO_SET_ADDRESS:
|
|
case CDROMEJECT_SW:
|
|
case CDROM_SET_OPTIONS:
|
|
case CDROM_CLEAR_OPTIONS:
|
|
case CDROM_SELECT_SPEED:
|
|
case CDROM_SELECT_DISC:
|
|
case CDROM_MEDIA_CHANGED:
|
|
case CDROM_DRIVE_STATUS:
|
|
case CDROM_LOCKDOOR:
|
|
case CDROM_DEBUG:
|
|
break;
|
|
default:
|
|
/* unknown ioctl number */
|
|
return -ENOIOCTLCMD;
|
|
}
|
|
|
|
return __blkdev_driver_ioctl(bdev, mode, cmd, arg);
|
|
}
|
|
|
|
/* Most of the generic ioctls are handled in the normal fallback path.
|
|
This assumes the blkdev's low level compat_ioctl always returns
|
|
ENOIOCTLCMD for unknown ioctls. */
|
|
long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg)
|
|
{
|
|
int ret = -ENOIOCTLCMD;
|
|
struct inode *inode = file->f_mapping->host;
|
|
struct block_device *bdev = inode->i_bdev;
|
|
struct gendisk *disk = bdev->bd_disk;
|
|
fmode_t mode = file->f_mode;
|
|
loff_t size;
|
|
unsigned int max_sectors;
|
|
|
|
/*
|
|
* O_NDELAY can be altered using fcntl(.., F_SETFL, ..), so we have
|
|
* to updated it before every ioctl.
|
|
*/
|
|
if (file->f_flags & O_NDELAY)
|
|
mode |= FMODE_NDELAY;
|
|
else
|
|
mode &= ~FMODE_NDELAY;
|
|
|
|
switch (cmd) {
|
|
case HDIO_GETGEO:
|
|
return compat_hdio_getgeo(disk, bdev, compat_ptr(arg));
|
|
case BLKPBSZGET:
|
|
return compat_put_uint(arg, bdev_physical_block_size(bdev));
|
|
case BLKIOMIN:
|
|
return compat_put_uint(arg, bdev_io_min(bdev));
|
|
case BLKIOOPT:
|
|
return compat_put_uint(arg, bdev_io_opt(bdev));
|
|
case BLKALIGNOFF:
|
|
return compat_put_int(arg, bdev_alignment_offset(bdev));
|
|
case BLKDISCARDZEROES:
|
|
return compat_put_uint(arg, bdev_discard_zeroes_data(bdev));
|
|
case BLKFLSBUF:
|
|
case BLKROSET:
|
|
case BLKDISCARD:
|
|
case BLKSECDISCARD:
|
|
case BLKZEROOUT:
|
|
/*
|
|
* the ones below are implemented in blkdev_locked_ioctl,
|
|
* but we call blkdev_ioctl, which gets the lock for us
|
|
*/
|
|
case BLKRRPART:
|
|
return blkdev_ioctl(bdev, mode, cmd,
|
|
(unsigned long)compat_ptr(arg));
|
|
case BLKBSZSET_32:
|
|
return blkdev_ioctl(bdev, mode, BLKBSZSET,
|
|
(unsigned long)compat_ptr(arg));
|
|
case BLKPG:
|
|
return compat_blkpg_ioctl(bdev, mode, cmd, compat_ptr(arg));
|
|
case BLKRAGET:
|
|
case BLKFRAGET:
|
|
if (!arg)
|
|
return -EINVAL;
|
|
return compat_put_long(arg,
|
|
(bdev->bd_bdi->ra_pages * PAGE_SIZE) / 512);
|
|
case BLKROGET: /* compatible */
|
|
return compat_put_int(arg, bdev_read_only(bdev) != 0);
|
|
case BLKBSZGET_32: /* get the logical block size (cf. BLKSSZGET) */
|
|
return compat_put_int(arg, block_size(bdev));
|
|
case BLKSSZGET: /* get block device hardware sector size */
|
|
return compat_put_int(arg, bdev_logical_block_size(bdev));
|
|
case BLKSECTGET:
|
|
max_sectors = min_t(unsigned int, USHRT_MAX,
|
|
queue_max_sectors(bdev_get_queue(bdev)));
|
|
return compat_put_ushort(arg, max_sectors);
|
|
case BLKROTATIONAL:
|
|
return compat_put_ushort(arg,
|
|
!blk_queue_nonrot(bdev_get_queue(bdev)));
|
|
case BLKRASET: /* compatible, but no compat_ptr (!) */
|
|
case BLKFRASET:
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EACCES;
|
|
bdev->bd_bdi->ra_pages = (arg * 512) / PAGE_SIZE;
|
|
return 0;
|
|
case BLKGETSIZE:
|
|
size = i_size_read(bdev->bd_inode);
|
|
if ((size >> 9) > ~0UL)
|
|
return -EFBIG;
|
|
return compat_put_ulong(arg, size >> 9);
|
|
|
|
case BLKGETSIZE64_32:
|
|
return compat_put_u64(arg, i_size_read(bdev->bd_inode));
|
|
|
|
case BLKTRACESETUP32:
|
|
case BLKTRACESTART: /* compatible */
|
|
case BLKTRACESTOP: /* compatible */
|
|
case BLKTRACETEARDOWN: /* compatible */
|
|
ret = blk_trace_ioctl(bdev, cmd, compat_ptr(arg));
|
|
return ret;
|
|
default:
|
|
if (disk->fops->compat_ioctl)
|
|
ret = disk->fops->compat_ioctl(bdev, mode, cmd, arg);
|
|
if (ret == -ENOIOCTLCMD)
|
|
ret = compat_blkdev_driver_ioctl(bdev, mode, cmd, arg);
|
|
return ret;
|
|
}
|
|
}
|