Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) #include <linux/capability.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3) #include <linux/compat.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4) #include <linux/blkdev.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5) #include <linux/export.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6) #include <linux/gfp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) #include <linux/blkpg.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) #include <linux/hdreg.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #include <linux/backing-dev.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/blktrace_api.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/pr.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include "blk.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) static int blkpg_do_ioctl(struct block_device *bdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) 			  struct blkpg_partition __user *upart, int op)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) 	struct blkpg_partition p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) 	long long start, length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) 	if (!capable(CAP_SYS_ADMIN))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) 		return -EACCES;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 	if (copy_from_user(&p, upart, sizeof(struct blkpg_partition)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 		return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 	if (bdev_is_partition(bdev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 	if (p.pno <= 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 	if (op == BLKPG_DEL_PARTITION)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 		return bdev_del_partition(bdev, p.pno);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 	start = p.start >> SECTOR_SHIFT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 	length = p.length >> SECTOR_SHIFT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 	/* check for fit in a hd_struct */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 	if (sizeof(sector_t) < sizeof(long long)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 		long pstart = start, plength = length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 		if (pstart != start || plength != length || pstart < 0 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 		    plength < 0 || p.pno > 65535)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 			return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	switch (op) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	case BLKPG_ADD_PARTITION:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 		/* check if partition is aligned to blocksize */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 		if (p.start & (bdev_logical_block_size(bdev) - 1))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 			return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 		return bdev_add_partition(bdev, p.pno, start, length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	case BLKPG_RESIZE_PARTITION:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 		return bdev_resize_partition(bdev, p.pno, start, length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) static int blkpg_ioctl(struct block_device *bdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 		       struct blkpg_ioctl_arg __user *arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 	struct blkpg_partition __user *udata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 	int op;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	if (get_user(op, &arg->op) || get_user(udata, &arg->data))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 		return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	return blkpg_do_ioctl(bdev, udata, op);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) #ifdef CONFIG_COMPAT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) struct compat_blkpg_ioctl_arg {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	compat_int_t op;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	compat_int_t flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 	compat_int_t datalen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	compat_caddr_t data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) static int compat_blkpg_ioctl(struct block_device *bdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 			      struct compat_blkpg_ioctl_arg __user *arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 	compat_caddr_t udata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 	int op;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 	if (get_user(op, &arg->op) || get_user(udata, &arg->data))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 		return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	return blkpg_do_ioctl(bdev, compat_ptr(udata), op);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) static int blkdev_reread_part(struct block_device *bdev, fmode_t mode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 	struct block_device *tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	if (!disk_part_scan_enabled(bdev->bd_disk) || bdev_is_partition(bdev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 	if (!capable(CAP_SYS_ADMIN))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 		return -EACCES;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	if (bdev->bd_part_count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 		return -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	 * Reopen the device to revalidate the driver state and force a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	 * partition rescan.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	mode &= ~FMODE_EXCL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	set_bit(GD_NEED_PART_SCAN, &bdev->bd_disk->state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	tmp = blkdev_get_by_dev(bdev->bd_dev, mode, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	if (IS_ERR(tmp))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 		return PTR_ERR(tmp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 	blkdev_put(tmp, mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) static int blk_ioctl_discard(struct block_device *bdev, fmode_t mode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 		unsigned long arg, unsigned long flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	uint64_t range[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 	uint64_t start, len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 	struct request_queue *q = bdev_get_queue(bdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 	if (!(mode & FMODE_WRITE))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 		return -EBADF;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	if (!blk_queue_discard(q))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 		return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	if (copy_from_user(range, (void __user *)arg, sizeof(range)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 		return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	start = range[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	len = range[1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	if (start & 511)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	if (len & 511)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	if (start + len > i_size_read(bdev->bd_inode))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	err = truncate_bdev_range(bdev, mode, start, start + len - 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 		return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	return blkdev_issue_discard(bdev, start >> 9, len >> 9,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 				    GFP_KERNEL, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) static int blk_ioctl_zeroout(struct block_device *bdev, fmode_t mode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 		unsigned long arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 	uint64_t range[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 	uint64_t start, end, len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 	if (!(mode & FMODE_WRITE))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 		return -EBADF;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 	if (copy_from_user(range, (void __user *)arg, sizeof(range)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 		return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	start = range[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 	len = range[1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 	end = start + len - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 	if (start & 511)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 	if (len & 511)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 	if (end >= (uint64_t)i_size_read(bdev->bd_inode))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 	if (end < start)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	/* Invalidate the page cache, including dirty pages */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 	err = truncate_bdev_range(bdev, mode, start, end);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 		return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 	return blkdev_issue_zeroout(bdev, start >> 9, len >> 9, GFP_KERNEL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 			BLKDEV_ZERO_NOUNMAP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) static int put_ushort(unsigned short __user *argp, unsigned short val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	return put_user(val, argp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) static int put_int(int __user *argp, int val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	return put_user(val, argp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) static int put_uint(unsigned int __user *argp, unsigned int val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	return put_user(val, argp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) static int put_long(long __user *argp, long val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	return put_user(val, argp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) static int put_ulong(unsigned long __user *argp, unsigned long val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 	return put_user(val, argp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) static int put_u64(u64 __user *argp, u64 val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 	return put_user(val, argp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) #ifdef CONFIG_COMPAT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) static int compat_put_long(compat_long_t __user *argp, long val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 	return put_user(val, argp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) static int compat_put_ulong(compat_ulong_t __user *argp, compat_ulong_t val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 	return put_user(val, argp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) int __blkdev_driver_ioctl(struct block_device *bdev, fmode_t mode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 			unsigned cmd, unsigned long arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 	struct gendisk *disk = bdev->bd_disk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 	if (disk->fops->ioctl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 		return disk->fops->ioctl(bdev, mode, cmd, arg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 	return -ENOTTY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242)  * For the record: _GPL here is only because somebody decided to slap it
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243)  * on the previous export.  Sheer idiocy, since it wasn't copyrightable
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244)  * at all and could be open-coded without any exports by anybody who cares.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) EXPORT_SYMBOL_GPL(__blkdev_driver_ioctl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) #ifdef CONFIG_COMPAT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250)  * This is the equivalent of compat_ptr_ioctl(), to be used by block
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251)  * drivers that implement only commands that are completely compatible
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252)  * between 32-bit and 64-bit user space
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) int blkdev_compat_ptr_ioctl(struct block_device *bdev, fmode_t mode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 			unsigned cmd, unsigned long arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 	struct gendisk *disk = bdev->bd_disk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 	if (disk->fops->ioctl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 		return disk->fops->ioctl(bdev, mode, cmd,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 					 (unsigned long)compat_ptr(arg));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 	return -ENOIOCTLCMD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) EXPORT_SYMBOL(blkdev_compat_ptr_ioctl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) static int blkdev_pr_register(struct block_device *bdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 		struct pr_registration __user *arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 	const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 	struct pr_registration reg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 	if (!capable(CAP_SYS_ADMIN))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 		return -EPERM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 	if (!ops || !ops->pr_register)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 		return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 	if (copy_from_user(&reg, arg, sizeof(reg)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 		return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 	if (reg.flags & ~PR_FL_IGNORE_KEY)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 		return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 	return ops->pr_register(bdev, reg.old_key, reg.new_key, reg.flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) static int blkdev_pr_reserve(struct block_device *bdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 		struct pr_reservation __user *arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 	const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 	struct pr_reservation rsv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 	if (!capable(CAP_SYS_ADMIN))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 		return -EPERM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 	if (!ops || !ops->pr_reserve)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 		return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 	if (copy_from_user(&rsv, arg, sizeof(rsv)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 		return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 	if (rsv.flags & ~PR_FL_IGNORE_KEY)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 		return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 	return ops->pr_reserve(bdev, rsv.key, rsv.type, rsv.flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) static int blkdev_pr_release(struct block_device *bdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 		struct pr_reservation __user *arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 	const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 	struct pr_reservation rsv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 	if (!capable(CAP_SYS_ADMIN))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 		return -EPERM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 	if (!ops || !ops->pr_release)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) 		return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) 	if (copy_from_user(&rsv, arg, sizeof(rsv)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) 		return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 	if (rsv.flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 		return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 	return ops->pr_release(bdev, rsv.key, rsv.type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) static int blkdev_pr_preempt(struct block_device *bdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) 		struct pr_preempt __user *arg, bool abort)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) 	const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 	struct pr_preempt p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) 	if (!capable(CAP_SYS_ADMIN))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) 		return -EPERM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) 	if (!ops || !ops->pr_preempt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) 		return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) 	if (copy_from_user(&p, arg, sizeof(p)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) 		return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) 	if (p.flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) 		return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) 	return ops->pr_preempt(bdev, p.old_key, p.new_key, p.type, abort);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) static int blkdev_pr_clear(struct block_device *bdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) 		struct pr_clear __user *arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) 	const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) 	struct pr_clear c;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) 	if (!capable(CAP_SYS_ADMIN))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) 		return -EPERM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) 	if (!ops || !ops->pr_clear)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) 		return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) 	if (copy_from_user(&c, arg, sizeof(c)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) 		return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) 	if (c.flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) 		return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) 	return ops->pr_clear(bdev, c.key);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359)  * Is it an unrecognized ioctl? The correct returns are either
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360)  * ENOTTY (final) or ENOIOCTLCMD ("I don't know this one, try a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361)  * fallback"). ENOIOCTLCMD gets turned into ENOTTY by the ioctl
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362)  * code before returning.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364)  * Confused drivers sometimes return EINVAL, which is wrong. It
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365)  * means "I understood the ioctl command, but the parameters to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366)  * it were wrong".
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368)  * We should aim to just fix the broken drivers, the EINVAL case
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369)  * should go away.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) static inline int is_unrecognized_ioctl(int ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) 	return	ret == -EINVAL ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) 		ret == -ENOTTY ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) 		ret == -ENOIOCTLCMD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) static int blkdev_flushbuf(struct block_device *bdev, fmode_t mode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) 		unsigned cmd, unsigned long arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) 	if (!capable(CAP_SYS_ADMIN))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) 		return -EACCES;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) 	ret = __blkdev_driver_ioctl(bdev, mode, cmd, arg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) 	if (!is_unrecognized_ioctl(ret))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) 	fsync_bdev(bdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) 	invalidate_bdev(bdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) static int blkdev_roset(struct block_device *bdev, fmode_t mode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) 		unsigned cmd, unsigned long arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) 	int ret, n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) 	if (!capable(CAP_SYS_ADMIN))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) 		return -EACCES;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) 	ret = __blkdev_driver_ioctl(bdev, mode, cmd, arg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) 	if (!is_unrecognized_ioctl(ret))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) 	if (get_user(n, (int __user *)arg))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) 		return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) 	set_device_ro(bdev, n);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) static int blkdev_getgeo(struct block_device *bdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) 		struct hd_geometry __user *argp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) 	struct gendisk *disk = bdev->bd_disk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) 	struct hd_geometry geo;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) 	if (!argp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) 	if (!disk->fops->getgeo)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) 		return -ENOTTY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) 	 * We need to set the startsect first, the driver may
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) 	 * want to override it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) 	memset(&geo, 0, sizeof(geo));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) 	geo.start = get_start_sect(bdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) 	ret = disk->fops->getgeo(bdev, &geo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) 	if (copy_to_user(argp, &geo, sizeof(geo)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) 		return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) #ifdef CONFIG_COMPAT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) struct compat_hd_geometry {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) 	unsigned char heads;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) 	unsigned char sectors;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) 	unsigned short cylinders;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) 	u32 start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) static int compat_hdio_getgeo(struct block_device *bdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) 			      struct compat_hd_geometry __user *ugeo)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) 	struct gendisk *disk = bdev->bd_disk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) 	struct hd_geometry geo;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) 	if (!ugeo)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) 	if (!disk->fops->getgeo)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) 		return -ENOTTY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) 	memset(&geo, 0, sizeof(geo));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) 	 * We need to set the startsect first, the driver may
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) 	 * want to override it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) 	geo.start = get_start_sect(bdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) 	ret = disk->fops->getgeo(bdev, &geo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) 	ret = copy_to_user(ugeo, &geo, 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) 	ret |= put_user(geo.start, &ugeo->start);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) 		ret = -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) /* set the logical block size */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) static int blkdev_bszset(struct block_device *bdev, fmode_t mode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) 		int __user *argp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) 	int ret, n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) 	if (!capable(CAP_SYS_ADMIN))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) 		return -EACCES;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) 	if (!argp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) 	if (get_user(n, argp))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) 		return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) 	if (mode & FMODE_EXCL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) 		return set_blocksize(bdev, n);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) 	if (IS_ERR(blkdev_get_by_dev(bdev->bd_dev, mode | FMODE_EXCL, &bdev)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) 		return -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) 	ret = set_blocksize(bdev, n);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) 	blkdev_put(bdev, mode | FMODE_EXCL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502)  * Common commands that are handled the same way on native and compat
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503)  * user space. Note the separate arg/argp parameters that are needed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504)  * to deal with the compat_ptr() conversion.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) static int blkdev_common_ioctl(struct block_device *bdev, fmode_t mode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) 				unsigned cmd, unsigned long arg, void __user *argp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) 	unsigned int max_sectors;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) 	switch (cmd) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) 	case BLKFLSBUF:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) 		return blkdev_flushbuf(bdev, mode, cmd, arg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) 	case BLKROSET:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) 		return blkdev_roset(bdev, mode, cmd, arg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) 	case BLKDISCARD:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) 		return blk_ioctl_discard(bdev, mode, arg, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) 	case BLKSECDISCARD:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) 		return blk_ioctl_discard(bdev, mode, arg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) 				BLKDEV_DISCARD_SECURE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) 	case BLKZEROOUT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) 		return blk_ioctl_zeroout(bdev, mode, arg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) 	case BLKREPORTZONE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) 		return blkdev_report_zones_ioctl(bdev, mode, cmd, arg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) 	case BLKRESETZONE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) 	case BLKOPENZONE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) 	case BLKCLOSEZONE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) 	case BLKFINISHZONE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) 		return blkdev_zone_mgmt_ioctl(bdev, mode, cmd, arg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) 	case BLKGETZONESZ:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) 		return put_uint(argp, bdev_zone_sectors(bdev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) 	case BLKGETNRZONES:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) 		return put_uint(argp, blkdev_nr_zones(bdev->bd_disk));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) 	case BLKROGET:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) 		return put_int(argp, bdev_read_only(bdev) != 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) 	case BLKSSZGET: /* get block device logical block size */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) 		return put_int(argp, bdev_logical_block_size(bdev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) 	case BLKPBSZGET: /* get block device physical block size */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) 		return put_uint(argp, bdev_physical_block_size(bdev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) 	case BLKIOMIN:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) 		return put_uint(argp, bdev_io_min(bdev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) 	case BLKIOOPT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) 		return put_uint(argp, bdev_io_opt(bdev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) 	case BLKALIGNOFF:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) 		return put_int(argp, bdev_alignment_offset(bdev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) 	case BLKDISCARDZEROES:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) 		return put_uint(argp, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) 	case BLKSECTGET:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) 		max_sectors = min_t(unsigned int, USHRT_MAX,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) 				    queue_max_sectors(bdev_get_queue(bdev)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) 		return put_ushort(argp, max_sectors);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) 	case BLKROTATIONAL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) 		return put_ushort(argp, !blk_queue_nonrot(bdev_get_queue(bdev)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) 	case BLKRASET:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) 	case BLKFRASET:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) 		if(!capable(CAP_SYS_ADMIN))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) 			return -EACCES;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) 		bdev->bd_bdi->ra_pages = (arg * 512) / PAGE_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) 	case BLKRRPART:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) 		return blkdev_reread_part(bdev, mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) 	case BLKTRACESTART:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) 	case BLKTRACESTOP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) 	case BLKTRACETEARDOWN:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) 		return blk_trace_ioctl(bdev, cmd, argp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) 	case IOC_PR_REGISTER:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) 		return blkdev_pr_register(bdev, argp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) 	case IOC_PR_RESERVE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) 		return blkdev_pr_reserve(bdev, argp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) 	case IOC_PR_RELEASE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) 		return blkdev_pr_release(bdev, argp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) 	case IOC_PR_PREEMPT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) 		return blkdev_pr_preempt(bdev, argp, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) 	case IOC_PR_PREEMPT_ABORT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) 		return blkdev_pr_preempt(bdev, argp, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) 	case IOC_PR_CLEAR:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) 		return blkdev_pr_clear(bdev, argp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) 		return -ENOIOCTLCMD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584)  * Always keep this in sync with compat_blkdev_ioctl()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585)  * to handle all incompatible commands in both functions.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587)  * New commands must be compatible and go into blkdev_common_ioctl
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) int blkdev_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) 			unsigned long arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) 	loff_t size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) 	void __user *argp = (void __user *)arg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) 	switch (cmd) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) 	/* These need separate implementations for the data structure */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) 	case HDIO_GETGEO:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) 		return blkdev_getgeo(bdev, argp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) 	case BLKPG:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) 		return blkpg_ioctl(bdev, argp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) 	/* Compat mode returns 32-bit data instead of 'long' */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) 	case BLKRAGET:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) 	case BLKFRAGET:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) 		if (!argp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) 			return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) 		return put_long(argp, (bdev->bd_bdi->ra_pages*PAGE_SIZE) / 512);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) 	case BLKGETSIZE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) 		size = i_size_read(bdev->bd_inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) 		if ((size >> 9) > ~0UL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) 			return -EFBIG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) 		return put_ulong(argp, size >> 9);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) 	/* The data is compatible, but the command number is different */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) 	case BLKBSZGET: /* get block device soft block size (cf. BLKSSZGET) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) 		return put_int(argp, block_size(bdev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) 	case BLKBSZSET:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) 		return blkdev_bszset(bdev, mode, argp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) 	case BLKGETSIZE64:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) 		return put_u64(argp, i_size_read(bdev->bd_inode));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) 	/* Incompatible alignment on i386 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) 	case BLKTRACESETUP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) 		return blk_trace_ioctl(bdev, cmd, argp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) 	ret = blkdev_common_ioctl(bdev, mode, cmd, arg, argp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) 	if (ret == -ENOIOCTLCMD)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) 		return __blkdev_driver_ioctl(bdev, mode, cmd, arg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) EXPORT_SYMBOL_GPL(blkdev_ioctl); /* for /dev/raw */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) #ifdef CONFIG_COMPAT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) #define BLKBSZGET_32		_IOR(0x12, 112, int)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) #define BLKBSZSET_32		_IOW(0x12, 113, int)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) #define BLKGETSIZE64_32		_IOR(0x12, 114, int)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) /* Most of the generic ioctls are handled in the normal fallback path.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645)    This assumes the blkdev's low level compat_ioctl always returns
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646)    ENOIOCTLCMD for unknown ioctls. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) 	void __user *argp = compat_ptr(arg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) 	struct inode *inode = file->f_mapping->host;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) 	struct block_device *bdev = inode->i_bdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) 	struct gendisk *disk = bdev->bd_disk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) 	fmode_t mode = file->f_mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) 	loff_t size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) 	 * O_NDELAY can be altered using fcntl(.., F_SETFL, ..), so we have
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) 	 * to updated it before every ioctl.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) 	if (file->f_flags & O_NDELAY)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) 		mode |= FMODE_NDELAY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) 		mode &= ~FMODE_NDELAY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) 	switch (cmd) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) 	/* These need separate implementations for the data structure */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) 	case HDIO_GETGEO:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) 		return compat_hdio_getgeo(bdev, argp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) 	case BLKPG:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) 		return compat_blkpg_ioctl(bdev, argp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) 	/* Compat mode returns 32-bit data instead of 'long' */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) 	case BLKRAGET:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) 	case BLKFRAGET:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) 		if (!argp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) 			return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) 		return compat_put_long(argp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) 			       (bdev->bd_bdi->ra_pages * PAGE_SIZE) / 512);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) 	case BLKGETSIZE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681) 		size = i_size_read(bdev->bd_inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) 		if ((size >> 9) > ~0UL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) 			return -EFBIG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) 		return compat_put_ulong(argp, size >> 9);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) 	/* The data is compatible, but the command number is different */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) 	case BLKBSZGET_32: /* get the logical block size (cf. BLKSSZGET) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) 		return put_int(argp, bdev_logical_block_size(bdev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) 	case BLKBSZSET_32:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) 		return blkdev_bszset(bdev, mode, argp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) 	case BLKGETSIZE64_32:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) 		return put_u64(argp, i_size_read(bdev->bd_inode));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) 	/* Incompatible alignment on i386 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) 	case BLKTRACESETUP32:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) 		return blk_trace_ioctl(bdev, cmd, argp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) 	ret = blkdev_common_ioctl(bdev, mode, cmd, arg, argp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) 	if (ret == -ENOIOCTLCMD && disk->fops->compat_ioctl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) 		ret = disk->fops->compat_ioctl(bdev, mode, cmd, arg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) #endif