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block: add a bdev_discard_granularity helper

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Abstract away implementation details from file systems by providing a
block_device based helper to retrieve the discard granularity.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Acked-by: Christoph Böhmwalder <christoph.boehmwalder@linbit.com> [drbd]
Acked-by: Ryusuke Konishi <konishi.ryusuke@gmail.com>
Acked-by: David Sterba <dsterba@suse.com> [btrfs]
Link: https://lore.kernel.org/r/20220415045258.199825-26-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
This commit is contained in:
Christoph Hellwig 2022-07-21 11:40:30 +09:00 • committed by Namjae Jeon
commit d196c9a44b
1 changed files with 7 additions and 0 deletions
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7
file.c
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@ -372,7 +372,9 @@ out:
static int exfat_ioctl_fitrim(struct inode *inode, unsigned long arg)
{
#if LINUX_VERSION_CODE < KERNEL_VERSION(5, 19, 0)
struct request_queue *q = bdev_get_queue(inode->i_sb->s_bdev);
#endif
struct fstrim_range range;
int ret = 0;
@ -389,8 +391,13 @@ static int exfat_ioctl_fitrim(struct inode *inode, unsigned long arg)
if (copy_from_user(&range, (struct fstrim_range __user *)arg, sizeof(range)))
return -EFAULT;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 19, 0)
range.minlen = max_t(unsigned int, range.minlen,
bdev_discard_granularity(inode->i_sb->s_bdev));
#else
range.minlen = max_t(unsigned int, range.minlen,
q->limits.discard_granularity);
#endif
ret = exfat_trim_fs(inode, &range);
if (ret < 0)