Lines Matching +full:block +full:- +full:offset

1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * NTFS block device I/O.
13  * ntfs_bdev_read - Read data directly from block device using bio
14  * @bdev:	block device to read from
16  * @start:	starting byte offset on the block device
19  * Reads @size bytes starting from byte offset @start directly from the block
23  * The @start offset must be sector-aligned (512 bytes). If it is not aligned,
24  * the function will return -EINVAL.
39 	if (start & (SECTOR_SIZE - 1))  in ntfs_bdev_read()
40 		return -EINVAL;  in ntfs_bdev_read()
49 	bio->bi_iter.bi_sector = sector;  in ntfs_bdev_read()
52 		added = bio_add_vmalloc_chunk(bio, data + done, size - done);  in ntfs_bdev_read()
56 			bio = bio_alloc(prev->bi_bdev,  in ntfs_bdev_read()
57 					bio_max_segs(DIV_ROUND_UP(size - done, PAGE_SIZE)),  in ntfs_bdev_read()
58 					prev->bi_opf, GFP_KERNEL);  in ntfs_bdev_read()
59 			bio->bi_iter.bi_sector = bio_end_sector(prev);  in ntfs_bdev_read()
75  * ntfs_bdev_write - Update block device contents via page cache
76  * @sb:		super block of the mounted NTFS filesystem
78  * @start:	starting byte offset on the block device
81  * Writes @size bytes from @buf to the block device (sb->s_bdev) starting
82  * at byte offset @start. The write is performed entirely through the page
83  * cache of the block device's address space.
88 	loff_t offset, end = start + size;  in ntfs_bdev_write()  local
102 		folio = read_mapping_folio(sb->s_bdev->bd_mapping, idx, NULL);  in ntfs_bdev_write()
108 		offset = (loff_t)idx << PAGE_SHIFT;  in ntfs_bdev_write()
109 		to = min_t(u32, end - offset, PAGE_SIZE);  in ntfs_bdev_write()
110 		len = to - from;  in ntfs_bdev_write()