fscrypt: pass a byte offset to fscrypt_zeroout_range_inline_crypt

Logical offsets into an inode are usually expressed as bytes in the VFS.
Switch fscrypt_zeroout_range_inline_crypt to that convention.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20260302141922.370070-10-hch@lst.de
Signed-off-by: Eric Biggers <ebiggers@kernel.org>

Author: Christoph Hellwig

fs/crypto/bio.c

@@ -70,12 +70,11 @@ static void fscrypt_zeroout_range_end_io(struct bio *bio)
 }
 
 static int fscrypt_zeroout_range_inline_crypt(const struct inode *inode,
-					      pgoff_t lblk, sector_t sector,
+					      loff_t pos, sector_t sector,
 					      unsigned int len)
 {
 	const unsigned int blockbits = inode->i_blkbits;
 	const unsigned int blocks_per_page = 1 << (PAGE_SHIFT - blockbits);
-	loff_t pos = (loff_t)lblk << blockbits;
 	struct fscrypt_zero_done done = {
 		.pending	= ATOMIC_INIT(1),
 		.done		= COMPLETION_INITIALIZER_ONSTACK(done.done),
@@ -142,6 +141,7 @@ int fscrypt_zeroout_range(const struct inode *inode, pgoff_t lblk,
 	const unsigned int du_per_page = 1U << du_per_page_bits;
 	u64 du_index = (u64)lblk << (inode->i_blkbits - du_bits);
 	u64 du_remaining = (u64)len << (inode->i_blkbits - du_bits);
+	loff_t pos = (loff_t)lblk << inode->i_blkbits;
 	sector_t sector = pblk << (inode->i_blkbits - SECTOR_SHIFT);
 	struct page *pages[16]; /* write up to 16 pages at a time */
 	unsigned int nr_pages;
@@ -154,7 +154,7 @@ int fscrypt_zeroout_range(const struct inode *inode, pgoff_t lblk,
 		return 0;
 
 	if (fscrypt_inode_uses_inline_crypto(inode))
-		return fscrypt_zeroout_range_inline_crypt(inode, lblk, sector,
+		return fscrypt_zeroout_range_inline_crypt(inode, pos, sector,
 							  len);
 
 	BUILD_BUG_ON(ARRAY_SIZE(pages) > BIO_MAX_VECS);