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-rw-r--r--fs/crypto/crypto.c28
1 files changed, 15 insertions, 13 deletions
diff --git a/fs/crypto/crypto.c b/fs/crypto/crypto.c
index e78be66bbf01..bf642479269a 100644
--- a/fs/crypto/crypto.c
+++ b/fs/crypto/crypto.c
@@ -237,41 +237,43 @@ EXPORT_SYMBOL(fscrypt_encrypt_block_inplace);
/**
* fscrypt_decrypt_pagecache_blocks() - Decrypt filesystem blocks in a
- * pagecache page
- * @page: The locked pagecache page containing the block(s) to decrypt
+ * pagecache folio
+ * @folio: The locked pagecache folio containing the block(s) to decrypt
* @len: Total size of the block(s) to decrypt. Must be a nonzero
* multiple of the filesystem's block size.
- * @offs: Byte offset within @page of the first block to decrypt. Must be
+ * @offs: Byte offset within @folio of the first block to decrypt. Must be
* a multiple of the filesystem's block size.
*
- * The specified block(s) are decrypted in-place within the pagecache page,
- * which must still be locked and not uptodate. Normally, blocksize ==
- * PAGE_SIZE and the whole page is decrypted at once.
+ * The specified block(s) are decrypted in-place within the pagecache folio,
+ * which must still be locked and not uptodate.
*
* This is for use by the filesystem's ->readahead() method.
*
* Return: 0 on success; -errno on failure
*/
-int fscrypt_decrypt_pagecache_blocks(struct page *page, unsigned int len,
- unsigned int offs)
+int fscrypt_decrypt_pagecache_blocks(struct folio *folio, size_t len,
+ size_t offs)
{
- const struct inode *inode = page->mapping->host;
+ const struct inode *inode = folio->mapping->host;
const unsigned int blockbits = inode->i_blkbits;
const unsigned int blocksize = 1 << blockbits;
- u64 lblk_num = ((u64)page->index << (PAGE_SHIFT - blockbits)) +
+ u64 lblk_num = ((u64)folio->index << (PAGE_SHIFT - blockbits)) +
(offs >> blockbits);
- unsigned int i;
+ size_t i;
int err;
- if (WARN_ON_ONCE(!PageLocked(page)))
+ if (WARN_ON_ONCE(!folio_test_locked(folio)))
return -EINVAL;
if (WARN_ON_ONCE(len <= 0 || !IS_ALIGNED(len | offs, blocksize)))
return -EINVAL;
for (i = offs; i < offs + len; i += blocksize, lblk_num++) {
+ struct page *page = folio_page(folio, i >> PAGE_SHIFT);
+
err = fscrypt_crypt_block(inode, FS_DECRYPT, lblk_num, page,
- page, blocksize, i, GFP_NOFS);
+ page, blocksize, i & ~PAGE_MASK,
+ GFP_NOFS);
if (err)
return err;
}