fsverity: Remove inode parameter from fsverity_hash_block()

Due to the conversion from crypto_shash to the library API,
fsverity_hash_block() can no longer fail.  Therefore, the inode
parameter, which was used only to print an error message in the case of
a failure, is no longer necessary.  Remove it.

Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/20250915160819.140019-6-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@kernel.org>

Author: Eric Biggers

fs/verity/enable.c

@@ -19,8 +19,7 @@ struct block_buffer {
 };
 
 /* Hash a block, writing the result to the next level's pending block buffer. */
-static int hash_one_block(struct inode *inode,
-			  const struct merkle_tree_params *params,
+static int hash_one_block(const struct merkle_tree_params *params,
 			  struct block_buffer *cur)
 {
 	struct block_buffer *next = cur + 1;
@@ -36,8 +35,7 @@ static int hash_one_block(struct inode *inode,
 	/* Zero-pad the block if it's shorter than the block size. */
 	memset(&cur->data[cur->filled], 0, params->block_size - cur->filled);
 
-	fsverity_hash_block(params, inode, cur->data,
-			    &next->data[next->filled]);
+	fsverity_hash_block(params, cur->data, &next->data[next->filled]);
 	next->filled += params->digest_size;
 	cur->filled = 0;
 	return 0;
@@ -123,7 +121,7 @@ static int build_merkle_tree(struct file *filp,
 			fsverity_err(inode, "Short read of file data");
 			goto out;
 		}
-		err = hash_one_block(inode, params, &buffers[-1]);
+		err = hash_one_block(params, &buffers[-1]);
 		if (err)
 			goto out;
 		for (level = 0; level < num_levels; level++) {
@@ -134,7 +132,7 @@ static int build_merkle_tree(struct file *filp,
 			}
 			/* Next block at @level is full */
 
-			err = hash_one_block(inode, params, &buffers[level]);
+			err = hash_one_block(params, &buffers[level]);
 			if (err)
 				goto out;
 			err = write_merkle_tree_block(inode,
@@ -154,7 +152,7 @@ static int build_merkle_tree(struct file *filp,
 	/* Finish all nonempty pending tree blocks. */
 	for (level = 0; level < num_levels; level++) {
 		if (buffers[level].filled != 0) {
-			err = hash_one_block(inode, params, &buffers[level]);
+			err = hash_one_block(params, &buffers[level]);
 			if (err)
 				goto out;
 			err = write_merkle_tree_block(inode,

fs/verity/fsverity_private.h

@@ -90,7 +90,7 @@ union fsverity_hash_ctx *
 fsverity_prepare_hash_state(const struct fsverity_hash_alg *alg,
 			    const u8 *salt, size_t salt_size);
 void fsverity_hash_block(const struct merkle_tree_params *params,
-			 const struct inode *inode, const void *data, u8 *out);
+			 const void *data, u8 *out);
 void fsverity_hash_buffer(const struct fsverity_hash_alg *alg,
 			  const void *data, size_t size, u8 *out);
 void __init fsverity_check_hash_algs(void);

fs/verity/hash_algs.c

@@ -94,15 +94,14 @@ fsverity_prepare_hash_state(const struct fsverity_hash_alg *alg,
 /**
  * fsverity_hash_block() - hash a single data or hash block
  * @params: the Merkle tree's parameters
- * @inode: inode for which the hashing is being done
  * @data: virtual address of a buffer containing the block to hash
  * @out: output digest, size 'params->digest_size' bytes
  *
  * Hash a single data or hash block.  The hash is salted if a salt is specified
  * in the Merkle tree parameters.
  */
 void fsverity_hash_block(const struct merkle_tree_params *params,
-			 const struct inode *inode, const void *data, u8 *out)
+			 const void *data, u8 *out)
 {
 	union fsverity_hash_ctx ctx;
 

fs/verity/verify.c

@@ -202,7 +202,7 @@ verify_data_block(struct inode *inode, struct fsverity_info *vi,
 		unsigned long hblock_idx = hblocks[level - 1].index;
 		unsigned int hoffset = hblocks[level - 1].hoffset;
 
-		fsverity_hash_block(params, inode, haddr, real_hash);
+		fsverity_hash_block(params, haddr, real_hash);
 		if (memcmp(want_hash, real_hash, hsize) != 0)
 			goto corrupted;
 		/*
@@ -221,7 +221,7 @@ verify_data_block(struct inode *inode, struct fsverity_info *vi,
 	}
 
 	/* Finally, verify the data block. */
-	fsverity_hash_block(params, inode, data, real_hash);
+	fsverity_hash_block(params, data, real_hash);
 	if (memcmp(want_hash, real_hash, hsize) != 0)
 		goto corrupted;
 	return true;