dm-integrity: rename internal_hash

Rename "internal_hash" to "internal_shash" and introduce a boolean value
"internal_hash".

Signed-off-by: Mikulas Patocka <[email protected]>

Author: Mikulas Patocka

drivers/md/dm-integrity.c

@@ -219,10 +219,11 @@ struct dm_integrity_c {
 	__u8 log2_blocks_per_bitmap_bit;
 
 	unsigned char mode;
+	bool internal_hash;
 
 	int failed;
 
-	struct crypto_shash *internal_hash;
+	struct crypto_shash *internal_shash;
 	unsigned int internal_hash_digestsize;
 
 	struct dm_target *ti;
@@ -1639,11 +1640,11 @@ static void integrity_sector_checksum(struct dm_integrity_c *ic, sector_t sector
 				      const char *data, unsigned offset, char *result)
 {
 	__le64 sector_le = cpu_to_le64(sector);
-	SHASH_DESC_ON_STACK(req, ic->internal_hash);
+	SHASH_DESC_ON_STACK(req, ic->internal_shash);
 	int r;
 	unsigned int digest_size;
 
-	req->tfm = ic->internal_hash;
+	req->tfm = ic->internal_shash;
 
 	r = crypto_shash_init(req);
 	if (unlikely(r < 0)) {
@@ -4708,12 +4709,14 @@ static int dm_integrity_ctr(struct dm_target *ti, unsigned int argc, char **argv
 		buffer_sectors = 1;
 	ic->log2_buffer_sectors = min((int)__fls(buffer_sectors), 31 - SECTOR_SHIFT);
 
-	r = get_mac(&ic->internal_hash, &ic->internal_hash_alg, &ti->error,
+	r = get_mac(&ic->internal_shash, &ic->internal_hash_alg, &ti->error,
 		    "Invalid internal hash", "Error setting internal hash key");
 	if (r)
 		goto bad;
-	if (ic->internal_hash)
-		ic->internal_hash_digestsize = crypto_shash_digestsize(ic->internal_hash);
+	if (ic->internal_shash) {
+		ic->internal_hash = true;
+		ic->internal_hash_digestsize = crypto_shash_digestsize(ic->internal_shash);
+	}
 
 	r = get_mac(&ic->journal_mac, &ic->journal_mac_alg, &ti->error,
 		    "Invalid journal mac", "Error setting journal mac key");
@@ -5235,8 +5238,8 @@ static void dm_integrity_dtr(struct dm_target *ti)
 	if (ic->sb)
 		free_pages_exact(ic->sb, SB_SECTORS << SECTOR_SHIFT);
 
-	if (ic->internal_hash)
-		crypto_free_shash(ic->internal_hash);
+	if (ic->internal_shash)
+		crypto_free_shash(ic->internal_shash);
 	free_alg(&ic->internal_hash_alg);
 
 	if (ic->journal_crypt)