dedup

commit 4a21ac05f96b79113658a5adc1c04bde99bd8118
parent 1fc2fd3f5bb799b10a39ff687f8f44cc745173d4
Author: sin <sin@2f30.org>
Date:   Wed, 10 Apr 2019 13:42:56 +0100

Add a comment to clarify flags usage

Diffstat:
M
dedup.h
 | 
6
++++--

1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/dedup.h b/dedup.h
@@ -18,10 +18,12 @@
 #define VER_MIN	2
 #define VER_MAJ	0
 
+/* snapshot header and block header flags */
 #define VER_MIN_MASK	0xff
 #define VER_MAJ_SHIFT	8
 #define VER_MAJ_MASK	0xff
 
+/* block header flags */
 #define HASH_ALGO_SHIFT		19
 #define HASH_ALGO_MASK		0x7	/* max 8 hash algos */
 #define COMPR_ALGO_SHIFT	16
@@ -56,14 +58,14 @@ struct stats {
 };
 
 struct snap_hdr {
-	uint64_t flags;		/* bottom 16 bits are maj/min version */
+	uint64_t flags;
 	uint64_t size;		/* size of snapshots file */
 	uint64_t nr_snaps;
 	struct stats st;
 };
 
 struct blk_hdr {
-	uint64_t flags;		/* bottom 16 bits are maj/min version */
+	uint64_t flags;
 	uint64_t size;		/* size of store file */
 };