From 2f0a24917b222ff6310e654ba543efa38b1b753a Mon Sep 17 00:00:00 2001
From: Kent Overstreet <kmo@daterainc.com>
Date: Thu, 15 Jan 2015 09:33:48 +0000
Subject: [PATCH] update for bcache header changes

Change-Id: I5c64d438dac8bc28411f9a25e1be711477a3af80
---
 bcache.c    |  9 ++-------
 bcache.h    | 17 ++++++++++++++++-
 bcacheadm.c |  2 +-
 3 files changed, 19 insertions(+), 9 deletions(-)

diff --git a/bcache.c b/bcache.c
index 4bdbc6e8..6fce6980 100644
--- a/bcache.c
+++ b/bcache.c
@@ -434,7 +434,7 @@ unsigned hatoi_validate(const char *s, const char *msg)
 static void do_write_sb(int fd, struct cache_sb *sb)
 {
 	char zeroes[SB_START] = {0};
-	size_t bytes = ((void *) bset_bkey_last(sb)) - (void *) sb;
+	size_t bytes = ((void *) __bset_bkey_last(sb)) - (void *) sb;
 
 	/* Zero start of disk */
 	if (pwrite(fd, zeroes, SB_START, 0) != SB_START) {
@@ -807,11 +807,6 @@ void show_super_backingdev(struct cache_sb *sb, bool force_csum)
 	if (sb->version == BCACHE_SB_VERSION_BDEV) {
 		first_sector = BDEV_DATA_START_DEFAULT;
 	} else {
-		if (sb->keys == 1 || sb->d[0]) {
-			fprintf(stderr,
-				"Possible experimental format detected, bailing\n");
-			exit(3);
-		}
 		first_sector = sb->data_offset;
 	}
 
@@ -825,7 +820,7 @@ void show_super_backingdev(struct cache_sb *sb, bool force_csum)
 
 static void show_cache_member(struct cache_sb *sb, unsigned i)
 {
-	struct cache_member *m = ((struct cache_member *) sb->d) + i;
+	struct cache_member *m = sb->members + i;
 
 	printf("cache.state\t%s\n",		cache_state[CACHE_STATE(m)]);
 
diff --git a/bcache.h b/bcache.h
index d409ee26..4a3eff9e 100644
--- a/bcache.h
+++ b/bcache.h
@@ -30,6 +30,21 @@ typedef __s64	s64;
 	(void) (&_max1 == &_max2);		\
 	_max1 > _max2 ? _max1 : _max2; })
 
+#define __bkey_idx(_set, _offset)				\
+	((_set)->_data + (_offset))
+
+#define bkey_idx(_set, _offset)					\
+	((typeof(&(_set)->start[0])) __bkey_idx((_set), (_offset)))
+
+#define bkey_next(_k)						\
+	((typeof(_k)) __bkey_idx(_k, (_k)->u64s))
+
+#define __bset_bkey_last(_set)					\
+	 __bkey_idx((_set), (_set)->keys)
+
+#define bset_bkey_last(_set)					\
+	 bkey_idx((_set), (_set)->keys)
+
 extern const char * const cache_state[];
 extern const char * const replacement_policies[];
 extern const char * const csum_types[];
@@ -115,7 +130,7 @@ char *device_set_failed(const char *dev_uuid);
 #define csum_set(i, type)						\
 ({									\
 	void *start = ((void *) (i)) + sizeof(uint64_t);		\
-	void *end = bset_bkey_last(i);					\
+	void *end = __bset_bkey_last(i);				\
 									\
 	bch_checksum(type, start, end - start);				\
 })
diff --git a/bcacheadm.c b/bcacheadm.c
index e92acbd8..0e4a873f 100644
--- a/bcacheadm.c
+++ b/bcacheadm.c
@@ -653,7 +653,7 @@ int bcache_status(NihCommand *command, char *const *args)
 
 	for (i = 0; i < seq_sb->nr_in_set; i++) {
 		char uuid_str[40];
-		struct cache_member *m = ((struct cache_member *) seq_sb->d) + i;
+		struct cache_member *m = seq_sb->members + i;
 		char dev_state[32];
 		int j;