1 Upstream-Status: Inappropriate [Backport]
2 From c2cefc42ebf8e32e36b1866048a02a579f2cef9a Mon Sep 17 00:00:00 2001
3 From: Josef Bacik <josef@redhat.com>
4 Date: Thu, 9 Dec 2010 18:27:03 +0000
5 Subject: [PATCH 06/15] Btrfs-progs: update super fields for space cache
7 This patch updates the super field to add the cache_generation member. It also
8 makes us set it to -1 on mkfs so any new filesystem will get the space cache
9 stuff turned on. Thanks,
11 Signed-off-by: Josef Bacik <josef@redhat.com>
12 Signed-off-by: Chris Mason <chris.mason@oracle.com>
16 2 files changed, 6 insertions(+), 1 deletions(-)
18 diff --git a/ctree.h b/ctree.h
19 index b79e238..962c510 100644
22 @@ -340,8 +340,10 @@ struct btrfs_super_block {
24 char label[BTRFS_LABEL_SIZE];
26 + __le64 cache_generation;
28 /* future expansion */
29 - __le64 reserved[32];
30 + __le64 reserved[31];
31 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
32 } __attribute__ ((__packed__));
34 @@ -1564,6 +1566,8 @@ BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
36 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
38 +BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
39 + cache_generation, 64);
41 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
43 diff --git a/utils.c b/utils.c
44 index 2a15d86..35e17b8 100644
47 @@ -107,6 +107,7 @@ int make_btrfs(int fd, const char *device, const char *label,
48 btrfs_set_super_stripesize(&super, stripesize);
49 btrfs_set_super_csum_type(&super, BTRFS_CSUM_TYPE_CRC32);
50 btrfs_set_super_chunk_root_generation(&super, 1);
51 + btrfs_set_super_cache_generation(&super, -1);
53 strncpy(super.label, label, BTRFS_LABEL_SIZE - 1);