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Upstream-Status: Inappropriate [Backport]
From c2cefc42ebf8e32e36b1866048a02a579f2cef9a Mon Sep 17 00:00:00 2001
From: Josef Bacik <josef@redhat.com>
Date: Thu, 9 Dec 2010 18:27:03 +0000
Subject: [PATCH 06/15] Btrfs-progs: update super fields for space cache
This patch updates the super field to add the cache_generation member. It also
makes us set it to -1 on mkfs so any new filesystem will get the space cache
stuff turned on. Thanks,
Signed-off-by: Josef Bacik <josef@redhat.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
---
ctree.h | 6 +++++-
utils.c | 1 +
2 files changed, 6 insertions(+), 1 deletions(-)
diff --git a/ctree.h b/ctree.h
index b79e238..962c510 100644
--- a/ctree.h
+++ b/ctree.h
@@ -340,8 +340,10 @@ struct btrfs_super_block {
char label[BTRFS_LABEL_SIZE];
+ __le64 cache_generation;
+
/* future expansion */
- __le64 reserved[32];
+ __le64 reserved[31];
u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
} __attribute__ ((__packed__));
@@ -1564,6 +1566,8 @@ BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
incompat_flags, 64);
BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
csum_type, 16);
+BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
+ cache_generation, 64);
static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
{
diff --git a/utils.c b/utils.c
index 2a15d86..35e17b8 100644
--- a/utils.c
+++ b/utils.c
@@ -107,6 +107,7 @@ int make_btrfs(int fd, const char *device, const char *label,
btrfs_set_super_stripesize(&super, stripesize);
btrfs_set_super_csum_type(&super, BTRFS_CSUM_TYPE_CRC32);
btrfs_set_super_chunk_root_generation(&super, 1);
+ btrfs_set_super_cache_generation(&super, -1);
if (label)
strncpy(super.label, label, BTRFS_LABEL_SIZE - 1);
--
1.7.2.3
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