Josef Bacik
2010-Dec-09 18:27 UTC
[PATCH] 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>
---
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 2f4c6e1..b890728 100644
--- a/utils.c
+++ b/utils.c
@@ -103,6 +103,7 @@ 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)
strcpy(super.label, label);
--
1.6.6.1
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