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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>
master
Josef Bacik 2010-12-09 18:27:03 +00:00 committed by Chris Mason
parent 17cf679fb3
commit e2a6859d93
2 changed files with 6 additions and 1 deletions
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6
ctree.h
View File

@ -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)
{

1
utils.c
View File

@ -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);