Upstream-Status: Inappropriate [Backport] From c2cefc42ebf8e32e36b1866048a02a579f2cef9a Mon Sep 17 00:00:00 2001 From: Josef Bacik 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 Signed-off-by: Chris Mason --- 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