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ocfs2: Free up some space in the lvb 

lvb_version doesn't need to be a whole 32 bits. Make it an 8 bit field to
free up some space. This should be backwards compatible until we use one of
the fields, in which case we'd bump the lvb version anyway.

Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
This commit is contained in:
Mark Fasheh 2006-09-12 15:22:18 -07:00
parent 0027dd5bc2
commit 4d3b83f736
2 changed files with 6 additions and 4 deletions
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6
fs/ocfs2/dlmglue.c
View File

@ -1413,7 +1413,7 @@ static void __ocfs2_stuff_meta_lvb(struct inode *inode)
lvb = (struct ocfs2_meta_lvb *) lockres->l_lksb.lvb;
lvb->lvb_version = cpu_to_be32(OCFS2_LVB_VERSION);
lvb->lvb_version = OCFS2_LVB_VERSION;
lvb->lvb_isize = cpu_to_be64(i_size_read(inode));
lvb->lvb_iclusters = cpu_to_be32(oi->ip_clusters);
lvb->lvb_iuid = cpu_to_be32(inode->i_uid);
@ -1486,7 +1486,7 @@ static inline int ocfs2_meta_lvb_is_trustable(struct ocfs2_lock_res *lockres)
{
struct ocfs2_meta_lvb *lvb = (struct ocfs2_meta_lvb *) lockres->l_lksb.lvb;
if (be32_to_cpu(lvb->lvb_version) == OCFS2_LVB_VERSION)
if (lvb->lvb_version == OCFS2_LVB_VERSION)
return 1;
return 0;
}
@ -3167,7 +3167,7 @@ void ocfs2_dump_meta_lvb_info(u64 level,
mlog(level, "LVB information for %s (called from %s:%u):\n",
lockres->l_name, function, line);
mlog(level, "version: %u, clusters: %u\n",
be32_to_cpu(lvb->lvb_version), be32_to_cpu(lvb->lvb_iclusters));
lvb->lvb_version, be32_to_cpu(lvb->lvb_iclusters));
mlog(level, "size: %llu, uid %u, gid %u, mode 0x%x\n",
(unsigned long long)be64_to_cpu(lvb->lvb_isize),
be32_to_cpu(lvb->lvb_iuid), be32_to_cpu(lvb->lvb_igid),

4
fs/ocfs2/dlmglue.h
View File

@ -32,7 +32,9 @@
#define OCFS2_LVB_VERSION 3
struct ocfs2_meta_lvb {
__be32 lvb_version;
__be16 lvb_reserved0;
__u8 lvb_reserved1;
__u8 lvb_version;
__be32 lvb_iclusters;
__be32 lvb_iuid;
__be32 lvb_igid;