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ocfs2: Encode i_generation in the meta data lvb 

When i_generation is removed from the lockname, this will help us determine
whether a meta data lvb has information that is in sync with the local
struct inode.

Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
This commit is contained in:
Mark Fasheh 2006-09-12 15:35:49 -07:00
parent 4d3b83f736
commit f9e2d82e63
2 changed files with 12 additions and 7 deletions
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14
fs/ocfs2/dlmglue.c
View File

@ -1427,6 +1427,7 @@ static void __ocfs2_stuff_meta_lvb(struct inode *inode)
lvb->lvb_imtime_packed =
cpu_to_be64(ocfs2_pack_timespec(&inode->i_mtime));
lvb->lvb_iattr = cpu_to_be32(oi->ip_attr);
lvb->lvb_igeneration = cpu_to_be32(inode->i_generation);
mlog_meta_lvb(0, lockres);
@ -1482,11 +1483,13 @@ static void ocfs2_refresh_inode_from_lvb(struct inode *inode)
mlog_exit_void();
}
static inline int ocfs2_meta_lvb_is_trustable(struct ocfs2_lock_res *lockres)
static inline int ocfs2_meta_lvb_is_trustable(struct inode *inode,
struct ocfs2_lock_res *lockres)
{
struct ocfs2_meta_lvb *lvb = (struct ocfs2_meta_lvb *) lockres->l_lksb.lvb;
if (lvb->lvb_version == OCFS2_LVB_VERSION)
if (lvb->lvb_version == OCFS2_LVB_VERSION
&& be32_to_cpu(lvb->lvb_igeneration) == inode->i_generation)
return 1;
return 0;
}
@ -1583,7 +1586,7 @@ static int ocfs2_meta_lock_update(struct inode *inode,
* map (directories, bitmap files, etc) */
ocfs2_extent_map_trunc(inode, 0);
if (ocfs2_meta_lvb_is_trustable(lockres)) {
if (ocfs2_meta_lvb_is_trustable(inode, lockres)) {
mlog(0, "Trusting LVB on inode %llu\n",
(unsigned long long)oi->ip_blkno);
ocfs2_refresh_inode_from_lvb(inode);
@ -3166,8 +3169,9 @@ 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",
lvb->lvb_version, be32_to_cpu(lvb->lvb_iclusters));
mlog(level, "version: %u, clusters: %u, generation: 0x%x\n",
lvb->lvb_version, be32_to_cpu(lvb->lvb_iclusters),
be32_to_cpu(lvb->lvb_igeneration));
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),

5
fs/ocfs2/dlmglue.h
View File

@ -29,7 +29,7 @@
#include "dcache.h"
#define OCFS2_LVB_VERSION 3
#define OCFS2_LVB_VERSION 4
struct ocfs2_meta_lvb {
__be16 lvb_reserved0;
@ -45,7 +45,8 @@ struct ocfs2_meta_lvb {
__be16 lvb_imode;
__be16 lvb_inlink;
__be32 lvb_iattr;
__be32 lvb_reserved[2];
__be32 lvb_igeneration;
__be32 lvb_reserved2;
};
/* ocfs2_meta_lock_full() and ocfs2_data_lock_full() 'arg_flags' flags */