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| author | Mark Fasheh <mark.fasheh@oracle.com> | 2006-09-12 15:35:49 -0700 |
|---|---|---|
| committer | Mark Fasheh <mark.fasheh@oracle.com> | 2006-09-24 13:50:45 -0700 |
| commit | f9e2d82e6395cfa0802446b54b63cc412089d82c (patch) | |
| tree | cdf647041c713d3cbc8b1e0d4006c9440184e336 /fs | |
| parent | 4d3b83f7364269b66cdda271f680bd99e77afd96 (diff) | |
| download | lwn-f9e2d82e6395cfa0802446b54b63cc412089d82c.tar.gz lwn-f9e2d82e6395cfa0802446b54b63cc412089d82c.zip | |
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>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/ocfs2/dlmglue.c | 14 | ||||
| -rw-r--r-- | fs/ocfs2/dlmglue.h | 5 |
2 files changed, 12 insertions, 7 deletions
diff --git a/fs/ocfs2/dlmglue.c b/fs/ocfs2/dlmglue.c index f80fb14ee815..6cd84dffbbf4 100644 --- a/fs/ocfs2/dlmglue.c +++ b/fs/ocfs2/dlmglue.c @@ -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), diff --git a/fs/ocfs2/dlmglue.h b/fs/ocfs2/dlmglue.h index 3476a1611341..45a74f44b688 100644 --- a/fs/ocfs2/dlmglue.h +++ b/fs/ocfs2/dlmglue.h @@ -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 */ |