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NFS: fix nfs_verify_change_attribute

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We always want to check that the verifier and directory
cache_change_attribute match. This also allows us to remove the 'wraparound
hack' for the cache_change_attribute. If we're only checking for equality,
then we don't care about wraparound issues.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Trond Myklebust 2007-09-28 14:20:12 -04:00
parent 68e8a70d3c
commit 7957c1418f
2 changed files with 1 additions and 5 deletions
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4
fs/nfs/inode.c
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@ -972,10 +972,6 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
nfsi->read_cache_jiffies = fattr->time_start;
nfsi->last_updated = now;
/* Fix a wraparound issue with nfsi->cache_change_attribute */
if (time_before(now, nfsi->cache_change_attribute))
nfsi->cache_change_attribute = now - 600*HZ;
/* Are we racing with known updates of the metadata on the server? */
data_stable = nfs_verify_change_attribute(inode, fattr->time_start);
nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ATIME

2
include/linux/nfs_fs.h
View File

@ -277,7 +277,7 @@ static inline long nfs_save_change_attribute(struct inode *inode)
static inline int nfs_verify_change_attribute(struct inode *inode, unsigned long chattr)
{
return !nfs_caches_unstable(inode)
&& time_after_eq(chattr, NFS_I(inode)->cache_change_attribute);
&& chattr == NFS_I(inode)->cache_change_attribute;
}
/*