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authorTrond Myklebust <Trond.Myklebust@netapp.com>2007-10-01 18:57:50 -0400
committerTrond Myklebust <Trond.Myklebust@netapp.com>2007-10-09 17:19:55 -0400
commit6d2b2966869142660f46d1e06cf9d15c3debcf77 (patch)
tree21520382d3ca7ac3720bcf84dd76a1c3fb94331a /fs/nfs/inode.c
parent60ccd4ec4170c9487e3792322626acd160197bce (diff)
NFS: Reset nfsi->last_updated only if the attribute changed
Otherwise set it to nfsi->read_cache_jiffies in order to prevent jiffy wraparound issues. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/nfs/inode.c')
-rw-r--r--fs/nfs/inode.c17
1 files changed, 12 insertions, 5 deletions
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index 1c23d3a67c8..9d012a6ee4c 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -956,7 +956,6 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
* Update the read time so we don't revalidate too often.
*/
nfsi->read_cache_jiffies = fattr->time_start;
- nfsi->last_updated = now;
nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ATIME
| NFS_INO_REVAL_PAGECACHE);
@@ -1027,10 +1026,18 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE);
nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
nfsi->attrtimeo_timestamp = now;
- } else if (!time_in_range(now, nfsi->attrtimeo_timestamp, nfsi->attrtimeo_timestamp + nfsi->attrtimeo)) {
- if ((nfsi->attrtimeo <<= 1) > NFS_MAXATTRTIMEO(inode))
- nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode);
- nfsi->attrtimeo_timestamp = now;
+ nfsi->last_updated = now;
+ } else {
+ if (!time_in_range(now, nfsi->attrtimeo_timestamp, nfsi->attrtimeo_timestamp + nfsi->attrtimeo)) {
+ if ((nfsi->attrtimeo <<= 1) > NFS_MAXATTRTIMEO(inode))
+ nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode);
+ nfsi->attrtimeo_timestamp = now;
+ }
+ /*
+ * Avoid jiffy wraparound issues with nfsi->last_updated
+ */
+ if (!time_in_range(nfsi->last_updated, nfsi->read_cache_jiffies, now))
+ nfsi->last_updated = nfsi->read_cache_jiffies;
}
invalid &= ~NFS_INO_INVALID_ATTR;
/* Don't invalidate the data if we were to blame */