NFS: Convert cache_change_attribute into a jiffy-based value

 Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index 65d5ab4..449df8c 100644 (file)
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -1135,7 +1135,7 @@ __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
         * We may need to keep the attributes marked as invalid if
         * we raced with nfs_end_attr_update().
         */
-       if (verifier == nfsi->cache_change_attribute)
+       if (time_after_eq(verifier, nfsi->cache_change_attribute))
                nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ATIME);
        spin_unlock(&inode->i_lock);
 
@@ -1202,7 +1202,7 @@ void nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping)
                if (S_ISDIR(inode->i_mode)) {
                        memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf));
                        /* This ensures we revalidate child dentries */
-                       nfsi->cache_change_attribute++;
+                       nfsi->cache_change_attribute = jiffies;
                }
                spin_unlock(&inode->i_lock);
 
@@ -1242,7 +1242,7 @@ void nfs_end_data_update(struct inode *inode)
                        nfsi->cache_validity |= NFS_INO_INVALID_DATA;
                spin_unlock(&inode->i_lock);
        }
-       nfsi->cache_change_attribute ++;
+       nfsi->cache_change_attribute = jiffies;
        atomic_dec(&nfsi->data_updates);
 }
 
@@ -1391,7 +1391,7 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr, unsign
                /* Do we perhaps have any outstanding writes? */
                if (nfsi->npages == 0) {
                        /* No, but did we race with nfs_end_data_update()? */
-                       if (verifier  ==  nfsi->cache_change_attribute) {
+                       if (time_after_eq(verifier,  nfsi->cache_change_attribute)) {
                                inode->i_size = new_isize;
                                invalid |= NFS_INO_INVALID_DATA;
                        }

diff --git a/include/linux/nfs_fs.h b/include/linux/nfs_fs.h
index 8120fd6..abf890f 100644 (file)
--- a/include/linux/nfs_fs.h
+++ b/include/linux/nfs_fs.h
@@ -280,7 +280,7 @@ 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)
-               && chattr == NFS_I(inode)->cache_change_attribute;
+               && time_after_eq(chattr, NFS_I(inode)->cache_change_attribute);
 }
 
 /*