NFS: Fix up inode attribute revalidation timeouts

The inode is considered revalidated when we've checked the value of the
change attribute against our cached value since that suffices to
establish whether or not the other cached values are valid.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>

fs/nfs/inode.c

@@ -2066,24 +2066,22 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
 	} else {
 		nfsi->cache_validity |=
 			save_cache_validity & NFS_INO_INVALID_CHANGE;
-		cache_revalidated = false;
+		if (!have_delegation ||
+		    (nfsi->cache_validity & NFS_INO_INVALID_CHANGE) != 0)
+			cache_revalidated = false;
 	}
 
-	if (fattr->valid & NFS_ATTR_FATTR_MTIME) {
+	if (fattr->valid & NFS_ATTR_FATTR_MTIME)
 		inode->i_mtime = fattr->mtime;
-	} else if (fattr_supported & NFS_ATTR_FATTR_MTIME) {
+	else if (fattr_supported & NFS_ATTR_FATTR_MTIME)
 		nfsi->cache_validity |=
 			save_cache_validity & NFS_INO_INVALID_MTIME;
-		cache_revalidated = false;
-	}
 
-	if (fattr->valid & NFS_ATTR_FATTR_CTIME) {
+	if (fattr->valid & NFS_ATTR_FATTR_CTIME)
 		inode->i_ctime = fattr->ctime;
-	} else if (fattr_supported & NFS_ATTR_FATTR_CTIME) {
+	else if (fattr_supported & NFS_ATTR_FATTR_CTIME)
 		nfsi->cache_validity |=
 			save_cache_validity & NFS_INO_INVALID_CTIME;
-		cache_revalidated = false;
-	}
 
 	/* Check if our cached file size is stale */
 	if (fattr->valid & NFS_ATTR_FATTR_SIZE) {
@@ -2111,19 +2109,15 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
 			fattr->du.nfs3.used = 0;
 			fattr->valid |= NFS_ATTR_FATTR_SPACE_USED;
 		}
-	} else {
+	} else
 		nfsi->cache_validity |=
 			save_cache_validity & NFS_INO_INVALID_SIZE;
-		cache_revalidated = false;
-	}
 
 	if (fattr->valid & NFS_ATTR_FATTR_ATIME)
 		inode->i_atime = fattr->atime;
-	else if (fattr_supported & NFS_ATTR_FATTR_ATIME) {
+	else if (fattr_supported & NFS_ATTR_FATTR_ATIME)
 		nfsi->cache_validity |=
 			save_cache_validity & NFS_INO_INVALID_ATIME;
-		cache_revalidated = false;
-	}
 
 	if (fattr->valid & NFS_ATTR_FATTR_MODE) {
 		if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) {
@@ -2134,11 +2128,9 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
 				| NFS_INO_INVALID_ACL;
 			attr_changed = true;
 		}
-	} else if (fattr_supported & NFS_ATTR_FATTR_MODE) {
+	} else if (fattr_supported & NFS_ATTR_FATTR_MODE)
 		nfsi->cache_validity |=
 			save_cache_validity & NFS_INO_INVALID_MODE;
-		cache_revalidated = false;
-	}
 
 	if (fattr->valid & NFS_ATTR_FATTR_OWNER) {
 		if (!uid_eq(inode->i_uid, fattr->uid)) {
@@ -2147,11 +2139,9 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
 			inode->i_uid = fattr->uid;
 			attr_changed = true;
 		}
-	} else if (fattr_supported & NFS_ATTR_FATTR_OWNER) {
+	} else if (fattr_supported & NFS_ATTR_FATTR_OWNER)
 		nfsi->cache_validity |=
 			save_cache_validity & NFS_INO_INVALID_OTHER;
-		cache_revalidated = false;
-	}
 
 	if (fattr->valid & NFS_ATTR_FATTR_GROUP) {
 		if (!gid_eq(inode->i_gid, fattr->gid)) {
@@ -2160,11 +2150,9 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
 			inode->i_gid = fattr->gid;
 			attr_changed = true;
 		}
-	} else if (fattr_supported & NFS_ATTR_FATTR_GROUP) {
+	} else if (fattr_supported & NFS_ATTR_FATTR_GROUP)
 		nfsi->cache_validity |=
 			save_cache_validity & NFS_INO_INVALID_OTHER;
-		cache_revalidated = false;
-	}
 
 	if (fattr->valid & NFS_ATTR_FATTR_NLINK) {
 		if (inode->i_nlink != fattr->nlink) {
@@ -2173,30 +2161,24 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
 			set_nlink(inode, fattr->nlink);
 			attr_changed = true;
 		}
-	} else if (fattr_supported & NFS_ATTR_FATTR_NLINK) {
+	} else if (fattr_supported & NFS_ATTR_FATTR_NLINK)
 		nfsi->cache_validity |=
 			save_cache_validity & NFS_INO_INVALID_NLINK;
-		cache_revalidated = false;
-	}
 
 	if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) {
 		/*
 		 * report the blocks in 512byte units
 		 */
 		inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used);
-	} else if (fattr_supported & NFS_ATTR_FATTR_SPACE_USED) {
+	} else if (fattr_supported & NFS_ATTR_FATTR_SPACE_USED)
 		nfsi->cache_validity |=
 			save_cache_validity & NFS_INO_INVALID_BLOCKS;
-		cache_revalidated = false;
-	}
 
-	if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) {
+	if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED)
 		inode->i_blocks = fattr->du.nfs2.blocks;
-	} else if (fattr_supported & NFS_ATTR_FATTR_BLOCKS_USED) {
+	else if (fattr_supported & NFS_ATTR_FATTR_BLOCKS_USED)
 		nfsi->cache_validity |=
 			save_cache_validity & NFS_INO_INVALID_BLOCKS;
-		cache_revalidated = false;
-	}
 
 	/* Update attrtimeo value if we're out of the unstable period */
 	if (attr_changed) {