Commit 6c34f05b authored by Trond Myklebust's avatar Trond Myklebust
Browse files

NFS: If the cookie verifier changes, we must invalidate the page cache 



Ensure that if the cookie verifier changes when we use the zero-valued
cookie, then we invalidate any cached pages.

Signed-off-by: default avatarTrond Myklebust <trond.myklebust@hammerspace.com>
parent 580f2367

fs/nfs/dir.c

+6 −1
Original line number Diff line number Diff line
@@ -990,9 +990,14 @@ static int find_and_lock_cache_page(struct nfs_readdir_descriptor *desc) 
		/*

		 * Set the cookie verifier if the page cache was empty

		 */

		if (desc->page_index == 0)

		if (desc->last_cookie == 0 &&

		    memcmp(nfsi->cookieverf, verf, sizeof(nfsi->cookieverf))) {

			memcpy(nfsi->cookieverf, verf,

			       sizeof(nfsi->cookieverf));

			invalidate_inode_pages2_range(desc->file->f_mapping,

						      desc->page_index_max + 1,

						      -1);

		}

	}

	res = nfs_readdir_search_array(desc);

	if (res == 0)