NFS: Ensure we use the correct cookie in nfs_readdir_xdr_filler

We need to use the cookie from the previous array entry, not the
actual cookie that we are searching for (except for the case of
uncached_readdir).

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

1 files changed, 8 insertions, 2 deletions

diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index f0a384e2ae6..e03537ff935 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -178,6 +178,7 @@ typedef struct {
         struct page     *page;
         unsigned long   page_index;
         u64             *dir_cookie;
+        u64             last_cookie;
         loff_t          current_index;
         decode_dirent_t decode;
 
@@ -344,6 +345,8 @@ int nfs_readdir_search_array(nfs_readdir_descriptor_t *desc)
         else
                 status = nfs_readdir_search_for_cookie(array, desc);
 
+        if (status == -EAGAIN)
+                desc->last_cookie = array->last_cookie;
         nfs_readdir_release_array(desc->page);
 out:
         return status;
@@ -563,7 +566,7 @@ int nfs_readdir_xdr_to_array(nfs_readdir_descriptor_t *desc, struct page *page,
         unsigned int array_size = ARRAY_SIZE(pages);
 
         entry.prev_cookie = 0;
-        entry.cookie = *desc->dir_cookie;
+        entry.cookie = desc->last_cookie;
         entry.eof = 0;
         entry.fh = nfs_alloc_fhandle();
         entry.fattr = nfs_alloc_fattr();
@@ -672,8 +675,10 @@ int readdir_search_pagecache(nfs_readdir_descriptor_t *desc)
 {
         int res;
 
-        if (desc->page_index == 0)
+        if (desc->page_index == 0) {
                 desc->current_index = 0;
+                desc->last_cookie = 0;
+        }
         while (1) {
                 res = find_cache_page(desc);
                 if (res != -EAGAIN)
@@ -764,6 +769,7 @@ int uncached_readdir(nfs_readdir_descriptor_t *desc, void *dirent,
         }
 
         desc->page_index = 0;
+        desc->last_cookie = *desc->dir_cookie;
         desc->page = page;
 
         status = nfs_readdir_xdr_to_array(desc, page, inode);