[PATCH] prepare vfs_readdir() callers to returning filldir result

It's not the final state, but it allows moving ->readdir() instances
to passing filldir return value to caller of vfs_readdir().

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 9 insertions, 2 deletions

diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c
index 93b22f661d9d..e3e37f7c8477 100644
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -1831,6 +1831,7 @@ struct buffered_dirent {
 struct readdir_data {
         char            *dirent;
         size_t          used;
+        int             full;
 };
 
 static int nfsd_buffered_filldir(void *__buf, const char *name, int namlen,
@@ -1841,8 +1842,10 @@ static int nfsd_buffered_filldir(void *__buf, const char *name, int namlen,
         unsigned int reclen;
 
         reclen = ALIGN(sizeof(struct buffered_dirent) + namlen, sizeof(u64));
-        if (buf->used + reclen > PAGE_SIZE)
+        if (buf->used + reclen > PAGE_SIZE) {
+                buf->full = 1;
                 return -EINVAL;
+        }
 
         de->namlen = namlen;
         de->offset = offset;
@@ -1874,9 +1877,13 @@ static int nfsd_buffered_readdir(struct file *file, filldir_t func,
                 unsigned int reclen;
 
                 buf.used = 0;
+                buf.full = 0;
 
                 host_err = vfs_readdir(file, nfsd_buffered_filldir, &buf);
-                if (host_err)
+                if (buf.full)
+                        host_err = 0;
+
+                if (host_err < 0)
                         break;
 
                 size = buf.used;