From: David Woodhouse <dwmw2@infradead.org>
Date: Sun, 17 Aug 2008 16:21:18 +0000 (+0100)
Subject: [PATCH] Optimise NFS readdir hack slightly.
X-Git-Tag: v2.6.28-rc1~24^2~19
X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=c002a6c7977320f95b5edede5ce4e0eeecf291ff;p=linux-2.6-omap-h63xx.git

[PATCH] Optimise NFS readdir hack slightly.

Avoid calling the underlying ->readdir() again when we reached the end
already; keep going round the loop only if we stopped due to our own
buffer being full.

[AV: tidy the things up a bit, while we are there]

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

diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c
index e3e37f7c847..49d4b8725ca 100644
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -1891,7 +1891,6 @@ static int nfsd_buffered_readdir(struct file *file, filldir_t func,
 		if (!size)
 			break;
 
-
 		de = (struct buffered_dirent *)buf.dirent;
 		while (size > 0) {
 			offset = de->offset;
@@ -1908,7 +1907,9 @@ static int nfsd_buffered_readdir(struct file *file, filldir_t func,
 			size -= reclen;
 			de = (struct buffered_dirent *)((char *)de + reclen);
 		}
-		offset = vfs_llseek(file, 0, 1);
+		offset = vfs_llseek(file, 0, SEEK_CUR);
+		if (!buf.full)
+			break;
 	}
 
  done: