From 8400b0d567a3cd7581253975bed1a6425fc6de91 Mon Sep 17 00:00:00 2001
From: wengang wang <wen.gang.wang@oracle.com>
Date: Tue, 10 Feb 2009 11:27:51 +0800
Subject: [PATCH] --- yaml --- r: 142148 b: refs/heads/master c:
 4ac35c2f794503d3acda20d98e89cf63f6e94332 h: refs/heads/master v: v3

---
 [refs]              |  2 +-
 trunk/fs/nfsd/vfs.c | 19 +++++++++++++++++++
 2 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/[refs] b/[refs]
index 6078bb066f60..6fe7661cd5fc 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: e33d1ea60c3a17b8b5c2910b1eef4c1faf0ac450
+refs/heads/master: 4ac35c2f794503d3acda20d98e89cf63f6e94332
diff --git a/trunk/fs/nfsd/vfs.c b/trunk/fs/nfsd/vfs.c
index 6e50aaa56ca2..0c076293155d 100644
--- a/trunk/fs/nfsd/vfs.c
+++ b/trunk/fs/nfsd/vfs.c
@@ -1176,6 +1176,21 @@ nfsd_create_setattr(struct svc_rqst *rqstp, struct svc_fh *resfhp,
 	return 0;
 }
 
+/* HPUX client sometimes creates a file in mode 000, and sets size to 0.
+ * setting size to 0 may fail for some specific file systems by the permission
+ * checking which requires WRITE permission but the mode is 000.
+ * we ignore the resizing(to 0) on the just new created file, since the size is
+ * 0 after file created.
+ *
+ * call this only after vfs_create() is called.
+ * */
+static void
+nfsd_check_ignore_resizing(struct iattr *iap)
+{
+	if ((iap->ia_valid & ATTR_SIZE) && (iap->ia_size == 0))
+		iap->ia_valid &= ~ATTR_SIZE;
+}
+
 /*
  * Create a file (regular, directory, device, fifo); UNIX sockets 
  * not yet implemented.
@@ -1271,6 +1286,8 @@ nfsd_create(struct svc_rqst *rqstp, struct svc_fh *fhp,
 	switch (type) {
 	case S_IFREG:
 		host_err = vfs_create(dirp, dchild, iap->ia_mode, NULL);
+		if (!host_err)
+			nfsd_check_ignore_resizing(iap);
 		break;
 	case S_IFDIR:
 		host_err = vfs_mkdir(dirp, dchild, iap->ia_mode);
@@ -1424,6 +1441,8 @@ nfsd_create_v3(struct svc_rqst *rqstp, struct svc_fh *fhp,
 		/* setattr will sync the child (or not) */
 	}
 
+	nfsd_check_ignore_resizing(iap);
+
 	if (createmode == NFS3_CREATE_EXCLUSIVE) {
 		/* Cram the verifier into atime/mtime */
 		iap->ia_valid = ATTR_MTIME|ATTR_ATIME