5.1-stable patches

[thirdparty/kernel/stable-queue.git] / releases / 3.0.1 / nfsd4-remember-to-put-rw-access-on-stateid-destruction.patch

From 499f3edc23ca0431f3a0a6736b3a40944c81bf3b Mon Sep 17 00:00:00 2001
From: "J. Bruce Fields" <bfields@redhat.com>
Date: Mon, 27 Jun 2011 16:57:12 -0400
Subject: nfsd4: remember to put RW access on stateid destruction

From: "J. Bruce Fields" <bfields@redhat.com>

commit 499f3edc23ca0431f3a0a6736b3a40944c81bf3b upstream.

Without this, for example,

	open read
	open read+write
	close

will result in a struct file leak.

Regression from 7d94784293096c0a46897acdb83be5abd9278ece "nfsd4: fix
downgrade/lock logic".

Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

---
 fs/nfsd/nfs4state.c |   17 ++++++-----------
 1 file changed, 6 insertions(+), 11 deletions(-)

--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -381,14 +381,6 @@ static int nfs4_access_to_omode(u32 acce
 	BUG();
 }
 
-static int nfs4_access_bmap_to_omode(struct nfs4_stateid *stp)
-{
-	unsigned int access;
-
-	set_access(&access, stp->st_access_bmap);
-	return nfs4_access_to_omode(access);
-}
-
 static void unhash_generic_stateid(struct nfs4_stateid *stp)
 {
 	list_del(&stp->st_hash);
@@ -398,11 +390,14 @@ static void unhash_generic_stateid(struc
 
 static void free_generic_stateid(struct nfs4_stateid *stp)
 {
-	int oflag;
+	int i;
 
 	if (stp->st_access_bmap) {
-		oflag = nfs4_access_bmap_to_omode(stp);
-		nfs4_file_put_access(stp->st_file, oflag);
+		for (i = 1; i < 4; i++) {
+			if (test_bit(i, &stp->st_access_bmap))
+				nfs4_file_put_access(stp->st_file,
+						nfs4_access_to_omode(i));
+		}
 	}
 	put_nfs4_file(stp->st_file);
 	kmem_cache_free(stateid_slab, stp);