nfsd4: remember to put RW access on stateid destruction

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>

diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index bdf81bf..2a2b3f5 100644 (file)
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -381,14 +381,6 @@ static int nfs4_access_to_omode(u32 access)
        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(struct nfs4_stateid *stp)
 
 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);