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Subject[076/102] nfsd4: remember to put RW access on stateid destruction
3.0-stable review patch.  If anyone has any objections, please let us know.

------------------

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);



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