From: Jeff Layton <jlayton@primarydata.com>
Date: Wed, 30 Jul 2014 01:34:11 +0000 (-0400)
Subject: nfsd: do filp_close in sc_free callback for lock stateids
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=b49e084d8c7df1632bb2b94ae1a21c8a4cf2d8a4;p=deliverable%2Flinux.git

nfsd: do filp_close in sc_free callback for lock stateids

Releasing locks when we unhash the stateid instead of doing so only when
the stateid is actually released will be problematic in later patches
when we need to protect the unhashing with spinlocks. Move it into the
sc_free operation instead.

Signed-off-by: Jeff Layton <jlayton@primarydata.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
---

diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index bb37cc4dd573..8ce5894133aa 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -502,7 +502,7 @@ out_free:
 	return NULL;
 }
 
-static struct nfs4_ol_stateid * nfs4_alloc_stateid(struct nfs4_client *clp)
+static struct nfs4_ol_stateid * nfs4_alloc_open_stateid(struct nfs4_client *clp)
 {
 	struct nfs4_stid *stid;
 	struct nfs4_ol_stateid *stp;
@@ -907,16 +907,23 @@ static void nfs4_free_ol_stateid(struct nfs4_stid *stid)
 	kmem_cache_free(stateid_slab, stid);
 }
 
-static void __release_lock_stateid(struct nfs4_ol_stateid *stp)
+static void nfs4_free_lock_stateid(struct nfs4_stid *stid)
 {
+	struct nfs4_ol_stateid *stp = openlockstateid(stid);
+	struct nfs4_lockowner *lo = lockowner(stp->st_stateowner);
 	struct file *file;
 
+	file = find_any_file(stp->st_stid.sc_file);
+	if (file)
+		filp_close(file, (fl_owner_t)lo);
+	nfs4_free_ol_stateid(stid);
+}
+
+static void __release_lock_stateid(struct nfs4_ol_stateid *stp)
+{
 	list_del(&stp->st_locks);
 	unhash_generic_stateid(stp);
 	unhash_stid(&stp->st_stid);
-	file = find_any_file(stp->st_stid.sc_file);
-	if (file)
-		filp_close(file, (fl_owner_t)lockowner(stp->st_stateowner));
 	nfs4_put_stid(&stp->st_stid);
 }
 
@@ -3287,7 +3294,7 @@ new_owner:
 		return nfserr_jukebox;
 	open->op_openowner = oo;
 alloc_stateid:
-	open->op_stp = nfs4_alloc_stateid(clp);
+	open->op_stp = nfs4_alloc_open_stateid(clp);
 	if (!open->op_stp)
 		return nfserr_jukebox;
 	return nfs_ok;
@@ -4703,17 +4710,20 @@ alloc_init_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp,
 		struct inode *inode,
 		struct nfs4_ol_stateid *open_stp)
 {
+	struct nfs4_stid *s;
 	struct nfs4_ol_stateid *stp;
 	struct nfs4_client *clp = lo->lo_owner.so_client;
 
-	stp = nfs4_alloc_stateid(clp);
-	if (stp == NULL)
+	s = nfs4_alloc_stid(clp, stateid_slab);
+	if (s == NULL)
 		return NULL;
+	stp = openlockstateid(s);
 	stp->st_stid.sc_type = NFS4_LOCK_STID;
 	list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids);
 	stp->st_stateowner = &lo->lo_owner;
 	get_nfs4_file(fp);
 	stp->st_stid.sc_file = fp;
+	stp->st_stid.sc_free = nfs4_free_lock_stateid;
 	stp->st_access_bmap = 0;
 	stp->st_deny_bmap = open_stp->st_deny_bmap;
 	stp->st_openstp = open_stp;