From: Trond Myklebust <trond.myklebust@primarydata.com>
Date: Sat, 24 Jan 2015 19:19:19 +0000 (-0500)
Subject: NFSv4.1: Allow parallel LOCK/LOCKU calls
X-Git-Tag: v4.14-rc1~5864^2~48
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=b4019c0e219bb1301865f8b2efedb4773526ed91;p=platform%2Fkernel%2Flinux-rpi.git

NFSv4.1: Allow parallel LOCK/LOCKU calls

Note, however, that we still serialise on the open stateid if the lock
stateid is unconfirmed. Hopefully that will not prove too much of a
burden for first time locks; it should leave the ability to parallelise
OPENs unchanged, since they no longer call the serialisation primitives.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
---

diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 9f6baf9..66befb0 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -5517,6 +5517,7 @@ static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *
 	struct nfs_seqid *seqid;
 	struct nfs4_lock_state *lsp;
 	struct rpc_task *task;
+	struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
 	int status = 0;
 	unsigned char fl_flags = request->fl_flags;
 
@@ -5540,7 +5541,8 @@ static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *
 	lsp = request->fl_u.nfs4_fl.owner;
 	if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
 		goto out;
-	seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
+	alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
+	seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
 	status = -ENOMEM;
 	if (IS_ERR(seqid))
 		goto out;
@@ -5575,6 +5577,7 @@ static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
 	struct nfs4_lockdata *p;
 	struct inode *inode = lsp->ls_state->inode;
 	struct nfs_server *server = NFS_SERVER(inode);
+	struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
 
 	p = kzalloc(sizeof(*p), gfp_mask);
 	if (p == NULL)
@@ -5585,7 +5588,8 @@ static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
 	p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
 	if (IS_ERR(p->arg.open_seqid))
 		goto out_free;
-	p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
+	alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
+	p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
 	if (IS_ERR(p->arg.lock_seqid))
 		goto out_free_seqid;
 	p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;