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authorTrond Myklebust <Trond.Myklebust@netapp.com>2010-12-21 10:45:27 -0500
committerTrond Myklebust <Trond.Myklebust@netapp.com>2011-01-06 16:03:13 -0500
commitd035c36c58dd9183ad6aa7875dea89893faedb55 (patch)
treed12581ff27c659c701707bf62fd39566ee696e51
parentd3978bb325510f0a26ebd92f211b36c5f98b2306 (diff)
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NFSv4: Ensure continued open and lockowner name uniqueness
In order to enable migration support, we will want to move some of the structures that are subject to migration into the struct nfs_server. In particular, if we are to move the state_owner and state_owner_id to being a per-filesystem structure, then we should label the resulting open/lock owners with a per-filesytem label to ensure global uniqueness. This patch does so by adding the super block s_dev to the open/lock owner name. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
-rw-r--r--fs/nfs/nfs4proc.c3
-rw-r--r--fs/nfs/nfs4xdr.c14
-rw-r--r--include/linux/nfs_xdr.h1
3 files changed, 12 insertions, 6 deletions
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 88f590f..f2b92f6 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -3779,6 +3779,7 @@ static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock
goto out;
lsp = request->fl_u.nfs4_fl.owner;
arg.lock_owner.id = lsp->ls_id.id;
+ arg.lock_owner.s_dev = server->s_dev;
status = nfs4_call_sync(server, &msg, &arg, &res, 1);
switch (status) {
case 0:
@@ -4024,6 +4025,7 @@ static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
p->arg.lock_stateid = &lsp->ls_stateid;
p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
p->arg.lock_owner.id = lsp->ls_id.id;
+ p->arg.lock_owner.s_dev = server->s_dev;
p->res.lock_seqid = p->arg.lock_seqid;
p->lsp = lsp;
p->server = server;
@@ -4428,6 +4430,7 @@ void nfs4_release_lockowner(const struct nfs4_lock_state *lsp)
return;
args->lock_owner.clientid = server->nfs_client->cl_clientid;
args->lock_owner.id = lsp->ls_id.id;
+ args->lock_owner.s_dev = server->s_dev;
msg.rpc_argp = args;
rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, args);
}
diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
index 3cbdd0c..8e49688 100644
--- a/fs/nfs/nfs4xdr.c
+++ b/fs/nfs/nfs4xdr.c
@@ -71,8 +71,8 @@ static int nfs4_stat_to_errno(int);
/* lock,open owner id:
* we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT >> 2)
*/
-#define open_owner_id_maxsz (1 + 4)
-#define lock_owner_id_maxsz (1 + 4)
+#define open_owner_id_maxsz (1 + 1 + 4)
+#define lock_owner_id_maxsz (1 + 1 + 4)
#define decode_lockowner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
#define compound_encode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
#define compound_decode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2))
@@ -1088,10 +1088,11 @@ static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lo
{
__be32 *p;
- p = reserve_space(xdr, 28);
+ p = reserve_space(xdr, 32);
p = xdr_encode_hyper(p, lowner->clientid);
- *p++ = cpu_to_be32(16);
+ *p++ = cpu_to_be32(20);
p = xdr_encode_opaque_fixed(p, "lock id:", 8);
+ *p++ = cpu_to_be32(lowner->s_dev);
xdr_encode_hyper(p, lowner->id);
}
@@ -1210,10 +1211,11 @@ static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_opena
*p++ = cpu_to_be32(OP_OPEN);
*p = cpu_to_be32(arg->seqid->sequence->counter);
encode_share_access(xdr, arg->fmode);
- p = reserve_space(xdr, 28);
+ p = reserve_space(xdr, 32);
p = xdr_encode_hyper(p, arg->clientid);
- *p++ = cpu_to_be32(16);
+ *p++ = cpu_to_be32(20);
p = xdr_encode_opaque_fixed(p, "open id:", 8);
+ *p++ = cpu_to_be32(arg->server->s_dev);
xdr_encode_hyper(p, arg->id);
}
diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h
index 83d36d3..b006857 100644
--- a/include/linux/nfs_xdr.h
+++ b/include/linux/nfs_xdr.h
@@ -317,6 +317,7 @@ struct nfs_closeres {
struct nfs_lowner {
__u64 clientid;
__u64 id;
+ dev_t s_dev;
};
struct nfs_lock_args {