@@ -13,12 +13,15 @@
#include <linux/nfs.h>
#include <linux/nfs_common.h>
#include <linux/nfslocalio.h>
+#include <linux/nfs_fs.h>
+#include <linux/nfs_xdr.h>
#include <linux/string.h>
#include "nfsd.h"
#include "vfs.h"
#include "netns.h"
#include "filecache.h"
+#include "cache.h"
/**
* nfsd_open_local_fh - lookup a local filehandle @nfs_fh and map to nfsd_file
@@ -112,3 +115,77 @@ EXPORT_SYMBOL_GPL(nfsd_open_local_fh);
/* Compile time type checking, not used by anything */
static nfs_to_nfsd_open_local_fh_t __maybe_unused nfsd_open_local_fh_typecheck = nfsd_open_local_fh;
+
+/*
+ * UUID_IS_LOCAL XDR functions
+ */
+
+static __be32 localio_proc_null(struct svc_rqst *rqstp)
+{
+ return rpc_success;
+}
+
+struct localio_uuidarg {
+ uuid_t uuid;
+};
+
+static __be32 localio_proc_uuid_is_local(struct svc_rqst *rqstp)
+{
+ struct localio_uuidarg *argp = rqstp->rq_argp;
+ struct net *net = SVC_NET(rqstp);
+ struct nfsd_net *nn = net_generic(net, nfsd_net_id);
+
+ nfs_uuid_is_local(&argp->uuid, &nn->local_clients,
+ net, rqstp->rq_client);
+
+ return rpc_success;
+}
+
+static bool localio_decode_uuidarg(struct svc_rqst *rqstp,
+ struct xdr_stream *xdr)
+{
+ struct localio_uuidarg *argp = rqstp->rq_argp;
+ u8 uuid[UUID_SIZE];
+
+ if (decode_opaque_fixed(xdr, uuid, UUID_SIZE))
+ return false;
+ import_uuid(&argp->uuid, uuid);
+
+ return true;
+}
+
+static const struct svc_procedure localio_procedures1[] = {
+ [LOCALIOPROC_NULL] = {
+ .pc_func = localio_proc_null,
+ .pc_decode = nfssvc_decode_voidarg,
+ .pc_encode = nfssvc_encode_voidres,
+ .pc_argsize = sizeof(struct nfsd_voidargs),
+ .pc_ressize = sizeof(struct nfsd_voidres),
+ .pc_cachetype = RC_NOCACHE,
+ .pc_xdrressize = 0,
+ .pc_name = "NULL",
+ },
+ [LOCALIOPROC_UUID_IS_LOCAL] = {
+ .pc_func = localio_proc_uuid_is_local,
+ .pc_decode = localio_decode_uuidarg,
+ .pc_encode = nfssvc_encode_voidres,
+ .pc_argsize = sizeof(struct localio_uuidarg),
+ .pc_argzero = sizeof(struct localio_uuidarg),
+ .pc_ressize = sizeof(struct nfsd_voidres),
+ .pc_cachetype = RC_NOCACHE,
+ .pc_name = "UUID_IS_LOCAL",
+ },
+};
+
+#define LOCALIO_NR_PROCEDURES ARRAY_SIZE(localio_procedures1)
+static DEFINE_PER_CPU_ALIGNED(unsigned long,
+ localio_count[LOCALIO_NR_PROCEDURES]);
+const struct svc_version localio_version1 = {
+ .vs_vers = 1,
+ .vs_nproc = LOCALIO_NR_PROCEDURES,
+ .vs_proc = localio_procedures1,
+ .vs_dispatch = nfsd_dispatch,
+ .vs_count = localio_count,
+ .vs_xdrsize = XDR_QUADLEN(UUID_SIZE),
+ .vs_hidden = true,
+};
@@ -216,6 +216,8 @@ struct nfsd_net {
/* last time an admin-revoke happened for NFSv4.0 */
time64_t nfs40_last_revoke;
+ /* Local clients to be invalidated when net is shut down */
+ struct list_head local_clients;
};
/* Simple check to find out if a given net was properly initialized */
@@ -18,6 +18,7 @@
#include <linux/sunrpc/svc.h>
#include <linux/module.h>
#include <linux/fsnotify.h>
+#include <linux/nfslocalio.h>
#include "idmap.h"
#include "nfsd.h"
@@ -2257,6 +2258,7 @@ static __net_init int nfsd_net_init(struct net *net)
get_random_bytes(&nn->siphash_key, sizeof(nn->siphash_key));
seqlock_init(&nn->writeverf_lock);
nfsd_proc_stat_init(net);
+ INIT_LIST_HEAD(&nn->local_clients);
return 0;
@@ -2268,6 +2270,19 @@ static __net_init int nfsd_net_init(struct net *net)
return retval;
}
+/**
+ * nfsd_net_pre_exit - Disconnect localio clients from net namespace
+ * @net: a network namespace that is about to be destroyed
+ *
+ * This invalidated ->net pointers held by localio clients
+ * while they can still safely access nn->counter.
+ */
+static __net_exit void nfsd_net_pre_exit(struct net *net)
+{
+ struct nfsd_net *nn = net_generic(net, nfsd_net_id);
+
+ nfs_uuid_invalidate_clients(&nn->local_clients);
+}
/**
* nfsd_net_exit - Release the nfsd_net portion of a net namespace
* @net: a network namespace that is about to be destroyed
@@ -2285,6 +2300,7 @@ static __net_exit void nfsd_net_exit(struct net *net)
static struct pernet_operations nfsd_net_ops = {
.init = nfsd_net_init,
+ .pre_exit = nfsd_net_pre_exit,
.exit = nfsd_net_exit,
.id = &nfsd_net_id,
.size = sizeof(struct nfsd_net),
@@ -146,6 +146,10 @@ extern const struct svc_version nfsd_acl_version3;
#endif
#endif
+#if IS_ENABLED(CONFIG_NFSD_LOCALIO)
+extern const struct svc_version localio_version1;
+#endif
+
struct nfsd_net;
enum vers_op {NFSD_SET, NFSD_CLEAR, NFSD_TEST, NFSD_AVAIL };
@@ -80,6 +80,15 @@ DEFINE_SPINLOCK(nfsd_drc_lock);
unsigned long nfsd_drc_max_mem;
unsigned long nfsd_drc_mem_used;
+#if IS_ENABLED(CONFIG_NFSD_LOCALIO)
+static const struct svc_version *localio_versions[] = {
+ [1] = &localio_version1,
+};
+
+#define NFSD_LOCALIO_NRVERS ARRAY_SIZE(localio_versions)
+
+#endif /* CONFIG_NFSD_LOCALIO */
+
#if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL)
static const struct svc_version *nfsd_acl_version[] = {
# if defined(CONFIG_NFSD_V2_ACL)
@@ -128,6 +137,18 @@ struct svc_program nfsd_programs[] = {
.pg_rpcbind_set = nfsd_acl_rpcbind_set,
},
#endif /* defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL) */
+#if IS_ENABLED(CONFIG_NFSD_LOCALIO)
+ {
+ .pg_prog = NFS_LOCALIO_PROGRAM,
+ .pg_nvers = NFSD_LOCALIO_NRVERS,
+ .pg_vers = localio_versions,
+ .pg_name = "nfslocalio",
+ .pg_class = "nfsd",
+ .pg_authenticate = svc_set_client,
+ .pg_init_request = svc_generic_init_request,
+ .pg_rpcbind_set = svc_generic_rpcbind_set,
+ }
+#endif /* IS_ENABLED(CONFIG_NFSD_LOCALIO) */
};
bool nfsd_support_version(int vers)
@@ -949,7 +970,7 @@ nfsd(void *vrqstp)
}
/**
- * nfsd_dispatch - Process an NFS or NFSACL Request
+ * nfsd_dispatch - Process an NFS or NFSACL or LOCALIO Request
* @rqstp: incoming request
*
* This RPC dispatcher integrates the NFS server's duplicate reply cache.
@@ -13,6 +13,13 @@
#include <linux/crc32.h>
#include <uapi/linux/nfs.h>
+/* The localio program is entirely private to Linux and is
+ * NOT part of the uapi.
+ */
+#define NFS_LOCALIO_PROGRAM 400122
+#define LOCALIOPROC_NULL 0
+#define LOCALIOPROC_UUID_IS_LOCAL 1
+
/*
* This is the kernel NFS client file handle representation
*/