^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * In-kernel rpcbind client supporting versions 2, 3, and 4 of the rpcbind
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * protocol
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Based on RFC 1833: "Binding Protocols for ONC RPC Version 2" and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * RFC 3530: "Network File System (NFS) version 4 Protocol"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * Original: Gilles Quillard, Bull Open Source, 2005 <gilles.quillard@bull.net>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * Updated: Chuck Lever, Oracle Corporation, 2007 <chuck.lever@oracle.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) * Descended from net/sunrpc/pmap_clnt.c,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) * Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/socket.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/un.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/in.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/in6.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <linux/mutex.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include <net/ipv6.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #include <linux/sunrpc/clnt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #include <linux/sunrpc/addr.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #include <linux/sunrpc/sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #include <linux/sunrpc/xprtsock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #include <trace/events/sunrpc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #include "netns.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) #define RPCBIND_SOCK_PATHNAME "/var/run/rpcbind.sock"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) #define RPCBIND_PROGRAM (100000u)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) #define RPCBIND_PORT (111u)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) #define RPCBVERS_2 (2u)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) #define RPCBVERS_3 (3u)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) #define RPCBVERS_4 (4u)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) enum {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) RPCBPROC_NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) RPCBPROC_SET,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) RPCBPROC_UNSET,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) RPCBPROC_GETPORT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) RPCBPROC_GETADDR = 3, /* alias for GETPORT */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) RPCBPROC_DUMP,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) RPCBPROC_CALLIT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) RPCBPROC_BCAST = 5, /* alias for CALLIT */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) RPCBPROC_GETTIME,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) RPCBPROC_UADDR2TADDR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) RPCBPROC_TADDR2UADDR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) RPCBPROC_GETVERSADDR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) RPCBPROC_INDIRECT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) RPCBPROC_GETADDRLIST,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) RPCBPROC_GETSTAT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) * r_owner
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) * The "owner" is allowed to unset a service in the rpcbind database.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) * For AF_LOCAL SET/UNSET requests, rpcbind treats this string as a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) * UID which it maps to a local user name via a password lookup.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) * In all other cases it is ignored.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) * For SET/UNSET requests, user space provides a value, even for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) * network requests, and GETADDR uses an empty string. We follow
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) * those precedents here.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) #define RPCB_OWNER_STRING "0"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) #define RPCB_MAXOWNERLEN sizeof(RPCB_OWNER_STRING)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) * XDR data type sizes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) #define RPCB_program_sz (1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) #define RPCB_version_sz (1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) #define RPCB_protocol_sz (1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) #define RPCB_port_sz (1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) #define RPCB_boolean_sz (1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) #define RPCB_netid_sz (1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) #define RPCB_addr_sz (1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) #define RPCB_ownerstring_sz (1 + XDR_QUADLEN(RPCB_MAXOWNERLEN))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) * XDR argument and result sizes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) #define RPCB_mappingargs_sz (RPCB_program_sz + RPCB_version_sz + \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) RPCB_protocol_sz + RPCB_port_sz)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) #define RPCB_getaddrargs_sz (RPCB_program_sz + RPCB_version_sz + \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) RPCB_netid_sz + RPCB_addr_sz + \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) RPCB_ownerstring_sz)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) #define RPCB_getportres_sz RPCB_port_sz
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) #define RPCB_setres_sz RPCB_boolean_sz
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) * Note that RFC 1833 does not put any size restrictions on the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) * address string returned by the remote rpcbind database.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) #define RPCB_getaddrres_sz RPCB_addr_sz
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) static void rpcb_getport_done(struct rpc_task *, void *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) static void rpcb_map_release(void *data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) static const struct rpc_program rpcb_program;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) struct rpcbind_args {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) struct rpc_xprt * r_xprt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) u32 r_prog;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) u32 r_vers;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) u32 r_prot;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) unsigned short r_port;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) const char * r_netid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) const char * r_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) const char * r_owner;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) int r_status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) static const struct rpc_procinfo rpcb_procedures2[];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) static const struct rpc_procinfo rpcb_procedures3[];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) static const struct rpc_procinfo rpcb_procedures4[];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) struct rpcb_info {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) u32 rpc_vers;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) const struct rpc_procinfo *rpc_proc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) static const struct rpcb_info rpcb_next_version[];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) static const struct rpcb_info rpcb_next_version6[];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) static const struct rpc_call_ops rpcb_getport_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) .rpc_call_done = rpcb_getport_done,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) .rpc_release = rpcb_map_release,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) static void rpcb_wake_rpcbind_waiters(struct rpc_xprt *xprt, int status)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) xprt_clear_binding(xprt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) rpc_wake_up_status(&xprt->binding, status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) static void rpcb_map_release(void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) struct rpcbind_args *map = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) rpcb_wake_rpcbind_waiters(map->r_xprt, map->r_status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) xprt_put(map->r_xprt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) kfree(map->r_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) kfree(map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) static int rpcb_get_local(struct net *net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) int cnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) spin_lock(&sn->rpcb_clnt_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) if (sn->rpcb_users)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) sn->rpcb_users++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) cnt = sn->rpcb_users;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) spin_unlock(&sn->rpcb_clnt_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) return cnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) void rpcb_put_local(struct net *net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) struct rpc_clnt *clnt = sn->rpcb_local_clnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) struct rpc_clnt *clnt4 = sn->rpcb_local_clnt4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) int shutdown = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) spin_lock(&sn->rpcb_clnt_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) if (sn->rpcb_users) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) if (--sn->rpcb_users == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) sn->rpcb_local_clnt = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) sn->rpcb_local_clnt4 = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) shutdown = !sn->rpcb_users;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) spin_unlock(&sn->rpcb_clnt_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) if (shutdown) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) * cleanup_rpcb_clnt - remove xprtsock's sysctls, unregister
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) if (clnt4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) rpc_shutdown_client(clnt4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) if (clnt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) rpc_shutdown_client(clnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) static void rpcb_set_local(struct net *net, struct rpc_clnt *clnt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) struct rpc_clnt *clnt4,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) bool is_af_local)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) /* Protected by rpcb_create_local_mutex */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) sn->rpcb_local_clnt = clnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) sn->rpcb_local_clnt4 = clnt4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) sn->rpcb_is_af_local = is_af_local ? 1 : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) smp_wmb();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) sn->rpcb_users = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) * Returns zero on success, otherwise a negative errno value
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) * is returned.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) static int rpcb_create_local_unix(struct net *net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) static const struct sockaddr_un rpcb_localaddr_rpcbind = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) .sun_family = AF_LOCAL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) .sun_path = RPCBIND_SOCK_PATHNAME,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) struct rpc_create_args args = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) .net = net,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) .protocol = XPRT_TRANSPORT_LOCAL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) .address = (struct sockaddr *)&rpcb_localaddr_rpcbind,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) .addrsize = sizeof(rpcb_localaddr_rpcbind),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) .servername = "localhost",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) .program = &rpcb_program,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) .version = RPCBVERS_2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) .authflavor = RPC_AUTH_NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) .cred = current_cred(),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) * We turn off the idle timeout to prevent the kernel
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) * from automatically disconnecting the socket.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) * Otherwise, we'd have to cache the mount namespace
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) * of the caller and somehow pass that to the socket
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) * reconnect code.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) .flags = RPC_CLNT_CREATE_NO_IDLE_TIMEOUT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) struct rpc_clnt *clnt, *clnt4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) int result = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) * Because we requested an RPC PING at transport creation time,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) * this works only if the user space portmapper is rpcbind, and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) * it's listening on AF_LOCAL on the named socket.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) clnt = rpc_create(&args);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) if (IS_ERR(clnt)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) result = PTR_ERR(clnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) clnt4 = rpc_bind_new_program(clnt, &rpcb_program, RPCBVERS_4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) if (IS_ERR(clnt4))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) clnt4 = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) rpcb_set_local(net, clnt, clnt4, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) return result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) * Returns zero on success, otherwise a negative errno value
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) * is returned.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) static int rpcb_create_local_net(struct net *net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) static const struct sockaddr_in rpcb_inaddr_loopback = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) .sin_family = AF_INET,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) .sin_addr.s_addr = htonl(INADDR_LOOPBACK),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) .sin_port = htons(RPCBIND_PORT),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) struct rpc_create_args args = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) .net = net,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) .protocol = XPRT_TRANSPORT_TCP,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) .address = (struct sockaddr *)&rpcb_inaddr_loopback,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) .addrsize = sizeof(rpcb_inaddr_loopback),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) .servername = "localhost",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) .program = &rpcb_program,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) .version = RPCBVERS_2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) .authflavor = RPC_AUTH_UNIX,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) .cred = current_cred(),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) .flags = RPC_CLNT_CREATE_NOPING,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) struct rpc_clnt *clnt, *clnt4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) int result = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) clnt = rpc_create(&args);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) if (IS_ERR(clnt)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) result = PTR_ERR(clnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) * This results in an RPC ping. On systems running portmapper,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) * the v4 ping will fail. Proceed anyway, but disallow rpcb
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) * v4 upcalls.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) clnt4 = rpc_bind_new_program(clnt, &rpcb_program, RPCBVERS_4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) if (IS_ERR(clnt4))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) clnt4 = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) rpcb_set_local(net, clnt, clnt4, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) return result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) * Returns zero on success, otherwise a negative errno value
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) * is returned.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) int rpcb_create_local(struct net *net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) static DEFINE_MUTEX(rpcb_create_local_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) int result = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) if (rpcb_get_local(net))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) return result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) mutex_lock(&rpcb_create_local_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) if (rpcb_get_local(net))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) if (rpcb_create_local_unix(net) != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) result = rpcb_create_local_net(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) mutex_unlock(&rpcb_create_local_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) return result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) static struct rpc_clnt *rpcb_create(struct net *net, const char *nodename,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) const char *hostname,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) struct sockaddr *srvaddr, size_t salen,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) int proto, u32 version,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) const struct cred *cred)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) struct rpc_create_args args = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) .net = net,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) .protocol = proto,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) .address = srvaddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) .addrsize = salen,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) .servername = hostname,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) .nodename = nodename,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) .program = &rpcb_program,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) .version = version,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) .authflavor = RPC_AUTH_UNIX,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) .cred = cred,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) .flags = (RPC_CLNT_CREATE_NOPING |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) RPC_CLNT_CREATE_NONPRIVPORT),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) switch (srvaddr->sa_family) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) case AF_INET:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) ((struct sockaddr_in *)srvaddr)->sin_port = htons(RPCBIND_PORT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) case AF_INET6:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) ((struct sockaddr_in6 *)srvaddr)->sin6_port = htons(RPCBIND_PORT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) return ERR_PTR(-EAFNOSUPPORT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) return rpc_create(&args);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) static int rpcb_register_call(struct sunrpc_net *sn, struct rpc_clnt *clnt, struct rpc_message *msg, bool is_set)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) int flags = RPC_TASK_NOCONNECT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) int error, result = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) if (is_set || !sn->rpcb_is_af_local)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) flags = RPC_TASK_SOFTCONN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) msg->rpc_resp = &result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) error = rpc_call_sync(clnt, msg, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) if (error < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) if (!result)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) return -EACCES;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) * rpcb_register - set or unset a port registration with the local rpcbind svc
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) * @net: target network namespace
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) * @prog: RPC program number to bind
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) * @vers: RPC version number to bind
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) * @prot: transport protocol to register
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) * @port: port value to register
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) * Returns zero if the registration request was dispatched successfully
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) * and the rpcbind daemon returned success. Otherwise, returns an errno
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) * value that reflects the nature of the error (request could not be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) * dispatched, timed out, or rpcbind returned an error).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) * RPC services invoke this function to advertise their contact
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) * information via the system's rpcbind daemon. RPC services
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) * invoke this function once for each [program, version, transport]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) * tuple they wish to advertise.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) * Callers may also unregister RPC services that are no longer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) * available by setting the passed-in port to zero. This removes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) * all registered transports for [program, version] from the local
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) * rpcbind database.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) * This function uses rpcbind protocol version 2 to contact the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) * local rpcbind daemon.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) * Registration works over both AF_INET and AF_INET6, and services
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) * registered via this function are advertised as available for any
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) * address. If the local rpcbind daemon is listening on AF_INET6,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) * services registered via this function will be advertised on
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) * IN6ADDR_ANY (ie available for all AF_INET and AF_INET6
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) * addresses).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) int rpcb_register(struct net *net, u32 prog, u32 vers, int prot, unsigned short port)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) struct rpcbind_args map = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) .r_prog = prog,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) .r_vers = vers,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) .r_prot = prot,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) .r_port = port,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) struct rpc_message msg = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) .rpc_argp = &map,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) bool is_set = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) trace_pmap_register(prog, vers, prot, port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) msg.rpc_proc = &rpcb_procedures2[RPCBPROC_UNSET];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) if (port != 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) msg.rpc_proc = &rpcb_procedures2[RPCBPROC_SET];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) is_set = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) return rpcb_register_call(sn, sn->rpcb_local_clnt, &msg, is_set);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) * Fill in AF_INET family-specific arguments to register
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) static int rpcb_register_inet4(struct sunrpc_net *sn,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) const struct sockaddr *sap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) struct rpc_message *msg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) const struct sockaddr_in *sin = (const struct sockaddr_in *)sap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) struct rpcbind_args *map = msg->rpc_argp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) unsigned short port = ntohs(sin->sin_port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) bool is_set = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) int result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) map->r_addr = rpc_sockaddr2uaddr(sap, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) msg->rpc_proc = &rpcb_procedures4[RPCBPROC_UNSET];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) if (port != 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) msg->rpc_proc = &rpcb_procedures4[RPCBPROC_SET];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) is_set = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) result = rpcb_register_call(sn, sn->rpcb_local_clnt4, msg, is_set);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) kfree(map->r_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) return result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) * Fill in AF_INET6 family-specific arguments to register
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) static int rpcb_register_inet6(struct sunrpc_net *sn,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) const struct sockaddr *sap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) struct rpc_message *msg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)sap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) struct rpcbind_args *map = msg->rpc_argp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) unsigned short port = ntohs(sin6->sin6_port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) bool is_set = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) int result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) map->r_addr = rpc_sockaddr2uaddr(sap, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) msg->rpc_proc = &rpcb_procedures4[RPCBPROC_UNSET];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) if (port != 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) msg->rpc_proc = &rpcb_procedures4[RPCBPROC_SET];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) is_set = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) result = rpcb_register_call(sn, sn->rpcb_local_clnt4, msg, is_set);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) kfree(map->r_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) return result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) static int rpcb_unregister_all_protofamilies(struct sunrpc_net *sn,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) struct rpc_message *msg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) struct rpcbind_args *map = msg->rpc_argp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) trace_rpcb_unregister(map->r_prog, map->r_vers, map->r_netid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) map->r_addr = "";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) msg->rpc_proc = &rpcb_procedures4[RPCBPROC_UNSET];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) return rpcb_register_call(sn, sn->rpcb_local_clnt4, msg, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) * rpcb_v4_register - set or unset a port registration with the local rpcbind
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) * @net: target network namespace
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) * @program: RPC program number of service to (un)register
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) * @version: RPC version number of service to (un)register
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) * @address: address family, IP address, and port to (un)register
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) * @netid: netid of transport protocol to (un)register
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) * Returns zero if the registration request was dispatched successfully
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) * and the rpcbind daemon returned success. Otherwise, returns an errno
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) * value that reflects the nature of the error (request could not be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) * dispatched, timed out, or rpcbind returned an error).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) * RPC services invoke this function to advertise their contact
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) * information via the system's rpcbind daemon. RPC services
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) * invoke this function once for each [program, version, address,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) * netid] tuple they wish to advertise.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) * Callers may also unregister RPC services that are registered at a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) * specific address by setting the port number in @address to zero.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) * They may unregister all registered protocol families at once for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) * a service by passing a NULL @address argument. If @netid is ""
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) * then all netids for [program, version, address] are unregistered.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) * This function uses rpcbind protocol version 4 to contact the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) * local rpcbind daemon. The local rpcbind daemon must support
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) * version 4 of the rpcbind protocol in order for these functions
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) * to register a service successfully.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) * Supported netids include "udp" and "tcp" for UDP and TCP over
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) * IPv4, and "udp6" and "tcp6" for UDP and TCP over IPv6,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) * respectively.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) * The contents of @address determine the address family and the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) * port to be registered. The usual practice is to pass INADDR_ANY
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) * as the raw address, but specifying a non-zero address is also
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) * supported by this API if the caller wishes to advertise an RPC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) * service on a specific network interface.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) * Note that passing in INADDR_ANY does not create the same service
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) * registration as IN6ADDR_ANY. The former advertises an RPC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) * service on any IPv4 address, but not on IPv6. The latter
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) * advertises the service on all IPv4 and IPv6 addresses.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) int rpcb_v4_register(struct net *net, const u32 program, const u32 version,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) const struct sockaddr *address, const char *netid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) struct rpcbind_args map = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) .r_prog = program,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) .r_vers = version,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) .r_netid = netid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) .r_owner = RPCB_OWNER_STRING,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) struct rpc_message msg = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) .rpc_argp = &map,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) if (sn->rpcb_local_clnt4 == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) return -EPROTONOSUPPORT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) if (address == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) return rpcb_unregister_all_protofamilies(sn, &msg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) trace_rpcb_register(map.r_prog, map.r_vers, map.r_addr, map.r_netid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) switch (address->sa_family) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) case AF_INET:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) return rpcb_register_inet4(sn, address, &msg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) case AF_INET6:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) return rpcb_register_inet6(sn, address, &msg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) return -EAFNOSUPPORT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) static struct rpc_task *rpcb_call_async(struct rpc_clnt *rpcb_clnt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) struct rpcbind_args *map, const struct rpc_procinfo *proc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) struct rpc_message msg = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) .rpc_proc = proc,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) .rpc_argp = map,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) .rpc_resp = map,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) struct rpc_task_setup task_setup_data = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) .rpc_client = rpcb_clnt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) .rpc_message = &msg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) .callback_ops = &rpcb_getport_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) .callback_data = map,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) .flags = RPC_TASK_ASYNC | RPC_TASK_SOFTCONN,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) return rpc_run_task(&task_setup_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) * In the case where rpc clients have been cloned, we want to make
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) * sure that we use the program number/version etc of the actual
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) * owner of the xprt. To do so, we walk back up the tree of parents
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) * to find whoever created the transport and/or whoever has the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) * autobind flag set.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) static struct rpc_clnt *rpcb_find_transport_owner(struct rpc_clnt *clnt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) struct rpc_clnt *parent = clnt->cl_parent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) struct rpc_xprt_switch *xps = rcu_access_pointer(clnt->cl_xpi.xpi_xpswitch);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) while (parent != clnt) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) if (rcu_access_pointer(parent->cl_xpi.xpi_xpswitch) != xps)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) if (clnt->cl_autobind)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) clnt = parent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) parent = parent->cl_parent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) return clnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) * rpcb_getport_async - obtain the port for a given RPC service on a given host
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) * @task: task that is waiting for portmapper request
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) * This one can be called for an ongoing RPC request, and can be used in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) * an async (rpciod) context.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) void rpcb_getport_async(struct rpc_task *task)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) struct rpc_clnt *clnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) const struct rpc_procinfo *proc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) u32 bind_version;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) struct rpc_xprt *xprt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) struct rpc_clnt *rpcb_clnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) struct rpcbind_args *map;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) struct rpc_task *child;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) struct sockaddr_storage addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) struct sockaddr *sap = (struct sockaddr *)&addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) size_t salen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) int status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) clnt = rpcb_find_transport_owner(task->tk_client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) xprt = xprt_get(task->tk_xprt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) /* Put self on the wait queue to ensure we get notified if
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) * some other task is already attempting to bind the port */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) rpc_sleep_on_timeout(&xprt->binding, task,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) NULL, jiffies + xprt->bind_timeout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) if (xprt_test_and_set_binding(xprt)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) xprt_put(xprt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) /* Someone else may have bound if we slept */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) if (xprt_bound(xprt)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) status = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) goto bailout_nofree;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) /* Parent transport's destination address */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) salen = rpc_peeraddr(clnt, sap, sizeof(addr));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) /* Don't ever use rpcbind v2 for AF_INET6 requests */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) switch (sap->sa_family) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) case AF_INET:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) proc = rpcb_next_version[xprt->bind_index].rpc_proc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) bind_version = rpcb_next_version[xprt->bind_index].rpc_vers;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) case AF_INET6:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) proc = rpcb_next_version6[xprt->bind_index].rpc_proc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) bind_version = rpcb_next_version6[xprt->bind_index].rpc_vers;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) status = -EAFNOSUPPORT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) goto bailout_nofree;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) if (proc == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) xprt->bind_index = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) status = -EPFNOSUPPORT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) goto bailout_nofree;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) trace_rpcb_getport(clnt, task, bind_version);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) rpcb_clnt = rpcb_create(xprt->xprt_net,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) clnt->cl_nodename,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) xprt->servername, sap, salen,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) xprt->prot, bind_version,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) clnt->cl_cred);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) if (IS_ERR(rpcb_clnt)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) status = PTR_ERR(rpcb_clnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) goto bailout_nofree;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) map = kzalloc(sizeof(struct rpcbind_args), GFP_NOFS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) if (!map) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) status = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) goto bailout_release_client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) map->r_prog = clnt->cl_prog;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) map->r_vers = clnt->cl_vers;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) map->r_prot = xprt->prot;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) map->r_port = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723) map->r_xprt = xprt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) map->r_status = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726) switch (bind_version) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) case RPCBVERS_4:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) case RPCBVERS_3:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729) map->r_netid = xprt->address_strings[RPC_DISPLAY_NETID];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730) map->r_addr = rpc_sockaddr2uaddr(sap, GFP_NOFS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) if (!map->r_addr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732) status = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) goto bailout_free_args;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735) map->r_owner = "";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737) case RPCBVERS_2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738) map->r_addr = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741) BUG();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744) child = rpcb_call_async(rpcb_clnt, map, proc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745) rpc_release_client(rpcb_clnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) xprt->stat.bind_count++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748) rpc_put_task(child);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751) bailout_free_args:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752) kfree(map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753) bailout_release_client:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754) rpc_release_client(rpcb_clnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755) bailout_nofree:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756) rpcb_wake_rpcbind_waiters(xprt, status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757) task->tk_status = status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758) xprt_put(xprt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760) EXPORT_SYMBOL_GPL(rpcb_getport_async);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763) * Rpcbind child task calls this callback via tk_exit.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765) static void rpcb_getport_done(struct rpc_task *child, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767) struct rpcbind_args *map = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768) struct rpc_xprt *xprt = map->r_xprt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770) map->r_status = child->tk_status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772) /* Garbage reply: retry with a lesser rpcbind version */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773) if (map->r_status == -EIO)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774) map->r_status = -EPROTONOSUPPORT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776) /* rpcbind server doesn't support this rpcbind protocol version */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777) if (map->r_status == -EPROTONOSUPPORT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778) xprt->bind_index++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780) if (map->r_status < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781) /* rpcbind server not available on remote host? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782) map->r_port = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784) } else if (map->r_port == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785) /* Requested RPC service wasn't registered on remote host */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786) map->r_status = -EACCES;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788) /* Succeeded */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789) map->r_status = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792) trace_rpcb_setport(child, map->r_status, map->r_port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793) xprt->ops->set_port(xprt, map->r_port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794) if (map->r_port)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795) xprt_set_bound(xprt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799) * XDR functions for rpcbind
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802) static void rpcb_enc_mapping(struct rpc_rqst *req, struct xdr_stream *xdr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803) const void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805) const struct rpcbind_args *rpcb = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806) __be32 *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808) p = xdr_reserve_space(xdr, RPCB_mappingargs_sz << 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809) *p++ = cpu_to_be32(rpcb->r_prog);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810) *p++ = cpu_to_be32(rpcb->r_vers);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811) *p++ = cpu_to_be32(rpcb->r_prot);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812) *p = cpu_to_be32(rpcb->r_port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815) static int rpcb_dec_getport(struct rpc_rqst *req, struct xdr_stream *xdr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816) void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818) struct rpcbind_args *rpcb = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 819) unsigned long port;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 820) __be32 *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 821)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 822) rpcb->r_port = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 823)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 824) p = xdr_inline_decode(xdr, 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825) if (unlikely(p == NULL))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828) port = be32_to_cpup(p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829) if (unlikely(port > USHRT_MAX))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 830) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 831)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 832) rpcb->r_port = port;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 833) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 834) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 835)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 836) static int rpcb_dec_set(struct rpc_rqst *req, struct xdr_stream *xdr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 837) void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 838) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 839) unsigned int *boolp = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 840) __be32 *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 841)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 842) p = xdr_inline_decode(xdr, 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 843) if (unlikely(p == NULL))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 844) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 845)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 846) *boolp = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 847) if (*p != xdr_zero)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 848) *boolp = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 849) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 850) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 851)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 852) static void encode_rpcb_string(struct xdr_stream *xdr, const char *string,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 853) const u32 maxstrlen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 854) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 855) __be32 *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 856) u32 len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 857)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 858) len = strlen(string);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 859) WARN_ON_ONCE(len > maxstrlen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 860) if (len > maxstrlen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 861) /* truncate and hope for the best */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 862) len = maxstrlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 863) p = xdr_reserve_space(xdr, 4 + len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 864) xdr_encode_opaque(p, string, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 865) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 866)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 867) static void rpcb_enc_getaddr(struct rpc_rqst *req, struct xdr_stream *xdr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 868) const void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 869) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 870) const struct rpcbind_args *rpcb = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 871) __be32 *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 872)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 873) p = xdr_reserve_space(xdr, (RPCB_program_sz + RPCB_version_sz) << 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 874) *p++ = cpu_to_be32(rpcb->r_prog);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 875) *p = cpu_to_be32(rpcb->r_vers);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 876)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 877) encode_rpcb_string(xdr, rpcb->r_netid, RPCBIND_MAXNETIDLEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 878) encode_rpcb_string(xdr, rpcb->r_addr, RPCBIND_MAXUADDRLEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 879) encode_rpcb_string(xdr, rpcb->r_owner, RPCB_MAXOWNERLEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 880) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 881)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 882) static int rpcb_dec_getaddr(struct rpc_rqst *req, struct xdr_stream *xdr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 883) void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 884) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 885) struct rpcbind_args *rpcb = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 886) struct sockaddr_storage address;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 887) struct sockaddr *sap = (struct sockaddr *)&address;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 888) __be32 *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 889) u32 len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 890)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 891) rpcb->r_port = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 892)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 893) p = xdr_inline_decode(xdr, 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 894) if (unlikely(p == NULL))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 895) goto out_fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 896) len = be32_to_cpup(p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 897)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 898) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 899) * If the returned universal address is a null string,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 900) * the requested RPC service was not registered.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 901) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 902) if (len == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 903) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 904)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 905) if (unlikely(len > RPCBIND_MAXUADDRLEN))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 906) goto out_fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 907)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 908) p = xdr_inline_decode(xdr, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 909) if (unlikely(p == NULL))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 910) goto out_fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 911)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 912) if (rpc_uaddr2sockaddr(req->rq_xprt->xprt_net, (char *)p, len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 913) sap, sizeof(address)) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 914) goto out_fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 915) rpcb->r_port = rpc_get_port(sap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 916)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 917) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 918)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 919) out_fail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 920) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 921) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 922)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 923) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 924) * Not all rpcbind procedures described in RFC 1833 are implemented
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 925) * since the Linux kernel RPC code requires only these.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 926) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 927)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 928) static const struct rpc_procinfo rpcb_procedures2[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 929) [RPCBPROC_SET] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 930) .p_proc = RPCBPROC_SET,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 931) .p_encode = rpcb_enc_mapping,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 932) .p_decode = rpcb_dec_set,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 933) .p_arglen = RPCB_mappingargs_sz,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 934) .p_replen = RPCB_setres_sz,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 935) .p_statidx = RPCBPROC_SET,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 936) .p_timer = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 937) .p_name = "SET",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 938) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 939) [RPCBPROC_UNSET] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 940) .p_proc = RPCBPROC_UNSET,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 941) .p_encode = rpcb_enc_mapping,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 942) .p_decode = rpcb_dec_set,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 943) .p_arglen = RPCB_mappingargs_sz,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 944) .p_replen = RPCB_setres_sz,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 945) .p_statidx = RPCBPROC_UNSET,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 946) .p_timer = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 947) .p_name = "UNSET",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 948) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 949) [RPCBPROC_GETPORT] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 950) .p_proc = RPCBPROC_GETPORT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 951) .p_encode = rpcb_enc_mapping,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 952) .p_decode = rpcb_dec_getport,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 953) .p_arglen = RPCB_mappingargs_sz,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 954) .p_replen = RPCB_getportres_sz,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 955) .p_statidx = RPCBPROC_GETPORT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 956) .p_timer = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 957) .p_name = "GETPORT",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 958) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 959) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 960)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 961) static const struct rpc_procinfo rpcb_procedures3[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 962) [RPCBPROC_SET] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 963) .p_proc = RPCBPROC_SET,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 964) .p_encode = rpcb_enc_getaddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 965) .p_decode = rpcb_dec_set,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 966) .p_arglen = RPCB_getaddrargs_sz,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 967) .p_replen = RPCB_setres_sz,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 968) .p_statidx = RPCBPROC_SET,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 969) .p_timer = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 970) .p_name = "SET",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 971) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 972) [RPCBPROC_UNSET] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 973) .p_proc = RPCBPROC_UNSET,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 974) .p_encode = rpcb_enc_getaddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 975) .p_decode = rpcb_dec_set,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 976) .p_arglen = RPCB_getaddrargs_sz,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 977) .p_replen = RPCB_setres_sz,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 978) .p_statidx = RPCBPROC_UNSET,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 979) .p_timer = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 980) .p_name = "UNSET",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 981) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 982) [RPCBPROC_GETADDR] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 983) .p_proc = RPCBPROC_GETADDR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 984) .p_encode = rpcb_enc_getaddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 985) .p_decode = rpcb_dec_getaddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 986) .p_arglen = RPCB_getaddrargs_sz,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 987) .p_replen = RPCB_getaddrres_sz,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 988) .p_statidx = RPCBPROC_GETADDR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 989) .p_timer = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 990) .p_name = "GETADDR",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 991) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 992) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 993)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 994) static const struct rpc_procinfo rpcb_procedures4[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 995) [RPCBPROC_SET] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 996) .p_proc = RPCBPROC_SET,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 997) .p_encode = rpcb_enc_getaddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 998) .p_decode = rpcb_dec_set,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 999) .p_arglen = RPCB_getaddrargs_sz,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1000) .p_replen = RPCB_setres_sz,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1001) .p_statidx = RPCBPROC_SET,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1002) .p_timer = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1003) .p_name = "SET",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1004) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1005) [RPCBPROC_UNSET] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1006) .p_proc = RPCBPROC_UNSET,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1007) .p_encode = rpcb_enc_getaddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1008) .p_decode = rpcb_dec_set,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1009) .p_arglen = RPCB_getaddrargs_sz,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1010) .p_replen = RPCB_setres_sz,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1011) .p_statidx = RPCBPROC_UNSET,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1012) .p_timer = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1013) .p_name = "UNSET",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1014) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1015) [RPCBPROC_GETADDR] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1016) .p_proc = RPCBPROC_GETADDR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1017) .p_encode = rpcb_enc_getaddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1018) .p_decode = rpcb_dec_getaddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1019) .p_arglen = RPCB_getaddrargs_sz,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1020) .p_replen = RPCB_getaddrres_sz,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1021) .p_statidx = RPCBPROC_GETADDR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1022) .p_timer = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1023) .p_name = "GETADDR",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1024) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1025) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1026)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1027) static const struct rpcb_info rpcb_next_version[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1028) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1029) .rpc_vers = RPCBVERS_2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1030) .rpc_proc = &rpcb_procedures2[RPCBPROC_GETPORT],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1031) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1032) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1033) .rpc_proc = NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1034) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1035) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1036)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1037) static const struct rpcb_info rpcb_next_version6[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1038) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1039) .rpc_vers = RPCBVERS_4,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1040) .rpc_proc = &rpcb_procedures4[RPCBPROC_GETADDR],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1041) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1042) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1043) .rpc_vers = RPCBVERS_3,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1044) .rpc_proc = &rpcb_procedures3[RPCBPROC_GETADDR],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1045) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1046) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1047) .rpc_proc = NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1048) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1049) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1050)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1051) static unsigned int rpcb_version2_counts[ARRAY_SIZE(rpcb_procedures2)];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1052) static const struct rpc_version rpcb_version2 = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1053) .number = RPCBVERS_2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1054) .nrprocs = ARRAY_SIZE(rpcb_procedures2),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1055) .procs = rpcb_procedures2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1056) .counts = rpcb_version2_counts,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1057) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1058)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1059) static unsigned int rpcb_version3_counts[ARRAY_SIZE(rpcb_procedures3)];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1060) static const struct rpc_version rpcb_version3 = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1061) .number = RPCBVERS_3,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1062) .nrprocs = ARRAY_SIZE(rpcb_procedures3),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1063) .procs = rpcb_procedures3,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1064) .counts = rpcb_version3_counts,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1065) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1066)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1067) static unsigned int rpcb_version4_counts[ARRAY_SIZE(rpcb_procedures4)];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1068) static const struct rpc_version rpcb_version4 = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1069) .number = RPCBVERS_4,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1070) .nrprocs = ARRAY_SIZE(rpcb_procedures4),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1071) .procs = rpcb_procedures4,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1072) .counts = rpcb_version4_counts,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1073) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1074)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1075) static const struct rpc_version *rpcb_version[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1076) NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1077) NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1078) &rpcb_version2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1079) &rpcb_version3,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1080) &rpcb_version4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1081) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1082)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1083) static struct rpc_stat rpcb_stats;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1084)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1085) static const struct rpc_program rpcb_program = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1086) .name = "rpcbind",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1087) .number = RPCBIND_PROGRAM,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1088) .nrvers = ARRAY_SIZE(rpcb_version),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1089) .version = rpcb_version,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1090) .stats = &rpcb_stats,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1091) };
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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