Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/fs/lockd/svc.c |
| 3 | * |
| 4 | * This is the central lockd service. |
| 5 | * |
| 6 | * FIXME: Separate the lockd NFS server functionality from the lockd NFS |
| 7 | * client functionality. Oh why didn't Sun create two separate |
| 8 | * services in the first place? |
| 9 | * |
| 10 | * Authors: Olaf Kirch (okir@monad.swb.de) |
| 11 | * |
| 12 | * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de> |
| 13 | */ |
| 14 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | #include <linux/module.h> |
| 16 | #include <linux/init.h> |
| 17 | #include <linux/sysctl.h> |
| 18 | #include <linux/moduleparam.h> |
| 19 | |
| 20 | #include <linux/sched.h> |
| 21 | #include <linux/errno.h> |
| 22 | #include <linux/in.h> |
| 23 | #include <linux/uio.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | #include <linux/smp.h> |
Ingo Molnar | 353ab6e | 2006-03-26 01:37:12 -0800 | [diff] [blame] | 25 | #include <linux/mutex.h> |
Jeff Layton | d751a7c | 2008-02-07 16:34:55 -0500 | [diff] [blame] | 26 | #include <linux/kthread.h> |
Rafael J. Wysocki | 8314418 | 2007-07-17 04:03:35 -0700 | [diff] [blame] | 27 | #include <linux/freezer.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | |
| 29 | #include <linux/sunrpc/types.h> |
| 30 | #include <linux/sunrpc/stats.h> |
| 31 | #include <linux/sunrpc/clnt.h> |
| 32 | #include <linux/sunrpc/svc.h> |
| 33 | #include <linux/sunrpc/svcsock.h> |
NeilBrown | 24e3666 | 2006-10-02 02:17:45 -0700 | [diff] [blame] | 34 | #include <net/ip.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | #include <linux/lockd/lockd.h> |
| 36 | #include <linux/nfs.h> |
| 37 | |
Stanislav Kinsbursky | a9c5d73 | 2012-01-31 15:07:57 +0400 | [diff] [blame] | 38 | #include "netns.h" |
| 39 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | #define NLMDBG_FACILITY NLMDBG_SVC |
| 41 | #define LOCKD_BUFSIZE (1024 + NLMSVC_XDRSIZE) |
| 42 | #define ALLOWED_SIGS (sigmask(SIGKILL)) |
| 43 | |
| 44 | static struct svc_program nlmsvc_program; |
| 45 | |
| 46 | struct nlmsvc_binding * nlmsvc_ops; |
Trond Myklebust | 2de5987 | 2008-12-23 15:21:33 -0500 | [diff] [blame] | 47 | EXPORT_SYMBOL_GPL(nlmsvc_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | |
Ingo Molnar | 353ab6e | 2006-03-26 01:37:12 -0800 | [diff] [blame] | 49 | static DEFINE_MUTEX(nlmsvc_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | static unsigned int nlmsvc_users; |
Jeff Layton | d751a7c | 2008-02-07 16:34:55 -0500 | [diff] [blame] | 51 | static struct task_struct *nlmsvc_task; |
Jeff Layton | abd1ec4 | 2008-06-11 10:03:12 -0400 | [diff] [blame] | 52 | static struct svc_rqst *nlmsvc_rqst; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | unsigned long nlmsvc_timeout; |
| 54 | |
Stanislav Kinsbursky | a9c5d73 | 2012-01-31 15:07:57 +0400 | [diff] [blame] | 55 | int lockd_net_id; |
| 56 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | /* |
| 58 | * These can be set at insmod time (useful for NFS as root filesystem), |
| 59 | * and also changed through the sysctl interface. -- Jamie Lokier, Aug 2003 |
| 60 | */ |
| 61 | static unsigned long nlm_grace_period; |
| 62 | static unsigned long nlm_timeout = LOCKD_DFLT_TIMEO; |
| 63 | static int nlm_udpport, nlm_tcpport; |
| 64 | |
Jeff Layton | c72a476 | 2008-10-20 11:51:58 -0400 | [diff] [blame] | 65 | /* RLIM_NOFILE defaults to 1024. That seems like a reasonable default here. */ |
| 66 | static unsigned int nlm_max_connections = 1024; |
| 67 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | /* |
| 69 | * Constants needed for the sysctl interface. |
| 70 | */ |
| 71 | static const unsigned long nlm_grace_period_min = 0; |
| 72 | static const unsigned long nlm_grace_period_max = 240; |
| 73 | static const unsigned long nlm_timeout_min = 3; |
| 74 | static const unsigned long nlm_timeout_max = 20; |
| 75 | static const int nlm_port_min = 0, nlm_port_max = 65535; |
| 76 | |
Chuck Lever | 90d5b18 | 2008-03-14 14:18:30 -0400 | [diff] [blame] | 77 | #ifdef CONFIG_SYSCTL |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | static struct ctl_table_header * nlm_sysctl_table; |
Chuck Lever | 90d5b18 | 2008-03-14 14:18:30 -0400 | [diff] [blame] | 79 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | |
Marc Eshel | 9a8db97 | 2007-07-17 04:04:35 -0700 | [diff] [blame] | 81 | static unsigned long get_lockd_grace_period(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | /* Note: nlm_timeout should always be nonzero */ |
| 84 | if (nlm_grace_period) |
Marc Eshel | 9a8db97 | 2007-07-17 04:04:35 -0700 | [diff] [blame] | 85 | return roundup(nlm_grace_period, nlm_timeout) * HZ; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | else |
Marc Eshel | 9a8db97 | 2007-07-17 04:04:35 -0700 | [diff] [blame] | 87 | return nlm_timeout * 5 * HZ; |
| 88 | } |
| 89 | |
Stanislav Kinsbursky | 08d44a3 | 2012-07-25 16:56:50 +0400 | [diff] [blame] | 90 | static void grace_ender(struct work_struct *grace) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | { |
Stanislav Kinsbursky | 08d44a3 | 2012-07-25 16:56:50 +0400 | [diff] [blame] | 92 | struct delayed_work *dwork = container_of(grace, struct delayed_work, |
| 93 | work); |
| 94 | struct lockd_net *ln = container_of(dwork, struct lockd_net, |
| 95 | grace_period_end); |
| 96 | |
| 97 | locks_end_grace(&ln->lockd_manager); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | } |
| 99 | |
Stanislav Kinsbursky | 5ccb006 | 2012-07-25 16:57:22 +0400 | [diff] [blame^] | 100 | static void set_grace_period(struct net *net) |
J. Bruce Fields | c8ab5f2 | 2008-03-18 19:00:19 -0400 | [diff] [blame] | 101 | { |
J. Bruce Fields | af558e3 | 2007-09-06 12:34:25 -0400 | [diff] [blame] | 102 | unsigned long grace_period = get_lockd_grace_period(); |
Stanislav Kinsbursky | 5ccb006 | 2012-07-25 16:57:22 +0400 | [diff] [blame^] | 103 | struct lockd_net *ln = net_generic(net, lockd_net_id); |
J. Bruce Fields | c8ab5f2 | 2008-03-18 19:00:19 -0400 | [diff] [blame] | 104 | |
Stanislav Kinsbursky | 5ccb006 | 2012-07-25 16:57:22 +0400 | [diff] [blame^] | 105 | locks_start_grace(net, &ln->lockd_manager); |
Stanislav Kinsbursky | 66547b0 | 2012-07-25 16:56:43 +0400 | [diff] [blame] | 106 | cancel_delayed_work_sync(&ln->grace_period_end); |
| 107 | schedule_delayed_work(&ln->grace_period_end, grace_period); |
J. Bruce Fields | c8ab5f2 | 2008-03-18 19:00:19 -0400 | [diff] [blame] | 108 | } |
| 109 | |
J. Bruce Fields | 89996df | 2009-05-06 16:32:54 -0400 | [diff] [blame] | 110 | static void restart_grace(void) |
| 111 | { |
| 112 | if (nlmsvc_ops) { |
Stanislav Kinsbursky | 5ccb006 | 2012-07-25 16:57:22 +0400 | [diff] [blame^] | 113 | struct net *net = &init_net; |
| 114 | struct lockd_net *ln = net_generic(net, lockd_net_id); |
Stanislav Kinsbursky | 66547b0 | 2012-07-25 16:56:43 +0400 | [diff] [blame] | 115 | |
| 116 | cancel_delayed_work_sync(&ln->grace_period_end); |
Stanislav Kinsbursky | 08d44a3 | 2012-07-25 16:56:50 +0400 | [diff] [blame] | 117 | locks_end_grace(&ln->lockd_manager); |
J. Bruce Fields | 89996df | 2009-05-06 16:32:54 -0400 | [diff] [blame] | 118 | nlmsvc_invalidate_all(); |
Stanislav Kinsbursky | 5ccb006 | 2012-07-25 16:57:22 +0400 | [diff] [blame^] | 119 | set_grace_period(net); |
J. Bruce Fields | 89996df | 2009-05-06 16:32:54 -0400 | [diff] [blame] | 120 | } |
| 121 | } |
| 122 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | /* |
| 124 | * This is the lockd kernel thread |
| 125 | */ |
Jeff Layton | d751a7c | 2008-02-07 16:34:55 -0500 | [diff] [blame] | 126 | static int |
| 127 | lockd(void *vrqstp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | { |
Jeff Layton | f97c650 | 2008-04-08 15:40:08 -0400 | [diff] [blame] | 129 | int err = 0, preverr = 0; |
Jeff Layton | d751a7c | 2008-02-07 16:34:55 -0500 | [diff] [blame] | 130 | struct svc_rqst *rqstp = vrqstp; |
Stanislav Kinsbursky | 5ccb006 | 2012-07-25 16:57:22 +0400 | [diff] [blame^] | 131 | struct net *net = &init_net; |
| 132 | struct lockd_net *ln = net_generic(net, lockd_net_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | |
Jeff Layton | d751a7c | 2008-02-07 16:34:55 -0500 | [diff] [blame] | 134 | /* try_to_freeze() is called from svc_recv() */ |
Rafael J. Wysocki | 8314418 | 2007-07-17 04:03:35 -0700 | [diff] [blame] | 135 | set_freezable(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | |
Jeff Layton | d751a7c | 2008-02-07 16:34:55 -0500 | [diff] [blame] | 137 | /* Allow SIGKILL to tell lockd to drop all of its locks */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | allow_signal(SIGKILL); |
| 139 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 140 | dprintk("NFS locking service started (ver " LOCKD_VERSION ").\n"); |
| 141 | |
| 142 | if (!nlm_timeout) |
| 143 | nlm_timeout = LOCKD_DFLT_TIMEO; |
| 144 | nlmsvc_timeout = nlm_timeout * HZ; |
| 145 | |
Stanislav Kinsbursky | 5ccb006 | 2012-07-25 16:57:22 +0400 | [diff] [blame^] | 146 | set_grace_period(net); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | |
| 148 | /* |
| 149 | * The main request loop. We don't terminate until the last |
Jeff Layton | d751a7c | 2008-02-07 16:34:55 -0500 | [diff] [blame] | 150 | * NFS mount or NFS daemon has gone away. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | */ |
Jeff Layton | d751a7c | 2008-02-07 16:34:55 -0500 | [diff] [blame] | 152 | while (!kthread_should_stop()) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 153 | long timeout = MAX_SCHEDULE_TIMEOUT; |
Pavel Emelyanov | 5216a8e | 2008-02-21 10:57:45 +0300 | [diff] [blame] | 154 | RPC_IFDEBUG(char buf[RPC_MAX_ADDRBUFLEN]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 155 | |
Jeff Layton | c72a476 | 2008-10-20 11:51:58 -0400 | [diff] [blame] | 156 | /* update sv_maxconn if it has changed */ |
| 157 | rqstp->rq_server->sv_maxconn = nlm_max_connections; |
| 158 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | if (signalled()) { |
| 160 | flush_signals(current); |
J. Bruce Fields | 89996df | 2009-05-06 16:32:54 -0400 | [diff] [blame] | 161 | restart_grace(); |
Jeff Layton | d751a7c | 2008-02-07 16:34:55 -0500 | [diff] [blame] | 162 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 163 | } |
| 164 | |
J. Bruce Fields | 8fafa90 | 2008-01-24 11:11:34 -0500 | [diff] [blame] | 165 | timeout = nlmsvc_retry_blocked(); |
| 166 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 167 | /* |
| 168 | * Find a socket with data available and call its |
| 169 | * recvfrom routine. |
| 170 | */ |
NeilBrown | 6fb2b47 | 2006-10-02 02:17:50 -0700 | [diff] [blame] | 171 | err = svc_recv(rqstp, timeout); |
Jeff Layton | f97c650 | 2008-04-08 15:40:08 -0400 | [diff] [blame] | 172 | if (err == -EAGAIN || err == -EINTR) { |
| 173 | preverr = err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 175 | } |
Jeff Layton | f97c650 | 2008-04-08 15:40:08 -0400 | [diff] [blame] | 176 | if (err < 0) { |
| 177 | if (err != preverr) { |
| 178 | printk(KERN_WARNING "%s: unexpected error " |
| 179 | "from svc_recv (%d)\n", __func__, err); |
| 180 | preverr = err; |
| 181 | } |
| 182 | schedule_timeout_interruptible(HZ); |
| 183 | continue; |
| 184 | } |
| 185 | preverr = err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | |
Chuck Lever | ad06e4b | 2007-02-12 00:53:32 -0800 | [diff] [blame] | 187 | dprintk("lockd: request from %s\n", |
| 188 | svc_print_addr(rqstp, buf, sizeof(buf))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 189 | |
NeilBrown | 6fb2b47 | 2006-10-02 02:17:50 -0700 | [diff] [blame] | 190 | svc_process(rqstp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 191 | } |
Trond Myklebust | 2bd6157 | 2006-01-03 09:55:19 +0100 | [diff] [blame] | 192 | flush_signals(current); |
Stanislav Kinsbursky | 66547b0 | 2012-07-25 16:56:43 +0400 | [diff] [blame] | 193 | cancel_delayed_work_sync(&ln->grace_period_end); |
Stanislav Kinsbursky | 08d44a3 | 2012-07-25 16:56:50 +0400 | [diff] [blame] | 194 | locks_end_grace(&ln->lockd_manager); |
Jeff Layton | d751a7c | 2008-02-07 16:34:55 -0500 | [diff] [blame] | 195 | if (nlmsvc_ops) |
| 196 | nlmsvc_invalidate_all(); |
| 197 | nlm_shutdown_hosts(); |
Jeff Layton | d751a7c | 2008-02-07 16:34:55 -0500 | [diff] [blame] | 198 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 199 | } |
| 200 | |
Chuck Lever | eb16e90 | 2009-03-18 20:47:59 -0400 | [diff] [blame] | 201 | static int create_lockd_listener(struct svc_serv *serv, const char *name, |
Stanislav Kinsbursky | c228fa2 | 2012-01-31 15:07:48 +0400 | [diff] [blame] | 202 | struct net *net, const int family, |
| 203 | const unsigned short port) |
Chuck Lever | d3fe5ea | 2008-12-31 16:06:04 -0500 | [diff] [blame] | 204 | { |
| 205 | struct svc_xprt *xprt; |
| 206 | |
Stanislav Kinsbursky | c228fa2 | 2012-01-31 15:07:48 +0400 | [diff] [blame] | 207 | xprt = svc_find_xprt(serv, name, net, family, 0); |
Chuck Lever | d3fe5ea | 2008-12-31 16:06:04 -0500 | [diff] [blame] | 208 | if (xprt == NULL) |
Stanislav Kinsbursky | c228fa2 | 2012-01-31 15:07:48 +0400 | [diff] [blame] | 209 | return svc_create_xprt(serv, name, net, family, port, |
Chuck Lever | eb16e90 | 2009-03-18 20:47:59 -0400 | [diff] [blame] | 210 | SVC_SOCK_DEFAULTS); |
Chuck Lever | d3fe5ea | 2008-12-31 16:06:04 -0500 | [diff] [blame] | 211 | svc_xprt_put(xprt); |
| 212 | return 0; |
| 213 | } |
| 214 | |
Stanislav Kinsbursky | c228fa2 | 2012-01-31 15:07:48 +0400 | [diff] [blame] | 215 | static int create_lockd_family(struct svc_serv *serv, struct net *net, |
| 216 | const int family) |
Chuck Lever | eb16e90 | 2009-03-18 20:47:59 -0400 | [diff] [blame] | 217 | { |
| 218 | int err; |
| 219 | |
Stanislav Kinsbursky | c228fa2 | 2012-01-31 15:07:48 +0400 | [diff] [blame] | 220 | err = create_lockd_listener(serv, "udp", net, family, nlm_udpport); |
Chuck Lever | eb16e90 | 2009-03-18 20:47:59 -0400 | [diff] [blame] | 221 | if (err < 0) |
| 222 | return err; |
| 223 | |
Stanislav Kinsbursky | c228fa2 | 2012-01-31 15:07:48 +0400 | [diff] [blame] | 224 | return create_lockd_listener(serv, "tcp", net, family, nlm_tcpport); |
Chuck Lever | eb16e90 | 2009-03-18 20:47:59 -0400 | [diff] [blame] | 225 | } |
| 226 | |
Chuck Lever | 482fb94 | 2007-02-12 00:53:29 -0800 | [diff] [blame] | 227 | /* |
Chuck Lever | 8c3916f | 2008-10-03 17:15:23 -0400 | [diff] [blame] | 228 | * Ensure there are active UDP and TCP listeners for lockd. |
| 229 | * |
| 230 | * Even if we have only TCP NFS mounts and/or TCP NFSDs, some |
| 231 | * local services (such as rpc.statd) still require UDP, and |
| 232 | * some NFS servers do not yet support NLM over TCP. |
| 233 | * |
| 234 | * Returns zero if all listeners are available; otherwise a |
| 235 | * negative errno value is returned. |
Chuck Lever | 482fb94 | 2007-02-12 00:53:29 -0800 | [diff] [blame] | 236 | */ |
Stanislav Kinsbursky | c228fa2 | 2012-01-31 15:07:48 +0400 | [diff] [blame] | 237 | static int make_socks(struct svc_serv *serv, struct net *net) |
NeilBrown | 24e3666 | 2006-10-02 02:17:45 -0700 | [diff] [blame] | 238 | { |
Chuck Lever | 482fb94 | 2007-02-12 00:53:29 -0800 | [diff] [blame] | 239 | static int warned; |
Chuck Lever | 0dba7c2 | 2008-12-31 16:06:11 -0500 | [diff] [blame] | 240 | int err; |
Chuck Lever | 482fb94 | 2007-02-12 00:53:29 -0800 | [diff] [blame] | 241 | |
Stanislav Kinsbursky | c228fa2 | 2012-01-31 15:07:48 +0400 | [diff] [blame] | 242 | err = create_lockd_family(serv, net, PF_INET); |
Chuck Lever | 0dba7c2 | 2008-12-31 16:06:11 -0500 | [diff] [blame] | 243 | if (err < 0) |
| 244 | goto out_err; |
| 245 | |
Stanislav Kinsbursky | c228fa2 | 2012-01-31 15:07:48 +0400 | [diff] [blame] | 246 | err = create_lockd_family(serv, net, PF_INET6); |
Chuck Lever | eb16e90 | 2009-03-18 20:47:59 -0400 | [diff] [blame] | 247 | if (err < 0 && err != -EAFNOSUPPORT) |
Chuck Lever | 0dba7c2 | 2008-12-31 16:06:11 -0500 | [diff] [blame] | 248 | goto out_err; |
| 249 | |
| 250 | warned = 0; |
| 251 | return 0; |
| 252 | |
| 253 | out_err: |
| 254 | if (warned++ == 0) |
NeilBrown | 7dcf91e | 2006-10-02 02:17:52 -0700 | [diff] [blame] | 255 | printk(KERN_WARNING |
Chuck Lever | 0dba7c2 | 2008-12-31 16:06:11 -0500 | [diff] [blame] | 256 | "lockd_up: makesock failed, error=%d\n", err); |
NeilBrown | 24e3666 | 2006-10-02 02:17:45 -0700 | [diff] [blame] | 257 | return err; |
| 258 | } |
| 259 | |
Stanislav Kinsbursky | 4db7769 | 2012-04-25 18:22:40 +0400 | [diff] [blame] | 260 | static int lockd_up_net(struct svc_serv *serv, struct net *net) |
Stanislav Kinsbursky | bb2224d | 2012-01-31 15:08:05 +0400 | [diff] [blame] | 261 | { |
| 262 | struct lockd_net *ln = net_generic(net, lockd_net_id); |
Stanislav Kinsbursky | bb2224d | 2012-01-31 15:08:05 +0400 | [diff] [blame] | 263 | int error; |
| 264 | |
Stanislav Kinsbursky | 786185b | 2012-05-04 12:49:41 +0400 | [diff] [blame] | 265 | if (ln->nlmsvc_users++) |
Stanislav Kinsbursky | bb2224d | 2012-01-31 15:08:05 +0400 | [diff] [blame] | 266 | return 0; |
| 267 | |
Stanislav Kinsbursky | dbf9b5d7 | 2012-04-25 18:22:47 +0400 | [diff] [blame] | 268 | error = svc_bind(serv, net); |
Stanislav Kinsbursky | bb2224d | 2012-01-31 15:08:05 +0400 | [diff] [blame] | 269 | if (error) |
Stanislav Kinsbursky | dbf9b5d7 | 2012-04-25 18:22:47 +0400 | [diff] [blame] | 270 | goto err_bind; |
Stanislav Kinsbursky | bb2224d | 2012-01-31 15:08:05 +0400 | [diff] [blame] | 271 | |
| 272 | error = make_socks(serv, net); |
| 273 | if (error < 0) |
| 274 | goto err_socks; |
Stanislav Kinsbursky | 8dbf28e | 2012-04-25 18:23:16 +0400 | [diff] [blame] | 275 | dprintk("lockd_up_net: per-net data created; net=%p\n", net); |
Stanislav Kinsbursky | bb2224d | 2012-01-31 15:08:05 +0400 | [diff] [blame] | 276 | return 0; |
| 277 | |
| 278 | err_socks: |
| 279 | svc_rpcb_cleanup(serv, net); |
Stanislav Kinsbursky | dbf9b5d7 | 2012-04-25 18:22:47 +0400 | [diff] [blame] | 280 | err_bind: |
Stanislav Kinsbursky | 786185b | 2012-05-04 12:49:41 +0400 | [diff] [blame] | 281 | ln->nlmsvc_users--; |
Stanislav Kinsbursky | bb2224d | 2012-01-31 15:08:05 +0400 | [diff] [blame] | 282 | return error; |
| 283 | } |
| 284 | |
Stanislav Kinsbursky | 4db7769 | 2012-04-25 18:22:40 +0400 | [diff] [blame] | 285 | static void lockd_down_net(struct svc_serv *serv, struct net *net) |
Stanislav Kinsbursky | bb2224d | 2012-01-31 15:08:05 +0400 | [diff] [blame] | 286 | { |
| 287 | struct lockd_net *ln = net_generic(net, lockd_net_id); |
Stanislav Kinsbursky | bb2224d | 2012-01-31 15:08:05 +0400 | [diff] [blame] | 288 | |
| 289 | if (ln->nlmsvc_users) { |
Stanislav Kinsbursky | 3b64739 | 2012-01-31 15:08:29 +0400 | [diff] [blame] | 290 | if (--ln->nlmsvc_users == 0) { |
| 291 | nlm_shutdown_hosts_net(net); |
Stanislav Kinsbursky | bb2224d | 2012-01-31 15:08:05 +0400 | [diff] [blame] | 292 | svc_shutdown_net(serv, net); |
Stanislav Kinsbursky | 8dbf28e | 2012-04-25 18:23:16 +0400 | [diff] [blame] | 293 | dprintk("lockd_down_net: per-net data destroyed; net=%p\n", net); |
Stanislav Kinsbursky | 3b64739 | 2012-01-31 15:08:29 +0400 | [diff] [blame] | 294 | } |
Stanislav Kinsbursky | bb2224d | 2012-01-31 15:08:05 +0400 | [diff] [blame] | 295 | } else { |
| 296 | printk(KERN_ERR "lockd_down_net: no users! task=%p, net=%p\n", |
| 297 | nlmsvc_task, net); |
| 298 | BUG(); |
| 299 | } |
| 300 | } |
| 301 | |
Stanislav Kinsbursky | 3d1221d | 2012-04-25 18:23:09 +0400 | [diff] [blame] | 302 | static int lockd_start_svc(struct svc_serv *serv) |
| 303 | { |
| 304 | int error; |
| 305 | |
| 306 | if (nlmsvc_rqst) |
| 307 | return 0; |
| 308 | |
| 309 | /* |
| 310 | * Create the kernel thread and wait for it to start. |
| 311 | */ |
| 312 | nlmsvc_rqst = svc_prepare_thread(serv, &serv->sv_pools[0], NUMA_NO_NODE); |
| 313 | if (IS_ERR(nlmsvc_rqst)) { |
| 314 | error = PTR_ERR(nlmsvc_rqst); |
| 315 | printk(KERN_WARNING |
| 316 | "lockd_up: svc_rqst allocation failed, error=%d\n", |
| 317 | error); |
| 318 | goto out_rqst; |
| 319 | } |
| 320 | |
| 321 | svc_sock_update_bufs(serv); |
| 322 | serv->sv_maxconn = nlm_max_connections; |
| 323 | |
| 324 | nlmsvc_task = kthread_run(lockd, nlmsvc_rqst, serv->sv_name); |
| 325 | if (IS_ERR(nlmsvc_task)) { |
| 326 | error = PTR_ERR(nlmsvc_task); |
| 327 | printk(KERN_WARNING |
| 328 | "lockd_up: kthread_run failed, error=%d\n", error); |
| 329 | goto out_task; |
| 330 | } |
| 331 | dprintk("lockd_up: service started\n"); |
| 332 | return 0; |
| 333 | |
| 334 | out_task: |
| 335 | svc_exit_thread(nlmsvc_rqst); |
| 336 | nlmsvc_task = NULL; |
| 337 | out_rqst: |
| 338 | nlmsvc_rqst = NULL; |
| 339 | return error; |
| 340 | } |
| 341 | |
Stanislav Kinsbursky | 2445223 | 2012-04-25 18:22:54 +0400 | [diff] [blame] | 342 | static struct svc_serv *lockd_create_svc(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 343 | { |
Jeff Layton | d751a7c | 2008-02-07 16:34:55 -0500 | [diff] [blame] | 344 | struct svc_serv *serv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 345 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | * Check whether we're already up and running. |
| 348 | */ |
Stanislav Kinsbursky | bb2224d | 2012-01-31 15:08:05 +0400 | [diff] [blame] | 349 | if (nlmsvc_rqst) { |
Stanislav Kinsbursky | 2445223 | 2012-04-25 18:22:54 +0400 | [diff] [blame] | 350 | /* |
| 351 | * Note: increase service usage, because later in case of error |
| 352 | * svc_destroy() will be called. |
| 353 | */ |
| 354 | svc_get(nlmsvc_rqst->rq_server); |
| 355 | return nlmsvc_rqst->rq_server; |
Stanislav Kinsbursky | bb2224d | 2012-01-31 15:08:05 +0400 | [diff] [blame] | 356 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 357 | |
| 358 | /* |
| 359 | * Sanity check: if there's no pid, |
| 360 | * we should be the first user ... |
| 361 | */ |
NeilBrown | 4a3ae42 | 2006-10-02 02:17:53 -0700 | [diff] [blame] | 362 | if (nlmsvc_users) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 363 | printk(KERN_WARNING |
| 364 | "lockd_up: no pid, %d users??\n", nlmsvc_users); |
| 365 | |
Chuck Lever | 49a9072 | 2009-03-18 20:46:29 -0400 | [diff] [blame] | 366 | serv = svc_create(&nlmsvc_program, LOCKD_BUFSIZE, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | if (!serv) { |
| 368 | printk(KERN_WARNING "lockd_up: create service failed\n"); |
Stanislav Kinsbursky | 2445223 | 2012-04-25 18:22:54 +0400 | [diff] [blame] | 369 | return ERR_PTR(-ENOMEM); |
| 370 | } |
Stanislav Kinsbursky | 8dbf28e | 2012-04-25 18:23:16 +0400 | [diff] [blame] | 371 | dprintk("lockd_up: service created\n"); |
Stanislav Kinsbursky | 2445223 | 2012-04-25 18:22:54 +0400 | [diff] [blame] | 372 | return serv; |
| 373 | } |
| 374 | |
| 375 | /* |
| 376 | * Bring up the lockd process if it's not already up. |
| 377 | */ |
| 378 | int lockd_up(struct net *net) |
| 379 | { |
| 380 | struct svc_serv *serv; |
Stanislav Kinsbursky | 7d13ec7 | 2012-04-25 18:23:02 +0400 | [diff] [blame] | 381 | int error; |
Stanislav Kinsbursky | 2445223 | 2012-04-25 18:22:54 +0400 | [diff] [blame] | 382 | |
| 383 | mutex_lock(&nlmsvc_mutex); |
| 384 | |
| 385 | serv = lockd_create_svc(); |
| 386 | if (IS_ERR(serv)) { |
| 387 | error = PTR_ERR(serv); |
| 388 | goto err_create; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 389 | } |
| 390 | |
Stanislav Kinsbursky | dbf9b5d7 | 2012-04-25 18:22:47 +0400 | [diff] [blame] | 391 | error = lockd_up_net(serv, net); |
Chuck Lever | 8c3916f | 2008-10-03 17:15:23 -0400 | [diff] [blame] | 392 | if (error < 0) |
Stanislav Kinsbursky | dbf9b5d7 | 2012-04-25 18:22:47 +0400 | [diff] [blame] | 393 | goto err_net; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | |
Stanislav Kinsbursky | 3d1221d | 2012-04-25 18:23:09 +0400 | [diff] [blame] | 395 | error = lockd_start_svc(serv); |
| 396 | if (error < 0) |
Stanislav Kinsbursky | 786185b | 2012-05-04 12:49:41 +0400 | [diff] [blame] | 397 | goto err_start; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 398 | |
Stanislav Kinsbursky | 7d13ec7 | 2012-04-25 18:23:02 +0400 | [diff] [blame] | 399 | nlmsvc_users++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 400 | /* |
| 401 | * Note: svc_serv structures have an initial use count of 1, |
| 402 | * so we exit through here on both success and failure. |
| 403 | */ |
Stanislav Kinsbursky | dbf9b5d7 | 2012-04-25 18:22:47 +0400 | [diff] [blame] | 404 | err_net: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | svc_destroy(serv); |
Stanislav Kinsbursky | 2445223 | 2012-04-25 18:22:54 +0400 | [diff] [blame] | 406 | err_create: |
Ingo Molnar | 353ab6e | 2006-03-26 01:37:12 -0800 | [diff] [blame] | 407 | mutex_unlock(&nlmsvc_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 408 | return error; |
Stanislav Kinsbursky | 786185b | 2012-05-04 12:49:41 +0400 | [diff] [blame] | 409 | |
| 410 | err_start: |
Stanislav Kinsbursky | 4db7769 | 2012-04-25 18:22:40 +0400 | [diff] [blame] | 411 | lockd_down_net(serv, net); |
Stanislav Kinsbursky | dbf9b5d7 | 2012-04-25 18:22:47 +0400 | [diff] [blame] | 412 | goto err_net; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 413 | } |
Trond Myklebust | 2de5987 | 2008-12-23 15:21:33 -0500 | [diff] [blame] | 414 | EXPORT_SYMBOL_GPL(lockd_up); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 415 | |
| 416 | /* |
| 417 | * Decrement the user count and bring down lockd if we're the last. |
| 418 | */ |
| 419 | void |
Stanislav Kinsbursky | e3f70ea | 2012-03-29 18:54:33 +0400 | [diff] [blame] | 420 | lockd_down(struct net *net) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 421 | { |
Ingo Molnar | 353ab6e | 2006-03-26 01:37:12 -0800 | [diff] [blame] | 422 | mutex_lock(&nlmsvc_mutex); |
Stanislav Kinsbursky | 4db7769 | 2012-04-25 18:22:40 +0400 | [diff] [blame] | 423 | lockd_down_net(nlmsvc_rqst->rq_server, net); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 424 | if (nlmsvc_users) { |
Stanislav Kinsbursky | 786185b | 2012-05-04 12:49:41 +0400 | [diff] [blame] | 425 | if (--nlmsvc_users) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 426 | goto out; |
Jeff Layton | d751a7c | 2008-02-07 16:34:55 -0500 | [diff] [blame] | 427 | } else { |
| 428 | printk(KERN_ERR "lockd_down: no users! task=%p\n", |
| 429 | nlmsvc_task); |
| 430 | BUG(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 431 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 432 | |
Jeff Layton | d751a7c | 2008-02-07 16:34:55 -0500 | [diff] [blame] | 433 | if (!nlmsvc_task) { |
| 434 | printk(KERN_ERR "lockd_down: no lockd running.\n"); |
| 435 | BUG(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 436 | } |
Jeff Layton | d751a7c | 2008-02-07 16:34:55 -0500 | [diff] [blame] | 437 | kthread_stop(nlmsvc_task); |
Stanislav Kinsbursky | 8dbf28e | 2012-04-25 18:23:16 +0400 | [diff] [blame] | 438 | dprintk("lockd_down: service stopped\n"); |
Jeff Layton | abd1ec4 | 2008-06-11 10:03:12 -0400 | [diff] [blame] | 439 | svc_exit_thread(nlmsvc_rqst); |
Stanislav Kinsbursky | 8dbf28e | 2012-04-25 18:23:16 +0400 | [diff] [blame] | 440 | dprintk("lockd_down: service destroyed\n"); |
Jeff Layton | abd1ec4 | 2008-06-11 10:03:12 -0400 | [diff] [blame] | 441 | nlmsvc_task = NULL; |
| 442 | nlmsvc_rqst = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 443 | out: |
Ingo Molnar | 353ab6e | 2006-03-26 01:37:12 -0800 | [diff] [blame] | 444 | mutex_unlock(&nlmsvc_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 445 | } |
Trond Myklebust | 2de5987 | 2008-12-23 15:21:33 -0500 | [diff] [blame] | 446 | EXPORT_SYMBOL_GPL(lockd_down); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 447 | |
Chuck Lever | 90d5b18 | 2008-03-14 14:18:30 -0400 | [diff] [blame] | 448 | #ifdef CONFIG_SYSCTL |
| 449 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | /* |
| 451 | * Sysctl parameters (same as module parameters, different interface). |
| 452 | */ |
| 453 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 454 | static ctl_table nlm_sysctls[] = { |
| 455 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 456 | .procname = "nlm_grace_period", |
| 457 | .data = &nlm_grace_period, |
Steve Dickson | 7ee91ec | 2005-07-13 01:10:47 -0700 | [diff] [blame] | 458 | .maxlen = sizeof(unsigned long), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 459 | .mode = 0644, |
Eric W. Biederman | 6d45611 | 2009-11-16 03:11:48 -0800 | [diff] [blame] | 460 | .proc_handler = proc_doulongvec_minmax, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 461 | .extra1 = (unsigned long *) &nlm_grace_period_min, |
| 462 | .extra2 = (unsigned long *) &nlm_grace_period_max, |
| 463 | }, |
| 464 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 465 | .procname = "nlm_timeout", |
| 466 | .data = &nlm_timeout, |
Steve Dickson | 7ee91ec | 2005-07-13 01:10:47 -0700 | [diff] [blame] | 467 | .maxlen = sizeof(unsigned long), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 468 | .mode = 0644, |
Eric W. Biederman | 6d45611 | 2009-11-16 03:11:48 -0800 | [diff] [blame] | 469 | .proc_handler = proc_doulongvec_minmax, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 470 | .extra1 = (unsigned long *) &nlm_timeout_min, |
| 471 | .extra2 = (unsigned long *) &nlm_timeout_max, |
| 472 | }, |
| 473 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 474 | .procname = "nlm_udpport", |
| 475 | .data = &nlm_udpport, |
| 476 | .maxlen = sizeof(int), |
| 477 | .mode = 0644, |
Eric W. Biederman | 6d45611 | 2009-11-16 03:11:48 -0800 | [diff] [blame] | 478 | .proc_handler = proc_dointvec_minmax, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 479 | .extra1 = (int *) &nlm_port_min, |
| 480 | .extra2 = (int *) &nlm_port_max, |
| 481 | }, |
| 482 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 483 | .procname = "nlm_tcpport", |
| 484 | .data = &nlm_tcpport, |
| 485 | .maxlen = sizeof(int), |
| 486 | .mode = 0644, |
Eric W. Biederman | 6d45611 | 2009-11-16 03:11:48 -0800 | [diff] [blame] | 487 | .proc_handler = proc_dointvec_minmax, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 488 | .extra1 = (int *) &nlm_port_min, |
| 489 | .extra2 = (int *) &nlm_port_max, |
| 490 | }, |
Olaf Kirch | abd1f50 | 2006-10-04 02:16:01 -0700 | [diff] [blame] | 491 | { |
Olaf Kirch | abd1f50 | 2006-10-04 02:16:01 -0700 | [diff] [blame] | 492 | .procname = "nsm_use_hostnames", |
| 493 | .data = &nsm_use_hostnames, |
| 494 | .maxlen = sizeof(int), |
| 495 | .mode = 0644, |
Eric W. Biederman | 6d45611 | 2009-11-16 03:11:48 -0800 | [diff] [blame] | 496 | .proc_handler = proc_dointvec, |
Olaf Kirch | abd1f50 | 2006-10-04 02:16:01 -0700 | [diff] [blame] | 497 | }, |
Olaf Kirch | 460f5ca | 2006-10-04 02:16:03 -0700 | [diff] [blame] | 498 | { |
Olaf Kirch | 460f5ca | 2006-10-04 02:16:03 -0700 | [diff] [blame] | 499 | .procname = "nsm_local_state", |
| 500 | .data = &nsm_local_state, |
| 501 | .maxlen = sizeof(int), |
| 502 | .mode = 0644, |
Eric W. Biederman | 6d45611 | 2009-11-16 03:11:48 -0800 | [diff] [blame] | 503 | .proc_handler = proc_dointvec, |
Olaf Kirch | 460f5ca | 2006-10-04 02:16:03 -0700 | [diff] [blame] | 504 | }, |
Eric W. Biederman | ab09203 | 2009-11-05 14:25:10 -0800 | [diff] [blame] | 505 | { } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 506 | }; |
| 507 | |
| 508 | static ctl_table nlm_sysctl_dir[] = { |
| 509 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 510 | .procname = "nfs", |
| 511 | .mode = 0555, |
| 512 | .child = nlm_sysctls, |
| 513 | }, |
Eric W. Biederman | ab09203 | 2009-11-05 14:25:10 -0800 | [diff] [blame] | 514 | { } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 515 | }; |
| 516 | |
| 517 | static ctl_table nlm_sysctl_root[] = { |
| 518 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 519 | .procname = "fs", |
| 520 | .mode = 0555, |
| 521 | .child = nlm_sysctl_dir, |
| 522 | }, |
Eric W. Biederman | ab09203 | 2009-11-05 14:25:10 -0800 | [diff] [blame] | 523 | { } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 524 | }; |
| 525 | |
Chuck Lever | 90d5b18 | 2008-03-14 14:18:30 -0400 | [diff] [blame] | 526 | #endif /* CONFIG_SYSCTL */ |
| 527 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 528 | /* |
Robert P. J. Day | 405ae7d | 2007-02-17 19:13:42 +0100 | [diff] [blame] | 529 | * Module (and sysfs) parameters. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 530 | */ |
| 531 | |
| 532 | #define param_set_min_max(name, type, which_strtol, min, max) \ |
| 533 | static int param_set_##name(const char *val, struct kernel_param *kp) \ |
| 534 | { \ |
| 535 | char *endp; \ |
| 536 | __typeof__(type) num = which_strtol(val, &endp, 0); \ |
| 537 | if (endp == val || *endp || num < (min) || num > (max)) \ |
| 538 | return -EINVAL; \ |
NeilBrown | de5b8e8 | 2012-02-07 15:35:42 +1100 | [diff] [blame] | 539 | *((type *) kp->arg) = num; \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 540 | return 0; \ |
| 541 | } |
| 542 | |
| 543 | static inline int is_callback(u32 proc) |
| 544 | { |
| 545 | return proc == NLMPROC_GRANTED |
| 546 | || proc == NLMPROC_GRANTED_MSG |
| 547 | || proc == NLMPROC_TEST_RES |
| 548 | || proc == NLMPROC_LOCK_RES |
| 549 | || proc == NLMPROC_CANCEL_RES |
| 550 | || proc == NLMPROC_UNLOCK_RES |
| 551 | || proc == NLMPROC_NSM_NOTIFY; |
| 552 | } |
| 553 | |
| 554 | |
| 555 | static int lockd_authenticate(struct svc_rqst *rqstp) |
| 556 | { |
| 557 | rqstp->rq_client = NULL; |
| 558 | switch (rqstp->rq_authop->flavour) { |
| 559 | case RPC_AUTH_NULL: |
| 560 | case RPC_AUTH_UNIX: |
| 561 | if (rqstp->rq_proc == 0) |
| 562 | return SVC_OK; |
| 563 | if (is_callback(rqstp->rq_proc)) { |
| 564 | /* Leave it to individual procedures to |
| 565 | * call nlmsvc_lookup_host(rqstp) |
| 566 | */ |
| 567 | return SVC_OK; |
| 568 | } |
| 569 | return svc_set_client(rqstp); |
| 570 | } |
| 571 | return SVC_DENIED; |
| 572 | } |
| 573 | |
| 574 | |
| 575 | param_set_min_max(port, int, simple_strtol, 0, 65535) |
| 576 | param_set_min_max(grace_period, unsigned long, simple_strtoul, |
| 577 | nlm_grace_period_min, nlm_grace_period_max) |
| 578 | param_set_min_max(timeout, unsigned long, simple_strtoul, |
| 579 | nlm_timeout_min, nlm_timeout_max) |
| 580 | |
| 581 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); |
| 582 | MODULE_DESCRIPTION("NFS file locking service version " LOCKD_VERSION "."); |
| 583 | MODULE_LICENSE("GPL"); |
| 584 | |
| 585 | module_param_call(nlm_grace_period, param_set_grace_period, param_get_ulong, |
| 586 | &nlm_grace_period, 0644); |
| 587 | module_param_call(nlm_timeout, param_set_timeout, param_get_ulong, |
| 588 | &nlm_timeout, 0644); |
| 589 | module_param_call(nlm_udpport, param_set_port, param_get_int, |
| 590 | &nlm_udpport, 0644); |
| 591 | module_param_call(nlm_tcpport, param_set_port, param_get_int, |
| 592 | &nlm_tcpport, 0644); |
Olaf Kirch | abd1f50 | 2006-10-04 02:16:01 -0700 | [diff] [blame] | 593 | module_param(nsm_use_hostnames, bool, 0644); |
Jeff Layton | c72a476 | 2008-10-20 11:51:58 -0400 | [diff] [blame] | 594 | module_param(nlm_max_connections, uint, 0644); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 595 | |
Stanislav Kinsbursky | a9c5d73 | 2012-01-31 15:07:57 +0400 | [diff] [blame] | 596 | static int lockd_init_net(struct net *net) |
| 597 | { |
Stanislav Kinsbursky | 66547b0 | 2012-07-25 16:56:43 +0400 | [diff] [blame] | 598 | struct lockd_net *ln = net_generic(net, lockd_net_id); |
| 599 | |
| 600 | INIT_DELAYED_WORK(&ln->grace_period_end, grace_ender); |
Stanislav Kinsbursky | db9c455 | 2012-07-25 16:57:13 +0400 | [diff] [blame] | 601 | INIT_LIST_HEAD(&ln->grace_list); |
Stanislav Kinsbursky | a9c5d73 | 2012-01-31 15:07:57 +0400 | [diff] [blame] | 602 | return 0; |
| 603 | } |
| 604 | |
| 605 | static void lockd_exit_net(struct net *net) |
| 606 | { |
| 607 | } |
| 608 | |
| 609 | static struct pernet_operations lockd_net_ops = { |
| 610 | .init = lockd_init_net, |
| 611 | .exit = lockd_exit_net, |
| 612 | .id = &lockd_net_id, |
| 613 | .size = sizeof(struct lockd_net), |
| 614 | }; |
| 615 | |
| 616 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 617 | /* |
| 618 | * Initialising and terminating the module. |
| 619 | */ |
| 620 | |
| 621 | static int __init init_nlm(void) |
| 622 | { |
Stanislav Kinsbursky | a9c5d73 | 2012-01-31 15:07:57 +0400 | [diff] [blame] | 623 | int err; |
| 624 | |
Chuck Lever | 90d5b18 | 2008-03-14 14:18:30 -0400 | [diff] [blame] | 625 | #ifdef CONFIG_SYSCTL |
Stanislav Kinsbursky | a9c5d73 | 2012-01-31 15:07:57 +0400 | [diff] [blame] | 626 | err = -ENOMEM; |
Eric W. Biederman | 0b4d414 | 2007-02-14 00:34:09 -0800 | [diff] [blame] | 627 | nlm_sysctl_table = register_sysctl_table(nlm_sysctl_root); |
Stanislav Kinsbursky | a9c5d73 | 2012-01-31 15:07:57 +0400 | [diff] [blame] | 628 | if (nlm_sysctl_table == NULL) |
| 629 | goto err_sysctl; |
Chuck Lever | 90d5b18 | 2008-03-14 14:18:30 -0400 | [diff] [blame] | 630 | #endif |
Stanislav Kinsbursky | a9c5d73 | 2012-01-31 15:07:57 +0400 | [diff] [blame] | 631 | err = register_pernet_subsys(&lockd_net_ops); |
| 632 | if (err) |
| 633 | goto err_pernet; |
| 634 | return 0; |
| 635 | |
| 636 | err_pernet: |
| 637 | #ifdef CONFIG_SYSCTL |
| 638 | unregister_sysctl_table(nlm_sysctl_table); |
| 639 | #endif |
| 640 | err_sysctl: |
| 641 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 642 | } |
| 643 | |
| 644 | static void __exit exit_nlm(void) |
| 645 | { |
| 646 | /* FIXME: delete all NLM clients */ |
| 647 | nlm_shutdown_hosts(); |
Stanislav Kinsbursky | a9c5d73 | 2012-01-31 15:07:57 +0400 | [diff] [blame] | 648 | unregister_pernet_subsys(&lockd_net_ops); |
Chuck Lever | 90d5b18 | 2008-03-14 14:18:30 -0400 | [diff] [blame] | 649 | #ifdef CONFIG_SYSCTL |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 650 | unregister_sysctl_table(nlm_sysctl_table); |
Chuck Lever | 90d5b18 | 2008-03-14 14:18:30 -0400 | [diff] [blame] | 651 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 652 | } |
| 653 | |
| 654 | module_init(init_nlm); |
| 655 | module_exit(exit_nlm); |
| 656 | |
| 657 | /* |
| 658 | * Define NLM program and procedures |
| 659 | */ |
| 660 | static struct svc_version nlmsvc_version1 = { |
| 661 | .vs_vers = 1, |
| 662 | .vs_nproc = 17, |
| 663 | .vs_proc = nlmsvc_procedures, |
| 664 | .vs_xdrsize = NLMSVC_XDRSIZE, |
| 665 | }; |
| 666 | static struct svc_version nlmsvc_version3 = { |
| 667 | .vs_vers = 3, |
| 668 | .vs_nproc = 24, |
| 669 | .vs_proc = nlmsvc_procedures, |
| 670 | .vs_xdrsize = NLMSVC_XDRSIZE, |
| 671 | }; |
| 672 | #ifdef CONFIG_LOCKD_V4 |
| 673 | static struct svc_version nlmsvc_version4 = { |
| 674 | .vs_vers = 4, |
| 675 | .vs_nproc = 24, |
| 676 | .vs_proc = nlmsvc_procedures4, |
| 677 | .vs_xdrsize = NLMSVC_XDRSIZE, |
| 678 | }; |
| 679 | #endif |
| 680 | static struct svc_version * nlmsvc_version[] = { |
| 681 | [1] = &nlmsvc_version1, |
| 682 | [3] = &nlmsvc_version3, |
| 683 | #ifdef CONFIG_LOCKD_V4 |
| 684 | [4] = &nlmsvc_version4, |
| 685 | #endif |
| 686 | }; |
| 687 | |
| 688 | static struct svc_stat nlmsvc_stats; |
| 689 | |
Tobias Klauser | e8c96f8 | 2006-03-24 03:15:34 -0800 | [diff] [blame] | 690 | #define NLM_NRVERS ARRAY_SIZE(nlmsvc_version) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 691 | static struct svc_program nlmsvc_program = { |
| 692 | .pg_prog = NLM_PROGRAM, /* program number */ |
| 693 | .pg_nvers = NLM_NRVERS, /* number of entries in nlmsvc_version */ |
| 694 | .pg_vers = nlmsvc_version, /* version table */ |
| 695 | .pg_name = "lockd", /* service name */ |
| 696 | .pg_class = "nfsd", /* share authentication with nfsd */ |
| 697 | .pg_stats = &nlmsvc_stats, /* stats table */ |
| 698 | .pg_authenticate = &lockd_authenticate /* export authentication */ |
| 699 | }; |