Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/include/linux/lockd/lockd.h |
| 3 | * |
| 4 | * General-purpose lockd include file. |
| 5 | * |
| 6 | * Copyright (C) 1996 Olaf Kirch <okir@monad.swb.de> |
| 7 | */ |
| 8 | |
| 9 | #ifndef LINUX_LOCKD_LOCKD_H |
| 10 | #define LINUX_LOCKD_LOCKD_H |
| 11 | |
| 12 | #ifdef __KERNEL__ |
| 13 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 14 | #include <linux/in.h> |
Chuck Lever | 781b61a | 2008-09-03 14:36:01 -0400 | [diff] [blame] | 15 | #include <linux/in6.h> |
| 16 | #include <net/ipv6.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | #include <linux/fs.h> |
Trond Myklebust | 6849c0c | 2006-03-20 13:44:39 -0500 | [diff] [blame] | 18 | #include <linux/kref.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | #include <linux/utsname.h> |
| 20 | #include <linux/nfsd/nfsfh.h> |
| 21 | #include <linux/lockd/bind.h> |
| 22 | #include <linux/lockd/xdr.h> |
| 23 | #ifdef CONFIG_LOCKD_V4 |
| 24 | #include <linux/lockd/xdr4.h> |
| 25 | #endif |
| 26 | #include <linux/lockd/debug.h> |
| 27 | |
| 28 | /* |
| 29 | * Version string |
| 30 | */ |
| 31 | #define LOCKD_VERSION "0.5" |
| 32 | |
| 33 | /* |
| 34 | * Default timeout for RPC calls (seconds) |
| 35 | */ |
| 36 | #define LOCKD_DFLT_TIMEO 10 |
| 37 | |
| 38 | /* |
| 39 | * Lockd host handle (used both by the client and server personality). |
| 40 | */ |
| 41 | struct nlm_host { |
Olaf Kirch | 0cea327 | 2006-10-04 02:15:56 -0700 | [diff] [blame] | 42 | struct hlist_node h_hash; /* doubly linked list */ |
Chuck Lever | b4ed58f | 2008-09-03 14:35:39 -0400 | [diff] [blame] | 43 | struct sockaddr_storage h_addr; /* peer address */ |
| 44 | size_t h_addrlen; |
Chuck Lever | 90151e6 | 2008-09-03 14:35:46 -0400 | [diff] [blame] | 45 | struct sockaddr_storage h_srcaddr; /* our address (optional) */ |
Trond Myklebust | 8e35f8e | 2010-11-02 09:11:55 -0400 | [diff] [blame] | 46 | size_t h_srcaddrlen; |
Chuck Lever | 7538ce1 | 2008-12-04 14:19:45 -0500 | [diff] [blame] | 47 | struct rpc_clnt *h_rpcclnt; /* RPC client to talk to peer */ |
| 48 | char *h_name; /* remote hostname */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | u32 h_version; /* interface version */ |
| 50 | unsigned short h_proto; /* transport proto */ |
| 51 | unsigned short h_reclaiming : 1, |
| 52 | h_server : 1, /* server side, not client side */ |
Chuck Lever | 0cb2659 | 2008-12-23 15:21:38 -0500 | [diff] [blame] | 53 | h_noresvport : 1, |
NeilBrown | 350fce8 | 2006-10-04 02:16:00 -0700 | [diff] [blame] | 54 | h_inuse : 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | wait_queue_head_t h_gracewait; /* wait while reclaiming */ |
Trond Myklebust | 28df955 | 2006-06-09 09:40:27 -0400 | [diff] [blame] | 56 | struct rw_semaphore h_rwsem; /* Reboot recovery lock */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | u32 h_state; /* pseudo-state counter */ |
| 58 | u32 h_nsmstate; /* true remote NSM state */ |
| 59 | u32 h_pidcount; /* Pseudopids */ |
| 60 | atomic_t h_count; /* reference count */ |
Trond Myklebust | 5046791 | 2006-06-09 09:40:24 -0400 | [diff] [blame] | 61 | struct mutex h_mutex; /* mutex for pmap binding */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | unsigned long h_nextrebind; /* next portmap call */ |
| 63 | unsigned long h_expires; /* eligible for GC */ |
| 64 | struct list_head h_lockowners; /* Lockowners for the client */ |
| 65 | spinlock_t h_lock; |
Christoph Hellwig | 26bcbf9 | 2006-03-20 13:44:40 -0500 | [diff] [blame] | 66 | struct list_head h_granted; /* Locks in GRANTED state */ |
| 67 | struct list_head h_reclaim; /* Locks in RECLAIM state */ |
Chuck Lever | 7538ce1 | 2008-12-04 14:19:45 -0500 | [diff] [blame] | 68 | struct nsm_handle *h_nsmhandle; /* NSM status handle */ |
Chuck Lever | 1df40b6 | 2008-12-04 14:19:53 -0500 | [diff] [blame] | 69 | char *h_addrbuf; /* address eyecatcher */ |
Olaf Kirch | 8dead0d | 2006-10-04 02:15:53 -0700 | [diff] [blame] | 70 | }; |
| 71 | |
Chuck Lever | bc99580 | 2008-12-04 14:20:08 -0500 | [diff] [blame] | 72 | /* |
| 73 | * The largest string sm_addrbuf should hold is a full-size IPv6 address |
| 74 | * (no "::" anywhere) with a scope ID. The buffer size is computed to |
| 75 | * hold eight groups of colon-separated four-hex-digit numbers, a |
| 76 | * percent sign, a scope id (at most 32 bits, in decimal), and NUL. |
| 77 | */ |
| 78 | #define NSM_ADDRBUF ((8 * 4 + 7) + (1 + 10) + 1) |
| 79 | |
Olaf Kirch | 8dead0d | 2006-10-04 02:15:53 -0700 | [diff] [blame] | 80 | struct nsm_handle { |
| 81 | struct list_head sm_link; |
| 82 | atomic_t sm_count; |
Chuck Lever | 29ed140 | 2008-12-04 14:20:46 -0500 | [diff] [blame] | 83 | char *sm_mon_name; |
Chuck Lever | f47534f | 2008-12-04 14:20:38 -0500 | [diff] [blame] | 84 | char *sm_name; |
Chuck Lever | 7e9d7746 | 2008-09-03 14:35:54 -0400 | [diff] [blame] | 85 | struct sockaddr_storage sm_addr; |
| 86 | size_t sm_addrlen; |
Olaf Kirch | 8dead0d | 2006-10-04 02:15:53 -0700 | [diff] [blame] | 87 | unsigned int sm_monitored : 1, |
| 88 | sm_sticky : 1; /* don't unmonitor */ |
Chuck Lever | 7e44d3b | 2008-12-05 19:03:16 -0500 | [diff] [blame] | 89 | struct nsm_private sm_priv; |
Chuck Lever | bc99580 | 2008-12-04 14:20:08 -0500 | [diff] [blame] | 90 | char sm_addrbuf[NSM_ADDRBUF]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | }; |
| 92 | |
| 93 | /* |
Chuck Lever | b4ed58f | 2008-09-03 14:35:39 -0400 | [diff] [blame] | 94 | * Rigorous type checking on sockaddr type conversions |
| 95 | */ |
| 96 | static inline struct sockaddr_in *nlm_addr_in(const struct nlm_host *host) |
| 97 | { |
| 98 | return (struct sockaddr_in *)&host->h_addr; |
| 99 | } |
| 100 | |
| 101 | static inline struct sockaddr *nlm_addr(const struct nlm_host *host) |
| 102 | { |
| 103 | return (struct sockaddr *)&host->h_addr; |
| 104 | } |
| 105 | |
Chuck Lever | 90151e6 | 2008-09-03 14:35:46 -0400 | [diff] [blame] | 106 | static inline struct sockaddr_in *nlm_srcaddr_in(const struct nlm_host *host) |
| 107 | { |
| 108 | return (struct sockaddr_in *)&host->h_srcaddr; |
| 109 | } |
| 110 | |
| 111 | static inline struct sockaddr *nlm_srcaddr(const struct nlm_host *host) |
| 112 | { |
| 113 | return (struct sockaddr *)&host->h_srcaddr; |
| 114 | } |
| 115 | |
Chuck Lever | b4ed58f | 2008-09-03 14:35:39 -0400 | [diff] [blame] | 116 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | * Map an fl_owner_t into a unique 32-bit "pid" |
| 118 | */ |
| 119 | struct nlm_lockowner { |
| 120 | struct list_head list; |
| 121 | atomic_t count; |
| 122 | |
| 123 | struct nlm_host *host; |
| 124 | fl_owner_t owner; |
| 125 | uint32_t pid; |
| 126 | }; |
| 127 | |
Trond Myklebust | ecdbf76 | 2005-06-22 17:16:31 +0000 | [diff] [blame] | 128 | struct nlm_wait; |
| 129 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | /* |
| 131 | * Memory chunk for NLM client RPC request. |
| 132 | */ |
Chuck Lever | 511d2e8 | 2007-03-29 16:47:47 -0400 | [diff] [blame] | 133 | #define NLMCLNT_OHSIZE ((__NEW_UTS_LEN) + 10u) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | struct nlm_rqst { |
Trond Myklebust | 5e7f37a | 2008-04-01 18:58:49 -0400 | [diff] [blame] | 135 | atomic_t a_count; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | unsigned int a_flags; /* initial RPC task flags */ |
| 137 | struct nlm_host * a_host; /* host handle */ |
| 138 | struct nlm_args a_args; /* arguments */ |
| 139 | struct nlm_res a_res; /* result */ |
Trond Myklebust | 9273723 | 2006-03-20 13:44:45 -0500 | [diff] [blame] | 140 | struct nlm_block * a_block; |
Trond Myklebust | aaaa994 | 2006-02-01 12:18:25 -0500 | [diff] [blame] | 141 | unsigned int a_retries; /* Retry count */ |
Trond Myklebust | 9273723 | 2006-03-20 13:44:45 -0500 | [diff] [blame] | 142 | u8 a_owner[NLMCLNT_OHSIZE]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | }; |
| 144 | |
| 145 | /* |
| 146 | * This struct describes a file held open by lockd on behalf of |
| 147 | * an NFS client. |
| 148 | */ |
| 149 | struct nlm_file { |
Olaf Kirch | 07ba806 | 2006-10-04 02:15:58 -0700 | [diff] [blame] | 150 | struct hlist_node f_list; /* linked list */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | struct nfs_fh f_handle; /* NFS file handle */ |
| 152 | struct file * f_file; /* VFS file pointer */ |
| 153 | struct nlm_share * f_shares; /* DOS shares */ |
Olaf Kirch | 68a2d76c | 2006-10-04 02:15:57 -0700 | [diff] [blame] | 154 | struct list_head f_blocks; /* blocked locks */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 155 | unsigned int f_locks; /* guesstimate # of locks */ |
| 156 | unsigned int f_count; /* reference count */ |
Neil Brown | 89e63ef | 2006-10-04 02:16:06 -0700 | [diff] [blame] | 157 | struct mutex f_mutex; /* avoid concurrent access */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | }; |
| 159 | |
| 160 | /* |
| 161 | * This is a server block (i.e. a lock requested by some client which |
| 162 | * couldn't be granted because of a conflicting lock). |
| 163 | */ |
| 164 | #define NLM_NEVER (~(unsigned long) 0) |
Marc Eshel | 2b36f41 | 2006-11-28 16:26:47 -0500 | [diff] [blame] | 165 | /* timeout on non-blocking call: */ |
| 166 | #define NLM_TIMEOUT (7 * HZ) |
| 167 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | struct nlm_block { |
Trond Myklebust | 6849c0c | 2006-03-20 13:44:39 -0500 | [diff] [blame] | 169 | struct kref b_count; /* Reference count */ |
Olaf Kirch | 68a2d76c | 2006-10-04 02:15:57 -0700 | [diff] [blame] | 170 | struct list_head b_list; /* linked list of all blocks */ |
| 171 | struct list_head b_flist; /* linked list (per file) */ |
Trond Myklebust | 9273723 | 2006-03-20 13:44:45 -0500 | [diff] [blame] | 172 | struct nlm_rqst * b_call; /* RPC args & callback info */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | struct svc_serv * b_daemon; /* NLM service */ |
| 174 | struct nlm_host * b_host; /* host handle for RPC clnt */ |
| 175 | unsigned long b_when; /* next re-xmit */ |
| 176 | unsigned int b_id; /* block id */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | unsigned char b_granted; /* VFS granted lock */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | struct nlm_file * b_file; /* file in question */ |
Marc Eshel | 2b36f41 | 2006-11-28 16:26:47 -0500 | [diff] [blame] | 179 | struct cache_req * b_cache_req; /* deferred request handling */ |
| 180 | struct file_lock * b_fl; /* set for GETLK */ |
| 181 | struct cache_deferred_req * b_deferred_req; |
| 182 | unsigned int b_flags; /* block flags */ |
| 183 | #define B_QUEUED 1 /* lock queued */ |
| 184 | #define B_GOT_CALLBACK 2 /* got lock or conflicting lock */ |
| 185 | #define B_TIMED_OUT 4 /* filesystem too slow to respond */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | }; |
| 187 | |
| 188 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 189 | * Global variables |
| 190 | */ |
Trond Myklebust | a613fa1 | 2012-01-20 13:53:56 -0500 | [diff] [blame] | 191 | extern const struct rpc_program nlm_program; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 192 | extern struct svc_procedure nlmsvc_procedures[]; |
| 193 | #ifdef CONFIG_LOCKD_V4 |
| 194 | extern struct svc_procedure nlmsvc_procedures4[]; |
| 195 | #endif |
| 196 | extern int nlmsvc_grace_period; |
| 197 | extern unsigned long nlmsvc_timeout; |
Rusty Russell | 90ab5ee | 2012-01-13 09:32:20 +1030 | [diff] [blame] | 198 | extern bool nsm_use_hostnames; |
Chuck Lever | 6c9dc425 | 2009-06-17 18:02:10 -0700 | [diff] [blame] | 199 | extern u32 nsm_local_state; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | |
| 201 | /* |
| 202 | * Lockd client functions |
| 203 | */ |
Trond Myklebust | 9273723 | 2006-03-20 13:44:45 -0500 | [diff] [blame] | 204 | struct nlm_rqst * nlm_alloc_call(struct nlm_host *host); |
Trond Myklebust | 9273723 | 2006-03-20 13:44:45 -0500 | [diff] [blame] | 205 | int nlm_async_call(struct nlm_rqst *, u32, const struct rpc_call_ops *); |
Trond Myklebust | d471662 | 2006-03-20 13:44:45 -0500 | [diff] [blame] | 206 | int nlm_async_reply(struct nlm_rqst *, u32, const struct rpc_call_ops *); |
Chuck Lever | 7db836d | 2010-12-14 15:05:42 +0000 | [diff] [blame] | 207 | void nlmclnt_release_call(struct nlm_rqst *); |
Trond Myklebust | 3a649b8 | 2006-03-20 13:44:44 -0500 | [diff] [blame] | 208 | struct nlm_wait * nlmclnt_prepare_block(struct nlm_host *host, struct file_lock *fl); |
| 209 | void nlmclnt_finish_block(struct nlm_wait *block); |
| 210 | int nlmclnt_block(struct nlm_wait *block, struct nlm_rqst *req, long timeout); |
Chuck Lever | dcff09f | 2008-10-03 12:50:36 -0400 | [diff] [blame] | 211 | __be32 nlmclnt_grant(const struct sockaddr *addr, |
| 212 | const struct nlm_lock *lock); |
Olaf Kirch | 5c8dd29 | 2006-10-04 02:15:55 -0700 | [diff] [blame] | 213 | void nlmclnt_recovery(struct nlm_host *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 214 | int nlmclnt_reclaim(struct nlm_host *, struct file_lock *); |
Olaf Kirch | 031d869 | 2006-10-04 02:16:02 -0700 | [diff] [blame] | 215 | void nlmclnt_next_cookie(struct nlm_cookie *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 216 | |
| 217 | /* |
| 218 | * Host cache |
| 219 | */ |
Chuck Lever | d7d2044 | 2008-10-03 12:50:21 -0400 | [diff] [blame] | 220 | struct nlm_host *nlmclnt_lookup_host(const struct sockaddr *sap, |
| 221 | const size_t salen, |
| 222 | const unsigned short protocol, |
| 223 | const u32 version, |
Chuck Lever | 0cb2659 | 2008-12-23 15:21:38 -0500 | [diff] [blame] | 224 | const char *hostname, |
| 225 | int noresvport); |
Chuck Lever | 8ea6ecc | 2010-12-14 15:05:52 +0000 | [diff] [blame] | 226 | void nlmclnt_release_host(struct nlm_host *); |
Chuck Lever | 6bfbe8a | 2008-10-03 12:50:29 -0400 | [diff] [blame] | 227 | struct nlm_host *nlmsvc_lookup_host(const struct svc_rqst *rqstp, |
| 228 | const char *hostname, |
| 229 | const size_t hostname_len); |
Chuck Lever | 67216b9 | 2010-12-14 15:06:12 +0000 | [diff] [blame] | 230 | void nlmsvc_release_host(struct nlm_host *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 231 | struct rpc_clnt * nlm_bind_host(struct nlm_host *); |
| 232 | void nlm_rebind_host(struct nlm_host *); |
| 233 | struct nlm_host * nlm_get_host(struct nlm_host *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | void nlm_shutdown_hosts(void); |
Chuck Lever | 7fefc9c | 2008-12-05 19:03:31 -0500 | [diff] [blame] | 235 | void nlm_host_rebooted(const struct nlm_reboot *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | |
Chuck Lever | 1e49323c | 2008-12-04 14:21:24 -0500 | [diff] [blame] | 237 | /* |
| 238 | * Host monitoring |
| 239 | */ |
| 240 | int nsm_monitor(const struct nlm_host *host); |
Chuck Lever | 356c3eb | 2008-12-04 14:21:38 -0500 | [diff] [blame] | 241 | void nsm_unmonitor(const struct nlm_host *host); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 242 | |
Chuck Lever | 92fd91b | 2008-12-05 19:04:01 -0500 | [diff] [blame] | 243 | struct nsm_handle *nsm_get_handle(const struct sockaddr *sap, |
| 244 | const size_t salen, |
Chuck Lever | 67c6d10 | 2008-12-05 19:02:45 -0500 | [diff] [blame] | 245 | const char *hostname, |
Chuck Lever | 92fd91b | 2008-12-05 19:04:01 -0500 | [diff] [blame] | 246 | const size_t hostname_len); |
Chuck Lever | 3420a8c | 2008-12-05 19:03:46 -0500 | [diff] [blame] | 247 | struct nsm_handle *nsm_reboot_lookup(const struct nlm_reboot *info); |
Chuck Lever | 67c6d10 | 2008-12-05 19:02:45 -0500 | [diff] [blame] | 248 | void nsm_release(struct nsm_handle *nsm); |
| 249 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 250 | /* |
Olaf Kirch | f2af793 | 2006-10-04 02:15:59 -0700 | [diff] [blame] | 251 | * This is used in garbage collection and resource reclaim |
| 252 | * A return value != 0 means destroy the lock/block/share |
| 253 | */ |
Wendy Cheng | 4373ea8 | 2008-01-17 11:10:12 -0500 | [diff] [blame] | 254 | typedef int (*nlm_host_match_fn_t)(void *cur, struct nlm_host *ref); |
Olaf Kirch | f2af793 | 2006-10-04 02:15:59 -0700 | [diff] [blame] | 255 | |
| 256 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | * Server-side lock handling |
| 258 | */ |
Al Viro | 52921e0 | 2006-10-19 23:28:46 -0700 | [diff] [blame] | 259 | __be32 nlmsvc_lock(struct svc_rqst *, struct nlm_file *, |
Jeff Layton | 6cde4de | 2008-07-15 14:26:17 -0400 | [diff] [blame] | 260 | struct nlm_host *, struct nlm_lock *, int, |
J. Bruce Fields | b2b5028 | 2008-02-06 13:59:23 -0500 | [diff] [blame] | 261 | struct nlm_cookie *, int); |
Al Viro | 52921e0 | 2006-10-19 23:28:46 -0700 | [diff] [blame] | 262 | __be32 nlmsvc_unlock(struct nlm_file *, struct nlm_lock *); |
Marc Eshel | 85f3f1b3 | 2006-11-28 16:27:06 -0500 | [diff] [blame] | 263 | __be32 nlmsvc_testlock(struct svc_rqst *, struct nlm_file *, |
Jeff Layton | 8f920d5 | 2008-07-15 14:06:48 -0400 | [diff] [blame] | 264 | struct nlm_host *, struct nlm_lock *, |
| 265 | struct nlm_lock *, struct nlm_cookie *); |
Al Viro | 52921e0 | 2006-10-19 23:28:46 -0700 | [diff] [blame] | 266 | __be32 nlmsvc_cancel_blocked(struct nlm_file *, struct nlm_lock *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | unsigned long nlmsvc_retry_blocked(void); |
J. Bruce Fields | f3ee439f | 2006-03-20 23:24:13 -0500 | [diff] [blame] | 268 | void nlmsvc_traverse_blocks(struct nlm_host *, struct nlm_file *, |
Olaf Kirch | f2af793 | 2006-10-04 02:15:59 -0700 | [diff] [blame] | 269 | nlm_host_match_fn_t match); |
Al Viro | e8c5c04 | 2006-12-13 00:35:03 -0800 | [diff] [blame] | 270 | void nlmsvc_grant_reply(struct nlm_cookie *, __be32); |
Chuck Lever | 7db836d | 2010-12-14 15:05:42 +0000 | [diff] [blame] | 271 | void nlmsvc_release_call(struct nlm_rqst *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 272 | |
| 273 | /* |
| 274 | * File handling for the server personality |
| 275 | */ |
Al Viro | 52921e0 | 2006-10-19 23:28:46 -0700 | [diff] [blame] | 276 | __be32 nlm_lookup_file(struct svc_rqst *, struct nlm_file **, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | struct nfs_fh *); |
| 278 | void nlm_release_file(struct nlm_file *); |
| 279 | void nlmsvc_mark_resources(void); |
| 280 | void nlmsvc_free_host_resources(struct nlm_host *); |
| 281 | void nlmsvc_invalidate_all(void); |
| 282 | |
Wendy Cheng | 4373ea8 | 2008-01-17 11:10:12 -0500 | [diff] [blame] | 283 | /* |
| 284 | * Cluster failover support |
| 285 | */ |
Wendy Cheng | 17efa37 | 2008-01-17 11:10:12 -0500 | [diff] [blame] | 286 | int nlmsvc_unlock_all_by_sb(struct super_block *sb); |
Chuck Lever | 367c8c7 | 2008-06-30 18:58:14 -0400 | [diff] [blame] | 287 | int nlmsvc_unlock_all_by_ip(struct sockaddr *server_addr); |
Wendy Cheng | 4373ea8 | 2008-01-17 11:10:12 -0500 | [diff] [blame] | 288 | |
Chuck Lever | f34ec99 | 2008-03-14 14:18:45 -0400 | [diff] [blame] | 289 | static inline struct inode *nlmsvc_file_inode(struct nlm_file *file) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 290 | { |
Josef Sipek | 225a719 | 2006-12-08 02:37:18 -0800 | [diff] [blame] | 291 | return file->f_file->f_path.dentry->d_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | } |
| 293 | |
Chuck Lever | b85e467 | 2008-10-03 12:50:44 -0400 | [diff] [blame] | 294 | static inline int __nlm_privileged_request4(const struct sockaddr *sap) |
| 295 | { |
| 296 | const struct sockaddr_in *sin = (struct sockaddr_in *)sap; |
Chuck Lever | 57ef692 | 2008-12-11 17:56:52 -0500 | [diff] [blame] | 297 | |
| 298 | if (ntohs(sin->sin_port) > 1023) |
| 299 | return 0; |
| 300 | |
| 301 | return ipv4_is_loopback(sin->sin_addr.s_addr); |
Chuck Lever | b85e467 | 2008-10-03 12:50:44 -0400 | [diff] [blame] | 302 | } |
| 303 | |
Eric Dumazet | dfd56b8 | 2011-12-10 09:48:31 +0000 | [diff] [blame] | 304 | #if IS_ENABLED(CONFIG_IPV6) |
Chuck Lever | b85e467 | 2008-10-03 12:50:44 -0400 | [diff] [blame] | 305 | static inline int __nlm_privileged_request6(const struct sockaddr *sap) |
| 306 | { |
| 307 | const struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sap; |
Chuck Lever | d1208f7 | 2008-12-11 17:56:44 -0500 | [diff] [blame] | 308 | |
| 309 | if (ntohs(sin6->sin6_port) > 1023) |
| 310 | return 0; |
| 311 | |
| 312 | if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_MAPPED) |
| 313 | return ipv4_is_loopback(sin6->sin6_addr.s6_addr32[3]); |
| 314 | |
| 315 | return ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LOOPBACK; |
Chuck Lever | b85e467 | 2008-10-03 12:50:44 -0400 | [diff] [blame] | 316 | } |
Eric Dumazet | dfd56b8 | 2011-12-10 09:48:31 +0000 | [diff] [blame] | 317 | #else /* IS_ENABLED(CONFIG_IPV6) */ |
Chuck Lever | b85e467 | 2008-10-03 12:50:44 -0400 | [diff] [blame] | 318 | static inline int __nlm_privileged_request6(const struct sockaddr *sap) |
| 319 | { |
| 320 | return 0; |
| 321 | } |
Eric Dumazet | dfd56b8 | 2011-12-10 09:48:31 +0000 | [diff] [blame] | 322 | #endif /* IS_ENABLED(CONFIG_IPV6) */ |
Chuck Lever | b85e467 | 2008-10-03 12:50:44 -0400 | [diff] [blame] | 323 | |
| 324 | /* |
| 325 | * Ensure incoming requests are from local privileged callers. |
| 326 | * |
| 327 | * Return TRUE if sender is local and is connecting via a privileged port; |
| 328 | * otherwise return FALSE. |
| 329 | */ |
| 330 | static inline int nlm_privileged_requester(const struct svc_rqst *rqstp) |
| 331 | { |
| 332 | const struct sockaddr *sap = svc_addr(rqstp); |
| 333 | |
| 334 | switch (sap->sa_family) { |
| 335 | case AF_INET: |
| 336 | return __nlm_privileged_request4(sap); |
| 337 | case AF_INET6: |
| 338 | return __nlm_privileged_request6(sap); |
| 339 | default: |
| 340 | return 0; |
| 341 | } |
| 342 | } |
| 343 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 344 | /* |
| 345 | * Compare two NLM locks. |
| 346 | * When the second lock is of type F_UNLCK, this acts like a wildcard. |
| 347 | */ |
Chuck Lever | f34ec99 | 2008-03-14 14:18:45 -0400 | [diff] [blame] | 348 | static inline int nlm_compare_locks(const struct file_lock *fl1, |
| 349 | const struct file_lock *fl2) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 350 | { |
| 351 | return fl1->fl_pid == fl2->fl_pid |
Marc Eshel | 3134cbe | 2006-06-09 09:40:20 -0400 | [diff] [blame] | 352 | && fl1->fl_owner == fl2->fl_owner |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 353 | && fl1->fl_start == fl2->fl_start |
| 354 | && fl1->fl_end == fl2->fl_end |
| 355 | &&(fl1->fl_type == fl2->fl_type || fl2->fl_type == F_UNLCK); |
| 356 | } |
| 357 | |
Alexey Dobriyan | 7b02196 | 2009-09-21 17:01:12 -0700 | [diff] [blame] | 358 | extern const struct lock_manager_operations nlmsvc_lock_operations; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 359 | |
| 360 | #endif /* __KERNEL__ */ |
| 361 | |
| 362 | #endif /* LINUX_LOCKD_LOCKD_H */ |