1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright 2015 Nexenta Systems, Inc. All rights reserved.
24 */
25
26 /*
27 * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
28 * Use is subject to license terms.
29 */
30
31 #ifndef _AUTOMOUNT_H
32 #define _AUTOMOUNT_H
33
34 #include <fslib.h> /* needed for mntlist_t declaration */
35 #include <thread.h>
36 #include <sys/mntent.h> /* " " MNTTYPE_* declarations */
37 #include <synch.h> /* needed for mutex_t declaration */
38 #include <sys/types.h>
39 #include <rpc/rpc.h>
40 #include <sys/fs/autofs.h>
41 #include <netinet/in.h> /* needed for sockaddr_in declaration */
42 #include <door.h>
43
44 #ifdef MALLOC_DEBUG
45 #include <debug_alloc.h>
46 #endif
47
48 #ifdef __cplusplus
49 extern "C" {
50 #endif
51
52 #ifndef _REENTRANT
53 #define fork1 vfork
54 #define rpc_control(a, b) 1
55 #endif
56
57 #define DOMOUNT_USER 1
58 #define DOMOUNT_KERNEL 2
59
60 /*
61 * Solaris autofs configuration file location
62 */
63 #define AUTOFSADMIN "/etc/default/autofs"
64
65 #define MXHOSTNAMELEN 64
66 #define MAXNETNAMELEN 255
67 #define MAXFILENAMELEN 255
68 #define LINESZ 4096
69 #define MAXADDRLEN 128 /* max autofs address length */
70 #define MAXOPTSLEN 1024
71
72 #define AUTOFS_MOUNT_TIMEOUT 600 /* default min time mount will */
73 /* remain mounted (in seconds) */
74 #define AUTOFS_RPC_TIMEOUT 60 /* secs autofs will wait for */
75 /* automountd's reply before */
76 /* retransmitting */
77 /* stack ops */
78 #define ERASE 0
79 #define PUSH 1
80 #define POP 2
81 #define INIT 3
82 #define STACKSIZ 30
83
84 #define DIST_SELF 1
85 #define DIST_MYSUB 2
86 #define DIST_MYNET 3
87 #define DIST_OTHER 4
88
89 #define MAXIFS 32
90
91 /*
92 * Retry operation related definitions.
93 */
94 #define RET_OK 0
95 #define RET_RETRY 32
96 #define RET_ERR 33
97 #define INITDELAY 5
98 #define DELAY_BACKOFF 2
99 #define MAXDELAY 120
100 #define ARGV_MAX 16
101 #define VFS_PATH "/usr/lib/fs"
102 #define DELAY(delay) { \
103 (void) sleep(delay); \
104 delay *= DELAY_BACKOFF; \
105 if (delay > MAXDELAY) \
106 delay = MAXDELAY; \
107 }
108
109 struct mapline {
110 char linebuf[LINESZ];
111 char lineqbuf[LINESZ];
112 };
113
114 /*
115 * Structure describing a host/filesystem/dir tuple in a NIS map entry
116 */
117 struct mapfs {
118 struct mapfs *mfs_next; /* next in entry */
119 int mfs_ignore; /* ignore this entry */
120 char *mfs_host; /* host name */
121 char *mfs_dir; /* dir to mount */
122 int mfs_penalty; /* mount penalty for this host */
123 int mfs_distance; /* distance hint */
124 struct nfs_args *mfs_args; /* nfs_args */
125 struct netconfig *mfs_nconf;
126 rpcvers_t mfs_version; /* NFS version */
127
128 #define MFS_ALLOC_DIR 0x1 /* mfs_dir now points to different */
129 /* buffer */
130
131 #define MFS_URL 0x2 /* is NFS url listed in this tuple. */
132 #define MFS_FH_VIA_WEBNFS 0x4 /* got file handle during ping phase */
133
134 uint_t mfs_flags;
135 uint_t mfs_port; /* port# in NFS url */
136 };
137
138 /*
139 * NIS entry - lookup of name in DIR gets us this
140 */
141 struct mapent {
142 char *map_fstype; /* file system type e.g. "nfs" */
143 char *map_mounter; /* base fs */
144 char *map_root; /* path to mount root */
145 char *map_mntpnt; /* path from mount root */
146 char *map_mntopts; /* mount options */
147 char *map_fsw; /* mount fs information */
148 char *map_fswq; /* quoted mountfs information */
149 int map_mntlevel; /* mapentry hierarchy level */
150 bool_t map_modified; /* flags modified mapentries */
151 bool_t map_faked; /* flags faked mapentries */
152 int map_err; /* flags any bad entries in the map */
153 struct mapfs *map_fs; /* list of replicas for nfs */
154 struct mapent *map_next;
155 };
156
157
158 /*
159 * Descriptor for each directory served by the automounter
160 */
161 struct autodir {
162 char *dir_name; /* mount point */
163 char *dir_map; /* name of map for dir */
164 char *dir_opts; /* default mount options */
165 int dir_direct; /* direct mountpoint ? */
166 int dir_remount; /* a remount */
167 struct autodir *dir_next; /* next entry */
168 struct autodir *dir_prev; /* prev entry */
169 };
170
171 /*
172 * This structure is used to build an array of
173 * hostnames with associated penalties to be
174 * passed to the nfs_cast procedure
175 */
176 struct host_names {
177 char *host;
178 int penalty;
179 };
180
181 /*
182 * structure used to build list of contents for a map on
183 * a readdir request
184 */
185 struct dir_entry {
186 char *name; /* name of entry */
187 ino_t nodeid;
188 off_t offset;
189 struct dir_entry *next;
190 struct dir_entry *left; /* left element in binary tree */
191 struct dir_entry *right; /* right element in binary tree */
192 };
193
194 /*
195 * offset index table
196 */
197 struct off_tbl {
198 off_t offset;
199 struct dir_entry *first;
200 struct off_tbl *next;
201 };
202
203 #ifndef NO_RDDIR_CACHE
204 /*
205 * directory cache for 'map'
206 */
207 struct autofs_rddir_cache {
208 char *map;
209 struct off_tbl *offtp;
210 ulong_t bucket_size;
211 time_t ttl;
212 struct dir_entry *entp;
213 mutex_t lock; /* protects 'in_use' field */
214 int in_use; /* # threads referencing it */
215 rwlock_t rwlock; /* protects 'full' and 'next' */
216 int full; /* full == 1 when cache full */
217 struct autofs_rddir_cache *next;
218 };
219
220 #define RDDIR_CACHE_TIME 300 /* in seconds */
221
222 #endif /* NO_RDDIR_CACHE */
223
224 /*
225 * structure used to maintain address list for localhost
226 */
227
228 struct myaddrs {
229 struct sockaddr_in sin;
230 struct myaddrs *myaddrs_next;
231 };
232
233 /*
234 * structure used to pass commands to the door servers
235 */
236
237 typedef struct command {
238 char file[MAXPATHLEN];
239 char argv[ARGV_MAX][MAXOPTSLEN];
240 char key[MAXOPTSLEN];
241 int console;
242 } command_t;
243
244 /*
245 * globally visible door_server file descriptor
246 */
247 int did_exec_map;
248 int did_fork_exec;
249
250 extern time_t timenow; /* set at start of processing of each RPC call */
251 extern char self[];
252 extern int verbose;
253 extern int trace;
254 extern int automountd_nobrowse;
255 extern struct autodir *dir_head;
256 extern struct autodir *dir_tail;
257 extern struct mntlist *current_mounts;
258 struct mounta; /* defined in sys/vfs.h */
259 extern struct myaddrs *myaddrs_head;
260
261 extern rwlock_t cache_lock;
262 extern rwlock_t portmap_cache_lock;
263 extern rwlock_t autofs_rddir_cache_lock;
264
265 extern mutex_t cleanup_lock;
266 extern cond_t cleanup_start_cv;
267 extern cond_t cleanup_done_cv;
268
269 /*
270 * mnttab handling routines
271 */
272 extern void free_mapent(struct mapent *);
273 extern struct mntlist *getmntlist(void);
274 extern dev_t get_devid(struct extmnttab *);
275
276 /*
277 * utilities
278 */
279 extern struct mapent *parse_entry(char *, char *, char *, struct mapline *,
280 char *, uint_t, bool_t);
281 extern int macro_expand(char *, char *, char *, int);
282 extern void unquote(char *, char *);
283 extern void unbracket(char **);
284 extern void trim(char *);
285 extern char *get_line(FILE *, char *, char *, int);
286 extern int getword(char *, char *, char **, char **, char, int);
287 extern int get_retry(char *);
288 extern int str_opt(struct mnttab *, char *, char **);
289 extern void put_automountd_env(void);
290 extern void dirinit(char *, char *, char *, int, char **, char ***);
291 extern void pr_msg(const char *, ...);
292 extern void trace_prt(int, char *, ...);
293 extern void free_autofs_args(autofs_args *);
294 extern void free_nfs_args(struct nfs_args *);
295 extern void free_mounta(struct mounta *);
296
297 extern int nopt(struct mnttab *, char *, int *);
298 extern int set_versrange(rpcvers_t, rpcvers_t *, rpcvers_t *);
299 extern enum clnt_stat pingnfs(char *, int, rpcvers_t *, rpcvers_t,
300 ushort_t, bool_t, char *, char *);
301
302 extern void *autofs_get_buffer(size_t);
303 extern int self_check(char *);
304 extern int do_mount1(char *, char *, char *, char *, char *, uint_t, uid_t,
305 action_list **, int);
306 extern int do_lookup1(char *, char *, char *, char *, char *, uint_t, uid_t,
307 autofs_action_t *, struct linka *);
308 extern int do_unmount1(umntrequest *);
309 extern int do_readdir(autofs_rddirargs *, autofs_rddirres *);
310 extern int nfsunmount(struct mnttab *);
311 extern int loopbackmount(char *, char *, char *, int);
312 extern int mount_nfs(struct mapent *, char *, char *, int, uid_t,
313 action_list **);
314 extern int mount_autofs(struct mapent *, char *, action_list *,
315 char *rootp, char *subdir, char *key);
316 extern int mount_generic(char *, char *, char *, char *, int);
317 extern enum clnt_stat nfs_cast(struct mapfs *, struct mapfs **, int);
318
319 extern bool_t hasrestrictopt(char *);
320
321 #ifndef NO_RDDIR_CACHE
322 /*
323 * readdir handling routines
324 */
325 extern char *auto_rddir_malloc(unsigned);
326 extern char *auto_rddir_strdup(const char *);
327 extern struct dir_entry *btree_lookup(struct dir_entry *, char *);
328 extern void btree_enter(struct dir_entry **, struct dir_entry *);
329 extern int add_dir_entry(char *, struct dir_entry **, struct dir_entry **);
330 extern void cache_cleanup(void);
331 extern int autofs_rddir_cache_lookup(char *, struct autofs_rddir_cache **);
332 extern struct dir_entry *rddir_entry_lookup(char *, struct dir_entry *);
333 #endif /* NO_RDDIR_CACHE */
334
335 /*
336 * generic interface to specific name service functions
337 */
338 extern void ns_setup(char **, char ***);
339 extern int getmapent(char *, char *, struct mapline *, char **, char ***,
340 bool_t *, bool_t);
341 extern int getmapkeys(char *, struct dir_entry **, int *, int *, char **,
342 char ***, uid_t);
343 extern int loadmaster_map(char *, char *, char **, char ***);
344 extern int loaddirect_map(char *, char *, char *, char **, char ***);
345
346 /*
347 * these name service specific functions should not be
348 * accessed directly, use the generic functions.
349 */
350 extern void init_files(char **, char ***);
351 extern int getmapent_files(char *, char *, struct mapline *, char **, char ***,
352 bool_t *, bool_t);
353 extern int loadmaster_files(char *, char *, char **, char ***);
354 extern int loaddirect_files(char *, char *, char *, char **, char ***);
355 extern int getmapkeys_files(char *, struct dir_entry **, int *, int *,
356 char **, char ***);
357 extern int stack_op(int, char *, char **, char ***);
358
359 extern void init_nis(char **, char ***);
360 extern int getmapent_nis(char *, char *, struct mapline *, char **, char ***,
361 bool_t *, bool_t);
362 extern int loadmaster_nis(char *, char *, char **, char ***);
363 extern int loaddirect_nis(char *, char *, char *, char **, char ***);
364 extern int getmapkeys_nis(char *, struct dir_entry **, int *, int *,
365 char **, char ***);
366
367 extern void init_ldap(char **, char ***);
368 extern int getmapent_ldap(char *, char *, struct mapline *, char **, char ***,
369 bool_t *, bool_t);
370 extern int loadmaster_ldap(char *, char *, char **, char ***);
371 extern int loaddirect_ldap(char *, char *, char *, char **, char ***);
372 extern int getmapkeys_ldap(char *, struct dir_entry **, int *, int *,
373 char **, char ***);
374
375
376 /*
377 * end of name service specific functions
378 */
379
380 /*
381 * not defined in any header file
382 */
383 extern int __clnt_bindresvport(CLIENT *);
384 extern int getnetmaskbynet(const struct in_addr, struct in_addr *);
385
386 /*
387 * Hidden rpc functions
388 */
389 extern int __nis_reset_state();
390 extern int __rpc_negotiate_uid(int);
391
392 /*
393 * door_server functions to handle fork activity within the automounter
394 */
395 void automountd_do_fork_exec(void *, char *, size_t, door_desc_t *, uint_t);
396 void automountd_do_exec_map(void *, char *, size_t, door_desc_t *, uint_t);
397
398 #ifdef __cplusplus
399 }
400 #endif
401
402 #endif /* _AUTOMOUNT_H */