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, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22 /*
23 * Copyright 2005 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
28 /* All Rights Reserved */
29
30 /*
31 * University Copyright- Copyright (c) 1982, 1986, 1988
32 * The Regents of the University of California
33 * All Rights Reserved
34 *
35 * University Acknowledgment- Portions of this document are derived from
36 * software developed by the University of California, Berkeley, and its
37 * contributors.
38 */
39
40 /*
41 * Copyright 2011 Nexenta Systems, Inc. All rights reserved.
42 * Copyright (c) 2012 by Delphix. All rights reserved.
43 */
44
45 #ifndef _SM_STATD_H
46 #define _SM_STATD_H
47
48 #ifdef __cplusplus
49 extern "C" {
50 #endif
51
52 /* Limit defines */
53 #define SM_DIRECTORY_MODE 00755
54 #define MAX_HASHSIZE 50
55 #define SM_RPC_TIMEOUT 15
56 #define PERCENT_MINJOIN 10
57 #define MAX_FDS 256
58 #define MAX_THR 25
59 #define INC_DELAYTIME 30
60 #define MAX_DELAYTIME 300
61 #define SM_CLTS_TIMEOUT 15
62 /* max strlen of /statmon/state, /statmon/sm.bak, /statmon/sm */
63 #define SM_MAXPATHLEN 17
64 /* Increment size for realloc of array host_name */
65 #define HOST_NAME_INCR 5
66
67 /* supported address family names in /var/statmon symlinks */
68 #define SM_ADDR_IPV4 "ipv4"
69 #define SM_ADDR_IPV6 "ipv6"
70
71 /* Supported for readdir_r() */
72 #define MAXDIRENT (sizeof (struct dirent) + _POSIX_PATH_MAX + 1)
73
74 /* Structure entry for monitor table (mon_table) */
75 struct mon_entry {
76 mon id; /* mon information: mon_name, my_id */
77 struct mon_entry *prev; /* Prev ptr to prev entry in hash */
78 struct mon_entry *nxt; /* Next ptr to next entry in hash */
79 };
80 typedef struct mon_entry mon_entry;
81
82 /* Structure entry for record (rec_table) and recovery (recov_q) tables */
83 struct name_entry {
84 char *name; /* name of host */
85 int count; /* count of entries */
86 struct name_entry *prev; /* Prev ptr to prev entry in hash */
87 struct name_entry *nxt; /* Next ptr to next entry in hash */
88 };
89 typedef struct name_entry name_entry;
90
91 /* Structure for passing arguments into thread send_notice */
92 typedef struct moninfo {
93 mon id; /* Monitor information */
94 int state; /* Current state */
95 } moninfo_t;
96
97 /* Structure entry for hash tables */
98 typedef struct sm_hash {
99 union {
100 struct mon_entry *mon_hdptr; /* Head ptr for mon_table */
101 name_entry *rec_hdptr; /* Head ptr for rec_table */
102 name_entry *recov_hdptr; /* Head ptr for recov_q */
103 } smhd_t;
104 mutex_t lock; /* Lock to protect each list head */
105 } sm_hash_t;
106
107 #define sm_monhdp smhd_t.mon_hdptr
108 #define sm_rechdp smhd_t.rec_hdptr
109 #define sm_recovhdp smhd_t.recov_hdptr
110
111 /* Structure entry for address list in name-to-address entry */
112 typedef struct addr_entry {
113 struct addr_entry *next;
114 struct netobj ah;
115 sa_family_t family;
116 } addr_entry_t;
117
118 /* Structure entry for name-to-address translation table */
119 typedef struct name_addr_entry {
120 struct name_addr_entry *next;
121 char *name;
122 struct addr_entry *addresses;
123 } name_addr_entry_t;
124
125 /* Hash tables for each of the in-cache information */
126 extern sm_hash_t mon_table[MAX_HASHSIZE];
127
128 /* Global variables */
129 extern mutex_t crash_lock; /* lock for die and crash variables */
130 extern int die; /* Flag to indicate that an SM_CRASH */
131 /* request came in & to stop threads cleanly */
132 extern int in_crash; /* Flag to single thread sm_crash requests. */
133 extern int regfiles_only; /* Flag to indicate symlink use in statmon */
134 extern cond_t crash_finish; /* Condition to wait until crash is finished */
135 extern mutex_t sm_trylock; /* Lock to single thread sm_try */
136 /*
137 * The only established lock precedence here is:
138 *
139 * thr_rwlock > name_addrlock
140 */
141 extern mutex_t name_addrlock; /* Locks all entries of name-to-addr table */
142 extern rwlock_t thr_rwlock; /* Reader/writer lock for requests coming in */
143 extern cond_t retrywait; /* Condition to wait before starting retry */
144
145 extern char STATE[MAXPATHLEN], CURRENT[MAXPATHLEN];
146 extern char BACKUP[MAXPATHLEN];
147 extern int LOCAL_STATE;
148
149 /*
150 * Hash functions for monitor and record hash tables.
151 * Functions are hashed based on first 2 letters and last 2 letters of name.
152 * If only 1 letter in name, then, hash only on 1 letter.
153 */
154 #define SMHASH(name, key) { \
155 int l; \
156 key = *name; \
157 if ((l = strlen(name)) != 1) \
158 key |= ((*(name+(l-1)) << 24) | (*(name+1) << 16) | \
159 (*(name+(l-2)) << 8)); \
160 key = key % MAX_HASHSIZE; \
161 }
162
163 extern int debug; /* Prints out debug information if set. */
164
165 extern char hostname[MAXHOSTNAMELEN];
166
167 /*
168 * These variables will be used to store all the
169 * alias names for the host, as well as the -a
170 * command line hostnames.
171 */
172 extern char **host_name; /* store -a opts */
173 extern int host_name_count;
174 extern int addrix; /* # of -a entries */
175
176 /*
177 * The following 2 variables are meaningful
178 * only under a HA configuration.
179 */
180 extern char **path_name; /* store -p opts */
181 extern int pathix; /* # of -p entries */
182
183 /* Function prototypes used in program */
184 extern int create_file(char *name);
185 extern void delete_file(char *name);
186 extern void record_name(char *name, int op);
187 extern void sm_crash(void);
188 extern void statd_init();
189 extern void merge_hosts(void);
190 extern void merge_ips(void);
191 extern CLIENT *create_client(char *, int, int, char *, struct timeval *);
192 extern char *xmalloc(unsigned);
193
194 /*
195 * RPC service functions, slightly different here than the
196 * generated ones in sm_inter.h
197 */
198 extern void nsmaddrproc1_reg(reg1args *, reg1res *);
199 extern void sm_stat_svc(sm_name *namep, sm_stat_res *resp);
200 extern void sm_mon_svc(mon *monp, sm_stat_res *resp);
201 extern void sm_unmon_svc(mon_id *monidp, sm_stat *resp);
202 extern void sm_unmon_all_svc(my_id *myidp, sm_stat *resp);
203 extern void sm_simu_crash_svc(void *myidp);
204 extern void sm_notify_svc(stat_chge *ntfp);
205
206 extern void sm_inithash();
207 extern void copydir_from_to(char *from_dir, char *to_dir);
208 extern int str_cmp_unqual_hostname(char *, char *);
209 extern void record_addr(char *name, sa_family_t family, struct netobj *ah);
210 extern int is_symlink(char *file);
211 extern int create_symlink(char *todir, char *rname, char *lname);
212 extern int str_cmp_address_specifier(char *specifier1, char *specifier2);
213
214 #ifdef __cplusplus
215 }
216 #endif
217
218 #endif /* _SM_STATD_H */