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 */ 219