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 #ifndef _SM_STATD_H
  41 #define _SM_STATD_H
  42 
  43 #pragma ident   "%Z%%M% %I%     %E% SMI"
  44 
  45 #ifdef __cplusplus
  46 extern "C" {
  47 #endif
  48 
  49 /* Limit defines */
  50 #define SM_DIRECTORY_MODE 00755
  51 #define MAX_HASHSIZE 50
  52 #define SM_RPC_TIMEOUT  15
  53 #define PERCENT_MINJOIN 10
  54 #define MAX_FDS 256
  55 #define MAX_THR 25
  56 #define INC_DELAYTIME   30
  57 #define MAX_DELAYTIME   300
  58 #define SM_CLTS_TIMEOUT 15
  59 /* max strlen of /statmon/state, /statmon/sm.bak, /statmon/sm */
  60 #define SM_MAXPATHLEN   17
  61 /* Increment size for realloc of array host_name */
  62 #define HOST_NAME_INCR  5
  63 
  64 /* supported address family names in /var/statmon symlinks */
  65 #define SM_ADDR_IPV4    "ipv4"
  66 #define SM_ADDR_IPV6    "ipv6"
  67 
  68 /* Supported for readdir_r() */
  69 #define MAXDIRENT       (sizeof (struct dirent) +  _POSIX_PATH_MAX + 1)
  70 
  71 /* Structure entry for monitor table (mon_table) */
  72 struct mon_entry {
  73         mon id;                         /* mon information: mon_name, my_id */
  74         struct mon_entry *prev;         /* Prev ptr to prev entry in hash */
  75         struct mon_entry *nxt;          /* Next ptr to next entry in hash */
  76 };
  77 typedef struct mon_entry mon_entry;
  78 
  79 /* Structure entry for record (rec_table) and recovery (recov_q) tables */
  80 struct name_entry {
  81         char *name;                     /* name of host */
  82         int count;                      /* count of entries */
  83         struct name_entry *prev;        /* Prev ptr to prev entry in hash */
  84         struct name_entry *nxt;         /* Next ptr to next entry in hash */
  85 };
  86 typedef struct name_entry name_entry;
  87 
  88 /* Structure for passing arguments into thread send_notice */
  89 typedef struct moninfo {
  90         mon id;                         /* Monitor information */
  91         int state;                      /* Current state */
  92 } moninfo_t;
  93 
  94 /* Structure entry for hash tables */
  95 typedef struct sm_hash {
  96         union {
  97                 struct mon_entry *mon_hdptr;    /* Head ptr for mon_table */
  98                 name_entry *rec_hdptr;          /* Head ptr for rec_table */
  99                 name_entry *recov_hdptr;        /* Head ptr for recov_q */
 100         } smhd_t;
 101         mutex_t lock;                   /* Lock to protect each list head */
 102 } sm_hash_t;
 103 
 104 #define sm_monhdp       smhd_t.mon_hdptr
 105 #define sm_rechdp       smhd_t.rec_hdptr
 106 #define sm_recovhdp     smhd_t.recov_hdptr
 107 
 108 /* Structure entry for address list in name-to-address entry */
 109 typedef struct addr_entry {
 110         struct addr_entry *next;
 111         struct netobj ah;
 112         sa_family_t family;
 113 } addr_entry_t;
 114 
 115 /* Structure entry for name-to-address translation table */
 116 typedef struct name_addr_entry {
 117         struct name_addr_entry *next;
 118         char *name;
 119         struct addr_entry *addresses;
 120 } name_addr_entry_t;
 121 
 122 /* Hash tables for each of the in-cache information */
 123 extern sm_hash_t        mon_table[MAX_HASHSIZE];
 124 
 125 /* Global variables */
 126 extern mutex_t crash_lock;      /* lock for die and crash variables */
 127 extern int die;                 /* Flag to indicate that an SM_CRASH */
 128                                 /* request came in & to stop threads cleanly */
 129 extern int in_crash;            /* Flag to single thread sm_crash requests. */
 130 extern int regfiles_only;       /* Flag to indicate symlink use in statmon */
 131 extern cond_t crash_finish;     /* Condition to wait until crash is finished */
 132 extern mutex_t sm_trylock;      /* Lock to single thread sm_try */
 133 /*
 134  * The only established lock precedence here is:
 135  *
 136  *      thr_rwlock > name_addrlock
 137  */
 138 extern mutex_t name_addrlock;   /* Locks all entries of name-to-addr table */
 139 extern rwlock_t thr_rwlock;     /* Reader/writer lock for requests coming in */
 140 extern cond_t retrywait;        /* Condition to wait before starting retry */
 141 
 142 extern char STATE[MAXPATHLEN], CURRENT[MAXPATHLEN];
 143 extern char BACKUP[MAXPATHLEN];
 144 extern int LOCAL_STATE;
 145 
 146 /*
 147  * Hash functions for monitor and record hash tables.
 148  * Functions are hashed based on first 2 letters and last 2 letters of name.
 149  * If only 1 letter in name, then, hash only on 1 letter.
 150  */
 151 #define SMHASH(name, key) { \
 152         int l; \
 153         key = *name; \
 154         if ((l = strlen(name)) != 1) \
 155                 key |= ((*(name+(l-1)) << 24) | (*(name+1) << 16) | \
 156                         (*(name+(l-2)) << 8)); \
 157         key = key % MAX_HASHSIZE; \
 158 }
 159 
 160 extern int debug;               /* Prints out debug information if set. */
 161 
 162 extern char hostname[MAXHOSTNAMELEN];
 163 
 164 /*
 165  * These variables will be used to store all the
 166  * alias names for the host, as well as the -a
 167  * command line hostnames.
 168  */
 169 extern char **host_name; /* store -a opts */
 170 extern int      host_name_count;
 171 extern int  addrix; /* # of -a entries */
 172 
 173 /*
 174  * The following 2 variables are meaningful
 175  * only under a HA configuration.
 176  */
 177 extern char **path_name; /* store -p opts */
 178 extern int  pathix; /* # of -p entries */
 179 
 180 /* Function prototypes used in program */
 181 extern int      create_file(char *name);
 182 extern void     delete_file(char *name);
 183 extern void     record_name(char *name, int op);
 184 extern void     sm_crash(void);
 185 extern void     sm_notify(stat_chge *ntfp);
 186 extern void     statd_init();
 187 extern void     merge_hosts(void);
 188 extern CLIENT   *create_client(char *, int, int, struct timeval *);
 189 extern char     *xmalloc(unsigned);
 190 extern void     sm_status(sm_name *namep, sm_stat_res *resp);
 191 extern void     sm_mon(mon *monp, sm_stat_res *resp);
 192 extern void     sm_unmon(mon_id *monidp, sm_stat *resp);
 193 extern void     sm_unmon_all(my_id *myidp, sm_stat *resp);
 194 extern void     sm_simu_crash(void *myidp);
 195 extern void     sm_inithash();
 196 extern void     copydir_from_to(char *from_dir, char *to_dir);
 197 extern int      str_cmp_unqual_hostname(char *, char *);
 198 extern void     nsmaddrproc1_reg(reg1args *, reg1res *);
 199 extern void     record_addr(char *name, sa_family_t family, struct netobj *ah);
 200 extern int      is_symlink(char *file);
 201 extern int      create_symlink(char *todir, char *rname, char *lname);
 202 extern int      str_cmp_address_specifier(char *specifier1, char *specifier2);
 203 
 204 #ifdef __cplusplus
 205 }
 206 #endif
 207 
 208 #endif /* _SM_STATD_H */