contrib/amd/amd/amd.h

   1 /*
   2  * Copyright (c) 1997-1999 Erez Zadok
   3  * Copyright (c) 1990 Jan-Simon Pendry
   4  * Copyright (c) 1990 Imperial College of Science, Technology & Medicine
   5  * Copyright (c) 1990 The Regents of the University of California.
   6  * All rights reserved.
   7  *
   8  * This code is derived from software contributed to Berkeley by
   9  * Jan-Simon Pendry at Imperial College, London.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in the
  18  *    documentation and/or other materials provided with the distribution.
  19  * 3. All advertising materials mentioning features or use of this software
  20  *    must display the following acknowledgment:
  21  *      This product includes software developed by the University of
  22  *      California, Berkeley and its contributors.
  23  * 4. Neither the name of the University nor the names of its contributors
  24  *    may be used to endorse or promote products derived from this software
  25  *    without specific prior written permission.
  26  *
  27  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  28  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  29  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  30  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  31  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  32  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  33  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  34  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  35  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  36  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  37  * SUCH DAMAGE.
  38  *
  39  *      %W% (Berkeley) %G%
  40  *
  41  * $Id: amd.h,v 1.4 1999/09/30 21:01:29 ezk Exp $
  42  *
  43  */
  44
  45 #ifndef _AMD_H
  46 #define _AMD_H
  47
  48
  49 /*
  50  * MACROS:
  51  */
  52
  53 /* options for amd.conf */
  54 #define CFM_BROWSABLE_DIRS              0x0001
  55 #define CFM_MOUNT_TYPE_AUTOFS           0x0002
  56 #define CFM_ENABLE_DEFAULT_SELECTORS    0x0004
  57 #define CFM_NORMALIZE_HOSTNAMES         0x0008
  58 #define CFM_PROCESS_LOCK                0x0010
  59 #define CFM_PRINT_PID                   0x0020
  60 #define CFM_RESTART_EXISTING_MOUNTS     0x0040
  61 #define CFM_SHOW_STATFS_ENTRIES         0x0080
  62 #define CFM_FULLY_QUALIFIED_HOSTS       0x0100
  63 #define CFM_BROWSABLE_DIRS_FULL         0x0200 /* allow '/' in readdir() */
  64 #define CFM_UNMOUNT_ON_EXIT             0x0400 /* when amd finishing */
  65
  66 /* some systems (SunOS 4.x) neglect to define the mount null message */
  67 #ifndef MOUNTPROC_NULL
  68 # define MOUNTPROC_NULL ((u_long)(0))
  69 #endif /* not MOUNTPROC_NULL */
  70
  71 /* Hash table size */
  72 #define NKVHASH (1 << 2)        /* Power of two */
  73
  74 /* interval between forced retries of a mount */
  75 #define RETRY_INTERVAL  2
  76
  77 #define ereturn(x) { *error_return = x; return 0; }
  78
  79
  80 /*
  81  * TYPEDEFS:
  82  */
  83
  84 typedef struct cf_map cf_map_t;
  85 typedef struct kv kv;
  86 /*
  87  * Cache map operations
  88  */
  89 typedef void add_fn(mnt_map *, char *, char *);
  90 typedef int init_fn(mnt_map *, char *, time_t *);
  91 typedef int mtime_fn(mnt_map *, char *, time_t *);
  92 typedef int isup_fn(mnt_map *, char *);
  93 typedef int reload_fn(mnt_map *, char *, add_fn *);
  94 typedef int search_fn(mnt_map *, char *, char *, char **, time_t *);
  95
  96
  97
  98 /*
  99  * STRUCTURES:
 100  */
 101
 102 /* global amd options that are manipulated by conf.c */
 103 struct amu_global_options {
 104   char *arch;                   /* name of current architecture */
 105   char *auto_dir;               /* automounter temp dir */
 106   char *cluster;                /* cluster name */
 107   char *karch;                  /* kernel architecture */
 108   char *logfile;                /* amd log file */
 109   char *op_sys;                 /* operating system name ${os} */
 110   char *op_sys_ver;             /* OS version ${osver} */
 111   char *op_sys_full;            /* full OS name ${full_os} */
 112   char *op_sys_vendor;          /* name of OS vendor ${vendor} */
 113   char *pid_file;               /* PID file */
 114   char *sub_domain;             /* local domain */
 115   char *map_options;            /* global map options */
 116   char *map_type;               /* global map type */
 117   char *search_path;            /* search path for maps */
 118   char *mount_type;             /* mount type for map */
 119   u_int flags;                  /* various CFM_* flags */
 120   int amfs_auto_retrans;        /* NFS retransmit counter */
 121   int amfs_auto_timeo;          /* NFS retry interval */
 122   int am_timeo;                 /* cache duration */
 123   int am_timeo_w;               /* dismount interval */
 124   int portmap_program;          /* amd RPC program number */
 125 #ifdef HAVE_MAP_HESIOD
 126   char *hesiod_base;            /* Hesiod rhs */
 127 #endif /* HAVE_MAP_HESIOD */
 128 #ifdef HAVE_MAP_LDAP
 129   char *ldap_base;              /* LDAP base */
 130   char *ldap_hostports;         /* LDAP host ports */
 131   long ldap_cache_seconds;      /* LDAP internal cache - keep seconds */
 132   long ldap_cache_maxmem;       /* LDAP internal cache - max memory (bytes) */
 133 #endif /* HAVE_MAP_LDAP */
 134 #ifdef HAVE_MAP_NIS
 135   char *nis_domain;             /* YP domain name */
 136 #endif /* HAVE_MAP_NIS */
 137 };
 138
 139 /* if you add anything here, update conf.c:reset_cf_map() */
 140 struct cf_map {
 141   char *cfm_dir;                /* /home, /u, /src */
 142   char *cfm_name;               /* amd.home, /etc/amd.home ... */
 143   char *cfm_type;               /* file, hesiod, ndbm, nis ... */
 144   char *cfm_opts;               /* -cache:=all, etc. */
 145   char *cfm_search_path;        /* /etc/local:/etc/amdmaps:/misc/yp */
 146   char *cfm_tag;                /* optional map tag for amd -T */
 147   u_int cfm_flags;              /* browsable_dirs? mount_type? */
 148 };
 149
 150 /*
 151  * Key-value pair
 152  */
 153 struct kv {
 154   kv *next;
 155   char *key;
 156 #ifdef HAVE_REGEXEC
 157   regex_t re;                   /* store the regexp from regcomp() */
 158 #endif /* HAVE_REGEXEC */
 159   char *val;
 160 };
 161
 162 struct mnt_map {
 163   qelem hdr;
 164   int refc;                     /* Reference count */
 165   short flags;                  /* Allocation flags */
 166   short alloc;                  /* Allocation mode */
 167   time_t modify;                /* Modify time of map */
 168   u_int reloads;                /* Number of times map was reloaded */
 169   char *map_name;               /* Name of this map */
 170   char *wildcard;               /* Wildcard value */
 171   reload_fn *reload;            /* Function to be used for reloads */
 172   isup_fn *isup;                /* Is service up or not? (1=up, 0=down) */
 173   search_fn *search;            /* Function to be used for searching */
 174   mtime_fn *mtime;              /* Modify time function */
 175   kv *kvhash[NKVHASH];          /* Cached data */
 176   /* options available via amd conf file */
 177   char *cf_map_type;            /* file, hesiod, ndbm, nis, etc. */
 178   char *cf_search_path;         /* /etc/local:/etc/amdmaps:/misc/yp */
 179   void *map_data;               /* Map data black box */
 180 };
 181
 182 /*
 183  * Mounting a file system may take a significant period of time.  The
 184  * problem is that if this is done in the main process thread then the
 185  * entire automounter could be blocked, possibly hanging lots of processes
 186  * on the system.  Instead we use a continuation scheme to allow mounts to
 187  * be attempted in a sub-process.  When the sub-process exits we pick up the
 188  * exit status (by convention a UN*X error number) and continue in a
 189  * notifier.  The notifier gets handed a data structure and can then
 190  * determine whether the mount was successful or not.  If not, it updates
 191  * the data structure and tries again until there are no more ways to try
 192  * the mount, or some other permanent error occurs.  In the mean time no RPC
 193  * reply is sent, even after the mount is successful.  We rely on the RPC
 194  * retry mechanism to resend the lookup request which can then be handled.
 195  */
 196 struct continuation {
 197   char **ivec;                  /* Current mount info */
 198   am_node *mp;                  /* Node we are trying to mount */
 199   char *key;                    /* Map key */
 200   char *info;                   /* Info string */
 201   char **xivec;                 /* Saved strsplit vector */
 202   char *auto_opts;              /* Automount options */
 203   am_opts fs_opts;              /* Filesystem options */
 204   char *def_opts;               /* Default automount options */
 205   int retry;                    /* Try again? */
 206   int tried;                    /* Have we tried any yet? */
 207   time_t start;                 /* Time we started this mount */
 208   int callout;                  /* Callout identifier */
 209 };
 210
 211
 212 /*
 213  * EXTERNALS:
 214  */
 215
 216 /* Amq server global functions */
 217 extern amq_mount_info_list *amqproc_getmntfs_1_svc(voidp argp, struct svc_req *rqstp);
 218 extern amq_mount_stats *amqproc_stats_1_svc(voidp argp, struct svc_req *rqstp);
 219 extern amq_mount_tree_list *amqproc_export_1_svc(voidp argp, struct svc_req *rqstp);
 220 extern amq_mount_tree_p *amqproc_mnttree_1_svc(voidp argp, struct svc_req *rqstp);
 221 extern amq_string *amqproc_getvers_1_svc(voidp argp, struct svc_req *rqstp);
 222 extern int *amqproc_getpid_1_svc(voidp argp, struct svc_req *rqstp);
 223 extern int *amqproc_mount_1_svc(voidp argp, struct svc_req *rqstp);
 224 extern int *amqproc_setopt_1_svc(voidp argp, struct svc_req *rqstp);
 225 extern voidp amqproc_null_1_svc(voidp argp, struct svc_req *rqstp);
 226 extern voidp amqproc_umnt_1_svc(voidp argp, struct svc_req *rqstp);
 227
 228 /* other external definitions */
 229 extern am_nfs_fh *root_fh(char *dir);
 230 extern am_node * autofs_lookuppn(am_node *mp, char *fname, int *error_return, int op);
 231 extern am_node *find_ap(char *);
 232 extern am_node *find_ap2(char *, am_node *);
 233 extern bool_t xdr_amq_mount_info_qelem(XDR *xdrs, qelem *qhead);
 234 extern fserver *find_nfs_srvr(mntfs *mf);
 235 extern int auto_fmount(am_node *mp);
 236 extern int auto_fumount(am_node *mp);
 237 extern int mount_nfs_fh(am_nfs_handle_t *fhp, char *dir, char *fs_name, char *opts, mntfs *mf);
 238 extern int process_last_regular_map(void);
 239 extern int set_conf_kv(const char *section, const char *k, const char *v);
 240 extern int try_mount(voidp mvp);
 241 extern int yyparse (void);
 242 extern nfsentry *make_entry_chain(am_node *mp, const nfsentry *current_chain, int fully_browsable);
 243 extern void amfs_auto_cont(int rc, int term, voidp closure);
 244 extern void amfs_auto_mkcacheref(mntfs *mf);
 245 extern void amfs_auto_retry(int rc, int term, voidp closure);
 246 extern void assign_error_mntfs(am_node *mp);
 247 extern void flush_srvr_nfs_cache(void);
 248 extern void free_continuation(struct continuation *cp);
 249 extern void mf_mounted(mntfs *mf);
 250 extern void quick_reply(am_node *mp, int error);
 251 extern void root_newmap(const char *, const char *, const char *, const cf_map_t *);
 252
 253 /* amd global variables */
 254 extern FILE *yyin;
 255 extern SVCXPRT *nfs_program_2_transp;   /* For quick_reply() */
 256 extern char *conf_tag;
 257 extern int NumChild;
 258 extern int fwd_sock;
 259 extern int select_intr_valid;
 260 extern int usage;
 261 extern int use_conf_file;       /* use amd configuration file */
 262 extern jmp_buf select_intr;
 263 extern qelem mfhead;
 264 extern struct amu_global_options gopt;  /* where global options are stored */
 265
 266 #ifdef HAVE_SIGACTION
 267 extern sigset_t masked_sigs;
 268 #endif /* HAVE_SIGACTION */
 269
 270 #if defined(HAVE_AM_FS_LINK) || defined(HAVE_AM_FS_LINKX)
 271 extern char *amfs_link_match(am_opts *fo);
 272 extern int amfs_link_fumount(mntfs *mf);
 273 #endif /* defined(HAVE_AM_FS_LINK) || defined(HAVE_AM_FS_LINKX) */
 274
 275 #ifdef HAVE_AM_FS_NFSL
 276 extern char *nfs_match(am_opts *fo);
 277 #endif /* HAVE_AM_FS_NFSL */
 278
 279 #if defined(HAVE_FS_NFS3) && !defined(HAVE_XDR_MOUNTRES3)
 280 extern bool_t xdr_mountres3(XDR *xdrs, mountres3 *objp);
 281 #endif /* defined(HAVE_FS_NFS3) && !defined(HAVE_XDR_MOUNTRES3) */
 282
 283 #ifdef HAVE_FS_AUTOFS
 284 extern SVCXPRT *autofsxprt;
 285 extern u_short autofs_port;
 286 extern int amd_use_autofs;
 287
 288 extern int autofs_mount(am_node *mp);
 289 extern int autofs_umount(am_node *mp);
 290 extern int create_autofs_service(int *soAUTOFSp, u_short *autofs_portp, SVCXPRT **autofs_xprtp, void (*dispatch_fxn)(struct svc_req *rqstp, SVCXPRT *transp));
 291 extern int svc_create_local_service(void (*dispatch) (), u_long prognum, u_long versnum, char *nettype, char *servname);
 292 extern void autofs_mounted(mntfs *mf);
 293 extern void autofs_program_1(struct svc_req *rqstp, SVCXPRT *transp);
 294 #endif /* HAVE_FS_AUTOFS */
 295
 296 /* Unix file system (irix) */
 297 #ifdef HAVE_FS_XFS
 298 extern am_ops xfs_ops;          /* Un*x file system */
 299 #endif /* HAVE_FS_XFS */
 300
 301 /* Unix file system (irix) */
 302 #ifdef HAVE_FS_EFS
 303 extern am_ops efs_ops;          /* Un*x file system */
 304 #endif /* HAVE_FS_EFS */
 305
 306 #endif /* not _AMD_H */