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/*
* Copyright (c) 1990 Jan-Simon Pendry
* Copyright (c) 1990 Imperial College of Science, Technology & Medicine
* Copyright (c) 1990, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Jan-Simon Pendry at Imperial College, London.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* from: @(#)am.h 5.6 (Berkeley) 6/6/93
* $Id: am.h,v 1.3 1994/06/13 20:50:34 mycroft Exp $
*
*/
#include "config.h"
/*
* Global declarations
*/
#include <sys/param.h>
#include <sys/socket.h>
#include <rpc/rpc.h>
#include "nfs_prot.h"
#ifdef MNTENT_HDR
#include MNTENT_HDR
#endif /* MNTENT_HDR */
#include <assert.h>
#ifdef DEBUG_MEM
#include <malloc.h>
#endif /* DEBUG_MEM */
#ifndef MAXHOSTNAMELEN
#define MAXHOSTNAMELEN 64
#endif /* MAXHOSTNAMELEN */
#ifndef MNTTYPE_AUTO
#define MNTTYPE_AUTO "auto"
#endif /* MNTTYPE_AUTO */
#ifndef FALSE
#define FALSE 0
#define TRUE 1
#endif /* FALSE */
#ifndef ROOT_MAP
#define ROOT_MAP "\"root\""
#endif /* ROOT_MAP */
/*
* Flags from command line
*/
extern int print_pid; /* Print pid to stdout */
extern int normalize_hosts; /* Normalize host names before use */
extern int restart_existing_mounts;
#ifdef HAS_NIS_MAPS
extern char *domain; /* NIS domain to use */
#endif /* HAS_NIS_MAPS */
extern int am_timeo; /* Cache period */
extern int afs_timeo; /* AFS timeout */
extern int afs_retrans; /* AFS retrans */
extern int am_timeo_w; /* Unmount timeout */
extern char *mtab; /* Mount table */
typedef enum {
Start,
Run,
Finishing,
Quit,
Done
} serv_state;
extern serv_state amd_state; /* Should we go now */
extern int immediate_abort; /* Should close-down unmounts be retried */
extern time_t do_mapc_reload; /* Flush & reload mount map cache */
/*
* Useful constants
*/
extern char pid_fsname[]; /* kiska.southseas.nz:(pid%d) */
extern char hostd[]; /* "kiska.southseas.nz" */
extern char *hostdomain; /* "southseas.nz" */
extern char *op_sys; /* "sos4" */
extern char *arch; /* "sun4" */
extern char *karch; /* "sun4c" */
extern char *cluster; /* "r+d-kluster" */
extern char *endian; /* "big" */
extern char *auto_dir; /* "/a" */
extern char copyright[]; /* Copyright info */
extern char version[]; /* Version info */
typedef struct am_ops am_ops;
typedef struct am_node am_node;
typedef struct am_opts am_opts;
typedef struct mntfs mntfs;
typedef struct fserver fserver;
typedef struct fsrvinfo fsrvinfo;
/*
* Debug defns.
*/
#ifdef DEBUG
#define DEBUG_MTAB "./mtab"
extern int debug_flags; /* Debug options */
#define D_DAEMON 0x0001 /* Enter daemon mode */
#define D_TRACE 0x0002 /* Do protocol trace */
#define D_FULL 0x0004 /* Do full trace */
#define D_MTAB 0x0008 /* Use local mtab */
#define D_AMQ 0x0010 /* Register amq program */
#define D_STR 0x0020 /* Debug string munging */
#define D_MEM 0x0040 /* Trace memory allocations */
/*
* Normally, don't enter daemon mode, and don't register amq
*/
#define D_TEST (~(D_DAEMON|D_MEM|D_STR))
#endif /* DEBUG */
/*
* Global variables.
*/
extern unsigned short nfs_port; /* Our NFS service port */
extern struct in_addr myipaddr; /* (An) IP address of this host */
extern int foreground; /* Foreground process */
extern time_t next_softclock; /* Time to call softclock() */
extern int task_notify_todo; /* Task notifier needs running */
#ifdef HAS_TFS
extern int nfs_server_code_available;
#endif /* HAS_TFS */
extern int last_used_map; /* Last map being used for mounts */
extern AUTH *nfs_auth; /* Dummy uthorisation for remote servers */
extern am_node **exported_ap; /* List of nodes */
extern int first_free_map; /* First free node */
extern am_node *root_node; /* Node for "root" */
extern char *wire; /* Name of primary connected network */
#define NEXP_AP (254)
#define NEXP_AP_MARGIN (128)
typedef int (*task_fun)P((voidp));
typedef void (*cb_fun)P((int, int, voidp));
typedef void (*fwd_fun)P((voidp, int, struct sockaddr_in *,
struct sockaddr_in *, voidp, int));
/*
* String comparison macros
*/
#define STREQ(s1, s2) (strcmp((s1), (s2)) == 0)
#define FSTREQ(s1, s2) ((*(s1) == *(s2)) && STREQ((s1),(s2)))
/*
* Linked list
*/
typedef struct qelem qelem;
struct qelem {
qelem *q_forw;
qelem *q_back;
};
#define FIRST(ty, q) ((ty *) ((q)->q_forw))
#define LAST(ty, q) ((ty *) ((q)->q_back))
#define NEXT(ty, q) ((ty *) (((qelem *) q)->q_forw))
#define PREV(ty, q) ((ty *) (((qelem *) q)->q_back))
#define HEAD(ty, q) ((ty *) q)
#define ITER(v, ty, q) \
for ((v) = FIRST(ty,(q)); (v) != HEAD(ty,(q)); (v) = NEXT(ty,(v)))
/*
* List of mount table entries
*/
typedef struct mntlist mntlist;
struct mntlist {
struct mntlist *mnext;
struct mntent *mnt;
};
/*
* Mount map
*/
typedef struct mnt_map mnt_map;
/*
* Global routines
*/
extern int atoi P((Const char *)); /* C */
extern void am_mounted P((am_node*));
extern void am_unmounted P((am_node*));
extern int background(P_void);
extern int bind_resv_port P((int, unsigned short*));
extern int compute_mount_flags P((struct mntent *));
extern int softclock(P_void);
#ifdef DEBUG
extern int debug_option P((char*));
#endif /* DEBUG */
extern void deslashify P((char*));
/*extern void domain_strip P((char*, char*));*/
extern mntfs* dup_mntfs P((mntfs*));
extern fserver* dup_srvr P((fserver*));
extern int eval_fs_opts P((am_opts*, char*, char*, char*, char*, char*));
extern char* expand_key P((char*));
extern am_node* exported_ap_alloc(P_void);
extern am_node* find_ap P((char*));
extern am_node* find_mf P((mntfs*));
extern mntfs* find_mntfs P((am_ops*, am_opts*, char*, char*, char*, char*, char*));
extern void flush_mntfs(P_void);
extern void flush_nfs_fhandle_cache P((fserver*));
extern void forcibly_timeout_mp P((am_node*));
extern FREE_RETURN_TYPE free P((voidp)); /* C */
extern void free_mntfs P((mntfs*));
extern void free_opts P((am_opts*));
extern void free_map P((am_node*));
extern void free_mntlist P((mntlist*));
extern void free_srvr P((fserver*));
extern int fwd_init(P_void);
extern int fwd_packet P((int, voidp, int, struct sockaddr_in *,
struct sockaddr_in *, voidp, fwd_fun));
extern void fwd_reply(P_void);
extern void get_args P((int, char*[]));
extern char *getwire P((void));
#ifdef NEED_MNTOPT_PARSER
extern char *hasmntopt P((struct mntent*, char*));
#endif /* NEED_MNTOPT_PARSER */
extern int hasmntval P((struct mntent*, char*));
extern void host_normalize P((char **));
extern char *inet_dquad P((char*, unsigned long));
extern void init_map P((am_node*, char*));
extern void insert_am P((am_node*, am_node*));
extern void ins_que P((qelem*, qelem*));
extern int islocalnet P((unsigned long));
extern int make_nfs_auth P((void));
extern void make_root_node(P_void);
extern int make_rpc_packet P((char*, int, u_long, struct rpc_msg*, voidp, xdrproc_t, AUTH*));
extern void map_flush_srvr P((fserver*));
extern void mapc_add_kv P((mnt_map*, char*, char*));
extern mnt_map* mapc_find P((char*, char*));
extern void mapc_free P((mnt_map*));
extern int mapc_keyiter P((mnt_map*, void (*)(char*,voidp), voidp));
extern int mapc_search P((mnt_map*, char*, char**));
extern void mapc_reload(P_void);
extern void mapc_showtypes P((FILE*));
extern int mkdirs P((char*, int));
extern void mk_fattr P((am_node*, enum ftype));
extern void mnt_free P((struct mntent*));
extern int mount_auto_node P((char*, voidp));
extern int mount_automounter P((int));
extern int mount_exported(P_void);
extern int mount_fs P((struct mntent*, int, caddr_t, int, MTYPE_TYPE));
/*extern int mount_nfs_fh P((struct fhstatus*, char*, char*, char*, mntfs*));*/
extern int mount_node P((am_node*));
extern mntfs* new_mntfs(P_void);
extern void new_ttl P((am_node*));
extern am_node* next_map P((int*));
extern int nfs_srvr_port P((fserver*, u_short*, voidp));
extern void normalize_slash P((char*));
extern void ops_showfstypes P((FILE*));
extern int pickup_rpc_reply P((voidp, int, voidp, xdrproc_t));
extern mntlist* read_mtab P((char*));
extern mntfs* realloc_mntfs P((mntfs*, am_ops*, am_opts*, char*, char*, char*, char*, char*));
extern void rem_que P((qelem*));
extern void reschedule_timeout_mp(P_void);
extern void restart(P_void);
#ifdef UPDATE_MTAB
extern void rewrite_mtab P((mntlist *));
#endif /* UPDATE_MTAB */
extern void rmdirs P((char*));
extern am_node* root_ap P((char*, int));
extern int root_keyiter P((void (*)(char*,voidp), voidp));
extern void root_newmap P((char*, char*, char*));
extern void rpc_msg_init P((struct rpc_msg*, u_long, u_long, u_long));
extern void run_task P((task_fun, voidp, cb_fun, voidp));
extern void sched_task P((cb_fun, voidp, voidp));
extern void show_rcs_info P((Const char*, char*));
extern void sigchld P((int));
extern void srvrlog P((fserver*, char*));
extern char* str3cat P((char*, char*, char*, char*));
extern char* strcat P((char*, Const char*)); /* C */
extern int strcmp P((Const char*, Const char*)); /* C */
extern char* strdup P((Const char*));
extern int strlen P((Const char*)); /* C */
extern char* strnsave P((Const char*, int));
extern char* strrchr P((Const char*, int)); /* C */
extern char* strealloc P((char*, char *));
extern char** strsplit P((char*, int, int));
extern int switch_option P((char*));
extern int switch_to_logfile P((char*));
extern void do_task_notify(P_void);
extern int timeout P((unsigned int, void (*fn)(), voidp));
extern void timeout_mp(P_void);
extern void umount_exported(P_void);
extern int umount_fs P((char*));
/*extern int unmount_node P((am_node*));
extern int unmount_node_wrap P((voidp));*/
extern void unregister_amq(P_void);
extern void untimeout P((int));
extern int valid_key P((char*));
extern void wakeup P((voidp));
extern void wakeup_task P((int,int,voidp));
extern void wakeup_srvr P((fserver*));
extern void write_mntent P((struct mntent*));
#ifdef UPDATE_MTAB
extern void unlock_mntlist P((void));
#else
#define unlock_mntlist()
#endif /* UPDATE_MTAB */
#define ALLOC(ty) ((struct ty *) xmalloc(sizeof(struct ty)))
/*
* Options
*/
struct am_opts {
char *fs_glob; /* Smashed copy of global options */
char *fs_local; /* Expanded copy of local options */
char *fs_mtab; /* Mount table entry */
/* Other options ... */
char *opt_dev;
char *opt_delay;
char *opt_dir;
char *opt_fs;
char *opt_group;
char *opt_mount;
char *opt_opts;
char *opt_remopts;
char *opt_pref;
char *opt_cache;
char *opt_rfs;
char *opt_rhost;
char *opt_sublink;
char *opt_type;
char *opt_unmount;
char *opt_user;
};
/*
* File Handle
*
* This is interpreted by indexing the exported array
* by fhh_id.
*
* The whole structure is mapped onto a standard fhandle_t
* when transmitted.
*/
struct am_fh {
int fhh_pid; /* process id */
int fhh_id; /* map id */
int fhh_gen; /* generation number */
};
extern am_node *fh_to_mp P((nfs_fh*));
extern am_node *fh_to_mp3 P((nfs_fh*,int*,int));
extern void mp_to_fh P((am_node*, nfs_fh*));
#define fh_to_mp2(fhp, rp) fh_to_mp3(fhp, rp, VLOOK_CREATE)
extern int auto_fmount P((am_node *mp));
extern int auto_fumount P((am_node *mp));
#define MAX_READDIR_ENTRIES 16
typedef char* (*vfs_match)P((am_opts*));
typedef int (*vfs_init)P((mntfs*));
typedef int (*vmount_fs)P((am_node*));
typedef int (*vfmount_fs)P((mntfs*));
typedef int (*vumount_fs)P((am_node*));
typedef int (*vfumount_fs)P((mntfs*));
typedef am_node*(*vlookuppn)P((am_node*, char*, int*, int));
typedef int (*vreaddir)P((am_node*, nfscookie, dirlist*, entry*, int));
typedef am_node*(*vreadlink)P((am_node*, int*));
typedef void (*vmounted)P((mntfs*));
typedef void (*vumounted)P((am_node*));
typedef fserver*(*vffserver)P((mntfs*));
struct am_ops {
char *fs_type;
vfs_match fs_match;
vfs_init fs_init;
vmount_fs mount_fs;
vfmount_fs fmount_fs;
vumount_fs umount_fs;
vfumount_fs fumount_fs;
vlookuppn lookuppn;
vreaddir readdir;
vreadlink readlink;
vmounted mounted;
vumounted umounted;
vffserver ffserver;
int fs_flags;
};
extern am_node *efs_lookuppn P((am_node*, char*, int*, int));
extern int efs_readdir P((am_node*, nfscookie, dirlist*, entry*, int));
#define VLOOK_CREATE 0x1
#define VLOOK_DELETE 0x2
#define FS_DIRECTORY 0x0001 /* This looks like a dir, not a link */
#define FS_MBACKGROUND 0x0002 /* Should background this mount */
#define FS_NOTIMEOUT 0x0004 /* Don't bother with timeouts */
#define FS_MKMNT 0x0008 /* Need to make the mount point */
#define FS_UBACKGROUND 0x0010 /* Unmount in background */
#define FS_BACKGROUND (FS_MBACKGROUND|FS_UBACKGROUND)
#define FS_DISCARD 0x0020 /* Discard immediately on last reference */
#define FS_AMQINFO 0x0040 /* Amq is interested in this fs type */
#ifdef SUNOS4_COMPAT
extern am_ops *sunos4_match P((am_opts*, char*, char*, char*, char*, char*));
#endif /* SUNOS4_COMPAT */
extern am_ops *ops_match P((am_opts*, char*, char*, char*, char*, char*));
#include "fstype.h"
/*
* Per-mountpoint statistics
*/
struct am_stats {
time_t s_mtime; /* Mount time */
u_short s_uid; /* Uid of mounter */
int s_getattr; /* Count of getattrs */
int s_lookup; /* Count of lookups */
int s_readdir; /* Count of readdirs */
int s_readlink; /* Count of readlinks */
int s_statfs; /* Count of statfs */
};
typedef struct am_stats am_stats;
/*
* System statistics
*/
struct amd_stats {
int d_drops; /* Dropped requests */
int d_stale; /* Stale NFS handles */
int d_mok; /* Succesful mounts */
int d_merr; /* Failed mounts */
int d_uerr; /* Failed unmounts */
};
extern struct amd_stats amd_stats;
/*
* List of fileservers
*/
struct fserver {
qelem fs_q; /* List of fileservers */
int fs_refc; /* Number of references to this node */
char *fs_host; /* Normalized hostname of server */
struct sockaddr_in *fs_ip; /* Network address of server */
int fs_cid; /* Callout id */
int fs_pinger; /* Ping (keepalive) interval */
int fs_flags; /* Flags */
char *fs_type; /* File server type */
voidp fs_private; /* Private data */
void (*fs_prfree)(); /* Free private data */
};
#define FSF_VALID 0x0001 /* Valid information available */
#define FSF_DOWN 0x0002 /* This fileserver is thought to be down */
#define FSF_ERROR 0x0004 /* Permanent error has occured */
#define FSF_WANT 0x0008 /* Want a wakeup call */
#define FSF_PINGING 0x0010 /* Already doing pings */
#define FSRV_ISDOWN(fs) (((fs)->fs_flags & (FSF_DOWN|FSF_VALID)) == (FSF_DOWN|FSF_VALID))
#define FSRV_ISUP(fs) (((fs)->fs_flags & (FSF_DOWN|FSF_VALID)) == (FSF_VALID))
/*
* List of mounted filesystems
*/
struct mntfs {
qelem mf_q; /* List of mounted filesystems */
am_ops *mf_ops; /* Operations on this mountpoint */
am_opts *mf_fo; /* File opts */
char *mf_mount; /* "/a/kiska/home/kiska" */
char *mf_info; /* Mount info */
char *mf_auto; /* Automount opts */
char *mf_mopts; /* FS mount opts */
char *mf_remopts; /* Remote FS mount opts */
fserver *mf_server; /* File server */
int mf_flags; /* Flags */
int mf_error; /* Error code from background mount */
int mf_refc; /* Number of references to this node */
int mf_cid; /* Callout id */
void (*mf_prfree)(); /* Free private space */
voidp mf_private; /* Private - per-fs data */
};
#define MFF_MOUNTED 0x0001 /* Node is mounted */
#define MFF_MOUNTING 0x0002 /* Mount is in progress */
#define MFF_UNMOUNTING 0x0004 /* Unmount is in progress */
#define MFF_RESTART 0x0008 /* Restarted node */
#define MFF_MKMNT 0x0010 /* Delete this node's am_mount */
#define MFF_ERROR 0x0020 /* This node failed to mount */
#define MFF_LOGDOWN 0x0040 /* Logged that this mount is down */
#define MFF_RSTKEEP 0x0080 /* Don't timeout this filesystem - restarted */
#define MFF_WANTTIMO 0x0100 /* Need a timeout call when not busy */
/*
* Map of auto-mount points.
*/
struct am_node {
int am_mapno; /* Map number */
mntfs *am_mnt; /* Mounted filesystem */
char *am_name; /* "kiska"
Name of this node */
char *am_path; /* "/home/kiska"
Path of this node's mount point */
char *am_link; /* "/a/kiska/home/kiska/this/that"
Link to sub-directory */
am_node *am_parent, /* Parent of this node */
*am_ysib, /* Younger sibling of this node */
*am_osib, /* Older sibling of this node */
*am_child; /* First child of this node */
struct attrstat am_attr; /* File attributes */
#define am_fattr am_attr.attrstat_u.attributes
int am_flags; /* Boolean flags */
int am_error; /* Specific mount error */
time_t am_ttl; /* Time to live */
int am_timeo_w; /* Wait interval */
int am_timeo; /* Timeout interval */
unsigned int am_gen; /* Generation number */
char *am_pref; /* Mount info prefix */
am_stats am_stats; /* Statistics gathering */
};
#define AMF_NOTIMEOUT 0x0001 /* This node never times out */
#define AMF_ROOT 0x0002 /* This is a root node */
#define ONE_HOUR (60 * 60) /* One hour in seconds */
/*
* The following values can be tuned...
*/
#define ALLOWED_MOUNT_TIME 40 /* 40s for a mount */
#define AM_TTL (5 * 60) /* Default cache period */
#define AM_TTL_W (2 * 60) /* Default unmount interval */
#define AM_PINGER 30 /* NFS ping interval for live systems */
#define AFS_TIMEO 8 /* Default afs timeout - .8s */
#define AFS_RETRANS ((ALLOWED_MOUNT_TIME*10+5*afs_timeo)/afs_timeo * 2)
/* Default afs retrans - 1/10th seconds */
#define RPC_XID_PORTMAP 0
#define RPC_XID_MOUNTD 1
#define RPC_XID_NFSPING 2
#define RPC_XID_MASK (0x0f) /* 16 id's for now */
#define MK_RPC_XID(type_id, uniq) ((type_id) | ((uniq) << 4))
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