ref: 8188b4f4f0e07b6669e6ae3c6c1099af917eaab4
dir: /sys/src/cmd/9nfs/nfsmount.c/
#include "all.h"
/*
* Cf. /lib/rfc/rfc1094
*/
static int mntnull(int, Rpccall*, Rpccall*);
static int mntmnt(int, Rpccall*, Rpccall*);
static int mntdump(int, Rpccall*, Rpccall*);
static int mntumnt(int, Rpccall*, Rpccall*);
static int mntumntall(int, Rpccall*, Rpccall*);
static int mntexport(int, Rpccall*, Rpccall*);
Procmap mntproc[] = {
0, mntnull,
1, mntmnt,
2, mntdump,
3, mntumnt,
4, mntumntall,
5, mntexport,
0, 0
};
long starttime;
static int noauth;
char * config;
Session * head;
Session * tail;
int staletime = 10*60;
void
mnttimer(long now)
{
Session *s;
for(s=head; s; s=s->next)
fidtimer(s, now);
}
static void
usage(void)
{
sysfatal("usage: %s %s [-ns] [-a dialstring] [-c uidmap] [-f srvfile] "
"[-T staletime]", argv0, commonopts);
}
void
mntinit(int argc, char **argv)
{
int tries;
config = "config";
starttime = time(0);
clog("nfs mount server init, starttime = %lud\n", starttime);
tries = 0;
ARGBEGIN{
case 'a':
++tries;
srvinit(-1, 0, EARGF(usage()));
break;
case 'c':
config = EARGF(usage());
break;
case 'f':
++tries;
srvinit(-1, EARGF(usage()), 0);
break;
case 'n':
++noauth;
break;
case 's':
++tries;
srvinit(1, 0, 0);
break;
case 'T':
staletime = atoi(EARGF(usage()));
break;
default:
if(argopt(ARGC()) < 0)
sysfatal("usage: %s %s [-ns] [-a dialstring] "
"[-c uidmap] [-f srvfile] [-T staletime]",
argv0, commonopts);
break;
}ARGEND
noauth=1; /* ZZZ */
if(tries == 0 && head == 0)
srvinit(-1, 0, "tcp!fs");
if(head == 0)
panic("can't initialize services");
readunixidmaps(config);
}
void
srvinit(int fd, char *file, char *addr)
{
char fdservice[16], *naddr;
Session *s;
Xfile *xp;
Xfid *xf;
Fid *f;
s = calloc(1, sizeof(Session));
s->spec = "";
s->fd = -1;
if(fd >= 0){
s->fd = fd;
sprint(fdservice, "/fd/%d", s->fd);
s->service = strstore(fdservice);
chat("fd = %d\n", s->fd);
}else if(file){
chat("file = \"%s\"\n", file);
s->service = file;
s->fd = open(file, ORDWR);
if(s->fd < 0){
clog("can't open %s: %r\n", file);
goto error;
}
}else if(addr){
chat("addr = \"%s\"\n", addr);
naddr = netmkaddr(addr, 0, "9fs");
s->service = addr;
s->fd = dial(naddr, 0, 0, 0);
if(s->fd < 0){
clog("can't dial %s: %r\n", naddr);
goto error;
}
}
chat("version...");
s->tag = NOTAG-1;
s->f.msize = Maxfdata+IOHDRSZ;
s->f.version = "9P2000";
xmesg(s, Tversion);
messagesize = IOHDRSZ+s->f.msize;
chat("version spec %s size %d\n", s->f.version, s->f.msize);
s->tag = 0;
chat("authenticate...");
if(authhostowner(s) < 0){
clog("auth failed %r\n");
goto error;
}
chat("attach as none...");
f = newfid(s);
s->f.fid = f - s->fids;
s->f.afid = ~0x0UL;
s->f.uname = "none";
s->f.aname = s->spec;
if(xmesg(s, Tattach)){
clog("attach failed\n");
goto error;
}
xp = xfile(&s->f.qid, s, 1);
s->root = xp;
xp->parent = xp;
xp->name = "/";
xf = xfid("none", xp, 1);
xf->urfid = f;
clog("service=%s uid=%s fid=%zd\n",
s->service, xf->uid, xf->urfid - s->fids);
if(tail)
tail->next = s;
else
head = s;
tail = s;
return;
error:
if(s->fd >= 0)
close(s->fd);
free(s);
}
static int
mntnull(int n, Rpccall *cmd, Rpccall *reply)
{
USED(n, cmd, reply);
chat("mntnull\n");
return 0;
}
static int
mntmnt(int n, Rpccall *cmd, Rpccall *reply)
{
int i;
char dom[64];
uchar *argptr = cmd->args;
uchar *dataptr = reply->results;
Authunix au;
Xfile *xp;
String root;
chat("mntmnt...\n");
if(n < 8)
return garbage(reply, "n too small");
argptr += string2S(argptr, &root);
if(argptr != &((uchar *)cmd->args)[n])
return garbage(reply, "bad count");
clog("host=%I, port=%ld, root=\"%.*s\"...",
cmd->host, cmd->port, utfnlen(root.s, root.n), root.s);
if(auth2unix(&cmd->cred, &au) != 0){
chat("auth flavor=%ld, count=%ld\n",
cmd->cred.flavor, cmd->cred.count);
for(i=0; i<cmd->cred.count; i++)
chat(" %.2ux", ((uchar *)cmd->cred.data)[i]);
chat("\n");
clog("auth: bad credentials");
return error(reply, 1);
}
clog("auth: %ld %.*s u=%ld g=%ld",
au.stamp, utfnlen(au.mach.s, au.mach.n), au.mach.s, au.uid, au.gid);
for(i=0; i<au.gidlen; i++)
chat(", %ld", au.gids[i]);
chat("...");
if(getdom(cmd->host, dom, sizeof(dom))<0){
clog("auth: unknown ip address");
return error(reply, 1);
}
chat("dom=%s...", dom);
xp = xfroot(root.s, root.n);
if(xp == 0){
chat("xp=0...");
clog("mntmnt: no fs");
return error(reply, 3);
}
PLONG(0);
dataptr += xp2fhandle(xp, dataptr);
chat("OK\n");
return dataptr - (uchar *)reply->results;
}
static int
mntdump(int n, Rpccall *cmd, Rpccall *reply)
{
if(n != 0)
return garbage(reply, "mntdump");
USED(cmd);
chat("mntdump...");
return error(reply, FALSE);
}
static int
mntumnt(int n, Rpccall *cmd, Rpccall *reply)
{
if(n <= 0)
return garbage(reply, "mntumnt");
USED(cmd);
chat("mntumnt\n");
return 0;
}
static int
mntumntall(int n, Rpccall *cmd, Rpccall *reply)
{
if(n != 0)
return garbage(reply, "mntumntall");
USED(cmd);
chat("mntumntall\n");
return 0;
}
static int
mntexport(int n, Rpccall *cmd, Rpccall *reply)
{
uchar *dataptr = reply->results;
Authunix au;
int i;
chat("mntexport...");
if(n != 0)
return garbage(reply, "mntexport");
if(auth2unix(&cmd->cred, &au) != 0){
chat("auth flavor=%ld, count=%ld\n",
cmd->cred.flavor, cmd->cred.count);
for(i=0; i<cmd->cred.count; i++)
chat(" %.2ux", ((uchar *)cmd->cred.data)[i]);
chat("...");
au.mach.n = 0;
}else
chat("%ld@%.*s...", au.uid, utfnlen(au.mach.s, au.mach.n), au.mach.s);
PLONG(TRUE);
PLONG(1);
PPTR("/", 1);
if(au.mach.n > 0){
PLONG(TRUE);
PLONG(au.mach.n);
PPTR(au.mach.s, au.mach.n);
}
PLONG(FALSE);
PLONG(FALSE);
chat("OK\n");
return dataptr - (uchar *)reply->results;
}
Xfile *
xfroot(char *name, int n)
{
Session *s;
char *p;
if(n <= 0)
n = strlen(name);
chat("xfroot: %.*s...", utfnlen(name, n), name);
if(n == 1 && name[0] == '/')
return head->root;
for(s=head; s; s=s->next){
if(strncmp(name, s->service, n) == 0)
return s->root;
p = strrchr(s->service, '!'); /* for -a tcp!foo */
if(p && strncmp(name, p+1, n) == 0)
return s->root;
p = strrchr(s->service, '/'); /* for -f /srv/foo */
if(p && strncmp(name, p+1, n) == 0)
return s->root;
}
return 0;
}