1 46f79934 2005-01-04 devnull /* Copyright (C) 2003 Russ Cox, Massachusetts Institute of Technology */
  2 46f79934 2005-01-04 devnull /* See COPYRIGHT */
  3 46f79934 2005-01-04 devnull 
  4 46f79934 2005-01-04 devnull #include <u.h>
  5 46f79934 2005-01-04 devnull #include <libc.h>
  6 46f79934 2005-01-04 devnull #include <fcall.h>
  7 46f79934 2005-01-04 devnull #include <9pclient.h>
  8 46f79934 2005-01-04 devnull #include <thread.h>
  9 46f79934 2005-01-04 devnull #include "fsimpl.h"
 10 46f79934 2005-01-04 devnull 
 11 46f79934 2005-01-04 devnull static int _fssend(Mux*, void*);
 12 46f79934 2005-01-04 devnull static void *_fsrecv(Mux*);
 13 46f79934 2005-01-04 devnull static int _fsgettag(Mux*, void*);
 14 46f79934 2005-01-04 devnull static int _fssettag(Mux*, void*, uint);
 15 46f79934 2005-01-04 devnull 
 16 59518849 2005-02-11 devnull int chatty9pclient;
 17 73a5509a 2006-07-23 devnull int eofkill9pclient;
 18 59518849 2005-02-11 devnull 
 19 46f79934 2005-01-04 devnull enum
 20 46f79934 2005-01-04 devnull {
 21 46f79934 2005-01-04 devnull 	CFidchunk = 32
 22 46f79934 2005-01-04 devnull };
 23 46f79934 2005-01-04 devnull 
 24 46f79934 2005-01-04 devnull CFsys*
 25 46f79934 2005-01-04 devnull fsinit(int fd)
 26 46f79934 2005-01-04 devnull {
 27 46f79934 2005-01-04 devnull 	CFsys *fs;
 28 59518849 2005-02-11 devnull 	int n;
 29 fa325e9b 2020-01-10 cross 
 30 46f79934 2005-01-04 devnull 	fmtinstall('F', fcallfmt);
 31 46f79934 2005-01-04 devnull 	fmtinstall('D', dirfmt);
 32 46f79934 2005-01-04 devnull 	fmtinstall('M', dirmodefmt);
 33 46f79934 2005-01-04 devnull 
 34 46f79934 2005-01-04 devnull 	fs = mallocz(sizeof(CFsys), 1);
 35 2d70c581 2005-07-13 devnull 	if(fs == nil){
 36 2d70c581 2005-07-13 devnull 		werrstr("mallocz: %r");
 37 46f79934 2005-01-04 devnull 		return nil;
 38 2d70c581 2005-07-13 devnull 	}
 39 46f79934 2005-01-04 devnull 	fs->fd = fd;
 40 46f79934 2005-01-04 devnull 	fs->ref = 1;
 41 46f79934 2005-01-04 devnull 	fs->mux.aux = fs;
 42 46f79934 2005-01-04 devnull 	fs->mux.mintag = 0;
 43 46f79934 2005-01-04 devnull 	fs->mux.maxtag = 256;
 44 46f79934 2005-01-04 devnull 	fs->mux.send = _fssend;
 45 46f79934 2005-01-04 devnull 	fs->mux.recv = _fsrecv;
 46 46f79934 2005-01-04 devnull 	fs->mux.gettag = _fsgettag;
 47 46f79934 2005-01-04 devnull 	fs->mux.settag = _fssettag;
 48 46f79934 2005-01-04 devnull 	fs->iorecv = ioproc();
 49 46f79934 2005-01-04 devnull 	fs->iosend = ioproc();
 50 46f79934 2005-01-04 devnull 	muxinit(&fs->mux);
 51 fa325e9b 2020-01-10 cross 
 52 74dd0321 2010-12-07 rsc 	strcpy(fs->version, "9P2000");
 53 59518849 2005-02-11 devnull 	if((n = fsversion(fs, 8192, fs->version, sizeof fs->version)) < 0){
 54 2d70c581 2005-07-13 devnull 		werrstr("fsversion: %r");
 55 59518849 2005-02-11 devnull 		_fsunmount(fs);
 56 59518849 2005-02-11 devnull 		return nil;
 57 59518849 2005-02-11 devnull 	}
 58 59518849 2005-02-11 devnull 	fs->msize = n;
 59 46f79934 2005-01-04 devnull 	return fs;
 60 46f79934 2005-01-04 devnull }
 61 46f79934 2005-01-04 devnull 
 62 46f79934 2005-01-04 devnull CFid*
 63 46f79934 2005-01-04 devnull fsroot(CFsys *fs)
 64 46f79934 2005-01-04 devnull {
 65 46f79934 2005-01-04 devnull 	/* N.B. no incref */
 66 46f79934 2005-01-04 devnull 	return fs->root;
 67 46f79934 2005-01-04 devnull }
 68 46f79934 2005-01-04 devnull 
 69 46f79934 2005-01-04 devnull CFsys*
 70 46f79934 2005-01-04 devnull fsmount(int fd, char *aname)
 71 46f79934 2005-01-04 devnull {
 72 46f79934 2005-01-04 devnull 	CFsys *fs;
 73 46f79934 2005-01-04 devnull 	CFid *fid;
 74 46f79934 2005-01-04 devnull 
 75 46f79934 2005-01-04 devnull 	fs = fsinit(fd);
 76 46f79934 2005-01-04 devnull 	if(fs == nil)
 77 46f79934 2005-01-04 devnull 		return nil;
 78 46f79934 2005-01-04 devnull 
 79 59518849 2005-02-11 devnull 	if((fid = fsattach(fs, nil, getuser(), aname)) == nil){
 80 59518849 2005-02-11 devnull 		_fsunmount(fs);
 81 59518849 2005-02-11 devnull 		return nil;
 82 59518849 2005-02-11 devnull 	}
 83 46f79934 2005-01-04 devnull 	fssetroot(fs, fid);
 84 46f79934 2005-01-04 devnull 	return fs;
 85 59518849 2005-02-11 devnull }
 86 59518849 2005-02-11 devnull 
 87 59518849 2005-02-11 devnull void
 88 59518849 2005-02-11 devnull _fsunmount(CFsys *fs)
 89 59518849 2005-02-11 devnull {
 90 59518849 2005-02-11 devnull 	fs->fd = -1;
 91 59518849 2005-02-11 devnull 	fsunmount(fs);
 92 46f79934 2005-01-04 devnull }
 93 46f79934 2005-01-04 devnull 
 94 46f79934 2005-01-04 devnull void
 95 46f79934 2005-01-04 devnull fsunmount(CFsys *fs)
 96 46f79934 2005-01-04 devnull {
 97 46f79934 2005-01-04 devnull 	fsclose(fs->root);
 98 46f79934 2005-01-04 devnull 	fs->root = nil;
 99 46f79934 2005-01-04 devnull 	_fsdecref(fs);
100 46f79934 2005-01-04 devnull }
101 46f79934 2005-01-04 devnull 
102 46f79934 2005-01-04 devnull void
103 46f79934 2005-01-04 devnull _fsdecref(CFsys *fs)
104 46f79934 2005-01-04 devnull {
105 46f79934 2005-01-04 devnull 	CFid *f, **l, *next;
106 46f79934 2005-01-04 devnull 
107 46f79934 2005-01-04 devnull 	qlock(&fs->lk);
108 46f79934 2005-01-04 devnull 	--fs->ref;
109 cbeb0b26 2006-04-01 devnull 	/*fprint(2, "fsdecref %p to %d\n", fs, fs->ref); */
110 46f79934 2005-01-04 devnull 	if(fs->ref == 0){
111 6135dd69 2005-01-19 devnull 		if(fs->fd >= 0)
112 6135dd69 2005-01-19 devnull 			close(fs->fd);
113 46f79934 2005-01-04 devnull 		/* trim the list down to just the first in each chunk */
114 46f79934 2005-01-04 devnull 		for(l=&fs->freefid; *l; ){
115 46f79934 2005-01-04 devnull 			if((*l)->fid%CFidchunk == 0)
116 46f79934 2005-01-04 devnull 				l = &(*l)->next;
117 46f79934 2005-01-04 devnull 			else
118 46f79934 2005-01-04 devnull 				*l = (*l)->next;
119 46f79934 2005-01-04 devnull 		}
120 46f79934 2005-01-04 devnull 		/* now free the list */
121 46f79934 2005-01-04 devnull 		for(f=fs->freefid; f; f=next){
122 46f79934 2005-01-04 devnull 			next = f->next;
123 46f79934 2005-01-04 devnull 			free(f);
124 46f79934 2005-01-04 devnull 		}
125 46f79934 2005-01-04 devnull 		closeioproc(fs->iorecv);
126 46f79934 2005-01-04 devnull 		closeioproc(fs->iosend);
127 46f79934 2005-01-04 devnull 		free(fs);
128 46f79934 2005-01-04 devnull 		return;
129 46f79934 2005-01-04 devnull 	}
130 46f79934 2005-01-04 devnull 	qunlock(&fs->lk);
131 46f79934 2005-01-04 devnull }
132 46f79934 2005-01-04 devnull 
133 46f79934 2005-01-04 devnull int
134 46f79934 2005-01-04 devnull fsversion(CFsys *fs, int msize, char *version, int nversion)
135 46f79934 2005-01-04 devnull {
136 46f79934 2005-01-04 devnull 	void *freep;
137 46f79934 2005-01-04 devnull 	int r, oldmintag, oldmaxtag;
138 46f79934 2005-01-04 devnull 	Fcall tx, rx;
139 46f79934 2005-01-04 devnull 
140 46f79934 2005-01-04 devnull 	tx.tag = 0;
141 46f79934 2005-01-04 devnull 	tx.type = Tversion;
142 46f79934 2005-01-04 devnull 	tx.version = version;
143 46f79934 2005-01-04 devnull 	tx.msize = msize;
144 46f79934 2005-01-04 devnull 
145 46f79934 2005-01-04 devnull 	/*
146 46f79934 2005-01-04 devnull 	 * bit of a clumsy hack -- force libmux to use NOTAG as tag.
147 46f79934 2005-01-04 devnull 	 * version can only be sent when there are no other messages
148 46f79934 2005-01-04 devnull 	 * outstanding on the wire, so this is more reasonable than it looks.
149 46f79934 2005-01-04 devnull 	 */
150 46f79934 2005-01-04 devnull 	oldmintag = fs->mux.mintag;
151 46f79934 2005-01-04 devnull 	oldmaxtag = fs->mux.maxtag;
152 46f79934 2005-01-04 devnull 	fs->mux.mintag = NOTAG;
153 46f79934 2005-01-04 devnull 	fs->mux.maxtag = NOTAG+1;
154 46f79934 2005-01-04 devnull 	r = _fsrpc(fs, &tx, &rx, &freep);
155 46f79934 2005-01-04 devnull 	fs->mux.mintag = oldmintag;
156 46f79934 2005-01-04 devnull 	fs->mux.maxtag = oldmaxtag;
157 2d70c581 2005-07-13 devnull 	if(r < 0){
158 2d70c581 2005-07-13 devnull 		werrstr("fsrpc: %r");
159 46f79934 2005-01-04 devnull 		return -1;
160 2d70c581 2005-07-13 devnull 	}
161 46f79934 2005-01-04 devnull 
162 46f79934 2005-01-04 devnull 	strecpy(version, version+nversion, rx.version);
163 46f79934 2005-01-04 devnull 	free(freep);
164 80ecfd24 2005-02-08 devnull 	fs->msize = rx.msize;
165 46f79934 2005-01-04 devnull 	return rx.msize;
166 46f79934 2005-01-04 devnull }
167 46f79934 2005-01-04 devnull 
168 46f79934 2005-01-04 devnull CFid*
169 46f79934 2005-01-04 devnull fsattach(CFsys *fs, CFid *afid, char *user, char *aname)
170 46f79934 2005-01-04 devnull {
171 46f79934 2005-01-04 devnull 	Fcall tx, rx;
172 46f79934 2005-01-04 devnull 	CFid *fid;
173 46f79934 2005-01-04 devnull 
174 46f79934 2005-01-04 devnull 	if(aname == nil)
175 46f79934 2005-01-04 devnull 		aname = "";
176 46f79934 2005-01-04 devnull 
177 46f79934 2005-01-04 devnull 	if((fid = _fsgetfid(fs)) == nil)
178 46f79934 2005-01-04 devnull 		return nil;
179 46f79934 2005-01-04 devnull 
180 46f79934 2005-01-04 devnull 	tx.tag = 0;
181 46f79934 2005-01-04 devnull 	tx.type = Tattach;
182 46f79934 2005-01-04 devnull 	tx.afid = afid ? afid->fid : NOFID;
183 46f79934 2005-01-04 devnull 	tx.fid = fid->fid;
184 46f79934 2005-01-04 devnull 	tx.uname = user;
185 46f79934 2005-01-04 devnull 	tx.aname = aname;
186 46f79934 2005-01-04 devnull 
187 46f79934 2005-01-04 devnull 	if(_fsrpc(fs, &tx, &rx, 0) < 0){
188 46f79934 2005-01-04 devnull 		_fsputfid(fid);
189 46f79934 2005-01-04 devnull 		return nil;
190 46f79934 2005-01-04 devnull 	}
191 46f79934 2005-01-04 devnull 	fid->qid = rx.qid;
192 46f79934 2005-01-04 devnull 	return fid;
193 46f79934 2005-01-04 devnull }
194 46f79934 2005-01-04 devnull 
195 46f79934 2005-01-04 devnull void
196 46f79934 2005-01-04 devnull fssetroot(CFsys *fs, CFid *fid)
197 46f79934 2005-01-04 devnull {
198 46f79934 2005-01-04 devnull 	if(fs->root)
199 46f79934 2005-01-04 devnull 		_fsputfid(fs->root);
200 46f79934 2005-01-04 devnull 	fs->root = fid;
201 46f79934 2005-01-04 devnull }
202 46f79934 2005-01-04 devnull 
203 46f79934 2005-01-04 devnull int
204 46f79934 2005-01-04 devnull _fsrpc(CFsys *fs, Fcall *tx, Fcall *rx, void **freep)
205 46f79934 2005-01-04 devnull {
206 46f79934 2005-01-04 devnull 	int n, nn;
207 46f79934 2005-01-04 devnull 	void *tpkt, *rpkt;
208 46f79934 2005-01-04 devnull 
209 74dd0321 2010-12-07 rsc 	n = sizeS2M(tx);
210 46f79934 2005-01-04 devnull 	tpkt = malloc(n);
211 46f79934 2005-01-04 devnull 	if(freep)
212 46f79934 2005-01-04 devnull 		*freep = nil;
213 46f79934 2005-01-04 devnull 	if(tpkt == nil)
214 46f79934 2005-01-04 devnull 		return -1;
215 59518849 2005-02-11 devnull 	tx->tag = 0;
216 59518849 2005-02-11 devnull 	if(chatty9pclient)
217 59518849 2005-02-11 devnull 		fprint(2, "<- %F\n", tx);
218 74dd0321 2010-12-07 rsc 	nn = convS2M(tx, tpkt, n);
219 46f79934 2005-01-04 devnull 	if(nn != n){
220 46f79934 2005-01-04 devnull 		free(tpkt);
221 2d70c581 2005-07-13 devnull 		werrstr("lib9pclient: sizeS2M convS2M mismatch");
222 46f79934 2005-01-04 devnull 		fprint(2, "%r\n");
223 46f79934 2005-01-04 devnull 		return -1;
224 46f79934 2005-01-04 devnull 	}
225 46f79934 2005-01-04 devnull 	rpkt = muxrpc(&fs->mux, tpkt);
226 46f79934 2005-01-04 devnull 	free(tpkt);
227 2d70c581 2005-07-13 devnull 	if(rpkt == nil){
228 2d70c581 2005-07-13 devnull 		werrstr("muxrpc: %r");
229 46f79934 2005-01-04 devnull 		return -1;
230 2d70c581 2005-07-13 devnull 	}
231 46f79934 2005-01-04 devnull 	n = GBIT32((uchar*)rpkt);
232 74dd0321 2010-12-07 rsc 	nn = convM2S(rpkt, n, rx);
233 46f79934 2005-01-04 devnull 	if(nn != n){
234 46f79934 2005-01-04 devnull 		free(rpkt);
235 2d70c581 2005-07-13 devnull 		werrstr("lib9pclient: convM2S packet size mismatch %d %d", n, nn);
236 46f79934 2005-01-04 devnull 		fprint(2, "%r\n");
237 46f79934 2005-01-04 devnull 		return -1;
238 46f79934 2005-01-04 devnull 	}
239 59518849 2005-02-11 devnull 	if(chatty9pclient)
240 59518849 2005-02-11 devnull 		fprint(2, "-> %F\n", rx);
241 46f79934 2005-01-04 devnull 	if(rx->type == Rerror){
242 46f79934 2005-01-04 devnull 		werrstr("%s", rx->ename);
243 46f79934 2005-01-04 devnull 		free(rpkt);
244 46f79934 2005-01-04 devnull 		return -1;
245 46f79934 2005-01-04 devnull 	}
246 46f79934 2005-01-04 devnull 	if(rx->type != tx->type+1){
247 46f79934 2005-01-04 devnull 		werrstr("packet type mismatch -- tx %d rx %d",
248 46f79934 2005-01-04 devnull 			tx->type, rx->type);
249 46f79934 2005-01-04 devnull 		free(rpkt);
250 46f79934 2005-01-04 devnull 		return -1;
251 46f79934 2005-01-04 devnull 	}
252 46f79934 2005-01-04 devnull 	if(freep)
253 46f79934 2005-01-04 devnull 		*freep = rpkt;
254 46f79934 2005-01-04 devnull 	else
255 46f79934 2005-01-04 devnull 		free(rpkt);
256 46f79934 2005-01-04 devnull 	return 0;
257 46f79934 2005-01-04 devnull }
258 46f79934 2005-01-04 devnull 
259 46f79934 2005-01-04 devnull CFid*
260 46f79934 2005-01-04 devnull _fsgetfid(CFsys *fs)
261 46f79934 2005-01-04 devnull {
262 46f79934 2005-01-04 devnull 	int i;
263 46f79934 2005-01-04 devnull 	CFid *f;
264 46f79934 2005-01-04 devnull 
265 46f79934 2005-01-04 devnull 	qlock(&fs->lk);
266 46f79934 2005-01-04 devnull 	if(fs->freefid == nil){
267 46f79934 2005-01-04 devnull 		f = mallocz(sizeof(CFid)*CFidchunk, 1);
268 46f79934 2005-01-04 devnull 		if(f == nil){
269 46f79934 2005-01-04 devnull 			qunlock(&fs->lk);
270 46f79934 2005-01-04 devnull 			return nil;
271 46f79934 2005-01-04 devnull 		}
272 46f79934 2005-01-04 devnull 		for(i=0; i<CFidchunk; i++){
273 46f79934 2005-01-04 devnull 			f[i].fid = fs->nextfid++;
274 46f79934 2005-01-04 devnull 			f[i].next = &f[i+1];
275 46f79934 2005-01-04 devnull 			f[i].fs = fs;
276 46f79934 2005-01-04 devnull 		}
277 46f79934 2005-01-04 devnull 		f[i-1].next = nil;
278 46f79934 2005-01-04 devnull 		fs->freefid = f;
279 46f79934 2005-01-04 devnull 	}
280 46f79934 2005-01-04 devnull 	f = fs->freefid;
281 46f79934 2005-01-04 devnull 	fs->freefid = f->next;
282 46f79934 2005-01-04 devnull 	fs->ref++;
283 46f79934 2005-01-04 devnull 	qunlock(&fs->lk);
284 33baa59e 2005-01-28 devnull 	f->offset = 0;
285 33baa59e 2005-01-28 devnull 	f->mode = -1;
286 33baa59e 2005-01-28 devnull 	f->qid.path = 0;
287 33baa59e 2005-01-28 devnull 	f->qid.vers = 0;
288 33baa59e 2005-01-28 devnull 	f->qid.type = 0;
289 46f79934 2005-01-04 devnull 	return f;
290 46f79934 2005-01-04 devnull }
291 46f79934 2005-01-04 devnull 
292 46f79934 2005-01-04 devnull void
293 46f79934 2005-01-04 devnull _fsputfid(CFid *f)
294 46f79934 2005-01-04 devnull {
295 46f79934 2005-01-04 devnull 	CFsys *fs;
296 46f79934 2005-01-04 devnull 
297 46f79934 2005-01-04 devnull 	fs = f->fs;
298 46f79934 2005-01-04 devnull 	qlock(&fs->lk);
299 46f79934 2005-01-04 devnull 	f->next = fs->freefid;
300 46f79934 2005-01-04 devnull 	fs->freefid = f;
301 46f79934 2005-01-04 devnull 	qunlock(&fs->lk);
302 46f79934 2005-01-04 devnull 	_fsdecref(fs);
303 46f79934 2005-01-04 devnull }
304 46f79934 2005-01-04 devnull 
305 46f79934 2005-01-04 devnull static int
306 46f79934 2005-01-04 devnull _fsgettag(Mux *mux, void *pkt)
307 46f79934 2005-01-04 devnull {
308 46f79934 2005-01-04 devnull 	return GBIT16((uchar*)pkt+5);
309 46f79934 2005-01-04 devnull }
310 46f79934 2005-01-04 devnull 
311 46f79934 2005-01-04 devnull static int
312 46f79934 2005-01-04 devnull _fssettag(Mux *mux, void *pkt, uint tag)
313 46f79934 2005-01-04 devnull {
314 46f79934 2005-01-04 devnull 	PBIT16((uchar*)pkt+5, tag);
315 46f79934 2005-01-04 devnull 	return 0;
316 46f79934 2005-01-04 devnull }
317 46f79934 2005-01-04 devnull 
318 46f79934 2005-01-04 devnull static int
319 46f79934 2005-01-04 devnull _fssend(Mux *mux, void *pkt)
320 46f79934 2005-01-04 devnull {
321 46f79934 2005-01-04 devnull 	CFsys *fs;
322 73a5509a 2006-07-23 devnull 	int n;
323 46f79934 2005-01-04 devnull 
324 46f79934 2005-01-04 devnull 	fs = mux->aux;
325 73a5509a 2006-07-23 devnull 	n = iowrite(fs->iosend, fs->fd, pkt, GBIT32((uchar*)pkt));
326 73a5509a 2006-07-23 devnull 	if(n < 0 && eofkill9pclient)
327 73a5509a 2006-07-23 devnull 		threadexitsall(nil);
328 73a5509a 2006-07-23 devnull 	return n;
329 46f79934 2005-01-04 devnull }
330 46f79934 2005-01-04 devnull 
331 46f79934 2005-01-04 devnull static void*
332 46f79934 2005-01-04 devnull _fsrecv(Mux *mux)
333 46f79934 2005-01-04 devnull {
334 46f79934 2005-01-04 devnull 	uchar *pkt;
335 46f79934 2005-01-04 devnull 	uchar buf[4];
336 46f79934 2005-01-04 devnull 	int n, nfd;
337 46f79934 2005-01-04 devnull 	CFsys *fs;
338 46f79934 2005-01-04 devnull 
339 46f79934 2005-01-04 devnull 	fs = mux->aux;
340 46f79934 2005-01-04 devnull 	n = ioreadn(fs->iorecv, fs->fd, buf, 4);
341 73a5509a 2006-07-23 devnull 	if(n != 4){
342 73a5509a 2006-07-23 devnull 		if(eofkill9pclient)
343 73a5509a 2006-07-23 devnull 			threadexitsall(nil);
344 46f79934 2005-01-04 devnull 		return nil;
345 73a5509a 2006-07-23 devnull 	}
346 46f79934 2005-01-04 devnull 	n = GBIT32(buf);
347 46f79934 2005-01-04 devnull 	pkt = malloc(n+4);
348 46f79934 2005-01-04 devnull 	if(pkt == nil){
349 2d70c581 2005-07-13 devnull 		fprint(2, "lib9pclient out of memory reading 9p packet; here comes trouble\n");
350 46f79934 2005-01-04 devnull 		return nil;
351 46f79934 2005-01-04 devnull 	}
352 46f79934 2005-01-04 devnull 	PBIT32(pkt, n);
353 46f79934 2005-01-04 devnull 	if(ioreadn(fs->iorecv, fs->fd, pkt+4, n-4) != n-4){
354 46f79934 2005-01-04 devnull 		free(pkt);
355 46f79934 2005-01-04 devnull 		return nil;
356 46f79934 2005-01-04 devnull 	}
357 46f79934 2005-01-04 devnull 	if(pkt[4] == Ropenfd){
358 46f79934 2005-01-04 devnull 		if((nfd=iorecvfd(fs->iorecv, fs->fd)) < 0){
359 46f79934 2005-01-04 devnull 			fprint(2, "recv fd error: %r\n");
360 46f79934 2005-01-04 devnull 			free(pkt);
361 46f79934 2005-01-04 devnull 			return nil;
362 46f79934 2005-01-04 devnull 		}
363 46f79934 2005-01-04 devnull 		PBIT32(pkt+n-4, nfd);
364 46f79934 2005-01-04 devnull 	}
365 46f79934 2005-01-04 devnull 	return pkt;
366 46f79934 2005-01-04 devnull }
367 73a5509a 2006-07-23 devnull 
368 73a5509a 2006-07-23 devnull Qid
369 73a5509a 2006-07-23 devnull fsqid(CFid *fid)
370 73a5509a 2006-07-23 devnull {
371 73a5509a 2006-07-23 devnull 	return fid->qid;
372 73a5509a 2006-07-23 devnull }