2 5551e51d 2006-07-23 devnull * 9P to FUSE translator. Acts as FUSE server, 9P client.
3 5551e51d 2006-07-23 devnull * Mounts 9P servers via FUSE kernel module.
5 5551e51d 2006-07-23 devnull * There are four procs in this threaded program
6 5551e51d 2006-07-23 devnull * (ignoring the one that runs main and then exits).
7 5551e51d 2006-07-23 devnull * The first proc reads FUSE requests from /dev/fuse.
8 5551e51d 2006-07-23 devnull * It sends the requests over a channel to a second proc,
9 5551e51d 2006-07-23 devnull * which serves the requests. Each request runs in a
10 5551e51d 2006-07-23 devnull * thread in that second proc. Those threads do write
11 5551e51d 2006-07-23 devnull * FUSE replies, which in theory might block, but in practice don't.
12 5551e51d 2006-07-23 devnull * The 9P interactions are handled by lib9pclient, which
13 5551e51d 2006-07-23 devnull * allocates two more procs, one for reading and one for
14 5551e51d 2006-07-23 devnull * writing the 9P connection. Thus the many threads in the
15 5551e51d 2006-07-23 devnull * request proc can do 9P interactions without blocking.
18 05f50fe6 2006-07-23 devnull #define _GNU_SOURCE 1 /* for O_DIRECTORY on Linux */
19 5551e51d 2006-07-23 devnull #include "a.h"
21 05f50fe6 2006-07-23 devnull /* GNUisms */
22 05f50fe6 2006-07-23 devnull #ifndef O_DIRECTORY
23 05f50fe6 2006-07-23 devnull #define O_DIRECTORY 0
25 05f50fe6 2006-07-23 devnull #ifndef O_LARGEFILE
26 9c15a456 2006-07-27 devnull #if defined(__linux__)
27 9c15a456 2006-07-27 devnull #define O_LARGEFILE 0100000 /* Sigh */
29 05f50fe6 2006-07-23 devnull #define O_LARGEFILE 0
34 5551e51d 2006-07-23 devnull int debug;
35 5551e51d 2006-07-23 devnull char *argv0;
36 5551e51d 2006-07-23 devnull void fusedispatch(void*);
37 5551e51d 2006-07-23 devnull Channel *fusechan;
41 5551e51d 2006-07-23 devnull STACK = 8192
45 5551e51d 2006-07-23 devnull * The number of seconds that the kernel can cache
46 5551e51d 2006-07-23 devnull * returned file attributes. FUSE's default is 1.0.
47 5551e51d 2006-07-23 devnull * I haven't experimented with using 0.
49 5551e51d 2006-07-23 devnull double attrtimeout = 1.0;
52 5551e51d 2006-07-23 devnull * The number of seconds that the kernel can cache
53 5551e51d 2006-07-23 devnull * the returned entry nodeids returned by lookup.
54 5551e51d 2006-07-23 devnull * I haven't experimented with other values.
56 5551e51d 2006-07-23 devnull double entrytimeout = 1.0;
58 5551e51d 2006-07-23 devnull CFsys *fsys;
59 5551e51d 2006-07-23 devnull CFid *fsysroot;
60 5551e51d 2006-07-23 devnull void init9p(char*);
63 5551e51d 2006-07-23 devnull usage(void)
65 5551e51d 2006-07-23 devnull fprint(2, "usage: 9pfuse [-D] [-a attrtimeout] address mtpt\n");
69 5551e51d 2006-07-23 devnull void fusereader(void*);
72 5551e51d 2006-07-23 devnull threadmain(int argc, char **argv)
74 5551e51d 2006-07-23 devnull ARGBEGIN{
75 5551e51d 2006-07-23 devnull case 'D':
76 5551e51d 2006-07-23 devnull chatty9pclient++;
79 5551e51d 2006-07-23 devnull case 'a':
80 5551e51d 2006-07-23 devnull attrtimeout = atof(EARGF(usage()));
86 5551e51d 2006-07-23 devnull if(argc != 2)
89 5551e51d 2006-07-23 devnull quotefmtinstall();
90 5551e51d 2006-07-23 devnull fmtinstall('F', fcallfmt);
91 5551e51d 2006-07-23 devnull fmtinstall('M', dirmodefmt);
92 5551e51d 2006-07-23 devnull fmtinstall('G', fusefmt);
94 a695bc7d 2006-07-23 devnull setsid(); /* won't be able to use console, but can't be interrupted */
96 5551e51d 2006-07-23 devnull init9p(argv[0]);
97 5551e51d 2006-07-23 devnull initfuse(argv[1]);
99 5551e51d 2006-07-23 devnull fusechan = chancreate(sizeof(void*), 0);
100 5551e51d 2006-07-23 devnull proccreate(fusedispatch, nil, STACK);
101 5551e51d 2006-07-23 devnull sendp(fusechan, nil); /* sync */
103 5551e51d 2006-07-23 devnull proccreate(fusereader, nil, STACK);
105 a83ccf38 2006-07-27 devnull * Now that we're serving FUSE, we can wait
106 a83ccf38 2006-07-27 devnull * for the mount to finish and exit back to the user.
108 a83ccf38 2006-07-27 devnull waitfuse();
109 5551e51d 2006-07-23 devnull threadexits(0);
113 5551e51d 2006-07-23 devnull fusereader(void *v)
115 5551e51d 2006-07-23 devnull FuseMsg *m;
117 5551e51d 2006-07-23 devnull while((m = readfusemsg()) != nil)
118 5551e51d 2006-07-23 devnull sendp(fusechan, m);
120 5551e51d 2006-07-23 devnull fusemtpt = nil; /* no need to unmount */
121 5551e51d 2006-07-23 devnull threadexitsall(0);
125 5551e51d 2006-07-23 devnull init9p(char *addr)
129 5551e51d 2006-07-23 devnull if((fd = dial(netmkaddr(addr, "tcp", "564"), nil, nil, nil)) < 0)
130 5551e51d 2006-07-23 devnull sysfatal("dial %s: %r", addr);
131 5551e51d 2006-07-23 devnull if((fsys = fsmount(fd, "")) == nil)
132 5551e51d 2006-07-23 devnull sysfatal("fsmount: %r");
133 5551e51d 2006-07-23 devnull fsysroot = fsroot(fsys);
137 5551e51d 2006-07-23 devnull * FUSE uses nodeids to refer to active "struct inodes"
138 5551e51d 2006-07-23 devnull * (9P's unopened fids). FUSE uses fhs to refer to active
139 5551e51d 2006-07-23 devnull * "struct fuse_files" (9P's opened fids). The choice of
140 5551e51d 2006-07-23 devnull * numbers is up to us except that nodeid 1 is the root directory.
141 5551e51d 2006-07-23 devnull * We use the same number space for both and call the
142 5551e51d 2006-07-23 devnull * bookkeeping structure a FuseFid.
144 5551e51d 2006-07-23 devnull * FUSE requires nodeids to have associated generation
145 5551e51d 2006-07-23 devnull * numbers. If we reuse a nodeid, we have to bump the
146 5551e51d 2006-07-23 devnull * generation number to guarantee that the nodeid,gen
147 5551e51d 2006-07-23 devnull * combination is never reused.
149 5551e51d 2006-07-23 devnull * There are also inode numbers returned in directory reads
150 5551e51d 2006-07-23 devnull * and file attributes, but these do NOT need to match the nodeids.
151 5551e51d 2006-07-23 devnull * We use a combination of qid.path and qid.type as the inode
152 5551e51d 2006-07-23 devnull * number.
155 5551e51d 2006-07-23 devnull * TO DO: reference count the fids.
157 5551e51d 2006-07-23 devnull typedef struct Fusefid Fusefid;
158 5551e51d 2006-07-23 devnull struct Fusefid
160 5551e51d 2006-07-23 devnull Fusefid *next;
161 5551e51d 2006-07-23 devnull CFid *fid;
162 5551e51d 2006-07-23 devnull int ref;
164 5551e51d 2006-07-23 devnull int gen;
165 5551e51d 2006-07-23 devnull int isnodeid;
167 5551e51d 2006-07-23 devnull /* directory read state */
168 5551e51d 2006-07-23 devnull Dir *d0;
171 5551e51d 2006-07-23 devnull int off;
174 5551e51d 2006-07-23 devnull Fusefid **fusefid;
175 5551e51d 2006-07-23 devnull int nfusefid;
176 5551e51d 2006-07-23 devnull Fusefid *freefusefidlist;
178 5551e51d 2006-07-23 devnull Fusefid*
179 5551e51d 2006-07-23 devnull allocfusefid(void)
181 5551e51d 2006-07-23 devnull Fusefid *f;
183 5551e51d 2006-07-23 devnull if((f = freefusefidlist) == nil){
184 5551e51d 2006-07-23 devnull f = emalloc(sizeof *f);
185 5551e51d 2006-07-23 devnull fusefid = erealloc(fusefid, (nfusefid+1)*sizeof *fusefid);
186 5551e51d 2006-07-23 devnull f->id = nfusefid;
187 5551e51d 2006-07-23 devnull fusefid[f->id] = f;
188 5551e51d 2006-07-23 devnull nfusefid++;
190 5551e51d 2006-07-23 devnull freefusefidlist = f->next;
191 5551e51d 2006-07-23 devnull f->next = nil;
192 5551e51d 2006-07-23 devnull f->ref = 1;
193 5551e51d 2006-07-23 devnull f->isnodeid = -1;
194 5551e51d 2006-07-23 devnull return f;
198 5551e51d 2006-07-23 devnull freefusefid(Fusefid *f)
200 5551e51d 2006-07-23 devnull if(--f->ref > 0)
202 5551e51d 2006-07-23 devnull assert(f->ref == 0);
203 5551e51d 2006-07-23 devnull if(f->fid)
204 5551e51d 2006-07-23 devnull fsclose(f->fid);
205 5551e51d 2006-07-23 devnull if(f->d0)
206 5551e51d 2006-07-23 devnull free(f->d0);
207 5551e51d 2006-07-23 devnull f->off = 0;
208 5551e51d 2006-07-23 devnull f->d0 = nil;
209 5551e51d 2006-07-23 devnull f->fid = nil;
210 5551e51d 2006-07-23 devnull f->d = nil;
211 5551e51d 2006-07-23 devnull f->nd = 0;
212 5551e51d 2006-07-23 devnull f->next = freefusefidlist;
213 5551e51d 2006-07-23 devnull f->isnodeid = -1;
214 5551e51d 2006-07-23 devnull freefusefidlist = f;
218 5551e51d 2006-07-23 devnull _alloc(CFid *fid, int isnodeid)
220 5551e51d 2006-07-23 devnull Fusefid *ff;
222 5551e51d 2006-07-23 devnull ff = allocfusefid();
223 5551e51d 2006-07-23 devnull ff->fid = fid;
224 5551e51d 2006-07-23 devnull ff->isnodeid = isnodeid;
225 5551e51d 2006-07-23 devnull ff->gen++;
226 5551e51d 2006-07-23 devnull return ff->id+2; /* skip 0 and 1 */
230 5551e51d 2006-07-23 devnull allocfh(CFid *fid)
232 5551e51d 2006-07-23 devnull return _alloc(fid, 0);
235 5551e51d 2006-07-23 devnull allocnodeid(CFid *fid)
237 5551e51d 2006-07-23 devnull return _alloc(fid, 1);
240 5551e51d 2006-07-23 devnull Fusefid*
241 5551e51d 2006-07-23 devnull lookupfusefid(uvlong id, int isnodeid)
243 5551e51d 2006-07-23 devnull Fusefid *ff;
244 5551e51d 2006-07-23 devnull if(id < 2 || id >= nfusefid+2)
245 5551e51d 2006-07-23 devnull return nil;
246 5551e51d 2006-07-23 devnull ff = fusefid[(int)id-2];
247 5551e51d 2006-07-23 devnull if(ff->isnodeid != isnodeid)
248 5551e51d 2006-07-23 devnull return nil;
249 5551e51d 2006-07-23 devnull return ff;
253 5551e51d 2006-07-23 devnull _lookupcfid(uvlong id, int isnodeid)
255 5551e51d 2006-07-23 devnull Fusefid *ff;
257 5551e51d 2006-07-23 devnull if((ff = lookupfusefid(id, isnodeid)) == nil)
258 5551e51d 2006-07-23 devnull return nil;
259 5551e51d 2006-07-23 devnull return ff->fid;
263 5551e51d 2006-07-23 devnull fh2fid(uvlong fh)
265 5551e51d 2006-07-23 devnull return _lookupcfid(fh, 0);
269 5551e51d 2006-07-23 devnull nodeid2fid(uvlong nodeid)
271 5551e51d 2006-07-23 devnull if(nodeid == 1)
272 5551e51d 2006-07-23 devnull return fsysroot;
273 5551e51d 2006-07-23 devnull return _lookupcfid(nodeid, 1);
277 5551e51d 2006-07-23 devnull qid2inode(Qid q)
279 5551e51d 2006-07-23 devnull return q.path | ((uvlong)q.type<<56);
283 5551e51d 2006-07-23 devnull dir2attr(Dir *d, struct fuse_attr *attr)
285 5551e51d 2006-07-23 devnull attr->ino = qid2inode(d->qid);
286 5551e51d 2006-07-23 devnull attr->size = d->length;
287 5551e51d 2006-07-23 devnull attr->blocks = (d->length+8191)/8192;
288 5551e51d 2006-07-23 devnull attr->atime = d->atime;
289 5551e51d 2006-07-23 devnull attr->mtime = d->mtime;
290 5551e51d 2006-07-23 devnull attr->ctime = d->mtime; /* not right */
291 5551e51d 2006-07-23 devnull attr->atimensec = 0;
292 5551e51d 2006-07-23 devnull attr->mtimensec = 0;
293 5551e51d 2006-07-23 devnull attr->ctimensec = 0;
294 5551e51d 2006-07-23 devnull attr->mode = d->mode&0777;
295 5551e51d 2006-07-23 devnull if(d->mode&DMDIR)
296 5551e51d 2006-07-23 devnull attr->mode |= S_IFDIR;
298 5551e51d 2006-07-23 devnull attr->mode |= S_IFREG;
299 5551e51d 2006-07-23 devnull attr->nlink = 1; /* works for directories! - see FUSE FAQ */
300 5551e51d 2006-07-23 devnull attr->uid = getuid();
301 5551e51d 2006-07-23 devnull attr->gid = getgid();
302 5551e51d 2006-07-23 devnull attr->rdev = 0;
306 5551e51d 2006-07-23 devnull f2timeout(double f, __u64 *s, __u32 *ns)
309 5551e51d 2006-07-23 devnull *ns = (f - (int)f)*1e9;
313 5551e51d 2006-07-23 devnull dir2attrout(Dir *d, struct fuse_attr_out *out)
315 5551e51d 2006-07-23 devnull f2timeout(attrtimeout, &out->attr_valid, &out->attr_valid_nsec);
316 5551e51d 2006-07-23 devnull dir2attr(d, &out->attr);
320 5551e51d 2006-07-23 devnull * Lookup. Walk to the name given as the argument.
321 5551e51d 2006-07-23 devnull * The response is a fuse_entry_out giving full stat info.
324 5551e51d 2006-07-23 devnull fuselookup(FuseMsg *m)
326 5551e51d 2006-07-23 devnull char *name;
327 5551e51d 2006-07-23 devnull Fusefid *ff;
328 5551e51d 2006-07-23 devnull CFid *fid, *newfid;
330 5551e51d 2006-07-23 devnull struct fuse_entry_out out;
332 5551e51d 2006-07-23 devnull name = m->tx;
333 5551e51d 2006-07-23 devnull if((fid = nodeid2fid(m->hdr->nodeid)) == nil){
334 5551e51d 2006-07-23 devnull replyfuseerrno(m, ESTALE);
337 5551e51d 2006-07-23 devnull if(strchr(name, '/')){
338 5551e51d 2006-07-23 devnull replyfuseerrno(m, ENOENT);
341 5551e51d 2006-07-23 devnull if((newfid = fswalk(fid, name)) == nil){
342 5551e51d 2006-07-23 devnull replyfuseerrstr(m);
345 5551e51d 2006-07-23 devnull if((d = fsdirfstat(newfid)) == nil){
346 5551e51d 2006-07-23 devnull fsclose(newfid);
347 5551e51d 2006-07-23 devnull replyfuseerrstr(m);
350 5551e51d 2006-07-23 devnull out.nodeid = allocnodeid(newfid);
351 5551e51d 2006-07-23 devnull ff = lookupfusefid(out.nodeid, 1);
352 5551e51d 2006-07-23 devnull out.generation = ff->gen;
353 5551e51d 2006-07-23 devnull f2timeout(attrtimeout, &out.attr_valid, &out.attr_valid_nsec);
354 5551e51d 2006-07-23 devnull f2timeout(entrytimeout, &out.entry_valid, &out.entry_valid_nsec);
355 5551e51d 2006-07-23 devnull dir2attr(d, &out.attr);
356 5551e51d 2006-07-23 devnull free(d);
357 5551e51d 2006-07-23 devnull replyfuse(m, &out, sizeof out);
361 5551e51d 2006-07-23 devnull * Forget. Reference-counted clunk for nodeids.
362 5551e51d 2006-07-23 devnull * Does not send a reply.
363 5551e51d 2006-07-23 devnull * Each lookup response gives the kernel an additional reference
364 5551e51d 2006-07-23 devnull * to the returned nodeid. Forget says "drop this many references
365 5551e51d 2006-07-23 devnull * to this nodeid". Our fuselookup, when presented with the same query,
366 5551e51d 2006-07-23 devnull * does not return the same results (it allocates a new nodeid for each
367 5551e51d 2006-07-23 devnull * call), but if that ever changes, fuseforget already handles the ref
368 5551e51d 2006-07-23 devnull * counts properly.
371 5551e51d 2006-07-23 devnull fuseforget(FuseMsg *m)
373 5551e51d 2006-07-23 devnull struct fuse_forget_in *in;
374 5551e51d 2006-07-23 devnull Fusefid *ff;
376 5551e51d 2006-07-23 devnull in = m->tx;
377 5551e51d 2006-07-23 devnull if((ff = lookupfusefid(m->hdr->nodeid, 1)) == nil)
379 5551e51d 2006-07-23 devnull if(ff->ref > in->nlookup){
380 5551e51d 2006-07-23 devnull ff->ref -= in->nlookup;
383 5551e51d 2006-07-23 devnull if(ff->ref < in->nlookup)
384 5551e51d 2006-07-23 devnull fprint(2, "bad count in forget\n");
385 5551e51d 2006-07-23 devnull ff->ref = 1;
386 5551e51d 2006-07-23 devnull freefusefid(ff);
390 5551e51d 2006-07-23 devnull * Getattr.
391 5551e51d 2006-07-23 devnull * Replies with a fuse_attr_out structure giving the
392 5551e51d 2006-07-23 devnull * attr for the requested nodeid in out.attr.
393 5551e51d 2006-07-23 devnull * Out.attr_valid and out.attr_valid_nsec give
394 5551e51d 2006-07-23 devnull * the amount of time that the attributes can
395 5551e51d 2006-07-23 devnull * be cached.
397 5551e51d 2006-07-23 devnull * Empirically, though, if I run ls -ld on the root
398 5551e51d 2006-07-23 devnull * twice back to back, I still get two getattrs,
399 5551e51d 2006-07-23 devnull * even with a one second attribute timeout!
402 5551e51d 2006-07-23 devnull fusegetattr(FuseMsg *m)
404 5551e51d 2006-07-23 devnull CFid *fid;
405 5551e51d 2006-07-23 devnull struct fuse_attr_out out;
408 5551e51d 2006-07-23 devnull if((fid = nodeid2fid(m->hdr->nodeid)) == nil){
409 5551e51d 2006-07-23 devnull replyfuseerrno(m, ESTALE);
412 5551e51d 2006-07-23 devnull if((d = fsdirfstat(fid)) == nil){
413 5551e51d 2006-07-23 devnull replyfuseerrstr(m);
416 5551e51d 2006-07-23 devnull memset(&out, 0, sizeof out);
417 5551e51d 2006-07-23 devnull dir2attrout(d, &out);
418 5551e51d 2006-07-23 devnull free(d);
419 5551e51d 2006-07-23 devnull replyfuse(m, &out, sizeof out);
423 5551e51d 2006-07-23 devnull * Setattr.
424 5551e51d 2006-07-23 devnull * FUSE treats the many Unix attribute setting routines
425 5551e51d 2006-07-23 devnull * more or less like 9P does, with a single message.
428 5551e51d 2006-07-23 devnull fusesetattr(FuseMsg *m)
430 5551e51d 2006-07-23 devnull CFid *fid, *nfid;
431 5551e51d 2006-07-23 devnull Dir d, *dd;
432 5551e51d 2006-07-23 devnull struct fuse_setattr_in *in;
433 5551e51d 2006-07-23 devnull struct fuse_attr_out out;
435 5551e51d 2006-07-23 devnull in = m->tx;
436 5551e51d 2006-07-23 devnull if(in->valid&FATTR_FH){
437 5551e51d 2006-07-23 devnull if((fid = fh2fid(in->fh)) == nil){
438 5551e51d 2006-07-23 devnull replyfuseerrno(m, ESTALE);
442 5551e51d 2006-07-23 devnull if((fid = nodeid2fid(m->hdr->nodeid)) == nil){
443 5551e51d 2006-07-23 devnull replyfuseerrno(m, ESTALE);
447 5551e51d 2006-07-23 devnull * Special case: Linux issues a size change to
448 5551e51d 2006-07-23 devnull * truncate a file before opening it OTRUNC.
449 5551e51d 2006-07-23 devnull * Synthetic file servers (e.g., plumber) honor
450 5551e51d 2006-07-23 devnull * open(OTRUNC) but not wstat.
452 5551e51d 2006-07-23 devnull if(in->valid == FATTR_SIZE && in->size == 0){
453 5551e51d 2006-07-23 devnull if((nfid = fswalk(fid, nil)) == nil){
454 5551e51d 2006-07-23 devnull replyfuseerrstr(m);
457 5551e51d 2006-07-23 devnull if(fsfopen(nfid, OWRITE|OTRUNC) < 0){
458 5551e51d 2006-07-23 devnull replyfuseerrstr(m);
459 5551e51d 2006-07-23 devnull fsclose(nfid);
462 5551e51d 2006-07-23 devnull fsclose(nfid);
463 5551e51d 2006-07-23 devnull goto stat;
467 5551e51d 2006-07-23 devnull nulldir(&d);
468 5551e51d 2006-07-23 devnull if(in->valid&FATTR_SIZE)
469 5551e51d 2006-07-23 devnull d.length = in->size;
470 5551e51d 2006-07-23 devnull if(in->valid&FATTR_ATIME)
471 5551e51d 2006-07-23 devnull d.atime = in->atime;
472 5551e51d 2006-07-23 devnull if(in->valid&FATTR_MTIME)
473 5551e51d 2006-07-23 devnull d.mtime = in->mtime;
474 5551e51d 2006-07-23 devnull if(in->valid&FATTR_MODE)
475 5551e51d 2006-07-23 devnull d.mode = in->mode;
476 5551e51d 2006-07-23 devnull if((in->valid&FATTR_UID) || (in->valid&FATTR_GID)){
478 5551e51d 2006-07-23 devnull * I can't be bothered with these yet.
480 5551e51d 2006-07-23 devnull replyfuseerrno(m, EPERM);
483 5551e51d 2006-07-23 devnull if(fsdirfwstat(fid, &d) < 0){
484 5551e51d 2006-07-23 devnull replyfuseerrstr(m);
488 5551e51d 2006-07-23 devnull if((dd = fsdirfstat(fid)) == nil){
489 5551e51d 2006-07-23 devnull replyfuseerrstr(m);
492 5551e51d 2006-07-23 devnull memset(&out, 0, sizeof out);
493 5551e51d 2006-07-23 devnull dir2attrout(dd, &out);
494 5551e51d 2006-07-23 devnull free(dd);
495 5551e51d 2006-07-23 devnull replyfuse(m, &out, sizeof out);
499 5551e51d 2006-07-23 devnull _fuseopenfid(uvlong nodeid, int isdir, int openmode, int *err)
501 5551e51d 2006-07-23 devnull CFid *fid, *newfid;
503 5551e51d 2006-07-23 devnull if((fid = nodeid2fid(nodeid)) == nil){
504 5551e51d 2006-07-23 devnull *err = ESTALE;
505 5551e51d 2006-07-23 devnull return nil;
507 5551e51d 2006-07-23 devnull if(isdir && !(fsqid(fid).type&QTDIR)){
508 5551e51d 2006-07-23 devnull *err = ENOTDIR;
509 5551e51d 2006-07-23 devnull return nil;
511 5551e51d 2006-07-23 devnull if(openmode != OREAD && fsqid(fid).type&QTDIR){
512 5551e51d 2006-07-23 devnull *err = EISDIR;
513 5551e51d 2006-07-23 devnull return nil;
516 5551e51d 2006-07-23 devnull /* Clone fid to get one we can open. */
517 5551e51d 2006-07-23 devnull newfid = fswalk(fid, nil);
518 5551e51d 2006-07-23 devnull if(newfid == nil){
519 5551e51d 2006-07-23 devnull *err = errstr2errno();
520 5551e51d 2006-07-23 devnull return nil;
523 5551e51d 2006-07-23 devnull if(fsfopen(newfid, openmode) < 0){
524 5551e51d 2006-07-23 devnull *err = errstr2errno();
525 5551e51d 2006-07-23 devnull fsclose(newfid);
526 5551e51d 2006-07-23 devnull return nil;
529 5551e51d 2006-07-23 devnull return newfid;
533 5551e51d 2006-07-23 devnull * Open & Opendir.
534 5551e51d 2006-07-23 devnull * Argument is a struct fuse_open_in.
535 5551e51d 2006-07-23 devnull * The mode field is ignored (presumably permission bits)
536 5551e51d 2006-07-23 devnull * and flags is the open mode.
537 5551e51d 2006-07-23 devnull * Replies with a struct fuse_open_out.
540 5551e51d 2006-07-23 devnull _fuseopen(FuseMsg *m, int isdir)
542 5551e51d 2006-07-23 devnull struct fuse_open_in *in;
543 5551e51d 2006-07-23 devnull struct fuse_open_out out;
544 5551e51d 2006-07-23 devnull CFid *fid;
545 5551e51d 2006-07-23 devnull int openmode, flags, err;
547 5551e51d 2006-07-23 devnull in = m->tx;
548 5551e51d 2006-07-23 devnull flags = in->flags;
549 5551e51d 2006-07-23 devnull openmode = flags&3;
550 5551e51d 2006-07-23 devnull flags &= ~3;
551 5551e51d 2006-07-23 devnull flags &= ~(O_DIRECTORY|O_NONBLOCK|O_LARGEFILE);
552 0d7fd011 2006-07-23 devnull if(flags & O_TRUNC){
553 0d7fd011 2006-07-23 devnull openmode |= OTRUNC;
554 0d7fd011 2006-07-23 devnull flags &= ~O_TRUNC;
557 0d7fd011 2006-07-23 devnull * Could translate but not standard 9P:
558 0d7fd011 2006-07-23 devnull * O_DIRECT -> ODIRECT
559 0d7fd011 2006-07-23 devnull * O_NONBLOCK -> ONONBLOCK
560 0d7fd011 2006-07-23 devnull * O_APPEND -> OAPPEND
562 5551e51d 2006-07-23 devnull if(flags){
563 5551e51d 2006-07-23 devnull fprint(2, "unexpected open flags %#uo", (uint)in->flags);
564 5551e51d 2006-07-23 devnull replyfuseerrno(m, EACCES);
567 5551e51d 2006-07-23 devnull if((fid = _fuseopenfid(m->hdr->nodeid, isdir, openmode, &err)) == nil){
568 5551e51d 2006-07-23 devnull replyfuseerrno(m, err);
571 5551e51d 2006-07-23 devnull out.fh = allocfh(fid);
572 5551e51d 2006-07-23 devnull out.open_flags = FOPEN_DIRECT_IO; /* no page cache */
573 5551e51d 2006-07-23 devnull replyfuse(m, &out, sizeof out);
577 5551e51d 2006-07-23 devnull fuseopen(FuseMsg *m)
579 5551e51d 2006-07-23 devnull _fuseopen(m, 0);
583 5551e51d 2006-07-23 devnull fuseopendir(FuseMsg *m)
585 5551e51d 2006-07-23 devnull _fuseopen(m, 1);
589 5551e51d 2006-07-23 devnull * Create & Mkdir.
592 5551e51d 2006-07-23 devnull _fusecreate(uvlong nodeid, char *name, int perm, int ismkdir, int omode, struct fuse_entry_out *out, int *err)
594 5551e51d 2006-07-23 devnull CFid *fid, *newfid, *newfid2;
596 5551e51d 2006-07-23 devnull Fusefid *ff;
598 5551e51d 2006-07-23 devnull if((fid = nodeid2fid(nodeid)) == nil){
599 5551e51d 2006-07-23 devnull *err = ESTALE;
600 5551e51d 2006-07-23 devnull return nil;
602 5551e51d 2006-07-23 devnull perm &= 0777;
603 5551e51d 2006-07-23 devnull if(ismkdir)
604 5551e51d 2006-07-23 devnull perm |= DMDIR;
605 5551e51d 2006-07-23 devnull if(ismkdir && omode != OREAD){
606 5551e51d 2006-07-23 devnull *err = EPERM;
607 5551e51d 2006-07-23 devnull return nil;
609 5551e51d 2006-07-23 devnull if((newfid = fswalk(fid, nil)) == nil){
610 5551e51d 2006-07-23 devnull *err = errstr2errno();
611 5551e51d 2006-07-23 devnull return nil;
613 e54f9a4a 2007-05-09 devnull if(fsfcreate(newfid, name, omode, perm) < 0){
614 5551e51d 2006-07-23 devnull *err = errstr2errno();
615 5551e51d 2006-07-23 devnull fsclose(newfid);
616 5551e51d 2006-07-23 devnull return nil;
618 5551e51d 2006-07-23 devnull if((d = fsdirfstat(newfid)) == nil){
619 5551e51d 2006-07-23 devnull *err = errstr2errno();
620 5551e51d 2006-07-23 devnull fsfremove(newfid);
621 5551e51d 2006-07-23 devnull return nil;
624 5551e51d 2006-07-23 devnull * This fid is no good, because it's open.
625 5551e51d 2006-07-23 devnull * We need an unopened fid. Sigh.
627 5551e51d 2006-07-23 devnull if((newfid2 = fswalk(fid, name)) == nil){
628 5551e51d 2006-07-23 devnull *err = errstr2errno();
629 5551e51d 2006-07-23 devnull free(d);
630 5551e51d 2006-07-23 devnull fsfremove(newfid);
631 5551e51d 2006-07-23 devnull return nil;
633 5551e51d 2006-07-23 devnull out->nodeid = allocnodeid(newfid2);
634 5551e51d 2006-07-23 devnull ff = lookupfusefid(out->nodeid, 1);
635 5551e51d 2006-07-23 devnull out->generation = ff->gen;
636 5551e51d 2006-07-23 devnull f2timeout(attrtimeout, &out->attr_valid, &out->attr_valid_nsec);
637 5551e51d 2006-07-23 devnull f2timeout(entrytimeout, &out->entry_valid, &out->entry_valid_nsec);
638 5551e51d 2006-07-23 devnull dir2attr(d, &out->attr);
639 5551e51d 2006-07-23 devnull free(d);
640 5551e51d 2006-07-23 devnull return newfid;
644 5551e51d 2006-07-23 devnull fusemkdir(FuseMsg *m)
646 5551e51d 2006-07-23 devnull struct fuse_mkdir_in *in;
647 5551e51d 2006-07-23 devnull struct fuse_entry_out out;
648 5551e51d 2006-07-23 devnull CFid *fid;
649 5551e51d 2006-07-23 devnull int err;
650 5551e51d 2006-07-23 devnull char *name;
652 5551e51d 2006-07-23 devnull in = m->tx;
653 5551e51d 2006-07-23 devnull name = (char*)(in+1);
654 5551e51d 2006-07-23 devnull if((fid = _fusecreate(m->hdr->nodeid, name, in->mode, 1, OREAD, &out, &err)) == nil){
655 5551e51d 2006-07-23 devnull replyfuseerrno(m, err);
658 5551e51d 2006-07-23 devnull /* Toss the open fid. */
659 5551e51d 2006-07-23 devnull fsclose(fid);
660 5551e51d 2006-07-23 devnull replyfuse(m, &out, sizeof out);
664 5551e51d 2006-07-23 devnull fusecreate(FuseMsg *m)
666 5551e51d 2006-07-23 devnull struct fuse_open_in *in;
667 5551e51d 2006-07-23 devnull struct fuse_create_out out;
668 5551e51d 2006-07-23 devnull CFid *fid;
669 5551e51d 2006-07-23 devnull int err, openmode, flags;
670 5551e51d 2006-07-23 devnull char *name;
672 5551e51d 2006-07-23 devnull in = m->tx;
673 5551e51d 2006-07-23 devnull flags = in->flags;
674 5551e51d 2006-07-23 devnull openmode = in->flags&3;
675 d7158243 2007-05-09 devnull flags &= ~3;
676 5551e51d 2006-07-23 devnull flags &= ~(O_DIRECTORY|O_NONBLOCK|O_LARGEFILE);
677 d7158243 2007-05-09 devnull flags &= ~(O_CREAT|O_TRUNC); /* huh? */
678 5551e51d 2006-07-23 devnull if(flags){
679 5551e51d 2006-07-23 devnull fprint(2, "bad mode %#uo\n", in->flags);
680 5551e51d 2006-07-23 devnull replyfuseerrno(m, EACCES);
683 5551e51d 2006-07-23 devnull name = (char*)(in+1);
684 5551e51d 2006-07-23 devnull if((fid = _fusecreate(m->hdr->nodeid, name, in->mode, 0, openmode, &out.e, &err)) == nil){
685 5551e51d 2006-07-23 devnull replyfuseerrno(m, err);
688 5551e51d 2006-07-23 devnull out.o.fh = allocfh(fid);
689 5551e51d 2006-07-23 devnull out.o.open_flags = FOPEN_DIRECT_IO; /* no page cache */
690 5551e51d 2006-07-23 devnull replyfuse(m, &out, sizeof out);
694 5551e51d 2006-07-23 devnull * Access.
695 5551e51d 2006-07-23 devnull * Lib9pclient implements this just as Plan 9 does,
696 5551e51d 2006-07-23 devnull * by opening the file (or not) and then closing it.
699 5551e51d 2006-07-23 devnull fuseaccess(FuseMsg *m)
701 5551e51d 2006-07-23 devnull struct fuse_access_in *in;
702 5551e51d 2006-07-23 devnull CFid *fid;
703 143cdf57 2006-07-26 devnull int err, omode;
704 5551e51d 2006-07-23 devnull static int a2o[] = {
715 5551e51d 2006-07-23 devnull in = m->tx;
716 5551e51d 2006-07-23 devnull if(in->mask >= nelem(a2o)){
717 5551e51d 2006-07-23 devnull replyfuseerrno(m, EINVAL);
720 143cdf57 2006-07-26 devnull omode = a2o[in->mask];
721 143cdf57 2006-07-26 devnull if((fid = nodeid2fid(m->hdr->nodeid)) == nil){
722 143cdf57 2006-07-26 devnull replyfuseerrno(m, ESTALE);
725 143cdf57 2006-07-26 devnull if(fsqid(fid).type&QTDIR)
726 143cdf57 2006-07-26 devnull omode = OREAD;
727 143cdf57 2006-07-26 devnull if((fid = _fuseopenfid(m->hdr->nodeid, 0, omode, &err)) == nil){
728 5551e51d 2006-07-23 devnull replyfuseerrno(m, err);
731 5551e51d 2006-07-23 devnull fsclose(fid);
732 5551e51d 2006-07-23 devnull replyfuse(m, nil, 0);
736 5551e51d 2006-07-23 devnull * Release.
737 5551e51d 2006-07-23 devnull * Equivalent of clunk for file handles.
738 5551e51d 2006-07-23 devnull * in->flags is the open mode used in Open or Opendir.
741 5551e51d 2006-07-23 devnull fuserelease(FuseMsg *m)
743 5551e51d 2006-07-23 devnull struct fuse_release_in *in;
744 5551e51d 2006-07-23 devnull Fusefid *ff;
746 5551e51d 2006-07-23 devnull in = m->tx;
747 5551e51d 2006-07-23 devnull if((ff = lookupfusefid(in->fh, 0)) != nil)
748 5551e51d 2006-07-23 devnull freefusefid(ff);
750 5551e51d 2006-07-23 devnull fprint(2, "fuserelease: fh not found\n");
751 5551e51d 2006-07-23 devnull replyfuse(m, nil, 0);
755 5551e51d 2006-07-23 devnull fusereleasedir(FuseMsg *m)
757 5551e51d 2006-07-23 devnull fuserelease(m);
762 5551e51d 2006-07-23 devnull * Read from file handle in->fh at offset in->offset for size in->size.
763 5551e51d 2006-07-23 devnull * We truncate size to maxwrite just to keep the buffer reasonable.
766 5551e51d 2006-07-23 devnull fuseread(FuseMsg *m)
769 5551e51d 2006-07-23 devnull uchar *buf;
770 5551e51d 2006-07-23 devnull CFid *fid;
771 5551e51d 2006-07-23 devnull struct fuse_read_in *in;
773 5551e51d 2006-07-23 devnull in = m->tx;
774 5551e51d 2006-07-23 devnull if((fid = fh2fid(in->fh)) == nil){
775 5551e51d 2006-07-23 devnull replyfuseerrno(m, ESTALE);
778 5551e51d 2006-07-23 devnull n = in->size;
779 5551e51d 2006-07-23 devnull if(n > fusemaxwrite)
780 5551e51d 2006-07-23 devnull n = fusemaxwrite;
781 5551e51d 2006-07-23 devnull buf = emalloc(n);
782 cd2bb6ce 2007-05-04 devnull n = fspread(fid, buf, n, in->offset);
783 5551e51d 2006-07-23 devnull if(n < 0){
784 5551e51d 2006-07-23 devnull free(buf);
785 5551e51d 2006-07-23 devnull replyfuseerrstr(m);
787 5551e51d 2006-07-23 devnull replyfuse(m, buf, n);
788 5551e51d 2006-07-23 devnull free(buf);
792 5551e51d 2006-07-23 devnull * Readdir.
793 5551e51d 2006-07-23 devnull * Read from file handle in->fh at offset in->offset for size in->size.
794 5551e51d 2006-07-23 devnull * We truncate size to maxwrite just to keep the buffer reasonable.
795 5551e51d 2006-07-23 devnull * We assume 9P directory read semantics: a read at offset 0 rewinds
796 5551e51d 2006-07-23 devnull * and a read at any other offset starts where we left off.
797 5551e51d 2006-07-23 devnull * If it became necessary, we could implement a crude seek
798 5551e51d 2006-07-23 devnull * or cache the entire list of directory entries.
799 5551e51d 2006-07-23 devnull * Directory entries read from 9P but not yet handed to FUSE
800 5551e51d 2006-07-23 devnull * are stored in m->d,nd,d0.
802 5551e51d 2006-07-23 devnull int canpack(Dir*, uvlong, uchar**, uchar*);
804 5551e51d 2006-07-23 devnull fusereaddir(FuseMsg *m)
806 5551e51d 2006-07-23 devnull struct fuse_read_in *in;
807 5551e51d 2006-07-23 devnull uchar *buf, *p, *ep;
809 5551e51d 2006-07-23 devnull Fusefid *ff;
811 5551e51d 2006-07-23 devnull in = m->tx;
812 5551e51d 2006-07-23 devnull if((ff = lookupfusefid(in->fh, 0)) == nil){
813 5551e51d 2006-07-23 devnull replyfuseerrno(m, ESTALE);
816 5551e51d 2006-07-23 devnull if(in->offset == 0){
817 5551e51d 2006-07-23 devnull fsseek(ff->fid, 0, 0);
818 5551e51d 2006-07-23 devnull free(ff->d0);
819 5551e51d 2006-07-23 devnull ff->d0 = nil;
820 5551e51d 2006-07-23 devnull ff->d = nil;
821 5551e51d 2006-07-23 devnull ff->nd = 0;
823 5551e51d 2006-07-23 devnull n = in->size;
824 5551e51d 2006-07-23 devnull if(n > fusemaxwrite)
825 5551e51d 2006-07-23 devnull n = fusemaxwrite;
826 5551e51d 2006-07-23 devnull buf = emalloc(n);
827 5551e51d 2006-07-23 devnull p = buf;
828 5551e51d 2006-07-23 devnull ep = buf + n;
829 5551e51d 2006-07-23 devnull for(;;){
830 ca6a2d95 2006-08-01 devnull while(ff->nd > 0){
831 ca6a2d95 2006-08-01 devnull if(!canpack(ff->d, ff->off, &p, ep))
832 ca6a2d95 2006-08-01 devnull goto out;
833 5551e51d 2006-07-23 devnull ff->off++;
834 5551e51d 2006-07-23 devnull ff->d++;
835 5551e51d 2006-07-23 devnull ff->nd--;
837 ca6a2d95 2006-08-01 devnull free(ff->d0);
838 ca6a2d95 2006-08-01 devnull ff->d0 = nil;
839 ca6a2d95 2006-08-01 devnull ff->d = nil;
840 ca6a2d95 2006-08-01 devnull if((ff->nd = fsdirread(ff->fid, &ff->d0)) < 0){
841 ca6a2d95 2006-08-01 devnull replyfuseerrstr(m);
842 ca6a2d95 2006-08-01 devnull free(buf);
845 ca6a2d95 2006-08-01 devnull if(ff->nd == 0)
847 ca6a2d95 2006-08-01 devnull ff->d = ff->d0;
850 5551e51d 2006-07-23 devnull replyfuse(m, buf, p - buf);
851 5551e51d 2006-07-23 devnull free(buf);
855 5551e51d 2006-07-23 devnull canpack(Dir *d, uvlong off, uchar **pp, uchar *ep)
857 5551e51d 2006-07-23 devnull uchar *p;
858 5551e51d 2006-07-23 devnull struct fuse_dirent *de;
859 5551e51d 2006-07-23 devnull int pad, size;
861 5551e51d 2006-07-23 devnull p = *pp;
862 5551e51d 2006-07-23 devnull size = FUSE_NAME_OFFSET + strlen(d->name);
863 5551e51d 2006-07-23 devnull pad = 0;
864 5551e51d 2006-07-23 devnull if(size%8)
865 5551e51d 2006-07-23 devnull pad = 8 - size%8;
866 5551e51d 2006-07-23 devnull if(size+pad > ep - p)
867 5551e51d 2006-07-23 devnull return 0;
868 5551e51d 2006-07-23 devnull de = (struct fuse_dirent*)p;
869 5551e51d 2006-07-23 devnull de->ino = qid2inode(d->qid);
870 5551e51d 2006-07-23 devnull de->off = off;
871 5551e51d 2006-07-23 devnull de->namelen = strlen(d->name);
872 5551e51d 2006-07-23 devnull memmove(de->name, d->name, de->namelen);
873 5551e51d 2006-07-23 devnull if(pad > 0)
874 5551e51d 2006-07-23 devnull memset(de->name+de->namelen, 0, pad);
875 5551e51d 2006-07-23 devnull *pp = p+size+pad;
876 5551e51d 2006-07-23 devnull return 1;
880 5551e51d 2006-07-23 devnull * Write.
881 5551e51d 2006-07-23 devnull * Write from file handle in->fh at offset in->offset for size in->size.
882 5551e51d 2006-07-23 devnull * Don't know what in->write_flags means.
884 5551e51d 2006-07-23 devnull * Apparently implementations are allowed to buffer these writes
885 5551e51d 2006-07-23 devnull * and wait until Flush is sent, but FUSE docs say flush may be
886 5551e51d 2006-07-23 devnull * called zero, one, or even more times per close. So better do the
887 5551e51d 2006-07-23 devnull * actual writing here. Also, errors that happen during Flush just
888 5551e51d 2006-07-23 devnull * show up in the close() return status, which no one checks anyway.
891 5551e51d 2006-07-23 devnull fusewrite(FuseMsg *m)
893 5551e51d 2006-07-23 devnull struct fuse_write_in *in;
894 5551e51d 2006-07-23 devnull struct fuse_write_out out;
895 5551e51d 2006-07-23 devnull void *a;
896 5551e51d 2006-07-23 devnull CFid *fid;
899 5551e51d 2006-07-23 devnull in = m->tx;
900 5551e51d 2006-07-23 devnull a = in+1;
901 5551e51d 2006-07-23 devnull if((fid = fh2fid(in->fh)) == nil){
902 5551e51d 2006-07-23 devnull replyfuseerrno(m, ESTALE);
905 5551e51d 2006-07-23 devnull if(in->size > fusemaxwrite){
906 5551e51d 2006-07-23 devnull replyfuseerrno(m, EINVAL);
909 cd2bb6ce 2007-05-04 devnull n = fspwrite(fid, a, in->size, in->offset);
910 5551e51d 2006-07-23 devnull if(n < 0){
911 5551e51d 2006-07-23 devnull replyfuseerrstr(m);
914 5551e51d 2006-07-23 devnull out.size = n;
915 5551e51d 2006-07-23 devnull replyfuse(m, &out, sizeof out);
919 5551e51d 2006-07-23 devnull * Flush. Supposed to flush any buffered writes. Don't use this.
921 5551e51d 2006-07-23 devnull * Flush is a total crock. It gets called on close() of a file descriptor
922 5551e51d 2006-07-23 devnull * associated with this open file. Some open files have multiple file
923 5551e51d 2006-07-23 devnull * descriptors and thus multiple closes of those file descriptors.
924 5551e51d 2006-07-23 devnull * In those cases, Flush is called multiple times. Some open files
925 5551e51d 2006-07-23 devnull * have file descriptors that are closed on process exit instead of
926 5551e51d 2006-07-23 devnull * closed explicitly. For those files, Flush is never called.
927 5551e51d 2006-07-23 devnull * Even more amusing, Flush gets called before close() of read-only
928 5551e51d 2006-07-23 devnull * file descriptors too!
930 5551e51d 2006-07-23 devnull * This is just a bad idea.
933 5551e51d 2006-07-23 devnull fuseflush(FuseMsg *m)
935 5551e51d 2006-07-23 devnull replyfuse(m, nil, 0);
939 5551e51d 2006-07-23 devnull * Unlink & Rmdir.
942 5551e51d 2006-07-23 devnull _fuseremove(FuseMsg *m, int isdir)
944 5551e51d 2006-07-23 devnull char *name;
945 5551e51d 2006-07-23 devnull CFid *fid, *newfid;
947 5551e51d 2006-07-23 devnull name = m->tx;
948 5551e51d 2006-07-23 devnull if((fid = nodeid2fid(m->hdr->nodeid)) == nil){
949 5551e51d 2006-07-23 devnull replyfuseerrno(m, ESTALE);
952 5551e51d 2006-07-23 devnull if(strchr(name, '/')){
953 5551e51d 2006-07-23 devnull replyfuseerrno(m, ENOENT);
956 5551e51d 2006-07-23 devnull if((newfid = fswalk(fid, name)) == nil){
957 5551e51d 2006-07-23 devnull replyfuseerrstr(m);
960 5551e51d 2006-07-23 devnull if(isdir && !(fsqid(newfid).type&QTDIR)){
961 5551e51d 2006-07-23 devnull replyfuseerrno(m, ENOTDIR);
962 5551e51d 2006-07-23 devnull fsclose(newfid);
965 5551e51d 2006-07-23 devnull if(!isdir && (fsqid(newfid).type&QTDIR)){
966 5551e51d 2006-07-23 devnull replyfuseerrno(m, EISDIR);
967 5551e51d 2006-07-23 devnull fsclose(newfid);
970 5551e51d 2006-07-23 devnull if(fsfremove(newfid) < 0){
971 5551e51d 2006-07-23 devnull replyfuseerrstr(m);
974 5551e51d 2006-07-23 devnull replyfuse(m, nil, 0);
978 5551e51d 2006-07-23 devnull fuseunlink(FuseMsg *m)
980 5551e51d 2006-07-23 devnull _fuseremove(m, 0);
984 5551e51d 2006-07-23 devnull fusermdir(FuseMsg *m)
986 5551e51d 2006-07-23 devnull _fuseremove(m, 1);
990 5551e51d 2006-07-23 devnull * Rename.
992 5551e51d 2006-07-23 devnull * FUSE sends the nodeid for the source and destination
993 5551e51d 2006-07-23 devnull * directory and then the before and after names as strings.
994 5551e51d 2006-07-23 devnull * 9P can only do the rename if the source and destination
995 5551e51d 2006-07-23 devnull * are the same. If the same nodeid is used for source and
996 5551e51d 2006-07-23 devnull * destination, we're fine, but if FUSE gives us different nodeids
997 5551e51d 2006-07-23 devnull * that happen to correspond to the same directory, we have
998 5551e51d 2006-07-23 devnull * no way of figuring that out. Let's hope it doesn't happen too often.
1001 5551e51d 2006-07-23 devnull fuserename(FuseMsg *m)
1003 5551e51d 2006-07-23 devnull struct fuse_rename_in *in;
1004 5551e51d 2006-07-23 devnull char *before, *after;
1005 5551e51d 2006-07-23 devnull CFid *fid, *newfid;
1008 5551e51d 2006-07-23 devnull in = m->tx;
1009 5551e51d 2006-07-23 devnull if(in->newdir != m->hdr->nodeid){
1010 5551e51d 2006-07-23 devnull replyfuseerrno(m, EXDEV);
1011 5551e51d 2006-07-23 devnull return;
1013 5551e51d 2006-07-23 devnull before = (char*)(in+1);
1014 5551e51d 2006-07-23 devnull after = before + strlen(before) + 1;
1015 5551e51d 2006-07-23 devnull if((fid = nodeid2fid(m->hdr->nodeid)) == nil){
1016 5551e51d 2006-07-23 devnull replyfuseerrno(m, ESTALE);
1017 5551e51d 2006-07-23 devnull return;
1019 5551e51d 2006-07-23 devnull if(strchr(before, '/') || strchr(after, '/')){
1020 5551e51d 2006-07-23 devnull replyfuseerrno(m, ENOENT);
1021 5551e51d 2006-07-23 devnull return;
1023 5551e51d 2006-07-23 devnull if((newfid = fswalk(fid, before)) == nil){
1024 5551e51d 2006-07-23 devnull replyfuseerrstr(m);
1025 5551e51d 2006-07-23 devnull return;
1027 5551e51d 2006-07-23 devnull nulldir(&d);
1028 5551e51d 2006-07-23 devnull d.name = after;
1029 5551e51d 2006-07-23 devnull if(fsdirfwstat(newfid, &d) < 0){
1030 5551e51d 2006-07-23 devnull replyfuseerrstr(m);
1031 5551e51d 2006-07-23 devnull fsclose(newfid);
1032 5551e51d 2006-07-23 devnull return;
1034 5551e51d 2006-07-23 devnull fsclose(newfid);
1035 5551e51d 2006-07-23 devnull replyfuse(m, nil, 0);
1039 5551e51d 2006-07-23 devnull * Fsync. Commit file info to stable storage.
1040 5551e51d 2006-07-23 devnull * Not sure what in->fsync_flags are.
1043 5551e51d 2006-07-23 devnull fusefsync(FuseMsg *m)
1045 5551e51d 2006-07-23 devnull struct fuse_fsync_in *in;
1046 5551e51d 2006-07-23 devnull CFid *fid;
1049 5551e51d 2006-07-23 devnull in = m->tx;
1050 5551e51d 2006-07-23 devnull if((fid = fh2fid(in->fh)) == nil){
1051 5551e51d 2006-07-23 devnull replyfuseerrno(m, ESTALE);
1052 5551e51d 2006-07-23 devnull return;
1054 5551e51d 2006-07-23 devnull nulldir(&d);
1055 5551e51d 2006-07-23 devnull if(fsdirfwstat(fid, &d) < 0){
1056 5551e51d 2006-07-23 devnull replyfuseerrstr(m);
1057 5551e51d 2006-07-23 devnull return;
1059 5551e51d 2006-07-23 devnull replyfuse(m, nil, 0);
1063 5551e51d 2006-07-23 devnull * Fsyncdir. Commit dir info to stable storage?
1066 5551e51d 2006-07-23 devnull fusefsyncdir(FuseMsg *m)
1068 5551e51d 2006-07-23 devnull fusefsync(m);
1072 5551e51d 2006-07-23 devnull * Statfs. Send back information about file system.
1073 5551e51d 2006-07-23 devnull * Not really worth implementing, except that if we
1074 5551e51d 2006-07-23 devnull * reply with ENOSYS, programs like df print messages like
1075 5551e51d 2006-07-23 devnull * df: `/tmp/z': Function not implemented
1076 5551e51d 2006-07-23 devnull * and that gets annoying. Returning all zeros excludes
1077 5551e51d 2006-07-23 devnull * us from df without appearing to cause any problems.
1080 5551e51d 2006-07-23 devnull fusestatfs(FuseMsg *m)
1082 5551e51d 2006-07-23 devnull struct fuse_statfs_out out;
1084 5551e51d 2006-07-23 devnull memset(&out, 0, sizeof out);
1085 5551e51d 2006-07-23 devnull replyfuse(m, &out, sizeof out);
1088 5551e51d 2006-07-23 devnull void (*fusehandlers[100])(FuseMsg*);
1090 5551e51d 2006-07-23 devnull struct {
1091 5551e51d 2006-07-23 devnull int op;
1092 5551e51d 2006-07-23 devnull void (*fn)(FuseMsg*);
1093 5551e51d 2006-07-23 devnull } fuselist[] = {
1094 5551e51d 2006-07-23 devnull { FUSE_LOOKUP, fuselookup },
1095 5551e51d 2006-07-23 devnull { FUSE_FORGET, fuseforget },
1096 5551e51d 2006-07-23 devnull { FUSE_GETATTR, fusegetattr },
1097 5551e51d 2006-07-23 devnull { FUSE_SETATTR, fusesetattr },
1099 5551e51d 2006-07-23 devnull * FUSE_READLINK, FUSE_SYMLINK, FUSE_MKNOD are unimplemented.
1101 5551e51d 2006-07-23 devnull { FUSE_MKDIR, fusemkdir },
1102 5551e51d 2006-07-23 devnull { FUSE_UNLINK, fuseunlink },
1103 5551e51d 2006-07-23 devnull { FUSE_RMDIR, fusermdir },
1104 5551e51d 2006-07-23 devnull { FUSE_RENAME, fuserename },
1106 5551e51d 2006-07-23 devnull * FUSE_LINK is unimplemented.
1108 5551e51d 2006-07-23 devnull { FUSE_OPEN, fuseopen },
1109 5551e51d 2006-07-23 devnull { FUSE_READ, fuseread },
1110 5551e51d 2006-07-23 devnull { FUSE_WRITE, fusewrite },
1111 5551e51d 2006-07-23 devnull { FUSE_STATFS, fusestatfs },
1112 5551e51d 2006-07-23 devnull { FUSE_RELEASE, fuserelease },
1113 5551e51d 2006-07-23 devnull { FUSE_FSYNC, fusefsync },
1115 5551e51d 2006-07-23 devnull * FUSE_SETXATTR, FUSE_GETXATTR, FUSE_LISTXATTR, and
1116 5551e51d 2006-07-23 devnull * FUSE_REMOVEXATTR are unimplemented.
1117 5551e51d 2006-07-23 devnull * FUSE will stop sending these requests after getting
1118 5551e51d 2006-07-23 devnull * an -ENOSYS reply (see dispatch below).
1120 5551e51d 2006-07-23 devnull { FUSE_FLUSH, fuseflush },
1122 5551e51d 2006-07-23 devnull * FUSE_INIT is handled in initfuse and should not be seen again.
1124 5551e51d 2006-07-23 devnull { FUSE_OPENDIR, fuseopendir },
1125 5551e51d 2006-07-23 devnull { FUSE_READDIR, fusereaddir },
1126 5551e51d 2006-07-23 devnull { FUSE_RELEASEDIR, fusereleasedir },
1127 5551e51d 2006-07-23 devnull { FUSE_FSYNCDIR, fusefsyncdir },
1128 5551e51d 2006-07-23 devnull { FUSE_ACCESS, fuseaccess },
1129 5551e51d 2006-07-23 devnull { FUSE_CREATE, fusecreate },
1133 5551e51d 2006-07-23 devnull fusethread(void *v)
1135 5551e51d 2006-07-23 devnull FuseMsg *m;
1138 5551e51d 2006-07-23 devnull if((uint)m->hdr->opcode >= nelem(fusehandlers)
1139 5551e51d 2006-07-23 devnull || !fusehandlers[m->hdr->opcode]){
1140 5551e51d 2006-07-23 devnull replyfuseerrno(m, ENOSYS);
1141 5551e51d 2006-07-23 devnull return;
1143 5551e51d 2006-07-23 devnull fusehandlers[m->hdr->opcode](m);
1147 5551e51d 2006-07-23 devnull fusedispatch(void *v)
1150 5551e51d 2006-07-23 devnull FuseMsg *m;
1152 5551e51d 2006-07-23 devnull eofkill9pclient = 1; /* threadexitsall on 9P eof */
1153 5551e51d 2006-07-23 devnull atexit(unmountatexit);
1155 5551e51d 2006-07-23 devnull recvp(fusechan); /* sync */
1157 5551e51d 2006-07-23 devnull for(i=0; i<nelem(fuselist); i++){
1158 5551e51d 2006-07-23 devnull if(fuselist[i].op >= nelem(fusehandlers))
1159 5551e51d 2006-07-23 devnull sysfatal("make fusehandlers bigger op=%d", fuselist[i].op);
1160 5551e51d 2006-07-23 devnull fusehandlers[fuselist[i].op] = fuselist[i].fn;
1163 5551e51d 2006-07-23 devnull while((m = recvp(fusechan)) != nil)
1164 5551e51d 2006-07-23 devnull threadcreate(fusethread, m, STACK);
1168 5551e51d 2006-07-23 devnull emalloc(uint n)
1170 5551e51d 2006-07-23 devnull void *p;
1172 5551e51d 2006-07-23 devnull p = malloc(n);
1173 5551e51d 2006-07-23 devnull if(p == nil)
1174 5551e51d 2006-07-23 devnull sysfatal("malloc(%d): %r", n);
1175 5551e51d 2006-07-23 devnull memset(p, 0, n);
1176 5551e51d 2006-07-23 devnull return p;
1180 5551e51d 2006-07-23 devnull erealloc(void *p, uint n)
1182 5551e51d 2006-07-23 devnull p = realloc(p, n);
1183 5551e51d 2006-07-23 devnull if(p == nil)
1184 5551e51d 2006-07-23 devnull sysfatal("realloc(..., %d): %r", n);
1185 5551e51d 2006-07-23 devnull return p;
1189 5551e51d 2006-07-23 devnull estrdup(char *p)
1191 5551e51d 2006-07-23 devnull char *pp;
1192 5551e51d 2006-07-23 devnull pp = strdup(p);
1193 5551e51d 2006-07-23 devnull if(pp == nil)
1194 5551e51d 2006-07-23 devnull sysfatal("strdup(%.20s): %r", p);
1195 5551e51d 2006-07-23 devnull return pp;
