Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * linux/fs/nfs/nfs3proc.c | |
3 | * | |
4 | * Client-side NFSv3 procedures stubs. | |
5 | * | |
6 | * Copyright (C) 1997, Olaf Kirch | |
7 | */ | |
8 | ||
9 | #include <linux/mm.h> | |
10 | #include <linux/utsname.h> | |
11 | #include <linux/errno.h> | |
12 | #include <linux/string.h> | |
13 | #include <linux/sunrpc/clnt.h> | |
14 | #include <linux/nfs.h> | |
15 | #include <linux/nfs3.h> | |
16 | #include <linux/nfs_fs.h> | |
17 | #include <linux/nfs_page.h> | |
18 | #include <linux/lockd/bind.h> | |
19 | #include <linux/smp_lock.h> | |
20 | ||
21 | #define NFSDBG_FACILITY NFSDBG_PROC | |
22 | ||
23 | extern struct rpc_procinfo nfs3_procedures[]; | |
24 | ||
25 | /* A wrapper to handle the EJUKEBOX error message */ | |
26 | static int | |
27 | nfs3_rpc_wrapper(struct rpc_clnt *clnt, struct rpc_message *msg, int flags) | |
28 | { | |
29 | sigset_t oldset; | |
30 | int res; | |
31 | rpc_clnt_sigmask(clnt, &oldset); | |
32 | do { | |
33 | res = rpc_call_sync(clnt, msg, flags); | |
34 | if (res != -EJUKEBOX) | |
35 | break; | |
36 | set_current_state(TASK_INTERRUPTIBLE); | |
37 | schedule_timeout(NFS_JUKEBOX_RETRY_TIME); | |
38 | res = -ERESTARTSYS; | |
39 | } while (!signalled()); | |
40 | rpc_clnt_sigunmask(clnt, &oldset); | |
41 | return res; | |
42 | } | |
43 | ||
44 | static inline int | |
45 | nfs3_rpc_call_wrapper(struct rpc_clnt *clnt, u32 proc, void *argp, void *resp, int flags) | |
46 | { | |
47 | struct rpc_message msg = { | |
48 | .rpc_proc = &nfs3_procedures[proc], | |
49 | .rpc_argp = argp, | |
50 | .rpc_resp = resp, | |
51 | }; | |
52 | return nfs3_rpc_wrapper(clnt, &msg, flags); | |
53 | } | |
54 | ||
55 | #define rpc_call(clnt, proc, argp, resp, flags) \ | |
56 | nfs3_rpc_call_wrapper(clnt, proc, argp, resp, flags) | |
57 | #define rpc_call_sync(clnt, msg, flags) \ | |
58 | nfs3_rpc_wrapper(clnt, msg, flags) | |
59 | ||
60 | static int | |
61 | nfs3_async_handle_jukebox(struct rpc_task *task) | |
62 | { | |
63 | if (task->tk_status != -EJUKEBOX) | |
64 | return 0; | |
65 | task->tk_status = 0; | |
66 | rpc_restart_call(task); | |
67 | rpc_delay(task, NFS_JUKEBOX_RETRY_TIME); | |
68 | return 1; | |
69 | } | |
70 | ||
71 | /* | |
72 | * Bare-bones access to getattr: this is for nfs_read_super. | |
73 | */ | |
74 | static int | |
75 | nfs3_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle, | |
76 | struct nfs_fsinfo *info) | |
77 | { | |
78 | int status; | |
79 | ||
80 | dprintk("%s: call fsinfo\n", __FUNCTION__); | |
81 | info->fattr->valid = 0; | |
82 | status = rpc_call(server->client_sys, NFS3PROC_FSINFO, fhandle, info, 0); | |
83 | dprintk("%s: reply fsinfo: %d\n", __FUNCTION__, status); | |
84 | if (!(info->fattr->valid & NFS_ATTR_FATTR)) { | |
85 | status = rpc_call(server->client_sys, NFS3PROC_GETATTR, fhandle, info->fattr, 0); | |
86 | dprintk("%s: reply getattr: %d\n", __FUNCTION__, status); | |
87 | } | |
88 | return status; | |
89 | } | |
90 | ||
91 | /* | |
92 | * One function for each procedure in the NFS protocol. | |
93 | */ | |
94 | static int | |
95 | nfs3_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, | |
96 | struct nfs_fattr *fattr) | |
97 | { | |
98 | int status; | |
99 | ||
100 | dprintk("NFS call getattr\n"); | |
101 | fattr->valid = 0; | |
102 | status = rpc_call(server->client, NFS3PROC_GETATTR, | |
103 | fhandle, fattr, 0); | |
104 | dprintk("NFS reply getattr: %d\n", status); | |
105 | return status; | |
106 | } | |
107 | ||
108 | static int | |
109 | nfs3_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, | |
110 | struct iattr *sattr) | |
111 | { | |
112 | struct inode *inode = dentry->d_inode; | |
113 | struct nfs3_sattrargs arg = { | |
114 | .fh = NFS_FH(inode), | |
115 | .sattr = sattr, | |
116 | }; | |
117 | int status; | |
118 | ||
119 | dprintk("NFS call setattr\n"); | |
120 | fattr->valid = 0; | |
121 | status = rpc_call(NFS_CLIENT(inode), NFS3PROC_SETATTR, &arg, fattr, 0); | |
122 | dprintk("NFS reply setattr: %d\n", status); | |
123 | return status; | |
124 | } | |
125 | ||
126 | static int | |
127 | nfs3_proc_lookup(struct inode *dir, struct qstr *name, | |
128 | struct nfs_fh *fhandle, struct nfs_fattr *fattr) | |
129 | { | |
130 | struct nfs_fattr dir_attr; | |
131 | struct nfs3_diropargs arg = { | |
132 | .fh = NFS_FH(dir), | |
133 | .name = name->name, | |
134 | .len = name->len | |
135 | }; | |
136 | struct nfs3_diropres res = { | |
137 | .dir_attr = &dir_attr, | |
138 | .fh = fhandle, | |
139 | .fattr = fattr | |
140 | }; | |
141 | int status; | |
142 | ||
143 | dprintk("NFS call lookup %s\n", name->name); | |
144 | dir_attr.valid = 0; | |
145 | fattr->valid = 0; | |
146 | status = rpc_call(NFS_CLIENT(dir), NFS3PROC_LOOKUP, &arg, &res, 0); | |
147 | if (status >= 0 && !(fattr->valid & NFS_ATTR_FATTR)) | |
148 | status = rpc_call(NFS_CLIENT(dir), NFS3PROC_GETATTR, | |
149 | fhandle, fattr, 0); | |
150 | dprintk("NFS reply lookup: %d\n", status); | |
151 | if (status >= 0) | |
152 | status = nfs_refresh_inode(dir, &dir_attr); | |
153 | return status; | |
154 | } | |
155 | ||
156 | static int nfs3_proc_access(struct inode *inode, struct nfs_access_entry *entry) | |
157 | { | |
158 | struct nfs_fattr fattr; | |
159 | struct nfs3_accessargs arg = { | |
160 | .fh = NFS_FH(inode), | |
161 | }; | |
162 | struct nfs3_accessres res = { | |
163 | .fattr = &fattr, | |
164 | }; | |
165 | struct rpc_message msg = { | |
166 | .rpc_proc = &nfs3_procedures[NFS3PROC_ACCESS], | |
167 | .rpc_argp = &arg, | |
168 | .rpc_resp = &res, | |
169 | .rpc_cred = entry->cred | |
170 | }; | |
171 | int mode = entry->mask; | |
172 | int status; | |
173 | ||
174 | dprintk("NFS call access\n"); | |
175 | fattr.valid = 0; | |
176 | ||
177 | if (mode & MAY_READ) | |
178 | arg.access |= NFS3_ACCESS_READ; | |
179 | if (S_ISDIR(inode->i_mode)) { | |
180 | if (mode & MAY_WRITE) | |
181 | arg.access |= NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND | NFS3_ACCESS_DELETE; | |
182 | if (mode & MAY_EXEC) | |
183 | arg.access |= NFS3_ACCESS_LOOKUP; | |
184 | } else { | |
185 | if (mode & MAY_WRITE) | |
186 | arg.access |= NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND; | |
187 | if (mode & MAY_EXEC) | |
188 | arg.access |= NFS3_ACCESS_EXECUTE; | |
189 | } | |
190 | status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); | |
191 | nfs_refresh_inode(inode, &fattr); | |
192 | if (status == 0) { | |
193 | entry->mask = 0; | |
194 | if (res.access & NFS3_ACCESS_READ) | |
195 | entry->mask |= MAY_READ; | |
196 | if (res.access & (NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND | NFS3_ACCESS_DELETE)) | |
197 | entry->mask |= MAY_WRITE; | |
198 | if (res.access & (NFS3_ACCESS_LOOKUP|NFS3_ACCESS_EXECUTE)) | |
199 | entry->mask |= MAY_EXEC; | |
200 | } | |
201 | dprintk("NFS reply access: %d\n", status); | |
202 | return status; | |
203 | } | |
204 | ||
205 | static int nfs3_proc_readlink(struct inode *inode, struct page *page, | |
206 | unsigned int pgbase, unsigned int pglen) | |
207 | { | |
208 | struct nfs_fattr fattr; | |
209 | struct nfs3_readlinkargs args = { | |
210 | .fh = NFS_FH(inode), | |
211 | .pgbase = pgbase, | |
212 | .pglen = pglen, | |
213 | .pages = &page | |
214 | }; | |
215 | int status; | |
216 | ||
217 | dprintk("NFS call readlink\n"); | |
218 | fattr.valid = 0; | |
219 | status = rpc_call(NFS_CLIENT(inode), NFS3PROC_READLINK, | |
220 | &args, &fattr, 0); | |
221 | nfs_refresh_inode(inode, &fattr); | |
222 | dprintk("NFS reply readlink: %d\n", status); | |
223 | return status; | |
224 | } | |
225 | ||
226 | static int nfs3_proc_read(struct nfs_read_data *rdata) | |
227 | { | |
228 | int flags = rdata->flags; | |
229 | struct inode * inode = rdata->inode; | |
230 | struct nfs_fattr * fattr = rdata->res.fattr; | |
231 | struct rpc_message msg = { | |
232 | .rpc_proc = &nfs3_procedures[NFS3PROC_READ], | |
233 | .rpc_argp = &rdata->args, | |
234 | .rpc_resp = &rdata->res, | |
235 | .rpc_cred = rdata->cred, | |
236 | }; | |
237 | int status; | |
238 | ||
239 | dprintk("NFS call read %d @ %Ld\n", rdata->args.count, | |
240 | (long long) rdata->args.offset); | |
241 | fattr->valid = 0; | |
242 | status = rpc_call_sync(NFS_CLIENT(inode), &msg, flags); | |
243 | if (status >= 0) | |
244 | nfs_refresh_inode(inode, fattr); | |
245 | dprintk("NFS reply read: %d\n", status); | |
246 | return status; | |
247 | } | |
248 | ||
249 | static int nfs3_proc_write(struct nfs_write_data *wdata) | |
250 | { | |
251 | int rpcflags = wdata->flags; | |
252 | struct inode * inode = wdata->inode; | |
253 | struct nfs_fattr * fattr = wdata->res.fattr; | |
254 | struct rpc_message msg = { | |
255 | .rpc_proc = &nfs3_procedures[NFS3PROC_WRITE], | |
256 | .rpc_argp = &wdata->args, | |
257 | .rpc_resp = &wdata->res, | |
258 | .rpc_cred = wdata->cred, | |
259 | }; | |
260 | int status; | |
261 | ||
262 | dprintk("NFS call write %d @ %Ld\n", wdata->args.count, | |
263 | (long long) wdata->args.offset); | |
264 | fattr->valid = 0; | |
265 | status = rpc_call_sync(NFS_CLIENT(inode), &msg, rpcflags); | |
266 | if (status >= 0) | |
267 | nfs_refresh_inode(inode, fattr); | |
268 | dprintk("NFS reply write: %d\n", status); | |
269 | return status < 0? status : wdata->res.count; | |
270 | } | |
271 | ||
272 | static int nfs3_proc_commit(struct nfs_write_data *cdata) | |
273 | { | |
274 | struct inode * inode = cdata->inode; | |
275 | struct nfs_fattr * fattr = cdata->res.fattr; | |
276 | struct rpc_message msg = { | |
277 | .rpc_proc = &nfs3_procedures[NFS3PROC_COMMIT], | |
278 | .rpc_argp = &cdata->args, | |
279 | .rpc_resp = &cdata->res, | |
280 | .rpc_cred = cdata->cred, | |
281 | }; | |
282 | int status; | |
283 | ||
284 | dprintk("NFS call commit %d @ %Ld\n", cdata->args.count, | |
285 | (long long) cdata->args.offset); | |
286 | fattr->valid = 0; | |
287 | status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); | |
288 | if (status >= 0) | |
289 | nfs_refresh_inode(inode, fattr); | |
290 | dprintk("NFS reply commit: %d\n", status); | |
291 | return status; | |
292 | } | |
293 | ||
294 | /* | |
295 | * Create a regular file. | |
296 | * For now, we don't implement O_EXCL. | |
297 | */ | |
298 | static int | |
299 | nfs3_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, | |
300 | int flags) | |
301 | { | |
302 | struct nfs_fh fhandle; | |
303 | struct nfs_fattr fattr; | |
304 | struct nfs_fattr dir_attr; | |
305 | struct nfs3_createargs arg = { | |
306 | .fh = NFS_FH(dir), | |
307 | .name = dentry->d_name.name, | |
308 | .len = dentry->d_name.len, | |
309 | .sattr = sattr, | |
310 | }; | |
311 | struct nfs3_diropres res = { | |
312 | .dir_attr = &dir_attr, | |
313 | .fh = &fhandle, | |
314 | .fattr = &fattr | |
315 | }; | |
316 | int status; | |
317 | ||
318 | dprintk("NFS call create %s\n", dentry->d_name.name); | |
319 | arg.createmode = NFS3_CREATE_UNCHECKED; | |
320 | if (flags & O_EXCL) { | |
321 | arg.createmode = NFS3_CREATE_EXCLUSIVE; | |
322 | arg.verifier[0] = jiffies; | |
323 | arg.verifier[1] = current->pid; | |
324 | } | |
325 | ||
326 | again: | |
327 | dir_attr.valid = 0; | |
328 | fattr.valid = 0; | |
329 | status = rpc_call(NFS_CLIENT(dir), NFS3PROC_CREATE, &arg, &res, 0); | |
330 | nfs_refresh_inode(dir, &dir_attr); | |
331 | ||
332 | /* If the server doesn't support the exclusive creation semantics, | |
333 | * try again with simple 'guarded' mode. */ | |
334 | if (status == NFSERR_NOTSUPP) { | |
335 | switch (arg.createmode) { | |
336 | case NFS3_CREATE_EXCLUSIVE: | |
337 | arg.createmode = NFS3_CREATE_GUARDED; | |
338 | break; | |
339 | ||
340 | case NFS3_CREATE_GUARDED: | |
341 | arg.createmode = NFS3_CREATE_UNCHECKED; | |
342 | break; | |
343 | ||
344 | case NFS3_CREATE_UNCHECKED: | |
345 | goto out; | |
346 | } | |
347 | goto again; | |
348 | } | |
349 | ||
350 | if (status == 0) | |
351 | status = nfs_instantiate(dentry, &fhandle, &fattr); | |
352 | if (status != 0) | |
353 | goto out; | |
354 | ||
355 | /* When we created the file with exclusive semantics, make | |
356 | * sure we set the attributes afterwards. */ | |
357 | if (arg.createmode == NFS3_CREATE_EXCLUSIVE) { | |
358 | dprintk("NFS call setattr (post-create)\n"); | |
359 | ||
360 | if (!(sattr->ia_valid & ATTR_ATIME_SET)) | |
361 | sattr->ia_valid |= ATTR_ATIME; | |
362 | if (!(sattr->ia_valid & ATTR_MTIME_SET)) | |
363 | sattr->ia_valid |= ATTR_MTIME; | |
364 | ||
365 | /* Note: we could use a guarded setattr here, but I'm | |
366 | * not sure this buys us anything (and I'd have | |
367 | * to revamp the NFSv3 XDR code) */ | |
368 | status = nfs3_proc_setattr(dentry, &fattr, sattr); | |
369 | nfs_refresh_inode(dentry->d_inode, &fattr); | |
370 | dprintk("NFS reply setattr (post-create): %d\n", status); | |
371 | } | |
372 | out: | |
373 | dprintk("NFS reply create: %d\n", status); | |
374 | return status; | |
375 | } | |
376 | ||
377 | static int | |
378 | nfs3_proc_remove(struct inode *dir, struct qstr *name) | |
379 | { | |
380 | struct nfs_fattr dir_attr; | |
381 | struct nfs3_diropargs arg = { | |
382 | .fh = NFS_FH(dir), | |
383 | .name = name->name, | |
384 | .len = name->len | |
385 | }; | |
386 | struct rpc_message msg = { | |
387 | .rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE], | |
388 | .rpc_argp = &arg, | |
389 | .rpc_resp = &dir_attr, | |
390 | }; | |
391 | int status; | |
392 | ||
393 | dprintk("NFS call remove %s\n", name->name); | |
394 | dir_attr.valid = 0; | |
395 | status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); | |
396 | nfs_refresh_inode(dir, &dir_attr); | |
397 | dprintk("NFS reply remove: %d\n", status); | |
398 | return status; | |
399 | } | |
400 | ||
401 | static int | |
402 | nfs3_proc_unlink_setup(struct rpc_message *msg, struct dentry *dir, struct qstr *name) | |
403 | { | |
404 | struct unlinkxdr { | |
405 | struct nfs3_diropargs arg; | |
406 | struct nfs_fattr res; | |
407 | } *ptr; | |
408 | ||
409 | ptr = (struct unlinkxdr *)kmalloc(sizeof(*ptr), GFP_KERNEL); | |
410 | if (!ptr) | |
411 | return -ENOMEM; | |
412 | ptr->arg.fh = NFS_FH(dir->d_inode); | |
413 | ptr->arg.name = name->name; | |
414 | ptr->arg.len = name->len; | |
415 | ptr->res.valid = 0; | |
416 | msg->rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE]; | |
417 | msg->rpc_argp = &ptr->arg; | |
418 | msg->rpc_resp = &ptr->res; | |
419 | return 0; | |
420 | } | |
421 | ||
422 | static int | |
423 | nfs3_proc_unlink_done(struct dentry *dir, struct rpc_task *task) | |
424 | { | |
425 | struct rpc_message *msg = &task->tk_msg; | |
426 | struct nfs_fattr *dir_attr; | |
427 | ||
428 | if (nfs3_async_handle_jukebox(task)) | |
429 | return 1; | |
430 | if (msg->rpc_argp) { | |
431 | dir_attr = (struct nfs_fattr*)msg->rpc_resp; | |
432 | nfs_refresh_inode(dir->d_inode, dir_attr); | |
433 | kfree(msg->rpc_argp); | |
434 | } | |
435 | return 0; | |
436 | } | |
437 | ||
438 | static int | |
439 | nfs3_proc_rename(struct inode *old_dir, struct qstr *old_name, | |
440 | struct inode *new_dir, struct qstr *new_name) | |
441 | { | |
442 | struct nfs_fattr old_dir_attr, new_dir_attr; | |
443 | struct nfs3_renameargs arg = { | |
444 | .fromfh = NFS_FH(old_dir), | |
445 | .fromname = old_name->name, | |
446 | .fromlen = old_name->len, | |
447 | .tofh = NFS_FH(new_dir), | |
448 | .toname = new_name->name, | |
449 | .tolen = new_name->len | |
450 | }; | |
451 | struct nfs3_renameres res = { | |
452 | .fromattr = &old_dir_attr, | |
453 | .toattr = &new_dir_attr | |
454 | }; | |
455 | int status; | |
456 | ||
457 | dprintk("NFS call rename %s -> %s\n", old_name->name, new_name->name); | |
458 | old_dir_attr.valid = 0; | |
459 | new_dir_attr.valid = 0; | |
460 | status = rpc_call(NFS_CLIENT(old_dir), NFS3PROC_RENAME, &arg, &res, 0); | |
461 | nfs_refresh_inode(old_dir, &old_dir_attr); | |
462 | nfs_refresh_inode(new_dir, &new_dir_attr); | |
463 | dprintk("NFS reply rename: %d\n", status); | |
464 | return status; | |
465 | } | |
466 | ||
467 | static int | |
468 | nfs3_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) | |
469 | { | |
470 | struct nfs_fattr dir_attr, fattr; | |
471 | struct nfs3_linkargs arg = { | |
472 | .fromfh = NFS_FH(inode), | |
473 | .tofh = NFS_FH(dir), | |
474 | .toname = name->name, | |
475 | .tolen = name->len | |
476 | }; | |
477 | struct nfs3_linkres res = { | |
478 | .dir_attr = &dir_attr, | |
479 | .fattr = &fattr | |
480 | }; | |
481 | int status; | |
482 | ||
483 | dprintk("NFS call link %s\n", name->name); | |
484 | dir_attr.valid = 0; | |
485 | fattr.valid = 0; | |
486 | status = rpc_call(NFS_CLIENT(inode), NFS3PROC_LINK, &arg, &res, 0); | |
487 | nfs_refresh_inode(dir, &dir_attr); | |
488 | nfs_refresh_inode(inode, &fattr); | |
489 | dprintk("NFS reply link: %d\n", status); | |
490 | return status; | |
491 | } | |
492 | ||
493 | static int | |
494 | nfs3_proc_symlink(struct inode *dir, struct qstr *name, struct qstr *path, | |
495 | struct iattr *sattr, struct nfs_fh *fhandle, | |
496 | struct nfs_fattr *fattr) | |
497 | { | |
498 | struct nfs_fattr dir_attr; | |
499 | struct nfs3_symlinkargs arg = { | |
500 | .fromfh = NFS_FH(dir), | |
501 | .fromname = name->name, | |
502 | .fromlen = name->len, | |
503 | .topath = path->name, | |
504 | .tolen = path->len, | |
505 | .sattr = sattr | |
506 | }; | |
507 | struct nfs3_diropres res = { | |
508 | .dir_attr = &dir_attr, | |
509 | .fh = fhandle, | |
510 | .fattr = fattr | |
511 | }; | |
512 | int status; | |
513 | ||
514 | if (path->len > NFS3_MAXPATHLEN) | |
515 | return -ENAMETOOLONG; | |
516 | dprintk("NFS call symlink %s -> %s\n", name->name, path->name); | |
517 | dir_attr.valid = 0; | |
518 | fattr->valid = 0; | |
519 | status = rpc_call(NFS_CLIENT(dir), NFS3PROC_SYMLINK, &arg, &res, 0); | |
520 | nfs_refresh_inode(dir, &dir_attr); | |
521 | dprintk("NFS reply symlink: %d\n", status); | |
522 | return status; | |
523 | } | |
524 | ||
525 | static int | |
526 | nfs3_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr) | |
527 | { | |
528 | struct nfs_fh fhandle; | |
529 | struct nfs_fattr fattr, dir_attr; | |
530 | struct nfs3_mkdirargs arg = { | |
531 | .fh = NFS_FH(dir), | |
532 | .name = dentry->d_name.name, | |
533 | .len = dentry->d_name.len, | |
534 | .sattr = sattr | |
535 | }; | |
536 | struct nfs3_diropres res = { | |
537 | .dir_attr = &dir_attr, | |
538 | .fh = &fhandle, | |
539 | .fattr = &fattr | |
540 | }; | |
541 | int status; | |
542 | ||
543 | dprintk("NFS call mkdir %s\n", dentry->d_name.name); | |
544 | dir_attr.valid = 0; | |
545 | fattr.valid = 0; | |
546 | status = rpc_call(NFS_CLIENT(dir), NFS3PROC_MKDIR, &arg, &res, 0); | |
547 | nfs_refresh_inode(dir, &dir_attr); | |
548 | if (status == 0) | |
549 | status = nfs_instantiate(dentry, &fhandle, &fattr); | |
550 | dprintk("NFS reply mkdir: %d\n", status); | |
551 | return status; | |
552 | } | |
553 | ||
554 | static int | |
555 | nfs3_proc_rmdir(struct inode *dir, struct qstr *name) | |
556 | { | |
557 | struct nfs_fattr dir_attr; | |
558 | struct nfs3_diropargs arg = { | |
559 | .fh = NFS_FH(dir), | |
560 | .name = name->name, | |
561 | .len = name->len | |
562 | }; | |
563 | int status; | |
564 | ||
565 | dprintk("NFS call rmdir %s\n", name->name); | |
566 | dir_attr.valid = 0; | |
567 | status = rpc_call(NFS_CLIENT(dir), NFS3PROC_RMDIR, &arg, &dir_attr, 0); | |
568 | nfs_refresh_inode(dir, &dir_attr); | |
569 | dprintk("NFS reply rmdir: %d\n", status); | |
570 | return status; | |
571 | } | |
572 | ||
573 | /* | |
574 | * The READDIR implementation is somewhat hackish - we pass the user buffer | |
575 | * to the encode function, which installs it in the receive iovec. | |
576 | * The decode function itself doesn't perform any decoding, it just makes | |
577 | * sure the reply is syntactically correct. | |
578 | * | |
579 | * Also note that this implementation handles both plain readdir and | |
580 | * readdirplus. | |
581 | */ | |
582 | static int | |
583 | nfs3_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, | |
584 | u64 cookie, struct page *page, unsigned int count, int plus) | |
585 | { | |
586 | struct inode *dir = dentry->d_inode; | |
587 | struct nfs_fattr dir_attr; | |
588 | u32 *verf = NFS_COOKIEVERF(dir); | |
589 | struct nfs3_readdirargs arg = { | |
590 | .fh = NFS_FH(dir), | |
591 | .cookie = cookie, | |
592 | .verf = {verf[0], verf[1]}, | |
593 | .plus = plus, | |
594 | .count = count, | |
595 | .pages = &page | |
596 | }; | |
597 | struct nfs3_readdirres res = { | |
598 | .dir_attr = &dir_attr, | |
599 | .verf = verf, | |
600 | .plus = plus | |
601 | }; | |
602 | struct rpc_message msg = { | |
603 | .rpc_proc = &nfs3_procedures[NFS3PROC_READDIR], | |
604 | .rpc_argp = &arg, | |
605 | .rpc_resp = &res, | |
606 | .rpc_cred = cred | |
607 | }; | |
608 | int status; | |
609 | ||
610 | lock_kernel(); | |
611 | ||
612 | if (plus) | |
613 | msg.rpc_proc = &nfs3_procedures[NFS3PROC_READDIRPLUS]; | |
614 | ||
615 | dprintk("NFS call readdir%s %d\n", | |
616 | plus? "plus" : "", (unsigned int) cookie); | |
617 | ||
618 | dir_attr.valid = 0; | |
619 | status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); | |
620 | nfs_refresh_inode(dir, &dir_attr); | |
621 | dprintk("NFS reply readdir: %d\n", status); | |
622 | unlock_kernel(); | |
623 | return status; | |
624 | } | |
625 | ||
626 | static int | |
627 | nfs3_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr, | |
628 | dev_t rdev) | |
629 | { | |
630 | struct nfs_fh fh; | |
631 | struct nfs_fattr fattr, dir_attr; | |
632 | struct nfs3_mknodargs arg = { | |
633 | .fh = NFS_FH(dir), | |
634 | .name = dentry->d_name.name, | |
635 | .len = dentry->d_name.len, | |
636 | .sattr = sattr, | |
637 | .rdev = rdev | |
638 | }; | |
639 | struct nfs3_diropres res = { | |
640 | .dir_attr = &dir_attr, | |
641 | .fh = &fh, | |
642 | .fattr = &fattr | |
643 | }; | |
644 | int status; | |
645 | ||
646 | switch (sattr->ia_mode & S_IFMT) { | |
647 | case S_IFBLK: arg.type = NF3BLK; break; | |
648 | case S_IFCHR: arg.type = NF3CHR; break; | |
649 | case S_IFIFO: arg.type = NF3FIFO; break; | |
650 | case S_IFSOCK: arg.type = NF3SOCK; break; | |
651 | default: return -EINVAL; | |
652 | } | |
653 | ||
654 | dprintk("NFS call mknod %s %u:%u\n", dentry->d_name.name, | |
655 | MAJOR(rdev), MINOR(rdev)); | |
656 | dir_attr.valid = 0; | |
657 | fattr.valid = 0; | |
658 | status = rpc_call(NFS_CLIENT(dir), NFS3PROC_MKNOD, &arg, &res, 0); | |
659 | nfs_refresh_inode(dir, &dir_attr); | |
660 | if (status == 0) | |
661 | status = nfs_instantiate(dentry, &fh, &fattr); | |
662 | dprintk("NFS reply mknod: %d\n", status); | |
663 | return status; | |
664 | } | |
665 | ||
666 | static int | |
667 | nfs3_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, | |
668 | struct nfs_fsstat *stat) | |
669 | { | |
670 | int status; | |
671 | ||
672 | dprintk("NFS call fsstat\n"); | |
673 | stat->fattr->valid = 0; | |
674 | status = rpc_call(server->client, NFS3PROC_FSSTAT, fhandle, stat, 0); | |
675 | dprintk("NFS reply statfs: %d\n", status); | |
676 | return status; | |
677 | } | |
678 | ||
679 | static int | |
680 | nfs3_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, | |
681 | struct nfs_fsinfo *info) | |
682 | { | |
683 | int status; | |
684 | ||
685 | dprintk("NFS call fsinfo\n"); | |
686 | info->fattr->valid = 0; | |
687 | status = rpc_call(server->client_sys, NFS3PROC_FSINFO, fhandle, info, 0); | |
688 | dprintk("NFS reply fsinfo: %d\n", status); | |
689 | return status; | |
690 | } | |
691 | ||
692 | static int | |
693 | nfs3_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, | |
694 | struct nfs_pathconf *info) | |
695 | { | |
696 | int status; | |
697 | ||
698 | dprintk("NFS call pathconf\n"); | |
699 | info->fattr->valid = 0; | |
700 | status = rpc_call(server->client, NFS3PROC_PATHCONF, fhandle, info, 0); | |
701 | dprintk("NFS reply pathconf: %d\n", status); | |
702 | return status; | |
703 | } | |
704 | ||
705 | extern u32 *nfs3_decode_dirent(u32 *, struct nfs_entry *, int); | |
706 | ||
707 | static void | |
708 | nfs3_read_done(struct rpc_task *task) | |
709 | { | |
710 | struct nfs_write_data *data = (struct nfs_write_data *) task->tk_calldata; | |
711 | ||
712 | if (nfs3_async_handle_jukebox(task)) | |
713 | return; | |
714 | /* Call back common NFS readpage processing */ | |
715 | if (task->tk_status >= 0) | |
716 | nfs_refresh_inode(data->inode, &data->fattr); | |
717 | nfs_readpage_result(task); | |
718 | } | |
719 | ||
720 | static void | |
721 | nfs3_proc_read_setup(struct nfs_read_data *data) | |
722 | { | |
723 | struct rpc_task *task = &data->task; | |
724 | struct inode *inode = data->inode; | |
725 | int flags; | |
726 | struct rpc_message msg = { | |
727 | .rpc_proc = &nfs3_procedures[NFS3PROC_READ], | |
728 | .rpc_argp = &data->args, | |
729 | .rpc_resp = &data->res, | |
730 | .rpc_cred = data->cred, | |
731 | }; | |
732 | ||
733 | /* N.B. Do we need to test? Never called for swapfile inode */ | |
734 | flags = RPC_TASK_ASYNC | (IS_SWAPFILE(inode)? NFS_RPC_SWAPFLAGS : 0); | |
735 | ||
736 | /* Finalize the task. */ | |
737 | rpc_init_task(task, NFS_CLIENT(inode), nfs3_read_done, flags); | |
738 | rpc_call_setup(task, &msg, 0); | |
739 | } | |
740 | ||
741 | static void | |
742 | nfs3_write_done(struct rpc_task *task) | |
743 | { | |
744 | struct nfs_write_data *data; | |
745 | ||
746 | if (nfs3_async_handle_jukebox(task)) | |
747 | return; | |
748 | data = (struct nfs_write_data *)task->tk_calldata; | |
749 | if (task->tk_status >= 0) | |
750 | nfs_refresh_inode(data->inode, data->res.fattr); | |
751 | nfs_writeback_done(task); | |
752 | } | |
753 | ||
754 | static void | |
755 | nfs3_proc_write_setup(struct nfs_write_data *data, int how) | |
756 | { | |
757 | struct rpc_task *task = &data->task; | |
758 | struct inode *inode = data->inode; | |
759 | int stable; | |
760 | int flags; | |
761 | struct rpc_message msg = { | |
762 | .rpc_proc = &nfs3_procedures[NFS3PROC_WRITE], | |
763 | .rpc_argp = &data->args, | |
764 | .rpc_resp = &data->res, | |
765 | .rpc_cred = data->cred, | |
766 | }; | |
767 | ||
768 | if (how & FLUSH_STABLE) { | |
769 | if (!NFS_I(inode)->ncommit) | |
770 | stable = NFS_FILE_SYNC; | |
771 | else | |
772 | stable = NFS_DATA_SYNC; | |
773 | } else | |
774 | stable = NFS_UNSTABLE; | |
775 | data->args.stable = stable; | |
776 | ||
777 | /* Set the initial flags for the task. */ | |
778 | flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC; | |
779 | ||
780 | /* Finalize the task. */ | |
781 | rpc_init_task(task, NFS_CLIENT(inode), nfs3_write_done, flags); | |
782 | rpc_call_setup(task, &msg, 0); | |
783 | } | |
784 | ||
785 | static void | |
786 | nfs3_commit_done(struct rpc_task *task) | |
787 | { | |
788 | struct nfs_write_data *data; | |
789 | ||
790 | if (nfs3_async_handle_jukebox(task)) | |
791 | return; | |
792 | data = (struct nfs_write_data *)task->tk_calldata; | |
793 | if (task->tk_status >= 0) | |
794 | nfs_refresh_inode(data->inode, data->res.fattr); | |
795 | nfs_commit_done(task); | |
796 | } | |
797 | ||
798 | static void | |
799 | nfs3_proc_commit_setup(struct nfs_write_data *data, int how) | |
800 | { | |
801 | struct rpc_task *task = &data->task; | |
802 | struct inode *inode = data->inode; | |
803 | int flags; | |
804 | struct rpc_message msg = { | |
805 | .rpc_proc = &nfs3_procedures[NFS3PROC_COMMIT], | |
806 | .rpc_argp = &data->args, | |
807 | .rpc_resp = &data->res, | |
808 | .rpc_cred = data->cred, | |
809 | }; | |
810 | ||
811 | /* Set the initial flags for the task. */ | |
812 | flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC; | |
813 | ||
814 | /* Finalize the task. */ | |
815 | rpc_init_task(task, NFS_CLIENT(inode), nfs3_commit_done, flags); | |
816 | rpc_call_setup(task, &msg, 0); | |
817 | } | |
818 | ||
819 | static int | |
820 | nfs3_proc_lock(struct file *filp, int cmd, struct file_lock *fl) | |
821 | { | |
822 | return nlmclnt_proc(filp->f_dentry->d_inode, cmd, fl); | |
823 | } | |
824 | ||
825 | struct nfs_rpc_ops nfs_v3_clientops = { | |
826 | .version = 3, /* protocol version */ | |
827 | .dentry_ops = &nfs_dentry_operations, | |
828 | .dir_inode_ops = &nfs_dir_inode_operations, | |
829 | .getroot = nfs3_proc_get_root, | |
830 | .getattr = nfs3_proc_getattr, | |
831 | .setattr = nfs3_proc_setattr, | |
832 | .lookup = nfs3_proc_lookup, | |
833 | .access = nfs3_proc_access, | |
834 | .readlink = nfs3_proc_readlink, | |
835 | .read = nfs3_proc_read, | |
836 | .write = nfs3_proc_write, | |
837 | .commit = nfs3_proc_commit, | |
838 | .create = nfs3_proc_create, | |
839 | .remove = nfs3_proc_remove, | |
840 | .unlink_setup = nfs3_proc_unlink_setup, | |
841 | .unlink_done = nfs3_proc_unlink_done, | |
842 | .rename = nfs3_proc_rename, | |
843 | .link = nfs3_proc_link, | |
844 | .symlink = nfs3_proc_symlink, | |
845 | .mkdir = nfs3_proc_mkdir, | |
846 | .rmdir = nfs3_proc_rmdir, | |
847 | .readdir = nfs3_proc_readdir, | |
848 | .mknod = nfs3_proc_mknod, | |
849 | .statfs = nfs3_proc_statfs, | |
850 | .fsinfo = nfs3_proc_fsinfo, | |
851 | .pathconf = nfs3_proc_pathconf, | |
852 | .decode_dirent = nfs3_decode_dirent, | |
853 | .read_setup = nfs3_proc_read_setup, | |
854 | .write_setup = nfs3_proc_write_setup, | |
855 | .commit_setup = nfs3_proc_commit_setup, | |
856 | .file_open = nfs_open, | |
857 | .file_release = nfs_release, | |
858 | .lock = nfs3_proc_lock, | |
859 | }; |