Commit | Line | Data |
---|---|---|
b8cf945b | 1 | /* |
67543e50 | 2 | * linux/fs/9p/fcall.c |
b8cf945b | 3 | * |
531b1094 | 4 | * This file contains functions to perform synchronous 9P calls |
b8cf945b | 5 | * |
531b1094 | 6 | * Copyright (C) 2004 by Latchesar Ionkov <lucho@ionkov.net> |
b8cf945b EVH |
7 | * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com> |
8 | * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov> | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
42e8c509 EVH |
11 | * it under the terms of the GNU General Public License version 2 |
12 | * as published by the Free Software Foundation. | |
b8cf945b EVH |
13 | * |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to: | |
21 | * Free Software Foundation | |
22 | * 51 Franklin Street, Fifth Floor | |
23 | * Boston, MA 02111-1301 USA | |
24 | * | |
25 | */ | |
26 | ||
b8cf945b EVH |
27 | #include <linux/module.h> |
28 | #include <linux/errno.h> | |
29 | #include <linux/fs.h> | |
30 | #include <linux/idr.h> | |
31 | ||
32 | #include "debug.h" | |
33 | #include "v9fs.h" | |
34 | #include "9p.h" | |
531b1094 | 35 | #include "conv.h" |
b8cf945b EVH |
36 | #include "mux.h" |
37 | ||
38 | /** | |
39 | * v9fs_t_version - negotiate protocol parameters with sever | |
40 | * @v9ses: 9P2000 session information | |
41 | * @msize: requested max size packet | |
42 | * @version: requested version.extension string | |
43 | * @fcall: pointer to response fcall pointer | |
44 | * | |
45 | */ | |
46 | ||
47 | int | |
48 | v9fs_t_version(struct v9fs_session_info *v9ses, u32 msize, | |
531b1094 | 49 | char *version, struct v9fs_fcall **rcp) |
b8cf945b | 50 | { |
531b1094 LI |
51 | int ret; |
52 | struct v9fs_fcall *tc; | |
b8cf945b EVH |
53 | |
54 | dprintk(DEBUG_9P, "msize: %d version: %s\n", msize, version); | |
531b1094 | 55 | tc = v9fs_create_tversion(msize, version); |
b8cf945b | 56 | |
531b1094 LI |
57 | if (!IS_ERR(tc)) { |
58 | ret = v9fs_mux_rpc(v9ses->mux, tc, rcp); | |
59 | kfree(tc); | |
60 | } else | |
61 | ret = PTR_ERR(tc); | |
62 | ||
63 | return ret; | |
b8cf945b EVH |
64 | } |
65 | ||
66 | /** | |
67 | * v9fs_t_attach - mount the server | |
68 | * @v9ses: 9P2000 session information | |
69 | * @uname: user name doing the attach | |
70 | * @aname: remote name being attached to | |
71 | * @fid: mount fid to attatch to root node | |
72 | * @afid: authentication fid (in this case result key) | |
73 | * @fcall: pointer to response fcall pointer | |
74 | * | |
75 | */ | |
76 | ||
77 | int | |
78 | v9fs_t_attach(struct v9fs_session_info *v9ses, char *uname, char *aname, | |
531b1094 | 79 | u32 fid, u32 afid, struct v9fs_fcall **rcp) |
b8cf945b | 80 | { |
531b1094 LI |
81 | int ret; |
82 | struct v9fs_fcall* tc; | |
b8cf945b EVH |
83 | |
84 | dprintk(DEBUG_9P, "uname '%s' aname '%s' fid %d afid %d\n", uname, | |
85 | aname, fid, afid); | |
b8cf945b | 86 | |
531b1094 LI |
87 | tc = v9fs_create_tattach(fid, afid, uname, aname); |
88 | if (!IS_ERR(tc)) { | |
89 | ret = v9fs_mux_rpc(v9ses->mux, tc, rcp); | |
90 | kfree(tc); | |
91 | } else | |
92 | ret = PTR_ERR(tc); | |
93 | ||
94 | return ret; | |
3cf6429a LI |
95 | } |
96 | ||
97 | static void v9fs_t_clunk_cb(void *a, struct v9fs_fcall *tc, | |
98 | struct v9fs_fcall *rc, int err) | |
99 | { | |
343f1fe6 | 100 | int fid, id; |
3cf6429a LI |
101 | struct v9fs_session_info *v9ses; |
102 | ||
343f1fe6 | 103 | id = 0; |
3cf6429a | 104 | fid = tc->params.tclunk.fid; |
343f1fe6 LI |
105 | if (rc) |
106 | id = rc->id; | |
3cf6429a | 107 | |
343f1fe6 | 108 | kfree(tc); |
3cf6429a | 109 | kfree(rc); |
343f1fe6 LI |
110 | if (id == RCLUNK) { |
111 | v9ses = a; | |
112 | v9fs_put_idpool(fid, &v9ses->fidpool); | |
113 | } | |
b8cf945b EVH |
114 | } |
115 | ||
116 | /** | |
117 | * v9fs_t_clunk - release a fid (finish a transaction) | |
118 | * @v9ses: 9P2000 session information | |
119 | * @fid: fid to release | |
120 | * @fcall: pointer to response fcall pointer | |
121 | * | |
122 | */ | |
531b1094 | 123 | |
b8cf945b | 124 | int |
3cf6429a | 125 | v9fs_t_clunk(struct v9fs_session_info *v9ses, u32 fid) |
b8cf945b | 126 | { |
531b1094 | 127 | int ret; |
3cf6429a LI |
128 | struct v9fs_fcall *tc, *rc; |
129 | ||
b8cf945b | 130 | dprintk(DEBUG_9P, "fid %d\n", fid); |
b8cf945b | 131 | |
531b1094 LI |
132 | rc = NULL; |
133 | tc = v9fs_create_tclunk(fid); | |
134 | if (!IS_ERR(tc)) | |
135 | ret = v9fs_mux_rpc(v9ses->mux, tc, &rc); | |
136 | else | |
137 | ret = PTR_ERR(tc); | |
138 | ||
139 | if (ret) | |
140 | dprintk(DEBUG_ERROR, "failed fid %d err %d\n", fid, ret); | |
3cf6429a | 141 | |
531b1094 LI |
142 | v9fs_t_clunk_cb(v9ses, tc, rc, ret); |
143 | return ret; | |
b8cf945b EVH |
144 | } |
145 | ||
29c6e486 | 146 | #if 0 |
b8cf945b EVH |
147 | /** |
148 | * v9fs_v9fs_t_flush - flush a pending transaction | |
149 | * @v9ses: 9P2000 session information | |
4a26c242 | 150 | * @tag: tag to release |
b8cf945b EVH |
151 | * |
152 | */ | |
531b1094 | 153 | int v9fs_t_flush(struct v9fs_session_info *v9ses, u16 oldtag) |
b8cf945b | 154 | { |
531b1094 LI |
155 | int ret; |
156 | struct v9fs_fcall *tc; | |
b8cf945b | 157 | |
531b1094 LI |
158 | dprintk(DEBUG_9P, "oldtag %d\n", oldtag); |
159 | ||
531b1094 LI |
160 | tc = v9fs_create_tflush(oldtag); |
161 | if (!IS_ERR(tc)) { | |
162 | ret = v9fs_mux_rpc(v9ses->mux, tc, NULL); | |
163 | kfree(tc); | |
164 | } else | |
165 | ret = PTR_ERR(tc); | |
166 | ||
167 | return ret; | |
b8cf945b | 168 | } |
67543e50 | 169 | #endif |
b8cf945b EVH |
170 | |
171 | /** | |
172 | * v9fs_t_stat - read a file's meta-data | |
173 | * @v9ses: 9P2000 session information | |
174 | * @fid: fid pointing to file or directory to get info about | |
175 | * @fcall: pointer to response fcall | |
176 | * | |
177 | */ | |
178 | ||
179 | int | |
531b1094 | 180 | v9fs_t_stat(struct v9fs_session_info *v9ses, u32 fid, struct v9fs_fcall **rcp) |
b8cf945b | 181 | { |
531b1094 LI |
182 | int ret; |
183 | struct v9fs_fcall *tc; | |
b8cf945b EVH |
184 | |
185 | dprintk(DEBUG_9P, "fid %d\n", fid); | |
b8cf945b | 186 | |
531b1094 LI |
187 | ret = -ENOMEM; |
188 | tc = v9fs_create_tstat(fid); | |
189 | if (!IS_ERR(tc)) { | |
190 | ret = v9fs_mux_rpc(v9ses->mux, tc, rcp); | |
191 | kfree(tc); | |
192 | } else | |
193 | ret = PTR_ERR(tc); | |
194 | ||
195 | return ret; | |
b8cf945b EVH |
196 | } |
197 | ||
198 | /** | |
199 | * v9fs_t_wstat - write a file's meta-data | |
200 | * @v9ses: 9P2000 session information | |
201 | * @fid: fid pointing to file or directory to write info about | |
202 | * @stat: metadata | |
203 | * @fcall: pointer to response fcall | |
204 | * | |
205 | */ | |
206 | ||
207 | int | |
208 | v9fs_t_wstat(struct v9fs_session_info *v9ses, u32 fid, | |
531b1094 | 209 | struct v9fs_wstat *wstat, struct v9fs_fcall **rcp) |
b8cf945b | 210 | { |
531b1094 LI |
211 | int ret; |
212 | struct v9fs_fcall *tc; | |
b8cf945b | 213 | |
531b1094 LI |
214 | dprintk(DEBUG_9P, "fid %d\n", fid); |
215 | ||
531b1094 LI |
216 | tc = v9fs_create_twstat(fid, wstat, v9ses->extended); |
217 | if (!IS_ERR(tc)) { | |
218 | ret = v9fs_mux_rpc(v9ses->mux, tc, rcp); | |
219 | kfree(tc); | |
220 | } else | |
221 | ret = PTR_ERR(tc); | |
b8cf945b | 222 | |
531b1094 | 223 | return ret; |
b8cf945b EVH |
224 | } |
225 | ||
226 | /** | |
227 | * v9fs_t_walk - walk a fid to a new file or directory | |
228 | * @v9ses: 9P2000 session information | |
229 | * @fid: fid to walk | |
230 | * @newfid: new fid (for clone operations) | |
231 | * @name: path to walk fid to | |
232 | * @fcall: pointer to response fcall | |
233 | * | |
234 | */ | |
235 | ||
236 | /* TODO: support multiple walk */ | |
237 | ||
238 | int | |
239 | v9fs_t_walk(struct v9fs_session_info *v9ses, u32 fid, u32 newfid, | |
531b1094 | 240 | char *name, struct v9fs_fcall **rcp) |
b8cf945b | 241 | { |
531b1094 LI |
242 | int ret; |
243 | struct v9fs_fcall *tc; | |
244 | int nwname; | |
b8cf945b EVH |
245 | |
246 | dprintk(DEBUG_9P, "fid %d newfid %d wname '%s'\n", fid, newfid, name); | |
531b1094 LI |
247 | |
248 | if (name) | |
249 | nwname = 1; | |
250 | else | |
251 | nwname = 0; | |
252 | ||
531b1094 LI |
253 | tc = v9fs_create_twalk(fid, newfid, nwname, &name); |
254 | if (!IS_ERR(tc)) { | |
255 | ret = v9fs_mux_rpc(v9ses->mux, tc, rcp); | |
256 | kfree(tc); | |
257 | } else | |
258 | ret = PTR_ERR(tc); | |
259 | ||
260 | return ret; | |
b8cf945b EVH |
261 | } |
262 | ||
263 | /** | |
264 | * v9fs_t_open - open a file | |
265 | * | |
266 | * @v9ses - 9P2000 session information | |
267 | * @fid - fid to open | |
268 | * @mode - mode to open file (R, RW, etc) | |
269 | * @fcall - pointer to response fcall | |
270 | * | |
271 | */ | |
272 | ||
273 | int | |
274 | v9fs_t_open(struct v9fs_session_info *v9ses, u32 fid, u8 mode, | |
531b1094 | 275 | struct v9fs_fcall **rcp) |
b8cf945b | 276 | { |
531b1094 LI |
277 | int ret; |
278 | struct v9fs_fcall *tc; | |
b8cf945b EVH |
279 | |
280 | dprintk(DEBUG_9P, "fid %d mode %d\n", fid, mode); | |
b8cf945b | 281 | |
531b1094 LI |
282 | tc = v9fs_create_topen(fid, mode); |
283 | if (!IS_ERR(tc)) { | |
284 | ret = v9fs_mux_rpc(v9ses->mux, tc, rcp); | |
285 | kfree(tc); | |
286 | } else | |
287 | ret = PTR_ERR(tc); | |
b8cf945b | 288 | |
531b1094 | 289 | return ret; |
b8cf945b EVH |
290 | } |
291 | ||
292 | /** | |
293 | * v9fs_t_remove - remove a file or directory | |
294 | * @v9ses: 9P2000 session information | |
295 | * @fid: fid to remove | |
296 | * @fcall: pointer to response fcall | |
297 | * | |
298 | */ | |
299 | ||
300 | int | |
301 | v9fs_t_remove(struct v9fs_session_info *v9ses, u32 fid, | |
531b1094 | 302 | struct v9fs_fcall **rcp) |
b8cf945b | 303 | { |
531b1094 LI |
304 | int ret; |
305 | struct v9fs_fcall *tc; | |
b8cf945b EVH |
306 | |
307 | dprintk(DEBUG_9P, "fid %d\n", fid); | |
531b1094 | 308 | |
531b1094 LI |
309 | tc = v9fs_create_tremove(fid); |
310 | if (!IS_ERR(tc)) { | |
311 | ret = v9fs_mux_rpc(v9ses->mux, tc, rcp); | |
312 | kfree(tc); | |
313 | } else | |
314 | ret = PTR_ERR(tc); | |
315 | ||
316 | return ret; | |
b8cf945b EVH |
317 | } |
318 | ||
319 | /** | |
320 | * v9fs_t_create - create a file or directory | |
321 | * @v9ses: 9P2000 session information | |
322 | * @fid: fid to create | |
323 | * @name: name of the file or directory to create | |
324 | * @perm: permissions to create with | |
325 | * @mode: mode to open file (R, RW, etc) | |
326 | * @fcall: pointer to response fcall | |
327 | * | |
328 | */ | |
329 | ||
330 | int | |
16cce6d2 LI |
331 | v9fs_t_create(struct v9fs_session_info *v9ses, u32 fid, char *name, u32 perm, |
332 | u8 mode, char *extension, struct v9fs_fcall **rcp) | |
b8cf945b | 333 | { |
531b1094 LI |
334 | int ret; |
335 | struct v9fs_fcall *tc; | |
b8cf945b EVH |
336 | |
337 | dprintk(DEBUG_9P, "fid %d name '%s' perm %x mode %d\n", | |
338 | fid, name, perm, mode); | |
339 | ||
16cce6d2 LI |
340 | tc = v9fs_create_tcreate(fid, name, perm, mode, extension, |
341 | v9ses->extended); | |
342 | ||
531b1094 LI |
343 | if (!IS_ERR(tc)) { |
344 | ret = v9fs_mux_rpc(v9ses->mux, tc, rcp); | |
345 | kfree(tc); | |
346 | } else | |
347 | ret = PTR_ERR(tc); | |
b8cf945b | 348 | |
531b1094 | 349 | return ret; |
b8cf945b EVH |
350 | } |
351 | ||
352 | /** | |
353 | * v9fs_t_read - read data | |
354 | * @v9ses: 9P2000 session information | |
355 | * @fid: fid to read from | |
356 | * @offset: offset to start read at | |
357 | * @count: how many bytes to read | |
358 | * @fcall: pointer to response fcall (with data) | |
359 | * | |
360 | */ | |
361 | ||
362 | int | |
363 | v9fs_t_read(struct v9fs_session_info *v9ses, u32 fid, u64 offset, | |
531b1094 | 364 | u32 count, struct v9fs_fcall **rcp) |
b8cf945b | 365 | { |
531b1094 LI |
366 | int ret; |
367 | struct v9fs_fcall *tc, *rc; | |
b8cf945b | 368 | |
531b1094 LI |
369 | dprintk(DEBUG_9P, "fid %d offset 0x%llux count 0x%x\n", fid, |
370 | (long long unsigned) offset, count); | |
371 | ||
531b1094 LI |
372 | tc = v9fs_create_tread(fid, offset, count); |
373 | if (!IS_ERR(tc)) { | |
374 | ret = v9fs_mux_rpc(v9ses->mux, tc, &rc); | |
375 | if (!ret) | |
376 | ret = rc->params.rread.count; | |
377 | if (rcp) | |
378 | *rcp = rc; | |
379 | else | |
380 | kfree(rc); | |
381 | ||
382 | kfree(tc); | |
383 | } else | |
384 | ret = PTR_ERR(tc); | |
385 | ||
386 | return ret; | |
b8cf945b EVH |
387 | } |
388 | ||
389 | /** | |
390 | * v9fs_t_write - write data | |
391 | * @v9ses: 9P2000 session information | |
392 | * @fid: fid to write to | |
393 | * @offset: offset to start write at | |
394 | * @count: how many bytes to write | |
395 | * @fcall: pointer to response fcall | |
396 | * | |
397 | */ | |
398 | ||
399 | int | |
531b1094 LI |
400 | v9fs_t_write(struct v9fs_session_info *v9ses, u32 fid, u64 offset, u32 count, |
401 | const char __user *data, struct v9fs_fcall **rcp) | |
b8cf945b | 402 | { |
531b1094 LI |
403 | int ret; |
404 | struct v9fs_fcall *tc, *rc; | |
b8cf945b | 405 | |
531b1094 LI |
406 | dprintk(DEBUG_9P, "fid %d offset 0x%llux count 0x%x\n", fid, |
407 | (long long unsigned) offset, count); | |
b8cf945b | 408 | |
531b1094 LI |
409 | tc = v9fs_create_twrite(fid, offset, count, data); |
410 | if (!IS_ERR(tc)) { | |
411 | ret = v9fs_mux_rpc(v9ses->mux, tc, &rc); | |
b8cf945b | 412 | |
531b1094 LI |
413 | if (!ret) |
414 | ret = rc->params.rwrite.count; | |
415 | if (rcp) | |
416 | *rcp = rc; | |
417 | else | |
418 | kfree(rc); | |
b8cf945b | 419 | |
531b1094 LI |
420 | kfree(tc); |
421 | } else | |
422 | ret = PTR_ERR(tc); | |
b8cf945b | 423 | |
531b1094 | 424 | return ret; |
b8cf945b | 425 | } |
531b1094 | 426 |