4 * This file contains functions to perform synchronous 9P calls
6 * Copyright (C) 2004 by Latchesar Ionkov <lucho@ionkov.net>
7 * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
8 * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to:
22 * Free Software Foundation
23 * 51 Franklin Street, Fifth Floor
24 * Boston, MA 02111-1301 USA
28 #include <linux/config.h>
29 #include <linux/module.h>
30 #include <linux/errno.h>
32 #include <linux/idr.h>
41 * v9fs_t_version - negotiate protocol parameters with sever
42 * @v9ses: 9P2000 session information
43 * @msize: requested max size packet
44 * @version: requested version.extension string
45 * @fcall: pointer to response fcall pointer
50 v9fs_t_version(struct v9fs_session_info *v9ses, u32 msize,
51 char *version, struct v9fs_fcall **rcp)
54 struct v9fs_fcall *tc;
56 dprintk(DEBUG_9P, "msize: %d version: %s\n", msize, version);
57 tc = v9fs_create_tversion(msize, version);
60 ret = v9fs_mux_rpc(v9ses->mux, tc, rcp);
69 * v9fs_t_attach - mount the server
70 * @v9ses: 9P2000 session information
71 * @uname: user name doing the attach
72 * @aname: remote name being attached to
73 * @fid: mount fid to attatch to root node
74 * @afid: authentication fid (in this case result key)
75 * @fcall: pointer to response fcall pointer
80 v9fs_t_attach(struct v9fs_session_info *v9ses, char *uname, char *aname,
81 u32 fid, u32 afid, struct v9fs_fcall **rcp)
84 struct v9fs_fcall* tc;
86 dprintk(DEBUG_9P, "uname '%s' aname '%s' fid %d afid %d\n", uname,
89 tc = v9fs_create_tattach(fid, afid, uname, aname);
91 ret = v9fs_mux_rpc(v9ses->mux, tc, rcp);
99 static void v9fs_t_clunk_cb(void *a, struct v9fs_fcall *tc,
100 struct v9fs_fcall *rc, int err)
103 struct v9fs_session_info *v9ses;
108 fid = tc->params.tclunk.fid;
115 if (rc->id == RCLUNK)
116 v9fs_put_idpool(fid, &v9ses->fidpool);
122 * v9fs_t_clunk - release a fid (finish a transaction)
123 * @v9ses: 9P2000 session information
124 * @fid: fid to release
125 * @fcall: pointer to response fcall pointer
130 v9fs_t_clunk(struct v9fs_session_info *v9ses, u32 fid)
133 struct v9fs_fcall *tc, *rc;
135 dprintk(DEBUG_9P, "fid %d\n", fid);
138 tc = v9fs_create_tclunk(fid);
140 ret = v9fs_mux_rpc(v9ses->mux, tc, &rc);
145 dprintk(DEBUG_ERROR, "failed fid %d err %d\n", fid, ret);
147 v9fs_t_clunk_cb(v9ses, tc, rc, ret);
152 * v9fs_v9fs_t_flush - flush a pending transaction
153 * @v9ses: 9P2000 session information
154 * @tag: tid to release
158 int v9fs_t_flush(struct v9fs_session_info *v9ses, u16 oldtag)
161 struct v9fs_fcall *tc;
163 dprintk(DEBUG_9P, "oldtag %d\n", oldtag);
165 tc = v9fs_create_tflush(oldtag);
167 ret = v9fs_mux_rpc(v9ses->mux, tc, NULL);
176 * v9fs_t_stat - read a file's meta-data
177 * @v9ses: 9P2000 session information
178 * @fid: fid pointing to file or directory to get info about
179 * @fcall: pointer to response fcall
184 v9fs_t_stat(struct v9fs_session_info *v9ses, u32 fid, struct v9fs_fcall **rcp)
187 struct v9fs_fcall *tc;
189 dprintk(DEBUG_9P, "fid %d\n", fid);
192 tc = v9fs_create_tstat(fid);
194 ret = v9fs_mux_rpc(v9ses->mux, tc, rcp);
203 * v9fs_t_wstat - write a file's meta-data
204 * @v9ses: 9P2000 session information
205 * @fid: fid pointing to file or directory to write info about
207 * @fcall: pointer to response fcall
212 v9fs_t_wstat(struct v9fs_session_info *v9ses, u32 fid,
213 struct v9fs_wstat *wstat, struct v9fs_fcall **rcp)
216 struct v9fs_fcall *tc;
218 dprintk(DEBUG_9P, "fid %d\n", fid);
220 tc = v9fs_create_twstat(fid, wstat, v9ses->extended);
222 ret = v9fs_mux_rpc(v9ses->mux, tc, rcp);
231 * v9fs_t_walk - walk a fid to a new file or directory
232 * @v9ses: 9P2000 session information
234 * @newfid: new fid (for clone operations)
235 * @name: path to walk fid to
236 * @fcall: pointer to response fcall
240 /* TODO: support multiple walk */
243 v9fs_t_walk(struct v9fs_session_info *v9ses, u32 fid, u32 newfid,
244 char *name, struct v9fs_fcall **rcp)
247 struct v9fs_fcall *tc;
250 dprintk(DEBUG_9P, "fid %d newfid %d wname '%s'\n", fid, newfid, name);
257 tc = v9fs_create_twalk(fid, newfid, nwname, &name);
259 ret = v9fs_mux_rpc(v9ses->mux, tc, rcp);
268 * v9fs_t_open - open a file
270 * @v9ses - 9P2000 session information
272 * @mode - mode to open file (R, RW, etc)
273 * @fcall - pointer to response fcall
278 v9fs_t_open(struct v9fs_session_info *v9ses, u32 fid, u8 mode,
279 struct v9fs_fcall **rcp)
282 struct v9fs_fcall *tc;
284 dprintk(DEBUG_9P, "fid %d mode %d\n", fid, mode);
286 tc = v9fs_create_topen(fid, mode);
288 ret = v9fs_mux_rpc(v9ses->mux, tc, rcp);
297 * v9fs_t_remove - remove a file or directory
298 * @v9ses: 9P2000 session information
299 * @fid: fid to remove
300 * @fcall: pointer to response fcall
305 v9fs_t_remove(struct v9fs_session_info *v9ses, u32 fid,
306 struct v9fs_fcall **rcp)
309 struct v9fs_fcall *tc;
311 dprintk(DEBUG_9P, "fid %d\n", fid);
313 tc = v9fs_create_tremove(fid);
315 ret = v9fs_mux_rpc(v9ses->mux, tc, rcp);
324 * v9fs_t_create - create a file or directory
325 * @v9ses: 9P2000 session information
326 * @fid: fid to create
327 * @name: name of the file or directory to create
328 * @perm: permissions to create with
329 * @mode: mode to open file (R, RW, etc)
330 * @fcall: pointer to response fcall
335 v9fs_t_create(struct v9fs_session_info *v9ses, u32 fid, char *name,
336 u32 perm, u8 mode, struct v9fs_fcall **rcp)
339 struct v9fs_fcall *tc;
341 dprintk(DEBUG_9P, "fid %d name '%s' perm %x mode %d\n",
342 fid, name, perm, mode);
344 tc = v9fs_create_tcreate(fid, name, perm, mode);
346 ret = v9fs_mux_rpc(v9ses->mux, tc, rcp);
355 * v9fs_t_read - read data
356 * @v9ses: 9P2000 session information
357 * @fid: fid to read from
358 * @offset: offset to start read at
359 * @count: how many bytes to read
360 * @fcall: pointer to response fcall (with data)
365 v9fs_t_read(struct v9fs_session_info *v9ses, u32 fid, u64 offset,
366 u32 count, struct v9fs_fcall **rcp)
369 struct v9fs_fcall *tc, *rc;
371 dprintk(DEBUG_9P, "fid %d offset 0x%llux count 0x%x\n", fid,
372 (long long unsigned) offset, count);
374 tc = v9fs_create_tread(fid, offset, count);
376 ret = v9fs_mux_rpc(v9ses->mux, tc, &rc);
378 ret = rc->params.rread.count;
392 * v9fs_t_write - write data
393 * @v9ses: 9P2000 session information
394 * @fid: fid to write to
395 * @offset: offset to start write at
396 * @count: how many bytes to write
397 * @fcall: pointer to response fcall
402 v9fs_t_write(struct v9fs_session_info *v9ses, u32 fid, u64 offset, u32 count,
403 const char __user *data, struct v9fs_fcall **rcp)
406 struct v9fs_fcall *tc, *rc;
408 dprintk(DEBUG_9P, "fid %d offset 0x%llux count 0x%x\n", fid,
409 (long long unsigned) offset, count);
411 tc = v9fs_create_twrite(fid, offset, count, data);
413 ret = v9fs_mux_rpc(v9ses->mux, tc, &rc);
416 ret = rc->params.rwrite.count;