Commit | Line | Data |
---|---|---|
bd238fb4 LI |
1 | /* |
2 | * linux/fs/9p/trans_fd.c | |
3 | * | |
4 | * Fd transport layer. Includes deprecated socket layer. | |
5 | * | |
6 | * Copyright (C) 2006 by Russ Cox <rsc@swtch.com> | |
7 | * Copyright (C) 2004-2005 by Latchesar Ionkov <lucho@ionkov.net> | |
8a0dc95f | 8 | * Copyright (C) 2004-2008 by Eric Van Hensbergen <ericvh@gmail.com> |
bd238fb4 LI |
9 | * Copyright (C) 1997-2002 by Ron Minnich <rminnich@sarnoff.com> |
10 | * | |
11 | * This program is free software; you can redistribute it and/or modify | |
12 | * it under the terms of the GNU General Public License version 2 | |
13 | * as published by the Free Software Foundation. | |
14 | * | |
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. | |
19 | * | |
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 | |
25 | * | |
26 | */ | |
27 | ||
5d385153 JP |
28 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
29 | ||
bd238fb4 LI |
30 | #include <linux/in.h> |
31 | #include <linux/module.h> | |
32 | #include <linux/net.h> | |
33 | #include <linux/ipv6.h> | |
8a0dc95f | 34 | #include <linux/kthread.h> |
bd238fb4 LI |
35 | #include <linux/errno.h> |
36 | #include <linux/kernel.h> | |
37 | #include <linux/un.h> | |
38 | #include <linux/uaccess.h> | |
39 | #include <linux/inet.h> | |
40 | #include <linux/idr.h> | |
41 | #include <linux/file.h> | |
a80d923e | 42 | #include <linux/parser.h> |
5a0e3ad6 | 43 | #include <linux/slab.h> |
c4fac910 | 44 | #include <linux/seq_file.h> |
bd238fb4 | 45 | #include <net/9p/9p.h> |
8b81ef58 | 46 | #include <net/9p/client.h> |
bd238fb4 LI |
47 | #include <net/9p/transport.h> |
48 | ||
6b18662e AV |
49 | #include <linux/syscalls.h> /* killme */ |
50 | ||
bd238fb4 | 51 | #define P9_PORT 564 |
a80d923e | 52 | #define MAX_SOCK_BUF (64*1024) |
8a0dc95f | 53 | #define MAXPOLLWADDR 2 |
a80d923e | 54 | |
c4fac910 DH |
55 | static struct p9_trans_module p9_tcp_trans; |
56 | static struct p9_trans_module p9_fd_trans; | |
57 | ||
ee443996 EVH |
58 | /** |
59 | * struct p9_fd_opts - per-transport options | |
60 | * @rfd: file descriptor for reading (trans=fd) | |
61 | * @wfd: file descriptor for writing (trans=fd) | |
62 | * @port: port to connect to (trans=tcp) | |
63 | * | |
64 | */ | |
65 | ||
a80d923e EVH |
66 | struct p9_fd_opts { |
67 | int rfd; | |
68 | int wfd; | |
69 | u16 port; | |
c4fac910 | 70 | bool privport; |
a80d923e | 71 | }; |
bd238fb4 | 72 | |
a80d923e EVH |
73 | /* |
74 | * Option Parsing (code inspired by NFS code) | |
75 | * - a little lazy - parse all fd-transport options | |
76 | */ | |
bd238fb4 | 77 | |
a80d923e EVH |
78 | enum { |
79 | /* Options that take integer arguments */ | |
55762690 | 80 | Opt_port, Opt_rfdno, Opt_wfdno, Opt_err, |
2f28c8b3 JG |
81 | /* Options that take no arguments */ |
82 | Opt_privport, | |
a80d923e | 83 | }; |
bd238fb4 | 84 | |
a447c093 | 85 | static const match_table_t tokens = { |
a80d923e EVH |
86 | {Opt_port, "port=%u"}, |
87 | {Opt_rfdno, "rfdno=%u"}, | |
88 | {Opt_wfdno, "wfdno=%u"}, | |
2f28c8b3 | 89 | {Opt_privport, "privport"}, |
55762690 | 90 | {Opt_err, NULL}, |
a80d923e | 91 | }; |
bd238fb4 | 92 | |
8a0dc95f EVH |
93 | enum { |
94 | Rworksched = 1, /* read work scheduled or running */ | |
95 | Rpending = 2, /* can read */ | |
96 | Wworksched = 4, /* write work scheduled or running */ | |
97 | Wpending = 8, /* can write */ | |
98 | }; | |
99 | ||
992b3f1d TH |
100 | struct p9_poll_wait { |
101 | struct p9_conn *conn; | |
ac6424b9 | 102 | wait_queue_entry_t wait; |
992b3f1d | 103 | wait_queue_head_t *wait_addr; |
ee443996 EVH |
104 | }; |
105 | ||
106 | /** | |
107 | * struct p9_conn - fd mux connection state information | |
ee443996 | 108 | * @mux_list: list link for mux to manage multiple connections (?) |
8b81ef58 | 109 | * @client: reference to client instance for this connection |
ee443996 | 110 | * @err: error state |
ee443996 EVH |
111 | * @req_list: accounting for requests which have been sent |
112 | * @unsent_req_list: accounting for requests that haven't been sent | |
1b0a763b EVH |
113 | * @req: current request being processed (if any) |
114 | * @tmp_buf: temporary buffer to read in header | |
947867aa | 115 | * @rc: temporary fcall for reading current frame |
ee443996 EVH |
116 | * @wpos: write position for current frame |
117 | * @wsize: amount of data to write for current frame | |
118 | * @wbuf: current write buffer | |
0e15597e | 119 | * @poll_pending_link: pending links to be polled per conn |
ee443996 | 120 | * @poll_wait: array of wait_q's for various worker threads |
ee443996 EVH |
121 | * @pt: poll state |
122 | * @rq: current read work | |
123 | * @wq: current write work | |
124 | * @wsched: ???? | |
125 | * | |
126 | */ | |
8a0dc95f EVH |
127 | |
128 | struct p9_conn { | |
8a0dc95f | 129 | struct list_head mux_list; |
8b81ef58 | 130 | struct p9_client *client; |
8a0dc95f | 131 | int err; |
8a0dc95f EVH |
132 | struct list_head req_list; |
133 | struct list_head unsent_req_list; | |
6d35190f | 134 | struct p9_req_t *rreq; |
728356de | 135 | struct p9_req_t *wreq; |
1b0a763b | 136 | char tmp_buf[7]; |
947867aa | 137 | struct p9_fcall rc; |
8a0dc95f EVH |
138 | int wpos; |
139 | int wsize; | |
140 | char *wbuf; | |
992b3f1d TH |
141 | struct list_head poll_pending_link; |
142 | struct p9_poll_wait poll_wait[MAXPOLLWADDR]; | |
8a0dc95f EVH |
143 | poll_table pt; |
144 | struct work_struct rq; | |
145 | struct work_struct wq; | |
146 | unsigned long wsched; | |
147 | }; | |
148 | ||
263c5828 SD |
149 | /** |
150 | * struct p9_trans_fd - transport state | |
151 | * @rd: reference to file to read from | |
152 | * @wr: reference of file to write to | |
153 | * @conn: connection state reference | |
154 | * | |
155 | */ | |
156 | ||
157 | struct p9_trans_fd { | |
158 | struct file *rd; | |
159 | struct file *wr; | |
160 | struct p9_conn conn; | |
161 | }; | |
162 | ||
aa70c585 TH |
163 | static void p9_poll_workfn(struct work_struct *work); |
164 | ||
992b3f1d TH |
165 | static DEFINE_SPINLOCK(p9_poll_lock); |
166 | static LIST_HEAD(p9_poll_pending_list); | |
aa70c585 | 167 | static DECLARE_WORK(p9_poll_work, p9_poll_workfn); |
8a0dc95f | 168 | |
2f28c8b3 JG |
169 | static unsigned int p9_ipport_resv_min = P9_DEF_MIN_RESVPORT; |
170 | static unsigned int p9_ipport_resv_max = P9_DEF_MAX_RESVPORT; | |
171 | ||
992b3f1d | 172 | static void p9_mux_poll_stop(struct p9_conn *m) |
8a0dc95f | 173 | { |
992b3f1d TH |
174 | unsigned long flags; |
175 | int i; | |
8a0dc95f | 176 | |
992b3f1d TH |
177 | for (i = 0; i < ARRAY_SIZE(m->poll_wait); i++) { |
178 | struct p9_poll_wait *pwait = &m->poll_wait[i]; | |
8a0dc95f | 179 | |
992b3f1d TH |
180 | if (pwait->wait_addr) { |
181 | remove_wait_queue(pwait->wait_addr, &pwait->wait); | |
182 | pwait->wait_addr = NULL; | |
8a0dc95f | 183 | } |
8a0dc95f EVH |
184 | } |
185 | ||
992b3f1d TH |
186 | spin_lock_irqsave(&p9_poll_lock, flags); |
187 | list_del_init(&m->poll_pending_link); | |
188 | spin_unlock_irqrestore(&p9_poll_lock, flags); | |
430ac66e TB |
189 | |
190 | flush_work(&p9_poll_work); | |
8a0dc95f EVH |
191 | } |
192 | ||
193 | /** | |
5503ac56 EVH |
194 | * p9_conn_cancel - cancel all pending requests with error |
195 | * @m: mux data | |
196 | * @err: error code | |
8a0dc95f | 197 | * |
8a0dc95f | 198 | */ |
ee443996 | 199 | |
51a87c55 | 200 | static void p9_conn_cancel(struct p9_conn *m, int err) |
8a0dc95f | 201 | { |
673d62cd | 202 | struct p9_req_t *req, *rtmp; |
5503ac56 | 203 | LIST_HEAD(cancel_list); |
8a0dc95f | 204 | |
5d385153 | 205 | p9_debug(P9_DEBUG_ERROR, "mux %p err %d\n", m, err); |
7eb923b8 | 206 | |
9f476d7c | 207 | spin_lock(&m->client->lock); |
7eb923b8 EVH |
208 | |
209 | if (m->err) { | |
9f476d7c | 210 | spin_unlock(&m->client->lock); |
7eb923b8 EVH |
211 | return; |
212 | } | |
213 | ||
214 | m->err = err; | |
215 | ||
5503ac56 EVH |
216 | list_for_each_entry_safe(req, rtmp, &m->req_list, req_list) { |
217 | list_move(&req->req_list, &cancel_list); | |
218 | } | |
219 | list_for_each_entry_safe(req, rtmp, &m->unsent_req_list, req_list) { | |
220 | list_move(&req->req_list, &cancel_list); | |
8a0dc95f EVH |
221 | } |
222 | ||
5503ac56 | 223 | list_for_each_entry_safe(req, rtmp, &cancel_list, req_list) { |
5d385153 | 224 | p9_debug(P9_DEBUG_ERROR, "call back req %p\n", req); |
1bab88b2 | 225 | list_del(&req->req_list); |
2b6e72ed DM |
226 | if (!req->t_err) |
227 | req->t_err = err; | |
228 | p9_client_cb(m->client, req, REQ_STATUS_ERROR); | |
8a0dc95f | 229 | } |
9f476d7c | 230 | spin_unlock(&m->client->lock); |
8a0dc95f EVH |
231 | } |
232 | ||
7594bf37 AV |
233 | static __poll_t |
234 | p9_fd_poll(struct p9_client *client, struct poll_table_struct *pt, int *err) | |
8a0dc95f | 235 | { |
9965ed17 | 236 | __poll_t ret; |
5503ac56 | 237 | struct p9_trans_fd *ts = NULL; |
8a0dc95f | 238 | |
5503ac56 EVH |
239 | if (client && client->status == Connected) |
240 | ts = client->trans; | |
7dc5d24b | 241 | |
7594bf37 AV |
242 | if (!ts) { |
243 | if (err) | |
244 | *err = -EREMOTEIO; | |
a9a08845 | 245 | return EPOLLERR; |
7594bf37 | 246 | } |
7dc5d24b | 247 | |
9965ed17 CH |
248 | ret = vfs_poll(ts->rd, pt); |
249 | if (ts->rd != ts->wr) | |
250 | ret = (ret & ~EPOLLOUT) | (vfs_poll(ts->wr, pt) & ~EPOLLIN); | |
5503ac56 | 251 | return ret; |
992b3f1d TH |
252 | } |
253 | ||
8a0dc95f | 254 | /** |
5503ac56 EVH |
255 | * p9_fd_read- read from a fd |
256 | * @client: client instance | |
257 | * @v: buffer to receive data into | |
258 | * @len: size of receive buffer | |
ee443996 | 259 | * |
8a0dc95f | 260 | */ |
ee443996 | 261 | |
5503ac56 | 262 | static int p9_fd_read(struct p9_client *client, void *v, int len) |
8a0dc95f | 263 | { |
5503ac56 EVH |
264 | int ret; |
265 | struct p9_trans_fd *ts = NULL; | |
bdd1d2d3 | 266 | loff_t pos; |
8a0dc95f | 267 | |
5503ac56 EVH |
268 | if (client && client->status != Disconnected) |
269 | ts = client->trans; | |
8a0dc95f | 270 | |
5503ac56 EVH |
271 | if (!ts) |
272 | return -EREMOTEIO; | |
8a0dc95f | 273 | |
5503ac56 | 274 | if (!(ts->rd->f_flags & O_NONBLOCK)) |
5d385153 | 275 | p9_debug(P9_DEBUG_ERROR, "blocking read ...\n"); |
8a0dc95f | 276 | |
bdd1d2d3 CH |
277 | pos = ts->rd->f_pos; |
278 | ret = kernel_read(ts->rd, v, len, &pos); | |
5503ac56 EVH |
279 | if (ret <= 0 && ret != -ERESTARTSYS && ret != -EAGAIN) |
280 | client->status = Disconnected; | |
281 | return ret; | |
8a0dc95f EVH |
282 | } |
283 | ||
284 | /** | |
5503ac56 EVH |
285 | * p9_read_work - called when there is some data to be read from a transport |
286 | * @work: container of work to be done | |
ee443996 | 287 | * |
8a0dc95f | 288 | */ |
ee443996 | 289 | |
5503ac56 | 290 | static void p9_read_work(struct work_struct *work) |
8a0dc95f | 291 | { |
7594bf37 AV |
292 | __poll_t n; |
293 | int err; | |
5503ac56 | 294 | struct p9_conn *m; |
5503ac56 EVH |
295 | |
296 | m = container_of(work, struct p9_conn, rq); | |
8a0dc95f EVH |
297 | |
298 | if (m->err < 0) | |
299 | return; | |
300 | ||
947867aa | 301 | p9_debug(P9_DEBUG_TRANS, "start mux %p pos %zd\n", m, m->rc.offset); |
8a0dc95f | 302 | |
947867aa DM |
303 | if (!m->rc.sdata) { |
304 | m->rc.sdata = m->tmp_buf; | |
305 | m->rc.offset = 0; | |
306 | m->rc.capacity = 7; /* start by reading header */ | |
8a0dc95f EVH |
307 | } |
308 | ||
5503ac56 | 309 | clear_bit(Rpending, &m->wsched); |
947867aa DM |
310 | p9_debug(P9_DEBUG_TRANS, "read mux %p pos %zd size: %zd = %zd\n", |
311 | m, m->rc.offset, m->rc.capacity, | |
312 | m->rc.capacity - m->rc.offset); | |
313 | err = p9_fd_read(m->client, m->rc.sdata + m->rc.offset, | |
314 | m->rc.capacity - m->rc.offset); | |
5d385153 | 315 | p9_debug(P9_DEBUG_TRANS, "mux %p got %d bytes\n", m, err); |
947867aa | 316 | if (err == -EAGAIN) |
0462194d | 317 | goto end_clear; |
8a0dc95f | 318 | |
5503ac56 EVH |
319 | if (err <= 0) |
320 | goto error; | |
321 | ||
947867aa | 322 | m->rc.offset += err; |
1b0a763b | 323 | |
947867aa | 324 | /* header read in */ |
6d35190f | 325 | if ((!m->rreq) && (m->rc.offset == m->rc.capacity)) { |
5d385153 | 326 | p9_debug(P9_DEBUG_TRANS, "got new header\n"); |
1b0a763b | 327 | |
f984579a TB |
328 | /* Header size */ |
329 | m->rc.size = 7; | |
330 | err = p9_parse_header(&m->rc, &m->rc.size, NULL, NULL, 0); | |
947867aa DM |
331 | if (err) { |
332 | p9_debug(P9_DEBUG_ERROR, | |
333 | "error parsing header: %d\n", err); | |
334 | goto error; | |
335 | } | |
336 | ||
337 | if (m->rc.size >= m->client->msize) { | |
5d385153 | 338 | p9_debug(P9_DEBUG_ERROR, |
947867aa DM |
339 | "requested packet size too big: %d\n", |
340 | m->rc.size); | |
5503ac56 EVH |
341 | err = -EIO; |
342 | goto error; | |
343 | } | |
344 | ||
5d385153 | 345 | p9_debug(P9_DEBUG_TRANS, |
947867aa DM |
346 | "mux %p pkt: size: %d bytes tag: %d\n", |
347 | m, m->rc.size, m->rc.tag); | |
1b0a763b | 348 | |
6d35190f TB |
349 | m->rreq = p9_tag_lookup(m->client, m->rc.tag); |
350 | if (!m->rreq || (m->rreq->status != REQ_STATUS_SENT)) { | |
5d385153 | 351 | p9_debug(P9_DEBUG_ERROR, "Unexpected packet tag %d\n", |
947867aa | 352 | m->rc.tag); |
1b0a763b EVH |
353 | err = -EIO; |
354 | goto error; | |
355 | } | |
356 | ||
6d35190f | 357 | if (!m->rreq->rc.sdata) { |
3053600e DM |
358 | p9_debug(P9_DEBUG_ERROR, |
359 | "No recv fcall for tag %d (req %p), disconnecting!\n", | |
6d35190f TB |
360 | m->rc.tag, m->rreq); |
361 | m->rreq = NULL; | |
3053600e DM |
362 | err = -EIO; |
363 | goto error; | |
1b0a763b | 364 | } |
6d35190f | 365 | m->rc.sdata = m->rreq->rc.sdata; |
947867aa DM |
366 | memcpy(m->rc.sdata, m->tmp_buf, m->rc.capacity); |
367 | m->rc.capacity = m->rc.size; | |
1b0a763b | 368 | } |
5503ac56 | 369 | |
947867aa DM |
370 | /* packet is read in |
371 | * not an else because some packets (like clunk) have no payload | |
372 | */ | |
6d35190f | 373 | if ((m->rreq) && (m->rc.offset == m->rc.capacity)) { |
5d385153 | 374 | p9_debug(P9_DEBUG_TRANS, "got new packet\n"); |
6d35190f | 375 | m->rreq->rc.size = m->rc.offset; |
7eb923b8 | 376 | spin_lock(&m->client->lock); |
e4ca13f7 DM |
377 | if (m->rreq->status == REQ_STATUS_SENT) { |
378 | list_del(&m->rreq->req_list); | |
379 | p9_client_cb(m->client, m->rreq, REQ_STATUS_RCVD); | |
380 | } else { | |
381 | spin_unlock(&m->client->lock); | |
382 | p9_debug(P9_DEBUG_ERROR, | |
383 | "Request tag %d errored out while we were reading the reply\n", | |
384 | m->rc.tag); | |
385 | err = -EIO; | |
386 | goto error; | |
387 | } | |
9f476d7c | 388 | spin_unlock(&m->client->lock); |
947867aa DM |
389 | m->rc.sdata = NULL; |
390 | m->rc.offset = 0; | |
391 | m->rc.capacity = 0; | |
6d35190f TB |
392 | p9_req_put(m->rreq); |
393 | m->rreq = NULL; | |
5503ac56 EVH |
394 | } |
395 | ||
0462194d SD |
396 | end_clear: |
397 | clear_bit(Rworksched, &m->wsched); | |
398 | ||
5503ac56 EVH |
399 | if (!list_empty(&m->req_list)) { |
400 | if (test_and_clear_bit(Rpending, &m->wsched)) | |
a9a08845 | 401 | n = EPOLLIN; |
5503ac56 | 402 | else |
7594bf37 | 403 | n = p9_fd_poll(m->client, NULL, NULL); |
5503ac56 | 404 | |
a9a08845 | 405 | if ((n & EPOLLIN) && !test_and_set_bit(Rworksched, &m->wsched)) { |
5d385153 | 406 | p9_debug(P9_DEBUG_TRANS, "sched read work %p\n", m); |
61edeeed | 407 | schedule_work(&m->rq); |
0462194d SD |
408 | } |
409 | } | |
5503ac56 EVH |
410 | |
411 | return; | |
5503ac56 EVH |
412 | error: |
413 | p9_conn_cancel(m, err); | |
414 | clear_bit(Rworksched, &m->wsched); | |
415 | } | |
416 | ||
417 | /** | |
418 | * p9_fd_write - write to a socket | |
419 | * @client: client instance | |
420 | * @v: buffer to send data from | |
421 | * @len: size of send buffer | |
ee443996 | 422 | * |
8a0dc95f | 423 | */ |
ee443996 | 424 | |
5503ac56 | 425 | static int p9_fd_write(struct p9_client *client, void *v, int len) |
8a0dc95f | 426 | { |
670986ec | 427 | ssize_t ret; |
5503ac56 | 428 | struct p9_trans_fd *ts = NULL; |
8a0dc95f | 429 | |
5503ac56 EVH |
430 | if (client && client->status != Disconnected) |
431 | ts = client->trans; | |
8a0dc95f | 432 | |
5503ac56 EVH |
433 | if (!ts) |
434 | return -EREMOTEIO; | |
8a0dc95f | 435 | |
5503ac56 | 436 | if (!(ts->wr->f_flags & O_NONBLOCK)) |
5d385153 | 437 | p9_debug(P9_DEBUG_ERROR, "blocking write ...\n"); |
992b3f1d | 438 | |
670986ec | 439 | ret = kernel_write(ts->wr, v, len, &ts->wr->f_pos); |
5503ac56 EVH |
440 | if (ret <= 0 && ret != -ERESTARTSYS && ret != -EAGAIN) |
441 | client->status = Disconnected; | |
442 | return ret; | |
8a0dc95f EVH |
443 | } |
444 | ||
445 | /** | |
446 | * p9_write_work - called when a transport can send some data | |
ee443996 EVH |
447 | * @work: container for work to be done |
448 | * | |
8a0dc95f | 449 | */ |
ee443996 | 450 | |
8a0dc95f EVH |
451 | static void p9_write_work(struct work_struct *work) |
452 | { | |
7594bf37 AV |
453 | __poll_t n; |
454 | int err; | |
8a0dc95f | 455 | struct p9_conn *m; |
673d62cd | 456 | struct p9_req_t *req; |
8a0dc95f EVH |
457 | |
458 | m = container_of(work, struct p9_conn, wq); | |
459 | ||
460 | if (m->err < 0) { | |
461 | clear_bit(Wworksched, &m->wsched); | |
462 | return; | |
463 | } | |
464 | ||
465 | if (!m->wsize) { | |
759f4298 | 466 | spin_lock(&m->client->lock); |
8a0dc95f EVH |
467 | if (list_empty(&m->unsent_req_list)) { |
468 | clear_bit(Wworksched, &m->wsched); | |
759f4298 | 469 | spin_unlock(&m->client->lock); |
8a0dc95f EVH |
470 | return; |
471 | } | |
472 | ||
673d62cd | 473 | req = list_entry(m->unsent_req_list.next, struct p9_req_t, |
8a0dc95f | 474 | req_list); |
673d62cd | 475 | req->status = REQ_STATUS_SENT; |
5d385153 | 476 | p9_debug(P9_DEBUG_TRANS, "move req %p\n", req); |
8a0dc95f | 477 | list_move_tail(&req->req_list, &m->req_list); |
8a0dc95f | 478 | |
523adb6c DM |
479 | m->wbuf = req->tc.sdata; |
480 | m->wsize = req->tc.size; | |
8a0dc95f | 481 | m->wpos = 0; |
728356de TB |
482 | p9_req_get(req); |
483 | m->wreq = req; | |
673d62cd | 484 | spin_unlock(&m->client->lock); |
8a0dc95f EVH |
485 | } |
486 | ||
5d385153 JP |
487 | p9_debug(P9_DEBUG_TRANS, "mux %p pos %d size %d\n", |
488 | m, m->wpos, m->wsize); | |
8a0dc95f | 489 | clear_bit(Wpending, &m->wsched); |
8b81ef58 | 490 | err = p9_fd_write(m->client, m->wbuf + m->wpos, m->wsize - m->wpos); |
5d385153 | 491 | p9_debug(P9_DEBUG_TRANS, "mux %p sent %d bytes\n", m, err); |
584a8c13 SD |
492 | if (err == -EAGAIN) |
493 | goto end_clear; | |
494 | ||
8a0dc95f EVH |
495 | |
496 | if (err < 0) | |
497 | goto error; | |
498 | else if (err == 0) { | |
499 | err = -EREMOTEIO; | |
500 | goto error; | |
501 | } | |
502 | ||
503 | m->wpos += err; | |
728356de | 504 | if (m->wpos == m->wsize) { |
8a0dc95f | 505 | m->wpos = m->wsize = 0; |
728356de TB |
506 | p9_req_put(m->wreq); |
507 | m->wreq = NULL; | |
508 | } | |
8a0dc95f | 509 | |
584a8c13 SD |
510 | end_clear: |
511 | clear_bit(Wworksched, &m->wsched); | |
512 | ||
1957b3a8 | 513 | if (m->wsize || !list_empty(&m->unsent_req_list)) { |
8a0dc95f | 514 | if (test_and_clear_bit(Wpending, &m->wsched)) |
a9a08845 | 515 | n = EPOLLOUT; |
8a0dc95f | 516 | else |
7594bf37 | 517 | n = p9_fd_poll(m->client, NULL, NULL); |
8a0dc95f | 518 | |
a9a08845 | 519 | if ((n & EPOLLOUT) && |
584a8c13 | 520 | !test_and_set_bit(Wworksched, &m->wsched)) { |
5d385153 | 521 | p9_debug(P9_DEBUG_TRANS, "sched write work %p\n", m); |
61edeeed | 522 | schedule_work(&m->wq); |
584a8c13 SD |
523 | } |
524 | } | |
8a0dc95f EVH |
525 | |
526 | return; | |
527 | ||
528 | error: | |
529 | p9_conn_cancel(m, err); | |
530 | clear_bit(Wworksched, &m->wsched); | |
531 | } | |
532 | ||
ac6424b9 | 533 | static int p9_pollwake(wait_queue_entry_t *wait, unsigned int mode, int sync, void *key) |
8a0dc95f | 534 | { |
5503ac56 EVH |
535 | struct p9_poll_wait *pwait = |
536 | container_of(wait, struct p9_poll_wait, wait); | |
537 | struct p9_conn *m = pwait->conn; | |
538 | unsigned long flags; | |
8a0dc95f | 539 | |
5503ac56 EVH |
540 | spin_lock_irqsave(&p9_poll_lock, flags); |
541 | if (list_empty(&m->poll_pending_link)) | |
542 | list_add_tail(&m->poll_pending_link, &p9_poll_pending_list); | |
543 | spin_unlock_irqrestore(&p9_poll_lock, flags); | |
8a0dc95f | 544 | |
aa70c585 TH |
545 | schedule_work(&p9_poll_work); |
546 | return 1; | |
8a0dc95f EVH |
547 | } |
548 | ||
549 | /** | |
5503ac56 EVH |
550 | * p9_pollwait - add poll task to the wait queue |
551 | * @filp: file pointer being polled | |
552 | * @wait_address: wait_q to block on | |
553 | * @p: poll state | |
ee443996 | 554 | * |
5503ac56 | 555 | * called by files poll operation to add v9fs-poll task to files wait queue |
8a0dc95f | 556 | */ |
ee443996 | 557 | |
5503ac56 EVH |
558 | static void |
559 | p9_pollwait(struct file *filp, wait_queue_head_t *wait_address, poll_table *p) | |
8a0dc95f | 560 | { |
5503ac56 EVH |
561 | struct p9_conn *m = container_of(p, struct p9_conn, pt); |
562 | struct p9_poll_wait *pwait = NULL; | |
563 | int i; | |
8a0dc95f | 564 | |
5503ac56 EVH |
565 | for (i = 0; i < ARRAY_SIZE(m->poll_wait); i++) { |
566 | if (m->poll_wait[i].wait_addr == NULL) { | |
567 | pwait = &m->poll_wait[i]; | |
568 | break; | |
8a0dc95f | 569 | } |
8a0dc95f EVH |
570 | } |
571 | ||
5503ac56 | 572 | if (!pwait) { |
5d385153 | 573 | p9_debug(P9_DEBUG_ERROR, "not enough wait_address slots\n"); |
8a0dc95f EVH |
574 | return; |
575 | } | |
576 | ||
5503ac56 EVH |
577 | pwait->conn = m; |
578 | pwait->wait_addr = wait_address; | |
579 | init_waitqueue_func_entry(&pwait->wait, p9_pollwake); | |
580 | add_wait_queue(wait_address, &pwait->wait); | |
581 | } | |
8a0dc95f | 582 | |
5503ac56 | 583 | /** |
263c5828 | 584 | * p9_conn_create - initialize the per-session mux data |
5503ac56 EVH |
585 | * @client: client instance |
586 | * | |
587 | * Note: Creates the polling task if this is the first session. | |
588 | */ | |
8a0dc95f | 589 | |
263c5828 | 590 | static void p9_conn_create(struct p9_client *client) |
5503ac56 | 591 | { |
7594bf37 | 592 | __poll_t n; |
263c5828 SD |
593 | struct p9_trans_fd *ts = client->trans; |
594 | struct p9_conn *m = &ts->conn; | |
8a0dc95f | 595 | |
5d385153 | 596 | p9_debug(P9_DEBUG_TRANS, "client %p msize %d\n", client, client->msize); |
8a0dc95f | 597 | |
5503ac56 EVH |
598 | INIT_LIST_HEAD(&m->mux_list); |
599 | m->client = client; | |
8a0dc95f | 600 | |
5503ac56 EVH |
601 | INIT_LIST_HEAD(&m->req_list); |
602 | INIT_LIST_HEAD(&m->unsent_req_list); | |
603 | INIT_WORK(&m->rq, p9_read_work); | |
604 | INIT_WORK(&m->wq, p9_write_work); | |
605 | INIT_LIST_HEAD(&m->poll_pending_link); | |
606 | init_poll_funcptr(&m->pt, p9_pollwait); | |
8a0dc95f | 607 | |
7594bf37 | 608 | n = p9_fd_poll(client, &m->pt, NULL); |
a9a08845 | 609 | if (n & EPOLLIN) { |
5d385153 | 610 | p9_debug(P9_DEBUG_TRANS, "mux %p can read\n", m); |
5503ac56 EVH |
611 | set_bit(Rpending, &m->wsched); |
612 | } | |
8a0dc95f | 613 | |
a9a08845 | 614 | if (n & EPOLLOUT) { |
5d385153 | 615 | p9_debug(P9_DEBUG_TRANS, "mux %p can write\n", m); |
5503ac56 EVH |
616 | set_bit(Wpending, &m->wsched); |
617 | } | |
5503ac56 | 618 | } |
8a0dc95f | 619 | |
5503ac56 EVH |
620 | /** |
621 | * p9_poll_mux - polls a mux and schedules read or write works if necessary | |
622 | * @m: connection to poll | |
623 | * | |
624 | */ | |
625 | ||
626 | static void p9_poll_mux(struct p9_conn *m) | |
627 | { | |
7594bf37 AV |
628 | __poll_t n; |
629 | int err = -ECONNRESET; | |
5503ac56 EVH |
630 | |
631 | if (m->err < 0) | |
632 | return; | |
633 | ||
7594bf37 | 634 | n = p9_fd_poll(m->client, NULL, &err); |
a9a08845 | 635 | if (n & (EPOLLERR | EPOLLHUP | EPOLLNVAL)) { |
5d385153 | 636 | p9_debug(P9_DEBUG_TRANS, "error mux %p err %d\n", m, n); |
7594bf37 | 637 | p9_conn_cancel(m, err); |
5503ac56 EVH |
638 | } |
639 | ||
a9a08845 | 640 | if (n & EPOLLIN) { |
5503ac56 | 641 | set_bit(Rpending, &m->wsched); |
5d385153 | 642 | p9_debug(P9_DEBUG_TRANS, "mux %p can read\n", m); |
5503ac56 | 643 | if (!test_and_set_bit(Rworksched, &m->wsched)) { |
5d385153 | 644 | p9_debug(P9_DEBUG_TRANS, "sched read work %p\n", m); |
61edeeed | 645 | schedule_work(&m->rq); |
5503ac56 EVH |
646 | } |
647 | } | |
8a0dc95f | 648 | |
a9a08845 | 649 | if (n & EPOLLOUT) { |
5503ac56 | 650 | set_bit(Wpending, &m->wsched); |
5d385153 | 651 | p9_debug(P9_DEBUG_TRANS, "mux %p can write\n", m); |
f64f9e71 JP |
652 | if ((m->wsize || !list_empty(&m->unsent_req_list)) && |
653 | !test_and_set_bit(Wworksched, &m->wsched)) { | |
5d385153 | 654 | p9_debug(P9_DEBUG_TRANS, "sched write work %p\n", m); |
61edeeed | 655 | schedule_work(&m->wq); |
5503ac56 EVH |
656 | } |
657 | } | |
8a0dc95f EVH |
658 | } |
659 | ||
660 | /** | |
91b8534f | 661 | * p9_fd_request - send 9P request |
8a0dc95f EVH |
662 | * The function can sleep until the request is scheduled for sending. |
663 | * The function can be interrupted. Return from the function is not | |
91b8534f | 664 | * a guarantee that the request is sent successfully. |
8a0dc95f | 665 | * |
91b8534f EVH |
666 | * @client: client instance |
667 | * @req: request to be sent | |
ee443996 | 668 | * |
8a0dc95f | 669 | */ |
ee443996 | 670 | |
91b8534f | 671 | static int p9_fd_request(struct p9_client *client, struct p9_req_t *req) |
8a0dc95f | 672 | { |
7594bf37 | 673 | __poll_t n; |
91b8534f | 674 | struct p9_trans_fd *ts = client->trans; |
263c5828 | 675 | struct p9_conn *m = &ts->conn; |
8a0dc95f | 676 | |
5d385153 | 677 | p9_debug(P9_DEBUG_TRANS, "mux %p task %p tcall %p id %d\n", |
523adb6c | 678 | m, current, &req->tc, req->tc.id); |
8a0dc95f | 679 | if (m->err < 0) |
91b8534f | 680 | return m->err; |
8a0dc95f | 681 | |
91b8534f | 682 | spin_lock(&client->lock); |
7eb923b8 | 683 | req->status = REQ_STATUS_UNSENT; |
8a0dc95f | 684 | list_add_tail(&req->req_list, &m->unsent_req_list); |
91b8534f | 685 | spin_unlock(&client->lock); |
8a0dc95f EVH |
686 | |
687 | if (test_and_clear_bit(Wpending, &m->wsched)) | |
a9a08845 | 688 | n = EPOLLOUT; |
8a0dc95f | 689 | else |
7594bf37 | 690 | n = p9_fd_poll(m->client, NULL, NULL); |
8a0dc95f | 691 | |
a9a08845 | 692 | if (n & EPOLLOUT && !test_and_set_bit(Wworksched, &m->wsched)) |
61edeeed | 693 | schedule_work(&m->wq); |
8a0dc95f | 694 | |
91b8534f | 695 | return 0; |
8a0dc95f EVH |
696 | } |
697 | ||
91b8534f | 698 | static int p9_fd_cancel(struct p9_client *client, struct p9_req_t *req) |
8a0dc95f | 699 | { |
7eb923b8 | 700 | int ret = 1; |
8a0dc95f | 701 | |
5d385153 | 702 | p9_debug(P9_DEBUG_TRANS, "client %p req %p\n", client, req); |
8a0dc95f | 703 | |
91b8534f | 704 | spin_lock(&client->lock); |
91b8534f | 705 | |
91b8534f | 706 | if (req->status == REQ_STATUS_UNSENT) { |
1bab88b2 | 707 | list_del(&req->req_list); |
91b8534f | 708 | req->status = REQ_STATUS_FLSHD; |
728356de | 709 | p9_req_put(req); |
7eb923b8 | 710 | ret = 0; |
0bfd6845 | 711 | } |
7eb923b8 EVH |
712 | spin_unlock(&client->lock); |
713 | ||
714 | return ret; | |
8a0dc95f EVH |
715 | } |
716 | ||
afd8d654 SD |
717 | static int p9_fd_cancelled(struct p9_client *client, struct p9_req_t *req) |
718 | { | |
719 | p9_debug(P9_DEBUG_TRANS, "client %p req %p\n", client, req); | |
720 | ||
721 | /* we haven't received a response for oldreq, | |
722 | * remove it from the list. | |
723 | */ | |
724 | spin_lock(&client->lock); | |
725 | list_del(&req->req_list); | |
726 | spin_unlock(&client->lock); | |
728356de | 727 | p9_req_put(req); |
afd8d654 SD |
728 | |
729 | return 0; | |
730 | } | |
731 | ||
c4fac910 DH |
732 | static int p9_fd_show_options(struct seq_file *m, struct p9_client *clnt) |
733 | { | |
734 | if (clnt->trans_mod == &p9_tcp_trans) { | |
735 | if (clnt->trans_opts.tcp.port != P9_PORT) | |
61b272c3 | 736 | seq_printf(m, ",port=%u", clnt->trans_opts.tcp.port); |
c4fac910 DH |
737 | } else if (clnt->trans_mod == &p9_fd_trans) { |
738 | if (clnt->trans_opts.fd.rfd != ~0) | |
61b272c3 | 739 | seq_printf(m, ",rfd=%u", clnt->trans_opts.fd.rfd); |
c4fac910 | 740 | if (clnt->trans_opts.fd.wfd != ~0) |
61b272c3 | 741 | seq_printf(m, ",wfd=%u", clnt->trans_opts.fd.wfd); |
c4fac910 DH |
742 | } |
743 | return 0; | |
744 | } | |
745 | ||
a80d923e | 746 | /** |
0e15597e AK |
747 | * parse_opts - parse mount options into p9_fd_opts structure |
748 | * @params: options string passed from mount | |
749 | * @opts: fd transport-specific structure to parse options into | |
a80d923e | 750 | * |
bb8ffdfc | 751 | * Returns 0 upon success, -ERRNO upon failure |
a80d923e | 752 | */ |
bd238fb4 | 753 | |
bb8ffdfc | 754 | static int parse_opts(char *params, struct p9_fd_opts *opts) |
bd238fb4 | 755 | { |
a80d923e EVH |
756 | char *p; |
757 | substring_t args[MAX_OPT_ARGS]; | |
758 | int option; | |
d8c8a9e3 | 759 | char *options, *tmp_options; |
bd238fb4 | 760 | |
a80d923e EVH |
761 | opts->port = P9_PORT; |
762 | opts->rfd = ~0; | |
763 | opts->wfd = ~0; | |
c4fac910 | 764 | opts->privport = false; |
bd238fb4 | 765 | |
bb8ffdfc EVH |
766 | if (!params) |
767 | return 0; | |
768 | ||
d8c8a9e3 EVH |
769 | tmp_options = kstrdup(params, GFP_KERNEL); |
770 | if (!tmp_options) { | |
5d385153 JP |
771 | p9_debug(P9_DEBUG_ERROR, |
772 | "failed to allocate copy of option string\n"); | |
bb8ffdfc EVH |
773 | return -ENOMEM; |
774 | } | |
d8c8a9e3 | 775 | options = tmp_options; |
bd238fb4 | 776 | |
a80d923e EVH |
777 | while ((p = strsep(&options, ",")) != NULL) { |
778 | int token; | |
bb8ffdfc | 779 | int r; |
a80d923e EVH |
780 | if (!*p) |
781 | continue; | |
782 | token = match_token(p, tokens, args); | |
2f28c8b3 | 783 | if ((token != Opt_err) && (token != Opt_privport)) { |
15da4b16 AK |
784 | r = match_int(&args[0], &option); |
785 | if (r < 0) { | |
5d385153 JP |
786 | p9_debug(P9_DEBUG_ERROR, |
787 | "integer field, but no integer?\n"); | |
15da4b16 AK |
788 | continue; |
789 | } | |
a80d923e EVH |
790 | } |
791 | switch (token) { | |
792 | case Opt_port: | |
793 | opts->port = option; | |
794 | break; | |
795 | case Opt_rfdno: | |
796 | opts->rfd = option; | |
797 | break; | |
798 | case Opt_wfdno: | |
799 | opts->wfd = option; | |
800 | break; | |
2f28c8b3 | 801 | case Opt_privport: |
c4fac910 | 802 | opts->privport = true; |
2f28c8b3 | 803 | break; |
a80d923e EVH |
804 | default: |
805 | continue; | |
806 | } | |
bd238fb4 | 807 | } |
d8c8a9e3 EVH |
808 | |
809 | kfree(tmp_options); | |
bb8ffdfc | 810 | return 0; |
bd238fb4 | 811 | } |
bd238fb4 | 812 | |
8b81ef58 | 813 | static int p9_fd_open(struct p9_client *client, int rfd, int wfd) |
bd238fb4 | 814 | { |
263c5828 | 815 | struct p9_trans_fd *ts = kzalloc(sizeof(struct p9_trans_fd), |
a80d923e EVH |
816 | GFP_KERNEL); |
817 | if (!ts) | |
818 | return -ENOMEM; | |
bd238fb4 | 819 | |
a80d923e EVH |
820 | ts->rd = fget(rfd); |
821 | ts->wr = fget(wfd); | |
822 | if (!ts->rd || !ts->wr) { | |
823 | if (ts->rd) | |
824 | fput(ts->rd); | |
825 | if (ts->wr) | |
826 | fput(ts->wr); | |
827 | kfree(ts); | |
828 | return -EIO; | |
bd238fb4 LI |
829 | } |
830 | ||
8b81ef58 EVH |
831 | client->trans = ts; |
832 | client->status = Connected; | |
bd238fb4 | 833 | |
a80d923e | 834 | return 0; |
bd238fb4 | 835 | } |
bd238fb4 | 836 | |
8b81ef58 | 837 | static int p9_socket_open(struct p9_client *client, struct socket *csocket) |
bd238fb4 | 838 | { |
6b18662e | 839 | struct p9_trans_fd *p; |
56b31d1c | 840 | struct file *file; |
6b18662e | 841 | |
263c5828 | 842 | p = kzalloc(sizeof(struct p9_trans_fd), GFP_KERNEL); |
6b18662e AV |
843 | if (!p) |
844 | return -ENOMEM; | |
bd238fb4 LI |
845 | |
846 | csocket->sk->sk_allocation = GFP_NOIO; | |
aab174f0 | 847 | file = sock_alloc_file(csocket, 0, NULL); |
56b31d1c | 848 | if (IS_ERR(file)) { |
5d385153 JP |
849 | pr_err("%s (%d): failed to map fd\n", |
850 | __func__, task_pid_nr(current)); | |
6b18662e | 851 | kfree(p); |
56b31d1c | 852 | return PTR_ERR(file); |
bd238fb4 LI |
853 | } |
854 | ||
56b31d1c AV |
855 | get_file(file); |
856 | p->wr = p->rd = file; | |
6b18662e AV |
857 | client->trans = p; |
858 | client->status = Connected; | |
859 | ||
6b18662e AV |
860 | p->rd->f_flags |= O_NONBLOCK; |
861 | ||
263c5828 | 862 | p9_conn_create(client); |
bd238fb4 LI |
863 | return 0; |
864 | } | |
865 | ||
bd238fb4 | 866 | /** |
263c5828 | 867 | * p9_mux_destroy - cancels all pending requests of mux |
5503ac56 | 868 | * @m: mux to destroy |
bd238fb4 LI |
869 | * |
870 | */ | |
ee443996 | 871 | |
5503ac56 | 872 | static void p9_conn_destroy(struct p9_conn *m) |
bd238fb4 | 873 | { |
5d385153 JP |
874 | p9_debug(P9_DEBUG_TRANS, "mux %p prev %p next %p\n", |
875 | m, m->mux_list.prev, m->mux_list.next); | |
bd238fb4 | 876 | |
5503ac56 EVH |
877 | p9_mux_poll_stop(m); |
878 | cancel_work_sync(&m->rq); | |
fb488fc1 DM |
879 | if (m->rreq) { |
880 | p9_req_put(m->rreq); | |
881 | m->rreq = NULL; | |
882 | } | |
5503ac56 | 883 | cancel_work_sync(&m->wq); |
fb488fc1 DM |
884 | if (m->wreq) { |
885 | p9_req_put(m->wreq); | |
886 | m->wreq = NULL; | |
887 | } | |
bd238fb4 | 888 | |
5503ac56 | 889 | p9_conn_cancel(m, -ECONNRESET); |
bd238fb4 | 890 | |
5503ac56 | 891 | m->client = NULL; |
bd238fb4 LI |
892 | } |
893 | ||
894 | /** | |
8b81ef58 EVH |
895 | * p9_fd_close - shutdown file descriptor transport |
896 | * @client: client instance | |
bd238fb4 LI |
897 | * |
898 | */ | |
ee443996 | 899 | |
8b81ef58 | 900 | static void p9_fd_close(struct p9_client *client) |
bd238fb4 LI |
901 | { |
902 | struct p9_trans_fd *ts; | |
903 | ||
8b81ef58 | 904 | if (!client) |
bd238fb4 LI |
905 | return; |
906 | ||
8b81ef58 | 907 | ts = client->trans; |
bd238fb4 LI |
908 | if (!ts) |
909 | return; | |
910 | ||
8b81ef58 EVH |
911 | client->status = Disconnected; |
912 | ||
263c5828 | 913 | p9_conn_destroy(&ts->conn); |
8a0dc95f | 914 | |
bd238fb4 LI |
915 | if (ts->rd) |
916 | fput(ts->rd); | |
917 | if (ts->wr) | |
918 | fput(ts->wr); | |
8b81ef58 | 919 | |
bd238fb4 LI |
920 | kfree(ts); |
921 | } | |
922 | ||
887b3ece EVH |
923 | /* |
924 | * stolen from NFS - maybe should be made a generic function? | |
925 | */ | |
926 | static inline int valid_ipaddr4(const char *buf) | |
927 | { | |
928 | int rc, count, in[4]; | |
929 | ||
930 | rc = sscanf(buf, "%d.%d.%d.%d", &in[0], &in[1], &in[2], &in[3]); | |
931 | if (rc != 4) | |
932 | return -EINVAL; | |
933 | for (count = 0; count < 4; count++) { | |
934 | if (in[count] > 255) | |
935 | return -EINVAL; | |
936 | } | |
937 | return 0; | |
938 | } | |
939 | ||
2f28c8b3 JG |
940 | static int p9_bind_privport(struct socket *sock) |
941 | { | |
942 | struct sockaddr_in cl; | |
943 | int port, err = -EINVAL; | |
944 | ||
945 | memset(&cl, 0, sizeof(cl)); | |
946 | cl.sin_family = AF_INET; | |
947 | cl.sin_addr.s_addr = INADDR_ANY; | |
948 | for (port = p9_ipport_resv_max; port >= p9_ipport_resv_min; port--) { | |
949 | cl.sin_port = htons((ushort)port); | |
950 | err = kernel_bind(sock, (struct sockaddr *)&cl, sizeof(cl)); | |
951 | if (err != -EADDRINUSE) | |
952 | break; | |
953 | } | |
954 | return err; | |
955 | } | |
956 | ||
957 | ||
8b81ef58 EVH |
958 | static int |
959 | p9_fd_create_tcp(struct p9_client *client, const char *addr, char *args) | |
a80d923e EVH |
960 | { |
961 | int err; | |
a80d923e EVH |
962 | struct socket *csocket; |
963 | struct sockaddr_in sin_server; | |
964 | struct p9_fd_opts opts; | |
965 | ||
bb8ffdfc EVH |
966 | err = parse_opts(args, &opts); |
967 | if (err < 0) | |
8b81ef58 | 968 | return err; |
a80d923e | 969 | |
10aa1452 | 970 | if (addr == NULL || valid_ipaddr4(addr) < 0) |
8b81ef58 | 971 | return -EINVAL; |
887b3ece | 972 | |
a80d923e | 973 | csocket = NULL; |
a80d923e | 974 | |
c4fac910 DH |
975 | client->trans_opts.tcp.port = opts.port; |
976 | client->trans_opts.tcp.privport = opts.privport; | |
a80d923e EVH |
977 | sin_server.sin_family = AF_INET; |
978 | sin_server.sin_addr.s_addr = in_aton(addr); | |
979 | sin_server.sin_port = htons(opts.port); | |
0c5c9fb5 | 980 | err = __sock_create(current->nsproxy->net_ns, PF_INET, |
e75762fd | 981 | SOCK_STREAM, IPPROTO_TCP, &csocket, 1); |
6b18662e | 982 | if (err) { |
5d385153 JP |
983 | pr_err("%s (%d): problem creating socket\n", |
984 | __func__, task_pid_nr(current)); | |
6b18662e | 985 | return err; |
a80d923e EVH |
986 | } |
987 | ||
2f28c8b3 JG |
988 | if (opts.privport) { |
989 | err = p9_bind_privport(csocket); | |
990 | if (err < 0) { | |
991 | pr_err("%s (%d): problem binding to privport\n", | |
992 | __func__, task_pid_nr(current)); | |
993 | sock_release(csocket); | |
994 | return err; | |
995 | } | |
996 | } | |
997 | ||
a80d923e EVH |
998 | err = csocket->ops->connect(csocket, |
999 | (struct sockaddr *)&sin_server, | |
1000 | sizeof(struct sockaddr_in), 0); | |
1001 | if (err < 0) { | |
5d385153 JP |
1002 | pr_err("%s (%d): problem connecting socket to %s\n", |
1003 | __func__, task_pid_nr(current), addr); | |
a80d923e | 1004 | sock_release(csocket); |
6b18662e AV |
1005 | return err; |
1006 | } | |
a80d923e | 1007 | |
6b18662e | 1008 | return p9_socket_open(client, csocket); |
a80d923e EVH |
1009 | } |
1010 | ||
8b81ef58 EVH |
1011 | static int |
1012 | p9_fd_create_unix(struct p9_client *client, const char *addr, char *args) | |
a80d923e EVH |
1013 | { |
1014 | int err; | |
1015 | struct socket *csocket; | |
1016 | struct sockaddr_un sun_server; | |
a80d923e EVH |
1017 | |
1018 | csocket = NULL; | |
a80d923e | 1019 | |
10aa1452 TB |
1020 | if (addr == NULL) |
1021 | return -EINVAL; | |
1022 | ||
cff6b8a9 | 1023 | if (strlen(addr) >= UNIX_PATH_MAX) { |
5d385153 JP |
1024 | pr_err("%s (%d): address too long: %s\n", |
1025 | __func__, task_pid_nr(current), addr); | |
6b18662e | 1026 | return -ENAMETOOLONG; |
a80d923e EVH |
1027 | } |
1028 | ||
1029 | sun_server.sun_family = PF_UNIX; | |
1030 | strcpy(sun_server.sun_path, addr); | |
0c5c9fb5 | 1031 | err = __sock_create(current->nsproxy->net_ns, PF_UNIX, |
e75762fd | 1032 | SOCK_STREAM, 0, &csocket, 1); |
6b18662e | 1033 | if (err < 0) { |
5d385153 JP |
1034 | pr_err("%s (%d): problem creating socket\n", |
1035 | __func__, task_pid_nr(current)); | |
1036 | ||
6b18662e AV |
1037 | return err; |
1038 | } | |
a80d923e EVH |
1039 | err = csocket->ops->connect(csocket, (struct sockaddr *)&sun_server, |
1040 | sizeof(struct sockaddr_un) - 1, 0); | |
1041 | if (err < 0) { | |
5d385153 JP |
1042 | pr_err("%s (%d): problem connecting socket: %s: %d\n", |
1043 | __func__, task_pid_nr(current), addr, err); | |
a80d923e | 1044 | sock_release(csocket); |
6b18662e AV |
1045 | return err; |
1046 | } | |
a80d923e | 1047 | |
6b18662e | 1048 | return p9_socket_open(client, csocket); |
a80d923e EVH |
1049 | } |
1050 | ||
8b81ef58 EVH |
1051 | static int |
1052 | p9_fd_create(struct p9_client *client, const char *addr, char *args) | |
a80d923e EVH |
1053 | { |
1054 | int err; | |
a80d923e EVH |
1055 | struct p9_fd_opts opts; |
1056 | ||
1057 | parse_opts(args, &opts); | |
c4fac910 DH |
1058 | client->trans_opts.fd.rfd = opts.rfd; |
1059 | client->trans_opts.fd.wfd = opts.wfd; | |
a80d923e EVH |
1060 | |
1061 | if (opts.rfd == ~0 || opts.wfd == ~0) { | |
5d385153 | 1062 | pr_err("Insufficient options for proto=fd\n"); |
8b81ef58 | 1063 | return -ENOPROTOOPT; |
a80d923e EVH |
1064 | } |
1065 | ||
8b81ef58 | 1066 | err = p9_fd_open(client, opts.rfd, opts.wfd); |
a80d923e | 1067 | if (err < 0) |
6b18662e | 1068 | return err; |
a80d923e | 1069 | |
263c5828 | 1070 | p9_conn_create(client); |
8a0dc95f | 1071 | |
8b81ef58 | 1072 | return 0; |
a80d923e EVH |
1073 | } |
1074 | ||
1075 | static struct p9_trans_module p9_tcp_trans = { | |
1076 | .name = "tcp", | |
1077 | .maxsize = MAX_SOCK_BUF, | |
f94741fd | 1078 | .def = 0, |
8b81ef58 EVH |
1079 | .create = p9_fd_create_tcp, |
1080 | .close = p9_fd_close, | |
91b8534f EVH |
1081 | .request = p9_fd_request, |
1082 | .cancel = p9_fd_cancel, | |
afd8d654 | 1083 | .cancelled = p9_fd_cancelled, |
c4fac910 | 1084 | .show_options = p9_fd_show_options, |
72029fe8 | 1085 | .owner = THIS_MODULE, |
a80d923e EVH |
1086 | }; |
1087 | ||
1088 | static struct p9_trans_module p9_unix_trans = { | |
1089 | .name = "unix", | |
1090 | .maxsize = MAX_SOCK_BUF, | |
1091 | .def = 0, | |
8b81ef58 EVH |
1092 | .create = p9_fd_create_unix, |
1093 | .close = p9_fd_close, | |
91b8534f EVH |
1094 | .request = p9_fd_request, |
1095 | .cancel = p9_fd_cancel, | |
afd8d654 | 1096 | .cancelled = p9_fd_cancelled, |
c4fac910 | 1097 | .show_options = p9_fd_show_options, |
72029fe8 | 1098 | .owner = THIS_MODULE, |
a80d923e EVH |
1099 | }; |
1100 | ||
1101 | static struct p9_trans_module p9_fd_trans = { | |
1102 | .name = "fd", | |
1103 | .maxsize = MAX_SOCK_BUF, | |
1104 | .def = 0, | |
8b81ef58 EVH |
1105 | .create = p9_fd_create, |
1106 | .close = p9_fd_close, | |
91b8534f EVH |
1107 | .request = p9_fd_request, |
1108 | .cancel = p9_fd_cancel, | |
afd8d654 | 1109 | .cancelled = p9_fd_cancelled, |
c4fac910 | 1110 | .show_options = p9_fd_show_options, |
72029fe8 | 1111 | .owner = THIS_MODULE, |
a80d923e EVH |
1112 | }; |
1113 | ||
5503ac56 | 1114 | /** |
4a026da9 SL |
1115 | * p9_poll_workfn - poll worker thread |
1116 | * @work: work queue | |
5503ac56 EVH |
1117 | * |
1118 | * polls all v9fs transports for new events and queues the appropriate | |
1119 | * work to the work queue | |
1120 | * | |
1121 | */ | |
1122 | ||
aa70c585 | 1123 | static void p9_poll_workfn(struct work_struct *work) |
5503ac56 EVH |
1124 | { |
1125 | unsigned long flags; | |
1126 | ||
5d385153 | 1127 | p9_debug(P9_DEBUG_TRANS, "start %p\n", current); |
aa70c585 | 1128 | |
5503ac56 EVH |
1129 | spin_lock_irqsave(&p9_poll_lock, flags); |
1130 | while (!list_empty(&p9_poll_pending_list)) { | |
1131 | struct p9_conn *conn = list_first_entry(&p9_poll_pending_list, | |
1132 | struct p9_conn, | |
1133 | poll_pending_link); | |
1134 | list_del_init(&conn->poll_pending_link); | |
1135 | spin_unlock_irqrestore(&p9_poll_lock, flags); | |
1136 | ||
1137 | p9_poll_mux(conn); | |
1138 | ||
1139 | spin_lock_irqsave(&p9_poll_lock, flags); | |
1140 | } | |
1141 | spin_unlock_irqrestore(&p9_poll_lock, flags); | |
1142 | ||
5d385153 | 1143 | p9_debug(P9_DEBUG_TRANS, "finish\n"); |
5503ac56 EVH |
1144 | } |
1145 | ||
887b3ece | 1146 | int p9_trans_fd_init(void) |
a80d923e EVH |
1147 | { |
1148 | v9fs_register_trans(&p9_tcp_trans); | |
1149 | v9fs_register_trans(&p9_unix_trans); | |
1150 | v9fs_register_trans(&p9_fd_trans); | |
1151 | ||
3387b804 | 1152 | return 0; |
a80d923e | 1153 | } |
72029fe8 TH |
1154 | |
1155 | void p9_trans_fd_exit(void) | |
1156 | { | |
43829731 | 1157 | flush_work(&p9_poll_work); |
72029fe8 TH |
1158 | v9fs_unregister_trans(&p9_tcp_trans); |
1159 | v9fs_unregister_trans(&p9_unix_trans); | |
1160 | v9fs_unregister_trans(&p9_fd_trans); | |
1161 | } |