2 1e84c7b7 2022-01-10 op * Copyright (c) 2021, 2022 Omar Polo <op@omarpolo.com>
4 fb1a36c0 2022-01-09 op * Permission to use, copy, modify, and distribute this software for any
5 fb1a36c0 2022-01-09 op * purpose with or without fee is hereby granted, provided that the above
6 fb1a36c0 2022-01-09 op * copyright notice and this permission notice appear in all copies.
8 fb1a36c0 2022-01-09 op * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 fb1a36c0 2022-01-09 op * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 fb1a36c0 2022-01-09 op * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 fb1a36c0 2022-01-09 op * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 fb1a36c0 2022-01-09 op * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 fb1a36c0 2022-01-09 op * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 fb1a36c0 2022-01-09 op * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 bbcba3ed 2022-01-10 op #include "compat.h"
19 fb1a36c0 2022-01-09 op #include <sys/stat.h>
20 fb1a36c0 2022-01-09 op #include <sys/types.h>
21 fb1a36c0 2022-01-09 op #include <sys/uio.h>
23 fb1a36c0 2022-01-09 op #include <dirent.h>
24 fb1a36c0 2022-01-09 op #include <endian.h>
25 fb1a36c0 2022-01-09 op #include <errno.h>
26 fb1a36c0 2022-01-09 op #include <fcntl.h>
27 755d75bf 2022-01-17 op #include <inttypes.h>
28 755d75bf 2022-01-17 op #include <libgen.h>
29 fb1a36c0 2022-01-09 op #include <pwd.h>
30 fb1a36c0 2022-01-09 op #include <signal.h>
31 fb1a36c0 2022-01-09 op #include <stdint.h>
32 755d75bf 2022-01-17 op #include <stdio.h>
33 fb1a36c0 2022-01-09 op #include <stdlib.h>
34 fb1a36c0 2022-01-09 op #include <string.h>
35 fb1a36c0 2022-01-09 op #include <syslog.h>
36 fb1a36c0 2022-01-09 op #include <unistd.h>
38 fb1a36c0 2022-01-09 op #include "client.h"
39 fb1a36c0 2022-01-09 op #include "kami.h"
40 fb1a36c0 2022-01-09 op #include "kamid.h"
41 fb1a36c0 2022-01-09 op #include "log.h"
42 fb1a36c0 2022-01-09 op #include "sandbox.h"
43 fb1a36c0 2022-01-09 op #include "utils.h"
46 fb1a36c0 2022-01-09 op * XXX: atm is difficult to accept messages bigger than MAX_IMSGSIZE
47 fb1a36c0 2022-01-09 op * minus IMSG_HEADER_SIZE, we need something to split messages into
48 fb1a36c0 2022-01-09 op * chunks and receive them one by the other.
50 fb1a36c0 2022-01-09 op * CLIENT_MSIZE is thus the maximum message size we can handle now.
52 fb1a36c0 2022-01-09 op #define CLIENT_MSIZE (MAX_IMSGSIZE - IMSG_HEADER_SIZE)
54 fb1a36c0 2022-01-09 op #define DEBUG_PACKETS 0
56 fb1a36c0 2022-01-09 op /* straight outta /src/usr.bin/ssh/scp.c */
57 fb1a36c0 2022-01-09 op #define TYPE_OVERFLOW(type, val) \
58 fb1a36c0 2022-01-09 op ((sizeof(type) == 4 && (val) > INT32_MAX) || \
59 fb1a36c0 2022-01-09 op (sizeof(type) == 8 && (val) > INT64_MAX) || \
60 fb1a36c0 2022-01-09 op (sizeof(type) != 4 && sizeof(type) != 8))
62 fb1a36c0 2022-01-09 op STAILQ_HEAD(dirhead, dir) dirs;
66 fb1a36c0 2022-01-09 op STAILQ_ENTRY(dir) entries;
69 fb1a36c0 2022-01-09 op STAILQ_HEAD(fidhead, fid) fids;
73 46e4e74b 2022-01-17 op char fname[NAME_MAX];
76 fb1a36c0 2022-01-09 op * the flags passed to open(2). O_CLOEXEC means ORCLOSE, that
77 fb1a36c0 2022-01-09 op * is to unlink the file upon Tclunk.
82 fb1a36c0 2022-01-09 op * if fd is not -1 this fid was opened, fd represents its
83 fb1a36c0 2022-01-09 op * file descriptor and iomode the flags passed to open(2).
87 fb1a36c0 2022-01-09 op struct evbuffer *evb;
90 fb1a36c0 2022-01-09 op * expected offset for Tread against a directory.
92 fb1a36c0 2022-01-09 op uint64_t offset;
94 fb1a36c0 2022-01-09 op struct qid qid;
95 fb1a36c0 2022-01-09 op struct dir *dir;
96 fb1a36c0 2022-01-09 op STAILQ_ENTRY(fid) entries;
99 fb1a36c0 2022-01-09 op static struct imsgev *iev_listener;
100 fb1a36c0 2022-01-09 op static struct evbuffer *evb;
101 fb1a36c0 2022-01-09 op static uint32_t peerid;
103 fb1a36c0 2022-01-09 op static int handshaked;
104 fb1a36c0 2022-01-09 op uint32_t msize;
106 fb1a36c0 2022-01-09 op static __dead void client_shutdown(void);
107 fb1a36c0 2022-01-09 op static void client_sig_handler(int, short, void *);
108 fb1a36c0 2022-01-09 op static void client_dispatch_listener(int, short, void *);
109 fb1a36c0 2022-01-09 op static void client_privdrop(const char *, const char *);
111 5c69b561 2022-01-29 op static int client_send_listenerp(int, uint32_t, const void *, uint16_t);
112 fb1a36c0 2022-01-09 op static int client_send_listener(int, const void *, uint16_t);
114 fb1a36c0 2022-01-09 op static void qid_update_from_sb(struct qid *, struct stat *);
116 fb1a36c0 2022-01-09 op static struct dir *new_dir(int);
117 fb1a36c0 2022-01-09 op static struct dir *dir_incref(struct dir *);
118 fb1a36c0 2022-01-09 op static void dir_decref(struct dir *);
120 fb1a36c0 2022-01-09 op static struct fid *new_fid(struct dir *, uint32_t, const char *, struct qid *);
121 fb1a36c0 2022-01-09 op static struct fid *fid_by_id(uint32_t);
122 fb1a36c0 2022-01-09 op static void free_fid(struct fid *);
124 fb1a36c0 2022-01-09 op static void parse_message(const uint8_t *, size_t,
125 fb1a36c0 2022-01-09 op struct np_msg_header *, uint8_t **);
127 fb1a36c0 2022-01-09 op static void np_write16(struct evbuffer *, uint16_t);
128 fb1a36c0 2022-01-09 op static void np_write32(struct evbuffer *, uint32_t);
129 fb1a36c0 2022-01-09 op static void np_write64(struct evbuffer *, uint64_t);
130 fb1a36c0 2022-01-09 op static void np_header(uint32_t, uint8_t, uint16_t);
131 fb1a36c0 2022-01-09 op static void np_string(struct evbuffer *, uint16_t, const char *);
132 fb1a36c0 2022-01-09 op static void np_qid(struct evbuffer *, struct qid *);
133 fb1a36c0 2022-01-09 op static void do_send(void);
135 fb1a36c0 2022-01-09 op static void np_version(uint16_t, uint32_t, const char *);
136 fb1a36c0 2022-01-09 op static void np_attach(uint16_t, struct qid *);
137 fb1a36c0 2022-01-09 op static void np_clunk(uint16_t);
138 fb1a36c0 2022-01-09 op static void np_flush(uint16_t);
139 fb1a36c0 2022-01-09 op static void np_walk(uint16_t, int, struct qid *);
140 fb1a36c0 2022-01-09 op static void np_open(uint16_t, struct qid *, uint32_t);
141 fb1a36c0 2022-01-09 op static void np_create(uint16_t, struct qid *, uint32_t);
142 fb1a36c0 2022-01-09 op static void np_read(uint16_t, uint32_t, void *);
143 fb1a36c0 2022-01-09 op static void np_write(uint16_t, uint32_t);
144 70540bb5 2022-02-02 op static void np_stat(uint16_t, uint16_t, void *);
145 755d75bf 2022-01-17 op static void np_wstat(uint16_t);
146 fb1a36c0 2022-01-09 op static void np_remove(uint16_t);
147 fb1a36c0 2022-01-09 op static void np_error(uint16_t, const char *);
148 fb1a36c0 2022-01-09 op static void np_errno(uint16_t);
150 fb1a36c0 2022-01-09 op static int np_read8(const char *, const char *, uint8_t *,
151 fb1a36c0 2022-01-09 op const uint8_t **, size_t *);
152 fb1a36c0 2022-01-09 op static int np_read16(const char *, const char *, uint16_t *,
153 fb1a36c0 2022-01-09 op const uint8_t **, size_t *);
154 fb1a36c0 2022-01-09 op static int np_read32(const char *, const char *, uint32_t *,
155 fb1a36c0 2022-01-09 op const uint8_t **, size_t *);
156 fb1a36c0 2022-01-09 op static int np_read64(const char *, const char *, uint64_t *,
157 fb1a36c0 2022-01-09 op const uint8_t **, size_t *);
159 fb1a36c0 2022-01-09 op #define READSTRERR -1
160 fb1a36c0 2022-01-09 op #define READSTRTRUNC -2
161 fb1a36c0 2022-01-09 op static int np_readstr(const char *, const char *, char *, size_t,
162 fb1a36c0 2022-01-09 op const uint8_t **, size_t *);
164 755d75bf 2022-01-17 op static int np_readst(const char *, const char *, struct np_stat *,
165 755d75bf 2022-01-17 op char *, size_t, const uint8_t **, size_t *);
167 fb1a36c0 2022-01-09 op #define NPREAD8(f, dst, src, len) np_read8(__func__, f, dst, src, len)
168 fb1a36c0 2022-01-09 op #define NPREAD16(f, dst, src, len) np_read16(__func__, f, dst, src, len)
169 fb1a36c0 2022-01-09 op #define NPREAD32(f, dst, src, len) np_read32(__func__, f, dst, src, len)
170 fb1a36c0 2022-01-09 op #define NPREAD64(f, dst, src, len) np_read64(__func__, f, dst, src, len)
172 fb1a36c0 2022-01-09 op #define NPREADSTR(f, b, bl, src, len) np_readstr(__func__, f, b, bl, src, len)
174 755d75bf 2022-01-17 op #define NPREADST(f, dst, n, nl, src, len) np_readst(__func__, f, dst, n, nl, src, len)
176 fb1a36c0 2022-01-09 op static void tversion(struct np_msg_header *, const uint8_t *, size_t);
177 fb1a36c0 2022-01-09 op static void tattach(struct np_msg_header *, const uint8_t *, size_t);
178 fb1a36c0 2022-01-09 op static void tclunk(struct np_msg_header *, const uint8_t *, size_t);
179 fb1a36c0 2022-01-09 op static void tflush(struct np_msg_header *, const uint8_t *, size_t);
180 fb1a36c0 2022-01-09 op static void twalk(struct np_msg_header *, const uint8_t *, size_t);
181 fb1a36c0 2022-01-09 op static void topen(struct np_msg_header *, const uint8_t *, size_t);
182 fb1a36c0 2022-01-09 op static void tcreate(struct np_msg_header *, const uint8_t *, size_t);
183 fb1a36c0 2022-01-09 op static void tread(struct np_msg_header *, const uint8_t *, size_t);
184 fb1a36c0 2022-01-09 op static void twrite(struct np_msg_header *, const uint8_t *, size_t);
185 fb1a36c0 2022-01-09 op static void tstat(struct np_msg_header *, const uint8_t *, size_t);
186 755d75bf 2022-01-17 op static void twstat(struct np_msg_header *, const uint8_t *, size_t);
187 fb1a36c0 2022-01-09 op static void tremove(struct np_msg_header *, const uint8_t *, size_t);
188 fb1a36c0 2022-01-09 op static void handle_message(struct imsg *, size_t);
191 fb1a36c0 2022-01-09 op client(int debug, int verbose)
193 fb1a36c0 2022-01-09 op struct event ev_sigint, ev_sigterm;
195 fb1a36c0 2022-01-09 op log_init(debug, LOG_DAEMON);
196 fb1a36c0 2022-01-09 op log_setverbose(verbose);
198 fb1a36c0 2022-01-09 op setproctitle("client");
199 fb1a36c0 2022-01-09 op log_procinit("client");
201 fb1a36c0 2022-01-09 op log_debug("warming up");
203 fb1a36c0 2022-01-09 op event_init();
205 fb1a36c0 2022-01-09 op /* Setup signal handlers */
206 fb1a36c0 2022-01-09 op signal_set(&ev_sigint, SIGINT, client_sig_handler, NULL);
207 fb1a36c0 2022-01-09 op signal_set(&ev_sigterm, SIGTERM, client_sig_handler, NULL);
209 fb1a36c0 2022-01-09 op signal_add(&ev_sigint, NULL);
210 fb1a36c0 2022-01-09 op signal_add(&ev_sigterm, NULL);
212 fb1a36c0 2022-01-09 op signal(SIGPIPE, SIG_IGN);
213 fb1a36c0 2022-01-09 op signal(SIGHUP, SIG_IGN);
215 fb1a36c0 2022-01-09 op /* Setup pipe and event handler to the listener process */
216 fb1a36c0 2022-01-09 op if ((iev_listener = malloc(sizeof(*iev_listener))) == NULL)
219 fb1a36c0 2022-01-09 op imsg_init(&iev_listener->ibuf, 3);
220 fb1a36c0 2022-01-09 op iev_listener->handler = client_dispatch_listener;
222 fb1a36c0 2022-01-09 op /* Setup event handlers. */
223 fb1a36c0 2022-01-09 op iev_listener->events = EV_READ;
224 fb1a36c0 2022-01-09 op event_set(&iev_listener->ev, iev_listener->ibuf.fd,
225 fb1a36c0 2022-01-09 op iev_listener->events, iev_listener->handler, iev_listener);
226 fb1a36c0 2022-01-09 op event_add(&iev_listener->ev, NULL);
228 fb1a36c0 2022-01-09 op event_dispatch();
229 fb1a36c0 2022-01-09 op client_shutdown();
232 fb1a36c0 2022-01-09 op static __dead void
233 fb1a36c0 2022-01-09 op client_shutdown(void)
235 fb1a36c0 2022-01-09 op if (evb != NULL)
236 fb1a36c0 2022-01-09 op evbuffer_free(evb);
238 fb1a36c0 2022-01-09 op msgbuf_clear(&iev_listener->ibuf.w);
239 fb1a36c0 2022-01-09 op close(iev_listener->ibuf.fd);
241 fb1a36c0 2022-01-09 op free(iev_listener);
243 fb1a36c0 2022-01-09 op log_debug("client exiting");
248 fb1a36c0 2022-01-09 op client_sig_handler(int sig, short event, void *d)
251 fb1a36c0 2022-01-09 op * Normal signal handler rules don't apply because libevent
252 fb1a36c0 2022-01-09 op * decouples for us.
255 fb1a36c0 2022-01-09 op switch (sig) {
257 fb1a36c0 2022-01-09 op case SIGTERM:
258 fb1a36c0 2022-01-09 op client_shutdown();
260 fb1a36c0 2022-01-09 op fatalx("unexpected signal %d", sig);
265 fb1a36c0 2022-01-09 op client_dispatch_listener(int fd, short event, void *d)
267 1e84c7b7 2022-01-10 op static int auth = 0;
268 1e84c7b7 2022-01-10 op struct kd_auth_proc rauth;
269 5c69b561 2022-01-29 op struct kd_debug_info debug;
270 5c69b561 2022-01-29 op struct fid *f;
271 fb1a36c0 2022-01-09 op struct imsg imsg;
272 fb1a36c0 2022-01-09 op struct imsgev *iev = d;
273 fb1a36c0 2022-01-09 op struct imsgbuf *ibuf;
275 fb1a36c0 2022-01-09 op int shut = 0;
277 fb1a36c0 2022-01-09 op ibuf = &iev->ibuf;
279 fb1a36c0 2022-01-09 op if (event & EV_READ) {
280 fb1a36c0 2022-01-09 op if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN)
281 fb1a36c0 2022-01-09 op fatal("imsg_read error");
282 fb1a36c0 2022-01-09 op if (n == 0) /* Connection closed */
285 fb1a36c0 2022-01-09 op if (event & EV_WRITE) {
286 fb1a36c0 2022-01-09 op if ((n = msgbuf_write(&ibuf->w)) == -1 && errno != EAGAIN)
287 fb1a36c0 2022-01-09 op fatal("msgbuf_write");
288 fb1a36c0 2022-01-09 op if (n == 0) /* Connection closed */
293 fb1a36c0 2022-01-09 op if ((n = imsg_get(ibuf, &imsg)) == -1)
294 fb1a36c0 2022-01-09 op fatal("%s: imsg_get error", __func__);
295 fb1a36c0 2022-01-09 op if (n == 0) /* No more messages. */
298 fb1a36c0 2022-01-09 op switch (imsg.hdr.type) {
299 982f38dc 2022-01-23 op case IMSG_CTL_LOG_VERBOSE:
300 982f38dc 2022-01-23 op if (IMSG_DATA_SIZE(imsg) != sizeof(verbose))
301 982f38dc 2022-01-23 op fatalx("%s: IMSG_CTL_LOG_VERBOSE wrong size",
303 982f38dc 2022-01-23 op memcpy(&verbose, imsg.data, sizeof(verbose));
304 982f38dc 2022-01-23 op log_setverbose(verbose);
306 5c69b561 2022-01-29 op case IMSG_CTL_DEBUG:
307 5c69b561 2022-01-29 op STAILQ_FOREACH(f, &fids, entries) {
308 5c69b561 2022-01-29 op memset(&debug, 0, sizeof(debug));
309 5c69b561 2022-01-29 op debug.fid = f->fid;
310 5c69b561 2022-01-29 op strlcpy(debug.path, f->fname,
311 5c69b561 2022-01-29 op sizeof(debug.path));
312 5c69b561 2022-01-29 op client_send_listenerp(IMSG_CTL_DEBUG_BACK,
313 5c69b561 2022-01-29 op imsg.hdr.peerid, &debug, sizeof(debug));
315 5c69b561 2022-01-29 op client_send_listenerp(IMSG_CTL_DEBUG_END,
316 5c69b561 2022-01-29 op imsg.hdr.peerid, NULL, 0);
318 fb1a36c0 2022-01-09 op case IMSG_AUTH:
319 fb1a36c0 2022-01-09 op peerid = imsg.hdr.peerid;
321 fb1a36c0 2022-01-09 op fatalx("%s: IMSG_AUTH already done", __func__);
324 1e84c7b7 2022-01-10 op if (IMSG_DATA_SIZE(imsg) != sizeof(rauth))
325 1e84c7b7 2022-01-10 op fatalx("mismatching size for IMSG_AUTH");
326 1e84c7b7 2022-01-10 op memcpy(&rauth, imsg.data, sizeof(rauth));
327 1e84c7b7 2022-01-10 op if (rauth.uname[sizeof(rauth.uname)-1] != '\0' ||
328 1e84c7b7 2022-01-10 op rauth.dir[sizeof(rauth.dir)-1] != '\0')
329 1e84c7b7 2022-01-10 op fatalx("IMSG_AUTH strings not NUL-terminated");
331 1e84c7b7 2022-01-10 op client_privdrop(rauth.uname, rauth.dir);
332 1e84c7b7 2022-01-10 op explicit_bzero(&rauth, sizeof(rauth));
334 fb1a36c0 2022-01-09 op case IMSG_BUF:
336 fb1a36c0 2022-01-09 op fatalx("%s: can't handle messages before"
337 fb1a36c0 2022-01-09 op " doing the auth", __func__);
338 fb1a36c0 2022-01-09 op handle_message(&imsg, IMSG_DATA_SIZE(imsg));
340 fb1a36c0 2022-01-09 op case IMSG_CONN_GONE:
341 fb1a36c0 2022-01-09 op log_debug("closing");
345 fb1a36c0 2022-01-09 op log_debug("%s: unexpected imsg %d",
346 fb1a36c0 2022-01-09 op __func__, imsg.hdr.type);
349 fb1a36c0 2022-01-09 op imsg_free(&imsg);
353 fb1a36c0 2022-01-09 op imsg_event_add(iev);
355 fb1a36c0 2022-01-09 op /* This pipe is dead. Remove its event handler. */
356 fb1a36c0 2022-01-09 op event_del(&iev->ev);
357 fb1a36c0 2022-01-09 op log_debug("pipe closed, shutting down...");
358 fb1a36c0 2022-01-09 op event_loopexit(NULL);
363 fb1a36c0 2022-01-09 op client_privdrop(const char *username, const char *dir)
365 fb1a36c0 2022-01-09 op struct passwd *pw;
367 fb1a36c0 2022-01-09 op setproctitle("client %s", username);
369 fb1a36c0 2022-01-09 op if ((pw = getpwnam(username)) == NULL)
370 fb1a36c0 2022-01-09 op fatalx("getpwnam(%s) failed", username);
372 fb1a36c0 2022-01-09 op if (chroot(dir) == -1)
373 fb1a36c0 2022-01-09 op fatal("chroot");
374 fb1a36c0 2022-01-09 op if (chdir("/") == -1)
375 fb1a36c0 2022-01-09 op fatal("chdir(\"/\")");
377 fb1a36c0 2022-01-09 op if (setgroups(1, &pw->pw_gid) ||
378 fb1a36c0 2022-01-09 op setresgid(pw->pw_gid, pw->pw_gid, pw->pw_gid) ||
379 fb1a36c0 2022-01-09 op setresuid(pw->pw_uid, pw->pw_uid, pw->pw_uid))
380 fb1a36c0 2022-01-09 op fatal("can't drop privileges");
382 fb1a36c0 2022-01-09 op sandbox_client();
383 fb1a36c0 2022-01-09 op log_debug("client ready; user=%s dir=%s", username, dir);
385 fb1a36c0 2022-01-09 op if ((evb = evbuffer_new()) == NULL)
386 fb1a36c0 2022-01-09 op fatal("evbuffer_new");
390 5c69b561 2022-01-29 op client_send_listenerp(int type, uint32_t peerid, const void *data, uint16_t len)
394 fb1a36c0 2022-01-09 op if ((ret = imsg_compose(&iev_listener->ibuf, type, peerid, 0, -1,
395 fb1a36c0 2022-01-09 op data, len)) != -1)
396 fb1a36c0 2022-01-09 op imsg_event_add(iev_listener);
402 5c69b561 2022-01-29 op client_send_listener(int type, const void *data, uint16_t len)
404 865dd323 2022-01-29 op return client_send_listenerp(type, peerid, data, len);
407 fb1a36c0 2022-01-09 op /* set qid fields from sb */
409 fb1a36c0 2022-01-09 op qid_update_from_sb(struct qid *qid, struct stat *sb)
411 fb1a36c0 2022-01-09 op qid->path = sb->st_ino;
414 fb1a36c0 2022-01-09 op * Theoretically (and hopefully!) this should be a 64 bit
415 fb1a36c0 2022-01-09 op * number. Unfortunately, 9P uses 32 bit timestamps.
417 fb1a36c0 2022-01-09 op qid->vers = sb->st_mtim.tv_sec;
419 fb1a36c0 2022-01-09 op if (S_ISREG(sb->st_mode))
420 fb1a36c0 2022-01-09 op qid->type = QTFILE;
421 fb1a36c0 2022-01-09 op else if (S_ISDIR(sb->st_mode))
422 fb1a36c0 2022-01-09 op qid->type = QTDIR;
423 fb1a36c0 2022-01-09 op else if (S_ISLNK(sb->st_mode))
424 fb1a36c0 2022-01-09 op qid->type = QTSYMLINK;
427 fb1a36c0 2022-01-09 op /* creates a qid given a fd */
428 fb1a36c0 2022-01-09 op static struct dir *
429 fb1a36c0 2022-01-09 op new_dir(int fd)
431 fb1a36c0 2022-01-09 op struct dir *dir;
433 fb1a36c0 2022-01-09 op if ((dir = calloc(1, sizeof(*dir))) == NULL)
436 fb1a36c0 2022-01-09 op dir->fd = fd;
437 fb1a36c0 2022-01-09 op STAILQ_INSERT_HEAD(&dirs, dir, entries);
441 fb1a36c0 2022-01-09 op static struct dir *
442 fb1a36c0 2022-01-09 op dir_incref(struct dir *dir)
444 fb1a36c0 2022-01-09 op dir->refcount++;
449 fb1a36c0 2022-01-09 op dir_decref(struct dir *dir)
451 fb1a36c0 2022-01-09 op if (--dir->refcount > 0)
454 fb1a36c0 2022-01-09 op STAILQ_REMOVE(&dirs, dir, dir, entries);
456 fb1a36c0 2022-01-09 op close(dir->fd);
460 fb1a36c0 2022-01-09 op static struct fid *
461 fb1a36c0 2022-01-09 op new_fid(struct dir *dir, uint32_t fid, const char *path, struct qid *qid)
463 fb1a36c0 2022-01-09 op struct fid *f;
464 fb1a36c0 2022-01-09 op struct qid q;
465 fb1a36c0 2022-01-09 op struct stat sb;
467 fb1a36c0 2022-01-09 op if (qid == NULL) {
468 fb1a36c0 2022-01-09 op if (fstatat(dir->fd, path, &sb, 0)) {
469 fb1a36c0 2022-01-09 op log_warn("fstatat(%s)", path);
472 fb1a36c0 2022-01-09 op qid_update_from_sb(&q, &sb);
476 fb1a36c0 2022-01-09 op if ((f = calloc(1, sizeof(*f))) == NULL)
479 fb1a36c0 2022-01-09 op f->dir = dir_incref(dir);
480 fb1a36c0 2022-01-09 op f->fid = fid;
483 543fc013 2022-01-17 op strlcpy(f->fname, path, sizeof(f->fname));
485 fb1a36c0 2022-01-09 op memcpy(&f->qid, qid, sizeof(f->qid));
487 fb1a36c0 2022-01-09 op STAILQ_INSERT_HEAD(&fids, f, entries);
492 fb1a36c0 2022-01-09 op static struct fid *
493 fb1a36c0 2022-01-09 op fid_by_id(uint32_t fid)
495 fb1a36c0 2022-01-09 op struct fid *f;
497 fb1a36c0 2022-01-09 op STAILQ_FOREACH(f, &fids, entries) {
498 fb1a36c0 2022-01-09 op if (f->fid == fid)
506 fb1a36c0 2022-01-09 op free_fid(struct fid *f)
510 fb1a36c0 2022-01-09 op if (f->fd != -1) {
511 fb1a36c0 2022-01-09 op if (f->d != NULL)
512 fb1a36c0 2022-01-09 op r = closedir(f->d);
514 fb1a36c0 2022-01-09 op r = close(f->fd);
517 fb1a36c0 2022-01-09 op fatal("can't close fid %d", f->fid);
519 fb1a36c0 2022-01-09 op if (f->evb != NULL)
520 fb1a36c0 2022-01-09 op evbuffer_free(f->evb);
522 fb1a36c0 2022-01-09 op /* try to honour ORCLOSE if requested */
523 fb1a36c0 2022-01-09 op if (f->iomode & O_CLOEXEC)
524 543fc013 2022-01-17 op unlinkat(f->dir->fd, f->fname, 0);
527 fb1a36c0 2022-01-09 op dir_decref(f->dir);
529 fb1a36c0 2022-01-09 op STAILQ_REMOVE(&fids, f, fid, entries);
534 fb1a36c0 2022-01-09 op parse_message(const uint8_t *data, size_t len, struct np_msg_header *hdr,
535 fb1a36c0 2022-01-09 op uint8_t **cnt)
537 fb1a36c0 2022-01-09 op size_t olen = len;
539 fb1a36c0 2022-01-09 op if (!NPREAD32("len", &hdr->len, &data, &len) ||
540 fb1a36c0 2022-01-09 op !NPREAD8("type", &hdr->type, &data, &len) ||
541 fb1a36c0 2022-01-09 op !NPREAD16("tag", &hdr->tag, &data, &len))
544 fb1a36c0 2022-01-09 op if (olen != hdr->len)
547 fb1a36c0 2022-01-09 op if (hdr->type < Tversion ||
548 fb1a36c0 2022-01-09 op hdr->type >= Tmax ||
549 fb1a36c0 2022-01-09 op hdr->type == Terror ||
550 fb1a36c0 2022-01-09 op (hdr->type & 0x1) != 0) /* cannot recv a R* */
553 fb1a36c0 2022-01-09 op hdr->tag = le32toh(hdr->tag);
555 fb1a36c0 2022-01-09 op *cnt = (uint8_t *)data;
559 fb1a36c0 2022-01-09 op /* TODO: send a proper message to terminate the connection. */
560 fb1a36c0 2022-01-09 op fatalx("got invalid message");
564 fb1a36c0 2022-01-09 op np_write16(struct evbuffer *e, uint16_t x)
566 fb1a36c0 2022-01-09 op x = htole16(x);
567 fb1a36c0 2022-01-09 op evbuffer_add(e, &x, sizeof(x));
571 fb1a36c0 2022-01-09 op np_write32(struct evbuffer *e, uint32_t x)
573 fb1a36c0 2022-01-09 op x = htole32(x);
574 fb1a36c0 2022-01-09 op evbuffer_add(e, &x, sizeof(x));
578 fb1a36c0 2022-01-09 op np_write64(struct evbuffer *e, uint64_t x)
580 fb1a36c0 2022-01-09 op x = htole64(x);
581 fb1a36c0 2022-01-09 op evbuffer_add(e, &x, sizeof(x));
585 fb1a36c0 2022-01-09 op np_writebuf(struct evbuffer *e, size_t len, void *data)
587 fb1a36c0 2022-01-09 op evbuffer_add(e, data, len);
591 fb1a36c0 2022-01-09 op np_header(uint32_t len, uint8_t type, uint16_t tag)
593 fb1a36c0 2022-01-09 op len += HEADERSIZE;
595 fb1a36c0 2022-01-09 op len = htole32(len);
596 fb1a36c0 2022-01-09 op tag = htole16(tag);
598 fb1a36c0 2022-01-09 op evbuffer_add(evb, &len, sizeof(len));
599 fb1a36c0 2022-01-09 op evbuffer_add(evb, &type, sizeof(type));
600 fb1a36c0 2022-01-09 op evbuffer_add(evb, &tag, sizeof(tag));
604 fb1a36c0 2022-01-09 op np_string(struct evbuffer *e, uint16_t len, const char *str)
606 fb1a36c0 2022-01-09 op uint16_t l = len;
608 fb1a36c0 2022-01-09 op len = htole16(len);
609 fb1a36c0 2022-01-09 op evbuffer_add(e, &len, sizeof(len));
610 fb1a36c0 2022-01-09 op evbuffer_add(e, str, l);
614 fb1a36c0 2022-01-09 op np_qid(struct evbuffer *e, struct qid *qid)
616 fb1a36c0 2022-01-09 op uint64_t path;
617 fb1a36c0 2022-01-09 op uint32_t vers;
619 fb1a36c0 2022-01-09 op path = htole64(qid->path);
620 fb1a36c0 2022-01-09 op vers = htole32(qid->vers);
622 fb1a36c0 2022-01-09 op evbuffer_add(e, &qid->type, sizeof(qid->type));
623 fb1a36c0 2022-01-09 op evbuffer_add(e, &vers, sizeof(vers));
624 fb1a36c0 2022-01-09 op evbuffer_add(e, &path, sizeof(path));
628 fb1a36c0 2022-01-09 op do_send(void)
633 fb1a36c0 2022-01-09 op len = EVBUFFER_LENGTH(evb);
634 fb1a36c0 2022-01-09 op data = EVBUFFER_DATA(evb);
636 fb1a36c0 2022-01-09 op #if DEBUG_PACKETS
637 fb1a36c0 2022-01-09 op hexdump("outgoing packet", data, len);
639 fb1a36c0 2022-01-09 op client_send_listener(IMSG_BUF, data, len);
640 fb1a36c0 2022-01-09 op evbuffer_drain(evb, len);
644 fb1a36c0 2022-01-09 op np_version(uint16_t tag, uint32_t msize, const char *version)
648 fb1a36c0 2022-01-09 op l = strlen(version);
650 fb1a36c0 2022-01-09 op msize = htole32(msize);
652 fb1a36c0 2022-01-09 op np_header(sizeof(msize) + sizeof(l) + l, Rversion, tag);
653 fb1a36c0 2022-01-09 op evbuffer_add(evb, &msize, sizeof(msize));
654 fb1a36c0 2022-01-09 op np_string(evb, l, version);
659 fb1a36c0 2022-01-09 op np_attach(uint16_t tag, struct qid *qid)
661 fb1a36c0 2022-01-09 op np_header(QIDSIZE, Rattach, tag);
662 fb1a36c0 2022-01-09 op np_qid(evb, qid);
667 fb1a36c0 2022-01-09 op np_clunk(uint16_t tag)
669 fb1a36c0 2022-01-09 op np_header(0, Rclunk, tag);
674 fb1a36c0 2022-01-09 op np_flush(uint16_t tag)
676 fb1a36c0 2022-01-09 op np_header(0, Rflush, tag);
681 fb1a36c0 2022-01-09 op np_walk(uint16_t tag, int nwqid, struct qid *wqid)
685 fb1a36c0 2022-01-09 op /* two bytes for the counter */
686 fb1a36c0 2022-01-09 op np_header(2 + QIDSIZE * nwqid, Rwalk, tag);
687 fb1a36c0 2022-01-09 op np_write16(evb, nwqid);
688 fb1a36c0 2022-01-09 op for (i = 0; i < nwqid; ++i)
689 fb1a36c0 2022-01-09 op np_qid(evb, wqid + i);
695 fb1a36c0 2022-01-09 op np_open(uint16_t tag, struct qid *qid, uint32_t iounit)
697 fb1a36c0 2022-01-09 op np_header(QIDSIZE + sizeof(iounit), Ropen, tag);
698 fb1a36c0 2022-01-09 op np_qid(evb, qid);
699 fb1a36c0 2022-01-09 op np_write32(evb, iounit);
704 fb1a36c0 2022-01-09 op np_create(uint16_t tag, struct qid *qid, uint32_t iounit)
706 fb1a36c0 2022-01-09 op np_header(QIDSIZE + sizeof(iounit), Rcreate, tag);
707 fb1a36c0 2022-01-09 op np_qid(evb, qid);
708 fb1a36c0 2022-01-09 op np_write32(evb, iounit);
713 fb1a36c0 2022-01-09 op np_read(uint16_t tag, uint32_t count, void *data)
715 fb1a36c0 2022-01-09 op if (sizeof(count) + count + HEADERSIZE >= msize) {
716 fb1a36c0 2022-01-09 op np_error(tag, "Rread would overflow");
720 fb1a36c0 2022-01-09 op np_header(sizeof(count) + count, Rread, tag);
721 fb1a36c0 2022-01-09 op np_write32(evb, count);
722 fb1a36c0 2022-01-09 op np_writebuf(evb, count, data);
727 fb1a36c0 2022-01-09 op np_write(uint16_t tag, uint32_t count)
729 fb1a36c0 2022-01-09 op np_header(sizeof(count), Rwrite, tag);
730 fb1a36c0 2022-01-09 op np_write32(evb, count);
735 70540bb5 2022-02-02 op np_stat(uint16_t tag, uint16_t count, void *data)
737 fb1a36c0 2022-01-09 op if (sizeof(count) + count + HEADERSIZE >= msize) {
738 fb1a36c0 2022-01-09 op np_error(tag, "Rstat would overflow");
742 70540bb5 2022-02-02 op np_header(sizeof(count) + count, Rstat, tag);
743 70540bb5 2022-02-02 op np_write16(evb, count);
744 fb1a36c0 2022-01-09 op np_writebuf(evb, count, data);
749 755d75bf 2022-01-17 op np_wstat(uint16_t tag)
751 755d75bf 2022-01-17 op np_header(0, Rwstat, tag);
756 fb1a36c0 2022-01-09 op np_remove(uint16_t tag)
758 fb1a36c0 2022-01-09 op np_header(0, Rremove, tag);
763 fb1a36c0 2022-01-09 op np_error(uint16_t tag, const char *errstr)
767 fb1a36c0 2022-01-09 op l = strlen(errstr);
769 fb1a36c0 2022-01-09 op np_header(sizeof(l) + l, Rerror, tag);
770 fb1a36c0 2022-01-09 op np_string(evb, l, errstr);
775 fb1a36c0 2022-01-09 op np_errno(uint16_t tag)
777 fb1a36c0 2022-01-09 op int saved_errno;
778 fb1a36c0 2022-01-09 op char buf[NL_TEXTMAX] = {0};
780 fb1a36c0 2022-01-09 op saved_errno = errno;
782 fb1a36c0 2022-01-09 op strerror_r(errno, buf, sizeof(buf));
783 fb1a36c0 2022-01-09 op np_error(tag, buf);
785 fb1a36c0 2022-01-09 op errno = saved_errno;
789 fb1a36c0 2022-01-09 op np_read8(const char *t, const char *f, uint8_t *dst, const uint8_t **src,
792 fb1a36c0 2022-01-09 op if (*len < sizeof(*dst)) {
793 fb1a36c0 2022-01-09 op log_warnx("%s: wanted %zu bytes for the %s field but only "
794 fb1a36c0 2022-01-09 op "%zu are available.", t, sizeof(*dst), f, *len);
798 fb1a36c0 2022-01-09 op memcpy(dst, *src, sizeof(*dst));
799 fb1a36c0 2022-01-09 op *src += sizeof(*dst);
800 fb1a36c0 2022-01-09 op *len -= sizeof(*dst);
806 fb1a36c0 2022-01-09 op np_read16(const char *t, const char *f, uint16_t *dst, const uint8_t **src,
809 fb1a36c0 2022-01-09 op if (*len < sizeof(*dst)) {
810 fb1a36c0 2022-01-09 op log_warnx("%s: wanted %zu bytes for the %s field but only "
811 fb1a36c0 2022-01-09 op "%zu are available.", t, sizeof(*dst), f, *len);
815 fb1a36c0 2022-01-09 op memcpy(dst, *src, sizeof(*dst));
816 fb1a36c0 2022-01-09 op *src += sizeof(*dst);
817 fb1a36c0 2022-01-09 op *len -= sizeof(*dst);
818 fb1a36c0 2022-01-09 op *dst = le16toh(*dst);
824 fb1a36c0 2022-01-09 op np_read32(const char *t, const char *f, uint32_t *dst, const uint8_t **src,
827 fb1a36c0 2022-01-09 op if (*len < sizeof(*dst)) {
828 fb1a36c0 2022-01-09 op log_warnx("%s: wanted %zu bytes for the %s field but only "
829 fb1a36c0 2022-01-09 op "%zu are available.", t, sizeof(*dst), f, *len);
833 fb1a36c0 2022-01-09 op memcpy(dst, *src, sizeof(*dst));
834 fb1a36c0 2022-01-09 op *src += sizeof(*dst);
835 fb1a36c0 2022-01-09 op *len -= sizeof(*dst);
836 fb1a36c0 2022-01-09 op *dst = le32toh(*dst);
842 fb1a36c0 2022-01-09 op np_read64(const char *t, const char *f, uint64_t *dst, const uint8_t **src,
845 fb1a36c0 2022-01-09 op if (*len < sizeof(*dst)) {
846 fb1a36c0 2022-01-09 op log_warnx("%s: wanted %zu bytes for the %s field but only "
847 fb1a36c0 2022-01-09 op "%zu are available.", t, sizeof(*dst), f, *len);
851 fb1a36c0 2022-01-09 op memcpy(dst, *src, sizeof(*dst));
852 fb1a36c0 2022-01-09 op *src += sizeof(*dst);
853 fb1a36c0 2022-01-09 op *len -= sizeof(*dst);
854 fb1a36c0 2022-01-09 op *dst = le64toh(*dst);
860 fb1a36c0 2022-01-09 op np_readstr(const char *t, const char *f, char *res, size_t reslen,
861 fb1a36c0 2022-01-09 op const uint8_t **src, size_t *len)
864 fb1a36c0 2022-01-09 op char buf[32];
866 fb1a36c0 2022-01-09 op strlcpy(buf, f, sizeof(buf));
867 fb1a36c0 2022-01-09 op strlcat(buf, "-len", sizeof(buf));
869 fb1a36c0 2022-01-09 op if (!np_read16(t, buf, &sl, src, len))
870 fb1a36c0 2022-01-09 op return READSTRERR;
872 fb1a36c0 2022-01-09 op if (*len < sl) {
873 fb1a36c0 2022-01-09 op log_warnx("%s: wanted %d bytes for the %s field but only "
874 fb1a36c0 2022-01-09 op "%zu are available.", t, sl, f, *len);
875 fb1a36c0 2022-01-09 op return READSTRERR;
878 fb1a36c0 2022-01-09 op if (*len > reslen-1)
879 fb1a36c0 2022-01-09 op return READSTRTRUNC;
881 fb1a36c0 2022-01-09 op memcpy(res, *src, sl);
882 fb1a36c0 2022-01-09 op res[sl] = '\0';
890 755d75bf 2022-01-17 op np_readst(const char *t, const char *f, struct np_stat *st,
891 755d75bf 2022-01-17 op char *name, size_t namelen, const uint8_t **src, size_t *len)
893 755d75bf 2022-01-17 op memset(st, 0, sizeof(*st));
895 9029ac6f 2022-01-19 op if (!np_read16(t, "stat.size", &st->size, src, len) ||
896 9029ac6f 2022-01-19 op !np_read16(t, "stat.type", &st->type, src, len) ||
897 755d75bf 2022-01-17 op !np_read32(t, "stat.dev", &st->dev, src, len) ||
898 755d75bf 2022-01-17 op !np_read64(t, "stat.qid.path", &st->qid.path, src, len) ||
899 755d75bf 2022-01-17 op !np_read32(t, "stat.qid.vers", &st->qid.vers, src, len) ||
900 755d75bf 2022-01-17 op !np_read8(t, "stat.qid.type", &st->qid.type, src, len) ||
901 755d75bf 2022-01-17 op !np_read32(t, "stat.mode", &st->mode, src, len) ||
902 755d75bf 2022-01-17 op !np_read32(t, "stat.atime", &st->atime, src, len) ||
903 755d75bf 2022-01-17 op !np_read32(t, "stat.mtime", &st->mtime, src, len) ||
904 755d75bf 2022-01-17 op !np_read64(t, "stat.length", &st->length, src, len))
905 755d75bf 2022-01-17 op return READSTRERR;
908 755d75bf 2022-01-17 op * ignore everything but the name, we don't support
909 755d75bf 2022-01-17 op * changing those fields anyway
911 755d75bf 2022-01-17 op st->name = name;
912 755d75bf 2022-01-17 op return np_readstr(t, "stat.name", name, namelen, src, len);
916 fb1a36c0 2022-01-09 op tversion(struct np_msg_header *hdr, const uint8_t *data, size_t len)
918 fb1a36c0 2022-01-09 op char *dot, version[32];
920 fb1a36c0 2022-01-09 op if (handshaked)
923 fb1a36c0 2022-01-09 op /* msize[4] version[s] */
924 fb1a36c0 2022-01-09 op if (!NPREAD32("msize", &msize, &data, &len))
927 fb1a36c0 2022-01-09 op switch (NPREADSTR("version", version, sizeof(version), &data, &len)) {
928 fb1a36c0 2022-01-09 op case READSTRERR:
930 fb1a36c0 2022-01-09 op case READSTRTRUNC:
931 fb1a36c0 2022-01-09 op log_warnx("9P version string too long, truncated");
932 fb1a36c0 2022-01-09 op goto mismatch;
935 bcdb46a7 2022-01-19 op if (len != 0)
938 fb1a36c0 2022-01-09 op if ((dot = strchr(version, '.')) != NULL)
941 fb1a36c0 2022-01-09 op if (strcmp(version, VERSION9P) != 0 ||
943 fb1a36c0 2022-01-09 op goto mismatch;
945 fb1a36c0 2022-01-09 op /* version matched */
946 fb1a36c0 2022-01-09 op handshaked = 1;
947 fb1a36c0 2022-01-09 op msize = MIN(msize, CLIENT_MSIZE);
948 fb1a36c0 2022-01-09 op client_send_listener(IMSG_MSIZE, &msize, sizeof(msize));
949 fb1a36c0 2022-01-09 op np_version(hdr->tag, msize, VERSION9P);
953 fb1a36c0 2022-01-09 op log_warnx("unknown 9P version string: \"%s\", want "VERSION9P,
955 fb1a36c0 2022-01-09 op np_version(hdr->tag, MSIZE9P, "unknown");
959 fb1a36c0 2022-01-09 op client_send_listener(IMSG_CLOSE, NULL, 0);
960 fb1a36c0 2022-01-09 op client_shutdown();
964 fb1a36c0 2022-01-09 op tattach(struct np_msg_header *hdr, const uint8_t *data, size_t len)
966 fb1a36c0 2022-01-09 op struct dir *dir;
967 fb1a36c0 2022-01-09 op struct fid *f;
968 fb1a36c0 2022-01-09 op uint32_t fid, afid;
970 fb1a36c0 2022-01-09 op char aname[PATH_MAX];
972 fb1a36c0 2022-01-09 op /* fid[4] afid[4] uname[s] aname[s] */
974 fb1a36c0 2022-01-09 op if (!NPREAD32("fid", &fid, &data, &len) ||
975 fb1a36c0 2022-01-09 op !NPREAD32("afid", &afid, &data, &len))
978 fb1a36c0 2022-01-09 op /* read the uname but don't actually use it */
979 fb1a36c0 2022-01-09 op switch (NPREADSTR("uname", aname, sizeof(aname), &data, &len)) {
980 fb1a36c0 2022-01-09 op case READSTRERR:
982 fb1a36c0 2022-01-09 op case READSTRTRUNC:
983 fb1a36c0 2022-01-09 op np_error(hdr->tag, "name too long");
987 fb1a36c0 2022-01-09 op switch (NPREADSTR("aname", aname, sizeof(aname), &data, &len)) {
988 fb1a36c0 2022-01-09 op case READSTRERR:
990 fb1a36c0 2022-01-09 op case READSTRTRUNC:
991 fb1a36c0 2022-01-09 op np_error(hdr->tag, "name too long");
995 73df5ca2 2022-02-02 op if (*aname == '\0')
996 73df5ca2 2022-02-02 op strlcpy(aname, "/", sizeof(aname));
998 bcdb46a7 2022-01-19 op if (len != 0)
1001 fb1a36c0 2022-01-09 op if (fid_by_id(fid) != NULL || afid != NOFID) {
1002 fb1a36c0 2022-01-09 op np_error(hdr->tag, "invalid fid or afid");
1006 fb1a36c0 2022-01-09 op if ((fd = open(aname, O_RDONLY|O_DIRECTORY)) == -1)
1009 fb1a36c0 2022-01-09 op if ((dir = new_dir(fd)) == NULL)
1012 fb1a36c0 2022-01-09 op log_debug("attached %s to %d", aname, fid);
1014 fb1a36c0 2022-01-09 op if ((f = new_fid(dir, fid, aname, NULL)) == NULL) {
1015 fb1a36c0 2022-01-09 op dir_decref(dir);
1019 fb1a36c0 2022-01-09 op np_attach(hdr->tag, &f->qid);
1023 fb1a36c0 2022-01-09 op np_errno(hdr->tag);
1024 fb1a36c0 2022-01-09 op log_warn("failed to attach %s", aname);
1028 fb1a36c0 2022-01-09 op client_send_listener(IMSG_CLOSE, NULL, 0);
1029 fb1a36c0 2022-01-09 op client_shutdown();
1033 fb1a36c0 2022-01-09 op tclunk(struct np_msg_header *hdr, const uint8_t *data, size_t len)
1035 fb1a36c0 2022-01-09 op struct fid *f;
1036 fb1a36c0 2022-01-09 op uint32_t fid;
1038 fb1a36c0 2022-01-09 op /* fid[4] */
1039 bcdb46a7 2022-01-19 op if (!NPREAD32("fid", &fid, &data, &len) ||
1041 fb1a36c0 2022-01-09 op client_send_listener(IMSG_CLOSE, NULL, 0);
1042 fb1a36c0 2022-01-09 op client_shutdown();
1046 fb1a36c0 2022-01-09 op if ((f = fid_by_id(fid)) == NULL) {
1047 fb1a36c0 2022-01-09 op np_error(hdr->tag, "invalid fid");
1051 fb1a36c0 2022-01-09 op free_fid(f);
1052 fb1a36c0 2022-01-09 op np_clunk(hdr->tag);
1056 fb1a36c0 2022-01-09 op tflush(struct np_msg_header *hdr, const uint8_t *data, size_t len)
1058 fb1a36c0 2022-01-09 op uint16_t oldtag;
1061 fb1a36c0 2022-01-09 op * We're doing only synchronous I/O. Tflush is implemented
1062 fb1a36c0 2022-01-09 op * only because it's illegal to reply with a Rerror.
1065 fb1a36c0 2022-01-09 op /* oldtag[2] */
1066 fb1a36c0 2022-01-09 op if (len != sizeof(oldtag)) {
1067 fb1a36c0 2022-01-09 op log_warnx("Tflush with the wrong size: got %zu want %zu",
1068 fb1a36c0 2022-01-09 op len, sizeof(oldtag));
1069 fb1a36c0 2022-01-09 op client_send_listener(IMSG_CLOSE, NULL, 0);
1070 fb1a36c0 2022-01-09 op client_shutdown();
1074 fb1a36c0 2022-01-09 op np_flush(hdr->tag);
1078 fb1a36c0 2022-01-09 op twalk(struct np_msg_header *hdr, const uint8_t *data, size_t len)
1080 fb1a36c0 2022-01-09 op struct stat sb;
1081 fb1a36c0 2022-01-09 op struct dir *dir;
1082 fb1a36c0 2022-01-09 op struct qid wqid[MAXWELEM] = {0};
1083 fb1a36c0 2022-01-09 op struct fid *f, *nf;
1084 fb1a36c0 2022-01-09 op uint32_t fid, newfid;
1085 fb1a36c0 2022-01-09 op uint16_t nwname;
1086 fb1a36c0 2022-01-09 op int fd, oldfd, no, nwqid = 0;
1087 fb1a36c0 2022-01-09 op char wnam[PATH_MAX];
1089 fb1a36c0 2022-01-09 op if (!NPREAD32("fid", &fid, &data, &len) ||
1090 fb1a36c0 2022-01-09 op !NPREAD32("newfid", &newfid, &data, &len) ||
1091 fb1a36c0 2022-01-09 op !NPREAD16("nwname", &nwname, &data, &len))
1094 fb1a36c0 2022-01-09 op if (nwname > MAXWELEM) {
1095 fb1a36c0 2022-01-09 op log_warnx("Twalk: more than %d path elements: %d",
1096 fb1a36c0 2022-01-09 op MAXWELEM, nwname);
1100 fb1a36c0 2022-01-09 op if ((f = fid_by_id(fid)) == NULL) {
1101 fb1a36c0 2022-01-09 op np_error(hdr->tag, "invalid fid");
1105 fb1a36c0 2022-01-09 op if (f->fd != -1) {
1106 fb1a36c0 2022-01-09 op np_error(hdr->tag, "fid already opened for I/O");
1110 fb1a36c0 2022-01-09 op if (fid == newfid)
1112 fb1a36c0 2022-01-09 op else if ((nf = fid_by_id(newfid)) != NULL) {
1113 fb1a36c0 2022-01-09 op np_error(hdr->tag, "newfid already in use");
1118 fb1a36c0 2022-01-09 op /* special case: fid duplication */
1119 fb1a36c0 2022-01-09 op if (nwname == 0) {
1121 fb1a36c0 2022-01-09 op * TODO: should we forbid fids duplication when fid ==
1124 fb1a36c0 2022-01-09 op if (nf == NULL &&
1125 543fc013 2022-01-17 op (nf = new_fid(f->dir, newfid, f->fname, &f->qid)) == NULL)
1126 fb1a36c0 2022-01-09 op fatal("new_fid duplication");
1128 fb1a36c0 2022-01-09 op np_walk(hdr->tag, 0, NULL);
1132 fb1a36c0 2022-01-09 op if (!(f->qid.type & QTDIR)) {
1133 fb1a36c0 2022-01-09 op np_error(hdr->tag, "fid doesn't represent a directory");
1137 fb1a36c0 2022-01-09 op oldfd = f->dir->fd;
1139 fb1a36c0 2022-01-09 op for (nwqid = 0; nwqid < nwname; nwqid++) {
1140 fb1a36c0 2022-01-09 op switch (NPREADSTR("wname", wnam, sizeof(wnam), &data, &len)) {
1141 fb1a36c0 2022-01-09 op case READSTRERR:
1143 fb1a36c0 2022-01-09 op case READSTRTRUNC:
1144 fb1a36c0 2022-01-09 op np_error(hdr->tag, "wname too long");
1148 fb1a36c0 2022-01-09 op if (*wnam == '\0' ||
1149 fb1a36c0 2022-01-09 op strchr(wnam, '/') != NULL ||
1150 fb1a36c0 2022-01-09 op !strcmp(wnam, ".")) {
1151 fb1a36c0 2022-01-09 op errno = EINVAL;
1152 fb1a36c0 2022-01-09 op goto cantopen;
1155 fb1a36c0 2022-01-09 op if ((fd = openat(oldfd, wnam, O_RDONLY|O_DIRECTORY)) == -1 &&
1156 fb1a36c0 2022-01-09 op errno != ENOTDIR)
1157 fb1a36c0 2022-01-09 op goto cantopen;
1159 fb1a36c0 2022-01-09 op if ((fd == -1 && fstatat(oldfd, wnam, &sb, 0) == -1) ||
1160 fb1a36c0 2022-01-09 op (fd != -1 && fstat(fd, &sb) == -1))
1161 fb1a36c0 2022-01-09 op goto cantopen;
1163 fb1a36c0 2022-01-09 op qid_update_from_sb(&wqid[nwqid], &sb);
1165 fb1a36c0 2022-01-09 op /* reached a file but we still have other components */
1166 fb1a36c0 2022-01-09 op if (fd == -1 && nwqid+1 < nwname)
1167 fb1a36c0 2022-01-09 op goto cantopen;
1169 fb1a36c0 2022-01-09 op /* reached the end and found a file */
1170 fb1a36c0 2022-01-09 op if (fd == -1 && nwqid+1 == nwname)
1173 fb1a36c0 2022-01-09 op if (oldfd != f->dir->fd)
1174 fb1a36c0 2022-01-09 op close(oldfd);
1178 bcdb46a7 2022-01-19 op if (len != 0)
1182 fb1a36c0 2022-01-09 op * If fd is -1 we've reached a file, otherwise we've just
1183 fb1a36c0 2022-01-09 op * reached another directory. We must pay attention to what
1184 fb1a36c0 2022-01-09 op * file descriptor we use to create the dir, because if we've
1185 fb1a36c0 2022-01-09 op * reached a file and oldfd is f->dir->fd then we *must* share
1186 fb1a36c0 2022-01-09 op * the same dir (it was a walk of one path from a directory to a
1187 fb1a36c0 2022-01-09 op * file, otherwise fun is bound to happen as soon as the client
1188 fb1a36c0 2022-01-09 op * closes the fid for the directory but keeps the one for the
1191 fb1a36c0 2022-01-09 op if (fd == -1 && oldfd == f->dir->fd)
1192 fb1a36c0 2022-01-09 op dir = f->dir;
1193 fb1a36c0 2022-01-09 op else if (fd == -1)
1194 fb1a36c0 2022-01-09 op dir = new_dir(oldfd);
1196 fb1a36c0 2022-01-09 op dir = new_dir(fd);
1198 fb1a36c0 2022-01-09 op if (dir == NULL)
1199 fb1a36c0 2022-01-09 op fatal("new_dir");
1201 fb1a36c0 2022-01-09 op if (nf == NULL) {
1202 fb1a36c0 2022-01-09 op if ((nf = new_fid(dir, newfid, wnam, &wqid[nwqid-1])) == NULL)
1203 fb1a36c0 2022-01-09 op fatal("new fid");
1205 fb1a36c0 2022-01-09 op /* update the dir */
1206 fb1a36c0 2022-01-09 op dir_decref(nf->dir);
1207 fb1a36c0 2022-01-09 op nf->dir = dir_incref(dir);
1210 fb1a36c0 2022-01-09 op np_walk(hdr->tag, nwqid, wqid);
1214 fb1a36c0 2022-01-09 op if (oldfd != f->dir->fd)
1215 fb1a36c0 2022-01-09 op close(oldfd);
1217 fb1a36c0 2022-01-09 op if (nwqid == 0)
1218 fb1a36c0 2022-01-09 op np_error(hdr->tag, strerror(no));
1220 fb1a36c0 2022-01-09 op np_walk(hdr->tag, nwqid, wqid);
1224 fb1a36c0 2022-01-09 op client_send_listener(IMSG_CLOSE, NULL, 0);
1225 fb1a36c0 2022-01-09 op client_shutdown();
1228 fb1a36c0 2022-01-09 op static inline int
1229 fb1a36c0 2022-01-09 op npmode_to_unix(uint8_t mode, int *flags)
1231 fb1a36c0 2022-01-09 op switch (mode & 0x0F) {
1232 fb1a36c0 2022-01-09 op case KOREAD:
1233 fb1a36c0 2022-01-09 op *flags = O_RDONLY;
1235 fb1a36c0 2022-01-09 op case KOWRITE:
1236 fb1a36c0 2022-01-09 op *flags = O_WRONLY;
1238 fb1a36c0 2022-01-09 op case KORDWR:
1239 fb1a36c0 2022-01-09 op *flags = O_RDWR;
1241 fb1a36c0 2022-01-09 op case KOEXEC:
1242 fb1a36c0 2022-01-09 op log_warnx("tried to open something with KOEXEC");
1243 fb1a36c0 2022-01-09 op /* fallthrough */
1248 fb1a36c0 2022-01-09 op if (mode & KOTRUNC)
1249 fb1a36c0 2022-01-09 op *flags |= O_TRUNC;
1250 fb1a36c0 2022-01-09 op if (mode & KORCLOSE)
1251 fb1a36c0 2022-01-09 op *flags |= O_CLOEXEC;
1257 fb1a36c0 2022-01-09 op topen(struct np_msg_header *hdr, const uint8_t *data, size_t len)
1259 fb1a36c0 2022-01-09 op struct stat sb;
1260 fb1a36c0 2022-01-09 op struct qid qid;
1261 fb1a36c0 2022-01-09 op struct fid *f;
1262 fb1a36c0 2022-01-09 op uint32_t fid;
1263 fb1a36c0 2022-01-09 op uint8_t mode;
1264 fb1a36c0 2022-01-09 op const char *path;
1266 fb1a36c0 2022-01-09 op /* fid[4] mode[1] */
1267 fb1a36c0 2022-01-09 op if (!NPREAD32("fid", &fid, &data, &len) ||
1268 bcdb46a7 2022-01-19 op !NPREAD8("mode", &mode, &data, &len) ||
1270 fb1a36c0 2022-01-09 op client_send_listener(IMSG_CLOSE, NULL, 0);
1271 fb1a36c0 2022-01-09 op client_shutdown();
1275 fb1a36c0 2022-01-09 op if ((f = fid_by_id(fid)) == NULL || f->fd != -1) {
1276 fb1a36c0 2022-01-09 op np_error(hdr->tag, "invalid fid");
1280 fb1a36c0 2022-01-09 op if (npmode_to_unix(mode, &f->iomode) == -1) {
1281 fb1a36c0 2022-01-09 op np_error(hdr->tag, "invalid mode");
1285 543fc013 2022-01-17 op path = f->fname;
1286 fb1a36c0 2022-01-09 op if (f->qid.type & QTDIR)
1289 fb1a36c0 2022-01-09 op if ((f->fd = openat(f->dir->fd, path, f->iomode)) == -1) {
1290 fb1a36c0 2022-01-09 op np_error(hdr->tag, strerror(errno));
1294 fb1a36c0 2022-01-09 op if (fstat(f->fd, &sb) == -1)
1295 fb1a36c0 2022-01-09 op fatal("fstat");
1297 fb1a36c0 2022-01-09 op if (S_ISDIR(sb.st_mode)) {
1298 fb1a36c0 2022-01-09 op if ((f->d = fdopendir(f->fd)) == NULL) {
1299 fb1a36c0 2022-01-09 op np_errno(hdr->tag);
1300 fb1a36c0 2022-01-09 op close(f->fd);
1305 fb1a36c0 2022-01-09 op if ((f->evb = evbuffer_new()) == NULL) {
1306 fb1a36c0 2022-01-09 op np_errno(hdr->tag);
1307 fb1a36c0 2022-01-09 op closedir(f->d);
1308 fb1a36c0 2022-01-09 op f->d = NULL;
1313 fb1a36c0 2022-01-09 op f->offset = 0;
1315 fb1a36c0 2022-01-09 op qid_update_from_sb(&qid, &sb);
1316 fb1a36c0 2022-01-09 op np_open(hdr->tag, &qid, sb.st_blksize);
1320 fb1a36c0 2022-01-09 op tcreate(struct np_msg_header *hdr, const uint8_t *data, size_t len)
1322 fb1a36c0 2022-01-09 op struct stat sb;
1323 fb1a36c0 2022-01-09 op struct qid qid;
1324 fb1a36c0 2022-01-09 op struct fid *f;
1325 fb1a36c0 2022-01-09 op uint32_t fid, perm;
1326 fb1a36c0 2022-01-09 op uint8_t mode;
1327 fb1a36c0 2022-01-09 op char name[PATH_MAX];
1329 fb1a36c0 2022-01-09 op /* fid[4] name[s] perm[4] mode[1] */
1330 fb1a36c0 2022-01-09 op if (!NPREAD32("fid", &fid, &data, &len))
1332 fb1a36c0 2022-01-09 op switch (NPREADSTR("name", name, sizeof(name), &data, &len)) {
1333 fb1a36c0 2022-01-09 op case READSTRERR:
1335 fb1a36c0 2022-01-09 op case READSTRTRUNC:
1336 fb1a36c0 2022-01-09 op np_error(hdr->tag, "name too long");
1339 fb1a36c0 2022-01-09 op if (!NPREAD32("perm", &perm, &data, &len) ||
1340 bcdb46a7 2022-01-19 op !NPREAD8("mode", &mode, &data, &len) ||
1344 fb1a36c0 2022-01-09 op if (!strcmp(name, ".") || !strcmp(name, "..") ||
1345 fb1a36c0 2022-01-09 op strchr(name, '/') != NULL) {
1346 fb1a36c0 2022-01-09 op np_error(hdr->tag, "invalid name");
1350 fb1a36c0 2022-01-09 op if ((f = fid_by_id(fid)) == NULL || f->fd != -1) {
1351 fb1a36c0 2022-01-09 op np_error(hdr->tag, "invalid fid");
1355 fb1a36c0 2022-01-09 op if (!(f->qid.type & QTDIR)) {
1356 fb1a36c0 2022-01-09 op np_error(hdr->tag, "fid doesn't identify a directory");
1360 fb1a36c0 2022-01-09 op if (npmode_to_unix(mode, &f->iomode) == -1) {
1361 fb1a36c0 2022-01-09 op np_error(hdr->tag, "invalid mode");
1365 fb1a36c0 2022-01-09 op if (f->iomode & O_RDONLY) {
1366 fb1a36c0 2022-01-09 op np_error(hdr->tag, "can't create a read-only file");
1370 fb1a36c0 2022-01-09 op /* TODO: parse the mode */
1372 fb1a36c0 2022-01-09 op if (perm & 0x80000000) {
1373 fb1a36c0 2022-01-09 op /* create a directory */
1374 fb1a36c0 2022-01-09 op f->fd = mkdirat(f->dir->fd, name, 0755);
1376 fb1a36c0 2022-01-09 op /* create a file */
1377 fb1a36c0 2022-01-09 op f->fd = openat(f->dir->fd, name, f->iomode | O_CREAT | O_TRUNC,
1381 fb1a36c0 2022-01-09 op if (f->fd == -1) {
1382 fb1a36c0 2022-01-09 op np_errno(hdr->tag);
1386 fb1a36c0 2022-01-09 op if (fstat(f->fd, &sb) == -1)
1387 fb1a36c0 2022-01-09 op fatal("fstat");
1389 fb1a36c0 2022-01-09 op if (S_ISDIR(sb.st_mode)) {
1390 fb1a36c0 2022-01-09 op if ((f->d = fdopendir(f->fd)) == NULL) {
1391 fb1a36c0 2022-01-09 op np_errno(hdr->tag);
1392 fb1a36c0 2022-01-09 op close(f->fd);
1397 fb1a36c0 2022-01-09 op if ((f->evb = evbuffer_new()) == NULL) {
1398 fb1a36c0 2022-01-09 op np_errno(hdr->tag);
1399 fb1a36c0 2022-01-09 op closedir(f->d);
1400 fb1a36c0 2022-01-09 op f->d = NULL;
1405 fb1a36c0 2022-01-09 op f->offset = 0;
1407 fb1a36c0 2022-01-09 op qid_update_from_sb(&qid, &sb);
1408 fb1a36c0 2022-01-09 op np_create(hdr->tag, &qid, sb.st_blksize);
1413 fb1a36c0 2022-01-09 op client_send_listener(IMSG_CLOSE, NULL, 0);
1414 fb1a36c0 2022-01-09 op client_shutdown();
1417 fb1a36c0 2022-01-09 op static inline void
1418 fb1a36c0 2022-01-09 op serialize_stat(const char *fname, struct stat *sb, struct evbuffer *evb)
1420 fb1a36c0 2022-01-09 op struct qid qid;
1421 fb1a36c0 2022-01-09 op const char *uid, *gid, *muid;
1423 fb1a36c0 2022-01-09 op uint16_t namlen, uidlen, gidlen, ulen;
1425 fb1a36c0 2022-01-09 op qid_update_from_sb(&qid, sb);
1427 fb1a36c0 2022-01-09 op /* TODO: fill these fields */
1432 fb1a36c0 2022-01-09 op namlen = strlen(fname);
1433 fb1a36c0 2022-01-09 op uidlen = strlen(uid);
1434 fb1a36c0 2022-01-09 op gidlen = strlen(gid);
1435 fb1a36c0 2022-01-09 op ulen = strlen(muid);
1437 fb1a36c0 2022-01-09 op tot = NPSTATSIZ(namlen, uidlen, gidlen, ulen);
1438 fb1a36c0 2022-01-09 op if (tot > UINT32_MAX) {
1439 fb1a36c0 2022-01-09 op log_warnx("stat info for dir entry %s would overflow",
1444 fb1a36c0 2022-01-09 op np_write16(evb, tot); /* size[2] */
1445 fb1a36c0 2022-01-09 op np_write16(evb, sb->st_rdev); /* type[2] */
1446 fb1a36c0 2022-01-09 op np_write32(evb, sb->st_dev); /* dev[4] */
1447 fb1a36c0 2022-01-09 op np_qid(evb, &qid); /* qid[13] */
1449 fb1a36c0 2022-01-09 op /* XXX: translate? */
1450 fb1a36c0 2022-01-09 op np_write32(evb, sb->st_mode); /* mode[4] */
1452 fb1a36c0 2022-01-09 op np_write32(evb, sb->st_atim.tv_sec); /* atime[4] */
1453 fb1a36c0 2022-01-09 op np_write32(evb, sb->st_mtim.tv_sec); /* mtime[4] */
1455 68a7ef68 2022-01-16 op /* special case: directories have size 0 */
1456 68a7ef68 2022-01-16 op if (qid.type & QTDIR)
1457 68a7ef68 2022-01-16 op np_write64(evb, 0);
1459 68a7ef68 2022-01-16 op np_write64(evb, sb->st_size); /* length[8] */
1461 fb1a36c0 2022-01-09 op np_string(evb, namlen, fname); /* name[s] */
1462 fb1a36c0 2022-01-09 op np_string(evb, uidlen, uid); /* uid[s] */
1463 fb1a36c0 2022-01-09 op np_string(evb, gidlen, gid); /* gid[s] */
1464 fb1a36c0 2022-01-09 op np_string(evb, ulen, muid); /* muid[s] */
1468 fb1a36c0 2022-01-09 op tread(struct np_msg_header *hdr, const uint8_t *data, size_t len)
1470 fb1a36c0 2022-01-09 op struct fid *f;
1472 fb1a36c0 2022-01-09 op size_t howmuch;
1473 fb1a36c0 2022-01-09 op uint64_t off;
1474 fb1a36c0 2022-01-09 op uint32_t fid, count;
1475 fb1a36c0 2022-01-09 op char buf[2048];
1477 fb1a36c0 2022-01-09 op /* fid[4] offset[8] count[4] */
1478 fb1a36c0 2022-01-09 op if (!NPREAD32("fid", &fid, &data, &len) ||
1479 fb1a36c0 2022-01-09 op !NPREAD64("offset", &off, &data, &len) ||
1480 bcdb46a7 2022-01-19 op !NPREAD32("count", &count, &data, &len) ||
1482 fb1a36c0 2022-01-09 op client_send_listener(IMSG_CLOSE, NULL, 0);
1483 fb1a36c0 2022-01-09 op client_shutdown();
1487 fb1a36c0 2022-01-09 op if ((f = fid_by_id(fid)) == NULL || f->fd == -1) {
1488 fb1a36c0 2022-01-09 op np_error(hdr->tag, "invalid fid");
1492 fb1a36c0 2022-01-09 op if (TYPE_OVERFLOW(off_t, off)) {
1493 fb1a36c0 2022-01-09 op log_warnx("unexpected off_t size");
1494 fb1a36c0 2022-01-09 op np_error(hdr->tag, "invalid offset");
1498 fb1a36c0 2022-01-09 op if (f->d == NULL) {
1499 fb1a36c0 2022-01-09 op /* read a file */
1500 fb1a36c0 2022-01-09 op howmuch = MIN(sizeof(buf), count);
1501 fb1a36c0 2022-01-09 op r = pread(f->fd, buf, howmuch, (off_t)off);
1502 fb1a36c0 2022-01-09 op if (r == -1)
1503 fb1a36c0 2022-01-09 op np_errno(hdr->tag);
1505 fb1a36c0 2022-01-09 op np_read(hdr->tag, r, buf);
1507 fb1a36c0 2022-01-09 op if (off == 0 && f->offset != 0) {
1508 fb1a36c0 2022-01-09 op rewinddir(f->d);
1509 fb1a36c0 2022-01-09 op f->offset = 0;
1510 fb1a36c0 2022-01-09 op evbuffer_drain(f->evb, EVBUFFER_LENGTH(f->evb));
1513 fb1a36c0 2022-01-09 op if (off != f->offset) {
1514 fb1a36c0 2022-01-09 op np_error(hdr->tag, "can't seek in directories");
1518 fb1a36c0 2022-01-09 op while (EVBUFFER_LENGTH(f->evb) < count) {
1519 fb1a36c0 2022-01-09 op struct dirent *d;
1520 fb1a36c0 2022-01-09 op struct stat sb;
1522 fb1a36c0 2022-01-09 op if ((d = readdir(f->d)) == NULL)
1524 fb1a36c0 2022-01-09 op if (fstatat(f->fd, d->d_name, &sb, 0) == -1) {
1525 fb1a36c0 2022-01-09 op warn("fstatat");
1528 fb1a36c0 2022-01-09 op serialize_stat(d->d_name, &sb, f->evb);
1531 fb1a36c0 2022-01-09 op count = MIN(count, EVBUFFER_LENGTH(f->evb));
1532 fb1a36c0 2022-01-09 op np_read(hdr->tag, count, EVBUFFER_DATA(f->evb));
1533 fb1a36c0 2022-01-09 op evbuffer_drain(f->evb, count);
1535 fb1a36c0 2022-01-09 op f->offset += count;
1540 fb1a36c0 2022-01-09 op twrite(struct np_msg_header *hdr, const uint8_t *data, size_t len)
1542 fb1a36c0 2022-01-09 op struct fid *f;
1544 fb1a36c0 2022-01-09 op uint64_t off;
1545 fb1a36c0 2022-01-09 op uint32_t fid, count;
1547 fb1a36c0 2022-01-09 op /* fid[4] offset[8] count[4] data[count] */
1548 fb1a36c0 2022-01-09 op if (!NPREAD32("fid", &fid, &data, &len) ||
1549 fb1a36c0 2022-01-09 op !NPREAD64("off", &off, &data, &len) ||
1550 fb1a36c0 2022-01-09 op !NPREAD32("count", &count, &data, &len) ||
1551 fb1a36c0 2022-01-09 op len != count) {
1552 fb1a36c0 2022-01-09 op client_send_listener(IMSG_CLOSE, NULL, 0);
1553 fb1a36c0 2022-01-09 op client_shutdown();
1557 fb1a36c0 2022-01-09 op if ((f = fid_by_id(fid)) == NULL || f->fd == -1) {
1558 fb1a36c0 2022-01-09 op np_error(hdr->tag, "invalid fid");
1562 fb1a36c0 2022-01-09 op if (!(f->iomode & O_WRONLY) &&
1563 fb1a36c0 2022-01-09 op !(f->iomode & O_RDWR)) {
1564 fb1a36c0 2022-01-09 op np_error(hdr->tag, "fid not opened for writing");
1568 fb1a36c0 2022-01-09 op if (TYPE_OVERFLOW(off_t, off)) {
1569 fb1a36c0 2022-01-09 op log_warnx("unexpected off_t size");
1570 fb1a36c0 2022-01-09 op np_error(hdr->tag, "invalid offset");
1574 fb1a36c0 2022-01-09 op if ((r = pwrite(f->fd, data, len, off)) == -1)
1575 fb1a36c0 2022-01-09 op np_errno(hdr->tag);
1577 fb1a36c0 2022-01-09 op np_write(hdr->tag, r);
1581 fb1a36c0 2022-01-09 op tstat(struct np_msg_header *hdr, const uint8_t *data, size_t len)
1583 fb1a36c0 2022-01-09 op struct evbuffer *evb;
1584 fb1a36c0 2022-01-09 op struct stat sb;
1585 fb1a36c0 2022-01-09 op struct fid *f;
1587 fb1a36c0 2022-01-09 op uint32_t fid;
1589 fb1a36c0 2022-01-09 op /* fid[4] */
1590 bcdb46a7 2022-01-19 op if (!NPREAD32("fid", &fid, &data, &len) ||
1592 fb1a36c0 2022-01-09 op client_send_listener(IMSG_CLOSE, NULL, 0);
1593 fb1a36c0 2022-01-09 op client_shutdown();
1598 fb1a36c0 2022-01-09 op * plan9' stat(9P) is not clear on whether the stat is allowed
1599 fb1a36c0 2022-01-09 op * on opened fids or not. We're allowing stat regardless of the
1600 fb1a36c0 2022-01-09 op * status of the fid.
1603 fb1a36c0 2022-01-09 op if ((f = fid_by_id(fid)) == NULL) {
1604 fb1a36c0 2022-01-09 op np_error(hdr->tag, "invalid fid");
1608 fb1a36c0 2022-01-09 op if ((evb = evbuffer_new()) == NULL)
1609 fb1a36c0 2022-01-09 op fatal("evbuffer_new");
1611 fb1a36c0 2022-01-09 op if (f->fd != -1)
1612 fb1a36c0 2022-01-09 op r = fstat(f->fd, &sb);
1613 fb1a36c0 2022-01-09 op else if (f->qid.type & QTDIR)
1614 fb1a36c0 2022-01-09 op r = fstat(f->dir->fd, &sb);
1616 543fc013 2022-01-17 op r = fstatat(f->dir->fd, f->fname, &sb, 0);
1618 fb1a36c0 2022-01-09 op if (r == -1) {
1619 fb1a36c0 2022-01-09 op np_errno(hdr->tag);
1620 fb1a36c0 2022-01-09 op evbuffer_free(evb);
1624 543fc013 2022-01-17 op serialize_stat(f->fname, &sb, evb);
1625 fb1a36c0 2022-01-09 op np_stat(hdr->tag, EVBUFFER_LENGTH(evb), EVBUFFER_DATA(evb));
1626 fb1a36c0 2022-01-09 op evbuffer_free(evb);
1630 755d75bf 2022-01-17 op twstat(struct np_msg_header *hdr, const uint8_t *data, size_t len)
1632 755d75bf 2022-01-17 op struct timespec times[2];
1633 755d75bf 2022-01-17 op struct np_stat st;
1634 755d75bf 2022-01-17 op struct fid *f;
1636 755d75bf 2022-01-17 op uint32_t fid;
1637 755d75bf 2022-01-17 op char name[PATH_MAX];
1639 755d75bf 2022-01-17 op /* fid[4] stat[n] */
1640 755d75bf 2022-01-17 op if (!NPREAD32("fid", &fid, &data, &len))
1643 755d75bf 2022-01-17 op switch (NPREADST("stat", &st, name, sizeof(name), &data, &len)) {
1644 755d75bf 2022-01-17 op case READSTRERR:
1646 755d75bf 2022-01-17 op case READSTRTRUNC:
1647 755d75bf 2022-01-17 op log_warnx("wstat new name would overflow");
1648 755d75bf 2022-01-17 op np_error(hdr->tag, "new name too long");
1653 f4ad0146 2022-01-19 op * We skip the reading of some fields voluntarily because we
1654 f4ad0146 2022-01-19 op * don't support chown, so len will always be > 0!
1656 f4ad0146 2022-01-19 op #ifdef notyet
1657 bcdb46a7 2022-01-19 op if (len != 0)
1661 755d75bf 2022-01-17 op if ((f = fid_by_id(fid)) == NULL) {
1662 755d75bf 2022-01-17 op np_error(hdr->tag, "invalid fid");
1667 755d75bf 2022-01-17 op * 9P wants these edits to be done in an atomic fashion,
1668 755d75bf 2022-01-17 op * something that I don't think it's possible on UNIX without
1669 755d75bf 2022-01-17 op * some special kernel help. Changing atime or mtime,
1670 755d75bf 2022-01-17 op * permissions, or rename the file are different syscalls.
1672 755d75bf 2022-01-17 op * Also, silently ignore stuff we can't/don't want to modify.
1675 755d75bf 2022-01-17 op /* change the permissions */
1676 755d75bf 2022-01-17 op if (st.mode != (uint32_t)-1) {
1677 755d75bf 2022-01-17 op mode_t m = st.mode & 0x7F; /* silently truncate higer bits */
1678 755d75bf 2022-01-17 op if (f->fd != -1)
1679 755d75bf 2022-01-17 op r = fchmod(f->fd, m);
1681 543fc013 2022-01-17 op r = fchmodat(f->dir->fd, f->fname, m, 0);
1683 755d75bf 2022-01-17 op if (r == -1) {
1684 755d75bf 2022-01-17 op np_errno(hdr->tag);
1689 755d75bf 2022-01-17 op /* change the atime/mtime of the fid, opened or not */
1690 755d75bf 2022-01-17 op if (st.atime != (uint32_t)-1 || st.mtime != (uint32_t)-1) {
1691 755d75bf 2022-01-17 op times[0].tv_nsec = UTIME_OMIT;
1692 755d75bf 2022-01-17 op times[1].tv_nsec = UTIME_OMIT;
1694 755d75bf 2022-01-17 op if (st.atime != (uint32_t)-1) {
1695 755d75bf 2022-01-17 op times[0].tv_sec = st.atime;
1696 755d75bf 2022-01-17 op times[0].tv_nsec = 0;
1698 755d75bf 2022-01-17 op if (st.mtime != (uint32_t)-1) {
1699 755d75bf 2022-01-17 op times[1].tv_sec = st.mtime;
1700 755d75bf 2022-01-17 op times[1].tv_nsec = 0;
1703 755d75bf 2022-01-17 op if (f->fd != -1)
1704 755d75bf 2022-01-17 op r = futimens(f->fd, times);
1706 543fc013 2022-01-17 op r = utimensat(f->dir->fd, f->fname, times, 0);
1708 755d75bf 2022-01-17 op if (r == -1) {
1709 755d75bf 2022-01-17 op np_errno(hdr->tag);
1714 755d75bf 2022-01-17 op /* truncate */
1715 755d75bf 2022-01-17 op if (st.length != (uint64_t)-1) {
1716 755d75bf 2022-01-17 op if (f->fd == -1) {
1717 755d75bf 2022-01-17 op np_error(hdr->tag, "can't truncate a non-opened fid");
1721 755d75bf 2022-01-17 op if (f->qid.type & QTDIR && st.length != 0) {
1722 755d75bf 2022-01-17 op np_error(hdr->tag, "can't truncate directories");
1726 755d75bf 2022-01-17 op if (TYPE_OVERFLOW(off_t, st.length)) {
1727 755d75bf 2022-01-17 op log_warnx("truncate request overflows off_t: %"PRIu64,
1729 755d75bf 2022-01-17 op np_error(hdr->tag, "length overflows");
1733 6d3d71a9 2022-01-19 op if (f->qid.type == 0 &&
1734 755d75bf 2022-01-17 op ftruncate(f->fd, st.length) == -1) {
1735 755d75bf 2022-01-17 op np_errno(hdr->tag);
1740 755d75bf 2022-01-17 op /* rename (change the name entry) */
1741 755d75bf 2022-01-17 op if (*st.name != '\0') {
1742 755d75bf 2022-01-17 op struct stat sb;
1743 755d75bf 2022-01-17 op const char *newname;
1746 755d75bf 2022-01-17 op * XXX: 9P requires that we disallow changing the name
1747 755d75bf 2022-01-17 op * to that of an existing file. We can't do that
1748 755d75bf 2022-01-17 op * atomically (rename is happy about stealing names)
1749 755d75bf 2022-01-17 op * so this is just a best effort.
1751 755d75bf 2022-01-17 op if (fstatat(f->dir->fd, st.name, &sb, 0) == -1 &&
1752 755d75bf 2022-01-17 op errno != ENOENT) {
1753 755d75bf 2022-01-17 op np_error(hdr->tag, "target file exists");
1757 543fc013 2022-01-17 op r = renameat(f->dir->fd, f->fname, f->dir->fd, st.name);
1758 755d75bf 2022-01-17 op if (r == -1) {
1759 755d75bf 2022-01-17 op np_errno(hdr->tag);
1763 755d75bf 2022-01-17 op /* fix the fid so it points to the new file */
1765 755d75bf 2022-01-17 op if ((newname = strchr(st.name, '/')) != NULL)
1766 755d75bf 2022-01-17 op newname++; /* skip / */
1768 755d75bf 2022-01-17 op newname = st.name;
1769 543fc013 2022-01-17 op strlcpy(f->fname, newname, sizeof(f->fname));
1771 755d75bf 2022-01-17 op if (strchr(st.name, '/') != NULL) {
1772 755d75bf 2022-01-17 op struct dir *dir;
1773 755d75bf 2022-01-17 op char *dname;
1776 755d75bf 2022-01-17 op dname = dirname(st.name);
1777 755d75bf 2022-01-17 op fd = openat(f->dir->fd, dname, O_RDONLY|O_DIRECTORY);
1778 755d75bf 2022-01-17 op if (fd == -1) {
1779 755d75bf 2022-01-17 op np_errno(hdr->tag);
1780 755d75bf 2022-01-17 op free_fid(f);
1784 755d75bf 2022-01-17 op if ((dir = new_dir(fd)) == NULL) {
1785 755d75bf 2022-01-17 op np_errno(hdr->tag);
1786 755d75bf 2022-01-17 op free_fid(f);
1790 755d75bf 2022-01-17 op dir_decref(f->dir);
1791 755d75bf 2022-01-17 op f->dir = dir_incref(dir);
1795 755d75bf 2022-01-17 op np_wstat(hdr->tag);
1799 755d75bf 2022-01-17 op client_send_listener(IMSG_CLOSE, NULL, 0);
1800 755d75bf 2022-01-17 op client_shutdown();
1804 fb1a36c0 2022-01-09 op tremove(struct np_msg_header *hdr, const uint8_t *data, size_t len)
1806 fb1a36c0 2022-01-09 op struct fid *f;
1807 fb1a36c0 2022-01-09 op uint32_t fid;
1809 fb1a36c0 2022-01-09 op char dirpath[PATH_MAX + 3];
1811 fb1a36c0 2022-01-09 op /* fid[4] */
1812 bcdb46a7 2022-01-19 op if (!NPREAD32("fid", &fid, &data, &len) ||
1814 fb1a36c0 2022-01-09 op client_send_listener(IMSG_CLOSE, NULL, 0);
1815 fb1a36c0 2022-01-09 op client_shutdown();
1819 fb1a36c0 2022-01-09 op if ((f = fid_by_id(fid)) == NULL) {
1820 fb1a36c0 2022-01-09 op np_error(hdr->tag, "invalid fid");
1824 fb1a36c0 2022-01-09 op if (f->qid.type & QTDIR) { /* directory */
1825 fb1a36c0 2022-01-09 op strlcpy(dirpath, "../", sizeof(dirpath));
1826 543fc013 2022-01-17 op strlcat(dirpath, f->fname, sizeof(dirpath));
1827 fb1a36c0 2022-01-09 op r = unlinkat(f->dir->fd, dirpath, AT_REMOVEDIR);
1828 fb1a36c0 2022-01-09 op } else /* file */
1829 543fc013 2022-01-17 op r = unlinkat(f->dir->fd, f->fname, 0);
1831 fb1a36c0 2022-01-09 op if (r == -1)
1832 fb1a36c0 2022-01-09 op np_errno(hdr->tag);
1834 fb1a36c0 2022-01-09 op np_remove(hdr->tag);
1836 fb1a36c0 2022-01-09 op free_fid(f);
1840 fb1a36c0 2022-01-09 op handle_message(struct imsg *imsg, size_t len)
1842 fb1a36c0 2022-01-09 op struct msg {
1843 fb1a36c0 2022-01-09 op uint8_t type;
1844 fb1a36c0 2022-01-09 op void (*fn)(struct np_msg_header *, const uint8_t *, size_t);
1845 fb1a36c0 2022-01-09 op } msgs[] = {
1846 fb1a36c0 2022-01-09 op {Tversion, tversion},
1847 fb1a36c0 2022-01-09 op {Tattach, tattach},
1848 fb1a36c0 2022-01-09 op {Tclunk, tclunk},
1849 fb1a36c0 2022-01-09 op {Tflush, tflush},
1850 fb1a36c0 2022-01-09 op {Twalk, twalk},
1851 fb1a36c0 2022-01-09 op {Topen, topen},
1852 fb1a36c0 2022-01-09 op {Tcreate, tcreate},
1853 fb1a36c0 2022-01-09 op {Tread, tread},
1854 fb1a36c0 2022-01-09 op {Twrite, twrite},
1855 fb1a36c0 2022-01-09 op {Tstat, tstat},
1856 755d75bf 2022-01-17 op {Twstat, twstat},
1857 fb1a36c0 2022-01-09 op {Tremove, tremove},
1859 fb1a36c0 2022-01-09 op struct np_msg_header hdr;
1861 fb1a36c0 2022-01-09 op uint8_t *data;
1863 fb1a36c0 2022-01-09 op #if DEBUG_PACKETS
1864 fb1a36c0 2022-01-09 op hexdump("incoming packet", imsg->data, len);
1867 fb1a36c0 2022-01-09 op parse_message(imsg->data, len, &hdr, &data);
1868 fb1a36c0 2022-01-09 op len -= HEADERSIZE;
1870 fb1a36c0 2022-01-09 op log_debug("got request: len=%d type=%d[%s] tag=%d",
1871 fb1a36c0 2022-01-09 op hdr.len, hdr.type, pp_msg_type(hdr.type), hdr.tag);
1873 fb1a36c0 2022-01-09 op if (!handshaked && hdr.type != Tversion) {
1874 fb1a36c0 2022-01-09 op client_send_listener(IMSG_CLOSE, NULL, 0);
1875 fb1a36c0 2022-01-09 op client_shutdown();
1879 fb1a36c0 2022-01-09 op for (i = 0; i < sizeof(msgs)/sizeof(msgs[0]); ++i) {
1880 fb1a36c0 2022-01-09 op if (msgs[i].type != hdr.type)
1883 fb1a36c0 2022-01-09 op msgs[i].fn(&hdr, data, len);
1887 fb1a36c0 2022-01-09 op np_error(hdr.tag, "Not supported.");