Print this page
XXXX adding PID information to netstat output
Split |
Close |
Expand all |
Collapse all |
--- old/usr/src/uts/common/fs/sockfs/sockcommon_vnops.c
+++ new/usr/src/uts/common/fs/sockfs/sockcommon_vnops.c
1 1 /*
2 2 * CDDL HEADER START
3 3 *
4 4 * The contents of this file are subject to the terms of the
5 5 * Common Development and Distribution License (the "License").
6 6 * You may not use this file except in compliance with the License.
7 7 *
8 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 9 * or http://www.opensolaris.org/os/licensing.
10 10 * See the License for the specific language governing permissions
11 11 * and limitations under the License.
12 12 *
13 13 * When distributing Covered Code, include this CDDL HEADER in each
14 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 15 * If applicable, add the following below this CDDL HEADER, with the
16 16 * fields enclosed by brackets "[]" replaced with your own identifying
17 17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 18 *
19 19 * CDDL HEADER END
20 20 */
21 21
22 22 /*
23 23 * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
24 24 * Use is subject to license terms.
25 25 */
26 26
27 27 #include <sys/types.h>
28 28 #include <sys/t_lock.h>
29 29 #include <sys/param.h>
30 30 #include <sys/systm.h>
31 31 #include <sys/bitmap.h>
32 32 #include <sys/debug.h>
33 33 #include <sys/errno.h>
34 34 #include <sys/strsubr.h>
35 35 #include <sys/cmn_err.h>
36 36 #include <sys/sysmacros.h>
37 37 #include <sys/filio.h>
38 38 #include <sys/flock.h>
39 39 #include <sys/stat.h>
40 40 #include <sys/share.h>
41 41
42 42 #include <sys/vfs.h>
43 43 #include <sys/vfs_opreg.h>
44 44
45 45 #include <sys/sockio.h>
46 46 #include <sys/socket.h>
47 47 #include <sys/socketvar.h>
48 48 #include <sys/strsun.h>
49 49
50 50 #include <fs/sockfs/sockcommon.h>
51 51 #include <fs/sockfs/socktpi.h>
52 52
53 53 /*
54 54 * Generic vnode ops
55 55 */
56 56 static int socket_vop_open(struct vnode **, int, struct cred *,
57 57 caller_context_t *);
58 58 static int socket_vop_close(struct vnode *, int, int, offset_t,
59 59 struct cred *, caller_context_t *);
60 60 static int socket_vop_read(struct vnode *, struct uio *, int,
61 61 struct cred *, caller_context_t *);
62 62 static int socket_vop_write(struct vnode *, struct uio *, int,
63 63 struct cred *, caller_context_t *);
64 64 static int socket_vop_ioctl(struct vnode *, int, intptr_t, int,
65 65 struct cred *, int32_t *, caller_context_t *);
66 66 static int socket_vop_setfl(struct vnode *, int, int, cred_t *,
67 67 caller_context_t *);
68 68 static int socket_vop_getattr(struct vnode *, struct vattr *, int,
69 69 struct cred *, caller_context_t *);
70 70 static int socket_vop_setattr(struct vnode *, struct vattr *, int,
71 71 struct cred *, caller_context_t *);
72 72 static int socket_vop_access(struct vnode *, int, int, struct cred *,
73 73 caller_context_t *);
74 74 static int socket_vop_fsync(struct vnode *, int, struct cred *,
75 75 caller_context_t *);
76 76 static void socket_vop_inactive(struct vnode *, struct cred *,
77 77 caller_context_t *);
78 78 static int socket_vop_fid(struct vnode *, struct fid *,
79 79 caller_context_t *);
80 80 static int socket_vop_seek(struct vnode *, offset_t, offset_t *,
81 81 caller_context_t *);
82 82 static int socket_vop_poll(struct vnode *, short, int, short *,
83 83 struct pollhead **, caller_context_t *);
84 84
85 85 extern int socket_close_internal(struct sonode *, int, cred_t *);
86 86 extern void socket_destroy_internal(struct sonode *, cred_t *);
87 87
88 88 struct vnodeops *socket_vnodeops;
89 89 const fs_operation_def_t socket_vnodeops_template[] = {
90 90 VOPNAME_OPEN, { .vop_open = socket_vop_open },
91 91 VOPNAME_CLOSE, { .vop_close = socket_vop_close },
92 92 VOPNAME_READ, { .vop_read = socket_vop_read },
93 93 VOPNAME_WRITE, { .vop_write = socket_vop_write },
94 94 VOPNAME_IOCTL, { .vop_ioctl = socket_vop_ioctl },
95 95 VOPNAME_SETFL, { .vop_setfl = socket_vop_setfl },
96 96 VOPNAME_GETATTR, { .vop_getattr = socket_vop_getattr },
97 97 VOPNAME_SETATTR, { .vop_setattr = socket_vop_setattr },
98 98 VOPNAME_ACCESS, { .vop_access = socket_vop_access },
99 99 VOPNAME_FSYNC, { .vop_fsync = socket_vop_fsync },
100 100 VOPNAME_INACTIVE, { .vop_inactive = socket_vop_inactive },
101 101 VOPNAME_FID, { .vop_fid = socket_vop_fid },
102 102 VOPNAME_SEEK, { .vop_seek = socket_vop_seek },
103 103 VOPNAME_POLL, { .vop_poll = socket_vop_poll },
104 104 VOPNAME_DISPOSE, { .error = fs_error },
105 105 NULL, NULL
106 106 };
107 107
108 108
109 109 /*
110 110 * generic vnode ops
111 111 */
112 112
113 113 /*ARGSUSED*/
114 114 static int
115 115 socket_vop_open(struct vnode **vpp, int flag, struct cred *cr,
↓ open down ↓ |
115 lines elided |
↑ open up ↑ |
116 116 caller_context_t *ct)
117 117 {
118 118 struct vnode *vp = *vpp;
119 119 struct sonode *so = VTOSO(vp);
120 120
121 121 flag &= ~FCREAT; /* paranoia */
122 122 mutex_enter(&so->so_lock);
123 123 so->so_count++;
124 124 mutex_exit(&so->so_lock);
125 125
126 + sonode_insert_pid(so, curproc);
127 +
126 128 ASSERT(so->so_count != 0); /* wraparound */
127 129 ASSERT(vp->v_type == VSOCK);
128 130
129 131 return (0);
130 132 }
131 133
132 134 /*ARGSUSED*/
133 135 static int
134 136 socket_vop_close(struct vnode *vp, int flag, int count, offset_t offset,
135 137 struct cred *cr, caller_context_t *ct)
136 138 {
137 139 struct sonode *so;
138 140 int error = 0;
139 141
140 142 so = VTOSO(vp);
141 143 ASSERT(vp->v_type == VSOCK);
142 144
143 145 cleanlocks(vp, ttoproc(curthread)->p_pid, 0);
144 146 cleanshares(vp, ttoproc(curthread)->p_pid);
145 147
146 148 if (vp->v_stream)
147 149 strclean(vp);
148 150
149 151 if (count > 1) {
150 152 dprint(2, ("socket_vop_close: count %d\n", count));
151 153 return (0);
152 154 }
153 155
154 156 mutex_enter(&so->so_lock);
155 157 if (--so->so_count == 0) {
156 158 /*
157 159 * Initiate connection shutdown.
158 160 */
159 161 mutex_exit(&so->so_lock);
160 162 error = socket_close_internal(so, flag, cr);
161 163 } else {
162 164 mutex_exit(&so->so_lock);
163 165 }
164 166
165 167 return (error);
166 168 }
167 169
168 170 /*ARGSUSED2*/
169 171 static int
170 172 socket_vop_read(struct vnode *vp, struct uio *uiop, int ioflag, struct cred *cr,
171 173 caller_context_t *ct)
172 174 {
173 175 struct sonode *so = VTOSO(vp);
174 176 struct nmsghdr lmsg;
175 177
176 178 ASSERT(vp->v_type == VSOCK);
177 179 bzero((void *)&lmsg, sizeof (lmsg));
178 180
179 181 return (socket_recvmsg(so, &lmsg, uiop, cr));
180 182 }
181 183
182 184 /*ARGSUSED2*/
183 185 static int
184 186 socket_vop_write(struct vnode *vp, struct uio *uiop, int ioflag,
185 187 struct cred *cr, caller_context_t *ct)
186 188 {
187 189 struct sonode *so = VTOSO(vp);
188 190 struct nmsghdr lmsg;
189 191
190 192 ASSERT(vp->v_type == VSOCK);
191 193 bzero((void *)&lmsg, sizeof (lmsg));
192 194
193 195 if (!(so->so_mode & SM_BYTESTREAM)) {
194 196 /*
195 197 * If the socket is not byte stream set MSG_EOR
196 198 */
197 199 lmsg.msg_flags = MSG_EOR;
198 200 }
199 201
200 202 return (socket_sendmsg(so, &lmsg, uiop, cr));
↓ open down ↓ |
65 lines elided |
↑ open up ↑ |
201 203 }
202 204
203 205 /*ARGSUSED4*/
204 206 static int
205 207 socket_vop_ioctl(struct vnode *vp, int cmd, intptr_t arg, int mode,
206 208 struct cred *cr, int32_t *rvalp, caller_context_t *ct)
207 209 {
208 210 struct sonode *so = VTOSO(vp);
209 211
210 212 ASSERT(vp->v_type == VSOCK);
213 +
214 + switch (cmd) {
215 + case F_FORKED: {
216 + if (cr != kcred)
217 + return (-1);
218 + sonode_insert_pid(so, (proc_t *)arg);
219 + return (0);
220 + }
221 +
222 + case F_CLOSED: {
223 + if (cr != kcred)
224 + return (-1);
225 + sonode_remove_pid(so, (proc_t *)arg);
226 + return (0);
227 + }
228 + }
211 229
212 230 return (socket_ioctl(so, cmd, arg, mode, cr, rvalp));
213 231 }
214 232
215 233 /*
216 234 * Allow any flags. Record FNDELAY and FNONBLOCK so that they can be inherited
217 235 * from listener to acceptor.
218 236 */
219 237 /* ARGSUSED */
220 238 static int
221 239 socket_vop_setfl(vnode_t *vp, int oflags, int nflags, cred_t *cr,
222 240 caller_context_t *ct)
223 241 {
224 242 struct sonode *so = VTOSO(vp);
225 243 int error = 0;
226 244
227 245 ASSERT(vp->v_type == VSOCK);
228 246
229 247 mutex_enter(&so->so_lock);
230 248 if (nflags & FNDELAY)
231 249 so->so_state |= SS_NDELAY;
232 250 else
233 251 so->so_state &= ~SS_NDELAY;
234 252 if (nflags & FNONBLOCK)
235 253 so->so_state |= SS_NONBLOCK;
236 254 else
237 255 so->so_state &= ~SS_NONBLOCK;
238 256 mutex_exit(&so->so_lock);
239 257
240 258 if (so->so_state & SS_ASYNC)
241 259 oflags |= FASYNC;
242 260 /*
243 261 * Sets/clears the SS_ASYNC flag based on the presence/absence
244 262 * of the FASYNC flag passed to fcntl(F_SETFL).
245 263 * This exists solely for BSD fcntl() FASYNC compatibility.
246 264 */
247 265 if ((oflags ^ nflags) & FASYNC && so->so_version != SOV_STREAM) {
248 266 int async = nflags & FASYNC;
249 267 int32_t rv;
250 268
251 269 /*
252 270 * For non-TPI sockets all we have to do is set/remove the
253 271 * SS_ASYNC bit, but for TPI it is more involved. For that
254 272 * reason we delegate the job to the protocol's ioctl handler.
255 273 */
256 274 error = socket_ioctl(so, FIOASYNC, (intptr_t)&async, FKIOCTL,
257 275 cr, &rv);
258 276 }
259 277 return (error);
260 278 }
261 279
262 280
263 281 /*
264 282 * Get the made up attributes for the vnode.
265 283 * 4.3BSD returns the current time for all the timestamps.
266 284 * 4.4BSD returns 0 for all the timestamps.
267 285 * Here we use the access and modified times recorded in the sonode.
268 286 *
269 287 * Just like in BSD there is not effect on the underlying file system node
270 288 * bound to an AF_UNIX pathname.
271 289 *
272 290 * When sockmod has been popped this will act just like a stream. Since
273 291 * a socket is always a clone there is no need to inspect the attributes
274 292 * of the "realvp".
275 293 */
276 294 /* ARGSUSED */
277 295 int
278 296 socket_vop_getattr(struct vnode *vp, struct vattr *vap, int flags,
279 297 struct cred *cr, caller_context_t *ct)
280 298 {
281 299 dev_t fsid;
282 300 struct sonode *so;
283 301 static int sonode_shift = 0;
284 302
285 303 /*
286 304 * Calculate the amount of bitshift to a sonode pointer which will
287 305 * still keep it unique. See below.
288 306 */
289 307 if (sonode_shift == 0)
290 308 sonode_shift = highbit(sizeof (struct sonode));
291 309 ASSERT(sonode_shift > 0);
292 310
293 311 so = VTOSO(vp);
294 312 fsid = sockdev;
295 313
296 314 if (so->so_version == SOV_STREAM) {
297 315 /*
298 316 * The imaginary "sockmod" has been popped - act
299 317 * as a stream
300 318 */
301 319 vap->va_type = VCHR;
302 320 vap->va_mode = 0;
303 321 } else {
304 322 vap->va_type = vp->v_type;
305 323 vap->va_mode = S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|
306 324 S_IROTH|S_IWOTH;
307 325 }
308 326 vap->va_uid = vap->va_gid = 0;
309 327 vap->va_fsid = fsid;
310 328 /*
311 329 * If the va_nodeid is > MAX_USHORT, then i386 stats might fail.
312 330 * So we shift down the sonode pointer to try and get the most
313 331 * uniqueness into 16-bits.
314 332 */
315 333 vap->va_nodeid = ((ino_t)so >> sonode_shift) & 0xFFFF;
316 334 vap->va_nlink = 0;
317 335 vap->va_size = 0;
318 336
319 337 /*
320 338 * We need to zero out the va_rdev to avoid some fstats getting
321 339 * EOVERFLOW. This also mimics SunOS 4.x and BSD behavior.
322 340 */
323 341 vap->va_rdev = (dev_t)0;
324 342 vap->va_blksize = MAXBSIZE;
325 343 vap->va_nblocks = btod(vap->va_size);
326 344
327 345 if (!SOCK_IS_NONSTR(so)) {
328 346 sotpi_info_t *sti = SOTOTPI(so);
329 347
330 348 mutex_enter(&so->so_lock);
331 349 vap->va_atime.tv_sec = sti->sti_atime;
332 350 vap->va_mtime.tv_sec = sti->sti_mtime;
333 351 vap->va_ctime.tv_sec = sti->sti_ctime;
334 352 mutex_exit(&so->so_lock);
335 353 } else {
336 354 vap->va_atime.tv_sec = 0;
337 355 vap->va_mtime.tv_sec = 0;
338 356 vap->va_ctime.tv_sec = 0;
339 357 }
340 358
341 359 vap->va_atime.tv_nsec = 0;
342 360 vap->va_mtime.tv_nsec = 0;
343 361 vap->va_ctime.tv_nsec = 0;
344 362 vap->va_seq = 0;
345 363
346 364 return (0);
347 365 }
348 366
349 367 /*
350 368 * Set attributes.
351 369 * Just like in BSD there is not effect on the underlying file system node
352 370 * bound to an AF_UNIX pathname.
353 371 *
354 372 * When sockmod has been popped this will act just like a stream. Since
355 373 * a socket is always a clone there is no need to modify the attributes
356 374 * of the "realvp".
357 375 */
358 376 /* ARGSUSED */
359 377 int
360 378 socket_vop_setattr(struct vnode *vp, struct vattr *vap, int flags,
361 379 struct cred *cr, caller_context_t *ct)
362 380 {
363 381 struct sonode *so = VTOSO(vp);
364 382
365 383 /*
366 384 * If times were changed, and we have a STREAMS socket, then update
367 385 * the sonode.
368 386 */
369 387 if (!SOCK_IS_NONSTR(so)) {
370 388 sotpi_info_t *sti = SOTOTPI(so);
371 389
372 390 mutex_enter(&so->so_lock);
373 391 if (vap->va_mask & AT_ATIME)
374 392 sti->sti_atime = vap->va_atime.tv_sec;
375 393 if (vap->va_mask & AT_MTIME) {
376 394 sti->sti_mtime = vap->va_mtime.tv_sec;
377 395 sti->sti_ctime = gethrestime_sec();
378 396 }
379 397 mutex_exit(&so->so_lock);
380 398 }
381 399
382 400 return (0);
383 401 }
384 402
385 403 /*
386 404 * Check if user is allowed to access vp. For non-STREAMS based sockets,
387 405 * there might not be a device attached to the file system. So for those
388 406 * types of sockets there are no permissions to check.
389 407 *
390 408 * XXX Should there be some other mechanism to check access rights?
391 409 */
392 410 /*ARGSUSED*/
393 411 int
394 412 socket_vop_access(struct vnode *vp, int mode, int flags, struct cred *cr,
395 413 caller_context_t *ct)
396 414 {
397 415 struct sonode *so = VTOSO(vp);
398 416
399 417 if (!SOCK_IS_NONSTR(so)) {
400 418 ASSERT(so->so_sockparams->sp_sdev_info.sd_vnode != NULL);
401 419 return (VOP_ACCESS(so->so_sockparams->sp_sdev_info.sd_vnode,
402 420 mode, flags, cr, NULL));
403 421 }
404 422 return (0);
405 423 }
406 424
407 425 /*
408 426 * 4.3BSD and 4.4BSD fail a fsync on a socket with EINVAL.
409 427 * This code does the same to be compatible and also to not give an
410 428 * application the impression that the data has actually been "synced"
411 429 * to the other end of the connection.
412 430 */
413 431 /* ARGSUSED */
414 432 int
415 433 socket_vop_fsync(struct vnode *vp, int syncflag, struct cred *cr,
416 434 caller_context_t *ct)
417 435 {
418 436 return (EINVAL);
419 437 }
420 438
421 439 /*ARGSUSED*/
422 440 static void
423 441 socket_vop_inactive(struct vnode *vp, struct cred *cr, caller_context_t *ct)
424 442 {
425 443 struct sonode *so = VTOSO(vp);
426 444
427 445 ASSERT(vp->v_type == VSOCK);
428 446
429 447 mutex_enter(&vp->v_lock);
430 448 /*
431 449 * If no one has reclaimed the vnode, remove from the
432 450 * cache now.
433 451 */
434 452 if (vp->v_count < 1)
435 453 cmn_err(CE_PANIC, "socket_inactive: Bad v_count");
436 454
437 455 /*
438 456 * Drop the temporary hold by vn_rele now
439 457 */
440 458 if (--vp->v_count != 0) {
441 459 mutex_exit(&vp->v_lock);
442 460 return;
443 461 }
444 462 mutex_exit(&vp->v_lock);
445 463
446 464
447 465 ASSERT(!vn_has_cached_data(vp));
448 466
449 467 /* socket specfic clean-up */
450 468 socket_destroy_internal(so, cr);
451 469 }
452 470
453 471 /* ARGSUSED */
454 472 int
455 473 socket_vop_fid(struct vnode *vp, struct fid *fidp, caller_context_t *ct)
456 474 {
457 475 return (EINVAL);
458 476 }
459 477
460 478 /*
461 479 * Sockets are not seekable.
462 480 * (and there is a bug to fix STREAMS to make them fail this as well).
463 481 */
464 482 /*ARGSUSED*/
465 483 int
466 484 socket_vop_seek(struct vnode *vp, offset_t ooff, offset_t *noffp,
467 485 caller_context_t *ct)
468 486 {
469 487 return (ESPIPE);
470 488 }
471 489
472 490 /*ARGSUSED*/
473 491 static int
474 492 socket_vop_poll(struct vnode *vp, short events, int anyyet, short *reventsp,
475 493 struct pollhead **phpp, caller_context_t *ct)
476 494 {
477 495 struct sonode *so = VTOSO(vp);
478 496
479 497 ASSERT(vp->v_type == VSOCK);
480 498
481 499 return (socket_poll(so, events, anyyet, reventsp, phpp));
482 500 }
↓ open down ↓ |
262 lines elided |
↑ open up ↑ |
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX