| 1 | /* |
| 2 | * Copyright (c) 1982, 1986, 1989, 1990, 1993 |
| 3 | * The Regents of the University of California. All rights reserved. |
| 4 | * |
| 5 | * sendfile(2) and related extensions: |
| 6 | * Copyright (c) 1998, David Greenman. All rights reserved. |
| 7 | * |
| 8 | * Redistribution and use in source and binary forms, with or without |
| 9 | * modification, are permitted provided that the following conditions |
| 10 | * are met: |
| 11 | * 1. Redistributions of source code must retain the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer. |
| 13 | * 2. Redistributions in binary form must reproduce the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer in the |
| 15 | * documentation and/or other materials provided with the distribution. |
| 16 | * 3. All advertising materials mentioning features or use of this software |
| 17 | * must display the following acknowledgement: |
| 18 | * This product includes software developed by the University of |
| 19 | * California, Berkeley and its contributors. |
| 20 | * 4. Neither the name of the University nor the names of its contributors |
| 21 | * may be used to endorse or promote products derived from this software |
| 22 | * without specific prior written permission. |
| 23 | * |
| 24 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 25 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 26 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 27 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 28 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 29 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 30 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 31 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 32 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 33 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 34 | * SUCH DAMAGE. |
| 35 | * |
| 36 | * @(#)uipc_syscalls.c 8.4 (Berkeley) 2/21/94 |
| 37 | * $FreeBSD: src/sys/kern/uipc_syscalls.c,v 1.65.2.17 2003/04/04 17:11:16 tegge Exp $ |
| 38 | * $DragonFly: src/sys/kern/uipc_syscalls.c,v 1.4 2003/06/25 03:55:57 dillon Exp $ |
| 39 | */ |
| 40 | |
| 41 | #include "opt_compat.h" |
| 42 | #include "opt_ktrace.h" |
| 43 | |
| 44 | #include <sys/param.h> |
| 45 | #include <sys/systm.h> |
| 46 | #include <sys/kernel.h> |
| 47 | #include <sys/sysproto.h> |
| 48 | #include <sys/malloc.h> |
| 49 | #include <sys/filedesc.h> |
| 50 | #include <sys/event.h> |
| 51 | #include <sys/proc.h> |
| 52 | #include <sys/fcntl.h> |
| 53 | #include <sys/file.h> |
| 54 | #include <sys/filio.h> |
| 55 | #include <sys/mbuf.h> |
| 56 | #include <sys/protosw.h> |
| 57 | #include <sys/socket.h> |
| 58 | #include <sys/socketvar.h> |
| 59 | #include <sys/signalvar.h> |
| 60 | #include <sys/uio.h> |
| 61 | #include <sys/vnode.h> |
| 62 | #include <sys/lock.h> |
| 63 | #include <sys/mount.h> |
| 64 | #ifdef KTRACE |
| 65 | #include <sys/ktrace.h> |
| 66 | #endif |
| 67 | #include <vm/vm.h> |
| 68 | #include <vm/vm_object.h> |
| 69 | #include <vm/vm_page.h> |
| 70 | #include <vm/vm_pageout.h> |
| 71 | #include <vm/vm_kern.h> |
| 72 | #include <vm/vm_extern.h> |
| 73 | #include <sys/file2.h> |
| 74 | |
| 75 | static void sf_buf_init(void *arg); |
| 76 | SYSINIT(sock_sf, SI_SUB_MBUF, SI_ORDER_ANY, sf_buf_init, NULL) |
| 77 | |
| 78 | static int sendit __P((int s, struct msghdr *mp, int flags)); |
| 79 | static int recvit __P((int s, struct msghdr *mp, |
| 80 | caddr_t namelenp)); |
| 81 | |
| 82 | static int accept1 __P((struct accept_args *uap, int compat)); |
| 83 | static int do_sendfile __P((struct sendfile_args *uap, int compat)); |
| 84 | static int getsockname1 __P((struct getsockname_args *uap, int compat)); |
| 85 | static int getpeername1 __P((struct getpeername_args *uap, int compat)); |
| 86 | |
| 87 | static SLIST_HEAD(, sf_buf) sf_freelist; |
| 88 | static vm_offset_t sf_base; |
| 89 | static struct sf_buf *sf_bufs; |
| 90 | static int sf_buf_alloc_want; |
| 91 | |
| 92 | /* |
| 93 | * System call interface to the socket abstraction. |
| 94 | */ |
| 95 | #if defined(COMPAT_43) || defined(COMPAT_SUNOS) |
| 96 | #define COMPAT_OLDSOCK |
| 97 | #endif |
| 98 | |
| 99 | extern struct fileops socketops; |
| 100 | |
| 101 | /* |
| 102 | * socket_args(int domain, int type, int protocol) |
| 103 | */ |
| 104 | int |
| 105 | socket(struct socket_args *uap) |
| 106 | { |
| 107 | struct thread *td = curthread; |
| 108 | struct proc *p = td->td_proc; |
| 109 | struct filedesc *fdp; |
| 110 | struct socket *so; |
| 111 | struct file *fp; |
| 112 | int fd, error; |
| 113 | |
| 114 | KKASSERT(p); |
| 115 | fdp = p->p_fd; |
| 116 | |
| 117 | error = falloc(p, &fp, &fd); |
| 118 | if (error) |
| 119 | return (error); |
| 120 | fhold(fp); |
| 121 | error = socreate(uap->domain, &so, uap->type, uap->protocol, td); |
| 122 | if (error) { |
| 123 | if (fdp->fd_ofiles[fd] == fp) { |
| 124 | fdp->fd_ofiles[fd] = NULL; |
| 125 | fdrop(fp, td); |
| 126 | } |
| 127 | } else { |
| 128 | fp->f_data = (caddr_t)so; |
| 129 | fp->f_flag = FREAD|FWRITE; |
| 130 | fp->f_ops = &socketops; |
| 131 | fp->f_type = DTYPE_SOCKET; |
| 132 | p->p_retval[0] = fd; |
| 133 | } |
| 134 | fdrop(fp, td); |
| 135 | return (error); |
| 136 | } |
| 137 | |
| 138 | /* |
| 139 | * bind_args(int s, caddr_t name, int namelen) |
| 140 | * |
| 141 | */ |
| 142 | /* ARGSUSED */ |
| 143 | int |
| 144 | bind(struct bind_args *uap) |
| 145 | { |
| 146 | struct thread *td = curthread; |
| 147 | struct proc *p = td->td_proc; |
| 148 | struct file *fp; |
| 149 | struct sockaddr *sa; |
| 150 | int error; |
| 151 | |
| 152 | KKASSERT(p); |
| 153 | error = holdsock(p->p_fd, uap->s, &fp); |
| 154 | if (error) |
| 155 | return (error); |
| 156 | error = getsockaddr(&sa, uap->name, uap->namelen); |
| 157 | if (error) { |
| 158 | fdrop(fp, td); |
| 159 | return (error); |
| 160 | } |
| 161 | error = sobind((struct socket *)fp->f_data, sa, td); |
| 162 | FREE(sa, M_SONAME); |
| 163 | fdrop(fp, td); |
| 164 | return (error); |
| 165 | } |
| 166 | |
| 167 | /* |
| 168 | * listen_args(int s, int backlog) |
| 169 | */ |
| 170 | /* ARGSUSED */ |
| 171 | int |
| 172 | listen(struct listen_args *uap) |
| 173 | { |
| 174 | struct thread *td = curthread; |
| 175 | struct proc *p = td->td_proc; |
| 176 | struct file *fp; |
| 177 | int error; |
| 178 | |
| 179 | KKASSERT(p); |
| 180 | error = holdsock(p->p_fd, uap->s, &fp); |
| 181 | if (error) |
| 182 | return (error); |
| 183 | error = solisten((struct socket *)fp->f_data, uap->backlog, td); |
| 184 | fdrop(fp, td); |
| 185 | return(error); |
| 186 | } |
| 187 | |
| 188 | /* |
| 189 | * accept_args(int s, caddr_t name, int *anamelen) |
| 190 | */ |
| 191 | static int |
| 192 | accept1(struct accept_args *uap, int compat) |
| 193 | { |
| 194 | struct thread *td = curthread; |
| 195 | struct proc *p = td->td_proc; |
| 196 | struct filedesc *fdp = p->p_fd; |
| 197 | struct file *lfp = NULL; |
| 198 | struct file *nfp = NULL; |
| 199 | struct sockaddr *sa; |
| 200 | int namelen, error, s; |
| 201 | struct socket *head, *so; |
| 202 | int fd; |
| 203 | u_int fflag; /* type must match fp->f_flag */ |
| 204 | int tmp; |
| 205 | |
| 206 | if (uap->name) { |
| 207 | error = copyin((caddr_t)uap->anamelen, (caddr_t)&namelen, |
| 208 | sizeof (namelen)); |
| 209 | if(error) |
| 210 | return (error); |
| 211 | if (namelen < 0) |
| 212 | return (EINVAL); |
| 213 | } |
| 214 | error = holdsock(fdp, uap->s, &lfp); |
| 215 | if (error) |
| 216 | return (error); |
| 217 | s = splnet(); |
| 218 | head = (struct socket *)lfp->f_data; |
| 219 | if ((head->so_options & SO_ACCEPTCONN) == 0) { |
| 220 | splx(s); |
| 221 | error = EINVAL; |
| 222 | goto done; |
| 223 | } |
| 224 | while (TAILQ_EMPTY(&head->so_comp) && head->so_error == 0) { |
| 225 | if (head->so_state & SS_CANTRCVMORE) { |
| 226 | head->so_error = ECONNABORTED; |
| 227 | break; |
| 228 | } |
| 229 | if ((head->so_state & SS_NBIO) != 0) { |
| 230 | head->so_error = EWOULDBLOCK; |
| 231 | break; |
| 232 | } |
| 233 | error = tsleep((caddr_t)&head->so_timeo, PSOCK | PCATCH, |
| 234 | "accept", 0); |
| 235 | if (error) { |
| 236 | splx(s); |
| 237 | goto done; |
| 238 | } |
| 239 | } |
| 240 | if (head->so_error) { |
| 241 | error = head->so_error; |
| 242 | head->so_error = 0; |
| 243 | splx(s); |
| 244 | goto done; |
| 245 | } |
| 246 | |
| 247 | /* |
| 248 | * At this point we know that there is at least one connection |
| 249 | * ready to be accepted. Remove it from the queue prior to |
| 250 | * allocating the file descriptor for it since falloc() may |
| 251 | * block allowing another process to accept the connection |
| 252 | * instead. |
| 253 | */ |
| 254 | so = TAILQ_FIRST(&head->so_comp); |
| 255 | TAILQ_REMOVE(&head->so_comp, so, so_list); |
| 256 | head->so_qlen--; |
| 257 | |
| 258 | fflag = lfp->f_flag; |
| 259 | error = falloc(p, &nfp, &fd); |
| 260 | if (error) { |
| 261 | /* |
| 262 | * Probably ran out of file descriptors. Put the |
| 263 | * unaccepted connection back onto the queue and |
| 264 | * do another wakeup so some other process might |
| 265 | * have a chance at it. |
| 266 | */ |
| 267 | TAILQ_INSERT_HEAD(&head->so_comp, so, so_list); |
| 268 | head->so_qlen++; |
| 269 | wakeup_one(&head->so_timeo); |
| 270 | splx(s); |
| 271 | goto done; |
| 272 | } |
| 273 | fhold(nfp); |
| 274 | p->p_retval[0] = fd; |
| 275 | |
| 276 | /* connection has been removed from the listen queue */ |
| 277 | KNOTE(&head->so_rcv.sb_sel.si_note, 0); |
| 278 | |
| 279 | so->so_state &= ~SS_COMP; |
| 280 | so->so_head = NULL; |
| 281 | if (head->so_sigio != NULL) |
| 282 | fsetown(fgetown(head->so_sigio), &so->so_sigio); |
| 283 | |
| 284 | nfp->f_data = (caddr_t)so; |
| 285 | nfp->f_flag = fflag; |
| 286 | nfp->f_ops = &socketops; |
| 287 | nfp->f_type = DTYPE_SOCKET; |
| 288 | /* Sync socket nonblocking/async state with file flags */ |
| 289 | tmp = fflag & FNONBLOCK; |
| 290 | (void) fo_ioctl(nfp, FIONBIO, (caddr_t)&tmp, td); |
| 291 | tmp = fflag & FASYNC; |
| 292 | (void) fo_ioctl(nfp, FIOASYNC, (caddr_t)&tmp, td); |
| 293 | sa = 0; |
| 294 | error = soaccept(so, &sa); |
| 295 | if (error) { |
| 296 | /* |
| 297 | * return a namelen of zero for older code which might |
| 298 | * ignore the return value from accept. |
| 299 | */ |
| 300 | if (uap->name != NULL) { |
| 301 | namelen = 0; |
| 302 | (void) copyout((caddr_t)&namelen, |
| 303 | (caddr_t)uap->anamelen, sizeof(*uap->anamelen)); |
| 304 | } |
| 305 | goto noconnection; |
| 306 | } |
| 307 | if (sa == NULL) { |
| 308 | namelen = 0; |
| 309 | if (uap->name) |
| 310 | goto gotnoname; |
| 311 | splx(s); |
| 312 | error = 0; |
| 313 | goto done; |
| 314 | } |
| 315 | if (uap->name) { |
| 316 | /* check sa_len before it is destroyed */ |
| 317 | if (namelen > sa->sa_len) |
| 318 | namelen = sa->sa_len; |
| 319 | #ifdef COMPAT_OLDSOCK |
| 320 | if (compat) |
| 321 | ((struct osockaddr *)sa)->sa_family = |
| 322 | sa->sa_family; |
| 323 | #endif |
| 324 | error = copyout(sa, (caddr_t)uap->name, (u_int)namelen); |
| 325 | if (!error) |
| 326 | gotnoname: |
| 327 | error = copyout((caddr_t)&namelen, |
| 328 | (caddr_t)uap->anamelen, sizeof (*uap->anamelen)); |
| 329 | } |
| 330 | noconnection: |
| 331 | if (sa) |
| 332 | FREE(sa, M_SONAME); |
| 333 | |
| 334 | /* |
| 335 | * close the new descriptor, assuming someone hasn't ripped it |
| 336 | * out from under us. |
| 337 | */ |
| 338 | if (error) { |
| 339 | if (fdp->fd_ofiles[fd] == nfp) { |
| 340 | fdp->fd_ofiles[fd] = NULL; |
| 341 | fdrop(nfp, td); |
| 342 | } |
| 343 | } |
| 344 | splx(s); |
| 345 | |
| 346 | /* |
| 347 | * Release explicitly held references before returning. |
| 348 | */ |
| 349 | done: |
| 350 | if (nfp != NULL) |
| 351 | fdrop(nfp, td); |
| 352 | fdrop(lfp, td); |
| 353 | return (error); |
| 354 | } |
| 355 | |
| 356 | int |
| 357 | accept(struct accept_args *uap) |
| 358 | { |
| 359 | return (accept1(uap, 0)); |
| 360 | } |
| 361 | |
| 362 | #ifdef COMPAT_OLDSOCK |
| 363 | int |
| 364 | oaccept(struct accept_args *uap) |
| 365 | { |
| 366 | |
| 367 | return (accept1(uap, 1)); |
| 368 | } |
| 369 | #endif /* COMPAT_OLDSOCK */ |
| 370 | |
| 371 | /* |
| 372 | * connect_args(int s, caddr_t name, int namelen) |
| 373 | */ |
| 374 | /* ARGSUSED */ |
| 375 | int |
| 376 | connect(struct connect_args *uap) |
| 377 | { |
| 378 | struct thread *td = curthread; |
| 379 | struct proc *p = td->td_proc; |
| 380 | struct file *fp; |
| 381 | struct socket *so; |
| 382 | struct sockaddr *sa; |
| 383 | int error, s; |
| 384 | |
| 385 | error = holdsock(p->p_fd, uap->s, &fp); |
| 386 | if (error) |
| 387 | return (error); |
| 388 | so = (struct socket *)fp->f_data; |
| 389 | if ((so->so_state & SS_NBIO) && (so->so_state & SS_ISCONNECTING)) { |
| 390 | error = EALREADY; |
| 391 | goto done; |
| 392 | } |
| 393 | error = getsockaddr(&sa, uap->name, uap->namelen); |
| 394 | if (error) |
| 395 | goto done; |
| 396 | error = soconnect(so, sa, td); |
| 397 | if (error) |
| 398 | goto bad; |
| 399 | if ((so->so_state & SS_NBIO) && (so->so_state & SS_ISCONNECTING)) { |
| 400 | FREE(sa, M_SONAME); |
| 401 | error = EINPROGRESS; |
| 402 | goto done; |
| 403 | } |
| 404 | s = splnet(); |
| 405 | while ((so->so_state & SS_ISCONNECTING) && so->so_error == 0) { |
| 406 | error = tsleep((caddr_t)&so->so_timeo, PSOCK | PCATCH, |
| 407 | "connec", 0); |
| 408 | if (error) |
| 409 | break; |
| 410 | } |
| 411 | if (error == 0) { |
| 412 | error = so->so_error; |
| 413 | so->so_error = 0; |
| 414 | } |
| 415 | splx(s); |
| 416 | bad: |
| 417 | so->so_state &= ~SS_ISCONNECTING; |
| 418 | FREE(sa, M_SONAME); |
| 419 | if (error == ERESTART) |
| 420 | error = EINTR; |
| 421 | done: |
| 422 | fdrop(fp, td); |
| 423 | return (error); |
| 424 | } |
| 425 | |
| 426 | /* |
| 427 | * socketpair(int domain, int type, int protocol, int *rsv) |
| 428 | */ |
| 429 | int |
| 430 | socketpair(struct socketpair_args *uap) |
| 431 | { |
| 432 | struct thread *td = curthread; |
| 433 | struct proc *p = td->td_proc; |
| 434 | struct filedesc *fdp; |
| 435 | struct file *fp1, *fp2; |
| 436 | struct socket *so1, *so2; |
| 437 | int fd, error, sv[2]; |
| 438 | |
| 439 | KKASSERT(p); |
| 440 | fdp = p->p_fd; |
| 441 | error = socreate(uap->domain, &so1, uap->type, uap->protocol, td); |
| 442 | if (error) |
| 443 | return (error); |
| 444 | error = socreate(uap->domain, &so2, uap->type, uap->protocol, td); |
| 445 | if (error) |
| 446 | goto free1; |
| 447 | error = falloc(p, &fp1, &fd); |
| 448 | if (error) |
| 449 | goto free2; |
| 450 | fhold(fp1); |
| 451 | sv[0] = fd; |
| 452 | fp1->f_data = (caddr_t)so1; |
| 453 | error = falloc(p, &fp2, &fd); |
| 454 | if (error) |
| 455 | goto free3; |
| 456 | fhold(fp2); |
| 457 | fp2->f_data = (caddr_t)so2; |
| 458 | sv[1] = fd; |
| 459 | error = soconnect2(so1, so2); |
| 460 | if (error) |
| 461 | goto free4; |
| 462 | if (uap->type == SOCK_DGRAM) { |
| 463 | /* |
| 464 | * Datagram socket connection is asymmetric. |
| 465 | */ |
| 466 | error = soconnect2(so2, so1); |
| 467 | if (error) |
| 468 | goto free4; |
| 469 | } |
| 470 | fp1->f_flag = fp2->f_flag = FREAD|FWRITE; |
| 471 | fp1->f_ops = fp2->f_ops = &socketops; |
| 472 | fp1->f_type = fp2->f_type = DTYPE_SOCKET; |
| 473 | error = copyout((caddr_t)sv, (caddr_t)uap->rsv, 2 * sizeof (int)); |
| 474 | fdrop(fp1, td); |
| 475 | fdrop(fp2, td); |
| 476 | return (error); |
| 477 | free4: |
| 478 | if (fdp->fd_ofiles[sv[1]] == fp2) { |
| 479 | fdp->fd_ofiles[sv[1]] = NULL; |
| 480 | fdrop(fp2, td); |
| 481 | } |
| 482 | fdrop(fp2, td); |
| 483 | free3: |
| 484 | if (fdp->fd_ofiles[sv[0]] == fp1) { |
| 485 | fdp->fd_ofiles[sv[0]] = NULL; |
| 486 | fdrop(fp1, td); |
| 487 | } |
| 488 | fdrop(fp1, td); |
| 489 | free2: |
| 490 | (void)soclose(so2); |
| 491 | free1: |
| 492 | (void)soclose(so1); |
| 493 | return (error); |
| 494 | } |
| 495 | |
| 496 | static int |
| 497 | sendit(int s, struct msghdr *mp, int flags) |
| 498 | { |
| 499 | struct thread *td = curthread; |
| 500 | struct proc *p = td->td_proc; |
| 501 | struct file *fp; |
| 502 | struct uio auio; |
| 503 | register struct iovec *iov; |
| 504 | register int i; |
| 505 | struct mbuf *control; |
| 506 | struct sockaddr *to; |
| 507 | int len, error; |
| 508 | struct socket *so; |
| 509 | #ifdef KTRACE |
| 510 | struct iovec *ktriov = NULL; |
| 511 | struct uio ktruio; |
| 512 | #endif |
| 513 | |
| 514 | error = holdsock(p->p_fd, s, &fp); |
| 515 | if (error) |
| 516 | return (error); |
| 517 | auio.uio_iov = mp->msg_iov; |
| 518 | auio.uio_iovcnt = mp->msg_iovlen; |
| 519 | auio.uio_segflg = UIO_USERSPACE; |
| 520 | auio.uio_rw = UIO_WRITE; |
| 521 | auio.uio_td = td; |
| 522 | auio.uio_offset = 0; /* XXX */ |
| 523 | auio.uio_resid = 0; |
| 524 | iov = mp->msg_iov; |
| 525 | for (i = 0; i < mp->msg_iovlen; i++, iov++) { |
| 526 | if ((auio.uio_resid += iov->iov_len) < 0) { |
| 527 | fdrop(fp, td); |
| 528 | return (EINVAL); |
| 529 | } |
| 530 | } |
| 531 | if (mp->msg_name) { |
| 532 | error = getsockaddr(&to, mp->msg_name, mp->msg_namelen); |
| 533 | if (error) { |
| 534 | fdrop(fp, td); |
| 535 | return (error); |
| 536 | } |
| 537 | } else { |
| 538 | to = 0; |
| 539 | } |
| 540 | if (mp->msg_control) { |
| 541 | if (mp->msg_controllen < sizeof(struct cmsghdr) |
| 542 | #ifdef COMPAT_OLDSOCK |
| 543 | && mp->msg_flags != MSG_COMPAT |
| 544 | #endif |
| 545 | ) { |
| 546 | error = EINVAL; |
| 547 | goto bad; |
| 548 | } |
| 549 | error = sockargs(&control, mp->msg_control, |
| 550 | mp->msg_controllen, MT_CONTROL); |
| 551 | if (error) |
| 552 | goto bad; |
| 553 | #ifdef COMPAT_OLDSOCK |
| 554 | if (mp->msg_flags == MSG_COMPAT) { |
| 555 | register struct cmsghdr *cm; |
| 556 | |
| 557 | M_PREPEND(control, sizeof(*cm), M_WAIT); |
| 558 | if (control == 0) { |
| 559 | error = ENOBUFS; |
| 560 | goto bad; |
| 561 | } else { |
| 562 | cm = mtod(control, struct cmsghdr *); |
| 563 | cm->cmsg_len = control->m_len; |
| 564 | cm->cmsg_level = SOL_SOCKET; |
| 565 | cm->cmsg_type = SCM_RIGHTS; |
| 566 | } |
| 567 | } |
| 568 | #endif |
| 569 | } else { |
| 570 | control = 0; |
| 571 | } |
| 572 | #ifdef KTRACE |
| 573 | if (KTRPOINT(td, KTR_GENIO)) { |
| 574 | int iovlen = auio.uio_iovcnt * sizeof (struct iovec); |
| 575 | |
| 576 | MALLOC(ktriov, struct iovec *, iovlen, M_TEMP, M_WAITOK); |
| 577 | bcopy((caddr_t)auio.uio_iov, (caddr_t)ktriov, iovlen); |
| 578 | ktruio = auio; |
| 579 | } |
| 580 | #endif |
| 581 | len = auio.uio_resid; |
| 582 | so = (struct socket *)fp->f_data; |
| 583 | error = so->so_proto->pr_usrreqs->pru_sosend(so, to, &auio, 0, control, |
| 584 | flags, td); |
| 585 | if (error) { |
| 586 | if (auio.uio_resid != len && (error == ERESTART || |
| 587 | error == EINTR || error == EWOULDBLOCK)) |
| 588 | error = 0; |
| 589 | if (error == EPIPE) |
| 590 | psignal(p, SIGPIPE); |
| 591 | } |
| 592 | if (error == 0) |
| 593 | p->p_retval[0] = len - auio.uio_resid; |
| 594 | #ifdef KTRACE |
| 595 | if (ktriov != NULL) { |
| 596 | if (error == 0) { |
| 597 | ktruio.uio_iov = ktriov; |
| 598 | ktruio.uio_resid = p->p_retval[0]; |
| 599 | ktrgenio(p->p_tracep, s, UIO_WRITE, &ktruio, error); |
| 600 | } |
| 601 | FREE(ktriov, M_TEMP); |
| 602 | } |
| 603 | #endif |
| 604 | bad: |
| 605 | fdrop(fp, td); |
| 606 | if (to) |
| 607 | FREE(to, M_SONAME); |
| 608 | return (error); |
| 609 | } |
| 610 | |
| 611 | /* |
| 612 | * sendto_args(int s, caddr_t buf, size_t len, int flags, caddr_t to, int tolen) |
| 613 | */ |
| 614 | int |
| 615 | sendto(struct sendto_args *uap) |
| 616 | { |
| 617 | struct msghdr msg; |
| 618 | struct iovec aiov; |
| 619 | |
| 620 | msg.msg_name = uap->to; |
| 621 | msg.msg_namelen = uap->tolen; |
| 622 | msg.msg_iov = &aiov; |
| 623 | msg.msg_iovlen = 1; |
| 624 | msg.msg_control = 0; |
| 625 | #ifdef COMPAT_OLDSOCK |
| 626 | msg.msg_flags = 0; |
| 627 | #endif |
| 628 | aiov.iov_base = uap->buf; |
| 629 | aiov.iov_len = uap->len; |
| 630 | return (sendit(uap->s, &msg, uap->flags)); |
| 631 | } |
| 632 | |
| 633 | #ifdef COMPAT_OLDSOCK |
| 634 | /* |
| 635 | * osend_args(int s, caddr_t buf, int len, int flags) |
| 636 | */ |
| 637 | int |
| 638 | osend(struct osend_args *uap) |
| 639 | { |
| 640 | struct msghdr msg; |
| 641 | struct iovec aiov; |
| 642 | |
| 643 | msg.msg_name = 0; |
| 644 | msg.msg_namelen = 0; |
| 645 | msg.msg_iov = &aiov; |
| 646 | msg.msg_iovlen = 1; |
| 647 | aiov.iov_base = uap->buf; |
| 648 | aiov.iov_len = uap->len; |
| 649 | msg.msg_control = 0; |
| 650 | msg.msg_flags = 0; |
| 651 | return (sendit(uap->s, &msg, uap->flags)); |
| 652 | } |
| 653 | |
| 654 | /* |
| 655 | * osendmsg_args(int s, caddr_t msg, int flags) |
| 656 | */ |
| 657 | int |
| 658 | osendmsg(struct osendmsg_args *uap) |
| 659 | { |
| 660 | struct msghdr msg; |
| 661 | struct iovec aiov[UIO_SMALLIOV], *iov; |
| 662 | int error; |
| 663 | |
| 664 | error = copyin(uap->msg, (caddr_t)&msg, sizeof (struct omsghdr)); |
| 665 | if (error) |
| 666 | return (error); |
| 667 | if ((u_int)msg.msg_iovlen >= UIO_SMALLIOV) { |
| 668 | if ((u_int)msg.msg_iovlen >= UIO_MAXIOV) |
| 669 | return (EMSGSIZE); |
| 670 | MALLOC(iov, struct iovec *, |
| 671 | sizeof(struct iovec) * (u_int)msg.msg_iovlen, M_IOV, |
| 672 | M_WAITOK); |
| 673 | } else |
| 674 | iov = aiov; |
| 675 | error = copyin((caddr_t)msg.msg_iov, (caddr_t)iov, |
| 676 | (unsigned)(msg.msg_iovlen * sizeof (struct iovec))); |
| 677 | if (error) |
| 678 | goto done; |
| 679 | msg.msg_flags = MSG_COMPAT; |
| 680 | msg.msg_iov = iov; |
| 681 | error = sendit(uap->s, &msg, uap->flags); |
| 682 | done: |
| 683 | if (iov != aiov) |
| 684 | FREE(iov, M_IOV); |
| 685 | return (error); |
| 686 | } |
| 687 | #endif |
| 688 | |
| 689 | /* |
| 690 | * sendmsg_args(int s, caddr_t msg, int flags) |
| 691 | */ |
| 692 | int |
| 693 | sendmsg(struct sendmsg_args *uap) |
| 694 | { |
| 695 | struct msghdr msg; |
| 696 | struct iovec aiov[UIO_SMALLIOV], *iov; |
| 697 | int error; |
| 698 | |
| 699 | error = copyin(uap->msg, (caddr_t)&msg, sizeof (msg)); |
| 700 | if (error) |
| 701 | return (error); |
| 702 | if ((u_int)msg.msg_iovlen >= UIO_SMALLIOV) { |
| 703 | if ((u_int)msg.msg_iovlen >= UIO_MAXIOV) |
| 704 | return (EMSGSIZE); |
| 705 | MALLOC(iov, struct iovec *, |
| 706 | sizeof(struct iovec) * (u_int)msg.msg_iovlen, M_IOV, |
| 707 | M_WAITOK); |
| 708 | } else |
| 709 | iov = aiov; |
| 710 | if (msg.msg_iovlen && |
| 711 | (error = copyin((caddr_t)msg.msg_iov, (caddr_t)iov, |
| 712 | (unsigned)(msg.msg_iovlen * sizeof (struct iovec))))) |
| 713 | goto done; |
| 714 | msg.msg_iov = iov; |
| 715 | #ifdef COMPAT_OLDSOCK |
| 716 | msg.msg_flags = 0; |
| 717 | #endif |
| 718 | error = sendit(uap->s, &msg, uap->flags); |
| 719 | done: |
| 720 | if (iov != aiov) |
| 721 | FREE(iov, M_IOV); |
| 722 | return (error); |
| 723 | } |
| 724 | |
| 725 | static int |
| 726 | recvit(int s, struct msghdr *mp, caddr_t namelenp) |
| 727 | { |
| 728 | struct thread *td = curthread; |
| 729 | struct proc *p = td->td_proc; |
| 730 | struct file *fp; |
| 731 | struct uio auio; |
| 732 | register struct iovec *iov; |
| 733 | register int i; |
| 734 | int len, error; |
| 735 | struct mbuf *m, *control = 0; |
| 736 | caddr_t ctlbuf; |
| 737 | struct socket *so; |
| 738 | struct sockaddr *fromsa = 0; |
| 739 | #ifdef KTRACE |
| 740 | struct iovec *ktriov = NULL; |
| 741 | struct uio ktruio; |
| 742 | #endif |
| 743 | |
| 744 | error = holdsock(p->p_fd, s, &fp); |
| 745 | if (error) |
| 746 | return (error); |
| 747 | auio.uio_iov = mp->msg_iov; |
| 748 | auio.uio_iovcnt = mp->msg_iovlen; |
| 749 | auio.uio_segflg = UIO_USERSPACE; |
| 750 | auio.uio_rw = UIO_READ; |
| 751 | auio.uio_td = td; |
| 752 | auio.uio_offset = 0; /* XXX */ |
| 753 | auio.uio_resid = 0; |
| 754 | iov = mp->msg_iov; |
| 755 | for (i = 0; i < mp->msg_iovlen; i++, iov++) { |
| 756 | if ((auio.uio_resid += iov->iov_len) < 0) { |
| 757 | fdrop(fp, td); |
| 758 | return (EINVAL); |
| 759 | } |
| 760 | } |
| 761 | #ifdef KTRACE |
| 762 | if (KTRPOINT(td, KTR_GENIO)) { |
| 763 | int iovlen = auio.uio_iovcnt * sizeof (struct iovec); |
| 764 | |
| 765 | MALLOC(ktriov, struct iovec *, iovlen, M_TEMP, M_WAITOK); |
| 766 | bcopy((caddr_t)auio.uio_iov, (caddr_t)ktriov, iovlen); |
| 767 | ktruio = auio; |
| 768 | } |
| 769 | #endif |
| 770 | len = auio.uio_resid; |
| 771 | so = (struct socket *)fp->f_data; |
| 772 | error = so->so_proto->pr_usrreqs->pru_soreceive(so, &fromsa, &auio, |
| 773 | (struct mbuf **)0, mp->msg_control ? &control : (struct mbuf **)0, |
| 774 | &mp->msg_flags); |
| 775 | if (error) { |
| 776 | if (auio.uio_resid != len && (error == ERESTART || |
| 777 | error == EINTR || error == EWOULDBLOCK)) |
| 778 | error = 0; |
| 779 | } |
| 780 | #ifdef KTRACE |
| 781 | if (ktriov != NULL) { |
| 782 | if (error == 0) { |
| 783 | ktruio.uio_iov = ktriov; |
| 784 | ktruio.uio_resid = len - auio.uio_resid; |
| 785 | ktrgenio(p->p_tracep, s, UIO_READ, &ktruio, error); |
| 786 | } |
| 787 | FREE(ktriov, M_TEMP); |
| 788 | } |
| 789 | #endif |
| 790 | if (error) |
| 791 | goto out; |
| 792 | p->p_retval[0] = len - auio.uio_resid; |
| 793 | if (mp->msg_name) { |
| 794 | len = mp->msg_namelen; |
| 795 | if (len <= 0 || fromsa == 0) |
| 796 | len = 0; |
| 797 | else { |
| 798 | #ifndef MIN |
| 799 | #define MIN(a,b) ((a)>(b)?(b):(a)) |
| 800 | #endif |
| 801 | /* save sa_len before it is destroyed by MSG_COMPAT */ |
| 802 | len = MIN(len, fromsa->sa_len); |
| 803 | #ifdef COMPAT_OLDSOCK |
| 804 | if (mp->msg_flags & MSG_COMPAT) |
| 805 | ((struct osockaddr *)fromsa)->sa_family = |
| 806 | fromsa->sa_family; |
| 807 | #endif |
| 808 | error = copyout(fromsa, |
| 809 | (caddr_t)mp->msg_name, (unsigned)len); |
| 810 | if (error) |
| 811 | goto out; |
| 812 | } |
| 813 | mp->msg_namelen = len; |
| 814 | if (namelenp && |
| 815 | (error = copyout((caddr_t)&len, namelenp, sizeof (int)))) { |
| 816 | #ifdef COMPAT_OLDSOCK |
| 817 | if (mp->msg_flags & MSG_COMPAT) |
| 818 | error = 0; /* old recvfrom didn't check */ |
| 819 | else |
| 820 | #endif |
| 821 | goto out; |
| 822 | } |
| 823 | } |
| 824 | if (mp->msg_control) { |
| 825 | #ifdef COMPAT_OLDSOCK |
| 826 | /* |
| 827 | * We assume that old recvmsg calls won't receive access |
| 828 | * rights and other control info, esp. as control info |
| 829 | * is always optional and those options didn't exist in 4.3. |
| 830 | * If we receive rights, trim the cmsghdr; anything else |
| 831 | * is tossed. |
| 832 | */ |
| 833 | if (control && mp->msg_flags & MSG_COMPAT) { |
| 834 | if (mtod(control, struct cmsghdr *)->cmsg_level != |
| 835 | SOL_SOCKET || |
| 836 | mtod(control, struct cmsghdr *)->cmsg_type != |
| 837 | SCM_RIGHTS) { |
| 838 | mp->msg_controllen = 0; |
| 839 | goto out; |
| 840 | } |
| 841 | control->m_len -= sizeof (struct cmsghdr); |
| 842 | control->m_data += sizeof (struct cmsghdr); |
| 843 | } |
| 844 | #endif |
| 845 | len = mp->msg_controllen; |
| 846 | m = control; |
| 847 | mp->msg_controllen = 0; |
| 848 | ctlbuf = (caddr_t) mp->msg_control; |
| 849 | |
| 850 | while (m && len > 0) { |
| 851 | unsigned int tocopy; |
| 852 | |
| 853 | if (len >= m->m_len) |
| 854 | tocopy = m->m_len; |
| 855 | else { |
| 856 | mp->msg_flags |= MSG_CTRUNC; |
| 857 | tocopy = len; |
| 858 | } |
| 859 | |
| 860 | if ((error = copyout((caddr_t)mtod(m, caddr_t), |
| 861 | ctlbuf, tocopy)) != 0) |
| 862 | goto out; |
| 863 | |
| 864 | ctlbuf += tocopy; |
| 865 | len -= tocopy; |
| 866 | m = m->m_next; |
| 867 | } |
| 868 | mp->msg_controllen = ctlbuf - (caddr_t)mp->msg_control; |
| 869 | } |
| 870 | out: |
| 871 | fdrop(fp, td); |
| 872 | if (fromsa) |
| 873 | FREE(fromsa, M_SONAME); |
| 874 | if (control) |
| 875 | m_freem(control); |
| 876 | return (error); |
| 877 | } |
| 878 | |
| 879 | /* |
| 880 | * recvfrom_args(int s, caddr_t buf, size_t len, int flags, |
| 881 | * caddr_t from, int *fromlenaddr) |
| 882 | */ |
| 883 | int |
| 884 | recvfrom(struct recvfrom_args *uap) |
| 885 | { |
| 886 | struct msghdr msg; |
| 887 | struct iovec aiov; |
| 888 | int error; |
| 889 | |
| 890 | if (uap->fromlenaddr) { |
| 891 | error = copyin((caddr_t)uap->fromlenaddr, |
| 892 | (caddr_t)&msg.msg_namelen, sizeof (msg.msg_namelen)); |
| 893 | if (error) |
| 894 | return (error); |
| 895 | } else |
| 896 | msg.msg_namelen = 0; |
| 897 | msg.msg_name = uap->from; |
| 898 | msg.msg_iov = &aiov; |
| 899 | msg.msg_iovlen = 1; |
| 900 | aiov.iov_base = uap->buf; |
| 901 | aiov.iov_len = uap->len; |
| 902 | msg.msg_control = 0; |
| 903 | msg.msg_flags = uap->flags; |
| 904 | return (recvit(uap->s, &msg, (caddr_t)uap->fromlenaddr)); |
| 905 | } |
| 906 | |
| 907 | #ifdef COMPAT_OLDSOCK |
| 908 | int |
| 909 | orecvfrom(struct recvfrom_args *uap) |
| 910 | { |
| 911 | uap->flags |= MSG_COMPAT; |
| 912 | return (recvfrom(uap)); |
| 913 | } |
| 914 | #endif |
| 915 | |
| 916 | #ifdef COMPAT_OLDSOCK |
| 917 | /* |
| 918 | * struct orecv_args(int s, caddr_t buf, int len, int flags) |
| 919 | */ |
| 920 | int |
| 921 | orecv(struct orecv_args *uap) |
| 922 | { |
| 923 | struct msghdr msg; |
| 924 | struct iovec aiov; |
| 925 | |
| 926 | msg.msg_name = 0; |
| 927 | msg.msg_namelen = 0; |
| 928 | msg.msg_iov = &aiov; |
| 929 | msg.msg_iovlen = 1; |
| 930 | aiov.iov_base = uap->buf; |
| 931 | aiov.iov_len = uap->len; |
| 932 | msg.msg_control = 0; |
| 933 | msg.msg_flags = uap->flags; |
| 934 | return (recvit(uap->s, &msg, (caddr_t)0)); |
| 935 | } |
| 936 | |
| 937 | /* |
| 938 | * Old recvmsg. This code takes advantage of the fact that the old msghdr |
| 939 | * overlays the new one, missing only the flags, and with the (old) access |
| 940 | * rights where the control fields are now. |
| 941 | * |
| 942 | * orecvmsg_args(int s, struct omsghdr *msg, int flags) |
| 943 | */ |
| 944 | int |
| 945 | orecvmsg(struct orecvmsg_args *uap) |
| 946 | { |
| 947 | struct msghdr msg; |
| 948 | struct iovec aiov[UIO_SMALLIOV], *iov; |
| 949 | int error; |
| 950 | |
| 951 | error = copyin((caddr_t)uap->msg, (caddr_t)&msg, |
| 952 | sizeof (struct omsghdr)); |
| 953 | if (error) |
| 954 | return (error); |
| 955 | if ((u_int)msg.msg_iovlen >= UIO_SMALLIOV) { |
| 956 | if ((u_int)msg.msg_iovlen >= UIO_MAXIOV) |
| 957 | return (EMSGSIZE); |
| 958 | MALLOC(iov, struct iovec *, |
| 959 | sizeof(struct iovec) * (u_int)msg.msg_iovlen, M_IOV, |
| 960 | M_WAITOK); |
| 961 | } else |
| 962 | iov = aiov; |
| 963 | msg.msg_flags = uap->flags | MSG_COMPAT; |
| 964 | error = copyin((caddr_t)msg.msg_iov, (caddr_t)iov, |
| 965 | (unsigned)(msg.msg_iovlen * sizeof (struct iovec))); |
| 966 | if (error) |
| 967 | goto done; |
| 968 | msg.msg_iov = iov; |
| 969 | error = recvit(uap->s, &msg, (caddr_t)&uap->msg->msg_namelen); |
| 970 | |
| 971 | if (msg.msg_controllen && error == 0) |
| 972 | error = copyout((caddr_t)&msg.msg_controllen, |
| 973 | (caddr_t)&uap->msg->msg_accrightslen, sizeof (int)); |
| 974 | done: |
| 975 | if (iov != aiov) |
| 976 | FREE(iov, M_IOV); |
| 977 | return (error); |
| 978 | } |
| 979 | #endif |
| 980 | |
| 981 | /* |
| 982 | * recvmsg_args(int s, struct msghdr *msg, int flags) |
| 983 | */ |
| 984 | int |
| 985 | recvmsg(struct recvmsg_args *uap) |
| 986 | { |
| 987 | struct msghdr msg; |
| 988 | struct iovec aiov[UIO_SMALLIOV], *uiov, *iov; |
| 989 | int error; |
| 990 | |
| 991 | error = copyin((caddr_t)uap->msg, (caddr_t)&msg, sizeof (msg)); |
| 992 | if (error) |
| 993 | return (error); |
| 994 | if ((u_int)msg.msg_iovlen >= UIO_SMALLIOV) { |
| 995 | if ((u_int)msg.msg_iovlen >= UIO_MAXIOV) |
| 996 | return (EMSGSIZE); |
| 997 | MALLOC(iov, struct iovec *, |
| 998 | sizeof(struct iovec) * (u_int)msg.msg_iovlen, M_IOV, |
| 999 | M_WAITOK); |
| 1000 | } else |
| 1001 | iov = aiov; |
| 1002 | #ifdef COMPAT_OLDSOCK |
| 1003 | msg.msg_flags = uap->flags &~ MSG_COMPAT; |
| 1004 | #else |
| 1005 | msg.msg_flags = uap->flags; |
| 1006 | #endif |
| 1007 | uiov = msg.msg_iov; |
| 1008 | msg.msg_iov = iov; |
| 1009 | error = copyin((caddr_t)uiov, (caddr_t)iov, |
| 1010 | (unsigned)(msg.msg_iovlen * sizeof (struct iovec))); |
| 1011 | if (error) |
| 1012 | goto done; |
| 1013 | error = recvit(uap->s, &msg, (caddr_t)0); |
| 1014 | if (!error) { |
| 1015 | msg.msg_iov = uiov; |
| 1016 | error = copyout((caddr_t)&msg, (caddr_t)uap->msg, sizeof(msg)); |
| 1017 | } |
| 1018 | done: |
| 1019 | if (iov != aiov) |
| 1020 | FREE(iov, M_IOV); |
| 1021 | return (error); |
| 1022 | } |
| 1023 | |
| 1024 | /* |
| 1025 | * shutdown_args(int s, int how) |
| 1026 | */ |
| 1027 | /* ARGSUSED */ |
| 1028 | int |
| 1029 | shutdown(struct shutdown_args *uap) |
| 1030 | { |
| 1031 | struct thread *td = curthread; |
| 1032 | struct proc *p = td->td_proc; |
| 1033 | struct file *fp; |
| 1034 | int error; |
| 1035 | |
| 1036 | KKASSERT(p); |
| 1037 | error = holdsock(p->p_fd, uap->s, &fp); |
| 1038 | if (error) |
| 1039 | return (error); |
| 1040 | error = soshutdown((struct socket *)fp->f_data, uap->how); |
| 1041 | fdrop(fp, td); |
| 1042 | return(error); |
| 1043 | } |
| 1044 | |
| 1045 | /* |
| 1046 | * setsockopt_args(int s, int level, int name, caddr_t val, int valsize) |
| 1047 | */ |
| 1048 | /* ARGSUSED */ |
| 1049 | int |
| 1050 | setsockopt(struct setsockopt_args *uap) |
| 1051 | { |
| 1052 | struct thread *td = curthread; |
| 1053 | struct proc *p = td->td_proc; |
| 1054 | struct file *fp; |
| 1055 | struct sockopt sopt; |
| 1056 | int error; |
| 1057 | |
| 1058 | if (uap->val == 0 && uap->valsize != 0) |
| 1059 | return (EFAULT); |
| 1060 | if (uap->valsize < 0) |
| 1061 | return (EINVAL); |
| 1062 | |
| 1063 | error = holdsock(p->p_fd, uap->s, &fp); |
| 1064 | if (error) |
| 1065 | return (error); |
| 1066 | |
| 1067 | sopt.sopt_dir = SOPT_SET; |
| 1068 | sopt.sopt_level = uap->level; |
| 1069 | sopt.sopt_name = uap->name; |
| 1070 | sopt.sopt_val = uap->val; |
| 1071 | sopt.sopt_valsize = uap->valsize; |
| 1072 | sopt.sopt_td = td; |
| 1073 | error = sosetopt((struct socket *)fp->f_data, &sopt); |
| 1074 | fdrop(fp, td); |
| 1075 | return(error); |
| 1076 | } |
| 1077 | |
| 1078 | /* |
| 1079 | * getsockopt_Args(int s, int level, int name, caddr_t val, int *avalsize) |
| 1080 | */ |
| 1081 | /* ARGSUSED */ |
| 1082 | int |
| 1083 | getsockopt(struct getsockopt_args *uap) |
| 1084 | { |
| 1085 | struct thread *td = curthread; |
| 1086 | struct proc *p = td->td_proc; |
| 1087 | int valsize, error; |
| 1088 | struct file *fp; |
| 1089 | struct sockopt sopt; |
| 1090 | |
| 1091 | error = holdsock(p->p_fd, uap->s, &fp); |
| 1092 | if (error) |
| 1093 | return (error); |
| 1094 | if (uap->val) { |
| 1095 | error = copyin((caddr_t)uap->avalsize, (caddr_t)&valsize, |
| 1096 | sizeof (valsize)); |
| 1097 | if (error) { |
| 1098 | fdrop(fp, td); |
| 1099 | return (error); |
| 1100 | } |
| 1101 | if (valsize < 0) { |
| 1102 | fdrop(fp, td); |
| 1103 | return (EINVAL); |
| 1104 | } |
| 1105 | } else { |
| 1106 | valsize = 0; |
| 1107 | } |
| 1108 | |
| 1109 | sopt.sopt_dir = SOPT_GET; |
| 1110 | sopt.sopt_level = uap->level; |
| 1111 | sopt.sopt_name = uap->name; |
| 1112 | sopt.sopt_val = uap->val; |
| 1113 | sopt.sopt_valsize = (size_t)valsize; /* checked non-negative above */ |
| 1114 | sopt.sopt_td = td; |
| 1115 | |
| 1116 | error = sogetopt((struct socket *)fp->f_data, &sopt); |
| 1117 | if (error == 0) { |
| 1118 | valsize = sopt.sopt_valsize; |
| 1119 | error = copyout((caddr_t)&valsize, |
| 1120 | (caddr_t)uap->avalsize, sizeof (valsize)); |
| 1121 | } |
| 1122 | fdrop(fp, td); |
| 1123 | return (error); |
| 1124 | } |
| 1125 | |
| 1126 | /* |
| 1127 | * getsockname_args(int fdes, caddr_t asa, int *alen) |
| 1128 | * |
| 1129 | * Get socket name. |
| 1130 | */ |
| 1131 | /* ARGSUSED */ |
| 1132 | static int |
| 1133 | getsockname1(struct getsockname_args *uap, int compat) |
| 1134 | { |
| 1135 | struct thread *td = curthread; |
| 1136 | struct proc *p = td->td_proc; |
| 1137 | struct file *fp; |
| 1138 | struct socket *so; |
| 1139 | struct sockaddr *sa; |
| 1140 | int len, error; |
| 1141 | |
| 1142 | error = holdsock(p->p_fd, uap->fdes, &fp); |
| 1143 | if (error) |
| 1144 | return (error); |
| 1145 | error = copyin((caddr_t)uap->alen, (caddr_t)&len, sizeof (len)); |
| 1146 | if (error) { |
| 1147 | fdrop(fp, td); |
| 1148 | return (error); |
| 1149 | } |
| 1150 | if (len < 0) { |
| 1151 | fdrop(fp, td); |
| 1152 | return (EINVAL); |
| 1153 | } |
| 1154 | so = (struct socket *)fp->f_data; |
| 1155 | sa = 0; |
| 1156 | error = (*so->so_proto->pr_usrreqs->pru_sockaddr)(so, &sa); |
| 1157 | if (error) |
| 1158 | goto bad; |
| 1159 | if (sa == 0) { |
| 1160 | len = 0; |
| 1161 | goto gotnothing; |
| 1162 | } |
| 1163 | |
| 1164 | len = MIN(len, sa->sa_len); |
| 1165 | #ifdef COMPAT_OLDSOCK |
| 1166 | if (compat) |
| 1167 | ((struct osockaddr *)sa)->sa_family = sa->sa_family; |
| 1168 | #endif |
| 1169 | error = copyout(sa, (caddr_t)uap->asa, (u_int)len); |
| 1170 | if (error == 0) |
| 1171 | gotnothing: |
| 1172 | error = copyout((caddr_t)&len, (caddr_t)uap->alen, |
| 1173 | sizeof (len)); |
| 1174 | bad: |
| 1175 | if (sa) |
| 1176 | FREE(sa, M_SONAME); |
| 1177 | fdrop(fp, td); |
| 1178 | return (error); |
| 1179 | } |
| 1180 | |
| 1181 | int |
| 1182 | getsockname(struct getsockname_args *uap) |
| 1183 | { |
| 1184 | |
| 1185 | return (getsockname1(uap, 0)); |
| 1186 | } |
| 1187 | |
| 1188 | #ifdef COMPAT_OLDSOCK |
| 1189 | int |
| 1190 | ogetsockname(struct getsockname_args *uap) |
| 1191 | { |
| 1192 | |
| 1193 | return (getsockname1(uap, 1)); |
| 1194 | } |
| 1195 | #endif /* COMPAT_OLDSOCK */ |
| 1196 | |
| 1197 | /* |
| 1198 | * getpeername_args(int fdes, caddr_t asa, int *alen) |
| 1199 | * |
| 1200 | * Get name of peer for connected socket. |
| 1201 | */ |
| 1202 | /* ARGSUSED */ |
| 1203 | static int |
| 1204 | getpeername1(struct getpeername_args *uap, int compat) |
| 1205 | { |
| 1206 | struct thread *td = curthread; |
| 1207 | struct proc *p = td->td_proc; |
| 1208 | struct file *fp; |
| 1209 | struct socket *so; |
| 1210 | struct sockaddr *sa; |
| 1211 | int len, error; |
| 1212 | |
| 1213 | error = holdsock(p->p_fd, uap->fdes, &fp); |
| 1214 | if (error) |
| 1215 | return (error); |
| 1216 | so = (struct socket *)fp->f_data; |
| 1217 | if ((so->so_state & (SS_ISCONNECTED|SS_ISCONFIRMING)) == 0) { |
| 1218 | fdrop(fp, td); |
| 1219 | return (ENOTCONN); |
| 1220 | } |
| 1221 | error = copyin((caddr_t)uap->alen, (caddr_t)&len, sizeof (len)); |
| 1222 | if (error) { |
| 1223 | fdrop(fp, td); |
| 1224 | return (error); |
| 1225 | } |
| 1226 | if (len < 0) { |
| 1227 | fdrop(fp, td); |
| 1228 | return (EINVAL); |
| 1229 | } |
| 1230 | sa = 0; |
| 1231 | error = (*so->so_proto->pr_usrreqs->pru_peeraddr)(so, &sa); |
| 1232 | if (error) |
| 1233 | goto bad; |
| 1234 | if (sa == 0) { |
| 1235 | len = 0; |
| 1236 | goto gotnothing; |
| 1237 | } |
| 1238 | len = MIN(len, sa->sa_len); |
| 1239 | #ifdef COMPAT_OLDSOCK |
| 1240 | if (compat) |
| 1241 | ((struct osockaddr *)sa)->sa_family = |
| 1242 | sa->sa_family; |
| 1243 | #endif |
| 1244 | error = copyout(sa, (caddr_t)uap->asa, (u_int)len); |
| 1245 | if (error) |
| 1246 | goto bad; |
| 1247 | gotnothing: |
| 1248 | error = copyout((caddr_t)&len, (caddr_t)uap->alen, sizeof (len)); |
| 1249 | bad: |
| 1250 | if (sa) |
| 1251 | FREE(sa, M_SONAME); |
| 1252 | fdrop(fp, td); |
| 1253 | return (error); |
| 1254 | } |
| 1255 | |
| 1256 | int |
| 1257 | getpeername(struct getpeername_args *uap) |
| 1258 | { |
| 1259 | return (getpeername1(uap, 0)); |
| 1260 | } |
| 1261 | |
| 1262 | #ifdef COMPAT_OLDSOCK |
| 1263 | int |
| 1264 | ogetpeername(struct ogetpeername_args *uap) |
| 1265 | { |
| 1266 | /* XXX uap should have type `getpeername_args *' to begin with. */ |
| 1267 | return (getpeername1((struct getpeername_args *)uap, 1)); |
| 1268 | } |
| 1269 | #endif /* COMPAT_OLDSOCK */ |
| 1270 | |
| 1271 | int |
| 1272 | sockargs(mp, buf, buflen, type) |
| 1273 | struct mbuf **mp; |
| 1274 | caddr_t buf; |
| 1275 | int buflen, type; |
| 1276 | { |
| 1277 | register struct sockaddr *sa; |
| 1278 | register struct mbuf *m; |
| 1279 | int error; |
| 1280 | |
| 1281 | if ((u_int)buflen > MLEN) { |
| 1282 | #ifdef COMPAT_OLDSOCK |
| 1283 | if (type == MT_SONAME && (u_int)buflen <= 112) |
| 1284 | buflen = MLEN; /* unix domain compat. hack */ |
| 1285 | else |
| 1286 | #endif |
| 1287 | return (EINVAL); |
| 1288 | } |
| 1289 | m = m_get(M_WAIT, type); |
| 1290 | if (m == NULL) |
| 1291 | return (ENOBUFS); |
| 1292 | m->m_len = buflen; |
| 1293 | error = copyin(buf, mtod(m, caddr_t), (u_int)buflen); |
| 1294 | if (error) |
| 1295 | (void) m_free(m); |
| 1296 | else { |
| 1297 | *mp = m; |
| 1298 | if (type == MT_SONAME) { |
| 1299 | sa = mtod(m, struct sockaddr *); |
| 1300 | |
| 1301 | #if defined(COMPAT_OLDSOCK) && BYTE_ORDER != BIG_ENDIAN |
| 1302 | if (sa->sa_family == 0 && sa->sa_len < AF_MAX) |
| 1303 | sa->sa_family = sa->sa_len; |
| 1304 | #endif |
| 1305 | sa->sa_len = buflen; |
| 1306 | } |
| 1307 | } |
| 1308 | return (error); |
| 1309 | } |
| 1310 | |
| 1311 | int |
| 1312 | getsockaddr(namp, uaddr, len) |
| 1313 | struct sockaddr **namp; |
| 1314 | caddr_t uaddr; |
| 1315 | size_t len; |
| 1316 | { |
| 1317 | struct sockaddr *sa; |
| 1318 | int error; |
| 1319 | |
| 1320 | if (len > SOCK_MAXADDRLEN) |
| 1321 | return ENAMETOOLONG; |
| 1322 | MALLOC(sa, struct sockaddr *, len, M_SONAME, M_WAITOK); |
| 1323 | error = copyin(uaddr, sa, len); |
| 1324 | if (error) { |
| 1325 | FREE(sa, M_SONAME); |
| 1326 | } else { |
| 1327 | #if defined(COMPAT_OLDSOCK) && BYTE_ORDER != BIG_ENDIAN |
| 1328 | if (sa->sa_family == 0 && sa->sa_len < AF_MAX) |
| 1329 | sa->sa_family = sa->sa_len; |
| 1330 | #endif |
| 1331 | sa->sa_len = len; |
| 1332 | *namp = sa; |
| 1333 | } |
| 1334 | return error; |
| 1335 | } |
| 1336 | |
| 1337 | /* |
| 1338 | * holdsock() - load the struct file pointer associated |
| 1339 | * with a socket into *fpp. If an error occurs, non-zero |
| 1340 | * will be returned and *fpp will be set to NULL. |
| 1341 | */ |
| 1342 | int |
| 1343 | holdsock(fdp, fdes, fpp) |
| 1344 | struct filedesc *fdp; |
| 1345 | int fdes; |
| 1346 | struct file **fpp; |
| 1347 | { |
| 1348 | register struct file *fp = NULL; |
| 1349 | int error = 0; |
| 1350 | |
| 1351 | if ((unsigned)fdes >= fdp->fd_nfiles || |
| 1352 | (fp = fdp->fd_ofiles[fdes]) == NULL) { |
| 1353 | error = EBADF; |
| 1354 | } else if (fp->f_type != DTYPE_SOCKET) { |
| 1355 | error = ENOTSOCK; |
| 1356 | fp = NULL; |
| 1357 | } else { |
| 1358 | fhold(fp); |
| 1359 | } |
| 1360 | *fpp = fp; |
| 1361 | return(error); |
| 1362 | } |
| 1363 | |
| 1364 | /* |
| 1365 | * Allocate a pool of sf_bufs (sendfile(2) or "super-fast" if you prefer. :-)) |
| 1366 | */ |
| 1367 | static void |
| 1368 | sf_buf_init(void *arg) |
| 1369 | { |
| 1370 | int i; |
| 1371 | |
| 1372 | SLIST_INIT(&sf_freelist); |
| 1373 | sf_base = kmem_alloc_pageable(kernel_map, nsfbufs * PAGE_SIZE); |
| 1374 | sf_bufs = malloc(nsfbufs * sizeof(struct sf_buf), M_TEMP, M_NOWAIT); |
| 1375 | bzero(sf_bufs, nsfbufs * sizeof(struct sf_buf)); |
| 1376 | for (i = 0; i < nsfbufs; i++) { |
| 1377 | sf_bufs[i].kva = sf_base + i * PAGE_SIZE; |
| 1378 | SLIST_INSERT_HEAD(&sf_freelist, &sf_bufs[i], free_list); |
| 1379 | } |
| 1380 | } |
| 1381 | |
| 1382 | /* |
| 1383 | * Get an sf_buf from the freelist. Will block if none are available. |
| 1384 | */ |
| 1385 | struct sf_buf * |
| 1386 | sf_buf_alloc() |
| 1387 | { |
| 1388 | struct sf_buf *sf; |
| 1389 | int s; |
| 1390 | int error; |
| 1391 | |
| 1392 | s = splimp(); |
| 1393 | while ((sf = SLIST_FIRST(&sf_freelist)) == NULL) { |
| 1394 | sf_buf_alloc_want = 1; |
| 1395 | error = tsleep(&sf_freelist, PVM|PCATCH, "sfbufa", 0); |
| 1396 | if (error) |
| 1397 | break; |
| 1398 | } |
| 1399 | if (sf != NULL) { |
| 1400 | SLIST_REMOVE_HEAD(&sf_freelist, free_list); |
| 1401 | sf->refcnt = 1; |
| 1402 | } |
| 1403 | splx(s); |
| 1404 | return (sf); |
| 1405 | } |
| 1406 | |
| 1407 | #define dtosf(x) (&sf_bufs[((uintptr_t)(x) - (uintptr_t)sf_base) >> PAGE_SHIFT]) |
| 1408 | void |
| 1409 | sf_buf_ref(caddr_t addr, u_int size) |
| 1410 | { |
| 1411 | struct sf_buf *sf; |
| 1412 | |
| 1413 | sf = dtosf(addr); |
| 1414 | if (sf->refcnt == 0) |
| 1415 | panic("sf_buf_ref: referencing a free sf_buf"); |
| 1416 | sf->refcnt++; |
| 1417 | } |
| 1418 | |
| 1419 | /* |
| 1420 | * Lose a reference to an sf_buf. When none left, detach mapped page |
| 1421 | * and release resources back to the system. |
| 1422 | * |
| 1423 | * Must be called at splimp. |
| 1424 | */ |
| 1425 | void |
| 1426 | sf_buf_free(caddr_t addr, u_int size) |
| 1427 | { |
| 1428 | struct sf_buf *sf; |
| 1429 | struct vm_page *m; |
| 1430 | int s; |
| 1431 | |
| 1432 | sf = dtosf(addr); |
| 1433 | if (sf->refcnt == 0) |
| 1434 | panic("sf_buf_free: freeing free sf_buf"); |
| 1435 | sf->refcnt--; |
| 1436 | if (sf->refcnt == 0) { |
| 1437 | pmap_qremove((vm_offset_t)addr, 1); |
| 1438 | m = sf->m; |
| 1439 | s = splvm(); |
| 1440 | vm_page_unwire(m, 0); |
| 1441 | /* |
| 1442 | * Check for the object going away on us. This can |
| 1443 | * happen since we don't hold a reference to it. |
| 1444 | * If so, we're responsible for freeing the page. |
| 1445 | */ |
| 1446 | if (m->wire_count == 0 && m->object == NULL) |
| 1447 | vm_page_free(m); |
| 1448 | splx(s); |
| 1449 | sf->m = NULL; |
| 1450 | SLIST_INSERT_HEAD(&sf_freelist, sf, free_list); |
| 1451 | if (sf_buf_alloc_want) { |
| 1452 | sf_buf_alloc_want = 0; |
| 1453 | wakeup(&sf_freelist); |
| 1454 | } |
| 1455 | } |
| 1456 | } |
| 1457 | |
| 1458 | /* |
| 1459 | * sendfile(2). |
| 1460 | * int sendfile(int fd, int s, off_t offset, size_t nbytes, |
| 1461 | * struct sf_hdtr *hdtr, off_t *sbytes, int flags) |
| 1462 | * |
| 1463 | * Send a file specified by 'fd' and starting at 'offset' to a socket |
| 1464 | * specified by 's'. Send only 'nbytes' of the file or until EOF if |
| 1465 | * nbytes == 0. Optionally add a header and/or trailer to the socket |
| 1466 | * output. If specified, write the total number of bytes sent into *sbytes. |
| 1467 | */ |
| 1468 | int |
| 1469 | sendfile(struct sendfile_args *uap) |
| 1470 | { |
| 1471 | return (do_sendfile(uap, 0)); |
| 1472 | } |
| 1473 | |
| 1474 | #ifdef COMPAT_43 |
| 1475 | int |
| 1476 | osendfile(struct osendfile_args *uap) |
| 1477 | { |
| 1478 | struct sendfile_args args; |
| 1479 | |
| 1480 | args.fd = uap->fd; |
| 1481 | args.s = uap->s; |
| 1482 | args.offset = uap->offset; |
| 1483 | args.nbytes = uap->nbytes; |
| 1484 | args.hdtr = uap->hdtr; |
| 1485 | args.sbytes = uap->sbytes; |
| 1486 | args.flags = uap->flags; |
| 1487 | |
| 1488 | return (do_sendfile(&args, 1)); |
| 1489 | } |
| 1490 | #endif |
| 1491 | |
| 1492 | int |
| 1493 | do_sendfile(struct sendfile_args *uap, int compat) |
| 1494 | { |
| 1495 | struct thread *td = curthread; |
| 1496 | struct proc *p = td->td_proc; |
| 1497 | struct file *fp; |
| 1498 | struct filedesc *fdp; |
| 1499 | struct vnode *vp; |
| 1500 | struct vm_object *obj; |
| 1501 | struct socket *so; |
| 1502 | struct mbuf *m; |
| 1503 | struct sf_buf *sf; |
| 1504 | struct vm_page *pg; |
| 1505 | struct writev_args nuap; |
| 1506 | struct sf_hdtr hdtr; |
| 1507 | off_t off, xfsize, hdtr_size, sbytes = 0; |
| 1508 | int error = 0, s; |
| 1509 | |
| 1510 | KKASSERT(p); |
| 1511 | fdp = p->p_fd; |
| 1512 | |
| 1513 | vp = NULL; |
| 1514 | hdtr_size = 0; |
| 1515 | /* |
| 1516 | * Do argument checking. Must be a regular file in, stream |
| 1517 | * type and connected socket out, positive offset. |
| 1518 | */ |
| 1519 | fp = holdfp(fdp, uap->fd, FREAD); |
| 1520 | if (fp == NULL) { |
| 1521 | error = EBADF; |
| 1522 | goto done; |
| 1523 | } |
| 1524 | if (fp->f_type != DTYPE_VNODE) { |
| 1525 | error = EINVAL; |
| 1526 | goto done; |
| 1527 | } |
| 1528 | vp = (struct vnode *)fp->f_data; |
| 1529 | vref(vp); |
| 1530 | if (vp->v_type != VREG || VOP_GETVOBJECT(vp, &obj) != 0) { |
| 1531 | error = EINVAL; |
| 1532 | goto done; |
| 1533 | } |
| 1534 | fdrop(fp, td); |
| 1535 | error = holdsock(p->p_fd, uap->s, &fp); |
| 1536 | if (error) |
| 1537 | goto done; |
| 1538 | so = (struct socket *)fp->f_data; |
| 1539 | if (so->so_type != SOCK_STREAM) { |
| 1540 | error = EINVAL; |
| 1541 | goto done; |
| 1542 | } |
| 1543 | if ((so->so_state & SS_ISCONNECTED) == 0) { |
| 1544 | error = ENOTCONN; |
| 1545 | goto done; |
| 1546 | } |
| 1547 | if (uap->offset < 0) { |
| 1548 | error = EINVAL; |
| 1549 | goto done; |
| 1550 | } |
| 1551 | |
| 1552 | /* |
| 1553 | * If specified, get the pointer to the sf_hdtr struct for |
| 1554 | * any headers/trailers. |
| 1555 | */ |
| 1556 | if (uap->hdtr != NULL) { |
| 1557 | error = copyin(uap->hdtr, &hdtr, sizeof(hdtr)); |
| 1558 | if (error) |
| 1559 | goto done; |
| 1560 | /* |
| 1561 | * Send any headers. Wimp out and use writev(2). |
| 1562 | */ |
| 1563 | if (hdtr.headers != NULL) { |
| 1564 | nuap.fd = uap->s; |
| 1565 | nuap.iovp = hdtr.headers; |
| 1566 | nuap.iovcnt = hdtr.hdr_cnt; |
| 1567 | error = writev(&nuap); |
| 1568 | if (error) |
| 1569 | goto done; |
| 1570 | if (compat) |
| 1571 | sbytes += p->p_retval[0]; |
| 1572 | else |
| 1573 | hdtr_size += p->p_retval[0]; |
| 1574 | } |
| 1575 | } |
| 1576 | |
| 1577 | /* |
| 1578 | * Protect against multiple writers to the socket. |
| 1579 | */ |
| 1580 | (void) sblock(&so->so_snd, M_WAITOK); |
| 1581 | |
| 1582 | /* |
| 1583 | * Loop through the pages in the file, starting with the requested |
| 1584 | * offset. Get a file page (do I/O if necessary), map the file page |
| 1585 | * into an sf_buf, attach an mbuf header to the sf_buf, and queue |
| 1586 | * it on the socket. |
| 1587 | */ |
| 1588 | for (off = uap->offset; ; off += xfsize, sbytes += xfsize) { |
| 1589 | vm_pindex_t pindex; |
| 1590 | vm_offset_t pgoff; |
| 1591 | |
| 1592 | pindex = OFF_TO_IDX(off); |
| 1593 | retry_lookup: |
| 1594 | /* |
| 1595 | * Calculate the amount to transfer. Not to exceed a page, |
| 1596 | * the EOF, or the passed in nbytes. |
| 1597 | */ |
| 1598 | xfsize = obj->un_pager.vnp.vnp_size - off; |
| 1599 | if (xfsize > PAGE_SIZE) |
| 1600 | xfsize = PAGE_SIZE; |
| 1601 | pgoff = (vm_offset_t)(off & PAGE_MASK); |
| 1602 | if (PAGE_SIZE - pgoff < xfsize) |
| 1603 | xfsize = PAGE_SIZE - pgoff; |
| 1604 | if (uap->nbytes && xfsize > (uap->nbytes - sbytes)) |
| 1605 | xfsize = uap->nbytes - sbytes; |
| 1606 | if (xfsize <= 0) |
| 1607 | break; |
| 1608 | /* |
| 1609 | * Optimize the non-blocking case by looking at the socket space |
| 1610 | * before going to the extra work of constituting the sf_buf. |
| 1611 | */ |
| 1612 | if ((so->so_state & SS_NBIO) && sbspace(&so->so_snd) <= 0) { |
| 1613 | if (so->so_state & SS_CANTSENDMORE) |
| 1614 | error = EPIPE; |
| 1615 | else |
| 1616 | error = EAGAIN; |
| 1617 | sbunlock(&so->so_snd); |
| 1618 | goto done; |
| 1619 | } |
| 1620 | /* |
| 1621 | * Attempt to look up the page. |
| 1622 | * |
| 1623 | * Allocate if not found |
| 1624 | * |
| 1625 | * Wait and loop if busy. |
| 1626 | */ |
| 1627 | pg = vm_page_lookup(obj, pindex); |
| 1628 | |
| 1629 | if (pg == NULL) { |
| 1630 | pg = vm_page_alloc(obj, pindex, VM_ALLOC_NORMAL); |
| 1631 | if (pg == NULL) { |
| 1632 | VM_WAIT; |
| 1633 | goto retry_lookup; |
| 1634 | } |
| 1635 | vm_page_wakeup(pg); |
| 1636 | } else if (vm_page_sleep_busy(pg, TRUE, "sfpbsy")) { |
| 1637 | goto retry_lookup; |
| 1638 | } |
| 1639 | |
| 1640 | /* |
| 1641 | * Wire the page so it does not get ripped out from under |
| 1642 | * us. |
| 1643 | */ |
| 1644 | |
| 1645 | vm_page_wire(pg); |
| 1646 | |
| 1647 | /* |
| 1648 | * If page is not valid for what we need, initiate I/O |
| 1649 | */ |
| 1650 | |
| 1651 | if (!pg->valid || !vm_page_is_valid(pg, pgoff, xfsize)) { |
| 1652 | struct uio auio; |
| 1653 | struct iovec aiov; |
| 1654 | int bsize; |
| 1655 | |
| 1656 | /* |
| 1657 | * Ensure that our page is still around when the I/O |
| 1658 | * completes. |
| 1659 | */ |
| 1660 | vm_page_io_start(pg); |
| 1661 | |
| 1662 | /* |
| 1663 | * Get the page from backing store. |
| 1664 | */ |
| 1665 | bsize = vp->v_mount->mnt_stat.f_iosize; |
| 1666 | auio.uio_iov = &aiov; |
| 1667 | auio.uio_iovcnt = 1; |
| 1668 | aiov.iov_base = 0; |
| 1669 | aiov.iov_len = MAXBSIZE; |
| 1670 | auio.uio_resid = MAXBSIZE; |
| 1671 | auio.uio_offset = trunc_page(off); |
| 1672 | auio.uio_segflg = UIO_NOCOPY; |
| 1673 | auio.uio_rw = UIO_READ; |
| 1674 | auio.uio_td = td; |
| 1675 | vn_lock(vp, LK_SHARED | LK_NOPAUSE | LK_RETRY, td); |
| 1676 | error = VOP_READ(vp, &auio, |
| 1677 | IO_VMIO | ((MAXBSIZE / bsize) << 16), |
| 1678 | p->p_ucred); |
| 1679 | VOP_UNLOCK(vp, 0, td); |
| 1680 | vm_page_flag_clear(pg, PG_ZERO); |
| 1681 | vm_page_io_finish(pg); |
| 1682 | if (error) { |
| 1683 | vm_page_unwire(pg, 0); |
| 1684 | /* |
| 1685 | * See if anyone else might know about this page. |
| 1686 | * If not and it is not valid, then free it. |
| 1687 | */ |
| 1688 | if (pg->wire_count == 0 && pg->valid == 0 && |
| 1689 | pg->busy == 0 && !(pg->flags & PG_BUSY) && |
| 1690 | pg->hold_count == 0) { |
| 1691 | vm_page_busy(pg); |
| 1692 | vm_page_free(pg); |
| 1693 | } |
| 1694 | sbunlock(&so->so_snd); |
| 1695 | goto done; |
| 1696 | } |
| 1697 | } |
| 1698 | |
| 1699 | |
| 1700 | /* |
| 1701 | * Get a sendfile buf. We usually wait as long as necessary, |
| 1702 | * but this wait can be interrupted. |
| 1703 | */ |
| 1704 | if ((sf = sf_buf_alloc()) == NULL) { |
| 1705 | s = splvm(); |
| 1706 | vm_page_unwire(pg, 0); |
| 1707 | if (pg->wire_count == 0 && pg->object == NULL) |
| 1708 | vm_page_free(pg); |
| 1709 | splx(s); |
| 1710 | sbunlock(&so->so_snd); |
| 1711 | error = EINTR; |
| 1712 | goto done; |
| 1713 | } |
| 1714 | |
| 1715 | |
| 1716 | /* |
| 1717 | * Allocate a kernel virtual page and insert the physical page |
| 1718 | * into it. |
| 1719 | */ |
| 1720 | |
| 1721 | sf->m = pg; |
| 1722 | pmap_qenter(sf->kva, &pg, 1); |
| 1723 | /* |
| 1724 | * Get an mbuf header and set it up as having external storage. |
| 1725 | */ |
| 1726 | MGETHDR(m, M_WAIT, MT_DATA); |
| 1727 | if (m == NULL) { |
| 1728 | error = ENOBUFS; |
| 1729 | sf_buf_free((void *)sf->kva, PAGE_SIZE); |
| 1730 | sbunlock(&so->so_snd); |
| 1731 | goto done; |
| 1732 | } |
| 1733 | m->m_ext.ext_free = sf_buf_free; |
| 1734 | m->m_ext.ext_ref = sf_buf_ref; |
| 1735 | m->m_ext.ext_buf = (void *)sf->kva; |
| 1736 | m->m_ext.ext_size = PAGE_SIZE; |
| 1737 | m->m_data = (char *) sf->kva + pgoff; |
| 1738 | m->m_flags |= M_EXT; |
| 1739 | m->m_pkthdr.len = m->m_len = xfsize; |
| 1740 | /* |
| 1741 | * Add the buffer to the socket buffer chain. |
| 1742 | */ |
| 1743 | s = splnet(); |
| 1744 | retry_space: |
| 1745 | /* |
| 1746 | * Make sure that the socket is still able to take more data. |
| 1747 | * CANTSENDMORE being true usually means that the connection |
| 1748 | * was closed. so_error is true when an error was sensed after |
| 1749 | * a previous send. |
| 1750 | * The state is checked after the page mapping and buffer |
| 1751 | * allocation above since those operations may block and make |
| 1752 | * any socket checks stale. From this point forward, nothing |
| 1753 | * blocks before the pru_send (or more accurately, any blocking |
| 1754 | * results in a loop back to here to re-check). |
| 1755 | */ |
| 1756 | if ((so->so_state & SS_CANTSENDMORE) || so->so_error) { |
| 1757 | if (so->so_state & SS_CANTSENDMORE) { |
| 1758 | error = EPIPE; |
| 1759 | } else { |
| 1760 | error = so->so_error; |
| 1761 | so->so_error = 0; |
| 1762 | } |
| 1763 | m_freem(m); |
| 1764 | sbunlock(&so->so_snd); |
| 1765 | splx(s); |
| 1766 | goto done; |
| 1767 | } |
| 1768 | /* |
| 1769 | * Wait for socket space to become available. We do this just |
| 1770 | * after checking the connection state above in order to avoid |
| 1771 | * a race condition with sbwait(). |
| 1772 | */ |
| 1773 | if (sbspace(&so->so_snd) < so->so_snd.sb_lowat) { |
| 1774 | if (so->so_state & SS_NBIO) { |
| 1775 | m_freem(m); |
| 1776 | sbunlock(&so->so_snd); |
| 1777 | splx(s); |
| 1778 | error = EAGAIN; |
| 1779 | goto done; |
| 1780 | } |
| 1781 | error = sbwait(&so->so_snd); |
| 1782 | /* |
| 1783 | * An error from sbwait usually indicates that we've |
| 1784 | * been interrupted by a signal. If we've sent anything |
| 1785 | * then return bytes sent, otherwise return the error. |
| 1786 | */ |
| 1787 | if (error) { |
| 1788 | m_freem(m); |
| 1789 | sbunlock(&so->so_snd); |
| 1790 | splx(s); |
| 1791 | goto done; |
| 1792 | } |
| 1793 | goto retry_space; |
| 1794 | } |
| 1795 | error = |
| 1796 | (*so->so_proto->pr_usrreqs->pru_send)(so, 0, m, 0, 0, td); |
| 1797 | splx(s); |
| 1798 | if (error) { |
| 1799 | sbunlock(&so->so_snd); |
| 1800 | goto done; |
| 1801 | } |
| 1802 | } |
| 1803 | sbunlock(&so->so_snd); |
| 1804 | |
| 1805 | /* |
| 1806 | * Send trailers. Wimp out and use writev(2). |
| 1807 | */ |
| 1808 | if (uap->hdtr != NULL && hdtr.trailers != NULL) { |
| 1809 | nuap.fd = uap->s; |
| 1810 | nuap.iovp = hdtr.trailers; |
| 1811 | nuap.iovcnt = hdtr.trl_cnt; |
| 1812 | error = writev(&nuap); |
| 1813 | if (error) |
| 1814 | goto done; |
| 1815 | if (compat) |
| 1816 | sbytes += p->p_retval[0]; |
| 1817 | else |
| 1818 | hdtr_size += p->p_retval[0]; |
| 1819 | } |
| 1820 | |
| 1821 | done: |
| 1822 | if (uap->sbytes != NULL) { |
| 1823 | if (compat == 0) |
| 1824 | sbytes += hdtr_size; |
| 1825 | copyout(&sbytes, uap->sbytes, sizeof(off_t)); |
| 1826 | } |
| 1827 | if (vp) |
| 1828 | vrele(vp); |
| 1829 | if (fp) |
| 1830 | fdrop(fp, td); |
| 1831 | return (error); |
| 1832 | } |