| 1 | /************************************************************ |
| 2 | |
| 3 | Copyright 1989, 1998 The Open Group |
| 4 | |
| 5 | Permission to use, copy, modify, distribute, and sell this software and its |
| 6 | documentation for any purpose is hereby granted without fee, provided that |
| 7 | the above copyright notice appear in all copies and that both that |
| 8 | copyright notice and this permission notice appear in supporting |
| 9 | documentation. |
| 10 | |
| 11 | The above copyright notice and this permission notice shall be included in |
| 12 | all copies or substantial portions of the Software. |
| 13 | |
| 14 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 15 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 16 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| 17 | OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN |
| 18 | AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| 19 | CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| 20 | |
| 21 | Except as contained in this notice, the name of The Open Group shall not be |
| 22 | used in advertising or otherwise to promote the sale, use or other dealings |
| 23 | in this Software without prior written authorization from The Open Group. |
| 24 | |
| 25 | ********************************************************/ |
| 26 | |
| 27 | /* THIS IS NOT AN X CONSORTIUM STANDARD OR AN X PROJECT TEAM SPECIFICATION */ |
| 28 | |
| 29 | #define SHM |
| 30 | |
| 31 | #ifdef HAVE_DIX_CONFIG_H |
| 32 | #include <dix-config.h> |
| 33 | #endif |
| 34 | |
| 35 | #include <sys/types.h> |
| 36 | #include <sys/ipc.h> |
| 37 | #include <sys/shm.h> |
| 38 | #include <unistd.h> |
| 39 | #include <sys/stat.h> |
| 40 | #include <fcntl.h> |
| 41 | #include <X11/X.h> |
| 42 | #include <X11/Xproto.h> |
| 43 | #include "misc.h" |
| 44 | #include "os.h" |
| 45 | #include "dixstruct.h" |
| 46 | #include "resource.h" |
| 47 | #include "scrnintstr.h" |
| 48 | #include "windowstr.h" |
| 49 | #include "pixmapstr.h" |
| 50 | #include "gcstruct.h" |
| 51 | #include "extnsionst.h" |
| 52 | #include "servermd.h" |
| 53 | #include "shmint.h" |
| 54 | #include "xace.h" |
| 55 | #include <X11/extensions/shmproto.h> |
| 56 | #include <X11/Xfuncproto.h> |
| 57 | #include <sys/mman.h> |
| 58 | #include "protocol-versions.h" |
| 59 | #include "busfault.h" |
| 60 | |
| 61 | /* Needed for Solaris cross-zone shared memory extension */ |
| 62 | #ifdef HAVE_SHMCTL64 |
| 63 | #include <sys/ipc_impl.h> |
| 64 | #define SHMSTAT(id, buf) shmctl64(id, IPC_STAT64, buf) |
| 65 | #define SHMSTAT_TYPE struct shmid_ds64 |
| 66 | #define SHMPERM_TYPE struct ipc_perm64 |
| 67 | #define SHM_PERM(buf) buf.shmx_perm |
| 68 | #define SHM_SEGSZ(buf) buf.shmx_segsz |
| 69 | #define SHMPERM_UID(p) p->ipcx_uid |
| 70 | #define SHMPERM_CUID(p) p->ipcx_cuid |
| 71 | #define SHMPERM_GID(p) p->ipcx_gid |
| 72 | #define SHMPERM_CGID(p) p->ipcx_cgid |
| 73 | #define SHMPERM_MODE(p) p->ipcx_mode |
| 74 | #define SHMPERM_ZONEID(p) p->ipcx_zoneid |
| 75 | #else |
| 76 | #define SHMSTAT(id, buf) shmctl(id, IPC_STAT, buf) |
| 77 | #define SHMSTAT_TYPE struct shmid_ds |
| 78 | #define SHMPERM_TYPE struct ipc_perm |
| 79 | #define SHM_PERM(buf) buf.shm_perm |
| 80 | #define SHM_SEGSZ(buf) buf.shm_segsz |
| 81 | #define SHMPERM_UID(p) p->uid |
| 82 | #define SHMPERM_CUID(p) p->cuid |
| 83 | #define SHMPERM_GID(p) p->gid |
| 84 | #define SHMPERM_CGID(p) p->cgid |
| 85 | #define SHMPERM_MODE(p) p->mode |
| 86 | #endif |
| 87 | |
| 88 | #ifdef PANORAMIX |
| 89 | #include "panoramiX.h" |
| 90 | #include "panoramiXsrv.h" |
| 91 | #endif |
| 92 | |
| 93 | #include "extinit.h" |
| 94 | |
| 95 | typedef struct _ShmScrPrivateRec { |
| 96 | CloseScreenProcPtr CloseScreen; |
| 97 | ShmFuncsPtr shmFuncs; |
| 98 | DestroyPixmapProcPtr destroyPixmap; |
| 99 | } ShmScrPrivateRec; |
| 100 | |
| 101 | static PixmapPtr fbShmCreatePixmap(XSHM_CREATE_PIXMAP_ARGS); |
| 102 | static int ShmDetachSegment(pointer /* value */ , |
| 103 | XID /* shmseg */ |
| 104 | ); |
| 105 | static void ShmResetProc(ExtensionEntry * /* extEntry */ |
| 106 | ); |
| 107 | static void SShmCompletionEvent(xShmCompletionEvent * /* from */ , |
| 108 | xShmCompletionEvent * /* to */ |
| 109 | ); |
| 110 | |
| 111 | static Bool ShmDestroyPixmap(PixmapPtr pPixmap); |
| 112 | |
| 113 | static unsigned char ShmReqCode; |
| 114 | int ShmCompletionCode; |
| 115 | int BadShmSegCode; |
| 116 | RESTYPE ShmSegType; |
| 117 | static ShmDescPtr Shmsegs; |
| 118 | static Bool sharedPixmaps; |
| 119 | static DevPrivateKeyRec shmScrPrivateKeyRec; |
| 120 | |
| 121 | #define shmScrPrivateKey (&shmScrPrivateKeyRec) |
| 122 | static DevPrivateKeyRec shmPixmapPrivateKeyRec; |
| 123 | |
| 124 | #define shmPixmapPrivateKey (&shmPixmapPrivateKeyRec) |
| 125 | static ShmFuncs miFuncs = { NULL, NULL }; |
| 126 | static ShmFuncs fbFuncs = { fbShmCreatePixmap, NULL }; |
| 127 | |
| 128 | #define ShmGetScreenPriv(s) ((ShmScrPrivateRec *)dixLookupPrivate(&(s)->devPrivates, shmScrPrivateKey)) |
| 129 | |
| 130 | #define VERIFY_SHMSEG(shmseg,shmdesc,client) \ |
| 131 | { \ |
| 132 | int tmprc; \ |
| 133 | tmprc = dixLookupResourceByType((pointer *)&(shmdesc), shmseg, ShmSegType, \ |
| 134 | client, DixReadAccess); \ |
| 135 | if (tmprc != Success) \ |
| 136 | return tmprc; \ |
| 137 | } |
| 138 | |
| 139 | #define VERIFY_SHMPTR(shmseg,offset,needwrite,shmdesc,client) \ |
| 140 | { \ |
| 141 | VERIFY_SHMSEG(shmseg, shmdesc, client); \ |
| 142 | if ((offset & 3) || (offset > shmdesc->size)) \ |
| 143 | { \ |
| 144 | client->errorValue = offset; \ |
| 145 | return BadValue; \ |
| 146 | } \ |
| 147 | if (needwrite && !shmdesc->writable) \ |
| 148 | return BadAccess; \ |
| 149 | } |
| 150 | |
| 151 | #define VERIFY_SHMSIZE(shmdesc,offset,len,client) \ |
| 152 | { \ |
| 153 | if ((offset + len) > shmdesc->size) \ |
| 154 | { \ |
| 155 | return BadAccess; \ |
| 156 | } \ |
| 157 | } |
| 158 | |
| 159 | #if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__CYGWIN__) || defined(__DragonFly__) |
| 160 | #include <sys/signal.h> |
| 161 | |
| 162 | static Bool badSysCall = FALSE; |
| 163 | |
| 164 | static void |
| 165 | SigSysHandler(int signo) |
| 166 | { |
| 167 | badSysCall = TRUE; |
| 168 | } |
| 169 | |
| 170 | static Bool |
| 171 | CheckForShmSyscall(void) |
| 172 | { |
| 173 | void (*oldHandler) (int); |
| 174 | int shmid = -1; |
| 175 | |
| 176 | /* If no SHM support in the kernel, the bad syscall will generate SIGSYS */ |
| 177 | oldHandler = signal(SIGSYS, SigSysHandler); |
| 178 | |
| 179 | badSysCall = FALSE; |
| 180 | shmid = shmget(IPC_PRIVATE, 4096, IPC_CREAT); |
| 181 | |
| 182 | if (shmid != -1) { |
| 183 | /* Successful allocation - clean up */ |
| 184 | shmctl(shmid, IPC_RMID, NULL); |
| 185 | } |
| 186 | else { |
| 187 | /* Allocation failed */ |
| 188 | badSysCall = TRUE; |
| 189 | } |
| 190 | signal(SIGSYS, oldHandler); |
| 191 | return !badSysCall; |
| 192 | } |
| 193 | |
| 194 | #define MUST_CHECK_FOR_SHM_SYSCALL |
| 195 | |
| 196 | #endif |
| 197 | |
| 198 | static Bool |
| 199 | ShmCloseScreen(ScreenPtr pScreen) |
| 200 | { |
| 201 | ShmScrPrivateRec *screen_priv = ShmGetScreenPriv(pScreen); |
| 202 | |
| 203 | pScreen->CloseScreen = screen_priv->CloseScreen; |
| 204 | dixSetPrivate(&pScreen->devPrivates, shmScrPrivateKey, NULL); |
| 205 | free(screen_priv); |
| 206 | return (*pScreen->CloseScreen) (pScreen); |
| 207 | } |
| 208 | |
| 209 | static ShmScrPrivateRec * |
| 210 | ShmInitScreenPriv(ScreenPtr pScreen) |
| 211 | { |
| 212 | ShmScrPrivateRec *screen_priv = ShmGetScreenPriv(pScreen); |
| 213 | |
| 214 | if (!screen_priv) { |
| 215 | screen_priv = calloc(1, sizeof(ShmScrPrivateRec)); |
| 216 | screen_priv->CloseScreen = pScreen->CloseScreen; |
| 217 | dixSetPrivate(&pScreen->devPrivates, shmScrPrivateKey, screen_priv); |
| 218 | pScreen->CloseScreen = ShmCloseScreen; |
| 219 | } |
| 220 | return screen_priv; |
| 221 | } |
| 222 | |
| 223 | static Bool |
| 224 | ShmRegisterPrivates(void) |
| 225 | { |
| 226 | if (!dixRegisterPrivateKey(&shmScrPrivateKeyRec, PRIVATE_SCREEN, 0)) |
| 227 | return FALSE; |
| 228 | if (!dixRegisterPrivateKey(&shmPixmapPrivateKeyRec, PRIVATE_PIXMAP, 0)) |
| 229 | return FALSE; |
| 230 | return TRUE; |
| 231 | } |
| 232 | |
| 233 | /*ARGSUSED*/ static void |
| 234 | ShmResetProc(ExtensionEntry * extEntry) |
| 235 | { |
| 236 | int i; |
| 237 | |
| 238 | for (i = 0; i < screenInfo.numScreens; i++) |
| 239 | ShmRegisterFuncs(screenInfo.screens[i], NULL); |
| 240 | } |
| 241 | |
| 242 | void |
| 243 | ShmRegisterFuncs(ScreenPtr pScreen, ShmFuncsPtr funcs) |
| 244 | { |
| 245 | if (!ShmRegisterPrivates()) |
| 246 | return; |
| 247 | ShmInitScreenPriv(pScreen)->shmFuncs = funcs; |
| 248 | } |
| 249 | |
| 250 | static Bool |
| 251 | ShmDestroyPixmap(PixmapPtr pPixmap) |
| 252 | { |
| 253 | ScreenPtr pScreen = pPixmap->drawable.pScreen; |
| 254 | ShmScrPrivateRec *screen_priv = ShmGetScreenPriv(pScreen); |
| 255 | Bool ret; |
| 256 | |
| 257 | if (pPixmap->refcnt == 1) { |
| 258 | ShmDescPtr shmdesc; |
| 259 | |
| 260 | shmdesc = (ShmDescPtr) dixLookupPrivate(&pPixmap->devPrivates, |
| 261 | shmPixmapPrivateKey); |
| 262 | if (shmdesc) |
| 263 | ShmDetachSegment((pointer) shmdesc, pPixmap->drawable.id); |
| 264 | } |
| 265 | |
| 266 | pScreen->DestroyPixmap = screen_priv->destroyPixmap; |
| 267 | ret = (*pScreen->DestroyPixmap) (pPixmap); |
| 268 | screen_priv->destroyPixmap = pScreen->DestroyPixmap; |
| 269 | pScreen->DestroyPixmap = ShmDestroyPixmap; |
| 270 | return ret; |
| 271 | } |
| 272 | |
| 273 | void |
| 274 | ShmRegisterFbFuncs(ScreenPtr pScreen) |
| 275 | { |
| 276 | ShmRegisterFuncs(pScreen, &fbFuncs); |
| 277 | } |
| 278 | |
| 279 | static int |
| 280 | ProcShmQueryVersion(ClientPtr client) |
| 281 | { |
| 282 | xShmQueryVersionReply rep = { |
| 283 | .type = X_Reply, |
| 284 | .sharedPixmaps = sharedPixmaps, |
| 285 | .sequenceNumber = client->sequence, |
| 286 | .length = 0, |
| 287 | .majorVersion = SERVER_SHM_MAJOR_VERSION, |
| 288 | .minorVersion = SERVER_SHM_MINOR_VERSION, |
| 289 | .uid = geteuid(), |
| 290 | .gid = getegid(), |
| 291 | .pixmapFormat = sharedPixmaps ? ZPixmap : 0 |
| 292 | }; |
| 293 | |
| 294 | REQUEST_SIZE_MATCH(xShmQueryVersionReq); |
| 295 | |
| 296 | if (client->swapped) { |
| 297 | swaps(&rep.sequenceNumber); |
| 298 | swapl(&rep.length); |
| 299 | swaps(&rep.majorVersion); |
| 300 | swaps(&rep.minorVersion); |
| 301 | swaps(&rep.uid); |
| 302 | swaps(&rep.gid); |
| 303 | } |
| 304 | WriteToClient(client, sizeof(xShmQueryVersionReply), &rep); |
| 305 | return Success; |
| 306 | } |
| 307 | |
| 308 | /* |
| 309 | * Simulate the access() system call for a shared memory segement, |
| 310 | * using the credentials from the client if available |
| 311 | */ |
| 312 | static int |
| 313 | shm_access(ClientPtr client, SHMPERM_TYPE * perm, int readonly) |
| 314 | { |
| 315 | int uid, gid; |
| 316 | mode_t mask; |
| 317 | int uidset = 0, gidset = 0; |
| 318 | LocalClientCredRec *lcc; |
| 319 | |
| 320 | if (GetLocalClientCreds(client, &lcc) != -1) { |
| 321 | |
| 322 | if (lcc->fieldsSet & LCC_UID_SET) { |
| 323 | uid = lcc->euid; |
| 324 | uidset = 1; |
| 325 | } |
| 326 | if (lcc->fieldsSet & LCC_GID_SET) { |
| 327 | gid = lcc->egid; |
| 328 | gidset = 1; |
| 329 | } |
| 330 | |
| 331 | #if defined(HAVE_GETZONEID) && defined(SHMPERM_ZONEID) |
| 332 | if (((lcc->fieldsSet & LCC_ZID_SET) == 0) || (lcc->zoneid == -1) |
| 333 | || (lcc->zoneid != SHMPERM_ZONEID(perm))) { |
| 334 | uidset = 0; |
| 335 | gidset = 0; |
| 336 | } |
| 337 | #endif |
| 338 | FreeLocalClientCreds(lcc); |
| 339 | |
| 340 | if (uidset) { |
| 341 | /* User id 0 always gets access */ |
| 342 | if (uid == 0) { |
| 343 | return 0; |
| 344 | } |
| 345 | /* Check the owner */ |
| 346 | if (SHMPERM_UID(perm) == uid || SHMPERM_CUID(perm) == uid) { |
| 347 | mask = S_IRUSR; |
| 348 | if (!readonly) { |
| 349 | mask |= S_IWUSR; |
| 350 | } |
| 351 | return (SHMPERM_MODE(perm) & mask) == mask ? 0 : -1; |
| 352 | } |
| 353 | } |
| 354 | |
| 355 | if (gidset) { |
| 356 | /* Check the group */ |
| 357 | if (SHMPERM_GID(perm) == gid || SHMPERM_CGID(perm) == gid) { |
| 358 | mask = S_IRGRP; |
| 359 | if (!readonly) { |
| 360 | mask |= S_IWGRP; |
| 361 | } |
| 362 | return (SHMPERM_MODE(perm) & mask) == mask ? 0 : -1; |
| 363 | } |
| 364 | } |
| 365 | } |
| 366 | /* Otherwise, check everyone else */ |
| 367 | mask = S_IROTH; |
| 368 | if (!readonly) { |
| 369 | mask |= S_IWOTH; |
| 370 | } |
| 371 | return (SHMPERM_MODE(perm) & mask) == mask ? 0 : -1; |
| 372 | } |
| 373 | |
| 374 | static int |
| 375 | ProcShmAttach(ClientPtr client) |
| 376 | { |
| 377 | SHMSTAT_TYPE buf; |
| 378 | ShmDescPtr shmdesc; |
| 379 | |
| 380 | REQUEST(xShmAttachReq); |
| 381 | |
| 382 | REQUEST_SIZE_MATCH(xShmAttachReq); |
| 383 | LEGAL_NEW_RESOURCE(stuff->shmseg, client); |
| 384 | if ((stuff->readOnly != xTrue) && (stuff->readOnly != xFalse)) { |
| 385 | client->errorValue = stuff->readOnly; |
| 386 | return BadValue; |
| 387 | } |
| 388 | for (shmdesc = Shmsegs; shmdesc; shmdesc = shmdesc->next) { |
| 389 | if (!SHMDESC_IS_FD(shmdesc) && shmdesc->shmid == stuff->shmid) |
| 390 | break; |
| 391 | } |
| 392 | if (shmdesc) { |
| 393 | if (!stuff->readOnly && !shmdesc->writable) |
| 394 | return BadAccess; |
| 395 | shmdesc->refcnt++; |
| 396 | } |
| 397 | else { |
| 398 | shmdesc = malloc(sizeof(ShmDescRec)); |
| 399 | if (!shmdesc) |
| 400 | return BadAlloc; |
| 401 | #ifdef SHM_FD_PASSING |
| 402 | shmdesc->is_fd = FALSE; |
| 403 | #endif |
| 404 | shmdesc->addr = shmat(stuff->shmid, 0, |
| 405 | stuff->readOnly ? SHM_RDONLY : 0); |
| 406 | if ((shmdesc->addr == ((char *) -1)) || SHMSTAT(stuff->shmid, &buf)) { |
| 407 | free(shmdesc); |
| 408 | return BadAccess; |
| 409 | } |
| 410 | |
| 411 | /* The attach was performed with root privs. We must |
| 412 | * do manual checking of access rights for the credentials |
| 413 | * of the client */ |
| 414 | |
| 415 | if (shm_access(client, &(SHM_PERM(buf)), stuff->readOnly) == -1) { |
| 416 | shmdt(shmdesc->addr); |
| 417 | free(shmdesc); |
| 418 | return BadAccess; |
| 419 | } |
| 420 | |
| 421 | shmdesc->shmid = stuff->shmid; |
| 422 | shmdesc->refcnt = 1; |
| 423 | shmdesc->writable = !stuff->readOnly; |
| 424 | shmdesc->size = SHM_SEGSZ(buf); |
| 425 | shmdesc->next = Shmsegs; |
| 426 | Shmsegs = shmdesc; |
| 427 | } |
| 428 | if (!AddResource(stuff->shmseg, ShmSegType, (pointer) shmdesc)) |
| 429 | return BadAlloc; |
| 430 | return Success; |
| 431 | } |
| 432 | |
| 433 | /*ARGSUSED*/ static int |
| 434 | ShmDetachSegment(pointer value, /* must conform to DeleteType */ |
| 435 | XID shmseg) |
| 436 | { |
| 437 | ShmDescPtr shmdesc = (ShmDescPtr) value; |
| 438 | ShmDescPtr *prev; |
| 439 | |
| 440 | if (--shmdesc->refcnt) |
| 441 | return TRUE; |
| 442 | #if SHM_FD_PASSING |
| 443 | if (shmdesc->is_fd) { |
| 444 | if (shmdesc->busfault) |
| 445 | busfault_unregister(shmdesc->busfault); |
| 446 | munmap(shmdesc->addr, shmdesc->size); |
| 447 | } else |
| 448 | #endif |
| 449 | shmdt(shmdesc->addr); |
| 450 | for (prev = &Shmsegs; *prev != shmdesc; prev = &(*prev)->next); |
| 451 | *prev = shmdesc->next; |
| 452 | free(shmdesc); |
| 453 | return Success; |
| 454 | } |
| 455 | |
| 456 | static int |
| 457 | ProcShmDetach(ClientPtr client) |
| 458 | { |
| 459 | ShmDescPtr shmdesc; |
| 460 | |
| 461 | REQUEST(xShmDetachReq); |
| 462 | |
| 463 | REQUEST_SIZE_MATCH(xShmDetachReq); |
| 464 | VERIFY_SHMSEG(stuff->shmseg, shmdesc, client); |
| 465 | FreeResource(stuff->shmseg, RT_NONE); |
| 466 | return Success; |
| 467 | } |
| 468 | |
| 469 | /* |
| 470 | * If the given request doesn't exactly match PutImage's constraints, |
| 471 | * wrap the image in a scratch pixmap header and let CopyArea sort it out. |
| 472 | */ |
| 473 | static void |
| 474 | doShmPutImage(DrawablePtr dst, GCPtr pGC, |
| 475 | int depth, unsigned int format, |
| 476 | int w, int h, int sx, int sy, int sw, int sh, int dx, int dy, |
| 477 | char *data) |
| 478 | { |
| 479 | PixmapPtr pPixmap; |
| 480 | |
| 481 | if (format == ZPixmap || (format == XYPixmap && depth == 1)) { |
| 482 | pPixmap = GetScratchPixmapHeader(dst->pScreen, w, h, depth, |
| 483 | BitsPerPixel(depth), |
| 484 | PixmapBytePad(w, depth), data); |
| 485 | if (!pPixmap) |
| 486 | return; |
| 487 | pGC->ops->CopyArea((DrawablePtr) pPixmap, dst, pGC, sx, sy, sw, sh, dx, |
| 488 | dy); |
| 489 | FreeScratchPixmapHeader(pPixmap); |
| 490 | } |
| 491 | else { |
| 492 | GCPtr putGC = GetScratchGC(depth, dst->pScreen); |
| 493 | |
| 494 | if (!putGC) |
| 495 | return; |
| 496 | |
| 497 | pPixmap = (*dst->pScreen->CreatePixmap) (dst->pScreen, sw, sh, depth, |
| 498 | CREATE_PIXMAP_USAGE_SCRATCH); |
| 499 | if (!pPixmap) { |
| 500 | FreeScratchGC(putGC); |
| 501 | return; |
| 502 | } |
| 503 | ValidateGC(&pPixmap->drawable, putGC); |
| 504 | (*putGC->ops->PutImage) (&pPixmap->drawable, putGC, depth, -sx, -sy, w, |
| 505 | h, 0, |
| 506 | (format == XYPixmap) ? XYPixmap : ZPixmap, |
| 507 | data); |
| 508 | FreeScratchGC(putGC); |
| 509 | if (format == XYBitmap) |
| 510 | (void) (*pGC->ops->CopyPlane) (&pPixmap->drawable, dst, pGC, 0, 0, |
| 511 | sw, sh, dx, dy, 1L); |
| 512 | else |
| 513 | (void) (*pGC->ops->CopyArea) (&pPixmap->drawable, dst, pGC, 0, 0, |
| 514 | sw, sh, dx, dy); |
| 515 | (*pPixmap->drawable.pScreen->DestroyPixmap) (pPixmap); |
| 516 | } |
| 517 | } |
| 518 | |
| 519 | static int |
| 520 | ProcShmPutImage(ClientPtr client) |
| 521 | { |
| 522 | GCPtr pGC; |
| 523 | DrawablePtr pDraw; |
| 524 | long length; |
| 525 | ShmDescPtr shmdesc; |
| 526 | |
| 527 | REQUEST(xShmPutImageReq); |
| 528 | |
| 529 | REQUEST_SIZE_MATCH(xShmPutImageReq); |
| 530 | VALIDATE_DRAWABLE_AND_GC(stuff->drawable, pDraw, DixWriteAccess); |
| 531 | VERIFY_SHMPTR(stuff->shmseg, stuff->offset, FALSE, shmdesc, client); |
| 532 | if ((stuff->sendEvent != xTrue) && (stuff->sendEvent != xFalse)) |
| 533 | return BadValue; |
| 534 | if (stuff->format == XYBitmap) { |
| 535 | if (stuff->depth != 1) |
| 536 | return BadMatch; |
| 537 | length = PixmapBytePad(stuff->totalWidth, 1); |
| 538 | } |
| 539 | else if (stuff->format == XYPixmap) { |
| 540 | if (pDraw->depth != stuff->depth) |
| 541 | return BadMatch; |
| 542 | length = PixmapBytePad(stuff->totalWidth, 1); |
| 543 | length *= stuff->depth; |
| 544 | } |
| 545 | else if (stuff->format == ZPixmap) { |
| 546 | if (pDraw->depth != stuff->depth) |
| 547 | return BadMatch; |
| 548 | length = PixmapBytePad(stuff->totalWidth, stuff->depth); |
| 549 | } |
| 550 | else { |
| 551 | client->errorValue = stuff->format; |
| 552 | return BadValue; |
| 553 | } |
| 554 | |
| 555 | /* |
| 556 | * There's a potential integer overflow in this check: |
| 557 | * VERIFY_SHMSIZE(shmdesc, stuff->offset, length * stuff->totalHeight, |
| 558 | * client); |
| 559 | * the version below ought to avoid it |
| 560 | */ |
| 561 | if (stuff->totalHeight != 0 && |
| 562 | length > (shmdesc->size - stuff->offset) / stuff->totalHeight) { |
| 563 | client->errorValue = stuff->totalWidth; |
| 564 | return BadValue; |
| 565 | } |
| 566 | if (stuff->srcX > stuff->totalWidth) { |
| 567 | client->errorValue = stuff->srcX; |
| 568 | return BadValue; |
| 569 | } |
| 570 | if (stuff->srcY > stuff->totalHeight) { |
| 571 | client->errorValue = stuff->srcY; |
| 572 | return BadValue; |
| 573 | } |
| 574 | if ((stuff->srcX + stuff->srcWidth) > stuff->totalWidth) { |
| 575 | client->errorValue = stuff->srcWidth; |
| 576 | return BadValue; |
| 577 | } |
| 578 | if ((stuff->srcY + stuff->srcHeight) > stuff->totalHeight) { |
| 579 | client->errorValue = stuff->srcHeight; |
| 580 | return BadValue; |
| 581 | } |
| 582 | |
| 583 | if ((((stuff->format == ZPixmap) && (stuff->srcX == 0)) || |
| 584 | ((stuff->format != ZPixmap) && |
| 585 | (stuff->srcX < screenInfo.bitmapScanlinePad) && |
| 586 | ((stuff->format == XYBitmap) || |
| 587 | ((stuff->srcY == 0) && |
| 588 | (stuff->srcHeight == stuff->totalHeight))))) && |
| 589 | ((stuff->srcX + stuff->srcWidth) == stuff->totalWidth)) |
| 590 | (*pGC->ops->PutImage) (pDraw, pGC, stuff->depth, |
| 591 | stuff->dstX, stuff->dstY, |
| 592 | stuff->totalWidth, stuff->srcHeight, |
| 593 | stuff->srcX, stuff->format, |
| 594 | shmdesc->addr + stuff->offset + |
| 595 | (stuff->srcY * length)); |
| 596 | else |
| 597 | doShmPutImage(pDraw, pGC, stuff->depth, stuff->format, |
| 598 | stuff->totalWidth, stuff->totalHeight, |
| 599 | stuff->srcX, stuff->srcY, |
| 600 | stuff->srcWidth, stuff->srcHeight, |
| 601 | stuff->dstX, stuff->dstY, shmdesc->addr + stuff->offset); |
| 602 | |
| 603 | if (stuff->sendEvent) { |
| 604 | xShmCompletionEvent ev = { |
| 605 | .type = ShmCompletionCode, |
| 606 | .drawable = stuff->drawable, |
| 607 | .minorEvent = X_ShmPutImage, |
| 608 | .majorEvent = ShmReqCode, |
| 609 | .shmseg = stuff->shmseg, |
| 610 | .offset = stuff->offset |
| 611 | }; |
| 612 | WriteEventsToClient(client, 1, (xEvent *) &ev); |
| 613 | } |
| 614 | |
| 615 | return Success; |
| 616 | } |
| 617 | |
| 618 | static int |
| 619 | ProcShmGetImage(ClientPtr client) |
| 620 | { |
| 621 | DrawablePtr pDraw; |
| 622 | long lenPer = 0, length; |
| 623 | Mask plane = 0; |
| 624 | xShmGetImageReply xgi; |
| 625 | ShmDescPtr shmdesc; |
| 626 | VisualID visual = None; |
| 627 | int rc; |
| 628 | |
| 629 | REQUEST(xShmGetImageReq); |
| 630 | |
| 631 | REQUEST_SIZE_MATCH(xShmGetImageReq); |
| 632 | if ((stuff->format != XYPixmap) && (stuff->format != ZPixmap)) { |
| 633 | client->errorValue = stuff->format; |
| 634 | return BadValue; |
| 635 | } |
| 636 | rc = dixLookupDrawable(&pDraw, stuff->drawable, client, 0, DixReadAccess); |
| 637 | if (rc != Success) |
| 638 | return rc; |
| 639 | VERIFY_SHMPTR(stuff->shmseg, stuff->offset, TRUE, shmdesc, client); |
| 640 | if (pDraw->type == DRAWABLE_WINDOW) { |
| 641 | if ( /* check for being viewable */ |
| 642 | !((WindowPtr) pDraw)->realized || |
| 643 | /* check for being on screen */ |
| 644 | pDraw->x + stuff->x < 0 || |
| 645 | pDraw->x + stuff->x + (int) stuff->width > pDraw->pScreen->width |
| 646 | || pDraw->y + stuff->y < 0 || |
| 647 | pDraw->y + stuff->y + (int) stuff->height > |
| 648 | pDraw->pScreen->height || |
| 649 | /* check for being inside of border */ |
| 650 | stuff->x < -wBorderWidth((WindowPtr) pDraw) || |
| 651 | stuff->x + (int) stuff->width > |
| 652 | wBorderWidth((WindowPtr) pDraw) + (int) pDraw->width || |
| 653 | stuff->y < -wBorderWidth((WindowPtr) pDraw) || |
| 654 | stuff->y + (int) stuff->height > |
| 655 | wBorderWidth((WindowPtr) pDraw) + (int) pDraw->height) |
| 656 | return BadMatch; |
| 657 | visual = wVisual(((WindowPtr) pDraw)); |
| 658 | } |
| 659 | else { |
| 660 | if (stuff->x < 0 || |
| 661 | stuff->x + (int) stuff->width > pDraw->width || |
| 662 | stuff->y < 0 || stuff->y + (int) stuff->height > pDraw->height) |
| 663 | return BadMatch; |
| 664 | visual = None; |
| 665 | } |
| 666 | xgi = (xShmGetImageReply) { |
| 667 | .type = X_Reply, |
| 668 | .sequenceNumber = client->sequence, |
| 669 | .length = 0, |
| 670 | .visual = visual, |
| 671 | .depth = pDraw->depth |
| 672 | }; |
| 673 | if (stuff->format == ZPixmap) { |
| 674 | length = PixmapBytePad(stuff->width, pDraw->depth) * stuff->height; |
| 675 | } |
| 676 | else { |
| 677 | lenPer = PixmapBytePad(stuff->width, 1) * stuff->height; |
| 678 | plane = ((Mask) 1) << (pDraw->depth - 1); |
| 679 | /* only planes asked for */ |
| 680 | length = lenPer * Ones(stuff->planeMask & (plane | (plane - 1))); |
| 681 | } |
| 682 | |
| 683 | VERIFY_SHMSIZE(shmdesc, stuff->offset, length, client); |
| 684 | xgi.size = length; |
| 685 | |
| 686 | if (length == 0) { |
| 687 | /* nothing to do */ |
| 688 | } |
| 689 | else if (stuff->format == ZPixmap) { |
| 690 | (*pDraw->pScreen->GetImage) (pDraw, stuff->x, stuff->y, |
| 691 | stuff->width, stuff->height, |
| 692 | stuff->format, stuff->planeMask, |
| 693 | shmdesc->addr + stuff->offset); |
| 694 | } |
| 695 | else { |
| 696 | |
| 697 | length = stuff->offset; |
| 698 | for (; plane; plane >>= 1) { |
| 699 | if (stuff->planeMask & plane) { |
| 700 | (*pDraw->pScreen->GetImage) (pDraw, |
| 701 | stuff->x, stuff->y, |
| 702 | stuff->width, stuff->height, |
| 703 | stuff->format, plane, |
| 704 | shmdesc->addr + length); |
| 705 | length += lenPer; |
| 706 | } |
| 707 | } |
| 708 | } |
| 709 | |
| 710 | if (client->swapped) { |
| 711 | swaps(&xgi.sequenceNumber); |
| 712 | swapl(&xgi.length); |
| 713 | swapl(&xgi.visual); |
| 714 | swapl(&xgi.size); |
| 715 | } |
| 716 | WriteToClient(client, sizeof(xShmGetImageReply), &xgi); |
| 717 | |
| 718 | return Success; |
| 719 | } |
| 720 | |
| 721 | #ifdef PANORAMIX |
| 722 | static int |
| 723 | ProcPanoramiXShmPutImage(ClientPtr client) |
| 724 | { |
| 725 | int j, result, orig_x, orig_y; |
| 726 | PanoramiXRes *draw, *gc; |
| 727 | Bool sendEvent, isRoot; |
| 728 | |
| 729 | REQUEST(xShmPutImageReq); |
| 730 | REQUEST_SIZE_MATCH(xShmPutImageReq); |
| 731 | |
| 732 | result = dixLookupResourceByClass((pointer *) &draw, stuff->drawable, |
| 733 | XRC_DRAWABLE, client, DixWriteAccess); |
| 734 | if (result != Success) |
| 735 | return (result == BadValue) ? BadDrawable : result; |
| 736 | |
| 737 | result = dixLookupResourceByType((pointer *) &gc, stuff->gc, |
| 738 | XRT_GC, client, DixReadAccess); |
| 739 | if (result != Success) |
| 740 | return result; |
| 741 | |
| 742 | isRoot = (draw->type == XRT_WINDOW) && draw->u.win.root; |
| 743 | |
| 744 | orig_x = stuff->dstX; |
| 745 | orig_y = stuff->dstY; |
| 746 | sendEvent = stuff->sendEvent; |
| 747 | stuff->sendEvent = 0; |
| 748 | FOR_NSCREENS(j) { |
| 749 | if (!j) |
| 750 | stuff->sendEvent = sendEvent; |
| 751 | stuff->drawable = draw->info[j].id; |
| 752 | stuff->gc = gc->info[j].id; |
| 753 | if (isRoot) { |
| 754 | stuff->dstX = orig_x - screenInfo.screens[j]->x; |
| 755 | stuff->dstY = orig_y - screenInfo.screens[j]->y; |
| 756 | } |
| 757 | result = ProcShmPutImage(client); |
| 758 | if (result != Success) |
| 759 | break; |
| 760 | } |
| 761 | return result; |
| 762 | } |
| 763 | |
| 764 | static int |
| 765 | ProcPanoramiXShmGetImage(ClientPtr client) |
| 766 | { |
| 767 | PanoramiXRes *draw; |
| 768 | DrawablePtr *drawables; |
| 769 | DrawablePtr pDraw; |
| 770 | xShmGetImageReply xgi; |
| 771 | ShmDescPtr shmdesc; |
| 772 | int i, x, y, w, h, format, rc; |
| 773 | Mask plane = 0, planemask; |
| 774 | long lenPer = 0, length, widthBytesLine; |
| 775 | Bool isRoot; |
| 776 | |
| 777 | REQUEST(xShmGetImageReq); |
| 778 | |
| 779 | REQUEST_SIZE_MATCH(xShmGetImageReq); |
| 780 | |
| 781 | if ((stuff->format != XYPixmap) && (stuff->format != ZPixmap)) { |
| 782 | client->errorValue = stuff->format; |
| 783 | return BadValue; |
| 784 | } |
| 785 | |
| 786 | rc = dixLookupResourceByClass((pointer *) &draw, stuff->drawable, |
| 787 | XRC_DRAWABLE, client, DixWriteAccess); |
| 788 | if (rc != Success) |
| 789 | return (rc == BadValue) ? BadDrawable : rc; |
| 790 | |
| 791 | if (draw->type == XRT_PIXMAP) |
| 792 | return ProcShmGetImage(client); |
| 793 | |
| 794 | rc = dixLookupDrawable(&pDraw, stuff->drawable, client, 0, DixReadAccess); |
| 795 | if (rc != Success) |
| 796 | return rc; |
| 797 | |
| 798 | VERIFY_SHMPTR(stuff->shmseg, stuff->offset, TRUE, shmdesc, client); |
| 799 | |
| 800 | x = stuff->x; |
| 801 | y = stuff->y; |
| 802 | w = stuff->width; |
| 803 | h = stuff->height; |
| 804 | format = stuff->format; |
| 805 | planemask = stuff->planeMask; |
| 806 | |
| 807 | isRoot = (draw->type == XRT_WINDOW) && draw->u.win.root; |
| 808 | |
| 809 | if (isRoot) { |
| 810 | if ( /* check for being onscreen */ |
| 811 | x < 0 || x + w > PanoramiXPixWidth || |
| 812 | y < 0 || y + h > PanoramiXPixHeight) |
| 813 | return BadMatch; |
| 814 | } |
| 815 | else { |
| 816 | if ( /* check for being onscreen */ |
| 817 | screenInfo.screens[0]->x + pDraw->x + x < 0 || |
| 818 | screenInfo.screens[0]->x + pDraw->x + x + w > PanoramiXPixWidth |
| 819 | || screenInfo.screens[0]->y + pDraw->y + y < 0 || |
| 820 | screenInfo.screens[0]->y + pDraw->y + y + h > PanoramiXPixHeight |
| 821 | || |
| 822 | /* check for being inside of border */ |
| 823 | x < -wBorderWidth((WindowPtr) pDraw) || |
| 824 | x + w > wBorderWidth((WindowPtr) pDraw) + (int) pDraw->width || |
| 825 | y < -wBorderWidth((WindowPtr) pDraw) || |
| 826 | y + h > wBorderWidth((WindowPtr) pDraw) + (int) pDraw->height) |
| 827 | return BadMatch; |
| 828 | } |
| 829 | |
| 830 | drawables = calloc(PanoramiXNumScreens, sizeof(DrawablePtr)); |
| 831 | if (!drawables) |
| 832 | return BadAlloc; |
| 833 | |
| 834 | drawables[0] = pDraw; |
| 835 | FOR_NSCREENS_FORWARD_SKIP(i) { |
| 836 | rc = dixLookupDrawable(drawables + i, draw->info[i].id, client, 0, |
| 837 | DixReadAccess); |
| 838 | if (rc != Success) { |
| 839 | free(drawables); |
| 840 | return rc; |
| 841 | } |
| 842 | } |
| 843 | |
| 844 | xgi = (xShmGetImageReply) { |
| 845 | .type = X_Reply, |
| 846 | .sequenceNumber = client->sequence, |
| 847 | .length = 0, |
| 848 | .visual = wVisual(((WindowPtr) pDraw)), |
| 849 | .depth = pDraw->depth |
| 850 | }; |
| 851 | |
| 852 | if (format == ZPixmap) { |
| 853 | widthBytesLine = PixmapBytePad(w, pDraw->depth); |
| 854 | length = widthBytesLine * h; |
| 855 | } |
| 856 | else { |
| 857 | widthBytesLine = PixmapBytePad(w, 1); |
| 858 | lenPer = widthBytesLine * h; |
| 859 | plane = ((Mask) 1) << (pDraw->depth - 1); |
| 860 | length = lenPer * Ones(planemask & (plane | (plane - 1))); |
| 861 | } |
| 862 | |
| 863 | VERIFY_SHMSIZE(shmdesc, stuff->offset, length, client); |
| 864 | xgi.size = length; |
| 865 | |
| 866 | if (length == 0) { /* nothing to do */ |
| 867 | } |
| 868 | else if (format == ZPixmap) { |
| 869 | XineramaGetImageData(drawables, x, y, w, h, format, planemask, |
| 870 | shmdesc->addr + stuff->offset, |
| 871 | widthBytesLine, isRoot); |
| 872 | } |
| 873 | else { |
| 874 | |
| 875 | length = stuff->offset; |
| 876 | for (; plane; plane >>= 1) { |
| 877 | if (planemask & plane) { |
| 878 | XineramaGetImageData(drawables, x, y, w, h, |
| 879 | format, plane, shmdesc->addr + length, |
| 880 | widthBytesLine, isRoot); |
| 881 | length += lenPer; |
| 882 | } |
| 883 | } |
| 884 | } |
| 885 | free(drawables); |
| 886 | |
| 887 | if (client->swapped) { |
| 888 | swaps(&xgi.sequenceNumber); |
| 889 | swapl(&xgi.length); |
| 890 | swapl(&xgi.visual); |
| 891 | swapl(&xgi.size); |
| 892 | } |
| 893 | WriteToClient(client, sizeof(xShmGetImageReply), &xgi); |
| 894 | |
| 895 | return Success; |
| 896 | } |
| 897 | |
| 898 | static int |
| 899 | ProcPanoramiXShmCreatePixmap(ClientPtr client) |
| 900 | { |
| 901 | ScreenPtr pScreen = NULL; |
| 902 | PixmapPtr pMap = NULL; |
| 903 | DrawablePtr pDraw; |
| 904 | DepthPtr pDepth; |
| 905 | int i, j, result, rc; |
| 906 | ShmDescPtr shmdesc; |
| 907 | |
| 908 | REQUEST(xShmCreatePixmapReq); |
| 909 | unsigned int width, height, depth; |
| 910 | unsigned long size; |
| 911 | PanoramiXRes *newPix; |
| 912 | |
| 913 | REQUEST_SIZE_MATCH(xShmCreatePixmapReq); |
| 914 | client->errorValue = stuff->pid; |
| 915 | if (!sharedPixmaps) |
| 916 | return BadImplementation; |
| 917 | LEGAL_NEW_RESOURCE(stuff->pid, client); |
| 918 | rc = dixLookupDrawable(&pDraw, stuff->drawable, client, M_ANY, |
| 919 | DixGetAttrAccess); |
| 920 | if (rc != Success) |
| 921 | return rc; |
| 922 | |
| 923 | VERIFY_SHMPTR(stuff->shmseg, stuff->offset, TRUE, shmdesc, client); |
| 924 | |
| 925 | width = stuff->width; |
| 926 | height = stuff->height; |
| 927 | depth = stuff->depth; |
| 928 | if (!width || !height || !depth) { |
| 929 | client->errorValue = 0; |
| 930 | return BadValue; |
| 931 | } |
| 932 | if (width > 32767 || height > 32767) |
| 933 | return BadAlloc; |
| 934 | |
| 935 | if (stuff->depth != 1) { |
| 936 | pDepth = pDraw->pScreen->allowedDepths; |
| 937 | for (i = 0; i < pDraw->pScreen->numDepths; i++, pDepth++) |
| 938 | if (pDepth->depth == stuff->depth) |
| 939 | goto CreatePmap; |
| 940 | client->errorValue = stuff->depth; |
| 941 | return BadValue; |
| 942 | } |
| 943 | |
| 944 | CreatePmap: |
| 945 | size = PixmapBytePad(width, depth) * height; |
| 946 | if (sizeof(size) == 4 && BitsPerPixel(depth) > 8) { |
| 947 | if (size < width * height) |
| 948 | return BadAlloc; |
| 949 | } |
| 950 | /* thankfully, offset is unsigned */ |
| 951 | if (stuff->offset + size < size) |
| 952 | return BadAlloc; |
| 953 | |
| 954 | VERIFY_SHMSIZE(shmdesc, stuff->offset, size, client); |
| 955 | |
| 956 | if (!(newPix = malloc(sizeof(PanoramiXRes)))) |
| 957 | return BadAlloc; |
| 958 | |
| 959 | newPix->type = XRT_PIXMAP; |
| 960 | newPix->u.pix.shared = TRUE; |
| 961 | panoramix_setup_ids(newPix, client, stuff->pid); |
| 962 | |
| 963 | result = Success; |
| 964 | |
| 965 | FOR_NSCREENS(j) { |
| 966 | ShmScrPrivateRec *screen_priv; |
| 967 | |
| 968 | pScreen = screenInfo.screens[j]; |
| 969 | |
| 970 | screen_priv = ShmGetScreenPriv(pScreen); |
| 971 | pMap = (*screen_priv->shmFuncs->CreatePixmap) (pScreen, |
| 972 | stuff->width, |
| 973 | stuff->height, |
| 974 | stuff->depth, |
| 975 | shmdesc->addr + |
| 976 | stuff->offset); |
| 977 | |
| 978 | if (pMap) { |
| 979 | dixSetPrivate(&pMap->devPrivates, shmPixmapPrivateKey, shmdesc); |
| 980 | shmdesc->refcnt++; |
| 981 | pMap->drawable.serialNumber = NEXT_SERIAL_NUMBER; |
| 982 | pMap->drawable.id = newPix->info[j].id; |
| 983 | if (!AddResource(newPix->info[j].id, RT_PIXMAP, (pointer) pMap)) { |
| 984 | result = BadAlloc; |
| 985 | break; |
| 986 | } |
| 987 | } |
| 988 | else { |
| 989 | result = BadAlloc; |
| 990 | break; |
| 991 | } |
| 992 | } |
| 993 | |
| 994 | if (result == BadAlloc) { |
| 995 | while (j--) |
| 996 | FreeResource(newPix->info[j].id, RT_NONE); |
| 997 | free(newPix); |
| 998 | } |
| 999 | else |
| 1000 | AddResource(stuff->pid, XRT_PIXMAP, newPix); |
| 1001 | |
| 1002 | return result; |
| 1003 | } |
| 1004 | #endif |
| 1005 | |
| 1006 | static PixmapPtr |
| 1007 | fbShmCreatePixmap(ScreenPtr pScreen, |
| 1008 | int width, int height, int depth, char *addr) |
| 1009 | { |
| 1010 | PixmapPtr pPixmap; |
| 1011 | |
| 1012 | pPixmap = (*pScreen->CreatePixmap) (pScreen, 0, 0, pScreen->rootDepth, 0); |
| 1013 | if (!pPixmap) |
| 1014 | return NullPixmap; |
| 1015 | |
| 1016 | if (!(*pScreen->ModifyPixmapHeader) (pPixmap, width, height, depth, |
| 1017 | BitsPerPixel(depth), |
| 1018 | PixmapBytePad(width, depth), |
| 1019 | (pointer) addr)) { |
| 1020 | (*pScreen->DestroyPixmap) (pPixmap); |
| 1021 | return NullPixmap; |
| 1022 | } |
| 1023 | return pPixmap; |
| 1024 | } |
| 1025 | |
| 1026 | static int |
| 1027 | ProcShmCreatePixmap(ClientPtr client) |
| 1028 | { |
| 1029 | PixmapPtr pMap; |
| 1030 | DrawablePtr pDraw; |
| 1031 | DepthPtr pDepth; |
| 1032 | int i, rc; |
| 1033 | ShmDescPtr shmdesc; |
| 1034 | ShmScrPrivateRec *screen_priv; |
| 1035 | |
| 1036 | REQUEST(xShmCreatePixmapReq); |
| 1037 | unsigned int width, height, depth; |
| 1038 | unsigned long size; |
| 1039 | |
| 1040 | REQUEST_SIZE_MATCH(xShmCreatePixmapReq); |
| 1041 | client->errorValue = stuff->pid; |
| 1042 | if (!sharedPixmaps) |
| 1043 | return BadImplementation; |
| 1044 | LEGAL_NEW_RESOURCE(stuff->pid, client); |
| 1045 | rc = dixLookupDrawable(&pDraw, stuff->drawable, client, M_ANY, |
| 1046 | DixGetAttrAccess); |
| 1047 | if (rc != Success) |
| 1048 | return rc; |
| 1049 | |
| 1050 | VERIFY_SHMPTR(stuff->shmseg, stuff->offset, TRUE, shmdesc, client); |
| 1051 | |
| 1052 | width = stuff->width; |
| 1053 | height = stuff->height; |
| 1054 | depth = stuff->depth; |
| 1055 | if (!width || !height || !depth) { |
| 1056 | client->errorValue = 0; |
| 1057 | return BadValue; |
| 1058 | } |
| 1059 | if (width > 32767 || height > 32767) |
| 1060 | return BadAlloc; |
| 1061 | |
| 1062 | if (stuff->depth != 1) { |
| 1063 | pDepth = pDraw->pScreen->allowedDepths; |
| 1064 | for (i = 0; i < pDraw->pScreen->numDepths; i++, pDepth++) |
| 1065 | if (pDepth->depth == stuff->depth) |
| 1066 | goto CreatePmap; |
| 1067 | client->errorValue = stuff->depth; |
| 1068 | return BadValue; |
| 1069 | } |
| 1070 | |
| 1071 | CreatePmap: |
| 1072 | size = PixmapBytePad(width, depth) * height; |
| 1073 | if (sizeof(size) == 4 && BitsPerPixel(depth) > 8) { |
| 1074 | if (size < width * height) |
| 1075 | return BadAlloc; |
| 1076 | } |
| 1077 | /* thankfully, offset is unsigned */ |
| 1078 | if (stuff->offset + size < size) |
| 1079 | return BadAlloc; |
| 1080 | |
| 1081 | VERIFY_SHMSIZE(shmdesc, stuff->offset, size, client); |
| 1082 | screen_priv = ShmGetScreenPriv(pDraw->pScreen); |
| 1083 | pMap = (*screen_priv->shmFuncs->CreatePixmap) (pDraw->pScreen, stuff->width, |
| 1084 | stuff->height, stuff->depth, |
| 1085 | shmdesc->addr + |
| 1086 | stuff->offset); |
| 1087 | if (pMap) { |
| 1088 | rc = XaceHook(XACE_RESOURCE_ACCESS, client, stuff->pid, RT_PIXMAP, |
| 1089 | pMap, RT_NONE, NULL, DixCreateAccess); |
| 1090 | if (rc != Success) { |
| 1091 | pDraw->pScreen->DestroyPixmap(pMap); |
| 1092 | return rc; |
| 1093 | } |
| 1094 | dixSetPrivate(&pMap->devPrivates, shmPixmapPrivateKey, shmdesc); |
| 1095 | shmdesc->refcnt++; |
| 1096 | pMap->drawable.serialNumber = NEXT_SERIAL_NUMBER; |
| 1097 | pMap->drawable.id = stuff->pid; |
| 1098 | if (AddResource(stuff->pid, RT_PIXMAP, (pointer) pMap)) { |
| 1099 | return Success; |
| 1100 | } |
| 1101 | } |
| 1102 | return BadAlloc; |
| 1103 | } |
| 1104 | |
| 1105 | #ifdef SHM_FD_PASSING |
| 1106 | |
| 1107 | static void |
| 1108 | ShmBusfaultNotify(void *context) |
| 1109 | { |
| 1110 | ShmDescPtr shmdesc = context; |
| 1111 | |
| 1112 | ErrorF("shared memory 0x%x truncated by client\n", |
| 1113 | (unsigned int) shmdesc->resource); |
| 1114 | busfault_unregister(shmdesc->busfault); |
| 1115 | shmdesc->busfault = NULL; |
| 1116 | FreeResource (shmdesc->resource, RT_NONE); |
| 1117 | } |
| 1118 | |
| 1119 | static int |
| 1120 | ProcShmAttachFd(ClientPtr client) |
| 1121 | { |
| 1122 | int fd; |
| 1123 | ShmDescPtr shmdesc; |
| 1124 | REQUEST(xShmAttachFdReq); |
| 1125 | struct stat statb; |
| 1126 | |
| 1127 | SetReqFds(client, 1); |
| 1128 | REQUEST_SIZE_MATCH(xShmAttachFdReq); |
| 1129 | LEGAL_NEW_RESOURCE(stuff->shmseg, client); |
| 1130 | if ((stuff->readOnly != xTrue) && (stuff->readOnly != xFalse)) { |
| 1131 | client->errorValue = stuff->readOnly; |
| 1132 | return BadValue; |
| 1133 | } |
| 1134 | fd = ReadFdFromClient(client); |
| 1135 | if (fd < 0) |
| 1136 | return BadMatch; |
| 1137 | |
| 1138 | if (fstat(fd, &statb) < 0 || statb.st_size == 0) { |
| 1139 | close(fd); |
| 1140 | return BadMatch; |
| 1141 | } |
| 1142 | |
| 1143 | shmdesc = malloc(sizeof(ShmDescRec)); |
| 1144 | if (!shmdesc) { |
| 1145 | close(fd); |
| 1146 | return BadAlloc; |
| 1147 | } |
| 1148 | shmdesc->is_fd = TRUE; |
| 1149 | shmdesc->addr = mmap(NULL, statb.st_size, |
| 1150 | stuff->readOnly ? PROT_READ : PROT_READ|PROT_WRITE, |
| 1151 | MAP_SHARED, |
| 1152 | fd, 0); |
| 1153 | |
| 1154 | close(fd); |
| 1155 | if ((shmdesc->addr == ((char *) -1))) { |
| 1156 | free(shmdesc); |
| 1157 | return BadAccess; |
| 1158 | } |
| 1159 | |
| 1160 | shmdesc->refcnt = 1; |
| 1161 | shmdesc->writable = !stuff->readOnly; |
| 1162 | shmdesc->size = statb.st_size; |
| 1163 | shmdesc->resource = stuff->shmseg; |
| 1164 | |
| 1165 | shmdesc->busfault = busfault_register_mmap(shmdesc->addr, shmdesc->size, ShmBusfaultNotify, shmdesc); |
| 1166 | if (!shmdesc->busfault) { |
| 1167 | munmap(shmdesc->addr, shmdesc->size); |
| 1168 | free(shmdesc); |
| 1169 | return BadAlloc; |
| 1170 | } |
| 1171 | |
| 1172 | shmdesc->next = Shmsegs; |
| 1173 | Shmsegs = shmdesc; |
| 1174 | |
| 1175 | if (!AddResource(stuff->shmseg, ShmSegType, (pointer) shmdesc)) |
| 1176 | return BadAlloc; |
| 1177 | return Success; |
| 1178 | } |
| 1179 | |
| 1180 | static int |
| 1181 | shm_tmpfile(void) |
| 1182 | { |
| 1183 | #ifdef SHMDIR |
| 1184 | int fd; |
| 1185 | int flags; |
| 1186 | char template[] = SHMDIR "/shmfd-XXXXXX"; |
| 1187 | #ifdef O_TMPFILE |
| 1188 | fd = open(SHMDIR, O_TMPFILE|O_RDWR|O_CLOEXEC|O_EXCL, 0666); |
| 1189 | if (fd >= 0) { |
| 1190 | ErrorF ("Using O_TMPFILE\n"); |
| 1191 | return fd; |
| 1192 | } |
| 1193 | ErrorF ("Not using O_TMPFILE\n"); |
| 1194 | #endif |
| 1195 | fd = mkstemp(template); |
| 1196 | if (fd < 0) |
| 1197 | return -1; |
| 1198 | unlink(template); |
| 1199 | if (fcntl(fd, F_GETFD, &flags) >= 0) { |
| 1200 | flags |= FD_CLOEXEC; |
| 1201 | (void) fcntl(fd, F_SETFD, &flags); |
| 1202 | } |
| 1203 | return fd; |
| 1204 | #else |
| 1205 | return -1; |
| 1206 | #endif |
| 1207 | } |
| 1208 | |
| 1209 | static int |
| 1210 | ProcShmCreateSegment(ClientPtr client) |
| 1211 | { |
| 1212 | int fd; |
| 1213 | ShmDescPtr shmdesc; |
| 1214 | REQUEST(xShmCreateSegmentReq); |
| 1215 | xShmCreateSegmentReply rep = { |
| 1216 | .type = X_Reply, |
| 1217 | .nfd = 1, |
| 1218 | .sequenceNumber = client->sequence, |
| 1219 | .length = 0, |
| 1220 | }; |
| 1221 | |
| 1222 | REQUEST_SIZE_MATCH(xShmCreateSegmentReq); |
| 1223 | if ((stuff->readOnly != xTrue) && (stuff->readOnly != xFalse)) { |
| 1224 | client->errorValue = stuff->readOnly; |
| 1225 | return BadValue; |
| 1226 | } |
| 1227 | fd = shm_tmpfile(); |
| 1228 | if (fd < 0) |
| 1229 | return BadAlloc; |
| 1230 | if (ftruncate(fd, stuff->size) < 0) { |
| 1231 | close(fd); |
| 1232 | return BadAlloc; |
| 1233 | } |
| 1234 | shmdesc = malloc(sizeof(ShmDescRec)); |
| 1235 | if (!shmdesc) { |
| 1236 | close(fd); |
| 1237 | return BadAlloc; |
| 1238 | } |
| 1239 | shmdesc->is_fd = TRUE; |
| 1240 | shmdesc->addr = mmap(NULL, stuff->size, |
| 1241 | stuff->readOnly ? PROT_READ : PROT_READ|PROT_WRITE, |
| 1242 | MAP_SHARED, |
| 1243 | fd, 0); |
| 1244 | |
| 1245 | if ((shmdesc->addr == ((char *) -1))) { |
| 1246 | close(fd); |
| 1247 | free(shmdesc); |
| 1248 | return BadAccess; |
| 1249 | } |
| 1250 | |
| 1251 | shmdesc->refcnt = 1; |
| 1252 | shmdesc->writable = !stuff->readOnly; |
| 1253 | shmdesc->size = stuff->size; |
| 1254 | |
| 1255 | shmdesc->busfault = busfault_register_mmap(shmdesc->addr, shmdesc->size, ShmBusfaultNotify, shmdesc); |
| 1256 | if (!shmdesc->busfault) { |
| 1257 | close(fd); |
| 1258 | munmap(shmdesc->addr, shmdesc->size); |
| 1259 | free(shmdesc); |
| 1260 | return BadAlloc; |
| 1261 | } |
| 1262 | |
| 1263 | shmdesc->next = Shmsegs; |
| 1264 | Shmsegs = shmdesc; |
| 1265 | |
| 1266 | if (!AddResource(stuff->shmseg, ShmSegType, (pointer) shmdesc)) { |
| 1267 | close(fd); |
| 1268 | return BadAlloc; |
| 1269 | } |
| 1270 | |
| 1271 | if (WriteFdToClient(client, fd, TRUE) < 0) { |
| 1272 | FreeResource(stuff->shmseg, RT_NONE); |
| 1273 | close(fd); |
| 1274 | return BadAlloc; |
| 1275 | } |
| 1276 | WriteToClient(client, sizeof (xShmCreateSegmentReply), &rep); |
| 1277 | return Success; |
| 1278 | } |
| 1279 | #endif /* SHM_FD_PASSING */ |
| 1280 | |
| 1281 | static int |
| 1282 | ProcShmDispatch(ClientPtr client) |
| 1283 | { |
| 1284 | REQUEST(xReq); |
| 1285 | switch (stuff->data) { |
| 1286 | case X_ShmQueryVersion: |
| 1287 | return ProcShmQueryVersion(client); |
| 1288 | case X_ShmAttach: |
| 1289 | return ProcShmAttach(client); |
| 1290 | case X_ShmDetach: |
| 1291 | return ProcShmDetach(client); |
| 1292 | case X_ShmPutImage: |
| 1293 | #ifdef PANORAMIX |
| 1294 | if (!noPanoramiXExtension) |
| 1295 | return ProcPanoramiXShmPutImage(client); |
| 1296 | #endif |
| 1297 | return ProcShmPutImage(client); |
| 1298 | case X_ShmGetImage: |
| 1299 | #ifdef PANORAMIX |
| 1300 | if (!noPanoramiXExtension) |
| 1301 | return ProcPanoramiXShmGetImage(client); |
| 1302 | #endif |
| 1303 | return ProcShmGetImage(client); |
| 1304 | case X_ShmCreatePixmap: |
| 1305 | #ifdef PANORAMIX |
| 1306 | if (!noPanoramiXExtension) |
| 1307 | return ProcPanoramiXShmCreatePixmap(client); |
| 1308 | #endif |
| 1309 | return ProcShmCreatePixmap(client); |
| 1310 | #ifdef SHM_FD_PASSING |
| 1311 | case X_ShmAttachFd: |
| 1312 | return ProcShmAttachFd(client); |
| 1313 | case X_ShmCreateSegment: |
| 1314 | return ProcShmCreateSegment(client); |
| 1315 | #endif |
| 1316 | default: |
| 1317 | return BadRequest; |
| 1318 | } |
| 1319 | } |
| 1320 | |
| 1321 | static void |
| 1322 | SShmCompletionEvent(xShmCompletionEvent * from, xShmCompletionEvent * to) |
| 1323 | { |
| 1324 | to->type = from->type; |
| 1325 | cpswaps(from->sequenceNumber, to->sequenceNumber); |
| 1326 | cpswapl(from->drawable, to->drawable); |
| 1327 | cpswaps(from->minorEvent, to->minorEvent); |
| 1328 | to->majorEvent = from->majorEvent; |
| 1329 | cpswapl(from->shmseg, to->shmseg); |
| 1330 | cpswapl(from->offset, to->offset); |
| 1331 | } |
| 1332 | |
| 1333 | static int |
| 1334 | SProcShmQueryVersion(ClientPtr client) |
| 1335 | { |
| 1336 | REQUEST(xShmQueryVersionReq); |
| 1337 | |
| 1338 | swaps(&stuff->length); |
| 1339 | return ProcShmQueryVersion(client); |
| 1340 | } |
| 1341 | |
| 1342 | static int |
| 1343 | SProcShmAttach(ClientPtr client) |
| 1344 | { |
| 1345 | REQUEST(xShmAttachReq); |
| 1346 | swaps(&stuff->length); |
| 1347 | REQUEST_SIZE_MATCH(xShmAttachReq); |
| 1348 | swapl(&stuff->shmseg); |
| 1349 | swapl(&stuff->shmid); |
| 1350 | return ProcShmAttach(client); |
| 1351 | } |
| 1352 | |
| 1353 | static int |
| 1354 | SProcShmDetach(ClientPtr client) |
| 1355 | { |
| 1356 | REQUEST(xShmDetachReq); |
| 1357 | swaps(&stuff->length); |
| 1358 | REQUEST_SIZE_MATCH(xShmDetachReq); |
| 1359 | swapl(&stuff->shmseg); |
| 1360 | return ProcShmDetach(client); |
| 1361 | } |
| 1362 | |
| 1363 | static int |
| 1364 | SProcShmPutImage(ClientPtr client) |
| 1365 | { |
| 1366 | REQUEST(xShmPutImageReq); |
| 1367 | swaps(&stuff->length); |
| 1368 | REQUEST_SIZE_MATCH(xShmPutImageReq); |
| 1369 | swapl(&stuff->drawable); |
| 1370 | swapl(&stuff->gc); |
| 1371 | swaps(&stuff->totalWidth); |
| 1372 | swaps(&stuff->totalHeight); |
| 1373 | swaps(&stuff->srcX); |
| 1374 | swaps(&stuff->srcY); |
| 1375 | swaps(&stuff->srcWidth); |
| 1376 | swaps(&stuff->srcHeight); |
| 1377 | swaps(&stuff->dstX); |
| 1378 | swaps(&stuff->dstY); |
| 1379 | swapl(&stuff->shmseg); |
| 1380 | swapl(&stuff->offset); |
| 1381 | return ProcShmPutImage(client); |
| 1382 | } |
| 1383 | |
| 1384 | static int |
| 1385 | SProcShmGetImage(ClientPtr client) |
| 1386 | { |
| 1387 | REQUEST(xShmGetImageReq); |
| 1388 | swaps(&stuff->length); |
| 1389 | REQUEST_SIZE_MATCH(xShmGetImageReq); |
| 1390 | swapl(&stuff->drawable); |
| 1391 | swaps(&stuff->x); |
| 1392 | swaps(&stuff->y); |
| 1393 | swaps(&stuff->width); |
| 1394 | swaps(&stuff->height); |
| 1395 | swapl(&stuff->planeMask); |
| 1396 | swapl(&stuff->shmseg); |
| 1397 | swapl(&stuff->offset); |
| 1398 | return ProcShmGetImage(client); |
| 1399 | } |
| 1400 | |
| 1401 | static int |
| 1402 | SProcShmCreatePixmap(ClientPtr client) |
| 1403 | { |
| 1404 | REQUEST(xShmCreatePixmapReq); |
| 1405 | swaps(&stuff->length); |
| 1406 | REQUEST_SIZE_MATCH(xShmCreatePixmapReq); |
| 1407 | swapl(&stuff->pid); |
| 1408 | swapl(&stuff->drawable); |
| 1409 | swaps(&stuff->width); |
| 1410 | swaps(&stuff->height); |
| 1411 | swapl(&stuff->shmseg); |
| 1412 | swapl(&stuff->offset); |
| 1413 | return ProcShmCreatePixmap(client); |
| 1414 | } |
| 1415 | |
| 1416 | #ifdef SHM_FD_PASSING |
| 1417 | static int |
| 1418 | SProcShmAttachFd(ClientPtr client) |
| 1419 | { |
| 1420 | REQUEST(xShmAttachFdReq); |
| 1421 | SetReqFds(client, 1); |
| 1422 | swaps(&stuff->length); |
| 1423 | REQUEST_SIZE_MATCH(xShmAttachFdReq); |
| 1424 | swapl(&stuff->shmseg); |
| 1425 | return ProcShmAttachFd(client); |
| 1426 | } |
| 1427 | |
| 1428 | static int |
| 1429 | SProcShmCreateSegment(ClientPtr client) |
| 1430 | { |
| 1431 | REQUEST(xShmCreateSegmentReq); |
| 1432 | swaps(&stuff->length); |
| 1433 | REQUEST_SIZE_MATCH(xShmCreateSegmentReq); |
| 1434 | swapl(&stuff->shmseg); |
| 1435 | swapl(&stuff->size); |
| 1436 | return ProcShmCreateSegment(client); |
| 1437 | } |
| 1438 | #endif /* SHM_FD_PASSING */ |
| 1439 | |
| 1440 | static int |
| 1441 | SProcShmDispatch(ClientPtr client) |
| 1442 | { |
| 1443 | REQUEST(xReq); |
| 1444 | switch (stuff->data) { |
| 1445 | case X_ShmQueryVersion: |
| 1446 | return SProcShmQueryVersion(client); |
| 1447 | case X_ShmAttach: |
| 1448 | return SProcShmAttach(client); |
| 1449 | case X_ShmDetach: |
| 1450 | return SProcShmDetach(client); |
| 1451 | case X_ShmPutImage: |
| 1452 | return SProcShmPutImage(client); |
| 1453 | case X_ShmGetImage: |
| 1454 | return SProcShmGetImage(client); |
| 1455 | case X_ShmCreatePixmap: |
| 1456 | return SProcShmCreatePixmap(client); |
| 1457 | #ifdef SHM_FD_PASSING |
| 1458 | case X_ShmAttachFd: |
| 1459 | return SProcShmAttachFd(client); |
| 1460 | case X_ShmCreateSegment: |
| 1461 | return SProcShmCreateSegment(client); |
| 1462 | #endif |
| 1463 | default: |
| 1464 | return BadRequest; |
| 1465 | } |
| 1466 | } |
| 1467 | |
| 1468 | void |
| 1469 | ShmExtensionInit(void) |
| 1470 | { |
| 1471 | ExtensionEntry *extEntry; |
| 1472 | int i; |
| 1473 | |
| 1474 | #ifdef MUST_CHECK_FOR_SHM_SYSCALL |
| 1475 | if (!CheckForShmSyscall()) { |
| 1476 | ErrorF("MIT-SHM extension disabled due to lack of kernel support\n"); |
| 1477 | return; |
| 1478 | } |
| 1479 | #endif |
| 1480 | |
| 1481 | if (!ShmRegisterPrivates()) |
| 1482 | return; |
| 1483 | |
| 1484 | sharedPixmaps = xFalse; |
| 1485 | { |
| 1486 | sharedPixmaps = xTrue; |
| 1487 | for (i = 0; i < screenInfo.numScreens; i++) { |
| 1488 | ShmScrPrivateRec *screen_priv = |
| 1489 | ShmInitScreenPriv(screenInfo.screens[i]); |
| 1490 | if (!screen_priv->shmFuncs) |
| 1491 | screen_priv->shmFuncs = &miFuncs; |
| 1492 | if (!screen_priv->shmFuncs->CreatePixmap) |
| 1493 | sharedPixmaps = xFalse; |
| 1494 | } |
| 1495 | if (sharedPixmaps) |
| 1496 | for (i = 0; i < screenInfo.numScreens; i++) { |
| 1497 | ShmScrPrivateRec *screen_priv = |
| 1498 | ShmGetScreenPriv(screenInfo.screens[i]); |
| 1499 | screen_priv->destroyPixmap = |
| 1500 | screenInfo.screens[i]->DestroyPixmap; |
| 1501 | screenInfo.screens[i]->DestroyPixmap = ShmDestroyPixmap; |
| 1502 | } |
| 1503 | } |
| 1504 | ShmSegType = CreateNewResourceType(ShmDetachSegment, "ShmSeg"); |
| 1505 | if (ShmSegType && |
| 1506 | (extEntry = AddExtension(SHMNAME, ShmNumberEvents, ShmNumberErrors, |
| 1507 | ProcShmDispatch, SProcShmDispatch, |
| 1508 | ShmResetProc, StandardMinorOpcode))) { |
| 1509 | ShmReqCode = (unsigned char) extEntry->base; |
| 1510 | ShmCompletionCode = extEntry->eventBase; |
| 1511 | BadShmSegCode = extEntry->errorBase; |
| 1512 | SetResourceTypeErrorValue(ShmSegType, BadShmSegCode); |
| 1513 | EventSwapVector[ShmCompletionCode] = (EventSwapPtr) SShmCompletionEvent; |
| 1514 | } |
| 1515 | } |