1557 lines
45 KiB
C
1557 lines
45 KiB
C
/************************************************************
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Copyright 1989, 1998 The Open Group
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Permission to use, copy, modify, distribute, and sell this software and its
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documentation for any purpose is hereby granted without fee, provided that
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the above copyright notice appear in all copies and that both that
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copyright notice and this permission notice appear in supporting
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documentation.
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
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AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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Except as contained in this notice, the name of The Open Group shall not be
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used in advertising or otherwise to promote the sale, use or other dealings
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in this Software without prior written authorization from The Open Group.
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********************************************************/
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/* THIS IS NOT AN X CONSORTIUM STANDARD OR AN X PROJECT TEAM SPECIFICATION */
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#define SHM
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#include <dix-config.h>
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#include <sys/types.h>
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#include <sys/ipc.h>
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#include <sys/shm.h>
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#include <sys/mman.h>
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#include <unistd.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <X11/X.h>
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#include <X11/Xproto.h>
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#include <X11/extensions/shmproto.h>
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#include <X11/Xfuncproto.h>
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#include "dix/dix_priv.h"
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#include "dix/screen_hooks_priv.h"
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#include "miext/extinit_priv.h"
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#include "os/auth.h"
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#include "os/busfault.h"
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#include "os/client_priv.h"
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#include "os/log_priv.h"
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#include "os/osdep.h"
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#include "Xext/panoramiX.h"
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#include "Xext/panoramiXsrv.h"
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#include "misc.h"
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#include "os.h"
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#include "dixstruct_priv.h"
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#include "resource.h"
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#include "scrnintstr.h"
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#include "windowstr.h"
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#include "pixmapstr.h"
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#include "gcstruct.h"
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#include "extnsionst.h"
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#include "servermd.h"
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#include "shmint.h"
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#include "xace.h"
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#include "protocol-versions.h"
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/* Needed for Solaris cross-zone shared memory extension */
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#ifdef HAVE_SHMCTL64
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#include <sys/ipc_impl.h>
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#define SHMSTAT(id, buf) shmctl64(id, IPC_STAT64, buf)
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#define SHMSTAT_TYPE struct shmid_ds64
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#define SHMPERM_TYPE struct ipc_perm64
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#define SHM_PERM(buf) buf.shmx_perm
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#define SHM_SEGSZ(buf) buf.shmx_segsz
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#define SHMPERM_UID(p) p->ipcx_uid
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#define SHMPERM_CUID(p) p->ipcx_cuid
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#define SHMPERM_GID(p) p->ipcx_gid
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#define SHMPERM_CGID(p) p->ipcx_cgid
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#define SHMPERM_MODE(p) p->ipcx_mode
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#define SHMPERM_ZONEID(p) p->ipcx_zoneid
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#else
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#define SHMSTAT(id, buf) shmctl(id, IPC_STAT, buf)
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#define SHMSTAT_TYPE struct shmid_ds
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#define SHMPERM_TYPE struct ipc_perm
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#define SHM_PERM(buf) buf.shm_perm
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#define SHM_SEGSZ(buf) buf.shm_segsz
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#define SHMPERM_UID(p) p->uid
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#define SHMPERM_CUID(p) p->cuid
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#define SHMPERM_GID(p) p->gid
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#define SHMPERM_CGID(p) p->cgid
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#define SHMPERM_MODE(p) p->mode
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#endif
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typedef struct _ShmScrPrivateRec {
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ShmFuncsPtr shmFuncs;
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} ShmScrPrivateRec;
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Bool noMITShmExtension = FALSE;
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static PixmapPtr fbShmCreatePixmap(XSHM_CREATE_PIXMAP_ARGS);
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static int ShmDetachSegment(void *value, XID shmseg);
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static void ShmResetProc(ExtensionEntry *extEntry);
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static void SShmCompletionEvent(xShmCompletionEvent *from,
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xShmCompletionEvent *to);
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static int ShmCreatePixmap(ClientPtr client, xShmCreatePixmapReq *stuff);
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static unsigned char ShmReqCode;
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int ShmCompletionCode;
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int BadShmSegCode;
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RESTYPE ShmSegType;
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static ShmDescPtr Shmsegs;
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static Bool sharedPixmaps;
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static DevPrivateKeyRec shmScrPrivateKeyRec;
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#define shmScrPrivateKey (&shmScrPrivateKeyRec)
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static DevPrivateKeyRec shmPixmapPrivateKeyRec;
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#define shmPixmapPrivateKey (&shmPixmapPrivateKeyRec)
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static ShmFuncs miFuncs = { NULL, NULL };
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static ShmFuncs fbFuncs = { fbShmCreatePixmap, NULL };
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#define ShmGetScreenPriv(s) ((ShmScrPrivateRec *)dixLookupPrivate(&(s)->devPrivates, shmScrPrivateKey))
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#define VERIFY_SHMSEG(shmseg,shmdesc,client) \
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{ \
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int tmprc; \
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tmprc = dixLookupResourceByType((void **)&(shmdesc), shmseg, ShmSegType, \
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client, DixReadAccess); \
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if (tmprc != Success) \
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return tmprc; \
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}
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#define VERIFY_SHMPTR(shmseg,offset,needwrite,shmdesc,client) \
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{ \
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VERIFY_SHMSEG(shmseg, shmdesc, client); \
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if ((offset & 3) || (offset > shmdesc->size)) \
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{ \
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client->errorValue = offset; \
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return BadValue; \
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} \
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if (needwrite && !shmdesc->writable) \
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return BadAccess; \
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}
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#define VERIFY_SHMSIZE(shmdesc,offset,len,client) \
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{ \
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if ((offset + len) > shmdesc->size) \
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{ \
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return BadAccess; \
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} \
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}
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#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__)
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static Bool badSysCall = FALSE;
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static void
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SigSysHandler(int signo)
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{
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badSysCall = TRUE;
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}
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static Bool
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CheckForShmSyscall(void)
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{
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void (*oldHandler) (int);
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int shmid = -1;
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/* If no SHM support in the kernel, the bad syscall will generate SIGSYS */
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oldHandler = OsSignal(SIGSYS, SigSysHandler);
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badSysCall = FALSE;
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shmid = shmget(IPC_PRIVATE, 4096, IPC_CREAT);
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if (shmid != -1) {
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/* Successful allocation - clean up */
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shmctl(shmid, IPC_RMID, NULL);
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}
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else {
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/* Allocation failed */
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badSysCall = TRUE;
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}
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OsSignal(SIGSYS, oldHandler);
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return !badSysCall;
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}
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#define MUST_CHECK_FOR_SHM_SYSCALL
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#endif
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static void
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ShmScreenClose(CallbackListPtr *pcbl, ScreenPtr pScreen, void *unused)
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{
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ShmScrPrivateRec *screen_priv = ShmGetScreenPriv(pScreen);
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dixSetPrivate(&pScreen->devPrivates, shmScrPrivateKey, NULL);
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free(screen_priv);
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}
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static ShmScrPrivateRec *
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ShmInitScreenPriv(ScreenPtr pScreen)
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{
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ShmScrPrivateRec *screen_priv = ShmGetScreenPriv(pScreen);
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if (!screen_priv) {
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screen_priv = calloc(1, sizeof(ShmScrPrivateRec));
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dixSetPrivate(&pScreen->devPrivates, shmScrPrivateKey, screen_priv);
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dixScreenHookClose(pScreen, ShmScreenClose);
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}
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return screen_priv;
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}
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static Bool
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ShmRegisterPrivates(void)
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{
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if (!dixRegisterPrivateKey(&shmScrPrivateKeyRec, PRIVATE_SCREEN, 0))
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return FALSE;
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if (!dixRegisterPrivateKey(&shmPixmapPrivateKeyRec, PRIVATE_PIXMAP, 0))
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return FALSE;
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return TRUE;
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}
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/*ARGSUSED*/ static void
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ShmResetProc(ExtensionEntry * extEntry)
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{
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int i;
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for (i = 0; i < screenInfo.numScreens; i++)
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ShmRegisterFuncs(screenInfo.screens[i], NULL);
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}
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void
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ShmRegisterFuncs(ScreenPtr pScreen, ShmFuncsPtr funcs)
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{
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if (!ShmRegisterPrivates())
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return;
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ShmInitScreenPriv(pScreen)->shmFuncs = funcs;
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}
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void
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ShmRegisterFbFuncs(ScreenPtr pScreen)
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{
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ShmRegisterFuncs(pScreen, &fbFuncs);
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}
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static int
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ProcShmQueryVersion(ClientPtr client)
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{
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xShmQueryVersionReply rep = {
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.type = X_Reply,
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.sharedPixmaps = sharedPixmaps,
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.sequenceNumber = client->sequence,
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.length = 0,
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.majorVersion = SERVER_SHM_MAJOR_VERSION,
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.minorVersion = SERVER_SHM_MINOR_VERSION,
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.uid = geteuid(),
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.gid = getegid(),
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.pixmapFormat = sharedPixmaps ? ZPixmap : 0
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};
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REQUEST_SIZE_MATCH(xShmQueryVersionReq);
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if (client->swapped) {
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swaps(&rep.sequenceNumber);
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swapl(&rep.length);
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swaps(&rep.majorVersion);
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swaps(&rep.minorVersion);
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swaps(&rep.uid);
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swaps(&rep.gid);
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}
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WriteToClient(client, sizeof(xShmQueryVersionReply), &rep);
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return Success;
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}
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/*
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* Simulate the access() system call for a shared memory segment,
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* using the credentials from the client if available.
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*/
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static int
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shm_access(ClientPtr client, SHMPERM_TYPE * perm, int readonly)
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{
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int uid, gid;
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mode_t mask;
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int uidset = 0, gidset = 0;
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LocalClientCredRec *lcc;
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if (GetLocalClientCreds(client, &lcc) != -1) {
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if (lcc->fieldsSet & LCC_UID_SET) {
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uid = lcc->euid;
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uidset = 1;
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}
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if (lcc->fieldsSet & LCC_GID_SET) {
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gid = lcc->egid;
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gidset = 1;
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}
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#if defined(HAVE_GETZONEID) && defined(SHMPERM_ZONEID)
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if (((lcc->fieldsSet & LCC_ZID_SET) == 0) || (lcc->zoneid == -1)
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|| (lcc->zoneid != SHMPERM_ZONEID(perm))) {
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uidset = 0;
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gidset = 0;
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}
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#endif
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FreeLocalClientCreds(lcc);
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if (uidset) {
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/* User id 0 always gets access */
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if (uid == 0) {
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return 0;
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}
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/* Check the owner */
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if (SHMPERM_UID(perm) == uid || SHMPERM_CUID(perm) == uid) {
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mask = S_IRUSR;
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if (!readonly) {
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mask |= S_IWUSR;
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}
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return (SHMPERM_MODE(perm) & mask) == mask ? 0 : -1;
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}
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}
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if (gidset) {
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/* Check the group */
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if (SHMPERM_GID(perm) == gid || SHMPERM_CGID(perm) == gid) {
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mask = S_IRGRP;
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if (!readonly) {
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mask |= S_IWGRP;
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}
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return (SHMPERM_MODE(perm) & mask) == mask ? 0 : -1;
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}
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}
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}
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/* Otherwise, check everyone else */
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mask = S_IROTH;
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if (!readonly) {
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mask |= S_IWOTH;
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}
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return (SHMPERM_MODE(perm) & mask) == mask ? 0 : -1;
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}
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static int
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ProcShmAttach(ClientPtr client)
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{
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REQUEST(xShmAttachReq);
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REQUEST_SIZE_MATCH(xShmAttachReq);
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if (!client->local)
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return BadRequest;
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SHMSTAT_TYPE buf;
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ShmDescPtr shmdesc;
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LEGAL_NEW_RESOURCE(stuff->shmseg, client);
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if ((stuff->readOnly != xTrue) && (stuff->readOnly != xFalse)) {
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client->errorValue = stuff->readOnly;
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return BadValue;
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}
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for (shmdesc = Shmsegs; shmdesc; shmdesc = shmdesc->next) {
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if (!SHMDESC_IS_FD(shmdesc) && shmdesc->shmid == stuff->shmid)
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break;
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}
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if (shmdesc) {
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if (!stuff->readOnly && !shmdesc->writable)
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return BadAccess;
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shmdesc->refcnt++;
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}
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else {
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shmdesc = calloc(1, sizeof(ShmDescRec));
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if (!shmdesc)
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return BadAlloc;
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#ifdef SHM_FD_PASSING
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shmdesc->is_fd = FALSE;
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#endif
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shmdesc->addr = shmat(stuff->shmid, 0,
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stuff->readOnly ? SHM_RDONLY : 0);
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if ((shmdesc->addr == ((char *) -1)) || SHMSTAT(stuff->shmid, &buf)) {
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free(shmdesc);
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return BadAccess;
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}
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/* The attach was performed with root privs. We must
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* do manual checking of access rights for the credentials
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* of the client */
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if (shm_access(client, &(SHM_PERM(buf)), stuff->readOnly) == -1) {
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shmdt(shmdesc->addr);
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free(shmdesc);
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return BadAccess;
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}
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shmdesc->shmid = stuff->shmid;
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shmdesc->refcnt = 1;
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shmdesc->writable = !stuff->readOnly;
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shmdesc->size = SHM_SEGSZ(buf);
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shmdesc->next = Shmsegs;
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Shmsegs = shmdesc;
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}
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if (!AddResource(stuff->shmseg, ShmSegType, (void *) shmdesc))
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return BadAlloc;
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return Success;
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}
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/*ARGSUSED*/ static int
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ShmDetachSegment(void *value, /* must conform to DeleteType */
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XID unused)
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{
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ShmDescPtr shmdesc = (ShmDescPtr) value;
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ShmDescPtr *prev;
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if (!shmdesc)
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return Success;
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if (--shmdesc->refcnt)
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return TRUE;
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#if SHM_FD_PASSING
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if (shmdesc->is_fd) {
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if (shmdesc->busfault)
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busfault_unregister(shmdesc->busfault);
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munmap(shmdesc->addr, shmdesc->size);
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} else
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#endif
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shmdt(shmdesc->addr);
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for (prev = &Shmsegs; *prev != shmdesc; prev = &(*prev)->next);
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*prev = shmdesc->next;
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free(shmdesc);
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return Success;
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}
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static int
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ProcShmDetach(ClientPtr client)
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{
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REQUEST(xShmDetachReq);
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REQUEST_SIZE_MATCH(xShmDetachReq);
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if (!client->local)
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return BadRequest;
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ShmDescPtr shmdesc;
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VERIFY_SHMSEG(stuff->shmseg, shmdesc, client);
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FreeResource(stuff->shmseg, X11_RESTYPE_NONE);
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return Success;
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}
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/*
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* If the given request doesn't exactly match PutImage's constraints,
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* wrap the image in a scratch pixmap header and let CopyArea sort it out.
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*/
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static void
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doShmPutImage(DrawablePtr dst, GCPtr pGC,
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int depth, unsigned int format,
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int w, int h, int sx, int sy, int sw, int sh, int dx, int dy,
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char *data)
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{
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PixmapPtr pPixmap;
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if (format == ZPixmap || (format == XYPixmap && depth == 1)) {
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pPixmap = GetScratchPixmapHeader(dst->pScreen, w, h, depth,
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BitsPerPixel(depth),
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PixmapBytePad(w, depth), data);
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if (!pPixmap)
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return;
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(void) pGC->ops->CopyArea((DrawablePtr) pPixmap, dst, pGC,
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sx, sy, sw, sh, dx, dy);
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FreeScratchPixmapHeader(pPixmap);
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}
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else {
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GCPtr putGC = GetScratchGC(depth, dst->pScreen);
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|
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if (!putGC)
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return;
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pPixmap = (*dst->pScreen->CreatePixmap) (dst->pScreen, sw, sh, depth,
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CREATE_PIXMAP_USAGE_SCRATCH);
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if (!pPixmap) {
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FreeScratchGC(putGC);
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return;
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}
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ValidateGC(&pPixmap->drawable, putGC);
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(*putGC->ops->PutImage) (&pPixmap->drawable, putGC, depth, -sx, -sy, w,
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h, 0,
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(format == XYPixmap) ? XYPixmap : ZPixmap,
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data);
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FreeScratchGC(putGC);
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if (format == XYBitmap)
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(void) (*pGC->ops->CopyPlane) (&pPixmap->drawable, dst, pGC, 0, 0,
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sw, sh, dx, dy, 1L);
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else
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(void) (*pGC->ops->CopyArea) (&pPixmap->drawable, dst, pGC, 0, 0,
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sw, sh, dx, dy);
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dixDestroyPixmap(pPixmap, 0);
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}
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}
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static int
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ShmPutImage(ClientPtr client, xShmPutImageReq *stuff)
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{
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GCPtr pGC;
|
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DrawablePtr pDraw;
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long length;
|
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ShmDescPtr shmdesc;
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|
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VALIDATE_DRAWABLE_AND_GC(stuff->drawable, pDraw, DixWriteAccess);
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VERIFY_SHMPTR(stuff->shmseg, stuff->offset, FALSE, shmdesc, client);
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if ((stuff->sendEvent != xTrue) && (stuff->sendEvent != xFalse))
|
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return BadValue;
|
|
if (stuff->format == XYBitmap) {
|
|
if (stuff->depth != 1)
|
|
return BadMatch;
|
|
length = PixmapBytePad(stuff->totalWidth, 1);
|
|
}
|
|
else if (stuff->format == XYPixmap) {
|
|
if (pDraw->depth != stuff->depth)
|
|
return BadMatch;
|
|
length = PixmapBytePad(stuff->totalWidth, 1);
|
|
length *= stuff->depth;
|
|
}
|
|
else if (stuff->format == ZPixmap) {
|
|
if (pDraw->depth != stuff->depth)
|
|
return BadMatch;
|
|
length = PixmapBytePad(stuff->totalWidth, stuff->depth);
|
|
}
|
|
else {
|
|
client->errorValue = stuff->format;
|
|
return BadValue;
|
|
}
|
|
|
|
/*
|
|
* There's a potential integer overflow in this check:
|
|
* VERIFY_SHMSIZE(shmdesc, stuff->offset, length * stuff->totalHeight,
|
|
* client);
|
|
* the version below ought to avoid it
|
|
*/
|
|
if (stuff->totalHeight != 0 &&
|
|
length > (shmdesc->size - stuff->offset) / stuff->totalHeight) {
|
|
client->errorValue = stuff->totalWidth;
|
|
return BadValue;
|
|
}
|
|
if (stuff->srcX > stuff->totalWidth) {
|
|
client->errorValue = stuff->srcX;
|
|
return BadValue;
|
|
}
|
|
if (stuff->srcY > stuff->totalHeight) {
|
|
client->errorValue = stuff->srcY;
|
|
return BadValue;
|
|
}
|
|
if ((stuff->srcX + stuff->srcWidth) > stuff->totalWidth) {
|
|
client->errorValue = stuff->srcWidth;
|
|
return BadValue;
|
|
}
|
|
if ((stuff->srcY + stuff->srcHeight) > stuff->totalHeight) {
|
|
client->errorValue = stuff->srcHeight;
|
|
return BadValue;
|
|
}
|
|
|
|
if ((((stuff->format == ZPixmap) && (stuff->srcX == 0)) ||
|
|
((stuff->format != ZPixmap) &&
|
|
(stuff->srcX < screenInfo.bitmapScanlinePad) &&
|
|
((stuff->format == XYBitmap) ||
|
|
((stuff->srcY == 0) &&
|
|
(stuff->srcHeight == stuff->totalHeight))))) &&
|
|
((stuff->srcX + stuff->srcWidth) == stuff->totalWidth))
|
|
(*pGC->ops->PutImage) (pDraw, pGC, stuff->depth,
|
|
stuff->dstX, stuff->dstY,
|
|
stuff->totalWidth, stuff->srcHeight,
|
|
stuff->srcX, stuff->format,
|
|
shmdesc->addr + stuff->offset +
|
|
(stuff->srcY * length));
|
|
else
|
|
doShmPutImage(pDraw, pGC, stuff->depth, stuff->format,
|
|
stuff->totalWidth, stuff->totalHeight,
|
|
stuff->srcX, stuff->srcY,
|
|
stuff->srcWidth, stuff->srcHeight,
|
|
stuff->dstX, stuff->dstY, shmdesc->addr + stuff->offset);
|
|
|
|
if (stuff->sendEvent) {
|
|
xShmCompletionEvent ev = {
|
|
.type = ShmCompletionCode,
|
|
.drawable = stuff->drawable,
|
|
.minorEvent = X_ShmPutImage,
|
|
.majorEvent = ShmReqCode,
|
|
.shmseg = stuff->shmseg,
|
|
.offset = stuff->offset
|
|
};
|
|
WriteEventsToClient(client, 1, (xEvent *) &ev);
|
|
}
|
|
|
|
return Success;
|
|
}
|
|
|
|
static int
|
|
ShmGetImage(ClientPtr client, xShmGetImageReq *stuff)
|
|
{
|
|
DrawablePtr pDraw;
|
|
long lenPer = 0, length;
|
|
Mask plane = 0;
|
|
xShmGetImageReply xgi;
|
|
ShmDescPtr shmdesc;
|
|
VisualID visual = None;
|
|
RegionPtr pVisibleRegion = NULL;
|
|
int rc;
|
|
|
|
if ((stuff->format != XYPixmap) && (stuff->format != ZPixmap)) {
|
|
client->errorValue = stuff->format;
|
|
return BadValue;
|
|
}
|
|
rc = dixLookupDrawable(&pDraw, stuff->drawable, client, 0, DixReadAccess);
|
|
if (rc != Success)
|
|
return rc;
|
|
VERIFY_SHMPTR(stuff->shmseg, stuff->offset, TRUE, shmdesc, client);
|
|
if (pDraw->type == DRAWABLE_WINDOW) {
|
|
if ( /* check for being viewable */
|
|
!((WindowPtr) pDraw)->realized ||
|
|
/* check for being on screen */
|
|
pDraw->x + stuff->x < 0 ||
|
|
pDraw->x + stuff->x + (int) stuff->width > pDraw->pScreen->width
|
|
|| pDraw->y + stuff->y < 0 ||
|
|
pDraw->y + stuff->y + (int) stuff->height >
|
|
pDraw->pScreen->height ||
|
|
/* check for being inside of border */
|
|
stuff->x < -wBorderWidth((WindowPtr) pDraw) ||
|
|
stuff->x + (int) stuff->width >
|
|
wBorderWidth((WindowPtr) pDraw) + (int) pDraw->width ||
|
|
stuff->y < -wBorderWidth((WindowPtr) pDraw) ||
|
|
stuff->y + (int) stuff->height >
|
|
wBorderWidth((WindowPtr) pDraw) + (int) pDraw->height)
|
|
return BadMatch;
|
|
visual = wVisual(((WindowPtr) pDraw));
|
|
if (pDraw->type == DRAWABLE_WINDOW)
|
|
pVisibleRegion = &((WindowPtr) pDraw)->borderClip;
|
|
pDraw->pScreen->SourceValidate(pDraw, stuff->x, stuff->y,
|
|
stuff->width, stuff->height,
|
|
IncludeInferiors);
|
|
}
|
|
else {
|
|
if (stuff->x < 0 ||
|
|
stuff->x + (int) stuff->width > pDraw->width ||
|
|
stuff->y < 0 || stuff->y + (int) stuff->height > pDraw->height)
|
|
return BadMatch;
|
|
visual = None;
|
|
}
|
|
xgi = (xShmGetImageReply) {
|
|
.type = X_Reply,
|
|
.sequenceNumber = client->sequence,
|
|
.length = 0,
|
|
.visual = visual,
|
|
.depth = pDraw->depth
|
|
};
|
|
if (stuff->format == ZPixmap) {
|
|
length = PixmapBytePad(stuff->width, pDraw->depth) * stuff->height;
|
|
}
|
|
else {
|
|
lenPer = PixmapBytePad(stuff->width, 1) * stuff->height;
|
|
plane = ((Mask) 1) << (pDraw->depth - 1);
|
|
/* only planes asked for */
|
|
length = lenPer * Ones(stuff->planeMask & (plane | (plane - 1)));
|
|
}
|
|
|
|
VERIFY_SHMSIZE(shmdesc, stuff->offset, length, client);
|
|
xgi.size = length;
|
|
|
|
if (length == 0) {
|
|
/* nothing to do */
|
|
}
|
|
else if (stuff->format == ZPixmap) {
|
|
(*pDraw->pScreen->GetImage) (pDraw, stuff->x, stuff->y,
|
|
stuff->width, stuff->height,
|
|
stuff->format, stuff->planeMask,
|
|
shmdesc->addr + stuff->offset);
|
|
if (pVisibleRegion)
|
|
XaceCensorImage(client, pVisibleRegion,
|
|
PixmapBytePad(stuff->width, pDraw->depth), pDraw,
|
|
stuff->x, stuff->y, stuff->width, stuff->height,
|
|
stuff->format, shmdesc->addr + stuff->offset);
|
|
}
|
|
else {
|
|
|
|
length = stuff->offset;
|
|
for (; plane; plane >>= 1) {
|
|
if (stuff->planeMask & plane) {
|
|
(*pDraw->pScreen->GetImage) (pDraw,
|
|
stuff->x, stuff->y,
|
|
stuff->width, stuff->height,
|
|
stuff->format, plane,
|
|
shmdesc->addr + length);
|
|
if (pVisibleRegion)
|
|
XaceCensorImage(client, pVisibleRegion,
|
|
BitmapBytePad(stuff->width), pDraw,
|
|
stuff->x, stuff->y, stuff->width, stuff->height,
|
|
stuff->format, shmdesc->addr + length);
|
|
length += lenPer;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (client->swapped) {
|
|
swaps(&xgi.sequenceNumber);
|
|
swapl(&xgi.length);
|
|
swapl(&xgi.visual);
|
|
swapl(&xgi.size);
|
|
}
|
|
WriteToClient(client, sizeof(xShmGetImageReply), &xgi);
|
|
|
|
return Success;
|
|
}
|
|
|
|
static int
|
|
ProcShmPutImage(ClientPtr client)
|
|
{
|
|
REQUEST(xShmPutImageReq);
|
|
REQUEST_SIZE_MATCH(xShmPutImageReq);
|
|
|
|
if (!client->local)
|
|
return BadRequest;
|
|
|
|
#ifdef XINERAMA
|
|
int j, result, orig_x, orig_y;
|
|
PanoramiXRes *draw, *gc;
|
|
Bool sendEvent, isRoot;
|
|
|
|
if (noPanoramiXExtension)
|
|
return ShmPutImage(client, stuff);
|
|
|
|
result = dixLookupResourceByClass((void **) &draw, stuff->drawable,
|
|
XRC_DRAWABLE, client, DixWriteAccess);
|
|
if (result != Success)
|
|
return (result == BadValue) ? BadDrawable : result;
|
|
|
|
result = dixLookupResourceByType((void **) &gc, stuff->gc,
|
|
XRT_GC, client, DixReadAccess);
|
|
if (result != Success)
|
|
return result;
|
|
|
|
isRoot = (draw->type == XRT_WINDOW) && draw->u.win.root;
|
|
|
|
orig_x = stuff->dstX;
|
|
orig_y = stuff->dstY;
|
|
sendEvent = stuff->sendEvent;
|
|
stuff->sendEvent = 0;
|
|
FOR_NSCREENS_BACKWARD(j) {
|
|
if (!j)
|
|
stuff->sendEvent = sendEvent;
|
|
stuff->drawable = draw->info[j].id;
|
|
stuff->gc = gc->info[j].id;
|
|
if (isRoot) {
|
|
stuff->dstX = orig_x - screenInfo.screens[j]->x;
|
|
stuff->dstY = orig_y - screenInfo.screens[j]->y;
|
|
}
|
|
result = ShmPutImage(client, stuff);
|
|
if (result != Success)
|
|
break;
|
|
}
|
|
return result;
|
|
#else
|
|
return ShmPutImage(client, stuff);
|
|
#endif /* XINERAMA */
|
|
}
|
|
|
|
static int
|
|
ProcShmGetImage(ClientPtr client)
|
|
{
|
|
REQUEST(xShmGetImageReq);
|
|
REQUEST_SIZE_MATCH(xShmGetImageReq);
|
|
|
|
if (!client->local)
|
|
return BadRequest;
|
|
|
|
#ifdef XINERAMA
|
|
PanoramiXRes *draw;
|
|
DrawablePtr pDraw;
|
|
xShmGetImageReply xgi;
|
|
ShmDescPtr shmdesc;
|
|
int i, x, y, w, h, format, rc;
|
|
Mask plane = 0, planemask;
|
|
long lenPer = 0, length, widthBytesLine;
|
|
Bool isRoot;
|
|
|
|
if (noPanoramiXExtension)
|
|
return ShmGetImage(client, stuff);
|
|
|
|
if ((stuff->format != XYPixmap) && (stuff->format != ZPixmap)) {
|
|
client->errorValue = stuff->format;
|
|
return BadValue;
|
|
}
|
|
|
|
rc = dixLookupResourceByClass((void **) &draw, stuff->drawable,
|
|
XRC_DRAWABLE, client, DixWriteAccess);
|
|
if (rc != Success)
|
|
return (rc == BadValue) ? BadDrawable : rc;
|
|
|
|
if (draw->type == XRT_PIXMAP)
|
|
return ShmGetImage(client, stuff);
|
|
|
|
rc = dixLookupDrawable(&pDraw, stuff->drawable, client, 0, DixReadAccess);
|
|
if (rc != Success)
|
|
return rc;
|
|
|
|
VERIFY_SHMPTR(stuff->shmseg, stuff->offset, TRUE, shmdesc, client);
|
|
|
|
x = stuff->x;
|
|
y = stuff->y;
|
|
w = stuff->width;
|
|
h = stuff->height;
|
|
format = stuff->format;
|
|
planemask = stuff->planeMask;
|
|
|
|
isRoot = (draw->type == XRT_WINDOW) && draw->u.win.root;
|
|
|
|
if (isRoot) {
|
|
if ( /* check for being onscreen */
|
|
x < 0 || x + w > PanoramiXPixWidth ||
|
|
y < 0 || y + h > PanoramiXPixHeight)
|
|
return BadMatch;
|
|
}
|
|
else {
|
|
if ( /* check for being onscreen */
|
|
screenInfo.screens[0]->x + pDraw->x + x < 0 ||
|
|
screenInfo.screens[0]->x + pDraw->x + x + w > PanoramiXPixWidth
|
|
|| screenInfo.screens[0]->y + pDraw->y + y < 0 ||
|
|
screenInfo.screens[0]->y + pDraw->y + y + h > PanoramiXPixHeight
|
|
||
|
|
/* check for being inside of border */
|
|
x < -wBorderWidth((WindowPtr) pDraw) ||
|
|
x + w > wBorderWidth((WindowPtr) pDraw) + (int) pDraw->width ||
|
|
y < -wBorderWidth((WindowPtr) pDraw) ||
|
|
y + h > wBorderWidth((WindowPtr) pDraw) + (int) pDraw->height)
|
|
return BadMatch;
|
|
}
|
|
|
|
if (format == ZPixmap) {
|
|
widthBytesLine = PixmapBytePad(w, pDraw->depth);
|
|
length = widthBytesLine * h;
|
|
}
|
|
else {
|
|
widthBytesLine = PixmapBytePad(w, 1);
|
|
lenPer = widthBytesLine * h;
|
|
plane = ((Mask) 1) << (pDraw->depth - 1);
|
|
length = lenPer * Ones(planemask & (plane | (plane - 1)));
|
|
}
|
|
|
|
VERIFY_SHMSIZE(shmdesc, stuff->offset, length, client);
|
|
|
|
DrawablePtr *drawables = calloc(PanoramiXNumScreens, sizeof(DrawablePtr));
|
|
if (!drawables)
|
|
return BadAlloc;
|
|
|
|
drawables[0] = pDraw;
|
|
FOR_NSCREENS_FORWARD_SKIP(i) {
|
|
rc = dixLookupDrawable(drawables + i, draw->info[i].id, client, 0,
|
|
DixReadAccess);
|
|
if (rc != Success) {
|
|
free(drawables);
|
|
return rc;
|
|
}
|
|
}
|
|
FOR_NSCREENS_FORWARD(i) {
|
|
drawables[i]->pScreen->SourceValidate(drawables[i], 0, 0,
|
|
drawables[i]->width,
|
|
drawables[i]->height,
|
|
IncludeInferiors);
|
|
}
|
|
|
|
xgi = (xShmGetImageReply) {
|
|
.type = X_Reply,
|
|
.sequenceNumber = client->sequence,
|
|
.length = 0,
|
|
.visual = wVisual(((WindowPtr) pDraw)),
|
|
.depth = pDraw->depth
|
|
};
|
|
|
|
xgi.size = length;
|
|
|
|
if (length == 0) { /* nothing to do */
|
|
}
|
|
else if (format == ZPixmap) {
|
|
XineramaGetImageData(drawables, x, y, w, h, format, planemask,
|
|
shmdesc->addr + stuff->offset,
|
|
widthBytesLine, isRoot);
|
|
}
|
|
else {
|
|
|
|
length = stuff->offset;
|
|
for (; plane; plane >>= 1) {
|
|
if (planemask & plane) {
|
|
XineramaGetImageData(drawables, x, y, w, h,
|
|
format, plane, shmdesc->addr + length,
|
|
widthBytesLine, isRoot);
|
|
length += lenPer;
|
|
}
|
|
}
|
|
}
|
|
free(drawables);
|
|
|
|
if (client->swapped) {
|
|
swaps(&xgi.sequenceNumber);
|
|
swapl(&xgi.length);
|
|
swapl(&xgi.visual);
|
|
swapl(&xgi.size);
|
|
}
|
|
WriteToClient(client, sizeof(xShmGetImageReply), &xgi);
|
|
|
|
return Success;
|
|
#else
|
|
return ShmGetImage(client, stuff);
|
|
#endif /* XINERAMA */
|
|
}
|
|
|
|
static int
|
|
ProcShmCreatePixmap(ClientPtr client)
|
|
{
|
|
REQUEST(xShmCreatePixmapReq);
|
|
REQUEST_SIZE_MATCH(xShmCreatePixmapReq);
|
|
|
|
if (!client->local)
|
|
return BadRequest;
|
|
|
|
#ifdef XINERAMA
|
|
if (noPanoramiXExtension)
|
|
return ShmCreatePixmap(client, stuff);
|
|
|
|
ScreenPtr pScreen = NULL;
|
|
PixmapPtr pMap = NULL;
|
|
DrawablePtr pDraw;
|
|
DepthPtr pDepth;
|
|
int i, j, result, rc;
|
|
ShmDescPtr shmdesc;
|
|
unsigned int width, height, depth;
|
|
unsigned long size;
|
|
PanoramiXRes *newPix;
|
|
|
|
client->errorValue = stuff->pid;
|
|
if (!sharedPixmaps)
|
|
return BadImplementation;
|
|
LEGAL_NEW_RESOURCE(stuff->pid, client);
|
|
rc = dixLookupDrawable(&pDraw, stuff->drawable, client, M_ANY,
|
|
DixGetAttrAccess);
|
|
if (rc != Success)
|
|
return rc;
|
|
|
|
VERIFY_SHMPTR(stuff->shmseg, stuff->offset, TRUE, shmdesc, client);
|
|
|
|
width = stuff->width;
|
|
height = stuff->height;
|
|
depth = stuff->depth;
|
|
if (!width || !height || !depth) {
|
|
client->errorValue = 0;
|
|
return BadValue;
|
|
}
|
|
if (width > 32767 || height > 32767)
|
|
return BadAlloc;
|
|
|
|
if (stuff->depth != 1) {
|
|
pDepth = pDraw->pScreen->allowedDepths;
|
|
for (i = 0; i < pDraw->pScreen->numDepths; i++, pDepth++)
|
|
if (pDepth->depth == stuff->depth)
|
|
goto CreatePmap;
|
|
client->errorValue = stuff->depth;
|
|
return BadValue;
|
|
}
|
|
|
|
CreatePmap:
|
|
size = PixmapBytePad(width, depth) * height;
|
|
if (sizeof(size) == 4 && BitsPerPixel(depth) > 8) {
|
|
if (size < width * height)
|
|
return BadAlloc;
|
|
}
|
|
/* thankfully, offset is unsigned */
|
|
if (stuff->offset + size < size)
|
|
return BadAlloc;
|
|
|
|
VERIFY_SHMSIZE(shmdesc, stuff->offset, size, client);
|
|
|
|
if (!(newPix = calloc(1, sizeof(PanoramiXRes))))
|
|
return BadAlloc;
|
|
|
|
newPix->type = XRT_PIXMAP;
|
|
newPix->u.pix.shared = TRUE;
|
|
panoramix_setup_ids(newPix, client, stuff->pid);
|
|
|
|
result = Success;
|
|
|
|
FOR_NSCREENS_BACKWARD(j) {
|
|
ShmScrPrivateRec *screen_priv;
|
|
|
|
pScreen = screenInfo.screens[j];
|
|
|
|
screen_priv = ShmGetScreenPriv(pScreen);
|
|
pMap = (*screen_priv->shmFuncs->CreatePixmap) (pScreen,
|
|
stuff->width,
|
|
stuff->height,
|
|
stuff->depth,
|
|
shmdesc->addr +
|
|
stuff->offset);
|
|
|
|
if (pMap) {
|
|
result = XaceHookResourceAccess(client, stuff->pid,
|
|
X11_RESTYPE_PIXMAP, pMap, X11_RESTYPE_NONE, NULL, DixCreateAccess);
|
|
if (result != Success) {
|
|
dixDestroyPixmap(pMap, 0);
|
|
break;
|
|
}
|
|
dixSetPrivate(&pMap->devPrivates, shmPixmapPrivateKey, shmdesc);
|
|
shmdesc->refcnt++;
|
|
pMap->drawable.serialNumber = NEXT_SERIAL_NUMBER;
|
|
pMap->drawable.id = newPix->info[j].id;
|
|
if (!AddResource(newPix->info[j].id, X11_RESTYPE_PIXMAP, (void *) pMap)) {
|
|
result = BadAlloc;
|
|
break;
|
|
}
|
|
}
|
|
else {
|
|
result = BadAlloc;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (result != Success) {
|
|
while (j--)
|
|
FreeResource(newPix->info[j].id, X11_RESTYPE_NONE);
|
|
free(newPix);
|
|
}
|
|
else
|
|
AddResource(stuff->pid, XRT_PIXMAP, newPix);
|
|
|
|
return result;
|
|
#else
|
|
return ShmCreatePixmap(client, stuff);
|
|
#endif /* XINERAMA */
|
|
}
|
|
|
|
static PixmapPtr
|
|
fbShmCreatePixmap(ScreenPtr pScreen,
|
|
int width, int height, int depth, char *addr)
|
|
{
|
|
PixmapPtr pPixmap;
|
|
|
|
pPixmap = (*pScreen->CreatePixmap) (pScreen, 0, 0, pScreen->rootDepth, 0);
|
|
if (!pPixmap)
|
|
return NullPixmap;
|
|
|
|
if (!(*pScreen->ModifyPixmapHeader) (pPixmap, width, height, depth,
|
|
BitsPerPixel(depth),
|
|
PixmapBytePad(width, depth),
|
|
(void *) addr)) {
|
|
dixDestroyPixmap(pPixmap, 0);
|
|
return NullPixmap;
|
|
}
|
|
return pPixmap;
|
|
}
|
|
|
|
static int
|
|
ShmCreatePixmap(ClientPtr client, xShmCreatePixmapReq *stuff)
|
|
{
|
|
PixmapPtr pMap;
|
|
DrawablePtr pDraw;
|
|
DepthPtr pDepth;
|
|
int i, rc;
|
|
ShmDescPtr shmdesc;
|
|
ShmScrPrivateRec *screen_priv;
|
|
unsigned int width, height, depth;
|
|
unsigned long size;
|
|
|
|
client->errorValue = stuff->pid;
|
|
if (!sharedPixmaps)
|
|
return BadImplementation;
|
|
LEGAL_NEW_RESOURCE(stuff->pid, client);
|
|
rc = dixLookupDrawable(&pDraw, stuff->drawable, client, M_ANY,
|
|
DixGetAttrAccess);
|
|
if (rc != Success)
|
|
return rc;
|
|
|
|
VERIFY_SHMPTR(stuff->shmseg, stuff->offset, TRUE, shmdesc, client);
|
|
|
|
width = stuff->width;
|
|
height = stuff->height;
|
|
depth = stuff->depth;
|
|
if (!width || !height || !depth) {
|
|
client->errorValue = 0;
|
|
return BadValue;
|
|
}
|
|
if (width > 32767 || height > 32767)
|
|
return BadAlloc;
|
|
|
|
if (stuff->depth != 1) {
|
|
pDepth = pDraw->pScreen->allowedDepths;
|
|
for (i = 0; i < pDraw->pScreen->numDepths; i++, pDepth++)
|
|
if (pDepth->depth == stuff->depth)
|
|
goto CreatePmap;
|
|
client->errorValue = stuff->depth;
|
|
return BadValue;
|
|
}
|
|
|
|
CreatePmap:
|
|
size = PixmapBytePad(width, depth) * height;
|
|
if (sizeof(size) == 4 && BitsPerPixel(depth) > 8) {
|
|
if (size < width * height)
|
|
return BadAlloc;
|
|
}
|
|
/* thankfully, offset is unsigned */
|
|
if (stuff->offset + size < size)
|
|
return BadAlloc;
|
|
|
|
VERIFY_SHMSIZE(shmdesc, stuff->offset, size, client);
|
|
screen_priv = ShmGetScreenPriv(pDraw->pScreen);
|
|
pMap = (*screen_priv->shmFuncs->CreatePixmap) (pDraw->pScreen, stuff->width,
|
|
stuff->height, stuff->depth,
|
|
shmdesc->addr +
|
|
stuff->offset);
|
|
if (pMap) {
|
|
rc = XaceHookResourceAccess(client, stuff->pid, X11_RESTYPE_PIXMAP,
|
|
pMap, X11_RESTYPE_NONE, NULL, DixCreateAccess);
|
|
if (rc != Success) {
|
|
dixDestroyPixmap(pMap, 0);
|
|
return rc;
|
|
}
|
|
dixSetPrivate(&pMap->devPrivates, shmPixmapPrivateKey, shmdesc);
|
|
shmdesc->refcnt++;
|
|
pMap->drawable.serialNumber = NEXT_SERIAL_NUMBER;
|
|
pMap->drawable.id = stuff->pid;
|
|
if (AddResource(stuff->pid, X11_RESTYPE_PIXMAP, (void *) pMap)) {
|
|
return Success;
|
|
}
|
|
}
|
|
return BadAlloc;
|
|
}
|
|
|
|
#ifdef SHM_FD_PASSING
|
|
|
|
static void
|
|
ShmBusfaultNotify(void *context)
|
|
{
|
|
ShmDescPtr shmdesc = context;
|
|
|
|
ErrorF("shared memory 0x%x truncated by client\n",
|
|
(unsigned int) shmdesc->resource);
|
|
busfault_unregister(shmdesc->busfault);
|
|
shmdesc->busfault = NULL;
|
|
FreeResource (shmdesc->resource, X11_RESTYPE_NONE);
|
|
}
|
|
|
|
static int
|
|
ProcShmAttachFd(ClientPtr client)
|
|
{
|
|
REQUEST(xShmAttachFdReq);
|
|
REQUEST_SIZE_MATCH(xShmAttachFdReq);
|
|
|
|
if (!client->local)
|
|
return BadRequest;
|
|
|
|
int fd;
|
|
ShmDescPtr shmdesc;
|
|
struct stat statb;
|
|
|
|
SetReqFds(client, 1);
|
|
LEGAL_NEW_RESOURCE(stuff->shmseg, client);
|
|
if ((stuff->readOnly != xTrue) && (stuff->readOnly != xFalse)) {
|
|
client->errorValue = stuff->readOnly;
|
|
return BadValue;
|
|
}
|
|
fd = ReadFdFromClient(client);
|
|
if (fd < 0)
|
|
return BadMatch;
|
|
|
|
if (fstat(fd, &statb) < 0 || statb.st_size == 0) {
|
|
close(fd);
|
|
return BadMatch;
|
|
}
|
|
|
|
shmdesc = calloc(1, sizeof(ShmDescRec));
|
|
if (!shmdesc) {
|
|
close(fd);
|
|
return BadAlloc;
|
|
}
|
|
shmdesc->is_fd = TRUE;
|
|
shmdesc->addr = mmap(NULL, statb.st_size,
|
|
stuff->readOnly ? PROT_READ : PROT_READ|PROT_WRITE,
|
|
MAP_SHARED,
|
|
fd, 0);
|
|
|
|
close(fd);
|
|
if (shmdesc->addr == ((char *) -1)) {
|
|
free(shmdesc);
|
|
return BadAccess;
|
|
}
|
|
|
|
shmdesc->refcnt = 1;
|
|
shmdesc->writable = !stuff->readOnly;
|
|
shmdesc->size = statb.st_size;
|
|
shmdesc->resource = stuff->shmseg;
|
|
|
|
shmdesc->busfault = busfault_register_mmap(shmdesc->addr, shmdesc->size, ShmBusfaultNotify, shmdesc);
|
|
if (!shmdesc->busfault) {
|
|
munmap(shmdesc->addr, shmdesc->size);
|
|
free(shmdesc);
|
|
return BadAlloc;
|
|
}
|
|
|
|
shmdesc->next = Shmsegs;
|
|
Shmsegs = shmdesc;
|
|
|
|
if (!AddResource(stuff->shmseg, ShmSegType, (void *) shmdesc))
|
|
return BadAlloc;
|
|
return Success;
|
|
}
|
|
|
|
static int
|
|
shm_tmpfile(void)
|
|
{
|
|
const char *shmdirs[] = {
|
|
"/run/shm",
|
|
"/var/tmp",
|
|
"/tmp",
|
|
};
|
|
int fd;
|
|
|
|
#ifdef HAVE_MEMFD_CREATE
|
|
fd = memfd_create("xorg", MFD_CLOEXEC|MFD_ALLOW_SEALING);
|
|
if (fd != -1) {
|
|
fcntl(fd, F_ADD_SEALS, F_SEAL_SHRINK);
|
|
DebugF ("Using memfd_create\n");
|
|
return fd;
|
|
}
|
|
#endif
|
|
|
|
#ifdef O_TMPFILE
|
|
for (int i = 0; i < ARRAY_SIZE(shmdirs); i++) {
|
|
fd = open(shmdirs[i], O_TMPFILE|O_RDWR|O_CLOEXEC|O_EXCL, 0666);
|
|
if (fd >= 0) {
|
|
DebugF ("Using O_TMPFILE\n");
|
|
return fd;
|
|
}
|
|
}
|
|
ErrorF ("Not using O_TMPFILE\n");
|
|
#endif
|
|
|
|
for (int i = 0; i < ARRAY_SIZE(shmdirs); i++) {
|
|
char template[PATH_MAX];
|
|
snprintf(template, ARRAY_SIZE(template), "%s/shmfd-XXXXXX", shmdirs[i]);
|
|
#ifdef HAVE_MKOSTEMP
|
|
fd = mkostemp(template, O_CLOEXEC);
|
|
#else
|
|
fd = mkstemp(template);
|
|
#endif
|
|
if (fd < 0)
|
|
continue;
|
|
unlink(template);
|
|
#ifndef HAVE_MKOSTEMP
|
|
int flags = fcntl(fd, F_GETFD);
|
|
if (flags != -1) {
|
|
flags |= FD_CLOEXEC;
|
|
(void) fcntl(fd, F_SETFD, flags);
|
|
}
|
|
#endif
|
|
return fd;
|
|
}
|
|
|
|
return -1;
|
|
}
|
|
|
|
static int
|
|
ProcShmCreateSegment(ClientPtr client)
|
|
{
|
|
REQUEST(xShmCreateSegmentReq);
|
|
REQUEST_SIZE_MATCH(xShmCreateSegmentReq);
|
|
|
|
if (!client->local)
|
|
return BadRequest;
|
|
|
|
int fd;
|
|
ShmDescPtr shmdesc;
|
|
xShmCreateSegmentReply rep = {
|
|
.type = X_Reply,
|
|
.nfd = 1,
|
|
.sequenceNumber = client->sequence,
|
|
.length = 0,
|
|
};
|
|
|
|
LEGAL_NEW_RESOURCE(stuff->shmseg, client);
|
|
if ((stuff->readOnly != xTrue) && (stuff->readOnly != xFalse)) {
|
|
client->errorValue = stuff->readOnly;
|
|
return BadValue;
|
|
}
|
|
fd = shm_tmpfile();
|
|
if (fd < 0)
|
|
return BadAlloc;
|
|
if (ftruncate(fd, stuff->size) < 0) {
|
|
close(fd);
|
|
return BadAlloc;
|
|
}
|
|
shmdesc = calloc(1, sizeof(ShmDescRec));
|
|
if (!shmdesc) {
|
|
close(fd);
|
|
return BadAlloc;
|
|
}
|
|
shmdesc->is_fd = TRUE;
|
|
shmdesc->addr = mmap(NULL, stuff->size,
|
|
stuff->readOnly ? PROT_READ : PROT_READ|PROT_WRITE,
|
|
MAP_SHARED,
|
|
fd, 0);
|
|
|
|
if (shmdesc->addr == ((char *) -1)) {
|
|
close(fd);
|
|
free(shmdesc);
|
|
return BadAccess;
|
|
}
|
|
|
|
shmdesc->refcnt = 1;
|
|
shmdesc->writable = !stuff->readOnly;
|
|
shmdesc->size = stuff->size;
|
|
|
|
shmdesc->busfault = busfault_register_mmap(shmdesc->addr, shmdesc->size, ShmBusfaultNotify, shmdesc);
|
|
if (!shmdesc->busfault) {
|
|
close(fd);
|
|
munmap(shmdesc->addr, shmdesc->size);
|
|
free(shmdesc);
|
|
return BadAlloc;
|
|
}
|
|
|
|
shmdesc->next = Shmsegs;
|
|
Shmsegs = shmdesc;
|
|
|
|
if (!AddResource(stuff->shmseg, ShmSegType, (void *) shmdesc)) {
|
|
close(fd);
|
|
return BadAlloc;
|
|
}
|
|
|
|
if (WriteFdToClient(client, fd, TRUE) < 0) {
|
|
FreeResource(stuff->shmseg, X11_RESTYPE_NONE);
|
|
close(fd);
|
|
return BadAlloc;
|
|
}
|
|
WriteToClient(client, sizeof (xShmCreateSegmentReply), &rep);
|
|
return Success;
|
|
}
|
|
#endif /* SHM_FD_PASSING */
|
|
|
|
static int
|
|
ProcShmDispatch(ClientPtr client)
|
|
{
|
|
REQUEST(xReq);
|
|
|
|
switch (stuff->data) {
|
|
case X_ShmQueryVersion:
|
|
return ProcShmQueryVersion(client);
|
|
case X_ShmAttach:
|
|
return ProcShmAttach(client);
|
|
case X_ShmDetach:
|
|
return ProcShmDetach(client);
|
|
case X_ShmPutImage:
|
|
return ProcShmPutImage(client);
|
|
case X_ShmGetImage:
|
|
return ProcShmGetImage(client);
|
|
case X_ShmCreatePixmap:
|
|
return ProcShmCreatePixmap(client);
|
|
#ifdef SHM_FD_PASSING
|
|
case X_ShmAttachFd:
|
|
return ProcShmAttachFd(client);
|
|
case X_ShmCreateSegment:
|
|
return ProcShmCreateSegment(client);
|
|
#endif
|
|
default:
|
|
return BadRequest;
|
|
}
|
|
}
|
|
|
|
static void _X_COLD
|
|
SShmCompletionEvent(xShmCompletionEvent * from, xShmCompletionEvent * to)
|
|
{
|
|
to->type = from->type;
|
|
cpswaps(from->sequenceNumber, to->sequenceNumber);
|
|
cpswapl(from->drawable, to->drawable);
|
|
cpswaps(from->minorEvent, to->minorEvent);
|
|
to->majorEvent = from->majorEvent;
|
|
cpswapl(from->shmseg, to->shmseg);
|
|
cpswapl(from->offset, to->offset);
|
|
}
|
|
|
|
static int _X_COLD
|
|
SProcShmAttach(ClientPtr client)
|
|
{
|
|
REQUEST(xShmAttachReq);
|
|
REQUEST_SIZE_MATCH(xShmAttachReq);
|
|
swapl(&stuff->shmseg);
|
|
swapl(&stuff->shmid);
|
|
return ProcShmAttach(client);
|
|
}
|
|
|
|
static int _X_COLD
|
|
SProcShmDetach(ClientPtr client)
|
|
{
|
|
REQUEST(xShmDetachReq);
|
|
REQUEST_SIZE_MATCH(xShmDetachReq);
|
|
swapl(&stuff->shmseg);
|
|
return ProcShmDetach(client);
|
|
}
|
|
|
|
static int _X_COLD
|
|
SProcShmPutImage(ClientPtr client)
|
|
{
|
|
REQUEST(xShmPutImageReq);
|
|
REQUEST_SIZE_MATCH(xShmPutImageReq);
|
|
swapl(&stuff->drawable);
|
|
swapl(&stuff->gc);
|
|
swaps(&stuff->totalWidth);
|
|
swaps(&stuff->totalHeight);
|
|
swaps(&stuff->srcX);
|
|
swaps(&stuff->srcY);
|
|
swaps(&stuff->srcWidth);
|
|
swaps(&stuff->srcHeight);
|
|
swaps(&stuff->dstX);
|
|
swaps(&stuff->dstY);
|
|
swapl(&stuff->shmseg);
|
|
swapl(&stuff->offset);
|
|
return ProcShmPutImage(client);
|
|
}
|
|
|
|
static int _X_COLD
|
|
SProcShmGetImage(ClientPtr client)
|
|
{
|
|
REQUEST(xShmGetImageReq);
|
|
REQUEST_SIZE_MATCH(xShmGetImageReq);
|
|
swapl(&stuff->drawable);
|
|
swaps(&stuff->x);
|
|
swaps(&stuff->y);
|
|
swaps(&stuff->width);
|
|
swaps(&stuff->height);
|
|
swapl(&stuff->planeMask);
|
|
swapl(&stuff->shmseg);
|
|
swapl(&stuff->offset);
|
|
return ProcShmGetImage(client);
|
|
}
|
|
|
|
static int _X_COLD
|
|
SProcShmCreatePixmap(ClientPtr client)
|
|
{
|
|
REQUEST(xShmCreatePixmapReq);
|
|
REQUEST_SIZE_MATCH(xShmCreatePixmapReq);
|
|
swapl(&stuff->pid);
|
|
swapl(&stuff->drawable);
|
|
swaps(&stuff->width);
|
|
swaps(&stuff->height);
|
|
swapl(&stuff->shmseg);
|
|
swapl(&stuff->offset);
|
|
return ProcShmCreatePixmap(client);
|
|
}
|
|
|
|
#ifdef SHM_FD_PASSING
|
|
static int _X_COLD
|
|
SProcShmAttachFd(ClientPtr client)
|
|
{
|
|
REQUEST(xShmAttachFdReq);
|
|
SetReqFds(client, 1);
|
|
REQUEST_SIZE_MATCH(xShmAttachFdReq);
|
|
swapl(&stuff->shmseg);
|
|
return ProcShmAttachFd(client);
|
|
}
|
|
|
|
static int _X_COLD
|
|
SProcShmCreateSegment(ClientPtr client)
|
|
{
|
|
REQUEST(xShmCreateSegmentReq);
|
|
REQUEST_SIZE_MATCH(xShmCreateSegmentReq);
|
|
swapl(&stuff->shmseg);
|
|
swapl(&stuff->size);
|
|
return ProcShmCreateSegment(client);
|
|
}
|
|
#endif /* SHM_FD_PASSING */
|
|
|
|
static int _X_COLD
|
|
SProcShmDispatch(ClientPtr client)
|
|
{
|
|
REQUEST(xReq);
|
|
|
|
switch (stuff->data) {
|
|
case X_ShmQueryVersion:
|
|
return ProcShmQueryVersion(client);
|
|
case X_ShmAttach:
|
|
return SProcShmAttach(client);
|
|
case X_ShmDetach:
|
|
return SProcShmDetach(client);
|
|
case X_ShmPutImage:
|
|
return SProcShmPutImage(client);
|
|
case X_ShmGetImage:
|
|
return SProcShmGetImage(client);
|
|
case X_ShmCreatePixmap:
|
|
return SProcShmCreatePixmap(client);
|
|
#ifdef SHM_FD_PASSING
|
|
case X_ShmAttachFd:
|
|
return SProcShmAttachFd(client);
|
|
case X_ShmCreateSegment:
|
|
return SProcShmCreateSegment(client);
|
|
#endif
|
|
default:
|
|
return BadRequest;
|
|
}
|
|
}
|
|
|
|
static void ShmPixmapDestroy(CallbackListPtr *pcbl, ScreenPtr pScreen, PixmapPtr pPixmap)
|
|
{
|
|
ShmDetachSegment(
|
|
dixLookupPrivate(&pPixmap->devPrivates, shmPixmapPrivateKey),
|
|
0);
|
|
dixSetPrivate(&pPixmap->devPrivates, shmPixmapPrivateKey, NULL);
|
|
}
|
|
|
|
void
|
|
ShmExtensionInit(void)
|
|
{
|
|
ExtensionEntry *extEntry;
|
|
int i;
|
|
|
|
#ifdef MUST_CHECK_FOR_SHM_SYSCALL
|
|
if (!CheckForShmSyscall()) {
|
|
ErrorF("MIT-SHM extension disabled due to lack of kernel support\n");
|
|
return;
|
|
}
|
|
#endif
|
|
|
|
if (!ShmRegisterPrivates())
|
|
return;
|
|
|
|
sharedPixmaps = xFalse;
|
|
{
|
|
sharedPixmaps = xTrue;
|
|
for (i = 0; i < screenInfo.numScreens; i++) {
|
|
ShmScrPrivateRec *screen_priv =
|
|
ShmInitScreenPriv(screenInfo.screens[i]);
|
|
if (!screen_priv)
|
|
continue;
|
|
if (!screen_priv->shmFuncs)
|
|
screen_priv->shmFuncs = &miFuncs;
|
|
if (!screen_priv->shmFuncs->CreatePixmap)
|
|
sharedPixmaps = xFalse;
|
|
}
|
|
if (sharedPixmaps)
|
|
for (i = 0; i < screenInfo.numScreens; i++)
|
|
dixScreenHookPixmapDestroy(screenInfo.screens[i], ShmPixmapDestroy);
|
|
}
|
|
ShmSegType = CreateNewResourceType(ShmDetachSegment, "ShmSeg");
|
|
if (ShmSegType &&
|
|
(extEntry = AddExtension(SHMNAME, ShmNumberEvents, ShmNumberErrors,
|
|
ProcShmDispatch, SProcShmDispatch,
|
|
ShmResetProc, StandardMinorOpcode))) {
|
|
ShmReqCode = (unsigned char) extEntry->base;
|
|
ShmCompletionCode = extEntry->eventBase;
|
|
BadShmSegCode = extEntry->errorBase;
|
|
SetResourceTypeErrorValue(ShmSegType, BadShmSegCode);
|
|
EventSwapVector[ShmCompletionCode] = (EventSwapPtr) SShmCompletionEvent;
|
|
}
|
|
}
|