* OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS,
* OR MODIFICATIONS.
*
- * $Id: ppp_comp.c,v 1.5 1996/08/28 06:36:30 paulus Exp $
+ * $Id: ppp_comp.c,v 1.8 1997/04/30 05:45:15 paulus Exp $
*/
/*
#include <sys/ddi.h>
#else
#include <sys/user.h>
+#ifdef __osf__
+#include <sys/cmn_err.h>
+#endif
#endif /* SVR4 */
#include <net/ppp_defs.h>
#define PPP_COMP_ID 0xbadf
static struct module_info minfo = {
+#ifdef PRIOQ
+ PPP_COMP_ID, "ppp_comp", 0, INFPSZ, 16512, 16384,
+#else
PPP_COMP_ID, "ppp_comp", 0, INFPSZ, 16384, 4096,
+#endif
};
static struct qinit r_init = {
ppp_comp_wput, ppp_comp_wsrv, NULL, NULL, NULL, &minfo, NULL
};
+#if defined(SVR4) && !defined(SOL2)
+int pcmpdevflag = 0;
+#define ppp_compinfo pcmpinfo
+#endif
struct streamtab ppp_compinfo = {
&r_init, &w_init, NULL, NULL
};
static void ppp_comp_alloc __P((comp_state_t *));
typedef struct memreq {
- unsigned char *comp;
- void *mem;
- int len;
+ unsigned char comp_opts[20];
int cmd;
- int ret;
+ int thread_status;
+ char *returned_mem;
} memreq_t;
#endif
* List of compressors we know about.
*/
+#if DO_BSD_COMPRESS
extern struct compressor ppp_bsd_compress;
+#endif
+#if DO_DEFLATE
extern struct compressor ppp_deflate;
+#endif
struct compressor *ppp_compressors[] = {
#if DO_BSD_COMPRESS
WR(q)->q_ptr = q->q_ptr = (caddr_t) cp;
bzero((caddr_t)cp, sizeof(comp_state_t));
cp->mru = PPP_MRU;
- cp->mtu = PPP_MRU;
+ cp->mtu = PPP_MTU;
cp->xstate = NULL;
cp->rstate = NULL;
vj_compress_init(&cp->vj_comp, -1);
if (!cp->thread)
printf("ppp_comp_close: NULL thread!\n");
else
- thread_deallocate(cp->thread);
+ thread_terminate(cp->thread);
#endif
FREE(cp, sizeof(comp_state_t));
q->q_ptr = NULL;
static void
ppp_comp_alloc(comp_state_t *cp)
{
- unsigned char *opt_data;
int len, cmd;
- struct compressor *comp;
+ unsigned char *compressor_options;
thread_t thread;
+ void *(*comp_allocator)();
+
-#if (MAJOR_VERSION <= 2)
+#if defined(MAJOR_VERSION) && (MAJOR_VERSION <= 2)
/* In 2.x and earlier the argument gets passed
* in the thread structure itself. Yuck.
#endif
for (;;) {
- assert_wait((vm_offset_t)&cp->memreq.comp, TRUE);
+ assert_wait((vm_offset_t)&cp->memreq.thread_status, TRUE);
thread_block();
- opt_data = cp->memreq.comp;
- len = cp->memreq.len;
- cmd = cp->memreq.cmd;
- if (cmd == PPPIO_XCOMP) {
- comp = cp->xcomp;
- cp->memreq.mem = (*comp->comp_alloc)(opt_data, len);
+ if (thread_should_halt(current_thread()))
+ thread_halt_self();
+ cmd = cp->memreq.cmd;
+ compressor_options = &cp->memreq.comp_opts[0];
+ len = compressor_options[1];
+ if (cmd == PPPIO_XCOMP) {
+ cp->memreq.returned_mem = cp->xcomp->comp_alloc(compressor_options, len);
+ if (!cp->memreq.returned_mem) {
+ cp->memreq.thread_status = ENOSR;
+ } else {
+ cp->memreq.thread_status = 0;
+ }
} else {
- comp = cp->rcomp;
- cp->memreq.mem = (*comp->decomp_alloc)(opt_data, len);
+ cp->memreq.returned_mem = cp->rcomp->decomp_alloc(compressor_options, len);
+ if (!cp->memreq.returned_mem) {
+ cp->memreq.thread_status = ENOSR;
+ } else {
+ cp->memreq.thread_status = 0;
+ }
}
- if (!cp->memreq.mem)
- cp->memreq.ret = ENOSR;
- else
- bcopy(opt_data, cp->memreq.mem, len);
-
- /* have to free thunk here, since there's
- * no guarantee that the user will call the ioctl
- * again if we've taken a long time to complete
- */
- FREE(opt_data, len);
- cp->memreq.ret = 0;
}
}
if ((*comp)->compress_proto == opt_data[0]) {
/* here's the handler! */
error = 0;
+#ifndef __osf__
if (iop->ioc_cmd == PPPIO_XCOMP) {
-
/* A previous call may have fetched memory for a compressor
* that's now being retired or reset. Free it using it's
* mechanism for freeing stuff.
(*cp->xcomp->comp_free)(cp->xstate);
cp->xstate = NULL;
}
-
-#ifdef __osf__
- /* Account for an orpahned call to get memory.
- * Free that memory up and go on.
- *
- * The trick is that we need to be able to tell
- * the difference between an old call that kicked
- * off a thread where the memory was subsequently
- * orphaned, and the memory we're really interested
- * in. The thread helps by stamping the memory it
- * allocated with the parameters for the compressor
- * it belongs to. If the parameters match then this
- * is the memory we want (whether it was an actual
- * orphan or not we don't care.) If the parameters
- * don't match then this is an orphan.
- *
- * Note that cp->memreq.ret is the synchronization
- * point: we set it to EAGAIN in this function, then
- * wait for the thread to set it to something other
- * than EAGAIN before we fool with the data structure
- * again. Basically, if ret != EAGAIN then the thread
- * is working and it owns the memreq struture.
+ cp->xcomp = *comp;
+ cp->xstate = (*comp)->comp_alloc(opt_data, len);
+ if (cp->xstate == NULL)
+ error = ENOSR;
+ } else {
+ if (cp->rstate != NULL) {
+ (*cp->rcomp->decomp_free)(cp->rstate);
+ cp->rstate = NULL;
+ }
+ cp->rcomp = *comp;
+ cp->rstate = (*comp)->decomp_alloc(opt_data, len);
+ if (cp->rstate == NULL)
+ error = ENOSR;
+ }
+#else
+ if ((error = cp->memreq.thread_status) != EAGAIN)
+ if (iop->ioc_cmd == PPPIO_XCOMP) {
+ if (cp->xstate) {
+ (*cp->xcomp->comp_free)(cp->xstate);
+ cp->xstate = 0;
+ }
+ /* sanity check for compressor options
*/
- if (cp->memreq.ret == 0 && cp->memreq.mem != NULL &&
- bcmp(cp->memreq.mem, opt_data, len)) {
- (*cp->xcomp->comp_free)(cp->memreq.mem);
- cp->memreq.mem = 0;
+ if (sizeof (cp->memreq.comp_opts) < len) {
+ printf("can't handle options for compressor %d (%d)\n", opt_data[0],
+ opt_data[1]);
+ cp->memreq.thread_status = ENOSR;
+ cp->memreq.returned_mem = 0;
}
-
- /* First time through, prime the pump and kick
- * off the thread. Subsequent times though, the thread
- * is either busy (ret == EAGAIN) or finsihed (mem != NULL)
- * || (ret != 0)
+ /* fill in request for the thread and kick it off
*/
- if (cp->memreq.ret == 0 && cp->memreq.mem == NULL) {
- cp->memreq.comp = ALLOC_NOSLEEP(len);
- if (!cp->memreq.comp) {
- printf("gack! can't get memory for thunk\n");
- return ENOSR;
- }
- bcopy(opt_data, cp->memreq.comp, len);
- cp->memreq.len = len;
+ if (cp->memreq.thread_status == 0 && !cp->memreq.returned_mem) {
+ bcopy(opt_data, cp->memreq.comp_opts, len);
cp->memreq.cmd = PPPIO_XCOMP;
cp->xcomp = *comp;
- cp->memreq.ret = EAGAIN;
- thread_wakeup((vm_offset_t)&cp->memreq.comp);
- }
-
- /* Collect results from the thread, and reset the
- * mechanism for the next attempt to allocate memory
- * If the thread isn't finished (ret == EAGAIN) then
- * don't reset and just return.
- */
- if ((error = cp->memreq.ret) != EAGAIN) {
- cp->xstate = cp->memreq.mem;
- cp->memreq.mem = 0;
- cp->memreq.ret = 0;
+ error = cp->memreq.thread_status = EAGAIN;
+ thread_wakeup((vm_offset_t)&cp->memreq.thread_status);
+ } else {
+ cp->xstate = cp->memreq.returned_mem;
+ cp->memreq.returned_mem = 0;
+ cp->memreq.thread_status = 0;
}
-#else
- cp->xcomp = *comp;
- cp->xstate = (*comp)->comp_alloc(opt_data, len);
- if (cp->xstate == NULL)
- error = ENOSR;
-#endif
} else {
- if (cp->rstate != NULL) {
+ if (cp->rstate) {
(*cp->rcomp->decomp_free)(cp->rstate);
cp->rstate = NULL;
}
-#ifdef __osf__
- if (cp->memreq.ret == 0 && cp->memreq.mem != NULL &&
- bcmp(cp->memreq.mem, opt_data, len)) {
- (*cp->rcomp->comp_free)(cp->memreq.mem);
- cp->memreq.mem = 0;
+ if (sizeof (cp->memreq.comp_opts) < len) {
+ printf("can't handle options for compressor %d (%d)\n", opt_data[0],
+ opt_data[1]);
+ cp->memreq.thread_status = ENOSR;
+ cp->memreq.returned_mem = 0;
}
- if (cp->memreq.ret == 0 && cp->memreq.mem == NULL) {
- cp->memreq.comp = ALLOC_NOSLEEP(len);
- if (!cp->memreq.comp) {
- printf("gack! can't get memory for thunk\n");
- return ENOSR;
- }
- bcopy(opt_data, cp->memreq.comp, len);
- cp->memreq.len = len;
+ if (cp->memreq.thread_status == 0 && !cp->memreq.returned_mem) {
+ bcopy(opt_data, cp->memreq.comp_opts, len);
cp->memreq.cmd = PPPIO_RCOMP;
cp->rcomp = *comp;
- cp->memreq.ret = EAGAIN;
- thread_wakeup((vm_offset_t)&cp->memreq.comp);
+ error = cp->memreq.thread_status = EAGAIN;
+ thread_wakeup((vm_offset_t)&cp->memreq.thread_status);
+ } else {
+ cp->rstate = cp->memreq.returned_mem;
+ cp->memreq.returned_mem = 0;
+ cp->memreq.thread_status = 0;
}
- if ((error = cp->memreq.ret) != EAGAIN) {
- cp->rstate = cp->memreq.mem;
- cp->memreq.mem = 0;
- cp->memreq.ret = 0;
- }
-#else
- cp->rcomp = *comp;
- cp->rstate = (*comp)->decomp_alloc(opt_data, len);
- if (cp->rstate == NULL)
- error = ENOSR;
-#endif
}
+#endif
break;
}
iop->ioc_count = 0;
cp = (comp_state_t *) q->q_ptr;
while ((mp = getq(q)) != 0) {
/* assert(mp->b_datap->db_type == M_DATA) */
- if (!canputnext(q)) {
+#ifdef PRIOQ
+ if (!bcanputnext(q,mp->b_band)) {
+#else
+ if (!canputnext(q)) {
+#endif PRIOQ
putbq(q, mp);
return;
}
(*cp->xcomp->compress)(cp->xstate, &cmp, mp, len,
(cp->flags & CCP_ISUP? cp->mtu: 0));
if (cmp != NULL) {
+#ifdef PRIOQ
+ cmp->b_band=mp->b_band;
+#endif PRIOQ
freemsg(mp);
mp = cmp;
}
projects / ppp.git / blobdiff