Keep track of error statistics, rate limit debug output, added SYS_MAPDMA.

diff --git a/kernel/system.c b/kernel/system.c
index b527a8eb8d95a355ac19b09b463f8c2990046792..16541711b7640ec5637f49722acdfbc12d07b870 100755 (executable)
--- a/kernel/system.c
+++ b/kernel/system.c
@@ -37,6 +37,7 @@
 #include <sys/sigcontext.h>
 #include <minix/endpoint.h>
 #include <minix/safecopies.h>
+#include <minix/u64.h>
 
 /* Declaration of the call vector that defines the mapping of system calls 
  * to handler functions. The vector is initialized in sys_init() with map(), 
@@ -77,19 +78,37 @@ PUBLIC void sys_task()
       okendpt(who_e, &who_p);
       caller_ptr = proc_addr(who_p);
 
+       if (caller_ptr->p_endpoint == ipc_stats_target)
+               sys_stats.total= add64u(sys_stats.total, 1);
+
       /* See if the caller made a valid request and try to handle it. */
       if (call_nr < 0 || call_nr >= NR_SYS_CALLS) {    /* check call number */
 #if DEBUG_ENABLE_IPC_WARNINGS
          kprintf("SYSTEM: illegal request %d from %d.\n",
                call_nr,m.m_source);
 #endif
+       if (caller_ptr->p_endpoint == ipc_stats_target)
+               sys_stats.bad_req++;
          result = EBADREQUEST;                 /* illegal message type */
       } 
       else if (!GET_BIT(priv(caller_ptr)->s_k_call_mask, call_nr)) {
 #if DEBUG_ENABLE_IPC_WARNINGS
-         kprintf("SYSTEM: request %d from %d denied.\n",
-               call_nr,m.m_source);
+       static int curr= 0, limit= 100, extra= 20;
+
+       if (curr < limit+extra)
+       {
+               kprintf("SYSTEM: request %d from %d denied.\n",
+                       call_nr, m.m_source);
+       } else if (curr == limit+extra)
+       {
+               kprintf("sys_task: no debug output for a while\n");
+       }
+       else if (curr == 2*limit-1)
+               limit *= 2;
+       curr++;
 #endif
+       if (caller_ptr->p_endpoint == ipc_stats_target)
+               sys_stats.not_allowed++;
          result = ECALLDENIED;                 /* illegal message type */
       }
       else {
@@ -194,6 +213,7 @@ PRIVATE void initialize(void)
   map(SYS_READBIOS, do_readbios);      /* read from BIOS locations */
   map(SYS_IOPENABLE, do_iopenable);    /* Enable I/O */
   map(SYS_SDEVIO, do_sdevio);          /* phys_insb, _insw, _outsb, _outsw */
+  map(SYS_MAPDMA, do_mapdma);          
 #endif
 }