Main changes: - COW optimization for safecopy. - safemap, a grant-based interface for sharing memory regions between processes. - Integration with safemap and complete rework of DS, supporting new data types natively (labels, memory ranges, memory mapped ranges). - For further information: http://wiki.minix3.org/en/SummerOfCode2009/MemoryGrants Additional changes not included in the original Wu's branch: - Fixed unhandled case in VM when using COW optimization for safecopy in case of a block that has already been shared as SMAP. - Better interface and naming scheme for sys_saferevmap and ds_retrieve_map calls. - Better input checking in syslib: check for page alignment when creating memory mapping grants. - DS notifies subscribers when an entry is deleted. - Documented the behavior of indirect grants in case of memory mapping. - Test suite in /usr/src/test/safeperf|safecopy|safemap|ds/* reworked and extended. - Minor fixes and general cleanup. - TO-DO: Grant ids should be generated and managed the way endpoints are to make sure grant slots are never misreused.
96 lines
2.3 KiB
C
96 lines
2.3 KiB
C
#include "inc.h"
|
|
|
|
char buf_buf[BUF_SIZE + CLICK_SIZE];
|
|
|
|
endpoint_t ep_granter;
|
|
int gid;
|
|
char *buf;
|
|
|
|
/*===========================================================================*
|
|
* test *
|
|
*===========================================================================*/
|
|
int test(size_t size)
|
|
{
|
|
u32_t low1, high1;
|
|
u32_t low2, high2;
|
|
int r;
|
|
|
|
/* Timing. */
|
|
read_tsc(&high1, &low1);
|
|
r = sys_safecopyfrom(ep_granter, gid, 0, (long)buf, size, D);
|
|
read_tsc(&high2, &low2);
|
|
if(r != OK) {
|
|
printf("REQUESTOR: error in safecopy: %d\n", r);
|
|
return r;
|
|
}
|
|
printf("REQUESTOR: SAFECOPY 0x%-8x - %d\n", size, low2 - low1);
|
|
|
|
/* Test. */
|
|
if(buf[0] != BUF_START) {
|
|
printf("REQUESTOR: error in safecopy!\n");
|
|
printf(" size, value: %d, %d\n", size, buf[0]);
|
|
return r;
|
|
}
|
|
|
|
return OK;
|
|
}
|
|
|
|
/* SEF functions and variables. */
|
|
FORWARD _PROTOTYPE( void sef_local_startup, (void) );
|
|
|
|
/*===========================================================================*
|
|
* main *
|
|
*===========================================================================*/
|
|
int main(int argc, char **argv)
|
|
{
|
|
endpoint_t ep_self;
|
|
int fid_send, fid_get;
|
|
int i;
|
|
|
|
/* SEF local startup. */
|
|
env_setargs(argc, argv);
|
|
sef_local_startup();
|
|
|
|
/* Prepare work. */
|
|
buf = (char*) CLICK_CEIL(buf_buf);
|
|
fid_get = open(FIFO_GRANTOR, O_RDONLY);
|
|
fid_send = open(FIFO_REQUESTOR, O_WRONLY);
|
|
if(fid_get < 0 || fid_send < 0) {
|
|
printf("REQUESTOR: can't open fifo files.\n");
|
|
return 1;
|
|
}
|
|
|
|
/* Sending the endpoint to the granter, in order to let him
|
|
* create the grant.
|
|
*/
|
|
ep_self = getprocnr();
|
|
write(fid_send, &ep_self, sizeof(ep_self));
|
|
dprint("REQUESTOR: sending my endpoint: %d\n", ep_self);
|
|
|
|
/* Getting the granter's endpoint and gid. */
|
|
read(fid_get, &ep_granter, sizeof(ep_granter));
|
|
read(fid_get, &gid, sizeof(gid));
|
|
dprint("REQUESTOR: getting granter's endpoint %d and gid %d\n",
|
|
ep_granter, gid);
|
|
|
|
/* Test SAFECOPY. */
|
|
for(i = 0; i <= TEST_PAGE_SHIFT; i++) {
|
|
if(test(1 << i) != OK)
|
|
break;
|
|
}
|
|
|
|
/* Notify grantor we are done. */
|
|
FIFO_NOTIFY(fid_send);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*===========================================================================*
|
|
* sef_local_startup *
|
|
*===========================================================================*/
|
|
PRIVATE void sef_local_startup()
|
|
{
|
|
/* Let SEF perform startup. */
|
|
sef_startup();
|
|
}
|
|
|