minix/test/testvm.c

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/* testvm - service-started code that goes with test73.o
*/
#include <minix/drivers.h>
#include <minix/chardriver.h>
#include <minix/ds.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include "testvm.h"
#include "common.h"
#include "testcache.h"
#define MYMAJOR 40 /* doesn't really matter, shouldn't be NO_DEV though */
#define MYDEV makedev(MYMAJOR, 1)
static char *pipefilename = NULL, *progname;
int pipefd = -1;
int memfd;
static char *bdata = NULL;
int dowriteblock(int b, int blocksize, u32_t seed, char *block)
{
int r;
char *bdata;
int mustset = 0;
u64_t dev_off = (u64_t) b * blocksize;
if((bdata = vm_map_cacheblock(MYDEV, dev_off,
VMC_NO_INODE, 0, NULL, blocksize)) == MAP_FAILED) {
if((bdata = mmap(0, blocksize,
PROT_READ|PROT_WRITE, MAP_ANON, -1, 0)) == MAP_FAILED) {
printf("mmap failed\n");
exit(1);
}
mustset = 1;
}
memcpy(bdata, block, blocksize);
if(mustset && (r=vm_set_cacheblock(bdata, MYDEV, dev_off,
VMC_NO_INODE, 0, NULL, blocksize)) != OK) {
printf("dowriteblock: vm_set_cacheblock failed %d\n", r);
exit(1);
}
if(munmap(bdata, blocksize) < 0) {
printf("dowriteblock: munmap failed %d\n", r);
exit(1);
}
return blocksize;
}
int readblock(int b, int blocksize, u32_t seed, char *block)
{
char *bdata;
u64_t dev_off = (u64_t) b * blocksize;
if((bdata = vm_map_cacheblock(MYDEV, dev_off,
VMC_NO_INODE, 0, NULL, blocksize)) == MAP_FAILED) {
return OK_BLOCK_GONE;
}
memcpy(block, bdata, blocksize);
if(munmap(bdata, blocksize) < 0) {
printf("dowriteblock: munmap failed\n");
exit(1);
}
return blocksize;
}
void testend(void) { }
static void
writepipe(struct info *i)
{
if(write(pipefd, i, sizeof(*i)) != sizeof(*i)) {
printf("%s: pipe write failed\n", progname);
exit(1);
}
}
static int
testinit(void)
{
struct stat st;
int attempts = 0;
for(attempts = 0; attempts < 5 && pipefd < 0; attempts++) {
if(attempts > 0) sleep(1);
pipefd = open(pipefilename, O_WRONLY | O_NONBLOCK);
}
if(pipefd < 0) {
printf("%s: could not open pipe %s, errno %d\n",
progname, pipefilename, errno);
exit(1);
}
if(fstat(pipefd, &st) < 0) {
printf("%s: could not fstat pipe %s\n", progname, pipefilename);
exit(1);
}
if(!(st.st_mode & I_NAMED_PIPE)) {
printf("%s: file %s is not a pipe\n", progname, pipefilename);
exit(1);
}
return OK;
}
static int
sef_cb_init(int type, sef_init_info_t *UNUSED(info))
{
return OK;
}
static void
init(void)
{
/* SEF init */
sef_setcb_init_fresh(sef_cb_init);
sef_setcb_init_lu(sef_cb_init);
sef_setcb_init_restart(sef_cb_init);
sef_startup();
}
int
main(int argc, char *argv[])
{
struct info info;
int big;
u32_t totalmem, freemem, cachedmem;
progname = argv[0];
if(argc < 2) { printf("no args\n"); return 1; }
pipefilename=argv[1];
big = !!strstr(pipefilename, "big");
init();
info.result = time(NULL);
if(testinit() != OK) { printf("%s: testinit failed\n", progname); return 1; }
cachequiet(!big);
if(!(bdata = alloc_contig(PAGE_SIZE, 0, NULL))) {
printf("could not allocate block\n");
exit(1);
}
if(dotest(PAGE_SIZE, 10, 3)) { e(11); exit(1); }
if(dotest(PAGE_SIZE, 1000, 3)) { e(11); exit(1); }
if(dotest(PAGE_SIZE, 50000, 3)) { e(11); exit(1); }
if(big) {
getmem(&totalmem, &freemem, &cachedmem);
if(dotest(PAGE_SIZE, totalmem*1.5, 3)) { e(11); exit(1); }
}
info.result = 0;
writepipe(&info);
vm_clear_cache(MYDEV);
return 0;
}