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usertests.c
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usertests.c
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#include "param.h"
#include "types.h"
#include "stat.h"
#include "user.h"
#include "fs.h"
#include "fcntl.h"
#include "syscall.h"
#include "traps.h"
#include "memlayout.h"
char buf[8192];
char name[3];
char *echoargv[] = { "echo", "ALL", "TESTS", "PASSED", 0 };
int stdout = 1;
// does chdir() call iput(p->cwd) in a transaction?
void
iputtest(void)
{
printf(stdout, "iput test\n");
if(mkdir("iputdir") < 0){
printf(stdout, "mkdir failed\n");
exit();
}
if(chdir("iputdir") < 0){
printf(stdout, "chdir iputdir failed\n");
exit();
}
if(unlink("../iputdir") < 0){
printf(stdout, "unlink ../iputdir failed\n");
exit();
}
if(chdir("/") < 0){
printf(stdout, "chdir / failed\n");
exit();
}
printf(stdout, "iput test ok\n");
}
// does exit() call iput(p->cwd) in a transaction?
void
exitiputtest(void)
{
int pid;
printf(stdout, "exitiput test\n");
pid = fork();
if(pid < 0){
printf(stdout, "fork failed\n");
exit();
}
if(pid == 0){
if(mkdir("iputdir") < 0){
printf(stdout, "mkdir failed\n");
exit();
}
if(chdir("iputdir") < 0){
printf(stdout, "child chdir failed\n");
exit();
}
if(unlink("../iputdir") < 0){
printf(stdout, "unlink ../iputdir failed\n");
exit();
}
exit();
}
wait();
printf(stdout, "exitiput test ok\n");
}
// does the error path in open() for attempt to write a
// directory call iput() in a transaction?
// needs a hacked kernel that pauses just after the namei()
// call in sys_open():
// if((ip = namei(path)) == 0)
// return -1;
// {
// int i;
// for(i = 0; i < 10000; i++)
// yield();
// }
void
openiputtest(void)
{
int pid;
printf(stdout, "openiput test\n");
if(mkdir("oidir") < 0){
printf(stdout, "mkdir oidir failed\n");
exit();
}
pid = fork();
if(pid < 0){
printf(stdout, "fork failed\n");
exit();
}
if(pid == 0){
int fd = open("oidir", O_RDWR);
if(fd >= 0){
printf(stdout, "open directory for write succeeded\n");
exit();
}
exit();
}
sleep(1);
if(unlink("oidir") != 0){
printf(stdout, "unlink failed\n");
exit();
}
wait();
printf(stdout, "openiput test ok\n");
}
// simple file system tests
void
opentest(void)
{
int fd;
printf(stdout, "open test\n");
fd = open("echo", 0);
if(fd < 0){
printf(stdout, "open echo failed!\n");
exit();
}
close(fd);
fd = open("doesnotexist", 0);
if(fd >= 0){
printf(stdout, "open doesnotexist succeeded!\n");
exit();
}
printf(stdout, "open test ok\n");
}
void
writetest(void)
{
int fd;
int i;
printf(stdout, "small file test\n");
fd = open("small", O_CREATE|O_RDWR);
if(fd >= 0){
printf(stdout, "creat small succeeded; ok\n");
} else {
printf(stdout, "error: creat small failed!\n");
exit();
}
for(i = 0; i < 100; i++){
if(write(fd, "aaaaaaaaaa", 10) != 10){
printf(stdout, "error: write aa %d new file failed\n", i);
exit();
}
if(write(fd, "bbbbbbbbbb", 10) != 10){
printf(stdout, "error: write bb %d new file failed\n", i);
exit();
}
}
printf(stdout, "writes ok\n");
close(fd);
fd = open("small", O_RDONLY);
if(fd >= 0){
printf(stdout, "open small succeeded ok\n");
} else {
printf(stdout, "error: open small failed!\n");
exit();
}
i = read(fd, buf, 2000);
if(i == 2000){
printf(stdout, "read succeeded ok\n");
} else {
printf(stdout, "read failed\n");
exit();
}
close(fd);
if(unlink("small") < 0){
printf(stdout, "unlink small failed\n");
exit();
}
printf(stdout, "small file test ok\n");
}
void
writetest1(void)
{
int i, fd, n;
printf(stdout, "big files test\n");
fd = open("big", O_CREATE|O_RDWR);
if(fd < 0){
printf(stdout, "error: creat big failed!\n");
exit();
}
for(i = 0; i < MAXFILE; i++){
((int*)buf)[0] = i;
if(write(fd, buf, 512) != 512){
printf(stdout, "error: write big file failed\n", i);
exit();
}
}
close(fd);
fd = open("big", O_RDONLY);
if(fd < 0){
printf(stdout, "error: open big failed!\n");
exit();
}
n = 0;
for(;;){
i = read(fd, buf, 512);
if(i == 0){
if(n == MAXFILE - 1){
printf(stdout, "read only %d blocks from big", n);
exit();
}
break;
} else if(i != 512){
printf(stdout, "read failed %d\n", i);
exit();
}
if(((int*)buf)[0] != n){
printf(stdout, "read content of block %d is %d\n",
n, ((int*)buf)[0]);
exit();
}
n++;
}
close(fd);
if(unlink("big") < 0){
printf(stdout, "unlink big failed\n");
exit();
}
printf(stdout, "big files ok\n");
}
void
createtest(void)
{
int i, fd;
printf(stdout, "many creates, followed by unlink test\n");
name[0] = 'a';
name[2] = '\0';
for(i = 0; i < 52; i++){
name[1] = '0' + i;
fd = open(name, O_CREATE|O_RDWR);
close(fd);
}
name[0] = 'a';
name[2] = '\0';
for(i = 0; i < 52; i++){
name[1] = '0' + i;
unlink(name);
}
printf(stdout, "many creates, followed by unlink; ok\n");
}
void dirtest(void)
{
printf(stdout, "mkdir test\n");
if(mkdir("dir0") < 0){
printf(stdout, "mkdir failed\n");
exit();
}
if(chdir("dir0") < 0){
printf(stdout, "chdir dir0 failed\n");
exit();
}
if(chdir("..") < 0){
printf(stdout, "chdir .. failed\n");
exit();
}
if(unlink("dir0") < 0){
printf(stdout, "unlink dir0 failed\n");
exit();
}
printf(stdout, "mkdir test ok\n");
}
void
exectest(void)
{
printf(stdout, "exec test\n");
if(exec("echo", echoargv) < 0){
printf(stdout, "exec echo failed\n");
exit();
}
}
// simple fork and pipe read/write
void
pipe1(void)
{
int fds[2], pid;
int seq, i, n, cc, total;
if(pipe(fds) != 0){
printf(1, "pipe() failed\n");
exit();
}
pid = fork();
seq = 0;
if(pid == 0){
close(fds[0]);
for(n = 0; n < 5; n++){
for(i = 0; i < 1033; i++)
buf[i] = seq++;
if(write(fds[1], buf, 1033) != 1033){
printf(1, "pipe1 oops 1\n");
exit();
}
}
exit();
} else if(pid > 0){
close(fds[1]);
total = 0;
cc = 1;
while((n = read(fds[0], buf, cc)) > 0){
for(i = 0; i < n; i++){
if((buf[i] & 0xff) != (seq++ & 0xff)){
printf(1, "pipe1 oops 2\n");
return;
}
}
total += n;
cc = cc * 2;
if(cc > sizeof(buf))
cc = sizeof(buf);
}
if(total != 5 * 1033){
printf(1, "pipe1 oops 3 total %d\n", total);
exit();
}
close(fds[0]);
wait();
} else {
printf(1, "fork() failed\n");
exit();
}
printf(1, "pipe1 ok\n");
}
// meant to be run w/ at most two CPUs
void
preempt(void)
{
int pid1, pid2, pid3;
int pfds[2];
printf(1, "preempt: ");
pid1 = fork();
if(pid1 == 0)
for(;;)
;
pid2 = fork();
if(pid2 == 0)
for(;;)
;
pipe(pfds);
pid3 = fork();
if(pid3 == 0){
close(pfds[0]);
if(write(pfds[1], "x", 1) != 1)
printf(1, "preempt write error");
close(pfds[1]);
for(;;)
;
}
close(pfds[1]);
if(read(pfds[0], buf, sizeof(buf)) != 1){
printf(1, "preempt read error");
return;
}
close(pfds[0]);
printf(1, "kill... ");
kill(pid1);
kill(pid2);
kill(pid3);
printf(1, "wait... ");
wait();
wait();
wait();
printf(1, "preempt ok\n");
}
// try to find any races between exit and wait
void
exitwait(void)
{
int i, pid;
for(i = 0; i < 100; i++){
pid = fork();
if(pid < 0){
printf(1, "fork failed\n");
return;
}
if(pid){
if(wait() != pid){
printf(1, "wait wrong pid\n");
return;
}
} else {
exit();
}
}
printf(1, "exitwait ok\n");
}
void
mem(void)
{
void *m1, *m2;
int pid, ppid;
printf(1, "mem test\n");
ppid = getpid();
if((pid = fork()) == 0){
m1 = 0;
while((m2 = malloc(10001)) != 0){
*(char**)m2 = m1;
m1 = m2;
}
while(m1){
m2 = *(char**)m1;
free(m1);
m1 = m2;
}
m1 = malloc(1024*20);
if(m1 == 0){
printf(1, "couldn't allocate mem?!!\n");
kill(ppid);
exit();
}
free(m1);
printf(1, "mem ok\n");
exit();
} else {
wait();
}
}
// More file system tests
// two processes write to the same file descriptor
// is the offset shared? does inode locking work?
void
sharedfd(void)
{
int fd, pid, i, n, nc, np;
char buf[10];
printf(1, "sharedfd test\n");
unlink("sharedfd");
fd = open("sharedfd", O_CREATE|O_RDWR);
if(fd < 0){
printf(1, "fstests: cannot open sharedfd for writing");
return;
}
pid = fork();
memset(buf, pid==0?'c':'p', sizeof(buf));
for(i = 0; i < 1000; i++){
if(write(fd, buf, sizeof(buf)) != sizeof(buf)){
printf(1, "fstests: write sharedfd failed\n");
break;
}
}
if(pid == 0)
exit();
else
wait();
close(fd);
fd = open("sharedfd", 0);
if(fd < 0){
printf(1, "fstests: cannot open sharedfd for reading\n");
return;
}
nc = np = 0;
while((n = read(fd, buf, sizeof(buf))) > 0){
for(i = 0; i < sizeof(buf); i++){
if(buf[i] == 'c')
nc++;
if(buf[i] == 'p')
np++;
}
}
close(fd);
unlink("sharedfd");
if(nc == 10000 && np == 10000){
printf(1, "sharedfd ok\n");
} else {
printf(1, "sharedfd oops %d %d\n", nc, np);
exit();
}
}
// four processes write different files at the same
// time, to test block allocation.
void
fourfiles(void)
{
int fd, pid, i, j, n, total, pi;
char *names[] = { "f0", "f1", "f2", "f3" };
char *fname;
printf(1, "fourfiles test\n");
for(pi = 0; pi < 4; pi++){
fname = names[pi];
unlink(fname);
pid = fork();
if(pid < 0){
printf(1, "fork failed\n");
exit();
}
if(pid == 0){
fd = open(fname, O_CREATE | O_RDWR);
if(fd < 0){
printf(1, "create failed\n");
exit();
}
memset(buf, '0'+pi, 512);
for(i = 0; i < 12; i++){
if((n = write(fd, buf, 500)) != 500){
printf(1, "write failed %d\n", n);
exit();
}
}
exit();
}
}
for(pi = 0; pi < 4; pi++){
wait();
}
for(i = 0; i < 2; i++){
fname = names[i];
fd = open(fname, 0);
total = 0;
while((n = read(fd, buf, sizeof(buf))) > 0){
for(j = 0; j < n; j++){
if(buf[j] != '0'+i){
printf(1, "wrong char\n");
exit();
}
}
total += n;
}
close(fd);
if(total != 12*500){
printf(1, "wrong length %d\n", total);
exit();
}
unlink(fname);
}
printf(1, "fourfiles ok\n");
}
// four processes create and delete different files in same directory
void
createdelete(void)
{
enum { N = 20 };
int pid, i, fd, pi;
char name[32];
printf(1, "createdelete test\n");
for(pi = 0; pi < 4; pi++){
pid = fork();
if(pid < 0){
printf(1, "fork failed\n");
exit();
}
if(pid == 0){
name[0] = 'p' + pi;
name[2] = '\0';
for(i = 0; i < N; i++){
name[1] = '0' + i;
fd = open(name, O_CREATE | O_RDWR);
if(fd < 0){
printf(1, "create failed\n");
exit();
}
close(fd);
if(i > 0 && (i % 2 ) == 0){
name[1] = '0' + (i / 2);
if(unlink(name) < 0){
printf(1, "unlink failed\n");
exit();
}
}
}
exit();
}
}
for(pi = 0; pi < 4; pi++){
wait();
}
name[0] = name[1] = name[2] = 0;
for(i = 0; i < N; i++){
for(pi = 0; pi < 4; pi++){
name[0] = 'p' + pi;
name[1] = '0' + i;
fd = open(name, 0);
if((i == 0 || i >= N/2) && fd < 0){
printf(1, "oops createdelete %s didn't exist\n", name);
exit();
} else if((i >= 1 && i < N/2) && fd >= 0){
printf(1, "oops createdelete %s did exist\n", name);
exit();
}
if(fd >= 0)
close(fd);
}
}
for(i = 0; i < N; i++){
for(pi = 0; pi < 4; pi++){
name[0] = 'p' + i;
name[1] = '0' + i;
unlink(name);
}
}
printf(1, "createdelete ok\n");
}
// can I unlink a file and still read it?
void
unlinkread(void)
{
int fd, fd1;
printf(1, "unlinkread test\n");
fd = open("unlinkread", O_CREATE | O_RDWR);
if(fd < 0){
printf(1, "create unlinkread failed\n");
exit();
}
write(fd, "hello", 5);
close(fd);
fd = open("unlinkread", O_RDWR);
if(fd < 0){
printf(1, "open unlinkread failed\n");
exit();
}
if(unlink("unlinkread") != 0){
printf(1, "unlink unlinkread failed\n");
exit();
}
fd1 = open("unlinkread", O_CREATE | O_RDWR);
write(fd1, "yyy", 3);
close(fd1);
if(read(fd, buf, sizeof(buf)) != 5){
printf(1, "unlinkread read failed");
exit();
}
if(buf[0] != 'h'){
printf(1, "unlinkread wrong data\n");
exit();
}
if(write(fd, buf, 10) != 10){
printf(1, "unlinkread write failed\n");
exit();
}
close(fd);
unlink("unlinkread");
printf(1, "unlinkread ok\n");
}
void
linktest(void)
{
int fd;
printf(1, "linktest\n");
unlink("lf1");
unlink("lf2");
fd = open("lf1", O_CREATE|O_RDWR);
if(fd < 0){
printf(1, "create lf1 failed\n");
exit();
}
if(write(fd, "hello", 5) != 5){
printf(1, "write lf1 failed\n");
exit();
}
close(fd);
if(link("lf1", "lf2") < 0){
printf(1, "link lf1 lf2 failed\n");
exit();
}
unlink("lf1");
if(open("lf1", 0) >= 0){
printf(1, "unlinked lf1 but it is still there!\n");
exit();
}
fd = open("lf2", 0);
if(fd < 0){
printf(1, "open lf2 failed\n");
exit();
}
if(read(fd, buf, sizeof(buf)) != 5){
printf(1, "read lf2 failed\n");
exit();
}
close(fd);
if(link("lf2", "lf2") >= 0){
printf(1, "link lf2 lf2 succeeded! oops\n");
exit();
}
unlink("lf2");
if(link("lf2", "lf1") >= 0){
printf(1, "link non-existant succeeded! oops\n");
exit();
}
if(link(".", "lf1") >= 0){
printf(1, "link . lf1 succeeded! oops\n");
exit();
}
printf(1, "linktest ok\n");
}
// test concurrent create/link/unlink of the same file
void
concreate(void)
{
char file[3];
int i, pid, n, fd;
char fa[40];
struct {
ushort inum;
char name[14];
} de;
printf(1, "concreate test\n");
file[0] = 'C';
file[2] = '\0';
for(i = 0; i < 40; i++){
file[1] = '0' + i;
unlink(file);
pid = fork();
if(pid && (i % 3) == 1){
link("C0", file);
} else if(pid == 0 && (i % 5) == 1){
link("C0", file);
} else {
fd = open(file, O_CREATE | O_RDWR);
if(fd < 0){
printf(1, "concreate create %s failed\n", file);
exit();
}
close(fd);
}
if(pid == 0)
exit();
else
wait();
}
memset(fa, 0, sizeof(fa));
fd = open(".", 0);
n = 0;
while(read(fd, &de, sizeof(de)) > 0){
if(de.inum == 0)
continue;
if(de.name[0] == 'C' && de.name[2] == '\0'){
i = de.name[1] - '0';
if(i < 0 || i >= sizeof(fa)){
printf(1, "concreate weird file %s\n", de.name);
exit();
}
if(fa[i]){
printf(1, "concreate duplicate file %s\n", de.name);
exit();
}
fa[i] = 1;
n++;
}
}
close(fd);
if(n != 40){
printf(1, "concreate not enough files in directory listing\n");
exit();
}
for(i = 0; i < 40; i++){
file[1] = '0' + i;
pid = fork();
if(pid < 0){
printf(1, "fork failed\n");
exit();
}
if(((i % 3) == 0 && pid == 0) ||
((i % 3) == 1 && pid != 0)){
close(open(file, 0));
close(open(file, 0));
close(open(file, 0));
close(open(file, 0));
} else {
unlink(file);
unlink(file);
unlink(file);
unlink(file);
}
if(pid == 0)
exit();
else
wait();
}
printf(1, "concreate ok\n");
}
// another concurrent link/unlink/create test,
// to look for deadlocks.
void
linkunlink()
{
int pid, i;
printf(1, "linkunlink test\n");
unlink("x");
pid = fork();
if(pid < 0){
printf(1, "fork failed\n");
exit();
}
unsigned int x = (pid ? 1 : 97);
for(i = 0; i < 100; i++){
x = x * 1103515245 + 12345;
if((x % 3) == 0){
close(open("x", O_RDWR | O_CREATE));
} else if((x % 3) == 1){
link("cat", "x");
} else {
unlink("x");
}
}
if(pid)
wait();
else
exit();
printf(1, "linkunlink ok\n");
}
// directory that uses indirect blocks
void
bigdir(void)
{
int i, fd;
char name[10];
printf(1, "bigdir test\n");
unlink("bd");
fd = open("bd", O_CREATE);
if(fd < 0){
printf(1, "bigdir create failed\n");
exit();
}
close(fd);
for(i = 0; i < 500; i++){
name[0] = 'x';
name[1] = '0' + (i / 64);
name[2] = '0' + (i % 64);
name[3] = '\0';
if(link("bd", name) != 0){
printf(1, "bigdir link failed\n");
exit();
}
}
unlink("bd");
for(i = 0; i < 500; i++){
name[0] = 'x';
name[1] = '0' + (i / 64);
name[2] = '0' + (i % 64);
name[3] = '\0';
if(unlink(name) != 0){
printf(1, "bigdir unlink failed");
exit();
}
}
printf(1, "bigdir ok\n");
}
void
subdir(void)
{
int fd, cc;
printf(1, "subdir test\n");
unlink("ff");
if(mkdir("dd") != 0){
printf(1, "subdir mkdir dd failed\n");
exit();
}
fd = open("dd/ff", O_CREATE | O_RDWR);
if(fd < 0){
printf(1, "create dd/ff failed\n");
exit();
}
write(fd, "ff", 2);
close(fd);
if(unlink("dd") >= 0){
printf(1, "unlink dd (non-empty dir) succeeded!\n");
exit();
}
if(mkdir("/dd/dd") != 0){
printf(1, "subdir mkdir dd/dd failed\n");
exit();
}
fd = open("dd/dd/ff", O_CREATE | O_RDWR);
if(fd < 0){
printf(1, "create dd/dd/ff failed\n");
exit();
}
write(fd, "FF", 2);
close(fd);
fd = open("dd/dd/../ff", 0);
if(fd < 0){
printf(1, "open dd/dd/../ff failed\n");
exit();
}
cc = read(fd, buf, sizeof(buf));
if(cc != 2 || buf[0] != 'f'){
printf(1, "dd/dd/../ff wrong content\n");
exit();
}
close(fd);
if(link("dd/dd/ff", "dd/dd/ffff") != 0){
printf(1, "link dd/dd/ff dd/dd/ffff failed\n");
exit();
}
if(unlink("dd/dd/ff") != 0){
printf(1, "unlink dd/dd/ff failed\n");
exit();
}
if(open("dd/dd/ff", O_RDONLY) >= 0){
printf(1, "open (unlinked) dd/dd/ff succeeded\n");
exit();
}
if(chdir("dd") != 0){
printf(1, "chdir dd failed\n");