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-rw-r--r--user/usertests.c1789
1 files changed, 1789 insertions, 0 deletions
diff --git a/user/usertests.c b/user/usertests.c
new file mode 100644
index 0000000..beca8f9
--- /dev/null
+++ b/user/usertests.c
@@ -0,0 +1,1789 @@
+#include "kernel/param.h"
+#include "kernel/types.h"
+#include "kernel/stat.h"
+#include "user/user.h"
+#include "kernel/fs.h"
+#include "kernel/fcntl.h"
+#include "kernel/syscall.h"
+#include "kernel/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) {
+ printf(1, "fork failed");
+ exit();
+ }
+ if(pid1 == 0)
+ for(;;)
+ ;
+
+ pid2 = fork();
+ if(pid2 < 0) {
+ printf(1, "fork failed\n");
+ exit();
+ }
+ if(pid2 == 0)
+ for(;;)
+ ;
+
+ pipe(pfds);
+ pid3 = fork();
+ if(pid3 < 0) {
+ printf(1, "fork failed\n");
+ exit();
+ }
+ 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, NCHILD=4 };
+ int pid, i, fd, pi;
+ char name[32];
+
+ printf(1, "createdelete test\n");
+
+ for(pi = 0; pi < NCHILD; 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 < NCHILD; pi++){
+ wait();
+ }
+
+ name[0] = name[1] = name[2] = 0;
+ for(i = 0; i < N; i++){
+ for(pi = 0; pi < NCHILD; 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 < NCHILD; 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");
+ exit();
+ }
+ if(chdir("dd/../../dd") != 0){
+ printf(1, "chdir dd/../../dd failed\n");
+ exit();
+ }
+ if(chdir("dd/../../../dd") != 0){
+ printf(1, "chdir dd/../../dd failed\n");
+ exit();
+ }
+ if(chdir("./..") != 0){
+ printf(1, "chdir ./.. failed\n");
+ exit();
+ }
+
+ fd = open("dd/dd/ffff", 0);
+ if(fd < 0){
+ printf(1, "open dd/dd/ffff failed\n");
+ exit();
+ }
+ if(read(fd, buf, sizeof(buf)) != 2){
+ printf(1, "read dd/dd/ffff wrong len\n");
+ exit();
+ }
+ close(fd);
+
+ if(open("dd/dd/ff", O_RDONLY) >= 0){
+ printf(1, "open (unlinked) dd/dd/ff succeeded!\n");
+ exit();
+ }
+
+ if(open("dd/ff/ff", O_CREATE|O_RDWR) >= 0){
+ printf(1, "create dd/ff/ff succeeded!\n");
+ exit();
+ }
+ if(open("dd/xx/ff", O_CREATE|O_RDWR) >= 0){
+ printf(1, "create dd/xx/ff succeeded!\n");
+ exit();
+ }
+ if(open("dd", O_CREATE) >= 0){
+ printf(1, "create dd succeeded!\n");
+ exit();
+ }
+ if(open("dd", O_RDWR) >= 0){
+ printf(1, "open dd rdwr succeeded!\n");
+ exit();
+ }
+ if(open("dd", O_WRONLY) >= 0){
+ printf(1, "open dd wronly succeeded!\n");
+ exit();
+ }
+ if(link("dd/ff/ff", "dd/dd/xx") == 0){
+ printf(1, "link dd/ff/ff dd/dd/xx succeeded!\n");
+ exit();
+ }
+ if(link("dd/xx/ff", "dd/dd/xx") == 0){
+ printf(1, "link dd/xx/ff dd/dd/xx succeeded!\n");
+ exit();
+ }
+ if(link("dd/ff", "dd/dd/ffff") == 0){
+ printf(1, "link dd/ff dd/dd/ffff succeeded!\n");
+ exit();
+ }
+ if(mkdir("dd/ff/ff") == 0){
+ printf(1, "mkdir dd/ff/ff succeeded!\n");
+ exit();
+ }
+ if(mkdir("dd/xx/ff") == 0){
+ printf(1, "mkdir dd/xx/ff succeeded!\n");
+ exit();
+ }
+ if(mkdir("dd/dd/ffff") == 0){
+ printf(1, "mkdir dd/dd/ffff succeeded!\n");
+ exit();
+ }
+ if(unlink("dd/xx/ff") == 0){
+ printf(1, "unlink dd/xx/ff succeeded!\n");
+ exit();
+ }
+ if(unlink("dd/ff/ff") == 0){
+ printf(1, "unlink dd/ff/ff succeeded!\n");
+ exit();
+ }
+ if(chdir("dd/ff") == 0){
+ printf(1, "chdir dd/ff succeeded!\n");
+ exit();
+ }
+ if(chdir("dd/xx") == 0){
+ printf(1, "chdir dd/xx succeeded!\n");
+ exit();
+ }
+
+ if(unlink("dd/dd/ffff") != 0){
+ printf(1, "unlink dd/dd/ff failed\n");
+ exit();
+ }
+ if(unlink("dd/ff") != 0){
+ printf(1, "unlink dd/ff failed\n");
+ exit();
+ }
+ if(unlink("dd") == 0){
+ printf(1, "unlink non-empty dd succeeded!\n");
+ exit();
+ }
+ if(unlink("dd/dd") < 0){
+ printf(1, "unlink dd/dd failed\n");
+ exit();
+ }
+ if(unlink("dd") < 0){
+ printf(1, "unlink dd failed\n");
+ exit();
+ }
+
+ printf(1, "subdir ok\n");
+}
+
+// test writes that are larger than the log.
+void
+bigwrite(void)
+{
+ int fd, sz;
+
+ printf(1, "bigwrite test\n");
+
+ unlink("bigwrite");
+ for(sz = 499; sz < 12*512; sz += 471){
+ fd = open("bigwrite", O_CREATE | O_RDWR);
+ if(fd < 0){
+ printf(1, "cannot create bigwrite\n");
+ exit();
+ }
+ int i;
+ for(i = 0; i < 2; i++){
+ int cc = write(fd, buf, sz);
+ if(cc != sz){
+ printf(1, "write(%d) ret %d\n", sz, cc);
+ exit();
+ }
+ }
+ close(fd);
+ unlink("bigwrite");
+ }
+
+ printf(1, "bigwrite ok\n");
+}
+
+void
+bigfile(void)
+{
+ int fd, i, total, cc;
+
+ printf(1, "bigfile test\n");
+
+ unlink("bigfile");
+ fd = open("bigfile", O_CREATE | O_RDWR);
+ if(fd < 0){
+ printf(1, "cannot create bigfile");
+ exit();
+ }
+ for(i = 0; i < 20; i++){
+ memset(buf, i, 600);
+ if(write(fd, buf, 600) != 600){
+ printf(1, "write bigfile failed\n");
+ exit();
+ }
+ }
+ close(fd);
+
+ fd = open("bigfile", 0);
+ if(fd < 0){
+ printf(1, "cannot open bigfile\n");
+ exit();
+ }
+ total = 0;
+ for(i = 0; ; i++){
+ cc = read(fd, buf, 300);
+ if(cc < 0){
+ printf(1, "read bigfile failed\n");
+ exit();
+ }
+ if(cc == 0)
+ break;
+ if(cc != 300){
+ printf(1, "short read bigfile\n");
+ exit();
+ }
+ if(buf[0] != i/2 || buf[299] != i/2){
+ printf(1, "read bigfile wrong data\n");
+ exit();
+ }
+ total += cc;
+ }
+ close(fd);
+ if(total != 20*600){
+ printf(1, "read bigfile wrong total\n");
+ exit();
+ }
+ unlink("bigfile");
+
+ printf(1, "bigfile test ok\n");
+}
+
+void
+fourteen(void)
+{
+ int fd;
+
+ // DIRSIZ is 14.
+ printf(1, "fourteen test\n");
+
+ if(mkdir("12345678901234") != 0){
+ printf(1, "mkdir 12345678901234 failed\n");
+ exit();
+ }
+ if(mkdir("12345678901234/123456789012345") != 0){
+ printf(1, "mkdir 12345678901234/123456789012345 failed\n");
+ exit();
+ }
+ fd = open("123456789012345/123456789012345/123456789012345", O_CREATE);
+ if(fd < 0){
+ printf(1, "create 123456789012345/123456789012345/123456789012345 failed\n");
+ exit();
+ }
+ close(fd);
+ fd = open("12345678901234/12345678901234/12345678901234", 0);
+ if(fd < 0){
+ printf(1, "open 12345678901234/12345678901234/12345678901234 failed\n");
+ exit();
+ }
+ close(fd);
+
+ if(mkdir("12345678901234/12345678901234") == 0){
+ printf(1, "mkdir 12345678901234/12345678901234 succeeded!\n");
+ exit();
+ }
+ if(mkdir("123456789012345/12345678901234") == 0){
+ printf(1, "mkdir 12345678901234/123456789012345 succeeded!\n");
+ exit();
+ }
+
+ printf(1, "fourteen ok\n");
+}
+
+void
+rmdot(void)
+{
+ printf(1, "rmdot test\n");
+ if(mkdir("dots") != 0){
+ printf(1, "mkdir dots failed\n");
+ exit();
+ }
+ if(chdir("dots") != 0){
+ printf(1, "chdir dots failed\n");
+ exit();
+ }
+ if(unlink(".") == 0){
+ printf(1, "rm . worked!\n");
+ exit();
+ }
+ if(unlink("..") == 0){
+ printf(1, "rm .. worked!\n");
+ exit();
+ }
+ if(chdir("/") != 0){
+ printf(1, "chdir / failed\n");
+ exit();
+ }
+ if(unlink("dots/.") == 0){
+ printf(1, "unlink dots/. worked!\n");
+ exit();
+ }
+ if(unlink("dots/..") == 0){
+ printf(1, "unlink dots/.. worked!\n");
+ exit();
+ }
+ if(unlink("dots") != 0){
+ printf(1, "unlink dots failed!\n");
+ exit();
+ }
+ printf(1, "rmdot ok\n");
+}
+
+void
+dirfile(void)
+{
+ int fd;
+
+ printf(1, "dir vs file\n");
+
+ fd = open("dirfile", O_CREATE);
+ if(fd < 0){
+ printf(1, "create dirfile failed\n");
+ exit();
+ }
+ close(fd);
+ if(chdir("dirfile") == 0){
+ printf(1, "chdir dirfile succeeded!\n");
+ exit();
+ }
+ fd = open("dirfile/xx", 0);
+ if(fd >= 0){
+ printf(1, "create dirfile/xx succeeded!\n");
+ exit();
+ }
+ fd = open("dirfile/xx", O_CREATE);
+ if(fd >= 0){
+ printf(1, "create dirfile/xx succeeded!\n");
+ exit();
+ }
+ if(mkdir("dirfile/xx") == 0){
+ printf(1, "mkdir dirfile/xx succeeded!\n");
+ exit();
+ }
+ if(unlink("dirfile/xx") == 0){
+ printf(1, "unlink dirfile/xx succeeded!\n");
+ exit();
+ }
+ if(link("README", "dirfile/xx") == 0){
+ printf(1, "link to dirfile/xx succeeded!\n");
+ exit();
+ }
+ if(unlink("dirfile") != 0){
+ printf(1, "unlink dirfile failed!\n");
+ exit();
+ }
+
+ fd = open(".", O_RDWR);
+ if(fd >= 0){
+ printf(1, "open . for writing succeeded!\n");
+ exit();
+ }
+ fd = open(".", 0);
+ if(write(fd, "x", 1) > 0){
+ printf(1, "write . succeeded!\n");
+ exit();
+ }
+ close(fd);
+
+ printf(1, "dir vs file OK\n");
+}
+
+// test that iput() is called at the end of _namei()
+void
+iref(void)
+{
+ int i, fd;
+
+ printf(1, "empty file name\n");
+
+ // the 50 is NINODE
+ for(i = 0; i < 50 + 1; i++){
+ if(mkdir("irefd") != 0){
+ printf(1, "mkdir irefd failed\n");
+ exit();
+ }
+ if(chdir("irefd") != 0){
+ printf(1, "chdir irefd failed\n");
+ exit();
+ }
+
+ mkdir("");
+ link("README", "");
+ fd = open("", O_CREATE);
+ if(fd >= 0)
+ close(fd);
+ fd = open("xx", O_CREATE);
+ if(fd >= 0)
+ close(fd);
+ unlink("xx");
+ }
+
+ chdir("/");
+ printf(1, "empty file name OK\n");
+}
+
+// test that fork fails gracefully
+// the forktest binary also does this, but it runs out of proc entries first.
+// inside the bigger usertests binary, we run out of memory first.
+void
+forktest(void)
+{
+ int n, pid;
+
+ printf(1, "fork test\n");
+
+ for(n=0; n<1000; n++){
+ pid = fork();
+ if(pid < 0)
+ break;
+ if(pid == 0)
+ exit();
+ }
+
+ if (n == 0) {
+ printf(1, "no fork at all!\n");
+ exit();
+ }
+
+ if(n == 1000){
+ printf(1, "fork claimed to work 1000 times!\n");
+ exit();
+ }
+
+ for(; n > 0; n--){
+ if(wait() < 0){
+ printf(1, "wait stopped early\n");
+ exit();
+ }
+ }
+
+ if(wait() != -1){
+ printf(1, "wait got too many\n");
+ exit();
+ }
+
+ printf(1, "fork test OK\n");
+}
+
+void
+sbrktest(void)
+{
+ int i, fds[2], pids[10], pid, ppid;
+ char *c, *oldbrk, scratch, *a, *b, *lastaddr, *p;
+ uint64 amt;
+ #define BIG (100*1024*1024)
+
+ printf(stdout, "sbrk test\n");
+ oldbrk = sbrk(0);
+
+ // can one sbrk() less than a page?
+ a = sbrk(0);
+ for(i = 0; i < 5000; i++){
+ b = sbrk(1);
+ if(b != a){
+ printf(stdout, "sbrk test failed %d %x %x\n", i, a, b);
+ exit();
+ }
+ *b = 1;
+ a = b + 1;
+ }
+ pid = fork();
+ if(pid < 0){
+ printf(stdout, "sbrk test fork failed\n");
+ exit();
+ }
+ c = sbrk(1);
+ c = sbrk(1);
+ if(c != a + 1){
+ printf(stdout, "sbrk test failed post-fork\n");
+ exit();
+ }
+ if(pid == 0)
+ exit();
+ wait();
+
+ // can one grow address space to something big?
+ a = sbrk(0);
+ amt = (BIG) - (uint64)a;
+ p = sbrk(amt);
+ if (p != a) {
+ printf(stdout, "sbrk test failed to grow big address space; enough phys mem?\n");
+ exit();
+ }
+ lastaddr = (char*) (BIG-1);
+ *lastaddr = 99;
+
+ // can one de-allocate?
+ a = sbrk(0);
+ c = sbrk(-4096);
+ if(c == (char*)0xffffffff){
+ printf(stdout, "sbrk could not deallocate\n");
+ exit();
+ }
+ c = sbrk(0);
+ if(c != a - 4096){
+ printf(stdout, "sbrk deallocation produced wrong address, a %x c %x\n", a, c);
+ exit();
+ }
+
+ // can one re-allocate that page?
+ a = sbrk(0);
+ c = sbrk(4096);
+ if(c != a || sbrk(0) != a + 4096){
+ printf(stdout, "sbrk re-allocation failed, a %x c %x\n", a, c);
+ exit();
+ }
+ if(*lastaddr == 99){
+ // should be zero
+ printf(stdout, "sbrk de-allocation didn't really deallocate\n");
+ exit();
+ }
+
+ a = sbrk(0);
+ c = sbrk(-(sbrk(0) - oldbrk));
+ if(c != a){
+ printf(stdout, "sbrk downsize failed, a %x c %x\n", a, c);
+ exit();
+ }
+
+ // can we read the kernel's memory?
+ for(a = (char*)(KERNBASE); a < (char*) (KERNBASE+2000000); a += 50000){
+ ppid = getpid();
+ pid = fork();
+ if(pid < 0){
+ printf(stdout, "fork failed\n");
+ exit();
+ }
+ if(pid == 0){
+ printf(stdout, "oops could read %x = %x\n", a, *a);
+ kill(ppid);
+ exit();
+ }
+ wait();
+ }
+
+ // if we run the system out of memory, does it clean up the last
+ // failed allocation?
+ if(pipe(fds) != 0){
+ printf(1, "pipe() failed\n");
+ exit();
+ }
+ for(i = 0; i < sizeof(pids)/sizeof(pids[0]); i++){
+ if((pids[i] = fork()) == 0){
+ // allocate a lot of memory
+ sbrk(BIG - (uint64)sbrk(0));
+ write(fds[1], "x", 1);
+ // sit around until killed
+ for(;;) sleep(1000);
+ }
+ if(pids[i] != -1)
+ read(fds[0], &scratch, 1);
+ }
+
+ // if those failed allocations freed up the pages they did allocate,
+ // we'll be able to allocate here
+ c = sbrk(4096);
+ for(i = 0; i < sizeof(pids)/sizeof(pids[0]); i++){
+ if(pids[i] == -1)
+ continue;
+ kill(pids[i]);
+ wait();
+ }
+ if(c == (char*)0xffffffff){
+ printf(stdout, "failed sbrk leaked memory\n");
+ exit();
+ }
+
+ if(sbrk(0) > oldbrk)
+ sbrk(-(sbrk(0) - oldbrk));
+
+ printf(stdout, "sbrk test OK\n");
+}
+
+void
+validateint(int *p)
+{
+ /* XXX int res;
+ asm("mov %%esp, %%ebx\n\t"
+ "mov %3, %%esp\n\t"
+ "int %2\n\t"
+ "mov %%ebx, %%esp" :
+ "=a" (res) :
+ "a" (SYS_sleep), "n" (T_SYSCALL), "c" (p) :
+ "ebx");
+ */
+}
+
+void
+validatetest(void)
+{
+ int hi, pid;
+ uint64 p;
+
+ printf(stdout, "validate test\n");
+ hi = 1100*1024;
+
+ for(p = 0; p <= (uint)hi; p += 4096){
+ if((pid = fork()) == 0){
+ // try to crash the kernel by passing in a badly placed integer
+ validateint((int*)p);
+ exit();
+ }
+ sleep(0);
+ sleep(0);
+ kill(pid);
+ wait();
+
+ // try to crash the kernel by passing in a bad string pointer
+ if(link("nosuchfile", (char*)p) != -1){
+ printf(stdout, "link should not succeed\n");
+ exit();
+ }
+ }
+
+ printf(stdout, "validate ok\n");
+}
+
+// does unintialized data start out zero?
+char uninit[10000];
+void
+bsstest(void)
+{
+ int i;
+
+ printf(stdout, "bss test\n");
+ for(i = 0; i < sizeof(uninit); i++){
+ if(uninit[i] != '\0'){
+ printf(stdout, "bss test failed\n");
+ exit();
+ }
+ }
+ printf(stdout, "bss test ok\n");
+}
+
+// does exec return an error if the arguments
+// are larger than a page? or does it write
+// below the stack and wreck the instructions/data?
+void
+bigargtest(void)
+{
+ int pid, fd;
+
+ unlink("bigarg-ok");
+ pid = fork();
+ if(pid == 0){
+ static char *args[MAXARG];
+ int i;
+ for(i = 0; i < MAXARG-1; i++)
+ args[i] = "bigargs test: failed\n ";
+ args[MAXARG-1] = 0;
+ printf(stdout, "bigarg test\n");
+ exec("echo", args);
+ printf(stdout, "bigarg test ok\n");
+ fd = open("bigarg-ok", O_CREATE);
+ close(fd);
+ exit();
+ } else if(pid < 0){
+ printf(stdout, "bigargtest: fork failed\n");
+ exit();
+ }
+ wait();
+ fd = open("bigarg-ok", 0);
+ if(fd < 0){
+ printf(stdout, "bigarg test failed!\n");
+ exit();
+ }
+ close(fd);
+ unlink("bigarg-ok");
+}
+
+// what happens when the file system runs out of blocks?
+// answer: balloc panics, so this test is not useful.
+void
+fsfull()
+{
+ int nfiles;
+ int fsblocks = 0;
+
+ printf(1, "fsfull test\n");
+
+ for(nfiles = 0; ; nfiles++){
+ char name[64];
+ name[0] = 'f';
+ name[1] = '0' + nfiles / 1000;
+ name[2] = '0' + (nfiles % 1000) / 100;
+ name[3] = '0' + (nfiles % 100) / 10;
+ name[4] = '0' + (nfiles % 10);
+ name[5] = '\0';
+ printf(1, "writing %s\n", name);
+ int fd = open(name, O_CREATE|O_RDWR);
+ if(fd < 0){
+ printf(1, "open %s failed\n", name);
+ break;
+ }
+ int total = 0;
+ while(1){
+ int cc = write(fd, buf, 512);
+ if(cc < 512)
+ break;
+ total += cc;
+ fsblocks++;
+ }
+ printf(1, "wrote %d bytes\n", total);
+ close(fd);
+ if(total == 0)
+ break;
+ }
+
+ while(nfiles >= 0){
+ char name[64];
+ name[0] = 'f';
+ name[1] = '0' + nfiles / 1000;
+ name[2] = '0' + (nfiles % 1000) / 100;
+ name[3] = '0' + (nfiles % 100) / 10;
+ name[4] = '0' + (nfiles % 10);
+ name[5] = '\0';
+ unlink(name);
+ nfiles--;
+ }
+
+ printf(1, "fsfull test finished\n");
+}
+
+void argptest()
+{
+ int fd;
+ fd = open("init", O_RDONLY);
+ if (fd < 0) {
+ printf(2, "open failed\n");
+ exit();
+ }
+ read(fd, sbrk(0) - 1, -1);
+ close(fd);
+ printf(1, "arg test passed\n");
+}
+
+unsigned long randstate = 1;
+unsigned int
+rand()
+{
+ randstate = randstate * 1664525 + 1013904223;
+ return randstate;
+}
+
+int
+main(int argc, char *argv[])
+{
+ printf(1, "usertests starting\n");
+
+ if(open("usertests.ran", 0) >= 0){
+ printf(1, "already ran user tests -- rebuild fs.img\n");
+ exit();
+ }
+ close(open("usertests.ran", O_CREATE));
+
+ argptest();
+ createdelete();
+ linkunlink();
+ concreate();
+ fourfiles();
+ sharedfd();
+
+ bigargtest();
+ bigwrite();
+ bigargtest();
+ bsstest();
+ sbrktest();
+ validatetest();
+
+ opentest();
+ writetest();
+ writetest1();
+ createtest();
+
+ openiputtest();
+ exitiputtest();
+ iputtest();
+
+ mem();
+ pipe1();
+ preempt();
+ exitwait();
+
+ rmdot();
+ fourteen();
+ bigfile();
+ subdir();
+ linktest();
+ unlinkread();
+ dirfile();
+ iref();
+ forktest();
+ bigdir(); // slow
+
+ exectest();
+
+ exit();
+}
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