fix bugs in indirect-file code
clean up test program
This commit is contained in:
kaashoek
parent
ea2909b6b5
commit
1be7668537
21
fs.c
21
fs.c
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@ -241,8 +241,7 @@ bmap(struct inode *ip, uint bn)
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if (x == 0)
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panic("bmap 2");
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} else {
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cprintf("indirect block read\n");
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inbp = bread(ip->dev, INDIRECT);
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inbp = bread(ip->dev, ip->addrs[INDIRECT]);
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a = (uint *) inbp->data;
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x = a[bn - NDIRECT];
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brelse(inbp);
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@ -256,21 +255,23 @@ void
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iunlink(struct inode *ip)
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{
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int i, j;
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struct buf *inbp;
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// free inode, its blocks, and remove dir entry
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for (i = 0; i < NADDRS; i++) {
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if (ip->addrs[i] != 0) {
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if (i == INDIRECT) {
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inbp = bread(ip->dev, ip->addrs[INDIRECT]);
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for (j = 0; j < NINDIRECT; j++) {
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uint *a = (uint *) (ip->addrs[i]);
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uint *a = (uint *) inbp->data;
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if (a[j] != 0) {
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bfree(ip->dev, a[j]);
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a[j] = 0;
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}
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}
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}
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else
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bfree(ip->dev, ip->addrs[i]);
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brelse(inbp);
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}
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bfree(ip->dev, ip->addrs[i]);
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ip->addrs[i] = 0;
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}
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}
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@ -354,7 +355,7 @@ readi(struct inode *ip, char *dst, uint off, uint n)
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return target - n;
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}
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int
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static int
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newblock(struct inode *ip, uint lbn)
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{
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struct buf *inbp;
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@ -368,20 +369,18 @@ newblock(struct inode *ip, uint lbn)
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ip->addrs[lbn] = b;
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}
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} else {
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cprintf("newblock: use indirect block\n");
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if (ip->addrs[INDIRECT] == 0) {
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cprintf("newblock: allocate indirect block\n");
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b = balloc(ip->dev);
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if (b <= 0) return -1;
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ip->addrs[INDIRECT] = b;
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}
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inbp = bread(ip->dev, bmap(ip, INDIRECT));
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inbp = bread(ip->dev, ip->addrs[INDIRECT]);
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inaddrs = (uint *) inbp->data;
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if (inaddrs[lbn - NDIRECT] == 0) {
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b = balloc(ip->dev);
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if (b <= 0) return -1;
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inaddrs[lbn - NDIRECT] = b;
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bwrite(inbp, INDIRECT);
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bwrite(inbp, ip->addrs[INDIRECT]);
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}
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brelse(inbp);
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}
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158
userfs.c
158
userfs.c
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@ -4,25 +4,18 @@
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#include "fs.h"
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#include "fcntl.h"
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// file system tests
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// simple file system tests
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char buf[2000];
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char name[3];
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char *echo_args[] = { "echo", "hello", "goodbye", 0 };
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char *cat_args[] = { "cat", "readme", 0 };
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int stdout = 1;
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int
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main(void)
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void
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opentest(void)
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{
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int fd;
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int i;
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int stdout = 1;
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printf(stdout, "userfs is running\n");
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if (sbrk(4096) < 0) {
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printf(stdout, "sbrk failed\n");
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}
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fd = open("echo", 0);
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if(fd >= 0){
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@ -30,47 +23,123 @@ main(void)
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close(fd);
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} else {
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printf(stdout, "open echo failed!\n");
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exit();
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}
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fd = open("doesnotexist", 0);
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if(fd >= 0){
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printf(stdout, "open doesnotexist succeeded!\n");
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close(fd);
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exit();
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} else {
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printf(stdout, "open doesnotexist failed\n");
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}
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fd = open("doesnotexist", O_CREATE|O_RDWR);
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}
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void
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writetest(void)
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{
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int fd;
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int i;
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fd = open("small", O_CREATE|O_RDWR);
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if(fd >= 0){
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printf(stdout, "creat doesnotexist succeeded\n");
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printf(stdout, "creat small succeeded\n");
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} else {
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printf(stdout, "error: creat doesnotexist failed!\n");
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printf(stdout, "error: creat small failed!\n");
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exit();
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}
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for (i = 0; i < 100; i++) {
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if (write (fd, "aaaaaaaaaa", 10) != 10) {
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printf(stdout, "error: write aa %d new file failed\n", i);
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exit();
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}
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if (write (fd, "bbbbbbbbbb", 10) != 10) {
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printf(stdout, "error: write bb %d new file failed\n", i);
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exit();
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}
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}
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printf(stdout, "writes done\n");
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close(fd);
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fd = open("doesnotexist", O_RDONLY);
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fd = open("small", O_RDONLY);
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if(fd >= 0){
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printf(stdout, "open doesnotexist succeeded\n");
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printf(stdout, "open small succeeded\n");
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} else {
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printf(stdout, "error: open doesnotexist failed!\n");
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printf(stdout, "error: open small failed!\n");
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exit();
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}
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i = read(fd, buf, 2000);
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if (i == 2000) {
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printf(stdout, "read succeeded\n");
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} else {
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printf(stdout, "read failed\n");
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exit();
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}
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close(fd);
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printf(stdout, "unlink doesnotexist\n");
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if (unlink("small") < 0) {
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printf(stdout, "unlink small failed\n");
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exit();
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}
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}
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unlink("doesnotexist");
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void
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writetest1(void)
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{
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int i, fd, n;
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printf(stdout, "big files\n");
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fd = open("big", O_CREATE|O_RDWR);
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if(fd < 0){
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printf(stdout, "error: creat big failed!\n");
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exit();
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}
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for (i = 0; i < MAXFILE; i++) {
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((int *) buf)[0] = i;
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if (write (fd, buf, 512) != 512) {
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printf(stdout, "error: write big file failed\n", i);
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exit();
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}
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}
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close(fd);
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fd = open("big", O_RDONLY);
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if(fd < 0){
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printf(stdout, "error: open big failed!\n");
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exit();
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}
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n = 0;
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while (1) {
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i = read(fd, buf, 512);
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if (i == 0) {
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if (n == MAXFILE - 1) {
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printf(stdout, "read only %d blocks from big", n);
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exit();
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}
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break;
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} else if (i != 512) {
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printf(stdout, "read failed %d\n", i);
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exit();
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}
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if (((int *)buf)[0] != n) {
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printf(stdout, "read content of block %d is %d\n", n, ((int *)buf)[0]);
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exit();
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}
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n++;
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}
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close(fd);
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if (unlink("big") < 0) {
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printf(stdout, "unlink big failed\n");
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exit();
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}
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}
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void
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createtest(void)
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{
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int i, fd;
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printf(stdout, "many creates, followed by unlink\n");
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@ -87,16 +156,55 @@ main(void)
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name[1] = '0' + i;
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unlink(name);
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}
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}
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void dirtest(void)
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{
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printf(stdout, "mkdir\n");
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if (mkdir("dir0") < 0)
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if (mkdir("dir0") < 0) {
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printf(stdout, "mkdir failed\n");
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exit();
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}
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// unlink("dir0");
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if (chdir("dir0") < 0) {
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printf(stdout, "chdir dir0 failed\n");
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exit();
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}
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//exec("echo", echo_args);
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printf(stdout, "about to do exec\n");
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exec("cat", cat_args);
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if (chdir("..") < 0) {
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printf(stdout, "chdir .. failed\n");
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exit ();
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}
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if (unlink("dir0") < 0) {
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printf(stdout, "unlink dir0 failed\n");
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exit();
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}
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}
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void
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exectest(void)
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{
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if (exec("echo", echo_args) < 0) {
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printf(stdout, "exec echo failed\n");
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exit();
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}
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if (exec("cat", cat_args) < 0) {
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printf(stdout, "exec cat failed\n");
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exit();
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}
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}
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int
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main(void)
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{
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printf(stdout, "userfs is running\n");
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opentest();
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writetest();
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writetest1();
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createtest();
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exectest();
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return 0;
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}
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