read/write and write only modes

diff --git a/bcache-test.c b/bcache-test.c
index 93da0582e6eb5c09f4d6d9e5de64084f46048bfd..5858cab12e80c5f9da3c696cfa37d5b7726dfe77 100644 (file)
--- a/bcache-test.c
+++ b/bcache-test.c
@@ -149,7 +149,7 @@ void usage()
 
 int main(int argc, char **argv)
 {
-       bool walk = false, randsize = false, verbose = false, csum = false, destructive = false;
+       bool walk = false, randsize = false, verbose = false, csum = false, rtest = false, wtest = false;
        int fd1, fd2 = 0, direct = 0, nbytes = 4096, j, o;
        unsigned long size, i, offset = 0, done = 0, unique = 0, benchmark = 0;
        void *buf1 = NULL, *buf2 = NULL;
@@ -179,7 +179,10 @@ int main(int argc, char **argv)
                        csum = true;
                        break;
                case 'w':
-                       destructive = true;
+                       wtest = true;
+                       break;
+               case 'r':
+                       rtest = true;
                        break;
                case 'l':
                        klog = true;
@@ -194,6 +197,9 @@ int main(int argc, char **argv)
        argv += optind;
        argc -= optind;
 
+       if (!rtest && !wtest)
+               rtest = true;
+
        if (argc < 1) {
                printf("Please enter a device to test\n");
                exit(EXIT_FAILURE);
@@ -204,9 +210,9 @@ int main(int argc, char **argv)
                exit(EXIT_FAILURE);
        }
 
-       fd1 = open(argv[0], (destructive ? O_RDWR : O_RDONLY)|direct);
+       fd1 = open(argv[0], (wtest ? O_RDWR : O_RDONLY)|direct);
        if (!csum && !benchmark)
-               fd2 = open(argv[1], (destructive ? O_RDWR : O_RDONLY)|direct);
+               fd2 = open(argv[1], (wtest ? O_RDWR : O_RDONLY)|direct);
 
        if (fd1 == -1 || fd2 == -1) {
                perror("Error opening device");
@@ -229,7 +235,7 @@ int main(int argc, char **argv)
        //setvbuf(stdout, NULL, _IONBF, 0);
        
        for (i = 0; !benchmark || i < benchmark; i++) {
-               bool writing = destructive && (i & 1);
+               bool writing = (wtest && (i & 1)) || !rtest;
                nbytes = randsize ? drand48() * 16 + 1 : 1;
                nbytes <<= 12;