/* setup() - performs all ONE TIME setup for this test */
void setup()
{
tst_sig(FORK, DEF_HANDLER, cleanup);
/* Check whether we are root */
if (geteuid() != 0) {
tst_brkm(TBROK, NULL, "Test must be run as root");
}
TEST_PAUSE;
tst_tmpdir();
if (tst_is_cwd_tmpfs()) {
tst_brkm(TCONF, cleanup,
"Cannot do swapon on a file located on a tmpfs filesystem");
}
if (tst_is_cwd_nfs()) {
tst_brkm(TCONF, cleanup,
"Cannot do swapon on a file located on a nfs filesystem");
}
make_swapfile(cleanup, "swapfile01");
}
static void setup(void)
{
tst_sig(FORK, DEF_HANDLER, cleanup);
tst_require_root();
TEST_PAUSE;
tst_tmpdir();
switch ((fs_type = tst_fs_type(cleanup, "."))) {
case TST_NFS_MAGIC:
case TST_TMPFS_MAGIC:
tst_brkm(TCONF, cleanup,
"Cannot do swapon on a file on %s filesystem",
tst_fs_type_name(fs_type));
break;
}
make_swapfile(cleanup, "swapfile01");
}
/*
* Create 33 and activate 30 swapfiles.
*/
static int setup_swap(void)
{
pid_t pid;
int j, fd;
int status;
int res = 0;
char filename[15];
char buf[BUFSIZ + 1];
/* Find out how many swapfiles (1 line per entry) already exist */
swapfiles = 0;
if (seteuid(0) < 0) {
tst_brkm(TFAIL | TERRNO, cleanup, "Failed to call seteuid");
}
/* This includes the first (header) line */
if ((fd = open("/proc/swaps", O_RDONLY)) == -1) {
tst_brkm(TFAIL | TERRNO, cleanup,
"Failed to find out existing number of swap files");
}
do {
char *p = buf;
res = read(fd, buf, BUFSIZ);
if (res < 0) {
tst_brkm(TFAIL | TERRNO, cleanup,
"Failed to find out existing number of swap "
"files");
}
buf[res] = '\0';
while ((p = strchr(p, '\n'))) {
p++;
swapfiles++;
}
} while (BUFSIZ <= res);
close(fd);
if (swapfiles)
swapfiles--; /* don't count the /proc/swaps header */
if (swapfiles < 0) {
tst_brkm(TFAIL, cleanup,
"Failed to find existing number of swapfiles");
}
/* Determine how many more files are to be created */
swapfiles = MAX_SWAPFILES - swapfiles;
if (swapfiles > MAX_SWAPFILES) {
swapfiles = MAX_SWAPFILES;
}
pid = FORK_OR_VFORK();
if (pid == 0) {
/*create and turn on remaining swapfiles */
for (j = 0; j < swapfiles; j++) {
/* prepare filename for the iteration */
if (sprintf(filename, "swapfile%02d", j + 2) < 0) {
printf("sprintf() failed to create "
"filename");
exit(1);
}
/* Create the swapfile */
make_swapfile(cleanup, filename);
/* turn on the swap file */
res = ltp_syscall(__NR_swapon, filename, 0);
if (res != 0) {
if (fs_type == TST_BTRFS_MAGIC && errno == EINVAL)
exit(2);
if (errno == EPERM) {
printf("Successfully created %d "
"swapfiles\n", j);
break;
} else {
printf("Failed to create "
"swapfile: %s\n", filename);
exit(1);
}
}
}
exit(0);
} else
waitpid(pid, &status, 0);
switch (WEXITSTATUS(status)) {
case 0:
break;
case 2:
tst_brkm(TCONF, cleanup, "Swapfile on BTRFS not implemeted");
break;
default:
tst_brkm(TFAIL, cleanup, "Failed to setup swaps");
break;
}
/* Create all needed extra swapfiles for testing */
for (j = 0; j < testfiles; j++)
make_swapfile(cleanup, swap_testfiles[j].filename);
return 0;
}