void
testOverlap(void)
{
char buf[20];
memset(buf, 12, sizeof(buf));
buf[12] = 13;
ASSERT(!verifyBlock(buf, 12, sizeof(buf)));
buf[12] = 12;
ASSERT(verifyBlock(buf, 12, sizeof(buf)));
}
void
testBP(void)
{
char above[ABOVE_MEM_SIZE];
int f;
char below[BELOW_MEM_SIZE];
memset(above, ABOVE_MEM_TEST_SIZE, sizeof(above));
memset(below, BELOW_MEM_TEST_SIZE, sizeof(below));
ASSERT(verifyBlock(above, ABOVE_MEM_TEST_SIZE, sizeof(above)));
ASSERT(verifyBlock(below, BELOW_MEM_TEST_SIZE, sizeof(below)));
f = spoil(-5);
spoil(f);
ASSERT(verifyBlock(above, ABOVE_MEM_TEST_SIZE, sizeof(above)));
ASSERT(verifyBlock(below, BELOW_MEM_TEST_SIZE, sizeof(below)));
}
static int
DnD_TryInitVmblock(const char *vmbFsName, // IN
const char *vmbMntPoint, // IN
const char *vmbDevice, // IN
mode_t vmbDeviceMode, // IN
Bool (*verifyBlock)(int fd)) // IN
{
#if defined NO_SETMNTENT || defined NO_ENDMNTENT
NOT_IMPLEMENTED();
errno = ENOSYS;
return -1;
#else
Bool found = FALSE;
int blockFd = -1;
char *realMntPoint;
MNTHANDLE fp;
DECLARE_MNTINFO(mnt);
ASSERT(vmbFsName);
ASSERT(vmbMntPoint);
ASSERT(vmbDevice);
/* Resolve desired mount point in case it is symlinked somewhere */
realMntPoint = Posix_RealPath(vmbMntPoint);
if (!realMntPoint) {
/*
* If resolve failed for some reason try to fall back to
* original mount point specification.
*/
realMntPoint = Util_SafeStrdup(vmbMntPoint);
}
/* Make sure the vmblock file system is mounted. */
fp = OPEN_MNTFILE("r");
if (fp == NULL) {
LOG(1, ("%s: could not open mount file\n", __func__));
goto out;
}
while (GETNEXT_MNTINFO(fp, mnt)) {
/*
* In the future we can publish the mount point in VMDB so that the UI
* can use it rather than enforcing the VMBLOCK_MOUNT_POINT check here.
*/
if (strcmp(MNTINFO_FSTYPE(mnt), vmbFsName) == 0 &&
strcmp(MNTINFO_MNTPT(mnt), realMntPoint) == 0) {
found = TRUE;
break;
}
}
(void) CLOSE_MNTFILE(fp);
if (found) {
/* Open device node for communication with vmblock. */
blockFd = Posix_Open(vmbDevice, vmbDeviceMode);
if (blockFd < 0) {
LOG(1, ("%s: Can not open blocker device (%s)\n",
__func__, strerror(errno)));
} else {
LOG(4, ("%s: Opened blocker device at %s\n",
__func__, VMBLOCK_DEVICE));
if (verifyBlock && !verifyBlock(blockFd)) {
LOG(4, ("%s: Blocker device at %s did not pass checks, closing.\n",
__func__, VMBLOCK_DEVICE));
close(blockFd);
blockFd = -1;
}
}
}
out:
free(realMntPoint);
return blockFd;
#endif
}
