static int register_unit_with_target(const char *dir, const char *unit, const char *target)
{
int r = 1;
if (dm_snprintf(target_path, PATH_MAX, "%s/%s.wants", dir, target) < 0) {
r = 0; goto out;
}
(void) dm_prepare_selinux_context(target_path, S_IFDIR);
if (mkdir(target_path, 0755) < 0 && errno != EEXIST) {
kmsg(LOG_ERR, "LVM: Failed to create target directory %s: %m.\n", target_path);
r = 0; goto out;
}
if (dm_snprintf(target_path, PATH_MAX, "%s/%s.wants/%s", dir, target, unit) < 0) {
r = 0; goto out;
}
(void) dm_prepare_selinux_context(target_path, S_IFLNK);
if (symlink(unit_path, target_path) < 0) {
kmsg(LOG_ERR, "LVM: Failed to create symlink for unit %s: %m.\n", unit);
r = 0;
}
out:
dm_prepare_selinux_context(NULL, 0);
return r;
}
int main(int argc, char *argv[])
{
const char *dir;
int r = EXIT_SUCCESS;
kmsg_fd = open(KMSG_DEV_PATH, O_WRONLY|O_NOCTTY);
if (argc != 4) {
kmsg(LOG_ERR, "LVM: Incorrect number of arguments for activation generator.\n");
r = EXIT_FAILURE; goto out;
}
/* If lvmetad used, rely on autoactivation instead of direct activation. */
if (lvm_uses_lvmetad())
goto out;
dir = argv[1];
if (!generate_unit(dir, UNIT_EARLY) ||
!generate_unit(dir, UNIT_MAIN) ||
!generate_unit(dir, UNIT_NET))
r = EXIT_FAILURE;
out:
if (r)
kmsg(LOG_ERR, "LVM: Activation generator failed.\n");
if (kmsg_fd != -1)
(void) close(kmsg_fd);
return r;
}
static int generate_unit(const char *dir, int unit)
{
FILE *f;
const char *unit_name = unit_names[unit];
const char *target_name = unit == UNIT_NET ? UNIT_TARGET_REMOTE_FS : UNIT_TARGET_LOCAL_FS;
if (dm_snprintf(unit_path, PATH_MAX, "%s/%s", dir, unit_name) < 0)
return 0;
if (!(f = fopen(unit_path, "wxe"))) {
kmsg(LOG_ERR, "LVM: Failed to create unit file %s: %m.\n", unit_name);
return 0;
}
fputs("# Automatically generated by lvm2-activation-generator.\n"
"#\n"
"# This unit is responsible for direct activation of LVM2 logical volumes\n"
"# if lvmetad daemon is not used (global/use_lvmetad=0 lvm.conf setting),\n"
"# hence volume autoactivation is not applicable.\n"
"# Direct LVM2 activation requires udev to be settled!\n\n"
"[Unit]\n"
"Description=Activation of LVM2 logical volumes\n"
"Documentation=man:lvm(8) man:vgchange(8)\n"
"SourcePath=/etc/lvm/lvm.conf\n"
"DefaultDependencies=no\n", f);
if (unit == UNIT_NET) {
fprintf(f, "After=%s iscsi.service fcoe.service\n"
"Before=remote-fs.target shutdown.target\n\n"
"[Service]\n"
"ExecStartPre=/usr/bin/udevadm settle\n", unit_names[UNIT_MAIN]);
} else {
if (unit == UNIT_EARLY) {
fputs("After=systemd-udev-settle.service\n"
"Before=cryptsetup.target\n", f);
} else
fprintf(f, "After= %s cryptsetup.target\n", unit_names[UNIT_EARLY]);
fputs("Before=local-fs.target shutdown.target\n"
"Wants=systemd-udev-settle.service\n\n"
"[Service]\n", f);
}
fputs("ExecStart=" LVM_PATH " vgchange -aay --sysinit\n"
"Type=oneshot\n", f);
if (fclose(f) < 0) {
kmsg(LOG_ERR, "LVM: Failed to write unit file %s: %m.\n", unit_name);
return 0;
}
if (!register_unit_with_target(dir, unit_name, target_name)) {
kmsg(LOG_ERR, "LVM: Failed to register unit %s with target %s.\n", unit_name, target_name);
return 0;
}
return 1;
}
irqreturn_t microusbic_interrupt(int irq, void *dev)
{
#if 0
int *id = (int *)dev;
kmsg("2 irq : %d, gpio %d level =======> %d\n", irq , irq_to_gpio(irq),
omap_get_gpio_datain(irq_to_gpio(irq)));
#endif
schedule_work(&work_device_intr);
return IRQ_HANDLED;
}
static int lvm_uses_lvmetad(void)
{
lvm_t lvm;
int r;
if (!(lvm = lvm_init(NULL))) {
kmsg(LOG_ERR, "LVM: Failed to initialize library context for activation generator.\n");
return 0;
}
r = lvm_config_find_bool(lvm, LVM_CONF_USE_LVMETAD, 0);
lvm_quit(lvm);
return r;
}