static int do_drop(void)
{
daemon_reply reply;
int result;
int rv;
syslog(LOG_WARNING, "Dropping locks for VG %s.", arg_vg_name);
/*
* Check for misuse by looking for any active LVs in the VG
* and refusing this operation if found? One possible way
* to kill LVs (e.g. if fs cannot be unmounted) is to suspend
* them, or replace them with the error target. In that
* case the LV will still appear to be active, but it is
* safe to release the lock.
*/
reply = _lvmlockd_send("drop_vg",
"cmd = %s", "lvmlockctl",
"pid = " FMTd64, (int64_t) getpid(),
"vg_name = %s", arg_vg_name,
NULL);
if (!_lvmlockd_result(reply, &result)) {
log_error("lvmlockd result %d", result);
rv = result;
} else {
rv = 0;
}
daemon_reply_destroy(reply);
return rv;
}
static int do_stop_lockspaces(void)
{
daemon_reply reply;
char opts[32];
int result;
int rv;
memset(opts, 0, sizeof(opts));
if (wait_opt)
strcat(opts, "wait ");
if (force_opt)
strcat(opts, "force ");
reply = _lvmlockd_send("stop_all",
"cmd = %s", "lvmlockctl",
"pid = " FMTd64, (int64_t) getpid(),
"opts = %s", opts[0] ? opts : "none",
NULL);
if (!_lvmlockd_result(reply, &result)) {
log_error("lvmlockd result %d", result);
rv = result;
} else {
rv = 0;
}
daemon_reply_destroy(reply);
return rv;
}
static int do_dump(const char *req_name)
{
daemon_reply reply;
int result;
int fd, rv = 0;
int count = 0;
fd = setup_dump_socket();
if (fd < 0) {
log_error("socket error %d", fd);
return fd;
}
reply = daemon_send_simple(_lvmlockd, req_name, NULL);
if (reply.error) {
log_error("reply error %d", reply.error);
rv = reply.error;
goto out;
}
result = daemon_reply_int(reply, "result", 0);
dump_len = daemon_reply_int(reply, "dump_len", 0);
daemon_reply_destroy(reply);
if (result < 0) {
rv = result;
log_error("result %d", result);
}
if (!dump_len)
goto out;
memset(dump_buf, 0, sizeof(dump_buf));
retry:
rv = recvfrom(fd, dump_buf + count, dump_len - count, MSG_WAITALL,
(struct sockaddr *)&dump_addr, &dump_addrlen);
if (rv < 0) {
log_error("recvfrom error %d %d", rv, errno);
rv = -errno;
goto out;
}
count += rv;
if (count < dump_len)
goto retry;
rv = 0;
if ((info && dump) || !strcmp(req_name, "dump"))
printf("%s\n", dump_buf);
else
format_info();
out:
if (close(fd))
log_error("failed to close dump socket %d", fd);
return rv;
}
static int do_quit(void)
{
daemon_reply reply;
int rv = 0;
reply = daemon_send_simple(_lvmlockd, "quit", NULL);
if (reply.error) {
log_error("reply error %d", reply.error);
rv = reply.error;
}
daemon_reply_destroy(reply);
return rv;
}
static int do_kill(void)
{
daemon_reply reply;
int result;
int rv;
syslog(LOG_EMERG, "Lost access to sanlock lease storage in VG %s.", arg_vg_name);
/* These two lines explain the manual alternative to the FIXME below. */
syslog(LOG_EMERG, "Immediately deactivate LVs in VG %s.", arg_vg_name);
syslog(LOG_EMERG, "Once VG is unused, run lvmlockctl --drop %s.", arg_vg_name);
/*
* It may not be strictly necessary to notify lvmlockd of the kill, but
* lvmlockd can use this information to avoid attempting any new lock
* requests in the VG (which would fail anyway), and can return an
* error indicating that the VG has been killed.
*/
reply = _lvmlockd_send("kill_vg",
"cmd = %s", "lvmlockctl",
"pid = " FMTd64, (int64_t) getpid(),
"vg_name = %s", arg_vg_name,
NULL);
if (!_lvmlockd_result(reply, &result)) {
log_error("lvmlockd result %d", result);
rv = result;
} else {
rv = 0;
}
daemon_reply_destroy(reply);
/*
* FIXME: here is where we should implement a strong form of
* blkdeactivate, and if it completes successfully, automatically call
* do_drop() afterward. (The drop step may not always be necessary
* if the lvm commands run while shutting things down release all the
* leases.)
*
* run_strong_blkdeactivate();
* do_drop();
*/
return rv;
}
static int do_able(const char *req_name)
{
daemon_reply reply;
int result;
int rv;
reply = _lvmlockd_send(req_name,
"cmd = %s", "lvmlockctl",
"pid = " FMTd64, (int64_t) getpid(),
"vg_name = %s", arg_vg_name,
NULL);
if (!_lvmlockd_result(reply, &result)) {
log_error("lvmlockd result %d", result);
rv = result;
} else {
rv = 0;
}
daemon_reply_destroy(reply);
return rv;
}
int main(int argc, char **argv)
{
daemon_reply reply;
char *cmd;
char *uuid;
char *name;
int val;
int ver;
if (argc < 2) {
printf("lvmetactl dump\n");
printf("lvmetactl pv_list\n");
printf("lvmetactl vg_list\n");
printf("lvmetactl vg_lookup_name <name>\n");
printf("lvmetactl vg_lookup_uuid <uuid>\n");
printf("lvmetactl pv_lookup_uuid <uuid>\n");
printf("lvmetactl set_global_invalid 0|1\n");
printf("lvmetactl get_global_invalid\n");
printf("lvmetactl set_vg_version <uuid> <name> <version>\n");
printf("lvmetactl vg_lock_type <uuid>\n");
return -1;
}
cmd = argv[1];
h = lvmetad_open(NULL);
if (!strcmp(cmd, "dump")) {
reply = daemon_send_simple(h, "dump",
"token = %s", "skip",
NULL);
printf("%s\n", reply.buffer.mem);
} else if (!strcmp(cmd, "pv_list")) {
reply = daemon_send_simple(h, "pv_list",
"token = %s", "skip",
NULL);
printf("%s\n", reply.buffer.mem);
} else if (!strcmp(cmd, "vg_list")) {
reply = daemon_send_simple(h, "vg_list",
"token = %s", "skip",
NULL);
printf("%s\n", reply.buffer.mem);
} else if (!strcmp(cmd, "set_global_invalid")) {
if (argc < 3) {
printf("set_global_invalid 0|1\n");
return -1;
}
val = atoi(argv[2]);
reply = daemon_send_simple(h, "set_global_info",
"global_invalid = %d", val,
"token = %s", "skip",
NULL);
print_reply(reply);
} else if (!strcmp(cmd, "get_global_invalid")) {
reply = daemon_send_simple(h, "get_global_info",
"token = %s", "skip",
NULL);
printf("%s\n", reply.buffer.mem);
} else if (!strcmp(cmd, "set_vg_version")) {
if (argc < 5) {
printf("set_vg_version <uuid> <name> <ver>\n");
return -1;
}
uuid = argv[2];
name = argv[3];
ver = atoi(argv[4]);
if ((strlen(uuid) == 1) && (uuid[0] == '-'))
uuid = NULL;
if ((strlen(name) == 1) && (name[0] == '-'))
name = NULL;
if (uuid && name) {
reply = daemon_send_simple(h, "set_vg_info",
"uuid = %s", uuid,
"name = %s", name,
"version = %d", ver,
"token = %s", "skip",
NULL);
} else if (uuid) {
reply = daemon_send_simple(h, "set_vg_info",
"uuid = %s", uuid,
"version = %d", ver,
"token = %s", "skip",
NULL);
} else if (name) {
reply = daemon_send_simple(h, "set_vg_info",
"name = %s", name,
"version = %d", ver,
"token = %s", "skip",
NULL);
} else {
printf("name or uuid required\n");
return -1;
}
print_reply(reply);
} else if (!strcmp(cmd, "vg_lookup_name")) {
if (argc < 3) {
printf("vg_lookup_name <name>\n");
return -1;
}
name = argv[2];
reply = daemon_send_simple(h, "vg_lookup",
"name = %s", name,
"token = %s", "skip",
NULL);
printf("%s\n", reply.buffer.mem);
} else if (!strcmp(cmd, "vg_lookup_uuid")) {
if (argc < 3) {
printf("vg_lookup_uuid <uuid>\n");
return -1;
}
uuid = argv[2];
reply = daemon_send_simple(h, "vg_lookup",
"uuid = %s", uuid,
"token = %s", "skip",
NULL);
printf("%s\n", reply.buffer.mem);
} else if (!strcmp(cmd, "vg_lock_type")) {
struct dm_config_node *metadata;
const char *lock_type;
if (argc < 3) {
printf("vg_lock_type <uuid>\n");
return -1;
}
uuid = argv[2];
reply = daemon_send_simple(h, "vg_lookup",
"uuid = %s", uuid,
"token = %s", "skip",
NULL);
/* printf("%s\n", reply.buffer.mem); */
metadata = dm_config_find_node(reply.cft->root, "metadata");
if (!metadata) {
printf("no metadata\n");
goto out;
}
lock_type = dm_config_find_str(metadata, "metadata/lock_type", NULL);
if (!lock_type) {
printf("no lock_type\n");
goto out;
}
printf("lock_type %s\n", lock_type);
} else if (!strcmp(cmd, "pv_lookup_uuid")) {
if (argc < 3) {
printf("pv_lookup_uuid <uuid>\n");
return -1;
}
uuid = argv[2];
reply = daemon_send_simple(h, "pv_lookup",
"uuid = %s", uuid,
"token = %s", "skip",
NULL);
printf("%s\n", reply.buffer.mem);
} else {
printf("unknown command\n");
goto out_close;
}
out:
daemon_reply_destroy(reply);
out_close:
daemon_close(h);
return 0;
}