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s3-ctdb: Add ctdb_processes_exist

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This sends out a number of process_exists controls in parallel and collects the
replies as they come in.
This commit is contained in:
Volker Lendecke
2011-10-23 21:38:54 +02:00
committed by Volker Lendecke
parent c2edecf6bd
commit 1c4fe39033
2 changed files with 101 additions and 0 deletions
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98
source3/lib/ctdbd_conn.c
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@ -932,6 +932,104 @@ bool ctdbd_process_exists(struct ctdbd_connection *conn, uint32 vnn, pid_t pid)
return cstatus == 0;
}
bool ctdb_processes_exist(struct ctdbd_connection *conn,
const struct server_id *pids, int num_pids,
bool *results)
{
TALLOC_CTX *frame = talloc_stackframe();
int i, num_received;
NTSTATUS status;
uint32_t *reqids;
bool result = false;
reqids = talloc_array(talloc_tos(), uint32_t, num_pids);
if (reqids == NULL) {
goto fail;
}
for (i=0; i<num_pids; i++) {
struct ctdb_req_control req;
results[i] = false;
reqids[i] = ctdbd_next_reqid(conn);
ZERO_STRUCT(req);
req.hdr.length = offsetof(struct ctdb_req_control, data);
req.hdr.length += sizeof(pid_t);
req.hdr.ctdb_magic = CTDB_MAGIC;
req.hdr.ctdb_version = CTDB_VERSION;
req.hdr.operation = CTDB_REQ_CONTROL;
req.hdr.reqid = reqids[i];
req.hdr.destnode = pids[i].vnn;
req.opcode = CTDB_CONTROL_PROCESS_EXISTS;
req.srvid = 0;
req.datalen = sizeof(pids[i].pid);
req.flags = 0;
DEBUG(10, ("ctdbd_control: Sending ctdb packet\n"));
ctdb_packet_dump(&req.hdr);
status = ctdb_packet_send(
conn->pkt, 2,
data_blob_const(
&req, offsetof(struct ctdb_req_control, data)),
data_blob_const(&pids[i].pid, sizeof(pids[i].pid)));
if (!NT_STATUS_IS_OK(status)) {
DEBUG(10, ("ctdb_packet_send failed: %s\n",
nt_errstr(status)));
goto fail;
}
}
status = ctdb_packet_flush(conn->pkt);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(10, ("ctdb_packet_flush failed: %s\n",
nt_errstr(status)));
goto fail;
}
num_received = 0;
while (num_received < num_pids) {
struct ctdb_reply_control *reply = NULL;
uint32_t reqid;
status = ctdb_read_req(conn, 0, talloc_tos(), (void *)&reply);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(10, ("ctdb_read_req failed: %s\n",
nt_errstr(status)));
goto fail;
}
if (reply->hdr.operation != CTDB_REPLY_CONTROL) {
DEBUG(10, ("Received invalid reply\n"));
goto fail;
}
reqid = reply->hdr.reqid;
for (i=0; i<num_pids; i++) {
if (reqid == reqids[i]) {
break;
}
}
if (i == num_pids) {
DEBUG(10, ("Received unknown record number %u\n",
(unsigned)reqid));
goto fail;
}
results[i] = ((reply->status) == 0);
TALLOC_FREE(reply);
num_received += 1;
}
result = true;
fail:
TALLOC_FREE(frame);
return result;
}
/*
* Get a db path
*/