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-rw-r--r--source3/lib/ctdbd_conn.c2341
1 files changed, 2341 insertions, 0 deletions
diff --git a/source3/lib/ctdbd_conn.c b/source3/lib/ctdbd_conn.c
new file mode 100644
index 0000000..9f8dce6
--- /dev/null
+++ b/source3/lib/ctdbd_conn.c
@@ -0,0 +1,2341 @@
+/*
+ Unix SMB/CIFS implementation.
+ Samba internal messaging functions
+ Copyright (C) 2007 by Volker Lendecke
+ Copyright (C) 2007 by Andrew Tridgell
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "replace.h"
+#include <tevent.h>
+#include "util_tdb.h"
+#include "serverid.h"
+#include "ctdbd_conn.h"
+#include "system/select.h"
+#include "lib/util/util_net.h"
+#include "lib/util/sys_rw_data.h"
+#include "lib/util/iov_buf.h"
+#include "lib/util/select.h"
+#include "lib/util/debug.h"
+#include "lib/util/talloc_stack.h"
+#include "lib/util/genrand.h"
+#include "lib/util/fault.h"
+#include "lib/util/dlinklist.h"
+#include "lib/util/tevent_unix.h"
+#include "lib/util/sys_rw.h"
+#include "lib/util/blocking.h"
+#include "ctdb/include/ctdb_protocol.h"
+#include "lib/async_req/async_sock.h"
+#include "lib/dbwrap/dbwrap.h"
+#include "lib/dbwrap/dbwrap_rbt.h"
+
+/* paths to these include files come from --with-ctdb= in configure */
+
+struct ctdbd_srvid_cb {
+ uint64_t srvid;
+ int (*cb)(struct tevent_context *ev,
+ uint32_t src_vnn, uint32_t dst_vnn,
+ uint64_t dst_srvid,
+ const uint8_t *msg, size_t msglen,
+ void *private_data);
+ void *private_data;
+};
+
+struct ctdbd_connection {
+ uint32_t reqid;
+ uint32_t our_vnn;
+ uint64_t rand_srvid;
+ struct ctdbd_srvid_cb *callbacks;
+ int fd;
+ int timeout;
+
+ /*
+ * Outgoing queue for writev_send of asynchronous ctdb requests
+ */
+ struct tevent_queue *outgoing;
+ struct tevent_req **pending;
+ struct tevent_req *read_req;
+};
+
+static bool ctdbd_conn_has_async_reqs(struct ctdbd_connection *conn)
+{
+ size_t len = talloc_array_length(conn->pending);
+ return (len != 0);
+}
+
+static uint32_t ctdbd_next_reqid(struct ctdbd_connection *conn)
+{
+ conn->reqid += 1;
+ if (conn->reqid == 0) {
+ conn->reqid += 1;
+ }
+ return conn->reqid;
+}
+
+static int ctdbd_control(struct ctdbd_connection *conn,
+ uint32_t vnn, uint32_t opcode,
+ uint64_t srvid, uint32_t flags,
+ TDB_DATA data,
+ TALLOC_CTX *mem_ctx, TDB_DATA *outdata,
+ int32_t *cstatus);
+
+/*
+ * exit on fatal communications errors with the ctdbd daemon
+ */
+static void cluster_fatal(const char *why)
+{
+ DEBUG(0,("cluster fatal event: %s - exiting immediately\n", why));
+ /* we don't use smb_panic() as we don't want to delay to write
+ a core file. We need to release this process id immediately
+ so that someone else can take over without getting sharing
+ violations */
+ _exit(1);
+}
+
+/*
+ *
+ */
+static void ctdb_packet_dump(struct ctdb_req_header *hdr)
+{
+ if (DEBUGLEVEL < 11) {
+ return;
+ }
+ DEBUGADD(11, ("len=%"PRIu32", magic=%"PRIu32", vers=%"PRIu32", "
+ "gen=%"PRIu32", op=%"PRIu32", reqid=%"PRIu32"\n",
+ hdr->length,
+ hdr->ctdb_magic,
+ hdr->ctdb_version,
+ hdr->generation,
+ hdr->operation,
+ hdr->reqid));
+}
+
+/*
+ * Register a srvid with ctdbd
+ */
+int register_with_ctdbd(struct ctdbd_connection *conn, uint64_t srvid,
+ int (*cb)(struct tevent_context *ev,
+ uint32_t src_vnn, uint32_t dst_vnn,
+ uint64_t dst_srvid,
+ const uint8_t *msg, size_t msglen,
+ void *private_data),
+ void *private_data)
+{
+ size_t num_callbacks = talloc_array_length(conn->callbacks);
+ struct ctdbd_srvid_cb *tmp;
+ bool need_register = true;
+ size_t i;
+
+ for (i = 0; i < num_callbacks; i++) {
+ struct ctdbd_srvid_cb *c = &conn->callbacks[i];
+
+ if (c->srvid == srvid) {
+ need_register = false;
+ break;
+ }
+ }
+
+ if (need_register) {
+ int ret;
+ int32_t cstatus;
+
+ ret = ctdbd_control_local(conn, CTDB_CONTROL_REGISTER_SRVID,
+ srvid, 0, tdb_null, NULL, NULL,
+ &cstatus);
+ if (ret != 0) {
+ return ret;
+ }
+ }
+
+
+ tmp = talloc_realloc(conn, conn->callbacks, struct ctdbd_srvid_cb,
+ num_callbacks + 1);
+ if (tmp == NULL) {
+ return ENOMEM;
+ }
+ conn->callbacks = tmp;
+
+ conn->callbacks[num_callbacks] = (struct ctdbd_srvid_cb) {
+ .srvid = srvid, .cb = cb, .private_data = private_data
+ };
+
+ return 0;
+}
+
+void deregister_from_ctdbd(struct ctdbd_connection *conn,
+ uint64_t srvid,
+ int (*cb)(struct tevent_context *ev,
+ uint32_t src_vnn,
+ uint32_t dst_vnn,
+ uint64_t dst_srvid,
+ const uint8_t *msg,
+ size_t msglen,
+ void *private_data),
+ void *private_data)
+{
+ struct ctdbd_srvid_cb *cbs = conn->callbacks;
+ size_t i, num_callbacks = talloc_array_length(cbs);
+ bool need_deregister = false;
+ bool keep_registration = false;
+
+ if (num_callbacks == 0) {
+ return;
+ }
+
+ for (i = 0; i < num_callbacks;) {
+ struct ctdbd_srvid_cb *c = &cbs[i];
+
+ if (c->srvid != srvid) {
+ i++;
+ continue;
+ }
+
+ if ((c->cb == cb) && (c->private_data == private_data)) {
+ need_deregister = true;
+ ARRAY_DEL_ELEMENT(cbs, i, num_callbacks);
+ num_callbacks--;
+ continue;
+ }
+
+ keep_registration = true;
+ i++;
+ }
+
+ conn->callbacks = talloc_realloc(conn,
+ cbs,
+ struct ctdbd_srvid_cb,
+ num_callbacks);
+
+ if (keep_registration) {
+ need_deregister = false;
+ }
+
+ if (need_deregister) {
+ int ret;
+ int32_t cstatus;
+
+ ret = ctdbd_control_local(conn, CTDB_CONTROL_DEREGISTER_SRVID,
+ srvid, 0, tdb_null, NULL, NULL,
+ &cstatus);
+ if (ret != 0) {
+ /*
+ * If CTDB_CONTROL_DEREGISTER_SRVID fails we may still
+ * get messages later, but we don't have a callback
+ * anymore, we just ignore these.
+ */
+ }
+ }
+
+ return;
+}
+
+static int ctdbd_msg_call_back(struct tevent_context *ev,
+ struct ctdbd_connection *conn,
+ struct ctdb_req_message_old *msg)
+{
+ uint32_t msg_len;
+ size_t i, num_callbacks;
+
+ msg_len = msg->hdr.length;
+ if (msg_len < offsetof(struct ctdb_req_message_old, data)) {
+ DBG_DEBUG("len %"PRIu32" too small\n", msg_len);
+ return 0;
+ }
+ msg_len -= offsetof(struct ctdb_req_message_old, data);
+
+ if (msg_len < msg->datalen) {
+ DBG_DEBUG("msg_len=%"PRIu32" < msg->datalen=%"PRIu32"\n",
+ msg_len, msg->datalen);
+ return 0;
+ }
+
+ num_callbacks = talloc_array_length(conn->callbacks);
+
+ for (i=0; i<num_callbacks; i++) {
+ struct ctdbd_srvid_cb *cb = &conn->callbacks[i];
+
+ if ((cb->srvid == msg->srvid) && (cb->cb != NULL)) {
+ int ret;
+
+ ret = cb->cb(ev,
+ msg->hdr.srcnode, msg->hdr.destnode,
+ msg->srvid, msg->data, msg->datalen,
+ cb->private_data);
+ if (ret != 0) {
+ return ret;
+ }
+ }
+ }
+ return 0;
+}
+
+/*
+ * get our vnn from the cluster
+ */
+static int get_cluster_vnn(struct ctdbd_connection *conn, uint32_t *vnn)
+{
+ int32_t cstatus=-1;
+ int ret;
+ ret = ctdbd_control_local(conn, CTDB_CONTROL_GET_PNN, 0, 0,
+ tdb_null, NULL, NULL, &cstatus);
+ if (ret != 0) {
+ DEBUG(1, ("ctdbd_control failed: %s\n", strerror(ret)));
+ return ret;
+ }
+ *vnn = (uint32_t)cstatus;
+ return ret;
+}
+
+static int ctdbd_control_get_nodemap(struct ctdbd_connection *conn,
+ TALLOC_CTX *mem_ctx,
+ struct ctdb_node_map_old **_nodemap)
+{
+ int32_t cstatus=-1;
+ TDB_DATA outdata = {0};
+ int ret;
+
+ ret = ctdbd_control_local(conn, CTDB_CONTROL_GET_NODEMAP, 0, 0,
+ tdb_null, mem_ctx, &outdata, &cstatus);
+ if (ret != 0) {
+ DEBUG(1, ("ctdbd_control failed: %s\n", strerror(ret)));
+ return ret;
+ }
+ if ((cstatus != 0) || (outdata.dptr == NULL)) {
+ DEBUG(2, ("Received invalid ctdb data\n"));
+ return EINVAL;
+ }
+
+ *_nodemap = (struct ctdb_node_map_old *)outdata.dptr;
+ return 0;
+}
+
+/*
+ * Are we active (i.e. not banned or stopped?)
+ */
+static bool ctdbd_working(struct ctdbd_connection *conn, uint32_t vnn)
+{
+ struct ctdb_node_map_old *m = NULL;
+ bool ok = false;
+ uint32_t i;
+ int ret;
+
+ ret = ctdbd_control_get_nodemap(conn, talloc_tos(), &m);
+ if (ret != 0) {
+ DEBUG(1, ("ctdbd_control_get_nodemap() failed: %s\n", strerror(ret)));
+ return false;
+ }
+
+ for (i=0; i<m->num; i++) {
+ if (vnn == m->nodes[i].pnn) {
+ break;
+ }
+ }
+
+ if (i == m->num) {
+ DEBUG(2, ("Did not find ourselves (node %d) in nodemap\n",
+ (int)vnn));
+ goto fail;
+ }
+
+ if ((m->nodes[i].flags & NODE_FLAGS_INACTIVE) != 0) {
+ DEBUG(2, ("Node has status %x, not active\n",
+ (int)m->nodes[i].flags));
+ goto fail;
+ }
+
+ ok = true;
+fail:
+ TALLOC_FREE(m);
+ return ok;
+}
+
+uint32_t ctdbd_vnn(const struct ctdbd_connection *conn)
+{
+ return conn->our_vnn;
+}
+
+/*
+ * Get us a ctdb connection
+ */
+
+static int ctdbd_connect(const char *sockname, int *pfd)
+{
+ struct samba_sockaddr addr = {
+ .sa_socklen = sizeof(struct sockaddr_un),
+ .u = {
+ .un = {
+ .sun_family = AF_UNIX,
+ },
+ },
+ };
+ int fd;
+ size_t namelen;
+ int ret;
+
+ fd = socket(AF_UNIX, SOCK_STREAM, 0);
+ if (fd == -1) {
+ int err = errno;
+ DEBUG(3, ("Could not create socket: %s\n", strerror(err)));
+ return err;
+ }
+
+ namelen = strlcpy(addr.u.un.sun_path,
+ sockname,
+ sizeof(addr.u.un.sun_path));
+ if (namelen >= sizeof(addr.u.un.sun_path)) {
+ DEBUG(3, ("%s: Socket name too long: %s\n", __func__,
+ sockname));
+ close(fd);
+ return ENAMETOOLONG;
+ }
+
+ ret = connect(fd, &addr.u.sa, addr.sa_socklen);
+ if (ret == -1) {
+ int err = errno;
+ DEBUG(1, ("connect(%s) failed: %s\n", sockname,
+ strerror(err)));
+ close(fd);
+ return err;
+ }
+
+ *pfd = fd;
+ return 0;
+}
+
+static int ctdb_read_packet(int fd, int timeout, TALLOC_CTX *mem_ctx,
+ struct ctdb_req_header **result)
+{
+ struct ctdb_req_header *req;
+ uint32_t msglen;
+ ssize_t nread;
+
+ if (timeout != -1) {
+ struct pollfd pfd = { .fd = fd, .events = POLLIN };
+ int ret;
+
+ ret = sys_poll_intr(&pfd, 1, timeout);
+ if (ret == -1) {
+ return errno;
+ }
+ if (ret == 0) {
+ return ETIMEDOUT;
+ }
+ if (ret != 1) {
+ return EIO;
+ }
+ }
+
+ nread = read_data(fd, &msglen, sizeof(msglen));
+ if (nread == -1) {
+ return errno;
+ }
+ if (nread == 0) {
+ return EIO;
+ }
+
+ if (msglen < sizeof(struct ctdb_req_header)) {
+ return EIO;
+ }
+
+ req = talloc_size(mem_ctx, msglen);
+ if (req == NULL) {
+ return ENOMEM;
+ }
+ talloc_set_name_const(req, "struct ctdb_req_header");
+
+ req->length = msglen;
+
+ nread = read_data(fd, ((char *)req) + sizeof(msglen),
+ msglen - sizeof(msglen));
+ if (nread == -1) {
+ TALLOC_FREE(req);
+ return errno;
+ }
+ if (nread == 0) {
+ TALLOC_FREE(req);
+ return EIO;
+ }
+
+ *result = req;
+ return 0;
+}
+
+/*
+ * Read a full ctdbd request. If we have a messaging context, defer incoming
+ * messages that might come in between.
+ */
+
+static int ctdb_read_req(struct ctdbd_connection *conn, uint32_t reqid,
+ TALLOC_CTX *mem_ctx, struct ctdb_req_header **result)
+{
+ struct ctdb_req_header *hdr = NULL;
+ int ret;
+
+ next_pkt:
+
+ ret = ctdb_read_packet(conn->fd, conn->timeout, mem_ctx, &hdr);
+ if (ret != 0) {
+ DBG_ERR("ctdb_read_packet failed: %s\n", strerror(ret));
+ cluster_fatal("failed to read data from ctdbd\n");
+ return -1;
+ }
+ SMB_ASSERT(hdr != NULL);
+
+ DEBUG(11, ("Received ctdb packet\n"));
+ ctdb_packet_dump(hdr);
+
+ if (hdr->operation == CTDB_REQ_MESSAGE) {
+ struct ctdb_req_message_old *msg = (struct ctdb_req_message_old *)hdr;
+
+ ret = ctdbd_msg_call_back(NULL, conn, msg);
+ if (ret != 0) {
+ TALLOC_FREE(hdr);
+ return ret;
+ }
+
+ TALLOC_FREE(hdr);
+ goto next_pkt;
+ }
+
+ if ((reqid != 0) && (hdr->reqid != reqid)) {
+ /* we got the wrong reply */
+ DEBUG(0,("Discarding mismatched ctdb reqid %u should have "
+ "been %u\n", hdr->reqid, reqid));
+ TALLOC_FREE(hdr);
+ goto next_pkt;
+ }
+
+ *result = talloc_move(mem_ctx, &hdr);
+
+ return 0;
+}
+
+static int ctdbd_connection_destructor(struct ctdbd_connection *c);
+
+/*
+ * Get us a ctdbd connection
+ */
+
+static int ctdbd_init_connection_internal(TALLOC_CTX *mem_ctx,
+ const char *sockname, int timeout,
+ struct ctdbd_connection *conn)
+{
+ int ret;
+
+ conn->timeout = timeout;
+ if (conn->timeout == 0) {
+ conn->timeout = -1;
+ }
+
+ ret = ctdbd_connect(sockname, &conn->fd);
+ if (ret != 0) {
+ DEBUG(1, ("ctdbd_connect failed: %s\n", strerror(ret)));
+ return ret;
+ }
+ talloc_set_destructor(conn, ctdbd_connection_destructor);
+
+ ret = get_cluster_vnn(conn, &conn->our_vnn);
+ if (ret != 0) {
+ DEBUG(10, ("get_cluster_vnn failed: %s\n", strerror(ret)));
+ return ret;
+ }
+
+ if (!ctdbd_working(conn, conn->our_vnn)) {
+ DEBUG(2, ("Node is not working, can not connect\n"));
+ return EIO;
+ }
+
+ generate_random_buffer((unsigned char *)&conn->rand_srvid,
+ sizeof(conn->rand_srvid));
+
+ ret = register_with_ctdbd(conn, conn->rand_srvid, NULL, NULL);
+ if (ret != 0) {
+ DEBUG(5, ("Could not register random srvid: %s\n",
+ strerror(ret)));
+ return ret;
+ }
+
+ return 0;
+}
+
+int ctdbd_init_connection(TALLOC_CTX *mem_ctx,
+ const char *sockname, int timeout,
+ struct ctdbd_connection **pconn)
+{
+ struct ctdbd_connection *conn;
+ int ret;
+
+ if (!(conn = talloc_zero(mem_ctx, struct ctdbd_connection))) {
+ DEBUG(0, ("talloc failed\n"));
+ return ENOMEM;
+ }
+
+ ret = ctdbd_init_connection_internal(mem_ctx,
+ sockname,
+ timeout,
+ conn);
+ if (ret != 0) {
+ DBG_ERR("ctdbd_init_connection_internal failed (%s)\n",
+ strerror(ret));
+ goto fail;
+ }
+
+ *pconn = conn;
+ return 0;
+
+ fail:
+ TALLOC_FREE(conn);
+ return ret;
+}
+
+int ctdbd_reinit_connection(TALLOC_CTX *mem_ctx,
+ const char *sockname, int timeout,
+ struct ctdbd_connection *conn)
+{
+ int ret;
+
+ ret = ctdbd_connection_destructor(conn);
+ if (ret != 0) {
+ DBG_ERR("ctdbd_connection_destructor failed\n");
+ return ret;
+ }
+
+ ret = ctdbd_init_connection_internal(mem_ctx,
+ sockname,
+ timeout,
+ conn);
+ if (ret != 0) {
+ DBG_ERR("ctdbd_init_connection_internal failed (%s)\n",
+ strerror(ret));
+ return ret;
+ }
+
+ return 0;
+}
+
+int ctdbd_init_async_connection(
+ TALLOC_CTX *mem_ctx,
+ const char *sockname,
+ int timeout,
+ struct ctdbd_connection **pconn)
+{
+ struct ctdbd_connection *conn = NULL;
+ int ret;
+
+ *pconn = NULL;
+
+ ret = ctdbd_init_connection(mem_ctx, sockname, timeout, &conn);
+ if (ret != 0) {
+ return ret;
+ }
+
+ ret = set_blocking(conn->fd, false);
+ if (ret == -1) {
+ int err = errno;
+ SMB_ASSERT(err != 0);
+ TALLOC_FREE(conn);
+ return err;
+ }
+
+ conn->outgoing = tevent_queue_create(conn, "ctdb async outgoing");
+ if (conn->outgoing == NULL) {
+ TALLOC_FREE(conn);
+ return ENOMEM;
+ }
+
+ *pconn = conn;
+ return 0;
+}
+
+int ctdbd_conn_get_fd(struct ctdbd_connection *conn)
+{
+ return conn->fd;
+}
+
+/*
+ * Packet handler to receive and handle a ctdb message
+ */
+static int ctdb_handle_message(struct tevent_context *ev,
+ struct ctdbd_connection *conn,
+ struct ctdb_req_header *hdr)
+{
+ struct ctdb_req_message_old *msg;
+
+ if (hdr->operation != CTDB_REQ_MESSAGE) {
+ DEBUG(0, ("Received async msg of type %u, discarding\n",
+ hdr->operation));
+ return EINVAL;
+ }
+
+ msg = (struct ctdb_req_message_old *)hdr;
+
+ ctdbd_msg_call_back(ev, conn, msg);
+
+ return 0;
+}
+
+void ctdbd_socket_readable(struct tevent_context *ev,
+ struct ctdbd_connection *conn)
+{
+ struct ctdb_req_header *hdr = NULL;
+ int ret;
+
+ ret = ctdb_read_packet(conn->fd, conn->timeout, talloc_tos(), &hdr);
+ if (ret != 0) {
+ DBG_ERR("ctdb_read_packet failed: %s\n", strerror(ret));
+ cluster_fatal("failed to read data from ctdbd\n");
+ }
+ SMB_ASSERT(hdr != NULL);
+
+ ret = ctdb_handle_message(ev, conn, hdr);
+
+ TALLOC_FREE(hdr);
+
+ if (ret != 0) {
+ DEBUG(10, ("could not handle incoming message: %s\n",
+ strerror(ret)));
+ }
+}
+
+int ctdbd_messaging_send_iov(struct ctdbd_connection *conn,
+ uint32_t dst_vnn, uint64_t dst_srvid,
+ const struct iovec *iov, int iovlen)
+{
+ struct ctdb_req_message_old r;
+ struct iovec iov2[iovlen+1];
+ size_t buflen = iov_buflen(iov, iovlen);
+ ssize_t nwritten;
+
+ r.hdr.length = offsetof(struct ctdb_req_message_old, data) + buflen;
+ r.hdr.ctdb_magic = CTDB_MAGIC;
+ r.hdr.ctdb_version = CTDB_PROTOCOL;
+ r.hdr.generation = 1;
+ r.hdr.operation = CTDB_REQ_MESSAGE;
+ r.hdr.destnode = dst_vnn;
+ r.hdr.srcnode = conn->our_vnn;
+ r.hdr.reqid = 0;
+ r.srvid = dst_srvid;
+ r.datalen = buflen;
+
+ DEBUG(10, ("ctdbd_messaging_send: Sending ctdb packet\n"));
+ ctdb_packet_dump(&r.hdr);
+
+ iov2[0].iov_base = &r;
+ iov2[0].iov_len = offsetof(struct ctdb_req_message_old, data);
+ memcpy(&iov2[1], iov, iovlen * sizeof(struct iovec));
+
+ nwritten = write_data_iov(conn->fd, iov2, iovlen+1);
+ if (nwritten == -1) {
+ DEBUG(3, ("write_data_iov failed: %s\n", strerror(errno)));
+ cluster_fatal("cluster dispatch daemon msg write error\n");
+ }
+
+ return 0;
+}
+
+/*
+ * send/recv a generic ctdb control message
+ */
+static int ctdbd_control(struct ctdbd_connection *conn,
+ uint32_t vnn, uint32_t opcode,
+ uint64_t srvid, uint32_t flags,
+ TDB_DATA data,
+ TALLOC_CTX *mem_ctx, TDB_DATA *outdata,
+ int32_t *cstatus)
+{
+ struct ctdb_req_control_old req;
+ struct ctdb_req_header *hdr;
+ struct ctdb_reply_control_old *reply = NULL;
+ struct iovec iov[2];
+ ssize_t nwritten;
+ int ret;
+
+ if (ctdbd_conn_has_async_reqs(conn)) {
+ /*
+ * Can't use sync call while an async call is in flight. Adding
+ * this check as a safety net. We'll be using different
+ * connections for sync and async requests, so this shouldn't
+ * happen, but who knows...
+ */
+ DBG_ERR("Async ctdb req on sync connection\n");
+ return EINVAL;
+ }
+
+ ZERO_STRUCT(req);
+ req.hdr.length = offsetof(struct ctdb_req_control_old, data) + data.dsize;
+ req.hdr.ctdb_magic = CTDB_MAGIC;
+ req.hdr.ctdb_version = CTDB_PROTOCOL;
+ req.hdr.operation = CTDB_REQ_CONTROL;
+ req.hdr.reqid = ctdbd_next_reqid(conn);
+ req.hdr.destnode = vnn;
+ req.opcode = opcode;
+ req.srvid = srvid;
+ req.datalen = data.dsize;
+ req.flags = flags;
+
+ DBG_DEBUG("Sending ctdb packet reqid=%"PRIu32", vnn=%"PRIu32", "
+ "opcode=%"PRIu32", srvid=%"PRIu64"\n", req.hdr.reqid,
+ req.hdr.destnode, req.opcode, req.srvid);
+ ctdb_packet_dump(&req.hdr);
+
+ iov[0].iov_base = &req;
+ iov[0].iov_len = offsetof(struct ctdb_req_control_old, data);
+ iov[1].iov_base = data.dptr;
+ iov[1].iov_len = data.dsize;
+
+ nwritten = write_data_iov(conn->fd, iov, ARRAY_SIZE(iov));
+ if (nwritten == -1) {
+ DEBUG(3, ("write_data_iov failed: %s\n", strerror(errno)));
+ cluster_fatal("cluster dispatch daemon msg write error\n");
+ }
+
+ if (flags & CTDB_CTRL_FLAG_NOREPLY) {
+ if (cstatus) {
+ *cstatus = 0;
+ }
+ return 0;
+ }
+
+ ret = ctdb_read_req(conn, req.hdr.reqid, NULL, &hdr);
+ if (ret != 0) {
+ DEBUG(10, ("ctdb_read_req failed: %s\n", strerror(ret)));
+ return ret;
+ }
+
+ if (hdr->operation != CTDB_REPLY_CONTROL) {
+ DEBUG(0, ("received invalid reply\n"));
+ TALLOC_FREE(hdr);
+ return EIO;
+ }
+ reply = (struct ctdb_reply_control_old *)hdr;
+
+ if (outdata) {
+ if (!(outdata->dptr = (uint8_t *)talloc_memdup(
+ mem_ctx, reply->data, reply->datalen))) {
+ TALLOC_FREE(reply);
+ return ENOMEM;
+ }
+ outdata->dsize = reply->datalen;
+ }
+ if (cstatus) {
+ (*cstatus) = reply->status;
+ }
+
+ TALLOC_FREE(reply);
+ return ret;
+}
+
+/*
+ * see if a remote process exists
+ */
+bool ctdbd_process_exists(struct ctdbd_connection *conn, uint32_t vnn,
+ pid_t pid, uint64_t unique_id)
+{
+ uint8_t buf[sizeof(pid)+sizeof(unique_id)];
+ int32_t cstatus = 0;
+ int ret;
+
+ if (unique_id == SERVERID_UNIQUE_ID_NOT_TO_VERIFY) {
+ ret = ctdbd_control(conn, vnn, CTDB_CONTROL_PROCESS_EXISTS,
+ 0, 0,
+ (TDB_DATA) { .dptr = (uint8_t *)&pid,
+ .dsize = sizeof(pid) },
+ NULL, NULL, &cstatus);
+ if (ret != 0) {
+ return false;
+ }
+ return (cstatus == 0);
+ }
+
+ memcpy(buf, &pid, sizeof(pid));
+ memcpy(buf+sizeof(pid), &unique_id, sizeof(unique_id));
+
+ ret = ctdbd_control(conn, vnn, CTDB_CONTROL_CHECK_PID_SRVID, 0, 0,
+ (TDB_DATA) { .dptr = buf, .dsize = sizeof(buf) },
+ NULL, NULL, &cstatus);
+ if (ret != 0) {
+ return false;
+ }
+ return (cstatus == 0);
+}
+
+/*
+ * Get a db path
+ */
+char *ctdbd_dbpath(struct ctdbd_connection *conn,
+ TALLOC_CTX *mem_ctx, uint32_t db_id)
+{
+ int ret;
+ TDB_DATA data;
+ TDB_DATA rdata = {0};
+ int32_t cstatus = 0;
+
+ data.dptr = (uint8_t*)&db_id;
+ data.dsize = sizeof(db_id);
+
+ ret = ctdbd_control_local(conn, CTDB_CONTROL_GETDBPATH, 0, 0, data,
+ mem_ctx, &rdata, &cstatus);
+ if ((ret != 0) || cstatus != 0) {
+ DEBUG(0, (__location__ " ctdb_control for getdbpath failed: %s\n",
+ strerror(ret)));
+ TALLOC_FREE(rdata.dptr);
+ }
+
+ return (char *)rdata.dptr;
+}
+
+/*
+ * attach to a ctdb database
+ */
+int ctdbd_db_attach(struct ctdbd_connection *conn,
+ const char *name, uint32_t *db_id, bool persistent)
+{
+ int ret;
+ TDB_DATA data = {0};
+ int32_t cstatus;
+
+ data = string_term_tdb_data(name);
+
+ ret = ctdbd_control_local(conn,
+ persistent
+ ? CTDB_CONTROL_DB_ATTACH_PERSISTENT
+ : CTDB_CONTROL_DB_ATTACH,
+ 0, 0, data, NULL, &data, &cstatus);
+ if (ret != 0) {
+ DEBUG(0, (__location__ " ctdb_control for db_attach "
+ "failed: %s\n", strerror(ret)));
+ return ret;
+ }
+
+ if (cstatus != 0 || data.dsize != sizeof(uint32_t)) {
+ DEBUG(0,(__location__ " ctdb_control for db_attach failed\n"));
+ TALLOC_FREE(data.dptr);
+ return EIO;
+ }
+
+ *db_id = *(uint32_t *)data.dptr;
+ talloc_free(data.dptr);
+
+ return 0;
+}
+
+/*
+ * force the migration of a record to this node
+ */
+int ctdbd_migrate(struct ctdbd_connection *conn, uint32_t db_id, TDB_DATA key)
+{
+ struct ctdb_req_call_old req;
+ struct ctdb_req_header *hdr = NULL;
+ struct iovec iov[2];
+ ssize_t nwritten;
+ int ret;
+
+ if (ctdbd_conn_has_async_reqs(conn)) {
+ /*
+ * Can't use sync call while an async call is in flight. Adding
+ * this check as a safety net. We'll be using different
+ * connections for sync and async requests, so this shouldn't
+ * happen, but who knows...
+ */
+ DBG_ERR("Async ctdb req on sync connection\n");
+ return EINVAL;
+ }
+
+ ZERO_STRUCT(req);
+
+ req.hdr.length = offsetof(struct ctdb_req_call_old, data) + key.dsize;
+ req.hdr.ctdb_magic = CTDB_MAGIC;
+ req.hdr.ctdb_version = CTDB_PROTOCOL;
+ req.hdr.operation = CTDB_REQ_CALL;
+ req.hdr.reqid = ctdbd_next_reqid(conn);
+ req.flags = CTDB_IMMEDIATE_MIGRATION;
+ req.callid = CTDB_NULL_FUNC;
+ req.db_id = db_id;
+ req.keylen = key.dsize;
+
+ DEBUG(10, ("ctdbd_migrate: Sending ctdb packet\n"));
+ ctdb_packet_dump(&req.hdr);
+
+ iov[0].iov_base = &req;
+ iov[0].iov_len = offsetof(struct ctdb_req_call_old, data);
+ iov[1].iov_base = key.dptr;
+ iov[1].iov_len = key.dsize;
+
+ nwritten = write_data_iov(conn->fd, iov, ARRAY_SIZE(iov));
+ if (nwritten == -1) {
+ DEBUG(3, ("write_data_iov failed: %s\n", strerror(errno)));
+ cluster_fatal("cluster dispatch daemon msg write error\n");
+ }
+
+ ret = ctdb_read_req(conn, req.hdr.reqid, NULL, &hdr);
+ if (ret != 0) {
+ DEBUG(10, ("ctdb_read_req failed: %s\n", strerror(ret)));
+ goto fail;
+ }
+
+ if (hdr->operation != CTDB_REPLY_CALL) {
+ if (hdr->operation == CTDB_REPLY_ERROR) {
+ DBG_ERR("received error from ctdb\n");
+ } else {
+ DBG_ERR("received invalid reply\n");
+ }
+ ret = EIO;
+ goto fail;
+ }
+
+ fail:
+
+ TALLOC_FREE(hdr);
+ return ret;
+}
+
+/*
+ * Fetch a record and parse it
+ */
+int ctdbd_parse(struct ctdbd_connection *conn, uint32_t db_id,
+ TDB_DATA key, bool local_copy,
+ void (*parser)(TDB_DATA key, TDB_DATA data,
+ void *private_data),
+ void *private_data)
+{
+ struct ctdb_req_call_old req;
+ struct ctdb_req_header *hdr = NULL;
+ struct ctdb_reply_call_old *reply;
+ struct iovec iov[2];
+ ssize_t nwritten;
+ uint32_t flags;
+ int ret;
+
+ if (ctdbd_conn_has_async_reqs(conn)) {
+ /*
+ * Can't use sync call while an async call is in flight. Adding
+ * this check as a safety net. We'll be using different
+ * connections for sync and async requests, so this shouldn't
+ * happen, but who knows...
+ */
+ DBG_ERR("Async ctdb req on sync connection\n");
+ return EINVAL;
+ }
+
+ flags = local_copy ? CTDB_WANT_READONLY : 0;
+
+ ZERO_STRUCT(req);
+
+ req.hdr.length = offsetof(struct ctdb_req_call_old, data) + key.dsize;
+ req.hdr.ctdb_magic = CTDB_MAGIC;
+ req.hdr.ctdb_version = CTDB_PROTOCOL;
+ req.hdr.operation = CTDB_REQ_CALL;
+ req.hdr.reqid = ctdbd_next_reqid(conn);
+ req.flags = flags;
+ req.callid = CTDB_FETCH_FUNC;
+ req.db_id = db_id;
+ req.keylen = key.dsize;
+
+ iov[0].iov_base = &req;
+ iov[0].iov_len = offsetof(struct ctdb_req_call_old, data);
+ iov[1].iov_base = key.dptr;
+ iov[1].iov_len = key.dsize;
+
+ nwritten = write_data_iov(conn->fd, iov, ARRAY_SIZE(iov));
+ if (nwritten == -1) {
+ DEBUG(3, ("write_data_iov failed: %s\n", strerror(errno)));
+ cluster_fatal("cluster dispatch daemon msg write error\n");
+ }
+
+ ret = ctdb_read_req(conn, req.hdr.reqid, NULL, &hdr);
+ if (ret != 0) {
+ DEBUG(10, ("ctdb_read_req failed: %s\n", strerror(ret)));
+ goto fail;
+ }
+
+ if ((hdr == NULL) || (hdr->operation != CTDB_REPLY_CALL)) {
+ DEBUG(0, ("received invalid reply\n"));
+ ret = EIO;
+ goto fail;
+ }
+ reply = (struct ctdb_reply_call_old *)hdr;
+
+ if (reply->datalen == 0) {
+ /*
+ * Treat an empty record as non-existing
+ */
+ ret = ENOENT;
+ goto fail;
+ }
+
+ parser(key, make_tdb_data(&reply->data[0], reply->datalen),
+ private_data);
+
+ ret = 0;
+ fail:
+ TALLOC_FREE(hdr);
+ return ret;
+}
+
+/*
+ Traverse a ctdb database. "conn" must be an otherwise unused
+ ctdb_connection where no other messages but the traverse ones are
+ expected.
+*/
+
+int ctdbd_traverse(struct ctdbd_connection *conn, uint32_t db_id,
+ void (*fn)(TDB_DATA key, TDB_DATA data,
+ void *private_data),
+ void *private_data)
+{
+ int ret;
+ TDB_DATA key, data;
+ struct ctdb_traverse_start t;
+ int32_t cstatus = 0;
+
+ if (ctdbd_conn_has_async_reqs(conn)) {
+ /*
+ * Can't use sync call while an async call is in flight. Adding
+ * this check as a safety net. We'll be using different
+ * connections for sync and async requests, so this shouldn't
+ * happen, but who knows...
+ */
+ DBG_ERR("Async ctdb req on sync connection\n");
+ return EINVAL;
+ }
+
+ t.db_id = db_id;
+ t.srvid = conn->rand_srvid;
+ t.reqid = ctdbd_next_reqid(conn);
+
+ data.dptr = (uint8_t *)&t;
+ data.dsize = sizeof(t);
+
+ ret = ctdbd_control_local(conn, CTDB_CONTROL_TRAVERSE_START,
+ conn->rand_srvid,
+ 0, data, NULL, NULL, &cstatus);
+
+ if ((ret != 0) || (cstatus != 0)) {
+ DEBUG(0,("ctdbd_control failed: %s, %d\n", strerror(ret),
+ cstatus));
+
+ if (ret == 0) {
+ /*
+ * We need a mapping here
+ */
+ ret = EIO;
+ }
+ return ret;
+ }
+
+ while (true) {
+ struct ctdb_req_header *hdr = NULL;
+ struct ctdb_req_message_old *m;
+ struct ctdb_rec_data_old *d;
+
+ ret = ctdb_read_packet(conn->fd, conn->timeout, conn, &hdr);
+ if (ret != 0) {
+ DBG_ERR("ctdb_read_packet failed: %s\n", strerror(ret));
+ cluster_fatal("failed to read data from ctdbd\n");
+ }
+ SMB_ASSERT(hdr != NULL);
+
+ if (hdr->operation != CTDB_REQ_MESSAGE) {
+ DEBUG(0, ("Got operation %u, expected a message\n",
+ (unsigned)hdr->operation));
+ return EIO;
+ }
+
+ m = (struct ctdb_req_message_old *)hdr;
+ d = (struct ctdb_rec_data_old *)&m->data[0];
+ if (m->datalen < sizeof(uint32_t) || m->datalen != d->length) {
+ DEBUG(0, ("Got invalid traverse data of length %d\n",
+ (int)m->datalen));
+ return EIO;
+ }
+
+ key.dsize = d->keylen;
+ key.dptr = &d->data[0];
+ data.dsize = d->datalen;
+ data.dptr = &d->data[d->keylen];
+
+ if (key.dsize == 0 && data.dsize == 0) {
+ /* end of traverse */
+ return 0;
+ }
+
+ if (data.dsize < sizeof(struct ctdb_ltdb_header)) {
+ DEBUG(0, ("Got invalid ltdb header length %d\n",
+ (int)data.dsize));
+ return EIO;
+ }
+ data.dsize -= sizeof(struct ctdb_ltdb_header);
+ data.dptr += sizeof(struct ctdb_ltdb_header);
+
+ if (fn != NULL) {
+ fn(key, data, private_data);
+ }
+ }
+ return 0;
+}
+
+/*
+ This is used to canonicalize a ctdb_sock_addr structure.
+*/
+static void smbd_ctdb_canonicalize_ip(const struct sockaddr_storage *in,
+ struct sockaddr_storage *out)
+{
+ memcpy(out, in, sizeof (*out));
+
+#ifdef HAVE_IPV6
+ if (in->ss_family == AF_INET6) {
+ const char prefix[12] = { 0,0,0,0,0,0,0,0,0,0,0xff,0xff };
+ const struct sockaddr_in6 *in6 =
+ (const struct sockaddr_in6 *)in;
+ struct sockaddr_in *out4 = (struct sockaddr_in *)out;
+ if (memcmp(&in6->sin6_addr, prefix, 12) == 0) {
+ memset(out, 0, sizeof(*out));
+#ifdef HAVE_SOCK_SIN_LEN
+ out4->sin_len = sizeof(*out);
+#endif
+ out4->sin_family = AF_INET;
+ out4->sin_port = in6->sin6_port;
+ memcpy(&out4->sin_addr, &in6->sin6_addr.s6_addr[12], 4);
+ }
+ }
+#endif
+}
+
+/*
+ * Register us as a server for a particular tcp connection
+ */
+
+int ctdbd_register_ips(struct ctdbd_connection *conn,
+ const struct sockaddr_storage *_server,
+ const struct sockaddr_storage *_client,
+ int (*cb)(struct tevent_context *ev,
+ uint32_t src_vnn, uint32_t dst_vnn,
+ uint64_t dst_srvid,
+ const uint8_t *msg, size_t msglen,
+ void *private_data),
+ void *private_data)
+{
+ struct ctdb_connection p;
+ TDB_DATA data = { .dptr = (uint8_t *)&p, .dsize = sizeof(p) };
+ int ret;
+ struct sockaddr_storage client;
+ struct sockaddr_storage server;
+
+ /*
+ * Only one connection so far
+ */
+
+ smbd_ctdb_canonicalize_ip(_client, &client);
+ smbd_ctdb_canonicalize_ip(_server, &server);
+
+ ZERO_STRUCT(p);
+ switch (client.ss_family) {
+ case AF_INET:
+ memcpy(&p.dst.ip, &server, sizeof(p.dst.ip));
+ memcpy(&p.src.ip, &client, sizeof(p.src.ip));
+ break;
+ case AF_INET6:
+ memcpy(&p.dst.ip6, &server, sizeof(p.dst.ip6));
+ memcpy(&p.src.ip6, &client, sizeof(p.src.ip6));
+ break;
+ default:
+ return EIO;
+ }
+
+ /*
+ * We want to be told about IP releases
+ */
+
+ ret = register_with_ctdbd(conn, CTDB_SRVID_RELEASE_IP,
+ cb, private_data);
+ if (ret != 0) {
+ return ret;
+ }
+
+ /*
+ * inform ctdb of our tcp connection, so if IP takeover happens ctdb
+ * can send an extra ack to trigger a reset for our client, so it
+ * immediately reconnects
+ */
+ ret = ctdbd_control_local(conn,
+ CTDB_CONTROL_TCP_CLIENT, 0,
+ CTDB_CTRL_FLAG_NOREPLY, data, NULL, NULL,
+ NULL);
+ if (ret != 0) {
+ return ret;
+ }
+ return 0;
+}
+
+void ctdbd_unregister_ips(struct ctdbd_connection *conn,
+ const struct sockaddr_storage *_server,
+ const struct sockaddr_storage *_client,
+ int (*cb)(struct tevent_context *ev,
+ uint32_t src_vnn,
+ uint32_t dst_vnn,
+ uint64_t dst_srvid,
+ const uint8_t *msg,
+ size_t msglen,
+ void *private_data),
+ void *private_data)
+{
+ struct ctdb_connection p;
+ TDB_DATA data = { .dptr = (uint8_t *)&p, .dsize = sizeof(p) };
+ int ret;
+ struct sockaddr_storage client;
+ struct sockaddr_storage server;
+
+ /*
+ * Only one connection so far
+ */
+
+ smbd_ctdb_canonicalize_ip(_client, &client);
+ smbd_ctdb_canonicalize_ip(_server, &server);
+
+ ZERO_STRUCT(p);
+ switch (client.ss_family) {
+ case AF_INET:
+ memcpy(&p.dst.ip, &server, sizeof(p.dst.ip));
+ memcpy(&p.src.ip, &client, sizeof(p.src.ip));
+ break;
+ case AF_INET6:
+ memcpy(&p.dst.ip6, &server, sizeof(p.dst.ip6));
+ memcpy(&p.src.ip6, &client, sizeof(p.src.ip6));
+ break;
+ default:
+ return;
+ }
+
+ /*
+ * We no longer want to be told about IP releases
+ * for the given callback/private_data combination
+ */
+ deregister_from_ctdbd(conn, CTDB_SRVID_RELEASE_IP,
+ cb, private_data);
+
+ /*
+ * inform ctdb of our tcp connection is no longer active
+ */
+ ret = ctdbd_control_local(conn,
+ CTDB_CONTROL_TCP_CLIENT_DISCONNECTED, 0,
+ CTDB_CTRL_FLAG_NOREPLY, data, NULL, NULL,
+ NULL);
+ if (ret != 0) {
+ /*
+ * We ignore errors here, as we'll just
+ * no longer have a callback handler
+ * registered and messages may just be ignored
+ */
+ }
+
+ return;
+}
+
+void ctdbd_passed_ips(struct ctdbd_connection *conn,
+ const struct sockaddr_storage *_server,
+ const struct sockaddr_storage *_client,
+ int (*cb)(struct tevent_context *ev,
+ uint32_t src_vnn,
+ uint32_t dst_vnn,
+ uint64_t dst_srvid,
+ const uint8_t *msg,
+ size_t msglen,
+ void *private_data),
+ void *private_data)
+{
+ struct ctdb_connection p;
+ TDB_DATA data = { .dptr = (uint8_t *)&p, .dsize = sizeof(p) };
+ int ret;
+ struct sockaddr_storage client;
+ struct sockaddr_storage server;
+
+ /*
+ * Only one connection so far
+ */
+
+ smbd_ctdb_canonicalize_ip(_client, &client);
+ smbd_ctdb_canonicalize_ip(_server, &server);
+
+ ZERO_STRUCT(p);
+ switch (client.ss_family) {
+ case AF_INET:
+ memcpy(&p.dst.ip, &server, sizeof(p.dst.ip));
+ memcpy(&p.src.ip, &client, sizeof(p.src.ip));
+ break;
+ case AF_INET6:
+ memcpy(&p.dst.ip6, &server, sizeof(p.dst.ip6));
+ memcpy(&p.src.ip6, &client, sizeof(p.src.ip6));
+ break;
+ default:
+ return;
+ }
+
+ /*
+ * We no longer want to be told about IP releases
+ * for the given callback/private_data combination
+ */
+ deregister_from_ctdbd(conn, CTDB_SRVID_RELEASE_IP,
+ cb, private_data);
+
+ /*
+ * inform ctdb of our tcp connection is now passed to
+ * another process.
+ */
+ ret = ctdbd_control_local(conn,
+ CTDB_CONTROL_TCP_CLIENT_PASSED, 0,
+ CTDB_CTRL_FLAG_NOREPLY, data, NULL, NULL,
+ NULL);
+ if (ret != 0) {
+ /*
+ * We ignore errors here, as we'll just
+ * no longer have a callback handler
+ * registered and messages may just be ignored
+ */
+ }
+
+ return;
+}
+
+static int ctdbd_control_get_public_ips(struct ctdbd_connection *conn,
+ uint32_t vnn,
+ uint32_t flags,
+ TALLOC_CTX *mem_ctx,
+ struct ctdb_public_ip_list_old **_ips)
+{
+ struct ctdb_public_ip_list_old *ips = NULL;
+ TDB_DATA outdata;
+ int32_t cstatus = -1;
+ size_t min_dsize;
+ size_t max_ips;
+ int ret;
+
+ *_ips = NULL;
+
+ ret = ctdbd_control(conn,
+ vnn,
+ CTDB_CONTROL_GET_PUBLIC_IPS,
+ 0, /* srvid */
+ flags,
+ tdb_null, /* indata */
+ mem_ctx,
+ &outdata,
+ &cstatus);
+ if (ret != 0 || cstatus != 0) {
+ DBG_ERR("ctdb_control for getpublicips failed ret:%d cstatus:%d\n",
+ ret, (int)cstatus);
+ return -1;
+ }
+
+ min_dsize = offsetof(struct ctdb_public_ip_list_old, ips);
+ if (outdata.dsize < min_dsize) {
+ DBG_ERR("outdata.dsize=%zu < min_dsize=%zu\n",
+ outdata.dsize, min_dsize);
+ return -1;
+ }
+ max_ips = (outdata.dsize - min_dsize)/sizeof(struct ctdb_public_ip);
+ ips = (struct ctdb_public_ip_list_old *)outdata.dptr;
+ if ((size_t)ips->num > max_ips) {
+ DBG_ERR("ips->num=%zu > max_ips=%zu\n",
+ (size_t)ips->num, max_ips);
+ return -1;
+ }
+
+ *_ips = ips;
+ return 0;
+}
+
+static struct samba_sockaddr ctdbd_sock_addr_to_samba(const ctdb_sock_addr *c)
+{
+ struct samba_sockaddr s = {};
+
+ switch (c->sa.sa_family) {
+ case AF_INET:
+ s.u.in = c->ip;
+ break;
+ case AF_INET6:
+ /*
+ * ctdb always requires HAVE_IPV6,
+ * so we don't need an ifdef here.
+ */
+ s.u.in6 = c->ip6;
+ break;
+ default:
+ /*
+ * ctdb_sock_addr only supports ipv4 and ipv6
+ */
+ smb_panic(__location__);
+ break;
+ }
+
+ return s;
+}
+
+int ctdbd_public_ip_foreach(struct ctdbd_connection *conn,
+ int (*cb)(uint32_t total_ip_count,
+ const struct sockaddr_storage *ip,
+ bool is_movable_ip,
+ void *private_data),
+ void *private_data)
+{
+ uint32_t i;
+ struct ctdb_public_ip_list_old *ips = NULL;
+ int ret = ENOMEM;
+ TALLOC_CTX *frame = talloc_stackframe();
+
+ ret = ctdbd_control_get_public_ips(conn, CTDB_CURRENT_NODE, 0, frame, &ips);
+ if (ret < 0) {
+ ret = EIO;
+ goto out_free;
+ }
+
+ for (i=0; i < ips->num; i++) {
+ const ctdb_sock_addr *addr = &ips->ips[i].addr;
+ struct samba_sockaddr tmp = ctdbd_sock_addr_to_samba(addr);
+
+ ret = cb(ips->num,
+ &tmp.u.ss,
+ true, /* all ctdb public ips are movable */
+ private_data);
+ if (ret != 0) {
+ goto out_free;
+ }
+ }
+
+ ret = 0;
+out_free:
+ TALLOC_FREE(frame);
+ return ret;
+}
+
+static int count_ips(struct db_record *rec, void *private_data)
+{
+ return 0;
+}
+
+static int collect_ips(struct db_record *rec, void *private_data)
+{
+ struct ctdb_public_ip_list_old *ips = talloc_get_type_abort(
+ private_data, struct ctdb_public_ip_list_old);
+ struct ctdb_public_ip *ip;
+ TDB_DATA val = dbwrap_record_get_value(rec);
+
+ SMB_ASSERT(val.dsize == sizeof(*ip));
+
+ ip = (struct ctdb_public_ip *)val.dptr;
+ ips->ips[ips->num] = *ip;
+ ips->num += 1;
+
+ return 0;
+}
+
+static int ctdbd_control_get_all_public_ips(struct ctdbd_connection *conn,
+ const struct ctdb_node_map_old *nodemap,
+ TALLOC_CTX *mem_ctx,
+ struct ctdb_public_ip_list_old **_ips)
+{
+ TALLOC_CTX *frame = talloc_stackframe();
+ uint32_t ni;
+ struct ctdb_public_ip_list_old *ips = NULL;
+ struct db_context *rbt = NULL;
+ NTSTATUS status;
+ size_t len;
+ int ret;
+ int count;
+
+ rbt = db_open_rbt(frame);
+ if (rbt == NULL) {
+ DBG_WARNING("db_open_rbt() failed\n");
+ TALLOC_FREE(frame);
+ return -1;
+ }
+
+ for (ni=0; ni < nodemap->num; ni++) {
+ const struct ctdb_node_and_flags *n = &nodemap->nodes[ni];
+ uint32_t j;
+
+ if (n->flags & NODE_FLAGS_INACTIVE) {
+ continue;
+ }
+
+ ret = ctdbd_control_get_public_ips(conn,
+ n->pnn,
+ 0,
+ frame,
+ &ips);
+ if (ret != 0) {
+ TALLOC_FREE(frame);
+ return -1;
+ }
+
+ for (j=0; j<ips->num; j++) {
+ struct ctdb_public_ip ip;
+ TDB_DATA key;
+ TDB_DATA val;
+
+ ip.pnn = ips->ips[j].pnn;
+ ip.addr = ips->ips[j].addr;
+
+ key = make_tdb_data((uint8_t *)&ip.addr, sizeof(ip.addr));
+ val = make_tdb_data((uint8_t *)&ip, sizeof(ip));
+
+ if (n->pnn == ip.pnn) {
+ /*
+ * Node claims IP is hosted on it, so
+ * save that information
+ */
+ status = dbwrap_store(rbt, key, val,
+ TDB_REPLACE);
+ if (!NT_STATUS_IS_OK(status)) {
+ TALLOC_FREE(frame);
+ return -1;
+ }
+ } else {
+ /*
+ * Node thinks IP is hosted elsewhere,
+ * so overwrite with CTDB_UNKNOWN_PNN
+ * if there's no existing entry
+ */
+ bool exists = dbwrap_exists(rbt, key);
+ if (!exists) {
+ ip.pnn = CTDB_UNKNOWN_PNN;
+ status = dbwrap_store(rbt, key, val,
+ TDB_INSERT);
+ if (!NT_STATUS_IS_OK(status)) {
+ TALLOC_FREE(frame);
+ return -1;
+ }
+ }
+ }
+ }
+
+ TALLOC_FREE(ips);
+ }
+
+ status = dbwrap_traverse_read(rbt, count_ips, NULL, &count);
+ if (!NT_STATUS_IS_OK(status)) {
+ TALLOC_FREE(frame);
+ return -1;
+ }
+
+ len = offsetof(struct ctdb_public_ip_list_old, ips) +
+ count*sizeof(struct ctdb_public_ip);
+ ips = talloc_zero_size(mem_ctx, len);
+ if (ips == NULL) {
+ TALLOC_FREE(frame);
+ return -1;
+ }
+ talloc_set_type(ips, struct ctdb_public_ip_list_old);
+ talloc_reparent(mem_ctx, frame, ips);
+
+ status = dbwrap_traverse_read(rbt, collect_ips, ips, &count);
+ if (!NT_STATUS_IS_OK(status)) {
+ TALLOC_FREE(frame);
+ return -1;
+ }
+
+ if ((unsigned int)count != ips->num) {
+ TALLOC_FREE(frame);
+ return -1;
+ }
+
+ *_ips = talloc_move(mem_ctx, &ips);
+ TALLOC_FREE(frame);
+ return 0;
+}
+
+/*
+ * This includes all node and/or public ips
+ * of the whole cluster.
+ *
+ * node ips have:
+ * - a valid pinned_pnn value.
+ * - current_pnn is valid if the node is healthy
+ *
+ * public ips have:
+ * - pinned_pnn as CTDB_UNKNOWN_PNN
+ * - current_pnn is valid if a node healthy and hosting this ip.
+ */
+int ctdbd_all_ip_foreach(struct ctdbd_connection *conn,
+ bool include_node_ips,
+ bool include_public_ips,
+ int (*cb)(uint32_t total_ip_count,
+ const struct sockaddr_storage *ip,
+ uint32_t pinned_pnn,
+ uint32_t current_pnn,
+ void *private_data),
+ void *private_data)
+{
+ TALLOC_CTX *frame = talloc_stackframe();
+ struct ctdb_node_map_old *nodemap = NULL;
+ struct ctdb_public_ip_list_old *ips = NULL;
+ int ret = ENOMEM;
+ uint32_t total_ip_count = 0;
+ uint32_t i;
+
+ ret = ctdbd_control_get_nodemap(conn, frame, &nodemap);
+ if (ret != 0) {
+ DBG_WARNING("ctdbd_control_get_nodemap() failed: %s\n", strerror(ret));
+ TALLOC_FREE(frame);
+ return -1;
+ }
+
+ for (i=0; include_node_ips && i < nodemap->num; i++) {
+ const struct ctdb_node_and_flags *n = &nodemap->nodes[i];
+
+ if (n->flags & NODE_FLAGS_DELETED) {
+ continue;
+ }
+
+ total_ip_count += 1;
+ }
+
+ if (include_public_ips) {
+ ret = ctdbd_control_get_all_public_ips(conn, nodemap,
+ frame, &ips);
+ if (ret < 0) {
+ ret = EIO;
+ goto out_free;
+ }
+
+ total_ip_count += ips->num;
+ }
+
+ for (i=0; include_node_ips && i < nodemap->num; i++) {
+ const struct ctdb_node_and_flags *n = &nodemap->nodes[i];
+ struct samba_sockaddr tmp = ctdbd_sock_addr_to_samba(&n->addr);
+ uint32_t pinned_pnn = n->pnn;
+ uint32_t current_pnn = n->pnn;
+
+ if (n->flags & NODE_FLAGS_DELETED) {
+ continue;
+ }
+
+ if (n->flags & (NODE_FLAGS_INACTIVE|NODE_FLAGS_DISABLED)) {
+ /*
+ * The ip address is not available
+ * unless the node is up and
+ * healthy.
+ */
+ current_pnn = CTDB_UNKNOWN_PNN;
+ }
+
+ ret = cb(total_ip_count,
+ &tmp.u.ss,
+ pinned_pnn,
+ current_pnn,
+ private_data);
+ if (ret != 0) {
+ goto out_free;
+ }
+ }
+
+ for (i=0; include_public_ips && i < ips->num; i++) {
+ const ctdb_sock_addr *addr = &ips->ips[i].addr;
+ struct samba_sockaddr tmp = ctdbd_sock_addr_to_samba(addr);
+ /* all ctdb public ips are movable and not pinned */
+ uint32_t pinned_pnn = CTDB_UNKNOWN_PNN;
+ uint32_t current_pnn = ips->ips[i].pnn;
+ uint32_t ni;
+
+ for (ni=0; ni < nodemap->num; ni++) {
+ const struct ctdb_node_and_flags *n = &nodemap->nodes[ni];
+
+ if (n->pnn != current_pnn) {
+ continue;
+ }
+
+ if (n->flags & (NODE_FLAGS_INACTIVE|NODE_FLAGS_DISABLED)) {
+ current_pnn = CTDB_UNKNOWN_PNN;
+ }
+ break;
+ }
+
+ ret = cb(total_ip_count,
+ &tmp.u.ss,
+ pinned_pnn,
+ current_pnn,
+ private_data);
+ if (ret != 0) {
+ goto out_free;
+ }
+ }
+
+ ret = 0;
+out_free:
+ TALLOC_FREE(frame);
+ return ret;
+}
+
+/*
+ call a control on the local node
+ */
+int ctdbd_control_local(struct ctdbd_connection *conn, uint32_t opcode,
+ uint64_t srvid, uint32_t flags, TDB_DATA data,
+ TALLOC_CTX *mem_ctx, TDB_DATA *outdata,
+ int32_t *cstatus)
+{
+ return ctdbd_control(conn, CTDB_CURRENT_NODE, opcode, srvid, flags, data,
+ mem_ctx, outdata, cstatus);
+}
+
+int ctdb_watch_us(struct ctdbd_connection *conn)
+{
+ struct ctdb_notify_data_old reg_data;
+ size_t struct_len;
+ int ret;
+ int32_t cstatus;
+
+ reg_data.srvid = CTDB_SRVID_SAMBA_NOTIFY;
+ reg_data.len = 1;
+ reg_data.notify_data[0] = 0;
+
+ struct_len = offsetof(struct ctdb_notify_data_old,
+ notify_data) + reg_data.len;
+
+ ret = ctdbd_control_local(
+ conn, CTDB_CONTROL_REGISTER_NOTIFY, conn->rand_srvid, 0,
+ make_tdb_data((uint8_t *)&reg_data, struct_len),
+ NULL, NULL, &cstatus);
+ if (ret != 0) {
+ DEBUG(1, ("ctdbd_control_local failed: %s\n",
+ strerror(ret)));
+ }
+ return ret;
+}
+
+int ctdb_unwatch(struct ctdbd_connection *conn)
+{
+ uint64_t srvid = CTDB_SRVID_SAMBA_NOTIFY;
+ int ret;
+ int32_t cstatus;
+
+ ret = ctdbd_control_local(
+ conn, CTDB_CONTROL_DEREGISTER_NOTIFY, conn->rand_srvid, 0,
+ make_tdb_data((uint8_t *)&srvid, sizeof(srvid)),
+ NULL, NULL, &cstatus);
+ if (ret != 0) {
+ DEBUG(1, ("ctdbd_control_local failed: %s\n",
+ strerror(ret)));
+ }
+ return ret;
+}
+
+int ctdbd_probe(const char *sockname, int timeout)
+{
+ /*
+ * Do a very early check if ctdbd is around to avoid an abort and core
+ * later
+ */
+ struct ctdbd_connection *conn = NULL;
+ int ret;
+
+ ret = ctdbd_init_connection(talloc_tos(), sockname, timeout,
+ &conn);
+
+ /*
+ * We only care if we can connect.
+ */
+ TALLOC_FREE(conn);
+
+ return ret;
+}
+
+static int ctdbd_connection_destructor(struct ctdbd_connection *c)
+{
+ if (c->fd != -1) {
+ close(c->fd);
+ c->fd = -1;
+ }
+ return 0;
+}
+
+void ctdbd_prep_hdr_next_reqid(
+ struct ctdbd_connection *conn, struct ctdb_req_header *hdr)
+{
+ *hdr = (struct ctdb_req_header) {
+ .ctdb_magic = CTDB_MAGIC,
+ .ctdb_version = CTDB_PROTOCOL,
+ .reqid = ctdbd_next_reqid(conn),
+ .destnode = CTDB_CURRENT_NODE,
+ };
+}
+
+struct ctdbd_pkt_read_state {
+ uint8_t *pkt;
+};
+
+static ssize_t ctdbd_pkt_read_more(
+ uint8_t *buf, size_t buflen, void *private_data);
+static void ctdbd_pkt_read_done(struct tevent_req *subreq);
+
+static struct tevent_req *ctdbd_pkt_read_send(
+ TALLOC_CTX *mem_ctx, struct tevent_context *ev, int fd)
+{
+ struct tevent_req *req = NULL, *subreq = NULL;
+ struct ctdbd_pkt_read_state *state = NULL;
+
+ req = tevent_req_create(mem_ctx, &state, struct ctdbd_pkt_read_state);
+ if (req == NULL) {
+ return NULL;
+ }
+ subreq = read_packet_send(state, ev, fd, 4, ctdbd_pkt_read_more, NULL);
+ if (tevent_req_nomem(subreq, req)) {
+ return tevent_req_post(req, ev);
+ }
+ tevent_req_set_callback(subreq, ctdbd_pkt_read_done, req);
+ return req;
+}
+
+static ssize_t ctdbd_pkt_read_more(
+ uint8_t *buf, size_t buflen, void *private_data)
+{
+ uint32_t msglen;
+ if (buflen < 4) {
+ return -1;
+ }
+ if (buflen > 4) {
+ return 0; /* Been here, done */
+ }
+ memcpy(&msglen, buf, 4);
+
+ if (msglen < sizeof(struct ctdb_req_header)) {
+ return -1;
+ }
+ return msglen - sizeof(msglen);
+}
+
+static void ctdbd_pkt_read_done(struct tevent_req *subreq)
+{
+ struct tevent_req *req = tevent_req_callback_data(
+ subreq, struct tevent_req);
+ struct ctdbd_pkt_read_state *state = tevent_req_data(
+ req, struct ctdbd_pkt_read_state);
+ ssize_t nread;
+ int err;
+
+ nread = read_packet_recv(subreq, state, &state->pkt, &err);
+ TALLOC_FREE(subreq);
+ if (nread == -1) {
+ tevent_req_error(req, err);
+ return;
+ }
+ tevent_req_done(req);
+}
+
+static int ctdbd_pkt_read_recv(
+ struct tevent_req *req, TALLOC_CTX *mem_ctx, uint8_t **pkt)
+{
+ struct ctdbd_pkt_read_state *state = tevent_req_data(
+ req, struct ctdbd_pkt_read_state);
+ int err;
+
+ if (tevent_req_is_unix_error(req, &err)) {
+ return err;
+ }
+ *pkt = talloc_move(mem_ctx, &state->pkt);
+ tevent_req_received(req);
+ return 0;
+}
+
+static bool ctdbd_conn_receive_next(struct ctdbd_connection *conn);
+static void ctdbd_conn_received(struct tevent_req *subreq);
+
+struct ctdbd_req_state {
+ struct ctdbd_connection *conn;
+ struct tevent_context *ev;
+ uint32_t reqid;
+ struct ctdb_req_header *reply;
+};
+
+static void ctdbd_req_unset_pending(struct tevent_req *req)
+{
+ struct ctdbd_req_state *state = tevent_req_data(
+ req, struct ctdbd_req_state);
+ struct ctdbd_connection *conn = state->conn;
+ size_t num_pending = talloc_array_length(conn->pending);
+ size_t i, num_after;
+
+ tevent_req_set_cleanup_fn(req, NULL);
+
+ if (num_pending == 1) {
+ /*
+ * conn->read_req is a child of conn->pending
+ */
+ TALLOC_FREE(conn->pending);
+ conn->read_req = NULL;
+ return;
+ }
+
+ for (i=0; i<num_pending; i++) {
+ if (req == conn->pending[i]) {
+ break;
+ }
+ }
+ if (i == num_pending) {
+ /*
+ * Something's seriously broken. Just returning here is the
+ * right thing nevertheless, the point of this routine is to
+ * remove ourselves from conn->pending.
+ */
+ return;
+ }
+
+ num_after = num_pending - i - 1;
+ if (num_after > 0) {
+ memmove(&conn->pending[i],
+ &conn->pending[i] + 1,
+ sizeof(*conn->pending) * num_after);
+ }
+ conn->pending = talloc_realloc(
+ NULL, conn->pending, struct tevent_req *, num_pending - 1);
+}
+
+static void ctdbd_req_cleanup(
+ struct tevent_req *req, enum tevent_req_state req_state)
+{
+ ctdbd_req_unset_pending(req);
+}
+
+static bool ctdbd_req_set_pending(struct tevent_req *req)
+{
+ struct ctdbd_req_state *state = tevent_req_data(
+ req, struct ctdbd_req_state);
+ struct ctdbd_connection *conn = state->conn;
+ struct tevent_req **pending = NULL;
+ size_t num_pending = talloc_array_length(conn->pending);
+ bool ok;
+
+ pending = talloc_realloc(
+ conn, conn->pending, struct tevent_req *, num_pending + 1);
+ if (pending == NULL) {
+ return false;
+ }
+ pending[num_pending] = req;
+ conn->pending = pending;
+
+ tevent_req_set_cleanup_fn(req, ctdbd_req_cleanup);
+
+ ok = ctdbd_conn_receive_next(conn);
+ if (!ok) {
+ ctdbd_req_unset_pending(req);
+ return false;
+ }
+
+ return true;
+}
+
+static bool ctdbd_conn_receive_next(struct ctdbd_connection *conn)
+{
+ size_t num_pending = talloc_array_length(conn->pending);
+ struct tevent_req *req = NULL;
+ struct ctdbd_req_state *state = NULL;
+
+ if (conn->read_req != NULL) {
+ return true;
+ }
+ if (num_pending == 0) {
+ /*
+ * done for now
+ */
+ return true;
+ }
+
+ req = conn->pending[0];
+ state = tevent_req_data(req, struct ctdbd_req_state);
+
+ conn->read_req = ctdbd_pkt_read_send(
+ conn->pending, state->ev, conn->fd);
+ if (conn->read_req == NULL) {
+ return false;
+ }
+ tevent_req_set_callback(conn->read_req, ctdbd_conn_received, conn);
+ return true;
+}
+
+static void ctdbd_conn_received(struct tevent_req *subreq)
+{
+ struct ctdbd_connection *conn = tevent_req_callback_data(
+ subreq, struct ctdbd_connection);
+ TALLOC_CTX *frame = talloc_stackframe();
+ uint8_t *pkt = NULL;
+ int ret;
+ struct ctdb_req_header *hdr = NULL;
+ uint32_t reqid;
+ struct tevent_req *req = NULL;
+ struct ctdbd_req_state *state = NULL;
+ size_t i, num_pending;
+ bool ok;
+
+ SMB_ASSERT(subreq == conn->read_req);
+ conn->read_req = NULL;
+
+ ret = ctdbd_pkt_read_recv(subreq, frame, &pkt);
+ TALLOC_FREE(subreq);
+ if (ret != 0) {
+ cluster_fatal("ctdbd_pkt_read failed\n");
+ }
+
+ hdr = (struct ctdb_req_header *)pkt;
+ reqid = hdr->reqid;
+ num_pending = talloc_array_length(conn->pending);
+
+ for (i=0; i<num_pending; i++) {
+ req = conn->pending[i];
+ state = tevent_req_data(req, struct ctdbd_req_state);
+ if (state->reqid == reqid) {
+ break;
+ }
+ }
+
+ if (i == num_pending) {
+ /* not found */
+ TALLOC_FREE(frame);
+ return;
+ }
+
+ state->reply = talloc_move(state, &hdr);
+ tevent_req_defer_callback(req, state->ev);
+ tevent_req_done(req);
+
+ TALLOC_FREE(frame);
+
+ ok = ctdbd_conn_receive_next(conn);
+ if (!ok) {
+ cluster_fatal("ctdbd_conn_receive_next failed\n");
+ }
+}
+
+static void ctdbd_req_written(struct tevent_req *subreq);
+
+struct tevent_req *ctdbd_req_send(
+ TALLOC_CTX *mem_ctx,
+ struct tevent_context *ev,
+ struct ctdbd_connection *conn,
+ struct iovec *iov,
+ size_t num_iov)
+{
+ struct tevent_req *req = NULL, *subreq = NULL;
+ struct ctdbd_req_state *state = NULL;
+ struct ctdb_req_header *hdr = NULL;
+ bool ok;
+
+ req = tevent_req_create(mem_ctx, &state, struct ctdbd_req_state);
+ if (req == NULL) {
+ return NULL;
+ }
+ state->conn = conn;
+ state->ev = ev;
+
+ if ((num_iov == 0) ||
+ (iov[0].iov_len < sizeof(struct ctdb_req_header))) {
+ tevent_req_error(req, EINVAL);
+ return tevent_req_post(req, ev);
+ }
+ hdr = iov[0].iov_base;
+ state->reqid = hdr->reqid;
+
+ ok = ctdbd_req_set_pending(req);
+ if (!ok) {
+ tevent_req_oom(req);
+ return tevent_req_post(req, ev);
+ }
+
+ subreq = writev_send(
+ state, ev, conn->outgoing, conn->fd, false, iov, num_iov);
+ if (tevent_req_nomem(subreq, req)) {
+ return tevent_req_post(req, ev);
+ }
+ tevent_req_set_callback(subreq, ctdbd_req_written, req);
+
+ return req;
+}
+
+static void ctdbd_req_written(struct tevent_req *subreq)
+{
+ struct tevent_req *req = tevent_req_callback_data(
+ subreq, struct tevent_req);
+ ssize_t nwritten;
+ int err;
+
+ nwritten = writev_recv(subreq, &err);
+ TALLOC_FREE(subreq);
+ if (nwritten == -1) {
+ tevent_req_error(req, err);
+ return;
+ }
+}
+
+int ctdbd_req_recv(
+ struct tevent_req *req,
+ TALLOC_CTX *mem_ctx,
+ struct ctdb_req_header **reply)
+{
+ struct ctdbd_req_state *state = tevent_req_data(
+ req, struct ctdbd_req_state);
+ int err;
+
+ if (tevent_req_is_unix_error(req, &err)) {
+ return err;
+ }
+ *reply = talloc_move(mem_ctx, &state->reply);
+ tevent_req_received(req);
+ return 0;
+}
+
+struct ctdbd_parse_state {
+ struct tevent_context *ev;
+ struct ctdbd_connection *conn;
+ uint32_t reqid;
+ TDB_DATA key;
+ uint8_t _keybuf[64];
+ struct ctdb_req_call_old ctdb_req;
+ struct iovec iov[2];
+ void (*parser)(TDB_DATA key,
+ TDB_DATA data,
+ void *private_data);
+ void *private_data;
+};
+
+static void ctdbd_parse_done(struct tevent_req *subreq);
+
+struct tevent_req *ctdbd_parse_send(TALLOC_CTX *mem_ctx,
+ struct tevent_context *ev,
+ struct ctdbd_connection *conn,
+ uint32_t db_id,
+ TDB_DATA key,
+ bool local_copy,
+ void (*parser)(TDB_DATA key,
+ TDB_DATA data,
+ void *private_data),
+ void *private_data,
+ enum dbwrap_req_state *req_state)
+{
+ struct tevent_req *req = NULL;
+ struct ctdbd_parse_state *state = NULL;
+ uint32_t flags;
+ uint32_t packet_length;
+ struct tevent_req *subreq = NULL;
+
+ req = tevent_req_create(mem_ctx, &state, struct ctdbd_parse_state);
+ if (req == NULL) {
+ *req_state = DBWRAP_REQ_ERROR;
+ return NULL;
+ }
+
+ *req_state = DBWRAP_REQ_DISPATCHED;
+
+ *state = (struct ctdbd_parse_state) {
+ .ev = ev,
+ .conn = conn,
+ .reqid = ctdbd_next_reqid(conn),
+ .parser = parser,
+ .private_data = private_data,
+ };
+
+ flags = local_copy ? CTDB_WANT_READONLY : 0;
+ packet_length = offsetof(struct ctdb_req_call_old, data) + key.dsize;
+
+ /*
+ * Copy the key into our state, as ctdb_pkt_send_cleanup() requires that
+ * all passed iov elements have a lifetime longer that the tevent_req
+ * returned by ctdb_pkt_send_send(). This is required continue sending a
+ * the low level request into the ctdb socket, if a higher level
+ * ('this') request is canceled (or talloc free'd) by the application
+ * layer, without sending invalid packets to ctdb.
+ */
+ if (key.dsize > sizeof(state->_keybuf)) {
+ state->key.dptr = talloc_memdup(state, key.dptr, key.dsize);
+ if (tevent_req_nomem(state->key.dptr, req)) {
+ return tevent_req_post(req, ev);
+ }
+ } else {
+ memcpy(state->_keybuf, key.dptr, key.dsize);
+ state->key.dptr = state->_keybuf;
+ }
+ state->key.dsize = key.dsize;
+
+ state->ctdb_req.hdr.length = packet_length;
+ state->ctdb_req.hdr.ctdb_magic = CTDB_MAGIC;
+ state->ctdb_req.hdr.ctdb_version = CTDB_PROTOCOL;
+ state->ctdb_req.hdr.operation = CTDB_REQ_CALL;
+ state->ctdb_req.hdr.reqid = state->reqid;
+ state->ctdb_req.flags = flags;
+ state->ctdb_req.callid = CTDB_FETCH_FUNC;
+ state->ctdb_req.db_id = db_id;
+ state->ctdb_req.keylen = state->key.dsize;
+
+ state->iov[0].iov_base = &state->ctdb_req;
+ state->iov[0].iov_len = offsetof(struct ctdb_req_call_old, data);
+ state->iov[1].iov_base = state->key.dptr;
+ state->iov[1].iov_len = state->key.dsize;
+
+ subreq = ctdbd_req_send(
+ state, ev, conn, state->iov, ARRAY_SIZE(state->iov));
+ if (tevent_req_nomem(subreq, req)) {
+ *req_state = DBWRAP_REQ_ERROR;
+ return tevent_req_post(req, ev);
+ }
+ tevent_req_set_callback(subreq, ctdbd_parse_done, req);
+
+ return req;
+}
+
+static void ctdbd_parse_done(struct tevent_req *subreq)
+{
+ struct tevent_req *req = tevent_req_callback_data(
+ subreq, struct tevent_req);
+ struct ctdbd_parse_state *state = tevent_req_data(
+ req, struct ctdbd_parse_state);
+ struct ctdb_req_header *hdr = NULL;
+ struct ctdb_reply_call_old *reply = NULL;
+ int ret;
+
+ ret = ctdbd_req_recv(subreq, state, &hdr);
+ TALLOC_FREE(subreq);
+ if (tevent_req_error(req, ret)) {
+ DBG_DEBUG("ctdb_req_recv failed %s\n", strerror(ret));
+ return;
+ }
+ SMB_ASSERT(hdr != NULL);
+
+ if (hdr->operation != CTDB_REPLY_CALL) {
+ DBG_ERR("received invalid reply\n");
+ ctdb_packet_dump(hdr);
+ tevent_req_error(req, EIO);
+ return;
+ }
+
+ reply = (struct ctdb_reply_call_old *)hdr;
+
+ if (reply->datalen == 0) {
+ /*
+ * Treat an empty record as non-existing
+ */
+ tevent_req_error(req, ENOENT);
+ return;
+ }
+
+ state->parser(state->key,
+ make_tdb_data(&reply->data[0], reply->datalen),
+ state->private_data);
+
+ tevent_req_done(req);
+ return;
+}
+
+int ctdbd_parse_recv(struct tevent_req *req)
+{
+ return tevent_req_simple_recv_unix(req);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-20 10:04:18 +0000