1 files changed, 0 insertions, 462 deletions
diff --git a/source4/cluster/ctdb/server/ctdb_traverse.c b/source4/cluster/ctdb/server/ctdb_traverse.c
deleted file mode 100644
index d735594e73..0000000000
--- a/source4/cluster/ctdb/server/ctdb_traverse.c
+++ /dev/null
@@ -1,462 +0,0 @@
-/* 
-   efficient async ctdb traverse
-
-   Copyright (C) Andrew Tridgell  2007
-
-   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 "includes.h"
-#include "lib/events/events.h"
-#include "system/filesys.h"
-#include "system/wait.h"
-#include "../tdb/include/tdb.h"
-#include "../include/ctdb_private.h"
-
-typedef void (*ctdb_traverse_fn_t)(void *private_data, TDB_DATA key, TDB_DATA data);
-
-/*
-  handle returned to caller - freeing this handler will kill the child and 
-  terminate the traverse
- */
-struct ctdb_traverse_local_handle {
-	struct ctdb_db_context *ctdb_db;
-	int fd[2];
-	pid_t child;
-	void *private_data;
-	ctdb_traverse_fn_t callback;
-	struct timeval start_time;
-	struct ctdb_queue *queue;
-};
-
-/*
-  called when data is available from the child
- */
-static void ctdb_traverse_local_handler(uint8_t *rawdata, size_t length, void *private_data)
-{
-	struct ctdb_traverse_local_handle *h = talloc_get_type(private_data, 
-							       struct ctdb_traverse_local_handle);
-	TDB_DATA key, data;
-	ctdb_traverse_fn_t callback = h->callback;
-	void *p = h->private_data;
-	struct ctdb_rec_data *tdata = (struct ctdb_rec_data *)rawdata;
-
-	if (rawdata == NULL || length < 4 || length != tdata->length) {
-		/* end of traverse */
-		talloc_free(h);
-		callback(p, tdb_null, tdb_null);
-		return;
-	}
-
-	key.dsize = tdata->keylen;
-	key.dptr  = &tdata->data[0];
-	data.dsize = tdata->datalen;
-	data.dptr = &tdata->data[tdata->keylen];
-
-	callback(p, key, data);	
-}
-
-/*
-  destroy a in-flight traverse operation
- */
-static int traverse_local_destructor(struct ctdb_traverse_local_handle *h)
-{
-	kill(h->child, SIGKILL);
-	waitpid(h->child, NULL, 0);
-	return 0;
-}
-
-/*
-  callback from tdb_traverse_read()
- */
-static int ctdb_traverse_local_fn(struct tdb_context *tdb, TDB_DATA key, TDB_DATA data, void *p)
-{
-	struct ctdb_traverse_local_handle *h = talloc_get_type(p, 
-							       struct ctdb_traverse_local_handle);
-	struct ctdb_rec_data *d;
-	struct ctdb_ltdb_header *hdr;
-
-	/* filter out non-authoritative and zero-length records */
-	hdr = (struct ctdb_ltdb_header *)data.dptr;
-	if (data.dsize <= sizeof(struct ctdb_ltdb_header) ||
-	    hdr->dmaster != h->ctdb_db->ctdb->vnn) {
-		return 0;
-	}
-
-	d = ctdb_marshall_record(h, 0, key, data);
-	if (d == NULL) {
-		/* error handling is tricky in this child code .... */
-		return -1;
-	}
-
-	if (write(h->fd[1], (uint8_t *)d, d->length) != d->length) {
-		return -1;
-	}
-	return 0;
-}
-
-
-/*
-  setup a non-blocking traverse of a local ltdb. The callback function
-  will be called on every record in the local ltdb. To stop the
-  travserse, talloc_free() the travserse_handle.
-
-  The traverse is finished when the callback is called with tdb_null for key and data
- */
-static struct ctdb_traverse_local_handle *ctdb_traverse_local(struct ctdb_db_context *ctdb_db,
-							      ctdb_traverse_fn_t callback,
-							      void *private_data)
-{
-	struct ctdb_traverse_local_handle *h;
-	int ret;
-
-	h = talloc_zero(ctdb_db, struct ctdb_traverse_local_handle);
-	if (h == NULL) {
-		return NULL;
-	}
-
-	ret = pipe(h->fd);
-
-	if (ret != 0) {
-		talloc_free(h);
-		return NULL;
-	}
-
-	h->child = fork();
-
-	if (h->child == (pid_t)-1) {
-		close(h->fd[0]);
-		close(h->fd[1]);
-		talloc_free(h);
-		return NULL;
-	}
-
-	h->callback = callback;
-	h->private_data = private_data;
-	h->ctdb_db = ctdb_db;
-
-	if (h->child == 0) {
-		/* start the traverse in the child */
-		close(h->fd[0]);
-		tdb_traverse_read(ctdb_db->ltdb->tdb, ctdb_traverse_local_fn, h);
-		_exit(0);
-	}
-
-	close(h->fd[1]);
-	talloc_set_destructor(h, traverse_local_destructor);
-
-	/*
-	  setup a packet queue between the child and the parent. This
-	  copes with all the async and packet boundary issues
-	 */
-	h->queue = ctdb_queue_setup(ctdb_db->ctdb, h, h->fd[0], 0, ctdb_traverse_local_handler, h);
-	if (h->queue == NULL) {
-		talloc_free(h);
-		return NULL;
-	}
-
-	h->start_time = timeval_current();
-
-	return h;
-}
-
-
-struct ctdb_traverse_all_handle {
-	struct ctdb_context *ctdb;
-	uint32_t reqid;
-	ctdb_traverse_fn_t callback;
-	void *private_data;
-	uint32_t null_count;
-};
-
-/*
-  destroy a traverse_all op
- */
-static int ctdb_traverse_all_destructor(struct ctdb_traverse_all_handle *state)
-{
-	ctdb_reqid_remove(state->ctdb, state->reqid);
-	return 0;
-}
-
-struct ctdb_traverse_all {
-	uint32_t db_id;
-	uint32_t reqid;
-	uint32_t vnn;
-};
-
-/* called when a traverse times out */
-static void ctdb_traverse_all_timeout(struct event_context *ev, struct timed_event *te, 
-				      struct timeval t, void *private_data)
-{
-	struct ctdb_traverse_all_handle *state = talloc_get_type(private_data, struct ctdb_traverse_all_handle);
-
-	state->ctdb->statistics.timeouts.traverse++;
-
-	state->callback(state->private_data, tdb_null, tdb_null);
-	talloc_free(state);
-}
-
-/*
-  setup a cluster-wide non-blocking traverse of a ctdb. The
-  callback function will be called on every record in the local
-  ltdb. To stop the travserse, talloc_free() the traverse_handle.
-
-  The traverse is finished when the callback is called with tdb_null
-  for key and data
- */
-static struct ctdb_traverse_all_handle *ctdb_daemon_traverse_all(struct ctdb_db_context *ctdb_db,
-								 ctdb_traverse_fn_t callback,
-								 void *private_data)
-{
-	struct ctdb_traverse_all_handle *state;
-	struct ctdb_context *ctdb = ctdb_db->ctdb;
-	int ret;
-	TDB_DATA data;
-	struct ctdb_traverse_all r;
-
-	state = talloc(ctdb_db, struct ctdb_traverse_all_handle);
-	if (state == NULL) {
-		return NULL;
-	}
-
-	state->ctdb = ctdb;
-	state->reqid = ctdb_reqid_new(ctdb_db->ctdb, state);
-	state->callback = callback;
-	state->private_data = private_data;
-	state->null_count = 0;
-	
-	talloc_set_destructor(state, ctdb_traverse_all_destructor);
-
-	r.db_id = ctdb_db->db_id;
-	r.reqid = state->reqid;
-	r.vnn   = ctdb->vnn;
-
-	data.dptr = (uint8_t *)&r;
-	data.dsize = sizeof(r);
-
-	/* tell all the nodes in the cluster to start sending records to this node */
-	ret = ctdb_daemon_send_control(ctdb, CTDB_BROADCAST_VNNMAP, 0, 
-				       CTDB_CONTROL_TRAVERSE_ALL,
-				       0, CTDB_CTRL_FLAG_NOREPLY, data, NULL, NULL);
-	if (ret != 0) {
-		talloc_free(state);
-		return NULL;
-	}
-
-	/* timeout the traverse */
-	event_add_timed(ctdb->ev, state, 
-			timeval_current_ofs(ctdb->tunable.traverse_timeout, 0), 
-			ctdb_traverse_all_timeout, state);
-
-	return state;
-}
-
-struct traverse_all_state {
-	struct ctdb_context *ctdb;
-	struct ctdb_traverse_local_handle *h;
-	uint32_t reqid;
-	uint32_t srcnode;
-};
-
-/*
-  called for each record during a traverse all 
- */
-static void traverse_all_callback(void *p, TDB_DATA key, TDB_DATA data)
-{
-	struct traverse_all_state *state = talloc_get_type(p, struct traverse_all_state);
-	int ret;
-	struct ctdb_rec_data *d;
-	TDB_DATA cdata;
-
-	d = ctdb_marshall_record(state, state->reqid, key, data);
-	if (d == NULL) {
-		/* darn .... */
-		DEBUG(0,("Out of memory in traverse_all_callback\n"));
-		return;
-	}
-
-	cdata.dptr = (uint8_t *)d;
-	cdata.dsize = d->length;
-
-	ret = ctdb_daemon_send_control(state->ctdb, state->srcnode, 0, CTDB_CONTROL_TRAVERSE_DATA,
-				       0, CTDB_CTRL_FLAG_NOREPLY, cdata, NULL, NULL);
-	if (ret != 0) {
-		DEBUG(0,("Failed to send traverse data\n"));
-	}
-
-	if (key.dsize == 0 && data.dsize == 0) {
-		/* we're done */
-		talloc_free(state);
-	}
-}
-
-/*
-  called when a CTDB_CONTROL_TRAVERSE_ALL control comes in. We then
-  setup a traverse of our local ltdb, sending the records as
-  CTDB_CONTROL_TRAVERSE_DATA records back to the originator
- */
-int32_t ctdb_control_traverse_all(struct ctdb_context *ctdb, TDB_DATA data, TDB_DATA *outdata)
-{
-	struct ctdb_traverse_all *c = (struct ctdb_traverse_all *)data.dptr;
-	struct traverse_all_state *state;
-	struct ctdb_db_context *ctdb_db;
-
-	if (data.dsize != sizeof(struct ctdb_traverse_all)) {
-		DEBUG(0,("Invalid size in ctdb_control_traverse_all\n"));
-		return -1;
-	}
-
-	ctdb_db = find_ctdb_db(ctdb, c->db_id);
-	if (ctdb_db == NULL) {
-		return -1;
-	}
-
-	state = talloc(ctdb_db, struct traverse_all_state);
-	if (state == NULL) {
-		return -1;
-	}
-
-	state->reqid = c->reqid;
-	state->srcnode = c->vnn;
-	state->ctdb = ctdb;
-
-	state->h = ctdb_traverse_local(ctdb_db, traverse_all_callback, state);
-	if (state->h == NULL) {
-		talloc_free(state);
-		return -1;
-	}
-
-	return 0;
-}
-
-
-/*
-  called when a CTDB_CONTROL_TRAVERSE_DATA control comes in. We then
-  call the traverse_all callback with the record
- */
-int32_t ctdb_control_traverse_data(struct ctdb_context *ctdb, TDB_DATA data, TDB_DATA *outdata)
-{
-	struct ctdb_rec_data *d = (struct ctdb_rec_data *)data.dptr;
-	struct ctdb_traverse_all_handle *state;
-	TDB_DATA key;
-	ctdb_traverse_fn_t callback;
-	void *private_data;
-
-	if (data.dsize < sizeof(uint32_t) || data.dsize != d->length) {
-		DEBUG(0,("Bad record size in ctdb_control_traverse_data\n"));
-		return -1;
-	}
-
-	state = ctdb_reqid_find(ctdb, d->reqid, struct ctdb_traverse_all_handle);
-	if (state == NULL || d->reqid != state->reqid) {
-		/* traverse might have been terminated already */
-		return -1;
-	}
-
-	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) {
-		state->null_count++;
-		if (state->null_count != ctdb_get_num_active_nodes(ctdb)) {
-			return 0;
-		}
-	}
-
-	callback = state->callback;
-	private_data = state->private_data;
-
-	callback(private_data, key, data);
-	if (key.dsize == 0 && data.dsize == 0) {
-		/* we've received all of the null replies, so all
-		   nodes are finished */
-		talloc_free(state);
-	}
-	return 0;
-}	
-
-struct traverse_start_state {
-	struct ctdb_context *ctdb;
-	struct ctdb_traverse_all_handle *h;
-	uint32_t srcnode;
-	uint32_t reqid;
-	uint64_t srvid;
-};
-
-/*
-  callback which sends records as messages to the client
- */
-static void traverse_start_callback(void *p, TDB_DATA key, TDB_DATA data)
-{
-	struct traverse_start_state *state;
-	struct ctdb_rec_data *d;
-	TDB_DATA cdata;
-
-	state = talloc_get_type(p, struct traverse_start_state);
-
-	d = ctdb_marshall_record(state, state->reqid, key, data);
-	if (d == NULL) {
-		return;
-	}
-
-	cdata.dptr = (uint8_t *)d;
-	cdata.dsize = d->length;
-
-	ctdb_dispatch_message(state->ctdb, state->srvid, cdata);
-	if (key.dsize == 0 && data.dsize == 0) {
-		/* end of traverse */
-		talloc_free(state);
-	}
-}
-
-/*
-  start a traverse_all - called as a control from a client
- */
-int32_t ctdb_control_traverse_start(struct ctdb_context *ctdb, TDB_DATA data, 
-				    TDB_DATA *outdata, uint32_t srcnode)
-{
-	struct ctdb_traverse_start *d = (struct ctdb_traverse_start *)data.dptr;
-	struct traverse_start_state *state;
-	struct ctdb_db_context *ctdb_db;
-
-	if (data.dsize != sizeof(*d)) {
-		DEBUG(0,("Bad record size in ctdb_control_traverse_start\n"));
-		return -1;
-	}
-
-	ctdb_db = find_ctdb_db(ctdb, d->db_id);
-	if (ctdb_db == NULL) {
-		return -1;
-	}
-
-	state = talloc(ctdb_db, struct traverse_start_state);
-	if (state == NULL) {
-		return -1;
-	}
-	
-	state->srcnode = srcnode;
-	state->reqid = d->reqid;
-	state->srvid = d->srvid;
-	state->ctdb = ctdb;
-
-	state->h = ctdb_daemon_traverse_all(ctdb_db, traverse_start_callback, state);
-	if (state->h == NULL) {
-		talloc_free(state);
-		return -1;
-	}
-
-	return 0;
-}