Adding upstream version 2:4.20.0+dfsg.upstream/2%4.20.0+dfsg

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 681 insertions, 0 deletions

diff --git a/ctdb/common/ctdb_util.c b/ctdb/common/ctdb_util.c
new file mode 100644
index 0000000..5c7731c
--- /dev/null
+++ b/ctdb/common/ctdb_util.c
@@ -0,0 +1,681 @@
+/* 
+   ctdb utility code
+
+   Copyright (C) Andrew Tridgell  2006
+
+   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 "system/network.h"
+#include "system/filesys.h"
+#include "system/wait.h"
+
+#include <tdb.h>
+
+#include "lib/util/debug.h"
+#include "lib/util/samba_util.h"
+
+#include "ctdb_private.h"
+
+#include "protocol/protocol_util.h"
+
+#include "common/reqid.h"
+#include "common/system.h"
+#include "common/common.h"
+#include "common/logging.h"
+
+/*
+  return error string for last error
+*/
+const char *ctdb_errstr(struct ctdb_context *ctdb)
+{
+	return ctdb->err_msg;
+}
+
+
+/*
+  remember an error message
+*/
+void ctdb_set_error(struct ctdb_context *ctdb, const char *fmt, ...)
+{
+	va_list ap;
+	talloc_free(ctdb->err_msg);
+	va_start(ap, fmt);
+	ctdb->err_msg = talloc_vasprintf(ctdb, fmt, ap);
+	DEBUG(DEBUG_ERR,("ctdb error: %s\n", ctdb->err_msg));
+	va_end(ap);
+}
+
+/*
+  a fatal internal error occurred - no hope for recovery
+*/
+void ctdb_fatal(struct ctdb_context *ctdb, const char *msg)
+{
+	DEBUG(DEBUG_ALERT,("ctdb fatal error: %s\n", msg));
+	abort();
+}
+
+/*
+  like ctdb_fatal() but a core/backtrace would not be useful
+*/
+void ctdb_die(struct ctdb_context *ctdb, const char *msg)
+{
+	DEBUG(DEBUG_ALERT,("ctdb exiting with error: %s\n", msg));
+	exit(1);
+}
+
+/* Set the path of a helper program from envvar, falling back to
+ * dir/file if envvar unset. type is a string to print in log
+ * messages.  helper is assumed to point to a statically allocated
+ * array of size bytes, initialised to "".  If file is NULL don't fall
+ * back if envvar is unset.  If dir is NULL and envvar is unset (but
+ * file is not NULL) then this is an error.  Returns true if helper is
+ * set, either previously or this time. */
+bool ctdb_set_helper(const char *type, char *helper, size_t size,
+		     const char *envvar,
+		     const char *dir, const char *file)
+{
+	const char *t;
+	struct stat st;
+
+	if (helper[0] != '\0') {
+		/* Already set */
+		return true;
+	}
+
+	t = getenv(envvar);
+	if (t != NULL) {
+		if (strlen(t) >= size) {
+			DEBUG(DEBUG_ERR,
+			      ("Unable to set %s - path too long\n", type));
+			return false;
+		}
+
+		strncpy(helper, t, size);
+	} else if (file == NULL) {
+		return false;
+	} else if (dir == NULL) {
+			DEBUG(DEBUG_ERR,
+			      ("Unable to set %s - dir is NULL\n", type));
+		return false;
+	} else {
+		int ret;
+
+		ret = snprintf(helper, size, "%s/%s", dir, file);
+		if (ret < 0 || (size_t)ret >= size) {
+			DEBUG(DEBUG_ERR,
+			      ("Unable to set %s - path too long\n", type));
+			return false;
+		}
+	}
+
+	if (stat(helper, &st) != 0) {
+		DEBUG(DEBUG_ERR,
+		      ("Unable to set %s \"%s\" - %s\n",
+		       type, helper, strerror(errno)));
+		return false;
+	}
+	if (!(st.st_mode & S_IXUSR)) {
+		DEBUG(DEBUG_ERR,
+		      ("Unable to set %s \"%s\" - not executable\n",
+		       type, helper));
+		return false;
+	}
+
+	DEBUG(DEBUG_NOTICE,
+	      ("Set %s to \"%s\"\n", type, helper));
+	return true;
+}
+
+/*
+  parse a IP:port pair
+*/
+int ctdb_parse_address(TALLOC_CTX *mem_ctx, const char *str,
+		       ctdb_sock_addr *address)
+{
+	struct servent *se;
+	int port;
+	int ret;
+
+	setservent(0);
+	se = getservbyname("ctdb", "tcp");
+	endservent();
+
+	if (se == NULL) {
+		port = CTDB_PORT;
+	} else {
+		port = ntohs(se->s_port);
+	}
+
+	ret = ctdb_sock_addr_from_string(str, address, false);
+	if (ret != 0) {
+		return -1;
+	}
+	ctdb_sock_addr_set_port(address, port);
+
+	return 0;
+}
+
+
+/*
+  check if two addresses are the same
+*/
+bool ctdb_same_address(ctdb_sock_addr *a1, ctdb_sock_addr *a2)
+{
+	return ctdb_same_ip(a1, a2) &&
+		ctdb_addr_to_port(a1) == ctdb_addr_to_port(a2);
+}
+
+
+/*
+  hash function for mapping data to a VNN - taken from tdb
+*/
+uint32_t ctdb_hash(const TDB_DATA *key)
+{
+	return tdb_jenkins_hash(discard_const(key));
+}
+
+
+static uint32_t ctdb_marshall_record_size(TDB_DATA key,
+					  struct ctdb_ltdb_header *header,
+					  TDB_DATA data)
+{
+	return offsetof(struct ctdb_rec_data_old, data) + key.dsize +
+	       data.dsize + (header ? sizeof(*header) : 0);
+}
+
+static void ctdb_marshall_record_copy(struct ctdb_rec_data_old *rec,
+				      uint32_t reqid,
+				      TDB_DATA key,
+				      struct ctdb_ltdb_header *header,
+				      TDB_DATA data,
+				      uint32_t length)
+{
+	uint32_t offset;
+
+	rec->length = length;
+	rec->reqid = reqid;
+	rec->keylen = key.dsize;
+	memcpy(&rec->data[0], key.dptr, key.dsize);
+	offset = key.dsize;
+
+	if (header) {
+		rec->datalen = data.dsize + sizeof(*header);
+		memcpy(&rec->data[offset], header, sizeof(*header));
+		offset += sizeof(*header);
+	} else {
+		rec->datalen = data.dsize;
+	}
+	memcpy(&rec->data[offset], data.dptr, data.dsize);
+}
+
+/*
+  form a ctdb_rec_data record from a key/data pair
+  
+  note that header may be NULL. If not NULL then it is included in the data portion
+  of the record
+ */
+struct ctdb_rec_data_old *ctdb_marshall_record(TALLOC_CTX *mem_ctx,
+					       uint32_t reqid,
+					       TDB_DATA key,
+					       struct ctdb_ltdb_header *header,
+					       TDB_DATA data)
+{
+	size_t length;
+	struct ctdb_rec_data_old *d;
+
+	length = ctdb_marshall_record_size(key, header, data);
+
+	d = (struct ctdb_rec_data_old *)talloc_size(mem_ctx, length);
+	if (d == NULL) {
+		return NULL;
+	}
+
+	ctdb_marshall_record_copy(d, reqid, key, header, data, length);
+	return d;
+}
+
+
+/* helper function for marshalling multiple records */
+struct ctdb_marshall_buffer *ctdb_marshall_add(TALLOC_CTX *mem_ctx,
+					       struct ctdb_marshall_buffer *m,
+					       uint32_t db_id,
+					       uint32_t reqid,
+					       TDB_DATA key,
+					       struct ctdb_ltdb_header *header,
+					       TDB_DATA data)
+{
+	struct ctdb_rec_data_old *r;
+	struct ctdb_marshall_buffer *m2;
+	uint32_t length, offset;
+
+	length = ctdb_marshall_record_size(key, header, data);
+
+	if (m == NULL) {
+		offset = offsetof(struct ctdb_marshall_buffer, data);
+		m2 = talloc_zero_size(mem_ctx, offset + length);
+	} else {
+		offset = talloc_get_size(m);
+		m2 = talloc_realloc_size(mem_ctx, m, offset + length);
+	}
+	if (m2 == NULL) {
+		TALLOC_FREE(m);
+		return NULL;
+	}
+
+	if (m == NULL) {
+		m2->db_id = db_id;
+	}
+
+	r = (struct ctdb_rec_data_old *)((uint8_t *)m2 + offset);
+	ctdb_marshall_record_copy(r, reqid, key, header, data, length);
+	m2->count++;
+
+	return m2;
+}
+
+/* we've finished marshalling, return a data blob with the marshalled records */
+TDB_DATA ctdb_marshall_finish(struct ctdb_marshall_buffer *m)
+{
+	TDB_DATA data;
+	data.dptr = (uint8_t *)m;
+	data.dsize = talloc_get_size(m);
+	return data;
+}
+
+/* 
+   loop over a marshalling buffer 
+   
+     - pass r==NULL to start
+     - loop the number of times indicated by m->count
+*/
+struct ctdb_rec_data_old *ctdb_marshall_loop_next(
+				struct ctdb_marshall_buffer *m,
+				struct ctdb_rec_data_old *r,
+				uint32_t *reqid,
+				struct ctdb_ltdb_header *header,
+				TDB_DATA *key, TDB_DATA *data)
+{
+	if (r == NULL) {
+		r = (struct ctdb_rec_data_old *)&m->data[0];
+	} else {
+		r = (struct ctdb_rec_data_old *)(r->length + (uint8_t *)r);
+	}
+
+	if (reqid != NULL) {
+		*reqid = r->reqid;
+	}
+	
+	if (key != NULL) {
+		key->dptr   = &r->data[0];
+		key->dsize  = r->keylen;
+	}
+	if (data != NULL) {
+		data->dptr  = &r->data[r->keylen];
+		data->dsize = r->datalen;
+		if (header != NULL) {
+			data->dptr += sizeof(*header);
+			data->dsize -= sizeof(*header);
+		}
+	}
+
+	if (header != NULL) {
+		if (r->datalen < sizeof(*header)) {
+			return NULL;
+		}
+		memcpy(header, &r->data[r->keylen], sizeof(*header));
+	}
+
+	return r;
+}
+
+/*
+   This is used to canonicalize a ctdb_sock_addr structure.
+*/
+void ctdb_canonicalize_ip(const ctdb_sock_addr *ip, ctdb_sock_addr *cip)
+{
+	ZERO_STRUCTP(cip);
+
+	if (ip->sa.sa_family == AF_INET6) {
+		const char prefix[12] = { 0,0,0,0,0,0,0,0,0,0,0xff,0xff };
+		if (memcmp(&ip->ip6.sin6_addr, prefix, sizeof(prefix)) == 0) {
+			/* Copy IPv4-mapped IPv6 addresses as IPv4 */
+			cip->ip.sin_family = AF_INET;
+#ifdef HAVE_SOCK_SIN_LEN
+			cip->ip.sin_len = sizeof(ctdb_sock_addr);
+#endif
+			cip->ip.sin_port   = ip->ip6.sin6_port;
+			memcpy(&cip->ip.sin_addr,
+			       &ip->ip6.sin6_addr.s6_addr[12],
+			       sizeof(cip->ip.sin_addr));
+		} else {
+			cip->ip6.sin6_family = AF_INET6;
+#ifdef HAVE_SOCK_SIN6_LEN
+			cip->ip6.sin6_len = sizeof(ctdb_sock_addr);
+#endif
+			cip->ip6.sin6_port   = ip->ip6.sin6_port;
+			memcpy(&cip->ip6.sin6_addr,
+			       &ip->ip6.sin6_addr,
+			       sizeof(cip->ip6.sin6_addr));
+		}
+
+		return;
+	}
+
+	if (ip->sa.sa_family == AF_INET) {
+		cip->ip.sin_family = AF_INET;
+#ifdef HAVE_SOCK_SIN_LEN
+		cip->ip.sin_len = sizeof(ctdb_sock_addr);
+#endif
+		cip->ip.sin_port = ip->ip.sin_port;
+		memcpy(&cip->ip.sin_addr,
+		       &ip->ip.sin_addr,
+		       sizeof(ip->ip.sin_addr));
+
+		return;
+	}
+}
+
+void ctdb_canonicalize_ip_inplace(ctdb_sock_addr *ip)
+{
+	ctdb_sock_addr tmp;
+	ctdb_canonicalize_ip(ip, &tmp);
+	memcpy(ip, &tmp, sizeof(tmp));
+}
+
+bool ctdb_same_ip(const ctdb_sock_addr *tip1, const ctdb_sock_addr *tip2)
+{
+	ctdb_sock_addr ip1, ip2;
+
+	ctdb_canonicalize_ip(tip1, &ip1);
+	ctdb_canonicalize_ip(tip2, &ip2);
+	
+	if (ip1.sa.sa_family != ip2.sa.sa_family) {
+		return false;
+	}
+
+	switch (ip1.sa.sa_family) {
+	case AF_INET:
+		return ip1.ip.sin_addr.s_addr == ip2.ip.sin_addr.s_addr;
+	case AF_INET6:
+		return !memcmp(&ip1.ip6.sin6_addr.s6_addr[0],
+				&ip2.ip6.sin6_addr.s6_addr[0],
+				16);
+	default:
+		DEBUG(DEBUG_ERR, (__location__ " CRITICAL Can not compare sockaddr structures of type %u\n", ip1.sa.sa_family));
+		return false;
+	}
+
+	return true;
+}
+
+/*
+  compare two ctdb_sock_addr structures
+ */
+bool ctdb_same_sockaddr(const ctdb_sock_addr *ip1, const ctdb_sock_addr *ip2)
+{
+	return ctdb_same_ip(ip1, ip2) && ip1->ip.sin_port == ip2->ip.sin_port;
+}
+
+char *ctdb_addr_to_str(ctdb_sock_addr *addr)
+{
+	static char cip[128] = "";
+
+	switch (addr->sa.sa_family) {
+	case AF_INET:
+		inet_ntop(addr->ip.sin_family, &addr->ip.sin_addr, cip, sizeof(cip));
+		break;
+	case AF_INET6:
+		inet_ntop(addr->ip6.sin6_family, &addr->ip6.sin6_addr, cip, sizeof(cip));
+		break;
+	default:
+		DEBUG(DEBUG_ERR, (__location__ " ERROR, unknown family %u\n", addr->sa.sa_family));
+	}
+
+	return cip;
+}
+
+unsigned ctdb_addr_to_port(ctdb_sock_addr *addr)
+{
+	switch (addr->sa.sa_family) {
+	case AF_INET:
+		return ntohs(addr->ip.sin_port);
+		break;
+	case AF_INET6:
+		return ntohs(addr->ip6.sin6_port);
+		break;
+	default:
+		DEBUG(DEBUG_ERR, (__location__ " ERROR, unknown family %u\n", addr->sa.sa_family));
+	}
+
+	return 0;
+}
+
+/* Add a node to a node map with given address and flags */
+static bool node_map_add(TALLOC_CTX *mem_ctx,
+			 const char *nstr, uint32_t flags,
+			 struct ctdb_node_map_old **node_map)
+{
+	ctdb_sock_addr addr;
+	uint32_t num;
+	size_t s;
+	struct ctdb_node_and_flags *n;
+
+	/* Might as well do this before trying to allocate memory */
+	if (ctdb_parse_address(mem_ctx, nstr, &addr) == -1) {
+		return false;
+	}
+
+	num = (*node_map)->num + 1;
+	s = offsetof(struct ctdb_node_map_old, nodes) +
+		num * sizeof(struct ctdb_node_and_flags);
+	*node_map = talloc_realloc_size(mem_ctx, *node_map, s);
+	if (*node_map == NULL) {
+		DEBUG(DEBUG_ERR, (__location__ " Out of memory\n"));
+		return false;
+	}
+
+	n = &(*node_map)->nodes[(*node_map)->num];
+	n->addr = addr;
+	n->pnn = (*node_map)->num;
+	n->flags = flags;
+
+	(*node_map)->num++;
+
+	return true;
+}
+
+/* Read a nodes file into a node map */
+struct ctdb_node_map_old *ctdb_read_nodes_file(TALLOC_CTX *mem_ctx,
+					   const char *nlist)
+{
+	char **lines;
+	int nlines;
+	int i;
+	struct ctdb_node_map_old *ret;
+
+	/* Allocate node map header */
+	ret = talloc_zero_size(mem_ctx, offsetof(struct ctdb_node_map_old, nodes));
+	if (ret == NULL) {
+		DEBUG(DEBUG_ERR, (__location__ " Out of memory\n"));
+		return false;
+	}
+
+	lines = file_lines_load(nlist, &nlines, 0, mem_ctx);
+	if (lines == NULL) {
+		DEBUG(DEBUG_ERR, ("Failed to read nodes file \"%s\"\n", nlist));
+		return false;
+	}
+	while (nlines > 0 && strcmp(lines[nlines-1], "") == 0) {
+		nlines--;
+	}
+
+	for (i=0; i < nlines; i++) {
+		char *node;
+		uint32_t flags;
+		size_t len;
+
+		node = lines[i];
+		/* strip leading spaces */
+		while((*node == ' ') || (*node == '\t')) {
+			node++;
+		}
+
+		len = strlen(node);
+
+		while ((len > 1) &&
+		       ((node[len-1] == ' ') || (node[len-1] == '\t')))
+		{
+			node[len-1] = '\0';
+			len--;
+		}
+
+		if (len == 0) {
+			continue;
+		}
+		if (*node == '#') {
+			/* A "deleted" node is a node that is
+			   commented out in the nodes file.  This is
+			   used instead of removing a line, which
+			   would cause subsequent nodes to change
+			   their PNN. */
+			flags = NODE_FLAGS_DELETED;
+			node = discard_const("0.0.0.0");
+		} else {
+			flags = 0;
+		}
+		if (!node_map_add(mem_ctx, node, flags, &ret)) {
+			talloc_free(lines);
+			TALLOC_FREE(ret);
+			return NULL;
+		}
+	}
+
+	talloc_free(lines);
+	return ret;
+}
+
+struct ctdb_node_map_old *
+ctdb_node_list_to_map(struct ctdb_node **nodes, uint32_t num_nodes,
+		      TALLOC_CTX *mem_ctx)
+{
+	uint32_t i;
+	size_t size;
+	struct ctdb_node_map_old *node_map;
+
+	size = offsetof(struct ctdb_node_map_old, nodes) +
+		num_nodes * sizeof(struct ctdb_node_and_flags);
+	node_map  = (struct ctdb_node_map_old *)talloc_zero_size(mem_ctx, size);
+	if (node_map == NULL) {
+		DEBUG(DEBUG_ERR,
+		      (__location__ " Failed to allocate nodemap array\n"));
+		return NULL;
+	}
+
+	node_map->num = num_nodes;
+	for (i=0; i<num_nodes; i++) {
+		node_map->nodes[i].addr  = nodes[i]->address;
+		node_map->nodes[i].pnn   = nodes[i]->pnn;
+		node_map->nodes[i].flags = nodes[i]->flags;
+	}
+
+	return node_map;
+}
+
+const char *ctdb_eventscript_call_names[] = {
+	"init",
+	"setup",
+	"startup",
+	"startrecovery",
+	"recovered",
+	"takeip",
+	"releaseip",
+	"stopped",
+	"monitor",
+	"status",
+	"shutdown",
+	"reload",
+	"updateip",
+	"ipreallocated"
+};
+
+/* Runstate handling */
+static struct {
+	enum ctdb_runstate runstate;
+	const char * label;
+} runstate_map[] = {
+	{ CTDB_RUNSTATE_UNKNOWN, "UNKNOWN" },
+	{ CTDB_RUNSTATE_INIT, "INIT" },
+	{ CTDB_RUNSTATE_SETUP, "SETUP" },
+	{ CTDB_RUNSTATE_FIRST_RECOVERY, "FIRST_RECOVERY" },
+	{ CTDB_RUNSTATE_STARTUP, "STARTUP" },
+	{ CTDB_RUNSTATE_RUNNING, "RUNNING" },
+	{ CTDB_RUNSTATE_SHUTDOWN, "SHUTDOWN" },
+	{ -1, NULL },
+};
+
+const char *runstate_to_string(enum ctdb_runstate runstate)
+{
+	int i;
+	for (i=0; runstate_map[i].label != NULL ; i++) {
+		if (runstate_map[i].runstate == runstate) {
+			return runstate_map[i].label;
+		}
+	}
+
+	return runstate_map[0].label;
+}
+
+enum ctdb_runstate runstate_from_string(const char *label)
+{
+	int i;
+	for (i=0; runstate_map[i].label != NULL; i++) {
+		if (strcasecmp(runstate_map[i].label, label) == 0) {
+			return runstate_map[i].runstate;
+		}
+	}
+
+	return CTDB_RUNSTATE_UNKNOWN;
+}
+
+void ctdb_set_runstate(struct ctdb_context *ctdb, enum ctdb_runstate runstate)
+{
+	DEBUG(DEBUG_NOTICE,("Set runstate to %s (%d)\n",
+			    runstate_to_string(runstate), runstate));
+
+	if (runstate <= ctdb->runstate) {
+		ctdb_fatal(ctdb, "runstate must always increase");
+	}
+
+	ctdb->runstate = runstate;
+}
+
+/* Convert arbitrary data to 4-byte boundary padded uint32 array */
+uint32_t *ctdb_key_to_idkey(TALLOC_CTX *mem_ctx, TDB_DATA key)
+{
+	uint32_t idkey_size, *k;
+
+	idkey_size = 1 + (key.dsize + sizeof(uint32_t)-1) / sizeof(uint32_t);
+
+	k = talloc_zero_array(mem_ctx, uint32_t, idkey_size);
+	if (k == NULL) {
+		return NULL;
+	}
+
+	k[0] = idkey_size;
+	memcpy(&k[1], key.dptr, key.dsize);
+
+	return k;
+}