Backend daemon startup modes
This commit is contained in:
Olof hagsand
parent
23e40384f7
commit
496d676ad3
26 changed files with 769 additions and 280 deletions
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@ -73,7 +73,11 @@
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#include "backend_handle.h"
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/* Command line options to be passed to getopt(3) */
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#define BACKEND_OPTS "hD:f:d:b:Fzu:P:1IRCc:rg:py:x:"
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#ifdef BACKEND_STARTUP_BACKWARD_COMPAT
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#define BACKEND_OPTS "hD:f:d:b:Fzu:P:1s:c:IRCrg:py:x:" /* substitute s: for IRCc:r */
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#else
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#define BACKEND_OPTS "hD:f:d:b:Fzu:P:1s:c:g:py:x:" /* substitute s: for IRCc:r */
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#endif
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/*! Terminate. Cannot use h after this */
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static int
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@ -114,8 +118,7 @@ backend_sig_term(int arg)
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clicon_exit_set(); /* checked in event_loop() */
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}
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/*
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* usage
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/*! usage
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*/
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static void
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usage(char *argv0, clicon_handle h)
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@ -137,11 +140,14 @@ usage(char *argv0, clicon_handle h)
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" -1\t\tRun once and then quit (dont wait for events)\n"
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" -u <path>\tConfig UNIX domain path / ip address (default: %s)\n"
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" -P <file>\tPid filename (default: %s)\n"
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" -s <mode>\tSpecify backend startup mode: none|startup|running|init (replaces -IRCc:r:\n"
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" -c <file>\tLoad extra xml configuration, but don't commit.\n"
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#ifdef BACKEND_STARTUP_BACKWARD_COMPAT
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" -I\t\tInitialize running state database\n"
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" -R\t\tCall plugin_reset() in plugins to reset system state in running db (use with -I)\n"
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" -C\t\tCall plugin_reset() in plugins to reset system state in candidate db (use with -I)\n"
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" -c <file>\tLoad specified application config.\n"
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" -r\t\tReload running database\n"
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#endif /* BACKEND_STARTUP_BACKWARD_COMPAT */
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" -p \t\tPrint database yang specification\n"
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" -g <group>\tClient membership required to this group (default: %s)\n"
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" -y <file>\tOverride yang spec file (dont include .yang suffix)\n"
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@ -166,69 +172,26 @@ db_reset(clicon_handle h,
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return 0;
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}
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/*! Initialize running-config from file application configuration
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*
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* @param[in] h clicon handle
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* @param[in] app_config_file clicon application configuration file
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* @param[in] running_db Name of running db
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* @retval 0 OK
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* @retval -1 Error. clicon_err set
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/*! Merge db1 into db2 without commit
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*/
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static int
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rundb_main(clicon_handle h,
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char *app_config_file)
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db_merge(clicon_handle h,
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const char *db1,
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const char *db2)
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{
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int retval = -1;
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int fd = -1;
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cxobj *xt = NULL;
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cxobj *xn;
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int retval = -1;
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cxobj *xt = NULL;
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if (xmldb_create(h, "tmp") < 0)
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/* Get data as xml from db1 */
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if (xmldb_get(h, (char*)db1, NULL, 1, &xt) < 0)
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goto done;
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if (xmldb_copy(h, "running", "tmp") < 0){
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clicon_err(OE_UNIX, errno, "file copy");
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goto done;
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}
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if ((fd = open(app_config_file, O_RDONLY)) < 0){
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clicon_err(OE_UNIX, errno, "open(%s)", app_config_file);
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goto done;
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}
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if (clicon_xml_parse_file(fd, &xt, "</clicon>") < 0)
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goto done;
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if ((xn = xml_child_i(xt, 0)) != NULL)
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if (xmldb_put(h, "tmp", OP_MERGE, xn) < 0)
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goto done;
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if (candidate_commit(h, "tmp") < 0)
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goto done;
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if (xmldb_delete(h, "tmp") < 0)
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/* Merge xml into db2. WIthout commit */
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if (xmldb_put(h, (char*)db2, OP_MERGE, xt) < 0)
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goto done;
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retval = 0;
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done:
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done:
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if (xt)
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xml_free(xt);
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if (fd != -1)
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close(fd);
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return retval;
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}
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static int
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candb_reset(clicon_handle h)
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{
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int retval = -1;
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if (xmldb_copy(h, "running", "tmp") < 0){
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clicon_err(OE_UNIX, errno, "file copy");
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goto done;
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}
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/* Request plugins to reset system state, eg initiate running from system
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* -R
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*/
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if (plugin_reset_state(h, "tmp") < 0)
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goto done;
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if (candidate_commit(h, "tmp") < 0)
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goto done;
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retval = 0;
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done:
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return retval;
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}
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@ -291,6 +254,337 @@ backend_log_cb(int level,
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return retval;
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}
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/*! Call plugin_start with -- user options */
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static int
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plugin_start_useroptions(clicon_handle h,
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char *argv0,
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int argc,
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char **argv)
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{
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char *tmp;
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tmp = *(argv-1);
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*(argv-1) = argv0;
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if (plugin_start_argv(h, argc+1, argv-1) < 0)
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return -1;
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*(argv-1) = tmp;
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return 0;
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}
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#ifdef BACKEND_STARTUP_BACKWARD_COMPAT
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/*! Initialize running-config from file application configuration
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*
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* @param[in] h clicon handle
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* @param[in] extraxml_file clicon application configuration file
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* @param[in] running_db Name of running db
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* @retval 0 OK
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* @retval -1 Error. clicon_err set
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*/
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static int
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rundb_main(clicon_handle h,
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char *extraxml_file)
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{
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int retval = -1;
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int fd = -1;
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cxobj *xt = NULL;
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cxobj *xn;
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if (xmldb_create(h, "tmp") < 0)
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goto done;
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if (xmldb_copy(h, "running", "tmp") < 0)
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goto done;
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if ((fd = open(extraxml_file, O_RDONLY)) < 0){
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clicon_err(OE_UNIX, errno, "open(%s)", extraxml_file);
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goto done;
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}
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if (clicon_xml_parse_file(fd, &xt, "</clicon>") < 0)
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goto done;
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if ((xn = xml_child_i(xt, 0)) != NULL)
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if (xmldb_put(h, "tmp", OP_MERGE, xn) < 0)
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goto done;
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if (candidate_commit(h, "tmp") < 0)
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goto done;
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if (xmldb_delete(h, "tmp") < 0)
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goto done;
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retval = 0;
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done:
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if (xt)
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xml_free(xt);
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if (fd != -1)
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close(fd);
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return retval;
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}
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static int
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candb_reset(clicon_handle h)
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{
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int retval = -1;
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if (xmldb_copy(h, "running", "tmp") < 0)
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goto done;
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/* Request plugins to reset system state, eg initiate running from system
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* -R
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*/
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if (plugin_reset_state(h, "tmp") < 0)
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goto done;
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if (candidate_commit(h, "tmp") < 0)
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goto done;
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retval = 0;
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done:
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return retval;
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}
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/*! Legacy (old-style) startup mode where flags -IRCcr was used
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*/
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static int
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fragmented_startup_mode(clicon_handle h,
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char *argv0,
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int argc,
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char *argv[],
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int reload_running,
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int init_rundb,
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int reset_state_candidate,
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int reset_state_running,
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char *extraxml_file)
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{
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int retval = -1;
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/* First check for startup config */
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if (clicon_option_int(h, "CLICON_USE_STARTUP_CONFIG") > 0){
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if (xmldb_exists(h, "startup") == 1){
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/* copy startup config -> running */
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if (xmldb_copy(h, "startup", "running") < 0)
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goto done;
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}
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else
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if (db_reset(h, "running") < 0)
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goto done;
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if (xmldb_create(h, "candidate") < 0)
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goto done;
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if (xmldb_copy(h, "running", "candidate") < 0)
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goto done;
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}
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/* If running exists and reload_running set, make a copy to candidate */
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if (reload_running){
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if (xmldb_exists(h, "running") != 1){
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clicon_log(LOG_NOTICE, "%s: -r (reload running) option given but no running_db found, proceeding without", __PROGRAM__);
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reload_running = 0; /* void it, so we dont commit candidate below */
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}
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else
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if (xmldb_copy(h, "running", "candidate") < 0)
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goto done;
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}
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/* Init running db
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* -I or if it isnt there
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*/
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if (init_rundb || xmldb_exists(h, "running") != 1){
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if (db_reset(h, "running") < 0)
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goto done;
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}
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/* If candidate does not exist, create it from running */
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if (xmldb_exists(h, "candidate") != 1){
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if (xmldb_create(h, "candidate") < 0)
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goto done;
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if (xmldb_copy(h, "running", "candidate") < 0)
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goto done;
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}
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/* Load plugins and call plugin_init() */
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if (plugin_initiate(h) != 0)
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goto done;
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if (reset_state_candidate){
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if (candb_reset(h) < 0)
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goto done;
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}
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else
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if (reset_state_running){
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if (plugin_reset_state(h, "running") < 0)
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goto done;
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}
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if (plugin_start_useroptions(h, argv0, argc, argv) <0)
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goto done;
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if (reload_running){
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/* This could be a failed validation, and we should not fail for that */
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(void)candidate_commit(h, "candidate");
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}
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/* Have we specified a config file to load? eg
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* -c [<file>]
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*/
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if (extraxml_file)
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if (rundb_main(h, extraxml_file) < 0)
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goto done;
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/* Initiate the shared candidate. */
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if (xmldb_copy(h, "running", "candidate") < 0)
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goto done;
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retval = 0;
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done:
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return retval;
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}
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#endif /* BACKEND_STARTUP_BACKWARD_COMPAT */
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/*! Merge xml in filename into database
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*/
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static int
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load_extraxml(clicon_handle h,
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char *filename,
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const char *db)
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{
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int retval = -1;
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cxobj *xt = NULL;
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int fd = -1;
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if (filename == NULL)
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return 0;
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if ((fd = open(filename, O_RDONLY)) < 0){
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clicon_err(OE_UNIX, errno, "open(%s)", filename);
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goto done;
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}
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if (clicon_xml_parse_file(fd, &xt, "</config>") < 0)
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goto done;
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/* Replace parent w first child */
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if (xml_rootchild(xt, 0, &xt) < 0)
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goto done;
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/* Merge user reset state */
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if (xmldb_put(h, (char*)db, OP_MERGE, xt) < 0)
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goto done;
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retval = 0;
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done:
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if (fd != -1)
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close(fd);
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if (xt)
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xml_free(xt);
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return retval;
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}
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/*! Clixon none startup modes Do not touch running state
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*/
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static int
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startup_mode_none(clicon_handle h)
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{
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int retval = -1;
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/* If it is not there, create candidate from running */
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if (xmldb_exists(h, "candidate") != 1)
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if (xmldb_copy(h, "running", "candidate") < 0)
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goto done;
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/* Load plugins and call plugin_init() */
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if (plugin_initiate(h) != 0)
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goto done;
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retval = 0;
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done:
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return retval;
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}
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/*! Clixon init startup modes Start with a completely clean running state
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*/
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static int
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startup_mode_init(clicon_handle h)
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{
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int retval = -1;
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/* Reset running, regardless */
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if (db_reset(h, "running") < 0)
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goto done;
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/* If it is not there, create candidate from running */
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if (xmldb_exists(h, "candidate") != 1)
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if (xmldb_copy(h, "running", "candidate") < 0)
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goto done;
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/* Load plugins and call plugin_init() */
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if (plugin_initiate(h) != 0)
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goto done;
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retval = 0;
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done:
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return retval;
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}
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/*! Clixon running startup mode: Commit running db configuration into running
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*
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copy reset commit merge
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running----+ |--------------------+-----+------>
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\ / /
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candidate +--------------------+ /
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/
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tmp |-------+-----+---------+
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reset extra file
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*/
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static int
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startup_mode_running(clicon_handle h,
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char *extraxml_file)
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{
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int retval = -1;
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/* Stash original running to candidate for later commit */
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if (xmldb_copy(h, "running", "candidate") < 0)
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goto done;
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/* Load plugins and call plugin_init() */
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if (plugin_initiate(h) != 0)
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goto done;
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/* Clear tmp db */
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if (db_reset(h, "tmp") < 0)
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goto done;
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/* Application may define extra xml in its reset function*/
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if (plugin_reset_state(h, "tmp") < 0)
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goto done;
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/* Get application extra xml from file */
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if (load_extraxml(h, extraxml_file, "tmp") < 0)
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goto done;
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/* Commit original running */
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if (candidate_commit(h, "candidate") < 0)
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goto done;
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/* Merge user reset state and extra xml file (no commit) */
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if (db_merge(h, "tmp", "running") < 0)
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goto done;
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retval = 0;
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done:
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return retval;
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}
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/*! Clixon startup startup mode: Commit startup configuration into running state
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reset commit merge
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running |--------------------+-----+------>
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/ /
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startup --------------------+ /
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/
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tmp |-------+-----+---------+
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reset extra file
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*/
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static int
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startup_mode_startup(clicon_handle h,
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char *extraxml_file)
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{
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int retval = -1;
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/* If startup does not exist, clear it */
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if (xmldb_exists(h, "startup") != 1) /* diff */
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if (xmldb_create(h, "startup") < 0) /* diff */
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return -1;
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/* Load plugins and call plugin_init() */
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if (plugin_initiate(h) != 0)
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goto done;
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/* Clear tmp db */
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if (db_reset(h, "tmp") < 0)
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goto done;
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/* Application may define extra xml in its reset function*/
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if (plugin_reset_state(h, "tmp") < 0)
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goto done;
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/* Get application extra xml from file */
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if (load_extraxml(h, extraxml_file, "tmp") < 0)
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goto done;
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/* Commit startup */
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if (candidate_commit(h, "startup") < 0) /* diff */
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goto done;
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/* Merge user reset state and extra xml file (no commit) */
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if (db_merge(h, "tmp", "running") < 0)
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goto done;
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retval = 0;
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done:
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return retval;
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}
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int
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main(int argc, char **argv)
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{
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@ -298,14 +592,16 @@ main(int argc, char **argv)
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int zap;
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int foreground;
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int once;
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int init_rundb;
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int reload_running;
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int reset_state_running;
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int reset_state_candidate;
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char *app_config_file = NULL;
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enum startup_mode_t startup_mode;
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#ifdef BACKEND_STARTUP_BACKWARD_COMPAT
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int init_rundb = 0;
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int reset_state_running = 0;
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int reset_state_candidate = 0;
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int reload_running = 0;
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#endif
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char *extraxml_file;
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char *config_group;
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char *argv0 = argv[0];
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char *tmp;
|
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struct stat st;
|
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clicon_handle h;
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int help = 0;
|
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|
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@ -317,7 +613,6 @@ main(int argc, char **argv)
|
|||
char *xmldb_plugin;
|
||||
|
||||
/* In the startup, logs to stderr & syslog and debug flag set later */
|
||||
|
||||
clicon_log_init(__PROGRAM__, LOG_INFO, CLICON_LOG_STDERR|CLICON_LOG_SYSLOG);
|
||||
/* Initiate CLICON handle */
|
||||
if ((h = backend_handle_init()) == NULL)
|
||||
|
|
@ -327,10 +622,7 @@ main(int argc, char **argv)
|
|||
foreground = 0;
|
||||
once = 0;
|
||||
zap = 0;
|
||||
init_rundb = 0;
|
||||
reload_running = 0;
|
||||
reset_state_running = 0;
|
||||
reset_state_candidate = 0;
|
||||
extraxml_file = NULL;
|
||||
|
||||
/*
|
||||
* Command-line options for help, debug, and config-file
|
||||
|
|
@ -402,32 +694,41 @@ main(int argc, char **argv)
|
|||
case 'z': /* Zap other process */
|
||||
zap++;
|
||||
break;
|
||||
case 'u': /* config unix domain path / ip address */
|
||||
case 'u': /* config unix domain path / ip address */
|
||||
if (!strlen(optarg))
|
||||
usage(argv[0], h);
|
||||
clicon_option_str_set(h, "CLICON_SOCK", optarg);
|
||||
break;
|
||||
case 'P': /* pidfile */
|
||||
clicon_option_str_set(h, "CLICON_BACKEND_PIDFILE", optarg);
|
||||
break;
|
||||
case 'I': /* Initiate running db */
|
||||
init_rundb++;
|
||||
break;
|
||||
case 'R': /* Reset state directly into running */
|
||||
reset_state_running++;
|
||||
break;
|
||||
case 'C': /* Reset state into candidate and then commit it */
|
||||
reset_state_candidate++;
|
||||
break;
|
||||
case 'c': /* Load application config */
|
||||
app_config_file = optarg;
|
||||
break;
|
||||
case 'r': /* Reload running */
|
||||
reload_running++;
|
||||
break;
|
||||
case 'g': /* config socket group */
|
||||
clicon_option_str_set(h, "CLICON_SOCK_GROUP", optarg);
|
||||
break;
|
||||
break;
|
||||
case 'P': /* pidfile */
|
||||
clicon_option_str_set(h, "CLICON_BACKEND_PIDFILE", optarg);
|
||||
break;
|
||||
case 's' : /* startup mode */
|
||||
clicon_option_str_set(h, "CLICON_STARTUP_MODE", optarg);
|
||||
if (clicon_startup_mode(h) < 0){
|
||||
fprintf(stderr, "Invalid startup mode: %s\n", optarg);
|
||||
usage(argv[0], h);
|
||||
}
|
||||
break;
|
||||
case 'c': /* Load application config */
|
||||
extraxml_file = optarg;
|
||||
break;
|
||||
#ifdef BACKEND_STARTUP_BACKWARD_COMPAT
|
||||
case 'I': /* Initiate running db */
|
||||
init_rundb++;
|
||||
break;
|
||||
case 'R': /* Reset state directly into running */
|
||||
reset_state_running++;
|
||||
break;
|
||||
case 'C': /* Reset state into candidate and then commit it */
|
||||
reset_state_candidate++;
|
||||
break;
|
||||
case 'r': /* Reload running */
|
||||
reload_running++;
|
||||
break;
|
||||
#endif /* BACKEND_STARTUP_BACKWARD_COMPAT */
|
||||
case 'g': /* config socket group */
|
||||
clicon_option_str_set(h, "CLICON_SOCK_GROUP", optarg);
|
||||
break;
|
||||
case 'p' : /* Print spec */
|
||||
printspec++;
|
||||
break;
|
||||
|
|
@ -522,87 +823,52 @@ main(int argc, char **argv)
|
|||
goto done;
|
||||
if (xmldb_setopt(h, "yangspec", clicon_dbspec_yang(h)) < 0)
|
||||
goto done;
|
||||
|
||||
/* First check for startup config
|
||||
XXX the options below have become out-of-hand.
|
||||
Too complex, need to simplify*/
|
||||
if (clicon_option_int(h, "CLICON_USE_STARTUP_CONFIG") > 0){
|
||||
if (xmldb_exists(h, "startup") == 1){
|
||||
/* copy startup config -> running */
|
||||
if (xmldb_copy(h, "startup", "running") < 0)
|
||||
goto done;
|
||||
}
|
||||
else
|
||||
if (db_reset(h, "running") < 0)
|
||||
goto done;
|
||||
if (xmldb_create(h, "candidate") < 0)
|
||||
/* If startup mode is not defined, eg via OPTION or -s, assume old method */
|
||||
startup_mode = clicon_startup_mode(h);
|
||||
if (startup_mode == -1){ /* Old style, fragmented mode, phase out */
|
||||
#ifdef BACKEND_STARTUP_BACKWARD_COMPAT
|
||||
if (fragmented_startup_mode(h,
|
||||
argv0, argc, argv,
|
||||
reload_running, init_rundb,
|
||||
reset_state_candidate, reset_state_running,
|
||||
extraxml_file
|
||||
) < 0)
|
||||
goto done;
|
||||
#else
|
||||
clicon_log(LOG_ERR, "Startup mode indefined. Specify option CLICON_STARTUP_MODE or specify -s option to clicon_backend.\n");
|
||||
#endif
|
||||
}
|
||||
else {
|
||||
/* Init running db if it is not there
|
||||
*/
|
||||
if (xmldb_exists(h, "running") != 1)
|
||||
if (xmldb_create(h, "running") < 0)
|
||||
return -1;
|
||||
switch (startup_mode){
|
||||
case SM_NONE:
|
||||
if (startup_mode_none(h) < 0)
|
||||
goto done;
|
||||
break;
|
||||
case SM_INIT: /* -I */
|
||||
if (startup_mode_init(h) < 0)
|
||||
goto done;
|
||||
break;
|
||||
case SM_RUNNING: /* -CIr */
|
||||
if (startup_mode_running(h, extraxml_file) < 0)
|
||||
goto done;
|
||||
break;
|
||||
case SM_STARTUP: /* startup configuration */
|
||||
if (startup_mode_startup(h, extraxml_file) < 0)
|
||||
goto done;
|
||||
break;
|
||||
}
|
||||
/* Initiate the shared candidate. */
|
||||
if (xmldb_copy(h, "running", "candidate") < 0)
|
||||
goto done;
|
||||
}
|
||||
/* If running exists and reload_running set, make a copy to candidate */
|
||||
if (reload_running){
|
||||
if (xmldb_exists(h, "running") != 1){
|
||||
clicon_log(LOG_NOTICE, "%s: -r (reload running) option given but no running_db found, proceeding without", __PROGRAM__);
|
||||
reload_running = 0; /* void it, so we dont commit candidate below */
|
||||
}
|
||||
else
|
||||
if (xmldb_copy(h, "running", "candidate") < 0)
|
||||
goto done;
|
||||
}
|
||||
/* Init running db
|
||||
* -I or if it isnt there
|
||||
*/
|
||||
if (init_rundb || xmldb_exists(h, "running") != 1){
|
||||
if (db_reset(h, "running") < 0)
|
||||
/* Call plugin_start with user -- options */
|
||||
if (plugin_start_useroptions(h, argv0, argc, argv) <0)
|
||||
goto done;
|
||||
}
|
||||
/* If candidate does not exist, create it from running */
|
||||
if (xmldb_exists(h, "candidate") != 1){
|
||||
if (xmldb_create(h, "candidate") < 0)
|
||||
goto done;
|
||||
if (xmldb_copy(h, "running", "candidate") < 0)
|
||||
goto done;
|
||||
}
|
||||
|
||||
/* Initialize plugins
|
||||
(also calls plugin_init() and plugin_start(argc,argv) in each plugin */
|
||||
if (plugin_initiate(h) != 0)
|
||||
goto done;
|
||||
|
||||
if (reset_state_candidate){
|
||||
if (candb_reset(h) < 0)
|
||||
goto done;
|
||||
}
|
||||
else
|
||||
if (reset_state_running){
|
||||
if (plugin_reset_state(h, "running") < 0)
|
||||
goto done;
|
||||
}
|
||||
/* Call plugin_start */
|
||||
tmp = *(argv-1);
|
||||
*(argv-1) = argv0;
|
||||
if (plugin_start_hooks(h, argc+1, argv-1) < 0)
|
||||
goto done;
|
||||
*(argv-1) = tmp;
|
||||
|
||||
if (reload_running){
|
||||
/* This could be a failed validation, and we should not fail for that */
|
||||
(void)candidate_commit(h, "candidate");
|
||||
}
|
||||
|
||||
/* Have we specified a config file to load? eg
|
||||
* -c [<file>]
|
||||
*/
|
||||
if (app_config_file)
|
||||
if (rundb_main(h, app_config_file) < 0)
|
||||
goto done;
|
||||
|
||||
/* Initiate the shared candidate. Maybe we should not do this?
|
||||
* Too strict access
|
||||
*/
|
||||
if (xmldb_copy(h, "running", "candidate") < 0)
|
||||
goto done;
|
||||
if (once)
|
||||
goto done;
|
||||
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue