experiments/clixon
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Fixed bug that deletes running on startup if backup started with -m running

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This commit is contained in:
Olof Hagsand 2017-12-10 15:29:22 +01:00
parent 662495fff0
commit dd7f790193
6 changed files with 93 additions and 33 deletions
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95
apps/backend/backend_main.c
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@ -164,7 +164,7 @@ static int
db_reset(clicon_handle h,
char *db)
{
if (xmldb_delete(h, db) != 0 && errno != ENOENT)
if (xmldb_exists(h, db) == 1 && xmldb_delete(h, db) != 0 && errno != ENOENT)
return -1;
if (xmldb_create(h, db) < 0)
return -1;
@ -502,13 +502,22 @@ startup_mode_init(clicon_handle h)
/*! Clixon running startup mode: Commit running db configuration into running
*
copy reset commit merge
running----+ |--------------------+-----+------>
\ / /
candidate +--------------------+ /
/
tmp |-------+-----+---------+
OK:
copy reset commit merge
running----+ |--------------------+--------+------>
\ / /
candidate +--------------------+ /
/
tmp |-------+-----+------------+---|
reset extra file
COMMIT ERROR:
copy reset copy
running----+ |--------------------+------> EXIT
\ /
candidate +--------------------+
* @note: if commit fails, copy candidate to running and exit
*/
static int
startup_mode_running(clicon_handle h,
@ -522,9 +531,6 @@ startup_mode_running(clicon_handle h,
/* Load plugins and call plugin_init() */
if (plugin_initiate(h) != 0)
goto done;
/* Clear running db */
if (db_reset(h, "running") < 0)
goto done;
/* Clear tmp db */
if (db_reset(h, "tmp") < 0)
goto done;
@ -534,25 +540,53 @@ startup_mode_running(clicon_handle h,
/* Get application extra xml from file */
if (load_extraxml(h, extraxml_file, "tmp") < 0)
goto done;
/* Commit original running */
if (candidate_commit(h, "candidate") < 0)
/* Clear running db */
if (db_reset(h, "running") < 0)
goto done;
/* Commit original running. Assume -1 is validate fail */
if (candidate_commit(h, "candidate") < 0){
/* (1) We cannot differentiate between fatal errors and validation
* failures
* (2) If fatal error, we should exit
* (3) If validation fails we cannot continue. How could we?
* (4) Need to restore the running db since we destroyed it above
*/
clicon_log(LOG_NOTICE, "%s: Commit of saved running failed, exiting.", __FUNCTION__);
/* Reinstate original */
if (xmldb_copy(h, "candidate", "running") < 0)
goto done;
goto done;
}
/* Merge user reset state and extra xml file (no commit) */
if (db_merge(h, "tmp", "running") < 0)
goto done;
retval = 0;
done:
if (xmldb_delete(h, "tmp") < 0)
goto done;
return retval;
}
/*! Clixon startup startup mode: Commit startup configuration into running state
reset commit merge
running |--------------------+-----+------>
/ /
startup --------------------+ /
/
tmp |-------+-----+---------+
backup +--------------------|
copy / reset commit merge
running |-+----|--------------------+-----+------>
/ /
startup -------------------------+--> /
/
tmp -----|-------+-----+---------+--|
reset extra file
COMMIT ERROR:
backup +------------------------+--|
copy / reset copy \
running |-+----|--------------------+---+------->EXIT
error /
startup -------------------------+--|
* @note: if commit fails, copy backup to commit and exit
*/
static int
startup_mode_startup(clicon_handle h,
@ -560,6 +594,9 @@ startup_mode_startup(clicon_handle h,
{
int retval = -1;
/* Stash original running to backup */
if (xmldb_copy(h, "running", "backup") < 0)
goto done;
/* If startup does not exist, clear it */
if (xmldb_exists(h, "startup") != 1) /* diff */
if (xmldb_create(h, "startup") < 0) /* diff */
@ -567,9 +604,6 @@ startup_mode_startup(clicon_handle h,
/* Load plugins and call plugin_init() */
if (plugin_initiate(h) != 0)
goto done;
/* Clear running db */
if (db_reset(h, "running") < 0)
goto done;
/* Clear tmp db */
if (db_reset(h, "tmp") < 0)
goto done;
@ -579,14 +613,29 @@ startup_mode_startup(clicon_handle h,
/* Get application extra xml from file */
if (load_extraxml(h, extraxml_file, "tmp") < 0)
goto done;
/* Commit startup */
if (candidate_commit(h, "startup") < 0) /* diff */
/* Clear running db */
if (db_reset(h, "running") < 0)
goto done;
/* Commit startup */
if (candidate_commit(h, "startup") < 0){ /* diff */
/* We cannot differentiate between fatal errors and validation
* failures
* In both cases we copy back the original running and quit
*/
clicon_log(LOG_NOTICE, "%s: Commit of startup failed, exiting.", __FUNCTION__);
if (xmldb_copy(h, "backup", "running") < 0)
goto done;
goto done;
}
/* Merge user reset state and extra xml file (no commit) */
if (db_merge(h, "tmp", "running") < 0)
goto done;
retval = 0;
done:
if (xmldb_delete(h, "backup") < 0)
goto done;
if (xmldb_delete(h, "tmp") < 0)
goto done;
return retval;
}