mirror of https://gerrit.osmocom.org/libosmocore
fsm: Add VTY introspection of osmo_fsm and their instances
Change-Id: I89212e4f149f019099115a85bab353c04170df90
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8808bb49a2
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@ -20,5 +20,13 @@ void vty_out_statistics_full(struct vty *vty, const char *prefix);
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void vty_out_statistics_partial(struct vty *vty, const char *prefix,
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int max_level);
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struct osmo_fsm;
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struct osmo_fsm_inst;
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void vty_out_fsm(struct vty *vty, struct osmo_fsm *fsm);
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void vty_out_fsm_inst(struct vty *vty, struct osmo_fsm_inst *fsmi);
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void osmo_fsm_vty_add_cmds(void);
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int osmo_vty_write_config_file(const char *filename);
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int osmo_vty_save_config_file(void);
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@ -87,7 +87,7 @@
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*
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*/
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static LLIST_HEAD(g_fsms);
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LLIST_HEAD(osmo_g_fsms);
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static bool fsm_log_addr = true;
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/*! \brief specify if FSM instance addresses should be logged or not
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@ -106,7 +106,7 @@ void osmo_fsm_log_addr(bool log_addr)
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struct osmo_fsm *osmo_fsm_find_by_name(const char *name)
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{
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struct osmo_fsm *fsm;
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llist_for_each_entry(fsm, &g_fsms, list) {
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llist_for_each_entry(fsm, &osmo_g_fsms, list) {
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if (!strcmp(name, fsm->name))
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return fsm;
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}
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@ -125,7 +125,7 @@ int osmo_fsm_register(struct osmo_fsm *fsm)
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{
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if (osmo_fsm_find_by_name(fsm->name))
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return -EEXIST;
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llist_add_tail(&fsm->list, &g_fsms);
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llist_add_tail(&fsm->list, &osmo_g_fsms);
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INIT_LLIST_HEAD(&fsm->instances);
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return 0;
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@ -10,7 +10,7 @@ if ENABLE_VTY
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lib_LTLIBRARIES = libosmovty.la
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libosmovty_la_SOURCES = buffer.c command.c vty.c vector.c utils.c \
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telnet_interface.c logging_vty.c stats_vty.c
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telnet_interface.c logging_vty.c stats_vty.c fsm_vty.c
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libosmovty_la_LDFLAGS = -version-info $(LIBVERSION) -no-undefined $(TALLOC_LIBS)
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libosmovty_la_LIBADD = $(top_builddir)/src/libosmocore.la
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endif
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@ -0,0 +1,177 @@
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/* Osmocom FSM introspection via VTY */
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/* (C) 2016 by Harald Welte <laforge@gnumonks.org>
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* All Rights Reserved
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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*/
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#include <stdlib.h>
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#include <string.h>
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#include "../../config.h"
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#include <osmocom/vty/command.h>
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#include <osmocom/vty/buffer.h>
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#include <osmocom/vty/vty.h>
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#include <osmocom/vty/telnet_interface.h>
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#include <osmocom/vty/misc.h>
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#include <osmocom/core/fsm.h>
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#include <osmocom/core/logging.h>
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#include <osmocom/core/linuxlist.h>
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/* we don't want to add this to a public header file; this is simply
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* exported by libosmocore and used by libmsomvty but not for public
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* consumption. */
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extern struct llist_head osmo_g_fsms;
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/*! \brief Print information about a FSM [class] to the given VTY
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* \param vty The VTY to which to print
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* \param[in] fsm The FSM class to print
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*/
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void vty_out_fsm(struct vty *vty, struct osmo_fsm *fsm)
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{
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unsigned int i;
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const struct value_string *evt_name;
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vty_out(vty, "FSM Name: '%s', Log Subsys: '%s'%s", fsm->name,
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log_category_name(fsm->log_subsys), VTY_NEWLINE);
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/* list the events */
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for (evt_name = fsm->event_names; evt_name->str != NULL; evt_name++) {
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vty_out(vty, " Event %02u (0x%08x): '%s'%s", evt_name->value,
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(1 << evt_name->value), evt_name->str, VTY_NEWLINE);
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}
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/* list the states */
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vty_out(vty, " Number of States: %u%s", fsm->num_states, VTY_NEWLINE);
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for (i = 0; i < fsm->num_states; i++) {
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const struct osmo_fsm_state *state = &fsm->states[i];
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vty_out(vty, " State %-20s InEvtMask: 0x%08x, OutStateMask: 0x%08x%s",
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state->name, state->in_event_mask, state->out_state_mask,
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VTY_NEWLINE);
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}
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}
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/*! \brief Print a FSM instance to the given VTY
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* \param vty The VTY to which to print
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* \param[in] fsmi The FSM instance to print
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*/
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void vty_out_fsm_inst(struct vty *vty, struct osmo_fsm_inst *fsmi)
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{
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struct osmo_fsm_inst *child;
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vty_out(vty, "FSM Instance Name: '%s', ID: '%s'%s",
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fsmi->name, fsmi->id, VTY_NEWLINE);
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vty_out(vty, " Log-Level: '%s', State: '%s'%s",
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log_level_str(fsmi->log_level),
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osmo_fsm_state_name(fsmi->fsm, fsmi->state),
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VTY_NEWLINE);
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if (fsmi->T)
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vty_out(vty, " Timer: %u%s", fsmi->T, VTY_NEWLINE);
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if (fsmi->proc.parent) {
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vty_out(vty, " Parent: '%s', Term-Event: '%s'%s",
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fsmi->proc.parent->name,
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osmo_fsm_event_name(fsmi->proc.parent->fsm,
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fsmi->proc.parent_term_event),
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VTY_NEWLINE);
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}
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llist_for_each_entry(child, &fsmi->proc.children, list) {
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vty_out(vty, " Child: '%s'%s", child->name, VTY_NEWLINE);
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}
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}
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#define SH_FSM_STR SHOW_STR "Show information about finite state machines\n"
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#define SH_FSMI_STR SHOW_STR "Show information about finite state machine instances\n"
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DEFUN(show_fsms, show_fsms_cmd,
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"show fsm all",
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SH_FSM_STR
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"Display a list of all registered finite state machines\n")
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{
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struct osmo_fsm *fsm;
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llist_for_each_entry(fsm, &osmo_g_fsms, list)
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vty_out_fsm(vty, fsm);
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return CMD_SUCCESS;
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}
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DEFUN(show_fsm, show_fsm_cmd,
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"show fsm NAME",
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SH_FSM_STR
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"Display information about a single named finite state machine\n")
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{
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struct osmo_fsm *fsm;
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fsm = osmo_fsm_find_by_name(argv[0]);
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if (!fsm) {
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vty_out(vty, "Error: FSM with name '%s' doesn't exist!%s",
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argv[0], VTY_NEWLINE);
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return CMD_WARNING;
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}
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vty_out_fsm(vty, fsm);
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return CMD_SUCCESS;
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}
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DEFUN(show_fsm_insts, show_fsm_insts_cmd,
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"show fsm-instances all",
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SH_FSMI_STR
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"Display a list of all FSM instances of all finite state machine")
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{
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struct osmo_fsm *fsm;
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llist_for_each_entry(fsm, &osmo_g_fsms, list) {
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struct osmo_fsm_inst *fsmi;
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llist_for_each_entry(fsmi, &fsm->instances, list)
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vty_out_fsm_inst(vty, fsmi);
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}
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return CMD_SUCCESS;
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}
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DEFUN(show_fsm_inst, show_fsm_inst_cmd,
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"show fsm-instances NAME",
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SH_FSMI_STR
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"Display a list of all FSM instances of the named finite state machine")
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{
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struct osmo_fsm *fsm;
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struct osmo_fsm_inst *fsmi;
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fsm = osmo_fsm_find_by_name(argv[0]);
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if (!fsm) {
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vty_out(vty, "Error: FSM with name '%s' doesn't exist!%s",
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argv[0], VTY_NEWLINE);
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return CMD_WARNING;
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}
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llist_for_each_entry(fsmi, &fsm->instances, list)
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vty_out_fsm_inst(vty, fsmi);
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return CMD_SUCCESS;
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}
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/*! \brief Install VTY commands for FSM introspection
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* This installs a couple of VTY commands for introspection of FSM
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* classes as well as FSM instances. Call this once from your
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* application if you want to support those commands. */
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void osmo_fsm_vty_add_cmds(void)
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{
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install_element_ve(&show_fsm_cmd);
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install_element_ve(&show_fsms_cmd);
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install_element_ve(&show_fsm_inst_cmd);
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install_element_ve(&show_fsm_insts_cmd);
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}
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