diff --git a/include/crm/services.h b/include/crm/services.h index de9e55c3f5..6261658f48 100644 --- a/include/crm/services.h +++ b/include/crm/services.h @@ -1,425 +1,427 @@ /* * Copyright 2010-2022 the Pacemaker project contributors * * The version control history for this file may have further details. * * This source code is licensed under the GNU Lesser General Public License * version 2.1 or later (LGPLv2.1+) WITHOUT ANY WARRANTY. */ #ifndef PCMK__CRM_SERVICES__H # define PCMK__CRM_SERVICES__H # include # include # include # include # include # include # include // OCF_ROOT_DIR # include # include #ifdef __cplusplus extern "C" { #endif /*! * \file * \brief Services API * \ingroup core */ /* TODO: Autodetect these two ?*/ # ifndef SYSTEMCTL # define SYSTEMCTL "/bin/systemctl" # endif /* This is the string passed in the OCF_EXIT_REASON_PREFIX environment variable. * The stderr output that occurs after this prefix is encountered is considered * the exit reason for a completed operation. */ #define PCMK_OCF_REASON_PREFIX "ocf-exit-reason:" // Agent version to use if agent doesn't specify one #define PCMK_DEFAULT_AGENT_VERSION "0.1" enum lsb_exitcode { PCMK_LSB_OK = 0, PCMK_LSB_UNKNOWN_ERROR = 1, PCMK_LSB_INVALID_PARAM = 2, PCMK_LSB_UNIMPLEMENT_FEATURE = 3, PCMK_LSB_INSUFFICIENT_PRIV = 4, PCMK_LSB_NOT_INSTALLED = 5, PCMK_LSB_NOT_CONFIGURED = 6, PCMK_LSB_NOT_RUNNING = 7, }; // LSB uses different return codes for status actions enum lsb_status_exitcode { PCMK_LSB_STATUS_OK = 0, PCMK_LSB_STATUS_VAR_PID = 1, PCMK_LSB_STATUS_VAR_LOCK = 2, PCMK_LSB_STATUS_NOT_RUNNING = 3, PCMK_LSB_STATUS_UNKNOWN = 4, /* custom codes should be in the 150-199 range reserved for application use */ PCMK_LSB_STATUS_NOT_INSTALLED = 150, PCMK_LSB_STATUS_INSUFFICIENT_PRIV = 151, }; enum nagios_exitcode { NAGIOS_STATE_OK = 0, NAGIOS_STATE_WARNING = 1, NAGIOS_STATE_CRITICAL = 2, NAGIOS_STATE_UNKNOWN = 3, /* This is a custom Pacemaker value (not a nagios convention), used as an * intermediate value between the services library and the executor, so the * executor can map it to the corresponding OCF code. */ NAGIOS_INSUFFICIENT_PRIV = 100, #if !defined(PCMK_ALLOW_DEPRECATED) || (PCMK_ALLOW_DEPRECATED == 1) NAGIOS_STATE_DEPENDENT = 4, //! \deprecated Unused NAGIOS_NOT_INSTALLED = 101, //! \deprecated Unused #endif }; enum svc_action_flags { /* On timeout, only kill pid, do not kill entire pid group */ SVC_ACTION_LEAVE_GROUP = 0x01, SVC_ACTION_NON_BLOCKED = 0x02, }; typedef struct svc_action_private_s svc_action_private_t; /*! * \brief Object for executing external actions * * \note This object should never be instantiated directly, but instead created * using one of the constructor functions (resources_action_create() for * resource agents, services_alert_create() for alert agents, or * services_action_create_generic() for generic executables). Similarly, * do not use sizeof() on this struct. - * - * \internal Internally, services__create_resource_action() is preferable to - * resources_action_create(). + */ +/* + * NOTE: Internally, services__create_resource_action() is preferable to + * resources_action_create(). */ typedef struct svc_action_s { /*! Operation key (__) for resource actions, * XML ID for alert actions, or NULL for generic actions */ char *id; //! XML ID of resource being executed for resource actions, otherwise NULL char *rsc; //! Name of action being executed for resource actions, otherwise NULL char *action; //! Action interval for recurring resource actions, otherwise 0 guint interval_ms; //! Resource standard for resource actions, otherwise NULL char *standard; //! Resource provider for resource actions that require it, otherwise NULL char *provider; //! Resource agent name for resource actions, otherwise NULL char *agent; int timeout; //!< Action timeout (in milliseconds) /*! A hash table of name/value pairs to use as parameters for resource and * alert actions, otherwise NULL. These will be used to set environment * variables for non-fencing resource agents and alert agents, and to send * stdin to fence agents. */ GHashTable *params; int rc; //!< Exit status of action (set by library upon completion) //!@{ //! This field should be treated as internal to Pacemaker int pid; // Process ID of child int cancel; // Whether this is a cancellation of a recurring action //!@} int status; //!< Execution status (enum pcmk_exec_status set by library) /*! Action counter (set by library for resource actions, or by caller * otherwise) */ int sequence; //!@{ //! This field should be treated as internal to Pacemaker int expected_rc; // Unused int synchronous; // Whether execution should be synchronous (blocking) //!@} enum svc_action_flags flags; //!< Flag group of enum svc_action_flags char *stderr_data; //!< Action stderr (set by library) char *stdout_data; //!< Action stdout (set by library) void *cb_data; //!< For caller's use (not used by library) //! This field should be treated as internal to Pacemaker svc_action_private_t *opaque; } svc_action_t; /*! * \brief Get a list of files or directories in a given path * * \param[in] root Full path to a directory to read * \param[in] files Return list of files if TRUE or directories if FALSE * \param[in] executable If TRUE and files is TRUE, only return executable files * * \return List of what was found as char * items. * \note The caller is responsibile for freeing the result with * g_list_free_full(list, free). */ GList *get_directory_list(const char *root, gboolean files, gboolean executable); /*! * \brief Get a list of providers * * \param[in] standard List providers of this resource agent standard * * \return List of providers as char * list items (or NULL if standard does not * support providers) * \note The caller is responsible for freeing the result using * g_list_free_full(list, free). */ GList *resources_list_providers(const char *standard); /*! * \brief Get a list of resource agents * * \param[in] standard List agents of this standard (or NULL for all) * \param[in] provider List agents of this provider (or NULL for all) * * \return List of resource agents as char * items. * \note The caller is responsible for freeing the result using * g_list_free_full(list, free). */ GList *resources_list_agents(const char *standard, const char *provider); /*! * Get list of available standards * * \return List of resource standards as char * items. * \note The caller is responsible for freeing the result using * g_list_free_full(list, free). */ GList *resources_list_standards(void); /*! * \brief Check whether a resource agent exists on the local host * * \param[in] standard Resource agent standard of agent to check * \param[in] provider Provider of agent to check (or NULL) * \param[in] agent Name of agent to check * * \return TRUE if agent exists locally, otherwise FALSE */ gboolean resources_agent_exists(const char *standard, const char *provider, const char *agent); /*! * \brief Create a new resource action * - * \param[in] name Name of resource that action is for - * \param[in] standard Resource agent standard - * \param[in] provider Resource agent provider - * \param[in] agent Resource agent name - * \param[in] action Name of action to create - * \param[in] interval_ms How often to repeat this action (if 0, execute once) - * \param[in] timeout Error if not complete within this many milliseconds - * \param[in] params Action parameters + * \param[in] name Name of resource that action is for + * \param[in] standard Resource agent standard + * \param[in] provider Resource agent provider + * \param[in] agent Resource agent name + * \param[in] action Name of action to create + * \param[in] interval_ms How often to repeat action (if 0, execute once) + * \param[in] timeout Error if not complete within this time (ms) + * \param[in,out] params Action parameters + * \param[in] flags Group of enum svc_action_flags * * \return Newly allocated action - * - * \note The returned result assumes ownership of \p params. + * \note This function assumes ownership of (and may free) \p params. * \note The caller is responsible for freeing the return value using * services_action_free(). */ svc_action_t *resources_action_create(const char *name, const char *standard, const char *provider, const char *agent, const char *action, guint interval_ms, int timeout, GHashTable *params, enum svc_action_flags flags); /*! * \brief Reschedule a recurring action for immediate execution * * \param[in] name Name of resource that action is for * \param[in] action Action's name * \param[in] interval_ms Action's interval (in milliseconds) * * \return TRUE on success, otherwise FALSE */ gboolean services_action_kick(const char *name, const char *action, guint interval_ms); const char *resources_find_service_class(const char *agent); /*! * \brief Request execution of an arbitrary command * * This API has useful infrastructure in place to be able to run a command * in the background and get notified via a callback when the command finishes. * * \param[in] exec Full path to command executable * \param[in] args NULL-terminated list of arguments to pass to command * * \return Newly allocated action object */ svc_action_t *services_action_create_generic(const char *exec, const char *args[]); void services_action_cleanup(svc_action_t *op); void services_action_free(svc_action_t *op); int services_action_user(svc_action_t *op, const char *user); gboolean services_action_sync(svc_action_t *op); /*! * \brief Run an action asynchronously, with callback after process is forked * - * \param[in] op Action to run - * \param[in] action_callback Function to call when the action completes - * (if NULL, any previously set callback will - * continue to be used) - * \param[in] action_fork_callback Function to call after action process forks - * (if NULL, any previously set callback will - * continue to be used) + * \param[in,out] op Action to run + * \param[in] action_callback Function to call when action completes + * (if NULL, any previously set callback will + * continue to be used) + * \param[in] action_fork_callback Function to call after child process is + * forked for action (if NULL, any + * previously set callback will continue to + * be used) * * \retval TRUE if the caller should not free or otherwise use \p op again, * because one of these conditions is true: * * * \p op is NULL. * * The action was successfully initiated, in which case * \p action_fork_callback has been called, but \p action_callback has * not (it will be called when the action completes). * * The action's ID matched an existing recurring action. The existing * action has taken over the callback and callback data from \p op * and has been re-initiated asynchronously, and \p op has been freed. * * Another action for the same resource is in flight, and \p op will * be blocked until it completes. * * The action could not be initiated, and is either non-recurring or * being cancelled. \p action_fork_callback has not been called, but * \p action_callback has, and \p op has been freed. * * \retval FALSE if \op is still valid, because the action cannot be initiated, * and is a recurring action that is not being cancelled. * \p action_fork_callback has not been called, but \p action_callback * has, and a timer has been set for the next invocation of \p op. */ gboolean services_action_async_fork_notify(svc_action_t *op, void (*action_callback) (svc_action_t *), void (*action_fork_callback) (svc_action_t *)); /*! * \brief Request asynchronous execution of an action * * \param[in,out] op Action to execute * \param[in] action_callback Function to call when the action completes * (if NULL, any previously set callback will * continue to be used) * * \retval TRUE if the caller should not free or otherwise use \p op again, * because one of these conditions is true: * * * \p op is NULL. * * The action was successfully initiated, in which case * \p action_callback has not been called (it will be called when the * action completes). * * The action's ID matched an existing recurring action. The existing * action has taken over the callback and callback data from \p op * and has been re-initiated asynchronously, and \p op has been freed. * * Another action for the same resource is in flight, and \p op will * be blocked until it completes. * * The action could not be initiated, and is either non-recurring or * being cancelled. \p action_callback has been called, and \p op has * been freed. * * \retval FALSE if \op is still valid, because the action cannot be initiated, * and is a recurring action that is not being cancelled. * \p action_callback has been called, and a timer has been set for the * next invocation of \p op. */ gboolean services_action_async(svc_action_t *op, void (*action_callback) (svc_action_t *)); gboolean services_action_cancel(const char *name, const char *action, guint interval_ms); /* functions for alert agents */ svc_action_t *services_alert_create(const char *id, const char *exec, int timeout, GHashTable *params, int sequence, void *cb_data); gboolean services_alert_async(svc_action_t *action, void (*cb)(svc_action_t *op)); enum ocf_exitcode services_result2ocf(const char *standard, const char *action, int exit_status); static inline const char *services_ocf_exitcode_str(enum ocf_exitcode code) { switch (code) { case PCMK_OCF_OK: return "ok"; case PCMK_OCF_UNKNOWN_ERROR: return "error"; case PCMK_OCF_INVALID_PARAM: return "invalid parameter"; case PCMK_OCF_UNIMPLEMENT_FEATURE: return "unimplemented feature"; case PCMK_OCF_INSUFFICIENT_PRIV: return "insufficient privileges"; case PCMK_OCF_NOT_INSTALLED: return "not installed"; case PCMK_OCF_NOT_CONFIGURED: return "not configured"; case PCMK_OCF_NOT_RUNNING: return "not running"; case PCMK_OCF_RUNNING_PROMOTED: return "promoted"; case PCMK_OCF_FAILED_PROMOTED: return "promoted (failed)"; case PCMK_OCF_DEGRADED: return "OCF_DEGRADED"; case PCMK_OCF_DEGRADED_PROMOTED: return "promoted (degraded)"; #if !defined(PCMK_ALLOW_DEPRECATED) || (PCMK_ALLOW_DEPRECATED == 1) case PCMK_OCF_NOT_SUPPORTED: return "not supported (DEPRECATED STATUS)"; case PCMK_OCF_CANCELLED: return "cancelled (DEPRECATED STATUS)"; case PCMK_OCF_OTHER_ERROR: return "other error (DEPRECATED STATUS)"; case PCMK_OCF_SIGNAL: return "interrupted by signal (DEPRECATED STATUS)"; case PCMK_OCF_PENDING: return "pending (DEPRECATED STATUS)"; case PCMK_OCF_TIMEOUT: return "timeout (DEPRECATED STATUS)"; #endif default: return "unknown"; } } #if !defined(PCMK_ALLOW_DEPRECATED) || (PCMK_ALLOW_DEPRECATED == 1) #include #endif # ifdef __cplusplus } # endif #endif /* __PCMK_SERVICES__ */ diff --git a/include/crm/services_internal.h b/include/crm/services_internal.h index e6f40194fa..71c08914c9 100644 --- a/include/crm/services_internal.h +++ b/include/crm/services_internal.h @@ -1,62 +1,62 @@ /* * Copyright 2010-2022 the Pacemaker project contributors * * The version control history for this file may have further details. * * This source code is licensed under the GNU Lesser General Public License * version 2.1 or later (LGPLv2.1+) WITHOUT ANY WARRANTY. */ #ifndef PCMK__SERVICES_INTERNAL__H # define PCMK__SERVICES_INTERNAL__H #ifdef __cplusplus extern "C" { #endif /*! * \brief Create a new resource action * - * \param[in] name Name of resource - * \param[in] standard Resource agent standard - * \param[in] provider Resource agent provider - * \param[in] agent Resource agent name - * \param[in] action Name of action - * \param[in] interval_ms How often to repeat this action (if 0, execute once) - * \param[in] timeout Error if not complete within this many milliseconds - * \param[in] params Action parameters - * \param[in] flags Group of enum svc_action_flags + * \param[in] name Name of resource + * \param[in] standard Resource agent standard + * \param[in] provider Resource agent provider + * \param[in] agent Resource agent name + * \param[in] action Name of action + * \param[in] interval_ms How often to repeat action (if 0, execute once) + * \param[in] timeout Error if not complete within this time (ms) + * \param[in,out] params Action parameters + * \param[in] flags Group of enum svc_action_flags * * \return NULL if not enough memory, otherwise newly allocated action instance * (if its rc member is not PCMK_OCF_UNKNOWN, the action is invalid) * - * \note The returned action assumes ownership of \p params. + * \note This function assumes ownership of (and may free) \p params. * \note The caller is responsible for freeing the return value using * services_action_free(). */ svc_action_t *services__create_resource_action(const char *name, const char *standard, const char *provider, const char *agent, const char *action, guint interval_ms, int timeout, GHashTable *params, enum svc_action_flags flags); const char *services__exit_reason(svc_action_t *action); char *services__grab_stdout(svc_action_t *action); char *services__grab_stderr(svc_action_t *action); void services__set_result(svc_action_t *action, int agent_status, enum pcmk_exec_status exec_status, const char *exit_reason); void services__format_result(svc_action_t *action, int agent_status, enum pcmk_exec_status exec_status, const char *format, ...) G_GNUC_PRINTF(4, 5); # ifdef __cplusplus } # endif #endif /* PCMK__SERVICES_INTERNAL__H */