Relayd data available command support
[lttng-tools.git] / src / common / sessiond-comm / sessiond-comm.h
index e544bf5458870e880a40c20fdab61c71c51bca69..5884fb8423006c3b1ad2474d2689625b5e6b7018 100644 (file)
@@ -48,7 +48,7 @@
 /*
  * Get the error code index from 0 since LTTCOMM_OK start at 1000
  */
-#define LTTCOMM_ERR_INDEX(code) (code - LTTCOMM_OK)
+#define LTTCOMM_ERR_INDEX(code) (code - LTTCOMM_CONSUMERD_COMMAND_SOCK_READY)
 
 enum lttcomm_sessiond_command {
        /* Tracer command */
@@ -85,115 +85,31 @@ enum lttcomm_sessiond_command {
        RELAYD_VERSION,
        RELAYD_SEND_METADATA,
        RELAYD_CLOSE_STREAM,
+       RELAYD_DATA_AVAILABLE,
+       RELAYD_QUIESCENT_CONTROL,
        LTTNG_SET_FILTER,
        LTTNG_HEALTH_CHECK,
+       LTTNG_DATA_AVAILABLE,
 };
 
 /*
  * lttcomm error code.
  */
 enum lttcomm_return_code {
-       LTTCOMM_OK = 10,                                /* Ok */
-       LTTCOMM_ERR,                                    /* Unknown Error */
-       LTTCOMM_UND,                                    /* Undefine command */
-       LTTCOMM_NOT_IMPLEMENTED,        /* Command not implemented */
-       LTTCOMM_UNKNOWN_DOMAIN,         /* Tracing domain not known */
-       LTTCOMM_ALLOC_FAIL,                             /* Trace allocation fail */
-       LTTCOMM_NO_SESSION,                             /* No session found */
-       LTTCOMM_CREATE_DIR_FAIL,        /* Create directory fail */
-       LTTCOMM_SESSION_FAIL,                   /* Create session fail */
-       LTTCOMM_START_FAIL,                             /* Start tracing fail */
-       LTTCOMM_STOP_FAIL,                              /* Stop tracing fail */
-       LTTCOMM_LIST_FAIL,                              /* Listing apps fail */
-       LTTCOMM_NO_APPS,                                /* No traceable application */
-       LTTCOMM_SESS_NOT_FOUND,                 /* Session name not found */
-       LTTCOMM_NO_TRACE,                               /* No trace exist */
-       LTTCOMM_FATAL,                                  /* Session daemon had a fatal error */
-       LTTCOMM_NO_TRACEABLE,                   /* Error for non traceable app */
-       LTTCOMM_SELECT_SESS,                    /* Must select a session */
-       LTTCOMM_EXIST_SESS,                             /* Session name already exist */
-       LTTCOMM_NO_EVENT,                               /* No event found */
-       LTTCOMM_CONNECT_FAIL,           /* Unable to connect to unix socket */
-       LTTCOMM_APP_NOT_FOUND,          /* App not found in traceable app list */
-       LTTCOMM_EPERM,                  /* Permission denied */
-       LTTCOMM_KERN_NA,                                /* Kernel tracer unavalable */
-       LTTCOMM_KERN_VERSION,           /* Kernel tracer version is not compatible */
-       LTTCOMM_KERN_EVENT_EXIST,       /* Kernel event already exists */
-       LTTCOMM_KERN_SESS_FAIL,                 /* Kernel create session failed */
-       LTTCOMM_KERN_CHAN_EXIST,        /* Kernel channel already exists */
-       LTTCOMM_KERN_CHAN_FAIL,                 /* Kernel create channel failed */
-       LTTCOMM_KERN_CHAN_NOT_FOUND,    /* Kernel channel not found */
-       LTTCOMM_KERN_CHAN_DISABLE_FAIL, /* Kernel disable channel failed */
-       LTTCOMM_KERN_CHAN_ENABLE_FAIL,  /* Kernel enable channel failed */
-       LTTCOMM_KERN_CONTEXT_FAIL,      /* Kernel add context failed */
-       LTTCOMM_KERN_ENABLE_FAIL,               /* Kernel enable event failed */
-       LTTCOMM_KERN_DISABLE_FAIL,              /* Kernel disable event failed */
-       LTTCOMM_KERN_META_FAIL,                 /* Kernel open metadata failed */
-       LTTCOMM_KERN_START_FAIL,                /* Kernel start trace failed */
-       LTTCOMM_KERN_STOP_FAIL,                 /* Kernel stop trace failed */
-       LTTCOMM_KERN_CONSUMER_FAIL,             /* Kernel consumer start failed */
-       LTTCOMM_KERN_STREAM_FAIL,               /* Kernel create stream failed */
-       LTTCOMM_KERN_DIR_FAIL,                  /* Kernel trace directory creation failed */
-       LTTCOMM_KERN_DIR_EXIST,                 /* Kernel trace directory exist */
-       LTTCOMM_KERN_NO_SESSION,                /* No kernel session found */
-       LTTCOMM_KERN_LIST_FAIL,                 /* Kernel listing events failed */
-       LTTCOMM_UST_CALIBRATE_FAIL,     /* UST calibration failed */
-       LTTCOMM_UST_VERSION,            /* UST tracer version is not compatible */
-       LTTCOMM_UST_SESS_FAIL,                  /* UST create session failed */
-       LTTCOMM_UST_CHAN_EXIST,         /* UST channel already exist */
-       LTTCOMM_UST_CHAN_FAIL,                  /* UST create channel failed */
-       LTTCOMM_UST_CHAN_NOT_FOUND,     /* UST channel not found */
-       LTTCOMM_UST_CHAN_DISABLE_FAIL, /* UST disable channel failed */
-       LTTCOMM_UST_CHAN_ENABLE_FAIL,  /* UST enable channel failed */
-       LTTCOMM_UST_CONTEXT_FAIL,      /* UST add context failed */
-       LTTCOMM_UST_ENABLE_FAIL,                /* UST enable event failed */
-       LTTCOMM_UST_DISABLE_FAIL,               /* UST disable event failed */
-       LTTCOMM_UST_META_FAIL,                  /* UST open metadata failed */
-       LTTCOMM_UST_START_FAIL,         /* UST start trace failed */
-       LTTCOMM_UST_STOP_FAIL,                  /* UST stop trace failed */
-       LTTCOMM_UST_CONSUMER64_FAIL,            /* 64-bit UST consumer start failed */
-       LTTCOMM_UST_CONSUMER32_FAIL,            /* 32-bit UST consumer start failed */
-       LTTCOMM_UST_STREAM_FAIL,                /* UST create stream failed */
-       LTTCOMM_UST_DIR_FAIL,                   /* UST trace directory creation failed */
-       LTTCOMM_UST_DIR_EXIST,                  /* UST trace directory exist */
-       LTTCOMM_UST_NO_SESSION,         /* No UST session found */
-       LTTCOMM_UST_LIST_FAIL,                  /* UST listing events failed */
-       LTTCOMM_UST_EVENT_EXIST,        /* UST event exist */
-       LTTCOMM_UST_EVENT_NOT_FOUND,    /* UST event not found */
-       LTTCOMM_UST_CONTEXT_EXIST,      /* UST context exist */
-       LTTCOMM_UST_CONTEXT_INVAL,      /* UST context invalid */
-       LTTCOMM_NEED_ROOT_SESSIOND,             /* root sessiond is needed */
-       LTTCOMM_TRACE_ALREADY_STARTED,  /* Tracing already started */
-       LTTCOMM_TRACE_ALREADY_STOPPED,  /* Tracing already stopped */
-       LTTCOMM_KERN_EVENT_ENOSYS,      /* Kernel event type not supported */
-
-       CONSUMERD_COMMAND_SOCK_READY,           /* when consumerd command socket ready */
-       CONSUMERD_SUCCESS_RECV_FD,              /* success on receiving fds */
-       CONSUMERD_ERROR_RECV_FD,                /* error on receiving fds */
-       CONSUMERD_ERROR_RECV_CMD,               /* error on receiving command */
-       CONSUMERD_POLL_ERROR,                   /* Error in polling thread in kconsumerd */
-       CONSUMERD_POLL_NVAL,                    /* Poll on closed fd */
-       CONSUMERD_POLL_HUP,                     /* All fds have hungup */
-       CONSUMERD_EXIT_SUCCESS,                 /* kconsumerd exiting normally */
-       CONSUMERD_EXIT_FAILURE,                 /* kconsumerd exiting on error */
-       CONSUMERD_OUTFD_ERROR,                  /* error opening the tracefile */
-       CONSUMERD_SPLICE_EBADF,                 /* EBADF from splice(2) */
-       CONSUMERD_SPLICE_EINVAL,                /* EINVAL from splice(2) */
-       CONSUMERD_SPLICE_ENOMEM,                /* ENOMEM from splice(2) */
-       CONSUMERD_SPLICE_ESPIPE,                /* ESPIPE from splice(2) */
-       LTTCOMM_INVALID,                        /* Invalid parameter */
-       LTTCOMM_NO_USTCONSUMERD,        /* No UST consumer detected */
-       LTTCOMM_NO_KERNCONSUMERD,       /* No Kernel consumer detected */
-       LTTCOMM_EVENT_EXIST_LOGLEVEL,   /* Event already enabled with different loglevel */
-       LTTCOMM_URL_DATA_MISS,          /* Missing network data URL */
-       LTTCOMM_URL_CTRL_MISS,          /* Missing network control URL */
-       LTTCOMM_ENABLE_CONSUMER_FAIL,   /* Enabling consumer failed */
-       LTTCOMM_RELAYD_SESSION_FAIL,    /* lttng-relayd create session failed */
-       LTTCOMM_RELAYD_VERSION_FAIL,    /* lttng-relayd not compatible */
-       LTTCOMM_FILTER_INVAL,           /* Invalid filter bytecode */
-       LTTCOMM_FILTER_NOMEM,           /* Lack of memory for filter bytecode */
-       LTTCOMM_FILTER_EXIST,           /* Filter already exist */
-       LTTCOMM_NO_CONSUMER,            /* No consumer exist for the tracing session */
+       LTTCOMM_CONSUMERD_COMMAND_SOCK_READY = 1,   /* Command socket ready */
+       LTTCOMM_CONSUMERD_SUCCESS_RECV_FD,          /* Success on receiving fds */
+       LTTCOMM_CONSUMERD_ERROR_RECV_FD,            /* Error on receiving fds */
+       LTTCOMM_CONSUMERD_ERROR_RECV_CMD,           /* Error on receiving command */
+       LTTCOMM_CONSUMERD_POLL_ERROR,               /* Error in polling thread */
+       LTTCOMM_CONSUMERD_POLL_NVAL,                /* Poll on closed fd */
+       LTTCOMM_CONSUMERD_POLL_HUP,                 /* All fds have hungup */
+       LTTCOMM_CONSUMERD_EXIT_SUCCESS,             /* Consumerd exiting normally */
+       LTTCOMM_CONSUMERD_EXIT_FAILURE,             /* Consumerd exiting on error */
+       LTTCOMM_CONSUMERD_OUTFD_ERROR,              /* Error opening the tracefile */
+       LTTCOMM_CONSUMERD_SPLICE_EBADF,             /* EBADF from splice(2) */
+       LTTCOMM_CONSUMERD_SPLICE_EINVAL,            /* EINVAL from splice(2) */
+       LTTCOMM_CONSUMERD_SPLICE_ENOMEM,            /* ENOMEM from splice(2) */
+       LTTCOMM_CONSUMERD_SPLICE_ESPIPE,            /* ESPIPE from splice(2) */
 
        /* MUST be last element */
        LTTCOMM_NR,                                             /* Last element */
@@ -254,12 +170,12 @@ struct lttcomm_session_msg {
        struct lttng_domain domain;
        union {
                struct {
-                       char channel_name[NAME_MAX];
+                       char channel_name[LTTNG_SYMBOL_NAME_LEN];
                        char name[NAME_MAX];
                } disable;
                /* Event data */
                struct {
-                       char channel_name[NAME_MAX];
+                       char channel_name[LTTNG_SYMBOL_NAME_LEN];
                        struct lttng_event event;
                } enable;
                /* Create channel */
@@ -268,8 +184,8 @@ struct lttcomm_session_msg {
                } channel;
                /* Context */
                struct {
-                       char channel_name[NAME_MAX];
-                       char event_name[NAME_MAX];
+                       char channel_name[LTTNG_SYMBOL_NAME_LEN];
+                       char event_name[LTTNG_SYMBOL_NAME_LEN];
                        struct lttng_event_context ctx;
                } context;
                /* Use by register_consumer */
@@ -278,7 +194,7 @@ struct lttcomm_session_msg {
                } reg;
                /* List */
                struct {
-                       char channel_name[NAME_MAX];
+                       char channel_name[LTTNG_SYMBOL_NAME_LEN];
                } list;
                struct lttng_calibrate calibrate;
                /* Used by the set_consumer_url and used by create_session also call */
@@ -287,15 +203,15 @@ struct lttcomm_session_msg {
                        uint32_t size;
                } uri;
                struct {
-                       char channel_name[NAME_MAX];
-                       char event_name[NAME_MAX];
+                       char channel_name[LTTNG_SYMBOL_NAME_LEN];
+                       char event_name[LTTNG_SYMBOL_NAME_LEN];
                        /* Length of following bytecode */
                        uint32_t bytecode_len;
                } filter;
        } u;
 };
 
-#define LTTNG_FILTER_MAX_LEN   65336
+#define LTTNG_FILTER_MAX_LEN   65536
 
 /*
  * Filter bytecode data. The reloc table is located at the end of the
@@ -303,8 +219,8 @@ struct lttcomm_session_msg {
  * starts at reloc_table_offset.
  */
 struct lttng_filter_bytecode {
-       uint16_t len;   /* len of data */
-       uint16_t reloc_table_offset;
+       uint32_t len;   /* len of data */
+       uint32_t reloc_table_offset;
        char data[0];
 };
 
@@ -342,6 +258,8 @@ struct lttcomm_consumer_msg {
                        uint64_t max_sb_size; /* the subbuffer size for this channel */
                        /* shm_fd and wait_fd are sent as ancillary data */
                        uint64_t mmap_len;
+                       /* nb_init_streams is the number of streams open initially. */
+                       unsigned int nb_init_streams;
                        char name[LTTNG_SYMBOL_NAME_LEN];
                } channel;
                struct {
@@ -357,6 +275,7 @@ struct lttcomm_consumer_msg {
                        int net_index;
                        unsigned int metadata_flag;
                        char name[LTTNG_SYMBOL_NAME_LEN];  /* Name string of the stream */
+                       uint64_t session_id;   /* Tracing session id of the stream */
                } stream;
                struct {
                        int net_index;
@@ -367,6 +286,9 @@ struct lttcomm_consumer_msg {
                struct {
                        uint64_t net_seq_idx;
                } destroy_relayd;
+               struct {
+                       uint64_t session_id;
+               } data_available;
        } u;
 };
 
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