X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Fbin%2Flttng-sessiond%2Fust-registry.h;h=a25cdc70de01f7070069fccf876273d8a814cbfc;hp=ae7ad3ae380d2751f0b669a8ef0bb5170bffc9e7;hb=HEAD;hpb=d0b96690836f4b876096f3dc14801f8e25281a77 diff --git a/src/bin/lttng-sessiond/ust-registry.h b/src/bin/lttng-sessiond/ust-registry.h deleted file mode 100644 index ae7ad3ae3..000000000 --- a/src/bin/lttng-sessiond/ust-registry.h +++ /dev/null @@ -1,205 +0,0 @@ -/* - * Copyright (C) 2013 - David Goulet - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License, version 2 only, as - * published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - * more details. - * - * You should have received a copy of the GNU General Public License along with - * this program; if not, write to the Free Software Foundation, Inc., 51 - * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. - */ - -#ifndef LTTNG_UST_REGISTRY_H -#define LTTNG_UST_REGISTRY_H - -#include -#include -#include - -#include -#include - -#define CTF_SPEC_MAJOR 1 -#define CTF_SPEC_MINOR 8 - -struct ust_app; - -struct ust_registry_session { - /* - * With multiple writers and readers, use this lock to access - * the registry. Use defined macros above to lock it. - * Can nest within the ust app session lock. - */ - pthread_mutex_t lock; - /* Next channel ID available for a newly registered channel. */ - uint32_t next_channel_id; - /* Once this value reaches UINT32_MAX, no more id can be allocated. */ - uint32_t used_channel_id; - /* Universal unique identifier used by the tracer. */ - unsigned char uuid[UUID_LEN]; - - /* session ABI description */ - - /* Size of long, in bits */ - unsigned int bits_per_long; - /* Alignment, in bits */ - unsigned int uint8_t_alignment, - uint16_t_alignment, - uint32_t_alignment, - uint64_t_alignment, - long_alignment; - /* endianness */ - int byte_order; /* BIG_ENDIAN or LITTLE_ENDIAN */ - - /* Generated metadata. */ - char *metadata; /* NOT null-terminated ! Use memcpy. */ - size_t metadata_len, metadata_alloc_len; -}; - -struct ust_registry_channel { - /* Id set when replying to a register channel. */ - uint32_t chan_id; - enum ustctl_channel_header header_type; - - /* - * Hash table containing events sent by the UST tracer. MUST be accessed - * with a RCU read side lock acquired. - */ - struct lttng_ht *ht; - /* Next event ID available for a newly registered event. */ - uint32_t next_event_id; - /* Once this value reaches UINT32_MAX, no more id can be allocated. */ - uint32_t used_event_id; - /* - * Context fields of the registry. Context are per channel. Allocated by a - * register channel notification from the UST tracer. - */ - size_t nr_ctx_fields; - struct ustctl_field *ctx_fields; -}; - -/* - * Event registered from a UST tracer sent to the session daemon. This is - * indexed and matched by . - */ -struct ust_registry_event { - int id; - /* Both objd are set by the tracer. */ - int session_objd; - int channel_objd; - /* Name of the event returned by the tracer. */ - char name[LTTNG_UST_SYM_NAME_LEN]; - char *signature; - int loglevel; - size_t nr_fields; - struct ustctl_field *fields; - char *model_emf_uri; - /* - * Node in the ust-registry hash table. The event name is used to - * initialize the node and the event_name/signature for the match function. - */ - struct lttng_ht_node_str node; -}; - -/* - * Validate that the id has reached the maximum allowed or not. - * - * Return 0 if NOT else 1. - */ -static inline int ust_registry_is_max_id(uint32_t id) -{ - return (id == UINT32_MAX) ? 1 : 0; -} - -/* - * Return next available event id and increment the used counter. The - * ust_registry_is_max_id function MUST be called before in order to validate - * if the maximum number of IDs have been reached. If not, it is safe to call - * this function. - * - * Return a unique channel ID. If max is reached, the used_event_id counter is - * returned. - */ -static inline uint32_t ust_registry_get_next_event_id( - struct ust_registry_channel *r) -{ - if (ust_registry_is_max_id(r->used_event_id)) { - return r->used_event_id; - } - - r->used_event_id++; - return r->next_event_id++; -} - -/* - * Return next available channel id and increment the used counter. The - * ust_registry_is_max_id function MUST be called before in order to validate - * if the maximum number of IDs have been reached. If not, it is safe to call - * this function. - * - * Return a unique channel ID. If max is reached, the used_channel_id counter - * is returned. - */ -static inline uint32_t ust_registry_get_next_chan_id( - struct ust_registry_session *r) -{ - if (ust_registry_is_max_id(r->used_channel_id)) { - return r->used_channel_id; - } - - r->used_channel_id++; - return r->next_channel_id++; -} - -/* - * Return registry event count. This is read atomically. - */ -static inline uint32_t ust_registry_get_event_count( - struct ust_registry_channel *r) -{ - return (uint32_t) uatomic_read(&r->used_event_id); -} - -void ust_registry_channel_init(struct ust_registry_session *session, - struct ust_registry_channel *chan); -void ust_registry_channel_destroy(struct ust_registry_session *session, - struct ust_registry_channel *chan); - -int ust_registry_session_init(struct ust_registry_session *session, - struct ust_app *app, - uint32_t bits_per_long, - uint32_t uint8_t_alignment, - uint32_t uint16_t_alignment, - uint32_t uint32_t_alignment, - uint32_t uint64_t_alignment, - uint32_t long_alignment, - int byte_order); - -void ust_registry_session_destroy(struct ust_registry_session *session); - -int ust_registry_create_event(struct ust_registry_session *session, - struct ust_registry_channel *channel, - int session_objd, int channel_objd, char *name, char *sig, - size_t nr_fields, struct ustctl_field *fields, int loglevel, - char *model_emf_uri, uint32_t *event_id); -struct ust_registry_event *ust_registry_find_event( - struct ust_registry_channel *chan, char *name, char *sig); -void ust_registry_destroy_event(struct ust_registry_channel *chan, - struct ust_registry_event *event); - -/* app can be NULL for registry shared across applications. */ -int ust_metadata_session_statedump(struct ust_registry_session *session, - struct ust_app *app); -int ust_metadata_channel_statedump(struct ust_registry_session *session, - struct ust_registry_channel *chan); -int ust_metadata_event_statedump(struct ust_registry_session *session, - struct ust_registry_channel *chan, - struct ust_registry_event *event); - -#endif /* LTTNG_UST_REGISTRY_H */