sessiond: document effect of rotated_after_last_stop on clear

[lttng-tools.git] / src / bin / lttng-sessiond / buffer-registry.h

diff --git a/src/bin/lttng-sessiond/buffer-registry.h b/src/bin/lttng-sessiond/buffer-registry.h
index cb976dcdc3db25609bb32838a8abe50266908439..415793c9511e4387c4c4529a074ecfe68b35db8d 100644 (file)
--- a/src/bin/lttng-sessiond/buffer-registry.h
+++ b/src/bin/lttng-sessiond/buffer-registry.h
@@ -25,7 +25,7 @@
 #include <common/hashtable/hashtable.h>
 
 #include "consumer.h"
-#include "ust-ctl.h"
+#include "lttng-ust-ctl.h"
 #include "ust-registry.h"
 
 struct buffer_reg_stream {
@@ -43,10 +43,16 @@ struct buffer_reg_channel {
        uint64_t consumer_key;
        /* Stream registry object of this channel registry. */
        struct cds_list_head streams;
+       /* Total number of stream in the list. */
+       uint64_t stream_count;
        /* Used to ensure mutual exclusion to the stream's list. */
        pthread_mutex_t stream_list_lock;
        /* Node for hash table usage. */
        struct lttng_ht_node_u64 node;
+       /* Size of subbuffers in this channel. */
+       size_t subbuf_size;
+       /* Number of subbuffers per stream. */
+       size_t num_subbuf;
        union {
                /* Original object data that MUST be copied over. */
                struct lttng_ust_object_data *ust;
@@ -82,6 +88,9 @@ struct buffer_reg_uid {
        struct lttng_ht_node_u64 node;
        /* Node of a linked list used to teardown object at a destroy session. */
        struct cds_list_head lnode;
+
+       char root_shm_path[PATH_MAX];
+       char shm_path[PATH_MAX];
 };
 
 /*
@@ -94,12 +103,16 @@ struct buffer_reg_pid {
 
        /* Indexed by session id. */
        struct lttng_ht_node_u64 node;
+
+       char root_shm_path[PATH_MAX];
+       char shm_path[PATH_MAX];
 };
 
 /* Buffer registry per UID. */
 void buffer_reg_init_uid_registry(void);
 int buffer_reg_uid_create(uint64_t session_id, uint32_t bits_per_long, uid_t uid,
-               enum lttng_domain_type domain, struct buffer_reg_uid **regp);
+               enum lttng_domain_type domain, struct buffer_reg_uid **regp,
+               const char *root_shm_path, const char *shm_path);
 void buffer_reg_uid_add(struct buffer_reg_uid *reg);
 struct buffer_reg_uid *buffer_reg_uid_find(uint64_t session_id,
                uint32_t bits_per_long, uid_t uid);
@@ -109,7 +122,8 @@ void buffer_reg_uid_destroy(struct buffer_reg_uid *regp,
 
 /* Buffer registry per PID. */
 void buffer_reg_init_pid_registry(void);
-int buffer_reg_pid_create(uint64_t session_id, struct buffer_reg_pid **regp);
+int buffer_reg_pid_create(uint64_t session_id, struct buffer_reg_pid **regp,
+               const char *root_shm_path, const char *shm_path);
 void buffer_reg_pid_add(struct buffer_reg_pid *reg);
 struct buffer_reg_pid *buffer_reg_pid_find(uint64_t session_id);
 void buffer_reg_pid_remove(struct buffer_reg_pid *regp);
@@ -136,4 +150,8 @@ void buffer_reg_stream_destroy(struct buffer_reg_stream *regp,
 /* Global registry. */
 void buffer_reg_destroy_registries(void);
 
+int buffer_reg_uid_consumer_channel_key(
+               struct cds_list_head *buffer_reg_uid_list,
+               uint64_t chan_key, uint64_t *consumer_chan_key);
+
 #endif /* LTTNG_BUFFER_REGISTRY_H */