Implement file-backed ring buffer

[lttng-ust.git] / liblttng-ust / lttng-ring-buffer-client.h

diff --git a/liblttng-ust/lttng-ring-buffer-client.h b/liblttng-ust/lttng-ring-buffer-client.h
index 96aeb1e5d7d2b5c5116ae884e9481e8e6b7370cd..79085e57a55e7dd73e4fa71b01c4b2aa21bd5142 100644 (file)
--- a/liblttng-ust/lttng-ring-buffer-client.h
+++ b/liblttng-ust/lttng-ring-buffer-client.h
@@ -388,6 +388,20 @@ static void client_buffer_finalize(struct lttng_ust_lib_ring_buffer *buf, void *
 {
 }
 
+static void client_content_size_field(const struct lttng_ust_lib_ring_buffer_config *config,
+                                     size_t *offset, size_t *length)
+{
+       *offset = offsetof(struct packet_header, ctx.content_size);
+       *length = sizeof(((struct packet_header *) NULL)->ctx.content_size);
+}
+
+static void client_packet_size_field(const struct lttng_ust_lib_ring_buffer_config *config,
+                                     size_t *offset, size_t *length)
+{
+       *offset = offsetof(struct packet_header, ctx.packet_size);
+       *length = sizeof(((struct packet_header *) NULL)->ctx.packet_size);
+}
+
 static struct packet_header *client_packet_header(struct lttng_ust_lib_ring_buffer *buf,
                struct lttng_ust_shm_handle *handle)
 {
@@ -482,6 +496,8 @@ struct lttng_ust_client_lib_ring_buffer_client_cb client_cb = {
                .buffer_end = client_buffer_end,
                .buffer_create = client_buffer_create,
                .buffer_finalize = client_buffer_finalize,
+               .content_size_field = client_content_size_field,
+               .packet_size_field = client_packet_size_field,
        },
        .timestamp_begin = client_timestamp_begin,
        .timestamp_end = client_timestamp_end,
@@ -500,6 +516,8 @@ static const struct lttng_ust_lib_ring_buffer_config client_config = {
        .cb.buffer_end = client_buffer_end,
        .cb.buffer_create = client_buffer_create,
        .cb.buffer_finalize = client_buffer_finalize,
+       .cb.content_size_field = client_content_size_field,
+       .cb.packet_size_field = client_packet_size_field,
 
        .tsc_bits = LTTNG_COMPACT_TSC_BITS,
        .alloc = RING_BUFFER_ALLOC_PER_CPU,
@@ -524,7 +542,8 @@ struct lttng_channel *_channel_create(const char *name,
                                unsigned int switch_timer_interval,
                                unsigned int read_timer_interval,
                                unsigned char *uuid,
-                               uint32_t chan_id)
+                               uint32_t chan_id,
+                               const char *shm_path)
 {
        struct lttng_channel chan_priv_init;
        struct lttng_ust_shm_handle *handle;
@@ -539,7 +558,8 @@ struct lttng_channel *_channel_create(const char *name,
                        sizeof(struct lttng_channel),
                        &chan_priv_init,
                        buf_addr, subbuf_size, num_subbuf,
-                       switch_timer_interval, read_timer_interval);
+                       switch_timer_interval, read_timer_interval,
+                       shm_path);
        if (!handle)
                return NULL;
        lttng_chan = priv;