Refactoring: struct lttng_channel_ops

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

diff --git a/liblttng-ust/lttng-ring-buffer-metadata-client.h b/liblttng-ust/lttng-ring-buffer-metadata-client.h
index f3c4a67c8843ea0e9514ff994e04ed16ef979c08..bb5c5dfe8abb2d1160ec0c256d7b98ff8ae4e6d9 100644 (file)
--- a/liblttng-ust/lttng-ring-buffer-metadata-client.h
+++ b/liblttng-ust/lttng-ring-buffer-metadata-client.h
@@ -1,28 +1,17 @@
 /*
- * lttng-ring-buffer-client.h
- *
- * LTTng lib ring buffer client template.
+ * SPDX-License-Identifier: LGPL-2.1-only
  *
  * Copyright (C) 2010-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
  *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; only
- * version 2.1 of the License.
- *
- * This library 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
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ * LTTng lib ring buffer client template.
  */
 
+#include <stddef.h>
 #include <stdint.h>
-#include <lttng/ust-events.h>
-#include "lttng/bitfield.h"
+
+#include <ust-events-internal.h>
+#include "ust-bitfield.h"
+#include "ust-compat.h"
 #include "lttng-tracer.h"
 #include "../libringbuffer/frontend_types.h"
 
@@ -55,7 +44,8 @@ static inline
 size_t record_header_size(const struct lttng_ust_lib_ring_buffer_config *config,
                                 struct channel *chan, size_t offset,
                                 size_t *pre_header_padding,
-                                struct lttng_ust_lib_ring_buffer_ctx *ctx)
+                                struct lttng_ust_lib_ring_buffer_ctx *ctx,
+                                void *client_ctx)
 {
        return 0;
 }
@@ -72,7 +62,8 @@ static
 size_t client_record_header_size(const struct lttng_ust_lib_ring_buffer_config *config,
                                 struct channel *chan, size_t offset,
                                 size_t *pre_header_padding,
-                                struct lttng_ust_lib_ring_buffer_ctx *ctx)
+                                struct lttng_ust_lib_ring_buffer_ctx *ctx,
+                                void *client_ctx)
 {
        return 0;
 }
@@ -136,7 +127,7 @@ static void client_buffer_end(struct lttng_ust_lib_ring_buffer *buf, uint64_t ts
        if (!header)
                return;
        header->content_size = data_size * CHAR_BIT;            /* in bits */
-       header->packet_size = PAGE_ALIGN(data_size) * CHAR_BIT; /* in bits */
+       header->packet_size = LTTNG_UST_PAGE_ALIGN(data_size) * CHAR_BIT; /* in bits */
        /*
         * We do not care about the records lost count, because the metadata
         * channel waits and retry.
@@ -196,8 +187,6 @@ static const struct lttng_ust_lib_ring_buffer_config client_config = {
         .cb_ptr = &client_cb.parent,
 };
 
-const struct lttng_ust_client_lib_ring_buffer_client_cb *LTTNG_CLIENT_CALLBACKS = &client_cb;
-
 static
 struct lttng_channel *_channel_create(const char *name,
                                void *buf_addr,
@@ -206,7 +195,8 @@ struct lttng_channel *_channel_create(const char *name,
                                unsigned int read_timer_interval,
                                unsigned char *uuid,
                                uint32_t chan_id,
-                               const int *stream_fds, int nr_stream_fds)
+                               const int *stream_fds, int nr_stream_fds,
+                               int64_t blocking_timeout)
 {
        struct lttng_channel chan_priv_init;
        struct lttng_ust_shm_handle *handle;
@@ -222,7 +212,7 @@ struct lttng_channel *_channel_create(const char *name,
                        &chan_priv_init,
                        buf_addr, subbuf_size, num_subbuf,
                        switch_timer_interval, read_timer_interval,
-                       stream_fds, nr_stream_fds);
+                       stream_fds, nr_stream_fds, blocking_timeout);
        if (!handle)
                return NULL;
        lttng_chan = priv;
@@ -240,7 +230,15 @@ void lttng_channel_destroy(struct lttng_channel *chan)
 static
 int lttng_event_reserve(struct lttng_ust_lib_ring_buffer_ctx *ctx, uint32_t event_id)
 {
-       return lib_ring_buffer_reserve(&client_config, ctx);
+       int ret;
+
+       ret = lib_ring_buffer_reserve(&client_config, ctx, NULL);
+       if (ret)
+               return ret;
+       if (lib_ring_buffer_backend_get_pages(&client_config, ctx,
+                       &ctx->backend_pages))
+               return -EPERM;
+       return 0;
 }
 
 static
@@ -258,7 +256,6 @@ void lttng_event_write(struct lttng_ust_lib_ring_buffer_ctx *ctx, const void *sr
 
 static
 size_t lttng_packet_avail_size(struct channel *chan, struct lttng_ust_shm_handle *handle)
-                            
 {
        unsigned long o_begin;
        struct lttng_ust_lib_ring_buffer *buf;
@@ -317,14 +314,14 @@ int lttng_flush_buffer(struct channel *chan, struct lttng_ust_shm_handle *handle
 static struct lttng_transport lttng_relay_transport = {
        .name = "relay-" RING_BUFFER_MODE_TEMPLATE_STRING "-mmap",
        .ops = {
+               .struct_size = sizeof(struct lttng_ust_channel_ops),
+
                .channel_create = _channel_create,
                .channel_destroy = lttng_channel_destroy,
                .event_reserve = lttng_event_reserve,
                .event_commit = lttng_event_commit,
                .event_write = lttng_event_write,
                .packet_avail_size = lttng_packet_avail_size,
-               //.get_reader_wait_queue = lttng_get_reader_wait_queue,
-               //.get_hp_wait_queue = lttng_get_hp_wait_queue,
                .is_finalized = lttng_is_finalized,
                .is_disabled = lttng_is_disabled,
                .flush_buffer = lttng_flush_buffer,