Refactoring: struct lttng_channel

[lttng-modules.git] / src / lttng-ring-buffer-client.h

diff --git a/src/lttng-ring-buffer-client.h b/src/lttng-ring-buffer-client.h
index cec656af5a7c20898c8b8db61226902dcf5edc0a..e8f94e24df9407c6bfffcd0de85a63aec05e8843 100644 (file)
--- a/src/lttng-ring-buffer-client.h
+++ b/src/lttng-ring-buffer-client.h
@@ -89,7 +89,8 @@ size_t ctx_get_aligned_size(size_t offset, struct lttng_kernel_ctx *ctx,
 
 static inline
 void ctx_get_struct_size(struct lttng_kernel_ctx *ctx, size_t *ctx_len,
-               struct lttng_channel *chan, struct lib_ring_buffer_ctx *bufctx)
+               struct lttng_kernel_channel_buffer *lttng_chan,
+               struct lttng_kernel_ring_buffer_ctx *bufctx)
 {
        int i;
        size_t offset = 0;
@@ -106,8 +107,8 @@ void ctx_get_struct_size(struct lttng_kernel_ctx *ctx, size_t *ctx_len,
 }
 
 static inline
-void ctx_record(struct lib_ring_buffer_ctx *bufctx,
-               struct lttng_channel *chan,
+void ctx_record(struct lttng_kernel_ring_buffer_ctx *bufctx,
+               struct lttng_kernel_channel_buffer *lttng_chan,
                struct lttng_kernel_ctx *ctx)
 {
        int i;
@@ -117,7 +118,7 @@ void ctx_record(struct lib_ring_buffer_ctx *bufctx,
        lib_ring_buffer_align_ctx(bufctx, ctx->largest_align);
        for (i = 0; i < ctx->nr_fields; i++)
                ctx->fields[i].record(ctx->fields[i].priv, bufctx->probe_ctx,
-                               bufctx, chan);
+                               bufctx, lttng_chan);
 }
 
 /*
@@ -137,14 +138,14 @@ static __inline__
 size_t record_header_size(const struct lib_ring_buffer_config *config,
                                 struct channel *chan, size_t offset,
                                 size_t *pre_header_padding,
-                                struct lib_ring_buffer_ctx *ctx,
+                                struct lttng_kernel_ring_buffer_ctx *ctx,
                                 struct lttng_client_ctx *client_ctx)
 {
-       struct lttng_channel *lttng_chan = channel_get_private(chan);
+       struct lttng_kernel_channel_buffer *lttng_chan = channel_get_private(chan);
        size_t orig_offset = offset;
        size_t padding;
 
-       switch (lttng_chan->header_type) {
+       switch (lttng_chan->priv->header_type) {
        case 1: /* compact */
                padding = lib_ring_buffer_align(offset, lttng_alignof(uint32_t));
                offset += padding;
@@ -179,7 +180,7 @@ size_t record_header_size(const struct lib_ring_buffer_config *config,
                padding = 0;
                WARN_ON_ONCE(1);
        }
-       offset += ctx_get_aligned_size(offset, lttng_chan->ctx,
+       offset += ctx_get_aligned_size(offset, lttng_chan->priv->ctx,
                        client_ctx->packet_context_len);
        *pre_header_padding = padding;
        return offset - orig_offset;
@@ -189,7 +190,7 @@ size_t record_header_size(const struct lib_ring_buffer_config *config,
 
 static
 void lttng_write_event_header_slow(const struct lib_ring_buffer_config *config,
-                                struct lib_ring_buffer_ctx *ctx,
+                                struct lttng_kernel_ring_buffer_ctx *ctx,
                                 uint32_t event_id);
 
 /*
@@ -203,15 +204,15 @@ void lttng_write_event_header_slow(const struct lib_ring_buffer_config *config,
  */
 static __inline__
 void lttng_write_event_header(const struct lib_ring_buffer_config *config,
-                           struct lib_ring_buffer_ctx *ctx,
+                           struct lttng_kernel_ring_buffer_ctx *ctx,
                            uint32_t event_id)
 {
-       struct lttng_channel *lttng_chan = channel_get_private(ctx->priv.chan);
+       struct lttng_kernel_channel_buffer *lttng_chan = channel_get_private(ctx->priv.chan);
 
        if (unlikely(ctx->priv.rflags))
                goto slow_path;
 
-       switch (lttng_chan->header_type) {
+       switch (lttng_chan->priv->header_type) {
        case 1: /* compact */
        {
                uint32_t id_time = 0;
@@ -241,7 +242,7 @@ void lttng_write_event_header(const struct lib_ring_buffer_config *config,
                WARN_ON_ONCE(1);
        }
 
-       ctx_record(ctx, lttng_chan, lttng_chan->ctx);
+       ctx_record(ctx, lttng_chan, lttng_chan->priv->ctx);
        lib_ring_buffer_align_ctx(ctx, ctx->largest_align);
 
        return;
@@ -252,12 +253,12 @@ slow_path:
 
 static
 void lttng_write_event_header_slow(const struct lib_ring_buffer_config *config,
-                                struct lib_ring_buffer_ctx *ctx,
+                                struct lttng_kernel_ring_buffer_ctx *ctx,
                                 uint32_t event_id)
 {
-       struct lttng_channel *lttng_chan = channel_get_private(ctx->priv.chan);
+       struct lttng_kernel_channel_buffer *lttng_chan = channel_get_private(ctx->priv.chan);
 
-       switch (lttng_chan->header_type) {
+       switch (lttng_chan->priv->header_type) {
        case 1: /* compact */
                if (!(ctx->priv.rflags & (RING_BUFFER_RFLAG_FULL_TSC | LTTNG_RFLAG_EXTENDED))) {
                        uint32_t id_time = 0;
@@ -311,7 +312,7 @@ void lttng_write_event_header_slow(const struct lib_ring_buffer_config *config,
        default:
                WARN_ON_ONCE(1);
        }
-       ctx_record(ctx, lttng_chan, lttng_chan->ctx);
+       ctx_record(ctx, lttng_chan, lttng_chan->priv->ctx);
        lib_ring_buffer_align_ctx(ctx, ctx->largest_align);
 }
 
@@ -326,7 +327,7 @@ static
 size_t client_record_header_size(const struct lib_ring_buffer_config *config,
                                 struct channel *chan, size_t offset,
                                 size_t *pre_header_padding,
-                                struct lib_ring_buffer_ctx *ctx,
+                                struct lttng_kernel_ring_buffer_ctx *ctx,
                                 void *client_ctx)
 {
        return record_header_size(config, chan, offset,
@@ -353,12 +354,12 @@ static void client_buffer_begin(struct lib_ring_buffer *buf, u64 tsc,
                (struct packet_header *)
                        lib_ring_buffer_offset_address(&buf->backend,
                                subbuf_idx * chan->backend.subbuf_size);
-       struct lttng_channel *lttng_chan = channel_get_private(chan);
-       struct lttng_session *session = lttng_chan->session;
+       struct lttng_kernel_channel_buffer *lttng_chan = channel_get_private(chan);
+       struct lttng_kernel_session *session = lttng_chan->parent.session;
 
        header->magic = CTF_MAGIC_NUMBER;
-       memcpy(header->uuid, session->uuid.b, sizeof(session->uuid));
-       header->stream_id = lttng_chan->id;
+       memcpy(header->uuid, session->priv->uuid.b, sizeof(session->priv->uuid));
+       header->stream_id = lttng_chan->priv->id;
        header->stream_instance_id = buf->backend.cpu;
        header->ctx.timestamp_begin = tsc;
        header->ctx.timestamp_end = 0;
@@ -468,9 +469,9 @@ static int client_stream_id(const struct lib_ring_buffer_config *config,
                        uint64_t *stream_id)
 {
        struct channel *chan = buf->backend.chan;
-       struct lttng_channel *lttng_chan = channel_get_private(chan);
+       struct lttng_kernel_channel_buffer *lttng_chan = channel_get_private(chan);
 
-       *stream_id = lttng_chan->id;
+       *stream_id = lttng_chan->priv->id;
        return 0;
 }
 
@@ -543,7 +544,7 @@ struct channel *_channel_create(const char *name,
                                unsigned int switch_timer_interval,
                                unsigned int read_timer_interval)
 {
-       struct lttng_channel *lttng_chan = priv;
+       struct lttng_kernel_channel_buffer *lttng_chan = priv;
        struct channel *chan;
 
        chan = channel_create(&client_config, name, lttng_chan, buf_addr,
@@ -603,10 +604,10 @@ void lttng_buffer_read_close(struct lib_ring_buffer *buf)
 }
 
 static
-int lttng_event_reserve(struct lib_ring_buffer_ctx *ctx)
+int lttng_event_reserve(struct lttng_kernel_ring_buffer_ctx *ctx)
 {
        struct lttng_kernel_event_recorder *event_recorder = ctx->client_priv;
-       struct lttng_channel *lttng_chan = event_recorder->chan;
+       struct lttng_kernel_channel_buffer *lttng_chan = event_recorder->chan;
        struct lttng_client_ctx client_ctx;
        int ret, cpu;
        uint32_t event_id;
@@ -616,13 +617,13 @@ int lttng_event_reserve(struct lib_ring_buffer_ctx *ctx)
                return -EPERM;
        event_id = event_recorder->priv->id;
        memset(&ctx->priv, 0, sizeof(ctx->priv));
-       ctx->priv.chan = lttng_chan->chan;
+       ctx->priv.chan = lttng_chan->priv->rb_chan;
        ctx->priv.reserve_cpu = cpu;
 
        /* Compute internal size of context structures. */
-       ctx_get_struct_size(lttng_chan->ctx, &client_ctx.packet_context_len, lttng_chan, ctx);
+       ctx_get_struct_size(lttng_chan->priv->ctx, &client_ctx.packet_context_len, lttng_chan, ctx);
 
-       switch (lttng_chan->header_type) {
+       switch (lttng_chan->priv->header_type) {
        case 1: /* compact */
                if (event_id > 30)
                        ctx->priv.rflags |= LTTNG_RFLAG_EXTENDED;
@@ -648,48 +649,54 @@ put:
 }
 
 static
-void lttng_event_commit(struct lib_ring_buffer_ctx *ctx)
+void lttng_event_commit(struct lttng_kernel_ring_buffer_ctx *ctx)
 {
        lib_ring_buffer_commit(&client_config, ctx);
        lib_ring_buffer_put_cpu(&client_config);
 }
 
 static
-void lttng_event_write(struct lib_ring_buffer_ctx *ctx, const void *src,
+void lttng_event_write(struct lttng_kernel_ring_buffer_ctx *ctx, const void *src,
                     size_t len)
 {
        lib_ring_buffer_write(&client_config, ctx, src, len);
 }
 
 static
-void lttng_event_write_from_user(struct lib_ring_buffer_ctx *ctx,
+void lttng_event_write_from_user(struct lttng_kernel_ring_buffer_ctx *ctx,
                               const void __user *src, size_t len)
 {
        lib_ring_buffer_copy_from_user_inatomic(&client_config, ctx, src, len);
 }
 
 static
-void lttng_event_memset(struct lib_ring_buffer_ctx *ctx,
+void lttng_event_memset(struct lttng_kernel_ring_buffer_ctx *ctx,
                int c, size_t len)
 {
        lib_ring_buffer_memset(&client_config, ctx, c, len);
 }
 
 static
-void lttng_event_strcpy(struct lib_ring_buffer_ctx *ctx, const char *src,
+void lttng_event_strcpy(struct lttng_kernel_ring_buffer_ctx *ctx, const char *src,
                size_t len)
 {
        lib_ring_buffer_strcpy(&client_config, ctx, src, len, '#');
 }
 
 static
-void lttng_event_strcpy_from_user(struct lib_ring_buffer_ctx *ctx,
+void lttng_event_strcpy_from_user(struct lttng_kernel_ring_buffer_ctx *ctx,
                const char __user *src, size_t len)
 {
        lib_ring_buffer_strcpy_from_user_inatomic(&client_config, ctx, src,
                        len, '#');
 }
 
+static
+void lttng_channel_buffer_lost_event_too_big(struct lttng_kernel_channel_buffer *lttng_chan)
+{
+       lib_ring_buffer_lost_event_too_big(lttng_chan->priv->rb_chan);
+}
+
 static
 wait_queue_head_t *lttng_get_writer_buf_wait_queue(struct channel *chan, int cpu)
 {
@@ -720,12 +727,29 @@ static struct lttng_transport lttng_relay_transport = {
        .name = "relay-" RING_BUFFER_MODE_TEMPLATE_STRING,
        .owner = THIS_MODULE,
        .ops = {
-               .channel_create = _channel_create,
-               .channel_destroy = lttng_channel_destroy,
-               .buffer_read_open = lttng_buffer_read_open,
-               .buffer_has_read_closed_stream =
-                       lttng_buffer_has_read_closed_stream,
-               .buffer_read_close = lttng_buffer_read_close,
+               .priv = __LTTNG_COMPOUND_LITERAL(struct lttng_kernel_channel_buffer_ops_private, {
+                       .pub = &lttng_relay_transport.ops,
+                       .channel_create = _channel_create,
+                       .channel_destroy = lttng_channel_destroy,
+                       .buffer_read_open = lttng_buffer_read_open,
+                       .buffer_has_read_closed_stream =
+                               lttng_buffer_has_read_closed_stream,
+                       .buffer_read_close = lttng_buffer_read_close,
+                       .packet_avail_size = NULL,      /* Would be racy anyway */
+                       .get_writer_buf_wait_queue = lttng_get_writer_buf_wait_queue,
+                       .get_hp_wait_queue = lttng_get_hp_wait_queue,
+                       .is_finalized = lttng_is_finalized,
+                       .is_disabled = lttng_is_disabled,
+                       .timestamp_begin = client_timestamp_begin,
+                       .timestamp_end = client_timestamp_end,
+                       .events_discarded = client_events_discarded,
+                       .content_size = client_content_size,
+                       .packet_size = client_packet_size,
+                       .stream_id = client_stream_id,
+                       .current_timestamp = client_current_timestamp,
+                       .sequence_number = client_sequence_number,
+                       .instance_id = client_instance_id,
+               }),
                .event_reserve = lttng_event_reserve,
                .event_commit = lttng_event_commit,
                .event_write = lttng_event_write,
@@ -733,20 +757,7 @@ static struct lttng_transport lttng_relay_transport = {
                .event_memset = lttng_event_memset,
                .event_strcpy = lttng_event_strcpy,
                .event_strcpy_from_user = lttng_event_strcpy_from_user,
-               .packet_avail_size = NULL,      /* Would be racy anyway */
-               .get_writer_buf_wait_queue = lttng_get_writer_buf_wait_queue,
-               .get_hp_wait_queue = lttng_get_hp_wait_queue,
-               .is_finalized = lttng_is_finalized,
-               .is_disabled = lttng_is_disabled,
-               .timestamp_begin = client_timestamp_begin,
-               .timestamp_end = client_timestamp_end,
-               .events_discarded = client_events_discarded,
-               .content_size = client_content_size,
-               .packet_size = client_packet_size,
-               .stream_id = client_stream_id,
-               .current_timestamp = client_current_timestamp,
-               .sequence_number = client_sequence_number,
-               .instance_id = client_instance_id,
+               .lost_event_too_big = lttng_channel_buffer_lost_event_too_big,
        },
 };