Fix: pass private data to context callbacks
[lttng-ust.git] / liblttng-ust-ctl / ustctl.c
index d1e7eb4ef6143b4c9f3478ee2252a6f4d0c312b4..a12e9dd377a008a308e2a9433ca5f370c7d49dd9 100644 (file)
@@ -30,6 +30,7 @@
 #include "../liblttng-ust/clock.h"
 #include "../liblttng-ust/getenv.h"
 #include "../liblttng-ust/lttng-tracer-core.h"
+#include "../liblttng-ust/lttng-counter-client.h"
 
 #include "../libcounter/shm.h"
 #include "../libcounter/smp.h"
@@ -45,7 +46,7 @@
  * Channel representation within consumer.
  */
 struct ustctl_consumer_channel {
-       struct lttng_channel *chan;             /* lttng channel buffers */
+       struct lttng_ust_channel_buffer *chan;  /* lttng channel buffers */
 
        /* initial attributes */
        struct ustctl_consumer_channel_attr attr;
@@ -57,7 +58,6 @@ struct ustctl_consumer_channel {
  * Stream representation within consumer.
  */
 struct ustctl_consumer_stream {
-       struct lttng_ust_shm_handle *handle;    /* shared-memory handle */
        struct lttng_ust_lib_ring_buffer *buf;
        struct ustctl_consumer_channel *chan;
        int shm_fd, wait_fd, wakeup_fd;
@@ -84,29 +84,6 @@ struct ustctl_daemon_counter {
        struct ustctl_counter_attr *attr;       /* initial attributes */
 };
 
-extern void lttng_ring_buffer_client_overwrite_init(void);
-extern void lttng_ring_buffer_client_overwrite_rt_init(void);
-extern void lttng_ring_buffer_client_discard_init(void);
-extern void lttng_ring_buffer_client_discard_rt_init(void);
-extern void lttng_ring_buffer_metadata_client_init(void);
-extern void lttng_ring_buffer_client_overwrite_exit(void);
-extern void lttng_ring_buffer_client_overwrite_rt_exit(void);
-extern void lttng_ring_buffer_client_discard_exit(void);
-extern void lttng_ring_buffer_client_discard_rt_exit(void);
-extern void lttng_ring_buffer_metadata_client_exit(void);
-
-__attribute__((visibility("hidden")))
-extern void lttng_counter_client_percpu_32_modular_init(void);
-
-__attribute__((visibility("hidden")))
-extern void lttng_counter_client_percpu_32_modular_exit(void);
-
-__attribute__((visibility("hidden")))
-extern void lttng_counter_client_percpu_64_modular_init(void);
-
-__attribute__((visibility("hidden")))
-extern void lttng_counter_client_percpu_64_modular_exit(void);
-
 int ustctl_release_handle(int sock, int handle)
 {
        struct ustcomm_ust_msg lum;
@@ -587,7 +564,7 @@ int ustctl_create_event_notifier(int sock, struct lttng_ust_abi_event_notifier *
                free(event_notifier_data);
                return ret;
        }
-       /* Send struct lttng_ust_event_notifier */
+       /* Send struct lttng_ust_abi_event_notifier */
        len = ustcomm_send_unix_sock(sock, event_notifier, sizeof(*event_notifier));
        if (len != sizeof(*event_notifier)) {
                free(event_notifier_data);
@@ -730,7 +707,8 @@ int ustctl_wait_quiescent(int sock)
        return 0;
 }
 
-int ustctl_calibrate(int sock, struct lttng_ust_abi_calibrate *calibrate)
+int ustctl_calibrate(int sock __attribute__((unused)),
+               struct lttng_ust_abi_calibrate *calibrate)
 {
        if (!calibrate)
                return -EINVAL;
@@ -1314,7 +1292,7 @@ int ustctl_send_channel_to_sessiond(int sock,
 {
        struct shm_object_table *table;
 
-       table = channel->chan->handle->table;
+       table = channel->chan->priv->rb_chan->handle->table;
        if (table->size <= 0)
                return -EINVAL;
        return ustctl_send_channel(sock,
@@ -1344,17 +1322,17 @@ int ustctl_write_metadata_to_channel(
                size_t len)                     /* metadata length */
 {
        struct lttng_ust_lib_ring_buffer_ctx ctx;
-       struct lttng_channel *chan = channel->chan;
+       struct lttng_ust_channel_buffer *lttng_chan_buf = channel->chan;
+       struct lttng_ust_lib_ring_buffer_channel *rb_chan = lttng_chan_buf->priv->rb_chan;
        const char *str = metadata_str;
        int ret = 0, waitret;
        size_t reserve_len, pos;
 
        for (pos = 0; pos < len; pos += reserve_len) {
                reserve_len = min_t(size_t,
-                               chan->ops->priv->packet_avail_size(chan->chan, chan->handle),
+                               lttng_chan_buf->ops->priv->packet_avail_size(lttng_chan_buf),
                                len - pos);
-               lib_ring_buffer_ctx_init(&ctx, chan->chan, NULL, reserve_len,
-                                        sizeof(char), -1, chan->handle);
+               lttng_ust_lib_ring_buffer_ctx_init(&ctx, rb_chan, reserve_len, sizeof(char), NULL);
                /*
                 * We don't care about metadata buffer's records lost
                 * count, because we always retry here. Report error if
@@ -1363,7 +1341,7 @@ int ustctl_write_metadata_to_channel(
                 */
                waitret = wait_cond_interruptible_timeout(
                        ({
-                               ret = chan->ops->event_reserve(&ctx, 0);
+                               ret = lttng_chan_buf->ops->event_reserve(&ctx);
                                ret != -ENOBUFS || !ret;
                        }),
                        LTTNG_METADATA_TIMEOUT_MSEC);
@@ -1375,8 +1353,8 @@ int ustctl_write_metadata_to_channel(
                                ret = waitret;
                        goto end;
                }
-               chan->ops->event_write(&ctx, &str[pos], reserve_len);
-               chan->ops->event_commit(&ctx);
+               lttng_chan_buf->ops->event_write(&ctx, &str[pos], reserve_len, 1);
+               lttng_chan_buf->ops->event_commit(&ctx);
        }
 end:
        return ret;
@@ -1392,25 +1370,25 @@ ssize_t ustctl_write_one_packet_to_channel(
                size_t len)                     /* metadata length */
 {
        struct lttng_ust_lib_ring_buffer_ctx ctx;
-       struct lttng_channel *chan = channel->chan;
+       struct lttng_ust_channel_buffer *lttng_chan_buf = channel->chan;
+       struct lttng_ust_lib_ring_buffer_channel *rb_chan = lttng_chan_buf->priv->rb_chan;
        const char *str = metadata_str;
        ssize_t reserve_len;
        int ret;
 
        reserve_len = min_t(ssize_t,
-                       chan->ops->priv->packet_avail_size(chan->chan, chan->handle),
+                       lttng_chan_buf->ops->priv->packet_avail_size(lttng_chan_buf),
                        len);
-       lib_ring_buffer_ctx_init(&ctx, chan->chan, NULL, reserve_len,
-                       sizeof(char), -1, chan->handle);
-       ret = chan->ops->event_reserve(&ctx, 0);
+       lttng_ust_lib_ring_buffer_ctx_init(&ctx, rb_chan, reserve_len, sizeof(char), NULL);
+       ret = lttng_chan_buf->ops->event_reserve(&ctx);
        if (ret != 0) {
                DBG("LTTng: event reservation failed");
                assert(ret < 0);
                reserve_len = ret;
                goto end;
        }
-       chan->ops->event_write(&ctx, str, reserve_len);
-       chan->ops->event_commit(&ctx);
+       lttng_chan_buf->ops->event_write(&ctx, str, reserve_len, 1);
+       lttng_chan_buf->ops->event_commit(&ctx);
 
 end:
        return reserve_len;
@@ -1421,7 +1399,7 @@ int ustctl_channel_close_wait_fd(struct ustctl_consumer_channel *consumer_chan)
        struct lttng_ust_lib_ring_buffer_channel *chan;
        int ret;
 
-       chan = consumer_chan->chan->chan;
+       chan = consumer_chan->chan->priv->rb_chan;
        ret = ring_buffer_channel_close_wait_fd(&chan->backend.config,
                        chan, chan->handle);
        if (!ret)
@@ -1434,7 +1412,7 @@ int ustctl_channel_close_wakeup_fd(struct ustctl_consumer_channel *consumer_chan
        struct lttng_ust_lib_ring_buffer_channel *chan;
        int ret;
 
-       chan = consumer_chan->chan->chan;
+       chan = consumer_chan->chan->priv->rb_chan;
        ret = ring_buffer_channel_close_wakeup_fd(&chan->backend.config,
                        chan, chan->handle);
        if (!ret)
@@ -1446,18 +1424,18 @@ int ustctl_stream_close_wait_fd(struct ustctl_consumer_stream *stream)
 {
        struct lttng_ust_lib_ring_buffer_channel *chan;
 
-       chan = stream->chan->chan->chan;
+       chan = stream->chan->chan->priv->rb_chan;
        return ring_buffer_stream_close_wait_fd(&chan->backend.config,
-                       chan, stream->handle, stream->cpu);
+                       chan, chan->handle, stream->cpu);
 }
 
 int ustctl_stream_close_wakeup_fd(struct ustctl_consumer_stream *stream)
 {
        struct lttng_ust_lib_ring_buffer_channel *chan;
 
-       chan = stream->chan->chan->chan;
+       chan = stream->chan->chan->priv->rb_chan;
        return ring_buffer_stream_close_wakeup_fd(&chan->backend.config,
-                       chan, stream->handle, stream->cpu);
+                       chan, chan->handle, stream->cpu);
 }
 
 struct ustctl_consumer_stream *
@@ -1466,7 +1444,7 @@ struct ustctl_consumer_stream *
 {
        struct ustctl_consumer_stream *stream;
        struct lttng_ust_shm_handle *handle;
-       struct lttng_ust_lib_ring_buffer_channel *chan;
+       struct lttng_ust_lib_ring_buffer_channel *rb_chan;
        int shm_fd, wait_fd, wakeup_fd;
        uint64_t memory_map_size;
        struct lttng_ust_lib_ring_buffer *buf;
@@ -1474,13 +1452,13 @@ struct ustctl_consumer_stream *
 
        if (!channel)
                return NULL;
-       handle = channel->chan->handle;
+       rb_chan = channel->chan->priv->rb_chan;
+       handle = rb_chan->handle;
        if (!handle)
                return NULL;
 
-       chan = channel->chan->chan;
-       buf = channel_get_ring_buffer(&chan->backend.config,
-               chan, cpu, handle, &shm_fd, &wait_fd,
+       buf = channel_get_ring_buffer(&rb_chan->backend.config,
+               rb_chan, cpu, handle, &shm_fd, &wait_fd,
                &wakeup_fd, &memory_map_size);
        if (!buf)
                return NULL;
@@ -1491,7 +1469,6 @@ struct ustctl_consumer_stream *
        stream = zmalloc(sizeof(*stream));
        if (!stream)
                goto alloc_error;
-       stream->handle = handle;
        stream->buf = buf;
        stream->chan = channel;
        stream->shm_fd = shm_fd;
@@ -1515,7 +1492,7 @@ void ustctl_destroy_stream(struct ustctl_consumer_stream *stream)
        consumer_chan = stream->chan;
        (void) ustctl_stream_close_wait_fd(stream);
        (void) ustctl_stream_close_wakeup_fd(stream);
-       lib_ring_buffer_release_read(buf, consumer_chan->chan->handle);
+       lib_ring_buffer_release_read(buf, consumer_chan->chan->priv->rb_chan->handle);
        free(stream);
 }
 
@@ -1523,16 +1500,16 @@ int ustctl_channel_get_wait_fd(struct ustctl_consumer_channel *chan)
 {
        if (!chan)
                return -EINVAL;
-       return shm_get_wait_fd(chan->chan->handle,
-               &chan->chan->handle->chan._ref);
+       return shm_get_wait_fd(chan->chan->priv->rb_chan->handle,
+               &chan->chan->priv->rb_chan->handle->chan._ref);
 }
 
 int ustctl_channel_get_wakeup_fd(struct ustctl_consumer_channel *chan)
 {
        if (!chan)
                return -EINVAL;
-       return shm_get_wakeup_fd(chan->chan->handle,
-               &chan->chan->handle->chan._ref);
+       return shm_get_wakeup_fd(chan->chan->priv->rb_chan->handle,
+               &chan->chan->priv->rb_chan->handle->chan._ref);
 }
 
 int ustctl_stream_get_wait_fd(struct ustctl_consumer_stream *stream)
@@ -1544,7 +1521,7 @@ int ustctl_stream_get_wait_fd(struct ustctl_consumer_stream *stream)
                return -EINVAL;
        buf = stream->buf;
        consumer_chan = stream->chan;
-       return shm_get_wait_fd(consumer_chan->chan->handle, &buf->self._ref);
+       return shm_get_wait_fd(consumer_chan->chan->priv->rb_chan->handle, &buf->self._ref);
 }
 
 int ustctl_stream_get_wakeup_fd(struct ustctl_consumer_stream *stream)
@@ -1556,7 +1533,7 @@ int ustctl_stream_get_wakeup_fd(struct ustctl_consumer_stream *stream)
                return -EINVAL;
        buf = stream->buf;
        consumer_chan = stream->chan;
-       return shm_get_wakeup_fd(consumer_chan->chan->handle, &buf->self._ref);
+       return shm_get_wakeup_fd(consumer_chan->chan->priv->rb_chan->handle, &buf->self._ref);
 }
 
 /* For mmap mode, readable without "get" operation */
@@ -1570,7 +1547,7 @@ void *ustctl_get_mmap_base(struct ustctl_consumer_stream *stream)
                return NULL;
        buf = stream->buf;
        consumer_chan = stream->chan;
-       return shmp(consumer_chan->chan->handle, buf->backend.memory_map);
+       return shmp(consumer_chan->chan->priv->rb_chan->handle, buf->backend.memory_map);
 }
 
 /* returns the length to mmap. */
@@ -1579,17 +1556,17 @@ int ustctl_get_mmap_len(struct ustctl_consumer_stream *stream,
 {
        struct ustctl_consumer_channel *consumer_chan;
        unsigned long mmap_buf_len;
-       struct lttng_ust_lib_ring_buffer_channel *chan;
+       struct lttng_ust_lib_ring_buffer_channel *rb_chan;
 
        if (!stream)
                return -EINVAL;
        consumer_chan = stream->chan;
-       chan = consumer_chan->chan->chan;
-       if (chan->backend.config.output != RING_BUFFER_MMAP)
+       rb_chan = consumer_chan->chan->priv->rb_chan;
+       if (rb_chan->backend.config.output != RING_BUFFER_MMAP)
                return -EINVAL;
-       mmap_buf_len = chan->backend.buf_size;
-       if (chan->backend.extra_reader_sb)
-               mmap_buf_len += chan->backend.subbuf_size;
+       mmap_buf_len = rb_chan->backend.buf_size;
+       if (rb_chan->backend.extra_reader_sb)
+               mmap_buf_len += rb_chan->backend.subbuf_size;
        if (mmap_buf_len > INT_MAX)
                return -EFBIG;
        *len = mmap_buf_len;
@@ -1601,13 +1578,13 @@ int ustctl_get_max_subbuf_size(struct ustctl_consumer_stream *stream,
                unsigned long *len)
 {
        struct ustctl_consumer_channel *consumer_chan;
-       struct lttng_ust_lib_ring_buffer_channel *chan;
+       struct lttng_ust_lib_ring_buffer_channel *rb_chan;
 
        if (!stream)
                return -EINVAL;
        consumer_chan = stream->chan;
-       chan = consumer_chan->chan->chan;
-       *len = chan->backend.subbuf_size;
+       rb_chan = consumer_chan->chan->priv->rb_chan;
+       *len = rb_chan->backend.subbuf_size;
        return 0;
 }
 
@@ -1620,7 +1597,7 @@ int ustctl_get_max_subbuf_size(struct ustctl_consumer_stream *stream,
 int ustctl_get_mmap_read_offset(struct ustctl_consumer_stream *stream,
                unsigned long *off)
 {
-       struct lttng_ust_lib_ring_buffer_channel *chan;
+       struct lttng_ust_lib_ring_buffer_channel *rb_chan;
        unsigned long sb_bindex;
        struct lttng_ust_lib_ring_buffer *buf;
        struct ustctl_consumer_channel *consumer_chan;
@@ -1631,16 +1608,16 @@ int ustctl_get_mmap_read_offset(struct ustctl_consumer_stream *stream,
                return -EINVAL;
        buf = stream->buf;
        consumer_chan = stream->chan;
-       chan = consumer_chan->chan->chan;
-       if (chan->backend.config.output != RING_BUFFER_MMAP)
+       rb_chan = consumer_chan->chan->priv->rb_chan;
+       if (rb_chan->backend.config.output != RING_BUFFER_MMAP)
                return -EINVAL;
-       sb_bindex = subbuffer_id_get_index(&chan->backend.config,
+       sb_bindex = subbuffer_id_get_index(&rb_chan->backend.config,
                                        buf->backend.buf_rsb.id);
-       barray_idx = shmp_index(consumer_chan->chan->handle, buf->backend.array,
+       barray_idx = shmp_index(rb_chan->handle, buf->backend.array,
                        sb_bindex);
        if (!barray_idx)
                return -EINVAL;
-       pages = shmp(consumer_chan->chan->handle, barray_idx->shmp);
+       pages = shmp(rb_chan->handle, barray_idx->shmp);
        if (!pages)
                return -EINVAL;
        *off = pages->mmap_offset;
@@ -1652,7 +1629,7 @@ int ustctl_get_subbuf_size(struct ustctl_consumer_stream *stream,
                unsigned long *len)
 {
        struct ustctl_consumer_channel *consumer_chan;
-       struct lttng_ust_lib_ring_buffer_channel *chan;
+       struct lttng_ust_lib_ring_buffer_channel *rb_chan;
        struct lttng_ust_lib_ring_buffer *buf;
 
        if (!stream)
@@ -1660,9 +1637,9 @@ int ustctl_get_subbuf_size(struct ustctl_consumer_stream *stream,
 
        buf = stream->buf;
        consumer_chan = stream->chan;
-       chan = consumer_chan->chan->chan;
-       *len = lib_ring_buffer_get_read_data_size(&chan->backend.config, buf,
-               consumer_chan->chan->handle);
+       rb_chan = consumer_chan->chan->priv->rb_chan;
+       *len = lib_ring_buffer_get_read_data_size(&rb_chan->backend.config, buf,
+               rb_chan->handle);
        return 0;
 }
 
@@ -1671,16 +1648,16 @@ int ustctl_get_padded_subbuf_size(struct ustctl_consumer_stream *stream,
                unsigned long *len)
 {
        struct ustctl_consumer_channel *consumer_chan;
-       struct lttng_ust_lib_ring_buffer_channel *chan;
+       struct lttng_ust_lib_ring_buffer_channel *rb_chan;
        struct lttng_ust_lib_ring_buffer *buf;
 
        if (!stream)
                return -EINVAL;
        buf = stream->buf;
        consumer_chan = stream->chan;
-       chan = consumer_chan->chan->chan;
-       *len = lib_ring_buffer_get_read_data_size(&chan->backend.config, buf,
-               consumer_chan->chan->handle);
+       rb_chan = consumer_chan->chan->priv->rb_chan;
+       *len = lib_ring_buffer_get_read_data_size(&rb_chan->backend.config, buf,
+               rb_chan->handle);
        *len = LTTNG_UST_PAGE_ALIGN(*len);
        return 0;
 }
@@ -1696,7 +1673,7 @@ int ustctl_get_next_subbuf(struct ustctl_consumer_stream *stream)
        buf = stream->buf;
        consumer_chan = stream->chan;
        return lib_ring_buffer_get_next_subbuf(buf,
-                       consumer_chan->chan->handle);
+                       consumer_chan->chan->priv->rb_chan->handle);
 }
 
 
@@ -1710,7 +1687,7 @@ int ustctl_put_next_subbuf(struct ustctl_consumer_stream *stream)
                return -EINVAL;
        buf = stream->buf;
        consumer_chan = stream->chan;
-       lib_ring_buffer_put_next_subbuf(buf, consumer_chan->chan->handle);
+       lib_ring_buffer_put_next_subbuf(buf, consumer_chan->chan->priv->rb_chan->handle);
        return 0;
 }
 
@@ -1727,7 +1704,7 @@ int ustctl_snapshot(struct ustctl_consumer_stream *stream)
        buf = stream->buf;
        consumer_chan = stream->chan;
        return lib_ring_buffer_snapshot(buf, &buf->cons_snapshot,
-                       &buf->prod_snapshot, consumer_chan->chan->handle);
+                       &buf->prod_snapshot, consumer_chan->chan->priv->rb_chan->handle);
 }
 
 /*
@@ -1746,7 +1723,7 @@ int ustctl_snapshot_sample_positions(struct ustctl_consumer_stream *stream)
        consumer_chan = stream->chan;
        return lib_ring_buffer_snapshot_sample_positions(buf,
                        &buf->cons_snapshot, &buf->prod_snapshot,
-                       consumer_chan->chan->handle);
+                       consumer_chan->chan->priv->rb_chan->handle);
 }
 
 /* Get the consumer position (iteration start) */
@@ -1787,7 +1764,7 @@ int ustctl_get_subbuf(struct ustctl_consumer_stream *stream,
        buf = stream->buf;
        consumer_chan = stream->chan;
        return lib_ring_buffer_get_subbuf(buf, *pos,
-                       consumer_chan->chan->handle);
+                       consumer_chan->chan->priv->rb_chan->handle);
 }
 
 /* Release exclusive sub-buffer access */
@@ -1800,7 +1777,7 @@ int ustctl_put_subbuf(struct ustctl_consumer_stream *stream)
                return -EINVAL;
        buf = stream->buf;
        consumer_chan = stream->chan;
-       lib_ring_buffer_put_subbuf(buf, consumer_chan->chan->handle);
+       lib_ring_buffer_put_subbuf(buf, consumer_chan->chan->priv->rb_chan->handle);
        return 0;
 }
 
@@ -1815,7 +1792,7 @@ void ustctl_flush_buffer(struct ustctl_consumer_stream *stream,
        consumer_chan = stream->chan;
        lib_ring_buffer_switch_slow(buf,
                producer_active ? SWITCH_ACTIVE : SWITCH_FLUSH,
-               consumer_chan->chan->handle);
+               consumer_chan->chan->priv->rb_chan->handle);
 }
 
 void ustctl_clear_buffer(struct ustctl_consumer_stream *stream)
@@ -1827,22 +1804,18 @@ void ustctl_clear_buffer(struct ustctl_consumer_stream *stream)
        buf = stream->buf;
        consumer_chan = stream->chan;
        lib_ring_buffer_switch_slow(buf, SWITCH_ACTIVE,
-               consumer_chan->chan->handle);
-       lib_ring_buffer_clear_reader(buf, consumer_chan->chan->handle);
+               consumer_chan->chan->priv->rb_chan->handle);
+       lib_ring_buffer_clear_reader(buf, consumer_chan->chan->priv->rb_chan->handle);
 }
 
 static
 struct lttng_ust_client_lib_ring_buffer_client_cb *get_client_cb(
-               struct lttng_ust_lib_ring_buffer *buf,
-               struct lttng_ust_shm_handle *handle)
+               struct lttng_ust_lib_ring_buffer *buf __attribute__((unused)),
+               struct lttng_ust_lib_ring_buffer_channel *chan)
 {
-       struct lttng_ust_lib_ring_buffer_channel *chan;
        const struct lttng_ust_lib_ring_buffer_config *config;
        struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb;
 
-       chan = shmp(handle, buf->backend.chan);
-       if (!chan)
-               return NULL;
        config = &chan->backend.config;
        if (!config->cb_ptr)
                return NULL;
@@ -1856,156 +1829,156 @@ int ustctl_get_timestamp_begin(struct ustctl_consumer_stream *stream,
                uint64_t *timestamp_begin)
 {
        struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb;
+       struct lttng_ust_lib_ring_buffer_channel *chan;
        struct lttng_ust_lib_ring_buffer *buf;
-       struct lttng_ust_shm_handle *handle;
 
        if (!stream || !timestamp_begin)
                return -EINVAL;
        buf = stream->buf;
-       handle = stream->chan->chan->handle;
-       client_cb = get_client_cb(buf, handle);
+       chan = stream->chan->chan->priv->rb_chan;
+       client_cb = get_client_cb(buf, chan);
        if (!client_cb)
                return -ENOSYS;
-       return client_cb->timestamp_begin(buf, handle, timestamp_begin);
+       return client_cb->timestamp_begin(buf, chan, timestamp_begin);
 }
 
 int ustctl_get_timestamp_end(struct ustctl_consumer_stream *stream,
        uint64_t *timestamp_end)
 {
        struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb;
+       struct lttng_ust_lib_ring_buffer_channel *chan;
        struct lttng_ust_lib_ring_buffer *buf;
-       struct lttng_ust_shm_handle *handle;
 
        if (!stream || !timestamp_end)
                return -EINVAL;
        buf = stream->buf;
-       handle = stream->chan->chan->handle;
-       client_cb = get_client_cb(buf, handle);
+       chan = stream->chan->chan->priv->rb_chan;
+       client_cb = get_client_cb(buf, chan);
        if (!client_cb)
                return -ENOSYS;
-       return client_cb->timestamp_end(buf, handle, timestamp_end);
+       return client_cb->timestamp_end(buf, chan, timestamp_end);
 }
 
 int ustctl_get_events_discarded(struct ustctl_consumer_stream *stream,
        uint64_t *events_discarded)
 {
        struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb;
+       struct lttng_ust_lib_ring_buffer_channel *chan;
        struct lttng_ust_lib_ring_buffer *buf;
-       struct lttng_ust_shm_handle *handle;
 
        if (!stream || !events_discarded)
                return -EINVAL;
        buf = stream->buf;
-       handle = stream->chan->chan->handle;
-       client_cb = get_client_cb(buf, handle);
+       chan = stream->chan->chan->priv->rb_chan;
+       client_cb = get_client_cb(buf, chan);
        if (!client_cb)
                return -ENOSYS;
-       return client_cb->events_discarded(buf, handle, events_discarded);
+       return client_cb->events_discarded(buf, chan, events_discarded);
 }
 
 int ustctl_get_content_size(struct ustctl_consumer_stream *stream,
        uint64_t *content_size)
 {
        struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb;
+       struct lttng_ust_lib_ring_buffer_channel *chan;
        struct lttng_ust_lib_ring_buffer *buf;
-       struct lttng_ust_shm_handle *handle;
 
        if (!stream || !content_size)
                return -EINVAL;
        buf = stream->buf;
-       handle = stream->chan->chan->handle;
-       client_cb = get_client_cb(buf, handle);
+       chan = stream->chan->chan->priv->rb_chan;
+       client_cb = get_client_cb(buf, chan);
        if (!client_cb)
                return -ENOSYS;
-       return client_cb->content_size(buf, handle, content_size);
+       return client_cb->content_size(buf, chan, content_size);
 }
 
 int ustctl_get_packet_size(struct ustctl_consumer_stream *stream,
        uint64_t *packet_size)
 {
        struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb;
+       struct lttng_ust_lib_ring_buffer_channel *chan;
        struct lttng_ust_lib_ring_buffer *buf;
-       struct lttng_ust_shm_handle *handle;
 
        if (!stream || !packet_size)
                return -EINVAL;
        buf = stream->buf;
-       handle = stream->chan->chan->handle;
-       client_cb = get_client_cb(buf, handle);
+       chan = stream->chan->chan->priv->rb_chan;
+       client_cb = get_client_cb(buf, chan);
        if (!client_cb)
                return -ENOSYS;
-       return client_cb->packet_size(buf, handle, packet_size);
+       return client_cb->packet_size(buf, chan, packet_size);
 }
 
 int ustctl_get_stream_id(struct ustctl_consumer_stream *stream,
                uint64_t *stream_id)
 {
        struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb;
+       struct lttng_ust_lib_ring_buffer_channel *chan;
        struct lttng_ust_lib_ring_buffer *buf;
-       struct lttng_ust_shm_handle *handle;
 
        if (!stream || !stream_id)
                return -EINVAL;
        buf = stream->buf;
-       handle = stream->chan->chan->handle;
-       client_cb = get_client_cb(buf, handle);
+       chan = stream->chan->chan->priv->rb_chan;
+       client_cb = get_client_cb(buf, chan);
        if (!client_cb)
                return -ENOSYS;
-       return client_cb->stream_id(buf, handle, stream_id);
+       return client_cb->stream_id(buf, chan, stream_id);
 }
 
 int ustctl_get_current_timestamp(struct ustctl_consumer_stream *stream,
                uint64_t *ts)
 {
        struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb;
+       struct lttng_ust_lib_ring_buffer_channel *chan;
        struct lttng_ust_lib_ring_buffer *buf;
-       struct lttng_ust_shm_handle *handle;
 
        if (!stream || !ts)
                return -EINVAL;
        buf = stream->buf;
-       handle = stream->chan->chan->handle;
-       client_cb = get_client_cb(buf, handle);
+       chan = stream->chan->chan->priv->rb_chan;
+       client_cb = get_client_cb(buf, chan);
        if (!client_cb || !client_cb->current_timestamp)
                return -ENOSYS;
-       return client_cb->current_timestamp(buf, handle, ts);
+       return client_cb->current_timestamp(buf, chan, ts);
 }
 
 int ustctl_get_sequence_number(struct ustctl_consumer_stream *stream,
                uint64_t *seq)
 {
        struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb;
+       struct lttng_ust_lib_ring_buffer_channel *chan;
        struct lttng_ust_lib_ring_buffer *buf;
-       struct lttng_ust_shm_handle *handle;
 
        if (!stream || !seq)
                return -EINVAL;
        buf = stream->buf;
-       handle = stream->chan->chan->handle;
-       client_cb = get_client_cb(buf, handle);
+       chan = stream->chan->chan->priv->rb_chan;
+       client_cb = get_client_cb(buf, chan);
        if (!client_cb || !client_cb->sequence_number)
                return -ENOSYS;
-       return client_cb->sequence_number(buf, handle, seq);
+       return client_cb->sequence_number(buf, chan, seq);
 }
 
 int ustctl_get_instance_id(struct ustctl_consumer_stream *stream,
                uint64_t *id)
 {
        struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb;
+       struct lttng_ust_lib_ring_buffer_channel *chan;
        struct lttng_ust_lib_ring_buffer *buf;
-       struct lttng_ust_shm_handle *handle;
 
        if (!stream || !id)
                return -EINVAL;
        buf = stream->buf;
-       handle = stream->chan->chan->handle;
-       client_cb = get_client_cb(buf, handle);
+       chan = stream->chan->chan->priv->rb_chan;
+       client_cb = get_client_cb(buf, chan);
        if (!client_cb)
                return -ENOSYS;
-       return client_cb->instance_id(buf, handle, id);
+       return client_cb->instance_id(buf, chan, id);
 }
 
-#ifdef HAVE_PERF_EVENT
+#ifdef HAVE_LINUX_PERF_EVENT_H
 
 int ustctl_has_perf_counters(void)
 {
@@ -2928,30 +2901,26 @@ int ustctl_counter_clear(struct ustctl_daemon_counter *counter,
        return counter->ops->counter_clear(counter->counter, dimension_indexes);
 }
 
-static __attribute__((constructor))
+static
+void ustctl_init(void)
+       __attribute__((constructor));
+static
 void ustctl_init(void)
 {
        ust_err_init();
        lttng_ust_getenv_init();        /* Needs ust_err_init() to be completed. */
        lttng_ust_clock_init();
-       lttng_ring_buffer_metadata_client_init();
-       lttng_ring_buffer_client_overwrite_init();
-       lttng_ring_buffer_client_overwrite_rt_init();
-       lttng_ring_buffer_client_discard_init();
-       lttng_ring_buffer_client_discard_rt_init();
-       lttng_counter_client_percpu_32_modular_init();
-       lttng_counter_client_percpu_64_modular_init();
+       lttng_ust_ring_buffer_clients_init();
+       lttng_ust_counter_clients_init();
        lib_ringbuffer_signal_init();
 }
 
-static __attribute__((destructor))
+static
+void ustctl_exit(void)
+       __attribute__((destructor));
+static
 void ustctl_exit(void)
 {
-       lttng_ring_buffer_client_discard_rt_exit();
-       lttng_ring_buffer_client_discard_exit();
-       lttng_ring_buffer_client_overwrite_rt_exit();
-       lttng_ring_buffer_client_overwrite_exit();
-       lttng_ring_buffer_metadata_client_exit();
-       lttng_counter_client_percpu_32_modular_exit();
-       lttng_counter_client_percpu_64_modular_exit();
+       lttng_ust_counter_clients_exit();
+       lttng_ust_ring_buffer_clients_exit();
 }
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