/*
- * Copyright (C) 2011 - Julien Desfossez <julien.desfossez@polymtl.ca>
- * Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ * SPDX-License-Identifier: GPL-2.0-only
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; version 2 of the License only.
- *
- * This program 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 General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ * Copyright (C) 2011 Julien Desfossez <julien.desfossez@polymtl.ca>
+ * Copyright (C) 2011-2013 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
*/
-#define _GNU_SOURCE
+#include <stdint.h>
#include <string.h>
+#include <sys/mman.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+
+#include <lttng/ust-config.h>
#include <lttng/ust-ctl.h>
#include <lttng/ust-abi.h>
#include <lttng/ust-events.h>
-#include <sys/mman.h>
-
+#include <lttng/ust-endian.h>
#include <usterr-signal-safe.h>
#include <ust-comm.h>
+#include <helper.h>
#include "../libringbuffer/backend.h"
#include "../libringbuffer/frontend.h"
+#include "../liblttng-ust/wait.h"
+#include "../liblttng-ust/lttng-rb-clients.h"
+#include "../liblttng-ust/clock.h"
+#include "../liblttng-ust/getenv.h"
+#include "../liblttng-ust/lttng-tracer-core.h"
-volatile enum ust_loglevel ust_loglevel;
+#include "../libcounter/shm.h"
+#include "../libcounter/smp.h"
+#include "../libcounter/counter.h"
-static
-void init_object(struct lttng_ust_object_data *data)
-{
- data->handle = -1;
- data->shm_fd = -1;
- data->wait_fd = -1;
- data->memory_map_size = 0;
-}
+/*
+ * Number of milliseconds to retry before failing metadata writes on
+ * buffer full condition. (10 seconds)
+ */
+#define LTTNG_METADATA_TIMEOUT_MSEC 10000
+
+/*
+ * Channel representation within consumer.
+ */
+struct ustctl_consumer_channel {
+ struct lttng_channel *chan; /* lttng channel buffers */
+
+ /* initial attributes */
+ struct ustctl_consumer_channel_attr attr;
+ int wait_fd; /* monitor close() */
+ int wakeup_fd; /* monitor close() */
+};
+
+/*
+ * 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;
+ int cpu;
+ uint64_t memory_map_size;
+};
+
+#define USTCTL_COUNTER_ATTR_DIMENSION_MAX 8
+struct ustctl_counter_attr {
+ enum ustctl_counter_arithmetic arithmetic;
+ enum ustctl_counter_bitness bitness;
+ uint32_t nr_dimensions;
+ int64_t global_sum_step;
+ struct ustctl_counter_dimension dimensions[USTCTL_COUNTER_ATTR_DIMENSION_MAX];
+};
+
+/*
+ * Counter representation within daemon.
+ */
+struct ustctl_daemon_counter {
+ struct lib_counter *counter;
+ const struct lttng_counter_ops *ops;
+ 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);
+LTTNG_HIDDEN
+extern void lttng_counter_client_percpu_32_modular_init(void);
+LTTNG_HIDDEN
+extern void lttng_counter_client_percpu_32_modular_exit(void);
+LTTNG_HIDDEN
+extern void lttng_counter_client_percpu_64_modular_init(void);
+LTTNG_HIDDEN
+extern void lttng_counter_client_percpu_64_modular_exit(void);
int ustctl_release_handle(int sock, int handle)
{
struct ustcomm_ust_msg lum;
struct ustcomm_ust_reply lur;
- int ret;
- if (sock >= 0) {
- memset(&lum, 0, sizeof(lum));
- lum.handle = handle;
- lum.cmd = LTTNG_UST_RELEASE;
- ret = ustcomm_send_app_cmd(sock, &lum, &lur);
- if (ret)
- return ret;
- }
- return 0;
+ if (sock < 0 || handle < 0)
+ return 0;
+ memset(&lum, 0, sizeof(lum));
+ lum.handle = handle;
+ lum.cmd = LTTNG_UST_RELEASE;
+ return ustcomm_send_app_cmd(sock, &lum, &lur);
}
+
/*
* If sock is negative, it means we don't have to notify the other side
* (e.g. application has already vanished).
if (!data)
return -EINVAL;
- if (data->shm_fd >= 0) {
- ret = close(data->shm_fd);
- if (ret < 0) {
- ret = -errno;
- return ret;
+ switch (data->type) {
+ case LTTNG_UST_OBJECT_TYPE_CHANNEL:
+ if (data->u.channel.wakeup_fd >= 0) {
+ ret = close(data->u.channel.wakeup_fd);
+ if (ret < 0) {
+ ret = -errno;
+ return ret;
+ }
+ data->u.channel.wakeup_fd = -1;
}
- }
- if (data->wait_fd >= 0) {
- ret = close(data->wait_fd);
- if (ret < 0) {
- ret = -errno;
- return ret;
+ free(data->u.channel.data);
+ data->u.channel.data = NULL;
+ break;
+ case LTTNG_UST_OBJECT_TYPE_STREAM:
+ if (data->u.stream.shm_fd >= 0) {
+ ret = close(data->u.stream.shm_fd);
+ if (ret < 0) {
+ ret = -errno;
+ return ret;
+ }
+ data->u.stream.shm_fd = -1;
+ }
+ if (data->u.stream.wakeup_fd >= 0) {
+ ret = close(data->u.stream.wakeup_fd);
+ if (ret < 0) {
+ ret = -errno;
+ return ret;
+ }
+ data->u.stream.wakeup_fd = -1;
}
+ break;
+ case LTTNG_UST_OBJECT_TYPE_EVENT:
+ case LTTNG_UST_OBJECT_TYPE_CONTEXT:
+ case LTTNG_UST_OBJECT_TYPE_EVENT_NOTIFIER_GROUP:
+ case LTTNG_UST_OBJECT_TYPE_EVENT_NOTIFIER:
+ break;
+ case LTTNG_UST_OBJECT_TYPE_COUNTER:
+ free(data->u.counter.data);
+ data->u.counter.data = NULL;
+ break;
+ case LTTNG_UST_OBJECT_TYPE_COUNTER_GLOBAL:
+ if (data->u.counter_global.shm_fd >= 0) {
+ ret = close(data->u.counter_global.shm_fd);
+ if (ret < 0) {
+ ret = -errno;
+ return ret;
+ }
+ data->u.counter_global.shm_fd = -1;
+ }
+ break;
+ case LTTNG_UST_OBJECT_TYPE_COUNTER_CPU:
+ if (data->u.counter_cpu.shm_fd >= 0) {
+ ret = close(data->u.counter_cpu.shm_fd);
+ if (ret < 0) {
+ ret = -errno;
+ return ret;
+ }
+ data->u.counter_cpu.shm_fd = -1;
+ }
+ break;
+ default:
+ assert(0);
}
return ustctl_release_handle(sock, data->handle);
}
return session_handle;
}
-/* open the metadata global channel */
-int ustctl_open_metadata(int sock, int session_handle,
- struct lttng_ust_channel_attr *chops,
- struct lttng_ust_object_data **_metadata_data)
-{
- struct ustcomm_ust_msg lum;
- struct ustcomm_ust_reply lur;
- struct lttng_ust_object_data *metadata_data;
- int ret, err = 0;
-
- if (!chops || !_metadata_data)
- return -EINVAL;
-
- metadata_data = malloc(sizeof(*metadata_data));
- if (!metadata_data)
- return -ENOMEM;
- init_object(metadata_data);
- /* Create metadata channel */
- memset(&lum, 0, sizeof(lum));
- lum.handle = session_handle;
- lum.cmd = LTTNG_UST_METADATA;
- lum.u.channel.overwrite = chops->overwrite;
- lum.u.channel.subbuf_size = chops->subbuf_size;
- lum.u.channel.num_subbuf = chops->num_subbuf;
- lum.u.channel.switch_timer_interval = chops->switch_timer_interval;
- lum.u.channel.read_timer_interval = chops->read_timer_interval;
- lum.u.channel.output = chops->output;
- ret = ustcomm_send_app_cmd(sock, &lum, &lur);
- if (ret) {
- free(metadata_data);
- return ret;
- }
- metadata_data->handle = lur.ret_val;
- DBG("received metadata handle %u", metadata_data->handle);
- metadata_data->memory_map_size = lur.u.channel.memory_map_size;
- /* get shm fd */
- ret = ustcomm_recv_fd(sock);
- if (ret < 0)
- err = ret;
- else
- metadata_data->shm_fd = ret;
- /*
- * We need to get the second FD even if the first fails, because
- * libust expects us to read the two FDs.
- */
- /* get wait fd */
- ret = ustcomm_recv_fd(sock);
- if (ret < 0)
- err = ret;
- else
- metadata_data->wait_fd = ret;
- if (err)
- goto error;
- *_metadata_data = metadata_data;
- return 0;
-
-error:
- (void) ustctl_release_object(sock, metadata_data);
- free(metadata_data);
- return err;
-}
-
-int ustctl_create_channel(int sock, int session_handle,
- struct lttng_ust_channel_attr *chops,
- struct lttng_ust_object_data **_channel_data)
-{
- struct ustcomm_ust_msg lum;
- struct ustcomm_ust_reply lur;
- struct lttng_ust_object_data *channel_data;
- int ret, err = 0;
-
- if (!chops || !_channel_data)
- return -EINVAL;
-
- channel_data = malloc(sizeof(*channel_data));
- if (!channel_data)
- return -ENOMEM;
- init_object(channel_data);
- /* Create metadata channel */
- memset(&lum, 0, sizeof(lum));
- lum.handle = session_handle;
- lum.cmd = LTTNG_UST_CHANNEL;
- lum.u.channel.overwrite = chops->overwrite;
- lum.u.channel.subbuf_size = chops->subbuf_size;
- lum.u.channel.num_subbuf = chops->num_subbuf;
- lum.u.channel.switch_timer_interval = chops->switch_timer_interval;
- lum.u.channel.read_timer_interval = chops->read_timer_interval;
- lum.u.channel.output = chops->output;
- ret = ustcomm_send_app_cmd(sock, &lum, &lur);
- if (ret) {
- free(channel_data);
- return ret;
- }
- channel_data->handle = lur.ret_val;
- DBG("received channel handle %u", channel_data->handle);
- channel_data->memory_map_size = lur.u.channel.memory_map_size;
- /* get shm fd */
- ret = ustcomm_recv_fd(sock);
- if (ret < 0)
- err = ret;
- else
- channel_data->shm_fd = ret;
- /*
- * We need to get the second FD even if the first fails, because
- * libust expects us to read the two FDs.
- */
- /* get wait fd */
- ret = ustcomm_recv_fd(sock);
- if (ret < 0)
- err = ret;
- else
- channel_data->wait_fd = ret;
- if (err)
- goto error;
- *_channel_data = channel_data;
- return 0;
-
-error:
- (void) ustctl_release_object(sock, channel_data);
- free(channel_data);
- return err;
-}
-
-/*
- * Return -LTTNG_UST_ERR_NOENT if no more stream is available for creation.
- * Return 0 on success.
- * Return negative error value on system error.
- * Return positive error value on UST error.
- */
-int ustctl_create_stream(int sock, struct lttng_ust_object_data *channel_data,
- struct lttng_ust_object_data **_stream_data)
-{
- struct ustcomm_ust_msg lum;
- struct ustcomm_ust_reply lur;
- struct lttng_ust_object_data *stream_data;
- int ret, fd, err = 0;
-
- if (!channel_data || !_stream_data)
- return -EINVAL;
-
- stream_data = malloc(sizeof(*stream_data));
- if (!stream_data)
- return -ENOMEM;
- init_object(stream_data);
- memset(&lum, 0, sizeof(lum));
- lum.handle = channel_data->handle;
- lum.cmd = LTTNG_UST_STREAM;
- ret = ustcomm_send_app_cmd(sock, &lum, &lur);
- if (ret) {
- free(stream_data);
- return ret;
- }
- stream_data->handle = lur.ret_val;
- DBG("received stream handle %u", stream_data->handle);
- stream_data->memory_map_size = lur.u.stream.memory_map_size;
- /* get shm fd */
- fd = ustcomm_recv_fd(sock);
- if (fd < 0)
- err = fd;
- else
- stream_data->shm_fd = fd;
- /*
- * We need to get the second FD even if the first fails, because
- * libust expects us to read the two FDs.
- */
- /* get wait fd */
- fd = ustcomm_recv_fd(sock);
- if (fd < 0)
- err = fd;
- else
- stream_data->wait_fd = fd;
- if (err)
- goto error;
- *_stream_data = stream_data;
- return ret;
-
-error:
- (void) ustctl_release_object(sock, stream_data);
- free(stream_data);
- return err;
-}
-
int ustctl_create_event(int sock, struct lttng_ust_event *ev,
struct lttng_ust_object_data *channel_data,
struct lttng_ust_object_data **_event_data)
if (!channel_data || !_event_data)
return -EINVAL;
- event_data = malloc(sizeof(*event_data));
+ event_data = zmalloc(sizeof(*event_data));
if (!event_data)
return -ENOMEM;
- init_object(event_data);
+ event_data->type = LTTNG_UST_OBJECT_TYPE_EVENT;
memset(&lum, 0, sizeof(lum));
lum.handle = channel_data->handle;
lum.cmd = LTTNG_UST_EVENT;
return 0;
}
-int ustctl_add_context(int sock, struct lttng_ust_context *ctx,
+int ustctl_add_context(int sock, struct lttng_ust_context_attr *ctx,
struct lttng_ust_object_data *obj_data,
struct lttng_ust_object_data **_context_data)
{
struct ustcomm_ust_msg lum;
struct ustcomm_ust_reply lur;
- struct lttng_ust_object_data *context_data;
+ struct lttng_ust_object_data *context_data = NULL;
+ char *buf = NULL;
+ size_t len;
int ret;
- if (!obj_data || !_context_data)
- return -EINVAL;
+ if (!obj_data || !_context_data) {
+ ret = -EINVAL;
+ goto end;
+ }
- context_data = malloc(sizeof(*context_data));
- if (!context_data)
- return -ENOMEM;
- init_object(context_data);
+ context_data = zmalloc(sizeof(*context_data));
+ if (!context_data) {
+ ret = -ENOMEM;
+ goto end;
+ }
+ context_data->type = LTTNG_UST_OBJECT_TYPE_CONTEXT;
memset(&lum, 0, sizeof(lum));
lum.handle = obj_data->handle;
lum.cmd = LTTNG_UST_CONTEXT;
+
lum.u.context.ctx = ctx->ctx;
- ret = ustcomm_send_app_cmd(sock, &lum, &lur);
- if (ret) {
- free(context_data);
- return ret;
+ switch (ctx->ctx) {
+ case LTTNG_UST_CONTEXT_PERF_THREAD_COUNTER:
+ lum.u.context.u.perf_counter = ctx->u.perf_counter;
+ break;
+ case LTTNG_UST_CONTEXT_APP_CONTEXT:
+ {
+ size_t provider_name_len = strlen(
+ ctx->u.app_ctx.provider_name) + 1;
+ size_t ctx_name_len = strlen(ctx->u.app_ctx.ctx_name) + 1;
+
+ lum.u.context.u.app_ctx.provider_name_len = provider_name_len;
+ lum.u.context.u.app_ctx.ctx_name_len = ctx_name_len;
+
+ len = provider_name_len + ctx_name_len;
+ buf = zmalloc(len);
+ if (!buf) {
+ ret = -ENOMEM;
+ goto end;
+ }
+ memcpy(buf, ctx->u.app_ctx.provider_name,
+ provider_name_len);
+ memcpy(buf + provider_name_len, ctx->u.app_ctx.ctx_name,
+ ctx_name_len);
+ break;
+ }
+ default:
+ break;
+ }
+ ret = ustcomm_send_app_msg(sock, &lum);
+ if (ret)
+ goto end;
+ if (buf) {
+ /* send var len ctx_name */
+ ret = ustcomm_send_unix_sock(sock, buf, len);
+ if (ret < 0) {
+ goto end;
+ }
+ if (ret != len) {
+ ret = -EINVAL;
+ goto end;
+ }
+ }
+ ret = ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd);
+ if (ret < 0) {
+ goto end;
}
- context_data->handle = lur.ret_val;
- DBG("received context handle %u", context_data->handle);
+ context_data->handle = -1;
+ DBG("Context created successfully");
*_context_data = context_data;
+ context_data = NULL;
+end:
+ free(context_data);
+ free(buf);
return ret;
}
ret = ustcomm_send_unix_sock(sock, bytecode->data,
bytecode->len);
if (ret < 0) {
- if (ret == -ECONNRESET)
- fprintf(stderr, "remote end closed connection\n");
return ret;
}
if (ret != bytecode->len)
return ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd);
}
+int ustctl_set_capture(int sock, struct lttng_ust_capture_bytecode *bytecode,
+ struct lttng_ust_object_data *obj_data)
+{
+ struct ustcomm_ust_msg lum;
+ struct ustcomm_ust_reply lur;
+ int ret;
+
+ if (!obj_data)
+ return -EINVAL;
+
+ memset(&lum, 0, sizeof(lum));
+ lum.handle = obj_data->handle;
+ lum.cmd = LTTNG_UST_CAPTURE;
+ lum.u.capture.data_size = bytecode->len;
+ lum.u.capture.reloc_offset = bytecode->reloc_offset;
+ lum.u.capture.seqnum = bytecode->seqnum;
+
+ ret = ustcomm_send_app_msg(sock, &lum);
+ if (ret)
+ return ret;
+ /* send var len bytecode */
+ ret = ustcomm_send_unix_sock(sock, bytecode->data,
+ bytecode->len);
+ if (ret < 0) {
+ return ret;
+ }
+ if (ret != bytecode->len)
+ return -EINVAL;
+ return ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd);
+}
+
+int ustctl_set_exclusion(int sock, struct lttng_ust_event_exclusion *exclusion,
+ struct lttng_ust_object_data *obj_data)
+{
+ struct ustcomm_ust_msg lum;
+ struct ustcomm_ust_reply lur;
+ int ret;
+
+ if (!obj_data) {
+ return -EINVAL;
+ }
+
+ memset(&lum, 0, sizeof(lum));
+ lum.handle = obj_data->handle;
+ lum.cmd = LTTNG_UST_EXCLUSION;
+ lum.u.exclusion.count = exclusion->count;
+
+ ret = ustcomm_send_app_msg(sock, &lum);
+ if (ret) {
+ return ret;
+ }
+
+ /* send var len exclusion names */
+ ret = ustcomm_send_unix_sock(sock,
+ exclusion->names,
+ exclusion->count * LTTNG_UST_SYM_NAME_LEN);
+ if (ret < 0) {
+ return ret;
+ }
+ if (ret != exclusion->count * LTTNG_UST_SYM_NAME_LEN) {
+ return -EINVAL;
+ }
+ return ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd);
+}
+
/* Enable event, channel and session ioctl */
int ustctl_enable(int sock, struct lttng_ust_object_data *object)
{
return ustctl_disable(sock, &obj);
}
+int ustctl_create_event_notifier_group(int sock, int pipe_fd,
+ struct lttng_ust_object_data **_event_notifier_group_data)
+{
+ struct lttng_ust_object_data *event_notifier_group_data;
+ struct ustcomm_ust_msg lum;
+ struct ustcomm_ust_reply lur;
+ ssize_t len;
+ int ret;
+
+ if (!_event_notifier_group_data)
+ return -EINVAL;
+
+ event_notifier_group_data = zmalloc(sizeof(*event_notifier_group_data));
+ if (!event_notifier_group_data)
+ return -ENOMEM;
+
+ event_notifier_group_data->type = LTTNG_UST_OBJECT_TYPE_EVENT_NOTIFIER_GROUP;
+
+ memset(&lum, 0, sizeof(lum));
+ lum.handle = LTTNG_UST_ROOT_HANDLE;
+ lum.cmd = LTTNG_UST_EVENT_NOTIFIER_GROUP_CREATE;
+
+ ret = ustcomm_send_app_msg(sock, &lum);
+ if (ret)
+ goto error;
+
+ /* Send event_notifier notification pipe. */
+ len = ustcomm_send_fds_unix_sock(sock, &pipe_fd, 1);
+ if (len <= 0) {
+ ret = len;
+ goto error;
+ }
+
+ ret = ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd);
+ if (ret)
+ goto error;
+
+ event_notifier_group_data->handle = lur.ret_val;
+ DBG("received event_notifier group handle %d", event_notifier_group_data->handle);
+
+ *_event_notifier_group_data = event_notifier_group_data;
+
+ ret = 0;
+ goto end;
+error:
+ free(event_notifier_group_data);
+
+end:
+ return ret;
+}
+
+int ustctl_create_event_notifier(int sock, struct lttng_ust_event_notifier *event_notifier,
+ struct lttng_ust_object_data *event_notifier_group,
+ struct lttng_ust_object_data **_event_notifier_data)
+{
+ struct ustcomm_ust_msg lum;
+ struct ustcomm_ust_reply lur;
+ struct lttng_ust_object_data *event_notifier_data;
+ ssize_t len;
+ int ret;
+
+ if (!event_notifier_group || !_event_notifier_data)
+ return -EINVAL;
+
+ event_notifier_data = zmalloc(sizeof(*event_notifier_data));
+ if (!event_notifier_data)
+ return -ENOMEM;
+
+ event_notifier_data->type = LTTNG_UST_OBJECT_TYPE_EVENT_NOTIFIER;
+
+ memset(&lum, 0, sizeof(lum));
+ lum.handle = event_notifier_group->handle;
+ lum.cmd = LTTNG_UST_EVENT_NOTIFIER_CREATE;
+ lum.u.event_notifier.len = sizeof(*event_notifier);
+
+ ret = ustcomm_send_app_msg(sock, &lum);
+ if (ret) {
+ free(event_notifier_data);
+ return ret;
+ }
+ /* Send struct lttng_ust_event_notifier */
+ len = ustcomm_send_unix_sock(sock, event_notifier, sizeof(*event_notifier));
+ if (len != sizeof(*event_notifier)) {
+ if (len < 0)
+ return len;
+ else
+ return -EIO;
+ }
+ ret = ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd);
+ if (ret) {
+ free(event_notifier_data);
+ return ret;
+ }
+ event_notifier_data->handle = lur.ret_val;
+ DBG("received event_notifier handle %u", event_notifier_data->handle);
+ *_event_notifier_data = event_notifier_data;
+
+ return ret;
+}
+
int ustctl_tracepoint_list(int sock)
{
struct ustcomm_ust_msg lum;
return 0;
}
-/* Buffer operations */
-
-/* Map channel shm into process memory */
-struct lttng_ust_shm_handle *ustctl_map_channel(struct lttng_ust_object_data *chan_data)
+static
+int ustctl_send_channel(int sock,
+ enum lttng_ust_chan_type type,
+ void *data,
+ uint64_t size,
+ int wakeup_fd,
+ int send_fd_only)
{
- struct lttng_ust_shm_handle *handle;
- struct channel *chan;
- size_t chan_size;
- struct lttng_ust_lib_ring_buffer_config *config;
- int ret;
+ ssize_t len;
- if (!chan_data)
- return NULL;
+ if (!send_fd_only) {
+ /* Send mmap size */
+ len = ustcomm_send_unix_sock(sock, &size, sizeof(size));
+ if (len != sizeof(size)) {
+ if (len < 0)
+ return len;
+ else
+ return -EIO;
+ }
- handle = channel_handle_create(chan_data->shm_fd,
- chan_data->wait_fd,
- chan_data->memory_map_size);
- if (!handle) {
- ERR("create handle error");
- return NULL;
+ /* Send channel type */
+ len = ustcomm_send_unix_sock(sock, &type, sizeof(type));
+ if (len != sizeof(type)) {
+ if (len < 0)
+ return len;
+ else
+ return -EIO;
+ }
}
- /*
- * Set to -1, and then close the shm fd, and set the handle shm
- * fd to -1 too. We don't need the shm fds after they have been
- * mapped.
- * The wait_fd is set to -1 in chan_data because it is now owned
- * by the handle.
- */
- chan_data->shm_fd = -1;
- chan_data->wait_fd = -1;
-
- /* chan is object 0. This is hardcoded. */
- if (handle->table->objects[0].shm_fd >= 0) {
- ret = close(handle->table->objects[0].shm_fd);
- if (ret) {
- perror("Error closing shm_fd");
- }
- handle->table->objects[0].shm_fd = -1;
- }
-
- /*
- * TODO: add consistency checks to be resilient if the
- * application try to feed us with incoherent channel structure
- * values.
- */
- chan = shmp(handle, handle->chan);
- /* chan is object 0. This is hardcoded. */
- chan_size = handle->table->objects[0].allocated_len;
- handle->shadow_chan = malloc(chan_size);
- if (!handle->shadow_chan) {
- channel_destroy(chan, handle, 1);
- return NULL;
+
+ /* Send channel data */
+ len = ustcomm_send_unix_sock(sock, data, size);
+ if (len != size) {
+ if (len < 0)
+ return len;
+ else
+ return -EIO;
}
- memcpy(handle->shadow_chan, chan, chan_size);
- /*
- * The callback pointers in the producer are invalid in the
- * consumer. We need to look them up here.
- */
- config = &handle->shadow_chan->backend.config;
- switch (config->client_type) {
- case LTTNG_CLIENT_METADATA:
- memcpy(&config->cb, lttng_client_callbacks_metadata,
- sizeof(config->cb));
- break;
- case LTTNG_CLIENT_DISCARD:
- memcpy(&config->cb, lttng_client_callbacks_discard,
- sizeof(config->cb));
- break;
- case LTTNG_CLIENT_OVERWRITE:
- memcpy(&config->cb, lttng_client_callbacks_overwrite,
- sizeof(config->cb));
- break;
+
+ /* Send wakeup fd */
+ len = ustcomm_send_fds_unix_sock(sock, &wakeup_fd, 1);
+ if (len <= 0) {
+ if (len < 0)
+ return len;
+ else
+ return -EIO;
+ }
+ return 0;
+}
+
+static
+int ustctl_send_stream(int sock,
+ uint32_t stream_nr,
+ uint64_t memory_map_size,
+ int shm_fd, int wakeup_fd,
+ int send_fd_only)
+{
+ ssize_t len;
+ int fds[2];
+
+ if (!send_fd_only) {
+ if (shm_fd < 0) {
+ /* finish iteration */
+ uint64_t v = -1;
+
+ len = ustcomm_send_unix_sock(sock, &v, sizeof(v));
+ if (len != sizeof(v)) {
+ if (len < 0)
+ return len;
+ else
+ return -EIO;
+ }
+ return 0;
+ }
+
+ /* Send mmap size */
+ len = ustcomm_send_unix_sock(sock, &memory_map_size,
+ sizeof(memory_map_size));
+ if (len != sizeof(memory_map_size)) {
+ if (len < 0)
+ return len;
+ else
+ return -EIO;
+ }
+
+ /* Send stream nr */
+ len = ustcomm_send_unix_sock(sock, &stream_nr,
+ sizeof(stream_nr));
+ if (len != sizeof(stream_nr)) {
+ if (len < 0)
+ return len;
+ else
+ return -EIO;
+ }
+ }
+
+ /* Send shm fd and wakeup fd */
+ fds[0] = shm_fd;
+ fds[1] = wakeup_fd;
+ len = ustcomm_send_fds_unix_sock(sock, fds, 2);
+ if (len <= 0) {
+ if (len < 0)
+ return len;
+ else
+ return -EIO;
+ }
+ return 0;
+}
+
+int ustctl_recv_channel_from_consumer(int sock,
+ struct lttng_ust_object_data **_channel_data)
+{
+ struct lttng_ust_object_data *channel_data;
+ ssize_t len;
+ int wakeup_fd;
+ int ret;
+
+ channel_data = zmalloc(sizeof(*channel_data));
+ if (!channel_data) {
+ ret = -ENOMEM;
+ goto error_alloc;
+ }
+ channel_data->type = LTTNG_UST_OBJECT_TYPE_CHANNEL;
+ channel_data->handle = -1;
+
+ /* recv mmap size */
+ len = ustcomm_recv_unix_sock(sock, &channel_data->size,
+ sizeof(channel_data->size));
+ if (len != sizeof(channel_data->size)) {
+ if (len < 0)
+ ret = len;
+ else
+ ret = -EINVAL;
+ goto error;
+ }
+
+ /* recv channel type */
+ len = ustcomm_recv_unix_sock(sock, &channel_data->u.channel.type,
+ sizeof(channel_data->u.channel.type));
+ if (len != sizeof(channel_data->u.channel.type)) {
+ if (len < 0)
+ ret = len;
+ else
+ ret = -EINVAL;
+ goto error;
+ }
+
+ /* recv channel data */
+ channel_data->u.channel.data = zmalloc(channel_data->size);
+ if (!channel_data->u.channel.data) {
+ ret = -ENOMEM;
+ goto error;
+ }
+ len = ustcomm_recv_unix_sock(sock, channel_data->u.channel.data,
+ channel_data->size);
+ if (len != channel_data->size) {
+ if (len < 0)
+ ret = len;
+ else
+ ret = -EINVAL;
+ goto error_recv_data;
+ }
+ /* recv wakeup fd */
+ len = ustcomm_recv_fds_unix_sock(sock, &wakeup_fd, 1);
+ if (len <= 0) {
+ if (len < 0) {
+ ret = len;
+ goto error_recv_data;
+ } else {
+ ret = -EIO;
+ goto error_recv_data;
+ }
+ }
+ channel_data->u.channel.wakeup_fd = wakeup_fd;
+ *_channel_data = channel_data;
+ return 0;
+
+error_recv_data:
+ free(channel_data->u.channel.data);
+error:
+ free(channel_data);
+error_alloc:
+ return ret;
+}
+
+int ustctl_recv_stream_from_consumer(int sock,
+ struct lttng_ust_object_data **_stream_data)
+{
+ struct lttng_ust_object_data *stream_data;
+ ssize_t len;
+ int ret;
+ int fds[2];
+
+ stream_data = zmalloc(sizeof(*stream_data));
+ if (!stream_data) {
+ ret = -ENOMEM;
+ goto error_alloc;
+ }
+
+ stream_data->type = LTTNG_UST_OBJECT_TYPE_STREAM;
+ stream_data->handle = -1;
+
+ /* recv mmap size */
+ len = ustcomm_recv_unix_sock(sock, &stream_data->size,
+ sizeof(stream_data->size));
+ if (len != sizeof(stream_data->size)) {
+ if (len < 0)
+ ret = len;
+ else
+ ret = -EINVAL;
+ goto error;
+ }
+ if (stream_data->size == -1) {
+ ret = -LTTNG_UST_ERR_NOENT;
+ goto error;
+ }
+
+ /* recv stream nr */
+ len = ustcomm_recv_unix_sock(sock, &stream_data->u.stream.stream_nr,
+ sizeof(stream_data->u.stream.stream_nr));
+ if (len != sizeof(stream_data->u.stream.stream_nr)) {
+ if (len < 0)
+ ret = len;
+ else
+ ret = -EINVAL;
+ goto error;
+ }
+
+ /* recv shm fd and wakeup fd */
+ len = ustcomm_recv_fds_unix_sock(sock, fds, 2);
+ if (len <= 0) {
+ if (len < 0) {
+ ret = len;
+ goto error;
+ } else {
+ ret = -EIO;
+ goto error;
+ }
+ }
+ stream_data->u.stream.shm_fd = fds[0];
+ stream_data->u.stream.wakeup_fd = fds[1];
+ *_stream_data = stream_data;
+ return 0;
+
+error:
+ free(stream_data);
+error_alloc:
+ return ret;
+}
+
+int ustctl_send_channel_to_ust(int sock, int session_handle,
+ struct lttng_ust_object_data *channel_data)
+{
+ struct ustcomm_ust_msg lum;
+ struct ustcomm_ust_reply lur;
+ int ret;
+
+ if (!channel_data)
+ return -EINVAL;
+
+ memset(&lum, 0, sizeof(lum));
+ lum.handle = session_handle;
+ lum.cmd = LTTNG_UST_CHANNEL;
+ lum.u.channel.len = channel_data->size;
+ lum.u.channel.type = channel_data->u.channel.type;
+ ret = ustcomm_send_app_msg(sock, &lum);
+ if (ret)
+ return ret;
+
+ ret = ustctl_send_channel(sock,
+ channel_data->u.channel.type,
+ channel_data->u.channel.data,
+ channel_data->size,
+ channel_data->u.channel.wakeup_fd,
+ 1);
+ if (ret)
+ return ret;
+ ret = ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd);
+ if (!ret) {
+ channel_data->handle = lur.ret_val;
+ }
+ return ret;
+}
+
+int ustctl_send_stream_to_ust(int sock,
+ struct lttng_ust_object_data *channel_data,
+ struct lttng_ust_object_data *stream_data)
+{
+ struct ustcomm_ust_msg lum;
+ struct ustcomm_ust_reply lur;
+ int ret;
+
+ memset(&lum, 0, sizeof(lum));
+ lum.handle = channel_data->handle;
+ lum.cmd = LTTNG_UST_STREAM;
+ lum.u.stream.len = stream_data->size;
+ lum.u.stream.stream_nr = stream_data->u.stream.stream_nr;
+ ret = ustcomm_send_app_msg(sock, &lum);
+ if (ret)
+ return ret;
+
+ assert(stream_data);
+ assert(stream_data->type == LTTNG_UST_OBJECT_TYPE_STREAM);
+
+ ret = ustctl_send_stream(sock,
+ stream_data->u.stream.stream_nr,
+ stream_data->size,
+ stream_data->u.stream.shm_fd,
+ stream_data->u.stream.wakeup_fd, 1);
+ if (ret)
+ return ret;
+ return ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd);
+}
+
+int ustctl_duplicate_ust_object_data(struct lttng_ust_object_data **dest,
+ struct lttng_ust_object_data *src)
+{
+ struct lttng_ust_object_data *obj;
+ int ret;
+
+ if (src->handle != -1) {
+ ret = -EINVAL;
+ goto error;
+ }
+
+ obj = zmalloc(sizeof(*obj));
+ if (!obj) {
+ ret = -ENOMEM;
+ goto error;
+ }
+
+ obj->type = src->type;
+ obj->handle = src->handle;
+ obj->size = src->size;
+
+ switch (obj->type) {
+ case LTTNG_UST_OBJECT_TYPE_CHANNEL:
+ {
+ obj->u.channel.type = src->u.channel.type;
+ if (src->u.channel.wakeup_fd >= 0) {
+ obj->u.channel.wakeup_fd =
+ dup(src->u.channel.wakeup_fd);
+ if (obj->u.channel.wakeup_fd < 0) {
+ ret = errno;
+ goto chan_error_wakeup_fd;
+ }
+ } else {
+ obj->u.channel.wakeup_fd =
+ src->u.channel.wakeup_fd;
+ }
+ obj->u.channel.data = zmalloc(obj->size);
+ if (!obj->u.channel.data) {
+ ret = -ENOMEM;
+ goto chan_error_alloc;
+ }
+ memcpy(obj->u.channel.data, src->u.channel.data, obj->size);
+ break;
+
+ chan_error_alloc:
+ if (src->u.channel.wakeup_fd >= 0) {
+ int closeret;
+
+ closeret = close(obj->u.channel.wakeup_fd);
+ if (closeret) {
+ PERROR("close");
+ }
+ }
+ chan_error_wakeup_fd:
+ goto error_type;
+
+ }
+
+ case LTTNG_UST_OBJECT_TYPE_STREAM:
+ {
+ obj->u.stream.stream_nr = src->u.stream.stream_nr;
+ if (src->u.stream.wakeup_fd >= 0) {
+ obj->u.stream.wakeup_fd =
+ dup(src->u.stream.wakeup_fd);
+ if (obj->u.stream.wakeup_fd < 0) {
+ ret = errno;
+ goto stream_error_wakeup_fd;
+ }
+ } else {
+ obj->u.stream.wakeup_fd =
+ src->u.stream.wakeup_fd;
+ }
+
+ if (src->u.stream.shm_fd >= 0) {
+ obj->u.stream.shm_fd =
+ dup(src->u.stream.shm_fd);
+ if (obj->u.stream.shm_fd < 0) {
+ ret = errno;
+ goto stream_error_shm_fd;
+ }
+ } else {
+ obj->u.stream.shm_fd =
+ src->u.stream.shm_fd;
+ }
+ break;
+
+ stream_error_shm_fd:
+ if (src->u.stream.wakeup_fd >= 0) {
+ int closeret;
+
+ closeret = close(obj->u.stream.wakeup_fd);
+ if (closeret) {
+ PERROR("close");
+ }
+ }
+ stream_error_wakeup_fd:
+ goto error_type;
+ }
+
+ case LTTNG_UST_OBJECT_TYPE_COUNTER:
+ {
+ obj->u.counter.data = zmalloc(obj->size);
+ if (!obj->u.counter.data) {
+ ret = -ENOMEM;
+ goto error_type;
+ }
+ memcpy(obj->u.counter.data, src->u.counter.data, obj->size);
+ break;
+ }
+
+ case LTTNG_UST_OBJECT_TYPE_COUNTER_GLOBAL:
+ {
+ if (src->u.counter_global.shm_fd >= 0) {
+ obj->u.counter_global.shm_fd =
+ dup(src->u.counter_global.shm_fd);
+ if (obj->u.counter_global.shm_fd < 0) {
+ ret = errno;
+ goto error_type;
+ }
+ }
+ break;
+ }
+
+ case LTTNG_UST_OBJECT_TYPE_COUNTER_CPU:
+ {
+ obj->u.counter_cpu.cpu_nr = src->u.counter_cpu.cpu_nr;
+ if (src->u.counter_cpu.shm_fd >= 0) {
+ obj->u.counter_cpu.shm_fd =
+ dup(src->u.counter_cpu.shm_fd);
+ if (obj->u.counter_cpu.shm_fd < 0) {
+ ret = errno;
+ goto error_type;
+ }
+ }
+ break;
+ }
+
+ default:
+ ret = -EINVAL;
+ goto error_type;
+ }
+
+ *dest = obj;
+ return 0;
+
+error_type:
+ free(obj);
+error:
+ return ret;
+}
+
+
+/* Buffer operations */
+
+int ustctl_get_nr_stream_per_channel(void)
+{
+ return num_possible_cpus();
+}
+
+struct ustctl_consumer_channel *
+ ustctl_create_channel(struct ustctl_consumer_channel_attr *attr,
+ const int *stream_fds, int nr_stream_fds)
+{
+ struct ustctl_consumer_channel *chan;
+ const char *transport_name;
+ struct lttng_transport *transport;
+
+ switch (attr->type) {
+ case LTTNG_UST_CHAN_PER_CPU:
+ if (attr->output == LTTNG_UST_MMAP) {
+ if (attr->overwrite) {
+ if (attr->read_timer_interval == 0) {
+ transport_name = "relay-overwrite-mmap";
+ } else {
+ transport_name = "relay-overwrite-rt-mmap";
+ }
+ } else {
+ if (attr->read_timer_interval == 0) {
+ transport_name = "relay-discard-mmap";
+ } else {
+ transport_name = "relay-discard-rt-mmap";
+ }
+ }
+ } else {
+ return NULL;
+ }
+ break;
+ case LTTNG_UST_CHAN_METADATA:
+ if (attr->output == LTTNG_UST_MMAP)
+ transport_name = "relay-metadata-mmap";
+ else
+ return NULL;
+ break;
+ default:
+ transport_name = "<unknown>";
+ return NULL;
+ }
+
+ transport = lttng_transport_find(transport_name);
+ if (!transport) {
+ DBG("LTTng transport %s not found\n",
+ transport_name);
+ return NULL;
+ }
+
+ chan = zmalloc(sizeof(*chan));
+ if (!chan)
+ return NULL;
+
+ chan->chan = transport->ops.channel_create(transport_name, NULL,
+ attr->subbuf_size, attr->num_subbuf,
+ attr->switch_timer_interval,
+ attr->read_timer_interval,
+ attr->uuid, attr->chan_id,
+ stream_fds, nr_stream_fds,
+ attr->blocking_timeout);
+ if (!chan->chan) {
+ goto chan_error;
+ }
+ chan->chan->ops = &transport->ops;
+ memcpy(&chan->attr, attr, sizeof(chan->attr));
+ chan->wait_fd = ustctl_channel_get_wait_fd(chan);
+ chan->wakeup_fd = ustctl_channel_get_wakeup_fd(chan);
+ return chan;
+
+chan_error:
+ free(chan);
+ return NULL;
+}
+
+void ustctl_destroy_channel(struct ustctl_consumer_channel *chan)
+{
+ (void) ustctl_channel_close_wait_fd(chan);
+ (void) ustctl_channel_close_wakeup_fd(chan);
+ chan->chan->ops->channel_destroy(chan->chan);
+ free(chan);
+}
+
+int ustctl_send_channel_to_sessiond(int sock,
+ struct ustctl_consumer_channel *channel)
+{
+ struct shm_object_table *table;
+
+ table = channel->chan->handle->table;
+ if (table->size <= 0)
+ return -EINVAL;
+ return ustctl_send_channel(sock,
+ channel->attr.type,
+ table->objects[0].memory_map,
+ table->objects[0].memory_map_size,
+ channel->wakeup_fd,
+ 0);
+}
+
+int ustctl_send_stream_to_sessiond(int sock,
+ struct ustctl_consumer_stream *stream)
+{
+ if (!stream)
+ return ustctl_send_stream(sock, -1U, -1U, -1, -1, 0);
+
+ return ustctl_send_stream(sock,
+ stream->cpu,
+ stream->memory_map_size,
+ stream->shm_fd, stream->wakeup_fd,
+ 0);
+}
+
+int ustctl_write_metadata_to_channel(
+ struct ustctl_consumer_channel *channel,
+ const char *metadata_str, /* NOT null-terminated */
+ size_t len) /* metadata length */
+{
+ struct lttng_ust_lib_ring_buffer_ctx ctx;
+ struct lttng_channel *chan = channel->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->packet_avail_size(chan->chan, chan->handle),
+ len - pos);
+ lib_ring_buffer_ctx_init(&ctx, chan->chan, NULL, reserve_len,
+ sizeof(char), -1, chan->handle, NULL);
+ /*
+ * We don't care about metadata buffer's records lost
+ * count, because we always retry here. Report error if
+ * we need to bail out after timeout or being
+ * interrupted.
+ */
+ waitret = wait_cond_interruptible_timeout(
+ ({
+ ret = chan->ops->event_reserve(&ctx, 0);
+ ret != -ENOBUFS || !ret;
+ }),
+ LTTNG_METADATA_TIMEOUT_MSEC);
+ if (waitret == -ETIMEDOUT || waitret == -EINTR || ret) {
+ DBG("LTTng: Failure to write metadata to buffers (%s)\n",
+ waitret == -EINTR ? "interrupted" :
+ (ret == -ENOBUFS ? "timeout" : "I/O error"));
+ if (waitret == -EINTR)
+ ret = waitret;
+ goto end;
+ }
+ chan->ops->event_write(&ctx, &str[pos], reserve_len);
+ chan->ops->event_commit(&ctx);
+ }
+end:
+ return ret;
+}
+
+/*
+ * Write at most one packet in the channel.
+ * Returns the number of bytes written on success, < 0 on error.
+ */
+ssize_t ustctl_write_one_packet_to_channel(
+ struct ustctl_consumer_channel *channel,
+ const char *metadata_str, /* NOT null-terminated */
+ size_t len) /* metadata length */
+{
+ struct lttng_ust_lib_ring_buffer_ctx ctx;
+ struct lttng_channel *chan = channel->chan;
+ const char *str = metadata_str;
+ ssize_t reserve_len;
+ int ret;
+
+ reserve_len = min_t(ssize_t,
+ chan->ops->packet_avail_size(chan->chan, chan->handle),
+ len);
+ lib_ring_buffer_ctx_init(&ctx, chan->chan, NULL, reserve_len,
+ sizeof(char), -1, chan->handle, NULL);
+ ret = chan->ops->event_reserve(&ctx, 0);
+ 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);
+
+end:
+ return reserve_len;
+}
+
+int ustctl_channel_close_wait_fd(struct ustctl_consumer_channel *consumer_chan)
+{
+ struct channel *chan;
+ int ret;
+
+ chan = consumer_chan->chan->chan;
+ ret = ring_buffer_channel_close_wait_fd(&chan->backend.config,
+ chan, chan->handle);
+ if (!ret)
+ consumer_chan->wait_fd = -1;
+ return ret;
+}
+
+int ustctl_channel_close_wakeup_fd(struct ustctl_consumer_channel *consumer_chan)
+{
+ struct channel *chan;
+ int ret;
+
+ chan = consumer_chan->chan->chan;
+ ret = ring_buffer_channel_close_wakeup_fd(&chan->backend.config,
+ chan, chan->handle);
+ if (!ret)
+ consumer_chan->wakeup_fd = -1;
+ return ret;
+}
+
+int ustctl_stream_close_wait_fd(struct ustctl_consumer_stream *stream)
+{
+ struct channel *chan;
+
+ chan = stream->chan->chan->chan;
+ return ring_buffer_stream_close_wait_fd(&chan->backend.config,
+ chan, stream->handle, stream->cpu);
+}
+
+int ustctl_stream_close_wakeup_fd(struct ustctl_consumer_stream *stream)
+{
+ struct channel *chan;
+
+ chan = stream->chan->chan->chan;
+ return ring_buffer_stream_close_wakeup_fd(&chan->backend.config,
+ chan, stream->handle, stream->cpu);
+}
+
+struct ustctl_consumer_stream *
+ ustctl_create_stream(struct ustctl_consumer_channel *channel,
+ int cpu)
+{
+ struct ustctl_consumer_stream *stream;
+ struct lttng_ust_shm_handle *handle;
+ struct channel *chan;
+ int shm_fd, wait_fd, wakeup_fd;
+ uint64_t memory_map_size;
+ struct lttng_ust_lib_ring_buffer *buf;
+ int ret;
+
+ if (!channel)
+ return NULL;
+ handle = channel->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,
+ &wakeup_fd, &memory_map_size);
+ if (!buf)
+ return NULL;
+ ret = lib_ring_buffer_open_read(buf, handle);
+ if (ret)
+ return NULL;
+
+ stream = zmalloc(sizeof(*stream));
+ if (!stream)
+ goto alloc_error;
+ stream->handle = handle;
+ stream->buf = buf;
+ stream->chan = channel;
+ stream->shm_fd = shm_fd;
+ stream->wait_fd = wait_fd;
+ stream->wakeup_fd = wakeup_fd;
+ stream->memory_map_size = memory_map_size;
+ stream->cpu = cpu;
+ return stream;
+
+alloc_error:
+ return NULL;
+}
+
+void ustctl_destroy_stream(struct ustctl_consumer_stream *stream)
+{
+ struct lttng_ust_lib_ring_buffer *buf;
+ struct ustctl_consumer_channel *consumer_chan;
+
+ assert(stream);
+ buf = stream->buf;
+ 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);
+ free(stream);
+}
+
+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);
+}
+
+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);
+}
+
+int ustctl_stream_get_wait_fd(struct ustctl_consumer_stream *stream)
+{
+ struct lttng_ust_lib_ring_buffer *buf;
+ struct ustctl_consumer_channel *consumer_chan;
+
+ if (!stream)
+ return -EINVAL;
+ buf = stream->buf;
+ consumer_chan = stream->chan;
+ return shm_get_wait_fd(consumer_chan->chan->handle, &buf->self._ref);
+}
+
+int ustctl_stream_get_wakeup_fd(struct ustctl_consumer_stream *stream)
+{
+ struct lttng_ust_lib_ring_buffer *buf;
+ struct ustctl_consumer_channel *consumer_chan;
+
+ if (!stream)
+ return -EINVAL;
+ buf = stream->buf;
+ consumer_chan = stream->chan;
+ return shm_get_wakeup_fd(consumer_chan->chan->handle, &buf->self._ref);
+}
+
+/* For mmap mode, readable without "get" operation */
+
+void *ustctl_get_mmap_base(struct ustctl_consumer_stream *stream)
+{
+ struct lttng_ust_lib_ring_buffer *buf;
+ struct ustctl_consumer_channel *consumer_chan;
+
+ if (!stream)
+ return NULL;
+ buf = stream->buf;
+ consumer_chan = stream->chan;
+ return shmp(consumer_chan->chan->handle, buf->backend.memory_map);
+}
+
+/* returns the length to mmap. */
+int ustctl_get_mmap_len(struct ustctl_consumer_stream *stream,
+ unsigned long *len)
+{
+ struct ustctl_consumer_channel *consumer_chan;
+ unsigned long mmap_buf_len;
+ struct channel *chan;
+
+ if (!stream)
+ return -EINVAL;
+ consumer_chan = stream->chan;
+ chan = consumer_chan->chan->chan;
+ if (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;
+ if (mmap_buf_len > INT_MAX)
+ return -EFBIG;
+ *len = mmap_buf_len;
+ return 0;
+}
+
+/* returns the maximum size for sub-buffers. */
+int ustctl_get_max_subbuf_size(struct ustctl_consumer_stream *stream,
+ unsigned long *len)
+{
+ struct ustctl_consumer_channel *consumer_chan;
+ struct channel *chan;
+
+ if (!stream)
+ return -EINVAL;
+ consumer_chan = stream->chan;
+ chan = consumer_chan->chan->chan;
+ *len = chan->backend.subbuf_size;
+ return 0;
+}
+
+/*
+ * For mmap mode, operate on the current packet (between get/put or
+ * get_next/put_next).
+ */
+
+/* returns the offset of the subbuffer belonging to the mmap reader. */
+int ustctl_get_mmap_read_offset(struct ustctl_consumer_stream *stream,
+ unsigned long *off)
+{
+ struct channel *chan;
+ unsigned long sb_bindex;
+ struct lttng_ust_lib_ring_buffer *buf;
+ struct ustctl_consumer_channel *consumer_chan;
+ struct lttng_ust_lib_ring_buffer_backend_pages_shmp *barray_idx;
+ struct lttng_ust_lib_ring_buffer_backend_pages *pages;
+
+ if (!stream)
+ return -EINVAL;
+ buf = stream->buf;
+ consumer_chan = stream->chan;
+ chan = consumer_chan->chan->chan;
+ if (chan->backend.config.output != RING_BUFFER_MMAP)
+ return -EINVAL;
+ sb_bindex = subbuffer_id_get_index(&chan->backend.config,
+ buf->backend.buf_rsb.id);
+ barray_idx = shmp_index(consumer_chan->chan->handle, buf->backend.array,
+ sb_bindex);
+ if (!barray_idx)
+ return -EINVAL;
+ pages = shmp(consumer_chan->chan->handle, barray_idx->shmp);
+ if (!pages)
+ return -EINVAL;
+ *off = pages->mmap_offset;
+ return 0;
+}
+
+/* returns the size of the current sub-buffer, without padding (for mmap). */
+int ustctl_get_subbuf_size(struct ustctl_consumer_stream *stream,
+ unsigned long *len)
+{
+ struct ustctl_consumer_channel *consumer_chan;
+ struct channel *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);
+ return 0;
+}
+
+/* returns the size of the current sub-buffer, without padding (for mmap). */
+int ustctl_get_padded_subbuf_size(struct ustctl_consumer_stream *stream,
+ unsigned long *len)
+{
+ struct ustctl_consumer_channel *consumer_chan;
+ struct channel *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);
+ *len = LTTNG_UST_PAGE_ALIGN(*len);
+ return 0;
+}
+
+/* Get exclusive read access to the next sub-buffer that can be read. */
+int ustctl_get_next_subbuf(struct ustctl_consumer_stream *stream)
+{
+ struct lttng_ust_lib_ring_buffer *buf;
+ struct ustctl_consumer_channel *consumer_chan;
+
+ if (!stream)
+ return -EINVAL;
+ buf = stream->buf;
+ consumer_chan = stream->chan;
+ return lib_ring_buffer_get_next_subbuf(buf,
+ consumer_chan->chan->handle);
+}
+
+
+/* Release exclusive sub-buffer access, move consumer forward. */
+int ustctl_put_next_subbuf(struct ustctl_consumer_stream *stream)
+{
+ struct lttng_ust_lib_ring_buffer *buf;
+ struct ustctl_consumer_channel *consumer_chan;
+
+ if (!stream)
+ return -EINVAL;
+ buf = stream->buf;
+ consumer_chan = stream->chan;
+ lib_ring_buffer_put_next_subbuf(buf, consumer_chan->chan->handle);
+ return 0;
+}
+
+/* snapshot */
+
+/* Get a snapshot of the current ring buffer producer and consumer positions */
+int ustctl_snapshot(struct ustctl_consumer_stream *stream)
+{
+ struct lttng_ust_lib_ring_buffer *buf;
+ struct ustctl_consumer_channel *consumer_chan;
+
+ if (!stream)
+ return -EINVAL;
+ buf = stream->buf;
+ consumer_chan = stream->chan;
+ return lib_ring_buffer_snapshot(buf, &buf->cons_snapshot,
+ &buf->prod_snapshot, consumer_chan->chan->handle);
+}
+
+/*
+ * Get a snapshot of the current ring buffer producer and consumer positions
+ * even if the consumed and produced positions are contained within the same
+ * subbuffer.
+ */
+int ustctl_snapshot_sample_positions(struct ustctl_consumer_stream *stream)
+{
+ struct lttng_ust_lib_ring_buffer *buf;
+ struct ustctl_consumer_channel *consumer_chan;
+
+ if (!stream)
+ return -EINVAL;
+ buf = stream->buf;
+ consumer_chan = stream->chan;
+ return lib_ring_buffer_snapshot_sample_positions(buf,
+ &buf->cons_snapshot, &buf->prod_snapshot,
+ consumer_chan->chan->handle);
+}
+
+/* Get the consumer position (iteration start) */
+int ustctl_snapshot_get_consumed(struct ustctl_consumer_stream *stream,
+ unsigned long *pos)
+{
+ struct lttng_ust_lib_ring_buffer *buf;
+
+ if (!stream)
+ return -EINVAL;
+ buf = stream->buf;
+ *pos = buf->cons_snapshot;
+ return 0;
+}
+
+/* Get the producer position (iteration end) */
+int ustctl_snapshot_get_produced(struct ustctl_consumer_stream *stream,
+ unsigned long *pos)
+{
+ struct lttng_ust_lib_ring_buffer *buf;
+
+ if (!stream)
+ return -EINVAL;
+ buf = stream->buf;
+ *pos = buf->prod_snapshot;
+ return 0;
+}
+
+/* Get exclusive read access to the specified sub-buffer position */
+int ustctl_get_subbuf(struct ustctl_consumer_stream *stream,
+ unsigned long *pos)
+{
+ struct lttng_ust_lib_ring_buffer *buf;
+ struct ustctl_consumer_channel *consumer_chan;
+
+ if (!stream)
+ return -EINVAL;
+ buf = stream->buf;
+ consumer_chan = stream->chan;
+ return lib_ring_buffer_get_subbuf(buf, *pos,
+ consumer_chan->chan->handle);
+}
+
+/* Release exclusive sub-buffer access */
+int ustctl_put_subbuf(struct ustctl_consumer_stream *stream)
+{
+ struct lttng_ust_lib_ring_buffer *buf;
+ struct ustctl_consumer_channel *consumer_chan;
+
+ if (!stream)
+ return -EINVAL;
+ buf = stream->buf;
+ consumer_chan = stream->chan;
+ lib_ring_buffer_put_subbuf(buf, consumer_chan->chan->handle);
+ return 0;
+}
+
+void ustctl_flush_buffer(struct ustctl_consumer_stream *stream,
+ int producer_active)
+{
+ struct lttng_ust_lib_ring_buffer *buf;
+ struct ustctl_consumer_channel *consumer_chan;
+
+ assert(stream);
+ buf = stream->buf;
+ consumer_chan = stream->chan;
+ lib_ring_buffer_switch_slow(buf,
+ producer_active ? SWITCH_ACTIVE : SWITCH_FLUSH,
+ consumer_chan->chan->handle);
+}
+
+void ustctl_clear_buffer(struct ustctl_consumer_stream *stream)
+{
+ struct lttng_ust_lib_ring_buffer *buf;
+ struct ustctl_consumer_channel *consumer_chan;
+
+ assert(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);
+}
+
+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 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;
+ client_cb = caa_container_of(config->cb_ptr,
+ struct lttng_ust_client_lib_ring_buffer_client_cb,
+ parent);
+ return client_cb;
+}
+
+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 *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);
+ if (!client_cb)
+ return -ENOSYS;
+ return client_cb->timestamp_begin(buf, handle, 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 *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);
+ if (!client_cb)
+ return -ENOSYS;
+ return client_cb->timestamp_end(buf, handle, 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 *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);
+ if (!client_cb)
+ return -ENOSYS;
+ return client_cb->events_discarded(buf, handle, 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 *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);
+ if (!client_cb)
+ return -ENOSYS;
+ return client_cb->content_size(buf, handle, 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 *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);
+ if (!client_cb)
+ return -ENOSYS;
+ return client_cb->packet_size(buf, handle, 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 *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);
+ if (!client_cb)
+ return -ENOSYS;
+ return client_cb->stream_id(buf, handle, 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 *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);
+ if (!client_cb || !client_cb->current_timestamp)
+ return -ENOSYS;
+ return client_cb->current_timestamp(buf, handle, 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 *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);
+ if (!client_cb || !client_cb->sequence_number)
+ return -ENOSYS;
+ return client_cb->sequence_number(buf, handle, 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 *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);
+ if (!client_cb)
+ return -ENOSYS;
+ return client_cb->instance_id(buf, handle, id);
+}
+
+#ifdef LTTNG_UST_HAVE_PERF_EVENT
+
+int ustctl_has_perf_counters(void)
+{
+ return 1;
+}
+
+#else
+
+int ustctl_has_perf_counters(void)
+{
+ return 0;
+}
+
+#endif
+
+#ifdef __linux__
+/*
+ * Override application pid/uid/gid with unix socket credentials. If
+ * the application announced a pid matching our view, it means it is
+ * within the same pid namespace, so expose the ppid provided by the
+ * application.
+ */
+static
+int get_cred(int sock,
+ const struct ustctl_reg_msg *reg_msg,
+ uint32_t *pid,
+ uint32_t *ppid,
+ uint32_t *uid,
+ uint32_t *gid)
+{
+ struct ucred ucred;
+ socklen_t ucred_len = sizeof(struct ucred);
+ int ret;
+
+ ret = getsockopt(sock, SOL_SOCKET, SO_PEERCRED, &ucred, &ucred_len);
+ if (ret) {
+ return -LTTNG_UST_ERR_PEERCRED;
+ }
+ DBG("Unix socket peercred [ pid: %u, uid: %u, gid: %u ], "
+ "application registered claiming [ pid: %u, ppid: %u, uid: %u, gid: %u ]",
+ ucred.pid, ucred.uid, ucred.gid,
+ reg_msg->pid, reg_msg->ppid, reg_msg->uid, reg_msg->gid);
+ if (!ucred.pid) {
+ ERR("Unix socket credential pid=0. Refusing application in distinct, non-nested pid namespace.");
+ return -LTTNG_UST_ERR_PEERCRED_PID;
+ }
+ *pid = ucred.pid;
+ *uid = ucred.uid;
+ *gid = ucred.gid;
+ if (ucred.pid == reg_msg->pid) {
+ *ppid = reg_msg->ppid;
+ } else {
+ *ppid = 0;
+ }
+ return 0;
+}
+#elif defined(__FreeBSD__)
+#include <sys/ucred.h>
+#include <sys/un.h>
+
+/*
+ * Override application uid/gid with unix socket credentials. Use the
+ * first group of the cr_groups.
+ * Use the pid and ppid provided by the application on registration.
+ */
+static
+int get_cred(int sock,
+ const struct ustctl_reg_msg *reg_msg,
+ uint32_t *pid,
+ uint32_t *ppid,
+ uint32_t *uid,
+ uint32_t *gid)
+{
+ struct xucred xucred;
+ socklen_t xucred_len = sizeof(struct xucred);
+ int ret;
+
+ ret = getsockopt(sock, SOL_SOCKET, LOCAL_PEERCRED, &xucred, &xucred_len);
+ if (ret) {
+ return -LTTNG_UST_ERR_PEERCRED;
+ }
+ if (xucred.cr_version != XUCRED_VERSION || xucred.cr_ngroups < 1) {
+ return -LTTNG_UST_ERR_PEERCRED;
+ }
+ DBG("Unix socket peercred [ uid: %u, gid: %u ], "
+ "application registered claiming [ pid: %d, ppid: %d, uid: %u, gid: %u ]",
+ xucred.cr_uid, xucred.cr_groups[0],
+ reg_msg->pid, reg_msg->ppid, reg_msg->uid, reg_msg->gid);
+ *pid = reg_msg->pid;
+ *ppid = reg_msg->ppid;
+ *uid = xucred.cr_uid;
+ *gid = xucred.cr_groups[0];
+ return 0;
+}
+#else
+#warning "Using insecure fallback: trusting user id provided by registered applications. Please consider implementing use of unix socket credentials on your platform."
+static
+int get_cred(int sock,
+ const struct ustctl_reg_msg *reg_msg,
+ uint32_t *pid,
+ uint32_t *ppid,
+ uint32_t *uid,
+ uint32_t *gid)
+{
+ DBG("Application registered claiming [ pid: %u, ppid: %d, uid: %u, gid: %u ]",
+ reg_msg->pid, reg_msg->ppid, reg_msg->uid, reg_msg->gid);
+ *pid = reg_msg->pid;
+ *ppid = reg_msg->ppid;
+ *uid = reg_msg->uid;
+ *gid = reg_msg->gid;
+ return 0;
+}
+#endif
+
+/*
+ * Returns 0 on success, negative error value on error.
+ */
+int ustctl_recv_reg_msg(int sock,
+ enum ustctl_socket_type *type,
+ uint32_t *major,
+ uint32_t *minor,
+ uint32_t *pid,
+ uint32_t *ppid,
+ uint32_t *uid,
+ uint32_t *gid,
+ uint32_t *bits_per_long,
+ uint32_t *uint8_t_alignment,
+ uint32_t *uint16_t_alignment,
+ uint32_t *uint32_t_alignment,
+ uint32_t *uint64_t_alignment,
+ uint32_t *long_alignment,
+ int *byte_order,
+ char *name)
+{
+ ssize_t len;
+ struct ustctl_reg_msg reg_msg;
+
+ len = ustcomm_recv_unix_sock(sock, ®_msg, sizeof(reg_msg));
+ if (len > 0 && len != sizeof(reg_msg))
+ return -EIO;
+ if (len == 0)
+ return -EPIPE;
+ if (len < 0)
+ return len;
+
+ if (reg_msg.magic == LTTNG_UST_COMM_MAGIC) {
+ *byte_order = BYTE_ORDER == BIG_ENDIAN ?
+ BIG_ENDIAN : LITTLE_ENDIAN;
+ } else if (reg_msg.magic == bswap_32(LTTNG_UST_COMM_MAGIC)) {
+ *byte_order = BYTE_ORDER == BIG_ENDIAN ?
+ LITTLE_ENDIAN : BIG_ENDIAN;
+ } else {
+ return -LTTNG_UST_ERR_INVAL_MAGIC;
+ }
+ switch (reg_msg.socket_type) {
+ case 0: *type = USTCTL_SOCKET_CMD;
+ break;
+ case 1: *type = USTCTL_SOCKET_NOTIFY;
+ break;
default:
- ERR("Unknown client type %d", config->client_type);
- channel_destroy(chan, handle, 1);
- free(handle->shadow_chan);
- return NULL;
+ return -LTTNG_UST_ERR_INVAL_SOCKET_TYPE;
}
- /* Replace the object table pointer. */
- ret = munmap(handle->table->objects[0].memory_map,
- handle->table->objects[0].memory_map_size);
- if (ret) {
- perror("munmap");
- assert(0);
+ *major = reg_msg.major;
+ *minor = reg_msg.minor;
+ *bits_per_long = reg_msg.bits_per_long;
+ *uint8_t_alignment = reg_msg.uint8_t_alignment;
+ *uint16_t_alignment = reg_msg.uint16_t_alignment;
+ *uint32_t_alignment = reg_msg.uint32_t_alignment;
+ *uint64_t_alignment = reg_msg.uint64_t_alignment;
+ *long_alignment = reg_msg.long_alignment;
+ memcpy(name, reg_msg.name, LTTNG_UST_ABI_PROCNAME_LEN);
+ if (reg_msg.major < LTTNG_UST_ABI_MAJOR_VERSION_OLDEST_COMPATIBLE ||
+ reg_msg.major > LTTNG_UST_ABI_MAJOR_VERSION) {
+ return -LTTNG_UST_ERR_UNSUP_MAJOR;
}
- handle->table->objects[0].memory_map = (char *) handle->shadow_chan;
- handle->table->objects[0].is_shadow = 1;
- return handle;
+ return get_cred(sock, ®_msg, pid, ppid, uid, gid);
}
-/* Add stream to channel shm and map its shm into process memory */
-int ustctl_add_stream(struct lttng_ust_shm_handle *handle,
- struct lttng_ust_object_data *stream_data)
+int ustctl_recv_notify(int sock, enum ustctl_notify_cmd *notify_cmd)
{
- int ret;
+ struct ustcomm_notify_hdr header;
+ ssize_t len;
- if (!handle || !stream_data)
+ len = ustcomm_recv_unix_sock(sock, &header, sizeof(header));
+ if (len > 0 && len != sizeof(header))
+ return -EIO;
+ if (len == 0)
+ return -EPIPE;
+ if (len < 0)
+ return len;
+ switch (header.notify_cmd) {
+ case 0:
+ *notify_cmd = USTCTL_NOTIFY_CMD_EVENT;
+ break;
+ case 1:
+ *notify_cmd = USTCTL_NOTIFY_CMD_CHANNEL;
+ break;
+ case 2:
+ *notify_cmd = USTCTL_NOTIFY_CMD_ENUM;
+ break;
+ default:
return -EINVAL;
-
- if (!stream_data->handle)
- return -ENOENT;
- /* map stream */
- ret = channel_handle_add_stream(handle,
- stream_data->shm_fd,
- stream_data->wait_fd,
- stream_data->memory_map_size);
- if (ret) {
- ERR("add stream error\n");
- return ret;
}
- /*
- * Set to -1 because the lttng_ust_shm_handle destruction will take care
- * of closing shm_fd and wait_fd.
- */
- stream_data->shm_fd = -1;
- stream_data->wait_fd = -1;
return 0;
}
-void ustctl_unmap_channel(struct lttng_ust_shm_handle *handle)
-{
- struct channel *chan;
-
- assert(handle);
- chan = shmp(handle, handle->chan);
- channel_destroy(chan, handle, 1);
- free(handle->shadow_chan);
-}
-
/*
- * ustctl closes the shm_fd fds after mapping it.
+ * Returns 0 on success, negative error value on error.
*/
-struct lttng_ust_lib_ring_buffer *ustctl_open_stream_read(struct lttng_ust_shm_handle *handle,
- int cpu)
+int ustctl_recv_register_event(int sock,
+ int *session_objd,
+ int *channel_objd,
+ char *event_name,
+ int *loglevel,
+ char **signature,
+ size_t *nr_fields,
+ struct ustctl_field **fields,
+ char **model_emf_uri)
{
- struct channel *chan;
- int *shm_fd, *wait_fd;
- uint64_t *memory_map_size;
- struct lttng_ust_lib_ring_buffer *buf;
- int ret;
+ ssize_t len;
+ struct ustcomm_notify_event_msg msg;
+ size_t signature_len, fields_len, model_emf_uri_len;
+ char *a_sign = NULL, *a_model_emf_uri = NULL;
+ struct ustctl_field *a_fields = NULL;
+
+ len = ustcomm_recv_unix_sock(sock, &msg, sizeof(msg));
+ if (len > 0 && len != sizeof(msg))
+ return -EIO;
+ if (len == 0)
+ return -EPIPE;
+ if (len < 0)
+ return len;
+
+ *session_objd = msg.session_objd;
+ *channel_objd = msg.channel_objd;
+ strncpy(event_name, msg.event_name, LTTNG_UST_SYM_NAME_LEN);
+ event_name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0';
+ *loglevel = msg.loglevel;
+ signature_len = msg.signature_len;
+ fields_len = msg.fields_len;
+
+ if (fields_len % sizeof(*a_fields) != 0) {
+ return -EINVAL;
+ }
- if (!handle)
- return NULL;
+ model_emf_uri_len = msg.model_emf_uri_len;
- chan = handle->shadow_chan;
- buf = channel_get_ring_buffer(&chan->backend.config,
- chan, cpu, handle, &shm_fd, &wait_fd, &memory_map_size);
- if (!buf)
- return NULL;
- ret = lib_ring_buffer_open_read(buf, handle, 1);
- if (ret)
- return NULL;
- /*
- * We can close shm_fd early, right after is has been mapped.
- */
- if (*shm_fd >= 0) {
- ret = close(*shm_fd);
- if (ret) {
- perror("Error closing shm_fd");
+ /* recv signature. contains at least \0. */
+ a_sign = zmalloc(signature_len);
+ if (!a_sign)
+ return -ENOMEM;
+ len = ustcomm_recv_unix_sock(sock, a_sign, signature_len);
+ if (len > 0 && len != signature_len) {
+ len = -EIO;
+ goto signature_error;
+ }
+ if (len == 0) {
+ len = -EPIPE;
+ goto signature_error;
+ }
+ if (len < 0) {
+ goto signature_error;
+ }
+ /* Enforce end of string */
+ a_sign[signature_len - 1] = '\0';
+
+ /* recv fields */
+ if (fields_len) {
+ a_fields = zmalloc(fields_len);
+ if (!a_fields) {
+ len = -ENOMEM;
+ goto signature_error;
+ }
+ len = ustcomm_recv_unix_sock(sock, a_fields, fields_len);
+ if (len > 0 && len != fields_len) {
+ len = -EIO;
+ goto fields_error;
+ }
+ if (len == 0) {
+ len = -EPIPE;
+ goto fields_error;
+ }
+ if (len < 0) {
+ goto fields_error;
}
- *shm_fd = -1;
}
- return buf;
-}
-void ustctl_close_stream_read(struct lttng_ust_shm_handle *handle,
- struct lttng_ust_lib_ring_buffer *buf)
-{
- assert(handle && buf);
- lib_ring_buffer_release_read(buf, handle, 1);
-}
+ if (model_emf_uri_len) {
+ /* recv model_emf_uri_len */
+ a_model_emf_uri = zmalloc(model_emf_uri_len);
+ if (!a_model_emf_uri) {
+ len = -ENOMEM;
+ goto fields_error;
+ }
+ len = ustcomm_recv_unix_sock(sock, a_model_emf_uri,
+ model_emf_uri_len);
+ if (len > 0 && len != model_emf_uri_len) {
+ len = -EIO;
+ goto model_error;
+ }
+ if (len == 0) {
+ len = -EPIPE;
+ goto model_error;
+ }
+ if (len < 0) {
+ goto model_error;
+ }
+ /* Enforce end of string */
+ a_model_emf_uri[model_emf_uri_len - 1] = '\0';
+ }
-/* For mmap mode, readable without "get" operation */
+ *signature = a_sign;
+ *nr_fields = fields_len / sizeof(*a_fields);
+ *fields = a_fields;
+ *model_emf_uri = a_model_emf_uri;
-void *ustctl_get_mmap_base(struct lttng_ust_shm_handle *handle,
- struct lttng_ust_lib_ring_buffer *buf)
-{
- if (!handle || !buf)
- return NULL;
- return shmp(handle, buf->backend.memory_map);
+ return 0;
+
+model_error:
+ free(a_model_emf_uri);
+fields_error:
+ free(a_fields);
+signature_error:
+ free(a_sign);
+ return len;
}
-/* returns the length to mmap. */
-int ustctl_get_mmap_len(struct lttng_ust_shm_handle *handle,
- struct lttng_ust_lib_ring_buffer *buf,
- unsigned long *len)
+/*
+ * Returns 0 on success, negative error value on error.
+ */
+int ustctl_reply_register_event(int sock,
+ uint32_t id,
+ int ret_code)
{
- unsigned long mmap_buf_len;
- struct channel *chan;
+ ssize_t len;
+ struct {
+ struct ustcomm_notify_hdr header;
+ struct ustcomm_notify_event_reply r;
+ } reply;
+
+ memset(&reply, 0, sizeof(reply));
+ reply.header.notify_cmd = USTCTL_NOTIFY_CMD_EVENT;
+ reply.r.ret_code = ret_code;
+ reply.r.event_id = id;
+ len = ustcomm_send_unix_sock(sock, &reply, sizeof(reply));
+ if (len > 0 && len != sizeof(reply))
+ return -EIO;
+ if (len < 0)
+ return len;
+ return 0;
+}
- if (!handle || !buf || !len)
+/*
+ * Returns 0 on success, negative UST or system error value on error.
+ */
+int ustctl_recv_register_enum(int sock,
+ int *session_objd,
+ char *enum_name,
+ struct ustctl_enum_entry **entries,
+ size_t *nr_entries)
+{
+ ssize_t len;
+ struct ustcomm_notify_enum_msg msg;
+ size_t entries_len;
+ struct ustctl_enum_entry *a_entries = NULL;
+
+ len = ustcomm_recv_unix_sock(sock, &msg, sizeof(msg));
+ if (len > 0 && len != sizeof(msg))
+ return -EIO;
+ if (len == 0)
+ return -EPIPE;
+ if (len < 0)
+ return len;
+
+ *session_objd = msg.session_objd;
+ strncpy(enum_name, msg.enum_name, LTTNG_UST_SYM_NAME_LEN);
+ enum_name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0';
+ entries_len = msg.entries_len;
+
+ if (entries_len % sizeof(*a_entries) != 0) {
return -EINVAL;
+ }
+
+ /* recv entries */
+ if (entries_len) {
+ a_entries = zmalloc(entries_len);
+ if (!a_entries)
+ return -ENOMEM;
+ len = ustcomm_recv_unix_sock(sock, a_entries, entries_len);
+ if (len > 0 && len != entries_len) {
+ len = -EIO;
+ goto entries_error;
+ }
+ if (len == 0) {
+ len = -EPIPE;
+ goto entries_error;
+ }
+ if (len < 0) {
+ goto entries_error;
+ }
+ }
+ *nr_entries = entries_len / sizeof(*a_entries);
+ *entries = a_entries;
- chan = handle->shadow_chan;
- if (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;
- if (mmap_buf_len > INT_MAX)
- return -EFBIG;
- *len = mmap_buf_len;
return 0;
+
+entries_error:
+ free(a_entries);
+ return len;
}
-/* returns the maximum size for sub-buffers. */
-int ustctl_get_max_subbuf_size(struct lttng_ust_shm_handle *handle,
- struct lttng_ust_lib_ring_buffer *buf,
- unsigned long *len)
+/*
+ * Returns 0 on success, negative error value on error.
+ */
+int ustctl_reply_register_enum(int sock,
+ uint64_t id,
+ int ret_code)
{
- struct channel *chan;
+ ssize_t len;
+ struct {
+ struct ustcomm_notify_hdr header;
+ struct ustcomm_notify_enum_reply r;
+ } reply;
+
+ memset(&reply, 0, sizeof(reply));
+ reply.header.notify_cmd = USTCTL_NOTIFY_CMD_ENUM;
+ reply.r.ret_code = ret_code;
+ reply.r.enum_id = id;
+ len = ustcomm_send_unix_sock(sock, &reply, sizeof(reply));
+ if (len > 0 && len != sizeof(reply))
+ return -EIO;
+ if (len < 0)
+ return len;
+ return 0;
+}
- if (!handle || !buf || !len)
+/*
+ * Returns 0 on success, negative UST or system error value on error.
+ */
+int ustctl_recv_register_channel(int sock,
+ int *session_objd, /* session descriptor (output) */
+ int *channel_objd, /* channel descriptor (output) */
+ size_t *nr_fields,
+ struct ustctl_field **fields)
+{
+ ssize_t len;
+ struct ustcomm_notify_channel_msg msg;
+ size_t fields_len;
+ struct ustctl_field *a_fields;
+
+ len = ustcomm_recv_unix_sock(sock, &msg, sizeof(msg));
+ if (len > 0 && len != sizeof(msg))
+ return -EIO;
+ if (len == 0)
+ return -EPIPE;
+ if (len < 0)
+ return len;
+
+ *session_objd = msg.session_objd;
+ *channel_objd = msg.channel_objd;
+ fields_len = msg.ctx_fields_len;
+
+ if (fields_len % sizeof(*a_fields) != 0) {
return -EINVAL;
+ }
- chan = handle->shadow_chan;
- *len = chan->backend.subbuf_size;
+ /* recv fields */
+ if (fields_len) {
+ a_fields = zmalloc(fields_len);
+ if (!a_fields) {
+ len = -ENOMEM;
+ goto alloc_error;
+ }
+ len = ustcomm_recv_unix_sock(sock, a_fields, fields_len);
+ if (len > 0 && len != fields_len) {
+ len = -EIO;
+ goto fields_error;
+ }
+ if (len == 0) {
+ len = -EPIPE;
+ goto fields_error;
+ }
+ if (len < 0) {
+ goto fields_error;
+ }
+ *fields = a_fields;
+ } else {
+ *fields = NULL;
+ }
+ *nr_fields = fields_len / sizeof(*a_fields);
return 0;
+
+fields_error:
+ free(a_fields);
+alloc_error:
+ return len;
}
/*
- * For mmap mode, operate on the current packet (between get/put or
- * get_next/put_next).
+ * Returns 0 on success, negative error value on error.
*/
-
-/* returns the offset of the subbuffer belonging to the mmap reader. */
-int ustctl_get_mmap_read_offset(struct lttng_ust_shm_handle *handle,
- struct lttng_ust_lib_ring_buffer *buf, unsigned long *off)
+int ustctl_reply_register_channel(int sock,
+ uint32_t chan_id,
+ enum ustctl_channel_header header_type,
+ int ret_code)
{
- struct channel *chan;
- unsigned long sb_bindex;
+ ssize_t len;
+ struct {
+ struct ustcomm_notify_hdr header;
+ struct ustcomm_notify_channel_reply r;
+ } reply;
+
+ memset(&reply, 0, sizeof(reply));
+ reply.header.notify_cmd = USTCTL_NOTIFY_CMD_CHANNEL;
+ reply.r.ret_code = ret_code;
+ reply.r.chan_id = chan_id;
+ switch (header_type) {
+ case USTCTL_CHANNEL_HEADER_COMPACT:
+ reply.r.header_type = 1;
+ break;
+ case USTCTL_CHANNEL_HEADER_LARGE:
+ reply.r.header_type = 2;
+ break;
+ default:
+ reply.r.header_type = 0;
+ break;
+ }
+ len = ustcomm_send_unix_sock(sock, &reply, sizeof(reply));
+ if (len > 0 && len != sizeof(reply))
+ return -EIO;
+ if (len < 0)
+ return len;
+ return 0;
+}
- if (!handle || !buf || !off)
- return -EINVAL;
+/* Regenerate the statedump. */
+int ustctl_regenerate_statedump(int sock, int handle)
+{
+ struct ustcomm_ust_msg lum;
+ struct ustcomm_ust_reply lur;
+ int ret;
- chan = handle->shadow_chan;
- if (chan->backend.config.output != RING_BUFFER_MMAP)
- return -EINVAL;
- sb_bindex = subbuffer_id_get_index(&chan->backend.config,
- buf->backend.buf_rsb.id);
- *off = shmp(handle, shmp_index(handle, buf->backend.array, sb_bindex)->shmp)->mmap_offset;
+ memset(&lum, 0, sizeof(lum));
+ lum.handle = handle;
+ lum.cmd = LTTNG_UST_SESSION_STATEDUMP;
+ ret = ustcomm_send_app_cmd(sock, &lum, &lur);
+ if (ret)
+ return ret;
+ DBG("Regenerated statedump for handle %u", handle);
return 0;
}
-/* returns the size of the current sub-buffer, without padding (for mmap). */
-int ustctl_get_subbuf_size(struct lttng_ust_shm_handle *handle,
- struct lttng_ust_lib_ring_buffer *buf, unsigned long *len)
+/* counter operations */
+
+int ustctl_get_nr_cpu_per_counter(void)
{
- struct channel *chan;
+ return lttng_counter_num_possible_cpus();
+}
- if (!handle || !buf || !len)
- return -EINVAL;
+struct ustctl_daemon_counter *
+ ustctl_create_counter(size_t nr_dimensions,
+ const struct ustctl_counter_dimension *dimensions,
+ int64_t global_sum_step,
+ int global_counter_fd,
+ int nr_counter_cpu_fds,
+ const int *counter_cpu_fds,
+ enum ustctl_counter_bitness bitness,
+ enum ustctl_counter_arithmetic arithmetic,
+ uint32_t alloc_flags)
+{
+ const char *transport_name;
+ struct ustctl_daemon_counter *counter;
+ struct lttng_counter_transport *transport;
+ struct lttng_counter_dimension ust_dim[LTTNG_COUNTER_DIMENSION_MAX];
+ size_t i;
- chan = handle->shadow_chan;
- *len = lib_ring_buffer_get_read_data_size(&chan->backend.config, buf,
- handle);
- return 0;
+ if (nr_dimensions > LTTNG_COUNTER_DIMENSION_MAX)
+ return NULL;
+ /* Currently, only per-cpu allocation is supported. */
+ switch (alloc_flags) {
+ case USTCTL_COUNTER_ALLOC_PER_CPU:
+ break;
+
+ case USTCTL_COUNTER_ALLOC_PER_CPU | USTCTL_COUNTER_ALLOC_GLOBAL:
+ case USTCTL_COUNTER_ALLOC_GLOBAL:
+ default:
+ return NULL;
+ }
+ switch (bitness) {
+ case USTCTL_COUNTER_BITNESS_32:
+ switch (arithmetic) {
+ case USTCTL_COUNTER_ARITHMETIC_MODULAR:
+ transport_name = "counter-per-cpu-32-modular";
+ break;
+ case USTCTL_COUNTER_ARITHMETIC_SATURATION:
+ transport_name = "counter-per-cpu-32-saturation";
+ break;
+ default:
+ return NULL;
+ }
+ break;
+ case USTCTL_COUNTER_BITNESS_64:
+ switch (arithmetic) {
+ case USTCTL_COUNTER_ARITHMETIC_MODULAR:
+ transport_name = "counter-per-cpu-64-modular";
+ break;
+ case USTCTL_COUNTER_ARITHMETIC_SATURATION:
+ transport_name = "counter-per-cpu-64-saturation";
+ break;
+ default:
+ return NULL;
+ }
+ break;
+ default:
+ return NULL;
+ }
+
+ transport = lttng_counter_transport_find(transport_name);
+ if (!transport) {
+ DBG("LTTng transport %s not found\n",
+ transport_name);
+ return NULL;
+ }
+
+ counter = zmalloc(sizeof(*counter));
+ if (!counter)
+ return NULL;
+ counter->attr = zmalloc(sizeof(*counter->attr));
+ if (!counter->attr)
+ goto free_counter;
+ counter->attr->bitness = bitness;
+ counter->attr->arithmetic = arithmetic;
+ counter->attr->nr_dimensions = nr_dimensions;
+ counter->attr->global_sum_step = global_sum_step;
+ for (i = 0; i < nr_dimensions; i++)
+ counter->attr->dimensions[i] = dimensions[i];
+
+ for (i = 0; i < nr_dimensions; i++) {
+ ust_dim[i].size = dimensions[i].size;
+ ust_dim[i].underflow_index = dimensions[i].underflow_index;
+ ust_dim[i].overflow_index = dimensions[i].overflow_index;
+ ust_dim[i].has_underflow = dimensions[i].has_underflow;
+ ust_dim[i].has_overflow = dimensions[i].has_overflow;
+ }
+ counter->counter = transport->ops.counter_create(nr_dimensions,
+ ust_dim, global_sum_step, global_counter_fd,
+ nr_counter_cpu_fds, counter_cpu_fds, true);
+ if (!counter->counter)
+ goto free_attr;
+ counter->ops = &transport->ops;
+ return counter;
+
+free_attr:
+ free(counter->attr);
+free_counter:
+ free(counter);
+ return NULL;
}
-/* returns the size of the current sub-buffer, without padding (for mmap). */
-int ustctl_get_padded_subbuf_size(struct lttng_ust_shm_handle *handle,
- struct lttng_ust_lib_ring_buffer *buf, unsigned long *len)
+int ustctl_create_counter_data(struct ustctl_daemon_counter *counter,
+ struct lttng_ust_object_data **_counter_data)
{
- struct channel *chan;
+ struct lttng_ust_object_data *counter_data;
+ struct lttng_ust_counter_conf counter_conf = {0};
+ size_t i;
+ int ret;
- if (!handle || !buf || !len)
+ switch (counter->attr->arithmetic) {
+ case USTCTL_COUNTER_ARITHMETIC_MODULAR:
+ counter_conf.arithmetic = LTTNG_UST_COUNTER_ARITHMETIC_MODULAR;
+ break;
+ case USTCTL_COUNTER_ARITHMETIC_SATURATION:
+ counter_conf.arithmetic = LTTNG_UST_COUNTER_ARITHMETIC_SATURATION;
+ break;
+ default:
+ return -EINVAL;
+ }
+ switch (counter->attr->bitness) {
+ case USTCTL_COUNTER_BITNESS_32:
+ counter_conf.bitness = LTTNG_UST_COUNTER_BITNESS_32;
+ break;
+ case USTCTL_COUNTER_BITNESS_64:
+ counter_conf.bitness = LTTNG_UST_COUNTER_BITNESS_64;
+ break;
+ default:
return -EINVAL;
+ }
+ counter_conf.number_dimensions = counter->attr->nr_dimensions;
+ counter_conf.global_sum_step = counter->attr->global_sum_step;
+ for (i = 0; i < counter->attr->nr_dimensions; i++) {
+ counter_conf.dimensions[i].size = counter->attr->dimensions[i].size;
+ counter_conf.dimensions[i].underflow_index = counter->attr->dimensions[i].underflow_index;
+ counter_conf.dimensions[i].overflow_index = counter->attr->dimensions[i].overflow_index;
+ counter_conf.dimensions[i].has_underflow = counter->attr->dimensions[i].has_underflow;
+ counter_conf.dimensions[i].has_overflow = counter->attr->dimensions[i].has_overflow;
+ }
+
+ counter_data = zmalloc(sizeof(*counter_data));
+ if (!counter_data) {
+ ret = -ENOMEM;
+ goto error_alloc;
+ }
+ counter_data->type = LTTNG_UST_OBJECT_TYPE_COUNTER;
+ counter_data->handle = -1;
+
+ counter_data->size = sizeof(counter_conf);
+ counter_data->u.counter.data = zmalloc(sizeof(counter_conf));
+ if (!counter_data->u.counter.data) {
+ ret = -ENOMEM;
+ goto error_alloc_data;
+ }
+
+ memcpy(counter_data->u.counter.data, &counter_conf, sizeof(counter_conf));
+ *_counter_data = counter_data;
- chan = handle->shadow_chan;
- *len = lib_ring_buffer_get_read_data_size(&chan->backend.config, buf,
- handle);
- *len = PAGE_ALIGN(*len);
return 0;
+
+error_alloc_data:
+ free(counter_data);
+error_alloc:
+ return ret;
}
-/* Get exclusive read access to the next sub-buffer that can be read. */
-int ustctl_get_next_subbuf(struct lttng_ust_shm_handle *handle,
- struct lttng_ust_lib_ring_buffer *buf)
+int ustctl_create_counter_global_data(struct ustctl_daemon_counter *counter,
+ struct lttng_ust_object_data **_counter_global_data)
{
- if (!handle || !buf)
+ struct lttng_ust_object_data *counter_global_data;
+ int ret, fd;
+ size_t len;
+
+ if (lttng_counter_get_global_shm(counter->counter, &fd, &len))
return -EINVAL;
+ counter_global_data = zmalloc(sizeof(*counter_global_data));
+ if (!counter_global_data) {
+ ret = -ENOMEM;
+ goto error_alloc;
+ }
+ counter_global_data->type = LTTNG_UST_OBJECT_TYPE_COUNTER_GLOBAL;
+ counter_global_data->handle = -1;
+ counter_global_data->size = len;
+ counter_global_data->u.counter_global.shm_fd = fd;
+ *_counter_global_data = counter_global_data;
+ return 0;
- return lib_ring_buffer_get_next_subbuf(buf, handle);
+error_alloc:
+ return ret;
}
-
-/* Release exclusive sub-buffer access, move consumer forward. */
-int ustctl_put_next_subbuf(struct lttng_ust_shm_handle *handle,
- struct lttng_ust_lib_ring_buffer *buf)
+int ustctl_create_counter_cpu_data(struct ustctl_daemon_counter *counter, int cpu,
+ struct lttng_ust_object_data **_counter_cpu_data)
{
- if (!handle || !buf)
- return -EINVAL;
+ struct lttng_ust_object_data *counter_cpu_data;
+ int ret, fd;
+ size_t len;
- lib_ring_buffer_put_next_subbuf(buf, handle);
+ if (lttng_counter_get_cpu_shm(counter->counter, cpu, &fd, &len))
+ return -EINVAL;
+ counter_cpu_data = zmalloc(sizeof(*counter_cpu_data));
+ if (!counter_cpu_data) {
+ ret = -ENOMEM;
+ goto error_alloc;
+ }
+ counter_cpu_data->type = LTTNG_UST_OBJECT_TYPE_COUNTER_CPU;
+ counter_cpu_data->handle = -1;
+ counter_cpu_data->size = len;
+ counter_cpu_data->u.counter_cpu.shm_fd = fd;
+ counter_cpu_data->u.counter_cpu.cpu_nr = cpu;
+ *_counter_cpu_data = counter_cpu_data;
return 0;
+
+error_alloc:
+ return ret;
}
-/* snapshot */
+void ustctl_destroy_counter(struct ustctl_daemon_counter *counter)
+{
+ counter->ops->counter_destroy(counter->counter);
+ free(counter->attr);
+ free(counter);
+}
-/* Get a snapshot of the current ring buffer producer and consumer positions */
-int ustctl_snapshot(struct lttng_ust_shm_handle *handle,
- struct lttng_ust_lib_ring_buffer *buf)
+int ustctl_send_counter_data_to_ust(int sock, int parent_handle,
+ struct lttng_ust_object_data *counter_data)
{
- if (!handle || !buf)
+ struct ustcomm_ust_msg lum;
+ struct ustcomm_ust_reply lur;
+ int ret;
+ size_t size;
+ ssize_t len;
+
+ if (!counter_data)
return -EINVAL;
- return lib_ring_buffer_snapshot(buf, &buf->cons_snapshot,
- &buf->prod_snapshot, handle);
+ size = counter_data->size;
+ memset(&lum, 0, sizeof(lum));
+ lum.handle = parent_handle;
+ lum.cmd = LTTNG_UST_COUNTER;
+ lum.u.counter.len = size;
+ ret = ustcomm_send_app_msg(sock, &lum);
+ if (ret)
+ return ret;
+
+ /* Send counter data */
+ len = ustcomm_send_unix_sock(sock, counter_data->u.counter.data, size);
+ if (len != size) {
+ if (len < 0)
+ return len;
+ else
+ return -EIO;
+ }
+
+ ret = ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd);
+ if (!ret) {
+ counter_data->handle = lur.ret_val;
+ }
+ return ret;
}
-/* Get the consumer position (iteration start) */
-int ustctl_snapshot_get_consumed(struct lttng_ust_shm_handle *handle,
- struct lttng_ust_lib_ring_buffer *buf, unsigned long *pos)
+int ustctl_send_counter_global_data_to_ust(int sock,
+ struct lttng_ust_object_data *counter_data,
+ struct lttng_ust_object_data *counter_global_data)
{
- if (!handle || !buf || !pos)
+ struct ustcomm_ust_msg lum;
+ struct ustcomm_ust_reply lur;
+ int ret, shm_fd[1];
+ size_t size;
+ ssize_t len;
+
+ if (!counter_data || !counter_global_data)
return -EINVAL;
- *pos = buf->cons_snapshot;
- return 0;
+ size = counter_global_data->size;
+ memset(&lum, 0, sizeof(lum));
+ lum.handle = counter_data->handle; /* parent handle */
+ lum.cmd = LTTNG_UST_COUNTER_GLOBAL;
+ lum.u.counter_global.len = size;
+ ret = ustcomm_send_app_msg(sock, &lum);
+ if (ret)
+ return ret;
+
+ shm_fd[0] = counter_global_data->u.counter_global.shm_fd;
+ len = ustcomm_send_fds_unix_sock(sock, shm_fd, 1);
+ if (len <= 0) {
+ if (len < 0)
+ return len;
+ else
+ return -EIO;
+ }
+
+ ret = ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd);
+ if (!ret) {
+ counter_global_data->handle = lur.ret_val;
+ }
+ return ret;
}
-/* Get the producer position (iteration end) */
-int ustctl_snapshot_get_produced(struct lttng_ust_shm_handle *handle,
- struct lttng_ust_lib_ring_buffer *buf, unsigned long *pos)
+int ustctl_send_counter_cpu_data_to_ust(int sock,
+ struct lttng_ust_object_data *counter_data,
+ struct lttng_ust_object_data *counter_cpu_data)
{
- if (!handle || !buf || !pos)
+ struct ustcomm_ust_msg lum;
+ struct ustcomm_ust_reply lur;
+ int ret, shm_fd[1];
+ size_t size;
+ ssize_t len;
+
+ if (!counter_data || !counter_cpu_data)
return -EINVAL;
- *pos = buf->prod_snapshot;
- return 0;
+ size = counter_cpu_data->size;
+ memset(&lum, 0, sizeof(lum));
+ lum.handle = counter_data->handle; /* parent handle */
+ lum.cmd = LTTNG_UST_COUNTER_CPU;
+ lum.u.counter_cpu.len = size;
+ lum.u.counter_cpu.cpu_nr = counter_cpu_data->u.counter_cpu.cpu_nr;
+ ret = ustcomm_send_app_msg(sock, &lum);
+ if (ret)
+ return ret;
+
+ shm_fd[0] = counter_cpu_data->u.counter_global.shm_fd;
+ len = ustcomm_send_fds_unix_sock(sock, shm_fd, 1);
+ if (len <= 0) {
+ if (len < 0)
+ return len;
+ else
+ return -EIO;
+ }
+
+ ret = ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd);
+ if (!ret) {
+ counter_cpu_data->handle = lur.ret_val;
+ }
+ return ret;
}
-/* Get exclusive read access to the specified sub-buffer position */
-int ustctl_get_subbuf(struct lttng_ust_shm_handle *handle,
- struct lttng_ust_lib_ring_buffer *buf, unsigned long *pos)
+int ustctl_counter_read(struct ustctl_daemon_counter *counter,
+ const size_t *dimension_indexes,
+ int cpu, int64_t *value,
+ bool *overflow, bool *underflow)
{
- if (!handle || !buf || !pos)
- return -EINVAL;
+ return counter->ops->counter_read(counter->counter, dimension_indexes, cpu,
+ value, overflow, underflow);
+}
- return lib_ring_buffer_get_subbuf(buf, *pos, handle);
+int ustctl_counter_aggregate(struct ustctl_daemon_counter *counter,
+ const size_t *dimension_indexes,
+ int64_t *value,
+ bool *overflow, bool *underflow)
+{
+ return counter->ops->counter_aggregate(counter->counter, dimension_indexes,
+ value, overflow, underflow);
}
-/* Release exclusive sub-buffer access */
-int ustctl_put_subbuf(struct lttng_ust_shm_handle *handle,
- struct lttng_ust_lib_ring_buffer *buf)
+int ustctl_counter_clear(struct ustctl_daemon_counter *counter,
+ const size_t *dimension_indexes)
{
- if (!handle || !buf)
- return -EINVAL;
+ return counter->ops->counter_clear(counter->counter, dimension_indexes);
+}
- lib_ring_buffer_put_subbuf(buf, handle);
- return 0;
+static __attribute__((constructor))
+void ustctl_init(void)
+{
+ init_usterr();
+ lttng_ust_getenv_init(); /* Needs init_usterr() 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();
+ lib_ringbuffer_signal_init();
}
-void ustctl_flush_buffer(struct lttng_ust_shm_handle *handle,
- struct lttng_ust_lib_ring_buffer *buf,
- int producer_active)
+static __attribute__((destructor))
+void ustctl_exit(void)
{
- assert(handle && buf);
- lib_ring_buffer_switch_slow(buf,
- producer_active ? SWITCH_ACTIVE : SWITCH_FLUSH,
- handle);
+ 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();
}
projects / lttng-ust.git / blobdiff