+ 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:
+ return -LTTNG_UST_ERR_INVAL_SOCKET_TYPE;
+ }
+ *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;
+ }
+ return get_cred(sock, ®_msg, pid, ppid, uid, gid);
+}
+
+int ustctl_recv_notify(int sock, enum ustctl_notify_cmd *notify_cmd)
+{
+ struct ustcomm_notify_hdr header;
+ ssize_t len;
+
+ 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;
+ }
+ return 0;
+}
+
+/*
+ * Returns 0 on success, negative error value on error.
+ */
+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)
+{
+ 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;
+ }
+
+ model_emf_uri_len = msg.model_emf_uri_len;
+
+ /* 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;
+ }
+ }
+
+ 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';
+ }
+
+ *signature = a_sign;
+ *nr_fields = fields_len / sizeof(*a_fields);
+ *fields = a_fields;
+ *model_emf_uri = a_model_emf_uri;
+
+ return 0;
+
+model_error:
+ free(a_model_emf_uri);
+fields_error:
+ free(a_fields);
+signature_error:
+ free(a_sign);
+ return len;
+}
+
+/*
+ * Returns 0 on success, negative error value on error.
+ */
+int ustctl_reply_register_event(int sock,
+ uint32_t id,
+ int ret_code)
+{
+ 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;
+}
+
+/*
+ * 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;
+
+ return 0;
+
+entries_error:
+ free(a_entries);
+ return len;
+}
+
+/*
+ * Returns 0 on success, negative error value on error.
+ */
+int ustctl_reply_register_enum(int sock,
+ uint64_t id,
+ int ret_code)
+{
+ 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;
+}
+
+/*
+ * 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;
+ }
+
+ /* 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;
+}
+
+/*
+ * Returns 0 on success, negative error value on error.
+ */
+int ustctl_reply_register_channel(int sock,
+ uint32_t chan_id,
+ enum ustctl_channel_header header_type,
+ int ret_code)
+{
+ 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;
+}
+
+/* Regenerate the statedump. */
+int ustctl_regenerate_statedump(int sock, int handle)
+{
+ struct ustcomm_ust_msg lum;
+ struct ustcomm_ust_reply lur;
+ int ret;
+
+ 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;
+}
+
+/* counter operations */
+
+int ustctl_get_nr_cpu_per_counter(void)
+{
+ return lttng_counter_num_possible_cpus();
+}
+
+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;
+
+ 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;
+}
+
+int ustctl_create_counter_data(struct ustctl_daemon_counter *counter,
+ struct lttng_ust_object_data **_counter_data)
+{
+ struct lttng_ust_object_data *counter_data;
+ struct lttng_ust_counter_conf counter_conf = {0};
+ size_t i;
+ int ret;
+
+ 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;
+
+ return 0;
+
+error_alloc_data:
+ free(counter_data);
+error_alloc:
+ return ret;
+}
+
+int ustctl_create_counter_global_data(struct ustctl_daemon_counter *counter,
+ struct lttng_ust_object_data **_counter_global_data)
+{
+ 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;
+
+error_alloc:
+ return ret;
+}
+
+int ustctl_create_counter_cpu_data(struct ustctl_daemon_counter *counter, int cpu,
+ struct lttng_ust_object_data **_counter_cpu_data)
+{
+ struct lttng_ust_object_data *counter_cpu_data;
+ int ret, fd;
+ size_t len;
+
+ 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;
+}
+
+void ustctl_destroy_counter(struct ustctl_daemon_counter *counter)
+{
+ counter->ops->counter_destroy(counter->counter);
+ free(counter->attr);
+ free(counter);
+}
+
+int ustctl_send_counter_data_to_ust(int sock, int parent_handle,
+ struct lttng_ust_object_data *counter_data)
+{
+ struct ustcomm_ust_msg lum;
+ struct ustcomm_ust_reply lur;
+ int ret;
+ size_t size;
+ ssize_t len;
+
+ if (!counter_data)
+ return -EINVAL;
+
+ 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;
+}
+
+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)
+{
+ 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;
+
+ 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;
+}
+
+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)
+{
+ 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;
+
+ 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;
+}
+
+int ustctl_counter_read(struct ustctl_daemon_counter *counter,
+ const size_t *dimension_indexes,
+ int cpu, int64_t *value,
+ bool *overflow, bool *underflow)
+{
+ return counter->ops->counter_read(counter->counter, dimension_indexes, cpu,
+ value, overflow, underflow);
+}
+
+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);
+}
+
+int ustctl_counter_clear(struct ustctl_daemon_counter *counter,
+ const size_t *dimension_indexes)
+{
+ return counter->ops->counter_clear(counter->counter, dimension_indexes);
+}
+
+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();
+}
+
+static __attribute__((destructor))
+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();