--- /dev/null
+/*
+ * Copyright (C) 2011 David Goulet <david.goulet@polymtl.ca>
+ * Copyright (C) 2016 Jérémie Galarneau <jeremie.galarneau@efficios.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0-only
+ *
+ */
+
+#define _LGPL_SOURCE
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <urcu/list.h>
+
+#include <common/error.h>
+#include <common/sessiond-comm/sessiond-comm.h>
+
+#include "context.h"
+#include "kernel.h"
+#include "ust-app.h"
+#include "trace-ust.h"
+#include "agent.h"
+
+/*
+ * Add kernel context to all channel.
+ *
+ * Assumes the ownership of kctx.
+ */
+static int add_kctx_all_channels(struct ltt_kernel_session *ksession,
+ struct ltt_kernel_context *kctx)
+{
+ int ret;
+ struct ltt_kernel_channel *kchan;
+
+ LTTNG_ASSERT(ksession);
+ LTTNG_ASSERT(kctx);
+
+ DBG("Adding kernel context to all channels");
+
+ /* Go over all channels */
+ cds_list_for_each_entry(kchan, &ksession->channel_list.head, list) {
+ struct ltt_kernel_context *kctx_copy;
+
+ kctx_copy = trace_kernel_copy_context(kctx);
+ if (!kctx_copy) {
+ PERROR("zmalloc ltt_kernel_context");
+ ret = -LTTNG_ERR_NOMEM;
+ goto error;
+ }
+
+ /* Ownership of kctx_copy is transferred to the callee. */
+ ret = kernel_add_channel_context(kchan, kctx_copy);
+ kctx_copy = NULL;
+ if (ret != 0) {
+ goto error;
+ }
+ }
+
+ ret = LTTNG_OK;
+
+error:
+ trace_kernel_destroy_context(kctx);
+ return ret;
+}
+
+/*
+ * Add kernel context to a specific channel.
+ *
+ * Assumes the ownership of kctx.
+ */
+static int add_kctx_to_channel(struct ltt_kernel_context *kctx,
+ struct ltt_kernel_channel *kchan)
+{
+ int ret;
+
+ LTTNG_ASSERT(kchan);
+ LTTNG_ASSERT(kctx);
+
+ DBG("Add kernel context to channel '%s'", kchan->channel->name);
+
+ /* Ownership of kctx is transferred to the callee. */
+ ret = kernel_add_channel_context(kchan, kctx);
+ kctx = NULL;
+ if (ret != 0) {
+ goto error;
+ }
+
+ ret = LTTNG_OK;
+
+error:
+ return ret;
+}
+
+/*
+ * Add UST context to channel.
+ */
+static int add_uctx_to_channel(struct ltt_ust_session *usess,
+ enum lttng_domain_type domain,
+ struct ltt_ust_channel *uchan,
+ const struct lttng_event_context *ctx)
+{
+ int ret;
+ struct ltt_ust_context *uctx = NULL;
+
+ LTTNG_ASSERT(usess);
+ LTTNG_ASSERT(uchan);
+ LTTNG_ASSERT(ctx);
+
+ /* Check if context is duplicate */
+ cds_list_for_each_entry(uctx, &uchan->ctx_list, list) {
+ if (trace_ust_match_context(uctx, ctx)) {
+ ret = LTTNG_ERR_UST_CONTEXT_EXIST;
+ goto duplicate;
+ }
+ }
+ uctx = NULL;
+
+ switch (domain) {
+ case LTTNG_DOMAIN_JUL:
+ case LTTNG_DOMAIN_LOG4J:
+ {
+ struct agent *agt;
+
+ if (ctx->ctx != LTTNG_EVENT_CONTEXT_APP_CONTEXT) {
+ /* Other contexts are not needed by the agent. */
+ break;
+ }
+ agt = trace_ust_find_agent(usess, domain);
+
+ if (!agt) {
+ agt = agent_create(domain);
+ if (!agt) {
+ ret = -LTTNG_ERR_NOMEM;
+ goto error;
+ }
+ agent_add(agt, usess->agents);
+ }
+ ret = agent_add_context(ctx, agt);
+ if (ret != LTTNG_OK) {
+ goto error;
+ }
+
+ ret = agent_enable_context(ctx, domain);
+ if (ret != LTTNG_OK) {
+ goto error;
+ }
+ break;
+ }
+ case LTTNG_DOMAIN_UST:
+ break;
+ default:
+ abort();
+ }
+
+ /* Create ltt UST context */
+ uctx = trace_ust_create_context(ctx);
+ if (uctx == NULL) {
+ ret = LTTNG_ERR_UST_CONTEXT_INVAL;
+ goto error;
+ }
+
+ /* Add ltt UST context node to ltt UST channel */
+ lttng_ht_add_ulong(uchan->ctx, &uctx->node);
+ cds_list_add_tail(&uctx->list, &uchan->ctx_list);
+
+ if (!usess->active) {
+ goto end;
+ }
+
+ ret = ust_app_add_ctx_channel_glb(usess, uchan, uctx);
+ if (ret < 0) {
+ goto error;
+ }
+end:
+ DBG("Context UST %d added to channel %s", uctx->ctx.ctx, uchan->name);
+
+ return 0;
+
+error:
+ free(uctx);
+duplicate:
+ return ret;
+}
+
+/*
+ * Add kernel context to tracer.
+ */
+int context_kernel_add(struct ltt_kernel_session *ksession,
+ const struct lttng_event_context *ctx, char *channel_name)
+{
+ int ret;
+ struct ltt_kernel_channel *kchan;
+ struct ltt_kernel_context *kctx;
+
+ LTTNG_ASSERT(ksession);
+ LTTNG_ASSERT(ctx);
+ LTTNG_ASSERT(channel_name);
+
+ kctx = trace_kernel_create_context(NULL);
+ if (!kctx) {
+ ret = -LTTNG_ERR_NOMEM;
+ goto error;
+ }
+
+ /* Setup kernel context structure */
+ switch (ctx->ctx) {
+ case LTTNG_EVENT_CONTEXT_PID:
+ kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_PID;
+ break;
+ case LTTNG_EVENT_CONTEXT_PROCNAME:
+ kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_PROCNAME;
+ break;
+ case LTTNG_EVENT_CONTEXT_PRIO:
+ kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_PRIO;
+ break;
+ case LTTNG_EVENT_CONTEXT_NICE:
+ kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_NICE;
+ break;
+ case LTTNG_EVENT_CONTEXT_VPID:
+ kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_VPID;
+ break;
+ case LTTNG_EVENT_CONTEXT_TID:
+ kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_TID;
+ break;
+ case LTTNG_EVENT_CONTEXT_VTID:
+ kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_VTID;
+ break;
+ case LTTNG_EVENT_CONTEXT_PPID:
+ kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_PPID;
+ break;
+ case LTTNG_EVENT_CONTEXT_VPPID:
+ kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_VPPID;
+ break;
+ case LTTNG_EVENT_CONTEXT_HOSTNAME:
+ kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_HOSTNAME;
+ break;
+ case LTTNG_EVENT_CONTEXT_PERF_CPU_COUNTER:
+ case LTTNG_EVENT_CONTEXT_PERF_COUNTER:
+ kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_PERF_CPU_COUNTER;
+ break;
+ case LTTNG_EVENT_CONTEXT_INTERRUPTIBLE:
+ kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_INTERRUPTIBLE;
+ break;
+ case LTTNG_EVENT_CONTEXT_PREEMPTIBLE:
+ kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_PREEMPTIBLE;
+ break;
+ case LTTNG_EVENT_CONTEXT_NEED_RESCHEDULE:
+ kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_NEED_RESCHEDULE;
+ break;
+ case LTTNG_EVENT_CONTEXT_MIGRATABLE:
+ kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_MIGRATABLE;
+ break;
+ case LTTNG_EVENT_CONTEXT_CALLSTACK_KERNEL:
+ kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_CALLSTACK_KERNEL;
+ break;
+ case LTTNG_EVENT_CONTEXT_CALLSTACK_USER:
+ kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_CALLSTACK_USER;
+ break;
+ case LTTNG_EVENT_CONTEXT_CGROUP_NS:
+ kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_CGROUP_NS;
+ break;
+ case LTTNG_EVENT_CONTEXT_IPC_NS:
+ kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_IPC_NS;
+ break;
+ case LTTNG_EVENT_CONTEXT_MNT_NS:
+ kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_MNT_NS;
+ break;
+ case LTTNG_EVENT_CONTEXT_NET_NS:
+ kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_NET_NS;
+ break;
+ case LTTNG_EVENT_CONTEXT_PID_NS:
+ kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_PID_NS;
+ break;
+ case LTTNG_EVENT_CONTEXT_TIME_NS:
+ kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_TIME_NS;
+ break;
+ case LTTNG_EVENT_CONTEXT_USER_NS:
+ kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_USER_NS;
+ break;
+ case LTTNG_EVENT_CONTEXT_UTS_NS:
+ kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_UTS_NS;
+ break;
+ case LTTNG_EVENT_CONTEXT_UID:
+ kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_UID;
+ break;
+ case LTTNG_EVENT_CONTEXT_EUID:
+ kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_EUID;
+ break;
+ case LTTNG_EVENT_CONTEXT_SUID:
+ kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_SUID;
+ break;
+ case LTTNG_EVENT_CONTEXT_GID:
+ kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_GID;
+ break;
+ case LTTNG_EVENT_CONTEXT_EGID:
+ kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_EGID;
+ break;
+ case LTTNG_EVENT_CONTEXT_SGID:
+ kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_SGID;
+ break;
+ case LTTNG_EVENT_CONTEXT_VUID:
+ kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_VUID;
+ break;
+ case LTTNG_EVENT_CONTEXT_VEUID:
+ kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_VEUID;
+ break;
+ case LTTNG_EVENT_CONTEXT_VSUID:
+ kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_VSUID;
+ break;
+ case LTTNG_EVENT_CONTEXT_VGID:
+ kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_VGID;
+ break;
+ case LTTNG_EVENT_CONTEXT_VEGID:
+ kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_VEGID;
+ break;
+ case LTTNG_EVENT_CONTEXT_VSGID:
+ kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_VSGID;
+ break;
+ default:
+ ret = LTTNG_ERR_KERN_CONTEXT_FAIL;
+ goto error;
+ }
+
+ kctx->ctx.u.perf_counter.type = ctx->u.perf_counter.type;
+ kctx->ctx.u.perf_counter.config = ctx->u.perf_counter.config;
+ strncpy(kctx->ctx.u.perf_counter.name, ctx->u.perf_counter.name,
+ LTTNG_SYMBOL_NAME_LEN);
+ kctx->ctx.u.perf_counter.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
+
+ if (*channel_name == '\0') {
+ ret = add_kctx_all_channels(ksession, kctx);
+ /* Ownership of kctx is transferred to the callee. */
+ kctx = NULL;
+ if (ret != LTTNG_OK) {
+ goto error;
+ }
+ } else {
+ /* Get kernel channel */
+ kchan = trace_kernel_get_channel_by_name(channel_name, ksession);
+ if (kchan == NULL) {
+ ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND;
+ goto error;
+ }
+
+ ret = add_kctx_to_channel(kctx, kchan);
+ /* Ownership of kctx is transferred to the callee. */
+ kctx = NULL;
+ if (ret != LTTNG_OK) {
+ goto error;
+ }
+ }
+
+ ret = LTTNG_OK;
+
+error:
+ if (kctx) {
+ trace_kernel_destroy_context(kctx);
+ }
+ return ret;
+}
+
+/*
+ * Add UST context to tracer.
+ */
+int context_ust_add(struct ltt_ust_session *usess,
+ enum lttng_domain_type domain,
+ const struct lttng_event_context *ctx,
+ char *channel_name)
+{
+ int ret = LTTNG_OK;
+ struct lttng_ht_iter iter;
+ struct lttng_ht *chan_ht;
+ struct ltt_ust_channel *uchan = NULL;
+
+ LTTNG_ASSERT(usess);
+ LTTNG_ASSERT(ctx);
+ LTTNG_ASSERT(channel_name);
+
+ rcu_read_lock();
+
+ chan_ht = usess->domain_global.channels;
+
+ /* Get UST channel if defined */
+ if (channel_name[0] != '\0') {
+ uchan = trace_ust_find_channel_by_name(chan_ht, channel_name);
+ if (uchan == NULL) {
+ ret = LTTNG_ERR_UST_CHAN_NOT_FOUND;
+ goto error;
+ }
+ }
+
+ if (uchan) {
+ /* Add ctx to channel */
+ ret = add_uctx_to_channel(usess, domain, uchan, ctx);
+ } else {
+ rcu_read_lock();
+ /* Add ctx all events, all channels */
+ cds_lfht_for_each_entry(chan_ht->ht, &iter.iter, uchan, node.node) {
+ ret = add_uctx_to_channel(usess, domain, uchan, ctx);
+ if (ret) {
+ ERR("Failed to add context to channel %s",
+ uchan->name);
+ continue;
+ }
+ }
+ rcu_read_unlock();
+ }
+
+ switch (ret) {
+ case LTTNG_ERR_UST_CONTEXT_EXIST:
+ break;
+ case -ENOMEM:
+ case -LTTNG_ERR_NOMEM:
+ ret = LTTNG_ERR_FATAL;
+ break;
+ case -EINVAL:
+ ret = LTTNG_ERR_UST_CONTEXT_INVAL;
+ break;
+ case -ENOSYS:
+ ret = LTTNG_ERR_UNKNOWN_DOMAIN;
+ break;
+ default:
+ if (ret != 0 && ret != LTTNG_OK) {
+ ret = ret > 0 ? ret : LTTNG_ERR_UNK;
+ } else {
+ ret = LTTNG_OK;
+ }
+ break;
+ }
+
+error:
+ rcu_read_unlock();
+ return ret;
+}
projects / lttng-tools.git / blobdiff