+++ /dev/null
-/*
- * Copyright (C) 2014 - Jérémie Galarneau <jeremie.galarneau@efficios.com>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License, version 2 only, as
- * published by the Free Software Foundation.
- *
- * 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.
- */
-
-#define _GNU_SOURCE
-#include <assert.h>
-#include <inttypes.h>
-#include <string.h>
-#include <urcu/uatomic.h>
-#include <unistd.h>
-
-#include <common/defaults.h>
-#include <common/error.h>
-#include <common/config/config.h>
-#include <common/config/config-session-internal.h>
-#include <common/utils.h>
-#include <common/runas.h>
-#include <lttng/save-internal.h>
-
-#include "save.h"
-#include "session.h"
-#include "trace-ust.h"
-
-static
-int save_kernel_channel_attributes(struct config_writer *writer,
- struct lttng_channel_attr *attr)
-{
- int ret;
-
- ret = config_writer_write_element_string(writer,
- config_element_overwrite_mode,
- attr->overwrite ? config_overwrite_mode_overwrite :
- config_overwrite_mode_discard);
- if (ret) {
- goto end;
- }
-
- ret = config_writer_write_element_unsigned_int(writer,
- config_element_subbuf_size, attr->subbuf_size);
- if (ret) {
- goto end;
- }
-
- ret = config_writer_write_element_unsigned_int(writer,
- config_element_num_subbuf,
- attr->num_subbuf);
- if (ret) {
- goto end;
- }
-
- ret = config_writer_write_element_unsigned_int(writer,
- config_element_switch_timer_interval,
- attr->switch_timer_interval);
- if (ret) {
- goto end;
- }
-
- ret = config_writer_write_element_unsigned_int(writer,
- config_element_read_timer_interval,
- attr->read_timer_interval);
- if (ret) {
- goto end;
- }
-
- ret = config_writer_write_element_string(writer,
- config_element_output_type,
- attr->output == LTTNG_EVENT_SPLICE ?
- config_output_type_splice : config_output_type_mmap);
- if (ret) {
- goto end;
- }
-
- ret = config_writer_write_element_unsigned_int(writer,
- config_element_tracefile_size, attr->tracefile_size);
- if (ret) {
- goto end;
- }
-
- ret = config_writer_write_element_unsigned_int(writer,
- config_element_tracefile_count,
- attr->tracefile_count);
- if (ret) {
- goto end;
- }
-
- ret = config_writer_write_element_unsigned_int(writer,
- config_element_live_timer_interval,
- attr->live_timer_interval);
- if (ret) {
- goto end;
- }
-end:
- return ret ? LTTNG_ERR_SAVE_IO_FAIL : 0;
-}
-
-static
-int save_ust_channel_attributes(struct config_writer *writer,
- struct lttng_ust_channel_attr *attr)
-{
- int ret;
-
- ret = config_writer_write_element_string(writer,
- config_element_overwrite_mode,
- attr->overwrite ? config_overwrite_mode_overwrite :
- config_overwrite_mode_discard);
- if (ret) {
- goto end;
- }
-
- ret = config_writer_write_element_unsigned_int(writer,
- config_element_subbuf_size, attr->subbuf_size);
- if (ret) {
- goto end;
- }
-
- ret = config_writer_write_element_unsigned_int(writer,
- config_element_num_subbuf,
- attr->num_subbuf);
- if (ret) {
- goto end;
- }
-
- ret = config_writer_write_element_unsigned_int(writer,
- config_element_switch_timer_interval,
- attr->switch_timer_interval);
- if (ret) {
- goto end;
- }
-
- ret = config_writer_write_element_unsigned_int(writer,
- config_element_read_timer_interval,
- attr->read_timer_interval);
- if (ret) {
- goto end;
- }
-
- ret = config_writer_write_element_string(writer,
- config_element_output_type,
- attr->output == LTTNG_UST_MMAP ?
- config_output_type_mmap : config_output_type_splice);
- if (ret) {
- goto end;
- }
-end:
- return ret ? LTTNG_ERR_SAVE_IO_FAIL : 0;
-}
-
-static
-const char *get_kernel_instrumentation_string(
- enum lttng_kernel_instrumentation instrumentation)
-{
- const char *instrumentation_string;
-
- switch (instrumentation) {
- case LTTNG_KERNEL_ALL:
- instrumentation_string = config_event_type_all;
- break;
- case LTTNG_KERNEL_TRACEPOINT:
- instrumentation_string = config_event_type_tracepoint;
- break;
- case LTTNG_KERNEL_KPROBE:
- instrumentation_string = config_event_type_kprobe;
- break;
- case LTTNG_KERNEL_FUNCTION:
- instrumentation_string = config_event_type_function;
- break;
- case LTTNG_KERNEL_KRETPROBE:
- instrumentation_string = config_event_type_kretprobe;
- break;
- case LTTNG_KERNEL_NOOP:
- instrumentation_string = config_event_type_noop;
- break;
- case LTTNG_KERNEL_SYSCALL:
- instrumentation_string = config_event_type_syscall;
- break;
- default:
- instrumentation_string = NULL;
- }
-
- return instrumentation_string;
-}
-
-static
-const char *get_kernel_context_type_string(
- enum lttng_kernel_context_type context_type)
-{
- const char *context_type_string;
-
- switch (context_type) {
- case LTTNG_KERNEL_CONTEXT_PID:
- context_type_string = config_event_context_pid;
- break;
- case LTTNG_KERNEL_CONTEXT_PROCNAME:
- context_type_string = config_event_context_procname;
- break;
- case LTTNG_KERNEL_CONTEXT_PRIO:
- context_type_string = config_event_context_prio;
- break;
- case LTTNG_KERNEL_CONTEXT_NICE:
- context_type_string = config_event_context_nice;
- break;
- case LTTNG_KERNEL_CONTEXT_VPID:
- context_type_string = config_event_context_vpid;
- break;
- case LTTNG_KERNEL_CONTEXT_TID:
- context_type_string = config_event_context_tid;
- break;
- case LTTNG_KERNEL_CONTEXT_VTID:
- context_type_string = config_event_context_vtid;
- break;
- case LTTNG_KERNEL_CONTEXT_PPID:
- context_type_string = config_event_context_ppid;
- break;
- case LTTNG_KERNEL_CONTEXT_VPPID:
- context_type_string = config_event_context_vppid;
- break;
- case LTTNG_KERNEL_CONTEXT_HOSTNAME:
- context_type_string = config_event_context_hostname;
- break;
- default:
- context_type_string = NULL;
- }
-
- return context_type_string;
-}
-
-static
-const char *get_ust_context_type_string(
- enum lttng_ust_context_type context_type)
-{
- const char *context_type_string;
-
- switch (context_type) {
- case LTTNG_UST_CONTEXT_PROCNAME:
- context_type_string = config_event_context_procname;
- break;
- case LTTNG_UST_CONTEXT_VPID:
- context_type_string = config_event_context_vpid;
- break;
- case LTTNG_UST_CONTEXT_VTID:
- context_type_string = config_event_context_vtid;
- break;
- case LTTNG_UST_CONTEXT_IP:
- context_type_string = config_event_context_ip;
- break;
- case LTTNG_UST_CONTEXT_PTHREAD_ID:
- context_type_string = config_event_context_pthread_id;
- break;
- default:
- context_type_string = NULL;
- }
-
- return context_type_string;
-}
-
-static
-const char *get_buffer_type_string(
- enum lttng_buffer_type buffer_type)
-{
- const char *buffer_type_string;
-
- switch (buffer_type) {
- case LTTNG_BUFFER_PER_PID:
- buffer_type_string = config_buffer_type_per_pid;
- break;
- case LTTNG_BUFFER_PER_UID:
- buffer_type_string = config_buffer_type_per_uid;
- break;
- case LTTNG_BUFFER_GLOBAL:
- buffer_type_string = config_buffer_type_global;
- break;
- default:
- buffer_type_string = NULL;
- }
-
- return buffer_type_string;
-}
-
-static
-const char *get_loglevel_type_string(
- enum lttng_ust_loglevel_type loglevel_type)
-{
- const char *loglevel_type_string;
-
- switch (loglevel_type) {
- case LTTNG_UST_LOGLEVEL_ALL:
- loglevel_type_string = config_loglevel_type_all;
- break;
- case LTTNG_UST_LOGLEVEL_RANGE:
- loglevel_type_string = config_loglevel_type_range;
- break;
- case LTTNG_UST_LOGLEVEL_SINGLE:
- loglevel_type_string = config_loglevel_type_single;
- break;
- default:
- loglevel_type_string = NULL;
- }
-
- return loglevel_type_string;
-}
-
-static
-int save_kernel_event(struct config_writer *writer,
- struct ltt_kernel_event *event)
-{
- int ret;
- const char *instrumentation_type;
-
- ret = config_writer_open_element(writer, config_element_event);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
-
- if (event->event->name[0]) {
- ret = config_writer_write_element_string(writer,
- config_element_name, event->event->name);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
- }
-
- ret = config_writer_write_element_bool(writer, config_element_enabled,
- event->enabled);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
-
- instrumentation_type = get_kernel_instrumentation_string(
- event->event->instrumentation);
- if (!instrumentation_type) {
- ret = LTTNG_ERR_INVALID;
- goto end;
- }
-
- ret = config_writer_write_element_string(writer, config_element_type,
- instrumentation_type);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
-
- if (event->event->instrumentation == LTTNG_KERNEL_FUNCTION ||
- event->event->instrumentation == LTTNG_KERNEL_KPROBE ||
- event->event->instrumentation == LTTNG_KERNEL_KRETPROBE) {
-
- ret = config_writer_open_element(writer,
- config_element_attributes);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
-
- switch (event->event->instrumentation) {
- case LTTNG_KERNEL_FUNCTION:
- ret = config_writer_open_element(writer,
- config_element_function_attributes);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
-
- ret = config_writer_write_element_string(writer,
- config_element_name,
- event->event->u.ftrace.symbol_name);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
-
- /* /function attributes */
- ret = config_writer_close_element(writer);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
- break;
- case LTTNG_KERNEL_KPROBE:
- case LTTNG_KERNEL_KRETPROBE:
- {
- const char *symbol_name;
- uint64_t addr;
- uint64_t offset;
-
- if (event->event->instrumentation ==
- LTTNG_KERNEL_KPROBE) {
- /*
- * Comments in lttng-kernel.h mention that
- * either addr or symbol_name are set, not both.
- */
- addr = event->event->u.kprobe.addr;
- offset = event->event->u.kprobe.offset;
- symbol_name = addr ? NULL :
- event->event->u.kprobe.symbol_name;
- } else {
- symbol_name =
- event->event->u.kretprobe.symbol_name;
- addr = event->event->u.kretprobe.addr;
- offset = event->event->u.kretprobe.offset;
- }
-
- ret = config_writer_open_element(writer,
- config_element_probe_attributes);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
-
- if (symbol_name) {
- ret = config_writer_write_element_string(writer,
- config_element_symbol_name,
- symbol_name);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
- }
-
- if (addr) {
- ret = config_writer_write_element_unsigned_int(
- writer, config_element_address, addr);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
- }
-
- if (offset) {
- ret = config_writer_write_element_unsigned_int(
- writer, config_element_offset, offset);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
- }
-
- ret = config_writer_close_element(writer);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
- break;
- }
- default:
- ERR("Unsupported kernel instrumentation type.");
- ret = LTTNG_ERR_INVALID;
- goto end;
- }
-
- /* /attributes */
- ret = config_writer_close_element(writer);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
- }
-
- /* /event */
- ret = config_writer_close_element(writer);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
-end:
- return ret;
-}
-
-static
-int save_kernel_events(struct config_writer *writer,
- struct ltt_kernel_event_list *event_list)
-{
- int ret;
- struct ltt_kernel_event *event;
-
- ret = config_writer_open_element(writer, config_element_events);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
-
- cds_list_for_each_entry(event, &event_list->head, list) {
- ret = save_kernel_event(writer, event);
- if (ret) {
- goto end;
- }
- }
-
- /* /events */
- ret = config_writer_close_element(writer);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
-end:
- return ret;
-}
-
-static
-int save_ust_event(struct config_writer *writer,
- struct ltt_ust_event *event)
-{
- int ret;
- const char *loglevel_type_string;
-
- ret = config_writer_open_element(writer, config_element_event);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
-
- if (event->attr.name[0]) {
- ret = config_writer_write_element_string(writer,
- config_element_name, event->attr.name);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
- }
-
- ret = config_writer_write_element_bool(writer, config_element_enabled,
- event->enabled);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
-
- if (event->attr.instrumentation != LTTNG_UST_TRACEPOINT) {
- ERR("Unsupported UST instrumentation type.");
- ret = LTTNG_ERR_INVALID;
- goto end;
- }
- ret = config_writer_write_element_string(writer, config_element_type,
- config_event_type_tracepoint);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
-
- loglevel_type_string = get_loglevel_type_string(
- event->attr.loglevel_type);
- if (!loglevel_type_string) {
- ERR("Unsupported UST loglevel type.");
- ret = LTTNG_ERR_INVALID;
- goto end;
- }
-
- ret = config_writer_write_element_string(writer,
- config_element_loglevel_type, loglevel_type_string);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
-
- ret = config_writer_write_element_signed_int(writer,
- config_element_loglevel, event->attr.loglevel);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
-
- if (event->filter_expression) {
- ret = config_writer_write_element_string(writer,
- config_element_filter, event->filter_expression);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
- }
-
- if (event->exclusion && event->exclusion->count) {
- uint32_t i;
-
- ret = config_writer_open_element(writer,
- config_element_exclusions);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
-
- for (i = 0; i < event->exclusion->count; i++) {
- ret = config_writer_write_element_string(writer,
- config_element_exclusion,
- &event->exclusion->names[0][i]);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
- }
-
- /* /exclusions */
- ret = config_writer_close_element(writer);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
- }
-
- /* /event */
- ret = config_writer_close_element(writer);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
-end:
- return ret;
-}
-
-static
-int save_ust_events(struct config_writer *writer,
- struct lttng_ht *events)
-{
- int ret;
- struct ltt_ust_event *event;
- struct lttng_ht_node_str *node;
- struct lttng_ht_iter iter;
-
- ret = config_writer_open_element(writer, config_element_events);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
-
- rcu_read_lock();
- cds_lfht_for_each_entry(events->ht, &iter.iter, node, node) {
- event = caa_container_of(node, struct ltt_ust_event, node);
-
- ret = save_ust_event(writer, event);
- if (ret) {
- rcu_read_unlock();
- goto end;
- }
- }
- rcu_read_unlock();
-
- /* /events */
- ret = config_writer_close_element(writer);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
-end:
- return ret;
-}
-
-static
-int save_kernel_context(struct config_writer *writer,
- struct lttng_kernel_context *ctx)
-{
- int ret = 0;
-
- if (!ctx) {
- goto end;
- }
-
- ret = config_writer_open_element(writer, config_element_contexts);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
-
- ret = config_writer_open_element(writer, config_element_context);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
-
- if (ctx->ctx == LTTNG_KERNEL_CONTEXT_PERF_COUNTER) {
- ret = config_writer_open_element(writer, config_element_perf);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
-
- ret = config_writer_write_element_unsigned_int(writer,
- config_element_type, ctx->u.perf_counter.type);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
-
- ret = config_writer_write_element_unsigned_int(writer,
- config_element_config, ctx->u.perf_counter.config);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
-
- ret = config_writer_write_element_string(writer,
- config_element_name, ctx->u.perf_counter.name);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
-
- /* /perf */
- ret = config_writer_close_element(writer);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
- } else {
- const char *context_type_string =
- get_kernel_context_type_string(ctx->ctx);
-
- if (!context_type_string) {
- ERR("Unsupported kernel context type.");
- ret = LTTNG_ERR_INVALID;
- goto end;
- }
-
- ret = config_writer_write_element_string(writer,
- config_element_type, context_type_string);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
- }
-
- /* /context */
- ret = config_writer_close_element(writer);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
-
- /* /contexts */
- ret = config_writer_close_element(writer);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
-end:
- return ret;
-}
-
-static
-int save_ust_context(struct config_writer *writer,
- struct cds_list_head *ctx_list)
-{
- int ret;
- struct ltt_ust_context *ctx;
-
- assert(writer);
- assert(ctx_list);
-
- ret = config_writer_open_element(writer, config_element_contexts);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
-
- cds_list_for_each_entry(ctx, ctx_list, list) {
- const char *context_type_string;
-
- context_type_string = get_ust_context_type_string(ctx->ctx.ctx);
- if (!context_type_string) {
- ERR("Unsupported UST context type.")
- ret = LTTNG_ERR_INVALID;
- goto end;
- }
-
- ret = config_writer_open_element(writer,
- config_element_context);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
-
- ret = config_writer_write_element_string(writer,
- config_element_type, context_type_string);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
-
- /* /context */
- ret = config_writer_close_element(writer);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
- }
-
- /* /contexts */
- ret = config_writer_close_element(writer);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
-end:
- return ret;
-}
-
-static
-int save_kernel_channel(struct config_writer *writer,
- struct ltt_kernel_channel *kchan)
-{
- int ret;
-
- assert(writer);
- assert(kchan);
-
- ret = config_writer_open_element(writer, config_element_channel);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
-
- ret = config_writer_write_element_string(writer, config_element_name,
- kchan->channel->name);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
-
- ret = config_writer_write_element_bool(writer, config_element_enabled,
- kchan->channel->enabled);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
-
- ret = save_kernel_channel_attributes(writer, &kchan->channel->attr);
- if (ret) {
- goto end;
- }
-
- ret = save_kernel_events(writer, &kchan->events_list);
- if (ret) {
- goto end;
- }
-
- ret = save_kernel_context(writer, kchan->ctx);
- if (ret) {
- goto end;
- }
-
- /* /channel */
- ret = config_writer_close_element(writer);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
-end:
- return ret;
-}
-
-static
-int save_ust_channel(struct config_writer *writer,
- struct ltt_ust_channel *ust_chan,
- struct ltt_ust_session *session)
-{
- int ret;
-
- assert(writer);
- assert(ust_chan);
- assert(session);
-
- ret = config_writer_open_element(writer, config_element_channel);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
-
- ret = config_writer_write_element_string(writer, config_element_name,
- ust_chan->name);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
-
- ret = config_writer_write_element_bool(writer, config_element_enabled,
- ust_chan->enabled);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
-
- ret = save_ust_channel_attributes(writer, &ust_chan->attr);
- if (ret) {
- goto end;
- }
-
- ret = config_writer_write_element_unsigned_int(writer,
- config_element_tracefile_size, ust_chan->tracefile_size);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
-
- ret = config_writer_write_element_unsigned_int(writer,
- config_element_tracefile_count, ust_chan->tracefile_count);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
-
- ret = config_writer_write_element_unsigned_int(writer,
- config_element_live_timer_interval,
- session->live_timer_interval);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
-
- ret = save_ust_events(writer, ust_chan->events);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
-
- ret = save_ust_context(writer, &ust_chan->ctx_list);
- if (ret) {
- goto end;
- }
-
- /* /channel */
- ret = config_writer_close_element(writer);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
-end:
- return ret;
-}
-
-static
-int save_kernel_session(struct config_writer *writer,
- struct ltt_session *session)
-{
- int ret;
- struct ltt_kernel_channel *kchan;
-
- assert(writer);
- assert(session);
-
- ret = config_writer_write_element_string(writer, config_element_type,
- config_domain_type_kernel);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
-
- ret = config_writer_write_element_string(writer,
- config_element_buffer_type, config_buffer_type_global);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
-
- ret = config_writer_open_element(writer,
- config_element_channels);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
-
- cds_list_for_each_entry(kchan, &session->kernel_session->channel_list.head,
- list) {
- ret = save_kernel_channel(writer, kchan);
- if (ret) {
- goto end;
- }
- }
-
- /* /channels */
- ret = config_writer_close_element(writer);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
-end:
- return ret;
-}
-
-static
-int save_ust_session(struct config_writer *writer,
- struct ltt_session *session, int save_jul)
-{
- int ret;
- struct ltt_ust_channel *ust_chan;
- const char *buffer_type_string;
- struct lttng_ht_node_str *node;
- struct lttng_ht_iter iter;
-
- assert(writer);
- assert(session);
-
- ret = config_writer_write_element_string(writer, config_element_type,
- save_jul ? config_domain_type_jul : config_domain_type_ust);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
-
- buffer_type_string = get_buffer_type_string(
- session->ust_session->buffer_type);
- if (!buffer_type_string) {
- ERR("Unsupported buffer type.");
- ret = LTTNG_ERR_INVALID;
- goto end;
- }
-
- ret = config_writer_write_element_string(writer,
- config_element_buffer_type, buffer_type_string);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
-
- ret = config_writer_open_element(writer, config_element_channels);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
-
- rcu_read_lock();
- cds_lfht_for_each_entry(session->ust_session->domain_global.channels->ht,
- &iter.iter, node, node) {
- int jul_channel;
-
- ust_chan = caa_container_of(node, struct ltt_ust_channel, node);
- jul_channel = !strcmp(DEFAULT_JUL_CHANNEL_NAME, ust_chan->name);
- if (!(save_jul ^ jul_channel)) {
- ret = save_ust_channel(writer, ust_chan, session->ust_session);
- if (ret) {
- rcu_read_unlock();
- goto end;
- }
- }
- }
- rcu_read_unlock();
-
- /* /channels */
- ret = config_writer_close_element(writer);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
-end:
- return ret;
-}
-
-static
-int save_domains(struct config_writer *writer, struct ltt_session *session)
-{
- int ret = 0;
-
- assert(writer);
- assert(session);
-
- if (!session->kernel_session && !session->ust_session) {
- goto end;
- }
-
- ret = config_writer_open_element(writer, config_element_domains);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
-
-
- if (session->kernel_session) {
- ret = config_writer_open_element(writer,
- config_element_domain);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
-
- ret = save_kernel_session(writer, session);
- if (ret) {
- goto end;
- }
-
- /* /domain */
- ret = config_writer_close_element(writer);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
- }
-
- if (session->ust_session) {
- ret = config_writer_open_element(writer,
- config_element_domain);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
-
- ret = save_ust_session(writer, session, 0);
- if (ret) {
- goto end;
- }
-
- /* /domain */
- ret = config_writer_close_element(writer);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
- }
-
- if (session->ust_session &&
- session->ust_session->domain_jul.being_used) {
- ret = config_writer_open_element(writer,
- config_element_domain);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
-
- ret = save_ust_session(writer, session, 1);
- if (ret) {
- goto end;
- }
-
- /* /domain */
- ret = config_writer_close_element(writer);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
- }
-
- /* /domains */
- ret = config_writer_close_element(writer);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
-end:
- return ret;
-}
-
-static
-int save_consumer_output(struct config_writer *writer,
- struct consumer_output *output)
-{
- int ret;
-
- assert(writer);
- assert(output);
-
- ret = config_writer_open_element(writer, config_element_consumer_output);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
-
- ret = config_writer_write_element_bool(writer, config_element_enabled,
- output->enabled);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
-
- ret = config_writer_open_element(writer, config_element_destination);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
-
- switch (output->type) {
- case CONSUMER_DST_LOCAL:
- ret = config_writer_write_element_string(writer,
- config_element_path, output->dst.trace_path);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
- break;
- case CONSUMER_DST_NET:
- {
- char *uri;
-
- uri = zmalloc(PATH_MAX);
- if (!uri) {
- ret = LTTNG_ERR_NOMEM;
- goto end;
- }
-
- ret = config_writer_open_element(writer, config_element_net_output);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end_net_output;
- }
-
- if (output->dst.net.control_isset &&
- output->dst.net.data_isset) {
- ret = uri_to_str_url(&output->dst.net.control, uri, PATH_MAX);
- if (ret < 0) {
- ret = LTTNG_ERR_INVALID;
- goto end_net_output;
- }
-
- ret = config_writer_write_element_string(writer,
- config_element_control_uri, uri);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end_net_output;
- }
-
- ret = uri_to_str_url(&output->dst.net.data, uri, PATH_MAX);
- if (ret < 0) {
- ret = LTTNG_ERR_INVALID;
- goto end_net_output;
- }
-
- ret = config_writer_write_element_string(writer,
- config_element_data_uri, uri);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end_net_output;
- }
-
-end_net_output:
- free(uri);
- if (ret) {
- goto end;
- }
- } else {
- ret = !output->dst.net.control_isset ?
- LTTNG_ERR_URL_CTRL_MISS :
- LTTNG_ERR_URL_DATA_MISS;
- free(uri);
- goto end;
- }
-
- ret = config_writer_close_element(writer);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
- break;
- }
- default:
- ERR("Unsupported consumer output type.");
- ret = LTTNG_ERR_INVALID;
- goto end;
- }
-
- /* /destination */
- ret = config_writer_close_element(writer);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
-
- /* /consumer_output */
- ret = config_writer_close_element(writer);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
-end:
- return ret;
-}
-
-static
-int save_snapshot_outputs(struct config_writer *writer,
- struct snapshot *snapshot)
-{
- int ret;
- struct lttng_ht_iter iter;
- struct snapshot_output *output;
-
- assert(writer);
- assert(snapshot);
-
- ret = config_writer_open_element(writer, config_element_snapshot_outputs);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
-
- rcu_read_lock();
- cds_lfht_for_each_entry(snapshot->output_ht->ht, &iter.iter, output,
- node.node) {
- ret = config_writer_open_element(writer,
- config_element_output);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end_unlock;
- }
-
- ret = config_writer_write_element_string(writer,
- config_element_name, output->name);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end_unlock;
- }
-
- ret = config_writer_write_element_unsigned_int(writer,
- config_element_max_size, output->max_size);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end_unlock;
- }
-
- ret = save_consumer_output(writer, output->consumer);
- if (ret) {
- goto end_unlock;
- }
-
- /* /output */
- ret = config_writer_close_element(writer);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end_unlock;
- }
- }
- rcu_read_unlock();
-
- /* /snapshot_outputs */
- ret = config_writer_close_element(writer);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
-
-end:
- return ret;
-end_unlock:
- rcu_read_unlock();
- return ret;
-}
-
-static
-int save_session_output(struct config_writer *writer,
- struct ltt_session *session)
-{
- int ret;
-
- assert(writer);
- assert(session);
-
- if ((session->snapshot_mode && session->snapshot.nb_output == 0) ||
- (!session->snapshot_mode && !session->consumer)) {
- /* Session is in no output mode */
- ret = 0;
- goto end;
- }
-
- ret = config_writer_open_element(writer, config_element_output);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
-
- if (session->snapshot_mode) {
- ret = save_snapshot_outputs(writer, &session->snapshot);
- if (ret) {
- goto end;
- }
- } else {
- if (session->consumer) {
- ret = save_consumer_output(writer, session->consumer);
- if (ret) {
- goto end;
- }
- }
- }
-
- /* /output */
- ret = config_writer_close_element(writer);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
-end:
- return ret;
-}
-
-/*
- * Save the given session.
- *
- * Return 0 on success else a LTTNG_ERR* code.
- */
-static
-int save_session(struct ltt_session *session,
- struct lttng_save_session_attr *attr, lttng_sock_cred *creds)
-{
- int ret, fd;
- unsigned int file_opened = 0; /* Indicate if the file has been opened */
- char config_file_path[PATH_MAX];
- size_t len;
- struct config_writer *writer = NULL;
- size_t session_name_len;
- const char *provided_path;
-
- assert(session);
- assert(attr);
- assert(creds);
-
- session_name_len = strlen(session->name);
-
- if (!session_access_ok(session,
- LTTNG_SOCK_GET_UID_CRED(creds),
- LTTNG_SOCK_GET_GID_CRED(creds))) {
- ret = LTTNG_ERR_EPERM;
- goto end;
- }
-
- provided_path = lttng_save_session_attr_get_output_url(attr);
- if (provided_path) {
- len = strlen(provided_path);
- if (len >= sizeof(config_file_path)) {
- ret = LTTNG_ERR_SET_URL;
- goto end;
- }
- strncpy(config_file_path, provided_path, len);
- } else {
- ssize_t ret_len;
- char *home_dir = utils_get_user_home_dir(
- LTTNG_SOCK_GET_UID_CRED(creds));
- if (!home_dir) {
- ret = LTTNG_ERR_SET_URL;
- goto end;
- }
-
- ret_len = snprintf(config_file_path, sizeof(config_file_path),
- DEFAULT_SESSION_HOME_CONFIGPATH, home_dir);
- free(home_dir);
- if (ret_len < 0) {
- PERROR("snprintf save session");
- ret = LTTNG_ERR_SET_URL;
- goto end;
- }
- len = ret_len;
- }
-
- /*
- * Check the path fits in the config file path dst including the '/'
- * followed by trailing .lttng extension and the NULL terminated string.
- */
- if ((len + session_name_len + 2 +
- sizeof(DEFAULT_SESSION_CONFIG_FILE_EXTENSION))
- > sizeof(config_file_path)) {
- ret = LTTNG_ERR_SET_URL;
- goto end;
- }
-
- ret = run_as_mkdir_recursive(config_file_path, S_IRWXU | S_IRWXG,
- LTTNG_SOCK_GET_UID_CRED(creds), LTTNG_SOCK_GET_GID_CRED(creds));
- if (ret) {
- ret = LTTNG_ERR_SET_URL;
- goto end;
- }
-
- /*
- * At this point, we know that everything fits in the buffer. Validation
- * was done just above.
- */
- config_file_path[len++] = '/';
- strncpy(config_file_path + len, session->name, session_name_len);
- len += session_name_len;
- strcpy(config_file_path + len, DEFAULT_SESSION_CONFIG_FILE_EXTENSION);
-
- if (!access(config_file_path, F_OK) && !attr->overwrite) {
- /* A file with the same name already exists, skip */
- goto end;
- }
-
- fd = run_as_open(config_file_path, O_CREAT | O_WRONLY | O_TRUNC,
- S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP,
- LTTNG_SOCK_GET_UID_CRED(creds), LTTNG_SOCK_GET_GID_CRED(creds));
- if (fd < 0) {
- PERROR("Could not create configuration file");
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
- file_opened = 1;
-
- writer = config_writer_create(fd);
- if (!writer) {
- ret = LTTNG_ERR_NOMEM;
- goto end;
- }
-
- ret = config_writer_open_element(writer, config_element_sessions);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
-
- ret = config_writer_open_element(writer, config_element_session);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
-
- ret = config_writer_write_element_string(writer, config_element_name,
- session->name);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
-
- ret = save_domains(writer, session);
- if (ret) {
- goto end;
- }
-
- ret = config_writer_write_element_bool(writer, config_element_started,
- session->enabled);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
-
- if (session->snapshot_mode || session->live_timer) {
- ret = config_writer_open_element(writer, config_element_attributes);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
-
- if (session->snapshot_mode) {
- ret = config_writer_write_element_bool(writer,
- config_element_snapshot_mode, 1);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
- } else {
- ret = config_writer_write_element_signed_int(writer,
- config_element_live_timer_interval, session->live_timer);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
- }
-
- /* /attributes */
- ret = config_writer_close_element(writer);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
- }
-
- ret = save_session_output(writer, session);
- if (ret) {
- goto end;
- }
-
- /* /session */
- ret = config_writer_close_element(writer);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
-
- /* /sessions */
- ret = config_writer_close_element(writer);
- if (ret) {
- ret = LTTNG_ERR_SAVE_IO_FAIL;
- goto end;
- }
-end:
- if (writer && config_writer_destroy(writer)) {
- /* Preserve the original error code */
- ret = ret ? ret : LTTNG_ERR_SAVE_IO_FAIL;
- }
- if (ret) {
- /* Delete file in case of error */
- if (file_opened && unlink(config_file_path)) {
- PERROR("Unlinking XML session configuration.");
- }
- }
-
- return ret;
-}
-
-int cmd_save_sessions(struct lttng_save_session_attr *attr,
- lttng_sock_cred *creds)
-{
- int ret;
- const char *session_name;
- struct ltt_session *session;
-
- session_lock_list();
-
- session_name = lttng_save_session_attr_get_session_name(attr);
- if (session_name) {
- session = session_find_by_name(session_name);
- if (!session) {
- ret = LTTNG_ERR_SESS_NOT_FOUND;
- goto end;
- }
-
- session_lock(session);
- ret = save_session(session, attr, creds);
- session_unlock(session);
- if (ret) {
- goto end;
- }
- } else {
- struct ltt_session_list *list = session_get_list();
-
- cds_list_for_each_entry(session, &list->head, list) {
- session_lock(session);
- ret = save_session(session, attr, creds);
- session_unlock(session);
-
- /* Don't abort if we don't have the required permissions. */
- if (ret && ret != LTTNG_ERR_EPERM) {
- goto end;
- }
- }
- }
- ret = LTTNG_OK;
-
-end:
- session_unlock_list();
- return ret;
-}
projects / lttng-tools.git / blobdiff