X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Fbin%2Flttng-sessiond%2Fsave.c;h=f0a6e43d55e810ccb332667dfae8de39602af108;hp=2aefae03e2cc66ceb4163bfee4d4948c7095ef76;hb=HEAD;hpb=fefd409b002735b415c5f653cdb2587be454f145 diff --git a/src/bin/lttng-sessiond/save.c b/src/bin/lttng-sessiond/save.c deleted file mode 100644 index 2aefae03e..000000000 --- a/src/bin/lttng-sessiond/save.c +++ /dev/null @@ -1,1660 +0,0 @@ -/* - * Copyright (C) 2014 - Jérémie Galarneau - * - * 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 -#include -#include -#include -#include - -#include -#include -#include -#include -#include -#include - -#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; - case LTTNG_UST_CONTEXT_PERF_THREAD_COUNTER: - context_type_string = config_event_context_perf_thread_counter; - break; - default: - context_type_string = NULL; - break; - } - - 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_context); - if (ret) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } - - if (ctx->ctx == LTTNG_KERNEL_CONTEXT_PERF_CPU_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; - } - -end: - return ret; -} - -static -int save_kernel_contexts(struct config_writer *writer, - struct ltt_kernel_channel *kchan) -{ - int ret; - struct ltt_kernel_context *ctx; - - 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, &kchan->ctx_list, list) { - ret = save_kernel_context(writer, &ctx->ctx); - if (ret) { - 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_contexts(writer, kchan); - 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_agent) -{ - 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_agent ? 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 agent_channel; - - ust_chan = caa_container_of(node, struct ltt_ust_channel, node); - agent_channel = !strcmp(DEFAULT_JUL_CHANNEL_NAME, ust_chan->name); - if (!(save_agent ^ agent_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 && - lttng_ht_get_count(session->ust_session->agents) > 0) { - 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); - memset(config_file_path, 0, sizeof(config_file_path)); - - 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) { - DBG3("Save session in provided path %s", 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); - len += sizeof(DEFAULT_SESSION_CONFIG_FILE_EXTENSION); - config_file_path[len] = '\0'; - - if (!access(config_file_path, F_OK) && !attr->overwrite) { - /* File exists, notify the user since the overwrite flag is off. */ - ret = LTTNG_ERR_SAVE_FILE_EXIST; - 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->active); - 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_unsigned_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; -}