X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Fbin%2Flttng-sessiond%2Fsave.c;h=f0a6e43d55e810ccb332667dfae8de39602af108;hp=c3ae627915e3e8994ceb32333ab5a16f56a12212;hb=HEAD;hpb=159b042f34366d0fde5dcd73b4231c558922a664 diff --git a/src/bin/lttng-sessiond/save.c b/src/bin/lttng-sessiond/save.c deleted file mode 100644 index c3ae62791..000000000 --- a/src/bin/lttng-sessiond/save.c +++ /dev/null @@ -1,2907 +0,0 @@ -/* - * Copyright (C) 2014 Jérémie Galarneau - * - * SPDX-License-Identifier: GPL-2.0-only - * - */ - -#define _LGPL_SOURCE -#include -#include -#include -#include -#include - -#include -#include -#include -#include -#include -#include - -#include "kernel.h" -#include "save.h" -#include "session.h" -#include "lttng-syscall.h" -#include "trace-ust.h" -#include "agent.h" - -/* Return LTTNG_OK on success else a LTTNG_ERR* code. */ -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) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } - - ret = config_writer_write_element_unsigned_int(writer, - config_element_subbuf_size, attr->subbuf_size); - if (ret) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } - - ret = config_writer_write_element_unsigned_int(writer, - config_element_num_subbuf, - attr->num_subbuf); - if (ret) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } - - ret = config_writer_write_element_unsigned_int(writer, - config_element_switch_timer_interval, - attr->switch_timer_interval); - if (ret) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } - - ret = config_writer_write_element_unsigned_int(writer, - config_element_read_timer_interval, - attr->read_timer_interval); - if (ret) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - 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) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } - - ret = config_writer_write_element_unsigned_int(writer, - config_element_tracefile_size, attr->tracefile_size); - if (ret) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } - - ret = config_writer_write_element_unsigned_int(writer, - config_element_tracefile_count, - attr->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, - attr->live_timer_interval); - if (ret) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } - - if (attr->extended.ptr) { - struct lttng_channel_extended *ext = NULL; - - ext = (struct lttng_channel_extended *) attr->extended.ptr; - ret = config_writer_write_element_unsigned_int(writer, - config_element_monitor_timer_interval, - ext->monitor_timer_interval); - if (ret) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } - - ret = config_writer_write_element_signed_int(writer, - config_element_blocking_timeout, - ext->blocking_timeout); - if (ret) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } - } - - ret = LTTNG_OK; -end: - return ret; -} - -/* Return LTTNG_OK on success else a LTTNG_ERR* code. */ -static -int save_ust_channel_attributes(struct config_writer *writer, - struct lttng_ust_channel_attr *attr) -{ - int ret; - struct ltt_ust_channel *channel = NULL; - - ret = config_writer_write_element_string(writer, - config_element_overwrite_mode, - attr->overwrite ? config_overwrite_mode_overwrite : - config_overwrite_mode_discard); - if (ret) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } - - ret = config_writer_write_element_unsigned_int(writer, - config_element_subbuf_size, attr->subbuf_size); - if (ret) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } - - ret = config_writer_write_element_unsigned_int(writer, - config_element_num_subbuf, - attr->num_subbuf); - if (ret) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } - - ret = config_writer_write_element_unsigned_int(writer, - config_element_switch_timer_interval, - attr->switch_timer_interval); - if (ret) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } - - ret = config_writer_write_element_unsigned_int(writer, - config_element_read_timer_interval, - attr->read_timer_interval); - if (ret) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - 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) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } - - ret = config_writer_write_element_signed_int(writer, - config_element_blocking_timeout, - attr->u.s.blocking_timeout); - if (ret) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } - - /* - * Fetch the monitor timer which is located in the parent of - * lttng_ust_channel_attr - */ - channel = caa_container_of(attr, struct ltt_ust_channel, attr); - ret = config_writer_write_element_unsigned_int(writer, - config_element_monitor_timer_interval, - channel->monitor_timer_interval); - if (ret) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } - - ret = LTTNG_OK; -end: - return ret; -} - -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_probe; - break; - case LTTNG_KERNEL_UPROBE: - instrumentation_string = config_event_type_userspace_probe; - break; - case LTTNG_KERNEL_FUNCTION: - instrumentation_string = config_event_type_function_entry; - break; - case LTTNG_KERNEL_KRETPROBE: - instrumentation_string = config_event_type_function; - 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; - case LTTNG_KERNEL_CONTEXT_INTERRUPTIBLE: - context_type_string = config_event_context_interruptible; - break; - case LTTNG_KERNEL_CONTEXT_PREEMPTIBLE: - context_type_string = config_event_context_preemptible; - break; - case LTTNG_KERNEL_CONTEXT_NEED_RESCHEDULE: - context_type_string = config_event_context_need_reschedule; - break; - case LTTNG_KERNEL_CONTEXT_MIGRATABLE: - context_type_string = config_event_context_migratable; - break; - case LTTNG_KERNEL_CONTEXT_CALLSTACK_USER: - context_type_string = config_event_context_callstack_user; - break; - case LTTNG_KERNEL_CONTEXT_CALLSTACK_KERNEL: - context_type_string = config_event_context_callstack_kernel; - break; - case LTTNG_KERNEL_CONTEXT_CGROUP_NS: - context_type_string = config_event_context_cgroup_ns; - break; - case LTTNG_KERNEL_CONTEXT_IPC_NS: - context_type_string = config_event_context_ipc_ns; - break; - case LTTNG_KERNEL_CONTEXT_MNT_NS: - context_type_string = config_event_context_mnt_ns; - break; - case LTTNG_KERNEL_CONTEXT_NET_NS: - context_type_string = config_event_context_net_ns; - break; - case LTTNG_KERNEL_CONTEXT_PID_NS: - context_type_string = config_event_context_pid_ns; - break; - case LTTNG_KERNEL_CONTEXT_USER_NS: - context_type_string = config_event_context_user_ns; - break; - case LTTNG_KERNEL_CONTEXT_UTS_NS: - context_type_string = config_event_context_uts_ns; - break; - case LTTNG_KERNEL_CONTEXT_UID: - context_type_string = config_event_context_uid; - break; - case LTTNG_KERNEL_CONTEXT_EUID: - context_type_string = config_event_context_euid; - break; - case LTTNG_KERNEL_CONTEXT_SUID: - context_type_string = config_event_context_suid; - break; - case LTTNG_KERNEL_CONTEXT_GID: - context_type_string = config_event_context_gid; - break; - case LTTNG_KERNEL_CONTEXT_EGID: - context_type_string = config_event_context_egid; - break; - case LTTNG_KERNEL_CONTEXT_SGID: - context_type_string = config_event_context_sgid; - break; - case LTTNG_KERNEL_CONTEXT_VUID: - context_type_string = config_event_context_vuid; - break; - case LTTNG_KERNEL_CONTEXT_VEUID: - context_type_string = config_event_context_veuid; - break; - case LTTNG_KERNEL_CONTEXT_VSUID: - context_type_string = config_event_context_vsuid; - break; - case LTTNG_KERNEL_CONTEXT_VGID: - context_type_string = config_event_context_vgid; - break; - case LTTNG_KERNEL_CONTEXT_VEGID: - context_type_string = config_event_context_vegid; - break; - case LTTNG_KERNEL_CONTEXT_VSGID: - context_type_string = config_event_context_vsgid; - 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_APP_CONTEXT: - context_type_string = config_event_context_app; - break; - case LTTNG_UST_CONTEXT_CGROUP_NS: - context_type_string = config_event_context_cgroup_ns; - break; - case LTTNG_UST_CONTEXT_IPC_NS: - context_type_string = config_event_context_ipc_ns; - break; - case LTTNG_UST_CONTEXT_MNT_NS: - context_type_string = config_event_context_mnt_ns; - break; - case LTTNG_UST_CONTEXT_NET_NS: - context_type_string = config_event_context_net_ns; - break; - case LTTNG_UST_CONTEXT_PID_NS: - context_type_string = config_event_context_pid_ns; - break; - case LTTNG_UST_CONTEXT_USER_NS: - context_type_string = config_event_context_user_ns; - break; - case LTTNG_UST_CONTEXT_UTS_NS: - context_type_string = config_event_context_uts_ns; - break; - case LTTNG_UST_CONTEXT_VUID: - context_type_string = config_event_context_vuid; - break; - case LTTNG_UST_CONTEXT_VEUID: - context_type_string = config_event_context_veuid; - break; - case LTTNG_UST_CONTEXT_VSUID: - context_type_string = config_event_context_vsuid; - break; - case LTTNG_UST_CONTEXT_VGID: - context_type_string = config_event_context_vgid; - break; - case LTTNG_UST_CONTEXT_VEGID: - context_type_string = config_event_context_vegid; - break; - case LTTNG_UST_CONTEXT_VSGID: - context_type_string = config_event_context_vsgid; - break; - case LTTNG_UST_CONTEXT_PERF_THREAD_COUNTER: - /* - * Error, should not be stored in the XML, perf contexts - * are stored as a node of type event_perf_context_type. - */ - 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; -} - -/* Return LTTNG_OK on success else a LTTNG_ERR* code. */ -static -int save_kernel_function_event(struct config_writer *writer, - struct ltt_kernel_event *event) -{ - int ret; - - 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; - } -end: - return ret; -} - -static -int save_kernel_kprobe_event(struct config_writer *writer, - struct ltt_kernel_event *event) -{ - int ret; - const char *symbol_name; - uint64_t addr; - uint64_t offset; - - switch (event->event->instrumentation) { - case 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; - break; - case LTTNG_KERNEL_KRETPROBE: - addr = event->event->u.kretprobe.addr; - offset = event->event->u.kretprobe.offset; - symbol_name = addr ? NULL : event->event->u.kretprobe.symbol_name; - break; - default: - assert(1); - ERR("Unsupported kernel instrumentation type."); - ret = LTTNG_ERR_INVALID; - goto end; - } - - ret = config_writer_open_element(writer, config_element_probe_attributes); - 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; - } - } else 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 the offset is non-zero, write it.*/ - if (offset) { - ret = config_writer_write_element_unsigned_int(writer, - config_element_offset, offset); - if (ret) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } - } - } else { - /* - * This really should not happen as we are either setting the - * address or the symbol above. - */ - ERR("Invalid probe/function description."); - ret = LTTNG_ERR_INVALID; - goto end; - } - - - ret = config_writer_close_element(writer); - if (ret) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } -end: - return ret; -} - -/* - * Save the userspace probe tracepoint event associated with the event to the - * config writer. - */ -static -int save_kernel_userspace_probe_tracepoint_event(struct config_writer *writer, - struct ltt_kernel_event *event) -{ - int ret = 0; - const char *probe_name, *provider_name, *binary_path; - const struct lttng_userspace_probe_location *userspace_probe_location; - const struct lttng_userspace_probe_location_lookup_method *lookup_method; - enum lttng_userspace_probe_location_lookup_method_type lookup_type; - - /* Get userspace probe location from the event. */ - userspace_probe_location = event->userspace_probe_location; - if (!userspace_probe_location) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } - - /* Get lookup method and lookup method type. */ - lookup_method = lttng_userspace_probe_location_get_lookup_method(userspace_probe_location); - if (!lookup_method) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } - - lookup_type = lttng_userspace_probe_location_lookup_method_get_type(lookup_method); - - /* Get the binary path, probe name and provider name. */ - binary_path = - lttng_userspace_probe_location_tracepoint_get_binary_path( - userspace_probe_location); - if (!binary_path) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } - - probe_name = - lttng_userspace_probe_location_tracepoint_get_probe_name( - userspace_probe_location); - if (!probe_name) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } - - provider_name = - lttng_userspace_probe_location_tracepoint_get_provider_name( - userspace_probe_location); - if (!provider_name) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } - - /* Open a userspace probe tracepoint attribute. */ - ret = config_writer_open_element(writer, config_element_userspace_probe_tracepoint_attributes); - if (ret) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } - - switch (lookup_type) { - case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT: - ret = config_writer_write_element_string(writer, - config_element_userspace_probe_lookup, - config_element_userspace_probe_lookup_tracepoint_sdt); - if (ret) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } - break; - default: - ERR("Unsupported kernel userspace probe tracepoint lookup method."); - ret = LTTNG_ERR_INVALID; - goto end; - } - - /* Write the binary path, provider name and the probe name. */ - ret = config_writer_write_element_string(writer, - config_element_userspace_probe_location_binary_path, - binary_path); - if (ret) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } - - ret = config_writer_write_element_string(writer, - config_element_userspace_probe_tracepoint_location_provider_name, - provider_name); - if (ret) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } - - ret = config_writer_write_element_string(writer, - config_element_userspace_probe_tracepoint_location_probe_name, - probe_name); - if (ret) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } - - /* Close the userspace probe tracepoint attribute. */ - ret = config_writer_close_element(writer); - if (ret) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } - -end: - return ret; -} - -/* - * Save the userspace probe function event associated with the event to the - * config writer. - */ -static -int save_kernel_userspace_probe_function_event(struct config_writer *writer, - struct ltt_kernel_event *event) -{ - int ret = 0; - const char *function_name, *binary_path; - const struct lttng_userspace_probe_location *userspace_probe_location; - const struct lttng_userspace_probe_location_lookup_method *lookup_method; - enum lttng_userspace_probe_location_lookup_method_type lookup_type; - - /* Get userspace probe location from the event. */ - userspace_probe_location = event->userspace_probe_location; - if (!userspace_probe_location) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } - - /* Get lookup method and lookup method type. */ - lookup_method = lttng_userspace_probe_location_get_lookup_method( - userspace_probe_location); - if (!lookup_method) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } - - /* Get the binary path and the function name. */ - binary_path = - lttng_userspace_probe_location_function_get_binary_path( - userspace_probe_location); - if (!binary_path) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } - - function_name = - lttng_userspace_probe_location_function_get_function_name( - userspace_probe_location); - if (!function_name) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } - - /* Open a userspace probe function attribute. */ - ret = config_writer_open_element(writer, - config_element_userspace_probe_function_attributes); - if (ret) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } - - lookup_type = lttng_userspace_probe_location_lookup_method_get_type(lookup_method); - switch (lookup_type) { - case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF: - ret = config_writer_write_element_string(writer, - config_element_userspace_probe_lookup, - config_element_userspace_probe_lookup_function_elf); - if (ret) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } - break; - case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_DEFAULT: - ret = config_writer_write_element_string(writer, - config_element_userspace_probe_lookup, - config_element_userspace_probe_lookup_function_default); - if (ret) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } - break; - default: - ERR("Unsupported kernel userspace probe function lookup method."); - ret = LTTNG_ERR_INVALID; - goto end; - } - - /* Write the binary path and the function name. */ - ret = config_writer_write_element_string(writer, - config_element_userspace_probe_location_binary_path, - binary_path); - if (ret) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } - - ret = config_writer_write_element_string(writer, - config_element_userspace_probe_function_location_function_name, - function_name); - if (ret) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } - - /* Close the userspace probe function attribute. */ - ret = config_writer_close_element(writer); - if (ret) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } - -end: - return ret; -} - -static -int save_kernel_userspace_probe_event(struct config_writer *writer, - struct ltt_kernel_event *event) -{ - int ret; - struct lttng_userspace_probe_location *userspace_probe_location; - - /* Get userspace probe location from the event. */ - userspace_probe_location = event->userspace_probe_location; - if (!userspace_probe_location) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } - - switch(lttng_userspace_probe_location_get_type(userspace_probe_location)) { - case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION: - { - ret = save_kernel_userspace_probe_function_event(writer, event); - if (ret) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } - break; - } - case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT: - { - ret = save_kernel_userspace_probe_tracepoint_event(writer, event); - if (ret) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } - break; - } - case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_UNKNOWN: - default: - ERR("Unsupported kernel userspace probe location type."); - ret = LTTNG_ERR_INVALID; - goto end; - } - -end: - return ret; -} - -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->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->event->instrumentation == LTTNG_KERNEL_FUNCTION || - event->event->instrumentation == LTTNG_KERNEL_KPROBE || - event->event->instrumentation == LTTNG_KERNEL_UPROBE || - 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_SYSCALL: - case LTTNG_KERNEL_FUNCTION: - ret = save_kernel_function_event(writer, event); - if (ret) { - goto end; - } - break; - case LTTNG_KERNEL_KPROBE: - case LTTNG_KERNEL_KRETPROBE: - ret = save_kernel_kprobe_event(writer, event); - if (ret) { - goto end; - } - break; - case LTTNG_KERNEL_UPROBE: - ret = save_kernel_userspace_probe_event(writer, event); - if (ret) { - 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; - } - - ret = LTTNG_OK; -end: - return ret; -} - -/* Return LTTNG_OK on success else a LTTNG_ERR* code. */ -static -int save_kernel_events(struct config_writer *writer, - struct ltt_kernel_channel *kchan) -{ - 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, &kchan->events_list.head, list) { - ret = save_kernel_event(writer, event); - if (ret != LTTNG_OK) { - goto end; - } - } - - /* /events */ - ret = config_writer_close_element(writer); - if (ret) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } - - ret = LTTNG_OK; -end: - return ret; -} - -/* Return LTTNG_OK on success else a LTTNG_ERR* code. */ -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; - } - - /* The log level is irrelevant if no "filtering" is enabled */ - if (event->attr.loglevel_type != LTTNG_UST_LOGLEVEL_ALL) { - 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, - LTTNG_EVENT_EXCLUSION_NAME_AT( - event->exclusion, 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; - } - - ret = LTTNG_OK; -end: - return ret; -} - -/* Return LTTNG_OK on success else a LTTNG_ERR* code. */ -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); - - if (event->internal) { - /* Internal events must not be exposed to clients */ - continue; - } - ret = save_ust_event(writer, event); - if (ret != LTTNG_OK) { - 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; - } - - ret = LTTNG_OK; -end: - return ret; -} - -/* Return LTTNG_OK on success else a LTTNG_ERR* code. */ -static -int init_ust_event_from_agent_event(struct ltt_ust_event *ust_event, - struct agent_event *agent_event) -{ - int ret; - enum lttng_ust_loglevel_type ust_loglevel_type; - - ust_event->enabled = agent_event->enabled; - ust_event->attr.instrumentation = LTTNG_UST_TRACEPOINT; - if (lttng_strncpy(ust_event->attr.name, agent_event->name, - LTTNG_SYMBOL_NAME_LEN)) { - ret = LTTNG_ERR_INVALID; - goto end; - } - switch (agent_event->loglevel_type) { - case LTTNG_EVENT_LOGLEVEL_ALL: - ust_loglevel_type = LTTNG_UST_LOGLEVEL_ALL; - break; - case LTTNG_EVENT_LOGLEVEL_SINGLE: - ust_loglevel_type = LTTNG_UST_LOGLEVEL_SINGLE; - break; - case LTTNG_EVENT_LOGLEVEL_RANGE: - ust_loglevel_type = LTTNG_UST_LOGLEVEL_RANGE; - break; - default: - ERR("Invalid agent_event loglevel_type."); - ret = LTTNG_ERR_INVALID; - goto end; - } - - ust_event->attr.loglevel_type = ust_loglevel_type; - ust_event->attr.loglevel = agent_event->loglevel_value; - ust_event->filter_expression = agent_event->filter_expression; - ust_event->exclusion = agent_event->exclusion; - - ret = LTTNG_OK; -end: - return ret; -} - -/* Return LTTNG_OK on success else a LTTNG_ERR* code. */ -static -int save_agent_events(struct config_writer *writer, - struct agent *agent) -{ - int ret; - struct lttng_ht_iter iter; - struct lttng_ht_node_str *node; - - 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(agent->events->ht, &iter.iter, node, node) { - int ret; - struct agent_event *agent_event; - struct ltt_ust_event fake_event; - - memset(&fake_event, 0, sizeof(fake_event)); - agent_event = caa_container_of(node, struct agent_event, node); - - /* - * Initialize a fake ust event to reuse the same serialization - * function since UST and agent events contain the same info - * (and one could wonder why they don't reuse the same - * structures...). - */ - ret = init_ust_event_from_agent_event(&fake_event, agent_event); - if (ret != LTTNG_OK) { - rcu_read_unlock(); - goto end; - } - ret = save_ust_event(writer, &fake_event); - if (ret != LTTNG_OK) { - 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; - } - - ret = LTTNG_OK; -end: - return ret; -} - -/* Return LTTNG_OK on success else a LTTNG_ERR* code. */ -static -int save_kernel_context(struct config_writer *writer, - struct lttng_kernel_context *ctx) -{ - int ret = LTTNG_OK; - - 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_context_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; - } - - ret = LTTNG_OK; -end: - return ret; -} - -/* Return LTTNG_OK on success else a LTTNG_ERR* code. */ -static -int save_kernel_contexts(struct config_writer *writer, - struct ltt_kernel_channel *kchan) -{ - int ret; - struct ltt_kernel_context *ctx; - - if (cds_list_empty(&kchan->ctx_list)) { - ret = LTTNG_OK; - goto end; - } - - 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 != LTTNG_OK) { - goto end; - } - } - - /* /contexts */ - ret = config_writer_close_element(writer); - if (ret) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } - - ret = LTTNG_OK; -end: - return ret; -} - -/* Return LTTNG_OK on success else a LTTNG_ERR* code. */ -static -int save_ust_context_perf_thread_counter(struct config_writer *writer, - struct ltt_ust_context *ctx) -{ - int ret; - - assert(writer); - assert(ctx); - - /* Perf contexts are saved as event_perf_context_type */ - ret = config_writer_open_element(writer, config_element_context_perf); - if (ret) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } - - ret = config_writer_write_element_unsigned_int(writer, - config_element_type, ctx->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->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->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; - } - - ret = LTTNG_OK; -end: - return ret; -} - -/* Return LTTNG_OK on success else a LTTNG_ERR* code. */ -static -int save_ust_context_app_ctx(struct config_writer *writer, - struct ltt_ust_context *ctx) -{ - int ret; - - assert(writer); - assert(ctx); - - /* Application contexts are saved as application_context_type */ - ret = config_writer_open_element(writer, config_element_context_app); - if (ret) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } - - ret = config_writer_write_element_string(writer, - config_element_context_app_provider_name, - ctx->ctx.u.app_ctx.provider_name); - if (ret) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } - - ret = config_writer_write_element_string(writer, - config_element_context_app_ctx_name, - ctx->ctx.u.app_ctx.ctx_name); - if (ret) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } - - /* /app */ - ret = config_writer_close_element(writer); - if (ret) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } - - ret = LTTNG_OK; -end: - return ret; -} - -/* Return LTTNG_OK on success else a LTTNG_ERR* code. */ -static -int save_ust_context_generic(struct config_writer *writer, - struct ltt_ust_context *ctx) -{ - int ret; - const char *context_type_string; - - assert(writer); - assert(ctx); - - /* Save context as event_context_type_type */ - context_type_string = get_ust_context_type_string( - ctx->ctx.ctx); - if (!context_type_string) { - ERR("Unsupported UST context type."); - 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; - } - - ret = LTTNG_OK; -end: - return ret; -} - -/* Return LTTNG_OK on success else a LTTNG_ERR* code. */ -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) { - ret = config_writer_open_element(writer, - config_element_context); - if (ret) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } - - switch (ctx->ctx.ctx) { - case LTTNG_UST_CONTEXT_PERF_THREAD_COUNTER: - ret = save_ust_context_perf_thread_counter(writer, ctx); - break; - case LTTNG_UST_CONTEXT_APP_CONTEXT: - ret = save_ust_context_app_ctx(writer, ctx); - break; - default: - /* Save generic context. */ - ret = save_ust_context_generic(writer, ctx); - } - if (ret != LTTNG_OK) { - 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; - } - - ret = LTTNG_OK; -end: - return ret; -} - -/* Return LTTNG_OK on success else a LTTNG_ERR* code. */ -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 != LTTNG_OK) { - goto end; - } - - ret = save_kernel_events(writer, kchan); - if (ret != LTTNG_OK) { - goto end; - } - - ret = save_kernel_contexts(writer, kchan); - if (ret != LTTNG_OK) { - goto end; - } - - /* /channel */ - ret = config_writer_close_element(writer); - if (ret) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } - - ret = LTTNG_OK; -end: - return ret; -} - -/* Return LTTNG_OK on success else a LTTNG_ERR* code. */ -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 != LTTNG_OK) { - 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; - } - - if (ust_chan->domain == LTTNG_DOMAIN_UST) { - ret = save_ust_events(writer, ust_chan->events); - if (ret != LTTNG_OK) { - goto end; - } - } else { - struct agent *agent = NULL; - - agent = trace_ust_find_agent(session, ust_chan->domain); - if (!agent) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - ERR("Could not find agent associated to UST subdomain"); - goto end; - } - - /* - * Channels associated with a UST sub-domain (such as JUL, Log4j - * or Python) don't have any non-internal events. We retrieve - * the "agent" events associated with this channel and serialize - * them. - */ - ret = save_agent_events(writer, agent); - if (ret != LTTNG_OK) { - goto end; - } - } - - ret = save_ust_context(writer, &ust_chan->ctx_list); - if (ret != LTTNG_OK) { - goto end; - } - - /* /channel */ - ret = config_writer_close_element(writer); - if (ret) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } - - ret = LTTNG_OK; -end: - return ret; -} - -/* Return LTTNG_OK on success else a LTTNG_ERR* code. */ -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 != LTTNG_OK) { - goto end; - } - } - - /* /channels */ - ret = config_writer_close_element(writer); - if (ret) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } - - ret = LTTNG_OK; -end: - return ret; -} - -static -const char *get_config_domain_str(enum lttng_domain_type domain) -{ - const char *str_dom; - - switch (domain) { - case LTTNG_DOMAIN_KERNEL: - str_dom = config_domain_type_kernel; - break; - case LTTNG_DOMAIN_UST: - str_dom = config_domain_type_ust; - break; - case LTTNG_DOMAIN_JUL: - str_dom = config_domain_type_jul; - break; - case LTTNG_DOMAIN_LOG4J: - str_dom = config_domain_type_log4j; - break; - case LTTNG_DOMAIN_PYTHON: - str_dom = config_domain_type_python; - break; - default: - assert(0); - } - - return str_dom; -} - -/* Return LTTNG_OK on success else a LTTNG_ERR* code. */ -static int save_process_attr_tracker(struct config_writer *writer, - struct ltt_session *sess, - int domain, - enum lttng_process_attr process_attr) -{ - int ret = LTTNG_OK; - const char *element_id_tracker, *element_target_id, *element_id; - const struct process_attr_tracker *tracker; - enum lttng_tracking_policy tracking_policy; - struct lttng_process_attr_values *values = NULL; - - switch (process_attr) { - case LTTNG_PROCESS_ATTR_PROCESS_ID: - element_id_tracker = config_element_process_attr_tracker_pid; - element_target_id = config_element_process_attr_pid_value; - element_id = config_element_process_attr_id; - break; - case LTTNG_PROCESS_ATTR_VIRTUAL_PROCESS_ID: - element_id_tracker = config_element_process_attr_tracker_vpid; - element_target_id = config_element_process_attr_vpid_value; - element_id = config_element_process_attr_id; - break; - case LTTNG_PROCESS_ATTR_USER_ID: - element_id_tracker = config_element_process_attr_tracker_uid; - element_target_id = config_element_process_attr_uid_value; - element_id = config_element_process_attr_id; - break; - case LTTNG_PROCESS_ATTR_VIRTUAL_USER_ID: - element_id_tracker = config_element_process_attr_tracker_vuid; - element_target_id = config_element_process_attr_vuid_value; - element_id = config_element_process_attr_id; - break; - case LTTNG_PROCESS_ATTR_GROUP_ID: - element_id_tracker = config_element_process_attr_tracker_gid; - element_target_id = config_element_process_attr_gid_value; - element_id = config_element_process_attr_id; - break; - case LTTNG_PROCESS_ATTR_VIRTUAL_GROUP_ID: - element_id_tracker = config_element_process_attr_tracker_vgid; - element_target_id = config_element_process_attr_vgid_value; - element_id = config_element_process_attr_id; - break; - default: - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } - - switch (domain) { - case LTTNG_DOMAIN_KERNEL: - { - tracker = kernel_get_process_attr_tracker( - sess->kernel_session, process_attr); - assert(tracker); - break; - } - case LTTNG_DOMAIN_UST: - { - tracker = trace_ust_get_process_attr_tracker( - sess->ust_session, process_attr); - assert(tracker); - break; - } - case LTTNG_DOMAIN_JUL: - case LTTNG_DOMAIN_LOG4J: - case LTTNG_DOMAIN_PYTHON: - default: - ret = LTTNG_ERR_UNSUPPORTED_DOMAIN; - goto end; - } - - tracking_policy = process_attr_tracker_get_tracking_policy(tracker); - if (tracking_policy == LTTNG_TRACKING_POLICY_INCLUDE_ALL) { - /* Tracking all, nothing to output. */ - ret = LTTNG_OK; - goto end; - } - - ret = config_writer_open_element(writer, element_id_tracker); - if (ret) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } - - ret = config_writer_open_element( - writer, config_element_process_attr_values); - if (ret) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } - - if (tracking_policy == LTTNG_TRACKING_POLICY_EXCLUDE_ALL) { - /* Tracking nothing; empty list. */ - ret = config_writer_open_element(writer, element_target_id); - if (ret) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } - - /* /$element_target_id */ - ret = config_writer_close_element(writer); - if (ret) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } - } else { - unsigned int i, count; - enum process_attr_tracker_status status = - process_attr_tracker_get_inclusion_set( - tracker, &values); - - if (status != PROCESS_ATTR_TRACKER_STATUS_OK) { - ret = LTTNG_ERR_NOMEM; - goto end; - } - - count = _lttng_process_attr_values_get_count(values); - - for (i = 0; i < count; i++) { - unsigned int integral_value = UINT_MAX; - const char *name = NULL; - const struct process_attr_value *value = - lttng_process_attr_tracker_values_get_at_index( - values, i); - - assert(value); - ret = config_writer_open_element( - writer, element_target_id); - if (ret) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } - - switch (value->type) { - case LTTNG_PROCESS_ATTR_VALUE_TYPE_PID: - integral_value = - (unsigned int) value->value.pid; - break; - case LTTNG_PROCESS_ATTR_VALUE_TYPE_UID: - integral_value = - (unsigned int) value->value.uid; - break; - case LTTNG_PROCESS_ATTR_VALUE_TYPE_GID: - integral_value = - (unsigned int) value->value.gid; - break; - case LTTNG_PROCESS_ATTR_VALUE_TYPE_USER_NAME: - name = value->value.user_name; - assert(name); - break; - case LTTNG_PROCESS_ATTR_VALUE_TYPE_GROUP_NAME: - name = value->value.group_name; - assert(name); - break; - default: - abort(); - } - - if (name) { - ret = config_writer_write_element_string(writer, - config_element_name, name); - } else { - ret = config_writer_write_element_unsigned_int( - writer, element_id, - integral_value); - } - - if (ret) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } - - /* /$element_target_id */ - ret = config_writer_close_element(writer); - if (ret) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } - } - } - - /* /targets */ - ret = config_writer_close_element(writer); - if (ret) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } - - /* /$element_id_tracker */ - ret = config_writer_close_element(writer); - if (ret) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } - - ret = LTTNG_OK; -end: - lttng_process_attr_values_destroy(values); - return ret; -} - -/* Return LTTNG_OK on success else a LTTNG_ERR* code. */ -static int save_process_attr_trackers(struct config_writer *writer, - struct ltt_session *sess, - int domain) -{ - int ret; - - switch (domain) { - case LTTNG_DOMAIN_KERNEL: - ret = save_process_attr_tracker(writer, sess, domain, - LTTNG_PROCESS_ATTR_PROCESS_ID); - if (ret != LTTNG_OK) { - goto end; - } - ret = save_process_attr_tracker(writer, sess, domain, - LTTNG_PROCESS_ATTR_VIRTUAL_PROCESS_ID); - if (ret != LTTNG_OK) { - goto end; - } - ret = save_process_attr_tracker(writer, sess, domain, - LTTNG_PROCESS_ATTR_USER_ID); - if (ret != LTTNG_OK) { - goto end; - } - ret = save_process_attr_tracker(writer, sess, domain, - LTTNG_PROCESS_ATTR_VIRTUAL_USER_ID); - if (ret != LTTNG_OK) { - goto end; - } - ret = save_process_attr_tracker(writer, sess, domain, - LTTNG_PROCESS_ATTR_GROUP_ID); - if (ret != LTTNG_OK) { - goto end; - } - ret = save_process_attr_tracker(writer, sess, domain, - LTTNG_PROCESS_ATTR_VIRTUAL_GROUP_ID); - if (ret != LTTNG_OK) { - goto end; - } - break; - case LTTNG_DOMAIN_UST: - ret = save_process_attr_tracker(writer, sess, domain, - LTTNG_PROCESS_ATTR_VIRTUAL_PROCESS_ID); - if (ret != LTTNG_OK) { - goto end; - } - ret = save_process_attr_tracker(writer, sess, domain, - LTTNG_PROCESS_ATTR_VIRTUAL_USER_ID); - if (ret != LTTNG_OK) { - goto end; - } - ret = save_process_attr_tracker(writer, sess, domain, - LTTNG_PROCESS_ATTR_VIRTUAL_GROUP_ID); - if (ret != LTTNG_OK) { - goto end; - } - break; - default: - ret = LTTNG_ERR_INVALID; - } - ret = LTTNG_OK; -end: - return ret; -} - -/* Return LTTNG_OK on success else a LTTNG_ERR* code. */ -static -int save_ust_domain(struct config_writer *writer, - struct ltt_session *session, enum lttng_domain_type domain) -{ - int ret; - struct ltt_ust_channel *ust_chan; - const char *buffer_type_string; - struct lttng_ht_node_str *node; - struct lttng_ht_iter iter; - const char *config_domain_name; - - assert(writer); - assert(session); - - ret = config_writer_open_element(writer, - config_element_domain); - if (ret) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } - - config_domain_name = get_config_domain_str(domain); - if (!config_domain_name) { - ret = LTTNG_ERR_INVALID; - goto end; - } - - ret = config_writer_write_element_string(writer, - config_element_type, config_domain_name); - 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) { - ust_chan = caa_container_of(node, struct ltt_ust_channel, node); - if (domain == ust_chan->domain) { - ret = save_ust_channel(writer, ust_chan, session->ust_session); - if (ret != LTTNG_OK) { - 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; - } - - if (domain == LTTNG_DOMAIN_UST) { - ret = config_writer_open_element( - writer, config_element_process_attr_trackers); - if (ret) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } - - ret = save_process_attr_trackers( - writer, session, LTTNG_DOMAIN_UST); - if (ret != LTTNG_OK) { - goto end; - } - - /* /trackers */ - ret = config_writer_close_element(writer); - if (ret) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } - } - - /* /domain */ - ret = config_writer_close_element(writer); - if (ret) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } - - ret = LTTNG_OK; -end: - return ret; -} - -/* Return LTTNG_OK on success else a LTTNG_ERR* code. */ -static -int save_domains(struct config_writer *writer, struct ltt_session *session) -{ - int ret = LTTNG_OK; - - 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 != LTTNG_OK) { - goto end; - } - - ret = config_writer_open_element( - writer, config_element_process_attr_trackers); - if (ret) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } - - ret = save_process_attr_trackers( - writer, session, LTTNG_DOMAIN_KERNEL); - if (ret != LTTNG_OK) { - goto end; - } - - /* /trackers */ - ret = config_writer_close_element(writer); - if (ret) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } - /* /domain */ - ret = config_writer_close_element(writer); - if (ret) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } - } - - if (session->ust_session) { - ret = save_ust_domain(writer, session, LTTNG_DOMAIN_UST); - if (ret != LTTNG_OK) { - goto end; - } - - ret = save_ust_domain(writer, session, LTTNG_DOMAIN_JUL); - if (ret != LTTNG_OK) { - goto end; - } - - ret = save_ust_domain(writer, session, LTTNG_DOMAIN_LOG4J); - if (ret != LTTNG_OK) { - goto end; - } - - ret = save_ust_domain(writer, session, LTTNG_DOMAIN_PYTHON); - if (ret != LTTNG_OK) { - goto end; - } - } - - /* /domains */ - ret = config_writer_close_element(writer); - if (ret) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } - - ret = LTTNG_OK; -end: - return ret; -} - -/* Return LTTNG_OK on success else a LTTNG_ERR* code. */ -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.session_root_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; - } - ret = LTTNG_OK; -end_net_output: - free(uri); - if (ret != LTTNG_OK) { - 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; - } - - ret = LTTNG_OK; -end: - return ret; -} - -/* Return LTTNG_OK on success else a LTTNG_ERR* code. */ -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 != LTTNG_OK) { - 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; - } - - ret = LTTNG_OK; -end: - return ret; -end_unlock: - rcu_read_unlock(); - return ret; -} - -/* Return LTTNG_OK on success else a LTTNG_ERR* code. */ -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 = LTTNG_OK; - 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 != LTTNG_OK) { - goto end; - } - } else { - if (session->consumer) { - ret = save_consumer_output(writer, session->consumer); - if (ret != LTTNG_OK) { - goto end; - } - } - } - - /* /output */ - ret = config_writer_close_element(writer); - if (ret) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } - ret = LTTNG_OK; -end: - return ret; -} - -static -int save_session_rotation_schedule(struct config_writer *writer, - enum lttng_rotation_schedule_type type, uint64_t value) -{ - int ret = 0; - const char *element_name; - const char *value_name; - - switch (type) { - case LTTNG_ROTATION_SCHEDULE_TYPE_PERIODIC: - element_name = config_element_rotation_schedule_periodic; - value_name = config_element_rotation_schedule_periodic_time_us; - break; - case LTTNG_ROTATION_SCHEDULE_TYPE_SIZE_THRESHOLD: - element_name = config_element_rotation_schedule_size_threshold; - value_name = config_element_rotation_schedule_size_threshold_bytes; - break; - default: - ret = -1; - goto end; - } - - ret = config_writer_open_element(writer, element_name); - if (ret) { - goto end; - } - - ret = config_writer_write_element_unsigned_int(writer, - value_name, value); - if (ret) { - goto end; - } - - /* Close schedule descriptor element. */ - ret = config_writer_close_element(writer); - if (ret) { - goto end; - } -end: - return ret; -} - -static -int save_session_rotation_schedules(struct config_writer *writer, - struct ltt_session *session) -{ - int ret; - - ret = config_writer_open_element(writer, - config_element_rotation_schedules); - if (ret) { - goto end; - } - if (session->rotate_timer_period) { - ret = save_session_rotation_schedule(writer, - LTTNG_ROTATION_SCHEDULE_TYPE_PERIODIC, - session->rotate_timer_period); - if (ret) { - goto close_schedules; - } - } - if (session->rotate_size) { - ret = save_session_rotation_schedule(writer, - LTTNG_ROTATION_SCHEDULE_TYPE_SIZE_THRESHOLD, - session->rotate_size); - if (ret) { - goto close_schedules; - } - } - -close_schedules: - /* Close rotation schedules element. */ - ret = config_writer_close_element(writer); - if (ret) { - goto end; - } -end: - return ret; -} - -/* - * Save the given session. - * - * Return LTTNG_OK 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 = -1; - char config_file_path[LTTNG_PATH_MAX]; - size_t len; - struct config_writer *writer = NULL; - size_t session_name_len; - const char *provided_path; - int file_open_flags = O_CREAT | O_WRONLY | O_TRUNC; - - 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)) || session->destroyed) { - 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, sizeof(config_file_path)); - } 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, sizeof(config_file_path) - 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 (!attr->overwrite) { - file_open_flags |= O_EXCL; - } - - fd = run_as_open(config_file_path, file_open_flags, - 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"); - switch (errno) { - case EEXIST: - ret = LTTNG_ERR_SAVE_FILE_EXIST; - break; - case EACCES: - ret = LTTNG_ERR_EPERM; - break; - default: - ret = LTTNG_ERR_SAVE_IO_FAIL; - break; - } - goto end; - } - - writer = config_writer_create(fd, 1); - 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; - } - - if (session->shm_path[0] != '\0') { - ret = config_writer_write_element_string(writer, - config_element_shared_memory_path, - session->shm_path); - if (ret) { - ret = LTTNG_ERR_SAVE_IO_FAIL; - goto end; - } - } - - ret = save_domains(writer, session); - if (ret != LTTNG_OK) { - 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 || - session->rotate_timer_period || session->rotate_size) { - 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 if (session->live_timer) { - 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; - } - } - if (session->rotate_timer_period || session->rotate_size) { - ret = save_session_rotation_schedules(writer, - session); - 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 != LTTNG_OK) { - 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; - } - - ret = LTTNG_OK; -end: - if (writer && config_writer_destroy(writer)) { - /* Preserve the original error code */ - ret = ret != LTTNG_OK ? ret : LTTNG_ERR_SAVE_IO_FAIL; - } - if (ret != LTTNG_OK) { - /* Delete file in case of error */ - if ((fd >= 0) && unlink(config_file_path)) { - PERROR("Unlinking XML session configuration."); - } - } - - if (fd >= 0) { - int closeret; - - closeret = close(fd); - if (closeret) { - PERROR("Closing 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); - session_put(session); - if (ret != LTTNG_OK) { - goto end; - } - } else { - struct ltt_session_list *list = session_get_list(); - - cds_list_for_each_entry(session, &list->head, list) { - if (!session_get(session)) { - continue; - } - session_lock(session); - ret = save_session(session, attr, creds); - session_unlock(session); - session_put(session); - /* Don't abort if we don't have the required permissions. */ - if (ret != LTTNG_OK && ret != LTTNG_ERR_EPERM) { - goto end; - } - } - } - ret = LTTNG_OK; - -end: - session_unlock_list(); - return ret; -}