* Copyright(C) 2020 Marvell International Ltd.
*/
-#include <rte_trace.h>
-#include <rte_trace_point.h>
+#include <fnmatch.h>
+#include <inttypes.h>
+#include <sys/queue.h>
+#include <regex.h>
+#include <rte_common.h>
+#include <rte_errno.h>
+#include <rte_lcore.h>
+#include <rte_per_lcore.h>
+#include <rte_string_fns.h>
+
+#include "eal_trace.h"
+
+RTE_DEFINE_PER_LCORE(volatile int, trace_point_sz);
+static RTE_DEFINE_PER_LCORE(char, ctf_field[TRACE_CTF_FIELD_SIZE]);
+static RTE_DEFINE_PER_LCORE(int, ctf_count);
+
+static struct trace_point_head tp_list = STAILQ_HEAD_INITIALIZER(tp_list);
+static struct trace trace;
+
+struct trace *
+trace_obj_get(void)
+{
+ return &trace;
+}
+
+struct trace_point_head *
+trace_list_head_get(void)
+{
+ return &tp_list;
+}
+
+int
+eal_trace_init(void)
+{
+ /* One of the trace point registration failed */
+ if (trace.register_errno) {
+ rte_errno = trace.register_errno;
+ goto fail;
+ }
+
+ if (!rte_trace_is_enabled())
+ return 0;
+
+ rte_spinlock_init(&trace.lock);
+
+ /* Is duplicate trace name registered */
+ if (trace_has_duplicate_entry())
+ goto fail;
+
+ /* Generate UUID ver 4 with total size of events and number of
+ * events
+ */
+ trace_uuid_generate();
+
+ /* Generate CTF TDSL metadata */
+ if (trace_metadata_create() < 0)
+ goto fail;
+
+ /* Create trace directory */
+ if (trace_mkdir())
+ goto free_meta;
+
+ /* Save current epoch timestamp for future use */
+ if (trace_epoch_time_save() < 0)
+ goto fail;
+
+ rte_trace_mode_set(trace.mode);
+
+ return 0;
+
+free_meta:
+ trace_metadata_destroy();
+fail:
+ trace_err("failed to initialize trace [%s]", rte_strerror(rte_errno));
+ return -rte_errno;
+}
+
+void
+eal_trace_fini(void)
+{
+ if (!rte_trace_is_enabled())
+ return;
+ trace_metadata_destroy();
+}
+
+bool
+rte_trace_is_enabled(void)
+{
+ return trace.status;
+}
+
+static void
+trace_mode_set(rte_trace_point_t *trace, enum rte_trace_mode mode)
+{
+ if (mode == RTE_TRACE_MODE_OVERWRITE)
+ __atomic_and_fetch(trace, ~__RTE_TRACE_FIELD_ENABLE_DISCARD,
+ __ATOMIC_RELEASE);
+ else
+ __atomic_or_fetch(trace, __RTE_TRACE_FIELD_ENABLE_DISCARD,
+ __ATOMIC_RELEASE);
+}
+
+void
+rte_trace_mode_set(enum rte_trace_mode mode)
+{
+ struct trace_point *tp;
+
+ if (!rte_trace_is_enabled())
+ return;
+
+ STAILQ_FOREACH(tp, &tp_list, next)
+ trace_mode_set(tp->handle, mode);
+
+ trace.mode = mode;
+}
+
+enum
+rte_trace_mode rte_trace_mode_get(void)
+{
+ return trace.mode;
+}
+
+static bool
+trace_point_is_invalid(rte_trace_point_t *t)
+{
+ return (t == NULL) || (trace_id_get(t) >= trace.nb_trace_points);
+}
+
+bool
+rte_trace_point_is_enabled(rte_trace_point_t *trace)
+{
+ uint64_t val;
+
+ if (trace_point_is_invalid(trace))
+ return false;
+
+ val = __atomic_load_n(trace, __ATOMIC_ACQUIRE);
+ return (val & __RTE_TRACE_FIELD_ENABLE_MASK) != 0;
+}
+
+int
+rte_trace_point_enable(rte_trace_point_t *trace)
+{
+ if (trace_point_is_invalid(trace))
+ return -ERANGE;
+
+ __atomic_or_fetch(trace, __RTE_TRACE_FIELD_ENABLE_MASK,
+ __ATOMIC_RELEASE);
+ return 0;
+}
+
+int
+rte_trace_point_disable(rte_trace_point_t *trace)
+{
+ if (trace_point_is_invalid(trace))
+ return -ERANGE;
+
+ __atomic_and_fetch(trace, ~__RTE_TRACE_FIELD_ENABLE_MASK,
+ __ATOMIC_RELEASE);
+ return 0;
+}
+
+int
+rte_trace_pattern(const char *pattern, bool enable)
+{
+ struct trace_point *tp;
+ int rc = 0, found = 0;
+
+ STAILQ_FOREACH(tp, &tp_list, next) {
+ if (fnmatch(pattern, tp->name, 0) == 0) {
+ if (enable)
+ rc = rte_trace_point_enable(tp->handle);
+ else
+ rc = rte_trace_point_disable(tp->handle);
+ found = 1;
+ }
+ if (rc < 0)
+ return rc;
+ }
+
+ return rc | found;
+}
+
+int
+rte_trace_regexp(const char *regex, bool enable)
+{
+ struct trace_point *tp;
+ int rc = 0, found = 0;
+ regex_t r;
+
+ if (regcomp(&r, regex, 0) != 0)
+ return -EINVAL;
+
+ STAILQ_FOREACH(tp, &tp_list, next) {
+ if (regexec(&r, tp->name, 0, NULL, 0) == 0) {
+ if (enable)
+ rc = rte_trace_point_enable(tp->handle);
+ else
+ rc = rte_trace_point_disable(tp->handle);
+ found = 1;
+ }
+ if (rc < 0)
+ return rc;
+ }
+ regfree(&r);
+
+ return rc | found;
+}
+
+rte_trace_point_t *
+rte_trace_point_lookup(const char *name)
+{
+ struct trace_point *tp;
+
+ if (name == NULL)
+ return NULL;
+
+ STAILQ_FOREACH(tp, &tp_list, next)
+ if (strncmp(tp->name, name, TRACE_POINT_NAME_SIZE) == 0)
+ return tp->handle;
+
+ return NULL;
+}
+
+int
+__rte_trace_point_register(rte_trace_point_t *handle, const char *name,
+ void (*register_fn)(void))
+{
+ char *field = RTE_PER_LCORE(ctf_field);
+ struct trace_point *tp;
+ uint16_t sz;
+
+ /* Sanity checks of arguments */
+ if (name == NULL || register_fn == NULL || handle == NULL) {
+ trace_err("invalid arguments");
+ rte_errno = EINVAL;
+ goto fail;
+ }
+
+ /* Check the size of the trace point object */
+ RTE_PER_LCORE(trace_point_sz) = 0;
+ RTE_PER_LCORE(ctf_count) = 0;
+ register_fn();
+ if (RTE_PER_LCORE(trace_point_sz) == 0) {
+ trace_err("missing rte_trace_emit_header() in register fn");
+ rte_errno = EBADF;
+ goto fail;
+ }
+
+ /* Is size overflowed */
+ if (RTE_PER_LCORE(trace_point_sz) > UINT16_MAX) {
+ trace_err("trace point size overflowed");
+ rte_errno = ENOSPC;
+ goto fail;
+ }
+
+ /* Are we running out of space to store trace points? */
+ if (trace.nb_trace_points > UINT16_MAX) {
+ trace_err("trace point exceeds the max count");
+ rte_errno = ENOSPC;
+ goto fail;
+ }
+
+ /* Get the size of the trace point */
+ sz = RTE_PER_LCORE(trace_point_sz);
+ tp = calloc(1, sizeof(struct trace_point));
+ if (tp == NULL) {
+ trace_err("fail to allocate trace point memory");
+ rte_errno = ENOMEM;
+ goto fail;
+ }
+
+ /* Initialize the trace point */
+ if (rte_strscpy(tp->name, name, TRACE_POINT_NAME_SIZE) < 0) {
+ trace_err("name is too long");
+ rte_errno = E2BIG;
+ goto free;
+ }
+
+ /* Copy the field data for future use */
+ if (rte_strscpy(tp->ctf_field, field, TRACE_CTF_FIELD_SIZE) < 0) {
+ trace_err("CTF field size is too long");
+ rte_errno = E2BIG;
+ goto free;
+ }
+
+ /* Clear field memory for the next event */
+ memset(field, 0, TRACE_CTF_FIELD_SIZE);
+
+ /* Form the trace handle */
+ *handle = sz;
+ *handle |= trace.nb_trace_points << __RTE_TRACE_FIELD_ID_SHIFT;
+
+ trace.nb_trace_points++;
+ tp->handle = handle;
+
+ /* Add the trace point at tail */
+ STAILQ_INSERT_TAIL(&tp_list, tp, next);
+ __atomic_thread_fence(__ATOMIC_RELEASE);
+
+ /* All Good !!! */
+ return 0;
+free:
+ free(tp);
+fail:
+ if (trace.register_errno == 0)
+ trace.register_errno = rte_errno;
+
+ return -rte_errno;
+}
git.droids-corp.org / dpdk.git / blobdiff