tracing/uprobes: Convert to struct trace_probe
Convert struct trace_uprobe to make use of the common trace_probe structure. Reviewed-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Acked-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com> Acked-by: Oleg Nesterov <oleg@redhat.com> Cc: zhangwei(Jovi) <jovi.zhangwei@huawei.com> Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
This commit is contained in:
Namhyung Kim
Steven Rostedt
parent
c31ffb3ff6
commit
14577c3992
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@ -51,22 +51,17 @@ struct trace_uprobe_filter {
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*/
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struct trace_uprobe {
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struct list_head list;
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struct ftrace_event_class class;
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struct ftrace_event_call call;
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struct trace_uprobe_filter filter;
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struct uprobe_consumer consumer;
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struct inode *inode;
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char *filename;
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unsigned long offset;
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unsigned long nhit;
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unsigned int flags; /* For TP_FLAG_* */
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ssize_t size; /* trace entry size */
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unsigned int nr_args;
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struct probe_arg args[];
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struct trace_probe tp;
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};
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#define SIZEOF_TRACE_UPROBE(n) \
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(offsetof(struct trace_uprobe, args) + \
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#define SIZEOF_TRACE_UPROBE(n) \
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(offsetof(struct trace_uprobe, tp.args) + \
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(sizeof(struct probe_arg) * (n)))
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static int register_uprobe_event(struct trace_uprobe *tu);
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@ -114,13 +109,13 @@ alloc_trace_uprobe(const char *group, const char *event, int nargs, bool is_ret)
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if (!tu)
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return ERR_PTR(-ENOMEM);
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tu->call.class = &tu->class;
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tu->call.name = kstrdup(event, GFP_KERNEL);
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if (!tu->call.name)
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tu->tp.call.class = &tu->tp.class;
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tu->tp.call.name = kstrdup(event, GFP_KERNEL);
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if (!tu->tp.call.name)
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goto error;
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tu->class.system = kstrdup(group, GFP_KERNEL);
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if (!tu->class.system)
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tu->tp.class.system = kstrdup(group, GFP_KERNEL);
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if (!tu->tp.class.system)
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goto error;
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INIT_LIST_HEAD(&tu->list);
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@ -128,11 +123,11 @@ alloc_trace_uprobe(const char *group, const char *event, int nargs, bool is_ret)
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if (is_ret)
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tu->consumer.ret_handler = uretprobe_dispatcher;
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init_trace_uprobe_filter(&tu->filter);
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tu->call.flags |= TRACE_EVENT_FL_USE_CALL_FILTER;
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tu->tp.call.flags |= TRACE_EVENT_FL_USE_CALL_FILTER;
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return tu;
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error:
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kfree(tu->call.name);
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kfree(tu->tp.call.name);
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kfree(tu);
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return ERR_PTR(-ENOMEM);
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@ -142,12 +137,12 @@ static void free_trace_uprobe(struct trace_uprobe *tu)
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{
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int i;
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for (i = 0; i < tu->nr_args; i++)
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traceprobe_free_probe_arg(&tu->args[i]);
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for (i = 0; i < tu->tp.nr_args; i++)
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traceprobe_free_probe_arg(&tu->tp.args[i]);
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iput(tu->inode);
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kfree(tu->call.class->system);
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kfree(tu->call.name);
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kfree(tu->tp.call.class->system);
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kfree(tu->tp.call.name);
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kfree(tu->filename);
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kfree(tu);
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}
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@ -157,8 +152,8 @@ static struct trace_uprobe *find_probe_event(const char *event, const char *grou
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struct trace_uprobe *tu;
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list_for_each_entry(tu, &uprobe_list, list)
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if (strcmp(tu->call.name, event) == 0 &&
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strcmp(tu->call.class->system, group) == 0)
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if (strcmp(tu->tp.call.name, event) == 0 &&
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strcmp(tu->tp.call.class->system, group) == 0)
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return tu;
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return NULL;
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@ -181,16 +176,16 @@ static int unregister_trace_uprobe(struct trace_uprobe *tu)
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/* Register a trace_uprobe and probe_event */
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static int register_trace_uprobe(struct trace_uprobe *tu)
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{
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struct trace_uprobe *old_tp;
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struct trace_uprobe *old_tu;
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int ret;
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mutex_lock(&uprobe_lock);
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/* register as an event */
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old_tp = find_probe_event(tu->call.name, tu->call.class->system);
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if (old_tp) {
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old_tu = find_probe_event(tu->tp.call.name, tu->tp.call.class->system);
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if (old_tu) {
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/* delete old event */
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ret = unregister_trace_uprobe(old_tp);
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ret = unregister_trace_uprobe(old_tu);
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if (ret)
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goto end;
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}
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@ -360,34 +355,36 @@ static int create_trace_uprobe(int argc, char **argv)
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/* parse arguments */
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ret = 0;
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for (i = 0; i < argc && i < MAX_TRACE_ARGS; i++) {
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struct probe_arg *parg = &tu->tp.args[i];
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/* Increment count for freeing args in error case */
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tu->nr_args++;
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tu->tp.nr_args++;
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/* Parse argument name */
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arg = strchr(argv[i], '=');
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if (arg) {
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*arg++ = '\0';
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tu->args[i].name = kstrdup(argv[i], GFP_KERNEL);
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parg->name = kstrdup(argv[i], GFP_KERNEL);
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} else {
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arg = argv[i];
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/* If argument name is omitted, set "argN" */
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snprintf(buf, MAX_EVENT_NAME_LEN, "arg%d", i + 1);
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tu->args[i].name = kstrdup(buf, GFP_KERNEL);
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parg->name = kstrdup(buf, GFP_KERNEL);
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}
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if (!tu->args[i].name) {
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if (!parg->name) {
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pr_info("Failed to allocate argument[%d] name.\n", i);
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ret = -ENOMEM;
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goto error;
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}
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if (!is_good_name(tu->args[i].name)) {
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pr_info("Invalid argument[%d] name: %s\n", i, tu->args[i].name);
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if (!is_good_name(parg->name)) {
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pr_info("Invalid argument[%d] name: %s\n", i, parg->name);
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ret = -EINVAL;
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goto error;
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}
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if (traceprobe_conflict_field_name(tu->args[i].name, tu->args, i)) {
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if (traceprobe_conflict_field_name(parg->name, tu->tp.args, i)) {
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pr_info("Argument[%d] name '%s' conflicts with "
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"another field.\n", i, argv[i]);
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ret = -EINVAL;
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@ -395,7 +392,8 @@ static int create_trace_uprobe(int argc, char **argv)
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}
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/* Parse fetch argument */
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ret = traceprobe_parse_probe_arg(arg, &tu->size, &tu->args[i], false, false);
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ret = traceprobe_parse_probe_arg(arg, &tu->tp.size, parg,
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false, false);
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if (ret) {
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pr_info("Parse error at argument[%d]. (%d)\n", i, ret);
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goto error;
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@ -459,11 +457,11 @@ static int probes_seq_show(struct seq_file *m, void *v)
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char c = is_ret_probe(tu) ? 'r' : 'p';
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int i;
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seq_printf(m, "%c:%s/%s", c, tu->call.class->system, tu->call.name);
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seq_printf(m, "%c:%s/%s", c, tu->tp.call.class->system, tu->tp.call.name);
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seq_printf(m, " %s:0x%p", tu->filename, (void *)tu->offset);
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for (i = 0; i < tu->nr_args; i++)
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seq_printf(m, " %s=%s", tu->args[i].name, tu->args[i].comm);
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for (i = 0; i < tu->tp.nr_args; i++)
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seq_printf(m, " %s=%s", tu->tp.args[i].name, tu->tp.args[i].comm);
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seq_printf(m, "\n");
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return 0;
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@ -509,7 +507,7 @@ static int probes_profile_seq_show(struct seq_file *m, void *v)
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{
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struct trace_uprobe *tu = v;
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seq_printf(m, " %s %-44s %15lu\n", tu->filename, tu->call.name, tu->nhit);
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seq_printf(m, " %s %-44s %15lu\n", tu->filename, tu->tp.call.name, tu->nhit);
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return 0;
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}
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@ -541,11 +539,11 @@ static void uprobe_trace_print(struct trace_uprobe *tu,
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struct ring_buffer *buffer;
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void *data;
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int size, i;
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struct ftrace_event_call *call = &tu->call;
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struct ftrace_event_call *call = &tu->tp.call;
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size = SIZEOF_TRACE_ENTRY(is_ret_probe(tu));
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event = trace_current_buffer_lock_reserve(&buffer, call->event.type,
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size + tu->size, 0, 0);
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size + tu->tp.size, 0, 0);
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if (!event)
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return;
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@ -559,8 +557,10 @@ static void uprobe_trace_print(struct trace_uprobe *tu,
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data = DATAOF_TRACE_ENTRY(entry, false);
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}
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for (i = 0; i < tu->nr_args; i++)
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call_fetch(&tu->args[i].fetch, regs, data + tu->args[i].offset);
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for (i = 0; i < tu->tp.nr_args; i++) {
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call_fetch(&tu->tp.args[i].fetch, regs,
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data + tu->tp.args[i].offset);
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}
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if (!call_filter_check_discard(call, entry, buffer, event))
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trace_buffer_unlock_commit(buffer, event, 0, 0);
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@ -591,23 +591,24 @@ print_uprobe_event(struct trace_iterator *iter, int flags, struct trace_event *e
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int i;
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entry = (struct uprobe_trace_entry_head *)iter->ent;
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tu = container_of(event, struct trace_uprobe, call.event);
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tu = container_of(event, struct trace_uprobe, tp.call.event);
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if (is_ret_probe(tu)) {
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if (!trace_seq_printf(s, "%s: (0x%lx <- 0x%lx)", tu->call.name,
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if (!trace_seq_printf(s, "%s: (0x%lx <- 0x%lx)", tu->tp.call.name,
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entry->vaddr[1], entry->vaddr[0]))
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goto partial;
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data = DATAOF_TRACE_ENTRY(entry, true);
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} else {
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if (!trace_seq_printf(s, "%s: (0x%lx)", tu->call.name,
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if (!trace_seq_printf(s, "%s: (0x%lx)", tu->tp.call.name,
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entry->vaddr[0]))
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goto partial;
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data = DATAOF_TRACE_ENTRY(entry, false);
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}
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for (i = 0; i < tu->nr_args; i++) {
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if (!tu->args[i].type->print(s, tu->args[i].name,
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data + tu->args[i].offset, entry))
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for (i = 0; i < tu->tp.nr_args; i++) {
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struct probe_arg *parg = &tu->tp.args[i];
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if (!parg->type->print(s, parg->name, data + parg->offset, entry))
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goto partial;
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}
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@ -618,11 +619,6 @@ partial:
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return TRACE_TYPE_PARTIAL_LINE;
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}
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static inline bool is_trace_uprobe_enabled(struct trace_uprobe *tu)
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{
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return tu->flags & (TP_FLAG_TRACE | TP_FLAG_PROFILE);
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}
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typedef bool (*filter_func_t)(struct uprobe_consumer *self,
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enum uprobe_filter_ctx ctx,
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struct mm_struct *mm);
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@ -632,29 +628,29 @@ probe_event_enable(struct trace_uprobe *tu, int flag, filter_func_t filter)
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{
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int ret = 0;
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if (is_trace_uprobe_enabled(tu))
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if (trace_probe_is_enabled(&tu->tp))
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return -EINTR;
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WARN_ON(!uprobe_filter_is_empty(&tu->filter));
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tu->flags |= flag;
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tu->tp.flags |= flag;
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tu->consumer.filter = filter;
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ret = uprobe_register(tu->inode, tu->offset, &tu->consumer);
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if (ret)
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tu->flags &= ~flag;
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tu->tp.flags &= ~flag;
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return ret;
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}
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static void probe_event_disable(struct trace_uprobe *tu, int flag)
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{
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if (!is_trace_uprobe_enabled(tu))
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if (!trace_probe_is_enabled(&tu->tp))
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return;
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WARN_ON(!uprobe_filter_is_empty(&tu->filter));
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uprobe_unregister(tu->inode, tu->offset, &tu->consumer);
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tu->flags &= ~flag;
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tu->tp.flags &= ~flag;
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}
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static int uprobe_event_define_fields(struct ftrace_event_call *event_call)
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@ -672,12 +668,12 @@ static int uprobe_event_define_fields(struct ftrace_event_call *event_call)
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size = SIZEOF_TRACE_ENTRY(false);
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}
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/* Set argument names as fields */
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for (i = 0; i < tu->nr_args; i++) {
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ret = trace_define_field(event_call, tu->args[i].type->fmttype,
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tu->args[i].name,
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size + tu->args[i].offset,
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tu->args[i].type->size,
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tu->args[i].type->is_signed,
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for (i = 0; i < tu->tp.nr_args; i++) {
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struct probe_arg *parg = &tu->tp.args[i];
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ret = trace_define_field(event_call, parg->type->fmttype,
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parg->name, size + parg->offset,
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parg->type->size, parg->type->is_signed,
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FILTER_OTHER);
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if (ret)
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@ -705,16 +701,16 @@ static int __set_print_fmt(struct trace_uprobe *tu, char *buf, int len)
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pos += snprintf(buf + pos, LEN_OR_ZERO, "\"%s", fmt);
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for (i = 0; i < tu->nr_args; i++) {
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for (i = 0; i < tu->tp.nr_args; i++) {
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pos += snprintf(buf + pos, LEN_OR_ZERO, " %s=%s",
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tu->args[i].name, tu->args[i].type->fmt);
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tu->tp.args[i].name, tu->tp.args[i].type->fmt);
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}
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pos += snprintf(buf + pos, LEN_OR_ZERO, "\", %s", arg);
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for (i = 0; i < tu->nr_args; i++) {
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for (i = 0; i < tu->tp.nr_args; i++) {
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pos += snprintf(buf + pos, LEN_OR_ZERO, ", REC->%s",
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tu->args[i].name);
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tu->tp.args[i].name);
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}
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return pos; /* return the length of print_fmt */
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@ -734,7 +730,7 @@ static int set_print_fmt(struct trace_uprobe *tu)
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/* Second: actually write the @print_fmt */
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__set_print_fmt(tu, print_fmt, len + 1);
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tu->call.print_fmt = print_fmt;
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tu->tp.call.print_fmt = print_fmt;
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return 0;
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}
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@ -831,14 +827,14 @@ static bool uprobe_perf_filter(struct uprobe_consumer *uc,
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static void uprobe_perf_print(struct trace_uprobe *tu,
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unsigned long func, struct pt_regs *regs)
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{
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struct ftrace_event_call *call = &tu->call;
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struct ftrace_event_call *call = &tu->tp.call;
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struct uprobe_trace_entry_head *entry;
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struct hlist_head *head;
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void *data;
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int size, rctx, i;
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size = SIZEOF_TRACE_ENTRY(is_ret_probe(tu));
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size = ALIGN(size + tu->size + sizeof(u32), sizeof(u64)) - sizeof(u32);
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size = ALIGN(size + tu->tp.size + sizeof(u32), sizeof(u64)) - sizeof(u32);
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preempt_disable();
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head = this_cpu_ptr(call->perf_events);
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@ -858,8 +854,11 @@ static void uprobe_perf_print(struct trace_uprobe *tu,
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data = DATAOF_TRACE_ENTRY(entry, false);
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}
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for (i = 0; i < tu->nr_args; i++)
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call_fetch(&tu->args[i].fetch, regs, data + tu->args[i].offset);
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for (i = 0; i < tu->tp.nr_args; i++) {
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struct probe_arg *parg = &tu->tp.args[i];
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call_fetch(&parg->fetch, regs, data + parg->offset);
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}
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perf_trace_buf_submit(entry, size, rctx, 0, 1, regs, head, NULL);
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out:
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@ -926,11 +925,11 @@ static int uprobe_dispatcher(struct uprobe_consumer *con, struct pt_regs *regs)
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tu = container_of(con, struct trace_uprobe, consumer);
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tu->nhit++;
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if (tu->flags & TP_FLAG_TRACE)
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if (tu->tp.flags & TP_FLAG_TRACE)
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ret |= uprobe_trace_func(tu, regs);
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#ifdef CONFIG_PERF_EVENTS
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if (tu->flags & TP_FLAG_PROFILE)
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if (tu->tp.flags & TP_FLAG_PROFILE)
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ret |= uprobe_perf_func(tu, regs);
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#endif
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return ret;
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@ -943,11 +942,11 @@ static int uretprobe_dispatcher(struct uprobe_consumer *con,
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tu = container_of(con, struct trace_uprobe, consumer);
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if (tu->flags & TP_FLAG_TRACE)
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if (tu->tp.flags & TP_FLAG_TRACE)
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uretprobe_trace_func(tu, func, regs);
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#ifdef CONFIG_PERF_EVENTS
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if (tu->flags & TP_FLAG_PROFILE)
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if (tu->tp.flags & TP_FLAG_PROFILE)
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uretprobe_perf_func(tu, func, regs);
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#endif
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return 0;
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@ -959,7 +958,7 @@ static struct trace_event_functions uprobe_funcs = {
|
|||
|
||||
static int register_uprobe_event(struct trace_uprobe *tu)
|
||||
{
|
||||
struct ftrace_event_call *call = &tu->call;
|
||||
struct ftrace_event_call *call = &tu->tp.call;
|
||||
int ret;
|
||||
|
||||
/* Initialize ftrace_event_call */
|
||||
|
|
@ -994,11 +993,11 @@ static int unregister_uprobe_event(struct trace_uprobe *tu)
|
|||
int ret;
|
||||
|
||||
/* tu->event is unregistered in trace_remove_event_call() */
|
||||
ret = trace_remove_event_call(&tu->call);
|
||||
ret = trace_remove_event_call(&tu->tp.call);
|
||||
if (ret)
|
||||
return ret;
|
||||
kfree(tu->call.print_fmt);
|
||||
tu->call.print_fmt = NULL;
|
||||
kfree(tu->tp.call.print_fmt);
|
||||
tu->tp.call.print_fmt = NULL;
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue