diff options
author | Steven Rostedt (VMware) <rostedt@goodmis.org> | 2017-04-10 22:30:05 -0400 |
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committer | Steven Rostedt (VMware) <rostedt@goodmis.org> | 2017-04-20 22:06:45 -0400 |
commit | b5f081b563a6cdcb85a543df8c851951a8978275 (patch) | |
tree | b9ab66a67e30d9f63fef8cb33da1d0e8893b1b15 /kernel/trace/ftrace.c | |
parent | 04ec7bb642b77374b53731b795b5654b5aff1c00 (diff) | |
download | linux-next-b5f081b563a6cdcb85a543df8c851951a8978275.tar.gz |
tracing: Pass the trace_array into ftrace_probe_ops functions
Pass the trace_array associated to a ftrace_probe_ops into the probe_ops
func(), init() and free() functions. The trace_array is the descriptor that
describes a tracing instance. This will help create the infrastructure that
will allow having function probes unique to tracing instances.
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'kernel/trace/ftrace.c')
-rw-r--r-- | kernel/trace/ftrace.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c index ea208e93f000..e51cd6b51253 100644 --- a/kernel/trace/ftrace.c +++ b/kernel/trace/ftrace.c @@ -3791,6 +3791,7 @@ static void function_trace_probe_call(unsigned long ip, unsigned long parent_ip, struct ftrace_ops *op, struct pt_regs *pt_regs) { struct ftrace_probe_ops *probe_ops; + struct trace_array *tr = op->private; probe_ops = container_of(op, struct ftrace_probe_ops, ops); @@ -3800,7 +3801,7 @@ static void function_trace_probe_call(unsigned long ip, unsigned long parent_ip, * on the hash. rcu_read_lock is too dangerous here. */ preempt_disable_notrace(); - probe_ops->func(ip, parent_ip, probe_ops, NULL); + probe_ops->func(ip, parent_ip, tr, probe_ops, NULL); preempt_enable_notrace(); } @@ -3969,6 +3970,7 @@ register_ftrace_function_probe(char *glob, struct trace_array *tr, ops->ops.func = function_trace_probe_call; ftrace_ops_init(&ops->ops); INIT_LIST_HEAD(&ops->list); + ops->ops.private = tr; } mutex_lock(&ops->ops.func_hash->regex_lock); @@ -3997,7 +3999,7 @@ register_ftrace_function_probe(char *glob, struct trace_array *tr, * to give the caller an opportunity to do so. */ if (ops->init) { - ret = ops->init(ops, entry->ip, data); + ret = ops->init(ops, tr, entry->ip, data); if (ret < 0) goto out; } @@ -4038,7 +4040,7 @@ register_ftrace_function_probe(char *glob, struct trace_array *tr, hlist_for_each_entry(entry, &hash->buckets[i], hlist) { if (ftrace_lookup_ip(old_hash, entry->ip)) continue; - ops->free(ops, entry->ip, NULL); + ops->free(ops, tr, entry->ip, NULL); } } goto out_unlock; @@ -4055,6 +4057,7 @@ unregister_ftrace_function_probe_func(char *glob, struct ftrace_probe_ops *ops) struct ftrace_hash *hash = NULL; struct hlist_node *tmp; struct hlist_head hhd; + struct trace_array *tr; char str[KSYM_SYMBOL_LEN]; int i, ret; int size; @@ -4062,6 +4065,8 @@ unregister_ftrace_function_probe_func(char *glob, struct ftrace_probe_ops *ops) if (!(ops->ops.flags & FTRACE_OPS_FL_INITIALIZED)) return -EINVAL; + tr = ops->ops.private; + if (glob && (strcmp(glob, "*") == 0 || !strlen(glob))) func_g.search = NULL; else if (glob) { @@ -4139,7 +4144,7 @@ unregister_ftrace_function_probe_func(char *glob, struct ftrace_probe_ops *ops) hlist_for_each_entry_safe(entry, tmp, &hhd, hlist) { hlist_del(&entry->hlist); if (ops->free) - ops->free(ops, entry->ip, NULL); + ops->free(ops, tr, entry->ip, NULL); kfree(entry); } mutex_unlock(&ftrace_lock); |