diff options
| author | Masami Hiramatsu <mhiramat@redhat.com> | 2009-12-08 17:03:16 -0500 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-12-09 07:26:53 +0100 |
| commit | a7c312bed772c11138409c3a98531e85d690302e (patch) | |
| tree | 3471a0d13a790e563f3191c524a742876ff81b25 | |
| parent | f984f03da35357b23d53e9cad29e909810857451 (diff) | |
trace-kprobe: Support delete probe syntax
Support delete probe syntax. The syntax is "-:[group/]event".
Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Jim Keniston <jkenisto@us.ibm.com>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Frank Ch. Eigler <fche@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jason Baron <jbaron@redhat.com>
Cc: K.Prasad <prasad@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: systemtap <systemtap@sources.redhat.com>
Cc: DLE <dle-develop@lists.sourceforge.net>
LKML-Reference: <20091208220316.10142.39192.stgit@dhcp-100-2-132.bos.redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Jim Keniston <jkenisto@us.ibm.com>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Frank Ch. Eigler <fche@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jason Baron <jbaron@redhat.com>
Cc: K.Prasad <prasad@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
| -rw-r--r-- | kernel/trace/trace_kprobe.c | 37 |
1 files changed, 28 insertions, 9 deletions
diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c index aff5f80b59b..bf05fb49a6f 100644 --- a/kernel/trace/trace_kprobe.c +++ b/kernel/trace/trace_kprobe.c @@ -606,23 +606,22 @@ static int create_trace_probe(int argc, char **argv) */ struct trace_probe *tp; int i, ret = 0; - int is_return = 0; + int is_return = 0, is_delete = 0; char *symbol = NULL, *event = NULL, *arg = NULL, *group = NULL; unsigned long offset = 0; void *addr = NULL; char buf[MAX_EVENT_NAME_LEN]; - if (argc < 2) { - pr_info("Probe point is not specified.\n"); - return -EINVAL; - } - + /* argc must be >= 1 */ if (argv[0][0] == 'p') is_return = 0; else if (argv[0][0] == 'r') is_return = 1; + else if (argv[0][0] == '-') + is_delete = 1; else { - pr_info("Probe definition must be started with 'p' or 'r'.\n"); + pr_info("Probe definition must be started with 'p', 'r' or" + " '-'.\n"); return -EINVAL; } @@ -642,7 +641,29 @@ static int create_trace_probe(int argc, char **argv) return -EINVAL; } } + if (!group) + group = KPROBE_EVENT_SYSTEM; + if (is_delete) { + if (!event) { + pr_info("Delete command needs an event name.\n"); + return -EINVAL; + } + tp = find_probe_event(event, group); + if (!tp) { + pr_info("Event %s/%s doesn't exist.\n", group, event); + return -ENOENT; + } + /* delete an event */ + unregister_trace_probe(tp); + free_trace_probe(tp); + return 0; + } + + if (argc < 2) { + pr_info("Probe point is not specified.\n"); + return -EINVAL; + } if (isdigit(argv[1][0])) { if (is_return) { pr_info("Return probe point must be a symbol.\n"); @@ -671,8 +692,6 @@ static int create_trace_probe(int argc, char **argv) argc -= 2; argv += 2; /* setup a probe */ - if (!group) - group = KPROBE_EVENT_SYSTEM; if (!event) { /* Make a new event name */ if (symbol) |