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authorMasami Hiramatsu <mhiramat@kernel.org>2016-10-05 14:58:15 +0300
committerSteven Rostedt <rostedt@goodmis.org>2016-11-15 00:42:58 +0300
commit60f1d5e3bac44b598f67d36062da96c095d2b700 (patch)
tree87990c058f734d14b446e99772548971138e1192 /Documentation/trace
parent546fece4eae871f033925ccf0ff2b740725ae915 (diff)
downloadlinux-60f1d5e3bac44b598f67d36062da96c095d2b700.tar.xz
ftrace: Support full glob matching
Use glob_match() to support flexible glob wildcards (*,?) and character classes ([) for ftrace. Since the full glob matching is slower than the current partial matching routines(*pat, pat*, *pat*), this leaves those routines and just add MATCH_GLOB for complex glob expression. e.g. ---- [root@localhost tracing]# echo 'sched*group' > set_ftrace_filter [root@localhost tracing]# cat set_ftrace_filter sched_free_group sched_change_group sched_create_group sched_online_group sched_destroy_group sched_offline_group [root@localhost tracing]# echo '[Ss]y[Ss]_*' > set_ftrace_filter [root@localhost tracing]# head set_ftrace_filter sys_arch_prctl sys_rt_sigreturn sys_ioperm SyS_iopl sys_modify_ldt SyS_mmap SyS_set_thread_area SyS_get_thread_area SyS_set_tid_address sys_fork ---- Link: http://lkml.kernel.org/r/147566869501.29136.6462645009894738056.stgit@devbox Acked-by: Namhyung Kim <namhyung@kernel.org> Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'Documentation/trace')
-rw-r--r--Documentation/trace/events.txt9
-rw-r--r--Documentation/trace/ftrace.txt9
2 files changed, 6 insertions, 12 deletions
diff --git a/Documentation/trace/events.txt b/Documentation/trace/events.txt
index 08d74d75150d..2cc08d4a326e 100644
--- a/Documentation/trace/events.txt
+++ b/Documentation/trace/events.txt
@@ -189,16 +189,13 @@ And for string fields they are:
==, !=, ~
-The glob (~) only accepts a wild card character (*) at the start and or
-end of the string. For example:
+The glob (~) accepts a wild card character (*,?) and character classes
+([). For example:
prev_comm ~ "*sh"
prev_comm ~ "sh*"
prev_comm ~ "*sh*"
-
-But does not allow for it to be within the string:
-
- prev_comm ~ "ba*sh" <-- is invalid
+ prev_comm ~ "ba*sh"
5.2 Setting filters
-------------------
diff --git a/Documentation/trace/ftrace.txt b/Documentation/trace/ftrace.txt
index 185c39fea2a0..1bc66c1db0cb 100644
--- a/Documentation/trace/ftrace.txt
+++ b/Documentation/trace/ftrace.txt
@@ -2218,16 +2218,13 @@ hrtimer_interrupt
sys_nanosleep
-Perhaps this is not enough. The filters also allow simple wild
-cards. Only the following are currently available
+Perhaps this is not enough. The filters also allow glob(7) matching.
<match>* - will match functions that begin with <match>
*<match> - will match functions that end with <match>
*<match>* - will match functions that have <match> in it
-
-These are the only wild cards which are supported.
-
- <match>*<match> will not work.
+ <match1>*<match2> - will match functions that begin with
+ <match1> and end with <match2>
Note: It is better to use quotes to enclose the wild cards,
otherwise the shell may expand the parameters into names