From: Dmitry Monakhov <dmonakhov@gmail.com>
To: linux-ext4@vger.kernel.org
Cc: darrick.wong@oracle.com, tytso@mit.edu,
Dmitry Monakhov <dmonakhov@gmail.com>
Subject: [PATCH 1/2] ext4: fix symbolic enum printing in trace output
Date: Thu, 14 Nov 2019 20:01:46 +0000 [thread overview]
Message-ID: <20191114200147.1073-1-dmonakhov@gmail.com> (raw)
Trace's macro __print_flags() produce raw event's decraration w/o knowing actual
flags value
cat /sys/kernel/debug/tracing/events/ext4/ext4_ext_map_blocks_exit/format
..
__print_flags(REC->mflags, "", { (1 << BH_New),
For that reason we have to explicitly define it via special macro TRACE_DEFINE_ENUM()
Also add missed EXTENT_STATUS_REFERENCED flag.
#Before patch
ext4:ext4_ext_map_blocks_exit: dev 253,0 ino 2 flags lblk 0 pblk 4177 len 1 mflags 0x20 ret 1
ext4:ext4_ext_map_blocks_exit: dev 253,0 ino 12 flags CREATE lblk 0 pblk 34304 len 1 mflags 0x60 ret 1
#With patch
ext4:ext4_ext_map_blocks_exit: dev 253,0 ino 2 flags lblk 0 pblk 4177 len 1 mflags M ret 1
ext4:ext4_ext_map_blocks_exit: dev 253,0 ino 12 flags CREATE lblk 0 pblk 34816 len 1 mflags NM ret 1
Signed-off-by: Dmitry Monakhov <dmonakhov@gmail.com>
---
include/trace/events/ext4.h | 19 ++++++++++++++++++-
1 file changed, 18 insertions(+), 1 deletion(-)
diff --git a/include/trace/events/ext4.h b/include/trace/events/ext4.h
index 182c9fe..3bf7128 100644
--- a/include/trace/events/ext4.h
+++ b/include/trace/events/ext4.h
@@ -48,6 +48,16 @@ struct partial_cluster;
{ EXT4_GET_BLOCKS_KEEP_SIZE, "KEEP_SIZE" }, \
{ EXT4_GET_BLOCKS_ZERO, "ZERO" })
+/*
+ * __print_flags() requires that all enum values be wrapped in the
+ * TRACE_DEFINE_ENUM macro so that the enum value can be encoded in the ftrace
+ * ring buffer.
+ */
+TRACE_DEFINE_ENUM(BH_New);
+TRACE_DEFINE_ENUM(BH_Mapped);
+TRACE_DEFINE_ENUM(BH_Unwritten);
+TRACE_DEFINE_ENUM(BH_Boundary);
+
#define show_mflags(flags) __print_flags(flags, "", \
{ EXT4_MAP_NEW, "N" }, \
{ EXT4_MAP_MAPPED, "M" }, \
@@ -62,11 +72,18 @@ struct partial_cluster;
{ EXT4_FREE_BLOCKS_NOFREE_FIRST_CLUSTER,"1ST_CLUSTER" },\
{ EXT4_FREE_BLOCKS_NOFREE_LAST_CLUSTER, "LAST_CLUSTER" })
+TRACE_DEFINE_ENUM(ES_WRITTEN_B);
+TRACE_DEFINE_ENUM(ES_UNWRITTEN_B);
+TRACE_DEFINE_ENUM(ES_DELAYED_B);
+TRACE_DEFINE_ENUM(ES_HOLE_B);
+TRACE_DEFINE_ENUM(ES_REFERENCED_B);
+
#define show_extent_status(status) __print_flags(status, "", \
{ EXTENT_STATUS_WRITTEN, "W" }, \
{ EXTENT_STATUS_UNWRITTEN, "U" }, \
{ EXTENT_STATUS_DELAYED, "D" }, \
- { EXTENT_STATUS_HOLE, "H" })
+ { EXTENT_STATUS_HOLE, "H" }, \
+ { EXTENT_STATUS_REFERENCED, "R" })
#define show_falloc_mode(mode) __print_flags(mode, "|", \
{ FALLOC_FL_KEEP_SIZE, "KEEP_SIZE"}, \
--
2.7.4
next reply other threads:[~2019-11-14 20:01 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-14 20:01 Dmitry Monakhov [this message]
2019-11-14 20:01 ` [PATCH 2/2] ext4: fix extent_status trace points Dmitry Monakhov
2020-01-25 7:03 ` Theodore Y. Ts'o
2019-11-14 21:01 ` [PATCH 1/2] ext4: fix symbolic enum printing in trace output Darrick J. Wong
2020-01-25 7:03 ` Theodore Y. Ts'o
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