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authorShawn Du <duyuyang@gmail.com>2009-04-14 13:58:56 +0800
committerIngo Molnar <mingo@elte.hu>2009-04-16 10:10:57 +0200
commitd0deef5b14af7d5bbd0003a0a2a1a32326e20a6d (patch)
treede1d438935a4cc50dd9d7e0ccccc3cfc5c7e6c06 /include
parent9cfe06f8cd5c8c3ad6ab323973e87dde670642b8 (diff)
blktrace: support per-partition tracing
Though one can specify '-d /dev/sda1' when using blktrace, it still traces the whole sda. To support per-partition tracing, when we start tracing, we initialize bt->start_lba and bt->end_lba to the start and end sector of that partition. Note some actions are per device, thus we don't filter 0-sector events. The original patch and discussion can be found here: http://marc.info/?l=linux-btrace&m=122949374214540&w=2 Signed-off-by: Shawn Du <duyuyang@gmail.com> Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> Acked-by: "Theodore Ts'o" <tytso@mit.edu> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Jens Axboe <jens.axboe@oracle.com> LKML-Reference: <49E42620.4050701@cn.fujitsu.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include')
-rw-r--r--include/linux/blktrace_api.h24
1 files changed, 13 insertions, 11 deletions
diff --git a/include/linux/blktrace_api.h b/include/linux/blktrace_api.h
index d960889e92ef..267edc4017ee 100644
--- a/include/linux/blktrace_api.h
+++ b/include/linux/blktrace_api.h
@@ -165,8 +165,9 @@ struct blk_trace {
extern int blk_trace_ioctl(struct block_device *, unsigned, char __user *);
extern void blk_trace_shutdown(struct request_queue *);
-extern int do_blk_trace_setup(struct request_queue *q,
- char *name, dev_t dev, struct blk_user_trace_setup *buts);
+extern int do_blk_trace_setup(struct request_queue *q, char *name,
+ dev_t dev, struct block_device *bdev,
+ struct blk_user_trace_setup *buts);
extern void __trace_note_message(struct blk_trace *, const char *fmt, ...);
/**
@@ -193,6 +194,7 @@ extern void __trace_note_message(struct blk_trace *, const char *fmt, ...);
extern void blk_add_driver_data(struct request_queue *q, struct request *rq,
void *data, size_t len);
extern int blk_trace_setup(struct request_queue *q, char *name, dev_t dev,
+ struct block_device *bdev,
char __user *arg);
extern int blk_trace_startstop(struct request_queue *q, int start);
extern int blk_trace_remove(struct request_queue *q);
@@ -200,15 +202,15 @@ extern int blk_trace_remove(struct request_queue *q);
extern struct attribute_group blk_trace_attr_group;
#else /* !CONFIG_BLK_DEV_IO_TRACE */
-#define blk_trace_ioctl(bdev, cmd, arg) (-ENOTTY)
-#define blk_trace_shutdown(q) do { } while (0)
-#define do_blk_trace_setup(q, name, dev, buts) (-ENOTTY)
-#define blk_add_driver_data(q, rq, data, len) do {} while (0)
-#define blk_trace_setup(q, name, dev, arg) (-ENOTTY)
-#define blk_trace_startstop(q, start) (-ENOTTY)
-#define blk_trace_remove(q) (-ENOTTY)
-#define blk_add_trace_msg(q, fmt, ...) do { } while (0)
-
+# define blk_trace_ioctl(bdev, cmd, arg) (-ENOTTY)
+# define blk_trace_shutdown(q) do { } while (0)
+# define do_blk_trace_setup(q, name, dev, bdev, buts) (-ENOTTY)
+# define blk_add_driver_data(q, rq, data, len) do {} while (0)
+# define blk_trace_setup(q, name, dev, bdev, arg) (-ENOTTY)
+# define blk_trace_startstop(q, start) (-ENOTTY)
+# define blk_trace_remove(q) (-ENOTTY)
+# define blk_add_trace_msg(q, fmt, ...) do { } while (0)
#endif /* CONFIG_BLK_DEV_IO_TRACE */
+
#endif /* __KERNEL__ */
#endif