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-rw-r--r--Documentation/device-mapper/statistics.txt4
-rw-r--r--drivers/md/dm-stats.c14
-rw-r--r--include/uapi/linux/dm-ioctl.h4
3 files changed, 19 insertions, 3 deletions
diff --git a/Documentation/device-mapper/statistics.txt b/Documentation/device-mapper/statistics.txt
index 4919b2dfd1b3..6f5ef944ca4c 100644
--- a/Documentation/device-mapper/statistics.txt
+++ b/Documentation/device-mapper/statistics.txt
@@ -121,6 +121,10 @@ Messages
Output format:
<region_id>: <start_sector>+<length> <step> <program_id> <aux_data>
+ precise_timestamps histogram:n1,n2,n3,...
+
+ The strings "precise_timestamps" and "histogram" are printed only
+ if they were specified when creating the region.
@stats_print <region_id> [<starting_line> <number_of_lines>]
diff --git a/drivers/md/dm-stats.c b/drivers/md/dm-stats.c
index 8a8b48fa901a..8289804ccd99 100644
--- a/drivers/md/dm-stats.c
+++ b/drivers/md/dm-stats.c
@@ -457,12 +457,24 @@ static int dm_stats_list(struct dm_stats *stats, const char *program,
list_for_each_entry(s, &stats->list, list_entry) {
if (!program || !strcmp(program, s->program_id)) {
len = s->end - s->start;
- DMEMIT("%d: %llu+%llu %llu %s %s\n", s->id,
+ DMEMIT("%d: %llu+%llu %llu %s %s", s->id,
(unsigned long long)s->start,
(unsigned long long)len,
(unsigned long long)s->step,
s->program_id,
s->aux_data);
+ if (s->stat_flags & STAT_PRECISE_TIMESTAMPS)
+ DMEMIT(" precise_timestamps");
+ if (s->n_histogram_entries) {
+ unsigned i;
+ DMEMIT(" histogram:");
+ for (i = 0; i < s->n_histogram_entries; i++) {
+ if (i)
+ DMEMIT(",");
+ DMEMIT("%llu", s->histogram_boundaries[i]);
+ }
+ }
+ DMEMIT("\n");
}
}
mutex_unlock(&stats->mutex);
diff --git a/include/uapi/linux/dm-ioctl.h b/include/uapi/linux/dm-ioctl.h
index 061aca3a962d..d34611e35a30 100644
--- a/include/uapi/linux/dm-ioctl.h
+++ b/include/uapi/linux/dm-ioctl.h
@@ -267,9 +267,9 @@ enum {
#define DM_DEV_SET_GEOMETRY _IOWR(DM_IOCTL, DM_DEV_SET_GEOMETRY_CMD, struct dm_ioctl)
#define DM_VERSION_MAJOR 4
-#define DM_VERSION_MINOR 32
+#define DM_VERSION_MINOR 33
#define DM_VERSION_PATCHLEVEL 0
-#define DM_VERSION_EXTRA "-ioctl (2015-6-26)"
+#define DM_VERSION_EXTRA "-ioctl (2015-8-18)"
/* Status bits */
#define DM_READONLY_FLAG (1 << 0) /* In/Out */