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dmstats: cleanup _do_stats_create_regions()

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Make the use of the this_start and this_len variables easier to
follow and clarify the use of zero start and len arguments to
request a whole-device region.
This commit is contained in:
Bryn M. Reeves
2015-08-13 20:54:21 +01:00
parent 9b3dc72506
commit f10ad95c36
1 changed files with 6 additions and 4 deletions
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10
tools/dmsetup.c
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@@ -4381,7 +4381,9 @@ static uint64_t _nr_areas_from_step(uint64_t len, int64_t step)
/*
* Create a single region starting at start and spanning len sectors,
* or, if the segments argument is no-zero create one region for each
* segment present in the mapped device.
* segment present in the mapped device. Passing zero for segments,
* start, and length will create a single segment spanning the whole
* device.
*/
static int _do_stats_create_regions(struct dm_stats *dms,
const char *name, uint64_t start,
@@ -4390,7 +4392,7 @@ static int _do_stats_create_regions(struct dm_stats *dms,
const char *program_id,
const char *aux_data)
{
uint64_t this_start = start, this_len = len, region_id = UINT64_C(0);
uint64_t this_start, this_len, region_id = UINT64_C(0);
char *target_type, *params; /* unused */
struct dm_task *dmt;
struct dm_info info;
@@ -4439,8 +4441,8 @@ static int _do_stats_create_regions(struct dm_stats *dms,
* --start/--length arguments, or 0/0 for a default
* whole-device region).
*/
this_start = (segments) ? segment_start : this_start;
this_len = (segments) ? segment_len : this_len;
this_start = (segments) ? segment_start : start;
this_len = (segments) ? segment_len : len;
if (!dm_stats_create_region(dms, &region_id,
this_start, this_len, step,
program_id, aux_data)) {