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thin: display highest mapped sector

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Use  meta%  to expose highest mapped sector in thinLV.
so showing there 100.00% means thinLV maps latest sector.

Currently using a 'trick' with total_numerator to pass-in
device size when  'seg==NULL'

TODO: Improve device status API per target - current 'percentage'
is not really extensible.
This commit is contained in:
Zdenek Kabelac 2016-03-30 11:14:13 +02:00
parent 8bbec41bd4
commit fc7dacaa4c
3 changed files with 14 additions and 6 deletions
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1
WHATS_NEW
View File

@ -1,5 +1,6 @@
Version 2.02.149 -
==================================
Report highest mapping for thin volume as Meta%.
Do not flush thin-pool when checking metadata fullness.
Remove spurious error about no value in /sys/dev/block/major:minor/dm/uuid.
Fix device mismatch detection for LV if persistent .cache file is used.

4
lib/activate/dev_manager.c
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@ -938,6 +938,10 @@ static int _percent_run(struct dev_manager *dm, const char *name,
if (!segtype->ops->target_percent)
continue;
/* For thin volume pass device size via 'total_numerator' */
if (!seg && segtype_is_thin_volume(segtype))
total_numerator = length - 1; /* highest mapped is 0 .. (length - 1) */
if (!segtype->ops->target_percent(&dm->target_state,
&percent, dm->mem,
dm->cmd, seg, params,

15
lib/thin/thin.c
View File

@ -613,7 +613,7 @@ static int _thin_add_target_line(struct dev_manager *dm,
static int _thin_target_percent(void **target_state __attribute__((unused)),
dm_percent_t *percent,
struct dm_pool *mem,
struct cmd_context *cmd __attribute__((unused)),
struct cmd_context *cmd,
struct lv_segment *seg,
char *params,
uint64_t *total_numerator,
@ -643,15 +643,18 @@ static int _thin_target_percent(void **target_state __attribute__((unused)),
*percent = dm_make_percent(s->mapped_sectors, csize);
*total_denominator += csize;
*total_numerator += s->mapped_sectors;
} else {
/* No lv_segment info here */
*percent = DM_PERCENT_INVALID;
/* FIXME: Using denominator to pass the mapped info upward? */
/* Using denominator to pass the mapped info upward? */
if (s->highest_mapped_sector > *total_numerator) {
log_warn("WARNING: highest mapped sector %s is above device size.",
display_size(cmd, s->highest_mapped_sector));
s->highest_mapped_sector = *total_numerator;
}
*percent = dm_make_percent(s->highest_mapped_sector, *total_numerator);
*total_denominator += s->highest_mapped_sector;
}
*total_numerator += s->mapped_sectors;
return 1;
}