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Thin add function to read thin volume percent

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This value returns percentage of 'mapped' size compared with total LV size.
(Without passed seg pointer it return highest mapped size - but it's
not used yet.)
This commit is contained in:
Zdenek Kabelac 2012-01-19 15:27:54 +00:00
parent 9fae965546
commit 491d106031
5 changed files with 84 additions and 0 deletions
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26
lib/activate/activate.c
View File

@ -736,6 +736,32 @@ int lv_thin_pool_percent(const struct logical_volume *lv, int metadata,
return r;
}
/*
* Returns 1 if percent set, else 0 on failure.
*/
int lv_thin_percent(const struct logical_volume *lv,
int mapped, percent_t *percent)
{
int r;
struct dev_manager *dm;
if (!activation())
return 0;
log_debug("Checking thin percent for LV %s/%s",
lv->vg->name, lv->name);
if (!(dm = dev_manager_create(lv->vg->cmd, lv->vg->name, 1)))
return_0;
if (!(r = dev_manager_thin_percent(dm, lv, mapped, percent)))
stack;
dev_manager_destroy(dm);
return r;
}
static int _lv_active(struct cmd_context *cmd, struct logical_volume *lv)
{
struct lvinfo info;

2
lib/activate/activate.h
View File

@ -103,6 +103,8 @@ int lv_mirror_percent(struct cmd_context *cmd, const struct logical_volume *lv,
int lv_raid_percent(const struct logical_volume *lv, percent_t *percent);
int lv_thin_pool_percent(const struct logical_volume *lv, int metadata,
percent_t *percent);
int lv_thin_percent(const struct logical_volume *lv, int mapped,
percent_t *percent);
/*
* Return number of LVs in the VG that are active.

22
lib/activate/dev_manager.c
View File

@ -895,6 +895,28 @@ int dev_manager_thin_pool_percent(struct dev_manager *dm,
return 1;
}
int dev_manager_thin_percent(struct dev_manager *dm,
const struct logical_volume *lv,
int mapped, percent_t *percent)
{
char *name;
const char *dlid;
/* Build a name for the top layer */
if (!(name = dm_build_dm_name(dm->mem, lv->vg->name, lv->name, NULL)))
return_0;
if (!(dlid = build_dm_uuid(dm->mem, lv->lvid.s, NULL)))
return_0;
log_debug("Getting device status percentage for %s", name);
if (!(_percent(dm, name, dlid, "thin", 0,
(mapped) ? NULL : lv, percent, NULL, 1)))
return_0;
return 1;
}
/*************************/
/* NEW CODE STARTS HERE */
/*************************/

3
lib/activate/dev_manager.h
View File

@ -57,6 +57,9 @@ int dev_manager_mirror_percent(struct dev_manager *dm,
int dev_manager_thin_pool_percent(struct dev_manager *dm,
const struct logical_volume *lv,
int metadata, percent_t *percent);
int dev_manager_thin_percent(struct dev_manager *dm,
const struct logical_volume *lv,
int mapped, percent_t *percent);
int dev_manager_suspend(struct dev_manager *dm, struct logical_volume *lv,
struct lv_activate_opts *laopts, int lockfs, int flush_required);
int dev_manager_activate(struct dev_manager *dm, struct logical_volume *lv,

31
lib/thin/thin.c
View File

@ -409,6 +409,36 @@ static int _thin_add_target_line(struct dev_manager *dm,
return 1;
}
static int _thin_target_percent(void **target_state __attribute__((unused)),
percent_t *percent,
struct dm_pool *mem,
struct cmd_context *cmd __attribute__((unused)),
struct lv_segment *seg,
char *params,
uint64_t *total_numerator,
uint64_t *total_denominator)
{
struct dm_status_thin *s;
/* Status for thin device is in sectors */
if (!dm_get_status_thin(mem, params, &s))
return_0;
if (seg) {
*percent = make_percent(s->mapped_sectors, seg->lv->size);
*total_denominator += seg->lv->size;
} else {
/* No lv_segment info here */
*percent = PERCENT_INVALID;
/* FIXME: Using denominator to pass the mapped info upward? */
*total_denominator += s->highest_mapped_sector;
}
*total_numerator += s->mapped_sectors;
return 1;
}
static int _thin_target_present(struct cmd_context *cmd,
const struct lv_segment *seg,
unsigned *attributes __attribute__((unused)))
@ -499,6 +529,7 @@ static struct segtype_handler _thin_ops = {
.text_export = _thin_text_export,
#ifdef DEVMAPPER_SUPPORT
.add_target_line = _thin_add_target_line,
.target_percent = _thin_target_percent,
.target_present = _thin_target_present,
# ifdef DMEVENTD
.target_monitored = _target_registered,