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thin: read table line with thin device id

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Add functions to parse thin table line to
obtain thin device id.
This commit is contained in:
Zdenek Kabelac 2013-12-04 13:57:27 +01:00
parent cf7f451238
commit 572983d793
5 changed files with 77 additions and 0 deletions
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1
WHATS_NEW
View File

@ -1,5 +1,6 @@
Version 2.02.105 -
=====================================
Add support to read thin device id from table line entry.
Drop extra test for origin when testing merging origin in lv_refresh().
Extend lv_remove_single() to not print info about removed LV.
Replace open_count check with lv_check_not_in_use() for snapshot open test.

22
lib/activate/activate.c
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@ -1051,6 +1051,28 @@ int lv_thin_pool_transaction_id(const struct logical_volume *lv,
return r;
}
int lv_thin_device_id(const struct logical_volume *lv, uint32_t *device_id)
{
int r;
struct dev_manager *dm;
if (!activation())
return 0;
log_debug_activation("Checking device id 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_device_id(dm, lv, device_id)))
stack;
dev_manager_destroy(dm);
return r;
}
static int _lv_active(struct cmd_context *cmd, const struct logical_volume *lv)
{
struct lvinfo info;

1
lib/activate/activate.h
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@ -140,6 +140,7 @@ int lv_thin_percent(const struct logical_volume *lv, int mapped,
percent_t *percent);
int lv_thin_pool_transaction_id(const struct logical_volume *lv,
uint64_t *transaction_id);
int lv_thin_device_id(const struct logical_volume *lv, uint32_t *device_id);
/*
* Return number of LVs in the VG that are active.

50
lib/activate/dev_manager.c
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@ -1313,6 +1313,56 @@ int dev_manager_thin_percent(struct dev_manager *dm,
return 1;
}
int dev_manager_thin_device_id(struct dev_manager *dm,
const struct logical_volume *lv,
uint32_t *device_id)
{
const char *dlid;
struct dm_task *dmt;
struct dm_info info;
uint64_t start, length;
char *params, *target_type = NULL;
int r = 0;
/* Build dlid for the thin layer */
if (!(dlid = build_dm_uuid(dm->mem, lv->lvid.s, lv_layer(lv))))
return_0;
log_debug_activation("Getting device id for %s.", dlid);
if (!(dmt = _setup_task(NULL, dlid, 0, DM_DEVICE_TABLE, 0, 0)))
return_0;
if (!dm_task_run(dmt))
goto_out;
if (!dm_task_get_info(dmt, &info) || !info.exists)
goto_out;
if (dm_get_next_target(dmt, NULL, &start, &length,
&target_type, &params)) {
log_error("More then one table line found for %s.", lv->name);
goto out;
}
if (strcmp(target_type, "thin")) {
log_error("Unexpected target type %s found for thin %s.", target_type, lv->name);
goto out;
}
if (sscanf(params, "%*u:%*u %u", device_id) != 1) {
log_error("Cannot parse table like parameters %s for %s.", params, lv->name);
goto out;
}
r = 1;
out:
dm_task_destroy(dmt);
return r;
}
/*************************/
/* NEW CODE STARTS HERE */
/*************************/

3
lib/activate/dev_manager.h
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@ -70,6 +70,9 @@ int dev_manager_thin_pool_percent(struct dev_manager *dm,
int dev_manager_thin_percent(struct dev_manager *dm,
const struct logical_volume *lv,
int mapped, percent_t *percent);
int dev_manager_thin_device_id(struct dev_manager *dm,
const struct logical_volume *lv,
uint32_t *device_id);
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,