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dev_manager: use list info for preset devs

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In some cases we can also use cached info obtained from DM_DEVICE_LIST
also to avoid extra ioctl check for present devices.
This commit is contained in:
Zdenek Kabelac 2022-02-16 00:33:32 +01:00
parent fa7b67eeeb
commit d4a0816a58
1 changed files with 14 additions and 8 deletions
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22
lib/activate/dev_manager.c
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@ -2254,6 +2254,7 @@ static int _add_dev_to_dtree(struct dev_manager *dm, struct dm_tree *dtree,
{
char *dlid, *name;
struct dm_info info, info2;
const struct dm_active_device *dev;
if (!(name = dm_build_dm_name(dm->mem, lv->vg->name, lv->name, layer)))
return_0;
@ -2262,15 +2263,20 @@ static int _add_dev_to_dtree(struct dev_manager *dm, struct dm_tree *dtree,
return_0;
if (!dm->cmd->disable_dm_devs &&
dm->cmd->cache_dm_devs &&
!dm_device_list_find_by_uuid(dm->cmd->cache_dm_devs, dlid, NULL)) {
log_debug("Cached as not present %s.", name);
return 1;
}
if (!_info(dm->cmd, name, dlid, 0, 0, 0, &info, NULL, NULL))
dm->cmd->cache_dm_devs) {
if (!dm_device_list_find_by_uuid(dm->cmd->cache_dm_devs, dlid, &dev)) {
log_debug("Cached as not present %s.", name);
return 1;
}
info = (struct dm_info) {
.exists = 1,
.major = dev->major,
.minor = dev->minor,
};
log_debug("Cached as present %s %s (%d:%d).",
name, dlid, info.major, info.minor);
} else if (!_info(dm->cmd, name, dlid, 0, 0, 0, &info, NULL, NULL))
return_0;
/*
* For top level volumes verify that existing device match
* requested major/minor and that major/minor pair is available for use