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skip indexing devices used by LVs in more commands

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expands commit d5a06f9a7d
  "pvscan: skip indexing devices used by LVs"

The dev cache index is expensive and slow, so limit it
to commands that are used to observe the state of lvm.
The index is only used to print warnings about incorrect
device use by active LVs, e.g. if an LV is using a
multipath component device instead of the multipath
device.  Commands that continue to use the index and
print the warnings:

  fullreport, lvmdiskscan, vgs, lvs, pvs,
  vgdisplay, lvdisplay, pvdisplay,
  vgscan, lvscan, pvscan (excluding --cache)

A couple other commands were borrowing the DEV_USED_FOR_LV
flag to just check if a device was actively in use by LVs.
These are converted to the new dev_is_used_by_active_lv().
This commit is contained in:
David Teigland
2021-07-07 16:59:56 -05:00
parent 70c32d1e74
commit 66daedc6d2
11 changed files with 146 additions and 22 deletions
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4
lib/device/dev-cache.c
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@@ -412,7 +412,7 @@ out:
return r;
}
static int _get_dm_uuid_from_sysfs(char *buf, size_t buf_size, int major, int minor)
int get_dm_uuid_from_sysfs(char *buf, size_t buf_size, int major, int minor)
{
char path[PATH_MAX];
@@ -533,7 +533,7 @@ static int _get_vgid_and_lvid_for_dev(struct device *dev)
char uuid[DM_UUID_LEN];
size_t uuid_len;
if (!_get_dm_uuid_from_sysfs(uuid, sizeof(uuid), (int) MAJOR(dev->dev), (int) MINOR(dev->dev)))
if (!get_dm_uuid_from_sysfs(uuid, sizeof(uuid), (int) MAJOR(dev->dev), (int) MINOR(dev->dev)))
return_0;
uuid_len = strlen(uuid);