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devices: simpler bcache invalidation of PVs on LVs

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When a PV is stacked on an LV, the PV needs to be
dropped from bcache before the LV is processed.
The LV can be found in dev-cache using its name
rather than the devno.
This commit is contained in:
David Teigland 2024-06-28 18:04:25 -05:00
parent b8869e2d4e
commit 200b05cec0
2 changed files with 3 additions and 16 deletions
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6
lib/device/dev-cache.c
View File

@ -1366,17 +1366,13 @@ int dev_cache_update_dm_uuids(void)
return 1;
}
/* _cache.dm_devs entries are referenced by radix trees */
/* TODO: if _cache.dm_devs list is small, then skip the
overhead of radix trees and just do list searches on dm_devs */
if (!(_cache.dm_devnos = radix_tree_create(NULL, NULL)) ||
!(_cache.dm_uuids = radix_tree_create(NULL, NULL))) {
return_0; // FIXME
}
/* Insert every active DM device into radix trees */
/* _cache.dm_devs entries are referenced by radix trees */
dm_list_iterate_items(dm_dev, _cache.dm_devs) {
d = _shuffle_devno(dm_dev->devno);

13
lib/label/label.c
View File

@ -1642,19 +1642,10 @@ void label_scan_invalidate(struct device *dev)
void label_scan_invalidate_lv(struct cmd_context *cmd, struct logical_volume *lv)
{
struct lvinfo lvinfo;
struct device *dev;
dev_t devt;
/* FIXME: use dev_cache_get_existing() with the lv name,
which allow us to skip the getting devno from lv_info. */
if (lv_info(cmd, lv, 0, &lvinfo, 0, 0) && lvinfo.exists) {
/* FIXME: Still unclear what is it supposed to find */
devt = MKDEV(lvinfo.major, lvinfo.minor);
if ((dev = dev_cache_get_by_devt(cmd, devt)))
label_scan_invalidate(dev);
}
if ((dev = dev_cache_get_existing(cmd, display_lvname(lv), NULL)))
label_scan_invalidate(dev);
}
void label_scan_invalidate_lvs(struct cmd_context *cmd, struct dm_list *lvs)