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ability to keep track of outdated pvs in lvmcache

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Outdated PVs hold metadata for VG from which they
have been removed.  Add the ability to keep track
of these in lvmcache.
This will be used for more advanced repair in a
subsequent commit.
This commit is contained in:
David Teigland
2019-02-05 12:55:51 -06:00
parent 650524b955
commit 0b18c25d93
2 changed files with 95 additions and 0 deletions
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80
lib/cache/lvmcache.c vendored
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@@ -48,6 +48,7 @@ struct lvmcache_info {
struct lvmcache_vginfo {
struct dm_list list; /* Join these vginfos together */
struct dm_list infos; /* List head for lvmcache_infos */
struct dm_list outdated_infos; /* vg_read moves info from infos to outdated_infos */
const struct format_type *fmt;
char *vgname; /* "" == orphan */
uint32_t status;
@@ -1389,6 +1390,7 @@ static int _lvmcache_update_vgname(struct lvmcache_info *info,
return 0;
}
dm_list_init(&vginfo->infos);
dm_list_init(&vginfo->outdated_infos);
/*
* A different VG (different uuid) can exist with the same name.
@@ -2392,3 +2394,81 @@ struct metadata_area *lvmcache_get_mda(struct cmd_context *cmd,
return NULL;
}
void lvmcache_get_outdated_devs(struct cmd_context *cmd,
const char *vgname, const char *vgid,
struct dm_list *devs)
{
struct lvmcache_vginfo *vginfo;
struct lvmcache_info *info;
struct device_list *devl;
if (!(vginfo = lvmcache_vginfo_from_vgname(vgname, vgid))) {
log_error(INTERNAL_ERROR "lvmcache_get_outdated_devs no vginfo %s", vgname);
return;
}
dm_list_iterate_items(info, &vginfo->outdated_infos) {
if (!(devl = zalloc(sizeof(*devl))))
return;
devl->dev = info->dev;
dm_list_add(devs, &devl->list);
}
}
void lvmcache_del_outdated_devs(struct cmd_context *cmd,
const char *vgname, const char *vgid)
{
struct lvmcache_vginfo *vginfo;
struct lvmcache_info *info, *info2;
if (!(vginfo = lvmcache_vginfo_from_vgname(vgname, vgid))) {
log_error(INTERNAL_ERROR "lvmcache_get_outdated_devs no vginfo");
return;
}
dm_list_iterate_items_safe(info, info2, &vginfo->outdated_infos)
lvmcache_del(info);
}
void lvmcache_get_outdated_mdas(struct cmd_context *cmd,
const char *vgname, const char *vgid,
struct device *dev,
struct dm_list **mdas)
{
struct lvmcache_vginfo *vginfo;
struct lvmcache_info *info;
*mdas = NULL;
if (!(vginfo = lvmcache_vginfo_from_vgname(vgname, vgid))) {
log_error(INTERNAL_ERROR "lvmcache_get_outdated_mdas no vginfo");
return;
}
dm_list_iterate_items(info, &vginfo->outdated_infos) {
if (info->dev != dev)
continue;
*mdas = &info->mdas;
return;
}
}
bool lvmcache_is_outdated_dev(struct cmd_context *cmd,
const char *vgname, const char *vgid,
struct device *dev)
{
struct lvmcache_vginfo *vginfo;
struct lvmcache_info *info;
if (!(vginfo = lvmcache_vginfo_from_vgname(vgname, vgid))) {
log_error(INTERNAL_ERROR "lvmcache_get_outdated_mdas no vginfo");
return false;
}
dm_list_iterate_items(info, &vginfo->outdated_infos) {
if (info->dev == dev)
return true;
}
return false;
}