[lvm-devel] stable-2.02 - pvscan: use orphans lock to fix parallel pvscan and vgcreate
David Teigland
teigland at sourceware.org
Fri Aug 20 14:42:50 UTC 2021
Gitweb: https://sourceware.org/git/?p=lvm2.git;a=commitdiff;h=90597a4b6e4fc471a8f14cf5ca30f54387a80f3d
Commit: 90597a4b6e4fc471a8f14cf5ca30f54387a80f3d
Parent: 1afa67f4b9bdeb1e0da1cda17695d0aa58f7c3e3
Author: Wu Guanghao <wuguanghao3 at huawei.com>
AuthorDate: Thu Aug 19 09:30:08 2021 -0500
Committer: David Teigland <teigland at redhat.com>
CommitterDate: Fri Aug 20 09:42:37 2021 -0500
pvscan: use orphans lock to fix parallel pvscan and vgcreate
start pvscan --cache /dev/sdb
(read metadata from disk, no vg info)
pvcreate /dev/sdb
vgcreate vg /dev/sdb
(write vg information to metadata, and update lvmetad)
finish pvscan --cache /dev/sdb
(No vg information in metadata from disk, overwrite lvmetad)
vgs
couldn't find vg
Signed-off-by: Wu Guanghao <wuguanghao3 at huawei.com>
---
tools/pvscan.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/tools/pvscan.c b/tools/pvscan.c
index 2e7a864de..51b5daa9a 100644
--- a/tools/pvscan.c
+++ b/tools/pvscan.c
@@ -491,6 +491,11 @@ static int _pvscan_cache(struct cmd_context *cmd, int argc, char **argv)
return ECMD_FAILED;
}
+ if (!lock_vol(cmd, VG_ORPHANS, LCK_VG_READ, NULL)) {
+ log_error("Can't get lock for orphan PVs.");
+ return ECMD_FAILED;
+ }
+
/*
* This a special case where use_lvmetad=1 in lvm.conf but pvscan
* cannot use lvmetad for some reason. In this case pvscan should
@@ -780,6 +785,7 @@ out:
if (!sync_local_dev_names(cmd))
stack;
+ unlock_vg(cmd, NULL, VG_ORPHANS);
unlock_vg(cmd, NULL, VG_GLOBAL);
return ret;
}
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