于 2011年11月18日 19:15, Osier Yang 写道:
lvs outputs "[$lvname_vorigin]" for the virtual snapshot lv
(created with "--virtualsize"), and the original device pointed
by "$lvname_vorigin" is just for lvm internal use, one should
never use it.
Forgot to mention the problem. If one creates a virtual snapshot lv,
the pool won't be abled to started or refreshed.
Per lvm's nameing rules, "[" is not valid as part of the vg/lv name.
(man 8 lvm).
<quote>
VALID NAMES
The following characters are valid for VG and LV names: a-z A-Z 0-9 + _
. -
VG and LV names cannot begin with a hyphen. There are also various
reserved names that are used internally by lvm that can not be used as
LV or VG names. A VG cannot be called anything that exists in /dev/ at
the time of creation, nor can it be called '.' or '..'. A LV cannot be
called '.' '..' 'snapshot' or 'pvmove'. The LV name may also not con‐
tain the strings '_mlog' or '_mimage'
</quote>
So we can skip the set the lv's backingStore by checking if the name
begins with a "[".
---
src/storage/storage_backend_logical.c | 9 ++++++++-
1 files changed, 8 insertions(+), 1 deletions(-)
diff --git a/src/storage/storage_backend_logical.c b/src/storage/storage_backend_logical.c
index 3c3e736..8118d08 100644
--- a/src/storage/storage_backend_logical.c
+++ b/src/storage/storage_backend_logical.c
@@ -121,7 +121,14 @@ virStorageBackendLogicalMakeVol(virStoragePoolObjPtr pool,
}
}
- if (groups[1]&& !STREQ(groups[1], "")) {
+ /* Skips the backingStore of lv created with "--virtualsize",
+ * its original device "/dev/$vgname/$lvname_vorigin" is
+ * just for lvm internal use, one should never use it.
+ *
+ * (lvs outputs "[$lvname_vorigin] for field "origin" if the
+ * lv is created with "--virtualsize").
+ */
+ if (groups[1]&& !STREQ(groups[1], "")&& (groups[1][0] != '[')) {
if (virAsprintf(&vol->backingStore.path, "%s/%s",
pool->def->target.path, groups[1])< 0) {
virReportOOMError();
--
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