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storage: Error out earlier if the volume target path already exists

Browse Source 
https://bugzilla.redhat.com/show_bug.cgi?id=832302

It's odd to fall through to buildVol, and the existed file is
removed when buildVol fails. This checks if the volume target
path already exists in createVol. The reason for not using
error like "Volume already exists" is that there isn't volume
maintained by libvirt for the path until a operation like
pool-refresh, using error like that will just cause confusion.
(cherry picked from commit d1f3d14974b4213193130d4b01d4449ad1533cbb)
This commit is contained in:
Osier Yang 2012-12-05 12:44:11 +08:00 committed by Cole Robinson
parent 9774343564
commit 9b625cbcf0
1 changed files with 7 additions and 0 deletions
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7
src/storage/storage_backend_fs.c
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@ -1006,6 +1006,13 @@ virStorageBackendFileSystemVolCreate(virConnectPtr conn ATTRIBUTE_UNUSED,
return -1;
}
if (virFileExists(vol->target.path)) {
virReportError(VIR_ERR_OPERATION_INVALID,
_("volume target path '%s' already exists"),
vol->target.path);
return -1;
}
VIR_FREE(vol->key);
vol->key = strdup(vol->target.path);
if (vol->key == NULL) {