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storage: Forbid to shrink the vol's capacity if no --shrink is specified

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As the document for "virsh-resize" says:
<...>
Attempts to shrink the volume will fail unless I<--shrink> is present;
</...>

This makes sense as it at least prevent the user shrinking the important
data of volume without a notice.
This commit is contained in:
Osier Yang 2013-05-31 13:16:15 +08:00
parent aa2a4cff7c
commit 38b90e4df3
1 changed files with 10 additions and 1 deletions
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11
src/storage/storage_driver.c
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@ -1762,7 +1762,8 @@ storageVolResize(virStorageVolPtr obj,
int ret = -1; int ret = -1;
virCheckFlags(VIR_STORAGE_VOL_RESIZE_ALLOCATE | virCheckFlags(VIR_STORAGE_VOL_RESIZE_ALLOCATE |
VIR_STORAGE_VOL_RESIZE_DELTA, -1); VIR_STORAGE_VOL_RESIZE_DELTA |
VIR_STORAGE_VOL_RESIZE_SHRINK, -1);
storageDriverLock(driver); storageDriverLock(driver);
pool = virStoragePoolObjFindByName(&driver->pools, obj->pool); pool = virStoragePoolObjFindByName(&driver->pools, obj->pool);
@ -1814,6 +1815,14 @@ storageVolResize(virStorageVolPtr obj,
goto out; goto out;
} }
if (abs_capacity < vol->capacity &&
!(flags & VIR_STORAGE_VOL_RESIZE_SHRINK)) {
virReportError(VIR_ERR_INVALID_ARG, "%s",
_("Can't shrink capacity below current "
"capacity with shrink flag explicitly specified"));
goto out;
}
if (abs_capacity > vol->capacity + pool->def->available) { if (abs_capacity > vol->capacity + pool->def->available) {
virReportError(VIR_ERR_OPERATION_FAILED, "%s", virReportError(VIR_ERR_OPERATION_FAILED, "%s",
_("Not enough space left on storage pool")); _("Not enough space left on storage pool"));