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Implement virStorageVolResize() for FS backend

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Currently only VIR_STORAGE_VOL_RESIZE_DELTA flag is supported.
This commit is contained in:
Zeeshan Ali (Khattak)
2012-01-30 02:40:00 -05:00
committed by Laine Stump
parent 055bbf45e4
commit e545dd4ffe
5 changed files with 166 additions and 1 deletions
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90
src/storage/storage_driver.c
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@@ -1,7 +1,7 @@
/*
* storage_driver.c: core driver for storage APIs
*
* Copyright (C) 2006-2011 Red Hat, Inc.
* Copyright (C) 2006-2012 Red Hat, Inc.
* Copyright (C) 2006-2008 Daniel P. Berrange
*
* This library is free software; you can redistribute it and/or
@@ -1695,7 +1695,94 @@ out:
return ret;
}
static int
storageVolumeResize(virStorageVolPtr obj,
unsigned long long capacity,
unsigned int flags)
{
virStorageDriverStatePtr driver = obj->conn->storagePrivateData;
virStorageBackendPtr backend;
virStoragePoolObjPtr pool = NULL;
virStorageVolDefPtr vol = NULL;
unsigned long long abs_capacity;
int ret = -1;
virCheckFlags(VIR_STORAGE_VOL_RESIZE_DELTA, -1);
storageDriverLock(driver);
pool = virStoragePoolObjFindByName(&driver->pools, obj->pool);
storageDriverUnlock(driver);
if (!pool) {
virStorageReportError(VIR_ERR_NO_STORAGE_POOL,
_("no storage pool with matching uuid"));
goto out;
}
if (!virStoragePoolObjIsActive(pool)) {
virStorageReportError(VIR_ERR_OPERATION_INVALID,
_("storage pool is not active"));
goto out;
}
if ((backend = virStorageBackendForType(pool->def->type)) == NULL)
goto out;
vol = virStorageVolDefFindByName(pool, obj->name);
if (vol == NULL) {
virStorageReportError(VIR_ERR_NO_STORAGE_VOL,
_("no storage vol with matching name '%s'"),
obj->name);
goto out;
}
if (vol->building) {
virStorageReportError(VIR_ERR_OPERATION_INVALID,
_("volume '%s' is still being allocated."),
vol->name);
goto out;
}
if (flags & VIR_STORAGE_VOL_RESIZE_DELTA) {
abs_capacity = vol->capacity + capacity;
flags &= ~VIR_STORAGE_VOL_RESIZE_DELTA;
} else {
abs_capacity = capacity;
}
if (abs_capacity < vol->allocation) {
virStorageReportError(VIR_ERR_INVALID_ARG,
_("can't shrink capacity below "
"existing allocation"));
goto out;
}
if (abs_capacity > vol->allocation + pool->def->available) {
virStorageReportError(VIR_ERR_INVALID_ARG,
_("Not enough space left on storage pool"));
goto out;
}
if (!backend->resizeVol) {
virStorageReportError(VIR_ERR_NO_SUPPORT,
_("storage pool does not support changing of "
"volume capacity"));
goto out;
}
if (backend->resizeVol(obj->conn, pool, vol, abs_capacity, flags) < 0)
goto out;
vol->capacity = abs_capacity;
ret = 0;
out:
if (pool)
virStoragePoolObjUnlock(pool);
return ret;
}
/* If the volume we're wiping is already a sparse file, we simply
* truncate and extend it to its original size, filling it with
@@ -2243,6 +2330,7 @@ static virStorageDriver storageDriver = {
.volGetInfo = storageVolumeGetInfo, /* 0.4.0 */
.volGetXMLDesc = storageVolumeGetXMLDesc, /* 0.4.0 */
.volGetPath = storageVolumeGetPath, /* 0.4.0 */
.volResize = storageVolumeResize, /* 0.9.10 */
.poolIsActive = storagePoolIsActive, /* 0.7.3 */
.poolIsPersistent = storagePoolIsPersistent, /* 0.7.3 */