Create an API to search through the storage pool objects looking for
a specific truism from a callback API in order to return the specific
storage pool object that is desired.
Create an API to walk the pools->objs[] list in order to perform a
callback function for each element of the objs array that doesn't care
about whether the action succeeds or fails as the desire is to run the
code over every element in the array rather than fail as soon as or if
one fails.
For now it'll just call the virStoragePoolObjUnlock, but a future
adjustment will do something different. Since the new API will check
for a NULL object before the Unlock call, callers no longer need to
check for NULL before calling.
The virStoragePoolObjUnlock is now private/static to virstorageobj.c
with a short term forward reference.
Resolve a storage driver crash as a result of a long running
storageVolCreateXML when the virStorageVolPoolRefreshThread is
run as a result of when a storageVolUpload completed and ran the
virStoragePoolObjClearVols without checking if the creation
code was currently processing a buildVol after incrementing
the driver->asyncjob count.
The refreshThread will now check the pool asyncjob count before
attempting to pursue the pool refresh. Adjust the documentation
to describe the condition.
Crash from valgrind is as follows (with a bit of editing):
==21309== Invalid read of size 8
==21309== at 0x153E47AF: storageBackendUpdateVolTargetInfo
==21309== by 0x153E4C30: virStorageBackendUpdateVolInfo
==21309== by 0x153E52DE: virStorageBackendVolRefreshLocal
==21309== by 0x153DE29E: storageVolCreateXML
==21309== by 0x562035B: virStorageVolCreateXML
==21309== by 0x147366: remoteDispatchStorageVolCreateXML
...
==21309== Address 0x2590a720 is 64 bytes inside a block of size 336 free'd
==21309== at 0x4C2F2BB: free
==21309== by 0x54CB9FA: virFree
==21309== by 0x55BC800: virStorageVolDefFree
==21309== by 0x55BF1D8: virStoragePoolObjClearVols
==21309== by 0x153D967E: virStorageVolPoolRefreshThread
...
==21309== Block was alloc'd at
==21309== at 0x4C300A5: calloc
==21309== by 0x54CB483: virAlloc
==21309== by 0x55BDC1F: virStorageVolDefParseXML
==21309== by 0x55BDC1F: virStorageVolDefParseNode
==21309== by 0x55BE5A4: virStorageVolDefParse
==21309== by 0x153DDFF1: storageVolCreateXML
==21309== by 0x562035B: virStorageVolCreateXML
==21309== by 0x147366: remoteDispatchStorageVolCreateXML
...
Right-aligning backslashes when defining macros or using complex
commands in Makefiles looks cute, but as soon as any changes is
required to the code you end up with either distractingly broken
alignment or unnecessarily big diffs where most of the changes
are just pushing all backslashes a few characters to one side.
Generated using
$ git grep -El '[[:blank:]][[:blank:]]\\$' | \
grep -E '*\.([chx]|am|mk)$$' | \
while read f; do \
sed -Ei 's/[[:blank:]]*[[:blank:]]\\$/ \\/g' "$f"; \
done
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
When the user provides backing chain, we don't need the full support for
traversing the backing chain. This patch adds a feature check for the
virStorageSourceAccess API.
The 'file access' module of the storage driver has few feature checks to
determine whether libvirt supports given storage driver method. The code
to retrieve the driver struct needed for the check is the same so it can
be extracted.
https://bugzilla.redhat.com/show_bug.cgi?id=1427049
Use virStorageBackendCreateVolUsingQemuImg to apply the LUKS information
to the logical volume just created. As part of the processing of the
lvcreate command add 2MB to the capacity to account for the LUKS header
when it's determined that the volume desires to use encryption.
Refactor to extract out the LVCREATE command. This also removes the
need for the local @created since the error path can now only be reached
after the creation of the logical volume.
Signed-off-by: John Ferlan <jferlan@redhat.com>
https://bugzilla.redhat.com/show_bug.cgi?id=1490279
Turns out the virStorageBackendVolResizeLocal did not differentiate
whether the target volume was a LUKS volume or not and just blindly
did the ftruncate() on the target volume.
Follow the volume creation logic (in general) and create a qemu-img
resize command to resize the target volume for LUKS ensuring that
the --object secret is provided as well as the '--image-opts' used
by the qemu-img resize logic to describe the path and secret ensuring
that it's using the luks driver on the volume of course.
Since all that was really needed was a couple of fields and building
the object can be more generic, let's alter the args a bit. This will
be useful shortly for adding the secret object for a volume resize
operation on a luks volume that will need a secret object.
Rather than passing just the path, pass the virStorageVolDefPtr as we're
going to need it shortly.
Also fix the order of code and stack variables in the calling function
virStorageBackendVolResizeLocal.
Express a properly terminated backing chain by putting a
virStorageSource of type VIR_STORAGE_TYPE_NONE in the chain. The newly
used helpers simplify this greatly.
The change fixes a bug as formatting an incomplete backing chain and
parsing it back would end up in expressing a terminated chain since
src->backingStoreRaw was not populated. By relying on the terminator
object this can be now processed appropriately.
Add helpers that will simplify checking if a backing file is valid or
whether it has backing store. The helper virStorageSourceIsBacking
returns true if the given virStorageSource is a valid backing store
member. virStorageSourceHasBacking returns true if the virStorageSource
has a backing store child.
Adding these functions creates a central points for further refactors.
Storage driver uses virStorageSource only partially to store it's
configuration but fully when parsing backing files of storage volumes.
This patch sets the 'type' field to a value other than
VIR_STORAGE_TYPE_NONE so that further patches can add a terminator
element to backing chains without breaking iteration.
The backing store indexes were not bound to the storage sources in any
way. To allow us to bind a given alias to a given storage source we need
to save the index in virStorageSource. The backing store ids are now
generated when detecting the backing chain.
Since we don't re-detect the backing chain after snapshots, the
numbering needs to be fixed there.
In preparation for privatizing the object, use the accessor to fetch
the obj->def instead of the direct reference.
Signed-off-by: John Ferlan <jferlan@redhat.com>
We have been trying to implement the ALLOCATE flag to mean
"the volume should be fully allocated after the resize".
Since commit b0579ed9 we do not allocate from the existing
capacity, but from the existing allocation value.
However this value is a total of all the allocated bytes,
not an offset.
For a sparsely allocated file:
$ perl -e 'print "x"x8192;' > vol1
$ fallocate -p -o 0 -l 4096 vol1
$ virsh vol-info vol1 default
Capacity: 8.00 KiB
Allocation: 4.00 KiB
Treating allocation as an offset would result in an incompletely
allocated file:
$ virsh vol-resize vol1 --pool default 16384 --allocate
Capacity: 16.00 KiB
Allocation: 12.00 KiB
Call fallocate from zero on the whole requested capacity to fully
allocate the file. After that, the volume is fully allocated
after the resize:
$ virsh vol-resize vol1 --pool default 16384 --allocate
$ virsh vol-info vol1 default
Capacity: 16.00 KiB
Allocation: 16.00 KiB
This commit adds new events for two methods and operations: *PoolBuild() and
*PoolDelete(). Using the event-test and the commands set below we have the
following outputs:
$ sudo ./event-test
Registering event callbacks
myStoragePoolEventCallback EVENT: Storage pool test Defined 0
myStoragePoolEventCallback EVENT: Storage pool test Created 0
myStoragePoolEventCallback EVENT: Storage pool test Started 0
myStoragePoolEventCallback EVENT: Storage pool test Stopped 0
myStoragePoolEventCallback EVENT: Storage pool test Deleted 0
myStoragePoolEventCallback EVENT: Storage pool test Undefined 0
Another terminal:
$ sudo virsh pool-define test.xml
Pool test defined from test.xml
$ sudo virsh pool-build test
Pool test built
$ sudo virsh pool-start test
Pool test started
$ sudo virsh pool-destroy test
Pool test destroyed
$ sudo virsh pool-delete test
Pool test deleted
$ sudo virsh pool-undefine test
Pool test has been undefined
This commits can be a solution for RHBZ #1475227.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1475227
Signed-off-by: Julio Faracco <jcfaracco@gmail.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Introduce virStoragePoolObjForEachVolume to scan each volume
calling the passed callback function until all volumes have been
processed in the storage pool volume list, unless the callback
function returns an error.
Introduce virStoragePoolObjSearchVolume to search each volume
calling the passed callback function until it returns true
indicating that the desired volume was found.
Signed-off-by: John Ferlan <jferlan@redhat.com>
Create/use virStoragePoolObjAddVol in order to add volumes onto list.
Create/use virStoragePoolObjRemoveVol in order to remove volumes from list.
Create/use virStoragePoolObjGetVolumesCount to get count of volumes on list.
For the storage driver, the logic alters when the volumes.obj list grows
to after we've fetched the volobj. This is an optimization of sorts, but
also doesn't "needlessly" grow the volumes.objs list and then just decr
the count if the virGetStorageVol fails.
Signed-off-by: John Ferlan <jferlan@redhat.com>
https://bugzilla.redhat.com/show_bug.cgi?id=1464313
If a Disk pool was defined/created using XML that either didn't
specify a specific format or specified format type='unknown', then
restarting a pool after an initial disk backend build with overwrite
would fail after a libvirtd restart for a non-autostarted pool.
This is because the persistent pool data is not updated during pool
build w/ overwrite processing to have the VIR_STORAGE_POOL_DISK_DOS
default format.
So in addition to the alteration done during disk build processing,
alter the default expectation for disk startup to be DOS if nothing
has been defined yet. That will either succeed if the pool had been
successfully built previously using the default DOS format or fail
with a message indicating the format is something else that does not
match the expect format 'dos'.
https://bugzilla.redhat.com/show_bug.cgi?id=1437797
Rather than using refreshVol which essentially only updates the
allocation, capacity, and permissions for the volume, but not
the format which does get updated in a pool refresh - let's use
the same helper that pool refresh uses in order to update the
volume target.
