Storage: Calculate progress based on the real file size instead of virtual disk size

Encryption: Add a way to retrieve the encryption settings without providing the password. Returns only the used cipher and the password ID

Log cosmetics.

VD: Don't set an error when creating the filter failed, appropriate error should be set by the caller

Storage/VD: Add API to prepare a chain of images for use with filters

Add support to supply passwords for disk encryption while the VM is running

Storage/VD: make use of the image type (hdd/dvd/floppy) for sanity checking when creating disk images

Storage/VD: Allow different filter chains for reads and writes (required by disk image encryption to encrypt images afterwards)

don't check for VALID_PTR after RTMem*Alloc(), that's overkill

scm automatic cleanups.

Storage/VD: Fix broken resume after the VM was suspended due to a full disk when the IDE controller is used

Storage/VD + Main/ExtPackManager+VirtualBox+SystemProperties: handle unloading of VD plugin from VBoxSVC when extpack is uninstalled, fixes extpack uninstall problems related to VDPluginCrypt.dll on Windows

Unused variable

Storage/VD,VHD: Fix crash with certain VHD images with only partial filled sector bitmaps

VD: Fix read corruption under rare circumstances if a read happens while a write allocating data accesses the same range

VD: Add API to query information about a filter

Storage/VD: Fix crash

Main,DrvVD,VD: Implement support for VD plugins from extension packs

Storage/VD: Add methods to load a plugin from a given path/file. Preparation for support of VD plugins in extension packs

Storage: Fix concurrency issue with filters configured which can result in corrupt data being transfered, the filters must be applied under the lock to avoid multiple threads accessing the same filter at the same time

Storage: Fix possible data corruption or read errors if a request accesses the same region while another write is active and allocating a new data block in the image

Storage/FilterCrypt: Remove hardcoded data unit size of 512 bytes and introduce interface to query the size from the generic layer

VD: Fixes for filter support

Storage: Add support for filter plugins

Storage/VD: Cleanup VD plugin handling. One shared object can now support an arbitrary number of image backends instead of just one like before

Storage/VD: Zero free blocks in the parent read callback used for compaction

Storage,VHD: Fix I/O if VD_OPEN_FLAGS_HONOR_SAME is used

Storage/VD: Fix bug which causes that data is read twice. Because there is no room left in the buffer an error is returned

Storage: Small fix to previous change

Storage/VD: Remove disk full hack and use the proper way to return the status code which is the rcReq field of te I/O context.

Storage: Modify hack to fix hanging VMs when the dis is full during synchronous writes

Storage: Whitespace cleanups by scm.

disabled some of the new assertions as dmgRead or/and vdCopyHelper doesn't set cbTransferLeft for some reason.

VD.cpp: Windows warnings.

Storage/VD: Add support for different sector sizes (only opening and reading and writing images, not creating them with a sector size other than 512 bytes)

pr6938. Error VERR_DISK_FULL isn't replaced by VINF_VD_ASYNC_IO_FINISHED anymore when is returned from vdIoCtxProcessLocked().

VD: Don't try to repair corrupted images when they are opened read only

VD: Correct status code passing for synchronous requests

Storage: Fix assertion when using the iSCSI backend

VD.cpp: Don't assert when reading beyond the end of a floppy image. We frequently (boot sector tests for instance) attach images that are smaller than the disk size guessed by the guest. Just return blocks filled with good old F6h for the missing parts of floppies.

Storage: Don't set the modified flag when copying images with VDCopy, fixes non sequential access assertions when exporting to OVA

Storage: Update parent image override when creating a child I/O context, fixes merging images

Storage: Propagate errors when closing a file but free everything nevertheless (see @bugref{6791})

Storage: Fix race condition causing I/O hangs

Storage: Fix lost writes when the iSCSI is used with snapshots

Storage: Fix hang for sync I/O under some circumstances

Storage: Another shot at the I/O unification after fixing a bug

Revert r83909 again, seems to cause trouble on the testboxes

Storage: Another try to unify sync and async I/O code

Backout r83702 because it causes regressions

Storage/VD: Remove the leftovers of the sync I/O path, everything is covered by the async I/O path now

Storage: Unused variable

Storage: Fix endless loop in flush handling

Storage: Merge sync/async path for flush requests

Storage: Merge sync/async interface for the cache

Storage/VD: stop sabotaging the resize of diff images

Storage/VD: Further I/O path unification, drop synchronous vdDiscardHelper and use async version for VDDiscardRanges

Storage/VD: Drop critical section and replace it with queues to avoid waiting times if the critical section is held by another thread

Storage/Backends: async/sync I/O unification, remove separate entries for sync and async I/O callbacks, remove unused code

Storage: Next step in the sync/async I/O unification, change all calls to pfnRead/pfnWrite/pfnFlush to pfnAsyncRead/pfnAsyncWrite/pfnFlush

Storage: Preparations for the sync/async I/O unification

Storage: Fix regression introduced when adding VD_OPEN_FLAGS_SKIP_CONSISTENCY_CHECKS resulting in non working online merging of snapshots

VD: Update size field after a successful resize operation

Storage: Introduce new flag to skip unnecessary consistency checks in the VMDK backend while opening an image in readonly mode to speed up opening snapshots

Storage: Repair images when opening if they are corrupted and can be repaired

Storage/VD: workaround for bug related to UUID handling of images which have no UUID, e.g. iSCSI

VD: Fix broken async iSCSI support

Storage: Make it possible to set VD_OPEN_FLAGS_INFORM_ABOUT_ZERO_BLOCKS during runtime

Storage: New return status code when a free block is read

Comment typos.

Doxygen, comment typos.

Storage: Start of a VHDX backend for readonly access to import those images into VBox, work in progress

Storage/VD: tweak error handling a bit so that file access errors are not seen as success (which confuses callers)

Storage: Fix compiler warning

Storage: Disable dynamic loading of backends on non x86 architectures

Storage/VD: Fix more places to properly handle the ignore flush flag during opening and creating images

Storage/VD: Fix ignore flush flag when creating images

Storage/VD: errors during closing all images in VDDestroy shouldn't be lost

VD: Disable optimization temporary until the crash is fixed

VD: Initialize member

VD: Optimization, reduce locking contention between EMT and the I/O thread by only trying to enter the lock and deferring the request from EMT if the lock is held already. Should allow EMT to resume guest execution earlier

VD: Add option to ignore flush requests

IPRT/*: add _NO_SYMLINKS flags to certain functions

VD: API to repair corrupted images

VD: Fix reading wrong data under certain circumstances when using differential images and VMDK, VHD, QED or QCOW images + a fix for a possible lock order violation when a flush request completes

Storage: Add async discard API

VD/Discard: Bugfixes

VD: Destroy the discard state if the flags are changed

VD+VDI: Implement optimization for discard to avoid reading the complete data all the time and bug fixes

VD: Initial support to discard unused blocks in an image + support for VDI images

Storage: Add an almost working QCOW backend, can handle version 1 images. Support for QCOW2 is incomplete

VD: Interface cleanup. Merge the two involved structures (generic interface descriptor and callback table) into one, remove the duplicated interface wrappers in the backends and move the interface definitions into separate headers separating public and private interfaces.

Storage: Add QED backend

VD: Fix copy optimization

VD: Fix a possible deadlock if the block cache is enabled

VD: New VDCopyEx() API which can speedup cloning of diff images when cloning a VM

VD: Remove left over defines for logging and assertions

VD: Fix deadlock

VD: Fix rare hangs during I/O with flat VMDK images

VD,VMDK: Enable debug logging for release builds

VD: Fix lock owner when unlocking the disk

Enable a few assertions temporary

Storage: Small cleanup. Drops VDImageIsAsyncIOSupported, it is completely unused and the best behavior is to fail in VDOpen like we do for all the other flags

VD: Fix possible race condition which can lead to hanging I/O requests

VD: Fix leak if queuing a I/O request failed

Storage: Fix forgotten unlock of the disk

Storage: Fix read from wrong snapshots. Happens only with formats which need to read metadata from the disk and for disks with more than 1 snapshot

VD: Update the modification UUID during async I/O

Storage/VD: Use the correct image for writing, fixes VERR_VD_READONLY errors when using async I/O + snapshots

Storage: Fix possible crashes with VMDK/VHD imageswith snapshots and async I/O

Use RTERRINFO in SUPLib for hardening APIs and such.

*: added fFlags parameter to ''SUPR3HardenedLdrLoadAppPriv()'', ''SUPR3HardenedLdrLoad()'' and ''RTLdrLoadEx()''. VBoxSVC: slurp in VBoxVMM because it is required by the extension packs

Added RTLdrLoadEx for exposing dlerror info.

Storage/VD: adjust LCHS geometry in a smart way when cloning the image

iprt/list.h: RTListNodeGetFirst/Last -> RTListGetFirst/Last; added RTListGetNext, RTListGetPrev, RTListNodeInsertAfter and RTListNodeInsertBefore.

VD: Use S/G buffers instead of S/G arrays for VDAsyncWrite and VDAsyncRead (Preparation for moving the I/O cache in front of VD, see #5295)

VCI: Updates

src/*: more spelling fixes (logging), thanks Timeless!

VD: Move the generic virtual disk framework + backends to src/VBox/Storage and rename the files to get rid of the HDD part because it supports floppy and DVD images too