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* Convert all block drivers to new bdrv_createKevin Wolf2009-05-221-11/+33
| | | | | | | | | | | | Now we can make use of the newly introduced option structures. Instead of having bdrv_create carry more and more parameters (which are format specific in most cases), just pass a option structure as defined by the driver itself. bdrv_create2() contains an emulation of the old interface to simplify the transition. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
* Fix segv when passing an unknown protocolAnthony Liguori2009-05-221-1/+1
| | | | Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
* Convert block infrastructure to use new module init functionalityAnthony Liguori2009-05-141-24/+11Star
| | | | Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
* Improve block range checksKevin Wolf2009-05-081-1/+6
| | | | | | | | | This patch makes the range checks for block requests more strict: It fixes a potential integer overflow and checks for negative offsets. Also, it adds the check for compressed writes. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
* implement qemu_blockalign (Stefano Stabellini)aliguori2009-04-221-1/+8
| | | | | | | | | | | | | | | | | | | | | | this patch adds a buffer_alignment field to BlockDriverState and implements a qemu_blockalign function that uses that field to allocate a memory aligned buffer to be used by the block driver. buffer_alignment is initialized to 512 but each block driver can set a different value (at the moment none of them do). This patch modifies ide.c, block-qcow.c, block-qcow2.c and block.c to use qemu_blockalign instead of qemu_memalign. There is only one place left that still uses qemu_memalign to allocate buffers used by block drivers that is posix-aio-compat:handle_aiocb_rw because it is not possible to get the BlockDriverState from that function. However I think it is not important because posix-aio-compat already deals with driver specific code so it is supposed to know its own needs. Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@7229 c046a42c-6fe2-441c-8c8c-71466251a162
* Introduce bdrv_check (Kevin Wolf)aliguori2009-04-221-0/+14
| | | | | | | | | | | | | From: Kevin Wolf <kwolf@redhat.com> Introduce a new bdrv_check function pointer for block drivers. Modify qcow2 to return an error status in check_refcounts(), so it can implement bdrv_check. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@7214 c046a42c-6fe2-441c-8c8c-71466251a162
* Fix OpenSolaris gcc4 warnings: iovec type mismatches, missing 'static'blueswir12009-04-131-1/+1
| | | | git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@7103 c046a42c-6fe2-441c-8c8c-71466251a162
* native preadv/pwritev support (Christoph Hellwig)aliguori2009-04-071-2/+1Star
| | | | | | | | | | | | | | | | This ties up the preadv/pwritev syscalls to qemu if they are declared in unistd.h. This is the case currently on at least NetBSD and OpenBSD and will hopefully soon be the case on Linux. Thanks to Blue Swirl and Gerd Hoffmann for the configure autodetection of preadv/pwritev. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@7021 c046a42c-6fe2-441c-8c8c-71466251a162
* push down vector linearization to posix-aio-compat.c (Christoph Hellwig)aliguori2009-04-071-126/+70Star
| | | | | | | | | | | | | | | | | Make all AIO requests vectored and defer linearization until the actual I/O thread. This prepares for using native preadv/pwritev. Also enables asynchronous direct I/O by handling that case in the I/O thread. Qcow and qcow2 propably want to be adopted to directly deal with multi-segment requests, but that can be implemented later. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@7020 c046a42c-6fe2-441c-8c8c-71466251a162
* remove bdrv_aio_read/bdrv_aio_write (Christoph Hellwig)aliguori2009-04-071-2/+8
| | | | | | | | | | | | Always use the vectored APIs to reduce code churn once we switch the BlockDriver API to be vectored. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@7019 c046a42c-6fe2-441c-8c8c-71466251a162
* Fix savevm after BDRV_FILE size enforcementaliguori2009-04-051-0/+20
| | | | | | | | | | | | | We now enforce that you cannot write beyond the end of a non-growable file. qcow2 files are not growable but we rely on them being growable to do savevm/loadvm. Temporarily allow them to be growable by introducing a new API specifically for savevm read/write operations. Reported-by: malc Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6994 c046a42c-6fe2-441c-8c8c-71466251a162
* check for bs->drv in bdrv_flush (Christoph Hellwig)aliguori2009-03-291-0/+2
| | | | | | | | | | | | | | | All the bdrv_ helpers should check for bs->drv being zero as that means there is no backend image open. bdrv_flush fails to perform that check and can thus cause NULL pointer dereferences. Found using qemu-io. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6943 c046a42c-6fe2-441c-8c8c-71466251a162
* remove dead code in bdrv_check_request (Christoph Hellwig)aliguori2009-03-291-9/+1Star
| | | | | | | | | | | | | | | Remove code dealing with negative sector numbers for byte access in bdrv_check_request as sector numbers can't ever be negative. Previously we supported negative sector counts for byte access, but never sector numbers. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6942 c046a42c-6fe2-441c-8c8c-71466251a162
* block: support known backing format for image create and open (Uri Lublin)aliguori2009-03-281-4/+24
| | | | | | | | | | | | | | Added a backing_format field to BlockDriverState. Added bdrv_create2 and drv->bdrv_create2 to create an image with a known backing file format. Upon bdrv_open2 if backing format is known use it, instead of probing the (backing) image. Signed-off-by: Uri Lublin <uril@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6908 c046a42c-6fe2-441c-8c8c-71466251a162
* new scsi-generic abstraction, use SG_IO (Christoph Hellwig)aliguori2009-03-281-18/+7Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | Okay, I started looking into how to handle scsi-generic I/O in the new world order. I think the best is to use the SG_IO ioctl instead of the read/write interface as that allows us to support scsi passthrough on disk/cdrom devices, too. See Hannes patch on the kvm list from August for an example. Now that we always do ioctls we don't need another abstraction than bdrv_ioctl for the synchronous requests for now, and for asynchronous requests I've added a aio_ioctl abstraction keeping it simple. Long-term we might want to move the ops to a higher-level abstraction and let the low-level code fill out the request header, but I'm lazy enough to leave that to the people trying to support scsi-passthrough on a non-Linux OS. Tested lightly by issuing various sg_ commands from sg3-utils in a guest to a host CDROM device. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6895 c046a42c-6fe2-441c-8c8c-71466251a162
* Fix vectored aio bounce handling immediate errors (Avi Kivity)aliguori2009-03-281-0/+5
| | | | | | | | | | | | | | | If a bounced vectored aio fails immediately (the inner aio submission returning NULL) then the bounce handler erronously returns an aio request which will never be completed (and which crashes when cancelled). Fix by detecting that the inner request has failed and propagating the error. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6892 c046a42c-6fe2-441c-8c8c-71466251a162
* Use vectored aiocb storage to store vector translation state (Avi Kivity)aliguori2009-03-201-15/+14Star
| | | | | | | | | | | | Now that we have a dedicated acb pool for vector translation acbs, we can store the vector translation state in the acbs instead of in an external structure. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6873 c046a42c-6fe2-441c-8c8c-71466251a162
* Convert vectored aio emulation to use a dedicated pool (Avi Kivity)aliguori2009-03-201-6/+14
| | | | | | | | | | This allows us to remove a hack in the vectored aio cancellation code. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6871 c046a42c-6fe2-441c-8c8c-71466251a162
* Refactor aio callback allocation to use an aiocb pool (Avi Kivity)aliguori2009-03-201-15/+27
| | | | | | | | | | | | | | | Move the AIOCB allocation code to use a dedicate structure, AIOPool. AIOCB specific information, such as the AIOCB size and cancellation routine, is moved into the pool. At present, there is exactly one pool per block format driver, maintaining the status quo. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6870 c046a42c-6fe2-441c-8c8c-71466251a162
* Drop internal bdrv_pread()/bdrv_pwrite() APIs (Avi Kivity)aliguori2009-03-121-73/+6Star
| | | | | | | | | | | | Now that scsi generic no longer uses bdrv_pread() and bdrv_pwrite(), we can drop the corresponding internal APIs, which overlap bdrv_read()/bdrv_write() and, being byte oriented, are unnatural for a block device. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6824 c046a42c-6fe2-441c-8c8c-71466251a162
* Add internal scsi generic block API (Avi Kivity)aliguori2009-03-121-4/+4
| | | | | | | | | | | | Add an internal API for the generic block layer to send scsi generic commands to block format driver. This means block format drivers no longer need to consider overloaded nb_sectors parameters. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6823 c046a42c-6fe2-441c-8c8c-71466251a162
* Add specialized block driver scsi generic API (Avi Kivity)aliguori2009-03-121-0/+22
| | | | | | | | | | | | | | | | | | | | When a scsi device is backed by a scsi generic device instead of an ordinary host block device, the block API is abused in a couple of annoying ways: - nb_sectors is negative, and specifies a byte count instead of a sector count - offset is ignored, since scsi-generic is essentially a packet protocol This overloading makes hacking the block layer difficult. Remove it by introducing a new explicit API for scsi-generic devices. The new API is still backed by the old implementation, but at least the users are insulated. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6822 c046a42c-6fe2-441c-8c8c-71466251a162
* Revert r6406aliguori2009-03-111-6/+1Star
| | | | | | | | | | | This series is broken by design as it requires expensive IO operations at open time causing very long delays when starting a virtual machine for the first time. Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6814 c046a42c-6fe2-441c-8c8c-71466251a162
* Revert r6407aliguori2009-03-111-3/+2Star
| | | | | | | | | | | This series is broken by design as it requires expensive IO operations at open time causing very long delays when starting a virtual machine for the first time. Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6813 c046a42c-6fe2-441c-8c8c-71466251a162
* Fix windows build and clean up use of <windows.h>aliguori2009-03-081-0/+4
| | | | | | | | | | | | | We want to globally define WIN_LEAN_AND_MEAN and WINVER to particular values so let's do it in OS_CFLAGS. Then, we can pepper in windows.h includes where using #includes that require it. Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6783 c046a42c-6fe2-441c-8c8c-71466251a162
* Rename _BSD to HOST_BSD so that it's more obvious that it's defined by configureblueswir12009-03-081-2/+2
| | | | git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6775 c046a42c-6fe2-441c-8c8c-71466251a162
* Support for DragonFly BSD (Hasso Tepper)blueswir12009-03-071-0/+2
| | | | git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6746 c046a42c-6fe2-441c-8c8c-71466251a162
* monitor: Rework API (Jan Kiszka)aliguori2009-03-061-33/+33
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Refactor the monitor API and prepare it for decoupled terminals: term_print functions are renamed to monitor_* and all monitor services gain a new parameter (mon) that will once refer to the monitor instance the output is supposed to appear on. However, the argument remains unused for now. All monitor command callbacks are also extended by a mon parameter so that command handlers are able to pass an appropriate reference to monitor output services. For the case that monitor outputs so far happen without clearly identifiable context, the global variable cur_mon is introduced that shall once provide a pointer either to the current active monitor (while processing commands) or to the default one. On the mid or long term, those use case will be obsoleted so that this variable can be removed again. Due to the broad usage of the monitor interface, this patch mostly deals with converting users of the monitor API. A few of them are already extended to pass 'mon' from the command handler further down to internal functions that invoke monitor_printf. At this chance, monitor-related prototypes are moved from console.h to a new monitor.h. The same is done for the readline API. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6711 c046a42c-6fe2-441c-8c8c-71466251a162
* monitor: Rework modal password input (Jan Kiszka)aliguori2009-03-061-6/+15
| | | | | | | | | | | | | | | | | | Currently, waiting for the user to type in some password blocks the whole VM because monitor_readline starts its own I/O loop. And this loop also screws up reading passwords from virtual console. Patch below fixes the shortcomings by using normal I/O processing also for waiting on a password. To keep to modal property for the monitor terminal, the command handler is temporarily replaced by a password handler and a callback infrastructure is established to process the result before switching back to command mode. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6710 c046a42c-6fe2-441c-8c8c-71466251a162
* monitor: Rework early disk password inquiry (Jan Kiszka)aliguori2009-03-061-1/+13
| | | | | | | | | | | | | | | | | | | | | | Reading the passwords for encrypted hard disks during early startup is broken (I guess for quiet a while now): - No monitor terminal is ready for input at this point - Forcing all mux'ed terminals into monitor mode can confuse other users of that channels To overcome these issues and to lay the ground for a clean decoupling of monitor terminals, this patch changes the initial password inquiry as follows: - Prevent autostart if there is some encrypted disk - Once the user tries to resume the VM, prompt for all missing passwords - Only resume if all passwords were accepted Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6707 c046a42c-6fe2-441c-8c8c-71466251a162
* monitor: Report encrypted disks in snapshot mode (Jan Kiszka)aliguori2009-03-061-2/+1Star
| | | | | | | | | | | | If the backing file is encrypted, 'info block' currently does not report the disk as encrypted. Fix this by using the standard API to check disk encryption mode. Moreover, switch to a canonical output format. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6706 c046a42c-6fe2-441c-8c8c-71466251a162
* block: Introduce bdrv_get_encrypted_filename (Jan Kiszka)aliguori2009-03-061-0/+10
| | | | | | | | | | | Introduce bdrv_get_encrypted_filename service to allow more informative password prompting. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6704 c046a42c-6fe2-441c-8c8c-71466251a162
* block: Improve bdrv_iterate (Jan Kiszka)aliguori2009-03-061-2/+2
| | | | | | | | | | | Make bdrv_iterate more useful by passing the BlockDriverState to the iterator instead of the device name. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6703 c046a42c-6fe2-441c-8c8c-71466251a162
* block: Polish error handling of brdv_open2 (Jan Kiszka)aliguori2009-03-061-25/+21Star
| | | | | | | | | | | Make sure that we always delete temporary disk images on error, remove obsolete malloc error checks and return proper error codes. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6702 c046a42c-6fe2-441c-8c8c-71466251a162
* Fix CVE-2008-0928 - insufficient block device address range checking ↵aliguori2009-03-031-0/+55
| | | | | | | | | | | | | | | | | | | | | | | | | | (Anthony Liguori) Introduce a growable flag that's set by bdrv_file_open(). Block devices should never be growable, only files that are being used by block devices. I went through Fabrice's early comments about the patch that was first applied. While I disagree with that patch, I also disagree with Fabrice's suggestion. There's no good reason to do the checks in the block drivers themselves. It just increases the possibility that this bug could show up again. Since we're calling bdrv_getlength() to determine the length, we're giving the block drivers a chance to chime in and let us know what range is valid. Basically, this patch makes the BlockDriver API guarantee that all requests are within 0..bdrv_getlength() which to me seems like a Good Thing. What do others think? Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6677 c046a42c-6fe2-441c-8c8c-71466251a162
* fix SIGSEGV when USE_KQEMU is definedaurel322009-03-031-1/+1
| | | | | | | Signed-off-by: Alex Ivanov <void@aleksoft.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6674 c046a42c-6fe2-441c-8c8c-71466251a162
* block: remove error handling from qemu_malloc() callers (Avi Kivity)aliguori2009-02-051-6/+0Star
| | | | | | | | Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6527 c046a42c-6fe2-441c-8c8c-71466251a162
* qemu iovec: keep track of total size, allow partial copies (Gerd Hoffman)aliguori2009-01-261-1/+1
| | | | | | | | Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6448 c046a42c-6fe2-441c-8c8c-71466251a162
* qcow2 format: keep 'num_free_bytes', and show it upon 'info blockstats' (Uri ↵aliguori2009-01-221-2/+3
| | | | | | | | | | | | | | | | | | | | | | Lublin) 'num_free_bytes' is the number of non-allocated bytes below highest-allocation. It's useful, together with the highest-allocation, to figure out how fragmented the image is, and how likely it will run out-of-space soon. For example when the highest allocation is high (almost end-of-disk), but many bytes (clusters) are free, and can be re-allocated when neeeded, than we know it's probably not going to reach end-of-disk-space soon. Added bookkeeping to block-qcow2.c Export it using BlockDeviceInfo Show it upon 'info blockstats' if BlockDeviceInfo exists Signed-off-by: Uri Lublin <uril@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6407 c046a42c-6fe2-441c-8c8c-71466251a162
* info blockstats: show highest_allocated if exists (Uri Lublin)aliguori2009-01-221-1/+6
| | | | | | | | Signed-off-by: Uri Lublin <uril@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6406 c046a42c-6fe2-441c-8c8c-71466251a162
* Vectored block device API (Avi Kivity)aliguori2009-01-221-0/+68
| | | | | | | | | | | | | | | | | | Most devices that are capable of DMA are also capable of scatter-gather. With the memory mapping API, this means that the device code needs to be able to access discontiguous host memory regions. For block devices, this translates to vectored I/O. This patch implements an aynchronous vectored interface for the qemu block devices. At the moment all I/O is bounced and submitted through the non-vectored API; in the future we will convert block devices to natively support vectored I/O wherever possible. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6397 c046a42c-6fe2-441c-8c8c-71466251a162
* bdrv_write should not stop on partial write (Gleb Natapov)aliguori2009-01-151-13/+14
| | | | | | | | | | | Should return real error instead. Signed-off-by: Gleb Natapov <gleb@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6323 c046a42c-6fe2-441c-8c8c-71466251a162
* Attached patch contains warning fixes.blueswir12008-12-051-2/+2
| | | | | | | Signed-off-by: Christoph Egger <Christoph.Egger@amd.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5888 c046a42c-6fe2-441c-8c8c-71466251a162
* sys-queue.h defines _SYS_QUEUE_H_ which is also defined byblueswir12008-12-051-1/+6
| | | | | | | | | | | the <sys/queue.h> system header. <sys/disk.h> uses SLIST_ENTRY on NetBSD, which doesn't exist in sys-queue.h. Therefore, include <sys/queue.h> before including sys-queue.h. Signed-off-by: Christoph Egger <Christoph.Egger@amd.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5885 c046a42c-6fe2-441c-8c8c-71466251a162
* Abstract out geometry detection code from IDE for reusealiguori2008-11-251-0/+116
| | | | | | | | | | | Virtio will want to use the geometry detection code. It doesn't belong in ide.c anyway. Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5797 c046a42c-6fe2-441c-8c8c-71466251a162
* Use an option rom instead of boot sector for -kernelaliguori2008-11-081-32/+0Star
| | | | | | | | | | | | | | | Generate an option rom instead of using a hijacked boot sector for kernel booting. This just requires adding a small option ROM header and a few more instructions to the boot sector to take over the int19 vector and run our boot code. A disk is no longer needed when using -kernel on x86. Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5650 c046a42c-6fe2-441c-8c8c-71466251a162
* Expand cache= option and use write-through caching by defaultaliguori2008-10-141-3/+3
| | | | | | | | | | | | | | | | | | This patch changes the cache= option to accept none, writeback, or writethough to control the host page cache behavior. By default, writethrough caching is now used which internally is implemented by using O_DSYNC to open the disk images. When using -snapshot, writeback is used by default since data integrity it not at all an issue. cache=none has the same behavior as cache=off previously. The later syntax is still supported by now deprecated. I also cleaned up the O_DIRECT implementation to avoid many of the #ifdefs. Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5485 c046a42c-6fe2-441c-8c8c-71466251a162
* open() can also return EPERM for O_RDWR on a readonly deviceaurel322008-10-131-1/+1
| | | | | | | Signed-off-by: Juergen Lock <nox@jelal.kn-bremen.de> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5482 c046a42c-6fe2-441c-8c8c-71466251a162
* Add bdrv_flush_all()aliguori2008-10-061-0/+10
| | | | | | | | | | | | | | This patch adds a bdrv_flush_all() function. It's necessary to ensure that all IO operations have been flushed to disk before completely a live migration. N.B. we don't actually use this now. We really should flush the block drivers using an live savevm callback to avoid unnecessary guest down time. Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5432 c046a42c-6fe2-441c-8c8c-71466251a162
* Refactor AIO to allow multiple AIO implementationsaliguori2008-09-221-2/+0Star
| | | | | | | | | | | | | | | | | | | | | | This patch refactors the AIO layer to allow multiple AIO implementations. It's only possible because of the recent signalfd() patch. Right now, the AIO infrastructure is pretty specific to the block raw backend. For other block devices to implement AIO, the qemu_aio_wait function must support registration. This patch introduces a new function, qemu_aio_set_fd_handler, which can be used to register a file descriptor to be called back. qemu_aio_wait() now polls a set of file descriptors registered with this function until one becomes readable or writable. This patch should allow the implementation of alternative AIO backends (via a thread pool or linux-aio) and AIO backends in non-traditional block devices (like NBD). Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5297 c046a42c-6fe2-441c-8c8c-71466251a162
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