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* 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
* Fix warnings that would be caused by ld flag --warn-commonblueswir12008-09-171-0/+2
| | | | git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5240 c046a42c-6fe2-441c-8c8c-71466251a162
* Use common objects for qemu-img and qemu-nbdaliguori2008-09-151-32/+0Star
| | | | | | | | | | | | | | | | | | | | | | | Right now, we sprinkle #if defined(QEMU_IMG) && defined(QEMU_NBD) all over the code. It's ugly and causes us to have to build multiple object files for linking against qemu and the tools. This patch introduces a new file, qemu-tool.c which contains enough for qemu-img, qemu-nbd, and QEMU to all share the same objects. This also required getting qemu-nbd to be a bit more Windows friendly. I also changed the Windows block-raw to use normal IO instead of overlapping IO since we don't actually do AIO yet on Windows. I changed the various #if 0's to #if WIN32_AIO to make it easier for someone to eventually fix AIO on Windows. After this patch, there are no longer any #ifdef's related to qemu-img and qemu-nbd. Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5226 c046a42c-6fe2-441c-8c8c-71466251a162
* Fix warnings that would be caused by gcc flag -Wwrite-stringsblueswir12008-09-141-1/+1
| | | | git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5206 c046a42c-6fe2-441c-8c8c-71466251a162
* Let snapshot work with protocolsaliguori2008-09-121-1/+13
| | | | | | | | | realpath will horribly mangle a protocol so avoid calling it if the backing file is a protocol. git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5200 c046a42c-6fe2-441c-8c8c-71466251a162
* Only build compatfd when using AIO and make sure to always init AIOaliguori2008-09-111-0/+2
| | | | | | | | | | | | | | OpenBSD doesn't use AIO so don't try to build compatfd when not using AIO. Also make sure to call qemu_aio_init() from bdrv_init. Everything that uses bdrv calls bdrv_init so it makes sense to init aio from there instead of in every single tool. Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5197 c046a42c-6fe2-441c-8c8c-71466251a162
* Use signalfd() to work around signal/select racealiguori2008-09-101-10/+4Star
| | | | | | | | | | | | | | | | | | | This patch introduces signalfd() to work around the signal/select race in checking for AIO completions. For platforms that don't support signalfd(), we emulate it with threads. There was a long discussion about this approach. I don't believe there are any fundamental problems with this approach and I believe eliminating the use of signals is a good thing. I've tested Windows and Linux using Windows and Linux guests. I've also checked for disk IO performance regressions. Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5187 c046a42c-6fe2-441c-8c8c-71466251a162
* Fix some warnings that would be generated by gcc -Wredundant-declsblueswir12008-08-301-1/+0Star
| | | | git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5115 c046a42c-6fe2-441c-8c8c-71466251a162
* Fix windows buildaliguori2008-08-211-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | Right now, the Windows build is broken because of NBD. Using a mingw32 cross compiler is also badly broken. This patch fixes the Windows build by stubbing out NBD support until someone fixes it for Windows. It also santizing the mingw32 cross compiler support by replacing the --enable-mingw32 option with a compiler check to determine if we're on windows or not. Also remove the weird SDL pseudo-detection for mingw32 using a cross compiler. The hardcoded sdl-config name is seemly arbitrary. If you cross compiler SDL correctly and modify your PATH variable appropriately, it will Just Work when cross compiling. The audio driver detection is also broken for cross compiling so you have to specify the audio drivers explicitly for now. Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5046 c046a42c-6fe2-441c-8c8c-71466251a162
* Allow QEMU to connect directly to an NBD server, by Laurent Vivier.ths2008-07-031-0/+1
| | | | git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4838 c046a42c-6fe2-441c-8c8c-71466251a162
* New qemu-img convert -B option, by Marc Bevand.ths2008-06-051-0/+27
| | | | git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4672 c046a42c-6fe2-441c-8c8c-71466251a162
* unlink the bs from bdrv-list upon bdrv_delete(bs)aurel322008-04-081-1/+8
| | | | | | | (Uri Lublin) git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4179 c046a42c-6fe2-441c-8c8c-71466251a162
* Revert fix for CVE-2008-0928. Will be fixed in a different way later.aurel322008-03-121-74/+0Star
| | | | git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4041 c046a42c-6fe2-441c-8c8c-71466251a162
* Fix CVE-2008-0928 - insufficient block device address range checkingaurel322008-03-111-0/+74
| | | | | | | | | Qemu 0.9.1 and earlier does not perform range checks for block device read or write requests, which allows guest host users with root privileges to access arbitrary memory and escape the virtual machine. git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4037 c046a42c-6fe2-441c-8c8c-71466251a162
* Honor TMPDIR environment variableaurel322008-03-101-1/+5
| | | | git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4033 c046a42c-6fe2-441c-8c8c-71466251a162
* Real SCSI device passthrough (v4), by Laurent Vivier.ths2007-12-241-0/+16
| | | | git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3851 c046a42c-6fe2-441c-8c8c-71466251a162
* Add "cache" parameter to "-drive" (Laurent Vivier).balrog2007-12-241-1/+1
| | | | git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3848 c046a42c-6fe2-441c-8c8c-71466251a162
* Fix bdrv_get_geometry to return uint64_t, by Andre Przywara.ths2007-12-171-1/+1
| | | | git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3825 c046a42c-6fe2-441c-8c8c-71466251a162
* Collecting block device statistics, by Richard W.M. Jones.ths2007-12-021-4/+46
| | | | git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3760 c046a42c-6fe2-441c-8c8c-71466251a162
* Add statics and missing #includes for prototypes.pbrook2007-11-181-1/+1
| | | | git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3683 c046a42c-6fe2-441c-8c8c-71466251a162
* Break up vl.h.pbrook2007-11-171-3/+2Star
| | | | git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3674 c046a42c-6fe2-441c-8c8c-71466251a162
* Split block API from vl.h.pbrook2007-11-111-3/+9
| | | | | | | | Remove QEMU_TOOL. Replace with QEMU_IMG and NEED_CPU_H. Avoid linking qemu-img against whole system emulatior. git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3578 c046a42c-6fe2-441c-8c8c-71466251a162
* find -type f | xargs sed -i 's/[\t ]*$//g' # Yes, again. Note the star in ↵ths2007-09-171-11/+11
| | | | | | the regex. git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3177 c046a42c-6fe2-441c-8c8c-71466251a162
* find -type f | xargs sed -i 's/[\t ]$//g' # on most filesths2007-09-161-48/+48
| | | | git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3173 c046a42c-6fe2-441c-8c8c-71466251a162
* Parallels disk image support, by Alex Beregszaszi.ths2007-08-011-0/+1
| | | | git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3102 c046a42c-6fe2-441c-8c8c-71466251a162
* Use PATH_MAX for name lengths, by Sergey Vlasov.ths2007-02-111-2/+2
| | | | git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2419 c046a42c-6fe2-441c-8c8c-71466251a162
* Define ENOMEDIUM to match ENODEV if it isn't available.ths2007-01-261-4/+0Star
| | | | git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2357 c046a42c-6fe2-441c-8c8c-71466251a162
* Darwin build fix, by Pierre d'Herbemont.ths2007-01-181-0/+4
| | | | git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2334 c046a42c-6fe2-441c-8c8c-71466251a162
* path_is_absolute() fix for win32bellard2007-01-071-0/+5
| | | | git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2307 c046a42c-6fe2-441c-8c8c-71466251a162
* win32 block device fixes (initial patch by kazu)bellard2007-01-071-11/+28
| | | | git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2305 c046a42c-6fe2-441c-8c8c-71466251a162
* Escape filname printout properly, by Anthony Liguori and Julian Seward.ths2006-12-221-3/+6
| | | | git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2263 c046a42c-6fe2-441c-8c8c-71466251a162
* fixed handling of relative filenames with -snapshotbellard2006-08-241-1/+2
| | | | git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2136 c046a42c-6fe2-441c-8c8c-71466251a162
* win32 compilation fixesbellard2006-08-231-4/+11
| | | | git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2134 c046a42c-6fe2-441c-8c8c-71466251a162
* fixed error handlingbellard2006-08-231-1/+3
| | | | git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2133 c046a42c-6fe2-441c-8c8c-71466251a162
* better support of host drivesbellard2006-08-191-59/+159
| | | | git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2124 c046a42c-6fe2-441c-8c8c-71466251a162
* fixed aio emulationbellard2006-08-071-8/+7Star
| | | | git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2099 c046a42c-6fe2-441c-8c8c-71466251a162
* Dynamically allocate AIO Completion Blocks.pbrook2006-08-071-130/+107Star
| | | | git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2098 c046a42c-6fe2-441c-8c8c-71466251a162
* qcow2 is now used for '-snapshot' - keep BlockDriverState.total_sectorsbellard2006-08-061-7/+5Star
| | | | git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2094 c046a42c-6fe2-441c-8c8c-71466251a162
* multiple snapshot supportbellard2006-08-051-8/+136
| | | | git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2086 c046a42c-6fe2-441c-8c8c-71466251a162
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