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2008-09-22Refactor AIO to allow multiple AIO implementationsaliguori
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
2008-09-17Fix warnings that would be caused by ld flag --warn-commonblueswir1
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5240 c046a42c-6fe2-441c-8c8c-71466251a162
2008-09-15Use common objects for qemu-img and qemu-nbdaliguori
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
2008-09-14Fix warnings that would be caused by gcc flag -Wwrite-stringsblueswir1
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5206 c046a42c-6fe2-441c-8c8c-71466251a162
2008-09-12Let snapshot work with protocolsaliguori
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
2008-09-11Only build compatfd when using AIO and make sure to always init AIOaliguori
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
2008-09-10Use signalfd() to work around signal/select racealiguori
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
2008-08-30Fix some warnings that would be generated by gcc -Wredundant-declsblueswir1
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5115 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-21Fix windows buildaliguori
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
2008-07-03Allow QEMU to connect directly to an NBD server, by Laurent Vivier.ths
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4838 c046a42c-6fe2-441c-8c8c-71466251a162
2008-06-05New qemu-img convert -B option, by Marc Bevand.ths
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4672 c046a42c-6fe2-441c-8c8c-71466251a162
2008-04-08unlink the bs from bdrv-list upon bdrv_delete(bs)aurel32
(Uri Lublin) git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4179 c046a42c-6fe2-441c-8c8c-71466251a162
2008-03-11Revert fix for CVE-2008-0928. Will be fixed in a different way later.aurel32
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4041 c046a42c-6fe2-441c-8c8c-71466251a162
2008-03-11Fix CVE-2008-0928 - insufficient block device address range checkingaurel32
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
2008-03-10Honor TMPDIR environment variableaurel32
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4033 c046a42c-6fe2-441c-8c8c-71466251a162
2007-12-24Real SCSI device passthrough (v4), by Laurent Vivier.ths
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3851 c046a42c-6fe2-441c-8c8c-71466251a162
2007-12-24Add "cache" parameter to "-drive" (Laurent Vivier).balrog
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3848 c046a42c-6fe2-441c-8c8c-71466251a162
2007-12-17Fix bdrv_get_geometry to return uint64_t, by Andre Przywara.ths
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3825 c046a42c-6fe2-441c-8c8c-71466251a162
2007-12-02Collecting block device statistics, by Richard W.M. Jones.ths
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3760 c046a42c-6fe2-441c-8c8c-71466251a162
2007-11-18Add statics and missing #includes for prototypes.pbrook
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3683 c046a42c-6fe2-441c-8c8c-71466251a162
2007-11-17Break up vl.h.pbrook
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3674 c046a42c-6fe2-441c-8c8c-71466251a162
2007-11-11Split block API from vl.h.pbrook
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
2007-09-17find -type f | xargs sed -i 's/[\t ]*$//g' # Yes, again. Note the star in ↵ths
the regex. git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3177 c046a42c-6fe2-441c-8c8c-71466251a162
2007-09-16find -type f | xargs sed -i 's/[\t ]$//g' # on most filesths
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3173 c046a42c-6fe2-441c-8c8c-71466251a162
2007-07-31Parallels disk image support, by Alex Beregszaszi.ths
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3102 c046a42c-6fe2-441c-8c8c-71466251a162
2007-02-11Use PATH_MAX for name lengths, by Sergey Vlasov.ths
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2419 c046a42c-6fe2-441c-8c8c-71466251a162
2007-01-26Define ENOMEDIUM to match ENODEV if it isn't available.ths
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2357 c046a42c-6fe2-441c-8c8c-71466251a162
2007-01-18Darwin build fix, by Pierre d'Herbemont.ths
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2334 c046a42c-6fe2-441c-8c8c-71466251a162
2007-01-07path_is_absolute() fix for win32bellard
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2307 c046a42c-6fe2-441c-8c8c-71466251a162
2007-01-07win32 block device fixes (initial patch by kazu)bellard
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2305 c046a42c-6fe2-441c-8c8c-71466251a162
2006-12-22Escape filname printout properly, by Anthony Liguori and Julian Seward.ths
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2263 c046a42c-6fe2-441c-8c8c-71466251a162
2006-08-24fixed handling of relative filenames with -snapshotbellard
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2136 c046a42c-6fe2-441c-8c8c-71466251a162
2006-08-23win32 compilation fixesbellard
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2134 c046a42c-6fe2-441c-8c8c-71466251a162
2006-08-23fixed error handlingbellard
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2133 c046a42c-6fe2-441c-8c8c-71466251a162
2006-08-19better support of host drivesbellard
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2124 c046a42c-6fe2-441c-8c8c-71466251a162
2006-08-07fixed aio emulationbellard
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2099 c046a42c-6fe2-441c-8c8c-71466251a162
2006-08-07Dynamically allocate AIO Completion Blocks.pbrook
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2098 c046a42c-6fe2-441c-8c8c-71466251a162
2006-08-06qcow2 is now used for '-snapshot' - keep BlockDriverState.total_sectorsbellard
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2094 c046a42c-6fe2-441c-8c8c-71466251a162
2006-08-05multiple snapshot supportbellard
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2086 c046a42c-6fe2-441c-8c8c-71466251a162
2006-08-01async file I/O APIbellard
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2075 c046a42c-6fe2-441c-8c8c-71466251a162
2006-06-26Windows sparse file support (Frediano Ziglio)bellard
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2027 c046a42c-6fe2-441c-8c8c-71466251a162
2006-06-04Disk cache flush support.pbrook
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1949 c046a42c-6fe2-441c-8c8c-71466251a162
2006-04-25Solaris port (Ben Taylor)bellard
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1855 c046a42c-6fe2-441c-8c8c-71466251a162
2005-12-18qcow_make_empty() support (Johannes Schindelin)bellard
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1716 c046a42c-6fe2-441c-8c8c-71466251a162
2005-11-26update boot sector when using -kernel (Magnus Damm)bellard
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1664 c046a42c-6fe2-441c-8c8c-71466251a162
2005-10-30OS X: support for the built in CD-ROM drive (Mike Kronenberg)bellard
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1583 c046a42c-6fe2-441c-8c8c-71466251a162
2005-04-28probing fixesbellard
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1425 c046a42c-6fe2-441c-8c8c-71466251a162
2005-04-27Virtual PC read-only disk image support (Alex Beregszaszi)bellard
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1417 c046a42c-6fe2-441c-8c8c-71466251a162
2005-04-27BSD fixbellard
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1413 c046a42c-6fe2-441c-8c8c-71466251a162
2005-04-26BSD cdrom device access fixbellard
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1412 c046a42c-6fe2-441c-8c8c-71466251a162
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