Commit Graph

271 Commits

Author SHA1 Message Date
aliguori
9f7965c7e9 Expand cache= option and use write-through caching by default
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
2008-10-14 14:42:54 +00:00
aurel32
a0a83536e0 open() can also return EPERM for O_RDWR on a readonly device
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
2008-10-13 21:08:34 +00:00
aliguori
c6ca28d636 Add bdrv_flush_all()
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
2008-10-06 13:55:43 +00:00
aliguori
a76bab4952 Refactor AIO to allow multiple AIO implementations
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
2008-09-22 19:17:18 +00:00
blueswir1
7ee930d031 Fix warnings that would be caused by ld flag --warn-common
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5240 c046a42c-6fe2-441c-8c8c-71466251a162
2008-09-17 19:04:14 +00:00
aliguori
03ff3ca30f Use common objects for qemu-img and qemu-nbd
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
2008-09-15 15:51:35 +00:00
blueswir1
7ccfb2eb5f Fix warnings that would be caused by gcc flag -Wwrite-strings
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5206 c046a42c-6fe2-441c-8c8c-71466251a162
2008-09-14 06:45:34 +00:00
aliguori
7c96d46ec2 Let snapshot work with protocols
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
2008-09-12 17:54:13 +00:00
aliguori
a3392f9b10 Only build compatfd when using AIO and make sure to always init AIO
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
2008-09-11 18:00:19 +00:00
aliguori
baf35cb902 Use signalfd() to work around signal/select race
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
2008-09-10 15:45:19 +00:00
blueswir1
79383c9c08 Fix some warnings that would be generated by gcc -Wredundant-decls
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5115 c046a42c-6fe2-441c-8c8c-71466251a162
2008-08-30 09:51:20 +00:00
aliguori
cd01b4a312 Fix windows build
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
2008-08-21 19:25:45 +00:00
ths
75818250ba Allow QEMU to connect directly to an NBD server, by Laurent Vivier.
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4838 c046a42c-6fe2-441c-8c8c-71466251a162
2008-07-03 13:41:03 +00:00
ths
f58c7b3545 New qemu-img convert -B option, by Marc Bevand.
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4672 c046a42c-6fe2-441c-8c8c-71466251a162
2008-06-05 21:53:49 +00:00
aurel32
34c6f05032 unlink the bs from bdrv-list upon bdrv_delete(bs)
(Uri Lublin)


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4179 c046a42c-6fe2-441c-8c8c-71466251a162
2008-04-08 19:51:21 +00:00
aurel32
b5eff35546 Revert fix for CVE-2008-0928. Will be fixed in a different way later.
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4041 c046a42c-6fe2-441c-8c8c-71466251a162
2008-03-11 23:30:22 +00:00
aurel32
902b27d0b8 Fix CVE-2008-0928 - insufficient block device address range checking
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
2008-03-11 17:17:59 +00:00
aurel32
0badc1ee0e Honor TMPDIR environment variable
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4033 c046a42c-6fe2-441c-8c8c-71466251a162
2008-03-10 00:05:34 +00:00
ths
985a03b0ce Real SCSI device passthrough (v4), by Laurent Vivier.
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3851 c046a42c-6fe2-441c-8c8c-71466251a162
2007-12-24 16:10:43 +00:00
balrog
33f002714b Add "cache" parameter to "-drive" (Laurent Vivier).
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3848 c046a42c-6fe2-441c-8c8c-71466251a162
2007-12-24 14:33:24 +00:00
ths
96b8f136f5 Fix bdrv_get_geometry to return uint64_t, by Andre Przywara.
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3825 c046a42c-6fe2-441c-8c8c-71466251a162
2007-12-17 01:35:20 +00:00
ths
a36e69ddfe Collecting block device statistics, by Richard W.M. Jones.
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3760 c046a42c-6fe2-441c-8c8c-71466251a162
2007-12-02 05:18:19 +00:00
pbrook
9596ebb701 Add statics and missing #includes for prototypes.
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3683 c046a42c-6fe2-441c-8c8c-71466251a162
2007-11-18 01:44:38 +00:00
pbrook
87ecb68bdf Break up vl.h.
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3674 c046a42c-6fe2-441c-8c8c-71466251a162
2007-11-17 17:14:51 +00:00
pbrook
faf07963cb Split block API from vl.h.
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
2007-11-11 02:51:17 +00:00
ths
3b46e62427 find -type f | xargs sed -i 's/[\t ]*$//g' # Yes, again. Note the star in the regex.
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3177 c046a42c-6fe2-441c-8c8c-71466251a162
2007-09-17 08:09:54 +00:00
ths
5fafdf24ef find -type f | xargs sed -i 's/[\t ]$//g' # on most files
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3173 c046a42c-6fe2-441c-8c8c-71466251a162
2007-09-16 21:08:06 +00:00
ths
6ada7453aa Parallels disk image support, by Alex Beregszaszi.
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3102 c046a42c-6fe2-441c-8c8c-71466251a162
2007-07-31 23:28:53 +00:00
ths
eb5c851f2d Use PATH_MAX for name lengths, by Sergey Vlasov.
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2419 c046a42c-6fe2-441c-8c8c-71466251a162
2007-02-11 15:06:09 +00:00
ths
71c2fd5cdf Define ENOMEDIUM to match ENODEV if it isn't available.
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2357 c046a42c-6fe2-441c-8c8c-71466251a162
2007-01-26 15:37:46 +00:00
ths
7f1c9da998 Darwin build fix, by Pierre d'Herbemont.
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2334 c046a42c-6fe2-441c-8c8c-71466251a162
2007-01-18 22:43:16 +00:00
bellard
21664424ed path_is_absolute() fix for win32
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2307 c046a42c-6fe2-441c-8c8c-71466251a162
2007-01-07 18:22:37 +00:00
bellard
3b9f94e1a8 win32 block device fixes (initial patch by kazu)
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2305 c046a42c-6fe2-441c-8c8c-71466251a162
2007-01-07 17:27:07 +00:00
ths
fef3074347 Escape filname printout properly, by Anthony Liguori and Julian Seward.
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2263 c046a42c-6fe2-441c-8c8c-71466251a162
2006-12-22 14:11:32 +00:00
bellard
a817d93656 fixed handling of relative filenames with -snapshot
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2136 c046a42c-6fe2-441c-8c8c-71466251a162
2006-08-24 19:53:37 +00:00
bellard
f45512feac win32 compilation fixes
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2134 c046a42c-6fe2-441c-8c8c-71466251a162
2006-08-23 21:40:13 +00:00
bellard
6b21b973ab fixed error handling
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2133 c046a42c-6fe2-441c-8c8c-71466251a162
2006-08-23 21:14:37 +00:00
bellard
19cb37389f better support of host drives
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2124 c046a42c-6fe2-441c-8c8c-71466251a162
2006-08-19 11:45:59 +00:00
bellard
90765429aa fixed aio emulation
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2099 c046a42c-6fe2-441c-8c8c-71466251a162
2006-08-07 19:10:16 +00:00
pbrook
ce1a14dc0d Dynamically allocate AIO Completion Blocks.
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2098 c046a42c-6fe2-441c-8c8c-71466251a162
2006-08-07 02:38:06 +00:00
bellard
d15a771da1 qcow2 is now used for '-snapshot' - keep BlockDriverState.total_sectors
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2094 c046a42c-6fe2-441c-8c8c-71466251a162
2006-08-06 13:35:09 +00:00
bellard
faea38e786 multiple snapshot support
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2086 c046a42c-6fe2-441c-8c8c-71466251a162
2006-08-05 21:31:00 +00:00
bellard
83f6409109 async file I/O API
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2075 c046a42c-6fe2-441c-8c8c-71466251a162
2006-08-01 16:21:11 +00:00
bellard
beac80cd43 Windows sparse file support (Frediano Ziglio)
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2027 c046a42c-6fe2-441c-8c8c-71466251a162
2006-06-26 20:08:57 +00:00
pbrook
7a6cba611d Disk cache flush support.
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1949 c046a42c-6fe2-441c-8c8c-71466251a162
2006-06-04 11:39:07 +00:00
bellard
ec530c81ef Solaris port (Ben Taylor)
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1855 c046a42c-6fe2-441c-8c8c-71466251a162
2006-04-25 22:36:06 +00:00
bellard
95389c8681 qcow_make_empty() support (Johannes Schindelin)
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1716 c046a42c-6fe2-441c-8c8c-71466251a162
2005-12-18 18:28:15 +00:00
bellard
79639d423f update boot sector when using -kernel (Magnus Damm)
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1664 c046a42c-6fe2-441c-8c8c-71466251a162
2005-11-26 10:58:41 +00:00
bellard
3b0d4f61c9 OS X: support for the built in CD-ROM drive (Mike Kronenberg)
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1583 c046a42c-6fe2-441c-8c8c-71466251a162
2005-10-30 18:30:10 +00:00
bellard
712e78744e probing fixes
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1425 c046a42c-6fe2-441c-8c8c-71466251a162
2005-04-28 21:09:32 +00:00
bellard
6a0f9e82c5 Virtual PC read-only disk image support (Alex Beregszaszi)
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1417 c046a42c-6fe2-441c-8c8c-71466251a162
2005-04-27 20:17:58 +00:00
bellard
e5484d3391 BSD fix
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1413 c046a42c-6fe2-441c-8c8c-71466251a162
2005-04-27 19:55:01 +00:00
bellard
7674e7bf08 BSD cdrom device access fix
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1412 c046a42c-6fe2-441c-8c8c-71466251a162
2005-04-26 21:59:26 +00:00
bellard
c747cd1fa2 raw CDROM access for windows (Filip Navara)
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1411 c046a42c-6fe2-441c-8c8c-71466251a162
2005-04-26 21:47:02 +00:00
bellard
a8753c3466 Bochs disk image support (Alex Beregszaszi)
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1409 c046a42c-6fe2-441c-8c8c-71466251a162
2005-04-26 21:34:00 +00:00
bellard
585d0ed98b .dmg disk image format support (Johannes Schindelin)
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1171 c046a42c-6fe2-441c-8c8c-71466251a162
2004-12-12 11:24:44 +00:00
bellard
46d4767d93 better BIOS ATA translation support
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1153 c046a42c-6fe2-441c-8c8c-71466251a162
2004-11-16 01:45:27 +00:00
bellard
3c56521b70 cloop driver (Johannes Schindelin)
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1076 c046a42c-6fe2-441c-8c8c-71466251a162
2004-09-29 21:29:14 +00:00
bellard
e2731add29 fixed block close() method prototype
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1068 c046a42c-6fe2-441c-8c8c-71466251a162
2004-09-18 19:32:11 +00:00
bellard
d5249393ef 64 bit file I/O by default
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1040 c046a42c-6fe2-441c-8c8c-71466251a162
2004-08-03 21:14:23 +00:00
bellard
ea2384d36e new disk image layer
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1037 c046a42c-6fe2-441c-8c8c-71466251a162
2004-08-01 21:59:26 +00:00
bellard
81d0912d2d completion support
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1020 c046a42c-6fe2-441c-8c8c-71466251a162
2004-07-14 17:21:37 +00:00
bellard
eba2af633f buffer overflow fix
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@932 c046a42c-6fe2-441c-8c8c-71466251a162
2004-06-19 17:23:39 +00:00
bellard
2b64948eb5 64 bit fix
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@790 c046a42c-6fe2-441c-8c8c-71466251a162
2004-05-08 15:27:20 +00:00
bellard
67b915a5dd win32 port (initial patch by kazu)
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@692 c046a42c-6fe2-441c-8c8c-71466251a162
2004-03-31 23:37:16 +00:00
bellard
b338082b3f remoable device support
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@658 c046a42c-6fe2-441c-8c8c-71466251a162
2004-03-14 21:38:54 +00:00
bellard
00af2b2680 added cow.h
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@653 c046a42c-6fe2-441c-8c8c-71466251a162
2004-02-26 00:20:56 +00:00
bellard
cf98951b82 force boot sector feature
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@616 c046a42c-6fe2-441c-8c8c-71466251a162
2004-02-16 21:56:36 +00:00
bellard
33e3963e1b added user mode Linux Copy On Write disk image support - added -snapshot support (initial patch by Rusty Russell)
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@309 c046a42c-6fe2-441c-8c8c-71466251a162
2003-07-06 17:15:21 +00:00
bellard
0849bf0821 allow read only images
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@299 c046a42c-6fe2-441c-8c8c-71466251a162
2003-06-30 23:17:31 +00:00
bellard
fc01f7e7f9 IDE emulation
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@291 c046a42c-6fe2-441c-8c8c-71466251a162
2003-06-30 10:03:06 +00:00