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Stefan Hajnoczi 5d6e96efb8 blockdev: acquire AioContext in QMP 'transaction' actions
The transaction QMP command performs operations atomically on a group of
drives.  This command needs to acquire AioContext in order to work
safely when virtio-blk dataplane IOThreads are accessing drives.

The transactional nature of the command means that actions are split
into prepare, commit, abort, and clean functions.  Acquire the
AioContext in prepare and don't release it until one of the other
functions is called.  This prevents the IOThread from running the
AioContext before the transaction has completed.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-id: 1416566940-4430-4-git-send-email-stefanha@redhat.com
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2014-12-10 10:31:13 +01:00
audio audio: Drop superfluous conditionals around g_free() 2014-06-13 12:34:54 +02:00
backends pci, pc, virtio, misc bugfixes 2014-09-18 20:02:01 +01:00
block raw: Prohibit dangerous writes for probed images 2014-12-10 10:31:13 +01:00
bsd-user bsd-user: Fix syscall format, add strace support for more syscalls 2014-06-11 00:25:06 +01:00
default-configs mips: Remove CONFIG_VT82C686 from non-Fulong configs 2014-11-07 11:15:49 +00:00
disas disas/mips.c: disassemble MSA instructions 2014-11-03 11:48:35 +00:00
docs Tracing docs fix configure option and description 2014-11-18 14:05:54 +00:00
dtc@bc895d6d09
fpu softfloat: add functions corresponding to IEEE-2008 min/maxNumMag 2014-10-14 13:28:51 +01:00
fsdev virtfs-proxy-helper: fix call to accept 2014-04-28 08:55:32 +04:00
gdb-xml s390x/gdb: add the feature xml files for s390x 2014-09-01 09:45:19 +02:00
hw blockdev: acquire AioContext in QMP 'transaction' actions 2014-12-10 10:31:13 +01:00
include raw: Prohibit dangerous writes for probed images 2014-12-10 10:31:13 +01:00
libcacard libcacard: fix resource leak 2014-11-14 12:15:40 +01:00
libdecnumber libdecnumber: Fix warnings from smatch (missing static, boolean operations) 2014-08-24 13:21:06 +04:00
linux-headers linux-headers: update to 3.18-rc5 2014-11-18 11:24:31 +00:00
linux-user linux-user: Fix up timer id handling 2014-11-11 08:13:09 +02:00
net net/socket: fix Uninitialized scalar variable 2014-11-21 10:50:54 +00:00
pc-bios Update OpenBIOS images 2014-11-15 13:01:44 +00:00
pixman@87eea99e44 pixman: update internal copy to pixman-0.32.6 2014-09-15 08:14:19 +02:00
po po: fix conflict with %.mo rule in rules.mak 2014-09-26 13:35:08 +02:00
qapi block/qapi: Add cache information to query-block 2014-12-10 10:31:09 +01:00
qga qga: fix false negative argument passing 2014-11-17 11:41:25 +01:00
qobject qjson: Drop trailing space for pretty formatting 2014-12-10 10:25:30 +01:00
qom qom/cpu: remove the unused CPU hot-plug notifier 2014-11-02 13:44:11 +02:00
roms Update OpenBIOS images 2014-11-15 13:01:44 +00:00
scripts Tracing: Fix simpletrace.py error on tcg enabled binary traces 2014-11-18 14:05:58 +00:00
slirp slirp: udp: fix NULL pointer dereference because of uninitialized socket 2014-09-23 19:15:05 +01:00
stubs block: Code motion to get rid of stubs/blockdev.c 2014-10-20 13:41:26 +02:00
sysconfigs/target
target-alpha target-alpha: Use cpu_exec_interrupt qom hook 2014-09-25 18:54:21 +01:00
target-arm target-arm: handle address translations that start at level 3 2014-11-17 19:30:28 +00:00
target-cris target-cris/translate.c: fix out of bounds read 2014-11-17 13:59:23 +01:00
target-i386 apic: avoid getting out of halted state on masked PIC interrupts 2014-11-24 14:37:30 +01:00
target-lm32 gdbstub: Allow target CPUs to specify watchpoint STOP_BEFORE_ACCESS flag 2014-10-06 14:25:43 +01:00
target-m68k target-m68k: Use cpu_exec_interrupt qom hook 2014-09-25 18:54:21 +01:00
target-microblaze target-microblaze: Use cpu_exec_interrupt qom hook 2014-09-25 18:54:22 +01:00
target-mips target-mips: fix multiple TCG registers covering same data 2014-11-07 14:15:28 +00:00
target-moxie softmmu: introduce cpu_ldst.h 2014-06-05 16:10:33 +02:00
target-openrisc target-openrisc: Use cpu_exec_interrupt qom hook 2014-09-25 18:54:22 +01:00
target-ppc target-ppc: Altivec's mtvscr Decodes Wrong Register 2014-11-20 14:52:01 +01:00
target-s390x s390x/kvm: Fix compile error 2014-11-26 12:11:27 +01:00
target-sh4 target-sh4: Use cpu_exec_interrupt qom hook 2014-09-25 18:54:22 +01:00
target-sparc target-sparc: Use cpu_exec_interrupt qom hook 2014-09-25 18:54:22 +01:00
target-tricore target-tricore: Add instructions of BO opcode format 2014-10-20 12:25:07 +01:00
target-unicore32 target-unicore32: Use cpu_exec_interrupt qom hook 2014-09-25 18:54:22 +01:00
target-xtensa target-xtensa: add missing window check for entry 2014-11-10 17:59:13 +03:00
tcg tcg/mips: fix store softmmu slow path 2014-11-02 13:30:00 +01:00
tests qemu-iotests: Test writing non-raw image headers to raw image 2014-12-10 10:31:13 +01:00
trace trace: [hmp] Reimplement "trace-event" and "info trace-events" using QMP 2014-09-26 09:34:38 +01:00
ui input: move input-send-event into experimental namespace 2014-11-25 17:03:31 +00:00
util memory: expose alignment used for allocating RAM as MemoryRegion API 2014-11-23 12:11:30 +02:00
.exrc
.gitignore trace: [tcg] Generate TCG tracing routines 2014-08-12 14:26:12 +01:00
.gitmodules PPC: Add u-boot firmware for e500 2014-06-16 13:24:35 +02:00
.mailmap
.travis.yml .travis.yml: remove "make check" from main matrix 2014-09-26 21:05:06 +04:00
accel.c accel: Create accel object when initializing machine 2014-10-09 15:36:14 +02:00
aio-posix.c AioContext: introduce aio_prepare 2014-08-29 10:46:58 +01:00
aio-win32.c aio-win32: avoid out-of-bounds access to the events array 2014-09-22 11:39:21 +01:00
arch_init.c migration: static variables will not be reset at second migration 2014-11-20 18:17:22 +05:30
async.c async: aio_context_new(): Handle event_notifier_init failure 2014-09-22 11:39:48 +01:00
balloon.c qapi event: convert BALLOON_CHANGE 2014-06-23 11:12:28 -04:00
block-migration.c block: Rename BlockDriverAIOCB* to BlockAIOCB* 2014-10-20 13:41:27 +02:00
block.c raw: Prohibit dangerous writes for probed images 2014-12-10 10:31:13 +01:00
blockdev-nbd.c nbd: Change external interface to BlockBackend 2014-12-10 10:31:12 +01:00
blockdev.c blockdev: acquire AioContext in QMP 'transaction' actions 2014-12-10 10:31:13 +01:00
blockjob.c block: declare blockjobs and dataplane friends! 2014-11-03 11:41:49 +00:00
bootdevice.c bootindex: change fprintf to error_report 2014-10-15 10:46:01 +02:00
bt-host.c
bt-vhci.c
Changelog
CODING_STYLE CODING_STYLE: Section about conditional statement 2014-08-15 18:54:06 +04:00
configure seccomp: change configure to avoid arm 32 to break 2014-11-11 17:05:21 +01:00
COPYING
COPYING.LIB
coroutine-gthread.c glib-compat.h: add new thread API emulation on top of pre-2.31 API 2014-06-10 07:44:01 +02:00
coroutine-sigaltstack.c coroutine-sigaltstack: Change jmp_buf to sigjmp_buf 2014-11-11 11:07:55 +03:00
coroutine-ucontext.c
coroutine-win32.c coroutine-win32.c: Add noinline attribute to work around gcc bug 2014-06-26 14:08:14 +01:00
cpu-exec.c cpu-exec: Do CPU_INTERRUPT_HALT unconditionally 2014-09-25 18:54:22 +01:00
cpus.c Introduce cpu_clean_all_dirty 2014-09-16 11:04:09 +02:00
cputlb.c implementing victim TLB for QEMU system emulated TLB 2014-09-01 17:43:06 +01:00
device_tree.c device_tree.c: dump all err mesages with error_report 2014-09-02 22:38:16 +04:00
device-hotplug.c blockdev: Eliminate drive_del() 2014-10-20 13:41:26 +02:00
disas.c monitor: QEMU Monitor Instruction Disassembly Incorrect for PowerPC LE Mode 2014-06-16 13:24:26 +02:00
dma-helpers.c hw: Convert from BlockDriverState to BlockBackend, mostly 2014-10-20 14:02:25 +02:00
dump.c dump: Fix dump-guest-memory termination and use-after-close 2014-11-02 10:04:34 +03:00
exec.c memory: expose alignment used for allocating RAM as MemoryRegion API 2014-11-23 12:11:30 +02:00
gdbstub.c gdbstub: Add a missing case of signal number translation in gdbstub 2014-11-11 08:58:30 +03:00
HACKING
hmp-commands.hx hmp: Remove "info pcmcia" 2014-10-24 12:19:11 +01:00
hmp.c block/hmp: Allow node-name in 'info block' 2014-12-10 10:31:11 +01:00
hmp.h Add HMP command "info memory-devices" 2014-09-26 13:37:06 -04:00
iohandler.c iohandler.c: Properly initialize sigaction struct 2014-05-24 00:07:29 +04:00
ioport.c memory: convert memory_region_destroy to object_unparent 2014-08-18 12:06:20 +02:00
iothread.c async: aio_context_new(): Handle event_notifier_init failure 2014-09-22 11:39:48 +01:00
kvm-all.c pc: kvm: check if KVM has free memory slots to avoid abort() 2014-11-23 12:11:29 +02:00
kvm-stub.c pc: kvm: check if KVM has free memory slots to avoid abort() 2014-11-23 12:11:29 +02:00
LICENSE
main-loop.c Revert "main-loop.c: Handle SIGINT, SIGHUP and SIGTERM synchronously" 2014-10-27 15:05:09 +00:00
MAINTAINERS Add Migration maintainer 2014-11-11 09:46:46 +01:00
Makefile trace: install trace-events file 2014-09-26 09:34:39 +01:00
Makefile.objs qemu-file: Move stdio implementation to qemu-file-stdio.c 2014-10-14 10:29:28 +02:00
Makefile.target bootdevice: move bootdevice related code to new file bootdevice.c 2014-10-15 09:49:48 +02:00
memory_mapping.c Add skip_dump flag to ignore memory region during dump 2014-10-31 11:29:01 +01:00
memory.c memory: expose alignment used for allocating RAM as MemoryRegion API 2014-11-23 12:11:30 +02:00
migration-exec.c
migration-fd.c
migration-rdma.c rdma: Fix incorrect description in comments 2014-09-20 17:55:53 +04:00
migration-tcp.c qemu-sockets: Add error to non-blocking connect handler 2014-10-09 15:36:15 +02:00
migration-unix.c qemu-sockets: Add error to non-blocking connect handler 2014-10-09 15:36:15 +02:00
migration.c block/migration: Disable cache invalidate for incoming migration 2014-10-14 09:35:21 +02:00
module-common.c
monitor.c monitor: Fix HMP tab completion 2014-12-10 10:31:11 +01:00
nbd.c nbd: Use BlockBackend internally 2014-12-10 10:31:12 +01:00
numa.c numa: make 'info numa' take into account hotplugged memory 2014-11-11 08:50:58 +03:00
os-posix.c os-posix: reorder parent notification for -daemonize 2014-11-02 10:04:34 +03:00
os-win32.c pidfile: stop making pidfile error a special case 2014-11-02 10:04:34 +03:00
page_cache.c migration: Plug memory leak in migrate-set-cache-size command 2014-06-10 19:54:43 +04:00
qapi-schema.json input: move input-send-event into experimental namespace 2014-11-25 17:03:31 +00:00
qdev-monitor.c qdev: Use qdev_get_device_class() for -device <type>,help 2014-11-04 17:50:00 +01:00
qdict-test-data.txt
qemu-bridge-helper.c qemu-bridge-helper: Fix fd leak in main() 2014-06-27 10:39:10 +02:00
qemu-char.c qemu-char: fix tcp_get_fds 2014-11-23 12:11:29 +02:00
qemu-coroutine-io.c qemu-coroutine-io: fix for Win32 2014-08-29 10:46:58 +01:00
qemu-coroutine-lock.c
qemu-coroutine-sleep.c coroutine: Drop co_sleep_ns 2014-08-29 10:46:58 +01:00
qemu-coroutine.c coroutine: make pool size dynamic 2014-08-15 15:07:14 +02:00
qemu-doc.texi qemu-doc.texi: fix typos in x509 examples 2014-11-05 09:53:18 +03:00
qemu-file-stdio.c qemu-file: Move stdio implementation to qemu-file-stdio.c 2014-10-14 10:29:28 +02:00
qemu-file-unix.c qemu-file: Move unix and socket implementations to qemu-file-unix.c 2014-10-14 10:29:28 +02:00
qemu-file.c qemu-file: Move stdio implementation to qemu-file-stdio.c 2014-10-14 10:29:28 +02:00
qemu-img-cmds.hx qemu-img: Add progress output for amend 2014-11-03 11:41:48 +00:00
qemu-img.c qemu-img: Omit error_report() after img_open() 2014-11-06 12:45:47 +01:00
qemu-img.texi qemu-img: Add progress output for amend 2014-11-03 11:41:48 +00:00
qemu-io-cmds.c qemu-io: Respect early image end for map 2014-10-23 15:34:02 +02:00
qemu-io.c qemu-io: Allow explicitly specifying format 2014-12-10 10:31:12 +01:00
qemu-log.c
qemu-nbd.c qemu-nbd: Use BlockBackend where reasonable 2014-12-10 10:31:12 +01:00
qemu-nbd.texi nbd: Miscellaneous typo fixes. 2014-05-24 00:07:29 +04:00
qemu-options-wrapper.h
qemu-options.h
qemu-options.hx chardev: Add -qmp-pretty 2014-12-10 10:25:30 +01:00
qemu-seccomp.c seccomp: whitelist syscalls fallocate(), fadvise64(), inotify_init1() and inotify_add_watch() 2014-11-11 17:01:35 +01:00
qemu-tech.texi
qemu-timer.c qemu-timer: Avoid overflows when converting timeout to struct timespec 2014-11-27 11:31:58 +00:00
qemu.nsi
qemu.sasl
qmp-commands.hx qmp: Add optional switch "query-nodes" in query-blockstats 2014-12-10 10:25:29 +01:00
qmp.c qmp: Print descriptions of object properties 2014-10-15 05:03:15 +02:00
qtest.c qtest: fix qtest log fd should be initialized before qtest chardev 2014-10-23 16:41:27 +02:00
README
rules.mak rules.mak: Allow .mo-objs and .mo-cflags in -y variables 2014-10-31 11:26:25 +01:00
savevm.c snapshot: Reset err to NULL to avoid double free 2014-11-03 09:48:41 +00:00
softmmu_template.h softmmu: provide softmmu access type enum 2014-11-03 11:48:34 +00:00
spice-qemu-char.c qemu-char: Rename register_char_driver_qapi() to register_char_driver() 2014-09-16 23:36:32 +01:00
tcg-runtime.c tcg: Push tcg-runtime routines into exec/helper-* 2014-05-28 09:33:54 -07:00
tci.c Merge remote-tracking branch 'remotes/bonzini/softmmu-smap' into staging 2014-06-05 21:06:14 +01:00
thread-pool.c block: Rename BlockDriverCompletionFunc to BlockCompletionFunc 2014-10-20 13:41:27 +02:00
thunk.c
tpm.c
trace-events megasas: Fixup MSI-X handling 2014-10-31 11:29:01 +01:00
translate-all.c translate-all.c: memory walker initial address miscalculation 2014-10-06 21:53:35 +03:00
translate-all.h
user-exec.c softmmu: introduce cpu_ldst.h 2014-06-05 16:10:33 +02:00
VERSION Open 2.3 development tree 2014-12-09 21:48:34 +00:00
version.rc
vl.c chardev: Add -qmp-pretty 2014-12-10 10:25:30 +01:00
vmstate.c vmstate: Allow dynamic allocation for VBUFFER during migration 2014-10-14 09:35:48 +02:00
xbzrle.c
xen-common-stub.c accel: Move Xen registration code to xen-common.c 2014-10-04 08:59:15 +02:00
xen-common.c accel: Pass MachineState object to accel init functions 2014-10-09 12:57:10 +02:00
xen-hvm-stub.c xen-hvm: Fix xen_hvm_init() to adjust pc memory layout 2014-06-23 17:50:04 +03:00
xen-hvm.c xen-hvm: Remove redundant variable 'xstate' 2014-11-11 17:34:53 +03:00
xen-mapcache.c xen: build on ARM 2014-07-07 10:37:40 +00:00

Read the documentation in qemu-doc.html or on http://wiki.qemu-project.org

- QEMU team