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QEMU With E2K User Support
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Jeff Cody 54e2690090 block: extend block-commit to accept a string for the backing file 
On some image chains, QEMU may not always be able to resolve the
filenames properly, when updating the backing file of an image
after a block commit.

For instance, certain relative pathnames may fail, or drives may
have been specified originally by file descriptor (e.g. /dev/fd/???),
or a relative protocol pathname may have been used.

In these instances, QEMU may lack the information to be able to make
the correct choice, but the user or management layer most likely does
have that knowledge.

With this extension to the block-commit api, the user is able to change
the backing file of the overlay image as part of the block-commit
operation.

This allows the change to be 'safe', in the sense that if the attempt
to write the overlay image metadata fails, then the block-commit
operation returns failure, without disrupting the guest.

If the commit top is the active layer, then specifying the backing
file string will be treated as an error (there is no overlay image
to modify in that case).

If a backing file string is not specified in the command, the backing
file string to use is determined in the same manner as it was
previously.

Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Jeff Cody <jcody@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
 		2014-07-01 10:47:01 +02:00
audio audio: Drop superfluous conditionals around g_free() 2014-06-13 12:34:54 +02:00
backends rng-random: NULL check not needed before g_free() 2014-06-24 20:01:24 +04:00
block block: extend block-commit to accept a string for the backing file 2014-07-01 10:47:01 +02:00
bsd-user bsd-user: Fix syscall format, add strace support for more syscalls 2014-06-11 00:25:06 +01:00
default-configs pc: implement pc-dimm device abstraction 2014-06-19 16:41:47 +03:00
disas disas/libvixl: Fix wrong format strings 2014-06-29 22:04:28 +01:00
docs qapi: Change back sector-count to sectors-count in quorum QAPI events. 2014-07-01 10:15:34 +02:00
dtc@bc895d6d09 dtc: add submodule 2013-04-18 13:50:53 +02:00
fpu fpu: softfloat: drop INLINE macro 2014-06-23 11:00:12 -04:00
fsdev virtfs-proxy-helper: fix call to accept 2014-04-28 08:55:32 +04:00
gdb-xml target-arm: Support fp registers in gdb stub 2013-12-17 19:42:32 +00:00
hw virtio-blk: remove need for explicit x-data-plane=on option 2014-07-01 09:15:02 +02:00
include block: extend block-commit to accept a string for the backing file 2014-07-01 10:47:01 +02:00
libcacard vscclient: Add required headers to fix build on FreeBSD 2014-06-24 20:01:24 +04:00
libdecnumber libdecnumber: Fix decNumberSetBCD 2014-06-16 13:24:29 +02:00
linux-headers linux-headers: update linux headers to kvm/next 2014-06-16 13:24:41 +02:00
linux-user Merge remote-tracking branch 'remotes/riku/linux-user-for-upstream' into staging 2014-06-29 16:44:13 +01:00
net net: move queue number into NICPeers 2014-06-27 11:19:31 +02:00
pc-bios pc-bios/s390-ccw: update binary 2014-06-27 12:11:53 +02:00
pixman@97336fad32 qapi: move include files to include/qobject/ 2012-12-19 08:31:31 +01:00
po po: add proper Language: tags to .po files 2014-04-28 08:55:32 +04:00
qapi block: extend block-commit to accept a string for the backing file 2014-07-01 10:47:01 +02:00
qga qga: Fix handle fd leak in acquire_privilege() 2014-06-03 15:07:59 -05:00
qobject json-lexer: fix escaped backslash in single-quoted string 2014-06-23 11:01:24 -04:00
qom qom: add object_property_add_alias() 2014-07-01 09:15:02 +02:00
roms Update OpenBIOS images 2014-06-20 23:59:19 +01:00
scripts qapi script: clean up in scripts 2014-06-27 09:27:56 -04:00
slirp Increase maximum number of session of the internal TFTP server. 2014-06-24 20:01:24 +04:00
stubs Merge remote-tracking branch 'remotes/qmp-unstable/queue/qmp' into staging 2014-06-24 13:06:13 +01:00
sysconfigs/target Eliminate cpus-x86_64.conf file 2012-09-21 15:12:58 +02:00
target-alpha softmmu: introduce cpu_ldst.h 2014-06-05 16:10:33 +02:00
target-arm Fix new typos (found by codespell) 2014-06-24 20:01:24 +04:00
target-cris target-cris/translate.c: Remove _t_gen_mov_TN_env and _t_gen_mov_env_TN 2014-06-09 01:04:44 +02:00
target-i386 target-i386: Broadwell CPU model 2014-06-25 23:54:57 +02:00
target-lm32 vl: allow other threads to do qemu_system_vmstop_request 2014-06-23 16:36:13 +08:00
target-m68k softmmu: introduce cpu_ldst.h 2014-06-05 16:10:33 +02:00
target-microblaze target-microblaze: Delete unused sign_extend() function 2014-06-10 19:39:34 +04:00
target-mips target-mips: copy CP0_Config1 into DisasContext 2014-06-20 22:14:13 +02:00
target-moxie softmmu: introduce cpu_ldst.h 2014-06-05 16:10:33 +02:00
target-openrisc openrisc: fix comment 2014-06-29 18:59:06 +03:00
target-ppc target-ppc: enable virtio endian ambivalent support 2014-06-29 19:39:43 +03:00
target-s390x target-s390x: Remove unused ld_code6() function 2014-06-24 20:01:24 +04:00
target-sh4 softmmu: introduce cpu_ldst.h 2014-06-05 16:10:33 +02:00
target-sparc softmmu: introduce cpu_ldst.h 2014-06-05 16:10:33 +02:00
target-unicore32 target-unicore: Remove unused functions 2014-06-24 20:01:24 +04:00
target-xtensa softmmu: introduce cpu_ldst.h 2014-06-05 16:10:33 +02:00
tcg tcg/ppc: Fix support for 64-bit PPC MacOSX hosts 2014-06-29 11:38:50 +01:00
tests block: make 'top' argument to block-commit optional 2014-07-01 10:15:33 +02:00
trace glib-compat.h: add new thread API emulation on top of pre-2.31 API 2014-06-10 07:44:01 +02:00
ui ui/cocoa: Honour -show-cursor command line option 2014-06-29 22:00:33 +01:00
util qemu_opts_append: Play nicely with QemuOptsList's head 2014-06-26 15:53:52 +02:00
.exrc qemu: add .exrc 2012-09-07 09:02:44 +03:00
.gitignore qapi: ignore generated event files 2014-06-27 09:27:55 -04:00
.gitmodules PPC: Add u-boot firmware for e500 2014-06-16 13:24:35 +02:00
.mailmap Update mailmap 2013-09-05 09:40:31 -05:00
.travis.yml trace: Multi-backend tracing 2014-06-09 15:43:40 +02:00
CODING_STYLE CODING_STYLE: Section about mixed declarations 2014-03-27 19:22:49 +04:00
COPYING COPYING: update from FSF 2008-10-12 17:54:42 +00:00
COPYING.LIB Update FSF address in GPL/LGPL boilerplate 2009-01-04 22:05:52 +00:00
Changelog Use qemu-project.org domain name 2013-10-11 09:34:56 -07:00
HACKING HACKING: Document vaddr type usage 2013-07-23 02:41:31 +02:00
LICENSE LICENSE: clarify 2013-08-12 09:15:12 -05:00
MAINTAINERS Merge remote-tracking branch 'remotes/kvm/uq/master' into staging 2014-06-20 19:25:18 +01:00
Makefile qapi: move event defines 2014-06-27 09:27:55 -04:00
Makefile.objs qapi script: add event support 2014-06-23 11:01:25 -04:00
Makefile.target build-sys: introduce install-prog macro to install&strip binaries and use it 2014-06-24 20:01:24 +04:00
README Use qemu-project.org domain name 2013-10-11 09:34:56 -07:00
VERSION Open 2.1 development tree 2014-04-17 20:39:32 +01:00
aio-posix.c aio: make aio_poll(ctx, true) block with no fds 2013-12-06 16:53:51 +01:00
aio-win32.c aio: make aio_poll(ctx, true) block with no fds 2013-12-06 16:53:51 +01:00
arch_init.c migration: catch unknown flags in ram_load 2014-06-16 04:55:27 +02:00
async.c aio: fix qemu_bh_schedule() bh->ctx race condition 2014-06-04 09:56:06 +02:00
balloon.c qapi event: convert BALLOON_CHANGE 2014-06-23 11:12:28 -04:00
block-migration.c block: fix wrong order in live block migration setup 2014-06-04 11:22:39 +02:00
block.c block: extend block-commit to accept a string for the backing file 2014-07-01 10:47:01 +02:00
blockdev-nbd.c nbd: Shutdown socket before closing. 2014-06-30 12:50:12 +02:00
blockdev.c block: extend block-commit to accept a string for the backing file 2014-07-01 10:47:01 +02:00
blockjob.c blockjob: Fix recent BLOCK_JOB_ERROR regression 2014-06-27 20:00:00 +02:00
bt-host.c sysemu: avoid proliferation of include/ subdirectories 2013-04-15 18:19:25 +02:00
bt-vhci.c sysemu: avoid proliferation of include/ subdirectories 2013-04-15 18:19:25 +02:00
configure configure: Enable out-of-tree iotests 2014-06-27 20:00:00 +02:00
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 Merge remote-tracking branch 'kwolf/for-anthony' into staging 2013-02-26 07:44:39 -06:00
coroutine-ucontext.c Fix warnings suppressors to honor --disable-werror 2013-04-17 10:28:04 -05:00
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: make CPU_INTERRUPT_RESET available on all targets 2014-05-13 13:21:51 +02:00
cpus.c qapi event: convert STOP 2014-06-23 11:01:25 -04:00
cputlb.c softmmu: introduce cpu_ldst.h 2014-06-05 16:10:33 +02:00
device-hotplug.c blockdev: Remove unused DriveInfo reference count 2014-06-16 17:23:19 +08:00
device_tree.c device_tree: qemu_fdt_setprop: Rename val_array arg 2013-12-20 01:58:12 +01:00
disas.c monitor: QEMU Monitor Instruction Disassembly Incorrect for PowerPC LE Mode 2014-06-16 13:24:26 +02:00
dma-helpers.c dma-helpers: avoid calling dma_bdrv_unmap() twice 2014-05-24 00:28:43 +04:00
dump.c dump: Make DumpState and endian conversion routines available for arch-specific dump code 2014-06-16 13:24:36 +02:00
exec.c exec: introduce target_words_bigendian() helper 2014-06-29 19:39:42 +03:00
gdbstub.c exec: Change cpu_breakpoint_{insert,remove{,_by_ref,_all}} argument 2014-03-13 19:20:48 +01:00
hmp-commands.hx Add the vhost-user netdev backend to the command line 2014-06-19 18:44:18 +03:00
hmp.c block: Add replaces argument to drive-mirror 2014-06-27 20:00:00 +02:00
hmp.h hmp: add info memdev 2014-06-19 18:44:21 +03:00
iohandler.c iohandler.c: Properly initialize sigaction struct 2014-05-24 00:07:29 +04:00
ioport.c portio: Allow to mark portio lists as coalesced MMIO flushing 2013-10-17 17:24:15 +02:00
iothread.c iothread: make IOThread struct definition public 2014-04-04 20:48:02 +02:00
kvm-all.c Merge remote-tracking branch 'remotes/kvm/uq/master' into staging 2014-06-20 19:25:18 +01:00
kvm-stub.c Add kvm_eventfds_enabled function 2014-06-19 16:41:54 +03:00
main-loop.c main-loop: Suppress "I/O thread spun" warnings for qtest 2014-03-13 21:36:50 +01:00
memory.c hostmem: add property to map memory with MAP_SHARED 2014-06-19 18:44:20 +03:00
memory_mapping.c cpu: Use QTAILQ for CPU list 2013-09-03 12:25:55 +02:00
migration-exec.c aio / timers: Untangle include files 2013-08-22 19:10:27 +02:00
migration-fd.c aio / timers: Untangle include files 2013-08-22 19:10:27 +02:00
migration-rdma.c rdma: bug fixes 2014-06-23 19:09:50 +02:00
migration-tcp.c Coverity: Fix failure path for qemu_accept in migration 2014-05-05 22:15:03 +02:00
migration-unix.c Coverity: Fix failure path for qemu_accept in migration 2014-05-05 22:15:03 +02:00
migration.c migration: catch unknown flags in ram_load 2014-06-16 04:55:27 +02:00
module-common.c module: implement module loading 2014-02-20 13:14:18 +01:00
monitor.c serial: poll the serial console with G_IO_HUP 2014-06-30 15:04:34 +02:00
nbd.c nbd: Handle NBD_OPT_LIST option. 2014-06-30 12:50:17 +02:00
numa.c numa: Reject configuration if not all node IDs are present 2014-06-29 18:59:42 +03:00
os-posix.c oslib-posix: Fix build on FreeBSD 2014-03-13 14:34:16 +00:00
os-win32.c util: Split out exec_dir from os_find_datadir 2014-02-20 13:12:54 +01:00
page_cache.c migration: Plug memory leak in migrate-set-cache-size command 2014-06-10 19:54:43 +04:00
qapi-schema.json mc146818rtc: add rtc-reset-reinjection QMP command 2014-06-29 18:59:35 +03:00
qdev-monitor.c qdev: Implement named GPIOs 2014-05-28 17:36:21 +02:00
qdict-test-data.txt Introduce QDict test data file 2009-09-04 09:37:34 -05:00
qemu-bridge-helper.c qemu-bridge-helper: Fix fd leak in main() 2014-06-27 10:39:10 +02:00
qemu-char.c char: report frontend open/closed state in 'query-chardev' 2014-06-27 09:34:00 -04:00
qemu-coroutine-io.c aio / timers: Untangle include files 2013-08-22 19:10:27 +02:00
qemu-coroutine-lock.c coroutine: remove qemu_co_queue_wait_insert_head 2013-12-02 17:11:49 +01:00
qemu-coroutine-sleep.c coroutine: add co_aio_sleep_ns() to allow sleep in block drivers 2013-10-30 12:22:09 +01:00
qemu-coroutine.c coroutine: add ./configure --disable-coroutine-pool 2013-09-12 10:12:48 +02:00
qemu-doc.texi qemu-img create: add 'nocow' option 2014-07-01 10:15:12 +02:00
qemu-file.c Make qemu_peek_buffer loop until it gets it's data 2014-05-05 22:15:03 +02:00
qemu-img-cmds.hx qemu-img: add -l for snapshot in convert 2013-12-04 15:19:00 +01:00
qemu-img.c cleanup QEMUOptionParameter 2014-06-16 17:23:21 +08:00
qemu-img.texi qemu-img create: add 'nocow' option 2014-07-01 10:15:12 +02:00
qemu-io-cmds.c qemu-io-cmds: Fixed typo in example for writev. 2014-03-19 09:39:41 +01:00
qemu-io.c trace: Multi-backend tracing 2014-06-09 15:43:40 +02:00
qemu-log.c qemu-log: default to stderr for logging output 2013-02-26 13:31:47 -06:00
qemu-nbd.c nbd: Shutdown socket before closing. 2014-06-30 12:50:12 +02:00
qemu-nbd.texi nbd: Miscellaneous typo fixes. 2014-05-24 00:07:29 +04:00
qemu-options-wrapper.h vl.c: In qemu -h output, only print options for the arch we are running as 2011-12-19 10:27:33 -06:00
qemu-options.h vl.c: Move option generation logic into a wrapper file 2011-12-19 10:27:33 -06:00
qemu-options.hx net: L2TPv3 transport 2014-06-27 10:39:10 +02:00
qemu-seccomp.c seccomp: add shmctl(), mlock(), and munlock() to the syscall whitelist 2014-04-25 14:52:03 -03:00
qemu-tech.texi qemu-tech.texi: update implemented xtensa features list 2012-11-29 13:00:52 -06:00
qemu-timer.c vl.c: remove init_clocks call from main 2014-05-09 20:57:32 +02:00
qemu.nsi nsis: Improved support for parallel installation of 32 and 64 bit code 2013-11-07 07:02:44 +01:00
qemu.sasl sasl: Avoid 'Could not find keytab file' in syslog 2014-03-15 13:54:18 +04:00
qmp-commands.hx block: extend block-commit to accept a string for the backing file 2014-07-01 10:47:01 +02:00
qmp.c qmp: add query-acpi-ospm-status command 2014-06-19 18:44:22 +03:00
qtest.c qtest: fix hex2nib for capital characters 2014-06-10 19:39:34 +04:00
rules.mak build-sys: introduce install-prog macro to install&strip binaries and use it 2014-06-24 20:01:24 +04:00
savevm.c savevm: check vmsd for migratability status 2014-06-25 23:54:57 +02:00
softmmu_template.h softmmu: move softmmu_template.h out of include/ 2014-06-05 16:10:33 +02:00
spice-qemu-char.c qemu-char: introduce qemu_chr_alloc 2014-06-23 11:12:28 -04:00
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 aio: Fix use-after-free in cancellation path 2014-05-28 14:28:46 +02:00
thunk.c exec: move include files to include/exec/ 2012-12-19 08:31:31 +01:00
tpm.c Use error_is_set() only when necessary 2014-02-17 11:57:23 -05:00
trace-events spapr_pci: Use XICS interrupt allocator and do not cache interrupts in PHB 2014-06-27 13:48:27 +02:00
translate-all.c Fix new typos (found by codespell) 2014-06-24 20:01:24 +04:00
translate-all.h translate-all: Change tb_check_watchpoint() argument to CPUState 2014-03-13 19:20:48 +01:00
user-exec.c softmmu: introduce cpu_ldst.h 2014-06-05 16:10:33 +02:00
version.rc Use qemu-project.org domain name 2013-10-11 09:34:56 -07:00
vl.c numa: Keep track of NUMA nodes present on the command-line 2014-06-29 18:59:41 +03:00
vmstate.c vmstate: Add preallocation for migrating arrays (VMS_ALLOC flag) 2014-06-27 13:48:27 +02:00
xbzrle.c xbzrle.c: Avoid undefined behaviour with signed arithmetic 2014-04-18 10:33:36 +04:00
xen-common-stub.c xen: factor out common functions 2014-05-07 16:16:43 +00:00
xen-common.c xen: factor out common functions 2014-05-07 16:16:43 +00:00
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: Handle machine opt max-ram-below-4g 2014-06-23 18:02:55 +03:00
xen-mapcache.c hw: move headers to include/ 2013-04-08 18:13:10 +02:00

README 

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

- QEMU team