Vladimir Sementsov-Ogievskiy 64631f3681 block: drop BLK_PERM_GRAPH_MOD ... First, this permission never protected a node from being changed, as generic child-replacing functions don't check it. Second, it's a strange thing: it presents a permission of parent node to change its child. But generally, children are replaced by different mechanisms, like jobs or qmp commands, not by nodes. Graph-mod permission is hard to understand. All other permissions describe operations which done by parent node on its child: read, write, resize. Graph modification operations are something completely different. The only place where BLK_PERM_GRAPH_MOD is used as "perm" (not shared perm) is mirror_start_job, for s->target. Still modern code should use bdrv_freeze_backing_chain() to protect from graph modification, if we don't do it somewhere it may be considered as a bug. So, it's a bit risky to drop GRAPH_MOD, and analyzing of possible loss of protection is hard. But one day we should do it, let's do it now. One more bit of information is that locking the corresponding byte in file-posix doesn't make sense at all. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Message-Id: <20210902093754.2352-1-vsementsov@virtuozzo.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>		2022-01-14 12:03:16 +01:00
..
ci	block/file-posix: Simplify the XFS_IOC_DIOINFO handling	2022-01-12 14:09:04 +01:00
coccinelle	softmmu/memory: Pass ram_flags to memory_region_init_ram_shared_nomigrate()	2021-06-15 20:27:38 +02:00
codeconverter	scripts/codeconverter: Update to latest version	2020-09-18 14:12:32 -04:00
coverity-scan	block/file-posix: Simplify the XFS_IOC_DIOINFO handling	2022-01-12 14:09:04 +01:00
kvm	scripts/kvm/vmxcap: Use Python 3 interpreter and add pseudo-main()	2020-05-31 13:56:46 +02:00
modules	scripts/modules/module_block: Use Python 3 interpreter & add pseudo-main	2020-05-31 13:56:46 +02:00
oss-fuzz	fuzz: add an instrumentation filter	2021-09-01 07:33:13 -04:00
performance	scripts/performance: Add dissect.py script	2020-07-14 22:22:22 +02:00
qapi	qapi: Extend -compat to set policy for unstable interfaces	2021-10-29 21:28:01 +02:00
qemu-guest-agent	qemu-guest-agent: freeze-hook to ignore dpkg files as well	2018-08-23 18:46:25 +02:00
qemugdb	scripts/gdb: implement 'qemu bt'	2021-01-12 12:38:03 +01:00
qmp	scripts/qmp-shell: add redirection shim	2021-06-18 16:10:07 -04:00
simplebench	simplebench: Fix Python syntax error (reported by LGTM)	2022-01-10 18:23:10 -05:00
tracetool	scripts/tracetool: Replace the word 'whitelist'	2021-03-09 22:14:26 +01:00
analyse-9p-simpletrace.py	drop "from __future__ import print_function"	2020-02-07 15:15:16 +01:00
analyse-locks-simpletrace.py	drop "from __future__ import print_function"	2020-02-07 15:15:16 +01:00
analyze-inclusions	Move target-* CPU file into a target/ folder	2016-12-20 21:52:12 +01:00
analyze-migration.py	analyze-migration.py: fix extract contents ('-x') errors	2021-10-23 20:28:56 +02:00
archive-source.sh	build-sys: add meson submodule	2020-08-21 06:30:06 -04:00
block-coroutine-wrapper.py	block-coroutine-wrapper.py: support BlockBackend first argument	2021-10-15 15:51:33 -05:00
check_sparse.py	meson: move sparse detection to Meson and rewrite check_sparse.py	2020-10-04 18:36:23 +02:00
checkpatch.pl	checkpatch: Do not allow deprecated g_memdup()	2021-12-17 11:57:35 +01:00
clean-header-guards.pl	scripts/: fix some comment spelling errors	2020-09-17 20:37:55 +02:00
clean-includes	meson: rename included C source files to .c.inc	2020-08-21 06:18:30 -04:00
cleanup-trace-events.pl	scripts/cleanup-trace-events: Emit files in alphabetical order	2020-09-09 17:17:00 +01:00
cocci-macro-file.h	compiler.h: remove QEMU_GNUC_PREREQ	2020-12-15 12:53:15 -05:00
cpu-x86-uarch-abi.py	scripts: helper to generate x86_64 CPU ABI compat info	2021-06-17 14:11:06 -04:00
decodetree.py	decodetree: Extend argument set syntax to allow types	2021-05-01 11:45:35 -07:00
device-crash-test	scripts/device-crash-test: Use a QMP timeout	2021-11-22 18:41:21 -05:00
disas-objdump.pl	scripts: Switch to more portable Perl shebang	2017-05-10 10:19:24 +03:00
dump-guest-memory.py	drop "from __future__ import print_function"	2020-02-07 15:15:16 +01:00
entitlement.sh	scripts/entitlement.sh: Use backward-compatible cp flags	2021-11-30 22:25:58 +01:00
extract-vsssdk-headers	Add a script to extract VSS SDK headers on POSIX system	2013-09-09 14:17:56 -05:00
feature_to_c.sh	meson: cpu-emu	2020-08-21 06:30:39 -04:00
fix-multiline-comments.sh	docs: move CODING_STYLE into the developer documentation	2021-02-24 11:05:21 +00:00
gensyscalls.sh	Hexagon (linux-user/hexagon) Linux user emulation	2021-02-18 07:48:22 -08:00
get_maintainer.pl	get_maintainer: update repo URL to GitLab	2021-02-09 20:53:56 +00:00
git-submodule.sh	configure: replace --enable/disable-git-update with --with-git-submodules	2021-01-29 17:07:53 +00:00
git.orderfile	scripts/git.orderfile: Keep files with .inc extension sorted	2020-12-15 12:53:16 -05:00
hxtool	meson: generate hxtool files	2020-08-21 06:30:14 -04:00
hxtool-conv.pl	scripts/hxtool-conv: Archive script used in qemu-options.hx conversion	2020-03-06 10:05:24 +00:00
kernel-doc	scripts/kernel-doc: strip QEMU_ from function definitions	2021-03-24 14:24:40 +00:00
make-config-poison.sh	configure, meson: move config-poison.h to meson	2022-01-12 14:09:06 +01:00
make-release	roms/edk2: Only initialize required submodules	2021-10-20 16:26:19 -07:00
meson-buildoptions.py	configure: parse --enable/--disable-strip automatically, flip default	2022-01-12 14:09:06 +01:00
meson-buildoptions.sh	configure: parse --enable/--disable-strip automatically, flip default	2022-01-12 14:09:06 +01:00
meson.build	trace: move configuration from configure to Meson	2021-10-14 09:50:56 +02:00
minikconf.py	meson: infrastructure for building emulators	2020-08-21 06:30:17 -04:00
modinfo-collect.py	scripts: teach modinfo to skip non-C sources	2021-12-21 10:50:21 +04:00
modinfo-generate.py	modules: check if all dependencies can be satisfied	2021-07-09 18:20:27 +02:00
mtest2make.py	build: use "meson test" as the test harness	2021-12-23 10:06:19 +01:00
nsis.py	meson: Fix argument for makensis (build regression)	2020-11-18 09:28:55 +01:00
qapi-gen.py	qapi: move generator entrypoint into package	2020-10-10 11:37:47 +02:00
qemu-binfmt-conf.sh	qemu-binfmt-conf.sh: fix -F option	2022-01-06 11:40:40 +01:00
qemu-gdb.py	scripts/gdb: implement 'qemu bt'	2021-01-12 12:38:03 +01:00
qemu-trace-stap	qemu-trace-stap: changing SYSTEMTAP_TAPSET considered harmful.	2021-07-12 17:37:06 +01:00
qemu-version.sh	build-sys: fix git version from -version	2020-10-12 11:50:23 -04:00
refresh-pxe-roms.sh	roms: rewrite scripts/refresh-pxe-roms.sh	2013-09-30 09:44:35 +02:00
render_block_graph.py	block: drop BLK_PERM_GRAPH_MOD	2022-01-14 12:03:16 +01:00
replay-dump.py	nomaintainer: Fix Lesser GPL version number	2020-11-15 17:04:40 +01:00
shaderinclude.pl	scripts: Switch to more portable Perl shebang	2017-05-10 10:19:24 +03:00
signrom.py	drop "from __future__ import print_function"	2020-02-07 15:15:16 +01:00
simpletrace.py	docs: fix references to docs/devel/tracing.rst	2021-06-02 06:51:09 +02:00
switch-timer-api	scripts: Switch to more portable Perl shebang	2017-05-10 10:19:24 +03:00
test-driver.py	mtest2make: hide output of successful tests	2020-09-08 07:17:09 +02:00
tracetool.py	tracetool: add output filename command-line argument	2021-01-04 14:24:58 +00:00
u2f-setup-gen.py	scripts: Add u2f-setup-gen script	2020-08-31 08:23:39 +02:00
undefsym.py	build: fix macOS --enable-modules build	2020-10-22 11:53:52 -04:00
update-linux-headers.sh	headers: Add udmabuf.h	2021-05-27 12:06:37 +02:00
update-mips-syscall-args.sh	linux-user, mips: update syscall-args-o32.c.inc to Linux v5.13	2021-07-13 13:59:59 +02:00
update-syscalltbl.sh	linux-user, scripts: add a script to update syscall.tbl	2020-03-20 16:02:00 +01:00
userfaultfd-wrlat.py	migration: introduce 'userfaultfd-wrlat.py' script	2021-02-08 11:19:51 +00:00
vmstate-static-checker.py	drop "from __future__ import print_function"	2020-02-07 15:15:16 +01:00