October 2021 - Libguestfs - libguestfs List Archives

Re: [Libguestfs] libnbd | Failed pipeline for master | 70da51e5
by Richard W.M. Jones 04 Jan '22

04 Jan '22

Hi Martin, On Thu, Sep 02, 2021 at 04:05:56PM +0000, GitLab wrote: > GitLab > ✖ Pipeline #364204388 has failed! > > Project nbdkit / libnbd > Branch ● master > Commit ● 70da51e5 > interop: Link interop-nbd-server-tls with -lgnu... > Commit Author ● Richard W.M. Jones > > Pipeline #364204388 triggered by ● Richard W.M. Jones > had 1 failed job. > Failed jobs > ✖ builds x64-opensuse-tumbleweed > GitLab This is failing on a new test I added, but it's failing because of how a particular package is built in OpenSUSE. The new test is: https://gitlab.com/nbdkit/libnbd/-/commit/c833fa1226092fd51b1211fa195a2a3b7… which tries to test libnbd client with TLS enabled against nbd-server. nbd-server in OpenSUSE gives this error: Error: inetd mode requires syslog Exiting. which means it was compiled without --enable-syslog. I notice that the related test is skipped: SKIP: interop-nbd-server ======================== Test skipped based on ci/skipped_tests file SKIP interop-nbd-server (exit status: 77) The format of ci/skipped_tests is pretty odd. Is this patch OK? diff --git a/ci/skipped_tests b/ci/skipped_tests index e2de9330..c494b9eb 100644 --- a/ci/skipped_tests +++ b/ci/skipped_tests @@ -1,9 +1,9 @@ # Old nbd-server and built without syslog support, tests deadlock, old qemu-img version -^Ubuntu-18\.04$;interop/interop-nbd-server interop/list-exports-nbd-server interop/structured-read.sh -^openSUSE Leap-15;interop/interop-nbd-server interop/list-exports-nbd-server +^Ubuntu-18\.04$;interop/interop-nbd-server interop/interop-nbd-server-tls interop/list-exports-nbd-server interop/structured-read.sh +^openSUSE Leap-15;interop/interop-nbd-server interop/interop-nbd-server-tls interop/list-exports-nbd-server # Similar for Tumbleweed, except tests do not deadlock, only limit to version 2021* for now -^openSUSE Tumbleweed-2021;interop/interop-nbd-server interop/list-exports-nbd-server +^openSUSE Tumbleweed-2021;interop/interop-nbd-server interop/interop-nbd-server-tls interop/list-exports-nbd-server # Debian 10 has weird golang issues (old golang anyway) and old qemu-img ^Debian GNU/Linux-10;golang/run-tests.sh interop/structured-read.sh Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Read my programming and virtualization blog: http://rwmj.wordpress.com virt-top is 'top' for virtual machines. Tiny program with many powerful monitoring features, net stats, disk stats, logging, etc. http://people.redhat.com/~rjones/virt-top

2 8

[PATCH v4 0/5] qapi: Add feature flags to enum members
by Markus Armbruster 09 Nov '21

09 Nov '21

PATCH 1+2 add feature flags to enum members. Awkward due to an introspection design mistake; see PATCH 1 for details. PATCH 3+4 implement policy deprecated-input={reject,crash} for enum values. Policy deprecated-output=hide is not implemented, because we can't hide a value without hiding the entire member, which is almost certainly more than the requester of this policy bargained for. Perhaps we want a new policy deprecated-output=hide-or-else-crash to help us catch unwanted use of deprecated enum values. Perhaps we want deprecated-output=hide to behave that way together with deprecated-input=crash. Or even always. Thoughts? PATCH 5 puts the new feature flags to use. It's RFC because it makes sense only on top of Vladimir's deprecation of drive-backup. See its commit message for a reference. I prefer to commit new features together with a use outside tests/. PATCH 5 adds such a use, but it's RFC, because it depends on Vladimir's work. Perhaps another use pops up. I can delay this work in the hope of a use becoming ready, but the feature flags work I have in the pipeline will eventually force my hand. v4: * PATCH 1: Deprecate SchemaInfoEnum member @values. * PATCH 2: Doc tweak v3: * PATCH 1+2: Update qapi-code-gen.rst [Kevin, Eric] * PATCH 4: Commit message typo [Eric], doc update moved to PATCH 2 * PATCH 5: Doc comment FIXME resolved [Kevin] v2: * Rebased with straightforward conflicts. * PATCH 1-4: No longer RFC. * PATCH 1: "Since" information fixed [Eric]. Commit message updated to reflect feedback. * PATCH 2: Commit message amended to point out special feature flag 'deprecated' is ignored at this stage. * PATCH 4: Documentation updated. Commit message tweaked. Markus Armbruster (5): qapi: Enable enum member introspection to show more than name qapi: Add feature flags to enum members qapi: Move compat policy from QObject to generic visitor qapi: Implement deprecated-input={reject,crash} for enum values block: Deprecate transaction type drive-backup docs/about/deprecated.rst | 6 ++++ docs/devel/qapi-code-gen.rst | 29 ++++++++++++++----- qapi/compat.json | 3 ++ qapi/introspect.json | 28 ++++++++++++++++-- qapi/transaction.json | 6 +++- include/qapi/qobject-input-visitor.h | 4 --- include/qapi/qobject-output-visitor.h | 4 --- include/qapi/util.h | 6 +++- include/qapi/visitor-impl.h | 3 ++ include/qapi/visitor.h | 9 ++++++ qapi/qapi-visit-core.c | 27 +++++++++++++++-- qapi/qmp-dispatch.c | 4 +-- qapi/qobject-input-visitor.c | 14 +-------- qapi/qobject-output-visitor.c | 14 +-------- scripts/qapi/expr.py | 3 +- scripts/qapi/introspect.py | 19 +++++++++--- scripts/qapi/schema.py | 22 ++++++++++++-- scripts/qapi/types.py | 17 ++++++++++- tests/qapi-schema/doc-good.json | 5 +++- tests/qapi-schema/doc-good.out | 3 ++ tests/qapi-schema/doc-good.txt | 3 ++ .../qapi-schema/enum-dict-member-unknown.err | 2 +- tests/qapi-schema/qapi-schema-test.json | 3 +- tests/qapi-schema/qapi-schema-test.out | 1 + tests/qapi-schema/test-qapi.py | 1 + 25 files changed, 174 insertions(+), 62 deletions(-) -- 2.31.1

3 15

[PATCH libnbd v2 0/8] Enhance the vector library
by Nir Soffer 08 Nov '21

08 Nov '21

- Add vector benchmarks - Optimize vector append - Refine vector fields names - Clean up vector usage in crypto module I'm fine with relicensing these changes for for nbdkit. Changes in v2: - Benchmarks do not run by default (Richard) - Add "make bench" target to run the benchmarks v1: https://listman.redhat.com/archives/libguestfs/2021-October/msg00286.html Nir Soffer (8): common/utils: Add vector benchmarks common/utils: Do not run benchmarks by default common/utils/vector.c: Optimize vector append common/utils/vector: Rename `alloc` to `cap` common/utils/vector: Rename `size` to `len` lib/crypto.c: Simplify vector reserve lib/crypto.c: Don't use empty vector lib/crypto.c: Remove unneeded else Makefile.am | 5 ++ README | 4 ++ common/utils/Makefile.am | 5 +- common/utils/bench.h | 72 ++++++++++++++++++++ common/utils/test-vector.c | 58 +++++++++++++++- common/utils/vector.c | 14 +++- common/utils/vector.h | 40 +++++------ copy/file-ops.c | 14 ++-- copy/main.c | 2 +- copy/multi-thread-copying.c | 2 +- copy/nbd-ops.c | 20 +++--- copy/synch-copying.c | 2 +- fuse/nbdfuse.c | 4 +- fuse/operations.c | 16 ++--- generator/states-connect-socket-activation.c | 2 +- generator/states-newstyle-opt-meta-context.c | 8 +-- info/list.c | 8 +-- info/map.c | 12 ++-- info/show.c | 6 +- lib/crypto.c | 18 ++--- lib/handle.c | 4 +- lib/uri.c | 8 +-- 22 files changed, 236 insertions(+), 88 deletions(-) create mode 100644 common/utils/bench.h -- 2.31.1

3 12

[PATCH 0/9] Configurable policy for handling unstable interfaces
by Markus Armbruster 02 Nov '21

02 Nov '21

Option -compat lets you configure what to do when deprecated interfaces get used. This series extends this to unstable interfaces. Works the same way. Intended for testing users of the management interfaces. It is experimental. To make it possible, I replace the "x-" naming convention by special feature flag "unstable". See PATCH 1 for rationale. Based on my "[PATCH v4 0/5] qapi: Add feature flags to enum members" Based-on: Message-Id: <20211025042405.3762351-1-armbru(a)redhat.com> Markus Armbruster (9): qapi: New special feature flag "unstable" qapi: Mark unstable QMP parts with feature 'unstable' qapi: Eliminate QCO_NO_OPTIONS for a slight simplification qapi: Tools for sets of special feature flags in generated code qapi: Generalize struct member policy checking qapi: Generalize command policy checking qapi: Generalize enum member policy checking qapi: Factor out compat_policy_input_ok() qapi: Extend -compat to set policy for unstable interfaces docs/devel/qapi-code-gen.rst | 9 +- qapi/block-core.json | 123 +++++++++++++++++------- qapi/compat.json | 6 +- qapi/migration.json | 35 +++++-- qapi/misc.json | 6 +- qapi/qom.json | 11 ++- include/qapi/compat-policy.h | 7 ++ include/qapi/qmp/dispatch.h | 6 +- include/qapi/util.h | 8 +- include/qapi/visitor-impl.h | 6 +- include/qapi/visitor.h | 17 +++- monitor/misc.c | 7 +- qapi/qapi-forward-visitor.c | 16 +-- qapi/qapi-visit-core.c | 41 ++++---- qapi/qmp-dispatch.c | 57 ++++++++--- qapi/qmp-registry.c | 4 +- qapi/qobject-input-visitor.c | 22 ++--- qapi/qobject-output-visitor.c | 13 ++- storage-daemon/qemu-storage-daemon.c | 3 +- qapi/trace-events | 4 +- qemu-options.hx | 20 +++- scripts/qapi/commands.py | 12 +-- scripts/qapi/events.py | 10 +- scripts/qapi/gen.py | 13 +++ scripts/qapi/schema.py | 11 ++- scripts/qapi/types.py | 22 +++-- scripts/qapi/visit.py | 14 +-- tests/qapi-schema/qapi-schema-test.json | 7 +- tests/qapi-schema/qapi-schema-test.out | 5 + 29 files changed, 353 insertions(+), 162 deletions(-) -- 2.31.1

9 57

[PATCH libnbd v2 0/2] Go binding license and readme
by Nir Soffer 01 Nov '21

01 Nov '21

Relicense the tests to LGPL2+ like the rest of the library, and add a LICENSE and REAME.md files. Changes in v2: - Remove note about examples from LICENSE (Eric) - Relicense tests as LGPL2+ (Richard) v1: https://listman.redhat.com/archives/libguestfs/2021-October/msg00196.html Nir Soffer (2): golang: Changes test license to LPGL golang: Add README.md and LICENSE files golang/src/libguestfs.org/libnbd/LICENSE | 502 ++++++++++++++++++ golang/src/libguestfs.org/libnbd/README.md | 44 ++ .../libnbd/libnbd_010_load_test.go | 22 +- .../libnbd/libnbd_100_handle_test.go | 22 +- .../libnbd/libnbd_110_defaults_test.go | 22 +- .../libnbd_120_set_non_defaults_test.go | 22 +- .../libnbd/libnbd_200_connect_command_test.go | 22 +- .../libnbd/libnbd_210_opt_abort_test.go | 22 +- .../libnbd/libnbd_220_opt_list_test.go | 22 +- .../libnbd/libnbd_230_opt_info_test.go | 22 +- .../libnbd/libnbd_240_opt_list_meta_test.go | 22 +- .../libnbd/libnbd_300_get_size_test.go | 22 +- .../libnbd/libnbd_400_pread_test.go | 22 +- .../libnbd_405_pread_structured_test.go | 22 +- .../libnbd/libnbd_410_pwrite_test.go | 22 +- .../libnbd/libnbd_460_block_status_test.go | 22 +- .../libnbd/libnbd_500_aio_pread_test.go | 22 +- .../libnbd/libnbd_510_aio_pwrite_test.go | 22 +- .../libnbd/libnbd_590_aio_copy_test.go | 22 +- .../libnbd/libnbd_600_debug_callback_test.go | 22 +- .../libnbd/libnbd_610_error_test.go | 22 +- 21 files changed, 755 insertions(+), 209 deletions(-) create mode 100644 golang/src/libguestfs.org/libnbd/LICENSE create mode 100644 golang/src/libguestfs.org/libnbd/README.md -- 2.31.1

4 13

libnbd | Failed pipeline for master | 1af77750
by GitLab 01 Nov '21

01 Nov '21

Pipeline #399106888 has failed! Project: libnbd ( https://gitlab.com/nbdkit/libnbd ) Branch: master ( https://gitlab.com/nbdkit/libnbd/-/commits/master ) Commit: 1af77750 ( https://gitlab.com/nbdkit/libnbd/-/commit/1af7775015895a4081777877d7ddd1953… ) Commit Message: common/utils/test-vector.c: Remove unused local... Commit Author: Richard W_M_ Jones ( https://gitlab.com/rwmjones ) Pipeline #399106888 ( https://gitlab.com/nbdkit/libnbd/-/pipelines/399106888 ) triggered by Richard W_M_ Jones ( https://gitlab.com/rwmjones ) had 4 failed jobs. Job #1733422629 ( https://gitlab.com/nbdkit/libnbd/-/jobs/1733422629/raw ) Stage: builds Name: x86_64-freebsd-13 Job #1733422628 ( https://gitlab.com/nbdkit/libnbd/-/jobs/1733422628/raw ) Stage: builds Name: x86_64-freebsd-12 Job #1733422630 ( https://gitlab.com/nbdkit/libnbd/-/jobs/1733422630/raw ) Stage: builds Name: x86_64-freebsd-current Job #1733422631 ( https://gitlab.com/nbdkit/libnbd/-/jobs/1733422631/raw ) Stage: builds Name: x86_64-macos-11 -- You're receiving this email because of your account on gitlab.com.

2 1

libnbd | Failed pipeline for master | 7dcade08
by GitLab 31 Oct '21

31 Oct '21

Pipeline #399084262 has failed! Project: libnbd ( https://gitlab.com/nbdkit/libnbd ) Branch: master ( https://gitlab.com/nbdkit/libnbd/-/commits/master ) Commit: 7dcade08 ( https://gitlab.com/nbdkit/libnbd/-/commit/7dcade082cdee8d59a3c6a4357a3e23f6… ) Commit Message: lib/crypto.c: Remove unneeded else We return o... Commit Author: Nir Soffer Pipeline #399084262 ( https://gitlab.com/nbdkit/libnbd/-/pipelines/399084262 ) triggered by Nir Soffer ( https://gitlab.com/nirs ) had 22 failed jobs. Job #1733334812 ( https://gitlab.com/nbdkit/libnbd/-/jobs/1733334812/raw ) Stage: builds Name: x86_64-centos-stream-8 Job #1733334822 ( https://gitlab.com/nbdkit/libnbd/-/jobs/1733334822/raw ) Stage: builds Name: x86_64-ubuntu-1804 Job #1733334814 ( https://gitlab.com/nbdkit/libnbd/-/jobs/1733334814/raw ) Stage: builds Name: x86_64-debian-11 Job #1733334819 ( https://gitlab.com/nbdkit/libnbd/-/jobs/1733334819/raw ) Stage: builds Name: x86_64-fedora-rawhide-clang Job #1733334818 ( https://gitlab.com/nbdkit/libnbd/-/jobs/1733334818/raw ) Stage: builds Name: x86_64-fedora-rawhide Job #1733334813 ( https://gitlab.com/nbdkit/libnbd/-/jobs/1733334813/raw ) Stage: builds Name: x86_64-debian-10 Job #1733334820 ( https://gitlab.com/nbdkit/libnbd/-/jobs/1733334820/raw ) Stage: builds Name: x86_64-opensuse-leap-152 Job #1733334821 ( https://gitlab.com/nbdkit/libnbd/-/jobs/1733334821/raw ) Stage: builds Name: x86_64-opensuse-tumbleweed Job #1733334826 ( https://gitlab.com/nbdkit/libnbd/-/jobs/1733334826/raw ) Stage: builds Name: i686-debian-11 Job #1733334828 ( https://gitlab.com/nbdkit/libnbd/-/jobs/1733334828/raw ) Stage: builds Name: x86_64-freebsd-13 Job #1733334830 ( https://gitlab.com/nbdkit/libnbd/-/jobs/1733334830/raw ) Stage: builds Name: x86_64-macos-11 Job #1733334829 ( https://gitlab.com/nbdkit/libnbd/-/jobs/1733334829/raw ) Stage: builds Name: x86_64-freebsd-current Job #1733334827 ( https://gitlab.com/nbdkit/libnbd/-/jobs/1733334827/raw ) Stage: builds Name: x86_64-freebsd-12 Job #1733334825 ( https://gitlab.com/nbdkit/libnbd/-/jobs/1733334825/raw ) Stage: builds Name: i686-debian-10 Job #1733334824 ( https://gitlab.com/nbdkit/libnbd/-/jobs/1733334824/raw ) Stage: builds Name: x86_64-ubuntu-2004 Job #1733334811 ( https://gitlab.com/nbdkit/libnbd/-/jobs/1733334811/raw ) Stage: builds Name: x86_64-centos-8-clang Job #1733334815 ( https://gitlab.com/nbdkit/libnbd/-/jobs/1733334815/raw ) Stage: builds Name: x86_64-debian-sid Job #1733334808 ( https://gitlab.com/nbdkit/libnbd/-/jobs/1733334808/raw ) Stage: builds Name: x86_64-alpine-314 Job #1733334809 ( https://gitlab.com/nbdkit/libnbd/-/jobs/1733334809/raw ) Stage: builds Name: x86_64-alpine-edge Job #1733334810 ( https://gitlab.com/nbdkit/libnbd/-/jobs/1733334810/raw ) Stage: builds Name: x86_64-centos-8 Job #1733334817 ( https://gitlab.com/nbdkit/libnbd/-/jobs/1733334817/raw ) Stage: builds Name: x86_64-fedora-34 Job #1733334816 ( https://gitlab.com/nbdkit/libnbd/-/jobs/1733334816/raw ) Stage: builds Name: x86_64-fedora-33 -- You're receiving this email because of your account on gitlab.com.

1 0

[PATCH libnbd 0/7] Enhance the vector library
by Nir Soffer 30 Oct '21

30 Oct '21

- Optimize vector append - Refine vector fields names - Clean up vector usage in crypto module I'm fine with relicesing these change for for nbdkit. Nir Soffer (7): common/utils: Add vector benchmarks common/utils/vector.c: Optimize vector append common/utils/vector: Rename `alloc` to `cap` common/utils/vector: Rename `size` to `len` lib/crypto.c: Simplify vector reserve lib/crypto.c: Don't use empty vector lib/crypto.c: Remove unneeded else common/utils/Makefile.am | 2 +- common/utils/bench.h | 72 ++++++++++++++++++++ common/utils/test-vector.c | 51 +++++++++++++- common/utils/vector.c | 14 +++- common/utils/vector.h | 40 +++++------ copy/file-ops.c | 14 ++-- copy/main.c | 2 +- copy/multi-thread-copying.c | 2 +- copy/nbd-ops.c | 20 +++--- copy/synch-copying.c | 2 +- fuse/nbdfuse.c | 4 +- fuse/operations.c | 16 ++--- generator/states-connect-socket-activation.c | 2 +- generator/states-newstyle-opt-meta-context.c | 8 +-- info/list.c | 8 +-- info/map.c | 12 ++-- info/show.c | 6 +- lib/crypto.c | 18 ++--- lib/handle.c | 4 +- lib/uri.c | 8 +-- 20 files changed, 219 insertions(+), 86 deletions(-) create mode 100644 common/utils/bench.h -- 2.31.1

3 15

[PATCH libnbd] golang: Add README.md and LICENCE files
by Nir Soffer 30 Oct '21

30 Oct '21

Add README.md and LICENSE (copy of COPYING.LIB) file to the module directory. This helps people consuming this code from the tarball, which seems to be the only way to consume now. Preview in gitlab: https://gitlab.com/nirs/libnbd/-/tree/a6f4ff085022ed1e903518f13e0789f079673… Signed-off-by: Nir Soffer <nsoffer(a)redhat.com> --- golang/src/libguestfs.org/libnbd/LICENSE | 508 +++++++++++++++++++++ golang/src/libguestfs.org/libnbd/README.md | 44 ++ 2 files changed, 552 insertions(+) create mode 100644 golang/src/libguestfs.org/libnbd/LICENSE create mode 100644 golang/src/libguestfs.org/libnbd/README.md diff --git a/golang/src/libguestfs.org/libnbd/LICENSE b/golang/src/libguestfs.org/libnbd/LICENSE new file mode 100644 index 0000000..c7c3dcf --- /dev/null +++ b/golang/src/libguestfs.org/libnbd/LICENSE @@ -0,0 +1,508 @@ +This is the general license covering libnbd. The example code (in the +examples/ subdirectory) is distributed under a different license, see +examples/LICENSE-FOR-EXAMPLES. + +---------------------------------------------------------------------- + + GNU LESSER GENERAL PUBLIC LICENSE + Version 2.1, February 1999 + + Copyright (C) 1991, 1999 Free Software Foundation, Inc. + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + +[This is the first released version of the Lesser GPL. It also counts + as the successor of the GNU Library Public License, version 2, hence + the version number 2.1.] + + Preamble + + The licenses for most software are designed to take away your +freedom to share and change it. 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See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with this library; if not, write to the Free Software + Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + +Also add information on how to contact you by electronic and paper mail. + +You should also get your employer (if you work as a programmer) or your +school, if any, to sign a "copyright disclaimer" for the library, if +necessary. Here is a sample; alter the names: + + Yoyodyne, Inc., hereby disclaims all copyright interest in the + library `Frob' (a library for tweaking knobs) written by James Random Hacker. + + <signature of Ty Coon>, 1 April 1990 + Ty Coon, President of Vice + +That's all there is to it! diff --git a/golang/src/libguestfs.org/libnbd/README.md b/golang/src/libguestfs.org/libnbd/README.md new file mode 100644 index 0000000..be32e6a --- /dev/null +++ b/golang/src/libguestfs.org/libnbd/README.md @@ -0,0 +1,44 @@ +# Libnbd Go binding + +This module provides access to Network Block Device (NBD) servers from +the Go programming language, using the libnbd library. + +Please see the manual to learn how to use this module: +https://libguestfs.org/libnbd-golang.3.html + +This is part of libnbd, please check the project at: +https://gitlab.com/nbdkit/libnbd + +## How consume this module + +The Go binding cannot be consumed yet using the Go tools, but you +extract it from the tarball. + +1. Download a tarball + + wget https://download.libguestfs.org/libnbd/1.10-stable/libnbd-1.10.1.tar.gz + +2. Extract the go binding directory + + tar xvf libnbd-1.10.1.tar.gz \ + --directory pkg \ + --strip 3 \ + --exclude "*_test.go" \ + --exclude ".gitignore" \ + libnbd-1.10.1/golang/src/libguestfs.org/libnbd + +3. Edit your go mode file to use the local copy + + go mod edit -replace libguestfs.org/libnbd=./pkg/libguestfs.org/libnbd + +4. Install the libnbd development package + + dnf install libnbd-devel + + The package may be named differently on your distro. + +## License + +The software is copyright © Red Hat Inc. and licensed under the GNU +Lesser General Public License version 2 or above (LGPLv2+). See +the file `LICENSE` for details. -- 2.31.1

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[PATCH nbdkit v2 0/5] vddk: Implement parallel thread model
by Richard W.M. Jones 29 Oct '21

29 Oct '21

This version incorporates many of the changes suggested by Laszlo and Nir in their reviews (thanks). We now require VDDK 6.5 because it turned out that 6.0 is broken. There is a reliable way to detect VDDK 6.0 by the absence of VixDiskLib_Wait, so we now give an accurate error message if someone tries to use libvixDiskLib.so.6 and it's < 6.5. Although the 5th patch is large, I didn't split it into two parts, because that's hard work. About checking the return value from pthread_mutex_init and pthread_cond_init. I checked the implementation of these (in the only implementation we really care about, glibc), and my reading is these cannot realistically fail, especially if the attr parameter is NULL. https://sourceware.org/git/?p=glibc.git;a=blob;f=nptl/pthread_mutex_init.c;… https://sourceware.org/git/?p=glibc.git;a=blob;f=nptl/pthread_cond_init.c;h… cmd->error / cmd->completed have been combined into a single cmd->status enum. Laszlo raised a good point about abstraction (11c here: https://listman.redhat.com/archives/libguestfs/2021-October/msg00218.html) which I broadly agree with. I addressed it in a slightly different way. I think there was likely a problem with the old code in that it set cmd->error outside the mutex. I couldn't prove that this was definitely wrong, but it seemed either unsafe or a source of future problems. Instead the code now only updates the new cmd->status flag while holding the lock, which in turn solves the abstraction problem because there are now only a couple of places which update cmd->status. Rich.

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