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[RFC v5 083/126] QMP: introduce ERRP_AUTO_PROPAGATE
From: |
Vladimir Sementsov-Ogievskiy |
Subject: |
[RFC v5 083/126] QMP: introduce ERRP_AUTO_PROPAGATE |
Date: |
Fri, 11 Oct 2019 19:05:09 +0300 |
If we want to add some info to errp (by error_prepend() or
error_append_hint()), we must use the ERRP_AUTO_PROPAGATE macro.
Otherwise, this info will not be added when errp == &fatal_err
(the program will exit prior to the error_append_hint() or
error_prepend() call). Fix such cases.
If we want to check error after errp-function call, we need to
introduce local_err and than propagate it to errp. Instead, use
ERRP_AUTO_PROPAGATE macro, benefits are:
1. No need of explicit error_propagate call
2. No need of explicit local_err variable: use errp directly
3. ERRP_AUTO_PROPAGATE leaves errp as is if it's not NULL or
&error_fatel, this means that we don't break error_abort
(we'll abort on error_set, not on error_propagate)
This commit (together with its neighbors) was generated by
for f in $(git grep -l errp \*.[ch]); do \
spatch --sp-file scripts/coccinelle/auto-propagated-errp.cocci \
--macro-file scripts/cocci-macro-file.h --in-place --no-show-diff $f; \
done;
then fix a bit of compilation problems: coccinelle for some reason
leaves several
f() {
...
goto out;
...
out:
}
patterns, with "out:" at function end.
then
./python/commit-per-subsystem.py MAINTAINERS "$(< auto-msg)"
(auto-msg was a file with this commit message)
Still, for backporting it may be more comfortable to use only the first
command and then do one huge commit.
Reported-by: Kevin Wolf <address@hidden>
Reported-by: Greg Kurz <address@hidden>
Signed-off-by: Vladimir Sementsov-Ogievskiy <address@hidden>
---
monitor/qmp-cmds.c | 7 +++----
1 file changed, 3 insertions(+), 4 deletions(-)
diff --git a/monitor/qmp-cmds.c b/monitor/qmp-cmds.c
index c6faa3eaf0..2db3199a2e 100644
--- a/monitor/qmp-cmds.c
+++ b/monitor/qmp-cmds.c
@@ -126,9 +126,9 @@ void qmp_x_exit_preconfig(Error **errp)
void qmp_cont(Error **errp)
{
+ ERRP_AUTO_PROPAGATE();
BlockBackend *blk;
BlockJob *job;
- Error *local_err = NULL;
/* if there is a dump in background, we should wait until the dump
* finished */
@@ -161,9 +161,8 @@ void qmp_cont(Error **errp)
* If there are no inactive block nodes (e.g. because the VM was just
* paused rather than completing a migration), bdrv_inactivate_all() simply
* doesn't do anything. */
- bdrv_invalidate_cache_all(&local_err);
- if (local_err) {
- error_propagate(errp, local_err);
+ bdrv_invalidate_cache_all(errp);
+ if (*errp) {
return;
}
--
2.21.0
- [RFC v5 069/126] chardev: introduce ERRP_AUTO_PROPAGATE, (continued)
- [RFC v5 069/126] chardev: introduce ERRP_AUTO_PROPAGATE, Vladimir Sementsov-Ogievskiy, 2019/10/11
- [RFC v5 070/126] cmdline: introduce ERRP_AUTO_PROPAGATE, Vladimir Sementsov-Ogievskiy, 2019/10/11
- [RFC v5 074/126] Graphics: introduce ERRP_AUTO_PROPAGATE, Vladimir Sementsov-Ogievskiy, 2019/10/11
- [RFC v5 078/126] hostmem: introduce ERRP_AUTO_PROPAGATE, Vladimir Sementsov-Ogievskiy, 2019/10/11
- [RFC v5 051/126] vfio-ccw: introduce ERRP_AUTO_PROPAGATE, Vladimir Sementsov-Ogievskiy, 2019/10/11
- [RFC v5 079/126] cryptodev: introduce ERRP_AUTO_PROPAGATE, Vladimir Sementsov-Ogievskiy, 2019/10/11
- [RFC v5 071/126] Dump: introduce ERRP_AUTO_PROPAGATE, Vladimir Sementsov-Ogievskiy, 2019/10/11
- [RFC v5 031/126] xen: introduce ERRP_AUTO_PROPAGATE, Vladimir Sementsov-Ogievskiy, 2019/10/11
- [RFC v5 080/126] QAPI: introduce ERRP_AUTO_PROPAGATE, Vladimir Sementsov-Ogievskiy, 2019/10/11
- [RFC v5 083/126] QMP: introduce ERRP_AUTO_PROPAGATE,
Vladimir Sementsov-Ogievskiy <=
- [RFC v5 075/126] Main loop: introduce ERRP_AUTO_PROPAGATE, Vladimir Sementsov-Ogievskiy, 2019/10/11
- [RFC v5 072/126] Memory API: introduce ERRP_AUTO_PROPAGATE, Vladimir Sementsov-Ogievskiy, 2019/10/11
- [RFC v5 076/126] Human Monitor (HMP): introduce ERRP_AUTO_PROPAGATE, Vladimir Sementsov-Ogievskiy, 2019/10/11
- [RFC v5 077/126] net: introduce ERRP_AUTO_PROPAGATE, Vladimir Sementsov-Ogievskiy, 2019/10/11
- [RFC v5 055/126] virtio-blk: introduce ERRP_AUTO_PROPAGATE, Vladimir Sementsov-Ogievskiy, 2019/10/11
- [RFC v5 084/126] SLIRP: introduce ERRP_AUTO_PROPAGATE, Vladimir Sementsov-Ogievskiy, 2019/10/11
- [RFC v5 086/126] TPM: introduce ERRP_AUTO_PROPAGATE, Vladimir Sementsov-Ogievskiy, 2019/10/11