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[RFC v5 113/126] qcow: introduce ERRP_AUTO_PROPAGATE
From: |
Vladimir Sementsov-Ogievskiy |
Subject: |
[RFC v5 113/126] qcow: introduce ERRP_AUTO_PROPAGATE |
Date: |
Fri, 11 Oct 2019 19:05:39 +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>
---
block/qcow.c | 17 +++++++----------
1 file changed, 7 insertions(+), 10 deletions(-)
diff --git a/block/qcow.c b/block/qcow.c
index 5bdf72ba33..c58d3e36be 100644
--- a/block/qcow.c
+++ b/block/qcow.c
@@ -117,11 +117,11 @@ static QemuOptsList qcow_runtime_opts = {
static int qcow_open(BlockDriverState *bs, QDict *options, int flags,
Error **errp)
{
+ ERRP_AUTO_PROPAGATE();
BDRVQcowState *s = bs->opaque;
unsigned int len, i, shift;
int ret;
QCowHeader header;
- Error *local_err = NULL;
QCryptoBlockOpenOptions *crypto_opts = NULL;
unsigned int cflags = 0;
QDict *encryptopts = NULL;
@@ -314,9 +314,8 @@ static int qcow_open(BlockDriverState *bs, QDict *options,
int flags,
error_setg(&s->migration_blocker, "The qcow format used by node '%s' "
"does not support live migration",
bdrv_get_device_or_node_name(bs));
- ret = migrate_add_blocker(s->migration_blocker, &local_err);
- if (local_err) {
- error_propagate(errp, local_err);
+ ret = migrate_add_blocker(s->migration_blocker, errp);
+ if (*errp) {
error_free(s->migration_blocker);
goto fail;
}
@@ -942,12 +941,12 @@ exit:
static int coroutine_fn qcow_co_create_opts(const char *filename,
QemuOpts *opts, Error **errp)
{
+ ERRP_AUTO_PROPAGATE();
BlockdevCreateOptions *create_options = NULL;
BlockDriverState *bs = NULL;
QDict *qdict;
Visitor *v;
const char *val;
- Error *local_err = NULL;
int ret;
static const QDictRenames opt_renames[] = {
@@ -977,9 +976,8 @@ static int coroutine_fn qcow_co_create_opts(const char
*filename,
}
/* Create and open the file (protocol layer) */
- ret = bdrv_create_file(filename, opts, &local_err);
+ ret = bdrv_create_file(filename, opts, errp);
if (ret < 0) {
- error_propagate(errp, local_err);
goto fail;
}
@@ -1000,11 +998,10 @@ static int coroutine_fn qcow_co_create_opts(const char
*filename,
goto fail;
}
- visit_type_BlockdevCreateOptions(v, NULL, &create_options, &local_err);
+ visit_type_BlockdevCreateOptions(v, NULL, &create_options, errp);
visit_free(v);
- if (local_err) {
- error_propagate(errp, local_err);
+ if (*errp) {
ret = -EINVAL;
goto fail;
}
--
2.21.0
- Re: [RFC v5 025/126] scripts: add coccinelle script to use auto propagated errp, (continued)
[RFC v5 024/126] error: auto propagated local_err, Vladimir Sementsov-Ogievskiy, 2019/10/11
[RFC v5 103/126] GLUSTER: introduce ERRP_AUTO_PROPAGATE, Vladimir Sementsov-Ogievskiy, 2019/10/11
[RFC v5 115/126] vpc: introduce ERRP_AUTO_PROPAGATE, Vladimir Sementsov-Ogievskiy, 2019/10/11
[RFC v5 116/126] vvfat: introduce ERRP_AUTO_PROPAGATE, Vladimir Sementsov-Ogievskiy, 2019/10/11
[RFC v5 107/126] blklogwrites: introduce ERRP_AUTO_PROPAGATE, Vladimir Sementsov-Ogievskiy, 2019/10/11
[RFC v5 108/126] blkverify: introduce ERRP_AUTO_PROPAGATE, Vladimir Sementsov-Ogievskiy, 2019/10/11
[RFC v5 111/126] raw: introduce ERRP_AUTO_PROPAGATE, Vladimir Sementsov-Ogievskiy, 2019/10/11
[RFC v5 113/126] qcow: introduce ERRP_AUTO_PROPAGATE,
Vladimir Sementsov-Ogievskiy <=
[RFC v5 102/126] CURL: introduce ERRP_AUTO_PROPAGATE, Vladimir Sementsov-Ogievskiy, 2019/10/11
[RFC v5 100/126] NFS: introduce ERRP_AUTO_PROPAGATE, Vladimir Sementsov-Ogievskiy, 2019/10/11
[RFC v5 117/126] Replication: introduce ERRP_AUTO_PROPAGATE, Vladimir Sementsov-Ogievskiy, 2019/10/11
[RFC v5 110/126] qed: introduce ERRP_AUTO_PROPAGATE, Vladimir Sementsov-Ogievskiy, 2019/10/11
[RFC v5 112/126] qcow2: introduce ERRP_AUTO_PROPAGATE, Vladimir Sementsov-Ogievskiy, 2019/10/11
[RFC v5 101/126] SSH: introduce ERRP_AUTO_PROPAGATE, Vladimir Sementsov-Ogievskiy, 2019/10/11
[RFC v5 109/126] parallels: introduce ERRP_AUTO_PROPAGATE, Vladimir Sementsov-Ogievskiy, 2019/10/11
[RFC v5 104/126] NVMe Block Driver: introduce ERRP_AUTO_PROPAGATE, Vladimir Sementsov-Ogievskiy, 2019/10/11
[RFC v5 114/126] blkdebug: introduce ERRP_AUTO_PROPAGATE, Vladimir Sementsov-Ogievskiy, 2019/10/11
[RFC v5 106/126] Quorum: introduce ERRP_AUTO_PROPAGATE, Vladimir Sementsov-Ogievskiy, 2019/10/11