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 <kw...@redhat.com> Reported-by: Greg Kurz <gr...@kaod.org> Signed-off-by: Vladimir Sementsov-Ogievskiy <vsement...@virtuozzo.com> --- block/parallels.c | 30 +++++++++++++----------------- 1 file changed, 13 insertions(+), 17 deletions(-) diff --git a/block/parallels.c b/block/parallels.c index 7cd2714b69..c8ba23bbd5 100644 --- a/block/parallels.c +++ b/block/parallels.c @@ -613,8 +613,8 @@ static int coroutine_fn parallels_co_create_opts(const char *filename, QemuOpts *opts, Error **errp) { + ERRP_AUTO_PROPAGATE(); BlockdevCreateOptions *create_options = NULL; - Error *local_err = NULL; BlockDriverState *bs = NULL; QDict *qdict; Visitor *v; @@ -635,9 +635,8 @@ static int coroutine_fn parallels_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 done; } @@ -658,11 +657,10 @@ static int coroutine_fn parallels_co_create_opts(const char *filename, goto done; } - 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 done; } @@ -721,11 +719,11 @@ static int parallels_update_header(BlockDriverState *bs) static int parallels_open(BlockDriverState *bs, QDict *options, int flags, Error **errp) { + ERRP_AUTO_PROPAGATE(); BDRVParallelsState *s = bs->opaque; ParallelsHeader ph; int ret, size, i; QemuOpts *opts = NULL; - Error *local_err = NULL; char *buf; bs->file = bdrv_open_child(NULL, options, "file", bs, &child_file, @@ -813,13 +811,13 @@ static int parallels_open(BlockDriverState *bs, QDict *options, int flags, } } - opts = qemu_opts_create(¶llels_runtime_opts, NULL, 0, &local_err); - if (local_err != NULL) { + opts = qemu_opts_create(¶llels_runtime_opts, NULL, 0, errp); + if (*errp) { goto fail_options; } - qemu_opts_absorb_qdict(opts, options, &local_err); - if (local_err != NULL) { + qemu_opts_absorb_qdict(opts, options, errp); + if (*errp) { goto fail_options; } @@ -829,9 +827,9 @@ static int parallels_open(BlockDriverState *bs, QDict *options, int flags, buf = qemu_opt_get_del(opts, PARALLELS_OPT_PREALLOC_MODE); s->prealloc_mode = qapi_enum_parse(&prealloc_mode_lookup, buf, PRL_PREALLOC_MODE_FALLOCATE, - &local_err); + errp); g_free(buf); - if (local_err != NULL) { + if (*errp) { goto fail_options; } @@ -855,9 +853,8 @@ static int parallels_open(BlockDriverState *bs, QDict *options, int flags, error_setg(&s->migration_blocker, "The Parallels 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; } @@ -872,7 +869,6 @@ fail: return ret; fail_options: - error_propagate(errp, local_err); ret = -EINVAL; goto fail; } -- 2.21.0