| Message ID | 20191011160552.22907-87-vsementsov@virtuozzo.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | error: auto propagated local_err | expand |
On 10/11/19 12:05 PM, Vladimir Sementsov-Ogievskiy wrote: > 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 <kwolf@redhat.com> > Reported-by: Greg Kurz <groug@kaod.org> > Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Reviewed-by: Stefan Berger <stefanb@linux.ibm.com> > --- > hw/tpm/tpm_util.c | 7 +++---- > tpm.c | 7 +++---- > 2 files changed, 6 insertions(+), 8 deletions(-) > > diff --git a/hw/tpm/tpm_util.c b/hw/tpm/tpm_util.c > index 62b091f0c0..b0657bbbf2 100644 > --- a/hw/tpm/tpm_util.c > +++ b/hw/tpm/tpm_util.c > @@ -47,8 +47,8 @@ static void get_tpm(Object *obj, Visitor *v, const char *name, void *opaque, > static void set_tpm(Object *obj, Visitor *v, const char *name, void *opaque, > Error **errp) > { > + ERRP_AUTO_PROPAGATE(); > DeviceState *dev = DEVICE(obj); > - Error *local_err = NULL; > Property *prop = opaque; > TPMBackend *s, **be = qdev_get_prop_ptr(dev, prop); > char *str; > @@ -58,9 +58,8 @@ static void set_tpm(Object *obj, Visitor *v, const char *name, void *opaque, > return; > } > > - visit_type_str(v, name, &str, &local_err); > - if (local_err) { > - error_propagate(errp, local_err); > + visit_type_str(v, name, &str, errp); > + if (*errp) { > return; > } > > diff --git a/tpm.c b/tpm.c > index 9c9e20bbb7..359ebb7f68 100644 > --- a/tpm.c > +++ b/tpm.c > @@ -81,11 +81,11 @@ TPMBackend *qemu_find_tpm_be(const char *id) > > static int tpm_init_tpmdev(void *dummy, QemuOpts *opts, Error **errp) > { > + ERRP_AUTO_PROPAGATE(); > const char *value; > const char *id; > const TPMBackendClass *be; > TPMBackend *drv; > - Error *local_err = NULL; > int i; > > if (!QLIST_EMPTY(&tpm_backends)) { > @@ -116,9 +116,8 @@ static int tpm_init_tpmdev(void *dummy, QemuOpts *opts, Error **errp) > } > > /* validate backend specific opts */ > - qemu_opts_validate(opts, be->opts, &local_err); > - if (local_err) { > - error_propagate(errp, local_err); > + qemu_opts_validate(opts, be->opts, errp); > + if (*errp) { > return 1; > } >
diff --git a/hw/tpm/tpm_util.c b/hw/tpm/tpm_util.c index 62b091f0c0..b0657bbbf2 100644 --- a/hw/tpm/tpm_util.c +++ b/hw/tpm/tpm_util.c @@ -47,8 +47,8 @@ static void get_tpm(Object *obj, Visitor *v, const char *name, void *opaque, static void set_tpm(Object *obj, Visitor *v, const char *name, void *opaque, Error **errp) { + ERRP_AUTO_PROPAGATE(); DeviceState *dev = DEVICE(obj); - Error *local_err = NULL; Property *prop = opaque; TPMBackend *s, **be = qdev_get_prop_ptr(dev, prop); char *str; @@ -58,9 +58,8 @@ static void set_tpm(Object *obj, Visitor *v, const char *name, void *opaque, return; } - visit_type_str(v, name, &str, &local_err); - if (local_err) { - error_propagate(errp, local_err); + visit_type_str(v, name, &str, errp); + if (*errp) { return; } diff --git a/tpm.c b/tpm.c index 9c9e20bbb7..359ebb7f68 100644 --- a/tpm.c +++ b/tpm.c @@ -81,11 +81,11 @@ TPMBackend *qemu_find_tpm_be(const char *id) static int tpm_init_tpmdev(void *dummy, QemuOpts *opts, Error **errp) { + ERRP_AUTO_PROPAGATE(); const char *value; const char *id; const TPMBackendClass *be; TPMBackend *drv; - Error *local_err = NULL; int i; if (!QLIST_EMPTY(&tpm_backends)) { @@ -116,9 +116,8 @@ static int tpm_init_tpmdev(void *dummy, QemuOpts *opts, Error **errp) } /* validate backend specific opts */ - qemu_opts_validate(opts, be->opts, &local_err); - if (local_err) { - error_propagate(errp, local_err); + qemu_opts_validate(opts, be->opts, errp); + if (*errp) { return 1; }
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 <kwolf@redhat.com> Reported-by: Greg Kurz <groug@kaod.org> Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> --- hw/tpm/tpm_util.c | 7 +++---- tpm.c | 7 +++---- 2 files changed, 6 insertions(+), 8 deletions(-)