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>
---
backends/hostmem-file.c | 21 ++++++++------------
backends/hostmem-memfd.c | 18 ++++++++----------
backends/hostmem.c | 41 ++++++++++++++++++----------------------
3 files changed, 34 insertions(+), 46 deletions(-)
diff --git a/backends/hostmem-file.c b/backends/hostmem-file.c
index be64020746..4d03b9f33a 100644
--- a/backends/hostmem-file.c
+++ b/backends/hostmem-file.c
@@ -116,25 +116,22 @@ static void file_memory_backend_set_align(Object *o,
Visitor *v,
const char *name, void *opaque,
Error **errp)
{
+ ERRP_AUTO_PROPAGATE();
HostMemoryBackend *backend = MEMORY_BACKEND(o);
HostMemoryBackendFile *fb = MEMORY_BACKEND_FILE(o);
- Error *local_err = NULL;
uint64_t val;
if (host_memory_backend_mr_inited(backend)) {
- error_setg(&local_err, "cannot change property '%s' of %s",
+ error_setg(errp, "cannot change property '%s' of %s",
name, object_get_typename(o));
- goto out;
+ return;
}
- visit_type_size(v, name, &val, &local_err);
- if (local_err) {
- goto out;
+ visit_type_size(v, name, &val, errp);
+ if (*errp) {
+ return;
}
fb->align = val;
-
- out:
- error_propagate(errp, local_err);
}
static bool file_memory_backend_get_pmem(Object *o, Error **errp)
@@ -144,6 +141,7 @@ static bool file_memory_backend_get_pmem(Object *o, Error
**errp)
static void file_memory_backend_set_pmem(Object *o, bool value, Error **errp)
{
+ ERRP_AUTO_PROPAGATE();
HostMemoryBackend *backend = MEMORY_BACKEND(o);
HostMemoryBackendFile *fb = MEMORY_BACKEND_FILE(o);
@@ -156,13 +154,10 @@ static void file_memory_backend_set_pmem(Object *o, bool
value, Error **errp)
#ifndef CONFIG_LIBPMEM
if (value) {
- Error *local_err = NULL;
-
- error_setg(&local_err,
+ error_setg(errp,
"Lack of libpmem support while setting the 'pmem=on'"
" of %s. We can't ensure data persistence.",
object_get_typename(o));
- error_propagate(errp, local_err);
return;
}
#endif
diff --git a/backends/hostmem-memfd.c b/backends/hostmem-memfd.c
index 26070b425e..1f0677e5b4 100644
--- a/backends/hostmem-memfd.c
+++ b/backends/hostmem-memfd.c
@@ -77,27 +77,25 @@ static void
memfd_backend_set_hugetlbsize(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
{
+ ERRP_AUTO_PROPAGATE();
HostMemoryBackendMemfd *m = MEMORY_BACKEND_MEMFD(obj);
- Error *local_err = NULL;
uint64_t value;
if (host_memory_backend_mr_inited(MEMORY_BACKEND(obj))) {
- error_setg(&local_err, "cannot change property value");
- goto out;
+ error_setg(errp, "cannot change property value");
+ return;
}
- visit_type_size(v, name, &value, &local_err);
- if (local_err) {
- goto out;
+ visit_type_size(v, name, &value, errp);
+ if (*errp) {
+ return;
}
if (!value) {
- error_setg(&local_err, "Property '%s.%s' doesn't take value '%"
+ error_setg(errp, "Property '%s.%s' doesn't take value '%"
PRIu64 "'", object_get_typename(obj), name, value);
- goto out;
+ return;
}
m->hugetlbsize = value;
-out:
- error_propagate(errp, local_err);
}
static void
diff --git a/backends/hostmem.c b/backends/hostmem.c
index 6d333dc23c..7a3dd9d69b 100644
--- a/backends/hostmem.c
+++ b/backends/hostmem.c
@@ -53,29 +53,27 @@ static void
host_memory_backend_set_size(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
{
+ ERRP_AUTO_PROPAGATE();
HostMemoryBackend *backend = MEMORY_BACKEND(obj);
- Error *local_err = NULL;
uint64_t value;
if (host_memory_backend_mr_inited(backend)) {
- error_setg(&local_err, "cannot change property %s of %s ",
+ error_setg(errp, "cannot change property %s of %s ",
name, object_get_typename(obj));
- goto out;
+ return;
}
- visit_type_size(v, name, &value, &local_err);
- if (local_err) {
- goto out;
+ visit_type_size(v, name, &value, errp);
+ if (*errp) {
+ return;
}
if (!value) {
- error_setg(&local_err,
+ error_setg(errp,
"property '%s' of %s doesn't take value '%" PRIu64 "'",
name, object_get_typename(obj), value);
- goto out;
+ return;
}
backend->size = value;
-out:
- error_propagate(errp, local_err);
}
static void
@@ -221,7 +219,7 @@ static bool host_memory_backend_get_prealloc(Object *obj,
Error **errp)
static void host_memory_backend_set_prealloc(Object *obj, bool value,
Error **errp)
{
- Error *local_err = NULL;
+ ERRP_AUTO_PROPAGATE();
HostMemoryBackend *backend = MEMORY_BACKEND(obj);
MachineState *ms = MACHINE(qdev_get_machine());
@@ -243,9 +241,8 @@ static void host_memory_backend_set_prealloc(Object *obj,
bool value,
void *ptr = memory_region_get_ram_ptr(&backend->mr);
uint64_t sz = memory_region_size(&backend->mr);
- os_mem_prealloc(fd, ptr, sz, ms->smp.cpus, &local_err);
- if (local_err) {
- error_propagate(errp, local_err);
+ os_mem_prealloc(fd, ptr, sz, ms->smp.cpus, errp);
+ if (*errp) {
return;
}
backend->prealloc = true;
@@ -311,17 +308,17 @@ size_t host_memory_backend_pagesize(HostMemoryBackend
*memdev)
static void
host_memory_backend_memory_complete(UserCreatable *uc, Error **errp)
{
+ ERRP_AUTO_PROPAGATE();
HostMemoryBackend *backend = MEMORY_BACKEND(uc);
HostMemoryBackendClass *bc = MEMORY_BACKEND_GET_CLASS(uc);
MachineState *ms = MACHINE(qdev_get_machine());
- Error *local_err = NULL;
void *ptr;
uint64_t sz;
if (bc->alloc) {
- bc->alloc(backend, &local_err);
- if (local_err) {
- goto out;
+ bc->alloc(backend, errp);
+ if (*errp) {
+ return;
}
ptr = memory_region_get_ram_ptr(&backend->mr);
@@ -378,14 +375,12 @@ host_memory_backend_memory_complete(UserCreatable *uc,
Error **errp)
*/
if (backend->prealloc) {
os_mem_prealloc(memory_region_get_fd(&backend->mr), ptr, sz,
- ms->smp.cpus, &local_err);
- if (local_err) {
- goto out;
+ ms->smp.cpus, errp);
+ if (*errp) {
+ return;
}
}
}
-out:
- error_propagate(errp, local_err);
}
static bool
--
2.21.0
