[v2] *: Constify VMState

[PATCH v2 01/71] migration: Make VMStateDescription.subsections const

Richard Henderson posted 71 patches 11 months, 1 week ago

Diff against v1
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Maintainers: Gerd Hoffmann <kraxel@redhat.com>, "Marc-André Lureau" <marcandre.lureau@redhat.com>, Stefan Berger <stefanb@linux.vnet.ibm.com>, Richard Henderson <richard.henderson@linaro.org>, Paolo Bonzini <pbonzini@redhat.com>, Luc Michel <luc@lmichel.fr>, Damien Hedde <damien.hedde@dahe.fr>, Juan Quintela <quintela@redhat.com>, Peter Xu <peterx@redhat.com>, Fabiano Rosas <farosas@suse.de>, Leonardo Bras <leobras@redhat.com>, "Michael S. Tsirkin" <mst@redhat.com>, Greg Kurz <groug@kaod.org>, Christian Schoenebeck <qemu_oss@crudebyte.com>, Igor Mammedov <imammedo@redhat.com>, Ani Sinha <anisinha@redhat.com>, Marcel Apfelbaum <marcel.apfelbaum@gmail.com>, "Philippe Mathieu-Daudé" <philmd@linaro.org>, Aurelien Jarno <aurelien@aurel32.net>, Alistair Francis <alistair@alistair23.me>, Peter Maydell <peter.maydell@linaro.org>, "Cédric Le Goater" <clg@kaod.org>, Andrew Jeffery <andrew@codeconstruct.com.au>, Joel Stanley <joel@jms.id.au>, Tyrone Ting <kfting@nuvoton.com>, Hao Wu <wuhaotsh@google.com>, "Edgar E. Iglesias" <edgar.iglesias@gmail.com>, Rob Herring <robh@kernel.org>, Jan Kiszka <jan.kiszka@web.de>, Eric Auger <eric.auger@redhat.com>, Shannon Zhao <shannon.zhaosl@gmail.com>, Laurent Vivier <laurent@vivier.eu>, Manos Pitsidianakis <manos.pitsidianakis@linaro.org>, Kevin Wolf <kwolf@redhat.com>, Hanna Reitz <hreitz@redhat.com>, John Snow <jsnow@redhat.com>, Raphael Norwitz <raphael.norwitz@nutanix.com>, Stefan Hajnoczi <stefanha@redhat.com>, Antony Pavlov <antonynpavlov@gmail.com>, Igor Mitsyanko <i.mitsyanko@gmail.com>, Alberto Garcia <berto@igalia.com>, Bin Meng <bin.meng@windriver.com>, Yoshinori Sato <ysato@users.sourceforge.jp>, Magnus Damm <magnus.damm@gmail.com>, Halil Pasic <pasic@linux.ibm.com>, Christian Borntraeger <borntraeger@linux.ibm.com>, Thomas Huth <thuth@redhat.com>, Palmer Dabbelt <palmer@dabbelt.com>, Nicholas Piggin <npiggin@gmail.com>, Daniel Henrique Barboza <danielhb413@gmail.com>, David Gibson <david@gibson.dropbear.id.au>, Harsh Prateek Bora <harshpb@linux.ibm.com>, Amit Shah <amit@kernel.org>, Helge Deller <deller@gmx.de>, Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>, "Hervé Poussineau" <hpoussin@reactos.org>, Aleksandar Rikalo <aleksandar.rikalo@syrmia.com>, BALATON Zoltan <balaton@eik.bme.hu>, Dmitry Fleytman <dmitry.fleytman@gmail.com>, "Maciej S. Szmigiero" <maciej.szmigiero@oracle.com>, Beniamino Galvani <b.galvani@gmail.com>, Strahinja Jankovic <strahinja.p.jankovic@gmail.com>, Corey Minyard <cminyard@mvista.com>, Titus Rwantare <titusr@google.com>, Eduardo Habkost <eduardo@habkost.net>, Jason Wang <jasowang@redhat.com>, David Woodhouse <dwmw2@infradead.org>, Paul Durrant <paul@xen.org>, Stefano Stabellini <sstabellini@kernel.org>, Anthony Perard <anthony.perard@citrix.com>, Song Gao <gaosong@loongson.cn>, Chris Wulff <crwulff@gmail.com>, Marek Vasut <marex@denx.de>, Jia Liu <proljc@gmail.com>, Weiwei Li <liwei1518@gmail.com>, Liu Zhiwei <zhiwei_liu@linux.alibaba.com>, David Hildenbrand <david@redhat.com>, "Frédéric Barrat" <fbarrat@linux.ibm.com>, Jiaxun Yang <jiaxun.yang@flygoat.com>, Niek Linnenbank <nieklinnenbank@gmail.com>, Jean-Christophe Dubois <jcd@tribudubois.net>, Andrey Smirnov <andrew.smirnov@gmail.com>, Subbaraya Sundeep <sundeep.lkml@gmail.com>, Francisco Iglesias <francisco.iglesias@amd.com>, Pavel Pisa <pisa@cmp.felk.cvut.cz>, Vikram Garhwal <fnu.vikram@xilinx.com>, Akihiko Odaki <akihiko.odaki@daynix.com>, Stefan Weil <sw@weilnetz.de>, Sriram Yagnaraman <sriram.yagnaraman@est.tech>, Sven Schnelle <svens@stackframe.org>, Stafford Horne <shorne@gmail.com>, Huacai Chen <chenhuacai@kernel.org>, Sunil V L <sunilvl@ventanamicro.com>, Anup Patel <anup.patel@wdc.com>, Eric Farman <farman@linux.ibm.com>, Ilya Leoshkevich <iii@linux.ibm.com>, Cornelia Huck <cohuck@redhat.com>, Fam Zheng <fam@euphon.net>, Hannes Reinecke <hare@suse.com>, Artyom Tarasenko <atar4qemu@gmail.com>, Alex Williamson <alex.williamson@redhat.com>, "Gonglei (Arei)" <arei.gonglei@huawei.com>, Radoslaw Biernacki <rad@semihalf.com>, Leif Lindholm <quic_llindhol@quicinc.com>, Marcin Juszkiewicz <marcin.juszkiewicz@linaro.org>, Pavel Dovgalyuk <pavel.dovgaluk@ispras.ru>, Alexander Graf <agraf@csgraf.de>, Michael Rolnik <mrolnik@gmail.com>

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[PATCH v2 01/71] migration: Make VMStateDescription.subsections const

Posted by Richard Henderson 11 months, 1 week ago

Allow the array of pointers to itself be const.
Propagate this through the copies of this field.

Tested-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 include/migration/vmstate.h |  2 +-
 migration/savevm.c          | 12 ++++++------
 migration/vmstate.c         | 14 ++++++++------
 3 files changed, 15 insertions(+), 13 deletions(-)

diff --git a/include/migration/vmstate.h b/include/migration/vmstate.h
index 9821918631..294d2d8486 100644
--- a/include/migration/vmstate.h
+++ b/include/migration/vmstate.h
@@ -209,7 +209,7 @@ struct VMStateDescription {
     bool (*dev_unplug_pending)(void *opaque);
 
     const VMStateField *fields;
-    const VMStateDescription **subsections;
+    const VMStateDescription * const *subsections;
 };
 
 extern const VMStateInfo vmstate_info_bool;
diff --git a/migration/savevm.c b/migration/savevm.c
index eec5503a42..39148636cc 100644
--- a/migration/savevm.c
+++ b/migration/savevm.c
@@ -551,11 +551,11 @@ static void dump_vmstate_vmsf(FILE *out_file, const VMStateField *field,
 }
 
 static void dump_vmstate_vmss(FILE *out_file,
-                              const VMStateDescription **subsection,
+                              const VMStateDescription *subsection,
                               int indent)
 {
-    if (*subsection != NULL) {
-        dump_vmstate_vmsd(out_file, *subsection, indent, true);
+    if (subsection != NULL) {
+        dump_vmstate_vmsd(out_file, subsection, indent, true);
     }
 }
 
@@ -597,7 +597,7 @@ static void dump_vmstate_vmsd(FILE *out_file,
         fprintf(out_file, "\n%*s]", indent, "");
     }
     if (vmsd->subsections != NULL) {
-        const VMStateDescription **subsection = vmsd->subsections;
+        const VMStateDescription * const *subsection = vmsd->subsections;
         bool first;
 
         fprintf(out_file, ",\n%*s\"Subsections\": [\n", indent, "");
@@ -606,7 +606,7 @@ static void dump_vmstate_vmsd(FILE *out_file,
             if (!first) {
                 fprintf(out_file, ",\n");
             }
-            dump_vmstate_vmss(out_file, subsection, indent + 2);
+            dump_vmstate_vmss(out_file, *subsection, indent + 2);
             subsection++;
             first = false;
         }
@@ -831,7 +831,7 @@ void unregister_savevm(VMStateIf *obj, const char *idstr, void *opaque)
 static void vmstate_check(const VMStateDescription *vmsd)
 {
     const VMStateField *field = vmsd->fields;
-    const VMStateDescription **subsection = vmsd->subsections;
+    const VMStateDescription * const *subsection = vmsd->subsections;
 
     if (field) {
         while (field->name) {
diff --git a/migration/vmstate.c b/migration/vmstate.c
index b7723a4187..ef26f26ccd 100644
--- a/migration/vmstate.c
+++ b/migration/vmstate.c
@@ -452,13 +452,15 @@ int vmstate_save_state_v(QEMUFile *f, const VMStateDescription *vmsd,
 }
 
 static const VMStateDescription *
-vmstate_get_subsection(const VMStateDescription **sub, char *idstr)
+vmstate_get_subsection(const VMStateDescription * const *sub,
+                       const char *idstr)
 {
-    while (sub && *sub) {
-        if (strcmp(idstr, (*sub)->name) == 0) {
-            return *sub;
+    if (sub) {
+        for (const VMStateDescription *s = *sub; s ; s = *++sub) {
+            if (strcmp(idstr, s->name) == 0) {
+                return s;
+            }
         }
-        sub++;
     }
     return NULL;
 }
@@ -517,7 +519,7 @@ static int vmstate_subsection_load(QEMUFile *f, const VMStateDescription *vmsd,
 static int vmstate_subsection_save(QEMUFile *f, const VMStateDescription *vmsd,
                                    void *opaque, JSONWriter *vmdesc)
 {
-    const VMStateDescription **sub = vmsd->subsections;
+    const VMStateDescription * const *sub = vmsd->subsections;
     bool vmdesc_has_subsections = false;
     int ret = 0;
 
-- 
2.34.1