[Qemu-devel] [PATCH 04/11] usb-ccid: convert CCIDCardClass::init -> realize

[Philippe Mathieu-Daudé]

Signed-off-by: Philippe Mathieu-Daudé <address@hidden>
---
 hw/usb/ccid.h                 |  9 +++++--
 hw/usb/ccid-card-emulated.c   | 42 ++++++++++++++++---------------
 hw/usb/ccid-card-passthru.c   | 10 ++++----
 hw/usb/dev-smartcard-reader.c | 57 +++++++++++++++----------------------------
 4 files changed, 54 insertions(+), 64 deletions(-)

diff --git a/hw/usb/ccid.h b/hw/usb/ccid.h
index 1f070116d6..11056b91ee 100644
--- a/hw/usb/ccid.h
+++ b/hw/usb/ccid.h
@@ -28,20 +28,25 @@ typedef struct CCIDCardInfo CCIDCardInfo;
  * into the smartcard device (hw/ccid-card-*.c)
  */
 typedef struct CCIDCardClass {
+    /*< private >*/
     DeviceClass parent_class;
+    /*< public >*/
+
+    void (*realize)(CCIDCardState *card, Error **errp);
+    void (*unrealize)(CCIDCardState *card, Error **errp);
     const uint8_t *(*get_atr)(CCIDCardState *card, uint32_t *len);
     void (*apdu_from_guest)(CCIDCardState *card,
                             const uint8_t *apdu,
                             uint32_t len);
-    void (*exitfn)(CCIDCardState *card);
-    int (*initfn)(CCIDCardState *card);
 } CCIDCardClass;
 
 /*
  * state of the CCID Card device (i.e. hw/ccid-card-*.c)
  */
 struct CCIDCardState {
+    /*< private >*/
     DeviceState qdev;
+    /*< public >*/
     uint32_t    slot; /* For future use with multiple slot reader. */
 };
 
diff --git a/hw/usb/ccid-card-emulated.c b/hw/usb/ccid-card-emulated.c
index e646eb243b..8a512e73df 100644
--- a/hw/usb/ccid-card-emulated.c
+++ b/hw/usb/ccid-card-emulated.c
@@ -27,6 +27,7 @@
  */
 
 #include "qemu/osdep.h"
+#include "qapi/error.h"
 #include <eventt.h>
 #include <vevent.h>
 #include <vreader.h>
@@ -480,7 +481,7 @@ static uint32_t parse_enumeration(char *str,
     return ret;
 }
 
-static int emulated_initfn(CCIDCardState *base)
+static void emulated_realize(CCIDCardState *base, Error **errp)
 {
     EmulatedState *card = EMULATED_CCID_CARD(base);
     VCardEmulError ret;
@@ -495,7 +496,8 @@ static int emulated_initfn(CCIDCardState *base)
     card->reader = NULL;
     card->quit_apdu_thread = 0;
     if (init_event_notifier(card) < 0) {
-        return -1;
+        error_setg(errp, TYPE_EMULATED_CCID ": event notifier creation 
failed");
+        return;
     }
 
     card->backend = 0;
@@ -505,11 +507,12 @@ static int emulated_initfn(CCIDCardState *base)
     }
 
     if (card->backend == 0) {
-        printf("backend must be one of:\n");
+        error_setg(errp, TYPE_EMULATED_CCID ": no backend specified.");
+        printf("backend must be one of:\n"); /* TODO remove */
         for (ptable = backend_enum_table; ptable->name != NULL; ++ptable) {
             printf("%s\n", ptable->name);
         }
-        return -1;
+        return;
     }
 
     /* TODO: a passthru backened that works on local machine. third card 
type?*/
@@ -517,37 +520,36 @@ static int emulated_initfn(CCIDCardState *base)
         if (card->cert1 != NULL && card->cert2 != NULL && card->cert3 != NULL) 
{
             ret = emulated_initialize_vcard_from_certificates(card);
         } else {
-            printf("%s: you must provide all three certs for"
-                   " certificates backend\n", TYPE_EMULATED_CCID);
-            return -1;
+            error_setg(errp, TYPE_EMULATED_CCID ": you must provide all three "
+                             "certs for certificates backend");
+            return;
         }
     } else {
         if (card->backend != BACKEND_NSS_EMULATED) {
-            printf("%s: bad backend specified. The options are:\n%s (default),"
-                " %s.\n", TYPE_EMULATED_CCID, BACKEND_NSS_EMULATED_NAME,
-                BACKEND_CERTIFICATES_NAME);
-            return -1;
+            error_setg(errp, TYPE_EMULATED_CCID ": bad backend specified. "
+                             "The options are: %s (default), %s.",
+                       BACKEND_NSS_EMULATED_NAME, BACKEND_CERTIFICATES_NAME);
+            return;
         }
         if (card->cert1 != NULL || card->cert2 != NULL || card->cert3 != NULL) 
{
-            printf("%s: unexpected cert parameters to nss emulated backend\n",
-                   TYPE_EMULATED_CCID);
-            return -1;
+            error_setg(errp, TYPE_EMULATED_CCID ": unexpected cert parameters "
+                             "to nss emulated backend");
+            return;
         }
         /* default to mirroring the local hardware readers */
         ret = wrap_vcard_emul_init(NULL);
     }
     if (ret != VCARD_EMUL_OK) {
-        printf("%s: failed to initialize vcard\n", TYPE_EMULATED_CCID);
-        return -1;
+        error_setg(errp, TYPE_EMULATED_CCID ": failed to initialize vcard");
+        return;
     }
     qemu_thread_create(&card->event_thread_id, "ccid/event", event_thread,
                        card, QEMU_THREAD_JOINABLE);
     qemu_thread_create(&card->apdu_thread_id, "ccid/apdu", handle_apdu_thread,
                        card, QEMU_THREAD_JOINABLE);
-    return 0;
 }
 
-static void emulated_exitfn(CCIDCardState *base)
+static void emulated_unrealize(CCIDCardState *base, Error **errp)
 {
     EmulatedState *card = EMULATED_CCID_CARD(base);
     VEvent *vevent = vevent_new(VEVENT_LAST, NULL, NULL);
@@ -581,8 +583,8 @@ static void emulated_class_initfn(ObjectClass *klass, void 
*data)
     DeviceClass *dc = DEVICE_CLASS(klass);
     CCIDCardClass *cc = CCID_CARD_CLASS(klass);
 
-    cc->initfn = emulated_initfn;
-    cc->exitfn = emulated_exitfn;
+    cc->realize = emulated_realize;
+    cc->unrealize = emulated_unrealize;
     cc->get_atr = emulated_get_atr;
     cc->apdu_from_guest = emulated_apdu_from_guest;
     set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
diff --git a/hw/usb/ccid-card-passthru.c b/hw/usb/ccid-card-passthru.c
index 117711862e..844ad2f878 100644
--- a/hw/usb/ccid-card-passthru.c
+++ b/hw/usb/ccid-card-passthru.c
@@ -9,6 +9,7 @@
  */
 
 #include "qemu/osdep.h"
+#include "qapi/error.h"
 #include <cacard/vscard_common.h>
 #include "chardev/char-fe.h"
 #include "qemu/error-report.h"
@@ -337,7 +338,7 @@ static const uint8_t *passthru_get_atr(CCIDCardState *base, 
uint32_t *len)
     return card->atr;
 }
 
-static int passthru_initfn(CCIDCardState *base)
+static void passthru_realize(CCIDCardState *base, Error **errp)
 {
     PassthruState *card = PASSTHRU_CCID_CARD(base);
 
@@ -351,15 +352,14 @@ static int passthru_initfn(CCIDCardState *base)
             ccid_card_vscard_event, NULL, card, NULL, true);
         ccid_card_vscard_send_init(card);
     } else {
-        error_report("missing chardev");
-        return -1;
+        error_setg(errp, "missing chardev");
+        return;
     }
     card->debug = parse_debug_env("QEMU_CCID_PASSTHRU_DEBUG", D_VERBOSE,
                                   card->debug);
     assert(sizeof(DEFAULT_ATR) <= MAX_ATR_SIZE);
     memcpy(card->atr, DEFAULT_ATR, sizeof(DEFAULT_ATR));
     card->atr_length = sizeof(DEFAULT_ATR);
-    return 0;
 }
 
 static VMStateDescription passthru_vmstate = {
@@ -387,7 +387,7 @@ static void passthru_class_initfn(ObjectClass *klass, void 
*data)
     DeviceClass *dc = DEVICE_CLASS(klass);
     CCIDCardClass *cc = CCID_CARD_CLASS(klass);
 
-    cc->initfn = passthru_initfn;
+    cc->realize = passthru_realize;
     cc->get_atr = passthru_get_atr;
     cc->apdu_from_guest = passthru_apdu_from_guest;
     set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
diff --git a/hw/usb/dev-smartcard-reader.c b/hw/usb/dev-smartcard-reader.c
index e334d3be11..e36b190118 100644
--- a/hw/usb/dev-smartcard-reader.c
+++ b/hw/usb/dev-smartcard-reader.c
@@ -37,7 +37,6 @@
 #include "qemu/osdep.h"
 #include "qapi/error.h"
 #include "qemu-common.h"
-#include "qemu/error-report.h"
 #include "hw/usb.h"
 #include "hw/usb/desc.h"
 
@@ -500,26 +499,6 @@ static void ccid_card_apdu_from_guest(CCIDCardState *card,
     }
 }
 
-static void ccid_card_exitfn(CCIDCardState *card)
-{
-    CCIDCardClass *cc = CCID_CARD_GET_CLASS(card);
-
-    if (cc->exitfn) {
-        cc->exitfn(card);
-    }
-
-}
-
-static int ccid_card_initfn(CCIDCardState *card)
-{
-    CCIDCardClass *cc = CCID_CARD_GET_CLASS(card);
-
-    if (cc->initfn) {
-        return cc->initfn(card);
-    }
-    return 0;
-}
-
 static bool ccid_has_pending_answers(USBCCIDState *s)
 {
     return s->pending_answers_num > 0;
@@ -1281,41 +1260,45 @@ void ccid_card_card_inserted(CCIDCardState *card)
     ccid_on_slot_change(s, true);
 }
 
-static int ccid_card_exit(DeviceState *qdev)
+static void ccid_card_unrealize(DeviceState *qdev, Error **errp)
 {
     CCIDCardState *card = CCID_CARD(qdev);
+    CCIDCardClass *cc = CCID_CARD_GET_CLASS(card);
     USBDevice *dev = USB_DEVICE(qdev->parent_bus->parent);
     USBCCIDState *s = USB_CCID_DEV(dev);
 
     if (ccid_card_inserted(s)) {
         ccid_card_card_removed(card);
     }
-    ccid_card_exitfn(card);
+    if (cc->unrealize) {
+        cc->unrealize(card, errp);
+    }
     s->card = NULL;
-    return 0;
 }
 
-static int ccid_card_init(DeviceState *qdev)
+static void ccid_card_realize(DeviceState *qdev, Error **errp)
 {
     CCIDCardState *card = CCID_CARD(qdev);
+    CCIDCardClass *cc = CCID_CARD_GET_CLASS(card);
     USBDevice *dev = USB_DEVICE(qdev->parent_bus->parent);
     USBCCIDState *s = USB_CCID_DEV(dev);
-    int ret = 0;
 
     if (card->slot != 0) {
-        warn_report("usb-ccid supports one slot, can't add %d",
-                    card->slot);
-        return -1;
+        error_setg(errp, "usb-ccid supports one slot, can't add %d",
+                   card->slot);
+        return;
     }
     if (s->card != NULL) {
-        warn_report("usb-ccid card already full, not adding");
-        return -1;
+        error_setg(errp, "usb-ccid card already full, not adding");
+        return;
     }
-    ret = ccid_card_initfn(card);
-    if (ret == 0) {
-        s->card = card;
+    if (cc->realize) {
+        cc->realize(card, errp);
+        if (errp && *errp) {
+            return;
+        }
     }
-    return ret;
+    s->card = card;
 }
 
 static void ccid_realize(USBDevice *dev, Error **errp)
@@ -1477,8 +1460,8 @@ static void ccid_card_class_init(ObjectClass *klass, void 
*data)
 {
     DeviceClass *k = DEVICE_CLASS(klass);
     k->bus_type = TYPE_CCID_BUS;
-    k->init = ccid_card_init;
-    k->exit = ccid_card_exit;
+    k->realize = ccid_card_realize;
+    k->unrealize = ccid_card_unrealize;
     k->props = ccid_props;
 }
 
-- 
2.15.1