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[Qemu-devel] [PATCH v3 2/2] scsi-bus: Convert DeviceClass init to realiz
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From: |
Fam Zheng |
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Subject: |
[Qemu-devel] [PATCH v3 2/2] scsi-bus: Convert DeviceClass init to realize |
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Date: |
Mon, 11 Aug 2014 16:45:18 +0800 |
Replace "init/destroy" with "realize/unrealize" in SCSIDeviceClass,
which has errp as a parameter. So all the implementations now use
error_setg instead of error_report for reporting error.
Also in lsi53c895a, report the error when initializing the if=scsi
devices, before dropping it, because in the callee, error_report is
changed to error_setg.
Signed-off-by: Fam Zheng <address@hidden>
---
hw/scsi/lsi53c895a.c | 2 ++
hw/scsi/scsi-bus.c | 69 ++++++++++++++++++++--------------------
hw/scsi/scsi-disk.c | 78 ++++++++++++++++++++++++----------------------
hw/scsi/scsi-generic.c | 37 +++++++++++-----------
include/hw/scsi/scsi.h | 7 +++--
tests/qemu-iotests/051.out | 4 +--
6 files changed, 99 insertions(+), 98 deletions(-)
diff --git a/hw/scsi/lsi53c895a.c b/hw/scsi/lsi53c895a.c
index 786d848..dbc98a0 100644
--- a/hw/scsi/lsi53c895a.c
+++ b/hw/scsi/lsi53c895a.c
@@ -19,6 +19,7 @@
#include "hw/pci/pci.h"
#include "hw/scsi/scsi.h"
#include "sysemu/dma.h"
+#include "qemu/error-report.h"
//#define DEBUG_LSI
//#define DEBUG_LSI_REG
@@ -2121,6 +2122,7 @@ static int lsi_scsi_init(PCIDevice *dev)
if (!d->hotplugged) {
scsi_bus_legacy_handle_cmdline(&s->bus, &err);
if (err != NULL) {
+ error_report("%s", error_get_pretty(err));
error_free(err);
return -1;
}
diff --git a/hw/scsi/scsi-bus.c b/hw/scsi/scsi-bus.c
index 4341754..da1276e 100644
--- a/hw/scsi/scsi-bus.c
+++ b/hw/scsi/scsi-bus.c
@@ -37,20 +37,19 @@ static const TypeInfo scsi_bus_info = {
};
static int next_scsi_bus;
-static int scsi_device_init(SCSIDevice *s)
+static void scsi_device_realize(SCSIDevice *s, Error **errp)
{
SCSIDeviceClass *sc = SCSI_DEVICE_GET_CLASS(s);
- if (sc->init) {
- return sc->init(s);
+ if (sc->realize) {
+ sc->realize(s, errp);
}
- return 0;
}
-static void scsi_device_destroy(SCSIDevice *s)
+static void scsi_device_unrealize(SCSIDevice *s, Error **errp)
{
SCSIDeviceClass *sc = SCSI_DEVICE_GET_CLASS(s);
- if (sc->destroy) {
- sc->destroy(s);
+ if (sc->unrealize) {
+ sc->unrealize(s, errp);
}
}
@@ -130,24 +129,24 @@ static void scsi_dma_restart_cb(void *opaque, int
running, RunState state)
}
}
-static int scsi_qdev_init(DeviceState *qdev)
+static void scsi_qdev_realize(DeviceState *qdev, Error **errp)
{
SCSIDevice *dev = SCSI_DEVICE(qdev);
SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, dev->qdev.parent_bus);
SCSIDevice *d;
- int rc = -1;
+ Error *local_err = NULL;
if (dev->channel > bus->info->max_channel) {
- error_report("bad scsi channel id: %d", dev->channel);
- goto err;
+ error_setg(errp, "bad scsi channel id: %d", dev->channel);
+ return;
}
if (dev->id != -1 && dev->id > bus->info->max_target) {
- error_report("bad scsi device id: %d", dev->id);
- goto err;
+ error_setg(errp, "bad scsi device id: %d", dev->id);
+ return;
}
if (dev->lun != -1 && dev->lun > bus->info->max_lun) {
- error_report("bad scsi device lun: %d", dev->lun);
- goto err;
+ error_setg(errp, "bad scsi device lun: %d", dev->lun);
+ return;
}
if (dev->id == -1) {
@@ -159,8 +158,8 @@ static int scsi_qdev_init(DeviceState *qdev)
d = scsi_device_find(bus, dev->channel, ++id, dev->lun);
} while (d && d->lun == dev->lun && id < bus->info->max_target);
if (d && d->lun == dev->lun) {
- error_report("no free target");
- goto err;
+ error_setg(errp, "no free target");
+ return;
}
dev->id = id;
} else if (dev->lun == -1) {
@@ -169,43 +168,41 @@ static int scsi_qdev_init(DeviceState *qdev)
d = scsi_device_find(bus, dev->channel, dev->id, ++lun);
} while (d && d->lun == lun && lun < bus->info->max_lun);
if (d && d->lun == lun) {
- error_report("no free lun");
- goto err;
+ error_setg(errp, "no free lun");
+ return;
}
dev->lun = lun;
} else {
d = scsi_device_find(bus, dev->channel, dev->id, dev->lun);
assert(d);
if (d->lun == dev->lun && dev != d) {
- error_report("lun already used by '%s'", d->qdev.id);
- goto err;
+ error_setg(errp, "lun already used by '%s'", d->qdev.id);
+ return;
}
}
QTAILQ_INIT(&dev->requests);
- rc = scsi_device_init(dev);
- if (rc == 0) {
- dev->vmsentry = qemu_add_vm_change_state_handler(scsi_dma_restart_cb,
- dev);
+ scsi_device_realize(dev, &local_err);
+ if (local_err) {
+ error_propagate(errp, local_err);
+ return;
}
+ dev->vmsentry = qemu_add_vm_change_state_handler(scsi_dma_restart_cb,
+ dev);
if (bus->info->hotplug) {
bus->info->hotplug(bus, dev);
}
-
-err:
- return rc;
}
-static int scsi_qdev_exit(DeviceState *qdev)
+static void scsi_qdev_unrealize(DeviceState *qdev, Error **errp)
{
SCSIDevice *dev = SCSI_DEVICE(qdev);
if (dev->vmsentry) {
qemu_del_vm_change_state_handler(dev->vmsentry);
}
- scsi_device_destroy(dev);
- return 0;
+ scsi_device_unrealize(dev, errp);
}
/* handle legacy '-drive if=scsi,...' cmd line args */
@@ -1964,11 +1961,11 @@ static void scsi_device_class_init(ObjectClass *klass,
void *data)
{
DeviceClass *k = DEVICE_CLASS(klass);
set_bit(DEVICE_CATEGORY_STORAGE, k->categories);
- k->bus_type = TYPE_SCSI_BUS;
- k->init = scsi_qdev_init;
- k->unplug = scsi_qdev_unplug;
- k->exit = scsi_qdev_exit;
- k->props = scsi_props;
+ k->bus_type = TYPE_SCSI_BUS;
+ k->realize = scsi_qdev_realize;
+ k->unplug = scsi_qdev_unplug;
+ k->unrealize = scsi_qdev_unrealize;
+ k->props = scsi_props;
}
static const TypeInfo scsi_device_type_info = {
diff --git a/hw/scsi/scsi-disk.c b/hw/scsi/scsi-disk.c
index 9010724..5e634b3 100644
--- a/hw/scsi/scsi-disk.c
+++ b/hw/scsi/scsi-disk.c
@@ -2151,7 +2151,7 @@ static void scsi_disk_reset(DeviceState *dev)
s->tray_open = 0;
}
-static void scsi_destroy(SCSIDevice *dev)
+static void scsi_unrealize(SCSIDevice *dev, Error **errp)
{
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev);
@@ -2234,29 +2234,28 @@ static void
scsi_disk_unit_attention_reported(SCSIDevice *dev)
}
}
-static int scsi_initfn(SCSIDevice *dev)
+static void scsi_realize(SCSIDevice *dev, Error **errp)
{
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev);
Error *err = NULL;
if (!s->qdev.conf.bs) {
- error_report("drive property not set");
- return -1;
+ error_setg(errp, "drive property not set");
+ return;
}
if (!(s->features & (1 << SCSI_DISK_F_REMOVABLE)) &&
!bdrv_is_inserted(s->qdev.conf.bs)) {
- error_report("Device needs media, but drive is empty");
- return -1;
+ error_setg(errp, "Device needs media, but drive is empty");
+ return;
}
blkconf_serial(&s->qdev.conf, &s->serial);
if (dev->type == TYPE_DISK) {
blkconf_geometry(&dev->conf, NULL, 65535, 255, 255, &err);
if (err) {
- error_report("%s", error_get_pretty(err));
- error_free(err);
- return -1;
+ error_propagate(errp, err);
+ return;
}
}
@@ -2273,8 +2272,8 @@ static int scsi_initfn(SCSIDevice *dev)
}
if (bdrv_is_sg(s->qdev.conf.bs)) {
- error_report("unwanted /dev/sg*");
- return -1;
+ error_setg(errp, "unwanted /dev/sg*");
+ return;
}
if ((s->features & (1 << SCSI_DISK_F_REMOVABLE)) &&
@@ -2287,10 +2286,9 @@ static int scsi_initfn(SCSIDevice *dev)
bdrv_iostatus_enable(s->qdev.conf.bs);
add_boot_device_path(s->qdev.conf.bootindex, &dev->qdev, NULL);
- return 0;
}
-static int scsi_hd_initfn(SCSIDevice *dev)
+static void scsi_hd_realize(SCSIDevice *dev, Error **errp)
{
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev);
s->qdev.blocksize = s->qdev.conf.logical_block_size;
@@ -2298,10 +2296,10 @@ static int scsi_hd_initfn(SCSIDevice *dev)
if (!s->product) {
s->product = g_strdup("QEMU HARDDISK");
}
- return scsi_initfn(&s->qdev);
+ scsi_realize(&s->qdev, errp);
}
-static int scsi_cd_initfn(SCSIDevice *dev)
+static void scsi_cd_realize(SCSIDevice *dev, Error **errp)
{
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev);
s->qdev.blocksize = 2048;
@@ -2310,22 +2308,26 @@ static int scsi_cd_initfn(SCSIDevice *dev)
if (!s->product) {
s->product = g_strdup("QEMU CD-ROM");
}
- return scsi_initfn(&s->qdev);
+ scsi_realize(&s->qdev, errp);
}
-static int scsi_disk_initfn(SCSIDevice *dev)
+static void scsi_disk_realize(SCSIDevice *dev, Error **errp)
{
DriveInfo *dinfo;
+ Error *local_err = NULL;
if (!dev->conf.bs) {
- return scsi_initfn(dev); /* ... and die there */
+ scsi_realize(dev, &local_err);
+ assert(local_err);
+ error_propagate(errp, local_err);
+ return;
}
dinfo = drive_get_by_blockdev(dev->conf.bs);
if (dinfo->media_cd) {
- return scsi_cd_initfn(dev);
+ scsi_cd_realize(dev, errp);
} else {
- return scsi_hd_initfn(dev);
+ scsi_hd_realize(dev, errp);
}
}
@@ -2457,35 +2459,35 @@ static int get_device_type(SCSIDiskState *s)
return 0;
}
-static int scsi_block_initfn(SCSIDevice *dev)
+static void scsi_block_realize(SCSIDevice *dev, Error **errp)
{
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev);
int sg_version;
int rc;
if (!s->qdev.conf.bs) {
- error_report("drive property not set");
- return -1;
+ error_setg(errp, "drive property not set");
+ return;
}
/* check we are using a driver managing SG_IO (version 3 and after) */
rc = bdrv_ioctl(s->qdev.conf.bs, SG_GET_VERSION_NUM, &sg_version);
if (rc < 0) {
- error_report("cannot get SG_IO version number: %s. "
+ error_setg(errp, "cannot get SG_IO version number: %s. "
"Is this a SCSI device?",
strerror(-rc));
- return -1;
+ return;
}
if (sg_version < 30000) {
- error_report("scsi generic interface too old");
- return -1;
+ error_setg(errp, "scsi generic interface too old");
+ return;
}
/* get device type from INQUIRY data */
rc = get_device_type(s);
if (rc < 0) {
- error_report("INQUIRY failed");
- return -1;
+ error_setg(errp, "INQUIRY failed");
+ return;
}
/* Make a guess for the block size, we'll fix it when the guest sends.
@@ -2503,7 +2505,7 @@ static int scsi_block_initfn(SCSIDevice *dev)
*/
s->features |= (1 << SCSI_DISK_F_NO_REMOVABLE_DEVOPS);
- return scsi_initfn(&s->qdev);
+ scsi_realize(&s->qdev, errp);
}
static SCSIRequest *scsi_block_new_request(SCSIDevice *d, uint32_t tag,
@@ -2599,8 +2601,8 @@ static void scsi_hd_class_initfn(ObjectClass *klass, void
*data)
DeviceClass *dc = DEVICE_CLASS(klass);
SCSIDeviceClass *sc = SCSI_DEVICE_CLASS(klass);
- sc->init = scsi_hd_initfn;
- sc->destroy = scsi_destroy;
+ sc->realize = scsi_hd_realize;
+ sc->unrealize = scsi_unrealize;
sc->alloc_req = scsi_new_request;
sc->unit_attention_reported = scsi_disk_unit_attention_reported;
dc->fw_name = "disk";
@@ -2630,8 +2632,8 @@ static void scsi_cd_class_initfn(ObjectClass *klass, void
*data)
DeviceClass *dc = DEVICE_CLASS(klass);
SCSIDeviceClass *sc = SCSI_DEVICE_CLASS(klass);
- sc->init = scsi_cd_initfn;
- sc->destroy = scsi_destroy;
+ sc->realize = scsi_cd_realize;
+ sc->unrealize = scsi_unrealize;
sc->alloc_req = scsi_new_request;
sc->unit_attention_reported = scsi_disk_unit_attention_reported;
dc->fw_name = "disk";
@@ -2660,8 +2662,8 @@ static void scsi_block_class_initfn(ObjectClass *klass,
void *data)
DeviceClass *dc = DEVICE_CLASS(klass);
SCSIDeviceClass *sc = SCSI_DEVICE_CLASS(klass);
- sc->init = scsi_block_initfn;
- sc->destroy = scsi_destroy;
+ sc->realize = scsi_block_realize;
+ sc->unrealize = scsi_unrealize;
sc->alloc_req = scsi_block_new_request;
dc->fw_name = "disk";
dc->desc = "SCSI block device passthrough";
@@ -2697,8 +2699,8 @@ static void scsi_disk_class_initfn(ObjectClass *klass,
void *data)
DeviceClass *dc = DEVICE_CLASS(klass);
SCSIDeviceClass *sc = SCSI_DEVICE_CLASS(klass);
- sc->init = scsi_disk_initfn;
- sc->destroy = scsi_destroy;
+ sc->realize = scsi_disk_realize;
+ sc->unrealize = scsi_unrealize;
sc->alloc_req = scsi_new_request;
sc->unit_attention_reported = scsi_disk_unit_attention_reported;
dc->fw_name = "disk";
diff --git a/hw/scsi/scsi-generic.c b/hw/scsi/scsi-generic.c
index 3733d2c..c34a0bc 100644
--- a/hw/scsi/scsi-generic.c
+++ b/hw/scsi/scsi-generic.c
@@ -386,49 +386,49 @@ static void scsi_generic_reset(DeviceState *dev)
scsi_device_purge_requests(s, SENSE_CODE(RESET));
}
-static void scsi_destroy(SCSIDevice *s)
+static void scsi_unrealize(SCSIDevice *s, Error **errp)
{
scsi_device_purge_requests(s, SENSE_CODE(NO_SENSE));
blockdev_mark_auto_del(s->conf.bs);
}
-static int scsi_generic_initfn(SCSIDevice *s)
+static void scsi_generic_realize(SCSIDevice *s, Error **errp)
{
int rc;
int sg_version;
struct sg_scsi_id scsiid;
if (!s->conf.bs) {
- error_report("drive property not set");
- return -1;
+ error_setg(errp, "drive property not set");
+ return;
}
if (bdrv_get_on_error(s->conf.bs, 0) != BLOCKDEV_ON_ERROR_ENOSPC) {
- error_report("Device doesn't support drive option werror");
- return -1;
+ error_setg(errp, "Device doesn't support drive option werror");
+ return;
}
if (bdrv_get_on_error(s->conf.bs, 1) != BLOCKDEV_ON_ERROR_REPORT) {
- error_report("Device doesn't support drive option rerror");
- return -1;
+ error_setg(errp, "Device doesn't support drive option rerror");
+ return;
}
/* check we are using a driver managing SG_IO (version 3 and after */
rc = bdrv_ioctl(s->conf.bs, SG_GET_VERSION_NUM, &sg_version);
if (rc < 0) {
- error_report("cannot get SG_IO version number: %s. "
- "Is this a SCSI device?",
- strerror(-rc));
- return -1;
+ error_setg(errp, "cannot get SG_IO version number: %s. "
+ "Is this a SCSI device?",
+ strerror(-rc));
+ return;
}
if (sg_version < 30000) {
- error_report("scsi generic interface too old");
- return -1;
+ error_setg(errp, "scsi generic interface too old");
+ return;
}
/* get LUN of the /dev/sg? */
if (bdrv_ioctl(s->conf.bs, SG_GET_SCSI_ID, &scsiid)) {
- error_report("SG_GET_SCSI_ID ioctl failed");
- return -1;
+ error_setg(errp, "SG_GET_SCSI_ID ioctl failed");
+ return;
}
/* define device state */
@@ -460,7 +460,6 @@ static int scsi_generic_initfn(SCSIDevice *s)
}
DPRINTF("block size %d\n", s->blocksize);
- return 0;
}
const SCSIReqOps scsi_generic_req_ops = {
@@ -495,8 +494,8 @@ static void scsi_generic_class_initfn(ObjectClass *klass,
void *data)
DeviceClass *dc = DEVICE_CLASS(klass);
SCSIDeviceClass *sc = SCSI_DEVICE_CLASS(klass);
- sc->init = scsi_generic_initfn;
- sc->destroy = scsi_destroy;
+ sc->realize = scsi_generic_realize;
+ sc->unrealize = scsi_unrealize;
sc->alloc_req = scsi_new_request;
dc->fw_name = "disk";
dc->desc = "pass through generic scsi device (/dev/sg*)";
diff --git a/include/hw/scsi/scsi.h b/include/hw/scsi/scsi.h
index 1adb549..d64ef24 100644
--- a/include/hw/scsi/scsi.h
+++ b/include/hw/scsi/scsi.h
@@ -72,10 +72,13 @@ struct SCSIRequest {
#define SCSI_DEVICE_GET_CLASS(obj) \
OBJECT_GET_CLASS(SCSIDeviceClass, (obj), TYPE_SCSI_DEVICE)
+typedef void (*SCSIDeviceRealize)(SCSIDevice *dev, Error **errp);
+typedef void (*SCSIDeviceUnrealize)(SCSIDevice *dev, Error **errp);
+
typedef struct SCSIDeviceClass {
DeviceClass parent_class;
- int (*init)(SCSIDevice *dev);
- void (*destroy)(SCSIDevice *s);
+ SCSIDeviceRealize realize;
+ SCSIDeviceUnrealize unrealize;
SCSIRequest *(*alloc_req)(SCSIDevice *s, uint32_t tag, uint32_t lun,
uint8_t *buf, void *hba_private);
void (*unit_attention_reported)(SCSIDevice *s);
diff --git a/tests/qemu-iotests/051.out b/tests/qemu-iotests/051.out
index d7b0f50..f6d9dc1 100644
--- a/tests/qemu-iotests/051.out
+++ b/tests/qemu-iotests/051.out
@@ -122,7 +122,7 @@ QEMU_PROG: -drive if=virtio: Device 'virtio-blk-pci' could
not be initialized
Testing: -drive if=scsi
QEMU X.Y.Z monitor - type 'help' for more information
-(qemu) QEMU_PROG: -drive if=scsi: Device needs media, but drive is empty
+(qemu) QEMU_PROG: Device needs media, but drive is empty
QEMU_PROG: Device initialization failed.
QEMU_PROG: Initialization of device lsi53c895a failed
@@ -149,13 +149,11 @@ QEMU_PROG: -device ide-hd,drive=disk: Device 'ide-hd'
could not be initialized
Testing: -drive if=none,id=disk -device lsi53c895a -device scsi-disk,drive=disk
QEMU X.Y.Z monitor - type 'help' for more information
(qemu) QEMU_PROG: -device scsi-disk,drive=disk: Device needs media, but drive
is empty
-QEMU_PROG: -device scsi-disk,drive=disk: Device initialization failed.
QEMU_PROG: -device scsi-disk,drive=disk: Device 'scsi-disk' could not be
initialized
Testing: -drive if=none,id=disk -device lsi53c895a -device scsi-hd,drive=disk
QEMU X.Y.Z monitor - type 'help' for more information
(qemu) QEMU_PROG: -device scsi-hd,drive=disk: Device needs media, but drive is
empty
-QEMU_PROG: -device scsi-hd,drive=disk: Device initialization failed.
QEMU_PROG: -device scsi-hd,drive=disk: Device 'scsi-hd' could not be
initialized
--
2.0.3