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[Qemu-devel] [PATCH v2 13/17] blockdev: Remove IF_* check for read-only
From: |
Kevin Wolf |
Subject: |
[Qemu-devel] [PATCH v2 13/17] blockdev: Remove IF_* check for read-only blockdev_init |
Date: |
Tue, 1 Oct 2013 15:20:15 +0200 |
IF_NONE allows read-only, which makes forbidding it in this place
for other types pretty much pointless.
Instead, make sure that all devices for which the check would have
errored out check in their init function that they don't get a read-only
BlockDriverState. This catches even cases where IF_NONE and -device is
used.
Signed-off-by: Kevin Wolf <address@hidden>
---
blockdev.c | 6 ------
hw/block/m25p80.c | 5 +++++
hw/block/xen_disk.c | 5 +++++
hw/sd/milkymist-memcard.c | 4 ++++
hw/sd/omap_mmc.c | 6 ++++++
hw/sd/pl181.c | 4 ++++
hw/sd/pxa2xx_mmci.c | 3 +++
hw/sd/sd.c | 5 +++++
hw/sd/sdhci.c | 3 +++
hw/sd/ssi-sd.c | 3 +++
tests/qemu-iotests/051.out | 5 ++++-
11 files changed, 42 insertions(+), 7 deletions(-)
diff --git a/blockdev.c b/blockdev.c
index 8b1a0c1..c465dff 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -532,12 +532,6 @@ static DriveInfo *blockdev_init(QDict *bs_opts,
if (media == MEDIA_CDROM) {
/* CDROM is fine for any interface, don't check. */
ro = 1;
- } else if (ro == 1) {
- if (type != IF_SCSI && type != IF_VIRTIO && type != IF_FLOPPY &&
- type != IF_NONE && type != IF_PFLASH) {
- error_report("read-only not supported by this bus type");
- goto err;
- }
}
bdrv_flags |= ro ? 0 : BDRV_O_RDWR;
diff --git a/hw/block/m25p80.c b/hw/block/m25p80.c
index 8c3b7f0..02a1544 100644
--- a/hw/block/m25p80.c
+++ b/hw/block/m25p80.c
@@ -624,6 +624,11 @@ static int m25p80_init(SSISlave *ss)
if (dinfo && dinfo->bdrv) {
DB_PRINT_L(0, "Binding to IF_MTD drive\n");
s->bdrv = dinfo->bdrv;
+ if (bdrv_is_read_only(s->bdrv)) {
+ fprintf(stderr, "Can't use a read-only drive");
+ return 1;
+ }
+
/* FIXME: Move to late init */
if (bdrv_read(s->bdrv, 0, s->storage, DIV_ROUND_UP(s->size,
BDRV_SECTOR_SIZE))) {
diff --git a/hw/block/xen_disk.c b/hw/block/xen_disk.c
index f35fc59..253a45f 100644
--- a/hw/block/xen_disk.c
+++ b/hw/block/xen_disk.c
@@ -829,6 +829,11 @@ static int blk_connect(struct XenDevice *xendev)
/* setup via qemu cmdline -> already setup for us */
xen_be_printf(&blkdev->xendev, 2, "get configured bdrv (cmdline
setup)\n");
blkdev->bs = blkdev->dinfo->bdrv;
+ if (bdrv_is_read_only(blkdev->bs) && !readonly) {
+ xen_be_printf(&blkdev->xendev, 0, "Unexpected read-only drive");
+ blkdev->bs = NULL;
+ return -1;
+ }
/* blkdev->bs is not create by us, we get a reference
* so we can bdrv_unref() unconditionally */
bdrv_ref(blkdev->bs);
diff --git a/hw/sd/milkymist-memcard.c b/hw/sd/milkymist-memcard.c
index 42613b3..d1168c9 100644
--- a/hw/sd/milkymist-memcard.c
+++ b/hw/sd/milkymist-memcard.c
@@ -255,6 +255,10 @@ static int milkymist_memcard_init(SysBusDevice *dev)
dinfo = drive_get_next(IF_SD);
s->card = sd_init(dinfo ? dinfo->bdrv : NULL, false);
+ if (s->card == NULL) {
+ return -1;
+ }
+
s->enabled = dinfo ? bdrv_is_inserted(dinfo->bdrv) : 0;
memory_region_init_io(&s->regs_region, OBJECT(s), &memcard_mmio_ops, s,
diff --git a/hw/sd/omap_mmc.c b/hw/sd/omap_mmc.c
index bf5d1fb..937a478 100644
--- a/hw/sd/omap_mmc.c
+++ b/hw/sd/omap_mmc.c
@@ -593,6 +593,9 @@ struct omap_mmc_s *omap_mmc_init(hwaddr base,
/* Instantiate the storage */
s->card = sd_init(bd, false);
+ if (s->card == NULL) {
+ exit(1);
+ }
return s;
}
@@ -618,6 +621,9 @@ struct omap_mmc_s *omap2_mmc_init(struct
omap_target_agent_s *ta,
/* Instantiate the storage */
s->card = sd_init(bd, false);
+ if (s->card == NULL) {
+ exit(1);
+ }
s->cdet = qemu_allocate_irqs(omap_mmc_cover_cb, s, 1)[0];
sd_set_cb(s->card, NULL, s->cdet);
diff --git a/hw/sd/pl181.c b/hw/sd/pl181.c
index 03875bf..c35896d 100644
--- a/hw/sd/pl181.c
+++ b/hw/sd/pl181.c
@@ -491,6 +491,10 @@ static int pl181_init(SysBusDevice *sbd)
qdev_init_gpio_out(dev, s->cardstatus, 2);
dinfo = drive_get_next(IF_SD);
s->card = sd_init(dinfo ? dinfo->bdrv : NULL, false);
+ if (s->card == NULL) {
+ return -1;
+ }
+
return 0;
}
diff --git a/hw/sd/pxa2xx_mmci.c b/hw/sd/pxa2xx_mmci.c
index 90c955f..b9d8b1a 100644
--- a/hw/sd/pxa2xx_mmci.c
+++ b/hw/sd/pxa2xx_mmci.c
@@ -539,6 +539,9 @@ PXA2xxMMCIState *pxa2xx_mmci_init(MemoryRegion *sysmem,
/* Instantiate the actual storage */
s->card = sd_init(bd, false);
+ if (s->card == NULL) {
+ exit(1);
+ }
register_savevm(NULL, "pxa2xx_mmci", 0, 0,
pxa2xx_mmci_save, pxa2xx_mmci_load, s);
diff --git a/hw/sd/sd.c b/hw/sd/sd.c
index 346d86f..7380f06 100644
--- a/hw/sd/sd.c
+++ b/hw/sd/sd.c
@@ -494,6 +494,11 @@ SDState *sd_init(BlockDriverState *bs, bool is_spi)
{
SDState *sd;
+ if (bdrv_is_read_only(bs)) {
+ fprintf(stderr, "sd_init: Cannot use read-only drive\n");
+ return NULL;
+ }
+
sd = (SDState *) g_malloc0(sizeof(SDState));
sd->buf = qemu_blockalign(bs, 512);
sd->spi = is_spi;
diff --git a/hw/sd/sdhci.c b/hw/sd/sdhci.c
index 1483e19..0906a1d 100644
--- a/hw/sd/sdhci.c
+++ b/hw/sd/sdhci.c
@@ -1166,6 +1166,9 @@ static void sdhci_initfn(Object *obj)
di = drive_get_next(IF_SD);
s->card = sd_init(di ? di->bdrv : NULL, false);
+ if (s->card == NULL) {
+ exit(1);
+ }
s->eject_cb = qemu_allocate_irqs(sdhci_insert_eject_cb, s, 1)[0];
s->ro_cb = qemu_allocate_irqs(sdhci_card_readonly_cb, s, 1)[0];
sd_set_cb(s->card, s->ro_cb, s->eject_cb);
diff --git a/hw/sd/ssi-sd.c b/hw/sd/ssi-sd.c
index d47e237..1bb56c4 100644
--- a/hw/sd/ssi-sd.c
+++ b/hw/sd/ssi-sd.c
@@ -246,6 +246,9 @@ static int ssi_sd_init(SSISlave *dev)
s->mode = SSI_SD_CMD;
dinfo = drive_get_next(IF_SD);
s->sd = sd_init(dinfo ? dinfo->bdrv : NULL, true);
+ if (s->sd == NULL) {
+ return -1;
+ }
register_savevm(&dev->qdev, "ssi_sd", -1, 1, ssi_sd_save, ssi_sd_load, s);
return 0;
}
diff --git a/tests/qemu-iotests/051.out b/tests/qemu-iotests/051.out
index 04bb236..95e3686 100644
--- a/tests/qemu-iotests/051.out
+++ b/tests/qemu-iotests/051.out
@@ -139,7 +139,10 @@ QEMU X.Y.Z monitor - type 'help' for more information
(qemu) q[K[Dqu[K[D[Dqui[K[D[D[Dquit[K
Testing: -drive file=TEST_DIR/t.qcow2,if=ide,readonly=on
-QEMU_PROG: -drive file=TEST_DIR/t.qcow2,if=ide,readonly=on: read-only not
supported by this bus type
+QEMU X.Y.Z monitor - type 'help' for more information
+(qemu) QEMU_PROG: Can't use a read-only drive
+QEMU_PROG: Device initialization failed.
+QEMU_PROG: Initialization of device ide-hd failed
Testing: -drive file=TEST_DIR/t.qcow2,if=virtio,readonly=on
QEMU X.Y.Z monitor - type 'help' for more information
--
1.8.1.4
- Re: [Qemu-devel] [PATCH v2 06/17] blockdev: Pass QDict to blockdev_init(), (continued)
- [Qemu-devel] [PATCH v2 05/17] blockdev: Separate ID generation from DriveInfo creation, Kevin Wolf, 2013/10/01
- [Qemu-devel] [PATCH v2 10/17] blockdev: Move parsing of 'boot' option to drive_init, Kevin Wolf, 2013/10/01
- [Qemu-devel] [PATCH v2 09/17] blockdev: Moving parsing of geometry options to drive_init, Kevin Wolf, 2013/10/01
- [Qemu-devel] [PATCH v2 11/17] blockdev: Move bus/unit/index processing to drive_init, Kevin Wolf, 2013/10/01
- [Qemu-devel] [PATCH v2 12/17] blockdev: Move virtio-blk device creation to drive_init, Kevin Wolf, 2013/10/01
- [Qemu-devel] [PATCH v2 13/17] blockdev: Remove IF_* check for read-only blockdev_init,
Kevin Wolf <=
- [Qemu-devel] [PATCH v2 03/17] blockdev: Introduce DriveInfo.enable_auto_del, Kevin Wolf, 2013/10/01
- [Qemu-devel] [PATCH v2 15/17] blockdev: Remove 'media' parameter from blockdev_init(), Kevin Wolf, 2013/10/01
- [Qemu-devel] [PATCH v2 16/17] blockdev: Don't disable COR automatically with blockdev-add, Kevin Wolf, 2013/10/01
- [Qemu-devel] [PATCH v2 17/17] blockdev: blockdev_init() error conversion, Kevin Wolf, 2013/10/01
- [Qemu-devel] [PATCH v2 08/17] blockdev: Move parsing of 'if' option to drive_init, Kevin Wolf, 2013/10/01