@@ -18,9 +18,9 @@
typedef struct BlockConf {
BlockBackend *blk;
- uint16_t physical_block_size;
- uint16_t logical_block_size;
- uint16_t min_io_size;
+ uint32_t physical_block_size;
+ uint32_t logical_block_size;
+ uint32_t min_io_size;
uint32_t opt_io_size;
int32_t bootindex;
uint32_t discard_granularity;
@@ -51,9 +51,9 @@ static inline unsigned int get_physical_block_exp(BlockConf *conf)
_conf.logical_block_size), \
DEFINE_PROP_BLOCKSIZE("physical_block_size", _state, \
_conf.physical_block_size), \
- DEFINE_PROP_UINT16("min_io_size", _state, _conf.min_io_size, 0), \
- DEFINE_PROP_UINT32("opt_io_size", _state, _conf.opt_io_size, 0), \
- DEFINE_PROP_UINT32("discard_granularity", _state, \
+ DEFINE_PROP_SIZE32("min_io_size", _state, _conf.min_io_size, 0), \
+ DEFINE_PROP_SIZE32("opt_io_size", _state, _conf.opt_io_size, 0), \
+ DEFINE_PROP_SIZE32("discard_granularity", _state, \
_conf.discard_granularity, -1), \
DEFINE_PROP_ON_OFF_AUTO("write-cache", _state, _conf.wce, \
ON_OFF_AUTO_AUTO), \
@@ -200,7 +200,7 @@ extern const PropertyInfo qdev_prop_pcie_link_width;
#define DEFINE_PROP_SIZE32(_n, _s, _f, _d) \
DEFINE_PROP_UNSIGNED(_n, _s, _f, _d, qdev_prop_size32, uint32_t)
#define DEFINE_PROP_BLOCKSIZE(_n, _s, _f) \
- DEFINE_PROP_UNSIGNED(_n, _s, _f, 0, qdev_prop_blocksize, uint16_t)
+ DEFINE_PROP_UNSIGNED(_n, _s, _f, 0, qdev_prop_blocksize, uint32_t)
#define DEFINE_PROP_PCI_HOST_DEVADDR(_n, _s, _f) \
DEFINE_PROP(_n, _s, _f, qdev_prop_pci_host_devaddr, PCIHostDeviceAddress)
#define DEFINE_PROP_OFF_AUTO_PCIBAR(_n, _s, _f, _d) \
@@ -96,6 +96,17 @@ bool blkconf_blocksizes(BlockConf *conf, Error **errp)
return false;
}
+ /*
+ * all devices which support min_io_size (scsi and virtio-blk) expose it to
+ * the guest as a uint16_t in units of logical blocks
+ */
+ if (conf->min_io_size / conf->logical_block_size > UINT16_MAX) {
+ error_setg(errp,
+ "min_io_size must not exceed " stringify(UINT16_MAX)
+ " logical blocks");
+ return false;
+ }
+
if (!QEMU_IS_ALIGNED(conf->opt_io_size, conf->logical_block_size)) {
error_setg(errp,
"opt_io_size must be a multiple of logical_block_size");
@@ -782,7 +782,7 @@ static void set_blocksize(Object *obj, Visitor *v, const char *name,
{
DeviceState *dev = DEVICE(obj);
Property *prop = opaque;
- uint16_t *ptr = qdev_get_prop_ptr(dev, prop);
+ uint32_t *ptr = qdev_get_prop_ptr(dev, prop);
uint64_t value;
Error *local_err = NULL;
@@ -821,7 +821,7 @@ const PropertyInfo qdev_prop_blocksize = {
.name = "size",
.description = "A power of two between " MIN_BLOCK_SIZE_STR
" and " MAX_BLOCK_SIZE_STR,
- .get = get_uint16,
+ .get = get_uint32,
.set = set_blocksize,
.set_default_value = set_default_value_uint,
};
Convert all size-related properties in BlockConf to 32bit. This will allow to accomodate bigger block sizes (in a followup patch). This also allows to make them all accept size suffixes, either via DEFINE_PROP_BLOCKSIZE or via DEFINE_PROP_SIZE32. Also, since min_io_size is exposed to the guest by scsi and virtio-blk devices as an uint16_t in units of logical blocks, introduce an additional check in blkconf_blocksizes to prevent its silent truncation. Signed-off-by: Roman Kagan <rvkagan@yandex-team.ru> --- v6 -> v7: - split out into separate patch [Eric] - avoid overflow in min_io_size check [Eric] include/hw/block/block.h | 12 ++++++------ include/hw/qdev-properties.h | 2 +- hw/block/block.c | 11 +++++++++++ hw/core/qdev-properties.c | 4 ++-- 4 files changed, 20 insertions(+), 9 deletions(-)