diff options
| author | Kevin Wolf <kwolf@redhat.com> | 2016-06-23 15:12:35 +0200 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2016-07-13 13:32:27 +0200 |
| commit | f6166a06ffdb1cd5dd80adf2d82c35c3bda88239 (patch) | |
| tree | 36aa065e263e1adcdc7a923ae55528ea3224e91b /hw/block | |
| parent | 8daea510951dd309a44cea8de415c685c43851cf (diff) | |
block/qdev: Allow configuring WCE with qdev properties
As cache.writeback is a BlockBackend property and as such more related
to the guest device than the BlockDriverState, we already removed it
from the blockdev-add interface. This patch adds the new way to set it,
as a qdev property of the corresponding guest device.
For example: -drive if=none,file=test.img,node-name=img
-device ide-hd,drive=img,write-cache=off
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Diffstat (limited to 'hw/block')
| -rw-r--r-- | hw/block/block.c | 16 | ||||
| -rw-r--r-- | hw/block/nvme.c | 1 | ||||
| -rw-r--r-- | hw/block/virtio-blk.c | 1 |
3 files changed, 18 insertions, 0 deletions
diff --git a/hw/block/block.c b/hw/block/block.c index 97a59d4fa2..396b0d5de1 100644 --- a/hw/block/block.c +++ b/hw/block/block.c @@ -51,6 +51,22 @@ void blkconf_blocksizes(BlockConf *conf) } } +void blkconf_apply_backend_options(BlockConf *conf) +{ + BlockBackend *blk = conf->blk; + bool wce; + + switch (conf->wce) { + case ON_OFF_AUTO_ON: wce = true; break; + case ON_OFF_AUTO_OFF: wce = false; break; + case ON_OFF_AUTO_AUTO: wce = blk_enable_write_cache(blk); break; + default: + abort(); + } + + blk_set_enable_write_cache(blk, wce); +} + void blkconf_geometry(BlockConf *conf, int *ptrans, unsigned cyls_max, unsigned heads_max, unsigned secs_max, Error **errp) diff --git a/hw/block/nvme.c b/hw/block/nvme.c index 280d54d8eb..2ded2475ee 100644 --- a/hw/block/nvme.c +++ b/hw/block/nvme.c @@ -803,6 +803,7 @@ static int nvme_init(PCIDevice *pci_dev) return -1; } blkconf_blocksizes(&n->conf); + blkconf_apply_backend_options(&n->conf); pci_conf = pci_dev->config; pci_conf[PCI_INTERRUPT_PIN] = 1; diff --git a/hw/block/virtio-blk.c b/hw/block/virtio-blk.c index ae86e944ea..ecd8ea34b6 100644 --- a/hw/block/virtio-blk.c +++ b/hw/block/virtio-blk.c @@ -897,6 +897,7 @@ static void virtio_blk_device_realize(DeviceState *dev, Error **errp) } blkconf_serial(&conf->conf, &conf->serial); + blkconf_apply_backend_options(&conf->conf); s->original_wce = blk_enable_write_cache(conf->conf.blk); blkconf_geometry(&conf->conf, NULL, 65535, 255, 255, &err); if (err) { |