From b64ec4e4ade581d662753cdeb0d7e0e27aafbf81 Mon Sep 17 00:00:00 2001 From: Fam Zheng Date: Wed, 29 May 2013 19:35:40 +0800 Subject: block: add block driver read only whitelist We may want to include a driver in the whitelist for read only tasks such as diagnosing or exporting guest data (with libguestfs as a good example). This patch introduces a readonly whitelist option, and for backward compatibility, the old configure option --block-drv-whitelist is now an alias to rw whitelist. Drivers in readonly list is only permitted to open file readonly, and returns -ENOTSUP for RW opening. E.g. To include vmdk readonly, and others read+write: ./configure --target-list=x86_64-softmmu \ --block-drv-rw-whitelist=qcow2,raw,file,qed \ --block-drv-ro-whitelist=vmdk Signed-off-by: Fam Zheng Signed-off-by: Kevin Wolf --- hw/block/xen_disk.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) (limited to 'hw/block/xen_disk.c') diff --git a/hw/block/xen_disk.c b/hw/block/xen_disk.c index 0ac65d4e8f..247f32f4ee 100644 --- a/hw/block/xen_disk.c +++ b/hw/block/xen_disk.c @@ -780,11 +780,13 @@ static int blk_connect(struct XenDevice *xendev) { struct XenBlkDev *blkdev = container_of(xendev, struct XenBlkDev, xendev); int pers, index, qflags; + bool readonly = true; /* read-only ? */ qflags = BDRV_O_CACHE_WB | BDRV_O_NATIVE_AIO; if (strcmp(blkdev->mode, "w") == 0) { qflags |= BDRV_O_RDWR; + readonly = false; } /* init qemu block driver */ @@ -795,8 +797,10 @@ static int blk_connect(struct XenDevice *xendev) xen_be_printf(&blkdev->xendev, 2, "create new bdrv (xenbus setup)\n"); blkdev->bs = bdrv_new(blkdev->dev); if (blkdev->bs) { - if (bdrv_open(blkdev->bs, blkdev->filename, NULL, qflags, - bdrv_find_whitelisted_format(blkdev->fileproto)) != 0) { + BlockDriver *drv = bdrv_find_whitelisted_format(blkdev->fileproto, + readonly); + if (bdrv_open(blkdev->bs, + blkdev->filename, NULL, qflags, drv) != 0) { bdrv_delete(blkdev->bs); blkdev->bs = NULL; } -- cgit v1.2.3