On 30/04/2021 17:34, Anthony PERARD wrote:
From: Anthony PERARD <anthony.per...@citrix.com>... when a xen-block backend instance is created via xenstore. Following 8d17adf34f50 ("block: remove support for using "file" driver with block/char devices"), using the "file" blockdev driver for everything doesn't work anymore, we need to use the "host_device" driver when the disk image is a block device and "file" driver when it is a regular file. Signed-off-by: Anthony PERARD <anthony.per...@citrix.com>
Acked-by: Paul Durrant <p...@xen.org>
--- hw/block/xen-block.c | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-) diff --git a/hw/block/xen-block.c b/hw/block/xen-block.c index 83754a434481..674953f1adee 100644 --- a/hw/block/xen-block.c +++ b/hw/block/xen-block.c @@ -728,6 +728,8 @@ static XenBlockDrive *xen_block_drive_create(const char *id, XenBlockDrive *drive = NULL; QDict *file_layer; QDict *driver_layer; + struct stat st; + int rc;if (params) {char **v = g_strsplit(params, ":", 2); @@ -761,7 +763,17 @@ static XenBlockDrive *xen_block_drive_create(const char *id, file_layer = qdict_new(); driver_layer = qdict_new();- qdict_put_str(file_layer, "driver", "file");+ rc = stat(filename, &st); + if (rc) { + error_setg_errno(errp, errno, "Could not stat file '%s'", filename); + goto done; + } + if (S_ISBLK(st.st_mode)) { + qdict_put_str(file_layer, "driver", "host_device"); + } else { + qdict_put_str(file_layer, "driver", "file"); + } + qdict_put_str(file_layer, "filename", filename); g_free(filename);
