From 62f7dbde4c75e48921fd1b773865250130c57bd8 Mon Sep 17 00:00:00 2001 From: Peter Maydell Date: Fri, 26 Jun 2015 14:22:36 +0100 Subject: [PATCH] qdev-properties-system: Improve error message for drive assignment conflict If the user forgot if=none on their drive specification they're likely to get an error message because the drive is assigned once automatically by QEMU and once by the manual id=/drive= user command line specification. Improve the error message produced in this case to explicitly guide the user towards if=none. We rephrase the "drive conflict but not for an if=something" error as well to keep the wording in line. The two cases that change are: (1) Drive specified as to be auto-connected and also manually connected (and the board does handle this if= type): qemu-system-x86_64 -nodefaults -display none \ -drive if=scsi,file=tmp.qcow2,id=foo -device ide-hd,drive=foo Previously: qemu-system-x86_64: -device ide-hd,drive=foo: Property 'ide-hd.drive' can't take value 'foo', it's in use Now: qemu-system-x86_64: -device ide-hd,drive=foo: Drive 'foo' is already in use because it has been automatically connected to another device (did you need 'if=none' in the drive options?) (2) Drive specified to be manually connected in two different ways: qemu-system-x86_64 -nodefaults -display none \ -drive if=none,file=tmp.qcow2,id=foo -device ide-hd,drive=foo \ -device ide-hd,drive=foo Previously: qemu-system-x86_64: -device ide-hd,drive=foo: Property 'ide-hd.drive' can't take value 'foo', it's in use Now: qemu-system-x86_64: -device ide-hd,drive=foo: Drive 'foo' is already in use by another device Signed-off-by: Peter Maydell Reviewed-by: Markus Armbruster Reviewed-by: Stefan Hajnoczi Message-id: 1435068107-12594-3-git-send-email-peter.maydell@linaro.org --- hw/core/qdev-properties-system.c | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-) diff --git a/hw/core/qdev-properties-system.c b/hw/core/qdev-properties-system.c index c731bc657f..921e799dbb 100644 --- a/hw/core/qdev-properties-system.c +++ b/hw/core/qdev-properties-system.c @@ -78,8 +78,17 @@ static void parse_drive(DeviceState *dev, const char *str, void **ptr, return; } if (blk_attach_dev(blk, dev) < 0) { - error_setg(errp, "Property '%s.%s' can't take value '%s', it's in use", - object_get_typename(OBJECT(dev)), propname, str); + DriveInfo *dinfo = blk_legacy_dinfo(blk); + + if (dinfo->type != IF_NONE) { + error_setg(errp, "Drive '%s' is already in use because " + "it has been automatically connected to another " + "device (did you need 'if=none' in the drive options?)", + str); + } else { + error_setg(errp, "Drive '%s' is already in use by another device", + str); + } return; } *ptr = blk;