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[Qemu-devel] [PATCH] block: Improve driver whitelist checks
From: |
Kevin Wolf |
Subject: |
[Qemu-devel] [PATCH] block: Improve driver whitelist checks |
Date: |
Thu, 10 Oct 2013 11:57:59 +0200 |
The main intent of this patch is to consolidate the whitelist checks to
a single point in the code instead of spreading it everywhere. This adds
a nicer error message for read-only whitelisting, too, in places where
it was still missing.
The patch also contains a bonus bug fix: By finding the format first in
bdrv_open() and then independently checking against the whitelist only
later, we avoid the case that use of a non-whitelisted format results in
probing rather than an error message. Previously, this could happen when
using the driver=... option.
Signed-off-by: Kevin Wolf <address@hidden>
---
block.c | 10 +++++++---
blockdev.c | 8 ++------
2 files changed, 9 insertions(+), 9 deletions(-)
diff --git a/block.c b/block.c
index beea027..84c0eac 100644
--- a/block.c
+++ b/block.c
@@ -769,7 +769,11 @@ static int bdrv_open_common(BlockDriverState *bs,
BlockDriverState *file,
bs->read_only = !(open_flags & BDRV_O_RDWR);
if (use_bdrv_whitelist && !bdrv_is_whitelisted(drv, bs->read_only)) {
- error_setg(errp, "Driver '%s' is not whitelisted", drv->format_name);
+ error_setg(errp,
+ !bs->read_only && bdrv_is_whitelisted(drv, true)
+ ? "Driver '%s' can only be used for read-only devices"
+ : "Driver '%s' is not whitelisted",
+ drv->format_name);
return -ENOTSUP;
}
@@ -881,7 +885,7 @@ int bdrv_file_open(BlockDriverState **pbs, const char
*filename,
/* Find the right block driver */
drvname = qdict_get_try_str(options, "driver");
if (drvname) {
- drv = bdrv_find_whitelisted_format(drvname, !(flags & BDRV_O_RDWR));
+ drv = bdrv_find_format(drvname);
if (!drv) {
error_setg(errp, "Unknown driver '%s'", drvname);
}
@@ -1123,7 +1127,7 @@ int bdrv_open(BlockDriverState *bs, const char *filename,
QDict *options,
/* Find the right image format driver */
drvname = qdict_get_try_str(options, "driver");
if (drvname) {
- drv = bdrv_find_whitelisted_format(drvname, !(flags & BDRV_O_RDWR));
+ drv = bdrv_find_format(drvname);
qdict_del(options, "driver");
}
diff --git a/blockdev.c b/blockdev.c
index 92029d8..5f3cece 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -468,13 +468,9 @@ static DriveInfo *blockdev_init(QemuOpts *all_opts,
return NULL;
}
- drv = bdrv_find_whitelisted_format(buf, ro);
+ drv = bdrv_find_format(buf);
if (!drv) {
- if (!ro && bdrv_find_whitelisted_format(buf, !ro)) {
- error_report("'%s' can be only used as read-only device.",
buf);
- } else {
- error_report("'%s' invalid format", buf);
- }
+ error_report("'%s' invalid format", buf);
return NULL;
}
}
--
1.8.1.4
- [Qemu-devel] [PATCH] block: Improve driver whitelist checks,
Kevin Wolf <=