[libvirt] [PATCH 08/12] qemu: Allow forcing read-only mode in qemuDomainStorageSourceAccessModify
Add a new flag which will set the image as read-only even if the image
data allows writing.
Signed-off-by: Peter Krempa <pkrempa(a)redhat.com>
---
src/qemu/qemu_domain.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c
index f7d1250f09..e8f6ee548a 100644
--- a/src/qemu/qemu_domain.c
+++ b/src/qemu/qemu_domain.c
@@ -9216,6 +9216,8 @@ typedef enum {
QEMU_DOMAIN_STORAGE_SOURCE_ACCESS_REVOKE = 1 << 0,
/* operate on full backing chain rather than single image */
QEMU_DOMAIN_STORAGE_SOURCE_ACCESS_CHAIN = 1 << 1,
+ /* force permissions to read-only when allowing */
+ QEMU_DOMAIN_STORAGE_SOURCE_ACCESS_READ_ONLY = 1 << 2,
} qemuDomainStorageSourceAccessFlags;
@@ -9243,6 +9245,10 @@ qemuDomainStorageSourceAccessModify(virQEMUDriverPtr driver,
virErrorPtr orig_err = NULL;
bool chain = flags & QEMU_DOMAIN_STORAGE_SOURCE_ACCESS_CHAIN;
int rc;
+ bool was_readonly = src->readonly;
+
+ if (flags & QEMU_DOMAIN_STORAGE_SOURCE_ACCESS_READ_ONLY)
+ src->readonly = true;
/* just tear down the disk access */
if (flags & QEMU_DOMAIN_STORAGE_SOURCE_ACCESS_REVOKE) {
@@ -9292,6 +9298,7 @@ qemuDomainStorageSourceAccessModify(virQEMUDriverPtr driver,
VIR_WARN("Unable to release lock on %s", srcstr);
cleanup:
+ src->readonly = was_readonly;
virErrorRestore(&orig_err);
return ret;
--
2.20.1