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qemu: Allow forcing read-only mode in qemuDomainStorageSourceAccessModify

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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@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
This commit is contained in:
Peter Krempa 2019-04-18 15:48:39 +02:00
parent 3decae00e9
commit 3bb1423883
1 changed files with 7 additions and 0 deletions
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7
src/qemu/qemu_domain.c
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@ -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;