From 807b43b672541832d1f69679a14b37c5ee08a6e3 Mon Sep 17 00:00:00 2001
Message-Id: <807b43b672541832d1f69679a14b37c5ee08a6e3@dist-git>
From: Michal Privoznik <mprivozn@redhat.com>
Date: Thu, 18 Sep 2014 11:45:35 +0200
Subject: [PATCH] virDomainUndefineFlags: Allow NVRAM unlinking
https://bugzilla.redhat.com/show_bug.cgi?id=1026772
When a domain is undefined, there are options to remove it's
managed save state or snapshots. However, there's another file
that libvirt creates per domain: the NVRAM variable store file.
Make sure that the file is not left behind if the domain is
undefined.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
(cherry picked from commit 273b6581ca8dae11e6ff40e3d13813fdbb37d41b)
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
---
include/libvirt/libvirt.h.in | 2 ++
src/qemu/qemu_driver.c | 20 +++++++++++++++++++-
tools/virsh-domain.c | 20 ++++++++++++++++----
tools/virsh.pod | 6 +++++-
4 files changed, 42 insertions(+), 6 deletions(-)
diff --git a/include/libvirt/libvirt.h.in b/include/libvirt/libvirt.h.in
index d895560..ec2fb8c 100644
--- a/include/libvirt/libvirt.h.in
+++ b/include/libvirt/libvirt.h.in
@@ -2257,6 +2257,8 @@ typedef enum {
VIR_DOMAIN_UNDEFINE_SNAPSHOTS_METADATA = (1 << 1), /* If last use of domain,
then also remove any
snapshot metadata */
+ VIR_DOMAIN_UNDEFINE_NVRAM = (1 << 2), /* Also remove any
+ nvram file */
/* Future undefine control flags should come here. */
} virDomainUndefineFlagsValues;
diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index 63bb629..c0927d7 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -6410,7 +6410,8 @@ qemuDomainUndefineFlags(virDomainPtr dom,
virQEMUDriverConfigPtr cfg = NULL;
virCheckFlags(VIR_DOMAIN_UNDEFINE_MANAGED_SAVE |
- VIR_DOMAIN_UNDEFINE_SNAPSHOTS_METADATA, -1);
+ VIR_DOMAIN_UNDEFINE_SNAPSHOTS_METADATA |
+ VIR_DOMAIN_UNDEFINE_NVRAM, -1);
if (!(vm = qemuDomObjFromDomain(dom)))
return -1;
@@ -6459,6 +6460,23 @@ qemuDomainUndefineFlags(virDomainPtr dom,
}
}
+ if (!virDomainObjIsActive(vm) &&
+ vm->def->os.loader && vm->def->os.loader->nvram &&
+ virFileExists(vm->def->os.loader->nvram)) {
+ if (!(flags & VIR_DOMAIN_UNDEFINE_NVRAM)) {
+ virReportError(VIR_ERR_OPERATION_INVALID, "%s",
+ _("cannot delete inactive domain with nvram"));
+ goto cleanup;
+ }
+
+ if (unlink(vm->def->os.loader->nvram) < 0) {
+ virReportSystemError(errno,
+ _("failed to remove nvram: %s"),
+ vm->def->os.loader->nvram);
+ goto cleanup;
+ }
+ }
+
if (virDomainDeleteConfig(cfg->configDir, cfg->autostartDir, vm) < 0)
goto cleanup;
diff --git a/tools/virsh-domain.c b/tools/virsh-domain.c
index 3e974e0..64a0f3d 100644
--- a/tools/virsh-domain.c
+++ b/tools/virsh-domain.c
@@ -3038,6 +3038,10 @@ static const vshCmdOptDef opts_undefine[] = {
.type = VSH_OT_BOOL,
.help = N_("remove all domain snapshot metadata, if inactive")
},
+ {.name = "nvram",
+ .type = VSH_OT_BOOL,
+ .help = N_("remove nvram file, if inactive")
+ },
{.name = NULL}
};
@@ -3060,6 +3064,7 @@ cmdUndefine(vshControl *ctl, const vshCmd *cmd)
bool snapshots_metadata = vshCommandOptBool(cmd, "snapshots-metadata");
bool wipe_storage = vshCommandOptBool(cmd, "wipe-storage");
bool remove_all_storage = vshCommandOptBool(cmd, "remove-all-storage");
+ bool nvram = vshCommandOptBool(cmd, "nvram");
/* Positive if these items exist. */
int has_managed_save = 0;
int has_snapshots_metadata = 0;
@@ -3103,6 +3108,9 @@ cmdUndefine(vshControl *ctl, const vshCmd *cmd)
flags |= VIR_DOMAIN_UNDEFINE_SNAPSHOTS_METADATA;
snapshots_safe = true;
}
+ if (nvram) {
+ flags |= VIR_DOMAIN_UNDEFINE_NVRAM;
+ }
if (!(dom = vshCommandOptDomain(ctl, cmd, &name)))
return false;
@@ -3293,11 +3301,15 @@ cmdUndefine(vshControl *ctl, const vshCmd *cmd)
* VIR_DOMAIN_UNDEFINE_MANAGED_SAVE in 0.9.4, the
* VIR_DOMAIN_UNDEFINE_SNAPSHOTS_METADATA flag was not present
* until 0.9.5; skip to piecewise emulation if we couldn't prove
- * above that the new API is safe. */
- if (managed_save_safe && snapshots_safe) {
+ * above that the new API is safe.
+ * Moreover, only the newer UndefineFlags() API understands
+ * the VIR_DOMAIN_UNDEFINE_NVRAM flag. So if user has
+ * specified --nvram we must use the Flags() API. */
+ if ((managed_save_safe && snapshots_safe) || nvram) {
rc = virDomainUndefineFlags(dom, flags);
- if (rc == 0 || (last_error->code != VIR_ERR_NO_SUPPORT &&
- last_error->code != VIR_ERR_INVALID_ARG))
+ if (rc == 0 || nvram ||
+ (last_error->code != VIR_ERR_NO_SUPPORT &&
+ last_error->code != VIR_ERR_INVALID_ARG))
goto out;
vshResetLibvirtError();
}
diff --git a/tools/virsh.pod b/tools/virsh.pod
index b28677f..5bdd264 100644
--- a/tools/virsh.pod
+++ b/tools/virsh.pod
@@ -2064,7 +2064,7 @@ Output the device used for the TTY console of the domain. If the information
is not available the processes will provide an exit code of 1.
=item B<undefine> I<domain> [I<--managed-save>] [I<--snapshots-metadata>]
-[ {I<--storage> B<volumes> | I<--remove-all-storage>} I<--wipe-storage>]
+[I<--nvram>] [ {I<--storage> B<volumes> | I<--remove-all-storage>} I<--wipe-storage>]
Undefine a domain. If the domain is running, this converts it to a
transient domain, without stopping it. If the domain is inactive,
@@ -2080,6 +2080,10 @@ domain. Without the flag, attempts to undefine an inactive domain with
snapshot metadata will fail. If the domain is active, this flag is
ignored.
+The I<--nvram> flag ensures no nvram (/domain/os/nvram/) file is
+left behind. If the domain has an nvram file and the flag is
+omitted, the undefine will fail.
+
The I<--storage> flag takes a parameter B<volumes>, which is a comma separated
list of volume target names or source paths of storage volumes to be removed
along with the undefined domain. Volumes can be undefined and thus removed only
--
2.1.0