8:29 a.m.
The need to have something like this in the first place is driven by
KubeVirt (see [1] and [2]). A draft version of this series has been
integrated into KubeVirt and it has been confirmed that it was
effective in removing the need to use LD_PRELOAD hacks in the storage
provider.
Changes from [v1]:
* documented more explicitly that the newly introduced option is
intended for very specific scenarios and not general usage; as
part of this, the NEWS update has been dropped too;
* made a few tweaks and addressed a few oversight based on review
feedback;
* several preparatory cleanup patches have been pushed.
Changes from [v0]:
* reworked approach.
CC'ing Stefan so he can have a look at the TPM part and shout if I've
gotten anything wrong :)
[v1]
https://lists.libvirt.org/archives/list/devel@lists.libvirt.org/thread/XE...
[v0]
https://lists.libvirt.org/archives/list/devel@lists.libvirt.org/thread/MM...
[1] https://issues.redhat.com/browse/CNV-34322
[2] https://issues.redhat.com/browse/CNV-39370
Andrea Bolognani (5):
security: Fix alignment
qemu: Introduce shared_filesystems configuration option
qemu: Propagate shared_filesystems
utils: Use overrides in virFileIsSharedFS()
qemu: Always set labels for TPM state
src/lxc/lxc_controller.c | 3 +-
src/lxc/lxc_driver.c | 2 +-
src/lxc/lxc_process.c | 4 +-
src/qemu/libvirtd_qemu.aug | 3 ++
src/qemu/qemu.conf.in | 23 ++++++++
src/qemu/qemu_conf.c | 17 ++++++
src/qemu/qemu_conf.h | 2 +
src/qemu/qemu_domain.c | 7 ++-
src/qemu/qemu_extdevice.c | 2 +-
src/qemu/qemu_migration.c | 23 ++++----
src/qemu/qemu_security.c | 85 +++++++++++++++++++++++-------
src/qemu/qemu_tpm.c | 38 +++++++------
src/qemu/qemu_tpm.h | 10 ++--
src/qemu/test_libvirtd_qemu.aug.in | 5 ++
src/security/security_apparmor.c | 2 +
src/security/security_dac.c | 47 +++++++++++++----
src/security/security_driver.h | 8 ++-
src/security/security_manager.c | 33 +++++++++---
src/security/security_manager.h | 9 +++-
src/security/security_nop.c | 5 ++
src/security/security_selinux.c | 56 +++++++++++++++-----
src/security/security_stack.c | 32 ++++++++---
src/util/virfile.c | 53 +++++++++++++++++--
src/util/virfile.h | 3 +-
tests/securityselinuxlabeltest.c | 2 +-
tests/virfiletest.c | 2 +-
26 files changed, 370 insertions(+), 106 deletions(-)
--
2.44.0
8:29 a.m.
New subject: [PATCH v2 1/5] security: Fix alignment
Signed-off-by: Andrea Bolognani <abologna(a)redhat.com>
---
src/security/security_selinux.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/src/security/security_selinux.c b/src/security/security_selinux.c
index aaec34ff8b..a4915dbc89 100644
--- a/src/security/security_selinux.c
+++ b/src/security/security_selinux.c
@@ -1983,9 +1983,9 @@ virSecuritySELinuxSetImageLabelInternal(virSecurityManager *mgr,
static int
virSecuritySELinuxSetImageLabel(virSecurityManager *mgr,
- virDomainDef *def,
- virStorageSource *src,
- virSecurityDomainImageLabelFlags flags)
+ virDomainDef *def,
+ virStorageSource *src,
+ virSecurityDomainImageLabelFlags flags)
{
virStorageSource *parent = src;
virStorageSource *n;
--
2.44.0
2:04 p.m.
New subject: [PATCH v2 1/5] security: Fix alignment
On 4/17/24 09:29, Andrea Bolognani wrote:
Signed-off-by: Andrea Bolognani <abologna(a)redhat.com>
Reviewed-by: Stefan Berger <stefanb(a)linux.ibm.com>
> ---
> src/security/security_selinux.c | 6 +++---
> 1 file changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/src/security/security_selinux.c b/src/security/security_selinux.c
> index aaec34ff8b..a4915dbc89 100644
> --- a/src/security/security_selinux.c
> +++ b/src/security/security_selinux.c
> @@ -1983,9 +1983,9 @@ virSecuritySELinuxSetImageLabelInternal(virSecurityManager
*mgr,
>
> static int
> virSecuritySELinuxSetImageLabel(virSecurityManager *mgr,
> - virDomainDef *def,
> - virStorageSource *src,
> - virSecurityDomainImageLabelFlags flags)
> + virDomainDef *def,
> + virStorageSource *src,
> + virSecurityDomainImageLabelFlags flags)
> {
> virStorageSource *parent = src;
> virStorageSource *n;
8:29 a.m.
New subject: [PATCH v2 2/5] qemu: Introduce shared_filesystems configuration option
As explained in the comment, this can help in scenarios where
a shared filesystem can't be detected as such by libvirt, by
giving the admin the opportunity to provide this information
manually.
Signed-off-by: Andrea Bolognani <abologna(a)redhat.com>
---
src/qemu/libvirtd_qemu.aug | 3 +++
src/qemu/qemu.conf.in | 23 +++++++++++++++++++++++
src/qemu/qemu_conf.c | 17 +++++++++++++++++
src/qemu/qemu_conf.h | 2 ++
src/qemu/test_libvirtd_qemu.aug.in | 5 +++++
5 files changed, 50 insertions(+)
diff --git a/src/qemu/libvirtd_qemu.aug b/src/qemu/libvirtd_qemu.aug
index 2b6526538f..1377fd89cc 100644
--- a/src/qemu/libvirtd_qemu.aug
+++ b/src/qemu/libvirtd_qemu.aug
@@ -143,6 +143,8 @@ module Libvirtd_qemu =
let storage_entry = bool_entry "storage_use_nbdkit"
+ let filesystem_entry = str_array_entry "shared_filesystems"
+
(* Entries that used to exist in the config which are now
* deleted. We keep on parsing them so we don't break
* ability to parse old configs after upgrade
@@ -173,6 +175,7 @@ module Libvirtd_qemu =
| swtpm_entry
| capability_filters_entry
| storage_entry
+ | filesystem_entry
| obsolete_entry
let comment = [ label "#comment" . del /#[ \t]*/ "# " . store
/([^ \t\n][^\n]*)?/ . del /\n/ "\n" ]
diff --git a/src/qemu/qemu.conf.in b/src/qemu/qemu.conf.in
index f406df8749..c543a0a55b 100644
--- a/src/qemu/qemu.conf.in
+++ b/src/qemu/qemu.conf.in
@@ -986,3 +986,26 @@
# note that the default might change in future releases.
#
#storage_use_nbdkit = @USE_NBDKIT_DEFAULT@
+
+# libvirt will normally prevent migration if the storage backing the VM is not
+# on a shared filesystems. Sometimes, however, the storage *is* shared despite
+# not being detected as such: for example, this is the case when one of the
+# hosts involved in the migration is exporting its local storage to the other
+# one via NFS.
+#
+# Any directory listed here will be assumed to live on a shared filesystem,
+# making migration possible in scenarios such as the one described above.
+#
+# Due to how label remembering is implemented, it will generally be necessary
+# to set remember_owner=0 *on both sides of the migration* as well.
+#
+# NOTE: this option is intended to help in very specific scenarios that are
+# rarely encountered. If you find yourself reaching for this option, consider
+# reworking your environment so that it follows a more common architecture
+# rather than using it.
+#
+#shared_filesystems = [
+# "/path/to/images",
+# "/path/to/nvram",
+# "/path/to/swtpm"
+#]
diff --git a/src/qemu/qemu_conf.c b/src/qemu/qemu_conf.c
index 4050a82341..01c6bcc793 100644
--- a/src/qemu/qemu_conf.c
+++ b/src/qemu/qemu_conf.c
@@ -374,6 +374,8 @@ static void virQEMUDriverConfigDispose(void *obj)
g_strfreev(cfg->capabilityfilters);
+ g_strfreev(cfg->sharedFilesystems);
+
g_free(cfg->deprecationBehavior);
}
@@ -1084,6 +1086,18 @@ virQEMUDriverConfigLoadStorageEntry(virQEMUDriverConfig *cfg,
}
+static int
+virQEMUDriverConfigLoadFilesystemEntry(virQEMUDriverConfig *cfg,
+ virConf *conf)
+{
+ if (virConfGetValueStringList(conf, "shared_filesystems", false,
+ &cfg->sharedFilesystems) < 0)
+ return -1;
+
+ return 0;
+}
+
+
int virQEMUDriverConfigLoadFile(virQEMUDriverConfig *cfg,
const char *filename,
bool privileged)
@@ -1158,6 +1172,9 @@ int virQEMUDriverConfigLoadFile(virQEMUDriverConfig *cfg,
if (virQEMUDriverConfigLoadStorageEntry(cfg, conf) < 0)
return -1;
+ if (virQEMUDriverConfigLoadFilesystemEntry(cfg, conf) < 0)
+ return -1;
+
return 0;
}
diff --git a/src/qemu/qemu_conf.h b/src/qemu/qemu_conf.h
index 36049b4bfa..b53d56be02 100644
--- a/src/qemu/qemu_conf.h
+++ b/src/qemu/qemu_conf.h
@@ -233,6 +233,8 @@ struct _virQEMUDriverConfig {
bool storageUseNbdkit;
virQEMUSchedCore schedCore;
+
+ char **sharedFilesystems;
};
G_DEFINE_AUTOPTR_CLEANUP_FUNC(virQEMUDriverConfig, virObjectUnref);
diff --git a/src/qemu/test_libvirtd_qemu.aug.in b/src/qemu/test_libvirtd_qemu.aug.in
index b97e6de11e..69fdae215a 100644
--- a/src/qemu/test_libvirtd_qemu.aug.in
+++ b/src/qemu/test_libvirtd_qemu.aug.in
@@ -119,3 +119,8 @@ module Test_libvirtd_qemu =
{ "deprecation_behavior" = "none" }
{ "sched_core" = "none" }
{ "storage_use_nbdkit" = "@USE_NBDKIT_DEFAULT@" }
+{ "shared_filesystems"
+ { "1" = "/path/to/images" }
+ { "2" = "/path/to/nvram" }
+ { "3" = "/path/to/swtpm" }
+}
--
2.44.0
2:16 p.m.
New subject: [PATCH v2 2/5] qemu: Introduce shared_filesystems configuration
option
On 4/17/24 09:29, Andrea Bolognani wrote:
As explained in the comment, this can help in scenarios where
a shared filesystem can't be detected as such by libvirt, by
giving the admin the opportunity to provide this information
manually.
Signed-off-by: Andrea Bolognani <abologna(a)redhat.com>
---
src/qemu/libvirtd_qemu.aug | 3 +++
src/qemu/qemu.conf.in | 23 +++++++++++++++++++++++
src/qemu/qemu_conf.c | 17 +++++++++++++++++
src/qemu/qemu_conf.h | 2 ++
src/qemu/test_libvirtd_qemu.aug.in | 5 +++++
5 files changed, 50 insertions(+)
diff --git a/src/qemu/libvirtd_qemu.aug b/src/qemu/libvirtd_qemu.aug
index 2b6526538f..1377fd89cc 100644
--- a/src/qemu/libvirtd_qemu.aug
+++ b/src/qemu/libvirtd_qemu.aug
@@ -143,6 +143,8 @@ module Libvirtd_qemu =
let storage_entry = bool_entry "storage_use_nbdkit"
+ let filesystem_entry = str_array_entry "shared_filesystems"
+
(* Entries that used to exist in the config which are now
* deleted. We keep on parsing them so we don't break
* ability to parse old configs after upgrade
@@ -173,6 +175,7 @@ module Libvirtd_qemu =
| swtpm_entry
| capability_filters_entry
| storage_entry
+ | filesystem_entry
| obsolete_entry
let comment = [ label "#comment" . del /#[ \t]*/ "# " . store
/([^ \t\n][^\n]*)?/ . del /\n/ "\n" ]
diff --git a/src/qemu/qemu.conf.in b/src/qemu/qemu.conf.in
index f406df8749..c543a0a55b 100644
--- a/src/qemu/qemu.conf.in
+++ b/src/qemu/qemu.conf.in
@@ -986,3 +986,26 @@
# note that the default might change in future releases.
#
#storage_use_nbdkit = @USE_NBDKIT_DEFAULT@
+
+# libvirt will normally prevent migration if the storage backing the VM is not
+# on a shared filesystems. Sometimes, however, the storage *is* shared despite
+# not being detected as such: for example, this is the case when one of the
+# hosts involved in the migration is exporting its local storage to the other
+# one via NFS.
+#
+# Any directory listed here will be assumed to live on a shared filesystem,
+# making migration possible in scenarios such as the one described above.
+#
+# Due to how label remembering is implemented, it will generally be necessary
+# to set remember_owner=0 *on both sides of the migration* as well.
+#
+# NOTE: this option is intended to help in very specific scenarios that are
+# rarely encountered. If you find yourself reaching for this option, consider
+# reworking your environment so that it follows a more common architecture
+# rather than using it.
+#
+#shared_filesystems = [
+# "/path/to/images",
+# "/path/to/nvram",
+# "/path/to/swtpm"
+#]
May be worth considering: Would it ever be useful or necessary for
libvirt to know what type of filesystem is used for the sharing, so that
users should write nfs:/path/to/swtpm for example? I don't have much
experience with shared filesystems (other than NFS) but maybe sometimes
behavior has to be adjusted depending on what type is being used.
Otherwise LGTM.
> diff --git a/src/qemu/qemu_conf.c b/src/qemu/qemu_conf.c
> index 4050a82341..01c6bcc793 100644
> --- a/src/qemu/qemu_conf.c
> +++ b/src/qemu/qemu_conf.c
> @@ -374,6 +374,8 @@ static void virQEMUDriverConfigDispose(void *obj)
>
> g_strfreev(cfg->capabilityfilters);
>
> + g_strfreev(cfg->sharedFilesystems);
> +
> g_free(cfg->deprecationBehavior);
> }
>
> @@ -1084,6 +1086,18 @@ virQEMUDriverConfigLoadStorageEntry(virQEMUDriverConfig *cfg,
> }
>
>
> +static int
> +virQEMUDriverConfigLoadFilesystemEntry(virQEMUDriverConfig *cfg,
> + virConf *conf)
> +{
> + if (virConfGetValueStringList(conf, "shared_filesystems", false,
> + &cfg->sharedFilesystems) < 0)
> + return -1;
> +
> + return 0;
> +}
> +
> +
> int virQEMUDriverConfigLoadFile(virQEMUDriverConfig *cfg,
> const char *filename,
> bool privileged)
> @@ -1158,6 +1172,9 @@ int virQEMUDriverConfigLoadFile(virQEMUDriverConfig *cfg,
> if (virQEMUDriverConfigLoadStorageEntry(cfg, conf) < 0)
> return -1;
>
> + if (virQEMUDriverConfigLoadFilesystemEntry(cfg, conf) < 0)
> + return -1;
> +
> return 0;
> }
>
> diff --git a/src/qemu/qemu_conf.h b/src/qemu/qemu_conf.h
> index 36049b4bfa..b53d56be02 100644
> --- a/src/qemu/qemu_conf.h
> +++ b/src/qemu/qemu_conf.h
> @@ -233,6 +233,8 @@ struct _virQEMUDriverConfig {
> bool storageUseNbdkit;
>
> virQEMUSchedCore schedCore;
> +
> + char **sharedFilesystems;
> };
>
> G_DEFINE_AUTOPTR_CLEANUP_FUNC(virQEMUDriverConfig, virObjectUnref);
> diff --git a/src/qemu/test_libvirtd_qemu.aug.in b/src/qemu/test_libvirtd_qemu.aug.in
> index b97e6de11e..69fdae215a 100644
> --- a/src/qemu/test_libvirtd_qemu.aug.in
> +++ b/src/qemu/test_libvirtd_qemu.aug.in
> @@ -119,3 +119,8 @@ module Test_libvirtd_qemu =
> { "deprecation_behavior" = "none" }
> { "sched_core" = "none" }
> { "storage_use_nbdkit" = "@USE_NBDKIT_DEFAULT@" }
> +{ "shared_filesystems"
> + { "1" = "/path/to/images" }
> + { "2" = "/path/to/nvram" }
> + { "3" = "/path/to/swtpm" }
> +}
11:14 a.m.
New subject: [PATCH v2 2/5] qemu: Introduce shared_filesystems configuration option
On Wed, Apr 17, 2024 at 03:16:18PM GMT, Stefan Berger wrote:
On 4/17/24 09:29, Andrea Bolognani wrote:
> +#shared_filesystems = [
> +# "/path/to/images",
> +# "/path/to/nvram",
> +# "/path/to/swtpm"
> +#]
May be worth considering: Would it ever be useful or necessary for libvirt
to know what type of filesystem is used for the sharing, so that users
should write nfs:/path/to/swtpm for example? I don't have much experience
with shared filesystems (other than NFS) but maybe sometimes behavior has to
be adjusted depending on what type is being used.
I don't think so. Ultimately it all boils down to a binary choice
implemented via a call to virFileIsSharedFS().
--
Andrea Bolognani / Red Hat / Virtualization
8:29 a.m.
New subject: [PATCH v2 3/5] qemu: Propagate shared_filesystems
virFileIsSharedFS() is the function that ultimately decides
whether a filesystem should be considered shared, but the list
of manually configured shared filesystems is part of the QEMU
driver's configuration, so we need to pass the information
through several layers in order to make use of it.
Note that with this change the list is propagated all the way
through, but its contents are still ignored, so the behavior
remains the same for now.
Signed-off-by: Andrea Bolognani <abologna(a)redhat.com>
---
src/lxc/lxc_controller.c | 3 +-
src/lxc/lxc_driver.c | 2 +-
src/lxc/lxc_process.c | 4 +-
src/qemu/qemu_domain.c | 7 ++-
src/qemu/qemu_extdevice.c | 2 +-
src/qemu/qemu_migration.c | 23 ++++-----
src/qemu/qemu_security.c | 85 ++++++++++++++++++++++++--------
src/qemu/qemu_tpm.c | 29 +++++++----
src/qemu/qemu_tpm.h | 10 ++--
src/security/security_apparmor.c | 2 +
src/security/security_dac.c | 47 ++++++++++++++----
src/security/security_driver.h | 8 ++-
src/security/security_manager.c | 33 ++++++++++---
src/security/security_manager.h | 9 +++-
src/security/security_nop.c | 5 ++
src/security/security_selinux.c | 50 ++++++++++++++-----
src/security/security_stack.c | 32 +++++++++---
src/util/virfile.c | 13 +++--
src/util/virfile.h | 3 +-
tests/securityselinuxlabeltest.c | 2 +-
tests/virfiletest.c | 2 +-
21 files changed, 276 insertions(+), 95 deletions(-)
diff --git a/src/lxc/lxc_controller.c b/src/lxc/lxc_controller.c
index 505b71d05e..7b432a1160 100644
--- a/src/lxc/lxc_controller.c
+++ b/src/lxc/lxc_controller.c
@@ -1919,7 +1919,8 @@ static int virLXCControllerSetupDisk(virLXCController *ctrl,
/* Labelling normally operates on src, but we need
* to actually label the dst here, so hack the config */
def->src->path = dst;
- if (virSecurityManagerSetImageLabel(securityDriver, ctrl->def, def->src,
+ if (virSecurityManagerSetImageLabel(securityDriver,
+ NULL, ctrl->def, def->src,
VIR_SECURITY_DOMAIN_IMAGE_LABEL_BACKING_CHAIN)
< 0)
goto cleanup;
diff --git a/src/lxc/lxc_driver.c b/src/lxc/lxc_driver.c
index 1842ae8f0e..1fda848b0c 100644
--- a/src/lxc/lxc_driver.c
+++ b/src/lxc/lxc_driver.c
@@ -3261,7 +3261,7 @@ lxcDomainAttachDeviceMknodHelper(pid_t pid G_GNUC_UNUSED,
char *tmpsrc = def->src->path;
def->src->path = data->file;
if (virSecurityManagerSetImageLabel(data->driver->securityManager,
- data->vm->def, def->src,
+ NULL, data->vm->def, def->src,
VIR_SECURITY_DOMAIN_IMAGE_LABEL_BACKING_CHAIN) < 0) {
def->src->path = tmpsrc;
goto cleanup;
diff --git a/src/lxc/lxc_process.c b/src/lxc/lxc_process.c
index 30ff4eb3d0..a7e8e2c28e 100644
--- a/src/lxc/lxc_process.c
+++ b/src/lxc/lxc_process.c
@@ -170,7 +170,7 @@ static void virLXCProcessCleanup(virLXCDriver *driver,
}
if (flags & VIR_LXC_PROCESS_CLEANUP_RESTORE_SECLABEL) {
- virSecurityManagerRestoreAllLabel(driver->securityManager,
+ virSecurityManagerRestoreAllLabel(driver->securityManager, NULL,
vm->def, false, false);
}
@@ -1320,7 +1320,7 @@ int virLXCProcessStart(virLXCDriver * driver,
stopFlags |= VIR_LXC_PROCESS_CLEANUP_RELEASE_SECLABEL;
VIR_DEBUG("Setting domain security labels");
- if (virSecurityManagerSetAllLabel(driver->securityManager,
+ if (virSecurityManagerSetAllLabel(driver->securityManager, NULL,
vm->def, NULL, false, false) < 0)
goto cleanup;
stopFlags |= VIR_LXC_PROCESS_CLEANUP_RESTORE_SECLABEL;
diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c
index 6b869797a8..59ed8f4107 100644
--- a/src/qemu/qemu_domain.c
+++ b/src/qemu/qemu_domain.c
@@ -11913,7 +11913,12 @@ virQEMUFileOpenAs(uid_t fallback_uid,
bool need_unlink = false;
unsigned int vfoflags = 0;
int fd = -1;
- int path_shared = virFileIsSharedFS(path);
+ /* Note that it would be pointless to pass
+ * virQEMUDriverConfig.sharedFilesystems here, since those
+ * listed there are by definition paths that can be accessed
+ * as local from the current host. Thus, a second attempt at
+ * opening the file would not make a difference */
+ int path_shared = virFileIsSharedFS(path, NULL);
uid_t uid = geteuid();
gid_t gid = getegid();
diff --git a/src/qemu/qemu_extdevice.c b/src/qemu/qemu_extdevice.c
index ed5976d1f7..dc1bb56237 100644
--- a/src/qemu/qemu_extdevice.c
+++ b/src/qemu/qemu_extdevice.c
@@ -165,7 +165,7 @@ qemuExtDevicesCleanupHost(virQEMUDriver *driver,
virDomainTPMDef *tpm = def->tpms[i];
if (tpm->type == VIR_DOMAIN_TPM_TYPE_EMULATOR)
- qemuExtTPMCleanupHost(tpm, flags, outgoingMigration);
+ qemuExtTPMCleanupHost(driver, tpm, flags, outgoingMigration);
}
}
diff --git a/src/qemu/qemu_migration.c b/src/qemu/qemu_migration.c
index 1faab5dd23..0d496e19fe 100644
--- a/src/qemu/qemu_migration.c
+++ b/src/qemu/qemu_migration.c
@@ -1429,6 +1429,7 @@ qemuMigrationSrcIsAllowed(virDomainObj *vm,
unsigned int flags)
{
qemuDomainObjPrivate *priv = vm->privateData;
+ virQEMUDriver *driver = priv->driver;
int nsnapshots;
int pauseReason;
size_t i;
@@ -1599,7 +1600,7 @@ qemuMigrationSrcIsAllowed(virDomainObj *vm,
}
}
- if (qemuTPMHasSharedStorage(vm->def)&&
+ if (qemuTPMHasSharedStorage(driver, vm->def) &&
!qemuTPMCanMigrateSharedStorage(vm->def)) {
virReportError(VIR_ERR_NO_SUPPORT, "%s",
_("the running swtpm does not support migration with
shared storage"));
@@ -1611,20 +1612,23 @@ qemuMigrationSrcIsAllowed(virDomainObj *vm,
}
static bool
-qemuMigrationSrcIsSafe(virDomainDef *def,
- virQEMUCaps *qemuCaps,
+qemuMigrationSrcIsSafe(virDomainObj *vm,
size_t nmigrate_disks,
const char **migrate_disks,
unsigned int flags)
{
+ qemuDomainObjPrivate *priv = vm->privateData;
+ virQEMUCaps *qemuCaps = priv->qemuCaps;
+ virQEMUDriver *driver = priv->driver;
+ g_autoptr(virQEMUDriverConfig) cfg = virQEMUDriverGetConfig(driver);
bool storagemigration = flags & (VIR_MIGRATE_NON_SHARED_DISK |
VIR_MIGRATE_NON_SHARED_INC);
size_t i;
int rc;
- for (i = 0; i < def->ndisks; i++) {
- virDomainDiskDef *disk = def->disks[i];
+ for (i = 0; i < vm->def->ndisks; i++) {
+ virDomainDiskDef *disk = vm->def->disks[i];
const char *src = virDomainDiskGetSource(disk);
virStorageType actualType = virStorageSourceGetActualType(disk->src);
bool unsafe = false;
@@ -1643,7 +1647,7 @@ qemuMigrationSrcIsSafe(virDomainDef *def,
/* However, disks on local FS (e.g. ext4) are not safe. */
switch (actualType) {
case VIR_STORAGE_TYPE_FILE:
- if ((rc = virFileIsSharedFS(src)) < 0) {
+ if ((rc = virFileIsSharedFS(src, cfg->sharedFilesystems)) < 0) {
return false;
} else if (rc == 0) {
unsafe = true;
@@ -2604,8 +2608,7 @@ qemuMigrationSrcBeginPhase(virQEMUDriver *driver,
return NULL;
if (!(flags & (VIR_MIGRATE_UNSAFE | VIR_MIGRATE_OFFLINE)) &&
- !qemuMigrationSrcIsSafe(vm->def, priv->qemuCaps,
- nmigrate_disks, migrate_disks, flags))
+ !qemuMigrationSrcIsSafe(vm, nmigrate_disks, migrate_disks, flags))
return NULL;
if (flags & VIR_MIGRATE_POSTCOPY &&
@@ -6066,7 +6069,6 @@ qemuMigrationSrcPerformJob(virQEMUDriver *driver,
int ret = -1;
virErrorPtr orig_err = NULL;
g_autoptr(virQEMUDriverConfig) cfg = virQEMUDriverGetConfig(driver);
- qemuDomainObjPrivate *priv = vm->privateData;
qemuDomainJobPrivate *jobPriv = vm->job->privateData;
if (flags & VIR_MIGRATE_POSTCOPY_RESUME) {
@@ -6091,8 +6093,7 @@ qemuMigrationSrcPerformJob(virQEMUDriver *driver,
goto endjob;
if (!(flags & (VIR_MIGRATE_UNSAFE | VIR_MIGRATE_OFFLINE)) &&
- !qemuMigrationSrcIsSafe(vm->def, priv->qemuCaps,
- nmigrate_disks, migrate_disks, flags))
+ !qemuMigrationSrcIsSafe(vm, nmigrate_disks, migrate_disks, flags))
goto endjob;
qemuMigrationSrcStoreDomainState(vm);
diff --git a/src/qemu/qemu_security.c b/src/qemu/qemu_security.c
index 4aaa863ae9..996c95acc0 100644
--- a/src/qemu/qemu_security.c
+++ b/src/qemu/qemu_security.c
@@ -38,15 +38,18 @@ qemuSecuritySetAllLabel(virQEMUDriver *driver,
{
int ret = -1;
qemuDomainObjPrivate *priv = vm->privateData;
+ g_autoptr(virQEMUDriverConfig) cfg = virQEMUDriverGetConfig(driver);
pid_t pid = -1;
if (qemuDomainNamespaceEnabled(vm, QEMU_DOMAIN_NS_MOUNT))
pid = vm->pid;
- if (virSecurityManagerTransactionStart(driver->securityManager) < 0)
+ if (virSecurityManagerTransactionStart(driver->securityManager,
+ cfg->sharedFilesystems) < 0)
goto cleanup;
if (virSecurityManagerSetAllLabel(driver->securityManager,
+ cfg->sharedFilesystems,
vm->def,
incomingPath,
priv->chardevStdioLogd,
@@ -70,6 +73,7 @@ qemuSecurityRestoreAllLabel(virQEMUDriver *driver,
bool migrated)
{
qemuDomainObjPrivate *priv = vm->privateData;
+ g_autoptr(virQEMUDriverConfig) cfg = virQEMUDriverGetConfig(driver);
bool transactionStarted = false;
/* In contrast to qemuSecuritySetAllLabel, do not use vm->pid
@@ -78,10 +82,12 @@ qemuSecurityRestoreAllLabel(virQEMUDriver *driver,
* domain's namespace is gone as qemu was the only process
* running there. We would not succeed in entering the
* namespace then. */
- if (virSecurityManagerTransactionStart(driver->securityManager) >= 0)
+ if (virSecurityManagerTransactionStart(driver->securityManager,
+ cfg->sharedFilesystems) >= 0)
transactionStarted = true;
virSecurityManagerRestoreAllLabel(driver->securityManager,
+ cfg->sharedFilesystems,
vm->def,
migrated,
priv->chardevStdioLogd);
@@ -103,6 +109,7 @@ qemuSecuritySetImageLabel(virQEMUDriver *driver,
bool chainTop)
{
qemuDomainObjPrivate *priv = vm->privateData;
+ g_autoptr(virQEMUDriverConfig) cfg = virQEMUDriverGetConfig(driver);
pid_t pid = -1;
int ret = -1;
virSecurityDomainImageLabelFlags labelFlags = 0;
@@ -116,10 +123,12 @@ qemuSecuritySetImageLabel(virQEMUDriver *driver,
if (qemuDomainNamespaceEnabled(vm, QEMU_DOMAIN_NS_MOUNT))
pid = vm->pid;
- if (virSecurityManagerTransactionStart(driver->securityManager) < 0)
+ if (virSecurityManagerTransactionStart(driver->securityManager,
+ cfg->sharedFilesystems) < 0)
goto cleanup;
if (virSecurityManagerSetImageLabel(driver->securityManager,
+ cfg->sharedFilesystems,
vm->def, src, labelFlags) < 0)
goto cleanup;
@@ -141,6 +150,7 @@ qemuSecurityRestoreImageLabel(virQEMUDriver *driver,
bool backingChain)
{
qemuDomainObjPrivate *priv = vm->privateData;
+ g_autoptr(virQEMUDriverConfig) cfg = virQEMUDriverGetConfig(driver);
pid_t pid = -1;
int ret = -1;
virSecurityDomainImageLabelFlags labelFlags = 0;
@@ -151,10 +161,12 @@ qemuSecurityRestoreImageLabel(virQEMUDriver *driver,
if (qemuDomainNamespaceEnabled(vm, QEMU_DOMAIN_NS_MOUNT))
pid = vm->pid;
- if (virSecurityManagerTransactionStart(driver->securityManager) < 0)
+ if (virSecurityManagerTransactionStart(driver->securityManager,
+ cfg->sharedFilesystems) < 0)
goto cleanup;
if (virSecurityManagerRestoreImageLabel(driver->securityManager,
+ cfg->sharedFilesystems,
vm->def, src, labelFlags) < 0)
goto cleanup;
@@ -176,6 +188,7 @@ qemuSecurityMoveImageMetadata(virQEMUDriver *driver,
virStorageSource *dst)
{
qemuDomainObjPrivate *priv = vm->privateData;
+ g_autoptr(virQEMUDriverConfig) cfg = virQEMUDriverGetConfig(driver);
pid_t pid = -1;
if (!priv->rememberOwner)
@@ -184,7 +197,9 @@ qemuSecurityMoveImageMetadata(virQEMUDriver *driver,
if (qemuDomainNamespaceEnabled(vm, QEMU_DOMAIN_NS_MOUNT))
pid = vm->pid;
- return virSecurityManagerMoveImageMetadata(driver->securityManager, pid, src,
dst);
+ return virSecurityManagerMoveImageMetadata(driver->securityManager,
+ cfg->sharedFilesystems,
+ pid, src, dst);
}
@@ -194,13 +209,15 @@ qemuSecuritySetHostdevLabel(virQEMUDriver *driver,
virDomainHostdevDef *hostdev)
{
qemuDomainObjPrivate *priv = vm->privateData;
+ g_autoptr(virQEMUDriverConfig) cfg = virQEMUDriverGetConfig(driver);
pid_t pid = -1;
int ret = -1;
if (qemuDomainNamespaceEnabled(vm, QEMU_DOMAIN_NS_MOUNT))
pid = vm->pid;
- if (virSecurityManagerTransactionStart(driver->securityManager) < 0)
+ if (virSecurityManagerTransactionStart(driver->securityManager,
+ cfg->sharedFilesystems) < 0)
goto cleanup;
if (virSecurityManagerSetHostdevLabel(driver->securityManager,
@@ -226,13 +243,15 @@ qemuSecurityRestoreHostdevLabel(virQEMUDriver *driver,
virDomainHostdevDef *hostdev)
{
qemuDomainObjPrivate *priv = vm->privateData;
+ g_autoptr(virQEMUDriverConfig) cfg = virQEMUDriverGetConfig(driver);
pid_t pid = -1;
int ret = -1;
if (qemuDomainNamespaceEnabled(vm, QEMU_DOMAIN_NS_MOUNT))
pid = vm->pid;
- if (virSecurityManagerTransactionStart(driver->securityManager) < 0)
+ if (virSecurityManagerTransactionStart(driver->securityManager,
+ cfg->sharedFilesystems) < 0)
goto cleanup;
if (virSecurityManagerRestoreHostdevLabel(driver->securityManager,
@@ -258,13 +277,15 @@ qemuSecuritySetMemoryLabel(virQEMUDriver *driver,
virDomainMemoryDef *mem)
{
qemuDomainObjPrivate *priv = vm->privateData;
+ g_autoptr(virQEMUDriverConfig) cfg = virQEMUDriverGetConfig(driver);
pid_t pid = -1;
int ret = -1;
if (qemuDomainNamespaceEnabled(vm, QEMU_DOMAIN_NS_MOUNT))
pid = vm->pid;
- if (virSecurityManagerTransactionStart(driver->securityManager) < 0)
+ if (virSecurityManagerTransactionStart(driver->securityManager,
+ cfg->sharedFilesystems) < 0)
goto cleanup;
if (virSecurityManagerSetMemoryLabel(driver->securityManager,
@@ -289,13 +310,15 @@ qemuSecurityRestoreMemoryLabel(virQEMUDriver *driver,
virDomainMemoryDef *mem)
{
qemuDomainObjPrivate *priv = vm->privateData;
+ g_autoptr(virQEMUDriverConfig) cfg = virQEMUDriverGetConfig(driver);
pid_t pid = -1;
int ret = -1;
if (qemuDomainNamespaceEnabled(vm, QEMU_DOMAIN_NS_MOUNT))
pid = vm->pid;
- if (virSecurityManagerTransactionStart(driver->securityManager) < 0)
+ if (virSecurityManagerTransactionStart(driver->securityManager,
+ cfg->sharedFilesystems) < 0)
goto cleanup;
if (virSecurityManagerRestoreMemoryLabel(driver->securityManager,
@@ -320,13 +343,15 @@ qemuSecuritySetInputLabel(virDomainObj *vm,
{
qemuDomainObjPrivate *priv = vm->privateData;
virQEMUDriver *driver = priv->driver;
+ g_autoptr(virQEMUDriverConfig) cfg = virQEMUDriverGetConfig(driver);
pid_t pid = -1;
int ret = -1;
if (qemuDomainNamespaceEnabled(vm, QEMU_DOMAIN_NS_MOUNT))
pid = vm->pid;
- if (virSecurityManagerTransactionStart(driver->securityManager) < 0)
+ if (virSecurityManagerTransactionStart(driver->securityManager,
+ cfg->sharedFilesystems) < 0)
goto cleanup;
if (virSecurityManagerSetInputLabel(driver->securityManager,
@@ -351,13 +376,15 @@ qemuSecurityRestoreInputLabel(virDomainObj *vm,
{
qemuDomainObjPrivate *priv = vm->privateData;
virQEMUDriver *driver = priv->driver;
+ g_autoptr(virQEMUDriverConfig) cfg = virQEMUDriverGetConfig(driver);
pid_t pid = -1;
int ret = -1;
if (qemuDomainNamespaceEnabled(vm, QEMU_DOMAIN_NS_MOUNT))
pid = vm->pid;
- if (virSecurityManagerTransactionStart(driver->securityManager) < 0)
+ if (virSecurityManagerTransactionStart(driver->securityManager,
+ cfg->sharedFilesystems) < 0)
goto cleanup;
if (virSecurityManagerRestoreInputLabel(driver->securityManager,
@@ -383,12 +410,14 @@ qemuSecuritySetChardevLabel(virQEMUDriver *driver,
{
int ret = -1;
qemuDomainObjPrivate *priv = vm->privateData;
+ g_autoptr(virQEMUDriverConfig) cfg = virQEMUDriverGetConfig(driver);
pid_t pid = -1;
if (qemuDomainNamespaceEnabled(vm, QEMU_DOMAIN_NS_MOUNT))
pid = vm->pid;
- if (virSecurityManagerTransactionStart(driver->securityManager) < 0)
+ if (virSecurityManagerTransactionStart(driver->securityManager,
+ cfg->sharedFilesystems) < 0)
goto cleanup;
if (virSecurityManagerSetChardevLabel(driver->securityManager,
@@ -415,12 +444,14 @@ qemuSecurityRestoreChardevLabel(virQEMUDriver *driver,
{
int ret = -1;
qemuDomainObjPrivate *priv = vm->privateData;
+ g_autoptr(virQEMUDriverConfig) cfg = virQEMUDriverGetConfig(driver);
pid_t pid = -1;
if (qemuDomainNamespaceEnabled(vm, QEMU_DOMAIN_NS_MOUNT))
pid = vm->pid;
- if (virSecurityManagerTransactionStart(driver->securityManager) < 0)
+ if (virSecurityManagerTransactionStart(driver->securityManager,
+ cfg->sharedFilesystems) < 0)
goto cleanup;
if (virSecurityManagerRestoreChardevLabel(driver->securityManager,
@@ -446,12 +477,14 @@ qemuSecuritySetNetdevLabel(virQEMUDriver *driver,
{
int ret = -1;
qemuDomainObjPrivate *priv = vm->privateData;
+ g_autoptr(virQEMUDriverConfig) cfg = virQEMUDriverGetConfig(driver);
pid_t pid = -1;
if (qemuDomainNamespaceEnabled(vm, QEMU_DOMAIN_NS_MOUNT))
pid = vm->pid;
- if (virSecurityManagerTransactionStart(driver->securityManager) < 0)
+ if (virSecurityManagerTransactionStart(driver->securityManager,
+ cfg->sharedFilesystems) < 0)
goto cleanup;
if (virSecurityManagerSetNetdevLabel(driver->securityManager,
@@ -476,12 +509,14 @@ qemuSecurityRestoreNetdevLabel(virQEMUDriver *driver,
{
int ret = -1;
qemuDomainObjPrivate *priv = vm->privateData;
+ g_autoptr(virQEMUDriverConfig) cfg = virQEMUDriverGetConfig(driver);
pid_t pid = -1;
if (qemuDomainNamespaceEnabled(vm, QEMU_DOMAIN_NS_MOUNT))
pid = vm->pid;
- if (virSecurityManagerTransactionStart(driver->securityManager) < 0)
+ if (virSecurityManagerTransactionStart(driver->securityManager,
+ cfg->sharedFilesystems) < 0)
goto cleanup;
if (virSecurityManagerRestoreNetdevLabel(driver->securityManager,
@@ -505,9 +540,11 @@ qemuSecuritySetTPMLabels(virQEMUDriver *driver,
bool setTPMStateLabel)
{
qemuDomainObjPrivate *priv = vm->privateData;
+ g_autoptr(virQEMUDriverConfig) cfg = virQEMUDriverGetConfig(driver);
int ret = -1;
- if (virSecurityManagerTransactionStart(driver->securityManager) < 0)
+ if (virSecurityManagerTransactionStart(driver->securityManager,
+ cfg->sharedFilesystems) < 0)
goto cleanup;
if (virSecurityManagerSetTPMLabels(driver->securityManager,
@@ -531,9 +568,11 @@ qemuSecurityRestoreTPMLabels(virQEMUDriver *driver,
bool restoreTPMStateLabel)
{
qemuDomainObjPrivate *priv = vm->privateData;
+ g_autoptr(virQEMUDriverConfig) cfg = virQEMUDriverGetConfig(driver);
int ret = -1;
- if (virSecurityManagerTransactionStart(driver->securityManager) < 0)
+ if (virSecurityManagerTransactionStart(driver->securityManager,
+ cfg->sharedFilesystems) < 0)
goto cleanup;
if (virSecurityManagerRestoreTPMLabels(driver->securityManager,
@@ -558,13 +597,15 @@ qemuSecurityDomainSetPathLabel(virQEMUDriver *driver,
bool allowSubtree)
{
qemuDomainObjPrivate *priv = vm->privateData;
+ g_autoptr(virQEMUDriverConfig) cfg = virQEMUDriverGetConfig(driver);
pid_t pid = -1;
int ret = -1;
if (qemuDomainNamespaceEnabled(vm, QEMU_DOMAIN_NS_MOUNT))
pid = vm->pid;
- if (virSecurityManagerTransactionStart(driver->securityManager) < 0)
+ if (virSecurityManagerTransactionStart(driver->securityManager,
+ cfg->sharedFilesystems) < 0)
goto cleanup;
if (virSecurityManagerDomainSetPathLabel(driver->securityManager,
@@ -590,13 +631,15 @@ qemuSecurityDomainRestorePathLabel(virQEMUDriver *driver,
const char *path)
{
qemuDomainObjPrivate *priv = vm->privateData;
+ g_autoptr(virQEMUDriverConfig) cfg = virQEMUDriverGetConfig(driver);
pid_t pid = -1;
int ret = -1;
if (qemuDomainNamespaceEnabled(vm, QEMU_DOMAIN_NS_MOUNT))
pid = vm->pid;
- if (virSecurityManagerTransactionStart(driver->securityManager) < 0)
+ if (virSecurityManagerTransactionStart(driver->securityManager,
+ cfg->sharedFilesystems) < 0)
goto cleanup;
if (virSecurityManagerDomainRestorePathLabel(driver->securityManager,
@@ -634,6 +677,7 @@ qemuSecurityDomainSetMountNSPathLabel(virQEMUDriver *driver,
const char *path)
{
int ret = -1;
+ g_autoptr(virQEMUDriverConfig) cfg = virQEMUDriverGetConfig(driver);
if (!qemuDomainNamespaceEnabled(vm, QEMU_DOMAIN_NS_MOUNT)) {
VIR_DEBUG("Not labeling '%s': mount namespace disabled for domain
'%s'",
@@ -641,7 +685,8 @@ qemuSecurityDomainSetMountNSPathLabel(virQEMUDriver *driver,
return 1;
}
- if (virSecurityManagerTransactionStart(driver->securityManager) < 0)
+ if (virSecurityManagerTransactionStart(driver->securityManager,
+ cfg->sharedFilesystems) < 0)
goto cleanup;
if (virSecurityManagerDomainSetPathLabel(driver->securityManager,
diff --git a/src/qemu/qemu_tpm.c b/src/qemu/qemu_tpm.c
index bf0c6bcb0d..cdf4bfbad2 100644
--- a/src/qemu/qemu_tpm.c
+++ b/src/qemu/qemu_tpm.c
@@ -538,6 +538,7 @@ qemuTPMEmulatorReconfigure(const char *storagepath,
* @privileged: whether we are running in privileged mode
* @swtpm_user: The uid for the swtpm to run as (drop privileges to from root)
* @swtpm_group: The gid for the swtpm to run as
+ * @sharedFilesystems: list of filesystem to consider shared
* @incomingMigration: whether we have an incoming migration
*
* Create the virCommand use for starting the emulator
@@ -551,6 +552,7 @@ qemuTPMEmulatorBuildCommand(virDomainTPMDef *tpm,
bool privileged,
uid_t swtpm_user,
gid_t swtpm_group,
+ char *const *sharedFilesystems,
bool incomingMigration)
{
g_autoptr(virCommand) cmd = NULL;
@@ -568,7 +570,7 @@ qemuTPMEmulatorBuildCommand(virDomainTPMDef *tpm,
/* Do not create storage and run swtpm_setup on incoming migration over
* shared storage
*/
- on_shared_storage = virFileIsSharedFS(tpm->data.emulator.storagepath) == 1;
+ on_shared_storage = virFileIsSharedFS(tpm->data.emulator.storagepath,
sharedFilesystems) == 1;
if (incomingMigration && on_shared_storage)
create_storage = false;
@@ -734,6 +736,7 @@ qemuTPMEmulatorInitPaths(virDomainTPMDef *tpm,
/**
* qemuTPMEmulatorCleanupHost:
+ * @driver: QEMU driver
* @tpm: TPM definition
* @flags: flags indicating whether to keep or remove TPM persistent state
* @outgoingMigration: whether cleanup is due to an outgoing migration
@@ -741,15 +744,18 @@ qemuTPMEmulatorInitPaths(virDomainTPMDef *tpm,
* Clean up persistent storage for the swtpm.
*/
static void
-qemuTPMEmulatorCleanupHost(virDomainTPMDef *tpm,
+qemuTPMEmulatorCleanupHost(virQEMUDriver *driver,
+ virDomainTPMDef *tpm,
virDomainUndefineFlagsValues flags,
bool outgoingMigration)
{
+ g_autoptr(virQEMUDriverConfig) cfg = virQEMUDriverGetConfig(driver);
+
/* Never remove the state in case of outgoing migration with shared
* storage.
*/
if (outgoingMigration &&
- virFileIsSharedFS(tpm->data.emulator.storagepath) == 1)
+ virFileIsSharedFS(tpm->data.emulator.storagepath, cfg->sharedFilesystems)
== 1)
return;
/*
@@ -935,6 +941,7 @@ qemuTPMEmulatorStart(virQEMUDriver *driver,
driver->privileged,
cfg->swtpm_user,
cfg->swtpm_group,
+ cfg->sharedFilesystems,
incomingMigration)))
return -1;
@@ -950,7 +957,7 @@ qemuTPMEmulatorStart(virQEMUDriver *driver,
virCommandSetErrorFD(cmd, &errfd);
if (incomingMigration &&
- virFileIsSharedFS(tpm->data.emulator.storagepath) == 1) {
+ virFileIsSharedFS(tpm->data.emulator.storagepath, cfg->sharedFilesystems)
== 1) {
/* security labels must have been set up on source already */
setTPMStateLabel = false;
}
@@ -1010,8 +1017,10 @@ qemuTPMEmulatorStart(virQEMUDriver *driver,
bool
-qemuTPMHasSharedStorage(virDomainDef *def)
+qemuTPMHasSharedStorage(virQEMUDriver *driver,
+ virDomainDef *def)
{
+ g_autoptr(virQEMUDriverConfig) cfg = virQEMUDriverGetConfig(driver);
size_t i;
for (i = 0; i < def->ntpms; i++) {
@@ -1019,7 +1028,8 @@ qemuTPMHasSharedStorage(virDomainDef *def)
switch (tpm->type) {
case VIR_DOMAIN_TPM_TYPE_EMULATOR:
- return virFileIsSharedFS(tpm->data.emulator.storagepath) == 1;
+ return virFileIsSharedFS(tpm->data.emulator.storagepath,
+ cfg->sharedFilesystems) == 1;
case VIR_DOMAIN_TPM_TYPE_PASSTHROUGH:
case VIR_DOMAIN_TPM_TYPE_EXTERNAL:
case VIR_DOMAIN_TPM_TYPE_LAST:
@@ -1097,11 +1107,12 @@ qemuExtTPMPrepareHost(virQEMUDriver *driver,
void
-qemuExtTPMCleanupHost(virDomainTPMDef *tpm,
+qemuExtTPMCleanupHost(virQEMUDriver *driver,
+ virDomainTPMDef *tpm,
virDomainUndefineFlagsValues flags,
bool outgoingMigration)
{
- qemuTPMEmulatorCleanupHost(tpm, flags, outgoingMigration);
+ qemuTPMEmulatorCleanupHost(driver, tpm, flags, outgoingMigration);
}
@@ -1133,7 +1144,7 @@ qemuExtTPMStop(virQEMUDriver *driver,
return;
qemuTPMEmulatorStop(cfg->swtpmStateDir, shortName);
- if (outgoingMigration && qemuTPMHasSharedStorage(vm->def))
+ if (outgoingMigration && qemuTPMHasSharedStorage(driver, vm->def))
restoreTPMStateLabel = false;
if (qemuSecurityRestoreTPMLabels(driver, vm, restoreTPMStateLabel) < 0)
diff --git a/src/qemu/qemu_tpm.h b/src/qemu/qemu_tpm.h
index 33ba5d2268..3071dc3f71 100644
--- a/src/qemu/qemu_tpm.h
+++ b/src/qemu/qemu_tpm.h
@@ -35,10 +35,11 @@ int qemuExtTPMPrepareHost(virQEMUDriver *driver,
ATTRIBUTE_NONNULL(3)
G_GNUC_WARN_UNUSED_RESULT;
-void qemuExtTPMCleanupHost(virDomainTPMDef *tpm,
+void qemuExtTPMCleanupHost(virQEMUDriver *driver,
+ virDomainTPMDef *tpm,
virDomainUndefineFlagsValues flags,
bool outgoingMigration)
- ATTRIBUTE_NONNULL(1);
+ ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2);
int qemuExtTPMStart(virQEMUDriver *driver,
virDomainObj *vm,
@@ -59,8 +60,9 @@ int qemuExtTPMSetupCgroup(virQEMUDriver *driver,
ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2) ATTRIBUTE_NONNULL(3)
G_GNUC_WARN_UNUSED_RESULT;
-bool qemuTPMHasSharedStorage(virDomainDef *def)
- ATTRIBUTE_NONNULL(1)
+bool qemuTPMHasSharedStorage(virQEMUDriver *driver,
+ virDomainDef *def)
+ ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2)
G_GNUC_WARN_UNUSED_RESULT;
bool qemuTPMCanMigrateSharedStorage(virDomainDef *def)
diff --git a/src/security/security_apparmor.c b/src/security/security_apparmor.c
index c1dc859751..5c39cfdbc1 100644
--- a/src/security/security_apparmor.c
+++ b/src/security/security_apparmor.c
@@ -507,6 +507,7 @@ AppArmorReleaseSecurityLabel(virSecurityManager *mgr G_GNUC_UNUSED,
static int
AppArmorRestoreSecurityAllLabel(virSecurityManager *mgr G_GNUC_UNUSED,
+ char *const *sharedFilesystems G_GNUC_UNUSED,
virDomainDef *def,
bool migrated G_GNUC_UNUSED,
bool chardevStdioLogd G_GNUC_UNUSED)
@@ -625,6 +626,7 @@ AppArmorClearSecuritySocketLabel(virSecurityManager *mgr
G_GNUC_UNUSED,
/* Called when hotplugging */
static int
AppArmorRestoreSecurityImageLabel(virSecurityManager *mgr,
+ char *const *sharedFilesystems G_GNUC_UNUSED,
virDomainDef *def,
virStorageSource *src,
virSecurityDomainImageLabelFlags flags G_GNUC_UNUSED)
diff --git a/src/security/security_dac.c b/src/security/security_dac.c
index 4e850e219e..9957e2663e 100644
--- a/src/security/security_dac.c
+++ b/src/security/security_dac.c
@@ -79,6 +79,7 @@ struct _virSecurityDACChownItem {
typedef struct _virSecurityDACChownList virSecurityDACChownList;
struct _virSecurityDACChownList {
virSecurityManager *manager;
+ char **sharedFilesystems;
virSecurityDACChownItem **items;
size_t nItems;
bool lock;
@@ -137,6 +138,7 @@ virSecurityDACChownListFree(void *opaque)
virSecurityDACChownItemFree(list->items[i]);
g_free(list->items);
virObjectUnref(list->manager);
+ g_strfreev(list->sharedFilesystems);
g_free(list);
}
@@ -228,7 +230,9 @@ virSecurityDACTransactionRun(pid_t pid G_GNUC_UNUSED,
VIR_APPEND_ELEMENT_COPY_INPLACE(paths, npaths, p);
}
- if (!(state = virSecurityManagerMetadataLock(list->manager, paths, npaths)))
+ if (!(state = virSecurityManagerMetadataLock(list->manager,
+ list->sharedFilesystems,
+ paths, npaths)))
return -1;
for (i = 0; i < list->nItems; i++) {
@@ -538,6 +542,7 @@ virSecurityDACPreFork(virSecurityManager *mgr)
/**
* virSecurityDACTransactionStart:
* @mgr: security manager
+ * @sharedFilesystems: list of filesystem to consider shared
*
* Starts a new transaction. In transaction nothing is chown()-ed until
* TransactionCommit() is called. This is implemented as a list that is
@@ -549,7 +554,8 @@ virSecurityDACPreFork(virSecurityManager *mgr)
* -1 otherwise.
*/
static int
-virSecurityDACTransactionStart(virSecurityManager *mgr)
+virSecurityDACTransactionStart(virSecurityManager *mgr,
+ char *const *sharedFilesystems)
{
g_autoptr(virSecurityDACChownList) list = NULL;
@@ -562,6 +568,7 @@ virSecurityDACTransactionStart(virSecurityManager *mgr)
list = g_new0(virSecurityDACChownList, 1);
list->manager = virObjectRef(mgr);
+ list->sharedFilesystems = g_strdupv((char **) sharedFilesystems);
if (virThreadLocalSet(&chownList, list) < 0) {
virReportSystemError(errno, "%s",
@@ -864,6 +871,7 @@ virSecurityDACRestoreFileLabel(virSecurityManager *mgr,
static int
virSecurityDACSetImageLabelInternal(virSecurityManager *mgr,
+ char *const *sharedFilesystems G_GNUC_UNUSED,
virDomainDef *def,
virStorageSource *src,
virStorageSource *parent,
@@ -943,6 +951,7 @@ virSecurityDACSetImageLabelInternal(virSecurityManager *mgr,
static int
virSecurityDACSetImageLabel(virSecurityManager *mgr,
+ char *const *sharedFilesystems,
virDomainDef *def,
virStorageSource *src,
virSecurityDomainImageLabelFlags flags)
@@ -953,7 +962,8 @@ virSecurityDACSetImageLabel(virSecurityManager *mgr,
for (n = src; virStorageSourceIsBacking(n); n = n->backingStore) {
const bool isChainTop = flags & VIR_SECURITY_DOMAIN_IMAGE_PARENT_CHAIN_TOP;
- if (virSecurityDACSetImageLabelInternal(mgr, def, n, parent, isChainTop) < 0)
+ if (virSecurityDACSetImageLabelInternal(mgr, sharedFilesystems,
+ def, n, parent, isChainTop) < 0)
return -1;
if (!(flags & VIR_SECURITY_DOMAIN_IMAGE_LABEL_BACKING_CHAIN))
@@ -967,6 +977,7 @@ virSecurityDACSetImageLabel(virSecurityManager *mgr,
static int
virSecurityDACRestoreImageLabelInt(virSecurityManager *mgr,
+ char *const *sharedFilesystems,
virDomainDef *def,
virStorageSource *src,
bool migrated)
@@ -1009,7 +1020,7 @@ virSecurityDACRestoreImageLabelInt(virSecurityManager *mgr,
if (!src->path)
return 0;
- if ((rc = virFileIsSharedFS(src->path)) < 0)
+ if ((rc = virFileIsSharedFS(src->path, sharedFilesystems)) < 0)
return -1;
}
@@ -1043,16 +1054,19 @@ virSecurityDACRestoreImageLabelInt(virSecurityManager *mgr,
static int
virSecurityDACRestoreImageLabel(virSecurityManager *mgr,
+ char *const *sharedFilesystems,
virDomainDef *def,
virStorageSource *src,
virSecurityDomainImageLabelFlags flags G_GNUC_UNUSED)
{
- return virSecurityDACRestoreImageLabelInt(mgr, def, src, false);
+ return virSecurityDACRestoreImageLabelInt(mgr, sharedFilesystems,
+ def, src, false);
}
struct virSecurityDACMoveImageMetadataData {
virSecurityManager *mgr;
+ char **sharedFilesystems;
const char *src;
const char *dst;
};
@@ -1067,7 +1081,9 @@ virSecurityDACMoveImageMetadataHelper(pid_t pid G_GNUC_UNUSED,
virSecurityManagerMetadataLockState *state;
int ret;
- if (!(state = virSecurityManagerMetadataLock(data->mgr, paths,
G_N_ELEMENTS(paths))))
+ if (!(state = virSecurityManagerMetadataLock(data->mgr,
+ data->sharedFilesystems,
+ paths, G_N_ELEMENTS(paths))))
return -1;
ret = virSecurityMoveRememberedLabel(SECURITY_DAC_NAME, data->src, data->dst);
@@ -1084,12 +1100,17 @@ virSecurityDACMoveImageMetadataHelper(pid_t pid G_GNUC_UNUSED,
static int
virSecurityDACMoveImageMetadata(virSecurityManager *mgr,
+ char *const *sharedFilesystems,
pid_t pid,
virStorageSource *src,
virStorageSource *dst)
{
virSecurityDACData *priv = virSecurityManagerGetPrivateData(mgr);
- struct virSecurityDACMoveImageMetadataData data = { .mgr = mgr, 0 };
+ struct virSecurityDACMoveImageMetadataData data = {
+ .mgr = mgr,
+ .sharedFilesystems = (char **) sharedFilesystems,
+ 0
+ };
int rc;
/* If dynamicOwnership is turned off, or owner remembering is
@@ -1888,6 +1909,7 @@ virSecurityDACRestoreSysinfoLabel(virSecurityManager *mgr,
static int
virSecurityDACRestoreAllLabel(virSecurityManager *mgr,
+ char *const *sharedFilesystems,
virDomainDef *def,
bool migrated,
bool chardevStdioLogd)
@@ -1912,6 +1934,7 @@ virSecurityDACRestoreAllLabel(virSecurityManager *mgr,
for (i = 0; i < def->ndisks; i++) {
if (virSecurityDACRestoreImageLabelInt(mgr,
+ sharedFilesystems,
def,
def->disks[i]->src,
migrated) < 0)
@@ -1969,7 +1992,8 @@ virSecurityDACRestoreAllLabel(virSecurityManager *mgr,
}
if (def->os.loader && def->os.loader->nvram) {
- if (virSecurityDACRestoreImageLabelInt(mgr, def, def->os.loader->nvram,
+ if (virSecurityDACRestoreImageLabelInt(mgr, sharedFilesystems,
+ def, def->os.loader->nvram,
migrated) < 0)
rc = -1;
}
@@ -2111,6 +2135,7 @@ virSecurityDACSetSysinfoLabel(virSecurityManager *mgr,
static int
virSecurityDACSetAllLabel(virSecurityManager *mgr,
+ char *const *sharedFilesystems,
virDomainDef *def,
const char *incomingPath G_GNUC_UNUSED,
bool chardevStdioLogd,
@@ -2136,7 +2161,8 @@ virSecurityDACSetAllLabel(virSecurityManager *mgr,
/* XXX fixme - we need to recursively label the entire tree :-( */
if (virDomainDiskGetType(def->disks[i]) == VIR_STORAGE_TYPE_DIR)
continue;
- if (virSecurityDACSetImageLabel(mgr, def, def->disks[i]->src,
+ if (virSecurityDACSetImageLabel(mgr, sharedFilesystems,
+ def, def->disks[i]->src,
VIR_SECURITY_DOMAIN_IMAGE_LABEL_BACKING_CHAIN |
VIR_SECURITY_DOMAIN_IMAGE_PARENT_CHAIN_TOP) <
0)
return -1;
@@ -2195,7 +2221,8 @@ virSecurityDACSetAllLabel(virSecurityManager *mgr,
}
if (def->os.loader && def->os.loader->nvram) {
- if (virSecurityDACSetImageLabel(mgr, def, def->os.loader->nvram,
+ if (virSecurityDACSetImageLabel(mgr, sharedFilesystems,
+ def, def->os.loader->nvram,
VIR_SECURITY_DOMAIN_IMAGE_LABEL_BACKING_CHAIN |
VIR_SECURITY_DOMAIN_IMAGE_PARENT_CHAIN_TOP) <
0)
return -1;
diff --git a/src/security/security_driver.h b/src/security/security_driver.h
index aa1fb2125d..2956e002ff 100644
--- a/src/security/security_driver.h
+++ b/src/security/security_driver.h
@@ -46,7 +46,8 @@ typedef const char *(*virSecurityDriverGetBaseLabel) (virSecurityManager
*mgr,
typedef int (*virSecurityDriverPreFork) (virSecurityManager *mgr);
-typedef int (*virSecurityDriverTransactionStart) (virSecurityManager *mgr);
+typedef int (*virSecurityDriverTransactionStart) (virSecurityManager *mgr,
+ char *const *sharedFilesystems);
typedef int (*virSecurityDriverTransactionCommit) (virSecurityManager *mgr,
pid_t pid,
bool lock);
@@ -80,11 +81,13 @@ typedef int (*virSecurityDomainReserveLabel) (virSecurityManager
*mgr,
typedef int (*virSecurityDomainReleaseLabel) (virSecurityManager *mgr,
virDomainDef *sec);
typedef int (*virSecurityDomainSetAllLabel) (virSecurityManager *mgr,
+ char *const *sharedFilesystems,
virDomainDef *sec,
const char *incomingPath,
bool chardevStdioLogd,
bool migrated);
typedef int (*virSecurityDomainRestoreAllLabel) (virSecurityManager *mgr,
+ char *const *sharedFilesystems,
virDomainDef *def,
bool migrated,
bool chardevStdioLogd);
@@ -113,14 +116,17 @@ typedef int (*virSecurityDomainSetHugepages) (virSecurityManager
*mgr,
const char *path);
typedef int (*virSecurityDomainSetImageLabel) (virSecurityManager *mgr,
+ char *const *sharedFilesystems,
virDomainDef *def,
virStorageSource *src,
virSecurityDomainImageLabelFlags flags);
typedef int (*virSecurityDomainRestoreImageLabel) (virSecurityManager *mgr,
+ char *const *sharedFilesystems,
virDomainDef *def,
virStorageSource *src,
virSecurityDomainImageLabelFlags
flags);
typedef int (*virSecurityDomainMoveImageMetadata) (virSecurityManager *mgr,
+ char *const *sharedFilesystems,
pid_t pid,
virStorageSource *src,
virStorageSource *dst);
diff --git a/src/security/security_manager.c b/src/security/security_manager.c
index 24f2f3d3dc..3e341be007 100644
--- a/src/security/security_manager.c
+++ b/src/security/security_manager.c
@@ -244,6 +244,7 @@ virSecurityManagerPostFork(virSecurityManager *mgr)
/**
* virSecurityManagerTransactionStart:
* @mgr: security manager
+ * @sharedFilesystems: list of filesystem to consider shared
*
* Starts a new transaction. In transaction nothing is changed security
* label until virSecurityManagerTransactionCommit() is called.
@@ -252,14 +253,15 @@ virSecurityManagerPostFork(virSecurityManager *mgr)
* -1 otherwise.
*/
int
-virSecurityManagerTransactionStart(virSecurityManager *mgr)
+virSecurityManagerTransactionStart(virSecurityManager *mgr,
+ char *const *sharedFilesystems)
{
VIR_LOCK_GUARD lock = virObjectLockGuard(mgr);
if (!mgr->drv->transactionStart)
return 0;
- return mgr->drv->transactionStart(mgr);
+ return mgr->drv->transactionStart(mgr, sharedFilesystems);
}
@@ -402,6 +404,7 @@ virSecurityManagerGetPrivileged(virSecurityManager *mgr)
/**
* virSecurityManagerRestoreImageLabel:
* @mgr: security manager object
+ * @sharedFilesystems: list of filesystem to consider shared
* @vm: domain definition object
* @src: disk source definition to operate on
* @flags: bitwise or of 'virSecurityDomainImageLabelFlags'
@@ -412,6 +415,7 @@ virSecurityManagerGetPrivileged(virSecurityManager *mgr)
*/
int
virSecurityManagerRestoreImageLabel(virSecurityManager *mgr,
+ char *const *sharedFilesystems,
virDomainDef *vm,
virStorageSource *src,
virSecurityDomainImageLabelFlags flags)
@@ -423,13 +427,15 @@ virSecurityManagerRestoreImageLabel(virSecurityManager *mgr,
return -1;
}
- return mgr->drv->domainRestoreSecurityImageLabel(mgr, vm, src, flags);
+ return mgr->drv->domainRestoreSecurityImageLabel(mgr, sharedFilesystems,
+ vm, src, flags);
}
/**
* virSecurityManagerMoveImageMetadata:
* @mgr: security manager
+ * @sharedFilesystems: list of filesystem to consider shared
* @pid: domain's PID
* @src: source of metadata
* @dst: destination to move metadata to
@@ -449,6 +455,7 @@ virSecurityManagerRestoreImageLabel(virSecurityManager *mgr,
*/
int
virSecurityManagerMoveImageMetadata(virSecurityManager *mgr,
+ char *const *sharedFilesystems,
pid_t pid,
virStorageSource *src,
virStorageSource *dst)
@@ -458,7 +465,8 @@ virSecurityManagerMoveImageMetadata(virSecurityManager *mgr,
if (!mgr->drv->domainMoveImageMetadata)
return 0;
- return mgr->drv->domainMoveImageMetadata(mgr, pid, src, dst);
+ return mgr->drv->domainMoveImageMetadata(mgr, sharedFilesystems,
+ pid, src, dst);
}
@@ -510,6 +518,7 @@ virSecurityManagerClearSocketLabel(virSecurityManager *mgr,
/**
* virSecurityManagerSetImageLabel:
* @mgr: security manager object
+ * @sharedFilesystems: list of filesystem to consider shared
* @vm: domain definition object
* @src: disk source definition to operate on
* @flags: bitwise or of 'virSecurityDomainImageLabelFlags'
@@ -520,6 +529,7 @@ virSecurityManagerClearSocketLabel(virSecurityManager *mgr,
*/
int
virSecurityManagerSetImageLabel(virSecurityManager *mgr,
+ char *const *sharedFilesystems,
virDomainDef *vm,
virStorageSource *src,
virSecurityDomainImageLabelFlags flags)
@@ -531,7 +541,8 @@ virSecurityManagerSetImageLabel(virSecurityManager *mgr,
return -1;
}
- return mgr->drv->domainSetSecurityImageLabel(mgr, vm, src, flags);
+ return mgr->drv->domainSetSecurityImageLabel(mgr, sharedFilesystems,
+ vm, src, flags);
}
@@ -816,6 +827,7 @@ int virSecurityManagerCheckAllLabel(virSecurityManager *mgr,
int
virSecurityManagerSetAllLabel(virSecurityManager *mgr,
+ char *const *sharedFilesystems,
virDomainDef *vm,
const char *incomingPath,
bool chardevStdioLogd,
@@ -828,13 +840,15 @@ virSecurityManagerSetAllLabel(virSecurityManager *mgr,
return -1;
}
- return mgr->drv->domainSetSecurityAllLabel(mgr, vm, incomingPath,
+ return mgr->drv->domainSetSecurityAllLabel(mgr, sharedFilesystems,
+ vm, incomingPath,
chardevStdioLogd, migrated);
}
int
virSecurityManagerRestoreAllLabel(virSecurityManager *mgr,
+ char *const *sharedFilesystems,
virDomainDef *vm,
bool migrated,
bool chardevStdioLogd)
@@ -846,7 +860,8 @@ virSecurityManagerRestoreAllLabel(virSecurityManager *mgr,
return -1;
}
- return mgr->drv->domainRestoreSecurityAllLabel(mgr, vm, migrated,
+ return mgr->drv->domainRestoreSecurityAllLabel(mgr, sharedFilesystems,
+ vm, migrated,
chardevStdioLogd);
}
@@ -1270,6 +1285,7 @@ cmpstringp(const void *p1,
/**
* virSecurityManagerMetadataLock:
* @mgr: security manager object
+ * @sharedFilesystems: list of filesystem to consider shared
* @paths: paths to lock
* @npaths: number of items in @paths array
*
@@ -1285,6 +1301,7 @@ cmpstringp(const void *p1,
*/
virSecurityManagerMetadataLockState *
virSecurityManagerMetadataLock(virSecurityManager *mgr G_GNUC_UNUSED,
+ char *const *sharedFilesystems,
const char **paths,
size_t npaths)
{
@@ -1355,7 +1372,7 @@ virSecurityManagerMetadataLock(virSecurityManager *mgr
G_GNUC_UNUSED,
}
#endif /* !WIN32 */
- if (virFileIsSharedFS(p)) {
+ if (virFileIsSharedFS(p, sharedFilesystems)) {
/* Probably a root squashed NFS. */
continue;
}
diff --git a/src/security/security_manager.h b/src/security/security_manager.h
index a416af3215..c622fe5882 100644
--- a/src/security/security_manager.h
+++ b/src/security/security_manager.h
@@ -81,7 +81,8 @@ virSecurityManager *virSecurityManagerNewDAC(const char *virtDriver,
int virSecurityManagerPreFork(virSecurityManager *mgr);
void virSecurityManagerPostFork(virSecurityManager *mgr);
-int virSecurityManagerTransactionStart(virSecurityManager *mgr);
+int virSecurityManagerTransactionStart(virSecurityManager *mgr,
+ char *const *sharedFilesystems);
int virSecurityManagerTransactionCommit(virSecurityManager *mgr,
pid_t pid,
bool lock);
@@ -129,11 +130,13 @@ int virSecurityManagerReleaseLabel(virSecurityManager *mgr,
int virSecurityManagerCheckAllLabel(virSecurityManager *mgr,
virDomainDef *sec);
int virSecurityManagerSetAllLabel(virSecurityManager *mgr,
+ char *const *sharedFilesystems,
virDomainDef *sec,
const char *incomingPath,
bool chardevStdioLogd,
bool migrated);
int virSecurityManagerRestoreAllLabel(virSecurityManager *mgr,
+ char *const *sharedFilesystems,
virDomainDef *def,
bool migrated,
bool chardevStdioLogd);
@@ -168,14 +171,17 @@ typedef enum {
} virSecurityDomainImageLabelFlags;
int virSecurityManagerSetImageLabel(virSecurityManager *mgr,
+ char *const *sharedFilesystems,
virDomainDef *vm,
virStorageSource *src,
virSecurityDomainImageLabelFlags flags);
int virSecurityManagerRestoreImageLabel(virSecurityManager *mgr,
+ char *const *sharedFilesystems,
virDomainDef *vm,
virStorageSource *src,
virSecurityDomainImageLabelFlags flags);
int virSecurityManagerMoveImageMetadata(virSecurityManager *mgr,
+ char *const *sharedFilesystems,
pid_t pid,
virStorageSource *src,
virStorageSource *dst);
@@ -244,6 +250,7 @@ struct _virSecurityManagerMetadataLockState {
virSecurityManagerMetadataLockState *
virSecurityManagerMetadataLock(virSecurityManager *mgr,
+ char *const *sharedFilesystems,
const char **paths,
size_t npaths);
diff --git a/src/security/security_nop.c b/src/security/security_nop.c
index 1413f43d57..e6e337a49d 100644
--- a/src/security/security_nop.c
+++ b/src/security/security_nop.c
@@ -116,6 +116,7 @@ virSecurityDomainReleaseLabelNop(virSecurityManager *mgr
G_GNUC_UNUSED,
static int
virSecurityDomainSetAllLabelNop(virSecurityManager *mgr G_GNUC_UNUSED,
+ char *const *sharedFilesystems G_GNUC_UNUSED,
virDomainDef *sec G_GNUC_UNUSED,
const char *incomingPath G_GNUC_UNUSED,
bool chardevStdioLogd G_GNUC_UNUSED,
@@ -126,6 +127,7 @@ virSecurityDomainSetAllLabelNop(virSecurityManager *mgr
G_GNUC_UNUSED,
static int
virSecurityDomainRestoreAllLabelNop(virSecurityManager *mgr G_GNUC_UNUSED,
+ char *const *sharedFilesystems G_GNUC_UNUSED,
virDomainDef *vm G_GNUC_UNUSED,
bool migrated G_GNUC_UNUSED,
bool chardevStdioLogd G_GNUC_UNUSED)
@@ -189,6 +191,7 @@ virSecurityGetBaseLabel(virSecurityManager *mgr G_GNUC_UNUSED,
static int
virSecurityDomainRestoreImageLabelNop(virSecurityManager *mgr G_GNUC_UNUSED,
+ char *const *sharedFilesystems G_GNUC_UNUSED,
virDomainDef *def G_GNUC_UNUSED,
virStorageSource *src G_GNUC_UNUSED,
virSecurityDomainImageLabelFlags flags
G_GNUC_UNUSED)
@@ -198,6 +201,7 @@ virSecurityDomainRestoreImageLabelNop(virSecurityManager *mgr
G_GNUC_UNUSED,
static int
virSecurityDomainSetImageLabelNop(virSecurityManager *mgr G_GNUC_UNUSED,
+ char *const *sharedFilesystems G_GNUC_UNUSED,
virDomainDef *def G_GNUC_UNUSED,
virStorageSource *src G_GNUC_UNUSED,
virSecurityDomainImageLabelFlags flags G_GNUC_UNUSED)
@@ -207,6 +211,7 @@ virSecurityDomainSetImageLabelNop(virSecurityManager *mgr
G_GNUC_UNUSED,
static int
virSecurityDomainMoveImageMetadataNop(virSecurityManager *mgr G_GNUC_UNUSED,
+ char *const *sharedFilesystems G_GNUC_UNUSED,
pid_t pid G_GNUC_UNUSED,
virStorageSource *src G_GNUC_UNUSED,
virStorageSource *dst G_GNUC_UNUSED)
diff --git a/src/security/security_selinux.c b/src/security/security_selinux.c
index a4915dbc89..4f1874644f 100644
--- a/src/security/security_selinux.c
+++ b/src/security/security_selinux.c
@@ -77,6 +77,7 @@ struct _virSecuritySELinuxContextItem {
typedef struct _virSecuritySELinuxContextList virSecuritySELinuxContextList;
struct _virSecuritySELinuxContextList {
virSecurityManager *manager;
+ char **sharedFilesystems;
virSecuritySELinuxContextItem **items;
size_t nItems;
bool lock;
@@ -141,6 +142,7 @@ virSecuritySELinuxContextListFree(void *opaque)
g_free(list->items);
virObjectUnref(list->manager);
+ g_strfreev(list->sharedFilesystems);
g_free(list);
}
@@ -254,7 +256,9 @@ virSecuritySELinuxTransactionRun(pid_t pid G_GNUC_UNUSED,
VIR_APPEND_ELEMENT_COPY_INPLACE(paths, npaths, p);
}
- if (!(state = virSecurityManagerMetadataLock(list->manager, paths, npaths)))
+ if (!(state = virSecurityManagerMetadataLock(list->manager,
+ list->sharedFilesystems,
+ paths, npaths)))
goto cleanup;
for (i = 0; i < list->nItems; i++) {
@@ -1102,6 +1106,7 @@ virSecuritySELinuxGetDOI(virSecurityManager *mgr G_GNUC_UNUSED)
/**
* virSecuritySELinuxTransactionStart:
* @mgr: security manager
+ * @sharedFilesystems: list of filesystem to consider shared
*
* Starts a new transaction. In transaction nothing is changed context
* until TransactionCommit() is called. This is implemented as a list
@@ -1114,7 +1119,8 @@ virSecuritySELinuxGetDOI(virSecurityManager *mgr G_GNUC_UNUSED)
* -1 otherwise.
*/
static int
-virSecuritySELinuxTransactionStart(virSecurityManager *mgr)
+virSecuritySELinuxTransactionStart(virSecurityManager *mgr,
+ char *const *sharedFilesystems)
{
virSecuritySELinuxContextList *list;
@@ -1128,6 +1134,7 @@ virSecuritySELinuxTransactionStart(virSecurityManager *mgr)
list = g_new0(virSecuritySELinuxContextList, 1);
list->manager = virObjectRef(mgr);
+ list->sharedFilesystems = g_strdupv((char **) sharedFilesystems);
if (virThreadLocalSet(&contextList, list) < 0) {
virReportSystemError(errno, "%s",
@@ -1777,6 +1784,7 @@ virSecuritySELinuxRestoreTPMFileLabelInt(virSecurityManager *mgr,
static int
virSecuritySELinuxRestoreImageLabelInt(virSecurityManager *mgr,
+ char *const *sharedFilesystems,
virDomainDef *def,
virStorageSource *src,
bool migrated)
@@ -1835,7 +1843,7 @@ virSecuritySELinuxRestoreImageLabelInt(virSecurityManager *mgr,
if (!src->path)
return 0;
- if ((rc = virFileIsSharedFS(src->path)) < 0)
+ if ((rc = virFileIsSharedFS(src->path, sharedFilesystems)) < 0)
return -1;
}
@@ -1867,16 +1875,19 @@ virSecuritySELinuxRestoreImageLabelInt(virSecurityManager *mgr,
static int
virSecuritySELinuxRestoreImageLabel(virSecurityManager *mgr,
+ char *const *sharedFilesystems,
virDomainDef *def,
virStorageSource *src,
virSecurityDomainImageLabelFlags flags
G_GNUC_UNUSED)
{
- return virSecuritySELinuxRestoreImageLabelInt(mgr, def, src, false);
+ return virSecuritySELinuxRestoreImageLabelInt(mgr, sharedFilesystems,
+ def, src, false);
}
static int
virSecuritySELinuxSetImageLabelInternal(virSecurityManager *mgr,
+ char *const *sharedFilesystems G_GNUC_UNUSED,
virDomainDef *def,
virStorageSource *src,
virStorageSource *parent,
@@ -1983,6 +1994,7 @@ virSecuritySELinuxSetImageLabelInternal(virSecurityManager *mgr,
static int
virSecuritySELinuxSetImageLabel(virSecurityManager *mgr,
+ char *const *sharedFilesystems,
virDomainDef *def,
virStorageSource *src,
virSecurityDomainImageLabelFlags flags)
@@ -1993,7 +2005,9 @@ virSecuritySELinuxSetImageLabel(virSecurityManager *mgr,
for (n = src; virStorageSourceIsBacking(n); n = n->backingStore) {
const bool isChainTop = flags & VIR_SECURITY_DOMAIN_IMAGE_PARENT_CHAIN_TOP;
- if (virSecuritySELinuxSetImageLabelInternal(mgr, def, n, parent, isChainTop) <
0)
+ if (virSecuritySELinuxSetImageLabelInternal(mgr, sharedFilesystems,
+ def, n, parent,
+ isChainTop) < 0)
return -1;
if (!(flags & VIR_SECURITY_DOMAIN_IMAGE_LABEL_BACKING_CHAIN))
@@ -2008,6 +2022,7 @@ virSecuritySELinuxSetImageLabel(virSecurityManager *mgr,
struct virSecuritySELinuxMoveImageMetadataData {
virSecurityManager *mgr;
+ char **sharedFilesystems;
const char *src;
const char *dst;
};
@@ -2022,7 +2037,9 @@ virSecuritySELinuxMoveImageMetadataHelper(pid_t pid G_GNUC_UNUSED,
virSecurityManagerMetadataLockState *state;
int ret;
- if (!(state = virSecurityManagerMetadataLock(data->mgr, paths,
G_N_ELEMENTS(paths))))
+ if (!(state = virSecurityManagerMetadataLock(data->mgr,
+ data->sharedFilesystems,
+ paths, G_N_ELEMENTS(paths))))
return -1;
ret = virSecurityMoveRememberedLabel(SECURITY_SELINUX_NAME, data->src,
data->dst);
@@ -2039,11 +2056,16 @@ virSecuritySELinuxMoveImageMetadataHelper(pid_t pid
G_GNUC_UNUSED,
static int
virSecuritySELinuxMoveImageMetadata(virSecurityManager *mgr,
+ char *const *sharedFilesystems,
pid_t pid,
virStorageSource *src,
virStorageSource *dst)
{
- struct virSecuritySELinuxMoveImageMetadataData data = { .mgr = mgr, 0 };
+ struct virSecuritySELinuxMoveImageMetadataData data = {
+ .mgr = mgr,
+ .sharedFilesystems = (char **) sharedFilesystems,
+ 0
+ };
int rc;
if (src && virStorageSourceIsLocalStorage(src))
@@ -2820,6 +2842,7 @@ virSecuritySELinuxRestoreSysinfoLabel(virSecurityManager *mgr,
static int
virSecuritySELinuxRestoreAllLabel(virSecurityManager *mgr,
+ char *const *sharedFilesystems,
virDomainDef *def,
bool migrated,
bool chardevStdioLogd)
@@ -2844,7 +2867,8 @@ virSecuritySELinuxRestoreAllLabel(virSecurityManager *mgr,
for (i = 0; i < def->ndisks; i++) {
virDomainDiskDef *disk = def->disks[i];
- if (virSecuritySELinuxRestoreImageLabelInt(mgr, def, disk->src,
+ if (virSecuritySELinuxRestoreImageLabelInt(mgr, sharedFilesystems,
+ def, disk->src,
migrated) < 0)
rc = -1;
}
@@ -2890,7 +2914,8 @@ virSecuritySELinuxRestoreAllLabel(virSecurityManager *mgr,
}
if (def->os.loader && def->os.loader->nvram) {
- if (virSecuritySELinuxRestoreImageLabelInt(mgr, def,
def->os.loader->nvram,
+ if (virSecuritySELinuxRestoreImageLabelInt(mgr, sharedFilesystems,
+ def, def->os.loader->nvram,
migrated) < 0)
rc = -1;
}
@@ -3232,6 +3257,7 @@ virSecuritySELinuxSetSysinfoLabel(virSecurityManager *mgr,
static int
virSecuritySELinuxSetAllLabel(virSecurityManager *mgr,
+ char *const *sharedFilesystems,
virDomainDef *def,
const char *incomingPath G_GNUC_UNUSED,
bool chardevStdioLogd,
@@ -3259,7 +3285,8 @@ virSecuritySELinuxSetAllLabel(virSecurityManager *mgr,
def->disks[i]->dst);
continue;
}
- if (virSecuritySELinuxSetImageLabel(mgr, def, def->disks[i]->src,
+ if (virSecuritySELinuxSetImageLabel(mgr, sharedFilesystems,
+ def, def->disks[i]->src,
VIR_SECURITY_DOMAIN_IMAGE_LABEL_BACKING_CHAIN
|
VIR_SECURITY_DOMAIN_IMAGE_PARENT_CHAIN_TOP)
< 0)
return -1;
@@ -3309,7 +3336,8 @@ virSecuritySELinuxSetAllLabel(virSecurityManager *mgr,
}
if (def->os.loader && def->os.loader->nvram) {
- if (virSecuritySELinuxSetImageLabel(mgr, def, def->os.loader->nvram,
+ if (virSecuritySELinuxSetImageLabel(mgr, sharedFilesystems,
+ def, def->os.loader->nvram,
VIR_SECURITY_DOMAIN_IMAGE_LABEL_BACKING_CHAIN
|
VIR_SECURITY_DOMAIN_IMAGE_PARENT_CHAIN_TOP)
< 0)
return -1;
diff --git a/src/security/security_stack.c b/src/security/security_stack.c
index 369b5dd3a6..11800535b9 100644
--- a/src/security/security_stack.c
+++ b/src/security/security_stack.c
@@ -140,13 +140,15 @@ virSecurityStackPreFork(virSecurityManager *mgr)
static int
-virSecurityStackTransactionStart(virSecurityManager *mgr)
+virSecurityStackTransactionStart(virSecurityManager *mgr,
+ char *const *sharedFilesystems)
{
virSecurityStackData *priv = virSecurityManagerGetPrivateData(mgr);
virSecurityStackItem *item = priv->itemsHead;
for (; item; item = item->next) {
- if (virSecurityManagerTransactionStart(item->securityManager) < 0)
+ if (virSecurityManagerTransactionStart(item->securityManager,
+ sharedFilesystems) < 0)
goto rollback;
}
@@ -337,6 +339,7 @@ virSecurityStackRestoreHostdevLabel(virSecurityManager *mgr,
static int
virSecurityStackSetAllLabel(virSecurityManager *mgr,
+ char *const *sharedFilesystems,
virDomainDef *vm,
const char *incomingPath,
bool chardevStdioLogd,
@@ -346,8 +349,9 @@ virSecurityStackSetAllLabel(virSecurityManager *mgr,
virSecurityStackItem *item = priv->itemsHead;
for (; item; item = item->next) {
- if (virSecurityManagerSetAllLabel(item->securityManager, vm,
- incomingPath, chardevStdioLogd,
+ if (virSecurityManagerSetAllLabel(item->securityManager,
+ sharedFilesystems,
+ vm, incomingPath, chardevStdioLogd,
migrated) < 0)
goto rollback;
}
@@ -357,6 +361,7 @@ virSecurityStackSetAllLabel(virSecurityManager *mgr,
rollback:
for (item = item->prev; item; item = item->prev) {
if (virSecurityManagerRestoreAllLabel(item->securityManager,
+ sharedFilesystems,
vm,
migrated,
chardevStdioLogd) < 0) {
@@ -373,6 +378,7 @@ virSecurityStackSetAllLabel(virSecurityManager *mgr,
static int
virSecurityStackRestoreAllLabel(virSecurityManager *mgr,
+ char *const *sharedFilesystems,
virDomainDef *vm,
bool migrated,
bool chardevStdioLogd)
@@ -382,8 +388,11 @@ virSecurityStackRestoreAllLabel(virSecurityManager *mgr,
int rc = 0;
for (; item; item = item->next) {
- if (virSecurityManagerRestoreAllLabel(item->securityManager, vm,
- migrated, chardevStdioLogd) < 0)
+ if (virSecurityManagerRestoreAllLabel(item->securityManager,
+ sharedFilesystems,
+ vm,
+ migrated,
+ chardevStdioLogd) < 0)
rc = -1;
}
@@ -638,6 +647,7 @@ virSecurityStackGetBaseLabel(virSecurityManager *mgr, int virtType)
static int
virSecurityStackSetImageLabel(virSecurityManager *mgr,
+ char *const *sharedFilesystems,
virDomainDef *vm,
virStorageSource *src,
virSecurityDomainImageLabelFlags flags)
@@ -646,8 +656,9 @@ virSecurityStackSetImageLabel(virSecurityManager *mgr,
virSecurityStackItem *item = priv->itemsHead;
for (; item; item = item->next) {
- if (virSecurityManagerSetImageLabel(item->securityManager, vm, src,
- flags) < 0)
+ if (virSecurityManagerSetImageLabel(item->securityManager,
+ sharedFilesystems,
+ vm, src, flags) < 0)
goto rollback;
}
@@ -656,6 +667,7 @@ virSecurityStackSetImageLabel(virSecurityManager *mgr,
rollback:
for (item = item->prev; item; item = item->prev) {
if (virSecurityManagerRestoreImageLabel(item->securityManager,
+ sharedFilesystems,
vm,
src,
flags) < 0) {
@@ -672,6 +684,7 @@ virSecurityStackSetImageLabel(virSecurityManager *mgr,
static int
virSecurityStackRestoreImageLabel(virSecurityManager *mgr,
+ char *const *sharedFilesystems,
virDomainDef *vm,
virStorageSource *src,
virSecurityDomainImageLabelFlags flags)
@@ -682,6 +695,7 @@ virSecurityStackRestoreImageLabel(virSecurityManager *mgr,
for (; item; item = item->next) {
if (virSecurityManagerRestoreImageLabel(item->securityManager,
+ sharedFilesystems,
vm, src, flags) < 0)
rc = -1;
}
@@ -691,6 +705,7 @@ virSecurityStackRestoreImageLabel(virSecurityManager *mgr,
static int
virSecurityStackMoveImageMetadata(virSecurityManager *mgr,
+ char *const *sharedFilesystems,
pid_t pid,
virStorageSource *src,
virStorageSource *dst)
@@ -701,6 +716,7 @@ virSecurityStackMoveImageMetadata(virSecurityManager *mgr,
for (; item; item = item->next) {
if (virSecurityManagerMoveImageMetadata(item->securityManager,
+ sharedFilesystems,
pid, src, dst) < 0)
rc = -1;
}
diff --git a/src/util/virfile.c b/src/util/virfile.c
index deaf4555fd..3268866f8b 100644
--- a/src/util/virfile.c
+++ b/src/util/virfile.c
@@ -2597,8 +2597,14 @@ virFileOpenAs(const char *path, int openflags, mode_t mode,
goto error;
/* On Linux we can also verify the FS-type of the
- * directory. (this is a NOP on other platforms). */
- if (virFileIsSharedFS(path) <= 0)
+ * directory. (this is a NOP on other platforms).
+ *
+ * Note that it would be pointless to pass
+ * virQEMUDriverConfig.sharedFilesystems here, since those
+ * listed there are by definition paths that can be accessed
+ * as local from the current host. Thus, a second attempt at
+ * opening the file would not make a difference */
+ if (virFileIsSharedFS(path, NULL) <= 0)
goto error;
}
@@ -3795,7 +3801,8 @@ virFileGetDefaultHugepage(virHugeTLBFS *fs,
return NULL;
}
-int virFileIsSharedFS(const char *path)
+int virFileIsSharedFS(const char *path,
+ char *const *overrides G_GNUC_UNUSED)
{
return virFileIsSharedFSType(path,
VIR_FILE_SHFS_NFS |
diff --git a/src/util/virfile.h b/src/util/virfile.h
index 56fe309bce..3fdd7f526c 100644
--- a/src/util/virfile.h
+++ b/src/util/virfile.h
@@ -235,7 +235,8 @@ enum {
};
int virFileIsSharedFSType(const char *path, unsigned int fstypes) ATTRIBUTE_NONNULL(1);
-int virFileIsSharedFS(const char *path) ATTRIBUTE_NONNULL(1);
+int virFileIsSharedFS(const char *path,
+ char *const *overrides) ATTRIBUTE_NONNULL(1);
int virFileIsClusterFS(const char *path) ATTRIBUTE_NONNULL(1);
int virFileIsMountPoint(const char *file) ATTRIBUTE_NONNULL(1);
int virFileIsCDROM(const char *path)
diff --git a/tests/securityselinuxlabeltest.c b/tests/securityselinuxlabeltest.c
index 7b7cf53569..43db128b3a 100644
--- a/tests/securityselinuxlabeltest.c
+++ b/tests/securityselinuxlabeltest.c
@@ -270,7 +270,7 @@ testSELinuxLabeling(const void *opaque)
if (!(def = testSELinuxLoadDef(testname)))
goto cleanup;
- if (virSecurityManagerSetAllLabel(mgr, def, NULL, false, false) < 0)
+ if (virSecurityManagerSetAllLabel(mgr, NULL, def, NULL, false, false) < 0)
goto cleanup;
if (testSELinuxCheckLabels(files, nfiles) < 0)
diff --git a/tests/virfiletest.c b/tests/virfiletest.c
index 9fbfc37e56..e05925a321 100644
--- a/tests/virfiletest.c
+++ b/tests/virfiletest.c
@@ -313,7 +313,7 @@ testFileIsSharedFSType(const void *opaque G_GNUC_UNUSED)
goto cleanup;
}
- actual = virFileIsSharedFS(data->filename);
+ actual = virFileIsSharedFS(data->filename, NULL);
if (actual != data->expected) {
fprintf(stderr, "Unexpected FS type. Expected %d got %d\n",
--
2.44.0
12:18 p.m.
New subject: [PATCH v2 3/5] qemu: Propagate shared_filesystems
On 4/17/24 09:29, Andrea Bolognani wrote:
virFileIsSharedFS() is the function that ultimately decides
whether a filesystem should be considered shared, but the list
of manually configured shared filesystems is part of the QEMU
driver's configuration, so we need to pass the information
through several layers in order to make use of it.
Note that with this change the list is propagated all the way
through, but its contents are still ignored, so the behavior
remains the same for now.
Signed-off-by: Andrea Bolognani <abologna(a)redhat.com>
Reviewed-by: Stefan Berger <stefanb(a)linux.ibm.com>
8:29 a.m.
New subject: [PATCH v2 4/5] utils: Use overrides in virFileIsSharedFS()
If the local admin has explicitly declared that a certain
filesystem is to be considered shared, we should treat it as
such.
Signed-off-by: Andrea Bolognani <abologna(a)redhat.com>
---
src/util/virfile.c | 42 +++++++++++++++++++++++++++++++++++++++++-
1 file changed, 41 insertions(+), 1 deletion(-)
diff --git a/src/util/virfile.c b/src/util/virfile.c
index 3268866f8b..45815919d6 100644
--- a/src/util/virfile.c
+++ b/src/util/virfile.c
@@ -3801,9 +3801,49 @@ virFileGetDefaultHugepage(virHugeTLBFS *fs,
return NULL;
}
+static bool
+virFileIsSharedFSOverride(const char *path,
+ char *const *overrides)
+{
+ g_autofree char *dirpath = NULL;
+ char *p = NULL;
+
+ if (!path || path[0] != '/' || !overrides)
+ return false;
+
+ if (g_strv_contains((const char *const *) overrides, path))
+ return true;
+
+ dirpath = g_strdup(path);
+
+ /* Continue until we've scanned the entire path */
+ while (p != dirpath) {
+
+ /* Find the last slash */
+ if ((p = strrchr(dirpath, '/')) == NULL)
+ break;
+
+ /* Truncate the path by overwriting the slash that we've just
+ * found with a null byte. If it is the very first slash in
+ * the path, we need to handle things slightly differently */
+ if (p == dirpath)
+ *(p+1) = '\0';
+ else
+ *p = '\0';
+
+ if (g_strv_contains((const char *const *) overrides, dirpath))
+ return true;
+ }
+
+ return false;
+}
+
int virFileIsSharedFS(const char *path,
- char *const *overrides G_GNUC_UNUSED)
+ char *const *overrides)
{
+ if (virFileIsSharedFSOverride(path, overrides))
+ return 1;
+
return virFileIsSharedFSType(path,
VIR_FILE_SHFS_NFS |
VIR_FILE_SHFS_GFS2 |
--
2.44.0
12:17 p.m.
New subject: [PATCH v2 4/5] utils: Use overrides in virFileIsSharedFS()
On 4/17/24 09:29, Andrea Bolognani wrote:
If the local admin has explicitly declared that a certain
filesystem is to be considered shared, we should treat it as
such.
Signed-off-by: Andrea Bolognani <abologna(a)redhat.com>
---
src/util/virfile.c | 42 +++++++++++++++++++++++++++++++++++++++++-
1 file changed, 41 insertions(+), 1 deletion(-)
diff --git a/src/util/virfile.c b/src/util/virfile.c
index 3268866f8b..45815919d6 100644
--- a/src/util/virfile.c
+++ b/src/util/virfile.c
@@ -3801,9 +3801,49 @@ virFileGetDefaultHugepage(virHugeTLBFS *fs,
return NULL;
}
+static bool
+virFileIsSharedFSOverride(const char *path,
+ char *const *overrides)
+{
+ g_autofree char *dirpath = NULL;
+ char *p = NULL;
+
+ if (!path || path[0] != '/' || !overrides)
+ return false;
+
+ if (g_strv_contains((const char *const *) overrides, path))
+ return true;
+
+ dirpath = g_strdup(path);
+
+ /* Continue until we've scanned the entire path */
+ while (p != dirpath) {
+
+ /* Find the last slash */
+ if ((p = strrchr(dirpath, '/')) == NULL)
+ break;
+
+ /* Truncate the path by overwriting the slash that we've just
+ * found with a null byte. If it is the very first slash in
+ * the path, we need to handle things slightly differently */
+ if (p == dirpath)
+ *(p+1) = '\0';
+ else
+ *p = '\0';
When admins declare a path as shared they must omit the trailing '/'
then. It may be wroth mentioning this in 2/5.
Reviewed-by: Stefan Berger <stefanb(a)linux.ibm.com>
> +
> + if (g_strv_contains((const char *const *) overrides, dirpath))
> + return true;
> + }
> +
> + return false;
> +}
> +
> int virFileIsSharedFS(const char *path,
> - char *const *overrides G_GNUC_UNUSED)
> + char *const *overrides)
> {
> + if (virFileIsSharedFSOverride(path, overrides))
> + return 1;
> +
> return virFileIsSharedFSType(path,
> VIR_FILE_SHFS_NFS |
> VIR_FILE_SHFS_GFS2 |
11:16 a.m.
New subject: [PATCH v2 4/5] utils: Use overrides in virFileIsSharedFS()
On Thu, Apr 18, 2024 at 01:17:34PM GMT, Stefan Berger wrote:
On 4/17/24 09:29, Andrea Bolognani wrote:
> +static bool
> +virFileIsSharedFSOverride(const char *path,
> + char *const *overrides)
> +{
> + g_autofree char *dirpath = NULL;
> + char *p = NULL;
> +
> + if (!path || path[0] != '/' || !overrides)
> + return false;
> +
> + if (g_strv_contains((const char *const *) overrides, path))
> + return true;
> +
> + dirpath = g_strdup(path);
> +
> + /* Continue until we've scanned the entire path */
> + while (p != dirpath) {
> +
> + /* Find the last slash */
> + if ((p = strrchr(dirpath, '/')) == NULL)
> + break;
> +
> + /* Truncate the path by overwriting the slash that we've just
> + * found with a null byte. If it is the very first slash in
> + * the path, we need to handle things slightly differently */
> + if (p == dirpath)
> + *(p+1) = '\0';
> + else
> + *p = '\0';
When admins declare a path as shared they must omit the trailing '/' then.
It may be wroth mentioning this in 2/5.
Very good catch!
It's fairly easy, and certainly much more user-friendly, to remove
trailing slashes when parsing the configuration file instead. I'll
have that in the next respin.
--
Andrea Bolognani / Red Hat / Virtualization
12:42 p.m.
New subject: [PATCH v2 4/5] utils: Use overrides in virFileIsSharedFS()
On Thu, May 02, 2024 at 12:16:32PM GMT, Andrea Bolognani wrote:
On Thu, Apr 18, 2024 at 01:17:34PM GMT, Stefan Berger wrote:
> On 4/17/24 09:29, Andrea Bolognani wrote:
> > +static bool
> > +virFileIsSharedFSOverride(const char *path,
> > + char *const *overrides)
> > +{
> > + g_autofree char *dirpath = NULL;
> > + char *p = NULL;
> > +
> > + if (!path || path[0] != '/' || !overrides)
> > + return false;
> > +
> > + if (g_strv_contains((const char *const *) overrides, path))
> > + return true;
> > +
> > + dirpath = g_strdup(path);
> > +
> > + /* Continue until we've scanned the entire path */
> > + while (p != dirpath) {
> > +
> > + /* Find the last slash */
> > + if ((p = strrchr(dirpath, '/')) == NULL)
> > + break;
> > +
> > + /* Truncate the path by overwriting the slash that we've just
> > + * found with a null byte. If it is the very first slash in
> > + * the path, we need to handle things slightly differently */
> > + if (p == dirpath)
> > + *(p+1) = '\0';
> > + else
> > + *p = '\0';
>
> When admins declare a path as shared they must omit the trailing '/' then.
> It may be wroth mentioning this in 2/5.
Very good catch!
It's fairly easy, and certainly much more user-friendly, to remove
trailing slashes when parsing the configuration file instead. I'll
have that in the next respin.
v3 here:
https://lists.libvirt.org/archives/list/devel@lists.libvirt.org/thread/PI...
I have not CC'd you this time around to avoid unnecessary noise in
your inbox.
--
Andrea Bolognani / Red Hat / Virtualization
8:29 a.m.
New subject: [PATCH v2 5/5] qemu: Always set labels for TPM state
Up until this point, we have avoided setting labels for
incoming migration when the TPM state is stored on a shared
filesystem. This seems to make sense, because since the
underlying storage is shared surely the labels will be as
well.
There's one problem, though: when a guest is migrated, the
SELinux context for the destination process is different from
the one of the source process.
We haven't hit any issues with the current approach so far
because NFS doesn't support SELinux, so effectively it doesn't
matter whether relabeling happens or not: even if the SELinux
contexts of the source and target processes are different,
both will be able to access the storage.
Now that it's possible for the local admin to manually mark
exported directories as shared filesystems, however, things
can get problematic.
Consider the case in which one host (mig-one) exports its
local filesystem /srv/nfs/libvirt/swtpm via NFS, and at the
same time bind-mounts it to /var/lib/libvirt/swtpm; another
host (mig-two) mounts the same filesystem to the same
location, this time via NFS. Additionally, in order to
allow migration in both directions, on mig-one the
/var/lib/libvirt/swtpm directory is listed in the
shared_filesystems qemu.conf option.
When migrating from mig-one to mig-two, things work just fine;
going in the opposite direction, however, results in an error:
# virsh migrate cirros qemu+ssh://mig-one/system
error: internal error: QEMU unexpectedly closed the monitor (vm='cirros'):
qemu-system-x86_64: tpm-emulator: Setting the stateblob (type 1) failed with a TPM error
0x1f
qemu-system-x86_64: error while loading state for instance 0x0 of device
'tpm-emulator'
qemu-system-x86_64: load of migration failed: Input/output error
This is because the directory on mig-one is considered a
shared filesystem and thus labeling is skipped, resulting in
a SELinux denial.
The solution is quite simple: remove the check and always
relabel. We know that it's okay to do so not just because it
makes the error seen above go away, but also because no such
check currently exists for disks and other types of persistent
storage such as NVRAM files, which always get relabeled.
Signed-off-by: Andrea Bolognani <abologna(a)redhat.com>
---
src/qemu/qemu_tpm.c | 11 ++---------
1 file changed, 2 insertions(+), 9 deletions(-)
diff --git a/src/qemu/qemu_tpm.c b/src/qemu/qemu_tpm.c
index cdf4bfbad2..e5a9fb8b16 100644
--- a/src/qemu/qemu_tpm.c
+++ b/src/qemu/qemu_tpm.c
@@ -929,7 +929,6 @@ qemuTPMEmulatorStart(virQEMUDriver *driver,
g_autofree char *pidfile = NULL;
virTimeBackOffVar timebackoff;
const unsigned long long timeout = 1000; /* ms */
- bool setTPMStateLabel = true;
pid_t pid = -1;
cfg = virQEMUDriverGetConfig(driver);
@@ -956,13 +955,7 @@ qemuTPMEmulatorStart(virQEMUDriver *driver,
virCommandSetPidFile(cmd, pidfile);
virCommandSetErrorFD(cmd, &errfd);
- if (incomingMigration &&
- virFileIsSharedFS(tpm->data.emulator.storagepath, cfg->sharedFilesystems)
== 1) {
- /* security labels must have been set up on source already */
- setTPMStateLabel = false;
- }
-
- if (qemuSecuritySetTPMLabels(driver, vm, setTPMStateLabel) < 0)
+ if (qemuSecuritySetTPMLabels(driver, vm, true) < 0)
return -1;
if (qemuSecurityCommandRun(driver, vm, cmd, cfg->swtpm_user,
@@ -1011,7 +1004,7 @@ qemuTPMEmulatorStart(virQEMUDriver *driver,
virProcessKillPainfully(pid, true);
if (pidfile)
unlink(pidfile);
- qemuSecurityRestoreTPMLabels(driver, vm, setTPMStateLabel);
+ qemuSecurityRestoreTPMLabels(driver, vm, true);
return -1;
}
--
2.44.0
12:20 p.m.
New subject: [PATCH v2 5/5] qemu: Always set labels for TPM state
On 4/17/24 09:29, Andrea Bolognani wrote:
Up until this point, we have avoided setting labels for
incoming migration when the TPM state is stored on a shared
filesystem. This seems to make sense, because since the
underlying storage is shared surely the labels will be as
well.
There's one problem, though: when a guest is migrated, the
SELinux context for the destination process is different from
the one of the source process.
We haven't hit any issues with the current approach so far
because NFS doesn't support SELinux, so effectively it doesn't
matter whether relabeling happens or not: even if the SELinux
contexts of the source and target processes are different,
both will be able to access the storage.
Now that it's possible for the local admin to manually mark
exported directories as shared filesystems, however, things
can get problematic.
Consider the case in which one host (mig-one) exports its
local filesystem /srv/nfs/libvirt/swtpm via NFS, and at the
same time bind-mounts it to /var/lib/libvirt/swtpm; another
host (mig-two) mounts the same filesystem to the same
location, this time via NFS. Additionally, in order to
allow migration in both directions, on mig-one the
/var/lib/libvirt/swtpm directory is listed in the
shared_filesystems qemu.conf option.
When migrating from mig-one to mig-two, things work just fine;
going in the opposite direction, however, results in an error:
# virsh migrate cirros qemu+ssh://mig-one/system
error: internal error: QEMU unexpectedly closed the monitor (vm='cirros'):
qemu-system-x86_64: tpm-emulator: Setting the stateblob (type 1) failed with a TPM
error 0x1f
qemu-system-x86_64: error while loading state for instance 0x0 of device
'tpm-emulator'
qemu-system-x86_64: load of migration failed: Input/output error
This is because the directory on mig-one is considered a
shared filesystem and thus labeling is skipped, resulting in
a SELinux denial.
The solution is quite simple: remove the check and always
relabel. We know that it's okay to do so not just because it
makes the error seen above go away, but also because no such
check currently exists for disks and other types of persistent
storage such as NVRAM files, which always get relabeled.
Signed-off-by: Andrea Bolognani <abologna(a)redhat.com>
Reviewed-by: Stefan Berger <stefanb(a)linux.ibm.com>
> ---
> src/qemu/qemu_tpm.c | 11 ++---------
> 1 file changed, 2 insertions(+), 9 deletions(-)
>
> diff --git a/src/qemu/qemu_tpm.c b/src/qemu/qemu_tpm.c
> index cdf4bfbad2..e5a9fb8b16 100644
> --- a/src/qemu/qemu_tpm.c
> +++ b/src/qemu/qemu_tpm.c
> @@ -929,7 +929,6 @@ qemuTPMEmulatorStart(virQEMUDriver *driver,
> g_autofree char *pidfile = NULL;
> virTimeBackOffVar timebackoff;
> const unsigned long long timeout = 1000; /* ms */
> - bool setTPMStateLabel = true;
> pid_t pid = -1;
>
> cfg = virQEMUDriverGetConfig(driver);
> @@ -956,13 +955,7 @@ qemuTPMEmulatorStart(virQEMUDriver *driver,
> virCommandSetPidFile(cmd, pidfile);
> virCommandSetErrorFD(cmd, &errfd);
>
> - if (incomingMigration &&
> - virFileIsSharedFS(tpm->data.emulator.storagepath,
cfg->sharedFilesystems) == 1) {
> - /* security labels must have been set up on source already */
> - setTPMStateLabel = false;
> - }
> -
> - if (qemuSecuritySetTPMLabels(driver, vm, setTPMStateLabel) < 0)
> + if (qemuSecuritySetTPMLabels(driver, vm, true) < 0)
> return -1;
>
> if (qemuSecurityCommandRun(driver, vm, cmd, cfg->swtpm_user,
> @@ -1011,7 +1004,7 @@ qemuTPMEmulatorStart(virQEMUDriver *driver,
> virProcessKillPainfully(pid, true);
> if (pidfile)
> unlink(pidfile);
> - qemuSecurityRestoreTPMLabels(driver, vm, setTPMStateLabel);
> + qemuSecurityRestoreTPMLabels(driver, vm, true);
> return -1;
> }
>
17
days inactive
32
days old
13 comments
2 participants
participants (2)
-
Andrea Bolognani -
Stefan Berger