static int
SELinuxSetSecurityFileLabel(virDomainDiskDefPtr disk,
const char *path,
size_t depth,
void *opaque)
{
const virSecurityLabelDefPtr secdef = opaque;
int ret;
if (depth == 0) {
if (disk->shared) {
ret = SELinuxSetFilecon(path, default_image_context);
} else if (disk->readonly) {
ret = SELinuxSetFilecon(path, default_content_context);
} else if (secdef->imagelabel) {
ret = SELinuxSetFilecon(path, secdef->imagelabel);
} else {
ret = 0;
}
} else {
ret = SELinuxSetFilecon(path, default_content_context);
}
if (ret < 0 &&
virStorageFileIsSharedFSType(path,
VIR_STORAGE_FILE_SHFS_NFS) == 1)
ret = 0;
return ret;
}
/* Attempt to change the label of PATH to TCON. If OPTIONAL is true,
* return 1 if labelling was not possible. Otherwise, require a label
* change, and return 0 for success, -1 for failure. */
static int
SELinuxSetFileconHelper(const char *path, char *tcon, bool optional)
{
security_context_t econ;
VIR_INFO("Setting SELinux context on '%s' to '%s'", path, tcon);
if (setfilecon(path, tcon) < 0) {
int setfilecon_errno = errno;
if (getfilecon(path, &econ) >= 0) {
if (STREQ(tcon, econ)) {
freecon(econ);
/* It's alright, there's nothing to change anyway. */
return optional ? 1 : 0;
}
freecon(econ);
}
/* if the error complaint is related to an image hosted on
* an nfs mount, or a usbfs/sysfs filesystem not supporting
* labelling, then just ignore it & hope for the best.
* The user hopefully set one of the necessary SELinux
* virt_use_{nfs,usb,pci} boolean tunables to allow it...
*/
if (setfilecon_errno != EOPNOTSUPP && setfilecon_errno != ENOTSUP) {
virReportSystemError(setfilecon_errno,
_("unable to set security context '%s' on '%s'"),
tcon, path);
if (security_getenforce() == 1)
return -1;
} else {
const char *msg;
if ((virStorageFileIsSharedFSType(path,
VIR_STORAGE_FILE_SHFS_NFS) == 1) &&
security_get_boolean_active("virt_use_nfs") != 1) {
msg = _("Setting security context '%s' on '%s' not supported. "
"Consider setting virt_use_nfs");
if (security_getenforce() == 1)
VIR_WARN(msg, tcon, path);
else
VIR_INFO(msg, tcon, path);
} else {
VIR_INFO("Setting security context '%s' on '%s' not supported",
tcon, path);
}
if (optional)
return 1;
}
}
return 0;
}
