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security_util: Introduce virSecurityMoveRememberedLabel

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A simple helper function that would be used from DAC and SELinux
drivers.

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Cole Robinson <crobinso@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
This commit is contained in:
Michal Privoznik 2019-03-21 15:44:52 +01:00
parent 8b74cecbdf
commit d73f3f5836
2 changed files with 68 additions and 0 deletions
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63
src/security/security_util.c
View File

@ -256,3 +256,66 @@ virSecuritySetRememberedLabel(const char *name,
VIR_FREE(ref_name);
return ret;
}
int
virSecurityMoveRememberedLabel(const char *name,
const char *src,
const char *dst)
{
VIR_AUTOFREE(char *) ref_name = NULL;
VIR_AUTOFREE(char *) ref_value = NULL;
VIR_AUTOFREE(char *) attr_name = NULL;
VIR_AUTOFREE(char *) attr_value = NULL;
if (!(ref_name = virSecurityGetRefCountAttrName(name)) |
!(attr_name = virSecurityGetAttrName(name)))
return -1;
if (virFileGetXAttrQuiet(src, ref_name, &ref_value) < 0) {
if (errno == ENOSYS || errno == ENOTSUP) {
return -2;
} else if (errno != ENODATA) {
virReportSystemError(errno,
_("Unable to get XATTR %s on %s"),
ref_name, src);
return -1;
}
}
if (virFileGetXAttrQuiet(src, attr_name, &attr_value) < 0) {
if (errno == ENOSYS || errno == ENOTSUP) {
return -2;
} else if (errno != ENODATA) {
virReportSystemError(errno,
_("Unable to get XATTR %s on %s"),
attr_name, src);
return -1;
}
}
if (ref_value &&
virFileRemoveXAttr(src, ref_name) < 0) {
return -1;
}
if (attr_value &&
virFileRemoveXAttr(src, attr_name) < 0) {
return -1;
}
if (dst) {
if (ref_value &&
virFileSetXAttr(dst, ref_name, ref_value) < 0) {
return -1;
}
if (attr_value &&
virFileSetXAttr(dst, attr_name, attr_value) < 0) {
ignore_value(virFileRemoveXAttr(dst, ref_name));
return -1;
}
}
return 0;
}

5
src/security/security_util.h
View File

@ -27,3 +27,8 @@ int
virSecuritySetRememberedLabel(const char *name,
const char *path,
const char *label);
int
virSecurityMoveRememberedLabel(const char *name,
const char *src,
const char *dst);