C++ (Cpp) osd_sa_xattr_list示例

示例#1

int osd_xattr_list(const struct lu_env *env, struct dt_object *dt,
		struct lu_buf *lb, struct lustre_capa *capa)
{
	struct osd_thread_info *oti = osd_oti_get(env);
	struct osd_object      *obj = osd_dt_obj(dt);
	struct osd_device      *osd = osd_obj2dev(obj);
	udmu_objset_t          *uos = &osd->od_objset;
	zap_cursor_t           *zc;
	int                    rc, counted = 0, remain = lb->lb_len;
	ENTRY;

	LASSERT(obj->oo_db != NULL);
	LASSERT(osd_invariant(obj));
	LASSERT(dt_object_exists(dt));

	down(&obj->oo_guard);

	rc = osd_sa_xattr_list(env, obj, lb);
	if (rc < 0)
		GOTO(out, rc);
	counted = rc;
	remain -= counted;

	/* continue with dnode xattr if any */
	if (obj->oo_xattr == ZFS_NO_OBJECT)
		GOTO(out, rc = counted);

	rc = -udmu_zap_cursor_init(&zc, uos, obj->oo_xattr, 0);
	if (rc)
		GOTO(out, rc);

	while ((rc = -udmu_zap_cursor_retrieve_key(env, zc, oti->oti_key,
						MAXNAMELEN)) == 0) {
		rc = strlen(oti->oti_key);
		if (lb->lb_buf != NULL) {
			if (rc + 1 > remain)
				RETURN(-ERANGE);

			memcpy(lb->lb_buf, oti->oti_key, rc);
			lb->lb_buf += rc;
			*((char *)lb->lb_buf) = '\0';
			lb->lb_buf++;
			remain -= rc + 1;
		}
		counted += rc + 1;

		zap_cursor_advance(zc);
	}
	if (rc < 0)
		GOTO(out_fini, rc);
	rc = counted;

out_fini:
	udmu_zap_cursor_fini(zc);
out:
	up(&obj->oo_guard);
	RETURN(rc);

}

示例#2

文件： osd_xattr.c 项目： nkzxw/lustre-stable

int osd_xattr_list(const struct lu_env *env, struct dt_object *dt,
		   const struct lu_buf *lb)
{
	struct osd_object      *obj = osd_dt_obj(dt);
	struct osd_device      *osd = osd_obj2dev(obj);
	zap_attribute_t	       *za = &osd_oti_get(env)->oti_za;
	zap_cursor_t           *zc;
	int                    rc, counted;
	ENTRY;

	LASSERT(obj->oo_db != NULL);
	LASSERT(osd_invariant(obj));
	LASSERT(dt_object_exists(dt));

	down_read(&obj->oo_guard);

	rc = osd_sa_xattr_list(env, obj, lb);
	if (rc < 0)
		GOTO(out, rc);

	counted = rc;

	/* continue with dnode xattr if any */
	if (obj->oo_xattr == ZFS_NO_OBJECT)
		GOTO(out, rc = counted);

	rc = osd_zap_cursor_init(&zc, osd->od_os, obj->oo_xattr, 0);
	if (rc)
		GOTO(out, rc);

	while ((rc = -zap_cursor_retrieve(zc, za)) == 0) {
		if (!osd_obj2dev(obj)->od_posix_acl &&
		    (strcmp(za->za_name, POSIX_ACL_XATTR_ACCESS) == 0 ||
		     strcmp(za->za_name, POSIX_ACL_XATTR_DEFAULT) == 0)) {
			zap_cursor_advance(zc);
			continue;
		}

		rc = strlen(za->za_name);
		if (lb->lb_buf != NULL) {
			if (counted + rc + 1 > lb->lb_len)
				GOTO(out_fini, rc = -ERANGE);

			memcpy(lb->lb_buf + counted, za->za_name, rc + 1);
		}
		counted += rc + 1;

		zap_cursor_advance(zc);
	}
	if (rc == -ENOENT) /* no more kes in the index */
		rc = 0;
	else if (unlikely(rc < 0))
		GOTO(out_fini, rc);
	rc = counted;

out_fini:
	osd_zap_cursor_fini(zc);
out:
	up_read(&obj->oo_guard);
	RETURN(rc);

}