C++ (Cpp) OST_LVB_SET_ERR Examples

Example #1

File: ofd_lvb.c Project: EMSL-MSC/lustre-release

/**
 * Implementation of ldlm_valblock_ops::lvbo_init for OFD.
 *
 * This function allocates and initializes new LVB data for the given
 * LDLM resource if it is not allocated yet. New LVB is filled with attributes
 * of the object associated with that resource. Function does nothing if LVB
 * for the given LDLM resource is allocated already.
 *
 * Called with res->lr_lvb_sem held.
 *
 * \param[in] res	LDLM resource
 *
 * \retval		0 on successful setup
 * \retval		negative value on error
 */
static int ofd_lvbo_init(struct ldlm_resource *res)
{
	struct ost_lvb		*lvb;
	struct ofd_device	*ofd;
	struct ofd_object	*fo;
	struct ofd_thread_info	*info;
	struct lu_env		 env;
	int			 rc = 0;

	ENTRY;

	LASSERT(res);
	LASSERT(mutex_is_locked(&res->lr_lvb_mutex));

	if (res->lr_lvb_data != NULL)
		RETURN(0);

	ofd = ldlm_res_to_ns(res)->ns_lvbp;
	LASSERT(ofd != NULL);

	if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_OST_LVB))
		RETURN(-ENOMEM);

	rc = lu_env_init(&env, LCT_DT_THREAD);
	if (rc)
		RETURN(rc);

	OBD_ALLOC_PTR(lvb);
	if (lvb == NULL)
		GOTO(out_env, rc = -ENOMEM);

	res->lr_lvb_data = lvb;
	res->lr_lvb_len = sizeof(*lvb);

	info = ofd_info_init(&env, NULL);
	ost_fid_from_resid(&info->fti_fid, &res->lr_name,
			   ofd->ofd_lut.lut_lsd.lsd_osd_index);
	fo = ofd_object_find(&env, ofd, &info->fti_fid);
	if (IS_ERR(fo))
		GOTO(out_lvb, rc = PTR_ERR(fo));

	rc = ofd_attr_get(&env, fo, &info->fti_attr);
	if (rc)
		GOTO(out_obj, rc);

	lvb->lvb_size = info->fti_attr.la_size;
	lvb->lvb_blocks = info->fti_attr.la_blocks;
	lvb->lvb_mtime = info->fti_attr.la_mtime;
	lvb->lvb_atime = info->fti_attr.la_atime;
	lvb->lvb_ctime = info->fti_attr.la_ctime;

	CDEBUG(D_DLMTRACE, "res: "DFID" initial lvb size: "LPU64", "
	       "mtime: "LPX64", blocks: "LPX64"\n",
	       PFID(&info->fti_fid), lvb->lvb_size,
	       lvb->lvb_mtime, lvb->lvb_blocks);

	EXIT;
out_obj:
	ofd_object_put(&env, fo);
out_lvb:
	if (rc != 0)
		OST_LVB_SET_ERR(lvb->lvb_blocks, rc);
out_env:
	lu_env_fini(&env);
	/* Don't free lvb data on lookup error */
	return rc;
}

Example #2

File: ofd_lvb.c Project: Xyratex/lustre-stable

/**
 * Implementation of ldlm_valblock_ops::lvbo_init for OFD.
 *
 * This function allocates and initializes new LVB data for the given
 * LDLM resource if it is not allocated yet. New LVB is filled with attributes
 * of the object associated with that resource. Function does nothing if LVB
 * for the given LDLM resource is allocated already.
 *
 * Called with res->lr_lvb_sem held.
 *
 * \param[in] lock	LDLM lock on resource
 *
 * \retval		0 on successful setup
 * \retval		negative value on error
 */
static int ofd_lvbo_init(const struct lu_env *env, struct ldlm_resource *res)
{
	struct ost_lvb		*lvb;
	struct ofd_device	*ofd;
	struct ofd_object	*fo;
	struct ofd_thread_info	*info;
	struct lu_env _env;
	int rc = 0;
	ENTRY;

	LASSERT(res);
	LASSERT(mutex_is_locked(&res->lr_lvb_mutex));

	if (res->lr_lvb_data != NULL)
		RETURN(0);

	ofd = ldlm_res_to_ns(res)->ns_lvbp;
	LASSERT(ofd != NULL);

	if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_OST_LVB))
		RETURN(-ENOMEM);

	if (!env) {
		rc = lu_env_init(&_env, LCT_DT_THREAD);
		if (rc)
			RETURN(rc);
		env = &_env;
	}

	OBD_ALLOC_PTR(lvb);
	if (lvb == NULL)
		GOTO(out, rc = -ENOMEM);

	info = ofd_info(env);
	res->lr_lvb_data = lvb;
	res->lr_lvb_len = sizeof(*lvb);

	ost_fid_from_resid(&info->fti_fid, &res->lr_name,
			   ofd->ofd_lut.lut_lsd.lsd_osd_index);
	fo = ofd_object_find(env, ofd, &info->fti_fid);
	if (IS_ERR(fo))
		GOTO(out_lvb, rc = PTR_ERR(fo));

	rc = ofd_attr_get(env, fo, &info->fti_attr);
	if (rc) {
		struct ofd_seq		*oseq;
		__u64			 seq;

		/* Object could be recreated during the first
		 * CLEANUP_ORPHAN request. */
		if (rc == -ENOENT) {
			seq = fid_seq(&info->fti_fid);
			oseq = ofd_seq_load(env, ofd, fid_seq_is_idif(seq) ?
					    FID_SEQ_OST_MDT0 : seq);
			if (!IS_ERR_OR_NULL(oseq)) {
				if (!oseq->os_last_id_synced)
					rc = -EAGAIN;
				ofd_seq_put(env, oseq);
			}
		}
		GOTO(out_obj, rc);
	}

	lvb->lvb_size = info->fti_attr.la_size;
	lvb->lvb_blocks = info->fti_attr.la_blocks;
	lvb->lvb_mtime = info->fti_attr.la_mtime;
	lvb->lvb_atime = info->fti_attr.la_atime;
	lvb->lvb_ctime = info->fti_attr.la_ctime;

	CDEBUG(D_DLMTRACE, "res: "DFID" initial lvb size: %llu, "
	       "mtime: %#llx, blocks: %#llx\n",
	       PFID(&info->fti_fid), lvb->lvb_size,
	       lvb->lvb_mtime, lvb->lvb_blocks);

	info->fti_attr.la_valid = 0;

	EXIT;
out_obj:
	ofd_object_put(env, fo);
out_lvb:
	if (rc != 0)
		OST_LVB_SET_ERR(lvb->lvb_blocks, rc);
out:
	/* Don't free lvb data on lookup error */
	if (env && env == &_env)
		lu_env_fini(&_env);
	return rc;
}