Example #1
0
/**
 * Prepare buffers for read request processing.
 *
 * This function converts remote buffers from client to local buffers
 * and prepares the latter.
 *
 * \param[in] env	execution environment
 * \param[in] exp	OBD export of client
 * \param[in] ofd	OFD device
 * \param[in] fid	FID of object
 * \param[in] la	object attributes
 * \param[in] oa	OBDO structure from client
 * \param[in] niocount	number of remote buffers
 * \param[in] rnb	remote buffers
 * \param[in] nr_local	number of local buffers
 * \param[in] lnb	local buffers
 * \param[in] jobid	job ID name
 *
 * \retval		0 on successful prepare
 * \retval		negative value on error
 */
static int ofd_preprw_read(const struct lu_env *env, struct obd_export *exp,
			   struct ofd_device *ofd, const struct lu_fid *fid,
			   struct lu_attr *la, struct obdo *oa, int niocount,
			   struct niobuf_remote *rnb, int *nr_local,
			   struct niobuf_local *lnb, char *jobid)
{
	struct ofd_object	*fo;
	int			 i, j, rc, tot_bytes = 0;

	ENTRY;
	LASSERT(env != NULL);

	fo = ofd_object_find(env, ofd, fid);
	if (IS_ERR(fo))
		RETURN(PTR_ERR(fo));
	LASSERT(fo != NULL);

	ofd_read_lock(env, fo);
	if (!ofd_object_exists(fo))
		GOTO(unlock, rc = -ENOENT);

	if (ofd->ofd_lfsck_verify_pfid && oa->o_valid & OBD_MD_FLFID) {
		rc = ofd_verify_ff(env, fo, oa);
		if (rc != 0)
			GOTO(unlock, rc);
	}

	*nr_local = 0;
	for (i = 0, j = 0; i < niocount; i++) {
		rc = dt_bufs_get(env, ofd_object_child(fo), rnb + i,
				 lnb + j, 0);
		if (unlikely(rc < 0))
			GOTO(buf_put, rc);
		LASSERT(rc <= PTLRPC_MAX_BRW_PAGES);
		/* correct index for local buffers to continue with */
		j += rc;
		*nr_local += rc;
		LASSERT(j <= PTLRPC_MAX_BRW_PAGES);
		tot_bytes += rnb[i].rnb_len;
	}

	LASSERT(*nr_local > 0 && *nr_local <= PTLRPC_MAX_BRW_PAGES);
	rc = dt_attr_get(env, ofd_object_child(fo), la);
	if (unlikely(rc))
		GOTO(buf_put, rc);

	rc = dt_read_prep(env, ofd_object_child(fo), lnb, *nr_local);
	if (unlikely(rc))
		GOTO(buf_put, rc);

	ofd_counter_incr(exp, LPROC_OFD_STATS_READ, jobid, tot_bytes);
	RETURN(0);

buf_put:
	dt_bufs_put(env, ofd_object_child(fo), lnb, *nr_local);
unlock:
	ofd_read_unlock(env, fo);
	ofd_object_put(env, fo);
	return rc;
}
Example #2
0
/**
 * Prepare buffers for write request processing.
 *
 * This function converts remote buffers from client to local buffers
 * and prepares the latter. If there is recovery in progress and required
 * object is missing then it can be re-created before write.
 *
 * \param[in] env	execution environment
 * \param[in] exp	OBD export of client
 * \param[in] ofd	OFD device
 * \param[in] fid	FID of object
 * \param[in] la	object attributes
 * \param[in] oa	OBDO structure from client
 * \param[in] objcount	always 1
 * \param[in] obj	object data
 * \param[in] rnb	remote buffers
 * \param[in] nr_local	number of local buffers
 * \param[in] lnb	local buffers
 * \param[in] jobid	job ID name
 *
 * \retval		0 on successful prepare
 * \retval		negative value on error
 */
static int ofd_preprw_write(const struct lu_env *env, struct obd_export *exp,
			    struct ofd_device *ofd, const struct lu_fid *fid,
			    struct lu_attr *la, struct obdo *oa,
			    int objcount, struct obd_ioobj *obj,
			    struct niobuf_remote *rnb, int *nr_local,
			    struct niobuf_local *lnb, char *jobid)
{
	struct ofd_object	*fo;
	int			 i, j, k, rc = 0, tot_bytes = 0;

	ENTRY;
	LASSERT(env != NULL);
	LASSERT(objcount == 1);

	if (unlikely(exp->exp_obd->obd_recovering)) {
		u64 seq = fid_seq(fid);
		u64 oid = fid_oid(fid);
		struct ofd_seq *oseq;

		oseq = ofd_seq_load(env, ofd, seq);
		if (IS_ERR(oseq)) {
			CERROR("%s: Can't find FID Sequence "LPX64": rc = %d\n",
			       ofd_name(ofd), seq, (int)PTR_ERR(oseq));
			GOTO(out, rc = -EINVAL);
		}

		if (oid > ofd_seq_last_oid(oseq)) {
			int sync = 0;
			int diff;

			mutex_lock(&oseq->os_create_lock);
			diff = oid - ofd_seq_last_oid(oseq);

			/* Do sync create if the seq is about to used up */
			if (fid_seq_is_idif(seq) || fid_seq_is_mdt0(seq)) {
				if (unlikely(oid >= IDIF_MAX_OID - 1))
					sync = 1;
			} else if (fid_seq_is_norm(seq)) {
				if (unlikely(oid >=
					     LUSTRE_DATA_SEQ_MAX_WIDTH - 1))
					sync = 1;
			} else {
				CERROR("%s : invalid o_seq "DOSTID"\n",
				       ofd_name(ofd), POSTID(&oa->o_oi));
				mutex_unlock(&oseq->os_create_lock);
				ofd_seq_put(env, oseq);
				GOTO(out, rc = -EINVAL);
			}

			while (diff > 0) {
				u64 next_id = ofd_seq_last_oid(oseq) + 1;
				int count = ofd_precreate_batch(ofd, diff);

				rc = ofd_precreate_objects(env, ofd, next_id,
							   oseq, count, sync);
				if (rc < 0) {
					mutex_unlock(&oseq->os_create_lock);
					ofd_seq_put(env, oseq);
					GOTO(out, rc);
				}

				diff -= rc;
			}

			mutex_unlock(&oseq->os_create_lock);
		}

		ofd_seq_put(env, oseq);
	}

	fo = ofd_object_find(env, ofd, fid);
	if (IS_ERR(fo))
		GOTO(out, rc = PTR_ERR(fo));
	LASSERT(fo != NULL);

	ofd_read_lock(env, fo);
	if (!ofd_object_exists(fo)) {
		CERROR("%s: BRW to missing obj "DOSTID"\n",
		       exp->exp_obd->obd_name, POSTID(&obj->ioo_oid));
		ofd_read_unlock(env, fo);
		ofd_object_put(env, fo);
		GOTO(out, rc = -ENOENT);
	}

	if (ofd->ofd_lfsck_verify_pfid && oa->o_valid & OBD_MD_FLFID) {
		rc = ofd_verify_ff(env, fo, oa);
		if (rc != 0) {
			ofd_read_unlock(env, fo);
			ofd_object_put(env, fo);
			GOTO(out, rc);
		}
	}

	/* Process incoming grant info, set OBD_BRW_GRANTED flag and grant some
	 * space back if possible */
	ofd_grant_prepare_write(env, exp, oa, rnb, obj->ioo_bufcnt);

	/* parse remote buffers to local buffers and prepare the latter */
	*nr_local = 0;
	for (i = 0, j = 0; i < obj->ioo_bufcnt; i++) {
		rc = dt_bufs_get(env, ofd_object_child(fo),
				 rnb + i, lnb + j, 1);
		if (unlikely(rc < 0))
			GOTO(err, rc);
		LASSERT(rc <= PTLRPC_MAX_BRW_PAGES);
		/* correct index for local buffers to continue with */
		for (k = 0; k < rc; k++) {
			lnb[j+k].lnb_flags = rnb[i].rnb_flags;
			if (!(rnb[i].rnb_flags & OBD_BRW_GRANTED))
				lnb[j+k].lnb_rc = -ENOSPC;
		}
		j += rc;
		*nr_local += rc;
		LASSERT(j <= PTLRPC_MAX_BRW_PAGES);
		tot_bytes += rnb[i].rnb_len;
	}
	LASSERT(*nr_local > 0 && *nr_local <= PTLRPC_MAX_BRW_PAGES);

	rc = dt_write_prep(env, ofd_object_child(fo), lnb, *nr_local);
	if (unlikely(rc != 0))
		GOTO(err, rc);

	ofd_counter_incr(exp, LPROC_OFD_STATS_WRITE, jobid, tot_bytes);
	RETURN(0);
err:
	dt_bufs_put(env, ofd_object_child(fo), lnb, *nr_local);
	ofd_read_unlock(env, fo);
	ofd_object_put(env, fo);
	/* ofd_grant_prepare_write() was called, so we must commit */
	ofd_grant_commit(exp, oa->o_grant_used, rc);
out:
	/* let's still process incoming grant information packed in the oa,
	 * but without enforcing grant since we won't proceed with the write.
	 * Just like a read request actually. */
	ofd_grant_prepare_read(env, exp, oa);
	return rc;
}
Example #3
0
int ofd_object_punch(const struct lu_env *env, struct ofd_object *fo,
		     __u64 start, __u64 end, struct lu_attr *la,
		     struct filter_fid *ff, struct obdo *oa)
{
	struct ofd_thread_info	*info = ofd_info(env);
	struct ofd_device	*ofd = ofd_obj2dev(fo);
	struct ofd_mod_data	*fmd;
	struct dt_object	*dob = ofd_object_child(fo);
	struct thandle		*th;
	int			 ff_needed = 0;
	int			 rc;

	ENTRY;

	/* we support truncate, not punch yet */
	LASSERT(end == OBD_OBJECT_EOF);

	fmd = ofd_fmd_get(info->fti_exp, &fo->ofo_header.loh_fid);
	if (fmd && fmd->fmd_mactime_xid < info->fti_xid)
		fmd->fmd_mactime_xid = info->fti_xid;
	ofd_fmd_put(info->fti_exp, fmd);

	ofd_write_lock(env, fo);
	if (!ofd_object_exists(fo))
		GOTO(unlock, rc = -ENOENT);

	if (ofd->ofd_lfsck_verify_pfid && oa->o_valid & OBD_MD_FLFID) {
		rc = ofd_verify_ff(env, fo, oa);
		if (rc != 0)
			GOTO(unlock, rc);
	}

	/* VBR: version recovery check */
	rc = ofd_version_get_check(info, fo);
	if (rc)
		GOTO(unlock, rc);

	rc = ofd_attr_handle_ugid(env, fo, la, 0 /* !is_setattr */);
	if (rc != 0)
		GOTO(unlock, rc);

	if (ff != NULL) {
		rc = ofd_object_ff_load(env, fo);
		if (rc == -ENODATA)
			ff_needed = 1;
		else if (rc < 0)
			GOTO(unlock, rc);
	}

	th = ofd_trans_create(env, ofd);
	if (IS_ERR(th))
		GOTO(unlock, rc = PTR_ERR(th));

	rc = dt_declare_attr_set(env, dob, la, th);
	if (rc)
		GOTO(stop, rc);

	rc = dt_declare_punch(env, dob, start, OBD_OBJECT_EOF, th);
	if (rc)
		GOTO(stop, rc);

	if (ff_needed) {
		info->fti_buf.lb_buf = ff;
		info->fti_buf.lb_len = sizeof(*ff);
		rc = dt_declare_xattr_set(env, ofd_object_child(fo),
					  &info->fti_buf, XATTR_NAME_FID, 0,
					  th);
		if (rc)
			GOTO(stop, rc);
	}

	rc = ofd_trans_start(env, ofd, fo, th);
	if (rc)
		GOTO(stop, rc);

	rc = dt_punch(env, dob, start, OBD_OBJECT_EOF, th,
		      ofd_object_capa(env, fo));
	if (rc)
		GOTO(stop, rc);

	rc = dt_attr_set(env, dob, la, th, ofd_object_capa(env, fo));
	if (rc)
		GOTO(stop, rc);

	if (ff_needed) {
		rc = dt_xattr_set(env, ofd_object_child(fo), &info->fti_buf,
				  XATTR_NAME_FID, 0, th, BYPASS_CAPA);
		if (rc == 0) {
			fo->ofo_pfid.f_seq = le64_to_cpu(ff->ff_parent.f_seq);
			fo->ofo_pfid.f_oid = le32_to_cpu(ff->ff_parent.f_oid);
			/* Currently, the filter_fid::ff_parent::f_ver is not
			 * the real parent MDT-object's FID::f_ver, instead it
			 * is the OST-object index in its parent MDT-object's
			 * layout EA. */
			fo->ofo_pfid.f_stripe_idx =
					le32_to_cpu(ff->ff_parent.f_stripe_idx);
		}
	}

	GOTO(stop, rc);

stop:
	ofd_trans_stop(env, ofd, th, rc);
unlock:
	ofd_write_unlock(env, fo);

	return rc;
}