+
+char *lustre_msg_string(struct lustre_msg *m, int index, int max_len)
+{
+ /* max_len == 0 means the string should fill the buffer */
+ char *str = lustre_msg_buf(m, index, 0);
+ int slen;
+ int blen;
+
+ if (str == NULL) {
+ CERROR ("can't unpack string in msg %p buffer[%d]\n", m, index);
+ return (NULL);
+ }
+
+ blen = m->buflens[index];
+ slen = strnlen(str, blen);
+
+ if (slen == blen) { /* not NULL terminated */
+ CERROR ("can't unpack non-NULL terminated string in "
+ "msg %p buffer[%d] len %d\n", m, index, blen);
+ return (NULL);
+ }
+
+ if (max_len == 0) {
+ if (slen != blen - 1) {
+ CERROR ("can't unpack short string in msg %p "
+ "buffer[%d] len %d: strlen %d\n",
+ m, index, blen, slen);
+ return (NULL);
+ }
+ } else if (slen > max_len) {
+ CERROR ("can't unpack oversized string in msg %p "
+ "buffer[%d] len %d strlen %d: max %d expected\n",
+ m, index, blen, slen, max_len);
+ return (NULL);
+ }
+
+ return (str);
+}
+
+/* Wrap up the normal fixed length cases */
+void *lustre_swab_buf(struct lustre_msg *msg, int index, int min_size,
+ void *swabber)
+{
+ void *ptr;
+
+ ptr = lustre_msg_buf(msg, index, min_size);
+ if (ptr == NULL)
+ return NULL;
+
+ if (swabber != NULL && lustre_msg_swabbed(msg))
+ ((void (*)(void *))swabber)(ptr);
+
+ return ptr;
+}
+
+void *lustre_swab_reqbuf(struct ptlrpc_request *req, int index, int min_size,
+ void *swabber)
+{
+ LASSERT_REQSWAB(req, index);
+ return lustre_swab_buf(req->rq_reqmsg, index, min_size, swabber);
+}
+
+void *lustre_swab_repbuf(struct ptlrpc_request *req, int index, int min_size,
+ void *swabber)
+{
+ LASSERT_REPSWAB(req, index);
+ return lustre_swab_buf(req->rq_repmsg, index, min_size, swabber);
+}
+
+/* byte flipping routines for all wire types declared in
+ * lustre_idl.h implemented here.
+ */
+
+void lustre_swab_connect(struct obd_connect_data *ocd)
+{
+ __swab64s(&ocd->ocd_connect_flags);
+ __swab32s(&ocd->ocd_nllu[0]);
+ __swab32s(&ocd->ocd_nllu[1]);
+}
+
+void lustre_swab_obdo(struct obdo *o)
+{
+ __swab64s(&o->o_id);
+ __swab64s(&o->o_gr);
+ __swab64s(&o->o_atime);
+ __swab64s(&o->o_mtime);
+ __swab64s(&o->o_ctime);
+ __swab64s(&o->o_size);
+ __swab64s(&o->o_blocks);
+ __swab64s(&o->o_grant);
+ __swab32s(&o->o_blksize);
+ __swab32s(&o->o_mode);
+ __swab32s(&o->o_uid);
+ __swab32s(&o->o_gid);
+ __swab32s(&o->o_flags);
+ __swab32s(&o->o_nlink);
+ __swab32s(&o->o_generation);
+ __swab64s(&o->o_valid);
+ __swab32s(&o->o_misc);
+ __swab32s(&o->o_easize);
+ __swab32s(&o->o_mds);
+ __swab64s(&o->o_fid);
+ /* o_inline is opaque */
+}
+
+/* mdc pack methods used by mdc and smfs*/
+void *mdc_create_pack(struct lustre_msg *msg, int offset,
+ struct mdc_op_data *op_data, __u32 mode,
+ __u64 rdev, const void *data, int datalen)
+{
+ struct mds_rec_create *rec;
+ char *tmp;
+ rec = lustre_msg_buf(msg, offset, sizeof (*rec));
+
+ rec->cr_opcode = REINT_CREATE;
+ rec->cr_id = op_data->id1;
+ memset(&rec->cr_replayid, 0, sizeof(rec->cr_replayid));
+ rec->cr_mode = mode;
+ rec->cr_rdev = rdev;
+ rec->cr_time = op_data->mod_time;
+
+ tmp = lustre_msg_buf(msg, offset + 1, op_data->namelen + 1);
+ LOGL0(op_data->name, op_data->namelen, tmp);
+
+ if (data) {
+ tmp = lustre_msg_buf(msg, offset + 2, datalen);
+ memcpy (tmp, data, datalen);
+ }
+ return ((void*)tmp + size_round(datalen));
+}
+
+__u32 mds_pack_open_flags(__u32 flags)
+{
+ return
+ (flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC |
+ MDS_OPEN_DELAY_CREATE | MDS_OPEN_HAS_EA |
+ MDS_OPEN_HAS_OBJS)) |
+ ((flags & O_CREAT) ? MDS_OPEN_CREAT : 0) |
+ ((flags & O_EXCL) ? MDS_OPEN_EXCL : 0) |
+ ((flags & O_TRUNC) ? MDS_OPEN_TRUNC : 0) |
+ ((flags & O_APPEND) ? MDS_OPEN_APPEND : 0) |
+ ((flags & O_SYNC) ? MDS_OPEN_SYNC : 0) |
+ ((flags & O_DIRECTORY) ? MDS_OPEN_DIRECTORY : 0) |
+ 0;
+}
+
+void *mdc_setattr_pack(struct lustre_msg *msg, int offset,
+ struct mdc_op_data *data, struct iattr *iattr,
+ void *ea, int ealen, void *ea2, int ea2len,
+ void *ea3, int ea3len)
+{
+ struct mds_rec_setattr *rec = lustre_msg_buf(msg, offset, sizeof(*rec));
+ char *tmp = NULL;
+
+ rec->sa_opcode = REINT_SETATTR;
+ rec->sa_id = data->id1;
+
+ if (iattr) {
+ rec->sa_valid = iattr->ia_valid;
+ rec->sa_mode = iattr->ia_mode;
+ rec->sa_uid = iattr->ia_uid;
+ rec->sa_gid = iattr->ia_gid;
+ rec->sa_size = iattr->ia_size;
+ rec->sa_atime = LTIME_S(iattr->ia_atime);
+ rec->sa_mtime = LTIME_S(iattr->ia_mtime);
+ rec->sa_ctime = LTIME_S(iattr->ia_ctime);
+ rec->sa_attr_flags = iattr->ia_attr_flags;
+ }
+ tmp = (char*)rec + size_round(sizeof(*rec));
+
+ if (ealen == 0)
+ return (void*)tmp;
+
+ memcpy(lustre_msg_buf(msg, offset + 1, ealen), ea, ealen);
+ tmp += size_round(ealen);
+
+ if (ea2len == 0)
+ return (void*)tmp;
+
+ memcpy(lustre_msg_buf(msg, offset + 2, ea2len), ea2, ea2len);
+ tmp += size_round(ea2len);
+
+ if (ea3len == 0)
+ return (void*)tmp;
+
+ memcpy(lustre_msg_buf(msg, offset + 3, ea3len), ea3, ea3len);
+ tmp += size_round(ea3len);
+
+ return (void*)tmp;
+}
+
+void *mdc_unlink_pack(struct lustre_msg *msg, int offset,
+ struct mdc_op_data *data)
+{
+ struct mds_rec_unlink *rec;
+ char *tmp;
+
+ rec = lustre_msg_buf(msg, offset, sizeof (*rec));
+ LASSERT (rec != NULL);
+
+ rec->ul_opcode = REINT_UNLINK;
+ rec->ul_mode = data->create_mode;
+ rec->ul_id1 = data->id1;
+ rec->ul_id2 = data->id2;
+ rec->ul_time = data->mod_time;
+
+ tmp = lustre_msg_buf(msg, offset + 1, data->namelen + 1);
+ LASSERT (tmp != NULL);
+ LOGL0(data->name, data->namelen, tmp);
+ return (void*)tmp;
+}
+
+void *mdc_link_pack(struct lustre_msg *msg, int offset,
+ struct mdc_op_data *data)
+{
+ struct mds_rec_link *rec;
+ char *tmp;
+
+ rec = lustre_msg_buf(msg, offset, sizeof (*rec));
+
+ rec->lk_opcode = REINT_LINK;
+ rec->lk_id1 = data->id1;
+ rec->lk_id2 = data->id2;
+ rec->lk_time = data->mod_time;
+
+ tmp = lustre_msg_buf(msg, offset + 1, data->namelen + 1);
+ LOGL0(data->name, data->namelen, tmp);
+
+ return (void*)tmp;
+}
+
+void *mdc_rename_pack(struct lustre_msg *msg, int offset,
+ struct mdc_op_data *data,
+ const char *old, int oldlen,
+ const char *new, int newlen)
+{
+ struct mds_rec_rename *rec;
+ char *tmp;
+
+ rec = lustre_msg_buf(msg, offset, sizeof (*rec));
+
+ /* XXX do something about time, uid, gid */
+ rec->rn_opcode = REINT_RENAME;
+ rec->rn_id1 = data->id1;
+ rec->rn_id2 = data->id2;
+ rec->rn_time = data->mod_time;
+
+ tmp = lustre_msg_buf(msg, offset + 1, oldlen + 1);
+ LOGL0(old, oldlen, tmp);
+
+ if (new) {
+ tmp = lustre_msg_buf(msg, offset + 2, newlen + 1);
+ LOGL0(new, newlen, tmp);
+ }
+ return (void*)tmp;
+}
+
+void lustre_swab_obd_statfs(struct obd_statfs *os)
+{
+ __swab64s(&os->os_type);
+ __swab64s(&os->os_blocks);
+ __swab64s(&os->os_bfree);
+ __swab64s(&os->os_bavail);
+ __swab64s(&os->os_ffree);
+ /* no need to swap os_fsid */
+ __swab32s(&os->os_bsize);
+ __swab32s(&os->os_namelen);
+ /* no need to swap os_spare */
+}
+
+void lustre_swab_obd_ioobj(struct obd_ioobj *ioo)
+{
+ __swab64s(&ioo->ioo_id);
+ __swab64s(&ioo->ioo_gr);
+ __swab32s(&ioo->ioo_type);
+ __swab32s(&ioo->ioo_bufcnt);
+}
+
+void lustre_swab_niobuf_remote(struct niobuf_remote *nbr)
+{
+ __swab64s(&nbr->offset);
+ __swab32s(&nbr->len);
+ __swab32s(&nbr->flags);
+}
+
+void lustre_swab_ost_body(struct ost_body *b)
+{
+ lustre_swab_obdo(&b->oa);
+}
+
+void lustre_swab_ost_last_id(obd_id *id)
+{
+ __swab64s(id);
+}
+
+void lustre_swab_generic_32s(__u32 *val)
+{
+ __swab32s(val);
+}
+
+void lustre_swab_ost_lvb(struct ost_lvb *lvb)
+{
+ __swab64s(&lvb->lvb_size);
+ __swab64s(&lvb->lvb_mtime);
+ __swab64s(&lvb->lvb_atime);
+ __swab64s(&lvb->lvb_ctime);
+ __swab64s(&lvb->lvb_blocks);
+}
+
+void lustre_swab_lustre_stc (struct lustre_stc *stc)
+{
+ __swab64s(&stc->u.e3s.l3s_ino);
+ __swab32s(&stc->u.e3s.l3s_gen);
+ __swab32s(&stc->u.e3s.l3s_type);
+}
+
+void lustre_swab_lustre_fid(struct lustre_fid *fid)
+{
+ __swab64s(&fid->lf_id);
+ __swab64s(&fid->lf_group);
+ /*__swab32s (&fid->lf_version);*/
+}
+
+void lustre_swab_lustre_id(struct lustre_id *id)
+{
+ lustre_swab_lustre_stc(&id->li_stc);
+ lustre_swab_lustre_fid(&id->li_fid);
+}
+
+void lustre_swab_mds_status_req(struct mds_status_req *r)
+{
+ __swab32s(&r->flags);
+ __swab32s(&r->repbuf);
+}
+
+/*
+ * because sec_desc is variable buffer, we must check it by hand
+ */
+struct mds_req_sec_desc *lustre_swab_mds_secdesc(struct ptlrpc_request *req,
+ int offset)
+{
+ struct mds_req_sec_desc *rsd;
+ struct lustre_msg *m;
+ __u32 i;
+
+ LASSERT_REQSWAB(req, offset);
+
+ m = req->rq_reqmsg;
+ rsd = lustre_msg_buf(m, offset, sizeof(*rsd));
+ if (!rsd)
+ return NULL;
+
+ if (lustre_msg_swabbed(m)) {
+ __swab32s(&rsd->rsd_uid);
+ __swab32s(&rsd->rsd_gid);
+ __swab32s(&rsd->rsd_fsuid);
+ __swab32s(&rsd->rsd_fsgid);
+ __swab32s(&rsd->rsd_cap);
+ __swab32s(&rsd->rsd_ngroups);
+ }
+
+ if (rsd->rsd_ngroups > LUSTRE_MAX_GROUPS) {
+ CERROR("%u groups is not allowed\n", rsd->rsd_ngroups);
+ return NULL;
+ }
+
+ if (m->buflens[offset] !=
+ sizeof(*rsd) + rsd->rsd_ngroups * sizeof(__u32)) {
+ CERROR("bufflen %u while contains %u groups\n",
+ m->buflens[offset], rsd->rsd_ngroups);
+ return NULL;
+ }
+
+ if (lustre_msg_swabbed(m)) {
+ for (i = 0; i < rsd->rsd_ngroups; i++)
+ __swab32s(&rsd->rsd_groups[i]);
+ }
+
+ return rsd;
+}
+
+void lustre_swab_mds_body(struct mds_body *b)
+{
+ lustre_swab_lustre_id(&b->id1);
+ lustre_swab_lustre_id(&b->id2);
+ /* handle is opaque */
+ __swab64s(&b->size);
+ __swab64s(&b->blocks);
+ __swab64s(&b->valid);
+ __swab32s(&b->mode);
+ __swab32s(&b->uid);
+ __swab32s(&b->gid);
+ __swab32s(&b->mtime);
+ __swab32s(&b->ctime);
+ __swab32s(&b->atime);
+ __swab32s(&b->flags);
+ __swab32s(&b->rdev);
+ __swab32s(&b->nlink);
+ __swab32s(&b->eadatasize);
+}
+void lustre_swab_mds_rec_setattr(struct mds_rec_setattr *sa)
+{
+ __swab32s(&sa->sa_opcode);
+ __swab32s(&sa->sa_valid);
+ lustre_swab_lustre_id(&sa->sa_id);
+ __swab32s(&sa->sa_mode);
+ __swab32s(&sa->sa_uid);
+ __swab32s(&sa->sa_gid);
+ __swab32s(&sa->sa_attr_flags);
+ __swab64s(&sa->sa_size);
+ __swab64s(&sa->sa_atime);
+ __swab64s(&sa->sa_mtime);
+ __swab64s(&sa->sa_ctime);
+}
+
+void lustre_swab_mds_rec_create(struct mds_rec_create *cr)
+{
+ __swab32s(&cr->cr_opcode);
+ __swab32s(&cr->cr_flags); /* for use with open */
+ __swab32s(&cr->cr_mode);
+ lustre_swab_lustre_id(&cr->cr_id);
+ lustre_swab_lustre_id(&cr->cr_replayid);
+ __swab64s(&cr->cr_time);
+ __swab64s(&cr->cr_rdev);
+}
+
+void lustre_swab_mds_rec_link(struct mds_rec_link *lk)
+{
+ __swab32s(&lk->lk_opcode);
+ lustre_swab_lustre_id(&lk->lk_id1);
+ lustre_swab_lustre_id(&lk->lk_id2);
+}
+
+void lustre_swab_mds_rec_unlink(struct mds_rec_unlink *ul)
+{
+ __swab32s(&ul->ul_opcode);
+ __swab32s(&ul->ul_mode);
+ lustre_swab_lustre_id(&ul->ul_id1);
+ lustre_swab_lustre_id(&ul->ul_id2);
+}
+
+void lustre_swab_mds_rec_rename (struct mds_rec_rename *rn)
+{
+ __swab32s(&rn->rn_opcode);
+ lustre_swab_lustre_id(&rn->rn_id1);
+ lustre_swab_lustre_id(&rn->rn_id2);
+}
+
+void lustre_swab_lov_desc(struct lov_desc *ld)
+{
+ __swab32s(&ld->ld_tgt_count);
+ __swab32s(&ld->ld_active_tgt_count);
+ __swab32s(&ld->ld_default_stripe_count);
+ __swab64s(&ld->ld_default_stripe_size);
+ __swab64s(&ld->ld_default_stripe_offset);
+ __swab32s(&ld->ld_pattern);
+ /* uuid endian insensitive */
+}
+
+void lustre_swab_ldlm_res_id(struct ldlm_res_id *id)
+{
+ int i;
+
+ for (i = 0; i < RES_NAME_SIZE; i++)
+ __swab64s(&id->name[i]);
+}
+
+void lustre_swab_ldlm_policy_data(ldlm_policy_data_t *d)
+{
+ /* the lock data is a union and the first three fields of both EXTENT
+ * and FLOCK types are __u64, so it's ok to swab them in the same way */
+ __swab64s(&d->l_flock.start);
+ __swab64s(&d->l_flock.end);
+ __swab64s(&d->l_flock.pid);
+ __swab64s(&d->l_flock.blocking_pid);
+}
+
+void lustre_swab_ldlm_intent(struct ldlm_intent *i)
+{
+ __swab64s(&i->opc);
+}
+
+void lustre_swab_ldlm_resource_desc(struct ldlm_resource_desc *r)
+{
+ __swab32s(&r->lr_type);
+ lustre_swab_ldlm_res_id(&r->lr_name);
+}
+
+void lustre_swab_ldlm_lock_desc(struct ldlm_lock_desc *l)
+{
+ lustre_swab_ldlm_resource_desc(&l->l_resource);
+ __swab32s(&l->l_req_mode);
+ __swab32s(&l->l_granted_mode);
+ lustre_swab_ldlm_policy_data(&l->l_policy_data);
+}
+
+void lustre_swab_ldlm_request(struct ldlm_request *rq)
+{
+ __swab32s(&rq->lock_flags);
+ lustre_swab_ldlm_lock_desc(&rq->lock_desc);
+ /* lock_handle1 opaque */
+ /* lock_handle2 opaque */
+}
+
+void lustre_swab_ldlm_reply(struct ldlm_reply *r)
+{
+ __swab32s(&r->lock_flags);
+ lustre_swab_ldlm_lock_desc(&r->lock_desc);
+ /* lock_handle opaque */
+ __swab64s(&r->lock_policy_res1);
+ __swab64s(&r->lock_policy_res2);
+}
+
+void lustre_swab_ptlbd_op(struct ptlbd_op *op)
+{
+ __swab16s(&op->op_cmd);
+ __swab16s(&op->op_lun);
+ __swab16s(&op->op_niob_cnt);
+ /* ignore op__padding */
+ __swab32s(&op->op_block_cnt);
+}
+
+void lustre_swab_ptlbd_niob(struct ptlbd_niob *n)
+{
+ __swab64s(&n->n_xid);
+ __swab64s(&n->n_block_nr);
+ __swab32s(&n->n_offset);
+ __swab32s(&n->n_length);
+}
+
+void lustre_swab_ptlbd_rsp(struct ptlbd_rsp *r)
+{
+ __swab16s(&r->r_status);
+ __swab16s(&r->r_error_cnt);
+}
+
+void lustre_swab_remote_perm(struct mds_remote_perm *p)
+{
+ __swab32s(&p->mrp_auth_uid);
+ __swab32s(&p->mrp_auth_gid);
+ __swab16s(&p->mrp_perm);
+}
+
+/* no one calls this */
+int llog_log_swabbed(struct llog_log_hdr *hdr)
+{
+ if (hdr->llh_hdr.lrh_type == __swab32(LLOG_HDR_MAGIC))
+ return 1;
+ if (hdr->llh_hdr.lrh_type == LLOG_HDR_MAGIC)
+ return 0;
+ return -1;
+}
+
+void lustre_assert_wire_constants(void)
+{
+}
+/* for gks key rec */
+void lustre_swab_key_perms(struct key_perm *kperm)
+{
+ int i;
+ __swab32s(&kperm->kp_uid);
+ __swab32s(&kperm->kp_gid);
+ __swab32s(&kperm->kp_mode);
+ __swab32s(&kperm->kp_acl_count);
+ for (i = 0; i < kperm->kp_acl_count; i++) {
+ __swab16s(&kperm->kp_acls[i].e_tag);
+ __swab16s(&kperm->kp_acls[i].e_perm);
+ __swab32s(&kperm->kp_acls[i].e_id);
+ }
+}
+void lustre_swab_key_context (struct key_context *kctxt)
+{
+ __swab32s (&kctxt->kc_command);
+ __swab32s (&kctxt->kc_valid); /* for use with open */
+ lustre_swab_key_perms(&kctxt->kc_perm);
+}