-
-int lmv_revalidate_slaves(struct obd_export *exp, struct ptlrpc_request **reqp,
- const struct lu_fid *mid, struct lookup_intent *oit,
- int master_valid, ldlm_blocking_callback cb_blocking,
- int extra_lock_flags)
-{
- struct obd_device *obd = exp->exp_obd;
- struct lmv_obd *lmv = &obd->u.lmv;
- int master_lockm = 0;
- struct lustre_handle *lockh = NULL;
- struct ptlrpc_request *mreq = *reqp;
- struct lustre_handle master_lockh = { 0 };
- struct md_op_data *op_data;
- struct ldlm_lock *lock;
- unsigned long size = 0;
- struct mdt_body *body;
- struct lmv_object *obj;
- int i;
- int rc = 0;
- struct lu_fid fid;
- struct ptlrpc_request *req;
- ldlm_blocking_callback cb;
- struct lookup_intent it;
- struct lmv_tgt_desc *tgt;
- int master;
- ENTRY;
-
- CDEBUG(D_INODE, "Revalidate master obj "DFID"\n", PFID(mid));
-
- OBD_ALLOC_PTR(op_data);
- if (op_data == NULL)
- RETURN(-ENOMEM);
-
- /*
- * We have to loop over the subobjects, check validity and update them
- * from MDS if needed. It's very useful that we need not to update all
- * the fields. Say, common fields (that are equal on all the subojects
- * need not to be update, another fields (i_size, for example) are
- * cached all the time.
- */
- obj = lmv_object_find_lock(obd, mid);
- if (obj == NULL) {
- OBD_FREE_PTR(op_data);
- RETURN(-EALREADY);
- }
-
- for (i = 0; i < obj->lo_objcount; i++) {
- fid = obj->lo_stripes[i].ls_fid;
- master = lu_fid_eq(&fid, &obj->lo_fid);
- cb = master ? cb_blocking : lmv_blocking_ast;
-
- /*
- * We need i_size and we would like to check possible cached locks,
- * so this is is IT_GETATTR intent.
- */
- memset(&it, 0, sizeof(it));
- it.it_op = IT_GETATTR;
-
- if (master && master_valid) {
- /*
- * lmv_intent_lookup() already checked
- * validness and took the lock.
- */
- if (mreq != NULL) {
- body = req_capsule_server_get(&mreq->rq_pill,
- &RMF_MDT_BODY);
- LASSERT(body != NULL);
- goto update;
- }
- /*
- * Take already cached attrs into account.
- */
- CDEBUG(D_INODE,
- "Master "DFID"is locked and cached\n",
- PFID(mid));
- goto release_lock;
- }
-
- /*
- * Prepare op_data for revalidating. Note that @fid2 shuld be
- * defined otherwise it will go to server and take new lock
- * which is what we reall not need here.
- */
- memset(op_data, 0, sizeof(*op_data));
- op_data->op_bias = MDS_CROSS_REF;
- op_data->op_fid1 = fid;
- op_data->op_fid2 = fid;
- req = NULL;
-
- tgt = lmv_get_target(lmv, obj->lo_stripes[i].ls_mds);
- if (IS_ERR(tgt))
- GOTO(cleanup, rc = PTR_ERR(tgt));
-
- CDEBUG(D_INODE, "Revalidate slave obj "DFID" -> mds #%d\n",
- PFID(&fid), tgt->ltd_idx);
-
- rc = md_intent_lock(tgt->ltd_exp, op_data, NULL, 0, &it, 0,
- &req, cb, extra_lock_flags);
-
- lockh = (struct lustre_handle *)&it.d.lustre.it_lock_handle;
- if (rc > 0 && req == NULL) {
- /*
- * Nice, this slave is valid.
- */
- CDEBUG(D_INODE, "Cached slave "DFID"\n", PFID(&fid));
- goto release_lock;
- }
-
- if (rc < 0)
- GOTO(cleanup, rc);
-
- if (master) {
- /*
- * Save lock on master to be returned to the caller.
- */
- CDEBUG(D_INODE, "No lock on master "DFID" yet\n",
- PFID(mid));
- memcpy(&master_lockh, lockh, sizeof(master_lockh));
- master_lockm = it.d.lustre.it_lock_mode;
- it.d.lustre.it_lock_mode = 0;
- } else {
- /*
- * This is slave. We want to control it.
- */
- lock = ldlm_handle2lock(lockh);
- LASSERT(lock != NULL);
- lock->l_ast_data = lmv_object_get(obj);
- LDLM_LOCK_PUT(lock);
- }
-
- if (*reqp == NULL) {
- /*
- * This is first reply, we'll use it to return updated
- * data back to the caller.
- */
- LASSERT(req != NULL);
- ptlrpc_request_addref(req);
- *reqp = req;
- }
-
- body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
- LASSERT(body != NULL);
-
-update:
- obj->lo_stripes[i].ls_size = body->size;
-
- CDEBUG(D_INODE, "Fresh size %lu from "DFID"\n",
- (unsigned long)obj->lo_stripes[i].ls_size, PFID(&fid));
-
- if (req)
- ptlrpc_req_finished(req);
-release_lock:
- size += obj->lo_stripes[i].ls_size;
-
- if (it.d.lustre.it_lock_mode && lockh) {
- ldlm_lock_decref(lockh, it.d.lustre.it_lock_mode);
- it.d.lustre.it_lock_mode = 0;
- }
- }
-
- if (*reqp) {
- /*
- * Some attrs got refreshed, we have reply and it's time to put
- * fresh attrs to it.
- */
- CDEBUG(D_INODE, "Return refreshed attrs: size = %lu for "DFID"\n",
- (unsigned long)size, PFID(mid));
-
- body = req_capsule_server_get(&(*reqp)->rq_pill, &RMF_MDT_BODY);
- LASSERT(body != NULL);
- body->size = size;
-
- if (mreq == NULL) {
- /*
- * Very important to maintain mds num the same because
- * of revalidation. mreq == NULL means that caller has
- * no reply and the only attr we can return is size.
- */
- body->valid = OBD_MD_FLSIZE;
- }
- if (master_valid == 0) {
- oit->d.lustre.it_lock_handle = master_lockh.cookie;
- oit->d.lustre.it_lock_mode = master_lockm;
- }
- rc = 0;
- } else {
- /*
- * It seems all the attrs are fresh and we did no request.
- */
- CDEBUG(D_INODE, "All the attrs were fresh on "DFID"\n",
- PFID(mid));
- if (master_valid == 0)
- oit->d.lustre.it_lock_mode = master_lockm;
- rc = 1;
- }
-
- EXIT;
-cleanup:
- OBD_FREE_PTR(op_data);
- lmv_object_put_unlock(obj);
- return rc;
-}
-
-int lmv_allocate_slaves(struct obd_device *obd, struct lu_fid *pid,
- struct md_op_data *op, struct lu_fid *fid)
-{
- struct lmv_obd *lmv = &obd->u.lmv;
- struct lmv_object *obj;
- mdsno_t mds;
- int sidx;
- int rc;
- ENTRY;
-
- obj = lmv_object_find(obd, pid);
- if (obj == NULL)
- RETURN(-EALREADY);
-
- sidx = raw_name2idx(obj->lo_hashtype, obj->lo_objcount,
- (char *)op->op_name, op->op_namelen);
- mds = obj->lo_stripes[sidx].ls_mds;
- lmv_object_put(obj);
-
- rc = __lmv_fid_alloc(lmv, fid, mds);
- if (rc) {
- CERROR("Can't allocate fid, rc %d\n", rc);
- RETURN(rc);
- }
-
- CDEBUG(D_INODE, "Allocate new fid "DFID" for slave "
- "obj -> mds #%x\n", PFID(fid), mds);
-
- RETURN(rc);
-}