-
-static inline void lmv_drop_intent_lock(struct lookup_intent *it)
-{
- if (it->d.lustre.it_lock_mode != 0)
- ldlm_lock_decref((void *)&it->d.lustre.it_lock_handle,
- it->d.lustre.it_lock_mode);
-}
-
-int lmv_handle_remote_inode(struct obd_export *exp, void *lmm,
- int lmmsize, struct lookup_intent *it,
- int flags, struct ptlrpc_request **reqp,
- ldlm_blocking_callback cb_blocking)
-{
- struct obd_device *obd = exp->exp_obd;
- struct lmv_obd *lmv = &obd->u.lmv;
- struct mds_body *body = NULL;
- int rc = 0;
- ENTRY;
-
- body = lustre_msg_buf((*reqp)->rq_repmsg, 1, sizeof(*body));
- LASSERT(body != NULL);
-
- if (body->valid & OBD_MD_MDS) {
- /*
- * oh, MDS reports that this is remote inode case i.e. we have
- * to ask for real attrs on another MDS.
- */
- struct ptlrpc_request *req = NULL;
- struct lustre_handle plock;
- struct lustre_id nid;
- int pmode;
-
- if (it->it_op == IT_LOOKUP || it->it_op == IT_CHDIR) {
- /*
- * unfortunately, we have to lie to MDC/MDS to retrieve
- * attributes llite needs.
- */
- it->it_op = IT_GETATTR;
- }
-
- /* we got LOOKUP lock, but we really need attrs */
- pmode = it->d.lustre.it_lock_mode;
- if (pmode) {
- memcpy(&plock, &it->d.lustre.it_lock_handle,
- sizeof(plock));
- it->d.lustre.it_lock_mode = 0;
- }
-
- nid = body->id1;
- it->d.lustre.it_disposition &= ~DISP_ENQ_COMPLETE;
- rc = md_intent_lock(lmv->tgts[id_group(&nid)].ltd_exp, &nid,
- NULL, 0, lmm, lmmsize, NULL, it, flags,
- &req, cb_blocking);
-
- /*
- * llite needs LOOKUP lock to track dentry revocation in order
- * to maintain dcache consistency. Thus drop UPDATE lock here
- * and put LOOKUP in request.
- */
- if (rc == 0) {
- lmv_drop_intent_lock(it);
- memcpy(&it->d.lustre.it_lock_handle, &plock,
- sizeof(plock));
- it->d.lustre.it_lock_mode = pmode;
-
- } else if (pmode)
- ldlm_lock_decref(&plock, pmode);
-
- ptlrpc_req_finished(*reqp);
- *reqp = req;
- }
- RETURN(rc);
-}
-
-int lmv_intent_open(struct obd_export *exp, struct lustre_id *pid,
- const char *name, int len, void *lmm, int lmmsize,
- struct lustre_id *cid, struct lookup_intent *it,
- int flags, struct ptlrpc_request **reqp,
- ldlm_blocking_callback cb_blocking)
-{
- struct obd_device *obd = exp->exp_obd;
- struct lmv_obd *lmv = &obd->u.lmv;
- struct mds_body *body = NULL;
- struct lustre_id rpid = *pid;
- int rc, mds, loop = 0;
- struct lmv_obj *obj;
- struct mea *mea;
- ENTRY;
-
- /* IT_OPEN is intended to open (and create, possible) an object. Parent
- * (pid) may be splitted dir */
-
-repeat:
- LASSERT(++loop <= 2);
- mds = id_group(&rpid);
- obj = lmv_grab_obj(obd, &rpid);
- if (obj) {
- /* directory is already splitted, so we have to forward
- * request to the right MDS */
- mds = raw_name2idx(obj->hashtype, obj->objcount,
- (char *)name, len);
-
- CDEBUG(D_OTHER, "forward to MDS #%u ("DLID4")\n",
- mds, OLID4(&rpid));
- rpid = obj->objs[mds].id;
- lmv_put_obj(obj);
- }
-
- rc = md_intent_lock(lmv->tgts[id_group(&rpid)].ltd_exp, &rpid, name,
- len, lmm, lmmsize, cid, it, flags, reqp,
- cb_blocking);
- if (rc == -ERESTART) {
- /* directory got splitted. time to update local object and
- * repeat the request with proper MDS */
- LASSERT(id_equal_fid(pid, &rpid));
- rc = lmv_get_mea_and_update_object(exp, &rpid);
- if (rc == 0) {
- ptlrpc_req_finished(*reqp);
- goto repeat;
- }
- }
- if (rc != 0)
- RETURN(rc);
-
- /* okay, MDS has returned success. Probably name has been resolved in
- * remote inode */
- rc = lmv_handle_remote_inode(exp, lmm, lmmsize, it,
- flags, reqp, cb_blocking);
- if (rc != 0) {
- LASSERT(rc < 0);
-
- /*
- * this is possible, that some userspace application will try to
- * open file as directory and we will have error -20 here. As
- * this is "usual" situation, we should not print error here,
- * only debug info.
- */
- CDEBUG(D_OTHER, "can't handle remote %s: dir "DLID4"("DLID4"):"
- "%*s: %d\n", LL_IT2STR(it), OLID4(pid), OLID4(&rpid),
- len, name, rc);
- RETURN(rc);
- }
-
- /* caller may use attrs MDS returns on IT_OPEN lock request so, we have
- * to update them for splitted dir */
- body = lustre_msg_buf((*reqp)->rq_repmsg, 1, sizeof(*body));
- LASSERT(body != NULL);
-
- cid = &body->id1;
- obj = lmv_grab_obj(obd, cid);
- if (!obj && (mea = lmv_splitted_dir_body(*reqp, 1))) {
- /* wow! this is splitted dir, we'd like to handle it */
- obj = lmv_create_obj(exp, &body->id1, mea);
- if (IS_ERR(obj))
- RETURN(PTR_ERR(obj));
- }
-
- if (obj) {
- /* this is splitted dir and we'd want to get attrs */
- CDEBUG(D_OTHER, "attrs from slaves for "DLID4"\n",
- OLID4(cid));
-
- rc = lmv_revalidate_slaves(exp, reqp, cid, it, 1,
- cb_blocking);
- } else if (S_ISDIR(body->mode)) {
- CDEBUG(D_OTHER, "object "DLID4" has not lmv obj?\n",
- OLID4(cid));
- }
-
- if (obj)
- lmv_put_obj(obj);
-
- RETURN(rc);
-}
-
-int lmv_intent_getattr(struct obd_export *exp, struct lustre_id *pid,
- const char *name, int len, void *lmm, int lmmsize,
- struct lustre_id *cid, struct lookup_intent *it,
- int flags, struct ptlrpc_request **reqp,
- ldlm_blocking_callback cb_blocking)
-{
- struct obd_device *obd = exp->exp_obd;
- struct lmv_obd *lmv = &obd->u.lmv;
- struct mds_body *body = NULL;
- struct lustre_id rpid = *pid;
- struct lmv_obj *obj = NULL, *obj2 = NULL;
- struct mea *mea;
- int rc = 0, mds;
- ENTRY;
-
- if (cid) {
- /* caller wants to revalidate attrs of obj we have to revalidate
- * slaves if requested object is splitted directory */
- CDEBUG(D_OTHER, "revalidate attrs for "DLID4"\n", OLID4(cid));
- mds = id_group(cid);
-#if 0
- obj = lmv_grab_obj(obd, cid);
- if (obj) {
- /* in fact, we need not this with current intent_lock(),
- * but it may change some day */
- if (!id_equal_fid(pid, cid)){
- rpid = obj->objs[mds].id;
- mds = id_group(&rpid);
- }
- lmv_put_obj(obj);
- }
-#endif
- } else {
- CDEBUG(D_OTHER, "INTENT getattr for %*s on "DLID4"\n",
- len, name, OLID4(pid));
- mds = id_group(pid);
- obj = lmv_grab_obj(obd, pid);
- if (obj && len) {
- /* directory is already splitted. calculate mds */
- mds = raw_name2idx(obj->hashtype, obj->objcount,
- (char *)name, len);
- rpid = obj->objs[mds].id;
- mds = id_group(&rpid);
- lmv_put_obj(obj);
-
- CDEBUG(D_OTHER, "forward to MDS #%u (slave "DLID4")\n",
- mds, OLID4(&rpid));
- }
- }
- rc = md_intent_lock(lmv->tgts[mds].ltd_exp, &rpid, name,
- len, lmm, lmmsize, cid, it, flags, reqp,
- cb_blocking);
- if (rc < 0)
- RETURN(rc);
-
- if (obj && rc > 0) {
- /* this is splitted dir. In order to optimize things a
- * bit, we consider obj valid updating missing parts.
-
- * FIXME: do we need to return any lock here? It would
- * be fine if we don't. this means that nobody should
- * use UPDATE lock to notify about object * removal */
- CDEBUG(D_OTHER,
- "revalidate slaves for "DLID4", rc %d\n",
- OLID4(cid), rc);
-
- LASSERT(cid != 0);
- rc = lmv_revalidate_slaves(exp, reqp, cid, it, rc,
- cb_blocking);
- RETURN(rc);
- }
-
- if (*reqp == NULL)
- RETURN(rc);
-
- /* okay, MDS has returned success. probably name has been
- * resolved in remote inode */
- rc = lmv_handle_remote_inode(exp, lmm, lmmsize, it,
- flags, reqp, cb_blocking);
- if (rc < 0)
- RETURN(rc);
-
- body = lustre_msg_buf((*reqp)->rq_repmsg, 1, sizeof(*body));
- LASSERT(body != NULL);
-
- cid = &body->id1;
- obj2 = lmv_grab_obj(obd, cid);
-
- if (!obj2 && (mea = lmv_splitted_dir_body(*reqp, 1))) {
- /* wow! this is splitted dir, we'd like to handle it. */
- body = lustre_msg_buf((*reqp)->rq_repmsg, 1, sizeof(*body));
- LASSERT(body != NULL);
-
- obj2 = lmv_create_obj(exp, &body->id1, mea);
- if (IS_ERR(obj2))
- RETURN(PTR_ERR(obj2));
- }
-
- if (obj2) {
- /* this is splitted dir and we'd want to get attrs */
- CDEBUG(D_OTHER, "attrs from slaves for "DLID4", rc %d\n",
- OLID4(cid), rc);
-
- rc = lmv_revalidate_slaves(exp, reqp, cid, it, 1, cb_blocking);
- lmv_put_obj(obj2);
- }
- RETURN(rc);
-}
-
-void lmv_update_body_from_obj(struct mds_body *body, struct lmv_inode *obj)