X-Git-Url: https://git.whamcloud.com/?a=blobdiff_plain;f=lustre%2Flmv%2Flmv_intent.c;h=1a7fc0a71c64852040909f10267c29d1b42b3a61;hb=41998544b8a34b3c385f2a6adb7ebc01ba496182;hp=ba8a06f4ffd70a02fe22fad6f569dfb72d60a1d9;hpb=bcb84451a79bb1fdf2b89feccd0d959147ef0c1d;p=fs%2Flustre-release.git diff --git a/lustre/lmv/lmv_intent.c b/lustre/lmv/lmv_intent.c index ba8a06f..1a7fc0a 100644 --- a/lustre/lmv/lmv_intent.c +++ b/lustre/lmv/lmv_intent.c @@ -1,27 +1,39 @@ -/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*- - * vim:expandtab:shiftwidth=8:tabstop=8: +/* + * GPL HEADER START * - * Copyright (C) 2002, 2003 Cluster File Systems, Inc. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * - * This file is part of Lustre, http://www.lustre.org. + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 only, + * as published by the Free Software Foundation. * - * Lustre is free software; you can redistribute it and/or - * modify it under the terms of version 2 of the GNU General Public - * License as published by the Free Software Foundation. + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License version 2 for more details (a copy is included + * in the LICENSE file that accompanied this code). * - * Lustre is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. + * You should have received a copy of the GNU General Public License + * version 2 along with this program; If not, see + * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf * - * You should have received a copy of the GNU General Public License - * along with Lustre; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.com if you need additional information or + * have any questions. + * + * GPL HEADER END + */ +/* + * Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved. + * Use is subject to license terms. + * + * Copyright (c) 2011, 2013, Intel Corporation. + */ +/* + * This file is part of Lustre, http://www.lustre.org/ + * Lustre is a trademark of Sun Microsystems, Inc. */ -#ifndef EXPORT_SYMTAB -# define EXPORT_SYMTAB -#endif #define DEBUG_SUBSYSTEM S_LMV #ifdef __KERNEL__ #include @@ -31,730 +43,290 @@ #include #include #include +#include +#include #else #include #endif -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include +#include +#include +#include +#include +#include +#include +#include #include "lmv_internal.h" - -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, struct ll_uctxt *uctxt, - 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; - struct ll_fid nfid; - struct lustre_handle plock; - int pmode; - - if (it->it_op == IT_LOOKUP) { - /* 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; - } - - nfid = body->fid1; - it->d.lustre.it_disposition &= ~DISP_ENQ_COMPLETE; - rc = md_intent_lock(lmv->tgts[nfid.mds].ltd_exp, uctxt, &nfid, - 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 ll_uctxt *uctxt, - struct ll_fid *pfid, const char *name, int len, - void *lmm, int lmmsize, struct ll_fid *cfid, - struct lookup_intent *it, int flags, - struct ptlrpc_request **reqp, - ldlm_blocking_callback cb_blocking) +static int lmv_intent_remote(struct obd_export *exp, void *lmm, + int lmmsize, struct lookup_intent *it, + const struct lu_fid *parent_fid, int flags, + struct ptlrpc_request **reqp, + ldlm_blocking_callback cb_blocking, + __u64 extra_lock_flags) { - struct obd_device *obd = exp->exp_obd; - struct lmv_obd *lmv = &obd->u.lmv; - struct mds_body *body = NULL; - struct ll_fid rpfid = *pfid; - struct lmv_obj *obj; - struct mea *mea; - int rc, mds; - ENTRY; - - /* IT_OPEN is intended to open (and create, possible) an object. - * parent (pfid) may be splitted dir */ - -repeat: - mds = rpfid.mds; - obj = lmv_grab_obj(obd, &rpfid, 0); - if (obj) { - /* directory is already splitted, so we have to forward - * request to the right MDS */ - mds = raw_name2idx(obj->objcount, (char *)name, len); - rpfid = obj->objs[mds].fid; - CDEBUG(D_OTHER, "forward to MDS #%u\n", mds); - } - - rc = md_intent_lock(lmv->tgts[mds].ltd_exp, uctxt, &rpfid, name, - len, lmm, lmmsize, cfid, it, flags, reqp, - cb_blocking); - lmv_put_obj(obj); - if (rc == -ERESTART) { - /* directory got splitted. time to update local object - * and repeat the request with proper MDS */ - LASSERT(fid_equal(pfid, &rpfid)); - rc = lmv_get_mea_and_update_object(exp, &rpfid); - 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, uctxt, lmm, lmmsize, it, flags, - reqp, cb_blocking); - if (rc != 0) { - LASSERT(rc < 0); - 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); - cfid = &body->fid1; - obj = lmv_grab_obj(obd, cfid, 0); - if (rc == 0 && !obj && (mea = is_body_of_splitted_dir(*reqp, 1))) { - /* wow! this is splitted dir, we'd like to handle it */ - rc = lmv_create_obj_from_attrs(exp, &body->fid1, mea); - } - obj = lmv_grab_obj(obd, cfid, 0); - if (obj) { - /* this is splitted dir and we'd want to get attrs */ - CDEBUG(D_OTHER, "attrs from slaves for %lu/%lu/%lu\n", - (unsigned long) cfid->mds, - (unsigned long) cfid->id, - (unsigned long) cfid->generation); - rc = lmv_revalidate_slaves(exp, reqp, cfid, - it, 1, cb_blocking); - } else if (S_ISDIR(body->mode)) { - /*CWARN("hmmm, %lu/%lu/%lu has not lmv obj?!\n", - (unsigned long) cfid->mds, - (unsigned long) cfid->id, - (unsigned long) cfid->generation);*/ - } - lmv_put_obj(obj); - RETURN(rc); -} - -int lmv_intent_getattr(struct obd_export *exp, struct ll_uctxt *uctxt, - struct ll_fid *pfid, const char *name, int len, - void *lmm, int lmmsize, struct ll_fid *cfid, - 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 ll_fid rpfid = *pfid; - struct lmv_obj *obj, *obj2; - struct mea *mea; - int rc = 0, mds; - ENTRY; - - if (cfid) { - /* caller wants to revalidate attrs of obj - * we have to revalidate slaves if requested - * object is splitted directory */ - CDEBUG(D_OTHER, "revalidate attrs for %lu/%lu/%lu\n", - (unsigned long) cfid->mds, - (unsigned long) cfid->id, - (unsigned long) cfid->generation); - mds = cfid->mds; - obj = lmv_grab_obj(obd, cfid, 0); - if (obj) { - /* in fact, we need not this with current - * _intent_lock(), but it may change some day */ - rpfid = obj->objs[mds].fid; - } - rc = md_intent_lock(lmv->tgts[mds].ltd_exp, uctxt, &rpfid, name, - len, lmm, lmmsize, cfid, it, flags, reqp, - cb_blocking); - 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 %lu/%lu/%lu, rc %d\n", - (unsigned long) cfid->mds, - (unsigned long) cfid->id, - (unsigned long) cfid->generation, rc); - rc = lmv_revalidate_slaves(exp, reqp, cfid, it, rc, - cb_blocking); - } - RETURN(rc); - } - - CDEBUG(D_OTHER, "INTENT getattr for %*s on %lu/%lu/%lu\n", - len, name, (unsigned long) pfid->mds, - (unsigned long) pfid->id, - (unsigned long) pfid->generation); - - mds = pfid->mds; - obj = lmv_grab_obj(obd, pfid, 0); - if (obj && len) { - /* directory is already splitted. calculate mds */ - mds = raw_name2idx(obj->objcount, (char *) name, len); - rpfid = obj->objs[mds].fid; - CDEBUG(D_OTHER, "forward to MDS #%u (slave %lu/%lu/%lu)\n", - mds, (unsigned long) rpfid.mds, - (unsigned long) rpfid.id, - (unsigned long) rpfid.generation); - } - rc = md_intent_lock(lmv->tgts[mds].ltd_exp, uctxt, &rpfid, name, - len, lmm, lmmsize, NULL, it, flags, reqp, - cb_blocking); - if (rc < 0) - RETURN(rc); - LASSERT(rc == 0); - - /* okay, MDS has returned success. probably name has been - * resolved in remote inode */ - rc = lmv_handle_remote_inode(exp, uctxt, 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); - cfid = &body->fid1; - obj2 = lmv_grab_obj(obd, cfid, 0); - - if (rc == 0 && !obj2 && (mea = is_body_of_splitted_dir(*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); - rc = lmv_create_obj_from_attrs(exp, &body->fid1, mea); - obj2 = lmv_grab_obj(obd, cfid, 0); - } - - if (obj2) { - /* this is splitted dir and we'd want to get attrs */ - CDEBUG(D_OTHER, - "attrs from slaves for %lu/%lu/%lu, rc %d\n", - (unsigned long) cfid->mds, - (unsigned long) cfid->id, - (unsigned long) cfid->generation, rc); - rc = lmv_revalidate_slaves(exp, reqp, cfid, - it, 1, cb_blocking); - } - RETURN(rc); + struct obd_device *obd = exp->exp_obd; + struct lmv_obd *lmv = &obd->u.lmv; + struct ptlrpc_request *req = NULL; + struct lustre_handle plock; + struct md_op_data *op_data; + struct lmv_tgt_desc *tgt; + struct mdt_body *body; + int pmode; + int rc = 0; + ENTRY; + + body = req_capsule_server_get(&(*reqp)->rq_pill, &RMF_MDT_BODY); + if (body == NULL) + RETURN(-EPROTO); + + LASSERT((body->valid & OBD_MD_MDS)); + + /* + * Unfortunately, we have to lie to MDC/MDS to retrieve + * attributes llite needs and provideproper locking. + */ + if (it->it_op & IT_LOOKUP) + it->it_op = IT_GETATTR; + + /* + * We got LOOKUP lock, but we really need attrs. + */ + pmode = it->d.lustre.it_lock_mode; + if (pmode) { + plock.cookie = it->d.lustre.it_lock_handle; + it->d.lustre.it_lock_mode = 0; + it->d.lustre.it_data = NULL; + } + + LASSERT(fid_is_sane(&body->fid1)); + + tgt = lmv_find_target(lmv, &body->fid1); + if (IS_ERR(tgt)) + GOTO(out, rc = PTR_ERR(tgt)); + + OBD_ALLOC_PTR(op_data); + if (op_data == NULL) + GOTO(out, rc = -ENOMEM); + + op_data->op_fid1 = body->fid1; + /* Sent the parent FID to the remote MDT */ + if (parent_fid != NULL) { + /* The parent fid is only for remote open to + * check whether the open is from OBF, + * see mdt_cross_open */ + LASSERT(it->it_op & IT_OPEN); + op_data->op_fid2 = *parent_fid; + /* Add object FID to op_fid3, in case it needs to check stale + * (M_CHECK_STALE), see mdc_finish_intent_lock */ + op_data->op_fid3 = body->fid1; + } + + op_data->op_bias = MDS_CROSS_REF; + CDEBUG(D_INODE, "REMOTE_INTENT with fid="DFID" -> mds #%d\n", + PFID(&body->fid1), tgt->ltd_idx); + + it->d.lustre.it_disposition &= ~DISP_ENQ_COMPLETE; + rc = md_intent_lock(tgt->ltd_exp, op_data, lmm, lmmsize, it, + flags, &req, cb_blocking, extra_lock_flags); + if (rc) + GOTO(out_free_op_data, rc); + + /* + * LLite needs LOOKUP lock to track dentry revocation in order to + * maintain dcache consistency. Thus drop UPDATE|PERM lock here + * and put LOOKUP in request. + */ + if (it->d.lustre.it_lock_mode != 0) { + it->d.lustre.it_remote_lock_handle = + it->d.lustre.it_lock_handle; + it->d.lustre.it_remote_lock_mode = it->d.lustre.it_lock_mode; + } + + it->d.lustre.it_lock_handle = plock.cookie; + it->d.lustre.it_lock_mode = pmode; + + EXIT; +out_free_op_data: + OBD_FREE_PTR(op_data); +out: + if (rc && pmode) + ldlm_lock_decref(&plock, pmode); + + ptlrpc_req_finished(*reqp); + *reqp = req; + return rc; } -void lmv_update_body_from_obj(struct mds_body *body, struct lmv_inode *obj) +/* + * IT_OPEN is intended to open (and create, possible) an object. Parent (pid) + * may be split dir. + */ +int lmv_intent_open(struct obd_export *exp, struct md_op_data *op_data, + void *lmm, int lmmsize, struct lookup_intent *it, + int flags, struct ptlrpc_request **reqp, + ldlm_blocking_callback cb_blocking, + __u64 extra_lock_flags) { - /* update size */ - body->size += obj->size; - - /* update atime */ - /* update ctime */ - /* update mtime */ - /* update nlink */ + struct obd_device *obd = exp->exp_obd; + struct lmv_obd *lmv = &obd->u.lmv; + struct lmv_tgt_desc *tgt; + struct mdt_body *body; + int rc; + ENTRY; + + tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid1); + if (IS_ERR(tgt)) + RETURN(PTR_ERR(tgt)); + + /* If it is ready to open the file by FID, do not need + * allocate FID at all, otherwise it will confuse MDT */ + if ((it->it_op & IT_CREAT) && + !(it->it_flags & MDS_OPEN_BY_FID)) { + /* + * For open with IT_CREATE and for IT_CREATE cases allocate new + * fid and setup FLD for it. + */ + op_data->op_fid3 = op_data->op_fid2; + rc = lmv_fid_alloc(exp, &op_data->op_fid2, op_data); + if (rc != 0) + RETURN(rc); + } + + CDEBUG(D_INODE, "OPEN_INTENT with fid1="DFID", fid2="DFID"," + " name='%s' -> mds #%d\n", PFID(&op_data->op_fid1), + PFID(&op_data->op_fid2), op_data->op_name, tgt->ltd_idx); + + rc = md_intent_lock(tgt->ltd_exp, op_data, lmm, lmmsize, it, flags, + reqp, cb_blocking, extra_lock_flags); + if (rc != 0) + RETURN(rc); + /* + * Nothing is found, do not access body->fid1 as it is zero and thus + * pointless. + */ + if ((it->d.lustre.it_disposition & DISP_LOOKUP_NEG) && + !(it->d.lustre.it_disposition & DISP_OPEN_CREATE) && + !(it->d.lustre.it_disposition & DISP_OPEN_OPEN)) + RETURN(rc); + + body = req_capsule_server_get(&(*reqp)->rq_pill, &RMF_MDT_BODY); + if (body == NULL) + RETURN(-EPROTO); + /* + * Not cross-ref case, just get out of here. + */ + if (likely(!(body->valid & OBD_MD_MDS))) + RETURN(0); + + /* + * Okay, MDS has returned success. Probably name has been resolved in + * remote inode. + */ + rc = lmv_intent_remote(exp, lmm, lmmsize, it, &op_data->op_fid1, flags, + reqp, cb_blocking, extra_lock_flags); + if (rc != 0) { + LASSERT(rc < 0); + /* + * This is possible, that some userspace application will try to + * open file as directory and we will have -ENOTDIR here. As + * this is normal situation, we should not print error here, + * only debug info. + */ + CDEBUG(D_INODE, "Can't handle remote %s: dir "DFID"("DFID"):" + "%*s: %d\n", LL_IT2STR(it), PFID(&op_data->op_fid2), + PFID(&op_data->op_fid1), op_data->op_namelen, + op_data->op_name, rc); + RETURN(rc); + } + + RETURN(rc); } -int lmv_lookup_slaves(struct obd_export *exp, struct ptlrpc_request **reqp) +/* + * Handler for: getattr, lookup and revalidate cases. + */ +int lmv_intent_lookup(struct obd_export *exp, struct md_op_data *op_data, + void *lmm, int lmmsize, struct lookup_intent *it, + int flags, struct ptlrpc_request **reqp, + ldlm_blocking_callback cb_blocking, + __u64 extra_lock_flags) { - struct obd_device *obd = exp->exp_obd; - struct lmv_obd *lmv = &obd->u.lmv; - struct mds_body *body = NULL; - struct lustre_handle *lockh; - struct ldlm_lock *lock; - struct mds_body *body2; - struct ll_uctxt uctxt; - struct lmv_obj *obj; - int i, rc = 0; - ENTRY; - - LASSERT(reqp); - LASSERT(*reqp); - - /* master is locked. we'd like to take locks on slaves - * and update attributes to be returned from the slaves - * it's important that lookup is called in two cases: - * - for first time (dcache has no such a resolving yet - * - ->d_revalidate() returned false - * last case possible only if all the objs (master and - * all slaves aren't valid */ - - body = lustre_msg_buf((*reqp)->rq_repmsg, 1, sizeof(*body)); - LASSERT(body != NULL); - - obj = lmv_grab_obj(obd, &body->fid1, 0); - LASSERT(obj); - - CDEBUG(D_OTHER, "lookup slaves for %lu/%lu/%lu\n", - (unsigned long) body->fid1.mds, - (unsigned long) body->fid1.id, - (unsigned long) body->fid1.generation); - - uctxt.gid1 = 0; - uctxt.gid2 = 0; - for (i = 0; i < obj->objcount; i++) { - struct ll_fid fid = obj->objs[i].fid; - struct ptlrpc_request *req = NULL; - struct lookup_intent it; - - if (fid_equal(&fid, &obj->fid)) { - /* skip master obj */ - continue; - } - - CDEBUG(D_OTHER, "lookup slave %lu/%lu/%lu\n", - (unsigned long) fid.mds, - (unsigned long) fid.id, - (unsigned long) fid.generation); - - /* is obj valid? */ - memset(&it, 0, sizeof(it)); - it.it_op = IT_GETATTR; - rc = md_intent_lock(lmv->tgts[fid.mds].ltd_exp, &uctxt, &fid, - NULL, 0, NULL, 0, &fid, &it, 0, &req, - lmv_dirobj_blocking_ast); - lockh = (struct lustre_handle *) &it.d.lustre.it_lock_handle; - if (rc > 0) { - /* nice, this slave is valid */ - LASSERT(req == NULL); - CDEBUG(D_OTHER, "cached\n"); - goto release_lock; - } - - if (rc < 0) { - /* error during revalidation */ - GOTO(cleanup, rc); - } - - /* rc == 0, this means we have no such a lock and can't - * think obj is still valid. lookup it again */ - LASSERT(req == NULL); - req = NULL; - memset(&it, 0, sizeof(it)); - it.it_op = IT_GETATTR; - rc = md_intent_lock(lmv->tgts[fid.mds].ltd_exp, &uctxt, &fid, - NULL, 0, NULL, 0, NULL, &it, 0, &req, - lmv_dirobj_blocking_ast); - lockh = (struct lustre_handle *) &it.d.lustre.it_lock_handle; - LASSERT(rc <= 0); - if (rc < 0) { - /* error during lookup */ - GOTO(cleanup, rc); - } - - lock = ldlm_handle2lock(lockh); - LASSERT(lock); - lock->l_ast_data = obj; - atomic_inc(&obj->count); - - body2 = lustre_msg_buf(req->rq_repmsg, 1, sizeof(*body2)); - LASSERT(body2); - - obj->objs[i].size = body2->size; - CDEBUG(D_OTHER, "fresh: %lu\n", - (unsigned long) obj->objs[i].size); - - LDLM_LOCK_PUT(lock); - - if (req) - ptlrpc_req_finished(req); -release_lock: - lmv_update_body_from_obj(body, obj->objs + i); - if (it.d.lustre.it_lock_mode) - ldlm_lock_decref(lockh, it.d.lustre.it_lock_mode); - } -cleanup: - RETURN(rc); + struct obd_device *obd = exp->exp_obd; + struct lmv_obd *lmv = &obd->u.lmv; + struct lmv_tgt_desc *tgt = NULL; + struct mdt_body *body; + int rc = 0; + ENTRY; + + tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid1); + if (IS_ERR(tgt)) + RETURN(PTR_ERR(tgt)); + + if (!fid_is_sane(&op_data->op_fid2)) + fid_zero(&op_data->op_fid2); + + CDEBUG(D_INODE, "LOOKUP_INTENT with fid1="DFID", fid2="DFID + ", name='%s' -> mds #%d\n", PFID(&op_data->op_fid1), + PFID(&op_data->op_fid2), + op_data->op_name ? op_data->op_name : "", + tgt->ltd_idx); + + op_data->op_bias &= ~MDS_CROSS_REF; + + rc = md_intent_lock(tgt->ltd_exp, op_data, lmm, lmmsize, it, + flags, reqp, cb_blocking, extra_lock_flags); + + if (rc < 0 || *reqp == NULL) + RETURN(rc); + + /* + * MDS has returned success. Probably name has been resolved in + * remote inode. Let's check this. + */ + body = req_capsule_server_get(&(*reqp)->rq_pill, &RMF_MDT_BODY); + if (body == NULL) + RETURN(-EPROTO); + /* Not cross-ref case, just get out of here. */ + if (likely(!(body->valid & OBD_MD_MDS))) + RETURN(0); + + rc = lmv_intent_remote(exp, lmm, lmmsize, it, NULL, flags, reqp, + cb_blocking, extra_lock_flags); + + RETURN(rc); } -int lmv_intent_lookup(struct obd_export *exp, struct ll_uctxt *uctxt, - struct ll_fid *pfid, const char *name, int len, - void *lmm, int lmmsize, struct ll_fid *cfid, - struct lookup_intent *it, int flags, - struct ptlrpc_request **reqp, - ldlm_blocking_callback cb_blocking) +int lmv_intent_lock(struct obd_export *exp, struct md_op_data *op_data, + void *lmm, int lmmsize, struct lookup_intent *it, + int flags, struct ptlrpc_request **reqp, + ldlm_blocking_callback cb_blocking, + __u64 extra_lock_flags) { struct obd_device *obd = exp->exp_obd; - struct lmv_obd *lmv = &obd->u.lmv; - struct mds_body *body = NULL; - struct ll_fid rpfid = *pfid; - struct lmv_obj *obj; - struct mea *mea; - int rc, mds; + int rc; ENTRY; - /* IT_LOOKUP is intended to produce name -> fid resolving - * (let's call this lookup below) or to confirm requested - * resolving is still valid (let's call this revalidation) - * cfid != NULL specifies revalidation */ - - if (cfid) { - /* this is revalidation: we have to check is LOOKUP - * lock still valid for given fid. very important - * part is that we have to choose right mds because - * namespace is per mds */ - rpfid = *pfid; - obj = lmv_grab_obj(obd, pfid, 0); - if (obj) { - mds = raw_name2idx(obj->objcount, (char *) name, len); - rpfid = obj->objs[mds].fid; - lmv_put_obj(obj); - } - mds = rpfid.mds; - CDEBUG(D_OTHER, "revalidate lookup for %lu/%lu/%lu to %d MDS\n", - (unsigned long) cfid->mds, - (unsigned long) cfid->id, - (unsigned long) cfid->generation, mds); - rc = md_intent_lock(lmv->tgts[mds].ltd_exp, uctxt, pfid, name, - len, lmm, lmmsize, cfid, it, flags, - reqp, cb_blocking); - RETURN(rc); - } - - mds = pfid->mds; -repeat: - /* this is lookup. during lookup we have to update all the - * attributes, because returned values will be put in struct - * inode */ - - obj = lmv_grab_obj(obd, pfid, 0); - if (obj && len) { - /* directory is already splitted. calculate mds */ - mds = raw_name2idx(obj->objcount, (char *) name, len); - rpfid = obj->objs[mds].fid; - lmv_put_obj(obj); - } - - rc = md_intent_lock(lmv->tgts[mds].ltd_exp, uctxt, &rpfid, name, - len, lmm, lmmsize, NULL, it, flags, reqp, - cb_blocking); - if (rc > 0) { - /* very interesting. it seems object is still valid - * but for some reason llite calls lookup, not revalidate */ - CWARN("lookup for %lu/%lu/%lu and data should be uptodate\n", - (unsigned long) rpfid.mds, - (unsigned long) rpfid.id, - (unsigned long) rpfid.generation); - LASSERT(*reqp == NULL); - RETURN(rc); - } - - if (rc == 0 && *reqp == NULL) { - /* once again, we're asked for lookup, not revalidate */ - CWARN("lookup for %lu/%lu/%lu and data should be uptodate\n", - (unsigned long) rpfid.mds, - (unsigned long) rpfid.id, - (unsigned long) rpfid.generation); - RETURN(rc); - } - - if (rc == -ERESTART) { - /* directory got splitted since last update. this shouldn't - * be becasue splitting causes lock revocation, so revalidate - * had to fail and lookup on dir had to return mea */ - CWARN("we haven't knew about directory splitting!\n"); - LASSERT(obj == NULL); - rc = lmv_create_obj_from_attrs(exp, &rpfid, NULL); - if (rc) - RETURN(rc); - goto repeat; - } - - if (rc < 0) - RETURN(rc); + LASSERT(it != NULL); + LASSERT(fid_is_sane(&op_data->op_fid1)); - /* okay, MDS has returned success. probably name has been - * resolved in remote inode */ - rc = lmv_handle_remote_inode(exp, uctxt, lmm, lmmsize, it, flags, - reqp, cb_blocking); - - if (rc == 0 && (mea = is_body_of_splitted_dir(*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); - obj = lmv_grab_obj(obd, &body->fid1, 0); - if (!obj) - rc = lmv_create_obj_from_attrs(exp, &body->fid1, mea); - lmv_put_obj(obj); - } - - RETURN(rc); -} - -int lmv_intent_lock(struct obd_export *exp, struct ll_uctxt *uctxt, - struct ll_fid *pfid, const char *name, int len, - void *lmm, int lmmsize, struct ll_fid *cfid, - struct lookup_intent *it, int flags, - struct ptlrpc_request **reqp, - ldlm_blocking_callback cb_blocking) -{ - struct obd_device *obd = exp->exp_obd; - int rc = 0; - ENTRY; - - LASSERT(it); - LASSERT(pfid); - - CDEBUG(D_OTHER, "INTENT LOCK '%s' for '%*s' on %lu/%lu -> %u\n", - LL_IT2STR(it), len, name, (unsigned long) pfid->id, - (unsigned long) pfid->generation, pfid->mds); + CDEBUG(D_INODE, "INTENT LOCK '%s' for '%*s' on "DFID"\n", + LL_IT2STR(it), op_data->op_namelen, op_data->op_name, + PFID(&op_data->op_fid1)); rc = lmv_check_connect(obd); if (rc) RETURN(rc); - if (it->it_op == IT_LOOKUP) - rc = lmv_intent_lookup(exp, uctxt, pfid, name, len, lmm, - lmmsize, cfid, it, flags, reqp, - cb_blocking); + if (it->it_op & (IT_LOOKUP | IT_GETATTR | IT_LAYOUT)) + rc = lmv_intent_lookup(exp, op_data, lmm, lmmsize, it, + flags, reqp, cb_blocking, + extra_lock_flags); else if (it->it_op & IT_OPEN) - rc = lmv_intent_open(exp, uctxt, pfid, name, len, lmm, - lmmsize, cfid, it, flags, reqp, - cb_blocking); - else if (it->it_op == IT_GETATTR || it->it_op == IT_CHDIR) - rc = lmv_intent_getattr(exp, uctxt, pfid, name, len, lmm, - lmmsize, cfid, it, flags, reqp, - cb_blocking); + rc = lmv_intent_open(exp, op_data, lmm, lmmsize, it, + flags, reqp, cb_blocking, + extra_lock_flags); else LBUG(); RETURN(rc); } - -int lmv_revalidate_slaves(struct obd_export *exp, struct ptlrpc_request **reqp, - struct ll_fid *mfid, struct lookup_intent *oit, - int master_valid, ldlm_blocking_callback cb_blocking) -{ - struct obd_device *obd = exp->exp_obd; - struct ptlrpc_request *mreq = *reqp; - struct lmv_obd *lmv = &obd->u.lmv; - struct lustre_handle master_lockh; - unsigned long size = 0; - struct ldlm_lock *lock; - struct mds_body *body; - struct ll_uctxt uctxt; - struct lmv_obj *obj; - int master_lock_mode; - int i, rc = 0; - ENTRY; - - /* we have to loop over the subobjects, check validity and update - * them from MDSs 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_grab_obj(obd, mfid, 0); - LASSERT(obj); - - master_lock_mode = 0; - uctxt.gid1 = 0; - uctxt.gid2 = 0; - for (i = 0; i < obj->objcount; i++) { - struct ll_fid fid = obj->objs[i].fid; - struct lustre_handle *lockh = NULL; - struct ptlrpc_request *req = NULL; - ldlm_blocking_callback cb; - struct lookup_intent it; - int master = 0; - - CDEBUG(D_OTHER, "revalidate subobj %lu/%lu/%lu\n", - (unsigned long) fid.mds, - (unsigned long) fid.id, - (unsigned long) fid.generation); - - memset(&it, 0, sizeof(it)); - it.it_op = IT_GETATTR; - cb = lmv_dirobj_blocking_ast; - - if (fid_equal(&fid, &obj->fid)) { - if (master_valid) { - /* lmv_intent_getattr() already checked - * validness and took the lock */ - if (mreq) { - /* it even got the reply - * refresh attrs from that reply */ - body = lustre_msg_buf(mreq->rq_repmsg, - 1,sizeof(*body)); - LASSERT(body != NULL); - goto update; - } - /* take already cached attrs into account */ - CDEBUG(D_OTHER, - "master is locked and cached\n"); - goto release_lock; - } - master = 1; - cb = cb_blocking; - } - - /* is obj valid? */ - rc = md_intent_lock(lmv->tgts[fid.mds].ltd_exp, &uctxt, &fid, - NULL, 0, NULL, 0, &fid, &it, 0, &req, cb); - lockh = (struct lustre_handle *) &it.d.lustre.it_lock_handle; - if (rc > 0) { - /* nice, this slave is valid */ - LASSERT(req == NULL); - CDEBUG(D_OTHER, "cached\n"); - goto release_lock; - } - - if (rc < 0) { - /* error during revalidation */ - GOTO(cleanup, rc); - } - - /* rc == 0, this means we have no such a lock and can't - * think obj is still valid. lookup it again */ - LASSERT(req == NULL); - req = NULL; - memset(&it, 0, sizeof(it)); - it.it_op = IT_GETATTR; - rc = md_intent_lock(lmv->tgts[fid.mds].ltd_exp, &uctxt, &fid, - NULL, 0, NULL, 0, NULL, &it, 0, &req, cb); - lockh = (struct lustre_handle *) &it.d.lustre.it_lock_handle; - LASSERT(rc <= 0); - if (rc < 0) { - /* error during lookup */ - GOTO(cleanup, rc); - } - - if (master) { - LASSERT(master_valid == 0); - /* save lock on master to be returned to the caller */ - CDEBUG(D_OTHER, "no lock on master yet\n"); - memcpy(&master_lockh, lockh, sizeof(master_lockh)); - master_lock_mode = 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); - lock->l_ast_data = obj; - atomic_inc(&obj->count); - 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); - ptlrpc_request_addref(req); - *reqp = req; - - } - - body = lustre_msg_buf(req->rq_repmsg, 1, sizeof(*body)); - LASSERT(body); - -update: - obj->objs[i].size = body->size; - CDEBUG(D_OTHER, "fresh: %lu\n", - (unsigned long) obj->objs[i].size); - - if (req) - ptlrpc_req_finished(req); -release_lock: - size += obj->objs[i].size; - if (it.d.lustre.it_lock_mode) - ldlm_lock_decref(lockh, it.d.lustre.it_lock_mode); - } - - if (*reqp) { - /* some attrs got refreshed, we have reply and it's time - * to put fresh attrs to it */ - CDEBUG(D_OTHER, "return refreshed attrs: size = %lu\n", - (unsigned long) size); - body = lustre_msg_buf((*reqp)->rq_repmsg, 1, sizeof(*body)); - LASSERT(body); - /* FIXME: what about another attributes? */ - body->size = size; - if (mreq == NULL) { - /* very important to maintain lli->mds 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; - body->mds = obj->fid.mds; - } - if (master_valid == 0) { - memcpy(&oit->d.lustre.it_lock_handle, - &master_lockh, sizeof(master_lockh)); - oit->d.lustre.it_lock_mode = master_lock_mode; - } - rc = 0; - } else { - /* it seems all the attrs are fresh and we did no request */ - CDEBUG(D_OTHER, "all the attrs were fresh\n"); - if (master_valid == 0) - oit->d.lustre.it_lock_mode = master_lock_mode; - rc = 1; - } -cleanup: - RETURN(rc); -} -