X-Git-Url: https://git.whamcloud.com/?a=blobdiff_plain;f=lustre%2Flmv%2Flmv_intent.c;h=b1f071d215a455ddd2e41319dca8153766618e5e;hb=6239198fcea84d76157fc50740088f58cc8a1df7;hp=14f68b6b26254440791d2d6fefc3a400744c42ce;hpb=f50d3d56f80184bc21f729e1640422d6a2a31158;p=fs%2Flustre-release.git diff --git a/lustre/lmv/lmv_intent.c b/lustre/lmv/lmv_intent.c index 14f68b6..b1f071d 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 + * + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * - * Copyright (C) 2002, 2003, 2004, 2005, 2006 Cluster File Systems, Inc. + * 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. * - * This file is part of Lustre, http://www.lustre.org. + * 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 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. + * 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 * - * 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. + * 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. * - * 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. + * Copyright (c) 2011, 2012, 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 @@ -32,12 +44,13 @@ #include #include #include +#include #else #include #endif -#include #include +#include #include #include #include @@ -45,90 +58,84 @@ #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); - it->d.lustre.it_lock_mode = 0; - } -} - int lmv_intent_remote(struct obd_export *exp, void *lmm, int lmmsize, struct lookup_intent *it, int flags, struct ptlrpc_request **reqp, ldlm_blocking_callback cb_blocking, - int extra_lock_flags) + __u64 extra_lock_flags) { - 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 obd_export *tgt_exp; - struct mdt_body *body; - int pmode, rc = 0; - ENTRY; - - body = lustre_msg_buf((*reqp)->rq_repmsg, - DLM_REPLY_REC_OFF, sizeof(*body)); - LASSERT(body != NULL); - LASSERT(lustre_rep_swabbed(*reqp, DLM_REPLY_REC_OFF)); - - if (!(body->valid & OBD_MD_MDS)) - RETURN(0); - - /* - * oh, MDS reports that this is remote inode case i.e. we have to ask - * for real attrs on another MDS. - */ - 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) { - plock.cookie = it->d.lustre.it_lock_handle; - it->d.lustre.it_lock_mode = 0; - it->d.lustre.it_data = 0; - } - - LASSERT(fid_is_sane(&body->fid1)); + 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; + 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; - - tgt_exp = lmv_find_export(lmv, &body->fid1); - if (IS_ERR(tgt_exp)) - GOTO(out, rc = PTR_ERR(tgt_exp)); - - OBD_ALLOC_PTR(op_data); - if (op_data == NULL) - GOTO(out, rc = -ENOMEM); - - op_data->op_fid1 = body->fid1; - op_data->op_bias = MDS_CROSS_REF; - - rc = md_intent_lock(tgt_exp, op_data, lmm, lmmsize, it, flags, - &req, cb_blocking, extra_lock_flags); + 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 + * 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); - it->d.lustre.it_lock_handle = plock.cookie; - it->d.lustre.it_lock_mode = pmode; + if (it->d.lustre.it_lock_mode != 0) { + ldlm_lock_decref((void *)&it->d.lustre.it_lock_handle, + it->d.lustre.it_lock_mode); + it->d.lustre.it_lock_mode = 0; } + it->d.lustre.it_lock_handle = plock.cookie; + it->d.lustre.it_lock_mode = pmode; - OBD_FREE_PTR(op_data); EXIT; +out_free_op_data: + OBD_FREE_PTR(op_data); out: if (rc && pmode) ldlm_lock_decref(&plock, pmode); @@ -138,41 +145,6 @@ out: return rc; } -int lmv_alloc_slave_fids(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_obj *obj; - mdsno_t mds; - int mea_idx; - int rc; - ENTRY; - - obj = lmv_obj_grab(obd, pid); - if (!obj) { - CERROR("Object "DFID" should be split\n", - PFID(pid)); - RETURN(0); - } - - mea_idx = raw_name2idx(obj->lo_hashtype, obj->lo_objcount, - (char *)op->op_name, op->op_namelen); - mds = obj->lo_inodes[mea_idx].li_mds; - lmv_obj_put(obj); - - rc = __lmv_fid_alloc(lmv, fid, mds); - if (rc) { - CERROR("Can't allocate new fid, rc %d\n", - rc); - RETURN(rc); - } - - CDEBUG(D_INFO, "Allocate new fid "DFID" for split " - "obj\n", PFID(fid)); - - RETURN(rc); -} - /* * IT_OPEN is intended to open (and create, possible) an object. Parent (pid) * may be split dir. @@ -181,647 +153,148 @@ 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, - int extra_lock_flags) + __u64 extra_lock_flags) { - struct obd_device *obd = exp->exp_obd; - struct lu_fid rpid = op_data->op_fid1; - struct lmv_obd *lmv = &obd->u.lmv; - struct md_op_data *sop_data; - struct obd_export *tgt_exp; - struct lmv_stripe_md *mea; - struct mdt_body *body; - struct lmv_obj *obj; - int rc, loop = 0; - ENTRY; - - OBD_ALLOC_PTR(sop_data); - if (sop_data == NULL) - RETURN(-ENOMEM); - - /* save op_data fro repeat case */ - *sop_data = *op_data; - -repeat: - - ++loop; - LASSERT(loop <= 2); - obj = lmv_obj_grab(obd, &rpid); - if (obj) { - int mea_idx; - - /* - * Directory is already split, so we have to forward request to - * the right MDS. - */ - mea_idx = raw_name2idx(obj->lo_hashtype, obj->lo_objcount, - (char *)op_data->op_name, - op_data->op_namelen); - - rpid = obj->lo_inodes[mea_idx].li_fid; - - sop_data->op_mds = obj->lo_inodes[mea_idx].li_mds; - tgt_exp = lmv_get_export(lmv, sop_data->op_mds); - sop_data->op_bias &= ~MDS_CHECK_SPLIT; - lmv_obj_put(obj); - CDEBUG(D_OTHER, "Choose slave dir ("DFID")\n", PFID(&rpid)); - } else { - struct lmv_tgt_desc *tgt; - - sop_data->op_bias |= MDS_CHECK_SPLIT; - tgt = lmv_find_target(lmv, &rpid); - sop_data->op_mds = tgt->ltd_idx; - tgt_exp = tgt->ltd_exp; - } - if (IS_ERR(tgt_exp)) - GOTO(out_free_sop_data, rc = PTR_ERR(tgt_exp)); - - sop_data->op_fid1 = rpid; - - if (it->it_op & IT_CREAT) { - /* - * For open with IT_CREATE and for IT_CREATE cases allocate new - * fid and setup FLD for it. - */ - rc = lmv_fid_alloc(exp, &sop_data->op_fid2, sop_data); - if (rc) - GOTO(out_free_sop_data, rc); - - if (rc == -ERESTART) - goto repeat; - else if (rc) - GOTO(out_free_sop_data, rc); - } - - rc = md_intent_lock(tgt_exp, sop_data, lmm, lmmsize, it, flags, - reqp, cb_blocking, extra_lock_flags); - - if (rc == -ERESTART) { - LASSERT(*reqp != NULL); - DEBUG_REQ(D_WARNING|D_RPCTRACE, *reqp, - "Got -ERESTART during open!\n"); - ptlrpc_req_finished(*reqp); - *reqp = NULL; - it->d.lustre.it_data = 0; - - /* - * Directory got split. Time to update local object and repeat - * the request with proper MDS. - */ - LASSERT(lu_fid_eq(&op_data->op_fid1, &rpid)); - rc = lmv_handle_split(exp, &rpid); - if (rc == 0) { - /* We should reallocate child FID. */ - rc = lmv_alloc_slave_fids(obd, &rpid, op_data, - &sop_data->op_fid2); - if (rc == 0) - goto repeat; - } - } - - if (rc != 0) - GOTO(out_free_sop_data, rc); - - /* - * Okay, MDS has returned success. Probably name has been resolved in - * remote inode. - */ - rc = lmv_intent_remote(exp, lmm, lmmsize, it, 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_OTHER, "can't handle remote %s: dir "DFID"("DFID"):" - "%*s: %d\n", LL_IT2STR(it), PFID(&op_data->op_fid2), - PFID(&rpid), op_data->op_namelen, op_data->op_name, rc); - GOTO(out_free_sop_data, 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)) - GOTO(out_free_sop_data, rc = 0); - - /* caller may use attrs MDS returns on IT_OPEN lock request so, we have - * to update them for split dir */ - body = lustre_msg_buf((*reqp)->rq_repmsg, - DLM_REPLY_REC_OFF, sizeof(*body)); - LASSERT(body != NULL); - LASSERT(lustre_rep_swabbed(*reqp, DLM_REPLY_REC_OFF)); - - /* could not find object, FID is not present in response. */ - if (!(body->valid & OBD_MD_FLID)) - GOTO(out_free_sop_data, rc = 0); - - obj = lmv_obj_grab(obd, &body->fid1); - if (!obj && (mea = lmv_get_mea(*reqp, DLM_REPLY_REC_OFF))) { - /* FIXME: capability for remote! */ - /* wow! this is split dir, we'd like to handle it */ - obj = lmv_obj_create(exp, &body->fid1, mea); - if (IS_ERR(obj)) - GOTO(out_free_sop_data, rc = (int)PTR_ERR(obj)); - } - - if (obj) { - /* This is split dir and we'd want to get attrs. */ - CDEBUG(D_OTHER, "attrs from slaves for "DFID"\n", - PFID(&body->fid1)); - - rc = lmv_revalidate_slaves(exp, reqp, &body->fid1, it, 1, - cb_blocking, extra_lock_flags); - } else if (S_ISDIR(body->mode)) { - CDEBUG(D_OTHER, "object "DFID" has not lmv obj?\n", - PFID(&body->fid1)); - } - - if (obj) - lmv_obj_put(obj); - - EXIT; -out_free_sop_data: - OBD_FREE_PTR(sop_data); - return rc; -} - -int lmv_intent_getattr(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, - int extra_lock_flags) -{ - struct lmv_obj *obj = NULL, *obj2 = NULL; - struct obd_device *obd = exp->exp_obd; - struct lu_fid rpid = op_data->op_fid1; - struct lmv_obd *lmv = &obd->u.lmv; - struct md_op_data *sop_data; - struct lmv_stripe_md *mea; - struct mdt_body *body; - mdsno_t mds; - int rc = 0; - ENTRY; - - OBD_ALLOC_PTR(sop_data); - if (sop_data == NULL) - RETURN(-ENOMEM); - - /* save op_data fro repeat case */ - *sop_data = *op_data; - - if (fid_is_sane(&op_data->op_fid2)) { - /* - * Caller wants to revalidate attrs of obj we have to revalidate - * slaves if requested object is split directory. - */ - CDEBUG(D_OTHER, "revalidate attrs for "DFID"\n", - PFID(&op_data->op_fid2)); - - rc = lmv_fld_lookup(lmv, &op_data->op_fid2, &mds); - if (rc) - GOTO(out_free_sop_data, rc); -#if 0 - /* - * In fact, we do not need this with current intent_lock(), but - * it may change some day. - */ - obj = lmv_obj_grab(obd, &op_data->op_fid2); - if (obj) { - if (!lu_fid_eq(&op_data->op_fid1, &op_data->op_fid2)){ - rpid = obj->lo_inodes[mds].li_fid; - mds = obj->lo_inodes[mds].li_mds; - } - lmv_obj_put(obj); - } -#endif - } else { - CDEBUG(D_OTHER, "INTENT getattr for %*s on "DFID"\n", - op_data->op_namelen, op_data->op_name, - PFID(&op_data->op_fid1)); - - rc = lmv_fld_lookup(lmv, &op_data->op_fid1, &mds); - if (rc) - GOTO(out_free_sop_data, rc); - obj = lmv_obj_grab(obd, &op_data->op_fid1); - if (obj && op_data->op_namelen) { - int mea_idx; - - /* directory is already split. calculate mds */ - mea_idx = raw_name2idx(obj->lo_hashtype, obj->lo_objcount, - (char *)op_data->op_name, - op_data->op_namelen); - rpid = obj->lo_inodes[mea_idx].li_fid; - mds = obj->lo_inodes[mea_idx].li_mds; - sop_data->op_bias &= ~MDS_CHECK_SPLIT; - lmv_obj_put(obj); - - CDEBUG(D_OTHER, "forward to MDS #"LPU64" (slave "DFID")\n", - mds, PFID(&rpid)); - } else { - rc = lmv_fld_lookup(lmv, &op_data->op_fid1, &mds); - if (rc) - GOTO(out_free_sop_data, rc); - sop_data->op_bias |= MDS_CHECK_SPLIT; - } - } - - sop_data->op_fid1 = rpid; - - rc = md_intent_lock(lmv->tgts[mds].ltd_exp, sop_data, lmm, - lmmsize, it, flags, reqp, cb_blocking, - extra_lock_flags); - - LASSERTF(rc != -ERESTART, "GETATTR: Got unhandled -ERESTART!\n"); - if (rc < 0) - GOTO(out_free_sop_data, rc); - - if (obj && rc > 0) { - /* - * This is split 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 "DFID", rc %d\n", - PFID(&op_data->op_fid2), rc); - - LASSERT(fid_is_sane(&op_data->op_fid2)); - rc = lmv_revalidate_slaves(exp, reqp, &op_data->op_fid2, it, rc, - cb_blocking, extra_lock_flags); - GOTO(out_free_sop_data, rc); - } - - if (*reqp == NULL) - GOTO(out_free_sop_data, rc); - - /* - * okay, MDS has returned success. Probably name has been resolved in - * remote inode. - */ - rc = lmv_intent_remote(exp, lmm, lmmsize, it, flags, - reqp, cb_blocking, extra_lock_flags); - if (rc < 0) - GOTO(out_free_sop_data, 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) - GOTO(out_free_sop_data, rc = 0); - - LASSERT(*reqp); - LASSERT((*reqp)->rq_repmsg); - body = lustre_msg_buf((*reqp)->rq_repmsg, - DLM_REPLY_REC_OFF, sizeof(*body)); - LASSERT(body != NULL); - LASSERT(lustre_rep_swabbed(*reqp, DLM_REPLY_REC_OFF)); - - /* could not find object, FID is not present in response. */ - if (!(body->valid & OBD_MD_FLID)) - GOTO(out_free_sop_data, rc = 0); - - obj2 = lmv_obj_grab(obd, &body->fid1); - - if (!obj2 && (mea = lmv_get_mea(*reqp, DLM_REPLY_REC_OFF))) { - - /* FIXME remote capability! */ - /* wow! this is split dir, we'd like to handle it. */ - obj2 = lmv_obj_create(exp, &body->fid1, mea); - if (IS_ERR(obj2)) - GOTO(out_free_sop_data, rc = (int)PTR_ERR(obj2)); - } - - if (obj2) { - /* this is split dir and we'd want to get attrs */ - CDEBUG(D_OTHER, "attrs from slaves for "DFID", rc %d\n", - PFID(&body->fid1), rc); - - rc = lmv_revalidate_slaves(exp, reqp, &body->fid1, it, 1, - cb_blocking, extra_lock_flags); - lmv_obj_put(obj2); - } - - EXIT; -out_free_sop_data: - OBD_FREE_PTR(sop_data); - return rc; -} - -/* this is not used currently */ -int lmv_lookup_slaves(struct obd_export *exp, struct ptlrpc_request **reqp) -{ - struct obd_device *obd = exp->exp_obd; - struct lmv_obd *lmv = &obd->u.lmv; - struct lustre_handle *lockh; - struct md_op_data *op_data; - struct ldlm_lock *lock; - struct mdt_body *body2; - struct mdt_body *body; - 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. - */ - - OBD_ALLOC_PTR(op_data); - if (op_data == NULL) - RETURN(-ENOMEM); - - body = lustre_msg_buf((*reqp)->rq_repmsg, - DLM_REPLY_REC_OFF, sizeof(*body)); - LASSERT(body != NULL); - LASSERT(lustre_rep_swabbed(*reqp, DLM_REPLY_REC_OFF)); - - LASSERT((body->valid & OBD_MD_FLID) != 0); - obj = lmv_obj_grab(obd, &body->fid1); - LASSERT(obj != NULL); - - CDEBUG(D_OTHER, "lookup slaves for "DFID"\n", - PFID(&body->fid1)); - - lmv_obj_lock(obj); - - for (i = 0; i < obj->lo_objcount; i++) { - struct lu_fid fid = obj->lo_inodes[i].li_fid; - struct ptlrpc_request *req = NULL; - struct obd_export *tgt_exp; - struct lookup_intent it; - - if (lu_fid_eq(&fid, &obj->lo_fid)) - /* skip master obj */ - continue; - - CDEBUG(D_OTHER, "lookup slave "DFID"\n", PFID(&fid)); - - /* is obj valid? */ - memset(&it, 0, sizeof(it)); - it.it_op = IT_GETATTR; - - memset(op_data, 0, sizeof(*op_data)); - op_data->op_fid1 = fid; - op_data->op_fid2 = fid; - op_data->op_bias = MDS_CROSS_REF; - - tgt_exp = lmv_get_export(lmv, obj->lo_inodes[i].li_mds); - if (IS_ERR(tgt_exp)) - GOTO(cleanup, rc = PTR_ERR(tgt_exp)); - - rc = md_intent_lock(tgt_exp, op_data, NULL, 0, &it, 0, - &req, lmv_blocking_ast, 0); - - lockh = (struct lustre_handle *)&it.d.lustre.it_lock_handle; - if (rc > 0 && req == NULL) { - /* nice, this slave is valid */ - LASSERT(req == NULL); - CDEBUG(D_OTHER, "cached\n"); - goto release_lock; - } - - if (rc < 0) { - /* error during lookup */ - GOTO(cleanup, rc); - } - lock = ldlm_handle2lock(lockh); - LASSERT(lock); - - lock->l_ast_data = lmv_obj_get(obj); - - body2 = lustre_msg_buf(req->rq_repmsg, - DLM_REPLY_REC_OFF, sizeof(*body2)); - LASSERT(body2 != NULL); - LASSERT(lustre_rep_swabbed(req, DLM_REPLY_REC_OFF)); - - obj->lo_inodes[i].li_size = body2->size; - - CDEBUG(D_OTHER, "fresh: %lu\n", - (unsigned long)obj->lo_inodes[i].li_size); - - LDLM_LOCK_PUT(lock); - - if (req) - ptlrpc_req_finished(req); -release_lock: - lmv_update_body(body, obj->lo_inodes + i); - - if (it.d.lustre.it_lock_mode) { - ldlm_lock_decref(lockh, it.d.lustre.it_lock_mode); - it.d.lustre.it_lock_mode = 0; - } - } - - EXIT; -cleanup: - lmv_obj_unlock(obj); - lmv_obj_put(obj); - OBD_FREE_PTR(op_data); - return rc; + 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->it_op & IT_CREAT) { + /* + * 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, 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); } +/* + * 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, - int extra_lock_flags) + __u64 extra_lock_flags) { - struct obd_device *obd = exp->exp_obd; - struct lu_fid rpid = op_data->op_fid1; - struct lmv_obd *lmv = &obd->u.lmv; - struct md_op_data *sop_data; - struct lmv_stripe_md *mea; - struct mdt_body *body; - struct lmv_obj *obj; - int rc, loop = 0; - int mea_idx; - mdsno_t mds; - ENTRY; - - OBD_ALLOC_PTR(sop_data); - if (sop_data == NULL) - RETURN(-ENOMEM); - - /* save op_data fro repeat case */ - *sop_data = *op_data; - - /* - * 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) fid_is_sane(&sop_data->op_fid2) specifies - * revalidation. - */ - if (fid_is_sane(&op_data->op_fid2)) { - /* - * This is revalidate: 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. - */ - rpid = op_data->op_fid1; - obj = lmv_obj_grab(obd, &rpid); - if (obj) { - mea_idx = raw_name2idx(obj->lo_hashtype, - obj->lo_objcount, - (char *)op_data->op_name, - op_data->op_namelen); - rpid = obj->lo_inodes[mea_idx].li_fid; - mds = obj->lo_inodes[mea_idx].li_mds; - sop_data->op_bias &= ~MDS_CHECK_SPLIT; - lmv_obj_put(obj); - } else { - rc = lmv_fld_lookup(lmv, &rpid, &mds); - if (rc) - GOTO(out_free_sop_data, rc); - sop_data->op_bias |= MDS_CHECK_SPLIT; - } - - CDEBUG(D_OTHER, "revalidate lookup for "DFID" to #"LPU64" MDS\n", - PFID(&op_data->op_fid2), mds); - } else { -repeat: - ++loop; - LASSERT(loop <= 2); - - /* - * This is lookup. During lookup we have to update all the - * attributes, because returned values will be put in struct - * inode. - */ - obj = lmv_obj_grab(obd, &op_data->op_fid1); - if (obj) { - if (op_data->op_namelen) { - /* directory is already split. calculate mds */ - mea_idx = raw_name2idx(obj->lo_hashtype, - obj->lo_objcount, - (char *)op_data->op_name, - op_data->op_namelen); - rpid = obj->lo_inodes[mea_idx].li_fid; - mds = obj->lo_inodes[mea_idx].li_mds; - } - sop_data->op_bias &= ~MDS_CHECK_SPLIT; - lmv_obj_put(obj); - } else { - rc = lmv_fld_lookup(lmv, &op_data->op_fid1, &mds); - if (rc) - GOTO(out_free_sop_data, rc); - sop_data->op_bias |= MDS_CHECK_SPLIT; - } - fid_zero(&sop_data->op_fid2); - } - - sop_data->op_bias &= ~MDS_CROSS_REF; - sop_data->op_fid1 = rpid; - - rc = md_intent_lock(lmv->tgts[mds].ltd_exp, sop_data, lmm, lmmsize, - it, flags, reqp, cb_blocking, extra_lock_flags); - if (rc > 0) { - LASSERT(fid_is_sane(&op_data->op_fid2)); - /* - * Very interesting. it seems object is still valid but for some - * reason llite calls lookup, not revalidate. - */ - CDEBUG(D_OTHER, "lookup for "DFID" and data should be uptodate\n", - PFID(&rpid)); - LASSERT(*reqp == NULL); - GOTO(out_free_sop_data, rc); - } - - if (rc == 0 && *reqp == NULL) { - /* once again, we're asked for lookup, not revalidate */ - CDEBUG(D_OTHER, "lookup for "DFID" and data should be uptodate\n", - PFID(&rpid)); - GOTO(out_free_sop_data, rc); - } - - if (rc == -ERESTART) { - LASSERT(*reqp != NULL); - DEBUG_REQ(D_WARNING|D_RPCTRACE, *reqp, - "Got -ERESTART during lookup!\n"); - ptlrpc_req_finished(*reqp); - *reqp = NULL; - it->d.lustre.it_data = 0; - /* - * Directory got split since last update. This shouldn't be - * because 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); - - obj = lmv_obj_create(exp, &rpid, NULL); - if (IS_ERR(obj)) - GOTO(out_free_sop_data, rc = PTR_ERR(obj)); - lmv_obj_put(obj); - goto repeat; - } - - if (rc < 0) - GOTO(out_free_sop_data, rc); - - /* - * Okay, MDS has returned success. Probably name has been resolved in - * remote inode. - */ - rc = lmv_intent_remote(exp, lmm, lmmsize, it, flags, reqp, - cb_blocking, extra_lock_flags); - - if (rc == 0 && (mea = lmv_get_mea(*reqp, DLM_REPLY_REC_OFF))) { - /* Wow! This is split dir, we'd like to handle it. */ - body = lustre_msg_buf((*reqp)->rq_repmsg, - DLM_REPLY_REC_OFF, sizeof(*body)); - LASSERT(body != NULL); - LASSERT(lustre_rep_swabbed(*reqp, DLM_REPLY_REC_OFF)); - LASSERT((body->valid & OBD_MD_FLID) != 0); - - obj = lmv_obj_grab(obd, &body->fid1); - if (!obj) { - obj = lmv_obj_create(exp, &body->fid1, mea); - if (IS_ERR(obj)) - GOTO(out_free_sop_data, rc = (int)PTR_ERR(obj)); - } - lmv_obj_put(obj); - } - - EXIT; -out_free_sop_data: - OBD_FREE_PTR(sop_data); - 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, flags, reqp, + cb_blocking, extra_lock_flags); + + RETURN(rc); } 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, - int extra_lock_flags) + __u64 extra_lock_flags) { struct obd_device *obd = exp->exp_obd; - int rc; + int rc; ENTRY; LASSERT(it != NULL); LASSERT(fid_is_sane(&op_data->op_fid1)); - CDEBUG(D_OTHER, "INTENT LOCK '%s' for '%*s' on "DFID"\n", + 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)); @@ -829,7 +302,7 @@ int lmv_intent_lock(struct obd_export *exp, struct md_op_data *op_data, if (rc) RETURN(rc); - if (it->it_op & IT_LOOKUP) + 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); @@ -837,208 +310,7 @@ int lmv_intent_lock(struct obd_export *exp, struct md_op_data *op_data, rc = lmv_intent_open(exp, op_data, lmm, lmmsize, it, flags, reqp, cb_blocking, extra_lock_flags); - else if (it->it_op & IT_GETATTR) - rc = lmv_intent_getattr(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, - 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 ptlrpc_request *mreq = *reqp; - struct lmv_obd *lmv = &obd->u.lmv; - struct lustre_handle master_lockh; - struct obd_export *tgt_exp; - struct md_op_data *op_data; - struct ldlm_lock *lock; - unsigned long size = 0; - struct mdt_body *body; - struct lmv_obj *obj; - int master_lock_mode; - int i, rc = 0; - ENTRY; - - OBD_ALLOC_PTR(op_data); - if (op_data == NULL) - RETURN(-ENOMEM); - - /* - * 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_obj_grab(obd, mid); - LASSERT(obj != NULL); - - master_lock_mode = 0; - - lmv_obj_lock(obj); - - for (i = 0; i < obj->lo_objcount; i++) { - struct lu_fid fid = obj->lo_inodes[i].li_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 "DFID"\n", - PFID(&fid)); - - memset(op_data, 0, sizeof(*op_data)); - memset(&it, 0, sizeof(it)); - it.it_op = IT_GETATTR; - - cb = lmv_blocking_ast; - - if (lu_fid_eq(&fid, &obj->lo_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, - DLM_REPLY_REC_OFF, - sizeof(*body)); - LASSERT(body != NULL); - LASSERT(lustre_rep_swabbed( - mreq, DLM_REPLY_REC_OFF)); - 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; - } - - op_data->op_fid1 = fid; - op_data->op_fid2 = fid; - op_data->op_bias = MDS_CROSS_REF; - - /* Is obj valid? */ - tgt_exp = lmv_get_export(lmv, obj->lo_inodes[i].li_mds); - if (IS_ERR(tgt_exp)) - GOTO(cleanup, rc = PTR_ERR(tgt_exp)); - - rc = md_intent_lock(tgt_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 */ - LASSERT(req == NULL); - CDEBUG(D_OTHER, "cached\n"); - goto release_lock; - } - - if (rc < 0) - 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 != NULL); - lock->l_ast_data = lmv_obj_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); - ptlrpc_request_addref(req); - *reqp = req; - } - - body = lustre_msg_buf(req->rq_repmsg, - DLM_REPLY_REC_OFF, sizeof(*body)); - LASSERT(body != NULL); - LASSERT(lustre_rep_swabbed(req, DLM_REPLY_REC_OFF)); - -update: - obj->lo_inodes[i].li_size = body->size; - - CDEBUG(D_OTHER, "fresh: %lu\n", - (unsigned long)obj->lo_inodes[i].li_size); - - if (req) - ptlrpc_req_finished(req); -release_lock: - size += obj->lo_inodes[i].li_size; - - if (it.d.lustre.it_lock_mode) { - 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_OTHER, "return refreshed attrs: size = %lu\n", - (unsigned long)size); - - body = lustre_msg_buf((*reqp)->rq_repmsg, - DLM_REPLY_REC_OFF, sizeof(*body)); - LASSERT(body != NULL); - LASSERT(lustre_rep_swabbed(*reqp, DLM_REPLY_REC_OFF)); - - 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) { - 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; - } - - EXIT; -cleanup: - OBD_FREE_PTR(op_data); - lmv_obj_unlock(obj); - lmv_obj_put(obj); - return rc; -}