-/* -*- 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 <linux/slab.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/pagemap.h>
-#include <asm/div64.h>
+#include <linux/math64.h>
#include <linux/seq_file.h>
#include <linux/namei.h>
+#include <linux/lustre_intent.h>
#else
#include <liblustre.h>
#endif
-#include <linux/obd_support.h>
-#include <linux/lustre_lib.h>
-#include <linux/lustre_net.h>
-#include <linux/lustre_idl.h>
-#include <linux/lustre_dlm.h>
-#include <linux/lustre_mds.h>
-#include <linux/obd_class.h>
-#include <linux/obd_ost.h>
-#include <linux/lprocfs_status.h>
-#include <linux/lustre_fsfilt.h>
-#include <linux/obd_lmv.h>
-#include <linux/lustre_lite.h>
+#include <obd_support.h>
+#include <lustre/lustre_idl.h>
+#include <lustre_lib.h>
+#include <lustre_net.h>
+#include <lustre_dlm.h>
+#include <lustre_mdc.h>
+#include <obd_class.h>
+#include <lprocfs_status.h>
#include "lmv_internal.h"
-static inline void lmv_drop_intent_lock(struct lookup_intent *it)
+static int lmv_intent_remote(struct obd_export *exp, struct lookup_intent *it,
+ const struct lu_fid *parent_fid,
+ struct ptlrpc_request **reqp,
+ ldlm_blocking_callback cb_blocking,
+ __u64 extra_lock_flags)
{
- if (LUSTRE_IT(it)->it_lock_mode != 0)
- ldlm_lock_decref((void *)&LUSTRE_IT(it)->it_lock_handle,
- LUSTRE_IT(it)->it_lock_mode);
+ 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);
+
+ rc = md_intent_lock(tgt->ltd_exp, op_data, it, &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;
+ }
+
+ if (pmode) {
+ 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;
}
-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)
+#ifdef __KERNEL__
+int lmv_revalidate_slaves(struct obd_export *exp, struct mdt_body *mbody,
+ struct lmv_stripe_md *lsm,
+ ldlm_blocking_callback cb_blocking,
+ int extra_lock_flags)
{
- 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 = LUSTRE_IT(it)->it_lock_mode;
- if (pmode) {
- memcpy(&plock, &LUSTRE_IT(it)->it_lock_handle,
- sizeof(plock));
- LUSTRE_IT(it)->it_lock_mode = 0;
- }
-
- LASSERT((body->valid & OBD_MD_FID) != 0);
-
- nid = body->id1;
- LUSTRE_IT(it)->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(&LUSTRE_IT(it)->it_lock_handle, &plock,
- sizeof(plock));
- LUSTRE_IT(it)->it_lock_mode = pmode;
- } else if (pmode)
- ldlm_lock_decref(&plock, pmode);
-
- ptlrpc_req_finished(*reqp);
- *reqp = req;
- }
- RETURN(rc);
+ struct obd_device *obd = exp->exp_obd;
+ struct lmv_obd *lmv = &obd->u.lmv;
+ struct mdt_body *body;
+ struct md_op_data *op_data;
+ unsigned long size = 0;
+ unsigned long nlink = 0;
+ obd_time atime = 0;
+ obd_time ctime = 0;
+ obd_time mtime = 0;
+ int i;
+ int rc = 0;
+
+ ENTRY;
+
+ /**
+ * revalidate slaves has some problems, temporarily return,
+ * we may not need that
+ */
+ OBD_ALLOC_PTR(op_data);
+ if (op_data == NULL)
+ RETURN(-ENOMEM);
+
+ /**
+ * Loop over the stripe information, check validity and update them
+ * from MDS if needed.
+ */
+ for (i = 0; i < lsm->lsm_md_stripe_count; i++) {
+ struct lu_fid fid;
+ struct lookup_intent it = { .it_op = IT_GETATTR };
+ struct ptlrpc_request *req = NULL;
+ struct lustre_handle *lockh = NULL;
+ struct lmv_tgt_desc *tgt = NULL;
+ struct inode *inode;
+
+ fid = lsm->lsm_md_oinfo[i].lmo_fid;
+ inode = lsm->lsm_md_oinfo[i].lmo_root;
+
+ /*
+ * Prepare op_data for revalidating. Note that @fid2 shluld be
+ * defined otherwise it will go to server and take new lock
+ * which is not needed here.
+ */
+ memset(op_data, 0, sizeof(*op_data));
+ op_data->op_fid1 = fid;
+ op_data->op_fid2 = fid;
+
+ tgt = lmv_locate_mds(lmv, op_data, &fid);
+ if (IS_ERR(tgt))
+ GOTO(cleanup, rc = PTR_ERR(tgt));
+
+ CDEBUG(D_INODE, "Revalidate slave "DFID" -> mds #%d\n",
+ PFID(&fid), tgt->ltd_idx);
+
+ rc = md_intent_lock(tgt->ltd_exp, op_data, &it, &req,
+ cb_blocking, extra_lock_flags);
+ if (rc < 0)
+ GOTO(cleanup, rc);
+
+ lockh = (struct lustre_handle *)&it.d.lustre.it_lock_handle;
+ if (rc > 0 && req == NULL) {
+ /* slave inode is still valid */
+ CDEBUG(D_INODE, "slave "DFID" is still valid.\n",
+ PFID(&fid));
+ rc = 0;
+ } else {
+ /* refresh slave from server */
+ body = req_capsule_server_get(&req->rq_pill,
+ &RMF_MDT_BODY);
+ LASSERT(body != NULL);
+ if (unlikely(body->nlink < 2)) {
+ CERROR("%s: nlink %d < 2 corrupt stripe %d "DFID
+ ":" DFID"\n", obd->obd_name, body->nlink,
+ i, PFID(&lsm->lsm_md_oinfo[i].lmo_fid),
+ PFID(&lsm->lsm_md_oinfo[0].lmo_fid));
+
+ if (req != NULL)
+ ptlrpc_req_finished(req);
+
+ 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;
+ }
+
+ GOTO(cleanup, rc = -EIO);
+ }
+
+
+ i_size_write(inode, body->size);
+ set_nlink(inode, body->nlink);
+ LTIME_S(inode->i_atime) = body->atime;
+ LTIME_S(inode->i_ctime) = body->ctime;
+ LTIME_S(inode->i_mtime) = body->mtime;
+
+ if (req != NULL)
+ ptlrpc_req_finished(req);
+ }
+
+ md_set_lock_data(tgt->ltd_exp, &lockh->cookie, inode, NULL);
+
+ size += i_size_read(inode);
+
+ if (i != 0)
+ nlink += inode->i_nlink - 2;
+ else
+ nlink += inode->i_nlink;
+
+ atime = LTIME_S(inode->i_atime) > atime ?
+ LTIME_S(inode->i_atime) : atime;
+ ctime = LTIME_S(inode->i_ctime) > ctime ?
+ LTIME_S(inode->i_ctime) : ctime;
+ mtime = LTIME_S(inode->i_mtime) > mtime ?
+ LTIME_S(inode->i_mtime) : mtime;
+
+ if (it.d.lustre.it_lock_mode != 0 && lockh != NULL) {
+ ldlm_lock_decref(lockh, it.d.lustre.it_lock_mode);
+ it.d.lustre.it_lock_mode = 0;
+ }
+
+ CDEBUG(D_INODE, "i %d "DFID" size %llu, nlink %u, atime "
+ "%lu, mtime %lu, ctime %lu.\n", i, PFID(&fid),
+ i_size_read(inode), inode->i_nlink,
+ LTIME_S(inode->i_atime), LTIME_S(inode->i_mtime),
+ LTIME_S(inode->i_ctime));
+ }
+
+ /*
+ * update attr of master request.
+ */
+ CDEBUG(D_INODE, "Return refreshed attrs: size = %lu nlink %lu atime "
+ LPU64 "ctime "LPU64" mtime "LPU64" for " DFID"\n", size, nlink,
+ atime, ctime, mtime, PFID(&lsm->lsm_md_oinfo[0].lmo_fid));
+
+ if (mbody != NULL) {
+ mbody->atime = atime;
+ mbody->ctime = ctime;
+ mbody->mtime = mtime;
+ }
+cleanup:
+ OBD_FREE_PTR(op_data);
+ 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);
- }
-
- /*
- * nothing is found, do not access body->id1 as it is zero and thus
- * pointless.
- */
- if (LUSTRE_IT(it)->it_disposition & DISP_LOOKUP_NEG)
- RETURN(0);
-
- /* 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);
- LASSERT((body->valid & OBD_MD_FID) != 0);
-
- 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);
-}
+#else
-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)
+int lmv_revalidate_slaves(struct obd_export *exp, struct mdt_body *mbody,
+ struct lmv_stripe_md *lsm,
+ ldlm_blocking_callback cb_blocking,
+ int extra_lock_flags)
{
- 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));
- }
- }
-
- /* the same about fid returning. */
- 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);
-
- /*
- * nothing is found, do not access body->id1 as it is zero and thus
- * pointless.
- */
- if (LUSTRE_IT(it)->it_disposition & DISP_LOOKUP_NEG)
- RETURN(0);
-
- body = lustre_msg_buf((*reqp)->rq_repmsg, 1, sizeof(*body));
- LASSERT(body != NULL);
- LASSERT((body->valid & OBD_MD_FID) != 0);
-
- 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);
+ return 0;
}
-void lmv_update_body_from_obj(struct mds_body *body, struct lmv_inode *obj)
-{
- /* update size */
- body->size += obj->size;
-}
+#endif
-int lmv_lookup_slaves(struct obd_export *exp, struct ptlrpc_request **reqp)
+/*
+ * 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,
+ struct lookup_intent *it, 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 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);
- LASSERT((body->valid & OBD_MD_FID) != 0);
-
- obj = lmv_grab_obj(obd, &body->id1);
- LASSERT(obj != NULL);
-
- CDEBUG(D_OTHER, "lookup slaves for "DLID4"\n",
- OLID4(&body->id1));
-
- lmv_lock_obj(obj);
-
- for (i = 0; i < obj->objcount; i++) {
- struct lustre_id id = obj->objs[i].id;
- struct ptlrpc_request *req = NULL;
- struct lookup_intent it;
-
- if (id_equal_fid(&id, &obj->id))
- /* skip master obj */
- continue;
-
- CDEBUG(D_OTHER, "lookup slave "DLID4"\n", OLID4(&id));
-
- /* is obj valid? */
- memset(&it, 0, sizeof(it));
- it.it_op = IT_GETATTR;
- OBD_ALLOC(it.d.fs_data, sizeof(struct lustre_intent_data));
-
- rc = md_intent_lock(lmv->tgts[id_group(&id)].ltd_exp, &id,
- NULL, 0, NULL, 0, &id, &it, 0, &req,
- lmv_dirobj_blocking_ast);
-
- lockh = (struct lustre_handle *)&LUSTRE_IT(&it)->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) {
- OBD_FREE(it.d.fs_data, sizeof(struct lustre_intent_data));
- /* error during lookup */
- GOTO(cleanup, rc);
- }
- lock = ldlm_handle2lock(lockh);
- LASSERT(lock);
-
- lock->l_ast_data = lmv_get_obj(obj);
-
- 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 (LUSTRE_IT(&it)->it_lock_mode)
- ldlm_lock_decref(lockh, LUSTRE_IT(&it)->it_lock_mode);
- OBD_FREE(it.d.fs_data, sizeof(struct lustre_intent_data));
- }
-
- EXIT;
-cleanup:
- lmv_unlock_obj(obj);
- lmv_put_obj(obj);
- 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;
+
+ /* Note: client might open with some random flags(sanity 33b), so we can
+ * not make sure op_fid2 is being initialized with BY_FID flag */
+ if (it->it_flags & MDS_OPEN_BY_FID && fid_is_sane(&op_data->op_fid2)) {
+ if (op_data->op_mea1 != NULL) {
+ struct lmv_stripe_md *lsm = op_data->op_mea1;
+ const struct lmv_oinfo *oinfo;
+
+ oinfo = lsm_name_to_stripe_info(lsm, op_data->op_name,
+ op_data->op_namelen);
+ if (IS_ERR(oinfo))
+ RETURN(PTR_ERR(oinfo));
+ op_data->op_fid1 = oinfo->lmo_fid;
+ }
+
+ tgt = lmv_find_target(lmv, &op_data->op_fid2);
+ if (IS_ERR(tgt))
+ RETURN(PTR_ERR(tgt));
+
+ op_data->op_mds = tgt->ltd_idx;
+ } else {
+ 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(NULL, 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, it, 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 (unlikely((body->valid & OBD_MD_MDS))) {
+ rc = lmv_intent_remote(exp, it, &op_data->op_fid1, reqp,
+ cb_blocking, extra_lock_flags);
+ if (rc != 0)
+ RETURN(rc);
+
+ body = req_capsule_server_get(&(*reqp)->rq_pill, &RMF_MDT_BODY);
+ if (body == NULL)
+ RETURN(-EPROTO);
+ }
+
+ RETURN(rc);
}
-int lmv_intent_lookup(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)
+/*
+ * Handler for: getattr, lookup and revalidate cases.
+ */
+static int
+lmv_intent_lookup(struct obd_export *exp, struct md_op_data *op_data,
+ struct lookup_intent *it, 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_id rpid = *pid;
- struct lmv_obj *obj;
- struct mea *mea;
- int rc, mds, loop = 0;
- ENTRY;
-
- /*
- * IT_LOOKUP is intended to produce name -> id resolving (let's call
- * this lookup below) or to confirm requested resolving is still valid
- * (let's call this revalidation) cid != NULL specifies revalidation.
- */
- if (cid) {
- /*
- * this is revalidation: we have to check is LOOKUP lock still
- * valid for given id. Very important part is that we have to
- * choose right mds because namespace is per mds.
- */
- rpid = *pid;
- obj = lmv_grab_obj(obd, pid);
- if (obj) {
- mds = raw_name2idx(obj->hashtype, obj->objcount,
- (char *)name, len);
- rpid = obj->objs[mds].id;
- lmv_put_obj(obj);
- }
- mds = id_group(&rpid);
-
- CDEBUG(D_OTHER, "revalidate lookup for "DLID4" to %d MDS\n",
- OLID4(cid), mds);
-
- } else {
- mds = id_group(pid);
-repeat:
- 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_grab_obj(obd, pid);
- if (obj) {
- if (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);
- }
- }
- rc = md_intent_lock(lmv->tgts[mds].ltd_exp, &rpid, name,
- len, lmm, lmmsize, cid, it, flags,
- reqp, cb_blocking);
- if (rc > 0) {
- LASSERT(cid != 0);
- RETURN(rc);
- }
- if (rc > 0) {
- /* very interesting. it seems object is still valid but for some
- * reason llite calls lookup, not revalidate */
- CDEBUG(D_OTHER, "lookup for "DLID4" and data should be uptodate\n",
- OLID4(&rpid));
- LASSERT(*reqp == NULL);
- RETURN(rc);
- }
-
- if (rc == 0 && *reqp == NULL) {
- /* once again, we're asked for lookup, not revalidate */
- CDEBUG(D_OTHER, "lookup for "DLID4" and data should be uptodate\n",
- OLID4(&rpid));
- 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);
-
- obj = lmv_create_obj(exp, &rpid, NULL);
- if (IS_ERR(obj))
- RETURN(PTR_ERR(obj));
- lmv_put_obj(obj);
- 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 && (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);
- LASSERT((body->valid & OBD_MD_FID) != 0);
-
- obj = lmv_grab_obj(obd, &body->id1);
- if (!obj) {
- obj = lmv_create_obj(exp, &body->id1, mea);
- if (IS_ERR(obj))
- RETURN(PTR_ERR(obj));
- }
- lmv_put_obj(obj);
- }
-
- 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;
+ struct lmv_stripe_md *lsm = op_data->op_mea1;
+ 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 lsm=%p lsm_magic=%x\n",
+ PFID(&op_data->op_fid1), PFID(&op_data->op_fid2),
+ op_data->op_name ? op_data->op_name : "<NULL>",
+ tgt->ltd_idx, lsm, lsm == NULL ? -1 : lsm->lsm_md_magic);
+
+ op_data->op_bias &= ~MDS_CROSS_REF;
+
+ rc = md_intent_lock(tgt->ltd_exp, op_data, it, reqp, cb_blocking,
+ extra_lock_flags);
+ if (rc < 0)
+ RETURN(rc);
+
+ if (*reqp == NULL) {
+ /* If RPC happens, lsm information will be revalidated
+ * during update_inode process (see ll_update_lsm_md) */
+ if (op_data->op_mea2 != NULL) {
+ rc = lmv_revalidate_slaves(exp, NULL, op_data->op_mea2,
+ cb_blocking,
+ extra_lock_flags);
+ if (rc != 0)
+ RETURN(rc);
+ }
+ RETURN(rc);
+ } else if (it_disposition(it, DISP_LOOKUP_NEG) && lsm != NULL &&
+ lsm->lsm_md_hash_type & LMV_HASH_FLAG_MIGRATION) {
+ /* For migrating directory, if it can not find the child in
+ * the source directory(master stripe), try the targeting
+ * directory(stripe 1) */
+ tgt = lmv_find_target(lmv, &lsm->lsm_md_oinfo[1].lmo_fid);
+ if (IS_ERR(tgt))
+ RETURN(PTR_ERR(tgt));
+
+ ptlrpc_req_finished(*reqp);
+ it->d.lustre.it_data = NULL;
+ *reqp = NULL;
+
+ CDEBUG(D_INODE, "For migrating dir, try target dir "DFID"\n",
+ PFID(&lsm->lsm_md_oinfo[1].lmo_fid));
+
+ op_data->op_fid1 = lsm->lsm_md_oinfo[1].lmo_fid;
+ it->d.lustre.it_disposition &= ~DISP_ENQ_COMPLETE;
+ rc = md_intent_lock(tgt->ltd_exp, op_data, it, reqp,
+ cb_blocking, extra_lock_flags);
+ }
+ /*
+ * 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 (unlikely((body->valid & OBD_MD_MDS))) {
+ rc = lmv_intent_remote(exp, it, NULL, reqp, cb_blocking,
+ extra_lock_flags);
+ if (rc != 0)
+ RETURN(rc);
+ body = req_capsule_server_get(&(*reqp)->rq_pill, &RMF_MDT_BODY);
+ if (body == NULL)
+ RETURN(-EPROTO);
+ }
+
+ RETURN(rc);
}
-int lmv_intent_lock(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)
+int lmv_intent_lock(struct obd_export *exp, struct md_op_data *op_data,
+ struct lookup_intent *it, struct ptlrpc_request **reqp,
+ ldlm_blocking_callback cb_blocking,
+ __u64 extra_lock_flags)
{
struct obd_device *obd = exp->exp_obd;
- int rc = 0;
+ int rc;
ENTRY;
- LASSERT(it);
- LASSERT(pid);
+ LASSERT(it != NULL);
+ LASSERT(fid_is_sane(&op_data->op_fid1));
- CDEBUG(D_OTHER, "INTENT LOCK '%s' for '%*s' on %lu/%lu -> %lu\n",
- LL_IT2STR(it), len, name, (unsigned long)id_ino(pid),
- (unsigned long)id_gen(pid), (unsigned long)id_group(pid));
+ 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, pid, name, len, lmm,
- lmmsize, cid, it, flags, reqp,
- cb_blocking);
- else if (it->it_op & IT_OPEN)
- rc = lmv_intent_open(exp, pid, name, len, lmm,
- lmmsize, cid, it, flags, reqp,
- cb_blocking);
- else if (it->it_op == IT_GETATTR || it->it_op == IT_CHDIR)
- rc = lmv_intent_getattr(exp, pid, name, len, lmm,
- lmmsize, cid, it, flags, reqp,
- cb_blocking);
- else
- LBUG();
- RETURN(rc);
-}
-
-int lmv_revalidate_slaves(struct obd_export *exp, struct ptlrpc_request **reqp,
- struct lustre_id *mid, 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;
- struct ldlm_lock *lock;
- unsigned long size = 0;
- struct mds_body *body;
- struct lmv_obj *obj;
- int master_lock_mode;
- int i, rc = 0;
- ENTRY;
+ if (it->it_op & (IT_LOOKUP | IT_GETATTR | IT_LAYOUT))
+ rc = lmv_intent_lookup(exp, op_data, it, reqp, cb_blocking,
+ extra_lock_flags);
+ else if (it->it_op & IT_OPEN)
+ rc = lmv_intent_open(exp, op_data, it, reqp, cb_blocking,
+ extra_lock_flags);
+ else
+ LBUG();
- /* 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, mid);
- LASSERT(obj != NULL);
-
- master_lock_mode = 0;
-
- lmv_lock_obj(obj);
-
- for (i = 0; i < obj->objcount; i++) {
- struct lustre_id id = obj->objs[i].id;
- 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 "DLID4"\n",
- OLID4(&id));
-
- memset(&it, 0, sizeof(it));
- it.it_op = IT_GETATTR;
-
- cb = lmv_dirobj_blocking_ast;
-
- OBD_ALLOC(it.d.fs_data, sizeof(struct lustre_intent_data));
- if (id_equal_fid(&id, &obj->id)) {
- 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[id_group(&id)].ltd_exp,
- &id, NULL, 0, NULL, 0, &id, &it, 0,
- &req, cb);
- lockh = (struct lustre_handle *) &LUSTRE_IT(&it)->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) {
- OBD_FREE(it.d.fs_data, sizeof(struct lustre_intent_data));
- /* error during revalidation */
- 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 = LUSTRE_IT(&it)->it_lock_mode;
- LUSTRE_IT(&it)->it_lock_mode = 0;
- } else {
- /* this is slave. we want to control it */
- lock = ldlm_handle2lock(lockh);
- LASSERT(lock);
- lock->l_ast_data = lmv_get_obj(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, 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 (LUSTRE_IT(&it)->it_lock_mode)
- ldlm_lock_decref(lockh, LUSTRE_IT(&it)->it_lock_mode);
- OBD_FREE(it.d.fs_data, sizeof(struct lustre_intent_data));
- }
-
- 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 other attributes? */
- body->size = size;
-
- if (mreq == NULL) {
- /* very important to maintain id_group(lli->lli_id) 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 = id_group(&obj->id);
- }
- if (master_valid == 0) {
- memcpy(&LUSTRE_IT(oit)->it_lock_handle,
- &master_lockh, sizeof(master_lockh));
- LUSTRE_IT(oit)->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)
- LUSTRE_IT(oit)->it_lock_mode = master_lock_mode;
- rc = 1;
- }
-
- EXIT;
-cleanup:
- lmv_unlock_obj(obj);
- lmv_put_obj(obj);
- return rc;
+ RETURN(rc);
}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff