--- /dev/null
+/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
+ * vim:expandtab:shiftwidth=8:tabstop=8:
+ *
+ * Copyright (C) 2002, 2003 Cluster File Systems, Inc.
+ *
+ * This file is part of Lustre, http://www.lustre.org.
+ *
+ * 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.
+ *
+ * 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
+ * along with Lustre; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#ifndef EXPORT_SYMTAB
+# define EXPORT_SYMTAB
+#endif
+#define DEBUG_SUBSYSTEM S_LMV
+#ifdef __KERNEL__
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/pagemap.h>
+#include <asm/div64.h>
+#include <linux/seq_file.h>
+#include <linux/namei.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/lustre_lite.h>
+#include "lmv_internal.h"
+
+static inline void lmv_drop_intent_lock(struct lookup_intent *it)
+{
+ if (LUSTRE_IT(it)->it_lock_mode != 0)
+ ldlm_lock_decref((void *)&LUSTRE_IT(it)->it_lock_handle,
+ LUSTRE_IT(it)->it_lock_mode);
+}
+
+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)
+{
+ struct obd_device *obd = exp->exp_obd;
+ struct lmv_obd *lmv = &obd->u.lmv;
+ struct ptlrpc_request *req = NULL;
+ struct mds_body *body = NULL;
+ struct lustre_handle plock;
+ struct lustre_id nid;
+ int pmode, rc = 0;
+ ENTRY;
+
+ body = lustre_msg_buf((*reqp)->rq_repmsg, 1, sizeof(*body));
+ LASSERT(body != NULL);
+
+ 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 || 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;
+ LUSTRE_IT(it)->it_data = 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);
+}
+
+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_intent_remote(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 -ENOTDIR 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) &&
+ !(LUSTRE_IT(it)->it_disposition & DISP_OPEN_CREATE) &&
+ !(LUSTRE_IT(it)->it_disposition & DISP_OPEN_OPEN))
+ 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);
+
+ /* could not find object, FID is not present in response. */
+ if (!(body->valid & OBD_MD_FID))
+ RETURN(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);
+}
+
+int lmv_intent_getattr(struct obd_export *exp, struct lustre_id *pid,
+ const char *name, int len, void *lmm, int lmmsize,
+ struct lustre_id *cid, struct lookup_intent *it,
+ int flags, struct ptlrpc_request **reqp,
+ ldlm_blocking_callback cb_blocking)
+{
+ struct obd_device *obd = exp->exp_obd;
+ struct lmv_obd *lmv = &obd->u.lmv;
+ struct mds_body *body = NULL;
+ struct lustre_id rpid = *pid;
+ struct lmv_obj *obj = NULL, *obj2 = NULL;
+ struct mea *mea;
+ int rc = 0, mds;
+ ENTRY;
+
+ if (cid) {
+ /* caller wants to revalidate attrs of obj we have to revalidate
+ * slaves if requested object is splitted directory */
+ CDEBUG(D_OTHER, "revalidate attrs for "DLID4"\n", OLID4(cid));
+ mds = id_group(cid);
+#if 0
+ obj = lmv_grab_obj(obd, cid);
+ if (obj) {
+ /* in fact, we need not this with current intent_lock(),
+ * but it may change some day */
+ if (!id_equal_fid(pid, cid)){
+ rpid = obj->objs[mds].id;
+ mds = id_group(&rpid);
+ }
+ lmv_put_obj(obj);
+ }
+#endif
+ } else {
+ CDEBUG(D_OTHER, "INTENT getattr for %*s on "DLID4"\n",
+ len, name, OLID4(pid));
+ mds = id_group(pid);
+ obj = lmv_grab_obj(obd, pid);
+ if (obj && len) {
+ /* directory is already splitted. calculate mds */
+ mds = raw_name2idx(obj->hashtype, obj->objcount,
+ (char *)name, len);
+ rpid = obj->objs[mds].id;
+ mds = id_group(&rpid);
+ lmv_put_obj(obj);
+
+ CDEBUG(D_OTHER, "forward to MDS #%u (slave "DLID4")\n",
+ mds, OLID4(&rpid));
+ }
+ }
+
+ /* 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_intent_remote(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);
+
+ /* could not find object, FID is not present in response. */
+ if (!(body->valid & OBD_MD_FID))
+ RETURN(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);
+}
+
+void lmv_update_body_from_obj(struct mds_body *body, struct lmv_inode *obj)
+{
+ /* update size */
+ body->size += obj->size;
+}
+
+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 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));
+ if (!it.d.fs_data)
+ GOTO(cleanup, rc = -ENOMEM);
+
+ 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;
+}
+
+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)
+{
+ 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_intent_remote(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);
+}
+
+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)
+{
+ struct obd_device *obd = exp->exp_obd;
+ int rc = 0;
+ ENTRY;
+
+ LASSERT(it);
+ LASSERT(pid);
+
+ 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));
+
+ 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;
+
+ /* 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 (!it.d.fs_data)
+ GOTO(cleanup, rc = -ENOMEM);
+
+ 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;
+}
--- /dev/null
+/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
+ * vim:expandtab:shiftwidth=8:tabstop=8:
+ *
+ * Copyright (C) 2002, 2003 Cluster File Systems, Inc.
+ *
+ * This file is part of Lustre, http://www.lustre.org.
+ *
+ * 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.
+ *
+ * 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
+ * along with Lustre; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#ifndef EXPORT_SYMTAB
+# define EXPORT_SYMTAB
+#endif
+#define DEBUG_SUBSYSTEM S_LMV
+#ifdef __KERNEL__
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/pagemap.h>
+#include <asm/div64.h>
+#include <linux/seq_file.h>
+#include <linux/namei.h>
+#else
+#include <liblustre.h>
+#endif
+#include <linux/ext2_fs.h>
+
+#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/lustre_lite.h>
+#include "lmv_internal.h"
+
+/* not defined for liblustre building */
+#if !defined(ATOMIC_INIT)
+#define ATOMIC_INIT(val) { (val) }
+#endif
+
+/* object cache. */
+kmem_cache_t *obj_cache;
+atomic_t obj_cache_count = ATOMIC_INIT(0);
+
+static void lmv_activate_target(struct lmv_obd *lmv,
+ struct lmv_tgt_desc *tgt,
+ int activate)
+{
+ if (tgt->active == activate)
+ return;
+
+ tgt->active = activate;
+ lmv->desc.ld_active_tgt_count += (activate ? 1 : -1);
+}
+
+/* Error codes:
+ *
+ * -EINVAL : UUID can't be found in the LMV's target list
+ * -ENOTCONN: The UUID is found, but the target connection is bad (!)
+ * -EBADF : The UUID is found, but the OBD of the wrong type (!)
+ */
+static int lmv_set_mdc_active(struct lmv_obd *lmv, struct obd_uuid *uuid,
+ int activate)
+{
+ struct lmv_tgt_desc *tgt;
+ struct obd_device *obd;
+ int i, rc = 0;
+ ENTRY;
+
+ CDEBUG(D_INFO, "Searching in lmv %p for uuid %s (activate=%d)\n",
+ lmv, uuid->uuid, activate);
+
+ spin_lock(&lmv->lmv_lock);
+ for (i = 0, tgt = lmv->tgts; i < lmv->desc.ld_tgt_count; i++, tgt++) {
+ if (tgt->ltd_exp == NULL)
+ continue;
+
+ CDEBUG(D_INFO, "lmv idx %d is %s conn "LPX64"\n",
+ i, tgt->uuid.uuid, tgt->ltd_exp->exp_handle.h_cookie);
+
+ if (obd_uuid_equals(uuid, &tgt->uuid))
+ break;
+ }
+
+ if (i == lmv->desc.ld_tgt_count)
+ GOTO(out_lmv_lock, rc = -EINVAL);
+
+ obd = class_exp2obd(tgt->ltd_exp);
+ if (obd == NULL)
+ GOTO(out_lmv_lock, rc = -ENOTCONN);
+
+ CDEBUG(D_INFO, "Found OBD %s=%s device %d (%p) type %s at LMV idx %d\n",
+ obd->obd_name, obd->obd_uuid.uuid, obd->obd_minor, obd,
+ obd->obd_type->typ_name, i);
+ LASSERT(strcmp(obd->obd_type->typ_name, OBD_MDC_DEVICENAME) == 0);
+
+ if (tgt->active == activate) {
+ CDEBUG(D_INFO, "OBD %p already %sactive!\n", obd,
+ activate ? "" : "in");
+ GOTO(out_lmv_lock, rc);
+ }
+
+ CDEBUG(D_INFO, "Marking OBD %p %sactive\n",
+ obd, activate ? "" : "in");
+
+ lmv_activate_target(lmv, tgt, activate);
+
+ EXIT;
+
+ out_lmv_lock:
+ spin_unlock(&lmv->lmv_lock);
+ return rc;
+}
+
+static int lmv_notify(struct obd_device *obd, struct obd_device *watched,
+ int active, void *data)
+{
+ struct obd_uuid *uuid;
+ int rc;
+ ENTRY;
+
+ if (strcmp(watched->obd_type->typ_name, OBD_MDC_DEVICENAME)) {
+ CERROR("unexpected notification of %s %s!\n",
+ watched->obd_type->typ_name,
+ watched->obd_name);
+ RETURN(-EINVAL);
+ }
+ uuid = &watched->u.cli.cl_import->imp_target_uuid;
+
+ /* Set MDC as active before notifying the observer, so the observer can
+ * use the MDC normally.
+ */
+ rc = lmv_set_mdc_active(&obd->u.lmv, uuid, active);
+ if (rc) {
+ CERROR("%sactivation of %s failed: %d\n",
+ active ? "" : "de", uuid->uuid, rc);
+ RETURN(rc);
+ }
+
+ if (obd->obd_observer)
+ /* Pass the notification up the chain. */
+ rc = obd_notify(obd->obd_observer, watched, active, data);
+
+ RETURN(rc);
+}
+
+static int lmv_attach(struct obd_device *dev, obd_count len, void *data)
+{
+ struct lprocfs_static_vars lvars;
+ int rc;
+ ENTRY;
+
+ lprocfs_init_vars(lmv, &lvars);
+ rc = lprocfs_obd_attach(dev, lvars.obd_vars);
+#ifdef __KERNEL__
+ if (rc == 0) {
+ struct proc_dir_entry *entry;
+
+ entry = create_proc_entry("target_obd_status", 0444,
+ dev->obd_proc_entry);
+ if (entry == NULL)
+ RETURN(-ENOMEM);
+ entry->proc_fops = &lmv_proc_target_fops;
+ entry->data = dev;
+ }
+#endif
+ RETURN (rc);
+}
+
+static int lmv_detach(struct obd_device *dev)
+{
+ return lprocfs_obd_detach(dev);
+}
+
+/* this is fake connect function. Its purpose is to initialize lmv and say
+ * caller that everything is okay. Real connection will be performed later. */
+static int lmv_connect(struct lustre_handle *conn, struct obd_device *obd,
+ struct obd_uuid *cluuid, struct obd_connect_data *data,
+ unsigned long flags)
+{
+#ifdef __KERNEL__
+ struct proc_dir_entry *lmv_proc_dir;
+#endif
+ struct lmv_obd *lmv = &obd->u.lmv;
+ struct obd_export *exp;
+ int rc = 0;
+ ENTRY;
+
+ rc = class_connect(conn, obd, cluuid);
+ if (rc) {
+ CERROR("class_connection() returned %d\n", rc);
+ RETURN(rc);
+ }
+
+ exp = class_conn2export(conn);
+
+ /* we don't want to actually do the underlying connections more than
+ * once, so keep track. */
+ lmv->refcount++;
+ if (lmv->refcount > 1) {
+ class_export_put(exp);
+ RETURN(0);
+ }
+
+ lmv->exp = exp;
+ lmv->connected = 0;
+ lmv->cluuid = *cluuid;
+ lmv->connect_flags = flags;
+ if (data)
+ memcpy(&lmv->conn_data, data, sizeof(*data));
+
+#ifdef __KERNEL__
+ lmv_proc_dir = lprocfs_register("target_obds", obd->obd_proc_entry,
+ NULL, NULL);
+ if (IS_ERR(lmv_proc_dir)) {
+ CERROR("could not register /proc/fs/lustre/%s/%s/target_obds.",
+ obd->obd_type->typ_name, obd->obd_name);
+ lmv_proc_dir = NULL;
+ }
+#endif
+
+ /* all real clients should perform actual connection right away, because
+ * it is possible, that LMV will not have opportunity to connect
+ * targets, as MDC stuff will be called directly, for instance while
+ * reading ../mdc/../kbytesfree procfs file, etc.
+ */
+ if (flags & OBD_OPT_REAL_CLIENT)
+ rc = lmv_check_connect(obd);
+
+#ifdef __KERNEL__
+ if (rc) {
+ if (lmv_proc_dir)
+ lprocfs_remove(lmv_proc_dir);
+ }
+#endif
+
+ RETURN(rc);
+}
+
+static void lmv_set_timeouts(struct obd_device *obd)
+{
+ struct lmv_tgt_desc *tgts;
+ struct lmv_obd *lmv;
+ int i;
+
+ lmv = &obd->u.lmv;
+ if (lmv->server_timeout == 0)
+ return;
+
+ if (lmv->connected == 0)
+ return;
+
+ for (i = 0, tgts = lmv->tgts; i < lmv->desc.ld_tgt_count; i++, tgts++) {
+ if (tgts->ltd_exp == NULL)
+ continue;
+
+ obd_set_info(tgts->ltd_exp, strlen("inter_mds"),
+ "inter_mds", 0, NULL);
+ }
+}
+
+static int lmv_init_ea_size(struct obd_export *exp, int easize,
+ int cookiesize)
+{
+ struct obd_device *obd = exp->exp_obd;
+ struct lmv_obd *lmv = &obd->u.lmv;
+ int i, rc = 0, change = 0;
+ ENTRY;
+
+ if (lmv->max_easize < easize) {
+ lmv->max_easize = easize;
+ change = 1;
+ }
+ if (lmv->max_cookiesize < cookiesize) {
+ lmv->max_cookiesize = cookiesize;
+ change = 1;
+ }
+ if (change == 0)
+ RETURN(0);
+
+ if (lmv->connected == 0)
+ RETURN(0);
+
+ for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
+ if (lmv->tgts[i].ltd_exp == NULL) {
+ CWARN("%s: NULL export for %d\n", obd->obd_name, i);
+ continue;
+ }
+
+ rc = obd_init_ea_size(lmv->tgts[i].ltd_exp, easize, cookiesize);
+ if (rc) {
+ CERROR("obd_init_ea_size() failed on MDT target %d, "
+ "error %d.\n", i, rc);
+ break;
+ }
+ }
+ RETURN(rc);
+}
+
+#define MAX_STRING_SIZE 128
+
+int lmv_connect_mdc(struct obd_device *obd, struct lmv_tgt_desc *tgt)
+{
+ struct lmv_obd *lmv = &obd->u.lmv;
+ struct obd_uuid *cluuid = &lmv->cluuid;
+ struct obd_uuid lmv_mdc_uuid = { "LMV_MDC_UUID" };
+ struct lustre_handle conn = {0, };
+ struct obd_device *mdc_obd;
+ struct obd_export *mdc_exp;
+ int rc;
+#ifdef __KERNEL__
+ struct proc_dir_entry *lmv_proc_dir;
+#endif
+ ENTRY;
+
+ /* for MDS: don't connect to yourself */
+ if (obd_uuid_equals(&tgt->uuid, cluuid)) {
+ CDEBUG(D_CONFIG, "don't connect back to %s\n", cluuid->uuid);
+ /* XXX - the old code didn't increment active tgt count.
+ * should we ? */
+ RETURN(0);
+ }
+
+ mdc_obd = class_find_client_obd(&tgt->uuid, OBD_MDC_DEVICENAME,
+ &obd->obd_uuid);
+ if (!mdc_obd) {
+ CERROR("target %s not attached\n", tgt->uuid.uuid);
+ RETURN(-EINVAL);
+ }
+
+ CDEBUG(D_CONFIG, "connect to %s(%s) - %s, %s FOR %s\n",
+ mdc_obd->obd_name, mdc_obd->obd_uuid.uuid,
+ tgt->uuid.uuid, obd->obd_uuid.uuid,
+ cluuid->uuid);
+
+ if (!mdc_obd->obd_set_up) {
+ CERROR("target %s not set up\n", tgt->uuid.uuid);
+ RETURN(-EINVAL);
+ }
+
+ rc = obd_connect(&conn, mdc_obd, &lmv_mdc_uuid, &lmv->conn_data,
+ lmv->connect_flags);
+ if (rc) {
+ CERROR("target %s connect error %d\n", tgt->uuid.uuid, rc);
+ RETURN(rc);
+ }
+
+ mdc_exp = class_conn2export(&conn);
+
+ rc = obd_register_observer(mdc_obd, obd);
+ if (rc) {
+ obd_disconnect(mdc_exp, 0);
+ CERROR("target %s register_observer error %d\n",
+ tgt->uuid.uuid, rc);
+ RETURN(rc);
+ }
+
+ if (obd->obd_observer) {
+ /* tell the mds_lmv about the new target */
+ rc = obd_notify(obd->obd_observer, mdc_exp->exp_obd, 1,
+ (void *)(tgt - lmv->tgts));
+ if (rc) {
+ obd_disconnect(mdc_exp, 0);
+ RETURN(rc);
+ }
+ }
+
+ tgt->ltd_exp = mdc_exp;
+ tgt->active = 1;
+ lmv->desc.ld_active_tgt_count++;
+
+ obd_init_ea_size(tgt->ltd_exp, lmv->max_easize,
+ lmv->max_cookiesize);
+ CDEBUG(D_CONFIG, "connected to %s(%s) successfully (%d)\n",
+ mdc_obd->obd_name, mdc_obd->obd_uuid.uuid,
+ atomic_read(&obd->obd_refcount));
+
+#ifdef __KERNEL__
+ lmv_proc_dir = lprocfs_srch(obd->obd_proc_entry, "target_obds");
+ if (lmv_proc_dir) {
+ struct proc_dir_entry *mdc_symlink;
+ char name[MAX_STRING_SIZE + 1];
+
+ LASSERT(mdc_obd->obd_type != NULL);
+ LASSERT(mdc_obd->obd_type->typ_name != NULL);
+ name[MAX_STRING_SIZE] = '\0';
+ snprintf(name, MAX_STRING_SIZE, "../../../%s/%s",
+ mdc_obd->obd_type->typ_name,
+ mdc_obd->obd_name);
+ mdc_symlink = proc_symlink(mdc_obd->obd_name,
+ lmv_proc_dir, name);
+ if (mdc_symlink == NULL) {
+ CERROR("could not register LMV target "
+ "/proc/fs/lustre/%s/%s/target_obds/%s.",
+ obd->obd_type->typ_name, obd->obd_name,
+ mdc_obd->obd_name);
+ lprocfs_remove(lmv_proc_dir);
+ lmv_proc_dir = NULL;
+ }
+ }
+#endif
+ RETURN(0);
+}
+
+int lmv_add_mdc(struct obd_device *obd, struct obd_uuid *tgt_uuid)
+{
+ struct lmv_obd *lmv = &obd->u.lmv;
+ struct lmv_tgt_desc *tgt;
+ int rc = 0;
+ ENTRY;
+
+ CDEBUG(D_CONFIG, "tgt_uuid: %s.\n", tgt_uuid->uuid);
+
+ lmv_init_lock(lmv);
+
+ if (lmv->desc.ld_active_tgt_count >= LMV_MAX_TGT_COUNT) {
+ lmv_init_unlock(lmv);
+ CERROR("can't add %s, LMV module compiled for %d MDCs. "
+ "That many MDCs already configured.\n",
+ tgt_uuid->uuid, LMV_MAX_TGT_COUNT);
+ RETURN(-EINVAL);
+ }
+ if (lmv->desc.ld_tgt_count == 0) {
+ struct obd_device *mdc_obd;
+
+ mdc_obd = class_find_client_obd(tgt_uuid, OBD_MDC_DEVICENAME,
+ &obd->obd_uuid);
+ if (!mdc_obd) {
+ lmv_init_unlock(lmv);
+ CERROR("Target %s not attached\n", tgt_uuid->uuid);
+ RETURN(-EINVAL);
+ }
+
+ rc = obd_llog_init(obd, &obd->obd_llogs, mdc_obd, 0, NULL);
+ if (rc) {
+ lmv_init_unlock(lmv);
+ CERROR("lmv failed to setup llogging subsystems\n");
+ }
+ }
+ spin_lock(&lmv->lmv_lock);
+ tgt = lmv->tgts + lmv->desc.ld_tgt_count++;
+ tgt->uuid = *tgt_uuid;
+ spin_unlock(&lmv->lmv_lock);
+
+ if (lmv->connected) {
+ rc = lmv_connect_mdc(obd, tgt);
+ if (rc) {
+ spin_lock(&lmv->lmv_lock);
+ lmv->desc.ld_tgt_count--;
+ memset(tgt, 0, sizeof(*tgt));
+ spin_unlock(&lmv->lmv_lock);
+ } else {
+ int easize = sizeof(struct mea) +
+ lmv->desc.ld_tgt_count *
+ sizeof(struct lustre_id);
+ lmv_init_ea_size(obd->obd_self_export, easize, 0);
+ }
+ }
+
+ lmv_init_unlock(lmv);
+ RETURN(rc);
+}
+
+/* performs a check if passed obd is connected. If no - connect it. */
+int lmv_check_connect(struct obd_device *obd)
+{
+ struct lmv_obd *lmv = &obd->u.lmv;
+ struct lmv_tgt_desc *tgt;
+ int i, rc, easize;
+ ENTRY;
+
+ if (lmv->connected)
+ RETURN(0);
+
+ lmv_init_lock(lmv);
+ if (lmv->connected) {
+ lmv_init_unlock(lmv);
+ RETURN(0);
+ }
+
+ if (lmv->desc.ld_tgt_count == 0) {
+ CERROR("%s: no targets configured.\n", obd->obd_name);
+ RETURN(-EINVAL);
+ }
+
+ CDEBUG(D_CONFIG, "time to connect %s to %s\n",
+ lmv->cluuid.uuid, obd->obd_name);
+
+ LASSERT(lmv->tgts != NULL);
+
+ for (i = 0, tgt = lmv->tgts; i < lmv->desc.ld_tgt_count; i++, tgt++) {
+ rc = lmv_connect_mdc(obd, tgt);
+ if (rc)
+ GOTO(out_disc, rc);
+ }
+
+ lmv_set_timeouts(obd);
+ class_export_put(lmv->exp);
+ lmv->connected = 1;
+ easize = lmv->desc.ld_tgt_count * sizeof(struct lustre_id) +
+ sizeof(struct mea);
+ lmv_init_ea_size(obd->obd_self_export, easize, 0);
+ lmv_init_unlock(lmv);
+ RETURN(0);
+
+ out_disc:
+ while (i-- > 0) {
+ int rc2;
+ --tgt;
+ tgt->active = 0;
+ if (tgt->ltd_exp) {
+ --lmv->desc.ld_active_tgt_count;
+ rc2 = obd_disconnect(tgt->ltd_exp, 0);
+ if (rc2) {
+ CERROR("error: LMV target %s disconnect on "
+ "MDC idx %d: error %d\n",
+ tgt->uuid.uuid, i, rc2);
+ }
+ }
+ }
+ class_disconnect(lmv->exp, 0);
+ lmv_init_unlock(lmv);
+ RETURN(rc);
+}
+
+static int lmv_disconnect(struct obd_export *exp, unsigned long flags)
+{
+ struct obd_device *obd = class_exp2obd(exp);
+ struct lmv_obd *lmv = &obd->u.lmv;
+
+#ifdef __KERNEL__
+ struct proc_dir_entry *lmv_proc_dir;
+#endif
+ int rc, i;
+ ENTRY;
+
+ if (!lmv->tgts)
+ goto out_local;
+
+ /* Only disconnect the underlying layers on the final disconnect. */
+ lmv->refcount--;
+ if (lmv->refcount != 0)
+ goto out_local;
+
+#ifdef __KERNEL__
+ lmv_proc_dir = lprocfs_srch(obd->obd_proc_entry, "target_obds");
+#endif
+
+ for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
+ struct obd_device *mdc_obd;
+
+ if (lmv->tgts[i].ltd_exp == NULL)
+ continue;
+
+ mdc_obd = class_exp2obd(lmv->tgts[i].ltd_exp);
+
+ if (mdc_obd)
+ mdc_obd->obd_no_recov = obd->obd_no_recov;
+
+#ifdef __KERNEL__
+ if (lmv_proc_dir) {
+ struct proc_dir_entry *mdc_symlink;
+
+ mdc_symlink = lprocfs_srch(lmv_proc_dir, mdc_obd->obd_name);
+ if (mdc_symlink) {
+ lprocfs_remove(mdc_symlink);
+ } else {
+ CERROR("/proc/fs/lustre/%s/%s/target_obds/%s missing\n",
+ obd->obd_type->typ_name, obd->obd_name,
+ mdc_obd->obd_name);
+ }
+ }
+#endif
+ CDEBUG(D_OTHER, "disconnected from %s(%s) successfully\n",
+ lmv->tgts[i].ltd_exp->exp_obd->obd_name,
+ lmv->tgts[i].ltd_exp->exp_obd->obd_uuid.uuid);
+
+ obd_register_observer(lmv->tgts[i].ltd_exp->exp_obd, NULL);
+ rc = obd_disconnect(lmv->tgts[i].ltd_exp, flags);
+ if (rc) {
+ if (lmv->tgts[i].active) {
+ CERROR("Target %s disconnect error %d\n",
+ lmv->tgts[i].uuid.uuid, rc);
+ }
+ rc = 0;
+ }
+
+ lmv_activate_target(lmv, &lmv->tgts[i], 0);
+ lmv->tgts[i].ltd_exp = NULL;
+ }
+
+#ifdef __KERNEL__
+ if (lmv_proc_dir) {
+ lprocfs_remove(lmv_proc_dir);
+ } else {
+ CERROR("/proc/fs/lustre/%s/%s/target_obds missing\n",
+ obd->obd_type->typ_name, obd->obd_name);
+ }
+#endif
+
+out_local:
+ /* this is the case when no real connection is established by
+ * lmv_check_connect(). */
+ if (!lmv->connected)
+ class_export_put(exp);
+ rc = class_disconnect(exp, 0);
+ if (lmv->refcount == 0)
+ lmv->connected = 0;
+ RETURN(rc);
+}
+
+static int lmv_iocontrol(unsigned int cmd, struct obd_export *exp,
+ int len, void *karg, void *uarg)
+{
+ struct obd_device *obddev = class_exp2obd(exp);
+ struct lmv_obd *lmv = &obddev->u.lmv;
+ int i, rc = 0, set = 0;
+ ENTRY;
+
+ if (lmv->desc.ld_tgt_count == 0)
+ RETURN(-ENOTTY);
+
+ for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
+ int err;
+
+ if (lmv->tgts[i].ltd_exp == NULL)
+ continue;
+
+ err = obd_iocontrol(cmd, lmv->tgts[i].ltd_exp, len, karg, uarg);
+ if (err) {
+ if (lmv->tgts[i].active) {
+ CERROR("error: iocontrol MDC %s on MDT"
+ "idx %d: err = %d\n",
+ lmv->tgts[i].uuid.uuid, i, err);
+ if (!rc)
+ rc = err;
+ }
+ } else
+ set = 1;
+ }
+ if (!set && !rc)
+ rc = -EIO;
+
+ RETURN(rc);
+}
+
+static int lmv_setup(struct obd_device *obd, obd_count len, void *buf)
+{
+ struct lmv_obd *lmv = &obd->u.lmv;
+ struct lustre_cfg *lcfg = buf;
+ struct lmv_desc *desc;
+ int rc = 0;
+ ENTRY;
+
+ if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) {
+ CERROR("LMV setup requires a descriptor\n");
+ RETURN(-EINVAL);
+ }
+
+ desc = (struct lmv_desc *)lustre_cfg_buf(lcfg, 1);
+ if (sizeof(*desc) > LUSTRE_CFG_BUFLEN(lcfg, 1)) {
+ CERROR("descriptor size wrong: %d > %d\n",
+ (int)sizeof(*desc), LUSTRE_CFG_BUFLEN(lcfg, 1));
+ RETURN(-EINVAL);
+ }
+
+ lmv->tgts_size = LMV_MAX_TGT_COUNT * sizeof(struct lmv_tgt_desc);
+
+ OBD_ALLOC(lmv->tgts, lmv->tgts_size);
+ if (lmv->tgts == NULL) {
+ CERROR("Out of memory\n");
+ RETURN(-ENOMEM);
+ }
+
+ obd_str2uuid(&lmv->desc.ld_uuid, desc->ld_uuid.uuid);
+ lmv->desc.ld_tgt_count = 0;
+ lmv->desc.ld_active_tgt_count = 0;
+ lmv->max_cookiesize = 0;
+ lmv->max_easize = 0;
+
+ spin_lock_init(&lmv->lmv_lock);
+ sema_init(&lmv->init_sem, 1);
+
+ rc = lmv_setup_mgr(obd);
+ if (rc) {
+ CERROR("Can't setup LMV object manager, "
+ "error %d.\n", rc);
+ OBD_FREE(lmv->tgts, lmv->tgts_size);
+ RETURN(rc);
+ }
+
+ RETURN(rc);
+}
+
+static int lmv_cleanup(struct obd_device *obd, int flags)
+{
+ struct lmv_obd *lmv = &obd->u.lmv;
+ ENTRY;
+
+ lmv_cleanup_mgr(obd);
+ OBD_FREE(lmv->tgts, lmv->tgts_size);
+
+ RETURN(0);
+}
+static int lmv_process_config(struct obd_device *obd, obd_count len, void *buf)
+{
+ struct lustre_cfg *lcfg = buf;
+ struct obd_uuid tgt_uuid;
+ int rc;
+ ENTRY;
+
+ switch(lcfg->lcfg_command) {
+ case LCFG_LMV_ADD_MDC:
+ if (LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(tgt_uuid.uuid))
+ GOTO(out, rc = -EINVAL);
+
+ obd_str2uuid(&tgt_uuid, lustre_cfg_string(lcfg, 1));
+ rc = lmv_add_mdc(obd, &tgt_uuid);
+ GOTO(out, rc);
+ default: {
+ CERROR("Unknown command: %d\n", lcfg->lcfg_command);
+ GOTO(out, rc = -EINVAL);
+ }
+ }
+out:
+ RETURN(rc);
+}
+
+static int lmv_statfs(struct obd_device *obd, struct obd_statfs *osfs,
+ unsigned long max_age)
+{
+ struct lmv_obd *lmv = &obd->u.lmv;
+ struct obd_statfs *temp;
+ int rc = 0, i;
+ ENTRY;
+
+ rc = lmv_check_connect(obd);
+ if (rc)
+ RETURN(rc);
+
+ OBD_ALLOC(temp, sizeof(*temp));
+ if (temp == NULL)
+ RETURN(-ENOMEM);
+
+ for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
+ if (lmv->tgts[i].ltd_exp == NULL)
+ continue;
+
+ rc = obd_statfs(lmv->tgts[i].ltd_exp->exp_obd, temp, max_age);
+ if (rc) {
+ CERROR("can't stat MDS #%d (%s), error %d\n", i,
+ lmv->tgts[i].ltd_exp->exp_obd->obd_name,
+ rc);
+ GOTO(out_free_temp, rc);
+ }
+ if (i == 0) {
+ memcpy(osfs, temp, sizeof(*temp));
+ } else {
+ osfs->os_bavail += temp->os_bavail;
+ osfs->os_blocks += temp->os_blocks;
+ osfs->os_ffree += temp->os_ffree;
+ osfs->os_files += temp->os_files;
+ }
+ }
+
+ EXIT;
+out_free_temp:
+ OBD_FREE(temp, sizeof(*temp));
+ return rc;
+}
+
+static int lmv_getstatus(struct obd_export *exp, struct lustre_id *id)
+{
+ struct obd_device *obd = exp->exp_obd;
+ struct lmv_obd *lmv = &obd->u.lmv;
+ int rc;
+ ENTRY;
+
+ rc = lmv_check_connect(obd);
+ if (rc)
+ RETURN(rc);
+
+ rc = md_getstatus(lmv->tgts[0].ltd_exp, id);
+ id_group(id) = 0;
+
+ RETURN(rc);
+}
+
+static int lmv_getattr(struct obd_export *exp, struct lustre_id *id,
+ __u64 valid, const char *xattr_name,
+ const void *xattr_data, unsigned int xattr_datalen,
+ unsigned int ea_size, struct obd_capa *ocapa,
+ struct ptlrpc_request **request)
+{
+ struct obd_device *obd = exp->exp_obd;
+ struct lmv_obd *lmv = &obd->u.lmv;
+ int rc, i = id_group(id);
+ struct lmv_obj *obj;
+ ENTRY;
+
+ rc = lmv_check_connect(obd);
+ if (rc)
+ RETURN(rc);
+
+ LASSERT(i < lmv->desc.ld_tgt_count);
+
+
+ rc = md_getattr(lmv->tgts[i].ltd_exp, id, valid,
+ xattr_name, xattr_data, xattr_datalen,
+ ea_size, ocapa, request);
+ if (rc)
+ RETURN(rc);
+
+ obj = lmv_grab_obj(obd, id);
+
+ CDEBUG(D_OTHER, "GETATTR for "DLID4" %s\n",
+ OLID4(id), obj ? "(splitted)" : "");
+
+ /*
+ * if object is splitted, then we loop over all the slaves and gather
+ * size attribute. In ideal world we would have to gather also mds field
+ * from all slaves, as object is spread over the cluster and this is
+ * definitely interesting information and it is not good to loss it,
+ * but...
+ */
+ if (obj) {
+ struct mds_body *body;
+
+ if (*request == NULL) {
+ lmv_put_obj(obj);
+ RETURN(rc);
+ }
+
+ body = lustre_msg_buf((*request)->rq_repmsg, 0,
+ sizeof(*body));
+ LASSERT(body != NULL);
+
+ lmv_lock_obj(obj);
+
+ for (i = 0; i < obj->objcount; i++) {
+
+ if (lmv->tgts[i].ltd_exp == NULL) {
+ CWARN("%s: NULL export for %d\n",
+ obd->obd_name, i);
+ continue;
+ }
+
+ /* skip master obj. */
+ if (id_equal_fid(&obj->id, &obj->objs[i].id))
+ continue;
+
+ body->size += obj->objs[i].size;
+ }
+
+ lmv_unlock_obj(obj);
+ lmv_put_obj(obj);
+ }
+
+ RETURN(rc);
+}
+
+static int lmv_access_check(struct obd_export *exp,
+ struct lustre_id *id,
+ struct ptlrpc_request **request)
+{
+ struct obd_device *obd = exp->exp_obd;
+ struct lmv_obd *lmv = &obd->u.lmv;
+ int rc, i = id_group(id);
+ ENTRY;
+
+ rc = lmv_check_connect(obd);
+ if (rc)
+ RETURN(rc);
+
+ LASSERT(i < lmv->desc.ld_tgt_count);
+ rc = md_access_check(lmv->tgts[i].ltd_exp, id, request);
+ RETURN(rc);
+}
+
+static int lmv_change_cbdata(struct obd_export *exp,
+ struct lustre_id *id,
+ ldlm_iterator_t it,
+ void *data)
+{
+ struct obd_device *obd = exp->exp_obd;
+ struct lmv_obd *lmv = &obd->u.lmv;
+ int i, rc;
+ ENTRY;
+
+ rc = lmv_check_connect(obd);
+ if (rc)
+ RETURN(rc);
+
+ CDEBUG(D_OTHER, "CBDATA for "DLID4"\n", OLID4(id));
+ LASSERT(id_group(id) < lmv->desc.ld_tgt_count);
+
+ /* with CMD every object can have two locks in different
+ * namespaces: lookup lock in space of mds storing direntry
+ * and update/open lock in space of mds storing inode */
+ for (i = 0; i < lmv->desc.ld_tgt_count; i++)
+ md_change_cbdata(lmv->tgts[i].ltd_exp, id, it, data);
+
+ RETURN(0);
+}
+
+static int lmv_change_cbdata_name(struct obd_export *exp,
+ struct lustre_id *pid,
+ char *name, int len,
+ struct lustre_id *cid,
+ ldlm_iterator_t it,
+ void *data)
+{
+ struct obd_device *obd = exp->exp_obd;
+ struct lmv_obd *lmv = &obd->u.lmv;
+ struct lustre_id rcid = *cid;
+ struct lmv_obj *obj;
+ int rc = 0, mds;
+ ENTRY;
+
+ rc = lmv_check_connect(obd);
+ if (rc)
+ RETURN(rc);
+
+ LASSERT(id_group(pid) < lmv->desc.ld_tgt_count);
+ LASSERT(id_group(cid) < lmv->desc.ld_tgt_count);
+
+ CDEBUG(D_OTHER, "CBDATA for "DLID4":%*s -> "DLID4"\n",
+ OLID4(pid), len, name, OLID4(cid));
+
+ /* this is default mds for directory name belongs to. */
+ mds = id_group(pid);
+ obj = lmv_grab_obj(obd, pid);
+ if (obj) {
+ /* directory is splitted. look for right mds for this name. */
+ mds = raw_name2idx(obj->hashtype, obj->objcount, name, len);
+ rcid = obj->objs[mds].id;
+ mds = id_group(&rcid);
+ lmv_put_obj(obj);
+ }
+ rc = md_change_cbdata(lmv->tgts[mds].ltd_exp, &rcid, it, data);
+ RETURN(rc);
+}
+
+static int lmv_valid_attrs(struct obd_export *exp, struct lustre_id *id)
+{
+ struct obd_device *obd = exp->exp_obd;
+ struct lmv_obd *lmv = &obd->u.lmv;
+ int rc = 0;
+ ENTRY;
+
+ rc = lmv_check_connect(obd);
+ if (rc)
+ RETURN(rc);
+
+ CDEBUG(D_OTHER, "validate "DLID4"\n", OLID4(id));
+ LASSERT(id_group(id) < lmv->desc.ld_tgt_count);
+ rc = md_valid_attrs(lmv->tgts[id_group(id)].ltd_exp, id);
+ RETURN(rc);
+}
+
+static int lmv_close(struct obd_export *exp, struct mdc_op_data *op_data,
+ struct obd_client_handle *och,
+ struct ptlrpc_request **request)
+{
+ struct obd_device *obd = exp->exp_obd;
+ struct lmv_obd *lmv = &obd->u.lmv;
+ int rc, i = id_group(&op_data->id1);
+ ENTRY;
+
+ rc = lmv_check_connect(obd);
+ if (rc)
+ RETURN(rc);
+
+ LASSERT(i < lmv->desc.ld_tgt_count);
+ CDEBUG(D_OTHER, "CLOSE "DLID4"\n", OLID4(&op_data->id1));
+ rc = md_close(lmv->tgts[i].ltd_exp, op_data, och, request);
+ RETURN(rc);
+}
+
+int lmv_get_mea_and_update_object(struct obd_export *exp,
+ struct lustre_id *id)
+{
+ struct obd_device *obd = exp->exp_obd;
+ struct lmv_obd *lmv = &obd->u.lmv;
+ struct ptlrpc_request *req = NULL;
+ struct lmv_obj *obj;
+ struct lustre_md md;
+ int mealen, rc;
+ __u64 valid;
+ ENTRY;
+
+ md.mea = NULL;
+ mealen = MEA_SIZE_LMV(lmv);
+
+ valid = OBD_MD_FLEASIZE | OBD_MD_FLDIREA | OBD_MD_MEA;
+
+ /* time to update mea of parent id */
+ rc = md_getattr(lmv->tgts[id_group(id)].ltd_exp,
+ id, valid, NULL, NULL, 0, mealen, NULL, &req);
+ if (rc) {
+ CERROR("md_getattr() failed, error %d\n", rc);
+ GOTO(cleanup, rc);
+ }
+
+ rc = mdc_req2lustre_md(exp, req, 0, NULL, &md);
+ if (rc) {
+ CERROR("mdc_req2lustre_md() failed, error %d\n", rc);
+ GOTO(cleanup, rc);
+ }
+
+ if (md.mea == NULL)
+ GOTO(cleanup, rc = -ENODATA);
+
+ obj = lmv_create_obj(exp, id, md.mea);
+ if (IS_ERR(obj))
+ rc = PTR_ERR(obj);
+ else
+ lmv_put_obj(obj);
+
+ obd_free_memmd(exp, (struct lov_stripe_md **)&md.mea);
+
+ EXIT;
+cleanup:
+ if (req)
+ ptlrpc_req_finished(req);
+ return rc;
+}
+
+int lmv_create(struct obd_export *exp, struct mdc_op_data *op_data,
+ const void *data, int datalen, int mode, __u32 uid,
+ __u32 gid, __u64 rdev, struct ptlrpc_request **request)
+{
+ struct obd_device *obd = exp->exp_obd;
+ struct lmv_obd *lmv = &obd->u.lmv;
+ struct mds_body *body;
+ struct lmv_obj *obj;
+ int rc, mds, loop = 0;
+ ENTRY;
+
+ rc = lmv_check_connect(obd);
+ if (rc)
+ RETURN(rc);
+
+ if (!lmv->desc.ld_active_tgt_count)
+ RETURN(-EIO);
+repeat:
+ LASSERT(++loop <= 2);
+ obj = lmv_grab_obj(obd, &op_data->id1);
+ if (obj) {
+ mds = raw_name2idx(obj->hashtype, obj->objcount,
+ op_data->name, op_data->namelen);
+ op_data->id1 = obj->objs[mds].id;
+ lmv_put_obj(obj);
+ }
+
+ CDEBUG(D_OTHER, "CREATE '%*s' on "DLID4"\n", op_data->namelen,
+ op_data->name, OLID4(&op_data->id1));
+
+ rc = md_create(lmv->tgts[id_group(&op_data->id1)].ltd_exp,
+ op_data, data, datalen, mode, uid, gid, rdev,
+ request);
+ if (rc == 0) {
+ if (*request == NULL)
+ RETURN(rc);
+
+ body = lustre_msg_buf((*request)->rq_repmsg, 0,
+ sizeof(*body));
+ if (body == NULL)
+ RETURN(-ENOMEM);
+
+ CDEBUG(D_OTHER, "created. "DLID4"\n", OLID4(&op_data->id1));
+ } else if (rc == -ERESTART) {
+ /*
+ * directory got splitted. time to update local object and
+ * repeat the request with proper MDS.
+ */
+ rc = lmv_get_mea_and_update_object(exp, &op_data->id1);
+ if (rc == 0) {
+ ptlrpc_req_finished(*request);
+ goto repeat;
+ }
+ }
+ RETURN(rc);
+}
+
+static int lmv_done_writing(struct obd_export *exp, struct obdo *obdo)
+{
+ struct obd_device *obd = exp->exp_obd;
+ struct lmv_obd *lmv = &obd->u.lmv;
+ int rc;
+ ENTRY;
+
+ rc = lmv_check_connect(obd);
+ if (rc)
+ RETURN(rc);
+
+ /* FIXME: choose right MDC here */
+ CWARN("this method isn't implemented yet\n");
+ rc = md_done_writing(lmv->tgts[0].ltd_exp, obdo);
+ RETURN(rc);
+}
+
+static int
+lmv_enqueue_slaves(struct obd_export *exp, int locktype,
+ struct lookup_intent *it, int lockmode,
+ struct mdc_op_data *data, struct lustre_handle *lockh,
+ void *lmm, int lmmsize, ldlm_completion_callback cb_compl,
+ ldlm_blocking_callback cb_blocking, void *cb_data)
+{
+ struct obd_device *obd = exp->exp_obd;
+ struct lmv_obd *lmv = &obd->u.lmv;
+ struct mea *mea = data->mea1;
+ struct mdc_op_data *data2;
+ int i, rc, mds;
+ ENTRY;
+
+ OBD_ALLOC(data2, sizeof(*data2));
+ if (data2 == NULL)
+ RETURN(-ENOMEM);
+
+ LASSERT(mea != NULL);
+ for (i = 0; i < mea->mea_count; i++) {
+ memset(data2, 0, sizeof(*data2));
+ data2->id1 = mea->mea_ids[i];
+ mds = id_group(&data2->id1);
+
+ if (lmv->tgts[mds].ltd_exp == NULL)
+ continue;
+
+ rc = md_enqueue(lmv->tgts[mds].ltd_exp, locktype, it,
+ lockmode, data2, lockh + i, lmm, lmmsize,
+ cb_compl, cb_blocking, cb_data);
+
+ CDEBUG(D_OTHER, "take lock on slave "DLID4" -> %d/%d\n",
+ OLID4(&mea->mea_ids[i]), rc, LUSTRE_IT(it)->it_status);
+ if (rc)
+ GOTO(cleanup, rc);
+ if (LUSTRE_IT(it)->it_data) {
+ struct ptlrpc_request *req;
+ req = (struct ptlrpc_request *) LUSTRE_IT(it)->it_data;
+ ptlrpc_req_finished(req);
+ }
+
+ if (LUSTRE_IT(it)->it_status)
+ GOTO(cleanup, rc = LUSTRE_IT(it)->it_status);
+ }
+
+ OBD_FREE(data2, sizeof(*data2));
+ RETURN(0);
+cleanup:
+ OBD_FREE(data2, sizeof(*data2));
+
+ /* drop all taken locks */
+ while (--i >= 0) {
+ if (lockh[i].cookie)
+ ldlm_lock_decref(lockh + i, lockmode);
+ lockh[i].cookie = 0;
+ }
+ return rc;
+}
+
+static int
+lmv_enqueue_remote(struct obd_export *exp, int lock_type,
+ struct lookup_intent *it, int lock_mode,
+ struct mdc_op_data *data, struct lustre_handle *lockh,
+ void *lmm, int lmmsize, ldlm_completion_callback cb_compl,
+ ldlm_blocking_callback cb_blocking, void *cb_data)
+{
+ struct ptlrpc_request *req = LUSTRE_IT(it)->it_data;
+ struct obd_device *obd = exp->exp_obd;
+ struct lmv_obd *lmv = &obd->u.lmv;
+ struct lustre_handle plock;
+ struct mdc_op_data rdata;
+ struct mds_body *body = NULL;
+ int rc = 0, pmode;
+ ENTRY;
+
+ body = lustre_msg_buf(req->rq_repmsg, 1, sizeof(*body));
+ LASSERT(body != NULL);
+
+ if (!(body->valid & OBD_MD_MDS))
+ RETURN(0);
+
+ CDEBUG(D_OTHER, "ENQUEUE '%s' on "DLID4" -> "DLID4"\n",
+ LL_IT2STR(it), OLID4(&data->id1), OLID4(&body->id1));
+
+ /* we got LOOKUP lock, but we really need attrs */
+ pmode = LUSTRE_IT(it)->it_lock_mode;
+ LASSERT(pmode != 0);
+ memcpy(&plock, lockh, sizeof(plock));
+ LUSTRE_IT(it)->it_lock_mode = 0;
+ LUSTRE_IT(it)->it_data = NULL;
+ LASSERT((body->valid & OBD_MD_FID) != 0);
+
+ memcpy(&rdata, data, sizeof(rdata));
+ rdata.id1 = body->id1;
+ rdata.name = NULL;
+ rdata.namelen = 0;
+
+ LUSTRE_IT(it)->it_disposition &= ~DISP_ENQ_COMPLETE;
+ ptlrpc_req_finished(req);
+
+ rc = md_enqueue(lmv->tgts[id_group(&rdata.id1)].ltd_exp,
+ lock_type, it, lock_mode, &rdata, lockh, lmm,
+ lmmsize, cb_compl, cb_blocking, cb_data);
+ ldlm_lock_decref(&plock, pmode);
+ RETURN(rc);
+}
+
+static int
+lmv_enqueue(struct obd_export *exp, int lock_type,
+ struct lookup_intent *it, int lock_mode,
+ struct mdc_op_data *data, struct lustre_handle *lockh,
+ void *lmm, int lmmsize, ldlm_completion_callback cb_compl,
+ ldlm_blocking_callback cb_blocking, void *cb_data)
+{
+ struct obd_device *obd = exp->exp_obd;
+ struct lmv_obd *lmv = &obd->u.lmv;
+ struct lmv_obj *obj;
+ int rc, mds;
+ ENTRY;
+
+ rc = lmv_check_connect(obd);
+ if (rc)
+ RETURN(rc);
+
+ if (data->mea1 && it->it_op == IT_UNLINK) {
+ rc = lmv_enqueue_slaves(exp, lock_type, it, lock_mode,
+ data, lockh, lmm, lmmsize,
+ cb_compl, cb_blocking, cb_data);
+ RETURN(rc);
+ }
+
+ if (data->namelen) {
+ obj = lmv_grab_obj(obd, &data->id1);
+ if (obj) {
+ /* directory is splitted. look for right mds for this
+ * name */
+ mds = raw_name2idx(obj->hashtype, obj->objcount,
+ (char *)data->name, data->namelen);
+ data->id1 = obj->objs[mds].id;
+ lmv_put_obj(obj);
+ }
+ }
+ CDEBUG(D_OTHER, "ENQUEUE '%s' on "DLID4"\n", LL_IT2STR(it),
+ OLID4(&data->id1));
+
+ rc = md_enqueue(lmv->tgts[id_group(&data->id1)].ltd_exp,
+ lock_type, it, lock_mode, data, lockh, lmm,
+ lmmsize, cb_compl, cb_blocking, cb_data);
+ if (rc == 0 && it->it_op == IT_OPEN)
+ rc = lmv_enqueue_remote(exp, lock_type, it, lock_mode,
+ data, lockh, lmm, lmmsize,
+ cb_compl, cb_blocking, cb_data);
+ RETURN(rc);
+}
+
+static int
+lmv_getattr_lock(struct obd_export *exp, struct lustre_id *id,
+ char *filename, int namelen, __u64 valid,
+ unsigned int ea_size, struct ptlrpc_request **request)
+{
+ int rc, mds = id_group(id), loop = 0;
+ struct obd_device *obd = exp->exp_obd;
+ struct lmv_obd *lmv = &obd->u.lmv;
+ struct lustre_id rid = *id;
+ struct mds_body *body;
+ struct lmv_obj *obj;
+ ENTRY;
+
+ rc = lmv_check_connect(obd);
+ if (rc)
+ RETURN(rc);
+repeat:
+ LASSERT(++loop <= 2);
+ obj = lmv_grab_obj(obd, id);
+ if (obj) {
+ /* directory is splitted. look for right mds for this name */
+ mds = raw_name2idx(obj->hashtype, obj->objcount,
+ filename, namelen - 1);
+ rid = obj->objs[mds].id;
+ lmv_put_obj(obj);
+ }
+
+ CDEBUG(D_OTHER, "getattr_lock for %*s on "DLID4" -> "DLID4"\n",
+ namelen, filename, OLID4(id), OLID4(&rid));
+
+ rc = md_getattr_lock(lmv->tgts[id_group(&rid)].ltd_exp,
+ &rid, filename, namelen,
+ valid == OBD_MD_FLID ? valid : valid | OBD_MD_FID,
+ ea_size, request);
+ if (rc == 0) {
+ /*
+ * this could be cross-node reference. in this case all we have
+ * right now is lustre_id triple. we'd like to find other
+ * attributes.
+ */
+ body = lustre_msg_buf((*request)->rq_repmsg, 0, sizeof(*body));
+ LASSERT(body != NULL);
+ LASSERT((body->valid & OBD_MD_FID) != 0
+ || body->valid == OBD_MD_FLID);
+
+ if (body->valid & OBD_MD_MDS) {
+ struct ptlrpc_request *req = NULL;
+
+ rid = body->id1;
+ CDEBUG(D_OTHER, "request attrs for "DLID4"\n", OLID4(&rid));
+
+ rc = md_getattr_lock(lmv->tgts[id_group(&rid)].ltd_exp,
+ &rid, NULL, 1, valid, ea_size, &req);
+ ptlrpc_req_finished(*request);
+ *request = req;
+ }
+ } else if (rc == -ERESTART) {
+ /* directory got splitted. time to update local object and
+ * repeat the request with proper MDS */
+ rc = lmv_get_mea_and_update_object(exp, &rid);
+ if (rc == 0) {
+ ptlrpc_req_finished(*request);
+ goto repeat;
+ }
+ }
+ RETURN(rc);
+}
+
+/*
+ * llite passes id of an target inode in data->id1 and id of directory in
+ * data->id2
+ */
+static int lmv_link(struct obd_export *exp, struct mdc_op_data *data,
+ struct ptlrpc_request **request)
+{
+ struct obd_device *obd = exp->exp_obd;
+ struct lmv_obd *lmv = &obd->u.lmv;
+ struct lmv_obj *obj;
+ int rc, mds;
+ ENTRY;
+
+ rc = lmv_check_connect(obd);
+ if (rc)
+ RETURN(rc);
+
+ if (data->namelen != 0) {
+ /* usual link request */
+ obj = lmv_grab_obj(obd, &data->id2);
+ if (obj) {
+ rc = raw_name2idx(obj->hashtype, obj->objcount,
+ data->name, data->namelen);
+ data->id2 = obj->objs[rc].id;
+ lmv_put_obj(obj);
+ }
+
+ mds = id_group(&data->id2);
+
+ CDEBUG(D_OTHER,"link "DLID4":%*s to "DLID4"\n",
+ OLID4(&data->id2), data->namelen, data->name,
+ OLID4(&data->id1));
+ } else {
+ mds = id_group(&data->id1);
+
+ /* request from MDS to acquire i_links for inode by id1 */
+ CDEBUG(D_OTHER, "inc i_nlinks for "DLID4"\n",
+ OLID4(&data->id1));
+ }
+
+ CDEBUG(D_OTHER, "forward to MDS #%u ("DLID4")\n",
+ mds, OLID4(&data->id1));
+ rc = md_link(lmv->tgts[mds].ltd_exp, data, request);
+
+ RETURN(rc);
+}
+
+static int lmv_rename(struct obd_export *exp, struct mdc_op_data *data,
+ const char *old, int oldlen, const char *new, int newlen,
+ struct ptlrpc_request **request)
+{
+ struct obd_device *obd = exp->exp_obd;
+ struct lmv_obd *lmv = &obd->u.lmv;
+ struct lmv_obj *obj;
+ int rc, mds;
+ ENTRY;
+
+ CDEBUG(D_OTHER, "rename %*s in "DLID4" to %*s in "DLID4"\n",
+ oldlen, old, OLID4(&data->id1), newlen, new,
+ OLID4(&data->id2));
+
+ rc = lmv_check_connect(obd);
+ if (rc)
+ RETURN(rc);
+
+ if (oldlen == 0) {
+ /*
+ * MDS with old dir entry is asking another MDS to create name
+ * there.
+ */
+ CDEBUG(D_OTHER,
+ "create %*s(%d/%d) in "DLID4" pointing "
+ "to "DLID4"\n", newlen, new, oldlen, newlen,
+ OLID4(&data->id2), OLID4(&data->id1));
+
+ mds = id_group(&data->id2);
+
+ /*
+ * target directory can be splitted, sowe should forward request
+ * to the right MDS.
+ */
+ obj = lmv_grab_obj(obd, &data->id2);
+ if (obj) {
+ mds = raw_name2idx(obj->hashtype, obj->objcount,
+ (char *)new, newlen);
+ data->id2 = obj->objs[mds].id;
+ CDEBUG(D_OTHER, "forward to MDS #%u ("DLID4")\n", mds,
+ OLID4(&data->id2));
+ lmv_put_obj(obj);
+ }
+ goto request;
+ }
+
+ obj = lmv_grab_obj(obd, &data->id1);
+ if (obj) {
+ /*
+ * directory is already splitted, so we have to forward request
+ * to the right MDS.
+ */
+ mds = raw_name2idx(obj->hashtype, obj->objcount,
+ (char *)old, oldlen);
+ data->id1 = obj->objs[mds].id;
+ CDEBUG(D_OTHER, "forward to MDS #%u ("DLID4")\n", mds,
+ OLID4(&data->id1));
+ lmv_put_obj(obj);
+ }
+
+ obj = lmv_grab_obj(obd, &data->id2);
+ if (obj) {
+ /*
+ * directory is already splitted, so we have to forward request
+ * to the right MDS.
+ */
+ mds = raw_name2idx(obj->hashtype, obj->objcount,
+ (char *)new, newlen);
+
+ data->id2 = obj->objs[mds].id;
+ CDEBUG(D_OTHER, "forward to MDS #%u ("DLID4")\n", mds,
+ OLID4(&data->id2));
+ lmv_put_obj(obj);
+ }
+
+ mds = id_group(&data->id1);
+
+request:
+ if (id_group(&data->id1) != id_group(&data->id2)) {
+ CDEBUG(D_OTHER,"cross-node rename "DLID4"/%*s to "DLID4"/%*s\n",
+ OLID4(&data->id1), oldlen, old, OLID4(&data->id2),
+ newlen, new);
+ }
+
+ rc = md_rename(lmv->tgts[mds].ltd_exp, data, old, oldlen,
+ new, newlen, request);
+ RETURN(rc);
+}
+
+static int lmv_setattr(struct obd_export *exp, struct mdc_op_data *data,
+ struct iattr *iattr, void *ea, int ealen, void *ea2,
+ int ea2len, void *ea3, int ea3len,
+ struct ptlrpc_request **request)
+{
+ struct obd_device *obd = exp->exp_obd;
+ struct lmv_obd *lmv = &obd->u.lmv;
+ struct ptlrpc_request *req;
+ struct mds_body *body;
+ struct lmv_obj *obj;
+ int rc = 0, i;
+ ENTRY;
+
+ rc = lmv_check_connect(obd);
+ if (rc)
+ RETURN(rc);
+
+ obj = lmv_grab_obj(obd, &data->id1);
+
+ CDEBUG(D_OTHER, "SETATTR for "DLID4", valid 0x%x%s\n",
+ OLID4(&data->id1), iattr->ia_valid, obj ? ", splitted" : "");
+
+ if (obj) {
+ for (i = 0; i < obj->objcount; i++) {
+ data->id1 = obj->objs[i].id;
+
+ rc = md_setattr(lmv->tgts[id_group(&data->id1)].ltd_exp,
+ data, iattr, ea, ealen, ea2, ea2len,
+ ea3, ea3len, &req);
+
+ if (id_equal_fid(&obj->id, &obj->objs[i].id)) {
+ /*
+ * this is master object and this request should
+ * be returned back to llite.
+ */
+ *request = req;
+ } else {
+ ptlrpc_req_finished(req);
+ }
+
+ if (rc)
+ break;
+ }
+ lmv_put_obj(obj);
+ } else {
+ LASSERT(id_group(&data->id1) < lmv->desc.ld_tgt_count);
+ rc = md_setattr(lmv->tgts[id_group(&data->id1)].ltd_exp,
+ data, iattr, ea, ealen, ea2, ea2len, ea3,
+ ea3len, request);
+ if (rc == 0) {
+ body = lustre_msg_buf((*request)->rq_repmsg, 0,
+ sizeof(*body));
+ LASSERT(body != NULL);
+ LASSERT((body->valid & OBD_MD_FID) != 0);
+ LASSERT(id_group(&body->id1) == id_group(&data->id1));
+ }
+ }
+ RETURN(rc);
+}
+
+static int lmv_sync(struct obd_export *exp, struct lustre_id *id,
+ struct ptlrpc_request **request)
+{
+ struct obd_device *obd = exp->exp_obd;
+ struct lmv_obd *lmv = &obd->u.lmv;
+ int rc;
+ ENTRY;
+
+ rc = lmv_check_connect(obd);
+ if (rc)
+ RETURN(rc);
+
+ rc = md_sync(lmv->tgts[id_group(id)].ltd_exp,
+ id, request);
+ RETURN(rc);
+}
+
+int lmv_dirobj_blocking_ast(struct ldlm_lock *lock,
+ struct ldlm_lock_desc *desc,
+ void *data, int flag)
+{
+ struct lustre_handle lockh;
+ struct lmv_obj *obj;
+ int rc;
+ ENTRY;
+
+ switch (flag) {
+ case LDLM_CB_BLOCKING:
+ ldlm_lock2handle(lock, &lockh);
+ rc = ldlm_cli_cancel(&lockh);
+ if (rc < 0) {
+ CDEBUG(D_INODE, "ldlm_cli_cancel: %d\n", rc);
+ RETURN(rc);
+ }
+ break;
+ case LDLM_CB_CANCELING:
+ /* time to drop cached attrs for dirobj */
+ obj = lock->l_ast_data;
+ if (obj) {
+ CDEBUG(D_OTHER, "cancel %s on "LPU64"/"LPU64
+ ", master "DLID4"\n",
+ lock->l_resource->lr_name.name[3] == 1 ?
+ "LOOKUP" : "UPDATE",
+ lock->l_resource->lr_name.name[0],
+ lock->l_resource->lr_name.name[1],
+ OLID4(&obj->id));
+ lmv_put_obj(obj);
+ }
+ break;
+ default:
+ LBUG();
+ }
+ RETURN(0);
+}
+
+static void lmv_remove_dots(struct page *page)
+{
+ unsigned limit = PAGE_CACHE_SIZE;
+ char *kaddr = page_address(page);
+ struct ext2_dir_entry_2 *p;
+ unsigned offs, rec_len;
+
+ for (offs = 0; offs <= limit - EXT2_DIR_REC_LEN(1); offs += rec_len) {
+ p = (struct ext2_dir_entry_2 *)(kaddr + offs);
+ rec_len = le16_to_cpu(p->rec_len);
+
+ if ((p->name_len == 1 && p->name[0] == '.') ||
+ (p->name_len == 2 && p->name[0] == '.' && p->name[1] == '.'))
+ p->inode = 0;
+ }
+}
+
+static int lmv_readpage(struct obd_export *exp, struct lustre_id *id,
+ __u64 offset, struct page *page,
+ struct ptlrpc_request **request)
+{
+ struct obd_device *obd = exp->exp_obd;
+ struct lmv_obd *lmv = &obd->u.lmv;
+ struct lustre_id rid = *id;
+ struct lmv_obj *obj;
+ int rc, i;
+ ENTRY;
+
+ rc = lmv_check_connect(obd);
+ if (rc)
+ RETURN(rc);
+
+ LASSERT(id_group(id) < lmv->desc.ld_tgt_count);
+ CDEBUG(D_OTHER, "READPAGE at %llu from "DLID4"\n",
+ offset, OLID4(&rid));
+
+ obj = lmv_grab_obj(obd, id);
+ if (obj) {
+ lmv_lock_obj(obj);
+
+ /* find dirobj containing page with requested offset. */
+ for (i = 0; i < obj->objcount; i++) {
+ if (offset < obj->objs[i].size)
+ break;
+ offset -= obj->objs[i].size;
+ }
+ rid = obj->objs[i].id;
+
+ lmv_unlock_obj(obj);
+ lmv_put_obj(obj);
+
+ CDEBUG(D_OTHER, "forward to "DLID4" with offset %lu\n",
+ OLID4(&rid), (unsigned long)offset);
+ }
+ rc = md_readpage(lmv->tgts[id_group(&rid)].ltd_exp, &rid,
+ offset, page, request);
+
+ if (rc == 0 && !id_equal_fid(&rid, id))
+ /* this page isn't from master object. To avoid "." and ".."
+ * duplication in directory, we have to remove them from all
+ * slave objects */
+ lmv_remove_dots(page);
+
+ RETURN(rc);
+}
+
+static int lmv_unlink_slaves(struct obd_export *exp, struct mdc_op_data *data,
+ struct ptlrpc_request **req)
+{
+ struct obd_device *obd = exp->exp_obd;
+ struct lmv_obd *lmv = &obd->u.lmv;
+ struct mea *mea = data->mea1;
+ struct mdc_op_data *data2;
+ int i, rc = 0;
+ ENTRY;
+
+ OBD_ALLOC(data2, sizeof(*data2));
+ if (data2 == NULL)
+ RETURN(-ENOMEM);
+
+ LASSERT(mea != NULL);
+ for (i = 0; i < mea->mea_count; i++) {
+ memset(data2, 0, sizeof(*data2));
+ data2->id1 = mea->mea_ids[i];
+ data2->create_mode = MDS_MODE_DONT_LOCK | S_IFDIR;
+
+ if (lmv->tgts[id_group(&data2->id1)].ltd_exp == NULL)
+ continue;
+
+ rc = md_unlink(lmv->tgts[id_group(&data2->id1)].ltd_exp,
+ data2, req);
+
+ CDEBUG(D_OTHER, "unlink slave "DLID4" -> %d\n",
+ OLID4(&mea->mea_ids[i]), rc);
+
+ if (*req) {
+ ptlrpc_req_finished(*req);
+ *req = NULL;
+ }
+ if (rc)
+ RETURN(rc);
+ }
+ OBD_FREE(data2, sizeof(*data2));
+ RETURN(rc);
+}
+
+static int lmv_delete_inode(struct obd_export *exp, struct lustre_id *id)
+{
+ ENTRY;
+
+ LASSERT(exp && id);
+ if (lmv_delete_obj(exp, id)) {
+ CDEBUG(D_OTHER, "lmv object "DLID4" is destroyed.\n",
+ OLID4(id));
+ }
+ RETURN(0);
+}
+
+static int lmv_unlink(struct obd_export *exp, struct mdc_op_data *data,
+ struct ptlrpc_request **request)
+{
+ struct obd_device *obd = exp->exp_obd;
+ struct lmv_obd *lmv = &obd->u.lmv;
+ int rc, i = 0;
+ ENTRY;
+
+ rc = lmv_check_connect(obd);
+ if (rc)
+ RETURN(rc);
+
+ if (data->namelen == 0 && data->mea1 != NULL) {
+ /* mds asks to remove slave objects */
+ rc = lmv_unlink_slaves(exp, data, request);
+ RETURN(rc);
+ }
+
+ if (data->namelen != 0) {
+ struct lmv_obj *obj;
+
+ obj = lmv_grab_obj(obd, &data->id1);
+ if (obj) {
+ i = raw_name2idx(obj->hashtype, obj->objcount,
+ data->name, data->namelen);
+ data->id1 = obj->objs[i].id;
+ lmv_put_obj(obj);
+ }
+ CDEBUG(D_OTHER, "unlink '%*s' in "DLID4" -> %u\n",
+ data->namelen, data->name, OLID4(&data->id1),
+ i);
+ } else {
+ CDEBUG(D_OTHER, "drop i_nlink on "DLID4"\n",
+ OLID4(&data->id1));
+ }
+ rc = md_unlink(lmv->tgts[id_group(&data->id1)].ltd_exp,
+ data, request);
+ RETURN(rc);
+}
+
+static struct obd_device *lmv_get_real_obd(struct obd_export *exp,
+ struct lustre_id *id)
+{
+ struct obd_device *obd = exp->exp_obd;
+ struct lmv_obd *lmv = &obd->u.lmv;
+ int rc;
+ ENTRY;
+
+ rc = lmv_check_connect(obd);
+ if (rc)
+ RETURN(ERR_PTR(rc));
+ obd = lmv->tgts[id_group(id)].ltd_exp->exp_obd;
+ EXIT;
+
+ return obd;
+}
+
+static int lmv_obd_create_single(struct obd_export *exp, struct obdo *oa,
+ void *acl, int acl_size,
+ struct lov_stripe_md **ea,
+ struct obd_trans_info *oti)
+{
+ struct obd_device *obd = exp->exp_obd;
+ struct lmv_obd *lmv = &obd->u.lmv;
+ struct lov_stripe_md obj_md;
+ struct lov_stripe_md *obj_mdp = &obj_md;
+ int rc = 0;
+ ENTRY;
+
+ LASSERT(ea == NULL);
+ LASSERT(oa->o_mds < lmv->desc.ld_tgt_count);
+
+ rc = obd_create(lmv->tgts[oa->o_mds].ltd_exp, oa,
+ acl, acl_size, &obj_mdp, oti);
+
+ RETURN(rc);
+}
+
+/*
+ * to be called from MDS only. @oa should have correct store cookie and o_fid
+ * values for "master" object, as it will be used.
+ */
+int lmv_obd_create(struct obd_export *exp, struct obdo *oa,
+ void *acl, int acl_size,
+ struct lov_stripe_md **ea, struct obd_trans_info *oti)
+{
+ struct obd_device *obd = exp->exp_obd;
+ struct lmv_obd *lmv = &obd->u.lmv;
+ struct lustre_id mid;
+ int i, c, rc = 0;
+ struct mea *mea;
+ ENTRY;
+
+ rc = lmv_check_connect(obd);
+ if (rc)
+ RETURN(rc);
+
+ LASSERT(oa != NULL);
+
+ if (ea == NULL) {
+ rc = lmv_obd_create_single(exp, oa, acl, acl_size, NULL, oti);
+ if (rc)
+ CERROR("Can't create object, rc = %d\n", rc);
+ RETURN(rc);
+ }
+
+ /* acl is only suppied when mds create single remote obj */
+ LASSERT(acl == NULL && acl_size == 0);
+
+ if (*ea == NULL) {
+ rc = obd_alloc_diskmd(exp, (struct lov_mds_md **)ea);
+ if (rc < 0) {
+ CERROR("obd_alloc_diskmd() failed, error %d\n",
+ rc);
+ RETURN(rc);
+ } else
+ rc = 0;
+
+ if (*ea == NULL)
+ RETURN(-ENOMEM);
+ }
+
+ /*
+ * here we should take care about splitted dir, so store cookie and fid
+ * for "master" object should already be allocated and passed in @oa.
+ */
+ LASSERT(oa->o_id != 0);
+ LASSERT(oa->o_fid != 0);
+
+ /* save "master" object id */
+ obdo2id(&mid, oa);
+
+ mea = (struct mea *)*ea;
+ mea->mea_master = -1;
+ mea->mea_magic = MEA_MAGIC_ALL_CHARS;
+
+ if (!mea->mea_count || mea->mea_count > lmv->desc.ld_tgt_count)
+ mea->mea_count = lmv->desc.ld_tgt_count;
+
+ for (i = 0, c = 0; c < mea->mea_count && i < lmv->desc.ld_tgt_count; i++) {
+ struct lov_stripe_md obj_md;
+ struct lov_stripe_md *obj_mdp = &obj_md;
+
+ if (lmv->tgts[i].ltd_exp == NULL) {
+ /* this is "master" MDS */
+ mea->mea_master = i;
+ mea->mea_ids[c] = mid;
+ c++;
+ continue;
+ }
+
+ /*
+ * "master" MDS should always be part of stripped dir,
+ * so scan for it.
+ */
+ if (mea->mea_master == -1 && c == mea->mea_count - 1)
+ continue;
+
+ oa->o_valid = OBD_MD_FLGENER | OBD_MD_FLTYPE | OBD_MD_FLMODE |
+ OBD_MD_FLUID | OBD_MD_FLGID | OBD_MD_FLID;
+
+ rc = obd_create(lmv->tgts[c].ltd_exp, oa, NULL, 0,
+ &obj_mdp, oti);
+ if (rc) {
+ CERROR("obd_create() failed on MDT target %d, "
+ "error %d\n", c, rc);
+ RETURN(rc);
+ }
+
+ CDEBUG(D_OTHER, "dirobj at mds %d: "LPU64"/%u\n",
+ i, oa->o_id, oa->o_generation);
+
+
+ /*
+ * here, when object is created (or it is master and was passed
+ * from caller) on desired MDS we save its fid to local mea_ids.
+ */
+ LASSERT(oa->o_fid);
+
+ /*
+ * store cookie should be defined here for both cases (master
+ * object and not master), because master is already created.
+ */
+ LASSERT(oa->o_id);
+
+ /* fill mea by store cookie and fid */
+ obdo2id(&mea->mea_ids[c], oa);
+ c++;
+ }
+ LASSERT(c == mea->mea_count);
+
+ CDEBUG(D_OTHER, "%d dirobjects created\n",
+ (int)mea->mea_count);
+
+ RETURN(rc);
+}
+
+static int lmv_llog_init(struct obd_device *obd, struct obd_llogs *llogs,
+ struct obd_device *tgt, int count,
+ struct llog_catid *logid)
+{
+ struct llog_ctxt *ctxt;
+ int rc;
+ ENTRY;
+
+ rc = obd_llog_setup(obd, llogs, LLOG_CONFIG_REPL_CTXT, tgt, 0, NULL,
+ &llog_client_ops);
+ if (rc == 0) {
+ ctxt = llog_get_context(llogs, LLOG_CONFIG_REPL_CTXT);
+ ctxt->loc_imp = tgt->u.cli.cl_import;
+ }
+
+ RETURN(rc);
+}
+
+static int lmv_llog_finish(struct obd_device *obd,
+ struct obd_llogs *llogs, int count)
+{
+ int rc;
+ ENTRY;
+
+ rc = obd_llog_cleanup(llog_get_context(llogs, LLOG_CONFIG_REPL_CTXT));
+ RETURN(rc);
+}
+
+static int lmv_precleanup(struct obd_device *obd, int flags)
+{
+ int rc = 0;
+
+ rc = obd_llog_finish(obd, &obd->obd_llogs, 0);
+ if (rc != 0)
+ CERROR("failed to cleanup llogging subsystems\n");
+
+ RETURN(rc);
+}
+
+static int lmv_get_info(struct obd_export *exp, __u32 keylen,
+ void *key, __u32 *vallen, void *val)
+{
+ struct obd_device *obd;
+ struct lmv_obd *lmv;
+ int rc = 0;
+ ENTRY;
+
+ obd = class_exp2obd(exp);
+ if (obd == NULL) {
+ CDEBUG(D_IOCTL, "invalid client cookie "LPX64"\n",
+ exp->exp_handle.h_cookie);
+ RETURN(-EINVAL);
+ }
+
+ lmv = &obd->u.lmv;
+ if (keylen == strlen("mdsize") && !strcmp(key, "mdsize")) {
+ __u32 *mdsize = val;
+ *vallen = sizeof(__u32);
+ *mdsize = sizeof(struct lustre_id) * lmv->desc.ld_tgt_count
+ + sizeof(struct mea);
+ RETURN(0);
+ } else if (keylen == strlen("mdsnum") && !strcmp(key, "mdsnum")) {
+ struct obd_uuid *cluuid = &lmv->cluuid;
+ struct lmv_tgt_desc *tgts;
+ __u32 *mdsnum = val;
+ int i;
+
+ tgts = lmv->tgts;
+ for (i = 0; i < lmv->desc.ld_tgt_count; i++, tgts++) {
+ if (obd_uuid_equals(&tgts->uuid, cluuid)) {
+ *vallen = sizeof(__u32);
+ *mdsnum = i;
+ RETURN(0);
+ }
+ }
+ LASSERT(0);
+ } else if (keylen == strlen("rootid") && !strcmp(key, "rootid")) {
+ rc = lmv_check_connect(obd);
+ if (rc)
+ RETURN(rc);
+
+ /* getting rootid from first MDS. */
+ rc = obd_get_info(lmv->tgts[0].ltd_exp, keylen, key,
+ vallen, val);
+ RETURN(rc);
+ } else if (keylen >= strlen("lmvdesc") && !strcmp(key, "lmvdesc")) {
+ struct lmv_desc *desc_ret = val;
+ *desc_ret = lmv->desc;
+ RETURN(0);
+ } else if (keylen >= strlen("remote_flag") && !strcmp(key, "remote_flag")) {
+ struct lmv_tgt_desc *tgts;
+ int i;
+
+ rc = lmv_check_connect(obd);
+ if (rc)
+ RETURN(rc);
+
+ LASSERT(*vallen == sizeof(__u32));
+ for (i = 0, tgts = lmv->tgts; i < lmv->desc.ld_tgt_count;
+ i++, tgts++) {
+
+ /* all tgts should be connected when this get called. */
+ if (!tgts || !tgts->ltd_exp) {
+ CERROR("target not setup?\n");
+ continue;
+ }
+
+ if (!obd_get_info(tgts->ltd_exp, keylen, key,
+ vallen, val))
+ RETURN(0);
+ }
+ RETURN(-EINVAL);
+ } else if (keylen >= strlen("lovdesc") && !strcmp(key, "lovdesc")) {
+ rc = lmv_check_connect(obd);
+ if (rc)
+ RETURN(rc);
+
+ /* forwarding this request to first MDS, it should know LOV
+ * desc. */
+ rc = obd_get_info(lmv->tgts[0].ltd_exp, keylen, key,
+ vallen, val);
+ RETURN(rc);
+ } else if (keylen >= strlen("getext") && !strcmp(key, "getext")) {
+ struct lmv_tgt_desc *tgts;
+ int i;
+
+ rc = lmv_check_connect(obd);
+ if (rc)
+ RETURN(rc);
+
+ LASSERT(*vallen == sizeof(struct fid_extent));
+ for (i = 0, tgts = lmv->tgts; i < lmv->desc.ld_tgt_count;
+ i++, tgts++) {
+
+ /* all tgts should be connected when this get called. */
+ if (!tgts || !tgts->ltd_exp) {
+ CERROR("target not setup?\n");
+ continue;
+ }
+
+ rc = obd_get_info(tgts->ltd_exp, keylen, key,
+ vallen, val);
+ if (rc)
+ RETURN(rc);
+ }
+ RETURN(0);
+ }
+
+ CDEBUG(D_IOCTL, "invalid key\n");
+ RETURN(-EINVAL);
+}
+
+int lmv_set_info(struct obd_export *exp, obd_count keylen,
+ void *key, obd_count vallen, void *val)
+{
+ struct lmv_tgt_desc *tgt;
+ struct obd_device *obd;
+ struct lmv_obd *lmv;
+ int rc = 0;
+ ENTRY;
+
+ obd = class_exp2obd(exp);
+ if (obd == NULL) {
+ CDEBUG(D_IOCTL, "invalid client cookie "LPX64"\n",
+ exp->exp_handle.h_cookie);
+ RETURN(-EINVAL);
+ }
+ lmv = &obd->u.lmv;
+
+ if (keylen >= strlen("inter_mds") && strcmp(key, "inter_mds") == 0) {
+ lmv->server_timeout = 1;
+ lmv_set_timeouts(obd);
+ RETURN(0);
+ }
+
+ /* maybe this could be default */
+ if ((keylen == strlen("sec") && strcmp(key, "sec") == 0) ||
+ (keylen == strlen("sec_flags") && strcmp(key, "sec_flags") == 0) ||
+ (keylen == strlen("nllu") && strcmp(key, "nllu") == 0)) {
+ struct obd_export *exp;
+ int err, i;
+
+ spin_lock(&lmv->lmv_lock);
+ for (i = 0, tgt = lmv->tgts; i < lmv->desc.ld_tgt_count;
+ i++, tgt++) {
+ exp = tgt->ltd_exp;
+ /* during setup time the connections to mdc might
+ * haven't been established.
+ */
+ if (exp == NULL) {
+ struct obd_device *tgt_obd;
+
+ tgt_obd = class_find_client_obd(&tgt->uuid,
+ OBD_MDC_DEVICENAME,
+ &obd->obd_uuid);
+ if (!tgt_obd) {
+ CERROR("can't set info %s, "
+ "device %s not attached?\n",
+ (char *) key, tgt->uuid.uuid);
+ rc = -EINVAL;
+ continue;
+ }
+ exp = tgt_obd->obd_self_export;
+ }
+
+ err = obd_set_info(exp, keylen, key, vallen, val);
+ if (!rc)
+ rc = err;
+ }
+ spin_unlock(&lmv->lmv_lock);
+
+ RETURN(rc);
+ }
+ if (((keylen == strlen("flush_cred") &&
+ strcmp(key, "flush_cred") == 0)) ||
+ ((keylen == strlen("crypto_type") &&
+ strcmp(key, "crypto_type") == 0))) {
+ int i;
+
+ for (i = 0, tgt = lmv->tgts; i < lmv->desc.ld_tgt_count;
+ i++, tgt++) {
+ if (!tgt->ltd_exp)
+ continue;
+ rc = obd_set_info(tgt->ltd_exp,
+ keylen, key, vallen, val);
+ if (rc)
+ RETURN(rc);
+ }
+
+ RETURN(0);
+ }
+
+ if (keylen == strlen("ids") && memcmp(key, "ids", keylen) == 0) {
+ struct lustre_id *id = (struct lustre_id *)val;
+
+ rc = lmv_check_connect(obd);
+ if (rc)
+ RETURN(rc);
+
+ rc = obd_set_info(lmv->tgts[id_group(id)].ltd_exp,
+ keylen, key, vallen, val);
+ RETURN(rc);
+ }
+
+ if (keylen == strlen("chkconnect") &&
+ memcmp(key, "chkconnect", keylen) == 0) {
+ rc = lmv_check_connect(obd);
+ RETURN(rc);
+ }
+
+ RETURN(-EINVAL);
+}
+
+int lmv_packmd(struct obd_export *exp, struct lov_mds_md **lmmp,
+ struct lov_stripe_md *lsm)
+{
+ struct obd_device *obd = class_exp2obd(exp);
+ struct lmv_obd *lmv = &obd->u.lmv;
+ struct mea *meap, *lsmp;
+ int mea_size, i;
+ ENTRY;
+
+ mea_size = (sizeof(struct lustre_id) *
+ lmv->desc.ld_tgt_count) + sizeof(struct mea);
+ if (!lmmp)
+ RETURN(mea_size);
+
+ if (*lmmp && !lsm) {
+ OBD_FREE(*lmmp, mea_size);
+ *lmmp = NULL;
+ RETURN(0);
+ }
+
+ if (*lmmp == NULL) {
+ OBD_ALLOC(*lmmp, mea_size);
+ if (*lmmp == NULL)
+ RETURN(-ENOMEM);
+ }
+
+ if (!lsm)
+ RETURN(mea_size);
+
+ lsmp = (struct mea *)lsm;
+ meap = (struct mea *)*lmmp;
+
+ if (lsmp->mea_magic != MEA_MAGIC_LAST_CHAR &&
+ lsmp->mea_magic != MEA_MAGIC_ALL_CHARS)
+ RETURN(-EINVAL);
+
+ meap->mea_magic = cpu_to_le32(lsmp->mea_magic);
+ meap->mea_count = cpu_to_le32(lsmp->mea_count);
+ meap->mea_master = cpu_to_le32(lsmp->mea_master);
+
+ for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
+ meap->mea_ids[i] = meap->mea_ids[i];
+ id_cpu_to_le(&meap->mea_ids[i]);
+ }
+
+ RETURN(mea_size);
+}
+
+int lmv_unpackmd(struct obd_export *exp, struct lov_stripe_md **lsmp,
+ struct lov_mds_md *lmm, int lmm_size)
+{
+ struct obd_device *obd = class_exp2obd(exp);
+ struct mea **tmea = (struct mea **)lsmp;
+ struct mea *mea = (struct mea *)lmm;
+ struct lmv_obd *lmv = &obd->u.lmv;
+ int mea_size, i, rc = 0;
+ __u32 magic;
+ ENTRY;
+
+ mea_size = sizeof(struct lustre_id) *
+ lmv->desc.ld_tgt_count + sizeof(struct mea);
+
+ if (lsmp == NULL)
+ return mea_size;
+
+ if (*lsmp != NULL && lmm == NULL) {
+ OBD_FREE(*tmea, mea_size);
+ RETURN(0);
+ }
+
+ LASSERT(mea_size == lmm_size);
+
+ OBD_ALLOC(*tmea, mea_size);
+ if (*tmea == NULL)
+ RETURN(-ENOMEM);
+
+ if (!lmm)
+ RETURN(mea_size);
+
+ if (mea->mea_magic == MEA_MAGIC_LAST_CHAR ||
+ mea->mea_magic == MEA_MAGIC_ALL_CHARS)
+ {
+ magic = le32_to_cpu(mea->mea_magic);
+ } else {
+ struct mea_old *old = (struct mea_old *)lmm;
+
+ mea_size = sizeof(struct lustre_id) * old->mea_count +
+ sizeof(struct mea_old);
+
+ if (old->mea_count > 256 || old->mea_master > 256 ||
+ lmm_size < mea_size || old->mea_master > old->mea_count) {
+ CWARN("bad MEA: count %u, master %u, size %u\n",
+ old->mea_count, old->mea_master, mea_size);
+ GOTO(out_free_mea, rc = -EINVAL);
+ }
+ magic = MEA_MAGIC_LAST_CHAR;
+ }
+
+ (*tmea)->mea_magic = magic;
+ (*tmea)->mea_count = le32_to_cpu(mea->mea_count);
+ (*tmea)->mea_master = le32_to_cpu(mea->mea_master);
+
+ for (i = 0; i < (*tmea)->mea_count; i++) {
+ (*tmea)->mea_ids[i] = mea->mea_ids[i];
+ id_le_to_cpu(&(*tmea)->mea_ids[i]);
+ }
+ RETURN(mea_size);
+
+out_free_mea:
+ OBD_FREE(*tmea, mea_size);
+ return rc;
+}
+
+int lmv_brw(int rw, struct obd_export *exp, struct obdo *oa,
+ struct lov_stripe_md *ea, obd_count oa_bufs,
+ struct brw_page *pgarr, struct obd_trans_info *oti)
+{
+ struct obd_device *obd = exp->exp_obd;
+ struct lmv_obd *lmv = &obd->u.lmv;
+ struct mea *mea = (struct mea *) ea;
+ int err;
+
+ LASSERT(oa != NULL);
+ LASSERT(ea != NULL);
+ LASSERT(pgarr != NULL);
+ LASSERT(oa->o_mds < lmv->desc.ld_tgt_count);
+
+ oa->o_gr = id_gen(&mea->mea_ids[oa->o_mds]);
+ oa->o_id = id_ino(&mea->mea_ids[oa->o_mds]);
+ oa->o_valid = OBD_MD_FLID | OBD_MD_FLGROUP;
+
+ err = obd_brw(rw, lmv->tgts[oa->o_mds].ltd_exp,
+ oa, NULL, oa_bufs, pgarr, oti);
+ RETURN(err);
+}
+
+static int lmv_cancel_unused(struct obd_export *exp,
+ struct lov_stripe_md *lsm,
+ int flags, void *opaque)
+{
+ struct obd_device *obd = exp->exp_obd;
+ struct lmv_obd *lmv = &obd->u.lmv;
+ int rc = 0, err, i;
+ ENTRY;
+
+ LASSERT(lsm == NULL);
+
+ for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
+ if (!lmv->tgts[i].ltd_exp || !lmv->tgts[i].active)
+ continue;
+
+ err = obd_cancel_unused(lmv->tgts[i].ltd_exp,
+ NULL, flags, opaque);
+ if (!rc)
+ rc = err;
+ }
+ RETURN(rc);
+}
+
+struct obd_ops lmv_obd_ops = {
+ .o_owner = THIS_MODULE,
+ .o_attach = lmv_attach,
+ .o_detach = lmv_detach,
+ .o_setup = lmv_setup,
+ .o_cleanup = lmv_cleanup,
+ .o_precleanup = lmv_precleanup,
+ .o_process_config = lmv_process_config,
+ .o_connect = lmv_connect,
+ .o_disconnect = lmv_disconnect,
+ .o_statfs = lmv_statfs,
+ .o_llog_init = lmv_llog_init,
+ .o_llog_finish = lmv_llog_finish,
+ .o_get_info = lmv_get_info,
+ .o_set_info = lmv_set_info,
+ .o_create = lmv_obd_create,
+ .o_packmd = lmv_packmd,
+ .o_unpackmd = lmv_unpackmd,
+ .o_brw = lmv_brw,
+ .o_init_ea_size = lmv_init_ea_size,
+ .o_notify = lmv_notify,
+ .o_iocontrol = lmv_iocontrol,
+ .o_cancel_unused = lmv_cancel_unused,
+};
+
+struct md_ops lmv_md_ops = {
+ .m_getstatus = lmv_getstatus,
+ .m_getattr = lmv_getattr,
+ .m_change_cbdata = lmv_change_cbdata,
+ .m_change_cbdata_name = lmv_change_cbdata_name,
+ .m_close = lmv_close,
+ .m_create = lmv_create,
+ .m_done_writing = lmv_done_writing,
+ .m_enqueue = lmv_enqueue,
+ .m_getattr_lock = lmv_getattr_lock,
+ .m_intent_lock = lmv_intent_lock,
+ .m_link = lmv_link,
+ .m_rename = lmv_rename,
+ .m_setattr = lmv_setattr,
+ .m_sync = lmv_sync,
+ .m_readpage = lmv_readpage,
+ .m_unlink = lmv_unlink,
+ .m_get_real_obd = lmv_get_real_obd,
+ .m_valid_attrs = lmv_valid_attrs,
+ .m_delete_inode = lmv_delete_inode,
+ .m_access_check = lmv_access_check,
+};
+
+int __init lmv_init(void)
+{
+ struct lprocfs_static_vars lvars;
+ int rc;
+
+ obj_cache = kmem_cache_create("lmv_objects",
+ sizeof(struct lmv_obj),
+ 0, 0, NULL, NULL);
+ if (!obj_cache) {
+ CERROR("error allocating lmv objects cache\n");
+ return -ENOMEM;
+ }
+
+ lprocfs_init_vars(lmv, &lvars);
+ rc = class_register_type(&lmv_obd_ops, &lmv_md_ops,
+ lvars.module_vars,
+ OBD_LMV_DEVICENAME);
+ if (rc)
+ kmem_cache_destroy(obj_cache);
+
+ return rc;
+}
+
+#ifdef __KERNEL__
+static void lmv_exit(void)
+{
+ class_unregister_type(OBD_LMV_DEVICENAME);
+
+ LASSERTF(kmem_cache_destroy(obj_cache) == 0,
+ "can't free lmv objects cache, %d object(s)"
+ "still in use\n", atomic_read(&obj_cache_count));
+}
+
+MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
+MODULE_DESCRIPTION("Lustre Logical Metadata Volume OBD driver");
+MODULE_LICENSE("GPL");
+
+module_init(lmv_init);
+module_exit(lmv_exit);
+#endif
git://git.whamcloud.com / fs / lustre-release.git / commitdiff