drivers/staging/lustre/lustre/lov/lov_log.c - kernel/lockdown - Git at Google

 /*
  * GPL HEADER START
  *
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 only,
  * as published by the Free Software Foundation.
  *
  * This 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).
  *
  * 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
  *
  * 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) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
  * Use is subject to license terms.
  *
  * Copyright (c) 2012, Intel Corporation.
  */
 /*
  * This file is part of Lustre, http://www.lustre.org/
  * Lustre is a trademark of Sun Microsystems, Inc.
  *
  * lustre/lov/lov_log.c
  *
  * Author: Phil Schwan <phil@clusterfs.com>
  * Author: Peter Braam <braam@clusterfs.com>
  * Author: Mike Shaver <shaver@clusterfs.com>
  */

 #define DEBUG_SUBSYSTEM S_LOV
 #include <linux/libcfs/libcfs.h>

 #include <obd_support.h>
 #include <lustre_lib.h>
 #include <lustre_net.h>
 #include <lustre/lustre_idl.h>
 #include <lustre_dlm.h>
 #include <lustre_mds.h>
 #include <obd_class.h>
 #include <obd_lov.h>
 #include <obd_ost.h>
 #include <lprocfs_status.h>
 #include <lustre_log.h>

 #include "lov_internal.h"

 /* Add log records for each OSC that this object is striped over, and return
  * cookies for each one.  We _would_ have nice abstraction here, except that
  * we need to keep cookies in stripe order, even if some are NULL, so that
  * the right cookies are passed back to the right OSTs at the client side.
  * Unset cookies should be all-zero (which will never occur naturally). */
 static int lov_llog_origin_add(const struct lu_env *env,
 			       struct llog_ctxt *ctxt,
 			       struct llog_rec_hdr *rec,
 			       struct lov_stripe_md *lsm,
 			       struct llog_cookie *logcookies, int numcookies)
 {
 	struct obd_device *obd = ctxt->loc_obd;
 	struct lov_obd *lov = &obd->u.lov;
 	int i, rc = 0, cookies = 0;

 	LASSERTF(logcookies && numcookies >= lsm->lsm_stripe_count,
 		 "logcookies %p, numcookies %d lsm->lsm_stripe_count %d \n",
 		 logcookies, numcookies, lsm->lsm_stripe_count);

 	for (i = 0; i < lsm->lsm_stripe_count; i++) {
 		struct lov_oinfo *loi = lsm->lsm_oinfo[i];
 		struct obd_device *child =
 			lov->lov_tgts[loi->loi_ost_idx]->ltd_exp->exp_obd;
 		struct llog_ctxt *cctxt = llog_get_context(child, ctxt->loc_idx);

 		/* fill mds unlink/setattr log record */
 		switch (rec->lrh_type) {
 		case MDS_UNLINK_REC: {
 			struct llog_unlink_rec *lur = (struct llog_unlink_rec *)rec;
 			lur->lur_oid = ostid_id(&loi->loi_oi);
 			lur->lur_oseq = (__u32)ostid_seq(&loi->loi_oi);
 			break;
 		}
 		case MDS_SETATTR64_REC: {
 			struct llog_setattr64_rec *lsr = (struct llog_setattr64_rec *)rec;
 			lsr->lsr_oi = loi->loi_oi;
 			break;
 		}
 		default:
 			break;
 		}

 		/* inject error in llog_obd_add() below */
 		if (OBD_FAIL_CHECK(OBD_FAIL_MDS_FAIL_LOV_LOG_ADD)) {
 			llog_ctxt_put(cctxt);
 			cctxt = NULL;
 		}
 		rc = llog_obd_add(env, cctxt, rec, NULL, logcookies + cookies,
 				  numcookies - cookies);
 		llog_ctxt_put(cctxt);
 		if (rc < 0) {
 			CERROR("Can't add llog (rc = %d) for stripe %d\n",
 			       rc, cookies);
 			memset(logcookies + cookies, 0,
 			       sizeof(struct llog_cookie));
 			rc = 1; /* skip this cookie */
 		}
 		/* Note that rc is always 1 if llog_obd_add was successful */
 		cookies += rc;
 	}
 	return cookies;
 }

 static int lov_llog_origin_connect(struct llog_ctxt *ctxt,
 				   struct llog_logid *logid,
 				   struct llog_gen *gen,
 				   struct obd_uuid *uuid)
 {
 	struct obd_device *obd = ctxt->loc_obd;
 	struct lov_obd *lov = &obd->u.lov;
 	int i, rc = 0, err = 0;

 	obd_getref(obd);
 	for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 		struct obd_device *child;
 		struct llog_ctxt *cctxt;

 		if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_active)
 			continue;
 		if (uuid && !obd_uuid_equals(uuid, &lov->lov_tgts[i]->ltd_uuid))
 			continue;
 		CDEBUG(D_CONFIG, "connect %d/%d\n", i, lov->desc.ld_tgt_count);
 		child = lov->lov_tgts[i]->ltd_exp->exp_obd;
 		cctxt = llog_get_context(child, ctxt->loc_idx);
 		rc = llog_connect(cctxt, logid, gen, uuid);
 		llog_ctxt_put(cctxt);

 		if (rc) {
 			CERROR("error osc_llog_connect tgt %d (%d)\n", i, rc);
 			if (!err)
 				err = rc;
 		}
 	}
 	obd_putref(obd);

 	return err;
 }

 /* the replicators commit callback */
 static int lov_llog_repl_cancel(const struct lu_env *env,
 				struct llog_ctxt *ctxt,
 				struct lov_stripe_md *lsm,
 				int count, struct llog_cookie *cookies,
 				int flags)
 {
 	struct lov_obd *lov;
 	struct obd_device *obd = ctxt->loc_obd;
 	int rc = 0, i;

 	LASSERT(lsm != NULL);
 	LASSERT(count == lsm->lsm_stripe_count);

 	lov = &obd->u.lov;
 	obd_getref(obd);
 	for (i = 0; i < count; i++, cookies++) {
 		struct lov_oinfo *loi = lsm->lsm_oinfo[i];
 		struct obd_device *child =
 			lov->lov_tgts[loi->loi_ost_idx]->ltd_exp->exp_obd;
 		struct llog_ctxt *cctxt =
 			llog_get_context(child, ctxt->loc_idx);
 		int err;

 		err = llog_cancel(env, cctxt, NULL, 1, cookies, flags);
 		llog_ctxt_put(cctxt);
 		if (err && lov->lov_tgts[loi->loi_ost_idx]->ltd_active) {
 			CERROR("%s: objid "DOSTID" subobj "DOSTID
 			       " on OST idx %d: rc = %d\n",
 			       obd->obd_name, POSTID(&lsm->lsm_oi),
 			       POSTID(&loi->loi_oi), loi->loi_ost_idx, err);
 			if (!rc)
 				rc = err;
 		}
 	}
 	obd_putref(obd);
 	return rc;
 }

 static struct llog_operations lov_mds_ost_orig_logops = {
 	.lop_obd_add	= lov_llog_origin_add,
 	.lop_connect	= lov_llog_origin_connect,
 };

 static struct llog_operations lov_size_repl_logops = {
 	.lop_cancel	= lov_llog_repl_cancel,
 };

 int lov_llog_init(struct obd_device *obd, struct obd_llog_group *olg,
 		  struct obd_device *disk_obd, int *index)
 {
 	struct lov_obd *lov = &obd->u.lov;
 	struct obd_device *child;
 	int i, rc = 0;

 	LASSERT(olg == &obd->obd_olg);
 	rc = llog_setup(NULL, obd, olg, LLOG_MDS_OST_ORIG_CTXT, disk_obd,
 			&lov_mds_ost_orig_logops);
 	if (rc)
 		return rc;

 	rc = llog_setup(NULL, obd, olg, LLOG_SIZE_REPL_CTXT, disk_obd,
 			&lov_size_repl_logops);
 	if (rc)
 		GOTO(err_cleanup, rc);

 	obd_getref(obd);
 	/* count may not match lov->desc.ld_tgt_count during dynamic ost add */
 	for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 		if (!lov->lov_tgts[i])
 			continue;

 		if (index && i != *index)
 			continue;

 		child = lov->lov_tgts[i]->ltd_obd;
 		rc = obd_llog_init(child, &child->obd_olg, disk_obd, &i);
 		if (rc)
 			CERROR("error osc_llog_init idx %d osc '%s' tgt '%s' "
 			       "(rc=%d)\n", i, child->obd_name,
 			       disk_obd->obd_name, rc);
 		rc = 0;
 	}
 	obd_putref(obd);
 	GOTO(err_cleanup, rc);
 err_cleanup:
 	if (rc) {
 		struct llog_ctxt *ctxt =
 			llog_get_context(obd, LLOG_SIZE_REPL_CTXT);
 		if (ctxt)
 			llog_cleanup(NULL, ctxt);
 		ctxt = llog_get_context(obd, LLOG_MDS_OST_ORIG_CTXT);
 		if (ctxt)
 			llog_cleanup(NULL, ctxt);
 	}
 	return rc;
 }

 int lov_llog_finish(struct obd_device *obd, int count)
 {
 	struct llog_ctxt *ctxt;

 	/* cleanup our llogs only if the ctxts have been setup
 	 * (client lov doesn't setup, mds lov does). */
 	ctxt = llog_get_context(obd, LLOG_MDS_OST_ORIG_CTXT);
 	if (ctxt)
 		llog_cleanup(NULL, ctxt);

 	ctxt = llog_get_context(obd, LLOG_SIZE_REPL_CTXT);
 	if (ctxt)
 		llog_cleanup(NULL, ctxt);

 	/* lov->tgt llogs are cleaned during osc_cleanup. */
 	return 0;
 }
	/*
	* GPL HEADER START
	*
	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License version 2 only,
	* as published by the Free Software Foundation.
	*
	* This 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).
	*
	* 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
	*
	* 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) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
	* Use is subject to license terms.
	*
	* Copyright (c) 2012, Intel Corporation.
	*/
	/*
	* This file is part of Lustre, http://www.lustre.org/
	* Lustre is a trademark of Sun Microsystems, Inc.
	*
	* lustre/lov/lov_log.c
	*
	* Author: Phil Schwan <phil@clusterfs.com>
	* Author: Peter Braam <braam@clusterfs.com>
	* Author: Mike Shaver <shaver@clusterfs.com>
	*/

	#define DEBUG_SUBSYSTEM S_LOV
	#include <linux/libcfs/libcfs.h>

	#include <obd_support.h>
	#include <lustre_lib.h>
	#include <lustre_net.h>
	#include <lustre/lustre_idl.h>
	#include <lustre_dlm.h>
	#include <lustre_mds.h>
	#include <obd_class.h>
	#include <obd_lov.h>
	#include <obd_ost.h>
	#include <lprocfs_status.h>
	#include <lustre_log.h>

	#include "lov_internal.h"

	/* Add log records for each OSC that this object is striped over, and return
	* cookies for each one. We _would_ have nice abstraction here, except that
	* we need to keep cookies in stripe order, even if some are NULL, so that
	* the right cookies are passed back to the right OSTs at the client side.
	* Unset cookies should be all-zero (which will never occur naturally). */
	static int lov_llog_origin_add(const struct lu_env *env,
	struct llog_ctxt *ctxt,
	struct llog_rec_hdr *rec,
	struct lov_stripe_md *lsm,
	struct llog_cookie *logcookies, int numcookies)
	{
	struct obd_device *obd = ctxt->loc_obd;
	struct lov_obd *lov = &obd->u.lov;
	int i, rc = 0, cookies = 0;

	LASSERTF(logcookies && numcookies >= lsm->lsm_stripe_count,
	"logcookies %p, numcookies %d lsm->lsm_stripe_count %d \n",
	logcookies, numcookies, lsm->lsm_stripe_count);

	for (i = 0; i < lsm->lsm_stripe_count; i++) {
	struct lov_oinfo *loi = lsm->lsm_oinfo[i];
	struct obd_device *child =
	lov->lov_tgts[loi->loi_ost_idx]->ltd_exp->exp_obd;
	struct llog_ctxt *cctxt = llog_get_context(child, ctxt->loc_idx);

	/* fill mds unlink/setattr log record */
	switch (rec->lrh_type) {
	case MDS_UNLINK_REC: {
	struct llog_unlink_rec lur = (struct llog_unlink_rec )rec;
	lur->lur_oid = ostid_id(&loi->loi_oi);
	lur->lur_oseq = (__u32)ostid_seq(&loi->loi_oi);
	break;
	}
	case MDS_SETATTR64_REC: {
	struct llog_setattr64_rec lsr = (struct llog_setattr64_rec )rec;
	lsr->lsr_oi = loi->loi_oi;
	break;
	}
	default:
	break;
	}

	/* inject error in llog_obd_add() below */
	if (OBD_FAIL_CHECK(OBD_FAIL_MDS_FAIL_LOV_LOG_ADD)) {
	llog_ctxt_put(cctxt);
	cctxt = NULL;
	}
	rc = llog_obd_add(env, cctxt, rec, NULL, logcookies + cookies,
	numcookies - cookies);
	llog_ctxt_put(cctxt);
	if (rc < 0) {
	CERROR("Can't add llog (rc = %d) for stripe %d\n",
	rc, cookies);
	memset(logcookies + cookies, 0,
	sizeof(struct llog_cookie));
	rc = 1; /* skip this cookie */
	}
	/* Note that rc is always 1 if llog_obd_add was successful */
	cookies += rc;
	}
	return cookies;
	}

	static int lov_llog_origin_connect(struct llog_ctxt *ctxt,
	struct llog_logid *logid,
	struct llog_gen *gen,
	struct obd_uuid *uuid)
	{
	struct obd_device *obd = ctxt->loc_obd;
	struct lov_obd *lov = &obd->u.lov;
	int i, rc = 0, err = 0;

	obd_getref(obd);
	for (i = 0; i < lov->desc.ld_tgt_count; i++) {
	struct obd_device *child;
	struct llog_ctxt *cctxt;

	if (!lov->lov_tgts[i] \|\| !lov->lov_tgts[i]->ltd_active)
	continue;
	if (uuid && !obd_uuid_equals(uuid, &lov->lov_tgts[i]->ltd_uuid))
	continue;
	CDEBUG(D_CONFIG, "connect %d/%d\n", i, lov->desc.ld_tgt_count);
	child = lov->lov_tgts[i]->ltd_exp->exp_obd;
	cctxt = llog_get_context(child, ctxt->loc_idx);
	rc = llog_connect(cctxt, logid, gen, uuid);
	llog_ctxt_put(cctxt);

	if (rc) {
	CERROR("error osc_llog_connect tgt %d (%d)\n", i, rc);
	if (!err)
	err = rc;
	}
	}
	obd_putref(obd);

	return err;
	}

	/* the replicators commit callback */
	static int lov_llog_repl_cancel(const struct lu_env *env,
	struct llog_ctxt *ctxt,
	struct lov_stripe_md *lsm,
	int count, struct llog_cookie *cookies,
	int flags)
	{
	struct lov_obd *lov;
	struct obd_device *obd = ctxt->loc_obd;
	int rc = 0, i;

	LASSERT(lsm != NULL);
	LASSERT(count == lsm->lsm_stripe_count);

	lov = &obd->u.lov;
	obd_getref(obd);
	for (i = 0; i < count; i++, cookies++) {
	struct lov_oinfo *loi = lsm->lsm_oinfo[i];
	struct obd_device *child =
	lov->lov_tgts[loi->loi_ost_idx]->ltd_exp->exp_obd;
	struct llog_ctxt *cctxt =
	llog_get_context(child, ctxt->loc_idx);
	int err;

	err = llog_cancel(env, cctxt, NULL, 1, cookies, flags);
	llog_ctxt_put(cctxt);
	if (err && lov->lov_tgts[loi->loi_ost_idx]->ltd_active) {
	CERROR("%s: objid "DOSTID" subobj "DOSTID
	" on OST idx %d: rc = %d\n",
	obd->obd_name, POSTID(&lsm->lsm_oi),
	POSTID(&loi->loi_oi), loi->loi_ost_idx, err);
	if (!rc)
	rc = err;
	}
	}
	obd_putref(obd);
	return rc;
	}

	static struct llog_operations lov_mds_ost_orig_logops = {
	.lop_obd_add = lov_llog_origin_add,
	.lop_connect = lov_llog_origin_connect,
	};

	static struct llog_operations lov_size_repl_logops = {
	.lop_cancel = lov_llog_repl_cancel,
	};

	int lov_llog_init(struct obd_device obd, struct obd_llog_group olg,
	struct obd_device disk_obd, int index)
	{
	struct lov_obd *lov = &obd->u.lov;
	struct obd_device *child;
	int i, rc = 0;

	LASSERT(olg == &obd->obd_olg);
	rc = llog_setup(NULL, obd, olg, LLOG_MDS_OST_ORIG_CTXT, disk_obd,
	&lov_mds_ost_orig_logops);
	if (rc)
	return rc;

	rc = llog_setup(NULL, obd, olg, LLOG_SIZE_REPL_CTXT, disk_obd,
	&lov_size_repl_logops);
	if (rc)
	GOTO(err_cleanup, rc);

	obd_getref(obd);
	/* count may not match lov->desc.ld_tgt_count during dynamic ost add */
	for (i = 0; i < lov->desc.ld_tgt_count; i++) {
	if (!lov->lov_tgts[i])
	continue;

	if (index && i != *index)
	continue;

	child = lov->lov_tgts[i]->ltd_obd;
	rc = obd_llog_init(child, &child->obd_olg, disk_obd, &i);
	if (rc)
	CERROR("error osc_llog_init idx %d osc '%s' tgt '%s' "
	"(rc=%d)\n", i, child->obd_name,
	disk_obd->obd_name, rc);
	rc = 0;
	}
	obd_putref(obd);
	GOTO(err_cleanup, rc);
	err_cleanup:
	if (rc) {
	struct llog_ctxt *ctxt =
	llog_get_context(obd, LLOG_SIZE_REPL_CTXT);
	if (ctxt)
	llog_cleanup(NULL, ctxt);
	ctxt = llog_get_context(obd, LLOG_MDS_OST_ORIG_CTXT);
	if (ctxt)
	llog_cleanup(NULL, ctxt);
	}
	return rc;
	}

	int lov_llog_finish(struct obd_device *obd, int count)
	{
	struct llog_ctxt *ctxt;

	/* cleanup our llogs only if the ctxts have been setup
	* (client lov doesn't setup, mds lov does). */
	ctxt = llog_get_context(obd, LLOG_MDS_OST_ORIG_CTXT);
	if (ctxt)
	llog_cleanup(NULL, ctxt);

	ctxt = llog_get_context(obd, LLOG_SIZE_REPL_CTXT);
	if (ctxt)
	llog_cleanup(NULL, ctxt);

	/* lov->tgt llogs are cleaned during osc_cleanup. */
	return 0;
	}