[deliverable/linux.git] / drivers / staging / lustre / lustre / lmv / lmv_intent.c

/*
 * 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) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
 * Use is subject to license terms.
 *
 * Copyright (c) 2011, 2012, Intel Corporation.
 */
/*
 * This file is part of Lustre, http://www.lustre.org/
 * Lustre is a trademark of Sun Microsystems, Inc.
 */

#define DEBUG_SUBSYSTEM S_LMV
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/pagemap.h>
#include <asm/div64.h>
#include <linux/seq_file.h>
#include <linux/namei.h>
#include <linux/lustre_intent.h>

#include <obd_support.h>
#include <lustre/lustre_idl.h>
#include <lustre_lib.h>
#include <lustre_net.h>
#include <lustre_dlm.h>
#include <obd_class.h>
#include <lprocfs_status.h>
#include "lmv_internal.h"

static int lmv_intent_remote(struct obd_export *exp, void *lmm,
			     int lmmsize, struct lookup_intent *it,
			     const struct lu_fid *parent_fid, int flags,
			     struct ptlrpc_request **reqp,
			     ldlm_blocking_callback cb_blocking,
			     __u64 extra_lock_flags)
{
	struct obd_device	*obd = exp->exp_obd;
	struct lmv_obd		*lmv = &obd->u.lmv;
	struct ptlrpc_request	*req = NULL;
	struct lustre_handle	plock;
	struct md_op_data	*op_data;
	struct lmv_tgt_desc	*tgt;
	struct mdt_body		*body;
	int			pmode;
	int			rc = 0;

	body = req_capsule_server_get(&(*reqp)->rq_pill, &RMF_MDT_BODY);
	if (body == NULL)
		return -EPROTO;

	LASSERT((body->valid & OBD_MD_MDS));

	/*
	 * Unfortunately, we have to lie to MDC/MDS to retrieve
	 * attributes llite needs and provideproper locking.
	 */
	if (it->it_op & IT_LOOKUP)
		it->it_op = IT_GETATTR;

	/*
	 * We got LOOKUP lock, but we really need attrs.
	 */
	pmode = it->d.lustre.it_lock_mode;
	if (pmode) {
		plock.cookie = it->d.lustre.it_lock_handle;
		it->d.lustre.it_lock_mode = 0;
		it->d.lustre.it_data = NULL;
	}

	LASSERT(fid_is_sane(&body->fid1));

	tgt = lmv_find_target(lmv, &body->fid1);
	if (IS_ERR(tgt))
		GOTO(out, rc = PTR_ERR(tgt));

	OBD_ALLOC_PTR(op_data);
	if (op_data == NULL)
		GOTO(out, rc = -ENOMEM);

	op_data->op_fid1 = body->fid1;
	/* Sent the parent FID to the remote MDT */
	if (parent_fid != NULL) {
		/* The parent fid is only for remote open to
		 * check whether the open is from OBF,
		 * see mdt_cross_open */
		LASSERT(it->it_op & IT_OPEN);
		op_data->op_fid2 = *parent_fid;
		/* Add object FID to op_fid3, in case it needs to check stale
		 * (M_CHECK_STALE), see mdc_finish_intent_lock */
		op_data->op_fid3 = body->fid1;
	}

	op_data->op_bias = MDS_CROSS_REF;
	CDEBUG(D_INODE, "REMOTE_INTENT with fid="DFID" -> mds #%d\n",
	       PFID(&body->fid1), tgt->ltd_idx);

	it->d.lustre.it_disposition &= ~DISP_ENQ_COMPLETE;
	rc = md_intent_lock(tgt->ltd_exp, op_data, lmm, lmmsize, it,
			    flags, &req, cb_blocking, extra_lock_flags);
	if (rc)
		GOTO(out_free_op_data, rc);

	/*
	 * LLite needs LOOKUP lock to track dentry revocation in order to
	 * maintain dcache consistency. Thus drop UPDATE|PERM lock here
	 * and put LOOKUP in request.
	 */
	if (it->d.lustre.it_lock_mode != 0) {
		it->d.lustre.it_remote_lock_handle =
					it->d.lustre.it_lock_handle;
		it->d.lustre.it_remote_lock_mode = it->d.lustre.it_lock_mode;
	}

	it->d.lustre.it_lock_handle = plock.cookie;
	it->d.lustre.it_lock_mode = pmode;

out_free_op_data:
	OBD_FREE_PTR(op_data);
out:
	if (rc && pmode)
		ldlm_lock_decref(&plock, pmode);

	ptlrpc_req_finished(*reqp);
	*reqp = req;
	return rc;
}

/*
 * IT_OPEN is intended to open (and create, possible) an object. Parent (pid)
 * may be split dir.
 */
int lmv_intent_open(struct obd_export *exp, struct md_op_data *op_data,
		    void *lmm, int lmmsize, struct lookup_intent *it,
		    int flags, struct ptlrpc_request **reqp,
		    ldlm_blocking_callback cb_blocking,
		    __u64 extra_lock_flags)
{
	struct obd_device	*obd = exp->exp_obd;
	struct lmv_obd		*lmv = &obd->u.lmv;
	struct lmv_tgt_desc	*tgt;
	struct mdt_body		*body;
	int			rc;

	tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid1);
	if (IS_ERR(tgt))
		return PTR_ERR(tgt);

	/* If it is ready to open the file by FID, do not need
	 * allocate FID at all, otherwise it will confuse MDT */
	if ((it->it_op & IT_CREAT) &&
	    !(it->it_flags & MDS_OPEN_BY_FID)) {
		/*
		 * For open with IT_CREATE and for IT_CREATE cases allocate new
		 * fid and setup FLD for it.
		 */
		op_data->op_fid3 = op_data->op_fid2;
		rc = lmv_fid_alloc(exp, &op_data->op_fid2, op_data);
		if (rc != 0)
			return rc;
	}

	CDEBUG(D_INODE, "OPEN_INTENT with fid1="DFID", fid2="DFID","
	       " name='%s' -> mds #%d\n", PFID(&op_data->op_fid1),
	       PFID(&op_data->op_fid2), op_data->op_name, tgt->ltd_idx);

	rc = md_intent_lock(tgt->ltd_exp, op_data, lmm, lmmsize, it, flags,
			    reqp, cb_blocking, extra_lock_flags);
	if (rc != 0)
		return rc;
	/*
	 * Nothing is found, do not access body->fid1 as it is zero and thus
	 * pointless.
	 */
	if ((it->d.lustre.it_disposition & DISP_LOOKUP_NEG) &&
	    !(it->d.lustre.it_disposition & DISP_OPEN_CREATE) &&
	    !(it->d.lustre.it_disposition & DISP_OPEN_OPEN))
		return rc;

	body = req_capsule_server_get(&(*reqp)->rq_pill, &RMF_MDT_BODY);
	if (body == NULL)
		return -EPROTO;
	/*
	 * Not cross-ref case, just get out of here.
	 */
	if (likely(!(body->valid & OBD_MD_MDS)))
		return 0;

	/*
	 * Okay, MDS has returned success. Probably name has been resolved in
	 * remote inode.
	 */
	rc = lmv_intent_remote(exp, lmm, lmmsize, it, &op_data->op_fid1, flags,
			       reqp, cb_blocking, extra_lock_flags);
	if (rc != 0) {
		LASSERT(rc < 0);
		/*
		 * This is possible, that some userspace application will try to
		 * open file as directory and we will have -ENOTDIR here. As
		 * this is normal situation, we should not print error here,
		 * only debug info.
		 */
		CDEBUG(D_INODE, "Can't handle remote %s: dir "DFID"("DFID"):"
		       "%*s: %d\n", LL_IT2STR(it), PFID(&op_data->op_fid2),
		       PFID(&op_data->op_fid1), op_data->op_namelen,
		       op_data->op_name, rc);
		return rc;
	}

	return rc;
}

/*
 * Handler for: getattr, lookup and revalidate cases.
 */
int lmv_intent_lookup(struct obd_export *exp, struct md_op_data *op_data,
		      void *lmm, int lmmsize, struct lookup_intent *it,
		      int flags, struct ptlrpc_request **reqp,
		      ldlm_blocking_callback cb_blocking,
		      __u64 extra_lock_flags)
{
	struct obd_device      *obd = exp->exp_obd;
	struct lmv_obd	 *lmv = &obd->u.lmv;
	struct lmv_tgt_desc    *tgt = NULL;
	struct mdt_body	*body;
	int		     rc = 0;

	tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid1);
	if (IS_ERR(tgt))
		return PTR_ERR(tgt);

	if (!fid_is_sane(&op_data->op_fid2))
		fid_zero(&op_data->op_fid2);

	CDEBUG(D_INODE, "LOOKUP_INTENT with fid1="DFID", fid2="DFID
	       ", name='%s' -> mds #%d\n", PFID(&op_data->op_fid1),
	       PFID(&op_data->op_fid2),
	       op_data->op_name ? op_data->op_name : "<NULL>",
	       tgt->ltd_idx);

	op_data->op_bias &= ~MDS_CROSS_REF;

	rc = md_intent_lock(tgt->ltd_exp, op_data, lmm, lmmsize, it,
			     flags, reqp, cb_blocking, extra_lock_flags);

	if (rc < 0 || *reqp == NULL)
		return rc;

	/*
	 * MDS has returned success. Probably name has been resolved in
	 * remote inode. Let's check this.
	 */
	body = req_capsule_server_get(&(*reqp)->rq_pill, &RMF_MDT_BODY);
	if (body == NULL)
		return -EPROTO;
	/* Not cross-ref case, just get out of here. */
	if (likely(!(body->valid & OBD_MD_MDS)))
		return 0;

	rc = lmv_intent_remote(exp, lmm, lmmsize, it, NULL, flags, reqp,
			       cb_blocking, extra_lock_flags);

	return rc;
}

int lmv_intent_lock(struct obd_export *exp, struct md_op_data *op_data,
		    void *lmm, int lmmsize, struct lookup_intent *it,
		    int flags, struct ptlrpc_request **reqp,
		    ldlm_blocking_callback cb_blocking,
		    __u64 extra_lock_flags)
{
	struct obd_device *obd = exp->exp_obd;
	int		rc;

	LASSERT(it != NULL);
	LASSERT(fid_is_sane(&op_data->op_fid1));

	CDEBUG(D_INODE, "INTENT LOCK '%s' for '%*s' on "DFID"\n",
	       LL_IT2STR(it), op_data->op_namelen, op_data->op_name,
	       PFID(&op_data->op_fid1));

	rc = lmv_check_connect(obd);
	if (rc)
		return rc;

	if (it->it_op & (IT_LOOKUP | IT_GETATTR | IT_LAYOUT))
		rc = lmv_intent_lookup(exp, op_data, lmm, lmmsize, it,
				       flags, reqp, cb_blocking,
				       extra_lock_flags);
	else if (it->it_op & IT_OPEN)
		rc = lmv_intent_open(exp, op_data, lmm, lmmsize, it,
				     flags, reqp, cb_blocking,
				     extra_lock_flags);
	else
		LBUG();
	return rc;
}
Commit	Line	Data
d7e09d03 PT	1	/*
	2	* GPL HEADER START
	3	*
	4	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License version 2 only,
	8	* as published by the Free Software Foundation.
	9	*
	10	* This program is distributed in the hope that it will be useful, but
	11	* WITHOUT ANY WARRANTY; without even the implied warranty of
	12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	13	* General Public License version 2 for more details (a copy is included
	14	* in the LICENSE file that accompanied this code).
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* version 2 along with this program; If not, see
	18	* http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
	19	*
	20	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
	21	* CA 95054 USA or visit www.sun.com if you need additional information or
	22	* have any questions.
	23	*
	24	* GPL HEADER END
	25	*/
	26	/*
	27	* Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
	28	* Use is subject to license terms.
	29	*
	30	* Copyright (c) 2011, 2012, Intel Corporation.
	31	*/
	32	/*
	33	* This file is part of Lustre, http://www.lustre.org/
	34	* Lustre is a trademark of Sun Microsystems, Inc.
	35	*/
	36
	37	#define DEBUG_SUBSYSTEM S_LMV
	38	#include <linux/slab.h>
	39	#include <linux/module.h>
d7e09d03 PT	40	#include <linux/pagemap.h>
	41	#include <asm/div64.h>
	42	#include <linux/seq_file.h>
	43	#include <linux/namei.h>
	44	#include <linux/lustre_intent.h>
	45
	46	#include <obd_support.h>
	47	#include <lustre/lustre_idl.h>
	48	#include <lustre_lib.h>
	49	#include <lustre_net.h>
	50	#include <lustre_dlm.h>
	51	#include <obd_class.h>
	52	#include <lprocfs_status.h>
	53	#include "lmv_internal.h"
	54
	55	static int lmv_intent_remote(struct obd_export exp, void lmm,
	56	int lmmsize, struct lookup_intent *it,
	57	const struct lu_fid *parent_fid, int flags,
	58	struct ptlrpc_request **reqp,
	59	ldlm_blocking_callback cb_blocking,
	60	__u64 extra_lock_flags)
	61	{
	62	struct obd_device *obd = exp->exp_obd;
	63	struct lmv_obd *lmv = &obd->u.lmv;
	64	struct ptlrpc_request *req = NULL;
	65	struct lustre_handle plock;
	66	struct md_op_data *op_data;
	67	struct lmv_tgt_desc *tgt;
	68	struct mdt_body *body;
	69	int pmode;
	70	int rc = 0;
d7e09d03 PT	71
	72	body = req_capsule_server_get(&(*reqp)->rq_pill, &RMF_MDT_BODY);
	73	if (body == NULL)
0a3bdb00	74	return -EPROTO;
d7e09d03 PT	75
	76	LASSERT((body->valid & OBD_MD_MDS));
	77
	78	/*
	79	* Unfortunately, we have to lie to MDC/MDS to retrieve
	80	* attributes llite needs and provideproper locking.
	81	*/
	82	if (it->it_op & IT_LOOKUP)
	83	it->it_op = IT_GETATTR;
	84
	85	/*
	86	* We got LOOKUP lock, but we really need attrs.
	87	*/
	88	pmode = it->d.lustre.it_lock_mode;
	89	if (pmode) {
	90	plock.cookie = it->d.lustre.it_lock_handle;
	91	it->d.lustre.it_lock_mode = 0;
	92	it->d.lustre.it_data = NULL;
	93	}
	94
	95	LASSERT(fid_is_sane(&body->fid1));
	96
	97	tgt = lmv_find_target(lmv, &body->fid1);
	98	if (IS_ERR(tgt))
	99	GOTO(out, rc = PTR_ERR(tgt));
	100
	101	OBD_ALLOC_PTR(op_data);
	102	if (op_data == NULL)
	103	GOTO(out, rc = -ENOMEM);
	104
	105	op_data->op_fid1 = body->fid1;
	106	/* Sent the parent FID to the remote MDT */
	107	if (parent_fid != NULL) {
	108	/* The parent fid is only for remote open to
	109	* check whether the open is from OBF,
	110	* see mdt_cross_open */
	111	LASSERT(it->it_op & IT_OPEN);
	112	op_data->op_fid2 = *parent_fid;
	113	/* Add object FID to op_fid3, in case it needs to check stale
	114	* (M_CHECK_STALE), see mdc_finish_intent_lock */
	115	op_data->op_fid3 = body->fid1;
	116	}
	117
	118	op_data->op_bias = MDS_CROSS_REF;
	119	CDEBUG(D_INODE, "REMOTE_INTENT with fid="DFID" -> mds #%d\n",
	120	PFID(&body->fid1), tgt->ltd_idx);
	121
	122	it->d.lustre.it_disposition &= ~DISP_ENQ_COMPLETE;
	123	rc = md_intent_lock(tgt->ltd_exp, op_data, lmm, lmmsize, it,
	124	flags, &req, cb_blocking, extra_lock_flags);
	125	if (rc)
	126	GOTO(out_free_op_data, rc);
	127
	128	/*
	129	* LLite needs LOOKUP lock to track dentry revocation in order to
	130	* maintain dcache consistency. Thus drop UPDATE\|PERM lock here
	131	* and put LOOKUP in request.
	132	*/
	133	if (it->d.lustre.it_lock_mode != 0) {
	134	it->d.lustre.it_remote_lock_handle =
	135	it->d.lustre.it_lock_handle;
	136	it->d.lustre.it_remote_lock_mode = it->d.lustre.it_lock_mode;
	137	}
	138
139	it->d.lustre.it_lock_handle = plock.cookie;
140	it->d.lustre.it_lock_mode = pmode;
141
d7e09d03 PT	142	out_free_op_data:
	143	OBD_FREE_PTR(op_data);
	144	out:
	145	if (rc && pmode)
	146	ldlm_lock_decref(&plock, pmode);
	147
	148	ptlrpc_req_finished(*reqp);
	149	*reqp = req;
	150	return rc;
	151	}
	152
	153	/*
	154	* IT_OPEN is intended to open (and create, possible) an object. Parent (pid)
	155	* may be split dir.
	156	*/
	157	int lmv_intent_open(struct obd_export exp, struct md_op_data op_data,
	158	void lmm, int lmmsize, struct lookup_intent it,
	159	int flags, struct ptlrpc_request **reqp,
	160	ldlm_blocking_callback cb_blocking,
	161	__u64 extra_lock_flags)
	162	{
	163	struct obd_device *obd = exp->exp_obd;
	164	struct lmv_obd *lmv = &obd->u.lmv;
	165	struct lmv_tgt_desc *tgt;
	166	struct mdt_body *body;
	167	int rc;
d7e09d03 PT	168
	169	tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid1);
	170	if (IS_ERR(tgt))
0a3bdb00	171	return PTR_ERR(tgt);
d7e09d03 PT	172
	173	/* If it is ready to open the file by FID, do not need
	174	* allocate FID at all, otherwise it will confuse MDT */
	175	if ((it->it_op & IT_CREAT) &&
	176	!(it->it_flags & MDS_OPEN_BY_FID)) {
	177	/*
	178	* For open with IT_CREATE and for IT_CREATE cases allocate new
	179	* fid and setup FLD for it.
	180	*/
	181	op_data->op_fid3 = op_data->op_fid2;
	182	rc = lmv_fid_alloc(exp, &op_data->op_fid2, op_data);
	183	if (rc != 0)
0a3bdb00	184	return rc;
d7e09d03 PT	185	}
	186
	187	CDEBUG(D_INODE, "OPEN_INTENT with fid1="DFID", fid2="DFID","
	188	" name='%s' -> mds #%d\n", PFID(&op_data->op_fid1),
	189	PFID(&op_data->op_fid2), op_data->op_name, tgt->ltd_idx);
	190
	191	rc = md_intent_lock(tgt->ltd_exp, op_data, lmm, lmmsize, it, flags,
	192	reqp, cb_blocking, extra_lock_flags);
	193	if (rc != 0)
0a3bdb00	194	return rc;
d7e09d03 PT	195	/*
	196	* Nothing is found, do not access body->fid1 as it is zero and thus
	197	* pointless.
	198	*/
	199	if ((it->d.lustre.it_disposition & DISP_LOOKUP_NEG) &&
	200	!(it->d.lustre.it_disposition & DISP_OPEN_CREATE) &&
	201	!(it->d.lustre.it_disposition & DISP_OPEN_OPEN))
0a3bdb00	202	return rc;
d7e09d03 PT	203
	204	body = req_capsule_server_get(&(*reqp)->rq_pill, &RMF_MDT_BODY);
	205	if (body == NULL)
0a3bdb00	206	return -EPROTO;
d7e09d03 PT	207	/*
	208	* Not cross-ref case, just get out of here.
	209	*/
	210	if (likely(!(body->valid & OBD_MD_MDS)))
0a3bdb00	211	return 0;
d7e09d03 PT	212
	213	/*
	214	* Okay, MDS has returned success. Probably name has been resolved in
	215	* remote inode.
	216	*/
	217	rc = lmv_intent_remote(exp, lmm, lmmsize, it, &op_data->op_fid1, flags,
	218	reqp, cb_blocking, extra_lock_flags);
	219	if (rc != 0) {
	220	LASSERT(rc < 0);
	221	/*
	222	* This is possible, that some userspace application will try to
	223	* open file as directory and we will have -ENOTDIR here. As
	224	* this is normal situation, we should not print error here,
	225	* only debug info.
	226	*/
	227	CDEBUG(D_INODE, "Can't handle remote %s: dir "DFID"("DFID"):"
	228	"%*s: %d\n", LL_IT2STR(it), PFID(&op_data->op_fid2),
	229	PFID(&op_data->op_fid1), op_data->op_namelen,
	230	op_data->op_name, rc);
0a3bdb00	231	return rc;
d7e09d03 PT	232	}
d7e09d03 PT	233
0a3bdb00	234	return rc;
d7e09d03 PT	235	}
	236
	237	/*
	238	* Handler for: getattr, lookup and revalidate cases.
	239	*/
	240	int lmv_intent_lookup(struct obd_export exp, struct md_op_data op_data,
	241	void lmm, int lmmsize, struct lookup_intent it,
	242	int flags, struct ptlrpc_request **reqp,
	243	ldlm_blocking_callback cb_blocking,
	244	__u64 extra_lock_flags)
	245	{
	246	struct obd_device *obd = exp->exp_obd;
	247	struct lmv_obd *lmv = &obd->u.lmv;
	248	struct lmv_tgt_desc *tgt = NULL;
	249	struct mdt_body *body;
	250	int rc = 0;
d7e09d03 PT	251
	252	tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid1);
	253	if (IS_ERR(tgt))
0a3bdb00	254	return PTR_ERR(tgt);
d7e09d03 PT	255
	256	if (!fid_is_sane(&op_data->op_fid2))
	257	fid_zero(&op_data->op_fid2);
	258
	259	CDEBUG(D_INODE, "LOOKUP_INTENT with fid1="DFID", fid2="DFID
	260	", name='%s' -> mds #%d\n", PFID(&op_data->op_fid1),
	261	PFID(&op_data->op_fid2),
	262	op_data->op_name ? op_data->op_name : "<NULL>",
	263	tgt->ltd_idx);
	264
	265	op_data->op_bias &= ~MDS_CROSS_REF;
	266
	267	rc = md_intent_lock(tgt->ltd_exp, op_data, lmm, lmmsize, it,
	268	flags, reqp, cb_blocking, extra_lock_flags);
	269
	270	if (rc < 0 \|\| *reqp == NULL)
0a3bdb00	271	return rc;
d7e09d03 PT	272
	273	/*
	274	* MDS has returned success. Probably name has been resolved in
	275	* remote inode. Let's check this.
	276	*/
	277	body = req_capsule_server_get(&(*reqp)->rq_pill, &RMF_MDT_BODY);
	278	if (body == NULL)
0a3bdb00	279	return -EPROTO;
d7e09d03 PT	280	/* Not cross-ref case, just get out of here. */
d7e09d03 PT	281	if (likely(!(body->valid & OBD_MD_MDS)))
0a3bdb00	282	return 0;
d7e09d03 PT	283
	284	rc = lmv_intent_remote(exp, lmm, lmmsize, it, NULL, flags, reqp,
	285	cb_blocking, extra_lock_flags);
	286
0a3bdb00	287	return rc;
d7e09d03 PT	288	}
	289
	290	int lmv_intent_lock(struct obd_export exp, struct md_op_data op_data,
	291	void lmm, int lmmsize, struct lookup_intent it,
	292	int flags, struct ptlrpc_request **reqp,
	293	ldlm_blocking_callback cb_blocking,
	294	__u64 extra_lock_flags)
	295	{
	296	struct obd_device *obd = exp->exp_obd;
	297	int rc;
d7e09d03 PT	298
	299	LASSERT(it != NULL);
	300	LASSERT(fid_is_sane(&op_data->op_fid1));
	301
	302	CDEBUG(D_INODE, "INTENT LOCK '%s' for '%*s' on "DFID"\n",
	303	LL_IT2STR(it), op_data->op_namelen, op_data->op_name,
	304	PFID(&op_data->op_fid1));
	305
	306	rc = lmv_check_connect(obd);
	307	if (rc)
0a3bdb00	308	return rc;
d7e09d03 PT	309
	310	if (it->it_op & (IT_LOOKUP \| IT_GETATTR \| IT_LAYOUT))
	311	rc = lmv_intent_lookup(exp, op_data, lmm, lmmsize, it,
	312	flags, reqp, cb_blocking,
	313	extra_lock_flags);
	314	else if (it->it_op & IT_OPEN)
	315	rc = lmv_intent_open(exp, op_data, lmm, lmmsize, it,
	316	flags, reqp, cb_blocking,
	317	extra_lock_flags);
	318	else
	319	LBUG();
0a3bdb00	320	return rc;
d7e09d03	321	}