1 files changed, 0 insertions, 471 deletions
diff --git a/drivers/staging/lustre/lustre/fld/fld_request.c b/drivers/staging/lustre/lustre/fld/fld_request.c
deleted file mode 100644
index 068c364adda8..000000000000
--- a/drivers/staging/lustre/lustre/fld/fld_request.c
+++ /dev/null
@@ -1,471 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * 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.gnu.org/licenses/gpl-2.0.html
- *
- * GPL HEADER END
- */
-/*
- * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
- * Use is subject to license terms.
- *
- * Copyright (c) 2011, 2015, Intel Corporation.
- */
-/*
- * This file is part of Lustre, http://www.lustre.org/
- * Lustre is a trademark of Sun Microsystems, Inc.
- *
- * lustre/fld/fld_request.c
- *
- * FLD (Fids Location Database)
- *
- * Author: Yury Umanets <umka@clusterfs.com>
- */
-
-#define DEBUG_SUBSYSTEM S_FLD
-
-#include <linux/libcfs/libcfs.h>
-#include <linux/module.h>
-#include <asm/div64.h>
-
-#include <obd.h>
-#include <obd_class.h>
-#include <uapi/linux/lustre/lustre_ver.h>
-#include <obd_support.h>
-#include <lprocfs_status.h>
-
-#include <lustre_req_layout.h>
-#include <lustre_fld.h>
-#include <lustre_mdc.h>
-#include "fld_internal.h"
-
-static int fld_rrb_hash(struct lu_client_fld *fld, u64 seq)
-{
-	LASSERT(fld->lcf_count > 0);
-	return do_div(seq, fld->lcf_count);
-}
-
-static struct lu_fld_target *
-fld_rrb_scan(struct lu_client_fld *fld, u64 seq)
-{
-	struct lu_fld_target *target;
-	int hash;
-
-	/* Because almost all of special sequence located in MDT0,
-	 * it should go to index 0 directly, instead of calculating
-	 * hash again, and also if other MDTs is not being connected,
-	 * the fld lookup requests(for seq on MDT0) should not be
-	 * blocked because of other MDTs
-	 */
-	if (fid_seq_is_norm(seq))
-		hash = fld_rrb_hash(fld, seq);
-	else
-		hash = 0;
-
-again:
-	list_for_each_entry(target, &fld->lcf_targets, ft_chain) {
-		if (target->ft_idx == hash)
-			return target;
-	}
-
-	if (hash != 0) {
-		/* It is possible the remote target(MDT) are not connected to
-		 * with client yet, so we will refer this to MDT0, which should
-		 * be connected during mount
-		 */
-		hash = 0;
-		goto again;
-	}
-
-	CERROR("%s: Can't find target by hash %d (seq %#llx). Targets (%d):\n",
-	       fld->lcf_name, hash, seq, fld->lcf_count);
-
-	list_for_each_entry(target, &fld->lcf_targets, ft_chain) {
-		const char *srv_name = target->ft_srv ?
-			target->ft_srv->lsf_name : "<null>";
-		const char *exp_name = target->ft_exp ?
-			(char *)target->ft_exp->exp_obd->obd_uuid.uuid :
-			"<null>";
-
-		CERROR("  exp: 0x%p (%s), srv: 0x%p (%s), idx: %llu\n",
-		       target->ft_exp, exp_name, target->ft_srv,
-		       srv_name, target->ft_idx);
-	}
-
-	/*
-	 * If target is not found, there is logical error anyway, so here is
-	 * LBUG() to catch this situation.
-	 */
-	LBUG();
-	return NULL;
-}
-
-struct lu_fld_hash fld_hash[] = {
-	{
-		.fh_name = "RRB",
-		.fh_hash_func = fld_rrb_hash,
-		.fh_scan_func = fld_rrb_scan
-	},
-	{
-		NULL,
-	}
-};
-
-static struct lu_fld_target *
-fld_client_get_target(struct lu_client_fld *fld, u64 seq)
-{
-	struct lu_fld_target *target;
-
-	LASSERT(fld->lcf_hash);
-
-	spin_lock(&fld->lcf_lock);
-	target = fld->lcf_hash->fh_scan_func(fld, seq);
-	spin_unlock(&fld->lcf_lock);
-
-	if (target) {
-		CDEBUG(D_INFO, "%s: Found target (idx %llu) by seq %#llx\n",
-		       fld->lcf_name, target->ft_idx, seq);
-	}
-
-	return target;
-}
-
-/*
- * Add export to FLD. This is usually done by CMM and LMV as they are main users
- * of FLD module.
- */
-int fld_client_add_target(struct lu_client_fld *fld,
-			  struct lu_fld_target *tar)
-{
-	const char *name;
-	struct lu_fld_target *target, *tmp;
-
-	LASSERT(tar);
-	name = fld_target_name(tar);
-	LASSERT(name);
-	LASSERT(tar->ft_srv || tar->ft_exp);
-
-	CDEBUG(D_INFO, "%s: Adding target %s (idx %llu)\n",
-	       fld->lcf_name, name, tar->ft_idx);
-
-	target = kzalloc(sizeof(*target), GFP_NOFS);
-	if (!target)
-		return -ENOMEM;
-
-	spin_lock(&fld->lcf_lock);
-	list_for_each_entry(tmp, &fld->lcf_targets, ft_chain) {
-		if (tmp->ft_idx == tar->ft_idx) {
-			spin_unlock(&fld->lcf_lock);
-			kfree(target);
-			CERROR("Target %s exists in FLD and known as %s:#%llu\n",
-			       name, fld_target_name(tmp), tmp->ft_idx);
-			return -EEXIST;
-		}
-	}
-
-	target->ft_exp = tar->ft_exp;
-	if (target->ft_exp)
-		class_export_get(target->ft_exp);
-	target->ft_srv = tar->ft_srv;
-	target->ft_idx = tar->ft_idx;
-
-	list_add_tail(&target->ft_chain, &fld->lcf_targets);
-
-	fld->lcf_count++;
-	spin_unlock(&fld->lcf_lock);
-
-	return 0;
-}
-EXPORT_SYMBOL(fld_client_add_target);
-
-/* Remove export from FLD */
-int fld_client_del_target(struct lu_client_fld *fld, __u64 idx)
-{
-	struct lu_fld_target *target, *tmp;
-
-	spin_lock(&fld->lcf_lock);
-	list_for_each_entry_safe(target, tmp, &fld->lcf_targets, ft_chain) {
-		if (target->ft_idx == idx) {
-			fld->lcf_count--;
-			list_del(&target->ft_chain);
-			spin_unlock(&fld->lcf_lock);
-
-			if (target->ft_exp)
-				class_export_put(target->ft_exp);
-
-			kfree(target);
-			return 0;
-		}
-	}
-	spin_unlock(&fld->lcf_lock);
-	return -ENOENT;
-}
-
-static struct dentry *fld_debugfs_dir;
-
-static int fld_client_debugfs_init(struct lu_client_fld *fld)
-{
-	int rc;
-
-	fld->lcf_debugfs_entry = ldebugfs_register(fld->lcf_name,
-						   fld_debugfs_dir,
-						   NULL, NULL);
-
-	if (IS_ERR_OR_NULL(fld->lcf_debugfs_entry)) {
-		CERROR("%s: LdebugFS failed in fld-init\n", fld->lcf_name);
-		rc = fld->lcf_debugfs_entry ? PTR_ERR(fld->lcf_debugfs_entry)
-					    : -ENOMEM;
-		fld->lcf_debugfs_entry = NULL;
-		return rc;
-	}
-
-	rc = ldebugfs_add_vars(fld->lcf_debugfs_entry,
-			       fld_client_debugfs_list, fld);
-	if (rc) {
-		CERROR("%s: Can't init FLD debufs, rc %d\n", fld->lcf_name, rc);
-		goto out_cleanup;
-	}
-
-	return 0;
-
-out_cleanup:
-	fld_client_debugfs_fini(fld);
-	return rc;
-}
-
-void fld_client_debugfs_fini(struct lu_client_fld *fld)
-{
-	if (!IS_ERR_OR_NULL(fld->lcf_debugfs_entry))
-		ldebugfs_remove(&fld->lcf_debugfs_entry);
-}
-EXPORT_SYMBOL(fld_client_debugfs_fini);
-
-static inline int hash_is_sane(int hash)
-{
-	return (hash >= 0 && hash < ARRAY_SIZE(fld_hash));
-}
-
-int fld_client_init(struct lu_client_fld *fld,
-		    const char *prefix, int hash)
-{
-	int cache_size, cache_threshold;
-	int rc;
-
-	snprintf(fld->lcf_name, sizeof(fld->lcf_name),
-		 "cli-%s", prefix);
-
-	if (!hash_is_sane(hash)) {
-		CERROR("%s: Wrong hash function %#x\n",
-		       fld->lcf_name, hash);
-		return -EINVAL;
-	}
-
-	fld->lcf_count = 0;
-	spin_lock_init(&fld->lcf_lock);
-	fld->lcf_hash = &fld_hash[hash];
-	INIT_LIST_HEAD(&fld->lcf_targets);
-
-	cache_size = FLD_CLIENT_CACHE_SIZE /
-		sizeof(struct fld_cache_entry);
-
-	cache_threshold = cache_size *
-		FLD_CLIENT_CACHE_THRESHOLD / 100;
-
-	fld->lcf_cache = fld_cache_init(fld->lcf_name,
-					cache_size, cache_threshold);
-	if (IS_ERR(fld->lcf_cache)) {
-		rc = PTR_ERR(fld->lcf_cache);
-		fld->lcf_cache = NULL;
-		goto out;
-	}
-
-	rc = fld_client_debugfs_init(fld);
-	if (rc)
-		goto out;
-out:
-	if (rc)
-		fld_client_fini(fld);
-	else
-		CDEBUG(D_INFO, "%s: Using \"%s\" hash\n",
-		       fld->lcf_name, fld->lcf_hash->fh_name);
-	return rc;
-}
-EXPORT_SYMBOL(fld_client_init);
-
-void fld_client_fini(struct lu_client_fld *fld)
-{
-	struct lu_fld_target *target, *tmp;
-
-	spin_lock(&fld->lcf_lock);
-	list_for_each_entry_safe(target, tmp, &fld->lcf_targets, ft_chain) {
-		fld->lcf_count--;
-		list_del(&target->ft_chain);
-		if (target->ft_exp)
-			class_export_put(target->ft_exp);
-		kfree(target);
-	}
-	spin_unlock(&fld->lcf_lock);
-
-	if (fld->lcf_cache) {
-		if (!IS_ERR(fld->lcf_cache))
-			fld_cache_fini(fld->lcf_cache);
-		fld->lcf_cache = NULL;
-	}
-}
-EXPORT_SYMBOL(fld_client_fini);
-
-int fld_client_rpc(struct obd_export *exp,
-		   struct lu_seq_range *range, __u32 fld_op,
-		   struct ptlrpc_request **reqp)
-{
-	struct ptlrpc_request *req = NULL;
-	struct lu_seq_range   *prange;
-	__u32		 *op;
-	int		    rc = 0;
-	struct obd_import     *imp;
-
-	LASSERT(exp);
-
-	imp = class_exp2cliimp(exp);
-	switch (fld_op) {
-	case FLD_QUERY:
-		req = ptlrpc_request_alloc_pack(imp, &RQF_FLD_QUERY,
-						LUSTRE_MDS_VERSION, FLD_QUERY);
-		if (!req)
-			return -ENOMEM;
-
-		/*
-		 * XXX: only needed when talking to old server(< 2.6), it should
-		 * be removed when < 2.6 server is not supported
-		 */
-		op = req_capsule_client_get(&req->rq_pill, &RMF_FLD_OPC);
-		*op = FLD_LOOKUP;
-
-		if (imp->imp_connect_flags_orig & OBD_CONNECT_MDS_MDS)
-			req->rq_allow_replay = 1;
-		break;
-	case FLD_READ:
-		req = ptlrpc_request_alloc_pack(imp, &RQF_FLD_READ,
-						LUSTRE_MDS_VERSION, FLD_READ);
-		if (!req)
-			return -ENOMEM;
-
-		req_capsule_set_size(&req->rq_pill, &RMF_GENERIC_DATA,
-				     RCL_SERVER, PAGE_SIZE);
-		break;
-	default:
-		rc = -EINVAL;
-		break;
-	}
-	if (rc)
-		return rc;
-
-	prange = req_capsule_client_get(&req->rq_pill, &RMF_FLD_MDFLD);
-	*prange = *range;
-	ptlrpc_request_set_replen(req);
-	req->rq_request_portal = FLD_REQUEST_PORTAL;
-	req->rq_reply_portal = MDC_REPLY_PORTAL;
-	ptlrpc_at_set_req_timeout(req);
-
-	obd_get_request_slot(&exp->exp_obd->u.cli);
-	rc = ptlrpc_queue_wait(req);
-	obd_put_request_slot(&exp->exp_obd->u.cli);
-	if (rc)
-		goto out_req;
-
-	if (fld_op == FLD_QUERY) {
-		prange = req_capsule_server_get(&req->rq_pill, &RMF_FLD_MDFLD);
-		if (!prange) {
-			rc = -EFAULT;
-			goto out_req;
-		}
-		*range = *prange;
-	}
-
-out_req:
-	if (rc || !reqp) {
-		ptlrpc_req_finished(req);
-		req = NULL;
-	}
-
-	if (reqp)
-		*reqp = req;
-
-	return rc;
-}
-
-int fld_client_lookup(struct lu_client_fld *fld, u64 seq, u32 *mds,
-		      __u32 flags, const struct lu_env *env)
-{
-	struct lu_seq_range res = { 0 };
-	struct lu_fld_target *target;
-	int rc;
-
-	rc = fld_cache_lookup(fld->lcf_cache, seq, &res);
-	if (rc == 0) {
-		*mds = res.lsr_index;
-		return 0;
-	}
-
-	/* Can not find it in the cache */
-	target = fld_client_get_target(fld, seq);
-	LASSERT(target);
-
-	CDEBUG(D_INFO,
-	       "%s: Lookup fld entry (seq: %#llx) on target %s (idx %llu)\n",
-	       fld->lcf_name, seq, fld_target_name(target), target->ft_idx);
-
-	res.lsr_start = seq;
-	fld_range_set_type(&res, flags);
-	rc = fld_client_rpc(target->ft_exp, &res, FLD_QUERY, NULL);
-
-	if (rc == 0) {
-		*mds = res.lsr_index;
-
-		fld_cache_insert(fld->lcf_cache, &res);
-	}
-	return rc;
-}
-EXPORT_SYMBOL(fld_client_lookup);
-
-void fld_client_flush(struct lu_client_fld *fld)
-{
-	fld_cache_flush(fld->lcf_cache);
-}
-
-static int __init fld_init(void)
-{
-	fld_debugfs_dir = ldebugfs_register(LUSTRE_FLD_NAME,
-					    debugfs_lustre_root,
-					    NULL, NULL);
-	return PTR_ERR_OR_ZERO(fld_debugfs_dir);
-}
-
-static void __exit fld_exit(void)
-{
-	if (!IS_ERR_OR_NULL(fld_debugfs_dir))
-		ldebugfs_remove(&fld_debugfs_dir);
-}
-
-MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
-MODULE_DESCRIPTION("Lustre FID Location Database");
-MODULE_VERSION(LUSTRE_VERSION_STRING);
-MODULE_LICENSE("GPL");
-
-module_init(fld_init)
-module_exit(fld_exit)