1 files changed, 0 insertions, 586 deletions
diff --git a/drivers/staging/lustre/lustre/lov/lov_pool.c b/drivers/staging/lustre/lustre/lov/lov_pool.c
deleted file mode 100644
index ecd9329cd073..000000000000
--- a/drivers/staging/lustre/lustre/lov/lov_pool.c
+++ /dev/null
@@ -1,586 +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://http://www.gnu.org/licenses/gpl-2.0.html
- *
- * GPL HEADER END
- */
-/*
- * Copyright (c) 2008, 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_pool.c
- *
- * OST pool methods
- *
- * Author: Jacques-Charles LAFOUCRIERE <jc.lafoucriere@cea.fr>
- * Author: Alex Lyashkov <Alexey.Lyashkov@Sun.COM>
- * Author: Nathaniel Rutman <Nathan.Rutman@Sun.COM>
- */
-
-#define DEBUG_SUBSYSTEM S_LOV
-
-#include <linux/libcfs/libcfs.h>
-
-#include <obd.h>
-#include "lov_internal.h"
-
-#define pool_tgt(_p, _i) \
-		_p->pool_lobd->u.lov.lov_tgts[_p->pool_obds.op_array[_i]]
-
-static void lov_pool_getref(struct pool_desc *pool)
-{
-	CDEBUG(D_INFO, "pool %p\n", pool);
-	atomic_inc(&pool->pool_refcount);
-}
-
-void lov_pool_putref(struct pool_desc *pool)
-{
-	CDEBUG(D_INFO, "pool %p\n", pool);
-	if (atomic_dec_and_test(&pool->pool_refcount)) {
-		LASSERT(hlist_unhashed(&pool->pool_hash));
-		LASSERT(list_empty(&pool->pool_list));
-		LASSERT(!pool->pool_debugfs_entry);
-		lov_ost_pool_free(&pool->pool_obds);
-		kfree(pool);
-	}
-}
-
-static void lov_pool_putref_locked(struct pool_desc *pool)
-{
-	CDEBUG(D_INFO, "pool %p\n", pool);
-	LASSERT(atomic_read(&pool->pool_refcount) > 1);
-
-	atomic_dec(&pool->pool_refcount);
-}
-
-/*
- * hash function using a Rotating Hash algorithm
- * Knuth, D. The Art of Computer Programming,
- * Volume 3: Sorting and Searching,
- * Chapter 6.4.
- * Addison Wesley, 1973
- */
-static __u32 pool_hashfn(struct cfs_hash *hash_body, const void *key,
-			 unsigned int mask)
-{
-	int i;
-	__u32 result;
-	char *poolname;
-
-	result = 0;
-	poolname = (char *)key;
-	for (i = 0; i < LOV_MAXPOOLNAME; i++) {
-		if (poolname[i] == '\0')
-			break;
-		result = (result << 4) ^ (result >> 28) ^  poolname[i];
-	}
-	return (result % mask);
-}
-
-static void *pool_key(struct hlist_node *hnode)
-{
-	struct pool_desc *pool;
-
-	pool = hlist_entry(hnode, struct pool_desc, pool_hash);
-	return pool->pool_name;
-}
-
-static int pool_hashkey_keycmp(const void *key, struct hlist_node *compared_hnode)
-{
-	char *pool_name;
-	struct pool_desc *pool;
-
-	pool_name = (char *)key;
-	pool = hlist_entry(compared_hnode, struct pool_desc, pool_hash);
-	return !strncmp(pool_name, pool->pool_name, LOV_MAXPOOLNAME);
-}
-
-static void *pool_hashobject(struct hlist_node *hnode)
-{
-	return hlist_entry(hnode, struct pool_desc, pool_hash);
-}
-
-static void pool_hashrefcount_get(struct cfs_hash *hs, struct hlist_node *hnode)
-{
-	struct pool_desc *pool;
-
-	pool = hlist_entry(hnode, struct pool_desc, pool_hash);
-	lov_pool_getref(pool);
-}
-
-static void pool_hashrefcount_put_locked(struct cfs_hash *hs,
-					 struct hlist_node *hnode)
-{
-	struct pool_desc *pool;
-
-	pool = hlist_entry(hnode, struct pool_desc, pool_hash);
-	lov_pool_putref_locked(pool);
-}
-
-struct cfs_hash_ops pool_hash_operations = {
-	.hs_hash	= pool_hashfn,
-	.hs_key		= pool_key,
-	.hs_keycmp      = pool_hashkey_keycmp,
-	.hs_object      = pool_hashobject,
-	.hs_get		= pool_hashrefcount_get,
-	.hs_put_locked  = pool_hashrefcount_put_locked,
-
-};
-
-/*
- * pool debugfs seq_file methods
- */
-/*
- * iterator is used to go through the target pool entries
- * index is the current entry index in the lp_array[] array
- * index >= pos returned to the seq_file interface
- * pos is from 0 to (pool->pool_obds.op_count - 1)
- */
-#define POOL_IT_MAGIC 0xB001CEA0
-struct pool_iterator {
-	int magic;
-	struct pool_desc *pool;
-	int idx;	/* from 0 to pool_tgt_size - 1 */
-};
-
-static void *pool_proc_next(struct seq_file *s, void *v, loff_t *pos)
-{
-	struct pool_iterator *iter = (struct pool_iterator *)s->private;
-	int prev_idx;
-
-	LASSERTF(iter->magic == POOL_IT_MAGIC, "%08X\n", iter->magic);
-
-	/* test if end of file */
-	if (*pos >= pool_tgt_count(iter->pool))
-		return NULL;
-
-	/* iterate to find a non empty entry */
-	prev_idx = iter->idx;
-	down_read(&pool_tgt_rw_sem(iter->pool));
-	iter->idx++;
-	if (iter->idx == pool_tgt_count(iter->pool)) {
-		iter->idx = prev_idx; /* we stay on the last entry */
-		up_read(&pool_tgt_rw_sem(iter->pool));
-		return NULL;
-	}
-	up_read(&pool_tgt_rw_sem(iter->pool));
-	(*pos)++;
-	/* return != NULL to continue */
-	return iter;
-}
-
-static void *pool_proc_start(struct seq_file *s, loff_t *pos)
-{
-	struct pool_desc *pool = (struct pool_desc *)s->private;
-	struct pool_iterator *iter;
-
-	lov_pool_getref(pool);
-	if ((pool_tgt_count(pool) == 0) ||
-	    (*pos >= pool_tgt_count(pool))) {
-		/* iter is not created, so stop() has no way to
-		 * find pool to dec ref
-		 */
-		lov_pool_putref(pool);
-		return NULL;
-	}
-
-	iter = kzalloc(sizeof(*iter), GFP_NOFS);
-	if (!iter)
-		return ERR_PTR(-ENOMEM);
-	iter->magic = POOL_IT_MAGIC;
-	iter->pool = pool;
-	iter->idx = 0;
-
-	/* we use seq_file private field to memorized iterator so
-	 * we can free it at stop()
-	 */
-	/* /!\ do not forget to restore it to pool before freeing it */
-	s->private = iter;
-	if (*pos > 0) {
-		loff_t i;
-		void *ptr;
-
-		i = 0;
-		do {
-			ptr = pool_proc_next(s, &iter, &i);
-		} while ((i < *pos) && ptr);
-		return ptr;
-	}
-	return iter;
-}
-
-static void pool_proc_stop(struct seq_file *s, void *v)
-{
-	struct pool_iterator *iter = (struct pool_iterator *)s->private;
-
-	/* in some cases stop() method is called 2 times, without
-	 * calling start() method (see seq_read() from fs/seq_file.c)
-	 * we have to free only if s->private is an iterator
-	 */
-	if ((iter) && (iter->magic == POOL_IT_MAGIC)) {
-		/* we restore s->private so next call to pool_proc_start()
-		 * will work
-		 */
-		s->private = iter->pool;
-		lov_pool_putref(iter->pool);
-		kfree(iter);
-	}
-}
-
-static int pool_proc_show(struct seq_file *s, void *v)
-{
-	struct pool_iterator *iter = (struct pool_iterator *)v;
-	struct lov_tgt_desc *tgt;
-
-	LASSERTF(iter->magic == POOL_IT_MAGIC, "%08X\n", iter->magic);
-	LASSERT(iter->pool);
-	LASSERT(iter->idx <= pool_tgt_count(iter->pool));
-
-	down_read(&pool_tgt_rw_sem(iter->pool));
-	tgt = pool_tgt(iter->pool, iter->idx);
-	up_read(&pool_tgt_rw_sem(iter->pool));
-	if (tgt)
-		seq_printf(s, "%s\n", obd_uuid2str(&tgt->ltd_uuid));
-
-	return 0;
-}
-
-static const struct seq_operations pool_proc_ops = {
-	.start	  = pool_proc_start,
-	.next	   = pool_proc_next,
-	.stop	   = pool_proc_stop,
-	.show	   = pool_proc_show,
-};
-
-static int pool_proc_open(struct inode *inode, struct file *file)
-{
-	int rc;
-
-	rc = seq_open(file, &pool_proc_ops);
-	if (!rc) {
-		struct seq_file *s = file->private_data;
-
-		s->private = inode->i_private;
-	}
-	return rc;
-}
-
-static const struct file_operations pool_proc_operations = {
-	.open	   = pool_proc_open,
-	.read	   = seq_read,
-	.llseek	 = seq_lseek,
-	.release	= seq_release,
-};
-
-#define LOV_POOL_INIT_COUNT 2
-int lov_ost_pool_init(struct ost_pool *op, unsigned int count)
-{
-	if (count == 0)
-		count = LOV_POOL_INIT_COUNT;
-	op->op_array = NULL;
-	op->op_count = 0;
-	init_rwsem(&op->op_rw_sem);
-	op->op_size = count;
-	op->op_array = kcalloc(op->op_size, sizeof(op->op_array[0]), GFP_NOFS);
-	if (!op->op_array) {
-		op->op_size = 0;
-		return -ENOMEM;
-	}
-	return 0;
-}
-
-/* Caller must hold write op_rwlock */
-int lov_ost_pool_extend(struct ost_pool *op, unsigned int min_count)
-{
-	__u32 *new;
-	int new_size;
-
-	LASSERT(min_count != 0);
-
-	if (op->op_count < op->op_size)
-		return 0;
-
-	new_size = max(min_count, 2 * op->op_size);
-	new = kcalloc(new_size, sizeof(op->op_array[0]), GFP_NOFS);
-	if (!new)
-		return -ENOMEM;
-
-	/* copy old array to new one */
-	memcpy(new, op->op_array, op->op_size * sizeof(op->op_array[0]));
-	kfree(op->op_array);
-	op->op_array = new;
-	op->op_size = new_size;
-	return 0;
-}
-
-int lov_ost_pool_add(struct ost_pool *op, __u32 idx, unsigned int min_count)
-{
-	int rc = 0, i;
-
-	down_write(&op->op_rw_sem);
-
-	rc = lov_ost_pool_extend(op, min_count);
-	if (rc)
-		goto out;
-
-	/* search ost in pool array */
-	for (i = 0; i < op->op_count; i++) {
-		if (op->op_array[i] == idx) {
-			rc = -EEXIST;
-			goto out;
-		}
-	}
-	/* ost not found we add it */
-	op->op_array[op->op_count] = idx;
-	op->op_count++;
-out:
-	up_write(&op->op_rw_sem);
-	return rc;
-}
-
-int lov_ost_pool_remove(struct ost_pool *op, __u32 idx)
-{
-	int i;
-
-	down_write(&op->op_rw_sem);
-
-	for (i = 0; i < op->op_count; i++) {
-		if (op->op_array[i] == idx) {
-			memmove(&op->op_array[i], &op->op_array[i + 1],
-				(op->op_count - i - 1) * sizeof(op->op_array[0]));
-			op->op_count--;
-			up_write(&op->op_rw_sem);
-			return 0;
-		}
-	}
-
-	up_write(&op->op_rw_sem);
-	return -EINVAL;
-}
-
-int lov_ost_pool_free(struct ost_pool *op)
-{
-	if (op->op_size == 0)
-		return 0;
-
-	down_write(&op->op_rw_sem);
-
-	kfree(op->op_array);
-	op->op_array = NULL;
-	op->op_count = 0;
-	op->op_size = 0;
-
-	up_write(&op->op_rw_sem);
-	return 0;
-}
-
-int lov_pool_new(struct obd_device *obd, char *poolname)
-{
-	struct lov_obd *lov;
-	struct pool_desc *new_pool;
-	int rc;
-
-	lov = &obd->u.lov;
-
-	if (strlen(poolname) > LOV_MAXPOOLNAME)
-		return -ENAMETOOLONG;
-
-	new_pool = kzalloc(sizeof(*new_pool), GFP_NOFS);
-	if (!new_pool)
-		return -ENOMEM;
-
-	strlcpy(new_pool->pool_name, poolname, sizeof(new_pool->pool_name));
-	new_pool->pool_lobd = obd;
-	/* ref count init to 1 because when created a pool is always used
-	 * up to deletion
-	 */
-	atomic_set(&new_pool->pool_refcount, 1);
-	rc = lov_ost_pool_init(&new_pool->pool_obds, 0);
-	if (rc)
-		goto out_err;
-
-	INIT_HLIST_NODE(&new_pool->pool_hash);
-
-	/* get ref for debugfs file */
-	lov_pool_getref(new_pool);
-	new_pool->pool_debugfs_entry = ldebugfs_add_simple(
-						lov->lov_pool_debugfs_entry,
-						poolname, new_pool,
-						&pool_proc_operations);
-	if (IS_ERR_OR_NULL(new_pool->pool_debugfs_entry)) {
-		CWARN("Cannot add debugfs pool entry " LOV_POOLNAMEF "\n",
-		      poolname);
-		new_pool->pool_debugfs_entry = NULL;
-		lov_pool_putref(new_pool);
-	}
-	CDEBUG(D_INFO, "pool %p - proc %p\n",
-	       new_pool, new_pool->pool_debugfs_entry);
-
-	spin_lock(&obd->obd_dev_lock);
-	list_add_tail(&new_pool->pool_list, &lov->lov_pool_list);
-	lov->lov_pool_count++;
-	spin_unlock(&obd->obd_dev_lock);
-
-	/* add to find only when it fully ready  */
-	rc = cfs_hash_add_unique(lov->lov_pools_hash_body, poolname,
-				 &new_pool->pool_hash);
-	if (rc) {
-		rc = -EEXIST;
-		goto out_err;
-	}
-
-	CDEBUG(D_CONFIG, LOV_POOLNAMEF " is pool #%d\n",
-	       poolname, lov->lov_pool_count);
-
-	return 0;
-
-out_err:
-	spin_lock(&obd->obd_dev_lock);
-	list_del_init(&new_pool->pool_list);
-	lov->lov_pool_count--;
-	spin_unlock(&obd->obd_dev_lock);
-	ldebugfs_remove(&new_pool->pool_debugfs_entry);
-	lov_ost_pool_free(&new_pool->pool_obds);
-	kfree(new_pool);
-
-	return rc;
-}
-
-int lov_pool_del(struct obd_device *obd, char *poolname)
-{
-	struct lov_obd *lov;
-	struct pool_desc *pool;
-
-	lov = &obd->u.lov;
-
-	/* lookup and kill hash reference */
-	pool = cfs_hash_del_key(lov->lov_pools_hash_body, poolname);
-	if (!pool)
-		return -ENOENT;
-
-	if (!IS_ERR_OR_NULL(pool->pool_debugfs_entry)) {
-		CDEBUG(D_INFO, "proc entry %p\n", pool->pool_debugfs_entry);
-		ldebugfs_remove(&pool->pool_debugfs_entry);
-		lov_pool_putref(pool);
-	}
-
-	spin_lock(&obd->obd_dev_lock);
-	list_del_init(&pool->pool_list);
-	lov->lov_pool_count--;
-	spin_unlock(&obd->obd_dev_lock);
-
-	/* release last reference */
-	lov_pool_putref(pool);
-
-	return 0;
-}
-
-int lov_pool_add(struct obd_device *obd, char *poolname, char *ostname)
-{
-	struct obd_uuid ost_uuid;
-	struct lov_obd *lov;
-	struct pool_desc *pool;
-	unsigned int lov_idx;
-	int rc;
-
-	lov = &obd->u.lov;
-
-	pool = cfs_hash_lookup(lov->lov_pools_hash_body, poolname);
-	if (!pool)
-		return -ENOENT;
-
-	obd_str2uuid(&ost_uuid, ostname);
-
-	/* search ost in lov array */
-	obd_getref(obd);
-	for (lov_idx = 0; lov_idx < lov->desc.ld_tgt_count; lov_idx++) {
-		if (!lov->lov_tgts[lov_idx])
-			continue;
-		if (obd_uuid_equals(&ost_uuid,
-				    &lov->lov_tgts[lov_idx]->ltd_uuid))
-			break;
-	}
-	/* test if ost found in lov */
-	if (lov_idx == lov->desc.ld_tgt_count) {
-		rc = -EINVAL;
-		goto out;
-	}
-
-	rc = lov_ost_pool_add(&pool->pool_obds, lov_idx, lov->lov_tgt_size);
-	if (rc)
-		goto out;
-
-	CDEBUG(D_CONFIG, "Added %s to " LOV_POOLNAMEF " as member %d\n",
-	       ostname, poolname,  pool_tgt_count(pool));
-
-out:
-	obd_putref(obd);
-	lov_pool_putref(pool);
-	return rc;
-}
-
-int lov_pool_remove(struct obd_device *obd, char *poolname, char *ostname)
-{
-	struct obd_uuid ost_uuid;
-	struct lov_obd *lov;
-	struct pool_desc *pool;
-	unsigned int lov_idx;
-	int rc = 0;
-
-	lov = &obd->u.lov;
-
-	pool = cfs_hash_lookup(lov->lov_pools_hash_body, poolname);
-	if (!pool)
-		return -ENOENT;
-
-	obd_str2uuid(&ost_uuid, ostname);
-
-	obd_getref(obd);
-	/* search ost in lov array, to get index */
-	for (lov_idx = 0; lov_idx < lov->desc.ld_tgt_count; lov_idx++) {
-		if (!lov->lov_tgts[lov_idx])
-			continue;
-
-		if (obd_uuid_equals(&ost_uuid,
-				    &lov->lov_tgts[lov_idx]->ltd_uuid))
-			break;
-	}
-
-	/* test if ost found in lov */
-	if (lov_idx == lov->desc.ld_tgt_count) {
-		rc = -EINVAL;
-		goto out;
-	}
-
-	lov_ost_pool_remove(&pool->pool_obds, lov_idx);
-
-	CDEBUG(D_CONFIG, "%s removed from " LOV_POOLNAMEF "\n", ostname,
-	       poolname);
-
-out:
-	obd_putref(obd);
-	lov_pool_putref(pool);
-	return rc;
-}