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/*
* 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) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
* Copyright (c) 2011, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
* Lustre is a trademark of Sun Microsystems, Inc.
*/
#define DEBUG_SUBSYSTEM S_LLITE
#include <linux/module.h>
#include <linux/types.h>
#include "../include/lustre_ha.h"
#include "../include/lustre_dlm.h"
#include <linux/init.h>
#include <linux/fs.h>
#include "../include/lprocfs_status.h"
#include "llite_internal.h"
static struct kmem_cache *ll_inode_cachep;
static struct inode *ll_alloc_inode(struct super_block *sb)
{
struct ll_inode_info *lli;
ll_stats_ops_tally(ll_s2sbi(sb), LPROC_LL_ALLOC_INODE, 1);
lli = kmem_cache_zalloc(ll_inode_cachep, GFP_NOFS);
if (!lli)
return NULL;
inode_init_once(&lli->lli_vfs_inode);
return &lli->lli_vfs_inode;
}
static void ll_inode_destroy_callback(struct rcu_head *head)
{
struct inode *inode = container_of(head, struct inode, i_rcu);
struct ll_inode_info *ptr = ll_i2info(inode);
kmem_cache_free(ll_inode_cachep, ptr);
}
static void ll_destroy_inode(struct inode *inode)
{
call_rcu(&inode->i_rcu, ll_inode_destroy_callback);
}
/* exported operations */
struct super_operations lustre_super_operations = {
.alloc_inode = ll_alloc_inode,
.destroy_inode = ll_destroy_inode,
.evict_inode = ll_delete_inode,
.put_super = ll_put_super,
.statfs = ll_statfs,
.umount_begin = ll_umount_begin,
.remount_fs = ll_remount_fs,
.show_options = ll_show_options,
};
MODULE_ALIAS_FS("lustre");
static int __init lustre_init(void)
{
struct lnet_process_id lnet_id;
struct timespec64 ts;
int i, rc, seed[2];
BUILD_BUG_ON(sizeof(LUSTRE_VOLATILE_HDR) != LUSTRE_VOLATILE_HDR_LEN + 1);
/* print an address of _any_ initialized kernel symbol from this
* module, to allow debugging with gdb that doesn't support data
* symbols from modules.
*/
CDEBUG(D_INFO, "Lustre client module (%p).\n",
&lustre_super_operations);
rc = -ENOMEM;
ll_inode_cachep = kmem_cache_create("lustre_inode_cache",
sizeof(struct ll_inode_info), 0,
SLAB_HWCACHE_ALIGN | SLAB_ACCOUNT,
NULL);
if (!ll_inode_cachep)
goto out_cache;
ll_file_data_slab = kmem_cache_create("ll_file_data",
sizeof(struct ll_file_data), 0,
SLAB_HWCACHE_ALIGN, NULL);
if (!ll_file_data_slab)
goto out_cache;
llite_root = debugfs_create_dir("llite", debugfs_lustre_root);
if (IS_ERR_OR_NULL(llite_root)) {
rc = llite_root ? PTR_ERR(llite_root) : -ENOMEM;
llite_root = NULL;
goto out_cache;
}
llite_kset = kset_create_and_add("llite", NULL, lustre_kobj);
if (!llite_kset) {
rc = -ENOMEM;
goto out_debugfs;
}
cfs_get_random_bytes(seed, sizeof(seed));
/* Nodes with small feet have little entropy. The NID for this
* node gives the most entropy in the low bits
*/
for (i = 0;; i++) {
if (LNetGetId(i, &lnet_id) == -ENOENT)
break;
if (LNET_NETTYP(LNET_NIDNET(lnet_id.nid)) != LOLND)
seed[0] ^= LNET_NIDADDR(lnet_id.nid);
}
ktime_get_ts64(&ts);
cfs_srand(ts.tv_sec ^ seed[0], ts.tv_nsec ^ seed[1]);
rc = vvp_global_init();
if (rc != 0)
goto out_sysfs;
cl_inode_fini_env = cl_env_alloc(&cl_inode_fini_refcheck,
LCT_REMEMBER | LCT_NOREF);
if (IS_ERR(cl_inode_fini_env)) {
rc = PTR_ERR(cl_inode_fini_env);
goto out_vvp;
}
cl_inode_fini_env->le_ctx.lc_cookie = 0x4;
rc = ll_xattr_init();
if (rc != 0)
goto out_inode_fini_env;
lustre_register_client_fill_super(ll_fill_super);
lustre_register_kill_super_cb(ll_kill_super);
lustre_register_client_process_config(ll_process_config);
return 0;
out_inode_fini_env:
cl_env_put(cl_inode_fini_env, &cl_inode_fini_refcheck);
out_vvp:
vvp_global_fini();
out_sysfs:
kset_unregister(llite_kset);
out_debugfs:
debugfs_remove(llite_root);
out_cache:
kmem_cache_destroy(ll_inode_cachep);
kmem_cache_destroy(ll_file_data_slab);
return rc;
}
static void __exit lustre_exit(void)
{
lustre_register_client_fill_super(NULL);
lustre_register_kill_super_cb(NULL);
lustre_register_client_process_config(NULL);
debugfs_remove(llite_root);
kset_unregister(llite_kset);
ll_xattr_fini();
cl_env_put(cl_inode_fini_env, &cl_inode_fini_refcheck);
vvp_global_fini();
kmem_cache_destroy(ll_inode_cachep);
kmem_cache_destroy(ll_file_data_slab);
}
MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
MODULE_DESCRIPTION("Lustre Client File System");
MODULE_VERSION(LUSTRE_VERSION_STRING);
MODULE_LICENSE("GPL");
module_init(lustre_init);
module_exit(lustre_exit);
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