218 lines
5.8 KiB
C
218 lines
5.8 KiB
C
/*
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* GPL HEADER START
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*
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 only,
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License version 2 for more details (a copy is included
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* in the LICENSE file that accompanied this code).
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*
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* You should have received a copy of the GNU General Public License
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* version 2 along with this program; If not, see
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* http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
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*
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* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*
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* GPL HEADER END
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*/
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/*
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* Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
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* Use is subject to license terms.
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*
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* Copyright (c) 2011, Intel Corporation.
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*/
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/*
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* This file is part of Lustre, http://www.lustre.org/
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* Lustre is a trademark of Sun Microsystems, Inc.
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*/
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#define DEBUG_SUBSYSTEM S_LLITE
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#include <linux/module.h>
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#include <linux/types.h>
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#include "../include/lustre_lite.h"
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#include "../include/lustre_ha.h"
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#include "../include/lustre_dlm.h"
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#include <linux/init.h>
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#include <linux/fs.h>
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#include "../include/lprocfs_status.h"
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#include "llite_internal.h"
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static struct kmem_cache *ll_inode_cachep;
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static struct inode *ll_alloc_inode(struct super_block *sb)
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{
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struct ll_inode_info *lli;
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ll_stats_ops_tally(ll_s2sbi(sb), LPROC_LL_ALLOC_INODE, 1);
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lli = kmem_cache_zalloc(ll_inode_cachep, GFP_NOFS);
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if (!lli)
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return NULL;
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inode_init_once(&lli->lli_vfs_inode);
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return &lli->lli_vfs_inode;
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}
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static void ll_inode_destroy_callback(struct rcu_head *head)
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{
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struct inode *inode = container_of(head, struct inode, i_rcu);
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struct ll_inode_info *ptr = ll_i2info(inode);
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kmem_cache_free(ll_inode_cachep, ptr);
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}
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static void ll_destroy_inode(struct inode *inode)
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{
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call_rcu(&inode->i_rcu, ll_inode_destroy_callback);
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}
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/* exported operations */
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struct super_operations lustre_super_operations = {
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.alloc_inode = ll_alloc_inode,
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.destroy_inode = ll_destroy_inode,
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.evict_inode = ll_delete_inode,
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.put_super = ll_put_super,
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.statfs = ll_statfs,
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.umount_begin = ll_umount_begin,
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.remount_fs = ll_remount_fs,
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.show_options = ll_show_options,
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};
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MODULE_ALIAS_FS("lustre");
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void lustre_register_client_process_config(int (*cpc)(struct lustre_cfg *lcfg));
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static int __init lustre_init(void)
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{
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lnet_process_id_t lnet_id;
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struct timespec64 ts;
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int i, rc, seed[2];
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CLASSERT(sizeof(LUSTRE_VOLATILE_HDR) == LUSTRE_VOLATILE_HDR_LEN + 1);
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/* print an address of _any_ initialized kernel symbol from this
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* module, to allow debugging with gdb that doesn't support data
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* symbols from modules.
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*/
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CDEBUG(D_INFO, "Lustre client module (%p).\n",
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&lustre_super_operations);
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rc = -ENOMEM;
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ll_inode_cachep = kmem_cache_create("lustre_inode_cache",
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sizeof(struct ll_inode_info),
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0, SLAB_HWCACHE_ALIGN|SLAB_ACCOUNT,
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NULL);
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if (!ll_inode_cachep)
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goto out_cache;
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ll_file_data_slab = kmem_cache_create("ll_file_data",
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sizeof(struct ll_file_data), 0,
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SLAB_HWCACHE_ALIGN, NULL);
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if (!ll_file_data_slab)
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goto out_cache;
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ll_remote_perm_cachep = kmem_cache_create("ll_remote_perm_cache",
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sizeof(struct ll_remote_perm),
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0, 0, NULL);
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if (!ll_remote_perm_cachep)
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goto out_cache;
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ll_rmtperm_hash_cachep = kmem_cache_create("ll_rmtperm_hash_cache",
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REMOTE_PERM_HASHSIZE *
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sizeof(struct list_head),
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0, 0, NULL);
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if (!ll_rmtperm_hash_cachep)
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goto out_cache;
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llite_root = debugfs_create_dir("llite", debugfs_lustre_root);
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if (IS_ERR_OR_NULL(llite_root)) {
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rc = llite_root ? PTR_ERR(llite_root) : -ENOMEM;
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llite_root = NULL;
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goto out_cache;
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}
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llite_kset = kset_create_and_add("llite", NULL, lustre_kobj);
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if (!llite_kset) {
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rc = -ENOMEM;
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goto out_debugfs;
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}
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cfs_get_random_bytes(seed, sizeof(seed));
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/* Nodes with small feet have little entropy. The NID for this
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* node gives the most entropy in the low bits
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*/
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for (i = 0;; i++) {
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if (LNetGetId(i, &lnet_id) == -ENOENT)
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break;
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if (LNET_NETTYP(LNET_NIDNET(lnet_id.nid)) != LOLND)
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seed[0] ^= LNET_NIDADDR(lnet_id.nid);
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}
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ktime_get_ts64(&ts);
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cfs_srand(ts.tv_sec ^ seed[0], ts.tv_nsec ^ seed[1]);
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rc = vvp_global_init();
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if (rc != 0)
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goto out_sysfs;
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rc = ll_xattr_init();
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if (rc != 0)
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goto out_vvp;
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lustre_register_client_fill_super(ll_fill_super);
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lustre_register_kill_super_cb(ll_kill_super);
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lustre_register_client_process_config(ll_process_config);
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return 0;
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out_vvp:
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vvp_global_fini();
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out_sysfs:
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kset_unregister(llite_kset);
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out_debugfs:
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debugfs_remove(llite_root);
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out_cache:
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kmem_cache_destroy(ll_inode_cachep);
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kmem_cache_destroy(ll_file_data_slab);
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kmem_cache_destroy(ll_remote_perm_cachep);
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kmem_cache_destroy(ll_rmtperm_hash_cachep);
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return rc;
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}
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static void __exit lustre_exit(void)
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{
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lustre_register_client_fill_super(NULL);
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lustre_register_kill_super_cb(NULL);
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lustre_register_client_process_config(NULL);
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debugfs_remove(llite_root);
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kset_unregister(llite_kset);
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ll_xattr_fini();
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vvp_global_fini();
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kmem_cache_destroy(ll_inode_cachep);
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kmem_cache_destroy(ll_rmtperm_hash_cachep);
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kmem_cache_destroy(ll_remote_perm_cachep);
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kmem_cache_destroy(ll_file_data_slab);
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}
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MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
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MODULE_DESCRIPTION("Lustre Client File System");
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MODULE_VERSION(LUSTRE_VERSION_STRING);
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MODULE_LICENSE("GPL");
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module_init(lustre_init);
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module_exit(lustre_exit);
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