229 lines
6.2 KiB
C
229 lines
6.2 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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OBD_SLAB_ALLOC_PTR_GFP(lli, ll_inode_cachep, GFP_NOFS);
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if (lli == NULL)
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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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OBD_SLAB_FREE_PTR(ptr, ll_inode_cachep);
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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 init_lustre_lite(void)
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{
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struct proc_dir_entry *entry;
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lnet_process_id_t lnet_id;
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struct timeval tv;
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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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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, NULL);
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if (ll_inode_cachep == NULL)
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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 == NULL)
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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 == NULL)
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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 == NULL)
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goto out_cache;
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entry = lprocfs_register("llite", proc_lustre_root, NULL, NULL);
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if (IS_ERR(entry)) {
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rc = PTR_ERR(entry);
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CERROR("cannot register '/proc/fs/lustre/llite': rc = %d\n",
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rc);
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goto out_cache;
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}
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proc_lustre_fs_root = entry;
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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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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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do_gettimeofday(&tv);
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cfs_srand(tv.tv_sec ^ seed[0], tv.tv_usec ^ seed[1]);
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init_timer(&ll_capa_timer);
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ll_capa_timer.function = ll_capa_timer_callback;
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rc = ll_capa_thread_start();
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if (rc != 0)
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goto out_proc;
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rc = vvp_global_init();
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if (rc != 0)
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goto out_capa;
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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_capa:
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del_timer(&ll_capa_timer);
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ll_capa_thread_stop();
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out_proc:
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lprocfs_remove(&proc_lustre_fs_root);
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out_cache:
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if (ll_inode_cachep != NULL)
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kmem_cache_destroy(ll_inode_cachep);
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if (ll_file_data_slab != NULL)
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kmem_cache_destroy(ll_file_data_slab);
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if (ll_remote_perm_cachep != NULL)
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kmem_cache_destroy(ll_remote_perm_cachep);
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if (ll_rmtperm_hash_cachep != NULL)
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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 exit_lustre_lite(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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lprocfs_remove(&proc_lustre_fs_root);
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ll_xattr_fini();
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vvp_global_fini();
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del_timer(&ll_capa_timer);
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ll_capa_thread_stop();
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LASSERTF(capa_count[CAPA_SITE_CLIENT] == 0,
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"client remaining capa count %d\n",
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capa_count[CAPA_SITE_CLIENT]);
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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("Sun Microsystems, Inc. <http://www.lustre.org/>");
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MODULE_DESCRIPTION("Lustre Lite Client File System");
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MODULE_LICENSE("GPL");
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module_init(init_lustre_lite);
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module_exit(exit_lustre_lite);
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