/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*- * vim:expandtab:shiftwidth=8:tabstop=8: * * 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.sun.com/software/products/lustre/docs/GPLv2.pdf * * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, * CA 95054 USA or visit www.sun.com if you need additional information or * have any questions. * * GPL HEADER END */ /* * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved. * Use is subject to license terms. */ /* * This file is part of Lustre, http://www.lustre.org/ * Lustre is a trademark of Sun Microsystems, Inc. */ #define DEBUG_SUBSYSTEM S_LLITE #include #include #include #include #include #include #include #include #include #include "llite_internal.h" static cfs_mem_cache_t *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); OBD_SLAB_ALLOC_PTR_GFP(lli, ll_inode_cachep, CFS_ALLOC_IO); if (lli == NULL) return NULL; inode_init_once(&lli->lli_vfs_inode); ll_lli_init(lli); return &lli->lli_vfs_inode; } static void ll_destroy_inode(struct inode *inode) { struct ll_inode_info *ptr = ll_i2info(inode); OBD_SLAB_FREE_PTR(ptr, ll_inode_cachep); } int ll_init_inodecache(void) { ll_inode_cachep = cfs_mem_cache_create("lustre_inode_cache", sizeof(struct ll_inode_info), 0, CFS_SLAB_HWCACHE_ALIGN); if (ll_inode_cachep == NULL) return -ENOMEM; return 0; } void ll_destroy_inodecache(void) { int rc; rc = cfs_mem_cache_destroy(ll_inode_cachep); LASSERTF(rc == 0, "ll_inode_cache: not all structures were freed\n"); } /* exported operations */ struct super_operations lustre_super_operations = { .alloc_inode = ll_alloc_inode, .destroy_inode = ll_destroy_inode, .clear_inode = ll_clear_inode, .delete_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, }; void lustre_register_client_process_config(int (*cpc)(struct lustre_cfg *lcfg)); int vvp_global_init(void); void vvp_global_fini(void); static int __init init_lustre_lite(void) { int i, rc, seed[2]; struct timeval tv; lnet_process_id_t lnet_id; #ifndef CRAY_XT3 /* 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_CONSOLE, "Lustre client module (%p).\n", &lustre_super_operations); #endif rc = ll_init_inodecache(); if (rc) return -ENOMEM; ll_file_data_slab = cfs_mem_cache_create("ll_file_data", sizeof(struct ll_file_data), 0, CFS_SLAB_HWCACHE_ALIGN); if (ll_file_data_slab == NULL) { ll_destroy_inodecache(); return -ENOMEM; } ll_remote_perm_cachep = cfs_mem_cache_create("ll_remote_perm_cache", sizeof(struct ll_remote_perm), 0, 0); if (ll_remote_perm_cachep == NULL) { cfs_mem_cache_destroy(ll_file_data_slab); ll_file_data_slab = NULL; ll_destroy_inodecache(); return -ENOMEM; } ll_rmtperm_hash_cachep = cfs_mem_cache_create("ll_rmtperm_hash_cache", REMOTE_PERM_HASHSIZE * sizeof(cfs_list_t), 0, 0); if (ll_rmtperm_hash_cachep == NULL) { cfs_mem_cache_destroy(ll_remote_perm_cachep); ll_remote_perm_cachep = NULL; cfs_mem_cache_destroy(ll_file_data_slab); ll_file_data_slab = NULL; ll_destroy_inodecache(); return -ENOMEM; } proc_lustre_fs_root = proc_lustre_root ? lprocfs_register("llite", proc_lustre_root, NULL, NULL) : NULL; lustre_register_client_fill_super(ll_fill_super); lustre_register_kill_super_cb(ll_kill_super); lustre_register_client_process_config(ll_process_config); 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); } } cfs_gettimeofday(&tv); cfs_srand(tv.tv_sec ^ seed[0], tv.tv_usec ^ seed[1]); init_timer(&ll_capa_timer); ll_capa_timer.function = ll_capa_timer_callback; rc = ll_capa_thread_start(); /* * XXX normal cleanup is needed here. */ if (rc == 0) rc = vvp_global_init(); return rc; } static void __exit exit_lustre_lite(void) { int rc; vvp_global_fini(); del_timer(&ll_capa_timer); ll_capa_thread_stop(); LASSERTF(capa_count[CAPA_SITE_CLIENT] == 0, "client remaining capa count %d\n", capa_count[CAPA_SITE_CLIENT]); lustre_register_client_fill_super(NULL); lustre_register_kill_super_cb(NULL); lustre_register_client_process_config(NULL); ll_destroy_inodecache(); rc = cfs_mem_cache_destroy(ll_rmtperm_hash_cachep); LASSERTF(rc == 0, "couldn't destroy ll_rmtperm_hash_cachep\n"); ll_rmtperm_hash_cachep = NULL; rc = cfs_mem_cache_destroy(ll_remote_perm_cachep); LASSERTF(rc == 0, "couldn't destroy ll_remote_perm_cachep\n"); ll_remote_perm_cachep = NULL; rc = cfs_mem_cache_destroy(ll_file_data_slab); LASSERTF(rc == 0, "couldn't destroy ll_file_data slab\n"); if (proc_lustre_fs_root) lprocfs_remove(&proc_lustre_fs_root); } MODULE_AUTHOR("Sun Microsystems, Inc. "); MODULE_DESCRIPTION("Lustre Lite Client File System"); MODULE_LICENSE("GPL"); module_init(init_lustre_lite); module_exit(exit_lustre_lite);