--- /dev/null
+/*
+ * 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.
+ *
+ * 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_lite.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);
+ OBD_SLAB_ALLOC_PTR_GFP(lli, ll_inode_cachep, GFP_NOFS);
+ if (lli == NULL)
+ 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);
+ OBD_SLAB_FREE_PTR(ptr, ll_inode_cachep);
+}
+
+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");
+
+void lustre_register_client_process_config(int (*cpc)(struct lustre_cfg *lcfg));
+
+static int __init init_lustre_lite(void)
+{
+ struct proc_dir_entry *entry;
+ lnet_process_id_t lnet_id;
+ struct timeval tv;
+ int i, rc, seed[2];
+
+ CLASSERT(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, NULL);
+ if (ll_inode_cachep == NULL)
+ 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 == NULL)
+ goto out_cache;
+
+ ll_remote_perm_cachep = kmem_cache_create("ll_remote_perm_cache",
+ sizeof(struct ll_remote_perm),
+ 0, 0, NULL);
+ if (ll_remote_perm_cachep == NULL)
+ goto out_cache;
+
+ ll_rmtperm_hash_cachep = kmem_cache_create("ll_rmtperm_hash_cache",
+ REMOTE_PERM_HASHSIZE *
+ sizeof(struct list_head),
+ 0, 0, NULL);
+ if (ll_rmtperm_hash_cachep == NULL)
+ goto out_cache;
+
+ entry = lprocfs_register("llite", proc_lustre_root, NULL, NULL);
+ if (IS_ERR(entry)) {
+ rc = PTR_ERR(entry);
+ CERROR("cannot register '/proc/fs/lustre/llite': rc = %d\n",
+ rc);
+ goto out_cache;
+ }
+
+ proc_lustre_fs_root = entry;
+
+ 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);
+ }
+
+ do_gettimeofday(&tv);
+ cfs_srand(tv.tv_sec ^ seed[0], tv.tv_usec ^ seed[1]);
+ setup_timer(&ll_capa_timer, ll_capa_timer_callback, 0);
+ rc = ll_capa_thread_start();
+ if (rc != 0)
+ goto out_proc;
+
+ rc = vvp_global_init();
+ if (rc != 0)
+ goto out_capa;
+
+ rc = ll_xattr_init();
+ if (rc != 0)
+ goto out_vvp;
+
+ 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_vvp:
+ vvp_global_fini();
+out_capa:
+ del_timer(&ll_capa_timer);
+ ll_capa_thread_stop();
+out_proc:
+ lprocfs_remove(&proc_lustre_fs_root);
+out_cache:
+ if (ll_inode_cachep != NULL)
+ kmem_cache_destroy(ll_inode_cachep);
+
+ if (ll_file_data_slab != NULL)
+ kmem_cache_destroy(ll_file_data_slab);
+
+ if (ll_remote_perm_cachep != NULL)
+ kmem_cache_destroy(ll_remote_perm_cachep);
+
+ if (ll_rmtperm_hash_cachep != NULL)
+ kmem_cache_destroy(ll_rmtperm_hash_cachep);
+
+ return rc;
+}
+
+static void __exit exit_lustre_lite(void)
+{
+ lustre_register_client_fill_super(NULL);
+ lustre_register_kill_super_cb(NULL);
+ lustre_register_client_process_config(NULL);
+
+ lprocfs_remove(&proc_lustre_fs_root);
+
+ ll_xattr_fini();
+ 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]);
+
+ kmem_cache_destroy(ll_inode_cachep);
+ kmem_cache_destroy(ll_rmtperm_hash_cachep);
+
+ kmem_cache_destroy(ll_remote_perm_cachep);
+
+ kmem_cache_destroy(ll_file_data_slab);
+}
+
+MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
+MODULE_DESCRIPTION("Lustre Lite Client File System");
+MODULE_LICENSE("GPL");
+
+module_init(init_lustre_lite);
+module_exit(exit_lustre_lite);
Code Review / kvmfornfv.git / blobdiff