-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
+/*
+ * GPL HEADER START
*
- * Lustre Light Super operations
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
- * Copyright (c) 2002, 2003 Cluster File Systems, Inc.
+ * 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 file is part of Lustre, http://www.lustre.org.
+ * 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).
*
- * Lustre is free software; you can redistribute it and/or
- * modify it under the terms of version 2 of the GNU General Public
- * License as published by the Free Software Foundation.
+ * 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
*
- * Lustre 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 for more details.
+ * GPL HEADER END
+ */
+/*
+ * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Use is subject to license terms.
*
- * You should have received a copy of the GNU General Public License
- * along with Lustre; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ * Copyright (c) 2011, 2016, Intel Corporation.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
*/
#define DEBUG_SUBSYSTEM S_LLITE
+#define D_MOUNT (D_SUPER | D_CONFIG/*|D_WARNING */)
+
#include <linux/module.h>
#include <linux/types.h>
-#include <linux/random.h>
#include <linux/version.h>
-#include <linux/lustre_lite.h>
-#include <linux/lustre_ha.h>
-#include <linux/lustre_dlm.h>
+#include <lustre_ha.h>
+#include <lustre_dlm.h>
#include <linux/init.h>
#include <linux/fs.h>
-#include <linux/lprocfs_status.h>
+#include <linux/random.h>
+#include <lprocfs_status.h>
#include "llite_internal.h"
+#include "vvp_internal.h"
+
+static struct kmem_cache *ll_inode_cachep;
-struct super_block * ll_get_sb(struct file_system_type *fs_type,
- int flags, const char *devname, void * data)
+static struct inode *ll_alloc_inode(struct super_block *sb)
{
- /* calls back in fill super */
- return get_sb_nodev(fs_type, flags, data, ll_fill_super);
+ struct ll_inode_info *lli;
+ 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;
}
-struct super_block * lustre_get_sb(struct file_system_type *fs_type,
- int flags, const char *devname, void * data)
+static void ll_inode_destroy_callback(struct rcu_head *head)
{
- /* calls back in fill super */
- return get_sb_nodev(fs_type, flags, data, lustre_fill_super);
+ struct inode *inode = container_of(head, struct inode, i_rcu);
+ struct ll_inode_info *ptr = ll_i2info(inode);
+ llcrypt_free_inode(inode);
+ OBD_SLAB_FREE_PTR(ptr, ll_inode_cachep);
}
-static kmem_cache_t *ll_inode_cachep;
+static void ll_destroy_inode(struct inode *inode)
+{
+ call_rcu(&inode->i_rcu, ll_inode_destroy_callback);
+}
-static struct inode *ll_alloc_inode(struct super_block *sb)
+static int ll_drop_inode(struct inode *inode)
{
- struct ll_inode_info *lli;
- lprocfs_counter_incr((ll_s2sbi(sb))->ll_stats, LPROC_LL_ALLOC_INODE);
- OBD_SLAB_ALLOC(lli, ll_inode_cachep, SLAB_KERNEL, sizeof *lli);
- if (lli == NULL)
- return NULL;
+ struct ll_sb_info *sbi = ll_i2sbi(inode);
+ int drop;
+
+ if (!sbi->ll_inode_cache_enabled)
+ return 1;
- inode_init_once(&lli->lli_vfs_inode);
- ll_lli_init(lli);
+ drop = generic_drop_inode(inode);
+ if (!drop)
+ drop = llcrypt_drop_inode(inode);
- return &lli->lli_vfs_inode;
+ return drop;
}
-static void ll_destroy_inode(struct inode *inode)
+/* exported operations */
+const struct super_operations lustre_super_operations =
{
- struct ll_inode_info *ptr = ll_i2info(inode);
- OBD_SLAB_FREE(ptr, ll_inode_cachep, sizeof(*ptr));
-}
+ .alloc_inode = ll_alloc_inode,
+ .destroy_inode = ll_destroy_inode,
+ .drop_inode = ll_drop_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,
+};
-static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags)
+/**
+ * This is the entry point for the mount call into Lustre.
+ * This is called when a client is mounted, and this is
+ * where we start setting things up.
+ *
+ * @lmd2data data Mount options (e.g. -o flock,abort_recov)
+ */
+static int lustre_fill_super(struct super_block *sb, void *lmd2_data,
+ int silent)
{
- struct ll_inode_info *lli = foo;
+ struct lustre_mount_data *lmd;
+ struct lustre_sb_info *lsi;
+ int rc;
- if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
- SLAB_CTOR_CONSTRUCTOR)
- inode_init_once(&lli->lli_vfs_inode);
-}
+ ENTRY;
-int ll_init_inodecache(void)
-{
- ll_inode_cachep = kmem_cache_create("lustre_inode_cache",
- sizeof(struct ll_inode_info),
- 0, SLAB_HWCACHE_ALIGN,
- init_once, NULL);
- if (ll_inode_cachep == NULL)
- return -ENOMEM;
- return 0;
+ CDEBUG(D_MOUNT|D_VFSTRACE, "VFS Op: sb %p\n", sb);
+
+ lsi = lustre_init_lsi(sb);
+ if (!lsi)
+ RETURN(-ENOMEM);
+ lmd = lsi->lsi_lmd;
+
+ /*
+ * Disable lockdep during mount, because mount locking patterns are
+ * 'special'.
+ */
+ lockdep_off();
+
+ /*
+ * LU-639: the OBD cleanup of last mount may not finish yet, wait here.
+ */
+ obd_zombie_barrier();
+
+ /* Figure out the lmd from the mount options */
+ if (lmd_parse(lmd2_data, lmd)) {
+ lustre_put_lsi(sb);
+ GOTO(out, rc = -EINVAL);
+ }
+
+ if (!lmd_is_client(lmd)) {
+#ifdef HAVE_SERVER_SUPPORT
+#if LUSTRE_VERSION_CODE > OBD_OCD_VERSION(2, 15, 51, 0)
+ static bool printed;
+
+ if (!printed) {
+ LCONSOLE_WARN("%s: mounting server target with '-t lustre' deprecated, use '-t lustre_tgt'\n",
+ lmd->lmd_profile);
+ printed = true;
+ }
+#endif
+ rc = server_fill_super(sb);
+#else
+ rc = -ENODEV;
+ CERROR("%s: This is client-side-only module, cannot handle server mount: rc = %d\n",
+ lmd->lmd_profile, rc);
+ lustre_put_lsi(sb);
+#endif
+ GOTO(out, rc);
+ }
+
+ CDEBUG(D_MOUNT, "Mounting client %s\n", lmd->lmd_profile);
+ /* filename encryption is disabled by default */
+ lsi->lsi_flags &= ~LSI_FILENAME_ENC;
+ rc = lustre_start_mgc(sb);
+ if (rc) {
+ lustre_common_put_super(sb);
+ GOTO(out, rc);
+ }
+ /* Connect and start */
+ rc = ll_fill_super(sb);
+ /* ll_file_super will call lustre_common_put_super on failure,
+ * which takes care of the module reference.
+ *
+ * If error happens in fill_super() call, @lsi will be killed there.
+ * This is why we do not put it here.
+ */
+out:
+ if (rc) {
+ CERROR("llite: Unable to mount %s: rc = %d\n",
+ s2lsi(sb) ? lmd->lmd_dev : "<unknown>", rc);
+ } else {
+ CDEBUG(D_SUPER, "%s: Mount complete\n",
+ lmd->lmd_dev);
+ }
+ lockdep_on();
+ return rc;
}
-void ll_destroy_inodecache(void)
+/***************** FS registration ******************/
+static struct dentry *lustre_mount(struct file_system_type *fs_type, int flags,
+ const char *devname, void *data)
{
- if (kmem_cache_destroy(ll_inode_cachep))
- CERROR("ll_inode_cache: not all structures were freed\n");
+ return mount_nodev(fs_type, flags, data, lustre_fill_super);
}
-/* exported operations */
-struct super_operations lustre_super_operations =
+static void lustre_kill_super(struct super_block *sb)
{
- .alloc_inode = ll_alloc_inode,
- .destroy_inode = ll_destroy_inode,
- .clear_inode = ll_clear_inode,
- .put_super = lustre_put_super,
- .statfs = ll_statfs,
- .umount_begin = ll_umount_begin
-};
+ struct lustre_sb_info *lsi = s2lsi(sb);
+ if (lsi && !IS_SERVER(lsi))
+ ll_kill_super(sb);
-struct file_system_type lustre_lite_fs_type = {
- .owner = THIS_MODULE,
- .name = "lustre_lite",
- .get_sb = ll_get_sb,
- .kill_sb = kill_anon_super,
-};
+ kill_anon_super(sb);
+}
-struct file_system_type lustre_fs_type = {
- .owner = THIS_MODULE,
- .name = "lustre",
- .get_sb = lustre_get_sb,
- .kill_sb = kill_anon_super,
+/** Register the "lustre" fs type
+ */
+static struct file_system_type lustre_fs_type = {
+ .owner = THIS_MODULE,
+ .name = "lustre",
+ .mount = lustre_mount,
+ .kill_sb = lustre_kill_super,
+ .fs_flags = FS_RENAME_DOES_D_MOVE,
};
+MODULE_ALIAS_FS("lustre");
-static int __init init_lustre_lite(void)
+static int __init lustre_init(void)
{
- int rc;
- printk(KERN_INFO "Lustre: Lustre Lite Client File System; "
- "info@clusterfs.com\n");
- rc = ll_init_inodecache();
- if (rc)
- return -ENOMEM;
- ll_file_data_slab = kmem_cache_create("ll_file_data",
- sizeof(struct ll_file_data), 0,
- SLAB_HWCACHE_ALIGN, NULL, NULL);
- if (ll_file_data_slab == NULL) {
- ll_destroy_inodecache();
- return -ENOMEM;
- }
-
- proc_lustre_fs_root = proc_lustre_root ?
- proc_mkdir("llite", proc_lustre_root) : NULL;
-
- rc = register_filesystem(&lustre_lite_fs_type);
- if (!rc) {
- rc = register_filesystem(&lustre_fs_type);
- if (rc)
- unregister_filesystem(&lustre_fs_type);
- }
- return rc;
+ int rc;
+ unsigned long lustre_inode_cache_flags;
+
+ 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);
+
+ lustre_inode_cache_flags = SLAB_HWCACHE_ALIGN | SLAB_RECLAIM_ACCOUNT |
+ SLAB_MEM_SPREAD;
+#ifdef SLAB_ACCOUNT
+ lustre_inode_cache_flags |= SLAB_ACCOUNT;
+#endif
+
+ ll_inode_cachep = kmem_cache_create("lustre_inode_cache",
+ sizeof(struct ll_inode_info),
+ 0, lustre_inode_cache_flags, NULL);
+ if (ll_inode_cachep == NULL)
+ GOTO(out_cache, rc = -ENOMEM);
+
+ 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, rc = -ENOMEM);
+
+ pcc_inode_slab = kmem_cache_create("ll_pcc_inode",
+ sizeof(struct pcc_inode), 0,
+ SLAB_HWCACHE_ALIGN, NULL);
+ if (pcc_inode_slab == NULL)
+ GOTO(out_cache, rc = -ENOMEM);
+
+ rc = llite_tunables_register();
+ if (rc)
+ GOTO(out_cache, rc);
+
+ rc = vvp_global_init();
+ if (rc != 0)
+ GOTO(out_tunables, rc);
+
+ cl_inode_fini_env = cl_env_alloc(&cl_inode_fini_refcheck,
+ LCT_REMEMBER | LCT_NOREF);
+ if (IS_ERR(cl_inode_fini_env))
+ GOTO(out_vvp, rc = PTR_ERR(cl_inode_fini_env));
+
+ cl_inode_fini_env->le_ctx.lc_cookie = 0x4;
+
+ rc = ll_xattr_init();
+ if (rc != 0)
+ GOTO(out_inode_fini_env, rc);
+
+ rc = register_filesystem(&lustre_fs_type);
+ if (rc)
+ GOTO(out_xattr, rc);
+
+ RETURN(0);
+
+out_xattr:
+ ll_xattr_fini();
+out_inode_fini_env:
+ cl_env_put(cl_inode_fini_env, &cl_inode_fini_refcheck);
+out_vvp:
+ vvp_global_fini();
+out_tunables:
+ llite_tunables_unregister();
+out_cache:
+ kmem_cache_destroy(ll_inode_cachep);
+ kmem_cache_destroy(ll_file_data_slab);
+ kmem_cache_destroy(pcc_inode_slab);
+ return rc;
}
-static void __exit exit_lustre_lite(void)
+static void __exit lustre_exit(void)
{
- unregister_filesystem(&lustre_fs_type);
- unregister_filesystem(&lustre_lite_fs_type);
- ll_destroy_inodecache();
- kmem_cache_destroy(ll_file_data_slab);
- if (proc_lustre_fs_root) {
- lprocfs_remove(proc_lustre_fs_root);
- proc_lustre_fs_root = NULL;
- }
+ unregister_filesystem(&lustre_fs_type);
+
+ llite_tunables_unregister();
+
+ ll_xattr_fini();
+ cl_env_put(cl_inode_fini_env, &cl_inode_fini_refcheck);
+ vvp_global_fini();
+
+ /*
+ * Make sure all delayed rcu free inodes are flushed before we
+ * destroy cache.
+ */
+ rcu_barrier();
+
+ kmem_cache_destroy(ll_inode_cachep);
+ kmem_cache_destroy(ll_file_data_slab);
+ kmem_cache_destroy(pcc_inode_slab);
}
-MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
-MODULE_DESCRIPTION("Lustre Lite Client File System");
+MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
+MODULE_DESCRIPTION("Lustre Client File System");
+MODULE_VERSION(LUSTRE_VERSION_STRING);
MODULE_LICENSE("GPL");
-module_init(init_lustre_lite);
-module_exit(exit_lustre_lite);
+module_init(lustre_init);
+module_exit(lustre_exit);
git://git.whamcloud.com / fs / lustre-release.git / blobdiff