-/* -*- 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.
*
* 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.
+ * http://www.gnu.org/licenses/gpl-2.0.html
*
* GPL HEADER END
*/
/*
- * Copyright 2008 Sun Microsystems, Inc. All rights reserved
+ * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
+ *
+ * Copyright (c) 2011, 2016, 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
+#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 <lustre_lite.h>
#include <lustre_ha.h>
#include <lustre_dlm.h>
#include <linux/init.h>
#include <linux/fs.h>
+#include <linux/random.h>
#include <lprocfs_status.h>
#include "llite_internal.h"
+#include "vvp_internal.h"
-static cfs_mem_cache_t *ll_inode_cachep;
+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(lli, ll_inode_cachep);
- if (lli == NULL)
- return NULL;
-
- inode_init_once(&lli->lli_vfs_inode);
- ll_lli_init(lli);
+ struct ll_inode_info *lli;
+ OBD_SLAB_ALLOC_PTR_GFP(lli, ll_inode_cachep, GFP_NOFS);
+ if (lli == NULL)
+ return NULL;
- return &lli->lli_vfs_inode;
+ inode_init_once(&lli->lli_vfs_inode);
+ return &lli->lli_vfs_inode;
}
-static void ll_destroy_inode(struct inode *inode)
+static void ll_inode_destroy_callback(struct rcu_head *head)
{
- struct ll_inode_info *ptr = ll_i2info(inode);
- OBD_SLAB_FREE_PTR(ptr, ll_inode_cachep);
+ 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);
}
-int ll_init_inodecache(void)
+static void ll_destroy_inode(struct inode *inode)
{
- ll_inode_cachep = cfs_mem_cache_create("lustre_inode_cache",
- sizeof(struct ll_inode_info),
- 0, SLAB_HWCACHE_ALIGN);
- if (ll_inode_cachep == NULL)
- return -ENOMEM;
- return 0;
+ call_rcu(&inode->i_rcu, ll_inode_destroy_callback);
}
-void ll_destroy_inodecache(void)
+static int ll_drop_inode(struct inode *inode)
{
- int rc;
+ struct ll_sb_info *sbi = ll_i2sbi(inode);
+ int drop;
+
+ if (!sbi->ll_inode_cache_enabled)
+ return 1;
+
+ drop = generic_drop_inode(inode);
+ if (!drop)
+ drop = llcrypt_drop_inode(inode);
- rc = cfs_mem_cache_destroy(ll_inode_cachep);
- LASSERTF(rc == 0, "ll_inode_cache: not all structures were freed\n");
+ return drop;
}
/* exported operations */
-struct super_operations lustre_super_operations =
+const 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,
+ .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,
};
+/**
+ * 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 lustre_mount_data *lmd;
+ struct lustre_sb_info *lsi;
+ int rc;
+
+ ENTRY;
+
+ 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 lustre_register_client_process_config(int (*cpc)(struct lustre_cfg *lcfg));
-
-static int __init init_lustre_lite(void)
+/***************** FS registration ******************/
+static struct dentry *lustre_mount(struct file_system_type *fs_type, int flags,
+ const char *devname, void *data)
{
- int i, rc, seed[2];
- struct timeval tv;
- lnet_process_id_t lnet_id;
-
- 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,
- 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(struct list_head),
- 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;
-
- ll_register_cache(&ll_cache_definition);
-
- lustre_register_client_fill_super(ll_fill_super);
- lustre_register_kill_super_cb(ll_kill_super);
-
- lustre_register_client_process_config(ll_process_config);
-
- ll_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);
- ll_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();
- return rc;
+ return mount_nodev(fs_type, flags, data, lustre_fill_super);
}
-static void __exit exit_lustre_lite(void)
+static void lustre_kill_super(struct super_block *sb)
{
- int rc;
-
- 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]);
+ struct lustre_sb_info *lsi = s2lsi(sb);
+
+ if (lsi && !IS_SERVER(lsi))
+ ll_kill_super(sb);
- lustre_register_client_fill_super(NULL);
- lustre_register_kill_super_cb(NULL);
+ kill_anon_super(sb);
+}
- lustre_register_client_process_config(NULL);
+/** 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");
- ll_unregister_cache(&ll_cache_definition);
+static int __init lustre_init(void)
+{
+ 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;
+}
- ll_destroy_inodecache();
+static void __exit lustre_exit(void)
+{
+ unregister_filesystem(&lustre_fs_type);
- 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;
+ llite_tunables_unregister();
- 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;
+ ll_xattr_fini();
+ cl_env_put(cl_inode_fini_env, &cl_inode_fini_refcheck);
+ vvp_global_fini();
- rc = cfs_mem_cache_destroy(ll_file_data_slab);
- LASSERTF(rc == 0, "couldn't destroy ll_file_data slab\n");
- if (ll_async_page_slab) {
- rc = cfs_mem_cache_destroy(ll_async_page_slab);
- LASSERTF(rc == 0, "couldn't destroy ll_async_page slab\n");
- }
+ /*
+ * Make sure all delayed rcu free inodes are flushed before we
+ * destroy cache.
+ */
+ rcu_barrier();
- if (proc_lustre_fs_root)
- lprocfs_remove(&proc_lustre_fs_root);
+ kmem_cache_destroy(ll_inode_cachep);
+ kmem_cache_destroy(ll_file_data_slab);
+ kmem_cache_destroy(pcc_inode_slab);
}
-MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
-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