--- /dev/null
+/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
+ * vim:expandtab:shiftwidth=8:tabstop=8:
+ *
+ * Lustre Light Super operations
+ *
+ * This code is issued under the GNU General Public License.
+ * See the file COPYING in this distribution
+ *
+ * Copryright (C) 2002 Cluster File Systems, Inc.
+ */
+
+#define DEBUG_SUBSYSTEM S_LLITE
+
+#include <linux/module.h>
+#include <linux/random.h>
+#include <linux/version.h>
+#include <linux/lustre_lite.h>
+#include <linux/lustre_ha.h>
+#include <linux/obd_lov.h>
+#include <linux/lustre_dlm.h>
+#include <linux/init.h>
+#include <linux/fs.h>
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
+kmem_cache_t *ll_file_data_slab;
+extern struct address_space_operations ll_aops;
+extern struct address_space_operations ll_dir_aops;
+struct super_operations ll_super_operations;
+
+extern int ll_init_inodecache(void);
+extern void ll_destroy_inodecache(void);
+extern int ll_recover(struct recovd_data *, int);
+extern int ll_commitcbd_setup(struct ll_sb_info *);
+extern int ll_commitcbd_cleanup(struct ll_sb_info *);
+static int ll_read_inode2(struct inode *inode, void *opaque);
+
+static char *ll_read_opt(const char *opt, char *data)
+{
+ char *value;
+ char *retval;
+ ENTRY;
+
+ CDEBUG(D_SUPER, "option: %s, data %s\n", opt, data);
+ if ( strncmp(opt, data, strlen(opt)) )
+ RETURN(NULL);
+ if ( (value = strchr(data, '=')) == NULL )
+ RETURN(NULL);
+
+ value++;
+ OBD_ALLOC(retval, strlen(value) + 1);
+ if ( !retval ) {
+ CERROR("out of memory!\n");
+ RETURN(NULL);
+ }
+
+ memcpy(retval, value, strlen(value)+1);
+ CDEBUG(D_SUPER, "Assigned option: %s, value %s\n", opt, retval);
+ RETURN(retval);
+}
+
+static int ll_set_opt(const char *opt, char *data, int fl)
+{
+ ENTRY;
+
+ CDEBUG(D_SUPER, "option: %s, data %s\n", opt, data);
+ if ( strncmp(opt, data, strlen(opt)) )
+ RETURN(0);
+ else
+ RETURN(fl);
+}
+
+static void ll_options(char *options, char **ost, char **mds, int *flags)
+{
+ char *opt_ptr = options;
+ char *this_char;
+ ENTRY;
+
+ if (!options) {
+ EXIT;
+ return;
+ }
+
+ while ((this_char = strsep (&opt_ptr, ",")) != NULL) {
+ CDEBUG(D_SUPER, "this_char %s\n", this_char);
+ if ( (!*ost && (*ost = ll_read_opt("osc", this_char)))||
+ (!*mds && (*mds = ll_read_opt("mdc", this_char)))||
+ (!(*flags & LL_SBI_NOLCK) && ((*flags) = (*flags) |
+ ll_set_opt("nolock", this_char, LL_SBI_NOLCK))) )
+ continue;
+ }
+ EXIT;
+}
+
+#ifndef log2
+#define log2(n) ffz(~(n))
+#endif
+
+
+static int ll_fill_super(struct super_block *sb, void *data, int silent)
+{
+ struct inode *root = 0;
+ struct obd_device *obd;
+ struct ll_sb_info *sbi;
+ char *osc = NULL;
+ char *mdc = NULL;
+ int err;
+ struct ll_fid rootfid;
+ struct obd_statfs osfs;
+ __u64 last_committed;
+ __u64 last_xid;
+ struct ptlrpc_request *request = NULL;
+ struct ptlrpc_connection *mdc_conn;
+ struct ll_read_inode2_cookie lic;
+ class_uuid_t uuid;
+
+ ENTRY;
+ MOD_INC_USE_COUNT;
+
+ OBD_ALLOC(sbi, sizeof(*sbi));
+ if (!sbi) {
+ MOD_DEC_USE_COUNT;
+ RETURN(-ENOMEM);
+ }
+
+ INIT_LIST_HEAD(&sbi->ll_conn_chain);
+ sbi->ll_mount_epoch = 0;
+ generate_random_uuid(uuid);
+ class_uuid_unparse(uuid, sbi->ll_sb_uuid);
+
+ sb->u.generic_sbp = sbi;
+
+ ll_options(data, &osc, &mdc, &sbi->ll_flags);
+
+ if (!osc) {
+ CERROR("no osc\n");
+ GOTO(out_free, sb = NULL);
+ }
+
+ if (!mdc) {
+ CERROR("no mdc\n");
+ GOTO(out_free, sb = NULL);
+ }
+
+ obd = class_uuid2obd(mdc);
+ if (!obd) {
+ CERROR("MDC %s: not setup or attached\n", mdc);
+ GOTO(out_free, sb = NULL);
+ }
+
+ err = obd_connect(&sbi->ll_mdc_conn, obd, sbi->ll_sb_uuid,
+ ptlrpc_recovd, ll_recover);
+ if (err) {
+ CERROR("cannot connect to %s: rc = %d\n", mdc, err);
+ GOTO(out_free, sb = NULL);
+ }
+
+#warning Peter: is this the right place to raise the connection level?
+ mdc_conn = sbi2mdc(sbi)->cl_import.imp_connection;
+ mdc_conn->c_level = LUSTRE_CONN_FULL;
+ list_add(&mdc_conn->c_sb_chain, &sbi->ll_conn_chain);
+
+ obd = class_uuid2obd(osc);
+ if (!obd) {
+ CERROR("OSC %s: not setup or attached\n", osc);
+ GOTO(out_mdc, sb = NULL);
+ }
+
+ err = obd_connect(&sbi->ll_osc_conn, obd, sbi->ll_sb_uuid,
+ ptlrpc_recovd, ll_recover);
+ if (err) {
+ CERROR("cannot connect to %s: rc = %d\n", osc, err);
+ GOTO(out_mdc, sb = NULL);
+ }
+
+ /* XXX: need to store the last_* values somewhere */
+ err = mdc_getstatus(&sbi->ll_mdc_conn, &rootfid, &last_committed,
+ &last_xid, &request);
+ ptlrpc_req_finished(request);
+ if (err) {
+ CERROR("cannot mds_connect: rc = %d\n", err);
+ GOTO(out_mdc, sb = NULL);
+ }
+ CDEBUG(D_SUPER, "rootfid %Ld\n", (unsigned long long)rootfid.id);
+ sbi->ll_rootino = rootfid.id;
+
+ memset(&osfs, 0, sizeof(osfs));
+ request = NULL;
+ err = mdc_statfs(&sbi->ll_mdc_conn, &osfs, &request);
+ ptlrpc_req_finished(request);
+ sb->s_blocksize = osfs.os_bsize;
+ sb->s_blocksize_bits = log2(osfs.os_bsize);
+ sb->s_magic = LL_SUPER_MAGIC;
+ sb->s_maxbytes = (1ULL << (32 + 9)) - osfs.os_bsize;
+
+ sb->s_op = &ll_super_operations;
+
+ /* make root inode */
+ request = NULL;
+ err = mdc_getattr(&sbi->ll_mdc_conn, sbi->ll_rootino, S_IFDIR,
+ OBD_MD_FLNOTOBD|OBD_MD_FLBLOCKS, 0, &request);
+ if (err) {
+ CERROR("mdc_getattr failed for root: rc = %d\n", err);
+ GOTO(out_request, sb = NULL);
+ }
+
+ /* initialize committed transaction callback daemon */
+ spin_lock_init(&sbi->ll_commitcbd_lock);
+ init_waitqueue_head(&sbi->ll_commitcbd_waitq);
+ init_waitqueue_head(&sbi->ll_commitcbd_ctl_waitq);
+ sbi->ll_commitcbd_flags = 0;
+ err = ll_commitcbd_setup(sbi);
+ if (err) {
+ CERROR("failed to start commit callback daemon: rc = %d\n",err);
+ GOTO(out_request, sb = NULL);
+ }
+
+ lic.lic_body = lustre_msg_buf(request->rq_repmsg, 0);
+ lic.lic_lmm = NULL;
+ root = iget5_locked(sb, sbi->ll_rootino, NULL,
+ ll_read_inode2, &lic);
+
+ if (root) {
+ sb->s_root = d_alloc_root(root);
+ } else {
+ CERROR("lustre_lite: bad iget4 for root\n");
+ GOTO(out_cdb, sb = NULL);
+ }
+
+ ptlrpc_req_finished(request);
+
+out_dev:
+ if (mdc)
+ OBD_FREE(mdc, strlen(mdc) + 1);
+ if (osc)
+ OBD_FREE(osc, strlen(osc) + 1);
+
+ RETURN(0);
+
+out_cdb:
+ ll_commitcbd_cleanup(sbi);
+out_request:
+ ptlrpc_req_finished(request);
+ obd_disconnect(&sbi->ll_osc_conn);
+out_mdc:
+ obd_disconnect(&sbi->ll_mdc_conn);
+out_free:
+ OBD_FREE(sbi, sizeof(*sbi));
+
+ MOD_DEC_USE_COUNT;
+ goto out_dev;
+} /* ll_fill_super */
+
+struct super_block * ll_get_sb(struct file_system_type *fs_type,
+ int flags, char *devname, void * data)
+{
+ return get_sb_nodev(fs_type, flags, data, ll_fill_super);
+}
+
+static void ll_put_super(struct super_block *sb)
+{
+ struct ll_sb_info *sbi = ll_s2sbi(sb);
+
+ ENTRY;
+ list_del(&sbi->ll_conn_chain);
+ ll_commitcbd_cleanup(sbi);
+ obd_disconnect(&sbi->ll_osc_conn);
+ obd_disconnect(&sbi->ll_mdc_conn);
+ OBD_FREE(sbi, sizeof(*sbi));
+
+ MOD_DEC_USE_COUNT;
+ EXIT;
+} /* ll_put_super */
+
+static void ll_clear_inode(struct inode *inode)
+{
+ ENTRY;
+
+ if (atomic_read(&inode->i_count) == 0) {
+ struct ll_inode_info *lli = ll_i2info(inode);
+ struct lov_stripe_md *lsm = lli->lli_smd;
+ char *symlink_name = lli->lli_symlink_name;
+
+ if (lsm) {
+ OBD_FREE(lsm, ll_ost_easize(inode->i_sb));
+ lli->lli_smd = NULL;
+ }
+ if (symlink_name) {
+ OBD_FREE(symlink_name, strlen(symlink_name) + 1);
+ lli->lli_symlink_name = NULL;
+ }
+ }
+ EXIT;
+}
+
+static void ll_delete_inode(struct inode *inode)
+{
+ ENTRY;
+ if (S_ISREG(inode->i_mode)) {
+ int err;
+ struct obdo *oa;
+ struct lov_stripe_md *lsm = ll_i2info(inode)->lli_smd;
+
+ if (!lsm)
+ GOTO(out, -EINVAL);
+
+ if (lsm->lsm_object_id == 0) {
+ CERROR("This really happens\n");
+ /* No obdo was ever created */
+ GOTO(out, 0);
+ }
+
+ oa = obdo_alloc();
+ if (oa == NULL)
+ GOTO(out, -ENOMEM);
+
+ oa->o_id = lsm->lsm_object_id;
+ oa->o_easize = ll_mds_easize(inode->i_sb);
+ oa->o_mode = inode->i_mode;
+ oa->o_valid = OBD_MD_FLID | OBD_MD_FLEASIZE | OBD_MD_FLTYPE;
+
+ err = obd_destroy(ll_i2obdconn(inode), oa, lsm);
+ obdo_free(oa);
+ CDEBUG(D_SUPER, "obd destroy of objid "LPX64" error %d\n",
+ lsm->lsm_object_id, err);
+ }
+out:
+ clear_inode(inode);
+ EXIT;
+}
+
+/* like inode_setattr, but doesn't mark the inode dirty */
+static int ll_attr2inode(struct inode * inode, struct iattr * attr, int trunc)
+{
+ unsigned int ia_valid = attr->ia_valid;
+ int error = 0;
+
+ if ((ia_valid & ATTR_SIZE) && trunc) {
+ error = vmtruncate(inode, attr->ia_size);
+ if (error)
+ goto out;
+ } else if (ia_valid & ATTR_SIZE)
+ inode->i_size = attr->ia_size;
+
+ if (ia_valid & ATTR_UID)
+ inode->i_uid = attr->ia_uid;
+ if (ia_valid & ATTR_GID)
+ inode->i_gid = attr->ia_gid;
+ if (ia_valid & ATTR_ATIME)
+ inode->i_atime = attr->ia_atime;
+ if (ia_valid & ATTR_MTIME)
+ inode->i_mtime = attr->ia_mtime;
+ if (ia_valid & ATTR_CTIME)
+ inode->i_ctime = attr->ia_ctime;
+ if (ia_valid & ATTR_MODE) {
+ inode->i_mode = attr->ia_mode;
+ if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID))
+ inode->i_mode &= ~S_ISGID;
+ }
+out:
+ return error;
+}
+
+int ll_inode_setattr(struct inode *inode, struct iattr *attr, int do_trunc)
+{
+ struct ptlrpc_request *request = NULL;
+ struct ll_sb_info *sbi = ll_i2sbi(inode);
+ int err;
+
+ ENTRY;
+
+ /* change incore inode */
+ ll_attr2inode(inode, attr, do_trunc);
+
+ err = mdc_setattr(&sbi->ll_mdc_conn, inode, attr, &request);
+ if (err)
+ CERROR("mdc_setattr fails (%d)\n", err);
+
+ ptlrpc_req_finished(request);
+
+ RETURN(err);
+}
+
+int ll_setattr(struct dentry *de, struct iattr *attr)
+{
+ int rc = inode_change_ok(de->d_inode, attr);
+
+ if (rc)
+ return rc;
+
+ return ll_inode_setattr(de->d_inode, attr, 1);
+}
+
+static int ll_statfs(struct super_block *sb, struct statfs *sfs)
+{
+ struct ptlrpc_request *request = NULL;
+ struct ll_sb_info *sbi = ll_s2sbi(sb);
+ struct obd_statfs osfs;
+ int rc;
+ ENTRY;
+
+ memset(sfs, 0, sizeof(*sfs));
+ rc = mdc_statfs(&sbi->ll_mdc_conn, &osfs, &request);
+ statfs_unpack(sfs, &osfs);
+ ptlrpc_req_finished(request);
+ if (rc)
+ CERROR("mdc_statfs fails: rc = %d\n", rc);
+ else
+ CDEBUG(D_SUPER, "mdc_statfs shows blocks "LPU64"/"LPU64
+ " objects "LPU64"/"LPU64"\n",
+ osfs.os_bavail, osfs.os_blocks,
+ osfs.os_ffree, osfs.os_files);
+
+ /* temporary until mds_statfs returns statfs info for all OSTs */
+ if (!rc) {
+ rc = obd_statfs(&sbi->ll_osc_conn, &osfs);
+ if (rc) {
+ CERROR("obd_statfs fails: rc = %d\n", rc);
+ GOTO(out, rc);
+ }
+ CDEBUG(D_SUPER, "obd_statfs shows blocks "LPU64"/"LPU64
+ " objects "LPU64"/"LPU64"\n",
+ osfs.os_bavail, osfs.os_blocks,
+ osfs.os_ffree, osfs.os_files);
+
+ while (osfs.os_blocks > ~0UL) {
+ sfs->f_bsize <<= 1;
+
+ osfs.os_blocks >>= 1;
+ osfs.os_bfree >>= 1;
+ osfs.os_bavail >>= 1;
+ }
+ sfs->f_blocks = osfs.os_blocks;
+ sfs->f_bfree = osfs.os_bfree;
+ sfs->f_bavail = osfs.os_bavail;
+ if (osfs.os_ffree < (__u64)sfs->f_ffree)
+ sfs->f_ffree = osfs.os_ffree;
+ }
+
+out:
+ RETURN(rc);
+}
+
+void ll_update_inode(struct inode *inode, struct mds_body *body)
+{
+ if (body->valid & OBD_MD_FLID)
+ inode->i_ino = body->ino;
+ if (body->valid & OBD_MD_FLATIME)
+ inode->i_atime = body->atime;
+ if (body->valid & OBD_MD_FLMTIME)
+ inode->i_mtime = body->mtime;
+ if (body->valid & OBD_MD_FLCTIME)
+ inode->i_ctime = body->ctime;
+ if (body->valid & OBD_MD_FLMODE)
+ inode->i_mode = (inode->i_mode & S_IFMT)|(body->mode & ~S_IFMT);
+ if (body->valid & OBD_MD_FLTYPE)
+ inode->i_mode = (inode->i_mode & ~S_IFMT)|(body->mode & S_IFMT);
+ if (body->valid & OBD_MD_FLUID)
+ inode->i_uid = body->uid;
+ if (body->valid & OBD_MD_FLGID)
+ inode->i_gid = body->gid;
+ if (body->valid & OBD_MD_FLFLAGS)
+ inode->i_flags = body->flags;
+ if (body->valid & OBD_MD_FLNLINK)
+ inode->i_nlink = body->nlink;
+ if (body->valid & OBD_MD_FLGENER)
+ inode->i_generation = body->generation;
+ if (body->valid & OBD_MD_FLRDEV)
+ inode->i_rdev = to_kdev_t(body->rdev);
+ if (body->valid & OBD_MD_FLSIZE)
+ inode->i_size = body->size;
+}
+
+static int ll_read_inode2(struct inode *inode, void *opaque)
+{
+ struct ll_read_inode2_cookie *lic = opaque;
+ struct mds_body *body = lic->lic_body;
+ struct ll_inode_info *lli = ll_i2info(inode);
+ ENTRY;
+
+ sema_init(&lli->lli_open_sem, 1);
+ lli->lli_mount_epoch = ll_i2sbi(inode)->ll_mount_epoch;
+
+ /* core attributes first */
+ ll_update_inode(inode, body);
+
+ //if (body->valid & OBD_MD_FLEASIZE)
+ if (lic && lic->lic_lmm) {
+ struct lov_mds_md *lmm = lic->lic_lmm;
+ int size;
+
+ if (lmm->lmm_easize != ll_mds_easize(inode->i_sb)) {
+ CERROR("Striping metadata size error %ld\n",
+ inode->i_ino);
+ LBUG();
+ }
+ size = ll_ost_easize(inode->i_sb);
+ OBD_ALLOC(lli->lli_smd, size);
+ if (!lli->lli_smd) {
+ CERROR("No memory for %d\n", size);
+ LBUG();
+ }
+ lov_unpackmd(lli->lli_smd, lmm);
+ } else {
+ lli->lli_smd = NULL;
+ }
+
+ /* Get the authoritative file size */
+ if (lli->lli_smd && (inode->i_mode & S_IFREG)) {
+ int rc;
+
+ rc = ll_file_size(inode, lli->lli_smd);
+ if (rc) {
+ CERROR("ll_file_size: %d\n", rc);
+ /* FIXME: need to somehow prevent inode creation */
+ LBUG();
+ }
+ }
+
+ /* OIDEBUG(inode); */
+
+ if (S_ISREG(inode->i_mode)) {
+ inode->i_op = &ll_file_inode_operations;
+ inode->i_fop = &ll_file_operations;
+ inode->i_mapping->a_ops = &ll_aops;
+ EXIT;
+ } else if (S_ISDIR(inode->i_mode)) {
+ inode->i_op = &ll_dir_inode_operations;
+ inode->i_fop = &ll_dir_operations;
+ inode->i_mapping->a_ops = &ll_dir_aops;
+ EXIT;
+ } else if (S_ISLNK(inode->i_mode)) {
+ inode->i_op = &ll_fast_symlink_inode_operations;
+ EXIT;
+ } else {
+ init_special_inode(inode, inode->i_mode,
+ kdev_t_to_nr(inode->i_rdev));
+ EXIT;
+ }
+ return 0;
+}
+
+static inline void invalidate_request_list(struct list_head *req_list)
+{
+ struct list_head *tmp, *n;
+ list_for_each_safe(tmp, n, req_list) {
+ struct ptlrpc_request *req =
+ list_entry(tmp, struct ptlrpc_request, rq_list);
+ CERROR("invalidating req xid %d op %d to %s:%d\n",
+ (unsigned long long)req->rq_xid, req->rq_reqmsg->opc,
+ req->rq_connection->c_remote_uuid,
+ req->rq_import->imp_client->cli_request_portal);
+ req->rq_flags |= PTL_RPC_FL_ERR;
+ wake_up(&req->rq_wait_for_rep);
+ }
+}
+
+void ll_umount_begin(struct super_block *sb)
+{
+ struct ll_sb_info *sbi = ll_s2sbi(sb);
+ struct list_head *ctmp;
+
+ ENTRY;
+
+ list_for_each(ctmp, &sbi->ll_conn_chain) {
+ struct ptlrpc_connection *conn;
+ conn = list_entry(ctmp, struct ptlrpc_connection, c_sb_chain);
+
+ spin_lock(&conn->c_lock);
+ conn->c_flags |= CONN_INVALID;
+ invalidate_request_list(&conn->c_sending_head);
+ invalidate_request_list(&conn->c_delayed_head);
+ spin_unlock(&conn->c_lock);
+ }
+
+ EXIT;
+}
+
+
+static kmem_cache_t *ll_inode_cachep;
+
+static struct inode *ll_alloc_inode(struct super_block *sb)
+{
+ struct ll_inode_info *lli;
+ lli = kmem_cache_alloc(ll_inode_cachep, SLAB_KERNEL);
+ if (!lli)
+ return NULL;
+
+ memset(lli, 0, sizeof(*lli));
+ sema_init(&lli->lli_open_sem, 1);
+ lli->lli_mount_epoch = ll_i2sbi(&lli->lli_vfs_inode)->ll_mount_epoch;
+
+ return &lli->lli_vfs_inode;
+}
+
+static void ll_destroy_inode(struct inode *inode)
+{
+ kmem_cache_free(ll_inode_cachep, LL_I(inode));
+}
+
+static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags)
+{
+ struct ll_inode_info *lli = foo;
+
+ if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
+ SLAB_CTOR_CONSTRUCTOR)
+ inode_init_once(&lli->lli_vfs_inode);
+}
+
+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;
+}
+
+void ll_destroy_inodecache(void)
+{
+ if (kmem_cache_destroy(ll_inode_cachep))
+ CERROR("ll_inode_cache: not all structures were freed\n");
+}
+
+
+
+/* exported operations */
+struct super_operations ll_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
+};
+
+struct file_system_type lustre_lite_fs_type = {
+ .owner = THIS_MODULE,
+ .name = "lustre_lite",
+ .get_sb = ll_get_sb,
+ .kill_sb = kill_litter_super,
+};
+
+static int __init init_lustre_lite(void)
+{
+ int rc;
+ printk(KERN_INFO "Lustre Lite 0.5.14, 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;
+ }
+ return register_filesystem(&lustre_lite_fs_type);
+}
+
+static void __exit exit_lustre_lite(void)
+{
+ unregister_filesystem(&lustre_lite_fs_type);
+ ll_destroy_inodecache();
+ kmem_cache_destroy(ll_file_data_slab);
+}
+
+MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
+MODULE_DESCRIPTION("Lustre Lite Client File System v1.0");
+MODULE_LICENSE("GPL");
+
+module_init(init_lustre_lite);
+module_exit(exit_lustre_lite);
+#endif