/* -*- 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 2008 Sun Microsystems, Inc. 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. * * lustre/mdd/mdd_device.c * * Lustre Metadata Server (mdd) routines * * Author: Wang Di */ #ifndef EXPORT_SYMTAB # define EXPORT_SYMTAB #endif #define DEBUG_SUBSYSTEM S_MDS #include #ifdef HAVE_EXT4_LDISKFS #include #else #include #endif #include #include #include #include #include #include #include #ifdef HAVE_EXT4_LDISKFS #include #else #include #endif #include #include #include /* for changelogs */ #include #include #include "mdd_internal.h" const struct md_device_operations mdd_ops; static struct lu_device_type mdd_device_type; static const char mdd_root_dir_name[] = "ROOT"; static const char mdd_obf_dir_name[] = "fid"; static int mdd_device_init(const struct lu_env *env, struct lu_device *d, const char *name, struct lu_device *next) { struct mdd_device *mdd = lu2mdd_dev(d); int rc; ENTRY; mdd->mdd_child = lu2dt_dev(next); /* Prepare transactions callbacks. */ mdd->mdd_txn_cb.dtc_txn_start = mdd_txn_start_cb; mdd->mdd_txn_cb.dtc_txn_stop = mdd_txn_stop_cb; mdd->mdd_txn_cb.dtc_txn_commit = mdd_txn_commit_cb; mdd->mdd_txn_cb.dtc_cookie = mdd; mdd->mdd_txn_cb.dtc_tag = LCT_MD_THREAD; CFS_INIT_LIST_HEAD(&mdd->mdd_txn_cb.dtc_linkage); mdd->mdd_atime_diff = MAX_ATIME_DIFF; /* sync permission changes */ mdd->mdd_sync_permission = 1; rc = mdd_procfs_init(mdd, name); RETURN(rc); } static struct lu_device *mdd_device_fini(const struct lu_env *env, struct lu_device *d) { struct mdd_device *mdd = lu2mdd_dev(d); struct lu_device *next = &mdd->mdd_child->dd_lu_dev; int rc; rc = mdd_procfs_fini(mdd); if (rc) { CERROR("proc fini error %d \n", rc); return ERR_PTR(rc); } return next; } static void mdd_changelog_fini(const struct lu_env *env, struct mdd_device *mdd); static void mdd_device_shutdown(const struct lu_env *env, struct mdd_device *m, struct lustre_cfg *cfg) { ENTRY; mdd_changelog_fini(env, m); dt_txn_callback_del(m->mdd_child, &m->mdd_txn_cb); if (m->mdd_dot_lustre_objs.mdd_obf) mdd_object_put(env, m->mdd_dot_lustre_objs.mdd_obf); if (m->mdd_dot_lustre) mdd_object_put(env, m->mdd_dot_lustre); if (m->mdd_obd_dev) mdd_fini_obd(env, m, cfg); orph_index_fini(env, m); /* remove upcall device*/ md_upcall_fini(&m->mdd_md_dev); EXIT; } static int changelog_init_cb(struct llog_handle *llh, struct llog_rec_hdr *hdr, void *data) { struct mdd_device *mdd = (struct mdd_device *)data; struct llog_changelog_rec *rec = (struct llog_changelog_rec *)hdr; ENTRY; LASSERT(llh->lgh_hdr->llh_flags & LLOG_F_IS_PLAIN); LASSERT(rec->cr_hdr.lrh_type == CHANGELOG_REC); CDEBUG(D_INFO, "seeing record at index %d/%d/"LPU64" t=%x %.*s in log "LPX64"\n", hdr->lrh_index, rec->cr_hdr.lrh_index, rec->cr.cr_index, rec->cr.cr_type, rec->cr.cr_namelen, rec->cr.cr_name, llh->lgh_id.lgl_oid); mdd->mdd_cl.mc_index = rec->cr.cr_index; RETURN(LLOG_PROC_BREAK); } static int changelog_user_init_cb(struct llog_handle *llh, struct llog_rec_hdr *hdr, void *data) { struct mdd_device *mdd = (struct mdd_device *)data; struct llog_changelog_user_rec *rec = (struct llog_changelog_user_rec *)hdr; ENTRY; LASSERT(llh->lgh_hdr->llh_flags & LLOG_F_IS_PLAIN); LASSERT(rec->cur_hdr.lrh_type == CHANGELOG_USER_REC); CDEBUG(D_INFO, "seeing user at index %d/%d id=%d endrec="LPU64 " in log "LPX64"\n", hdr->lrh_index, rec->cur_hdr.lrh_index, rec->cur_id, rec->cur_endrec, llh->lgh_id.lgl_oid); cfs_spin_lock(&mdd->mdd_cl.mc_user_lock); mdd->mdd_cl.mc_lastuser = rec->cur_id; cfs_spin_unlock(&mdd->mdd_cl.mc_user_lock); RETURN(LLOG_PROC_BREAK); } static int mdd_changelog_llog_init(struct mdd_device *mdd) { struct obd_device *obd = mdd2obd_dev(mdd); struct llog_ctxt *ctxt; int rc; /* Find last changelog entry number */ ctxt = llog_get_context(obd, LLOG_CHANGELOG_ORIG_CTXT); if (ctxt == NULL) { CERROR("no changelog context\n"); return -EINVAL; } if (!ctxt->loc_handle) { llog_ctxt_put(ctxt); return -EINVAL; } rc = llog_cat_reverse_process(ctxt->loc_handle, changelog_init_cb, mdd); llog_ctxt_put(ctxt); if (rc < 0) { CERROR("changelog init failed: %d\n", rc); return rc; } CDEBUG(D_IOCTL, "changelog starting index="LPU64"\n", mdd->mdd_cl.mc_index); /* Find last changelog user id */ ctxt = llog_get_context(obd, LLOG_CHANGELOG_USER_ORIG_CTXT); if (ctxt == NULL) { CERROR("no changelog user context\n"); return -EINVAL; } if (!ctxt->loc_handle) { llog_ctxt_put(ctxt); return -EINVAL; } rc = llog_cat_reverse_process(ctxt->loc_handle, changelog_user_init_cb, mdd); llog_ctxt_put(ctxt); if (rc < 0) { CERROR("changelog user init failed: %d\n", rc); return rc; } /* If we have registered users, assume we want changelogs on */ if (mdd->mdd_cl.mc_lastuser > 0) rc = mdd_changelog_on(mdd, 1); return rc; } static int mdd_changelog_init(const struct lu_env *env, struct mdd_device *mdd) { int rc; mdd->mdd_cl.mc_index = 0; cfs_spin_lock_init(&mdd->mdd_cl.mc_lock); cfs_waitq_init(&mdd->mdd_cl.mc_waitq); mdd->mdd_cl.mc_starttime = cfs_time_current_64(); mdd->mdd_cl.mc_flags = 0; /* off by default */ mdd->mdd_cl.mc_mask = CHANGELOG_DEFMASK; cfs_spin_lock_init(&mdd->mdd_cl.mc_user_lock); mdd->mdd_cl.mc_lastuser = 0; rc = mdd_changelog_llog_init(mdd); if (rc) { CERROR("Changelog setup during init failed %d\n", rc); mdd->mdd_cl.mc_flags |= CLM_ERR; } return rc; } static void mdd_changelog_fini(const struct lu_env *env, struct mdd_device *mdd) { mdd->mdd_cl.mc_flags = 0; } /* Start / stop recording */ int mdd_changelog_on(struct mdd_device *mdd, int on) { int rc = 0; if ((on == 1) && ((mdd->mdd_cl.mc_flags & CLM_ON) == 0)) { LCONSOLE_INFO("%s: changelog on\n", mdd2obd_dev(mdd)->obd_name); if (mdd->mdd_cl.mc_flags & CLM_ERR) { CERROR("Changelogs cannot be enabled due to error " "condition (see %s log).\n", mdd2obd_dev(mdd)->obd_name); rc = -ESRCH; } else { cfs_spin_lock(&mdd->mdd_cl.mc_lock); mdd->mdd_cl.mc_flags |= CLM_ON; cfs_spin_unlock(&mdd->mdd_cl.mc_lock); rc = mdd_changelog_write_header(mdd, CLM_START); } } else if ((on == 0) && ((mdd->mdd_cl.mc_flags & CLM_ON) == CLM_ON)) { LCONSOLE_INFO("%s: changelog off\n",mdd2obd_dev(mdd)->obd_name); rc = mdd_changelog_write_header(mdd, CLM_FINI); cfs_spin_lock(&mdd->mdd_cl.mc_lock); mdd->mdd_cl.mc_flags &= ~CLM_ON; cfs_spin_unlock(&mdd->mdd_cl.mc_lock); } return rc; } static __u64 cl_time(void) { cfs_fs_time_t time; cfs_fs_time_current(&time); return (((__u64)time.tv_sec) << 30) + time.tv_nsec; } /** Add a changelog entry \a rec to the changelog llog * \param mdd * \param rec * \param handle - currently ignored since llogs start their own transaction; * this will hopefully be fixed in llog rewrite * \retval 0 ok */ int mdd_changelog_llog_write(struct mdd_device *mdd, struct llog_changelog_rec *rec, struct thandle *handle) { struct obd_device *obd = mdd2obd_dev(mdd); struct llog_ctxt *ctxt; int rc; if ((mdd->mdd_cl.mc_mask & (1 << rec->cr.cr_type)) == 0) return 0; rec->cr_hdr.lrh_len = llog_data_len(sizeof(*rec) + rec->cr.cr_namelen); /* llog_lvfs_write_rec sets the llog tail len */ rec->cr_hdr.lrh_type = CHANGELOG_REC; rec->cr.cr_time = cl_time(); cfs_spin_lock(&mdd->mdd_cl.mc_lock); /* NB: I suppose it's possible llog_add adds out of order wrt cr_index, but as long as the MDD transactions are ordered correctly for e.g. rename conflicts, I don't think this should matter. */ rec->cr.cr_index = ++mdd->mdd_cl.mc_index; cfs_spin_unlock(&mdd->mdd_cl.mc_lock); ctxt = llog_get_context(obd, LLOG_CHANGELOG_ORIG_CTXT); if (ctxt == NULL) return -ENXIO; /* nested journal transaction */ rc = llog_add(ctxt, &rec->cr_hdr, NULL, NULL, 0); llog_ctxt_put(ctxt); cfs_waitq_signal(&mdd->mdd_cl.mc_waitq); return rc; } /** Remove entries with indicies up to and including \a endrec from the * changelog * \param mdd * \param endrec * \retval 0 ok */ int mdd_changelog_llog_cancel(struct mdd_device *mdd, long long endrec) { struct obd_device *obd = mdd2obd_dev(mdd); struct llog_ctxt *ctxt; long long unsigned cur; int rc; ctxt = llog_get_context(obd, LLOG_CHANGELOG_ORIG_CTXT); if (ctxt == NULL) return -ENXIO; cfs_spin_lock(&mdd->mdd_cl.mc_lock); cur = (long long)mdd->mdd_cl.mc_index; cfs_spin_unlock(&mdd->mdd_cl.mc_lock); if (endrec > cur) endrec = cur; /* purge to "0" is shorthand for everything */ if (endrec == 0) endrec = cur; /* If purging all records, write a header entry so we don't have an empty catalog and we're sure to have a valid starting index next time. In case of crash, we just restart with old log so we're allright. */ if (endrec == cur) { rc = mdd_changelog_write_header(mdd, CLM_PURGE); if (rc) goto out; } /* Some records were purged, so reset repeat-access time (so we record new mtime update records, so users can see a file has been changed since the last purge) */ mdd->mdd_cl.mc_starttime = cfs_time_current_64(); rc = llog_cancel(ctxt, NULL, 1, (struct llog_cookie *)&endrec, 0); out: llog_ctxt_put(ctxt); return rc; } /** Add a CL_MARK record to the changelog * \param mdd * \param markerflags - CLM_* * \retval 0 ok */ int mdd_changelog_write_header(struct mdd_device *mdd, int markerflags) { struct obd_device *obd = mdd2obd_dev(mdd); struct llog_changelog_rec *rec; int reclen; int len = strlen(obd->obd_name); int rc; ENTRY; reclen = llog_data_len(sizeof(*rec) + len); OBD_ALLOC(rec, reclen); if (rec == NULL) RETURN(-ENOMEM); rec->cr.cr_flags = CLF_VERSION; rec->cr.cr_type = CL_MARK; rec->cr.cr_namelen = len; memcpy(rec->cr.cr_name, obd->obd_name, rec->cr.cr_namelen); /* Status and action flags */ rec->cr.cr_markerflags = mdd->mdd_cl.mc_flags | markerflags; rc = mdd_changelog_llog_write(mdd, rec, NULL); /* assume on or off event; reset repeat-access time */ mdd->mdd_cl.mc_starttime = cfs_time_current_64(); OBD_FREE(rec, reclen); RETURN(rc); } /** * Create ".lustre" directory. */ static int create_dot_lustre_dir(const struct lu_env *env, struct mdd_device *m) { struct lu_fid *fid = &mdd_env_info(env)->mti_fid; struct md_object *mdo; int rc; memcpy(fid, &LU_DOT_LUSTRE_FID, sizeof(struct lu_fid)); mdo = llo_store_create_index(env, &m->mdd_md_dev, m->mdd_child, mdd_root_dir_name, dot_lustre_name, fid, &dt_directory_features); /* .lustre dir may be already present */ if (IS_ERR(mdo) && PTR_ERR(mdo) != -EEXIST) { rc = PTR_ERR(mdo); CERROR("creating obj [%s] fid = "DFID" rc = %d\n", dot_lustre_name, PFID(fid), rc); RETURN(rc); } if (!IS_ERR(mdo)) lu_object_put(env, &mdo->mo_lu); return 0; } static int dot_lustre_mdd_permission(const struct lu_env *env, struct md_object *pobj, struct md_object *cobj, struct md_attr *attr, int mask) { if (mask & ~(MAY_READ | MAY_EXEC)) return -EPERM; else return 0; } static int dot_lustre_mdd_attr_get(const struct lu_env *env, struct md_object *obj, struct md_attr *ma) { struct mdd_object *mdd_obj = md2mdd_obj(obj); return mdd_attr_get_internal_locked(env, mdd_obj, ma); } static int dot_lustre_mdd_attr_set(const struct lu_env *env, struct md_object *obj, const struct md_attr *ma) { return -EPERM; } static int dot_lustre_mdd_xattr_get(const struct lu_env *env, struct md_object *obj, struct lu_buf *buf, const char *name) { return 0; } static int dot_lustre_mdd_xattr_list(const struct lu_env *env, struct md_object *obj, struct lu_buf *buf) { return 0; } static int dot_lustre_mdd_xattr_set(const struct lu_env *env, struct md_object *obj, const struct lu_buf *buf, const char *name, int fl) { return -EPERM; } static int dot_lustre_mdd_xattr_del(const struct lu_env *env, struct md_object *obj, const char *name) { return -EPERM; } static int dot_lustre_mdd_readlink(const struct lu_env *env, struct md_object *obj, struct lu_buf *buf) { return 0; } static int dot_lustre_mdd_object_create(const struct lu_env *env, struct md_object *obj, const struct md_op_spec *spec, struct md_attr *ma) { return -EPERM; } static int dot_lustre_mdd_ref_add(const struct lu_env *env, struct md_object *obj, const struct md_attr *ma) { return -EPERM; } static int dot_lustre_mdd_ref_del(const struct lu_env *env, struct md_object *obj, struct md_attr *ma) { return -EPERM; } static int dot_lustre_mdd_open(const struct lu_env *env, struct md_object *obj, int flags) { struct mdd_object *mdd_obj = md2mdd_obj(obj); mdd_write_lock(env, mdd_obj, MOR_TGT_CHILD); mdd_obj->mod_count++; mdd_write_unlock(env, mdd_obj); return 0; } static int dot_lustre_mdd_close(const struct lu_env *env, struct md_object *obj, struct md_attr *ma) { struct mdd_object *mdd_obj = md2mdd_obj(obj); mdd_write_lock(env, mdd_obj, MOR_TGT_CHILD); mdd_obj->mod_count--; mdd_write_unlock(env, mdd_obj); return 0; } static int dot_lustre_mdd_object_sync(const struct lu_env *env, struct md_object *obj) { return -ENOSYS; } static dt_obj_version_t dot_lustre_mdd_version_get(const struct lu_env *env, struct md_object *obj) { return 0; } static void dot_lustre_mdd_version_set(const struct lu_env *env, struct md_object *obj, dt_obj_version_t version) { return; } static int dot_lustre_mdd_path(const struct lu_env *env, struct md_object *obj, char *path, int pathlen, __u64 *recno, int *linkno) { return -ENOSYS; } static struct md_object_operations mdd_dot_lustre_obj_ops = { .moo_permission = dot_lustre_mdd_permission, .moo_attr_get = dot_lustre_mdd_attr_get, .moo_attr_set = dot_lustre_mdd_attr_set, .moo_xattr_get = dot_lustre_mdd_xattr_get, .moo_xattr_list = dot_lustre_mdd_xattr_list, .moo_xattr_set = dot_lustre_mdd_xattr_set, .moo_xattr_del = dot_lustre_mdd_xattr_del, .moo_readpage = mdd_readpage, .moo_readlink = dot_lustre_mdd_readlink, .moo_object_create = dot_lustre_mdd_object_create, .moo_ref_add = dot_lustre_mdd_ref_add, .moo_ref_del = dot_lustre_mdd_ref_del, .moo_open = dot_lustre_mdd_open, .moo_close = dot_lustre_mdd_close, .moo_capa_get = mdd_capa_get, .moo_object_sync = dot_lustre_mdd_object_sync, .moo_version_get = dot_lustre_mdd_version_get, .moo_version_set = dot_lustre_mdd_version_set, .moo_path = dot_lustre_mdd_path, }; static int dot_lustre_mdd_lookup(const struct lu_env *env, struct md_object *p, const struct lu_name *lname, struct lu_fid *f, struct md_op_spec *spec) { if (strcmp(lname->ln_name, mdd_obf_dir_name) == 0) *f = LU_OBF_FID; else return -ENOENT; return 0; } static mdl_mode_t dot_lustre_mdd_lock_mode(const struct lu_env *env, struct md_object *obj, mdl_mode_t mode) { return MDL_MINMODE; } static int dot_lustre_mdd_create(const struct lu_env *env, struct md_object *pobj, const struct lu_name *lname, struct md_object *child, struct md_op_spec *spec, struct md_attr* ma) { return -EPERM; } static int dot_lustre_mdd_create_data(const struct lu_env *env, struct md_object *p, struct md_object *o, const struct md_op_spec *spec, struct md_attr *ma) { return -EPERM; } static int dot_lustre_mdd_rename(const struct lu_env *env, struct md_object *src_pobj, struct md_object *tgt_pobj, const struct lu_fid *lf, const struct lu_name *lsname, struct md_object *tobj, const struct lu_name *ltname, struct md_attr *ma) { return -EPERM; } static int dot_lustre_mdd_link(const struct lu_env *env, struct md_object *tgt_obj, struct md_object *src_obj, const struct lu_name *lname, struct md_attr *ma) { return -EPERM; } static int dot_lustre_mdd_unlink(const struct lu_env *env, struct md_object *pobj, struct md_object *cobj, const struct lu_name *lname, struct md_attr *ma) { return -EPERM; } static int dot_lustre_mdd_name_insert(const struct lu_env *env, struct md_object *obj, const struct lu_name *lname, const struct lu_fid *fid, const struct md_attr *ma) { return -EPERM; } static int dot_lustre_mdd_name_remove(const struct lu_env *env, struct md_object *obj, const struct lu_name *lname, const struct md_attr *ma) { return -EPERM; } static int dot_lustre_mdd_rename_tgt(const struct lu_env *env, struct md_object *pobj, struct md_object *tobj, const struct lu_fid *fid, const struct lu_name *lname, struct md_attr *ma) { return -EPERM; } static struct md_dir_operations mdd_dot_lustre_dir_ops = { .mdo_is_subdir = mdd_is_subdir, .mdo_lookup = dot_lustre_mdd_lookup, .mdo_lock_mode = dot_lustre_mdd_lock_mode, .mdo_create = dot_lustre_mdd_create, .mdo_create_data = dot_lustre_mdd_create_data, .mdo_rename = dot_lustre_mdd_rename, .mdo_link = dot_lustre_mdd_link, .mdo_unlink = dot_lustre_mdd_unlink, .mdo_name_insert = dot_lustre_mdd_name_insert, .mdo_name_remove = dot_lustre_mdd_name_remove, .mdo_rename_tgt = dot_lustre_mdd_rename_tgt, }; static int obf_attr_get(const struct lu_env *env, struct md_object *obj, struct md_attr *ma) { int rc = 0; if (ma->ma_need & MA_INODE) { struct mdd_device *mdd = mdo2mdd(obj); /* "fid" is a virtual object and hence does not have any "real" * attributes. So we reuse attributes of .lustre for "fid" dir */ ma->ma_need |= MA_INODE; rc = dot_lustre_mdd_attr_get(env, &mdd->mdd_dot_lustre->mod_obj, ma); if (rc) return rc; ma->ma_valid |= MA_INODE; } /* "fid" directory does not have any striping information. */ if (ma->ma_need & MA_LOV) { struct mdd_object *mdd_obj = md2mdd_obj(obj); if (ma->ma_valid & MA_LOV) return 0; if (!(S_ISREG(mdd_object_type(mdd_obj)) || S_ISDIR(mdd_object_type(mdd_obj)))) return 0; if (ma->ma_need & MA_LOV_DEF) { rc = mdd_get_default_md(mdd_obj, ma->ma_lmm, &ma->ma_lmm_size); if (rc > 0) { ma->ma_valid |= MA_LOV; rc = 0; } } } return rc; } static int obf_attr_set(const struct lu_env *env, struct md_object *obj, const struct md_attr *ma) { return -EPERM; } static int obf_xattr_get(const struct lu_env *env, struct md_object *obj, struct lu_buf *buf, const char *name) { return 0; } static int obf_mdd_open(const struct lu_env *env, struct md_object *obj, int flags) { struct mdd_object *mdd_obj = md2mdd_obj(obj); mdd_write_lock(env, mdd_obj, MOR_TGT_CHILD); mdd_obj->mod_count++; mdd_write_unlock(env, mdd_obj); return 0; } static int obf_mdd_close(const struct lu_env *env, struct md_object *obj, struct md_attr *ma) { struct mdd_object *mdd_obj = md2mdd_obj(obj); mdd_write_lock(env, mdd_obj, MOR_TGT_CHILD); mdd_obj->mod_count--; mdd_write_unlock(env, mdd_obj); return 0; } /** Nothing to list in "fid" directory */ static int obf_mdd_readpage(const struct lu_env *env, struct md_object *obj, const struct lu_rdpg *rdpg) { return -EPERM; } static int obf_path(const struct lu_env *env, struct md_object *obj, char *path, int pathlen, __u64 *recno, int *linkno) { return -ENOSYS; } static struct md_object_operations mdd_obf_obj_ops = { .moo_attr_get = obf_attr_get, .moo_attr_set = obf_attr_set, .moo_xattr_get = obf_xattr_get, .moo_open = obf_mdd_open, .moo_close = obf_mdd_close, .moo_readpage = obf_mdd_readpage, .moo_path = obf_path }; /** * Lookup method for "fid" object. Only filenames with correct SEQ:OID format * are valid. We also check if object with passed fid exists or not. */ static int obf_lookup(const struct lu_env *env, struct md_object *p, const struct lu_name *lname, struct lu_fid *f, struct md_op_spec *spec) { char *name = (char *)lname->ln_name; struct mdd_device *mdd = mdo2mdd(p); struct mdd_object *child; int rc = 0; while (*name == '[') name++; sscanf(name, SFID, RFID(f)); if (!fid_is_sane(f)) { CWARN("bad FID format [%s], should be "DFID"\n", lname->ln_name, (__u64)1, 2, 0); GOTO(out, rc = -EINVAL); } /* Check if object with this fid exists */ child = mdd_object_find(env, mdd, f); if (child == NULL) GOTO(out, rc = 0); if (IS_ERR(child)) GOTO(out, rc = PTR_ERR(child)); if (mdd_object_exists(child) == 0) rc = -ENOENT; mdd_object_put(env, child); out: return rc; } static int obf_create(const struct lu_env *env, struct md_object *pobj, const struct lu_name *lname, struct md_object *child, struct md_op_spec *spec, struct md_attr* ma) { return -EPERM; } static int obf_rename(const struct lu_env *env, struct md_object *src_pobj, struct md_object *tgt_pobj, const struct lu_fid *lf, const struct lu_name *lsname, struct md_object *tobj, const struct lu_name *ltname, struct md_attr *ma) { return -EPERM; } static int obf_link(const struct lu_env *env, struct md_object *tgt_obj, struct md_object *src_obj, const struct lu_name *lname, struct md_attr *ma) { return -EPERM; } static int obf_unlink(const struct lu_env *env, struct md_object *pobj, struct md_object *cobj, const struct lu_name *lname, struct md_attr *ma) { return -EPERM; } static struct md_dir_operations mdd_obf_dir_ops = { .mdo_lookup = obf_lookup, .mdo_create = obf_create, .mdo_rename = obf_rename, .mdo_link = obf_link, .mdo_unlink = obf_unlink }; /** * Create special in-memory "fid" object for open-by-fid. */ static int mdd_obf_setup(const struct lu_env *env, struct mdd_device *m) { struct mdd_object *mdd_obf; struct lu_object *obf_lu_obj; int rc = 0; m->mdd_dot_lustre_objs.mdd_obf = mdd_object_find(env, m, &LU_OBF_FID); if (m->mdd_dot_lustre_objs.mdd_obf == NULL || IS_ERR(m->mdd_dot_lustre_objs.mdd_obf)) GOTO(out, rc = -ENOENT); mdd_obf = m->mdd_dot_lustre_objs.mdd_obf; mdd_obf->mod_obj.mo_dir_ops = &mdd_obf_dir_ops; mdd_obf->mod_obj.mo_ops = &mdd_obf_obj_ops; /* Don't allow objects to be created in "fid" dir */ mdd_obf->mod_flags |= IMMUTE_OBJ; obf_lu_obj = mdd2lu_obj(mdd_obf); obf_lu_obj->lo_header->loh_attr |= (LOHA_EXISTS | S_IFDIR); out: return rc; } /** Setup ".lustre" directory object */ static int mdd_dot_lustre_setup(const struct lu_env *env, struct mdd_device *m) { struct dt_object *dt_dot_lustre; struct lu_fid *fid = &mdd_env_info(env)->mti_fid; int rc; rc = create_dot_lustre_dir(env, m); if (rc) return rc; dt_dot_lustre = dt_store_open(env, m->mdd_child, mdd_root_dir_name, dot_lustre_name, fid); if (IS_ERR(dt_dot_lustre)) { rc = PTR_ERR(dt_dot_lustre); GOTO(out, rc); } /* references are released in mdd_device_shutdown() */ m->mdd_dot_lustre = lu2mdd_obj(lu_object_locate(dt_dot_lustre->do_lu.lo_header, &mdd_device_type)); m->mdd_dot_lustre->mod_obj.mo_dir_ops = &mdd_dot_lustre_dir_ops; m->mdd_dot_lustre->mod_obj.mo_ops = &mdd_dot_lustre_obj_ops; rc = mdd_obf_setup(env, m); if (rc) CERROR("Error initializing \"fid\" object - %d.\n", rc); out: RETURN(rc); } static int mdd_process_config(const struct lu_env *env, struct lu_device *d, struct lustre_cfg *cfg) { struct mdd_device *m = lu2mdd_dev(d); struct dt_device *dt = m->mdd_child; struct lu_device *next = &dt->dd_lu_dev; int rc; ENTRY; switch (cfg->lcfg_command) { case LCFG_PARAM: { struct lprocfs_static_vars lvars; lprocfs_mdd_init_vars(&lvars); rc = class_process_proc_param(PARAM_MDD, lvars.obd_vars, cfg,m); if (rc > 0 || rc == -ENOSYS) /* we don't understand; pass it on */ rc = next->ld_ops->ldo_process_config(env, next, cfg); break; } case LCFG_SETUP: rc = next->ld_ops->ldo_process_config(env, next, cfg); if (rc) GOTO(out, rc); dt->dd_ops->dt_conf_get(env, dt, &m->mdd_dt_conf); rc = mdd_init_obd(env, m, cfg); if (rc) { CERROR("lov init error %d \n", rc); GOTO(out, rc); } rc = mdd_txn_init_credits(env, m); if (rc) break; mdd_changelog_init(env, m); break; case LCFG_CLEANUP: mdd_device_shutdown(env, m, cfg); default: rc = next->ld_ops->ldo_process_config(env, next, cfg); break; } out: RETURN(rc); } #if 0 static int mdd_lov_set_nextid(const struct lu_env *env, struct mdd_device *mdd) { struct mds_obd *mds = &mdd->mdd_obd_dev->u.mds; int rc; ENTRY; LASSERT(mds->mds_lov_objids != NULL); rc = obd_set_info_async(mds->mds_lov_exp, strlen(KEY_NEXT_ID), KEY_NEXT_ID, mds->mds_lov_desc.ld_tgt_count, mds->mds_lov_objids, NULL); RETURN(rc); } static int mdd_cleanup_unlink_llog(const struct lu_env *env, struct mdd_device *mdd) { /* XXX: to be implemented! */ return 0; } #endif static int mdd_recovery_complete(const struct lu_env *env, struct lu_device *d) { struct mdd_device *mdd = lu2mdd_dev(d); struct lu_device *next = &mdd->mdd_child->dd_lu_dev; struct obd_device *obd = mdd2obd_dev(mdd); int rc; ENTRY; LASSERT(mdd != NULL); LASSERT(obd != NULL); #if 0 /* XXX: Do we need this in new stack? */ rc = mdd_lov_set_nextid(env, mdd); if (rc) { CERROR("mdd_lov_set_nextid() failed %d\n", rc); RETURN(rc); } /* XXX: cleanup unlink. */ rc = mdd_cleanup_unlink_llog(env, mdd); if (rc) { CERROR("mdd_cleanup_unlink_llog() failed %d\n", rc); RETURN(rc); } #endif /* Call that with obd_recovering = 1 just to update objids */ obd_notify(obd->u.mds.mds_lov_obd, NULL, (obd->obd_async_recov ? OBD_NOTIFY_SYNC_NONBLOCK : OBD_NOTIFY_SYNC), NULL); /* Drop obd_recovering to 0 and call o_postrecov to recover mds_lov */ obd->obd_recovering = 0; obd->obd_type->typ_dt_ops->o_postrecov(obd); /* XXX: orphans handling. */ __mdd_orphan_cleanup(env, mdd); rc = next->ld_ops->ldo_recovery_complete(env, next); RETURN(rc); } static int mdd_prepare(const struct lu_env *env, struct lu_device *pdev, struct lu_device *cdev) { struct mdd_device *mdd = lu2mdd_dev(cdev); struct lu_device *next = &mdd->mdd_child->dd_lu_dev; struct dt_object *root; int rc; ENTRY; rc = next->ld_ops->ldo_prepare(env, cdev, next); if (rc) GOTO(out, rc); dt_txn_callback_add(mdd->mdd_child, &mdd->mdd_txn_cb); root = dt_store_open(env, mdd->mdd_child, "", mdd_root_dir_name, &mdd->mdd_root_fid); if (!IS_ERR(root)) { LASSERT(root != NULL); lu_object_put(env, &root->do_lu); rc = orph_index_init(env, mdd); } else { rc = PTR_ERR(root); } if (rc) GOTO(out, rc); rc = mdd_dot_lustre_setup(env, mdd); if (rc) { CERROR("Error(%d) initializing .lustre objects\n", rc); GOTO(out, rc); } out: RETURN(rc); } const struct lu_device_operations mdd_lu_ops = { .ldo_object_alloc = mdd_object_alloc, .ldo_process_config = mdd_process_config, .ldo_recovery_complete = mdd_recovery_complete, .ldo_prepare = mdd_prepare, }; /* * No permission check is needed. */ static int mdd_root_get(const struct lu_env *env, struct md_device *m, struct lu_fid *f) { struct mdd_device *mdd = lu2mdd_dev(&m->md_lu_dev); ENTRY; *f = mdd->mdd_root_fid; RETURN(0); } /* * No permission check is needed. */ static int mdd_statfs(const struct lu_env *env, struct md_device *m, cfs_kstatfs_t *sfs) { struct mdd_device *mdd = lu2mdd_dev(&m->md_lu_dev); int rc; ENTRY; rc = mdd_child_ops(mdd)->dt_statfs(env, mdd->mdd_child, sfs); RETURN(rc); } /* * No permission check is needed. */ static int mdd_maxsize_get(const struct lu_env *env, struct md_device *m, int *md_size, int *cookie_size) { struct mdd_device *mdd = lu2mdd_dev(&m->md_lu_dev); ENTRY; *md_size = mdd_lov_mdsize(env, mdd); *cookie_size = mdd_lov_cookiesize(env, mdd); RETURN(0); } static int mdd_init_capa_ctxt(const struct lu_env *env, struct md_device *m, int mode, unsigned long timeout, __u32 alg, struct lustre_capa_key *keys) { struct mdd_device *mdd = lu2mdd_dev(&m->md_lu_dev); struct mds_obd *mds = &mdd2obd_dev(mdd)->u.mds; int rc; ENTRY; /* need barrier for mds_capa_keys access. */ cfs_down_write(&mds->mds_notify_lock); mds->mds_capa_keys = keys; cfs_up_write(&mds->mds_notify_lock); rc = mdd_child_ops(mdd)->dt_init_capa_ctxt(env, mdd->mdd_child, mode, timeout, alg, keys); RETURN(rc); } static int mdd_update_capa_key(const struct lu_env *env, struct md_device *m, struct lustre_capa_key *key) { struct mds_capa_info info = { .uuid = NULL, .capa = key }; struct mdd_device *mdd = lu2mdd_dev(&m->md_lu_dev); struct obd_export *lov_exp = mdd2obd_dev(mdd)->u.mds.mds_lov_exp; int rc; ENTRY; rc = obd_set_info_async(lov_exp, sizeof(KEY_CAPA_KEY), KEY_CAPA_KEY, sizeof(info), &info, NULL); RETURN(rc); } static int mdd_llog_ctxt_get(const struct lu_env *env, struct md_device *m, int idx, void **h) { struct mdd_device *mdd = lu2mdd_dev(&m->md_lu_dev); *h = llog_group_get_ctxt(&mdd2obd_dev(mdd)->obd_olg, idx); return (*h == NULL ? -ENOENT : 0); } static struct lu_device *mdd_device_alloc(const struct lu_env *env, struct lu_device_type *t, struct lustre_cfg *lcfg) { struct lu_device *l; struct mdd_device *m; OBD_ALLOC_PTR(m); if (m == NULL) { l = ERR_PTR(-ENOMEM); } else { md_device_init(&m->mdd_md_dev, t); l = mdd2lu_dev(m); l->ld_ops = &mdd_lu_ops; m->mdd_md_dev.md_ops = &mdd_ops; md_upcall_init(&m->mdd_md_dev, NULL); } return l; } static struct lu_device *mdd_device_free(const struct lu_env *env, struct lu_device *lu) { struct mdd_device *m = lu2mdd_dev(lu); struct lu_device *next = &m->mdd_child->dd_lu_dev; ENTRY; LASSERT(cfs_atomic_read(&lu->ld_ref) == 0); md_device_fini(&m->mdd_md_dev); OBD_FREE_PTR(m); RETURN(next); } static struct obd_ops mdd_obd_device_ops = { .o_owner = THIS_MODULE }; /* context key constructor/destructor: mdd_ucred_key_init, mdd_ucred_key_fini */ LU_KEY_INIT_FINI(mdd_ucred, struct md_ucred); static struct lu_context_key mdd_ucred_key = { .lct_tags = LCT_SESSION, .lct_init = mdd_ucred_key_init, .lct_fini = mdd_ucred_key_fini }; struct md_ucred *md_ucred(const struct lu_env *env) { LASSERT(env->le_ses != NULL); return lu_context_key_get(env->le_ses, &mdd_ucred_key); } EXPORT_SYMBOL(md_ucred); /* * context key constructor/destructor: * mdd_capainfo_key_init, mdd_capainfo_key_fini */ LU_KEY_INIT_FINI(mdd_capainfo, struct md_capainfo); struct lu_context_key mdd_capainfo_key = { .lct_tags = LCT_SESSION, .lct_init = mdd_capainfo_key_init, .lct_fini = mdd_capainfo_key_fini }; struct md_capainfo *md_capainfo(const struct lu_env *env) { /* NB, in mdt_init0 */ if (env->le_ses == NULL) return NULL; return lu_context_key_get(env->le_ses, &mdd_capainfo_key); } EXPORT_SYMBOL(md_capainfo); /* * context key constructor/destructor: * mdd_quota_key_init, mdd_quota_key_fini */ LU_KEY_INIT_FINI(mdd_quota, struct md_quota); struct lu_context_key mdd_quota_key = { .lct_tags = LCT_SESSION, .lct_init = mdd_quota_key_init, .lct_fini = mdd_quota_key_fini }; struct md_quota *md_quota(const struct lu_env *env) { LASSERT(env->le_ses != NULL); return lu_context_key_get(env->le_ses, &mdd_quota_key); } EXPORT_SYMBOL(md_quota); static int mdd_changelog_user_register(struct mdd_device *mdd, int *id) { struct llog_ctxt *ctxt; struct llog_changelog_user_rec *rec; int rc; ENTRY; ctxt = llog_get_context(mdd2obd_dev(mdd),LLOG_CHANGELOG_USER_ORIG_CTXT); if (ctxt == NULL) RETURN(-ENXIO); OBD_ALLOC_PTR(rec); if (rec == NULL) { llog_ctxt_put(ctxt); RETURN(-ENOMEM); } /* Assume we want it on since somebody registered */ rc = mdd_changelog_on(mdd, 1); if (rc) GOTO(out, rc); rec->cur_hdr.lrh_len = sizeof(*rec); rec->cur_hdr.lrh_type = CHANGELOG_USER_REC; cfs_spin_lock(&mdd->mdd_cl.mc_user_lock); if (mdd->mdd_cl.mc_lastuser == (unsigned int)(-1)) { cfs_spin_unlock(&mdd->mdd_cl.mc_user_lock); CERROR("Maximum number of changelog users exceeded!\n"); GOTO(out, rc = -EOVERFLOW); } *id = rec->cur_id = ++mdd->mdd_cl.mc_lastuser; rec->cur_endrec = mdd->mdd_cl.mc_index; cfs_spin_unlock(&mdd->mdd_cl.mc_user_lock); rc = llog_add(ctxt, &rec->cur_hdr, NULL, NULL, 0); CDEBUG(D_IOCTL, "Registered changelog user %d\n", *id); out: OBD_FREE_PTR(rec); llog_ctxt_put(ctxt); RETURN(rc); } struct mdd_changelog_user_data { __u64 mcud_endrec; /**< purge record for this user */ __u64 mcud_minrec; /**< lowest changelog recno still referenced */ __u32 mcud_id; __u32 mcud_minid; /**< user id with lowest rec reference */ __u32 mcud_usercount; int mcud_found:1; }; #define MCUD_UNREGISTER -1LL /** Two things: * 1. Find the smallest record everyone is willing to purge * 2. Update the last purgeable record for this user */ static int mdd_changelog_user_purge_cb(struct llog_handle *llh, struct llog_rec_hdr *hdr, void *data) { struct llog_changelog_user_rec *rec; struct mdd_changelog_user_data *mcud = (struct mdd_changelog_user_data *)data; int rc; ENTRY; LASSERT(llh->lgh_hdr->llh_flags & LLOG_F_IS_PLAIN); rec = (struct llog_changelog_user_rec *)hdr; mcud->mcud_usercount++; /* If we have a new endrec for this id, use it for the following min check instead of its old value */ if (rec->cur_id == mcud->mcud_id) rec->cur_endrec = max(rec->cur_endrec, mcud->mcud_endrec); /* Track the minimum referenced record */ if (mcud->mcud_minid == 0 || mcud->mcud_minrec > rec->cur_endrec) { mcud->mcud_minid = rec->cur_id; mcud->mcud_minrec = rec->cur_endrec; } if (rec->cur_id != mcud->mcud_id) RETURN(0); /* Update this user's record */ mcud->mcud_found = 1; /* Special case: unregister this user */ if (mcud->mcud_endrec == MCUD_UNREGISTER) { struct llog_cookie cookie; cookie.lgc_lgl = llh->lgh_id; cookie.lgc_index = hdr->lrh_index; rc = llog_cat_cancel_records(llh->u.phd.phd_cat_handle, 1, &cookie); if (rc == 0) mcud->mcud_usercount--; RETURN(rc); } /* Update the endrec */ CDEBUG(D_IOCTL, "Rewriting changelog user %d endrec to "LPU64"\n", mcud->mcud_id, rec->cur_endrec); /* hdr+1 is loc of data */ hdr->lrh_len -= sizeof(*hdr) + sizeof(struct llog_rec_tail); rc = llog_write_rec(llh, hdr, NULL, 0, (void *)(hdr + 1), hdr->lrh_index); RETURN(rc); } static int mdd_changelog_user_purge(struct mdd_device *mdd, int id, long long endrec) { struct mdd_changelog_user_data data; struct llog_ctxt *ctxt; int rc; ENTRY; CDEBUG(D_IOCTL, "Purge request: id=%d, endrec=%lld\n", id, endrec); data.mcud_id = id; data.mcud_minid = 0; data.mcud_minrec = 0; data.mcud_usercount = 0; data.mcud_endrec = endrec; cfs_spin_lock(&mdd->mdd_cl.mc_lock); endrec = mdd->mdd_cl.mc_index; cfs_spin_unlock(&mdd->mdd_cl.mc_lock); if ((data.mcud_endrec == 0) || ((data.mcud_endrec > endrec) && (data.mcud_endrec != MCUD_UNREGISTER))) data.mcud_endrec = endrec; ctxt = llog_get_context(mdd2obd_dev(mdd),LLOG_CHANGELOG_USER_ORIG_CTXT); if (ctxt == NULL) return -ENXIO; LASSERT(ctxt->loc_handle->lgh_hdr->llh_flags & LLOG_F_IS_CAT); rc = llog_cat_process(ctxt->loc_handle, mdd_changelog_user_purge_cb, (void *)&data, 0, 0); if ((rc >= 0) && (data.mcud_minrec > 0)) { CDEBUG(D_IOCTL, "Purging changelog entries up to "LPD64 ", referenced by "CHANGELOG_USER_PREFIX"%d\n", data.mcud_minrec, data.mcud_minid); rc = mdd_changelog_llog_cancel(mdd, data.mcud_minrec); } else { CWARN("Could not determine changelog records to purge; rc=%d\n", rc); } llog_ctxt_put(ctxt); if (!data.mcud_found) { CWARN("No entry for user %d. Last changelog reference is " LPD64" by changelog user %d\n", data.mcud_id, data.mcud_minrec, data.mcud_minid); rc = -ENOENT; } if (!rc && data.mcud_usercount == 0) /* No more users; turn changelogs off */ rc = mdd_changelog_on(mdd, 0); RETURN (rc); } /** mdd_iocontrol * May be called remotely from mdt_iocontrol_handle or locally from * mdt_iocontrol. Data may be freeform - remote handling doesn't enforce * an obd_ioctl_data format (but local ioctl handler does). * \param cmd - ioc * \param len - data len * \param karg - ioctl data, in kernel space */ static int mdd_iocontrol(const struct lu_env *env, struct md_device *m, unsigned int cmd, int len, void *karg) { struct mdd_device *mdd; struct obd_ioctl_data *data = karg; int rc; ENTRY; mdd = lu2mdd_dev(&m->md_lu_dev); /* Doesn't use obd_ioctl_data */ if (cmd == OBD_IOC_CHANGELOG_CLEAR) { struct changelog_setinfo *cs = karg; rc = mdd_changelog_user_purge(mdd, cs->cs_id, cs->cs_recno); RETURN(rc); } /* Below ioctls use obd_ioctl_data */ if (len != sizeof(*data)) { CERROR("Bad ioctl size %d\n", len); RETURN(-EINVAL); } if (data->ioc_version != OBD_IOCTL_VERSION) { CERROR("Bad magic %x != %x\n", data->ioc_version, OBD_IOCTL_VERSION); RETURN(-EINVAL); } switch (cmd) { case OBD_IOC_CHANGELOG_REG: rc = mdd_changelog_user_register(mdd, &data->ioc_u32_1); break; case OBD_IOC_CHANGELOG_DEREG: rc = mdd_changelog_user_purge(mdd, data->ioc_u32_1, MCUD_UNREGISTER); break; default: rc = -EOPNOTSUPP; } RETURN (rc); } /* type constructor/destructor: mdd_type_init, mdd_type_fini */ LU_TYPE_INIT_FINI(mdd, &mdd_thread_key, &mdd_ucred_key, &mdd_capainfo_key, &mdd_quota_key); const struct md_device_operations mdd_ops = { .mdo_statfs = mdd_statfs, .mdo_root_get = mdd_root_get, .mdo_maxsize_get = mdd_maxsize_get, .mdo_init_capa_ctxt = mdd_init_capa_ctxt, .mdo_update_capa_key= mdd_update_capa_key, .mdo_llog_ctxt_get = mdd_llog_ctxt_get, .mdo_iocontrol = mdd_iocontrol, #ifdef HAVE_QUOTA_SUPPORT .mdo_quota = { .mqo_notify = mdd_quota_notify, .mqo_setup = mdd_quota_setup, .mqo_cleanup = mdd_quota_cleanup, .mqo_recovery = mdd_quota_recovery, .mqo_check = mdd_quota_check, .mqo_on = mdd_quota_on, .mqo_off = mdd_quota_off, .mqo_setinfo = mdd_quota_setinfo, .mqo_getinfo = mdd_quota_getinfo, .mqo_setquota = mdd_quota_setquota, .mqo_getquota = mdd_quota_getquota, .mqo_getoinfo = mdd_quota_getoinfo, .mqo_getoquota = mdd_quota_getoquota, .mqo_invalidate = mdd_quota_invalidate, .mqo_finvalidate = mdd_quota_finvalidate } #endif }; static struct lu_device_type_operations mdd_device_type_ops = { .ldto_init = mdd_type_init, .ldto_fini = mdd_type_fini, .ldto_start = mdd_type_start, .ldto_stop = mdd_type_stop, .ldto_device_alloc = mdd_device_alloc, .ldto_device_free = mdd_device_free, .ldto_device_init = mdd_device_init, .ldto_device_fini = mdd_device_fini }; static struct lu_device_type mdd_device_type = { .ldt_tags = LU_DEVICE_MD, .ldt_name = LUSTRE_MDD_NAME, .ldt_ops = &mdd_device_type_ops, .ldt_ctx_tags = LCT_MD_THREAD }; /* context key constructor: mdd_key_init */ LU_KEY_INIT(mdd, struct mdd_thread_info); static void mdd_key_fini(const struct lu_context *ctx, struct lu_context_key *key, void *data) { struct mdd_thread_info *info = data; if (info->mti_max_lmm != NULL) OBD_FREE(info->mti_max_lmm, info->mti_max_lmm_size); if (info->mti_max_cookie != NULL) OBD_FREE(info->mti_max_cookie, info->mti_max_cookie_size); mdd_buf_put(&info->mti_big_buf); OBD_FREE_PTR(info); } /* context key: mdd_thread_key */ LU_CONTEXT_KEY_DEFINE(mdd, LCT_MD_THREAD); static struct lu_local_obj_desc llod_capa_key = { .llod_name = CAPA_KEYS, .llod_oid = MDD_CAPA_KEYS_OID, .llod_is_index = 0, }; static struct lu_local_obj_desc llod_mdd_orphan = { .llod_name = orph_index_name, .llod_oid = MDD_ORPHAN_OID, .llod_is_index = 1, .llod_feat = &dt_directory_features, }; static struct lu_local_obj_desc llod_mdd_root = { .llod_name = mdd_root_dir_name, .llod_oid = MDD_ROOT_INDEX_OID, .llod_is_index = 1, .llod_feat = &dt_directory_features, }; static int __init mdd_mod_init(void) { struct lprocfs_static_vars lvars; lprocfs_mdd_init_vars(&lvars); llo_local_obj_register(&llod_capa_key); llo_local_obj_register(&llod_mdd_orphan); llo_local_obj_register(&llod_mdd_root); return class_register_type(&mdd_obd_device_ops, NULL, lvars.module_vars, LUSTRE_MDD_NAME, &mdd_device_type); } static void __exit mdd_mod_exit(void) { llo_local_obj_unregister(&llod_capa_key); llo_local_obj_unregister(&llod_mdd_orphan); llo_local_obj_unregister(&llod_mdd_root); class_unregister_type(LUSTRE_MDD_NAME); } MODULE_AUTHOR("Sun Microsystems, Inc. "); MODULE_DESCRIPTION("Lustre Meta-data Device Prototype ("LUSTRE_MDD_NAME")"); MODULE_LICENSE("GPL"); cfs_module(mdd, "0.1.0", mdd_mod_init, mdd_mod_exit);