/* * 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) 2007, 2010, Oracle and/or its affiliates. All rights reserved. * Use is subject to license terms. * * Copyright (c) 2011, 2014, Intel Corporation. */ /* * This file is part of Lustre, http://www.lustre.org/ * Lustre is a trademark of Sun Microsystems, Inc. * * lustre/mdd/mdd_dir.c * * Lustre Metadata Server (mdd) routines * * Author: Wang Di */ #define DEBUG_SUBSYSTEM S_MDS #include #include #include #include #include "mdd_internal.h" static const char dot[] = "."; static const char dotdot[] = ".."; static struct lu_name lname_dotdot = { (char *) dotdot, sizeof(dotdot) - 1 }; static inline int mdd_name_check(struct mdd_device *m, const struct lu_name *ln) { if (!lu_name_is_valid(ln)) return -EINVAL; else if (ln->ln_namelen > m->mdd_dt_conf.ddp_max_name_len) return -ENAMETOOLONG; else return 0; } /* Get FID from name and parent */ static int __mdd_lookup(const struct lu_env *env, struct md_object *pobj, const struct lu_attr *pattr, const struct lu_name *lname, struct lu_fid* fid, int mask) { const char *name = lname->ln_name; const struct dt_key *key = (const struct dt_key *)name; struct mdd_object *mdd_obj = md2mdd_obj(pobj); struct mdd_device *m = mdo2mdd(pobj); struct dt_object *dir = mdd_object_child(mdd_obj); int rc; ENTRY; if (unlikely(mdd_is_dead_obj(mdd_obj))) RETURN(-ESTALE); if (mdd_object_remote(mdd_obj)) { CDEBUG(D_INFO, "%s: Object "DFID" locates on remote server\n", mdd2obd_dev(m)->obd_name, PFID(mdo2fid(mdd_obj))); } else if (!mdd_object_exists(mdd_obj)) { RETURN(-ESTALE); } rc = mdd_permission_internal_locked(env, mdd_obj, pattr, mask, MOR_TGT_PARENT); if (rc) RETURN(rc); if (likely(S_ISDIR(mdd_object_type(mdd_obj)) && dt_try_as_dir(env, dir))) rc = dt_lookup(env, dir, (struct dt_rec *)fid, key); else rc = -ENOTDIR; RETURN(rc); } int mdd_lookup(const struct lu_env *env, struct md_object *pobj, const struct lu_name *lname, struct lu_fid *fid, struct md_op_spec *spec) { struct lu_attr *pattr = MDD_ENV_VAR(env, pattr); int rc; ENTRY; rc = mdd_la_get(env, md2mdd_obj(pobj), pattr); if (rc != 0) RETURN(rc); rc = __mdd_lookup(env, pobj, pattr, lname, fid, (spec != NULL && spec->sp_permitted) ? 0 : MAY_EXEC); RETURN(rc); } static inline int mdd_parent_fid(const struct lu_env *env, struct mdd_object *obj, const struct lu_attr *attr, struct lu_fid *fid) { return __mdd_lookup(env, &obj->mod_obj, attr, &lname_dotdot, fid, 0); } /* * For root fid use special function, which does not compare version component * of fid. Version component is different for root fids on all MDTs. */ int mdd_is_root(struct mdd_device *mdd, const struct lu_fid *fid) { return fid_seq(&mdd->mdd_root_fid) == fid_seq(fid) && fid_oid(&mdd->mdd_root_fid) == fid_oid(fid); } /* * return 1: if lf is the fid of the ancestor of p1; * return 0: if not; * * return -EREMOTE: if remote object is found, in this * case fid of remote object is saved to @pf; * * otherwise: values < 0, errors. */ static int mdd_is_parent(const struct lu_env *env, struct mdd_device *mdd, struct mdd_object *p1, const struct lu_attr *attr, const struct lu_fid *lf, struct lu_fid *pf) { struct mdd_object *parent = NULL; struct lu_fid *pfid; int rc; ENTRY; LASSERT(!lu_fid_eq(mdo2fid(p1), lf)); pfid = &mdd_env_info(env)->mti_fid; /* Check for root first. */ if (mdd_is_root(mdd, mdo2fid(p1))) RETURN(0); for(;;) { /* this is done recursively */ rc = mdd_parent_fid(env, p1, attr, pfid); if (rc) GOTO(out, rc); if (mdd_is_root(mdd, pfid)) GOTO(out, rc = 0); if (lu_fid_eq(pfid, &mdd->mdd_local_root_fid)) GOTO(out, rc = 0); if (lu_fid_eq(pfid, lf)) GOTO(out, rc = 1); if (parent) mdd_object_put(env, parent); parent = mdd_object_find(env, mdd, pfid); if (IS_ERR(parent)) { GOTO(out, rc = PTR_ERR(parent)); } else if (mdd_object_remote(parent)) { /*FIXME: Because of the restriction of rename in Phase I. * If the parent is remote, we just assumed lf is not the * parent of P1 for now */ GOTO(out, rc = 0); } p1 = parent; } EXIT; out: if (parent && !IS_ERR(parent)) mdd_object_put(env, parent); return rc; } /* * No permission check is needed. * * returns 1: if fid is ancestor of @mo; * returns 0: if fid is not an ancestor of @mo; * * returns EREMOTE if remote object is found, fid of remote object is saved to * @fid; * * returns < 0: if error */ int mdd_is_subdir(const struct lu_env *env, struct md_object *mo, const struct lu_fid *fid, struct lu_fid *sfid) { struct mdd_device *mdd = mdo2mdd(mo); struct lu_attr *attr = MDD_ENV_VAR(env, cattr); int rc; ENTRY; if (!S_ISDIR(mdd_object_type(md2mdd_obj(mo)))) RETURN(0); rc = mdd_la_get(env, md2mdd_obj(mo), attr); if (rc != 0) RETURN(rc); rc = mdd_is_parent(env, mdd, md2mdd_obj(mo), attr, fid, sfid); if (rc == 0) { /* found root */ fid_zero(sfid); } else if (rc == 1) { /* found @fid is parent */ *sfid = *fid; rc = 0; } RETURN(rc); } /* * Check that @dir contains no entries except (possibly) dot and dotdot. * * Returns: * * 0 empty * -ENOTDIR not a directory object * -ENOTEMPTY not empty * -ve other error * */ static int mdd_dir_is_empty(const struct lu_env *env, struct mdd_object *dir) { struct dt_it *it; struct dt_object *obj; const struct dt_it_ops *iops; int result; ENTRY; obj = mdd_object_child(dir); if (!dt_try_as_dir(env, obj)) RETURN(-ENOTDIR); iops = &obj->do_index_ops->dio_it; it = iops->init(env, obj, LUDA_64BITHASH); if (!IS_ERR(it)) { result = iops->get(env, it, (const struct dt_key *)""); if (result > 0) { int i; for (result = 0, i = 0; result == 0 && i < 3; ++i) result = iops->next(env, it); if (result == 0) result = -ENOTEMPTY; else if (result == 1) result = 0; } else if (result == 0) /* * Huh? Index contains no zero key? */ result = -EIO; iops->put(env, it); iops->fini(env, it); } else result = PTR_ERR(it); RETURN(result); } /** * Determine if the target object can be hard linked, and right now it only * checks if the link count reach the maximum limit. Note: for ldiskfs, the * directory nlink count might exceed the maximum link count(see * osd_object_ref_add), so it only check nlink for non-directories. * * \param[in] env thread environment * \param[in] obj object being linked to * \param[in] la attributes of \a obj * * \retval 0 if \a obj can be hard linked * \retval negative error if \a obj is a directory or has too * many links */ static int __mdd_may_link(const struct lu_env *env, struct mdd_object *obj, const struct lu_attr *la) { struct mdd_device *m = mdd_obj2mdd_dev(obj); ENTRY; LASSERT(la != NULL); /* Subdir count limitation can be broken through * (see osd_object_ref_add), so only check non-directory here. */ if (!S_ISDIR(la->la_mode) && la->la_nlink >= m->mdd_dt_conf.ddp_max_nlink) RETURN(-EMLINK); RETURN(0); } /** * Check whether it may create the cobj under the pobj. * * \param[in] env execution environment * \param[in] pobj the parent directory * \param[in] pattr the attribute of the parent directory * \param[in] cobj the child to be created * \param[in] check_perm if check WRITE|EXEC permission for parent * * \retval = 0 create the child under this dir is allowed * \retval negative errno create the child under this dir is * not allowed */ int mdd_may_create(const struct lu_env *env, struct mdd_object *pobj, const struct lu_attr *pattr, struct mdd_object *cobj, bool check_perm) { struct mdd_thread_info *info = mdd_env_info(env); struct lu_buf *xbuf; int rc = 0; ENTRY; if (cobj && mdd_object_exists(cobj)) RETURN(-EEXIST); if (mdd_is_dead_obj(pobj)) RETURN(-ENOENT); /* If the parent is a sub-stripe, check whether it is dead */ xbuf = mdd_buf_get(env, info->mti_key, sizeof(info->mti_key)); rc = mdo_xattr_get(env, pobj, xbuf, XATTR_NAME_LMV); if (unlikely(rc > 0)) { struct lmv_mds_md_v1 *lmv1 = xbuf->lb_buf; if (le32_to_cpu(lmv1->lmv_magic) == LMV_MAGIC_STRIPE && le32_to_cpu(lmv1->lmv_hash_type) & LMV_HASH_FLAG_DEAD) RETURN(-ESTALE); } rc = 0; if (check_perm) rc = mdd_permission_internal_locked(env, pobj, pattr, MAY_WRITE | MAY_EXEC, MOR_TGT_PARENT); RETURN(rc); } /* * Check whether can unlink from the pobj in the case of "cobj == NULL". */ int mdd_may_unlink(const struct lu_env *env, struct mdd_object *pobj, const struct lu_attr *pattr, const struct lu_attr *attr) { int rc; ENTRY; if (mdd_is_dead_obj(pobj)) RETURN(-ENOENT); if (attr->la_flags & (LUSTRE_APPEND_FL | LUSTRE_IMMUTABLE_FL)) RETURN(-EPERM); rc = mdd_permission_internal_locked(env, pobj, pattr, MAY_WRITE | MAY_EXEC, MOR_TGT_PARENT); if (rc != 0) RETURN(rc); if (pattr->la_flags & LUSTRE_APPEND_FL) RETURN(-EPERM); RETURN(rc); } /* * pobj == NULL is remote ops case, under such case, pobj's * VTX feature has been checked already, no need check again. */ static inline int mdd_is_sticky(const struct lu_env *env, struct mdd_object *pobj, const struct lu_attr *pattr, struct mdd_object *cobj, const struct lu_attr *cattr) { struct lu_ucred *uc = lu_ucred_assert(env); if (pobj != NULL) { LASSERT(pattr != NULL); if (!(pattr->la_mode & S_ISVTX) || (pattr->la_uid == uc->uc_fsuid)) return 0; } LASSERT(cattr != NULL); if (cattr->la_uid == uc->uc_fsuid) return 0; return !md_capable(uc, CFS_CAP_FOWNER); } static int mdd_may_delete_entry(const struct lu_env *env, struct mdd_object *pobj, const struct lu_attr *pattr, int check_perm) { ENTRY; LASSERT(pobj != NULL); if (!mdd_object_exists(pobj)) RETURN(-ENOENT); if (mdd_is_dead_obj(pobj)) RETURN(-ENOENT); if (check_perm) { int rc; rc = mdd_permission_internal_locked(env, pobj, pattr, MAY_WRITE | MAY_EXEC, MOR_TGT_PARENT); if (rc) RETURN(rc); } if (pattr->la_flags & LUSTRE_APPEND_FL) RETURN(-EPERM); RETURN(0); } /* * Check whether it may delete the cobj from the pobj. * pobj maybe NULL */ int mdd_may_delete(const struct lu_env *env, struct mdd_object *tpobj, const struct lu_attr *tpattr, struct mdd_object *tobj, const struct lu_attr *tattr, const struct lu_attr *cattr, int check_perm, int check_empty) { int rc = 0; ENTRY; if (tpobj) { LASSERT(tpattr != NULL); rc = mdd_may_delete_entry(env, tpobj, tpattr, check_perm); if (rc != 0) RETURN(rc); } if (tobj == NULL) RETURN(0); if (!mdd_object_exists(tobj)) RETURN(-ENOENT); if (mdd_is_dead_obj(tobj)) RETURN(-ESTALE); if (mdd_is_sticky(env, tpobj, tpattr, tobj, tattr)) RETURN(-EPERM); if (tattr->la_flags & (LUSTRE_APPEND_FL | LUSTRE_IMMUTABLE_FL)) RETURN(-EPERM); /* additional check the rename case */ if (cattr) { if (S_ISDIR(cattr->la_mode)) { struct mdd_device *mdd = mdo2mdd(&tobj->mod_obj); if (!S_ISDIR(tattr->la_mode)) RETURN(-ENOTDIR); if (lu_fid_eq(mdo2fid(tobj), &mdd->mdd_root_fid)) RETURN(-EBUSY); } else if (S_ISDIR(tattr->la_mode)) RETURN(-EISDIR); } if (S_ISDIR(tattr->la_mode) && check_empty) rc = mdd_dir_is_empty(env, tobj); RETURN(rc); } /** * Check whether it can create the link file(linked to @src_obj) under * the target directory(@tgt_obj), and src_obj has been locked by * mdd_write_lock. * * \param[in] env execution environment * \param[in] tgt_obj the target directory * \param[in] tattr attributes of target directory * \param[in] lname the link name * \param[in] src_obj source object for link * \param[in] cattr attributes for source object * * \retval = 0 it is allowed to create the link file under tgt_obj * \retval negative error not allowed to create the link file */ static int mdd_link_sanity_check(const struct lu_env *env, struct mdd_object *tgt_obj, const struct lu_attr *tattr, const struct lu_name *lname, struct mdd_object *src_obj, const struct lu_attr *cattr) { struct mdd_device *m = mdd_obj2mdd_dev(src_obj); int rc = 0; ENTRY; if (!mdd_object_exists(src_obj)) RETURN(-ENOENT); if (mdd_is_dead_obj(src_obj)) RETURN(-ESTALE); /* Local ops, no lookup before link, check filename length here. */ rc = mdd_name_check(m, lname); if (rc < 0) RETURN(rc); if (cattr->la_flags & (LUSTRE_IMMUTABLE_FL | LUSTRE_APPEND_FL)) RETURN(-EPERM); if (S_ISDIR(mdd_object_type(src_obj))) RETURN(-EPERM); LASSERT(src_obj != tgt_obj); rc = mdd_may_create(env, tgt_obj, tattr, NULL, true); if (rc != 0) RETURN(rc); rc = __mdd_may_link(env, src_obj, cattr); RETURN(rc); } static int __mdd_index_delete_only(const struct lu_env *env, struct mdd_object *pobj, const char *name, struct thandle *handle) { struct dt_object *next = mdd_object_child(pobj); int rc; ENTRY; if (dt_try_as_dir(env, next)) rc = dt_delete(env, next, (struct dt_key *)name, handle); else rc = -ENOTDIR; RETURN(rc); } static int __mdd_index_insert_only(const struct lu_env *env, struct mdd_object *pobj, const struct lu_fid *lf, __u32 type, const char *name, struct thandle *handle) { struct dt_object *next = mdd_object_child(pobj); int rc; ENTRY; if (dt_try_as_dir(env, next)) { struct dt_insert_rec *rec = &mdd_env_info(env)->mti_dt_rec; struct lu_ucred *uc = lu_ucred_check(env); int ignore_quota; rec->rec_fid = lf; rec->rec_type = type; ignore_quota = uc ? uc->uc_cap & CFS_CAP_SYS_RESOURCE_MASK : 1; rc = dt_insert(env, next, (const struct dt_rec *)rec, (const struct dt_key *)name, handle, ignore_quota); } else { rc = -ENOTDIR; } RETURN(rc); } /* insert named index, add reference if isdir */ static int __mdd_index_insert(const struct lu_env *env, struct mdd_object *pobj, const struct lu_fid *lf, __u32 type, const char *name, struct thandle *handle) { int rc; ENTRY; rc = __mdd_index_insert_only(env, pobj, lf, type, name, handle); if (rc == 0 && S_ISDIR(type)) { mdd_write_lock(env, pobj, MOR_TGT_PARENT); mdo_ref_add(env, pobj, handle); mdd_write_unlock(env, pobj); } RETURN(rc); } /* delete named index, drop reference if isdir */ static int __mdd_index_delete(const struct lu_env *env, struct mdd_object *pobj, const char *name, int is_dir, struct thandle *handle) { int rc; ENTRY; rc = __mdd_index_delete_only(env, pobj, name, handle); if (rc == 0 && is_dir) { mdd_write_lock(env, pobj, MOR_TGT_PARENT); mdo_ref_del(env, pobj, handle); mdd_write_unlock(env, pobj); } RETURN(rc); } static int mdd_llog_record_calc_size(const struct lu_env *env, const struct lu_name *tname, const struct lu_name *sname) { const struct lu_ucred *uc = lu_ucred(env); enum changelog_rec_flags crf = 0; size_t hdr_size = sizeof(struct llog_changelog_rec) - sizeof(struct changelog_rec); if (sname != NULL) crf |= CLF_RENAME; if (uc != NULL && uc->uc_jobid[0] != '\0') crf |= CLF_JOBID; return llog_data_len(hdr_size + changelog_rec_offset(crf) + (tname != NULL ? tname->ln_namelen : 0) + (sname != NULL ? 1 + sname->ln_namelen : 0)); } int mdd_declare_changelog_store(const struct lu_env *env, struct mdd_device *mdd, const struct lu_name *tname, const struct lu_name *sname, struct thandle *handle) { struct obd_device *obd = mdd2obd_dev(mdd); struct llog_ctxt *ctxt; struct llog_changelog_rec *rec; struct lu_buf *buf; struct thandle *llog_th; int reclen; int rc; /* Not recording */ if (!(mdd->mdd_cl.mc_flags & CLM_ON)) return 0; reclen = mdd_llog_record_calc_size(env, tname, sname); buf = lu_buf_check_and_alloc(&mdd_env_info(env)->mti_big_buf, reclen); if (buf->lb_buf == NULL) return -ENOMEM; rec = buf->lb_buf; rec->cr_hdr.lrh_len = reclen; rec->cr_hdr.lrh_type = CHANGELOG_REC; ctxt = llog_get_context(obd, LLOG_CHANGELOG_ORIG_CTXT); if (ctxt == NULL) return -ENXIO; llog_th = thandle_get_sub(env, handle, ctxt->loc_handle->lgh_obj); if (IS_ERR(llog_th)) GOTO(out_put, rc = PTR_ERR(llog_th)); rc = llog_declare_add(env, ctxt->loc_handle, &rec->cr_hdr, llog_th); out_put: llog_ctxt_put(ctxt); return rc; } /** 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_store(const struct lu_env *env, struct mdd_device *mdd, struct llog_changelog_rec *rec, struct thandle *th) { struct obd_device *obd = mdd2obd_dev(mdd); struct llog_ctxt *ctxt; struct thandle *llog_th; int rc; rec->cr_hdr.lrh_len = llog_data_len(sizeof(*rec) + changelog_rec_varsize(&rec->cr)); /* llog_lvfs_write_rec sets the llog tail len */ rec->cr_hdr.lrh_type = CHANGELOG_REC; rec->cr.cr_time = cl_time(); 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; spin_unlock(&mdd->mdd_cl.mc_lock); ctxt = llog_get_context(obd, LLOG_CHANGELOG_ORIG_CTXT); if (ctxt == NULL) return -ENXIO; llog_th = thandle_get_sub(env, th, ctxt->loc_handle->lgh_obj); if (IS_ERR(llog_th)) GOTO(out_put, rc = PTR_ERR(llog_th)); /* nested journal transaction */ rc = llog_add(env, ctxt->loc_handle, &rec->cr_hdr, NULL, llog_th); out_put: llog_ctxt_put(ctxt); if (rc > 0) rc = 0; return rc; } static void mdd_changelog_rec_ext_rename(struct changelog_rec *rec, const struct lu_fid *sfid, const struct lu_fid *spfid, const struct lu_name *sname) { struct changelog_ext_rename *rnm = changelog_rec_rename(rec); size_t extsize = sname->ln_namelen + 1; LASSERT(sfid != NULL); LASSERT(spfid != NULL); LASSERT(sname != NULL); rnm->cr_sfid = *sfid; rnm->cr_spfid = *spfid; changelog_rec_name(rec)[rec->cr_namelen] = '\0'; strlcpy(changelog_rec_sname(rec), sname->ln_name, extsize); rec->cr_namelen += extsize; } void mdd_changelog_rec_ext_jobid(struct changelog_rec *rec, const char *jobid) { struct changelog_ext_jobid *jid = changelog_rec_jobid(rec); if (jobid == NULL || jobid[0] == '\0') return; strlcpy(jid->cr_jobid, jobid, sizeof(jid->cr_jobid)); } /** Store a namespace change changelog record * If this fails, we must fail the whole transaction; we don't * want the change to commit without the log entry. * \param target - mdd_object of change * \param tpfid - target parent dir/object fid * \param sfid - source object fid * \param spfid - source parent fid * \param tname - target name string * \param sname - source name string * \param handle - transacion handle */ int mdd_changelog_ns_store(const struct lu_env *env, struct mdd_device *mdd, enum changelog_rec_type type, enum changelog_rec_flags crf, struct mdd_object *target, const struct lu_fid *tpfid, const struct lu_fid *sfid, const struct lu_fid *spfid, const struct lu_name *tname, const struct lu_name *sname, struct thandle *handle) { const struct lu_ucred *uc = lu_ucred(env); struct llog_changelog_rec *rec; struct lu_buf *buf; int reclen; int rc; ENTRY; /* Not recording */ if (!(mdd->mdd_cl.mc_flags & CLM_ON)) RETURN(0); if ((mdd->mdd_cl.mc_mask & (1 << type)) == 0) RETURN(0); LASSERT(tpfid != NULL); LASSERT(tname != NULL); LASSERT(handle != NULL); reclen = mdd_llog_record_calc_size(env, tname, sname); buf = lu_buf_check_and_alloc(&mdd_env_info(env)->mti_big_buf, reclen); if (buf->lb_buf == NULL) RETURN(-ENOMEM); rec = buf->lb_buf; crf &= CLF_FLAGMASK; if (uc != NULL && uc->uc_jobid[0] != '\0') crf |= CLF_JOBID; if (sname != NULL) crf |= CLF_RENAME; else crf |= CLF_VERSION; rec->cr.cr_flags = crf; rec->cr.cr_type = (__u32)type; rec->cr.cr_pfid = *tpfid; rec->cr.cr_namelen = tname->ln_namelen; memcpy(changelog_rec_name(&rec->cr), tname->ln_name, tname->ln_namelen); if (crf & CLF_RENAME) mdd_changelog_rec_ext_rename(&rec->cr, sfid, spfid, sname); if (crf & CLF_JOBID) mdd_changelog_rec_ext_jobid(&rec->cr, uc->uc_jobid); if (likely(target != NULL)) { rec->cr.cr_tfid = *mdo2fid(target); target->mod_cltime = cfs_time_current_64(); } else { fid_zero(&rec->cr.cr_tfid); } rc = mdd_changelog_store(env, mdd, rec, handle); if (rc < 0) { CERROR("changelog failed: rc=%d, op%d %s c"DFID" p"DFID"\n", rc, type, tname->ln_name, PFID(sfid), PFID(tpfid)); return -EFAULT; } return 0; } static int __mdd_links_add(const struct lu_env *env, struct mdd_object *mdd_obj, struct linkea_data *ldata, const struct lu_name *lname, const struct lu_fid *pfid, int first, int check) { int rc; if (ldata->ld_leh == NULL) { rc = first ? -ENODATA : mdd_links_read(env, mdd_obj, ldata); if (rc) { if (rc != -ENODATA) return rc; rc = linkea_data_new(ldata, &mdd_env_info(env)->mti_link_buf); if (rc) return rc; } } if (check) { rc = linkea_links_find(ldata, lname, pfid); if (rc && rc != -ENOENT) return rc; if (rc == 0) return -EEXIST; } if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_LINKEA_MORE)) { struct lu_fid *tfid = &mdd_env_info(env)->mti_fid2; *tfid = *pfid; tfid->f_ver = ~0; linkea_add_buf(ldata, lname, tfid); } if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_LINKEA_MORE2)) linkea_add_buf(ldata, lname, pfid); return linkea_add_buf(ldata, lname, pfid); } static int __mdd_links_del(const struct lu_env *env, struct mdd_object *mdd_obj, struct linkea_data *ldata, const struct lu_name *lname, const struct lu_fid *pfid) { int rc; if (ldata->ld_leh == NULL) { rc = mdd_links_read(env, mdd_obj, ldata); if (rc) return rc; } rc = linkea_links_find(ldata, lname, pfid); if (rc) return rc; linkea_del_buf(ldata, lname); return 0; } static int mdd_linkea_prepare(const struct lu_env *env, struct mdd_object *mdd_obj, const struct lu_fid *oldpfid, const struct lu_name *oldlname, const struct lu_fid *newpfid, const struct lu_name *newlname, int first, int check, struct linkea_data *ldata) { int rc = 0; int rc2 = 0; ENTRY; if (OBD_FAIL_CHECK(OBD_FAIL_FID_IGIF)) return 0; LASSERT(oldpfid != NULL || newpfid != NULL); if (mdd_obj->mod_flags & DEAD_OBJ) { /* Prevent linkea to be updated which is NOT necessary. */ ldata->ld_reclen = 0; /* No more links, don't bother */ RETURN(0); } if (oldpfid != NULL) { rc = __mdd_links_del(env, mdd_obj, ldata, oldlname, oldpfid); if (rc) { if ((check == 1) || (rc != -ENODATA && rc != -ENOENT)) RETURN(rc); /* No changes done. */ rc = 0; } } /* If renaming, add the new record */ if (newpfid != NULL) { /* even if the add fails, we still delete the out-of-date * old link */ rc2 = __mdd_links_add(env, mdd_obj, ldata, newlname, newpfid, first, check); } rc = rc != 0 ? rc : rc2; RETURN(rc); } int mdd_links_rename(const struct lu_env *env, struct mdd_object *mdd_obj, const struct lu_fid *oldpfid, const struct lu_name *oldlname, const struct lu_fid *newpfid, const struct lu_name *newlname, struct thandle *handle, struct linkea_data *ldata, int first, int check) { int rc = 0; ENTRY; if (ldata == NULL) { ldata = &mdd_env_info(env)->mti_link_data; memset(ldata, 0, sizeof(*ldata)); rc = mdd_linkea_prepare(env, mdd_obj, oldpfid, oldlname, newpfid, newlname, first, check, ldata); if (rc != 0) GOTO(out, rc); } if (ldata->ld_reclen != 0) rc = mdd_links_write(env, mdd_obj, ldata, handle); EXIT; out: if (rc != 0) { int error = 1; if (rc == -EOVERFLOW || rc == -ENOSPC) error = 0; if (oldpfid == NULL) CDEBUG(error ? D_ERROR : D_OTHER, "link_ea add '%.*s' failed %d "DFID"\n", newlname->ln_namelen, newlname->ln_name, rc, PFID(mdd_object_fid(mdd_obj))); else if (newpfid == NULL) CDEBUG(error ? D_ERROR : D_OTHER, "link_ea del '%.*s' failed %d "DFID"\n", oldlname->ln_namelen, oldlname->ln_name, rc, PFID(mdd_object_fid(mdd_obj))); else CDEBUG(error ? D_ERROR : D_OTHER, "link_ea rename '%.*s'->'%.*s' failed %d " DFID"\n", oldlname->ln_namelen, oldlname->ln_name, newlname->ln_namelen, newlname->ln_name, rc, PFID(mdd_object_fid(mdd_obj))); } if (ldata->ld_buf && ldata->ld_buf->lb_len > OBD_ALLOC_BIG) /* if we vmalloced a large buffer drop it */ lu_buf_free(ldata->ld_buf); return rc; } static inline int mdd_links_add(const struct lu_env *env, struct mdd_object *mdd_obj, const struct lu_fid *pfid, const struct lu_name *lname, struct thandle *handle, struct linkea_data *ldata, int first) { return mdd_links_rename(env, mdd_obj, NULL, NULL, pfid, lname, handle, ldata, first, 0); } static inline int mdd_links_del(const struct lu_env *env, struct mdd_object *mdd_obj, const struct lu_fid *pfid, const struct lu_name *lname, struct thandle *handle) { return mdd_links_rename(env, mdd_obj, pfid, lname, NULL, NULL, handle, NULL, 0, 0); } /** Read the link EA into a temp buffer. * Uses the mdd_thread_info::mti_big_buf since it is generally large. * A pointer to the buffer is stored in \a ldata::ld_buf. * * \retval 0 or error */ int mdd_links_read(const struct lu_env *env, struct mdd_object *mdd_obj, struct linkea_data *ldata) { int rc; if (!mdd_object_exists(mdd_obj)) return -ENODATA; /* First try a small buf */ LASSERT(env != NULL); ldata->ld_buf = lu_buf_check_and_alloc(&mdd_env_info(env)->mti_link_buf, PAGE_CACHE_SIZE); if (ldata->ld_buf->lb_buf == NULL) return -ENOMEM; rc = mdo_xattr_get(env, mdd_obj, ldata->ld_buf, XATTR_NAME_LINK); if (rc == -ERANGE) { /* Buf was too small, figure out what we need. */ lu_buf_free(ldata->ld_buf); rc = mdo_xattr_get(env, mdd_obj, ldata->ld_buf, XATTR_NAME_LINK); if (rc < 0) return rc; ldata->ld_buf = lu_buf_check_and_alloc(ldata->ld_buf, rc); if (ldata->ld_buf->lb_buf == NULL) return -ENOMEM; rc = mdo_xattr_get(env, mdd_obj, ldata->ld_buf, XATTR_NAME_LINK); } if (rc < 0) { lu_buf_free(ldata->ld_buf); ldata->ld_buf = NULL; return rc; } return linkea_init(ldata); } /** Read the link EA into a temp buffer. * Uses the name_buf since it is generally large. * \retval IS_ERR err * \retval ptr to \a lu_buf (always \a mti_big_buf) */ struct lu_buf *mdd_links_get(const struct lu_env *env, struct mdd_object *mdd_obj) { struct linkea_data ldata = { NULL }; int rc; rc = mdd_links_read(env, mdd_obj, &ldata); return rc ? ERR_PTR(rc) : ldata.ld_buf; } int mdd_links_write(const struct lu_env *env, struct mdd_object *mdd_obj, struct linkea_data *ldata, struct thandle *handle) { const struct lu_buf *buf = mdd_buf_get_const(env, ldata->ld_buf->lb_buf, ldata->ld_leh->leh_len); int rc; if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_NO_LINKEA)) return 0; rc = mdo_xattr_set(env, mdd_obj, buf, XATTR_NAME_LINK, 0, handle); if (unlikely(rc == -ENOSPC) && S_ISREG(mdd_object_type(mdd_obj)) && mdd_object_remote(mdd_obj) == 0) { struct lfsck_request *lr = &mdd_env_info(env)->mti_lr; struct thandle *sub_th; /* XXX: If the linkEA is overflow, then we need to notify the * namespace LFSCK to skip "nlink" attribute verification * on this object to avoid the "nlink" to be shrinked by * wrong. It may be not good an interaction with LFSCK * like this. We will consider to replace it with other * mechanism in future. LU-5802. */ lfsck_pack_rfa(lr, mdo2fid(mdd_obj), LE_SKIP_NLINK, LFSCK_TYPE_NAMESPACE); sub_th = thandle_get_sub_by_dt(env, handle, mdo2mdd(&mdd_obj->mod_obj)->mdd_bottom); lfsck_in_notify(env, mdo2mdd(&mdd_obj->mod_obj)->mdd_bottom, lr, sub_th); } return rc; } int mdd_declare_links_add(const struct lu_env *env, struct mdd_object *mdd_obj, struct thandle *handle, struct linkea_data *ldata, enum mdd_links_add_overflow overflow) { int rc; int ea_len; void *linkea; if (ldata != NULL && ldata->ld_leh != NULL) { ea_len = ldata->ld_leh->leh_len; linkea = ldata->ld_buf->lb_buf; } else { ea_len = DEFAULT_LINKEA_SIZE; linkea = NULL; } /* XXX: max size? */ rc = mdo_declare_xattr_set(env, mdd_obj, mdd_buf_get_const(env, linkea, ea_len), XATTR_NAME_LINK, 0, handle); if (rc != 0) return rc; if (mdd_object_remote(mdd_obj) == 0 && overflow == MLAO_CHECK) { struct lfsck_request *lr = &mdd_env_info(env)->mti_lr; struct thandle *sub_th; /* XXX: If the linkEA is overflow, then we need to notify the * namespace LFSCK to skip "nlink" attribute verification * on this object to avoid the "nlink" to be shrinked by * wrong. It may be not good an interaction with LFSCK * like this. We will consider to replace it with other * mechanism in future. LU-5802. */ lfsck_pack_rfa(lr, mdo2fid(mdd_obj), LE_SKIP_NLINK_DECLARE, LFSCK_TYPE_NAMESPACE); sub_th = thandle_get_sub_by_dt(env, handle, mdo2mdd(&mdd_obj->mod_obj)->mdd_bottom); rc = lfsck_in_notify(env, mdo2mdd(&mdd_obj->mod_obj)->mdd_bottom, lr, sub_th); } return rc; } static inline int mdd_declare_links_del(const struct lu_env *env, struct mdd_object *c, struct thandle *handle) { int rc = 0; /* For directory, the linkEA will be removed together * with the object. */ if (!S_ISDIR(mdd_object_type(c))) rc = mdd_declare_links_add(env, c, handle, NULL, MLAO_IGNORE); return rc; } static int mdd_declare_link(const struct lu_env *env, struct mdd_device *mdd, struct mdd_object *p, struct mdd_object *c, const struct lu_name *name, struct thandle *handle, struct lu_attr *la, struct linkea_data *data) { int rc; rc = mdo_declare_index_insert(env, p, mdo2fid(c), mdd_object_type(c), name->ln_name, handle); if (rc != 0) return rc; rc = mdo_declare_ref_add(env, c, handle); if (rc != 0) return rc; if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_MORE_NLINK)) { rc = mdo_declare_ref_add(env, c, handle); if (rc != 0) return rc; } la->la_valid = LA_CTIME | LA_MTIME; rc = mdo_declare_attr_set(env, p, la, handle); if (rc != 0) return rc; la->la_valid = LA_CTIME; rc = mdo_declare_attr_set(env, c, la, handle); if (rc != 0) return rc; rc = mdd_declare_links_add(env, c, handle, data, S_ISREG(mdd_object_type(c)) ? MLAO_CHECK : MLAO_IGNORE); if (rc != 0) return rc; rc = mdd_declare_changelog_store(env, mdd, name, NULL, handle); return rc; } static int 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) { const char *name = lname->ln_name; struct lu_attr *la = &mdd_env_info(env)->mti_la_for_fix; struct mdd_object *mdd_tobj = md2mdd_obj(tgt_obj); struct mdd_object *mdd_sobj = md2mdd_obj(src_obj); struct lu_attr *cattr = MDD_ENV_VAR(env, cattr); struct lu_attr *tattr = MDD_ENV_VAR(env, tattr); struct mdd_device *mdd = mdo2mdd(src_obj); struct thandle *handle; struct linkea_data *ldata = &mdd_env_info(env)->mti_link_data; int rc; ENTRY; rc = mdd_la_get(env, mdd_sobj, cattr); if (rc != 0) RETURN(rc); rc = mdd_la_get(env, mdd_tobj, tattr); if (rc != 0) RETURN(rc); handle = mdd_trans_create(env, mdd); if (IS_ERR(handle)) GOTO(out_pending, rc = PTR_ERR(handle)); memset(ldata, 0, sizeof(*ldata)); LASSERT(ma->ma_attr.la_valid & LA_CTIME); la->la_ctime = la->la_mtime = ma->ma_attr.la_ctime; rc = mdd_declare_link(env, mdd, mdd_tobj, mdd_sobj, lname, handle, la, ldata); if (rc) GOTO(stop, rc); rc = mdd_trans_start(env, mdd, handle); if (rc) GOTO(stop, rc); mdd_write_lock(env, mdd_sobj, MOR_TGT_CHILD); rc = mdd_link_sanity_check(env, mdd_tobj, tattr, lname, mdd_sobj, cattr); if (rc) GOTO(out_unlock, rc); if (!OBD_FAIL_CHECK(OBD_FAIL_LFSCK_LESS_NLINK)) { rc = mdo_ref_add(env, mdd_sobj, handle); if (rc != 0) GOTO(out_unlock, rc); } if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_MORE_NLINK)) { rc = mdo_ref_add(env, mdd_sobj, handle); if (rc != 0) GOTO(out_unlock, rc); } if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_DANGLING3)) { struct lu_fid tfid = *mdo2fid(mdd_sobj); tfid.f_oid++; rc = __mdd_index_insert_only(env, mdd_tobj, &tfid, mdd_object_type(mdd_sobj), name, handle); } else { rc = __mdd_index_insert_only(env, mdd_tobj, mdo2fid(mdd_sobj), mdd_object_type(mdd_sobj), name, handle); } if (rc != 0) { mdo_ref_del(env, mdd_sobj, handle); GOTO(out_unlock, rc); } la->la_valid = LA_CTIME | LA_MTIME; rc = mdd_update_time(env, mdd_tobj, tattr, la, handle); if (rc) GOTO(out_unlock, rc); la->la_valid = LA_CTIME; rc = mdd_update_time(env, mdd_sobj, cattr, la, handle); if (rc == 0) { rc = mdd_linkea_prepare(env, mdd_sobj, NULL, NULL, mdo2fid(mdd_tobj), lname, 0, 0, ldata); if (rc == 0) mdd_links_add(env, mdd_sobj, mdo2fid(mdd_tobj), lname, handle, ldata, 0); /* The failure of links_add should not cause the link * failure, reset rc here */ rc = 0; } EXIT; out_unlock: mdd_write_unlock(env, mdd_sobj); if (rc == 0) rc = mdd_changelog_ns_store(env, mdd, CL_HARDLINK, 0, mdd_sobj, mdo2fid(mdd_tobj), NULL, NULL, lname, NULL, handle); stop: mdd_trans_stop(env, mdd, rc, handle); if (ldata->ld_buf && ldata->ld_buf->lb_len > OBD_ALLOC_BIG) /* if we vmalloced a large buffer drop it */ lu_buf_free(ldata->ld_buf); out_pending: return rc; } static int mdd_mark_dead_object(const struct lu_env *env, struct mdd_object *obj, struct thandle *handle, bool declare) { struct lu_attr *attr = MDD_ENV_VAR(env, la_for_start); int rc; if (!declare) obj->mod_flags |= DEAD_OBJ; if (!S_ISDIR(mdd_object_type(obj))) return 0; attr->la_valid = LA_FLAGS; attr->la_flags = LUSTRE_SLAVE_DEAD_FL; if (declare) rc = mdo_declare_attr_set(env, obj, attr, handle); else rc = mdo_attr_set(env, obj, attr, handle); return rc; } static int mdd_declare_finish_unlink(const struct lu_env *env, struct mdd_object *obj, struct thandle *handle) { int rc; rc = mdd_mark_dead_object(env, obj, handle, true); if (rc != 0) return rc; rc = orph_declare_index_insert(env, obj, mdd_object_type(obj), handle); if (rc != 0) return rc; rc = mdo_declare_destroy(env, obj, handle); if (rc != 0) return rc; return mdd_declare_links_del(env, obj, handle); } /* caller should take a lock before calling */ int mdd_finish_unlink(const struct lu_env *env, struct mdd_object *obj, struct md_attr *ma, const struct mdd_object *pobj, const struct lu_name *lname, struct thandle *th) { int rc = 0; int is_dir = S_ISDIR(ma->ma_attr.la_mode); ENTRY; LASSERT(mdd_write_locked(env, obj) != 0); if (ma->ma_attr.la_nlink == 0 || is_dir) { rc = mdd_mark_dead_object(env, obj, th, false); if (rc != 0) RETURN(rc); /* add new orphan and the object * will be deleted during mdd_close() */ if (obj->mod_count) { rc = __mdd_orphan_add(env, obj, th); if (rc == 0) CDEBUG(D_HA, "Object "DFID" is inserted into " "orphan list, open count = %d\n", PFID(mdd_object_fid(obj)), obj->mod_count); else CERROR("Object "DFID" fail to be an orphan, " "open count = %d, maybe cause failed " "open replay\n", PFID(mdd_object_fid(obj)), obj->mod_count); } else { rc = mdo_destroy(env, obj, th); } } else if (!is_dir) { /* old files may not have link ea; ignore errors */ mdd_links_del(env, obj, mdo2fid(pobj), lname, th); } RETURN(rc); } /* * pobj maybe NULL * has mdd_write_lock on cobj already, but not on pobj yet */ int mdd_unlink_sanity_check(const struct lu_env *env, struct mdd_object *pobj, const struct lu_attr *pattr, struct mdd_object *cobj, const struct lu_attr *cattr) { int rc; ENTRY; rc = mdd_may_delete(env, pobj, pattr, cobj, cattr, NULL, 1, 1); RETURN(rc); } static int mdd_declare_unlink(const struct lu_env *env, struct mdd_device *mdd, struct mdd_object *p, struct mdd_object *c, const struct lu_name *name, struct md_attr *ma, struct thandle *handle, int no_name, int is_dir) { struct lu_attr *la = &mdd_env_info(env)->mti_la_for_fix; int rc; if (!OBD_FAIL_CHECK(OBD_FAIL_LFSCK_DANGLING2)) { if (likely(no_name == 0)) { rc = mdo_declare_index_delete(env, p, name->ln_name, handle); if (rc != 0) return rc; } if (is_dir != 0) { rc = mdo_declare_ref_del(env, p, handle); if (rc != 0) return rc; } } LASSERT(ma->ma_attr.la_valid & LA_CTIME); la->la_ctime = la->la_mtime = ma->ma_attr.la_ctime; la->la_valid = LA_CTIME | LA_MTIME; rc = mdo_declare_attr_set(env, p, la, handle); if (rc) return rc; if (c != NULL) { rc = mdo_declare_ref_del(env, c, handle); if (rc) return rc; rc = mdo_declare_ref_del(env, c, handle); if (rc) return rc; la->la_valid = LA_CTIME; rc = mdo_declare_attr_set(env, c, la, handle); if (rc) return rc; rc = mdd_declare_finish_unlink(env, c, handle); if (rc) return rc; /* FIXME: need changelog for remove entry */ rc = mdd_declare_changelog_store(env, mdd, name, NULL, handle); } return rc; } /* * test if a file has an HSM archive * if HSM attributes are not found in ma update them from * HSM xattr */ static bool mdd_hsm_archive_exists(const struct lu_env *env, struct mdd_object *obj, struct md_attr *ma) { ENTRY; if (!(ma->ma_valid & MA_HSM)) { /* no HSM MD provided, read xattr */ struct lu_buf *hsm_buf; const size_t buflen = sizeof(struct hsm_attrs); int rc; hsm_buf = mdd_buf_get(env, NULL, 0); lu_buf_alloc(hsm_buf, buflen); rc = mdo_xattr_get(env, obj, hsm_buf, XATTR_NAME_HSM); rc = lustre_buf2hsm(hsm_buf->lb_buf, rc, &ma->ma_hsm); lu_buf_free(hsm_buf); if (rc < 0) RETURN(false); ma->ma_valid = MA_HSM; } if (ma->ma_hsm.mh_flags & HS_EXISTS) RETURN(true); RETURN(false); } /** * Delete name entry and the object. * Note: no_name == 1 means it only destory the object, i.e. name_entry * does not exist for this object, and it could only happen during resending * of remote unlink. see the comments in mdt_reint_unlink. Unfortunately, lname * is also needed in this case(needed by changelog), so we have to add another * parameter(no_name)here. XXX: this is only needed in DNE phase I, on Phase II, * the ENOENT failure should be able to be fixed by redo mechanism. */ static int mdd_unlink(const struct lu_env *env, struct md_object *pobj, struct md_object *cobj, const struct lu_name *lname, struct md_attr *ma, int no_name) { const char *name = lname->ln_name; struct lu_attr *pattr = MDD_ENV_VAR(env, pattr); struct lu_attr *cattr = MDD_ENV_VAR(env, cattr); struct lu_attr *la = &mdd_env_info(env)->mti_la_for_fix; struct mdd_object *mdd_pobj = md2mdd_obj(pobj); struct mdd_object *mdd_cobj = NULL; struct mdd_device *mdd = mdo2mdd(pobj); struct thandle *handle; int rc, is_dir = 0; ENTRY; /* cobj == NULL means only delete name entry */ if (likely(cobj != NULL)) { mdd_cobj = md2mdd_obj(cobj); if (mdd_object_exists(mdd_cobj) == 0) RETURN(-ENOENT); } rc = mdd_la_get(env, mdd_pobj, pattr); if (rc) RETURN(rc); if (likely(mdd_cobj != NULL)) { /* fetch cattr */ rc = mdd_la_get(env, mdd_cobj, cattr); if (rc) RETURN(rc); is_dir = S_ISDIR(cattr->la_mode); } rc = mdd_unlink_sanity_check(env, mdd_pobj, pattr, mdd_cobj, cattr); if (rc) RETURN(rc); handle = mdd_trans_create(env, mdd); if (IS_ERR(handle)) RETURN(PTR_ERR(handle)); rc = mdd_declare_unlink(env, mdd, mdd_pobj, mdd_cobj, lname, ma, handle, no_name, is_dir); if (rc) GOTO(stop, rc); rc = mdd_trans_start(env, mdd, handle); if (rc) GOTO(stop, rc); if (likely(mdd_cobj != NULL)) mdd_write_lock(env, mdd_cobj, MOR_TGT_CHILD); if (likely(no_name == 0) && !OBD_FAIL_CHECK(OBD_FAIL_LFSCK_DANGLING2)) { rc = __mdd_index_delete(env, mdd_pobj, name, is_dir, handle); if (rc) GOTO(cleanup, rc); } if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_MUL_REF) || OBD_FAIL_CHECK(OBD_FAIL_LFSCK_NO_NAMEENTRY)) GOTO(cleanup, rc = 0); if (likely(mdd_cobj != NULL)) { rc = mdo_ref_del(env, mdd_cobj, handle); if (rc != 0) { __mdd_index_insert_only(env, mdd_pobj, mdo2fid(mdd_cobj), mdd_object_type(mdd_cobj), name, handle); GOTO(cleanup, rc); } if (is_dir) /* unlink dot */ mdo_ref_del(env, mdd_cobj, handle); /* fetch updated nlink */ rc = mdd_la_get(env, mdd_cobj, cattr); if (rc) GOTO(cleanup, rc); } LASSERT(ma->ma_attr.la_valid & LA_CTIME); la->la_ctime = la->la_mtime = ma->ma_attr.la_ctime; la->la_valid = LA_CTIME | LA_MTIME; rc = mdd_update_time(env, mdd_pobj, pattr, la, handle); if (rc) GOTO(cleanup, rc); /* Enough for only unlink the entry */ if (unlikely(mdd_cobj == NULL)) GOTO(stop, rc); if (cattr->la_nlink > 0 || mdd_cobj->mod_count > 0) { /* update ctime of an unlinked file only if it is still * opened or a link still exists */ la->la_valid = LA_CTIME; rc = mdd_update_time(env, mdd_cobj, cattr, la, handle); if (rc) GOTO(cleanup, rc); } /* XXX: this transfer to ma will be removed with LOD/OSP */ ma->ma_attr = *cattr; ma->ma_valid |= MA_INODE; rc = mdd_finish_unlink(env, mdd_cobj, ma, mdd_pobj, lname, handle); /* fetch updated nlink */ if (rc == 0) rc = mdd_la_get(env, mdd_cobj, cattr); /* if object is removed then we can't get its attrs, use last get */ if (cattr->la_nlink == 0) { ma->ma_attr = *cattr; ma->ma_valid |= MA_INODE; } EXIT; cleanup: if (likely(mdd_cobj != NULL)) mdd_write_unlock(env, mdd_cobj); if (rc == 0) { int cl_flags = 0; if (cattr->la_nlink == 0) { cl_flags |= CLF_UNLINK_LAST; /* search for an existing archive */ if (mdd_hsm_archive_exists(env, mdd_cobj, ma)) cl_flags |= CLF_UNLINK_HSM_EXISTS; } rc = mdd_changelog_ns_store(env, mdd, is_dir ? CL_RMDIR : CL_UNLINK, cl_flags, mdd_cobj, mdo2fid(mdd_pobj), NULL, NULL, lname, NULL, handle); } stop: mdd_trans_stop(env, mdd, rc, handle); return rc; } /* * The permission has been checked when obj created, no need check again. */ static int mdd_cd_sanity_check(const struct lu_env *env, struct mdd_object *obj) { ENTRY; /* EEXIST check */ if (!obj || mdd_is_dead_obj(obj)) RETURN(-ENOENT); RETURN(0); } static int mdd_create_data(const struct lu_env *env, struct md_object *pobj, struct md_object *cobj, const struct md_op_spec *spec, struct md_attr *ma) { struct mdd_device *mdd = mdo2mdd(cobj); struct mdd_object *mdd_pobj = md2mdd_obj(pobj); struct mdd_object *son = md2mdd_obj(cobj); struct thandle *handle; const struct lu_buf *buf; struct lu_attr *attr = MDD_ENV_VAR(env, cattr); struct dt_allocation_hint *hint = &mdd_env_info(env)->mti_hint; int rc; ENTRY; rc = mdd_cd_sanity_check(env, son); if (rc) RETURN(rc); if (!md_should_create(spec->sp_cr_flags)) RETURN(0); /* * there are following use cases for this function: * 1) late striping - file was created with MDS_OPEN_DELAY_CREATE * striping can be specified or not * 2) CMD? */ rc = mdd_la_get(env, son, attr); if (rc) RETURN(rc); /* calling ->ah_make_hint() is used to transfer information from parent */ mdd_object_make_hint(env, mdd_pobj, son, attr, spec, hint); handle = mdd_trans_create(env, mdd); if (IS_ERR(handle)) GOTO(out_free, rc = PTR_ERR(handle)); /* * XXX: Setting the lov ea is not locked but setting the attr is locked? * Should this be fixed? */ CDEBUG(D_OTHER, "ea %p/%u, cr_flags "LPO64", no_create %u\n", spec->u.sp_ea.eadata, spec->u.sp_ea.eadatalen, spec->sp_cr_flags, spec->no_create); if (spec->no_create || (spec->sp_cr_flags & MDS_OPEN_HAS_EA)) { buf = mdd_buf_get_const(env, spec->u.sp_ea.eadata, spec->u.sp_ea.eadatalen); } else { buf = &LU_BUF_NULL; } rc = dt_declare_xattr_set(env, mdd_object_child(son), buf, XATTR_NAME_LOV, 0, handle); if (rc) GOTO(stop, rc); rc = mdd_declare_changelog_store(env, mdd, NULL, NULL, handle); if (rc) GOTO(stop, rc); rc = mdd_trans_start(env, mdd, handle); if (rc) GOTO(stop, rc); rc = dt_xattr_set(env, mdd_object_child(son), buf, XATTR_NAME_LOV, 0, handle); if (rc) GOTO(stop, rc); rc = mdd_changelog_data_store(env, mdd, CL_LAYOUT, 0, son, handle); stop: mdd_trans_stop(env, mdd, rc, handle); out_free: RETURN(rc); } static int mdd_declare_object_initialize(const struct lu_env *env, struct mdd_object *parent, struct mdd_object *child, struct lu_attr *attr, struct thandle *handle) { int rc; ENTRY; /* * inode mode has been set in creation time, and it's based on umask, * la_mode and acl, don't set here again! (which will go wrong * because below function doesn't consider umask). * I'd suggest set all object attributes in creation time, see above. */ LASSERT(attr->la_valid & (LA_MODE | LA_TYPE)); attr->la_valid &= ~(LA_MODE | LA_TYPE); rc = mdo_declare_attr_set(env, child, attr, handle); attr->la_valid |= LA_MODE | LA_TYPE; if (rc != 0 || !S_ISDIR(attr->la_mode)) RETURN(rc); rc = mdo_declare_index_insert(env, child, mdo2fid(child), S_IFDIR, dot, handle); if (rc != 0) RETURN(rc); rc = mdo_declare_ref_add(env, child, handle); if (rc != 0) RETURN(rc); rc = mdo_declare_index_insert(env, child, mdo2fid(parent), S_IFDIR, dotdot, handle); RETURN(rc); } static int mdd_object_initialize(const struct lu_env *env, const struct lu_fid *pfid, struct mdd_object *child, struct lu_attr *attr, struct thandle *handle, const struct md_op_spec *spec) { int rc = 0; ENTRY; if (S_ISDIR(attr->la_mode)) { /* Add "." and ".." for newly created dir */ mdo_ref_add(env, child, handle); rc = __mdd_index_insert_only(env, child, mdo2fid(child), S_IFDIR, dot, handle); if (rc == 0) rc = __mdd_index_insert_only(env, child, pfid, S_IFDIR, dotdot, handle); if (rc != 0) mdo_ref_del(env, child, handle); } RETURN(rc); } /** * This function checks whether it can create a file/dir under the * directory(@pobj). The directory(@pobj) is not being locked by * mdd lock. * * \param[in] env execution environment * \param[in] pobj the directory to create files * \param[in] pattr the attributes of the directory * \param[in] lname the name of the created file/dir * \param[in] cattr the attributes of the file/dir * \param[in] spec create specification * * \retval = 0 it is allowed to create file/dir under * the directory * \retval negative error not allowed to create file/dir * under the directory */ static int mdd_create_sanity_check(const struct lu_env *env, struct md_object *pobj, const struct lu_attr *pattr, const struct lu_name *lname, struct lu_attr *cattr, struct md_op_spec *spec) { struct mdd_thread_info *info = mdd_env_info(env); struct lu_fid *fid = &info->mti_fid; struct mdd_object *obj = md2mdd_obj(pobj); struct mdd_device *m = mdo2mdd(pobj); bool check_perm = true; int rc; ENTRY; /* EEXIST check */ if (mdd_is_dead_obj(obj)) RETURN(-ENOENT); /* * In some cases this lookup is not needed - we know before if name * exists or not because MDT performs lookup for it. * name length check is done in lookup. */ if (spec->sp_cr_lookup) { /* * Check if the name already exist, though it will be checked in * _index_insert also, for avoiding rolling back if exists * _index_insert. */ rc = __mdd_lookup(env, pobj, pattr, lname, fid, MAY_WRITE | MAY_EXEC); if (rc != -ENOENT) RETURN(rc ? : -EEXIST); /* Permission is already being checked in mdd_lookup */ check_perm = false; } rc = mdd_may_create(env, obj, pattr, NULL, check_perm); if (rc != 0) RETURN(rc); /* sgid check */ if (pattr->la_mode & S_ISGID) { cattr->la_gid = pattr->la_gid; if (S_ISDIR(cattr->la_mode)) { cattr->la_mode |= S_ISGID; cattr->la_valid |= LA_MODE; } } rc = mdd_name_check(m, lname); if (rc < 0) RETURN(rc); switch (cattr->la_mode & S_IFMT) { case S_IFLNK: { unsigned int symlen = strlen(spec->u.sp_symname) + 1; if (symlen > (1 << m->mdd_dt_conf.ddp_block_shift)) RETURN(-ENAMETOOLONG); else RETURN(0); } case S_IFDIR: case S_IFREG: case S_IFCHR: case S_IFBLK: case S_IFIFO: case S_IFSOCK: rc = 0; break; default: rc = -EINVAL; break; } RETURN(rc); } static int mdd_declare_object_create(const struct lu_env *env, struct mdd_device *mdd, struct mdd_object *p, struct mdd_object *c, struct lu_attr *attr, struct thandle *handle, const struct md_op_spec *spec, struct lu_buf *def_acl_buf, struct lu_buf *acl_buf, struct dt_allocation_hint *hint) { int rc; rc = mdd_declare_object_create_internal(env, p, c, attr, handle, spec, hint); if (rc) GOTO(out, rc); #ifdef CONFIG_FS_POSIX_ACL if (def_acl_buf->lb_len > 0 && S_ISDIR(attr->la_mode)) { /* if dir, then can inherit default ACl */ rc = mdo_declare_xattr_set(env, c, def_acl_buf, XATTR_NAME_ACL_DEFAULT, 0, handle); if (rc) GOTO(out, rc); } if (acl_buf->lb_len > 0) { rc = mdo_declare_attr_set(env, c, attr, handle); if (rc) GOTO(out, rc); rc = mdo_declare_xattr_set(env, c, acl_buf, XATTR_NAME_ACL_ACCESS, 0, handle); if (rc) GOTO(out, rc); } #endif rc = mdd_declare_object_initialize(env, p, c, attr, handle); if (rc) GOTO(out, rc); /* replay case, create LOV EA from client data */ if (spec->no_create || (spec->sp_cr_flags & MDS_OPEN_HAS_EA && S_ISREG(attr->la_mode))) { const struct lu_buf *buf; buf = mdd_buf_get_const(env, spec->u.sp_ea.eadata, spec->u.sp_ea.eadatalen); rc = mdo_declare_xattr_set(env, c, buf, XATTR_NAME_LOV, 0, handle); if (rc) GOTO(out, rc); } if (S_ISLNK(attr->la_mode)) { const char *target_name = spec->u.sp_symname; int sym_len = strlen(target_name); const struct lu_buf *buf; buf = mdd_buf_get_const(env, target_name, sym_len); rc = dt_declare_record_write(env, mdd_object_child(c), buf, 0, handle); if (rc) GOTO(out, rc); } out: return rc; } static int mdd_declare_create(const struct lu_env *env, struct mdd_device *mdd, struct mdd_object *p, struct mdd_object *c, const struct lu_name *name, struct lu_attr *attr, struct thandle *handle, const struct md_op_spec *spec, struct linkea_data *ldata, struct lu_buf *def_acl_buf, struct lu_buf *acl_buf, struct dt_allocation_hint *hint) { int rc; rc = mdd_declare_object_create(env, mdd, p, c, attr, handle, spec, def_acl_buf, acl_buf, hint); if (rc) GOTO(out, rc); if (S_ISDIR(attr->la_mode)) { rc = mdo_declare_ref_add(env, p, handle); if (rc) GOTO(out, rc); } if (unlikely(spec->sp_cr_flags & MDS_OPEN_VOLATILE)) { rc = orph_declare_index_insert(env, c, attr->la_mode, handle); if (rc) GOTO(out, rc); } else { struct lu_attr *la = &mdd_env_info(env)->mti_la_for_fix; rc = mdo_declare_index_insert(env, p, mdo2fid(c), attr->la_mode, name->ln_name, handle); if (rc != 0) return rc; rc = mdd_declare_links_add(env, c, handle, ldata, MLAO_IGNORE); if (rc) return rc; *la = *attr; la->la_valid = LA_CTIME | LA_MTIME; rc = mdo_declare_attr_set(env, p, la, handle); if (rc) return rc; rc = mdd_declare_changelog_store(env, mdd, name, NULL, handle); if (rc) return rc; } out: return rc; } static int mdd_acl_init(const struct lu_env *env, struct mdd_object *pobj, struct lu_attr *la, struct lu_buf *def_acl_buf, struct lu_buf *acl_buf) { int rc; ENTRY; if (S_ISLNK(la->la_mode)) { acl_buf->lb_len = 0; def_acl_buf->lb_len = 0; RETURN(0); } mdd_read_lock(env, pobj, MOR_TGT_PARENT); rc = mdo_xattr_get(env, pobj, def_acl_buf, XATTR_NAME_ACL_DEFAULT); mdd_read_unlock(env, pobj); if (rc > 0) { /* If there are default ACL, fix mode/ACL by default ACL */ def_acl_buf->lb_len = rc; LASSERT(def_acl_buf->lb_len <= acl_buf->lb_len); memcpy(acl_buf->lb_buf, def_acl_buf->lb_buf, rc); acl_buf->lb_len = rc; rc = __mdd_fix_mode_acl(env, acl_buf, &la->la_mode); if (rc < 0) RETURN(rc); } else if (rc == -ENODATA || rc == -EOPNOTSUPP) { /* If there are no default ACL, fix mode by mask */ struct lu_ucred *uc = lu_ucred(env); /* The create triggered by MDT internal events, such as * LFSCK reset, will not contain valid "uc". */ if (unlikely(uc != NULL)) la->la_mode &= ~uc->uc_umask; rc = 0; acl_buf->lb_len = 0; def_acl_buf->lb_len = 0; } RETURN(rc); } /** * Create a metadata object and initialize it, set acl, xattr. **/ static int mdd_object_create(const struct lu_env *env, struct mdd_object *pobj, struct mdd_object *son, struct lu_attr *attr, struct md_op_spec *spec, struct lu_buf *acl_buf, struct lu_buf *def_acl_buf, struct dt_allocation_hint *hint, struct thandle *handle) { int rc; mdd_write_lock(env, son, MOR_TGT_CHILD); rc = mdd_object_create_internal(env, NULL, son, attr, handle, spec, hint); if (rc) GOTO(unlock, rc); /* Note: In DNE phase I, for striped dir, though sub-stripes will be * created in declare phase, they also needs to be added to master * object as sub-directory entry. So it has to initialize the master * object, then set dir striped EA.(in mdo_xattr_set) */ rc = mdd_object_initialize(env, mdo2fid(pobj), son, attr, handle, spec); if (rc != 0) GOTO(err_destroy, rc); /* * in case of replay we just set LOVEA provided by the client * XXX: I think it would be interesting to try "old" way where * MDT calls this xattr_set(LOV) in a different transaction. * probably this way we code can be made better. */ /* During creation, there are only a few cases we need do xattr_set to * create stripes. * 1. regular file: see comments above. * 2. dir: inherit default striping or pool settings from parent. * 3. create striped directory with provided stripeEA. * 4. create striped directory because inherit default layout from the * parent. */ if (spec->no_create || (S_ISREG(attr->la_mode) && spec->sp_cr_flags & MDS_OPEN_HAS_EA) || S_ISDIR(attr->la_mode)) { const struct lu_buf *buf; buf = mdd_buf_get_const(env, spec->u.sp_ea.eadata, spec->u.sp_ea.eadatalen); rc = mdo_xattr_set(env, son, buf, S_ISDIR(attr->la_mode) ? XATTR_NAME_LMV : XATTR_NAME_LOV, 0, handle); if (rc != 0) GOTO(err_destroy, rc); } #ifdef CONFIG_FS_POSIX_ACL if (def_acl_buf != NULL && def_acl_buf->lb_len > 0 && S_ISDIR(attr->la_mode)) { /* set default acl */ rc = mdo_xattr_set(env, son, def_acl_buf, XATTR_NAME_ACL_DEFAULT, 0, handle); if (rc) GOTO(err_destroy, rc); } /* set its own acl */ if (acl_buf != NULL && acl_buf->lb_len > 0) { rc = mdo_xattr_set(env, son, acl_buf, XATTR_NAME_ACL_ACCESS, 0, handle); if (rc) GOTO(err_destroy, rc); } #endif if (S_ISLNK(attr->la_mode)) { struct lu_ucred *uc = lu_ucred_assert(env); struct dt_object *dt = mdd_object_child(son); const char *target_name = spec->u.sp_symname; int sym_len = strlen(target_name); const struct lu_buf *buf; loff_t pos = 0; buf = mdd_buf_get_const(env, target_name, sym_len); rc = dt->do_body_ops->dbo_write(env, dt, buf, &pos, handle, uc->uc_cap & CFS_CAP_SYS_RESOURCE_MASK); if (rc == sym_len) rc = 0; else GOTO(err_initlized, rc = -EFAULT); } err_initlized: if (unlikely(rc != 0)) { int rc2; if (S_ISDIR(attr->la_mode)) { /* Drop the reference, no need to delete "."/"..", * because the object to be destroied directly. */ rc2 = mdo_ref_del(env, son, handle); if (rc2 != 0) GOTO(unlock, rc); } rc2 = mdo_ref_del(env, son, handle); if (rc2 != 0) GOTO(unlock, rc); err_destroy: mdo_destroy(env, son, handle); } unlock: mdd_write_unlock(env, son); RETURN(rc); } /* * Create object and insert it into namespace. */ static int 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) { struct mdd_thread_info *info = mdd_env_info(env); struct lu_attr *la = &info->mti_la_for_fix; struct mdd_object *mdd_pobj = md2mdd_obj(pobj); struct mdd_object *son = md2mdd_obj(child); struct mdd_device *mdd = mdo2mdd(pobj); struct lu_attr *attr = &ma->ma_attr; struct thandle *handle; struct lu_attr *pattr = &info->mti_pattr; struct lu_buf acl_buf; struct lu_buf def_acl_buf; struct linkea_data *ldata = &info->mti_link_data; const char *name = lname->ln_name; struct dt_allocation_hint *hint = &mdd_env_info(env)->mti_hint; int rc; int rc2; ENTRY; /* * Two operations have to be performed: * * - an allocation of a new object (->do_create()), and * * - an insertion into a parent index (->dio_insert()). * * Due to locking, operation order is not important, when both are * successful, *but* error handling cases are quite different: * * - if insertion is done first, and following object creation fails, * insertion has to be rolled back, but this operation might fail * also leaving us with dangling index entry. * * - if creation is done first, is has to be undone if insertion * fails, leaving us with leaked space, which is neither good, nor * fatal. * * It seems that creation-first is simplest solution, but it is * sub-optimal in the frequent * * $ mkdir foo * $ mkdir foo * * case, because second mkdir is bound to create object, only to * destroy it immediately. * * To avoid this follow local file systems that do double lookup: * * 0. lookup -> -EEXIST (mdd_create_sanity_check()) * * 1. create (mdd_object_create_internal()) * * 2. insert (__mdd_index_insert(), lookup again) */ rc = mdd_la_get(env, mdd_pobj, pattr); if (rc != 0) RETURN(rc); /* Sanity checks before big job. */ rc = mdd_create_sanity_check(env, pobj, pattr, lname, attr, spec); if (rc) RETURN(rc); if (OBD_FAIL_CHECK(OBD_FAIL_MDS_DQACQ_NET)) GOTO(out_free, rc = -EINPROGRESS); handle = mdd_trans_create(env, mdd); if (IS_ERR(handle)) GOTO(out_free, rc = PTR_ERR(handle)); acl_buf.lb_buf = info->mti_xattr_buf; acl_buf.lb_len = sizeof(info->mti_xattr_buf); def_acl_buf.lb_buf = info->mti_key; def_acl_buf.lb_len = sizeof(info->mti_key); rc = mdd_acl_init(env, mdd_pobj, attr, &def_acl_buf, &acl_buf); if (rc < 0) GOTO(out_stop, rc); mdd_object_make_hint(env, mdd_pobj, son, attr, spec, hint); memset(ldata, 0, sizeof(*ldata)); if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_BAD_PARENT)) { struct lu_fid tfid = *mdd_object_fid(mdd_pobj); tfid.f_oid--; rc = mdd_linkea_prepare(env, son, NULL, NULL, &tfid, lname, 1, 0, ldata); } else { rc = mdd_linkea_prepare(env, son, NULL, NULL, mdd_object_fid(mdd_pobj), lname, 1, 0, ldata); } rc = mdd_declare_create(env, mdd, mdd_pobj, son, lname, attr, handle, spec, ldata, &def_acl_buf, &acl_buf, hint); if (rc) GOTO(out_stop, rc); rc = mdd_trans_start(env, mdd, handle); if (rc) GOTO(out_stop, rc); rc = mdd_object_create(env, mdd_pobj, son, attr, spec, &acl_buf, &def_acl_buf, hint, handle); if (rc != 0) GOTO(out_stop, rc); if (unlikely(spec->sp_cr_flags & MDS_OPEN_VOLATILE)) { mdd_write_lock(env, son, MOR_TGT_CHILD); rc = __mdd_orphan_add(env, son, handle); GOTO(out_volatile, rc); } else { rc = __mdd_index_insert(env, mdd_pobj, mdo2fid(son), attr->la_mode, name, handle); if (rc != 0) GOTO(err_created, rc); mdd_links_add(env, son, mdo2fid(mdd_pobj), lname, handle, ldata, 1); /* update parent directory mtime/ctime */ *la = *attr; la->la_valid = LA_CTIME | LA_MTIME; rc = mdd_update_time(env, mdd_pobj, pattr, la, handle); if (rc) GOTO(err_insert, rc); } EXIT; err_insert: if (rc != 0) { int rc2; if (spec->sp_cr_flags & MDS_OPEN_VOLATILE) rc2 = __mdd_orphan_del(env, son, handle); else rc2 = __mdd_index_delete(env, mdd_pobj, name, S_ISDIR(attr->la_mode), handle); if (rc2 != 0) goto out_stop; err_created: mdd_write_lock(env, son, MOR_TGT_CHILD); if (S_ISDIR(attr->la_mode)) { /* Drop the reference, no need to delete "."/"..", * because the object is to be destroyed directly. */ rc2 = mdo_ref_del(env, son, handle); if (rc2 != 0) { mdd_write_unlock(env, son); goto out_stop; } } out_volatile: /* For volatile files drop one link immediately, since there is * no filename in the namespace, and save any error returned. */ rc2 = mdo_ref_del(env, son, handle); if (rc2 != 0) { mdd_write_unlock(env, son); if (unlikely(rc == 0)) rc = rc2; goto out_stop; } /* Don't destroy the volatile object on success */ if (likely(rc != 0)) mdo_destroy(env, son, handle); mdd_write_unlock(env, son); } if (rc == 0 && fid_is_namespace_visible(mdo2fid(son)) && likely((spec->sp_cr_flags & MDS_OPEN_VOLATILE) == 0)) rc = mdd_changelog_ns_store(env, mdd, S_ISDIR(attr->la_mode) ? CL_MKDIR : S_ISREG(attr->la_mode) ? CL_CREATE : S_ISLNK(attr->la_mode) ? CL_SOFTLINK : CL_MKNOD, 0, son, mdo2fid(mdd_pobj), NULL, NULL, lname, NULL, handle); out_stop: rc2 = mdd_trans_stop(env, mdd, rc, handle); if (rc == 0) rc = rc2; out_free: if (ldata->ld_buf && ldata->ld_buf->lb_len > OBD_ALLOC_BIG) /* if we vmalloced a large buffer drop it */ lu_buf_free(ldata->ld_buf); /* The child object shouldn't be cached anymore */ if (rc) set_bit(LU_OBJECT_HEARD_BANSHEE, &child->mo_lu.lo_header->loh_flags); return rc; } /* * Get locks on parents in proper order * RETURN: < 0 - error, rename_order if successful */ enum rename_order { MDD_RN_SAME, MDD_RN_SRCTGT, MDD_RN_TGTSRC }; static int mdd_rename_order(const struct lu_env *env, struct mdd_device *mdd, struct mdd_object *src_pobj, const struct lu_attr *pattr, struct mdd_object *tgt_pobj) { /* order of locking, 1 - tgt-src, 0 - src-tgt*/ int rc; ENTRY; if (src_pobj == tgt_pobj) RETURN(MDD_RN_SAME); /* compared the parent child relationship of src_p&tgt_p */ if (lu_fid_eq(&mdd->mdd_root_fid, mdo2fid(src_pobj))){ rc = MDD_RN_SRCTGT; } else if (lu_fid_eq(&mdd->mdd_root_fid, mdo2fid(tgt_pobj))) { rc = MDD_RN_TGTSRC; } else { rc = mdd_is_parent(env, mdd, src_pobj, pattr, mdo2fid(tgt_pobj), NULL); if (rc == -EREMOTE) rc = 0; if (rc == 1) rc = MDD_RN_TGTSRC; else if (rc == 0) rc = MDD_RN_SRCTGT; } RETURN(rc); } /* has not mdd_write{read}_lock on any obj yet. */ static int mdd_rename_sanity_check(const struct lu_env *env, struct mdd_object *src_pobj, const struct lu_attr *pattr, struct mdd_object *tgt_pobj, const struct lu_attr *tpattr, struct mdd_object *sobj, const struct lu_attr *cattr, struct mdd_object *tobj, const struct lu_attr *tattr) { int rc = 0; ENTRY; /* XXX: when get here, sobj must NOT be NULL, * the other case has been processed in cld_rename * before mdd_rename and enable MDS_PERM_BYPASS. */ LASSERT(sobj); rc = mdd_may_delete(env, src_pobj, pattr, sobj, cattr, NULL, 1, 0); if (rc) RETURN(rc); /* XXX: when get here, "tobj == NULL" means tobj must * NOT exist (neither on remote MDS, such case has been * processed in cld_rename before mdd_rename and enable * MDS_PERM_BYPASS). * So check may_create, but not check may_unlink. */ if (tobj == NULL) rc = mdd_may_create(env, tgt_pobj, tpattr, NULL, (src_pobj != tgt_pobj)); else rc = mdd_may_delete(env, tgt_pobj, tpattr, tobj, tattr, cattr, (src_pobj != tgt_pobj), 1); if (!rc && !tobj && (src_pobj != tgt_pobj) && S_ISDIR(cattr->la_mode)) rc = __mdd_may_link(env, tgt_pobj, tpattr); RETURN(rc); } static int mdd_declare_rename(const struct lu_env *env, struct mdd_device *mdd, struct mdd_object *mdd_spobj, struct mdd_object *mdd_tpobj, struct mdd_object *mdd_sobj, struct mdd_object *mdd_tobj, const struct lu_name *tname, const struct lu_name *sname, struct md_attr *ma, struct linkea_data *ldata, struct thandle *handle) { struct lu_attr *la = &mdd_env_info(env)->mti_la_for_fix; int rc; LASSERT(ma->ma_attr.la_valid & LA_CTIME); la->la_ctime = la->la_mtime = ma->ma_attr.la_ctime; LASSERT(mdd_spobj); LASSERT(mdd_tpobj); LASSERT(mdd_sobj); /* name from source dir */ rc = mdo_declare_index_delete(env, mdd_spobj, sname->ln_name, handle); if (rc) return rc; /* .. from source child */ if (S_ISDIR(mdd_object_type(mdd_sobj))) { /* source child can be directory, * counted by source dir's nlink */ rc = mdo_declare_ref_del(env, mdd_spobj, handle); if (rc) return rc; if (mdd_spobj != mdd_tpobj) { rc = mdo_declare_index_delete(env, mdd_sobj, dotdot, handle); if (rc != 0) return rc; rc = mdo_declare_index_insert(env, mdd_sobj, mdo2fid(mdd_tpobj), S_IFDIR, dotdot, handle); if (rc != 0) return rc; } /* new target child can be directory, * counted by target dir's nlink */ rc = mdo_declare_ref_add(env, mdd_tpobj, handle); if (rc != 0) return rc; } la->la_valid = LA_CTIME | LA_MTIME; rc = mdo_declare_attr_set(env, mdd_spobj, la, handle); if (rc != 0) return rc; rc = mdo_declare_attr_set(env, mdd_tpobj, la, handle); if (rc != 0) return rc; la->la_valid = LA_CTIME; rc = mdo_declare_attr_set(env, mdd_sobj, la, handle); if (rc) return rc; rc = mdd_declare_links_add(env, mdd_sobj, handle, ldata, S_ISREG(mdd_object_type(mdd_sobj)) ? MLAO_CHECK : MLAO_IGNORE); if (rc) return rc; /* new name */ rc = mdo_declare_index_insert(env, mdd_tpobj, mdo2fid(mdd_sobj), mdd_object_type(mdd_sobj), tname->ln_name, handle); if (rc != 0) return rc; /* name from target dir (old name), we declare it unconditionally * as mdd_rename() calls delete unconditionally as well. so just * to balance declarations vs calls to change ... */ rc = mdo_declare_index_delete(env, mdd_tpobj, tname->ln_name, handle); if (rc) return rc; if (mdd_tobj && mdd_object_exists(mdd_tobj)) { /* delete target child in target parent directory */ rc = mdo_declare_ref_del(env, mdd_tobj, handle); if (rc) return rc; if (S_ISDIR(mdd_object_type(mdd_tobj))) { /* target child can be directory, * delete "." reference in target child directory */ rc = mdo_declare_ref_del(env, mdd_tobj, handle); if (rc) return rc; /* delete ".." reference in target parent directory */ rc = mdo_declare_ref_del(env, mdd_tpobj, handle); if (rc) return rc; } la->la_valid = LA_CTIME; rc = mdo_declare_attr_set(env, mdd_tobj, la, handle); if (rc) return rc; rc = mdd_declare_finish_unlink(env, mdd_tobj, handle); if (rc) return rc; } rc = mdd_declare_changelog_store(env, mdd, tname, sname, handle); if (rc) return rc; return rc; } /* src object can be remote that is why we use only fid and type of object */ static int 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) { const char *sname = lsname->ln_name; const char *tname = ltname->ln_name; struct lu_attr *la = &mdd_env_info(env)->mti_la_for_fix; struct mdd_object *mdd_spobj = md2mdd_obj(src_pobj); /* source parent */ struct mdd_object *mdd_tpobj = md2mdd_obj(tgt_pobj); struct mdd_device *mdd = mdo2mdd(src_pobj); struct mdd_object *mdd_sobj = NULL; /* source object */ struct mdd_object *mdd_tobj = NULL; struct lu_attr *cattr = MDD_ENV_VAR(env, cattr); struct lu_attr *pattr = MDD_ENV_VAR(env, pattr); struct lu_attr *tattr = MDD_ENV_VAR(env, tattr); struct lu_attr *tpattr = MDD_ENV_VAR(env, tpattr); struct thandle *handle; struct linkea_data *ldata = &mdd_env_info(env)->mti_link_data; const struct lu_fid *tpobj_fid = mdo2fid(mdd_tpobj); const struct lu_fid *spobj_fid = mdo2fid(mdd_spobj); bool is_dir; bool tobj_ref = 0; bool tobj_locked = 0; unsigned cl_flags = 0; int rc, rc2; ENTRY; if (tobj) mdd_tobj = md2mdd_obj(tobj); mdd_sobj = mdd_object_find(env, mdd, lf); rc = mdd_la_get(env, mdd_sobj, cattr); if (rc) GOTO(out_pending, rc); rc = mdd_la_get(env, mdd_spobj, pattr); if (rc) GOTO(out_pending, rc); if (mdd_tobj) { rc = mdd_la_get(env, mdd_tobj, tattr); if (rc) GOTO(out_pending, rc); } rc = mdd_la_get(env, mdd_tpobj, tpattr); if (rc) GOTO(out_pending, rc); rc = mdd_rename_sanity_check(env, mdd_spobj, pattr, mdd_tpobj, tpattr, mdd_sobj, cattr, mdd_tobj, tattr); if (rc) GOTO(out_pending, rc); rc = mdd_name_check(mdd, ltname); if (rc < 0) GOTO(out_pending, rc); handle = mdd_trans_create(env, mdd); if (IS_ERR(handle)) GOTO(out_pending, rc = PTR_ERR(handle)); memset(ldata, 0, sizeof(*ldata)); mdd_linkea_prepare(env, mdd_sobj, NULL, NULL, mdd_object_fid(mdd_tpobj), ltname, 1, 0, ldata); rc = mdd_declare_rename(env, mdd, mdd_spobj, mdd_tpobj, mdd_sobj, mdd_tobj, lsname, ltname, ma, ldata, handle); if (rc) GOTO(stop, rc); rc = mdd_trans_start(env, mdd, handle); if (rc) GOTO(stop, rc); /* FIXME: Should consider tobj and sobj too in rename_lock. */ rc = mdd_rename_order(env, mdd, mdd_spobj, pattr, mdd_tpobj); if (rc < 0) GOTO(cleanup_unlocked, rc); is_dir = S_ISDIR(cattr->la_mode); /* Remove source name from source directory */ rc = __mdd_index_delete(env, mdd_spobj, sname, is_dir, handle); if (rc) GOTO(cleanup, rc); /* "mv dir1 dir2" needs "dir1/.." link update */ if (is_dir && mdd_sobj && !lu_fid_eq(spobj_fid, tpobj_fid)) { rc = __mdd_index_delete_only(env, mdd_sobj, dotdot, handle); if (rc != 0) GOTO(fixup_spobj2, rc); rc = __mdd_index_insert_only(env, mdd_sobj, tpobj_fid, S_IFDIR, dotdot, handle); if (rc != 0) GOTO(fixup_spobj, rc); } /* Remove target name from target directory * Here tobj can be remote one, so we do index_delete unconditionally * and -ENOENT is allowed. */ rc = __mdd_index_delete(env, mdd_tpobj, tname, is_dir, handle); if (rc != 0) { if (mdd_tobj) { /* tname might been renamed to something else */ GOTO(fixup_spobj, rc); } if (rc != -ENOENT) GOTO(fixup_spobj, rc); } /* Insert new fid with target name into target dir */ rc = __mdd_index_insert(env, mdd_tpobj, lf, cattr->la_mode, tname, handle); if (rc != 0) GOTO(fixup_tpobj, rc); LASSERT(ma->ma_attr.la_valid & LA_CTIME); la->la_ctime = la->la_mtime = ma->ma_attr.la_ctime; /* XXX: mdd_sobj must be local one if it is NOT NULL. */ if (mdd_sobj) { la->la_valid = LA_CTIME; rc = mdd_update_time(env, mdd_sobj, cattr, la, handle); if (rc) GOTO(fixup_tpobj, rc); } /* Remove old target object * For tobj is remote case cmm layer has processed * and set tobj to NULL then. So when tobj is NOT NULL, * it must be local one. */ if (tobj && mdd_object_exists(mdd_tobj)) { mdd_write_lock(env, mdd_tobj, MOR_TGT_CHILD); tobj_locked = 1; if (mdd_is_dead_obj(mdd_tobj)) { /* shld not be dead, something is wrong */ CERROR("tobj is dead, something is wrong\n"); rc = -EINVAL; goto cleanup; } mdo_ref_del(env, mdd_tobj, handle); /* Remove dot reference. */ if (S_ISDIR(tattr->la_mode)) mdo_ref_del(env, mdd_tobj, handle); tobj_ref = 1; /* fetch updated nlink */ rc = mdd_la_get(env, mdd_tobj, tattr); if (rc != 0) { CERROR("%s: Failed to get nlink for tobj " DFID": rc = %d\n", mdd2obd_dev(mdd)->obd_name, PFID(tpobj_fid), rc); GOTO(fixup_tpobj, rc); } la->la_valid = LA_CTIME; rc = mdd_update_time(env, mdd_tobj, tattr, la, handle); if (rc != 0) { CERROR("%s: Failed to set ctime for tobj " DFID": rc = %d\n", mdd2obd_dev(mdd)->obd_name, PFID(tpobj_fid), rc); GOTO(fixup_tpobj, rc); } /* XXX: this transfer to ma will be removed with LOD/OSP */ ma->ma_attr = *tattr; ma->ma_valid |= MA_INODE; rc = mdd_finish_unlink(env, mdd_tobj, ma, mdd_tpobj, ltname, handle); if (rc != 0) { CERROR("%s: Failed to unlink tobj " DFID": rc = %d\n", mdd2obd_dev(mdd)->obd_name, PFID(tpobj_fid), rc); GOTO(fixup_tpobj, rc); } /* fetch updated nlink */ rc = mdd_la_get(env, mdd_tobj, tattr); if (rc != 0) { CERROR("%s: Failed to get nlink for tobj " DFID": rc = %d\n", mdd2obd_dev(mdd)->obd_name, PFID(tpobj_fid), rc); GOTO(fixup_tpobj, rc); } /* XXX: this transfer to ma will be removed with LOD/OSP */ ma->ma_attr = *tattr; ma->ma_valid |= MA_INODE; if (tattr->la_nlink == 0) { cl_flags |= CLF_RENAME_LAST; if (mdd_hsm_archive_exists(env, mdd_tobj, ma)) cl_flags |= CLF_RENAME_LAST_EXISTS; } } la->la_valid = LA_CTIME | LA_MTIME; rc = mdd_update_time(env, mdd_spobj, pattr, la, handle); if (rc) GOTO(fixup_tpobj, rc); if (mdd_spobj != mdd_tpobj) { la->la_valid = LA_CTIME | LA_MTIME; rc = mdd_update_time(env, mdd_tpobj, tpattr, la, handle); } if (rc == 0 && mdd_sobj) { mdd_write_lock(env, mdd_sobj, MOR_SRC_CHILD); rc = mdd_links_rename(env, mdd_sobj, mdo2fid(mdd_spobj), lsname, mdo2fid(mdd_tpobj), ltname, handle, NULL, 0, 0); if (rc == -ENOENT) /* Old files might not have EA entry */ mdd_links_add(env, mdd_sobj, mdo2fid(mdd_spobj), lsname, handle, NULL, 0); mdd_write_unlock(env, mdd_sobj); /* We don't fail the transaction if the link ea can't be updated -- fid2path will use alternate lookup method. */ rc = 0; } EXIT; fixup_tpobj: if (rc) { rc2 = __mdd_index_delete(env, mdd_tpobj, tname, is_dir, handle); if (rc2) CWARN("tp obj fix error %d\n",rc2); if (mdd_tobj && mdd_object_exists(mdd_tobj) && !mdd_is_dead_obj(mdd_tobj)) { if (tobj_ref) { mdo_ref_add(env, mdd_tobj, handle); if (is_dir) mdo_ref_add(env, mdd_tobj, handle); } rc2 = __mdd_index_insert(env, mdd_tpobj, mdo2fid(mdd_tobj), mdd_object_type(mdd_tobj), tname, handle); if (rc2 != 0) CWARN("tp obj fix error: rc = %d\n", rc2); } } fixup_spobj: if (rc && is_dir && mdd_sobj && mdd_spobj != mdd_tpobj) { rc2 = __mdd_index_delete_only(env, mdd_sobj, dotdot, handle); if (rc2) CWARN("%s: sp obj dotdot delete error: rc = %d\n", mdd2obd_dev(mdd)->obd_name, rc2); rc2 = __mdd_index_insert_only(env, mdd_sobj, spobj_fid, S_IFDIR, dotdot, handle); if (rc2 != 0) CWARN("%s: sp obj dotdot insert error: rc = %d\n", mdd2obd_dev(mdd)->obd_name, rc2); } fixup_spobj2: if (rc != 0) { rc2 = __mdd_index_insert(env, mdd_spobj, lf, mdd_object_type(mdd_sobj), sname, handle); if (rc2 != 0) CWARN("sp obj fix error: rc = %d\n", rc2); } cleanup: if (tobj_locked) mdd_write_unlock(env, mdd_tobj); cleanup_unlocked: if (rc == 0) rc = mdd_changelog_ns_store(env, mdd, CL_RENAME, cl_flags, mdd_tobj, tpobj_fid, lf, spobj_fid, ltname, lsname, handle); stop: mdd_trans_stop(env, mdd, rc, handle); out_pending: mdd_object_put(env, mdd_sobj); return rc; } /** * During migration once the parent FID has been changed, * we need update the parent FID in linkea. **/ static int mdd_linkea_update_child_internal(const struct lu_env *env, struct mdd_object *parent, struct mdd_object *child, const char *name, int namelen, struct thandle *handle, bool declare) { struct mdd_thread_info *info = mdd_env_info(env); struct linkea_data ldata = { NULL }; struct lu_buf *buf = &info->mti_link_buf; int count; int rc = 0; ENTRY; buf = lu_buf_check_and_alloc(buf, PATH_MAX); if (buf->lb_buf == NULL) RETURN(-ENOMEM); ldata.ld_buf = buf; rc = mdd_links_read(env, child, &ldata); if (rc != 0) { if (rc == -ENOENT || rc == -ENODATA) rc = 0; RETURN(rc); } LASSERT(ldata.ld_leh != NULL); ldata.ld_lee = (struct link_ea_entry *)(ldata.ld_leh + 1); for (count = 0; count < ldata.ld_leh->leh_reccount; count++) { struct mdd_device *mdd = mdo2mdd(&child->mod_obj); struct lu_name lname; struct lu_fid fid; linkea_entry_unpack(ldata.ld_lee, &ldata.ld_reclen, &lname, &fid); if (strncmp(lname.ln_name, name, namelen) != 0 || lu_fid_eq(&fid, mdd_object_fid(parent))) { ldata.ld_lee = (struct link_ea_entry *) ((char *)ldata.ld_lee + ldata.ld_reclen); continue; } CDEBUG(D_INFO, "%s: update "DFID" with %.*s:"DFID"\n", mdd2obd_dev(mdd)->obd_name, PFID(mdd_object_fid(child)), lname.ln_namelen, lname.ln_name, PFID(mdd_object_fid(parent))); /* update to the new parent fid */ linkea_entry_pack(ldata.ld_lee, &lname, mdd_object_fid(parent)); if (declare) rc = mdd_declare_links_add(env, child, handle, &ldata, MLAO_IGNORE); else rc = mdd_links_write(env, child, &ldata, handle); break; } RETURN(rc); } static int mdd_linkea_declare_update_child(const struct lu_env *env, struct mdd_object *parent, struct mdd_object *child, const char *name, int namelen, struct thandle *handle) { return mdd_linkea_update_child_internal(env, parent, child, name, namelen, handle, true); } static int mdd_linkea_update_child(const struct lu_env *env, struct mdd_object *parent, struct mdd_object *child, const char *name, int namelen, struct thandle *handle) { return mdd_linkea_update_child_internal(env, parent, child, name, namelen, handle, false); } static int mdd_update_linkea_internal(const struct lu_env *env, struct mdd_object *mdd_pobj, struct mdd_object *mdd_sobj, struct mdd_object *mdd_tobj, const struct lu_name *child_name, struct thandle *handle, int declare) { struct mdd_thread_info *info = mdd_env_info(env); struct linkea_data *ldata = &info->mti_link_data; int count; int rc = 0; ENTRY; rc = mdd_links_read(env, mdd_sobj, ldata); if (rc != 0) { if (rc == -ENOENT || rc == -ENODATA) rc = 0; RETURN(rc); } /* If it is mulitple links file, we need update the name entry for * all parent */ LASSERT(ldata->ld_leh != NULL); ldata->ld_lee = (struct link_ea_entry *)(ldata->ld_leh + 1); for (count = 0; count < ldata->ld_leh->leh_reccount; count++) { struct mdd_device *mdd = mdo2mdd(&mdd_sobj->mod_obj); struct mdd_object *pobj; struct lu_name lname; struct lu_fid fid; linkea_entry_unpack(ldata->ld_lee, &ldata->ld_reclen, &lname, &fid); ldata->ld_lee = (struct link_ea_entry *)((char *)ldata->ld_lee + ldata->ld_reclen); pobj = mdd_object_find(env, mdd, &fid); if (IS_ERR(pobj)) { CWARN("%s: cannot find obj "DFID": rc = %ld\n", mdd2obd_dev(mdd)->obd_name, PFID(&fid), PTR_ERR(pobj)); continue; } if (!mdd_object_exists(pobj)) { CDEBUG(D_INFO, "%s: obj "DFID" does not exist\n", mdd2obd_dev(mdd)->obd_name, PFID(&fid)); GOTO(next_put, rc); } if (pobj == mdd_pobj && lname.ln_namelen == child_name->ln_namelen && strncmp(lname.ln_name, child_name->ln_name, lname.ln_namelen) == 0) { CDEBUG(D_INFO, "%s: skip its own %s: "DFID"\n", mdd2obd_dev(mdd)->obd_name, child_name->ln_name, PFID(&fid)); GOTO(next_put, rc); } CDEBUG(D_INFO, "%s: update "DFID" with "DNAME":"DFID"\n", mdd2obd_dev(mdd)->obd_name, PFID(mdd_object_fid(pobj)), PNAME(&lname), PFID(mdd_object_fid(mdd_tobj))); if (declare) { /* Remove source name from source directory */ /* Insert new fid with target name into target dir */ rc = mdo_declare_index_delete(env, pobj, lname.ln_name, handle); if (rc != 0) GOTO(next_put, rc); rc = mdo_declare_index_insert(env, pobj, mdd_object_fid(mdd_tobj), mdd_object_type(mdd_tobj), lname.ln_name, handle); if (rc != 0) GOTO(next_put, rc); rc = mdo_declare_ref_add(env, mdd_tobj, handle); if (rc) GOTO(next_put, rc); rc = mdo_declare_ref_del(env, mdd_sobj, handle); if (rc) GOTO(next_put, rc); } else { rc = __mdd_index_delete(env, pobj, lname.ln_name, 0, handle); if (rc) GOTO(next_put, rc); rc = __mdd_index_insert(env, pobj, mdd_object_fid(mdd_tobj), mdd_object_type(mdd_tobj), lname.ln_name, handle); if (rc != 0) GOTO(next_put, rc); mdd_write_lock(env, mdd_tobj, MOR_SRC_CHILD); rc = mdo_ref_add(env, mdd_tobj, handle); mdd_write_unlock(env, mdd_tobj); if (rc) GOTO(next_put, rc); mdd_write_lock(env, mdd_sobj, MOR_TGT_CHILD); mdo_ref_del(env, mdd_sobj, handle); mdd_write_unlock(env, mdd_sobj); } next_put: mdd_object_put(env, pobj); if (rc != 0) break; } RETURN(rc); } static int mdd_migrate_xattrs(const struct lu_env *env, struct mdd_object *mdd_sobj, struct mdd_object *mdd_tobj) { struct mdd_thread_info *info = mdd_env_info(env); struct mdd_device *mdd = mdo2mdd(&mdd_sobj->mod_obj); char *xname; struct thandle *handle; struct lu_buf xbuf; int xlen; int rem; int xsize; int list_xsize; struct lu_buf list_xbuf; int rc; /* retrieve xattr list from the old object */ list_xsize = mdo_xattr_list(env, mdd_sobj, &LU_BUF_NULL); if (list_xsize == -ENODATA) return 0; if (list_xsize < 0) return list_xsize; lu_buf_check_and_alloc(&info->mti_big_buf, list_xsize); if (info->mti_big_buf.lb_buf == NULL) return -ENOMEM; list_xbuf.lb_buf = info->mti_big_buf.lb_buf; list_xbuf.lb_len = list_xsize; rc = mdo_xattr_list(env, mdd_sobj, &list_xbuf); if (rc < 0) return rc; rc = 0; rem = list_xsize; xname = list_xbuf.lb_buf; while (rem > 0) { xlen = strnlen(xname, rem - 1) + 1; if (strcmp(XATTR_NAME_LINK, xname) == 0 || strcmp(XATTR_NAME_LMA, xname) == 0 || strcmp(XATTR_NAME_LMV, xname) == 0) goto next; /* For directory, if there are default layout, migrate here */ if (strcmp(XATTR_NAME_LOV, xname) == 0 && !S_ISDIR(lu_object_attr(&mdd_sobj->mod_obj.mo_lu))) goto next; xsize = mdo_xattr_get(env, mdd_sobj, &LU_BUF_NULL, xname); if (xsize == -ENODATA) goto next; if (xsize < 0) GOTO(out, rc); lu_buf_check_and_alloc(&info->mti_link_buf, xsize); if (info->mti_link_buf.lb_buf == NULL) GOTO(out, rc = -ENOMEM); xbuf.lb_len = xsize; xbuf.lb_buf = info->mti_link_buf.lb_buf; rc = mdo_xattr_get(env, mdd_sobj, &xbuf, xname); if (rc == -ENODATA) goto next; if (rc < 0) GOTO(out, rc); handle = mdd_trans_create(env, mdd); if (IS_ERR(handle)) GOTO(out, rc = PTR_ERR(handle)); rc = mdo_declare_xattr_set(env, mdd_tobj, &xbuf, xname, 0, handle); if (rc != 0) GOTO(stop_trans, rc); /* Note: this transaction is part of migration, and it is not * the last step of migration, so we set th_local = 1 to avoid * update last rcvd for this transaction */ handle->th_local = 1; rc = mdd_trans_start(env, mdd, handle); if (rc != 0) GOTO(stop_trans, rc); rc = mdo_xattr_set(env, mdd_tobj, &xbuf, xname, 0, handle); if (rc == -EEXIST) GOTO(stop_trans, rc = 0); if (rc != 0) GOTO(stop_trans, rc); stop_trans: mdd_trans_stop(env, mdd, rc, handle); if (rc != 0) GOTO(out, rc); next: rem -= xlen; memmove(xname, xname + xlen, rem); } out: return rc; } static int mdd_declare_migrate_create(const struct lu_env *env, struct mdd_object *mdd_pobj, struct mdd_object *mdd_sobj, struct mdd_object *mdd_tobj, struct md_op_spec *spec, struct lu_attr *la, union lmv_mds_md *mgr_ea, struct linkea_data *ldata, struct thandle *handle) { struct lu_attr *la_flag = MDD_ENV_VAR(env, la_for_fix); const struct lu_buf *buf; int rc; int mgr_easize; rc = mdd_declare_object_create_internal(env, mdd_pobj, mdd_tobj, la, handle, spec, NULL); if (rc != 0) return rc; rc = mdd_declare_object_initialize(env, mdd_pobj, mdd_tobj, la, handle); if (rc != 0) return rc; if (S_ISLNK(la->la_mode)) { const char *target_name = spec->u.sp_symname; int sym_len = strlen(target_name); const struct lu_buf *buf; buf = mdd_buf_get_const(env, target_name, sym_len); rc = dt_declare_record_write(env, mdd_object_child(mdd_tobj), buf, 0, handle); if (rc != 0) return rc; } else if (S_ISDIR(la->la_mode)) { rc = mdd_declare_links_add(env, mdd_tobj, handle, ldata, MLAO_IGNORE); if (rc != 0) return rc; } if (spec->u.sp_ea.eadata != NULL && spec->u.sp_ea.eadatalen != 0) { buf = mdd_buf_get_const(env, spec->u.sp_ea.eadata, spec->u.sp_ea.eadatalen); rc = mdo_declare_xattr_set(env, mdd_tobj, buf, XATTR_NAME_LOV, 0, handle); if (rc) return rc; } mgr_easize = lmv_mds_md_size(2, LMV_MAGIC_V1); buf = mdd_buf_get_const(env, mgr_ea, mgr_easize); rc = mdo_declare_xattr_set(env, mdd_sobj, buf, XATTR_NAME_LMV, 0, handle); if (rc) return rc; la_flag->la_valid = LA_FLAGS; la_flag->la_flags = la->la_flags | LUSTRE_IMMUTABLE_FL; rc = mdo_declare_attr_set(env, mdd_sobj, la_flag, handle); return rc; } static int mdd_migrate_create(const struct lu_env *env, struct mdd_object *mdd_pobj, struct mdd_object *mdd_sobj, struct mdd_object *mdd_tobj, const struct lu_name *lname, struct lu_attr *la) { struct mdd_thread_info *info = mdd_env_info(env); struct mdd_device *mdd = mdo2mdd(&mdd_sobj->mod_obj); struct md_op_spec *spec = &info->mti_spec; struct lu_buf lmm_buf = { NULL }; struct lu_buf link_buf = { NULL }; const struct lu_buf *buf; struct thandle *handle; struct lmv_mds_md_v1 *mgr_ea; struct lu_attr *la_flag = MDD_ENV_VAR(env, la_for_fix); struct dt_allocation_hint *hint = &mdd_env_info(env)->mti_hint; int mgr_easize; struct linkea_data *ldata = &mdd_env_info(env)->mti_link_data; int rc; ENTRY; /* prepare spec for create */ memset(spec, 0, sizeof(*spec)); spec->sp_cr_lookup = 0; spec->sp_feat = &dt_directory_features; if (S_ISLNK(la->la_mode)) { buf = lu_buf_check_and_alloc( &mdd_env_info(env)->mti_big_buf, la->la_size + 1); link_buf = *buf; link_buf.lb_len = la->la_size + 1; memset(link_buf.lb_buf, 0, link_buf.lb_len); rc = mdd_readlink(env, &mdd_sobj->mod_obj, &link_buf); if (rc <= 0) { rc = rc != 0 ? rc : -EFAULT; CERROR("%s: "DFID" readlink failed: rc = %d\n", mdd2obd_dev(mdd)->obd_name, PFID(mdd_object_fid(mdd_sobj)), rc); RETURN(rc); } spec->u.sp_symname = link_buf.lb_buf; } else if S_ISREG(la->la_mode) { /* retrieve lov of the old object */ rc = mdd_get_lov_ea(env, mdd_sobj, &lmm_buf); if (rc != 0 && rc != -ENODATA) RETURN(rc); if (lmm_buf.lb_buf != NULL && lmm_buf.lb_len != 0) { spec->u.sp_ea.eadata = lmm_buf.lb_buf; spec->u.sp_ea.eadatalen = lmm_buf.lb_len; spec->sp_cr_flags |= MDS_OPEN_HAS_EA; } } else if (S_ISDIR(la->la_mode)) { rc = mdd_links_read(env, mdd_sobj, ldata); if (rc < 0 && rc != -ENODATA) RETURN(rc); } mgr_ea = (struct lmv_mds_md_v1 *)info->mti_xattr_buf; memset(mgr_ea, 0, sizeof(*mgr_ea)); mgr_ea->lmv_magic = cpu_to_le32(LMV_MAGIC_V1); mgr_ea->lmv_stripe_count = cpu_to_le32(2); mgr_ea->lmv_master_mdt_index = mdd_seq_site(mdd)->ss_node_id; mgr_ea->lmv_hash_type = cpu_to_le32(LMV_HASH_FLAG_MIGRATION); fid_cpu_to_le(&mgr_ea->lmv_stripe_fids[0], mdd_object_fid(mdd_sobj)); fid_cpu_to_le(&mgr_ea->lmv_stripe_fids[1], mdd_object_fid(mdd_tobj)); mdd_object_make_hint(env, mdd_pobj, mdd_tobj, la, spec, hint); handle = mdd_trans_create(env, mdd); if (IS_ERR(handle)) GOTO(out_free, rc = PTR_ERR(handle)); /* Note: this transaction is part of migration, and it is not * the last step of migration, so we set th_local = 1 to avoid * update last rcvd for this transaction */ handle->th_local = 1; rc = mdd_declare_migrate_create(env, mdd_pobj, mdd_sobj, mdd_tobj, spec, la, (union lmv_mds_md *)info->mti_xattr_buf, ldata, handle); if (rc != 0) GOTO(stop_trans, rc); rc = mdd_trans_start(env, mdd, handle); if (rc != 0) GOTO(stop_trans, rc); /* create the target object */ rc = mdd_object_create(env, mdd_pobj, mdd_tobj, la, spec, NULL, NULL, hint, handle); if (rc != 0) GOTO(stop_trans, rc); if (S_ISDIR(la->la_mode)) { rc = mdd_links_write(env, mdd_tobj, ldata, handle); if (rc != 0) GOTO(stop_trans, rc); } /* Set MIGRATE EA on the source inode, so once the migration needs * to be re-done during failover, the re-do process can locate the * target object which is already being created. */ mgr_easize = lmv_mds_md_size(2, LMV_MAGIC_V1); buf = mdd_buf_get_const(env, mgr_ea, mgr_easize); rc = mdo_xattr_set(env, mdd_sobj, buf, XATTR_NAME_LMV, 0, handle); if (rc != 0) GOTO(stop_trans, rc); /* Set immutable flag, so any modification is disabled until * the migration is done. Once the migration is interrupted, * if the resume process find the migrating object has both * IMMUTALBE flag and MIGRATE EA, it need to clear IMMUTABLE * flag and approve the migration */ la_flag->la_valid = LA_FLAGS; la_flag->la_flags = la->la_flags | LUSTRE_IMMUTABLE_FL; rc = mdo_attr_set(env, mdd_sobj, la_flag, handle); stop_trans: if (handle != NULL) mdd_trans_stop(env, mdd, rc, handle); out_free: if (lmm_buf.lb_buf != NULL) OBD_FREE(lmm_buf.lb_buf, lmm_buf.lb_len); RETURN(rc); } static int mdd_migrate_entries(const struct lu_env *env, struct mdd_object *mdd_sobj, struct mdd_object *mdd_tobj) { struct dt_object *next = mdd_object_child(mdd_sobj); struct mdd_device *mdd = mdo2mdd(&mdd_sobj->mod_obj); struct dt_object *dt_tobj = mdd_object_child(mdd_tobj); struct thandle *handle; struct dt_it *it; const struct dt_it_ops *iops; int rc; int result; struct lu_dirent *ent; ENTRY; OBD_ALLOC(ent, NAME_MAX + sizeof(*ent) + 1); if (ent == NULL) RETURN(-ENOMEM); if (!dt_try_as_dir(env, next)) GOTO(out_ent, rc = -ENOTDIR); /* * iterate directories */ iops = &next->do_index_ops->dio_it; it = iops->init(env, next, LUDA_FID | LUDA_TYPE); if (IS_ERR(it)) GOTO(out_ent, rc = PTR_ERR(it)); rc = iops->load(env, it, 0); if (rc == 0) rc = iops->next(env, it); else if (rc > 0) rc = 0; /* * At this point and across for-loop: * * rc == 0 -> ok, proceed. * rc > 0 -> end of directory. * rc < 0 -> error. */ do { struct mdd_object *child; char *name = mdd_env_info(env)->mti_key; int len; int recsize; int is_dir; bool target_exist = false; len = iops->key_size(env, it); if (len == 0) goto next; result = iops->rec(env, it, (struct dt_rec *)ent, LUDA_FID | LUDA_TYPE); if (result == -ESTALE) goto next; if (result != 0) { rc = result; goto out; } fid_le_to_cpu(&ent->lde_fid, &ent->lde_fid); recsize = le16_to_cpu(ent->lde_reclen); /* Insert new fid with target name into target dir */ if ((ent->lde_namelen == 1 && ent->lde_name[0] == '.') || (ent->lde_namelen == 2 && ent->lde_name[0] == '.' && ent->lde_name[1] == '.')) goto next; child = mdd_object_find(env, mdd, &ent->lde_fid); if (IS_ERR(child)) GOTO(out, rc = PTR_ERR(child)); is_dir = S_ISDIR(mdd_object_type(child)); snprintf(name, ent->lde_namelen + 1, "%s", ent->lde_name); /* Check whether the name has been inserted to the target */ if (dt_try_as_dir(env, dt_tobj)) { struct lu_fid *fid = &mdd_env_info(env)->mti_fid2; rc = dt_lookup(env, dt_tobj, (struct dt_rec *)fid, (struct dt_key *)name); if (unlikely(rc == 0)) target_exist = true; } handle = mdd_trans_create(env, mdd); if (IS_ERR(handle)) GOTO(out, rc = PTR_ERR(handle)); /* Note: this transaction is part of migration, and it is not * the last step of migration, so we set th_local = 1 to avoid * updating last rcvd for this transaction */ handle->th_local = 1; if (likely(!target_exist)) { rc = mdo_declare_index_insert(env, mdd_tobj, &ent->lde_fid, mdd_object_type(child), name, handle); if (rc != 0) GOTO(out_put, rc); if (is_dir) { rc = mdo_declare_ref_add(env, mdd_tobj, handle); if (rc != 0) GOTO(out_put, rc); } } rc = mdo_declare_index_delete(env, mdd_sobj, name, handle); if (rc != 0) GOTO(out_put, rc); if (is_dir) { rc = mdo_declare_ref_del(env, mdd_sobj, handle); if (rc != 0) GOTO(out_put, rc); /* Update .. for child */ rc = mdo_declare_index_delete(env, child, dotdot, handle); if (rc != 0) GOTO(out_put, rc); rc = mdo_declare_index_insert(env, child, mdd_object_fid(mdd_tobj), S_IFDIR, dotdot, handle); if (rc != 0) GOTO(out_put, rc); } rc = mdd_linkea_declare_update_child(env, mdd_tobj, child, name, strlen(name), handle); if (rc != 0) GOTO(out_put, rc); rc = mdd_trans_start(env, mdd, handle); if (rc != 0) { CERROR("%s: transaction start failed: rc = %d\n", mdd2obd_dev(mdd)->obd_name, rc); GOTO(out_put, rc); } if (likely(!target_exist)) { rc = __mdd_index_insert(env, mdd_tobj, &ent->lde_fid, mdd_object_type(child), name, handle); if (rc != 0) GOTO(out_put, rc); } rc = __mdd_index_delete(env, mdd_sobj, name, is_dir, handle); if (rc != 0) GOTO(out_put, rc); if (is_dir) { rc = __mdd_index_delete_only(env, child, dotdot, handle); if (rc != 0) GOTO(out_put, rc); rc = __mdd_index_insert_only(env, child, mdd_object_fid(mdd_tobj), S_IFDIR, dotdot, handle); if (rc != 0) GOTO(out_put, rc); } rc = mdd_linkea_update_child(env, mdd_tobj, child, name, strlen(name), handle); out_put: mdd_object_put(env, child); mdd_trans_stop(env, mdd, rc, handle); if (rc != 0) GOTO(out, rc); next: result = iops->next(env, it); if (OBD_FAIL_CHECK(OBD_FAIL_MIGRATE_ENTRIES)) GOTO(out, rc = -EINTR); if (result == -ESTALE) goto next; } while (result == 0); out: iops->put(env, it); iops->fini(env, it); out_ent: OBD_FREE(ent, NAME_MAX + sizeof(*ent) + 1); RETURN(rc); } static int mdd_declare_update_linkea(const struct lu_env *env, struct mdd_object *mdd_pobj, struct mdd_object *mdd_sobj, struct mdd_object *mdd_tobj, struct thandle *handle, const struct lu_name *child_name) { return mdd_update_linkea_internal(env, mdd_pobj, mdd_sobj, mdd_tobj, child_name, handle, 1); } static int mdd_update_linkea(const struct lu_env *env, struct mdd_object *mdd_pobj, struct mdd_object *mdd_sobj, struct mdd_object *mdd_tobj, struct thandle *handle, const struct lu_name *child_name) { return mdd_update_linkea_internal(env, mdd_pobj, mdd_sobj, mdd_tobj, child_name, handle, 0); } static int mdd_declare_migrate_update_name(const struct lu_env *env, struct mdd_object *mdd_pobj, struct mdd_object *mdd_sobj, struct mdd_object *mdd_tobj, const struct lu_name *lname, struct lu_attr *la, struct lu_attr *parent_la, struct thandle *handle) { struct lu_attr *la_flag = MDD_ENV_VAR(env, tattr); int rc; /* Revert IMMUTABLE flag */ la_flag->la_valid = LA_FLAGS; la_flag->la_flags = la->la_flags & ~LUSTRE_IMMUTABLE_FL; rc = mdo_declare_attr_set(env, mdd_sobj, la_flag, handle); if (rc != 0) return rc; /* delete entry from source dir */ rc = mdo_declare_index_delete(env, mdd_pobj, lname->ln_name, handle); if (rc != 0) return rc; rc = mdd_declare_update_linkea(env, mdd_pobj, mdd_sobj, mdd_tobj, handle, lname); if (rc != 0) return rc; if (S_ISREG(mdd_object_type(mdd_sobj))) { rc = mdo_declare_xattr_del(env, mdd_sobj, XATTR_NAME_LOV, handle); if (rc != 0) return rc; } if (S_ISDIR(mdd_object_type(mdd_sobj))) { rc = mdo_declare_ref_del(env, mdd_pobj, handle); if (rc != 0) return rc; } /* new name */ rc = mdo_declare_index_insert(env, mdd_pobj, mdo2fid(mdd_tobj), mdd_object_type(mdd_tobj), lname->ln_name, handle); if (rc != 0) return rc; rc = mdd_declare_links_add(env, mdd_tobj, handle, NULL, MLAO_IGNORE); if (rc != 0) return rc; if (S_ISDIR(mdd_object_type(mdd_sobj))) { rc = mdo_declare_ref_add(env, mdd_pobj, handle); if (rc != 0) return rc; } /* delete old object */ rc = mdo_declare_ref_del(env, mdd_sobj, handle); if (rc != 0) return rc; if (S_ISDIR(mdd_object_type(mdd_sobj))) { /* delete old object */ rc = mdo_declare_ref_del(env, mdd_sobj, handle); if (rc != 0) return rc; /* set nlink to 0 */ rc = mdo_declare_attr_set(env, mdd_sobj, la, handle); if (rc != 0) return rc; } rc = mdd_declare_finish_unlink(env, mdd_sobj, handle); if (rc) return rc; rc = mdo_declare_attr_set(env, mdd_pobj, parent_la, handle); return rc; } static int mdd_migrate_update_name(const struct lu_env *env, struct mdd_object *mdd_pobj, struct mdd_object *mdd_sobj, struct mdd_object *mdd_tobj, const struct lu_name *lname, struct md_attr *ma) { struct lu_attr *p_la = MDD_ENV_VAR(env, la_for_fix); struct lu_attr *so_attr = MDD_ENV_VAR(env, cattr); struct lu_attr *la_flag = MDD_ENV_VAR(env, tattr); struct mdd_device *mdd = mdo2mdd(&mdd_sobj->mod_obj); struct thandle *handle; int is_dir = S_ISDIR(mdd_object_type(mdd_sobj)); const char *name = lname->ln_name; int rc; ENTRY; /* update time for parent */ LASSERT(ma->ma_attr.la_valid & LA_CTIME); p_la->la_ctime = p_la->la_mtime = ma->ma_attr.la_ctime; p_la->la_valid = LA_CTIME; rc = mdd_la_get(env, mdd_sobj, so_attr); if (rc != 0) RETURN(rc); handle = mdd_trans_create(env, mdd); if (IS_ERR(handle)) RETURN(PTR_ERR(handle)); rc = mdd_declare_migrate_update_name(env, mdd_pobj, mdd_sobj, mdd_tobj, lname, so_attr, p_la, handle); if (rc != 0) { /* If the migration can not be fit in one transaction, just * leave it in the original MDT */ if (rc == -E2BIG) GOTO(stop_trans, rc = 0); else GOTO(stop_trans, rc); } CDEBUG(D_INFO, "%s: update "DFID"/"DFID" with %s:"DFID"\n", mdd2obd_dev(mdd)->obd_name, PFID(mdd_object_fid(mdd_pobj)), PFID(mdd_object_fid(mdd_sobj)), lname->ln_name, PFID(mdd_object_fid(mdd_tobj))); rc = mdd_trans_start(env, mdd, handle); if (rc != 0) GOTO(stop_trans, rc); /* Revert IMMUTABLE flag */ la_flag->la_valid = LA_FLAGS; la_flag->la_flags = so_attr->la_flags & ~LUSTRE_IMMUTABLE_FL; rc = mdo_attr_set(env, mdd_sobj, la_flag, handle); if (rc != 0) GOTO(stop_trans, rc); /* Remove source name from source directory */ rc = __mdd_index_delete(env, mdd_pobj, name, is_dir, handle); if (rc != 0) GOTO(stop_trans, rc); rc = mdd_update_linkea(env, mdd_pobj, mdd_sobj, mdd_tobj, handle, lname); if (rc != 0) GOTO(stop_trans, rc); if (S_ISREG(so_attr->la_mode)) { if (so_attr->la_nlink == 1) { rc = mdo_xattr_del(env, mdd_sobj, XATTR_NAME_LOV, handle); if (rc != 0 && rc != -ENODATA) GOTO(stop_trans, rc); } } /* Insert new fid with target name into target dir */ rc = __mdd_index_insert(env, mdd_pobj, mdd_object_fid(mdd_tobj), mdd_object_type(mdd_tobj), name, handle); if (rc != 0) GOTO(stop_trans, rc); rc = mdd_links_add(env, mdd_tobj, mdo2fid(mdd_pobj), lname, handle, NULL, 1); if (rc != 0) GOTO(stop_trans, rc); mdd_write_lock(env, mdd_sobj, MOR_SRC_CHILD); mdo_ref_del(env, mdd_sobj, handle); if (is_dir) mdo_ref_del(env, mdd_sobj, handle); /* Get the attr again after ref_del */ rc = mdd_la_get(env, mdd_sobj, so_attr); if (rc != 0) GOTO(out_unlock, rc); ma->ma_attr = *so_attr; ma->ma_valid |= MA_INODE; rc = mdd_finish_unlink(env, mdd_sobj, ma, mdd_pobj, lname, handle); if (rc != 0) GOTO(out_unlock, rc); rc = mdd_attr_set_internal(env, mdd_pobj, p_la, handle, 0); if (rc != 0) GOTO(out_unlock, rc); out_unlock: mdd_write_unlock(env, mdd_sobj); stop_trans: mdd_trans_stop(env, mdd, rc, handle); RETURN(rc); } /** * Check whether we should migrate the file/dir * return val * < 0 permission check failed or other error. * = 0 the file can be migrated. * > 0 the file does not need to be migrated, mostly * for multiple link file **/ static int mdd_migrate_sanity_check(const struct lu_env *env, struct mdd_object *pobj, const struct lu_attr *pattr, struct mdd_object *sobj, struct lu_attr *sattr) { struct mdd_thread_info *info = mdd_env_info(env); struct linkea_data *ldata = &info->mti_link_data; int mgr_easize; struct lu_buf *mgr_buf; int count; int rc; ENTRY; mgr_easize = lmv_mds_md_size(2, LMV_MAGIC_V1); mgr_buf = lu_buf_check_and_alloc(&info->mti_big_buf, mgr_easize); if (mgr_buf->lb_buf == NULL) RETURN(-ENOMEM); rc = mdo_xattr_get(env, sobj, mgr_buf, XATTR_NAME_LMV); if (rc > 0) { union lmv_mds_md *lmm = mgr_buf->lb_buf; /* If the object has migrateEA, it means IMMUTE flag * is being set by previous migration process, so it * needs to override the IMMUTE flag, otherwise the * following sanity check will fail */ if (le32_to_cpu(lmm->lmv_md_v1.lmv_hash_type) & LMV_HASH_FLAG_MIGRATION) { struct mdd_device *mdd = mdo2mdd(&sobj->mod_obj); sattr->la_flags &= ~LUSTRE_IMMUTABLE_FL; CDEBUG(D_HA, "%s: "DFID" override IMMUTE FLAG\n", mdd2obd_dev(mdd)->obd_name, PFID(mdd_object_fid(sobj))); } } rc = mdd_rename_sanity_check(env, pobj, pattr, pobj, pattr, sobj, sattr, NULL, NULL); if (rc != 0) RETURN(rc); /* Then it will check if the file should be migrated. If the file * has mulitple links, we only need migrate the file if all of its * entries has been migrated to the remote MDT */ if (!S_ISREG(sattr->la_mode) || sattr->la_nlink < 2) RETURN(0); rc = mdd_links_read(env, sobj, ldata); if (rc != 0) { /* For multiple links files, if there are no linkEA data at all, * means the file might be created before linkEA is enabled, and * all all of its links should not be migrated yet, otherwise * it should have some linkEA there */ if (rc == -ENOENT || rc == -ENODATA) RETURN(1); RETURN(rc); } /* If it is mulitple links file, we need update the name entry for * all parent */ LASSERT(ldata->ld_leh != NULL); ldata->ld_lee = (struct link_ea_entry *)(ldata->ld_leh + 1); for (count = 0; count < ldata->ld_leh->leh_reccount; count++) { struct mdd_device *mdd = mdo2mdd(&sobj->mod_obj); struct mdd_object *lpobj; struct lu_name lname; struct lu_fid fid; linkea_entry_unpack(ldata->ld_lee, &ldata->ld_reclen, &lname, &fid); ldata->ld_lee = (struct link_ea_entry *)((char *)ldata->ld_lee + ldata->ld_reclen); lpobj = mdd_object_find(env, mdd, &fid); if (IS_ERR(lpobj)) { CWARN("%s: cannot find obj "DFID": rc = %ld\n", mdd2obd_dev(mdd)->obd_name, PFID(&fid), PTR_ERR(lpobj)); continue; } if (!mdd_object_exists(lpobj) || mdd_object_remote(lpobj)) { CDEBUG(D_INFO, DFID"%.*s: is on remote MDT.\n", PFID(&fid), lname.ln_namelen, lname.ln_name); mdd_object_put(env, lpobj); continue; } CDEBUG(D_INFO, DFID"still has local entry %.*s "DFID"\n", PFID(mdd_object_fid(sobj)), lname.ln_namelen, lname.ln_name, PFID(&fid)); mdd_object_put(env, lpobj); rc = 1; break; } RETURN(rc); } static int mdd_migrate(const struct lu_env *env, struct md_object *pobj, struct md_object *sobj, const struct lu_name *lname, struct md_object *tobj, struct md_attr *ma) { struct mdd_object *mdd_pobj = md2mdd_obj(pobj); struct mdd_device *mdd = mdo2mdd(pobj); struct mdd_object *mdd_sobj = md2mdd_obj(sobj); struct mdd_object *mdd_tobj = NULL; struct lu_attr *so_attr = MDD_ENV_VAR(env, cattr); struct lu_attr *pattr = MDD_ENV_VAR(env, pattr); int rc; ENTRY; /* If the file will being migrated, it will check whether * the file is being opened by someone else right now */ mdd_read_lock(env, mdd_sobj, MOR_SRC_CHILD); if (mdd_sobj->mod_count >= 1) { CERROR("%s: "DFID"%s is already opened count %d: rc = %d\n", mdd2obd_dev(mdd)->obd_name, PFID(mdd_object_fid(mdd_sobj)), lname->ln_name, mdd_sobj->mod_count, -EBUSY); mdd_read_unlock(env, mdd_sobj); GOTO(put, rc = -EBUSY); } mdd_read_unlock(env, mdd_sobj); rc = mdd_la_get(env, mdd_sobj, so_attr); if (rc != 0) GOTO(put, rc); rc = mdd_la_get(env, mdd_pobj, pattr); if (rc != 0) GOTO(put, rc); rc = mdd_migrate_sanity_check(env, mdd_pobj, pattr, mdd_sobj, so_attr); if (rc != 0) { if (rc > 0) rc = 0; GOTO(put, rc); } /* Sigh, it is impossible to finish all of migration in a single * transaction, for example migrating big directory entries to the * new MDT, it needs insert all of name entries of children in the * new directory. * * So migration will be done in multiple steps and transactions. * * 1. create an orphan object on the remote MDT in one transaction. * 2. migrate extend attributes to the new target file/directory. * 3. For directory, migrate the entries to the new MDT and update * linkEA of each children. Because we can not migrate all entries * in a single transaction, so the migrating directory will become * a striped directory during migration, so once the process is * interrupted, the directory is still accessible. (During lookup, * client will locate the name by searching both original and target * object). * 4. Finally, update the name/FID to point to the new file/directory * in a separate transaction. */ /* step 1: Check whether the orphan object has been created, and create * orphan object on the remote MDT if needed */ mdd_tobj = md2mdd_obj(tobj); if (!mdd_object_exists(mdd_tobj)) { rc = mdd_migrate_create(env, mdd_pobj, mdd_sobj, mdd_tobj, lname, so_attr); if (rc != 0) GOTO(put, rc); } /* step 2: migrate xattr */ rc = mdd_migrate_xattrs(env, mdd_sobj, mdd_tobj); if (rc != 0) GOTO(put, rc); /* step 3: migrate name entries to the orphan object */ if (S_ISDIR(lu_object_attr(&mdd_sobj->mod_obj.mo_lu))) { rc = mdd_migrate_entries(env, mdd_sobj, mdd_tobj); if (rc != 0) GOTO(put, rc); if (unlikely(OBD_FAIL_CHECK_RESET(OBD_FAIL_MIGRATE_NET_REP, OBD_FAIL_MDS_REINT_NET_REP))) GOTO(put, rc = 0); } else { OBD_FAIL_TIMEOUT(OBD_FAIL_MIGRATE_DELAY, cfs_fail_val); } /* step 4: update name entry to the new object */ rc = mdd_migrate_update_name(env, mdd_pobj, mdd_sobj, mdd_tobj, lname, ma); if (rc != 0) GOTO(put, rc); put: RETURN(rc); } const struct md_dir_operations mdd_dir_ops = { .mdo_is_subdir = mdd_is_subdir, .mdo_lookup = mdd_lookup, .mdo_create = mdd_create, .mdo_rename = mdd_rename, .mdo_link = mdd_link, .mdo_unlink = mdd_unlink, .mdo_create_data = mdd_create_data, .mdo_migrate = mdd_migrate, };