/* * 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, 2013, 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 int __mdd_lookup(const struct lu_env *, struct md_object *, const struct lu_name *, struct lu_fid*, int); static int __mdd_lookup_locked(const struct lu_env *env, struct md_object *pobj, const struct lu_name *lname, struct lu_fid* fid, int mask) { const char *name = lname->ln_name; struct mdd_object *mdd_obj = md2mdd_obj(pobj); struct dynlock_handle *dlh; int rc; dlh = mdd_pdo_read_lock(env, mdd_obj, name, MOR_TGT_PARENT); if (unlikely(dlh == NULL)) return -ENOMEM; rc = __mdd_lookup(env, pobj, lname, fid, mask); mdd_pdo_read_unlock(env, mdd_obj, dlh); 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) { int rc; ENTRY; rc = __mdd_lookup_locked(env, pobj, lname, fid, MAY_EXEC); RETURN(rc); } int mdd_parent_fid(const struct lu_env *env, struct mdd_object *obj, struct lu_fid *fid) { return __mdd_lookup_locked(env, &obj->mod_obj, &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_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, bypass capa for each obj */ mdd_set_capainfo(env, 4, p1, BYPASS_CAPA); rc = mdd_parent_fid(env, p1, pfid); if (rc) GOTO(out, rc); if (mdd_is_root(mdd, pfid)) 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 a 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); int rc; ENTRY; if (!S_ISDIR(mdd_object_type(md2mdd_obj(mo)))) RETURN(0); rc = mdd_is_parent(env, mdd, md2mdd_obj(mo), 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, BYPASS_CAPA); if (!IS_ERR(it)) { result = iops->get(env, it, (const void *)""); 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); } static int __mdd_may_link(const struct lu_env *env, struct mdd_object *obj) { struct mdd_device *m = mdd_obj2mdd_dev(obj); struct lu_attr *la = &mdd_env_info(env)->mti_la; int rc; ENTRY; rc = mdd_la_get(env, obj, la, BYPASS_CAPA); if (rc) RETURN(rc); /* * Subdir count limitation can be broken through. */ if (la->la_nlink >= m->mdd_dt_conf.ddp_max_nlink && !S_ISDIR(la->la_mode)) RETURN(-EMLINK); else RETURN(0); } /* * Check whether it may create the cobj under the pobj. * cobj maybe NULL */ int mdd_may_create(const struct lu_env *env, struct mdd_object *pobj, struct mdd_object *cobj, int check_perm, int check_nlink) { int rc = 0; ENTRY; if (cobj && mdd_object_exists(cobj)) RETURN(-EEXIST); if (mdd_is_dead_obj(pobj)) RETURN(-ENOENT); if (check_perm) rc = mdd_permission_internal_locked(env, pobj, NULL, MAY_WRITE | MAY_EXEC, MOR_TGT_PARENT); if (!rc && check_nlink) rc = __mdd_may_link(env, pobj); 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 *attr) { int rc; ENTRY; if (mdd_is_dead_obj(pobj)) RETURN(-ENOENT); if ((attr->la_valid & LA_FLAGS) && (attr->la_flags & (LUSTRE_APPEND_FL | LUSTRE_IMMUTABLE_FL))) RETURN(-EPERM); rc = mdd_permission_internal_locked(env, pobj, NULL, MAY_WRITE | MAY_EXEC, MOR_TGT_PARENT); if (rc) RETURN(rc); if (mdd_is_append(pobj)) 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, struct mdd_object *cobj) { struct lu_attr *tmp_la = &mdd_env_info(env)->mti_la; struct lu_ucred *uc = lu_ucred_assert(env); int rc; if (pobj) { rc = mdd_la_get(env, pobj, tmp_la, BYPASS_CAPA); if (rc) return rc; if (!(tmp_la->la_mode & S_ISVTX) || (tmp_la->la_uid == uc->uc_fsuid)) return 0; } rc = mdd_la_get(env, cobj, tmp_la, BYPASS_CAPA); if (rc) return rc; if (tmp_la->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, 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, NULL, MAY_WRITE | MAY_EXEC, MOR_TGT_PARENT); if (rc) RETURN(rc); } if (mdd_is_append(pobj)) 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 *pobj, struct mdd_object *cobj, struct lu_attr *cattr, struct lu_attr *src_attr, int check_perm, int check_empty) { int rc = 0; ENTRY; if (pobj) { rc = mdd_may_delete_entry(env, pobj, check_perm); if (rc != 0) RETURN(rc); } if (cobj == NULL) RETURN(0); if (!mdd_object_exists(cobj)) RETURN(-ENOENT); if (mdd_is_dead_obj(cobj)) RETURN(-ESTALE); if (mdd_is_sticky(env, pobj, cobj)) RETURN(-EPERM); if (mdd_is_immutable(cobj) || mdd_is_append(cobj)) RETURN(-EPERM); if ((cattr->la_valid & LA_FLAGS) && (cattr->la_flags & (LUSTRE_APPEND_FL | LUSTRE_IMMUTABLE_FL))) RETURN(-EPERM); /* additional check the rename case */ if (src_attr) { if (S_ISDIR(src_attr->la_mode)) { struct mdd_device *mdd = mdo2mdd(&cobj->mod_obj); if (!S_ISDIR(cattr->la_mode)) RETURN(-ENOTDIR); if (lu_fid_eq(mdo2fid(cobj), &mdd->mdd_root_fid)) RETURN(-EBUSY); } else if (S_ISDIR(cattr->la_mode)) RETURN(-EISDIR); } if (S_ISDIR(cattr->la_mode) && check_empty) rc = mdd_dir_is_empty(env, cobj); RETURN(rc); } /* * tgt maybe NULL * has mdd_write_lock on src already, but not on tgt yet */ int mdd_link_sanity_check(const struct lu_env *env, struct mdd_object *tgt_obj, const struct lu_name *lname, struct mdd_object *src_obj) { 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. */ if (lname && (lname->ln_namelen > m->mdd_dt_conf.ddp_max_name_len)) RETURN(-ENAMETOOLONG); if (mdd_is_immutable(src_obj) || mdd_is_append(src_obj)) RETURN(-EPERM); if (S_ISDIR(mdd_object_type(src_obj))) RETURN(-EPERM); LASSERT(src_obj != tgt_obj); if (tgt_obj) { rc = mdd_may_create(env, tgt_obj, NULL, 1, 0); if (rc) RETURN(rc); } rc = __mdd_may_link(env, src_obj); RETURN(rc); } static int __mdd_index_delete_only(const struct lu_env *env, struct mdd_object *pobj, const char *name, struct thandle *handle, struct lustre_capa *capa) { struct dt_object *next = mdd_object_child(pobj); int rc; ENTRY; if (dt_try_as_dir(env, next)) { rc = next->do_index_ops->dio_delete(env, next, (struct dt_key *)name, handle, capa); } 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, const char *name, struct thandle *handle, struct lustre_capa *capa) { struct dt_object *next = mdd_object_child(pobj); int rc; ENTRY; if (dt_try_as_dir(env, next)) { struct lu_ucred *uc = lu_ucred_check(env); int ignore_quota; ignore_quota = uc ? uc->uc_cap & CFS_CAP_SYS_RESOURCE_MASK : 1; rc = next->do_index_ops->dio_insert(env, next, (struct dt_rec*)lf, (const struct dt_key *)name, handle, capa, 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, const char *name, int is_dir, struct thandle *handle, struct lustre_capa *capa) { int rc; ENTRY; rc = __mdd_index_insert_only(env, pobj, lf, name, handle, capa); if (rc == 0 && is_dir) { 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, struct lustre_capa *capa) { int rc; ENTRY; rc = __mdd_index_delete_only(env, pobj, name, handle, capa); 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); } int mdd_declare_changelog_store(const struct lu_env *env, struct mdd_device *mdd, const struct lu_name *fname, struct thandle *handle) { struct obd_device *obd = mdd2obd_dev(mdd); struct llog_ctxt *ctxt; struct llog_changelog_rec *rec; struct lu_buf *buf; int reclen; int rc; /* Not recording */ if (!(mdd->mdd_cl.mc_flags & CLM_ON)) return 0; reclen = llog_data_len(sizeof(*rec) + (fname != NULL ? fname->ln_namelen : 0)); 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; rc = llog_declare_add(env, ctxt->loc_handle, &rec->cr_hdr, handle); llog_ctxt_put(ctxt); return rc; } static int mdd_declare_changelog_ext_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_ext_rec *rec; struct lu_buf *buf; int reclen; int rc; /* Not recording */ if (!(mdd->mdd_cl.mc_flags & CLM_ON)) return 0; reclen = llog_data_len(sizeof(*rec) + (tname != NULL ? tname->ln_namelen : 0) + (sname != NULL ? 1 + sname->ln_namelen : 0)); 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; rc = llog_declare_add(env, ctxt->loc_handle, &rec->cr_hdr, handle); 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; int rc; rec->cr_hdr.lrh_len = llog_data_len(sizeof(*rec) + rec->cr.cr_namelen); 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; rc = llog_add(env, ctxt->loc_handle, &rec->cr_hdr, NULL, NULL, th); llog_ctxt_put(ctxt); if (rc > 0) rc = 0; return rc; } /** Add a changelog_ext 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_ext_store(const struct lu_env *env, struct mdd_device *mdd, struct llog_changelog_ext_rec *rec, struct thandle *th) { struct obd_device *obd = mdd2obd_dev(mdd); struct llog_ctxt *ctxt; int rc; rec->cr_hdr.lrh_len = llog_data_len(sizeof(*rec) + rec->cr.cr_namelen); /* llog_lvfs_write_rec sets the llog tail len */ rec->cr_hdr.lrh_type = CHANGELOG_REC; rec->cr.cr_time = cl_time(); 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; /* nested journal transaction */ rc = llog_add(env, ctxt->loc_handle, &rec->cr_hdr, NULL, NULL, th); llog_ctxt_put(ctxt); if (rc > 0) rc = 0; return rc; } /** 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 parent - parent dir/object * \param tname - target 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, unsigned flags, struct mdd_object *target, struct mdd_object *parent, const struct lu_name *tname, struct thandle *handle) { 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(target != NULL); LASSERT(parent != NULL); LASSERT(tname != NULL); LASSERT(handle != NULL); reclen = llog_data_len(sizeof(*rec) + tname->ln_namelen); 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.cr_flags = CLF_VERSION | (CLF_FLAGMASK & flags); rec->cr.cr_type = (__u32)type; rec->cr.cr_tfid = *mdo2fid(target); rec->cr.cr_pfid = *mdo2fid(parent); rec->cr.cr_namelen = tname->ln_namelen; memcpy(rec->cr.cr_name, tname->ln_name, tname->ln_namelen); target->mod_cltime = cfs_time_current_64(); 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(&rec->cr.cr_tfid), PFID(&rec->cr.cr_pfid)); RETURN(-EFAULT); } RETURN(0); } /** 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 */ static int mdd_changelog_ext_ns_store(const struct lu_env *env, struct mdd_device *mdd, enum changelog_rec_type type, unsigned flags, 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) { struct llog_changelog_ext_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(sfid != NULL); LASSERT(tpfid != NULL); LASSERT(tname != NULL); LASSERT(handle != NULL); reclen = llog_data_len(sizeof(*rec) + sname != NULL ? 1 + sname->ln_namelen : 0); 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.cr_flags = CLF_EXT_VERSION | (CLF_FLAGMASK & flags); rec->cr.cr_type = (__u32)type; rec->cr.cr_pfid = *tpfid; rec->cr.cr_sfid = *sfid; rec->cr.cr_spfid = *spfid; rec->cr.cr_namelen = tname->ln_namelen; memcpy(rec->cr.cr_name, tname->ln_name, tname->ln_namelen); if (sname) { rec->cr.cr_name[tname->ln_namelen] = '\0'; memcpy(rec->cr.cr_name + tname->ln_namelen + 1, sname->ln_name, sname->ln_namelen); rec->cr.cr_namelen += 1 + sname->ln_namelen; } 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_ext_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 rc2 = 0; 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) rc = rc2; if (rc) { 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 *data, int first) { return mdd_links_rename(env, mdd_obj, NULL, NULL, pfid, lname, handle, data, 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; /* 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; if (!mdd_object_exists(mdd_obj)) return -ENODATA; rc = mdo_xattr_get(env, mdd_obj, ldata->ld_buf, XATTR_NAME_LINK, BYPASS_CAPA); 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, BYPASS_CAPA); 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, BYPASS_CAPA); } if (rc < 0) 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 = { 0 }; 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); return mdo_xattr_set(env, mdd_obj, buf, XATTR_NAME_LINK, 0, handle, mdd_object_capa(env, mdd_obj)); } int mdd_declare_links_add(const struct lu_env *env, struct mdd_object *mdd_obj, struct thandle *handle, struct linkea_data *ldata) { int rc; int ea_len; void *linkea; if (ldata != NULL && ldata->ld_lee != 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); 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); 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), name->ln_name,handle); if (rc) return rc; rc = mdo_declare_ref_add(env, c, handle); if (rc) 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) return rc; rc = mdd_declare_links_add(env, c, handle, data); if (rc) return rc; rc = mdd_declare_changelog_store(env, mdd, name, 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 mdd_device *mdd = mdo2mdd(src_obj); struct dynlock_handle *dlh; struct thandle *handle; struct linkea_data *ldata = &mdd_env_info(env)->mti_link_data; int rc; ENTRY; 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); dlh = mdd_pdo_write_lock(env, mdd_tobj, name, MOR_TGT_CHILD); if (dlh == NULL) GOTO(out_trans, rc = -ENOMEM); mdd_write_lock(env, mdd_sobj, MOR_TGT_CHILD); rc = mdd_link_sanity_check(env, mdd_tobj, lname, mdd_sobj); if (rc) GOTO(out_unlock, rc); rc = mdo_ref_add(env, mdd_sobj, handle); if (rc) GOTO(out_unlock, rc); rc = __mdd_index_insert_only(env, mdd_tobj, mdo2fid(mdd_sobj), name, handle, mdd_object_capa(env, mdd_tobj)); if (rc != 0) { mdo_ref_del(env, mdd_sobj, handle); GOTO(out_unlock, rc); } la->la_valid = LA_CTIME | LA_MTIME; rc = mdd_attr_check_set_internal(env, mdd_tobj, la, handle, 0); if (rc) GOTO(out_unlock, rc); la->la_valid = LA_CTIME; rc = mdd_attr_check_set_internal(env, mdd_sobj, la, handle, 0); 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); mdd_pdo_write_unlock(env, mdd_tobj, dlh); out_trans: if (rc == 0) rc = mdd_changelog_ns_store(env, mdd, CL_HARDLINK, 0, mdd_sobj, mdd_tobj, lname, 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; } int mdd_declare_finish_unlink(const struct lu_env *env, struct mdd_object *obj, struct md_attr *ma, struct thandle *handle) { int rc; rc = orph_declare_index_insert(env, obj, mdd_object_type(obj), handle); if (rc) return rc; return mdo_declare_destroy(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, 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) { obj->mod_flags |= DEAD_OBJ; /* 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); } } 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, struct mdd_object *cobj, struct lu_attr *cattr) { int rc; ENTRY; rc = mdd_may_delete(env, pobj, 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) { struct lu_attr *la = &mdd_env_info(env)->mti_la_for_fix; int rc; if (likely(no_name == 0)) { rc = mdo_declare_index_delete(env, p, name->ln_name, handle); if (rc) return rc; } rc = mdo_declare_ref_del(env, p, handle); if (rc) 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, ma, handle); if (rc) return rc; rc = mdd_declare_links_del(env, c, handle); if (rc != 0) return rc; /* FIXME: need changelog for remove entry */ rc = mdd_declare_changelog_store(env, mdd, name, 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, mdd_object_capa(env, obj)); 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 *cattr = &mdd_env_info(env)->mti_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 dynlock_handle *dlh; 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); /* currently it is assume, it could only delete * name entry of remote directory */ is_dir = 1; } 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); if (rc) GOTO(stop, rc); rc = mdd_trans_start(env, mdd, handle); if (rc) GOTO(stop, rc); dlh = mdd_pdo_write_lock(env, mdd_pobj, name, MOR_TGT_PARENT); if (dlh == NULL) GOTO(stop, rc = -ENOMEM); if (likely(mdd_cobj != NULL)) { mdd_write_lock(env, mdd_cobj, MOR_TGT_CHILD); /* fetch cattr */ rc = mdd_la_get(env, mdd_cobj, cattr, mdd_object_capa(env, mdd_cobj)); if (rc) GOTO(cleanup, rc); is_dir = S_ISDIR(cattr->la_mode); } rc = mdd_unlink_sanity_check(env, mdd_pobj, mdd_cobj, cattr); if (rc) GOTO(cleanup, rc); if (likely(no_name == 0)) { rc = __mdd_index_delete(env, mdd_pobj, name, is_dir, handle, mdd_object_capa(env, mdd_pobj)); if (rc) GOTO(cleanup, rc); } 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), name, handle, mdd_object_capa(env, mdd_pobj)); 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, mdd_object_capa(env, mdd_cobj)); 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_attr_check_set_internal(env, mdd_pobj, la, handle, 0); if (rc) GOTO(cleanup, rc); /* Enough for only unlink the entry */ if (unlikely(mdd_cobj == NULL)) { mdd_pdo_write_unlock(env, mdd_pobj, dlh); 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_attr_check_set_internal(env, mdd_cobj, la, handle, 0); 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, handle); /* fetch updated nlink */ if (rc == 0) rc = mdd_la_get(env, mdd_cobj, cattr, mdd_object_capa(env, mdd_cobj)); if (!is_dir) /* old files may not have link ea; ignore errors */ mdd_links_del(env, mdd_cobj, mdo2fid(mdd_pobj), lname, handle); /* 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: mdd_write_unlock(env, mdd_cobj); mdd_pdo_write_unlock(env, mdd_pobj, dlh); 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, mdd_pobj, lname, 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_info(env)->mti_cattr; 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, mdd_object_capa(env, son)); if (rc) RETURN(rc); /* calling ->ah_make_hint() is used to transfer information from parent */ mdd_object_make_hint(env, mdd_pobj, son, attr); 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) { /* replay case or lfs setstripe */ 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, 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, mdd_object_capa(env, son)); 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); } /* Get fid from name and parent */ static int __mdd_lookup(const struct lu_env *env, struct md_object *pobj, 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); } /* The common filename length check. */ if (unlikely(lname->ln_namelen > m->mdd_dt_conf.ddp_max_name_len)) RETURN(-ENAMETOOLONG); rc = mdd_permission_internal_locked(env, mdd_obj, NULL, mask, MOR_TGT_PARENT); if (rc) RETURN(rc); if (likely(S_ISDIR(mdd_object_type(mdd_obj)) && dt_try_as_dir(env, dir))) { rc = dir->do_index_ops->dio_lookup(env, dir, (struct dt_rec *)fid, key, mdd_object_capa(env, mdd_obj)); if (rc > 0) rc = 0; else if (rc == 0) rc = -ENOENT; } else rc = -ENOTDIR; 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, struct linkea_data *ldata) { 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)) { rc = mdo_declare_index_insert(env, child, mdo2fid(child), dot, handle); if (rc == 0) rc = mdo_declare_ref_add(env, child, handle); rc = mdo_declare_index_insert(env, child, mdo2fid(parent), dotdot, handle); } if (rc == 0) mdd_declare_links_add(env, child, handle, ldata); RETURN(rc); } static int mdd_object_initialize(const struct lu_env *env, const struct lu_fid *pfid, const struct lu_name *lname, struct mdd_object *child, struct lu_attr *attr, struct thandle *handle, const struct md_op_spec *spec, struct linkea_data *ldata) { int rc; ENTRY; /* * Update attributes for child. * * FIXME: * (1) the valid bits should be converted between Lustre and Linux; * (2) maybe, the child attributes should be set in OSD when creation. */ rc = mdd_attr_set_internal(env, child, attr, handle, 0); /* arguments are supposed to stay the same */ 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), dot, handle, BYPASS_CAPA); if (rc == 0) rc = __mdd_index_insert_only(env, child, pfid, dotdot, handle, BYPASS_CAPA); if (rc != 0) mdo_ref_del(env, child, handle); } if (rc == 0) mdd_links_add(env, child, pfid, lname, handle, ldata, 1); RETURN(rc); } /* has not lock on pobj yet */ static int mdd_create_sanity_check(const struct lu_env *env, struct md_object *pobj, 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); 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_locked(env, pobj, lname, fid, MAY_WRITE | MAY_EXEC); if (rc != -ENOENT) RETURN(rc ? : -EEXIST); } else { /* * Check WRITE permission for the parent. * EXEC permission have been checked * when lookup before create already. */ rc = mdd_permission_internal_locked(env, obj, pattr, MAY_WRITE, MOR_TGT_PARENT); if (rc) 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; } } 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_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) { int rc; rc = mdd_declare_object_create_internal(env, p, c, attr, handle, spec); 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 if (S_ISDIR(attr->la_mode)) { rc = mdo_declare_ref_add(env, p, handle); if (rc) GOTO(out, rc); } rc = mdd_declare_object_initialize(env, p, c, attr, handle, ldata); if (rc) GOTO(out, rc); if (spec->sp_cr_flags & MDS_OPEN_VOLATILE) rc = orph_declare_index_insert(env, c, attr->la_mode, handle); else rc = mdo_declare_index_insert(env, p, mdo2fid(c), name->ln_name, 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)) { 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)) { rc = dt_declare_record_write(env, mdd_object_child(c), strlen(spec->u.sp_symname), 0, handle); if (rc) GOTO(out, rc); } if (!(spec->sp_cr_flags & MDS_OPEN_VOLATILE)) { rc = mdo_declare_attr_set(env, p, attr, handle); if (rc) return rc; } rc = mdd_declare_changelog_store(env, mdd, name, 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, BYPASS_CAPA); 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 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; struct dynlock_handle *dlh; const char *name = lname->ln_name; int rc, created = 0, initialized = 0, inserted = 0; 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, BYPASS_CAPA); 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); 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_free, rc); mdd_object_make_hint(env, mdd_pobj, son, attr); handle = mdd_trans_create(env, mdd); if (IS_ERR(handle)) GOTO(out_free, rc = PTR_ERR(handle)); memset(ldata, 0, sizeof(*ldata)); 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); if (rc) GOTO(out_stop, rc); rc = mdd_trans_start(env, mdd, handle); if (rc) GOTO(out_stop, rc); dlh = mdd_pdo_write_lock(env, mdd_pobj, name, MOR_TGT_PARENT); if (dlh == NULL) GOTO(out_trans, rc = -ENOMEM); mdd_write_lock(env, son, MOR_TGT_CHILD); rc = mdd_object_create_internal(env, NULL, son, attr, handle, spec); if (rc) { mdd_write_unlock(env, son); GOTO(cleanup, rc); } created = 1; #ifdef CONFIG_FS_POSIX_ACL if (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, BYPASS_CAPA); if (rc) { mdd_write_unlock(env, son); GOTO(cleanup, rc); } } /* set its own acl */ if (acl_buf.lb_len > 0) { rc = mdo_xattr_set(env, son, &acl_buf, XATTR_NAME_ACL_ACCESS, 0, handle, BYPASS_CAPA); if (rc) { mdd_write_unlock(env, son); GOTO(cleanup, rc); } } #endif rc = mdd_object_initialize(env, mdo2fid(mdd_pobj), lname, son, attr, handle, spec, ldata); /* * 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. */ if (rc == 0 && (spec->no_create || (spec->sp_cr_flags & MDS_OPEN_HAS_EA))) { 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, XATTR_NAME_LOV, 0, handle, BYPASS_CAPA); } if (rc == 0 && spec->sp_cr_flags & MDS_OPEN_VOLATILE) rc = __mdd_orphan_add(env, son, handle); mdd_write_unlock(env, son); if (rc != 0) /* * Object has no links, so it will be destroyed when last * reference is released. (XXX not now.) */ GOTO(cleanup, rc); initialized = 1; if (!(spec->sp_cr_flags & MDS_OPEN_VOLATILE)) rc = __mdd_index_insert(env, mdd_pobj, mdo2fid(son), name, S_ISDIR(attr->la_mode), handle, mdd_object_capa(env, mdd_pobj)); if (rc != 0) GOTO(cleanup, rc); inserted = 1; 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, mdd_object_capa(env, son), uc->uc_cap & CFS_CAP_SYS_RESOURCE_MASK); if (rc == sym_len) rc = 0; else GOTO(cleanup, rc = -EFAULT); } /* volatile file creation does not update parent directory times */ if (spec->sp_cr_flags & MDS_OPEN_VOLATILE) GOTO(cleanup, rc = 0); /* update parent directory mtime/ctime */ *la = *attr; la->la_valid = LA_CTIME | LA_MTIME; rc = mdd_attr_check_set_internal(env, mdd_pobj, la, handle, 0); if (rc) GOTO(cleanup, rc); EXIT; cleanup: if (rc != 0 && created != 0) { int rc2; if (inserted != 0) { 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, BYPASS_CAPA); if (rc2 != 0) goto out_stop; } mdd_write_lock(env, son, MOR_TGT_CHILD); if (initialized != 0 && 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) { mdd_write_unlock(env, son); goto out_stop; } } rc2 = mdo_ref_del(env, son, handle); if (rc2 != 0) { mdd_write_unlock(env, son); goto out_stop; } mdo_destroy(env, son, handle); mdd_write_unlock(env, son); } mdd_pdo_write_unlock(env, mdd_pobj, dlh); out_trans: if (rc == 0 && fid_is_namespace_visible(mdo2fid(son))) 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, mdd_pobj, lname, handle); out_stop: mdd_trans_stop(env, mdd, rc, handle); 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, 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, 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, struct mdd_object *tgt_pobj, struct mdd_object *sobj, struct mdd_object *tobj, struct lu_attr *so_attr, struct lu_attr *tg_attr) { 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, sobj, so_attr, 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) rc = mdd_may_create(env, tgt_pobj, NULL, (src_pobj != tgt_pobj), 0); else rc = mdd_may_delete(env, tgt_pobj, tobj, tg_attr, so_attr, (src_pobj != tgt_pobj), 1); if (!rc && !tobj && (src_pobj != tgt_pobj) && S_ISDIR(so_attr->la_mode)) rc = __mdd_may_link(env, tgt_pobj); 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) return rc; rc = mdo_declare_index_insert(env, mdd_sobj, mdo2fid(mdd_tpobj), dotdot, handle); if (rc) 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) 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); if (rc) return rc; /* new name */ rc = mdo_declare_index_insert(env, mdd_tpobj, mdo2fid(mdd_sobj), tname->ln_name, handle); if (rc) 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_links_del(env, mdd_tobj, handle); if (rc) return rc; rc = mdd_declare_finish_unlink(env, mdd_tobj, ma, handle); if (rc) return rc; } rc = mdd_declare_changelog_ext_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 lu_attr *so_attr = &mdd_env_info(env)->mti_cattr; struct lu_attr *tg_attr = &mdd_env_info(env)->mti_pattr; 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 dynlock_handle *sdlh = NULL, *tdlh = NULL; 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, so_attr, mdd_object_capa(env, mdd_sobj)); if (rc) GOTO(out_pending, rc); if (mdd_tobj) { rc = mdd_la_get(env, mdd_tobj, tg_attr, mdd_object_capa(env, mdd_tobj)); if (rc) GOTO(out_pending, rc); } rc = mdd_rename_sanity_check(env, mdd_spobj, mdd_tpobj, mdd_sobj, mdd_tobj, so_attr, tg_attr); if (rc) 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, mdd_tpobj); if (rc < 0) GOTO(cleanup_unlocked, rc); /* Get locks in determined order */ if (rc == MDD_RN_SAME) { sdlh = mdd_pdo_write_lock(env, mdd_spobj, sname, MOR_SRC_PARENT); /* check hashes to determine do we need one lock or two */ if (mdd_name2hash(sname) != mdd_name2hash(tname)) tdlh = mdd_pdo_write_lock(env, mdd_tpobj, tname, MOR_TGT_PARENT); else tdlh = sdlh; } else if (rc == MDD_RN_SRCTGT) { sdlh = mdd_pdo_write_lock(env, mdd_spobj, sname,MOR_SRC_PARENT); tdlh = mdd_pdo_write_lock(env, mdd_tpobj, tname,MOR_TGT_PARENT); } else { tdlh = mdd_pdo_write_lock(env, mdd_tpobj, tname,MOR_SRC_PARENT); sdlh = mdd_pdo_write_lock(env, mdd_spobj, sname,MOR_TGT_PARENT); } if (sdlh == NULL || tdlh == NULL) GOTO(cleanup, rc = -ENOMEM); is_dir = S_ISDIR(so_attr->la_mode); /* Remove source name from source directory */ rc = __mdd_index_delete(env, mdd_spobj, sname, is_dir, handle, mdd_object_capa(env, mdd_spobj)); 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, mdd_object_capa(env, mdd_sobj)); if (rc) GOTO(fixup_spobj2, rc); rc = __mdd_index_insert_only(env, mdd_sobj, tpobj_fid, dotdot, handle, mdd_object_capa(env, mdd_sobj)); if (rc) 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, mdd_object_capa(env, mdd_tpobj)); 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, tname, is_dir, handle, mdd_object_capa(env, mdd_tpobj)); if (rc) 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_attr_check_set_internal(env, mdd_sobj, la, handle, 0); 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(tg_attr->la_mode)) mdo_ref_del(env, mdd_tobj, handle); tobj_ref = 1; /* fetch updated nlink */ rc = mdd_la_get(env, mdd_tobj, tg_attr, mdd_object_capa(env, mdd_tobj)); 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_attr_check_set_internal(env, mdd_tobj, la, handle, 0); 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 = *tg_attr; ma->ma_valid |= MA_INODE; rc = mdd_finish_unlink(env, mdd_tobj, ma, 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, tg_attr, mdd_object_capa(env, mdd_tobj)); 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 = *tg_attr; ma->ma_valid |= MA_INODE; if (tg_attr->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_attr_check_set_internal(env, mdd_spobj, la, handle, 0); if (rc) GOTO(fixup_tpobj, rc); if (mdd_spobj != mdd_tpobj) { la->la_valid = LA_CTIME | LA_MTIME; rc = mdd_attr_check_set_internal(env, mdd_tpobj, la, handle, 0); } 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, BYPASS_CAPA); 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), tname, is_dir, handle, BYPASS_CAPA); if (rc2) CWARN("tp obj fix error %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, BYPASS_CAPA); 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, dotdot, handle, BYPASS_CAPA); if (rc2) CWARN("%s: sp obj dotdot insert error: rc = %d\n", mdd2obd_dev(mdd)->obd_name, rc2); } fixup_spobj2: if (rc) { rc2 = __mdd_index_insert(env, mdd_spobj, lf, sname, is_dir, handle, BYPASS_CAPA); if (rc2) CWARN("sp obj fix error %d\n",rc2); } cleanup: if (tobj_locked) mdd_write_unlock(env, mdd_tobj); if (likely(tdlh) && sdlh != tdlh) mdd_pdo_write_unlock(env, mdd_tpobj, tdlh); if (likely(sdlh)) mdd_pdo_write_unlock(env, mdd_spobj, sdlh); cleanup_unlocked: if (rc == 0) rc = mdd_changelog_ext_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; } 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, };