/* * 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, 2012, Intel Corporation. */ /* * This file is part of Lustre, http://www.lustre.org/ * Lustre is a trademark of Sun Microsystems, Inc. * * lustre/mdt/mdt_reint.c * * Lustre Metadata Target (mdt) reintegration routines * * Author: Peter Braam * Author: Andreas Dilger * Author: Phil Schwan * Author: Huang Hua * Author: Yury Umanets */ #define DEBUG_SUBSYSTEM S_MDS #include "mdt_internal.h" #include "lu_time.h" static inline void mdt_reint_init_ma(struct mdt_thread_info *info, struct md_attr *ma) { ma->ma_need = MA_INODE; ma->ma_valid = 0; } static int mdt_create_pack_capa(struct mdt_thread_info *info, int rc, struct mdt_object *object, struct mdt_body *repbody) { ENTRY; /* for cross-ref mkdir, mds capa has been fetched from remote obj, then * we won't go to below*/ if (repbody->valid & OBD_MD_FLMDSCAPA) RETURN(rc); if (rc == 0 && info->mti_mdt->mdt_opts.mo_mds_capa && info->mti_exp->exp_connect_flags & OBD_CONNECT_MDS_CAPA) { struct lustre_capa *capa; capa = req_capsule_server_get(info->mti_pill, &RMF_CAPA1); LASSERT(capa); capa->lc_opc = CAPA_OPC_MDS_DEFAULT; rc = mo_capa_get(info->mti_env, mdt_object_child(object), capa, 0); if (rc == 0) repbody->valid |= OBD_MD_FLMDSCAPA; } RETURN(rc); } /** * Get version of object by fid. * * Return real version or ENOENT_VERSION if object doesn't exist */ static void mdt_obj_version_get(struct mdt_thread_info *info, struct mdt_object *o, __u64 *version) { LASSERT(o); LASSERT(mdt_object_exists(o) >= 0); if (mdt_object_exists(o) > 0 && !mdt_object_obf(o)) *version = dt_version_get(info->mti_env, mdt_obj2dt(o)); else *version = ENOENT_VERSION; CDEBUG(D_INODE, "FID "DFID" version is "LPX64"\n", PFID(mdt_object_fid(o)), *version); } /** * Check version is correct. * * Should be called only during replay. */ static int mdt_version_check(struct ptlrpc_request *req, __u64 version, int idx) { __u64 *pre_ver = lustre_msg_get_versions(req->rq_reqmsg); ENTRY; if (!exp_connect_vbr(req->rq_export)) RETURN(0); LASSERT(req_is_replay(req)); /** VBR: version is checked always because costs nothing */ LASSERT(idx < PTLRPC_NUM_VERSIONS); /** Sanity check for malformed buffers */ if (pre_ver == NULL) { CERROR("No versions in request buffer\n"); spin_lock(&req->rq_export->exp_lock); req->rq_export->exp_vbr_failed = 1; spin_unlock(&req->rq_export->exp_lock); RETURN(-EOVERFLOW); } else if (pre_ver[idx] != version) { CDEBUG(D_INODE, "Version mismatch "LPX64" != "LPX64"\n", pre_ver[idx], version); spin_lock(&req->rq_export->exp_lock); req->rq_export->exp_vbr_failed = 1; spin_unlock(&req->rq_export->exp_lock); RETURN(-EOVERFLOW); } RETURN(0); } /** * Save pre-versions in reply. */ static void mdt_version_save(struct ptlrpc_request *req, __u64 version, int idx) { __u64 *reply_ver; if (!exp_connect_vbr(req->rq_export)) return; LASSERT(!req_is_replay(req)); LASSERT(req->rq_repmsg != NULL); reply_ver = lustre_msg_get_versions(req->rq_repmsg); if (reply_ver) reply_ver[idx] = version; } /** * Save enoent version, it is needed when it is obvious that object doesn't * exist, e.g. child during create. */ static void mdt_enoent_version_save(struct mdt_thread_info *info, int idx) { /* save version of file name for replay, it must be ENOENT here */ if (!req_is_replay(mdt_info_req(info))) { info->mti_ver[idx] = ENOENT_VERSION; mdt_version_save(mdt_info_req(info), info->mti_ver[idx], idx); } } /** * Get version from disk and save in reply buffer. * * Versions are saved in reply only during normal operations not replays. */ void mdt_version_get_save(struct mdt_thread_info *info, struct mdt_object *mto, int idx) { /* don't save versions during replay */ if (!req_is_replay(mdt_info_req(info))) { mdt_obj_version_get(info, mto, &info->mti_ver[idx]); mdt_version_save(mdt_info_req(info), info->mti_ver[idx], idx); } } /** * Get version from disk and check it, no save in reply. */ int mdt_version_get_check(struct mdt_thread_info *info, struct mdt_object *mto, int idx) { /* only check versions during replay */ if (!req_is_replay(mdt_info_req(info))) return 0; mdt_obj_version_get(info, mto, &info->mti_ver[idx]); return mdt_version_check(mdt_info_req(info), info->mti_ver[idx], idx); } /** * Get version from disk and check if recovery or just save. */ int mdt_version_get_check_save(struct mdt_thread_info *info, struct mdt_object *mto, int idx) { int rc = 0; mdt_obj_version_get(info, mto, &info->mti_ver[idx]); if (req_is_replay(mdt_info_req(info))) rc = mdt_version_check(mdt_info_req(info), info->mti_ver[idx], idx); else mdt_version_save(mdt_info_req(info), info->mti_ver[idx], idx); return rc; } /** * Lookup with version checking. * * This checks version of 'name'. Many reint functions uses 'name' for child not * FID, therefore we need to get object by name and check its version. */ int mdt_lookup_version_check(struct mdt_thread_info *info, struct mdt_object *p, struct lu_name *lname, struct lu_fid *fid, int idx) { int rc, vbrc; rc = mdo_lookup(info->mti_env, mdt_object_child(p), lname, fid, &info->mti_spec); /* Check version only during replay */ if (!req_is_replay(mdt_info_req(info))) return rc; info->mti_ver[idx] = ENOENT_VERSION; if (rc == 0) { struct mdt_object *child; child = mdt_object_find(info->mti_env, info->mti_mdt, fid); if (likely(!IS_ERR(child))) { mdt_obj_version_get(info, child, &info->mti_ver[idx]); mdt_object_put(info->mti_env, child); } } vbrc = mdt_version_check(mdt_info_req(info), info->mti_ver[idx], idx); return vbrc ? vbrc : rc; } /* * VBR: we save three versions in reply: * 0 - parent. Check that parent version is the same during replay. * 1 - name. Version of 'name' if file exists with the same name or * ENOENT_VERSION, it is needed because file may appear due to missed replays. * 2 - child. Version of child by FID. Must be ENOENT. It is mostly sanity * check. */ static int mdt_md_create(struct mdt_thread_info *info) { struct mdt_device *mdt = info->mti_mdt; struct mdt_object *parent; struct mdt_object *child; struct mdt_lock_handle *lh; struct mdt_body *repbody; struct md_attr *ma = &info->mti_attr; struct mdt_reint_record *rr = &info->mti_rr; struct lu_name *lname; int rc; ENTRY; DEBUG_REQ(D_INODE, mdt_info_req(info), "Create (%s->"DFID") in "DFID, rr->rr_name, PFID(rr->rr_fid2), PFID(rr->rr_fid1)); repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY); lh = &info->mti_lh[MDT_LH_PARENT]; mdt_lock_pdo_init(lh, LCK_PW, rr->rr_name, rr->rr_namelen); parent = mdt_object_find_lock(info, rr->rr_fid1, lh, MDS_INODELOCK_UPDATE); if (IS_ERR(parent)) RETURN(PTR_ERR(parent)); if (mdt_object_obf(parent)) GOTO(out_put_parent, rc = -EPERM); rc = mdt_version_get_check_save(info, parent, 0); if (rc) GOTO(out_put_parent, rc); /* * Check child name version during replay. * During create replay a file may exist with same name. */ lname = mdt_name(info->mti_env, (char *)rr->rr_name, rr->rr_namelen); rc = mdt_lookup_version_check(info, parent, lname, &info->mti_tmp_fid1, 1); if (rc == 0) GOTO(out_put_parent, rc = -EEXIST); /* -ENOENT is expected here */ if (rc != -ENOENT) GOTO(out_put_parent, rc); /* save version of file name for replay, it must be ENOENT here */ mdt_enoent_version_save(info, 1); child = mdt_object_new(info->mti_env, mdt, rr->rr_fid2); if (likely(!IS_ERR(child))) { struct md_object *next = mdt_object_child(parent); ma->ma_need = MA_INODE; ma->ma_valid = 0; /* capa for cross-ref will be stored here */ ma->ma_capa = req_capsule_server_get(info->mti_pill, &RMF_CAPA1); LASSERT(ma->ma_capa); mdt_fail_write(info->mti_env, info->mti_mdt->mdt_bottom, OBD_FAIL_MDS_REINT_CREATE_WRITE); /* Version of child will be updated on disk. */ info->mti_mos = child; rc = mdt_version_get_check_save(info, child, 2); if (rc) GOTO(out_put_child, rc); /* Let lower layer know current lock mode. */ info->mti_spec.sp_cr_mode = mdt_dlm_mode2mdl_mode(lh->mlh_pdo_mode); /* * Do not perform lookup sanity check. We know that name does * not exist. */ info->mti_spec.sp_cr_lookup = 0; info->mti_spec.sp_feat = &dt_directory_features; rc = mdo_create(info->mti_env, next, lname, mdt_object_child(child), &info->mti_spec, ma); if (rc == 0) rc = mdt_attr_get_complex(info, child, ma); if (rc == 0) { /* Return fid & attr to client. */ if (ma->ma_valid & MA_INODE) mdt_pack_attr2body(info, repbody, &ma->ma_attr, mdt_object_fid(child)); } out_put_child: mdt_object_put(info->mti_env, child); } else { rc = PTR_ERR(child); } mdt_create_pack_capa(info, rc, child, repbody); out_put_parent: mdt_object_unlock_put(info, parent, lh, rc); RETURN(rc); } int mdt_attr_set(struct mdt_thread_info *info, struct mdt_object *mo, struct md_attr *ma, int flags) { struct mdt_lock_handle *lh; int do_vbr = ma->ma_attr.la_valid & (LA_MODE|LA_UID|LA_GID|LA_FLAGS); __u64 lockpart = MDS_INODELOCK_UPDATE; int rc; ENTRY; /* attr shouldn't be set on remote object */ LASSERT(mdt_object_exists(mo) >= 0); lh = &info->mti_lh[MDT_LH_PARENT]; mdt_lock_reg_init(lh, LCK_PW); if (ma->ma_attr.la_valid & (LA_MODE|LA_UID|LA_GID)) lockpart |= MDS_INODELOCK_LOOKUP; rc = mdt_object_lock(info, mo, lh, lockpart, MDT_LOCAL_LOCK); if (rc != 0) RETURN(rc); if (mdt_object_exists(mo) == 0) GOTO(out_unlock, rc = -ENOENT); /* all attrs are packed into mti_attr in unpack_setattr */ mdt_fail_write(info->mti_env, info->mti_mdt->mdt_bottom, OBD_FAIL_MDS_REINT_SETATTR_WRITE); /* This is only for set ctime when rename's source is on remote MDS. */ if (unlikely(ma->ma_attr.la_valid == LA_CTIME)) ma->ma_attr_flags |= MDS_VTX_BYPASS; /* VBR: update version if attr changed are important for recovery */ if (do_vbr) { /* update on-disk version of changed object */ info->mti_mos = mo; rc = mdt_version_get_check_save(info, mo, 0); if (rc) GOTO(out_unlock, rc); } /* all attrs are packed into mti_attr in unpack_setattr */ rc = mo_attr_set(info->mti_env, mdt_object_child(mo), ma); if (rc != 0) GOTO(out_unlock, rc); EXIT; out_unlock: mdt_object_unlock(info, mo, lh, rc); return rc; } static int mdt_reint_setattr(struct mdt_thread_info *info, struct mdt_lock_handle *lhc) { struct md_attr *ma = &info->mti_attr; struct mdt_reint_record *rr = &info->mti_rr; struct ptlrpc_request *req = mdt_info_req(info); struct mdt_export_data *med = &req->rq_export->exp_mdt_data; struct mdt_file_data *mfd; struct mdt_object *mo; struct mdt_body *repbody; int som_au, rc, rc2; ENTRY; DEBUG_REQ(D_INODE, req, "setattr "DFID" %x", PFID(rr->rr_fid1), (unsigned int)ma->ma_attr.la_valid); if (info->mti_dlm_req) ldlm_request_cancel(req, info->mti_dlm_req, 0); repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY); mo = mdt_object_find(info->mti_env, info->mti_mdt, rr->rr_fid1); if (IS_ERR(mo)) GOTO(out, rc = PTR_ERR(mo)); if (mdt_object_obf(mo)) GOTO(out_put, rc = -EPERM); /* start a log jounal handle if needed */ if (!(mdt_conn_flags(info) & OBD_CONNECT_SOM)) { if ((ma->ma_attr.la_valid & LA_SIZE) || (rr->rr_flags & MRF_OPEN_TRUNC)) { /* Check write access for the O_TRUNC case */ if (mdt_write_read(mo) < 0) GOTO(out_put, rc = -ETXTBSY); } } else if (info->mti_ioepoch && (info->mti_ioepoch->flags & MF_EPOCH_OPEN)) { /* Truncate case. IOEpoch is opened. */ rc = mdt_write_get(mo); if (rc) GOTO(out_put, rc); mfd = mdt_mfd_new(); if (mfd == NULL) { mdt_write_put(mo); GOTO(out_put, rc = -ENOMEM); } mdt_ioepoch_open(info, mo, 0); repbody->ioepoch = mo->mot_ioepoch; mdt_object_get(info->mti_env, mo); mdt_mfd_set_mode(mfd, MDS_FMODE_TRUNC); mfd->mfd_object = mo; mfd->mfd_xid = req->rq_xid; spin_lock(&med->med_open_lock); cfs_list_add(&mfd->mfd_list, &med->med_open_head); spin_unlock(&med->med_open_lock); repbody->handle.cookie = mfd->mfd_handle.h_cookie; } som_au = info->mti_ioepoch && info->mti_ioepoch->flags & MF_SOM_CHANGE; if (som_au) { /* SOM Attribute update case. Find the proper mfd and update * SOM attributes on the proper object. */ LASSERT(mdt_conn_flags(info) & OBD_CONNECT_SOM); LASSERT(info->mti_ioepoch); spin_lock(&med->med_open_lock); mfd = mdt_handle2mfd(info, &info->mti_ioepoch->handle); if (mfd == NULL) { spin_unlock(&med->med_open_lock); CDEBUG(D_INODE, "no handle for file close: " "fid = "DFID": cookie = "LPX64"\n", PFID(info->mti_rr.rr_fid1), info->mti_ioepoch->handle.cookie); GOTO(out_put, rc = -ESTALE); } LASSERT(mfd->mfd_mode == MDS_FMODE_SOM); LASSERT(!(info->mti_ioepoch->flags & MF_EPOCH_CLOSE)); class_handle_unhash(&mfd->mfd_handle); cfs_list_del_init(&mfd->mfd_list); spin_unlock(&med->med_open_lock); mdt_mfd_close(info, mfd); } else if ((ma->ma_valid & MA_INODE) && ma->ma_attr.la_valid) { LASSERT((ma->ma_valid & MA_LOV) == 0); rc = mdt_attr_set(info, mo, ma, rr->rr_flags); if (rc) GOTO(out_put, rc); } else if ((ma->ma_valid & MA_LOV) && (ma->ma_valid & MA_INODE)) { struct lu_buf *buf = &info->mti_buf; LASSERT(ma->ma_attr.la_valid == 0); buf->lb_buf = ma->ma_lmm; buf->lb_len = ma->ma_lmm_size; rc = mo_xattr_set(info->mti_env, mdt_object_child(mo), buf, XATTR_NAME_LOV, 0); if (rc) GOTO(out_put, rc); } else LBUG(); ma->ma_need = MA_INODE; ma->ma_valid = 0; rc = mdt_attr_get_complex(info, mo, ma); if (rc != 0) GOTO(out_put, rc); mdt_pack_attr2body(info, repbody, &ma->ma_attr, mdt_object_fid(mo)); if (info->mti_mdt->mdt_opts.mo_oss_capa && info->mti_exp->exp_connect_flags & OBD_CONNECT_OSS_CAPA && S_ISREG(lu_object_attr(&mo->mot_obj.mo_lu)) && (ma->ma_attr.la_valid & LA_SIZE) && !som_au) { struct lustre_capa *capa; capa = req_capsule_server_get(info->mti_pill, &RMF_CAPA2); LASSERT(capa); capa->lc_opc = CAPA_OPC_OSS_DEFAULT | CAPA_OPC_OSS_TRUNC; rc = mo_capa_get(info->mti_env, mdt_object_child(mo), capa, 0); if (rc) GOTO(out_put, rc); repbody->valid |= OBD_MD_FLOSSCAPA; } EXIT; out_put: mdt_object_put(info->mti_env, mo); out: if (rc == 0) mdt_counter_incr(req, LPROC_MDT_SETATTR); mdt_client_compatibility(info); rc2 = mdt_fix_reply(info); if (rc == 0) rc = rc2; return rc; } static int mdt_reint_create(struct mdt_thread_info *info, struct mdt_lock_handle *lhc) { struct ptlrpc_request *req = mdt_info_req(info); int rc; ENTRY; if (OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_CREATE)) RETURN(err_serious(-ESTALE)); if (info->mti_dlm_req) ldlm_request_cancel(mdt_info_req(info), info->mti_dlm_req, 0); LASSERT(info->mti_rr.rr_namelen > 0); switch (info->mti_attr.ma_attr.la_mode & S_IFMT) { case S_IFDIR: mdt_counter_incr(req, LPROC_MDT_MKDIR); break; case S_IFREG: case S_IFLNK: case S_IFCHR: case S_IFBLK: case S_IFIFO: case S_IFSOCK: /* Special file should stay on the same node as parent. */ mdt_counter_incr(req, LPROC_MDT_MKNOD); break; default: CERROR("%s: Unsupported mode %o\n", mdt2obd_dev(info->mti_mdt)->obd_name, info->mti_attr.ma_attr.la_mode); RETURN(err_serious(-EOPNOTSUPP)); } rc = mdt_md_create(info); RETURN(rc); } /* * VBR: save parent version in reply and child version getting by its name. * Version of child is getting and checking during its lookup. If */ static int mdt_reint_unlink(struct mdt_thread_info *info, struct mdt_lock_handle *lhc) { struct mdt_reint_record *rr = &info->mti_rr; struct ptlrpc_request *req = mdt_info_req(info); struct md_attr *ma = &info->mti_attr; struct lu_fid *child_fid = &info->mti_tmp_fid1; struct mdt_object *mp; struct mdt_object *mc; struct mdt_lock_handle *parent_lh; struct mdt_lock_handle *child_lh; struct lu_name *lname; int rc; ENTRY; DEBUG_REQ(D_INODE, req, "unlink "DFID"/%s", PFID(rr->rr_fid1), rr->rr_name); if (info->mti_dlm_req) ldlm_request_cancel(req, info->mti_dlm_req, 0); if (OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_UNLINK)) RETURN(err_serious(-ENOENT)); /* * step 1: lock the parent. */ parent_lh = &info->mti_lh[MDT_LH_PARENT]; mdt_lock_pdo_init(parent_lh, LCK_PW, rr->rr_name, rr->rr_namelen); mp = mdt_object_find_lock(info, rr->rr_fid1, parent_lh, MDS_INODELOCK_UPDATE); if (IS_ERR(mp)) GOTO(out, rc = PTR_ERR(mp)); if (mdt_object_obf(mp)) GOTO(out_unlock_parent, rc = -EPERM); rc = mdt_version_get_check_save(info, mp, 0); if (rc) GOTO(out_unlock_parent, rc); mdt_reint_init_ma(info, ma); /* step 2: find & lock the child */ lname = mdt_name(info->mti_env, (char *)rr->rr_name, rr->rr_namelen); /* lookup child object along with version checking */ fid_zero(child_fid); rc = mdt_lookup_version_check(info, mp, lname, child_fid, 1); if (rc != 0) GOTO(out_unlock_parent, rc); /* We will lock the child regardless it is local or remote. No harm. */ mc = mdt_object_find(info->mti_env, info->mti_mdt, child_fid); if (IS_ERR(mc)) GOTO(out_unlock_parent, rc = PTR_ERR(mc)); child_lh = &info->mti_lh[MDT_LH_CHILD]; mdt_lock_reg_init(child_lh, LCK_EX); rc = mdt_object_lock(info, mc, child_lh, MDS_INODELOCK_FULL, MDT_CROSS_LOCK); if (rc != 0) { mdt_object_put(info->mti_env, mc); GOTO(out_unlock_parent, rc); } mdt_fail_write(info->mti_env, info->mti_mdt->mdt_bottom, OBD_FAIL_MDS_REINT_UNLINK_WRITE); /* save version when object is locked */ mdt_version_get_save(info, mc, 1); /* * Now we can only make sure we need MA_INODE, in mdd layer, will check * whether need MA_LOV and MA_COOKIE. */ ma->ma_need = MA_INODE; ma->ma_valid = 0; mdt_set_capainfo(info, 1, child_fid, BYPASS_CAPA); rc = mdo_unlink(info->mti_env, mdt_object_child(mp), mdt_object_child(mc), lname, ma); if (rc == 0 && !lu_object_is_dying(&mc->mot_header)) rc = mdt_attr_get_complex(info, mc, ma); if (rc == 0) mdt_handle_last_unlink(info, mc, ma); if (ma->ma_valid & MA_INODE) { switch (ma->ma_attr.la_mode & S_IFMT) { case S_IFDIR: mdt_counter_incr(req, LPROC_MDT_RMDIR); break; case S_IFREG: case S_IFLNK: case S_IFCHR: case S_IFBLK: case S_IFIFO: case S_IFSOCK: mdt_counter_incr(req, LPROC_MDT_UNLINK); break; default: LASSERTF(0, "bad file type %o unlinking\n", ma->ma_attr.la_mode); } } EXIT; mdt_object_unlock_put(info, mc, child_lh, rc); out_unlock_parent: mdt_object_unlock_put(info, mp, parent_lh, rc); out: return rc; } /* * VBR: save versions in reply: 0 - parent; 1 - child by fid; 2 - target by * name. */ static int mdt_reint_link(struct mdt_thread_info *info, struct mdt_lock_handle *lhc) { struct mdt_reint_record *rr = &info->mti_rr; struct ptlrpc_request *req = mdt_info_req(info); struct md_attr *ma = &info->mti_attr; struct mdt_object *ms; struct mdt_object *mp; struct mdt_lock_handle *lhs; struct mdt_lock_handle *lhp; struct lu_name *lname; int rc; ENTRY; DEBUG_REQ(D_INODE, req, "link "DFID" to "DFID"/%s", PFID(rr->rr_fid1), PFID(rr->rr_fid2), rr->rr_name); if (OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_LINK)) RETURN(err_serious(-ENOENT)); if (info->mti_dlm_req) ldlm_request_cancel(req, info->mti_dlm_req, 0); /* Invalid case so return error immediately instead of * processing it */ if (lu_fid_eq(rr->rr_fid1, rr->rr_fid2)) RETURN(-EPERM); /* step 1: find & lock the target parent dir */ lhp = &info->mti_lh[MDT_LH_PARENT]; mdt_lock_pdo_init(lhp, LCK_PW, rr->rr_name, rr->rr_namelen); mp = mdt_object_find_lock(info, rr->rr_fid2, lhp, MDS_INODELOCK_UPDATE); if (IS_ERR(mp)) RETURN(PTR_ERR(mp)); if (mdt_object_obf(mp)) GOTO(out_unlock_parent, rc = -EPERM); rc = mdt_version_get_check_save(info, mp, 0); if (rc) GOTO(out_unlock_parent, rc); /* step 2: find & lock the source */ lhs = &info->mti_lh[MDT_LH_CHILD]; mdt_lock_reg_init(lhs, LCK_EX); ms = mdt_object_find(info->mti_env, info->mti_mdt, rr->rr_fid1); if (IS_ERR(ms)) GOTO(out_unlock_parent, rc = PTR_ERR(ms)); rc = mdt_object_lock(info, ms, lhs, MDS_INODELOCK_UPDATE, MDT_CROSS_LOCK); if (rc != 0) { mdt_object_put(info->mti_env, ms); GOTO(out_unlock_parent, rc); } /* step 3: link it */ mdt_fail_write(info->mti_env, info->mti_mdt->mdt_bottom, OBD_FAIL_MDS_REINT_LINK_WRITE); info->mti_mos = ms; rc = mdt_version_get_check_save(info, ms, 1); if (rc) GOTO(out_unlock_child, rc); lname = mdt_name(info->mti_env, (char *)rr->rr_name, rr->rr_namelen); /** check target version by name during replay */ rc = mdt_lookup_version_check(info, mp, lname, &info->mti_tmp_fid1, 2); if (rc != 0 && rc != -ENOENT) GOTO(out_unlock_child, rc); /* save version of file name for replay, it must be ENOENT here */ if (!req_is_replay(mdt_info_req(info))) { info->mti_ver[2] = ENOENT_VERSION; mdt_version_save(mdt_info_req(info), info->mti_ver[2], 2); } rc = mdo_link(info->mti_env, mdt_object_child(mp), mdt_object_child(ms), lname, ma); if (rc == 0) mdt_counter_incr(req, LPROC_MDT_LINK); EXIT; out_unlock_child: mdt_object_unlock_put(info, ms, lhs, rc); out_unlock_parent: mdt_object_unlock_put(info, mp, lhp, rc); return rc; } /** * lock the part of the directory according to the hash of the name * (lh->mlh_pdo_hash) in parallel directory lock. */ static int mdt_pdir_hash_lock(struct mdt_thread_info *info, struct mdt_lock_handle *lh, struct mdt_object *obj, __u64 ibits) { struct ldlm_res_id *res_id = &info->mti_res_id; struct ldlm_namespace *ns = info->mti_mdt->mdt_namespace; ldlm_policy_data_t *policy = &info->mti_policy; int rc; /* * Finish res_id initializing by name hash marking part of * directory which is taking modification. */ LASSERT(lh->mlh_pdo_hash != 0); fid_build_pdo_res_name(mdt_object_fid(obj), lh->mlh_pdo_hash, res_id); memset(policy, 0, sizeof(*policy)); policy->l_inodebits.bits = ibits; /* * Use LDLM_FL_LOCAL_ONLY for this lock. We do not know yet if it is * going to be sent to client. If it is - mdt_intent_policy() path will * fix it up and turn FL_LOCAL flag off. */ rc = mdt_fid_lock(ns, &lh->mlh_reg_lh, lh->mlh_reg_mode, policy, res_id, LDLM_FL_LOCAL_ONLY | LDLM_FL_ATOMIC_CB, &info->mti_exp->exp_handle.h_cookie); return rc; } static int mdt_rename_lock(struct mdt_thread_info *info, struct lustre_handle *lh) { struct ldlm_namespace *ns = info->mti_mdt->mdt_namespace; ldlm_policy_data_t *policy = &info->mti_policy; struct ldlm_res_id *res_id = &info->mti_res_id; __u64 flags = 0; struct md_site *ms; int rc; ENTRY; ms = mdt_md_site(info->mti_mdt); fid_build_reg_res_name(&LUSTRE_BFL_FID, res_id); memset(policy, 0, sizeof *policy); policy->l_inodebits.bits = MDS_INODELOCK_UPDATE; if (ms->ms_control_exp == NULL) { flags = LDLM_FL_LOCAL_ONLY | LDLM_FL_ATOMIC_CB; /* * Current node is controller, that is mdt0, where we should * take BFL lock. */ rc = ldlm_cli_enqueue_local(ns, res_id, LDLM_IBITS, policy, LCK_EX, &flags, ldlm_blocking_ast, ldlm_completion_ast, NULL, NULL, 0, LVB_T_NONE, &info->mti_exp->exp_handle.h_cookie, lh); } else { struct ldlm_enqueue_info einfo = { LDLM_IBITS, LCK_EX, ldlm_blocking_ast, ldlm_completion_ast, NULL, NULL, NULL }; /* * This is the case mdt0 is remote node, issue DLM lock like * other clients. */ rc = ldlm_cli_enqueue(ms->ms_control_exp, NULL, &einfo, res_id, policy, &flags, NULL, 0, LVB_T_NONE, lh, 0); } RETURN(rc); } static void mdt_rename_unlock(struct lustre_handle *lh) { ENTRY; LASSERT(lustre_handle_is_used(lh)); ldlm_lock_decref(lh, LCK_EX); EXIT; } /* * This is is_subdir() variant, it is CMD if cmm forwards it to correct * target. Source should not be ancestor of target dir. May be other rename * checks can be moved here later. */ static int mdt_rename_sanity(struct mdt_thread_info *info, struct lu_fid *fid) { struct mdt_reint_record *rr = &info->mti_rr; struct lu_fid dst_fid = *rr->rr_fid2; struct mdt_object *dst; int rc = 0; ENTRY; do { LASSERT(fid_is_sane(&dst_fid)); dst = mdt_object_find(info->mti_env, info->mti_mdt, &dst_fid); if (!IS_ERR(dst)) { rc = mdo_is_subdir(info->mti_env, mdt_object_child(dst), fid, &dst_fid); mdt_object_put(info->mti_env, dst); if (rc != -EREMOTE && rc < 0) { CERROR("Failed mdo_is_subdir(), rc %d\n", rc); } else { /* check the found fid */ if (lu_fid_eq(&dst_fid, fid)) rc = -EINVAL; } } else { rc = PTR_ERR(dst); } } while (rc == -EREMOTE); RETURN(rc); } /* * VBR: rename versions in reply: 0 - src parent; 1 - tgt parent; * 2 - src child; 3 - tgt child. * Update on disk version of src child. */ static int mdt_reint_rename(struct mdt_thread_info *info, struct mdt_lock_handle *lhc) { struct mdt_reint_record *rr = &info->mti_rr; struct md_attr *ma = &info->mti_attr; struct ptlrpc_request *req = mdt_info_req(info); struct mdt_object *msrcdir; struct mdt_object *mtgtdir; struct mdt_object *mold; struct mdt_object *mnew = NULL; struct mdt_lock_handle *lh_srcdirp; struct mdt_lock_handle *lh_tgtdirp; struct mdt_lock_handle *lh_oldp; struct mdt_lock_handle *lh_newp; struct lu_fid *old_fid = &info->mti_tmp_fid1; struct lu_fid *new_fid = &info->mti_tmp_fid2; struct lustre_handle rename_lh = { 0 }; struct lu_name slname = { 0 }; struct lu_name *lname; int rc; ENTRY; if (info->mti_dlm_req) ldlm_request_cancel(req, info->mti_dlm_req, 0); DEBUG_REQ(D_INODE, req, "rename "DFID"/%s to "DFID"/%s", PFID(rr->rr_fid1), rr->rr_name, PFID(rr->rr_fid2), rr->rr_tgt); rc = mdt_rename_lock(info, &rename_lh); if (rc) { CERROR("Can't lock FS for rename, rc %d\n", rc); RETURN(rc); } lh_newp = &info->mti_lh[MDT_LH_NEW]; /* step 1: lock the source dir. */ lh_srcdirp = &info->mti_lh[MDT_LH_PARENT]; mdt_lock_pdo_init(lh_srcdirp, LCK_PW, rr->rr_name, rr->rr_namelen); msrcdir = mdt_object_find_lock(info, rr->rr_fid1, lh_srcdirp, MDS_INODELOCK_UPDATE); if (IS_ERR(msrcdir)) GOTO(out_rename_lock, rc = PTR_ERR(msrcdir)); if (mdt_object_obf(msrcdir)) GOTO(out_unlock_source, rc = -EPERM); rc = mdt_version_get_check_save(info, msrcdir, 0); if (rc) GOTO(out_unlock_source, rc); /* step 2: find & lock the target dir. */ lh_tgtdirp = &info->mti_lh[MDT_LH_CHILD]; mdt_lock_pdo_init(lh_tgtdirp, LCK_PW, rr->rr_tgt, rr->rr_tgtlen); if (lu_fid_eq(rr->rr_fid1, rr->rr_fid2)) { mdt_object_get(info->mti_env, msrcdir); mtgtdir = msrcdir; if (lh_tgtdirp->mlh_pdo_hash != lh_srcdirp->mlh_pdo_hash) { rc = mdt_pdir_hash_lock(info, lh_tgtdirp, mtgtdir, MDS_INODELOCK_UPDATE); if (rc) GOTO(out_unlock_source, rc); OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_PDO_LOCK2, 10); } } else { mtgtdir = mdt_object_find(info->mti_env, info->mti_mdt, rr->rr_fid2); if (IS_ERR(mtgtdir)) GOTO(out_unlock_source, rc = PTR_ERR(mtgtdir)); if (mdt_object_obf(mtgtdir)) GOTO(out_put_target, rc = -EPERM); /* check early, the real version will be saved after locking */ rc = mdt_version_get_check(info, mtgtdir, 1); if (rc) GOTO(out_put_target, rc); rc = mdt_object_exists(mtgtdir); if (rc == 0) { GOTO(out_put_target, rc = -ESTALE); } else if (rc > 0) { /* we lock the target dir if it is local */ rc = mdt_object_lock(info, mtgtdir, lh_tgtdirp, MDS_INODELOCK_UPDATE, MDT_LOCAL_LOCK); if (rc != 0) GOTO(out_put_target, rc); /* get and save correct version after locking */ mdt_version_get_save(info, mtgtdir, 1); } } /* step 3: find & lock the old object. */ lname = mdt_name(info->mti_env, (char *)rr->rr_name, rr->rr_namelen); mdt_name_copy(&slname, lname); fid_zero(old_fid); rc = mdt_lookup_version_check(info, msrcdir, &slname, old_fid, 2); if (rc != 0) GOTO(out_unlock_target, rc); if (lu_fid_eq(old_fid, rr->rr_fid1) || lu_fid_eq(old_fid, rr->rr_fid2)) GOTO(out_unlock_target, rc = -EINVAL); mold = mdt_object_find(info->mti_env, info->mti_mdt, old_fid); if (IS_ERR(mold)) GOTO(out_unlock_target, rc = PTR_ERR(mold)); if (mdt_object_obf(mold)) { mdt_object_put(info->mti_env, mold); GOTO(out_unlock_target, rc = -EPERM); } lh_oldp = &info->mti_lh[MDT_LH_OLD]; mdt_lock_reg_init(lh_oldp, LCK_EX); rc = mdt_object_lock(info, mold, lh_oldp, MDS_INODELOCK_LOOKUP, MDT_CROSS_LOCK); if (rc != 0) { mdt_object_put(info->mti_env, mold); GOTO(out_unlock_target, rc); } info->mti_mos = mold; /* save version after locking */ mdt_version_get_save(info, mold, 2); mdt_set_capainfo(info, 2, old_fid, BYPASS_CAPA); /* step 4: find & lock the new object. */ /* new target object may not exist now */ lname = mdt_name(info->mti_env, (char *)rr->rr_tgt, rr->rr_tgtlen); /* lookup with version checking */ fid_zero(new_fid); rc = mdt_lookup_version_check(info, mtgtdir, lname, new_fid, 3); if (rc == 0) { /* the new_fid should have been filled at this moment */ if (lu_fid_eq(old_fid, new_fid)) GOTO(out_unlock_old, rc); if (lu_fid_eq(new_fid, rr->rr_fid1) || lu_fid_eq(new_fid, rr->rr_fid2)) GOTO(out_unlock_old, rc = -EINVAL); mdt_lock_reg_init(lh_newp, LCK_EX); mnew = mdt_object_find(info->mti_env, info->mti_mdt, new_fid); if (IS_ERR(mnew)) GOTO(out_unlock_old, rc = PTR_ERR(mnew)); if (mdt_object_obf(mnew)) { mdt_object_put(info->mti_env, mnew); GOTO(out_unlock_old, rc = -EPERM); } rc = mdt_object_lock(info, mnew, lh_newp, MDS_INODELOCK_FULL, MDT_CROSS_LOCK); if (rc != 0) { mdt_object_put(info->mti_env, mnew); GOTO(out_unlock_old, rc); } /* get and save version after locking */ mdt_version_get_save(info, mnew, 3); mdt_set_capainfo(info, 3, new_fid, BYPASS_CAPA); } else if (rc != -EREMOTE && rc != -ENOENT) { GOTO(out_unlock_old, rc); } else { mdt_enoent_version_save(info, 3); } /* step 5: rename it */ mdt_reint_init_ma(info, ma); mdt_fail_write(info->mti_env, info->mti_mdt->mdt_bottom, OBD_FAIL_MDS_REINT_RENAME_WRITE); /* Check if @dst is subdir of @src. */ rc = mdt_rename_sanity(info, old_fid); if (rc) GOTO(out_unlock_new, rc); rc = mdo_rename(info->mti_env, mdt_object_child(msrcdir), mdt_object_child(mtgtdir), old_fid, &slname, (mnew ? mdt_object_child(mnew) : NULL), lname, ma); /* handle last link of tgt object */ if (rc == 0) { mdt_counter_incr(req, LPROC_MDT_RENAME); if (mnew) mdt_handle_last_unlink(info, mnew, ma); mdt_rename_counter_tally(info, info->mti_mdt, req, msrcdir, mtgtdir); } EXIT; out_unlock_new: if (mnew) mdt_object_unlock_put(info, mnew, lh_newp, rc); out_unlock_old: mdt_object_unlock_put(info, mold, lh_oldp, rc); out_unlock_target: mdt_object_unlock(info, mtgtdir, lh_tgtdirp, rc); out_put_target: mdt_object_put(info->mti_env, mtgtdir); out_unlock_source: mdt_object_unlock_put(info, msrcdir, lh_srcdirp, rc); out_rename_lock: mdt_rename_unlock(&rename_lh); return rc; } typedef int (*mdt_reinter)(struct mdt_thread_info *info, struct mdt_lock_handle *lhc); static mdt_reinter reinters[REINT_MAX] = { [REINT_SETATTR] = mdt_reint_setattr, [REINT_CREATE] = mdt_reint_create, [REINT_LINK] = mdt_reint_link, [REINT_UNLINK] = mdt_reint_unlink, [REINT_RENAME] = mdt_reint_rename, [REINT_OPEN] = mdt_reint_open, [REINT_SETXATTR] = mdt_reint_setxattr }; int mdt_reint_rec(struct mdt_thread_info *info, struct mdt_lock_handle *lhc) { int rc; ENTRY; rc = reinters[info->mti_rr.rr_opcode](info, lhc); RETURN(rc); }