/* * 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.gnu.org/licenses/gpl-2.0.html * * GPL HEADER END */ /* * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved. * Use is subject to license terms. * * Copyright (c) 2011, 2017, 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 #include "mdt_internal.h" #include 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; } /** * 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); if (mdt_object_exists(o) && !mdt_object_remote(o) && !fid_is_obf(mdt_object_fid(o))) *version = dt_version_get(info->mti_env, mdt_obj2dt(o)); else *version = ENOENT_VERSION; CDEBUG(D_INODE, "FID "DFID" version is %#llx\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 %#llx != %#llx\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, const 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; } static int mdt_unlock_slaves(struct mdt_thread_info *mti, struct mdt_object *obj, struct ldlm_enqueue_info *einfo, int decref) { union ldlm_policy_data *policy = &mti->mti_policy; struct mdt_lock_handle *lh = &mti->mti_lh[MDT_LH_LOCAL]; struct lustre_handle_array *slave_locks = einfo->ei_cbdata; int i; LASSERT(S_ISDIR(obj->mot_header.loh_attr)); LASSERT(slave_locks); memset(policy, 0, sizeof(*policy)); policy->l_inodebits.bits = einfo->ei_inodebits; mdt_lock_handle_init(lh); mdt_lock_reg_init(lh, einfo->ei_mode); for (i = 0; i < slave_locks->ha_count; i++) { if (test_bit(i, (void *)slave_locks->ha_map)) lh->mlh_rreg_lh = slave_locks->ha_handles[i]; else lh->mlh_reg_lh = slave_locks->ha_handles[i]; mdt_object_unlock(mti, NULL, lh, decref); slave_locks->ha_handles[i].cookie = 0ull; } return mo_object_unlock(mti->mti_env, mdt_object_child(obj), einfo, policy); } static inline int mdt_object_striped(struct mdt_thread_info *mti, struct mdt_object *obj) { struct lu_device *bottom_dev; struct lu_object *bottom_obj; int rc; if (!S_ISDIR(obj->mot_header.loh_attr)) return 0; /* getxattr from bottom obj to avoid reading in shard FIDs */ bottom_dev = dt2lu_dev(mti->mti_mdt->mdt_bottom); bottom_obj = lu_object_find_slice(mti->mti_env, bottom_dev, mdt_object_fid(obj), NULL); if (IS_ERR(bottom_obj)) return PTR_ERR(bottom_obj); rc = dt_xattr_get(mti->mti_env, lu2dt(bottom_obj), &LU_BUF_NULL, XATTR_NAME_LMV); lu_object_put(mti->mti_env, bottom_obj); return (rc > 0) ? 1 : (rc == -ENODATA) ? 0 : rc; } /** * Lock slave stripes if necessary, the lock handles of slave stripes * will be stored in einfo->ei_cbdata. **/ static int mdt_lock_slaves(struct mdt_thread_info *mti, struct mdt_object *obj, enum ldlm_mode mode, __u64 ibits, struct ldlm_enqueue_info *einfo) { union ldlm_policy_data *policy = &mti->mti_policy; LASSERT(S_ISDIR(obj->mot_header.loh_attr)); einfo->ei_type = LDLM_IBITS; einfo->ei_mode = mode; einfo->ei_cb_bl = mdt_remote_blocking_ast; einfo->ei_cb_local_bl = mdt_blocking_ast; einfo->ei_cb_cp = ldlm_completion_ast; einfo->ei_enq_slave = 1; einfo->ei_namespace = mti->mti_mdt->mdt_namespace; einfo->ei_inodebits = ibits; memset(policy, 0, sizeof(*policy)); policy->l_inodebits.bits = ibits; return mo_object_lock(mti->mti_env, mdt_object_child(obj), NULL, einfo, policy); } int mdt_reint_striped_lock(struct mdt_thread_info *info, struct mdt_object *o, struct mdt_lock_handle *lh, __u64 ibits, struct ldlm_enqueue_info *einfo, bool cos_incompat) { int rc; LASSERT(!mdt_object_remote(o)); memset(einfo, 0, sizeof(*einfo)); rc = mdt_reint_object_lock(info, o, lh, ibits, cos_incompat); if (rc) return rc; rc = mdt_object_striped(info, o); if (rc != 1) { if (rc < 0) mdt_object_unlock(info, o, lh, rc); return rc; } rc = mdt_lock_slaves(info, o, lh->mlh_reg_mode, ibits, einfo); if (rc) { mdt_object_unlock(info, o, lh, rc); if (rc == -EIO && OBD_FAIL_CHECK(OBD_FAIL_LFSCK_BAD_SLAVE_NAME)) rc = 0; } return rc; } void mdt_reint_striped_unlock(struct mdt_thread_info *info, struct mdt_object *o, struct mdt_lock_handle *lh, struct ldlm_enqueue_info *einfo, int decref) { if (einfo->ei_cbdata) mdt_unlock_slaves(info, o, einfo, decref); mdt_object_unlock(info, o, lh, decref); } static int mdt_restripe(struct mdt_thread_info *info, struct mdt_object *parent, const struct lu_name *lname, const struct lu_fid *tfid, struct md_op_spec *spec, struct md_attr *ma) { struct mdt_device *mdt = info->mti_mdt; struct lu_fid *fid = &info->mti_tmp_fid2; struct ldlm_enqueue_info *einfo = &info->mti_einfo[0]; struct lmv_mds_md_v1 *lmv; struct mdt_object *child; struct mdt_lock_handle *lhp; struct mdt_lock_handle *lhc; struct mdt_body *repbody; int rc; ENTRY; if (!mdt->mdt_enable_dir_restripe) RETURN(-EPERM); rc = mdt_version_get_check_save(info, parent, 0); if (rc) RETURN(rc); lhp = &info->mti_lh[MDT_LH_PARENT]; mdt_lock_pdo_init(lhp, LCK_PW, lname); rc = mdt_reint_object_lock(info, parent, lhp, MDS_INODELOCK_UPDATE, true); if (rc) RETURN(rc); rc = mdt_stripe_get(info, parent, ma, XATTR_NAME_LMV); if (rc) GOTO(unlock_parent, rc); if (ma->ma_valid & MA_LMV) { /* don't allow restripe if parent dir layout is changing */ lmv = &ma->ma_lmv->lmv_md_v1; if (!lmv_is_sane(lmv)) GOTO(unlock_parent, rc = -EBADF); if (lmv_is_layout_changing(lmv)) GOTO(unlock_parent, rc = -EBUSY); } fid_zero(fid); rc = mdt_lookup_version_check(info, parent, lname, fid, 1); if (rc) GOTO(unlock_parent, rc); child = mdt_object_find(info->mti_env, mdt, fid); if (IS_ERR(child)) GOTO(unlock_parent, rc = PTR_ERR(child)); if (!mdt_object_exists(child)) GOTO(out_child, rc = -ENOENT); if (mdt_object_remote(child)) { struct mdt_body *repbody; repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY); if (!repbody) GOTO(out_child, rc = -EPROTO); repbody->mbo_fid1 = *fid; repbody->mbo_valid |= (OBD_MD_FLID | OBD_MD_MDS); GOTO(out_child, rc = -EREMOTE); } /* lock object */ lhc = &info->mti_lh[MDT_LH_CHILD]; mdt_lock_reg_init(lhc, LCK_EX); /* enqueue object remote LOOKUP lock */ if (mdt_object_remote(parent)) { rc = mdt_remote_object_lock(info, parent, fid, &lhc->mlh_rreg_lh, lhc->mlh_rreg_mode, MDS_INODELOCK_LOOKUP, false); if (rc != ELDLM_OK) GOTO(out_child, rc); } rc = mdt_reint_striped_lock(info, child, lhc, MDS_INODELOCK_FULL, einfo, true); if (rc) GOTO(unlock_child, rc); tgt_vbr_obj_set(info->mti_env, mdt_obj2dt(child)); rc = mdt_version_get_check_save(info, child, 1); if (rc) GOTO(unlock_child, rc); spin_lock(&mdt->mdt_restriper.mdr_lock); if (child->mot_restriping) { /* race? */ spin_unlock(&mdt->mdt_restriper.mdr_lock); GOTO(unlock_child, rc = -EBUSY); } child->mot_restriping = 1; spin_unlock(&mdt->mdt_restriper.mdr_lock); *fid = *tfid; rc = mdt_restripe_internal(info, parent, child, lname, fid, spec, ma); if (rc) GOTO(restriping_clear, rc); repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY); if (!repbody) GOTO(restriping_clear, rc = -EPROTO); mdt_pack_attr2body(info, repbody, &ma->ma_attr, fid); EXIT; restriping_clear: child->mot_restriping = 0; unlock_child: mdt_reint_striped_unlock(info, child, lhc, einfo, rc); out_child: mdt_object_put(info->mti_env, child); unlock_parent: mdt_object_unlock(info, parent, lhp, rc); return 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_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 md_op_spec *spec = &info->mti_spec; bool restripe = false; int rc; ENTRY; DEBUG_REQ(D_INODE, mdt_info_req(info), "Create ("DNAME"->"DFID") in "DFID, PNAME(&rr->rr_name), PFID(rr->rr_fid2), PFID(rr->rr_fid1)); if (!fid_is_md_operative(rr->rr_fid1)) RETURN(-EPERM); if (S_ISDIR(ma->ma_attr.la_mode) && spec->u.sp_ea.eadata != NULL && spec->u.sp_ea.eadatalen != 0) { const struct lmv_user_md *lum = spec->u.sp_ea.eadata; struct lu_ucred *uc = mdt_ucred(info); struct obd_export *exp = mdt_info_req(info)->rq_export; /* Only new clients can create remote dir( >= 2.4) and * striped dir(>= 2.6), old client will return -ENOTSUPP */ if (!mdt_is_dne_client(exp)) RETURN(-ENOTSUPP); if (le32_to_cpu(lum->lum_stripe_count) > 1) { if (!mdt_is_striped_client(exp)) RETURN(-ENOTSUPP); if (!mdt->mdt_enable_striped_dir) RETURN(-EPERM); } else if (!mdt->mdt_enable_remote_dir) { RETURN(-EPERM); } if ((!(exp_connect_flags2(exp) & OBD_CONNECT2_CRUSH)) && (le32_to_cpu(lum->lum_hash_type) & LMV_HASH_TYPE_MASK) == LMV_HASH_TYPE_CRUSH) RETURN(-EPROTO); if (!md_capable(uc, CFS_CAP_SYS_ADMIN) && uc->uc_gid != mdt->mdt_enable_remote_dir_gid && mdt->mdt_enable_remote_dir_gid != -1) RETURN(-EPERM); /* restripe if later found dir exists */ if (le32_to_cpu(lum->lum_stripe_offset) == LMV_OFFSET_DEFAULT) restripe = true; } repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY); parent = mdt_object_find(info->mti_env, info->mti_mdt, rr->rr_fid1); if (IS_ERR(parent)) RETURN(PTR_ERR(parent)); if (!mdt_object_exists(parent)) GOTO(put_parent, rc = -ENOENT); /* * LU-10235: check if name exists locklessly first to avoid massive * lock recalls on existing directories. */ rc = mdt_lookup_version_check(info, parent, &rr->rr_name, &info->mti_tmp_fid1, 1); if (rc == 0) { if (!restripe) GOTO(put_parent, rc = -EEXIST); rc = mdt_restripe(info, parent, &rr->rr_name, rr->rr_fid2, spec, ma); } /* -ENOENT is expected here */ if (rc != -ENOENT) GOTO(put_parent, rc); /* save version of file name for replay, it must be ENOENT here */ mdt_enoent_version_save(info, 1); OBD_RACE(OBD_FAIL_MDS_CREATE_RACE); lh = &info->mti_lh[MDT_LH_PARENT]; mdt_lock_pdo_init(lh, LCK_PW, &rr->rr_name); rc = mdt_object_lock(info, parent, lh, MDS_INODELOCK_UPDATE); if (rc) GOTO(put_parent, rc); if (!mdt_object_remote(parent)) { rc = mdt_version_get_check_save(info, parent, 0); if (rc) GOTO(unlock_parent, rc); } child = mdt_object_new(info->mti_env, mdt, rr->rr_fid2); if (unlikely(IS_ERR(child))) GOTO(unlock_parent, rc = PTR_ERR(child)); ma->ma_need = MA_INODE; ma->ma_valid = 0; 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. */ tgt_vbr_obj_set(info->mti_env, mdt_obj2dt(child)); rc = mdt_version_get_check_save(info, child, 2); if (rc) GOTO(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, mdt_object_child(parent), &rr->rr_name, mdt_object_child(child), &info->mti_spec, ma); if (rc == 0) rc = mdt_attr_get_complex(info, child, ma); if (rc < 0) GOTO(put_child, rc); /* * On DNE, we need to eliminate dependey between 'mkdir a' and * 'mkdir a/b' if b is a striped directory, to achieve this, two * things are done below: * 1. save child and slaves lock. * 2. if the child is a striped directory, relock parent so to * compare against with COS locks to ensure parent was * committed to disk. */ if (mdt_slc_is_enabled(mdt) && S_ISDIR(ma->ma_attr.la_mode)) { struct mdt_lock_handle *lhc; struct ldlm_enqueue_info *einfo = &info->mti_einfo[0]; bool cos_incompat; rc = mdt_object_striped(info, child); if (rc < 0) GOTO(put_child, rc); cos_incompat = rc; if (cos_incompat) { if (!mdt_object_remote(parent)) { mdt_object_unlock(info, parent, lh, 1); mdt_lock_pdo_init(lh, LCK_PW, &rr->rr_name); rc = mdt_reint_object_lock(info, parent, lh, MDS_INODELOCK_UPDATE, true); if (rc) GOTO(put_child, rc); } } lhc = &info->mti_lh[MDT_LH_CHILD]; mdt_lock_handle_init(lhc); mdt_lock_reg_init(lhc, LCK_PW); rc = mdt_reint_striped_lock(info, child, lhc, MDS_INODELOCK_UPDATE, einfo, cos_incompat); if (rc) GOTO(put_child, rc); mdt_reint_striped_unlock(info, child, lhc, einfo, rc); } /* Return fid & attr to client. */ if (ma->ma_valid & MA_INODE) mdt_pack_attr2body(info, repbody, &ma->ma_attr, mdt_object_fid(child)); EXIT; put_child: mdt_object_put(info->mti_env, child); unlock_parent: mdt_object_unlock(info, parent, lh, rc); put_parent: mdt_object_put(info->mti_env, parent); return rc; } static int mdt_attr_set(struct mdt_thread_info *info, struct mdt_object *mo, struct md_attr *ma) { struct mdt_lock_handle *lh; int do_vbr = ma->ma_attr.la_valid & (LA_MODE | LA_UID | LA_GID | LA_PROJID | LA_FLAGS); __u64 lockpart = MDS_INODELOCK_UPDATE; struct ldlm_enqueue_info *einfo = &info->mti_einfo[0]; bool cos_incompat; int rc; ENTRY; rc = mdt_object_striped(info, mo); if (rc < 0) RETURN(rc); cos_incompat = rc; lh = &info->mti_lh[MDT_LH_PARENT]; mdt_lock_reg_init(lh, LCK_PW); /* Even though the new MDT will grant PERM lock to the old * client, but the old client will almost ignore that during * So it needs to revoke both LOOKUP and PERM lock here, so * both new and old client can cancel the dcache */ if (ma->ma_attr.la_valid & (LA_MODE|LA_UID|LA_GID)) lockpart |= MDS_INODELOCK_LOOKUP | MDS_INODELOCK_PERM; rc = mdt_reint_striped_lock(info, mo, lh, lockpart, einfo, cos_incompat); if (rc != 0) RETURN(rc); /* 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); /* VBR: update version if attr changed are important for recovery */ if (do_vbr) { /* update on-disk version of changed object */ tgt_vbr_obj_set(info->mti_env, mdt_obj2dt(mo)); rc = mdt_version_get_check_save(info, mo, 0); if (rc) GOTO(out_unlock, rc); } /* Ensure constant striping during chown(). See LU-2789. */ if (ma->ma_attr.la_valid & (LA_UID|LA_GID|LA_PROJID)) mutex_lock(&mo->mot_lov_mutex); /* all attrs are packed into mti_attr in unpack_setattr */ rc = mo_attr_set(info->mti_env, mdt_object_child(mo), ma); if (ma->ma_attr.la_valid & (LA_UID|LA_GID|LA_PROJID)) mutex_unlock(&mo->mot_lov_mutex); if (rc != 0) GOTO(out_unlock, rc); mdt_dom_obj_lvb_update(info->mti_env, mo, false); EXIT; out_unlock: mdt_reint_striped_unlock(info, mo, lh, einfo, rc); return rc; } /** * Check HSM flags and add HS_DIRTY flag if relevant. * * A file could be set dirty only if it has a copy in the backend (HS_EXISTS) * and is not RELEASED. */ int mdt_add_dirty_flag(struct mdt_thread_info *info, struct mdt_object *mo, struct md_attr *ma) { struct lu_ucred *uc = mdt_ucred(info); cfs_cap_t cap_saved; int rc; ENTRY; /* If the file was modified, add the dirty flag */ ma->ma_need = MA_HSM; rc = mdt_attr_get_complex(info, mo, ma); if (rc) { CERROR("file attribute read error for "DFID": %d.\n", PFID(mdt_object_fid(mo)), rc); RETURN(rc); } /* If an up2date copy exists in the backend, add dirty flag */ if ((ma->ma_valid & MA_HSM) && (ma->ma_hsm.mh_flags & HS_EXISTS) && !(ma->ma_hsm.mh_flags & (HS_DIRTY|HS_RELEASED))) { ma->ma_hsm.mh_flags |= HS_DIRTY; /* Bump cap so that closes from non-owner writers can * set the HSM state to dirty. */ cap_saved = uc->uc_cap; uc->uc_cap |= MD_CAP_TO_MASK(CFS_CAP_FOWNER); rc = mdt_hsm_attr_set(info, mo, &ma->ma_hsm); uc->uc_cap = cap_saved; if (rc) CERROR("file attribute change error for "DFID": %d\n", PFID(mdt_object_fid(mo)), rc); } RETURN(rc); } static int mdt_reint_setattr(struct mdt_thread_info *info, struct mdt_lock_handle *lhc) { struct mdt_device *mdt = info->mti_mdt; 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_object *mo; struct mdt_body *repbody; ktime_t kstart = ktime_get(); int 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, LATF_SKIP); OBD_RACE(OBD_FAIL_PTLRPC_RESEND_RACE); repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY); mo = mdt_object_find(info->mti_env, mdt, rr->rr_fid1); if (IS_ERR(mo)) GOTO(out, rc = PTR_ERR(mo)); if (!mdt_object_exists(mo)) GOTO(out_put, rc = -ENOENT); if (mdt_object_remote(mo)) GOTO(out_put, rc = -EREMOTE); ma->ma_enable_chprojid_gid = mdt->mdt_enable_chprojid_gid; /* revoke lease lock if size is going to be changed */ if (unlikely(ma->ma_attr.la_valid & LA_SIZE && !(ma->ma_attr_flags & MDS_TRUNC_KEEP_LEASE) && atomic_read(&mo->mot_lease_count) > 0)) { down_read(&mo->mot_open_sem); if (atomic_read(&mo->mot_lease_count) > 0) { /* lease exists */ lhc = &info->mti_lh[MDT_LH_LOCAL]; mdt_lock_reg_init(lhc, LCK_CW); rc = mdt_object_lock(info, mo, lhc, MDS_INODELOCK_OPEN); if (rc != 0) { up_read(&mo->mot_open_sem); GOTO(out_put, rc); } /* revoke lease lock */ mdt_object_unlock(info, mo, lhc, 1); } up_read(&mo->mot_open_sem); } 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); /* LU-10286: compatibility check for FLR. * Please check the comment in mdt_finish_open() for details */ if (!exp_connect_flr(info->mti_exp) || !exp_connect_overstriping(info->mti_exp)) { rc = mdt_big_xattr_get(info, mo, XATTR_NAME_LOV); if (rc < 0 && rc != -ENODATA) GOTO(out_put, rc); if (!exp_connect_flr(info->mti_exp)) { if (rc > 0 && mdt_lmm_is_flr(info->mti_big_lmm)) GOTO(out_put, rc = -EOPNOTSUPP); } if (!exp_connect_overstriping(info->mti_exp)) { if (rc > 0 && mdt_lmm_is_overstriping(info->mti_big_lmm)) GOTO(out_put, rc = -EOPNOTSUPP); } } /* For truncate, the file size sent from client * is believable, but the blocks are incorrect, * which makes the block size in LSOM attribute * inconsisent with the real block size. */ rc = mdt_lsom_update(info, mo, true); if (rc) GOTO(out_put, rc); } if ((ma->ma_valid & MA_INODE) && ma->ma_attr.la_valid) { if (ma->ma_valid & MA_LOV) GOTO(out_put, rc = -EPROTO); /* MDT supports FMD for regular files due to Data-on-MDT */ if (S_ISREG(lu_object_attr(&mo->mot_obj)) && ma->ma_attr.la_valid & (LA_ATIME | LA_MTIME | LA_CTIME)) tgt_fmd_update(info->mti_exp, mdt_object_fid(mo), req->rq_xid); rc = mdt_attr_set(info, mo, ma); if (rc) GOTO(out_put, rc); } else if ((ma->ma_valid & (MA_LOV | MA_LMV)) && (ma->ma_valid & MA_INODE)) { struct lu_buf *buf = &info->mti_buf; struct lu_ucred *uc = mdt_ucred(info); struct mdt_lock_handle *lh; const char *name; __u64 lockpart = MDS_INODELOCK_XATTR; /* reject if either remote or striped dir is disabled */ if (ma->ma_valid & MA_LMV) { if (!mdt->mdt_enable_remote_dir || !mdt->mdt_enable_striped_dir) GOTO(out_put, rc = -EPERM); if (!md_capable(uc, CFS_CAP_SYS_ADMIN) && uc->uc_gid != mdt->mdt_enable_remote_dir_gid && mdt->mdt_enable_remote_dir_gid != -1) GOTO(out_put, rc = -EPERM); } if (!S_ISDIR(lu_object_attr(&mo->mot_obj))) GOTO(out_put, rc = -ENOTDIR); if (ma->ma_attr.la_valid != 0) GOTO(out_put, rc = -EPROTO); if (ma->ma_valid & MA_LOV) { buf->lb_buf = ma->ma_lmm; buf->lb_len = ma->ma_lmm_size; name = XATTR_NAME_LOV; } else { struct lmv_user_md *lmu = &ma->ma_lmv->lmv_user_md; buf->lb_buf = lmu; buf->lb_len = ma->ma_lmv_size; name = XATTR_NAME_DEFAULT_LMV; /* force client to update dir default layout */ lockpart |= MDS_INODELOCK_LOOKUP; } lh = &info->mti_lh[MDT_LH_PARENT]; mdt_lock_reg_init(lh, LCK_PW); rc = mdt_object_lock(info, mo, lh, lockpart); if (rc != 0) GOTO(out_put, rc); rc = mo_xattr_set(info->mti_env, mdt_object_child(mo), buf, name, 0); mdt_object_unlock(info, mo, lh, rc); if (rc) GOTO(out_put, rc); } else { GOTO(out_put, rc = -EPROTO); } /* If file data is modified, add the dirty flag */ if (ma->ma_attr_flags & MDS_DATA_MODIFIED) rc = mdt_add_dirty_flag(info, mo, ma); 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)); EXIT; out_put: mdt_object_put(info->mti_env, mo); out: if (rc == 0) mdt_counter_incr(req, LPROC_MDT_SETATTR, ktime_us_delta(ktime_get(), kstart)); 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); ktime_t kstart = ktime_get(); 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, LATF_SKIP); if (!lu_name_is_valid(&info->mti_rr.rr_name)) RETURN(-EPROTO); switch (info->mti_attr.ma_attr.la_mode & S_IFMT) { case S_IFDIR: case S_IFREG: case S_IFLNK: case S_IFCHR: case S_IFBLK: case S_IFIFO: case S_IFSOCK: break; default: CERROR("%s: Unsupported mode %o\n", mdt_obd_name(info->mti_mdt), info->mti_attr.ma_attr.la_mode); RETURN(err_serious(-EOPNOTSUPP)); } rc = mdt_create(info); if (rc == 0) { if ((info->mti_attr.ma_attr.la_mode & S_IFMT) == S_IFDIR) mdt_counter_incr(req, LPROC_MDT_MKDIR, ktime_us_delta(ktime_get(), kstart)); else /* Special file should stay on the same node as parent*/ mdt_counter_incr(req, LPROC_MDT_MKNOD, ktime_us_delta(ktime_get(), kstart)); } 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 ldlm_enqueue_info *einfo = &info->mti_einfo[0]; __u64 lock_ibits; bool cos_incompat = false; int no_name = 0; ktime_t kstart = ktime_get(); int rc; ENTRY; DEBUG_REQ(D_INODE, req, "unlink "DFID"/"DNAME"", PFID(rr->rr_fid1), PNAME(&rr->rr_name)); if (info->mti_dlm_req) ldlm_request_cancel(req, info->mti_dlm_req, 0, LATF_SKIP); if (OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_UNLINK)) RETURN(err_serious(-ENOENT)); if (!fid_is_md_operative(rr->rr_fid1)) RETURN(-EPERM); mp = mdt_object_find(info->mti_env, info->mti_mdt, rr->rr_fid1); if (IS_ERR(mp)) RETURN(PTR_ERR(mp)); if (mdt_object_remote(mp)) { cos_incompat = true; } else { rc = mdt_version_get_check_save(info, mp, 0); if (rc) GOTO(put_parent, rc); } relock: parent_lh = &info->mti_lh[MDT_LH_PARENT]; mdt_lock_pdo_init(parent_lh, LCK_PW, &rr->rr_name); rc = mdt_reint_object_lock(info, mp, parent_lh, MDS_INODELOCK_UPDATE, cos_incompat); if (rc != 0) GOTO(put_parent, rc); /* lookup child object along with version checking */ fid_zero(child_fid); rc = mdt_lookup_version_check(info, mp, &rr->rr_name, child_fid, 1); if (rc != 0) { /* Name might not be able to find during resend of * remote unlink, considering following case. * dir_A is a remote directory, the name entry of * dir_A is on MDT0, the directory is on MDT1, * * 1. client sends unlink req to MDT1. * 2. MDT1 sends name delete update to MDT0. * 3. name entry is being deleted in MDT0 synchronously. * 4. MDT1 is restarted. * 5. client resends unlink req to MDT1. So it can not * find the name entry on MDT0 anymore. * In this case, MDT1 only needs to destory the local * directory. */ if (mdt_object_remote(mp) && rc == -ENOENT && !fid_is_zero(rr->rr_fid2) && lustre_msg_get_flags(req->rq_reqmsg) & MSG_RESENT) { no_name = 1; *child_fid = *rr->rr_fid2; } else { GOTO(unlock_parent, rc); } } if (!fid_is_md_operative(child_fid)) GOTO(unlock_parent, rc = -EPERM); /* 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(unlock_parent, rc = PTR_ERR(mc)); if (!cos_incompat) { rc = mdt_object_striped(info, mc); if (rc < 0) GOTO(put_child, rc); cos_incompat = rc; if (cos_incompat) { mdt_object_put(info->mti_env, mc); mdt_object_unlock(info, mp, parent_lh, -EAGAIN); goto relock; } } child_lh = &info->mti_lh[MDT_LH_CHILD]; mdt_lock_reg_init(child_lh, LCK_EX); if (info->mti_spec.sp_rm_entry) { struct lu_ucred *uc = mdt_ucred(info); if (!mdt_is_dne_client(req->rq_export)) /* Return -ENOTSUPP for old client */ GOTO(put_child, rc = -ENOTSUPP); if (!md_capable(uc, CFS_CAP_SYS_ADMIN)) GOTO(put_child, rc = -EPERM); ma->ma_need = MA_INODE; ma->ma_valid = 0; rc = mdo_unlink(info->mti_env, mdt_object_child(mp), NULL, &rr->rr_name, ma, no_name); GOTO(put_child, rc); } if (mdt_object_remote(mc)) { struct mdt_body *repbody; if (!fid_is_zero(rr->rr_fid2)) { CDEBUG(D_INFO, "%s: name "DNAME" cannot find "DFID"\n", mdt_obd_name(info->mti_mdt), PNAME(&rr->rr_name), PFID(mdt_object_fid(mc))); GOTO(put_child, rc = -ENOENT); } CDEBUG(D_INFO, "%s: name "DNAME": "DFID" is on another MDT\n", mdt_obd_name(info->mti_mdt), PNAME(&rr->rr_name), PFID(mdt_object_fid(mc))); if (!mdt_is_dne_client(req->rq_export)) /* Return -ENOTSUPP for old client */ GOTO(put_child, rc = -ENOTSUPP); /* Revoke the LOOKUP lock of the remote object granted by * this MDT. Since the unlink will happen on another MDT, * it will release the LOOKUP lock right away. Then What * would happen if another client try to grab the LOOKUP * lock at the same time with unlink XXX */ mdt_object_lock(info, mc, child_lh, MDS_INODELOCK_LOOKUP); repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY); LASSERT(repbody != NULL); repbody->mbo_fid1 = *mdt_object_fid(mc); repbody->mbo_valid |= (OBD_MD_FLID | OBD_MD_MDS); GOTO(unlock_child, rc = -EREMOTE); } /* We used to acquire MDS_INODELOCK_FULL here but we can't do * this now because a running HSM restore on the child (unlink * victim) will hold the layout lock. See LU-4002. */ lock_ibits = MDS_INODELOCK_LOOKUP | MDS_INODELOCK_UPDATE; if (mdt_object_remote(mp)) { /* Enqueue lookup lock from parent MDT */ rc = mdt_remote_object_lock(info, mp, mdt_object_fid(mc), &child_lh->mlh_rreg_lh, child_lh->mlh_rreg_mode, MDS_INODELOCK_LOOKUP, false); if (rc != ELDLM_OK) GOTO(put_child, rc); lock_ibits &= ~MDS_INODELOCK_LOOKUP; } rc = mdt_reint_striped_lock(info, mc, child_lh, lock_ibits, einfo, cos_incompat); if (rc != 0) GOTO(put_child, rc); /* * 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_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); mutex_lock(&mc->mot_lov_mutex); rc = mdo_unlink(info->mti_env, mdt_object_child(mp), mdt_object_child(mc), &rr->rr_name, ma, no_name); mutex_unlock(&mc->mot_lov_mutex); if (rc != 0) GOTO(unlock_child, rc); if (!lu_object_is_dying(&mc->mot_header)) { rc = mdt_attr_get_complex(info, mc, ma); if (rc) GOTO(out_stat, rc); } else if (mdt_dom_check_for_discard(info, mc)) { mdt_dom_discard_data(info, mc); } mdt_handle_last_unlink(info, mc, ma); out_stat: if (ma->ma_valid & MA_INODE) { switch (ma->ma_attr.la_mode & S_IFMT) { case S_IFDIR: mdt_counter_incr(req, LPROC_MDT_RMDIR, ktime_us_delta(ktime_get(), kstart)); 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, ktime_us_delta(ktime_get(), kstart)); break; default: LASSERTF(0, "bad file type %o unlinking\n", ma->ma_attr.la_mode); } } EXIT; unlock_child: mdt_reint_striped_unlock(info, mc, child_lh, einfo, rc); put_child: mdt_object_put(info->mti_env, mc); unlock_parent: mdt_object_unlock(info, mp, parent_lh, rc); put_parent: mdt_object_put(info->mti_env, mp); CFS_RACE_WAKEUP(OBD_FAIL_OBD_ZERO_NLINK_RACE); 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; ktime_t kstart = ktime_get(); bool cos_incompat; int rc; ENTRY; DEBUG_REQ(D_INODE, req, "link "DFID" to "DFID"/"DNAME, PFID(rr->rr_fid1), PFID(rr->rr_fid2), PNAME(&rr->rr_name)); if (OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_LINK)) RETURN(err_serious(-ENOENT)); if (OBD_FAIL_PRECHECK(OBD_FAIL_PTLRPC_RESEND_RACE)) { req->rq_no_reply = 1; RETURN(err_serious(-ENOENT)); } if (info->mti_dlm_req) ldlm_request_cancel(req, info->mti_dlm_req, 0, LATF_SKIP); /* Invalid case so return error immediately instead of * processing it */ if (lu_fid_eq(rr->rr_fid1, rr->rr_fid2)) RETURN(-EPERM); if (!fid_is_md_operative(rr->rr_fid1) || !fid_is_md_operative(rr->rr_fid2)) RETURN(-EPERM); /* step 1: find target parent dir */ mp = mdt_object_find(info->mti_env, info->mti_mdt, rr->rr_fid2); if (IS_ERR(mp)) RETURN(PTR_ERR(mp)); rc = mdt_version_get_check_save(info, mp, 0); if (rc) GOTO(put_parent, rc); /* step 2: find source */ ms = mdt_object_find(info->mti_env, info->mti_mdt, rr->rr_fid1); if (IS_ERR(ms)) GOTO(put_parent, rc = PTR_ERR(ms)); if (!mdt_object_exists(ms)) { CDEBUG(D_INFO, "%s: "DFID" does not exist.\n", mdt_obd_name(info->mti_mdt), PFID(rr->rr_fid1)); GOTO(put_source, rc = -ENOENT); } cos_incompat = (mdt_object_remote(mp) || mdt_object_remote(ms)); lhp = &info->mti_lh[MDT_LH_PARENT]; mdt_lock_pdo_init(lhp, LCK_PW, &rr->rr_name); rc = mdt_reint_object_lock(info, mp, lhp, MDS_INODELOCK_UPDATE, cos_incompat); if (rc != 0) GOTO(put_source, rc); OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_RENAME3, 5); lhs = &info->mti_lh[MDT_LH_CHILD]; mdt_lock_reg_init(lhs, LCK_EX); rc = mdt_reint_object_lock(info, ms, lhs, MDS_INODELOCK_UPDATE | MDS_INODELOCK_XATTR, cos_incompat); if (rc != 0) GOTO(unlock_parent, rc); /* step 3: link it */ mdt_fail_write(info->mti_env, info->mti_mdt->mdt_bottom, OBD_FAIL_MDS_REINT_LINK_WRITE); tgt_vbr_obj_set(info->mti_env, mdt_obj2dt(ms)); rc = mdt_version_get_check_save(info, ms, 1); if (rc) GOTO(unlock_source, rc); /** check target version by name during replay */ rc = mdt_lookup_version_check(info, mp, &rr->rr_name, &info->mti_tmp_fid1, 2); if (rc != 0 && rc != -ENOENT) GOTO(unlock_source, rc); /* save version of file name for replay, it must be ENOENT here */ if (!req_is_replay(mdt_info_req(info))) { if (rc != -ENOENT) { CDEBUG(D_INFO, "link target "DNAME" existed!\n", PNAME(&rr->rr_name)); GOTO(unlock_source, rc = -EEXIST); } 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), &rr->rr_name, ma); if (rc == 0) mdt_counter_incr(req, LPROC_MDT_LINK, ktime_us_delta(ktime_get(), kstart)); EXIT; unlock_source: mdt_object_unlock(info, ms, lhs, rc); unlock_parent: mdt_object_unlock(info, mp, lhp, rc); put_source: mdt_object_put(info->mti_env, ms); put_parent: mdt_object_put(info->mti_env, mp); 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, bool cos_incompat) { struct ldlm_res_id *res = &info->mti_res_id; struct ldlm_namespace *ns = info->mti_mdt->mdt_namespace; union ldlm_policy_data *policy = &info->mti_policy; __u64 dlmflags = LDLM_FL_LOCAL_ONLY | LDLM_FL_ATOMIC_CB; 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); memset(policy, 0, sizeof(*policy)); policy->l_inodebits.bits = ibits; if (cos_incompat && (lh->mlh_reg_mode == LCK_PW || lh->mlh_reg_mode == LCK_EX)) dlmflags |= LDLM_FL_COS_INCOMPAT; /* * 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(info->mti_env, ns, &lh->mlh_reg_lh, lh->mlh_reg_mode, policy, res, dlmflags, &info->mti_exp->exp_handle.h_cookie); return rc; } /** * Get BFL lock for rename or migrate process. **/ static int mdt_rename_lock(struct mdt_thread_info *info, struct lustre_handle *lh) { int rc; ENTRY; if (mdt_seq_site(info->mti_mdt)->ss_node_id != 0) { struct lu_fid *fid = &info->mti_tmp_fid1; struct mdt_object *obj; /* XXX, right now, it has to use object API to * enqueue lock cross MDT, so it will enqueue * rename lock(with LUSTRE_BFL_FID) by root object */ lu_root_fid(fid); obj = mdt_object_find(info->mti_env, info->mti_mdt, fid); if (IS_ERR(obj)) RETURN(PTR_ERR(obj)); rc = mdt_remote_object_lock(info, obj, &LUSTRE_BFL_FID, lh, LCK_EX, MDS_INODELOCK_UPDATE, false); mdt_object_put(info->mti_env, obj); } else { struct ldlm_namespace *ns = info->mti_mdt->mdt_namespace; union ldlm_policy_data *policy = &info->mti_policy; struct ldlm_res_id *res_id = &info->mti_res_id; __u64 flags = 0; fid_build_reg_res_name(&LUSTRE_BFL_FID, res_id); memset(policy, 0, sizeof(*policy)); policy->l_inodebits.bits = MDS_INODELOCK_UPDATE; flags = LDLM_FL_LOCAL_ONLY | LDLM_FL_ATOMIC_CB; rc = ldlm_cli_enqueue_local(info->mti_env, 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); RETURN(rc); } RETURN(rc); } static void mdt_rename_unlock(struct lustre_handle *lh) { ENTRY; LASSERT(lustre_handle_is_used(lh)); /* Cancel the single rename lock right away */ ldlm_lock_decref_and_cancel(lh, LCK_EX); EXIT; } static struct mdt_object *mdt_parent_find_check(struct mdt_thread_info *info, const struct lu_fid *fid, int idx) { struct mdt_object *dir; int rc; ENTRY; dir = mdt_object_find(info->mti_env, info->mti_mdt, fid); if (IS_ERR(dir)) RETURN(dir); /* check early, the real version will be saved after locking */ rc = mdt_version_get_check(info, dir, idx); if (rc) GOTO(out_put, rc); if (!mdt_object_exists(dir)) GOTO(out_put, rc = -ENOENT); if (!S_ISDIR(lu_object_attr(&dir->mot_obj))) GOTO(out_put, rc = -ENOTDIR); RETURN(dir); out_put: mdt_object_put(info->mti_env, dir); return ERR_PTR(rc); } /* * in case obj is remote obj on its parent, revoke LOOKUP lock, * herein we don't really check it, just do revoke. */ int mdt_revoke_remote_lookup_lock(struct mdt_thread_info *info, struct mdt_object *pobj, struct mdt_object *obj) { struct mdt_lock_handle *lh = &info->mti_lh[MDT_LH_LOCAL]; int rc; mdt_lock_handle_init(lh); mdt_lock_reg_init(lh, LCK_EX); if (mdt_object_remote(pobj)) { /* don't bother to check if pobj and obj are on the same MDT. */ rc = mdt_remote_object_lock(info, pobj, mdt_object_fid(obj), &lh->mlh_rreg_lh, LCK_EX, MDS_INODELOCK_LOOKUP, false); } else if (mdt_object_remote(obj)) { struct ldlm_res_id *res = &info->mti_res_id; union ldlm_policy_data *policy = &info->mti_policy; __u64 dlmflags = LDLM_FL_LOCAL_ONLY | LDLM_FL_ATOMIC_CB | LDLM_FL_COS_INCOMPAT; fid_build_reg_res_name(mdt_object_fid(obj), res); memset(policy, 0, sizeof(*policy)); policy->l_inodebits.bits = MDS_INODELOCK_LOOKUP; rc = mdt_fid_lock(info->mti_env, info->mti_mdt->mdt_namespace, &lh->mlh_reg_lh, LCK_EX, policy, res, dlmflags, NULL); } else { /* do nothing if both are local */ return 0; } if (rc != ELDLM_OK) return rc; /* * TODO, currently we don't save this lock because there is no place to * hold this lock handle, but to avoid race we need to save this lock. */ mdt_object_unlock(info, NULL, lh, 1); return 0; } /* * operation may takes locks of linkea, or directory stripes, group them in * different list. */ struct mdt_sub_lock { struct mdt_object *msl_obj; struct mdt_lock_handle msl_lh; struct list_head msl_linkage; }; static void mdt_unlock_list(struct mdt_thread_info *info, struct list_head *list, int decref) { struct mdt_sub_lock *msl; struct mdt_sub_lock *tmp; list_for_each_entry_safe(msl, tmp, list, msl_linkage) { mdt_object_unlock_put(info, msl->msl_obj, &msl->msl_lh, decref); list_del(&msl->msl_linkage); OBD_FREE_PTR(msl); } } static inline void mdt_migrate_object_unlock(struct mdt_thread_info *info, struct mdt_object *obj, struct mdt_lock_handle *lh, struct ldlm_enqueue_info *einfo, struct list_head *slave_locks, int decref) { if (mdt_object_remote(obj)) { mdt_unlock_list(info, slave_locks, decref); mdt_object_unlock(info, obj, lh, decref); } else { mdt_reint_striped_unlock(info, obj, lh, einfo, decref); } } /* * lock parents of links, and also check whether total locks don't exceed * RS_MAX_LOCKS. * * \retval 0 on success, and locks can be saved in ptlrpc_reply_stat * \retval 1 on success, but total lock count may exceed RS_MAX_LOCKS * \retval -ev negative errno upon error */ static int mdt_link_parents_lock(struct mdt_thread_info *info, struct mdt_object *pobj, const struct md_attr *ma, struct mdt_object *obj, struct mdt_lock_handle *lhp, struct ldlm_enqueue_info *peinfo, struct list_head *parent_slave_locks, struct list_head *link_locks) { struct mdt_device *mdt = info->mti_mdt; struct lu_buf *buf = &info->mti_big_buf; struct lu_name *lname = &info->mti_name; struct linkea_data ldata = { NULL }; bool blocked = false; int local_lnkp_cnt = 0; int rc; ENTRY; if (S_ISDIR(lu_object_attr(&obj->mot_obj))) RETURN(0); buf = lu_buf_check_and_alloc(buf, MAX_LINKEA_SIZE); if (buf->lb_buf == NULL) RETURN(-ENOMEM); ldata.ld_buf = buf; rc = mdt_links_read(info, obj, &ldata); if (rc) { if (rc == -ENOENT || rc == -ENODATA) rc = 0; RETURN(rc); } for (linkea_first_entry(&ldata); ldata.ld_lee && !rc; linkea_next_entry(&ldata)) { struct mdt_object *lnkp; struct mdt_sub_lock *msl; struct lu_fid fid; __u64 ibits; linkea_entry_unpack(ldata.ld_lee, &ldata.ld_reclen, lname, &fid); /* check if it's also linked to parent */ if (lu_fid_eq(mdt_object_fid(pobj), &fid)) { CDEBUG(D_INFO, "skip parent "DFID", reovke "DNAME"\n", PFID(&fid), PNAME(lname)); /* in case link is remote object, revoke LOOKUP lock */ rc = mdt_revoke_remote_lookup_lock(info, pobj, obj); continue; } lnkp = NULL; /* check if it's linked to a stripe of parent */ if (ma->ma_valid & MA_LMV) { struct lmv_mds_md_v1 *lmv = &ma->ma_lmv->lmv_md_v1; struct lu_fid *stripe_fid = &info->mti_tmp_fid1; int j = 0; for (; j < le32_to_cpu(lmv->lmv_stripe_count); j++) { fid_le_to_cpu(stripe_fid, &lmv->lmv_stripe_fids[j]); if (lu_fid_eq(stripe_fid, &fid)) { CDEBUG(D_INFO, "skip stripe "DFID ", reovke "DNAME"\n", PFID(&fid), PNAME(lname)); lnkp = mdt_object_find(info->mti_env, mdt, &fid); if (IS_ERR(lnkp)) GOTO(out, rc = PTR_ERR(lnkp)); break; } } if (lnkp) { rc = mdt_revoke_remote_lookup_lock(info, lnkp, obj); mdt_object_put(info->mti_env, lnkp); continue; } } /* Check if it's already locked */ list_for_each_entry(msl, link_locks, msl_linkage) { if (lu_fid_eq(mdt_object_fid(msl->msl_obj), &fid)) { CDEBUG(D_INFO, DFID" was locked, revoke "DNAME"\n", PFID(&fid), PNAME(lname)); lnkp = msl->msl_obj; break; } } if (lnkp) { rc = mdt_revoke_remote_lookup_lock(info, lnkp, obj); continue; } CDEBUG(D_INFO, "lock "DFID":"DNAME"\n", PFID(&fid), PNAME(lname)); lnkp = mdt_object_find(info->mti_env, mdt, &fid); if (IS_ERR(lnkp)) { CWARN("%s: cannot find obj "DFID": %ld\n", mdt_obd_name(mdt), PFID(&fid), PTR_ERR(lnkp)); continue; } if (!mdt_object_exists(lnkp)) { CDEBUG(D_INFO, DFID" doesn't exist, skip "DNAME"\n", PFID(&fid), PNAME(lname)); mdt_object_put(info->mti_env, lnkp); continue; } if (!mdt_object_remote(lnkp)) local_lnkp_cnt++; OBD_ALLOC_PTR(msl); if (msl == NULL) GOTO(out, rc = -ENOMEM); /* * we can't follow parent-child lock order like other MD * operations, use lock_try here to avoid deadlock, if the lock * cannot be taken, drop all locks taken, revoke the blocked * one, and continue processing the remaining entries, and in * the end of the loop restart from beginning. */ mdt_lock_pdo_init(&msl->msl_lh, LCK_PW, lname); ibits = 0; rc = mdt_object_lock_try(info, lnkp, &msl->msl_lh, &ibits, MDS_INODELOCK_UPDATE, true); if (!(ibits & MDS_INODELOCK_UPDATE)) { CDEBUG(D_INFO, "busy lock on "DFID" "DNAME"\n", PFID(&fid), PNAME(lname)); mdt_unlock_list(info, link_locks, 1); /* also unlock parent locks to avoid deadlock */ if (!blocked) mdt_migrate_object_unlock(info, pobj, lhp, peinfo, parent_slave_locks, 1); blocked = true; mdt_lock_pdo_init(&msl->msl_lh, LCK_PW, lname); rc = mdt_object_lock(info, lnkp, &msl->msl_lh, MDS_INODELOCK_UPDATE); if (rc) { mdt_object_put(info->mti_env, lnkp); OBD_FREE_PTR(msl); GOTO(out, rc); } if (mdt_object_remote(lnkp)) { struct ldlm_lock *lock; /* * for remote object, set lock cb_atomic, * so lock can be released in blocking_ast() * immediately, then the next lock_try will * have better chance of success. */ lock = ldlm_handle2lock( &msl->msl_lh.mlh_rreg_lh); LASSERT(lock != NULL); lock_res_and_lock(lock); ldlm_set_atomic_cb(lock); unlock_res_and_lock(lock); LDLM_LOCK_PUT(lock); } mdt_object_unlock_put(info, lnkp, &msl->msl_lh, 1); OBD_FREE_PTR(msl); continue; } INIT_LIST_HEAD(&msl->msl_linkage); msl->msl_obj = lnkp; list_add_tail(&msl->msl_linkage, link_locks); rc = mdt_revoke_remote_lookup_lock(info, lnkp, obj); } if (blocked) GOTO(out, rc = -EBUSY); EXIT; out: if (rc) mdt_unlock_list(info, link_locks, rc); else if (local_lnkp_cnt > RS_MAX_LOCKS - 6) /* * parent may have 3 local objects: master object and 2 stripes * (if it's being migrated too); source may have 2 local * objects: master and 1 stripe; target has 1 local object. */ rc = 1; return rc; } static int mdt_lock_remote_slaves(struct mdt_thread_info *info, struct mdt_object *obj, const struct md_attr *ma, struct list_head *slave_locks) { struct mdt_device *mdt = info->mti_mdt; const struct lmv_mds_md_v1 *lmv = &ma->ma_lmv->lmv_md_v1; struct lu_fid *fid = &info->mti_tmp_fid1; struct mdt_object *slave; struct mdt_sub_lock *msl; int i; int rc; ENTRY; LASSERT(mdt_object_remote(obj)); LASSERT(ma->ma_valid & MA_LMV); LASSERT(lmv); if (!lmv_is_sane(lmv)) RETURN(-EINVAL); for (i = 0; i < le32_to_cpu(lmv->lmv_stripe_count); i++) { fid_le_to_cpu(fid, &lmv->lmv_stripe_fids[i]); if (!fid_is_sane(fid)) continue; slave = mdt_object_find(info->mti_env, mdt, fid); if (IS_ERR(slave)) GOTO(out, rc = PTR_ERR(slave)); OBD_ALLOC_PTR(msl); if (!msl) { mdt_object_put(info->mti_env, slave); GOTO(out, rc = -ENOMEM); } mdt_lock_reg_init(&msl->msl_lh, LCK_EX); rc = mdt_reint_object_lock(info, slave, &msl->msl_lh, MDS_INODELOCK_UPDATE, true); if (rc) { OBD_FREE_PTR(msl); mdt_object_put(info->mti_env, slave); GOTO(out, rc); } INIT_LIST_HEAD(&msl->msl_linkage); msl->msl_obj = slave; list_add_tail(&msl->msl_linkage, slave_locks); } EXIT; out: if (rc) mdt_unlock_list(info, slave_locks, rc); return rc; } /* lock parent and its stripes */ static int mdt_migrate_parent_lock(struct mdt_thread_info *info, struct mdt_object *obj, const struct md_attr *ma, struct mdt_lock_handle *lh, struct ldlm_enqueue_info *einfo, struct list_head *slave_locks) { int rc; if (mdt_object_remote(obj)) { rc = mdt_remote_object_lock(info, obj, mdt_object_fid(obj), &lh->mlh_rreg_lh, LCK_PW, MDS_INODELOCK_UPDATE, false); if (rc != ELDLM_OK) return rc; /* * if obj is remote and striped, lock its stripes explicitly * because it's not striped in LOD layer on this MDT. */ if (ma->ma_valid & MA_LMV) { rc = mdt_lock_remote_slaves(info, obj, ma, slave_locks); if (rc) mdt_object_unlock(info, obj, lh, rc); } } else { rc = mdt_reint_striped_lock(info, obj, lh, MDS_INODELOCK_UPDATE, einfo, true); } return rc; } /* * in migration, object may be remote, and we need take full lock of it and its * stripes if it's directory, besides, object may be a remote object on its * parent, revoke its LOOKUP lock on where its parent is located. */ static int mdt_migrate_object_lock(struct mdt_thread_info *info, struct mdt_object *pobj, struct mdt_object *obj, struct mdt_lock_handle *lh, struct ldlm_enqueue_info *einfo, struct list_head *slave_locks) { int rc; if (mdt_object_remote(obj)) { rc = mdt_revoke_remote_lookup_lock(info, pobj, obj); if (rc) return rc; rc = mdt_remote_object_lock(info, obj, mdt_object_fid(obj), &lh->mlh_rreg_lh, LCK_EX, MDS_INODELOCK_FULL, false); if (rc != ELDLM_OK) return rc; /* * if obj is remote and striped, lock its stripes explicitly * because it's not striped in LOD layer on this MDT. */ if (S_ISDIR(lu_object_attr(&obj->mot_obj))) { struct md_attr *ma = &info->mti_attr; rc = mdt_stripe_get(info, obj, ma, XATTR_NAME_LMV); if (rc) { mdt_object_unlock(info, obj, lh, rc); return rc; } if (ma->ma_valid & MA_LMV) { rc = mdt_lock_remote_slaves(info, obj, ma, slave_locks); if (rc) mdt_object_unlock(info, obj, lh, rc); } } } else { if (mdt_object_remote(pobj)) { rc = mdt_revoke_remote_lookup_lock(info, pobj, obj); if (rc) return rc; } rc = mdt_reint_striped_lock(info, obj, lh, MDS_INODELOCK_FULL, einfo, true); } return rc; } /* * lookup source by name, if parent is striped directory, we need to find the * corresponding stripe where source is located, and then lookup there. * * besides, if parent is migrating too, and file is already in target stripe, * this should be a redo of 'lfs migrate' on client side. */ static int mdt_migrate_lookup(struct mdt_thread_info *info, struct mdt_object *pobj, const struct md_attr *ma, const struct lu_name *lname, struct mdt_object **spobj, struct mdt_object **sobj) { const struct lu_env *env = info->mti_env; struct lu_fid *fid = &info->mti_tmp_fid1; struct mdt_object *stripe; int rc; if (ma->ma_valid & MA_LMV) { /* if parent is striped, lookup on corresponding stripe */ struct lmv_mds_md_v1 *lmv = &ma->ma_lmv->lmv_md_v1; if (!lmv_is_sane(lmv)) return -EBADF; rc = lmv_name_to_stripe_index_old(lmv, lname->ln_name, lname->ln_namelen); if (rc < 0) return rc; fid_le_to_cpu(fid, &lmv->lmv_stripe_fids[rc]); stripe = mdt_object_find(env, info->mti_mdt, fid); if (IS_ERR(stripe)) return PTR_ERR(stripe); fid_zero(fid); rc = mdo_lookup(env, mdt_object_child(stripe), lname, fid, &info->mti_spec); if (rc == -ENOENT && lmv_is_layout_changing(lmv)) { /* * if parent layout is changeing, and lookup child * failed on source stripe, lookup again on target * stripe, if it exists, it means previous migration * was interrupted, and current file was migrated * already. */ mdt_object_put(env, stripe); rc = lmv_name_to_stripe_index(lmv, lname->ln_name, lname->ln_namelen); if (rc < 0) return rc; fid_le_to_cpu(fid, &lmv->lmv_stripe_fids[rc]); stripe = mdt_object_find(env, info->mti_mdt, fid); if (IS_ERR(stripe)) return PTR_ERR(stripe); fid_zero(fid); rc = mdo_lookup(env, mdt_object_child(stripe), lname, fid, &info->mti_spec); mdt_object_put(env, stripe); return rc ?: -EALREADY; } else if (rc) { mdt_object_put(env, stripe); return rc; } } else { fid_zero(fid); rc = mdo_lookup(env, mdt_object_child(pobj), lname, fid, &info->mti_spec); if (rc) return rc; stripe = pobj; mdt_object_get(env, stripe); } *spobj = stripe; *sobj = mdt_object_find(env, info->mti_mdt, fid); if (IS_ERR(*sobj)) { mdt_object_put(env, stripe); rc = PTR_ERR(*sobj); *spobj = NULL; *sobj = NULL; } return rc; } /* end lease and close file for regular file */ static int mdd_migrate_close(struct mdt_thread_info *info, struct mdt_object *obj) { struct close_data *data; struct mdt_body *repbody; struct ldlm_lock *lease; int rc; int rc2; rc = -EPROTO; if (!req_capsule_field_present(info->mti_pill, &RMF_MDT_EPOCH, RCL_CLIENT) || !req_capsule_field_present(info->mti_pill, &RMF_CLOSE_DATA, RCL_CLIENT)) goto close; data = req_capsule_client_get(info->mti_pill, &RMF_CLOSE_DATA); if (!data) goto close; rc = -ESTALE; lease = ldlm_handle2lock(&data->cd_handle); if (!lease) goto close; /* check if the lease was already canceled */ lock_res_and_lock(lease); rc = ldlm_is_cancel(lease); unlock_res_and_lock(lease); if (rc) { rc = -EAGAIN; LDLM_DEBUG(lease, DFID" lease broken", PFID(mdt_object_fid(obj))); } /* * cancel server side lease, client side counterpart should have been * cancelled, it's okay to cancel it now as we've held mot_open_sem. */ ldlm_lock_cancel(lease); ldlm_reprocess_all(lease->l_resource, lease); LDLM_LOCK_PUT(lease); close: rc2 = mdt_close_internal(info, mdt_info_req(info), NULL); repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY); repbody->mbo_valid |= OBD_MD_CLOSE_INTENT_EXECED; return rc ?: rc2; } /* * migrate file in below steps: * 1. lock parent and its stripes * 2. lookup source by name * 3. lock parents of source links if source is not directory * 4. reject if source is in HSM * 5. take source open_sem and close file if source is regular file * 6. lock source and its stripes if it's directory * 7. lock target so subsequent change to it can trigger COS * 8. migrate file * 9. unlock above locks * 10. sync device if source has links */ int mdt_reint_migrate(struct mdt_thread_info *info, struct mdt_lock_handle *unused) { const struct lu_env *env = info->mti_env; struct mdt_device *mdt = info->mti_mdt; struct ptlrpc_request *req = mdt_info_req(info); struct mdt_reint_record *rr = &info->mti_rr; struct lu_ucred *uc = mdt_ucred(info); struct md_attr *ma = &info->mti_attr; struct ldlm_enqueue_info *peinfo = &info->mti_einfo[0]; struct ldlm_enqueue_info *seinfo = &info->mti_einfo[1]; struct mdt_object *pobj; struct mdt_object *spobj = NULL; struct mdt_object *sobj = NULL; struct mdt_object *tobj; struct lustre_handle rename_lh = { 0 }; struct mdt_lock_handle *lhp; struct mdt_lock_handle *lhs; struct mdt_lock_handle *lht; LIST_HEAD(parent_slave_locks); LIST_HEAD(child_slave_locks); LIST_HEAD(link_locks); int lock_retries = 5; bool open_sem_locked = false; bool do_sync = false; int rc; ENTRY; CDEBUG(D_INODE, "migrate "DFID"/"DNAME" to "DFID"\n", PFID(rr->rr_fid1), PNAME(&rr->rr_name), PFID(rr->rr_fid2)); if (info->mti_dlm_req) ldlm_request_cancel(req, info->mti_dlm_req, 0, LATF_SKIP); if (!fid_is_md_operative(rr->rr_fid1) || !fid_is_md_operative(rr->rr_fid2)) RETURN(-EPERM); /* don't allow migrate . or .. */ if (lu_name_is_dot_or_dotdot(&rr->rr_name)) RETURN(-EBUSY); if (!mdt->mdt_enable_remote_dir || !mdt->mdt_enable_dir_migration) RETURN(-EPERM); if (uc && !md_capable(uc, CFS_CAP_SYS_ADMIN) && uc->uc_gid != mdt->mdt_enable_remote_dir_gid && mdt->mdt_enable_remote_dir_gid != -1) RETURN(-EPERM); /* * Note: do not enqueue rename lock for replay request, because * if other MDT holds rename lock, but being blocked to wait for * this MDT to finish its recovery, and the failover MDT can not * get rename lock, which will cause deadlock. * * req is NULL if this is called by directory auto-split. */ if (req && !req_is_replay(req)) { rc = mdt_rename_lock(info, &rename_lh); if (rc != 0) { CERROR("%s: can't lock FS for rename: rc = %d\n", mdt_obd_name(info->mti_mdt), rc); RETURN(rc); } } /* pobj is master object of parent */ pobj = mdt_object_find(env, mdt, rr->rr_fid1); if (IS_ERR(pobj)) GOTO(unlock_rename, rc = PTR_ERR(pobj)); if (req) { rc = mdt_version_get_check(info, pobj, 0); if (rc) GOTO(put_parent, rc); } if (!mdt_object_exists(pobj)) GOTO(put_parent, rc = -ENOENT); if (!S_ISDIR(lu_object_attr(&pobj->mot_obj))) GOTO(put_parent, rc = -ENOTDIR); rc = mdt_stripe_get(info, pobj, ma, XATTR_NAME_LMV); if (rc) GOTO(put_parent, rc); lock_parent: /* lock parent object */ lhp = &info->mti_lh[MDT_LH_PARENT]; mdt_lock_reg_init(lhp, LCK_PW); rc = mdt_migrate_parent_lock(info, pobj, ma, lhp, peinfo, &parent_slave_locks); if (rc) GOTO(put_parent, rc); /* * spobj is the corresponding stripe against name if pobj is striped * directory, which is the real parent, and no need to lock, because * we've taken full lock of pobj. */ rc = mdt_migrate_lookup(info, pobj, ma, &rr->rr_name, &spobj, &sobj); if (rc) GOTO(unlock_parent, rc); /* lock parents of source links, and revoke LOOKUP lock of links */ rc = mdt_link_parents_lock(info, pobj, ma, sobj, lhp, peinfo, &parent_slave_locks, &link_locks); if (rc == -EBUSY && lock_retries-- > 0) { mdt_object_put(env, sobj); mdt_object_put(env, spobj); goto lock_parent; } if (rc < 0) GOTO(put_source, rc); /* * RS_MAX_LOCKS is the limit of number of locks that can be saved along * with one request, if total lock count exceeds this limit, we will * drop all locks after migration, and synchronous device in the end. */ do_sync = rc; /* TODO: DoM migration is not supported, migrate dirent only */ if (S_ISREG(lu_object_attr(&sobj->mot_obj))) { rc = mdt_stripe_get(info, sobj, ma, XATTR_NAME_LOV); if (rc) GOTO(unlock_links, rc); if (ma->ma_valid & MA_LOV && mdt_lmm_dom_stripesize(ma->ma_lmm)) info->mti_spec.sp_migrate_nsonly = 1; } /* if migration HSM is allowed */ if (!mdt->mdt_opts.mo_migrate_hsm_allowed) { ma->ma_need = MA_HSM; ma->ma_valid = 0; rc = mdt_attr_get_complex(info, sobj, ma); if (rc) GOTO(unlock_links, rc); if ((ma->ma_valid & MA_HSM) && ma->ma_hsm.mh_flags != 0) GOTO(unlock_links, rc = -EOPNOTSUPP); } /* end lease and close file for regular file */ if (info->mti_spec.sp_migrate_close) { /* try to hold open_sem so that nobody else can open the file */ if (!down_write_trylock(&sobj->mot_open_sem)) { /* close anyway */ mdd_migrate_close(info, sobj); GOTO(unlock_links, rc = -EBUSY); } else { open_sem_locked = true; rc = mdd_migrate_close(info, sobj); if (rc) GOTO(unlock_open_sem, rc); } } /* lock source */ lhs = &info->mti_lh[MDT_LH_OLD]; mdt_lock_reg_init(lhs, LCK_EX); rc = mdt_migrate_object_lock(info, spobj, sobj, lhs, seinfo, &child_slave_locks); if (rc) GOTO(unlock_open_sem, rc); /* lock target */ tobj = mdt_object_find(env, mdt, rr->rr_fid2); if (IS_ERR(tobj)) GOTO(unlock_source, rc = PTR_ERR(tobj)); lht = &info->mti_lh[MDT_LH_NEW]; mdt_lock_reg_init(lht, LCK_EX); rc = mdt_reint_object_lock(info, tobj, lht, MDS_INODELOCK_FULL, true); if (rc) GOTO(put_target, rc); /* Don't do lookup sanity check. We know name doesn't exist. */ info->mti_spec.sp_cr_lookup = 0; info->mti_spec.sp_feat = &dt_directory_features; rc = mdo_migrate(env, mdt_object_child(pobj), mdt_object_child(sobj), &rr->rr_name, mdt_object_child(tobj), &info->mti_spec, ma); if (!rc) lprocfs_counter_incr(mdt->mdt_lu_dev.ld_obd->obd_md_stats, LPROC_MDT_MIGRATE + LPROC_MD_LAST_OPC); EXIT; mdt_object_unlock(info, tobj, lht, rc); put_target: mdt_object_put(env, tobj); unlock_source: mdt_migrate_object_unlock(info, sobj, lhs, seinfo, &child_slave_locks, rc); unlock_open_sem: if (open_sem_locked) up_write(&sobj->mot_open_sem); unlock_links: /* if we've got too many locks to save into RPC, * then just commit before the locks are released */ if (!rc && do_sync) mdt_device_sync(env, mdt); mdt_unlock_list(info, &link_locks, do_sync ? 1 : rc); put_source: mdt_object_put(env, sobj); mdt_object_put(env, spobj); unlock_parent: mdt_migrate_object_unlock(info, pobj, lhp, peinfo, &parent_slave_locks, rc); put_parent: mdt_object_put(env, pobj); unlock_rename: if (lustre_handle_is_used(&rename_lh)) mdt_rename_unlock(&rename_lh); return rc; } static int mdt_object_lock_save(struct mdt_thread_info *info, struct mdt_object *dir, struct mdt_lock_handle *lh, int idx, bool cos_incompat) { int rc; /* we lock the target dir if it is local */ rc = mdt_reint_object_lock(info, dir, lh, MDS_INODELOCK_UPDATE, cos_incompat); if (rc != 0) return rc; /* get and save correct version after locking */ mdt_version_get_save(info, dir, idx); return 0; } /* * determine lock order of sobj and tobj * * there are two situations we need to lock tobj before sobj: * 1. sobj is child of tobj * 2. sobj and tobj are stripes of a directory, and stripe index of sobj is * larger than that of tobj * * \retval 1 lock tobj before sobj * \retval 0 lock sobj before tobj * \retval -ev negative errno upon error */ static int mdt_rename_determine_lock_order(struct mdt_thread_info *info, struct mdt_object *sobj, struct mdt_object *tobj) { struct md_attr *ma = &info->mti_attr; struct lu_fid *spfid = &info->mti_tmp_fid1; struct lu_fid *tpfid = &info->mti_tmp_fid2; struct lmv_mds_md_v1 *lmv; __u32 sindex; __u32 tindex; int rc; /* sobj and tobj are the same */ if (sobj == tobj) return 0; if (fid_is_root(mdt_object_fid(sobj))) return 0; if (fid_is_root(mdt_object_fid(tobj))) return 1; /* check whether sobj is child of tobj */ rc = mdo_is_subdir(info->mti_env, mdt_object_child(sobj), mdt_object_fid(tobj)); if (rc < 0) return rc; if (rc == 1) return 1; /* check whether sobj and tobj are children of the same parent */ rc = mdt_attr_get_pfid(info, sobj, spfid); if (rc) return rc; rc = mdt_attr_get_pfid(info, tobj, tpfid); if (rc) return rc; if (!lu_fid_eq(spfid, tpfid)) return 0; /* check whether sobj and tobj are sibling stripes */ rc = mdt_stripe_get(info, sobj, ma, XATTR_NAME_LMV); if (rc) return rc; if (!(ma->ma_valid & MA_LMV)) return 0; lmv = &ma->ma_lmv->lmv_md_v1; if (!(le32_to_cpu(lmv->lmv_magic) & LMV_MAGIC_STRIPE)) return 0; sindex = le32_to_cpu(lmv->lmv_master_mdt_index); ma->ma_valid = 0; rc = mdt_stripe_get(info, tobj, ma, XATTR_NAME_LMV); if (rc) return rc; if (!(ma->ma_valid & MA_LMV)) return -ENODATA; lmv = &ma->ma_lmv->lmv_md_v1; if (!(le32_to_cpu(lmv->lmv_magic) & LMV_MAGIC_STRIPE)) return -EINVAL; tindex = le32_to_cpu(lmv->lmv_master_mdt_index); /* check stripe index of sobj and tobj */ if (sindex == tindex) return -EINVAL; return sindex < tindex ? 0 : 1; } /* * lock rename source object. * * Both source and source parent may be remote, and source may be a remote * object on source parent, to avoid overriding lock handle, store remote * LOOKUP lock separately in @lhr. * * \retval 0 on success * \retval -ev negative errno upon error */ static int mdt_rename_source_lock(struct mdt_thread_info *info, struct mdt_object *parent, struct mdt_object *child, struct mdt_lock_handle *lhc, struct mdt_lock_handle *lhr, __u64 ibits, bool cos_incompat) { int rc; rc = mdt_is_remote_object(info, parent, child); if (rc < 0) return rc; if (rc) { /* enqueue remote LOOKUP lock from the parent MDT */ __u64 rmt_ibits = MDS_INODELOCK_LOOKUP; if (mdt_object_remote(parent)) { rc = mdt_remote_object_lock(info, parent, mdt_object_fid(child), &lhr->mlh_rreg_lh, lhr->mlh_rreg_mode, rmt_ibits, false); if (rc != ELDLM_OK) return rc; } else { LASSERT(mdt_object_remote(child)); rc = mdt_object_local_lock(info, child, lhr, &rmt_ibits, 0, true); if (rc < 0) return rc; } ibits &= ~MDS_INODELOCK_LOOKUP; } if (mdt_object_remote(child)) { rc = mdt_remote_object_lock(info, child, mdt_object_fid(child), &lhc->mlh_rreg_lh, lhc->mlh_rreg_mode, ibits, false); if (rc == ELDLM_OK) rc = 0; } else { rc = mdt_reint_object_lock(info, child, lhc, ibits, cos_incompat); } if (!rc) mdt_object_unlock(info, child, lhr, rc); return rc; } /* * VBR: rename versions in reply: 0 - srcdir parent; 1 - tgtdir parent; * 2 - srcdir child; 3 - tgtdir child. * Update on disk version of srcdir child. */ static int mdt_reint_rename(struct mdt_thread_info *info, struct mdt_lock_handle *unused) { struct mdt_device *mdt = info->mti_mdt; 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 = NULL; struct mdt_object *mtgtdir = NULL; struct mdt_object *mold; struct mdt_object *mnew = NULL; struct lustre_handle rename_lh = { 0 }; struct mdt_lock_handle *lh_srcdirp; struct mdt_lock_handle *lh_tgtdirp; struct mdt_lock_handle *lh_oldp = NULL; struct mdt_lock_handle *lh_rmt = NULL; struct mdt_lock_handle *lh_newp = NULL; struct lu_fid *old_fid = &info->mti_tmp_fid1; struct lu_fid *new_fid = &info->mti_tmp_fid2; __u64 lock_ibits; bool reverse = false, discard = false; bool cos_incompat; ktime_t kstart = ktime_get(); int rc; ENTRY; DEBUG_REQ(D_INODE, req, "rename "DFID"/"DNAME" to "DFID"/"DNAME, PFID(rr->rr_fid1), PNAME(&rr->rr_name), PFID(rr->rr_fid2), PNAME(&rr->rr_tgt_name)); if (info->mti_dlm_req) ldlm_request_cancel(req, info->mti_dlm_req, 0, LATF_SKIP); if (!fid_is_md_operative(rr->rr_fid1) || !fid_is_md_operative(rr->rr_fid2)) RETURN(-EPERM); /* find both parents. */ msrcdir = mdt_parent_find_check(info, rr->rr_fid1, 0); if (IS_ERR(msrcdir)) RETURN(PTR_ERR(msrcdir)); OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_RENAME3, 5); if (lu_fid_eq(rr->rr_fid1, rr->rr_fid2)) { mtgtdir = msrcdir; mdt_object_get(info->mti_env, mtgtdir); } else { mtgtdir = mdt_parent_find_check(info, rr->rr_fid2, 1); if (IS_ERR(mtgtdir)) GOTO(out_put_srcdir, rc = PTR_ERR(mtgtdir)); } /* * Note: do not enqueue rename lock for replay request, because * if other MDT holds rename lock, but being blocked to wait for * this MDT to finish its recovery, and the failover MDT can not * get rename lock, which will cause deadlock. */ if (!req_is_replay(req)) { /* * Normally rename RPC is handled on the MDT with the target * directory (if target exists, it's on the MDT with the * target), if the source directory is remote, it's a hint that * source is remote too (this may not be true, but it won't * cause any issue), return -EXDEV early to avoid taking * rename_lock. */ if (!mdt->mdt_enable_remote_rename && mdt_object_remote(msrcdir)) GOTO(out_put_tgtdir, rc = -EXDEV); rc = mdt_rename_lock(info, &rename_lh); if (rc != 0) { CERROR("%s: can't lock FS for rename: rc = %d\n", mdt_obd_name(mdt), rc); GOTO(out_put_tgtdir, rc); } } rc = mdt_rename_determine_lock_order(info, msrcdir, mtgtdir); if (rc < 0) GOTO(out_unlock_rename, rc); reverse = rc; /* source needs to be looked up after locking source parent, otherwise * this rename may race with unlink source, and cause rename hang, see * sanityn.sh 55b, so check parents first, if later we found source is * remote, relock parents. */ cos_incompat = (mdt_object_remote(msrcdir) || mdt_object_remote(mtgtdir)); OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_RENAME4, 5); /* lock parents in the proper order. */ lh_srcdirp = &info->mti_lh[MDT_LH_PARENT]; lh_tgtdirp = &info->mti_lh[MDT_LH_CHILD]; relock: mdt_lock_pdo_init(lh_srcdirp, LCK_PW, &rr->rr_name); mdt_lock_pdo_init(lh_tgtdirp, LCK_PW, &rr->rr_tgt_name); if (reverse) { rc = mdt_object_lock_save(info, mtgtdir, lh_tgtdirp, 1, cos_incompat); if (rc) GOTO(out_unlock_rename, rc); OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_RENAME, 5); rc = mdt_object_lock_save(info, msrcdir, lh_srcdirp, 0, cos_incompat); if (rc != 0) { mdt_object_unlock(info, mtgtdir, lh_tgtdirp, rc); GOTO(out_unlock_rename, rc); } } else { rc = mdt_object_lock_save(info, msrcdir, lh_srcdirp, 0, cos_incompat); if (rc) GOTO(out_unlock_rename, rc); OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_RENAME, 5); if (mtgtdir != msrcdir) { rc = mdt_object_lock_save(info, mtgtdir, lh_tgtdirp, 1, cos_incompat); } else if (!mdt_object_remote(mtgtdir) && lh_srcdirp->mlh_pdo_hash != lh_tgtdirp->mlh_pdo_hash) { rc = mdt_pdir_hash_lock(info, lh_tgtdirp, mtgtdir, MDS_INODELOCK_UPDATE, cos_incompat); OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_PDO_LOCK2, 10); } if (rc != 0) { mdt_object_unlock(info, msrcdir, lh_srcdirp, rc); GOTO(out_unlock_rename, rc); } } OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_RENAME4, 5); OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_RENAME2, 5); /* find mold object. */ fid_zero(old_fid); rc = mdt_lookup_version_check(info, msrcdir, &rr->rr_name, old_fid, 2); if (rc != 0) GOTO(out_unlock_parents, rc); if (lu_fid_eq(old_fid, rr->rr_fid1) || lu_fid_eq(old_fid, rr->rr_fid2)) GOTO(out_unlock_parents, rc = -EINVAL); if (!fid_is_md_operative(old_fid)) GOTO(out_unlock_parents, rc = -EPERM); mold = mdt_object_find(info->mti_env, info->mti_mdt, old_fid); if (IS_ERR(mold)) GOTO(out_unlock_parents, rc = PTR_ERR(mold)); if (!mdt_object_exists(mold)) { LU_OBJECT_DEBUG(D_INODE, info->mti_env, &mold->mot_obj, "object does not exist"); GOTO(out_put_old, rc = -ENOENT); } if (mdt_object_remote(mold) && !mdt->mdt_enable_remote_rename) GOTO(out_put_old, rc = -EXDEV); /* Check if @mtgtdir is subdir of @mold, before locking child * to avoid reverse locking. */ if (mtgtdir != msrcdir) { rc = mdo_is_subdir(info->mti_env, mdt_object_child(mtgtdir), old_fid); if (rc) { if (rc == 1) rc = -EINVAL; GOTO(out_put_old, rc); } } tgt_vbr_obj_set(info->mti_env, mdt_obj2dt(mold)); /* save version after locking */ mdt_version_get_save(info, mold, 2); if (!cos_incompat && mdt_object_remote(mold)) { cos_incompat = true; mdt_object_put(info->mti_env, mold); mdt_object_unlock(info, mtgtdir, lh_tgtdirp, -EAGAIN); mdt_object_unlock(info, msrcdir, lh_srcdirp, -EAGAIN); goto relock; } /* find mnew object: * mnew target object may not exist now * lookup with version checking */ fid_zero(new_fid); rc = mdt_lookup_version_check(info, mtgtdir, &rr->rr_tgt_name, 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_put_old, rc); if (lu_fid_eq(new_fid, rr->rr_fid1) || lu_fid_eq(new_fid, rr->rr_fid2)) GOTO(out_put_old, rc = -EINVAL); if (!fid_is_md_operative(new_fid)) GOTO(out_put_old, rc = -EPERM); mnew = mdt_object_find(info->mti_env, info->mti_mdt, new_fid); if (IS_ERR(mnew)) GOTO(out_put_old, rc = PTR_ERR(mnew)); if (!mdt_object_exists(mnew)) { LU_OBJECT_DEBUG(D_INODE, info->mti_env, &mnew->mot_obj, "object does not exist"); GOTO(out_put_new, rc = -ENOENT); } if (mdt_object_remote(mnew)) { struct mdt_body *repbody; /* Always send rename req to the target child MDT */ repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY); LASSERT(repbody != NULL); repbody->mbo_fid1 = *new_fid; repbody->mbo_valid |= (OBD_MD_FLID | OBD_MD_MDS); GOTO(out_put_new, rc = -EXDEV); } /* Before locking the target dir, check we do not replace * a dir with a non-dir, otherwise it may deadlock with * link op which tries to create a link in this dir * back to this non-dir. */ if (S_ISDIR(lu_object_attr(&mnew->mot_obj)) && !S_ISDIR(lu_object_attr(&mold->mot_obj))) GOTO(out_put_new, rc = -EISDIR); lh_oldp = &info->mti_lh[MDT_LH_OLD]; lh_rmt = &info->mti_lh[MDT_LH_RMT]; mdt_lock_reg_init(lh_oldp, LCK_EX); mdt_lock_reg_init(lh_rmt, LCK_EX); lock_ibits = MDS_INODELOCK_LOOKUP | MDS_INODELOCK_XATTR; rc = mdt_rename_source_lock(info, msrcdir, mold, lh_oldp, lh_rmt, lock_ibits, cos_incompat); if (rc < 0) GOTO(out_put_new, rc); /* Check if @msrcdir is subdir of @mnew, before locking child * to avoid reverse locking. */ if (mtgtdir != msrcdir) { rc = mdo_is_subdir(info->mti_env, mdt_object_child(msrcdir), new_fid); if (rc) { if (rc == 1) rc = -EINVAL; GOTO(out_unlock_old, rc); } } /* We used to acquire MDS_INODELOCK_FULL here but we * can't do this now because a running HSM restore on * the rename onto victim will hold the layout * lock. See LU-4002. */ lh_newp = &info->mti_lh[MDT_LH_NEW]; mdt_lock_reg_init(lh_newp, LCK_EX); lock_ibits = MDS_INODELOCK_LOOKUP | MDS_INODELOCK_UPDATE; if (mdt_object_remote(mtgtdir)) { rc = mdt_remote_object_lock(info, mtgtdir, mdt_object_fid(mnew), &lh_newp->mlh_rreg_lh, lh_newp->mlh_rreg_mode, MDS_INODELOCK_LOOKUP, false); if (rc != ELDLM_OK) GOTO(out_unlock_old, rc); lock_ibits &= ~MDS_INODELOCK_LOOKUP; } rc = mdt_reint_object_lock(info, mnew, lh_newp, lock_ibits, cos_incompat); if (rc != 0) GOTO(out_unlock_new, rc); /* get and save version after locking */ mdt_version_get_save(info, mnew, 3); } else if (rc != -ENOENT) { GOTO(out_put_old, rc); } else { lh_oldp = &info->mti_lh[MDT_LH_OLD]; lh_rmt = &info->mti_lh[MDT_LH_RMT]; mdt_lock_reg_init(lh_oldp, LCK_EX); mdt_lock_reg_init(lh_rmt, LCK_EX); lock_ibits = MDS_INODELOCK_LOOKUP | MDS_INODELOCK_XATTR; rc = mdt_rename_source_lock(info, msrcdir, mold, lh_oldp, lh_rmt, lock_ibits, cos_incompat); if (rc != 0) GOTO(out_put_old, rc); 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); if (mnew != NULL) mutex_lock(&mnew->mot_lov_mutex); rc = mdo_rename(info->mti_env, mdt_object_child(msrcdir), mdt_object_child(mtgtdir), old_fid, &rr->rr_name, mnew != NULL ? mdt_object_child(mnew) : NULL, &rr->rr_tgt_name, ma); if (mnew != NULL) mutex_unlock(&mnew->mot_lov_mutex); /* handle last link of tgt object */ if (rc == 0) { mdt_counter_incr(req, LPROC_MDT_RENAME, ktime_us_delta(ktime_get(), kstart)); if (mnew) { mdt_handle_last_unlink(info, mnew, ma); discard = mdt_dom_check_for_discard(info, mnew); } mdt_rename_counter_tally(info, info->mti_mdt, req, msrcdir, mtgtdir, ktime_us_delta(ktime_get(), kstart)); } EXIT; out_unlock_new: if (mnew != NULL) mdt_object_unlock(info, mnew, lh_newp, rc); out_unlock_old: mdt_object_unlock(info, NULL, lh_rmt, rc); mdt_object_unlock(info, mold, lh_oldp, rc); out_put_new: if (mnew && !discard) mdt_object_put(info->mti_env, mnew); out_put_old: mdt_object_put(info->mti_env, mold); out_unlock_parents: mdt_object_unlock(info, mtgtdir, lh_tgtdirp, rc); mdt_object_unlock(info, msrcdir, lh_srcdirp, rc); out_unlock_rename: if (lustre_handle_is_used(&rename_lh)) mdt_rename_unlock(&rename_lh); out_put_tgtdir: mdt_object_put(info->mti_env, mtgtdir); out_put_srcdir: mdt_object_put(info->mti_env, msrcdir); /* The DoM discard can be done right in the place above where it is * assigned, meanwhile it is done here after rename unlock due to * compatibility with old clients, for them the discard blocks * the main thread until completion. Check LU-11359 for details. */ if (discard) { mdt_dom_discard_data(info, mnew); mdt_object_put(info->mti_env, mnew); } return rc; } static int mdt_reint_resync(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 *mo; struct ldlm_lock *lease; struct mdt_body *repbody; struct md_layout_change layout = { .mlc_mirror_id = rr->rr_mirror_id }; bool lease_broken; int rc, rc2; ENTRY; DEBUG_REQ(D_INODE, req, DFID", FLR file resync", PFID(rr->rr_fid1)); if (info->mti_dlm_req) ldlm_request_cancel(req, info->mti_dlm_req, 0, LATF_SKIP); 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_exists(mo)) GOTO(out_obj, rc = -ENOENT); if (!S_ISREG(lu_object_attr(&mo->mot_obj))) GOTO(out_obj, rc = -EINVAL); if (mdt_object_remote(mo)) GOTO(out_obj, rc = -EREMOTE); lease = ldlm_handle2lock(rr->rr_lease_handle); if (lease == NULL) GOTO(out_obj, rc = -ESTALE); /* It's really necessary to grab open_sem and check if the lease lock * has been lost. There would exist a concurrent writer coming in and * generating some dirty data in memory cache, the writeback would fail * after the layout version is increased by MDS_REINT_RESYNC RPC. */ if (!down_write_trylock(&mo->mot_open_sem)) GOTO(out_put_lease, rc = -EBUSY); lock_res_and_lock(lease); lease_broken = ldlm_is_cancel(lease); unlock_res_and_lock(lease); if (lease_broken) GOTO(out_unlock, rc = -EBUSY); /* the file has yet opened by anyone else after we took the lease. */ layout.mlc_opc = MD_LAYOUT_RESYNC; lhc = &info->mti_lh[MDT_LH_LOCAL]; rc = mdt_layout_change(info, mo, lhc, &layout); if (rc) GOTO(out_unlock, rc); mdt_object_unlock(info, mo, lhc, 0); ma->ma_need = MA_INODE; ma->ma_valid = 0; rc = mdt_attr_get_complex(info, mo, ma); if (rc != 0) GOTO(out_unlock, rc); repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY); mdt_pack_attr2body(info, repbody, &ma->ma_attr, mdt_object_fid(mo)); EXIT; out_unlock: up_write(&mo->mot_open_sem); out_put_lease: LDLM_LOCK_PUT(lease); out_obj: mdt_object_put(info->mti_env, mo); out: mdt_client_compatibility(info); rc2 = mdt_fix_reply(info); if (rc == 0) rc = rc2; return rc; } struct mdt_reinter { int (*mr_handler)(struct mdt_thread_info *, struct mdt_lock_handle *); enum lprocfs_extra_opc mr_extra_opc; }; static const struct mdt_reinter mdt_reinters[] = { [REINT_SETATTR] = { .mr_handler = &mdt_reint_setattr, .mr_extra_opc = MDS_REINT_SETATTR, }, [REINT_CREATE] = { .mr_handler = &mdt_reint_create, .mr_extra_opc = MDS_REINT_CREATE, }, [REINT_LINK] = { .mr_handler = &mdt_reint_link, .mr_extra_opc = MDS_REINT_LINK, }, [REINT_UNLINK] = { .mr_handler = &mdt_reint_unlink, .mr_extra_opc = MDS_REINT_UNLINK, }, [REINT_RENAME] = { .mr_handler = &mdt_reint_rename, .mr_extra_opc = MDS_REINT_RENAME, }, [REINT_OPEN] = { .mr_handler = &mdt_reint_open, .mr_extra_opc = MDS_REINT_OPEN, }, [REINT_SETXATTR] = { .mr_handler = &mdt_reint_setxattr, .mr_extra_opc = MDS_REINT_SETXATTR, }, [REINT_RMENTRY] = { .mr_handler = &mdt_reint_unlink, .mr_extra_opc = MDS_REINT_UNLINK, }, [REINT_MIGRATE] = { .mr_handler = &mdt_reint_migrate, .mr_extra_opc = MDS_REINT_RENAME, }, [REINT_RESYNC] = { .mr_handler = &mdt_reint_resync, .mr_extra_opc = MDS_REINT_RESYNC, }, }; int mdt_reint_rec(struct mdt_thread_info *info, struct mdt_lock_handle *lhc) { const struct mdt_reinter *mr; int rc; ENTRY; if (!(info->mti_rr.rr_opcode < ARRAY_SIZE(mdt_reinters))) RETURN(-EPROTO); mr = &mdt_reinters[info->mti_rr.rr_opcode]; if (mr->mr_handler == NULL) RETURN(-EPROTO); rc = (*mr->mr_handler)(info, lhc); lprocfs_counter_incr(ptlrpc_req2svc(mdt_info_req(info))->srv_stats, PTLRPC_LAST_CNTR + mr->mr_extra_opc); RETURN(rc); }