/* * 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_open.c * * Lustre Metadata Target (mdt) open/close file handling * * Author: Huang Hua */ #define DEBUG_SUBSYSTEM S_MDS #include #include #include "mdt_internal.h" /* we do nothing because we do not have refcount now */ static void mdt_mfd_get(void *mfdp) { } static struct portals_handle_ops mfd_handle_ops = { .hop_addref = mdt_mfd_get, .hop_free = NULL, }; /* Create a new mdt_file_data struct, initialize it, * and insert it to global hash table */ struct mdt_file_data *mdt_mfd_new(void) { struct mdt_file_data *mfd; ENTRY; OBD_ALLOC_PTR(mfd); if (mfd != NULL) { CFS_INIT_LIST_HEAD(&mfd->mfd_handle.h_link); CFS_INIT_LIST_HEAD(&mfd->mfd_list); class_handle_hash(&mfd->mfd_handle, &mfd_handle_ops); } RETURN(mfd); } /* * Find the mfd pointed to by handle in global hash table. * In case of replay the handle is obsoleted * but mfd can be found in mfd list by that handle */ struct mdt_file_data *mdt_handle2mfd(struct mdt_thread_info *info, const struct lustre_handle *handle) { struct ptlrpc_request *req = mdt_info_req(info); struct mdt_file_data *mfd; ENTRY; LASSERT(handle != NULL); mfd = class_handle2object(handle->cookie); /* during dw/setattr replay the mfd can be found by old handle */ if (mfd == NULL && req_is_replay(req)) { struct mdt_export_data *med = &req->rq_export->exp_mdt_data; cfs_list_for_each_entry(mfd, &med->med_open_head, mfd_list) { if (mfd->mfd_old_handle.cookie == handle->cookie) RETURN (mfd); } mfd = NULL; } RETURN (mfd); } /* free mfd */ void mdt_mfd_free(struct mdt_file_data *mfd) { LASSERT(cfs_list_empty(&mfd->mfd_list)); OBD_FREE_RCU(mfd, sizeof *mfd, &mfd->mfd_handle); } static int mdt_create_data(struct mdt_thread_info *info, struct mdt_object *p, struct mdt_object *o) { struct md_op_spec *spec = &info->mti_spec; struct md_attr *ma = &info->mti_attr; int rc = 0; ENTRY; if (!md_should_create(spec->sp_cr_flags)) RETURN(0); ma->ma_need = MA_INODE | MA_LOV; ma->ma_valid = 0; mutex_lock(&o->mot_lov_mutex); if (!(o->mot_flags & MOF_LOV_CREATED)) { rc = mdo_create_data(info->mti_env, p ? mdt_object_child(p) : NULL, mdt_object_child(o), spec, ma); if (rc == 0) rc = mdt_attr_get_complex(info, o, ma); if (rc == 0 && ma->ma_valid & MA_LOV) o->mot_flags |= MOF_LOV_CREATED; } mutex_unlock(&o->mot_lov_mutex); RETURN(rc); } static int mdt_ioepoch_opened(struct mdt_object *mo) { return mo->mot_ioepoch_count; } int mdt_object_is_som_enabled(struct mdt_object *mo) { return !mo->mot_ioepoch; } /** * Re-enable Size-on-MDS. * Call under ->mot_ioepoch_mutex. */ static void mdt_object_som_enable(struct mdt_object *mo, __u64 ioepoch) { if (ioepoch == mo->mot_ioepoch) { LASSERT(!mdt_ioepoch_opened(mo)); mo->mot_ioepoch = 0; mo->mot_flags = 0; } } /** * Open the IOEpoch. It is allowed if @writecount is not negative. * The epoch and writecount handling is performed under the mot_ioepoch_mutex. */ int mdt_ioepoch_open(struct mdt_thread_info *info, struct mdt_object *o, int created) { struct mdt_device *mdt = info->mti_mdt; int cancel = 0; int rc = 0; ENTRY; if (!(mdt_conn_flags(info) & OBD_CONNECT_SOM) || !S_ISREG(lu_object_attr(&o->mot_obj.mo_lu))) RETURN(0); mutex_lock(&o->mot_ioepoch_mutex); if (mdt_ioepoch_opened(o)) { /* Epoch continues even if there is no writers yet. */ CDEBUG(D_INODE, "continue epoch "LPU64" for "DFID"\n", o->mot_ioepoch, PFID(mdt_object_fid(o))); } else { /* XXX: ->mdt_ioepoch is not initialized at the mount */ spin_lock(&mdt->mdt_ioepoch_lock); if (mdt->mdt_ioepoch < info->mti_replayepoch) mdt->mdt_ioepoch = info->mti_replayepoch; if (info->mti_replayepoch) o->mot_ioepoch = info->mti_replayepoch; else if (++mdt->mdt_ioepoch == IOEPOCH_INVAL) o->mot_ioepoch = ++mdt->mdt_ioepoch; else o->mot_ioepoch = mdt->mdt_ioepoch; spin_unlock(&mdt->mdt_ioepoch_lock); CDEBUG(D_INODE, "starting epoch "LPU64" for "DFID"\n", o->mot_ioepoch, PFID(mdt_object_fid(o))); if (created) o->mot_flags |= MOF_SOM_CREATED; cancel = 1; } o->mot_ioepoch_count++; mutex_unlock(&o->mot_ioepoch_mutex); /* Cancel Size-on-MDS attributes cached on clients for the open case. * In the truncate case, see mdt_reint_setattr(). */ if (cancel && (info->mti_rr.rr_fid1 != NULL)) { struct mdt_lock_handle *lh = &info->mti_lh[MDT_LH_CHILD]; mdt_lock_reg_init(lh, LCK_EX); rc = mdt_object_lock(info, o, lh, MDS_INODELOCK_UPDATE, MDT_LOCAL_LOCK); if (rc == 0) mdt_object_unlock(info, o, lh, 1); } RETURN(rc); } /** * Update SOM on-disk attributes. * If enabling, write update inodes and lustre-ea with the proper IOEpoch, * mountid and attributes. If disabling, clean SOM xattr. * Call under ->mot_ioepoch_mutex. */ static int mdt_som_attr_set(struct mdt_thread_info *info, struct mdt_object *obj, __u64 ioepoch, bool enable) { struct md_object *next = mdt_object_child(obj); int rc; ENTRY; CDEBUG(D_INODE, "Size-on-MDS attribute %s for epoch "LPU64 " on "DFID".\n", enable ? "update" : "disabling", ioepoch, PFID(mdt_object_fid(obj))); if (enable) { struct lu_buf *buf = &info->mti_buf; struct som_attrs *attrs; struct md_attr *ma = &info->mti_attr; struct lu_attr *la = &ma->ma_attr; struct obd_device *obd = info->mti_mdt->mdt_lut.lut_obd; attrs = (struct som_attrs *)info->mti_xattr_buf; CLASSERT(sizeof(info->mti_xattr_buf) >= sizeof(*attrs)); /* pack SOM attributes */ memset(attrs, 0, sizeof(*attrs)); attrs->som_ioepoch = ioepoch; attrs->som_mountid = obd->u.obt.obt_mount_count; if ((la->la_valid & LA_SIZE) != 0) attrs->som_size = la->la_size; if ((la->la_valid & LA_BLOCKS) != 0) attrs->som_blocks = la->la_blocks; lustre_som_swab(attrs); /* update SOM attributes */ buf->lb_buf = attrs; buf->lb_len = sizeof(*attrs); rc = mo_xattr_set(info->mti_env, next, buf, XATTR_NAME_SOM, 0); } else { /* delete SOM attributes */ rc = mo_xattr_del(info->mti_env, next, XATTR_NAME_SOM); } RETURN(rc); } /** Perform the eviction specific actions on ioepoch close. */ static inline int mdt_ioepoch_close_on_eviction(struct mdt_thread_info *info, struct mdt_object *o) { int rc = 0; mutex_lock(&o->mot_ioepoch_mutex); CDEBUG(D_INODE, "Eviction. Closing IOepoch "LPU64" on "DFID". " "Count %d\n", o->mot_ioepoch, PFID(mdt_object_fid(o)), o->mot_ioepoch_count); o->mot_ioepoch_count--; /* If eviction occured set MOF_SOM_RECOV, * if no other epoch holders, disable SOM on disk. */ o->mot_flags |= MOF_SOM_CHANGE | MOF_SOM_RECOV; if (!mdt_ioepoch_opened(o)) { rc = mdt_som_attr_set(info, o, o->mot_ioepoch, MDT_SOM_DISABLE); mdt_object_som_enable(o, o->mot_ioepoch); } mutex_unlock(&o->mot_ioepoch_mutex); RETURN(rc); } /** * Perform the replay specific actions on ioepoch close. * Skip SOM attribute update if obtained and just forget about the inode state * for the last ioepoch holder. The SOM cache is invalidated on MDS failure. */ static inline int mdt_ioepoch_close_on_replay(struct mdt_thread_info *info, struct mdt_object *o) { int rc = MDT_IOEPOCH_CLOSED; ENTRY; mutex_lock(&o->mot_ioepoch_mutex); CDEBUG(D_INODE, "Replay. Closing epoch "LPU64" on "DFID". Count %d\n", o->mot_ioepoch, PFID(mdt_object_fid(o)), o->mot_ioepoch_count); o->mot_ioepoch_count--; /* Get an info from the replayed request if client is supposed * to send an Attibute Update, reconstruct @rc if so */ if (info->mti_ioepoch->flags & MF_SOM_AU) rc = MDT_IOEPOCH_GETATTR; if (!mdt_ioepoch_opened(o)) mdt_object_som_enable(o, info->mti_ioepoch->ioepoch); mutex_unlock(&o->mot_ioepoch_mutex); RETURN(rc); } /** * Regular file IOepoch close. * Closes the ioepoch, checks the object state, apply obtained attributes and * re-enable SOM on the object, if possible. Also checks if the recovery is * needed and packs OBD_MD_FLGETATTRLOCK flag into the reply to force the client * to obtain SOM attributes under the server-side OST locks. * * Return value: * MDT_IOEPOCH_CLOSED if ioepoch is closed. * MDT_IOEPOCH_GETATTR if ioepoch is closed but another SOM update is needed. */ static inline int mdt_ioepoch_close_reg(struct mdt_thread_info *info, struct mdt_object *o) { struct md_attr *tmp_ma; struct lu_attr *la; int achange, opened; int recovery = 0; int rc = 0, ret = MDT_IOEPOCH_CLOSED; ENTRY; la = &info->mti_attr.ma_attr; achange = (info->mti_ioepoch->flags & MF_SOM_CHANGE); mutex_lock(&o->mot_ioepoch_mutex); o->mot_ioepoch_count--; tmp_ma = &info->mti_u.som.attr; tmp_ma->ma_lmm = info->mti_attr.ma_lmm; tmp_ma->ma_lmm_size = info->mti_attr.ma_lmm_size; tmp_ma->ma_som = &info->mti_u.som.data; tmp_ma->ma_need = MA_INODE | MA_LOV | MA_SOM; tmp_ma->ma_valid = 0; rc = mdt_attr_get_complex(info, o, tmp_ma); if (rc) GOTO(error_up, rc); /* Check the on-disk SOM state. */ if (o->mot_flags & MOF_SOM_RECOV) recovery = 1; else if (!(o->mot_flags & MOF_SOM_CREATED) && !(tmp_ma->ma_valid & MA_SOM)) recovery = 1; CDEBUG(D_INODE, "Closing epoch "LPU64" on "DFID". Count %d\n", o->mot_ioepoch, PFID(mdt_object_fid(o)), o->mot_ioepoch_count); opened = mdt_ioepoch_opened(o); /** * If IOEpoch is not opened, check if a Size-on-MDS update is needed. * Skip the check for file with no LOV or for unlink files. */ if (!opened && tmp_ma->ma_valid & MA_LOV && !(tmp_ma->ma_valid & MA_INODE && tmp_ma->ma_attr.la_nlink == 0)) { if (recovery) /* If some previous writer was evicted, re-ask the * client for attributes. Even if attributes are * provided, we cannot believe in them. * Another use case is that there is no SOM cache on * disk -- first access with SOM or there was an MDS * failure. */ ret = MDT_IOEPOCH_GETATTR; else if (o->mot_flags & MOF_SOM_CHANGE) /* Some previous writer changed the attribute. * Do not believe to the current Size-on-MDS * update, re-ask client. */ ret = MDT_IOEPOCH_GETATTR; else if (!(la->la_valid & LA_SIZE) && achange) /* Attributes were changed by the last writer * only but no Size-on-MDS update is received.*/ ret = MDT_IOEPOCH_GETATTR; } if (achange || ret == MDT_IOEPOCH_GETATTR) o->mot_flags |= MOF_SOM_CHANGE; /* If epoch ends and relable SOM attributes are obtained, update them. * Create SOM ea for new files even if there is no attributes obtained * (0-length file). */ if (ret == MDT_IOEPOCH_CLOSED && !opened) { if (achange || o->mot_flags & MOF_SOM_CREATED) { LASSERT(achange || !(la->la_valid & LA_SIZE)); rc = mdt_som_attr_set(info, o, o->mot_ioepoch, MDT_SOM_ENABLE); /* Avoid the following setattrs of these attributes, * e.g. for atime update. */ info->mti_attr.ma_valid = 0; } mdt_object_som_enable(o, o->mot_ioepoch); } mutex_unlock(&o->mot_ioepoch_mutex); /* If recovery is needed, tell the client to perform GETATTR under * the lock. */ if (ret == MDT_IOEPOCH_GETATTR && recovery) { struct mdt_body *rep; rep = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY); rep->valid |= OBD_MD_FLGETATTRLOCK; } RETURN(rc ? : ret); error_up: mutex_unlock(&o->mot_ioepoch_mutex); return rc; } /** * Close IOEpoch (opened file or MDS_FMODE_EPOCH state). It happens if: * - a client closes the IOEpoch; * - a client eviction occured. * Return values: * MDT_IOEPOCH_OPENED if the client does not close IOEpoch. * MDT_IOEPOCH_CLOSED if the client closes IOEpoch. * MDT_IOEPOCH_GETATTR if the client closes IOEpoch but another SOM attribute * update is needed. */ static int mdt_ioepoch_close(struct mdt_thread_info *info, struct mdt_object *o) { struct ptlrpc_request *req = mdt_info_req(info); ENTRY; if (!(mdt_conn_flags(info) & OBD_CONNECT_SOM) || !S_ISREG(lu_object_attr(&o->mot_obj.mo_lu))) RETURN(0); LASSERT(o->mot_ioepoch_count); LASSERT(info->mti_ioepoch == NULL || info->mti_ioepoch->ioepoch == o->mot_ioepoch); /* IOEpoch is closed only if client tells about it or eviction occures. * In the replay case, always close the epoch. */ if (req == NULL) RETURN(mdt_ioepoch_close_on_eviction(info, o)); if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY) RETURN(mdt_ioepoch_close_on_replay(info, o)); if (info->mti_ioepoch->flags & MF_EPOCH_CLOSE) RETURN(mdt_ioepoch_close_reg(info, o)); /* IO epoch is not closed. */ RETURN(MDT_IOEPOCH_OPENED); } /** * Close MDS_FMODE_SOM state, when IOEpoch is already closed and we are waiting * for attribute update. It happens if: * - SOM Attribute Update is obtained; * - the client failed to obtain it and informs MDS about it; * - a client eviction occured. * Apply obtained attributes for the 1st case, wipe out the on-disk SOM * cache otherwise. */ int mdt_som_au_close(struct mdt_thread_info *info, struct mdt_object *o) { struct ptlrpc_request *req = mdt_info_req(info); __u64 ioepoch = 0; int act = MDT_SOM_ENABLE; int rc = 0; ENTRY; LASSERT(!req || info->mti_ioepoch); if (!(mdt_conn_flags(info) & OBD_CONNECT_SOM) || !S_ISREG(lu_object_attr(&o->mot_obj.mo_lu))) RETURN(0); /* No size whereas MF_SOM_CHANGE is set means client failed to * obtain ost attributes, drop the SOM cache on disk if so. */ if (!req || (info->mti_ioepoch && info->mti_ioepoch->flags & MF_SOM_CHANGE && !(info->mti_attr.ma_attr.la_valid & LA_SIZE))) act = MDT_SOM_DISABLE; mutex_lock(&o->mot_ioepoch_mutex); /* Mark the object it is the recovery state if we failed to obtain * SOM attributes. */ if (act == MDT_SOM_DISABLE) o->mot_flags |= MOF_SOM_RECOV; if (!mdt_ioepoch_opened(o)) { ioepoch = info->mti_ioepoch ? info->mti_ioepoch->ioepoch : o->mot_ioepoch; if (!(lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY)) rc = mdt_som_attr_set(info, o, ioepoch, act); mdt_object_som_enable(o, ioepoch); } mutex_unlock(&o->mot_ioepoch_mutex); RETURN(rc); } int mdt_write_read(struct mdt_object *o) { int rc = 0; ENTRY; mutex_lock(&o->mot_ioepoch_mutex); rc = o->mot_writecount; mutex_unlock(&o->mot_ioepoch_mutex); RETURN(rc); } int mdt_write_get(struct mdt_object *o) { int rc = 0; ENTRY; mutex_lock(&o->mot_ioepoch_mutex); if (o->mot_writecount < 0) rc = -ETXTBSY; else o->mot_writecount++; mutex_unlock(&o->mot_ioepoch_mutex); RETURN(rc); } void mdt_write_put(struct mdt_object *o) { ENTRY; mutex_lock(&o->mot_ioepoch_mutex); o->mot_writecount--; mutex_unlock(&o->mot_ioepoch_mutex); EXIT; } static int mdt_write_deny(struct mdt_object *o) { int rc = 0; ENTRY; mutex_lock(&o->mot_ioepoch_mutex); if (o->mot_writecount > 0) rc = -ETXTBSY; else o->mot_writecount--; mutex_unlock(&o->mot_ioepoch_mutex); RETURN(rc); } static void mdt_write_allow(struct mdt_object *o) { ENTRY; mutex_lock(&o->mot_ioepoch_mutex); o->mot_writecount++; mutex_unlock(&o->mot_ioepoch_mutex); EXIT; } /* there can be no real transaction so prepare the fake one */ static void mdt_empty_transno(struct mdt_thread_info *info, int rc) { struct mdt_device *mdt = info->mti_mdt; struct ptlrpc_request *req = mdt_info_req(info); struct tg_export_data *ted; struct lsd_client_data *lcd; ENTRY; /* transaction has occurred already */ if (lustre_msg_get_transno(req->rq_repmsg) != 0) RETURN_EXIT; spin_lock(&mdt->mdt_lut.lut_translock); if (rc != 0) { if (info->mti_transno != 0) { struct obd_export *exp = req->rq_export; CERROR("%s: replay trans "LPU64" NID %s: rc = %d\n", mdt->mdt_md_dev.md_lu_dev.ld_obd->obd_name, info->mti_transno, libcfs_nid2str(exp->exp_connection->c_peer.nid), rc); RETURN_EXIT; } } else if (info->mti_transno == 0) { info->mti_transno = ++mdt->mdt_lut.lut_last_transno; } else { /* should be replay */ if (info->mti_transno > mdt->mdt_lut.lut_last_transno) mdt->mdt_lut.lut_last_transno = info->mti_transno; } spin_unlock(&mdt->mdt_lut.lut_translock); CDEBUG(D_INODE, "transno = "LPU64", last_committed = "LPU64"\n", info->mti_transno, req->rq_export->exp_obd->obd_last_committed); req->rq_transno = info->mti_transno; lustre_msg_set_transno(req->rq_repmsg, info->mti_transno); /* update lcd in memory only for resent cases */ ted = &req->rq_export->exp_target_data; LASSERT(ted); mutex_lock(&ted->ted_lcd_lock); lcd = ted->ted_lcd; if (info->mti_transno < lcd->lcd_last_transno && info->mti_transno != 0) { /* This should happen during replay. Do not update * last rcvd info if replay req transno < last transno, * otherwise the following resend(after replay) can not * be checked correctly by xid */ mutex_unlock(&ted->ted_lcd_lock); CDEBUG(D_HA, "%s: transno = "LPU64" < last_transno = "LPU64"\n", mdt->mdt_md_dev.md_lu_dev.ld_obd->obd_name, info->mti_transno, lcd->lcd_last_transno); RETURN_EXIT; } if (lustre_msg_get_opc(req->rq_reqmsg) == MDS_CLOSE || lustre_msg_get_opc(req->rq_reqmsg) == MDS_DONE_WRITING) { if (info->mti_transno != 0) lcd->lcd_last_close_transno = info->mti_transno; lcd->lcd_last_close_xid = req->rq_xid; lcd->lcd_last_close_result = rc; } else { /* VBR: save versions in last_rcvd for reconstruct. */ __u64 *pre_versions = lustre_msg_get_versions(req->rq_repmsg); if (pre_versions) { lcd->lcd_pre_versions[0] = pre_versions[0]; lcd->lcd_pre_versions[1] = pre_versions[1]; lcd->lcd_pre_versions[2] = pre_versions[2]; lcd->lcd_pre_versions[3] = pre_versions[3]; } if (info->mti_transno != 0) lcd->lcd_last_transno = info->mti_transno; lcd->lcd_last_xid = req->rq_xid; lcd->lcd_last_result = rc; lcd->lcd_last_data = info->mti_opdata; } mutex_unlock(&ted->ted_lcd_lock); EXIT; } void mdt_mfd_set_mode(struct mdt_file_data *mfd, int mode) { LASSERT(mfd != NULL); CDEBUG(D_HA, "Change mfd %p mode 0x%x->0x%x\n", mfd, (unsigned int)mfd->mfd_mode, (unsigned int)mode); mfd->mfd_mode = mode; } static int mdt_mfd_open(struct mdt_thread_info *info, struct mdt_object *p, struct mdt_object *o, __u64 flags, int created) { 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 md_attr *ma = &info->mti_attr; struct lu_attr *la = &ma->ma_attr; struct mdt_body *repbody; int rc = 0, isdir, isreg; ENTRY; repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY); isreg = S_ISREG(la->la_mode); isdir = S_ISDIR(la->la_mode); if (isreg && !(ma->ma_valid & MA_LOV)) { /* * No EA, check whether it is will set regEA and dirEA since in * above attr get, these size might be zero, so reset it, to * retrieve the MD after create obj. */ ma->ma_lmm_size = req_capsule_get_size(info->mti_pill, &RMF_MDT_MD, RCL_SERVER); /* in replay case, p == NULL */ rc = mdt_create_data(info, p, o); if (rc) RETURN(rc); } CDEBUG(D_INODE, "after open, ma_valid bit = "LPX64" lmm_size = %d\n", ma->ma_valid, ma->ma_lmm_size); if (ma->ma_valid & MA_LOV) { LASSERT(ma->ma_lmm_size != 0); repbody->eadatasize = ma->ma_lmm_size; if (isdir) repbody->valid |= OBD_MD_FLDIREA; else repbody->valid |= OBD_MD_FLEASIZE; } if (flags & FMODE_WRITE) { rc = mdt_write_get(o); if (rc == 0) { mdt_ioepoch_open(info, o, created); repbody->ioepoch = o->mot_ioepoch; } } else if (flags & MDS_FMODE_EXEC) { rc = mdt_write_deny(o); } if (rc) RETURN(rc); rc = mo_open(info->mti_env, mdt_object_child(o), created ? flags | MDS_OPEN_CREATED : flags); if (rc) GOTO(err_out, rc); mfd = mdt_mfd_new(); if (mfd != NULL) { /* * Keep a reference on this object for this open, and is * released by mdt_mfd_close(). */ mdt_object_get(info->mti_env, o); /* * @flags is always not zero. At least it should be FMODE_READ, * FMODE_WRITE or MDS_FMODE_EXEC. */ LASSERT(flags != 0); /* Open handling. */ mdt_mfd_set_mode(mfd, flags); mfd->mfd_object = o; mfd->mfd_xid = req->rq_xid; /* replay handle */ if (req_is_replay(req)) { struct mdt_file_data *old_mfd; /* Check wheather old cookie already exist in * the list, becasue when do recovery, client * might be disconnected from server, and * restart replay, so there maybe some orphan * mfd here, we should remove them */ LASSERT(info->mti_rr.rr_handle != NULL); old_mfd = mdt_handle2mfd(info, info->mti_rr.rr_handle); if (old_mfd) { CDEBUG(D_HA, "del orph mfd %p fid=("DFID") " "cookie=" LPX64"\n", mfd, PFID(mdt_object_fid(mfd->mfd_object)), info->mti_rr.rr_handle->cookie); spin_lock(&med->med_open_lock); class_handle_unhash(&old_mfd->mfd_handle); cfs_list_del_init(&old_mfd->mfd_list); spin_unlock(&med->med_open_lock); /* no attr update for that close */ la->la_valid = 0; ma->ma_valid |= MA_FLAGS; ma->ma_attr_flags |= MDS_RECOV_OPEN; mdt_mfd_close(info, old_mfd); ma->ma_attr_flags &= ~MDS_RECOV_OPEN; ma->ma_valid &= ~MA_FLAGS; } CDEBUG(D_HA, "Store old cookie "LPX64" in new mfd\n", info->mti_rr.rr_handle->cookie); mfd->mfd_old_handle.cookie = info->mti_rr.rr_handle->cookie; } repbody->handle.cookie = mfd->mfd_handle.h_cookie; if (req->rq_export->exp_disconnected) { spin_lock(&med->med_open_lock); 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 { spin_lock(&med->med_open_lock); cfs_list_add(&mfd->mfd_list, &med->med_open_head); spin_unlock(&med->med_open_lock); } mdt_empty_transno(info, rc); } else { GOTO(err_out, rc = -ENOMEM); } RETURN(rc); err_out: if (flags & FMODE_WRITE) /* XXX We also need to close io epoch here. * See LU-1220 - green */ mdt_write_put(o); else if (flags & FMODE_EXEC) mdt_write_allow(o); return rc; } int mdt_finish_open(struct mdt_thread_info *info, struct mdt_object *p, struct mdt_object *o, __u64 flags, int created, struct ldlm_reply *rep) { struct ptlrpc_request *req = mdt_info_req(info); struct obd_export *exp = req->rq_export; struct mdt_export_data *med = &req->rq_export->exp_mdt_data; struct md_attr *ma = &info->mti_attr; struct lu_attr *la = &ma->ma_attr; struct mdt_file_data *mfd; struct mdt_body *repbody; int rc = 0; int isreg, isdir, islnk; cfs_list_t *t; ENTRY; LASSERT(ma->ma_valid & MA_INODE); repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY); isreg = S_ISREG(la->la_mode); isdir = S_ISDIR(la->la_mode); islnk = S_ISLNK(la->la_mode); mdt_pack_attr2body(info, repbody, la, mdt_object_fid(o)); /* LU-2275, simulate broken behaviour (esp. prevalent in * pre-2.4 servers where a very strange reply is sent on error * that looks like it was actually almost succesful and a failure at the * same time */ if (OBD_FAIL_CHECK(OBD_FAIL_MDS_NEGATIVE_POSITIVE)) { mdt_set_disposition(info, rep, DISP_OPEN_LOCK | \ DISP_OPEN_OPEN | DISP_LOOKUP_NEG | \ DISP_LOOKUP_POS); RETURN(-ENOENT); } if (exp_connect_rmtclient(exp)) { void *buf = req_capsule_server_get(info->mti_pill, &RMF_ACL); rc = mdt_pack_remote_perm(info, o, buf); if (rc) { repbody->valid &= ~OBD_MD_FLRMTPERM; repbody->aclsize = 0; } else { repbody->valid |= OBD_MD_FLRMTPERM; repbody->aclsize = sizeof(struct mdt_remote_perm); } } #ifdef CONFIG_FS_POSIX_ACL else if (exp->exp_connect_flags & OBD_CONNECT_ACL) { const struct lu_env *env = info->mti_env; struct md_object *next = mdt_object_child(o); struct lu_buf *buf = &info->mti_buf; buf->lb_buf = req_capsule_server_get(info->mti_pill, &RMF_ACL); buf->lb_len = req_capsule_get_size(info->mti_pill, &RMF_ACL, RCL_SERVER); if (buf->lb_len > 0) { rc = mo_xattr_get(env, next, buf, XATTR_NAME_ACL_ACCESS); if (rc < 0) { if (rc == -ENODATA) { repbody->aclsize = 0; repbody->valid |= OBD_MD_FLACL; rc = 0; } else if (rc == -EOPNOTSUPP) { rc = 0; } else { CERROR("got acl size: %d\n", rc); } } else { repbody->aclsize = rc; repbody->valid |= OBD_MD_FLACL; rc = 0; } } } #endif if (info->mti_mdt->mdt_opts.mo_mds_capa && 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(o), capa, 0); if (rc) RETURN(rc); repbody->valid |= OBD_MD_FLMDSCAPA; } if (info->mti_mdt->mdt_opts.mo_oss_capa && exp->exp_connect_flags & OBD_CONNECT_OSS_CAPA && S_ISREG(lu_object_attr(&o->mot_obj.mo_lu))) { struct lustre_capa *capa; capa = req_capsule_server_get(info->mti_pill, &RMF_CAPA2); LASSERT(capa); capa->lc_opc = CAPA_OPC_OSS_DEFAULT | capa_open_opc(flags); rc = mo_capa_get(info->mti_env, mdt_object_child(o), capa, 0); if (rc) RETURN(rc); repbody->valid |= OBD_MD_FLOSSCAPA; } /* * If we are following a symlink, don't open; and do not return open * handle for special nodes as client required. */ if (islnk || (!isreg && !isdir && (req->rq_export->exp_connect_flags & OBD_CONNECT_NODEVOH))) { lustre_msg_set_transno(req->rq_repmsg, 0); RETURN(0); } /* * We need to return the existing object's fid back, so it is done here, * after preparing the reply. */ if (!created && (flags & MDS_OPEN_EXCL) && (flags & MDS_OPEN_CREAT)) RETURN(-EEXIST); /* This can't be done earlier, we need to return reply body */ if (isdir) { if (flags & (MDS_OPEN_CREAT | FMODE_WRITE)) { /* We are trying to create or write an existing dir. */ RETURN(-EISDIR); } } else if (flags & MDS_OPEN_DIRECTORY) RETURN(-ENOTDIR); if (OBD_FAIL_CHECK_RESET(OBD_FAIL_MDS_OPEN_CREATE, OBD_FAIL_LDLM_REPLY | OBD_FAIL_ONCE)) { RETURN(-EAGAIN); } mfd = NULL; if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_RESENT) { spin_lock(&med->med_open_lock); cfs_list_for_each(t, &med->med_open_head) { mfd = cfs_list_entry(t, struct mdt_file_data, mfd_list); if (mfd->mfd_xid == req->rq_xid) break; mfd = NULL; } spin_unlock(&med->med_open_lock); if (mfd != NULL) { repbody->handle.cookie = mfd->mfd_handle.h_cookie; /*set repbody->ea_size for resent case*/ if (ma->ma_valid & MA_LOV) { LASSERT(ma->ma_lmm_size != 0); repbody->eadatasize = ma->ma_lmm_size; if (isdir) repbody->valid |= OBD_MD_FLDIREA; else repbody->valid |= OBD_MD_FLEASIZE; } mdt_set_disposition(info, rep, DISP_OPEN_OPEN); RETURN(0); } } rc = mdt_mfd_open(info, p, o, flags, created); if (!rc) mdt_set_disposition(info, rep, DISP_OPEN_OPEN); RETURN(rc); } extern void mdt_req_from_lcd(struct ptlrpc_request *req, struct lsd_client_data *lcd); void mdt_reconstruct_open(struct mdt_thread_info *info, struct mdt_lock_handle *lhc) { const struct lu_env *env = info->mti_env; struct mdt_device *mdt = info->mti_mdt; struct req_capsule *pill = info->mti_pill; struct ptlrpc_request *req = mdt_info_req(info); struct tg_export_data *ted = &req->rq_export->exp_target_data; struct lsd_client_data *lcd = ted->ted_lcd; struct md_attr *ma = &info->mti_attr; struct mdt_reint_record *rr = &info->mti_rr; __u32 flags = info->mti_spec.sp_cr_flags; struct ldlm_reply *ldlm_rep; struct mdt_object *parent; struct mdt_object *child; struct mdt_body *repbody; int rc; ENTRY; LASSERT(pill->rc_fmt == &RQF_LDLM_INTENT_OPEN); ldlm_rep = req_capsule_server_get(pill, &RMF_DLM_REP); repbody = req_capsule_server_get(pill, &RMF_MDT_BODY); ma->ma_lmm = req_capsule_server_get(pill, &RMF_MDT_MD); ma->ma_lmm_size = req_capsule_get_size(pill, &RMF_MDT_MD, RCL_SERVER); ma->ma_need = MA_INODE; if (ma->ma_lmm_size > 0) ma->ma_need |= MA_LOV; ma->ma_valid = 0; mdt_req_from_lcd(req, lcd); mdt_set_disposition(info, ldlm_rep, lcd->lcd_last_data); CDEBUG(D_INODE, "This is reconstruct open: disp="LPX64", result=%d\n", ldlm_rep->lock_policy_res1, req->rq_status); if (mdt_get_disposition(ldlm_rep, DISP_OPEN_CREATE) && req->rq_status != 0) /* We did not create successfully, return error to client. */ GOTO(out, rc = req->rq_status); if (mdt_get_disposition(ldlm_rep, DISP_OPEN_CREATE)) { struct obd_export *exp = req->rq_export; /* * We failed after creation, but we do not know in which step * we failed. So try to check the child object. */ parent = mdt_object_find(env, mdt, rr->rr_fid1); if (IS_ERR(parent)) { rc = PTR_ERR(parent); LCONSOLE_WARN("Parent "DFID" lookup error %d." " Evicting client %s with export %s.\n", PFID(rr->rr_fid1), rc, obd_uuid2str(&exp->exp_client_uuid), obd_export_nid2str(exp)); mdt_export_evict(exp); RETURN_EXIT; } child = mdt_object_find(env, mdt, rr->rr_fid2); if (IS_ERR(child)) { rc = PTR_ERR(child); LCONSOLE_WARN("Child "DFID" lookup error %d." " Evicting client %s with export %s.\n", PFID(mdt_object_fid(child)), rc, obd_uuid2str(&exp->exp_client_uuid), obd_export_nid2str(exp)); mdt_object_put(env, parent); mdt_export_evict(exp); RETURN_EXIT; } rc = mdt_object_exists(child); if (rc > 0) { mdt_set_capainfo(info, 1, rr->rr_fid2, BYPASS_CAPA); rc = mdt_attr_get_complex(info, child, ma); if (rc == 0) rc = mdt_finish_open(info, parent, child, flags, 1, ldlm_rep); } else if (rc < 0) { /* the child object was created on remote server */ repbody->fid1 = *rr->rr_fid2; repbody->valid |= (OBD_MD_FLID | OBD_MD_MDS); rc = 0; } else if (rc == 0) { /* the child does not exist, we should do regular open */ mdt_object_put(env, parent); mdt_object_put(env, child); GOTO(regular_open, 0); } mdt_object_put(env, parent); mdt_object_put(env, child); GOTO(out, rc); } else { regular_open: /* We did not try to create, so we are a pure open */ rc = mdt_reint_open(info, lhc); } EXIT; out: req->rq_status = rc; lustre_msg_set_status(req->rq_repmsg, req->rq_status); LASSERT(ergo(rc < 0, lustre_msg_get_transno(req->rq_repmsg) == 0)); } int mdt_open_by_fid(struct mdt_thread_info* info, struct ldlm_reply *rep) { __u32 flags = info->mti_spec.sp_cr_flags; struct mdt_reint_record *rr = &info->mti_rr; struct md_attr *ma = &info->mti_attr; struct mdt_object *o; int rc; ENTRY; o = mdt_object_find(info->mti_env, info->mti_mdt, rr->rr_fid2); if (IS_ERR(o)) RETURN(rc = PTR_ERR(o)); rc = mdt_object_exists(o); if (rc > 0) { mdt_set_disposition(info, rep, (DISP_IT_EXECD | DISP_LOOKUP_EXECD | DISP_LOOKUP_POS)); rc = mdt_attr_get_complex(info, o, ma); if (rc == 0) rc = mdt_finish_open(info, NULL, o, flags, 0, rep); } else if (rc == 0) { rc = -ENOENT; } else { /* the child object was created on remote server */ struct mdt_body *repbody; repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY); repbody->fid1 = *rr->rr_fid2; repbody->valid |= (OBD_MD_FLID | OBD_MD_MDS); rc = 0; } mdt_object_put(info->mti_env, o); RETURN(rc); } int mdt_open_by_fid_lock(struct mdt_thread_info *info, struct ldlm_reply *rep, struct mdt_lock_handle *lhc) { const struct lu_env *env = info->mti_env; struct mdt_device *mdt = info->mti_mdt; __u32 flags = info->mti_spec.sp_cr_flags; struct mdt_reint_record *rr = &info->mti_rr; struct md_attr *ma = &info->mti_attr; struct mdt_object *parent= NULL; struct mdt_object *o; int rc; ldlm_mode_t lm; ENTRY; if (md_should_create(flags) && !(flags & MDS_OPEN_HAS_EA)) { if (!lu_fid_eq(rr->rr_fid1, rr->rr_fid2)) { parent = mdt_object_find(env, mdt, rr->rr_fid1); if (IS_ERR(parent)) { CDEBUG(D_INODE, "Fail to find parent "DFID " for anonymous created %ld, try to" " use server-side parent.\n", PFID(rr->rr_fid1), PTR_ERR(parent)); parent = NULL; } } if (parent == NULL) ma->ma_need |= MA_PFID; } o = mdt_object_find(env, mdt, rr->rr_fid2); if (IS_ERR(o)) RETURN(rc = PTR_ERR(o)); rc = mdt_object_exists(o); if (rc == 0) { mdt_set_disposition(info, rep, (DISP_LOOKUP_EXECD | DISP_LOOKUP_NEG)); GOTO(out, rc = -ENOENT); } else if (rc < 0) { CERROR("NFS remote open shouldn't happen.\n"); GOTO(out, rc); } mdt_set_disposition(info, rep, (DISP_IT_EXECD | DISP_LOOKUP_EXECD)); if (flags & FMODE_WRITE) lm = LCK_CW; else if (flags & MDS_FMODE_EXEC) lm = LCK_PR; else lm = LCK_CR; mdt_lock_handle_init(lhc); mdt_lock_reg_init(lhc, lm); rc = mdt_object_lock(info, o, lhc, MDS_INODELOCK_LOOKUP | MDS_INODELOCK_OPEN, MDT_CROSS_LOCK); if (rc) GOTO(out, rc); rc = mdt_attr_get_complex(info, o, ma); if (rc) GOTO(out, rc); if (ma->ma_valid & MA_PFID) { parent = mdt_object_find(env, mdt, &ma->ma_pfid); if (IS_ERR(parent)) { CDEBUG(D_INODE, "Fail to find parent "DFID " for anonymous created %ld, try to" " use system default.\n", PFID(&ma->ma_pfid), PTR_ERR(parent)); parent = NULL; } } rc = mdt_finish_open(info, parent, o, flags, 0, rep); if (!(flags & MDS_OPEN_LOCK) || rc) mdt_object_unlock(info, o, lhc, 1); if (!rc) { mdt_set_disposition(info, rep, DISP_LOOKUP_POS); if (flags & MDS_OPEN_LOCK) mdt_set_disposition(info, rep, DISP_OPEN_LOCK); } GOTO(out, rc); out: mdt_object_put(env, o); if (parent != NULL) mdt_object_put(env, parent); return rc; } int mdt_pin(struct mdt_thread_info* info) { ENTRY; RETURN(err_serious(-EOPNOTSUPP)); } /* Cross-ref request. Currently it can only be a pure open (w/o create) */ int mdt_cross_open(struct mdt_thread_info* info, const struct lu_fid *fid, struct ldlm_reply *rep, __u32 flags) { struct md_attr *ma = &info->mti_attr; struct mdt_object *o; int rc; ENTRY; o = mdt_object_find(info->mti_env, info->mti_mdt, fid); if (IS_ERR(o)) RETURN(rc = PTR_ERR(o)); rc = mdt_object_exists(o); if (rc > 0) { /* Do permission check for cross-open. */ rc = mo_permission(info->mti_env, NULL, mdt_object_child(o), NULL, flags | MDS_OPEN_CROSS); if (rc) goto out; mdt_set_capainfo(info, 0, fid, BYPASS_CAPA); rc = mdt_attr_get_complex(info, o, ma); if (rc == 0) rc = mdt_finish_open(info, NULL, o, flags, 0, rep); } else if (rc == 0) { /* * Something is wrong here. lookup was positive but there is * no object! */ CERROR("Cross-ref object doesn't exist!\n"); rc = -EFAULT; } else { /* Something is wrong here, the object is on another MDS! */ CERROR("The object isn't on this server! FLD error?\n"); LU_OBJECT_DEBUG(D_WARNING, info->mti_env, &o->mot_obj.mo_lu, "Object isn't on this server! FLD error?\n"); rc = -EFAULT; } out: mdt_object_put(info->mti_env, o); RETURN(rc); } int mdt_reint_open(struct mdt_thread_info *info, struct mdt_lock_handle *lhc) { struct mdt_device *mdt = info->mti_mdt; struct ptlrpc_request *req = mdt_info_req(info); struct mdt_object *parent; struct mdt_object *child; struct mdt_lock_handle *lh; struct ldlm_reply *ldlm_rep; struct mdt_body *repbody; struct lu_fid *child_fid = &info->mti_tmp_fid1; struct md_attr *ma = &info->mti_attr; __u64 create_flags = info->mti_spec.sp_cr_flags; struct mdt_reint_record *rr = &info->mti_rr; struct lu_name *lname; int result, rc; int created = 0; __u32 msg_flags; ENTRY; OBD_FAIL_TIMEOUT_ORSET(OBD_FAIL_MDS_PAUSE_OPEN, OBD_FAIL_ONCE, (obd_timeout + 1) / 4); mdt_counter_incr(req, LPROC_MDT_OPEN); repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY); ma->ma_lmm = req_capsule_server_get(info->mti_pill, &RMF_MDT_MD); ma->ma_lmm_size = req_capsule_get_size(info->mti_pill, &RMF_MDT_MD, RCL_SERVER); ma->ma_need = MA_INODE; if (ma->ma_lmm_size > 0) ma->ma_need |= MA_LOV; ma->ma_valid = 0; LASSERT(info->mti_pill->rc_fmt == &RQF_LDLM_INTENT_OPEN); ldlm_rep = req_capsule_server_get(info->mti_pill, &RMF_DLM_REP); if (unlikely(create_flags & MDS_OPEN_JOIN_FILE)) { CERROR("file join is not supported anymore.\n"); GOTO(out, result = err_serious(-EOPNOTSUPP)); } msg_flags = lustre_msg_get_flags(req->rq_reqmsg); if ((create_flags & (MDS_OPEN_HAS_EA | MDS_OPEN_HAS_OBJS)) && info->mti_spec.u.sp_ea.eadata == NULL) GOTO(out, result = err_serious(-EINVAL)); CDEBUG(D_INODE, "I am going to open "DFID"/(%s->"DFID") " "cr_flag="LPO64" mode=0%06o msg_flag=0x%x\n", PFID(rr->rr_fid1), rr->rr_name, PFID(rr->rr_fid2), create_flags, ma->ma_attr.la_mode, msg_flags); if (req_is_replay(req) || (req->rq_export->exp_libclient && create_flags & MDS_OPEN_HAS_EA)) { /* This is a replay request or from liblustre with ea. */ result = mdt_open_by_fid(info, ldlm_rep); if (result != -ENOENT) { if (req->rq_export->exp_libclient && create_flags & MDS_OPEN_HAS_EA) GOTO(out, result = 0); GOTO(out, result); } /* We didn't find the correct object, so we need to re-create it * via a regular replay. */ if (!(create_flags & MDS_OPEN_CREAT)) { DEBUG_REQ(D_ERROR, req, "OPEN & CREAT not in open replay/by_fid."); GOTO(out, result = -EFAULT); } CDEBUG(D_INFO, "No object(1), continue as regular open.\n"); } else if ((rr->rr_namelen == 0 && !info->mti_cross_ref && create_flags & MDS_OPEN_LOCK) || (create_flags & MDS_OPEN_BY_FID)) { result = mdt_open_by_fid_lock(info, ldlm_rep, lhc); if (result != -ENOENT && !(create_flags & MDS_OPEN_CREAT)) GOTO(out, result); if (unlikely(rr->rr_namelen == 0)) GOTO(out, result = -EINVAL); CDEBUG(D_INFO, "No object(2), continue as regular open.\n"); } if (OBD_FAIL_CHECK(OBD_FAIL_MDS_OPEN_PACK)) GOTO(out, result = err_serious(-ENOMEM)); mdt_set_disposition(info, ldlm_rep, (DISP_IT_EXECD | DISP_LOOKUP_EXECD)); if (info->mti_cross_ref) { /* This is cross-ref open */ mdt_set_disposition(info, ldlm_rep, DISP_LOOKUP_POS); result = mdt_cross_open(info, rr->rr_fid1, ldlm_rep, create_flags); GOTO(out, result); } lh = &info->mti_lh[MDT_LH_PARENT]; mdt_lock_pdo_init(lh, (create_flags & MDS_OPEN_CREAT) ? LCK_PW : LCK_PR, rr->rr_name, rr->rr_namelen); parent = mdt_object_find_lock(info, rr->rr_fid1, lh, MDS_INODELOCK_UPDATE); if (IS_ERR(parent)) GOTO(out, result = PTR_ERR(parent)); /* get and check version of parent */ result = mdt_version_get_check(info, parent, 0); if (result) GOTO(out_parent, result); fid_zero(child_fid); lname = mdt_name(info->mti_env, (char *)rr->rr_name, rr->rr_namelen); result = mdo_lookup(info->mti_env, mdt_object_child(parent), lname, child_fid, &info->mti_spec); LASSERTF(ergo(result == 0, fid_is_sane(child_fid)), "looking for "DFID"/%s, result fid="DFID"\n", PFID(mdt_object_fid(parent)), rr->rr_name, PFID(child_fid)); if (result != 0 && result != -ENOENT && result != -ESTALE) GOTO(out_parent, result); if (result == -ENOENT || result == -ESTALE) { mdt_set_disposition(info, ldlm_rep, DISP_LOOKUP_NEG); if (result == -ESTALE) { /* * -ESTALE means the parent is a dead(unlinked) dir, so * it should return -ENOENT to in accordance with the * original mds implementaion. */ GOTO(out_parent, result = -ENOENT); } if (!(create_flags & MDS_OPEN_CREAT)) GOTO(out_parent, result); *child_fid = *info->mti_rr.rr_fid2; LASSERTF(fid_is_sane(child_fid), "fid="DFID"\n", PFID(child_fid)); /* In the function below, .hs_keycmp resolves to * lu_obj_hop_keycmp() */ /* coverity[overrun-buffer-val] */ child = mdt_object_new(info->mti_env, mdt, child_fid); } else { /* * Check for O_EXCL is moved to the mdt_finish_open(), we need to * return FID back in that case. */ mdt_set_disposition(info, ldlm_rep, DISP_LOOKUP_POS); child = mdt_object_find(info->mti_env, mdt, child_fid); } if (IS_ERR(child)) GOTO(out_parent, result = PTR_ERR(child)); /** check version of child */ rc = mdt_version_get_check(info, child, 1); if (rc) GOTO(out_child, result = rc); mdt_set_capainfo(info, 1, child_fid, BYPASS_CAPA); if (result == -ENOENT) { if (mdt_object_obf(parent)) GOTO(out_child, result = -EPERM); /* save versions in reply */ mdt_version_get_save(info, parent, 0); mdt_version_get_save(info, child, 1); /* version of child will be changed */ info->mti_mos = child; /* Not found and with MDS_OPEN_CREAT: let's create it. */ mdt_set_disposition(info, ldlm_rep, DISP_OPEN_CREATE); /* Let lower layers know what is lock mode on directory. */ 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; result = mdo_create(info->mti_env, mdt_object_child(parent), lname, mdt_object_child(child), &info->mti_spec, &info->mti_attr); if (result == -ERESTART) { mdt_clear_disposition(info, ldlm_rep, DISP_OPEN_CREATE); GOTO(out_child, result); } else { /* XXX: we should call this once, see few lines below */ if (result == 0) result = mdt_attr_get_complex(info, child, ma); if (result != 0) GOTO(out_child, result); } created = 1; } else { /* We have to get attr & lov ea for this object */ result = mdt_attr_get_complex(info, child, ma); /* * The object is on remote node, return its FID for remote open. */ if (result == -EREMOTE) { /* * Check if this lock already was sent to client and * this is resent case. For resent case do not take lock * again, use what is already granted. */ LASSERT(lhc != NULL); if (lustre_handle_is_used(&lhc->mlh_reg_lh)) { struct ldlm_lock *lock; LASSERT(msg_flags & MSG_RESENT); lock = ldlm_handle2lock(&lhc->mlh_reg_lh); if (!lock) { CERROR("Invalid lock handle "LPX64"\n", lhc->mlh_reg_lh.cookie); LBUG(); } LASSERT(fid_res_name_eq(mdt_object_fid(child), &lock->l_resource->lr_name)); LDLM_LOCK_PUT(lock); rc = 0; } else { mdt_lock_handle_init(lhc); mdt_lock_reg_init(lhc, LCK_PR); rc = mdt_object_lock(info, child, lhc, MDS_INODELOCK_LOOKUP, MDT_CROSS_LOCK); } repbody->fid1 = *mdt_object_fid(child); repbody->valid |= (OBD_MD_FLID | OBD_MD_MDS); if (rc != 0) result = rc; GOTO(out_child, result); } } LASSERT(!lustre_handle_is_used(&lhc->mlh_reg_lh)); /* get openlock if this is not replay and if a client requested it */ if (!req_is_replay(req) && create_flags & MDS_OPEN_LOCK) { ldlm_mode_t lm; if (create_flags & FMODE_WRITE) lm = LCK_CW; else if (create_flags & MDS_FMODE_EXEC) lm = LCK_PR; else lm = LCK_CR; mdt_lock_handle_init(lhc); mdt_lock_reg_init(lhc, lm); rc = mdt_object_lock(info, child, lhc, MDS_INODELOCK_LOOKUP | MDS_INODELOCK_OPEN, MDT_CROSS_LOCK); if (rc) { result = rc; GOTO(out_child, result); } else { result = -EREMOTE; mdt_set_disposition(info, ldlm_rep, DISP_OPEN_LOCK); } } /* Try to open it now. */ rc = mdt_finish_open(info, parent, child, create_flags, created, ldlm_rep); if (rc) { result = rc; if (lustre_handle_is_used(&lhc->mlh_reg_lh)) { /* openlock was acquired and mdt_finish_open failed - drop the openlock */ mdt_object_unlock(info, child, lhc, 1); mdt_clear_disposition(info, ldlm_rep, DISP_OPEN_LOCK); } if (created) { ma->ma_need = 0; ma->ma_valid = 0; ma->ma_cookie_size = 0; rc = mdo_unlink(info->mti_env, mdt_object_child(parent), mdt_object_child(child), lname, &info->mti_attr); if (rc != 0) CERROR("Error in cleanup of open\n"); mdt_clear_disposition(info, ldlm_rep, DISP_OPEN_CREATE); } } EXIT; out_child: mdt_object_put(info->mti_env, child); out_parent: mdt_object_unlock_put(info, parent, lh, result || !created); out: if (result && result != -EREMOTE) lustre_msg_set_transno(req->rq_repmsg, 0); return result; } #define MFD_CLOSED(mode) (((mode) & ~(MDS_FMODE_EPOCH | MDS_FMODE_SOM | \ MDS_FMODE_TRUNC)) == MDS_FMODE_CLOSED) static int mdt_mfd_closed(struct mdt_file_data *mfd) { return ((mfd == NULL) || MFD_CLOSED(mfd->mfd_mode)); } int mdt_mfd_close(struct mdt_thread_info *info, struct mdt_file_data *mfd) { struct mdt_object *o = mfd->mfd_object; struct md_object *next = mdt_object_child(o); struct md_attr *ma = &info->mti_attr; int ret = MDT_IOEPOCH_CLOSED; int rc = 0; int mode; ENTRY; mode = mfd->mfd_mode; if ((mode & FMODE_WRITE) || (mode & MDS_FMODE_TRUNC)) { mdt_write_put(o); ret = mdt_ioepoch_close(info, o); } else if (mode & MDS_FMODE_EXEC) { mdt_write_allow(o); } else if (mode & MDS_FMODE_EPOCH) { ret = mdt_ioepoch_close(info, o); } else if (mode & MDS_FMODE_SOM) { ret = mdt_som_au_close(info, o); } /* Update atime on close only. */ if ((mode & MDS_FMODE_EXEC || mode & FMODE_READ || mode & FMODE_WRITE) && (ma->ma_valid & MA_INODE) && (ma->ma_attr.la_valid & LA_ATIME)) { /* Set the atime only. */ ma->ma_valid = MA_INODE; ma->ma_attr.la_valid = LA_ATIME; rc = mo_attr_set(info->mti_env, next, ma); } ma->ma_need |= MA_INODE; ma->ma_valid &= ~MA_INODE; if (!MFD_CLOSED(mode)) rc = mo_close(info->mti_env, next, ma, mode); if (ret == MDT_IOEPOCH_GETATTR || ret == MDT_IOEPOCH_OPENED) { struct mdt_export_data *med; /* The IOepoch is still opened or SOM update is needed. * Put mfd back into the list. */ LASSERT(mdt_conn_flags(info) & OBD_CONNECT_SOM); mdt_mfd_set_mode(mfd, ret == MDT_IOEPOCH_OPENED ? MDS_FMODE_EPOCH : MDS_FMODE_SOM); LASSERT(mdt_info_req(info)); med = &mdt_info_req(info)->rq_export->exp_mdt_data; spin_lock(&med->med_open_lock); cfs_list_add(&mfd->mfd_list, &med->med_open_head); class_handle_hash_back(&mfd->mfd_handle); spin_unlock(&med->med_open_lock); if (ret == MDT_IOEPOCH_OPENED) { ret = 0; } else { ret = -EAGAIN; CDEBUG(D_INODE, "Size-on-MDS attribute update is " "needed on "DFID"\n", PFID(mdt_object_fid(o))); } } else { mdt_mfd_free(mfd); mdt_object_put(info->mti_env, o); } RETURN(rc ? rc : ret); } int mdt_close(struct mdt_thread_info *info) { struct mdt_export_data *med; struct mdt_file_data *mfd; struct mdt_object *o; struct md_attr *ma = &info->mti_attr; struct mdt_body *repbody = NULL; struct ptlrpc_request *req = mdt_info_req(info); int rc, ret = 0; ENTRY; mdt_counter_incr(req, LPROC_MDT_CLOSE); /* Close may come with the Size-on-MDS update. Unpack it. */ rc = mdt_close_unpack(info); if (rc) RETURN(err_serious(rc)); LASSERT(info->mti_ioepoch); req_capsule_set_size(info->mti_pill, &RMF_MDT_MD, RCL_SERVER, info->mti_mdt->mdt_max_mdsize); req_capsule_set_size(info->mti_pill, &RMF_LOGCOOKIES, RCL_SERVER, info->mti_mdt->mdt_max_cookiesize); rc = req_capsule_server_pack(info->mti_pill); if (mdt_check_resent(info, mdt_reconstruct_generic, NULL)) { mdt_client_compatibility(info); if (rc == 0) mdt_fix_reply(info); mdt_exit_ucred(info); RETURN(lustre_msg_get_status(req->rq_repmsg)); } /* Continue to close handle even if we can not pack reply */ if (rc == 0) { repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY); ma->ma_lmm = req_capsule_server_get(info->mti_pill, &RMF_MDT_MD); ma->ma_lmm_size = req_capsule_get_size(info->mti_pill, &RMF_MDT_MD, RCL_SERVER); ma->ma_cookie = req_capsule_server_get(info->mti_pill, &RMF_LOGCOOKIES); ma->ma_cookie_size = req_capsule_get_size(info->mti_pill, &RMF_LOGCOOKIES, RCL_SERVER); ma->ma_need = MA_INODE | MA_LOV | MA_COOKIE; repbody->eadatasize = 0; repbody->aclsize = 0; } else { rc = err_serious(rc); } med = &req->rq_export->exp_mdt_data; spin_lock(&med->med_open_lock); mfd = mdt_handle2mfd(info, &info->mti_ioepoch->handle); if (mdt_mfd_closed(mfd)) { 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); /** not serious error since bug 3633 */ rc = -ESTALE; } else { class_handle_unhash(&mfd->mfd_handle); cfs_list_del_init(&mfd->mfd_list); spin_unlock(&med->med_open_lock); /* Do not lose object before last unlink. */ o = mfd->mfd_object; mdt_object_get(info->mti_env, o); ret = mdt_mfd_close(info, mfd); if (repbody != NULL) rc = mdt_handle_last_unlink(info, o, ma); mdt_empty_transno(info, rc); mdt_object_put(info->mti_env, o); } if (repbody != NULL) { mdt_client_compatibility(info); rc = mdt_fix_reply(info); } mdt_exit_ucred(info); if (OBD_FAIL_CHECK(OBD_FAIL_MDS_CLOSE_PACK)) RETURN(err_serious(-ENOMEM)); if (OBD_FAIL_CHECK_RESET(OBD_FAIL_MDS_CLOSE_NET_REP, OBD_FAIL_MDS_CLOSE_NET_REP)) info->mti_fail_id = OBD_FAIL_MDS_CLOSE_NET_REP; RETURN(rc ? rc : ret); } /** * DONE_WRITING rpc handler. * * As mfd is not kept after replayed CLOSE (see mdt_ioepoch_close_on_replay()), * only those DONE_WRITING rpc will be replayed which really wrote smth on disk, * and got a trasid. Waiting for such DONE_WRITING is not reliable, so just * skip attributes and reconstruct the reply here. */ int mdt_done_writing(struct mdt_thread_info *info) { struct ptlrpc_request *req = mdt_info_req(info); struct mdt_body *repbody = NULL; struct mdt_export_data *med; struct mdt_file_data *mfd; int rc; ENTRY; rc = req_capsule_server_pack(info->mti_pill); if (rc) RETURN(err_serious(rc)); repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY); repbody->eadatasize = 0; repbody->aclsize = 0; /* Done Writing may come with the Size-on-MDS update. Unpack it. */ rc = mdt_close_unpack(info); if (rc) RETURN(err_serious(rc)); if (mdt_check_resent(info, mdt_reconstruct_generic, NULL)) { mdt_exit_ucred(info); RETURN(lustre_msg_get_status(req->rq_repmsg)); } med = &info->mti_exp->exp_mdt_data; 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 done write: fid = "DFID ": cookie = "LPX64" ioepoch = "LPU64"\n", PFID(info->mti_rr.rr_fid1), info->mti_ioepoch->handle.cookie, info->mti_ioepoch->ioepoch); /* If this is a replay, reconstruct the transno. */ if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY) { rc = info->mti_ioepoch->flags & MF_SOM_AU ? -EAGAIN : 0; mdt_empty_transno(info, rc); } else rc = -ESTALE; GOTO(error_ucred, rc); } LASSERT(mfd->mfd_mode == MDS_FMODE_EPOCH || mfd->mfd_mode == MDS_FMODE_TRUNC); class_handle_unhash(&mfd->mfd_handle); cfs_list_del_init(&mfd->mfd_list); spin_unlock(&med->med_open_lock); /* Set EPOCH CLOSE flag if not set by client. */ info->mti_ioepoch->flags |= MF_EPOCH_CLOSE; info->mti_attr.ma_valid = 0; info->mti_attr.ma_lmm_size = info->mti_mdt->mdt_max_mdsize; OBD_ALLOC_LARGE(info->mti_attr.ma_lmm, info->mti_mdt->mdt_max_mdsize); if (info->mti_attr.ma_lmm == NULL) GOTO(error_ucred, rc = -ENOMEM); rc = mdt_mfd_close(info, mfd); OBD_FREE_LARGE(info->mti_attr.ma_lmm, info->mti_mdt->mdt_max_mdsize); mdt_empty_transno(info, rc); error_ucred: mdt_exit_ucred(info); RETURN(rc); }