/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*- * vim:expandtab:shiftwidth=8:tabstop=8: * * linux/mds/mds_reint.c * Lustre Metadata Server (mds) reintegration routines * * Copyright (C) 2002, 2003 Cluster File Systems, Inc. * Author: Peter Braam * Author: Andreas Dilger * Author: Phil Schwan * * This file is part of Lustre, http://www.lustre.org. * * Lustre is free software; you can redistribute it and/or * modify it under the terms of version 2 of the GNU General Public * License as published by the Free Software Foundation. * * Lustre 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 for more details. * * You should have received a copy of the GNU General Public License * along with Lustre; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #ifndef EXPORT_SYMTAB # define EXPORT_SYMTAB #endif #define DEBUG_SUBSYSTEM S_MDS #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "mds_internal.h" struct mds_logcancel_data { struct lov_mds_md *mlcd_lmm; int mlcd_size; int mlcd_cookielen; int mlcd_eadatalen; struct llog_cookie mlcd_cookies[0]; }; static void mds_cancel_cookies_cb(struct obd_device *obd, __u64 transno, void *cb_data, int error) { struct mds_logcancel_data *mlcd = cb_data; struct lov_stripe_md *lsm = NULL; struct llog_ctxt *ctxt; int rc; obd_transno_commit_cb(obd, transno, error); CDEBUG(D_HA, "cancelling %d cookies\n", (int)(mlcd->mlcd_cookielen / sizeof(*mlcd->mlcd_cookies))); rc = obd_unpackmd(obd->u.mds.mds_dt_exp, &lsm, mlcd->mlcd_lmm, mlcd->mlcd_eadatalen); if (rc < 0) { CERROR("bad LSM cancelling %d log cookies: rc %d\n", (int)(mlcd->mlcd_cookielen/sizeof(*mlcd->mlcd_cookies)), rc); } else { ///* XXX 0 normally, SENDNOW for debug */); ctxt = llog_get_context(&obd->obd_llogs, mlcd->mlcd_cookies[0].lgc_subsys + 1); rc = llog_cancel(ctxt, mlcd->mlcd_cookielen / sizeof(*mlcd->mlcd_cookies), mlcd->mlcd_cookies, OBD_LLOG_FL_SENDNOW, lsm); if (rc) CERROR("error cancelling %d log cookies: rc %d\n", (int)(mlcd->mlcd_cookielen / sizeof(*mlcd->mlcd_cookies)), rc); obd_free_memmd(obd->u.mds.mds_dt_exp, &lsm); } OBD_FREE(mlcd, mlcd->mlcd_size); } /* Assumes caller has already pushed us into the kernel context. */ int mds_finish_transno(struct mds_obd *mds, struct inode *inode, void *handle, struct ptlrpc_request *req, int rc, __u32 op_data) { struct mds_export_data *med = &req->rq_export->exp_mds_data; struct obd_device *obd = req->rq_export->exp_obd; struct mds_client_data *mcd = med->med_mcd; int err, log_pri = D_HA; __u64 transno; loff_t off; ENTRY; /* if the export has already been failed, we have no last_rcvd slot */ if (req->rq_export->exp_failed) { CERROR("committing transaction for disconnected client\n"); if (handle) GOTO(out_commit, rc); RETURN(rc); } if (IS_ERR(handle)) RETURN(rc); if (handle == NULL) { /* if we're starting our own xaction, use our own inode */ inode = mds->mds_rcvd_filp->f_dentry->d_inode; handle = fsfilt_start(obd, inode, FSFILT_OP_SETATTR, NULL); if (IS_ERR(handle)) { CERROR("fsfilt_start: %ld\n", PTR_ERR(handle)); RETURN(PTR_ERR(handle)); } } off = med->med_off; transno = req->rq_reqmsg->transno; if (rc != 0) { LASSERTF(transno == 0, "BUG 3934, t"LPU64" rc %d\n", transno, rc); } else if (transno == 0) { spin_lock(&mds->mds_transno_lock); transno = ++mds->mds_last_transno; spin_unlock(&mds->mds_transno_lock); } else { spin_lock(&mds->mds_transno_lock); if (transno > mds->mds_last_transno) mds->mds_last_transno = transno; spin_unlock(&mds->mds_transno_lock); } req->rq_repmsg->transno = req->rq_transno = transno; if (req->rq_reqmsg->opc == MDS_CLOSE) { mcd->mcd_last_close_transno = cpu_to_le64(transno); mcd->mcd_last_close_xid = cpu_to_le64(req->rq_xid); mcd->mcd_last_close_result = cpu_to_le32(rc); mcd->mcd_last_close_data = cpu_to_le32(op_data); } else { mcd->mcd_last_transno = cpu_to_le64(transno); mcd->mcd_last_xid = cpu_to_le64(req->rq_xid); mcd->mcd_last_result = cpu_to_le32(rc); mcd->mcd_last_data = cpu_to_le32(op_data); } fsfilt_add_journal_cb(obd, mds->mds_sb, transno, handle, mds_commit_last_transno_cb, NULL); err = fsfilt_write_record(obd, mds->mds_rcvd_filp, mcd, sizeof(*mcd), &off, 0); if (err) { log_pri = D_ERROR; if (rc == 0) rc = err; } DEBUG_REQ(log_pri, req, "wrote trans #"LPU64" client %s at idx %u: err = %d", transno, mcd->mcd_uuid, med->med_idx, err); err = mds_update_last_fid(obd, handle, 0); if (err) { log_pri = D_ERROR; if (rc == 0) rc = err; } err = mds_dt_write_objids(obd); if (err) { log_pri = D_ERROR; if (rc == 0) rc = err; } CDEBUG(log_pri, "wrote objids: err = %d\n", err); EXIT; out_commit: err = fsfilt_commit(obd, mds->mds_sb, inode, handle, req->rq_export->exp_sync); if (err) { CERROR("error committing transaction: %d\n", err); if (!rc) rc = err; } return rc; } /* this gives the same functionality as the code between * sys_chmod and inode_setattr * chown_common and inode_setattr * utimes and inode_setattr */ #ifndef ATTR_RAW /* Just for the case if we have some clients that know about ATTR_RAW */ #define ATTR_RAW 8192 #endif int mds_fix_attr(struct inode *inode, struct mds_update_record *rec) { time_t now = LTIME_S(CURRENT_TIME); struct iattr *attr = &rec->ur_iattr; unsigned int ia_valid = attr->ia_valid; int error; ENTRY; /* only fix up attrs if the client VFS didn't already */ if (!(ia_valid & ATTR_RAW)) RETURN(0); if (!(ia_valid & ATTR_CTIME_SET)) LTIME_S(attr->ia_ctime) = now; if (!(ia_valid & ATTR_ATIME_SET)) LTIME_S(attr->ia_atime) = now; if (!(ia_valid & ATTR_MTIME_SET)) LTIME_S(attr->ia_mtime) = now; if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) RETURN(-EPERM); /* times */ if ((ia_valid & (ATTR_MTIME|ATTR_ATIME)) == (ATTR_MTIME|ATTR_ATIME)) { if (rec->ur_fsuid != inode->i_uid && (error = ll_permission(inode, MAY_WRITE, NULL)) != 0) RETURN(error); } if (ia_valid & ATTR_SIZE) { if ((error = ll_permission(inode, MAY_WRITE, NULL)) != 0) RETURN(error); } if (ia_valid & ATTR_UID) { /* chown */ error = -EPERM; if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) RETURN(-EPERM); if (attr->ia_uid == (uid_t) -1) attr->ia_uid = inode->i_uid; if (attr->ia_gid == (gid_t) -1) attr->ia_gid = inode->i_gid; attr->ia_mode = inode->i_mode; /* * If the user or group of a non-directory has been * changed by a non-root user, remove the setuid bit. * 19981026 David C Niemi * * Changed this to apply to all users, including root, * to avoid some races. This is the behavior we had in * 2.0. The check for non-root was definitely wrong * for 2.2 anyway, as it should have been using * CAP_FSETID rather than fsuid -- 19990830 SD. */ if ((inode->i_mode & S_ISUID) == S_ISUID && !S_ISDIR(inode->i_mode)) { attr->ia_mode &= ~S_ISUID; attr->ia_valid |= ATTR_MODE; } /* * Likewise, if the user or group of a non-directory * has been changed by a non-root user, remove the * setgid bit UNLESS there is no group execute bit * (this would be a file marked for mandatory * locking). 19981026 David C Niemi * * Removed the fsuid check (see the comment above) -- * 19990830 SD. */ if (((inode->i_mode & (S_ISGID | S_IXGRP)) == (S_ISGID | S_IXGRP)) && !S_ISDIR(inode->i_mode)) { attr->ia_mode &= ~S_ISGID; attr->ia_valid |= ATTR_MODE; } } else if (ia_valid & ATTR_MODE) { int mode = attr->ia_mode; /* chmod */ if (attr->ia_mode == (mode_t) -1) attr->ia_mode = inode->i_mode; attr->ia_mode = (mode & S_IALLUGO) | (inode->i_mode & ~S_IALLUGO); } RETURN(0); } void mds_steal_ack_locks(struct ptlrpc_request *req) { struct obd_export *exp = req->rq_export; char str[PTL_NALFMT_SIZE]; struct list_head *tmp; struct ptlrpc_reply_state *oldrep; struct ptlrpc_service *svc; struct llog_create_locks *lcl; unsigned long flags; int i; /* CAVEAT EMPTOR: spinlock order */ spin_lock_irqsave (&exp->exp_lock, flags); list_for_each (tmp, &exp->exp_outstanding_replies) { oldrep = list_entry(tmp, struct ptlrpc_reply_state,rs_exp_list); if (oldrep->rs_xid != req->rq_xid) continue; if (oldrep->rs_msg->opc != req->rq_reqmsg->opc) CERROR ("Resent req xid "LPX64" has mismatched opc: " "new %d old %d\n", req->rq_xid, req->rq_reqmsg->opc, oldrep->rs_msg->opc); svc = oldrep->rs_srv_ni->sni_service; spin_lock (&svc->srv_lock); list_del_init (&oldrep->rs_exp_list); CWARN("Stealing %d locks from rs %p x"LPD64".t"LPD64 " o%d NID %s\n", oldrep->rs_nlocks, oldrep, oldrep->rs_xid, oldrep->rs_transno, oldrep->rs_msg->opc, ptlrpc_peernid2str(&exp->exp_connection->c_peer, str)); for (i = 0; i < oldrep->rs_nlocks; i++) ptlrpc_save_lock(req, &oldrep->rs_locks[i], oldrep->rs_modes[i]); oldrep->rs_nlocks = 0; lcl = oldrep->rs_llog_locks; oldrep->rs_llog_locks = NULL; if (lcl != NULL) ptlrpc_save_llog_lock(req, lcl); DEBUG_REQ(D_HA, req, "stole locks for"); ptlrpc_schedule_difficult_reply (oldrep); spin_unlock (&svc->srv_lock); spin_unlock_irqrestore (&exp->exp_lock, flags); return; } spin_unlock_irqrestore (&exp->exp_lock, flags); } void mds_req_from_mcd(struct ptlrpc_request *req, struct mds_client_data *mcd) { if (req->rq_reqmsg->opc == MDS_CLOSE) { DEBUG_REQ(D_HA, req, "restoring transno "LPD64"/status %d", mcd->mcd_last_close_transno, mcd->mcd_last_close_result); req->rq_repmsg->transno = req->rq_transno = mcd->mcd_last_close_transno; req->rq_repmsg->status = req->rq_status = mcd->mcd_last_close_result; } else { DEBUG_REQ(D_HA, req, "restoring transno "LPD64"/status %d", mcd->mcd_last_transno, mcd->mcd_last_result); req->rq_repmsg->transno = req->rq_transno = mcd->mcd_last_transno; req->rq_repmsg->status = req->rq_status = mcd->mcd_last_result; } mds_steal_ack_locks(req); } static void reconstruct_reint_setattr(struct mds_update_record *rec, int offset, struct ptlrpc_request *req) { struct mds_export_data *med = &req->rq_export->exp_mds_data; struct mds_body *body; struct dentry *de; mds_req_from_mcd(req, med->med_mcd); de = mds_id2dentry(req2obd(req), rec->ur_id1, NULL); if (IS_ERR(de)) { LASSERT(PTR_ERR(de) == req->rq_status); return; } body = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*body)); mds_pack_inode2body(req2obd(req), body, de->d_inode, 1); /* Don't return OST-specific attributes if we didn't just set them */ if (rec->ur_iattr.ia_valid & ATTR_SIZE) body->valid |= OBD_MD_FLSIZE | OBD_MD_FLBLOCKS; if (rec->ur_iattr.ia_valid & (ATTR_MTIME | ATTR_MTIME_SET)) body->valid |= OBD_MD_FLMTIME; if (rec->ur_iattr.ia_valid & (ATTR_ATIME | ATTR_ATIME_SET)) body->valid |= OBD_MD_FLATIME; l_dput(de); } /* In the raw-setattr case, we lock the child inode. * In the write-back case or if being called from open, the client holds a lock * already. * * We use the ATTR_FROM_OPEN flag to tell these cases apart. */ static int mds_reint_setattr(struct mds_update_record *rec, int offset, struct ptlrpc_request *req, struct lustre_handle *lh) { struct mds_obd *mds = mds_req2mds(req); struct obd_device *obd = req->rq_export->exp_obd; struct mds_export_data *med = &req->rq_export->u.eu_mds_data; struct mds_body *body; struct dentry *de = NULL; struct inode *inode = NULL; struct lustre_handle lockh[2] = {{0}, {0}}; int parent_mode; void *handle = NULL; struct mds_logcancel_data *mlcd = NULL; int rc = 0, cleanup_phase = 0, err; int locked = 0; ENTRY; LASSERT(offset == 1); DEBUG_REQ(D_INODE, req, "setattr "LPU64"/%u %x", id_ino(rec->ur_id1), id_gen(rec->ur_id1), rec->ur_iattr.ia_valid); MDS_CHECK_RESENT(req, reconstruct_reint_setattr(rec, offset, req)); MD_COUNTER_INCREMENT(obd, setattr); if (med->med_remote) { if (rec->ur_iattr.ia_valid & ATTR_GID) { CWARN("Deny chgrp from remote client\n"); GOTO(cleanup, rc = -EPERM); } if (rec->ur_iattr.ia_valid & ATTR_UID) { uid_t uid; uid = mds_idmap_lookup_uid(med->med_idmap, 0, rec->ur_iattr.ia_uid); if (uid == MDS_IDMAP_NOTFOUND) { CWARN("Deny chown to uid %u\n", rec->ur_iattr.ia_uid); GOTO(cleanup, rc = -EPERM); } rec->ur_iattr.ia_uid = uid; } } if (rec->ur_iattr.ia_valid & ATTR_FROM_OPEN) { de = mds_id2dentry(obd, rec->ur_id1, NULL); if (IS_ERR(de)) GOTO(cleanup, rc = PTR_ERR(de)); } else { __u64 lockpart = MDS_INODELOCK_UPDATE; if (rec->ur_iattr.ia_valid & (ATTR_MODE | ATTR_UID | ATTR_GID)) lockpart |= MDS_INODELOCK_LOOKUP; de = mds_id2locked_dentry(obd, rec->ur_id1, NULL, LCK_PW, lockh, &parent_mode, NULL, 0, lockpart); if (IS_ERR(de)) GOTO(cleanup, rc = PTR_ERR(de)); locked = 1; } cleanup_phase = 1; inode = de->d_inode; LASSERT(inode); if ((S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)) && rec->ur_eadata != NULL) down(&inode->i_sem); OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_SETATTR_WRITE, inode->i_sb); handle = fsfilt_start(obd, inode, FSFILT_OP_SETATTR, NULL); if (IS_ERR(handle)) GOTO(cleanup, rc = PTR_ERR(handle)); if (rec->ur_iattr.ia_valid & (ATTR_MTIME | ATTR_CTIME)) CDEBUG(D_INODE, "setting mtime %lu, ctime %lu\n", LTIME_S(rec->ur_iattr.ia_mtime), LTIME_S(rec->ur_iattr.ia_ctime)); rc = mds_fix_attr(inode, rec); if (rc) GOTO(cleanup, rc); if (rec->ur_iattr.ia_valid & ATTR_ATTR_FLAG) /* ioctl */ rc = fsfilt_iocontrol(obd, inode, NULL, EXT3_IOC_SETFLAGS, (long)&rec->ur_iattr.ia_attr_flags); else /* setattr */ rc = fsfilt_setattr(obd, de, handle, &rec->ur_iattr, 0); if (rc == 0) { if (rec->ur_iattr.ia_valid & ATTR_EA) { int flags = (int)rec->ur_iattr.ia_attr_flags; rc = -EOPNOTSUPP; if (inode->i_op && inode->i_op->setxattr) rc = inode->i_op->setxattr(de, rec->ur_eadata, rec->ur_ea2data, rec->ur_ea2datalen, flags); } else if (rec->ur_iattr.ia_valid & ATTR_EA_RM) { rc = -EOPNOTSUPP; if (inode->i_op && inode->i_op->removexattr) rc = inode->i_op->removexattr(de, rec->ur_eadata); } else if ((S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)) && rec->ur_eadata != NULL) { struct lov_stripe_md *lsm = NULL; struct lov_user_md *lum = NULL; rc = ll_permission(inode, MAY_WRITE, NULL); if (rc < 0) GOTO(cleanup, rc); lum = rec->ur_eadata; /* if lmm_stripe_size is -1 delete default stripe from dir */ if (S_ISDIR(inode->i_mode) && lum->lmm_stripe_size == (typeof(lum->lmm_stripe_size))(-1)){ rc = fsfilt_set_md(obd, inode, handle, NULL, 0, EA_LOV); if (rc) GOTO(cleanup, rc); } else { rc = obd_iocontrol(OBD_IOC_LOV_SETSTRIPE, mds->mds_dt_exp, 0, &lsm, rec->ur_eadata); if (rc) GOTO(cleanup, rc); obd_free_memmd(mds->mds_dt_exp, &lsm); rc = fsfilt_set_md(obd, inode, handle, rec->ur_eadata, rec->ur_eadatalen, EA_LOV); if (rc) GOTO(cleanup, rc); } } } body = lustre_msg_buf(req->rq_repmsg, 0, sizeof (*body)); mds_pack_inode2body(obd, body, inode, 1); /* Don't return OST-specific attributes if we didn't just set them */ if (rec->ur_iattr.ia_valid & ATTR_SIZE) body->valid |= OBD_MD_FLSIZE | OBD_MD_FLBLOCKS; if (rec->ur_iattr.ia_valid & (ATTR_MTIME | ATTR_MTIME_SET)) body->valid |= OBD_MD_FLMTIME; if (rec->ur_iattr.ia_valid & (ATTR_ATIME | ATTR_ATIME_SET)) body->valid |= OBD_MD_FLATIME; mds_body_do_reverse_map(med, body); /* The logcookie should be no use anymore, why nobody remove * following code block? */ LASSERT(rec->ur_cookielen == 0); if (rc == 0 && rec->ur_cookielen && !IS_ERR(mds->mds_dt_obd)) { OBD_ALLOC(mlcd, sizeof(*mlcd) + rec->ur_cookielen + rec->ur_eadatalen); if (mlcd) { mlcd->mlcd_size = sizeof(*mlcd) + rec->ur_cookielen + rec->ur_eadatalen; mlcd->mlcd_eadatalen = rec->ur_eadatalen; mlcd->mlcd_cookielen = rec->ur_cookielen; mlcd->mlcd_lmm = (void *)&mlcd->mlcd_cookies + mlcd->mlcd_cookielen; memcpy(&mlcd->mlcd_cookies, rec->ur_logcookies, mlcd->mlcd_cookielen); memcpy(mlcd->mlcd_lmm, rec->ur_eadata, mlcd->mlcd_eadatalen); } else { CERROR("unable to allocate log cancel data\n"); } } EXIT; cleanup: if (mlcd != NULL) fsfilt_add_journal_cb(req->rq_export->exp_obd, mds->mds_sb, 0, handle, mds_cancel_cookies_cb, mlcd); err = mds_finish_transno(mds, inode, handle, req, rc, 0); switch (cleanup_phase) { case 1: if ((S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)) && rec->ur_eadata != NULL) up(&inode->i_sem); l_dput(de); if (locked) { #ifdef S_PDIROPS if (lockh[1].cookie != 0) ldlm_lock_decref(lockh + 1, parent_mode); #endif if (rc) { ldlm_lock_decref(lockh, LCK_PW); } else { ptlrpc_save_lock (req, lockh, LCK_PW); } } case 0: break; default: LBUG(); } if (err && !rc) rc = err; req->rq_status = rc; return 0; } static void reconstruct_reint_create(struct mds_update_record *rec, int offset, struct ptlrpc_request *req) { struct mds_export_data *med = &req->rq_export->exp_mds_data; struct dentry *parent, *child; struct mds_body *body; ENTRY; mds_req_from_mcd(req, med->med_mcd); if (req->rq_status) { EXIT; return; } parent = mds_id2dentry(req2obd(req), rec->ur_id1, NULL); LASSERT(!IS_ERR(parent)); child = ll_lookup_one_len(rec->ur_name, parent, rec->ur_namelen - 1); LASSERT(!IS_ERR(child)); if ((child->d_flags & DCACHE_CROSS_REF)) { LASSERTF(child->d_inode == NULL, "BUG 3869\n"); body = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*body)); mds_pack_dentry2body(req2obd(req), body, child, 1); } else if (child->d_inode == NULL) { DEBUG_REQ(D_ERROR, req, "parent "DLID4" name %s mode %o", OLID4(rec->ur_id1), rec->ur_name, rec->ur_mode); LASSERTF(child->d_inode != NULL, "BUG 3869\n"); } else { body = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*body)); mds_pack_inode2body(req2obd(req), body, child->d_inode, 1); } l_dput(parent); l_dput(child); EXIT; } static int mds_get_default_acl(struct inode *dir, void **pacl) { struct dentry de = { .d_inode = dir }; int size, size2; LASSERT(S_ISDIR(dir->i_mode)); if (!dir->i_op->getxattr) return 0; size = dir->i_op->getxattr(&de, XATTR_NAME_ACL_DEFAULT, NULL, 0); if (size == 0 || size == -ENODATA || size == -EOPNOTSUPP) return 0; else if (size < 0) return size; OBD_ALLOC(*pacl, size); if (!*pacl) return -ENOMEM; size2 = dir->i_op->getxattr(&de, XATTR_NAME_ACL_DEFAULT, *pacl, size); if (size2 != size) { /* since we already locked the dir, it should not change * between the 2 getxattr calls */ CERROR("2'nd getxattr got %d, expect %d\n", size2, size); OBD_FREE(*pacl, size); return -EIO; } return size; } static int mds_reint_create(struct mds_update_record *rec, int offset, struct ptlrpc_request *req, struct lustre_handle *lh) { struct dentry *dparent = NULL; struct mds_obd *mds = mds_req2mds(req); struct obd_device *obd = req->rq_export->exp_obd; struct dentry *dchild = NULL; struct inode *dir = NULL; void *handle = NULL; struct lustre_handle lockh[2] = {{0}, {0}}; int parent_mode; int rc = 0, err, type = rec->ur_mode & S_IFMT, cleanup_phase = 0; int created = 0; struct dentry_params dp; struct mea *mea = NULL; int mea_size; ENTRY; LASSERT(offset == 1); LASSERT(!strcmp(req->rq_export->exp_obd->obd_type->typ_name, LUSTRE_MDS_NAME)); DEBUG_REQ(D_INODE, req, "parent "LPU64"/%u name %s mode %o", id_ino(rec->ur_id1), id_gen(rec->ur_id1), rec->ur_name, rec->ur_mode); MDS_CHECK_RESENT(req, reconstruct_reint_create(rec, offset, req)); if (OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_CREATE)) GOTO(cleanup, rc = -ESTALE); dparent = mds_id2locked_dentry(obd, rec->ur_id1, NULL, LCK_PW, lockh, &parent_mode, rec->ur_name, rec->ur_namelen - 1, MDS_INODELOCK_UPDATE); if (IS_ERR(dparent)) { rc = PTR_ERR(dparent); CERROR("parent lookup error %d\n", rc); GOTO(cleanup, rc); } cleanup_phase = 1; /* locked parent dentry */ dir = dparent->d_inode; LASSERT(dir); ldlm_lock_dump_handle(D_OTHER, lockh); /* try to retrieve MEA data for this dir */ rc = mds_md_get_attr(obd, dparent->d_inode, &mea, &mea_size); if (rc) GOTO(cleanup, rc); if (mea != NULL) { /* * dir is already splitted, check is requested filename should * live at this MDS or at another one. */ int i = mea_name2idx(mea, rec->ur_name, rec->ur_namelen - 1); if (mea->mea_master != id_group(&mea->mea_ids[i])) { CDEBUG(D_OTHER, "inapropriate MDS(%d) for %lu/%u:%s." " should be %lu(%d)\n", mea->mea_master, dparent->d_inode->i_ino, dparent->d_inode->i_generation, rec->ur_name, (unsigned long)id_group(&mea->mea_ids[i]), i); GOTO(cleanup, rc = -ERESTART); } } dchild = ll_lookup_one_len(rec->ur_name, dparent, rec->ur_namelen - 1); if (IS_ERR(dchild)) { rc = PTR_ERR(dchild); CERROR("Can't find "DLID4"/%s, error %d\n", OLID4(rec->ur_id1), rec->ur_name, rc); GOTO(cleanup, rc); } cleanup_phase = 2; /* child dentry */ OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_CREATE_WRITE, dir->i_sb); if (type == S_IFREG || type == S_IFDIR) { rc = mds_try_to_split_dir(obd, dparent, &mea, 0, parent_mode); CDEBUG(D_OTHER, "%s: splitted %lu/%u - %d/%d\n", obd->obd_name, dparent->d_inode->i_ino, dparent->d_inode->i_generation, rc, parent_mode); if (rc > 0) { /* dir got splitted */ GOTO(cleanup, rc = -ERESTART); } else if (rc < 0) { /* error happened during spitting. */ GOTO(cleanup, rc); } } if (dir->i_mode & S_ISGID) { if (S_ISDIR(rec->ur_mode)) rec->ur_mode |= S_ISGID; } /* * here inode number should be used only in the case of replaying. It is * needed to check if object already created in the case of creating * remote inode. */ dchild->d_fsdata = (void *)&dp; dp.p_inum = (unsigned long)id_ino(rec->ur_id2); dp.p_ptr = req; switch (type) { case S_IFREG: { handle = fsfilt_start(obd, dir, FSFILT_OP_CREATE, NULL); if (IS_ERR(handle)) GOTO(cleanup, rc = PTR_ERR(handle)); rc = ll_vfs_create(dir, dchild, rec->ur_mode, NULL); if (rc == 0 && rec->ur_eadata) { /*for CMOBD to set lov md info when cmobd reint create*/ CDEBUG(D_INFO, "set lsm %p, len %d to inode %lu \n", rec->ur_eadata, rec->ur_eadatalen, dchild->d_inode->i_ino); fsfilt_set_md(obd, dchild->d_inode, handle, rec->ur_eadata, rec->ur_eadatalen, EA_LOV); } EXIT; break; } case S_IFDIR: { int i, nstripes = 0; /* * as Peter asked, mkdir() should distribute new directories * over the whole cluster in order to distribute namespace * processing load. first, we calculate which MDS to use to put * new directory's inode in. */ i = mds_choose_mdsnum(obd, rec->ur_name, rec->ur_namelen - 1, rec->ur_flags, &req->rq_peer, dir); if (i == mds->mds_num) { /* inode will be created locally */ handle = fsfilt_start(obd, dir, FSFILT_OP_MKDIR, NULL); if (IS_ERR(handle)) GOTO(cleanup, rc = PTR_ERR(handle)); rc = vfs_mkdir(dir, dchild, rec->ur_mode); if (rc) { CDEBUG(D_OTHER, "Can't create dir \"%s\", rc = %d\n", dchild->d_name.name, rc); GOTO(cleanup, rc); } down(&dchild->d_inode->i_sem); if (dp.p_inum) { rc = mds_update_inode_sid(obd, dchild->d_inode, handle, rec->ur_id2); if (rc) { CERROR("mds_update_inode_sid() failed, inode %lu, " "rc %d\n", dchild->d_inode->i_ino, rc); } /* * make sure, that fid is up-to-date. */ mds_set_last_fid(obd, id_fid(rec->ur_id2)); } else { rc = mds_alloc_inode_sid(obd, dchild->d_inode, handle, NULL); if (rc) { CERROR("mds_alloc_inode_sid() failed, inode %lu, " "rc %d\n", dchild->d_inode->i_ino, rc); } } up(&dchild->d_inode->i_sem); if (rc) GOTO(cleanup, rc); if (rec->ur_eadata) nstripes = *(u16 *)rec->ur_eadata; if (rc == 0 && nstripes) { /* * we pass LCK_EX to split routine to signal, * that we have exclusive access to the * directory. Simple because nobody knows it * already exists -bzzz */ rc = mds_try_to_split_dir(obd, dchild, NULL, nstripes, LCK_EX); if (rc > 0) { /* dir got splitted */ rc = 0; } else if (rc < 0) { /* an error occured during * splitting. */ GOTO(cleanup, rc); } } } else if (!DENTRY_VALID(dchild)) { /* inode will be created on another MDS */ struct obdo *oa = NULL; struct mds_body *body; void *acl = NULL; int acl_size; /* first, create that inode */ oa = obdo_alloc(); if (!oa) GOTO(cleanup, rc = -ENOMEM); oa->o_mds = i; oa->o_easize = 0; if (rec->ur_eadata) { /* user asks for creating splitted dir */ oa->o_easize = *((u16 *) rec->ur_eadata); } obdo_from_inode(oa, dir, OBD_MD_FLATIME | OBD_MD_FLMTIME | OBD_MD_FLCTIME); /* adjust the uid/gid/mode bits */ oa->o_mode = rec->ur_mode; oa->o_uid = current->fsuid; oa->o_gid = (dir->i_mode & S_ISGID) ? dir->i_gid : current->fsgid; oa->o_valid |= OBD_MD_FLTYPE|OBD_MD_FLUID|OBD_MD_FLGID; CDEBUG(D_OTHER, "%s: create dir on MDS %u\n", obd->obd_name, i); if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY) { /* * here inode number and generation are * important, as this is replay request and we * need them to check if such an object is * already created. */ CDEBUG(D_HA, "%s: replay dir creation %*s -> %u/%u\n", obd->obd_name, rec->ur_namelen - 1, rec->ur_name, (unsigned)id_ino(rec->ur_id2), (unsigned)id_gen(rec->ur_id2)); oa->o_id = id_ino(rec->ur_id2); oa->o_fid = id_fid(rec->ur_id2); oa->o_generation = id_gen(rec->ur_id2); oa->o_flags |= OBD_FL_RECREATE_OBJS; LASSERT(oa->o_fid != 0); } /* obtain default ACL */ acl_size = mds_get_default_acl(dir, &acl); if (acl_size < 0) { obdo_free(oa); GOTO(cleanup, rc = -ENOMEM); } /* * before obd_create() is called, o_fid is not known if * this is not recovery of cause. */ rc = obd_create(mds->mds_md_exp, oa, acl, acl_size, NULL, NULL); if (acl) OBD_FREE(acl, acl_size); if (rc) { CERROR("can't create remote inode: %d\n", rc); DEBUG_REQ(D_ERROR, req, "parent "LPU64"/%u name %s mode %o", id_ino(rec->ur_id1), id_gen(rec->ur_id1), rec->ur_name, rec->ur_mode); obdo_free(oa); GOTO(cleanup, rc); } LASSERT(oa->o_fid != 0); /* now, add new dir entry for it */ handle = fsfilt_start(obd, dir, FSFILT_OP_MKDIR, NULL); if (IS_ERR(handle)) { obdo_free(oa); GOTO(cleanup, rc = PTR_ERR(handle)); } /* creating local dentry for remote inode. */ rc = fsfilt_add_dir_entry(obd, dparent, rec->ur_name, rec->ur_namelen - 1, oa->o_id, oa->o_generation, i, oa->o_fid); if (rc) { CERROR("Can't create local entry %*s for " "remote inode.\n", rec->ur_namelen - 1, rec->ur_name); GOTO(cleanup, rc); } /* fill reply */ body = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*body)); body->valid |= OBD_MD_FLID | OBD_MD_MDS | OBD_MD_FID; obdo2id(&body->id1, oa); obdo_free(oa); } else { /* requested name exists in the directory */ rc = -EEXIST; } EXIT; break; } case S_IFLNK:{ handle = fsfilt_start(obd, dir, FSFILT_OP_SYMLINK, NULL); if (IS_ERR(handle)) GOTO(cleanup, rc = PTR_ERR(handle)); if (rec->ur_tgt == NULL) /* no target supplied */ rc = -EINVAL; /* -EPROTO? */ else rc = ll_vfs_symlink(dir, dchild, rec->ur_tgt, S_IALLUGO); EXIT; break; } case S_IFCHR: case S_IFBLK: case S_IFIFO: case S_IFSOCK:{ int rdev = rec->ur_rdev; handle = fsfilt_start(obd, dir, FSFILT_OP_MKNOD, NULL); if (IS_ERR(handle)) GOTO(cleanup, (handle = NULL, rc = PTR_ERR(handle))); rc = vfs_mknod(dir, dchild, rec->ur_mode, rdev); EXIT; break; } default: CERROR("bad file type %o creating %s\n", type, rec->ur_name); dchild->d_fsdata = NULL; GOTO(cleanup, rc = -EINVAL); } /* In case we stored the desired inum in here, we want to clean up. */ if (dchild->d_fsdata == (void *)(unsigned long)id_ino(rec->ur_id2)) dchild->d_fsdata = NULL; if (rc) { CDEBUG(D_INODE, "error during create: %d\n", rc); GOTO(cleanup, rc); } else if (dchild->d_inode) { struct mds_export_data *med = &req->rq_export->u.eu_mds_data; struct iattr iattr; struct mds_body *body; struct inode *inode = dchild->d_inode; created = 1; iattr.ia_uid = rec->ur_fsuid; LTIME_S(iattr.ia_atime) = rec->ur_time; LTIME_S(iattr.ia_ctime) = rec->ur_time; LTIME_S(iattr.ia_mtime) = rec->ur_time; if (dir->i_mode & S_ISGID) iattr.ia_gid = dir->i_gid; else iattr.ia_gid = rec->ur_fsgid; iattr.ia_valid = ATTR_UID | ATTR_GID | ATTR_ATIME | ATTR_MTIME | ATTR_CTIME; if (id_ino(rec->ur_id2)) { LASSERT(id_ino(rec->ur_id2) == inode->i_ino); inode->i_generation = id_gen(rec->ur_id2); if (type != S_IFDIR) { down(&inode->i_sem); rc = mds_update_inode_sid(obd, inode, handle, rec->ur_id2); up(&inode->i_sem); if (rc) { CERROR("Can't update inode self id, " "rc = %d.\n", rc); } /* * make sure, that fid is up-to-date. */ mds_set_last_fid(obd, id_fid(rec->ur_id2)); } /* dirtied and committed by the upcoming setattr. */ CDEBUG(D_INODE, "recreated ino %lu with gen %u\n", inode->i_ino, inode->i_generation); } else { struct lustre_handle child_ino_lockh; CDEBUG(D_INODE, "created ino %lu with gen %x\n", inode->i_ino, inode->i_generation); if (type != S_IFDIR) { /* * allocate new id for @inode if it is not dir, * because for dir it was already done. */ down(&inode->i_sem); rc = mds_alloc_inode_sid(obd, inode, handle, NULL); up(&inode->i_sem); if (rc) { CERROR("mds_alloc_inode_sid() failed, " "inode %lu, rc %d\n", inode->i_ino, rc); } } if (rc == 0) { /* * the inode we were allocated may have just * been freed by an unlink operation. We take * this lock to synchronize against the matching * reply-ack-lock taken in unlink, to avoid * replay problems if this reply makes it out to * the client but the unlink's does not. See * bug 2029 for more detail. */ rc = mds_lock_new_child(obd, inode, &child_ino_lockh); if (rc != ELDLM_OK) { CERROR("error locking for unlink/create sync: " "%d\n", rc); } else { ldlm_lock_decref(&child_ino_lockh, LCK_EX); } } } rc = fsfilt_setattr(obd, dchild, handle, &iattr, 0); if (rc) CERROR("error on child setattr: rc = %d\n", rc); iattr.ia_valid = ATTR_MTIME | ATTR_CTIME; rc = fsfilt_setattr(obd, dparent, handle, &iattr, 0); if (rc) CERROR("error on parent setattr: rc = %d\n", rc); else MD_COUNTER_INCREMENT(obd, create); /* take care of default stripe inheritance */ if (type == S_IFDIR) { struct lov_mds_md lmm; int lmm_size = sizeof(lmm); rc = mds_get_md(obd, dir, &lmm, &lmm_size, 1, 0); if (rc > 0) { down(&inode->i_sem); rc = fsfilt_set_md(obd, inode, handle, &lmm, lmm_size, EA_LOV); up(&inode->i_sem); } if (rc) { CERROR("error on copy stripe info: rc = %d\n", rc); rc = 0; } } body = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*body)); mds_pack_inode2body(obd, body, inode, 1); mds_body_do_reverse_map(med, body); } EXIT; cleanup: err = mds_finish_transno(mds, dir, handle, req, rc, 0); if (rc && created) { /* Destroy the file we just created. This should not need extra * journal credits, as we have already modified all of the * blocks needed in order to create the file in the first * place. */ switch (type) { case S_IFDIR: err = vfs_rmdir(dir, dchild); if (err) CERROR("rmdir in error path: %d\n", err); break; default: err = vfs_unlink(dir, dchild); if (err) CERROR("unlink in error path: %d\n", err); break; } } else { rc = err; } switch (cleanup_phase) { case 2: /* child dentry */ l_dput(dchild); case 1: /* locked parent dentry */ #ifdef S_PDIROPS if (lockh[1].cookie != 0) ldlm_lock_decref(lockh + 1, parent_mode); #endif if (rc) { ldlm_lock_decref(lockh, LCK_PW); } else { ptlrpc_save_lock(req, lockh, LCK_PW); } l_dput(dparent); case 0: break; default: CERROR("invalid cleanup_phase %d\n", cleanup_phase); LBUG(); } if (mea) OBD_FREE(mea, mea_size); req->rq_status = rc; return 0; } static inline int res_gt(struct ldlm_res_id *res1, struct ldlm_res_id *res2, ldlm_policy_data_t *p1, ldlm_policy_data_t *p2) { int i; for (i = 0; i < RES_NAME_SIZE; i++) { /* * this is needed to make zeroed res_id entries to be put at the * end of list in *ordered_locks() . */ if (res1->name[i] == 0 && res2->name[i] != 0) return 1; if (res2->name[i] == 0 && res1->name[i] != 0) return 0; if (res1->name[i] > res2->name[i]) return 1; if (res1->name[i] < res2->name[i]) return 0; } if (!p1 || !p2) return 0; if (memcmp(p1, p2, sizeof(*p1)) < 0) return 1; return 0; } /* This function doesn't use ldlm_match_or_enqueue because we're always called * with EX or PW locks, and the MDS is no longer allowed to match write locks, * because they take the place of local semaphores. * * One or two locks are taken in numerical order. A res_id->name[0] of 0 means * no lock is taken for that res_id. Must be at least one non-zero res_id. */ int enqueue_ordered_locks(struct obd_device *obd, struct ldlm_res_id *p1_res_id, struct lustre_handle *p1_lockh, int p1_lock_mode, ldlm_policy_data_t *p1_policy, struct ldlm_res_id *p2_res_id, struct lustre_handle *p2_lockh, int p2_lock_mode, ldlm_policy_data_t *p2_policy) { int lock_modes[2] = { p1_lock_mode, p2_lock_mode }; struct ldlm_res_id *res_id[2] = { p1_res_id, p2_res_id }; struct lustre_handle *handles[2] = { p1_lockh, p2_lockh }; ldlm_policy_data_t *policies[2] = { p1_policy, p2_policy }; int rc, flags; ENTRY; LASSERT(p1_res_id != NULL && p2_res_id != NULL); CDEBUG(D_INFO, "locks before: "LPU64"/"LPU64"\n", res_id[0]->name[0], res_id[1]->name[0]); if (res_gt(p1_res_id, p2_res_id, p1_policy, p2_policy)) { handles[1] = p1_lockh; handles[0] = p2_lockh; res_id[1] = p1_res_id; res_id[0] = p2_res_id; lock_modes[1] = p1_lock_mode; lock_modes[0] = p2_lock_mode; policies[1] = p1_policy; policies[0] = p2_policy; } CDEBUG(D_DLMTRACE, "lock order: "LPU64"/"LPU64"\n", res_id[0]->name[0], res_id[1]->name[0]); flags = LDLM_FL_LOCAL_ONLY; rc = ldlm_cli_enqueue(NULL, NULL, obd->obd_namespace, *res_id[0], LDLM_IBITS, policies[0], lock_modes[0], &flags, mds_blocking_ast, ldlm_completion_ast, NULL, NULL, NULL, 0, NULL, handles[0]); if (rc != ELDLM_OK) RETURN(-EIO); ldlm_lock_dump_handle(D_OTHER, handles[0]); if (!memcmp(res_id[0], res_id[1], sizeof(*res_id[0])) && (policies[0]->l_inodebits.bits & policies[1]->l_inodebits.bits)) { memcpy(handles[1], handles[0], sizeof(*(handles[1]))); ldlm_lock_addref(handles[1], lock_modes[1]); } else if (res_id[1]->name[0] != 0) { flags = LDLM_FL_LOCAL_ONLY; rc = ldlm_cli_enqueue(NULL, NULL, obd->obd_namespace, *res_id[1], LDLM_IBITS, policies[1], lock_modes[1], &flags, mds_blocking_ast, ldlm_completion_ast, NULL, NULL, NULL, 0, NULL, handles[1]); if (rc != ELDLM_OK) { ldlm_lock_decref(handles[0], lock_modes[0]); RETURN(-EIO); } ldlm_lock_dump_handle(D_OTHER, handles[1]); } RETURN(0); } int enqueue_4ordered_locks(struct obd_device *obd,struct ldlm_res_id *p1_res_id, struct lustre_handle *p1_lockh, int p1_lock_mode, ldlm_policy_data_t *p1_policy, struct ldlm_res_id *p2_res_id, struct lustre_handle *p2_lockh, int p2_lock_mode, ldlm_policy_data_t *p2_policy, struct ldlm_res_id *c1_res_id, struct lustre_handle *c1_lockh, int c1_lock_mode, ldlm_policy_data_t *c1_policy, struct ldlm_res_id *c2_res_id, struct lustre_handle *c2_lockh, int c2_lock_mode, ldlm_policy_data_t *c2_policy) { struct ldlm_res_id *res_id[5] = { p1_res_id, p2_res_id, c1_res_id, c2_res_id }; struct lustre_handle *dlm_handles[5] = { p1_lockh, p2_lockh, c1_lockh, c2_lockh }; int lock_modes[5] = { p1_lock_mode, p2_lock_mode, c1_lock_mode, c2_lock_mode }; ldlm_policy_data_t *policies[5] = { p1_policy, p2_policy, c1_policy, c2_policy}; int rc, i, j, sorted, flags; ENTRY; CDEBUG(D_DLMTRACE, "locks before: "LPU64"/"LPU64"/"LPU64"/"LPU64"\n", res_id[0]->name[0], res_id[1]->name[0], res_id[2]->name[0], res_id[3]->name[0]); /* * simple insertion sort - we have at most 4 elements. Note, that zeroed * res_id should be at the end of list after sorting is finished. */ for (i = 1; i < 4; i++) { j = i - 1; dlm_handles[4] = dlm_handles[i]; res_id[4] = res_id[i]; lock_modes[4] = lock_modes[i]; policies[4] = policies[i]; sorted = 0; do { if (res_gt(res_id[j], res_id[4], policies[j], policies[4])) { dlm_handles[j + 1] = dlm_handles[j]; res_id[j + 1] = res_id[j]; lock_modes[j + 1] = lock_modes[j]; policies[j + 1] = policies[j]; j--; } else { sorted = 1; } } while (j >= 0 && !sorted); dlm_handles[j + 1] = dlm_handles[4]; res_id[j + 1] = res_id[4]; lock_modes[j + 1] = lock_modes[4]; policies[j + 1] = policies[4]; } CDEBUG(D_DLMTRACE, "lock order: "LPU64"/"LPU64"/"LPU64"/"LPU64"\n", res_id[0]->name[0], res_id[1]->name[0], res_id[2]->name[0], res_id[3]->name[0]); /* XXX we could send ASTs on all these locks first before blocking? */ for (i = 0; i < 4; i++) { flags = 0; /* * nevertheless zeroed res_ids should be at the end of list, and * could use break here, I think, that it is more correctly for * clear understanding of code to have continue here, as it * clearly means, that zeroed res_id should be skipped and does * not mean, that if we meet zeroed res_id we should stop * locking loop. */ if (res_id[i]->name[0] == 0) continue; if (i != 0 && !memcmp(res_id[i], res_id[i-1], sizeof(*res_id[i])) && (policies[i]->l_inodebits.bits & policies[i-1]->l_inodebits.bits) ) { memcpy(dlm_handles[i], dlm_handles[i-1], sizeof(*(dlm_handles[i]))); ldlm_lock_addref(dlm_handles[i], lock_modes[i]); } else { rc = ldlm_cli_enqueue(NULL, NULL, obd->obd_namespace, *res_id[i], LDLM_IBITS, policies[i], lock_modes[i], &flags, mds_blocking_ast, ldlm_completion_ast, NULL, NULL, NULL, 0, NULL, dlm_handles[i]); if (rc != ELDLM_OK) GOTO(out_err, rc = -EIO); ldlm_lock_dump_handle(D_OTHER, dlm_handles[i]); } } RETURN(0); out_err: while (i-- > 0) ldlm_lock_decref(dlm_handles[i], lock_modes[i]); return rc; } /* In the unlikely case that the child changed while we were waiting * on the lock, we need to drop the lock on the old child and either: * - if the child has a lower resource name, then we have to also * drop the parent lock and regain the locks in the right order * - in the rename case, if the child has a lower resource name than one of * the other parent/child resources (maxres) we also need to reget the locks * - if the child has a higher resource name (this is the common case) * we can just get the lock on the new child (still in lock order) * * Returns 0 if the child did not change or if it changed but could be locked. * Returns 1 if the child changed and we need to re-lock (no locks held). * Returns -ve error with a valid dchild (no locks held). */ static int mds_verify_child(struct obd_device *obd, struct ldlm_res_id *parent_res_id, struct lustre_handle *parent_lockh, struct dentry *dparent, int parent_mode, struct ldlm_res_id *child_res_id, struct lustre_handle *child_lockh, struct dentry **dchildp, int child_mode, ldlm_policy_data_t *child_policy, const char *name, int namelen, struct ldlm_res_id *maxres, unsigned long child_ino, __u32 child_gen) { struct lustre_id sid; struct dentry *vchild, *dchild = *dchildp; int rc = 0, cleanup_phase = 2; /* parent, child locks */ ENTRY; vchild = ll_lookup_one_len(name, dparent, namelen - 1); if (IS_ERR(vchild)) GOTO(cleanup, rc = PTR_ERR(vchild)); if ((vchild->d_flags & DCACHE_CROSS_REF)) { if (child_gen == vchild->d_generation && child_ino == vchild->d_inum) { if (dchild) l_dput(dchild); *dchildp = vchild; RETURN(0); } goto changed; } if (likely((vchild->d_inode == NULL && child_res_id->name[0] == 0) || (vchild->d_inode != NULL && child_gen == vchild->d_inode->i_generation && child_ino == vchild->d_inode->i_ino))) { if (dchild) l_dput(dchild); *dchildp = vchild; RETURN(0); } changed: CDEBUG(D_DLMTRACE, "child inode changed: %p != %p (%lu != "LPU64")\n", vchild->d_inode, dchild ? dchild->d_inode : 0, vchild->d_inode ? vchild->d_inode->i_ino : 0, child_res_id->name[0]); if (child_res_id->name[0] != 0) ldlm_lock_decref(child_lockh, child_mode); if (dchild) l_dput(dchild); cleanup_phase = 1; /* parent lock only */ *dchildp = dchild = vchild; if (dchild->d_inode || (dchild->d_flags & DCACHE_CROSS_REF)) { int flags = 0; if (dchild->d_inode) { down(&dchild->d_inode->i_sem); rc = mds_read_inode_sid(obd, dchild->d_inode, &sid); up(&dchild->d_inode->i_sem); if (rc) { CERROR("Can't read inode self id, inode %lu," " rc %d\n", dchild->d_inode->i_ino, rc); GOTO(cleanup, rc); } child_res_id->name[0] = id_fid(&sid); child_res_id->name[1] = id_group(&sid); } else { child_res_id->name[0] = dchild->d_fid; child_res_id->name[1] = dchild->d_mdsnum; } if (res_gt(parent_res_id, child_res_id, NULL, NULL) || res_gt(maxres, child_res_id, NULL, NULL)) { CDEBUG(D_DLMTRACE, "relock "LPU64"<("LPU64"|"LPU64")\n", child_res_id->name[0], parent_res_id->name[0], maxres->name[0]); GOTO(cleanup, rc = 1); } rc = ldlm_cli_enqueue(NULL, NULL, obd->obd_namespace, *child_res_id, LDLM_IBITS, child_policy, child_mode, &flags, mds_blocking_ast, ldlm_completion_ast, NULL, NULL, NULL, 0, NULL, child_lockh); if (rc != ELDLM_OK) GOTO(cleanup, rc = -EIO); } else { memset(child_res_id, 0, sizeof(*child_res_id)); } EXIT; cleanup: if (rc) { switch(cleanup_phase) { case 2: if (child_res_id->name[0] != 0) ldlm_lock_decref(child_lockh, child_mode); case 1: ldlm_lock_decref(parent_lockh, parent_mode); } } return rc; } int mds_get_parent_child_locked(struct obd_device *obd, struct mds_obd *mds, struct lustre_id *id, struct lustre_handle *parent_lockh, struct dentry **dparentp, int parent_mode, __u64 parent_lockpart, int *update_mode, char *name, int namelen, struct lustre_handle *child_lockh, struct dentry **dchildp, int child_mode, __u64 child_lockpart) { ldlm_policy_data_t parent_policy = {.l_inodebits = { parent_lockpart }}; ldlm_policy_data_t child_policy = {.l_inodebits = { child_lockpart }}; struct ldlm_res_id parent_res_id = { .name = {0} }; struct ldlm_res_id child_res_id = { .name = {0} }; unsigned long child_ino = 0; __u32 child_gen = 0; int rc = 0, cleanup_phase = 0; struct lustre_id sid; struct inode *inode; ENTRY; /* Step 1: Lookup parent */ *dparentp = mds_id2dentry(obd, id, NULL); if (IS_ERR(*dparentp)) { rc = PTR_ERR(*dparentp); *dparentp = NULL; RETURN(rc); } CDEBUG(D_INODE, "parent ino %lu, name %s\n", (*dparentp)->d_inode->i_ino, name); parent_res_id.name[0] = id_fid(id); parent_res_id.name[1] = id_group(id); #ifdef S_PDIROPS parent_lockh[1].cookie = 0; if (name && IS_PDIROPS((*dparentp)->d_inode)) { struct ldlm_res_id res_id = { .name = {0} }; ldlm_policy_data_t policy; int flags = 0; *update_mode = mds_lock_mode_for_dir(obd, *dparentp, parent_mode); if (*update_mode) { res_id.name[0] = id_fid(id); res_id.name[1] = id_group(id); policy.l_inodebits.bits = MDS_INODELOCK_UPDATE; rc = ldlm_cli_enqueue(NULL, NULL, obd->obd_namespace, res_id, LDLM_IBITS, &policy, *update_mode, &flags, mds_blocking_ast, ldlm_completion_ast, NULL, NULL, NULL, 0, NULL, parent_lockh + 1); if (rc != ELDLM_OK) RETURN(-ENOLCK); } parent_res_id.name[2] = full_name_hash((unsigned char *)name, namelen - 1); CDEBUG(D_INFO, "take lock on %lu:%lu:"LPX64"\n", (unsigned long)id_fid(id), (unsigned long)id_group(id), parent_res_id.name[2]); } #endif cleanup_phase = 1; /* parent dentry */ /* Step 2: Lookup child (without DLM lock, to get resource name) */ *dchildp = ll_lookup_one_len(name, *dparentp, namelen - 1); if (IS_ERR(*dchildp)) { rc = PTR_ERR(*dchildp); CDEBUG(D_INODE, "child lookup error %d\n", rc); GOTO(cleanup, rc); } if ((*dchildp)->d_flags & DCACHE_CROSS_REF) { /* * inode lives on another MDS: return * fid/mdsnum and LOOKUP * lock. Drop possible UPDATE lock! */ child_policy.l_inodebits.bits &= ~MDS_INODELOCK_UPDATE; child_policy.l_inodebits.bits |= MDS_INODELOCK_LOOKUP; child_res_id.name[0] = (*dchildp)->d_fid; child_res_id.name[1] = (*dchildp)->d_mdsnum; child_ino = (*dchildp)->d_inum; child_gen = (*dchildp)->d_generation; goto retry_locks; } inode = (*dchildp)->d_inode; if (inode != NULL) inode = igrab(inode); if (inode == NULL) goto retry_locks; down(&inode->i_sem); rc = mds_read_inode_sid(obd, inode, &sid); up(&inode->i_sem); if (rc) { CERROR("Can't read inode self id, inode %lu, " "rc %d\n", inode->i_ino, rc); iput(inode); GOTO(cleanup, rc); } child_ino = inode->i_ino; child_gen = inode->i_generation; child_res_id.name[0] = id_fid(&sid); child_res_id.name[1] = id_group(&sid); iput(inode); retry_locks: cleanup_phase = 2; /* child dentry */ /* Step 3: Lock parent and child in resource order. If child doesn't * exist, we still have to lock the parent and re-lookup. */ rc = enqueue_ordered_locks(obd, &parent_res_id, parent_lockh, parent_mode, &parent_policy, &child_res_id, child_lockh, child_mode, &child_policy); if (rc) GOTO(cleanup, rc); if ((*dchildp)->d_inode || ((*dchildp)->d_flags & DCACHE_CROSS_REF)) cleanup_phase = 4; /* child lock */ else cleanup_phase = 3; /* parent lock */ /* Step 4: Re-lookup child to verify it hasn't changed since locking */ rc = mds_verify_child(obd, &parent_res_id, parent_lockh, *dparentp, parent_mode, &child_res_id, child_lockh, dchildp, child_mode, &child_policy, name, namelen, &parent_res_id, child_ino, child_gen); if (rc > 0) goto retry_locks; if (rc < 0) { cleanup_phase = 3; GOTO(cleanup, rc); } EXIT; cleanup: if (rc) { switch (cleanup_phase) { case 4: ldlm_lock_decref(child_lockh, child_mode); case 3: ldlm_lock_decref(parent_lockh, parent_mode); case 2: l_dput(*dchildp); case 1: #ifdef S_PDIROPS if (parent_lockh[1].cookie) ldlm_lock_decref(parent_lockh + 1, *update_mode); #endif l_dput(*dparentp); } } return rc; } void mds_reconstruct_generic(struct ptlrpc_request *req) { struct mds_export_data *med = &req->rq_export->exp_mds_data; mds_req_from_mcd(req, med->med_mcd); } /* If we are unlinking an open file/dir (i.e. creating an orphan) then we * instead link the inode into the PENDING directory until it is finally * released. We can't simply call mds_reint_rename() or some part thereof, * because we don't have the inode to check for link count/open status until * after it is locked. * * For lock ordering, caller must get child->i_sem first, then pending->i_sem * before starting journal transaction. * * returns 1 on success * returns 0 if we lost a race and didn't make a new link * returns negative on error */ static int mds_orphan_add_link(struct mds_update_record *rec, struct obd_device *obd, struct dentry *dentry) { struct mds_obd *mds = &obd->u.mds; struct inode *pending_dir = mds->mds_pending_dir->d_inode; struct inode *inode = dentry->d_inode; struct dentry *pending_child; char idname[LL_ID_NAMELEN]; int idlen = 0, rc, mode; ENTRY; LASSERT(inode != NULL); LASSERT(!mds_inode_is_orphan(inode)); #ifndef HAVE_I_ALLOC_SEM LASSERT(down_trylock(&inode->i_sem) != 0); #endif LASSERT(down_trylock(&pending_dir->i_sem) != 0); idlen = ll_id2str(idname, inode->i_ino, inode->i_generation); CDEBUG(D_INODE, "pending destroy of %dx open %d linked %s %s = %s\n", mds_orphan_open_count(inode), inode->i_nlink, S_ISDIR(inode->i_mode) ? "dir" : S_ISREG(inode->i_mode) ? "file" : "other", rec->ur_name, idname); if (mds_orphan_open_count(inode) == 0 || inode->i_nlink != 0) RETURN(0); pending_child = lookup_one_len(idname, mds->mds_pending_dir, idlen); if (IS_ERR(pending_child)) RETURN(PTR_ERR(pending_child)); if (pending_child->d_inode != NULL) { CERROR("re-destroying orphan file %s?\n", rec->ur_name); LASSERT(pending_child->d_inode == inode); GOTO(out_dput, rc = 0); } /* * link() is semanticaly-wrong for S_IFDIR, so we set S_IFREG for * linking and return real mode back then -bzzz */ mode = inode->i_mode; inode->i_mode = S_IFREG; rc = vfs_link(dentry, pending_dir, pending_child); if (rc) CERROR("error linking orphan %s to PENDING: rc = %d\n", rec->ur_name, rc); else mds_inode_set_orphan(inode); /* return mode and correct i_nlink if inode is directory */ inode->i_mode = mode; LASSERTF(inode->i_nlink == 1, "%s nlink == %d\n", S_ISDIR(mode) ? "dir" : S_ISREG(mode) ? "file" : "other", inode->i_nlink); if (S_ISDIR(mode)) { inode->i_nlink++; pending_dir->i_nlink++; mark_inode_dirty(inode); mark_inode_dirty(pending_dir); } GOTO(out_dput, rc = 1); out_dput: l_dput(pending_child); return rc; } int mds_create_local_dentry(struct mds_update_record *rec, struct obd_device *obd) { struct mds_obd *mds = &obd->u.mds; struct inode *id_dir = mds->mds_id_dir->d_inode; int idlen = 0, rc, cleanup_phase = 0; struct dentry *new_child = NULL; char *idname = rec->ur_name; struct dentry *child = NULL; struct lustre_handle lockh[2] = {{0}, {0}}; struct lustre_id sid; void *handle; ENTRY; down(&id_dir->i_sem); idlen = ll_id2str(idname, id_ino(rec->ur_id1), id_gen(rec->ur_id1)); CDEBUG(D_OTHER, "look for local dentry '%s' for "DLID4"\n", idname, OLID4(rec->ur_id1)); new_child = ll_lookup_one_len(idname, mds->mds_id_dir, idlen); up(&id_dir->i_sem); if (IS_ERR(new_child)) { CERROR("can't lookup %s: %d\n", idname, (int) PTR_ERR(new_child)); GOTO(cleanup, rc = PTR_ERR(new_child)); } cleanup_phase = 1; down(&id_dir->i_sem); rc = mds_read_inode_sid(obd, id_dir, &sid); up(&id_dir->i_sem); if (rc) { CERROR("Can't read inode self id, inode %lu, " "rc %d\n", id_dir->i_ino, rc); GOTO(cleanup, rc); } if (new_child->d_inode != NULL) { /* nice. we've already have local dentry! */ CDEBUG(D_OTHER, "found dentry in FIDS/: %u/%u\n", (unsigned)new_child->d_inode->i_ino, (unsigned)new_child->d_inode->i_generation); id_ino(rec->ur_id1) = id_dir->i_ino; id_gen(rec->ur_id1) = id_dir->i_generation; rec->ur_namelen = idlen + 1; id_fid(rec->ur_id1) = id_fid(&sid); id_group(rec->ur_id1) = id_group(&sid); GOTO(cleanup, rc = 0); } /* new, local dentry will be added soon. we need no aliases here */ d_drop(new_child); if (rec->ur_mode & MDS_MODE_DONT_LOCK) { child = mds_id2dentry(obd, rec->ur_id1, NULL); } else { child = mds_id2locked_dentry(obd, rec->ur_id1, NULL, LCK_EX, lockh, NULL, NULL, 0, MDS_INODELOCK_UPDATE); } if (IS_ERR(child)) { rc = PTR_ERR(child); if (rc != -ENOENT || !(rec->ur_mode & MDS_MODE_REPLAY)) CERROR("can't get victim: %d\n", rc); GOTO(cleanup, rc); } cleanup_phase = 2; handle = fsfilt_start(obd, id_dir, FSFILT_OP_LINK, NULL); if (IS_ERR(handle)) GOTO(cleanup, rc = PTR_ERR(handle)); rc = fsfilt_add_dir_entry(obd, mds->mds_id_dir, idname, idlen, id_ino(rec->ur_id1), id_gen(rec->ur_id1), mds->mds_num, id_fid(rec->ur_id1)); if (rc) CERROR("error linking orphan %lu/%lu to FIDS: rc = %d\n", (unsigned long)child->d_inode->i_ino, (unsigned long)child->d_inode->i_generation, rc); else { if (S_ISDIR(child->d_inode->i_mode)) { id_dir->i_nlink++; mark_inode_dirty(id_dir); } mark_inode_dirty(child->d_inode); } fsfilt_commit(obd, mds->mds_sb, id_dir, handle, 0); id_ino(rec->ur_id1) = id_dir->i_ino; id_gen(rec->ur_id1) = id_dir->i_generation; rec->ur_namelen = idlen + 1; id_fid(rec->ur_id1) = id_fid(&sid); id_group(rec->ur_id1) = id_group(&sid); EXIT; cleanup: switch(cleanup_phase) { case 2: if (!(rec->ur_mode & MDS_MODE_DONT_LOCK)) ldlm_lock_decref(lockh, LCK_EX); dput(child); case 1: dput(new_child); case 0: break; } return rc; } static int mds_copy_unlink_reply(struct ptlrpc_request *master, struct ptlrpc_request *slave) { void *cookie, *cookie2; struct mds_body *body2; struct mds_body *body; void *ea, *ea2; ENTRY; body = lustre_msg_buf(slave->rq_repmsg, 0, sizeof(*body)); LASSERT(body != NULL); body2 = lustre_msg_buf(master->rq_repmsg, 0, sizeof (*body)); LASSERT(body2 != NULL); if (!(body->valid & (OBD_MD_FLID | OBD_MD_FLGENER))) RETURN(0); memcpy(body2, body, sizeof(*body)); body2->valid &= ~OBD_MD_FLCOOKIE; if (!(body->valid & OBD_MD_FLEASIZE) && !(body->valid & OBD_MD_FLDIREA)) RETURN(0); if (body->eadatasize == 0) { CERROR("OBD_MD_FLEASIZE set but eadatasize zero\n"); RETURN(0); } LASSERT(master->rq_repmsg->buflens[1] >= body->eadatasize); ea = lustre_msg_buf(slave->rq_repmsg, 1, body->eadatasize); LASSERT(ea != NULL); ea2 = lustre_msg_buf(master->rq_repmsg, 1, body->eadatasize); LASSERT(ea2 != NULL); memcpy(ea2, ea, body->eadatasize); if (body->valid & OBD_MD_FLCOOKIE) { LASSERT(master->rq_repmsg->buflens[2] >= slave->rq_repmsg->buflens[2]); cookie = lustre_msg_buf(slave->rq_repmsg, 2, slave->rq_repmsg->buflens[2]); LASSERT(cookie != NULL); cookie2 = lustre_msg_buf(master->rq_repmsg, 2, master->rq_repmsg->buflens[2]); LASSERT(cookie2 != NULL); memcpy(cookie2, cookie, slave->rq_repmsg->buflens[2]); body2->valid |= OBD_MD_FLCOOKIE; } RETURN(0); } static int mds_reint_unlink_remote(struct mds_update_record *rec, int offset, struct ptlrpc_request *req, struct lustre_handle *parent_lockh, int update_mode, struct dentry *dparent, struct lustre_handle *child_lockh, struct dentry *dchild) { struct obd_device *obd = req->rq_export->exp_obd; struct mds_obd *mds = mds_req2mds(req); struct ptlrpc_request *request = NULL; int rc = 0, cleanup_phase = 0; struct mdc_op_data *op_data; void *handle; ENTRY; LASSERT(offset == 1 || offset == 3); /* time to drop i_nlink on remote MDS */ OBD_ALLOC(op_data, sizeof(*op_data)); if (op_data == NULL) RETURN(-ENOMEM); memset(op_data, 0, sizeof(*op_data)); mds_pack_dentry2id(obd, &op_data->id1, dchild, 1); op_data->create_mode = rec->ur_mode; DEBUG_REQ(D_INODE, req, "unlink %*s (remote inode "DLID4")", rec->ur_namelen - 1, rec->ur_name, OLID4(&op_data->id1)); if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY) { DEBUG_REQ(D_HA, req, "unlink %*s (remote inode "DLID4")", rec->ur_namelen - 1, rec->ur_name, OLID4(&op_data->id1)); } if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY) op_data->create_mode |= MDS_MODE_REPLAY; rc = md_unlink(mds->mds_md_exp, op_data, &request); OBD_FREE(op_data, sizeof(*op_data)); cleanup_phase = 2; if (request) { if (rc == 0) mds_copy_unlink_reply(req, request); ptlrpc_req_finished(request); } if (rc == 0) { handle = fsfilt_start(obd, dparent->d_inode, FSFILT_OP_RMDIR, NULL); if (IS_ERR(handle)) GOTO(cleanup, rc = PTR_ERR(handle)); rc = fsfilt_del_dir_entry(req->rq_export->exp_obd, dchild); rc = mds_finish_transno(mds, dparent->d_inode, handle, req, rc, 0); } EXIT; cleanup: req->rq_status = rc; #ifdef S_PDIROPS if (parent_lockh[1].cookie != 0) ldlm_lock_decref(parent_lockh + 1, update_mode); #endif ldlm_lock_decref(child_lockh, LCK_EX); if (rc) ldlm_lock_decref(parent_lockh, LCK_PW); else ptlrpc_save_lock(req, parent_lockh, LCK_PW); l_dput(dchild); l_dput(dparent); return 0; } static int mds_reint_unlink(struct mds_update_record *rec, int offset, struct ptlrpc_request *req, struct lustre_handle *lh) { struct dentry *dparent = NULL, *dchild; struct mds_obd *mds = mds_req2mds(req); struct obd_device *obd = req->rq_export->exp_obd; struct mds_body *body = NULL; struct inode *child_inode = NULL; struct lustre_handle parent_lockh[2] = {{0}, {0}}; struct lustre_handle child_lockh = {0}; struct lustre_handle child_reuse_lockh = {0}; struct lustre_handle *slave_lockh = NULL; char idname[LL_ID_NAMELEN]; struct llog_create_locks *lcl = NULL; void *handle = NULL; int rc = 0, cleanup_phase = 0; int unlink_by_id = 0; int update_mode; ENTRY; LASSERT(offset == 1 || offset == 3); DEBUG_REQ(D_INODE, req, "parent ino "LPU64"/%u, child %s", id_ino(rec->ur_id1), id_gen(rec->ur_id1), rec->ur_name); MDS_CHECK_RESENT(req, mds_reconstruct_generic(req)); if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY) { DEBUG_REQ(D_HA, req, "unlink replay"); LASSERT(offset == 1); /* should not come from intent */ memcpy(lustre_msg_buf(req->rq_repmsg, 2, 0), lustre_msg_buf(req->rq_reqmsg, offset + 2, 0), req->rq_repmsg->buflens[2]); } MD_COUNTER_INCREMENT(obd, unlink); if (OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_UNLINK)) GOTO(cleanup, rc = -ENOENT); if (rec->ur_namelen == 1) { /* this is request to drop i_nlink on local inode */ unlink_by_id = 1; rec->ur_name = idname; rc = mds_create_local_dentry(rec, obd); if (rc == -ENOENT || (rec->ur_mode & MDS_MODE_REPLAY)) { DEBUG_REQ(D_HA, req, "drop nlink on inode "DLID4" (replay)", OLID4(rec->ur_id1)); req->rq_status = 0; RETURN(0); } } if (rec->ur_mode & MDS_MODE_DONT_LOCK) { /* master mds for directory asks slave removing inode is already * locked */ dparent = mds_id2locked_dentry(obd, rec->ur_id1, NULL, LCK_PW, parent_lockh, &update_mode, rec->ur_name, rec->ur_namelen, MDS_INODELOCK_UPDATE); if (IS_ERR(dparent)) GOTO(cleanup, rc = PTR_ERR(dparent)); dchild = ll_lookup_one_len(rec->ur_name, dparent, rec->ur_namelen - 1); if (IS_ERR(dchild)) GOTO(cleanup, rc = PTR_ERR(dchild)); child_lockh.cookie = 0; LASSERT(!(dchild->d_flags & DCACHE_CROSS_REF)); LASSERT(dchild->d_inode != NULL); LASSERT(S_ISDIR(dchild->d_inode->i_mode)); } else { rc = mds_get_parent_child_locked(obd, mds, rec->ur_id1, parent_lockh, &dparent, LCK_PW, MDS_INODELOCK_UPDATE, &update_mode, rec->ur_name, rec->ur_namelen, &child_lockh, &dchild, LCK_EX, MDS_INODELOCK_LOOKUP | MDS_INODELOCK_UPDATE); } if (rc) GOTO(cleanup, rc); if (dchild->d_flags & DCACHE_CROSS_REF) { /* we should have parent lock only here */ LASSERT(unlink_by_id == 0); LASSERT(dchild->d_mdsnum != mds->mds_num); mds_reint_unlink_remote(rec, offset, req, parent_lockh, update_mode, dparent, &child_lockh, dchild); RETURN(0); } cleanup_phase = 1; /* dchild, dparent, locks */ dget(dchild); child_inode = dchild->d_inode; if (child_inode == NULL) { CDEBUG(D_INODE, "child doesn't exist (dir %lu, name %s)\n", dparent ? dparent->d_inode->i_ino : 0, rec->ur_name); GOTO(cleanup, rc = -ENOENT); } cleanup_phase = 2; /* dchild has a lock */ /* We have to do these checks ourselves, in case we are making an * orphan. The client tells us whether rmdir() or unlink() was called, * so we need to return appropriate errors (bug 72). * * We don't have to check permissions, because vfs_rename (called from * mds_open_unlink_rename) also calls may_delete. */ if ((rec->ur_mode & S_IFMT) == S_IFDIR) { if (!S_ISDIR(child_inode->i_mode)) GOTO(cleanup, rc = -ENOTDIR); } else { if (S_ISDIR(child_inode->i_mode)) GOTO(cleanup, rc = -EISDIR); } /* handle splitted dir */ rc = mds_lock_slave_objs(obd, dchild, &slave_lockh); if (rc) GOTO(cleanup, rc); /* Step 4: Get a lock on the ino to sync with creation WRT inode * reuse (see bug 2029). */ rc = mds_lock_new_child(obd, child_inode, &child_reuse_lockh); if (rc != ELDLM_OK) GOTO(cleanup, rc); cleanup_phase = 3; /* child inum lock */ OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_UNLINK_WRITE, dparent->d_inode->i_sb); /* ldlm_reply in buf[0] if called via intent */ if (offset == 3) offset = 1; else offset = 0; body = lustre_msg_buf(req->rq_repmsg, offset, sizeof (*body)); LASSERT(body != NULL); /* child i_alloc_sem protects orphan_dec_test && is_orphan race */ DOWN_READ_I_ALLOC_SEM(child_inode); cleanup_phase = 4; /* up(&child_inode->i_sem) when finished */ /* If this is potentially the last reference to this inode, get the * OBD EA data first so the client can destroy OST objects. We * only do the object removal later if no open files/links remain. */ if ((S_ISDIR(child_inode->i_mode) && child_inode->i_nlink == 2) || child_inode->i_nlink == 1) { if (mds_orphan_open_count(child_inode) > 0) { /* need to lock pending_dir before transaction */ down(&mds->mds_pending_dir->d_inode->i_sem); cleanup_phase = 5; /* up(&pending_dir->i_sem) */ } else if (S_ISREG(child_inode->i_mode)) { mds_pack_inode2body(obd, body, child_inode, 0); mds_pack_md(obd, req->rq_repmsg, offset + 1, body, child_inode, MDS_PACK_MD_LOCK, 0); } } /* Step 4: Do the unlink: we already verified ur_mode above (bug 72) */ switch (child_inode->i_mode & S_IFMT) { case S_IFDIR: /* Drop any lingering child directories before we start our * transaction, to avoid doing multiple inode dirty/delete * in our compound transaction (bug 1321). */ shrink_dcache_parent(dchild); handle = fsfilt_start(obd, dparent->d_inode, FSFILT_OP_RMDIR, NULL); if (IS_ERR(handle)) GOTO(cleanup, rc = PTR_ERR(handle)); rc = vfs_rmdir(dparent->d_inode, dchild); break; case S_IFREG: { #warning "optimization is possible here: we could drop nlink w/o removing local dentry in FIDS/" struct lov_mds_md *lmm = lustre_msg_buf(req->rq_repmsg, offset + 1, 0); handle = fsfilt_start_log(obd, dparent->d_inode, FSFILT_OP_UNLINK, NULL, le32_to_cpu(lmm->lmm_stripe_count)); if (IS_ERR(handle)) GOTO(cleanup, rc = PTR_ERR(handle)); rc = vfs_unlink(dparent->d_inode, dchild); break; } case S_IFLNK: case S_IFCHR: case S_IFBLK: case S_IFIFO: case S_IFSOCK: handle = fsfilt_start(obd, dparent->d_inode, FSFILT_OP_UNLINK, NULL); if (IS_ERR(handle)) GOTO(cleanup, rc = PTR_ERR(handle)); rc = vfs_unlink(dparent->d_inode, dchild); break; default: CERROR("bad file type %o unlinking %s\n", rec->ur_mode, rec->ur_name); LBUG(); GOTO(cleanup, rc = -EINVAL); } if (rc == 0 && child_inode->i_nlink == 0) { if (mds_orphan_open_count(child_inode) > 0) rc = mds_orphan_add_link(rec, obd, dchild); if (rc == 1) GOTO(cleanup, rc = 0); if (!S_ISREG(child_inode->i_mode)) GOTO(cleanup, rc); if (!(body->valid & OBD_MD_FLEASIZE)) { body->valid |= (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS | OBD_MD_FLATIME | OBD_MD_FLMTIME); } else if (mds_log_op_unlink(obd, child_inode, lustre_msg_buf(req->rq_repmsg, offset + 1, 0), req->rq_repmsg->buflens[offset + 1], lustre_msg_buf(req->rq_repmsg, offset + 2, 0), req->rq_repmsg->buflens[offset + 2], &lcl) > 0){ body->valid |= OBD_MD_FLCOOKIE; } rc = mds_destroy_objects(obd, child_inode, 1); if (rc) { CERROR("can't remove OST object, err %d\n", rc); } } GOTO(cleanup, rc); cleanup: if (rc == 0) { struct iattr iattr; int err; iattr.ia_valid = ATTR_MTIME | ATTR_CTIME; LTIME_S(iattr.ia_mtime) = rec->ur_time; LTIME_S(iattr.ia_ctime) = rec->ur_time; err = fsfilt_setattr(obd, dparent, handle, &iattr, 0); if (err) CERROR("error on parent setattr: rc = %d\n", err); } rc = mds_finish_transno(mds, dparent ? dparent->d_inode : NULL, handle, req, rc, 0); if (!rc) (void)obd_set_info(mds->mds_dt_exp, strlen("unlinked"), "unlinked", 0, NULL); switch(cleanup_phase) { case 5: /* pending_dir semaphore */ up(&mds->mds_pending_dir->d_inode->i_sem); case 4: /* child inode semaphore */ UP_READ_I_ALLOC_SEM(child_inode); /* handle splitted dir */ if (rc == 0) { /* master directory can be non-empty or something else ... */ mds_unlink_slave_objs(obd, dchild); } if (lcl != NULL) ptlrpc_save_llog_lock(req, lcl); case 3: /* child ino-reuse lock */ if (rc && body != NULL) { // Don't unlink the OST objects if the MDS unlink failed body->valid = 0; } if (rc) ldlm_lock_decref(&child_reuse_lockh, LCK_EX); else ptlrpc_save_lock(req, &child_reuse_lockh, LCK_EX); case 2: /* child lock */ mds_unlock_slave_objs(obd, dchild, slave_lockh); if (child_lockh.cookie) ldlm_lock_decref(&child_lockh, LCK_EX); case 1: /* child and parent dentry, parent lock */ #ifdef S_PDIROPS if (parent_lockh[1].cookie != 0) ldlm_lock_decref(parent_lockh + 1, update_mode); #endif if (rc) ldlm_lock_decref(parent_lockh, LCK_PW); else ptlrpc_save_lock(req, parent_lockh, LCK_PW); l_dput(dchild); l_dput(dchild); l_dput(dparent); case 0: break; default: CERROR("invalid cleanup_phase %d\n", cleanup_phase); LBUG(); } req->rq_status = rc; return 0; } /* * to service requests from remote MDS to increment i_nlink */ static int mds_reint_link_acquire(struct mds_update_record *rec, int offset, struct ptlrpc_request *req, struct lustre_handle *lh) { struct obd_device *obd = req->rq_export->exp_obd; struct ldlm_res_id src_res_id = { .name = {0} }; struct lustre_handle *handle = NULL, src_lockh = {0}; struct mds_obd *mds = mds_req2mds(req); int rc = 0, cleanup_phase = 0; struct dentry *de_src = NULL; ldlm_policy_data_t policy; int flags = 0; ENTRY; DEBUG_REQ(D_INODE, req, "%s: request to acquire i_nlinks "DLID4"\n", obd->obd_name, OLID4(rec->ur_id1)); /* Step 1: Lookup the source inode and target directory by ID */ de_src = mds_id2dentry(obd, rec->ur_id1, NULL); if (IS_ERR(de_src)) GOTO(cleanup, rc = PTR_ERR(de_src)); cleanup_phase = 1; /* source dentry */ src_res_id.name[0] = id_fid(rec->ur_id1); src_res_id.name[1] = id_group(rec->ur_id1); policy.l_inodebits.bits = MDS_INODELOCK_UPDATE; rc = ldlm_cli_enqueue(NULL, NULL, obd->obd_namespace, src_res_id, LDLM_IBITS, &policy, LCK_EX, &flags, mds_blocking_ast, ldlm_completion_ast, NULL, NULL, NULL, 0, NULL, &src_lockh); if (rc != ELDLM_OK) GOTO(cleanup, rc = -ENOLCK); cleanup_phase = 2; /* lock */ OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_LINK_WRITE, de_src->d_inode->i_sb); handle = fsfilt_start(obd, de_src->d_inode, FSFILT_OP_LINK, NULL); if (IS_ERR(handle)) { rc = PTR_ERR(handle); GOTO(cleanup, rc); } de_src->d_inode->i_nlink++; mark_inode_dirty(de_src->d_inode); EXIT; cleanup: rc = mds_finish_transno(mds, de_src ? de_src->d_inode : NULL, handle, req, rc, 0); switch (cleanup_phase) { case 2: if (rc) ldlm_lock_decref(&src_lockh, LCK_EX); else ptlrpc_save_lock(req, &src_lockh, LCK_EX); case 1: l_dput(de_src); case 0: break; default: CERROR("invalid cleanup_phase %d\n", cleanup_phase); LBUG(); } req->rq_status = rc; return 0; } /* * request to link to foreign inode: * - acquire i_nlinks on this inode * - add dentry */ static int mds_reint_link_to_remote(struct mds_update_record *rec, int offset, struct ptlrpc_request *req, struct lustre_handle *lh) { struct lustre_handle *handle = NULL, tgt_dir_lockh[2] = {{0}, {0}}; struct obd_device *obd = req->rq_export->exp_obd; struct dentry *de_tgt_dir = NULL; struct mds_obd *mds = mds_req2mds(req); int rc = 0, cleanup_phase = 0; struct mdc_op_data *op_data; struct ptlrpc_request *request = NULL; int update_mode; ENTRY; DEBUG_REQ(D_INODE, req, "%s: request to link "DLID4 ":%*s to foreign inode "DLID4"\n", obd->obd_name, OLID4(rec->ur_id2), rec->ur_namelen - 1, rec->ur_name, OLID4(rec->ur_id1)); de_tgt_dir = mds_id2locked_dentry(obd, rec->ur_id2, NULL, LCK_EX, tgt_dir_lockh, &update_mode, rec->ur_name, rec->ur_namelen - 1, MDS_INODELOCK_UPDATE); if (IS_ERR(de_tgt_dir)) GOTO(cleanup, rc = PTR_ERR(de_tgt_dir)); cleanup_phase = 1; OBD_ALLOC(op_data, sizeof(*op_data)); if (op_data == NULL) GOTO(cleanup, rc = -ENOMEM); memset(op_data, 0, sizeof(*op_data)); op_data->id1 = *(rec->ur_id1); rc = md_link(mds->mds_md_exp, op_data, &request); OBD_FREE(op_data, sizeof(*op_data)); if (request) ptlrpc_req_finished(request); if (rc) GOTO(cleanup, rc); cleanup_phase = 2; OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_LINK_WRITE, de_tgt_dir->d_inode->i_sb); handle = fsfilt_start(obd, de_tgt_dir->d_inode, FSFILT_OP_LINK, NULL); if (IS_ERR(handle)) { rc = PTR_ERR(handle); GOTO(cleanup, rc); } cleanup_phase = 3; rc = fsfilt_add_dir_entry(obd, de_tgt_dir, rec->ur_name, rec->ur_namelen - 1, id_ino(rec->ur_id1), id_gen(rec->ur_id1), id_group(rec->ur_id1), id_fid(rec->ur_id1)); EXIT; cleanup: rc = mds_finish_transno(mds, de_tgt_dir ? de_tgt_dir->d_inode : NULL, handle, req, rc, 0); switch (cleanup_phase) { case 3: if (rc) { OBD_ALLOC(op_data, sizeof(*op_data)); if (op_data != NULL) { request = NULL; memset(op_data, 0, sizeof(*op_data)); op_data->id1 = *(rec->ur_id1); op_data->create_mode = rec->ur_mode; rc = md_unlink(mds->mds_md_exp, op_data, &request); OBD_FREE(op_data, sizeof(*op_data)); if (request) ptlrpc_req_finished(request); if (rc) { CERROR("error %d while dropping i_nlink on " "remote inode\n", rc); } } else { CERROR("rc %d prevented dropping i_nlink on " "remote inode\n", -ENOMEM); } } case 2: case 1: if (rc) { ldlm_lock_decref(tgt_dir_lockh, LCK_EX); #ifdef S_PDIROPS ldlm_lock_decref(tgt_dir_lockh + 1, update_mode); #endif } else { ptlrpc_save_lock(req, tgt_dir_lockh, LCK_EX); #ifdef S_PDIROPS ptlrpc_save_lock(req, tgt_dir_lockh + 1, update_mode); #endif } l_dput(de_tgt_dir); break; default: CERROR("invalid cleanup_phase %d\n", cleanup_phase); LBUG(); } req->rq_status = rc; return 0; } static int mds_reint_link(struct mds_update_record *rec, int offset, struct ptlrpc_request *req, struct lustre_handle *lh) { struct obd_device *obd = req->rq_export->exp_obd; struct dentry *de_src = NULL; struct dentry *de_tgt_dir = NULL; struct dentry *dchild = NULL; struct mds_obd *mds = mds_req2mds(req); struct lustre_handle *handle = NULL; struct lustre_handle tgt_dir_lockh[2] = {{0}, {0}}, src_lockh = {0}; struct ldlm_res_id src_res_id = { .name = {0} }; struct ldlm_res_id tgt_dir_res_id = { .name = {0} }; ldlm_policy_data_t src_policy ={.l_inodebits = {MDS_INODELOCK_UPDATE}}; ldlm_policy_data_t tgt_dir_policy = {.l_inodebits = {MDS_INODELOCK_UPDATE}}; int rc = 0, cleanup_phase = 0; #ifdef S_PDIROPS int update_mode = 0; #endif ENTRY; LASSERT(offset == 1); DEBUG_REQ(D_INODE, req, "original "LPU64"/%u to "LPU64"/%u %s", id_ino(rec->ur_id1), id_gen(rec->ur_id1), id_ino(rec->ur_id2), id_gen(rec->ur_id2), rec->ur_name); MDS_CHECK_RESENT(req, mds_reconstruct_generic(req)); MD_COUNTER_INCREMENT(obd, link); if (OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_LINK)) GOTO(cleanup, rc = -ENOENT); if (id_group(rec->ur_id1) != mds->mds_num) { rc = mds_reint_link_to_remote(rec, offset, req, lh); RETURN(rc); } if (rec->ur_namelen == 1) { rc = mds_reint_link_acquire(rec, offset, req, lh); RETURN(rc); } /* Step 1: Lookup the source inode and target directory by ID */ de_src = mds_id2dentry(obd, rec->ur_id1, NULL); if (IS_ERR(de_src)) GOTO(cleanup, rc = PTR_ERR(de_src)); cleanup_phase = 1; /* source dentry */ de_tgt_dir = mds_id2dentry(obd, rec->ur_id2, NULL); if (IS_ERR(de_tgt_dir)) { rc = PTR_ERR(de_tgt_dir); de_tgt_dir = NULL; GOTO(cleanup, rc); } cleanup_phase = 2; /* target directory dentry */ CDEBUG(D_INODE, "linking %*s/%s to inode %lu\n", de_tgt_dir->d_name.len, de_tgt_dir->d_name.name, rec->ur_name, de_src->d_inode->i_ino); /* Step 2: Take the two locks */ src_res_id.name[0] = id_fid(rec->ur_id1); src_res_id.name[1] = id_group(rec->ur_id1); tgt_dir_res_id.name[0] = id_fid(rec->ur_id2); tgt_dir_res_id.name[1] = id_group(rec->ur_id2); #ifdef S_PDIROPS if (IS_PDIROPS(de_tgt_dir->d_inode)) { int flags = 0; update_mode = mds_lock_mode_for_dir(obd, de_tgt_dir, LCK_EX); if (update_mode) { rc = ldlm_cli_enqueue(NULL, NULL, obd->obd_namespace, tgt_dir_res_id, LDLM_IBITS, &src_policy, update_mode, &flags, mds_blocking_ast, ldlm_completion_ast, NULL, NULL, NULL, 0, NULL, tgt_dir_lockh + 1); if (rc != ELDLM_OK) GOTO(cleanup, rc = -ENOLCK); } tgt_dir_res_id.name[2] = full_name_hash((unsigned char *)rec->ur_name, rec->ur_namelen - 1); CDEBUG(D_INFO, "take lock on %lu:%lu:"LPX64"\n", (unsigned long)id_fid(rec->ur_id2), (unsigned long)id_group(rec->ur_id2), tgt_dir_res_id.name[2]); } #endif rc = enqueue_ordered_locks(obd, &src_res_id, &src_lockh, LCK_EX, &src_policy, &tgt_dir_res_id, tgt_dir_lockh, LCK_EX, &tgt_dir_policy); if (rc) GOTO(cleanup, rc); cleanup_phase = 3; /* locks */ /* Step 3: Lookup the child */ dchild = ll_lookup_one_len(rec->ur_name, de_tgt_dir, rec->ur_namelen - 1); if (IS_ERR(dchild)) { rc = PTR_ERR(dchild); if (rc != -EPERM && rc != -EACCES) CERROR("child lookup error %d\n", rc); GOTO(cleanup, rc); } cleanup_phase = 4; /* child dentry */ if (dchild->d_inode) { CDEBUG(D_INODE, "child exists (dir %lu, name %s)\n", de_tgt_dir->d_inode->i_ino, rec->ur_name); rc = -EEXIST; GOTO(cleanup, rc); } /* Step 4: Do it. */ OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_LINK_WRITE, de_src->d_inode->i_sb); handle = fsfilt_start(obd, de_tgt_dir->d_inode, FSFILT_OP_LINK, NULL); if (IS_ERR(handle)) { rc = PTR_ERR(handle); GOTO(cleanup, rc); } rc = vfs_link(de_src, de_tgt_dir->d_inode, dchild); if (rc && rc != -EPERM && rc != -EACCES) CERROR("vfs_link error %d\n", rc); cleanup: rc = mds_finish_transno(mds, de_tgt_dir ? de_tgt_dir->d_inode : NULL, handle, req, rc, 0); EXIT; switch (cleanup_phase) { case 4: /* child dentry */ l_dput(dchild); case 3: /* locks */ if (rc) { ldlm_lock_decref(&src_lockh, LCK_EX); ldlm_lock_decref(tgt_dir_lockh, LCK_EX); } else { ptlrpc_save_lock(req, &src_lockh, LCK_EX); ptlrpc_save_lock(req, tgt_dir_lockh, LCK_EX); } case 2: /* target dentry */ #ifdef S_PDIROPS if (tgt_dir_lockh[1].cookie && update_mode) ldlm_lock_decref(tgt_dir_lockh + 1, update_mode); #endif if (de_tgt_dir) l_dput(de_tgt_dir); case 1: /* source dentry */ l_dput(de_src); case 0: break; default: CERROR("invalid cleanup_phase %d\n", cleanup_phase); LBUG(); } req->rq_status = rc; return 0; } /* The idea here is that we need to get four locks in the end: * one on each parent directory, one on each child. We need to take * these locks in some kind of order (to avoid deadlocks), and the order * I selected is "increasing resource number" order. We need to look up * the children, however, before we know what the resource number(s) are. * Thus the following plan: * * 1,2. Look up the parents * 3,4. Look up the children * 5. Take locks on the parents and children, in order * 6. Verify that the children haven't changed since they were looked up * * If there was a race and the children changed since they were first looked * up, it is possible that mds_verify_child() will be able to just grab the * lock on the new child resource (if it has a higher resource than any other) * but we need to compare against not only its parent, but also against the * parent and child of the "other half" of the rename, hence maxres_{src,tgt}. * * We need the fancy igrab() on the child inodes because we aren't holding a * lock on the parent after the lookup is done, so dentry->d_inode may change * at any time, and igrab() itself doesn't like getting passed a NULL argument. */ static int mds_get_parents_children_locked(struct obd_device *obd, struct mds_obd *mds, struct lustre_id *p1_id, struct dentry **de_srcdirp, struct lustre_id *p2_id, struct dentry **de_tgtdirp, int parent_mode, const char *old_name, int old_len, struct dentry **de_oldp, const char *new_name, int new_len, struct dentry **de_newp, struct lustre_handle *dlm_handles, int child_mode) { struct ldlm_res_id p1_res_id = { .name = {0} }; struct ldlm_res_id p2_res_id = { .name = {0} }; struct ldlm_res_id c1_res_id = { .name = {0} }; struct ldlm_res_id c2_res_id = { .name = {0} }; ldlm_policy_data_t p_policy = {.l_inodebits = {MDS_INODELOCK_UPDATE}}; /* Only dentry should disappear, but the inode itself would be intact otherwise. */ ldlm_policy_data_t c1_policy = {.l_inodebits = {MDS_INODELOCK_LOOKUP}}; /* If something is going to be replaced, both dentry and inode locks are needed */ ldlm_policy_data_t c2_policy = {.l_inodebits = {MDS_INODELOCK_FULL}}; struct ldlm_res_id *maxres_src, *maxres_tgt; struct inode *inode; int rc = 0, cleanup_phase = 0; __u32 child_gen1 = 0; __u32 child_gen2 = 0; unsigned long child_ino1 = 0; unsigned long child_ino2 = 0; ENTRY; /* Step 1: Lookup the source directory */ *de_srcdirp = mds_id2dentry(obd, p1_id, NULL); if (IS_ERR(*de_srcdirp)) GOTO(cleanup, rc = PTR_ERR(*de_srcdirp)); cleanup_phase = 1; /* source directory dentry */ p1_res_id.name[0] = id_fid(p1_id); p1_res_id.name[1] = id_group(p1_id); /* Step 2: Lookup the target directory */ if (id_equal_stc(p1_id, p2_id)) { *de_tgtdirp = dget(*de_srcdirp); } else { *de_tgtdirp = mds_id2dentry(obd, p2_id, NULL); if (IS_ERR(*de_tgtdirp)) { rc = PTR_ERR(*de_tgtdirp); *de_tgtdirp = NULL; GOTO(cleanup, rc); } } cleanup_phase = 2; /* target directory dentry */ p2_res_id.name[0] = id_fid(p2_id); p2_res_id.name[1] = id_group(p2_id); #ifdef S_PDIROPS dlm_handles[5].cookie = 0; dlm_handles[6].cookie = 0; if (IS_PDIROPS((*de_srcdirp)->d_inode)) { /* * get a temp lock on just fid, group to flush client cache and * to protect dirs from concurrent splitting. */ rc = enqueue_ordered_locks(obd, &p1_res_id, &dlm_handles[5], LCK_PW, &p_policy, &p2_res_id, &dlm_handles[6], LCK_PW, &p_policy); if (rc != ELDLM_OK) GOTO(cleanup, rc); p1_res_id.name[2] = full_name_hash((unsigned char *)old_name, old_len - 1); p2_res_id.name[2] = full_name_hash((unsigned char *)new_name, new_len - 1); CDEBUG(D_INFO, "take locks on " LPX64":"LPX64":"LPX64", "LPX64":"LPX64":"LPX64"\n", p1_res_id.name[0], p1_res_id.name[1], p1_res_id.name[2], p2_res_id.name[0], p2_res_id.name[1], p2_res_id.name[2]); } cleanup_phase = 3; #endif /* Step 3: Lookup the source child entry */ *de_oldp = ll_lookup_one_len(old_name, *de_srcdirp, old_len - 1); if (IS_ERR(*de_oldp)) { rc = PTR_ERR(*de_oldp); CERROR("old child lookup error (%.*s): %d\n", old_len - 1, old_name, rc); GOTO(cleanup, rc); } cleanup_phase = 4; /* original name dentry */ inode = (*de_oldp)->d_inode; if (inode != NULL) { struct lustre_id sid; inode = igrab(inode); if (inode == NULL) GOTO(cleanup, rc = -ENOENT); down(&inode->i_sem); rc = mds_read_inode_sid(obd, inode, &sid); up(&inode->i_sem); if (rc) { CERROR("Can't read inode self id, inode %lu, " "rc %d\n", inode->i_ino, rc); iput(inode); GOTO(cleanup, rc); } child_ino1 = inode->i_ino; child_gen1 = inode->i_generation; c1_res_id.name[0] = id_fid(&sid); c1_res_id.name[1] = id_group(&sid); iput(inode); } else if ((*de_oldp)->d_flags & DCACHE_CROSS_REF) { child_ino1 = (*de_oldp)->d_inum; child_gen1 = (*de_oldp)->d_generation; c1_res_id.name[0] = (*de_oldp)->d_fid; c1_res_id.name[1] = (*de_oldp)->d_mdsnum; } else { GOTO(cleanup, rc = -ENOENT); } /* Step 4: Lookup the target child entry */ *de_newp = ll_lookup_one_len(new_name, *de_tgtdirp, new_len - 1); if (IS_ERR(*de_newp)) { rc = PTR_ERR(*de_newp); CERROR("new child lookup error (%.*s): %d\n", old_len - 1, old_name, rc); GOTO(cleanup, rc); } cleanup_phase = 5; /* target dentry */ inode = (*de_newp)->d_inode; if (inode != NULL) { struct lustre_id sid; inode = igrab(inode); if (inode == NULL) goto retry_locks; down(&inode->i_sem); rc = mds_read_inode_sid(obd, inode, &sid); up(&inode->i_sem); if (rc) { CERROR("Can't read inode self id, inode %lu, " "rc %d\n", inode->i_ino, rc); GOTO(cleanup, rc); } child_ino2 = inode->i_ino; child_gen2 = inode->i_generation; c2_res_id.name[0] = id_fid(&sid); c2_res_id.name[1] = id_group(&sid); iput(inode); } else if ((*de_newp)->d_flags & DCACHE_CROSS_REF) { child_ino2 = (*de_newp)->d_inum; child_gen2 = (*de_newp)->d_generation; c2_res_id.name[0] = (*de_newp)->d_fid; c2_res_id.name[1] = (*de_newp)->d_mdsnum; } retry_locks: /* Step 5: Take locks on the parents and child(ren) */ maxres_src = &p1_res_id; maxres_tgt = &p2_res_id; cleanup_phase = 5; /* target dentry */ if (c1_res_id.name[0] != 0 && res_gt(&c1_res_id, &p1_res_id, NULL, NULL)) maxres_src = &c1_res_id; if (c2_res_id.name[0] != 0 && res_gt(&c2_res_id, &p2_res_id, NULL, NULL)) maxres_tgt = &c2_res_id; rc = enqueue_4ordered_locks(obd, &p1_res_id, &dlm_handles[0], parent_mode, &p_policy, &p2_res_id, &dlm_handles[1], parent_mode, &p_policy, &c1_res_id, &dlm_handles[2], child_mode, &c1_policy, &c2_res_id, &dlm_handles[3], child_mode, &c2_policy); if (rc) GOTO(cleanup, rc); cleanup_phase = 6; /* parent and child(ren) locks */ /* Step 6a: Re-lookup source child to verify it hasn't changed */ rc = mds_verify_child(obd, &p1_res_id, &dlm_handles[0], *de_srcdirp, parent_mode, &c1_res_id, &dlm_handles[2], de_oldp, child_mode, &c1_policy, old_name, old_len, maxres_tgt, child_ino1, child_gen1); if (rc) { if (c2_res_id.name[0] != 0) ldlm_lock_decref(&dlm_handles[3], child_mode); ldlm_lock_decref(&dlm_handles[1], parent_mode); cleanup_phase = 5; if (rc > 0) goto retry_locks; GOTO(cleanup, rc); } if (!DENTRY_VALID(*de_oldp)) GOTO(cleanup, rc = -ENOENT); /* Step 6b: Re-lookup target child to verify it hasn't changed */ rc = mds_verify_child(obd, &p2_res_id, &dlm_handles[1], *de_tgtdirp, parent_mode, &c2_res_id, &dlm_handles[3], de_newp, child_mode, &c2_policy, new_name, new_len, maxres_src, child_ino2, child_gen2); if (rc) { ldlm_lock_decref(&dlm_handles[2], child_mode); ldlm_lock_decref(&dlm_handles[0], parent_mode); cleanup_phase = 5; if (rc > 0) goto retry_locks; GOTO(cleanup, rc); } EXIT; cleanup: if (rc) { switch (cleanup_phase) { case 6: /* child lock(s) */ if (c2_res_id.name[0] != 0) ldlm_lock_decref(&dlm_handles[3], child_mode); if (c1_res_id.name[0] != 0) ldlm_lock_decref(&dlm_handles[2], child_mode); if (dlm_handles[1].cookie != 0) ldlm_lock_decref(&dlm_handles[1], parent_mode); if (dlm_handles[0].cookie != 0) ldlm_lock_decref(&dlm_handles[0], parent_mode); case 5: /* target dentry */ l_dput(*de_newp); case 4: /* source dentry */ l_dput(*de_oldp); case 3: #ifdef S_PDIROPS if (dlm_handles[5].cookie != 0) ldlm_lock_decref(&(dlm_handles[5]), LCK_PW); if (dlm_handles[6].cookie != 0) ldlm_lock_decref(&(dlm_handles[6]), LCK_PW); #endif case 2: /* target directory dentry */ l_dput(*de_tgtdirp); case 1: /* source directry dentry */ l_dput(*de_srcdirp); } } return rc; } /* * checks if dentry can be removed. This function also handles cross-ref * dentries. */ static int mds_check_for_rename(struct obd_device *obd, struct dentry *dentry) { struct mds_obd *mds = &obd->u.mds; struct lustre_handle *rlockh; struct ptlrpc_request *req; struct mdc_op_data *op_data; struct lookup_intent it; int handle_size, rc = 0; ENTRY; LASSERT(dentry != NULL); if (dentry->d_inode) { if (S_ISDIR(dentry->d_inode->i_mode) && !mds_is_dir_empty(obd, dentry)) rc = -ENOTEMPTY; } else { LASSERT((dentry->d_flags & DCACHE_CROSS_REF)); handle_size = sizeof(struct lustre_handle); OBD_ALLOC(rlockh, handle_size); if (rlockh == NULL) RETURN(-ENOMEM); memset(rlockh, 0, handle_size); OBD_ALLOC(op_data, sizeof(*op_data)); if (op_data == NULL) { OBD_FREE(rlockh, handle_size); RETURN(-ENOMEM); } memset(op_data, 0, sizeof(*op_data)); mds_pack_dentry2id(obd, &op_data->id1, dentry, 1); it.it_op = IT_UNLINK; OBD_ALLOC(it.d.fs_data, sizeof(struct lustre_intent_data)); if (!it.d.fs_data) RETURN(-ENOMEM); rc = md_enqueue(mds->mds_md_exp, LDLM_IBITS, &it, LCK_EX, op_data, rlockh, NULL, 0, ldlm_completion_ast, mds_blocking_ast, NULL); OBD_FREE(op_data, sizeof(*op_data)); if (rc) { OBD_FREE(it.d.fs_data, sizeof(struct lustre_intent_data)); RETURN(rc); } if (rlockh->cookie != 0) ldlm_lock_decref(rlockh, LCK_EX); if (LUSTRE_IT(&it)->it_data) { req = (struct ptlrpc_request *)LUSTRE_IT(&it)->it_data; ptlrpc_req_finished(req); } if (LUSTRE_IT(&it)->it_status) rc = LUSTRE_IT(&it)->it_status; OBD_FREE(it.d.fs_data, sizeof(struct lustre_intent_data)); OBD_FREE(rlockh, handle_size); } RETURN(rc); } static int mds_add_local_dentry(struct mds_update_record *rec, int offset, struct ptlrpc_request *req, struct lustre_id *id, struct dentry *de_dir, struct dentry *de) { struct obd_device *obd = req->rq_export->exp_obd; struct mds_obd *mds = mds_req2mds(req); void *handle = NULL; int rc = 0; ENTRY; if (de->d_inode) { /* * name exists and points to local inode try to unlink this name * and create new one. */ CDEBUG(D_OTHER, "%s: %s points to local inode %lu/%lu\n", obd->obd_name, rec->ur_tgt, (unsigned long)de->d_inode->i_ino, (unsigned long)de->d_inode->i_generation); /* checking if we can remove local dentry. */ rc = mds_check_for_rename(obd, de); if (rc) GOTO(cleanup, rc); handle = fsfilt_start(obd, de_dir->d_inode, FSFILT_OP_RENAME, NULL); if (IS_ERR(handle)) GOTO(cleanup, rc = PTR_ERR(handle)); rc = fsfilt_del_dir_entry(req->rq_export->exp_obd, de); if (rc) GOTO(cleanup, rc); } else if (de->d_flags & DCACHE_CROSS_REF) { CDEBUG(D_OTHER, "%s: %s points to remote inode %lu/%lu\n", obd->obd_name, rec->ur_tgt, (unsigned long)de->d_mdsnum, (unsigned long)de->d_fid); /* checking if we can remove local dentry. */ rc = mds_check_for_rename(obd, de); if (rc) GOTO(cleanup, rc); /* * to be fully POSIX compatible, we should add one more check: * * if de_new is subdir of dir rec->ur_id1. If so - return * -EINVAL. * * I do not know how to implement it right now, because * inodes/dentries for new and old names lie on different MDS, * so add this notice here just to make it visible for the rest * of developers and do not forget about. And when this check * will be added, del_cross_ref should gone, that is local * dentry is able to be removed if all checks passed. --umka */ handle = fsfilt_start(obd, de_dir->d_inode, FSFILT_OP_RENAME, NULL); if (IS_ERR(handle)) GOTO(cleanup, rc = PTR_ERR(handle)); rc = fsfilt_del_dir_entry(req->rq_export->exp_obd, de); if (rc) GOTO(cleanup, rc); } else { /* name doesn't exist. the simplest case. */ handle = fsfilt_start(obd, de_dir->d_inode, FSFILT_OP_LINK, NULL); if (IS_ERR(handle)) GOTO(cleanup, rc = PTR_ERR(handle)); } rc = fsfilt_add_dir_entry(obd, de_dir, rec->ur_tgt, rec->ur_tgtlen - 1, id_ino(id), id_gen(id), id_group(id), id_fid(id)); if (rc) { CERROR("add_dir_entry() returned error %d\n", rc); GOTO(cleanup, rc); } EXIT; cleanup: rc = mds_finish_transno(mds, de_dir ? de_dir->d_inode : NULL, handle, req, rc, 0); return rc; } static int mds_del_local_dentry(struct mds_update_record *rec, int offset, struct ptlrpc_request *req, struct dentry *de_dir, struct dentry *de) { struct obd_device *obd = req->rq_export->exp_obd; struct mds_obd *mds = mds_req2mds(req); void *handle = NULL; int rc = 0; ENTRY; handle = fsfilt_start(obd, de_dir->d_inode, FSFILT_OP_UNLINK, NULL); if (IS_ERR(handle)) GOTO(cleanup, rc = PTR_ERR(handle)); rc = fsfilt_del_dir_entry(obd, de); d_drop(de); EXIT; cleanup: rc = mds_finish_transno(mds, de_dir ? de_dir->d_inode : NULL, handle, req, rc, 0); return rc; } static int mds_reint_rename_create_name(struct mds_update_record *rec, int offset, struct ptlrpc_request *req) { struct lustre_handle parent_lockh[2] = {{0}, {0}}; struct obd_device *obd = req->rq_export->exp_obd; struct mds_obd *mds = mds_req2mds(req); struct lustre_handle child_lockh = {0}; struct dentry *de_tgtdir = NULL; struct dentry *de_new = NULL; int cleanup_phase = 0; int update_mode, rc = 0; ENTRY; /* * another MDS executing rename operation has asked us to create target * name. such a creation should destroy existing target name. */ CDEBUG(D_OTHER, "%s: request to create name %s for "DLID4"\n", obd->obd_name, rec->ur_tgt, OLID4(rec->ur_id1)); /* first, lookup the target */ rc = mds_get_parent_child_locked(obd, mds, rec->ur_id2, parent_lockh, &de_tgtdir, LCK_PW, MDS_INODELOCK_UPDATE, &update_mode, rec->ur_tgt, rec->ur_tgtlen, &child_lockh, &de_new, LCK_EX, MDS_INODELOCK_LOOKUP); if (rc) GOTO(cleanup, rc); cleanup_phase = 1; LASSERT(de_tgtdir); LASSERT(de_tgtdir->d_inode); LASSERT(de_new); rc = mds_add_local_dentry(rec, offset, req, rec->ur_id1, de_tgtdir, de_new); EXIT; cleanup: if (cleanup_phase == 1) { #ifdef S_PDIROPS if (parent_lockh[1].cookie != 0) ldlm_lock_decref(parent_lockh + 1, update_mode); #endif ldlm_lock_decref(parent_lockh, LCK_PW); if (child_lockh.cookie != 0) ldlm_lock_decref(&child_lockh, LCK_EX); l_dput(de_new); l_dput(de_tgtdir); } req->rq_status = rc; return 0; } static int mds_reint_rename_to_remote(struct mds_update_record *rec, int offset, struct ptlrpc_request *req) { struct obd_device *obd = req->rq_export->exp_obd; struct ptlrpc_request *req2 = NULL; struct dentry *de_srcdir = NULL; struct dentry *de_old = NULL; struct mds_obd *mds = mds_req2mds(req); struct lustre_handle parent_lockh[2] = {{0}, {0}}; struct lustre_handle child_lockh = {0}; struct mdc_op_data *op_data; int update_mode, rc = 0; ENTRY; CDEBUG(D_OTHER, "%s: move name %s onto another mds #%lu\n", obd->obd_name, rec->ur_name, (unsigned long)id_group(rec->ur_id2)); OBD_ALLOC(op_data, sizeof(*op_data)); if (op_data == NULL) RETURN(-ENOMEM); memset(op_data, 0, sizeof(*op_data)); rc = mds_get_parent_child_locked(obd, mds, rec->ur_id1, parent_lockh, &de_srcdir, LCK_PW, MDS_INODELOCK_UPDATE, &update_mode, rec->ur_name, rec->ur_namelen, &child_lockh, &de_old, LCK_EX, MDS_INODELOCK_LOOKUP); if (rc) { OBD_FREE(op_data, sizeof(*op_data)); RETURN(rc); } LASSERT(de_srcdir); LASSERT(de_srcdir->d_inode); LASSERT(de_old); /* * we already know the target should be created on another MDS so, we * have to request that MDS to do it. */ /* prepare source id */ if (de_old->d_flags & DCACHE_CROSS_REF) { LASSERT(de_old->d_inode == NULL); CDEBUG(D_OTHER, "request to move remote name\n"); mds_pack_dentry2id(obd, &op_data->id1, de_old, 1); } else if (de_old->d_inode == NULL) { /* oh, source doesn't exist */ OBD_FREE(op_data, sizeof(*op_data)); GOTO(cleanup, rc = -ENOENT); } else { struct lustre_id sid; struct inode *inode = de_old->d_inode; LASSERT(inode != NULL); CDEBUG(D_OTHER, "request to move local name\n"); id_ino(&op_data->id1) = inode->i_ino; id_group(&op_data->id1) = mds->mds_num; id_gen(&op_data->id1) = inode->i_generation; down(&inode->i_sem); rc = mds_read_inode_sid(obd, inode, &sid); up(&inode->i_sem); if (rc) { CERROR("Can't read inode self id, " "inode %lu, rc = %d\n", inode->i_ino, rc); GOTO(cleanup, rc); } id_fid(&op_data->id1) = id_fid(&sid); } op_data->id2 = *rec->ur_id2; rc = md_rename(mds->mds_md_exp, op_data, NULL, 0, rec->ur_tgt, rec->ur_tgtlen - 1, &req2); OBD_FREE(op_data, sizeof(*op_data)); if (rc) GOTO(cleanup, rc); rc = mds_del_local_dentry(rec, offset, req, de_srcdir, de_old); EXIT; cleanup: if (req2) ptlrpc_req_finished(req2); #ifdef S_PDIROPS if (parent_lockh[1].cookie != 0) ldlm_lock_decref(parent_lockh + 1, update_mode); #endif ldlm_lock_decref(parent_lockh, LCK_PW); if (child_lockh.cookie != 0) ldlm_lock_decref(&child_lockh, LCK_EX); l_dput(de_old); l_dput(de_srcdir); req->rq_status = rc; return 0; } static int mds_reint_rename(struct mds_update_record *rec, int offset, struct ptlrpc_request *req, struct lustre_handle *lockh) { struct obd_device *obd = req->rq_export->exp_obd; struct dentry *de_srcdir = NULL; struct dentry *de_tgtdir = NULL; struct dentry *de_old = NULL; struct dentry *de_new = NULL; struct inode *old_inode = NULL, *new_inode = NULL; struct mds_obd *mds = mds_req2mds(req); struct lustre_handle dlm_handles[7] = {{0},{0},{0},{0},{0},{0},{0}}; struct mds_body *body = NULL; struct llog_create_locks *lcl = NULL; struct lov_mds_md *lmm = NULL; int rc = 0, cleanup_phase = 0; void *handle = NULL; ENTRY; LASSERT(offset == 1); DEBUG_REQ(D_INODE, req, "parent "DLID4" %s to "DLID4" %s", OLID4(rec->ur_id1), rec->ur_name, OLID4(rec->ur_id2), rec->ur_tgt); MDS_CHECK_RESENT(req, mds_reconstruct_generic(req)); if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY) { DEBUG_REQ(D_HA, req, "rename replay"); memcpy(lustre_msg_buf(req->rq_repmsg, 2, 0), lustre_msg_buf(req->rq_reqmsg, offset + 3, 0), req->rq_repmsg->buflens[2]); } MD_COUNTER_INCREMENT(obd, rename); if (rec->ur_namelen == 1) { rc = mds_reint_rename_create_name(rec, offset, req); RETURN(rc); } /* check if new name should be located on remote target. */ if (id_group(rec->ur_id2) != mds->mds_num) { rc = mds_reint_rename_to_remote(rec, offset, req); RETURN(rc); } rc = mds_get_parents_children_locked(obd, mds, rec->ur_id1, &de_srcdir, rec->ur_id2, &de_tgtdir, LCK_PW, rec->ur_name, rec->ur_namelen, &de_old, rec->ur_tgt, rec->ur_tgtlen, &de_new, dlm_handles, LCK_EX); if (rc) GOTO(cleanup, rc); cleanup_phase = 1; /* parent(s), children, locks */ old_inode = de_old->d_inode; new_inode = de_new->d_inode; /* sanity check for src inode */ if (de_old->d_flags & DCACHE_CROSS_REF) { LASSERT(de_old->d_inode == NULL); /* * in the case of cross-ref dir, we can perform this check only * if child and parent lie on the same mds. This is because * otherwise they can have the same inode numbers. */ if (de_old->d_mdsnum == mds->mds_num) { if (de_old->d_inum == de_srcdir->d_inode->i_ino || de_old->d_inum == de_tgtdir->d_inode->i_ino) GOTO(cleanup, rc = -EINVAL); } } else { LASSERT(de_old->d_inode != NULL); if (de_old->d_inode->i_ino == de_srcdir->d_inode->i_ino || de_old->d_inode->i_ino == de_tgtdir->d_inode->i_ino) GOTO(cleanup, rc = -EINVAL); } /* sanity check for dest inode */ if (de_new->d_flags & DCACHE_CROSS_REF) { LASSERT(new_inode == NULL); /* the same check about target dentry. */ if (de_new->d_mdsnum == mds->mds_num) { if (de_new->d_inum == de_srcdir->d_inode->i_ino || de_new->d_inum == de_tgtdir->d_inode->i_ino) GOTO(cleanup, rc = -EINVAL); } /* * regular files usualy do not have ->rename() implemented. But * we handle only this case when @de_new is cross-ref entry, * because in other cases it will be handled by vfs_rename(). */ if (de_old->d_inode && (!de_old->d_inode->i_op || !de_old->d_inode->i_op->rename)) GOTO(cleanup, rc = -EPERM); } else { if (new_inode && (new_inode->i_ino == de_srcdir->d_inode->i_ino || new_inode->i_ino == de_tgtdir->d_inode->i_ino)) GOTO(cleanup, rc = -EINVAL); } /* * check if inodes point to each other. This should be checked before * is_subdir() check, as for the same entries it will think that they * are subdirs. */ if (!(de_old->d_flags & DCACHE_CROSS_REF) && !(de_new->d_flags & DCACHE_CROSS_REF) && old_inode == new_inode) GOTO(cleanup, rc = 0); #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) /* * check if we are moving old entry into its child. 2.6 does not check * for this in vfs_rename() anymore. */ if (is_subdir(de_new, de_old)) GOTO(cleanup, rc = -EINVAL); #endif /* * if we are about to remove the target at first, pass the EA of that * inode to client to perform and cleanup on OST. */ body = lustre_msg_buf(req->rq_repmsg, 0, sizeof (*body)); LASSERT(body != NULL); /* child i_alloc_sem protects orphan_dec_test && is_orphan race */ if (new_inode) DOWN_READ_I_ALLOC_SEM(new_inode); cleanup_phase = 2; /* up(&new_inode->i_sem) when finished */ if (new_inode && ((S_ISDIR(new_inode->i_mode) && new_inode->i_nlink == 2) || new_inode->i_nlink == 1)) { if (mds_orphan_open_count(new_inode) > 0) { /* need to lock pending_dir before transaction */ down(&mds->mds_pending_dir->d_inode->i_sem); cleanup_phase = 3; /* up(&pending_dir->i_sem) */ } else if (S_ISREG(new_inode->i_mode)) { mds_pack_inode2body(obd, body, new_inode, 0); mds_pack_md(obd, req->rq_repmsg, 1, body, new_inode, MDS_PACK_MD_LOCK, 0); } } OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_RENAME_WRITE, de_srcdir->d_inode->i_sb); if (de_old->d_flags & DCACHE_CROSS_REF) { struct lustre_id old_id; mds_pack_dentry2id(obd, &old_id, de_old, 1); rc = mds_add_local_dentry(rec, offset, req, &old_id, de_tgtdir, de_new); if (rc) GOTO(cleanup, rc); rc = mds_del_local_dentry(rec, offset, req, de_srcdir, de_old); GOTO(cleanup, rc); } lmm = lustre_msg_buf(req->rq_repmsg, 1, 0); handle = fsfilt_start_log(obd, de_tgtdir->d_inode, FSFILT_OP_RENAME, NULL, le32_to_cpu(lmm->lmm_stripe_count)); if (IS_ERR(handle)) GOTO(cleanup, rc = PTR_ERR(handle)); lock_kernel(); de_old->d_fsdata = req; de_new->d_fsdata = req; rc = vfs_rename(de_srcdir->d_inode, de_old, de_tgtdir->d_inode, de_new); unlock_kernel(); if (rc == 0 && new_inode != NULL && new_inode->i_nlink == 0) { if (mds_orphan_open_count(new_inode) > 0) rc = mds_orphan_add_link(rec, obd, de_new); if (rc == 1) GOTO(cleanup, rc = 0); if (!S_ISREG(new_inode->i_mode)) GOTO(cleanup, rc); if (!(body->valid & OBD_MD_FLEASIZE)) { body->valid |= (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS | OBD_MD_FLATIME | OBD_MD_FLMTIME); } else if (mds_log_op_unlink(obd, new_inode, lustre_msg_buf(req->rq_repmsg,1,0), req->rq_repmsg->buflens[1], lustre_msg_buf(req->rq_repmsg,2,0), req->rq_repmsg->buflens[2], &lcl) > 0) { body->valid |= OBD_MD_FLCOOKIE; } rc = mds_destroy_objects(obd, old_inode, 1); if (rc) { CERROR("can't remove OST object, err %d\n", rc); } } EXIT; cleanup: rc = mds_finish_transno(mds, (de_tgtdir ? de_tgtdir->d_inode : NULL), handle, req, rc, 0); switch (cleanup_phase) { case 3: up(&mds->mds_pending_dir->d_inode->i_sem); case 2: if (new_inode) UP_READ_I_ALLOC_SEM(new_inode); case 1: #ifdef S_PDIROPS if (dlm_handles[5].cookie != 0) ldlm_lock_decref(&(dlm_handles[5]), LCK_PW); if (dlm_handles[6].cookie != 0) ldlm_lock_decref(&(dlm_handles[6]), LCK_PW); #endif if (lcl != NULL) ptlrpc_save_llog_lock(req, lcl); if (rc) { if (dlm_handles[3].cookie != 0) ldlm_lock_decref(&(dlm_handles[3]), LCK_EX); ldlm_lock_decref(&(dlm_handles[2]), LCK_EX); ldlm_lock_decref(&(dlm_handles[1]), LCK_PW); ldlm_lock_decref(&(dlm_handles[0]), LCK_PW); } else { if (dlm_handles[3].cookie != 0) ptlrpc_save_lock(req,&(dlm_handles[3]), LCK_EX); ptlrpc_save_lock(req, &(dlm_handles[2]), LCK_EX); ptlrpc_save_lock(req, &(dlm_handles[1]), LCK_PW); ptlrpc_save_lock(req, &(dlm_handles[0]), LCK_PW); } l_dput(de_new); l_dput(de_old); l_dput(de_tgtdir); l_dput(de_srcdir); case 0: break; default: CERROR("invalid cleanup_phase %d\n", cleanup_phase); LBUG(); } req->rq_status = rc; return 0; } typedef int (*mds_reinter)(struct mds_update_record *, int offset, struct ptlrpc_request *, struct lustre_handle *); static mds_reinter reinters[REINT_MAX + 1] = { [REINT_SETATTR] mds_reint_setattr, [REINT_CREATE] mds_reint_create, [REINT_LINK] mds_reint_link, [REINT_UNLINK] mds_reint_unlink, [REINT_RENAME] mds_reint_rename, [REINT_OPEN] mds_open }; int mds_reint_rec(struct mds_update_record *rec, int offset, struct ptlrpc_request *req, struct lustre_handle *lockh) { struct obd_device *obd = req->rq_export->exp_obd; struct lvfs_run_ctxt saved; int rc; /* checked by unpacker */ LASSERT(rec->ur_opcode <= REINT_MAX && reinters[rec->ur_opcode] != NULL); push_ctxt(&saved, &obd->obd_lvfs_ctxt, &rec->ur_uc); rc = reinters[rec->ur_opcode] (rec, offset, req, lockh); pop_ctxt(&saved, &obd->obd_lvfs_ctxt, &rec->ur_uc); return rc; }