/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*- * vim:expandtab:shiftwidth=8:tabstop=8: * * linux/fs/obdfilter/filter_log.c * * Copyright (c) 2001-2003 Cluster File Systems, Inc. * Author: Peter Braam * Author: Andreas Dilger * Author: Phil Schwan * * This file is part of the Lustre file system, http://www.lustre.org * Lustre is a trademark of Cluster File Systems, Inc. * * You may have signed or agreed to another license before downloading * this software. If so, you are bound by the terms and conditions * of that agreement, and the following does not apply to you. See the * LICENSE file included with this distribution for more information. * * If you did not agree to a different license, then this copy of Lustre * is open source 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. * * In either case, 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 * license text for more details. */ #define DEBUG_SUBSYSTEM S_FILTER #ifdef HAVE_KERNEL_CONFIG_H #include #endif #include #include #include #include #include #include #include "filter_internal.h" int filter_log_sz_change(struct llog_handle *cathandle, struct ll_fid *mds_fid, __u32 io_epoch, struct llog_cookie *logcookie, struct inode *inode) { struct llog_size_change_rec *lsc; int rc; struct ost_filterdata *ofd; ENTRY; LOCK_INODE_MUTEX(inode); ofd = inode->i_filterdata; if (ofd && ofd->ofd_epoch >= io_epoch) { if (ofd->ofd_epoch > io_epoch) CERROR("client sent old epoch %d for obj ino %ld\n", io_epoch, inode->i_ino); UNLOCK_INODE_MUTEX(inode); RETURN(0); } if (ofd && ofd->ofd_epoch < io_epoch) { ofd->ofd_epoch = io_epoch; } else if (!ofd) { OBD_ALLOC(ofd, sizeof(*ofd)); if (!ofd) GOTO(out, rc = -ENOMEM); igrab(inode); inode->i_filterdata = ofd; ofd->ofd_epoch = io_epoch; } /* the decision to write a record is now made, unlock */ UNLOCK_INODE_MUTEX(inode); OBD_ALLOC(lsc, sizeof(*lsc)); if (lsc == NULL) RETURN(-ENOMEM); lsc->lsc_hdr.lrh_len = lsc->lsc_tail.lrt_len = sizeof(*lsc); lsc->lsc_hdr.lrh_type = OST_SZ_REC; lsc->lsc_fid = *mds_fid; lsc->lsc_io_epoch = io_epoch; rc = llog_cat_add_rec(cathandle, &lsc->lsc_hdr, logcookie, NULL); OBD_FREE(lsc, sizeof(*lsc)); if (rc > 0) { LASSERT(rc == sizeof(*logcookie)); rc = 0; } out: RETURN(rc); } /* When this (destroy) operation is committed, return the cancel cookie */ void filter_cancel_cookies_cb(struct obd_device *obd, __u64 transno, void *cb_data, int error) { struct llog_cookie *cookie = cb_data; int rc; if (error != 0) { CDEBUG(D_INODE, "not cancelling llog cookie on error %d\n", error); return; } rc = llog_cancel(llog_get_context(obd, cookie->lgc_subsys + 1), NULL, 1, cookie, 0); if (rc) CERROR("error cancelling log cookies: rc = %d\n", rc); OBD_FREE(cookie, sizeof(*cookie)); } /* Callback for processing the unlink log record received from MDS by * llog_client_api. */ static int filter_recov_log_unlink_cb(struct llog_ctxt *ctxt, struct llog_rec_hdr *rec, struct llog_cookie *cookie) { struct obd_device *obd = ctxt->loc_obd; struct obd_export *exp = obd->obd_self_export; struct llog_unlink_rec *lur; struct obdo *oa; obd_id oid; int rc = 0; ENTRY; lur = (struct llog_unlink_rec *)rec; oa = obdo_alloc(); if (oa == NULL) RETURN(-ENOMEM); oa->o_valid |= OBD_MD_FLCOOKIE; oa->o_id = lur->lur_oid; oa->o_gr = lur->lur_ogen; memcpy(obdo_logcookie(oa), cookie, sizeof(*cookie)); oid = oa->o_id; rc = filter_destroy(exp, oa, NULL, NULL, NULL); obdo_free(oa); if (rc == -ENOENT) { CDEBUG(D_HA, "object already removed, send cookie\n"); llog_cancel(ctxt, NULL, 1, cookie, 0); RETURN(0); } if (rc == 0) CDEBUG(D_HA, "object: "LPU64" in record is destroyed\n", oid); RETURN(rc); } /* Callback for processing the setattr log record received from MDS by * llog_client_api. */ static int filter_recov_log_setattr_cb(struct llog_ctxt *ctxt, struct llog_rec_hdr *rec, struct llog_cookie *cookie) { struct obd_device *obd = ctxt->loc_obd; struct obd_export *exp = obd->obd_self_export; struct llog_setattr_rec *lsr; struct obd_info oinfo = { { { 0 } } }; obd_id oid; int rc = 0; ENTRY; lsr = (struct llog_setattr_rec *)rec; oinfo.oi_oa = obdo_alloc(); oinfo.oi_oa->o_valid |= (OBD_MD_FLID | OBD_MD_FLUID | OBD_MD_FLGID | OBD_MD_FLCOOKIE); oinfo.oi_oa->o_id = lsr->lsr_oid; oinfo.oi_oa->o_gr = lsr->lsr_ogen; oinfo.oi_oa->o_uid = lsr->lsr_uid; oinfo.oi_oa->o_gid = lsr->lsr_gid; memcpy(obdo_logcookie(oinfo.oi_oa), cookie, sizeof(*cookie)); oid = oinfo.oi_oa->o_id; rc = filter_setattr(exp, &oinfo, NULL); obdo_free(oinfo.oi_oa); if (rc == -ENOENT) { CDEBUG(D_HA, "object already removed, send cookie\n"); llog_cancel(ctxt, NULL, 1, cookie, 0); RETURN(0); } if (rc == 0) CDEBUG(D_HA, "object: "LPU64" in record is chown/chgrp\n", oid); RETURN(rc); } int filter_recov_log_mds_ost_cb(struct llog_handle *llh, struct llog_rec_hdr *rec, void *data) { struct llog_ctxt *ctxt = llh->lgh_ctxt; struct llog_cookie cookie; int rc = 0; ENTRY; if (!(llh->lgh_hdr->llh_flags & LLOG_F_IS_PLAIN)) { CERROR("log is not plain\n"); RETURN(-EINVAL); } cookie.lgc_lgl = llh->lgh_id; cookie.lgc_subsys = LLOG_MDS_OST_ORIG_CTXT; cookie.lgc_index = rec->lrh_index; switch (rec->lrh_type) { case MDS_UNLINK_REC: rc = filter_recov_log_unlink_cb(ctxt, rec, &cookie); break; case MDS_SETATTR_REC: rc = filter_recov_log_setattr_cb(ctxt, rec, &cookie); break; case LLOG_GEN_REC: { struct llog_gen_rec *lgr = (struct llog_gen_rec *)rec; if (llog_gen_lt(lgr->lgr_gen, ctxt->loc_gen)) rc = 0; else rc = LLOG_PROC_BREAK; CDEBUG(D_HA, "fetch generation log, send cookie\n"); llog_cancel(ctxt, NULL, 1, &cookie, 0); RETURN(rc); } break; default: CERROR("log record type %08x unknown\n", rec->lrh_type); RETURN(-EINVAL); break; } RETURN(rc); }