--- /dev/null
+/*
+ * GPL HEADER START
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 only,
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License version 2 for more details (a copy is included
+ * in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License
+ * version 2 along with this program; If not, see
+ * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ * GPL HEADER END
+ */
+/*
+ * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Use is subject to license terms.
+ *
+ * Copyright (c) 2011, 2012, Whamcloud, Inc.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Sun Microsystems, Inc.
+ *
+ * lustre/ofd/ofd_io.c
+ *
+ * Author: Alex Tomas <bzzz@whamcloud.com>
+ */
+
+#define DEBUG_SUBSYSTEM S_FILTER
+
+#include "ofd_internal.h"
+
+static int ofd_preprw_read(const struct lu_env *env, struct ofd_device *ofd,
+ struct lu_fid *fid, struct lu_attr *la, int niocount,
+ struct niobuf_remote *rnb, int *nr_local,
+ struct niobuf_local *lnb)
+{
+ struct ofd_object *fo;
+ int i, j, rc, tot_bytes = 0;
+
+ ENTRY;
+ LASSERT(env != NULL);
+
+ fo = ofd_object_find(env, ofd, fid);
+ if (IS_ERR(fo))
+ RETURN(PTR_ERR(fo));
+ LASSERT(fo != NULL);
+
+ ofd_read_lock(env, fo);
+ if (!ofd_object_exists(fo))
+ GOTO(unlock, rc = -ENOENT);
+
+ /* parse remote buffers to local buffers and prepare the latter */
+ for (i = 0, j = 0; i < niocount; i++) {
+ rc = dt_bufs_get(env, ofd_object_child(fo), rnb + i,
+ lnb + j, 0, ofd_object_capa(env, fo));
+ LASSERT(rc > 0);
+ LASSERT(rc <= PTLRPC_MAX_BRW_PAGES);
+ /* correct index for local buffers to continue with */
+ j += rc;
+ LASSERT(j <= PTLRPC_MAX_BRW_PAGES);
+ tot_bytes += rnb[i].rnb_len;
+ }
+
+ *nr_local = j;
+ LASSERT(*nr_local > 0 && *nr_local <= PTLRPC_MAX_BRW_PAGES);
+ rc = dt_attr_get(env, ofd_object_child(fo), la,
+ ofd_object_capa(env, fo));
+ if (unlikely(rc))
+ GOTO(buf_put, rc);
+
+ rc = dt_read_prep(env, ofd_object_child(fo), lnb, *nr_local);
+ if (unlikely(rc))
+ GOTO(buf_put, rc);
+ lprocfs_counter_add(ofd_obd(ofd)->obd_stats,
+ LPROC_OFD_READ_BYTES, tot_bytes);
+ RETURN(0);
+
+buf_put:
+ dt_bufs_put(env, ofd_object_child(fo), lnb, *nr_local);
+unlock:
+ ofd_read_unlock(env, fo);
+ ofd_object_put(env, fo);
+ return rc;
+}
+
+static int ofd_preprw_write(const struct lu_env *env, struct obd_export *exp,
+ struct ofd_device *ofd, struct lu_fid *fid,
+ struct lu_attr *la, struct obdo *oa,
+ int objcount, struct obd_ioobj *obj,
+ struct niobuf_remote *rnb, int *nr_local,
+ struct niobuf_local *lnb,
+ struct obd_trans_info *oti)
+{
+ struct ofd_object *fo;
+ int i, j, k, rc = 0, tot_bytes = 0;
+
+ ENTRY;
+ LASSERT(env != NULL);
+ LASSERT(objcount == 1);
+
+ if (unlikely(exp->exp_obd->obd_recovering)) {
+ struct ofd_thread_info *info = ofd_info(env);
+
+ /* copied from ofd_precreate_object */
+ /* XXX this should be consolidated to use the same code
+ * instead of a copy, due to the ongoing risk of bugs. */
+ memset(&info->fti_attr, 0, sizeof(info->fti_attr));
+ info->fti_attr.la_valid = LA_TYPE | LA_MODE;
+ info->fti_attr.la_mode = S_IFREG | S_ISUID | S_ISGID | 0666;
+ info->fti_attr.la_valid |= LA_ATIME | LA_MTIME | LA_CTIME;
+ /* Initialize a/c/m time so any client timestamp will always
+ * be newer and update the inode. ctime = 0 is also handled
+ * specially in osd_inode_setattr(). See LU-221, LU-1042 */
+ info->fti_attr.la_atime = 0;
+ info->fti_attr.la_mtime = 0;
+ info->fti_attr.la_ctime = 0;
+
+ fo = ofd_object_find_or_create(env, ofd, fid, &info->fti_attr);
+ } else {
+ fo = ofd_object_find(env, ofd, fid);
+ }
+
+ if (IS_ERR(fo))
+ GOTO(out, rc = PTR_ERR(fo));
+ LASSERT(fo != NULL);
+
+ ofd_read_lock(env, fo);
+ if (!ofd_object_exists(fo)) {
+ CERROR("%s: BRW to missing obj "LPU64"/"LPU64"\n",
+ exp->exp_obd->obd_name, obj->ioo_id, obj->ioo_seq);
+ ofd_read_unlock(env, fo);
+ ofd_object_put(env, fo);
+ GOTO(out, rc = -ENOENT);
+ }
+
+ /* Always sync if syncjournal parameter is set */
+ oti->oti_sync_write = ofd->ofd_syncjournal;
+
+ /* Process incoming grant info, set OBD_BRW_GRANTED flag and grant some
+ * space back if possible */
+ ofd_grant_prepare_write(env, exp, oa, rnb, obj->ioo_bufcnt);
+
+ /* parse remote buffers to local buffers and prepare the latter */
+ for (i = 0, j = 0; i < obj->ioo_bufcnt; i++) {
+ rc = dt_bufs_get(env, ofd_object_child(fo),
+ rnb + i, lnb + j, 1,
+ ofd_object_capa(env, fo));
+ LASSERT(rc > 0);
+ LASSERT(rc <= PTLRPC_MAX_BRW_PAGES);
+ /* correct index for local buffers to continue with */
+ for (k = 0; k < rc; k++) {
+ lnb[j+k].lnb_flags = rnb[i].rnb_flags;
+ if (!(rnb[i].rnb_flags & OBD_BRW_GRANTED))
+ lnb[j+k].lnb_rc = -ENOSPC;
+ if (!(rnb[i].rnb_flags & OBD_BRW_ASYNC))
+ oti->oti_sync_write = 1;
+ }
+ j += rc;
+ LASSERT(j <= PTLRPC_MAX_BRW_PAGES);
+ tot_bytes += rnb[i].rnb_len;
+ }
+ *nr_local = j;
+ LASSERT(*nr_local > 0 && *nr_local <= PTLRPC_MAX_BRW_PAGES);
+
+ lprocfs_counter_add(ofd_obd(ofd)->obd_stats,
+ LPROC_OFD_WRITE_BYTES, tot_bytes);
+ rc = dt_write_prep(env, ofd_object_child(fo), lnb, *nr_local);
+ if (unlikely(rc != 0)) {
+ dt_bufs_put(env, ofd_object_child(fo), lnb, *nr_local);
+ ofd_read_unlock(env, fo);
+ /* ofd_grant_prepare_write() was called, so we must commit */
+ ofd_grant_commit(env, exp, rc);
+ }
+
+ RETURN(rc);
+out:
+ /* let's still process incoming grant information packed in the oa,
+ * but without enforcing grant since we won't proceed with the write.
+ * Just like a read request actually. */
+ ofd_grant_prepare_read(env, exp, oa);
+ RETURN(rc);
+}
+
+int ofd_preprw(const struct lu_env* env, int cmd, struct obd_export *exp,
+ struct obdo *oa, int objcount, struct obd_ioobj *obj,
+ struct niobuf_remote *rnb, int *nr_local,
+ struct niobuf_local *lnb, struct obd_trans_info *oti,
+ struct lustre_capa *capa)
+{
+ struct ofd_device *ofd = ofd_exp(exp);
+ struct ofd_thread_info *info;
+ int rc = 0;
+
+ if (OBD_FAIL_CHECK(OBD_FAIL_OST_ENOENT) &&
+ ofd->ofd_destroys_in_progress == 0) {
+ /* don't fail lookups for orphan recovery, it causes
+ * later LBUGs when objects still exist during precreate */
+ CDEBUG(D_INFO, "*** obd_fail_loc=%x ***\n",OBD_FAIL_OST_ENOENT);
+ RETURN(-ENOENT);
+ }
+
+ info = ofd_info_init(env, exp);
+
+ LASSERT(objcount == 1);
+ LASSERT(obj->ioo_bufcnt > 0);
+
+ fid_ostid_unpack(&info->fti_fid, &oa->o_oi, 0);
+ if (cmd == OBD_BRW_WRITE) {
+ rc = ofd_auth_capa(exp, &info->fti_fid, oa->o_seq,
+ capa, CAPA_OPC_OSS_WRITE);
+ if (rc == 0) {
+ LASSERT(oa != NULL);
+ la_from_obdo(&info->fti_attr, oa, OBD_MD_FLGETATTR);
+ rc = ofd_preprw_write(env, exp, ofd, &info->fti_fid,
+ &info->fti_attr, oa, objcount,
+ obj, rnb, nr_local, lnb, oti);
+ }
+ } else if (cmd == OBD_BRW_READ) {
+ rc = ofd_auth_capa(exp, &info->fti_fid, oa->o_seq,
+ capa, CAPA_OPC_OSS_READ);
+ if (rc == 0) {
+ ofd_grant_prepare_read(env, exp, oa);
+ rc = ofd_preprw_read(env, ofd, &info->fti_fid,
+ &info->fti_attr, obj->ioo_bufcnt,
+ rnb, nr_local, lnb);
+ obdo_from_la(oa, &info->fti_attr, LA_ATIME);
+ }
+ } else {
+ CERROR("%s: wrong cmd %d received!\n",
+ exp->exp_obd->obd_name, cmd);
+ rc = -EPROTO;
+ }
+ RETURN(rc);
+}
+
+static int
+ofd_commitrw_read(const struct lu_env *env, struct ofd_device *ofd,
+ struct lu_fid *fid, int objcount, int niocount,
+ struct niobuf_local *lnb)
+{
+ struct ofd_object *fo;
+
+ ENTRY;
+
+ LASSERT(niocount > 0);
+
+ fo = ofd_object_find(env, ofd, fid);
+ if (IS_ERR(fo))
+ RETURN(PTR_ERR(fo));
+ LASSERT(fo != NULL);
+ LASSERT(ofd_object_exists(fo));
+ dt_bufs_put(env, ofd_object_child(fo), lnb, niocount);
+
+ ofd_read_unlock(env, fo);
+ ofd_object_put(env, fo);
+ /* second put is pair to object_get in ofd_preprw_read */
+ ofd_object_put(env, fo);
+
+ RETURN(0);
+}
+
+static int
+ofd_write_attr_set(const struct lu_env *env, struct ofd_device *ofd,
+ struct ofd_object *ofd_obj, struct lu_attr *la,
+ struct filter_fid *ff)
+{
+ struct ofd_thread_info *info = ofd_info(env);
+ __u64 valid = la->la_valid;
+ int rc;
+ struct thandle *th;
+ struct dt_object *dt_obj;
+ int ff_needed = 0;
+
+ ENTRY;
+
+ LASSERT(la);
+
+ dt_obj = ofd_object_child(ofd_obj);
+ LASSERT(dt_obj != NULL);
+
+ la->la_valid &= LA_UID | LA_GID;
+
+ rc = ofd_attr_handle_ugid(env, ofd_obj, la, 0 /* !is_setattr */);
+ if (rc != 0)
+ GOTO(out, rc);
+
+ if (ff != NULL) {
+ rc = ofd_object_ff_check(env, ofd_obj);
+ if (rc == -ENODATA)
+ ff_needed = 1;
+ else if (rc < 0)
+ GOTO(out, rc);
+ }
+
+ if (!la->la_valid && !ff_needed)
+ /* no attributes to set */
+ GOTO(out, rc = 0);
+
+ th = ofd_trans_create(env, ofd);
+ if (IS_ERR(th))
+ GOTO(out, rc = PTR_ERR(th));
+
+ if (la->la_valid) {
+ rc = dt_declare_attr_set(env, dt_obj, la, th);
+ if (rc)
+ GOTO(out_tx, rc);
+ }
+
+ if (ff_needed) {
+ info->fti_buf.lb_buf = ff;
+ info->fti_buf.lb_len = sizeof(*ff);
+ rc = dt_declare_xattr_set(env, dt_obj, &info->fti_buf,
+ XATTR_NAME_FID, 0, th);
+ if (rc)
+ GOTO(out_tx, rc);
+ }
+
+ /* We don't need a transno for this operation which will be re-executed
+ * anyway when the OST_WRITE (with a transno assigned) is replayed */
+ rc = dt_trans_start_local(env, ofd->ofd_osd , th);
+ if (rc)
+ GOTO(out_tx, rc);
+
+ /* set uid/gid */
+ if (la->la_valid) {
+ rc = dt_attr_set(env, dt_obj, la, th,
+ ofd_object_capa(env, ofd_obj));
+ if (rc)
+ GOTO(out_tx, rc);
+ }
+
+ /* set filter fid EA */
+ if (ff_needed) {
+ rc = dt_xattr_set(env, dt_obj, &info->fti_buf, XATTR_NAME_FID,
+ 0, th, BYPASS_CAPA);
+ if (rc)
+ GOTO(out_tx, rc);
+ }
+
+ EXIT;
+out_tx:
+ dt_trans_stop(env, ofd->ofd_osd, th);
+out:
+ la->la_valid = valid;
+ return rc;
+}
+
+static int
+ofd_commitrw_write(const struct lu_env *env, struct ofd_device *ofd,
+ struct lu_fid *fid, struct lu_attr *la,
+ struct filter_fid *ff, int objcount,
+ int niocount, struct niobuf_local *lnb,
+ struct obd_trans_info *oti, int old_rc)
+{
+ struct ofd_thread_info *info = ofd_info(env);
+ struct ofd_object *fo;
+ struct dt_object *o;
+ struct thandle *th;
+ int rc = 0;
+ int retries = 0;
+
+ ENTRY;
+
+ LASSERT(objcount == 1);
+
+ fo = ofd_object_find(env, ofd, fid);
+ LASSERT(fo != NULL);
+ LASSERT(ofd_object_exists(fo));
+
+ o = ofd_object_child(fo);
+ LASSERT(o != NULL);
+
+ if (old_rc)
+ GOTO(out, rc = old_rc);
+
+ /*
+ * The first write to each object must set some attributes. It is
+ * important to set the uid/gid before calling
+ * dt_declare_write_commit() since quota enforcement is now handled in
+ * declare phases.
+ */
+ rc = ofd_write_attr_set(env, ofd, fo, la, ff);
+ if (rc)
+ GOTO(out, rc);
+
+ la->la_valid &= LA_ATIME | LA_MTIME | LA_CTIME;
+
+retry:
+ th = ofd_trans_create(env, ofd);
+ if (IS_ERR(th))
+ GOTO(out, rc = PTR_ERR(th));
+
+ th->th_sync |= oti->oti_sync_write;
+
+ rc = dt_declare_write_commit(env, o, lnb, niocount, th);
+ if (rc)
+ GOTO(out_stop, rc);
+
+ if (la->la_valid) {
+ /* update [mac]time if needed */
+ rc = dt_declare_attr_set(env, o, la, th);
+ if (rc)
+ GOTO(out_stop, rc);
+ }
+
+ rc = ofd_trans_start(env, ofd, fo, th);
+ if (rc)
+ GOTO(out_stop, rc);
+
+ rc = dt_write_commit(env, o, lnb, niocount, th);
+ if (rc)
+ GOTO(out_stop, rc);
+
+ if (la->la_valid) {
+ rc = dt_attr_set(env, o, la, th, ofd_object_capa(env, fo));
+ if (rc)
+ GOTO(out_stop, rc);
+ }
+
+ /* get attr to return */
+ dt_attr_get(env, o, la, ofd_object_capa(env, fo));
+
+out_stop:
+ /* Force commit to make the just-deleted blocks
+ * reusable. LU-456 */
+ if (rc == -ENOSPC)
+ th->th_sync = 1;
+
+ ofd_trans_stop(env, ofd, th, rc);
+ if (rc == -ENOSPC && retries++ < 3) {
+ CDEBUG(D_INODE, "retry after force commit, retries:%d\n",
+ retries);
+ goto retry;
+ }
+
+out:
+ dt_bufs_put(env, o, lnb, niocount);
+ ofd_read_unlock(env, fo);
+ ofd_object_put(env, fo);
+ /* second put is pair to object_get in ofd_preprw_write */
+ ofd_object_put(env, fo);
+ ofd_grant_commit(env, info->fti_exp, old_rc);
+ RETURN(rc);
+}
+
+int ofd_commitrw(const struct lu_env *env, int cmd, struct obd_export *exp,
+ struct obdo *oa, int objcount, struct obd_ioobj *obj,
+ struct niobuf_remote *rnb, int npages,
+ struct niobuf_local *lnb, struct obd_trans_info *oti,
+ int old_rc)
+{
+ struct ofd_thread_info *info;
+ struct ofd_mod_data *fmd;
+ __u64 valid;
+ struct ofd_device *ofd = ofd_exp(exp);
+ struct filter_fid *ff = NULL;
+ int rc = 0;
+
+ info = ofd_info(env);
+ ofd_oti2info(info, oti);
+
+ LASSERT(npages > 0);
+
+ fid_ostid_unpack(&info->fti_fid, &oa->o_oi, 0);
+ if (cmd == OBD_BRW_WRITE) {
+ /* Don't update timestamps if this write is older than a
+ * setattr which modifies the timestamps. b=10150 */
+
+ /* XXX when we start having persistent reservations this needs
+ * to be changed to ofd_fmd_get() to create the fmd if it
+ * doesn't already exist so we can store the reservation handle
+ * there. */
+ valid = OBD_MD_FLUID | OBD_MD_FLGID;
+ fmd = ofd_fmd_find(exp, &info->fti_fid);
+ if (!fmd || fmd->fmd_mactime_xid < info->fti_xid)
+ valid |= OBD_MD_FLATIME | OBD_MD_FLMTIME |
+ OBD_MD_FLCTIME;
+ ofd_fmd_put(exp, fmd);
+ la_from_obdo(&info->fti_attr, oa, valid);
+
+ if (oa->o_valid & OBD_MD_FLFID) {
+ ff = &info->fti_mds_fid;
+ ofd_prepare_fidea(ff, oa);
+ }
+
+ rc = ofd_commitrw_write(env, ofd, &info->fti_fid,
+ &info->fti_attr, ff, objcount, npages,
+ lnb, oti, old_rc);
+ if (rc == 0)
+ obdo_from_la(oa, &info->fti_attr,
+ OFD_VALID_FLAGS | LA_GID | LA_UID);
+ else
+ obdo_from_la(oa, &info->fti_attr, LA_GID | LA_UID);
+
+ if (ofd_grant_prohibit(exp, ofd))
+ /* Trick to prevent clients from waiting for bulk write
+ * in flight since they won't get any grant in the reply
+ * anyway so they had better firing the sync write RPC
+ * straight away */
+ oa->o_valid |= OBD_MD_FLUSRQUOTA | OBD_MD_FLGRPQUOTA;
+ } else if (cmd == OBD_BRW_READ) {
+ struct ldlm_namespace *ns = ofd->ofd_namespace;
+
+ /* If oa != NULL then ofd_preprw_read updated the inode
+ * atime and we should update the lvb so that other glimpses
+ * will also get the updated value. bug 5972 */
+ if (oa && ns && ns->ns_lvbo && ns->ns_lvbo->lvbo_update) {
+ struct ldlm_resource *rs = NULL;
+
+ ofd_build_resid(&info->fti_fid, &info->fti_resid);
+ rs = ldlm_resource_get(ns, NULL, &info->fti_resid,
+ LDLM_EXTENT, 0);
+ if (rs != NULL) {
+ ns->ns_lvbo->lvbo_update(rs, NULL, 1);
+ ldlm_resource_putref(rs);
+ }
+ }
+ rc = ofd_commitrw_read(env, ofd, &info->fti_fid, objcount,
+ npages, lnb);
+ if (old_rc)
+ rc = old_rc;
+ } else {
+ LBUG();
+ rc = -EPROTO;
+ }
+
+ ofd_info2oti(info, oti);
+ RETURN(rc);
+}
git://git.whamcloud.com / fs / lustre-release.git / commitdiff