1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * Copyright (C) 2002, 2003 Cluster File Systems, Inc.
5 * Author: Phil Schwan <phil@clusterfs.com>
6 * Peter Braam <braam@clusterfs.com>
7 * Mike Shaver <shaver@clusterfs.com>
9 * This file is part of Lustre, http://www.lustre.org.
11 * Lustre is free software; you can redistribute it and/or
12 * modify it under the terms of version 2 of the GNU General Public
13 * License as published by the Free Software Foundation.
15 * Lustre is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with Lustre; if not, write to the Free Software
22 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 # define EXPORT_SYMTAB
28 #define DEBUG_SUBSYSTEM S_LOV
30 #include <linux/slab.h>
31 #include <linux/module.h>
32 #include <linux/init.h>
33 #include <linux/slab.h>
34 #include <linux/pagemap.h>
35 #include <asm/div64.h>
36 #include <linux/seq_file.h>
38 #include <liblustre.h>
41 #include <linux/obd_support.h>
42 #include <linux/lustre_lib.h>
43 #include <linux/lustre_net.h>
44 #include <linux/lustre_idl.h>
45 #include <linux/lustre_dlm.h>
46 #include <linux/lustre_mds.h>
47 #include <linux/obd_class.h>
48 #include <linux/obd_lov.h>
49 #include <linux/obd_ost.h>
50 #include <linux/lprocfs_status.h>
52 #include "lov_internal.h"
54 /* Add log records for each OSC that this object is striped over, and return
55 * cookies for each one. We _would_ have nice abstraction here, except that
56 * we need to keep cookies in stripe order, even if some are NULL, so that
57 * the right cookies are passed back to the right OSTs at the client side.
58 * Unset cookies should be all-zero (which will never occur naturally). */
59 static int lov_llog_origin_add(struct llog_ctxt *ctxt, struct llog_rec_hdr *rec,
60 void *buf, struct llog_cookie *logcookies,
61 int numcookies, void *data)
63 struct obd_device *obd = ctxt->loc_obd;
64 struct lov_obd *lov = &obd->u.lov;
65 struct lov_oinfo *loi;
66 struct llog_unlink_rec *lur;
67 struct lov_stripe_md *lsm = (struct lov_stripe_md *)buf;
71 OBD_ALLOC(lur, sizeof(*lur));
74 lur->lur_hdr.lrh_len = lur->lur_tail.lrt_len = sizeof(*lur);
75 lur->lur_hdr.lrh_type = MDS_UNLINK_REC;
77 LASSERT(logcookies && numcookies >= lsm->lsm_stripe_count);
79 for (i = 0,loi = lsm->lsm_oinfo; i < lsm->lsm_stripe_count; i++,loi++) {
80 struct obd_device *child =
81 lov->tgts[loi->loi_ost_idx].ltd_exp->exp_obd;
82 struct llog_ctxt *cctxt;
83 cctxt = llog_get_context(&child->obd_llogs, ctxt->loc_idx);
85 lur->lur_oid = loi->loi_id;
86 lur->lur_ogen = loi->loi_gr;
87 LASSERT(lsm->lsm_object_gr == loi->loi_gr);
88 rc += llog_add(cctxt, &lur->lur_hdr, NULL, logcookies + rc,
89 numcookies - rc, NULL);
91 OBD_FREE(lur, sizeof(*lur));
96 static int lov_llog_origin_connect(struct llog_ctxt *ctxt, int count,
97 struct llog_logid *logid,
98 struct llog_gen *gen, struct obd_uuid *uuid)
100 struct obd_device *obd = ctxt->loc_obd;
101 struct lov_obd *lov = &obd->u.lov;
102 struct lov_tgt_desc *tgt;
106 LASSERT(lov->desc.ld_tgt_count == count);
107 for (i = 0, tgt = lov->tgts; i < lov->desc.ld_tgt_count; i++, tgt++) {
108 struct obd_device *child;
109 struct llog_ctxt *cctxt;
113 child = tgt->ltd_exp->exp_obd;
115 cctxt = llog_get_context(&child->obd_llogs, ctxt->loc_idx);
116 if (uuid && !obd_uuid_equals(uuid, &lov->tgts[i].uuid))
119 rc = llog_connect(cctxt, 1, logid, gen, uuid);
121 CERROR("error osc_llog_connect %d\n", i);
129 /* the replicators commit callback */
130 static int lov_llog_repl_cancel(struct llog_ctxt *ctxt, int count,
131 struct llog_cookie *cookies, int flags,
134 struct lov_stripe_md *lsm = (struct lov_stripe_md *)data;
136 struct obd_device *obd = ctxt->loc_obd;
137 struct lov_oinfo *loi;
141 LASSERT(lsm != NULL);
142 LASSERT(count == lsm->lsm_stripe_count);
144 loi = lsm->lsm_oinfo;
146 for (i = 0; i < count; i++, cookies++, loi++) {
147 struct obd_device *child =
148 lov->tgts[loi->loi_ost_idx].ltd_exp->exp_obd;
149 struct llog_ctxt *cctxt;
152 cctxt = llog_get_context(&child->obd_llogs, ctxt->loc_idx);
153 err = llog_cancel(cctxt, 1, cookies, flags, NULL);
154 if (err && lov->tgts[loi->loi_ost_idx].active) {
155 CERROR("error: objid "LPX64" subobj "LPX64
156 " on OST idx %d: rc = %d\n", lsm->lsm_object_id,
157 loi->loi_id, loi->loi_ost_idx, err);
165 static struct llog_operations lov_unlink_orig_logops = {
166 lop_add: lov_llog_origin_add,
167 lop_connect: lov_llog_origin_connect
170 static struct llog_operations lov_size_repl_logops = {
171 lop_cancel: lov_llog_repl_cancel
174 int lov_llog_init(struct obd_device *obd, struct obd_llogs *llogs,
175 struct obd_device *tgt, int count, struct llog_catid *logid)
177 struct lov_obd *lov = &obd->u.lov;
178 struct lov_tgt_desc *ctgt;
182 rc = obd_llog_setup(obd, llogs, LLOG_UNLINK_ORIG_CTXT, tgt, 0, NULL,
183 &lov_unlink_orig_logops);
187 rc = obd_llog_setup(obd, llogs, LLOG_SIZE_REPL_CTXT, tgt, 0, NULL,
188 &lov_size_repl_logops);
192 LASSERT(lov->desc.ld_tgt_count == count);
193 for (i = 0, ctgt = lov->tgts; i < lov->desc.ld_tgt_count; i++, ctgt++) {
194 struct obd_device *child;
198 child = ctgt->ltd_exp->exp_obd;
199 rc = obd_llog_init(child, &child->obd_llogs, tgt, 1, logid + i);
201 CERROR("error osc_llog_init %d\n", i);
208 int lov_llog_finish(struct obd_device *obd, struct obd_llogs *llogs, int count)
210 struct lov_obd *lov = &obd->u.lov;
211 struct lov_tgt_desc *tgt;
215 rc = obd_llog_cleanup(llog_get_context(llogs, LLOG_UNLINK_ORIG_CTXT));
219 rc = obd_llog_cleanup(llog_get_context(llogs, LLOG_SIZE_REPL_CTXT));
223 if (lov->desc.ld_tgt_count != count) {
224 CERROR("LOV tgt count != passed tgt count (%d != %d)\n",
225 lov->desc.ld_tgt_count, count);
226 count = MIN(lov->desc.ld_tgt_count, count);
228 for (i = 0, tgt = lov->tgts; i < count; i++, tgt++) {
229 struct obd_device *child;
233 child = tgt->ltd_exp->exp_obd;
234 rc = obd_llog_finish(child, &child->obd_llogs, 1);
236 CERROR("osc_llog_finish error; index=%d; rc=%d\n",