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"
55 static int lov_logop_cleanup(struct llog_ctxt *ctxt)
57 struct lov_obd *lov = &ctxt->loc_obd->u.lov;
61 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
62 struct obd_device *child = lov->tgts[i].ltd_exp->exp_obd;
63 struct llog_ctxt *cctxt = llog_get_context(child, ctxt->loc_idx);
64 rc = llog_cleanup(cctxt);
66 CERROR("error lov_llog_open %d\n", i);
74 /* Add log records for each OSC that this object is striped over, and return
75 * cookies for each one. We _would_ have nice abstraction here, except that
76 * we need to keep cookies in stripe order, even if some are NULL, so that
77 * the right cookies are passed back to the right OSTs at the client side.
78 * Unset cookies should be all-zero (which will never occur naturally). */
79 static int lov_llog_origin_add(struct llog_ctxt *ctxt,
80 struct llog_rec_hdr *rec, struct lov_stripe_md *lsm,
81 struct llog_cookie *logcookies, int numcookies)
83 struct obd_device *obd = ctxt->loc_obd;
84 struct lov_obd *lov = &obd->u.lov;
85 struct lov_oinfo *loi;
86 struct llog_unlink_rec *lur;
90 OBD_ALLOC(lur, sizeof(*lur));
93 lur->lur_hdr.lrh_len = lur->lur_tail.lrt_len = sizeof(*lur);
94 lur->lur_hdr.lrh_type = MDS_UNLINK_REC;
96 LASSERT(logcookies && numcookies >= lsm->lsm_stripe_count);
98 for (i = 0,loi = lsm->lsm_oinfo; i < lsm->lsm_stripe_count; i++,loi++) {
99 struct obd_device *child = lov->tgts[loi->loi_ost_idx].ltd_exp->exp_obd;
100 struct llog_ctxt *cctxt = llog_get_context(child, ctxt->loc_idx);
102 lur->lur_oid = loi->loi_id;
103 lur->lur_ogen = loi->loi_gr;
104 rc += llog_add(cctxt, &lur->lur_hdr, NULL, logcookies + rc, numcookies - rc);
107 OBD_FREE(lur, sizeof(*lur));
112 static int lov_llog_origin_connect(struct llog_ctxt *ctxt, int count,
113 struct llog_logid *logid,
114 struct llog_ctxt_gen *gen)
116 struct obd_device *obd = ctxt->loc_obd;
117 struct lov_obd *lov = &obd->u.lov;
121 LASSERT(lov->desc.ld_tgt_count == count);
122 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
123 struct obd_device *child = lov->tgts[i].ltd_exp->exp_obd;
124 struct llog_ctxt *cctxt = llog_get_context(child, ctxt->loc_idx);
125 rc = llog_connect(cctxt, 1, logid, gen);
127 CERROR("error osc_llog_connect %d\n", i);
135 /* the replicators commit callback */
136 static int lov_llog_repl_cancel(struct llog_ctxt *ctxt, struct lov_stripe_md *lsm,
137 int count, struct llog_cookie *cookies, int flags)
140 struct obd_device *obd = ctxt->loc_obd;
141 struct lov_oinfo *loi;
145 LASSERT(lsm != NULL);
146 LASSERT(count == lsm->lsm_stripe_count);
148 loi = lsm->lsm_oinfo;
150 for (i = 0; i < count; i++, cookies++, loi++) {
151 struct obd_device *child = lov->tgts[loi->loi_ost_idx].ltd_exp->exp_obd;
152 struct llog_ctxt *cctxt = llog_get_context(child, ctxt->loc_idx);
155 err = llog_cancel(cctxt, NULL, 1, cookies, flags);
156 if (err && lov->tgts[loi->loi_ost_idx].active) {
157 CERROR("error: objid "LPX64" subobj "LPX64
158 " on OST idx %d: rc = %d\n", lsm->lsm_object_id,
159 loi->loi_id, loi->loi_ost_idx, err);
167 static struct llog_operations lov_unlink_orig_logops = {
168 lop_add: lov_llog_origin_add,
169 lop_connect: lov_llog_origin_connect
172 static struct llog_operations lov_size_repl_logops = {
173 lop_cancel: lov_llog_repl_cancel
177 int lov_llog_init(struct obd_device *obd, struct obd_device *tgt,
178 int count, struct llog_logid *logid)
180 struct lov_obd *lov = &obd->u.lov;
184 rc = llog_setup(obd, LLOG_UNLINK_ORIG_CTXT, tgt, 0, NULL,
185 &lov_unlink_orig_logops);
189 rc = llog_setup(obd, LLOG_SIZE_REPL_CTXT, tgt, 0, NULL,
190 &lov_size_repl_logops);
194 LASSERT(lov->desc.ld_tgt_count == count);
195 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
196 struct obd_device *child = lov->tgts[i].ltd_exp->exp_obd;
197 rc = obd_llog_init(child, tgt, 1, logid + i);
199 CERROR("error osc_llog_init %d\n", i);
206 int lov_llog_finish(struct obd_device *obd, int count)
208 struct lov_obd *lov = &obd->u.lov;
212 rc = llog_cleanup(llog_get_context(obd, LLOG_UNLINK_ORIG_CTXT));
216 rc = llog_cleanup(llog_get_context(obd, LLOG_SIZE_REPL_CTXT));
220 LASSERT(lov->desc.ld_tgt_count == count);
221 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
222 struct obd_device *child = lov->tgts[i].ltd_exp->exp_obd;
223 rc = obd_llog_finish(child, 1);
225 CERROR("error osc_llog_finish %d\n", i);