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,
60 struct llog_rec_hdr *rec, struct lov_stripe_md *lsm,
61 struct llog_cookie *logcookies, int numcookies,
62 llog_fill_rec_cb_t fill_cb)
64 struct obd_device *obd = ctxt->loc_obd;
65 struct lov_obd *lov = &obd->u.lov;
66 struct lov_oinfo *loi;
70 LASSERT(logcookies && numcookies >= lsm->lsm_stripe_count);
72 for (i = 0,loi = lsm->lsm_oinfo; i < lsm->lsm_stripe_count; i++,loi++) {
73 struct obd_device *child = lov->tgts[loi->loi_ost_idx].ltd_exp->exp_obd;
74 struct llog_ctxt *cctxt = llog_get_context(child, ctxt->loc_idx);
75 struct llog_fill_rec_data data;
77 /* fill mds unlink/setattr log record */
78 data.lfd_id = loi->loi_id;
79 data.lfd_ogen = loi->loi_gr;
82 rc += llog_add(cctxt, rec, NULL, logcookies + rc,
83 numcookies - rc, fill_cb);
90 static int lov_llog_origin_connect(struct llog_ctxt *ctxt, int count,
91 struct llog_logid *logid,
93 struct obd_uuid *uuid)
95 struct obd_device *obd = ctxt->loc_obd;
96 struct lov_obd *lov = &obd->u.lov;
97 struct lov_tgt_desc *tgt;
101 LASSERT(lov->desc.ld_tgt_count == count);
102 for (i = 0, tgt = lov->tgts; i < lov->desc.ld_tgt_count; i++, tgt++) {
103 struct obd_device *child;
104 struct llog_ctxt *cctxt;
108 child = tgt->ltd_exp->exp_obd;
109 cctxt = llog_get_context(child, ctxt->loc_idx);
110 if (uuid && !obd_uuid_equals(uuid, &lov->tgts[i].uuid))
113 rc = llog_connect(cctxt, 1, logid, gen, uuid);
115 CERROR("error osc_llog_connect %d\n", i);
123 /* the replicators commit callback */
124 static int lov_llog_repl_cancel(struct llog_ctxt *ctxt, struct lov_stripe_md *lsm,
125 int count, struct llog_cookie *cookies, int flags)
128 struct obd_device *obd = ctxt->loc_obd;
129 struct lov_oinfo *loi;
133 LASSERT(lsm != NULL);
134 LASSERT(count == lsm->lsm_stripe_count);
136 loi = lsm->lsm_oinfo;
138 for (i = 0; i < count; i++, cookies++, loi++) {
139 struct obd_device *child = lov->tgts[loi->loi_ost_idx].ltd_exp->exp_obd;
140 struct llog_ctxt *cctxt = llog_get_context(child, ctxt->loc_idx);
143 err = llog_cancel(cctxt, NULL, 1, cookies, flags);
144 if (err && lov->tgts[loi->loi_ost_idx].active) {
145 CERROR("error: objid "LPX64" subobj "LPX64
146 " on OST idx %d: rc = %d\n", lsm->lsm_object_id,
147 loi->loi_id, loi->loi_ost_idx, err);
155 static struct llog_operations lov_mds_ost_orig_logops = {
156 lop_add: lov_llog_origin_add,
157 lop_connect: lov_llog_origin_connect
160 static struct llog_operations lov_size_repl_logops = {
161 lop_cancel: lov_llog_repl_cancel
164 int lov_llog_init(struct obd_device *obd, struct obd_device *tgt,
165 int count, struct llog_catid *logid)
167 struct lov_obd *lov = &obd->u.lov;
168 struct lov_tgt_desc *ctgt;
172 rc = llog_setup(obd, LLOG_MDS_OST_ORIG_CTXT, tgt, 0, NULL,
173 &lov_mds_ost_orig_logops);
177 rc = llog_setup(obd, LLOG_SIZE_REPL_CTXT, tgt, 0, NULL,
178 &lov_size_repl_logops);
182 LASSERT(lov->desc.ld_tgt_count == count);
183 for (i = 0, ctgt = lov->tgts; i < lov->desc.ld_tgt_count; i++, ctgt++) {
184 struct obd_device *child;
187 child = ctgt->ltd_exp->exp_obd;
188 rc = obd_llog_init(child, tgt, 1, logid + i);
190 CERROR("error osc_llog_init %d\n", i);
197 int lov_llog_finish(struct obd_device *obd, int count)
199 struct llog_ctxt *ctxt;
203 /* cleanup our llogs only if the ctxts have been setup
204 * (client lov doesn't setup, mds lov does). */
205 ctxt = llog_get_context(obd, LLOG_MDS_OST_ORIG_CTXT);
207 rc = llog_cleanup(ctxt);
209 ctxt = llog_get_context(obd, LLOG_SIZE_REPL_CTXT);
211 rc2 = llog_cleanup(ctxt);
215 /* lov->tgt llogs are cleaned during osc_cleanup. */