1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
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15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
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23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
30 * Use is subject to license terms.
32 * Copyright (c) 2012, Whamcloud, Inc.
35 * This file is part of Lustre, http://www.lustre.org/
36 * Lustre is a trademark of Sun Microsystems, Inc.
38 * lustre/mds/mds_log.c
40 * Author: Peter Braam <braam@clusterfs.com>
41 * Author: Andreas Dilger <adilger@clusterfs.com>
42 * Author: Phil Schwan <phil@clusterfs.com>
45 #define DEBUG_SUBSYSTEM S_MDS
47 #ifndef AUTOCONF_INCLUDED
48 #include <linux/config.h>
50 #include <linux/module.h>
51 #include <linux/version.h>
53 #include <libcfs/list.h>
54 #include <obd_class.h>
55 #include <lustre_fsfilt.h>
56 #include <lustre_mds.h>
57 #include <lustre_log.h>
58 #include "mds_internal.h"
60 static int mds_llog_origin_add(struct llog_ctxt *ctxt, struct llog_rec_hdr *rec,
61 struct lov_stripe_md *lsm,
62 struct llog_cookie *logcookies, int numcookies)
64 struct obd_device *obd = ctxt->loc_obd;
65 struct obd_device *lov_obd = obd->u.mds.mds_lov_obd;
66 struct llog_ctxt *lctxt;
70 lctxt = llog_get_context(lov_obd, ctxt->loc_idx);
71 rc = llog_add(lctxt, rec, lsm, logcookies, numcookies);
77 static int mds_llog_origin_connect(struct llog_ctxt *ctxt,
78 struct llog_logid *logid,
80 struct obd_uuid *uuid)
82 struct obd_device *obd = ctxt->loc_obd;
83 struct obd_device *lov_obd = obd->u.mds.mds_lov_obd;
84 struct llog_ctxt *lctxt;
88 lctxt = llog_get_context(lov_obd, ctxt->loc_idx);
89 rc = llog_connect(lctxt, logid, gen, uuid);
94 static struct llog_operations mds_ost_orig_logops = {
95 lop_add: mds_llog_origin_add,
96 lop_connect: mds_llog_origin_connect,
99 static int mds_llog_repl_cancel(struct llog_ctxt *ctxt, struct lov_stripe_md *lsm,
100 int count, struct llog_cookie *cookies, int flags)
102 struct obd_device *obd = ctxt->loc_obd;
103 struct obd_device *lov_obd = obd->u.mds.mds_lov_obd;
104 struct llog_ctxt *lctxt;
108 lctxt = llog_get_context(lov_obd, ctxt->loc_idx);
109 rc = llog_cancel(lctxt, lsm, count, cookies, flags);
110 llog_ctxt_put(lctxt);
114 static struct llog_operations mds_size_repl_logops = {
115 lop_cancel: mds_llog_repl_cancel,
118 static struct llog_operations changelog_orig_logops;
120 static int llog_changelog_cancel_cb(struct llog_handle *llh,
121 struct llog_rec_hdr *hdr, void *data)
123 struct llog_changelog_rec *rec = (struct llog_changelog_rec *)hdr;
124 struct llog_cookie cookie;
125 long long endrec = *(long long *)data;
127 struct obd_device *obd;
132 /* This is always a (sub)log, not the catalog */
133 LASSERT(llh->lgh_hdr->llh_flags & LLOG_F_IS_PLAIN);
135 if (rec->cr.cr_index > endrec)
136 /* records are in order, so we're done */
137 RETURN(LLOG_PROC_BREAK);
139 cookie.lgc_lgl = llh->lgh_id;
140 cookie.lgc_index = hdr->lrh_index;
141 obd = llh->lgh_ctxt->loc_exp->exp_obd;
142 inode = llh->lgh_file->f_dentry->d_inode;
144 /* XXX This is a workaround for the deadlock of changelog adding vs.
145 * changelog cancelling. Changelog adding always start transaction
146 * before acquiring the catlog lock (lgh_lock), whereas, changelog
147 * cancelling do start transaction after holding catlog lock.
149 * We start the transaction earlier here to keep the locking ordering:
150 * 'start transaction -> catlog lock'. LU-81. */
151 trans_h = fsfilt_start_log(obd, inode, FSFILT_OP_CANCEL_UNLINK,
153 if (IS_ERR(trans_h)) {
154 CERROR("fsfilt_start_log failed: %ld\n", PTR_ERR(trans_h));
155 RETURN(PTR_ERR(trans_h));
158 /* cancel them one at a time. I suppose we could store up the cookies
159 and cancel them all at once; probably more efficient, but this is
160 done as a user call, so who cares... */
161 rc = llog_cat_cancel_records(llh->u.phd.phd_cat_handle, 1, &cookie);
163 err = fsfilt_commit(obd, inode, trans_h, 0);
165 CERROR("fsfilt_commit failed: %d\n", err);
166 rc = (rc >= 0) ? err : rc;
169 RETURN(rc < 0 ? rc : 0);
172 static int llog_changelog_cancel(struct llog_ctxt *ctxt,
173 struct lov_stripe_md *lsm, int count,
174 struct llog_cookie *cookies, int flags)
176 struct llog_handle *cathandle = ctxt->loc_handle;
180 /* This should only be called with the catalog handle */
181 LASSERT(cathandle->lgh_hdr->llh_flags & LLOG_F_IS_CAT);
183 rc = llog_cat_process(cathandle, llog_changelog_cancel_cb,
184 (void *)cookies, 0, 0);
186 /* 0 or 1 means we're done */
189 CERROR("cancel idx %u of catalog "LPX64" rc=%d\n",
190 cathandle->lgh_last_idx, cathandle->lgh_id.lgl_oid, rc);
195 int mds_changelog_llog_init(struct obd_device *obd, struct obd_device *tgt)
199 /* see osc_llog_init */
200 changelog_orig_logops = llog_lvfs_ops;
201 changelog_orig_logops.lop_setup = llog_obd_origin_setup;
202 changelog_orig_logops.lop_cleanup = llog_obd_origin_cleanup;
203 changelog_orig_logops.lop_add = llog_obd_origin_add;
204 changelog_orig_logops.lop_cancel = llog_changelog_cancel;
206 rc = llog_setup_named(obd, &obd->obd_olg, LLOG_CHANGELOG_ORIG_CTXT,
207 tgt, 1, NULL, CHANGELOG_CATALOG,
208 &changelog_orig_logops);
210 CERROR("changelog llog setup failed %d\n", rc);
214 rc = llog_setup_named(obd, &obd->obd_olg, LLOG_CHANGELOG_USER_ORIG_CTXT,
215 tgt, 1, NULL, CHANGELOG_USERS,
216 &changelog_orig_logops);
218 CERROR("changelog users llog setup failed %d\n", rc);
224 EXPORT_SYMBOL(mds_changelog_llog_init);
226 int mds_llog_init(struct obd_device *obd, struct obd_llog_group *olg,
227 struct obd_device *disk_obd, int *index)
229 struct obd_device *lov_obd = obd->u.mds.mds_lov_obd;
230 struct llog_ctxt *ctxt;
234 LASSERT(olg == &obd->obd_olg);
235 rc = llog_setup(obd, &obd->obd_olg, LLOG_MDS_OST_ORIG_CTXT, disk_obd,
236 0, NULL, &mds_ost_orig_logops);
240 rc = llog_setup(obd, &obd->obd_olg, LLOG_SIZE_REPL_CTXT, disk_obd,
241 0, NULL, &mds_size_repl_logops);
245 rc = obd_llog_init(lov_obd, &lov_obd->obd_olg, disk_obd, index);
247 CERROR("lov_llog_init err %d\n", rc);
248 GOTO(err_cleanup, rc);
253 ctxt = llog_get_context(obd, LLOG_SIZE_REPL_CTXT);
257 ctxt = llog_get_context(obd, LLOG_MDS_OST_ORIG_CTXT);
263 int mds_llog_finish(struct obd_device *obd, int count)
265 struct llog_ctxt *ctxt;
269 ctxt = llog_get_context(obd, LLOG_MDS_OST_ORIG_CTXT);
271 rc = llog_cleanup(ctxt);
273 ctxt = llog_get_context(obd, LLOG_SIZE_REPL_CTXT);
275 rc2 = llog_cleanup(ctxt);
279 ctxt = llog_get_context(obd, LLOG_CHANGELOG_ORIG_CTXT);
281 rc2 = llog_cleanup(ctxt);
285 ctxt = llog_get_context(obd, LLOG_CHANGELOG_USER_ORIG_CTXT);
287 rc2 = llog_cleanup(ctxt);
294 static int mds_llog_add_unlink(struct obd_device *obd,
295 struct lov_stripe_md *lsm, obd_count count,
296 struct llog_cookie *logcookie, int cookies)
298 struct llog_unlink_rec *lur;
299 struct llog_ctxt *ctxt;
302 if (cookies < lsm->lsm_stripe_count)
305 /* first prepare unlink log record */
308 RETURN(rc = -ENOMEM);
309 lur->lur_hdr.lrh_len = lur->lur_tail.lrt_len = sizeof(*lur);
310 lur->lur_hdr.lrh_type = MDS_UNLINK_REC;
311 lur->lur_count = count;
313 ctxt = llog_get_context(obd, LLOG_MDS_OST_ORIG_CTXT);
314 rc = llog_add(ctxt, &lur->lur_hdr, lsm, logcookie, cookies);
321 int mds_log_op_unlink(struct obd_device *obd,
322 struct lov_mds_md *lmm, int lmm_size,
323 struct llog_cookie *logcookies, int cookies_size)
325 struct mds_obd *mds = &obd->u.mds;
326 struct lov_stripe_md *lsm = NULL;
330 if (IS_ERR(mds->mds_lov_obd))
331 RETURN(PTR_ERR(mds->mds_lov_obd));
333 rc = obd_unpackmd(mds->mds_lov_exp, &lsm, lmm, lmm_size);
336 rc = mds_llog_add_unlink(obd, lsm, 0, logcookies,
337 cookies_size / sizeof(struct llog_cookie));
338 obd_free_memmd(mds->mds_lov_exp, &lsm);
341 EXPORT_SYMBOL(mds_log_op_unlink);
343 int mds_log_op_orphan(struct obd_device *obd, struct lov_stripe_md *lsm,
346 struct mds_obd *mds = &obd->u.mds;
347 struct llog_cookie logcookie;
351 if (IS_ERR(mds->mds_lov_obd))
352 RETURN(PTR_ERR(mds->mds_lov_obd));
354 rc = mds_llog_add_unlink(obd, lsm, count - 1, &logcookie, 1);