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
9 * it under the terms of the GNU General Public License version 2 only,
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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.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * lustre/mds/mds_log.c
38 * Author: Peter Braam <braam@clusterfs.com>
39 * Author: Andreas Dilger <adilger@clusterfs.com>
40 * Author: Phil Schwan <phil@clusterfs.com>
43 #define DEBUG_SUBSYSTEM S_MDS
45 #ifndef AUTOCONF_INCLUDED
46 #include <linux/config.h>
48 #include <linux/module.h>
49 #include <linux/version.h>
51 #include <libcfs/list.h>
52 #include <obd_class.h>
53 #include <lustre_fsfilt.h>
54 #include <lustre_mds.h>
55 #include <lustre_log.h>
56 #include "mds_internal.h"
58 static int mds_llog_origin_add(struct llog_ctxt *ctxt, struct llog_rec_hdr *rec,
59 struct lov_stripe_md *lsm,
60 struct llog_cookie *logcookies, int numcookies)
62 struct obd_device *obd = ctxt->loc_obd;
63 struct obd_device *lov_obd = obd->u.mds.mds_lov_obd;
64 struct llog_ctxt *lctxt;
68 lctxt = llog_get_context(lov_obd, ctxt->loc_idx);
69 rc = llog_add(lctxt, rec, lsm, logcookies, numcookies);
75 static int mds_llog_origin_connect(struct llog_ctxt *ctxt,
76 struct llog_logid *logid,
78 struct obd_uuid *uuid)
80 struct obd_device *obd = ctxt->loc_obd;
81 struct obd_device *lov_obd = obd->u.mds.mds_lov_obd;
82 struct llog_ctxt *lctxt;
86 lctxt = llog_get_context(lov_obd, ctxt->loc_idx);
87 rc = llog_connect(lctxt, logid, gen, uuid);
92 static struct llog_operations mds_ost_orig_logops = {
93 lop_add: mds_llog_origin_add,
94 lop_connect: mds_llog_origin_connect,
97 static int mds_llog_repl_cancel(struct llog_ctxt *ctxt, struct lov_stripe_md *lsm,
98 int count, struct llog_cookie *cookies, int flags)
100 struct obd_device *obd = ctxt->loc_obd;
101 struct obd_device *lov_obd = obd->u.mds.mds_lov_obd;
102 struct llog_ctxt *lctxt;
106 lctxt = llog_get_context(lov_obd, ctxt->loc_idx);
107 rc = llog_cancel(lctxt, lsm, count, cookies, flags);
108 llog_ctxt_put(lctxt);
112 static struct llog_operations mds_size_repl_logops = {
113 lop_cancel: mds_llog_repl_cancel,
116 static struct llog_operations changelog_orig_logops;
118 static int llog_changelog_cancel_cb(struct llog_handle *llh,
119 struct llog_rec_hdr *hdr, void *data)
121 struct llog_changelog_rec *rec = (struct llog_changelog_rec *)hdr;
122 struct llog_cookie cookie;
123 long long endrec = *(long long *)data;
125 struct obd_device *obd;
130 /* This is always a (sub)log, not the catalog */
131 LASSERT(llh->lgh_hdr->llh_flags & LLOG_F_IS_PLAIN);
133 if (rec->cr.cr_index > endrec)
134 /* records are in order, so we're done */
135 RETURN(LLOG_PROC_BREAK);
137 cookie.lgc_lgl = llh->lgh_id;
138 cookie.lgc_index = hdr->lrh_index;
139 obd = llh->lgh_ctxt->loc_exp->exp_obd;
140 inode = llh->lgh_file->f_dentry->d_inode;
142 /* XXX This is a workaround for the deadlock of changelog adding vs.
143 * changelog cancelling. Changelog adding always start transaction
144 * before acquiring the catlog lock (lgh_lock), whereas, changelog
145 * cancelling do start transaction after holding catlog lock.
147 * We start the transaction earlier here to keep the locking ordering:
148 * 'start transaction -> catlog lock'. LU-81. */
149 trans_h = fsfilt_start_log(obd, inode, FSFILT_OP_CANCEL_UNLINK,
151 if (IS_ERR(trans_h)) {
152 CERROR("fsfilt_start_log failed: %ld\n", PTR_ERR(trans_h));
153 RETURN(PTR_ERR(trans_h));
156 /* cancel them one at a time. I suppose we could store up the cookies
157 and cancel them all at once; probably more efficient, but this is
158 done as a user call, so who cares... */
159 rc = llog_cat_cancel_records(llh->u.phd.phd_cat_handle, 1, &cookie);
161 err = fsfilt_commit(obd, inode, trans_h, 0);
163 CERROR("fsfilt_commit failed: %d\n", err);
164 rc = (rc >= 0) ? err : rc;
167 RETURN(rc < 0 ? rc : 0);
170 static int llog_changelog_cancel(struct llog_ctxt *ctxt,
171 struct lov_stripe_md *lsm, int count,
172 struct llog_cookie *cookies, int flags)
174 struct llog_handle *cathandle = ctxt->loc_handle;
178 /* This should only be called with the catalog handle */
179 LASSERT(cathandle->lgh_hdr->llh_flags & LLOG_F_IS_CAT);
181 rc = llog_cat_process(cathandle, llog_changelog_cancel_cb,
182 (void *)cookies, 0, 0);
184 /* 0 or 1 means we're done */
187 CERROR("cancel idx %u of catalog "LPX64" rc=%d\n",
188 cathandle->lgh_last_idx, cathandle->lgh_id.lgl_oid, rc);
193 int mds_changelog_llog_init(struct obd_device *obd, struct obd_device *tgt)
197 /* see osc_llog_init */
198 changelog_orig_logops = llog_lvfs_ops;
199 changelog_orig_logops.lop_setup = llog_obd_origin_setup;
200 changelog_orig_logops.lop_cleanup = llog_obd_origin_cleanup;
201 changelog_orig_logops.lop_add = llog_obd_origin_add;
202 changelog_orig_logops.lop_cancel = llog_changelog_cancel;
204 rc = llog_setup_named(obd, &obd->obd_olg, LLOG_CHANGELOG_ORIG_CTXT,
205 tgt, 1, NULL, CHANGELOG_CATALOG,
206 &changelog_orig_logops);
208 CERROR("changelog llog setup failed %d\n", rc);
212 rc = llog_setup_named(obd, &obd->obd_olg, LLOG_CHANGELOG_USER_ORIG_CTXT,
213 tgt, 1, NULL, CHANGELOG_USERS,
214 &changelog_orig_logops);
216 CERROR("changelog users llog setup failed %d\n", rc);
222 EXPORT_SYMBOL(mds_changelog_llog_init);
224 int mds_llog_init(struct obd_device *obd, struct obd_llog_group *olg,
225 struct obd_device *disk_obd, int *index)
227 struct obd_device *lov_obd = obd->u.mds.mds_lov_obd;
228 struct llog_ctxt *ctxt;
232 LASSERT(olg == &obd->obd_olg);
233 rc = llog_setup(obd, &obd->obd_olg, LLOG_MDS_OST_ORIG_CTXT, disk_obd,
234 0, NULL, &mds_ost_orig_logops);
238 rc = llog_setup(obd, &obd->obd_olg, LLOG_SIZE_REPL_CTXT, disk_obd,
239 0, NULL, &mds_size_repl_logops);
243 rc = obd_llog_init(lov_obd, &lov_obd->obd_olg, disk_obd, index);
245 CERROR("lov_llog_init err %d\n", rc);
246 GOTO(err_cleanup, rc);
251 ctxt = llog_get_context(obd, LLOG_SIZE_REPL_CTXT);
255 ctxt = llog_get_context(obd, LLOG_MDS_OST_ORIG_CTXT);
261 int mds_llog_finish(struct obd_device *obd, int count)
263 struct llog_ctxt *ctxt;
267 ctxt = llog_get_context(obd, LLOG_MDS_OST_ORIG_CTXT);
269 rc = llog_cleanup(ctxt);
271 ctxt = llog_get_context(obd, LLOG_SIZE_REPL_CTXT);
273 rc2 = llog_cleanup(ctxt);
277 ctxt = llog_get_context(obd, LLOG_CHANGELOG_ORIG_CTXT);
279 rc2 = llog_cleanup(ctxt);
283 ctxt = llog_get_context(obd, LLOG_CHANGELOG_USER_ORIG_CTXT);
285 rc2 = llog_cleanup(ctxt);
292 static int mds_llog_add_unlink(struct obd_device *obd,
293 struct lov_stripe_md *lsm, obd_count count,
294 struct llog_cookie *logcookie, int cookies)
296 struct llog_unlink_rec *lur;
297 struct llog_ctxt *ctxt;
300 if (cookies < lsm->lsm_stripe_count)
303 /* first prepare unlink log record */
306 RETURN(rc = -ENOMEM);
307 lur->lur_hdr.lrh_len = lur->lur_tail.lrt_len = sizeof(*lur);
308 lur->lur_hdr.lrh_type = MDS_UNLINK_REC;
309 lur->lur_count = count;
311 ctxt = llog_get_context(obd, LLOG_MDS_OST_ORIG_CTXT);
312 rc = llog_add(ctxt, &lur->lur_hdr, lsm, logcookie, cookies);
319 int mds_log_op_unlink(struct obd_device *obd,
320 struct lov_mds_md *lmm, int lmm_size,
321 struct llog_cookie *logcookies, int cookies_size)
323 struct mds_obd *mds = &obd->u.mds;
324 struct lov_stripe_md *lsm = NULL;
328 if (IS_ERR(mds->mds_lov_obd))
329 RETURN(PTR_ERR(mds->mds_lov_obd));
331 rc = obd_unpackmd(mds->mds_lov_exp, &lsm, lmm, lmm_size);
334 rc = mds_llog_add_unlink(obd, lsm, 0, logcookies,
335 cookies_size / sizeof(struct llog_cookie));
336 obd_free_memmd(mds->mds_lov_exp, &lsm);
339 EXPORT_SYMBOL(mds_log_op_unlink);
341 int mds_log_op_orphan(struct obd_device *obd, struct lov_stripe_md *lsm,
344 struct mds_obd *mds = &obd->u.mds;
345 struct llog_cookie logcookie;
349 if (IS_ERR(mds->mds_lov_obd))
350 RETURN(PTR_ERR(mds->mds_lov_obd));
352 rc = mds_llog_add_unlink(obd, lsm, count - 1, &logcookie, 1);