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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 #include <linux/module.h>
46 #include <linux/version.h>
48 #include <libcfs/list.h>
49 #include <obd_class.h>
50 #include <lustre_fsfilt.h>
51 #include <lustre_mds.h>
52 #include <lustre_log.h>
53 #include "mds_internal.h"
55 static int mds_llog_origin_add(const struct lu_env *env,
56 struct llog_ctxt *ctxt,
57 struct llog_rec_hdr *rec,
58 struct lov_stripe_md *lsm,
59 struct llog_cookie *logcookies, int numcookies)
61 struct obd_device *obd = ctxt->loc_obd;
62 struct obd_device *lov_obd = obd->u.mds.mds_lov_obd;
63 struct llog_ctxt *lctxt;
67 lctxt = llog_get_context(lov_obd, ctxt->loc_idx);
68 rc = llog_add(env, lctxt, rec, lsm, logcookies, numcookies);
74 static int mds_llog_origin_connect(struct llog_ctxt *ctxt,
75 struct llog_logid *logid,
77 struct obd_uuid *uuid)
79 struct obd_device *obd = ctxt->loc_obd;
80 struct obd_device *lov_obd = obd->u.mds.mds_lov_obd;
81 struct llog_ctxt *lctxt;
85 lctxt = llog_get_context(lov_obd, ctxt->loc_idx);
86 rc = llog_connect(lctxt, logid, gen, uuid);
91 static struct llog_operations mds_ost_orig_logops = {
92 lop_add: mds_llog_origin_add,
93 lop_connect: mds_llog_origin_connect,
96 static int mds_llog_repl_cancel(const struct lu_env *env,
97 struct llog_ctxt *ctxt,
98 struct lov_stripe_md *lsm,
99 int count, struct llog_cookie *cookies,
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(env, 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(const struct lu_env *env,
121 struct llog_handle *llh,
122 struct llog_rec_hdr *hdr, void *data)
124 struct llog_changelog_rec *rec = (struct llog_changelog_rec *)hdr;
125 struct llog_cookie cookie;
126 long long endrec = *(long long *)data;
128 struct obd_device *obd;
133 /* This is always a (sub)log, not the catalog */
134 LASSERT(llh->lgh_hdr->llh_flags & LLOG_F_IS_PLAIN);
136 if (rec->cr.cr_index > endrec)
137 /* records are in order, so we're done */
138 RETURN(LLOG_PROC_BREAK);
140 cookie.lgc_lgl = llh->lgh_id;
141 cookie.lgc_index = hdr->lrh_index;
142 obd = llh->lgh_ctxt->loc_exp->exp_obd;
143 inode = llh->lgh_file->f_dentry->d_inode;
145 /* XXX This is a workaround for the deadlock of changelog adding vs.
146 * changelog cancelling. Changelog adding always start transaction
147 * before acquiring the catlog lock (lgh_lock), whereas, changelog
148 * cancelling do start transaction after holding catlog lock.
150 * We start the transaction earlier here to keep the locking ordering:
151 * 'start transaction -> catlog lock'. LU-81. */
152 trans_h = fsfilt_start_log(obd, inode, FSFILT_OP_CANCEL_UNLINK,
154 if (IS_ERR(trans_h)) {
155 CERROR("fsfilt_start_log failed: %ld\n", PTR_ERR(trans_h));
156 RETURN(PTR_ERR(trans_h));
159 /* cancel them one at a time. I suppose we could store up the cookies
160 and cancel them all at once; probably more efficient, but this is
161 done as a user call, so who cares... */
162 rc = llog_cat_cancel_records(env, llh->u.phd.phd_cat_handle, 1,
165 err = fsfilt_commit(obd, inode, trans_h, 0);
167 CERROR("fsfilt_commit failed: %d\n", err);
168 rc = (rc >= 0) ? err : rc;
171 RETURN(rc < 0 ? rc : 0);
174 static int llog_changelog_cancel(const struct lu_env *env,
175 struct llog_ctxt *ctxt,
176 struct lov_stripe_md *lsm, int count,
177 struct llog_cookie *cookies, int flags)
179 struct llog_handle *cathandle = ctxt->loc_handle;
183 /* This should only be called with the catalog handle */
184 LASSERT(cathandle->lgh_hdr->llh_flags & LLOG_F_IS_CAT);
186 rc = llog_cat_process(env, cathandle, llog_changelog_cancel_cb,
187 (void *)cookies, 0, 0);
189 /* 0 or 1 means we're done */
192 CERROR("cancel idx %u of catalog "LPX64" rc=%d\n",
193 cathandle->lgh_last_idx, cathandle->lgh_id.lgl_oid, rc);
198 int mds_changelog_llog_init(struct obd_device *obd, struct obd_device *tgt)
202 /* see osc_llog_init */
203 changelog_orig_logops = llog_lvfs_ops;
204 changelog_orig_logops.lop_setup = llog_obd_origin_setup;
205 changelog_orig_logops.lop_cleanup = llog_obd_origin_cleanup;
206 changelog_orig_logops.lop_add = llog_obd_origin_add;
207 changelog_orig_logops.lop_cancel = llog_changelog_cancel;
209 rc = llog_setup_named(obd, &obd->obd_olg, LLOG_CHANGELOG_ORIG_CTXT,
210 tgt, 1, NULL, CHANGELOG_CATALOG,
211 &changelog_orig_logops);
213 CERROR("changelog llog setup failed %d\n", rc);
217 rc = llog_setup_named(obd, &obd->obd_olg, LLOG_CHANGELOG_USER_ORIG_CTXT,
218 tgt, 1, NULL, CHANGELOG_USERS,
219 &changelog_orig_logops);
221 CERROR("changelog users llog setup failed %d\n", rc);
227 EXPORT_SYMBOL(mds_changelog_llog_init);
229 int mds_llog_init(struct obd_device *obd, struct obd_llog_group *olg,
230 struct obd_device *disk_obd, int *index)
232 struct obd_device *lov_obd = obd->u.mds.mds_lov_obd;
233 struct llog_ctxt *ctxt;
237 LASSERT(olg == &obd->obd_olg);
238 rc = llog_setup(obd, &obd->obd_olg, LLOG_MDS_OST_ORIG_CTXT, disk_obd,
239 0, NULL, &mds_ost_orig_logops);
243 rc = llog_setup(obd, &obd->obd_olg, LLOG_SIZE_REPL_CTXT, disk_obd,
244 0, NULL, &mds_size_repl_logops);
248 rc = obd_llog_init(lov_obd, &lov_obd->obd_olg, disk_obd, index);
250 CERROR("lov_llog_init err %d\n", rc);
251 GOTO(err_cleanup, rc);
256 ctxt = llog_get_context(obd, LLOG_SIZE_REPL_CTXT);
260 ctxt = llog_get_context(obd, LLOG_MDS_OST_ORIG_CTXT);
266 int mds_llog_finish(struct obd_device *obd, int count)
268 struct llog_ctxt *ctxt;
272 ctxt = llog_get_context(obd, LLOG_MDS_OST_ORIG_CTXT);
274 rc = llog_cleanup(ctxt);
276 ctxt = llog_get_context(obd, LLOG_SIZE_REPL_CTXT);
278 rc2 = llog_cleanup(ctxt);
282 ctxt = llog_get_context(obd, LLOG_CHANGELOG_ORIG_CTXT);
284 rc2 = llog_cleanup(ctxt);
288 ctxt = llog_get_context(obd, LLOG_CHANGELOG_USER_ORIG_CTXT);
290 rc2 = llog_cleanup(ctxt);
297 static int mds_llog_add_unlink(struct obd_device *obd,
298 struct lov_stripe_md *lsm, obd_count count,
299 struct llog_cookie *logcookie, int cookies)
301 struct llog_unlink_rec *lur;
302 struct llog_ctxt *ctxt;
305 if (cookies < lsm->lsm_stripe_count)
308 /* first prepare unlink log record */
311 RETURN(rc = -ENOMEM);
312 lur->lur_hdr.lrh_len = lur->lur_tail.lrt_len = sizeof(*lur);
313 lur->lur_hdr.lrh_type = MDS_UNLINK_REC;
314 lur->lur_count = count;
316 ctxt = llog_get_context(obd, LLOG_MDS_OST_ORIG_CTXT);
317 rc = llog_add(NULL, ctxt, &lur->lur_hdr, lsm, logcookie, cookies);
324 int mds_log_op_unlink(struct obd_device *obd,
325 struct lov_mds_md *lmm, int lmm_size,
326 struct llog_cookie *logcookies, int cookies_size)
328 struct mds_obd *mds = &obd->u.mds;
329 struct lov_stripe_md *lsm = NULL;
333 if (IS_ERR(mds->mds_lov_obd))
334 RETURN(PTR_ERR(mds->mds_lov_obd));
336 rc = obd_unpackmd(mds->mds_lov_exp, &lsm, lmm, lmm_size);
339 rc = mds_llog_add_unlink(obd, lsm, 0, logcookies,
340 cookies_size / sizeof(struct llog_cookie));
341 obd_free_memmd(mds->mds_lov_exp, &lsm);
344 EXPORT_SYMBOL(mds_log_op_unlink);
346 int mds_log_op_orphan(struct obd_device *obd, struct lov_stripe_md *lsm,
349 struct mds_obd *mds = &obd->u.mds;
350 struct llog_cookie logcookie;
354 if (IS_ERR(mds->mds_lov_obd))
355 RETURN(PTR_ERR(mds->mds_lov_obd));
357 rc = mds_llog_add_unlink(obd, lsm, count - 1, &logcookie, 1);