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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(struct llog_ctxt *ctxt, struct llog_rec_hdr *rec,
56 struct lov_stripe_md *lsm,
57 struct llog_cookie *logcookies, int numcookies)
59 struct obd_device *obd = ctxt->loc_obd;
60 struct obd_device *lov_obd = obd->u.mds.mds_lov_obd;
61 struct llog_ctxt *lctxt;
65 lctxt = llog_get_context(lov_obd, ctxt->loc_idx);
66 rc = llog_add(lctxt, rec, lsm, logcookies, numcookies);
72 static int mds_llog_origin_connect(struct llog_ctxt *ctxt,
73 struct llog_logid *logid,
75 struct obd_uuid *uuid)
77 struct obd_device *obd = ctxt->loc_obd;
78 struct obd_device *lov_obd = obd->u.mds.mds_lov_obd;
79 struct llog_ctxt *lctxt;
83 lctxt = llog_get_context(lov_obd, ctxt->loc_idx);
84 rc = llog_connect(lctxt, logid, gen, uuid);
89 static struct llog_operations mds_ost_orig_logops = {
90 lop_add: mds_llog_origin_add,
91 lop_connect: mds_llog_origin_connect,
94 static int mds_llog_repl_cancel(struct llog_ctxt *ctxt, struct lov_stripe_md *lsm,
95 int count, struct llog_cookie *cookies, int flags)
97 struct obd_device *obd = ctxt->loc_obd;
98 struct obd_device *lov_obd = obd->u.mds.mds_lov_obd;
99 struct llog_ctxt *lctxt;
103 lctxt = llog_get_context(lov_obd, ctxt->loc_idx);
104 rc = llog_cancel(lctxt, lsm, count, cookies, flags);
105 llog_ctxt_put(lctxt);
109 static struct llog_operations mds_size_repl_logops = {
110 lop_cancel: mds_llog_repl_cancel,
113 static struct llog_operations changelog_orig_logops;
115 static int llog_changelog_cancel_cb(struct llog_handle *llh,
116 struct llog_rec_hdr *hdr, void *data)
118 struct llog_changelog_rec *rec = (struct llog_changelog_rec *)hdr;
119 struct llog_cookie cookie;
120 long long endrec = *(long long *)data;
122 struct obd_device *obd;
127 /* This is always a (sub)log, not the catalog */
128 LASSERT(llh->lgh_hdr->llh_flags & LLOG_F_IS_PLAIN);
130 if (rec->cr.cr_index > endrec)
131 /* records are in order, so we're done */
132 RETURN(LLOG_PROC_BREAK);
134 cookie.lgc_lgl = llh->lgh_id;
135 cookie.lgc_index = hdr->lrh_index;
136 obd = llh->lgh_ctxt->loc_exp->exp_obd;
137 inode = llh->lgh_file->f_dentry->d_inode;
139 /* XXX This is a workaround for the deadlock of changelog adding vs.
140 * changelog cancelling. Changelog adding always start transaction
141 * before acquiring the catlog lock (lgh_lock), whereas, changelog
142 * cancelling do start transaction after holding catlog lock.
144 * We start the transaction earlier here to keep the locking ordering:
145 * 'start transaction -> catlog lock'. LU-81. */
146 trans_h = fsfilt_start_log(obd, inode, FSFILT_OP_CANCEL_UNLINK,
148 if (IS_ERR(trans_h)) {
149 CERROR("fsfilt_start_log failed: %ld\n", PTR_ERR(trans_h));
150 RETURN(PTR_ERR(trans_h));
153 /* cancel them one at a time. I suppose we could store up the cookies
154 and cancel them all at once; probably more efficient, but this is
155 done as a user call, so who cares... */
156 rc = llog_cat_cancel_records(llh->u.phd.phd_cat_handle, 1, &cookie);
158 err = fsfilt_commit(obd, inode, trans_h, 0);
160 CERROR("fsfilt_commit failed: %d\n", err);
161 rc = (rc >= 0) ? err : rc;
164 RETURN(rc < 0 ? rc : 0);
167 static int llog_changelog_cancel(struct llog_ctxt *ctxt,
168 struct lov_stripe_md *lsm, int count,
169 struct llog_cookie *cookies, int flags)
171 struct llog_handle *cathandle = ctxt->loc_handle;
175 /* This should only be called with the catalog handle */
176 LASSERT(cathandle->lgh_hdr->llh_flags & LLOG_F_IS_CAT);
178 rc = llog_cat_process(cathandle, llog_changelog_cancel_cb,
179 (void *)cookies, 0, 0);
181 /* 0 or 1 means we're done */
184 CERROR("cancel idx %u of catalog "LPX64" rc=%d\n",
185 cathandle->lgh_last_idx, cathandle->lgh_id.lgl_oid, rc);
190 int mds_changelog_llog_init(struct obd_device *obd, struct obd_device *tgt)
194 /* see osc_llog_init */
195 changelog_orig_logops = llog_lvfs_ops;
196 changelog_orig_logops.lop_setup = llog_obd_origin_setup;
197 changelog_orig_logops.lop_cleanup = llog_obd_origin_cleanup;
198 changelog_orig_logops.lop_add = llog_obd_origin_add;
199 changelog_orig_logops.lop_cancel = llog_changelog_cancel;
201 rc = llog_setup_named(obd, &obd->obd_olg, LLOG_CHANGELOG_ORIG_CTXT,
202 tgt, 1, NULL, CHANGELOG_CATALOG,
203 &changelog_orig_logops);
205 CERROR("changelog llog setup failed %d\n", rc);
209 rc = llog_setup_named(obd, &obd->obd_olg, LLOG_CHANGELOG_USER_ORIG_CTXT,
210 tgt, 1, NULL, CHANGELOG_USERS,
211 &changelog_orig_logops);
213 CERROR("changelog users llog setup failed %d\n", rc);
219 EXPORT_SYMBOL(mds_changelog_llog_init);
221 int mds_llog_init(struct obd_device *obd, struct obd_llog_group *olg,
222 struct obd_device *disk_obd, int *index)
224 struct obd_device *lov_obd = obd->u.mds.mds_lov_obd;
225 struct llog_ctxt *ctxt;
229 LASSERT(olg == &obd->obd_olg);
230 rc = llog_setup(obd, &obd->obd_olg, LLOG_MDS_OST_ORIG_CTXT, disk_obd,
231 0, NULL, &mds_ost_orig_logops);
235 rc = llog_setup(obd, &obd->obd_olg, LLOG_SIZE_REPL_CTXT, disk_obd,
236 0, NULL, &mds_size_repl_logops);
240 rc = obd_llog_init(lov_obd, &lov_obd->obd_olg, disk_obd, index);
242 CERROR("lov_llog_init err %d\n", rc);
243 GOTO(err_cleanup, rc);
248 ctxt = llog_get_context(obd, LLOG_SIZE_REPL_CTXT);
252 ctxt = llog_get_context(obd, LLOG_MDS_OST_ORIG_CTXT);
258 int mds_llog_finish(struct obd_device *obd, int count)
260 struct llog_ctxt *ctxt;
264 ctxt = llog_get_context(obd, LLOG_MDS_OST_ORIG_CTXT);
266 rc = llog_cleanup(ctxt);
268 ctxt = llog_get_context(obd, LLOG_SIZE_REPL_CTXT);
270 rc2 = llog_cleanup(ctxt);
274 ctxt = llog_get_context(obd, LLOG_CHANGELOG_ORIG_CTXT);
276 rc2 = llog_cleanup(ctxt);
280 ctxt = llog_get_context(obd, LLOG_CHANGELOG_USER_ORIG_CTXT);
282 rc2 = llog_cleanup(ctxt);
289 static int mds_llog_add_unlink(struct obd_device *obd,
290 struct lov_stripe_md *lsm, obd_count count,
291 struct llog_cookie *logcookie, int cookies)
293 struct llog_unlink_rec *lur;
294 struct llog_ctxt *ctxt;
297 if (cookies < lsm->lsm_stripe_count)
300 /* first prepare unlink log record */
303 RETURN(rc = -ENOMEM);
304 lur->lur_hdr.lrh_len = lur->lur_tail.lrt_len = sizeof(*lur);
305 lur->lur_hdr.lrh_type = MDS_UNLINK_REC;
306 lur->lur_count = count;
308 ctxt = llog_get_context(obd, LLOG_MDS_OST_ORIG_CTXT);
309 rc = llog_add(ctxt, &lur->lur_hdr, lsm, logcookie, cookies);
316 int mds_log_op_unlink(struct obd_device *obd,
317 struct lov_mds_md *lmm, int lmm_size,
318 struct llog_cookie *logcookies, int cookies_size)
320 struct mds_obd *mds = &obd->u.mds;
321 struct lov_stripe_md *lsm = NULL;
325 if (IS_ERR(mds->mds_lov_obd))
326 RETURN(PTR_ERR(mds->mds_lov_obd));
328 rc = obd_unpackmd(mds->mds_lov_exp, &lsm, lmm, lmm_size);
331 rc = mds_llog_add_unlink(obd, lsm, 0, logcookies,
332 cookies_size / sizeof(struct llog_cookie));
333 obd_free_memmd(mds->mds_lov_exp, &lsm);
336 EXPORT_SYMBOL(mds_log_op_unlink);
338 int mds_log_op_orphan(struct obd_device *obd, struct lov_stripe_md *lsm,
341 struct mds_obd *mds = &obd->u.mds;
342 struct llog_cookie logcookie;
346 if (IS_ERR(mds->mds_lov_obd))
347 RETURN(PTR_ERR(mds->mds_lov_obd));
349 rc = mds_llog_add_unlink(obd, lsm, count - 1, &logcookie, 1);