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LU-7340 mdd: changelogs garbage collection
[fs/lustre-release.git] / lustre / obdclass / llog_cat.c
index b6b29eb..1628cc8 100644 (file)
@@ -85,8 +85,18 @@ static int llog_cat_new_log(const struct lu_env *env,
         * last_idx and cat_idx */
        if ((index == llh->llh_cat_idx + 1 && llh->llh_count > 1) ||
            (index == 0 && llh->llh_cat_idx == 0)) {
-               CWARN("%s: there are no more free slots in catalog\n",
-                     loghandle->lgh_ctxt->loc_obd->obd_name);
+               if (cathandle->lgh_name == NULL) {
+                       CWARN("%s: there are no more free slots in catalog "
+                             DFID":%x\n",
+                             loghandle->lgh_ctxt->loc_obd->obd_name,
+                             PFID(&cathandle->lgh_id.lgl_oi.oi_fid),
+                             cathandle->lgh_id.lgl_ogen);
+               } else {
+                       CWARN("%s: there are no more free slots in "
+                             "catalog %s\n",
+                             loghandle->lgh_ctxt->loc_obd->obd_name,
+                             cathandle->lgh_name);
+               }
                RETURN(-ENOSPC);
        }
 
@@ -744,16 +754,38 @@ int llog_cat_cancel_records(const struct lu_env *env,
                        continue;
                }
 
+               if ((cathandle->lgh_ctxt->loc_flags &
+                    LLOG_CTXT_FLAG_NORMAL_FID) && !llog_exist(loghandle)) {
+                       /* For update log, some of loghandles of cathandle
+                        * might not exist because remote llog creation might
+                        * be failed, so let's skip the record cancellation
+                        * for these non-exist llogs.
+                        */
+                       lrc = -ENOENT;
+                       CDEBUG(D_HA, "%s: llog "DFID":%x does not exist"
+                              ": rc = %d\n",
+                              cathandle->lgh_ctxt->loc_obd->obd_name,
+                              PFID(&lgl->lgl_oi.oi_fid), lgl->lgl_ogen, lrc);
+                       failed++;
+                       if (rc == 0)
+                               rc = lrc;
+                       continue;
+               }
+
                lrc = llog_cancel_rec(env, loghandle, cookies->lgc_index);
                if (lrc == LLOG_DEL_PLAIN) { /* log has been destroyed */
                        index = loghandle->u.phd.phd_cookie.lgc_index;
-                       rc = llog_cat_cleanup(env, cathandle, loghandle, index);
+                       lrc = llog_cat_cleanup(env, cathandle, loghandle,
+                                              index);
+                       if (rc == 0)
+                               rc = lrc;
                } else if (lrc == -ENOENT) {
                        if (rc == 0) /* ENOENT shouldn't rewrite any error */
                                rc = lrc;
                } else if (lrc < 0) {
                        failed++;
-                       rc = lrc;
+                       if (rc == 0)
+                               rc = lrc;
                }
                llog_handle_put(loghandle);
        }
@@ -766,57 +798,76 @@ int llog_cat_cancel_records(const struct lu_env *env,
 }
 EXPORT_SYMBOL(llog_cat_cancel_records);
 
-static int llog_cat_process_cb(const struct lu_env *env,
-                              struct llog_handle *cat_llh,
-                              struct llog_rec_hdr *rec, void *data)
+static int llog_cat_process_common(const struct lu_env *env,
+                                  struct llog_handle *cat_llh,
+                                  struct llog_rec_hdr *rec,
+                                  struct llog_handle **llhp)
 {
-       struct llog_process_data *d = data;
-       struct llog_logid_rec *lir = (struct llog_logid_rec *)rec;
-       struct llog_handle *llh;
+       struct llog_logid_rec *lir = container_of(rec, typeof(*lir), lid_hdr);
        struct llog_log_hdr *hdr;
        int rc;
 
        ENTRY;
-       if (rec->lrh_type != LLOG_LOGID_MAGIC) {
-               CERROR("invalid record in catalog\n");
-               RETURN(-EINVAL);
+       if (rec->lrh_type != le32_to_cpu(LLOG_LOGID_MAGIC)) {
+               rc = -EINVAL;
+               CWARN("%s: invalid record in catalog "DFID":%x: rc = %d\n",
+                     cat_llh->lgh_ctxt->loc_obd->obd_name,
+                     PFID(&cat_llh->lgh_id.lgl_oi.oi_fid),
+                     cat_llh->lgh_id.lgl_ogen, rc);
+               RETURN(rc);
        }
-       CDEBUG(D_HA, "processing log "DFID":%x at index %u of catalog "
-              DFID"\n", PFID(&lir->lid_id.lgl_oi.oi_fid), lir->lid_id.lgl_ogen,
-              rec->lrh_index, PFID(&cat_llh->lgh_id.lgl_oi.oi_fid));
+       CDEBUG(D_HA, "processing log "DFID":%x at index %u of catalog "DFID"\n",
+              PFID(&lir->lid_id.lgl_oi.oi_fid), lir->lid_id.lgl_ogen,
+              le32_to_cpu(rec->lrh_index),
+              PFID(&cat_llh->lgh_id.lgl_oi.oi_fid));
 
-       rc = llog_cat_id2handle(env, cat_llh, &llh, &lir->lid_id);
+       rc = llog_cat_id2handle(env, cat_llh, llhp, &lir->lid_id);
        if (rc) {
-               CERROR("%s: cannot find handle for llog "DFID": rc = %d\n",
-                      cat_llh->lgh_ctxt->loc_obd->obd_name,
-                      PFID(&lir->lid_id.lgl_oi.oi_fid), rc);
-               if (rc == -ENOENT || rc == -ESTALE) {
-                       /* After a server crash, a stub of index
-                        * record in catlog could be kept, because
-                        * plain log destroy + catlog index record
-                        * deletion are not atomic. So we end up with
-                        * an index but no actual record. Destroy the
-                        * index and move on. */
-                       rc = llog_cat_cleanup(env, cat_llh, NULL,
-                                             rec->lrh_index);
-               }
+               /* After a server crash, a stub of index record in catlog could
+                * be kept, because plain log destroy + catlog index record
+                * deletion are not atomic. So we end up with an index but no
+                * actual record. Destroy the index and move on. */
+               if (rc == -ENOENT || rc == -ESTALE)
+                       rc = LLOG_DEL_RECORD;
+               else if (rc)
+                       CWARN("%s: can't find llog handle "DFID":%x: rc = %d\n",
+                             cat_llh->lgh_ctxt->loc_obd->obd_name,
+                             PFID(&lir->lid_id.lgl_oi.oi_fid),
+                             lir->lid_id.lgl_ogen, rc);
 
                RETURN(rc);
        }
 
        /* clean old empty llogs, do not consider current llog in use */
-       /* ignore remote (lgh_obj=NULL) llogs */
-       hdr = llh->lgh_hdr;
+       /* ignore remote (lgh_obj == NULL) llogs */
+       hdr = (*llhp)->lgh_hdr;
        if ((hdr->llh_flags & LLOG_F_ZAP_WHEN_EMPTY) &&
            hdr->llh_count == 1 && cat_llh->lgh_obj != NULL &&
-           llh != cat_llh->u.chd.chd_current_log) {
-               rc = llog_destroy(env, llh);
+           *llhp != cat_llh->u.chd.chd_current_log) {
+               rc = llog_destroy(env, *llhp);
                if (rc)
-                       CERROR("%s: fail to destroy empty log: rc = %d\n",
-                              llh->lgh_ctxt->loc_obd->obd_name, rc);
-               GOTO(out, rc = LLOG_DEL_PLAIN);
+                       CWARN("%s: can't destroy empty log "DFID": rc = %d\n",
+                             (*llhp)->lgh_ctxt->loc_obd->obd_name,
+                             PFID(&lir->lid_id.lgl_oi.oi_fid), rc);
+               rc = LLOG_DEL_PLAIN;
        }
 
+       RETURN(rc);
+}
+
+static int llog_cat_process_cb(const struct lu_env *env,
+                              struct llog_handle *cat_llh,
+                              struct llog_rec_hdr *rec, void *data)
+{
+       struct llog_process_data *d = data;
+       struct llog_handle *llh = NULL;
+       int rc;
+
+       ENTRY;
+       rc = llog_cat_process_common(env, cat_llh, rec, &llh);
+       if (rc)
+               GOTO(out, rc);
+
        if (rec->lrh_index < d->lpd_startcat) {
                /* Skip processing of the logs until startcat */
                rc = 0;
@@ -836,10 +887,16 @@ static int llog_cat_process_cb(const struct lu_env *env,
 
 out:
        /* The empty plain log was destroyed while processing */
-       if (rc == LLOG_DEL_PLAIN)
+       if (rc == LLOG_DEL_PLAIN) {
                rc = llog_cat_cleanup(env, cat_llh, llh,
                                      llh->u.phd.phd_cookie.lgc_index);
-       llog_handle_put(llh);
+       } else if (rc == LLOG_DEL_RECORD) {
+               /* clear wrong catalog entry */
+               rc = llog_cat_cleanup(env, cat_llh, NULL, rec->lrh_index);
+       }
+
+       if (llh)
+               llog_handle_put(llh);
 
        RETURN(rc);
 }
@@ -900,39 +957,33 @@ static int llog_cat_size_cb(const struct lu_env *env,
                             struct llog_rec_hdr *rec, void *data)
 {
        struct llog_process_data *d = data;
-       struct llog_logid_rec *lir = (struct llog_logid_rec *)rec;
-       struct llog_handle *llh;
-       int rc;
+       struct llog_handle *llh = NULL;
        __u64 *cum_size = d->lpd_data;
        __u64 size;
+       int rc;
 
        ENTRY;
-       if (rec->lrh_type != LLOG_LOGID_MAGIC) {
-               CERROR("%s: invalid record in catalog, rc = %d\n",
-                      cat_llh->lgh_ctxt->loc_obd->obd_name, -EINVAL);
-               RETURN(-EINVAL);
-       }
-       CDEBUG(D_HA, "processing log "DFID":%x at index %u of catalog "
-              DFID"\n", PFID(&lir->lid_id.lgl_oi.oi_fid), lir->lid_id.lgl_ogen,
-              rec->lrh_index, PFID(&cat_llh->lgh_id.lgl_oi.oi_fid));
+       rc = llog_cat_process_common(env, cat_llh, rec, &llh);
 
-       rc = llog_cat_id2handle(env, cat_llh, &llh, &lir->lid_id);
-       if (rc) {
-               CWARN("%s: cannot find handle for llog "DFID": rc = %d\n",
-                     cat_llh->lgh_ctxt->loc_obd->obd_name,
-                     PFID(&lir->lid_id.lgl_oi.oi_fid), rc);
-               RETURN(0);
-       }
-       size = llog_size(env, llh);
-       *cum_size += size;
+       if (rc == LLOG_DEL_PLAIN) {
+               /* empty log was deleted, don't count it */
+               rc = llog_cat_cleanup(env, cat_llh, llh,
+                                     llh->u.phd.phd_cookie.lgc_index);
+       } else if (rc == LLOG_DEL_RECORD) {
+               /* clear wrong catalog entry */
+               rc = llog_cat_cleanup(env, cat_llh, NULL, rec->lrh_index);
+       } else {
+               size = llog_size(env, llh);
+               *cum_size += size;
 
-       CDEBUG(D_INFO, "Add llog entry "DFID" size %llu\n",
-              PFID(&llh->lgh_id.lgl_oi.oi_fid), size);
+               CDEBUG(D_INFO, "Add llog entry "DFID" size=%llu, tot=%llu\n",
+                      PFID(&llh->lgh_id.lgl_oi.oi_fid), size, *cum_size);
+       }
 
-       llog_handle_put(llh);
+       if (llh != NULL)
+               llog_handle_put(llh);
 
        RETURN(0);
-
 }
 
 __u64 llog_cat_size(const struct lu_env *env, struct llog_handle *cat_llh)
@@ -946,59 +997,52 @@ __u64 llog_cat_size(const struct lu_env *env, struct llog_handle *cat_llh)
 }
 EXPORT_SYMBOL(llog_cat_size);
 
+/* currently returns the number of "free" entries in catalog,
+ * ie the available entries for a new plain LLOG file creation,
+ * even if catalog has wrapped
+ */
+__u32 llog_cat_free_space(struct llog_handle *cat_llh)
+{
+       /* simulate almost full Catalog */
+       if (OBD_FAIL_CHECK(OBD_FAIL_CAT_FREE_RECORDS))
+               return cfs_fail_val;
+
+       if (cat_llh->lgh_hdr->llh_count == 1)
+               return LLOG_HDR_BITMAP_SIZE(cat_llh->lgh_hdr) - 1;
+
+       if (cat_llh->lgh_last_idx > cat_llh->lgh_hdr->llh_cat_idx)
+               return LLOG_HDR_BITMAP_SIZE(cat_llh->lgh_hdr) - 1 +
+                      cat_llh->lgh_hdr->llh_cat_idx - cat_llh->lgh_last_idx;
+
+       /* catalog is presently wrapped */
+       return cat_llh->lgh_hdr->llh_cat_idx - cat_llh->lgh_last_idx;
+}
+EXPORT_SYMBOL(llog_cat_free_space);
+
 static int llog_cat_reverse_process_cb(const struct lu_env *env,
                                       struct llog_handle *cat_llh,
                                       struct llog_rec_hdr *rec, void *data)
 {
        struct llog_process_data *d = data;
-       struct llog_logid_rec *lir = (struct llog_logid_rec *)rec;
        struct llog_handle *llh;
-       struct llog_log_hdr *hdr;
        int rc;
 
-       if (le32_to_cpu(rec->lrh_type) != LLOG_LOGID_MAGIC) {
-               CERROR("invalid record in catalog\n");
-               RETURN(-EINVAL);
-       }
-       CDEBUG(D_HA, "processing log "DFID":%x at index %u of catalog "
-              DFID"\n", PFID(&lir->lid_id.lgl_oi.oi_fid), lir->lid_id.lgl_ogen,
-              le32_to_cpu(rec->lrh_index),
-              PFID(&cat_llh->lgh_id.lgl_oi.oi_fid));
-
-       rc = llog_cat_id2handle(env, cat_llh, &llh, &lir->lid_id);
-       if (rc) {
-               CERROR("%s: cannot find handle for llog "DFID": rc = %d\n",
-                      cat_llh->lgh_ctxt->loc_obd->obd_name,
-                      PFID(&lir->lid_id.lgl_oi.oi_fid), rc);
-               if (rc == -ENOENT || rc == -ESTALE) {
-                       /* After a server crash, a stub of index
-                        * record in catlog could be kept, because
-                        * plain log destroy + catlog index record
-                        * deletion are not atomic. So we end up with
-                        * an index but no actual record. Destroy the
-                        * index and move on. */
-                       rc = llog_cat_cleanup(env, cat_llh, NULL,
-                                             rec->lrh_index);
-               }
-
-               RETURN(rc);
-       }
+       ENTRY;
+       rc = llog_cat_process_common(env, cat_llh, rec, &llh);
 
-       /* clean old empty llogs, do not consider current llog in use */
-       hdr = llh->lgh_hdr;
-       if ((hdr->llh_flags & LLOG_F_ZAP_WHEN_EMPTY) &&
-           hdr->llh_count == 1 &&
-           llh != cat_llh->u.chd.chd_current_log) {
-               rc = llog_destroy(env, llh);
-               if (rc)
-                       CERROR("%s: fail to destroy empty log: rc = %d\n",
-                              llh->lgh_ctxt->loc_obd->obd_name, rc);
-               GOTO(out, rc = LLOG_DEL_PLAIN);
+       /* The empty plain log was destroyed while processing */
+       if (rc == LLOG_DEL_PLAIN) {
+               rc = llog_cat_cleanup(env, cat_llh, llh,
+                                     llh->u.phd.phd_cookie.lgc_index);
+       } else if (rc == LLOG_DEL_RECORD) {
+               /* clear wrong catalog entry */
+               rc = llog_cat_cleanup(env, cat_llh, NULL, rec->lrh_index);
        }
+       if (rc)
+               RETURN(rc);
 
        rc = llog_reverse_process(env, llh, d->lpd_cb, d->lpd_data, NULL);
 
-out:
        /* The empty plain was destroyed while processing */
        if (rc == LLOG_DEL_PLAIN)
                rc = llog_cat_cleanup(env, cat_llh, llh,