LU-14098 obdclass: try to skip corrupted llog records

[fs/lustre-release.git] / lustre / obdclass / llog_osd.c

diff --git a/lustre/obdclass/llog_osd.c b/lustre/obdclass/llog_osd.c
index 51829c8..63abf66 100644 (file)
--- a/lustre/obdclass/llog_osd.c
+++ b/lustre/obdclass/llog_osd.c
@@ -968,9 +968,25 @@ static int llog_osd_next_block(const struct lu_env *env,
                rec = buf;
                if (LLOG_REC_HDR_NEEDS_SWABBING(rec))
                        lustre_swab_llog_rec(rec);
-
                tail = (struct llog_rec_tail *)((char *)buf + rc -
                                                sizeof(struct llog_rec_tail));
+
+               if (llog_verify_record(loghandle, rec)) {
+                       /*
+                        * the block seems corrupted. make a pad record so the
+                        * caller can skip the block and try with the next one
+                        */
+                       rec->lrh_len = rc;
+                       rec->lrh_index = next_idx;
+                       rec->lrh_type = LLOG_PAD_MAGIC;
+
+                       tail = rec_tail(rec);
+                       tail->lrt_len = rc;
+                       tail->lrt_index = next_idx;
+
+                       GOTO(out, rc = 0);
+               }
+
                /* get the last record in block */
                last_rec = (struct llog_rec_hdr *)((char *)buf + rc -
                                                   tail->lrt_len);
@@ -1007,7 +1023,7 @@ static int llog_osd_next_block(const struct lu_env *env,
 
                /* sanity check that the start of the new buffer is no farther
                 * than the record that we wanted.  This shouldn't happen. */
-               if (rec->lrh_index > next_idx) {
+               if (next_idx && rec->lrh_index > next_idx) {
                        if (!force_mini_rec && next_idx > last_idx)
                                goto retry;