diff options
Diffstat (limited to 'fs/ubifs')
| -rw-r--r-- | fs/ubifs/recovery.c | 84 |
1 files changed, 28 insertions, 56 deletions
diff --git a/fs/ubifs/recovery.c b/fs/ubifs/recovery.c index 42b4512c46b..7d922033d66 100644 --- a/fs/ubifs/recovery.c +++ b/fs/ubifs/recovery.c @@ -609,8 +609,8 @@ static int drop_incomplete_group(struct ubifs_scan_leb *sleb, int *offs) struct ubifs_scan_leb *ubifs_recover_leb(struct ubifs_info *c, int lnum, int offs, void *sbuf, int grouped) { - int err, len = c->leb_size - offs, need_clean = 0, quiet = 1; - int empty_chkd = 0, start = offs; + int ret = 0, err, len = c->leb_size - offs, need_clean = 0; + int start = offs; struct ubifs_scan_leb *sleb; void *buf = sbuf + offs; @@ -624,8 +624,6 @@ struct ubifs_scan_leb *ubifs_recover_leb(struct ubifs_info *c, int lnum, need_clean = 1; while (len >= 8) { - int ret; - dbg_scan("look at LEB %d:%d (%d bytes left)", lnum, offs, len); @@ -635,8 +633,7 @@ struct ubifs_scan_leb *ubifs_recover_leb(struct ubifs_info *c, int lnum, * Scan quietly until there is an error from which we cannot * recover */ - ret = ubifs_scan_a_node(c, buf, len, lnum, offs, quiet); - + ret = ubifs_scan_a_node(c, buf, len, lnum, offs, 0); if (ret == SCANNED_A_NODE) { /* A valid node, and not a padding node */ struct ubifs_ch *ch = buf; @@ -649,66 +646,37 @@ struct ubifs_scan_leb *ubifs_recover_leb(struct ubifs_info *c, int lnum, offs += node_len; buf += node_len; len -= node_len; - continue; - } - - if (ret > 0) { + } else if (ret > 0) { /* Padding bytes or a valid padding node */ offs += ret; buf += ret; len -= ret; - continue; - } - - if (ret == SCANNED_EMPTY_SPACE) { - if (!is_empty(buf, len)) { - if (!is_last_write(c, buf, offs)) - break; - clean_buf(c, &buf, lnum, &offs, &len); - need_clean = 1; - } - empty_chkd = 1; + } else if (ret == SCANNED_EMPTY_SPACE || + ret == SCANNED_GARBAGE || + ret == SCANNED_A_BAD_PAD_NODE || + ret == SCANNED_A_CORRUPT_NODE) { + dbg_rcvry("found corruption - %d", ret); break; - } - - if (ret == SCANNED_GARBAGE || ret == SCANNED_A_BAD_PAD_NODE) - if (is_last_write(c, buf, offs)) { - clean_buf(c, &buf, lnum, &offs, &len); - need_clean = 1; - empty_chkd = 1; - break; - } - - if (ret == SCANNED_A_CORRUPT_NODE) - if (no_more_nodes(c, buf, len, lnum, offs)) { - clean_buf(c, &buf, lnum, &offs, &len); - need_clean = 1; - empty_chkd = 1; - break; - } - - if (quiet) { - /* Redo the last scan but noisily */ - quiet = 0; - continue; - } - - switch (ret) { - case SCANNED_GARBAGE: - dbg_err("garbage"); - goto corrupted; - case SCANNED_A_CORRUPT_NODE: - case SCANNED_A_BAD_PAD_NODE: - dbg_err("bad node"); - goto corrupted; - default: - dbg_err("unknown"); + } else { + dbg_err("unexpected return value %d", ret); err = -EINVAL; goto error; } } - if (!empty_chkd && !is_empty(buf, len)) { + if (ret == SCANNED_GARBAGE || ret == SCANNED_A_BAD_PAD_NODE) { + if (is_last_write(c, buf, offs)) { + clean_buf(c, &buf, lnum, &offs, &len); + need_clean = 1; + } else + goto corrupted_rescan; + } else if (ret == SCANNED_A_CORRUPT_NODE) { + if (no_more_nodes(c, buf, len, lnum, offs)) { + clean_buf(c, &buf, lnum, &offs, &len); + need_clean = 1; + } else + goto corrupted_rescan; + } else if (!is_empty(buf, len)) { if (is_last_write(c, buf, offs)) { clean_buf(c, &buf, lnum, &offs, &len); need_clean = 1; @@ -751,6 +719,10 @@ struct ubifs_scan_leb *ubifs_recover_leb(struct ubifs_info *c, int lnum, return sleb; +corrupted_rescan: + /* Re-scan the corrupted data with verbose messages */ + dbg_err("corruptio %d", ret); + ubifs_scan_a_node(c, buf, len, lnum, offs, 1); corrupted: ubifs_scanned_corruption(c, lnum, offs, buf); err = -EUCLEAN; |