| version 1.1.1.1, 2012/02/17 15:09:30 | version 1.1.1.3, 2016/11/01 09:54:32 | 
| Line 3 | Line 3 | 
 | * | * | 
 | * Copyright (C) 1996 Andrew Tridgell | * Copyright (C) 1996 Andrew Tridgell | 
 | * Copyright (C) 1996 Paul Mackerras | * Copyright (C) 1996 Paul Mackerras | 
| * Copyright (C) 2003-2009 Wayne Davison | * Copyright (C) 2003-2015 Wayne Davison | 
 | * | * | 
 | * This program is free software; you can redistribute it and/or modify | * This program is free software; you can redistribute it and/or modify | 
 | * it under the terms of the GNU General Public License as published by | * it under the terms of the GNU General Public License as published by | 
| Line 20 | Line 20 | 
 | */ | */ | 
 |  |  | 
 | #include "rsync.h" | #include "rsync.h" | 
 |  | #include "inums.h" | 
 |  |  | 
 | extern int verbose; |  | 
 | extern int do_progress; |  | 
 | extern int checksum_seed; | extern int checksum_seed; | 
 | extern int append_mode; | extern int append_mode; | 
 |  | extern int checksum_len; | 
 |  |  | 
 | int updating_basis_file; | int updating_basis_file; | 
 |  | char sender_file_sum[MAX_DIGEST_LEN]; | 
 |  |  | 
 | static int false_alarms; | static int false_alarms; | 
 | static int hash_hits; | static int hash_hits; | 
| Line 107  static void matched(int f, struct sum_struct *s, struc | Line 108  static void matched(int f, struct sum_struct *s, struc | 
 | int32 n = (int32)(offset - last_match); /* max value: block_size (int32) */ | int32 n = (int32)(offset - last_match); /* max value: block_size (int32) */ | 
 | int32 j; | int32 j; | 
 |  |  | 
| if (verbose > 2 && i >= 0) { | if (DEBUG_GTE(DELTASUM, 2) && i >= 0) { | 
 | rprintf(FINFO, | rprintf(FINFO, | 
| "match at %.0f last_match=%.0f j=%d len=%ld n=%ld\n", | "match at %s last_match=%s j=%d len=%ld n=%ld\n", | 
| (double)offset, (double)last_match, i, | big_num(offset), big_num(last_match), i, | 
 | (long)s->sums[i].len, (long)n); | (long)s->sums[i].len, (long)n); | 
 | } | } | 
 |  |  | 
| Line 132  static void matched(int f, struct sum_struct *s, struc | Line 133  static void matched(int f, struct sum_struct *s, struc | 
 | else | else | 
 | last_match = offset; | last_match = offset; | 
 |  |  | 
| if (buf && do_progress) | if (buf && INFO_GTE(PROGRESS, 1)) | 
 | show_progress(last_match, buf->file_size); | show_progress(last_match, buf->file_size); | 
 | } | } | 
 |  |  | 
| Line 151  static void hash_search(int f,struct sum_struct *s, | Line 152  static void hash_search(int f,struct sum_struct *s, | 
 | * coding of the output to work more efficiently. */ | * coding of the output to work more efficiently. */ | 
 | want_i = 0; | want_i = 0; | 
 |  |  | 
| if (verbose > 2) { | if (DEBUG_GTE(DELTASUM, 2)) { | 
| rprintf(FINFO, "hash search b=%ld len=%.0f\n", | rprintf(FINFO, "hash search b=%ld len=%s\n", | 
| (long)s->blength, (double)len); | (long)s->blength, big_num(len)); | 
 | } | } | 
 |  |  | 
 | k = (int32)MIN(len, (OFF_T)s->blength); | k = (int32)MIN(len, (OFF_T)s->blength); | 
| Line 163  static void hash_search(int f,struct sum_struct *s, | Line 164  static void hash_search(int f,struct sum_struct *s, | 
 | sum = get_checksum1((char *)map, k); | sum = get_checksum1((char *)map, k); | 
 | s1 = sum & 0xFFFF; | s1 = sum & 0xFFFF; | 
 | s2 = sum >> 16; | s2 = sum >> 16; | 
| if (verbose > 3) | if (DEBUG_GTE(DELTASUM, 3)) | 
 | rprintf(FINFO, "sum=%.8x k=%ld\n", sum, (long)k); | rprintf(FINFO, "sum=%.8x k=%ld\n", sum, (long)k); | 
 |  |  | 
 | offset = aligned_offset = aligned_i = 0; | offset = aligned_offset = aligned_i = 0; | 
 |  |  | 
 | end = len + 1 - s->sums[s->count-1].len; | end = len + 1 - s->sums[s->count-1].len; | 
 |  |  | 
| if (verbose > 3) { | if (DEBUG_GTE(DELTASUM, 3)) { | 
| rprintf(FINFO, "hash search s->blength=%ld len=%.0f count=%.0f\n", | rprintf(FINFO, "hash search s->blength=%ld len=%s count=%s\n", | 
| (long)s->blength, (double)len, (double)s->count); | (long)s->blength, big_num(len), big_num(s->count)); | 
 | } | } | 
 |  |  | 
 | do { | do { | 
 | int done_csum2 = 0; | int done_csum2 = 0; | 
| int32 i; | uint32 hash_entry; | 
|  | int32 i, *prev; | 
 |  |  | 
| if (verbose > 4) { | if (DEBUG_GTE(DELTASUM, 4)) { | 
| rprintf(FINFO, "offset=%.0f sum=%04x%04x\n", | rprintf(FINFO, "offset=%s sum=%04x%04x\n", | 
| (double)offset, s2 & 0xFFFF, s1 & 0xFFFF); | big_num(offset), s2 & 0xFFFF, s1 & 0xFFFF); | 
 | } | } | 
 |  |  | 
 | if (tablesize == TRADITIONAL_TABLESIZE) { | if (tablesize == TRADITIONAL_TABLESIZE) { | 
| if ((i = hash_table[SUM2HASH2(s1,s2)]) < 0) | hash_entry = SUM2HASH2(s1,s2); | 
|  | if ((i = hash_table[hash_entry]) < 0) | 
 | goto null_hash; | goto null_hash; | 
 | sum = (s1 & 0xffff) | (s2 << 16); | sum = (s1 & 0xffff) | (s2 << 16); | 
 | } else { | } else { | 
 | sum = (s1 & 0xffff) | (s2 << 16); | sum = (s1 & 0xffff) | (s2 << 16); | 
| if ((i = hash_table[BIG_SUM2HASH(sum)]) < 0) | hash_entry = BIG_SUM2HASH(sum); | 
|  | if ((i = hash_table[hash_entry]) < 0) | 
 | goto null_hash; | goto null_hash; | 
 | } | } | 
 |  | prev = &hash_table[hash_entry]; | 
 |  |  | 
 | hash_hits++; | hash_hits++; | 
 | do { | do { | 
 | int32 l; | int32 l; | 
 |  |  | 
 |  | /* When updating in-place, the chunk's offset must be | 
 |  | * either >= our offset or identical data at that offset. | 
 |  | * Remove any bypassed entries that we can never use. */ | 
 |  | if (updating_basis_file && s->sums[i].offset < offset | 
 |  | && !(s->sums[i].flags & SUMFLG_SAME_OFFSET)) { | 
 |  | *prev = s->sums[i].chain; | 
 |  | continue; | 
 |  | } | 
 |  | prev = &s->sums[i].chain; | 
 |  |  | 
 | if (sum != s->sums[i].sum1) | if (sum != s->sums[i].sum1) | 
 | continue; | continue; | 
 |  |  | 
| Line 206  static void hash_search(int f,struct sum_struct *s, | Line 221  static void hash_search(int f,struct sum_struct *s, | 
 | if (l != s->sums[i].len) | if (l != s->sums[i].len) | 
 | continue; | continue; | 
 |  |  | 
| /* in-place: ensure chunk's offset is either >= our | if (DEBUG_GTE(DELTASUM, 3)) { | 
| * offset or that the data didn't move. */ |  | 
| if (updating_basis_file && s->sums[i].offset < offset |  | 
| && !(s->sums[i].flags & SUMFLG_SAME_OFFSET)) |  | 
| continue; |  | 
|  |  | 
| if (verbose > 3) { |  | 
 | rprintf(FINFO, | rprintf(FINFO, | 
| "potential match at %.0f i=%ld sum=%08x\n", | "potential match at %s i=%ld sum=%08x\n", | 
| (double)offset, (long)i, sum); | big_num(offset), (long)i, sum); | 
 | } | } | 
 |  |  | 
 | if (!done_csum2) { | if (!done_csum2) { | 
| Line 238  static void hash_search(int f,struct sum_struct *s, | Line 247  static void hash_search(int f,struct sum_struct *s, | 
 | aligned_offset += s->blength; | aligned_offset += s->blength; | 
 | aligned_i++; | aligned_i++; | 
 | } | } | 
| if (offset == aligned_offset && aligned_i < s->count) { | if ((offset == aligned_offset | 
|  | || (sum == 0 && l == s->blength && aligned_offset + l <= len)) | 
|  | && aligned_i < s->count) { | 
 | if (i != aligned_i) { | if (i != aligned_i) { | 
 | if (sum != s->sums[aligned_i].sum1 | if (sum != s->sums[aligned_i].sum1 | 
 | || l != s->sums[aligned_i].len | || l != s->sums[aligned_i].len | 
| Line 246  static void hash_search(int f,struct sum_struct *s, | Line 257  static void hash_search(int f,struct sum_struct *s, | 
 | goto check_want_i; | goto check_want_i; | 
 | i = aligned_i; | i = aligned_i; | 
 | } | } | 
 |  | if (offset != aligned_offset) { | 
 |  | /* We've matched some zeros in a spot that is also zeros | 
 |  | * further along in the basis file, if we find zeros ahead | 
 |  | * in the sender's file, we'll output enough literal data | 
 |  | * to re-align with the basis file, and get back to seeking | 
 |  | * instead of writing. */ | 
 |  | backup = (int32)(aligned_offset - last_match); | 
 |  | if (backup < 0) | 
 |  | backup = 0; | 
 |  | map = (schar *)map_ptr(buf, aligned_offset - backup, l + backup) | 
 |  | + backup; | 
 |  | sum = get_checksum1((char *)map, l); | 
 |  | if (sum != s->sums[i].sum1) | 
 |  | goto check_want_i; | 
 |  | get_checksum2((char *)map, l, sum2); | 
 |  | if (memcmp(sum2, s->sums[i].sum2, s->s2length) != 0) | 
 |  | goto check_want_i; | 
 |  | /* OK, we have a re-alignment match.  Bump the offset | 
 |  | * forward to the new match point. */ | 
 |  | offset = aligned_offset; | 
 |  | } | 
 | /* This identical chunk is in the same spot in the old and new file. */ | /* This identical chunk is in the same spot in the old and new file. */ | 
 | s->sums[i].flags |= SUMFLG_SAME_OFFSET; | s->sums[i].flags |= SUMFLG_SAME_OFFSET; | 
 | want_i = i; | want_i = i; | 
| Line 328  static void hash_search(int f,struct sum_struct *s, | Line 360  static void hash_search(int f,struct sum_struct *s, | 
 | **/ | **/ | 
 | void match_sums(int f, struct sum_struct *s, struct map_struct *buf, OFF_T len) | void match_sums(int f, struct sum_struct *s, struct map_struct *buf, OFF_T len) | 
 | { | { | 
 | char file_sum[MAX_DIGEST_LEN]; |  | 
 | int sum_len; |  | 
 |  |  | 
 | last_match = 0; | last_match = 0; | 
 | false_alarms = 0; | false_alarms = 0; | 
 | hash_hits = 0; | hash_hits = 0; | 
| Line 343  void match_sums(int f, struct sum_struct *s, struct ma | Line 372  void match_sums(int f, struct sum_struct *s, struct ma | 
 | if (append_mode == 2) { | if (append_mode == 2) { | 
 | OFF_T j = 0; | OFF_T j = 0; | 
 | for (j = CHUNK_SIZE; j < s->flength; j += CHUNK_SIZE) { | for (j = CHUNK_SIZE; j < s->flength; j += CHUNK_SIZE) { | 
| if (buf && do_progress) | if (buf && INFO_GTE(PROGRESS, 1)) | 
 | show_progress(last_match, buf->file_size); | show_progress(last_match, buf->file_size); | 
 | sum_update(map_ptr(buf, last_match, CHUNK_SIZE), | sum_update(map_ptr(buf, last_match, CHUNK_SIZE), | 
 | CHUNK_SIZE); | CHUNK_SIZE); | 
| Line 351  void match_sums(int f, struct sum_struct *s, struct ma | Line 380  void match_sums(int f, struct sum_struct *s, struct ma | 
 | } | } | 
 | if (last_match < s->flength) { | if (last_match < s->flength) { | 
 | int32 n = (int32)(s->flength - last_match); | int32 n = (int32)(s->flength - last_match); | 
| if (buf && do_progress) | if (buf && INFO_GTE(PROGRESS, 1)) | 
 | show_progress(last_match, buf->file_size); | show_progress(last_match, buf->file_size); | 
 | sum_update(map_ptr(buf, last_match, n), n); | sum_update(map_ptr(buf, last_match, n), n); | 
 | } | } | 
| Line 363  void match_sums(int f, struct sum_struct *s, struct ma | Line 392  void match_sums(int f, struct sum_struct *s, struct ma | 
 | if (len > 0 && s->count > 0) { | if (len > 0 && s->count > 0) { | 
 | build_hash_table(s); | build_hash_table(s); | 
 |  |  | 
| if (verbose > 2) | if (DEBUG_GTE(DELTASUM, 2)) | 
 | rprintf(FINFO,"built hash table\n"); | rprintf(FINFO,"built hash table\n"); | 
 |  |  | 
 | hash_search(f, s, buf, len); | hash_search(f, s, buf, len); | 
 |  |  | 
| if (verbose > 2) | if (DEBUG_GTE(DELTASUM, 2)) | 
 | rprintf(FINFO,"done hash search\n"); | rprintf(FINFO,"done hash search\n"); | 
 | } else { | } else { | 
 | OFF_T j; | OFF_T j; | 
| Line 378  void match_sums(int f, struct sum_struct *s, struct ma | Line 407  void match_sums(int f, struct sum_struct *s, struct ma | 
 | matched(f, s, buf, len, -1); | matched(f, s, buf, len, -1); | 
 | } | } | 
 |  |  | 
| sum_len = sum_end(file_sum); | if (sum_end(sender_file_sum) != checksum_len) | 
| /* If we had a read error, send a bad checksum. */ | overflow_exit("checksum_len"); /* Impossible... */ | 
| if (buf && buf->status != 0) |  | 
| file_sum[0]++; |  | 
 |  |  | 
| if (verbose > 2) | /* If we had a read error, send a bad checksum.  We use all bits | 
|  | * off as long as the checksum doesn't happen to be that, in | 
|  | * which case we turn the last 0 bit into a 1. */ | 
|  | if (buf && buf->status != 0) { | 
|  | int i; | 
|  | for (i = 0; i < checksum_len && sender_file_sum[i] == 0; i++) {} | 
|  | memset(sender_file_sum, 0, checksum_len); | 
|  | if (i == checksum_len) | 
|  | sender_file_sum[i-1]++; | 
|  | } | 
|  |  | 
|  | if (DEBUG_GTE(DELTASUM, 2)) | 
 | rprintf(FINFO,"sending file_sum\n"); | rprintf(FINFO,"sending file_sum\n"); | 
| write_buf(f, file_sum, sum_len); | write_buf(f, sender_file_sum, checksum_len); | 
 |  |  | 
| if (verbose > 2) | if (DEBUG_GTE(DELTASUM, 2)) { | 
 | rprintf(FINFO, "false_alarms=%d hash_hits=%d matches=%d\n", | rprintf(FINFO, "false_alarms=%d hash_hits=%d matches=%d\n", | 
 | false_alarms, hash_hits, matches); | false_alarms, hash_hits, matches); | 
 |  | } | 
 |  |  | 
 | total_hash_hits += hash_hits; | total_hash_hits += hash_hits; | 
 | total_false_alarms += false_alarms; | total_false_alarms += false_alarms; | 
| Line 399  void match_sums(int f, struct sum_struct *s, struct ma | Line 438  void match_sums(int f, struct sum_struct *s, struct ma | 
 |  |  | 
 | void match_report(void) | void match_report(void) | 
 | { | { | 
| if (verbose <= 1) | if (!DEBUG_GTE(DELTASUM, 1)) | 
 | return; | return; | 
 |  |  | 
 | rprintf(FINFO, | rprintf(FINFO, | 
| "total: matches=%d  hash_hits=%d  false_alarms=%d data=%.0f\n", | "total: matches=%d  hash_hits=%d  false_alarms=%d data=%s\n", | 
 | total_matches, total_hash_hits, total_false_alarms, | total_matches, total_hash_hits, total_false_alarms, | 
| (double)stats.literal_data); | big_num(stats.literal_data)); | 
 | } | } |