Bug #1319 » undo.patch
| undo/undo.c 2009-03-22 18:33:21 +0000 | ||
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#define UNDO_FLAG_MULT 0x0001
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#define UNDO_FLAG_INOCHG 0x0002
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#define UNDO_FLAG_SETTID1 0x0004
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#define UNDO_FLAG_SETTID2 0x0008
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static int undo_hist_entry_compare(struct undo_hist_entry *he1,
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struct undo_hist_entry *he2);
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| ... | ... | |
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enum undo_type type;
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struct hammer_ioc_hist_entry ts1;
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struct hammer_ioc_hist_entry ts2;
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int c;
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int c, i;
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int flags;
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bzero(&ts1, sizeof(ts1));
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| ... | ... | |
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cmd = CMD_DUMP;
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type = TYPE_FILE;
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flags = 0;
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while ((c = getopt(ac, av, "adDiuvo:t:")) != -1) {
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i = -1;
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while ((c = getopt(ac, av, "adDiuvo:t:0123456789")) != -1) {
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if (c >= '0' && c <= '9') {
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c -= '0';
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i = (i >= 0) ? i*10 + c : c;
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continue;
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} else if (i >= 0) INDEX_ARG: {
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/* set placeholder IDs for later lookup */
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if (ts1.tid == 0 && !(flags & UNDO_FLAG_SETTID1))
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ts1.tid = i, flags |= UNDO_FLAG_SETTID1;
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else if (ts2.tid == 0 && !(flags & UNDO_FLAG_SETTID2))
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ts2.tid = i, flags |= UNDO_FLAG_SETTID2;
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else
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usage();
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i = -1;
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if (c == -1)
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/* got here after loop */
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break;
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}
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switch(c) {
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case 'd':
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if (type != TYPE_FILE)
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| ... | ... | |
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outFileName = optarg;
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break;
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case 't':
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if (ts1.tid && ts2.tid)
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usage();
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else if (ts1.tid == 0)
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if (ts1.tid == 0 && !(flags & UNDO_FLAG_SETTID1))
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ts1.tid = parse_delta_time(optarg);
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else
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else if (ts2.tid == 0 && !(flags & UNDO_FLAG_SETTID2))
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ts2.tid = parse_delta_time(optarg);
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else
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usage();
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break;
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default:
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usage();
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| ... | ... | |
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break;
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}
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}
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if (i >= 0)
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/* last argument numerical index */
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goto INDEX_ARG;
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/*
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* Option validation
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| ... | ... | |
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ac -= optind;
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av += optind;
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flags = 0;
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if (ac > 1)
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flags |= UNDO_FLAG_MULT;
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| ... | ... | |
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/*
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* Iterate through a file's history. If cmd == CMD_DUMP we take the
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* next-to-last transaction id. Otherwise if cmd == CMD_ITERATEALL
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* we scan all transaction ids.
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* next-to-last transaction id unless another given. Otherwise if
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* cmd == CMD_ITERATEALL we scan all transaction ids.
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*
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* Also iterate through the directory's history to locate other inodes that
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* used the particular file name.
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| ... | ... | |
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}
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}
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if (cmd == CMD_DUMP) {
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/*
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* Single entry, most recent prior to current
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*/
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if (ts1.tid == 0 && RB_EMPTY(&tse_tree)) {
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if ((ts1.tid == 0 ||
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flags & (UNDO_FLAG_SETTID1|UNDO_FLAG_SETTID2)) &&
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RB_EMPTY(&tse_tree)) {
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if ((fd = open(filename, O_RDONLY)) > 0) {
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collect_history(fd, &error, &tse_tree);
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close(fd);
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}
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}
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/*
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* Find entry if tid set to placeholder index
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*/
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if (flags & UNDO_FLAG_SETTID1){
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tse1 = RB_MAX(undo_hist_entry_rb_tree, &tse_tree);
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while (tse1 && ts1.tid--)
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tse1 = RB_PREV(undo_hist_entry_rb_tree,
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&tse_tree, tse1);
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if (tse1)
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ts1 = tse1->tse;
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else
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ts1.tid = 0;
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}
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if (flags & UNDO_FLAG_SETTID2){
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tse2 = RB_MAX(undo_hist_entry_rb_tree, &tse_tree);
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while (tse2 && ts2.tid--)
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tse2 = RB_PREV(undo_hist_entry_rb_tree,
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&tse_tree, tse2);
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if (tse2)
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ts2 = tse2->tse;
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else
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ts2.tid = 0;
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}
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/*
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* Single entry, most recent prior to current
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*/
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if (ts1.tid == 0) {
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tse2 = RB_MAX(undo_hist_entry_rb_tree, &tse_tree);
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if (tse2) {
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