Jeff Mahoney
47cff72748
Over the years, the reiserfs kernel code has been gradually cleaned up to be more readable. This patch does the same to the progs code. Signed-off-by: Jeff Mahoney <jeffm@suse.com>
263 lines
6.3 KiB
C
263 lines
6.3 KiB
C
/*
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* Copyright 2002-2004 by Hans Reiser, licensing governed by
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* reiserfsprogs/README
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*/
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#include "debugreiserfs.h"
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#include <search.h>
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#include <obstack.h>
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#define obstack_chunk_alloc malloc
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#define obstack_chunk_free free
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/* try to find blocks which contain only items which are */
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/* read blocks marked in debug_bitmap and collect statistic of it:
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number of stat data */
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struct {
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unsigned long all;
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unsigned long items[5];
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unsigned long unique_keys; /* keys of stat datas */
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unsigned long unique_entry_keys; /* keys which appear in directory entries */
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unsigned long names; /* dir entries but "." and ".." */
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unsigned long dir_blocks; /* block containing only one directory item */
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unsigned long unique_items;
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unsigned long leaves;
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unsigned long blocks_to_skip;
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} fs_stat;
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/* store unique item heads */
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struct obstack items;
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/* tree sorting item heades by comp_items_1 */
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void *items_tree;
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static int comp_items_1(const void *p1, const void *p2)
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{
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int retval;
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struct item_head *ih1, *ih2;
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/*
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if (*(int *)p1 != *(int *)p2)
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retval = 1;
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else
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retval = 0;
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*/
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retval = comp_keys(p1, p2);
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/*retval = comp_short_keys (p1, p2); */
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if (retval)
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return retval;
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ih1 = (struct item_head *)p1;
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ih2 = (struct item_head *)p2;
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if (get_ih_item_len(ih1) < get_ih_item_len(ih2))
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return -1;
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if (get_ih_item_len(ih1) > get_ih_item_len(ih2))
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return 1;
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if (get_ih_entry_count(ih1) < get_ih_entry_count(ih2))
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return -1;
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if (get_ih_entry_count(ih1) > get_ih_entry_count(ih2))
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return 1;
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return 0;
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}
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/*
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static void print_node (const void *nodep, VISIT value, int level)
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{
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int i;
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if (value == leaf) {
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for (i = 0; i < level; i ++)
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reiserfs_warning (stdout, "\t");
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reiserfs_warning (stdout, "%H\n", *(struct item_head **)nodep);
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return;
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}
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if (value == postorder) {
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for (i = 0; i < level; i ++)
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reiserfs_warning (stdout, "\t");
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reiserfs_warning (stdout, "%H\n", *(struct item_head **)nodep);
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}
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}
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*/
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static int is_unique_item(struct obstack *ostack, void **tree, void *ih)
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{
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void *res;
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void *key1;
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key1 = obstack_copy(ostack, ih, IH_SIZE);
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res = tsearch(key1, tree, comp_items_1);
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if (!res)
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reiserfs_panic("Too many keys found");
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/* twalk (*tree, print_node);*/
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/* reiserfs_warning (stderr, "\n\n");*/
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if (*(void **)res != key1) {
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/* key is in tree already, remove it from obstack */
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/*reiserfs_warning (stdout, "%H is skipped\n", ih);fflush (stdout); */
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obstack_free(ostack, key1);
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return 0;
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}
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/*reiserfs_warning (stdout, "%k is added\n", ih);fflush (stdout); */
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return 1;
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}
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static void stat1_the_leaf(reiserfs_filsys_t *fs, struct buffer_head *bh)
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{
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int i, i_num;
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struct item_head *ih;
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int is_there_unique_item;
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ih = B_N_PITEM_HEAD(bh, 0);
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is_there_unique_item = 0;
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i_num = leaf_item_number_estimate(bh);
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for (i = 0; i < i_num; i++, ih++) {
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/* count all items */
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fs_stat.all++;
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if (is_unique_item(&items, &items_tree, ih)) {
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/* this is item we have not seen yet */
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fs_stat.unique_items++;
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is_there_unique_item++;
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}
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}
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if (!is_there_unique_item) {
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/* the node contains only items we have seen already. so we will skip
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it */
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fs_stat.blocks_to_skip++;
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reiserfs_bitmap_clear_bit(input_bitmap(fs), bh->b_blocknr);
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} else {
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ih = B_N_PITEM_HEAD(bh, 0);
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/* node contains at least one unique item. We will put it in, count items of each type */
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for (i = 0; i < i_num; i++, ih++) {
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fs_stat.items[get_type(&ih->ih_key)]++;
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}
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}
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}
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/*
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static void stat2_the_leaf (struct buffer_head * bh)
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{
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int i;
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struct item_head * ih;
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ih = B_N_PITEM_HEAD (bh, 0);
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for (i = 0; i < node_item_number (bh); i ++, ih ++) {
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}
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}
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*/
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void do_stat(reiserfs_filsys_t *fs)
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{
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unsigned long i;
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unsigned long done, total;
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struct buffer_head *bh;
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int type;
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FILE *fp;
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obstack_init(&items);
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items_tree = 0;
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/*
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bh = bread (fs->s_dev, 8211, fs->s_blocksize);
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stat1_the_leaf (fs, bh);
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return;
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*/
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/* pass 0 of stating */
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total = reiserfs_bitmap_ones(input_bitmap(fs));
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done = 0;
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for (i = 0; i < get_sb_block_count(fs->fs_ondisk_sb); i++) {
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if (!reiserfs_bitmap_test_bit(input_bitmap(fs), i))
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continue;
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print_how_far(stderr, &done, total, 1, be_quiet(fs));
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bh = bread(fs->fs_dev, i, fs->fs_blocksize);
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if (!bh) {
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printf("could not read block %lu\n", i);
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continue;
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}
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type = who_is_this(bh->b_data, bh->b_size);
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if (type != THE_LEAF && type != HAS_IH_ARRAY) {
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reiserfs_bitmap_clear_bit(input_bitmap(fs), i);
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brelse(bh);
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continue;
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}
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fs_stat.leaves++;
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stat1_the_leaf(fs, bh);
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brelse(bh);
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}
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reiserfs_warning(stderr, "\nThere were found on the '%s' device:\n"
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"\tleaves %lu\n"
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"\ttotal number of items %lu\n"
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"\tblocks containing at least one unique item %lu\n"
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"\tblocks which can be skipped %lu\n"
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"\t\tstat data %lu\n"
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"\t\tindirect %lu\n"
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"\t\tdirect %lu\n"
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"\t\tdirectory items %lu\n" "\tunique items %lu\n",
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/*
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"\tnames there (but \".\" and \"..\") %lu\n"
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"\tpointing to unique keys %lu\n"
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"other items %lu\n"
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"blocks containing only 1 dir item %lu\n",
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*/
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fs->fs_file_name,
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fs_stat.leaves,
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fs_stat.all,
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fs_stat.leaves - fs_stat.blocks_to_skip,
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fs_stat.blocks_to_skip,
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fs_stat.items[TYPE_STAT_DATA],
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fs_stat.items[TYPE_INDIRECT],
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fs_stat.items[TYPE_DIRECT],
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fs_stat.items[TYPE_DIRENTRY], fs_stat.unique_items);
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/*
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fs_stat.names,
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fs_stat.unique_keys,
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fs_stat.items [4],
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fs_stat.dir_blocks);
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*/
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if (!input_bitmap_file_name(fs))
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return;
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fp = fopen(input_bitmap_file_name(fs), "w");
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if (!fp) {
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reiserfs_exit(1, "could not open %s to save bitmap: %m\n",
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input_bitmap_file_name(fs));
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}
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reiserfs_warning(stderr, "Updated bitmap contains %u blocks marked\n",
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reiserfs_bitmap_ones(input_bitmap(fs)));
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reiserfs_bitmap_save(fp, input_bitmap(fs));
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fclose(fp);
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return;
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/* pass 2 of stating */
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reiserfs_warning(stderr,
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"Looking for blocks containing only keys not pointed by any of entries\n");
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total = reiserfs_bitmap_ones(input_bitmap(fs));
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done = 0;
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for (i = 0; i < get_sb_block_count(fs->fs_ondisk_sb); i++) {
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if (!reiserfs_bitmap_test_bit(input_bitmap(fs), i))
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continue;
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print_how_far(stderr, &done, total, 1, be_quiet(fs));
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bh = bread(fs->fs_dev, i, fs->fs_blocksize);
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if (!bh) {
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printf("could not read block %lu\n", i);
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continue;
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}
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/*stat2_the_leaf (bh); */
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}
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}
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