[JFFS2] Add paranoia debugging for superblock counts
The problem fixed in commit 014b164e13
(space leak with in-band cleanmarkers) would have been caught a lot
quicker if our paranoid debugging mode had included adding up the size
counts from all the eraseblocks and comparing the totals with the counts
in the superblock. Add that.
Make jffs2_mark_erased_block() file the newly-erased block on the
free_list before calling the debug function, to make it happy.
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
This commit is contained in:
parent
014b164e13
commit
85a62db624
132
fs/jffs2/debug.c
132
fs/jffs2/debug.c
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@ -153,6 +153,135 @@ __jffs2_dbg_prewrite_paranoia_check(struct jffs2_sb_info *c,
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kfree(buf);
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}
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void __jffs2_dbg_superblock_counts(struct jffs2_sb_info *c)
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{
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struct jffs2_eraseblock *jeb;
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uint32_t free = 0, dirty = 0, used = 0, wasted = 0,
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erasing = 0, bad = 0, unchecked = 0;
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int nr_counted = 0;
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int dump = 0;
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if (c->gcblock) {
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nr_counted++;
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free += c->gcblock->free_size;
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dirty += c->gcblock->dirty_size;
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used += c->gcblock->used_size;
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wasted += c->gcblock->wasted_size;
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unchecked += c->gcblock->unchecked_size;
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}
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if (c->nextblock) {
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nr_counted++;
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free += c->nextblock->free_size;
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dirty += c->nextblock->dirty_size;
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used += c->nextblock->used_size;
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wasted += c->nextblock->wasted_size;
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unchecked += c->nextblock->unchecked_size;
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}
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list_for_each_entry(jeb, &c->clean_list, list) {
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nr_counted++;
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free += jeb->free_size;
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dirty += jeb->dirty_size;
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used += jeb->used_size;
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wasted += jeb->wasted_size;
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unchecked += jeb->unchecked_size;
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}
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list_for_each_entry(jeb, &c->very_dirty_list, list) {
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nr_counted++;
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free += jeb->free_size;
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dirty += jeb->dirty_size;
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used += jeb->used_size;
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wasted += jeb->wasted_size;
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unchecked += jeb->unchecked_size;
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}
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list_for_each_entry(jeb, &c->dirty_list, list) {
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nr_counted++;
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free += jeb->free_size;
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dirty += jeb->dirty_size;
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used += jeb->used_size;
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wasted += jeb->wasted_size;
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unchecked += jeb->unchecked_size;
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}
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list_for_each_entry(jeb, &c->erasable_list, list) {
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nr_counted++;
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free += jeb->free_size;
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dirty += jeb->dirty_size;
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used += jeb->used_size;
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wasted += jeb->wasted_size;
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unchecked += jeb->unchecked_size;
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}
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list_for_each_entry(jeb, &c->erasable_pending_wbuf_list, list) {
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nr_counted++;
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free += jeb->free_size;
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dirty += jeb->dirty_size;
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used += jeb->used_size;
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wasted += jeb->wasted_size;
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unchecked += jeb->unchecked_size;
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}
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list_for_each_entry(jeb, &c->erase_pending_list, list) {
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nr_counted++;
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free += jeb->free_size;
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dirty += jeb->dirty_size;
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used += jeb->used_size;
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wasted += jeb->wasted_size;
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unchecked += jeb->unchecked_size;
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}
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list_for_each_entry(jeb, &c->free_list, list) {
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nr_counted++;
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free += jeb->free_size;
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dirty += jeb->dirty_size;
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used += jeb->used_size;
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wasted += jeb->wasted_size;
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unchecked += jeb->unchecked_size;
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}
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list_for_each_entry(jeb, &c->bad_used_list, list) {
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nr_counted++;
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free += jeb->free_size;
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dirty += jeb->dirty_size;
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used += jeb->used_size;
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wasted += jeb->wasted_size;
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unchecked += jeb->unchecked_size;
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}
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list_for_each_entry(jeb, &c->erasing_list, list) {
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nr_counted++;
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erasing += c->sector_size;
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}
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list_for_each_entry(jeb, &c->erase_complete_list, list) {
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nr_counted++;
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erasing += c->sector_size;
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}
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list_for_each_entry(jeb, &c->bad_list, list) {
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nr_counted++;
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bad += c->sector_size;
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}
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#define check(sz) \
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if (sz != c->sz##_size) { \
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printk(KERN_WARNING #sz "_size mismatch counted 0x%x, c->" #sz "_size 0x%x\n", \
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sz, c->sz##_size); \
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dump = 1; \
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}
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check(free);
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check(dirty);
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check(used);
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check(wasted);
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check(unchecked);
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check(bad);
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check(erasing);
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#undef check
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if (nr_counted != c->nr_blocks) {
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printk(KERN_WARNING "%s counted only 0x%x blocks of 0x%x. Where are the others?\n",
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__func__, nr_counted, c->nr_blocks);
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dump = 1;
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}
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if (dump) {
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__jffs2_dbg_dump_block_lists_nolock(c);
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BUG();
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}
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}
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/*
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* Check the space accounting and node_ref list correctness for the JFFS2 erasable block 'jeb'.
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*/
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@ -229,6 +358,9 @@ __jffs2_dbg_acct_paranoia_check_nolock(struct jffs2_sb_info *c,
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}
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#endif
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if (!(c->flags & (JFFS2_SB_FLAG_BUILDING|JFFS2_SB_FLAG_SCANNING)))
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__jffs2_dbg_superblock_counts(c);
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return;
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error:
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@ -460,12 +460,13 @@ static void jffs2_mark_erased_block(struct jffs2_sb_info *c, struct jffs2_eraseb
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if (c->cleanmarker_size && !jffs2_cleanmarker_oob(c))
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jffs2_link_node_ref(c, jeb, jeb->offset | REF_NORMAL, c->cleanmarker_size, NULL);
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jffs2_dbg_acct_sanity_check_nolock(c,jeb);
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jffs2_dbg_acct_paranoia_check_nolock(c, jeb);
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list_add_tail(&jeb->list, &c->free_list);
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c->nr_erasing_blocks--;
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c->nr_free_blocks++;
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jffs2_dbg_acct_sanity_check_nolock(c, jeb);
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jffs2_dbg_acct_paranoia_check_nolock(c, jeb);
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spin_unlock(&c->erase_completion_lock);
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mutex_unlock(&c->erase_free_sem);
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wake_up(&c->erase_wait);
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