Btrfs: Add debugging checks to track down corrupted metadata
Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 83ba0c3..7ca89c4 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -1811,6 +1811,7 @@
}
/* the get_extent function already copied into the page */
if (test_range_bit(tree, cur, cur_end, EXTENT_UPTODATE, 1)) {
+ check_page_uptodate(tree, page);
unlock_extent(tree, cur, cur + iosize - 1, GFP_NOFS);
cur = cur + iosize;
page_offset += iosize;
@@ -2785,21 +2786,20 @@
* properly set. releasepage may drop page->private
* on us if the page isn't already dirty.
*/
+ lock_page(page);
if (i == 0) {
- lock_page(page);
set_page_extent_head(page, eb->len);
} else if (PagePrivate(page) &&
page->private != EXTENT_PAGE_PRIVATE) {
- lock_page(page);
set_page_extent_mapped(page);
- unlock_page(page);
}
__set_page_dirty_nobuffers(extent_buffer_page(eb, i));
- if (i == 0)
- unlock_page(page);
+ set_extent_dirty(tree, page_offset(page),
+ page_offset(page) + PAGE_CACHE_SIZE -1,
+ GFP_NOFS);
+ unlock_page(page);
}
- return set_extent_dirty(tree, eb->start,
- eb->start + eb->len - 1, GFP_NOFS);
+ return 0;
}
EXPORT_SYMBOL(set_extent_buffer_dirty);
@@ -2952,6 +2952,9 @@
if (all_uptodate) {
if (start_i == 0)
eb->flags |= EXTENT_UPTODATE;
+ if (ret) {
+ printk("all up to date but ret is %d\n", ret);
+ }
goto unlock_exit;
}
@@ -2968,6 +2971,7 @@
mirror_num);
if (err) {
ret = err;
+ printk("err %d from __extent_read_full_page\n", ret);
}
} else {
unlock_page(page);
@@ -2978,12 +2982,15 @@
submit_one_bio(READ, bio, mirror_num);
if (ret || !wait) {
+ if (ret)
+ printk("ret %d wait %d returning\n", ret, wait);
return ret;
}
for (i = start_i; i < num_pages; i++) {
page = extent_buffer_page(eb, i);
wait_on_page_locked(page);
if (!PageUptodate(page)) {
+ printk("page not uptodate after wait_on_page_locked\n");
ret = -EIO;
}
}