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Btrfs: Add additional debugging for metadata checksum failures 

Signed-off-by: Chris Mason <chris.mason@oracle.com>
hifive-unleashed-5.1
Chris Mason 2008-04-09 16:28:12 -04:00
parent cea9e4452e
commit 728131d8e4
3 changed files with 55 additions and 4 deletions
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3
fs/btrfs/disk-io.c
View File

@ -283,6 +283,7 @@ static int btree_releasepage(struct page *page, gfp_t gfp_flags)
map = &BTRFS_I(page->mapping->host)->extent_tree;
ret = try_release_extent_mapping(map, tree, page, gfp_flags);
if (ret == 1) {
invalidate_extent_lru(tree, page_offset(page), PAGE_CACHE_SIZE);
ClearPagePrivate(page);
set_page_private(page, 0);
page_cache_release(page);
@ -376,7 +377,6 @@ int btrfs_verify_block_csum(struct btrfs_root *root,
buf->flags |= EXTENT_CSUM;
return 0;
}
lock_extent(io_tree, buf->start, end, GFP_NOFS);
if (test_range_bit(io_tree, buf->start, end, EXTENT_CSUM, 1)) {
@ -384,6 +384,7 @@ int btrfs_verify_block_csum(struct btrfs_root *root,
ret = 0;
goto out_unlock;
}
WARN_ON(buf->flags & EXTENT_CSUM);
ret = csum_tree_block(root, buf, 1);
set_extent_bits(io_tree, buf->start, end, EXTENT_CSUM, GFP_NOFS);

54
fs/btrfs/extent_io.c
View File

@ -2592,6 +2592,33 @@ static inline struct page *extent_buffer_page(struct extent_buffer *eb,
return p;
}
int invalidate_extent_lru(struct extent_io_tree *tree, u64 start,
unsigned long len)
{
struct list_head *lru = &tree->buffer_lru;
struct list_head *cur = lru->next;
struct extent_buffer *eb;
int found = 0;
spin_lock(&tree->lru_lock);
if (list_empty(lru))
goto out;
do {
eb = list_entry(cur, struct extent_buffer, lru);
if (eb->start <= start && eb->start + eb->len > start) {
eb->flags &= ~EXTENT_UPTODATE;
}
if (eb->start == start) {
eb->flags &= ~EXTENT_CSUM;
}
cur = cur->next;
} while (cur != lru);
out:
spin_unlock(&tree->lru_lock);
return found;
}
static struct extent_buffer *__alloc_extent_buffer(struct extent_io_tree *tree,
u64 start,
unsigned long len,
@ -2909,10 +2936,32 @@ EXPORT_SYMBOL(set_extent_buffer_uptodate);
int extent_buffer_uptodate(struct extent_io_tree *tree,
struct extent_buffer *eb)
{
int ret = 0;
int ret2;
int num_pages;
int i;
struct page *page;
int pg_uptodate = 1;
if (eb->flags & EXTENT_UPTODATE)
return 1;
return test_range_bit(tree, eb->start, eb->start + eb->len - 1,
ret = 1;
ret2 = test_range_bit(tree, eb->start, eb->start + eb->len - 1,
EXTENT_UPTODATE, 1);
num_pages = num_extent_pages(eb->start, eb->len);
for (i = 0; i < num_pages; i++) {
page = extent_buffer_page(eb, i);
if (!PageUptodate(page)) {
pg_uptodate = 0;
break;
}
}
if ((ret || ret2) && !pg_uptodate) {
printk("uptodate error2 eb %Lu ret %d ret2 %d pg_uptodate %d\n", eb->start, ret, ret2, pg_uptodate);
WARN_ON(1);
}
return (ret || ret2);
}
EXPORT_SYMBOL(extent_buffer_uptodate);
@ -2929,7 +2978,6 @@ int read_extent_buffer_pages(struct extent_io_tree *tree,
unsigned long num_pages;
struct bio *bio = NULL;
if (eb->flags & EXTENT_UPTODATE)
return 0;

2
fs/btrfs/extent_io.h
View File

@ -216,4 +216,6 @@ int map_private_extent_buffer(struct extent_buffer *eb, unsigned long offset,
unsigned long *map_start,
unsigned long *map_len, int km);
void unmap_extent_buffer(struct extent_buffer *eb, char *token, int km);
int invalidate_extent_lru(struct extent_io_tree *tree, u64 start,
unsigned long len);
#endif