Btrfs: Add additional debugging for metadata checksum failures

Signed-off-by: Chris Mason <chris.mason@oracle.com>

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index bc5bd5a..e444b99 100644 (file)
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -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);

diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 776c33f..13cc236 100644 (file)
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -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;
 

diff --git a/fs/btrfs/extent_io.h b/fs/btrfs/extent_io.h
index 16d67a6..d9f5bc4 100644 (file)
--- a/fs/btrfs/extent_io.h
+++ b/fs/btrfs/extent_io.h
@@ -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