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Btrfs: Add some extra debugging around file data checksum failures 

Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason 2008-01-29 09:10:27 -05:00
parent c2a8b6e110
commit aadfeb6e39
2 changed files with 9 additions and 3 deletions
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4
fs/btrfs/file-item.c
View File

@ -261,6 +261,10 @@ csum:
found:
csum_result = btrfs_csum_data(root, data, csum_result, len);
btrfs_csum_final(csum_result, (char *)&csum_result);
if (csum_result == 0) {
printk("csum result is 0 for inode %lu offset %Lu\n", inode->i_ino, offset);
}
write_extent_buffer(leaf, &csum_result, (unsigned long)item,
BTRFS_CRC32_SIZE);
btrfs_mark_buffer_dirty(path->nodes[0]);

8
fs/btrfs/inode.c
View File

@ -318,6 +318,7 @@ int btrfs_readpage_io_hook(struct page *page, u64 start, u64 end)
if (ret == -ENOENT || ret == -EFBIG)
ret = 0;
csum = 0;
printk("no csum found for inode %lu start %Lu\n", inode->i_ino, start);
goto out;
}
read_extent_buffer(path->nodes[0], &csum, (unsigned long)item,
@ -336,7 +337,7 @@ int btrfs_readpage_end_io_hook(struct page *page, u64 start, u64 end)
struct inode *inode = page->mapping->host;
struct extent_io_tree *io_tree = &BTRFS_I(inode)->io_tree;
char *kaddr;
u64 private;
u64 private = ~(u32)0;
int ret;
struct btrfs_root *root = BTRFS_I(inode)->root;
u32 csum = ~(u32)0;
@ -362,8 +363,9 @@ int btrfs_readpage_end_io_hook(struct page *page, u64 start, u64 end)
return 0;
zeroit:
printk("btrfs csum failed ino %lu off %llu\n",
page->mapping->host->i_ino, (unsigned long long)start);
printk("btrfs csum failed ino %lu off %llu csum %u private %Lu\n",
page->mapping->host->i_ino, (unsigned long long)start, csum,
private);
memset(kaddr + offset, 1, end - start + 1);
flush_dcache_page(page);
kunmap_atomic(kaddr, KM_IRQ0);