diff options
Diffstat (limited to 'fs/btrfs/extent_io.c')
| -rw-r--r-- | fs/btrfs/extent_io.c | 23 |
1 files changed, 9 insertions, 14 deletions
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c index dc15eaa75c65..1ba8857a8dbe 100644 --- a/fs/btrfs/extent_io.c +++ b/fs/btrfs/extent_io.c @@ -4190,24 +4190,19 @@ void memzero_extent_buffer(const struct extent_buffer *eb, unsigned long start, void copy_extent_buffer_full(const struct extent_buffer *dst, const struct extent_buffer *src) { - int i; - int num_pages; + unsigned long cur = 0; ASSERT(dst->len == src->len); - if (dst->fs_info->nodesize >= PAGE_SIZE) { - num_pages = num_extent_pages(dst); - for (i = 0; i < num_pages; i++) - copy_page(page_address(dst->pages[i]), - page_address(src->pages[i])); - } else { - size_t src_offset = get_eb_offset_in_page(src, 0); - size_t dst_offset = get_eb_offset_in_page(dst, 0); + while (cur < src->len) { + unsigned long index = get_eb_page_index(cur); + unsigned long offset = get_eb_offset_in_page(src, cur); + unsigned long cur_len = min(src->len, PAGE_SIZE - offset); + void *addr = page_address(src->pages[index]) + offset; + + write_extent_buffer(dst, addr, cur, cur_len); - ASSERT(src->fs_info->nodesize < PAGE_SIZE); - memcpy(page_address(dst->pages[0]) + dst_offset, - page_address(src->pages[0]) + src_offset, - src->len); + cur += cur_len; } } |