diff options
Diffstat (limited to 'fs/btrfs/extent_io.c')
| -rw-r--r-- | fs/btrfs/extent_io.c | 64 |
1 files changed, 37 insertions, 27 deletions
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c index 76e0b5ed75dd..6e3b72e63e42 100644 --- a/fs/btrfs/extent_io.c +++ b/fs/btrfs/extent_io.c @@ -5703,12 +5703,12 @@ void read_extent_buffer(const struct extent_buffer *eb, void *dstv, struct page *page; char *kaddr; char *dst = (char *)dstv; - unsigned long i = start >> PAGE_SHIFT; + unsigned long i = get_eb_page_index(start); if (check_eb_range(eb, start, len)) return; - offset = offset_in_page(start); + offset = get_eb_offset_in_page(eb, start); while (len > 0) { page = eb->pages[i]; @@ -5733,13 +5733,13 @@ int read_extent_buffer_to_user_nofault(const struct extent_buffer *eb, struct page *page; char *kaddr; char __user *dst = (char __user *)dstv; - unsigned long i = start >> PAGE_SHIFT; + unsigned long i = get_eb_page_index(start); int ret = 0; WARN_ON(start > eb->len); WARN_ON(start + len > eb->start + eb->len); - offset = offset_in_page(start); + offset = get_eb_offset_in_page(eb, start); while (len > 0) { page = eb->pages[i]; @@ -5768,13 +5768,13 @@ int memcmp_extent_buffer(const struct extent_buffer *eb, const void *ptrv, struct page *page; char *kaddr; char *ptr = (char *)ptrv; - unsigned long i = start >> PAGE_SHIFT; + unsigned long i = get_eb_page_index(start); int ret = 0; if (check_eb_range(eb, start, len)) return -EINVAL; - offset = offset_in_page(start); + offset = get_eb_offset_in_page(eb, start); while (len > 0) { page = eb->pages[i]; @@ -5800,7 +5800,7 @@ void write_extent_buffer_chunk_tree_uuid(const struct extent_buffer *eb, char *kaddr; WARN_ON(!PageUptodate(eb->pages[0])); - kaddr = page_address(eb->pages[0]); + kaddr = page_address(eb->pages[0]) + get_eb_offset_in_page(eb, 0); memcpy(kaddr + offsetof(struct btrfs_header, chunk_tree_uuid), srcv, BTRFS_FSID_SIZE); } @@ -5810,7 +5810,7 @@ void write_extent_buffer_fsid(const struct extent_buffer *eb, const void *srcv) char *kaddr; WARN_ON(!PageUptodate(eb->pages[0])); - kaddr = page_address(eb->pages[0]); + kaddr = page_address(eb->pages[0]) + get_eb_offset_in_page(eb, 0); memcpy(kaddr + offsetof(struct btrfs_header, fsid), srcv, BTRFS_FSID_SIZE); } @@ -5823,12 +5823,12 @@ void write_extent_buffer(const struct extent_buffer *eb, const void *srcv, struct page *page; char *kaddr; char *src = (char *)srcv; - unsigned long i = start >> PAGE_SHIFT; + unsigned long i = get_eb_page_index(start); if (check_eb_range(eb, start, len)) return; - offset = offset_in_page(start); + offset = get_eb_offset_in_page(eb, start); while (len > 0) { page = eb->pages[i]; @@ -5852,12 +5852,12 @@ void memzero_extent_buffer(const struct extent_buffer *eb, unsigned long start, size_t offset; struct page *page; char *kaddr; - unsigned long i = start >> PAGE_SHIFT; + unsigned long i = get_eb_page_index(start); if (check_eb_range(eb, start, len)) return; - offset = offset_in_page(start); + offset = get_eb_offset_in_page(eb, start); while (len > 0) { page = eb->pages[i]; @@ -5881,10 +5881,20 @@ void copy_extent_buffer_full(const struct extent_buffer *dst, ASSERT(dst->len == src->len); - 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])); + if (dst->fs_info->sectorsize == 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); + + ASSERT(src->fs_info->sectorsize < PAGE_SIZE); + memcpy(page_address(dst->pages[0]) + dst_offset, + page_address(src->pages[0]) + src_offset, + src->len); + } } void copy_extent_buffer(const struct extent_buffer *dst, @@ -5897,7 +5907,7 @@ void copy_extent_buffer(const struct extent_buffer *dst, size_t offset; struct page *page; char *kaddr; - unsigned long i = dst_offset >> PAGE_SHIFT; + unsigned long i = get_eb_page_index(dst_offset); if (check_eb_range(dst, dst_offset, len) || check_eb_range(src, src_offset, len)) @@ -5905,7 +5915,7 @@ void copy_extent_buffer(const struct extent_buffer *dst, WARN_ON(src->len != dst_len); - offset = offset_in_page(dst_offset); + offset = get_eb_offset_in_page(dst, dst_offset); while (len > 0) { page = dst->pages[i]; @@ -5949,7 +5959,7 @@ static inline void eb_bitmap_offset(const struct extent_buffer *eb, * the bitmap item in the extent buffer + the offset of the byte in the * bitmap item. */ - offset = start + byte_offset; + offset = start + offset_in_page(eb->start) + byte_offset; *page_index = offset >> PAGE_SHIFT; *page_offset = offset_in_page(offset); @@ -6103,11 +6113,11 @@ void memcpy_extent_buffer(const struct extent_buffer *dst, return; while (len > 0) { - dst_off_in_page = offset_in_page(dst_offset); - src_off_in_page = offset_in_page(src_offset); + dst_off_in_page = get_eb_offset_in_page(dst, dst_offset); + src_off_in_page = get_eb_offset_in_page(dst, src_offset); - dst_i = dst_offset >> PAGE_SHIFT; - src_i = src_offset >> PAGE_SHIFT; + dst_i = get_eb_page_index(dst_offset); + src_i = get_eb_page_index(src_offset); cur = min(len, (unsigned long)(PAGE_SIZE - src_off_in_page)); @@ -6143,11 +6153,11 @@ void memmove_extent_buffer(const struct extent_buffer *dst, return; } while (len > 0) { - dst_i = dst_end >> PAGE_SHIFT; - src_i = src_end >> PAGE_SHIFT; + dst_i = get_eb_page_index(dst_end); + src_i = get_eb_page_index(src_end); - dst_off_in_page = offset_in_page(dst_end); - src_off_in_page = offset_in_page(src_end); + dst_off_in_page = get_eb_offset_in_page(dst, dst_end); + src_off_in_page = get_eb_offset_in_page(dst, src_end); cur = min_t(unsigned long, len, src_off_in_page + 1); cur = min(cur, dst_off_in_page + 1); |