diff options
Diffstat (limited to 'fs/btrfs/file-item.c')
| -rw-r--r-- | fs/btrfs/file-item.c | 75 |
1 files changed, 74 insertions, 1 deletions
diff --git a/fs/btrfs/file-item.c b/fs/btrfs/file-item.c index 6dbe88b9d7d4..f4d3fa71bc41 100644 --- a/fs/btrfs/file-item.c +++ b/fs/btrfs/file-item.c @@ -31,7 +31,8 @@ int btrfs_insert_file_extent(struct btrfs_trans_handle *trans, struct btrfs_root *root, u64 objectid, u64 pos, u64 disk_offset, u64 disk_num_bytes, - u64 num_bytes, u64 offset) + u64 num_bytes, u64 offset, u64 ram_bytes, + u8 compression, u8 encryption, u16 other_encoding) { int ret = 0; struct btrfs_file_extent_item *item; @@ -57,8 +58,13 @@ int btrfs_insert_file_extent(struct btrfs_trans_handle *trans, btrfs_set_file_extent_disk_num_bytes(leaf, item, disk_num_bytes); btrfs_set_file_extent_offset(leaf, item, offset); btrfs_set_file_extent_num_bytes(leaf, item, num_bytes); + btrfs_set_file_extent_ram_bytes(leaf, item, ram_bytes); btrfs_set_file_extent_generation(leaf, item, trans->transid); btrfs_set_file_extent_type(leaf, item, BTRFS_FILE_EXTENT_REG); + btrfs_set_file_extent_compression(leaf, item, compression); + btrfs_set_file_extent_encryption(leaf, item, encryption); + btrfs_set_file_extent_other_encoding(leaf, item, other_encoding); + btrfs_mark_buffer_dirty(leaf); out: btrfs_free_path(path); @@ -213,6 +219,73 @@ found: return 0; } +int btrfs_csum_file_bytes(struct btrfs_root *root, struct inode *inode, + u64 start, unsigned long len) +{ + struct btrfs_ordered_sum *sums; + struct btrfs_sector_sum *sector_sum; + struct btrfs_ordered_extent *ordered; + char *data; + struct page *page; + unsigned long total_bytes = 0; + unsigned long this_sum_bytes = 0; + + sums = kzalloc(btrfs_ordered_sum_size(root, len), GFP_NOFS); + if (!sums) + return -ENOMEM; + + sector_sum = sums->sums; + sums->file_offset = start; + sums->len = len; + INIT_LIST_HEAD(&sums->list); + ordered = btrfs_lookup_ordered_extent(inode, sums->file_offset); + BUG_ON(!ordered); + + while(len > 0) { + if (start >= ordered->file_offset + ordered->len || + start < ordered->file_offset) { + sums->len = this_sum_bytes; + this_sum_bytes = 0; + btrfs_add_ordered_sum(inode, ordered, sums); + btrfs_put_ordered_extent(ordered); + + sums = kzalloc(btrfs_ordered_sum_size(root, len), + GFP_NOFS); + BUG_ON(!sums); + sector_sum = sums->sums; + sums->len = len; + sums->file_offset = start; + ordered = btrfs_lookup_ordered_extent(inode, + sums->file_offset); + BUG_ON(!ordered); + } + + page = find_get_page(inode->i_mapping, + start >> PAGE_CACHE_SHIFT); + + data = kmap_atomic(page, KM_USER0); + sector_sum->sum = ~(u32)0; + sector_sum->sum = btrfs_csum_data(root, data, sector_sum->sum, + PAGE_CACHE_SIZE); + kunmap_atomic(data, KM_USER0); + btrfs_csum_final(sector_sum->sum, + (char *)§or_sum->sum); + sector_sum->offset = page_offset(page); + page_cache_release(page); + + sector_sum++; + total_bytes += PAGE_CACHE_SIZE; + this_sum_bytes += PAGE_CACHE_SIZE; + start += PAGE_CACHE_SIZE; + + WARN_ON(len < PAGE_CACHE_SIZE); + len -= PAGE_CACHE_SIZE; + } + btrfs_add_ordered_sum(inode, ordered, sums); + btrfs_put_ordered_extent(ordered); + return 0; +} + int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode, struct bio *bio) { |