diff options
Diffstat (limited to 'fs/btrfs/file-item.c')
| -rw-r--r-- | fs/btrfs/file-item.c | 50 |
1 files changed, 39 insertions, 11 deletions
diff --git a/fs/btrfs/file-item.c b/fs/btrfs/file-item.c index 3ebbc058d082..3f0e71b0e5d9 100644 --- a/fs/btrfs/file-item.c +++ b/fs/btrfs/file-item.c @@ -16,6 +16,9 @@ * Boston, MA 021110-1307, USA. */ +#include <linux/bio.h> +#include <linux/pagemap.h> +#include <linux/highmem.h> #include "ctree.h" #include "disk-io.h" #include "transaction.h" @@ -131,28 +134,35 @@ int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans, return ret; } -int btrfs_csum_file_block(struct btrfs_trans_handle *trans, - struct btrfs_root *root, - struct inode *inode, - u64 objectid, u64 offset, - char *data, size_t len) +int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans, + struct btrfs_root *root, struct inode *inode, + struct bio *bio) { + u64 objectid = inode->i_ino; + u64 offset; int ret; struct btrfs_key file_key; struct btrfs_key found_key; - u64 next_offset = (u64)-1; - int found_next = 0; + u64 next_offset; + int found_next; struct btrfs_path *path; struct btrfs_csum_item *item; + struct btrfs_csum_item *item_end; struct extent_buffer *leaf = NULL; u64 csum_offset; - u32 csum_result = ~(u32)0; + u32 csum_result; u32 nritems; u32 ins_size; + int bio_index = 0; + struct bio_vec *bvec = bio->bi_io_vec; + char *data; path = btrfs_alloc_path(); BUG_ON(!path); - +again: + next_offset = (u64)-1; + found_next = 0; + offset = page_offset(bvec->bv_page) + bvec->bv_offset; file_key.objectid = objectid; file_key.offset = offset; btrfs_set_key_type(&file_key, BTRFS_CSUM_ITEM_KEY); @@ -259,7 +269,15 @@ csum: item = (struct btrfs_csum_item *)((unsigned char *)item + csum_offset * BTRFS_CRC32_SIZE); found: - csum_result = btrfs_csum_data(root, data, csum_result, len); + item_end = btrfs_item_ptr(leaf, path->slots[0], struct btrfs_csum_item); + item_end = (struct btrfs_csum_item *)((unsigned char *)item_end + + btrfs_item_size_nr(leaf, path->slots[0])); +next_bvec: + data = kmap_atomic(bvec->bv_page, KM_IRQ0); + csum_result = ~(u32)0; + csum_result = btrfs_csum_data(root, data + bvec->bv_offset, + csum_result, bvec->bv_len); + kunmap_atomic(data, KM_IRQ0); 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); @@ -267,9 +285,19 @@ found: write_extent_buffer(leaf, &csum_result, (unsigned long)item, BTRFS_CRC32_SIZE); + bio_index++; + bvec++; + if (bio_index < bio->bi_vcnt) { + item = (struct btrfs_csum_item *)((char *)item + BTRFS_CRC32_SIZE); + if (item < item_end) + goto next_bvec; + } btrfs_mark_buffer_dirty(path->nodes[0]); + if (bio_index < bio->bi_vcnt) { + btrfs_release_path(root, path); + goto again; + } fail: - btrfs_release_path(root, path); btrfs_free_path(path); return ret; } |