diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index b5af1fc77c5d..6d8350332b1d 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -109,8 +109,14 @@ struct btrfs_ordered_sum; /* 32 bytes in various csum fields */ #define BTRFS_CSUM_SIZE 32 + +/* csum types */ +#define BTRFS_CSUM_TYPE_CRC32 0 + +static int btrfs_csum_sizes[] = { 4, 0 }; + /* four bytes for CRC32 */ -#define BTRFS_CRC32_SIZE 4 +//#define BTRFS_CRC32_SIZE 4 #define BTRFS_EMPTY_DIR_SIZE 0 #define BTRFS_FT_UNKNOWN 0 @@ -308,6 +314,7 @@ struct btrfs_super_block { __le64 compat_flags; __le64 compat_ro_flags; __le64 incompat_flags; + __le16 csum_type; u8 root_level; u8 chunk_root_level; u8 log_root_level; @@ -1483,6 +1490,7 @@ BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item, last_snapshot, 64); /* struct btrfs_super_block */ + BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64); BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64); BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block, @@ -1524,6 +1532,15 @@ BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block, compat_flags, 64); BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block, incompat_flags, 64); +BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block, + csum_type, 16); + +static inline int btrfs_super_csum_size(struct btrfs_super_block *s) +{ + int t = btrfs_super_csum_type(s); + BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes)); + return btrfs_csum_sizes[t]; +} static inline unsigned long btrfs_leaf_data(struct extent_buffer *l) { diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index dfd5ba05ce45..3eb7c2576fe5 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -176,7 +176,9 @@ void btrfs_csum_final(u32 crc, char *result) static int csum_tree_block(struct btrfs_root *root, struct extent_buffer *buf, int verify) { - char result[BTRFS_CRC32_SIZE]; + u16 csum_size = + btrfs_super_csum_size(&root->fs_info->super_copy); + char *result = NULL; unsigned long len; unsigned long cur_len; unsigned long offset = BTRFS_CSUM_SIZE; @@ -186,6 +188,7 @@ static int csum_tree_block(struct btrfs_root *root, struct extent_buffer *buf, unsigned long map_len; int err; u32 crc = ~(u32)0; + unsigned long inline_result; len = buf->len - offset; while(len > 0) { @@ -204,25 +207,37 @@ static int csum_tree_block(struct btrfs_root *root, struct extent_buffer *buf, offset += cur_len; unmap_extent_buffer(buf, map_token, KM_USER0); } + if (csum_size > sizeof(inline_result)) { + result = kzalloc(csum_size * sizeof(char), GFP_NOFS); + if (!result) + return 1; + } else { + result = (char *)&inline_result; + } + btrfs_csum_final(crc, result); if (verify) { /* FIXME, this is not good */ - if (memcmp_extent_buffer(buf, result, 0, BTRFS_CRC32_SIZE)) { + if (memcmp_extent_buffer(buf, result, 0, csum_size)) { u32 val; u32 found = 0; - memcpy(&found, result, BTRFS_CRC32_SIZE); + memcpy(&found, result, csum_size); - read_extent_buffer(buf, &val, 0, BTRFS_CRC32_SIZE); + read_extent_buffer(buf, &val, 0, csum_size); printk("btrfs: %s checksum verify failed on %llu " "wanted %X found %X level %d\n", root->fs_info->sb->s_id, buf->start, val, found, btrfs_header_level(buf)); + if (result != (char *)&inline_result) + kfree(result); return 1; } } else { - write_extent_buffer(buf, result, 0, BTRFS_CRC32_SIZE); + write_extent_buffer(buf, result, 0, csum_size); } + if (result != (char *)&inline_result) + kfree(result); return 0; } diff --git a/fs/btrfs/file-item.c b/fs/btrfs/file-item.c index f76378831407..234ed441736c 100644 --- a/fs/btrfs/file-item.c +++ b/fs/btrfs/file-item.c @@ -24,9 +24,9 @@ #include "transaction.h" #include "print-tree.h" -#define MAX_CSUM_ITEMS(r) ((((BTRFS_LEAF_DATA_SIZE(r) - \ - sizeof(struct btrfs_item) * 2) / \ - BTRFS_CRC32_SIZE) - 1)) +#define MAX_CSUM_ITEMS(r,size) ((((BTRFS_LEAF_DATA_SIZE(r) - \ + sizeof(struct btrfs_item) * 2) / \ + size) - 1)) int btrfs_insert_file_extent(struct btrfs_trans_handle *trans, struct btrfs_root *root, u64 objectid, u64 pos, @@ -83,6 +83,8 @@ struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans, struct btrfs_csum_item *item; struct extent_buffer *leaf; u64 csum_offset = 0; + u16 csum_size = + btrfs_super_csum_size(&root->fs_info->super_copy); int csums_in_item; file_key.objectid = objectid; @@ -105,7 +107,7 @@ struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans, csum_offset = (offset - found_key.offset) >> root->fs_info->sb->s_blocksize_bits; csums_in_item = btrfs_item_size_nr(leaf, path->slots[0]); - csums_in_item /= BTRFS_CRC32_SIZE; + csums_in_item /= csum_size; if (csum_offset >= csums_in_item) { ret = -EFBIG; @@ -114,7 +116,7 @@ struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans, } item = btrfs_item_ptr(leaf, path->slots[0], struct btrfs_csum_item); item = (struct btrfs_csum_item *)((unsigned char *)item + - csum_offset * BTRFS_CRC32_SIZE); + csum_offset * csum_size); return item; fail: if (ret > 0) @@ -150,6 +152,8 @@ int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode, u64 item_start_offset = 0; u64 item_last_offset = 0; u32 diff; + u16 csum_size = + btrfs_super_csum_size(&root->fs_info->super_copy); int ret; struct btrfs_path *path; struct btrfs_csum_item *item = NULL; @@ -195,7 +199,7 @@ int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode, item_size = btrfs_item_size_nr(path->nodes[0], path->slots[0]); item_last_offset = item_start_offset + - (item_size / BTRFS_CRC32_SIZE) * + (item_size / csum_size) * root->sectorsize; item = btrfs_item_ptr(path->nodes[0], path->slots[0], struct btrfs_csum_item); @@ -206,11 +210,11 @@ int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode, */ diff = offset - item_start_offset; diff = diff / root->sectorsize; - diff = diff * BTRFS_CRC32_SIZE; + diff = diff * csum_size; read_extent_buffer(path->nodes[0], &sum, ((unsigned long)item) + diff, - BTRFS_CRC32_SIZE); + csum_size); found: set_state_private(io_tree, offset, sum); bio_index++; @@ -383,6 +387,8 @@ int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans, char *eb_token; unsigned long map_len; unsigned long map_start; + u16 csum_size = + btrfs_super_csum_size(&root->fs_info->super_copy); path = btrfs_alloc_path(); BUG_ON(!path); @@ -408,7 +414,8 @@ again: /* we found one, but it isn't big enough yet */ leaf = path->nodes[0]; item_size = btrfs_item_size_nr(leaf, path->slots[0]); - if ((item_size / BTRFS_CRC32_SIZE) >= MAX_CSUM_ITEMS(root)) { + if ((item_size / csum_size) >= + MAX_CSUM_ITEMS(root, csum_size)) { /* already at max size, make a new one */ goto insert; } @@ -441,7 +448,7 @@ again: */ btrfs_release_path(root, path); ret = btrfs_search_slot(trans, root, &file_key, path, - BTRFS_CRC32_SIZE, 1); + csum_size, 1); if (ret < 0) goto fail_unlock; if (ret == 0) { @@ -457,14 +464,14 @@ again: root->fs_info->sb->s_blocksize_bits; if (btrfs_key_type(&found_key) != BTRFS_CSUM_ITEM_KEY || found_key.objectid != objectid || - csum_offset >= MAX_CSUM_ITEMS(root)) { + csum_offset >= MAX_CSUM_ITEMS(root, csum_size)) { goto insert; } if (csum_offset >= btrfs_item_size_nr(leaf, path->slots[0]) / - BTRFS_CRC32_SIZE) { - u32 diff = (csum_offset + 1) * BTRFS_CRC32_SIZE; + csum_size) { + u32 diff = (csum_offset + 1) * csum_size; diff = diff - btrfs_item_size_nr(leaf, path->slots[0]); - if (diff != BTRFS_CRC32_SIZE) + if (diff != csum_size) goto insert; ret = btrfs_extend_item(trans, root, path, diff); BUG_ON(ret); @@ -479,10 +486,10 @@ insert: tmp -= offset & ~((u64)root->sectorsize -1); tmp >>= root->fs_info->sb->s_blocksize_bits; tmp = max((u64)1, tmp); - tmp = min(tmp, (u64)MAX_CSUM_ITEMS(root)); - ins_size = BTRFS_CRC32_SIZE * tmp; + tmp = min(tmp, (u64)MAX_CSUM_ITEMS(root, csum_size)); + ins_size = csum_size * tmp; } else { - ins_size = BTRFS_CRC32_SIZE; + ins_size = csum_size; } ret = btrfs_insert_empty_item(trans, root, path, &file_key, ins_size); @@ -497,7 +504,7 @@ csum: item = btrfs_item_ptr(leaf, path->slots[0], struct btrfs_csum_item); ret = 0; item = (struct btrfs_csum_item *)((unsigned char *)item + - csum_offset * BTRFS_CRC32_SIZE); + csum_offset * csum_size); found: item_end = btrfs_item_ptr(leaf, path->slots[0], struct btrfs_csum_item); item_end = (struct btrfs_csum_item *)((unsigned char *)item_end + @@ -508,14 +515,14 @@ found: next_sector: if (!eb_token || - (unsigned long)item + BTRFS_CRC32_SIZE >= map_start + map_len) { + (unsigned long)item + csum_size >= map_start + map_len) { int err; if (eb_token) unmap_extent_buffer(leaf, eb_token, KM_USER1); eb_token = NULL; err = map_private_extent_buffer(leaf, (unsigned long)item, - BTRFS_CRC32_SIZE, + csum_size, &eb_token, &eb_map, &map_start, &map_len, KM_USER1); if (err) @@ -523,17 +530,17 @@ next_sector: } if (eb_token) { memcpy(eb_token + ((unsigned long)item & (PAGE_CACHE_SIZE - 1)), - §or_sum->sum, BTRFS_CRC32_SIZE); + §or_sum->sum, csum_size); } else { write_extent_buffer(leaf, §or_sum->sum, - (unsigned long)item, BTRFS_CRC32_SIZE); + (unsigned long)item, csum_size); } total_bytes += root->sectorsize; sector_sum++; if (total_bytes < sums->len) { item = (struct btrfs_csum_item *)((char *)item + - BTRFS_CRC32_SIZE); + csum_size); if (item < item_end && offset + PAGE_CACHE_SIZE == sector_sum->offset) { offset = sector_sum->offset; @@ -577,7 +584,8 @@ int btrfs_csum_truncate(struct btrfs_trans_handle *trans, new_item_span = isize - key.offset; blocks = (new_item_span + root->sectorsize - 1) >> root->fs_info->sb->s_blocksize_bits; - new_item_size = blocks * BTRFS_CRC32_SIZE; + new_item_size = blocks * + btrfs_super_csum_size(&root->fs_info->super_copy); if (new_item_size >= btrfs_item_size_nr(leaf, slot)) return 0; ret = btrfs_truncate_item(trans, root, path, new_item_size, 1); diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index caea9eed9d62..b4da53d55c82 100644 --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -714,7 +714,8 @@ static long btrfs_ioctl_clone(struct file *file, unsigned long srcfd, u64 len = olen; u64 bs = root->fs_info->sb->s_blocksize; u64 hint_byte; - + u16 csum_size = + btrfs_super_csum_size(&root->fs_info->super_copy); /* * TODO: * - split compressed inline extents. annoying: we need to @@ -964,7 +965,7 @@ static long btrfs_ioctl_clone(struct file *file, unsigned long srcfd, int coff, clen; size = btrfs_item_size_nr(leaf, slot); - coverslen = (size / BTRFS_CRC32_SIZE) << + coverslen = (size / csum_size) << root->fs_info->sb->s_blocksize_bits; printk("csums for %llu~%llu\n", key.offset, coverslen); @@ -981,12 +982,12 @@ static long btrfs_ioctl_clone(struct file *file, unsigned long srcfd, if (off > key.offset) coff = ((off - key.offset) >> root->fs_info->sb->s_blocksize_bits) * - BTRFS_CRC32_SIZE; + csum_size; clen = size - coff; if (key.offset + coverslen > off+len) clen -= ((key.offset+coverslen-off-len) >> root->fs_info->sb->s_blocksize_bits) * - BTRFS_CRC32_SIZE; + csum_size; printk(" will dup %d~%d of %d\n", coff, clen, size); diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c index 4fcfc8b1189b..c766649ad453 100644 --- a/fs/btrfs/tree-log.c +++ b/fs/btrfs/tree-log.c @@ -929,13 +929,15 @@ static noinline int replay_one_csum(struct btrfs_trans_handle *trans, int ret; u32 item_size = btrfs_item_size_nr(eb, slot); u64 cur_offset; + u16 csum_size = + btrfs_super_csum_size(&root->fs_info->super_copy); unsigned long file_bytes; struct btrfs_ordered_sum *sums; struct btrfs_sector_sum *sector_sum; struct inode *inode; unsigned long ptr; - file_bytes = (item_size / BTRFS_CRC32_SIZE) * root->sectorsize; + file_bytes = (item_size / csum_size) * root->sectorsize; inode = read_one_inode(root, key->objectid); if (!inode) { return -EIO; @@ -959,10 +961,10 @@ static noinline int replay_one_csum(struct btrfs_trans_handle *trans, ptr = btrfs_item_ptr_offset(eb, slot); while(item_size > 0) { sector_sum->offset = cur_offset; - read_extent_buffer(eb, §or_sum->sum, ptr, BTRFS_CRC32_SIZE); + read_extent_buffer(eb, §or_sum->sum, ptr, csum_size); sector_sum++; - item_size -= BTRFS_CRC32_SIZE; - ptr += BTRFS_CRC32_SIZE; + item_size -= csum_size; + ptr += csum_size; cur_offset += root->sectorsize; }