| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * Copyright (C) 2013 Fusion IO. All rights reserved. |
| */ |
| |
| #include <linux/slab.h> |
| #include "btrfs-tests.h" |
| #include "../ctree.h" |
| #include "../extent_io.h" |
| #include "../disk-io.h" |
| |
| static int test_btrfs_split_item(u32 sectorsize, u32 nodesize) |
| { |
| struct btrfs_fs_info *fs_info; |
| struct btrfs_path *path = NULL; |
| struct btrfs_root *root = NULL; |
| struct extent_buffer *eb; |
| char *value = "mary had a little lamb"; |
| char *split1 = "mary had a little"; |
| char *split2 = " lamb"; |
| char *split3 = "mary"; |
| char *split4 = " had a little"; |
| char buf[32]; |
| struct btrfs_key key; |
| u32 value_len = strlen(value); |
| int ret = 0; |
| |
| test_msg("running btrfs_split_item tests"); |
| |
| fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize); |
| if (!fs_info) { |
| test_std_err(TEST_ALLOC_FS_INFO); |
| return -ENOMEM; |
| } |
| |
| root = btrfs_alloc_dummy_root(fs_info); |
| if (IS_ERR(root)) { |
| test_std_err(TEST_ALLOC_ROOT); |
| ret = PTR_ERR(root); |
| goto out; |
| } |
| |
| path = btrfs_alloc_path(); |
| if (!path) { |
| test_std_err(TEST_ALLOC_PATH); |
| ret = -ENOMEM; |
| goto out; |
| } |
| |
| eb = alloc_dummy_extent_buffer(fs_info, nodesize); |
| path->nodes[0] = eb; |
| if (!eb) { |
| test_std_err(TEST_ALLOC_EXTENT_BUFFER); |
| ret = -ENOMEM; |
| goto out; |
| } |
| path->slots[0] = 0; |
| |
| key.objectid = 0; |
| key.type = BTRFS_EXTENT_CSUM_KEY; |
| key.offset = 0; |
| |
| btrfs_setup_item_for_insert(root, path, &key, value_len); |
| write_extent_buffer(eb, value, btrfs_item_ptr_offset(eb, 0), |
| value_len); |
| |
| key.offset = 3; |
| |
| /* |
| * Passing NULL trans here should be safe because we have plenty of |
| * space in this leaf to split the item without having to split the |
| * leaf. |
| */ |
| ret = btrfs_split_item(NULL, root, path, &key, 17); |
| if (ret) { |
| test_err("split item failed %d", ret); |
| goto out; |
| } |
| |
| /* |
| * Read the first slot, it should have the original key and contain only |
| * 'mary had a little' |
| */ |
| btrfs_item_key_to_cpu(eb, &key, 0); |
| if (key.objectid != 0 || key.type != BTRFS_EXTENT_CSUM_KEY || |
| key.offset != 0) { |
| test_err("invalid key at slot 0"); |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| if (btrfs_item_size(eb, 0) != strlen(split1)) { |
| test_err("invalid len in the first split"); |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 0), |
| strlen(split1)); |
| if (memcmp(buf, split1, strlen(split1))) { |
| test_err( |
| "data in the buffer doesn't match what it should in the first split have='%.*s' want '%s'", |
| (int)strlen(split1), buf, split1); |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| btrfs_item_key_to_cpu(eb, &key, 1); |
| if (key.objectid != 0 || key.type != BTRFS_EXTENT_CSUM_KEY || |
| key.offset != 3) { |
| test_err("invalid key at slot 1"); |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| if (btrfs_item_size(eb, 1) != strlen(split2)) { |
| test_err("invalid len in the second split"); |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 1), |
| strlen(split2)); |
| if (memcmp(buf, split2, strlen(split2))) { |
| test_err( |
| "data in the buffer doesn't match what it should in the second split"); |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| key.offset = 1; |
| /* Do it again so we test memmoving the other items in the leaf */ |
| ret = btrfs_split_item(NULL, root, path, &key, 4); |
| if (ret) { |
| test_err("second split item failed %d", ret); |
| goto out; |
| } |
| |
| btrfs_item_key_to_cpu(eb, &key, 0); |
| if (key.objectid != 0 || key.type != BTRFS_EXTENT_CSUM_KEY || |
| key.offset != 0) { |
| test_err("invalid key at slot 0"); |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| if (btrfs_item_size(eb, 0) != strlen(split3)) { |
| test_err("invalid len in the first split"); |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 0), |
| strlen(split3)); |
| if (memcmp(buf, split3, strlen(split3))) { |
| test_err( |
| "data in the buffer doesn't match what it should in the third split"); |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| btrfs_item_key_to_cpu(eb, &key, 1); |
| if (key.objectid != 0 || key.type != BTRFS_EXTENT_CSUM_KEY || |
| key.offset != 1) { |
| test_err("invalid key at slot 1"); |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| if (btrfs_item_size(eb, 1) != strlen(split4)) { |
| test_err("invalid len in the second split"); |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 1), |
| strlen(split4)); |
| if (memcmp(buf, split4, strlen(split4))) { |
| test_err( |
| "data in the buffer doesn't match what it should in the fourth split"); |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| btrfs_item_key_to_cpu(eb, &key, 2); |
| if (key.objectid != 0 || key.type != BTRFS_EXTENT_CSUM_KEY || |
| key.offset != 3) { |
| test_err("invalid key at slot 2"); |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| if (btrfs_item_size(eb, 2) != strlen(split2)) { |
| test_err("invalid len in the second split"); |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 2), |
| strlen(split2)); |
| if (memcmp(buf, split2, strlen(split2))) { |
| test_err( |
| "data in the buffer doesn't match what it should in the last chunk"); |
| ret = -EINVAL; |
| goto out; |
| } |
| out: |
| btrfs_free_path(path); |
| btrfs_free_dummy_root(root); |
| btrfs_free_dummy_fs_info(fs_info); |
| return ret; |
| } |
| |
| int btrfs_test_extent_buffer_operations(u32 sectorsize, u32 nodesize) |
| { |
| test_msg("running extent buffer operation tests"); |
| return test_btrfs_split_item(sectorsize, nodesize); |
| } |