diff options
Diffstat (limited to 'fs/btrfs/tests/extent-buffer-tests.c')
| -rw-r--r-- | fs/btrfs/tests/extent-buffer-tests.c | 218 |
1 files changed, 218 insertions, 0 deletions
diff --git a/fs/btrfs/tests/extent-buffer-tests.c b/fs/btrfs/tests/extent-buffer-tests.c new file mode 100644 index 000000000..b7d181a08 --- /dev/null +++ b/fs/btrfs/tests/extent-buffer-tests.c @@ -0,0 +1,218 @@ +// 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); +} |