1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (C) 2013 Fusion IO. All rights reserved. 4 */ 5 6 #include <linux/slab.h> 7 #include "btrfs-tests.h" 8 #include "../ctree.h" 9 #include "../extent_io.h" 10 #include "../disk-io.h" 11 12 static int test_btrfs_split_item(u32 sectorsize, u32 nodesize) 13 { 14 struct btrfs_fs_info *fs_info; 15 struct btrfs_path *path = NULL; 16 struct btrfs_root *root = NULL; 17 struct extent_buffer *eb; 18 char *value = "mary had a little lamb"; 19 char *split1 = "mary had a little"; 20 char *split2 = " lamb"; 21 char *split3 = "mary"; 22 char *split4 = " had a little"; 23 char buf[32]; 24 struct btrfs_key key; 25 u32 value_len = strlen(value); 26 int ret = 0; 27 28 test_msg("running btrfs_split_item tests"); 29 30 fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize); 31 if (!fs_info) { 32 test_std_err(TEST_ALLOC_FS_INFO); 33 return -ENOMEM; 34 } 35 36 root = btrfs_alloc_dummy_root(fs_info); 37 if (IS_ERR(root)) { 38 test_std_err(TEST_ALLOC_ROOT); 39 ret = PTR_ERR(root); 40 goto out; 41 } 42 43 path = btrfs_alloc_path(); 44 if (!path) { 45 test_std_err(TEST_ALLOC_PATH); 46 ret = -ENOMEM; 47 goto out; 48 } 49 50 path->nodes[0] = eb = alloc_dummy_extent_buffer(fs_info, nodesize); 51 if (!eb) { 52 test_std_err(TEST_ALLOC_EXTENT_BUFFER); 53 ret = -ENOMEM; 54 goto out; 55 } 56 path->slots[0] = 0; 57 58 key.objectid = 0; 59 key.type = BTRFS_EXTENT_CSUM_KEY; 60 key.offset = 0; 61 62 btrfs_setup_item_for_insert(root, path, &key, value_len); 63 write_extent_buffer(eb, value, btrfs_item_ptr_offset(eb, 0), 64 value_len); 65 66 key.offset = 3; 67 68 /* 69 * Passing NULL trans here should be safe because we have plenty of 70 * space in this leaf to split the item without having to split the 71 * leaf. 72 */ 73 ret = btrfs_split_item(NULL, root, path, &key, 17); 74 if (ret) { 75 test_err("split item failed %d", ret); 76 goto out; 77 } 78 79 /* 80 * Read the first slot, it should have the original key and contain only 81 * 'mary had a little' 82 */ 83 btrfs_item_key_to_cpu(eb, &key, 0); 84 if (key.objectid != 0 || key.type != BTRFS_EXTENT_CSUM_KEY || 85 key.offset != 0) { 86 test_err("invalid key at slot 0"); 87 ret = -EINVAL; 88 goto out; 89 } 90 91 if (btrfs_item_size(eb, 0) != strlen(split1)) { 92 test_err("invalid len in the first split"); 93 ret = -EINVAL; 94 goto out; 95 } 96 97 read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 0), 98 strlen(split1)); 99 if (memcmp(buf, split1, strlen(split1))) { 100 test_err( 101 "data in the buffer doesn't match what it should in the first split have='%.*s' want '%s'", 102 (int)strlen(split1), buf, split1); 103 ret = -EINVAL; 104 goto out; 105 } 106 107 btrfs_item_key_to_cpu(eb, &key, 1); 108 if (key.objectid != 0 || key.type != BTRFS_EXTENT_CSUM_KEY || 109 key.offset != 3) { 110 test_err("invalid key at slot 1"); 111 ret = -EINVAL; 112 goto out; 113 } 114 115 if (btrfs_item_size(eb, 1) != strlen(split2)) { 116 test_err("invalid len in the second split"); 117 ret = -EINVAL; 118 goto out; 119 } 120 121 read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 1), 122 strlen(split2)); 123 if (memcmp(buf, split2, strlen(split2))) { 124 test_err( 125 "data in the buffer doesn't match what it should in the second split"); 126 ret = -EINVAL; 127 goto out; 128 } 129 130 key.offset = 1; 131 /* Do it again so we test memmoving the other items in the leaf */ 132 ret = btrfs_split_item(NULL, root, path, &key, 4); 133 if (ret) { 134 test_err("second split item failed %d", ret); 135 goto out; 136 } 137 138 btrfs_item_key_to_cpu(eb, &key, 0); 139 if (key.objectid != 0 || key.type != BTRFS_EXTENT_CSUM_KEY || 140 key.offset != 0) { 141 test_err("invalid key at slot 0"); 142 ret = -EINVAL; 143 goto out; 144 } 145 146 if (btrfs_item_size(eb, 0) != strlen(split3)) { 147 test_err("invalid len in the first split"); 148 ret = -EINVAL; 149 goto out; 150 } 151 152 read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 0), 153 strlen(split3)); 154 if (memcmp(buf, split3, strlen(split3))) { 155 test_err( 156 "data in the buffer doesn't match what it should in the third split"); 157 ret = -EINVAL; 158 goto out; 159 } 160 161 btrfs_item_key_to_cpu(eb, &key, 1); 162 if (key.objectid != 0 || key.type != BTRFS_EXTENT_CSUM_KEY || 163 key.offset != 1) { 164 test_err("invalid key at slot 1"); 165 ret = -EINVAL; 166 goto out; 167 } 168 169 if (btrfs_item_size(eb, 1) != strlen(split4)) { 170 test_err("invalid len in the second split"); 171 ret = -EINVAL; 172 goto out; 173 } 174 175 read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 1), 176 strlen(split4)); 177 if (memcmp(buf, split4, strlen(split4))) { 178 test_err( 179 "data in the buffer doesn't match what it should in the fourth split"); 180 ret = -EINVAL; 181 goto out; 182 } 183 184 btrfs_item_key_to_cpu(eb, &key, 2); 185 if (key.objectid != 0 || key.type != BTRFS_EXTENT_CSUM_KEY || 186 key.offset != 3) { 187 test_err("invalid key at slot 2"); 188 ret = -EINVAL; 189 goto out; 190 } 191 192 if (btrfs_item_size(eb, 2) != strlen(split2)) { 193 test_err("invalid len in the second split"); 194 ret = -EINVAL; 195 goto out; 196 } 197 198 read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 2), 199 strlen(split2)); 200 if (memcmp(buf, split2, strlen(split2))) { 201 test_err( 202 "data in the buffer doesn't match what it should in the last chunk"); 203 ret = -EINVAL; 204 goto out; 205 } 206 out: 207 btrfs_free_path(path); 208 btrfs_free_dummy_root(root); 209 btrfs_free_dummy_fs_info(fs_info); 210 return ret; 211 } 212 213 int btrfs_test_extent_buffer_operations(u32 sectorsize, u32 nodesize) 214 { 215 test_msg("running extent buffer operation tests"); 216 return test_btrfs_split_item(sectorsize, nodesize); 217 } 218