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 struct btrfs_item *item; 19 char *value = "mary had a little lamb"; 20 char *split1 = "mary had a little"; 21 char *split2 = " lamb"; 22 char *split3 = "mary"; 23 char *split4 = " had a little"; 24 char buf[32]; 25 struct btrfs_key key; 26 u32 value_len = strlen(value); 27 int ret = 0; 28 29 test_msg("running btrfs_split_item tests"); 30 31 fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize); 32 if (!fs_info) { 33 test_std_err(TEST_ALLOC_FS_INFO); 34 return -ENOMEM; 35 } 36 37 root = btrfs_alloc_dummy_root(fs_info); 38 if (IS_ERR(root)) { 39 test_std_err(TEST_ALLOC_ROOT); 40 ret = PTR_ERR(root); 41 goto out; 42 } 43 44 path = btrfs_alloc_path(); 45 if (!path) { 46 test_std_err(TEST_ALLOC_PATH); 47 ret = -ENOMEM; 48 goto out; 49 } 50 51 path->nodes[0] = eb = alloc_dummy_extent_buffer(fs_info, nodesize); 52 if (!eb) { 53 test_std_err(TEST_ALLOC_EXTENT_BUFFER); 54 ret = -ENOMEM; 55 goto out; 56 } 57 path->slots[0] = 0; 58 59 key.objectid = 0; 60 key.type = BTRFS_EXTENT_CSUM_KEY; 61 key.offset = 0; 62 63 btrfs_setup_item_for_insert(root, path, &key, value_len); 64 item = btrfs_item_nr(0); 65 write_extent_buffer(eb, value, btrfs_item_ptr_offset(eb, 0), 66 value_len); 67 68 key.offset = 3; 69 70 /* 71 * Passing NULL trans here should be safe because we have plenty of 72 * space in this leaf to split the item without having to split the 73 * leaf. 74 */ 75 ret = btrfs_split_item(NULL, root, path, &key, 17); 76 if (ret) { 77 test_err("split item failed %d", ret); 78 goto out; 79 } 80 81 /* 82 * Read the first slot, it should have the original key and contain only 83 * 'mary had a little' 84 */ 85 btrfs_item_key_to_cpu(eb, &key, 0); 86 if (key.objectid != 0 || key.type != BTRFS_EXTENT_CSUM_KEY || 87 key.offset != 0) { 88 test_err("invalid key at slot 0"); 89 ret = -EINVAL; 90 goto out; 91 } 92 93 item = btrfs_item_nr(0); 94 if (btrfs_item_size(eb, item) != strlen(split1)) { 95 test_err("invalid len in the first split"); 96 ret = -EINVAL; 97 goto out; 98 } 99 100 read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 0), 101 strlen(split1)); 102 if (memcmp(buf, split1, strlen(split1))) { 103 test_err( 104 "data in the buffer doesn't match what it should in the first split have='%.*s' want '%s'", 105 (int)strlen(split1), buf, split1); 106 ret = -EINVAL; 107 goto out; 108 } 109 110 btrfs_item_key_to_cpu(eb, &key, 1); 111 if (key.objectid != 0 || key.type != BTRFS_EXTENT_CSUM_KEY || 112 key.offset != 3) { 113 test_err("invalid key at slot 1"); 114 ret = -EINVAL; 115 goto out; 116 } 117 118 item = btrfs_item_nr(1); 119 if (btrfs_item_size(eb, item) != strlen(split2)) { 120 test_err("invalid len in the second split"); 121 ret = -EINVAL; 122 goto out; 123 } 124 125 read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 1), 126 strlen(split2)); 127 if (memcmp(buf, split2, strlen(split2))) { 128 test_err( 129 "data in the buffer doesn't match what it should in the second split"); 130 ret = -EINVAL; 131 goto out; 132 } 133 134 key.offset = 1; 135 /* Do it again so we test memmoving the other items in the leaf */ 136 ret = btrfs_split_item(NULL, root, path, &key, 4); 137 if (ret) { 138 test_err("second split item failed %d", ret); 139 goto out; 140 } 141 142 btrfs_item_key_to_cpu(eb, &key, 0); 143 if (key.objectid != 0 || key.type != BTRFS_EXTENT_CSUM_KEY || 144 key.offset != 0) { 145 test_err("invalid key at slot 0"); 146 ret = -EINVAL; 147 goto out; 148 } 149 150 item = btrfs_item_nr(0); 151 if (btrfs_item_size(eb, item) != strlen(split3)) { 152 test_err("invalid len in the first split"); 153 ret = -EINVAL; 154 goto out; 155 } 156 157 read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 0), 158 strlen(split3)); 159 if (memcmp(buf, split3, strlen(split3))) { 160 test_err( 161 "data in the buffer doesn't match what it should in the third split"); 162 ret = -EINVAL; 163 goto out; 164 } 165 166 btrfs_item_key_to_cpu(eb, &key, 1); 167 if (key.objectid != 0 || key.type != BTRFS_EXTENT_CSUM_KEY || 168 key.offset != 1) { 169 test_err("invalid key at slot 1"); 170 ret = -EINVAL; 171 goto out; 172 } 173 174 item = btrfs_item_nr(1); 175 if (btrfs_item_size(eb, item) != strlen(split4)) { 176 test_err("invalid len in the second split"); 177 ret = -EINVAL; 178 goto out; 179 } 180 181 read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 1), 182 strlen(split4)); 183 if (memcmp(buf, split4, strlen(split4))) { 184 test_err( 185 "data in the buffer doesn't match what it should in the fourth split"); 186 ret = -EINVAL; 187 goto out; 188 } 189 190 btrfs_item_key_to_cpu(eb, &key, 2); 191 if (key.objectid != 0 || key.type != BTRFS_EXTENT_CSUM_KEY || 192 key.offset != 3) { 193 test_err("invalid key at slot 2"); 194 ret = -EINVAL; 195 goto out; 196 } 197 198 item = btrfs_item_nr(2); 199 if (btrfs_item_size(eb, item) != strlen(split2)) { 200 test_err("invalid len in the second split"); 201 ret = -EINVAL; 202 goto out; 203 } 204 205 read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 2), 206 strlen(split2)); 207 if (memcmp(buf, split2, strlen(split2))) { 208 test_err( 209 "data in the buffer doesn't match what it should in the last chunk"); 210 ret = -EINVAL; 211 goto out; 212 } 213 out: 214 btrfs_free_path(path); 215 btrfs_free_dummy_root(root); 216 btrfs_free_dummy_fs_info(fs_info); 217 return ret; 218 } 219 220 int btrfs_test_extent_buffer_operations(u32 sectorsize, u32 nodesize) 221 { 222 test_msg("running extent buffer operation tests"); 223 return test_btrfs_split_item(sectorsize, nodesize); 224 } 225