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_err("could not allocate fs_info"); 34 return -ENOMEM; 35 } 36 37 root = btrfs_alloc_dummy_root(fs_info); 38 if (IS_ERR(root)) { 39 test_err("could not allocate root"); 40 ret = PTR_ERR(root); 41 goto out; 42 } 43 44 path = btrfs_alloc_path(); 45 if (!path) { 46 test_err("could not allocate 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_err("could not allocate dummy 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 setup_items_for_insert(root, path, &key, &value_len, value_len, 64 value_len + sizeof(struct btrfs_item), 1); 65 item = btrfs_item_nr(0); 66 write_extent_buffer(eb, value, btrfs_item_ptr_offset(eb, 0), 67 value_len); 68 69 key.offset = 3; 70 71 /* 72 * Passing NULL trans here should be safe because we have plenty of 73 * space in this leaf to split the item without having to split the 74 * leaf. 75 */ 76 ret = btrfs_split_item(NULL, root, path, &key, 17); 77 if (ret) { 78 test_err("split item failed %d", ret); 79 goto out; 80 } 81 82 /* 83 * Read the first slot, it should have the original key and contain only 84 * 'mary had a little' 85 */ 86 btrfs_item_key_to_cpu(eb, &key, 0); 87 if (key.objectid != 0 || key.type != BTRFS_EXTENT_CSUM_KEY || 88 key.offset != 0) { 89 test_err("invalid key at slot 0"); 90 ret = -EINVAL; 91 goto out; 92 } 93 94 item = btrfs_item_nr(0); 95 if (btrfs_item_size(eb, item) != strlen(split1)) { 96 test_err("invalid len in the first split"); 97 ret = -EINVAL; 98 goto out; 99 } 100 101 read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 0), 102 strlen(split1)); 103 if (memcmp(buf, split1, strlen(split1))) { 104 test_err( 105 "data in the buffer doesn't match what it should in the first split have='%.*s' want '%s'", 106 (int)strlen(split1), buf, split1); 107 ret = -EINVAL; 108 goto out; 109 } 110 111 btrfs_item_key_to_cpu(eb, &key, 1); 112 if (key.objectid != 0 || key.type != BTRFS_EXTENT_CSUM_KEY || 113 key.offset != 3) { 114 test_err("invalid key at slot 1"); 115 ret = -EINVAL; 116 goto out; 117 } 118 119 item = btrfs_item_nr(1); 120 if (btrfs_item_size(eb, item) != strlen(split2)) { 121 test_err("invalid len in the second split"); 122 ret = -EINVAL; 123 goto out; 124 } 125 126 read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 1), 127 strlen(split2)); 128 if (memcmp(buf, split2, strlen(split2))) { 129 test_err( 130 "data in the buffer doesn't match what it should in the second split"); 131 ret = -EINVAL; 132 goto out; 133 } 134 135 key.offset = 1; 136 /* Do it again so we test memmoving the other items in the leaf */ 137 ret = btrfs_split_item(NULL, root, path, &key, 4); 138 if (ret) { 139 test_err("second split item failed %d", ret); 140 goto out; 141 } 142 143 btrfs_item_key_to_cpu(eb, &key, 0); 144 if (key.objectid != 0 || key.type != BTRFS_EXTENT_CSUM_KEY || 145 key.offset != 0) { 146 test_err("invalid key at slot 0"); 147 ret = -EINVAL; 148 goto out; 149 } 150 151 item = btrfs_item_nr(0); 152 if (btrfs_item_size(eb, item) != strlen(split3)) { 153 test_err("invalid len in the first split"); 154 ret = -EINVAL; 155 goto out; 156 } 157 158 read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 0), 159 strlen(split3)); 160 if (memcmp(buf, split3, strlen(split3))) { 161 test_err( 162 "data in the buffer doesn't match what it should in the third split"); 163 ret = -EINVAL; 164 goto out; 165 } 166 167 btrfs_item_key_to_cpu(eb, &key, 1); 168 if (key.objectid != 0 || key.type != BTRFS_EXTENT_CSUM_KEY || 169 key.offset != 1) { 170 test_err("invalid key at slot 1"); 171 ret = -EINVAL; 172 goto out; 173 } 174 175 item = btrfs_item_nr(1); 176 if (btrfs_item_size(eb, item) != strlen(split4)) { 177 test_err("invalid len in the second split"); 178 ret = -EINVAL; 179 goto out; 180 } 181 182 read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 1), 183 strlen(split4)); 184 if (memcmp(buf, split4, strlen(split4))) { 185 test_err( 186 "data in the buffer doesn't match what it should in the fourth split"); 187 ret = -EINVAL; 188 goto out; 189 } 190 191 btrfs_item_key_to_cpu(eb, &key, 2); 192 if (key.objectid != 0 || key.type != BTRFS_EXTENT_CSUM_KEY || 193 key.offset != 3) { 194 test_err("invalid key at slot 2"); 195 ret = -EINVAL; 196 goto out; 197 } 198 199 item = btrfs_item_nr(2); 200 if (btrfs_item_size(eb, item) != strlen(split2)) { 201 test_err("invalid len in the second split"); 202 ret = -EINVAL; 203 goto out; 204 } 205 206 read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 2), 207 strlen(split2)); 208 if (memcmp(buf, split2, strlen(split2))) { 209 test_err( 210 "data in the buffer doesn't match what it should in the last chunk"); 211 ret = -EINVAL; 212 goto out; 213 } 214 out: 215 btrfs_free_path(path); 216 btrfs_free_dummy_root(root); 217 btrfs_free_dummy_fs_info(fs_info); 218 return ret; 219 } 220 221 int btrfs_test_extent_buffer_operations(u32 sectorsize, u32 nodesize) 222 { 223 test_msg("running extent buffer operation tests"); 224 return test_btrfs_split_item(sectorsize, nodesize); 225 } 226