1 /* 2 * Copyright (C) 2013 Fusion IO. All rights reserved. 3 * 4 * This program is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU General Public 6 * License v2 as published by the Free Software Foundation. 7 * 8 * This program is distributed in the hope that it will be useful, 9 * but WITHOUT ANY WARRANTY; without even the implied warranty of 10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 11 * General Public License for more details. 12 * 13 * You should have received a copy of the GNU General Public 14 * License along with this program; if not, write to the 15 * Free Software Foundation, Inc., 59 Temple Place - Suite 330, 16 * Boston, MA 021110-1307, USA. 17 */ 18 19 #include <linux/slab.h> 20 #include "btrfs-tests.h" 21 #include "../ctree.h" 22 #include "../extent_io.h" 23 #include "../disk-io.h" 24 25 static int test_btrfs_split_item(u32 sectorsize, u32 nodesize) 26 { 27 struct btrfs_fs_info *fs_info; 28 struct btrfs_path *path = NULL; 29 struct btrfs_root *root = NULL; 30 struct extent_buffer *eb; 31 struct btrfs_item *item; 32 char *value = "mary had a little lamb"; 33 char *split1 = "mary had a little"; 34 char *split2 = " lamb"; 35 char *split3 = "mary"; 36 char *split4 = " had a little"; 37 char buf[32]; 38 struct btrfs_key key; 39 u32 value_len = strlen(value); 40 int ret = 0; 41 42 test_msg("Running btrfs_split_item tests\n"); 43 44 fs_info = btrfs_alloc_dummy_fs_info(); 45 if (!fs_info) { 46 test_msg("Could not allocate fs_info\n"); 47 return -ENOMEM; 48 } 49 50 root = btrfs_alloc_dummy_root(fs_info, sectorsize, nodesize); 51 if (IS_ERR(root)) { 52 test_msg("Could not allocate root\n"); 53 ret = PTR_ERR(root); 54 goto out; 55 } 56 57 path = btrfs_alloc_path(); 58 if (!path) { 59 test_msg("Could not allocate path\n"); 60 ret = -ENOMEM; 61 goto out; 62 } 63 64 path->nodes[0] = eb = alloc_dummy_extent_buffer(NULL, nodesize, 65 nodesize); 66 if (!eb) { 67 test_msg("Could not allocate dummy buffer\n"); 68 ret = -ENOMEM; 69 goto out; 70 } 71 path->slots[0] = 0; 72 73 key.objectid = 0; 74 key.type = BTRFS_EXTENT_CSUM_KEY; 75 key.offset = 0; 76 77 setup_items_for_insert(root, path, &key, &value_len, value_len, 78 value_len + sizeof(struct btrfs_item), 1); 79 item = btrfs_item_nr(0); 80 write_extent_buffer(eb, value, btrfs_item_ptr_offset(eb, 0), 81 value_len); 82 83 key.offset = 3; 84 85 /* 86 * Passing NULL trans here should be safe because we have plenty of 87 * space in this leaf to split the item without having to split the 88 * leaf. 89 */ 90 ret = btrfs_split_item(NULL, root, path, &key, 17); 91 if (ret) { 92 test_msg("Split item failed %d\n", ret); 93 goto out; 94 } 95 96 /* 97 * Read the first slot, it should have the original key and contain only 98 * 'mary had a little' 99 */ 100 btrfs_item_key_to_cpu(eb, &key, 0); 101 if (key.objectid != 0 || key.type != BTRFS_EXTENT_CSUM_KEY || 102 key.offset != 0) { 103 test_msg("Invalid key at slot 0\n"); 104 ret = -EINVAL; 105 goto out; 106 } 107 108 item = btrfs_item_nr(0); 109 if (btrfs_item_size(eb, item) != strlen(split1)) { 110 test_msg("Invalid len in the first split\n"); 111 ret = -EINVAL; 112 goto out; 113 } 114 115 read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 0), 116 strlen(split1)); 117 if (memcmp(buf, split1, strlen(split1))) { 118 test_msg("Data in the buffer doesn't match what it should " 119 "in the first split have='%.*s' want '%s'\n", 120 (int)strlen(split1), buf, split1); 121 ret = -EINVAL; 122 goto out; 123 } 124 125 btrfs_item_key_to_cpu(eb, &key, 1); 126 if (key.objectid != 0 || key.type != BTRFS_EXTENT_CSUM_KEY || 127 key.offset != 3) { 128 test_msg("Invalid key at slot 1\n"); 129 ret = -EINVAL; 130 goto out; 131 } 132 133 item = btrfs_item_nr(1); 134 if (btrfs_item_size(eb, item) != strlen(split2)) { 135 test_msg("Invalid len in the second split\n"); 136 ret = -EINVAL; 137 goto out; 138 } 139 140 read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 1), 141 strlen(split2)); 142 if (memcmp(buf, split2, strlen(split2))) { 143 test_msg("Data in the buffer doesn't match what it should " 144 "in the second split\n"); 145 ret = -EINVAL; 146 goto out; 147 } 148 149 key.offset = 1; 150 /* Do it again so we test memmoving the other items in the leaf */ 151 ret = btrfs_split_item(NULL, root, path, &key, 4); 152 if (ret) { 153 test_msg("Second split item failed %d\n", ret); 154 goto out; 155 } 156 157 btrfs_item_key_to_cpu(eb, &key, 0); 158 if (key.objectid != 0 || key.type != BTRFS_EXTENT_CSUM_KEY || 159 key.offset != 0) { 160 test_msg("Invalid key at slot 0\n"); 161 ret = -EINVAL; 162 goto out; 163 } 164 165 item = btrfs_item_nr(0); 166 if (btrfs_item_size(eb, item) != strlen(split3)) { 167 test_msg("Invalid len in the first split\n"); 168 ret = -EINVAL; 169 goto out; 170 } 171 172 read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 0), 173 strlen(split3)); 174 if (memcmp(buf, split3, strlen(split3))) { 175 test_msg("Data in the buffer doesn't match what it should " 176 "in the third split"); 177 ret = -EINVAL; 178 goto out; 179 } 180 181 btrfs_item_key_to_cpu(eb, &key, 1); 182 if (key.objectid != 0 || key.type != BTRFS_EXTENT_CSUM_KEY || 183 key.offset != 1) { 184 test_msg("Invalid key at slot 1\n"); 185 ret = -EINVAL; 186 goto out; 187 } 188 189 item = btrfs_item_nr(1); 190 if (btrfs_item_size(eb, item) != strlen(split4)) { 191 test_msg("Invalid len in the second split\n"); 192 ret = -EINVAL; 193 goto out; 194 } 195 196 read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 1), 197 strlen(split4)); 198 if (memcmp(buf, split4, strlen(split4))) { 199 test_msg("Data in the buffer doesn't match what it should " 200 "in the fourth split\n"); 201 ret = -EINVAL; 202 goto out; 203 } 204 205 btrfs_item_key_to_cpu(eb, &key, 2); 206 if (key.objectid != 0 || key.type != BTRFS_EXTENT_CSUM_KEY || 207 key.offset != 3) { 208 test_msg("Invalid key at slot 2\n"); 209 ret = -EINVAL; 210 goto out; 211 } 212 213 item = btrfs_item_nr(2); 214 if (btrfs_item_size(eb, item) != strlen(split2)) { 215 test_msg("Invalid len in the second split\n"); 216 ret = -EINVAL; 217 goto out; 218 } 219 220 read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 2), 221 strlen(split2)); 222 if (memcmp(buf, split2, strlen(split2))) { 223 test_msg("Data in the buffer doesn't match what it should " 224 "in the last chunk\n"); 225 ret = -EINVAL; 226 goto out; 227 } 228 out: 229 btrfs_free_path(path); 230 btrfs_free_dummy_root(root); 231 btrfs_free_dummy_fs_info(fs_info); 232 return ret; 233 } 234 235 int btrfs_test_extent_buffer_operations(u32 sectorsize, u32 nodesize) 236 { 237 test_msg("Running extent buffer operation tests\n"); 238 return test_btrfs_split_item(sectorsize, nodesize); 239 } 240