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(nodesize, sectorsize); 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); 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(fs_info, nodesize); 65 if (!eb) { 66 test_msg("Could not allocate dummy buffer\n"); 67 ret = -ENOMEM; 68 goto out; 69 } 70 path->slots[0] = 0; 71 72 key.objectid = 0; 73 key.type = BTRFS_EXTENT_CSUM_KEY; 74 key.offset = 0; 75 76 setup_items_for_insert(root, path, &key, &value_len, value_len, 77 value_len + sizeof(struct btrfs_item), 1); 78 item = btrfs_item_nr(0); 79 write_extent_buffer(eb, value, btrfs_item_ptr_offset(eb, 0), 80 value_len); 81 82 key.offset = 3; 83 84 /* 85 * Passing NULL trans here should be safe because we have plenty of 86 * space in this leaf to split the item without having to split the 87 * leaf. 88 */ 89 ret = btrfs_split_item(NULL, root, path, &key, 17); 90 if (ret) { 91 test_msg("Split item failed %d\n", ret); 92 goto out; 93 } 94 95 /* 96 * Read the first slot, it should have the original key and contain only 97 * 'mary had a little' 98 */ 99 btrfs_item_key_to_cpu(eb, &key, 0); 100 if (key.objectid != 0 || key.type != BTRFS_EXTENT_CSUM_KEY || 101 key.offset != 0) { 102 test_msg("Invalid key at slot 0\n"); 103 ret = -EINVAL; 104 goto out; 105 } 106 107 item = btrfs_item_nr(0); 108 if (btrfs_item_size(eb, item) != strlen(split1)) { 109 test_msg("Invalid len in the first split\n"); 110 ret = -EINVAL; 111 goto out; 112 } 113 114 read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 0), 115 strlen(split1)); 116 if (memcmp(buf, split1, strlen(split1))) { 117 test_msg("Data in the buffer doesn't match what it should " 118 "in the first split have='%.*s' want '%s'\n", 119 (int)strlen(split1), buf, split1); 120 ret = -EINVAL; 121 goto out; 122 } 123 124 btrfs_item_key_to_cpu(eb, &key, 1); 125 if (key.objectid != 0 || key.type != BTRFS_EXTENT_CSUM_KEY || 126 key.offset != 3) { 127 test_msg("Invalid key at slot 1\n"); 128 ret = -EINVAL; 129 goto out; 130 } 131 132 item = btrfs_item_nr(1); 133 if (btrfs_item_size(eb, item) != strlen(split2)) { 134 test_msg("Invalid len in the second split\n"); 135 ret = -EINVAL; 136 goto out; 137 } 138 139 read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 1), 140 strlen(split2)); 141 if (memcmp(buf, split2, strlen(split2))) { 142 test_msg("Data in the buffer doesn't match what it should " 143 "in the second split\n"); 144 ret = -EINVAL; 145 goto out; 146 } 147 148 key.offset = 1; 149 /* Do it again so we test memmoving the other items in the leaf */ 150 ret = btrfs_split_item(NULL, root, path, &key, 4); 151 if (ret) { 152 test_msg("Second split item failed %d\n", ret); 153 goto out; 154 } 155 156 btrfs_item_key_to_cpu(eb, &key, 0); 157 if (key.objectid != 0 || key.type != BTRFS_EXTENT_CSUM_KEY || 158 key.offset != 0) { 159 test_msg("Invalid key at slot 0\n"); 160 ret = -EINVAL; 161 goto out; 162 } 163 164 item = btrfs_item_nr(0); 165 if (btrfs_item_size(eb, item) != strlen(split3)) { 166 test_msg("Invalid len in the first split\n"); 167 ret = -EINVAL; 168 goto out; 169 } 170 171 read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 0), 172 strlen(split3)); 173 if (memcmp(buf, split3, strlen(split3))) { 174 test_msg("Data in the buffer doesn't match what it should " 175 "in the third split"); 176 ret = -EINVAL; 177 goto out; 178 } 179 180 btrfs_item_key_to_cpu(eb, &key, 1); 181 if (key.objectid != 0 || key.type != BTRFS_EXTENT_CSUM_KEY || 182 key.offset != 1) { 183 test_msg("Invalid key at slot 1\n"); 184 ret = -EINVAL; 185 goto out; 186 } 187 188 item = btrfs_item_nr(1); 189 if (btrfs_item_size(eb, item) != strlen(split4)) { 190 test_msg("Invalid len in the second split\n"); 191 ret = -EINVAL; 192 goto out; 193 } 194 195 read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 1), 196 strlen(split4)); 197 if (memcmp(buf, split4, strlen(split4))) { 198 test_msg("Data in the buffer doesn't match what it should " 199 "in the fourth split\n"); 200 ret = -EINVAL; 201 goto out; 202 } 203 204 btrfs_item_key_to_cpu(eb, &key, 2); 205 if (key.objectid != 0 || key.type != BTRFS_EXTENT_CSUM_KEY || 206 key.offset != 3) { 207 test_msg("Invalid key at slot 2\n"); 208 ret = -EINVAL; 209 goto out; 210 } 211 212 item = btrfs_item_nr(2); 213 if (btrfs_item_size(eb, item) != strlen(split2)) { 214 test_msg("Invalid len in the second split\n"); 215 ret = -EINVAL; 216 goto out; 217 } 218 219 read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 2), 220 strlen(split2)); 221 if (memcmp(buf, split2, strlen(split2))) { 222 test_msg("Data in the buffer doesn't match what it should " 223 "in the last chunk\n"); 224 ret = -EINVAL; 225 goto out; 226 } 227 out: 228 btrfs_free_path(path); 229 btrfs_free_dummy_root(root); 230 btrfs_free_dummy_fs_info(fs_info); 231 return ret; 232 } 233 234 int btrfs_test_extent_buffer_operations(u32 sectorsize, u32 nodesize) 235 { 236 test_msg("Running extent buffer operation tests\n"); 237 return test_btrfs_split_item(sectorsize, nodesize); 238 } 239