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_path *path; 28 struct btrfs_root *root; 29 struct extent_buffer *eb; 30 struct btrfs_item *item; 31 char *value = "mary had a little lamb"; 32 char *split1 = "mary had a little"; 33 char *split2 = " lamb"; 34 char *split3 = "mary"; 35 char *split4 = " had a little"; 36 char buf[32]; 37 struct btrfs_key key; 38 u32 value_len = strlen(value); 39 int ret = 0; 40 41 test_msg("Running btrfs_split_item tests\n"); 42 43 root = btrfs_alloc_dummy_root(sectorsize, nodesize); 44 if (IS_ERR(root)) { 45 test_msg("Could not allocate root\n"); 46 return PTR_ERR(root); 47 } 48 49 path = btrfs_alloc_path(); 50 if (!path) { 51 test_msg("Could not allocate path\n"); 52 kfree(root); 53 return -ENOMEM; 54 } 55 56 path->nodes[0] = eb = alloc_dummy_extent_buffer(NULL, nodesize, 57 nodesize); 58 if (!eb) { 59 test_msg("Could not allocate dummy buffer\n"); 60 ret = -ENOMEM; 61 goto out; 62 } 63 path->slots[0] = 0; 64 65 key.objectid = 0; 66 key.type = BTRFS_EXTENT_CSUM_KEY; 67 key.offset = 0; 68 69 setup_items_for_insert(root, path, &key, &value_len, value_len, 70 value_len + sizeof(struct btrfs_item), 1); 71 item = btrfs_item_nr(0); 72 write_extent_buffer(eb, value, btrfs_item_ptr_offset(eb, 0), 73 value_len); 74 75 key.offset = 3; 76 77 /* 78 * Passing NULL trans here should be safe because we have plenty of 79 * space in this leaf to split the item without having to split the 80 * leaf. 81 */ 82 ret = btrfs_split_item(NULL, root, path, &key, 17); 83 if (ret) { 84 test_msg("Split item failed %d\n", ret); 85 goto out; 86 } 87 88 /* 89 * Read the first slot, it should have the original key and contain only 90 * 'mary had a little' 91 */ 92 btrfs_item_key_to_cpu(eb, &key, 0); 93 if (key.objectid != 0 || key.type != BTRFS_EXTENT_CSUM_KEY || 94 key.offset != 0) { 95 test_msg("Invalid key at slot 0\n"); 96 ret = -EINVAL; 97 goto out; 98 } 99 100 item = btrfs_item_nr(0); 101 if (btrfs_item_size(eb, item) != strlen(split1)) { 102 test_msg("Invalid len in the first split\n"); 103 ret = -EINVAL; 104 goto out; 105 } 106 107 read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 0), 108 strlen(split1)); 109 if (memcmp(buf, split1, strlen(split1))) { 110 test_msg("Data in the buffer doesn't match what it should " 111 "in the first split have='%.*s' want '%s'\n", 112 (int)strlen(split1), buf, split1); 113 ret = -EINVAL; 114 goto out; 115 } 116 117 btrfs_item_key_to_cpu(eb, &key, 1); 118 if (key.objectid != 0 || key.type != BTRFS_EXTENT_CSUM_KEY || 119 key.offset != 3) { 120 test_msg("Invalid key at slot 1\n"); 121 ret = -EINVAL; 122 goto out; 123 } 124 125 item = btrfs_item_nr(1); 126 if (btrfs_item_size(eb, item) != strlen(split2)) { 127 test_msg("Invalid len in the second split\n"); 128 ret = -EINVAL; 129 goto out; 130 } 131 132 read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 1), 133 strlen(split2)); 134 if (memcmp(buf, split2, strlen(split2))) { 135 test_msg("Data in the buffer doesn't match what it should " 136 "in the second split\n"); 137 ret = -EINVAL; 138 goto out; 139 } 140 141 key.offset = 1; 142 /* Do it again so we test memmoving the other items in the leaf */ 143 ret = btrfs_split_item(NULL, root, path, &key, 4); 144 if (ret) { 145 test_msg("Second split item failed %d\n", ret); 146 goto out; 147 } 148 149 btrfs_item_key_to_cpu(eb, &key, 0); 150 if (key.objectid != 0 || key.type != BTRFS_EXTENT_CSUM_KEY || 151 key.offset != 0) { 152 test_msg("Invalid key at slot 0\n"); 153 ret = -EINVAL; 154 goto out; 155 } 156 157 item = btrfs_item_nr(0); 158 if (btrfs_item_size(eb, item) != strlen(split3)) { 159 test_msg("Invalid len in the first split\n"); 160 ret = -EINVAL; 161 goto out; 162 } 163 164 read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 0), 165 strlen(split3)); 166 if (memcmp(buf, split3, strlen(split3))) { 167 test_msg("Data in the buffer doesn't match what it should " 168 "in the third split"); 169 ret = -EINVAL; 170 goto out; 171 } 172 173 btrfs_item_key_to_cpu(eb, &key, 1); 174 if (key.objectid != 0 || key.type != BTRFS_EXTENT_CSUM_KEY || 175 key.offset != 1) { 176 test_msg("Invalid key at slot 1\n"); 177 ret = -EINVAL; 178 goto out; 179 } 180 181 item = btrfs_item_nr(1); 182 if (btrfs_item_size(eb, item) != strlen(split4)) { 183 test_msg("Invalid len in the second split\n"); 184 ret = -EINVAL; 185 goto out; 186 } 187 188 read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 1), 189 strlen(split4)); 190 if (memcmp(buf, split4, strlen(split4))) { 191 test_msg("Data in the buffer doesn't match what it should " 192 "in the fourth split\n"); 193 ret = -EINVAL; 194 goto out; 195 } 196 197 btrfs_item_key_to_cpu(eb, &key, 2); 198 if (key.objectid != 0 || key.type != BTRFS_EXTENT_CSUM_KEY || 199 key.offset != 3) { 200 test_msg("Invalid key at slot 2\n"); 201 ret = -EINVAL; 202 goto out; 203 } 204 205 item = btrfs_item_nr(2); 206 if (btrfs_item_size(eb, item) != strlen(split2)) { 207 test_msg("Invalid len in the second split\n"); 208 ret = -EINVAL; 209 goto out; 210 } 211 212 read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 2), 213 strlen(split2)); 214 if (memcmp(buf, split2, strlen(split2))) { 215 test_msg("Data in the buffer doesn't match what it should " 216 "in the last chunk\n"); 217 ret = -EINVAL; 218 goto out; 219 } 220 out: 221 btrfs_free_path(path); 222 kfree(root); 223 return ret; 224 } 225 226 int btrfs_test_extent_buffer_operations(u32 sectorsize, u32 nodesize) 227 { 228 test_msg("Running extent buffer operation tests\n"); 229 return test_btrfs_split_item(sectorsize, nodesize); 230 } 231