2 * Copyright (c) 2013 Grzegorz Kostka (kostka.grzegorz@gmail.com)
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6 * Copyright (c) 2012 Martin Sucha
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7 * Copyright (c) 2012 Frantisek Princ
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8 * All rights reserved.
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10 * Redistribution and use in source and binary forms, with or without
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11 * modification, are permitted provided that the following conditions
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14 * - Redistributions of source code must retain the above copyright
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15 * notice, this list of conditions and the following disclaimer.
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16 * - Redistributions in binary form must reproduce the above copyright
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17 * notice, this list of conditions and the following disclaimer in the
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18 * documentation and/or other materials provided with the distribution.
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19 * - The name of the author may not be used to endorse or promote products
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20 * derived from this software without specific prior written permission.
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22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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34 /** @addtogroup lwext4
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38 * @file ext4_inode.c
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39 * @brief Inode handle functions
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42 #include <ext4_config.h>
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43 #include <ext4_types.h>
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44 #include <ext4_inode.h>
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45 #include <ext4_super.h>
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47 /**@brief Compute number of bits for block count.
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48 * @param block_size Filesystem block_size
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49 * @return Number of bits
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51 static uint32_t ext4_inode_block_bits_count(uint32_t block_size)
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54 uint32_t size = block_size;
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59 } while (size > 256);
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64 uint32_t ext4_inode_get_mode(struct ext4_sblock *sb, struct ext4_inode *inode)
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66 uint32_t v = to_le16(inode->mode);
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68 if (ext4_get32(sb, creator_os) == EXT4_SUPERBLOCK_OS_HURD) {
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69 v |= ((uint32_t)to_le16(inode->osd2.hurd2.mode_high)) << 16;
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75 void ext4_inode_set_mode(struct ext4_sblock *sb, struct ext4_inode *inode,
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78 inode->mode = to_le16((mode << 16) >> 16);
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80 if (ext4_get32(sb, creator_os) == EXT4_SUPERBLOCK_OS_HURD)
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81 inode->osd2.hurd2.mode_high = to_le16(mode >> 16);
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84 uint32_t ext4_inode_get_uid(struct ext4_inode *inode)
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86 return to_le32(inode->uid);
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89 void ext4_inode_set_uid(struct ext4_inode *inode, uint32_t uid)
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91 inode->uid = to_le32(uid);
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94 uint64_t ext4_inode_get_size(struct ext4_sblock *sb, struct ext4_inode *inode)
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96 uint64_t v = to_le32(inode->size_lo);
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98 if ((ext4_get32(sb, rev_level) > 0) &&
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99 (ext4_inode_is_type(sb, inode, EXT4_INODE_MODE_FILE)))
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100 v |= ((uint64_t)to_le32(inode->size_hi)) << 32;
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105 void ext4_inode_set_size(struct ext4_inode *inode, uint64_t size)
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107 inode->size_lo = to_le32((size << 32) >> 32);
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108 inode->size_hi = to_le32(size >> 32);
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111 uint32_t ext4_inode_get_access_time(struct ext4_inode *inode)
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113 return to_le32(inode->access_time);
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115 void ext4_inode_set_access_time(struct ext4_inode *inode, uint32_t time)
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117 inode->access_time = to_le32(time);
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120 uint32_t ext4_inode_get_change_inode_time(struct ext4_inode *inode)
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122 return to_le32(inode->change_inode_time);
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124 void ext4_inode_set_change_inode_time(struct ext4_inode *inode, uint32_t time)
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126 inode->change_inode_time = to_le32(time);
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129 uint32_t ext4_inode_get_modification_time(struct ext4_inode *inode)
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131 return to_le32(inode->modification_time);
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134 void ext4_inode_set_modification_time(struct ext4_inode *inode, uint32_t time)
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136 inode->modification_time = to_le32(time);
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139 uint32_t ext4_inode_get_deletion_time(struct ext4_inode *inode)
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141 return to_le32(inode->deletion_time);
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144 void ext4_inode_set_deletion_time(struct ext4_inode *inode, uint32_t time)
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146 inode->deletion_time = to_le32(time);
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149 uint32_t ext4_inode_get_gid(struct ext4_inode *inode)
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151 return to_le32(inode->gid);
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153 void ext4_inode_set_gid(struct ext4_inode *inode, uint32_t gid)
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155 inode->gid = to_le32(gid);
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158 uint16_t ext4_inode_get_links_count(struct ext4_inode *inode)
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160 return to_le16(inode->links_count);
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162 void ext4_inode_set_links_count(struct ext4_inode *inode, uint16_t cnt)
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164 inode->links_count = to_le16(cnt);
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167 uint64_t ext4_inode_get_blocks_count(struct ext4_sblock *sb,
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168 struct ext4_inode *inode)
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170 uint64_t count = to_le32(inode->blocks_count_lo);
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172 if (ext4_sb_has_feature_read_only(sb, EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) {
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175 count |= ((uint64_t)to_le16(inode->osd2.linux2.blocks_high)) << 32;
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177 if (ext4_inode_has_flag(inode, EXT4_INODE_FLAG_HUGE_FILE)) {
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179 uint32_t block_bits =
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180 ext4_inode_block_bits_count(ext4_sb_get_block_size(sb));
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181 return count << (block_bits - 9);
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188 int ext4_inode_set_blocks_count(struct ext4_sblock *sb,
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189 struct ext4_inode *inode, uint64_t count)
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191 /* 32-bit maximum */
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195 if (count <= max) {
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196 inode->blocks_count_lo = to_le32(count);
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197 inode->osd2.linux2.blocks_high = 0;
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198 ext4_inode_clear_flag(inode, EXT4_INODE_FLAG_HUGE_FILE);
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203 /* Check if there can be used huge files (many blocks) */
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204 if (!ext4_sb_has_feature_read_only(sb, EXT4_FEATURE_RO_COMPAT_HUGE_FILE))
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207 /* 48-bit maximum */
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211 if (count <= max) {
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212 inode->blocks_count_lo = to_le32(count);
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213 inode->osd2.linux2.blocks_high = to_le16(count >> 32);
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214 ext4_inode_clear_flag(inode, EXT4_INODE_FLAG_HUGE_FILE);
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216 uint32_t block_bits =
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217 ext4_inode_block_bits_count(ext4_sb_get_block_size(sb));
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219 ext4_inode_set_flag(inode, EXT4_INODE_FLAG_HUGE_FILE);
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220 count = count >> (block_bits - 9);
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221 inode->blocks_count_lo = to_le32(count);
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222 inode->osd2.linux2.blocks_high = to_le16(count >> 32);
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228 uint32_t ext4_inode_get_flags(struct ext4_inode *inode)
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230 return to_le32(inode->flags);
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232 void ext4_inode_set_flags(struct ext4_inode *inode, uint32_t flags)
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234 inode->flags = to_le32(flags);
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237 uint32_t ext4_inode_get_generation(struct ext4_inode *inode)
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239 return to_le32(inode->generation);
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241 void ext4_inode_set_generation(struct ext4_inode *inode, uint32_t gen)
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243 inode->generation = to_le32(gen);
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246 uint64_t ext4_inode_get_file_acl(struct ext4_inode *inode,
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247 struct ext4_sblock *sb)
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249 /*TODO: Verify it*/
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250 uint64_t v = to_le32(inode->file_acl_lo);
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252 if (ext4_get32(sb, creator_os) == EXT4_SUPERBLOCK_OS_LINUX)
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253 v |= ((uint32_t)to_le16(inode->osd2.linux2.file_acl_high)) << 16;
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258 void ext4_inode_set_file_acl(struct ext4_inode *inode, struct ext4_sblock *sb,
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261 /*TODO: Verify it*/
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262 inode->file_acl_lo = to_le32((acl << 32) >> 32);
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264 if (ext4_get32(sb, creator_os) == EXT4_SUPERBLOCK_OS_LINUX)
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265 inode->osd2.linux2.file_acl_high = to_le16(acl >> 32);
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268 uint32_t ext4_inode_get_direct_block(struct ext4_inode *inode, uint32_t idx)
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270 return to_le32(inode->blocks[idx]);
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272 void ext4_inode_set_direct_block(struct ext4_inode *inode, uint32_t idx,
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275 inode->blocks[idx] = to_le32(block);
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278 uint32_t ext4_inode_get_indirect_block(struct ext4_inode *inode, uint32_t idx)
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280 return to_le32(inode->blocks[idx + EXT4_INODE_INDIRECT_BLOCK]);
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283 void ext4_inode_set_indirect_block(struct ext4_inode *inode, uint32_t idx,
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286 inode->blocks[idx + EXT4_INODE_INDIRECT_BLOCK] = to_le32(block);
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289 bool ext4_inode_is_type(struct ext4_sblock *sb, struct ext4_inode *inode,
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292 return (ext4_inode_get_mode(sb, inode) & EXT4_INODE_MODE_TYPE_MASK) == type;
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295 bool ext4_inode_has_flag(struct ext4_inode *inode, uint32_t f)
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297 return ext4_inode_get_flags(inode) & f;
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300 void ext4_inode_clear_flag(struct ext4_inode *inode, uint32_t f)
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302 uint32_t flags = ext4_inode_get_flags(inode);
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303 flags = flags & (~f);
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304 ext4_inode_set_flags(inode, flags);
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307 void ext4_inode_set_flag(struct ext4_inode *inode, uint32_t f)
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309 uint32_t flags = ext4_inode_get_flags(inode);
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311 ext4_inode_set_flags(inode, flags);
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314 bool ext4_inode_can_truncate(struct ext4_sblock *sb, struct ext4_inode *inode)
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316 if ((ext4_inode_has_flag(inode, EXT4_INODE_FLAG_APPEND)) ||
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317 (ext4_inode_has_flag(inode, EXT4_INODE_FLAG_IMMUTABLE)))
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320 if ((ext4_inode_is_type(sb, inode, EXT4_INODE_MODE_FILE)) ||
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321 (ext4_inode_is_type(sb, inode, EXT4_INODE_MODE_DIRECTORY)))
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327 struct ext4_extent_header *
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328 ext4_inode_get_extent_header(struct ext4_inode *inode)
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330 return (struct ext4_extent_header *)inode->blocks;
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