2 * Copyright (c) 2013 Grzegorz Kostka (kostka.grzegorz@gmail.com)
6 * Copyright (c) 2012 Martin Sucha
7 * Copyright (c) 2012 Frantisek Princ
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
14 * - Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * - Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * - The name of the author may not be used to endorse or promote products
20 * derived from this software without specific prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 /** @addtogroup lwext4
39 * @brief Inode handle functions
42 #include "ext4_config.h"
43 #include "ext4_types.h"
44 #include "ext4_misc.h"
45 #include "ext4_errno.h"
46 #include "ext4_debug.h"
48 #include "ext4_inode.h"
49 #include "ext4_super.h"
51 /**@brief Compute number of bits for block count.
52 * @param block_size Filesystem block_size
53 * @return Number of bits
55 static uint32_t ext4_inode_block_bits_count(uint32_t block_size)
58 uint32_t size = block_size;
68 uint32_t ext4_inode_get_mode(struct ext4_sblock *sb, struct ext4_inode *inode)
70 uint32_t v = to_le16(inode->mode);
72 if (ext4_get32(sb, creator_os) == EXT4_SUPERBLOCK_OS_HURD) {
73 v |= ((uint32_t)to_le16(inode->osd2.hurd2.mode_high)) << 16;
79 void ext4_inode_set_mode(struct ext4_sblock *sb, struct ext4_inode *inode,
82 inode->mode = to_le16((mode << 16) >> 16);
84 if (ext4_get32(sb, creator_os) == EXT4_SUPERBLOCK_OS_HURD)
85 inode->osd2.hurd2.mode_high = to_le16(mode >> 16);
88 uint32_t ext4_inode_get_uid(struct ext4_inode *inode)
90 return to_le32(inode->uid);
93 void ext4_inode_set_uid(struct ext4_inode *inode, uint32_t uid)
95 inode->uid = to_le32(uid);
98 uint64_t ext4_inode_get_size(struct ext4_sblock *sb, struct ext4_inode *inode)
100 uint64_t v = to_le32(inode->size_lo);
102 if ((ext4_get32(sb, rev_level) > 0) &&
103 (ext4_inode_is_type(sb, inode, EXT4_INODE_MODE_FILE)))
104 v |= ((uint64_t)to_le32(inode->size_hi)) << 32;
109 void ext4_inode_set_size(struct ext4_inode *inode, uint64_t size)
111 inode->size_lo = to_le32((size << 32) >> 32);
112 inode->size_hi = to_le32(size >> 32);
115 uint32_t ext4_inode_get_csum(struct ext4_sblock *sb, struct ext4_inode *inode)
117 uint16_t inode_size = ext4_get16(sb, inode_size);
118 uint32_t v = to_le16(inode->osd2.linux2.checksum_lo);
120 if (inode_size > EXT4_GOOD_OLD_INODE_SIZE)
121 v |= ((uint32_t)to_le16(inode->checksum_hi)) << 16;
126 void ext4_inode_set_csum(struct ext4_sblock *sb, struct ext4_inode *inode,
129 uint16_t inode_size = ext4_get16(sb, inode_size);
130 inode->osd2.linux2.checksum_lo =
131 to_le16((checksum << 16) >> 16);
133 if (inode_size > EXT4_GOOD_OLD_INODE_SIZE)
134 inode->checksum_hi = to_le16(checksum >> 16);
138 uint32_t ext4_inode_get_access_time(struct ext4_inode *inode)
140 return to_le32(inode->access_time);
142 void ext4_inode_set_access_time(struct ext4_inode *inode, uint32_t time)
144 inode->access_time = to_le32(time);
147 uint32_t ext4_inode_get_change_inode_time(struct ext4_inode *inode)
149 return to_le32(inode->change_inode_time);
151 void ext4_inode_set_change_inode_time(struct ext4_inode *inode, uint32_t time)
153 inode->change_inode_time = to_le32(time);
156 uint32_t ext4_inode_get_modif_time(struct ext4_inode *inode)
158 return to_le32(inode->modification_time);
161 void ext4_inode_set_modif_time(struct ext4_inode *inode, uint32_t time)
163 inode->modification_time = to_le32(time);
166 uint32_t ext4_inode_get_del_time(struct ext4_inode *inode)
168 return to_le32(inode->deletion_time);
171 void ext4_inode_set_del_time(struct ext4_inode *inode, uint32_t time)
173 inode->deletion_time = to_le32(time);
176 uint32_t ext4_inode_get_gid(struct ext4_inode *inode)
178 return to_le32(inode->gid);
180 void ext4_inode_set_gid(struct ext4_inode *inode, uint32_t gid)
182 inode->gid = to_le32(gid);
185 uint16_t ext4_inode_get_links_cnt(struct ext4_inode *inode)
187 return to_le16(inode->links_count);
189 void ext4_inode_set_links_cnt(struct ext4_inode *inode, uint16_t cnt)
191 inode->links_count = to_le16(cnt);
194 uint64_t ext4_inode_get_blocks_count(struct ext4_sblock *sb,
195 struct ext4_inode *inode)
197 uint64_t cnt = to_le32(inode->blocks_count_lo);
199 if (ext4_sb_feature_ro_com(sb, EXT4_FRO_COM_HUGE_FILE)) {
202 cnt |= (uint64_t)to_le16(inode->osd2.linux2.blocks_high) << 32;
204 if (ext4_inode_has_flag(inode, EXT4_INODE_FLAG_HUGE_FILE)) {
206 uint32_t block_count = ext4_sb_get_block_size(sb);
207 uint32_t b = ext4_inode_block_bits_count(block_count);
208 return cnt << (b - 9);
215 int ext4_inode_set_blocks_count(struct ext4_sblock *sb,
216 struct ext4_inode *inode, uint64_t count)
223 inode->blocks_count_lo = to_le32((uint32_t)count);
224 inode->osd2.linux2.blocks_high = 0;
225 ext4_inode_clear_flag(inode, EXT4_INODE_FLAG_HUGE_FILE);
230 /* Check if there can be used huge files (many blocks) */
231 if (!ext4_sb_feature_ro_com(sb, EXT4_FRO_COM_HUGE_FILE))
239 inode->blocks_count_lo = to_le32((uint32_t)count);
240 inode->osd2.linux2.blocks_high = to_le16((uint16_t)(count >> 32));
241 ext4_inode_clear_flag(inode, EXT4_INODE_FLAG_HUGE_FILE);
243 uint32_t block_count = ext4_sb_get_block_size(sb);
244 uint32_t block_bits =ext4_inode_block_bits_count(block_count);
246 ext4_inode_set_flag(inode, EXT4_INODE_FLAG_HUGE_FILE);
247 count = count >> (block_bits - 9);
248 inode->blocks_count_lo = to_le32((uint32_t)count);
249 inode->osd2.linux2.blocks_high = to_le16((uint16_t)(count >> 32));
255 uint32_t ext4_inode_get_flags(struct ext4_inode *inode)
257 return to_le32(inode->flags);
259 void ext4_inode_set_flags(struct ext4_inode *inode, uint32_t flags)
261 inode->flags = to_le32(flags);
264 uint32_t ext4_inode_get_generation(struct ext4_inode *inode)
266 return to_le32(inode->generation);
268 void ext4_inode_set_generation(struct ext4_inode *inode, uint32_t gen)
270 inode->generation = to_le32(gen);
273 uint16_t ext4_inode_get_extra_isize(struct ext4_sblock *sb,
274 struct ext4_inode *inode)
276 uint16_t inode_size = ext4_get16(sb, inode_size);
277 if (inode_size > EXT4_GOOD_OLD_INODE_SIZE)
278 return to_le16(inode->extra_isize);
283 void ext4_inode_set_extra_isize(struct ext4_sblock *sb,
284 struct ext4_inode *inode,
287 uint16_t inode_size = ext4_get16(sb, inode_size);
288 if (inode_size > EXT4_GOOD_OLD_INODE_SIZE)
289 inode->extra_isize = to_le16(size);
292 uint64_t ext4_inode_get_file_acl(struct ext4_inode *inode,
293 struct ext4_sblock *sb)
295 uint64_t v = to_le32(inode->file_acl_lo);
297 if (ext4_get32(sb, creator_os) == EXT4_SUPERBLOCK_OS_LINUX)
298 v |= (uint32_t)to_le16(inode->osd2.linux2.file_acl_high) << 16;
303 void ext4_inode_set_file_acl(struct ext4_inode *inode, struct ext4_sblock *sb,
306 inode->file_acl_lo = to_le32((acl << 32) >> 32);
308 if (ext4_get32(sb, creator_os) == EXT4_SUPERBLOCK_OS_LINUX)
309 inode->osd2.linux2.file_acl_high = to_le16((uint16_t)(acl >> 32));
312 uint32_t ext4_inode_get_direct_block(struct ext4_inode *inode, uint32_t idx)
314 return to_le32(inode->blocks[idx]);
316 void ext4_inode_set_direct_block(struct ext4_inode *inode, uint32_t idx,
319 inode->blocks[idx] = to_le32(block);
322 uint32_t ext4_inode_get_indirect_block(struct ext4_inode *inode, uint32_t idx)
324 return to_le32(inode->blocks[idx + EXT4_INODE_INDIRECT_BLOCK]);
327 void ext4_inode_set_indirect_block(struct ext4_inode *inode, uint32_t idx,
330 inode->blocks[idx + EXT4_INODE_INDIRECT_BLOCK] = to_le32(block);
333 uint32_t ext4_inode_get_dev(struct ext4_inode *inode)
335 uint32_t dev_0, dev_1;
336 dev_0 = ext4_inode_get_direct_block(inode, 0);
337 dev_1 = ext4_inode_get_direct_block(inode, 1);
345 void ext4_inode_set_dev(struct ext4_inode *inode, uint32_t dev)
348 ext4_inode_set_direct_block(inode, 1, dev);
350 ext4_inode_set_direct_block(inode, 0, dev);
353 uint32_t ext4_inode_type(struct ext4_sblock *sb, struct ext4_inode *inode)
355 return (ext4_inode_get_mode(sb, inode) & EXT4_INODE_MODE_TYPE_MASK);
358 bool ext4_inode_is_type(struct ext4_sblock *sb, struct ext4_inode *inode,
361 return ext4_inode_type(sb, inode) == type;
364 bool ext4_inode_has_flag(struct ext4_inode *inode, uint32_t f)
366 return ext4_inode_get_flags(inode) & f;
369 void ext4_inode_clear_flag(struct ext4_inode *inode, uint32_t f)
371 uint32_t flags = ext4_inode_get_flags(inode);
372 flags = flags & (~f);
373 ext4_inode_set_flags(inode, flags);
376 void ext4_inode_set_flag(struct ext4_inode *inode, uint32_t f)
378 uint32_t flags = ext4_inode_get_flags(inode);
380 ext4_inode_set_flags(inode, flags);
383 bool ext4_inode_can_truncate(struct ext4_sblock *sb, struct ext4_inode *inode)
385 if ((ext4_inode_has_flag(inode, EXT4_INODE_FLAG_APPEND)) ||
386 (ext4_inode_has_flag(inode, EXT4_INODE_FLAG_IMMUTABLE)))
389 if ((ext4_inode_is_type(sb, inode, EXT4_INODE_MODE_FILE)) ||
390 (ext4_inode_is_type(sb, inode, EXT4_INODE_MODE_DIRECTORY)) ||
391 (ext4_inode_is_type(sb, inode, EXT4_INODE_MODE_SOFTLINK)))
397 struct ext4_extent_header *
398 ext4_inode_get_extent_header(struct ext4_inode *inode)
400 return (struct ext4_extent_header *)inode->blocks;