// read real fs inode 128++
int intern_read_inode_full(ext2_ino_t ino, struct ext2_inode * inode, int bufsize)
{
int retval;
retval = ext2fs_read_inode_full(current_fs, ino, inode, bufsize);
if (retval) {
fprintf(stderr,"Error %d while reading inode %u\n",retval, ino);
return 1;
}
return 0;
}
int debugfs_read_inode_full(ext2_ino_t ino, struct ext2_inode * inode,
const char *cmd, int bufsize)
{
int retval;
retval = ext2fs_read_inode_full(current_fs, ino, inode, bufsize);
if (retval) {
com_err(cmd, retval, "while reading inode %u", ino);
return 1;
}
return 0;
}
void e2fsck_read_inode_full(e2fsck_t ctx, unsigned long ino,
struct ext2_inode *inode, int bufsize,
const char *proc)
{
errcode_t retval;
retval = ext2fs_read_inode_full(ctx->fs, ino, inode, bufsize);
if (retval) {
com_err("ext2fs_read_inode_full", retval,
_("while reading inode %lu in %s"), ino, proc);
fatal_error(ctx, 0);
}
}
errcode_t ext2fs_write_inode_full(ext2_filsys fs, ext2_ino_t ino,
struct ext2_inode * inode, int bufsize)
{
blk64_t block_nr;
unsigned long group, block, offset;
errcode_t retval = 0;
struct ext2_inode_large *w_inode;
char *ptr;
unsigned i;
int clen;
int length = EXT2_INODE_SIZE(fs->super);
EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
/* Check to see if user provided an override function */
if (fs->write_inode) {
retval = (fs->write_inode)(fs, ino, inode);
if (retval != EXT2_ET_CALLBACK_NOTHANDLED)
return retval;
}
if ((ino == 0) || (ino > fs->super->s_inodes_count))
return EXT2_ET_BAD_INODE_NUM;
/* Prepare our shadow buffer for read/modify/byteswap/write */
retval = ext2fs_get_mem(length, &w_inode);
if (retval)
return retval;
if (bufsize < length) {
int old_flags = fs->flags;
fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
retval = ext2fs_read_inode_full(fs, ino,
(struct ext2_inode *)w_inode,
length);
fs->flags = (old_flags & EXT2_FLAG_IGNORE_CSUM_ERRORS) |
(fs->flags & ~EXT2_FLAG_IGNORE_CSUM_ERRORS);
if (retval)
goto errout;
}
/* Check to see if the inode cache needs to be updated */
if (fs->icache) {
for (i=0; i < fs->icache->cache_size; i++) {
if (fs->icache->cache[i].ino == ino) {
memcpy(fs->icache->cache[i].inode, inode,
(bufsize > length) ? length : bufsize);
break;
}
}
} else {
retval = ext2fs_create_inode_cache(fs, 4);
if (retval)
goto errout;
}
memcpy(w_inode, inode, (bufsize > length) ? length : bufsize);
if (!(fs->flags & EXT2_FLAG_RW)) {
retval = EXT2_ET_RO_FILSYS;
goto errout;
}
#ifdef WORDS_BIGENDIAN
ext2fs_swap_inode_full(fs, w_inode, w_inode, 1, length);
#endif
retval = ext2fs_inode_csum_set(fs, ino, w_inode);
if (retval)
goto errout;
group = (ino - 1) / EXT2_INODES_PER_GROUP(fs->super);
offset = ((ino - 1) % EXT2_INODES_PER_GROUP(fs->super)) *
EXT2_INODE_SIZE(fs->super);
block = offset >> EXT2_BLOCK_SIZE_BITS(fs->super);
if (!ext2fs_inode_table_loc(fs, (unsigned) group)) {
retval = EXT2_ET_MISSING_INODE_TABLE;
goto errout;
}
block_nr = ext2fs_inode_table_loc(fs, (unsigned) group) + block;
offset &= (EXT2_BLOCK_SIZE(fs->super) - 1);
ptr = (char *) w_inode;
while (length) {
clen = length;
if ((offset + length) > fs->blocksize)
clen = fs->blocksize - offset;
if (fs->icache->buffer_blk != block_nr) {
retval = io_channel_read_blk64(fs->io, block_nr, 1,
fs->icache->buffer);
if (retval)
goto errout;
fs->icache->buffer_blk = block_nr;
}
memcpy((char *) fs->icache->buffer + (unsigned) offset,
ptr, clen);
retval = io_channel_write_blk64(fs->io, block_nr, 1,
fs->icache->buffer);
if (retval)
goto errout;
offset = 0;
ptr += clen;
length -= clen;
block_nr++;
}
fs->flags |= EXT2_FLAG_CHANGED;
errout:
ext2fs_free_mem(&w_inode);
return retval;
}
errcode_t ext2fs_read_inode(ext2_filsys fs, ext2_ino_t ino,
struct ext2_inode * inode)
{
return ext2fs_read_inode_full(fs, ino, inode,
sizeof(struct ext2_inode));
}
extern errcode_t ext2fs_extent_open(ext2_filsys fs, ext2_ino_t ino,
ext2_extent_handle_t *ret_handle)
{
struct ext2_extent_handle *handle;
errcode_t retval;
int isize = EXT2_INODE_SIZE(fs->super);
int i;
struct ext3_extent_header *eh;
EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
if ((ino == 0) || (ino > fs->super->s_inodes_count))
return EXT2_ET_BAD_INODE_NUM;
retval = ext2fs_get_mem(sizeof(struct ext2_extent_handle), &handle);
if (retval)
return retval;
memset(handle, 0, sizeof(struct ext2_extent_handle));
retval = ext2fs_get_mem(isize, &handle->inode);
if (retval)
goto errout;
handle->ino = ino;
handle->fs = fs;
retval = ext2fs_read_inode_full(fs, ino, handle->inode, isize);
if (retval)
goto errout;
eh = (struct ext3_extent_header *) &handle->inode->i_block[0];
for (i=0; i < EXT2_N_BLOCKS; i++)
if (handle->inode->i_block[i])
break;
if (i >= EXT2_N_BLOCKS) {
eh->eh_magic = ext2fs_cpu_to_le16(EXT3_EXT_MAGIC);
eh->eh_depth = 0;
eh->eh_entries = 0;
i = (sizeof(handle->inode->i_block) - sizeof(*eh)) /
sizeof(struct ext3_extent);
eh->eh_max = ext2fs_cpu_to_le16(i);
handle->inode->i_flags |= EXT4_EXTENTS_FL;
}
if (!(handle->inode->i_flags & EXT4_EXTENTS_FL)) {
retval = EXT2_ET_INODE_NOT_EXTENT;
goto errout;
}
retval = ext2fs_extent_header_verify(eh, sizeof(handle->inode->i_block));
if (retval)
goto errout;
handle->max_depth = ext2fs_le16_to_cpu(eh->eh_depth);
handle->type = ext2fs_le16_to_cpu(eh->eh_magic);
retval = ext2fs_get_mem(((handle->max_depth+1) *
sizeof(struct extent_path)),
&handle->path);
memset(handle->path, 0,
(handle->max_depth+1) * sizeof(struct extent_path));
handle->path[0].buf = (char *) handle->inode->i_block;
handle->path[0].left = handle->path[0].entries =
ext2fs_le16_to_cpu(eh->eh_entries);
handle->path[0].max_entries = ext2fs_le16_to_cpu(eh->eh_max);
handle->path[0].curr = 0;
handle->path[0].end_blk =
((((__u64) handle->inode->i_size_high << 32) +
handle->inode->i_size + (fs->blocksize - 1))
>> EXT2_BLOCK_SIZE_BITS(fs->super));
handle->path[0].visit_num = 1;
handle->level = 0;
handle->magic = EXT2_ET_MAGIC_EXTENT_HANDLE;
*ret_handle = handle;
return 0;
errout:
ext2fs_extent_free(handle);
return retval;
}
int main(int argc, char *argv[]) {
ext2_ino_t inode;
struct ext2_inode *inode_buf;
struct ext2_inode_large *large_inode;
int retval;
char *fs;
if (argc != 2) {
fprintf(stderr, "Usage: crtime <file>\n");
return -1;
}
retval = check_permissions(argv[1]);
if (retval) {
return retval;
}
retval = get_inode(argv[1], &inode);
if (retval) {
return retval;
}
retval = get_fs_name(argv[1], &fs);
if (retval) {
return retval;
}
retval = open_filesystem(fs);
if (retval) {
free(fs);
return retval;
}
inode_buf = (struct ext2_inode *)malloc(EXT2_INODE_SIZE(current_fs->super));
if (!inode_buf) {
free(fs);
fprintf(stderr, "Failed to allocate memory\n");
return -1;
}
retval = ext2fs_read_inode_full(current_fs, inode, inode_buf, EXT2_INODE_SIZE(current_fs->super));
if (retval) {
fprintf(stderr, "Failed to read inode\n");
free(fs);
free(inode_buf);
return retval;
}
if (EXT2_INODE_SIZE(current_fs->super) <= EXT2_GOOD_OLD_INODE_SIZE) {
free(fs);
free(inode_buf);
fprintf(stderr, "Create time unavailable");
return -1;
}
large_inode = (struct ext2_inode_large *)inode_buf;
if (large_inode->i_extra_isize < 24) {
free(fs);
free(inode_buf);
fprintf(stderr, "Create time unavailable");
return -1;
}
printf("%d\n", large_inode->i_crtime);
free(fs);
free(inode_buf);
ext2fs_close(current_fs);
return 0;
}
