errcode_t ext2fs_get_next_inode_full(ext2_inode_scan scan, ext2_ino_t *ino,
struct ext2_inode *inode, int bufsize)
{
errcode_t retval;
int extra_bytes = 0;
int length;
struct ext2_inode_large *iptr = (struct ext2_inode_large *)inode;
char *iblock_status;
unsigned int iblk;
EXT2_CHECK_MAGIC(scan, EXT2_ET_MAGIC_INODE_SCAN);
length = EXT2_INODE_SIZE(scan->fs->super);
iblock_status = SCAN_BLOCK_STATUS(scan);
/*
* Do we need to start reading a new block group?
*/
if (scan->inodes_left <= 0) {
force_new_group:
if (scan->done_group) {
retval = (scan->done_group)
(scan->fs, scan, scan->current_group,
scan->done_group_data);
if (retval)
return retval;
}
if (scan->groups_left <= 0) {
*ino = 0;
return 0;
}
retval = get_next_blockgroup(scan);
if (retval)
return retval;
}
/*
* These checks are done outside the above if statement so
* they can be done for block group #0.
*/
if ((scan->scan_flags & EXT2_SF_DO_LAZY) &&
(ext2fs_bg_flags_test(scan->fs, scan->current_group, EXT2_BG_INODE_UNINIT)
))
goto force_new_group;
if (scan->inodes_left == 0)
goto force_new_group;
if (scan->current_block == 0) {
if (scan->scan_flags & EXT2_SF_SKIP_MISSING_ITABLE) {
goto force_new_group;
} else
return EXT2_ET_MISSING_INODE_TABLE;
}
/*
* Have we run out of space in the inode buffer? If so, we
* need to read in more blocks.
*/
if (scan->bytes_left < scan->inode_size) {
memcpy(scan->temp_buffer, scan->ptr, scan->bytes_left);
extra_bytes = scan->bytes_left;
retval = get_next_blocks(scan);
if (retval)
return retval;
#if 0
/*
* XXX test Need check for used inode somehow.
* (Note: this is hard.)
*/
if (is_empty_scan(scan))
goto force_new_group;
#endif
}
if (bufsize < length) {
retval = ext2fs_get_mem(length, &iptr);
if (retval)
return retval;
}
retval = 0;
iblk = scan->current_inode % EXT2_INODES_PER_GROUP(scan->fs->super) /
EXT2_INODES_PER_BLOCK(scan->fs->super) %
scan->inode_buffer_blocks;
if (extra_bytes) {
memcpy(scan->temp_buffer+extra_bytes, scan->ptr,
scan->inode_size - extra_bytes);
scan->ptr += scan->inode_size - extra_bytes;
scan->bytes_left -= scan->inode_size - extra_bytes;
/* Verify the inode checksum. */
if (!(iblock_status[iblk] & IBLOCK_STATUS_CSUMS_OK) &&
!(scan->fs->flags & EXT2_FLAG_IGNORE_CSUM_ERRORS) &&
!ext2fs_inode_csum_verify(scan->fs, scan->current_inode + 1,
(struct ext2_inode_large *)scan->temp_buffer))
retval = EXT2_ET_INODE_CSUM_INVALID;
#ifdef WORDS_BIGENDIAN
memset(iptr, 0, length);
ext2fs_swap_inode_full(scan->fs,
(struct ext2_inode_large *) iptr,
(struct ext2_inode_large *) scan->temp_buffer,
0, length);
#else
memcpy(iptr, scan->temp_buffer, length);
#endif
if (scan->scan_flags & EXT2_SF_BAD_EXTRA_BYTES)
retval = EXT2_ET_BAD_BLOCK_IN_INODE_TABLE;
scan->scan_flags &= ~EXT2_SF_BAD_EXTRA_BYTES;
} else {
/* Verify the inode checksum. */
if (!(iblock_status[iblk] & IBLOCK_STATUS_CSUMS_OK) &&
!(scan->fs->flags & EXT2_FLAG_IGNORE_CSUM_ERRORS) &&
!ext2fs_inode_csum_verify(scan->fs, scan->current_inode + 1,
(struct ext2_inode_large *)scan->ptr))
retval = EXT2_ET_INODE_CSUM_INVALID;
#ifdef WORDS_BIGENDIAN
memset(iptr, 0, length);
ext2fs_swap_inode_full(scan->fs,
(struct ext2_inode_large *) iptr,
(struct ext2_inode_large *) scan->ptr,
0, length);
#else
memcpy(iptr, scan->ptr, length);
#endif
scan->ptr += scan->inode_size;
scan->bytes_left -= scan->inode_size;
if (scan->scan_flags & EXT2_SF_BAD_INODE_BLK)
retval = EXT2_ET_BAD_BLOCK_IN_INODE_TABLE;
}
if ((iblock_status[iblk] & IBLOCK_STATUS_INSANE) &&
(retval == 0 || retval == EXT2_ET_INODE_CSUM_INVALID))
retval = EXT2_ET_INODE_IS_GARBAGE;
scan->inodes_left--;
scan->current_inode++;
*ino = scan->current_inode;
if (iptr != (struct ext2_inode_large *)inode) {
memcpy(inode, iptr, bufsize);
ext2fs_free_mem(&iptr);
}
return retval;
}
errcode_t ext2fs_get_next_inode_full(ext2_inode_scan scan, ext2_ino_t *ino,
struct ext2_inode *inode, int bufsize)
{
errcode_t retval;
int extra_bytes = 0;
EXT2_CHECK_MAGIC(scan, EXT2_ET_MAGIC_INODE_SCAN);
/*
* Do we need to start reading a new block group?
*/
if (scan->inodes_left <= 0) {
force_new_group:
if (scan->done_group) {
retval = (scan->done_group)
(scan->fs, scan, scan->current_group,
scan->done_group_data);
if (retval)
return retval;
}
if (scan->groups_left <= 0) {
*ino = 0;
return 0;
}
retval = get_next_blockgroup(scan);
if (retval)
return retval;
}
/*
* These checks are done outside the above if statement so
* they can be done for block group #0.
*/
if ((scan->scan_flags & EXT2_SF_DO_LAZY) &&
(ext2fs_bg_flags_test(scan->fs, scan->current_group, EXT2_BG_INODE_UNINIT)
))
goto force_new_group;
if (scan->inodes_left == 0)
goto force_new_group;
if (scan->current_block == 0) {
if (scan->scan_flags & EXT2_SF_SKIP_MISSING_ITABLE) {
goto force_new_group;
} else
return EXT2_ET_MISSING_INODE_TABLE;
}
/*
* Have we run out of space in the inode buffer? If so, we
* need to read in more blocks.
*/
if (scan->bytes_left < scan->inode_size) {
memcpy(scan->temp_buffer, scan->ptr, scan->bytes_left);
extra_bytes = scan->bytes_left;
retval = get_next_blocks(scan);
if (retval)
return retval;
#if 0
/*
* XXX test Need check for used inode somehow.
* (Note: this is hard.)
*/
if (is_empty_scan(scan))
goto force_new_group;
#endif
}
retval = 0;
if (extra_bytes) {
memcpy(scan->temp_buffer+extra_bytes, scan->ptr,
scan->inode_size - extra_bytes);
scan->ptr += scan->inode_size - extra_bytes;
scan->bytes_left -= scan->inode_size - extra_bytes;
#ifdef WORDS_BIGENDIAN
memset(inode, 0, bufsize);
ext2fs_swap_inode_full(scan->fs,
(struct ext2_inode_large *) inode,
(struct ext2_inode_large *) scan->temp_buffer,
0, bufsize);
#else
*inode = *((struct ext2_inode *) scan->temp_buffer);
#endif
if (scan->scan_flags & EXT2_SF_BAD_EXTRA_BYTES)
retval = EXT2_ET_BAD_BLOCK_IN_INODE_TABLE;
scan->scan_flags &= ~EXT2_SF_BAD_EXTRA_BYTES;
} else {
#ifdef WORDS_BIGENDIAN
memset(inode, 0, bufsize);
ext2fs_swap_inode_full(scan->fs,
(struct ext2_inode_large *) inode,
(struct ext2_inode_large *) scan->ptr,
0, bufsize);
#else
memcpy(inode, scan->ptr, bufsize);
#endif
scan->ptr += scan->inode_size;
scan->bytes_left -= scan->inode_size;
if (scan->scan_flags & EXT2_SF_BAD_INODE_BLK)
retval = EXT2_ET_BAD_BLOCK_IN_INODE_TABLE;
}
scan->inodes_left--;
scan->current_inode++;
*ino = scan->current_inode;
return retval;
}
