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Prevent index root to be moved out from base mft record

edge.strict_endians
yura 2006-08-02 03:57:40 +00:00
parent 08689c171e
commit 70aef8d69c
1 changed files with 33 additions and 6 deletions
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39
libntfs/attrib.c
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@ -3731,9 +3731,13 @@ cluster_free_err_out:
*
* On success return 0 and on error return -1 with errno set to the error code.
* The following error codes are defined:
* ENOMEM - Not enough memory to complete operation.
* ERANGE - @newsize is not valid for the attribute type of @na.
* ENOSPC - There is no enough space in base mft to resize $ATTRIBUTE_LIST.
* ENOMEM - Not enough memory to complete operation.
* ERANGE - @newsize is not valid for the attribute type of @na.
* ENOSPC - There is no enough space on the volume to allocate
* new clusters or in base mft to resize $ATTRIBUTE_LIST.
* EOVERFLOW - Resident attribute can not become non resident and
* already filled whole MFT record, but had not reached
* @newsize bytes length.
*/
static int ntfs_resident_attr_resize(ntfs_attr *na, const s64 newsize)
{
@ -3883,6 +3887,22 @@ static int ntfs_resident_attr_resize(ntfs_attr *na, const s64 newsize)
goto put_err_out;
}
/*
* Force index allocation creation instead of moving out index root
* from the base MFT record.
*/
if (na->type == AT_INDEX_ROOT && na->data_size > sizeof(INDEX_ROOT) +
sizeof(INDEX_ENTRY_HEADER) + sizeof(VCN)) {
INDEX_ROOT *ir;
ir = (INDEX_ROOT*)((u8*)ctx->attr +
le16_to_cpu(ctx->attr->value_offset));
if (!(ir->index.flags & LARGE_INDEX)) {
err = EOVERFLOW;
goto put_err_out;
}
}
/*
* Check whether attribute is already single in the this MFT record.
* 8 added for the attribute terminator.
@ -3890,7 +3910,7 @@ static int ntfs_resident_attr_resize(ntfs_attr *na, const s64 newsize)
if (le32_to_cpu(ctx->mrec->bytes_in_use) ==
le16_to_cpu(ctx->mrec->attrs_offset) +
le32_to_cpu(ctx->attr->length) + 8) {
err = ENOSPC;
err = EOVERFLOW;
goto put_err_out;
}
@ -4960,8 +4980,15 @@ put_err_out:
*
* On success return 0 and on error return -1 with errno set to the error code.
* The following error codes are defined:
* EINVAL - Invalid arguments were passed to the function.
* EOPNOTSUPP - The desired resize is not implemented yet.
* EINVAL - Invalid arguments were passed to the function.
* EACCES - Attribute is encrypted.
* ERANGE - @newsize is not valid for the attribute type of @na.
* ENOSPC - There is no enough space on the volume to allocate
* new clusters or in base mft to resize $ATTRIBUTE_LIST.
* EOVERFLOW - Resident attribute can not become non resident and
* already filled whole MFT record, but had not reached
* @newsize bytes length.
* EOPNOTSUPP - The desired resize is not implemented yet.
*/
int ntfs_attr_truncate(ntfs_attr *na, const s64 newsize)
{