SMFS Reference
SMFS is a Secure Memory File System (as exported to FMs).
It allows FMs to store keys into tamper-protected battery-backed Static RAM (SRAM)
It has the following general specifications:
>Arbitrary depth directory structure supported.
>File names are any character other than '\' or '/'.
>Path separator is '/' (the Windows '\' is not allowed)
>Files are of fixed size and initialized with zeros when created.
>Directories will expand in size as needed to fit more files.
This chapter contains the following sections:
>File Attributes Structure (SmFsAttr)
Important Constants
>Max file name length is 16
>Max path length is 100
>Max number of open files is 32
>Max number of file search handles is 16
Error Codes
|
SMFS_ERR_ERROR |
1 | A general error has occurred |
|
SMFS_ERR_NOT_INITED |
2 |
The SMFS has not been initialized |
|
SMFS_ERR_MEMORY |
3 |
The SMFS has run out of memory |
|
SMFS_ERR_NAME_TOO_LONG |
4 |
The name given for a file is too long |
|
SMFS_ERR_RESOURCES |
5 |
The SMFS has run out of resources |
|
SMFS_ERR_PARAMETER |
6 |
An invalid parameter was passed to SMFS |
|
SMFS_ERR_ACCESS |
7 |
User does not have request access to file |
|
SMFS_ERR_NOT_FOUND |
8 |
Requested file was not found |
|
SMFS_ERR_BUSY |
9 |
Operation is being attempted on an open file |
|
SMFS_ERR_EXIST |
10 |
A file being created already exists |
|
SMFS_ERR_FILE_TYPE |
11 |
Operation being performed on wrong file type |
File Attributes Structure (SmFsAttr)
Synopsis
SmFsAttr {
unsigned int Size;
unsigned int isDir;
};
Description
This structure holds the file or directory attributes
Members
Size: Current file size in bytes or directory size in entries
isDir: Flag specifying if file is a directory
