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fs_crypto_domain_add()
Create a domain

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      - fs_crypto_check()
        Determine if the underlying filesystem supports encryption
      - fs_crypto_domain_add()
        Create a domain
      - fs_crypto_domain_add_flags()
        Create an encryption domain and unlock it if requested
      - fs_crypto_domain_hard_lock()
        Lock a domain
      - fs_crypto_domain_key_change()
        Change the key needed to unlock the specified domain
      - fs_crypto_domain_key_check()
        Determine if a given domain key is valid
      - fs_crypto_domain_key_size()
        Return the size of keys needed by the filesystem encryption
      - fs_crypto_domain_lock()
        Lock a domain
      - fs_crypto_domain_query()
        Get status information for a domain
      - fs_crypto_domain_remove()
        Destroy a domain
      - fs_crypto_domain_unlock()
        Unlock a domain
      - fs_crypto_domain_whitelist_configure()
        Perform whitelist configuration for a domain whitelist
      - fs_crypto_domain_whitelist_ctrl()
        Perform a control action for a domain whitelist
      - fs_crypto_domain_whitelist_ctrl_access_grant()
        Grant a client access to a domain
      - fs_crypto_domain_whitelist_ctrl_access_revoke()
        Revoke a client's access to a domain
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        Get the flags for a domain whitelist
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        Perform whitelist configuration for a domain whitelist
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        Enable encryption support on a filesystem
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        Set the domain of a file or directory
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        Mark an entire directory for migration into an encryption domain
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fs_crypto_domain_add()

QNX SDP8.0C Library ReferenceAPIDeveloper

Create a domain

Synopsis:

#include <fs_crypto_api.h>
#include <sys/fs_crypto.h>

int fs_crypto_domain_add( const char *path,
                          int domain,
                          int type,
                          int state,
                          int length,
                          const uint8_t bytes[],
                          int *preply );

Arguments:

path

The path to the filesystem's mountpoint.

domain

The domain number to add (the domain must be unused).

type

The type of encryption to employ; one of the following (defined in <fs_crypto.h>):

FS_CRYPTO_TYPE_NONE
FS_CRYPTO_TYPE_XTS — AES-256, in XTS mode
FS_CRYPTO_TYPE_CBC — AES-256, in CBC mode

state

The lock state for the new domain (1 is locked, 0 is unlocked).

length

The number of bytes available in the key array.

bytes

The binary representation of the key.

preply

A pointer to a location where the function can store additional success or error information.

Library:

libfscrypto

Use the -l fscrypto option to qcc to link against this library.

Description:

The fs_crypto_domain_add() function creates the given domain/type if it doesn't already exist. The domain is created in either the unlocked or locked state, as desired. This function calls fs_crypto_domain_add_flags() with the flags argument set to 0.

Note:

In order to use filesystem encryption, download the Encrypted Filesystem package from the QNX Software Center.
You must be in the group that owns the filesystem's mountpoint in order to create a domain.

This function sets the variable pointed to by preply to one of the following values:

FS_CRYPTO_REPLY_COMPLETE: The domain was successfully created.
FS_CRYPTO_REPLY_ERRNO: See the error code.
FS_CRYPTO_REPLY_DOMAIN_EXISTS: The domain already exists.
FS_CRYPTO_REPLY_INVALID: The command wasn't completed successfully.
FS_CRYPTO_REPLY_READONLY: The filesystem is mounted read-only.
FS_CRYPTO_REPLY_UNKNOWN_TYPE: The type argument isn't a valid type of encryption.

Returns:

EOK: Success.
EINVAL: Invalid arguments.

This function can also return any of the errors indicated by devctl(), fs_crypto_domain_unlock(), malloc(), or open().

Classification:


Safety:
Cancellation point	Yes
Signal handler	No
Thread	Yes

Page updated: August 11, 2025