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The SSADISK_ISAL_CMD ioctl uses the following fields of the ssadisk_ioctl_parms
structure:
dsb
result Contains the Independent Packet Network (IPN) result word that is returned by
u0.isal.parameter_descriptor
u0.isal.transmit_descriptor
u0.isal.receive_descriptor
u0.isal.status_descriptor
u0.isal.minor_function
Note: Structures that are provided in the /usr/include/ipn/ipnsal.h file can be used to
Return Values
If the command was successfully sent to the adapter card, this operation returns a
value of 0. Otherwise, a value of -1 is returned, and the errno global variable set to one
of the following values:
EIO
EINVAL
EPERM
ENOMEM
If the return code is 0, the result field of the ssadisk_ioctl_parms structure is valid.
This indicates whether the adapter was able to process the command successfully.
Contains the directive status byte that is returned for the command. The byte
contains a value from the /usr/include/ipn/ipndef.h file. A non-zero value
indicates an error.
IPN for the command. The word contains values from the
/usr/include/ipn/ipntra.h file. A non-zero value indicates an error.
Set by the caller to indicate the buffer for parameter data.
Set by the caller to indicate the buffer for transmit data.
Set by the caller to indicate the buffer for received data.
Set by the caller to indicate the buffer for status data.
Set by the caller to one of the ISAL commands that is defined in the
/usr/include/ipn/ipnsal.h file and listed at the start of the description of this
operation.
format the contents of the parameter buffer for the various commands. The
device driver always overwrites, with the correct handle, the handle that is
located in the first four bytes of the parameter buffer.
An unrecoverable I/O error has occurred.
Either the caller has specified an ISAL command that is not in the list of
supported ISAL commands, or the caller has attempted to send an
FN_ISAL_FENCE command to an SSA physical disk.
The caller did not have an effective user ID (EUID) of 0.
The device driver was unable to allocate or pin enough memory to complete
the operation.
Chapter 13. Using the Programming Interface
279
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