Tribblix: manual page: rsm_memseg_import

RSM_MEMSEG_IMPORT_CONNECT(3RSM) Remote Shared Memory Library Functions

NAME

rsm_memseg_import_connect, rsm_memseg_import_disconnect - create or
break logical connection between import and export segments

SYNOPSIS

cc [ flag... ] file... -lrsm [ library... ]
#include <rsmapi.h>

int rsm_memseg_import_connect(
rsmapi_controller_handle_t controller,
rsm_node_id_t nodeid, rsm_memseg_id_t segment_id,
rsm_permission_t perm, rsm_memseg_import_handle_t *memseg);

int rsm_memseg_import_disconnect(
rsm_memseg_import_handle_t memseg);

DESCRIPTION

The rsm_memseg_import_connect() function provides a means of creating
an import segment called memseg and establishing a logical connection
with an export segment identified by the segment_id on the node
specified by node_id. The controller specified by controller must
have a physical connection with the controller (see
rsm_get_interconnect_topology(3RSM)) used while exporting the segment
identified by segment_id on node specified by node_id. The perm
argument specifies the mode of access that the importer is requesting
for this connection. In the connection process, the mode of access
and the importers userid and groupid are compared with the access
permissions specified by the exporter. If the request mode is not
valid, the connection request is denied. The perm argument is limited
to the following octal values:

0400
read mode

0200
write mode

0600
read/write mode

The rsm_memseg_import_disconnect() function breaks the logical
connection between the import segment and the exported segment and
deallocates the resources associated with the import segment handle
memseg.

RETURN VALUES

Upon successful completion, these functions return 0. Otherwise, an
error value is returned to indicate the error.

ERRORS

The rsm_memseg_import_connect() and rsm_memseg_import_disconnect()
functions can return the following errors:

RSMERR_BAD_SEG_HNDL
Invalid segment handle.

The rsm_memseg_import_connect() function can return the following
errors:

RSMERR_BAD_CTLR_HNDL

Invalid controller handle.

RSMERR_CTLR_NOT_PRESENT

Controller not present.

RSMERR_PERM_DENIED

Permission denied.

RSMERR_INSUFFICIENT_MEM

Insufficient memory.

RSMERR_INSUFFICIENT_RESOURCES

Insufficient resources.

RSMERR_SEG_NOT_PUBLISHED_TO_NODE

Segment not published to node.

RSMERR_SEG_NOT_PUBLISHED

Segment not published at all.

RSMERR_BAD_ADDR

Bad address.

RSMERR_REMOTE_NODE_UNREACHABLE

Remote not not reachable.

RSMERR_INTERRUPTED

Connection interrupted.

The rsm_memseg_import_disconnect() function can return the following
errors:

RSMERR_SEG_STILL_MAPPED
Segment still mapped, need to unmap
before disconnect.

RSMERR_POLLFD_IN_USE
Poll file descriptor in use.