JPS6389960A - Remote file access control system - Google Patents

Abstract

PURPOSE:To reduce the number of logic processings, to improve the activity ratio of a main memory device, and to reduce load on its own electronic computer, by performing check accessing whether it is remote accessing or local accessing at a first stage of interruption processing. CONSTITUTION:When the remote file accessing of a user program from the electronic computer A to B is performed, an interruption processing part 10 investigates the accessing whether it is the remote file accessing, and performs the branching of remote/local accessing. Branched remote file accessing assembles the bit of parameter information of a supervisor call (SVC) in a packet at a packet generating part 11, and sends the packet from a transmission part 3 to the electronic computer B through a local area network (LAN) control part 4, and a LAN5. At the computer b, a packet receiving signal 6B receives the packet, and a local SVC issuing part 7 issues a local SVC call. And it is branched and processed according to the kinds of calls at a processing part 8, and a bit of information obtained from the above result is assembled in the packet by a response generating part 9, and is sent back again to the computer A by a transmission part 3B.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a remote file access control method for accessing each other's files between computers forming a local area network (LAN).

[Conventional technology]

Conventionally, the following methods have been known for accessing files of one computer from a terminal of another computer forming a LAN system.

FIG. 2 shows the configuration of a LAN in which the conventional method is implemented.

In the same figure, A is one electronic computer (own computer),
1 is an interrupt processing section, 2 is an SVC call processing section, 3 is a packet transmission section, 4 is a LAN control section, 5 is a local area network, and 6 is a packet reception section.

B is the other electronic computer (other computer) connected by the local area network 5, 3B is a packet transmitter, 4B is a LAN controller, 6B is a packet receiver, 7 is a local SVC call issuer, 8 is local SV
C call processing section 9 is an SVC response packet creation section.

Next, the operation will be explained. Consider a case where a user program remotely accesses computer B from computer MA. When a user program issues a certain SVC call, an interrupt occurs. The interrupt processing unit 1 branches depending on the type of SVC call, and after branching, the SVC processing unit 2 checks whether it is a remote access.

The branched local access program is processed within its own calculation Nu, and processing information is sent back to the user.

The branched remote access program assembles the parameter information of the S■C call into a packet, and the bucket transmitter 3 sends it to the requested computer B via the LAN controller 4 and the local area networks 5. and send that packet. In computer B, packet receiving unit 6B
When the packet is received, the local SVC issuing unit 7 issues a local SC call, which is processed by the local SVC processing unit 8. The SVC response packet creation unit 9 assembles the information obtained as a result into a packet, and the packet transmission unit 3B sends the broken packet again to the LA
It is sent back to the requesting computer A via the N control unit 4B and the local area network 5. The packet receiving unit 6 that receives the returned packet sends back necessary information to the user based on the information.

[Problem that the invention seeks to solve]

Conventional remote access methods do not work as described above. Therefore, every time a supervisor call (SVC) is processed from a user program, even remote processing programs unrelated to the own computer are processed. Since branching was performed depending on the type, there were problems in that the number of logic processes increased, the main memory was inefficiently used, and the load on the self-weighted computer increased.

This invention was made to solve the above-mentioned problems. By checking whether the access is remote or local at the first interrupt processing stage, logic processing can be reduced and the main memory can be used more efficiently. The purpose is to increase efficiency and reduce the load on the self-weight calculator.

[Means for solving problems]

In this invention, in response to a supervisor call from a user program to the self-computing IaA, branching is performed between remote access and local access at the initial interrupt processing stage, and in the case of remote access, to another computation RB, The parameter information of the supervisor call is immediately sent as a packet.

[Effect]

The load on the computer A can be reduced by branching based on the type of processing only for local accesses to the computer A. In the case of remote access, the information is immediately sent to the designated fine needle calculator B, resulting in remote access with less delay.
The utilization rate of the entire LAN can be improved.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows the configuration of a LAN to which the present invention is applied.

In FIG. 1, A is one computer, 10 is an interrupt processing section, 11 is a packet creation section, 3 is a packet transmission section,
4 is a LAN controller, 5 is a local area network, and 6 is a packet receiver.

Thus, B is the other computer, 3B is the packet transmitter, and 4 is the other computer.
B is 1. , AN control unit, 6B is a packet reception unit, 7 is a local SVC call issuing unit, 8 is a local SVC call processing unit, and 9 is an SVc response packet creation unit.

Next, the operation will be explained.

Consider a case where a user program remotely accesses a file from computer A to computer B. When a user program issues a certain SVC call, an interrupt occurs. The interrupt processing unit 10 immediately checks whether it is a remote I... file access and branches to remote/local access. The local access program branches within its own computer A depending on the type of SVC call and processes the SVC call. It then sends processing information back to the user. Here, the remote access program is branched depending on the type and passed to the thin needle calculator B as is, thereby reducing the logic processing of the own computer A.

For branched remote file access, cool parameter information is sent to the packet creation unit 1 to the corresponding SV.
1, the packet is assembled into a packet, and the packet transmitter 3 sends the packet to the requested electronic computer B via the LAN controller 4 and local area network 5.

In computer B, when the packet receiving section 6B receives a packet, the local/l/SV C♀ line section 7 issues a local SVC call, which is branched and processed by the local SVC processing section 8 depending on the type. . The response packet creation unit 9 assembles the information obtained as a result into a packet, and the resulting packet is sent to the packet transmission unit 3B.
Then, it is sent back to the requesting computer A via the LAN control unit 4B and the communication path medium 5.

The packet receiving unit 6 that received the returned packet,
Based on that information, the necessary information is not sent back to the user.

In this way, the load on one computer A can be reduced and the other computers laB can be immediately asked about the download, so a LAN system with less delay can be constructed. In the above embodiment, two computers have been described, but three or more computers may be used.

〔Effect of the invention〕

As explained above, according to the present invention, in response to a supervisor call from a program to a computer program, a branch is made between remote access and local access in the initial interrupt processing stage, and remote access is performed. In this case, the parameter information of the supervisor call is immediately sent as a packet to the other computers, so the processing related to the fine needle calculator is immediately transferred to data transfer, so that one computer A can concentrate only on its own processing. can. In addition, it can increase the usage efficiency of the main memory and reduce the load on the computer.
This has the effect of improving the processing capacity of the entire LAN.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a LAN system to which the remote file access control method of the present invention is applied, and FIG. 2 is a block diagram of a system to which the conventional method is applied. 3.3B...Packet transmission unit, 4,4B...=7- LAN control unit, 5...Communication path medium, 6,6B...
Packet receiving section, 7...Local SVC issuing section, 8.
...Local SVC processing unit, 9...SVC response generation unit, 10...Interrupt processing unit, 1■...Packet generation unit, A, B...Computer. Agent Masuo Oiwa (and 2 others) = 8-

Claims (1)

[Scope of Claims] In remote file access performed between a local area network and another computer, initial interrupt processing is performed in response to a supervisor call from a user program to the local computer. A remote file access control method characterized in that branching is performed between remote access and local access at each stage, and in the case of remote access, supervisor call parameter information is immediately sent as a packet to another computer.