TWI275998B - IDE apparatus hot-plug system and implementation method under Linux operating system - Google Patents

Abstract

The present invention provides an IDE apparatus hot-plug system and method under Linux operating system, which comprises an interrupt handling module, a client space handling module, an IDE registry information handling module. The method includes the following steps: first, capturing the event for IDE apparatus hot-plug; next, positioning the actual IDE apparatus occurring the hot-plug event, and analyzing the hot-plug type; separating the usage of IDE apparatus with the application program in the client space; finally, modifying the registry information in IDE controller based on the hot-plug type. The present invention could realize the plugging and unplugging of IDE apparatus during the power-on operation of the system without expensive hardware equipment and dedicated driver.

Description

1275998 V. INSTRUCTION DESCRIPTION α) [Technical Field] The present invention relates to an I DE device hot plug/pull system and an implementation method thereof, and more particularly to an I DE device hot plug/pull operation under a Linux operating system System and method. [Prior Art] IDE (Integrated Device Electronics) is a type of interface of a disk drive, also known as an ATA (AT Attachment) interface. The IDE interface model has undergone three different technological changes, upgrading from the earliest p I O (Programmed I/O) transfer to advanced DMA (Direct

Memory Access), up to now the latest Ultra DMA (Ultra Direct Memory Access) transmission method. The I DE device refers to a computer device that uses the I DE interface. At present, the standard I DE devices in our computers are nothing more than two types - hard disk and CD player. The existence of hard disk is relatively simple, and the CD player includes CD_R〇M drive, DVD-ROM drive and CD- There are three common types of r/rw disc burners. In addition, our uncommon IDE devices include ZIP floppy drives, 〇RB active hard drives, and more. In general, IDE and storage devices can be said to be almost the same as the working principle of the specific I DE device and the surname of the 媸 , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , By the same controller, the second commander uses the same instruction system to complete the system. From the specific place, #though the same thing is expressed in the data connection surface shape and setting method of the device are almost the same. Tail, see

12759% V. Hair -------------- Interacting with IDE devices is the IDE controller 'early 8〇86, 286 Separate 8, generation (even in the early 4 8 6 era)' 1 (four) devices are required One device comes to the $ control card to connect to the 1 DE device, and through the 1 DE control on this card, the various access operations of the device! But since the 48 6 era, until now, the control device has been integrated into the south bridge of the system's chipset, these chipsets provide the same configuration to integrate two Ε controllers, each controller It can connect two ide devices (both Wang and slave). There is also a 丨DE controller on the I DE device to complete the IDE control commands and data monitoring/transmission functions between the device and the host. However, the presence of these controllers is completely different from the host side (integrated in the chipset) due to the different jDE devices. Simply put, the entire iDE is a subsystem consisting of an IDE device, a host/device I DE controller, an I DE data connection/transmission cable, and an interface. · The so-called hot plugging refers to the hardware that plugs in/out the computer. Hot plugging can save time for computer shutdown and restart, and it can reduce the impact on the hardware caused by excessive computer startup current when switching on and off, so it is favored among advanced computer users. The existing I DE device hot plug implementation has the following two methods: one uses a dedicated hardware device, on the basis of the hardware disk array, does not require the intervention of the software (operation system) to realize the IDE device Hot plug / pull. This method of hardware equipment is expensive and only suitable for high-end servos. Another method requires a dedicated driver for installing the I DE controller.

1275998 V. Invention Description (3) " -------- Realize the hot plugging and unplugging of IDE devices. This driver ί i on the controller 'universal is not strong. At the same time... (4) The special driver for hot plugging/unplugging is not easy to obtain. = How to eliminate the need for dedicated hardware devices and dedicated drivers. 2. The method of hot plugging/unplugging of I DE devices with low cost and good versatility has become an urgent problem in the industry. [Summary of the Invention] The second X) Feng solves the above problems and provides an implementation method of I DE spoof hot plug/pull in the L i nux operating system, which does not require expensive hardware devices and dedicated drivers. Insertion and removal of IDE devices during live operation. The invention provides an IDE device hot plug/unplug system for a Linux operating system, which is used for inserting and extracting a device during a live operation of a Linux operating system. The system includes an interrupt processing module for Automatically detect and analyze the hardware interruption caused by the hot plug operation of the IDE device; a user space processing module 'is used to connect the IDE device according to the plug/unplug type after receiving the notification sent by the interrupt processing module The application is separated in the user space; and an I DE registration information processing module is used to modify the registration information of the DE device according to the processing situation of the user space and the plug/unplug type. The invention further provides an implementation method for hot plugging/unplugging of the I DE device under the L i nux operating system, which realizes insertion and extraction of the I DE device during the live operation of the L i nux operating system, the method first capturing the 丨DE device Hot plug/unplug event, then locate the specific 丨DE device where the hot plug/unplug event occurs and

$7:1275998 V. INSTRUCTIONS (4) Analyze the plug/unplug type, then separate it from the application in the user space according to the usage of the DE device, and finally modify the registration in the I DE controller according to the plug/pull type. News. The invention realizes the insertion and extraction operation of the I DE device at the level of the L i nux operating system by dynamically modifying the data structure information of the I DE device in the L i nux core, and does not require a dedicated hardware device and a dedicated driver, and mainly utilizes The software is processed at a low cost and is versatile. [Embodiment] As shown in FIG. 1 , the present invention provides a method for implementing hot plugging/unplugging of an IDE device under a Li nux operating system, and inserting and removing an I DE device during a live operation of the Linux operating system. The method first captures the I DE device hot plug/unplug event (step 1 0 1); then locates the specific I DE device in which the hot plug/pull event occurs and analyzes the plug/pull type (step 1 〇 2); The use of the IDE device separates it from the application in the user space (step 1 0 3); finally, the registration information in the IdE controller is modified according to the plug/unplug type (step 104). For a further clear description of the implementation of the present invention, please refer to FIG. 2, which is a schematic diagram of a module architecture of the present invention. The function module is divided into kernel space according to the characteristics of the Luxux, and the π IDE registration information processing module is interrupted. Modules and user space "user space processing module" three modules. The I D Ε controller generates a hardware interrupt when a hot plug/unplug event occurs. The "Interrupt Processing Module" registers an interrupt handler to capture hot plug/unplug events. After the hot plug/pull event is captured, the interrupt processing module is analyzed for the cause of the interrupt: the specific I DE controller and the insert/pull type. then

Page 8 1275998 V. Description of the invention (5) The "User Space Processing Program" will be notified for processing. The π user space processing module π is designed as a daemon process that is automatically executed and waits after the L i n u X system is started. After receiving the notification of the interrupt processing module '', the 'user space handler' completes the processing required by the user space: before the device is unplugged, the application of the device is terminated and the device is secured. After the processing is completed, the π I DE registration information processing module is called, '. ID Ε Registration> § hole processing module, 'responsible for processing linu X kerne 1 (nuclear ~) in the IDE is not ready Registration information. The registration information about the IDE device in the Linux kernel is stored in an array, and each unit of the array corresponds to an IDE device. By modifying the array, the registration or logout operation of the I DE device can be performed in Linux kerne. Therefore, the 丨DE device insertion and removal are realized. The following describes the implementation method of the present invention from the processing flow of each module. FIG. 3 is a flowchart of the interrupt processing module, and the π interrupt processing module can be designed as a Linux Kernel. Loading the module, after the module is initialized, register an interrupt handler function (step 3〇1), the interrupt handler function is in a wait state, waiting An interrupt occurs (step 3〇2). When an ide hot swap event occurs, a hardware interrupt is generated that triggers the interrupt processing function. The interrupt handler determines the specific cause of the interrupt and determines which I DE controller is hot-plugged/unplugged, whether it is inserted or removed (step 3 〇 3). Wake up the n user space handler " for processing (step 3〇4). The interrupt processing module then continues to wait, waiting for the next interrupt to occur. among them,

$9页 1275998 V. Inventions " ---- Hu Jinshi Tian Shiming plug-in/pull type is based on the type of hardware interrupt, to determine whether the current operation of Df# is inserted or removed. & Figure 4 is a flow chart of the user space processing module. After the user program starts, the user enters the sleep state and waits for the interrupt processing module to wake up (steps 4 0 1, 4 0 2). After being awakened, the specific device in the process is first acquired (step 4 0 3), and then it is judged whether the device is inserted or removed (step 4 0 4). If it is an insert operation, no further processing is performed, = call I DE registration information processing module π (step 4 〇 8), and π I DF is used to process the processing board group π for further processing. If the interrupt type is the operation of the controller, the controller is judged to be used by the application (step 4 0 5). If no application uses this controller, it means that the controller can be safely removed, can be called directly, and the j DE registration information processing module π is processed. If the controller has been used, determine if the controller is part of the disk array and if there is redundancy (step 4 06). If the controller has redundancy, indicating that the removal of this controller does not affect the use of the application, the controller can be removed from the redundancy (step 4 0 9). Then call "I DE Registration Information Processing Module" for processing. If the controller is not redundant, it is necessary to forcefully terminate the user program using this control 11 (step 4 0 7), clear the use of the controller, and then the parent "I DE registration information processing module" for further processing. , mouth > Su information Figure 5 is the I DE registration information processing module flow chart. π I w, processing module, 'run in the Linux core space 'by π user space processing ^ type" call, processing IDE devices Data structure. First through ide one

1275998 V. INSTRUCTIONS (7) The array acquires the data structure of the specified controller (step 5 〇丨). Determine the hot plug/pull type (step 5 0 2) ‘If it is an insert operation, call the core function ide—init a hwif — ports to initialize the controller's hardware parameters (step 5 0 3). Then, through the core functions 丨de_probe_in〇du 1 e, create a proc-ide-interfaces, ide-driver-module probe controller, the registration information is filled into the data structure of the controller (step 504). Then set the controller's DΜA mode (505) through the core function ide__setup__dma, and then call the core functions ide_dma_check and set_using a dma for DMA (Direct Memory Access) mode (step 506). At this point, the controller information has been correctly added to the core data structure, and the user program can also access the I DE controller. The controller's insert operation ends. If the plucking operation is performed, the core function i d e _ u n r e g i s t e r is called to clear the registration information of the controller (step 5 〇 7). The controller is then removed. DETAILED DESCRIPTION OF THE INVENTION In order to specifically describe the technology of the present invention, a specific embodiment will be described. For example, in the _ storage server, there is an I DE controller slot in the idle state. The process of inserting a controller into the slot is as follows: First, the interrupt processing module detects that the interrupt occurs and determines an I DE The controller is inserted into the system and the user space handler is called. The user space processing program judges the I D E insertion operation, and does not process, directly calls the I D E statement book information processing module. The I D E registration information processing module obtains the data structure of the controller and initializes the hardware parameters. The probe controller populates the registration information into the data structure of the controller. Initialize the DMA parameters of the controller and start

1275998 V. Description of invention (8) DMA method. The above is only the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention; that is, the equivalent changes and modifications made by the scope of the patent application are covered by the scope of the patent application. .

Page 12 1275998 Brief Description of the Drawings FIG. 1 is a flow chart of a method for implementing hot plugging/unplugging of I DE devices in the L i nux operating system of the present invention; FIG. 2 is a diagram showing I DE devices under the L i nux operating system of the present invention. Hot plug/unplug system module architecture diagram, FIG. 3 is a processing flowchart of the interrupt processing module proposed by the present invention; FIG. 4 is a processing flowchart of the user space processing module proposed by the present invention; The figure is a processing flowchart of the I DE registration information processing module proposed by the present invention.

[Description of Schematic] Step 1 0 1 Capture I DE device hot plug/pull event Step 1 0 2 Locate the specific I DE device where the hot plug/pull event occurs and analyze the plug/pull type step 1 0 3 According to the I DE The device usage separates it from the application in user space. Step 1 0 4 Modify the registration information in the I DE controller according to the plug/unplug type. Step 3 0 Register the interrupt handler Step 3 0 2 Wait for the interrupt to occur Step 3 0 3 Determine the specific content of the interruption

Step 3 0 4 Wake up the user space processing module Step 4 0 1 Wait for the interrupt processing module to wake up the notification Step 4 0 2 Whether to wake up by interrupt Step 4 0 3 Obtain the specific device that interrupted Step 4 0 4 Is the extraction operation

Page 13 1275998 Schematic description step 4 0 5 Whether the controller is used Step 406 Controller has redundancy Step 4 0 7 Force termination of the program using the controller Step 4 0 8 Call I DE Registration Information Processing Module Step 4 0 9 Remove controller from redundancy Step 5 0 1 Get the data structure of the controller Step 5 0 2 Is the insertion operation step 5 0 3 Initialize the hardware parameters of the controller

Step 5 0 4 Detect the controller and fill the registration information to the controller's data structure. Step 5 0 5 Set the controller's DMA mode Step 5 0 6 Enable the ΜΑ mode Step 5 0 7 Clear the controller registration information

Page 14

Claims (1)

1275998 VI. Patent Application No. 1 'The I DE device hot plug/pull system under the L i nux operating system is used to realize the insertion and removal of the I de device during the live operation of the L i nux operating system. The system includes : an interrupt processing module for automatically detecting and analyzing hardware interrupts caused by hot plug/unplug operation of the IDE device; a user space processing module for inserting the notification sent by the interrupt processing module according to the insertion /Drawing type to separate the IDE device from the application in the user space; and an I DE registration information processing module for modifying the registration information of the I DE device according to the processing situation of the user space and the plug/unplug type . 2. The I DE device hot plug/pull system under the L i nux operating system described in the first application of the patent scope, wherein the interrupt processing module is designed as a L i n u X core (Kernel) loadable module. 3. The I DE device hot plug/unplug system under the L i nux operating system described in claim 1 of the patent scope, wherein the user space processing module is automatically in a waiting state after the L丨nux operating system is started up until receiving The processing of the interrupt processing module is performed after the notification. 4. If the L丨nux operating system described in item 1 of the patent application scope is selected, the DE device hot plug/pull system is installed. The IDE registration information processing module operates in the core space of the LinUx. The implementation of the hot plugging/unplugging of the IDE device under the L丨nux operating system, the insertion and removal of the I DE device during the live operation of the L 1 nUX operating system, the method comprising the following steps: capturing the hot plug of the IDE device / pull event; Page 15 Ϊ 275998 VI. Patent Application Scope The specific I DE device in which the hot plug/unplug event occurs is analyzed and the plug/unplug type is analyzed; according to the usage of the I DE device, it is separated from the application in the user space; / Pull type to modify the registration information in the I DE controller. 6. The method for implementing hot plugging/unplugging of an I DE device under the L i nux operating system according to claim 5, wherein the step of capturing a hot plug/unplug event and analyzing the plug/pull type includes the following steps. : registering an interrupt handler and waiting for an interrupt to occur; triggering the interrupt handler when an I DE device hot plug/pull event occurs; and determining, by the interrupt handler, which 丨DE controller is hot swapped, is it inserted or removal. 7. The method for implementing hot plugging/unplugging of an IDE device under the Linux operating system described in claim 5, wherein the plugging/unplugging type is a step of separating the IDE device from the application in the user space. , the next step · · Obtain the specific IDE device that has been interrupted and determine whether it is the removal operation to determine whether the device is used by the application; if the device is used by the application, the column-part, whether there is redundancy or not If the device is not redundant, the terminal program is forced to clear the use of the device. The user application is not available. 8. The implementation of the L hot plug/pull as described in claim 5 The method, wherein the pull type of the IDE device in the plug-in Ux operating system is the removal type, the repair 1275998 VI. Application for Patent Range The procedure for changing the registration information in the I DE controller is to clear the registration information of the I DE device controller. 9. The method for implementing hot plugging/unplugging of an I DE device under the L i nux operating system according to claim 5, wherein the step of clearing the controller registration information is implemented by using a Kernel function ide_unregister. of. 1 0. The method for implementing hot plugging/unplugging of an I DE device under the L i nux operating system according to claim 5, wherein the insert/pull type is an insertion, the registration information in the modified I DE controller The steps further include the following steps: Get the data structure of the specified controller; initialize the hardware parameters of the controller; probe the controller, fill the registration information into the data structure of the controller; set the DMA mode of the controller; and enable the DMA mode. Page 17