5 results about "Ioctl" patented technology

This invention discloses a GPU memory virtualization method and apparatus based on deep parsing of the ioctl protocol, belonging to the field of electronic information technology. The method includes: intercepting ioctl system call requests initiated by the target container to obtain ioctl system call requests for GPU memory management; parsing its parameter blocks and extracting memory-related instructions to obtain memory-related instructions for subsequent auditing; constructing a shadow object tree and intelligently auditing memory allocation and mapping operations to obtain a precise memory usage ledger; determining whether the quota has been exceeded and executing interception during the physical admission control phase to obtain a control result on whether instruction pass-through is allowed; implementing view virtualization and returning virtualized memory information to the application in the target container to achieve transparent application adaptation, thereby completing precise virtualization isolation and multi-tenant secure sharing of GPU memory. This invention combines kernel-level control strength with user-space deployment flexibility.

Disclosed are systems and methods for blocking the malicious activity of legitimate drivers. An example method comprises collecting information about protected objects and information about drivers loaded in an operating system (OS) of a computer system; detecting at least one legitimate driver using information about the drivers loaded into the OS and malicious activity detection rules; intercepting an Import Address Table (IAT) call and / or an input / output control (IOCTL) system call made by at least one legitimate driver; determining if the intercepted call is directed to a protected object and triggers a malicious activity detection rule that requires blocking of the intercepted call; and blocking the intercepted call from detected legitimate drivers directed to the protected object based on the triggered malicious activity detection rule.

The application discloses a method for fast copying of internal files of a file system, and relates to the technical field of file copying, and comprises the following steps: S1, judging whether a source file exists; S2, opening the source file; S3, opening a target file, and creating the target file if the target file does not exist; and S4, calling an ioctl interface realized by the file system to complete the relevant index of data content and the target file. The method for fast copying of internal files of the file system is different from physical copying of a traditional file system, utilizes the support of an efficient Copy on Write of a btree data structure, realizes a logical copying operation of the file system, and when a file is to be copied, the system does not copy original data of the file, but copies metadata describing the file, so that the source file and the target file share a same physical storage space, the effect of file copying is achieved, the logical copying has a lower time delay, and a better space utilization rate is achieved.

Embodiments of the present application provide a kind of solid state disk testing method, device and electronic equipment, wherein the method comprises: reading the memory address of control register stored in the target register of solid state disk;First virtual address is applied to mainboard, and test operation command for solid state disk is written in first virtual address;According to the first physical address corresponding to first virtual address determined by pre-configured physical page document, test operation command is written in first physical address according to preset protocol rule;First physical address is written in the memory address of control register;Test operation command is executed by control register, and test command execution result is obtained. In this way, avoid using encapsulated ioctl function, linux application layer can be realized to send test operation command to solid state disk, improve the test effect of solid state disk, reduce the test cost of solid state disk.

This application provides a hardware request scheduling method and system based on kernel ioctl hijacking. The method includes: intercepting character device ioctl requests, obtaining the calling process attributes, request command codes, and parameters; rewriting the parameters of matching requests according to a pre-defined security equivalence rewriting rule verified by formal verification and differential fuzzing testing, while directly passing through unmatched requests; allocating the processed requests to corresponding priority queues according to process attributes, retrieving requests sequentially by priority and calling the device's original ioctl processing function, thereby enabling the request to be sent to the device driver for execution. This application does not require modification of existing drivers and user programs, and relies on verifiable ioctl hijacking and request aggregation mechanisms to avoid priority inversion problems and stably improve hardware scheduling throughput performance.