CODEWITHSUNDEEP
linuxlinux-kernelkernelkernel-modulesystem-calls
poe123
poe123

Reputation: 1208

Process-specific data in kernel

Say I have some process calling file device operation like read. Before this read the process also called a syscall(defined by me), providing me with some information relevant to the read(and possibly other future reads done by this process). What is the best way of achieving this sort of information flow in the kernel? Is there any good way to store process-specific information other than making some pid-indexed list?

I'd like the syscall information stored in kernel to be inherited by children of that process too. Would it be possible to achieve that without (somehow) traversing the process child-parent tree(and that wouldn't give me the inheritance I want because after forking I don't want changes in parent to affect the child)?

Upvotes: 1

Views: 156

Answers (1)

Obscure Geek
Obscure Geek

Reputation: 749

Just like we have init_task variable which gives the starting address of the runqueue and which can be accessible anywhere in the user as well as kernel space, you can add a variable which will be set to the appropriate value by your system call and then accessed by your read(appropriate) methods.

Upvotes: 1

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