trunc() and ftrunc() equivalent in linux kernel module

Question

I wanted to know truncate() equivalent function for Linux Kernel Module. I want to selectively truncate data in a file in kernel module starting from an index and ending at another index. All suggestions are welcome.

Thanks.

Avoid doing that in kernel land. Consider [FUSE](http://en.wikipedia.org/wiki/Filesystem_in_Userspace) — Basile Starynkevitch, Mar 02 '14 at 18:32
Why do you think you need to do file operations in kernel code? — CL., Mar 03 '14 at 10:14

score 0 · Answer 1 · edited May 23 '17 at 12:30

0

You would have go one level lower and use Virtual File System level functions. which will allow you to call truncate directly.

Here is an example for open/close, read/write in kernel space. You may use the equivalent vfs_trunc(...) method

But there are many discussion why you should NOT do that.

edited May 23 '17 at 12:30

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answered Jan 25 '16 at 09:33

hengsti

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trunc() and ftrunc() equivalent in linux kernel module

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