for a socket file , what does "file->f_op->poll()" do ?
henriquesilvar at gmail.com
Fri Jan 11 15:02:16 EST 2013
In the file_operations struct, it is a pointer to another function that
your module/code should implement. The file_operations struct, like many
others in the kernel, contains a generic set of functions that the kernel
expect your code will implement.
In the proc fs for example, mounts_poll (
http://lxr.linux.no/linux+v188.8.131.52/fs/proc/base.c#L639) is an
implementation of the poll function that is later associated with the
pointer of the file_operations structure at
Take a look at the LDD (http://lwn.net/Kernel/LDD3/) to learn how a driver
implementation should use these kind of functions to understand it better.
On Fri, Jan 11, 2013 at 12:14 AM, horseriver <horserivers at gmail.com> wrote:
> for a socket file point , what will this function do ?
> file->f_op->poll(); ///poll is declared in the file-operations
> struct .
> but I do not find this function's definition .
> Is there some advice?
> Kernelnewbies mailing list
> Kernelnewbies at kernelnewbies.org
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