where are file structure operations defined??

[saumitra]

i found DECLRATION of file structure operations in kernel/fs/fs.h

there all operations are defined as "extern" where are they implemented..

as where can i find their defination???

[kingraja84]

hi ,

I am learning how to write device drivers,I found the use of file structure in order to map application level kernel interfaces like open,read,write,ioctl to the driver functions .
they r just function pointers
filestructure={
open:open_device, //see here it will be like this mapping open to device open
write:write_device
}
write_device is a function we r going to use to write to the device