Hi Lokesh On Wed, Nov 12, 2014 at 6:42 PM, lokesh kumar <[email protected]> wrote: > Hi, > > I have a question regarding open systemcall > > "open(dev_name, O_RDWR, 0)" -->userspace > > suppose devname is /dev/my_device > > Now when we look into open file operation, we have prototype > "int (*open) (struct inode *, struct file *);" > > could anyone tell me how inode and file structure pointer are filled. > > I think logic is written in fs/open.c > > but i got confused in callbacks used in it.could anyone please tell me > which topics should i cover to understand open system call. >
You should probably first understand how the file is located. See the role of lookup. > Thanks. > > _______________________________________________ > Kernelnewbies mailing list > [email protected] > http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies -- ---P.K.S _______________________________________________ Kernelnewbies mailing list [email protected] http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
