Sunil Agham: > and when i invoked "ls" at mount point, its not invoking open, readdir > can anyone please help me . - find which systemcall is issued, by 'strace ls /' - usually systemcall is implemented as 'sys_<systemcall name>()' kernel function, like sys_open(). - usually sys_XXX() calls filesystem specific function via function pointer. - function pointers are registered in 'struct XXX_operations'. - when the filesystem does not register function pointers, upper layer filesystem (VFS) calls generic routine or returns 'not implemented error'. - In ramfs, generic rourintes which are registered as 'simple_dir_operations' are used. readdir(3), getdents(2), sys_getdents64(), vfs_readdir(), file->f_op->readdir() as dcache_readdir(). - You will be able to find many things in linux/Documentation/filesystems/vfs.txt. Junjiro Okajima -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
