Hi guys, I am answering my own question. The undermentioned procedures are okay. I think there were something wrong with my pointers which I used for printing out the information. Jon. -----Original Message----- From: kernelnewbies-bounce@nl.linux.org [mailto:kernelnewbies-bounce@nl.linux.org] On Behalf Of Jonathan Khoo Sent: Monday, December 10, 2001 10:55 PM To: kernelnewbies@nl.linux.org Subject: Regarding about iovec Hi guys, I have some queries about iovec. Please take a look at the following codes: size and len are both 52. There are 2 iov in msg_iov. The 1st is 16 bytes and the 2nd is 36 bytes. memcpy_fromiovec(skb_put(skb, size), msg->msg_iov, len); (user->kernel) skb_copy_datagram_iovec(skb, 0, msg->iov, 52); (kernel->user) The funny thing is that although I did not modify skb, the returning msg->iov gives me a zeroed structure. Does anyone know where did I go wrong? I actually tested this by placing the 2nd statement directly after the 1st memcpy. In fact, I rip the 2 lines off netlink_sendmsg and netlink_recvmsg. Thanks for any help in advance! Cheers, Jonathan -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ IRC Channel: irc.openprojects.net / #kernelnewbies Web Page: http://www.kernelnewbies.org/ -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ IRC Channel: irc.openprojects.net / #kernelnewbies Web Page: http://www.kernelnewbies.org/
