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new helper: msg_data_left()

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convert open-coded instances

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2014-12-15 21:39:31 -05:00
parent a2dd3793a1
commit 01e97e6517
8 changed files with 27 additions and 23 deletions
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5
include/linux/socket.h
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@ -139,6 +139,11 @@ static inline struct cmsghdr * cmsg_nxthdr (struct msghdr *__msg, struct cmsghdr
return __cmsg_nxthdr(__msg->msg_control, __msg->msg_controllen, __cmsg);
}
static inline size_t msg_data_left(struct msghdr *msg)
{
return iov_iter_count(&msg->msg_iter);
}
/* "Socket"-level control message types: */
#define SCM_RIGHTS 0x01 /* rw: access rights (array of int) */