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put iov_iter into msghdr

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Note that the code _using_ ->msg_iter at that point will be very
unhappy with anything other than unshifted iovec-backed iov_iter.
We still need to convert users to proper primitives.

Signed-off-by: Al Viro <[email protected]>
This commit is contained in:
Al Viro 2014-11-24 10:42:55 -05:00
commit c0371da604
33 changed files with 90 additions and 112 deletions
Download patch file Download diff file Expand all files Collapse all files

10
net/compat.c
View file

@ -37,13 +37,14 @@ ssize_t get_compat_msghdr(struct msghdr *kmsg,
struct iovec **iov)
{
compat_uptr_t uaddr, uiov, tmp3;
compat_size_t nr_segs;
ssize_t err;
if (!access_ok(VERIFY_READ, umsg, sizeof(*umsg)) ||
__get_user(uaddr, &umsg->msg_name) ||
__get_user(kmsg->msg_namelen, &umsg->msg_namelen) ||
__get_user(uiov, &umsg->msg_iov) ||
__get_user(kmsg->msg_iovlen, &umsg->msg_iovlen) ||
__get_user(nr_segs, &umsg->msg_iovlen) ||
__get_user(tmp3, &umsg->msg_control) ||
__get_user(kmsg->msg_controllen, &umsg->msg_controllen) ||
__get_user(kmsg->msg_flags, &umsg->msg_flags))
@ -68,14 +69,15 @@ ssize_t get_compat_msghdr(struct msghdr *kmsg,
kmsg->msg_namelen = 0;
}
if (kmsg->msg_iovlen > UIO_MAXIOV)
if (nr_segs > UIO_MAXIOV)
return -EMSGSIZE;
err = compat_rw_copy_check_uvector(save_addr ? READ : WRITE,
compat_ptr(uiov), kmsg->msg_iovlen,
compat_ptr(uiov), nr_segs,
UIO_FASTIOV, *iov, iov);
if (err >= 0)
kmsg->msg_iov = *iov;
iov_iter_init(&kmsg->msg_iter, save_addr ? READ : WRITE,
*iov, nr_segs, err);
return err;
}