forked from luck/tmp_suning_uos_patched
[PATCH] x86_64: Add compat_sys_vmsplice and use it in x86-64
Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
parent
5e7dd2ab6b
commit
d261020229
|
@ -695,4 +695,5 @@ ia32_sys_call_table:
|
|||
.quad sys_splice
|
||||
.quad sys_sync_file_range
|
||||
.quad sys_tee
|
||||
.quad compat_sys_vmsplice
|
||||
ia32_syscall_end:
|
||||
|
|
20
fs/compat.c
20
fs/compat.c
|
@ -1317,6 +1317,26 @@ compat_sys_writev(unsigned long fd, const struct compat_iovec __user *vec, unsig
|
|||
return ret;
|
||||
}
|
||||
|
||||
asmlinkage long
|
||||
compat_sys_vmsplice(int fd, const struct compat_iovec __user *iov32,
|
||||
unsigned int nr_segs, unsigned int flags)
|
||||
{
|
||||
unsigned i;
|
||||
struct iovec *iov;
|
||||
if (nr_segs >= UIO_MAXIOV)
|
||||
return -EINVAL;
|
||||
iov = compat_alloc_user_space(nr_segs * sizeof(struct iovec));
|
||||
for (i = 0; i < nr_segs; i++) {
|
||||
struct compat_iovec v;
|
||||
if (get_user(v.iov_base, &iov32[i].iov_base) ||
|
||||
get_user(v.iov_len, &iov32[i].iov_len) ||
|
||||
put_user(compat_ptr(v.iov_base), &iov[i].iov_base) ||
|
||||
put_user(v.iov_len, &iov[i].iov_len))
|
||||
return -EFAULT;
|
||||
}
|
||||
return sys_vmsplice(fd, iov, nr_segs, flags);
|
||||
}
|
||||
|
||||
/*
|
||||
* Exactly like fs/open.c:sys_open(), except that it doesn't set the
|
||||
* O_LARGEFILE flag.
|
||||
|
|
Loading…
Reference in New Issue
Block a user