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[PATCH] x86_64: Add compat_sys_vmsplice and use it in x86-64

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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:
Andi Kleen 2006-05-01 12:15:48 -07:00 committed by Linus Torvalds
parent 5e7dd2ab6b
commit d261020229
2 changed files with 21 additions and 0 deletions
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1
arch/x86_64/ia32/ia32entry.S
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@ -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
View File

@ -1317,6 +1317,26 @@ out:
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.