Hello Xiao Yang,
On 10/5/18 4:50 AM, Xiao Yang wrote:
According to the following kernel code, preadv2(2)/pwritev2(2) with
an unknown flag actually returned EOPNOTSUPP instead of EINVAL:
----------------------------------------------------------------
static inline int kiocb_set_rw_flags(struct kiocb *ki, rwf_t flags)
{
if (unlikely(flags & ~RWF_SUPPORTED)) {
return -EOPNOTSUPP;
}
...
}
static ssize_t do_loop_readv_writev(struct file *filp, struct iov_iter *iter,
loff_t *ppos, int type, rwf_t flags)
{
...
if (flags & ~RWF_HIPRI)
return -EOPNOTSUPP;
...
}
Signed-off-by: Xiao Yang <yangx.jy@xxxxxxxxxxxxxx>
Thanks. Patch applied.
Cheers,
Michael
---
man2/readv.2 | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/man2/readv.2 b/man2/readv.2
index 4441e92..2d73007 100644
--- a/man2/readv.2
+++ b/man2/readv.2
@@ -312,7 +312,7 @@ The vector count,
.IR iovcnt ,
is less than zero or greater than the permitted maximum.
.TP
-.B EINVAL
+.B EOPNOTSUPP
An unknown flag is specified in \fIflags\fP.
.SH VERSIONS
.BR preadv ()
