From: "Eric W. Biederman" <ebied...@xmission.com>
This allows concentrating all of the conversion to and from kuids and
kgids into the format needed by the 9p protocol into one location.
Cc: Eric Van Hensbergen <eri...@gmail.com>
Cc: Ron Minnich <rminn...@gmail.com>
Cc: Latchesar Ionkov <lu...@ionkov.net>
Signed-off-by: "Eric W. Biederman" <ebied...@xmission.com>
---
net/9p/protocol.c | 36 ++++++++++++++++++++++++++++++++++++
1 files changed, 36 insertions(+), 0 deletions(-)
diff --git a/net/9p/protocol.c b/net/9p/protocol.c
index 3d33ecf..c289c6c 100644
--- a/net/9p/protocol.c
+++ b/net/9p/protocol.c
@@ -85,6 +85,8 @@ pdu_write_u(struct p9_fcall *pdu, const char __user *udata,
size_t size)
d - int32_t
q - int64_t
s - string
+ u - numeric uid
+ g - numeric gid
S - stat
Q - qid
D - data blob (int32_t size followed by void *, results are not freed)
@@ -163,6 +165,26 @@ p9pdu_vreadf(struct p9_fcall *pdu, int proto_version,
const char *fmt,
(*sptr)[len] = 0;
}
break;
+ case 'u': {
+ kuid_t *uid = va_arg(ap, kuid_t *);
+ __le32 le_val;
+ if (pdu_read(pdu, &le_val, sizeof(le_val))) {
+ errcode = -EFAULT;
+ break;
+ }
+ *uid = make_kuid(&init_user_ns,
+ le32_to_cpu(le_val));
+ } break;
+ case 'g': {
+ kgid_t *gid = va_arg(ap, kgid_t *);
+ __le32 le_val;
+ if (pdu_read(pdu, &le_val, sizeof(le_val))) {
+ errcode = -EFAULT;
+ break;
+ }
+ *gid = make_kgid(&init_user_ns,
+ le32_to_cpu(le_val));
+ } break;
case 'Q':{
struct p9_qid *qid =
va_arg(ap, struct p9_qid *);
@@ -377,6 +399,20 @@ p9pdu_vwritef(struct p9_fcall *pdu, int proto_version,
const char *fmt,
errcode = -EFAULT;
}
break;
+ case 'u': {
+ kuid_t uid = va_arg(ap, kuid_t);
+ __le32 val = cpu_to_le32(
+ from_kuid(&init_user_ns, uid));
+ if (pdu_write(pdu, &val, sizeof(val)))
+ errcode = -EFAULT;
+ } break;
+ case 'g': {
+ kgid_t gid = va_arg(ap, kgid_t);
+ __le32 val = cpu_to_le32(
+ from_kgid(&init_user_ns, gid));
+ if (pdu_write(pdu, &val, sizeof(val)))
+ errcode = -EFAULT;
+ } break;
case 'Q':{
const struct p9_qid *qid =
va_arg(ap, const struct p9_qid *);
--
1.7.5.4
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
