redonkable
/
remarkable-linux
1
0
Fork 0
Code Releases Activity

SUNRPC: track whether a request is coming from a loop-back interface. 

If an incoming NFS request is coming from the local host, then
nfsd will need to perform some special handling.  So detect that
possibility and make the source visible in rq_local.

Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
wifi-calibration
NeilBrown 2014-05-12 11:22:47 +10:00 committed by J. Bruce Fields
parent c789102c20
commit ef11ce2487
4 changed files with 20 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
include/linux/sunrpc/svc.h
View File

@ -254,6 +254,7 @@ struct svc_rqst {
u32 rq_prot; /* IP protocol */
unsigned short
rq_secure : 1; /* secure port */
unsigned short rq_local : 1; /* local request */
void * rq_argp; /* decoded arguments */
void * rq_resp; /* xdr'd results */

1
include/linux/sunrpc/svc_xprt.h
View File

@ -64,6 +64,7 @@ struct svc_xprt {
#define XPT_DETACHED 10 /* detached from tempsocks list */
#define XPT_LISTENER 11 /* listening endpoint */
#define XPT_CACHE_AUTH 12 /* cache auth info */
#define XPT_LOCAL 13 /* connection from loopback interface */
struct svc_serv *xpt_server; /* service for transport */
atomic_t xpt_reserved; /* space on outq that is rsvd */

13
net/sunrpc/sunrpc.h
View File

@ -43,6 +43,19 @@ static inline int rpc_reply_expected(struct rpc_task *task)
(task->tk_msg.rpc_proc->p_decode != NULL);
}
static inline int sock_is_loopback(struct sock *sk)
{
struct dst_entry *dst;
int loopback = 0;
rcu_read_lock();
dst = rcu_dereference(sk->sk_dst_cache);
if (dst && dst->dev &&
(dst->dev->features & NETIF_F_LOOPBACK))
loopback = 1;
rcu_read_unlock();
return loopback;
}
int svc_send_common(struct socket *sock, struct xdr_buf *xdr,
struct page *headpage, unsigned long headoffset,
struct page *tailpage, unsigned long tailoffset);

5
net/sunrpc/svcsock.c
View File

@ -874,6 +874,10 @@ static struct svc_xprt *svc_tcp_accept(struct svc_xprt *xprt)
}
svc_xprt_set_local(&newsvsk->sk_xprt, sin, slen);
if (sock_is_loopback(newsock->sk))
set_bit(XPT_LOCAL, &newsvsk->sk_xprt.xpt_flags);
else
clear_bit(XPT_LOCAL, &newsvsk->sk_xprt.xpt_flags);
if (serv->sv_stats)
serv->sv_stats->nettcpconn++;
@ -1119,6 +1123,7 @@ static int svc_tcp_recvfrom(struct svc_rqst *rqstp)
rqstp->rq_xprt_ctxt = NULL;
rqstp->rq_prot = IPPROTO_TCP;
rqstp->rq_local = !!test_bit(XPT_LOCAL, &svsk->sk_xprt.xpt_flags);
p = (__be32 *)rqstp->rq_arg.head[0].iov_base;
calldir = p[1];