net-timestamp: move timestamp flags out of sk_flags

sk_flags is reaching its limit. New timestamping options will not fit.
Move all of them into a new field sk->sk_tsflags.

Added benefit is that this removes boilerplate code to convert between
SOF_TIMESTAMPING_.. and SOCK_TIMESTAMPING_.. in getsockopt/setsockopt.

SOCK_TIMESTAMPING_RX_SOFTWARE is also used to toggle the receive
timestamp logic (netstamp_needed). That can be simplified and this
last key removed, but will leave that for a separate patch.

Signed-off-by: Willem de Bruijn <willemb@google.com>
----

The u16 in sock can be moved into a 16-bit hole below sk_gso_max_segs,
though that scatters tstamp fields throughout the struct.
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/include/net/sock.h b/include/net/sock.h
index 02f5b35..a211297 100644 (file)
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -67,6 +67,7 @@
 #include <linux/atomic.h>
 #include <net/dst.h>
 #include <net/checksum.h>
+#include <linux/net_tstamp.h>
 
 struct cgroup;
 struct cgroup_subsys;
@@ -278,6 +279,7 @@ struct cg_proto;
   *    @sk_protinfo: private area, net family specific, when not using slab
   *    @sk_timer: sock cleanup timer
   *    @sk_stamp: time stamp of last packet received
+  *    @sk_tsflags: SO_TIMESTAMPING socket options
   *    @sk_socket: Identd and reporting IO signals
   *    @sk_user_data: RPC layer private data
   *    @sk_frag: cached page frag
@@ -411,6 +413,7 @@ struct sock {
        void                    *sk_protinfo;
        struct timer_list       sk_timer;
        ktime_t                 sk_stamp;
+       u16                     sk_tsflags;
        struct socket           *sk_socket;
        void                    *sk_user_data;
        struct page_frag        sk_frag;
@@ -701,12 +704,7 @@ enum sock_flags {
        SOCK_LOCALROUTE, /* route locally only, %SO_DONTROUTE setting */
        SOCK_QUEUE_SHRUNK, /* write queue has been shrunk recently */
        SOCK_MEMALLOC, /* VM depends on this socket for swapping */
-       SOCK_TIMESTAMPING_TX_HARDWARE,  /* %SOF_TIMESTAMPING_TX_HARDWARE */
-       SOCK_TIMESTAMPING_TX_SOFTWARE,  /* %SOF_TIMESTAMPING_TX_SOFTWARE */
-       SOCK_TIMESTAMPING_RX_HARDWARE,  /* %SOF_TIMESTAMPING_RX_HARDWARE */
        SOCK_TIMESTAMPING_RX_SOFTWARE,  /* %SOF_TIMESTAMPING_RX_SOFTWARE */
-       SOCK_TIMESTAMPING_SOFTWARE,     /* %SOF_TIMESTAMPING_SOFTWARE */
-       SOCK_TIMESTAMPING_RAW_HARDWARE, /* %SOF_TIMESTAMPING_RAW_HARDWARE */
        SOCK_FASYNC, /* fasync() active */
        SOCK_RXQ_OVFL,
        SOCK_ZEROCOPY, /* buffers from userspace */
@@ -2160,20 +2158,17 @@ sock_recv_timestamp(struct msghdr *msg, struct sock *sk, struct sk_buff *skb)
 
        /*
         * generate control messages if
-        * - receive time stamping in software requested (SOCK_RCVTSTAMP
-        *   or SOCK_TIMESTAMPING_RX_SOFTWARE)
+        * - receive time stamping in software requested
         * - software time stamp available and wanted
-        *   (SOCK_TIMESTAMPING_SOFTWARE)
         * - hardware time stamps available and wanted
-        *   SOCK_TIMESTAMPING_RAW_HARDWARE
         */
        if (sock_flag(sk, SOCK_RCVTSTAMP) ||
-           sock_flag(sk, SOCK_TIMESTAMPING_RX_SOFTWARE) ||
+           (sk->sk_tsflags & SOF_TIMESTAMPING_RX_SOFTWARE) ||
            (kt.tv64 &&
-            (sock_flag(sk, SOCK_TIMESTAMPING_SOFTWARE) ||
+            (sk->sk_tsflags & SOF_TIMESTAMPING_SOFTWARE ||
              skb_shinfo(skb)->tx_flags & SKBTX_ANY_SW_TSTAMP)) ||
            (hwtstamps->hwtstamp.tv64 &&
-            sock_flag(sk, SOCK_TIMESTAMPING_RAW_HARDWARE)))
+            (sk->sk_tsflags & SOF_TIMESTAMPING_RAW_HARDWARE)))
                __sock_recv_timestamp(msg, sk, skb);
        else
                sk->sk_stamp = kt;
@@ -2189,11 +2184,11 @@ static inline void sock_recv_ts_and_drops(struct msghdr *msg, struct sock *sk,
                                          struct sk_buff *skb)
 {
 #define FLAGS_TS_OR_DROPS ((1UL << SOCK_RXQ_OVFL)                      | \
-                          (1UL << SOCK_RCVTSTAMP)                      | \
-                          (1UL << SOCK_TIMESTAMPING_SOFTWARE)          | \
-                          (1UL << SOCK_TIMESTAMPING_RAW_HARDWARE))
+                          (1UL << SOCK_RCVTSTAMP))
+#define TSFLAGS_ANY      (SOF_TIMESTAMPING_SOFTWARE                    | \
+                          SOF_TIMESTAMPING_RAW_HARDWARE)
 
-       if (sk->sk_flags & FLAGS_TS_OR_DROPS)
+       if (sk->sk_flags & FLAGS_TS_OR_DROPS || sk->sk_tsflags & TSFLAGS_ANY)
                __sock_recv_ts_and_drops(msg, sk, skb);
        else
                sk->sk_stamp = skb->tstamp;
@@ -2203,8 +2198,6 @@ static inline void sock_recv_ts_and_drops(struct msghdr *msg, struct sock *sk,
  * sock_tx_timestamp - checks whether the outgoing packet is to be time stamped
  * @sk:                socket sending this packet
  * @tx_flags:  filled with instructions for time stamping
- *
- * Currently only depends on SOCK_TIMESTAMPING* flags.
  */
 void sock_tx_timestamp(struct sock *sk, __u8 *tx_flags);
 

diff --git a/net/core/sock.c b/net/core/sock.c
index a741163..47c9377 100644 (file)
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -848,22 +848,13 @@ set_rcvbuf:
                        ret = -EINVAL;
                        break;
                }
-               sock_valbool_flag(sk, SOCK_TIMESTAMPING_TX_HARDWARE,
-                                 val & SOF_TIMESTAMPING_TX_HARDWARE);
-               sock_valbool_flag(sk, SOCK_TIMESTAMPING_TX_SOFTWARE,
-                                 val & SOF_TIMESTAMPING_TX_SOFTWARE);
-               sock_valbool_flag(sk, SOCK_TIMESTAMPING_RX_HARDWARE,
-                                 val & SOF_TIMESTAMPING_RX_HARDWARE);
+               sk->sk_tsflags = val;
                if (val & SOF_TIMESTAMPING_RX_SOFTWARE)
                        sock_enable_timestamp(sk,
                                              SOCK_TIMESTAMPING_RX_SOFTWARE);
                else
                        sock_disable_timestamp(sk,
                                               (1UL << SOCK_TIMESTAMPING_RX_SOFTWARE));
-               sock_valbool_flag(sk, SOCK_TIMESTAMPING_SOFTWARE,
-                                 val & SOF_TIMESTAMPING_SOFTWARE);
-               sock_valbool_flag(sk, SOCK_TIMESTAMPING_RAW_HARDWARE,
-                                 val & SOF_TIMESTAMPING_RAW_HARDWARE);
                break;
 
        case SO_RCVLOWAT:
@@ -1089,19 +1080,7 @@ int sock_getsockopt(struct socket *sock, int level, int optname,
                break;
 
        case SO_TIMESTAMPING:
-               v.val = 0;
-               if (sock_flag(sk, SOCK_TIMESTAMPING_TX_HARDWARE))
-                       v.val |= SOF_TIMESTAMPING_TX_HARDWARE;
-               if (sock_flag(sk, SOCK_TIMESTAMPING_TX_SOFTWARE))
-                       v.val |= SOF_TIMESTAMPING_TX_SOFTWARE;
-               if (sock_flag(sk, SOCK_TIMESTAMPING_RX_HARDWARE))
-                       v.val |= SOF_TIMESTAMPING_RX_HARDWARE;
-               if (sock_flag(sk, SOCK_TIMESTAMPING_RX_SOFTWARE))
-                       v.val |= SOF_TIMESTAMPING_RX_SOFTWARE;
-               if (sock_flag(sk, SOCK_TIMESTAMPING_SOFTWARE))
-                       v.val |= SOF_TIMESTAMPING_SOFTWARE;
-               if (sock_flag(sk, SOCK_TIMESTAMPING_RAW_HARDWARE))
-                       v.val |= SOF_TIMESTAMPING_RAW_HARDWARE;
+               v.val = sk->sk_tsflags;
                break;
 
        case SO_RCVTIMEO:

diff --git a/net/socket.c b/net/socket.c
index dc0cc5d..255d9b8 100644 (file)
--- a/net/socket.c
+++ b/net/socket.c
@@ -613,9 +613,9 @@ EXPORT_SYMBOL(sock_release);
 void sock_tx_timestamp(struct sock *sk, __u8 *tx_flags)
 {
        *tx_flags = 0;
-       if (sock_flag(sk, SOCK_TIMESTAMPING_TX_HARDWARE))
+       if (sk->sk_tsflags & SOF_TIMESTAMPING_TX_HARDWARE)
                *tx_flags |= SKBTX_HW_TSTAMP;
-       if (sock_flag(sk, SOCK_TIMESTAMPING_TX_SOFTWARE))
+       if (sk->sk_tsflags & SOF_TIMESTAMPING_TX_SOFTWARE)
                *tx_flags |= SKBTX_SW_TSTAMP;
        if (sock_flag(sk, SOCK_WIFI_STATUS))
                *tx_flags |= SKBTX_WIFI_STATUS;
@@ -723,12 +723,12 @@ void __sock_recv_timestamp(struct msghdr *msg, struct sock *sk,
        }
 
        memset(&tss, 0, sizeof(tss));
-       if ((sock_flag(sk, SOCK_TIMESTAMPING_SOFTWARE) ||
+       if ((sk->sk_tsflags & SOF_TIMESTAMPING_SOFTWARE ||
             skb_shinfo(skb)->tx_flags & SKBTX_ANY_SW_TSTAMP) &&
            ktime_to_timespec_cond(skb->tstamp, tss.ts + 0))
                empty = 0;
        if (shhwtstamps &&
-           sock_flag(sk, SOCK_TIMESTAMPING_RAW_HARDWARE) &&
+           (sk->sk_tsflags & SOF_TIMESTAMPING_RAW_HARDWARE) &&
            ktime_to_timespec_cond(shhwtstamps->hwtstamp, tss.ts + 2))
                empty = 0;
        if (!empty)