Revert c6537d6742985da1fbf12ae26cde6a096fd35b5c

Backout the tipc changes to the flags int he subscription message.  These
changees, while reasonable on the surface, interefere with user space ABI
compatibility which is a no-no.  This was part of the changes to fix the
endianess issues in the TIPC protocol, which would be really nice to do but we
need to do so in a way that is backwards compatible with user space.

Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 23 insertions, 22 deletions

diff --git a/include/linux/tipc.h b/include/linux/tipc.h
index 181c8d0e6f73..d10614b29d59 100644
--- a/include/linux/tipc.h
+++ b/include/linux/tipc.h
@@ -127,17 +127,23 @@ static inline unsigned int tipc_node(__u32 addr)
  * TIPC topology subscription service definitions
  */
 
-#define TIPC_SUB_SERVICE        0x00    /* Filter for service availability    */
-#define TIPC_SUB_PORTS          0x01    /* Filter for port availability  */
-#define TIPC_SUB_CANCEL         0x04    /* Cancel a subscription         */
+#define TIPC_SUB_PORTS          0x01    /* filter for port availability */
+#define TIPC_SUB_SERVICE        0x02    /* filter for service availability */
+#define TIPC_SUB_CANCEL         0x04    /* cancel a subscription */
+#if 0
+/* The following filter options are not currently implemented */
+#define TIPC_SUB_NO_BIND_EVTS   0x04    /* filter out "publish" events */
+#define TIPC_SUB_NO_UNBIND_EVTS 0x08    /* filter out "withdraw" events */
+#define TIPC_SUB_SINGLE_EVT     0x10    /* expire after first event */
+#endif
 
 #define TIPC_WAIT_FOREVER       ~0      /* timeout for permanent subscription */
 
 struct tipc_subscr {
-        struct tipc_name_seq seq;       /* NBO. Name sequence of interest */
-        __u32 timeout;                  /* NBO. Subscription duration (in ms) */
-        __u32 filter;                   /* NBO. Bitmask of filter options */
-        char usr_handle[8];             /* Opaque. Available for subscriber use */
+        struct tipc_name_seq seq;       /* name sequence of interest */
+        __u32 timeout;                  /* subscription duration (in ms) */
+        __u32 filter;                   /* bitmask of filter options */
+        char usr_handle[8];             /* available for subscriber use */
 };
 
 #define TIPC_PUBLISHED          1       /* publication event */
@@ -145,11 +151,11 @@ struct tipc_subscr {
 #define TIPC_SUBSCR_TIMEOUT     3       /* subscription timeout event */
 
 struct tipc_event {
-        __u32 event;                    /* NBO. Event type, as defined above */
-        __u32 found_lower;              /* NBO. Matching name seq instances  */
-        __u32 found_upper;              /*  "      "       "   "    "        */
-        struct tipc_portid port;        /* NBO. Associated port              */
-        struct tipc_subscr s;           /* Original, associated subscription */
+        __u32 event;                    /* event type */
+        __u32 found_lower;              /* matching name seq instances */
+        __u32 found_upper;              /*    "      "    "     "      */
+        struct tipc_portid port;        /* associated port */
+        struct tipc_subscr s;           /* associated subscription */
 };
 
 /*
diff --git a/net/tipc/subscr.c b/net/tipc/subscr.c
index ab6eab4c45e2..ff123e56114a 100644
--- a/net/tipc/subscr.c
+++ b/net/tipc/subscr.c
@@ -274,7 +274,7 @@ static void subscr_cancel(struct tipc_subscr *s,
 {
         struct subscription *sub;
         struct subscription *sub_temp;
-        __u32 type, lower, upper, timeout, filter;
+        __u32 type, lower, upper;
         int found = 0;
 
         /* Find first matching subscription, exit if not found */
@@ -282,18 +282,12 @@ static void subscr_cancel(struct tipc_subscr *s,
         type = ntohl(s->seq.type);
         lower = ntohl(s->seq.lower);
         upper = ntohl(s->seq.upper);
-        timeout = ntohl(s->timeout);
-        filter = ntohl(s->filter) & ~TIPC_SUB_CANCEL;
 
         list_for_each_entry_safe(sub, sub_temp, &subscriber->subscription_list,
                                  subscription_list) {
                         if ((type == sub->seq.type) &&
                             (lower == sub->seq.lower) &&
-                            (upper == sub->seq.upper) &&
-                            (timeout == sub->timeout) &&
-                            (filter == sub->filter) &&
-                             !memcmp(s->usr_handle,sub->evt.s.usr_handle,
-                                     sizeof(s->usr_handle)) ){
+                            (upper == sub->seq.upper)) {
                                 found = 1;
                                 break;
                         }
@@ -310,7 +304,7 @@ static void subscr_cancel(struct tipc_subscr *s,
                 k_term_timer(&sub->timer);
                 spin_lock_bh(subscriber->lock);
         }
-        dbg("Cancel: removing sub %u,%u,%u from subscriber %p list\n",
+        dbg("Cancel: removing sub %u,%u,%u from subscriber %x list\n",
             sub->seq.type, sub->seq.lower, sub->seq.upper, subscriber);
         subscr_del(sub);
 }
@@ -358,7 +352,8 @@ static struct subscription *subscr_subscribe(struct tipc_subscr *s,
         sub->seq.upper = ntohl(s->seq.upper);
         sub->timeout = ntohl(s->timeout);
         sub->filter = ntohl(s->filter);
-        if ((sub->filter && (sub->filter != TIPC_SUB_PORTS)) ||
+        if ((!(sub->filter & TIPC_SUB_PORTS) ==
+             !(sub->filter & TIPC_SUB_SERVICE)) ||
             (sub->seq.lower > sub->seq.upper)) {
                 warn("Subscription rejected, illegal request\n");
                 kfree(sub);