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-rw-r--r--fs/afs/cmservice.c98
1 files changed, 98 insertions, 0 deletions
diff --git a/fs/afs/cmservice.c b/fs/afs/cmservice.c
index c3ec57a237bf..a6af3acf016e 100644
--- a/fs/afs/cmservice.c
+++ b/fs/afs/cmservice.c
@@ -22,6 +22,8 @@ static int afs_deliver_cb_init_call_back_state(struct afs_call *,
struct sk_buff *, bool);
static int afs_deliver_cb_probe(struct afs_call *, struct sk_buff *, bool);
static int afs_deliver_cb_callback(struct afs_call *, struct sk_buff *, bool);
+static int afs_deliver_cb_get_capabilities(struct afs_call *, struct sk_buff *,
+ bool);
static void afs_cm_destructor(struct afs_call *);
/*
@@ -55,6 +57,16 @@ static const struct afs_call_type afs_SRXCBProbe = {
};
/*
+ * CB.GetCapabilities operation type
+ */
+static const struct afs_call_type afs_SRXCBGetCapabilites = {
+ .name = "CB.GetCapabilities",
+ .deliver = afs_deliver_cb_get_capabilities,
+ .abort_to_error = afs_abort_to_error,
+ .destructor = afs_cm_destructor,
+};
+
+/*
* route an incoming cache manager call
* - return T if supported, F if not
*/
@@ -74,6 +86,9 @@ bool afs_cm_incoming_call(struct afs_call *call)
case CBProbe:
call->type = &afs_SRXCBProbe;
return true;
+ case CBGetCapabilities:
+ call->type = &afs_SRXCBGetCapabilites;
+ return true;
default:
return false;
}
@@ -328,3 +343,86 @@ static int afs_deliver_cb_probe(struct afs_call *call, struct sk_buff *skb,
schedule_work(&call->work);
return 0;
}
+
+/*
+ * allow the fileserver to ask about the cache manager's capabilities
+ */
+static void SRXAFSCB_GetCapabilities(struct work_struct *work)
+{
+ struct afs_interface *ifs;
+ struct afs_call *call = container_of(work, struct afs_call, work);
+ int loop, nifs;
+
+ struct {
+ struct /* InterfaceAddr */ {
+ __be32 nifs;
+ __be32 uuid[11];
+ __be32 ifaddr[32];
+ __be32 netmask[32];
+ __be32 mtu[32];
+ } ia;
+ struct /* Capabilities */ {
+ __be32 capcount;
+ __be32 caps[1];
+ } cap;
+ } reply;
+
+ _enter("");
+
+ nifs = 0;
+ ifs = kcalloc(32, sizeof(*ifs), GFP_KERNEL);
+ if (ifs) {
+ nifs = afs_get_ipv4_interfaces(ifs, 32, false);
+ if (nifs < 0) {
+ kfree(ifs);
+ ifs = NULL;
+ nifs = 0;
+ }
+ }
+
+ memset(&reply, 0, sizeof(reply));
+ reply.ia.nifs = htonl(nifs);
+
+ reply.ia.uuid[0] = htonl(afs_uuid.time_low);
+ reply.ia.uuid[1] = htonl(afs_uuid.time_mid);
+ reply.ia.uuid[2] = htonl(afs_uuid.time_hi_and_version);
+ reply.ia.uuid[3] = htonl((s8) afs_uuid.clock_seq_hi_and_reserved);
+ reply.ia.uuid[4] = htonl((s8) afs_uuid.clock_seq_low);
+ for (loop = 0; loop < 6; loop++)
+ reply.ia.uuid[loop + 5] = htonl((s8) afs_uuid.node[loop]);
+
+ if (ifs) {
+ for (loop = 0; loop < nifs; loop++) {
+ reply.ia.ifaddr[loop] = ifs[loop].address.s_addr;
+ reply.ia.netmask[loop] = ifs[loop].netmask.s_addr;
+ reply.ia.mtu[loop] = htonl(ifs[loop].mtu);
+ }
+ }
+
+ reply.cap.capcount = htonl(1);
+ reply.cap.caps[0] = htonl(AFS_CAP_ERROR_TRANSLATION);
+ afs_send_simple_reply(call, &reply, sizeof(reply));
+
+ _leave("");
+}
+
+/*
+ * deliver request data to a CB.GetCapabilities call
+ */
+static int afs_deliver_cb_get_capabilities(struct afs_call *call,
+ struct sk_buff *skb, bool last)
+{
+ _enter(",{%u},%d", skb->len, last);
+
+ if (skb->len > 0)
+ return -EBADMSG;
+ if (!last)
+ return 0;
+
+ /* no unmarshalling required */
+ call->state = AFS_CALL_REPLYING;
+
+ INIT_WORK(&call->work, SRXAFSCB_GetCapabilities);
+ schedule_work(&call->work);
+ return 0;
+}