[AFS]: Add support for the CB.GetCapabilities operation.

[firefly-linux-kernel-4.4.55.git] / fs / afs / main.c

diff --git a/fs/afs/main.c b/fs/afs/main.c
index 0cf1b021ad543238fd8787fdf826d81b25d87630..40c2704e7557c4093b07df5130d9dbe851aa38ed 100644 (file)
--- a/fs/afs/main.c
+++ b/fs/afs/main.c
@@ -40,6 +40,51 @@ struct cachefs_netfs afs_cache_netfs = {
 };
 #endif
 
+struct afs_uuid afs_uuid;
+
+/*
+ * get a client UUID
+ */
+static int __init afs_get_client_UUID(void)
+{
+       struct timespec ts;
+       u64 uuidtime;
+       u16 clockseq;
+       int ret;
+
+       /* read the MAC address of one of the external interfaces and construct
+        * a UUID from it */
+       ret = afs_get_MAC_address(afs_uuid.node);
+       if (ret < 0)
+               return ret;
+
+       getnstimeofday(&ts);
+       uuidtime = (u64) ts.tv_sec * 1000 * 1000 * 10;
+       uuidtime += ts.tv_nsec / 100;
+       uuidtime += AFS_UUID_TO_UNIX_TIME;
+       afs_uuid.time_low = uuidtime;
+       afs_uuid.time_mid = uuidtime >> 32;
+       afs_uuid.time_hi_and_version = (uuidtime >> 48) & AFS_UUID_TIMEHI_MASK;
+       afs_uuid.time_hi_and_version = AFS_UUID_VERSION_TIME;
+
+       get_random_bytes(&clockseq, 2);
+       afs_uuid.clock_seq_low = clockseq;
+       afs_uuid.clock_seq_hi_and_reserved =
+               (clockseq >> 8) & AFS_UUID_CLOCKHI_MASK;
+       afs_uuid.clock_seq_hi_and_reserved = AFS_UUID_VARIANT_STD;
+
+       _debug("AFS UUID: %08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x",
+              afs_uuid.time_low,
+              afs_uuid.time_mid,
+              afs_uuid.time_hi_and_version,
+              afs_uuid.clock_seq_hi_and_reserved,
+              afs_uuid.clock_seq_low,
+              afs_uuid.node[0], afs_uuid.node[1], afs_uuid.node[2],
+              afs_uuid.node[3], afs_uuid.node[4], afs_uuid.node[5]);
+
+       return 0;
+}
+
 /*
  * initialise the AFS client FS module
  */
@@ -49,6 +94,10 @@ static int __init afs_init(void)
 
        printk(KERN_INFO "kAFS: Red Hat AFS client v0.1 registering.\n");
 
+       ret = afs_get_client_UUID();
+       if (ret < 0)
+               return ret;
+
        /* register the /proc stuff */
        ret = afs_proc_init();
        if (ret < 0)