DEVEL15-newuuid-20070612

add the newuuid command


(cherry picked from commit b1bbe33fde)

src/afs/afs_pioctl.c

@@ -91,6 +91,7 @@ DECL_PIOCTL(PPrefetchFromTape);
 DECL_PIOCTL(PResidencyCmd);
 DECL_PIOCTL(PCallBackAddr);
 DECL_PIOCTL(PNFSNukeCreds);
+DECL_PIOCTL(PNewUuid);
 
 /*
  * A macro that says whether we're going to need HandleClientContext().
@@ -193,6 +194,12 @@ static int (*(CpioctlSw[])) () = {
 	PNewAlias,		/* 1 -- create new cell alias */
 	PListAliases,		/* 2 -- list cell aliases */
 	PCallBackAddr,		/* 3 -- request addr for callback rxcon */
+    PBogus,			/* 4 */
+    PBogus,			/* 5 */
+    PBogus,			/* 6 */
+    PBogus,			/* 7 */
+    PBogus,			/* 8 */
+    PNewUUID,                   /* 9 */ 
 };
 
 static int (*(OpioctlSw[])) () = {
@@ -3809,6 +3816,21 @@ DECL_PIOCTL(PResidencyCmd)
     return code;
 }
 
+DECL_PIOCTL(PNewUuid)
+{
+    /*AFS_STATCNT(PNewUuid); */
+    if (!afs_resourceinit_flag)	/* afs deamons havn't started yet */
+	return EIO;		/* Inappropriate ioctl for device */
+
+    if (!afs_osi_suser(acred))
+	return EACCES;
+
+    ObtainWriteLock(&afs_xinterface, 555);
+    afs_uuid_create(&afs_cb_interface.uuid);
+    ReleaseWriteLock(&afs_xinterface);
+    ForceAllNewConnections();
+}
+
 DECL_PIOCTL(PCallBackAddr)
 {
 #ifndef UKERNEL

src/afs/afs_server.c

@@ -488,6 +488,42 @@ afs_CountServers(void)
 }				/*afs_CountServers */
 
 
+void
+ForceAllNewConnections()
+{
+    int srvAddrCount;
+    struct srvAddr **addrs;
+    struct srvAddr *sa;
+    afs_int32 i, j;
+
+    ObtainReadLock(&afs_xserver);	/* Necessary? */
+    ObtainReadLock(&afs_xsrvAddr);
+
+    srvAddrCount = 0;
+    for (i = 0; i < NSERVERS; i++) {
+	for (sa = afs_srvAddrs[i]; sa; sa = sa->next_bkt) {
+	    srvAddrCount++;
+	}
+    }
+
+    addrs = afs_osi_Alloc(srvAddrCount * sizeof(*addrs));
+    j = 0;
+    for (i = 0; i < NSERVERS; i++) {
+	for (sa = afs_srvAddrs[i]; sa; sa = sa->next_bkt) {
+	    if (j >= srvAddrCount)
+		break;
+	    addrs[j++] = sa;
+	}
+    }
+
+    ReleaseReadLock(&afs_xsrvAddr);
+    ReleaseReadLock(&afs_xserver);
+    for (i = 0; i < j; i++) {
+        sa = addrs[i];
+	ForceNewConnections(sa);
+    }
+}
+
 /* check down servers (if adown), or running servers (if !adown) */
 void
 afs_CheckServers(int adown, struct cell *acellp)

src/config/venus.h

@@ -182,6 +182,7 @@ struct cm_initparams {
 #define VIOC_GETALIAS		_CVICEIOCTL(2)	/* get alias info */
 #define VIOC_CBADDR		_CVICEIOCTL(3)	/* push callback addr */
 #define VIOC_DISCON		_CVICEIOCTL(5)	/* set/get discon mode */
+#define VIOC_NEWUUID            _CVICEIOCTL(9)  /* new uuid */
 
 /* OpenAFS-specific 'O' pioctl's */
 #define VIOC_NFS_NUKE_CREDS	_OVICEIOCTL(1)	/* nuke creds for all PAG's */

src/venus/fs.c

@@ -69,7 +69,7 @@ static char tspace[1024];
 static struct ubik_client *uclient;
 
 static int GetClientAddrsCmd(), SetClientAddrsCmd(), FlushMountCmd();
-static int RxStatProcCmd(), RxStatPeerCmd(), GetFidCmd();
+static int RxStatProcCmd(), RxStatPeerCmd(), GetFidCmd(), NewUuidCmd();
 
 extern char *hostutil_GetNameByINet();
 extern struct hostent *hostutil_GetHostByName();
@@ -1244,6 +1244,24 @@ FlushVolumeCmd(struct cmd_syndesc *as, char *arock)
     return error;
 }
 
+static int
+NewUuidCmd(struct cmd_syndesc *as, char *arock)
+{
+    afs_int32 code;
+    struct ViceIoctl blob;
+
+    blob.in_size = 0;
+    blob.out_size = 0;
+    code = pioctl(0, VIOC_NEWUUID, &blob, 1);
+    if (code) {
+	Die(errno, 0);
+	return 1;
+    }
+
+    printf("New uuid generated.\n");
+    return 0;
+}
+
 static int
 FlushCmd(struct cmd_syndesc *as, char *arock)
 {
@@ -3620,6 +3638,9 @@ defect 3069
     ts = cmd_CreateSyntax("nukenfscreds", NukeNFSCredsCmd, 0, "nuke credentials for NFS client");
     cmd_AddParm(ts, "-addr", CMD_SINGLE, 0, "host name or address");
 
+    ts = cmd_CreateSyntax("newuuid", NewUuidCmd, 0,
+			  "force a new uuid");
+
     code = cmd_Dispatch(argc, argv);
     if (rxInitDone)
 	rx_Finalize();