[src/trunk]: src/sys/dev/raidframe add support for DIOCGCACHE; contrary to DI...

[jdolecek <jdolecek%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/a2d81daee008
branches:  trunk
changeset: 352501:a2d81daee008
user:      jdolecek <jdolecek%NetBSD.org@localhost>
date:      Wed Apr 05 19:40:26 2017 +0000

description:
add support for DIOCGCACHE; contrary to DIOCCACHESYNC, query any non-dead
disk in the set, even currently reconstring one

diffstat:

 sys/dev/raidframe/rf_netbsdkintf.c |  53 ++++++++++++++++++++++++++++++++++++-
 1 files changed, 51 insertions(+), 2 deletions(-)

diffs (88 lines):

diff -r 4983d9cc8d91 -r a2d81daee008 sys/dev/raidframe/rf_netbsdkintf.c
--- a/sys/dev/raidframe/rf_netbsdkintf.c        Wed Apr 05 18:34:56 2017 +0000
+++ b/sys/dev/raidframe/rf_netbsdkintf.c        Wed Apr 05 19:40:26 2017 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: rf_netbsdkintf.c,v 1.347 2016/09/19 23:37:10 jdolecek Exp $    */
+/*     $NetBSD: rf_netbsdkintf.c,v 1.348 2017/04/05 19:40:26 jdolecek Exp $    */
 
 /*-
  * Copyright (c) 1996, 1997, 1998, 2008-2011 The NetBSD Foundation, Inc.
@@ -101,7 +101,7 @@
  ***********************************************************/
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: rf_netbsdkintf.c,v 1.347 2016/09/19 23:37:10 jdolecek Exp $");
+__KERNEL_RCSID(0, "$NetBSD: rf_netbsdkintf.c,v 1.348 2017/04/05 19:40:26 jdolecek Exp $");
 
 #ifdef _KERNEL_OPT
 #include "opt_compat_netbsd.h"
@@ -188,6 +188,7 @@
 struct raid_softc;
 static void raidinit(struct raid_softc *);
 static int raiddoaccess(RF_Raid_t *raidPtr, struct buf *bp);
+static int rf_get_component_caches(RF_Raid_t *raidPtr, int *);
 
 static int raid_match(device_t, cfdata_t, void *);
 static void raid_attach(device_t, device_t, void *);
@@ -1787,6 +1788,10 @@
         */
        
        switch (cmd) {
+       case DIOCGCACHE:
+               retcode = rf_get_component_caches(raidPtr, (int *)data);
+               break;
+
        case DIOCCACHESYNC:
                retcode = rf_sync_component_caches(raidPtr);
                break;
@@ -3679,6 +3684,50 @@
        disk_set_info(dksc->sc_dev, &dksc->sc_dkdev, NULL);
 }
 
+/*
+ * Get cache info for all the components (including spares).
+ * Returns intersection of all the cache flags of all disks, or first
+ * error if any encountered.
+ * XXXfua feature flags can change as spares are added - lock down somehow
+ */
+static int
+rf_get_component_caches(RF_Raid_t *raidPtr, int *data)
+{
+       int c;
+       int error;
+       int dkwhole = 0, dkpart;
+       
+       for (c = 0; c < raidPtr->numCol + raidPtr->numSpare; c++) {
+               /*
+                * Check any non-dead disk, even when currently being
+                * reconstructed.
+                */
+               if (!RF_DEAD_DISK(raidPtr->Disks[c].status)
+                   || raidPtr->Disks[c].status == rf_ds_reconstructing) {
+                       error = VOP_IOCTL(raidPtr->raid_cinfo[c].ci_vp,
+                           DIOCGCACHE, &dkpart, FREAD, NOCRED);
+                       if (error) {
+                               if (error != ENODEV) {
+                                       printf("raid%d: get cache for component %s failed\n",
+                                           raidPtr->raidid,
+                                           raidPtr->Disks[c].devname);
+                               }
+
+                               return error;
+                       }
+
+                       if (c == 0)
+                               dkwhole = dkpart;
+                       else
+                               dkwhole = DKCACHE_COMBINE(dkwhole, dkpart);
+               }
+       }
+
+       *data = (dkwhole >= 0) ? dkwhole : 0;
+
+       return 0;
+}
+
 /* 
  * Implement forwarding of the DIOCCACHESYNC ioctl to each of the components.
  * We end up returning whatever error was returned by the first cache flush