[src/trunk]: src/sys/dev/scsipi Implement DIOC[GS]STRATEGY for sd(4).

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

details:   https://anonhg.NetBSD.org/src/rev/171ff432c8a8
branches:  trunk
changeset: 753975:171ff432c8a8
user:      jakllsch <jakllsch%NetBSD.org@localhost>
date:      Wed Apr 14 22:26:33 2010 +0000

description:
Implement DIOC[GS]STRATEGY for sd(4).

diffstat:

 sys/dev/scsipi/sd.c |  49 +++++++++++++++++++++++++++++++++++++++++++++++--
 1 files changed, 47 insertions(+), 2 deletions(-)

diffs (84 lines):

diff -r 4b6c453c0110 -r 171ff432c8a8 sys/dev/scsipi/sd.c
--- a/sys/dev/scsipi/sd.c       Wed Apr 14 20:30:28 2010 +0000
+++ b/sys/dev/scsipi/sd.c       Wed Apr 14 22:26:33 2010 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: sd.c,v 1.292 2010/02/24 22:38:08 dyoung Exp $  */
+/*     $NetBSD: sd.c,v 1.293 2010/04/14 22:26:33 jakllsch Exp $        */
 
 /*-
  * Copyright (c) 1998, 2003, 2004 The NetBSD Foundation, Inc.
@@ -47,7 +47,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: sd.c,v 1.292 2010/02/24 22:38:08 dyoung Exp $");
+__KERNEL_RCSID(0, "$NetBSD: sd.c,v 1.293 2010/04/14 22:26:33 jakllsch Exp $");
 
 #include "opt_scsi.h"
 #include "rnd.h"
@@ -994,6 +994,7 @@
        struct scsipi_periph *periph = sd->sc_periph;
        int part = SDPART(dev);
        int error = 0;
+       int s;
 #ifdef __HAVE_OLD_DISKLABEL
        struct disklabel *newlabel = NULL;
 #endif
@@ -1013,6 +1014,8 @@
                case ODIOCEJECT:
                case DIOCGCACHE:
                case DIOCSCACHE:
+               case DIOCGSTRATEGY:
+               case DIOCSSTRATEGY:
                case SCIOCIDENTIFY:
                case OSCIOCIDENTIFY:
                case SCIOCCOMMAND:
@@ -1231,6 +1234,48 @@
                return (dkwedge_list(&sd->sc_dk, dkwl, l));
            }
 
+       case DIOCGSTRATEGY:
+           {
+               struct disk_strategy *dks = addr;
+
+               s = splbio();
+               strlcpy(dks->dks_name, bufq_getstrategyname(sd->buf_queue),
+                   sizeof(dks->dks_name));
+               splx(s);
+               dks->dks_paramlen = 0;
+
+               return 0;
+           }
+
+       case DIOCSSTRATEGY:
+           {
+               struct disk_strategy *dks = addr;
+               struct bufq_state *new;
+               struct bufq_state *old;
+
+               if ((flag & FWRITE) == 0) {
+                       return EBADF;
+               }
+
+               if (dks->dks_param != NULL) {
+                       return EINVAL;
+               }
+               dks->dks_name[sizeof(dks->dks_name) - 1] = 0; /* ensure term */
+               error = bufq_alloc(&new, dks->dks_name,
+                   BUFQ_EXACT|BUFQ_SORT_RAWBLOCK);
+               if (error) {
+                       return error;
+               }
+               s = splbio();
+               old = sd->buf_queue;
+               bufq_move(new, old);
+               sd->buf_queue = new;
+               splx(s);
+               bufq_free(old);
+               
+               return 0;
+           }
+
        default:
                if (part != RAW_PART)
                        return (ENOTTY);