Add rudamentary support for UFS to probe whether a block device supports the

BIO_SPEEDUP command.  Add complimentary support to the CAM periphs that
support it.  This is a redo of r357710.

sys/cam/ata/ata_da.c

@@ -50,6 +50,7 @@ __FBSDID("$FreeBSD$");
 #include <sys/proc.h>
 #include <sys/reboot.h>
 #include <sys/sbuf.h>
+#include <geom/geom.h>
 #include <geom/geom_disk.h>
 #endif /* _KERNEL */
 
@@ -878,6 +879,7 @@ static int ada_spindown_shutdown = ADA_DEFAULT_SPINDOWN_SHUTDOWN;
 static int ada_spindown_suspend = ADA_DEFAULT_SPINDOWN_SUSPEND;
 static int ada_read_ahead = ADA_DEFAULT_READ_AHEAD;
 static int ada_write_cache = ADA_DEFAULT_WRITE_CACHE;
+static int ada_enable_biospeedup = 1;
 
 static SYSCTL_NODE(_kern_cam, OID_AUTO, ada, CTLFLAG_RD, 0,
             "CAM Direct Access Disk driver");
@@ -895,6 +897,8 @@ SYSCTL_INT(_kern_cam_ada, OID_AUTO, read_ahead, CTLFLAG_RWTUN,
            &ada_read_ahead, 0, "Enable disk read-ahead");
 SYSCTL_INT(_kern_cam_ada, OID_AUTO, write_cache, CTLFLAG_RWTUN,
            &ada_write_cache, 0, "Enable disk write cache");
+SYSCTL_INT(_kern_cam_ada, OID_AUTO, enable_biospeedup, CTLFLAG_RDTUN,
+	   &ada_enable_biospeedup, 0, "Enable BIO_SPEEDUP processing");
 
 /*
  * ADA_ORDEREDTAG_INTERVAL determines how often, relative
@@ -1566,6 +1570,9 @@ adagetattr(struct bio *bp)
 	int ret;
 	struct cam_periph *periph;
 
+	if (g_handleattr_int(bp, "GEOM::canspeedup", ada_enable_biospeedup))
+		return (EJUSTRETURN);
+
 	periph = (struct cam_periph *)bp->bio_disk->d_drv1;
 	cam_periph_lock(periph);
 	ret = xpt_getattr(bp->bio_data, bp->bio_length, bp->bio_attribute,

sys/cam/nvme/nvme_da.c

@@ -48,6 +48,7 @@ __FBSDID("$FreeBSD$");
 #include <sys/cons.h>
 #include <sys/proc.h>
 #include <sys/reboot.h>
+#include <geom/geom.h>
 #include <geom/geom_disk.h>
 #endif /* _KERNEL */
 
@@ -174,9 +175,12 @@ static SYSCTL_NODE(_kern_cam, OID_AUTO, nda, CTLFLAG_RD, 0,
 static int nda_send_ordered = NDA_DEFAULT_SEND_ORDERED;
 static int nda_default_timeout = NDA_DEFAULT_TIMEOUT;
 static int nda_max_trim_entries = NDA_MAX_TRIM_ENTRIES;
+static int nda_enable_biospeedup = 1;
 SYSCTL_INT(_kern_cam_nda, OID_AUTO, max_trim, CTLFLAG_RDTUN,
     &nda_max_trim_entries, NDA_MAX_TRIM_ENTRIES,
     "Maximum number of BIO_DELETE to send down as a DSM TRIM.");
+SYSCTL_INT(_kern_cam_nda, OID_AUTO, enable_biospeedup, CTLFLAG_RDTUN,
+    &nda_enable_biospeedup, 0, "Enable BIO_SPEEDUP processing");
 
 /*
  * All NVMe media is non-rotational, so all nvme device instances
@@ -700,6 +704,9 @@ ndagetattr(struct bio *bp)
 	int ret;
 	struct cam_periph *periph;
 
+	if (g_handleattr_int(bp, "GEOM::canspeedup", nda_enable_biospeedup))
+		return (EJUSTRETURN);
+
 	periph = (struct cam_periph *)bp->bio_disk->d_drv1;
 	cam_periph_lock(periph);
 	ret = xpt_getattr(bp->bio_data, bp->bio_length, bp->bio_attribute,

sys/cam/scsi/scsi_da.c

@@ -1547,6 +1547,7 @@ static int da_default_timeout = DA_DEFAULT_TIMEOUT;
 static sbintime_t da_default_softtimeout = DA_DEFAULT_SOFTTIMEOUT;
 static int da_send_ordered = DA_DEFAULT_SEND_ORDERED;
 static int da_disable_wp_detection = 0;
+static int da_enable_biospeedup = 1;
 
 static SYSCTL_NODE(_kern_cam, OID_AUTO, da, CTLFLAG_RD, 0,
             "CAM Direct Access Disk driver");
@@ -1561,6 +1562,8 @@ SYSCTL_INT(_kern_cam_da, OID_AUTO, send_ordered, CTLFLAG_RWTUN,
 SYSCTL_INT(_kern_cam_da, OID_AUTO, disable_wp_detection, CTLFLAG_RWTUN,
            &da_disable_wp_detection, 0,
 	   "Disable detection of write-protected disks");
+SYSCTL_INT(_kern_cam_da, OID_AUTO, enable_biospeedup, CTLFLAG_RDTUN,
+	    &da_enable_biospeedup, 0, "Enable BIO_SPEEDUP processing");
 
 SYSCTL_PROC(_kern_cam_da, OID_AUTO, default_softtimeout,
     CTLTYPE_UINT | CTLFLAG_RW, NULL, 0, dasysctlsofttimeout, "I",
@@ -1967,6 +1970,9 @@ dagetattr(struct bio *bp)
 	int ret;
 	struct cam_periph *periph;
 
+	if (g_handleattr_int(bp, "GEOM::canspeedup", da_enable_biospeedup))
+		return (EJUSTRETURN);
+
 	periph = (struct cam_periph *)bp->bio_disk->d_drv1;
 	cam_periph_lock(periph);
 	ret = xpt_getattr(bp->bio_data, bp->bio_length, bp->bio_attribute,

sys/ufs/ffs/ffs_softdep.c

@@ -1464,6 +1464,9 @@ softdep_send_speedup(struct ufsmount *ump, size_t shortage, u_int flags)
 {
 	struct buf *bp;
 
+	if ((ump->um_flags & UM_CANSPEEDUP) == 0)
+		return;
+
 	bp = malloc(sizeof(*bp), M_TRIM, M_WAITOK | M_ZERO);
 	bp->b_iocmd = BIO_SPEEDUP;
 	bp->b_ioflags = flags;

sys/ufs/ffs/ffs_vfsops.c

@@ -794,7 +794,7 @@ ffs_mountfs(devvp, mp, td)
 	struct ucred *cred;
 	struct g_consumer *cp;
 	struct mount *nmp;
-	int candelete;
+	int candelete, canspeedup;
 	off_t loc;
 
 	fs = NULL;
@@ -1011,6 +1011,12 @@ ffs_mountfs(devvp, mp, td)
 		}
 	}
 
+	len = sizeof(int);
+	if (g_io_getattr("GEOM::canspeedup", cp, &len, &canspeedup) == 0) {
+		if (canspeedup)
+			ump->um_flags |= UM_CANSPEEDUP;
+	}
+
 	ump->um_mountp = mp;
 	ump->um_dev = dev;
 	ump->um_devvp = devvp;

sys/ufs/ufs/ufsmount.h

@@ -131,6 +131,7 @@ struct ufsmount {
  */
 #define UM_CANDELETE		0x00000001	/* devvp supports TRIM */
 #define UM_WRITESUSPENDED	0x00000002	/* suspension in progress */
+#define UM_CANSPEEDUP		0x00000004	/* devvp supports SPEEDUP */
 
 /*
  * function prototypes