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Add code to repsect the D_NOGIANT flag, should the disk device driver set it.

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NO_GEOM cleanup:        remove ifdefs.

Still untested.
This commit is contained in:
Poul-Henning Kamp 2003-01-29 19:47:25 +00:00
parent 56ec17ab0c
commit 5a67919a5e
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=110052
1 changed files with 30 additions and 11 deletions
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41
sys/geom/geom_disk.c
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@ -36,7 +36,6 @@
*/
#include "opt_geom.h"
#ifndef NO_GEOM
#include <sys/param.h>
#include <sys/systm.h>
@ -67,6 +66,20 @@ struct g_class g_disk_class = {
DECLARE_GEOM_CLASS(g_disk_class, g_disk);
static void __inline
g_disk_lock_giant(struct disk *dp)
{
if (!(dp->d_devsw->d_flags & D_NOGIANT))
mtx_lock(&Giant);
}
static void __inline
g_disk_unlock_giant(struct disk *dp)
{
if (!(dp->d_devsw->d_flags & D_NOGIANT))
mtx_unlock(&Giant);
}
static int
g_disk_access(struct g_provider *pp, int r, int w, int e)
{
@ -83,19 +96,19 @@ g_disk_access(struct g_provider *pp, int r, int w, int e)
dp = pp->geom->softc;
dev = dp->d_dev;
if ((pp->acr + pp->acw + pp->ace) == 0 && (r + w + e) > 0) {
mtx_lock(&Giant);
g_disk_lock_giant(dp);
error = devsw(dev)->d_open(dev, 3, 0, NULL);
if (error != 0)
printf("Opened disk %s -> %d\n", pp->name, error);
mtx_unlock(&Giant);
g_disk_unlock_giant(dp);
pp->mediasize = dp->d_mediasize;
pp->sectorsize = dp->d_sectorsize;
} else if ((pp->acr + pp->acw + pp->ace) > 0 && (r + w + e) == 0) {
mtx_lock(&Giant);
g_disk_lock_giant(dp);
error = devsw(dev)->d_close(dev, 3, 0, NULL);
if (error != 0)
printf("Closed disk %s -> %d\n", pp->name, error);
mtx_unlock(&Giant);
g_disk_unlock_giant(dp);
} else {
error = 0;
}
@ -126,11 +139,17 @@ g_disk_kerneldump(struct bio *bp, struct disk *dp)
static void
g_disk_done(struct bio *bp)
{
struct disk *dp;
mtx_unlock(&Giant);
dp = bp->bio_caller1;
bp->bio_completed = bp->bio_length - bp->bio_resid;
g_std_done(bp);
mtx_lock(&Giant);
if (!(dp->d_devsw->d_flags & D_NOGIANT)) {
DROP_GIANT();
g_std_done(bp);
PICKUP_GIANT();
} else {
g_std_done(bp);
}
}
static void
@ -160,9 +179,10 @@ g_disk_start(struct bio *bp)
bp2->bio_pblkno = bp2->bio_offset / dp->d_sectorsize;
bp2->bio_bcount = bp2->bio_length;
bp2->bio_dev = dev;
mtx_lock(&Giant);
bp2->bio_caller1 = dp;
g_disk_lock_giant(dp);
devsw(dev)->d_strategy(bp2);
mtx_unlock(&Giant);
g_disk_unlock_giant(dp);
break;
case BIO_GETATTR:
if (g_handleattr_int(bp, "GEOM::fwsectors", dp->d_fwsectors))
@ -317,4 +337,3 @@ sysctl_disks(SYSCTL_HANDLER_ARGS)
SYSCTL_PROC(_kern, OID_AUTO, disks, CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_NOLOCK, 0, 0,
sysctl_disks, "A", "names of available disks");
#endif