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Fix the "almost clone" semantics.

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This commit is contained in:
Poul-Henning Kamp 2000-07-04 10:06:34 +00:00
parent 2ae7523515
commit 0cfaeeee87
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=62572
1 changed files with 11 additions and 6 deletions
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17
sys/dev/md/md.c
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@ -52,6 +52,8 @@ static u_char end_mfs_root[] __unused = "MFS Filesystem had better STOP here";
static int mdrootready;
static void mdcreate_malloc(void);
#define CDEV_MAJOR 95
#define BDEV_MAJOR 22
@ -78,6 +80,8 @@ static struct cdevsw md_cdevsw = {
/* bmaj */ BDEV_MAJOR
};
static struct cdevsw mddisk_cdevsw;
struct md_s {
int unit;
struct devstat stats;
@ -87,7 +91,6 @@ struct md_s {
int busy;
enum {MD_MALLOC, MD_PRELOAD} type;
unsigned nsect;
struct cdevsw devsw;
/* MD_MALLOC related fields */
unsigned nsecp;
@ -111,6 +114,8 @@ mdopen(dev_t dev, int flag, int fmt, struct proc *p)
devtoname(dev), flag, fmt, p);
sc = dev->si_drv1;
if (sc->unit + 1 == mdunits)
mdcreate_malloc();
dl = &sc->disk.d_label;
bzero(dl, sizeof(*dl));
@ -336,7 +341,7 @@ mdstrategy_preload(struct bio *bp)
}
static struct md_s *
mdcreate(struct cdevsw *devsw)
mdcreate(void)
{
struct md_s *sc;
@ -348,7 +353,7 @@ mdcreate(struct cdevsw *devsw)
DEVSTAT_NO_ORDERED_TAGS,
DEVSTAT_TYPE_DIRECT | DEVSTAT_TYPE_IF_OTHER,
DEVSTAT_PRIORITY_OTHER);
sc->dev = disk_create(sc->unit, &sc->disk, 0, devsw, &sc->devsw);
sc->dev = disk_create(sc->unit, &sc->disk, 0, &md_cdevsw, &mddisk_cdevsw);
sc->dev->si_drv1 = sc;
return (sc);
}
@ -358,7 +363,7 @@ mdcreate_preload(u_char *image, unsigned length)
{
struct md_s *sc;
sc = mdcreate(&md_cdevsw);
sc = mdcreate();
sc->type = MD_PRELOAD;
sc->nsect = length / DEV_BSIZE;
sc->pl_ptr = image;
@ -373,13 +378,14 @@ mdcreate_malloc(void)
{
struct md_s *sc;
sc = mdcreate(&md_cdevsw);
sc = mdcreate();
sc->type = MD_MALLOC;
sc->nsect = MDNSECT; /* for now */
MALLOC(sc->secp, u_char **, sizeof(u_char *), M_MD, M_WAITOK);
bzero(sc->secp, sizeof(u_char *));
sc->nsecp = 1;
printf("md%d: Malloc disk\n", sc->unit);
}
static void
@ -412,7 +418,6 @@ md_drvinit(void *unused)
mdunits, name, len, ptr);
mdcreate_preload(ptr, len);
}
printf("md%d: Malloc disk\n", mdunits);
mdcreate_malloc();
}