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author | phk <phk@FreeBSD.org> | 1999-08-08 22:01:50 +0000 |
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committer | phk <phk@FreeBSD.org> | 1999-08-08 22:01:50 +0000 |
commit | 6154e4bd7bf44a1ae3dc72a925e9881cd06ab974 (patch) | |
tree | 7ce2ae6b3e34c20d39a8a38a2154ede0249ad84d /sys/dev | |
parent | 900187496e36526100d5e06b4ff600d52ca7ba9e (diff) | |
download | FreeBSD-src-6154e4bd7bf44a1ae3dc72a925e9881cd06ab974.zip FreeBSD-src-6154e4bd7bf44a1ae3dc72a925e9881cd06ab974.tar.gz |
Remove compiled in limit on number of devices.
Diffstat (limited to 'sys/dev')
-rw-r--r-- | sys/dev/vn/vn.c | 133 |
1 files changed, 29 insertions, 104 deletions
diff --git a/sys/dev/vn/vn.c b/sys/dev/vn/vn.c index 9087d25..b45985e 100644 --- a/sys/dev/vn/vn.c +++ b/sys/dev/vn/vn.c @@ -38,7 +38,7 @@ * from: Utah Hdr: vn.c 1.13 94/04/02 * * from: @(#)vn.c 8.6 (Berkeley) 4/1/94 - * $Id: vn.c,v 1.81 1999/07/20 09:47:33 phk Exp $ + * $Id: vn.c,v 1.82 1999/08/08 18:42:42 phk Exp $ */ /* @@ -60,15 +60,6 @@ * NOTE 3: Doesn't interact with leases, should it? */ #include "vn.h" -#if NVN > 0 - -/* default is to have 8 VN's */ -#if NVN < 8 -#undef NVN -#define NVN 8 -#endif - -#include "opt_devfs.h" #include <sys/param.h> #include <sys/systm.h> @@ -86,9 +77,6 @@ #include <sys/stat.h> #include <sys/conf.h> #include <sys/module.h> -#ifdef DEVFS -#include <sys/devfsext.h> -#endif /*DEVFS*/ #include <sys/vnioctl.h> #include <vm/vm.h> @@ -104,7 +92,6 @@ static d_ioctl_t vnioctl; static d_open_t vnopen; static d_close_t vnclose; -static d_dump_t vndump; static d_psize_t vnsize; static d_strategy_t vnstrategy; @@ -133,16 +120,13 @@ static struct cdevsw vn_cdevsw = { /* name */ "vn", /* parms */ noparms, /* maj */ CDEV_MAJOR, - /* dump */ vndump, + /* dump */ nodump, /* psize */ vnsize, /* flags */ D_DISK|D_CANFREE, /* maxio */ 0, /* bmaj */ BDEV_MAJOR }; - -#define vnunit(dev) dkunit(dev) - #define getvnbuf() \ ((struct buf *)malloc(sizeof(struct buf), M_DEVBUF, M_WAITOK)) @@ -160,23 +144,18 @@ struct vn_softc { int sc_maxactive; /* max # of active requests */ struct buf sc_tab; /* transfer queue */ u_long sc_options; /* options */ -#ifdef DEVFS - void *r_devfs_token; - void *devfs_token; -#endif + SLIST_ENTRY(vn_softc) sc_list; }; +static SLIST_HEAD(, vn_softc) vn_list; + /* sc_flags */ #define VNF_INITED 0x01 -static struct vn_softc *vn_softc[NVN]; static u_long vn_options; #define IFOPT(vn,opt) if (((vn)->sc_options|vn_options) & (opt)) -#if 0 -static void vniodone (struct buf *bp); -#endif static int vnsetcred (struct vn_softc *vn, struct ucred *cred); static void vnclear (struct vn_softc *vn); static int vn_modevent (module_t, int, void *); @@ -186,7 +165,7 @@ static int vniocattach_swap (struct vn_softc *, struct vn_ioctl *, dev_t dev, i static int vnclose(dev_t dev, int flags, int mode, struct proc *p) { - struct vn_softc *vn = vn_softc[vnunit(dev)]; + struct vn_softc *vn = dev->si_drv1; IFOPT(vn, VN_LABELS) if (vn->sc_slices != NULL) @@ -197,23 +176,19 @@ vnclose(dev_t dev, int flags, int mode, struct proc *p) static int vnopen(dev_t dev, int flags, int mode, struct proc *p) { - int unit = vnunit(dev); + int unit = dkunit(dev); struct vn_softc *vn; - if (unit >= NVN) { - if (vn_options & VN_FOLLOW) - printf("vnopen(0x%lx, 0x%x, 0x%x, %p)\n", - (u_long)dev, flags, mode, (void *)p); - return(ENOENT); - } - - vn = vn_softc[unit]; + vn = dev->si_drv1; if (!vn) { vn = malloc(sizeof *vn, M_DEVBUF, M_WAITOK); if (!vn) return (ENOMEM); bzero(vn, sizeof *vn); - vn_softc[unit] = vn; + dev->si_drv1 = vn; + make_dev(&vn_cdevsw, 0, + UID_ROOT, GID_OPERATOR, 0640, "vn%d", unit); + SLIST_INSERT_HEAD(&vn_list, vn, sc_list); } IFOPT(vn, VN_FOLLOW) @@ -262,8 +237,8 @@ vnopen(dev_t dev, int flags, int mode, struct proc *p) static void vnstrategy(struct buf *bp) { - int unit = vnunit(bp->b_dev); - struct vn_softc *vn = vn_softc[unit]; + int unit = dkunit(bp->b_dev); + struct vn_softc *vn = bp->b_dev->si_drv1; int error; int isvplocked = 0; long sz; @@ -359,30 +334,20 @@ vnstrategy(struct buf *bp) } } - -#if 0 - -void -vniodone( struct buf *bp) { - bp->b_flags |= B_DONE; - wakeup((caddr_t) bp); -} - -#endif - /* ARGSUSED */ static int vnioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p) { - struct vn_softc *vn = vn_softc[vnunit(dev)]; + struct vn_softc *vn; struct vn_ioctl *vio; int error; u_long *f; + vn = dev->si_drv1; IFOPT(vn,VN_FOLLOW) printf("vnioctl(0x%lx, 0x%lx, %p, 0x%x, %p): unit %d\n", (u_long)dev, cmd, (void *)data, flag, (void *)p, - vnunit(dev)); + dkunit(dev)); switch (cmd) { case VNIOCATTACH: @@ -436,7 +401,7 @@ vnioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p) * XXX handle multiple opens of the device. Return EBUSY, * or revoke the fd's. * How are these problems handled for removable and failing - * hardware devices? + * hardware devices? (Hint: They are not) */ vnclear(vn); IFOPT(vn, VN_FOLLOW) @@ -675,76 +640,38 @@ vnclear(struct vn_softc *vn) static int vnsize(dev_t dev) { - int unit = vnunit(dev); struct vn_softc *vn; - if (unit < 0 || unit >= NVN) + vn = dev->si_drv1; + if (!vn) return(-1); - - vn = vn_softc[unit]; if ((vn->sc_flags & VNF_INITED) == 0) return(-1); return(vn->sc_size); } -static int -vndump(dev_t dev) -{ - return (ENODEV); -} - static int vn_modevent(module_t mod, int type, void *data) { - int unit; -#ifdef DEVFS struct vn_softc *vn; -#endif switch (type) { case MOD_LOAD: -#ifdef DEVFS - for (unit = 0; unit < NVN; unit++) { - vn = malloc(sizeof *vn, M_DEVBUF, M_WAITOK); - if (!vn) - continue; /* "oops" */ - bzero(vn, sizeof *vn); - vn_softc[unit] = vn; - vn->r_devfs_token = devfs_add_devswf(&vn_cdevsw, - dkmakeminor(unit, 0, 0), - DV_CHR, UID_ROOT, - GID_OPERATOR, 0640, - "rvn%d", unit); - vn->devfs_token = devfs_add_devswf(&vn_cdevsw, - dkmakeminor(unit, 0, 0), - DV_BLK, UID_ROOT, - GID_OPERATOR, 0640, - "vn%d", unit); - } -#endif break; case MOD_UNLOAD: -#ifdef DEVFS - for (unit = 0; unit < NVN; unit++) { - vn = vn_softc[unit]; - if (vn->r_devfs_token) { - devfs_remove_dev(vn->r_devfs_token); - vn->r_devfs_token = 0; - } - if (vn->devfs_token) { - devfs_remove_dev(vn->devfs_token); - vn->devfs_token = 0; - } - } -#endif /* fall through */ case MOD_SHUTDOWN: - for (unit = 0; unit < NVN; unit++) - if (vn_softc[unit] && - vn_softc[unit]->sc_flags & VNF_INITED) - vnclear(vn_softc[unit]); + for (;;) { + vn = SLIST_FIRST(&vn_list); + if (!vn) + break; + SLIST_REMOVE_HEAD(&vn_list, sc_list); + if (vn->sc_flags & VNF_INITED) + vnclear(vn); + free(vn, M_DEVBUF); + } break; default: break; @@ -753,5 +680,3 @@ vn_modevent(module_t mod, int type, void *data) } DEV_MODULE(vn, CDEV_MAJOR, BDEV_MAJOR, vn_cdevsw, vn_modevent, 0); - -#endif |