/* * Coda: an Experimental Distributed File System * Release 3.1 * * Copyright (c) 1987-1998 Carnegie Mellon University * All Rights Reserved * * Permission to use, copy, modify and distribute this software and its * documentation is hereby granted, provided that both the copyright * notice and this permission notice appear in all copies of the * software, derivative works or modified versions, and any portions * thereof, and that both notices appear in supporting documentation, and * that credit is given to Carnegie Mellon University in all documents * and publicity pertaining to direct or indirect use of this code or its * derivatives. * * CODA IS AN EXPERIMENTAL SOFTWARE SYSTEM AND IS KNOWN TO HAVE BUGS, * SOME OF WHICH MAY HAVE SERIOUS CONSEQUENCES. CARNEGIE MELLON ALLOWS * FREE USE OF THIS SOFTWARE IN ITS "AS IS" CONDITION. CARNEGIE MELLON * DISCLAIMS ANY LIABILITY OF ANY KIND FOR ANY DAMAGES WHATSOEVER * RESULTING DIRECTLY OR INDIRECTLY FROM THE USE OF THIS SOFTWARE OR OF * ANY DERIVATIVE WORK. * * Carnegie Mellon encourages users of this software to return any * improvements or extensions that they make, and to grant Carnegie * Mellon the rights to redistribute these changes without encumbrance. * * @(#) src/sys/coda/coda_fbsd.cr,v 1.1.1.1 1998/08/29 21:14:52 rvb Exp $ */ #include __FBSDID("$FreeBSD$"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include static struct cdevsw codadevsw = { .d_version = D_VERSION, .d_flags = D_NEEDGIANT, .d_open = vc_nb_open, .d_close = vc_nb_close, .d_read = vc_nb_read, .d_write = vc_nb_write, .d_ioctl = vc_nb_ioctl, .d_poll = vc_nb_poll, .d_name = "Coda", }; static eventhandler_tag clonetag; static LIST_HEAD(, coda_mntinfo) coda_mnttbl; int vcdebug = 1; #define VCDEBUG if (vcdebug) printf /* for DEVFS, using bpf & tun drivers as examples*/ static void coda_fbsd_clone(void *arg, char *name, int namelen, struct cdev **dev); static int codadev_modevent(module_t mod, int type, void *data) { struct coda_mntinfo *mnt; switch (type) { case MOD_LOAD: LIST_INIT(&coda_mnttbl); clonetag = EVENTHANDLER_REGISTER(dev_clone, coda_fbsd_clone, 0, 1000); break; case MOD_UNLOAD: EVENTHANDLER_DEREGISTER(dev_clone, clonetag); while ((mnt = LIST_FIRST(&coda_mnttbl)) != NULL) { LIST_REMOVE(mnt, mi_list); destroy_dev(mnt->dev); free(mnt, M_CODA); } break; default: return (EOPNOTSUPP); } return 0; } static moduledata_t codadev_mod = { "codadev", codadev_modevent, NULL }; DECLARE_MODULE(codadev, codadev_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE); int coda_fbsd_getpages(v) void *v; { struct vop_getpages_args *ap = v; #if 1 return vop_stdgetpages(ap); #else { struct vnode *vp = ap->a_vp; struct cnode *cp = VTOC(vp); struct vnode *cfvp = cp->c_ovp; int opened_internally = 0; struct ucred *cred = (struct ucred *) 0; struct proc *p = curproc; int error = 0; if (IS_CTL_VP(vp)) { return(EINVAL); } /* Redirect the request to UFS. */ if (cfvp == NULL) { opened_internally = 1; error = VOP_OPEN(vp, FREAD, cred, p, -1); printf("coda_getp: Internally Opening %p\n", vp); if (error) { printf("coda_getpage: VOP_OPEN on container failed %d\n", error); return (error); } if (vp->v_type == VREG) { error = vfs_object_create(vp, p, cred); if (error != 0) { printf("coda_getpage: vfs_object_create() returns %d\n", error); vput(vp); return(error); } } cfvp = cp->c_ovp; } else { printf("coda_getp: has container %p\n", cfvp); } printf("coda_fbsd_getpages: using container "); /* error = vnode_pager_generic_getpages(cfvp, ap->a_m, ap->a_count, ap->a_reqpage); */ error = VOP_GETPAGES(cfvp, ap->a_m, ap->a_count, ap->a_reqpage, ap->a_offset); printf("error = %d\n", error); /* Do an internal close if necessary. */ if (opened_internally) { (void)VOP_CLOSE(vp, FREAD, cred, p); } return(error); } #endif } static void coda_fbsd_clone(arg, name, namelen, dev) void *arg; char *name; int namelen; struct cdev **dev; { int u; struct coda_mntinfo *mnt; if (*dev != NULL) return; if (dev_stdclone(name,NULL,"cfs",&u) != 1) return; *dev = make_dev(&codadevsw,unit2minor(u),UID_ROOT,GID_WHEEL,0600,"cfs%d",u); mnt = malloc(sizeof(struct coda_mntinfo), M_CODA, M_WAITOK|M_ZERO); LIST_INSERT_HEAD(&coda_mnttbl, mnt, mi_list); } struct coda_mntinfo * dev2coda_mntinfo(struct cdev *dev) { struct coda_mntinfo *mnt; LIST_FOREACH(mnt, &coda_mnttbl, mi_list) { if (mnt->dev == dev) break; } return mnt; }