Index: stable/10/sys/fs/devfs/devfs_vnops.c =================================================================== --- stable/10/sys/fs/devfs/devfs_vnops.c (revision 292874) +++ stable/10/sys/fs/devfs/devfs_vnops.c (revision 292875) @@ -1,1813 +1,1820 @@ /*- * Copyright (c) 2000-2004 * Poul-Henning Kamp. All rights reserved. * Copyright (c) 1989, 1992-1993, 1995 * The Regents of the University of California. All rights reserved. * * This code is derived from software donated to Berkeley by * Jan-Simon Pendry. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)kernfs_vnops.c 8.15 (Berkeley) 5/21/95 * From: FreeBSD: src/sys/miscfs/kernfs/kernfs_vnops.c 1.43 * * $FreeBSD$ */ /* * TODO: * mkdir: want it ? */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include static struct vop_vector devfs_vnodeops; static struct vop_vector devfs_specops; static struct fileops devfs_ops_f; #include #include #include static MALLOC_DEFINE(M_CDEVPDATA, "DEVFSP", "Metainfo for cdev-fp data"); struct mtx devfs_de_interlock; MTX_SYSINIT(devfs_de_interlock, &devfs_de_interlock, "devfs interlock", MTX_DEF); struct sx clone_drain_lock; SX_SYSINIT(clone_drain_lock, &clone_drain_lock, "clone events drain lock"); struct mtx cdevpriv_mtx; MTX_SYSINIT(cdevpriv_mtx, &cdevpriv_mtx, "cdevpriv lock", MTX_DEF); SYSCTL_DECL(_vfs_devfs); static int devfs_dotimes; SYSCTL_INT(_vfs_devfs, OID_AUTO, dotimes, CTLFLAG_RW, &devfs_dotimes, 0, "Update timestamps on DEVFS with default precision"); /* * Update devfs node timestamp. Note that updates are unlocked and * stat(2) could see partially updated times. */ static void devfs_timestamp(struct timespec *tsp) { time_t ts; if (devfs_dotimes) { vfs_timestamp(tsp); } else { ts = time_second; if (tsp->tv_sec != ts) { tsp->tv_sec = ts; tsp->tv_nsec = 0; } } } static int devfs_fp_check(struct file *fp, struct cdev **devp, struct cdevsw **dswp, int *ref) { *dswp = devvn_refthread(fp->f_vnode, devp, ref); if (*devp != fp->f_data) { if (*dswp != NULL) dev_relthread(*devp, *ref); return (ENXIO); } KASSERT((*devp)->si_refcount > 0, ("devfs: un-referenced struct cdev *(%s)", devtoname(*devp))); if (*dswp == NULL) return (ENXIO); curthread->td_fpop = fp; return (0); } int devfs_get_cdevpriv(void **datap) { struct file *fp; struct cdev_privdata *p; int error; fp = curthread->td_fpop; if (fp == NULL) return (EBADF); p = fp->f_cdevpriv; if (p != NULL) { error = 0; *datap = p->cdpd_data; } else error = ENOENT; return (error); } int devfs_set_cdevpriv(void *priv, cdevpriv_dtr_t priv_dtr) { struct file *fp; struct cdev_priv *cdp; struct cdev_privdata *p; int error; fp = curthread->td_fpop; if (fp == NULL) return (ENOENT); cdp = cdev2priv((struct cdev *)fp->f_data); p = malloc(sizeof(struct cdev_privdata), M_CDEVPDATA, M_WAITOK); p->cdpd_data = priv; p->cdpd_dtr = priv_dtr; p->cdpd_fp = fp; mtx_lock(&cdevpriv_mtx); if (fp->f_cdevpriv == NULL) { LIST_INSERT_HEAD(&cdp->cdp_fdpriv, p, cdpd_list); fp->f_cdevpriv = p; mtx_unlock(&cdevpriv_mtx); error = 0; } else { mtx_unlock(&cdevpriv_mtx); free(p, M_CDEVPDATA); error = EBUSY; } return (error); } void devfs_destroy_cdevpriv(struct cdev_privdata *p) { mtx_assert(&cdevpriv_mtx, MA_OWNED); p->cdpd_fp->f_cdevpriv = NULL; LIST_REMOVE(p, cdpd_list); mtx_unlock(&cdevpriv_mtx); (p->cdpd_dtr)(p->cdpd_data); free(p, M_CDEVPDATA); } void devfs_fpdrop(struct file *fp) { struct cdev_privdata *p; mtx_lock(&cdevpriv_mtx); if ((p = fp->f_cdevpriv) == NULL) { mtx_unlock(&cdevpriv_mtx); return; } devfs_destroy_cdevpriv(p); } void devfs_clear_cdevpriv(void) { struct file *fp; fp = curthread->td_fpop; if (fp == NULL) return; devfs_fpdrop(fp); } /* * On success devfs_populate_vp() returns with dmp->dm_lock held. */ static int devfs_populate_vp(struct vnode *vp) { struct devfs_dirent *de; struct devfs_mount *dmp; int locked; ASSERT_VOP_LOCKED(vp, "devfs_populate_vp"); dmp = VFSTODEVFS(vp->v_mount); locked = VOP_ISLOCKED(vp); sx_xlock(&dmp->dm_lock); DEVFS_DMP_HOLD(dmp); /* Can't call devfs_populate() with the vnode lock held. */ VOP_UNLOCK(vp, 0); devfs_populate(dmp); sx_xunlock(&dmp->dm_lock); vn_lock(vp, locked | LK_RETRY); sx_xlock(&dmp->dm_lock); if (DEVFS_DMP_DROP(dmp)) { sx_xunlock(&dmp->dm_lock); devfs_unmount_final(dmp); return (EBADF); } if ((vp->v_iflag & VI_DOOMED) != 0) { sx_xunlock(&dmp->dm_lock); return (EBADF); } de = vp->v_data; KASSERT(de != NULL, ("devfs_populate_vp: vp->v_data == NULL but vnode not doomed")); if ((de->de_flags & DE_DOOMED) != 0) { sx_xunlock(&dmp->dm_lock); return (EBADF); } return (0); } static int devfs_vptocnp(struct vop_vptocnp_args *ap) { struct vnode *vp = ap->a_vp; struct vnode **dvp = ap->a_vpp; struct devfs_mount *dmp; char *buf = ap->a_buf; int *buflen = ap->a_buflen; struct devfs_dirent *dd, *de; int i, error; dmp = VFSTODEVFS(vp->v_mount); error = devfs_populate_vp(vp); if (error != 0) return (error); i = *buflen; dd = vp->v_data; if (vp->v_type == VCHR) { i -= strlen(dd->de_cdp->cdp_c.si_name); if (i < 0) { error = ENOMEM; goto finished; } bcopy(dd->de_cdp->cdp_c.si_name, buf + i, strlen(dd->de_cdp->cdp_c.si_name)); de = dd->de_dir; } else if (vp->v_type == VDIR) { if (dd == dmp->dm_rootdir) { *dvp = vp; vref(*dvp); goto finished; } i -= dd->de_dirent->d_namlen; if (i < 0) { error = ENOMEM; goto finished; } bcopy(dd->de_dirent->d_name, buf + i, dd->de_dirent->d_namlen); de = dd; } else { error = ENOENT; goto finished; } *buflen = i; de = devfs_parent_dirent(de); if (de == NULL) { error = ENOENT; goto finished; } mtx_lock(&devfs_de_interlock); *dvp = de->de_vnode; if (*dvp != NULL) { VI_LOCK(*dvp); mtx_unlock(&devfs_de_interlock); vholdl(*dvp); VI_UNLOCK(*dvp); vref(*dvp); vdrop(*dvp); } else { mtx_unlock(&devfs_de_interlock); error = ENOENT; } finished: sx_xunlock(&dmp->dm_lock); return (error); } /* * Construct the fully qualified path name relative to the mountpoint. * If a NULL cnp is provided, no '/' is appended to the resulting path. */ char * devfs_fqpn(char *buf, struct devfs_mount *dmp, struct devfs_dirent *dd, struct componentname *cnp) { int i; struct devfs_dirent *de; sx_assert(&dmp->dm_lock, SA_LOCKED); i = SPECNAMELEN; buf[i] = '\0'; if (cnp != NULL) i -= cnp->cn_namelen; if (i < 0) return (NULL); if (cnp != NULL) bcopy(cnp->cn_nameptr, buf + i, cnp->cn_namelen); de = dd; while (de != dmp->dm_rootdir) { if (cnp != NULL || i < SPECNAMELEN) { i--; if (i < 0) return (NULL); buf[i] = '/'; } i -= de->de_dirent->d_namlen; if (i < 0) return (NULL); bcopy(de->de_dirent->d_name, buf + i, de->de_dirent->d_namlen); de = devfs_parent_dirent(de); if (de == NULL) return (NULL); } return (buf + i); } static int devfs_allocv_drop_refs(int drop_dm_lock, struct devfs_mount *dmp, struct devfs_dirent *de) { int not_found; not_found = 0; if (de->de_flags & DE_DOOMED) not_found = 1; if (DEVFS_DE_DROP(de)) { KASSERT(not_found == 1, ("DEVFS de dropped but not doomed")); devfs_dirent_free(de); } if (DEVFS_DMP_DROP(dmp)) { KASSERT(not_found == 1, ("DEVFS mount struct freed before dirent")); not_found = 2; sx_xunlock(&dmp->dm_lock); devfs_unmount_final(dmp); } if (not_found == 1 || (drop_dm_lock && not_found != 2)) sx_unlock(&dmp->dm_lock); return (not_found); } static void devfs_insmntque_dtr(struct vnode *vp, void *arg) { struct devfs_dirent *de; de = (struct devfs_dirent *)arg; mtx_lock(&devfs_de_interlock); vp->v_data = NULL; de->de_vnode = NULL; mtx_unlock(&devfs_de_interlock); vgone(vp); vput(vp); } /* * devfs_allocv shall be entered with dmp->dm_lock held, and it drops * it on return. */ int devfs_allocv(struct devfs_dirent *de, struct mount *mp, int lockmode, struct vnode **vpp) { int error; struct vnode *vp; struct cdev *dev; struct devfs_mount *dmp; struct cdevsw *dsw; dmp = VFSTODEVFS(mp); if (de->de_flags & DE_DOOMED) { sx_xunlock(&dmp->dm_lock); return (ENOENT); } loop: DEVFS_DE_HOLD(de); DEVFS_DMP_HOLD(dmp); mtx_lock(&devfs_de_interlock); vp = de->de_vnode; if (vp != NULL) { VI_LOCK(vp); mtx_unlock(&devfs_de_interlock); sx_xunlock(&dmp->dm_lock); vget(vp, lockmode | LK_INTERLOCK | LK_RETRY, curthread); sx_xlock(&dmp->dm_lock); if (devfs_allocv_drop_refs(0, dmp, de)) { vput(vp); return (ENOENT); } else if ((vp->v_iflag & VI_DOOMED) != 0) { mtx_lock(&devfs_de_interlock); if (de->de_vnode == vp) { de->de_vnode = NULL; vp->v_data = NULL; } mtx_unlock(&devfs_de_interlock); vput(vp); goto loop; } sx_xunlock(&dmp->dm_lock); *vpp = vp; return (0); } mtx_unlock(&devfs_de_interlock); if (de->de_dirent->d_type == DT_CHR) { if (!(de->de_cdp->cdp_flags & CDP_ACTIVE)) { devfs_allocv_drop_refs(1, dmp, de); return (ENOENT); } dev = &de->de_cdp->cdp_c; } else { dev = NULL; } error = getnewvnode("devfs", mp, &devfs_vnodeops, &vp); if (error != 0) { devfs_allocv_drop_refs(1, dmp, de); printf("devfs_allocv: failed to allocate new vnode\n"); return (error); } if (de->de_dirent->d_type == DT_CHR) { vp->v_type = VCHR; VI_LOCK(vp); dev_lock(); dev_refl(dev); /* XXX: v_rdev should be protect by vnode lock */ vp->v_rdev = dev; KASSERT(vp->v_usecount == 1, ("%s %d (%d)\n", __func__, __LINE__, vp->v_usecount)); dev->si_usecount += vp->v_usecount; /* Special casing of ttys for deadfs. Probably redundant. */ dsw = dev->si_devsw; if (dsw != NULL && (dsw->d_flags & D_TTY) != 0) vp->v_vflag |= VV_ISTTY; dev_unlock(); VI_UNLOCK(vp); if ((dev->si_flags & SI_ETERNAL) != 0) vp->v_vflag |= VV_ETERNALDEV; vp->v_op = &devfs_specops; } else if (de->de_dirent->d_type == DT_DIR) { vp->v_type = VDIR; } else if (de->de_dirent->d_type == DT_LNK) { vp->v_type = VLNK; } else { vp->v_type = VBAD; } vn_lock(vp, LK_EXCLUSIVE | LK_RETRY | LK_NOWITNESS); VN_LOCK_ASHARE(vp); mtx_lock(&devfs_de_interlock); vp->v_data = de; de->de_vnode = vp; mtx_unlock(&devfs_de_interlock); error = insmntque1(vp, mp, devfs_insmntque_dtr, de); if (error != 0) { (void) devfs_allocv_drop_refs(1, dmp, de); return (error); } if (devfs_allocv_drop_refs(0, dmp, de)) { vput(vp); return (ENOENT); } #ifdef MAC mac_devfs_vnode_associate(mp, de, vp); #endif sx_xunlock(&dmp->dm_lock); *vpp = vp; return (0); } static int devfs_access(struct vop_access_args *ap) { struct vnode *vp = ap->a_vp; struct devfs_dirent *de; int error; de = vp->v_data; if (vp->v_type == VDIR) de = de->de_dir; error = vaccess(vp->v_type, de->de_mode, de->de_uid, de->de_gid, ap->a_accmode, ap->a_cred, NULL); if (error == 0) return (0); if (error != EACCES) return (error); /* We do, however, allow access to the controlling terminal */ if (!(ap->a_td->td_proc->p_flag & P_CONTROLT)) return (error); if (ap->a_td->td_proc->p_session->s_ttydp == de->de_cdp) return (0); return (error); } /* ARGSUSED */ static int devfs_close(struct vop_close_args *ap) { struct vnode *vp = ap->a_vp, *oldvp; struct thread *td = ap->a_td; struct cdev *dev = vp->v_rdev; struct cdevsw *dsw; int vp_locked, error, ref; /* * XXX: Don't call d_close() if we were called because of * XXX: insmntque1() failure. */ if (vp->v_data == NULL) return (0); /* * Hack: a tty device that is a controlling terminal * has a reference from the session structure. * We cannot easily tell that a character device is * a controlling terminal, unless it is the closing * process' controlling terminal. In that case, * if the reference count is 2 (this last descriptor * plus the session), release the reference from the session. */ oldvp = NULL; sx_xlock(&proctree_lock); if (td && vp == td->td_proc->p_session->s_ttyvp) { SESS_LOCK(td->td_proc->p_session); VI_LOCK(vp); if (count_dev(dev) == 2 && (vp->v_iflag & VI_DOOMED) == 0) { td->td_proc->p_session->s_ttyvp = NULL; td->td_proc->p_session->s_ttydp = NULL; oldvp = vp; } VI_UNLOCK(vp); SESS_UNLOCK(td->td_proc->p_session); } sx_xunlock(&proctree_lock); if (oldvp != NULL) vrele(oldvp); /* * We do not want to really close the device if it * is still in use unless we are trying to close it * forcibly. Since every use (buffer, vnode, swap, cmap) * holds a reference to the vnode, and because we mark * any other vnodes that alias this device, when the * sum of the reference counts on all the aliased * vnodes descends to one, we are on last close. */ dsw = dev_refthread(dev, &ref); if (dsw == NULL) return (ENXIO); VI_LOCK(vp); if (vp->v_iflag & VI_DOOMED) { /* Forced close. */ } else if (dsw->d_flags & D_TRACKCLOSE) { /* Keep device updated on status. */ } else if (count_dev(dev) > 1) { VI_UNLOCK(vp); dev_relthread(dev, ref); return (0); } vholdl(vp); VI_UNLOCK(vp); vp_locked = VOP_ISLOCKED(vp); VOP_UNLOCK(vp, 0); KASSERT(dev->si_refcount > 0, ("devfs_close() on un-referenced struct cdev *(%s)", devtoname(dev))); error = dsw->d_close(dev, ap->a_fflag, S_IFCHR, td); dev_relthread(dev, ref); vn_lock(vp, vp_locked | LK_RETRY); vdrop(vp); return (error); } static int devfs_close_f(struct file *fp, struct thread *td) { int error; struct file *fpop; /* * NB: td may be NULL if this descriptor is closed due to * garbage collection from a closed UNIX domain socket. */ fpop = curthread->td_fpop; curthread->td_fpop = fp; error = vnops.fo_close(fp, td); curthread->td_fpop = fpop; /* * The f_cdevpriv cannot be assigned non-NULL value while we * are destroying the file. */ if (fp->f_cdevpriv != NULL) devfs_fpdrop(fp); return (error); } static int devfs_fsync(struct vop_fsync_args *ap) { int error; struct bufobj *bo; struct devfs_dirent *de; if (!vn_isdisk(ap->a_vp, &error)) { bo = &ap->a_vp->v_bufobj; de = ap->a_vp->v_data; if (error == ENXIO && bo->bo_dirty.bv_cnt > 0) { printf("Device %s went missing before all of the data " "could be written to it; expect data loss.\n", de->de_dirent->d_name); error = vop_stdfsync(ap); if (bo->bo_dirty.bv_cnt != 0 || error != 0) panic("devfs_fsync: vop_stdfsync failed."); } return (0); } return (vop_stdfsync(ap)); } static int devfs_getattr(struct vop_getattr_args *ap) { struct vnode *vp = ap->a_vp; struct vattr *vap = ap->a_vap; int error; struct devfs_dirent *de; struct devfs_mount *dmp; struct cdev *dev; error = devfs_populate_vp(vp); if (error != 0) return (error); dmp = VFSTODEVFS(vp->v_mount); sx_xunlock(&dmp->dm_lock); de = vp->v_data; KASSERT(de != NULL, ("Null dirent in devfs_getattr vp=%p", vp)); if (vp->v_type == VDIR) { de = de->de_dir; KASSERT(de != NULL, ("Null dir dirent in devfs_getattr vp=%p", vp)); } vap->va_uid = de->de_uid; vap->va_gid = de->de_gid; vap->va_mode = de->de_mode; if (vp->v_type == VLNK) vap->va_size = strlen(de->de_symlink); else if (vp->v_type == VDIR) vap->va_size = vap->va_bytes = DEV_BSIZE; else vap->va_size = 0; if (vp->v_type != VDIR) vap->va_bytes = 0; vap->va_blocksize = DEV_BSIZE; vap->va_type = vp->v_type; #define fix(aa) \ do { \ if ((aa).tv_sec <= 3600) { \ (aa).tv_sec = boottime.tv_sec; \ (aa).tv_nsec = boottime.tv_usec * 1000; \ } \ } while (0) if (vp->v_type != VCHR) { fix(de->de_atime); vap->va_atime = de->de_atime; fix(de->de_mtime); vap->va_mtime = de->de_mtime; fix(de->de_ctime); vap->va_ctime = de->de_ctime; } else { dev = vp->v_rdev; fix(dev->si_atime); vap->va_atime = dev->si_atime; fix(dev->si_mtime); vap->va_mtime = dev->si_mtime; fix(dev->si_ctime); vap->va_ctime = dev->si_ctime; vap->va_rdev = cdev2priv(dev)->cdp_inode; } vap->va_gen = 0; vap->va_flags = 0; vap->va_filerev = 0; vap->va_nlink = de->de_links; vap->va_fileid = de->de_inode; return (error); } /* ARGSUSED */ static int devfs_ioctl_f(struct file *fp, u_long com, void *data, struct ucred *cred, struct thread *td) { struct cdev *dev; struct cdevsw *dsw; struct vnode *vp; struct vnode *vpold; int error, i, ref; const char *p; struct fiodgname_arg *fgn; struct file *fpop; fpop = td->td_fpop; error = devfs_fp_check(fp, &dev, &dsw, &ref); if (error != 0) { error = vnops.fo_ioctl(fp, com, data, cred, td); return (error); } if (com == FIODTYPE) { *(int *)data = dsw->d_flags & D_TYPEMASK; td->td_fpop = fpop; dev_relthread(dev, ref); return (0); } else if (com == FIODGNAME) { fgn = data; p = devtoname(dev); i = strlen(p) + 1; if (i > fgn->len) error = EINVAL; else error = copyout(p, fgn->buf, i); td->td_fpop = fpop; dev_relthread(dev, ref); return (error); } error = dsw->d_ioctl(dev, com, data, fp->f_flag, td); td->td_fpop = NULL; dev_relthread(dev, ref); if (error == ENOIOCTL) error = ENOTTY; if (error == 0 && com == TIOCSCTTY) { vp = fp->f_vnode; /* Do nothing if reassigning same control tty */ sx_slock(&proctree_lock); if (td->td_proc->p_session->s_ttyvp == vp) { sx_sunlock(&proctree_lock); return (0); } vpold = td->td_proc->p_session->s_ttyvp; VREF(vp); SESS_LOCK(td->td_proc->p_session); td->td_proc->p_session->s_ttyvp = vp; td->td_proc->p_session->s_ttydp = cdev2priv(dev); SESS_UNLOCK(td->td_proc->p_session); sx_sunlock(&proctree_lock); /* Get rid of reference to old control tty */ if (vpold) vrele(vpold); } return (error); } /* ARGSUSED */ static int devfs_kqfilter_f(struct file *fp, struct knote *kn) { struct cdev *dev; struct cdevsw *dsw; int error, ref; struct file *fpop; struct thread *td; td = curthread; fpop = td->td_fpop; error = devfs_fp_check(fp, &dev, &dsw, &ref); if (error) return (error); error = dsw->d_kqfilter(dev, kn); td->td_fpop = fpop; dev_relthread(dev, ref); return (error); } static inline int devfs_prison_check(struct devfs_dirent *de, struct thread *td) { struct cdev_priv *cdp; struct ucred *dcr; int error; cdp = de->de_cdp; if (cdp == NULL) return (0); dcr = cdp->cdp_c.si_cred; if (dcr == NULL) return (0); error = prison_check(td->td_ucred, dcr); if (error == 0) return (0); /* We do, however, allow access to the controlling terminal */ if (!(td->td_proc->p_flag & P_CONTROLT)) return (error); if (td->td_proc->p_session->s_ttydp == cdp) return (0); return (error); } static int devfs_lookupx(struct vop_lookup_args *ap, int *dm_unlock) { struct componentname *cnp; struct vnode *dvp, **vpp; struct thread *td; struct devfs_dirent *de, *dd; struct devfs_dirent **dde; struct devfs_mount *dmp; struct cdev *cdev; int error, flags, nameiop, dvplocked; char specname[SPECNAMELEN + 1], *pname; cnp = ap->a_cnp; vpp = ap->a_vpp; dvp = ap->a_dvp; pname = cnp->cn_nameptr; td = cnp->cn_thread; flags = cnp->cn_flags; nameiop = cnp->cn_nameiop; dmp = VFSTODEVFS(dvp->v_mount); dd = dvp->v_data; *vpp = NULLVP; if ((flags & ISLASTCN) && nameiop == RENAME) return (EOPNOTSUPP); if (dvp->v_type != VDIR) return (ENOTDIR); if ((flags & ISDOTDOT) && (dvp->v_vflag & VV_ROOT)) return (EIO); error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, td); if (error) return (error); if (cnp->cn_namelen == 1 && *pname == '.') { if ((flags & ISLASTCN) && nameiop != LOOKUP) return (EINVAL); *vpp = dvp; VREF(dvp); return (0); } if (flags & ISDOTDOT) { if ((flags & ISLASTCN) && nameiop != LOOKUP) return (EINVAL); de = devfs_parent_dirent(dd); if (de == NULL) return (ENOENT); dvplocked = VOP_ISLOCKED(dvp); VOP_UNLOCK(dvp, 0); error = devfs_allocv(de, dvp->v_mount, cnp->cn_lkflags & LK_TYPE_MASK, vpp); *dm_unlock = 0; vn_lock(dvp, dvplocked | LK_RETRY); return (error); } dd = dvp->v_data; de = devfs_find(dd, cnp->cn_nameptr, cnp->cn_namelen, 0); while (de == NULL) { /* While(...) so we can use break */ if (nameiop == DELETE) return (ENOENT); /* * OK, we didn't have an entry for the name we were asked for * so we try to see if anybody can create it on demand. */ pname = devfs_fqpn(specname, dmp, dd, cnp); if (pname == NULL) break; cdev = NULL; DEVFS_DMP_HOLD(dmp); sx_xunlock(&dmp->dm_lock); sx_slock(&clone_drain_lock); EVENTHANDLER_INVOKE(dev_clone, td->td_ucred, pname, strlen(pname), &cdev); sx_sunlock(&clone_drain_lock); if (cdev == NULL) sx_xlock(&dmp->dm_lock); else if (devfs_populate_vp(dvp) != 0) { *dm_unlock = 0; sx_xlock(&dmp->dm_lock); if (DEVFS_DMP_DROP(dmp)) { sx_xunlock(&dmp->dm_lock); devfs_unmount_final(dmp); } else sx_xunlock(&dmp->dm_lock); dev_rel(cdev); return (ENOENT); } if (DEVFS_DMP_DROP(dmp)) { *dm_unlock = 0; sx_xunlock(&dmp->dm_lock); devfs_unmount_final(dmp); if (cdev != NULL) dev_rel(cdev); return (ENOENT); } if (cdev == NULL) break; dev_lock(); dde = &cdev2priv(cdev)->cdp_dirents[dmp->dm_idx]; if (dde != NULL && *dde != NULL) de = *dde; dev_unlock(); dev_rel(cdev); break; } if (de == NULL || de->de_flags & DE_WHITEOUT) { if ((nameiop == CREATE || nameiop == RENAME) && (flags & (LOCKPARENT | WANTPARENT)) && (flags & ISLASTCN)) { cnp->cn_flags |= SAVENAME; return (EJUSTRETURN); } return (ENOENT); } if (devfs_prison_check(de, td)) return (ENOENT); if ((cnp->cn_nameiop == DELETE) && (flags & ISLASTCN)) { error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred, td); if (error) return (error); if (*vpp == dvp) { VREF(dvp); *vpp = dvp; return (0); } } error = devfs_allocv(de, dvp->v_mount, cnp->cn_lkflags & LK_TYPE_MASK, vpp); *dm_unlock = 0; return (error); } static int devfs_lookup(struct vop_lookup_args *ap) { int j; struct devfs_mount *dmp; int dm_unlock; if (devfs_populate_vp(ap->a_dvp) != 0) return (ENOTDIR); dmp = VFSTODEVFS(ap->a_dvp->v_mount); dm_unlock = 1; j = devfs_lookupx(ap, &dm_unlock); if (dm_unlock == 1) sx_xunlock(&dmp->dm_lock); return (j); } static int devfs_mknod(struct vop_mknod_args *ap) { struct componentname *cnp; struct vnode *dvp, **vpp; struct devfs_dirent *dd, *de; struct devfs_mount *dmp; int error; /* * The only type of node we should be creating here is a * character device, for anything else return EOPNOTSUPP. */ if (ap->a_vap->va_type != VCHR) return (EOPNOTSUPP); dvp = ap->a_dvp; dmp = VFSTODEVFS(dvp->v_mount); cnp = ap->a_cnp; vpp = ap->a_vpp; dd = dvp->v_data; error = ENOENT; sx_xlock(&dmp->dm_lock); TAILQ_FOREACH(de, &dd->de_dlist, de_list) { if (cnp->cn_namelen != de->de_dirent->d_namlen) continue; if (de->de_dirent->d_type == DT_CHR && (de->de_cdp->cdp_flags & CDP_ACTIVE) == 0) continue; if (bcmp(cnp->cn_nameptr, de->de_dirent->d_name, de->de_dirent->d_namlen) != 0) continue; if (de->de_flags & DE_WHITEOUT) break; goto notfound; } if (de == NULL) goto notfound; de->de_flags &= ~DE_WHITEOUT; error = devfs_allocv(de, dvp->v_mount, LK_EXCLUSIVE, vpp); return (error); notfound: sx_xunlock(&dmp->dm_lock); return (error); } /* ARGSUSED */ static int devfs_open(struct vop_open_args *ap) { struct thread *td = ap->a_td; struct vnode *vp = ap->a_vp; struct cdev *dev = vp->v_rdev; struct file *fp = ap->a_fp; int error, ref, vlocked; struct cdevsw *dsw; struct file *fpop; struct mtx *mtxp; if (vp->v_type == VBLK) return (ENXIO); if (dev == NULL) return (ENXIO); /* Make this field valid before any I/O in d_open. */ if (dev->si_iosize_max == 0) dev->si_iosize_max = DFLTPHYS; dsw = dev_refthread(dev, &ref); if (dsw == NULL) return (ENXIO); if (fp == NULL && dsw->d_fdopen != NULL) { dev_relthread(dev, ref); return (ENXIO); } vlocked = VOP_ISLOCKED(vp); VOP_UNLOCK(vp, 0); fpop = td->td_fpop; td->td_fpop = fp; if (fp != NULL) { fp->f_data = dev; fp->f_vnode = vp; } if (dsw->d_fdopen != NULL) error = dsw->d_fdopen(dev, ap->a_mode, td, fp); else error = dsw->d_open(dev, ap->a_mode, S_IFCHR, td); /* cleanup any cdevpriv upon error */ if (error != 0) devfs_clear_cdevpriv(); td->td_fpop = fpop; vn_lock(vp, vlocked | LK_RETRY); dev_relthread(dev, ref); if (error != 0) { if (error == ERESTART) error = EINTR; return (error); } #if 0 /* /dev/console */ KASSERT(fp != NULL, ("Could not vnode bypass device on NULL fp")); #else if (fp == NULL) return (error); #endif if (fp->f_ops == &badfileops) finit(fp, fp->f_flag, DTYPE_VNODE, dev, &devfs_ops_f); mtxp = mtx_pool_find(mtxpool_sleep, fp); /* * Hint to the dofilewrite() to not force the buffer draining * on the writer to the file. Most likely, the write would * not need normal buffers. */ mtx_lock(mtxp); fp->f_vnread_flags |= FDEVFS_VNODE; mtx_unlock(mtxp); return (error); } static int devfs_pathconf(struct vop_pathconf_args *ap) { switch (ap->a_name) { case _PC_MAC_PRESENT: #ifdef MAC /* * If MAC is enabled, devfs automatically supports * trivial non-persistant label storage. */ *ap->a_retval = 1; #else *ap->a_retval = 0; #endif return (0); default: return (vop_stdpathconf(ap)); } /* NOTREACHED */ } /* ARGSUSED */ static int devfs_poll_f(struct file *fp, int events, struct ucred *cred, struct thread *td) { struct cdev *dev; struct cdevsw *dsw; int error, ref; struct file *fpop; fpop = td->td_fpop; error = devfs_fp_check(fp, &dev, &dsw, &ref); if (error != 0) { error = vnops.fo_poll(fp, events, cred, td); return (error); } error = dsw->d_poll(dev, events, td); td->td_fpop = fpop; dev_relthread(dev, ref); return(error); } /* * Print out the contents of a special device vnode. */ static int devfs_print(struct vop_print_args *ap) { printf("\tdev %s\n", devtoname(ap->a_vp->v_rdev)); return (0); } static int devfs_read_f(struct file *fp, struct uio *uio, struct ucred *cred, int flags, struct thread *td) { struct cdev *dev; int ioflag, error, ref; ssize_t resid; struct cdevsw *dsw; struct file *fpop; if (uio->uio_resid > DEVFS_IOSIZE_MAX) return (EINVAL); fpop = td->td_fpop; error = devfs_fp_check(fp, &dev, &dsw, &ref); if (error != 0) { error = vnops.fo_read(fp, uio, cred, flags, td); return (error); } resid = uio->uio_resid; ioflag = fp->f_flag & (O_NONBLOCK | O_DIRECT); if (ioflag & O_DIRECT) ioflag |= IO_DIRECT; foffset_lock_uio(fp, uio, flags | FOF_NOLOCK); error = dsw->d_read(dev, uio, ioflag); if (uio->uio_resid != resid || (error == 0 && resid != 0)) devfs_timestamp(&dev->si_atime); td->td_fpop = fpop; dev_relthread(dev, ref); foffset_unlock_uio(fp, uio, flags | FOF_NOLOCK | FOF_NEXTOFF); return (error); } static int devfs_readdir(struct vop_readdir_args *ap) { int error; struct uio *uio; struct dirent *dp; struct devfs_dirent *dd; struct devfs_dirent *de; struct devfs_mount *dmp; off_t off; int *tmp_ncookies = NULL; if (ap->a_vp->v_type != VDIR) return (ENOTDIR); uio = ap->a_uio; if (uio->uio_offset < 0) return (EINVAL); /* * XXX: This is a temporary hack to get around this filesystem not * supporting cookies. We store the location of the ncookies pointer * in a temporary variable before calling vfs_subr.c:vfs_read_dirent() * and set the number of cookies to 0. We then set the pointer to * NULL so that vfs_read_dirent doesn't try to call realloc() on * ap->a_cookies. Later in this function, we restore the ap->a_ncookies * pointer to its original location before returning to the caller. */ if (ap->a_ncookies != NULL) { tmp_ncookies = ap->a_ncookies; *ap->a_ncookies = 0; ap->a_ncookies = NULL; } dmp = VFSTODEVFS(ap->a_vp->v_mount); if (devfs_populate_vp(ap->a_vp) != 0) { if (tmp_ncookies != NULL) ap->a_ncookies = tmp_ncookies; return (EIO); } error = 0; de = ap->a_vp->v_data; off = 0; TAILQ_FOREACH(dd, &de->de_dlist, de_list) { KASSERT(dd->de_cdp != (void *)0xdeadc0de, ("%s %d\n", __func__, __LINE__)); if (dd->de_flags & (DE_COVERED | DE_WHITEOUT)) continue; if (devfs_prison_check(dd, uio->uio_td)) continue; if (dd->de_dirent->d_type == DT_DIR) de = dd->de_dir; else de = dd; dp = dd->de_dirent; if (dp->d_reclen > uio->uio_resid) break; dp->d_fileno = de->de_inode; if (off >= uio->uio_offset) { error = vfs_read_dirent(ap, dp, off); if (error) break; } off += dp->d_reclen; } sx_xunlock(&dmp->dm_lock); uio->uio_offset = off; /* * Restore ap->a_ncookies if it wasn't originally NULL in the first * place. */ if (tmp_ncookies != NULL) ap->a_ncookies = tmp_ncookies; return (error); } static int devfs_readlink(struct vop_readlink_args *ap) { struct devfs_dirent *de; de = ap->a_vp->v_data; return (uiomove(de->de_symlink, strlen(de->de_symlink), ap->a_uio)); } static int devfs_reclaim(struct vop_reclaim_args *ap) { struct vnode *vp = ap->a_vp; struct devfs_dirent *de; struct cdev *dev; mtx_lock(&devfs_de_interlock); de = vp->v_data; if (de != NULL) { de->de_vnode = NULL; vp->v_data = NULL; } mtx_unlock(&devfs_de_interlock); vnode_destroy_vobject(vp); VI_LOCK(vp); dev_lock(); dev = vp->v_rdev; vp->v_rdev = NULL; if (dev == NULL) { dev_unlock(); VI_UNLOCK(vp); return (0); } dev->si_usecount -= vp->v_usecount; dev_unlock(); VI_UNLOCK(vp); dev_rel(dev); return (0); } static int devfs_remove(struct vop_remove_args *ap) { struct vnode *dvp = ap->a_dvp; struct vnode *vp = ap->a_vp; struct devfs_dirent *dd; struct devfs_dirent *de, *de_covered; struct devfs_mount *dmp = VFSTODEVFS(vp->v_mount); ASSERT_VOP_ELOCKED(dvp, "devfs_remove"); ASSERT_VOP_ELOCKED(vp, "devfs_remove"); sx_xlock(&dmp->dm_lock); dd = ap->a_dvp->v_data; de = vp->v_data; if (de->de_cdp == NULL) { TAILQ_REMOVE(&dd->de_dlist, de, de_list); if (de->de_dirent->d_type == DT_LNK) { de_covered = devfs_find(dd, de->de_dirent->d_name, de->de_dirent->d_namlen, 0); if (de_covered != NULL) de_covered->de_flags &= ~DE_COVERED; } /* We need to unlock dvp because devfs_delete() may lock it. */ VOP_UNLOCK(vp, 0); if (dvp != vp) VOP_UNLOCK(dvp, 0); devfs_delete(dmp, de, 0); sx_xunlock(&dmp->dm_lock); if (dvp != vp) vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); } else { de->de_flags |= DE_WHITEOUT; sx_xunlock(&dmp->dm_lock); } return (0); } /* * Revoke is called on a tty when a terminal session ends. The vnode * is orphaned by setting v_op to deadfs so we need to let go of it * as well so that we create a new one next time around. * */ static int devfs_revoke(struct vop_revoke_args *ap) { struct vnode *vp = ap->a_vp, *vp2; struct cdev *dev; struct cdev_priv *cdp; struct devfs_dirent *de; int i; KASSERT((ap->a_flags & REVOKEALL) != 0, ("devfs_revoke !REVOKEALL")); dev = vp->v_rdev; cdp = cdev2priv(dev); dev_lock(); cdp->cdp_inuse++; dev_unlock(); vhold(vp); vgone(vp); vdrop(vp); VOP_UNLOCK(vp,0); loop: for (;;) { mtx_lock(&devfs_de_interlock); dev_lock(); vp2 = NULL; for (i = 0; i <= cdp->cdp_maxdirent; i++) { de = cdp->cdp_dirents[i]; if (de == NULL) continue; vp2 = de->de_vnode; if (vp2 != NULL) { dev_unlock(); VI_LOCK(vp2); mtx_unlock(&devfs_de_interlock); if (vget(vp2, LK_EXCLUSIVE | LK_INTERLOCK, curthread)) goto loop; vhold(vp2); vgone(vp2); vdrop(vp2); vput(vp2); break; } } if (vp2 != NULL) { continue; } dev_unlock(); mtx_unlock(&devfs_de_interlock); break; } dev_lock(); cdp->cdp_inuse--; if (!(cdp->cdp_flags & CDP_ACTIVE) && cdp->cdp_inuse == 0) { TAILQ_REMOVE(&cdevp_list, cdp, cdp_list); dev_unlock(); dev_rel(&cdp->cdp_c); } else dev_unlock(); vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); return (0); } static int devfs_rioctl(struct vop_ioctl_args *ap) { struct vnode *vp; struct devfs_mount *dmp; int error; vp = ap->a_vp; vn_lock(vp, LK_SHARED | LK_RETRY); if (vp->v_iflag & VI_DOOMED) { VOP_UNLOCK(vp, 0); return (EBADF); } dmp = VFSTODEVFS(vp->v_mount); sx_xlock(&dmp->dm_lock); VOP_UNLOCK(vp, 0); DEVFS_DMP_HOLD(dmp); devfs_populate(dmp); if (DEVFS_DMP_DROP(dmp)) { sx_xunlock(&dmp->dm_lock); devfs_unmount_final(dmp); return (ENOENT); } error = devfs_rules_ioctl(dmp, ap->a_command, ap->a_data, ap->a_td); sx_xunlock(&dmp->dm_lock); return (error); } static int devfs_rread(struct vop_read_args *ap) { if (ap->a_vp->v_type != VDIR) return (EINVAL); return (VOP_READDIR(ap->a_vp, ap->a_uio, ap->a_cred, NULL, NULL, NULL)); } static int devfs_setattr(struct vop_setattr_args *ap) { struct devfs_dirent *de; struct vattr *vap; struct vnode *vp; struct thread *td; int c, error; uid_t uid; gid_t gid; vap = ap->a_vap; vp = ap->a_vp; td = curthread; if ((vap->va_type != VNON) || (vap->va_nlink != VNOVAL) || (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) || (vap->va_blocksize != VNOVAL) || (vap->va_flags != VNOVAL && vap->va_flags != 0) || (vap->va_rdev != VNOVAL) || ((int)vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) { return (EINVAL); } + error = devfs_populate_vp(vp); + if (error != 0) + return (error); + de = vp->v_data; if (vp->v_type == VDIR) de = de->de_dir; - error = c = 0; + c = 0; if (vap->va_uid == (uid_t)VNOVAL) uid = de->de_uid; else uid = vap->va_uid; if (vap->va_gid == (gid_t)VNOVAL) gid = de->de_gid; else gid = vap->va_gid; if (uid != de->de_uid || gid != de->de_gid) { if ((ap->a_cred->cr_uid != de->de_uid) || uid != de->de_uid || (gid != de->de_gid && !groupmember(gid, ap->a_cred))) { error = priv_check(td, PRIV_VFS_CHOWN); - if (error) - return (error); + if (error != 0) + goto ret; } de->de_uid = uid; de->de_gid = gid; c = 1; } if (vap->va_mode != (mode_t)VNOVAL) { if (ap->a_cred->cr_uid != de->de_uid) { error = priv_check(td, PRIV_VFS_ADMIN); - if (error) - return (error); + if (error != 0) + goto ret; } de->de_mode = vap->va_mode; c = 1; } if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) { error = vn_utimes_perm(vp, vap, ap->a_cred, td); if (error != 0) - return (error); + goto ret; if (vap->va_atime.tv_sec != VNOVAL) { if (vp->v_type == VCHR) vp->v_rdev->si_atime = vap->va_atime; else de->de_atime = vap->va_atime; } if (vap->va_mtime.tv_sec != VNOVAL) { if (vp->v_type == VCHR) vp->v_rdev->si_mtime = vap->va_mtime; else de->de_mtime = vap->va_mtime; } c = 1; } if (c) { if (vp->v_type == VCHR) vfs_timestamp(&vp->v_rdev->si_ctime); else vfs_timestamp(&de->de_mtime); } - return (0); + +ret: + sx_xunlock(&VFSTODEVFS(vp->v_mount)->dm_lock); + return (error); } #ifdef MAC static int devfs_setlabel(struct vop_setlabel_args *ap) { struct vnode *vp; struct devfs_dirent *de; vp = ap->a_vp; de = vp->v_data; mac_vnode_relabel(ap->a_cred, vp, ap->a_label); mac_devfs_update(vp->v_mount, de, vp); return (0); } #endif static int devfs_stat_f(struct file *fp, struct stat *sb, struct ucred *cred, struct thread *td) { return (vnops.fo_stat(fp, sb, cred, td)); } static int devfs_symlink(struct vop_symlink_args *ap) { int i, error; struct devfs_dirent *dd; struct devfs_dirent *de, *de_covered, *de_dotdot; struct devfs_mount *dmp; error = priv_check(curthread, PRIV_DEVFS_SYMLINK); if (error) return(error); dmp = VFSTODEVFS(ap->a_dvp->v_mount); if (devfs_populate_vp(ap->a_dvp) != 0) return (ENOENT); dd = ap->a_dvp->v_data; de = devfs_newdirent(ap->a_cnp->cn_nameptr, ap->a_cnp->cn_namelen); de->de_flags = DE_USER; de->de_uid = 0; de->de_gid = 0; de->de_mode = 0755; de->de_inode = alloc_unr(devfs_inos); de->de_dir = dd; de->de_dirent->d_type = DT_LNK; i = strlen(ap->a_target) + 1; de->de_symlink = malloc(i, M_DEVFS, M_WAITOK); bcopy(ap->a_target, de->de_symlink, i); #ifdef MAC mac_devfs_create_symlink(ap->a_cnp->cn_cred, dmp->dm_mount, dd, de); #endif de_covered = devfs_find(dd, de->de_dirent->d_name, de->de_dirent->d_namlen, 0); if (de_covered != NULL) { if ((de_covered->de_flags & DE_USER) != 0) { devfs_delete(dmp, de, DEVFS_DEL_NORECURSE); sx_xunlock(&dmp->dm_lock); return (EEXIST); } KASSERT((de_covered->de_flags & DE_COVERED) == 0, ("devfs_symlink: entry %p already covered", de_covered)); de_covered->de_flags |= DE_COVERED; } de_dotdot = TAILQ_FIRST(&dd->de_dlist); /* "." */ de_dotdot = TAILQ_NEXT(de_dotdot, de_list); /* ".." */ TAILQ_INSERT_AFTER(&dd->de_dlist, de_dotdot, de, de_list); devfs_dir_ref_de(dmp, dd); devfs_rules_apply(dmp, de); return (devfs_allocv(de, ap->a_dvp->v_mount, LK_EXCLUSIVE, ap->a_vpp)); } static int devfs_truncate_f(struct file *fp, off_t length, struct ucred *cred, struct thread *td) { return (vnops.fo_truncate(fp, length, cred, td)); } static int devfs_write_f(struct file *fp, struct uio *uio, struct ucred *cred, int flags, struct thread *td) { struct cdev *dev; int error, ioflag, ref; ssize_t resid; struct cdevsw *dsw; struct file *fpop; if (uio->uio_resid > DEVFS_IOSIZE_MAX) return (EINVAL); fpop = td->td_fpop; error = devfs_fp_check(fp, &dev, &dsw, &ref); if (error != 0) { error = vnops.fo_write(fp, uio, cred, flags, td); return (error); } KASSERT(uio->uio_td == td, ("uio_td %p is not td %p", uio->uio_td, td)); ioflag = fp->f_flag & (O_NONBLOCK | O_DIRECT | O_FSYNC); if (ioflag & O_DIRECT) ioflag |= IO_DIRECT; foffset_lock_uio(fp, uio, flags | FOF_NOLOCK); resid = uio->uio_resid; error = dsw->d_write(dev, uio, ioflag); if (uio->uio_resid != resid || (error == 0 && resid != 0)) { devfs_timestamp(&dev->si_ctime); dev->si_mtime = dev->si_ctime; } td->td_fpop = fpop; dev_relthread(dev, ref); foffset_unlock_uio(fp, uio, flags | FOF_NOLOCK | FOF_NEXTOFF); return (error); } dev_t dev2udev(struct cdev *x) { if (x == NULL) return (NODEV); return (cdev2priv(x)->cdp_inode); } static struct fileops devfs_ops_f = { .fo_read = devfs_read_f, .fo_write = devfs_write_f, .fo_truncate = devfs_truncate_f, .fo_ioctl = devfs_ioctl_f, .fo_poll = devfs_poll_f, .fo_kqfilter = devfs_kqfilter_f, .fo_stat = devfs_stat_f, .fo_close = devfs_close_f, .fo_chmod = vn_chmod, .fo_chown = vn_chown, .fo_sendfile = vn_sendfile, .fo_seek = vn_seek, .fo_flags = DFLAG_PASSABLE | DFLAG_SEEKABLE }; static struct vop_vector devfs_vnodeops = { .vop_default = &default_vnodeops, .vop_access = devfs_access, .vop_getattr = devfs_getattr, .vop_ioctl = devfs_rioctl, .vop_lookup = devfs_lookup, .vop_mknod = devfs_mknod, .vop_pathconf = devfs_pathconf, .vop_read = devfs_rread, .vop_readdir = devfs_readdir, .vop_readlink = devfs_readlink, .vop_reclaim = devfs_reclaim, .vop_remove = devfs_remove, .vop_revoke = devfs_revoke, .vop_setattr = devfs_setattr, #ifdef MAC .vop_setlabel = devfs_setlabel, #endif .vop_symlink = devfs_symlink, .vop_vptocnp = devfs_vptocnp, }; static struct vop_vector devfs_specops = { .vop_default = &default_vnodeops, .vop_access = devfs_access, .vop_bmap = VOP_PANIC, .vop_close = devfs_close, .vop_create = VOP_PANIC, .vop_fsync = devfs_fsync, .vop_getattr = devfs_getattr, .vop_link = VOP_PANIC, .vop_mkdir = VOP_PANIC, .vop_mknod = VOP_PANIC, .vop_open = devfs_open, .vop_pathconf = devfs_pathconf, .vop_poll = dead_poll, .vop_print = devfs_print, .vop_read = dead_read, .vop_readdir = VOP_PANIC, .vop_readlink = VOP_PANIC, .vop_reallocblks = VOP_PANIC, .vop_reclaim = devfs_reclaim, .vop_remove = devfs_remove, .vop_rename = VOP_PANIC, .vop_revoke = devfs_revoke, .vop_rmdir = VOP_PANIC, .vop_setattr = devfs_setattr, #ifdef MAC .vop_setlabel = devfs_setlabel, #endif .vop_strategy = VOP_PANIC, .vop_symlink = VOP_PANIC, .vop_vptocnp = devfs_vptocnp, .vop_write = dead_write, }; /* * Our calling convention to the device drivers used to be that we passed * vnode.h IO_* flags to read()/write(), but we're moving to fcntl.h O_ * flags instead since that's what open(), close() and ioctl() takes and * we don't really want vnode.h in device drivers. * We solved the source compatibility by redefining some vnode flags to * be the same as the fcntl ones and by sending down the bitwise OR of * the respective fcntl/vnode flags. These CTASSERTS make sure nobody * pulls the rug out under this. */ CTASSERT(O_NONBLOCK == IO_NDELAY); CTASSERT(O_FSYNC == IO_SYNC); Index: stable/10 =================================================================== --- stable/10 (revision 292874) +++ stable/10 (revision 292875) Property changes on: stable/10 ___________________________________________________________________ Modified: svn:mergeinfo ## -0,0 +0,1 ## Merged /head:r292621