/*- * SPDX-License-Identifier: BSD-2-Clause-FreeBSD * * Copyright (c) 1992, 1993 * The Regents of the University of California. All rights reserved. * Copyright (c) 2000 * Poul-Henning Kamp. All rights reserved. * Copyright (c) 2002 * Dima Dorfman. 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.h 8.6 (Berkeley) 3/29/95 * From: FreeBSD: src/sys/miscfs/kernfs/kernfs.h 1.14 * * $FreeBSD$ */ #ifndef _FS_DEVFS_DEVFS_H_ #define _FS_DEVFS_DEVFS_H_ #define DEVFS_MAGIC 0xdb0a087a /* * Identifiers. The ruleset and rule numbers are 16-bit values. The * "rule ID" is a combination of the ruleset and rule number; it * should be able to univocally describe a rule in the system. In * this implementation, the upper 16 bits of the rule ID is the * ruleset number; the lower 16 bits, the rule number within the * aforementioned ruleset. */ typedef uint16_t devfs_rnum; typedef uint16_t devfs_rsnum; typedef uint32_t devfs_rid; /* * Identifier manipulators. */ #define rid2rsn(rid) ((rid) >> 16) #define rid2rn(rid) ((rid) & 0xffff) #define mkrid(rsn, rn) ((rn) | ((rsn) << 16)) /* * Plain DEVFS rule. This gets shared between kernel and userland * verbatim, so it shouldn't contain any pointers or other kernel- or * userland-specific values. */ struct devfs_rule { uint32_t dr_magic; /* Magic number. */ devfs_rid dr_id; /* Identifier. */ /* * Conditions under which this rule should be applied. These * are ANDed together since OR can be simulated by using * multiple rules. dr_icond determines which of the other * variables we should process. */ int dr_icond; #define DRC_DSWFLAGS 0x001 #define DRC_PATHPTRN 0x002 int dr_dswflags; /* cdevsw flags to match. */ #define DEVFS_MAXPTRNLEN 200 char dr_pathptrn[DEVFS_MAXPTRNLEN]; /* Pattern to match path. */ /* * Things to change. dr_iacts determines which of the other * variables we should process. */ int dr_iacts; #define DRA_BACTS 0x001 #define DRA_UID 0x002 #define DRA_GID 0x004 #define DRA_MODE 0x008 #define DRA_INCSET 0x010 int dr_bacts; /* Boolean (on/off) action. */ #define DRB_HIDE 0x001 /* Hide entry (DE_WHITEOUT). */ #define DRB_UNHIDE 0x002 /* Unhide entry. */ uid_t dr_uid; gid_t dr_gid; mode_t dr_mode; devfs_rsnum dr_incset; /* Included ruleset. */ }; /* * Rule-related ioctls. */ #define DEVFSIO_RADD _IOWR('D', 0, struct devfs_rule) #define DEVFSIO_RDEL _IOW('D', 1, devfs_rid) #define DEVFSIO_RAPPLY _IOW('D', 2, struct devfs_rule) #define DEVFSIO_RAPPLYID _IOW('D', 3, devfs_rid) #define DEVFSIO_RGETNEXT _IOWR('D', 4, struct devfs_rule) #define DEVFSIO_SUSE _IOW('D', 10, devfs_rsnum) #define DEVFSIO_SAPPLY _IOW('D', 11, devfs_rsnum) #define DEVFSIO_SGETNEXT _IOWR('D', 12, devfs_rsnum) /* XXX: DEVFSIO_RS_GET_INFO for refcount, active if any, etc. */ #ifdef _KERNEL #ifdef MALLOC_DECLARE MALLOC_DECLARE(M_DEVFS); #endif struct componentname; TAILQ_HEAD(devfs_dlist_head, devfs_dirent); struct devfs_dirent { struct cdev_priv *de_cdp; int de_inode; int de_flags; #define DE_WHITEOUT 0x01 #define DE_DOT 0x02 #define DE_DOTDOT 0x04 #define DE_DOOMED 0x08 #define DE_COVERED 0x10 #define DE_USER 0x20 int de_holdcnt; struct dirent *de_dirent; TAILQ_ENTRY(devfs_dirent) de_list; struct devfs_dlist_head de_dlist; struct devfs_dirent *de_dir; int de_links; mode_t de_mode; uid_t de_uid; gid_t de_gid; struct label *de_label; struct timespec de_atime; struct timespec de_mtime; struct timespec de_ctime; struct vnode *de_vnode; char *de_symlink; int de_usecount; }; struct devfs_mount { u_int dm_idx; struct mount *dm_mount; struct devfs_dirent *dm_rootdir; unsigned dm_generation; int dm_holdcnt; struct sx dm_lock; devfs_rsnum dm_ruleset; }; #define DEVFS_ROOTINO 2 extern unsigned devfs_rule_depth; #define VFSTODEVFS(mp) ((struct devfs_mount *)((mp)->mnt_data)) #define DEVFS_DE_HOLD(de) ((de)->de_holdcnt++) #define DEVFS_DE_DROP(de) (--(de)->de_holdcnt == 0) #define DEVFS_DMP_HOLD(dmp) ((dmp)->dm_holdcnt++) #define DEVFS_DMP_DROP(dmp) (--(dmp)->dm_holdcnt == 0) #define DEVFS_DEL_VNLOCKED 0x01 #define DEVFS_DEL_NORECURSE 0x02 void devfs_rules_apply(struct devfs_mount *, struct devfs_dirent *); void devfs_rules_cleanup(struct devfs_mount *); int devfs_rules_ioctl(struct devfs_mount *, u_long, caddr_t, struct thread *); void devfs_ruleset_set(devfs_rsnum rsnum, struct devfs_mount *dm); void devfs_ruleset_apply(struct devfs_mount *dm); int devfs_allocv(struct devfs_dirent *, struct mount *, int, struct vnode **); char *devfs_fqpn(char *, struct devfs_mount *, struct devfs_dirent *, struct componentname *); void devfs_delete(struct devfs_mount *, struct devfs_dirent *, int); void devfs_dirent_free(struct devfs_dirent *); int devfs_populate_needed(struct devfs_mount *dm); void devfs_populate(struct devfs_mount *); void devfs_cleanup(struct devfs_mount *); void devfs_unmount_final(struct devfs_mount *); struct devfs_dirent *devfs_newdirent(char *, int); struct devfs_dirent *devfs_parent_dirent(struct devfs_dirent *); struct devfs_dirent *devfs_vmkdir(struct devfs_mount *, char *, int, struct devfs_dirent *, u_int); struct devfs_dirent *devfs_find(struct devfs_dirent *, const char *, int, int); void devfs_ctty_ref(struct vnode *); void devfs_ctty_unref(struct vnode *); int devfs_usecount(struct vnode *); #endif /* _KERNEL */ #endif /* !_FS_DEVFS_DEVFS_H_ */