1 files changed, 87 insertions, 1 deletions

diff --git a/sys/fs/devfs/devfs.h b/sys/fs/devfs/devfs.h
index 137797f4c8dbf..2f0dc762018b2 100644
--- a/sys/fs/devfs/devfs.h
+++ b/sys/fs/devfs/devfs.h
@@ -3,6 +3,8 @@
  *	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.
@@ -37,7 +39,86 @@
 #ifndef _FS_DEVFS_DEVFS_H_
 #define	_FS_DEVFS_DEVFS_H_
 
-#ifdef _KERNEL	/* No userland stuff in here... */
+#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
+#define	DRC_MAJOR	0x004
+	int	dr_dswflags;			/* cdevsw flags to match. */
+#define	DEVFS_MAXPTRNLEN	200
+	char	dr_pathptrn[DEVFS_MAXPTRNLEN];	/* Pattern to match path. */
+	int	dr_major;			/* Device major number. */
+
+	/*
+	 * 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
 
 /*
  * These are default sizes for the DEVFS inode table and the overflow
@@ -94,6 +175,7 @@ struct devfs_mount {
 	struct devfs_dirent **dm_overflow;
 	int	dm_inode;
 	struct lock dm_lock;
+	devfs_rsnum dm_ruleset;
 };
 
 /*
@@ -106,6 +188,10 @@ struct devfs_mount {
 extern vop_t **devfs_vnodeop_p;
 extern vop_t **devfs_specop_p;
 
+void devfs_rules_apply(struct devfs_mount *dm, struct devfs_dirent *de);
+void devfs_rules_init(void);
+int devfs_rules_ioctl(struct mount *mp, int cmd, caddr_t data, struct thread *td);
+void devfs_rules_newmount(struct devfs_mount *dm, struct thread *td);
 int devfs_allocv (struct devfs_dirent *de, struct mount *mp, struct vnode **vpp, struct thread *td);
 dev_t *devfs_itod (int inode);
 struct devfs_dirent **devfs_itode (struct devfs_mount *dm, int inode);