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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#ifndef _SYS_DV_NODE_H
#define _SYS_DV_NODE_H
/*
* dv_nodes are the file-system specific part of the
* vnodes for the device filesystem.
*
* The device filesystem exports two node types:
*
* VDIR nodes to represent nexus drivers
* VCHR & VBLK nodes to represent devices
*/
#include <sys/dirent.h>
#include <sys/sunddi.h>
#include <sys/devops.h>
#include <sys/ddi_impldefs.h>
#include <sys/fs/sdev_impl.h>
#include <sys/devpolicy.h>
#include <sys/avl.h>
#ifdef _KERNEL
#include <sys/vfs_opreg.h>
#endif
#ifdef __cplusplus
extern "C" {
#endif
#ifdef _KERNEL
/*
* Here's the focal point of this filesystem
*/
typedef struct dv_node {
char *dv_name; /* pointer to name */
size_t dv_namelen; /* strlen(dv_name) */
struct vnode *dv_vnode; /* vnode for this dv_node */
/*
* The dv_contents lock should be held (read) before looking at
* any of the fields below, and held (write) before modifying them.
*/
krwlock_t dv_contents; /* held while anything is changing */
dev_info_t *dv_devi; /* VDIR: underlying devinfo node */
/* has ndi_devi_hold on device */
struct dv_node *dv_dotdot; /* parent: my parent dv_node */
avl_tree_t dv_entries; /* VDIR: contents as avl tree */
avl_node_t dv_avllink; /* avl node linkage */
struct vnode *dv_attrvp; /* persistent attribute store */
struct vattr *dv_attr; /* attributes not yet persistent */
ino64_t dv_ino; /* fake inode */
int dv_flags; /* state bits and stuff */
uint_t dv_nlink; /* link count */
uint_t dv_busy; /* directory busy count */
devplcy_t *dv_priv; /* access privilege */
mode_t dv_dflt_mode; /* create_priv_minor_node mode */
struct sdev_dv *dv_sdev; /* sdev node[s] if exists */
} dvnode_t;
#define DV_BUILD 0x1 /* directory out-of-date */
#define DV_NO_FSPERM 0x2 /* ignore fs permissions */
#define DV_INTERNAL 0x04 /* internal node */
#define DV_ACL 0x08 /* node has acl */
#define DV_DFLT_MODE 0x010 /* dv_dflt_mode set */
#define DV_ROOTINO ((ino_t)2) /* root inode no. for devfs */
#define DVTOV(n) ((struct vnode *)(n)->dv_vnode)
#define VTODV(vp) ((struct dv_node *)(vp)->v_data)
#define DV_STALE(dv) (dv->dv_devi == NULL)
#define DV_UID_DEFAULT 0 /* default uid for devs and dirs */
#define DV_GID_DEFAULT 3 /* default gid for devs and dirs */
#define DV_DIRMODE_DEFAULT (S_IFDIR | 0755) /* directories */
#define DV_DEVMODE_DEFAULT (0600) /* special files */
#define DV_DEVMODE_PRIV (0666) /* priv based access only */
/* flags for devfs_clean() */
#define DV_CLEAN_FORCE 0x01 /* force clean of refed directories */
#define DV_RESET_PERM 0x02 /* force resetting of node permission */
#define DV_CLEANDIR_LCK 0x04 /* dv_contents already held */
struct devfs_data {
struct dv_node *devfs_root;
struct vfs *devfs_vfsp;
};
#define VFSTODVFS(vfsp) ((struct devfs_data *)((vfsp)->vfs_data))
/* dv_fid overlays the fid structure (for VFS_VGET) */
struct dv_fid {
uint16_t dvfid_len;
ino32_t dvfid_ino;
int32_t dvfid_gen;
};
/*
* Compare a vattr's and mperm_t's minor permissions (uid, gid & mode)
*/
#define VATTRP_MP_CMP(attrp, mp) \
(!((attrp->va_uid == mp.mp_uid) && \
(attrp->va_gid == mp.mp_gid) && \
((attrp->va_mode & S_IAMB) == (mp.mp_mode & S_IAMB))))
/*
* Merge an mperm_t's minor permissions into a vattr
*/
#define VATTR_MP_MERGE(attr, mp) \
attr.va_uid = mp.mp_uid; \
attr.va_gid = mp.mp_gid; \
attr.va_mode = \
(attr.va_mode & ~S_IAMB) | (mp.mp_mode & S_IAMB);
#define VATTRP_MP_MERGE(attrp, mp) \
attrp->va_uid = mp.mp_uid; \
attrp->va_gid = mp.mp_gid; \
attrp->va_mode = \
(attrp->va_mode & ~S_IAMB) | (mp.mp_mode & S_IAMB);
/*
* dv_shadow_node flags
*/
#define DV_SHADOW_CREATE 0x01 /* create attribute node */
#define DV_SHADOW_WRITE_HELD 0x02 /* dv_contents write held */
/*
* Directory tree traversal
*/
#define DV_FIRST_ENTRY(ddv) avl_first(&(ddv)->dv_entries)
#define DV_NEXT_ENTRY(ddv, dv) AVL_NEXT(&(ddv)->dv_entries, (dv))
extern uint_t devfs_clean_key; /* tsd key */
extern const char dvnm[]; /* share some space.. */
extern struct dv_node *dvroot; /* devfs root node */
extern void dv_node_cache_init(void);
extern void dv_node_cache_fini(void);
extern struct dv_node *dv_mkdir(struct dv_node *, dev_info_t *, char *);
extern struct dv_node *dv_mkroot(struct vfs *, dev_t);
extern void dv_destroy(struct dv_node *, uint_t);
extern void dv_insert(struct dv_node *, struct dv_node *);
extern void dv_shadow_node(struct vnode *, char *nm, struct vnode *,
struct pathname *, struct vnode *, struct cred *, int);
extern int dv_find(struct dv_node *, char *, struct vnode **,
struct pathname *, struct vnode *, struct cred *, uint_t);
extern void dv_filldir(struct dv_node *);
extern int dv_cleandir(struct dv_node *, char *, uint_t);
extern void dv_vattr_merge(struct dv_node *, struct vattr *);
extern void dv_walk(struct dv_node *, char *,
void (*f)(struct dv_node *, void *), void *);
extern int devfs_clean(dev_info_t *, char *, uint_t);
extern int devfs_lookupname(char *, vnode_t **, vnode_t **);
extern int devfs_walk(char *, void (*f)(struct dv_node *, void *), void *);
extern int devfs_devpolicy(vnode_t *, devplcy_t **);
extern void devfs_get_defattr(vnode_t *, struct vattr *, int *);
extern struct dv_node *devfs_dip_to_dvnode(dev_info_t *);
extern int devfs_reset_perm(uint_t);
extern int devfs_remdrv_cleanup(const char *, const char *);
extern struct vnodeops *dv_vnodeops;
extern const struct fs_operation_def dv_vnodeops_template[];
#ifdef DEBUG
extern int devfs_debug;
#define DV_DEBUG 0x01
#define DV_DEBUG2 0x02
#define DV_DEBUG3 0x04
#define DV_DEBUG4 0x08
#define DV_DEBUG5 0x10
#define DV_SYSERR 0x1000
#define DV_SYSTRACE 0x2000
#define dcmn_err(args) if (devfs_debug & DV_DEBUG) printf args
#define dcmn_err2(args) if (devfs_debug & DV_DEBUG2) printf args
#define dcmn_err3(args) if (devfs_debug & DV_DEBUG3) printf args
#define dcmn_err4(args) if (devfs_debug & DV_DEBUG4) printf args
#define dcmn_err5(args) if (devfs_debug & DV_DEBUG5) printf args
#define dsysdebug(err, args) \
if ((err && (devfs_debug & DV_SYSERR)) || \
(devfs_debug & DV_SYSTRACE)) printf args
#else
#define dcmn_err(args) /* nothing */
#define dcmn_err2(args) /* nothing */
#define dcmn_err3(args) /* nothing */
#define dcmn_err4(args) /* nothing */
#define dcmn_err5(args) /* nothing */
#define dsysdebug(err, args) /* nothing */
#endif
#endif /* _KERNEL */
#ifdef __cplusplus
}
#endif
#endif /* _SYS_DV_NODE_H */
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