692 lines
24 KiB
C
692 lines
24 KiB
C
/*-
|
|
* Copyright (c) 1989, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* 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. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 4. 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.
|
|
*
|
|
* @(#)vnode.h 8.7 (Berkeley) 2/4/94
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#ifndef _SYS_VNODE_H_
|
|
#define _SYS_VNODE_H_
|
|
|
|
/*
|
|
* XXX - compatability until lockmgr() goes away or all the #includes are
|
|
* updated.
|
|
*/
|
|
#include <sys/lockmgr.h>
|
|
|
|
#include <sys/bufobj.h>
|
|
#include <sys/queue.h>
|
|
#include <sys/_lock.h>
|
|
#include <sys/lock.h>
|
|
#include <sys/_mutex.h>
|
|
#include <sys/mutex.h>
|
|
#include <sys/selinfo.h>
|
|
#include <sys/uio.h>
|
|
#include <sys/acl.h>
|
|
#include <sys/ktr.h>
|
|
|
|
/*
|
|
* The vnode is the focus of all file activity in UNIX. There is a
|
|
* unique vnode allocated for each active file, each current directory,
|
|
* each mounted-on file, text file, and the root.
|
|
*/
|
|
|
|
/*
|
|
* Vnode types. VNON means no type.
|
|
*/
|
|
enum vtype { VNON, VREG, VDIR, VBLK, VCHR, VLNK, VSOCK, VFIFO, VBAD };
|
|
|
|
/*
|
|
* Each underlying filesystem allocates its own private area and hangs
|
|
* it from v_data. If non-null, this area is freed in getnewvnode().
|
|
*/
|
|
|
|
struct namecache;
|
|
|
|
struct vpollinfo {
|
|
struct mtx vpi_lock; /* lock to protect below */
|
|
struct selinfo vpi_selinfo; /* identity of poller(s) */
|
|
short vpi_events; /* what they are looking for */
|
|
short vpi_revents; /* what has happened */
|
|
};
|
|
|
|
/*
|
|
* Reading or writing any of these items requires holding the appropriate lock.
|
|
*
|
|
* Lock reference:
|
|
* c - namecache mutex
|
|
* f - freelist mutex
|
|
* G - Giant
|
|
* i - interlock
|
|
* m - mntvnodes mutex
|
|
* p - pollinfo lock
|
|
* s - spechash mutex
|
|
* S - syncer mutex
|
|
* u - Only a reference to the vnode is needed to read.
|
|
* v - vnode lock
|
|
*
|
|
* Vnodes may be found on many lists. The general way to deal with operating
|
|
* on a vnode that is on a list is:
|
|
* 1) Lock the list and find the vnode.
|
|
* 2) Lock interlock so that the vnode does not go away.
|
|
* 3) Unlock the list to avoid lock order reversals.
|
|
* 4) vget with LK_INTERLOCK and check for ENOENT, or
|
|
* 5) Check for XLOCK if the vnode lock is not required.
|
|
* 6) Perform your operation, then vput().
|
|
*
|
|
* XXX Not all fields are locked yet and some fields that are marked are not
|
|
* locked consistently. This is a work in progress. Requires Giant!
|
|
*/
|
|
|
|
#if defined(_KERNEL) || defined(_KVM_VNODE)
|
|
|
|
struct vnode {
|
|
struct mtx v_interlock; /* lock for "i" things */
|
|
u_long v_iflag; /* i vnode flags (see below) */
|
|
int v_usecount; /* i ref count of users */
|
|
struct thread *v_vxthread; /* i thread owning VXLOCK */
|
|
int v_holdcnt; /* i page & buffer references */
|
|
struct bufobj v_bufobj; /* * Buffer cache object */
|
|
u_long v_vflag; /* v vnode flags */
|
|
int v_writecount; /* v ref count of writers */
|
|
daddr_t v_lastw; /* v last write (write cluster) */
|
|
daddr_t v_cstart; /* v start block of cluster */
|
|
daddr_t v_lasta; /* v last allocation (cluster) */
|
|
int v_clen; /* v length of current cluster */
|
|
union {
|
|
struct mount *vu_mountedhere;/* v ptr to mounted vfs (VDIR) */
|
|
struct socket *vu_socket; /* v unix ipc (VSOCK) */
|
|
struct {
|
|
struct cdev *vu_cdev; /* v device (VCHR, VBLK) */
|
|
SLIST_ENTRY(vnode) vu_specnext; /* s device aliases */
|
|
} vu_spec;
|
|
struct fifoinfo *vu_fifoinfo; /* v fifo (VFIFO) */
|
|
} v_un;
|
|
TAILQ_ENTRY(vnode) v_freelist; /* f vnode freelist */
|
|
TAILQ_ENTRY(vnode) v_nmntvnodes; /* m vnodes for mount point */
|
|
enum vtype v_type; /* u vnode type */
|
|
const char *v_tag; /* u type of underlying data */
|
|
void *v_data; /* u private data for fs */
|
|
struct lock v_lock; /* u used if fs don't have one */
|
|
struct lock *v_vnlock; /* u pointer to vnode lock */
|
|
struct vop_vector *v_op; /* u vnode operations vector */
|
|
struct mount *v_mount; /* u ptr to vfs we are in */
|
|
LIST_HEAD(, namecache) v_cache_src; /* c Cache entries from us */
|
|
TAILQ_HEAD(, namecache) v_cache_dst; /* c Cache entries to us */
|
|
u_long v_id; /* c capability identifier */
|
|
struct vnode *v_dd; /* c .. vnode */
|
|
u_long v_ddid; /* c .. capability identifier */
|
|
struct vpollinfo *v_pollinfo; /* G Poll events, p for *v_pi */
|
|
struct label *v_label; /* MAC label for vnode */
|
|
#ifdef DEBUG_LOCKS
|
|
const char *filename; /* Source file doing locking */
|
|
int line; /* Line number doing locking */
|
|
#endif
|
|
};
|
|
|
|
#endif /* defined(_KERNEL) || defined(_KVM_VNODE) */
|
|
|
|
#define v_mountedhere v_un.vu_mountedhere
|
|
#define v_socket v_un.vu_socket
|
|
#define v_rdev v_un.vu_spec.vu_cdev
|
|
#define v_specnext v_un.vu_spec.vu_specnext
|
|
#define v_fifoinfo v_un.vu_fifoinfo
|
|
|
|
/* XXX: These are temporary to avoid a source sweep at this time */
|
|
#define v_object v_bufobj.bo_object
|
|
|
|
/*
|
|
* Userland version of struct vnode, for sysctl.
|
|
*/
|
|
struct xvnode {
|
|
size_t xv_size; /* sizeof(struct xvnode) */
|
|
void *xv_vnode; /* address of real vnode */
|
|
u_long xv_flag; /* vnode vflags */
|
|
int xv_usecount; /* reference count of users */
|
|
int xv_writecount; /* reference count of writers */
|
|
int xv_holdcnt; /* page & buffer references */
|
|
u_long xv_id; /* capability identifier */
|
|
void *xv_mount; /* address of parent mount */
|
|
long xv_numoutput; /* num of writes in progress */
|
|
enum vtype xv_type; /* vnode type */
|
|
union {
|
|
void *xvu_socket; /* socket, if VSOCK */
|
|
void *xvu_fifo; /* fifo, if VFIFO */
|
|
dev_t xvu_rdev; /* maj/min, if VBLK/VCHR */
|
|
struct {
|
|
dev_t xvu_dev; /* device, if VDIR/VREG/VLNK */
|
|
ino_t xvu_ino; /* id, if VDIR/VREG/VLNK */
|
|
} xv_uns;
|
|
} xv_un;
|
|
};
|
|
#define xv_socket xv_un.xvu_socket
|
|
#define xv_fifo xv_un.xvu_fifo
|
|
#define xv_rdev xv_un.xvu_rdev
|
|
#define xv_dev xv_un.xv_uns.xvu_dev
|
|
#define xv_ino xv_un.xv_uns.xvu_ino
|
|
|
|
#define VN_KNOTE(vp, b, a) \
|
|
do { \
|
|
if ((vp)->v_pollinfo != NULL) \
|
|
KNOTE(&vp->v_pollinfo->vpi_selinfo.si_note, (b), (a)); \
|
|
} while (0)
|
|
#define VN_KNOTE_LOCKED(vp, b) VN_KNOTE(vp, b, 1)
|
|
#define VN_KNOTE_UNLOCKED(vp, b) VN_KNOTE(vp, b, 0)
|
|
|
|
/*
|
|
* Vnode flags.
|
|
* VI flags are protected by interlock and live in v_iflag
|
|
* VV flags are protected by the vnode lock and live in v_vflag
|
|
*/
|
|
#define VI_XLOCK 0x0001 /* vnode is locked to change vtype */
|
|
#define VI_XWANT 0x0002 /* thread is waiting for vnode */
|
|
#define VI_OLOCK 0x0008 /* vnode is locked waiting for an object */
|
|
#define VI_OWANT 0x0010 /* a thread is waiting for VOLOCK */
|
|
#define VI_MOUNT 0x0020 /* Mount in progress */
|
|
#define VI_AGE 0x0040 /* Insert vnode at head of free list */
|
|
#define VI_DOOMED 0x0080 /* This vnode is being recycled */
|
|
#define VI_FREE 0x0100 /* This vnode is on the freelist */
|
|
#define VI_OBJDIRTY 0x0400 /* object might be dirty */
|
|
#define VI_DOINGINACT 0x0800 /* VOP_INACTIVE is in progress */
|
|
|
|
#define VV_ROOT 0x0001 /* root of its filesystem */
|
|
#define VV_ISTTY 0x0002 /* vnode represents a tty */
|
|
#define VV_NOSYNC 0x0004 /* unlinked, stop syncing */
|
|
#define VV_CACHEDLABEL 0x0010 /* Vnode has valid cached MAC label */
|
|
#define VV_TEXT 0x0020 /* vnode is a pure text prototype */
|
|
#define VV_COPYONWRITE 0x0040 /* vnode is doing copy-on-write */
|
|
#define VV_SYSTEM 0x0080 /* vnode being used by kernel */
|
|
#define VV_PROCDEP 0x0100 /* vnode is process dependent */
|
|
|
|
/*
|
|
* Vnode attributes. A field value of VNOVAL represents a field whose value
|
|
* is unavailable (getattr) or which is not to be changed (setattr).
|
|
*/
|
|
struct vattr {
|
|
enum vtype va_type; /* vnode type (for create) */
|
|
u_short va_mode; /* files access mode and type */
|
|
short va_nlink; /* number of references to file */
|
|
uid_t va_uid; /* owner user id */
|
|
gid_t va_gid; /* owner group id */
|
|
dev_t va_fsid; /* filesystem id */
|
|
long va_fileid; /* file id */
|
|
u_quad_t va_size; /* file size in bytes */
|
|
long va_blocksize; /* blocksize preferred for i/o */
|
|
struct timespec va_atime; /* time of last access */
|
|
struct timespec va_mtime; /* time of last modification */
|
|
struct timespec va_ctime; /* time file changed */
|
|
struct timespec va_birthtime; /* time file created */
|
|
u_long va_gen; /* generation number of file */
|
|
u_long va_flags; /* flags defined for file */
|
|
dev_t va_rdev; /* device the special file represents */
|
|
u_quad_t va_bytes; /* bytes of disk space held by file */
|
|
u_quad_t va_filerev; /* file modification number */
|
|
u_int va_vaflags; /* operations flags, see below */
|
|
long va_spare; /* remain quad aligned */
|
|
};
|
|
|
|
/*
|
|
* Flags for va_vaflags.
|
|
*/
|
|
#define VA_UTIMES_NULL 0x01 /* utimes argument was NULL */
|
|
#define VA_EXCLUSIVE 0x02 /* exclusive create request */
|
|
|
|
/*
|
|
* Flags for ioflag. (high 16 bits used to ask for read-ahead and
|
|
* help with write clustering)
|
|
* NB: IO_NDELAY and IO_DIRECT are linked to fcntl.h
|
|
*/
|
|
#define IO_UNIT 0x0001 /* do I/O as atomic unit */
|
|
#define IO_APPEND 0x0002 /* append write to end */
|
|
#define IO_NDELAY 0x0004 /* FNDELAY flag set in file table */
|
|
#define IO_NODELOCKED 0x0008 /* underlying node already locked */
|
|
#define IO_ASYNC 0x0010 /* bawrite rather then bdwrite */
|
|
#define IO_VMIO 0x0020 /* data already in VMIO space */
|
|
#define IO_INVAL 0x0040 /* invalidate after I/O */
|
|
#define IO_SYNC 0x0080 /* do I/O synchronously */
|
|
#define IO_DIRECT 0x0100 /* attempt to bypass buffer cache */
|
|
#define IO_EXT 0x0400 /* operate on external attributes */
|
|
#define IO_NORMAL 0x0800 /* operate on regular data */
|
|
#define IO_NOMACCHECK 0x1000 /* MAC checks unnecessary */
|
|
|
|
#define IO_SEQMAX 0x7F /* seq heuristic max value */
|
|
#define IO_SEQSHIFT 16 /* seq heuristic in upper 16 bits */
|
|
|
|
/*
|
|
* Modes. Some values same as Ixxx entries from inode.h for now.
|
|
*/
|
|
#define VEXEC 000100 /* execute/search permission */
|
|
#define VWRITE 000200 /* write permission */
|
|
#define VREAD 000400 /* read permission */
|
|
#define VSVTX 001000 /* save swapped text even after use */
|
|
#define VSGID 002000 /* set group id on execution */
|
|
#define VSUID 004000 /* set user id on execution */
|
|
#define VADMIN 010000 /* permission to administer */
|
|
#define VSTAT 020000 /* permission to retrieve attrs */
|
|
#define VAPPEND 040000 /* permission to write/append */
|
|
#define VALLPERM (VEXEC | VWRITE | VREAD | VADMIN | VSTAT | VAPPEND)
|
|
|
|
/*
|
|
* Token indicating no attribute value yet assigned.
|
|
*/
|
|
#define VNOVAL (-1)
|
|
|
|
/*
|
|
* LK_TIMELOCK timeout for vnode locks (used mainly by the pageout daemon)
|
|
*/
|
|
#define VLKTIMEOUT (hz / 20 + 1)
|
|
|
|
#ifdef _KERNEL
|
|
|
|
#ifdef MALLOC_DECLARE
|
|
MALLOC_DECLARE(M_VNODE);
|
|
#endif
|
|
|
|
/*
|
|
* Convert between vnode types and inode formats (since POSIX.1
|
|
* defines mode word of stat structure in terms of inode formats).
|
|
*/
|
|
extern enum vtype iftovt_tab[];
|
|
extern int vttoif_tab[];
|
|
#define IFTOVT(mode) (iftovt_tab[((mode) & S_IFMT) >> 12])
|
|
#define VTTOIF(indx) (vttoif_tab[(int)(indx)])
|
|
#define MAKEIMODE(indx, mode) (int)(VTTOIF(indx) | (mode))
|
|
|
|
/*
|
|
* Flags to various vnode functions.
|
|
*/
|
|
#define SKIPSYSTEM 0x0001 /* vflush: skip vnodes marked VSYSTEM */
|
|
#define FORCECLOSE 0x0002 /* vflush: force file closure */
|
|
#define WRITECLOSE 0x0004 /* vflush: only close writable files */
|
|
#define DOCLOSE 0x0008 /* vclean: close active files */
|
|
#define V_SAVE 0x0001 /* vinvalbuf: sync file first */
|
|
#define V_ALT 0x0002 /* vinvalbuf: invalidate only alternate bufs */
|
|
#define V_NORMAL 0x0004 /* vinvalbuf: invalidate only regular bufs */
|
|
#define REVOKEALL 0x0001 /* vop_revoke: revoke all aliases */
|
|
#define V_WAIT 0x0001 /* vn_start_write: sleep for suspend */
|
|
#define V_NOWAIT 0x0002 /* vn_start_write: don't sleep for suspend */
|
|
#define V_XSLEEP 0x0004 /* vn_start_write: just return after sleep */
|
|
|
|
#define VREF(vp) vref(vp)
|
|
|
|
#ifdef DIAGNOSTIC
|
|
#define VATTR_NULL(vap) vattr_null(vap)
|
|
#else
|
|
#define VATTR_NULL(vap) (*(vap) = va_null) /* initialize a vattr */
|
|
#endif /* DIAGNOSTIC */
|
|
|
|
#define NULLVP ((struct vnode *)NULL)
|
|
|
|
/*
|
|
* Global vnode data.
|
|
*/
|
|
extern struct vnode *rootvnode; /* root (i.e. "/") vnode */
|
|
extern int async_io_version; /* 0 or POSIX version of AIO i'face */
|
|
extern int desiredvnodes; /* number of vnodes desired */
|
|
extern struct uma_zone *namei_zone;
|
|
extern int prtactive; /* nonzero to call vprint() */
|
|
extern struct vattr va_null; /* predefined null vattr structure */
|
|
|
|
/*
|
|
* Macro/function to check for client cache inconsistency w.r.t. leasing.
|
|
*/
|
|
#define LEASE_READ 0x1 /* Check lease for readers */
|
|
#define LEASE_WRITE 0x2 /* Check lease for modifiers */
|
|
|
|
extern void (*lease_updatetime)(int deltat);
|
|
|
|
/* Requires interlock. */
|
|
#define VCANRECYCLE(vp) \
|
|
(!((vp)->v_iflag & (VI_DOOMED|VI_DOINGINACT|VI_XLOCK)) && \
|
|
((vp)->v_iflag & VI_FREE) && \
|
|
!(vp)->v_holdcnt && !(vp)->v_usecount)
|
|
|
|
/* Requires interlock. */
|
|
#define VSHOULDFREE(vp) \
|
|
(!((vp)->v_iflag & (VI_FREE|VI_DOOMED|VI_DOINGINACT)) && \
|
|
!(vp)->v_holdcnt && !(vp)->v_usecount && \
|
|
(!(vp)->v_object || \
|
|
!((vp)->v_object->ref_count || (vp)->v_object->resident_page_count)))
|
|
|
|
/* Requires interlock. */
|
|
#define VMIGHTFREE(vp) \
|
|
(!((vp)->v_iflag & (VI_FREE|VI_DOOMED|VI_XLOCK|VI_DOINGINACT)) && \
|
|
LIST_EMPTY(&(vp)->v_cache_src) && !(vp)->v_usecount)
|
|
|
|
/* Requires interlock. */
|
|
#define VSHOULDBUSY(vp) \
|
|
(((vp)->v_iflag & VI_FREE) && \
|
|
((vp)->v_holdcnt || (vp)->v_usecount))
|
|
|
|
#define VI_LOCK(vp) mtx_lock(&(vp)->v_interlock)
|
|
#define VI_TRYLOCK(vp) mtx_trylock(&(vp)->v_interlock)
|
|
#define VI_UNLOCK(vp) mtx_unlock(&(vp)->v_interlock)
|
|
#define VI_MTX(vp) (&(vp)->v_interlock)
|
|
|
|
#endif /* _KERNEL */
|
|
|
|
/*
|
|
* Mods for extensibility.
|
|
*/
|
|
|
|
/*
|
|
* Flags for vdesc_flags:
|
|
*/
|
|
#define VDESC_MAX_VPS 16
|
|
/* Low order 16 flag bits are reserved for willrele flags for vp arguments. */
|
|
#define VDESC_VP0_WILLRELE 0x0001
|
|
#define VDESC_VP1_WILLRELE 0x0002
|
|
#define VDESC_VP2_WILLRELE 0x0004
|
|
#define VDESC_VP3_WILLRELE 0x0008
|
|
#define VDESC_NOMAP_VPP 0x0100
|
|
#define VDESC_VPP_WILLRELE 0x0200
|
|
|
|
/*
|
|
* A generic structure.
|
|
* This can be used by bypass routines to identify generic arguments.
|
|
*/
|
|
struct vop_generic_args {
|
|
struct vnodeop_desc *a_desc;
|
|
/* other random data follows, presumably */
|
|
};
|
|
|
|
typedef int vop_bypass_t(struct vop_generic_args *);
|
|
|
|
/*
|
|
* VDESC_NO_OFFSET is used to identify the end of the offset list
|
|
* and in places where no such field exists.
|
|
*/
|
|
#define VDESC_NO_OFFSET -1
|
|
|
|
/*
|
|
* This structure describes the vnode operation taking place.
|
|
*/
|
|
struct vnodeop_desc {
|
|
char *vdesc_name; /* a readable name for debugging */
|
|
int vdesc_flags; /* VDESC_* flags */
|
|
vop_bypass_t *vdesc_call; /* Function to call */
|
|
|
|
/*
|
|
* These ops are used by bypass routines to map and locate arguments.
|
|
* Creds and procs are not needed in bypass routines, but sometimes
|
|
* they are useful to (for example) transport layers.
|
|
* Nameidata is useful because it has a cred in it.
|
|
*/
|
|
int *vdesc_vp_offsets; /* list ended by VDESC_NO_OFFSET */
|
|
int vdesc_vpp_offset; /* return vpp location */
|
|
int vdesc_cred_offset; /* cred location, if any */
|
|
int vdesc_thread_offset; /* thread location, if any */
|
|
int vdesc_componentname_offset; /* if any */
|
|
/*
|
|
* Finally, we've got a list of private data (about each operation)
|
|
* for each transport layer. (Support to manage this list is not
|
|
* yet part of BSD.)
|
|
*/
|
|
caddr_t *vdesc_transports;
|
|
};
|
|
|
|
#ifdef _KERNEL
|
|
/*
|
|
* A list of all the operation descs.
|
|
*/
|
|
extern struct vnodeop_desc *vnodeop_descs[];
|
|
|
|
#define VOPARG_OFFSETOF(s_type, field) __offsetof(s_type, field)
|
|
#define VOPARG_OFFSETTO(s_type, s_offset, struct_p) \
|
|
((s_type)(((char*)(struct_p)) + (s_offset)))
|
|
|
|
|
|
#ifdef DEBUG_VFS_LOCKS
|
|
/*
|
|
* Support code to aid in debugging VFS locking problems. Not totally
|
|
* reliable since if the thread sleeps between changing the lock
|
|
* state and checking it with the assert, some other thread could
|
|
* change the state. They are good enough for debugging a single
|
|
* filesystem using a single-threaded test.
|
|
*/
|
|
void assert_vi_locked(struct vnode *vp, const char *str);
|
|
void assert_vi_unlocked(struct vnode *vp, const char *str);
|
|
#if 0
|
|
void assert_vop_elocked(struct vnode *vp, const char *str);
|
|
void assert_vop_elocked_other(struct vnode *vp, const char *str);
|
|
#endif
|
|
void assert_vop_locked(struct vnode *vp, const char *str);
|
|
#if 0
|
|
voi0 assert_vop_slocked(struct vnode *vp, const char *str);
|
|
#endif
|
|
void assert_vop_unlocked(struct vnode *vp, const char *str);
|
|
|
|
/* These are called from within the actual VOPS. */
|
|
void vop_lock_pre(void *a);
|
|
void vop_lock_post(void *a, int rc);
|
|
void vop_lookup_post(void *a, int rc);
|
|
void vop_lookup_pre(void *a);
|
|
void vop_rename_pre(void *a);
|
|
void vop_strategy_pre(void *a);
|
|
void vop_unlock_post(void *a, int rc);
|
|
void vop_unlock_pre(void *a);
|
|
|
|
#define ASSERT_VI_LOCKED(vp, str) assert_vi_locked((vp), (str))
|
|
#define ASSERT_VI_UNLOCKED(vp, str) assert_vi_unlocked((vp), (str))
|
|
#if 0
|
|
#define ASSERT_VOP_ELOCKED(vp, str) assert_vop_elocked((vp), (str))
|
|
#define ASSERT_VOP_ELOCKED_OTHER(vp, str) assert_vop_locked_other((vp), (str))
|
|
#endif
|
|
#define ASSERT_VOP_LOCKED(vp, str) assert_vop_locked((vp), (str))
|
|
#if 0
|
|
#define ASSERT_VOP_SLOCKED(vp, str) assert_vop_slocked((vp), (str))
|
|
#endif
|
|
#define ASSERT_VOP_UNLOCKED(vp, str) assert_vop_unlocked((vp), (str))
|
|
|
|
#else /* !DEBUG_VFS_LOCKS */
|
|
|
|
#define ASSERT_VI_LOCKED(vp, str)
|
|
#define ASSERT_VI_UNLOCKED(vp, str)
|
|
#if 0
|
|
#define ASSERT_VOP_ELOCKED(vp, str)
|
|
#define ASSERT_VOP_ELOCKED_OTHER(vp, str)
|
|
#endif
|
|
#define ASSERT_VOP_LOCKED(vp, str)
|
|
#if 0
|
|
#define ASSERT_VOP_SLOCKED(vp, str)
|
|
#endif
|
|
#define ASSERT_VOP_UNLOCKED(vp, str)
|
|
#endif /* DEBUG_VFS_LOCKS */
|
|
|
|
|
|
/*
|
|
* This call works for vnodes in the kernel.
|
|
*/
|
|
#define VCALL(c) ((c)->a_desc->vdesc_call(c))
|
|
|
|
/*
|
|
* VMIO support inline
|
|
*/
|
|
|
|
extern int vmiodirenable;
|
|
|
|
static __inline int
|
|
vn_canvmio(struct vnode *vp)
|
|
{
|
|
if (vp && (vp->v_type == VREG || (vmiodirenable && vp->v_type == VDIR)))
|
|
return(TRUE);
|
|
return(FALSE);
|
|
}
|
|
|
|
/*
|
|
* Finally, include the default set of vnode operations.
|
|
*/
|
|
#include "vnode_if.h"
|
|
|
|
/*
|
|
* Public vnode manipulation functions.
|
|
*/
|
|
struct componentname;
|
|
struct file;
|
|
struct mount;
|
|
struct nameidata;
|
|
struct ostat;
|
|
struct thread;
|
|
struct proc;
|
|
struct stat;
|
|
struct nstat;
|
|
struct ucred;
|
|
struct uio;
|
|
struct vattr;
|
|
struct vnode;
|
|
|
|
extern int (*lease_check_hook)(struct vop_lease_args *);
|
|
extern int (*softdep_process_worklist_hook)(struct mount *);
|
|
|
|
/* cache_* may belong in namei.h. */
|
|
void cache_enter(struct vnode *dvp, struct vnode *vp,
|
|
struct componentname *cnp);
|
|
int cache_lookup(struct vnode *dvp, struct vnode **vpp,
|
|
struct componentname *cnp);
|
|
void cache_purge(struct vnode *vp);
|
|
void cache_purgevfs(struct mount *mp);
|
|
int cache_leaf_test(struct vnode *vp);
|
|
int change_dir(struct vnode *vp, struct thread *td);
|
|
int change_root(struct vnode *vp, struct thread *td);
|
|
void cvtstat(struct stat *st, struct ostat *ost);
|
|
void cvtnstat(struct stat *sb, struct nstat *nsb);
|
|
int getnewvnode(const char *tag, struct mount *mp, struct vop_vector *vops,
|
|
struct vnode **vpp);
|
|
u_quad_t init_va_filerev(void);
|
|
int lease_check(struct vop_lease_args *ap);
|
|
int speedup_syncer(void);
|
|
#define textvp_fullpath(p, rb, rfb) \
|
|
vn_fullpath(FIRST_THREAD_IN_PROC(p), (p)->p_textvp, rb, rfb)
|
|
int vn_fullpath(struct thread *td, struct vnode *vn,
|
|
char **retbuf, char **freebuf);
|
|
int vaccess(enum vtype type, mode_t file_mode, uid_t uid, gid_t gid,
|
|
mode_t acc_mode, struct ucred *cred, int *privused);
|
|
int vaccess_acl_posix1e(enum vtype type, uid_t file_uid,
|
|
gid_t file_gid, struct acl *acl, mode_t acc_mode,
|
|
struct ucred *cred, int *privused);
|
|
void vattr_null(struct vattr *vap);
|
|
int vcount(struct vnode *vp);
|
|
void vdrop(struct vnode *);
|
|
int vfinddev(struct cdev *dev, struct vnode **vpp);
|
|
void vfs_add_vnodeops(const void *);
|
|
void vfs_rm_vnodeops(const void *);
|
|
int vflush(struct mount *mp, int rootrefs, int flags, struct thread *td);
|
|
int vget(struct vnode *vp, int lockflag, struct thread *td);
|
|
void vgone(struct vnode *vp);
|
|
void vgonel(struct vnode *vp, struct thread *td);
|
|
void vhold(struct vnode *);
|
|
int vinvalbuf(struct vnode *vp, int save,
|
|
struct thread *td, int slpflag, int slptimeo);
|
|
int vtruncbuf(struct vnode *vp, struct ucred *cred, struct thread *td,
|
|
off_t length, int blksize);
|
|
void vn_printf(struct vnode *vp, const char *fmt, ...) __printflike(2,3);
|
|
#define vprint(label, vp) vn_printf((vp), "%s\n", (label))
|
|
int vrecycle(struct vnode *vp, struct thread *td);
|
|
int vn_close(struct vnode *vp,
|
|
int flags, struct ucred *file_cred, struct thread *td);
|
|
void vn_finished_write(struct mount *mp);
|
|
int vn_isdisk(struct vnode *vp, int *errp);
|
|
int vn_lock(struct vnode *vp, int flags, struct thread *td);
|
|
#ifdef DEBUG_LOCKS
|
|
int debug_vn_lock(struct vnode *vp, int flags, struct thread *p,
|
|
const char *filename, int line);
|
|
#define vn_lock(vp,flags,p) debug_vn_lock(vp,flags,p,__FILE__,__LINE__)
|
|
#endif
|
|
int vn_open(struct nameidata *ndp, int *flagp, int cmode, int fdidx);
|
|
int vn_open_cred(struct nameidata *ndp, int *flagp, int cmode,
|
|
struct ucred *cred, int fdidx);
|
|
int vn_pollrecord(struct vnode *vp, struct thread *p, int events);
|
|
int vn_rdwr(enum uio_rw rw, struct vnode *vp, caddr_t base,
|
|
int len, off_t offset, enum uio_seg segflg, int ioflg,
|
|
struct ucred *active_cred, struct ucred *file_cred, int *aresid,
|
|
struct thread *td);
|
|
int vn_rdwr_inchunks(enum uio_rw rw, struct vnode *vp, caddr_t base,
|
|
size_t len, off_t offset, enum uio_seg segflg, int ioflg,
|
|
struct ucred *active_cred, struct ucred *file_cred, size_t *aresid,
|
|
struct thread *td);
|
|
int vn_stat(struct vnode *vp, struct stat *sb, struct ucred *active_cred,
|
|
struct ucred *file_cred, struct thread *td);
|
|
int vn_start_write(struct vnode *vp, struct mount **mpp, int flags);
|
|
int vn_write_suspend_wait(struct vnode *vp, struct mount *mp,
|
|
int flags);
|
|
int vn_writechk(struct vnode *vp);
|
|
int vn_extattr_get(struct vnode *vp, int ioflg, int attrnamespace,
|
|
const char *attrname, int *buflen, char *buf, struct thread *td);
|
|
int vn_extattr_set(struct vnode *vp, int ioflg, int attrnamespace,
|
|
const char *attrname, int buflen, char *buf, struct thread *td);
|
|
int vn_extattr_rm(struct vnode *vp, int ioflg, int attrnamespace,
|
|
const char *attrname, struct thread *td);
|
|
int vfs_cache_lookup(struct vop_lookup_args *ap);
|
|
void vfs_timestamp(struct timespec *);
|
|
void vfs_write_resume(struct mount *mp);
|
|
int vfs_write_suspend(struct mount *mp);
|
|
int vop_stdbmap(struct vop_bmap_args *);
|
|
int vop_stdfsync(struct vop_fsync_args *);
|
|
int vop_stdgetwritemount(struct vop_getwritemount_args *);
|
|
int vop_stdgetpages(struct vop_getpages_args *);
|
|
int vop_stdinactive(struct vop_inactive_args *);
|
|
int vop_stdislocked(struct vop_islocked_args *);
|
|
int vop_stdlock(struct vop_lock_args *);
|
|
int vop_stdputpages(struct vop_putpages_args *);
|
|
int vop_stdunlock(struct vop_unlock_args *);
|
|
int vop_nopoll(struct vop_poll_args *);
|
|
int vop_stdpathconf(struct vop_pathconf_args *);
|
|
int vop_stdpoll(struct vop_poll_args *);
|
|
int vop_eopnotsupp(struct vop_generic_args *ap);
|
|
int vop_ebadf(struct vop_generic_args *ap);
|
|
int vop_einval(struct vop_generic_args *ap);
|
|
int vop_enotty(struct vop_generic_args *ap);
|
|
int vop_null(struct vop_generic_args *ap);
|
|
int vop_panic(struct vop_generic_args *ap);
|
|
|
|
void vfree(struct vnode *);
|
|
void vput(struct vnode *vp);
|
|
void vrele(struct vnode *vp);
|
|
void vref(struct vnode *vp);
|
|
int vrefcnt(struct vnode *vp);
|
|
void v_addpollinfo(struct vnode *vp);
|
|
|
|
int vnode_create_vobject(struct vnode *vp, size_t size, struct thread *td);
|
|
void vnode_destroy_vobject(struct vnode *vp);
|
|
|
|
extern struct vop_vector fifo_specops;
|
|
extern struct vop_vector dead_vnodeops;
|
|
extern struct vop_vector default_vnodeops;
|
|
|
|
#define VOP_PANIC ((void*)(uintptr_t)vop_panic)
|
|
#define VOP_NULL ((void*)(uintptr_t)vop_null)
|
|
#define VOP_EBADF ((void*)(uintptr_t)vop_ebadf)
|
|
#define VOP_ENOTTY ((void*)(uintptr_t)vop_enotty)
|
|
#define VOP_EINVAL ((void*)(uintptr_t)vop_einval)
|
|
#define VOP_EOPNOTSUPP ((void*)(uintptr_t)vop_eopnotsupp)
|
|
|
|
|
|
#endif /* _KERNEL */
|
|
|
|
#endif /* !_SYS_VNODE_H_ */
|