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gems-kernel/source/THIRDPARTY/xnu/bsd/sys/vnode_internal.h
Sam Sneed f5727805f2 add darwin/xnu functionality
2024-06-03 11:29:39 -05:00

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/*
* Copyright (c) 2000-2012 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* compliance with the License. The rights granted to you under the License
* may not be used to create, or enable the creation or redistribution of,
* unlawful or unlicensed copies of an Apple operating system, or to
* circumvent, violate, or enable the circumvention or violation of, any
* terms of an Apple operating system software license agreement.
*
* Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this file.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
* limitations under the License.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
/*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 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 8.17 (Berkeley) 5/20/95
*/
/*
* NOTICE: This file was modified by SPARTA, Inc. in 2005 to introduce
* support for mandatory and extensible security protections. This notice
* is included in support of clause 2.2 (b) of the Apple Public License,
* Version 2.0.
*/
#ifndef _SYS_VNODE_INTERNAL_H_
#define _SYS_VNODE_INTERNAL_H_
#include <sys/appleapiopts.h>
#include <sys/cdefs.h>
#include <sys/queue.h>
#include <sys/lock.h>
#include <sys/time.h>
#include <sys/uio.h>
#include <sys/vm.h>
#include <sys/systm.h>
#include <kern/locks.h>
#include <vm/vm_kern.h>
#include <sys/vnode.h>
#include <sys/namei.h>
#include <kern/smr.h>
#include <sys/vfs_context.h>
#include <sys/sysctl.h>
struct lockf;
struct label;
LIST_HEAD(buflists, buf);
#if CONFIG_TRIGGERS
/*
* VFS Internal (private) trigger vnode resolver info.
*/
struct vnode_resolve {
lck_mtx_t vr_lock; /* protects vnode_resolve_t fields */
trigger_vnode_resolve_callback_t vr_resolve_func;
trigger_vnode_unresolve_callback_t vr_unresolve_func;
trigger_vnode_rearm_callback_t vr_rearm_func;
trigger_vnode_reclaim_callback_t vr_reclaim_func;
void * vr_data; /* private data for resolver */
uint32_t vr_flags;
uint32_t vr_lastseq;
};
typedef struct vnode_resolve *vnode_resolve_t;
/* private vr_flags */
#define VNT_RESOLVED (1UL << 31)
#define VNT_VFS_UNMOUNTED (1UL << 30)
#define VNT_EXTERNAL (1UL << 29)
#endif /* CONFIG_TRIGGERS */
#if CONFIG_IOCOUNT_TRACE
#define IOCOUNT_TRACE_VGET 0
#define IOCOUNT_TRACE_VPUT 1
#define IOCOUNT_TRACE_MAX_TYPES 2
#define IOCOUNT_TRACE_MAX_IDX 16
#define IOCOUNT_TRACE_MAX_FRAMES 10
struct vnode_iocount_trace {
int idx;
int counts[IOCOUNT_TRACE_MAX_IDX];
void *stacks[IOCOUNT_TRACE_MAX_IDX][IOCOUNT_TRACE_MAX_FRAMES];
};
typedef struct vnode_iocount_trace *vnode_iocount_trace_t;
#endif /* CONFIG_IOCOUNT_TRACE */
#if CONFIG_FILE_LEASES
#define FL_FLAG_RELEASE_PENDING 0x00000001
#define FL_FLAG_DOWNGRADE_PENDING 0x00000002
struct file_lease {
LIST_ENTRY(file_lease) fl_link;
struct fileglob *fl_fg; /* The file that the lease is placed on */
pid_t fl_pid; /* The process's pid that owns the lease */
int fl_type; /* The file lease type: F_RDLCK, F_WRLCK */
uint32_t fl_flags; /* The file lease flags */
uint64_t fl_release_start; /* The lease release start time */
uint64_t fl_downgrade_start; /* The lease downgrade start time */
};
typedef struct file_lease *file_lease_t;
#endif /* CONFIG_FILE_LEASES */
/*
* Reading or writing any of these items requires holding the appropriate lock.
* v_freelist is locked by the global vnode_list_lock
* v_mntvnodes is locked by the mount_lock
* v_nclinks and v_ncchildren are protected by the global name_cache_lock
* v_cleanblkhd and v_dirtyblkhd and v_iterblkflags are locked via the global buf_mtx
* the rest of the structure is protected by the vnode_lock
*/
struct vnode {
lck_mtx_t v_lock; /* vnode mutex */
TAILQ_ENTRY(vnode) v_freelist; /* vnode freelist */
TAILQ_ENTRY(vnode) v_mntvnodes; /* vnodes for mount point */
TAILQ_HEAD(, namecache) v_ncchildren; /* name cache entries that regard us as their parent */
LIST_HEAD(, namecache) v_nclinks; /* name cache entries that name this vnode */
vnode_t v_defer_reclaimlist; /* in case we have to defer the reclaim to avoid recursion */
uint32_t v_listflag; /* flags protected by the vnode_list_lock (see below) */
uint32_t v_flag; /* vnode flags (see below) */
uint16_t v_lflag; /* vnode local and named ref flags */
uint8_t v_iterblkflags; /* buf iterator flags */
uint8_t v_references; /* number of times io_count has been granted */
int32_t v_kusecount; /* count of in-kernel refs */
int32_t v_usecount; /* reference count of users */
int32_t v_iocount; /* iocounters */
void * XNU_PTRAUTH_SIGNED_PTR("vnode.v_owner") v_owner; /* act that owns the vnode */
uint16_t v_type; /* vnode type */
uint16_t v_tag; /* type of underlying data */
uint32_t v_id; /* identity of vnode contents */
union {
struct mount * XNU_PTRAUTH_SIGNED_PTR("vnode.v_data") vu_mountedhere; /* ptr to mounted vfs (VDIR) */
struct socket * XNU_PTRAUTH_SIGNED_PTR("vnode.vu_socket") vu_socket; /* unix ipc (VSOCK) */
struct specinfo * XNU_PTRAUTH_SIGNED_PTR("vnode.vu_specinfo") vu_specinfo; /* device (VCHR, VBLK) */
struct fifoinfo * XNU_PTRAUTH_SIGNED_PTR("vnode.vu_fifoinfo") vu_fifoinfo; /* fifo (VFIFO) */
struct ubc_info * XNU_PTRAUTH_SIGNED_PTR("vnode.vu_ubcinfo") vu_ubcinfo; /* valid for (VREG) */
} v_un;
struct buflists v_cleanblkhd; /* clean blocklist head */
struct buflists v_dirtyblkhd; /* dirty blocklist head */
struct klist v_knotes; /* knotes attached to this vnode */
/*
* the following 4 fields are protected
* by the name_cache_lock held in
* excluive mode
*/
kauth_cred_t XNU_PTRAUTH_SIGNED_PTR("vnode.v_cred") v_cred; /* last authorized credential */
kauth_action_t v_authorized_actions; /* current authorized actions for v_cred */
int v_cred_timestamp; /* determine if entry is stale for MNTK_AUTH_OPAQUE */
int v_nc_generation; /* changes when nodes are removed from the name cache */
/*
* back to the vnode lock for protection
*/
int32_t v_numoutput; /* num of writes in progress */
int32_t v_writecount; /* reference count of writers */
uint32_t v_holdcount; /* reference to keep vnode from being freed after reclaim */
const char *v_name; /* name component of the vnode */
vnode_t XNU_PTRAUTH_SIGNED_PTR("vnode.v_parent") v_parent; /* pointer to parent vnode */
struct lockf *v_lockf; /* advisory lock list head */
int(**v_op)(void *); /* vnode operations vector */
mount_t XNU_PTRAUTH_SIGNED_PTR("vnode.v_mount") v_mount; /* ptr to vfs we are in */
void * v_data; /* private data for fs */
#if CONFIG_MACF
struct label *v_label; /* MAC security label */
#endif
#if CONFIG_TRIGGERS
vnode_resolve_t v_resolve; /* trigger vnode resolve info (VDIR only) */
#endif /* CONFIG_TRIGGERS */
#if CONFIG_FIRMLINKS
vnode_t v_fmlink; /* firmlink if set (VDIR only), Points to source
* if VFLINKTARGET is set, if VFLINKTARGET is not
* set, points to target */
#endif /* CONFIG_FIRMLINKS */
#if CONFIG_IO_COMPRESSION_STATS
io_compression_stats_t io_compression_stats; /* IO compression statistics */
#endif /* CONFIG_IO_COMPRESSION_STATS */
#if CONFIG_IOCOUNT_TRACE
vnode_iocount_trace_t v_iocount_trace;
#endif /* CONFIG_IOCOUNT_TRACE */
#if CONFIG_FILE_LEASES
LIST_HEAD(fl_head, file_lease) v_leases; /* list of leases in place */
#endif /* CONFIG_FILE_LEASES */
};
#define v_mountedhere v_un.vu_mountedhere
#define v_socket v_un.vu_socket
#define v_specinfo v_un.vu_specinfo
#define v_fifoinfo v_un.vu_fifoinfo
#define v_ubcinfo v_un.vu_ubcinfo
/*
* v_iterblkflags
*/
#define VBI_ITER 0x1
#define VBI_ITERWANT 0x2
#define VBI_CLEAN 0x4
#define VBI_DIRTY 0x8
#define VBI_NEWBUF 0x10
/*
* v_listflag
*/
#define VLIST_RAGE 0x01 /* vnode is currently in the rapid age list */
#define VLIST_DEAD 0x02 /* vnode is currently in the dead list */
#define VLIST_ASYNC_WORK 0x04 /* vnode is currently on the deferred async work queue */
#define VLIST_NO_REUSE 0x08 /* vnode should not be reused, will be deallocated */
/*
* v_lflags
*/
#define VL_SUSPENDED 0x0001 /* vnode is suspended */
#define VL_DRAIN 0x0002 /* vnode is being drained */
#define VL_TERMINATE 0x0004 /* vnode is in the process of being recycled */
#define VL_TERMWANT 0x0008 /* there's a waiter for recycle finish (vnode_getiocount)*/
#define VL_DEAD 0x0010 /* vnode is dead, cleaned of filesystem-specific info */
#define VL_MARKTERM 0x0020 /* vnode should be recycled when no longer referenced */
#define VL_OPSCHANGE 0x0040 /* device vnode is changing vnodeops */
#define VL_NEEDINACTIVE 0x0080 /* delay VNOP_INACTIVE until iocount goes to 0 */
#define VL_LABEL 0x0100 /* vnode is marked for labeling */
#define VL_LABELWAIT 0x0200 /* vnode is marked for labeling */
#define VL_LABELED 0x0400 /* vnode is labeled */
#define VL_LWARNED 0x0800
#define VL_HASSTREAMS 0x1000 /* vnode has had at least one associated named stream vnode (may not have one any longer) */
#define VNAMED_UBC 0x2000 /* ubc named reference */
#define VNAMED_MOUNT 0x4000 /* mount point named reference */
#define VNAMED_FSHASH 0x8000 /* FS hash named reference */
/*
* v_flags
*/
#define VROOT 0x000001 /* root of its file system */
#define VTEXT 0x000002 /* vnode is a pure text prototype */
#define VSYSTEM 0x000004 /* vnode being used by kernel */
#define VISTTY 0x000008 /* vnode represents a tty */
#define VRAGE 0x000010 /* vnode is in rapid age state */
#define VBDEVVP 0x000020 /* vnode created by bdevvp */
#define VDEVFLUSH 0x000040 /* device vnode after vflush */
#define VMOUNT 0x000080 /* mount operation in progress */
#define VBWAIT 0x000100 /* waiting for output to complete */
#define VSHARED_DYLD 0x000200 /* vnode is a dyld shared cache file */
#define VNOCACHE_DATA 0x000400 /* don't keep data cached once it's been consumed */
#define VSTANDARD 0x000800 /* vnode obtained from common pool */
#define VAGE 0x001000 /* Insert vnode at head of free list */
#define VRAOFF 0x002000 /* read ahead disabled */
#define VNCACHEABLE 0x004000 /* vnode is allowed to be put back in name cache */
#if NAMEDSTREAMS
#define VISSHADOW 0x008000 /* vnode is a shadow file */
#endif
#define VSWAP 0x010000 /* vnode is being used as swapfile */
#define VTHROTTLED 0x020000 /* writes or pageouts have been throttled */
/* wakeup tasks waiting when count falls below threshold */
#define VNOFLUSH 0x040000 /* don't vflush() if SKIPSYSTEM */
#define VLOCKLOCAL 0x080000 /* this vnode does adv locking in vfs */
#define VISHARDLINK 0x100000 /* hard link needs special processing on lookup and in volfs */
#define VISUNION 0x200000 /* union special processing */
#define VISNAMEDSTREAM 0x400000 /* vnode is a named stream (eg HFS resource fork) */
#define VOPENEVT 0x800000 /* if process is P_CHECKOPENEVT, then or in the O_EVTONLY flag on open */
#define VCANDEALLOC 0x1000000
#define VNOCS 0x2000000 /* is there no code signature available */
#define VISDIRTY 0x4000000 /* vnode will need IO if reclaimed */
#define VFASTDEVCANDIDATE 0x8000000 /* vnode is a candidate to store on a fast device */
#define VAUTOCANDIDATE 0x10000000 /* vnode was automatically marked as a fast-dev candidate */
#define VFMLINKTARGET 0x20000000 /* vnode is firmlink target */
#define VMOUNTEDHERE 0x40000000 /* vnode is a mountpoint */
/*
* 0x80000000 not used.
*/
/*
* This structure describes vnode data which is specific to a file descriptor.
* It is currently used only for file descriptors which are for opened for
* directories.
*/
struct fd_vn_data {
lck_mtx_t fv_lock; /* Used to serialize directory enumeration on fd */
off_t fv_offset; /* Offset to be used */
void *fv_dircookie; /* If FS doesn't like offsets in directories */
caddr_t fv_buf; /* Temporary buffer to store directory entries */
size_t fv_bufsiz; /* Valid size of fv_buf */
size_t fv_bufdone; /* How much of fv_buf is processed */
size_t fv_bufallocsiz; /* Allocation size determined for Buffer*/
off_t fv_soff; /* Starting FS offset for this buffer */
off_t fv_eoff; /* Ending FS offset for this buffer */
int fv_eofflag;/* Does fv_eoff represent EOF ? */
};
/*
* FV_DIRBUF_START_SIZ is the initial size of the buffer passed to VNOP_READDIR.
* That may not be enough for some filesytems so the current algorithm works its
* way upto FV_DIRBUF_MAX_SIZ
*/
#define FV_DIRBUF_DIRENTRY_SIZ (sizeof(struct direntry))
#define FV_DIRBUF_START_SIZ FV_DIRBUF_DIRENTRY_SIZ
#define FV_DIRBUF_MAX_SIZ (4*(sizeof(struct direntry)))
#define FV_LOCK(fvd) lck_mtx_lock(&(((struct fd_vn_data *)fvd)->fv_lock))
#define FV_UNLOCK(fvd) lck_mtx_unlock(&(((struct fd_vn_data *)fvd)->fv_lock))
/*
* Global vnode data.
*/
extern struct vnode *rootvnode; /* root (i.e. "/") vnode */
#ifdef CONFIG_IMGSRC_ACCESS
#define MAX_IMAGEBOOT_NESTING 2
extern struct vnode *imgsrc_rootvnodes[];
#endif /* CONFIG_IMGSRC_ACCESS */
/*
* Mods for exensibility.
*/
/*
* 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 0x00001
#define VDESC_VP1_WILLRELE 0x00002
#define VDESC_VP2_WILLRELE 0x00004
#define VDESC_VP3_WILLRELE 0x00008
#define VDESC_NOMAP_VPP 0x00100
#define VDESC_VPP_WILLRELE 0x00200
#define VDESC_DISABLED 0x10000 /* descriptor defined but op is unused, has no op slot */
/*
* 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 {
int vdesc_offset; /* offset in vector--first for speed */
const char *vdesc_name; /* a readable name for debugging */
int vdesc_flags; /* VDESC_* flags */
/*
* 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_proc_offset; /* proc location, if any */
int vdesc_componentname_offset; /* if any */
int vdesc_context_offset; /* context location, 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;
};
/*
* A list of all the operation descs.
*/
extern struct vnodeop_desc *vnodeop_descs[];
/*
* This macro is very helpful in defining those offsets in the vdesc struct.
*
* This is stolen from X11R4. I ingored all the fancy stuff for
* Crays, so if you decide to port this to such a serious machine,
* you might want to consult Intrisics.h's XtOffset{,Of,To}.
*/
#define VOPARG_OFFSET(p_type, field) \
((int) (((char *) (&(((p_type)NULL)->field))) - ((char *) NULL)))
#define VOPARG_OFFSETOF(s_type, field) \
VOPARG_OFFSET(s_type*,field)
#define VOPARG_OFFSETTO(S_TYPE, S_OFFSET, STRUCT_P) \
((S_TYPE)(((char*)(STRUCT_P))+(S_OFFSET)))
/*
* VOCALL calls an op given an ops vector. We break it out because BSD's
* vclean changes the ops vector and then wants to call ops with the old
* vector.
*/
#define VOCALL(OPSV, OFF, AP) (( *((OPSV)[(OFF)])) (AP))
/*
* This call works for vnodes in the kernel.
*/
#define VCALL(VP, OFF, AP) VOCALL((VP)->v_op,(OFF),(AP))
#define VDESC(OP) (& __CONCAT(OP,_desc))
#define VOFFSET(OP) (VDESC(OP)->vdesc_offset)
struct ostat;
/* bdevvp moved to vnode.h as private KPI */
void cvtstat(struct stat *st, struct ostat *ost);
void vprint(const char *label, struct vnode *vp);
__private_extern__ int set_package_extensions_table(user_addr_t data, int nentries, int maxwidth);
int vn_rdwr_64(enum uio_rw rw, struct vnode *vp, uint64_t base,
int64_t len, off_t offset, enum uio_seg segflg,
int ioflg, kauth_cred_t cred, int64_t *aresid,
struct proc *p);
#if CONFIG_MACF
int vn_setlabel(struct vnode *vp, struct label *intlabel,
vfs_context_t context);
#endif
void fifo_printinfo(struct vnode *vp);
int vn_open(struct nameidata *ndp, int fmode, int cmode);
int vn_open_modflags(struct nameidata *ndp, int *fmode, int cmode);
int vn_open_auth(struct nameidata *ndp, int *fmode, struct vnode_attr *, vnode_t authvp);
int vn_close(vnode_t, int flags, vfs_context_t ctx);
errno_t vn_remove(vnode_t dvp, vnode_t *vpp, struct nameidata *ndp, int32_t flags, struct vnode_attr *vap, vfs_context_t ctx);
errno_t vn_rename(struct vnode *fdvp, struct vnode **fvpp, struct componentname *fcnp, struct vnode_attr *fvap,
struct vnode *tdvp, struct vnode **tvpp, struct componentname *tcnp, struct vnode_attr *tvap,
uint32_t flags, vfs_context_t ctx);
void lock_vnode_and_post(vnode_t, int);
#define post_event_if_success(_vp, _error, _event) \
do { \
if (0 == (_error)) { \
lock_vnode_and_post((_vp), (_event)); \
} \
} while (0)
/* Authorization subroutines */
int vn_authorize_open_existing(vnode_t vp, struct componentname *cnp, int fmode, vfs_context_t ctx, void *reserved);
int vn_authorize_create(vnode_t, struct componentname *, struct vnode_attr *, vfs_context_t, void*);
int vn_attribute_prepare(vnode_t dvp, struct vnode_attr *vap, uint32_t *defaulted_fieldsp, vfs_context_t ctx);
void vn_attribute_cleanup(struct vnode_attr *vap, uint32_t defaulted_fields);
int vn_authorize_rename(struct vnode *fdvp, struct vnode *fvp, struct componentname *fcnp,
struct vnode *tdvp, struct vnode *tvp, struct componentname *tcnp,
vfs_context_t ctx, void *reserved);
int vn_authorize_renamex(struct vnode *fdvp, struct vnode *fvp, struct componentname *fcnp,
struct vnode *tdvp, struct vnode *tvp, struct componentname *tcnp,
vfs_context_t ctx, vfs_rename_flags_t flags, void *reserved);
int vn_authorize_renamex_with_paths(struct vnode *fdvp, struct vnode *fvp, struct componentname *fcnp, const char *from_path,
struct vnode *tdvp, struct vnode *tvp, struct componentname *tcnp, const char *to_path,
vfs_context_t ctx, vfs_rename_flags_t flags, void *reserved);
typedef int (*vn_create_authorizer_t)(vnode_t, struct componentname *, struct vnode_attr *, vfs_context_t, void*);
int vn_authorize_mkdir(vnode_t, struct componentname *, struct vnode_attr *, vfs_context_t, void*);
int vn_authorize_null(vnode_t, struct componentname *, struct vnode_attr *, vfs_context_t, void*);
int vnode_attr_authorize_dir_clone(struct vnode_attr *vap, kauth_action_t action,
struct vnode_attr *dvap, vnode_t sdvp, mount_t mp, dir_clone_authorizer_op_t vattr_op,
uint32_t flags, vfs_context_t ctx, void *reserved);
/* End of authorization subroutines */
void vnode_attr_handle_uid_and_gid(struct vnode_attr *vap, mount_t mp, vfs_context_t ctx);
#define VN_CREATE_NOAUTH (1<<0)
#define VN_CREATE_NOINHERIT (1<<1)
#define VN_CREATE_UNION (1<<2)
#define VN_CREATE_NOLABEL (1<<3)
#define VN_CREATE_DOOPEN (1<<4) /* Open file if a batched operation is available */
errno_t vn_create(vnode_t, vnode_t *, struct nameidata *, struct vnode_attr *, uint32_t, int, uint32_t*, vfs_context_t);
int vn_mkdir(vnode_t dvp, vnode_t *vpp, struct nameidata *ndp, struct vnode_attr *vap, vfs_context_t ctx);
int vn_rmdir(vnode_t dvp, vnode_t *vpp, struct nameidata *ndp, struct vnode_attr *vap, vfs_context_t ctx);
int vn_getxattr(vnode_t, const char *, uio_t, size_t *, int, vfs_context_t);
int vn_setxattr(vnode_t, const char *, uio_t, int, vfs_context_t);
int vn_removexattr(vnode_t, const char *, int, vfs_context_t);
int vn_listxattr(vnode_t, uio_t, size_t *, int, vfs_context_t);
#if NAMEDSTREAMS
errno_t vnode_getnamedstream(vnode_t, vnode_t *, const char *, enum nsoperation, int, vfs_context_t);
errno_t vnode_makenamedstream(vnode_t, vnode_t *, const char *, int, vfs_context_t);
errno_t vnode_removenamedstream(vnode_t, vnode_t, const char *, int, vfs_context_t);
errno_t vnode_flushnamedstream(vnode_t vp, vnode_t svp, vfs_context_t context);
errno_t vnode_relenamedstream(vnode_t vp, vnode_t svp);
errno_t vnode_verifynamedstream(vnode_t vp);
#endif
void nchinit(void);
int resize_namecache(int newsize);
void name_cache_lock_shared(void);
boolean_t name_cache_lock_shared_to_exclusive(void);
void name_cache_lock(void);
void name_cache_unlock(void);
void cache_enter_with_gen(vnode_t dvp, vnode_t vp, struct componentname *cnp, int gen);
const char *cache_enter_create(vnode_t dvp, vnode_t vp, struct componentname *cnp);
extern int nc_disabled;
#define vnode_lock_convert(v) lck_mtx_convert_spin(&(v)->v_lock)
void vnode_lock_spin(vnode_t);
void vnode_list_lock(void);
void vnode_list_unlock(void);
#define VNODE_REF_FORCE 0x1
int vnode_ref_ext(vnode_t, int, int);
void vnode_rele_internal(vnode_t, int, int, int);
#ifdef BSD_KERNEL_PRIVATE
int vnode_getalways(vnode_t);
int vnode_getalways_from_pager(vnode_t);
int vget_internal(vnode_t, int, int);
errno_t vnode_getiocount(vnode_t, unsigned int, int);
vnode_t vnode_getparent_if_different(vnode_t, vnode_t);
#endif /* BSD_KERNEL_PRIVATE */
int vnode_get_locked(vnode_t);
int vnode_put_locked(vnode_t);
#ifdef BSD_KERNEL_PRIVATE
int vnode_put_from_pager(vnode_t);
vnode_t vnode_drop_and_unlock(vnode_t);
#endif /* BSD_KERNEL_PRIVATE */
int vnode_issock(vnode_t);
int vnode_isaliased(vnode_t);
void unlock_fsnode(vnode_t, int *);
int lock_fsnode(vnode_t, int *);
errno_t vnode_resume(vnode_t);
errno_t vnode_suspend(vnode_t);
errno_t vnode_mtime(vnode_t, struct timespec *, vfs_context_t);
errno_t vnode_flags(vnode_t, uint32_t *, vfs_context_t);
errno_t vnode_size(vnode_t, off_t *, vfs_context_t);
errno_t vnode_setsize(vnode_t, off_t, int ioflag, vfs_context_t);
int vnode_setattr_fallback(vnode_t vp, struct vnode_attr *vap, vfs_context_t ctx);
int vnode_isspec(vnode_t vp);
#ifdef BSD_KERNEL_PRIVATE
typedef uint32_t compound_vnop_id_t;
#define COMPOUND_VNOP_OPEN 0x01
#define COMPOUND_VNOP_MKDIR 0x02
#define COMPOUND_VNOP_RENAME 0x04
#define COMPOUND_VNOP_REMOVE 0x08
#define COMPOUND_VNOP_RMDIR 0x10
int vnode_compound_rename_available(vnode_t vp);
int vnode_compound_rmdir_available(vnode_t vp);
int vnode_compound_mkdir_available(vnode_t vp);
int vnode_compound_remove_available(vnode_t vp);
int vnode_compound_open_available(vnode_t vp);
int vnode_compound_op_available(vnode_t, compound_vnop_id_t);
#endif /* BSD_KERNEL_PRIVATE */
void vn_setunionwait(vnode_t);
void vn_checkunionwait(vnode_t);
void vn_clearunionwait(vnode_t, int);
void SPECHASH_LOCK(void);
void SPECHASH_UNLOCK(void);
lck_mtx_t * SPECHASH_LOCK_ADDR(void);
void vnode_authorize_init(void);
void vfsinit(void);
void vnode_lock(vnode_t);
void vnode_unlock(vnode_t);
void vn_print_state(vnode_t /* vp */, const char * /* fmt */, ...)
__printflike(2, 3);
#if DEVELOPMENT || DEBUG
#define VNASSERT(exp, vp, msg) \
do { \
if (__improbable(!(exp))) { \
vn_print_state(vp, "VNASSERT failed %s:%d\n", __FILE__, \
__LINE__); \
panic msg; \
} \
} while (0)
#else
#define VNASSERT(exp, vp, msg)
#endif /* DEVELOPMENT || DEBUG */
/*
* XXX exported symbols; should be static
*/
void vfs_op_init(void);
void vfs_opv_init(void);
#ifdef BSD_KERNEL_PRIVATE
int vfs_sysctl_node SYSCTL_HANDLER_ARGS;
void vnode_setneedinactive(vnode_t);
int vnode_hasnamedstreams(vnode_t); /* Does this vnode have associated named streams? */
errno_t
vnode_readdir64(struct vnode *vp, struct uio *uio, int flags, int *eofflag,
int *numdirent, vfs_context_t ctxp);
void vnode_setswapmount(vnode_t);
int64_t vnode_getswappin_avail(vnode_t);
int vnode_get_snapdir(vnode_t, vnode_t *, vfs_context_t);
#if CONFIG_TRIGGERS
/* VFS Internal Vnode Trigger Interfaces (Private) */
int vnode_trigger_resolve(vnode_t, struct nameidata *, vfs_context_t);
void vnode_trigger_rearm(vnode_t, vfs_context_t);
void vfs_nested_trigger_unmounts(mount_t, int, vfs_context_t);
#endif /* CONFIG_TRIGGERS */
int build_path_with_parent(vnode_t, vnode_t /* parent */, char *, int, int *, size_t *, int, vfs_context_t);
void nspace_resolver_init(void);
void nspace_resolver_exited(struct proc *);
int vnode_isinuse_locked(vnode_t, int, int );
kauth_cred_t vnode_cred(vnode_t);
int fsgetpath_internal(vfs_context_t, int, uint64_t, vm_size_t, caddr_t, uint32_t options, int *);
#endif /* BSD_KERNEL_PRIVATE */
#if CONFIG_IO_COMPRESSION_STATS
/*
* update the IO compression stats tracked at block granularity
*/
int vnode_updateiocompressionblockstats(vnode_t vp, uint32_t size_bucket);
/*
* update the IO compression stats tracked for the buffer
*/
int vnode_updateiocompressionbufferstats(vnode_t vp, uint64_t uncompressed_size, uint64_t compressed_size, uint32_t size_bucket, uint32_t compression_bucket);
#endif /* CONFIG_IO_COMPRESSION_STATS */
extern bool rootvp_is_ssd;
#if CONFIG_FILE_LEASES
int vnode_setlease(vnode_t vp, struct fileglob *fg, int fl_type, int expcounts,
vfs_context_t ctx);
int vnode_getlease(vnode_t vp);
int vnode_breaklease(vnode_t vp, uint32_t oflags, vfs_context_t ctx);
void vnode_breakdirlease(vnode_t vp, bool need_parent, uint32_t oflags);
void vnode_revokelease(vnode_t vp, bool locked);
#endif /* CONFIG_FILE_LEASES */
#define VFS_SMR_DECLARE \
extern smr_t vfs_smr
#define VFS_SMR() vfs_smr
#define vfs_smr_enter() smr_enter(VFS_SMR())
#define vfs_smr_leave() smr_leave(VFS_SMR())
#define vfs_smr_synchronize() smr_synchronize(VFS_SMR())
bool vnode_hold_smr(vnode_t);
#endif /* !_SYS_VNODE_INTERNAL_H_ */
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