/*
- * Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2016 Apple Inc. All rights reserved.
*
- * @APPLE_LICENSE_HEADER_START@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License"). You may not use this file except in compliance with the
- * License. Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
+ * 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.
*
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * 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 OR NON-INFRINGEMENT. Please see the
- * License for the specific language governing rights and limitations
- * under the License.
+ * 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_LICENSE_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
/*
*
* @(#)mount.h 8.21 (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_MOUNT_H_
#define _SYS_MOUNT_H_
#include <stdint.h>
#include <sys/ucred.h>
#include <sys/queue.h> /* XXX needed for user builds */
+#include <Availability.h>
#else
#include <sys/kernel_types.h>
+#include <uuid/uuid.h>
#endif
-typedef struct fsid { int32_t val[2]; } fsid_t; /* file system id type */
+#include <sys/_types/_fsid_t.h> /* file system id type */
/*
* file system statistics
*/
#define MFSNAMELEN 15 /* length of fs type name, not inc. null */
-#define MNAMELEN 90 /* length of buffer for returned name */
+#define MFSTYPENAMELEN 16 /* length of fs type name including null */
+
+#if __DARWIN_64_BIT_INO_T
+#define MNAMELEN MAXPATHLEN /* length of buffer for returned name */
+#else /* ! __DARWIN_64_BIT_INO_T */
+#define MNAMELEN 90 /* length of buffer for returned name */
+#endif /* __DARWIN_64_BIT_INO_T */
+
+#define __DARWIN_STRUCT_STATFS64 { \
+ uint32_t f_bsize; /* fundamental file system block size */ \
+ int32_t f_iosize; /* optimal transfer block size */ \
+ uint64_t f_blocks; /* total data blocks in file system */ \
+ uint64_t f_bfree; /* free blocks in fs */ \
+ uint64_t f_bavail; /* free blocks avail to non-superuser */ \
+ uint64_t f_files; /* total file nodes in file system */ \
+ uint64_t f_ffree; /* free file nodes in fs */ \
+ fsid_t f_fsid; /* file system id */ \
+ uid_t f_owner; /* user that mounted the filesystem */ \
+ uint32_t f_type; /* type of filesystem */ \
+ uint32_t f_flags; /* copy of mount exported flags */ \
+ uint32_t f_fssubtype; /* fs sub-type (flavor) */ \
+ char f_fstypename[MFSTYPENAMELEN]; /* fs type name */ \
+ char f_mntonname[MAXPATHLEN]; /* directory on which mounted */ \
+ char f_mntfromname[MAXPATHLEN]; /* mounted filesystem */ \
+ uint32_t f_reserved[8]; /* For future use */ \
+}
+
+#if !__DARWIN_ONLY_64_BIT_INO_T
+
+struct statfs64 __DARWIN_STRUCT_STATFS64;
+
+#endif /* !__DARWIN_ONLY_64_BIT_INO_T */
+
+#if __DARWIN_64_BIT_INO_T
+
+struct statfs __DARWIN_STRUCT_STATFS64;
+
+#else /* !__DARWIN_64_BIT_INO_T */
/*
* LP64 - WARNING - must be kept in sync with struct user_statfs in mount_internal.h.
uid_t f_owner; /* user that mounted the filesystem */
short f_reserved1; /* spare for later */
short f_type; /* type of filesystem */
- long f_flags; /* copy of mount exported flags */
+ long f_flags; /* copy of mount exported flags */
long f_reserved2[2]; /* reserved for future use */
char f_fstypename[MFSNAMELEN]; /* fs type name */
char f_mntonname[MNAMELEN]; /* directory on which mounted */
char f_mntfromname[MNAMELEN];/* mounted filesystem */
-#if COMPAT_GETFSSTAT
- char f_reserved3[0]; /* For alignment */
- long f_reserved4[0]; /* For future use */
-#else
char f_reserved3; /* For alignment */
long f_reserved4[4]; /* For future use */
-#endif
};
-
-#define MFSTYPENAMELEN 16 /* length of fs type name including null */
+#endif /* __DARWIN_64_BIT_INO_T */
#pragma pack(4)
#pragma pack()
+#ifdef KERNEL
+/*
+ * Kernel level support for the VFS_GETATTR(), VFS_SETATTR() for use in
+ * implementation of filesystem KEXTs, and by the vfs_getattr() and
+ * vfs_setattr() KPIs.
+ */
+
#define VFSATTR_INIT(s) ((s)->f_supported = (s)->f_active = 0LL)
#define VFSATTR_SET_SUPPORTED(s, a) ((s)->f_supported |= VFSATTR_ ## a)
#define VFSATTR_IS_SUPPORTED(s, a) ((s)->f_supported & VFSATTR_ ## a)
#define VFSATTR_f_vol_name (1LL<< 21)
#define VFSATTR_f_signature (1LL<< 22)
#define VFSATTR_f_carbon_fsid (1LL<< 23)
+#define VFSATTR_f_uuid (1LL<< 24)
/*
- * New VFS_STAT argument structure.
+ * Argument structure.
*/
#pragma pack(4)
-
+/*
+ * Note: the size of the vfs_attr structure can change.
+ * A kext should only reference the fields that are
+ * marked as active; it should not depend on the actual
+ * size of the structure or attempt to copy it.
+ */
struct vfs_attr {
uint64_t f_supported;
uint64_t f_active;
uint16_t f_signature; /* used for ATTR_VOL_SIGNATURE, Carbon's FSVolumeInfo.signature */
uint16_t f_carbon_fsid; /* same as Carbon's FSVolumeInfo.filesystemID */
+ uuid_t f_uuid; /* file system UUID (version 3 or 5), available in 10.6 and later */
};
#pragma pack()
+#endif /* KERNEL */
+
/*
* User specifiable flags.
*
#define MNT_NODEV 0x00000010 /* don't interpret special files */
#define MNT_UNION 0x00000020 /* union with underlying filesystem */
#define MNT_ASYNC 0x00000040 /* file system written asynchronously */
-#define MNT_DONTBROWSE 0x00100000 /* file system is not appropriate path to user data */
-#define MNT_IGNORE_OWNERSHIP 0x00200000 /* VFS will ignore ownership information on filesystem
- * objects */
-#define MNT_AUTOMOUNTED 0x00400000 /* filesystem was mounted by automounter */
-#define MNT_JOURNALED 0x00800000 /* filesystem is journaled */
-#define MNT_NOUSERXATTR 0x01000000 /* Don't allow user extended attributes */
-#define MNT_DEFWRITE 0x02000000 /* filesystem should defer writes */
-
-/* backwards compatibility only */
-#define MNT_UNKNOWNPERMISSIONS MNT_IGNORE_OWNERSHIP
+#define MNT_CPROTECT 0x00000080 /* file system supports content protection */
/*
* NFS export related mount flags.
*/
#define MNT_EXPORTED 0x00000100 /* file system is exported */
+/*
+ * MAC labeled / "quarantined" flag
+ */
+#define MNT_QUARANTINE 0x00000400 /* file system is quarantined */
+
/*
* Flags set by internal operations.
*/
#define MNT_LOCAL 0x00001000 /* filesystem is stored locally */
#define MNT_QUOTA 0x00002000 /* quotas are enabled on filesystem */
#define MNT_ROOTFS 0x00004000 /* identifies the root filesystem */
-#define MNT_DOVOLFS 0x00008000 /* FS supports volfs */
+#define MNT_DOVOLFS 0x00008000 /* FS supports volfs (deprecated flag in Mac OS X 10.5) */
+
+
+#define MNT_DONTBROWSE 0x00100000 /* file system is not appropriate path to user data */
+#define MNT_IGNORE_OWNERSHIP 0x00200000 /* VFS will ignore ownership information on filesystem objects */
+#define MNT_AUTOMOUNTED 0x00400000 /* filesystem was mounted by automounter */
+#define MNT_JOURNALED 0x00800000 /* filesystem is journaled */
+#define MNT_NOUSERXATTR 0x01000000 /* Don't allow user extended attributes */
+#define MNT_DEFWRITE 0x02000000 /* filesystem should defer writes */
+#define MNT_MULTILABEL 0x04000000 /* MAC support for individual labels */
+#define MNT_NOATIME 0x10000000 /* disable update of file access time */
+#ifdef BSD_KERNEL_PRIVATE
+/* #define MNT_IMGSRC_BY_INDEX 0x20000000 see sys/imgsrc.h */
+#endif /* BSD_KERNEL_PRIVATE */
+
+/* backwards compatibility only */
+#define MNT_UNKNOWNPERMISSIONS MNT_IGNORE_OWNERSHIP
+
/*
* XXX I think that this could now become (~(MNT_CMDFLAGS))
*/
#define MNT_VISFLAGMASK (MNT_RDONLY | MNT_SYNCHRONOUS | MNT_NOEXEC | \
MNT_NOSUID | MNT_NODEV | MNT_UNION | \
- MNT_ASYNC | MNT_EXPORTED | \
- MNT_LOCAL | MNT_QUOTA | \
+ MNT_ASYNC | MNT_EXPORTED | MNT_QUARANTINE | \
+ MNT_LOCAL | MNT_QUOTA | \
MNT_ROOTFS | MNT_DOVOLFS | MNT_DONTBROWSE | \
- MNT_UNKNOWNPERMISSIONS | MNT_AUTOMOUNTED | MNT_JOURNALED | \
- MNT_DEFWRITE)
+ MNT_IGNORE_OWNERSHIP | MNT_AUTOMOUNTED | MNT_JOURNALED | \
+ MNT_NOUSERXATTR | MNT_DEFWRITE | MNT_MULTILABEL | \
+ MNT_NOATIME | MNT_CPROTECT)
/*
* External filesystem command modifier flags.
* Unmount can use the MNT_FORCE flag.
* External filesystem control flags.
*/
#define MNT_UPDATE 0x00010000 /* not a real mount, just an update */
+#define MNT_NOBLOCK 0x00020000 /* don't block unmount if not responding */
#define MNT_RELOAD 0x00040000 /* reload filesystem data */
#define MNT_FORCE 0x00080000 /* force unmount or readonly change */
-#define MNT_CMDFLAGS (MNT_UPDATE|MNT_RELOAD|MNT_FORCE)
+#define MNT_CMDFLAGS (MNT_UPDATE|MNT_NOBLOCK|MNT_RELOAD|MNT_FORCE)
#define VFS_MAXTYPENUM 1 /* int: highest defined filesystem type */
#define VFS_CONF 2 /* struct: vfsconf for filesystem given
as next argument */
-#define VFS_SET_PACKAGE_EXTS 3 /* set package extension list */
/*
* Flags for various system call interfaces.
*
* waitfor flags to vfs_sync() and getfsstat()
*/
-#define MNT_WAIT 1 /* synchronously wait for I/O to complete */
+#define MNT_WAIT 1 /* synchronized I/O file integrity completion */
#define MNT_NOWAIT 2 /* start all I/O, but do not wait for it */
+#define MNT_DWAIT 4 /* synchronized I/O data integrity completion */
#ifndef KERNEL
typedef struct vnode * vnode_t;
#endif
+/* Reserved fields preserve binary compatibility */
struct vfsconf {
- struct vfsops *vfc_vfsops; /* filesystem operations vector */
+ uint32_t vfc_reserved1; /* opaque */
char vfc_name[MFSNAMELEN]; /* filesystem type name */
int vfc_typenum; /* historic filesystem type number */
int vfc_refcount; /* number mounted of this type */
int vfc_flags; /* permanent flags */
- int (*vfc_mountroot)(mount_t, vnode_t); /* if != NULL, routine to mount root */
- struct vfsconf *vfc_next; /* next in list */
+ uint32_t vfc_reserved2; /* opaque */
+ uint32_t vfc_reserved3; /* opaque */
};
struct vfsidctl {
#define VFS_CTL_VERS1 0x01
#ifdef KERNEL
-// LP64todo - should this move?
-
-/* LP64 version of vfsconf. all pointers
- * grow when we're dealing with a 64-bit process.
- * WARNING - keep in sync with vfsconf
- */
-struct user_vfsconf {
- user_addr_t vfc_vfsops; /* filesystem operations vector */
- char vfc_name[MFSNAMELEN]; /* filesystem type name */
- int vfc_typenum; /* historic filesystem type number */
- int vfc_refcount; /* number mounted of this type */
- int vfc_flags; /* permanent flags */
- user_addr_t vfc_mountroot __attribute((aligned(8))); /* if != NULL, routine to mount root */
- user_addr_t vfc_next; /* next in list */
-};
-
struct user_vfsidctl {
int vc_vers; /* should be VFSIDCTL_VERS1 (below) */
fsid_t vc_fsid; /* fsid to operate on. */
u_int32_t vc_spare[12]; /* spare (must be zero). */
};
+struct user32_vfsidctl {
+ int vc_vers; /* should be VFSIDCTL_VERS1 (below) */
+ fsid_t vc_fsid; /* fsid to operate on. */
+ user32_addr_t vc_ptr; /* pointer to data structure. */
+ user32_size_t vc_len; /* sizeof said structure. */
+ u_int32_t vc_spare[12]; /* spare (must be zero). */
+};
+
+union union_vfsidctl { /* the fields vc_vers and vc_fsid are compatible */
+ struct user32_vfsidctl vc32;
+ struct user_vfsidctl vc64;
+};
+
#endif /* KERNEL */
/*
#define VFS_CTL_NEWADDR 0x00010004 /* reconnect to new address */
#define VFS_CTL_TIMEO 0x00010005 /* set timeout for vfs notification */
#define VFS_CTL_NOLOCKS 0x00010006 /* disable file locking */
+#define VFS_CTL_SADDR 0x00010007 /* get server address */
+#define VFS_CTL_DISC 0x00010008 /* server disconnected */
+#define VFS_CTL_SERVERINFO 0x00010009 /* information about fs server */
+#define VFS_CTL_NSTATUS 0x0001000A /* netfs mount status */
struct vfsquery {
u_int32_t vq_flags;
u_int32_t vq_spare[31];
};
+struct vfs_server {
+ int32_t vs_minutes; /* minutes until server goes down. */
+ u_int8_t vs_server_name[MAXHOSTNAMELEN*3]; /* UTF8 server name to display (null terminated) */
+};
+
+/*
+ * NetFS mount status - returned by VFS_CTL_NSTATUS
+ */
+struct netfs_status {
+ u_int32_t ns_status; // Current status of mount (vfsquery flags)
+ char ns_mountopts[512]; // Significant mount options
+ uint32_t ns_waittime; // Time waiting for reply (sec)
+ uint32_t ns_threadcount; // Number of threads blocked on network calls
+ uint64_t ns_threadids[0]; // Thread IDs of those blocked threads
+};
+
/* vfsquery flags */
#define VQ_NOTRESP 0x0001 /* server down */
#define VQ_NEEDAUTH 0x0002 /* server bad auth */
#define VQ_ASSIST 0x0040 /* filesystem needs assistance from external program */
#define VQ_NOTRESPLOCK 0x0080 /* server lockd down */
#define VQ_UPDATE 0x0100 /* filesystem information has changed */
-#define VQ_FLAG0200 0x0200 /* placeholder */
-#define VQ_FLAG0400 0x0400 /* placeholder */
-#define VQ_FLAG0800 0x0800 /* placeholder */
-#define VQ_FLAG1000 0x1000 /* placeholder */
+#define VQ_VERYLOWDISK 0x0200 /* file system has *very* little disk space left */
+#define VQ_SYNCEVENT 0x0400 /* a sync just happened (not set by kernel starting Mac OS X 10.9) */
+#define VQ_SERVEREVENT 0x0800 /* server issued notification/warning */
+#define VQ_QUOTA 0x1000 /* a user quota has been hit */
#define VQ_FLAG2000 0x2000 /* placeholder */
#define VQ_FLAG4000 0x4000 /* placeholder */
#define VQ_FLAG8000 0x8000 /* placeholder */
u_int32_t io_maxsegreadsize; /* Max. segment read size */
u_int32_t io_maxsegwritesize; /* Max. segment write size */
u_int32_t io_devblocksize; /* the underlying device block size */
- void * io_reserved[3]; /* extended attribute information */
+ u_int32_t io_flags; /* flags for underlying device */
+ union {
+ int64_t io_max_swappin_available;
+ // On 32 bit architectures, we don't have any spare
+ void *io_reserved[2];
+ };
};
+#define VFS_IOATTR_FLAGS_FUA 0x00000001 /* Write-through cache supported */
+#define VFS_IOATTR_FLAGS_UNMAP 0x00000002 /* Unmap (trim) supported */
+#define VFS_IOATTR_FLAGS_SWAPPIN_SUPPORTED 0x00000010 /* Pinning swap file supported */
/*
* Filesystem Registration information
*/
+#define VFS_TBLTHREADSAFE 0x0001 /* Only threadsafe filesystems are supported */
+#define VFS_TBLFSNODELOCK 0x0002 /* Only threadsafe filesystems are supported */
+#define VFS_TBLNOTYPENUM 0x0008
+#define VFS_TBLLOCALVOL 0x0010
+#define VFS_TBL64BITREADY 0x0020
+#define VFS_TBLNATIVEXATTR 0x0040
+#define VFS_TBLDIRLINKS 0x0080
+#define VFS_TBLUNMOUNT_PREFLIGHT 0x0100 /* does a preflight check before unmounting */
+#define VFS_TBLGENERICMNTARGS 0x0200 /* force generic mount args for local fs */
+#define VFS_TBLREADDIR_EXTENDED 0x0400 /* fs supports VNODE_READDIR_EXTENDED */
+#define VFS_TBLNOMACLABEL 0x1000
+#define VFS_TBLVNOP_PAGEINV2 0x2000
+#define VFS_TBLVNOP_PAGEOUTV2 0x4000
+#define VFS_TBLVNOP_NOUPDATEID_RENAME 0x8000 /* vfs should not call vnode_update_ident on rename */
+#define VFS_TBLVNOP_SECLUDE_RENAME 0x10000
+#define VFS_TBLCANMOUNTROOT 0x20000
-#define VFS_TBLTHREADSAFE 0x01
-#define VFS_TBLFSNODELOCK 0x02
-#define VFS_TBLNOTYPENUM 0x08
-#define VFS_TBLLOCALVOL 0x10
-#define VFS_TBL64BITREADY 0x20
struct vfs_fsentry {
struct vfsops * vfe_vfsops; /* vfs operations */
struct vfsops {
+ /*!
+ @function vfs_mount
+ @abstract Perform filesystem-specific operations required for mounting.
+ @discussion Typical operations include setting the mount-specific data with vfs_setfsprivate().
+ Note that if a mount call fails, the filesystem must clean up any state it has constructed, because
+ vfs-level mount code will not clean it up.
+ @param mp Mount structure for the newly mounted filesystem.
+ @param devvp Device that the filesystem is mounted from.
+ @param data Filesystem-specific data passed down from userspace.
+ @param context Context to authenticate for mount.
+ @return 0 for success, else an error code. Once success is returned, the filesystem should be ready to go active;
+ VFS will not ask again.
+ */
int (*vfs_mount)(struct mount *mp, vnode_t devvp, user_addr_t data, vfs_context_t context);
+
+ /*!
+ @function vfs_start
+ @abstract Mark a mount as ready to be used.
+ @discussion After receiving this calldown, a filesystem will be hooked into the mount list and should expect
+ calls down from the VFS layer.
+ @param mp Mount structure being activated.
+ @param flags Unused.
+ @param context Context to authenticate for mount.
+ @return Return value is ignored.
+ */
int (*vfs_start)(struct mount *mp, int flags, vfs_context_t context);
+
+ /*!
+ @function vfs_unmount
+ @abstract Perform filesystem-specific cleanup as part of unmount.
+ @discussion If the unmount downcall succeeds, VFS considers itself authorized to destroy all
+ state related to the mount.
+ @param mp Mount structure to unmount.
+ @param mntflags MNT_FORCE indicates that we wish to unmount even if there are active vnodes.
+ @param context Context to authenticate for unmount.
+ @return 0 for success, else an error code.
+ */
int (*vfs_unmount)(struct mount *mp, int mntflags, vfs_context_t context);
+
+ /*!
+ @function vfs_root
+ @abstract Get the root vnode of a filesystem.
+ @discussion Upon success, should return with an iocount held on the root vnode which the caller will
+ drop with vnode_put().
+ @param mp Mount for which to get the root.
+ @param vpp Destination for root vnode.
+ @param context Context to authenticate for getting the root.
+ @return 0 for success, else an error code.
+ */
int (*vfs_root)(struct mount *mp, struct vnode **vpp, vfs_context_t context);
+
+ /*!
+ @function vfs_quotactl
+ @abstract Manipulate quotas for a volume.
+ @param mp Mount for which to manipulate quotas.
+ @param cmds Detailed in "quotactl" manual page.
+ @param uid Detailed in "quotactl" manual page.
+ @param arg Detailed in "quotactl" manual page.
+ @param context Context to authenticate for changing quotas.
+ @return 0 for success, else an error code.
+ */
int (*vfs_quotactl)(struct mount *mp, int cmds, uid_t uid, caddr_t arg, vfs_context_t context);
+
+ /*!
+ @function vfs_getattr
+ @abstract Get filesystem attributes.
+ @discussion See VFSATTR_RETURN, VFSATTR_ACTIVE, VFSATTR_SET_SUPPORTED, VFSATTR_WANTED macros.
+ @param mp Mount for which to get parameters.
+ @param vfa Container for specifying which attributes are desired and which attributes the filesystem
+ supports, as well as for returning results.
+ @param ctx Context to authenticate for getting filesystem attributes.
+ @return 0 for success, else an error code.
+ */
int (*vfs_getattr)(struct mount *mp, struct vfs_attr *, vfs_context_t context);
/* int (*vfs_statfs)(struct mount *mp, struct vfsstatfs *sbp, vfs_context_t context);*/
+
+ /*!
+ @function vfs_sync
+ @abstract Flush all filesystem data to backing store.
+ @discussion vfs_sync will be called as part of the sync() system call and during unmount.
+ @param mp Mountpoint to sync.
+ @param waitfor MNT_WAIT: flush synchronously, waiting for all data to be written before returning. MNT_NOWAIT: start I/O but do not wait for it.
+ @param ctx Context to authenticate for the sync.
+ @return 0 for success, else an error code.
+ */
int (*vfs_sync)(struct mount *mp, int waitfor, vfs_context_t context);
+
+ /*!
+ @function vfs_vget
+ @abstract Get a vnode by file id (inode number).
+ @discussion This routine is chiefly used to build paths to vnodes. Result should be turned with an iocount that the
+ caller will drop with vnode_put().
+ @param mp Mount against which to look up inode number.
+ @param ino File ID for desired file, as found through a readdir.
+ @param vpp Destination for vnode.
+ @return 0 for success, else an error code.
+ */
int (*vfs_vget)(struct mount *mp, ino64_t ino, struct vnode **vpp, vfs_context_t context);
+
+ /*!
+ @function vfs_fhtovp
+ @abstract Get the vnode corresponding to a file handle.
+ @discussion Filesystems can return handles to files which are independent of their (transient) vnode identities.
+ vfs_thtovp converts that persistent handle back to a vnode. The vnode should be returned with an iocount which
+ the caller will drop with vnode_put().
+ @param mp Mount against which to look up file handle.
+ @param fhlen Size of file handle structure, as returned by vfs_vptofh.
+ @param fhp Pointer to handle.
+ @param vpp Destination for vnode.
+ @param ctx Context against which to authenticate the file-handle conversion.
+ @return 0 for success, else an error code.
+ */
int (*vfs_fhtovp)(struct mount *mp, int fhlen, unsigned char *fhp, struct vnode **vpp,
vfs_context_t context);
+
+ /*!
+ @function vfs_vptofh
+ @abstract Get a persistent handle corresponding to a vnode.
+ @param mp Mount against which to convert the vnode to a handle.
+ @param fhlen Size of buffer provided for handle; set to size of actual handle returned.
+ @param fhp Pointer to buffer in which to place handle data.
+ @param ctx Context against which to authenticate the file-handle request.
+ @return 0 for success, else an error code.
+ */
int (*vfs_vptofh)(struct vnode *vp, int *fhlen, unsigned char *fhp, vfs_context_t context);
+
+ /*!
+ @function vfs_init
+ @abstract Prepare a filesystem for having instances mounted.
+ @discussion This routine is called once, before any particular instance of a filesystem
+ is mounted; it allows the filesystem to initialize whatever global data structures
+ are shared across all mounts. If this returns successfully, a filesystem should be ready to have
+ instances mounted.
+ @param vfsconf Configuration information. Currently, the only useful data are the filesystem name,
+ typenum, and flags. The flags field will be either 0 or MNT_LOCAL. Many filesystems ignore this
+ parameter.
+ @return 0 for success, else an error code.
+ */
int (*vfs_init)(struct vfsconf *);
+
+ /*!
+ @function vfs_sysctl
+ @abstract Broad interface for querying and controlling filesystem.
+ @discussion VFS defines VFS_CTL_QUERY as a generic status request which is answered
+ with the VQ_* macros in a "struct vfsquery."
+ A filesystem may also define implementation-specific commands. See "man 3 sysctl"
+ for the meaning of sysctl parameters.
+ @param context Context against which to authenticate command.
+ @return 0 for success, else an error code.
+ */
int (*vfs_sysctl)(int *, u_int, user_addr_t, size_t *, user_addr_t, size_t, vfs_context_t context);
+
+ /*!
+ @function vfs_setattr
+ @abstract Set filesystem attributes.
+ @discussion The other side of the vfs_getattr coin. Currently only called to set volume name.
+ @param mp Mount on which to set attributes.
+ @param vfa VFS attribute structure containing requested attributes to set and their values. Currently
+ will only be called with f_vol_name set.
+ @param context Context against which to authenticate attribute change.
+ @return 0 for success, else an error code.
+ */
int (*vfs_setattr)(struct mount *mp, struct vfs_attr *, vfs_context_t context);
- void *vfs_reserved[7];
+
+ /*!
+ @function vfs_ioctl
+ @abstract File system control operations.
+ @discussion Unlike vfs_sysctl, this is specific to a particular volume.
+ @param mp The mount to execute the command on.
+ @param command Identifier for action to take. The command used here
+ should be in the same namespace as VNOP ioctl commands.
+ @param data Pointer to data; this can be an integer constant (of 32 bits
+ only) or an address to be read from or written to, depending on "command."
+ If it is an address, it is valid and resides in the kernel; callers of
+ VFS_IOCTL() are responsible for copying to and from userland.
+ @param flags Reserved for future use, set to zero
+ @param ctx Context against which to authenticate ioctl request.
+ @return 0 for success, else an error code.
+ */
+ int (*vfs_ioctl)(struct mount *mp, u_long command, caddr_t data,
+ int flags, vfs_context_t context);
+
+ /*!
+ @function vfs_vget_snapdir
+ @abstract Get the vnode for the snapshot directory of a filesystem.
+ @discussion Upon success, should return with an iocount held on the root vnode which the caller will
+ drop with vnode_put().
+ @param mp Mount for which to get the root.
+ @param vpp Destination for snapshot directory vnode.
+ @param context Context to authenticate for getting the snapshot directory.
+ @return 0 for success, else an error code.
+ */
+ int (*vfs_vget_snapdir)(struct mount *mp, struct vnode **vpp, vfs_context_t context);
+ void *vfs_reserved5;
+ void *vfs_reserved4;
+ void *vfs_reserved3;
+ void *vfs_reserved2;
+ void *vfs_reserved1;
+};
+
+#ifdef KERNEL
+
+/*
+ * Commands for vfs_ioctl. While they are encoded the same way as for ioctl(2),
+ * there is no generic interface for them from userspace like ioctl(2).
+ */
+struct fs_snapshot_mount_args {
+ mount_t sm_mp;
+ struct componentname *sm_cnp;
};
+#define VFSIOC_MOUNT_SNAPSHOT _IOW('V', 1, struct fs_snapshot_mount_args)
+#define VFSCTL_MOUNT_SNAPSHOT IOCBASECMD(VFSIOC_MOUNT_SNAPSHOT)
+
+struct fs_snapshot_revert_args {
+ struct componentname *sr_cnp;
+};
+#define VFSIOC_REVERT_SNAPSHOT _IOW('V', 2, struct fs_snapshot_revert_args)
+#define VFSCTL_REVERT_SNAPSHOT IOCBASECMD(VFSIOC_REVERT_SNAPSHOT)
+
+#endif /* KERNEL */
/*
* flags passed into vfs_iterate
*/
+#ifdef PRIVATE
+#define VFS_ITERATE_TAIL_FIRST (1 << 0)
+#define VFS_ITERATE_CB_DROPREF (1 << 1) // Callback will drop the iterref
+#endif /* PRIVATE */
/*
* return values from callback
__BEGIN_DECLS
-/*
- * prototypes for exported VFS operations
- */
+#ifdef BSD_KERNEL_PRIVATE
extern int VFS_MOUNT(mount_t, vnode_t, user_addr_t, vfs_context_t);
extern int VFS_START(mount_t, int, vfs_context_t);
extern int VFS_UNMOUNT(mount_t, int, vfs_context_t);
extern int VFS_ROOT(mount_t, vnode_t *, vfs_context_t);
extern int VFS_QUOTACTL(mount_t, int, uid_t, caddr_t, vfs_context_t);
+extern int VFS_GETATTR(mount_t, struct vfs_attr *, vfs_context_t);
+extern int VFS_SETATTR(mount_t, struct vfs_attr *, vfs_context_t);
extern int VFS_SYNC(mount_t, int, vfs_context_t);
extern int VFS_VGET(mount_t, ino64_t, vnode_t *, vfs_context_t);
extern int VFS_FHTOVP(mount_t, int, unsigned char *, vnode_t *, vfs_context_t);
extern int VFS_VPTOFH(vnode_t, int *, unsigned char *, vfs_context_t);
+extern int VFS_IOCTL(mount_t mp, u_long command, caddr_t data,
+ int flags, vfs_context_t context);
+extern int VFS_VGET_SNAPDIR(mount_t, vnode_t *, vfs_context_t);
+#endif /* BSD_KERNEL_PRIVATE */
+/*
+ * prototypes for exported VFS operations
+ */
-/* The file system registrartion KPI */
-int vfs_fsadd(struct vfs_fsentry *, vfstable_t *);
-int vfs_fsremove(vfstable_t);
-int vfs_iterate(int, int (*)(struct mount *, void *), void *);
-
-uint64_t vfs_flags(mount_t);
-void vfs_setflags(mount_t, uint64_t);
-void vfs_clearflags(mount_t, uint64_t);
-
-int vfs_issynchronous(mount_t);
-int vfs_iswriteupgrade(mount_t);
-int vfs_isupdate(mount_t);
-int vfs_isreload(mount_t);
-int vfs_isforce(mount_t);
-int vfs_isrdonly(mount_t);
-int vfs_isrdwr(mount_t);
-int vfs_authopaque(mount_t);
-int vfs_authopaqueaccess(mount_t);
-void vfs_setauthopaque(mount_t);
-void vfs_setauthopaqueaccess(mount_t);
-void vfs_clearauthopaque(mount_t);
-void vfs_clearauthopaqueaccess(mount_t);
-int vfs_extendedsecurity(mount_t);
-void vfs_setextendedsecurity(mount_t);
-void vfs_clearextendedsecurity(mount_t);
-void vfs_setlocklocal(mount_t);
-
-
-
-uint32_t vfs_maxsymlen(mount_t);
-void vfs_setmaxsymlen(mount_t, uint32_t);
-void * vfs_fsprivate(mount_t);
-void vfs_setfsprivate(mount_t, void *mntdata);
+/*!
+ @function vfs_fsadd
+ @abstract Register a filesystem with VFS.
+ @discussion Typically called by a filesystem Kernel Extension when it is loaded.
+ @param vfe Filesystem information: table of vfs operations, list of vnode operation tables,
+ filesystem type number (can be omitted with VFS_TBLNOTYPENUM flag), name, flags.
+ @param handle Opaque handle which will be passed to vfs_fsremove.
+ @return 0 for success, else an error code.
+ */
+int vfs_fsadd(struct vfs_fsentry *vfe, vfstable_t *handle);
+
+/*!
+ @function vfs_fsremove
+ @abstract Unregister a filesystem with VFS.
+ @discussion Typically called by a filesystem Kernel Extension when it is unloaded.
+ @param handle Handle which was returned by vfs_fsadd.
+ @return 0 for success, else an error code.
+ */
+int vfs_fsremove(vfstable_t handle);
+
+/*!
+ @function vfs_iterate
+ @abstract Iterate over all mountpoints with a callback. Used, for example, by sync().
+ @param flags Unused.
+ @param callout Function which takes a mount and arbitrary passed-in "arg," and returns one of VFS_RETURNED_DONE or VFS_CLAIMED_DONE: end
+ iteration and return success. VFS_RETURNED or VFS_CLAIMED: continue iterating. Anything else: continue iterating.
+ @param arg Arbitrary data to pass to callback.
+ @return 0 for success, else an error code.
+ */
+int vfs_iterate(int flags, int (*callout)(struct mount *, void *), void *arg);
+
+/*!
+ @function vfs_init_io_attributes
+ @abstract Set I/O attributes on a mountpoint based on device properties.
+ @param devvp Block device vnode from which a filesystem is being mounted.
+ @param mp Mountpoint whose I/O parameters to initialize.
+ @return 0 for success, else an error code.
+ */
+int vfs_init_io_attributes(vnode_t devvp, mount_t mp);
+
+/*!
+ @function vfs_flags
+ @abstract Retrieve mount flags.
+ @discussion Results will be in the bitwise "OR" of MNT_VISFLAGMASK and MNT_CMDFLAGS.
+ @param mp Mount whose flags to grab.
+ @return Flags.
+ */
+uint64_t vfs_flags(mount_t mp);
+
+/*!
+ @function vfs_setflags
+ @abstract Set flags on a mount.
+ @discussion Sets mount flags to the bitwise "OR" of their current value and the specified bits. Often
+ used by a filesystem as part of the mount process.
+ @param mp Mount whose flags to set.
+ @param flags Flags to activate. Must be in the bitwise "OR" of MNT_VISFLAGMASK and MNT_CMDFLAGS.
+ */
+void vfs_setflags(mount_t mp, uint64_t flags);
+
+/*!
+ @function vfs_clearflags
+ @abstract Clear flags on a mount.
+ @discussion Sets mount flags to the bitwise "AND" of their current value and the complement of the specified bits.
+ @param mp Mount whose flags to set.
+ @param flags Flags to deactivate. Must be in the bitwise "OR" of MNT_VISFLAGMASK and MNT_CMDFLAGS.
+ */
+void vfs_clearflags(mount_t mp, uint64_t flags);
+
+/*!
+ @function vfs_issynchronous
+ @abstract Determine if writes to a filesystem occur synchronously.
+ @param mp Mount to test.
+ @return Nonzero if writes occur synchronously, else 0.
+ */
+int vfs_issynchronous(mount_t mp);
+
+/*!
+ @function vfs_iswriteupgrade
+ @abstract Determine if a filesystem is mounted read-only but a request has been made to upgrade
+ to read-write.
+ @param mp Mount to test.
+ @return Nonzero if a request has been made to update from read-only to read-write, else 0.
+ */
+int vfs_iswriteupgrade(mount_t mp);
+
+/*!
+ @function vfs_isupdate
+ @abstract Determine if a mount update is in progress.
+ @param mp Mount to test.
+ @return Nonzero if a mount update is in progress, 0 otherwise.
+ */
+int vfs_isupdate(mount_t mp);
+
+/*!
+ @function vfs_isreload
+ @abstract Determine if a reload of filesystem data is in progress. This can only be the case
+ for a read-only filesystem; all data is brought in from secondary storage.
+ @param mp Mount to test.
+ @return Nonzero if a request has been made to reload data, else 0.
+ */
+int vfs_isreload(mount_t mp);
+
+/*!
+ @function vfs_isforce
+ @abstract Determine if a forced unmount is in progress.
+ @discussion A forced unmount invalidates open files.
+ @param mp Mount to test.
+ @return Nonzero if a request has been made to forcibly unmount, else 0.
+ */
+int vfs_isforce(mount_t mp);
+
+/*!
+ @function vfs_isunmount
+ @abstract Determine if an unmount is in progress.
+ @discussion This is an unsynchronized snapshot of the mount state. It should only be called
+ if the mount is known to be valid, e.g. there are known to be live files on that volume.
+ @param mp Mount to test.
+ @return Nonzero if an unmount is in progress, else zero.
+ */
+int vfs_isunmount(mount_t mp);
+
+/*!
+ @function vfs_isrdonly
+ @abstract Determine if a filesystem is mounted read-only.
+ @param mp Mount to test.
+ @return Nonzero if filesystem is mounted read-only, else 0.
+ */
+int vfs_isrdonly(mount_t mp);
+
+/*!
+ @function vfs_isrdwr
+ @abstract Determine if a filesystem is mounted with writes enabled.
+ @param mp Mount to test.
+ @return Nonzero if filesystem is mounted read-write, else 0.
+ */
+int vfs_isrdwr(mount_t mp);
+
+/*!
+ @function vfs_authopaque
+ @abstract Determine if a filesystem's authorization decisions occur remotely.
+ @param mp Mount to test.
+ @return Nonzero if filesystem authorization is controlled remotely, else 0.
+ */
+int vfs_authopaque(mount_t mp);
+
+/*!
+ @function vfs_authopaqueaccess
+ @abstract Check if a filesystem is marked as having reliable remote VNOP_ACCESS support.
+ @param mp Mount to test.
+ @return Nonzero if VNOP_ACCESS is supported remotely, else 0.
+ */
+int vfs_authopaqueaccess(mount_t mp);
+
+/*!
+ @function vfs_setauthopaque
+ @abstract Mark a filesystem as having authorization decisions controlled remotely.
+ @param mp Mount to mark.
+ */
+void vfs_setauthopaque(mount_t mp);
+
+/*!
+ @function vfs_setauthopaqueaccess
+ @abstract Mark a filesystem as having remote VNOP_ACCESS support.
+ @param mp Mount to mark.
+ */
+void vfs_setauthopaqueaccess(mount_t mp);
+
+/*!
+ @function vfs_clearauthopaque
+ @abstract Mark a filesystem as not having remote authorization decisions.
+ @param mp Mount to mark.
+ */
+void vfs_clearauthopaque(mount_t mp);
+
+/*!
+ @function vfs_clearauthopaque
+ @abstract Mark a filesystem as not having remote VNOP_ACCESS support.
+ @param mp Mount to mark.
+ */
+void vfs_clearauthopaqueaccess(mount_t mp);
+
+/*!
+ @function vfs_setextendedsecurity
+ @abstract Mark a filesystem as supporting security controls beyond POSIX permissions.
+ @discussion Specific controls include ACLs, file owner UUIDs, and group UUIDs.
+ @param mp Mount to test.
+ */
+void vfs_setextendedsecurity(mount_t mp);
+
+/*!
+ @function vfs_clearextendedsecurity
+ @abstract Mark a filesystem as NOT supporting security controls beyond POSIX permissions.
+ @discussion Specific controls include ACLs, file owner UUIDs, and group UUIDs.
+ @param mp Mount to test.
+ */
+void vfs_clearextendedsecurity(mount_t mp);
+
+/*!
+ @function vfs_setlocklocal
+ @abstract Mark a filesystem as using VFS-level advisory locking support.
+ @discussion Advisory locking operations will not call down to the filesystem if this flag is set.
+ @param mp Mount to mark.
+ */
+void vfs_setlocklocal(mount_t mp);
+
+/*!
+ @function vfs_authcache_ttl
+ @abstract Determine the time-to-live of cached authorized credentials for files in this filesystem.
+ @discussion If a filesystem is set to allow caching credentials, the VFS layer can authorize
+ previously-authorized actions from the same vfs_context_t without calling down to the filesystem (though
+ it will not deny based on the cache).
+ @param mp Mount for which to check cache lifetime.
+ @return Cache lifetime in seconds. CACHED_RIGHT_INFINITE_TTL indicates that credentials never expire.
+ */
+int vfs_authcache_ttl(mount_t mp);
+
+/*!
+ @function vfs_setauthcache_ttl
+ @abstract Enable credential caching and set time-to-live of cached authorized credentials for files in this filesystem.
+ @discussion If a filesystem is set to allow caching credentials, the VFS layer can authorize
+ previously-authorized actions from the same vfs_context_t without calling down to the filesystem (though
+ it will not deny based on the cache).
+ @param mp Mount for which to set cache lifetime.
+ */
+void vfs_setauthcache_ttl(mount_t mp, int ttl);
+
+/*!
+ @function vfs_clearauthcache_ttl
+ @abstract Remove time-to-live controls for cached credentials on a filesytem. Filesystems with remote authorization
+ decisions (opaque) will still have KAUTH_VNODE_SEARCH rights cached for a default of CACHED_LOOKUP_RIGHT_TTL seconds.
+ @param mp Mount for which to clear cache lifetime.
+ */
+void vfs_clearauthcache_ttl(mount_t mp);
-struct vfsstatfs * vfs_statfs(mount_t);
-int vfs_update_vfsstat(mount_t, vfs_context_t);
+/*
+ * return value from vfs_cachedrights_ttl if
+ * neither MNTK_AUTH_OPAQUE | MNTK_AUTH_CACHE_TTL
+ * is set in mnt_kern_flag.. it indicates
+ * that no TTL is being applied to the vnode rights cache
+ */
+#define CACHED_RIGHT_INFINITE_TTL ~0
+
+/*!
+ @function vfs_maxsymlen
+ @abstract Get the maximum length of a symbolic link on a filesystem.
+ @param mp Mount from which to get symlink length cap.
+ @return Max symlink length.
+ */
+uint32_t vfs_maxsymlen(mount_t mp);
+
+/*!
+ @function vfs_setmaxsymlen
+ @abstract Set the maximum length of a symbolic link on a filesystem.
+ @param mp Mount on which to set symlink length cap.
+ @param symlen Length to set.
+ */
+void vfs_setmaxsymlen(mount_t mp, uint32_t symlen);
+
+/*!
+ @function vfs_fsprivate
+ @abstract Get filesystem-private mount data.
+ @discussion A filesystem generally has an internal mount structure which it attaches to the VFS-level mount structure
+ as part of the mounting process.
+ @param mp Mount for which to get private data.
+ @return Private data.
+ */
+void * vfs_fsprivate(mount_t mp);
+
+/*!
+ @function vfs_setfsprivate
+ @abstract Set filesystem-private mount data.
+ @discussion A filesystem generally has an internal mount structure which it attaches to the VFS-level mount structure
+ as part of the mounting process.
+ @param mp Mount for which to set private data.
+ */
+void vfs_setfsprivate(mount_t mp, void *mntdata);
+
+/*!
+ @function vfs_statfs
+ @abstract Get information about filesystem status.
+ @discussion Each filesystem has a struct vfsstatfs associated with it which is updated as events occur; this function
+ returns a pointer to it. Note that the data in the structure will continue to change over time and also that it may
+ be quite stale of vfs_update_vfsstat has not been called recently.
+ @param mp Mount for which to get vfsstatfs pointer.
+ @return Pointer to vfsstatfs.
+ */
+struct vfsstatfs * vfs_statfs(mount_t mp);
+#define VFS_USER_EVENT 0
+#define VFS_KERNEL_EVENT 1
+
+/*!
+ @function vfs_update_vfsstat
+ @abstract Update cached filesystem status information in the VFS mount structure.
+ @discussion Each filesystem has a struct vfsstatfs associated with it which is updated as events occur; this function
+ updates it so that the structure pointer returned by vfs_statfs() returns a pointer to fairly recent data.
+ @param mp Mount for which to update cached status information.
+ @param ctx Context to authenticate against for call down to filesystem.
+ @param eventtype VFS_USER_EVENT: need for update is driven by user-level request; perform additional authentication.
+ VFS_KERNEL_EVENT: need for update is driven by in-kernel events. Skip extra authentication.
+ @return 0 for success, or an error code for authentication failure or problem with call to filesystem to
+ request information.
+ */
+int vfs_update_vfsstat(mount_t mp, vfs_context_t ctx, int eventtype);
+
+/*!
+ @function vfs_typenum
+ @abstract Get (archaic) filesystem type number.
+ @discussion Filesystem type numbers are an old construct; most filesystems just get a number assigned based on
+ the order in which they are registered with the system.
+ @param mp Mount for which to get type number.
+ @return Type number.
+ */
+int vfs_typenum(mount_t mp);
+
+/*!
+ @function vfs_name
+ @abstract Copy filesystem name into a buffer.
+ @discussion Get filesystem name; this refers to the filesystem type of which a mount is an instantiation,
+ rather than a name specific to the mountpoint.
+ @param mp Mount for which to get name.
+ @param buffer Destination for name; length should be at least MFSNAMELEN.
+ */
+void vfs_name(mount_t mp, char *buffer);
+
+/*!
+ @function vfs_devblocksize
+ @abstract Get the block size of the device underlying a mount.
+ @param mp Mount for which to get block size.
+ @return Block size.
+ */
+int vfs_devblocksize(mount_t mp);
+
+/*!
+ @function vfs_ioattr
+ @abstract Get I/O attributes associated with a mounpoint.
+ @param mp Mount for which to get attributes. If NULL, system defaults are filled into ioattrp.
+ @param ioattrp Destination for results.
+ */
+void vfs_ioattr(mount_t mp, struct vfsioattr *ioattrp);
+
+/*!
+ @function vfs_setioattr
+ @abstract Set I/O attributes associated with a mounpoint.
+ @param mp Mount for which to set attributes.
+ @param ioattrp Structure containing I/O parameters; all fields must be filled in.
+ */
+void vfs_setioattr(mount_t mp, struct vfsioattr *ioattrp);
+
+/*!
+ @function vfs_64bitready
+ @abstract Check if the filesystem associated with a mountpoint is marked ready for interaction with 64-bit user processes.
+ @param mp Mount to test.
+ @return Nonzero if filesystem is ready for 64-bit; 0 otherwise.
+ */
+int vfs_64bitready(mount_t mp);
+
+
+#define LK_NOWAIT 1
+/*!
+ @function vfs_busy
+ @abstract "Busy" a mountpoint.
+ @discussion vfs_busy() will "busy" a mountpoint, preventing unmounts from taking off, by taking its reader-writer lock
+ in a shared manner. If a mount is dead,
+ it will fail; if an unmount is in progress, depending on flags, it will either fail immediately or block
+ until the unmount completes (then failing if the unmount has succeeded, or potentially succeeding if unmounting failed).
+ A successful vfs_busy() must be followed by a vfs_unbusy() to release the lock on the mount.
+ @param mp Mount to busy.
+ @param flags LK_NOWAIT: fail with ENOENT if an unmount is in progress.
+ @return 0 for success, with a lock held; an error code otherwise, with no lock held.
+ */
+int vfs_busy(mount_t mp, int flags);
+
+/*!
+ @function vfs_unbusy
+ @abstract "Unbusy" a mountpoint by releasing its read-write lock.
+ @discussion A successful vfs_busy() must be followed by a vfs_unbusy() to release the lock on the mount.
+ @param mp Mount to unbusy.
+ */
+void vfs_unbusy(mount_t mp);
+
+/*!
+ @function vfs_getnewfsid
+ @abstract Generate a unique filesystem ID for a mount and store it in the mount structure.
+ @discussion Filesystem IDs are returned as part of "struct statfs." This function is typically
+ called as part of file-system specific mount code (i.e. through VFS_MOUNT).
+ @param mp Mount to set an ID for.
+ */
+void vfs_getnewfsid(struct mount *mp);
+
+/*!
+ @function vfs_getvfs
+ @abstract Given a filesystem ID, look up a mount structure.
+ @param fsid Filesystem ID to look up.
+ @return Mountpoint if found, else NULL. Note unmounting mountpoints can be returned.
+ */
+mount_t vfs_getvfs(fsid_t *fsid);
+
+/*!
+ @function vfs_mountedon
+ @abstract Check whether a given block device has a filesystem mounted on it.
+ @discussion Note that this is NOT a check for a covered vnode (the directory upon which
+ a filesystem is mounted)--it is a test for whether a block device is being used as the source
+ of a filesystem. Note that a block device marked as being mounted on cannot be opened.
+ @param vp The vnode to test.
+ @return EBUSY if vnode is indeed the source of a filesystem; 0 if it is not.
+ */
+int vfs_mountedon(struct vnode *vp);
+
+/*!
+ @function vfs_unmountbyfsid
+ @abstract Find a filesystem by ID and unmount it.
+ @param fsid ID of filesystem to unmount, as found through (for example) statfs.
+ @param flags MNT_FORCE: forcibly invalidate files open on the mount (though in-flight I/O operations
+ will be allowed to complete).
+ @param ctx Context against which to authenticate unmount operation.
+ @return 0 for succcess, nonero for failure.
+ */
+int vfs_unmountbyfsid(fsid_t *fsid, int flags, vfs_context_t ctx);
+
+/*!
+ @function vfs_event_signal
+ @abstract Post a kqueue-style event on a filesystem (EVFILT_FS).
+ @param fsid Unused.
+ @param event Events to post.
+ @param data Unused.
+ */
+void vfs_event_signal(fsid_t *fsid, u_int32_t event, intptr_t data);
+
+/*!
+ @function vfs_event_init
+ @abstract This function should not be called by kexts.
+ */
+void vfs_event_init(void); /* XXX We should not export this */
+
+#ifdef KERNEL_PRIVATE
+int vfs_getbyid(fsid_t *fsid, ino64_t ino, vnode_t *vpp, vfs_context_t ctx);
int vfs_getattr(mount_t mp, struct vfs_attr *vfa, vfs_context_t ctx);
int vfs_setattr(mount_t mp, struct vfs_attr *vfa, vfs_context_t ctx);
+int vfs_extendedsecurity(mount_t);
+mount_t vfs_getvfs_by_mntonname(char *);
+vnode_t vfs_vnodecovered(mount_t mp); /* Returns vnode with an iocount that must be released with vnode_put() */
+vnode_t vfs_devvp(mount_t mp); /* Please see block comment with implementation */
+int vfs_nativexattrs (mount_t mp); /* whether or not the FS supports EAs natively */
+void * vfs_mntlabel(mount_t mp); /* Safe to cast to "struct label*"; returns "void*" to limit dependence of mount.h on security headers. */
+void vfs_setcompoundopen(mount_t mp);
+uint64_t vfs_throttle_mask(mount_t mp);
+int vfs_isswapmount(mount_t mp);
+
+struct vnode_trigger_info;
+
+/*!
+ @function vfs_addtrigger
+ @abstract Create an "external" trigger vnode: look up a vnode and mark it as
+ a trigger. Can only safely be called in the context of a callback set by
+ vfs_settriggercallback(). May only be used on a file which is not already
+ marked as a trigger.
+ @param relpath Path relative to root of mountpoint at which to mark trigger.
+ @param vtip Information about trigger; analogous to "vnode_trigger_param"
+ argument to vnode_create.
+ @param ctx Authorization context.
+ */
+int vfs_addtrigger(mount_t mp, const char *relpath, struct vnode_trigger_info *vtip, vfs_context_t ctx);
-int vfs_typenum(mount_t);
-void vfs_name(mount_t, char *);
-int vfs_devblocksize(mount_t);
-void vfs_ioattr(mount_t, struct vfsioattr *);
-void vfs_setioattr(mount_t, struct vfsioattr *);
-int vfs_64bitready(mount_t);
-
-
-int vfs_busy(mount_t, int);
-void vfs_unbusy(mount_t);
-
-void vfs_getnewfsid(struct mount *);
-mount_t vfs_getvfs(fsid_t *);
-mount_t vfs_getvfs_by_mntonname(u_char *);
-int vfs_mountedon(struct vnode *);
-void vfs_event_signal(fsid_t *, u_int32_t, intptr_t);
-void vfs_event_init(void);
+/*!
+ @enum vfs_trigger_callback_op_t
+ @abstract Operation to perform after an attempted unmount (successful or otherwise).
+ @constant VTC_REPLACE Unmount failed: attempt to replace triggers. Only valid
+ VFS operation to perform in this context is vfs_addtrigger().
+ @constant VTC_RELEASE Unmount succeeded: release external triggering context.
+ */
+typedef enum {
+ VTC_REPLACE,
+ VTC_RELEASE
+} vfs_trigger_callback_op_t;
+
+/*!
+ @typedef vfs_trigger_callback_t
+ @abstract Callback to be passed to vfs_settriggercallback() and invoked from
+ unmount context.
+ @param mp Mountpoint on which unmount is occurring.
+ @param op Operation (see vfs_trigger_callback_op_t)
+ @param data Context passed to vfs_settriggercallback()
+ @param ctx Authorization context in which unmount is occurring.
+ */
+typedef void vfs_trigger_callback_t(mount_t mp, vfs_trigger_callback_op_t op, void *data, vfs_context_t ctx);
+
+/*!
+ @function vfs_settriggercallback
+ @abstract Install a callback to be called after unmount attempts on a volume,
+ to restore triggers for failed unmounts and release state for successful ones.
+ @discussion Installs a callback which will be called in two situations: a
+ failed unmount where vnodes may have been reclaimed and a successful unmount.
+ Gives an external trigger-marking entity an opportunity to replace triggers
+ which may have been reclaimed. The callback can only be installed (not
+ cleared), and only one callback can be installed. The callback will be called
+ with a read-write lock held on the mount point; in the VTC_REPLACE case, the
+ <em>only</em> valid VFS operation to perform in the context of the callback is
+ vfs_addtrigger() on the mountpoint in question. This rwlock is held in order
+ to attempt to provide some modicum of coverage from lookups which might find
+ missing trigger vnodes and receive spurious ENOENTs. Note that this
+ protection is incomplete--current working directories, or traversals up into a
+ volume via ".." may still find missing triggers. As of this writing, no
+ serialization mechanism exists to do better than this.
+ When the "op" is VTC_RELEASE, the mountpoint is going away, and the only valid
+ VFS operation is to free the private data pointer if needed. The callback
+ will be called immediately, with VTC_REPLACE, from vfs_settriggercallback(),
+ if installation is successful.
+ @param fsid FSID for filesystem in question.
+ @param vtc Callback pointer.
+ @param data Context pointer to be passed to callback.
+ @param flags Currently unused.
+ @param ctx Authorization context.
+ @return 0 for success. EBUSY if a trigger has already been installed.
+ */
+int vfs_settriggercallback(fsid_t *fsid, vfs_trigger_callback_t vtc, void *data, uint32_t flags, vfs_context_t ctx);
+
+/* tags a volume as not supporting extended readdir for NFS exports */
+void mount_set_noreaddirext (mount_t);
+
+#endif /* KERNEL_PRIVATE */
__END_DECLS
#endif /* KERNEL */
/*
* Generic file handle
*/
-#define NFS_MAX_FH_SIZE 64
+#define NFS_MAX_FH_SIZE NFSV4_MAX_FH_SIZE
+#define NFSV4_MAX_FH_SIZE 128
+#define NFSV3_MAX_FH_SIZE 64
#define NFSV2_MAX_FH_SIZE 32
struct fhandle {
int fh_len; /* length of file handle */
__BEGIN_DECLS
int fhopen(const struct fhandle *, int);
-int fstatfs(int, struct statfs *);
+int fstatfs(int, struct statfs *) __DARWIN_INODE64(fstatfs);
+#if !__DARWIN_ONLY_64_BIT_INO_T
+int fstatfs64(int, struct statfs64 *) __OSX_AVAILABLE_BUT_DEPRECATED(__MAC_10_5,__MAC_10_6,__IPHONE_NA,__IPHONE_NA);
+#endif /* !__DARWIN_ONLY_64_BIT_INO_T */
int getfh(const char *, fhandle_t *);
-int getfsstat(struct statfs *, int, int);
-int getmntinfo(struct statfs **, int);
+int getfsstat(struct statfs *, int, int) __DARWIN_INODE64(getfsstat);
+#if !__DARWIN_ONLY_64_BIT_INO_T
+int getfsstat64(struct statfs64 *, int, int) __OSX_AVAILABLE_BUT_DEPRECATED(__MAC_10_5,__MAC_10_6,__IPHONE_NA,__IPHONE_NA);
+#endif /* !__DARWIN_ONLY_64_BIT_INO_T */
+int getmntinfo(struct statfs **, int) __DARWIN_INODE64(getmntinfo);
+#if !__DARWIN_ONLY_64_BIT_INO_T
+int getmntinfo64(struct statfs64 **, int) __OSX_AVAILABLE_BUT_DEPRECATED(__MAC_10_5,__MAC_10_6,__IPHONE_NA,__IPHONE_NA);
+#endif /* !__DARWIN_ONLY_64_BIT_INO_T */
int mount(const char *, const char *, int, void *);
-int statfs(const char *, struct statfs *);
+int statfs(const char *, struct statfs *) __DARWIN_INODE64(statfs);
+#if !__DARWIN_ONLY_64_BIT_INO_T
+int statfs64(const char *, struct statfs64 *) __OSX_AVAILABLE_BUT_DEPRECATED(__MAC_10_5,__MAC_10_6,__IPHONE_NA,__IPHONE_NA);
+#endif /* !__DARWIN_ONLY_64_BIT_INO_T */
int unmount(const char *, int);
int getvfsbyname(const char *, struct vfsconf *);
__END_DECLS
projects / apple / xnu.git / blobdiff