X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/0c530ab8987f0ae6a1a3d9284f40182b88852816..d190cdc3f5544636abb56dc1874be391d3e1b148:/bsd/sys/mount.h diff --git a/bsd/sys/mount.h b/bsd/sys/mount.h index e2078d904..242f50480 100644 --- a/bsd/sys/mount.h +++ b/bsd/sys/mount.h @@ -1,23 +1,29 @@ /* - * 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 */ /* @@ -54,6 +60,13 @@ * * @(#)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_ @@ -66,18 +79,57 @@ #include #include #include /* XXX needed for user builds */ +#include #else #include +#include #endif -typedef struct fsid { int32_t val[2]; } fsid_t; /* file system id type */ +#include /* 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. @@ -96,22 +148,16 @@ struct statfs { 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) @@ -136,6 +182,13 @@ struct vfsstatfs { #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) @@ -169,12 +222,18 @@ struct vfsstatfs { #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; @@ -209,10 +268,13 @@ struct vfs_attr { 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. * @@ -225,29 +287,42 @@ struct vfs_attr { #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)) @@ -255,11 +330,12 @@ struct vfs_attr { */ #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. @@ -267,9 +343,10 @@ struct vfs_attr { * 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) @@ -289,15 +366,15 @@ struct vfs_attr { #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 @@ -307,14 +384,15 @@ struct vnode; 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 { @@ -330,22 +408,6 @@ 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. */ @@ -354,6 +416,19 @@ struct user_vfsidctl { 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 */ /* @@ -366,12 +441,32 @@ struct user_vfsidctl { #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 */ @@ -382,10 +477,10 @@ struct vfsquery { #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 */ @@ -402,19 +497,38 @@ struct vfsioattr { 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 */ @@ -429,28 +543,235 @@ struct vfs_fsentry { 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 @@ -462,76 +783,547 @@ struct vfsops { __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 + only 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 */ @@ -541,7 +1333,9 @@ __END_DECLS /* * 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 */ @@ -552,12 +1346,24 @@ typedef struct fhandle fhandle_t; __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