/* * Copyright (c) 2000-2018 Apple Inc. All rights reserved. * * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in * compliance with the License. The rights granted to you under the License * may not be used to create, or enable the creation or redistribution of, * unlawful or unlicensed copies of an Apple operating system, or to * circumvent, violate, or enable the circumvention or violation of, any * terms of an Apple operating system software license agreement. * * Please obtain a copy of the License at * http://www.opensource.apple.com/apsl/ and read it before using this file. * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. * * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */ /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */ /* * Copyright (c) 1989, 1991, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)mount.h 8.21 (Berkeley) 5/20/95 */ /* * NOTICE: This file was modified by McAfee Research in 2004 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_INTERNAL_H_ #define _SYS_MOUNT_INTERNAL_H_ #include <sys/appleapiopts.h> #ifndef KERNEL #include <sys/ucred.h> #else #include <sys/kernel_types.h> #include <sys/namei.h> #endif #include <sys/queue.h> #include <sys/lock.h> #include <net/radix.h> #include <sys/socket.h> /* XXX for AF_MAX */ #include <sys/vfs_context.h> /* XXX for AF_MAX */ #include <sys/mount.h> #include <sys/cdefs.h> #include <sys/sysctl.h> struct label; #if defined(__i386__) || defined(__x86_64__) typedef uint64_t pending_io_t; #define INCR_PENDING_IO(a, b) OSAddAtomic64((int64_t)(a), (int64_t *)&(b)); #else typedef uint32_t pending_io_t; #define INCR_PENDING_IO(a, b) OSAddAtomic((int32_t)(a), (int32_t *)&(b)); #endif /* * Structure per mounted file system. Each mounted file system has an * array of operations and an instance record. The file systems are * put on a doubly linked list. */ TAILQ_HEAD(vnodelst, vnode); struct mount { TAILQ_ENTRY(mount) mnt_list; /* mount list */ int32_t mnt_count; /* reference on the mount */ lck_mtx_t mnt_mlock; /* mutex that protects mount point */ const struct vfsops * XNU_PTRAUTH_SIGNED_PTR("mount.vfsops") mnt_op; /* operations on fs */ struct vfstable * XNU_PTRAUTH_SIGNED_PTR("mount.mnt_vtable") mnt_vtable; /* configuration info */ struct vnode * XNU_PTRAUTH_SIGNED_PTR("mount.mnt_vnodecovered") mnt_vnodecovered; /* vnode we mounted on */ struct vnodelst mnt_vnodelist; /* list of vnodes this mount */ struct vnodelst mnt_workerqueue; /* list of vnodes this mount */ struct vnodelst mnt_newvnodes; /* list of vnodes this mount */ uint32_t mnt_flag; /* flags */ uint32_t mnt_kern_flag; /* kernel only flags. NOTE: See mnt_supl_kern_flags below! */ uint32_t mnt_compound_ops; /* Available compound operations */ uint32_t mnt_lflag; /* mount life cycle flags */ uint32_t mnt_maxsymlinklen; /* max size of short symlink */ struct vfsstatfs mnt_vfsstat; /* cache of filesystem stats */ qaddr_t mnt_data; /* private data */ /* Cached values of the IO constraints for the device */ uint32_t mnt_maxreadcnt; /* Max. byte count for read */ uint32_t mnt_maxwritecnt; /* Max. byte count for write */ uint32_t mnt_segreadcnt; /* Max. segment count for read */ uint32_t mnt_segwritecnt; /* Max. segment count for write */ uint32_t mnt_maxsegreadsize; /* Max. segment read size */ uint32_t mnt_maxsegwritesize; /* Max. segment write size */ uint32_t mnt_alignmentmask; /* Mask of bits that aren't addressable via DMA */ uint32_t mnt_devblocksize; /* the underlying device block size */ uint32_t mnt_ioqueue_depth; /* the maxiumum number of commands a device can accept */ uint32_t mnt_ioscale; /* scale the various throttles/limits imposed on the amount of I/O in flight */ uint32_t mnt_ioflags; /* flags for underlying device */ uint32_t mnt_minsaturationbytecount; /* if non-zero, mininum amount of writes (in bytes) needed to max out throughput */ pending_io_t mnt_pending_write_size __attribute__((aligned(sizeof(pending_io_t)))); /* byte count of pending writes */ pending_io_t mnt_pending_read_size __attribute__((aligned(sizeof(pending_io_t)))); /* byte count of pending reads */ struct timeval mnt_last_write_issued_timestamp; struct timeval mnt_last_write_completed_timestamp; int64_t mnt_max_swappin_available; lck_rw_t mnt_rwlock; /* mutex readwrite lock */ lck_mtx_t mnt_renamelock; /* mutex that serializes renames that change shape of tree */ vnode_t mnt_devvp; /* the device mounted on for local file systems */ uint32_t mnt_devbsdunit; /* the BSD unit number of the device */ uint64_t mnt_throttle_mask; /* the throttle mask of what devices will be affected by I/O from this mnt */ void *mnt_throttle_info; /* used by the throttle code */ int32_t mnt_crossref; /* refernces to cover lookups crossing into mp */ int32_t mnt_iterref; /* refernces to cover iterations; drained makes it -ve */ #if CONFIG_TRIGGERS int32_t mnt_numtriggers; /* num of trigger vnodes for this mount */ vfs_trigger_callback_t *mnt_triggercallback; void *mnt_triggerdata; #endif /* XXX 3762912 hack to support HFS filesystem 'owner' */ uid_t mnt_fsowner; gid_t mnt_fsgroup; struct label * XNU_PTRAUTH_SIGNED_PTR("mount.mnt_mntlabel") mnt_mntlabel; /* MAC mount label */ struct label * XNU_PTRAUTH_SIGNED_PTR("mount.mnt_fslabel") mnt_fslabel; /* MAC default fs label */ /* * cache the rootvp of the last mount point * in the chain in the mount struct pointed * to by the vnode sitting in '/' * this cache is used to shortcircuit the * mount chain traversal and allows us * to traverse to the true underlying rootvp * in 1 easy step inside of 'cache_lookup_path' * * make sure to validate against the cached vid * in case the rootvp gets stolen away since * we don't take an explicit long term reference * on it when we mount it */ vnode_t mnt_realrootvp; uint32_t mnt_realrootvp_vid; /* * bumped each time a mount or unmount * occurs... its used to invalidate * 'mnt_realrootvp' from the cache */ uint32_t mnt_generation; /* * if 'MNTK_AUTH_CACHE_TIMEOUT' is * set, then 'mnt_authcache_ttl' is * the time-to-live for the per-vnode authentication cache * on this mount... if zero, no cache is maintained... * if 'MNTK_AUTH_CACHE_TIMEOUT' isn't set, its the * time-to-live for the cached lookup right for * volumes marked 'MNTK_AUTH_OPAQUE'. */ int mnt_authcache_ttl; char fstypename_override[MFSTYPENAMELEN]; uint32_t mnt_iobufinuse; void *mnt_disk_conditioner_info; lck_mtx_t mnt_iter_lock; /* mutex that protects iteration of vnodes */ uint64_t mnt_mount_id; /* system-wide unique mount ID */ uint32_t mnt_supl_kern_flag; /* Supplemental kernel-only mount flags */ }; /* * default number of seconds to keep cached lookup * rights valid on mounts marked MNTK_AUTH_OPAQUE */ #define CACHED_LOOKUP_RIGHT_TTL 2 /* * ioflags */ #define MNT_IOFLAGS_FUA_SUPPORTED 0x00000001 #define MNT_IOFLAGS_UNMAP_SUPPORTED 0x00000002 #define MNT_IOFLAGS_IOSCHED_SUPPORTED 0x00000004 #define MNT_IOFLAGS_CSUNMAP_SUPPORTED 0x00000008 #define MNT_IOFLAGS_SWAPPIN_SUPPORTED 0x00000010 #define MNT_IOFLAGS_FUSION_DRIVE 0x00000020 #define MNT_IOFLAGS_PERIPHERAL_DRIVE 0x00000040 /* External: Attached directly to the system (USB,TBT,FW,etc.) */ /* * ioqueue depth for devices that don't report one */ #define MNT_DEFAULT_IOQUEUE_DEPTH 32 /* * mnt_ioscale value for the given ioqueue depth */ #define MNT_IOSCALE(ioqueue_depth) ((ioqueue_depth + (MNT_DEFAULT_IOQUEUE_DEPTH - 1)) / MNT_DEFAULT_IOQUEUE_DEPTH) /* mount point to which dead vps point to */ extern struct mount * dead_mountp; /* * Internal filesystem control flags stored in mnt_kern_flag. * * MNTK_UNMOUNT locks the mount entry so that name lookup cannot proceed * past the mount point. This keeps the subtree stable during mounts * and unmounts. * * Note: We are counting down on new bit assignments. This is * because the bits here were broken out from the high bits * of the mount flags. */ #define MNTK_SYSTEM 0x00000040 /* Volume associated with system volume (do not allow unmount) */ #define MNTK_NOSWAP 0x00000080 /* swap files cannot be used on this mount */ #define MNTK_SWAP_MOUNT 0x00000100 /* we are swapping to this mount */ #define MNTK_DENY_READDIREXT 0x00000200 /* Deny Extended-style readdir's for this volume */ #define MNTK_PERMIT_UNMOUNT 0x00000400 /* Allow (non-forced) unmounts by UIDs other than the one that mounted the volume */ #define MNTK_TYPENAME_OVERRIDE 0x00000800 /* override the fstypename for statfs() */ #define MNTK_KERNEL_MOUNT 0x00001000 /* mount came from kernel side */ #ifdef CONFIG_IMGSRC_ACCESS #define MNTK_HAS_MOVED 0x00002000 #endif /* CONFIG_IMGSRC_ACCESS */ #define MNTK_BACKS_ROOT 0x00004000 /* mount contains a disk image backing the root filesystem - therefore it mustn't be unmounted */ #define MNTK_AUTH_CACHE_TTL 0x00008000 /* rights cache has TTL - TTL of 0 disables cache */ #define MNTK_PATH_FROM_ID 0x00010000 /* mounted file system supports id-to-path lookups */ #define MNTK_UNMOUNT_PREFLIGHT 0x00020000 /* mounted file system wants preflight check during unmount */ #define MNTK_NAMED_STREAMS 0x00040000 /* mounted file system supports Named Streams VNOPs */ #define MNTK_EXTENDED_ATTRS 0x00080000 /* mounted file system supports Extended Attributes VNOPs */ #define MNTK_LOCK_LOCAL 0x00100000 /* advisory locking is done above the VFS itself */ #define MNTK_VIRTUALDEV 0x00200000 /* mounted on a virtual device i.e. a disk image */ #define MNTK_ROOTDEV 0x00400000 /* this filesystem resides on the same device as the root - appears unused as of 2020 */ #define MNTK_SSD 0x00800000 /* underlying device is of the solid state variety */ #define MNTK_UNMOUNT 0x01000000 /* unmount in progress */ #define MNTK_MWAIT 0x02000000 /* waiting for unmount to finish - appears unused as of 2020 */ #define MNTK_WANTRDWR 0x04000000 /* upgrade to read/write requested */ #define MNTK_SYSTEMDATA 0x08000000 /* volume is a Data volume tightly linked with System root volume. Firmlinks, etc */ #define MNTK_DIR_HARDLINKS 0x10000000 /* mounted file system supports directory hard links */ #define MNTK_AUTH_OPAQUE 0x20000000 /* authorisation decisions are not made locally */ #define MNTK_AUTH_OPAQUE_ACCESS 0x40000000 /* VNOP_ACCESS is reliable for remote auth */ #define MNTK_EXTENDED_SECURITY 0x80000000 /* extended security supported */ /* * Internal supplemental FS control flags stored in mnt_supl_kern_flag * * NOTE: The 32 bits in the above-mentioned 32bit flag word (mnt_kern_flag) have been * exhausted, so this is intended as a supplement. */ #define MNTK_SUPL_BASESYSTEM 0x00000001 /* * Mount Lifecycle Flags (stored in mnt_lflag) */ #define MNT_LNOTRESP 0x00000001 /* mount not responding */ #define MNT_LUNMOUNT 0x00000002 /* mount in unmount */ #define MNT_LFORCE 0x00000004 /* mount in forced unmount */ #define MNT_LDRAIN 0x00000008 /* mount in drain */ #define MNT_LITER 0x00000010 /* mount in iteration */ #define MNT_LNEWVN 0x00000020 /* mount has new vnodes created */ #define MNT_LWAIT 0x00000040 /* wait for unmount op */ #define MNT_LMOUNT 0x00000080 /* not finished mounting */ #define MNT_LDEAD 0x00000100 /* mount already unmounted*/ #define MNT_LNOSUB 0x00000200 /* submount - no recursion */ /* * Generic file handle */ #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 #ifdef MALLOC_DECLARE MALLOC_DECLARE(M_FHANDLE); #endif struct fhandle { unsigned int fh_len; /* length of file handle */ unsigned char fh_data[NFS_MAX_FH_SIZE]; /* file handle value */ }; typedef struct fhandle fhandle_t; /* * Filesystem configuration information. One of these exists for each * type of filesystem supported by the kernel. These are searched at * mount time to identify the requested filesystem. */ struct vfstable { const struct vfsops *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 */ int (*vfc_mountroot)(mount_t, vnode_t, vfs_context_t); /* if != NULL, routine to mount root */ struct vfstable *vfc_next; /* next in list */ int32_t vfc_reserved1; int32_t vfc_reserved2; int vfc_vfsflags; /* for optional types */ void * vfc_descptr; /* desc table allocated address */ int vfc_descsize; /* size allocated for desc table */ struct sysctl_oid *vfc_sysctl; /* dynamically registered sysctl node */ }; /* vfc_vfsflags: */ #define VFC_VFSLOCALARGS 0x002 #define VFC_VFSGENERICARGS 0x004 #define VFC_VFSNATIVEXATTR 0x010 #define VFC_VFSCANMOUNTROOT 0x020 #define VFC_VFSPREFLIGHT 0x040 #define VFC_VFSREADDIR_EXTENDED 0x080 #define VFC_VFS64BITREADY 0x100 #define VFC_VFSNOMACLABEL 0x1000 #define VFC_VFSVNOP_PAGEINV2 0x2000 #define VFC_VFSVNOP_PAGEOUTV2 0x4000 #define VFC_VFSVNOP_NOUPDATEID_RENAME 0x8000 #define VFC_VFSVNOP_SECLUDE_RENAME 0x10000 extern int maxvfstypenum; /* highest defined filesystem type */ extern struct vfstable *vfsconf; /* head of list of filesystem types */ extern const int maxvfsslots; /* Maximum statically allocated slots available to be used */ extern int numused_vfsslots; /* number of statically allocated slots already used */ extern int numregistered_fses; /* number of total registered filesystems */ /* the following two are xnu private */ struct vfstable * vfstable_add(struct vfstable *); int vfstable_del(struct vfstable *); struct vfsmount_args { union { struct { char * mnt_fspec; void * mnt_fsdata; } mnt_localfs_args; struct { void * mnt_fsdata; /* FS specific */ } mnt_remotefs_args; } mountfs_args; }; /* * LP64 *user* version of statfs structure. * NOTE - must be kept in sync with struct statfs in mount.h */ struct user64_statfs { short f_otype; /* TEMPORARY SHADOW COPY OF f_type */ short f_oflags; /* TEMPORARY SHADOW COPY OF f_flags */ user64_long_t f_bsize; /* fundamental file system block size */ user64_long_t f_iosize; /* optimal transfer block size */ user64_long_t f_blocks; /* total data blocks in file system */ user64_long_t f_bfree; /* free blocks in fs */ user64_long_t f_bavail; /* free blocks avail to non-superuser */ user64_long_t f_files; /* total file nodes in file system */ user64_long_t f_ffree; /* free file nodes in fs */ fsid_t f_fsid; /* file system id */ uid_t f_owner; /* user that mounted the filesystem */ short f_reserved1; /* spare for later */ short f_type; /* type of filesystem */ user64_long_t f_flags; /* copy of mount exported flags */ user64_long_t 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 */ char f_reserved3; /* For alignment */ user64_long_t f_reserved4[4]; /* For future use */ }; /* * ILP32 *user* version of statfs structure. * NOTE - must be kept in sync with struct statfs in mount.h */ struct user32_statfs { short f_otype; /* TEMPORARY SHADOW COPY OF f_type */ short f_oflags; /* TEMPORARY SHADOW COPY OF f_flags */ user32_long_t f_bsize; /* fundamental file system block size */ user32_long_t f_iosize; /* optimal transfer block size */ user32_long_t f_blocks; /* total data blocks in file system */ user32_long_t f_bfree; /* free blocks in fs */ user32_long_t f_bavail; /* free blocks avail to non-superuser */ user32_long_t f_files; /* total file nodes in file system */ user32_long_t f_ffree; /* free file nodes in fs */ fsid_t f_fsid; /* file system id */ uid_t f_owner; /* user that mounted the filesystem */ short f_reserved1; /* spare for later */ short f_type; /* type of filesystem */ user32_long_t f_flags; /* copy of mount exported flags */ user32_long_t 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 */ char f_reserved3; /* For alignment */ user32_long_t f_reserved4[4]; /* For future use */ }; /* * throttle I/Os are affected only by normal I/Os happening on the same spindle. Currently we use a 64-bit integer to * represent what devices are affected, so we can handle at most 64 different spindles. Since * throttled I/O is usually useful in non-server environment only, this number is enough in most cases. */ #define LOWPRI_MAX_NUM_DEV 64 __BEGIN_DECLS extern uint32_t mount_generation; extern TAILQ_HEAD(mntlist, mount) mountlist; void mount_list_lock(void); void mount_list_unlock(void); void mount_lock_init(mount_t); void mount_lock_destroy(mount_t); void mount_lock(mount_t); void mount_lock_spin(mount_t); void mount_unlock(mount_t); void mount_iterate_lock(mount_t); void mount_iterate_unlock(mount_t); void mount_lock_renames(mount_t); void mount_unlock_renames(mount_t); void mount_ref(mount_t, int); void mount_drop(mount_t, int); int mount_refdrain(mount_t); /* vfs_rootmountalloc should be kept as a private api */ errno_t vfs_rootmountalloc(const char *, const char *, mount_t *mpp); int vfs_mount_recovery(void); typedef uint32_t vfs_switch_root_flags_t; #define VFSSR_VIRTUALDEV_PROHIBITED 0x01 /* Not allowed to pivot into virtual devices (disk images). * This is really just because we don't have a great way to find * the filesystem that backs the image in order to set * MNTK_BACKS_ROOT on it, which would prevent even forced-unmounts. * Also, lots of disk images are backed by userspace processes, * which also seems like a bad idea for the root filesystem. */ int vfs_switch_root(const char *, const char *, vfs_switch_root_flags_t); int vfs_mountroot(void); void vfs_unmountall(int only_non_system); int safedounmount(struct mount *, int, vfs_context_t); int dounmount(struct mount *, int, int, vfs_context_t); void dounmount_submounts(struct mount *, int, vfs_context_t); /* xnu internal api */ void mount_dropcrossref(mount_t, vnode_t, int); mount_t mount_lookupby_volfsid(int, int); mount_t mount_list_lookupby_fsid(fsid_t *, int, int); int mount_list_add(mount_t); void mount_list_remove(mount_t); int mount_iterref(mount_t, int); int mount_isdrained(mount_t, int); void mount_iterdrop(mount_t); void mount_iterdrain(mount_t); void mount_iterreset(mount_t); /* These flags are used as flag bits in the `internal_flags` argument to mount_common */ /* Private NFS spi */ #define KERNEL_MOUNT_NOAUTH 0x01 /* Don't check the UID of the directory we are mounting on */ #define KERNEL_MOUNT_PERMIT_UNMOUNT 0x02 /* Allow (non-forced) unmounts by users other the one who mounted the volume */ /* used by snapshot mounting SPI */ #define KERNEL_MOUNT_SNAPSHOT 0x04 /* Mounting a snapshot */ #define KERNEL_MOUNT_DATAVOL 0x08 /* mount the data volume */ #define KERNEL_MOUNT_VMVOL 0x10 /* mount the VM volume */ #define KERNEL_MOUNT_PREBOOTVOL 0x20 /* mount the Preboot volume */ #define KERNEL_MOUNT_RECOVERYVOL 0x40 /* mount the Recovery volume */ #define KERNEL_MOUNT_BASESYSTEMROOT 0x80 /* mount a base root volume "instead of" the full root volume (only used during bsd_init) */ #define KERNEL_MOUNT_DEVFS 0x100 /* kernel startup mount of devfs */ /* mask for checking if any of the "mount volume by role" flags are set */ #define KERNEL_MOUNT_VOLBYROLE_MASK (KERNEL_MOUNT_DATAVOL | KERNEL_MOUNT_VMVOL | KERNEL_MOUNT_PREBOOTVOL | KERNEL_MOUNT_RECOVERYVOL) #if NFSCLIENT || DEVFS || ROUTEFS /* * NOTE: kernel_mount() does not force MNT_NOSUID, MNT_NOEXEC, or MNT_NODEC for non-privileged * mounting credentials, as the mount(2) system call does. */ int kernel_mount(char *, vnode_t, vnode_t, const char *, void *, size_t, int, uint32_t, vfs_context_t); boolean_t vfs_iskernelmount(mount_t); #endif /* Throttled I/O API. KPI/SPI is in systm.h. */ int throttle_get_io_policy(struct uthread **ut); int throttle_get_passive_io_policy(struct uthread **ut); void *throttle_info_update_by_mount(mount_t mp); void rethrottle_thread(uthread_t ut); /* throttled I/O helper function */ /* convert the lowest bit to a device index */ extern int num_trailing_0(uint64_t n); /* sync lock */ extern int sync_timeout_seconds; extern zone_t mount_zone; __END_DECLS #endif /* !_SYS_MOUNT_INTERNAL_H_ */