/*
- * Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2010 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 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/mount.h>
#include <sys/cdefs.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
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 */
- int mnt_flag; /* flags */
- int mnt_kern_flag; /* kernel only flags */
- int mnt_lflag; /* mount life cycle flags */
- int mnt_maxsymlinklen; /* max size of short symlink */
+ uint32_t mnt_flag; /* flags */
+ uint32_t mnt_kern_flag; /* kernel only flags */
+ 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 */
- u_int32_t mnt_maxreadcnt; /* Max. byte count for read */
- u_int32_t mnt_maxwritecnt; /* Max. byte count for write */
- u_int32_t mnt_segreadcnt; /* Max. segment count for read */
- u_int32_t mnt_segwritecnt; /* Max. segment count for write */
- u_int32_t mnt_maxsegreadsize; /* Max. segment read size */
- u_int32_t mnt_maxsegwritesize; /* Max. segment write size */
- u_int32_t mnt_devblocksize; /* the underlying device block size */
+ 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 */
+ 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 */
+
lck_rw_t mnt_rwlock; /* mutex readwrite lock */
- lck_mtx_t mnt_renamelock; /* mutex that serializes renames that change shape of tree */
+ 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 *mnt_mntlabel; /* MAC mount label */
+ struct label *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;
+ /*
+ * The proc structure pointer and process ID form a
+ * sufficiently unique duple identifying the process
+ * hosting this mount point. Set by vfs_markdependency()
+ * and utilized in new_vnode() to avoid reclaiming vnodes
+ * with this dependency (radar 5192010).
+ */
+ pid_t mnt_dependent_pid;
+ void *mnt_dependent_process;
+ char fstypename_override[MFSTYPENAMELEN];
};
+
+/*
+ * 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
+
+/*
+ * ioqueue depth for devices that don't report one
+ */
+#define MNT_DEFAULT_IOQUEUE_DEPTH 32
+
/* XXX 3762912 hack to support HFS filesystem 'owner' */
#define vfs_setowner(_mp, _uid, _gid) do {(_mp)->mnt_fsowner = (_uid); (_mp)->mnt_fsgroup = (_gid); } while (0)
* because the bits here were broken out from the high bits
* of the mount flags.
*/
+#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 */
+#ifdef NFSCLIENT
+#define MNTK_TYPENAME_OVERRIDE 0x00000800 /* override the fstypename for statfs() */
+#endif /* NFSCLIENT */
+#define MNTK_KERNEL_MOUNT 0x00001000 /* mount came from kernel side */
+#ifdef CONFIG_IMGSRC_ACCESS
+#define MNTK_HAS_MOVED 0x00002000
+#define MNTK_BACKS_ROOT 0x00004000
+#endif /* CONFIG_IMGSRC_ACCESS */
+#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 */
+#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 */
#define MNTK_WANTRDWR 0x04000000 /* upgrade to read/write requested */
/*
* 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 */
* mount time to identify the requested filesystem.
*/
struct vfstable {
-/* THE FOLLOWING SHOULD KEEP THE SAME FOR user compat with sysctl */
struct vfsops *vfc_vfsops; /* filesystem operations vector */
char vfc_name[MFSNAMELEN]; /* filesystem type name */
int vfc_typenum; /* historic filesystem type number */
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 */
-/* Till the above we SHOULD KEEP THE SAME FOR user compat with sysctl */
- int vfc_threadsafe; /* FS is thread & premeption safe */
- lck_mtx_t vfc_lock; /* for non-threaded file systems */
+ 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 */
- int vfc_64bitready; /* The file system is ready for 64bit */
};
-#define VFC_VFSLOCALARGS 0x02
-#define VFC_VFSGENERICARGS 0x04
-#define VFC_VFSNATIVEXATTR 0x10
+/* vfc_vfsflags: */
+#define VFC_VFSLOCALARGS 0x002
+#define VFC_VFSGENERICARGS 0x004
+#define VFC_VFSNATIVEXATTR 0x010
+#define VFC_VFSDIRLINKS 0x020
+#define VFC_VFSPREFLIGHT 0x040
+#define VFC_VFSREADDIR_EXTENDED 0x080
+#define VFC_VFS64BITREADY 0x100
+#ifndef __LP64__
+#define VFC_VFSTHREADSAFE 0x200
+#endif /* __LP64__ */
+#define VFC_VFSNOMACLABEL 0x1000
+#define VFC_VFSVNOP_PAGEINV2 0x2000
+#define VFC_VFSVNOP_PAGEOUTV2 0x4000
extern int maxvfsconf; /* highest defined filesystem type */
/*
- * LP64 version of statfs structure.
+ * LP64 *user* version of statfs structure.
* NOTE - must be kept in sync with struct statfs in mount.h
*/
-#if __DARWIN_ALIGN_NATURAL
-#pragma options align=natural
-#endif
+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 */
+};
-struct user_statfs {
+/*
+ * 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 */
- user_long_t f_bsize; /* fundamental file system block size */
- user_long_t f_iosize; /* optimal transfer block size */
- user_long_t f_blocks; /* total data blocks in file system */
- user_long_t f_bfree; /* free blocks in fs */
- user_long_t f_bavail; /* free blocks avail to non-superuser */
- user_long_t f_files; /* total file nodes in file system */
- user_long_t f_ffree; /* free file nodes in fs */
+ 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 */
- user_long_t f_flags; /* copy of mount exported flags */
- user_long_t f_reserved2[2]; /* reserved for future use */
+ 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 */
-#if COMPAT_GETFSSTAT
- char f_reserved3[0]; /* For alignment */
- user_long_t f_reserved4[0]; /* For future use */
-#else
char f_reserved3; /* For alignment */
- user_long_t f_reserved4[4]; /* For future use */
-#endif
+ user32_long_t f_reserved4[4]; /* For future use */
};
-#if __DARWIN_ALIGN_NATURAL
-#pragma options align=reset
-#endif
+/*
+ * 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_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);
-errno_t vfs_init_io_attributes(vnode_t, mount_t);
int vfs_mountroot(void);
void vfs_unmountall(void);
-int safedounmount(struct mount *, int, struct proc *);
-int dounmount(struct mount *, int, int, struct proc *);
+int safedounmount(struct mount *, int, vfs_context_t);
+int dounmount(struct mount *, int, int, vfs_context_t);
-/* xnuy internal api */
+/* xnu internal api */
void mount_dropcrossref(mount_t, vnode_t, int);
-int validfsnode(mount_t);
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);
+/* tags a volume as not supporting extended readdir for NFS exports */
+#ifdef BSD_KERNEL_PRIVATE
+void mount_set_noreaddirext (mount_t);
+#endif
+
+/* 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 */
+#if NFSCLIENT
+/*
+ * 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 */
+int throttle_get_io_policy(struct uthread **ut);
+int throttle_io_will_be_throttled(int lowpri_window_msecs, mount_t mp);
+
+/* throttled I/O helper function */
+/* convert the lowest bit to a device index */
+extern int num_trailing_0(uint64_t n);
+
__END_DECLS
#endif /* !_SYS_MOUNT_INTERNAL_H_ */
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