socsvn commit: r237547 - soc2012/gpf/pefs_head/head/sys/sys
gpf at FreeBSD.org
gpf at FreeBSD.org
Tue Jun 12 13:46:57 UTC 2012
Author: gpf
Date: Tue Jun 12 13:46:54 2012
New Revision: 237547
URL: http://svnweb.FreeBSD.org/socsvn/?view=rev&rev=237547
Log:
mount.h again
Replaced:
soc2012/gpf/pefs_head/head/sys/sys/mount.h
Added: soc2012/gpf/pefs_head/head/sys/sys/mount.h
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ soc2012/gpf/pefs_head/head/sys/sys/mount.h Tue Jun 12 13:46:54 2012 (r237547)
@@ -0,0 +1,854 @@
+/*-
+ * 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.
+ * 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
+ * $FreeBSD: soc2012/gpf/pefs_head/head/sys/sys/mount.h 234765 2012-04-20 06:50:44Z mckusick $
+ */
+
+#ifndef _SYS_MOUNT_H_
+#define _SYS_MOUNT_H_
+
+#include <sys/ucred.h>
+#include <sys/queue.h>
+#ifdef _KERNEL
+#include <sys/lock.h>
+#include <sys/lockmgr.h>
+#include <sys/_mutex.h>
+#endif
+
+/*
+ * NOTE: When changing statfs structure, mount structure, MNT_* flags or
+ * MNTK_* flags also update DDB show mount command in vfs_subr.c.
+ */
+
+typedef struct fsid { int32_t val[2]; } fsid_t; /* filesystem id type */
+
+/*
+ * File identifier.
+ * These are unique per filesystem on a single machine.
+ */
+#define MAXFIDSZ 16
+
+struct fid {
+ u_short fid_len; /* length of data in bytes */
+ u_short fid_data0; /* force longword alignment */
+ char fid_data[MAXFIDSZ]; /* data (variable length) */
+};
+
+/*
+ * filesystem statistics
+ */
+#define MFSNAMELEN 16 /* length of type name including null */
+#define MNAMELEN 88 /* size of on/from name bufs */
+#define STATFS_VERSION 0x20030518 /* current version number */
+struct statfs {
+ uint32_t f_version; /* structure version number */
+ uint32_t f_type; /* type of filesystem */
+ uint64_t f_flags; /* copy of mount exported flags */
+ uint64_t f_bsize; /* filesystem fragment size */
+ uint64_t f_iosize; /* optimal transfer block size */
+ uint64_t f_blocks; /* total data blocks in filesystem */
+ uint64_t f_bfree; /* free blocks in filesystem */
+ int64_t f_bavail; /* free blocks avail to non-superuser */
+ uint64_t f_files; /* total file nodes in filesystem */
+ int64_t f_ffree; /* free nodes avail to non-superuser */
+ uint64_t f_syncwrites; /* count of sync writes since mount */
+ uint64_t f_asyncwrites; /* count of async writes since mount */
+ uint64_t f_syncreads; /* count of sync reads since mount */
+ uint64_t f_asyncreads; /* count of async reads since mount */
+ uint64_t f_spare[10]; /* unused spare */
+ uint32_t f_namemax; /* maximum filename length */
+ uid_t f_owner; /* user that mounted the filesystem */
+ fsid_t f_fsid; /* filesystem id */
+ char f_charspare[80]; /* spare string space */
+ char f_fstypename[MFSNAMELEN]; /* filesystem type name */
+ char f_mntfromname[MNAMELEN]; /* mounted filesystem */
+ char f_mntonname[MNAMELEN]; /* directory on which mounted */
+};
+
+#ifdef _KERNEL
+#define OMFSNAMELEN 16 /* length of fs type name, including null */
+#define OMNAMELEN (88 - 2 * sizeof(long)) /* size of on/from name bufs */
+
+/* XXX getfsstat.2 is out of date with write and read counter changes here. */
+/* XXX statfs.2 is out of date with read counter changes here. */
+struct ostatfs {
+ long f_spare2; /* placeholder */
+ long f_bsize; /* fundamental filesystem block size */
+ long f_iosize; /* optimal transfer block size */
+ long f_blocks; /* total data blocks in filesystem */
+ long f_bfree; /* free blocks in fs */
+ long f_bavail; /* free blocks avail to non-superuser */
+ long f_files; /* total file nodes in filesystem */
+ long f_ffree; /* free file nodes in fs */
+ fsid_t f_fsid; /* filesystem id */
+ uid_t f_owner; /* user that mounted the filesystem */
+ int f_type; /* type of filesystem */
+ int f_flags; /* copy of mount exported flags */
+ long f_syncwrites; /* count of sync writes since mount */
+ long f_asyncwrites; /* count of async writes since mount */
+ char f_fstypename[OMFSNAMELEN]; /* fs type name */
+ char f_mntonname[OMNAMELEN]; /* directory on which mounted */
+ long f_syncreads; /* count of sync reads since mount */
+ long f_asyncreads; /* count of async reads since mount */
+ short f_spares1; /* unused spare */
+ char f_mntfromname[OMNAMELEN];/* mounted filesystem */
+ short f_spares2; /* unused spare */
+ /*
+ * XXX on machines where longs are aligned to 8-byte boundaries, there
+ * is an unnamed int32_t here. This spare was after the apparent end
+ * of the struct until we bit off the read counters from f_mntonname.
+ */
+ long f_spare[2]; /* unused spare */
+};
+
+TAILQ_HEAD(vnodelst, vnode);
+
+/* Mount options list */
+TAILQ_HEAD(vfsoptlist, vfsopt);
+struct vfsopt {
+ TAILQ_ENTRY(vfsopt) link;
+ char *name;
+ void *value;
+ int len;
+ int pos;
+ int seen;
+};
+
+/*
+ * Structure per mounted filesystem. Each mounted filesystem has an
+ * array of operations and an instance record. The filesystems are
+ * put on a doubly linked list.
+ *
+ * Lock reference:
+ * m - mountlist_mtx
+ * i - interlock
+ *
+ * Unmarked fields are considered stable as long as a ref is held.
+ *
+ */
+struct mount {
+ struct mtx mnt_mtx; /* mount structure interlock */
+ int mnt_gen; /* struct mount generation */
+#define mnt_startzero mnt_list
+ TAILQ_ENTRY(mount) mnt_list; /* (m) mount list */
+ struct vfsops *mnt_op; /* operations on fs */
+ struct vfsconf *mnt_vfc; /* configuration info */
+ struct vnode *mnt_vnodecovered; /* vnode we mounted on */
+ struct vnode *mnt_syncer; /* syncer vnode */
+ int mnt_ref; /* (i) Reference count */
+ struct vnodelst mnt_nvnodelist; /* (i) list of vnodes */
+ int mnt_nvnodelistsize; /* (i) # of vnodes */
+ struct vnodelst mnt_activevnodelist; /* (i) list of active vnodes */
+ int mnt_activevnodelistsize;/* (i) # of active vnodes */
+ int mnt_writeopcount; /* (i) write syscalls pending */
+ int mnt_kern_flag; /* (i) kernel only flags */
+ uint64_t mnt_flag; /* (i) flags shared with user */
+ struct vfsoptlist *mnt_opt; /* current mount options */
+ struct vfsoptlist *mnt_optnew; /* new options passed to fs */
+ int mnt_maxsymlinklen; /* max size of short symlink */
+ struct statfs mnt_stat; /* cache of filesystem stats */
+ struct ucred *mnt_cred; /* credentials of mounter */
+ void * mnt_data; /* private data */
+ time_t mnt_time; /* last time written*/
+ int mnt_iosize_max; /* max size for clusters, etc */
+ struct netexport *mnt_export; /* export list */
+ struct label *mnt_label; /* MAC label for the fs */
+ u_int mnt_hashseed; /* Random seed for vfs_hash */
+ int mnt_lockref; /* (i) Lock reference count */
+ int mnt_secondary_writes; /* (i) # of secondary writes */
+ int mnt_secondary_accwrites;/* (i) secondary wr. starts */
+ struct thread *mnt_susp_owner; /* (i) thread owning suspension */
+#define mnt_endzero mnt_gjprovider
+ char *mnt_gjprovider; /* gjournal provider name */
+ struct lock mnt_explock; /* vfs_export walkers lock */
+};
+
+/*
+ * Definitions for MNT_VNODE_FOREACH_ALL.
+ */
+struct vnode *__mnt_vnode_next_all(struct vnode **mvp, struct mount *mp);
+struct vnode *__mnt_vnode_first_all(struct vnode **mvp, struct mount *mp);
+void __mnt_vnode_markerfree_all(struct vnode **mvp, struct mount *mp);
+
+#define MNT_VNODE_FOREACH_ALL(vp, mp, mvp) \
+ for (vp = __mnt_vnode_first_all(&(mvp), (mp)); \
+ (vp) != NULL; vp = __mnt_vnode_next_all(&(mvp), (mp)))
+
+#define MNT_VNODE_FOREACH_ALL_ABORT(mp, mvp) \
+ do { \
+ MNT_ILOCK(mp); \
+ __mnt_vnode_markerfree_all(&(mvp), (mp)); \
+ /* MNT_IUNLOCK(mp); -- done in above function */ \
+ mtx_assert(MNT_MTX(mp), MA_NOTOWNED); \
+ } while (0)
+
+/*
+ * Definitions for MNT_VNODE_FOREACH_ACTIVE.
+ */
+struct vnode *__mnt_vnode_next_active(struct vnode **mvp, struct mount *mp);
+struct vnode *__mnt_vnode_first_active(struct vnode **mvp, struct mount *mp);
+void __mnt_vnode_markerfree_active(struct vnode **mvp, struct mount *);
+
+#define MNT_VNODE_FOREACH_ACTIVE(vp, mp, mvp) \
+ for (vp = __mnt_vnode_first_active(&(mvp), (mp)); \
+ (vp) != NULL; vp = __mnt_vnode_next_active(&(mvp), (mp)))
+
+#define MNT_VNODE_FOREACH_ACTIVE_ABORT(mp, mvp) \
+ do { \
+ MNT_ILOCK(mp); \
+ __mnt_vnode_markerfree_active(&(mvp), (mp)); \
+ /* MNT_IUNLOCK(mp); -- done in above function */ \
+ mtx_assert(MNT_MTX(mp), MA_NOTOWNED); \
+ } while (0)
+
+/*
+ * Definitions for MNT_VNODE_FOREACH.
+ *
+ * This interface has been deprecated in favor of MNT_VNODE_FOREACH_ALL.
+ */
+struct vnode *__mnt_vnode_next(struct vnode **mvp, struct mount *mp);
+struct vnode *__mnt_vnode_first(struct vnode **mvp, struct mount *mp);
+void __mnt_vnode_markerfree(struct vnode **mvp, struct mount *mp);
+
+#define MNT_VNODE_FOREACH(vp, mp, mvp) \
+ for (vp = __mnt_vnode_first(&(mvp), (mp)); \
+ (vp) != NULL; vp = __mnt_vnode_next(&(mvp), (mp)))
+
+#define MNT_VNODE_FOREACH_ABORT_ILOCKED(mp, mvp) \
+ __mnt_vnode_markerfree(&(mvp), (mp))
+
+#define MNT_VNODE_FOREACH_ABORT(mp, mvp) \
+ do { \
+ MNT_ILOCK(mp); \
+ MNT_VNODE_FOREACH_ABORT_ILOCKED(mp, mvp); \
+ MNT_IUNLOCK(mp); \
+ } while (0)
+
+#define MNT_ILOCK(mp) mtx_lock(&(mp)->mnt_mtx)
+#define MNT_ITRYLOCK(mp) mtx_trylock(&(mp)->mnt_mtx)
+#define MNT_IUNLOCK(mp) mtx_unlock(&(mp)->mnt_mtx)
+#define MNT_MTX(mp) (&(mp)->mnt_mtx)
+#define MNT_REF(mp) (mp)->mnt_ref++
+#define MNT_REL(mp) do { \
+ KASSERT((mp)->mnt_ref > 0, ("negative mnt_ref")); \
+ (mp)->mnt_ref--; \
+ if ((mp)->mnt_ref == 0) \
+ wakeup((mp)); \
+} while (0)
+
+#endif /* _KERNEL */
+
+/*
+ * User specifiable flags, stored in mnt_flag.
+ */
+#define MNT_RDONLY 0x0000000000000001ULL /* read only filesystem */
+#define MNT_SYNCHRONOUS 0x0000000000000002ULL /* fs written synchronously */
+#define MNT_NOEXEC 0x0000000000000004ULL /* can't exec from filesystem */
+#define MNT_NOSUID 0x0000000000000008ULL /* don't honor setuid fs bits */
+#define MNT_NFS4ACLS 0x0000000000000010ULL /* enable NFS version 4 ACLs */
+#define MNT_UNION 0x0000000000000020ULL /* union with underlying fs */
+#define MNT_ASYNC 0x0000000000000040ULL /* fs written asynchronously */
+#define MNT_SUIDDIR 0x0000000000100000ULL /* special SUID dir handling */
+#define MNT_SOFTDEP 0x0000000000200000ULL /* using soft updates */
+#define MNT_NOSYMFOLLOW 0x0000000000400000ULL /* do not follow symlinks */
+#define MNT_GJOURNAL 0x0000000002000000ULL /* GEOM journal support enabled */
+#define MNT_MULTILABEL 0x0000000004000000ULL /* MAC support for objects */
+#define MNT_ACLS 0x0000000008000000ULL /* ACL support enabled */
+#define MNT_NOATIME 0x0000000010000000ULL /* dont update file access time */
+#define MNT_NOCLUSTERR 0x0000000040000000ULL /* disable cluster read */
+#define MNT_NOCLUSTERW 0x0000000080000000ULL /* disable cluster write */
+#define MNT_SUJ 0x0000000100000000ULL /* using journaled soft updates */
+
+/*
+ * NFS export related mount flags.
+ */
+#define MNT_EXRDONLY 0x0000000000000080ULL /* exported read only */
+#define MNT_EXPORTED 0x0000000000000100ULL /* filesystem is exported */
+#define MNT_DEFEXPORTED 0x0000000000000200ULL /* exported to the world */
+#define MNT_EXPORTANON 0x0000000000000400ULL /* anon uid mapping for all */
+#define MNT_EXKERB 0x0000000000000800ULL /* exported with Kerberos */
+#define MNT_EXPUBLIC 0x0000000020000000ULL /* public export (WebNFS) */
+
+/*
+ * Flags set by internal operations,
+ * but visible to the user.
+ * XXX some of these are not quite right.. (I've never seen the root flag set)
+ */
+#define MNT_LOCAL 0x0000000000001000ULL /* filesystem is stored locally */
+#define MNT_QUOTA 0x0000000000002000ULL /* quotas are enabled on fs */
+#define MNT_ROOTFS 0x0000000000004000ULL /* identifies the root fs */
+#define MNT_USER 0x0000000000008000ULL /* mounted by a user */
+#define MNT_IGNORE 0x0000000000800000ULL /* do not show entry in df */
+
+/*
+ * Mask of flags that are visible to statfs().
+ * XXX I think that this could now become (~(MNT_CMDFLAGS))
+ * but the 'mount' program may need changing to handle this.
+ */
+#define MNT_VISFLAGMASK (MNT_RDONLY | MNT_SYNCHRONOUS | MNT_NOEXEC | \
+ MNT_NOSUID | MNT_UNION | MNT_SUJ | \
+ MNT_ASYNC | MNT_EXRDONLY | MNT_EXPORTED | \
+ MNT_DEFEXPORTED | MNT_EXPORTANON| MNT_EXKERB | \
+ MNT_LOCAL | MNT_USER | MNT_QUOTA | \
+ MNT_ROOTFS | MNT_NOATIME | MNT_NOCLUSTERR| \
+ MNT_NOCLUSTERW | MNT_SUIDDIR | MNT_SOFTDEP | \
+ MNT_IGNORE | MNT_EXPUBLIC | MNT_NOSYMFOLLOW | \
+ MNT_GJOURNAL | MNT_MULTILABEL | MNT_ACLS | \
+ MNT_NFS4ACLS)
+
+/* Mask of flags that can be updated. */
+#define MNT_UPDATEMASK (MNT_NOSUID | MNT_NOEXEC | \
+ MNT_SYNCHRONOUS | MNT_UNION | MNT_ASYNC | \
+ MNT_NOATIME | \
+ MNT_NOSYMFOLLOW | MNT_IGNORE | \
+ MNT_NOCLUSTERR | MNT_NOCLUSTERW | MNT_SUIDDIR | \
+ MNT_ACLS | MNT_USER | MNT_NFS4ACLS)
+
+/*
+ * External filesystem command modifier flags.
+ * Unmount can use the MNT_FORCE flag.
+ * XXX: These are not STATES and really should be somewhere else.
+ * XXX: MNT_BYFSID collides with MNT_ACLS, but because MNT_ACLS is only used for
+ * mount(2) and MNT_BYFSID is only used for unmount(2) it's harmless.
+ */
+#define MNT_UPDATE 0x0000000000010000ULL /* not real mount, just update */
+#define MNT_DELEXPORT 0x0000000000020000ULL /* delete export host lists */
+#define MNT_RELOAD 0x0000000000040000ULL /* reload filesystem data */
+#define MNT_FORCE 0x0000000000080000ULL /* force unmount or readonly */
+#define MNT_SNAPSHOT 0x0000000001000000ULL /* snapshot the filesystem */
+#define MNT_BYFSID 0x0000000008000000ULL /* specify filesystem by ID. */
+#define MNT_CMDFLAGS (MNT_UPDATE | MNT_DELEXPORT | MNT_RELOAD | \
+ MNT_FORCE | MNT_SNAPSHOT | MNT_BYFSID)
+/*
+ * 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.
+ *
+ * MNTK_UNMOUNTF permits filesystems to detect a forced unmount while
+ * dounmount() is still waiting to lock the mountpoint. This allows
+ * the filesystem to cancel operations that might otherwise deadlock
+ * with the unmount attempt (used by NFS).
+ *
+ * MNTK_NOINSMNTQ is strict subset of MNTK_UNMOUNT. They are separated
+ * to allow for failed unmount attempt to restore the syncer vnode for
+ * the mount.
+ */
+#define MNTK_UNMOUNTF 0x00000001 /* forced unmount in progress */
+#define MNTK_ASYNC 0x00000002 /* filtered async flag */
+#define MNTK_SOFTDEP 0x00000004 /* async disabled by softdep */
+#define MNTK_NOINSMNTQ 0x00000008 /* insmntque is not allowed */
+#define MNTK_DRAINING 0x00000010 /* lock draining is happening */
+#define MNTK_REFEXPIRE 0x00000020 /* refcount expiring is happening */
+#define MNTK_EXTENDED_SHARED 0x00000040 /* Allow shared locking for more ops */
+#define MNTK_SHARED_WRITES 0x00000080 /* Allow shared locking for writes */
+#define MNTK_NOASYNC 0x00800000 /* disable async */
+#define MNTK_UNMOUNT 0x01000000 /* unmount in progress */
+#define MNTK_MWAIT 0x02000000 /* waiting for unmount to finish */
+#define MNTK_SUSPEND 0x08000000 /* request write suspension */
+#define MNTK_SUSPEND2 0x04000000 /* block secondary writes */
+#define MNTK_SUSPENDED 0x10000000 /* write operations are suspended */
+#define MNTK_MPSAFE 0x20000000 /* Filesystem is MPSAFE. */
+#define MNTK_LOOKUP_SHARED 0x40000000 /* FS supports shared lock lookups */
+#define MNTK_NOKNOTE 0x80000000 /* Don't send KNOTEs from VOP hooks */
+
+#define MNT_SHARED_WRITES(mp) (((mp) != NULL) && \
+ ((mp)->mnt_kern_flag & MNTK_SHARED_WRITES))
+
+/*
+ * Sysctl CTL_VFS definitions.
+ *
+ * Second level identifier specifies which filesystem. Second level
+ * identifier VFS_VFSCONF returns information about all filesystems.
+ * Second level identifier VFS_GENERIC is non-terminal.
+ */
+#define VFS_VFSCONF 0 /* get configured filesystems */
+#define VFS_GENERIC 0 /* generic filesystem information */
+/*
+ * Third level identifiers for VFS_GENERIC are given below; third
+ * level identifiers for specific filesystems are given in their
+ * mount specific header files.
+ */
+#define VFS_MAXTYPENUM 1 /* int: highest defined filesystem type */
+#define VFS_CONF 2 /* struct: vfsconf for filesystem given
+ as next argument */
+
+/*
+ * 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_NOWAIT 2 /* start all I/O, but do not wait for it */
+#define MNT_LAZY 3 /* push data not written by filesystem syncer */
+#define MNT_SUSPEND 4 /* Suspend file system after sync */
+
+/*
+ * Generic file handle
+ */
+struct fhandle {
+ fsid_t fh_fsid; /* Filesystem id of mount point */
+ struct fid fh_fid; /* Filesys specific id */
+};
+typedef struct fhandle fhandle_t;
+
+/*
+ * Old export arguments without security flavor list
+ */
+struct oexport_args {
+ int ex_flags; /* export related flags */
+ uid_t ex_root; /* mapping for root uid */
+ struct xucred ex_anon; /* mapping for anonymous user */
+ struct sockaddr *ex_addr; /* net address to which exported */
+ u_char ex_addrlen; /* and the net address length */
+ struct sockaddr *ex_mask; /* mask of valid bits in saddr */
+ u_char ex_masklen; /* and the smask length */
+ char *ex_indexfile; /* index file for WebNFS URLs */
+};
+
+/*
+ * Export arguments for local filesystem mount calls.
+ */
+#define MAXSECFLAVORS 5
+struct export_args {
+ int ex_flags; /* export related flags */
+ uid_t ex_root; /* mapping for root uid */
+ struct xucred ex_anon; /* mapping for anonymous user */
+ struct sockaddr *ex_addr; /* net address to which exported */
+ u_char ex_addrlen; /* and the net address length */
+ struct sockaddr *ex_mask; /* mask of valid bits in saddr */
+ u_char ex_masklen; /* and the smask length */
+ char *ex_indexfile; /* index file for WebNFS URLs */
+ int ex_numsecflavors; /* security flavor count */
+ int ex_secflavors[MAXSECFLAVORS]; /* list of security flavors */
+};
+
+/*
+ * Structure holding information for a publicly exported filesystem
+ * (WebNFS). Currently the specs allow just for one such filesystem.
+ */
+struct nfs_public {
+ int np_valid; /* Do we hold valid information */
+ fhandle_t np_handle; /* Filehandle for pub fs (internal) */
+ struct mount *np_mount; /* Mountpoint of exported fs */
+ char *np_index; /* Index file */
+};
+
+/*
+ * 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.
+ *
+ * XXX: Never change the first two arguments!
+ */
+struct vfsconf {
+ u_int vfc_version; /* ABI version number */
+ char vfc_name[MFSNAMELEN]; /* filesystem type name */
+ struct vfsops *vfc_vfsops; /* filesystem operations vector */
+ int vfc_typenum; /* historic filesystem type number */
+ int vfc_refcount; /* number mounted of this type */
+ int vfc_flags; /* permanent flags */
+ struct vfsoptdecl *vfc_opts; /* mount options */
+ TAILQ_ENTRY(vfsconf) vfc_list; /* list of vfscons */
+};
+
+/* Userland version of the struct vfsconf. */
+struct xvfsconf {
+ 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 */
+ struct vfsconf *vfc_next; /* next in list */
+};
+
+#ifndef BURN_BRIDGES
+struct ovfsconf {
+ void *vfc_vfsops;
+ char vfc_name[32];
+ int vfc_index;
+ int vfc_refcount;
+ int vfc_flags;
+};
+#endif
+
+/*
+ * NB: these flags refer to IMPLEMENTATION properties, not properties of
+ * any actual mounts; i.e., it does not make sense to change the flags.
+ */
+#define VFCF_STATIC 0x00010000 /* statically compiled into kernel */
+#define VFCF_NETWORK 0x00020000 /* may get data over the network */
+#define VFCF_READONLY 0x00040000 /* writes are not implemented */
+#define VFCF_SYNTHETIC 0x00080000 /* data does not represent real files */
+#define VFCF_LOOPBACK 0x00100000 /* aliases some other mounted FS */
+#define VFCF_UNICODE 0x00200000 /* stores file names as Unicode */
+#define VFCF_JAIL 0x00400000 /* can be mounted from within a jail */
+#define VFCF_DELEGADMIN 0x00800000 /* supports delegated administration */
+
+typedef uint32_t fsctlop_t;
+
+struct vfsidctl {
+ int vc_vers; /* should be VFSIDCTL_VERS1 (below) */
+ fsid_t vc_fsid; /* fsid to operate on */
+ char vc_fstypename[MFSNAMELEN];
+ /* type of fs 'nfs' or '*' */
+ fsctlop_t vc_op; /* operation VFS_CTL_* (below) */
+ void *vc_ptr; /* pointer to data structure */
+ size_t vc_len; /* sizeof said structure */
+ u_int32_t vc_spare[12]; /* spare (must be zero) */
+};
+
+/* vfsidctl API version. */
+#define VFS_CTL_VERS1 0x01
+
+/*
+ * New style VFS sysctls, do not reuse/conflict with the namespace for
+ * private sysctls.
+ * All "global" sysctl ops have the 33rd bit set:
+ * 0x...1....
+ * Private sysctl ops should have the 33rd bit unset.
+ */
+#define VFS_CTL_QUERY 0x00010001 /* anything wrong? (vfsquery) */
+#define VFS_CTL_TIMEO 0x00010002 /* set timeout for vfs notification */
+#define VFS_CTL_NOLOCKS 0x00010003 /* disable file locking */
+
+struct vfsquery {
+ u_int32_t vq_flags;
+ u_int32_t vq_spare[31];
+};
+
+/* vfsquery flags */
+#define VQ_NOTRESP 0x0001 /* server down */
+#define VQ_NEEDAUTH 0x0002 /* server bad auth */
+#define VQ_LOWDISK 0x0004 /* we're low on space */
+#define VQ_MOUNT 0x0008 /* new filesystem arrived */
+#define VQ_UNMOUNT 0x0010 /* filesystem has left */
+#define VQ_DEAD 0x0020 /* filesystem is dead, needs force unmount */
+#define VQ_ASSIST 0x0040 /* filesystem needs assistance from external
+ program */
+#define VQ_NOTRESPLOCK 0x0080 /* server lockd down */
+#define VQ_FLAG0100 0x0100 /* placeholder */
+#define VQ_FLAG0200 0x0200 /* placeholder */
+#define VQ_FLAG0400 0x0400 /* placeholder */
+#define VQ_FLAG0800 0x0800 /* placeholder */
+#define VQ_FLAG1000 0x1000 /* placeholder */
+#define VQ_FLAG2000 0x2000 /* placeholder */
+#define VQ_FLAG4000 0x4000 /* placeholder */
+#define VQ_FLAG8000 0x8000 /* placeholder */
+
+#ifdef _KERNEL
+/* Point a sysctl request at a vfsidctl's data. */
+#define VCTLTOREQ(vc, req) \
+ do { \
+ (req)->newptr = (vc)->vc_ptr; \
+ (req)->newlen = (vc)->vc_len; \
+ (req)->newidx = 0; \
+ } while (0)
+#endif
+
+struct iovec;
+struct uio;
+
+#ifdef _KERNEL
+
+/*
+ * vfs_busy specific flags and mask.
+ */
+#define MBF_NOWAIT 0x01
+#define MBF_MNTLSTLOCK 0x02
+#define MBF_MASK (MBF_NOWAIT | MBF_MNTLSTLOCK)
+
+#ifdef MALLOC_DECLARE
+MALLOC_DECLARE(M_MOUNT);
+#endif
+extern int maxvfsconf; /* highest defined filesystem type */
+extern int nfs_mount_type; /* vfc_typenum for nfs, or -1 */
+
+TAILQ_HEAD(vfsconfhead, vfsconf);
+extern struct vfsconfhead vfsconf;
+
+/*
+ * Operations supported on mounted filesystem.
+ */
+struct mount_args;
+struct nameidata;
+struct sysctl_req;
+struct mntarg;
+
+typedef int vfs_cmount_t(struct mntarg *ma, void *data, uint64_t flags);
+typedef int vfs_unmount_t(struct mount *mp, int mntflags);
+typedef int vfs_root_t(struct mount *mp, int flags, struct vnode **vpp);
+typedef int vfs_quotactl_t(struct mount *mp, int cmds, uid_t uid, void *arg);
+typedef int vfs_statfs_t(struct mount *mp, struct statfs *sbp);
+typedef int vfs_sync_t(struct mount *mp, int waitfor);
+typedef int vfs_vget_t(struct mount *mp, ino_t ino, int flags,
+ struct vnode **vpp);
+typedef int vfs_fhtovp_t(struct mount *mp, struct fid *fhp,
+ int flags, struct vnode **vpp);
+typedef int vfs_checkexp_t(struct mount *mp, struct sockaddr *nam,
+ int *extflagsp, struct ucred **credanonp,
+ int *numsecflavors, int **secflavors);
+typedef int vfs_init_t(struct vfsconf *);
+typedef int vfs_uninit_t(struct vfsconf *);
+typedef int vfs_extattrctl_t(struct mount *mp, int cmd,
+ struct vnode *filename_vp, int attrnamespace,
+ const char *attrname);
+typedef int vfs_mount_t(struct mount *mp);
+typedef int vfs_sysctl_t(struct mount *mp, fsctlop_t op,
+ struct sysctl_req *req);
+typedef void vfs_susp_clean_t(struct mount *mp);
+
+struct vfsops {
+ vfs_mount_t *vfs_mount;
+ vfs_cmount_t *vfs_cmount;
+ vfs_unmount_t *vfs_unmount;
+ vfs_root_t *vfs_root;
+ vfs_quotactl_t *vfs_quotactl;
+ vfs_statfs_t *vfs_statfs;
+ vfs_sync_t *vfs_sync;
+ vfs_vget_t *vfs_vget;
+ vfs_fhtovp_t *vfs_fhtovp;
+ vfs_checkexp_t *vfs_checkexp;
+ vfs_init_t *vfs_init;
+ vfs_uninit_t *vfs_uninit;
+ vfs_extattrctl_t *vfs_extattrctl;
+ vfs_sysctl_t *vfs_sysctl;
+ vfs_susp_clean_t *vfs_susp_clean;
+};
+
+vfs_statfs_t __vfs_statfs;
+
+#define VFS_MOUNT(MP) (*(MP)->mnt_op->vfs_mount)(MP)
+#define VFS_UNMOUNT(MP, FORCE) (*(MP)->mnt_op->vfs_unmount)(MP, FORCE)
+#define VFS_ROOT(MP, FLAGS, VPP) \
+ (*(MP)->mnt_op->vfs_root)(MP, FLAGS, VPP)
+#define VFS_QUOTACTL(MP, C, U, A) \
+ (*(MP)->mnt_op->vfs_quotactl)(MP, C, U, A)
+#define VFS_STATFS(MP, SBP) __vfs_statfs((MP), (SBP))
+#define VFS_SYNC(MP, WAIT) (*(MP)->mnt_op->vfs_sync)(MP, WAIT)
+#define VFS_VGET(MP, INO, FLAGS, VPP) \
+ (*(MP)->mnt_op->vfs_vget)(MP, INO, FLAGS, VPP)
+#define VFS_FHTOVP(MP, FIDP, FLAGS, VPP) \
+ (*(MP)->mnt_op->vfs_fhtovp)(MP, FIDP, FLAGS, VPP)
+#define VFS_CHECKEXP(MP, NAM, EXFLG, CRED, NUMSEC, SEC) \
+ (*(MP)->mnt_op->vfs_checkexp)(MP, NAM, EXFLG, CRED, NUMSEC, SEC)
+#define VFS_EXTATTRCTL(MP, C, FN, NS, N) \
+ (*(MP)->mnt_op->vfs_extattrctl)(MP, C, FN, NS, N)
+#define VFS_SYSCTL(MP, OP, REQ) \
+ (*(MP)->mnt_op->vfs_sysctl)(MP, OP, REQ)
+#define VFS_SUSP_CLEAN(MP) \
+ ({if (*(MP)->mnt_op->vfs_susp_clean != NULL) \
+ (*(MP)->mnt_op->vfs_susp_clean)(MP); })
+
+#define VFS_NEEDSGIANT_(MP) \
+ ((MP) != NULL && ((MP)->mnt_kern_flag & MNTK_MPSAFE) == 0)
+
+#define VFS_NEEDSGIANT(MP) __extension__ \
+({ \
+ struct mount *_mp; \
+ _mp = (MP); \
+ VFS_NEEDSGIANT_(_mp); \
+})
+
+#define VFS_LOCK_GIANT(MP) __extension__ \
+({ \
+ int _locked; \
+ struct mount *_mp; \
+ _mp = (MP); \
+ if (VFS_NEEDSGIANT_(_mp)) { \
+ mtx_lock(&Giant); \
+ _locked = 1; \
+ } else \
+ _locked = 0; \
+ _locked; \
+})
+#define VFS_UNLOCK_GIANT(locked) do \
+{ \
+ if ((locked)) \
+ mtx_unlock(&Giant); \
+} while (0)
+#define VFS_ASSERT_GIANT(MP) do \
+{ \
+ struct mount *_mp; \
+ _mp = (MP); \
+ if (VFS_NEEDSGIANT_(_mp)) \
+ mtx_assert(&Giant, MA_OWNED); \
+} while (0)
+
+#define VFS_KNOTE_LOCKED(vp, hint) do \
+{ \
+ if (((vp)->v_vflag & VV_NOKNOTE) == 0) \
+ VN_KNOTE((vp), (hint), KNF_LISTLOCKED); \
+} while (0)
+
+#define VFS_KNOTE_UNLOCKED(vp, hint) do \
+{ \
+ if (((vp)->v_vflag & VV_NOKNOTE) == 0) \
+ VN_KNOTE((vp), (hint), 0); \
+} while (0)
+
+#include <sys/module.h>
+
+/*
+ * Version numbers.
+ */
+#define VFS_VERSION_00 0x19660120
+#define VFS_VERSION VFS_VERSION_00
+
+#define VFS_SET(vfsops, fsname, flags) \
+ static struct vfsconf fsname ## _vfsconf = { \
+ .vfc_version = VFS_VERSION, \
+ .vfc_name = #fsname, \
+ .vfc_vfsops = &vfsops, \
+ .vfc_typenum = -1, \
+ .vfc_flags = flags, \
+ }; \
+ static moduledata_t fsname ## _mod = { \
+ #fsname, \
+ vfs_modevent, \
+ & fsname ## _vfsconf \
+ }; \
+ DECLARE_MODULE(fsname, fsname ## _mod, SI_SUB_VFS, SI_ORDER_MIDDLE)
+
+extern char *mountrootfsname;
+
+/*
+ * exported vnode operations
+ */
+
+int dounmount(struct mount *, int, struct thread *);
+
+int kernel_mount(struct mntarg *ma, uint64_t flags);
+int kernel_vmount(int flags, ...);
+struct mntarg *mount_arg(struct mntarg *ma, const char *name, const void *val, int len);
+struct mntarg *mount_argb(struct mntarg *ma, int flag, const char *name);
+struct mntarg *mount_argf(struct mntarg *ma, const char *name, const char *fmt, ...);
+struct mntarg *mount_argsu(struct mntarg *ma, const char *name, const void *val, int len);
+void statfs_scale_blocks(struct statfs *sf, long max_size);
+struct vfsconf *vfs_byname(const char *);
+struct vfsconf *vfs_byname_kld(const char *, struct thread *td, int *);
+void vfs_mount_destroy(struct mount *);
+void vfs_event_signal(fsid_t *, u_int32_t, intptr_t);
+void vfs_freeopts(struct vfsoptlist *opts);
+void vfs_deleteopt(struct vfsoptlist *opts, const char *name);
+int vfs_buildopts(struct uio *auio, struct vfsoptlist **options);
+int vfs_flagopt(struct vfsoptlist *opts, const char *name, uint64_t *w,
+ uint64_t val);
+int vfs_getopt(struct vfsoptlist *, const char *, void **, int *);
+int vfs_getopt_pos(struct vfsoptlist *opts, const char *name);
+int vfs_getopt_size(struct vfsoptlist *opts, const char *name,
+ off_t *value);
+char *vfs_getopts(struct vfsoptlist *, const char *, int *error);
+int vfs_copyopt(struct vfsoptlist *, const char *, void *, int);
+int vfs_filteropt(struct vfsoptlist *, const char **legal);
+void vfs_opterror(struct vfsoptlist *opts, const char *fmt, ...);
+int vfs_scanopt(struct vfsoptlist *opts, const char *name, const char *fmt, ...);
+int vfs_setopt(struct vfsoptlist *opts, const char *name, void *value,
+ int len);
+int vfs_setopt_part(struct vfsoptlist *opts, const char *name, void *value,
+ int len);
+int vfs_setopts(struct vfsoptlist *opts, const char *name,
+ const char *value);
+int vfs_setpublicfs /* set publicly exported fs */
+ (struct mount *, struct netexport *, struct export_args *);
+void vfs_msync(struct mount *, int);
+int vfs_busy(struct mount *, int);
+int vfs_export /* process mount export info */
+ (struct mount *, struct export_args *);
+void vfs_allocate_syncvnode(struct mount *);
+void vfs_deallocate_syncvnode(struct mount *);
+int vfs_donmount(struct thread *td, uint64_t fsflags,
+ struct uio *fsoptions);
+void vfs_getnewfsid(struct mount *);
+struct cdev *vfs_getrootfsid(struct mount *);
+struct mount *vfs_getvfs(fsid_t *); /* return vfs given fsid */
+struct mount *vfs_busyfs(fsid_t *);
+int vfs_modevent(module_t, int, void *);
+void vfs_mount_error(struct mount *, const char *, ...);
+void vfs_mountroot(void); /* mount our root filesystem */
+void vfs_mountedfrom(struct mount *, const char *from);
+void vfs_oexport_conv(const struct oexport_args *oexp,
+ struct export_args *exp);
+void vfs_ref(struct mount *);
+void vfs_rel(struct mount *);
+struct mount *vfs_mount_alloc(struct vnode *, struct vfsconf *, const char *,
+ struct ucred *);
+int vfs_suser(struct mount *, struct thread *);
+void vfs_unbusy(struct mount *);
+void vfs_unmountall(void);
+extern TAILQ_HEAD(mntlist, mount) mountlist; /* mounted filesystem list */
+extern struct mtx mountlist_mtx;
+extern struct nfs_public nfs_pub;
+
+/*
+ * Declarations for these vfs default operations are located in
+ * kern/vfs_default.c, they should be used instead of making "dummy"
+ * functions or casting entries in the VFS op table to "enopnotsupp()".
+ */
+vfs_root_t vfs_stdroot;
+vfs_quotactl_t vfs_stdquotactl;
+vfs_statfs_t vfs_stdstatfs;
+vfs_sync_t vfs_stdsync;
+vfs_sync_t vfs_stdnosync;
+vfs_vget_t vfs_stdvget;
+vfs_fhtovp_t vfs_stdfhtovp;
+vfs_checkexp_t vfs_stdcheckexp;
+vfs_init_t vfs_stdinit;
+vfs_uninit_t vfs_stduninit;
+vfs_extattrctl_t vfs_stdextattrctl;
+vfs_sysctl_t vfs_stdsysctl;
+
+#else /* !_KERNEL */
+
+#include <sys/cdefs.h>
+
+struct stat;
+
+__BEGIN_DECLS
+int fhopen(const struct fhandle *, int);
+int fhstat(const struct fhandle *, struct stat *);
+int fhstatfs(const struct fhandle *, struct statfs *);
+int fstatfs(int, struct statfs *);
+int getfh(const char *, fhandle_t *);
+int getfsstat(struct statfs *, long, int);
+int getmntinfo(struct statfs **, int);
+int lgetfh(const char *, fhandle_t *);
+int mount(const char *, const char *, int, void *);
+int nmount(struct iovec *, unsigned int, int);
+int statfs(const char *, struct statfs *);
+int unmount(const char *, int);
+
+/* C library stuff */
+int getvfsbyname(const char *, struct xvfsconf *);
+__END_DECLS
+
+#endif /* _KERNEL */
+
+#endif /* !_SYS_MOUNT_H_ */
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