bc2258da88
Porters should refer to __FreeBSD_version 1000021 for this change as it may have happened at the same timeframe.
836 lines
32 KiB
C
836 lines
32 KiB
C
/*-
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* Copyright (c) 1989, 1991, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)mount.h 8.21 (Berkeley) 5/20/95
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* $FreeBSD$
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*/
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#ifndef _SYS_MOUNT_H_
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#define _SYS_MOUNT_H_
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#include <sys/ucred.h>
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#include <sys/queue.h>
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#ifdef _KERNEL
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#include <sys/lock.h>
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#include <sys/lockmgr.h>
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#include <sys/_mutex.h>
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#endif
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/*
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* NOTE: When changing statfs structure, mount structure, MNT_* flags or
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* MNTK_* flags also update DDB show mount command in vfs_subr.c.
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*/
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typedef struct fsid { int32_t val[2]; } fsid_t; /* filesystem id type */
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/*
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* File identifier.
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* These are unique per filesystem on a single machine.
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*/
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#define MAXFIDSZ 16
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struct fid {
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u_short fid_len; /* length of data in bytes */
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u_short fid_data0; /* force longword alignment */
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char fid_data[MAXFIDSZ]; /* data (variable length) */
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};
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/*
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* filesystem statistics
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*/
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#define MFSNAMELEN 16 /* length of type name including null */
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#define MNAMELEN 88 /* size of on/from name bufs */
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#define STATFS_VERSION 0x20030518 /* current version number */
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struct statfs {
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uint32_t f_version; /* structure version number */
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uint32_t f_type; /* type of filesystem */
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uint64_t f_flags; /* copy of mount exported flags */
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uint64_t f_bsize; /* filesystem fragment size */
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uint64_t f_iosize; /* optimal transfer block size */
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uint64_t f_blocks; /* total data blocks in filesystem */
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uint64_t f_bfree; /* free blocks in filesystem */
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int64_t f_bavail; /* free blocks avail to non-superuser */
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uint64_t f_files; /* total file nodes in filesystem */
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int64_t f_ffree; /* free nodes avail to non-superuser */
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uint64_t f_syncwrites; /* count of sync writes since mount */
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uint64_t f_asyncwrites; /* count of async writes since mount */
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uint64_t f_syncreads; /* count of sync reads since mount */
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uint64_t f_asyncreads; /* count of async reads since mount */
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uint64_t f_spare[10]; /* unused spare */
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uint32_t f_namemax; /* maximum filename length */
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uid_t f_owner; /* user that mounted the filesystem */
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fsid_t f_fsid; /* filesystem id */
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char f_charspare[80]; /* spare string space */
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char f_fstypename[MFSNAMELEN]; /* filesystem type name */
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char f_mntfromname[MNAMELEN]; /* mounted filesystem */
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char f_mntonname[MNAMELEN]; /* directory on which mounted */
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};
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#ifdef _KERNEL
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#define OMFSNAMELEN 16 /* length of fs type name, including null */
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#define OMNAMELEN (88 - 2 * sizeof(long)) /* size of on/from name bufs */
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/* XXX getfsstat.2 is out of date with write and read counter changes here. */
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/* XXX statfs.2 is out of date with read counter changes here. */
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struct ostatfs {
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long f_spare2; /* placeholder */
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long f_bsize; /* fundamental filesystem block size */
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long f_iosize; /* optimal transfer block size */
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long f_blocks; /* total data blocks in filesystem */
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long f_bfree; /* free blocks in fs */
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long f_bavail; /* free blocks avail to non-superuser */
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long f_files; /* total file nodes in filesystem */
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long f_ffree; /* free file nodes in fs */
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fsid_t f_fsid; /* filesystem id */
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uid_t f_owner; /* user that mounted the filesystem */
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int f_type; /* type of filesystem */
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int f_flags; /* copy of mount exported flags */
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long f_syncwrites; /* count of sync writes since mount */
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long f_asyncwrites; /* count of async writes since mount */
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char f_fstypename[OMFSNAMELEN]; /* fs type name */
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char f_mntonname[OMNAMELEN]; /* directory on which mounted */
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long f_syncreads; /* count of sync reads since mount */
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long f_asyncreads; /* count of async reads since mount */
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short f_spares1; /* unused spare */
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char f_mntfromname[OMNAMELEN];/* mounted filesystem */
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short f_spares2; /* unused spare */
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/*
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* XXX on machines where longs are aligned to 8-byte boundaries, there
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* is an unnamed int32_t here. This spare was after the apparent end
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* of the struct until we bit off the read counters from f_mntonname.
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*/
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long f_spare[2]; /* unused spare */
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};
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TAILQ_HEAD(vnodelst, vnode);
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/* Mount options list */
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TAILQ_HEAD(vfsoptlist, vfsopt);
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struct vfsopt {
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TAILQ_ENTRY(vfsopt) link;
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char *name;
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void *value;
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int len;
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int pos;
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int seen;
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};
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/*
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* Structure per mounted filesystem. Each mounted filesystem has an
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* array of operations and an instance record. The filesystems are
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* put on a doubly linked list.
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*
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* Lock reference:
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* m - mountlist_mtx
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* i - interlock
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* v - vnode freelist mutex
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*
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* Unmarked fields are considered stable as long as a ref is held.
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*
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*/
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struct mount {
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struct mtx mnt_mtx; /* mount structure interlock */
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int mnt_gen; /* struct mount generation */
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#define mnt_startzero mnt_list
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TAILQ_ENTRY(mount) mnt_list; /* (m) mount list */
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struct vfsops *mnt_op; /* operations on fs */
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struct vfsconf *mnt_vfc; /* configuration info */
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struct vnode *mnt_vnodecovered; /* vnode we mounted on */
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struct vnode *mnt_syncer; /* syncer vnode */
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int mnt_ref; /* (i) Reference count */
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struct vnodelst mnt_nvnodelist; /* (i) list of vnodes */
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int mnt_nvnodelistsize; /* (i) # of vnodes */
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struct vnodelst mnt_activevnodelist; /* (v) list of active vnodes */
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int mnt_activevnodelistsize;/* (v) # of active vnodes */
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int mnt_writeopcount; /* (i) write syscalls pending */
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int mnt_kern_flag; /* (i) kernel only flags */
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uint64_t mnt_flag; /* (i) flags shared with user */
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struct vfsoptlist *mnt_opt; /* current mount options */
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struct vfsoptlist *mnt_optnew; /* new options passed to fs */
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int mnt_maxsymlinklen; /* max size of short symlink */
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struct statfs mnt_stat; /* cache of filesystem stats */
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struct ucred *mnt_cred; /* credentials of mounter */
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void * mnt_data; /* private data */
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time_t mnt_time; /* last time written*/
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int mnt_iosize_max; /* max size for clusters, etc */
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struct netexport *mnt_export; /* export list */
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struct label *mnt_label; /* MAC label for the fs */
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u_int mnt_hashseed; /* Random seed for vfs_hash */
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int mnt_lockref; /* (i) Lock reference count */
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int mnt_secondary_writes; /* (i) # of secondary writes */
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int mnt_secondary_accwrites;/* (i) secondary wr. starts */
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struct thread *mnt_susp_owner; /* (i) thread owning suspension */
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#define mnt_endzero mnt_gjprovider
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char *mnt_gjprovider; /* gjournal provider name */
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struct lock mnt_explock; /* vfs_export walkers lock */
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TAILQ_ENTRY(mount) mnt_upper_link; /* (m) we in the all uppers */
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TAILQ_HEAD(, mount) mnt_uppers; /* (m) upper mounts over us*/
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};
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/*
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* Definitions for MNT_VNODE_FOREACH_ALL.
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*/
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struct vnode *__mnt_vnode_next_all(struct vnode **mvp, struct mount *mp);
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struct vnode *__mnt_vnode_first_all(struct vnode **mvp, struct mount *mp);
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void __mnt_vnode_markerfree_all(struct vnode **mvp, struct mount *mp);
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#define MNT_VNODE_FOREACH_ALL(vp, mp, mvp) \
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for (vp = __mnt_vnode_first_all(&(mvp), (mp)); \
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(vp) != NULL; vp = __mnt_vnode_next_all(&(mvp), (mp)))
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#define MNT_VNODE_FOREACH_ALL_ABORT(mp, mvp) \
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do { \
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MNT_ILOCK(mp); \
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__mnt_vnode_markerfree_all(&(mvp), (mp)); \
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/* MNT_IUNLOCK(mp); -- done in above function */ \
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mtx_assert(MNT_MTX(mp), MA_NOTOWNED); \
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} while (0)
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/*
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* Definitions for MNT_VNODE_FOREACH_ACTIVE.
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*/
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struct vnode *__mnt_vnode_next_active(struct vnode **mvp, struct mount *mp);
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struct vnode *__mnt_vnode_first_active(struct vnode **mvp, struct mount *mp);
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void __mnt_vnode_markerfree_active(struct vnode **mvp, struct mount *);
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#define MNT_VNODE_FOREACH_ACTIVE(vp, mp, mvp) \
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for (vp = __mnt_vnode_first_active(&(mvp), (mp)); \
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(vp) != NULL; vp = __mnt_vnode_next_active(&(mvp), (mp)))
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#define MNT_VNODE_FOREACH_ACTIVE_ABORT(mp, mvp) \
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do { \
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MNT_ILOCK(mp); \
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__mnt_vnode_markerfree_active(&(mvp), (mp)); \
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/* MNT_IUNLOCK(mp); -- done in above function */ \
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mtx_assert(MNT_MTX(mp), MA_NOTOWNED); \
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} while (0)
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/*
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* Definitions for MNT_VNODE_FOREACH.
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*
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* This interface has been deprecated in favor of MNT_VNODE_FOREACH_ALL.
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*/
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struct vnode *__mnt_vnode_next(struct vnode **mvp, struct mount *mp);
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struct vnode *__mnt_vnode_first(struct vnode **mvp, struct mount *mp);
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void __mnt_vnode_markerfree(struct vnode **mvp, struct mount *mp);
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#define MNT_VNODE_FOREACH(vp, mp, mvp) \
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for (vp = __mnt_vnode_first(&(mvp), (mp)); \
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(vp) != NULL; vp = __mnt_vnode_next(&(mvp), (mp)))
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#define MNT_VNODE_FOREACH_ABORT_ILOCKED(mp, mvp) \
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__mnt_vnode_markerfree(&(mvp), (mp))
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#define MNT_VNODE_FOREACH_ABORT(mp, mvp) \
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do { \
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MNT_ILOCK(mp); \
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MNT_VNODE_FOREACH_ABORT_ILOCKED(mp, mvp); \
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MNT_IUNLOCK(mp); \
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} while (0)
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#define MNT_ILOCK(mp) mtx_lock(&(mp)->mnt_mtx)
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#define MNT_ITRYLOCK(mp) mtx_trylock(&(mp)->mnt_mtx)
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#define MNT_IUNLOCK(mp) mtx_unlock(&(mp)->mnt_mtx)
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#define MNT_MTX(mp) (&(mp)->mnt_mtx)
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#define MNT_REF(mp) (mp)->mnt_ref++
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#define MNT_REL(mp) do { \
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KASSERT((mp)->mnt_ref > 0, ("negative mnt_ref")); \
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(mp)->mnt_ref--; \
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if ((mp)->mnt_ref == 0) \
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wakeup((mp)); \
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} while (0)
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#endif /* _KERNEL */
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/*
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* User specifiable flags, stored in mnt_flag.
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*/
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#define MNT_RDONLY 0x0000000000000001ULL /* read only filesystem */
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#define MNT_SYNCHRONOUS 0x0000000000000002ULL /* fs written synchronously */
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#define MNT_NOEXEC 0x0000000000000004ULL /* can't exec from filesystem */
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#define MNT_NOSUID 0x0000000000000008ULL /* don't honor setuid fs bits */
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#define MNT_NFS4ACLS 0x0000000000000010ULL /* enable NFS version 4 ACLs */
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#define MNT_UNION 0x0000000000000020ULL /* union with underlying fs */
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#define MNT_ASYNC 0x0000000000000040ULL /* fs written asynchronously */
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#define MNT_SUIDDIR 0x0000000000100000ULL /* special SUID dir handling */
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#define MNT_SOFTDEP 0x0000000000200000ULL /* using soft updates */
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#define MNT_NOSYMFOLLOW 0x0000000000400000ULL /* do not follow symlinks */
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#define MNT_GJOURNAL 0x0000000002000000ULL /* GEOM journal support enabled */
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#define MNT_MULTILABEL 0x0000000004000000ULL /* MAC support for objects */
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#define MNT_ACLS 0x0000000008000000ULL /* ACL support enabled */
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#define MNT_NOATIME 0x0000000010000000ULL /* dont update file access time */
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#define MNT_NOCLUSTERR 0x0000000040000000ULL /* disable cluster read */
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#define MNT_NOCLUSTERW 0x0000000080000000ULL /* disable cluster write */
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#define MNT_SUJ 0x0000000100000000ULL /* using journaled soft updates */
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/*
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* NFS export related mount flags.
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*/
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#define MNT_EXRDONLY 0x0000000000000080ULL /* exported read only */
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#define MNT_EXPORTED 0x0000000000000100ULL /* filesystem is exported */
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#define MNT_DEFEXPORTED 0x0000000000000200ULL /* exported to the world */
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#define MNT_EXPORTANON 0x0000000000000400ULL /* anon uid mapping for all */
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#define MNT_EXKERB 0x0000000000000800ULL /* exported with Kerberos */
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#define MNT_EXPUBLIC 0x0000000020000000ULL /* public export (WebNFS) */
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/*
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* Flags set by internal operations,
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* but visible to the user.
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* XXX some of these are not quite right.. (I've never seen the root flag set)
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*/
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#define MNT_LOCAL 0x0000000000001000ULL /* filesystem is stored locally */
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#define MNT_QUOTA 0x0000000000002000ULL /* quotas are enabled on fs */
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#define MNT_ROOTFS 0x0000000000004000ULL /* identifies the root fs */
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#define MNT_USER 0x0000000000008000ULL /* mounted by a user */
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#define MNT_IGNORE 0x0000000000800000ULL /* do not show entry in df */
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/*
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* Mask of flags that are visible to statfs().
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* XXX I think that this could now become (~(MNT_CMDFLAGS))
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* but the 'mount' program may need changing to handle this.
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*/
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#define MNT_VISFLAGMASK (MNT_RDONLY | MNT_SYNCHRONOUS | MNT_NOEXEC | \
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MNT_NOSUID | MNT_UNION | MNT_SUJ | \
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MNT_ASYNC | MNT_EXRDONLY | MNT_EXPORTED | \
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MNT_DEFEXPORTED | MNT_EXPORTANON| MNT_EXKERB | \
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MNT_LOCAL | MNT_USER | MNT_QUOTA | \
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MNT_ROOTFS | MNT_NOATIME | MNT_NOCLUSTERR| \
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MNT_NOCLUSTERW | MNT_SUIDDIR | MNT_SOFTDEP | \
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MNT_IGNORE | MNT_EXPUBLIC | MNT_NOSYMFOLLOW | \
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MNT_GJOURNAL | MNT_MULTILABEL | MNT_ACLS | \
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MNT_NFS4ACLS)
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/* Mask of flags that can be updated. */
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#define MNT_UPDATEMASK (MNT_NOSUID | MNT_NOEXEC | \
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MNT_SYNCHRONOUS | MNT_UNION | MNT_ASYNC | \
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MNT_NOATIME | \
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MNT_NOSYMFOLLOW | MNT_IGNORE | \
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MNT_NOCLUSTERR | MNT_NOCLUSTERW | MNT_SUIDDIR | \
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MNT_ACLS | MNT_USER | MNT_NFS4ACLS)
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/*
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* External filesystem command modifier flags.
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* Unmount can use the MNT_FORCE flag.
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* XXX: These are not STATES and really should be somewhere else.
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* XXX: MNT_BYFSID collides with MNT_ACLS, but because MNT_ACLS is only used for
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* mount(2) and MNT_BYFSID is only used for unmount(2) it's harmless.
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*/
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#define MNT_UPDATE 0x0000000000010000ULL /* not real mount, just update */
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#define MNT_DELEXPORT 0x0000000000020000ULL /* delete export host lists */
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#define MNT_RELOAD 0x0000000000040000ULL /* reload filesystem data */
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#define MNT_FORCE 0x0000000000080000ULL /* force unmount or readonly */
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#define MNT_SNAPSHOT 0x0000000001000000ULL /* snapshot the filesystem */
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#define MNT_BYFSID 0x0000000008000000ULL /* specify filesystem by ID. */
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#define MNT_CMDFLAGS (MNT_UPDATE | MNT_DELEXPORT | MNT_RELOAD | \
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MNT_FORCE | MNT_SNAPSHOT | MNT_BYFSID)
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/*
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* Internal filesystem control flags stored in mnt_kern_flag.
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*
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* MNTK_UNMOUNT locks the mount entry so that name lookup cannot proceed
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* past the mount point. This keeps the subtree stable during mounts
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* and unmounts.
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*
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* MNTK_UNMOUNTF permits filesystems to detect a forced unmount while
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* dounmount() is still waiting to lock the mountpoint. This allows
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* the filesystem to cancel operations that might otherwise deadlock
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* with the unmount attempt (used by NFS).
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*
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* MNTK_NOINSMNTQ is strict subset of MNTK_UNMOUNT. They are separated
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* to allow for failed unmount attempt to restore the syncer vnode for
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* the mount.
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*/
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#define MNTK_UNMOUNTF 0x00000001 /* forced unmount in progress */
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#define MNTK_ASYNC 0x00000002 /* filtered async flag */
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#define MNTK_SOFTDEP 0x00000004 /* async disabled by softdep */
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#define MNTK_NOINSMNTQ 0x00000008 /* insmntque is not allowed */
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#define MNTK_DRAINING 0x00000010 /* lock draining is happening */
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#define MNTK_REFEXPIRE 0x00000020 /* refcount expiring is happening */
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#define MNTK_EXTENDED_SHARED 0x00000040 /* Allow shared locking for more ops */
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#define MNTK_SHARED_WRITES 0x00000080 /* Allow shared locking for writes */
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#define MNTK_NO_IOPF 0x00000100 /* Disallow page faults during reads
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and writes. Filesystem shall properly
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handle i/o state on EFAULT. */
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#define MNTK_VGONE_UPPER 0x00000200
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#define MNTK_VGONE_WAITER 0x00000400
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#define MNTK_LOOKUP_EXCL_DOTDOT 0x00000800
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#define MNTK_MARKER 0x00001000
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#define MNTK_NOASYNC 0x00800000 /* disable async */
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#define MNTK_UNMOUNT 0x01000000 /* unmount in progress */
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#define MNTK_MWAIT 0x02000000 /* waiting for unmount to finish */
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#define MNTK_SUSPEND 0x08000000 /* request write suspension */
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#define MNTK_SUSPEND2 0x04000000 /* block secondary writes */
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#define MNTK_SUSPENDED 0x10000000 /* write operations are suspended */
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#define MNTK_UNUSED25 0x20000000 /* --available-- */
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#define MNTK_LOOKUP_SHARED 0x40000000 /* FS supports shared lock lookups */
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#define MNTK_NOKNOTE 0x80000000 /* Don't send KNOTEs from VOP hooks */
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|
|
#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);
|
|
typedef void vfs_reclaim_lowervp_t(struct mount *mp, struct vnode *lowervp);
|
|
|
|
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_reclaim_lowervp_t *vfs_reclaim_lowervp;
|
|
};
|
|
|
|
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_RECLAIM_LOWERVP(MP, VP) \
|
|
({if (*(MP)->mnt_op->vfs_reclaim_lowervp != NULL) \
|
|
(*(MP)->mnt_op->vfs_reclaim_lowervp)((MP), (VP)); })
|
|
|
|
#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_01 0x20121030
|
|
#define VFS_VERSION VFS_VERSION_01
|
|
|
|
#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 */
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#include <sys/cdefs.h>
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struct stat;
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__BEGIN_DECLS
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int fhopen(const struct fhandle *, int);
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int fhstat(const struct fhandle *, struct stat *);
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int fhstatfs(const struct fhandle *, struct statfs *);
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int fstatfs(int, struct statfs *);
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int getfh(const char *, fhandle_t *);
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int getfsstat(struct statfs *, long, int);
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int getmntinfo(struct statfs **, int);
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int lgetfh(const char *, fhandle_t *);
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int mount(const char *, const char *, int, void *);
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int nmount(struct iovec *, unsigned int, int);
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int statfs(const char *, struct statfs *);
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int unmount(const char *, int);
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/* C library stuff */
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int getvfsbyname(const char *, struct xvfsconf *);
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__END_DECLS
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#endif /* _KERNEL */
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#endif /* !_SYS_MOUNT_H_ */
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