245b204491
prevents insmntque() from placing reallocated syncer vnode on mount list, that causes panic in vfs_allocate_syncvnode(). Introduce MNTK_NOINSMNTQ flag, that marks the period when instmntque is not allowed to success, instead of MNTK_UNMOUNT. The MNTK_NOINSMNTQ is set and cleared simultaneously with MNTK_UNMOUNT, except on umount error path, where it is cleaned just before the syncer vnode is going to be allocated. Reported by: Peter Jeremy <peterjeremy optushome com au> Suggested by: tegge Approved by: re (rwatson)
744 lines
27 KiB
C
744 lines
27 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/lockmgr.h>
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#include <sys/_lock.h>
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#include <sys/_mutex.h>
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#endif
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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_reserved; /* 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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#define MMAXOPTIONLEN 65536 /* maximum length of a mount option */
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TAILQ_HEAD(vnodelst, vnode);
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struct vfsoptlist;
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struct vfsopt;
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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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* l - mnt_lock
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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 lock mnt_lock; /* mount structure lock */
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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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int mnt_writeopcount; /* (i) write syscalls pending */
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int mnt_kern_flag; /* (i) kernel only flags */
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u_int mnt_flag; /* (i) flags shared with user */
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u_int mnt_noasync; /* (i) # noasync overrides */
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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_markercnt; /* marker vnodes in use */
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int mnt_holdcnt; /* hold count */
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int mnt_holdcntwaiters; /* waits on hold 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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#define mnt_endzero mnt_gjprovider
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char *mnt_gjprovider; /* gjournal provider name */
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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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(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.
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*/
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#define MNT_RDONLY 0x00000001 /* read only filesystem */
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#define MNT_SYNCHRONOUS 0x00000002 /* filesystem written synchronously */
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#define MNT_NOEXEC 0x00000004 /* can't exec from filesystem */
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#define MNT_NOSUID 0x00000008 /* don't honor setuid bits on fs */
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#define MNT_UNION 0x00000020 /* union with underlying filesystem */
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#define MNT_ASYNC 0x00000040 /* filesystem written asynchronously */
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#define MNT_SUIDDIR 0x00100000 /* special handling of SUID on dirs */
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#define MNT_SOFTDEP 0x00200000 /* soft updates being done */
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#define MNT_NOSYMFOLLOW 0x00400000 /* do not follow symlinks */
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#define MNT_GJOURNAL 0x02000000 /* GEOM journal support enabled */
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#define MNT_MULTILABEL 0x04000000 /* MAC support for individual objects */
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#define MNT_ACLS 0x08000000 /* ACL support enabled */
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#define MNT_NOATIME 0x10000000 /* disable update of file access time */
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#define MNT_NOCLUSTERR 0x40000000 /* disable cluster read */
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#define MNT_NOCLUSTERW 0x80000000 /* disable cluster write */
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/*
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* NFS export related mount flags.
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*/
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#define MNT_EXRDONLY 0x00000080 /* exported read only */
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#define MNT_EXPORTED 0x00000100 /* filesystem is exported */
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#define MNT_DEFEXPORTED 0x00000200 /* exported to the world */
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#define MNT_EXPORTANON 0x00000400 /* use anon uid mapping for everyone */
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#define MNT_EXKERB 0x00000800 /* exported with Kerberos uid mapping */
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#define MNT_EXPUBLIC 0x20000000 /* 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 0x00001000 /* filesystem is stored locally */
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#define MNT_QUOTA 0x00002000 /* quotas are enabled on filesystem */
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#define MNT_ROOTFS 0x00004000 /* identifies the root filesystem */
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#define MNT_USER 0x00008000 /* mounted by a user */
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#define MNT_IGNORE 0x00800000 /* 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 | \
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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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/* 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)
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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 0x00010000 /* not a real mount, just an update */
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#define MNT_DELEXPORT 0x00020000 /* delete export host lists */
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#define MNT_RELOAD 0x00040000 /* reload filesystem data */
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#define MNT_FORCE 0x00080000 /* force unmount or readonly change */
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#define MNT_SNAPSHOT 0x01000000 /* snapshot the filesystem */
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#define MNT_BYFSID 0x08000000 /* 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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* Still available.
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*/
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#define MNT_SPARE_0x00000010 0x00000010
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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_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_MPSAFE 0x20000000 /* Filesystem is MPSAFE. */
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#define MNTK_NOKNOTE 0x80000000 /* Don't send KNOTEs from VOP hooks */
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#define MNTK_LOOKUP_SHARED 0x40000000 /* FS supports shared lock lookups */
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/*
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* Sysctl CTL_VFS definitions.
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*
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* Second level identifier specifies which filesystem. Second level
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* identifier VFS_VFSCONF returns information about all filesystems.
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* Second level identifier VFS_GENERIC is non-terminal.
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*/
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#define VFS_VFSCONF 0 /* get configured filesystems */
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#define VFS_GENERIC 0 /* generic filesystem information */
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/*
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* Third level identifiers for VFS_GENERIC are given below; third
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* level identifiers for specific filesystems are given in their
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* mount specific header files.
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*/
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#define VFS_MAXTYPENUM 1 /* int: highest defined filesystem type */
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#define VFS_CONF 2 /* struct: vfsconf for filesystem given
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as next argument */
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/*
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* Flags for various system call interfaces.
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*
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* waitfor flags to vfs_sync() and getfsstat()
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*/
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#define MNT_WAIT 1 /* synchronously wait for I/O to complete */
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#define MNT_NOWAIT 2 /* start all I/O, but do not wait for it */
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#define MNT_LAZY 3 /* push data not written by filesystem syncer */
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#define MNT_SUSPEND 4 /* Suspend file system after sync */
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/*
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* Generic file handle
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*/
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struct fhandle {
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fsid_t fh_fsid; /* Filesystem id of mount point */
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struct fid fh_fid; /* Filesys specific id */
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};
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typedef struct fhandle fhandle_t;
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/*
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* Export arguments for local filesystem mount calls.
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*/
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struct export_args {
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int ex_flags; /* export related flags */
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uid_t ex_root; /* mapping for root uid */
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struct xucred ex_anon; /* mapping for anonymous user */
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struct sockaddr *ex_addr; /* net address to which exported */
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u_char ex_addrlen; /* and the net address length */
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struct sockaddr *ex_mask; /* mask of valid bits in saddr */
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u_char ex_masklen; /* and the smask length */
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char *ex_indexfile; /* index file for WebNFS URLs */
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};
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/*
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* Structure holding information for a publicly exported filesystem
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* (WebNFS). Currently the specs allow just for one such filesystem.
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*/
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struct nfs_public {
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int np_valid; /* Do we hold valid information */
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fhandle_t np_handle; /* Filehandle for pub fs (internal) */
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struct mount *np_mount; /* Mountpoint of exported fs */
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char *np_index; /* Index file */
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};
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/*
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* Filesystem configuration information. One of these exists for each
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* type of filesystem supported by the kernel. These are searched at
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* mount time to identify the requested filesystem.
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*
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* XXX: Never change the first two arguments!
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*/
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struct vfsconf {
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u_int vfc_version; /* ABI version number */
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char vfc_name[MFSNAMELEN]; /* filesystem type name */
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struct vfsops *vfc_vfsops; /* filesystem operations vector */
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int vfc_typenum; /* historic filesystem type number */
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int vfc_refcount; /* number mounted of this type */
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int vfc_flags; /* permanent flags */
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struct vfsoptdecl *vfc_opts; /* mount options */
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TAILQ_ENTRY(vfsconf) vfc_list; /* list of vfscons */
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};
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/* Userland version of the struct vfsconf. */
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struct xvfsconf {
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struct vfsops *vfc_vfsops; /* filesystem operations vector */
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char vfc_name[MFSNAMELEN]; /* filesystem type name */
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int vfc_typenum; /* historic filesystem type number */
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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 */
|
|
|
|
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
|
|
|
|
#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, int flags, struct thread *td);
|
|
typedef int vfs_unmount_t(struct mount *mp, int mntflags, struct thread *td);
|
|
typedef int vfs_root_t(struct mount *mp, int flags, struct vnode **vpp,
|
|
struct thread *td);
|
|
typedef int vfs_quotactl_t(struct mount *mp, int cmds, uid_t uid,
|
|
void *arg, struct thread *td);
|
|
typedef int vfs_statfs_t(struct mount *mp, struct statfs *sbp,
|
|
struct thread *td);
|
|
typedef int vfs_sync_t(struct mount *mp, int waitfor, struct thread *td);
|
|
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, struct vnode **vpp);
|
|
typedef int vfs_checkexp_t(struct mount *mp, struct sockaddr *nam,
|
|
int *extflagsp, struct ucred **credanonp);
|
|
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, struct thread *td);
|
|
typedef int vfs_mount_t(struct mount *mp, struct thread *td);
|
|
typedef int vfs_sysctl_t(struct mount *mp, fsctlop_t op,
|
|
struct sysctl_req *req);
|
|
|
|
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_statfs_t __vfs_statfs;
|
|
|
|
#define VFS_MOUNT(MP, P) (*(MP)->mnt_op->vfs_mount)(MP, P)
|
|
#define VFS_UNMOUNT(MP, FORCE, P) (*(MP)->mnt_op->vfs_unmount)(MP, FORCE, P)
|
|
#define VFS_ROOT(MP, FLAGS, VPP, P) \
|
|
(*(MP)->mnt_op->vfs_root)(MP, FLAGS, VPP, P)
|
|
#define VFS_QUOTACTL(MP,C,U,A,P) (*(MP)->mnt_op->vfs_quotactl)(MP, C, U, A, P)
|
|
#define VFS_STATFS(MP, SBP, P) __vfs_statfs((MP), (SBP), (P))
|
|
#define VFS_SYNC(MP, WAIT, P) (*(MP)->mnt_op->vfs_sync)(MP, WAIT, P)
|
|
#define VFS_VGET(MP, INO, FLAGS, VPP) \
|
|
(*(MP)->mnt_op->vfs_vget)(MP, INO, FLAGS, VPP)
|
|
#define VFS_FHTOVP(MP, FIDP, VPP) \
|
|
(*(MP)->mnt_op->vfs_fhtovp)(MP, FIDP, VPP)
|
|
#define VFS_CHECKEXP(MP, NAM, EXFLG, CRED) \
|
|
(*(MP)->mnt_op->vfs_checkexp)(MP, NAM, EXFLG, CRED)
|
|
#define VFS_EXTATTRCTL(MP, C, FN, NS, N, P) \
|
|
(*(MP)->mnt_op->vfs_extattrctl)(MP, C, FN, NS, N, P)
|
|
#define VFS_SYSCTL(MP, OP, REQ) \
|
|
(*(MP)->mnt_op->vfs_sysctl)(MP, OP, REQ)
|
|
|
|
extern int mpsafe_vfs;
|
|
|
|
#define VFS_NEEDSGIANT_(MP) \
|
|
(!mpsafe_vfs || ((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) if ((locked)) mtx_unlock(&Giant);
|
|
#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), 1); \
|
|
} 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, int 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_flagopt(struct vfsoptlist *opts, const char *name, u_int *w, u_int val);
|
|
int vfs_getopt(struct vfsoptlist *, const char *, void **, int *);
|
|
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);
|
|
int vfs_scanopt(struct vfsoptlist *opts, const char *name, const char *fmt, ...);
|
|
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, struct mtx *, struct thread *);
|
|
int vfs_export /* process mount export info */
|
|
(struct mount *, struct export_args *);
|
|
int vfs_allocate_syncvnode(struct mount *);
|
|
void vfs_getnewfsid(struct mount *);
|
|
struct cdev *vfs_getrootfsid(struct mount *);
|
|
struct mount *vfs_getvfs(fsid_t *); /* return vfs given fsid */
|
|
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_ref(struct mount *);
|
|
void vfs_rel(struct mount *);
|
|
struct mount *vfs_mount_alloc(struct vnode *, struct vfsconf *, const char *,
|
|
struct thread *);
|
|
int vfs_suser(struct mount *, struct thread *);
|
|
void vfs_unbusy(struct mount *, struct thread *);
|
|
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_ */
|