1142 lines
42 KiB
C
1142 lines
42 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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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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* 3. 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/tslog.h>
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#include <sys/_mutex.h>
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#include <sys/_sx.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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#define fsidcmp(a, b) memcmp((a), (b), sizeof(fsid_t))
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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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* Note that the offset of fid_data is 4 bytes, so care must be taken to avoid
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* undefined behavior accessing unaligned fields within an embedded struct.
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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 1024 /* size of on/from name bufs */
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#define STATFS_VERSION 0x20140518 /* 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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#if defined(_WANT_FREEBSD11_STATFS) || defined(_KERNEL)
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#define FREEBSD11_STATFS_VERSION 0x20030518 /* current version number */
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struct freebsd11_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[16]; /* filesystem type name */
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char f_mntfromname[88]; /* mounted filesystem */
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char f_mntonname[88]; /* directory on which mounted */
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};
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#endif /* _WANT_FREEBSD11_STATFS || _KERNEL */
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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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* l - mnt_listmtx
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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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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 mtx mnt_listmtx;
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struct vnodelst mnt_lazyvnodelist; /* (l) list of lazy vnodes */
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int mnt_lazyvnodelistsize; /* (l) # of lazy vnodes */
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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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int __aligned(CACHE_LINE_SIZE) mnt_vfs_ops;/* (i) pending vfs ops */
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int *mnt_thread_in_ops_pcpu;
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int *mnt_ref_pcpu;
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int *mnt_lockref_pcpu;
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int *mnt_writeopcount_pcpu;
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struct vnode *mnt_rootvnode;
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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_LAZY.
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*/
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typedef int mnt_lazy_cb_t(struct vnode *, void *);
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struct vnode *__mnt_vnode_next_lazy(struct vnode **mvp, struct mount *mp,
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mnt_lazy_cb_t *cb, void *cbarg);
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struct vnode *__mnt_vnode_first_lazy(struct vnode **mvp, struct mount *mp,
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mnt_lazy_cb_t *cb, void *cbarg);
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void __mnt_vnode_markerfree_lazy(struct vnode **mvp, struct mount *mp);
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#define MNT_VNODE_FOREACH_LAZY(vp, mp, mvp, cb, cbarg) \
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for (vp = __mnt_vnode_first_lazy(&(mvp), (mp), (cb), (cbarg)); \
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(vp) != NULL; \
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vp = __mnt_vnode_next_lazy(&(mvp), (mp), (cb), (cbarg)))
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#define MNT_VNODE_FOREACH_LAZY_ABORT(mp, mvp) \
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__mnt_vnode_markerfree_lazy(&(mvp), (mp))
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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) do { \
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mtx_assert(MNT_MTX(mp), MA_OWNED); \
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mp->mnt_ref++; \
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} while (0)
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#define MNT_REL(mp) do { \
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mtx_assert(MNT_MTX(mp), MA_OWNED); \
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(mp)->mnt_ref--; \
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if ((mp)->mnt_vfs_ops && (mp)->mnt_ref < 0) \
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vfs_dump_mount_counters(mp); \
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if ((mp)->mnt_ref == 0 && (mp)->mnt_vfs_ops) \
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wakeup((mp)); \
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} while (0)
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#endif /* _KERNEL */
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#if defined(_WANT_MNTOPTNAMES) || defined(_KERNEL)
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struct mntoptnames {
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uint64_t o_opt;
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const char *o_name;
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};
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#define MNTOPT_NAMES \
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{ MNT_ASYNC, "asynchronous" }, \
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{ MNT_EXPORTED, "NFS exported" }, \
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{ MNT_LOCAL, "local" }, \
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{ MNT_NOATIME, "noatime" }, \
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{ MNT_NOEXEC, "noexec" }, \
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{ MNT_NOSUID, "nosuid" }, \
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{ MNT_NOSYMFOLLOW, "nosymfollow" }, \
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{ MNT_QUOTA, "with quotas" }, \
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{ MNT_RDONLY, "read-only" }, \
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{ MNT_SYNCHRONOUS, "synchronous" }, \
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{ MNT_UNION, "union" }, \
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{ MNT_NOCLUSTERR, "noclusterr" }, \
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{ MNT_NOCLUSTERW, "noclusterw" }, \
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{ MNT_SUIDDIR, "suiddir" }, \
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{ MNT_SOFTDEP, "soft-updates" }, \
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{ MNT_SUJ, "journaled soft-updates" }, \
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{ MNT_MULTILABEL, "multilabel" }, \
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{ MNT_ACLS, "acls" }, \
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{ MNT_NFS4ACLS, "nfsv4acls" }, \
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{ MNT_GJOURNAL, "gjournal" }, \
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{ MNT_AUTOMOUNTED, "automounted" }, \
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{ MNT_VERIFIED, "verified" }, \
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{ MNT_UNTRUSTED, "untrusted" }, \
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{ MNT_NOCOVER, "nocover" }, \
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{ MNT_EMPTYDIR, "emptydir" }, \
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{ MNT_UPDATE, "update" }, \
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{ MNT_DELEXPORT, "delexport" }, \
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{ MNT_RELOAD, "reload" }, \
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{ MNT_FORCE, "force" }, \
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{ MNT_SNAPSHOT, "snapshot" }, \
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{ 0, NULL }
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#endif
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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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#define MNT_AUTOMOUNTED 0x0000000200000000ULL /* mounted by automountd(8) */
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#define MNT_UNTRUSTED 0x0000000800000000ULL /* filesys metadata untrusted */
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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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#define MNT_EXTLS 0x0000004000000000ULL /* require TLS */
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#define MNT_EXTLSCERT 0x0000008000000000ULL /* require TLS with client cert */
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#define MNT_EXTLSCERTUSER 0x0000010000000000ULL /* require TLS with user cert */
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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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#define MNT_VERIFIED 0x0000000400000000ULL /* filesystem is verified */
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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 | \
|
|
MNT_IGNORE | MNT_EXPUBLIC | MNT_NOSYMFOLLOW | \
|
|
MNT_GJOURNAL | MNT_MULTILABEL | MNT_ACLS | \
|
|
MNT_NFS4ACLS | MNT_AUTOMOUNTED | MNT_VERIFIED | \
|
|
MNT_UNTRUSTED)
|
|
|
|
/* Mask of flags that can be updated. */
|
|
#define MNT_UPDATEMASK (MNT_NOSUID | MNT_NOEXEC | \
|
|
MNT_SYNCHRONOUS | MNT_UNION | MNT_ASYNC | \
|
|
MNT_NOATIME | \
|
|
MNT_NOSYMFOLLOW | MNT_IGNORE | \
|
|
MNT_NOCLUSTERR | MNT_NOCLUSTERW | MNT_SUIDDIR | \
|
|
MNT_ACLS | MNT_USER | MNT_NFS4ACLS | \
|
|
MNT_AUTOMOUNTED | MNT_UNTRUSTED)
|
|
|
|
/*
|
|
* External filesystem command modifier flags.
|
|
* Unmount can use the MNT_FORCE flag.
|
|
* XXX: These are not STATES and really should be somewhere else.
|
|
* XXX: MNT_BYFSID and MNT_NONBUSY collide with MNT_ACLS and MNT_MULTILABEL,
|
|
* but because MNT_ACLS and MNT_MULTILABEL are only used for mount(2),
|
|
* and MNT_BYFSID and MNT_NONBUSY are only used for unmount(2),
|
|
* it's harmless.
|
|
*/
|
|
#define MNT_UPDATE 0x0000000000010000ULL /* not real mount, just update */
|
|
#define MNT_DELEXPORT 0x0000000000020000ULL /* delete export host lists */
|
|
#define MNT_RELOAD 0x0000000000040000ULL /* reload filesystem data */
|
|
#define MNT_FORCE 0x0000000000080000ULL /* force unmount or readonly */
|
|
#define MNT_SNAPSHOT 0x0000000001000000ULL /* snapshot the filesystem */
|
|
#define MNT_NONBUSY 0x0000000004000000ULL /* check vnode use counts. */
|
|
#define MNT_BYFSID 0x0000000008000000ULL /* specify filesystem by ID. */
|
|
#define MNT_NOCOVER 0x0000001000000000ULL /* Do not cover a mount point */
|
|
#define MNT_EMPTYDIR 0x0000002000000000ULL /* Only mount on empty dir */
|
|
#define MNT_CMDFLAGS (MNT_UPDATE | MNT_DELEXPORT | MNT_RELOAD | \
|
|
MNT_FORCE | MNT_SNAPSHOT | MNT_NONBUSY | \
|
|
MNT_BYFSID | MNT_NOCOVER | MNT_EMPTYDIR)
|
|
/*
|
|
* Internal filesystem control flags stored in mnt_kern_flag.
|
|
*
|
|
* MNTK_UNMOUNT locks the mount entry so that name lookup cannot
|
|
* proceed past the mount point. This keeps the subtree stable during
|
|
* mounts and unmounts. When non-forced unmount flushes all vnodes
|
|
* from the mp queue, the MNTK_UNMOUNT flag prevents insmntque() from
|
|
* queueing new vnodes.
|
|
*
|
|
* MNTK_UNMOUNTF permits filesystems to detect a forced unmount while
|
|
* dounmount() is still waiting to lock the mountpoint. This allows
|
|
* the filesystem to cancel operations that might otherwise deadlock
|
|
* with the unmount attempt (used by NFS).
|
|
*/
|
|
#define MNTK_UNMOUNTF 0x00000001 /* forced unmount in progress */
|
|
#define MNTK_ASYNC 0x00000002 /* filtered async flag */
|
|
#define MNTK_SOFTDEP 0x00000004 /* async disabled by softdep */
|
|
#define MNTK_NOMSYNC 0x00000008 /* don't do msync */
|
|
#define MNTK_DRAINING 0x00000010 /* lock draining is happening */
|
|
#define MNTK_REFEXPIRE 0x00000020 /* refcount expiring is happening */
|
|
#define MNTK_EXTENDED_SHARED 0x00000040 /* Allow shared locking for more ops */
|
|
#define MNTK_SHARED_WRITES 0x00000080 /* Allow shared locking for writes */
|
|
#define MNTK_NO_IOPF 0x00000100 /* Disallow page faults during reads
|
|
and writes. Filesystem shall properly
|
|
handle i/o state on EFAULT. */
|
|
#define MNTK_VGONE_UPPER 0x00000200
|
|
#define MNTK_VGONE_WAITER 0x00000400
|
|
#define MNTK_LOOKUP_EXCL_DOTDOT 0x00000800
|
|
#define MNTK_MARKER 0x00001000
|
|
#define MNTK_UNMAPPED_BUFS 0x00002000
|
|
#define MNTK_USES_BCACHE 0x00004000 /* FS uses the buffer cache. */
|
|
#define MNTK_TEXT_REFS 0x00008000 /* Keep use ref for text */
|
|
#define MNTK_VMSETSIZE_BUG 0x00010000
|
|
#define MNTK_UNIONFS 0x00020000 /* A hack for F_ISUNIONSTACK */
|
|
#define MNTK_FPLOOKUP 0x00040000 /* fast path lookup is supported */
|
|
#define MNTK_NOASYNC 0x00800000 /* disable async */
|
|
#define MNTK_UNMOUNT 0x01000000 /* unmount in progress */
|
|
#define MNTK_MWAIT 0x02000000 /* waiting for unmount to finish */
|
|
#define MNTK_SUSPEND 0x08000000 /* request write suspension */
|
|
#define MNTK_SUSPEND2 0x04000000 /* block secondary writes */
|
|
#define MNTK_SUSPENDED 0x10000000 /* write operations are suspended */
|
|
#define MNTK_NULL_NOCACHE 0x20000000 /* auto disable cache for nullfs
|
|
mounts over this fs */
|
|
#define MNTK_LOOKUP_SHARED 0x40000000 /* FS supports shared lock lookups */
|
|
#define MNTK_NOKNOTE 0x80000000 /* Don't send KNOTEs from VOP hooks */
|
|
|
|
#ifdef _KERNEL
|
|
static inline int
|
|
MNT_SHARED_WRITES(struct mount *mp)
|
|
{
|
|
|
|
return (mp != NULL && (mp->mnt_kern_flag & MNTK_SHARED_WRITES) != 0);
|
|
}
|
|
|
|
static inline int
|
|
MNT_EXTENDED_SHARED(struct mount *mp)
|
|
{
|
|
|
|
return (mp != NULL && (mp->mnt_kern_flag & MNTK_EXTENDED_SHARED) != 0);
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* 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 */
|
|
};
|
|
|
|
/*
|
|
* Not quite so old export arguments with 32bit ex_flags and xucred ex_anon.
|
|
*/
|
|
#define MAXSECFLAVORS 5
|
|
struct o2export_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 */
|
|
};
|
|
|
|
/*
|
|
* Export arguments for local filesystem mount calls.
|
|
*/
|
|
struct export_args {
|
|
uint64_t ex_flags; /* export related flags */
|
|
uid_t ex_root; /* mapping for root uid */
|
|
uid_t ex_uid; /* mapping for anonymous user */
|
|
int ex_ngroups;
|
|
gid_t *ex_groups;
|
|
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 */
|
|
struct vfsops *vfc_vfsops_sd; /* ... signal-deferred */
|
|
int vfc_typenum; /* historic filesystem type number */
|
|
int vfc_refcount; /* number mounted of this type */
|
|
int vfc_flags; /* permanent flags */
|
|
int vfc_prison_flag; /* prison allow.mount.* flag */
|
|
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 */
|
|
#define VFCF_SBDRY 0x01000000 /* Stop at Boundary: defer stop requests
|
|
to kernel->user (AST) transition */
|
|
|
|
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);
|
|
MALLOC_DECLARE(M_STATFS);
|
|
#endif
|
|
extern int maxvfsconf; /* highest defined filesystem type */
|
|
|
|
TAILQ_HEAD(vfsconfhead, vfsconf);
|
|
extern struct vfsconfhead vfsconf;
|
|
|
|
/*
|
|
* Operations supported on mounted filesystem.
|
|
*/
|
|
struct mount_args;
|
|
struct nameidata;
|
|
struct sysctl_req;
|
|
struct mntarg;
|
|
|
|
/*
|
|
* N.B., vfs_cmount is the ancient vfsop invoked by the old mount(2) syscall.
|
|
* The new way is vfs_mount.
|
|
*
|
|
* vfs_cmount implementations typically translate arguments from their
|
|
* respective old per-FS structures into the key-value list supported by
|
|
* nmount(2), then use kernel_mount(9) to mimic nmount(2) from kernelspace.
|
|
*
|
|
* Filesystems with mounters that use nmount(2) do not need to and should not
|
|
* implement vfs_cmount. Hopefully a future cleanup can remove vfs_cmount and
|
|
* mount(2) entirely.
|
|
*/
|
|
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,
|
|
uint64_t *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_notify_lowervp_t(struct mount *mp, struct vnode *lowervp);
|
|
typedef void vfs_purge_t(struct mount *mp);
|
|
|
|
struct vfsops {
|
|
vfs_mount_t *vfs_mount;
|
|
vfs_cmount_t *vfs_cmount;
|
|
vfs_unmount_t *vfs_unmount;
|
|
vfs_root_t *vfs_root;
|
|
vfs_root_t *vfs_cachedroot;
|
|
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_notify_lowervp_t *vfs_reclaim_lowervp;
|
|
vfs_notify_lowervp_t *vfs_unlink_lowervp;
|
|
vfs_purge_t *vfs_purge;
|
|
vfs_mount_t *vfs_spare[6]; /* spares for ABI compat */
|
|
};
|
|
|
|
vfs_statfs_t __vfs_statfs;
|
|
|
|
#define VFS_MOUNT(MP) ({ \
|
|
int _rc; \
|
|
\
|
|
TSRAW(curthread, TS_ENTER, "VFS_MOUNT", (MP)->mnt_vfc->vfc_name);\
|
|
_rc = (*(MP)->mnt_op->vfs_mount)(MP); \
|
|
TSRAW(curthread, TS_EXIT, "VFS_MOUNT", (MP)->mnt_vfc->vfc_name);\
|
|
_rc; })
|
|
|
|
#define VFS_UNMOUNT(MP, FORCE) ({ \
|
|
int _rc; \
|
|
\
|
|
_rc = (*(MP)->mnt_op->vfs_unmount)(MP, FORCE); \
|
|
_rc; })
|
|
|
|
#define VFS_ROOT(MP, FLAGS, VPP) ({ \
|
|
int _rc; \
|
|
\
|
|
_rc = (*(MP)->mnt_op->vfs_root)(MP, FLAGS, VPP); \
|
|
_rc; })
|
|
|
|
#define VFS_CACHEDROOT(MP, FLAGS, VPP) ({ \
|
|
int _rc; \
|
|
\
|
|
_rc = (*(MP)->mnt_op->vfs_cachedroot)(MP, FLAGS, VPP); \
|
|
_rc; })
|
|
|
|
#define VFS_QUOTACTL(MP, C, U, A) ({ \
|
|
int _rc; \
|
|
\
|
|
_rc = (*(MP)->mnt_op->vfs_quotactl)(MP, C, U, A); \
|
|
_rc; })
|
|
|
|
#define VFS_STATFS(MP, SBP) ({ \
|
|
int _rc; \
|
|
\
|
|
_rc = __vfs_statfs((MP), (SBP)); \
|
|
_rc; })
|
|
|
|
#define VFS_SYNC(MP, WAIT) ({ \
|
|
int _rc; \
|
|
\
|
|
_rc = (*(MP)->mnt_op->vfs_sync)(MP, WAIT); \
|
|
_rc; })
|
|
|
|
#define VFS_VGET(MP, INO, FLAGS, VPP) ({ \
|
|
int _rc; \
|
|
\
|
|
_rc = (*(MP)->mnt_op->vfs_vget)(MP, INO, FLAGS, VPP); \
|
|
_rc; })
|
|
|
|
#define VFS_FHTOVP(MP, FIDP, FLAGS, VPP) ({ \
|
|
int _rc; \
|
|
\
|
|
_rc = (*(MP)->mnt_op->vfs_fhtovp)(MP, FIDP, FLAGS, VPP); \
|
|
_rc; })
|
|
|
|
#define VFS_CHECKEXP(MP, NAM, EXFLG, CRED, NUMSEC, SEC) ({ \
|
|
int _rc; \
|
|
\
|
|
_rc = (*(MP)->mnt_op->vfs_checkexp)(MP, NAM, EXFLG, CRED, NUMSEC,\
|
|
SEC); \
|
|
_rc; })
|
|
|
|
#define VFS_EXTATTRCTL(MP, C, FN, NS, N) ({ \
|
|
int _rc; \
|
|
\
|
|
_rc = (*(MP)->mnt_op->vfs_extattrctl)(MP, C, FN, NS, N); \
|
|
_rc; })
|
|
|
|
#define VFS_SYSCTL(MP, OP, REQ) ({ \
|
|
int _rc; \
|
|
\
|
|
_rc = (*(MP)->mnt_op->vfs_sysctl)(MP, OP, REQ); \
|
|
_rc; })
|
|
|
|
#define VFS_SUSP_CLEAN(MP) do { \
|
|
if (*(MP)->mnt_op->vfs_susp_clean != NULL) { \
|
|
(*(MP)->mnt_op->vfs_susp_clean)(MP); \
|
|
} \
|
|
} while (0)
|
|
|
|
#define VFS_RECLAIM_LOWERVP(MP, VP) do { \
|
|
if (*(MP)->mnt_op->vfs_reclaim_lowervp != NULL) { \
|
|
(*(MP)->mnt_op->vfs_reclaim_lowervp)((MP), (VP)); \
|
|
} \
|
|
} while (0)
|
|
|
|
#define VFS_UNLINK_LOWERVP(MP, VP) do { \
|
|
if (*(MP)->mnt_op->vfs_unlink_lowervp != NULL) { \
|
|
(*(MP)->mnt_op->vfs_unlink_lowervp)((MP), (VP)); \
|
|
} \
|
|
} while (0)
|
|
|
|
#define VFS_PURGE(MP) do { \
|
|
if (*(MP)->mnt_op->vfs_purge != NULL) { \
|
|
(*(MP)->mnt_op->vfs_purge)(MP); \
|
|
} \
|
|
} while (0)
|
|
|
|
#define VFS_KNOTE_LOCKED(vp, hint) do \
|
|
{ \
|
|
if (((vp)->v_vflag & VV_NOKNOTE) == 0) \
|
|
VN_KNOTE((vp), (hint), KNF_LISTLOCKED); \
|
|
} while (0)
|
|
|
|
#define VFS_KNOTE_UNLOCKED(vp, hint) do \
|
|
{ \
|
|
if (((vp)->v_vflag & VV_NOKNOTE) == 0) \
|
|
VN_KNOTE((vp), (hint), 0); \
|
|
} while (0)
|
|
|
|
#define VFS_NOTIFY_UPPER_RECLAIM 1
|
|
#define VFS_NOTIFY_UPPER_UNLINK 2
|
|
|
|
#include <sys/module.h>
|
|
|
|
/*
|
|
* Version numbers.
|
|
*/
|
|
#define VFS_VERSION_00 0x19660120
|
|
#define VFS_VERSION_01 0x20121030
|
|
#define VFS_VERSION_02 0x20180504
|
|
#define VFS_VERSION VFS_VERSION_02
|
|
|
|
#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)
|
|
|
|
/*
|
|
* 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_periodic(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_notify_upper(struct vnode *, int);
|
|
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_padalign mountlist_mtx;
|
|
extern struct nfs_public nfs_pub;
|
|
extern struct sx vfsconf_sx;
|
|
#define vfsconf_lock() sx_xlock(&vfsconf_sx)
|
|
#define vfsconf_unlock() sx_xunlock(&vfsconf_sx)
|
|
#define vfsconf_slock() sx_slock(&vfsconf_sx)
|
|
#define vfsconf_sunlock() sx_sunlock(&vfsconf_sx)
|
|
struct vnode *mntfs_allocvp(struct mount *, struct vnode *);
|
|
void mntfs_freevp(struct vnode *);
|
|
|
|
/*
|
|
* Declarations for these vfs default operations are located in
|
|
* kern/vfs_default.c. They will be automatically used to replace
|
|
* null entries in VFS ops tables when registering a new filesystem
|
|
* type in the global table.
|
|
*/
|
|
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;
|
|
|
|
void syncer_suspend(void);
|
|
void syncer_resume(void);
|
|
|
|
struct vnode *vfs_cache_root_clear(struct mount *);
|
|
void vfs_cache_root_set(struct mount *, struct vnode *);
|
|
|
|
void vfs_op_barrier_wait(struct mount *);
|
|
void vfs_op_enter(struct mount *);
|
|
void vfs_op_exit_locked(struct mount *);
|
|
void vfs_op_exit(struct mount *);
|
|
|
|
#ifdef DIAGNOSTIC
|
|
void vfs_assert_mount_counters(struct mount *);
|
|
void vfs_dump_mount_counters(struct mount *);
|
|
#else
|
|
#define vfs_assert_mount_counters(mp) do { } while (0)
|
|
#define vfs_dump_mount_counters(mp) do { } while (0)
|
|
#endif
|
|
|
|
enum mount_counter { MNT_COUNT_REF, MNT_COUNT_LOCKREF, MNT_COUNT_WRITEOPCOUNT };
|
|
int vfs_mount_fetch_counter(struct mount *, enum mount_counter);
|
|
|
|
/*
|
|
* Code transitioning mnt_vfs_ops to > 0 issues IPIs until it observes
|
|
* all CPUs not executing code enclosed by mnt_thread_in_ops_pcpu.
|
|
*
|
|
* This provides an invariant that by the time the last CPU is observed not
|
|
* executing, everyone else entering will see the counter > 0 and exit.
|
|
*
|
|
* Note there is no barrier between vfs_ops and the rest of the code in the
|
|
* section. It is not necessary as the writer has to wait for everyone to drain
|
|
* before making any changes or only make changes safe while the section is
|
|
* executed.
|
|
*/
|
|
#define vfs_op_thread_entered(mp) ({ \
|
|
MPASS(curthread->td_critnest > 0); \
|
|
*zpcpu_get(mp->mnt_thread_in_ops_pcpu) == 1; \
|
|
})
|
|
|
|
#define vfs_op_thread_enter_crit(mp) ({ \
|
|
bool _retval_crit = true; \
|
|
MPASS(curthread->td_critnest > 0); \
|
|
MPASS(!vfs_op_thread_entered(mp)); \
|
|
zpcpu_set_protected(mp->mnt_thread_in_ops_pcpu, 1); \
|
|
__compiler_membar(); \
|
|
if (__predict_false(mp->mnt_vfs_ops > 0)) { \
|
|
vfs_op_thread_exit_crit(mp); \
|
|
_retval_crit = false; \
|
|
} \
|
|
_retval_crit; \
|
|
})
|
|
|
|
#define vfs_op_thread_enter(mp) ({ \
|
|
bool _retval; \
|
|
critical_enter(); \
|
|
_retval = vfs_op_thread_enter_crit(mp); \
|
|
if (__predict_false(!_retval)) \
|
|
critical_exit(); \
|
|
_retval; \
|
|
})
|
|
|
|
#define vfs_op_thread_exit_crit(mp) do { \
|
|
MPASS(vfs_op_thread_entered(mp)); \
|
|
__compiler_membar(); \
|
|
zpcpu_set_protected(mp->mnt_thread_in_ops_pcpu, 0); \
|
|
} while (0)
|
|
|
|
#define vfs_op_thread_exit(mp) do { \
|
|
vfs_op_thread_exit_crit(mp); \
|
|
critical_exit(); \
|
|
} while (0)
|
|
|
|
#define vfs_mp_count_add_pcpu(mp, count, val) do { \
|
|
MPASS(vfs_op_thread_entered(mp)); \
|
|
zpcpu_add_protected(mp->mnt_##count##_pcpu, val); \
|
|
} while (0)
|
|
|
|
#define vfs_mp_count_sub_pcpu(mp, count, val) do { \
|
|
MPASS(vfs_op_thread_entered(mp)); \
|
|
zpcpu_sub_protected(mp->mnt_##count##_pcpu, val); \
|
|
} while (0)
|
|
|
|
#else /* !_KERNEL */
|
|
|
|
#include <sys/cdefs.h>
|
|
|
|
struct stat;
|
|
|
|
__BEGIN_DECLS
|
|
int fhlink(struct fhandle *, const char *);
|
|
int fhlinkat(struct fhandle *, int, const char *);
|
|
int fhopen(const struct fhandle *, int);
|
|
int fhreadlink(struct fhandle *, char *, size_t);
|
|
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 getfhat(int, char *, struct fhandle *, int);
|
|
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_ */
|