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ufsmount.h

/*-
 * Copyright (c) 1982, 1986, 1989, 1993
 *    The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *    @(#)ufsmount.h    8.6 (Berkeley) 3/30/95
 * $FreeBSD: src/sys/ufs/ufs/ufsmount.h,v 1.37 2006/04/03 22:23:23 tegge Exp $
 */

#ifndef _UFS_UFS_UFSMOUNT_H_
#define _UFS_UFS_UFSMOUNT_H_

#include <sys/buf.h>    /* XXX For struct workhead. */

/*
 * Arguments to mount UFS-based filesystems
 */
struct ufs_args {
      char  *fspec;                 /* block special device to mount */
      struct      export_args export;     /* network export information */
};

#ifdef _KERNEL

#ifdef MALLOC_DECLARE
MALLOC_DECLARE(M_UFSMNT);
#endif

struct buf;
struct inode;
struct nameidata;
struct timeval;
struct ucred;
struct uio;
struct vnode;
struct ufs_extattr_per_mount;

/* This structure describes the UFS specific mount structure data. */
struct ufsmount {
      struct      mount *um_mountp;       /* filesystem vfs structure */
      struct cdev *um_dev;                /* device mounted */
      struct g_consumer *um_cp;
      struct bufobj *um_bo;               /* Buffer cache object */
      struct      vnode *um_devvp;        /* block device mounted vnode */
      u_long      um_fstype;              /* type of filesystem */
      struct      fs *um_fs;              /* pointer to superblock */
      struct      ufs_extattr_per_mount um_extattr;   /* extended attrs */
      u_long      um_nindir;              /* indirect ptrs per block */
      u_long      um_bptrtodb;                  /* indir ptr to disk block */
      u_long      um_seqinc;              /* inc between seq blocks */
      struct      mtx um_lock;                  /* Protects ufsmount & fs */
      long  um_numindirdeps;        /* outstanding indirdeps */
      struct workhead softdep_workitem_pending; /* softdep work queue */
      struct worklist *softdep_worklist_tail;   /* Tail pointer for above */
      int   softdep_on_worklist;          /* Items on the worklist */
      int   softdep_on_worklist_inprogress;     /* Busy items on worklist */
      int   softdep_deps;                 /* Total dependency count */
      int   softdep_accdeps;        /* accumulated dep count */
      int   softdep_req;                  /* Wakeup when deps hits 0. */
      struct      vnode *um_quotas[MAXQUOTAS];  /* pointer to quota files */
      struct      ucred *um_cred[MAXQUOTAS];    /* quota file access cred */
      time_t      um_btime[MAXQUOTAS];          /* block quota time limit */
      time_t      um_itime[MAXQUOTAS];          /* inode quota time limit */
      char  um_qflags[MAXQUOTAS];         /* quota specific flags */
      int64_t     um_savedmaxfilesize;          /* XXX - limit maxfilesize */
      int   (*um_balloc)(struct vnode *, off_t, int, struct ucred *, int, struct buf **);
      int   (*um_blkatoff)(struct vnode *, off_t, char **, struct buf **);
      int   (*um_truncate)(struct vnode *, off_t, int, struct ucred *, struct thread *);
      int   (*um_update)(struct vnode *, int);
      int   (*um_valloc)(struct vnode *, int, struct ucred *, struct vnode **);
      int   (*um_vfree)(struct vnode *, ino_t, int);
      void  (*um_ifree)(struct ufsmount *, struct inode *);
};

#define UFS_BALLOC(aa, bb, cc, dd, ee, ff) VFSTOUFS((aa)->v_mount)->um_balloc(aa, bb, cc, dd, ee, ff)
#define UFS_BLKATOFF(aa, bb, cc, dd) VFSTOUFS((aa)->v_mount)->um_blkatoff(aa, bb, cc, dd)
#define UFS_TRUNCATE(aa, bb, cc, dd, ee) VFSTOUFS((aa)->v_mount)->um_truncate(aa, bb, cc, dd, ee)
#define UFS_UPDATE(aa, bb) VFSTOUFS((aa)->v_mount)->um_update(aa, bb)
#define UFS_VALLOC(aa, bb, cc, dd) VFSTOUFS((aa)->v_mount)->um_valloc(aa, bb, cc, dd)
#define UFS_VFREE(aa, bb, cc) VFSTOUFS((aa)->v_mount)->um_vfree(aa, bb, cc)
#define UFS_IFREE(aa, bb) ((aa)->um_ifree(aa, bb))

#define     UFS_LOCK(aa)      mtx_lock(&(aa)->um_lock)
#define     UFS_UNLOCK(aa)    mtx_unlock(&(aa)->um_lock)
#define     UFS_MTX(aa) (&(aa)->um_lock)

/*
 * Filesystem types
 */
#define UFS1      1
#define UFS2      2

/*
 * Flags describing the state of quotas.
 */
#define     QTF_OPENING 0x01              /* Q_QUOTAON in progress */
#define     QTF_CLOSING 0x02              /* Q_QUOTAOFF in progress */

/* Convert mount ptr to ufsmount ptr. */
#define VFSTOUFS(mp)    ((struct ufsmount *)((mp)->mnt_data))
#define     UFSTOVFS(ump)     (ump)->um_mountp

/*
 * Macros to access filesystem parameters in the ufsmount structure.
 * Used by ufs_bmap.
 */
#define MNINDIR(ump)                ((ump)->um_nindir)
#define     blkptrtodb(ump, b)            ((b) << (ump)->um_bptrtodb)
#define     is_sequential(ump, a, b)      ((b) == (a) + ump->um_seqinc)
#endif /* _KERNEL */

#endif

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