The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/ufs/ufs/ufsmount.h

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    1 /*-
    2  * SPDX-License-Identifier: BSD-3-Clause
    3  *
    4  * Copyright (c) 1982, 1986, 1989, 1993
    5  *      The Regents of the University of California.  All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  * 3. Neither the name of the University nor the names of its contributors
   16  *    may be used to endorse or promote products derived from this software
   17  *    without specific prior written permission.
   18  *
   19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   29  * SUCH DAMAGE.
   30  *
   31  *      @(#)ufsmount.h  8.6 (Berkeley) 3/30/95
   32  * $FreeBSD$
   33  */
   34 
   35 #ifndef _UFS_UFS_UFSMOUNT_H_
   36 #define _UFS_UFS_UFSMOUNT_H_
   37 
   38 /*
   39  * Arguments to mount UFS-based filesystems
   40  */
   41 struct ufs_args {
   42         char    *fspec;                 /* block special device to mount */
   43         struct  oexport_args export;    /* network export information */
   44 };
   45 
   46 #include <sys/_task.h>
   47 
   48 #ifdef _KERNEL
   49 #ifdef MALLOC_DECLARE
   50 MALLOC_DECLARE(M_UFSMNT);
   51 MALLOC_DECLARE(M_TRIM);
   52 #endif
   53 #endif  /* _KERNEL */
   54 
   55 struct buf;
   56 struct inode;
   57 struct nameidata;
   58 struct taskqueue;
   59 struct timeval;
   60 struct ucred;
   61 struct uio;
   62 struct vnode;
   63 struct ufs_extattr_per_mount;
   64 struct jblocks;
   65 struct inodedep;
   66 
   67 TAILQ_HEAD(inodedeplst, inodedep);
   68 LIST_HEAD(bmsafemaphd, bmsafemap);
   69 LIST_HEAD(trimlist_hashhead, ffs_blkfree_trim_params);
   70 
   71 #include <sys/_lock.h>
   72 #include <sys/_mutex.h>
   73 #include <sys/_sx.h>
   74 
   75 /*
   76  * This structure describes the UFS specific mount structure data.
   77  * The function operators are used to support different versions of
   78  * UFS (UFS1, UFS2, etc).
   79  *
   80  * Lock reference:
   81  *      c - set at allocation then constant until freed
   82  *      i - ufsmount interlock (UFS_LOCK / UFS_UNLOCK)
   83  *      q - associated quota file is locked
   84  *      r - ref to parent mount structure is held (vfs_busy / vfs_unbusy)
   85  */
   86 struct ufsmount {
   87         struct  mount *um_mountp;               /* (r) filesystem vfs struct */
   88         struct  cdev *um_dev;                   /* (r) device mounted */
   89         struct  g_consumer *um_cp;              /* (r) GEOM access point */
   90         struct  bufobj *um_bo;                  /* (r) Buffer cache object */
   91         struct  vnode *um_odevvp;               /* (r) devfs dev vnode */
   92         struct  vnode *um_devvp;                /* (r) mntfs private vnode */
   93         u_long  um_fstype;                      /* (c) type of filesystem */
   94         struct  fs *um_fs;                      /* (r) pointer to superblock */
   95         struct  ufs_extattr_per_mount um_extattr; /* (c) extended attrs */
   96         u_long  um_nindir;                      /* (c) indirect ptrs per blk */
   97         u_long  um_bptrtodb;                    /* (c) indir disk block ptr */
   98         u_long  um_seqinc;                      /* (c) inc between seq blocks */
   99         u_long  um_bsize;                       /* (c) fs block size */
  100         uint64_t um_maxsymlinklen;              /* (c) max size of short
  101                                                        symlink */
  102         struct  mtx um_lock;                    /* (c) Protects ufsmount & fs */
  103         struct  sx um_checkpath_lock;           /* (c) Protects ufs_checkpath()
  104                                                        result */
  105         struct  mount_softdeps *um_softdep;     /* (c) softdep mgmt structure */
  106         struct  vnode *um_quotas[MAXQUOTAS];    /* (q) pointer to quota files */
  107         struct  ucred *um_cred[MAXQUOTAS];      /* (q) quota file access cred */
  108         time_t  um_btime[MAXQUOTAS];            /* (q) block quota time limit */
  109         time_t  um_itime[MAXQUOTAS];            /* (q) inode quota time limit */
  110         char    um_qflags[MAXQUOTAS];           /* (i) quota specific flags */
  111         int64_t um_savedmaxfilesize;            /* (c) track maxfilesize */
  112         u_int   um_flags;                       /* (i) filesystem flags */
  113         struct  timeval um_last_fullmsg;        /* (i) last full msg time */
  114         int     um_secs_fullmsg;                /* (i) seconds since full msg */
  115         struct  timeval um_last_integritymsg;   /* (i) last integrity msg */
  116         int     um_secs_integritymsg;           /* (i) secs since integ msg */
  117         u_int   um_trim_inflight;               /* (i) outstanding trim count */
  118         u_int   um_trim_inflight_blks;          /* (i) outstanding trim blks */
  119         u_long  um_trim_total;                  /* (i) total trim count */
  120         u_long  um_trim_total_blks;             /* (i) total trim block count */
  121         struct  taskqueue *um_trim_tq;          /* (c) trim request queue */
  122         struct  trimlist_hashhead *um_trimhash; /* (i) trimlist hash table */
  123         u_long  um_trimlisthashsize;            /* (i) trim hash table size-1 */
  124                                                 /* (c) - below function ptrs */
  125         int     (*um_balloc)(struct vnode *, off_t, int, struct ucred *,
  126                     int, struct buf **);
  127         int     (*um_blkatoff)(struct vnode *, off_t, char **, struct buf **);
  128         int     (*um_truncate)(struct vnode *, off_t, int, struct ucred *);
  129         int     (*um_update)(struct vnode *, int);
  130         int     (*um_valloc)(struct vnode *, int, struct ucred *,
  131                     struct vnode **);
  132         int     (*um_vfree)(struct vnode *, ino_t, int);
  133         void    (*um_ifree)(struct ufsmount *, struct inode *);
  134         int     (*um_rdonly)(struct inode *);
  135         void    (*um_snapgone)(struct inode *);
  136         int     (*um_check_blkno)(struct mount *, ino_t, daddr_t, int);
  137 };
  138 
  139 /*
  140  * filesystem flags
  141  */
  142 #define UM_CANDELETE            0x00000001      /* devvp supports TRIM */
  143 #define UM_WRITESUSPENDED       0x00000002      /* suspension in progress */
  144 #define UM_CANSPEEDUP           0x00000004      /* devvp supports SPEEDUP */
  145 #define UM_FSFAIL_CLEANUP       0x00000008      /* need cleanup after
  146                                                    unrecoverable error */
  147 /*
  148  * function prototypes
  149  */
  150 #define UFS_BALLOC(aa, bb, cc, dd, ee, ff) \
  151         VFSTOUFS((aa)->v_mount)->um_balloc(aa, bb, cc, dd, ee, ff)
  152 #define UFS_BLKATOFF(aa, bb, cc, dd) \
  153         VFSTOUFS((aa)->v_mount)->um_blkatoff(aa, bb, cc, dd)
  154 #define UFS_TRUNCATE(aa, bb, cc, dd) \
  155         VFSTOUFS((aa)->v_mount)->um_truncate(aa, bb, cc, dd)
  156 #define UFS_UPDATE(aa, bb) VFSTOUFS((aa)->v_mount)->um_update(aa, bb)
  157 #define UFS_VALLOC(aa, bb, cc, dd) \
  158         VFSTOUFS((aa)->v_mount)->um_valloc(aa, bb, cc, dd)
  159 #define UFS_VFREE(aa, bb, cc) VFSTOUFS((aa)->v_mount)->um_vfree(aa, bb, cc)
  160 #define UFS_IFREE(aa, bb) ((aa)->um_ifree(aa, bb))
  161 #define UFS_RDONLY(aa) (ITOUMP(aa)->um_rdonly(aa))
  162 #define UFS_SNAPGONE(aa) (ITOUMP(aa)->um_snapgone(aa))
  163 #define UFS_CHECK_BLKNO(aa, bb, cc, dd)                 \
  164         (VFSTOUFS(aa)->um_check_blkno == NULL ? 0 :     \
  165          VFSTOUFS(aa)->um_check_blkno(aa, bb, cc, dd))
  166 
  167 #define UFS_LOCK(aa)    mtx_lock(&(aa)->um_lock)
  168 #define UFS_UNLOCK(aa)  mtx_unlock(&(aa)->um_lock)
  169 #define UFS_MTX(aa)     (&(aa)->um_lock)
  170 
  171 /*
  172  * Filesystem types
  173  */
  174 #define UFS1    1
  175 #define UFS2    2
  176 
  177 /*
  178  * Flags describing the state of quotas.
  179  */
  180 #define QTF_OPENING     0x01                    /* Q_QUOTAON in progress */
  181 #define QTF_CLOSING     0x02                    /* Q_QUOTAOFF in progress */
  182 #define QTF_64BIT       0x04                    /* 64-bit quota file */
  183 
  184 /* Convert mount ptr to ufsmount ptr. */
  185 #define VFSTOUFS(mp)    ((struct ufsmount *)((mp)->mnt_data))
  186 #define UFSTOVFS(ump)   (ump)->um_mountp
  187 
  188 /*
  189  * Macros to access filesystem parameters in the ufsmount structure.
  190  * Used by ufs_bmap.
  191  */
  192 #define MNINDIR(ump)                    ((ump)->um_nindir)
  193 #define blkptrtodb(ump, b)              ((b) << (ump)->um_bptrtodb)
  194 #define is_sequential(ump, a, b)        ((b) == (a) + ump->um_seqinc)
  195 
  196 /* true if old FS format...*/
  197 #define OFSFMT(vp)      (VFSTOUFS((vp)->v_mount)->um_maxsymlinklen <= 0)
  198 
  199 #endif

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