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/ffs/ffs_extern.h

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    1 /*-
    2  * SPDX-License-Identifier: BSD-3-Clause
    3  *
    4  * Copyright (c) 1991, 1993, 1994
    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  *      @(#)ffs_extern.h        8.6 (Berkeley) 3/30/95
   32  * $FreeBSD$
   33  */
   34 
   35 #ifndef _UFS_FFS_EXTERN_H
   36 #define _UFS_FFS_EXTERN_H
   37 
   38 #ifndef _KERNEL
   39 #error "No user-serving parts inside"
   40 #else
   41 
   42 struct buf;
   43 struct cg;
   44 struct fid;
   45 struct fs;
   46 struct inode;
   47 struct malloc_type;
   48 struct mount;
   49 struct thread;
   50 struct sockaddr;
   51 struct statfs;
   52 struct ucred;
   53 struct vnode;
   54 struct vop_fsync_args;
   55 struct vop_reallocblks_args;
   56 struct workhead;
   57 
   58 int     ffs_alloc(struct inode *, ufs2_daddr_t, ufs2_daddr_t, int, int,
   59             struct ucred *, ufs2_daddr_t *);
   60 int     ffs_balloc_ufs1(struct vnode *a_vp, off_t a_startoffset, int a_size,
   61             struct ucred *a_cred, int a_flags, struct buf **a_bpp);
   62 int     ffs_balloc_ufs2(struct vnode *a_vp, off_t a_startoffset, int a_size,
   63             struct ucred *a_cred, int a_flags, struct buf **a_bpp);
   64 void    ffs_blkfree(struct ufsmount *, struct fs *, struct vnode *,
   65             ufs2_daddr_t, long, ino_t, enum vtype, struct workhead *, u_long);
   66 ufs2_daddr_t ffs_blkpref_ufs1(struct inode *, ufs_lbn_t, int, ufs1_daddr_t *);
   67 ufs2_daddr_t ffs_blkpref_ufs2(struct inode *, ufs_lbn_t, int, ufs2_daddr_t *);
   68 void    ffs_blkrelease_finish(struct ufsmount *, u_long);
   69 u_long  ffs_blkrelease_start(struct ufsmount *, struct vnode *, ino_t);
   70 uint32_t ffs_calc_sbhash(struct fs *);
   71 int     ffs_checkfreefile(struct fs *, struct vnode *, ino_t);
   72 void    ffs_clrblock(struct fs *, u_char *, ufs1_daddr_t);
   73 void    ffs_clusteracct(struct fs *, struct cg *, ufs1_daddr_t, int);
   74 void    ffs_bdflush(struct bufobj *, struct buf *);
   75 int     ffs_copyonwrite(struct vnode *, struct buf *);
   76 int     ffs_flushfiles(struct mount *, int, struct thread *);
   77 void    ffs_fragacct(struct fs *, int, int32_t [], int);
   78 int     ffs_freefile(struct ufsmount *, struct fs *, struct vnode *, ino_t,
   79             int, struct workhead *);
   80 void    ffs_fserr(struct fs *, ino_t, char *);
   81 int     ffs_getcg(struct fs *, struct vnode *, u_int, int, struct buf **,
   82             struct cg **);
   83 int     ffs_inotovp(struct mount *, ino_t, u_int64_t, int, struct vnode **,
   84             int);
   85 int     ffs_isblock(struct fs *, u_char *, ufs1_daddr_t);
   86 int     ffs_isfreeblock(struct fs *, u_char *, ufs1_daddr_t);
   87 void    ffs_oldfscompat_write(struct fs *, struct ufsmount *);
   88 int     ffs_own_mount(const struct mount *mp);
   89 int     ffs_sbsearch(void *, struct fs **, int, struct malloc_type *,
   90             int (*)(void *, off_t, void **, int));
   91 int     ffs_reallocblks(struct vop_reallocblks_args *);
   92 int     ffs_realloccg(struct inode *, ufs2_daddr_t, ufs2_daddr_t,
   93             ufs2_daddr_t, int, int, int, struct ucred *, struct buf **);
   94 int     ffs_reload(struct mount *, int);
   95 int     ffs_sbget(void *, struct fs **, off_t, int, struct malloc_type *,
   96             int (*)(void *, off_t, void **, int));
   97 int     ffs_sbput(void *, struct fs *, off_t, int (*)(void *, off_t, void *,
   98             int));
   99 int     ffs_sbupdate(struct ufsmount *, int, int);
  100 void    ffs_setblock(struct fs *, u_char *, ufs1_daddr_t);
  101 int     ffs_snapblkfree(struct fs *, struct vnode *, ufs2_daddr_t, long, ino_t,
  102             enum vtype, struct workhead *);
  103 void    ffs_snapremove(struct vnode *vp);
  104 int     ffs_snapshot(struct mount *mp, char *snapfile);
  105 void    ffs_snapshot_mount(struct mount *mp);
  106 void    ffs_snapshot_unmount(struct mount *mp);
  107 void    ffs_susp_initialize(void);
  108 void    ffs_susp_uninitialize(void);
  109 void    ffs_sync_snap(struct mount *, int);
  110 int     ffs_syncvnode(struct vnode *vp, int waitfor, int flags);
  111 int     ffs_truncate(struct vnode *, off_t, int, struct ucred *);
  112 int     ffs_update(struct vnode *, int);
  113 void    ffs_update_dinode_ckhash(struct fs *, struct ufs2_dinode *);
  114 int     ffs_verify_dinode_ckhash(struct fs *, struct ufs2_dinode *);
  115 int     ffs_valloc(struct vnode *, int, struct ucred *, struct vnode **);
  116 int     ffs_vfree(struct vnode *, ino_t, int);
  117 vfs_vget_t ffs_vget;
  118 int     ffs_vgetf(struct mount *, ino_t, int, struct vnode **, int);
  119 void    process_deferred_inactive(struct mount *mp);
  120 int     ffs_fsfail_cleanup(struct ufsmount *, int);
  121 int     ffs_fsfail_cleanup_locked(struct ufsmount *, int);
  122 int     ffs_breadz(struct ufsmount *, struct vnode *, daddr_t, daddr_t, int,
  123             daddr_t *, int *, int, struct ucred *, int, void (*)(struct buf *),
  124             struct buf **);
  125 
  126 /*
  127  * Flags to ffs_vgetf
  128  */
  129 #define FFSV_FORCEINSMQ         0x0001  /* Force insertion into mount list */
  130 #define FFSV_REPLACE            0x0002  /* Replace existing vnode */
  131 #define FFSV_REPLACE_DOOMED     0x0004  /* Replace existing vnode if it is
  132                                            doomed */
  133 #define FFSV_FORCEINODEDEP      0x0008  /* Force allocation of inodedep, ignore
  134                                            MNT_SOFTDEP */
  135 #define FFSV_NEWINODE           0x0010  /* Newly allocated inode */
  136 
  137 /*
  138  * Flags to ffs_reload
  139  */
  140 #define FFSR_FORCE      0x0001
  141 #define FFSR_UNSUSPEND  0x0002
  142 
  143 /*
  144  * Definitions for TRIM interface
  145  *
  146  * Special keys and recommended hash table size
  147  */
  148 #define NOTRIM_KEY      1       /* never written, so don't call trim for it */
  149 #define SINGLETON_KEY   2       /* only block being freed, so trim it now */
  150 #define FIRST_VALID_KEY 3       /* first valid key describing a block range */
  151 #define MAXTRIMIO       1024    /* maximum expected outstanding trim requests */
  152 
  153 extern struct vop_vector ffs_vnodeops1;
  154 extern struct vop_vector ffs_fifoops1;
  155 extern struct vop_vector ffs_vnodeops2;
  156 extern struct vop_vector ffs_fifoops2;
  157 
  158 /*
  159  * Soft update function prototypes.
  160  */
  161 
  162 int     softdep_check_suspend(struct mount *, struct vnode *,
  163           int, int, int, int);
  164 void    softdep_get_depcounts(struct mount *, int *, int *);
  165 void    softdep_initialize(void);
  166 void    softdep_uninitialize(void);
  167 int     softdep_mount(struct vnode *, struct mount *, struct fs *,
  168             struct ucred *);
  169 void    softdep_unmount(struct mount *);
  170 void    softdep_handle_error(struct buf *);
  171 int     softdep_move_dependencies(struct buf *, struct buf *);
  172 int     softdep_flushworklist(struct mount *, int *, struct thread *);
  173 int     softdep_flushfiles(struct mount *, int, struct thread *);
  174 void    softdep_update_inodeblock(struct inode *, struct buf *, int);
  175 void    softdep_load_inodeblock(struct inode *);
  176 void    softdep_freefile(struct vnode *, ino_t, int);
  177 int     softdep_request_cleanup(struct fs *, struct vnode *,
  178             struct ucred *, int);
  179 int     softdep_prerename(struct vnode *, struct vnode *, struct vnode *,
  180             struct vnode *);
  181 int     softdep_prelink(struct vnode *, struct vnode *,
  182             struct componentname *);
  183 void    softdep_setup_freeblocks(struct inode *, off_t, int);
  184 void    softdep_setup_inomapdep(struct buf *, struct inode *, ino_t, int);
  185 void    softdep_setup_blkmapdep(struct buf *, struct mount *, ufs2_daddr_t,
  186             int, int);
  187 void    softdep_setup_allocdirect(struct inode *, ufs_lbn_t, ufs2_daddr_t,
  188             ufs2_daddr_t, long, long, struct buf *);
  189 void    softdep_setup_allocext(struct inode *, ufs_lbn_t, ufs2_daddr_t,
  190             ufs2_daddr_t, long, long, struct buf *);
  191 void    softdep_setup_allocindir_meta(struct buf *, struct inode *,
  192             struct buf *, int, ufs2_daddr_t);
  193 void    softdep_setup_allocindir_page(struct inode *, ufs_lbn_t,
  194             struct buf *, int, ufs2_daddr_t, ufs2_daddr_t, struct buf *);
  195 void    softdep_setup_blkfree(struct mount *, struct buf *, ufs2_daddr_t, int,
  196             struct workhead *);
  197 void    softdep_setup_inofree(struct mount *, struct buf *, ino_t,
  198             struct workhead *);
  199 void    softdep_setup_sbupdate(struct ufsmount *, struct fs *, struct buf *);
  200 void    softdep_fsync_mountdev(struct vnode *);
  201 int     softdep_sync_metadata(struct vnode *);
  202 int     softdep_sync_buf(struct vnode *, struct buf *, int);
  203 int     softdep_fsync(struct vnode *);
  204 int     softdep_prealloc(struct vnode *, int);
  205 int     softdep_journal_lookup(struct mount *, struct vnode **);
  206 void    softdep_journal_freeblocks(struct inode *, struct ucred *, off_t, int);
  207 void    softdep_journal_fsync(struct inode *);
  208 void    softdep_buf_append(struct buf *, struct workhead *);
  209 void    softdep_inode_append(struct inode *, struct ucred *, struct workhead *);
  210 void    softdep_freework(struct workhead *);
  211 
  212 /*
  213  * Things to request flushing in softdep_request_cleanup()
  214  */
  215 #define FLUSH_INODES            1
  216 #define FLUSH_INODES_WAIT       2
  217 #define FLUSH_BLOCKS            3
  218 #define FLUSH_BLOCKS_WAIT       4
  219 /*
  220  * Flag to ffs_syncvnode() to request flushing of data only,
  221  * but skip the ffs_update() on the inode itself. Used to avoid
  222  * deadlock when flushing snapshot inodes while holding snaplk.
  223  */
  224 #define NO_INO_UPDT             0x00000001
  225 /*
  226  * Request data sync only from ffs_syncvnode(), not touching even more
  227  * metadata than NO_INO_UPDT.
  228  */
  229 #define DATA_ONLY               0x00000002
  230 
  231 int     ffs_rdonly(struct inode *);
  232 
  233 TAILQ_HEAD(snaphead, inode);
  234 
  235 struct snapdata {
  236         LIST_ENTRY(snapdata) sn_link;
  237         struct snaphead sn_head;
  238         daddr_t sn_listsize;
  239         daddr_t *sn_blklist;
  240         struct lock sn_lock;
  241 };
  242 
  243 #endif /* _KERNEL */
  244 
  245 #endif /* !_UFS_FFS_EXTERN_H */

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