include/xfs_mount.h

   1 /*
   2  * Copyright (c) 2000-2002 Silicon Graphics, Inc.  All Rights Reserved.
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms of version 2 of the GNU General Public License as
   6  * published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it would be useful, but
   9  * WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  11  *
  12  * Further, this software is distributed without any warranty that it is
  13  * free of the rightful claim of any third person regarding infringement
  14  * or the like.  Any license provided herein, whether implied or
  15  * otherwise, applies only to this software file.  Patent licenses, if
  16  * any, provided herein do not apply to combinations of this program with
  17  * other software, or any other product whatsoever.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, write the Free Software Foundation, Inc., 59
  21  * Temple Place - Suite 330, Boston MA 02111-1307, USA.
  22  *
  23  * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
  24  * Mountain View, CA  94043, or:
  25  *
  26  * http://www.sgi.com
  27  *
  28  * For further information regarding this notice, see:
  29  *
  30  * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
  31  */
  32 #ifndef __XFS_MOUNT_H__
  33 #define __XFS_MOUNT_H__
  34
  35
  36 typedef struct xfs_trans_reservations {
  37         uint    tr_write;       /* extent alloc trans */
  38         uint    tr_itruncate;   /* truncate trans */
  39         uint    tr_rename;      /* rename trans */
  40         uint    tr_link;        /* link trans */
  41         uint    tr_remove;      /* unlink trans */
  42         uint    tr_symlink;     /* symlink trans */
  43         uint    tr_create;      /* create trans */
  44         uint    tr_mkdir;       /* mkdir trans */
  45         uint    tr_ifree;       /* inode free trans */
  46         uint    tr_ichange;     /* inode update trans */
  47         uint    tr_growdata;    /* fs data section grow trans */
  48         uint    tr_swrite;      /* sync write inode trans */
  49         uint    tr_addafork;    /* cvt inode to attributed trans */
  50         uint    tr_writeid;     /* write setuid/setgid file */
  51         uint    tr_attrinval;   /* attr fork buffer invalidation */
  52         uint    tr_attrset;     /* set/create an attribute */
  53         uint    tr_attrrm;      /* remove an attribute */
  54         uint    tr_clearagi;    /* clear bad agi unlinked ino bucket */
  55         uint    tr_growrtalloc; /* grow realtime allocations */
  56         uint    tr_growrtzero;  /* grow realtime zeroing */
  57         uint    tr_growrtfree;  /* grow realtime freeing */
  58 } xfs_trans_reservations_t;
  59
  60
  61 #ifndef __KERNEL__
  62 /*
  63  * Moved here from xfs_ag.h to avoid reordering header files
  64  */
  65 #define XFS_DADDR_TO_AGNO(mp,d) \
  66         ((xfs_agnumber_t)(XFS_BB_TO_FSBT(mp, d) / (mp)->m_sb.sb_agblocks))
  67 #define XFS_DADDR_TO_AGBNO(mp,d) \
  68         ((xfs_agblock_t)(XFS_BB_TO_FSBT(mp, d) % (mp)->m_sb.sb_agblocks))
  69 #else
  70 struct cred;
  71 struct vfs;
  72 struct vnode;
  73 struct xfs_mount_args;
  74 struct xfs_ihash;
  75 struct xfs_chash;
  76 struct xfs_inode;
  77 struct xfs_perag;
  78 struct xfs_quotainfo;
  79 struct xfs_iocore;
  80 struct xfs_dio;
  81 struct xfs_bmbt_irec;
  82 struct xfs_bmap_free;
  83
  84 #define SPLDECL(s)              unsigned long s
  85 #define AIL_LOCK_T              lock_t
  86 #define AIL_LOCKINIT(x,y)       spinlock_init(x,y)
  87 #define AIL_LOCK_DESTROY(x)     spinlock_destroy(x)
  88 #define AIL_LOCK(mp,s)          s=mutex_spinlock(&(mp)->m_ail_lock)
  89 #define AIL_UNLOCK(mp,s)        mutex_spinunlock(&(mp)->m_ail_lock, s)
  90
  91
  92 /* Prototypes and functions for I/O core modularization, a vector
  93  * of functions is used to indirect from xfs/cxfs independent code
  94  * to the xfs/cxfs dependent code.
  95  * The vector is placed in the mount structure so that we can
  96  * minimize the number of memory indirections involved.
  97  */
  98
  99 typedef int             (*xfs_dio_write_t)(struct xfs_dio *);
 100 typedef int             (*xfs_dio_read_t)(struct xfs_dio *);
 101 typedef int             (*xfs_strat_write_t)(struct xfs_iocore *, struct xfs_buf *);
 102 typedef int             (*xfs_bmapi_t)(struct xfs_trans *, void *,
 103                                 xfs_fileoff_t, xfs_filblks_t, int,
 104                                 xfs_fsblock_t *, xfs_extlen_t,
 105                                 struct xfs_bmbt_irec *, int *,
 106                                 struct xfs_bmap_free *);
 107 typedef int             (*xfs_bmap_eof_t)(void *, xfs_fileoff_t, int, int *);
 108 typedef int             (*xfs_rsync_t)(void *, int, xfs_off_t, xfs_off_t);
 109 typedef uint            (*xfs_lck_map_shared_t)(void *);
 110 typedef void            (*xfs_lock_t)(void *, uint);
 111 typedef void            (*xfs_lock_demote_t)(void *, uint);
 112 typedef int             (*xfs_lock_nowait_t)(void *, uint);
 113 typedef void            (*xfs_unlk_t)(void *, unsigned int);
 114 typedef void            (*xfs_chgtime_t)(void *, int);
 115 typedef xfs_fsize_t     (*xfs_size_t)(void *);
 116 typedef xfs_fsize_t     (*xfs_setsize_t)(void *, xfs_off_t);
 117 typedef xfs_fsize_t     (*xfs_lastbyte_t)(void *);
 118
 119 typedef struct xfs_ioops {
 120         xfs_bmapi_t             xfs_bmapi_func;
 121         xfs_bmap_eof_t          xfs_bmap_eof_func;
 122         xfs_lock_t              xfs_ilock;
 123         xfs_lock_demote_t       xfs_ilock_demote;
 124         xfs_lock_nowait_t       xfs_ilock_nowait;
 125         xfs_unlk_t              xfs_unlock;
 126         xfs_chgtime_t           xfs_chgtime;
 127         xfs_size_t              xfs_size_func;
 128         xfs_lastbyte_t          xfs_lastbyte;
 129 } xfs_ioops_t;
 130
 131
 132 #define XFS_BMAPI(mp, trans,io,bno,len,f,first,tot,mval,nmap,flist)     \
 133         (*(mp)->m_io_ops.xfs_bmapi_func) \
 134                 (trans,(io)->io_obj,bno,len,f,first,tot,mval,nmap,flist)
 135
 136 #define XFS_BMAP_EOF(mp, io, endoff, whichfork, eof) \
 137         (*(mp)->m_io_ops.xfs_bmap_eof_func) \
 138                 ((io)->io_obj, endoff, whichfork, eof)
 139
 140 #define XFS_ILOCK(mp, io, mode) \
 141         (*(mp)->m_io_ops.xfs_ilock)((io)->io_obj, mode)
 142
 143 #define XFS_IUNLOCK(mp, io, mode) \
 144         (*(mp)->m_io_ops.xfs_unlock)((io)->io_obj, mode)
 145
 146 #define XFS_ILOCK_DEMOTE(mp, io, mode) \
 147         (*(mp)->m_io_ops.xfs_ilock_demote)((io)->io_obj, mode)
 148
 149 #define XFS_SIZE(mp, io) \
 150         (*(mp)->m_io_ops.xfs_size_func)((io)->io_obj)
 151
 152 #define XFS_LASTBYTE(mp, io) \
 153         (*(mp)->m_io_ops.xfs_lastbyte)((io)->io_obj)
 154
 155
 156 typedef struct xfs_mount {
 157         bhv_desc_t              m_bhv;          /* vfs xfs behavior */
 158         xfs_tid_t               m_tid;          /* next unused tid for fs */
 159         AIL_LOCK_T              m_ail_lock;     /* fs AIL mutex */
 160         xfs_ail_entry_t         m_ail;          /* fs active log item list */
 161         uint                    m_ail_gen;      /* fs AIL generation count */
 162         xfs_sb_t                m_sb;           /* copy of fs superblock */
 163         lock_t                  m_sb_lock;      /* sb counter mutex */
 164         struct xfs_buf          *m_sb_bp;       /* buffer for superblock */
 165         char                    *m_fsname;      /* filesystem name */
 166         int                     m_fsname_len;   /* strlen of fs name */
 167         int                     m_bsize;        /* fs logical block size */
 168         xfs_agnumber_t          m_agfrotor;     /* last ag where space found */
 169         xfs_agnumber_t          m_agirotor;     /* last ag dir inode alloced */
 170         xfs_agnumber_t          m_maxagi;       /* highest inode alloc group */
 171         int                     m_ihsize;       /* size of next field */
 172         struct xfs_ihash        *m_ihash;       /* fs private inode hash table*/
 173         struct xfs_inode        *m_inodes;      /* active inode list */
 174         mutex_t                 m_ilock;        /* inode list mutex */
 175         uint                    m_ireclaims;    /* count of calls to reclaim*/
 176         uint                    m_readio_log;   /* min read size log bytes */
 177         uint                    m_readio_blocks; /* min read size blocks */
 178         uint                    m_writeio_log;  /* min write size log bytes */
 179         uint                    m_writeio_blocks; /* min write size blocks */
 180         void                    *m_log;         /* log specific stuff */
 181         int                     m_logbufs;      /* number of log buffers */
 182         int                     m_logbsize;     /* size of each log buffer */
 183         uint                    m_rsumlevels;   /* rt summary levels */
 184         uint                    m_rsumsize;     /* size of rt summary, bytes */
 185         struct xfs_inode        *m_rbmip;       /* pointer to bitmap inode */
 186         struct xfs_inode        *m_rsumip;      /* pointer to summary inode */
 187         struct xfs_inode        *m_rootip;      /* pointer to root directory */
 188         struct xfs_quotainfo    *m_quotainfo;   /* disk quota information */
 189         xfs_buftarg_t           *m_ddev_targp;  /* saves taking the address */
 190         xfs_buftarg_t           *m_logdev_targp;/* ptr to log device */
 191         xfs_buftarg_t           *m_rtdev_targp; /* ptr to rt device */
 192 #define m_dev           m_ddev_targp->pbr_dev
 193         __uint8_t               m_dircook_elog; /* log d-cookie entry bits */
 194         __uint8_t               m_blkbit_log;   /* blocklog + NBBY */
 195         __uint8_t               m_blkbb_log;    /* blocklog - BBSHIFT */
 196         __uint8_t               m_agno_log;     /* log #ag's */
 197         __uint8_t               m_agino_log;    /* #bits for agino in inum */
 198         __uint8_t               m_nreadaheads;  /* #readahead buffers */
 199         __uint16_t              m_inode_cluster_size;/* min inode buf size */
 200         uint                    m_blockmask;    /* sb_blocksize-1 */
 201         uint                    m_blockwsize;   /* sb_blocksize in words */
 202         uint                    m_blockwmask;   /* blockwsize-1 */
 203         uint                    m_alloc_mxr[2]; /* XFS_ALLOC_BLOCK_MAXRECS */
 204         uint                    m_alloc_mnr[2]; /* XFS_ALLOC_BLOCK_MINRECS */
 205         uint                    m_bmap_dmxr[2]; /* XFS_BMAP_BLOCK_DMAXRECS */
 206         uint                    m_bmap_dmnr[2]; /* XFS_BMAP_BLOCK_DMINRECS */
 207         uint                    m_inobt_mxr[2]; /* XFS_INOBT_BLOCK_MAXRECS */
 208         uint                    m_inobt_mnr[2]; /* XFS_INOBT_BLOCK_MINRECS */
 209         uint                    m_ag_maxlevels; /* XFS_AG_MAXLEVELS */
 210         uint                    m_bm_maxlevels[2]; /* XFS_BM_MAXLEVELS */
 211         uint                    m_in_maxlevels; /* XFS_IN_MAXLEVELS */
 212         struct xfs_perag        *m_perag;       /* per-ag accounting info */
 213         struct rw_semaphore     m_peraglock;    /* lock for m_perag (pointer) */
 214         sema_t                  m_growlock;     /* growfs mutex */
 215         int                     m_fixedfsid[2]; /* unchanged for life of FS */
 216         uint                    m_dmevmask;     /* DMI events for this FS */
 217         uint                    m_flags;        /* global mount flags */
 218         uint                    m_attroffset;   /* inode attribute offset */
 219         int                     m_da_node_ents; /* how many entries in danode */
 220         int                     m_ialloc_inos;  /* inodes in inode allocation */
 221         int                     m_ialloc_blks;  /* blocks in inode allocation */
 222         int                     m_litino;       /* size of inode union area */
 223         int                     m_inoalign_mask;/* mask sb_inoalignmt if used */
 224         uint                    m_qflags;       /* quota status flags */
 225         xfs_trans_reservations_t m_reservations;/* precomputed res values */
 226         __uint64_t              m_maxicount;    /* maximum inode count */
 227         __uint64_t              m_resblks;      /* total reserved blocks */
 228         __uint64_t              m_resblks_avail;/* available reserved blocks */
 229 #if XFS_BIG_FILESYSTEMS
 230         xfs_ino_t               m_inoadd;       /* add value for ino64_offset */
 231 #endif
 232         int                     m_dalign;       /* stripe unit */
 233         int                     m_swidth;       /* stripe width */
 234         int                     m_lstripemask;  /* log stripe mask */
 235         int                     m_sinoalign;    /* stripe unit inode alignmnt */
 236         int                     m_attr_magicpct;/* 37% of the blocksize */
 237         int                     m_dir_magicpct; /* 37% of the dir blocksize */
 238         __uint8_t               m_mk_sharedro;  /* mark shared ro on unmount */
 239         __uint8_t               m_inode_quiesce;/* call quiesce on new inodes.
 240                                                    field governed by m_ilock */
 241         __uint8_t               m_dirversion;   /* 1 or 2 */
 242         xfs_dirops_t            m_dirops;       /* table of dir funcs */
 243         int                     m_dirblksize;   /* directory block sz--bytes */
 244         int                     m_dirblkfsbs;   /* directory block sz--fsbs */
 245         xfs_dablk_t             m_dirdatablk;   /* blockno of dir data v2 */
 246         xfs_dablk_t             m_dirleafblk;   /* blockno of dir non-data v2 */
 247         xfs_dablk_t             m_dirfreeblk;   /* blockno of dirfreeindex v2 */
 248         int                     m_chsize;       /* size of next field */
 249         struct xfs_chash        *m_chash;       /* fs private inode per-cluster
 250                                                  * hash table */
 251         struct xfs_ioops        m_io_ops;       /* vector of I/O ops */
 252         struct xfs_expinfo      *m_expinfo;     /* info to export to other
 253                                                    cells. */
 254         uint64_t                m_shadow_pinmask;
 255                                                 /* which bits matter in rpc
 256                                                    log item pin masks */
 257         uint                    m_cxfstype;     /* mounted shared, etc. */
 258         lock_t                  m_freeze_lock;  /* Lock for m_frozen */
 259         uint                    m_frozen;       /* FS frozen for shutdown or
 260                                                  * snapshot */
 261         sv_t                    m_wait_unfreeze;/* waiting to unfreeze */
 262         atomic_t                m_active_trans; /* number trans frozen */
 263         struct timer_list       m_sbdirty_timer;/* superblock dirty timer
 264                                                  * for nfs refcache */
 265 } xfs_mount_t;
 266
 267 /*
 268  * Flags for m_flags.
 269  */
 270 #define XFS_MOUNT_WSYNC         0x00000001      /* for nfs - all metadata ops
 271                                                    must be synchronous except
 272                                                    for space allocations */
 273 #if XFS_BIG_FILESYSTEMS
 274 #define XFS_MOUNT_INO64         0x00000002
 275 #endif
 276 #define XFS_MOUNT_ROOTQCHECK    0x00000004
 277                              /* 0x00000008      -- currently unused */
 278 #define XFS_MOUNT_FS_SHUTDOWN   0x00000010      /* atomic stop of all filesystem
 279                                                    operations, typically for
 280                                                    disk errors in metadata */
 281 #define XFS_MOUNT_NOATIME       0x00000020      /* don't modify inode access
 282                                                    times on reads */
 283 #define XFS_MOUNT_RETERR        0x00000040      /* return alignment errors to
 284                                                    user */
 285 #define XFS_MOUNT_NOALIGN       0x00000080      /* turn off stripe alignment
 286                                                    allocations */
 287                              /* 0x00000100      -- currently unused */
 288 #define XFS_MOUNT_REGISTERED    0x00000200      /* registered with cxfs master
 289                                                    cell logic */
 290 #define XFS_MOUNT_NORECOVERY    0x00000400      /* no recovery - dirty fs */
 291 #define XFS_MOUNT_SHARED        0x00000800      /* shared mount */
 292 #define XFS_MOUNT_DFLT_IOSIZE   0x00001000      /* set default i/o size */
 293 #define XFS_MOUNT_OSYNCISOSYNC  0x00002000      /* o_sync is REALLY o_sync */
 294                                                 /* osyncisdsync is now default*/
 295 #define XFS_MOUNT_NOUUID        0x00004000      /* ignore uuid during mount */
 296 #define XFS_MOUNT_32BITINODES   0x00008000      /* do not create inodes above
 297                                                  * 32 bits in size */
 298 #define XFS_MOUNT_IRIXSGID      0x00010000      /* Irix-style sgid inheritance */
 299 #define XFS_MOUNT_NOLOGFLUSH    0x00020000
 300
 301 /*
 302  * Flags for m_cxfstype
 303  */
 304 #define XFS_CXFS_NOT            0x00000001      /* local mount */
 305 #define XFS_CXFS_SERVER         0x00000002      /* we're the CXFS server */
 306 #define XFS_CXFS_CLIENT         0x00000004      /* We're a CXFS client */
 307 #define XFS_CXFS_REC_ENABLED    0x00000008      /* recovery is enabled */
 308
 309 #define XFS_FORCED_SHUTDOWN(mp) ((mp)->m_flags & XFS_MOUNT_FS_SHUTDOWN)
 310
 311 /*
 312  * Default minimum read and write sizes.
 313  */
 314 #define XFS_READIO_LOG_LARGE    12
 315 #define XFS_WRITEIO_LOG_LARGE   12
 316 /*
 317  * Default allocation size
 318  */
 319 #define XFS_WRITE_IO_LOG        16
 320
 321 /*
 322  * Max and min values for UIO and mount-option defined I/O sizes;
 323  * min value can't be less than a page.  Currently unused.
 324  */
 325 #define XFS_MAX_IO_LOG          16      /* 64K */
 326 #define XFS_MIN_IO_LOG          PAGE_SHIFT
 327
 328 /*
 329  * Synchronous read and write sizes.  This should be
 330  * better for NFSv2 wsync filesystems.
 331  */
 332 #define XFS_WSYNC_READIO_LOG    15      /* 32K */
 333 #define XFS_WSYNC_WRITEIO_LOG   14      /* 16K */
 334
 335 #define xfs_force_shutdown(m,f) VFS_FORCE_SHUTDOWN(XFS_MTOVFS(m),f)
 336 /*
 337  * Flags sent to xfs_force_shutdown.
 338  */
 339 #define XFS_METADATA_IO_ERROR   0x1
 340 #define XFS_LOG_IO_ERROR        0x2
 341 #define XFS_FORCE_UMOUNT        0x4
 342 #define XFS_CORRUPT_INCORE      0x8     /* corrupt in-memory data structures */
 343 #define XFS_SHUTDOWN_REMOTE_REQ 0x10    /* shutdown came from remote cell */
 344
 345 /*
 346  * xflags for xfs_syncsub
 347  */
 348 #define XFS_XSYNC_RELOC         0x01
 349
 350 /*
 351  * Flags for xfs_mountfs
 352  */
 353 #define XFS_MFSI_SECOND         0x01    /* Is a cxfs secondary mount -- skip */
 354                                         /* stuff which should only be done */
 355                                         /* once. */
 356 #define XFS_MFSI_CLIENT         0x02    /* Is a client -- skip lots of stuff */
 357 #define XFS_MFSI_NOUNLINK       0x08    /* Skip unlinked inode processing in */
 358                                         /* log recovery */
 359
 360 /*
 361  * Macros for getting from mount to vfs and back.
 362  */
 363 #if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_MTOVFS)
 364 struct vfs *xfs_mtovfs(xfs_mount_t *mp);
 365 #define XFS_MTOVFS(mp)          xfs_mtovfs(mp)
 366 #else
 367 #define XFS_MTOVFS(mp)          (bhvtovfs(&(mp)->m_bhv))
 368 #endif
 369 #if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_BHVTOM)
 370 xfs_mount_t *xfs_bhvtom(bhv_desc_t *bdp);
 371 #define XFS_BHVTOM(bdp) xfs_bhvtom(bdp)
 372 #else
 373 #define XFS_BHVTOM(bdp)         ((xfs_mount_t *)BHV_PDATA(bdp))
 374 #endif
 375
 376
 377 /*
 378  * Moved here from xfs_ag.h to avoid reordering header files
 379  */
 380
 381 #if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DADDR_TO_AGNO)
 382 xfs_agnumber_t xfs_daddr_to_agno(struct xfs_mount *mp, xfs_daddr_t d);
 383 #define XFS_DADDR_TO_AGNO(mp,d)         xfs_daddr_to_agno(mp,d)
 384 #else
 385
 386 static inline xfs_agnumber_t XFS_DADDR_TO_AGNO(xfs_mount_t *mp, xfs_daddr_t d)
 387 {
 388         d = XFS_BB_TO_FSBT(mp, d);
 389         do_div(d, mp->m_sb.sb_agblocks);
 390         return (xfs_agnumber_t) d;
 391 }
 392
 393 #endif
 394 #if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DADDR_TO_AGBNO)
 395 xfs_agblock_t xfs_daddr_to_agbno(struct xfs_mount *mp, xfs_daddr_t d);
 396 #define XFS_DADDR_TO_AGBNO(mp,d)        xfs_daddr_to_agbno(mp,d)
 397 #else
 398
 399 static inline xfs_agblock_t XFS_DADDR_TO_AGBNO(xfs_mount_t *mp, xfs_daddr_t d)
 400 {
 401         d = XFS_BB_TO_FSBT(mp, d);
 402         return (xfs_agblock_t) do_div(d, mp->m_sb.sb_agblocks);
 403 }
 404
 405 #endif
 406
 407 /*
 408  * This structure is for use by the xfs_mod_incore_sb_batch() routine.
 409  */
 410 typedef struct xfs_mod_sb {
 411         xfs_sb_field_t  msb_field;      /* Field to modify, see below */
 412         int             msb_delta;      /* change to make to the specified field */
 413 } xfs_mod_sb_t;
 414
 415 #define XFS_MOUNT_ILOCK(mp)     mutex_lock(&((mp)->m_ilock), PINOD)
 416 #define XFS_MOUNT_IUNLOCK(mp)   mutex_unlock(&((mp)->m_ilock))
 417 #define XFS_SB_LOCK(mp)         mutex_spinlock(&(mp)->m_sb_lock)
 418 #define XFS_SB_UNLOCK(mp,s)     mutex_spinunlock(&(mp)->m_sb_lock,(s))
 419
 420 void            xfs_mod_sb(xfs_trans_t *, __int64_t);
 421 xfs_mount_t     *xfs_mount_init(void);
 422 void            xfs_mount_free(xfs_mount_t *mp, int remove_bhv);
 423 int             xfs_mountfs(struct vfs *, xfs_mount_t *mp, dev_t, int);
 424
 425 int             xfs_unmountfs(xfs_mount_t *, struct cred *);
 426 void            xfs_unmountfs_close(xfs_mount_t *, struct cred *);
 427 int             xfs_unmountfs_writesb(xfs_mount_t *);
 428 int             xfs_unmount_flush(xfs_mount_t *, int);
 429 int             xfs_mod_incore_sb(xfs_mount_t *, xfs_sb_field_t, int, int);
 430 int             xfs_mod_incore_sb_batch(xfs_mount_t *, xfs_mod_sb_t *, uint, int);
 431 int             xfs_readsb(xfs_mount_t *mp);
 432 struct xfs_buf  *xfs_getsb(xfs_mount_t *, int);
 433 void            xfs_freesb(xfs_mount_t *);
 434 void            xfs_do_force_shutdown(bhv_desc_t *, int, char *, int);
 435 int             xfs_syncsub(xfs_mount_t *, int, int, int *);
 436 void            xfs_initialize_perag(xfs_mount_t *, int);
 437 void            xfs_xlatesb(void *, struct xfs_sb *, int, xfs_arch_t, __int64_t);
 438
 439 /*
 440  * Flags for freeze operations.
 441  */
 442 #define XFS_FREEZE_WRITE        1
 443 #define XFS_FREEZE_TRANS        2
 444
 445 void            xfs_start_freeze(xfs_mount_t *, int);
 446 void            xfs_finish_freeze(xfs_mount_t *);
 447 void            xfs_check_frozen(xfs_mount_t *, bhv_desc_t *, int);
 448
 449 extern  struct vfsops xfs_vfsops;
 450
 451 #endif  /* __KERNEL__ */
 452
 453 #endif  /* __XFS_MOUNT_H__ */