include/xfs_mount.h

   1 /*
   2  * Copyright (c) 2000 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 mounta;
  72 struct vfs;
  73 struct vnode;
  74 struct xfs_args;
  75 struct xfs_ihash;
  76 struct xfs_chash;
  77 struct xfs_inode;
  78 struct xfs_perag;
  79 struct xfs_quotainfo;
  80 struct xfs_iocore;
  81 struct xfs_dio;
  82 struct xfs_bmbt_irec;
  83 struct xfs_bmap_free;
  84
  85 #if defined(INTERRUPT_LATENCY_TESTING)
  86 #define SPLDECL(s)
  87 #define AIL_LOCK_T              mutex_t
  88 #define AIL_LOCKINIT(x,y)       mutex_init(x,MUTEX_DEFAULT, y)
  89 #define AIL_LOCK_DESTROY(x)     mutex_destroy(x)
  90 #define AIL_LOCK(mp,s)          mutex_lock(&(mp)->m_ail_lock, PZERO)
  91 #define AIL_UNLOCK(mp,s)        mutex_unlock(&(mp)->m_ail_lock)
  92 #else   /* !INTERRUPT_LATENCY_TESTING */
  93 #define SPLDECL(s)              int s
  94 #define AIL_LOCK_T              lock_t
  95 #define AIL_LOCKINIT(x,y)       spinlock_init(x,y)
  96 #define AIL_LOCK_DESTROY(x)     spinlock_destroy(x)
  97 #define AIL_LOCK(mp,s)          s=mutex_spinlock(&(mp)->m_ail_lock)
  98 #define AIL_UNLOCK(mp,s)        mutex_spinunlock(&(mp)->m_ail_lock, s)
  99 #endif /* !INTERRUPT_LATENCY_TESTING */
 100
 101
 102 /* Prototypes and functions for I/O core modularization, a vector
 103  * of functions is used to indirect from xfs/cxfs independent code
 104  * to the xfs/cxfs dependent code.
 105  * The vector is placed in the mount structure so that we can
 106  * minimize the number of memory indirections involved.
 107  */
 108
 109 typedef int             (*xfs_dio_write_t)(struct xfs_dio *);
 110 typedef int             (*xfs_dio_read_t)(struct xfs_dio *);
 111 typedef int             (*xfs_strat_write_t)(struct xfs_iocore *, struct xfs_buf *);
 112 typedef int             (*xfs_bmapi_t)(struct xfs_trans *, void *,
 113                                 xfs_fileoff_t, xfs_filblks_t, int,
 114                                 xfs_fsblock_t *, xfs_extlen_t,
 115                                 struct xfs_bmbt_irec *, int *,
 116                                 struct xfs_bmap_free *);
 117 typedef int             (*xfs_bmap_eof_t)(void *, xfs_fileoff_t, int, int *);
 118 typedef int             (*xfs_rsync_t)(void *, int, xfs_off_t, xfs_off_t);
 119 typedef uint            (*xfs_lck_map_shared_t)(void *);
 120 typedef void            (*xfs_lock_t)(void *, uint);
 121 typedef void            (*xfs_lock_demote_t)(void *, uint);
 122 typedef int             (*xfs_lock_nowait_t)(void *, uint);
 123 typedef void            (*xfs_unlk_t)(void *, unsigned int);
 124 typedef void            (*xfs_chgtime_t)(void *, int);
 125 typedef xfs_fsize_t     (*xfs_size_t)(void *);
 126 typedef xfs_fsize_t     (*xfs_setsize_t)(void *, xfs_off_t);
 127 typedef xfs_fsize_t     (*xfs_lastbyte_t)(void *);
 128
 129 #ifdef CELL_CAPABLE
 130 typedef int             (*xfs_checklock_t)(bhv_desc_t *, struct vnode *,
 131                                 int, off_t, off_t, int, struct cred *,
 132                                 struct flid *, vrwlock_t, int);
 133 #endif
 134
 135 typedef struct xfs_ioops {
 136         xfs_dio_write_t         xfs_dio_write_func;
 137         xfs_dio_read_t          xfs_dio_read_func;
 138         xfs_strat_write_t       xfs_strat_write_func;
 139         xfs_bmapi_t             xfs_bmapi_func;
 140         xfs_bmap_eof_t          xfs_bmap_eof_func;
 141         xfs_rsync_t             xfs_rsync_func;
 142         xfs_lck_map_shared_t    xfs_lck_map_shared;
 143         xfs_lock_t              xfs_ilock;
 144         xfs_lock_demote_t       xfs_ilock_demote;
 145         xfs_lock_nowait_t       xfs_ilock_nowait;
 146         xfs_unlk_t              xfs_unlock;
 147         xfs_chgtime_t           xfs_chgtime;
 148         xfs_size_t              xfs_size_func;
 149         xfs_setsize_t           xfs_setsize_func;
 150         xfs_lastbyte_t          xfs_lastbyte;
 151 #ifdef CELL_CAPABLE
 152         xfs_checklock_t         xfs_checklock;
 153 #endif
 154 } xfs_ioops_t;
 155
 156
 157 #define XFS_DIO_WRITE(mp, diop) \
 158         (*(mp)->m_io_ops.xfs_dio_write_func)(diop)
 159
 160 #define XFS_DIO_READ(mp, diop) \
 161         (*(mp)->m_io_ops.xfs_dio_read_func)(diop)
 162
 163 #define XFS_STRAT_WRITE(mp, io, bp) \
 164         (*(mp)->m_io_ops.xfs_strat_write_func)(io, bp)
 165
 166 #define XFS_BMAPI(mp, trans,io,bno,len,f,first,tot,mval,nmap,flist)     \
 167         (*(mp)->m_io_ops.xfs_bmapi_func) \
 168                 (trans,(io)->io_obj,bno,len,f,first,tot,mval,nmap,flist)
 169
 170 #define XFS_BMAP_EOF(mp, io, endoff, whichfork, eof) \
 171         (*(mp)->m_io_ops.xfs_bmap_eof_func) \
 172                 ((io)->io_obj, endoff, whichfork, eof)
 173
 174 #define XFS_RSYNC(mp, io, ioflag, start, end) \
 175         (*(mp)->m_io_ops.xfs_rsync_func)((io)->io_obj, ioflag, start, end)
 176
 177 #define XFS_LCK_MAP_SHARED(mp, io) \
 178         (*(mp)->m_io_ops.xfs_lck_map_shared)((io)->io_obj)
 179
 180 #define XFS_UNLK_MAP_SHARED(mp, io, mode) \
 181         (*(mp)->m_io_ops.xfs_unlock)((io)->io_obj, mode)
 182
 183 #define XFS_ILOCK(mp, io, mode) \
 184         (*(mp)->m_io_ops.xfs_ilock)((io)->io_obj, mode)
 185
 186 #define XFS_ILOCK_NOWAIT(mp, io, mode) \
 187         (*(mp)->m_io_ops.xfs_ilock_nowait)((io)->io_obj, mode)
 188
 189 #define XFS_IUNLOCK(mp, io, mode) \
 190         (*(mp)->m_io_ops.xfs_unlock)((io)->io_obj, mode)
 191
 192 #define XFS_ILOCK_DEMOTE(mp, io, mode) \
 193         (*(mp)->m_io_ops.xfs_ilock_demote)((io)->io_obj, mode)
 194
 195 #define XFS_CHGTIME(mp, io, flags) \
 196         (*(mp)->m_io_ops.xfs_chgtime)((io)->io_obj, flags)
 197
 198 #define XFS_SIZE(mp, io) \
 199         (*(mp)->m_io_ops.xfs_size_func)((io)->io_obj)
 200
 201 #define XFS_SETSIZE(mp, io, newsize) \
 202         (*(mp)->m_io_ops.xfs_setsize_func)((io)->io_obj, newsize)
 203
 204 #define XFS_LASTBYTE(mp, io) \
 205         (*(mp)->m_io_ops.xfs_lastbyte)((io)->io_obj)
 206
 207
 208 typedef struct xfs_mount {
 209         bhv_desc_t              m_bhv;          /* vfs xfs behavior */
 210         xfs_tid_t               m_tid;          /* next unused tid for fs */
 211         AIL_LOCK_T              m_ail_lock;     /* fs AIL mutex */
 212         xfs_ail_entry_t         m_ail;          /* fs active log item list */
 213         uint                    m_ail_gen;      /* fs AIL generation count */
 214         xfs_sb_t                m_sb;           /* copy of fs superblock */
 215         lock_t                  m_sb_lock;      /* sb counter mutex */
 216         struct xfs_buf          *m_sb_bp;       /* buffer for superblock */
 217         char                    *m_fsname;      /* filesystem name */
 218         int                     m_fsname_len;   /* strlen of fs name */
 219         int                     m_bsize;        /* fs logical block size */
 220         xfs_agnumber_t          m_agfrotor;     /* last ag where space found */
 221         xfs_agnumber_t          m_agirotor;     /* last ag dir inode alloced */
 222         xfs_agnumber_t          m_maxagi;       /* highest inode alloc group */
 223         int                     m_ihsize;       /* size of next field */
 224         struct xfs_ihash        *m_ihash;       /* fs private inode hash table*/
 225         struct xfs_inode        *m_inodes;      /* active inode list */
 226         mutex_t                 m_ilock;        /* inode list mutex */
 227         uint                    m_ireclaims;    /* count of calls to reclaim*/
 228         uint                    m_readio_log;   /* min read size log bytes */
 229         uint                    m_readio_blocks; /* min read size blocks */
 230         uint                    m_writeio_log;  /* min write size log bytes */
 231         uint                    m_writeio_blocks; /* min write size blocks */
 232         void                    *m_log;         /* log specific stuff */
 233         int                     m_logbufs;      /* number of log buffers */
 234         int                     m_logbsize;     /* size of each log buffer */
 235         uint                    m_rsumlevels;   /* rt summary levels */
 236         uint                    m_rsumsize;     /* size of rt summary, bytes */
 237         struct xfs_inode        *m_rbmip;       /* pointer to bitmap inode */
 238         struct xfs_inode        *m_rsumip;      /* pointer to summary inode */
 239         struct xfs_inode        *m_rootip;      /* pointer to root directory */
 240         struct xfs_quotainfo    *m_quotainfo;   /* disk quota information */
 241         buftarg_t               m_ddev_targ;    /* ptr to data device */
 242         buftarg_t               m_logdev_targ;  /* ptr to log device */
 243         buftarg_t               m_rtdev_targ;   /* ptr to rt device */
 244         buftarg_t               *m_ddev_targp;  /* saves taking the address */
 245 #define m_rtdev_targp(m)(&(m)->m_rtdev_targ)
 246 #define m_dev           m_ddev_targ.dev
 247 #define m_logdev        m_logdev_targ.dev
 248 #define m_rtdev         m_rtdev_targ.dev
 249         __uint8_t               m_dircook_elog; /* log d-cookie entry bits */
 250         __uint8_t               m_blkbit_log;   /* blocklog + NBBY */
 251         __uint8_t               m_blkbb_log;    /* blocklog - BBSHIFT */
 252         __uint8_t               m_agno_log;     /* log #ag's */
 253         __uint8_t               m_agino_log;    /* #bits for agino in inum */
 254         __uint8_t               m_nreadaheads;  /* #readahead buffers */
 255         __uint16_t              m_inode_cluster_size;/* min inode buf size */
 256         uint                    m_blockmask;    /* sb_blocksize-1 */
 257         uint                    m_blockwsize;   /* sb_blocksize in words */
 258         uint                    m_blockwmask;   /* blockwsize-1 */
 259         uint                    m_alloc_mxr[2]; /* XFS_ALLOC_BLOCK_MAXRECS */
 260         uint                    m_alloc_mnr[2]; /* XFS_ALLOC_BLOCK_MINRECS */
 261         uint                    m_bmap_dmxr[2]; /* XFS_BMAP_BLOCK_DMAXRECS */
 262         uint                    m_bmap_dmnr[2]; /* XFS_BMAP_BLOCK_DMINRECS */
 263         uint                    m_inobt_mxr[2]; /* XFS_INOBT_BLOCK_MAXRECS */
 264         uint                    m_inobt_mnr[2]; /* XFS_INOBT_BLOCK_MINRECS */
 265         uint                    m_ag_maxlevels; /* XFS_AG_MAXLEVELS */
 266         uint                    m_bm_maxlevels[2]; /* XFS_BM_MAXLEVELS */
 267         uint                    m_in_maxlevels; /* XFS_IN_MAXLEVELS */
 268         struct xfs_perag        *m_perag;       /* per-ag accounting info */
 269         mrlock_t                m_peraglock;    /* lock for m_perag (pointer) */
 270         sema_t                  m_growlock;     /* growfs mutex */
 271         int                     m_fixedfsid[2]; /* unchanged for life of FS */
 272         uint                    m_dmevmask;     /* DMI events for this FS */
 273         uint                    m_flags;        /* global mount flags */
 274         uint                    m_attroffset;   /* inode attribute offset */
 275         int                     m_da_node_ents; /* how many entries in danode */
 276         int                     m_ialloc_inos;  /* inodes in inode allocation */
 277         int                     m_ialloc_blks;  /* blocks in inode allocation */
 278         int                     m_litino;       /* size of inode union area */
 279         int                     m_inoalign_mask;/* mask sb_inoalignmt if used */
 280         uint                    m_qflags;       /* quota status flags */
 281         xfs_trans_reservations_t m_reservations;/* precomputed res values */
 282         __uint64_t              m_maxicount;    /* maximum inode count */
 283         __uint64_t              m_resblks;      /* total reserved blocks */
 284         __uint64_t              m_resblks_avail;/* available reserved blocks */
 285 #if XFS_BIG_FILESYSTEMS
 286         xfs_ino_t               m_inoadd;       /* add value for ino64_offset */
 287 #endif
 288         int                     m_dalign;       /* stripe unit */
 289         int                     m_swidth;       /* stripe width */
 290         int                     m_sinoalign;    /* stripe unit inode alignmnt */
 291         int                     m_attr_magicpct;/* 37% of the blocksize */
 292         int                     m_dir_magicpct; /* 37% of the dir blocksize */
 293         __uint8_t               m_mk_sharedro;  /* mark shared ro on unmount */
 294         __uint8_t               m_inode_quiesce;/* call quiesce on new inodes.
 295                                                    field governed by m_ilock */
 296         __uint8_t               m_dirversion;   /* 1 or 2 */
 297         xfs_dirops_t            m_dirops;       /* table of dir funcs */
 298         int                     m_dirblksize;   /* directory block sz--bytes */
 299         int                     m_dirblkfsbs;   /* directory block sz--fsbs */
 300         xfs_dablk_t             m_dirdatablk;   /* blockno of dir data v2 */
 301         xfs_dablk_t             m_dirleafblk;   /* blockno of dir non-data v2 */
 302         xfs_dablk_t             m_dirfreeblk;   /* blockno of dirfreeindex v2 */
 303         int                     m_chsize;       /* size of next field */
 304         struct xfs_chash        *m_chash;       /* fs private inode per-cluster
 305                                                  * hash table */
 306         struct xfs_ioops        m_io_ops;       /* vector of I/O ops */
 307         struct xfs_expinfo      *m_expinfo;     /* info to export to other
 308                                                    cells. */
 309         uint64_t                m_shadow_pinmask;
 310                                                 /* which bits matter in rpc
 311                                                    log item pin masks */
 312         uint                    m_cxfstype;     /* mounted shared, etc. */
 313         lock_t                  m_freeze_lock;  /* Lock for m_frozen */
 314         uint                    m_frozen;       /* FS frozen for shutdown or
 315                                                  * snapshot */
 316         sv_t                    m_wait_unfreeze;/* waiting to unfreeze */
 317         atomic_t                m_active_trans; /* number trans frozen */
 318 } xfs_mount_t;
 319
 320 /*
 321  * Flags for m_flags.
 322  */
 323 #define XFS_MOUNT_WSYNC         0x00000001      /* for nfs - all metadata ops
 324                                                    must be synchronous except
 325                                                    for space allocations */
 326 #if XFS_BIG_FILESYSTEMS
 327 #define XFS_MOUNT_INO64         0x00000002
 328 #endif
 329 #define XFS_MOUNT_ROOTQCHECK    0x00000004
 330                              /* 0x00000008      -- currently unused */
 331 #define XFS_MOUNT_FS_SHUTDOWN   0x00000010      /* atomic stop of all filesystem
 332                                                    operations, typically for
 333                                                    disk errors in metadata */
 334 #define XFS_MOUNT_NOATIME       0x00000020      /* don't modify inode access
 335                                                    times on reads */
 336 #define XFS_MOUNT_RETERR        0x00000040      /* return alignment errors to
 337                                                    user */
 338 #define XFS_MOUNT_NOALIGN       0x00000080      /* turn off stripe alignment
 339                                                    allocations */
 340                              /* 0x00000100      -- currently unused */
 341 #define XFS_MOUNT_REGISTERED    0x00000200      /* registered with cxfs master
 342                                                    cell logic */
 343 #define XFS_MOUNT_NORECOVERY    0x00000400      /* no recovery - dirty fs */
 344 #define XFS_MOUNT_SHARED        0x00000800      /* shared mount */
 345 #define XFS_MOUNT_DFLT_IOSIZE   0x00001000      /* set default i/o size */
 346 #define XFS_MOUNT_OSYNCISDSYNC  0x00002000      /* treat o_sync like o_dsync */
 347 #define XFS_MOUNT_NOUUID        0x00004000      /* ignore uuid during mount */
 348 #define XFS_MOUNT_32BITINODES   0x00008000      /* do not create inodes above
 349                                                  * 32 bits in size */
 350
 351 /*
 352  * Flags for m_cxfstype
 353  */
 354 #define XFS_CXFS_NOT            0x00000001      /* local mount */
 355 #define XFS_CXFS_SERVER         0x00000002      /* we're the CXFS server */
 356 #define XFS_CXFS_CLIENT         0x00000004      /* We're a CXFS client */
 357 #define XFS_CXFS_REC_ENABLED    0x00000008      /* recovery is enabled */
 358
 359 #define XFS_FORCED_SHUTDOWN(mp) ((mp)->m_flags & XFS_MOUNT_FS_SHUTDOWN)
 360
 361 /*
 362  * Default minimum read and write sizes.
 363  */
 364 #define XFS_READIO_LOG_LARGE    12      /* > 32MB memory */
 365 #define XFS_WRITEIO_LOG_LARGE   12
 366
 367 /*
 368  * max and min values for UIO and mount-option defined I/O sizes
 369  * min value can't be less than a page.  Lower limit for 4K machines
 370  * is 4K because that's what was tested.
 371  */
 372 #define XFS_MAX_IO_LOG          16      /* 64K */
 373
 374 #if (_PAGESZ == 16384) || (_PAGESZ == 8192)
 375 #define XFS_MIN_IO_LOG          14      /* 16K */
 376 #elif _PAGESZ == 4096
 377 #define XFS_MIN_IO_LOG          12      /* 4K */
 378 #else
 379 #error  "Unknown page size"
 380 #endif
 381
 382
 383 /*
 384  * Synchronous read and write sizes.  This should be
 385  * better for NFSv2 wsync filesystems.
 386  */
 387 #define XFS_WSYNC_READIO_LOG    15      /* 32K */
 388 #define XFS_WSYNC_WRITEIO_LOG   14      /* 16K */
 389
 390 #define xfs_force_shutdown(m,f) _xfs_force_shutdown(m,f,__FILE__,__LINE__);
 391 /*
 392  * Flags sent to xfs_force_shutdown.
 393  */
 394 #define XFS_METADATA_IO_ERROR   0x1
 395 #define XFS_LOG_IO_ERROR        0x2
 396 #define XFS_FORCE_UMOUNT        0x4
 397 #define XFS_CORRUPT_INCORE      0x8     /* corrupt in-memory data structures */
 398 #if CELL_CAPABLE
 399 #define XFS_SHUTDOWN_REMOTE_REQ 0x10    /* shutdown req came from remote cell */
 400 #endif
 401
 402 /*
 403  * xflags for xfs_syncsub
 404  */
 405 #define XFS_XSYNC_RELOC         0x01
 406
 407 /*
 408  * Flags for xfs_mountfs
 409  */
 410 #define XFS_MFSI_SECOND         0x01    /* Is a cxfs secondary mount -- skip */
 411                                         /* stuff which should only be done */
 412                                         /* once. */
 413 #define XFS_MFSI_CLIENT         0x02    /* Is a client -- skip lots of stuff */
 414 #define XFS_MFSI_NOUNLINK       0x08    /* Skip unlinked inode processing in */
 415                                         /* log recovery */
 416
 417 /*
 418  * Macros for getting from mount to vfs and back.
 419  */
 420 #if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_MTOVFS)
 421 struct vfs *xfs_mtovfs(xfs_mount_t *mp);
 422 #define XFS_MTOVFS(mp)          xfs_mtovfs(mp)
 423 #else
 424 #define XFS_MTOVFS(mp)          (bhvtovfs(&(mp)->m_bhv))
 425 #endif
 426 #if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_BHVTOM)
 427 xfs_mount_t *xfs_bhvtom(bhv_desc_t *bdp);
 428 #define XFS_BHVTOM(bdp) xfs_bhvtom(bdp)
 429 #else
 430 #define XFS_BHVTOM(bdp)         ((xfs_mount_t *)BHV_PDATA(bdp))
 431 #endif
 432
 433
 434 /*
 435  * Moved here from xfs_ag.h to avoid reordering header files
 436  */
 437
 438 #if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DADDR_TO_AGNO)
 439 xfs_agnumber_t xfs_daddr_to_agno(struct xfs_mount *mp, xfs_daddr_t d);
 440 #define XFS_DADDR_TO_AGNO(mp,d)         xfs_daddr_to_agno(mp,d)
 441 #else
 442
 443 static inline xfs_agnumber_t XFS_DADDR_TO_AGNO(xfs_mount_t *mp, xfs_daddr_t d)
 444 {
 445         d = XFS_BB_TO_FSBT(mp, d);
 446         do_div(d, mp->m_sb.sb_agblocks);
 447         return (xfs_agnumber_t) d;
 448 }
 449
 450 #endif
 451 #if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DADDR_TO_AGBNO)
 452 xfs_agblock_t xfs_daddr_to_agbno(struct xfs_mount *mp, xfs_daddr_t d);
 453 #define XFS_DADDR_TO_AGBNO(mp,d)        xfs_daddr_to_agbno(mp,d)
 454 #else
 455
 456 static inline xfs_agblock_t XFS_DADDR_TO_AGBNO(xfs_mount_t *mp, xfs_daddr_t d)
 457 {
 458         d = XFS_BB_TO_FSBT(mp, d);
 459         return (xfs_agblock_t) do_div(d, mp->m_sb.sb_agblocks);
 460 }
 461
 462 #endif
 463
 464 /*
 465  * This structure is for use by the xfs_mod_incore_sb_batch() routine.
 466  */
 467 typedef struct xfs_mod_sb {
 468         xfs_sb_field_t  msb_field;      /* Field to modify, see below */
 469         int             msb_delta;      /* change to make to the specified field */
 470 } xfs_mod_sb_t;
 471
 472 #define XFS_MOUNT_ILOCK(mp)     mutex_lock(&((mp)->m_ilock), PINOD)
 473 #define XFS_MOUNT_IUNLOCK(mp)   mutex_unlock(&((mp)->m_ilock))
 474 #define XFS_SB_LOCK(mp)         mutex_spinlock(&(mp)->m_sb_lock)
 475 #define XFS_SB_UNLOCK(mp,s)     mutex_spinunlock(&(mp)->m_sb_lock,(s))
 476
 477 void            xfs_mod_sb(xfs_trans_t *, __int64_t);
 478 xfs_mount_t     *xfs_mount_init(void);
 479 void            xfs_mount_free(xfs_mount_t *mp, int remove_bhv);
 480 int             xfs_mountfs(struct vfs *, xfs_mount_t *mp, dev_t, int);
 481 int             xfs_mountargs(struct mounta *, struct xfs_args *);
 482
 483 int             xfs_unmountfs(xfs_mount_t *, int, struct cred *);
 484 void            xfs_unmountfs_close(xfs_mount_t *, int, struct cred *);
 485 int             xfs_unmountfs_writesb(xfs_mount_t *);
 486 int             xfs_unmount_flush(xfs_mount_t *, int);
 487 int             xfs_mod_incore_sb(xfs_mount_t *, xfs_sb_field_t, int, int);
 488 int             xfs_mod_incore_sb_batch(xfs_mount_t *, xfs_mod_sb_t *, uint, int);
 489 int             xfs_readsb(xfs_mount_t *mp, dev_t);
 490 struct xfs_buf  *xfs_getsb(xfs_mount_t *, int);
 491 void            xfs_freesb(xfs_mount_t *);
 492 void            _xfs_force_shutdown(struct xfs_mount *, int, char *, int);
 493 int             xfs_syncsub(xfs_mount_t *, int, int, int *);
 494 void            xfs_initialize_perag(xfs_mount_t *, int);
 495 void            xfs_xlatesb(void *, struct xfs_sb *, int, xfs_arch_t, __int64_t);
 496
 497 /*
 498  * Flags for freeze operations.
 499  */
 500 #define XFS_FREEZE_WRITE        1
 501 #define XFS_FREEZE_TRANS        2
 502
 503 void            xfs_start_freeze(xfs_mount_t *, int);
 504 void            xfs_finish_freeze(xfs_mount_t *);
 505 void            xfs_check_frozen(xfs_mount_t *, bhv_desc_t *, int, int);
 506
 507 extern  struct vfsops xfs_vfsops;
 508
 509 #endif  /* __KERNEL__ */
 510
 511 #endif  /* __XFS_MOUNT_H__ */