include/xfs_mount.h

   1 /*
   2  * Copyright (c) 2000-2003 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 log;
  72 struct vfs;
  73 struct vnode;
  74 struct xfs_mount_args;
  75 struct xfs_ihash;
  76 struct xfs_chash;
  77 struct xfs_inode;
  78 struct xfs_perag;
  79 struct xfs_iocore;
  80 struct xfs_bmbt_irec;
  81 struct xfs_bmap_free;
  82
  83 #define AIL_LOCK_T              lock_t
  84 #define AIL_LOCKINIT(x,y)       spinlock_init(x,y)
  85 #define AIL_LOCK_DESTROY(x)     spinlock_destroy(x)
  86 #define AIL_LOCK(mp,s)          s=mutex_spinlock(&(mp)->m_ail_lock)
  87 #define AIL_UNLOCK(mp,s)        mutex_spinunlock(&(mp)->m_ail_lock, s)
  88
  89
  90 /*
  91  * Prototypes and functions for the Data Migration subsystem.
  92  */
  93
  94 typedef int     (*xfs_send_data_t)(int, struct bhv_desc *,
  95                         xfs_off_t, size_t, int, vrwlock_t *);
  96 typedef int     (*xfs_send_mmap_t)(struct vm_area_struct *, uint);
  97 typedef int     (*xfs_send_destroy_t)(struct bhv_desc *, dm_right_t);
  98 typedef int     (*xfs_send_namesp_t)(dm_eventtype_t, struct bhv_desc *,
  99                         dm_right_t, struct bhv_desc *, dm_right_t,
 100                         char *, char *, mode_t, int, int);
 101 typedef void    (*xfs_send_unmount_t)(struct vfs *, struct vnode *,
 102                         dm_right_t, mode_t, int, int);
 103
 104 typedef struct xfs_dmops {
 105         xfs_send_data_t         xfs_send_data;
 106         xfs_send_mmap_t         xfs_send_mmap;
 107         xfs_send_destroy_t      xfs_send_destroy;
 108         xfs_send_namesp_t       xfs_send_namesp;
 109         xfs_send_unmount_t      xfs_send_unmount;
 110 } xfs_dmops_t;
 111
 112 #define XFS_SEND_DATA(mp, ev,bdp,off,len,fl,lock) \
 113         (*(mp)->m_dm_ops.xfs_send_data)(ev,bdp,off,len,fl,lock)
 114 #define XFS_SEND_MMAP(mp, vma,fl) \
 115         (*(mp)->m_dm_ops.xfs_send_mmap)(vma,fl)
 116 #define XFS_SEND_DESTROY(mp, bdp,right) \
 117         (*(mp)->m_dm_ops.xfs_send_destroy)(bdp,right)
 118 #define XFS_SEND_NAMESP(mp, ev,b1,r1,b2,r2,n1,n2,mode,rval,fl) \
 119         (*(mp)->m_dm_ops.xfs_send_namesp)(ev,b1,r1,b2,r2,n1,n2,mode,rval,fl)
 120 #define XFS_SEND_UNMOUNT(mp, vfsp,vp,right,mode,rval,fl) \
 121         (*(mp)->m_dm_ops.xfs_send_unmount)(vfsp,vp,right,mode,rval,fl)
 122
 123
 124 /*
 125  * Prototypes and functions for the Quota Management subsystem.
 126  */
 127
 128 struct xfs_dquot;
 129 struct xfs_dqtrxops;
 130 struct xfs_quotainfo;
 131
 132 typedef int     (*xfs_qminit_t)(struct xfs_mount *, uint *, uint *);
 133 typedef int     (*xfs_qmmount_t)(struct xfs_mount *, uint, uint);
 134 typedef int     (*xfs_qmunmount_t)(struct xfs_mount *);
 135 typedef void    (*xfs_qmdone_t)(struct xfs_mount *);
 136 typedef void    (*xfs_dqrele_t)(struct xfs_dquot *);
 137 typedef int     (*xfs_dqattach_t)(struct xfs_inode *, uint);
 138 typedef void    (*xfs_dqdetach_t)(struct xfs_inode *);
 139 typedef int     (*xfs_dqpurgeall_t)(struct xfs_mount *, uint);
 140 typedef int     (*xfs_dqvopalloc_t)(struct xfs_mount *,
 141                         struct xfs_inode *, uid_t, gid_t, uint,
 142                         struct xfs_dquot **, struct xfs_dquot **);
 143 typedef void    (*xfs_dqvopcreate_t)(struct xfs_trans *, struct xfs_inode *,
 144                         struct xfs_dquot *, struct xfs_dquot *);
 145 typedef int     (*xfs_dqvoprename_t)(struct xfs_inode **);
 146 typedef struct xfs_dquot * (*xfs_dqvopchown_t)(
 147                         struct xfs_trans *, struct xfs_inode *,
 148                         struct xfs_dquot **, struct xfs_dquot *);
 149 typedef int     (*xfs_dqvopchownresv_t)(struct xfs_trans *, struct xfs_inode *,
 150                         struct xfs_dquot *, struct xfs_dquot *, uint);
 151
 152 typedef struct xfs_qmops {
 153         xfs_qminit_t            xfs_qminit;
 154         xfs_qmdone_t            xfs_qmdone;
 155         xfs_qmmount_t           xfs_qmmount;
 156         xfs_qmunmount_t         xfs_qmunmount;
 157         xfs_dqrele_t            xfs_dqrele;
 158         xfs_dqattach_t          xfs_dqattach;
 159         xfs_dqdetach_t          xfs_dqdetach;
 160         xfs_dqpurgeall_t        xfs_dqpurgeall;
 161         xfs_dqvopalloc_t        xfs_dqvopalloc;
 162         xfs_dqvopcreate_t       xfs_dqvopcreate;
 163         xfs_dqvoprename_t       xfs_dqvoprename;
 164         xfs_dqvopchown_t        xfs_dqvopchown;
 165         xfs_dqvopchownresv_t    xfs_dqvopchownresv;
 166         struct xfs_dqtrxops     *xfs_dqtrxops;
 167 } xfs_qmops_t;
 168
 169 #define XFS_QM_INIT(mp, mnt, fl) \
 170         (*(mp)->m_qm_ops.xfs_qminit)(mp, mnt, fl)
 171 #define XFS_QM_MOUNT(mp, mnt, fl) \
 172         (*(mp)->m_qm_ops.xfs_qmmount)(mp, mnt, fl)
 173 #define XFS_QM_UNMOUNT(mp) \
 174         (*(mp)->m_qm_ops.xfs_qmunmount)(mp)
 175 #define XFS_QM_DONE(mp) \
 176         (*(mp)->m_qm_ops.xfs_qmdone)(mp)
 177 #define XFS_QM_DQRELE(mp, dq) \
 178         (*(mp)->m_qm_ops.xfs_dqrele)(dq)
 179 #define XFS_QM_DQATTACH(mp, ip, fl) \
 180         (*(mp)->m_qm_ops.xfs_dqattach)(ip, fl)
 181 #define XFS_QM_DQDETACH(mp, ip) \
 182         (*(mp)->m_qm_ops.xfs_dqdetach)(ip)
 183 #define XFS_QM_DQPURGEALL(mp, fl) \
 184         (*(mp)->m_qm_ops.xfs_dqpurgeall)(mp, fl)
 185 #define XFS_QM_DQVOPALLOC(mp, ip, uid, gid, fl, dq1, dq2) \
 186         (*(mp)->m_qm_ops.xfs_dqvopalloc)(mp, ip, uid, gid, fl, dq1, dq2)
 187 #define XFS_QM_DQVOPCREATE(mp, tp, ip, dq1, dq2) \
 188         (*(mp)->m_qm_ops.xfs_dqvopcreate)(tp, ip, dq1, dq2)
 189 #define XFS_QM_DQVOPRENAME(mp, ip) \
 190         (*(mp)->m_qm_ops.xfs_dqvoprename)(ip)
 191 #define XFS_QM_DQVOPCHOWN(mp, tp, ip, dqp, dq) \
 192         (*(mp)->m_qm_ops.xfs_dqvopchown)(tp, ip, dqp, dq)
 193 #define XFS_QM_DQVOPCHOWNRESV(mp, tp, ip, dq1, dq2, fl) \
 194         (*(mp)->m_qm_ops.xfs_dqvopchownresv)(tp, ip, dq1, dq2, fl)
 195
 196
 197 /*
 198  * Prototypes and functions for I/O core modularization.
 199  */
 200
 201 typedef int             (*xfs_ioinit_t)(struct vfs *,
 202                                 struct xfs_mount_args *, int);
 203 typedef int             (*xfs_bmapi_t)(struct xfs_trans *, void *,
 204                                 xfs_fileoff_t, xfs_filblks_t, int,
 205                                 xfs_fsblock_t *, xfs_extlen_t,
 206                                 struct xfs_bmbt_irec *, int *,
 207                                 struct xfs_bmap_free *);
 208 typedef int             (*xfs_bmap_eof_t)(void *, xfs_fileoff_t, int, int *);
 209 typedef int             (*xfs_iomap_write_direct_t)(
 210                                 void *, loff_t, size_t, int,
 211                                 struct xfs_bmbt_irec *, int *, int);
 212 typedef int             (*xfs_iomap_write_delay_t)(
 213                                 void *, loff_t, size_t, int,
 214                                 struct xfs_bmbt_irec *, int *);
 215 typedef int             (*xfs_iomap_write_allocate_t)(
 216                                 void *, struct xfs_bmbt_irec *, int *);
 217 typedef int             (*xfs_iomap_write_unwritten_t)(
 218                                 void *, loff_t, size_t);
 219 typedef uint            (*xfs_lck_map_shared_t)(void *);
 220 typedef void            (*xfs_lock_t)(void *, uint);
 221 typedef void            (*xfs_lock_demote_t)(void *, uint);
 222 typedef int             (*xfs_lock_nowait_t)(void *, uint);
 223 typedef void            (*xfs_unlk_t)(void *, unsigned int);
 224 typedef xfs_fsize_t     (*xfs_size_t)(void *);
 225 typedef xfs_fsize_t     (*xfs_iodone_t)(struct vfs *);
 226
 227 typedef struct xfs_ioops {
 228         xfs_ioinit_t                    xfs_ioinit;
 229         xfs_bmapi_t                     xfs_bmapi_func;
 230         xfs_bmap_eof_t                  xfs_bmap_eof_func;
 231         xfs_iomap_write_direct_t        xfs_iomap_write_direct;
 232         xfs_iomap_write_delay_t         xfs_iomap_write_delay;
 233         xfs_iomap_write_allocate_t      xfs_iomap_write_allocate;
 234         xfs_iomap_write_unwritten_t     xfs_iomap_write_unwritten;
 235         xfs_lock_t                      xfs_ilock;
 236         xfs_lck_map_shared_t            xfs_lck_map_shared;
 237         xfs_lock_demote_t               xfs_ilock_demote;
 238         xfs_lock_nowait_t               xfs_ilock_nowait;
 239         xfs_unlk_t                      xfs_unlock;
 240         xfs_size_t                      xfs_size_func;
 241         xfs_iodone_t                    xfs_iodone;
 242 } xfs_ioops_t;
 243
 244 #define XFS_IOINIT(vfsp, args, flags) \
 245         (*(mp)->m_io_ops.xfs_ioinit)(vfsp, args, flags)
 246 #define XFS_BMAPI(mp, trans,io,bno,len,f,first,tot,mval,nmap,flist)     \
 247         (*(mp)->m_io_ops.xfs_bmapi_func) \
 248                 (trans,(io)->io_obj,bno,len,f,first,tot,mval,nmap,flist)
 249 #define XFS_BMAP_EOF(mp, io, endoff, whichfork, eof) \
 250         (*(mp)->m_io_ops.xfs_bmap_eof_func) \
 251                 ((io)->io_obj, endoff, whichfork, eof)
 252 #define XFS_IOMAP_WRITE_DIRECT(mp, io, offset, count, flags, mval, nmap, found)\
 253         (*(mp)->m_io_ops.xfs_iomap_write_direct) \
 254                 ((io)->io_obj, offset, count, flags, mval, nmap, found)
 255 #define XFS_IOMAP_WRITE_DELAY(mp, io, offset, count, flags, mval, nmap) \
 256         (*(mp)->m_io_ops.xfs_iomap_write_delay) \
 257                 ((io)->io_obj, offset, count, flags, mval, nmap)
 258 #define XFS_IOMAP_WRITE_ALLOCATE(mp, io, mval, nmap) \
 259         (*(mp)->m_io_ops.xfs_iomap_write_allocate) \
 260                 ((io)->io_obj, mval, nmap)
 261 #define XFS_IOMAP_WRITE_UNWRITTEN(mp, io, offset, count) \
 262         (*(mp)->m_io_ops.xfs_iomap_write_unwritten) \
 263                 ((io)->io_obj, offset, count)
 264 #define XFS_LCK_MAP_SHARED(mp, io) \
 265         (*(mp)->m_io_ops.xfs_lck_map_shared)((io)->io_obj)
 266 #define XFS_ILOCK(mp, io, mode) \
 267         (*(mp)->m_io_ops.xfs_ilock)((io)->io_obj, mode)
 268 #define XFS_ILOCK_NOWAIT(mp, io, mode) \
 269         (*(mp)->m_io_ops.xfs_ilock_nowait)((io)->io_obj, mode)
 270 #define XFS_IUNLOCK(mp, io, mode) \
 271         (*(mp)->m_io_ops.xfs_unlock)((io)->io_obj, mode)
 272 #define XFS_ILOCK_DEMOTE(mp, io, mode) \
 273         (*(mp)->m_io_ops.xfs_ilock_demote)((io)->io_obj, mode)
 274 #define XFS_SIZE(mp, io) \
 275         (*(mp)->m_io_ops.xfs_size_func)((io)->io_obj)
 276 #define XFS_IODONE(vfsp) \
 277         (*(mp)->m_io_ops.xfs_iodone)(vfsp)
 278
 279
 280 typedef struct xfs_mount {
 281         bhv_desc_t              m_bhv;          /* vfs xfs behavior */
 282         xfs_tid_t               m_tid;          /* next unused tid for fs */
 283         AIL_LOCK_T              m_ail_lock;     /* fs AIL mutex */
 284         xfs_ail_entry_t         m_ail;          /* fs active log item list */
 285         uint                    m_ail_gen;      /* fs AIL generation count */
 286         xfs_sb_t                m_sb;           /* copy of fs superblock */
 287         lock_t                  m_sb_lock;      /* sb counter mutex */
 288         struct xfs_buf          *m_sb_bp;       /* buffer for superblock */
 289         char                    *m_fsname;      /* filesystem name */
 290         int                     m_fsname_len;   /* strlen of fs name */
 291         int                     m_bsize;        /* fs logical block size */
 292         xfs_agnumber_t          m_agfrotor;     /* last ag where space found */
 293         xfs_agnumber_t          m_agirotor;     /* last ag dir inode alloced */
 294         lock_t                  m_agirotor_lock;/* .. and lock protecting it */
 295         xfs_agnumber_t          m_maxagi;       /* highest inode alloc group */
 296         int                     m_ihsize;       /* size of next field */
 297         struct xfs_ihash        *m_ihash;       /* fs private inode hash table*/
 298         struct xfs_inode        *m_inodes;      /* active inode list */
 299         struct list_head        m_del_inodes;   /* inodes to reclaim */
 300         mutex_t                 m_ilock;        /* inode list mutex */
 301         uint                    m_ireclaims;    /* count of calls to reclaim*/
 302         uint                    m_readio_log;   /* min read size log bytes */
 303         uint                    m_readio_blocks; /* min read size blocks */
 304         uint                    m_writeio_log;  /* min write size log bytes */
 305         uint                    m_writeio_blocks; /* min write size blocks */
 306         struct log              *m_log;         /* log specific stuff */
 307         int                     m_logbufs;      /* number of log buffers */
 308         int                     m_logbsize;     /* size of each log buffer */
 309         uint                    m_rsumlevels;   /* rt summary levels */
 310         uint                    m_rsumsize;     /* size of rt summary, bytes */
 311         struct xfs_inode        *m_rbmip;       /* pointer to bitmap inode */
 312         struct xfs_inode        *m_rsumip;      /* pointer to summary inode */
 313         struct xfs_inode        *m_rootip;      /* pointer to root directory */
 314         struct xfs_quotainfo    *m_quotainfo;   /* disk quota information */
 315         xfs_buftarg_t           *m_ddev_targp;  /* saves taking the address */
 316         xfs_buftarg_t           *m_logdev_targp;/* ptr to log device */
 317         xfs_buftarg_t           *m_rtdev_targp; /* ptr to rt device */
 318 #define m_dev           m_ddev_targp->pbr_dev
 319         __uint8_t               m_dircook_elog; /* log d-cookie entry bits */
 320         __uint8_t               m_blkbit_log;   /* blocklog + NBBY */
 321         __uint8_t               m_blkbb_log;    /* blocklog - BBSHIFT */
 322         __uint8_t               m_agno_log;     /* log #ag's */
 323         __uint8_t               m_agino_log;    /* #bits for agino in inum */
 324         __uint8_t               m_nreadaheads;  /* #readahead buffers */
 325         __uint16_t              m_inode_cluster_size;/* min inode buf size */
 326         uint                    m_blockmask;    /* sb_blocksize-1 */
 327         uint                    m_blockwsize;   /* sb_blocksize in words */
 328         uint                    m_blockwmask;   /* blockwsize-1 */
 329         uint                    m_alloc_mxr[2]; /* XFS_ALLOC_BLOCK_MAXRECS */
 330         uint                    m_alloc_mnr[2]; /* XFS_ALLOC_BLOCK_MINRECS */
 331         uint                    m_bmap_dmxr[2]; /* XFS_BMAP_BLOCK_DMAXRECS */
 332         uint                    m_bmap_dmnr[2]; /* XFS_BMAP_BLOCK_DMINRECS */
 333         uint                    m_inobt_mxr[2]; /* XFS_INOBT_BLOCK_MAXRECS */
 334         uint                    m_inobt_mnr[2]; /* XFS_INOBT_BLOCK_MINRECS */
 335         uint                    m_ag_maxlevels; /* XFS_AG_MAXLEVELS */
 336         uint                    m_bm_maxlevels[2]; /* XFS_BM_MAXLEVELS */
 337         uint                    m_in_maxlevels; /* XFS_IN_MAXLEVELS */
 338         struct xfs_perag        *m_perag;       /* per-ag accounting info */
 339         struct rw_semaphore     m_peraglock;    /* lock for m_perag (pointer) */
 340         sema_t                  m_growlock;     /* growfs mutex */
 341         int                     m_fixedfsid[2]; /* unchanged for life of FS */
 342         uint                    m_dmevmask;     /* DMI events for this FS */
 343         uint                    m_flags;        /* global mount flags */
 344         uint                    m_attroffset;   /* inode attribute offset */
 345         uint                    m_dir_node_ents; /* #entries in a dir danode */
 346         uint                    m_attr_node_ents; /* #entries in attr danode */
 347         int                     m_ialloc_inos;  /* inodes in inode allocation */
 348         int                     m_ialloc_blks;  /* blocks in inode allocation */
 349         int                     m_litino;       /* size of inode union area */
 350         int                     m_inoalign_mask;/* mask sb_inoalignmt if used */
 351         uint                    m_qflags;       /* quota status flags */
 352         xfs_trans_reservations_t m_reservations;/* precomputed res values */
 353         __uint64_t              m_maxicount;    /* maximum inode count */
 354         __uint64_t              m_maxioffset;   /* maximum inode offset */
 355         __uint64_t              m_resblks;      /* total reserved blocks */
 356         __uint64_t              m_resblks_avail;/* available reserved blocks */
 357 #if XFS_BIG_FILESYSTEMS
 358         xfs_ino_t               m_inoadd;       /* add value for ino64_offset */
 359 #endif
 360         int                     m_dalign;       /* stripe unit */
 361         int                     m_swidth;       /* stripe width */
 362         int                     m_sinoalign;    /* stripe unit inode alignmnt */
 363         int                     m_attr_magicpct;/* 37% of the blocksize */
 364         int                     m_dir_magicpct; /* 37% of the dir blocksize */
 365         __uint8_t               m_mk_sharedro;  /* mark shared ro on unmount */
 366         __uint8_t               m_inode_quiesce;/* call quiesce on new inodes.
 367                                                    field governed by m_ilock */
 368         __uint8_t               m_sectbb_log;   /* sectlog - BBSHIFT */
 369         __uint8_t               m_dirversion;   /* 1 or 2 */
 370         xfs_dirops_t            m_dirops;       /* table of dir funcs */
 371         int                     m_dirblksize;   /* directory block sz--bytes */
 372         int                     m_dirblkfsbs;   /* directory block sz--fsbs */
 373         xfs_dablk_t             m_dirdatablk;   /* blockno of dir data v2 */
 374         xfs_dablk_t             m_dirleafblk;   /* blockno of dir non-data v2 */
 375         xfs_dablk_t             m_dirfreeblk;   /* blockno of dirfreeindex v2 */
 376         int                     m_chsize;       /* size of next field */
 377         struct xfs_chash        *m_chash;       /* fs private inode per-cluster
 378                                                  * hash table */
 379         struct xfs_dmops        m_dm_ops;       /* vector of DMI ops */
 380         struct xfs_qmops        m_qm_ops;       /* vector of XQM ops */
 381         struct xfs_ioops        m_io_ops;       /* vector of I/O ops */
 382         lock_t                  m_freeze_lock;  /* Lock for m_frozen */
 383         uint                    m_frozen;       /* FS frozen for shutdown or
 384                                                  * snapshot */
 385         sv_t                    m_wait_unfreeze;/* waiting to unfreeze */
 386         atomic_t                m_active_trans; /* number trans frozen */
 387 } xfs_mount_t;
 388
 389 /*
 390  * Flags for m_flags.
 391  */
 392 #define XFS_MOUNT_WSYNC         0x00000001      /* for nfs - all metadata ops
 393                                                    must be synchronous except
 394                                                    for space allocations */
 395 #if XFS_BIG_FILESYSTEMS
 396 #define XFS_MOUNT_INO64         0x00000002
 397 #endif
 398                              /* 0x00000004      -- currently unused */
 399                              /* 0x00000008      -- currently unused */
 400 #define XFS_MOUNT_FS_SHUTDOWN   0x00000010      /* atomic stop of all filesystem
 401                                                    operations, typically for
 402                                                    disk errors in metadata */
 403 #define XFS_MOUNT_NOATIME       0x00000020      /* don't modify inode access
 404                                                    times on reads */
 405 #define XFS_MOUNT_RETERR        0x00000040      /* return alignment errors to
 406                                                    user */
 407 #define XFS_MOUNT_NOALIGN       0x00000080      /* turn off stripe alignment
 408                                                    allocations */
 409                              /* 0x00000100      -- currently unused */
 410                              /* 0x00000200      -- currently unused */
 411 #define XFS_MOUNT_NORECOVERY    0x00000400      /* no recovery - dirty fs */
 412 #define XFS_MOUNT_SHARED        0x00000800      /* shared mount */
 413 #define XFS_MOUNT_DFLT_IOSIZE   0x00001000      /* set default i/o size */
 414 #define XFS_MOUNT_OSYNCISOSYNC  0x00002000      /* o_sync is REALLY o_sync */
 415                                                 /* osyncisdsync is now default*/
 416 #define XFS_MOUNT_NOUUID        0x00004000      /* ignore uuid during mount */
 417 #define XFS_MOUNT_32BITINODES   0x00008000      /* do not create inodes above
 418                                                  * 32 bits in size */
 419 #define XFS_MOUNT_NOLOGFLUSH    0x00010000
 420
 421 /*
 422  * Default minimum read and write sizes.
 423  */
 424 #define XFS_READIO_LOG_LARGE    16
 425 #define XFS_WRITEIO_LOG_LARGE   16
 426 /*
 427  * Default allocation size
 428  */
 429 #define XFS_WRITE_IO_LOG        16
 430
 431 /*
 432  * Max and min values for UIO and mount-option defined I/O sizes;
 433  * min value can't be less than a page.  Currently unused.
 434  */
 435 #define XFS_MAX_IO_LOG          16      /* 64K */
 436 #define XFS_MIN_IO_LOG          PAGE_SHIFT
 437
 438 /*
 439  * Synchronous read and write sizes.  This should be
 440  * better for NFSv2 wsync filesystems.
 441  */
 442 #define XFS_WSYNC_READIO_LOG    15      /* 32K */
 443 #define XFS_WSYNC_WRITEIO_LOG   14      /* 16K */
 444
 445 #define XFS_MAXIOFFSET(mp)      ((mp)->m_maxioffset)
 446
 447 #define XFS_FORCED_SHUTDOWN(mp) ((mp)->m_flags & XFS_MOUNT_FS_SHUTDOWN)
 448 #define xfs_force_shutdown(m,f) \
 449         VFS_FORCE_SHUTDOWN((XFS_MTOVFS(m)), f, __FILE__, __LINE__)
 450
 451 /*
 452  * Flags sent to xfs_force_shutdown.
 453  */
 454 #define XFS_METADATA_IO_ERROR   0x1
 455 #define XFS_LOG_IO_ERROR        0x2
 456 #define XFS_FORCE_UMOUNT        0x4
 457 #define XFS_CORRUPT_INCORE      0x8     /* Corrupt in-memory data structures */
 458 #define XFS_SHUTDOWN_REMOTE_REQ 0x10    /* Shutdown came from remote cell */
 459
 460 /*
 461  * xflags for xfs_syncsub
 462  */
 463 #define XFS_XSYNC_RELOC         0x01
 464
 465 /*
 466  * Flags for xfs_mountfs
 467  */
 468 #define XFS_MFSI_SECOND         0x01    /* Secondary mount -- skip stuff */
 469 #define XFS_MFSI_CLIENT         0x02    /* Is a client -- skip lots of stuff */
 470 #define XFS_MFSI_NOUNLINK       0x08    /* Skip unlinked inode processing in */
 471                                         /* log recovery */
 472
 473 /*
 474  * Macros for getting from mount to vfs and back.
 475  */
 476 #if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_MTOVFS)
 477 struct vfs *xfs_mtovfs(xfs_mount_t *mp);
 478 #define XFS_MTOVFS(mp)          xfs_mtovfs(mp)
 479 #else
 480 #define XFS_MTOVFS(mp)          (bhvtovfs(&(mp)->m_bhv))
 481 #endif
 482 #if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_BHVTOM)
 483 xfs_mount_t *xfs_bhvtom(bhv_desc_t *bdp);
 484 #define XFS_BHVTOM(bdp) xfs_bhvtom(bdp)
 485 #else
 486 #define XFS_BHVTOM(bdp)         ((xfs_mount_t *)BHV_PDATA(bdp))
 487 #endif
 488 #if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_VFSTOM)
 489 xfs_mount_t *xfs_vfstom(vfs_t *vfs);
 490 #define XFS_VFSTOM(vfs) xfs_vfstom(vfs)
 491 #else
 492 #define XFS_VFSTOM(vfs)         \
 493         (XFS_BHVTOM(bhv_lookup(VFS_BHVHEAD(vfs), &xfs_vfsops)))
 494 #endif
 495
 496
 497 /*
 498  * Moved here from xfs_ag.h to avoid reordering header files
 499  */
 500
 501 #if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DADDR_TO_AGNO)
 502 xfs_agnumber_t xfs_daddr_to_agno(struct xfs_mount *mp, xfs_daddr_t d);
 503 #define XFS_DADDR_TO_AGNO(mp,d)         xfs_daddr_to_agno(mp,d)
 504 #else
 505
 506 static inline xfs_agnumber_t XFS_DADDR_TO_AGNO(xfs_mount_t *mp, xfs_daddr_t d)
 507 {
 508         d = XFS_BB_TO_FSBT(mp, d);
 509         do_div(d, mp->m_sb.sb_agblocks);
 510         return (xfs_agnumber_t) d;
 511 }
 512
 513 #endif
 514 #if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DADDR_TO_AGBNO)
 515 xfs_agblock_t xfs_daddr_to_agbno(struct xfs_mount *mp, xfs_daddr_t d);
 516 #define XFS_DADDR_TO_AGBNO(mp,d)        xfs_daddr_to_agbno(mp,d)
 517 #else
 518
 519 static inline xfs_agblock_t XFS_DADDR_TO_AGBNO(xfs_mount_t *mp, xfs_daddr_t d)
 520 {
 521         d = XFS_BB_TO_FSBT(mp, d);
 522         return (xfs_agblock_t) do_div(d, mp->m_sb.sb_agblocks);
 523 }
 524
 525 #endif
 526
 527 /*
 528  * This structure is for use by the xfs_mod_incore_sb_batch() routine.
 529  */
 530 typedef struct xfs_mod_sb {
 531         xfs_sb_field_t  msb_field;      /* Field to modify, see below */
 532         int             msb_delta;      /* Change to make to specified field */
 533 } xfs_mod_sb_t;
 534
 535 #define XFS_MOUNT_ILOCK(mp)     mutex_lock(&((mp)->m_ilock), PINOD)
 536 #define XFS_MOUNT_IUNLOCK(mp)   mutex_unlock(&((mp)->m_ilock))
 537 #define XFS_SB_LOCK(mp)         mutex_spinlock(&(mp)->m_sb_lock)
 538 #define XFS_SB_UNLOCK(mp,s)     mutex_spinunlock(&(mp)->m_sb_lock,(s))
 539
 540 extern xfs_mount_t *xfs_mount_init(void);
 541 extern void     xfs_mod_sb(xfs_trans_t *, __int64_t);
 542 extern void     xfs_mount_free(xfs_mount_t *mp, int remove_bhv);
 543 extern int      xfs_mountfs(struct vfs *, xfs_mount_t *mp, int);
 544
 545 extern int      xfs_unmountfs(xfs_mount_t *, struct cred *);
 546 extern void     xfs_unmountfs_close(xfs_mount_t *, struct cred *);
 547 extern int      xfs_unmountfs_writesb(xfs_mount_t *);
 548 extern int      xfs_unmount_flush(xfs_mount_t *, int);
 549 extern int      xfs_mod_incore_sb(xfs_mount_t *, xfs_sb_field_t, int, int);
 550 extern int      xfs_mod_incore_sb_batch(xfs_mount_t *, xfs_mod_sb_t *,
 551                         uint, int);
 552 extern struct xfs_buf *xfs_getsb(xfs_mount_t *, int);
 553 extern int      xfs_readsb(xfs_mount_t *mp);
 554 extern void     xfs_freesb(xfs_mount_t *);
 555 extern void     xfs_do_force_shutdown(bhv_desc_t *, int, char *, int);
 556 extern int      xfs_syncsub(xfs_mount_t *, int, int, int *);
 557 extern void     xfs_initialize_perag(xfs_mount_t *, int);
 558 extern void     xfs_xlatesb(void *, struct xfs_sb *, int, xfs_arch_t,
 559                         __int64_t);
 560
 561 /*
 562  * Flags for freeze operations.
 563  */
 564 #define XFS_FREEZE_WRITE        1
 565 #define XFS_FREEZE_TRANS        2
 566
 567 extern void     xfs_start_freeze(xfs_mount_t *, int);
 568 extern void     xfs_finish_freeze(xfs_mount_t *);
 569 extern void     xfs_check_frozen(xfs_mount_t *, bhv_desc_t *, int);
 570
 571 extern struct vfsops xfs_vfsops;
 572 extern struct vnodeops xfs_vnodeops;
 573
 574 extern struct xfs_dmops xfs_dmcore_xfs;
 575 extern struct xfs_qmops xfs_qmcore_xfs;
 576 extern struct xfs_ioops xfs_iocore_xfs;
 577
 578 extern int      xfs_init(void);
 579 extern void     xfs_cleanup(void);
 580
 581 #endif  /* __KERNEL__ */
 582
 583 #endif  /* __XFS_MOUNT_H__ */