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