fs/xfs/xfs_mount.h

   1 /*
   2  * Copyright (c) 2000-2005 Silicon Graphics, Inc.
   3  * All Rights Reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it would be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write the Free Software Foundation,
  16  * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  17  */
  18 #ifndef __XFS_MOUNT_H__
  19 #define __XFS_MOUNT_H__
  20
  21
  22 typedef struct xfs_trans_reservations {
  23         uint    tr_write;       /* extent alloc trans */
  24         uint    tr_itruncate;   /* truncate trans */
  25         uint    tr_rename;      /* rename trans */
  26         uint    tr_link;        /* link trans */
  27         uint    tr_remove;      /* unlink trans */
  28         uint    tr_symlink;     /* symlink trans */
  29         uint    tr_create;      /* create trans */
  30         uint    tr_mkdir;       /* mkdir trans */
  31         uint    tr_ifree;       /* inode free trans */
  32         uint    tr_ichange;     /* inode update trans */
  33         uint    tr_growdata;    /* fs data section grow trans */
  34         uint    tr_swrite;      /* sync write inode trans */
  35         uint    tr_addafork;    /* cvt inode to attributed trans */
  36         uint    tr_writeid;     /* write setuid/setgid file */
  37         uint    tr_attrinval;   /* attr fork buffer invalidation */
  38         uint    tr_attrset;     /* set/create an attribute */
  39         uint    tr_attrrm;      /* remove an attribute */
  40         uint    tr_clearagi;    /* clear bad agi unlinked ino bucket */
  41         uint    tr_growrtalloc; /* grow realtime allocations */
  42         uint    tr_growrtzero;  /* grow realtime zeroing */
  43         uint    tr_growrtfree;  /* grow realtime freeing */
  44 } xfs_trans_reservations_t;
  45
  46 #ifndef __KERNEL__
  47 /*
  48  * Moved here from xfs_ag.h to avoid reordering header files
  49  */
  50 #define XFS_DADDR_TO_AGNO(mp,d) \
  51         ((xfs_agnumber_t)(XFS_BB_TO_FSBT(mp, d) / (mp)->m_sb.sb_agblocks))
  52 #define XFS_DADDR_TO_AGBNO(mp,d) \
  53         ((xfs_agblock_t)(XFS_BB_TO_FSBT(mp, d) % (mp)->m_sb.sb_agblocks))
  54 #else
  55 struct cred;
  56 struct log;
  57 struct xfs_mount_args;
  58 struct xfs_inode;
  59 struct xfs_iocore;
  60 struct xfs_bmbt_irec;
  61 struct xfs_bmap_free;
  62 struct xfs_extdelta;
  63 struct xfs_swapext;
  64 struct xfs_mru_cache;
  65
  66 #define AIL_LOCK_T              lock_t
  67 #define AIL_LOCKINIT(x,y)       spinlock_init(x,y)
  68 #define AIL_LOCK_DESTROY(x)     spinlock_destroy(x)
  69 #define AIL_LOCK(mp,s)          s=mutex_spinlock(&(mp)->m_ail_lock)
  70 #define AIL_UNLOCK(mp,s)        mutex_spinunlock(&(mp)->m_ail_lock, s)
  71
  72
  73 /*
  74  * Prototypes and functions for the Data Migration subsystem.
  75  */
  76
  77 typedef int     (*xfs_send_data_t)(int, bhv_vnode_t *,
  78                         xfs_off_t, size_t, int, bhv_vrwlock_t *);
  79 typedef int     (*xfs_send_mmap_t)(struct vm_area_struct *, uint);
  80 typedef int     (*xfs_send_destroy_t)(bhv_vnode_t *, dm_right_t);
  81 typedef int     (*xfs_send_namesp_t)(dm_eventtype_t, struct xfs_mount *,
  82                         bhv_vnode_t *,
  83                         dm_right_t, bhv_vnode_t *, dm_right_t,
  84                         char *, char *, mode_t, int, int);
  85 typedef int     (*xfs_send_mount_t)(struct xfs_mount *, dm_right_t,
  86                         char *, char *);
  87 typedef void    (*xfs_send_unmount_t)(struct xfs_mount *, bhv_vnode_t *,
  88                         dm_right_t, mode_t, int, int);
  89
  90 typedef struct xfs_dmops {
  91         xfs_send_data_t         xfs_send_data;
  92         xfs_send_mmap_t         xfs_send_mmap;
  93         xfs_send_destroy_t      xfs_send_destroy;
  94         xfs_send_namesp_t       xfs_send_namesp;
  95         xfs_send_mount_t        xfs_send_mount;
  96         xfs_send_unmount_t      xfs_send_unmount;
  97 } xfs_dmops_t;
  98
  99 #define XFS_SEND_DATA(mp, ev,vp,off,len,fl,lock) \
 100         (*(mp)->m_dm_ops->xfs_send_data)(ev,vp,off,len,fl,lock)
 101 #define XFS_SEND_MMAP(mp, vma,fl) \
 102         (*(mp)->m_dm_ops->xfs_send_mmap)(vma,fl)
 103 #define XFS_SEND_DESTROY(mp, vp,right) \
 104         (*(mp)->m_dm_ops->xfs_send_destroy)(vp,right)
 105 #define XFS_SEND_NAMESP(mp, ev,b1,r1,b2,r2,n1,n2,mode,rval,fl) \
 106         (*(mp)->m_dm_ops->xfs_send_namesp)(ev,NULL,b1,r1,b2,r2,n1,n2,mode,rval,fl)
 107 #define XFS_SEND_PREUNMOUNT(mp,b1,r1,b2,r2,n1,n2,mode,rval,fl) \
 108         (*(mp)->m_dm_ops->xfs_send_namesp)(DM_EVENT_PREUNMOUNT,mp,b1,r1,b2,r2,n1,n2,mode,rval,fl)
 109 #define XFS_SEND_MOUNT(mp,right,path,name) \
 110         (*(mp)->m_dm_ops->xfs_send_mount)(mp,right,path,name)
 111 #define XFS_SEND_UNMOUNT(mp, vp,right,mode,rval,fl) \
 112         (*(mp)->m_dm_ops->xfs_send_unmount)(mp,vp,right,mode,rval,fl)
 113
 114
 115 /*
 116  * Prototypes and functions for the Quota Management subsystem.
 117  */
 118
 119 struct xfs_dquot;
 120 struct xfs_dqtrxops;
 121 struct xfs_quotainfo;
 122
 123 typedef int     (*xfs_qminit_t)(struct xfs_mount *, uint *, uint *);
 124 typedef int     (*xfs_qmmount_t)(struct xfs_mount *, uint, uint, int);
 125 typedef int     (*xfs_qmunmount_t)(struct xfs_mount *);
 126 typedef void    (*xfs_qmdone_t)(struct xfs_mount *);
 127 typedef void    (*xfs_dqrele_t)(struct xfs_dquot *);
 128 typedef int     (*xfs_dqattach_t)(struct xfs_inode *, uint);
 129 typedef void    (*xfs_dqdetach_t)(struct xfs_inode *);
 130 typedef int     (*xfs_dqpurgeall_t)(struct xfs_mount *, uint);
 131 typedef int     (*xfs_dqvopalloc_t)(struct xfs_mount *,
 132                         struct xfs_inode *, uid_t, gid_t, prid_t, uint,
 133                         struct xfs_dquot **, struct xfs_dquot **);
 134 typedef void    (*xfs_dqvopcreate_t)(struct xfs_trans *, struct xfs_inode *,
 135                         struct xfs_dquot *, struct xfs_dquot *);
 136 typedef int     (*xfs_dqvoprename_t)(struct xfs_inode **);
 137 typedef struct xfs_dquot * (*xfs_dqvopchown_t)(
 138                         struct xfs_trans *, struct xfs_inode *,
 139                         struct xfs_dquot **, struct xfs_dquot *);
 140 typedef int     (*xfs_dqvopchownresv_t)(struct xfs_trans *, struct xfs_inode *,
 141                         struct xfs_dquot *, struct xfs_dquot *, uint);
 142 typedef void    (*xfs_dqstatvfs_t)(struct xfs_inode *, bhv_statvfs_t *);
 143 typedef int     (*xfs_dqsync_t)(struct xfs_mount *, int flags);
 144 typedef int     (*xfs_quotactl_t)(struct xfs_mount *, int, int, xfs_caddr_t);
 145
 146 typedef struct xfs_qmops {
 147         xfs_qminit_t            xfs_qminit;
 148         xfs_qmdone_t            xfs_qmdone;
 149         xfs_qmmount_t           xfs_qmmount;
 150         xfs_qmunmount_t         xfs_qmunmount;
 151         xfs_dqrele_t            xfs_dqrele;
 152         xfs_dqattach_t          xfs_dqattach;
 153         xfs_dqdetach_t          xfs_dqdetach;
 154         xfs_dqpurgeall_t        xfs_dqpurgeall;
 155         xfs_dqvopalloc_t        xfs_dqvopalloc;
 156         xfs_dqvopcreate_t       xfs_dqvopcreate;
 157         xfs_dqvoprename_t       xfs_dqvoprename;
 158         xfs_dqvopchown_t        xfs_dqvopchown;
 159         xfs_dqvopchownresv_t    xfs_dqvopchownresv;
 160         xfs_dqstatvfs_t         xfs_dqstatvfs;
 161         xfs_dqsync_t            xfs_dqsync;
 162         xfs_quotactl_t          xfs_quotactl;
 163         struct xfs_dqtrxops     *xfs_dqtrxops;
 164 } xfs_qmops_t;
 165
 166 #define XFS_QM_INIT(mp, mnt, fl) \
 167         (*(mp)->m_qm_ops->xfs_qminit)(mp, mnt, fl)
 168 #define XFS_QM_MOUNT(mp, mnt, fl, mfsi_flags) \
 169         (*(mp)->m_qm_ops->xfs_qmmount)(mp, mnt, fl, mfsi_flags)
 170 #define XFS_QM_UNMOUNT(mp) \
 171         (*(mp)->m_qm_ops->xfs_qmunmount)(mp)
 172 #define XFS_QM_DONE(mp) \
 173         (*(mp)->m_qm_ops->xfs_qmdone)(mp)
 174 #define XFS_QM_DQRELE(mp, dq) \
 175         (*(mp)->m_qm_ops->xfs_dqrele)(dq)
 176 #define XFS_QM_DQATTACH(mp, ip, fl) \
 177         (*(mp)->m_qm_ops->xfs_dqattach)(ip, fl)
 178 #define XFS_QM_DQDETACH(mp, ip) \
 179         (*(mp)->m_qm_ops->xfs_dqdetach)(ip)
 180 #define XFS_QM_DQPURGEALL(mp, fl) \
 181         (*(mp)->m_qm_ops->xfs_dqpurgeall)(mp, fl)
 182 #define XFS_QM_DQVOPALLOC(mp, ip, uid, gid, prid, fl, dq1, dq2) \
 183         (*(mp)->m_qm_ops->xfs_dqvopalloc)(mp, ip, uid, gid, prid, fl, dq1, dq2)
 184 #define XFS_QM_DQVOPCREATE(mp, tp, ip, dq1, dq2) \
 185         (*(mp)->m_qm_ops->xfs_dqvopcreate)(tp, ip, dq1, dq2)
 186 #define XFS_QM_DQVOPRENAME(mp, ip) \
 187         (*(mp)->m_qm_ops->xfs_dqvoprename)(ip)
 188 #define XFS_QM_DQVOPCHOWN(mp, tp, ip, dqp, dq) \
 189         (*(mp)->m_qm_ops->xfs_dqvopchown)(tp, ip, dqp, dq)
 190 #define XFS_QM_DQVOPCHOWNRESV(mp, tp, ip, dq1, dq2, fl) \
 191         (*(mp)->m_qm_ops->xfs_dqvopchownresv)(tp, ip, dq1, dq2, fl)
 192 #define XFS_QM_DQSTATVFS(ip, statp) \
 193         (*(ip)->i_mount->m_qm_ops->xfs_dqstatvfs)(ip, statp)
 194 #define XFS_QM_DQSYNC(mp, flags) \
 195         (*(mp)->m_qm_ops->xfs_dqsync)(mp, flags)
 196 #define XFS_QM_QUOTACTL(mp, cmd, id, addr) \
 197         (*(mp)->m_qm_ops->xfs_quotactl)(mp, cmd, id, addr)
 198
 199
 200 /*
 201  * Prototypes and functions for I/O core modularization.
 202  */
 203
 204 typedef int             (*xfs_ioinit_t)(struct xfs_mount *,
 205                                 struct xfs_mount_args *, int);
 206 typedef int             (*xfs_bmapi_t)(struct xfs_trans *, void *,
 207                                 xfs_fileoff_t, xfs_filblks_t, int,
 208                                 xfs_fsblock_t *, xfs_extlen_t,
 209                                 struct xfs_bmbt_irec *, int *,
 210                                 struct xfs_bmap_free *, struct xfs_extdelta *);
 211 typedef int             (*xfs_bunmapi_t)(struct xfs_trans *,
 212                                 void *, xfs_fileoff_t,
 213                                 xfs_filblks_t, int, xfs_extnum_t,
 214                                 xfs_fsblock_t *, struct xfs_bmap_free *,
 215                                 struct xfs_extdelta *, int *);
 216 typedef int             (*xfs_bmap_eof_t)(void *, xfs_fileoff_t, int, int *);
 217 typedef int             (*xfs_iomap_write_direct_t)(
 218                                 void *, xfs_off_t, size_t, int,
 219                                 struct xfs_bmbt_irec *, int *, int);
 220 typedef int             (*xfs_iomap_write_delay_t)(
 221                                 void *, xfs_off_t, size_t, int,
 222                                 struct xfs_bmbt_irec *, int *);
 223 typedef int             (*xfs_iomap_write_allocate_t)(
 224                                 void *, xfs_off_t, size_t,
 225                                 struct xfs_bmbt_irec *, int *);
 226 typedef int             (*xfs_iomap_write_unwritten_t)(
 227                                 void *, xfs_off_t, size_t);
 228 typedef uint            (*xfs_lck_map_shared_t)(void *);
 229 typedef void            (*xfs_lock_t)(void *, uint);
 230 typedef void            (*xfs_lock_demote_t)(void *, uint);
 231 typedef int             (*xfs_lock_nowait_t)(void *, uint);
 232 typedef void            (*xfs_unlk_t)(void *, unsigned int);
 233 typedef xfs_fsize_t     (*xfs_size_t)(void *);
 234 typedef xfs_fsize_t     (*xfs_iodone_t)(struct xfs_mount *);
 235 typedef int             (*xfs_swap_extents_t)(void *, void *,
 236                                 struct xfs_swapext*);
 237
 238 typedef struct xfs_ioops {
 239         xfs_ioinit_t                    xfs_ioinit;
 240         xfs_bmapi_t                     xfs_bmapi_func;
 241         xfs_bunmapi_t                   xfs_bunmapi_func;
 242         xfs_bmap_eof_t                  xfs_bmap_eof_func;
 243         xfs_iomap_write_direct_t        xfs_iomap_write_direct;
 244         xfs_iomap_write_delay_t         xfs_iomap_write_delay;
 245         xfs_iomap_write_allocate_t      xfs_iomap_write_allocate;
 246         xfs_iomap_write_unwritten_t     xfs_iomap_write_unwritten;
 247         xfs_lock_t                      xfs_ilock;
 248         xfs_lck_map_shared_t            xfs_lck_map_shared;
 249         xfs_lock_demote_t               xfs_ilock_demote;
 250         xfs_lock_nowait_t               xfs_ilock_nowait;
 251         xfs_unlk_t                      xfs_unlock;
 252         xfs_size_t                      xfs_size_func;
 253         xfs_iodone_t                    xfs_iodone;
 254         xfs_swap_extents_t              xfs_swap_extents_func;
 255 } xfs_ioops_t;
 256
 257 #define XFS_IOINIT(mp, args, flags) \
 258         (*(mp)->m_io_ops.xfs_ioinit)(mp, args, flags)
 259 #define XFS_BMAPI(mp, trans,io,bno,len,f,first,tot,mval,nmap,flist,delta) \
 260         (*(mp)->m_io_ops.xfs_bmapi_func) \
 261                 (trans,(io)->io_obj,bno,len,f,first,tot,mval,nmap,flist,delta)
 262 #define XFS_BUNMAPI(mp, trans,io,bno,len,f,nexts,first,flist,delta,done) \
 263         (*(mp)->m_io_ops.xfs_bunmapi_func) \
 264                 (trans,(io)->io_obj,bno,len,f,nexts,first,flist,delta,done)
 265 #define XFS_BMAP_EOF(mp, io, endoff, whichfork, eof) \
 266         (*(mp)->m_io_ops.xfs_bmap_eof_func) \
 267                 ((io)->io_obj, endoff, whichfork, eof)
 268 #define XFS_IOMAP_WRITE_DIRECT(mp, io, offset, count, flags, mval, nmap, found)\
 269         (*(mp)->m_io_ops.xfs_iomap_write_direct) \
 270                 ((io)->io_obj, offset, count, flags, mval, nmap, found)
 271 #define XFS_IOMAP_WRITE_DELAY(mp, io, offset, count, flags, mval, nmap) \
 272         (*(mp)->m_io_ops.xfs_iomap_write_delay) \
 273                 ((io)->io_obj, offset, count, flags, mval, nmap)
 274 #define XFS_IOMAP_WRITE_ALLOCATE(mp, io, offset, count, mval, nmap) \
 275         (*(mp)->m_io_ops.xfs_iomap_write_allocate) \
 276                 ((io)->io_obj, offset, count, mval, nmap)
 277 #define XFS_IOMAP_WRITE_UNWRITTEN(mp, io, offset, count) \
 278         (*(mp)->m_io_ops.xfs_iomap_write_unwritten) \
 279                 ((io)->io_obj, offset, count)
 280 #define XFS_LCK_MAP_SHARED(mp, io) \
 281         (*(mp)->m_io_ops.xfs_lck_map_shared)((io)->io_obj)
 282 #define XFS_ILOCK(mp, io, mode) \
 283         (*(mp)->m_io_ops.xfs_ilock)((io)->io_obj, mode)
 284 #define XFS_ILOCK_NOWAIT(mp, io, mode) \
 285         (*(mp)->m_io_ops.xfs_ilock_nowait)((io)->io_obj, mode)
 286 #define XFS_IUNLOCK(mp, io, mode) \
 287         (*(mp)->m_io_ops.xfs_unlock)((io)->io_obj, mode)
 288 #define XFS_ILOCK_DEMOTE(mp, io, mode) \
 289         (*(mp)->m_io_ops.xfs_ilock_demote)((io)->io_obj, mode)
 290 #define XFS_SIZE(mp, io) \
 291         (*(mp)->m_io_ops.xfs_size_func)((io)->io_obj)
 292 #define XFS_IODONE(mp) \
 293         (*(mp)->m_io_ops.xfs_iodone)(mp)
 294 #define XFS_SWAP_EXTENTS(mp, io, tio, sxp) \
 295         (*(mp)->m_io_ops.xfs_swap_extents_func) \
 296                 ((io)->io_obj, (tio)->io_obj, sxp)
 297
 298 #ifdef HAVE_PERCPU_SB
 299
 300 /*
 301  * Valid per-cpu incore superblock counters. Note that if you add new counters,
 302  * you may need to define new counter disabled bit field descriptors as there
 303  * are more possible fields in the superblock that can fit in a bitfield on a
 304  * 32 bit platform. The XFS_SBS_* values for the current current counters just
 305  * fit.
 306  */
 307 typedef struct xfs_icsb_cnts {
 308         uint64_t        icsb_fdblocks;
 309         uint64_t        icsb_ifree;
 310         uint64_t        icsb_icount;
 311         unsigned long   icsb_flags;
 312 } xfs_icsb_cnts_t;
 313
 314 #define XFS_ICSB_FLAG_LOCK      (1 << 0)        /* counter lock bit */
 315
 316 #define XFS_ICSB_SB_LOCKED      (1 << 0)        /* sb already locked */
 317 #define XFS_ICSB_LAZY_COUNT     (1 << 1)        /* accuracy not needed */
 318
 319 extern int      xfs_icsb_init_counters(struct xfs_mount *);
 320 extern void     xfs_icsb_reinit_counters(struct xfs_mount *);
 321 extern void     xfs_icsb_sync_counters_flags(struct xfs_mount *, int);
 322
 323 #else
 324 #define xfs_icsb_init_counters(mp)      (0)
 325 #define xfs_icsb_reinit_counters(mp)    do { } while (0)
 326 #define xfs_icsb_sync_counters_flags(mp, flags) do { } while (0)
 327 #endif
 328
 329 typedef struct xfs_mount {
 330         struct super_block      *m_super;
 331         xfs_tid_t               m_tid;          /* next unused tid for fs */
 332         AIL_LOCK_T              m_ail_lock;     /* fs AIL mutex */
 333         xfs_ail_entry_t         m_ail;          /* fs active log item list */
 334         uint                    m_ail_gen;      /* fs AIL generation count */
 335         xfs_sb_t                m_sb;           /* copy of fs superblock */
 336         lock_t                  m_sb_lock;      /* sb counter mutex */
 337         struct xfs_buf          *m_sb_bp;       /* buffer for superblock */
 338         char                    *m_fsname;      /* filesystem name */
 339         int                     m_fsname_len;   /* strlen of fs name */
 340         char                    *m_rtname;      /* realtime device name */
 341         char                    *m_logname;     /* external log device name */
 342         int                     m_bsize;        /* fs logical block size */
 343         xfs_agnumber_t          m_agfrotor;     /* last ag where space found */
 344         xfs_agnumber_t          m_agirotor;     /* last ag dir inode alloced */
 345         lock_t                  m_agirotor_lock;/* .. and lock protecting it */
 346         xfs_agnumber_t          m_maxagi;       /* highest inode alloc group */
 347         struct xfs_inode        *m_inodes;      /* active inode list */
 348         struct list_head        m_del_inodes;   /* inodes to reclaim */
 349         mutex_t                 m_ilock;        /* inode list mutex */
 350         uint                    m_ireclaims;    /* count of calls to reclaim*/
 351         uint                    m_readio_log;   /* min read size log bytes */
 352         uint                    m_readio_blocks; /* min read size blocks */
 353         uint                    m_writeio_log;  /* min write size log bytes */
 354         uint                    m_writeio_blocks; /* min write size blocks */
 355         struct log              *m_log;         /* log specific stuff */
 356         int                     m_logbufs;      /* number of log buffers */
 357         int                     m_logbsize;     /* size of each log buffer */
 358         uint                    m_rsumlevels;   /* rt summary levels */
 359         uint                    m_rsumsize;     /* size of rt summary, bytes */
 360         struct xfs_inode        *m_rbmip;       /* pointer to bitmap inode */
 361         struct xfs_inode        *m_rsumip;      /* pointer to summary inode */
 362         struct xfs_inode        *m_rootip;      /* pointer to root directory */
 363         struct xfs_quotainfo    *m_quotainfo;   /* disk quota information */
 364         xfs_buftarg_t           *m_ddev_targp;  /* saves taking the address */
 365         xfs_buftarg_t           *m_logdev_targp;/* ptr to log device */
 366         xfs_buftarg_t           *m_rtdev_targp; /* ptr to rt device */
 367         __uint8_t               m_dircook_elog; /* log d-cookie entry bits */
 368         __uint8_t               m_blkbit_log;   /* blocklog + NBBY */
 369         __uint8_t               m_blkbb_log;    /* blocklog - BBSHIFT */
 370         __uint8_t               m_agno_log;     /* log #ag's */
 371         __uint8_t               m_agino_log;    /* #bits for agino in inum */
 372         __uint16_t              m_inode_cluster_size;/* min inode buf size */
 373         uint                    m_blockmask;    /* sb_blocksize-1 */
 374         uint                    m_blockwsize;   /* sb_blocksize in words */
 375         uint                    m_blockwmask;   /* blockwsize-1 */
 376         uint                    m_alloc_mxr[2]; /* XFS_ALLOC_BLOCK_MAXRECS */
 377         uint                    m_alloc_mnr[2]; /* XFS_ALLOC_BLOCK_MINRECS */
 378         uint                    m_bmap_dmxr[2]; /* XFS_BMAP_BLOCK_DMAXRECS */
 379         uint                    m_bmap_dmnr[2]; /* XFS_BMAP_BLOCK_DMINRECS */
 380         uint                    m_inobt_mxr[2]; /* XFS_INOBT_BLOCK_MAXRECS */
 381         uint                    m_inobt_mnr[2]; /* XFS_INOBT_BLOCK_MINRECS */
 382         uint                    m_ag_maxlevels; /* XFS_AG_MAXLEVELS */
 383         uint                    m_bm_maxlevels[2]; /* XFS_BM_MAXLEVELS */
 384         uint                    m_in_maxlevels; /* XFS_IN_MAXLEVELS */
 385         struct xfs_perag        *m_perag;       /* per-ag accounting info */
 386         struct rw_semaphore     m_peraglock;    /* lock for m_perag (pointer) */
 387         struct mutex            m_growlock;     /* growfs mutex */
 388         int                     m_fixedfsid[2]; /* unchanged for life of FS */
 389         uint                    m_dmevmask;     /* DMI events for this FS */
 390         __uint64_t              m_flags;        /* global mount flags */
 391         uint                    m_attroffset;   /* inode attribute offset */
 392         uint                    m_dir_node_ents; /* #entries in a dir danode */
 393         uint                    m_attr_node_ents; /* #entries in attr danode */
 394         int                     m_ialloc_inos;  /* inodes in inode allocation */
 395         int                     m_ialloc_blks;  /* blocks in inode allocation */
 396         int                     m_litino;       /* size of inode union area */
 397         int                     m_inoalign_mask;/* mask sb_inoalignmt if used */
 398         uint                    m_qflags;       /* quota status flags */
 399         xfs_trans_reservations_t m_reservations;/* precomputed res values */
 400         __uint64_t              m_maxicount;    /* maximum inode count */
 401         __uint64_t              m_maxioffset;   /* maximum inode offset */
 402         __uint64_t              m_resblks;      /* total reserved blocks */
 403         __uint64_t              m_resblks_avail;/* available reserved blocks */
 404 #if XFS_BIG_INUMS
 405         xfs_ino_t               m_inoadd;       /* add value for ino64_offset */
 406 #endif
 407         int                     m_dalign;       /* stripe unit */
 408         int                     m_swidth;       /* stripe width */
 409         int                     m_sinoalign;    /* stripe unit inode alignment */
 410         int                     m_attr_magicpct;/* 37% of the blocksize */
 411         int                     m_dir_magicpct; /* 37% of the dir blocksize */
 412         __uint8_t               m_mk_sharedro;  /* mark shared ro on unmount */
 413         __uint8_t               m_inode_quiesce;/* call quiesce on new inodes.
 414                                                    field governed by m_ilock */
 415         __uint8_t               m_sectbb_log;   /* sectlog - BBSHIFT */
 416         int                     m_dirblksize;   /* directory block sz--bytes */
 417         int                     m_dirblkfsbs;   /* directory block sz--fsbs */
 418         xfs_dablk_t             m_dirdatablk;   /* blockno of dir data v2 */
 419         xfs_dablk_t             m_dirleafblk;   /* blockno of dir non-data v2 */
 420         xfs_dablk_t             m_dirfreeblk;   /* blockno of dirfreeindex v2 */
 421         uint                    m_chsize;       /* size of next field */
 422         struct xfs_chash        *m_chash;       /* fs private inode per-cluster
 423                                                  * hash table */
 424         struct xfs_dmops        *m_dm_ops;      /* vector of DMI ops */
 425         struct xfs_qmops        *m_qm_ops;      /* vector of XQM ops */
 426         struct xfs_ioops        m_io_ops;       /* vector of I/O ops */
 427         atomic_t                m_active_trans; /* number trans frozen */
 428 #ifdef HAVE_PERCPU_SB
 429         xfs_icsb_cnts_t         *m_sb_cnts;     /* per-cpu superblock counters */
 430         unsigned long           m_icsb_counters; /* disabled per-cpu counters */
 431         struct notifier_block   m_icsb_notifier; /* hotplug cpu notifier */
 432         struct mutex            m_icsb_mutex;   /* balancer sync lock */
 433 #endif
 434         struct xfs_mru_cache    *m_filestream;  /* per-mount filestream data */
 435         struct task_struct      *m_sync_task;   /* generalised sync thread */
 436         bhv_vfs_sync_work_t     m_sync_work;    /* work item for VFS_SYNC */
 437         struct list_head        m_sync_list;    /* sync thread work item list */
 438         spinlock_t              m_sync_lock;    /* work item list lock */
 439         int                     m_sync_seq;     /* sync thread generation no. */
 440         wait_queue_head_t       m_wait_single_sync_task;
 441 } xfs_mount_t;
 442
 443 /*
 444  * Flags for m_flags.
 445  */
 446 #define XFS_MOUNT_WSYNC         (1ULL << 0)     /* for nfs - all metadata ops
 447                                                    must be synchronous except
 448                                                    for space allocations */
 449 #define XFS_MOUNT_INO64         (1ULL << 1)
 450 #define XFS_MOUNT_DMAPI         (1ULL << 2)     /* dmapi is enabled */
 451 #define XFS_MOUNT_WAS_CLEAN     (1ULL << 3)
 452 #define XFS_MOUNT_FS_SHUTDOWN   (1ULL << 4)     /* atomic stop of all filesystem
 453                                                    operations, typically for
 454                                                    disk errors in metadata */
 455 #define XFS_MOUNT_RETERR        (1ULL << 6)     /* return alignment errors to
 456                                                    user */
 457 #define XFS_MOUNT_NOALIGN       (1ULL << 7)     /* turn off stripe alignment
 458                                                    allocations */
 459 #define XFS_MOUNT_ATTR2         (1ULL << 8)     /* allow use of attr2 format */
 460 #define XFS_MOUNT_GRPID         (1ULL << 9)     /* group-ID assigned from directory */
 461 #define XFS_MOUNT_NORECOVERY    (1ULL << 10)    /* no recovery - dirty fs */
 462 #define XFS_MOUNT_SHARED        (1ULL << 11)    /* shared mount */
 463 #define XFS_MOUNT_DFLT_IOSIZE   (1ULL << 12)    /* set default i/o size */
 464 #define XFS_MOUNT_OSYNCISOSYNC  (1ULL << 13)    /* o_sync is REALLY o_sync */
 465                                                 /* osyncisdsync is now default*/
 466 #define XFS_MOUNT_32BITINODES   (1ULL << 14)    /* do not create inodes above
 467                                                  * 32 bits in size */
 468 #define XFS_MOUNT_SMALL_INUMS   (1ULL << 15)    /* users wants 32bit inodes */
 469 #define XFS_MOUNT_NOUUID        (1ULL << 16)    /* ignore uuid during mount */
 470 #define XFS_MOUNT_BARRIER       (1ULL << 17)
 471 #define XFS_MOUNT_IDELETE       (1ULL << 18)    /* delete empty inode clusters*/
 472 #define XFS_MOUNT_SWALLOC       (1ULL << 19)    /* turn on stripe width
 473                                                  * allocation */
 474 #define XFS_MOUNT_RDONLY        (1ULL << 20)    /* read-only fs */
 475 #define XFS_MOUNT_DIRSYNC       (1ULL << 21)    /* synchronous directory ops */
 476 #define XFS_MOUNT_COMPAT_IOSIZE (1ULL << 22)    /* don't report large preferred
 477                                                  * I/O size in stat() */
 478 #define XFS_MOUNT_NO_PERCPU_SB  (1ULL << 23)    /* don't use per-cpu superblock
 479                                                    counters */
 480 #define XFS_MOUNT_FILESTREAMS   (1ULL << 24)    /* enable the filestreams
 481                                                    allocator */
 482
 483
 484 /*
 485  * Default minimum read and write sizes.
 486  */
 487 #define XFS_READIO_LOG_LARGE    16
 488 #define XFS_WRITEIO_LOG_LARGE   16
 489
 490 /*
 491  * Max and min values for mount-option defined I/O
 492  * preallocation sizes.
 493  */
 494 #define XFS_MAX_IO_LOG          30      /* 1G */
 495 #define XFS_MIN_IO_LOG          PAGE_SHIFT
 496
 497 /*
 498  * Synchronous read and write sizes.  This should be
 499  * better for NFSv2 wsync filesystems.
 500  */
 501 #define XFS_WSYNC_READIO_LOG    15      /* 32K */
 502 #define XFS_WSYNC_WRITEIO_LOG   14      /* 16K */
 503
 504 /*
 505  * Allow large block sizes to be reported to userspace programs if the
 506  * "largeio" mount option is used.
 507  *
 508  * If compatibility mode is specified, simply return the basic unit of caching
 509  * so that we don't get inefficient read/modify/write I/O from user apps.
 510  * Otherwise....
 511  *
 512  * If the underlying volume is a stripe, then return the stripe width in bytes
 513  * as the recommended I/O size. It is not a stripe and we've set a default
 514  * buffered I/O size, return that, otherwise return the compat default.
 515  */
 516 static inline unsigned long
 517 xfs_preferred_iosize(xfs_mount_t *mp)
 518 {
 519         if (mp->m_flags & XFS_MOUNT_COMPAT_IOSIZE)
 520                 return PAGE_CACHE_SIZE;
 521         return (mp->m_swidth ?
 522                 (mp->m_swidth << mp->m_sb.sb_blocklog) :
 523                 ((mp->m_flags & XFS_MOUNT_DFLT_IOSIZE) ?
 524                         (1 << (int)MAX(mp->m_readio_log, mp->m_writeio_log)) :
 525                         PAGE_CACHE_SIZE));
 526 }
 527
 528 #define XFS_MAXIOFFSET(mp)      ((mp)->m_maxioffset)
 529
 530 #define XFS_LAST_UNMOUNT_WAS_CLEAN(mp)  \
 531                                 ((mp)->m_flags & XFS_MOUNT_WAS_CLEAN)
 532 #define XFS_FORCED_SHUTDOWN(mp) ((mp)->m_flags & XFS_MOUNT_FS_SHUTDOWN)
 533 void xfs_do_force_shutdown(struct xfs_mount *mp, int flags, char *fname,
 534                 int lnnum);
 535 #define xfs_force_shutdown(m,f) \
 536         xfs_do_force_shutdown(m, f, __FILE__, __LINE__)
 537
 538 /*
 539  * Flags for xfs_mountfs
 540  */
 541 #define XFS_MFSI_SECOND         0x01    /* Secondary mount -- skip stuff */
 542 #define XFS_MFSI_CLIENT         0x02    /* Is a client -- skip lots of stuff */
 543 /*      XFS_MFSI_RRINODES       */
 544 #define XFS_MFSI_NOUNLINK       0x08    /* Skip unlinked inode processing in */
 545                                         /* log recovery */
 546 #define XFS_MFSI_NO_QUOTACHECK  0x10    /* Skip quotacheck processing */
 547 /*      XFS_MFSI_CONVERT_SUNIT  */
 548 #define XFS_MFSI_QUIET          0x40    /* Be silent if mount errors found */
 549
 550 #define XFS_DADDR_TO_AGNO(mp,d)         xfs_daddr_to_agno(mp,d)
 551 static inline xfs_agnumber_t
 552 xfs_daddr_to_agno(struct xfs_mount *mp, xfs_daddr_t d)
 553 {
 554         xfs_daddr_t ld = XFS_BB_TO_FSBT(mp, d);
 555         do_div(ld, mp->m_sb.sb_agblocks);
 556         return (xfs_agnumber_t) ld;
 557 }
 558
 559 #define XFS_DADDR_TO_AGBNO(mp,d)        xfs_daddr_to_agbno(mp,d)
 560 static inline xfs_agblock_t
 561 xfs_daddr_to_agbno(struct xfs_mount *mp, xfs_daddr_t d)
 562 {
 563         xfs_daddr_t ld = XFS_BB_TO_FSBT(mp, d);
 564         return (xfs_agblock_t) do_div(ld, mp->m_sb.sb_agblocks);
 565 }
 566
 567 /*
 568  * perag get/put wrappers for eventual ref counting
 569  */
 570 static inline xfs_perag_t *
 571 xfs_get_perag(struct xfs_mount *mp, xfs_ino_t ino)
 572 {
 573         return &mp->m_perag[XFS_INO_TO_AGNO(mp, ino)];
 574 }
 575
 576 static inline void
 577 xfs_put_perag(struct xfs_mount *mp, xfs_perag_t *pag)
 578 {
 579         /* nothing to see here, move along */
 580 }
 581
 582 /*
 583  * Per-cpu superblock locking functions
 584  */
 585 #ifdef HAVE_PERCPU_SB
 586 STATIC_INLINE void
 587 xfs_icsb_lock(xfs_mount_t *mp)
 588 {
 589         mutex_lock(&mp->m_icsb_mutex);
 590 }
 591
 592 STATIC_INLINE void
 593 xfs_icsb_unlock(xfs_mount_t *mp)
 594 {
 595         mutex_unlock(&mp->m_icsb_mutex);
 596 }
 597 #else
 598 #define xfs_icsb_lock(mp)
 599 #define xfs_icsb_unlock(mp)
 600 #endif
 601
 602 /*
 603  * This structure is for use by the xfs_mod_incore_sb_batch() routine.
 604  * xfs_growfs can specify a few fields which are more than int limit
 605  */
 606 typedef struct xfs_mod_sb {
 607         xfs_sb_field_t  msb_field;      /* Field to modify, see below */
 608         int64_t         msb_delta;      /* Change to make to specified field */
 609 } xfs_mod_sb_t;
 610
 611 #define XFS_MOUNT_ILOCK(mp)     mutex_lock(&((mp)->m_ilock))
 612 #define XFS_MOUNT_IUNLOCK(mp)   mutex_unlock(&((mp)->m_ilock))
 613 #define XFS_SB_LOCK(mp)         mutex_spinlock(&(mp)->m_sb_lock)
 614 #define XFS_SB_UNLOCK(mp,s)     mutex_spinunlock(&(mp)->m_sb_lock,(s))
 615
 616 extern xfs_mount_t *xfs_mount_init(void);
 617 extern void     xfs_mod_sb(xfs_trans_t *, __int64_t);
 618 extern int      xfs_log_sbcount(xfs_mount_t *, uint);
 619 extern void     xfs_mount_free(xfs_mount_t *mp);
 620 extern int      xfs_mountfs(xfs_mount_t *mp, int);
 621 extern void     xfs_mountfs_check_barriers(xfs_mount_t *mp);
 622
 623 extern int      xfs_unmountfs(xfs_mount_t *, struct cred *);
 624 extern void     xfs_unmountfs_close(xfs_mount_t *, struct cred *);
 625 extern int      xfs_unmountfs_writesb(xfs_mount_t *);
 626 extern int      xfs_unmount_flush(xfs_mount_t *, int);
 627 extern int      xfs_mod_incore_sb(xfs_mount_t *, xfs_sb_field_t, int64_t, int);
 628 extern int      xfs_mod_incore_sb_unlocked(xfs_mount_t *, xfs_sb_field_t,
 629                         int64_t, int);
 630 extern int      xfs_mod_incore_sb_batch(xfs_mount_t *, xfs_mod_sb_t *,
 631                         uint, int);
 632 extern struct xfs_buf *xfs_getsb(xfs_mount_t *, int);
 633 extern int      xfs_readsb(xfs_mount_t *, int);
 634 extern void     xfs_freesb(xfs_mount_t *);
 635 extern int      xfs_fs_writable(xfs_mount_t *);
 636 extern int      xfs_syncsub(xfs_mount_t *, int, int *);
 637 extern int      xfs_sync_inodes(xfs_mount_t *, int, int *);
 638 extern xfs_agnumber_t   xfs_initialize_perag(xfs_mount_t *, xfs_agnumber_t);
 639 extern void     xfs_sb_from_disk(struct xfs_sb *, struct xfs_dsb *);
 640 extern void     xfs_sb_to_disk(struct xfs_dsb *, struct xfs_sb *, __int64_t);
 641 extern int      xfs_sb_validate_fsb_count(struct xfs_sb *, __uint64_t);
 642
 643 extern int      xfs_dmops_get(struct xfs_mount *, struct xfs_mount_args *);
 644 extern void     xfs_dmops_put(struct xfs_mount *);
 645 extern int      xfs_qmops_get(struct xfs_mount *, struct xfs_mount_args *);
 646 extern void     xfs_qmops_put(struct xfs_mount *);
 647
 648 extern struct xfs_dmops xfs_dmcore_xfs;
 649 extern struct xfs_ioops xfs_iocore_xfs;
 650
 651 extern int      xfs_init(void);
 652 extern void     xfs_cleanup(void);
 653
 654 #endif  /* __KERNEL__ */
 655
 656 #endif  /* __XFS_MOUNT_H__ */