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 bhv_vfs;
  58 struct xfs_mount_args;
  59 struct xfs_inode;
  60 struct xfs_iocore;
  61 struct xfs_bmbt_irec;
  62 struct xfs_bmap_free;
  63 struct xfs_extdelta;
  64 struct xfs_swapext;
  65 struct xfs_mru_cache;
  66
  67 #define AIL_LOCK_T              lock_t
  68 #define AIL_LOCKINIT(x,y)       spinlock_init(x,y)
  69 #define AIL_LOCK_DESTROY(x)     spinlock_destroy(x)
  70 #define AIL_LOCK(mp,s)          s=mutex_spinlock(&(mp)->m_ail_lock)
  71 #define AIL_UNLOCK(mp,s)        mutex_spinunlock(&(mp)->m_ail_lock, s)
  72
  73
  74 /*
  75  * Prototypes and functions for the Data Migration subsystem.
  76  */
  77
  78 typedef int     (*xfs_send_data_t)(int, bhv_vnode_t *,
  79                         xfs_off_t, size_t, int, bhv_vrwlock_t *);
  80 typedef int     (*xfs_send_mmap_t)(struct vm_area_struct *, uint);
  81 typedef int     (*xfs_send_destroy_t)(bhv_vnode_t *, dm_right_t);
  82 typedef int     (*xfs_send_namesp_t)(dm_eventtype_t, struct bhv_vfs *,
  83                         bhv_vnode_t *,
  84                         dm_right_t, bhv_vnode_t *, dm_right_t,
  85                         char *, char *, mode_t, int, int);
  86 typedef int     (*xfs_send_mount_t)(struct xfs_mount *, dm_right_t,
  87                         char *, char *);
  88 typedef void    (*xfs_send_unmount_t)(struct bhv_vfs *, bhv_vnode_t *,
  89                         dm_right_t, mode_t, int, int);
  90
  91 typedef struct xfs_dmops {
  92         xfs_send_data_t         xfs_send_data;
  93         xfs_send_mmap_t         xfs_send_mmap;
  94         xfs_send_destroy_t      xfs_send_destroy;
  95         xfs_send_namesp_t       xfs_send_namesp;
  96         xfs_send_mount_t        xfs_send_mount;
  97         xfs_send_unmount_t      xfs_send_unmount;
  98 } xfs_dmops_t;
  99
 100 #define XFS_SEND_DATA(mp, ev,vp,off,len,fl,lock) \
 101         (*(mp)->m_dm_ops->xfs_send_data)(ev,vp,off,len,fl,lock)
 102 #define XFS_SEND_MMAP(mp, vma,fl) \
 103         (*(mp)->m_dm_ops->xfs_send_mmap)(vma,fl)
 104 #define XFS_SEND_DESTROY(mp, vp,right) \
 105         (*(mp)->m_dm_ops->xfs_send_destroy)(vp,right)
 106 #define XFS_SEND_NAMESP(mp, ev,b1,r1,b2,r2,n1,n2,mode,rval,fl) \
 107         (*(mp)->m_dm_ops->xfs_send_namesp)(ev,NULL,b1,r1,b2,r2,n1,n2,mode,rval,fl)
 108 #define XFS_SEND_PREUNMOUNT(mp, vfs,b1,r1,b2,r2,n1,n2,mode,rval,fl) \
 109         (*(mp)->m_dm_ops->xfs_send_namesp)(DM_EVENT_PREUNMOUNT,vfs,b1,r1,b2,r2,n1,n2,mode,rval,fl)
 110 #define XFS_SEND_MOUNT(mp,right,path,name) \
 111         (*(mp)->m_dm_ops->xfs_send_mount)(mp,right,path,name)
 112 #define XFS_SEND_UNMOUNT(mp, vfsp,vp,right,mode,rval,fl) \
 113         (*(mp)->m_dm_ops->xfs_send_unmount)(vfsp,vp,right,mode,rval,fl)
 114
 115
 116 /*
 117  * Prototypes and functions for the Quota Management subsystem.
 118  */
 119
 120 struct xfs_dquot;
 121 struct xfs_dqtrxops;
 122 struct xfs_quotainfo;
 123
 124 typedef int     (*xfs_qminit_t)(struct xfs_mount *, uint *, uint *);
 125 typedef int     (*xfs_qmmount_t)(struct xfs_mount *, uint, uint, int);
 126 typedef int     (*xfs_qmunmount_t)(struct xfs_mount *);
 127 typedef void    (*xfs_qmdone_t)(struct xfs_mount *);
 128 typedef void    (*xfs_dqrele_t)(struct xfs_dquot *);
 129 typedef int     (*xfs_dqattach_t)(struct xfs_inode *, uint);
 130 typedef void    (*xfs_dqdetach_t)(struct xfs_inode *);
 131 typedef int     (*xfs_dqpurgeall_t)(struct xfs_mount *, uint);
 132 typedef int     (*xfs_dqvopalloc_t)(struct xfs_mount *,
 133                         struct xfs_inode *, uid_t, gid_t, prid_t, uint,
 134                         struct xfs_dquot **, struct xfs_dquot **);
 135 typedef void    (*xfs_dqvopcreate_t)(struct xfs_trans *, struct xfs_inode *,
 136                         struct xfs_dquot *, struct xfs_dquot *);
 137 typedef int     (*xfs_dqvoprename_t)(struct xfs_inode **);
 138 typedef struct xfs_dquot * (*xfs_dqvopchown_t)(
 139                         struct xfs_trans *, struct xfs_inode *,
 140                         struct xfs_dquot **, struct xfs_dquot *);
 141 typedef int     (*xfs_dqvopchownresv_t)(struct xfs_trans *, struct xfs_inode *,
 142                         struct xfs_dquot *, struct xfs_dquot *, uint);
 143 typedef void    (*xfs_dqstatvfs_t)(struct xfs_inode *, bhv_statvfs_t *);
 144 typedef int     (*xfs_dqsync_t)(struct xfs_mount *, int flags);
 145 typedef int     (*xfs_quotactl_t)(struct xfs_mount *, int, int, xfs_caddr_t);
 146
 147 typedef struct xfs_qmops {
 148         xfs_qminit_t            xfs_qminit;
 149         xfs_qmdone_t            xfs_qmdone;
 150         xfs_qmmount_t           xfs_qmmount;
 151         xfs_qmunmount_t         xfs_qmunmount;
 152         xfs_dqrele_t            xfs_dqrele;
 153         xfs_dqattach_t          xfs_dqattach;
 154         xfs_dqdetach_t          xfs_dqdetach;
 155         xfs_dqpurgeall_t        xfs_dqpurgeall;
 156         xfs_dqvopalloc_t        xfs_dqvopalloc;
 157         xfs_dqvopcreate_t       xfs_dqvopcreate;
 158         xfs_dqvoprename_t       xfs_dqvoprename;
 159         xfs_dqvopchown_t        xfs_dqvopchown;
 160         xfs_dqvopchownresv_t    xfs_dqvopchownresv;
 161         xfs_dqstatvfs_t         xfs_dqstatvfs;
 162         xfs_dqsync_t            xfs_dqsync;
 163         xfs_quotactl_t          xfs_quotactl;
 164         struct xfs_dqtrxops     *xfs_dqtrxops;
 165 } xfs_qmops_t;
 166
 167 #define XFS_QM_INIT(mp, mnt, fl) \
 168         (*(mp)->m_qm_ops->xfs_qminit)(mp, mnt, fl)
 169 #define XFS_QM_MOUNT(mp, mnt, fl, mfsi_flags) \
 170         (*(mp)->m_qm_ops->xfs_qmmount)(mp, mnt, fl, mfsi_flags)
 171 #define XFS_QM_UNMOUNT(mp) \
 172         (*(mp)->m_qm_ops->xfs_qmunmount)(mp)
 173 #define XFS_QM_DONE(mp) \
 174         (*(mp)->m_qm_ops->xfs_qmdone)(mp)
 175 #define XFS_QM_DQRELE(mp, dq) \
 176         (*(mp)->m_qm_ops->xfs_dqrele)(dq)
 177 #define XFS_QM_DQATTACH(mp, ip, fl) \
 178         (*(mp)->m_qm_ops->xfs_dqattach)(ip, fl)
 179 #define XFS_QM_DQDETACH(mp, ip) \
 180         (*(mp)->m_qm_ops->xfs_dqdetach)(ip)
 181 #define XFS_QM_DQPURGEALL(mp, fl) \
 182         (*(mp)->m_qm_ops->xfs_dqpurgeall)(mp, fl)
 183 #define XFS_QM_DQVOPALLOC(mp, ip, uid, gid, prid, fl, dq1, dq2) \
 184         (*(mp)->m_qm_ops->xfs_dqvopalloc)(mp, ip, uid, gid, prid, fl, dq1, dq2)
 185 #define XFS_QM_DQVOPCREATE(mp, tp, ip, dq1, dq2) \
 186         (*(mp)->m_qm_ops->xfs_dqvopcreate)(tp, ip, dq1, dq2)
 187 #define XFS_QM_DQVOPRENAME(mp, ip) \
 188         (*(mp)->m_qm_ops->xfs_dqvoprename)(ip)
 189 #define XFS_QM_DQVOPCHOWN(mp, tp, ip, dqp, dq) \
 190         (*(mp)->m_qm_ops->xfs_dqvopchown)(tp, ip, dqp, dq)
 191 #define XFS_QM_DQVOPCHOWNRESV(mp, tp, ip, dq1, dq2, fl) \
 192         (*(mp)->m_qm_ops->xfs_dqvopchownresv)(tp, ip, dq1, dq2, fl)
 193 #define XFS_QM_DQSTATVFS(ip, statp) \
 194         (*(ip)->i_mount->m_qm_ops->xfs_dqstatvfs)(ip, statp)
 195 #define XFS_QM_DQSYNC(mp, flags) \
 196         (*(mp)->m_qm_ops->xfs_dqsync)(mp, flags)
 197 #define XFS_QM_QUOTACTL(mp, cmd, id, addr) \
 198         (*(mp)->m_qm_ops->xfs_quotactl)(mp, cmd, id, addr)
 199
 200
 201 /*
 202  * Prototypes and functions for I/O core modularization.
 203  */
 204
 205 typedef int             (*xfs_ioinit_t)(struct bhv_vfs *,
 206                                 struct xfs_mount_args *, int);
 207 typedef int             (*xfs_bmapi_t)(struct xfs_trans *, void *,
 208                                 xfs_fileoff_t, xfs_filblks_t, int,
 209                                 xfs_fsblock_t *, xfs_extlen_t,
 210                                 struct xfs_bmbt_irec *, int *,
 211                                 struct xfs_bmap_free *, struct xfs_extdelta *);
 212 typedef int             (*xfs_bunmapi_t)(struct xfs_trans *,
 213                                 void *, xfs_fileoff_t,
 214                                 xfs_filblks_t, int, xfs_extnum_t,
 215                                 xfs_fsblock_t *, struct xfs_bmap_free *,
 216                                 struct xfs_extdelta *, int *);
 217 typedef int             (*xfs_bmap_eof_t)(void *, xfs_fileoff_t, int, int *);
 218 typedef int             (*xfs_iomap_write_direct_t)(
 219                                 void *, xfs_off_t, size_t, int,
 220                                 struct xfs_bmbt_irec *, int *, int);
 221 typedef int             (*xfs_iomap_write_delay_t)(
 222                                 void *, xfs_off_t, size_t, int,
 223                                 struct xfs_bmbt_irec *, int *);
 224 typedef int             (*xfs_iomap_write_allocate_t)(
 225                                 void *, xfs_off_t, size_t,
 226                                 struct xfs_bmbt_irec *, int *);
 227 typedef int             (*xfs_iomap_write_unwritten_t)(
 228                                 void *, xfs_off_t, size_t);
 229 typedef uint            (*xfs_lck_map_shared_t)(void *);
 230 typedef void            (*xfs_lock_t)(void *, uint);
 231 typedef void            (*xfs_lock_demote_t)(void *, uint);
 232 typedef int             (*xfs_lock_nowait_t)(void *, uint);
 233 typedef void            (*xfs_unlk_t)(void *, unsigned int);
 234 typedef xfs_fsize_t     (*xfs_size_t)(void *);
 235 typedef xfs_fsize_t     (*xfs_iodone_t)(struct bhv_vfs *);
 236 typedef int             (*xfs_swap_extents_t)(void *, void *,
 237                                 struct xfs_swapext*);
 238
 239 typedef struct xfs_ioops {
 240         xfs_ioinit_t                    xfs_ioinit;
 241         xfs_bmapi_t                     xfs_bmapi_func;
 242         xfs_bunmapi_t                   xfs_bunmapi_func;
 243         xfs_bmap_eof_t                  xfs_bmap_eof_func;
 244         xfs_iomap_write_direct_t        xfs_iomap_write_direct;
 245         xfs_iomap_write_delay_t         xfs_iomap_write_delay;
 246         xfs_iomap_write_allocate_t      xfs_iomap_write_allocate;
 247         xfs_iomap_write_unwritten_t     xfs_iomap_write_unwritten;
 248         xfs_lock_t                      xfs_ilock;
 249         xfs_lck_map_shared_t            xfs_lck_map_shared;
 250         xfs_lock_demote_t               xfs_ilock_demote;
 251         xfs_lock_nowait_t               xfs_ilock_nowait;
 252         xfs_unlk_t                      xfs_unlock;
 253         xfs_size_t                      xfs_size_func;
 254         xfs_iodone_t                    xfs_iodone;
 255         xfs_swap_extents_t              xfs_swap_extents_func;
 256 } xfs_ioops_t;
 257
 258 #define XFS_IOINIT(vfsp, args, flags) \
 259         (*(mp)->m_io_ops.xfs_ioinit)(vfsp, args, flags)
 260 #define XFS_BMAPI(mp, trans,io,bno,len,f,first,tot,mval,nmap,flist,delta) \
 261         (*(mp)->m_io_ops.xfs_bmapi_func) \
 262                 (trans,(io)->io_obj,bno,len,f,first,tot,mval,nmap,flist,delta)
 263 #define XFS_BUNMAPI(mp, trans,io,bno,len,f,nexts,first,flist,delta,done) \
 264         (*(mp)->m_io_ops.xfs_bunmapi_func) \
 265                 (trans,(io)->io_obj,bno,len,f,nexts,first,flist,delta,done)
 266 #define XFS_BMAP_EOF(mp, io, endoff, whichfork, eof) \
 267         (*(mp)->m_io_ops.xfs_bmap_eof_func) \
 268                 ((io)->io_obj, endoff, whichfork, eof)
 269 #define XFS_IOMAP_WRITE_DIRECT(mp, io, offset, count, flags, mval, nmap, found)\
 270         (*(mp)->m_io_ops.xfs_iomap_write_direct) \
 271                 ((io)->io_obj, offset, count, flags, mval, nmap, found)
 272 #define XFS_IOMAP_WRITE_DELAY(mp, io, offset, count, flags, mval, nmap) \
 273         (*(mp)->m_io_ops.xfs_iomap_write_delay) \
 274                 ((io)->io_obj, offset, count, flags, mval, nmap)
 275 #define XFS_IOMAP_WRITE_ALLOCATE(mp, io, offset, count, mval, nmap) \
 276         (*(mp)->m_io_ops.xfs_iomap_write_allocate) \
 277                 ((io)->io_obj, offset, count, mval, nmap)
 278 #define XFS_IOMAP_WRITE_UNWRITTEN(mp, io, offset, count) \
 279         (*(mp)->m_io_ops.xfs_iomap_write_unwritten) \
 280                 ((io)->io_obj, offset, count)
 281 #define XFS_LCK_MAP_SHARED(mp, io) \
 282         (*(mp)->m_io_ops.xfs_lck_map_shared)((io)->io_obj)
 283 #define XFS_ILOCK(mp, io, mode) \
 284         (*(mp)->m_io_ops.xfs_ilock)((io)->io_obj, mode)
 285 #define XFS_ILOCK_NOWAIT(mp, io, mode) \
 286         (*(mp)->m_io_ops.xfs_ilock_nowait)((io)->io_obj, mode)
 287 #define XFS_IUNLOCK(mp, io, mode) \
 288         (*(mp)->m_io_ops.xfs_unlock)((io)->io_obj, mode)
 289 #define XFS_ILOCK_DEMOTE(mp, io, mode) \
 290         (*(mp)->m_io_ops.xfs_ilock_demote)((io)->io_obj, mode)
 291 #define XFS_SIZE(mp, io) \
 292         (*(mp)->m_io_ops.xfs_size_func)((io)->io_obj)
 293 #define XFS_IODONE(vfsp) \
 294         (*(mp)->m_io_ops.xfs_iodone)(vfsp)
 295 #define XFS_SWAP_EXTENTS(mp, io, tio, sxp) \
 296         (*(mp)->m_io_ops.xfs_swap_extents_func) \
 297                 ((io)->io_obj, (tio)->io_obj, sxp)
 298
 299 #ifdef HAVE_PERCPU_SB
 300
 301 /*
 302  * Valid per-cpu incore superblock counters. Note that if you add new counters,
 303  * you may need to define new counter disabled bit field descriptors as there
 304  * are more possible fields in the superblock that can fit in a bitfield on a
 305  * 32 bit platform. The XFS_SBS_* values for the current current counters just
 306  * fit.
 307  */
 308 typedef struct xfs_icsb_cnts {
 309         uint64_t        icsb_fdblocks;
 310         uint64_t        icsb_ifree;
 311         uint64_t        icsb_icount;
 312         unsigned long   icsb_flags;
 313 } xfs_icsb_cnts_t;
 314
 315 #define XFS_ICSB_FLAG_LOCK      (1 << 0)        /* counter lock bit */
 316
 317 #define XFS_ICSB_SB_LOCKED      (1 << 0)        /* sb already locked */
 318 #define XFS_ICSB_LAZY_COUNT     (1 << 1)        /* accuracy not needed */
 319
 320 extern int      xfs_icsb_init_counters(struct xfs_mount *);
 321 extern void     xfs_icsb_reinit_counters(struct xfs_mount *);
 322 extern void     xfs_icsb_sync_counters_flags(struct xfs_mount *, int);
 323
 324 #else
 325 #define xfs_icsb_init_counters(mp)      (0)
 326 #define xfs_icsb_reinit_counters(mp)    do { } while (0)
 327 #define xfs_icsb_sync_counters_flags(mp, flags) do { } while (0)
 328 #endif
 329
 330 typedef struct xfs_mount {
 331         struct bhv_vfs          *m_vfsp;
 332         xfs_tid_t               m_tid;          /* next unused tid for fs */
 333         AIL_LOCK_T              m_ail_lock;     /* fs AIL mutex */
 334         xfs_ail_entry_t         m_ail;          /* fs active log item list */
 335         uint                    m_ail_gen;      /* fs AIL generation count */
 336         xfs_sb_t                m_sb;           /* copy of fs superblock */
 337         lock_t                  m_sb_lock;      /* sb counter mutex */
 338         struct xfs_buf          *m_sb_bp;       /* buffer for superblock */
 339         char                    *m_fsname;      /* filesystem name */
 340         int                     m_fsname_len;   /* strlen of fs name */
 341         char                    *m_rtname;      /* realtime device name */
 342         char                    *m_logname;     /* external log device name */
 343         int                     m_bsize;        /* fs logical block size */
 344         xfs_agnumber_t          m_agfrotor;     /* last ag where space found */
 345         xfs_agnumber_t          m_agirotor;     /* last ag dir inode alloced */
 346         lock_t                  m_agirotor_lock;/* .. and lock protecting it */
 347         xfs_agnumber_t          m_maxagi;       /* highest inode alloc group */
 348         struct xfs_inode        *m_inodes;      /* active inode list */
 349         struct list_head        m_del_inodes;   /* inodes to reclaim */
 350         mutex_t                 m_ilock;        /* inode list mutex */
 351         uint                    m_ireclaims;    /* count of calls to reclaim*/
 352         uint                    m_readio_log;   /* min read size log bytes */
 353         uint                    m_readio_blocks; /* min read size blocks */
 354         uint                    m_writeio_log;  /* min write size log bytes */
 355         uint                    m_writeio_blocks; /* min write size blocks */
 356         struct log              *m_log;         /* log specific stuff */
 357         int                     m_logbufs;      /* number of log buffers */
 358         int                     m_logbsize;     /* size of each log buffer */
 359         uint                    m_rsumlevels;   /* rt summary levels */
 360         uint                    m_rsumsize;     /* size of rt summary, bytes */
 361         struct xfs_inode        *m_rbmip;       /* pointer to bitmap inode */
 362         struct xfs_inode        *m_rsumip;      /* pointer to summary inode */
 363         struct xfs_inode        *m_rootip;      /* pointer to root directory */
 364         struct xfs_quotainfo    *m_quotainfo;   /* disk quota information */
 365         xfs_buftarg_t           *m_ddev_targp;  /* saves taking the address */
 366         xfs_buftarg_t           *m_logdev_targp;/* ptr to log device */
 367         xfs_buftarg_t           *m_rtdev_targp; /* ptr to rt device */
 368         __uint8_t               m_dircook_elog; /* log d-cookie entry bits */
 369         __uint8_t               m_blkbit_log;   /* blocklog + NBBY */
 370         __uint8_t               m_blkbb_log;    /* blocklog - BBSHIFT */
 371         __uint8_t               m_agno_log;     /* log #ag's */
 372         __uint8_t               m_agino_log;    /* #bits for agino in inum */
 373         __uint16_t              m_inode_cluster_size;/* min inode buf size */
 374         uint                    m_blockmask;    /* sb_blocksize-1 */
 375         uint                    m_blockwsize;   /* sb_blocksize in words */
 376         uint                    m_blockwmask;   /* blockwsize-1 */
 377         uint                    m_alloc_mxr[2]; /* XFS_ALLOC_BLOCK_MAXRECS */
 378         uint                    m_alloc_mnr[2]; /* XFS_ALLOC_BLOCK_MINRECS */
 379         uint                    m_bmap_dmxr[2]; /* XFS_BMAP_BLOCK_DMAXRECS */
 380         uint                    m_bmap_dmnr[2]; /* XFS_BMAP_BLOCK_DMINRECS */
 381         uint                    m_inobt_mxr[2]; /* XFS_INOBT_BLOCK_MAXRECS */
 382         uint                    m_inobt_mnr[2]; /* XFS_INOBT_BLOCK_MINRECS */
 383         uint                    m_ag_maxlevels; /* XFS_AG_MAXLEVELS */
 384         uint                    m_bm_maxlevels[2]; /* XFS_BM_MAXLEVELS */
 385         uint                    m_in_maxlevels; /* XFS_IN_MAXLEVELS */
 386         struct xfs_perag        *m_perag;       /* per-ag accounting info */
 387         struct rw_semaphore     m_peraglock;    /* lock for m_perag (pointer) */
 388         sema_t                  m_growlock;     /* growfs mutex */
 389         int                     m_fixedfsid[2]; /* unchanged for life of FS */
 390         uint                    m_dmevmask;     /* DMI events for this FS */
 391         __uint64_t              m_flags;        /* global mount flags */
 392         uint                    m_attroffset;   /* inode attribute offset */
 393         uint                    m_dir_node_ents; /* #entries in a dir danode */
 394         uint                    m_attr_node_ents; /* #entries in attr danode */
 395         int                     m_ialloc_inos;  /* inodes in inode allocation */
 396         int                     m_ialloc_blks;  /* blocks in inode allocation */
 397         int                     m_litino;       /* size of inode union area */
 398         int                     m_inoalign_mask;/* mask sb_inoalignmt if used */
 399         uint                    m_qflags;       /* quota status flags */
 400         xfs_trans_reservations_t m_reservations;/* precomputed res values */
 401         __uint64_t              m_maxicount;    /* maximum inode count */
 402         __uint64_t              m_maxioffset;   /* maximum inode offset */
 403         __uint64_t              m_resblks;      /* total reserved blocks */
 404         __uint64_t              m_resblks_avail;/* available reserved blocks */
 405 #if XFS_BIG_INUMS
 406         xfs_ino_t               m_inoadd;       /* add value for ino64_offset */
 407 #endif
 408         int                     m_dalign;       /* stripe unit */
 409         int                     m_swidth;       /* stripe width */
 410         int                     m_sinoalign;    /* stripe unit inode alignment */
 411         int                     m_attr_magicpct;/* 37% of the blocksize */
 412         int                     m_dir_magicpct; /* 37% of the dir blocksize */
 413         __uint8_t               m_mk_sharedro;  /* mark shared ro on unmount */
 414         __uint8_t               m_inode_quiesce;/* call quiesce on new inodes.
 415                                                    field governed by m_ilock */
 416         __uint8_t               m_sectbb_log;   /* sectlog - BBSHIFT */
 417         int                     m_dirblksize;   /* directory block sz--bytes */
 418         int                     m_dirblkfsbs;   /* directory block sz--fsbs */
 419         xfs_dablk_t             m_dirdatablk;   /* blockno of dir data v2 */
 420         xfs_dablk_t             m_dirleafblk;   /* blockno of dir non-data v2 */
 421         xfs_dablk_t             m_dirfreeblk;   /* blockno of dirfreeindex v2 */
 422         uint                    m_chsize;       /* size of next field */
 423         struct xfs_chash        *m_chash;       /* fs private inode per-cluster
 424                                                  * hash table */
 425         struct xfs_dmops        *m_dm_ops;      /* vector of DMI ops */
 426         struct xfs_qmops        *m_qm_ops;      /* vector of XQM ops */
 427         struct xfs_ioops        m_io_ops;       /* vector of I/O ops */
 428         atomic_t                m_active_trans; /* number trans frozen */
 429 #ifdef HAVE_PERCPU_SB
 430         xfs_icsb_cnts_t         *m_sb_cnts;     /* per-cpu superblock counters */
 431         unsigned long           m_icsb_counters; /* disabled per-cpu counters */
 432         struct notifier_block   m_icsb_notifier; /* hotplug cpu notifier */
 433         struct mutex            m_icsb_mutex;   /* balancer sync lock */
 434 #endif
 435         struct xfs_mru_cache    *m_filestream;  /* per-mount filestream data */
 436 } xfs_mount_t;
 437
 438 /*
 439  * Flags for m_flags.
 440  */
 441 #define XFS_MOUNT_WSYNC         (1ULL << 0)     /* for nfs - all metadata ops
 442                                                    must be synchronous except
 443                                                    for space allocations */
 444 #define XFS_MOUNT_INO64         (1ULL << 1)
 445                              /* (1ULL << 2)     -- currently unused */
 446 #define XFS_MOUNT_WAS_CLEAN     (1ULL << 3)
 447 #define XFS_MOUNT_FS_SHUTDOWN   (1ULL << 4)     /* atomic stop of all filesystem
 448                                                    operations, typically for
 449                                                    disk errors in metadata */
 450 #define XFS_MOUNT_RETERR        (1ULL << 6)     /* return alignment errors to
 451                                                    user */
 452 #define XFS_MOUNT_NOALIGN       (1ULL << 7)     /* turn off stripe alignment
 453                                                    allocations */
 454 #define XFS_MOUNT_ATTR2         (1ULL << 8)     /* allow use of attr2 format */
 455                              /* (1ULL << 9)     -- currently unused */
 456 #define XFS_MOUNT_NORECOVERY    (1ULL << 10)    /* no recovery - dirty fs */
 457 #define XFS_MOUNT_SHARED        (1ULL << 11)    /* shared mount */
 458 #define XFS_MOUNT_DFLT_IOSIZE   (1ULL << 12)    /* set default i/o size */
 459 #define XFS_MOUNT_OSYNCISOSYNC  (1ULL << 13)    /* o_sync is REALLY o_sync */
 460                                                 /* osyncisdsync is now default*/
 461 #define XFS_MOUNT_32BITINODES   (1ULL << 14)    /* do not create inodes above
 462                                                  * 32 bits in size */
 463                              /* (1ULL << 15)    -- currently unused */
 464 #define XFS_MOUNT_NOUUID        (1ULL << 16)    /* ignore uuid during mount */
 465 #define XFS_MOUNT_BARRIER       (1ULL << 17)
 466 #define XFS_MOUNT_IDELETE       (1ULL << 18)    /* delete empty inode clusters*/
 467 #define XFS_MOUNT_SWALLOC       (1ULL << 19)    /* turn on stripe width
 468                                                  * allocation */
 469                              /* (1ULL << 20)    -- currently unused */
 470 #define XFS_MOUNT_DIRSYNC       (1ULL << 21)    /* synchronous directory ops */
 471 #define XFS_MOUNT_COMPAT_IOSIZE (1ULL << 22)    /* don't report large preferred
 472                                                  * I/O size in stat() */
 473 #define XFS_MOUNT_NO_PERCPU_SB  (1ULL << 23)    /* don't use per-cpu superblock
 474                                                    counters */
 475 #define XFS_MOUNT_FILESTREAMS   (1ULL << 24)    /* enable the filestreams
 476                                                    allocator */
 477
 478
 479 /*
 480  * Default minimum read and write sizes.
 481  */
 482 #define XFS_READIO_LOG_LARGE    16
 483 #define XFS_WRITEIO_LOG_LARGE   16
 484
 485 /*
 486  * Max and min values for mount-option defined I/O
 487  * preallocation sizes.
 488  */
 489 #define XFS_MAX_IO_LOG          30      /* 1G */
 490 #define XFS_MIN_IO_LOG          PAGE_SHIFT
 491
 492 /*
 493  * Synchronous read and write sizes.  This should be
 494  * better for NFSv2 wsync filesystems.
 495  */
 496 #define XFS_WSYNC_READIO_LOG    15      /* 32K */
 497 #define XFS_WSYNC_WRITEIO_LOG   14      /* 16K */
 498
 499 /*
 500  * Allow large block sizes to be reported to userspace programs if the
 501  * "largeio" mount option is used.
 502  *
 503  * If compatibility mode is specified, simply return the basic unit of caching
 504  * so that we don't get inefficient read/modify/write I/O from user apps.
 505  * Otherwise....
 506  *
 507  * If the underlying volume is a stripe, then return the stripe width in bytes
 508  * as the recommended I/O size. It is not a stripe and we've set a default
 509  * buffered I/O size, return that, otherwise return the compat default.
 510  */
 511 static inline unsigned long
 512 xfs_preferred_iosize(xfs_mount_t *mp)
 513 {
 514         if (mp->m_flags & XFS_MOUNT_COMPAT_IOSIZE)
 515                 return PAGE_CACHE_SIZE;
 516         return (mp->m_swidth ?
 517                 (mp->m_swidth << mp->m_sb.sb_blocklog) :
 518                 ((mp->m_flags & XFS_MOUNT_DFLT_IOSIZE) ?
 519                         (1 << (int)MAX(mp->m_readio_log, mp->m_writeio_log)) :
 520                         PAGE_CACHE_SIZE));
 521 }
 522
 523 #define XFS_MAXIOFFSET(mp)      ((mp)->m_maxioffset)
 524
 525 #define XFS_LAST_UNMOUNT_WAS_CLEAN(mp)  \
 526                                 ((mp)->m_flags & XFS_MOUNT_WAS_CLEAN)
 527 #define XFS_FORCED_SHUTDOWN(mp) ((mp)->m_flags & XFS_MOUNT_FS_SHUTDOWN)
 528 void xfs_do_force_shutdown(struct xfs_mount *mp, int flags, char *fname,
 529                 int lnnum);
 530 #define xfs_force_shutdown(m,f) \
 531         xfs_do_force_shutdown(m, f, __FILE__, __LINE__)
 532
 533 /*
 534  * Flags for xfs_mountfs
 535  */
 536 #define XFS_MFSI_SECOND         0x01    /* Secondary mount -- skip stuff */
 537 #define XFS_MFSI_CLIENT         0x02    /* Is a client -- skip lots of stuff */
 538 /*      XFS_MFSI_RRINODES       */
 539 #define XFS_MFSI_NOUNLINK       0x08    /* Skip unlinked inode processing in */
 540                                         /* log recovery */
 541 #define XFS_MFSI_NO_QUOTACHECK  0x10    /* Skip quotacheck processing */
 542 /*      XFS_MFSI_CONVERT_SUNIT  */
 543 #define XFS_MFSI_QUIET          0x40    /* Be silent if mount errors found */
 544
 545 /*
 546  * Macros for getting from mount to vfs and back.
 547  */
 548 #define XFS_MTOVFS(mp)          xfs_mtovfs(mp)
 549 static inline struct bhv_vfs *xfs_mtovfs(xfs_mount_t *mp)
 550 {
 551         return mp->m_vfsp;
 552 }
 553
 554 #define XFS_VFSTOM(vfs) xfs_vfstom(vfs)
 555 static inline xfs_mount_t *xfs_vfstom(bhv_vfs_t *vfs)
 556 {
 557         return vfs->vfs_mount;
 558 }
 559
 560 #define XFS_DADDR_TO_AGNO(mp,d)         xfs_daddr_to_agno(mp,d)
 561 static inline xfs_agnumber_t
 562 xfs_daddr_to_agno(struct xfs_mount *mp, xfs_daddr_t d)
 563 {
 564         xfs_daddr_t ld = XFS_BB_TO_FSBT(mp, d);
 565         do_div(ld, mp->m_sb.sb_agblocks);
 566         return (xfs_agnumber_t) ld;
 567 }
 568
 569 #define XFS_DADDR_TO_AGBNO(mp,d)        xfs_daddr_to_agbno(mp,d)
 570 static inline xfs_agblock_t
 571 xfs_daddr_to_agbno(struct xfs_mount *mp, xfs_daddr_t d)
 572 {
 573         xfs_daddr_t ld = XFS_BB_TO_FSBT(mp, d);
 574         return (xfs_agblock_t) do_div(ld, mp->m_sb.sb_agblocks);
 575 }
 576
 577 /*
 578  * perag get/put wrappers for eventual ref counting
 579  */
 580 static inline xfs_perag_t *
 581 xfs_get_perag(struct xfs_mount *mp, xfs_ino_t ino)
 582 {
 583         return &mp->m_perag[XFS_INO_TO_AGNO(mp, ino)];
 584 }
 585
 586 static inline void
 587 xfs_put_perag(struct xfs_mount *mp, xfs_perag_t *pag)
 588 {
 589         /* nothing to see here, move along */
 590 }
 591
 592 /*
 593  * Per-cpu superblock locking functions
 594  */
 595 #ifdef HAVE_PERCPU_SB
 596 STATIC_INLINE void
 597 xfs_icsb_lock(xfs_mount_t *mp)
 598 {
 599         mutex_lock(&mp->m_icsb_mutex);
 600 }
 601
 602 STATIC_INLINE void
 603 xfs_icsb_unlock(xfs_mount_t *mp)
 604 {
 605         mutex_unlock(&mp->m_icsb_mutex);
 606 }
 607 #else
 608 #define xfs_icsb_lock(mp)
 609 #define xfs_icsb_unlock(mp)
 610 #endif
 611
 612 /*
 613  * This structure is for use by the xfs_mod_incore_sb_batch() routine.
 614  * xfs_growfs can specify a few fields which are more than int limit
 615  */
 616 typedef struct xfs_mod_sb {
 617         xfs_sb_field_t  msb_field;      /* Field to modify, see below */
 618         int64_t         msb_delta;      /* Change to make to specified field */
 619 } xfs_mod_sb_t;
 620
 621 #define XFS_MOUNT_ILOCK(mp)     mutex_lock(&((mp)->m_ilock))
 622 #define XFS_MOUNT_IUNLOCK(mp)   mutex_unlock(&((mp)->m_ilock))
 623 #define XFS_SB_LOCK(mp)         mutex_spinlock(&(mp)->m_sb_lock)
 624 #define XFS_SB_UNLOCK(mp,s)     mutex_spinunlock(&(mp)->m_sb_lock,(s))
 625
 626 extern xfs_mount_t *xfs_mount_init(void);
 627 extern void     xfs_mod_sb(xfs_trans_t *, __int64_t);
 628 extern int      xfs_log_sbcount(xfs_mount_t *, uint);
 629 extern void     xfs_mount_free(xfs_mount_t *mp);
 630 extern int      xfs_mountfs(struct bhv_vfs *, xfs_mount_t *mp, int);
 631 extern void     xfs_mountfs_check_barriers(xfs_mount_t *mp);
 632
 633 extern int      xfs_unmountfs(xfs_mount_t *, struct cred *);
 634 extern void     xfs_unmountfs_close(xfs_mount_t *, struct cred *);
 635 extern int      xfs_unmountfs_writesb(xfs_mount_t *);
 636 extern int      xfs_unmount_flush(xfs_mount_t *, int);
 637 extern int      xfs_mod_incore_sb(xfs_mount_t *, xfs_sb_field_t, int64_t, int);
 638 extern int      xfs_mod_incore_sb_unlocked(xfs_mount_t *, xfs_sb_field_t,
 639                         int64_t, int);
 640 extern int      xfs_mod_incore_sb_batch(xfs_mount_t *, xfs_mod_sb_t *,
 641                         uint, int);
 642 extern struct xfs_buf *xfs_getsb(xfs_mount_t *, int);
 643 extern int      xfs_readsb(xfs_mount_t *, int);
 644 extern void     xfs_freesb(xfs_mount_t *);
 645 extern int      xfs_fs_writable(xfs_mount_t *);
 646 extern int      xfs_syncsub(xfs_mount_t *, int, int *);
 647 extern int      xfs_sync_inodes(xfs_mount_t *, int, int *);
 648 extern xfs_agnumber_t   xfs_initialize_perag(struct bhv_vfs *, xfs_mount_t *,
 649                                                 xfs_agnumber_t);
 650 extern void     xfs_sb_from_disk(struct xfs_sb *, struct xfs_dsb *);
 651 extern void     xfs_sb_to_disk(struct xfs_dsb *, struct xfs_sb *, __int64_t);
 652 extern int      xfs_sb_validate_fsb_count(struct xfs_sb *, __uint64_t);
 653
 654 extern int      xfs_dmops_get(struct xfs_mount *, struct xfs_mount_args *);
 655 extern void     xfs_dmops_put(struct xfs_mount *);
 656 extern int      xfs_qmops_get(struct xfs_mount *, struct xfs_mount_args *);
 657 extern void     xfs_qmops_put(struct xfs_mount *);
 658
 659 extern struct xfs_dmops xfs_dmcore_xfs;
 660 extern struct xfs_ioops xfs_iocore_xfs;
 661
 662 extern int      xfs_init(void);
 663 extern void     xfs_cleanup(void);
 664
 665 #endif  /* __KERNEL__ */
 666
 667 #endif  /* __XFS_MOUNT_H__ */