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_bmbt_irec;
  60 struct xfs_bmap_free;
  61 struct xfs_extdelta;
  62 struct xfs_swapext;
  63 struct xfs_mru_cache;
  64 struct xfs_nameops;
  65
  66 /*
  67  * Prototypes and functions for the Data Migration subsystem.
  68  */
  69
  70 typedef int     (*xfs_send_data_t)(int, struct xfs_inode *,
  71                         xfs_off_t, size_t, int, int *);
  72 typedef int     (*xfs_send_mmap_t)(struct vm_area_struct *, uint);
  73 typedef int     (*xfs_send_destroy_t)(struct xfs_inode *, dm_right_t);
  74 typedef int     (*xfs_send_namesp_t)(dm_eventtype_t, struct xfs_mount *,
  75                         struct xfs_inode *, dm_right_t,
  76                         struct xfs_inode *, dm_right_t,
  77                         const char *, const char *, mode_t, int, int);
  78 typedef int     (*xfs_send_mount_t)(struct xfs_mount *, dm_right_t,
  79                         char *, char *);
  80 typedef void    (*xfs_send_unmount_t)(struct xfs_mount *, struct xfs_inode *,
  81                         dm_right_t, mode_t, int, int);
  82
  83 typedef struct xfs_dmops {
  84         xfs_send_data_t         xfs_send_data;
  85         xfs_send_mmap_t         xfs_send_mmap;
  86         xfs_send_destroy_t      xfs_send_destroy;
  87         xfs_send_namesp_t       xfs_send_namesp;
  88         xfs_send_mount_t        xfs_send_mount;
  89         xfs_send_unmount_t      xfs_send_unmount;
  90 } xfs_dmops_t;
  91
  92 #define XFS_SEND_DATA(mp, ev,ip,off,len,fl,lock) \
  93         (*(mp)->m_dm_ops->xfs_send_data)(ev,ip,off,len,fl,lock)
  94 #define XFS_SEND_MMAP(mp, vma,fl) \
  95         (*(mp)->m_dm_ops->xfs_send_mmap)(vma,fl)
  96 #define XFS_SEND_DESTROY(mp, ip,right) \
  97         (*(mp)->m_dm_ops->xfs_send_destroy)(ip,right)
  98 #define XFS_SEND_NAMESP(mp, ev,b1,r1,b2,r2,n1,n2,mode,rval,fl) \
  99         (*(mp)->m_dm_ops->xfs_send_namesp)(ev,NULL,b1,r1,b2,r2,n1,n2,mode,rval,fl)
 100 #define XFS_SEND_PREUNMOUNT(mp,b1,r1,b2,r2,n1,n2,mode,rval,fl) \
 101         (*(mp)->m_dm_ops->xfs_send_namesp)(DM_EVENT_PREUNMOUNT,mp,b1,r1,b2,r2,n1,n2,mode,rval,fl)
 102 #define XFS_SEND_MOUNT(mp,right,path,name) \
 103         (*(mp)->m_dm_ops->xfs_send_mount)(mp,right,path,name)
 104 #define XFS_SEND_UNMOUNT(mp, ip,right,mode,rval,fl) \
 105         (*(mp)->m_dm_ops->xfs_send_unmount)(mp,ip,right,mode,rval,fl)
 106
 107
 108 /*
 109  * Prototypes and functions for the Quota Management subsystem.
 110  */
 111
 112 struct xfs_dquot;
 113 struct xfs_dqtrxops;
 114 struct xfs_quotainfo;
 115
 116 typedef int     (*xfs_qminit_t)(struct xfs_mount *, uint *, uint *);
 117 typedef int     (*xfs_qmmount_t)(struct xfs_mount *, uint, uint);
 118 typedef int     (*xfs_qmunmount_t)(struct xfs_mount *);
 119 typedef void    (*xfs_qmdone_t)(struct xfs_mount *);
 120 typedef void    (*xfs_dqrele_t)(struct xfs_dquot *);
 121 typedef int     (*xfs_dqattach_t)(struct xfs_inode *, uint);
 122 typedef void    (*xfs_dqdetach_t)(struct xfs_inode *);
 123 typedef int     (*xfs_dqpurgeall_t)(struct xfs_mount *, uint);
 124 typedef int     (*xfs_dqvopalloc_t)(struct xfs_mount *,
 125                         struct xfs_inode *, uid_t, gid_t, prid_t, uint,
 126                         struct xfs_dquot **, struct xfs_dquot **);
 127 typedef void    (*xfs_dqvopcreate_t)(struct xfs_trans *, struct xfs_inode *,
 128                         struct xfs_dquot *, struct xfs_dquot *);
 129 typedef int     (*xfs_dqvoprename_t)(struct xfs_inode **);
 130 typedef struct xfs_dquot * (*xfs_dqvopchown_t)(
 131                         struct xfs_trans *, struct xfs_inode *,
 132                         struct xfs_dquot **, struct xfs_dquot *);
 133 typedef int     (*xfs_dqvopchownresv_t)(struct xfs_trans *, struct xfs_inode *,
 134                         struct xfs_dquot *, struct xfs_dquot *, uint);
 135 typedef void    (*xfs_dqstatvfs_t)(struct xfs_inode *, bhv_statvfs_t *);
 136 typedef int     (*xfs_dqsync_t)(struct xfs_mount *, int flags);
 137 typedef int     (*xfs_quotactl_t)(struct xfs_mount *, int, int, xfs_caddr_t);
 138
 139 typedef struct xfs_qmops {
 140         xfs_qminit_t            xfs_qminit;
 141         xfs_qmdone_t            xfs_qmdone;
 142         xfs_qmmount_t           xfs_qmmount;
 143         xfs_qmunmount_t         xfs_qmunmount;
 144         xfs_dqrele_t            xfs_dqrele;
 145         xfs_dqattach_t          xfs_dqattach;
 146         xfs_dqdetach_t          xfs_dqdetach;
 147         xfs_dqpurgeall_t        xfs_dqpurgeall;
 148         xfs_dqvopalloc_t        xfs_dqvopalloc;
 149         xfs_dqvopcreate_t       xfs_dqvopcreate;
 150         xfs_dqvoprename_t       xfs_dqvoprename;
 151         xfs_dqvopchown_t        xfs_dqvopchown;
 152         xfs_dqvopchownresv_t    xfs_dqvopchownresv;
 153         xfs_dqstatvfs_t         xfs_dqstatvfs;
 154         xfs_dqsync_t            xfs_dqsync;
 155         xfs_quotactl_t          xfs_quotactl;
 156         struct xfs_dqtrxops     *xfs_dqtrxops;
 157 } xfs_qmops_t;
 158
 159 #define XFS_QM_INIT(mp, mnt, fl) \
 160         (*(mp)->m_qm_ops->xfs_qminit)(mp, mnt, fl)
 161 #define XFS_QM_MOUNT(mp, mnt, fl) \
 162         (*(mp)->m_qm_ops->xfs_qmmount)(mp, mnt, fl)
 163 #define XFS_QM_UNMOUNT(mp) \
 164         (*(mp)->m_qm_ops->xfs_qmunmount)(mp)
 165 #define XFS_QM_DONE(mp) \
 166         (*(mp)->m_qm_ops->xfs_qmdone)(mp)
 167 #define XFS_QM_DQRELE(mp, dq) \
 168         (*(mp)->m_qm_ops->xfs_dqrele)(dq)
 169 #define XFS_QM_DQATTACH(mp, ip, fl) \
 170         (*(mp)->m_qm_ops->xfs_dqattach)(ip, fl)
 171 #define XFS_QM_DQDETACH(mp, ip) \
 172         (*(mp)->m_qm_ops->xfs_dqdetach)(ip)
 173 #define XFS_QM_DQPURGEALL(mp, fl) \
 174         (*(mp)->m_qm_ops->xfs_dqpurgeall)(mp, fl)
 175 #define XFS_QM_DQVOPALLOC(mp, ip, uid, gid, prid, fl, dq1, dq2) \
 176         (*(mp)->m_qm_ops->xfs_dqvopalloc)(mp, ip, uid, gid, prid, fl, dq1, dq2)
 177 #define XFS_QM_DQVOPCREATE(mp, tp, ip, dq1, dq2) \
 178         (*(mp)->m_qm_ops->xfs_dqvopcreate)(tp, ip, dq1, dq2)
 179 #define XFS_QM_DQVOPRENAME(mp, ip) \
 180         (*(mp)->m_qm_ops->xfs_dqvoprename)(ip)
 181 #define XFS_QM_DQVOPCHOWN(mp, tp, ip, dqp, dq) \
 182         (*(mp)->m_qm_ops->xfs_dqvopchown)(tp, ip, dqp, dq)
 183 #define XFS_QM_DQVOPCHOWNRESV(mp, tp, ip, dq1, dq2, fl) \
 184         (*(mp)->m_qm_ops->xfs_dqvopchownresv)(tp, ip, dq1, dq2, fl)
 185 #define XFS_QM_DQSTATVFS(ip, statp) \
 186         (*(ip)->i_mount->m_qm_ops->xfs_dqstatvfs)(ip, statp)
 187 #define XFS_QM_DQSYNC(mp, flags) \
 188         (*(mp)->m_qm_ops->xfs_dqsync)(mp, flags)
 189 #define XFS_QM_QUOTACTL(mp, cmd, id, addr) \
 190         (*(mp)->m_qm_ops->xfs_quotactl)(mp, cmd, id, addr)
 191
 192 #ifdef HAVE_PERCPU_SB
 193
 194 /*
 195  * Valid per-cpu incore superblock counters. Note that if you add new counters,
 196  * you may need to define new counter disabled bit field descriptors as there
 197  * are more possible fields in the superblock that can fit in a bitfield on a
 198  * 32 bit platform. The XFS_SBS_* values for the current current counters just
 199  * fit.
 200  */
 201 typedef struct xfs_icsb_cnts {
 202         uint64_t        icsb_fdblocks;
 203         uint64_t        icsb_ifree;
 204         uint64_t        icsb_icount;
 205         unsigned long   icsb_flags;
 206 } xfs_icsb_cnts_t;
 207
 208 #define XFS_ICSB_FLAG_LOCK      (1 << 0)        /* counter lock bit */
 209
 210 #define XFS_ICSB_LAZY_COUNT     (1 << 1)        /* accuracy not needed */
 211
 212 extern int      xfs_icsb_init_counters(struct xfs_mount *);
 213 extern void     xfs_icsb_reinit_counters(struct xfs_mount *);
 214 extern void     xfs_icsb_destroy_counters(struct xfs_mount *);
 215 extern void     xfs_icsb_sync_counters(struct xfs_mount *, int);
 216 extern void     xfs_icsb_sync_counters_locked(struct xfs_mount *, int);
 217
 218 #else
 219 #define xfs_icsb_init_counters(mp)              (0)
 220 #define xfs_icsb_destroy_counters(mp)           do { } while (0)
 221 #define xfs_icsb_reinit_counters(mp)            do { } while (0)
 222 #define xfs_icsb_sync_counters(mp, flags)       do { } while (0)
 223 #define xfs_icsb_sync_counters_locked(mp, flags) do { } while (0)
 224 #endif
 225
 226 typedef struct xfs_ail {
 227         struct list_head        xa_ail;
 228         uint                    xa_gen;
 229         struct task_struct      *xa_task;
 230         xfs_lsn_t               xa_target;
 231 } xfs_ail_t;
 232
 233 typedef struct xfs_mount {
 234         struct super_block      *m_super;
 235         xfs_tid_t               m_tid;          /* next unused tid for fs */
 236         spinlock_t              m_ail_lock;     /* fs AIL mutex */
 237         xfs_ail_t               m_ail;          /* fs active log item list */
 238         xfs_sb_t                m_sb;           /* copy of fs superblock */
 239         spinlock_t              m_sb_lock;      /* sb counter lock */
 240         struct xfs_buf          *m_sb_bp;       /* buffer for superblock */
 241         char                    *m_fsname;      /* filesystem name */
 242         int                     m_fsname_len;   /* strlen of fs name */
 243         char                    *m_rtname;      /* realtime device name */
 244         char                    *m_logname;     /* external log device name */
 245         int                     m_bsize;        /* fs logical block size */
 246         xfs_agnumber_t          m_agfrotor;     /* last ag where space found */
 247         xfs_agnumber_t          m_agirotor;     /* last ag dir inode alloced */
 248         spinlock_t              m_agirotor_lock;/* .. and lock protecting it */
 249         xfs_agnumber_t          m_maxagi;       /* highest inode alloc group */
 250         struct xfs_inode        *m_inodes;      /* active inode list */
 251         struct list_head        m_del_inodes;   /* inodes to reclaim */
 252         mutex_t                 m_ilock;        /* inode list mutex */
 253         uint                    m_ireclaims;    /* count of calls to reclaim*/
 254         uint                    m_readio_log;   /* min read size log bytes */
 255         uint                    m_readio_blocks; /* min read size blocks */
 256         uint                    m_writeio_log;  /* min write size log bytes */
 257         uint                    m_writeio_blocks; /* min write size blocks */
 258         struct log              *m_log;         /* log specific stuff */
 259         int                     m_logbufs;      /* number of log buffers */
 260         int                     m_logbsize;     /* size of each log buffer */
 261         uint                    m_rsumlevels;   /* rt summary levels */
 262         uint                    m_rsumsize;     /* size of rt summary, bytes */
 263         struct xfs_inode        *m_rbmip;       /* pointer to bitmap inode */
 264         struct xfs_inode        *m_rsumip;      /* pointer to summary inode */
 265         struct xfs_inode        *m_rootip;      /* pointer to root directory */
 266         struct xfs_quotainfo    *m_quotainfo;   /* disk quota information */
 267         xfs_buftarg_t           *m_ddev_targp;  /* saves taking the address */
 268         xfs_buftarg_t           *m_logdev_targp;/* ptr to log device */
 269         xfs_buftarg_t           *m_rtdev_targp; /* ptr to rt device */
 270         __uint8_t               m_dircook_elog; /* log d-cookie entry bits */
 271         __uint8_t               m_blkbit_log;   /* blocklog + NBBY */
 272         __uint8_t               m_blkbb_log;    /* blocklog - BBSHIFT */
 273         __uint8_t               m_agno_log;     /* log #ag's */
 274         __uint8_t               m_agino_log;    /* #bits for agino in inum */
 275         __uint16_t              m_inode_cluster_size;/* min inode buf size */
 276         uint                    m_blockmask;    /* sb_blocksize-1 */
 277         uint                    m_blockwsize;   /* sb_blocksize in words */
 278         uint                    m_blockwmask;   /* blockwsize-1 */
 279         uint                    m_alloc_mxr[2]; /* XFS_ALLOC_BLOCK_MAXRECS */
 280         uint                    m_alloc_mnr[2]; /* XFS_ALLOC_BLOCK_MINRECS */
 281         uint                    m_bmap_dmxr[2]; /* XFS_BMAP_BLOCK_DMAXRECS */
 282         uint                    m_bmap_dmnr[2]; /* XFS_BMAP_BLOCK_DMINRECS */
 283         uint                    m_inobt_mxr[2]; /* XFS_INOBT_BLOCK_MAXRECS */
 284         uint                    m_inobt_mnr[2]; /* XFS_INOBT_BLOCK_MINRECS */
 285         uint                    m_ag_maxlevels; /* XFS_AG_MAXLEVELS */
 286         uint                    m_bm_maxlevels[2]; /* XFS_BM_MAXLEVELS */
 287         uint                    m_in_maxlevels; /* XFS_IN_MAXLEVELS */
 288         struct xfs_perag        *m_perag;       /* per-ag accounting info */
 289         struct rw_semaphore     m_peraglock;    /* lock for m_perag (pointer) */
 290         struct mutex            m_growlock;     /* growfs mutex */
 291         int                     m_fixedfsid[2]; /* unchanged for life of FS */
 292         uint                    m_dmevmask;     /* DMI events for this FS */
 293         __uint64_t              m_flags;        /* global mount flags */
 294         uint                    m_attroffset;   /* inode attribute offset */
 295         uint                    m_dir_node_ents; /* #entries in a dir danode */
 296         uint                    m_attr_node_ents; /* #entries in attr danode */
 297         int                     m_ialloc_inos;  /* inodes in inode allocation */
 298         int                     m_ialloc_blks;  /* blocks in inode allocation */
 299         int                     m_litino;       /* size of inode union area */
 300         int                     m_inoalign_mask;/* mask sb_inoalignmt if used */
 301         uint                    m_qflags;       /* quota status flags */
 302         xfs_trans_reservations_t m_reservations;/* precomputed res values */
 303         __uint64_t              m_maxicount;    /* maximum inode count */
 304         __uint64_t              m_maxioffset;   /* maximum inode offset */
 305         __uint64_t              m_resblks;      /* total reserved blocks */
 306         __uint64_t              m_resblks_avail;/* available reserved blocks */
 307 #if XFS_BIG_INUMS
 308         xfs_ino_t               m_inoadd;       /* add value for ino64_offset */
 309 #endif
 310         int                     m_dalign;       /* stripe unit */
 311         int                     m_swidth;       /* stripe width */
 312         int                     m_sinoalign;    /* stripe unit inode alignment */
 313         int                     m_attr_magicpct;/* 37% of the blocksize */
 314         int                     m_dir_magicpct; /* 37% of the dir blocksize */
 315         __uint8_t               m_mk_sharedro;  /* mark shared ro on unmount */
 316         __uint8_t               m_inode_quiesce;/* call quiesce on new inodes.
 317                                                    field governed by m_ilock */
 318         __uint8_t               m_sectbb_log;   /* sectlog - BBSHIFT */
 319         const struct xfs_nameops *m_dirnameops; /* vector of dir name ops */
 320         int                     m_dirblksize;   /* directory block sz--bytes */
 321         int                     m_dirblkfsbs;   /* directory block sz--fsbs */
 322         xfs_dablk_t             m_dirdatablk;   /* blockno of dir data v2 */
 323         xfs_dablk_t             m_dirleafblk;   /* blockno of dir non-data v2 */
 324         xfs_dablk_t             m_dirfreeblk;   /* blockno of dirfreeindex v2 */
 325         uint                    m_chsize;       /* size of next field */
 326         struct xfs_chash        *m_chash;       /* fs private inode per-cluster
 327                                                  * hash table */
 328         struct xfs_dmops        *m_dm_ops;      /* vector of DMI ops */
 329         struct xfs_qmops        *m_qm_ops;      /* vector of XQM ops */
 330         atomic_t                m_active_trans; /* number trans frozen */
 331 #ifdef HAVE_PERCPU_SB
 332         xfs_icsb_cnts_t         *m_sb_cnts;     /* per-cpu superblock counters */
 333         unsigned long           m_icsb_counters; /* disabled per-cpu counters */
 334         struct notifier_block   m_icsb_notifier; /* hotplug cpu notifier */
 335         struct mutex            m_icsb_mutex;   /* balancer sync lock */
 336 #endif
 337         struct xfs_mru_cache    *m_filestream;  /* per-mount filestream data */
 338         struct task_struct      *m_sync_task;   /* generalised sync thread */
 339         bhv_vfs_sync_work_t     m_sync_work;    /* work item for VFS_SYNC */
 340         struct list_head        m_sync_list;    /* sync thread work item list */
 341         spinlock_t              m_sync_lock;    /* work item list lock */
 342         int                     m_sync_seq;     /* sync thread generation no. */
 343         wait_queue_head_t       m_wait_single_sync_task;
 344 } xfs_mount_t;
 345
 346 /*
 347  * Flags for m_flags.
 348  */
 349 #define XFS_MOUNT_WSYNC         (1ULL << 0)     /* for nfs - all metadata ops
 350                                                    must be synchronous except
 351                                                    for space allocations */
 352 #define XFS_MOUNT_INO64         (1ULL << 1)
 353 #define XFS_MOUNT_DMAPI         (1ULL << 2)     /* dmapi is enabled */
 354 #define XFS_MOUNT_WAS_CLEAN     (1ULL << 3)
 355 #define XFS_MOUNT_FS_SHUTDOWN   (1ULL << 4)     /* atomic stop of all filesystem
 356                                                    operations, typically for
 357                                                    disk errors in metadata */
 358 #define XFS_MOUNT_RETERR        (1ULL << 6)     /* return alignment errors to
 359                                                    user */
 360 #define XFS_MOUNT_NOALIGN       (1ULL << 7)     /* turn off stripe alignment
 361                                                    allocations */
 362 #define XFS_MOUNT_ATTR2         (1ULL << 8)     /* allow use of attr2 format */
 363 #define XFS_MOUNT_GRPID         (1ULL << 9)     /* group-ID assigned from directory */
 364 #define XFS_MOUNT_NORECOVERY    (1ULL << 10)    /* no recovery - dirty fs */
 365 #define XFS_MOUNT_SHARED        (1ULL << 11)    /* shared mount */
 366 #define XFS_MOUNT_DFLT_IOSIZE   (1ULL << 12)    /* set default i/o size */
 367 #define XFS_MOUNT_OSYNCISOSYNC  (1ULL << 13)    /* o_sync is REALLY o_sync */
 368                                                 /* osyncisdsync is now default*/
 369 #define XFS_MOUNT_32BITINODES   (1ULL << 14)    /* do not create inodes above
 370                                                  * 32 bits in size */
 371 #define XFS_MOUNT_SMALL_INUMS   (1ULL << 15)    /* users wants 32bit inodes */
 372 #define XFS_MOUNT_NOUUID        (1ULL << 16)    /* ignore uuid during mount */
 373 #define XFS_MOUNT_BARRIER       (1ULL << 17)
 374 #define XFS_MOUNT_IKEEP         (1ULL << 18)    /* keep empty inode clusters*/
 375 #define XFS_MOUNT_SWALLOC       (1ULL << 19)    /* turn on stripe width
 376                                                  * allocation */
 377 #define XFS_MOUNT_RDONLY        (1ULL << 20)    /* read-only fs */
 378 #define XFS_MOUNT_DIRSYNC       (1ULL << 21)    /* synchronous directory ops */
 379 #define XFS_MOUNT_COMPAT_IOSIZE (1ULL << 22)    /* don't report large preferred
 380                                                  * I/O size in stat() */
 381 #define XFS_MOUNT_NO_PERCPU_SB  (1ULL << 23)    /* don't use per-cpu superblock
 382                                                    counters */
 383 #define XFS_MOUNT_FILESTREAMS   (1ULL << 24)    /* enable the filestreams
 384                                                    allocator */
 385 #define XFS_MOUNT_NOATTR2       (1ULL << 25)    /* disable use of attr2 format */
 386
 387
 388 /*
 389  * Default minimum read and write sizes.
 390  */
 391 #define XFS_READIO_LOG_LARGE    16
 392 #define XFS_WRITEIO_LOG_LARGE   16
 393
 394 /*
 395  * Max and min values for mount-option defined I/O
 396  * preallocation sizes.
 397  */
 398 #define XFS_MAX_IO_LOG          30      /* 1G */
 399 #define XFS_MIN_IO_LOG          PAGE_SHIFT
 400
 401 /*
 402  * Synchronous read and write sizes.  This should be
 403  * better for NFSv2 wsync filesystems.
 404  */
 405 #define XFS_WSYNC_READIO_LOG    15      /* 32K */
 406 #define XFS_WSYNC_WRITEIO_LOG   14      /* 16K */
 407
 408 /*
 409  * Allow large block sizes to be reported to userspace programs if the
 410  * "largeio" mount option is used.
 411  *
 412  * If compatibility mode is specified, simply return the basic unit of caching
 413  * so that we don't get inefficient read/modify/write I/O from user apps.
 414  * Otherwise....
 415  *
 416  * If the underlying volume is a stripe, then return the stripe width in bytes
 417  * as the recommended I/O size. It is not a stripe and we've set a default
 418  * buffered I/O size, return that, otherwise return the compat default.
 419  */
 420 static inline unsigned long
 421 xfs_preferred_iosize(xfs_mount_t *mp)
 422 {
 423         if (mp->m_flags & XFS_MOUNT_COMPAT_IOSIZE)
 424                 return PAGE_CACHE_SIZE;
 425         return (mp->m_swidth ?
 426                 (mp->m_swidth << mp->m_sb.sb_blocklog) :
 427                 ((mp->m_flags & XFS_MOUNT_DFLT_IOSIZE) ?
 428                         (1 << (int)MAX(mp->m_readio_log, mp->m_writeio_log)) :
 429                         PAGE_CACHE_SIZE));
 430 }
 431
 432 #define XFS_MAXIOFFSET(mp)      ((mp)->m_maxioffset)
 433
 434 #define XFS_LAST_UNMOUNT_WAS_CLEAN(mp)  \
 435                                 ((mp)->m_flags & XFS_MOUNT_WAS_CLEAN)
 436 #define XFS_FORCED_SHUTDOWN(mp) ((mp)->m_flags & XFS_MOUNT_FS_SHUTDOWN)
 437 void xfs_do_force_shutdown(struct xfs_mount *mp, int flags, char *fname,
 438                 int lnnum);
 439 #define xfs_force_shutdown(m,f) \
 440         xfs_do_force_shutdown(m, f, __FILE__, __LINE__)
 441
 442 /*
 443  * Flags for xfs_mountfs
 444  */
 445 #define XFS_MFSI_QUIET          0x40    /* Be silent if mount errors found */
 446
 447 #define XFS_DADDR_TO_AGNO(mp,d)         xfs_daddr_to_agno(mp,d)
 448 static inline xfs_agnumber_t
 449 xfs_daddr_to_agno(struct xfs_mount *mp, xfs_daddr_t d)
 450 {
 451         xfs_daddr_t ld = XFS_BB_TO_FSBT(mp, d);
 452         do_div(ld, mp->m_sb.sb_agblocks);
 453         return (xfs_agnumber_t) ld;
 454 }
 455
 456 #define XFS_DADDR_TO_AGBNO(mp,d)        xfs_daddr_to_agbno(mp,d)
 457 static inline xfs_agblock_t
 458 xfs_daddr_to_agbno(struct xfs_mount *mp, xfs_daddr_t d)
 459 {
 460         xfs_daddr_t ld = XFS_BB_TO_FSBT(mp, d);
 461         return (xfs_agblock_t) do_div(ld, mp->m_sb.sb_agblocks);
 462 }
 463
 464 /*
 465  * perag get/put wrappers for eventual ref counting
 466  */
 467 static inline xfs_perag_t *
 468 xfs_get_perag(struct xfs_mount *mp, xfs_ino_t ino)
 469 {
 470         return &mp->m_perag[XFS_INO_TO_AGNO(mp, ino)];
 471 }
 472
 473 static inline void
 474 xfs_put_perag(struct xfs_mount *mp, xfs_perag_t *pag)
 475 {
 476         /* nothing to see here, move along */
 477 }
 478
 479 /*
 480  * Per-cpu superblock locking functions
 481  */
 482 #ifdef HAVE_PERCPU_SB
 483 STATIC_INLINE void
 484 xfs_icsb_lock(xfs_mount_t *mp)
 485 {
 486         mutex_lock(&mp->m_icsb_mutex);
 487 }
 488
 489 STATIC_INLINE void
 490 xfs_icsb_unlock(xfs_mount_t *mp)
 491 {
 492         mutex_unlock(&mp->m_icsb_mutex);
 493 }
 494 #else
 495 #define xfs_icsb_lock(mp)
 496 #define xfs_icsb_unlock(mp)
 497 #endif
 498
 499 /*
 500  * This structure is for use by the xfs_mod_incore_sb_batch() routine.
 501  * xfs_growfs can specify a few fields which are more than int limit
 502  */
 503 typedef struct xfs_mod_sb {
 504         xfs_sb_field_t  msb_field;      /* Field to modify, see below */
 505         int64_t         msb_delta;      /* Change to make to specified field */
 506 } xfs_mod_sb_t;
 507
 508 #define XFS_MOUNT_ILOCK(mp)     mutex_lock(&((mp)->m_ilock))
 509 #define XFS_MOUNT_IUNLOCK(mp)   mutex_unlock(&((mp)->m_ilock))
 510
 511 extern void     xfs_mod_sb(xfs_trans_t *, __int64_t);
 512 extern int      xfs_log_sbcount(xfs_mount_t *, uint);
 513 extern int      xfs_mountfs(xfs_mount_t *mp);
 514 extern void     xfs_mountfs_check_barriers(xfs_mount_t *mp);
 515
 516 extern void     xfs_unmountfs(xfs_mount_t *);
 517 extern int      xfs_unmountfs_writesb(xfs_mount_t *);
 518 extern int      xfs_unmount_flush(xfs_mount_t *, int);
 519 extern int      xfs_mod_incore_sb(xfs_mount_t *, xfs_sb_field_t, int64_t, int);
 520 extern int      xfs_mod_incore_sb_unlocked(xfs_mount_t *, xfs_sb_field_t,
 521                         int64_t, int);
 522 extern int      xfs_mod_incore_sb_batch(xfs_mount_t *, xfs_mod_sb_t *,
 523                         uint, int);
 524 extern struct xfs_buf *xfs_getsb(xfs_mount_t *, int);
 525 extern int      xfs_readsb(xfs_mount_t *, int);
 526 extern void     xfs_freesb(xfs_mount_t *);
 527 extern int      xfs_fs_writable(xfs_mount_t *);
 528 extern int      xfs_syncsub(xfs_mount_t *, int, int *);
 529 extern int      xfs_sync_inodes(xfs_mount_t *, int, int *);
 530 extern xfs_agnumber_t   xfs_initialize_perag(xfs_mount_t *, xfs_agnumber_t);
 531 extern void     xfs_sb_from_disk(struct xfs_sb *, struct xfs_dsb *);
 532 extern void     xfs_sb_to_disk(struct xfs_dsb *, struct xfs_sb *, __int64_t);
 533 extern int      xfs_sb_validate_fsb_count(struct xfs_sb *, __uint64_t);
 534
 535 extern int      xfs_dmops_get(struct xfs_mount *, struct xfs_mount_args *);
 536 extern void     xfs_dmops_put(struct xfs_mount *);
 537 extern int      xfs_qmops_get(struct xfs_mount *, struct xfs_mount_args *);
 538 extern void     xfs_qmops_put(struct xfs_mount *);
 539
 540 extern struct xfs_dmops xfs_dmcore_xfs;
 541
 542 #endif  /* __KERNEL__ */
 543
 544 #endif  /* __XFS_MOUNT_H__ */