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