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 typedef struct xfs_trans_reservations {
  22         uint    tr_write;       /* extent alloc trans */
  23         uint    tr_itruncate;   /* truncate trans */
  24         uint    tr_rename;      /* rename trans */
  25         uint    tr_link;        /* link trans */
  26         uint    tr_remove;      /* unlink trans */
  27         uint    tr_symlink;     /* symlink trans */
  28         uint    tr_create;      /* create trans */
  29         uint    tr_mkdir;       /* mkdir trans */
  30         uint    tr_ifree;       /* inode free trans */
  31         uint    tr_ichange;     /* inode update trans */
  32         uint    tr_growdata;    /* fs data section grow trans */
  33         uint    tr_swrite;      /* sync write inode trans */
  34         uint    tr_addafork;    /* cvt inode to attributed trans */
  35         uint    tr_writeid;     /* write setuid/setgid file */
  36         uint    tr_attrinval;   /* attr fork buffer invalidation */
  37         uint    tr_attrset;     /* set/create an attribute */
  38         uint    tr_attrrm;      /* remove an attribute */
  39         uint    tr_clearagi;    /* clear bad agi unlinked ino bucket */
  40         uint    tr_growrtalloc; /* grow realtime allocations */
  41         uint    tr_growrtzero;  /* grow realtime zeroing */
  42         uint    tr_growrtfree;  /* grow realtime freeing */
  43 } xfs_trans_reservations_t;
  44
  45 #ifndef __KERNEL__
  46
  47 #define xfs_daddr_to_agno(mp,d) \
  48         ((xfs_agnumber_t)(XFS_BB_TO_FSBT(mp, d) / (mp)->m_sb.sb_agblocks))
  49 #define xfs_daddr_to_agbno(mp,d) \
  50         ((xfs_agblock_t)(XFS_BB_TO_FSBT(mp, d) % (mp)->m_sb.sb_agblocks))
  51
  52 #else /* __KERNEL__ */
  53
  54 #include "xfs_sync.h"
  55
  56 struct cred;
  57 struct log;
  58 struct xfs_mount_args;
  59 struct xfs_inode;
  60 struct xfs_bmbt_irec;
  61 struct xfs_bmap_free;
  62 struct xfs_extdelta;
  63 struct xfs_swapext;
  64 struct xfs_mru_cache;
  65 struct xfs_nameops;
  66 struct xfs_ail;
  67
  68 /*
  69  * Prototypes and functions for the Data Migration subsystem.
  70  */
  71
  72 typedef int     (*xfs_send_data_t)(int, struct xfs_inode *,
  73                         xfs_off_t, size_t, int, int *);
  74 typedef int     (*xfs_send_mmap_t)(struct vm_area_struct *, uint);
  75 typedef int     (*xfs_send_destroy_t)(struct xfs_inode *, dm_right_t);
  76 typedef int     (*xfs_send_namesp_t)(dm_eventtype_t, struct xfs_mount *,
  77                         struct xfs_inode *, dm_right_t,
  78                         struct xfs_inode *, dm_right_t,
  79                         const char *, const char *, mode_t, int, int);
  80 typedef int     (*xfs_send_mount_t)(struct xfs_mount *, dm_right_t,
  81                         char *, char *);
  82 typedef void    (*xfs_send_unmount_t)(struct xfs_mount *, struct xfs_inode *,
  83                         dm_right_t, mode_t, int, int);
  84
  85 typedef struct xfs_dmops {
  86         xfs_send_data_t         xfs_send_data;
  87         xfs_send_mmap_t         xfs_send_mmap;
  88         xfs_send_destroy_t      xfs_send_destroy;
  89         xfs_send_namesp_t       xfs_send_namesp;
  90         xfs_send_mount_t        xfs_send_mount;
  91         xfs_send_unmount_t      xfs_send_unmount;
  92 } xfs_dmops_t;
  93
  94 #define XFS_SEND_DATA(mp, ev,ip,off,len,fl,lock) \
  95         (*(mp)->m_dm_ops->xfs_send_data)(ev,ip,off,len,fl,lock)
  96 #define XFS_SEND_MMAP(mp, vma,fl) \
  97         (*(mp)->m_dm_ops->xfs_send_mmap)(vma,fl)
  98 #define XFS_SEND_DESTROY(mp, ip,right) \
  99         (*(mp)->m_dm_ops->xfs_send_destroy)(ip,right)
 100 #define XFS_SEND_NAMESP(mp, ev,b1,r1,b2,r2,n1,n2,mode,rval,fl) \
 101         (*(mp)->m_dm_ops->xfs_send_namesp)(ev,NULL,b1,r1,b2,r2,n1,n2,mode,rval,fl)
 102 #define XFS_SEND_PREUNMOUNT(mp,b1,r1,b2,r2,n1,n2,mode,rval,fl) \
 103         (*(mp)->m_dm_ops->xfs_send_namesp)(DM_EVENT_PREUNMOUNT,mp,b1,r1,b2,r2,n1,n2,mode,rval,fl)
 104 #define XFS_SEND_MOUNT(mp,right,path,name) \
 105         (*(mp)->m_dm_ops->xfs_send_mount)(mp,right,path,name)
 106 #define XFS_SEND_UNMOUNT(mp, ip,right,mode,rval,fl) \
 107         (*(mp)->m_dm_ops->xfs_send_unmount)(mp,ip,right,mode,rval,fl)
 108
 109
 110 /*
 111  * Prototypes and functions for the Quota Management subsystem.
 112  */
 113
 114 struct xfs_dquot;
 115 struct xfs_dqtrxops;
 116 struct xfs_quotainfo;
 117
 118 typedef int     (*xfs_qminit_t)(struct xfs_mount *, uint *, uint *);
 119 typedef int     (*xfs_qmmount_t)(struct xfs_mount *, uint, uint);
 120 typedef void    (*xfs_qmunmount_t)(struct xfs_mount *);
 121 typedef void    (*xfs_qmdone_t)(struct xfs_mount *);
 122 typedef void    (*xfs_dqrele_t)(struct xfs_dquot *);
 123 typedef int     (*xfs_dqattach_t)(struct xfs_inode *, uint);
 124 typedef void    (*xfs_dqdetach_t)(struct xfs_inode *);
 125 typedef int     (*xfs_dqpurgeall_t)(struct xfs_mount *, uint);
 126 typedef int     (*xfs_dqvopalloc_t)(struct xfs_mount *,
 127                         struct xfs_inode *, uid_t, gid_t, prid_t, uint,
 128                         struct xfs_dquot **, struct xfs_dquot **);
 129 typedef void    (*xfs_dqvopcreate_t)(struct xfs_trans *, struct xfs_inode *,
 130                         struct xfs_dquot *, struct xfs_dquot *);
 131 typedef int     (*xfs_dqvoprename_t)(struct xfs_inode **);
 132 typedef struct xfs_dquot * (*xfs_dqvopchown_t)(
 133                         struct xfs_trans *, struct xfs_inode *,
 134                         struct xfs_dquot **, struct xfs_dquot *);
 135 typedef int     (*xfs_dqvopchownresv_t)(struct xfs_trans *, struct xfs_inode *,
 136                         struct xfs_dquot *, struct xfs_dquot *, uint);
 137 typedef void    (*xfs_dqstatvfs_t)(struct xfs_inode *, struct kstatfs *);
 138 typedef int     (*xfs_dqsync_t)(struct xfs_mount *, int flags);
 139
 140 typedef struct xfs_qmops {
 141         xfs_qminit_t            xfs_qminit;
 142         xfs_qmdone_t            xfs_qmdone;
 143         xfs_qmmount_t           xfs_qmmount;
 144         xfs_qmunmount_t         xfs_qmunmount;
 145         xfs_dqrele_t            xfs_dqrele;
 146         xfs_dqattach_t          xfs_dqattach;
 147         xfs_dqdetach_t          xfs_dqdetach;
 148         xfs_dqpurgeall_t        xfs_dqpurgeall;
 149         xfs_dqvopalloc_t        xfs_dqvopalloc;
 150         xfs_dqvopcreate_t       xfs_dqvopcreate;
 151         xfs_dqvoprename_t       xfs_dqvoprename;
 152         xfs_dqvopchown_t        xfs_dqvopchown;
 153         xfs_dqvopchownresv_t    xfs_dqvopchownresv;
 154         xfs_dqstatvfs_t         xfs_dqstatvfs;
 155         xfs_dqsync_t            xfs_dqsync;
 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
 190 #ifdef HAVE_PERCPU_SB
 191
 192 /*
 193  * Valid per-cpu incore superblock counters. Note that if you add new counters,
 194  * you may need to define new counter disabled bit field descriptors as there
 195  * are more possible fields in the superblock that can fit in a bitfield on a
 196  * 32 bit platform. The XFS_SBS_* values for the current current counters just
 197  * fit.
 198  */
 199 typedef struct xfs_icsb_cnts {
 200         uint64_t        icsb_fdblocks;
 201         uint64_t        icsb_ifree;
 202         uint64_t        icsb_icount;
 203         unsigned long   icsb_flags;
 204 } xfs_icsb_cnts_t;
 205
 206 #define XFS_ICSB_FLAG_LOCK      (1 << 0)        /* counter lock bit */
 207
 208 #define XFS_ICSB_LAZY_COUNT     (1 << 1)        /* accuracy not needed */
 209
 210 extern int      xfs_icsb_init_counters(struct xfs_mount *);
 211 extern void     xfs_icsb_reinit_counters(struct xfs_mount *);
 212 extern void     xfs_icsb_destroy_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_destroy_counters(mp)           do { } while (0)
 219 #define xfs_icsb_reinit_counters(mp)            do { } while (0)
 220 #define xfs_icsb_sync_counters(mp, flags)       do { } while (0)
 221 #define xfs_icsb_sync_counters_locked(mp, flags) do { } while (0)
 222 #endif
 223
 224 typedef struct xfs_mount {
 225         struct super_block      *m_super;
 226         xfs_tid_t               m_tid;          /* next unused tid for fs */
 227         struct xfs_ail          *m_ail;         /* fs active log item list */
 228         xfs_sb_t                m_sb;           /* copy of fs superblock */
 229         spinlock_t              m_sb_lock;      /* sb counter lock */
 230         struct xfs_buf          *m_sb_bp;       /* buffer for superblock */
 231         char                    *m_fsname;      /* filesystem name */
 232         int                     m_fsname_len;   /* strlen of fs name */
 233         char                    *m_rtname;      /* realtime device name */
 234         char                    *m_logname;     /* external log device name */
 235         int                     m_bsize;        /* fs logical block size */
 236         xfs_agnumber_t          m_agfrotor;     /* last ag where space found */
 237         xfs_agnumber_t          m_agirotor;     /* last ag dir inode alloced */
 238         spinlock_t              m_agirotor_lock;/* .. and lock protecting it */
 239         xfs_agnumber_t          m_maxagi;       /* highest inode alloc group */
 240         uint                    m_readio_log;   /* min read size log bytes */
 241         uint                    m_readio_blocks; /* min read size blocks */
 242         uint                    m_writeio_log;  /* min write size log bytes */
 243         uint                    m_writeio_blocks; /* min write size blocks */
 244         struct log              *m_log;         /* log specific stuff */
 245         int                     m_logbufs;      /* number of log buffers */
 246         int                     m_logbsize;     /* size of each log buffer */
 247         uint                    m_rsumlevels;   /* rt summary levels */
 248         uint                    m_rsumsize;     /* size of rt summary, bytes */
 249         struct xfs_inode        *m_rbmip;       /* pointer to bitmap inode */
 250         struct xfs_inode        *m_rsumip;      /* pointer to summary inode */
 251         struct xfs_inode        *m_rootip;      /* pointer to root directory */
 252         struct xfs_quotainfo    *m_quotainfo;   /* disk quota information */
 253         xfs_buftarg_t           *m_ddev_targp;  /* saves taking the address */
 254         xfs_buftarg_t           *m_logdev_targp;/* ptr to log device */
 255         xfs_buftarg_t           *m_rtdev_targp; /* ptr to rt device */
 256         __uint8_t               m_blkbit_log;   /* blocklog + NBBY */
 257         __uint8_t               m_blkbb_log;    /* blocklog - BBSHIFT */
 258         __uint8_t               m_agno_log;     /* log #ag's */
 259         __uint8_t               m_agino_log;    /* #bits for agino in inum */
 260         __uint16_t              m_inode_cluster_size;/* min inode buf size */
 261         uint                    m_blockmask;    /* sb_blocksize-1 */
 262         uint                    m_blockwsize;   /* sb_blocksize in words */
 263         uint                    m_blockwmask;   /* blockwsize-1 */
 264         uint                    m_alloc_mxr[2]; /* max alloc btree records */
 265         uint                    m_alloc_mnr[2]; /* min alloc btree records */
 266         uint                    m_bmap_dmxr[2]; /* max bmap btree records */
 267         uint                    m_bmap_dmnr[2]; /* min bmap btree records */
 268         uint                    m_inobt_mxr[2]; /* max inobt btree records */
 269         uint                    m_inobt_mnr[2]; /* min inobt btree records */
 270         uint                    m_ag_maxlevels; /* XFS_AG_MAXLEVELS */
 271         uint                    m_bm_maxlevels[2]; /* XFS_BM_MAXLEVELS */
 272         uint                    m_in_maxlevels; /* max inobt btree levels. */
 273         struct xfs_perag        *m_perag;       /* per-ag accounting info */
 274         struct rw_semaphore     m_peraglock;    /* lock for m_perag (pointer) */
 275         struct mutex            m_growlock;     /* growfs mutex */
 276         int                     m_fixedfsid[2]; /* unchanged for life of FS */
 277         uint                    m_dmevmask;     /* DMI events for this FS */
 278         __uint64_t              m_flags;        /* global mount flags */
 279         uint                    m_dir_node_ents; /* #entries in a dir danode */
 280         uint                    m_attr_node_ents; /* #entries in attr danode */
 281         int                     m_ialloc_inos;  /* inodes in inode allocation */
 282         int                     m_ialloc_blks;  /* blocks in inode allocation */
 283         int                     m_inoalign_mask;/* mask sb_inoalignmt if used */
 284         uint                    m_qflags;       /* quota status flags */
 285         xfs_trans_reservations_t m_reservations;/* precomputed res values */
 286         __uint64_t              m_maxicount;    /* maximum inode count */
 287         __uint64_t              m_maxioffset;   /* maximum inode offset */
 288         __uint64_t              m_resblks;      /* total reserved blocks */
 289         __uint64_t              m_resblks_avail;/* available reserved blocks */
 290         int                     m_dalign;       /* stripe unit */
 291         int                     m_swidth;       /* stripe width */
 292         int                     m_sinoalign;    /* stripe unit inode alignment */
 293         int                     m_attr_magicpct;/* 37% of the blocksize */
 294         int                     m_dir_magicpct; /* 37% of the dir blocksize */
 295         __uint8_t               m_sectbb_log;   /* sectlog - BBSHIFT */
 296         const struct xfs_nameops *m_dirnameops; /* vector of dir name ops */
 297         int                     m_dirblksize;   /* directory block sz--bytes */
 298         int                     m_dirblkfsbs;   /* directory block sz--fsbs */
 299         xfs_dablk_t             m_dirdatablk;   /* blockno of dir data v2 */
 300         xfs_dablk_t             m_dirleafblk;   /* blockno of dir non-data v2 */
 301         xfs_dablk_t             m_dirfreeblk;   /* blockno of dirfreeindex v2 */
 302         uint                    m_chsize;       /* size of next field */
 303         struct xfs_chash        *m_chash;       /* fs private inode per-cluster
 304                                                  * hash table */
 305         struct xfs_dmops        *m_dm_ops;      /* vector of DMI ops */
 306         struct xfs_qmops        *m_qm_ops;      /* vector of XQM ops */
 307         atomic_t                m_active_trans; /* number trans frozen */
 308 #ifdef HAVE_PERCPU_SB
 309         xfs_icsb_cnts_t         *m_sb_cnts;     /* per-cpu superblock counters */
 310         unsigned long           m_icsb_counters; /* disabled per-cpu counters */
 311         struct notifier_block   m_icsb_notifier; /* hotplug cpu notifier */
 312         struct mutex            m_icsb_mutex;   /* balancer sync lock */
 313 #endif
 314         struct xfs_mru_cache    *m_filestream;  /* per-mount filestream data */
 315         struct task_struct      *m_sync_task;   /* generalised sync thread */
 316         xfs_sync_work_t         m_sync_work;    /* work item for VFS_SYNC */
 317         struct list_head        m_sync_list;    /* sync thread work item list */
 318         spinlock_t              m_sync_lock;    /* work item list lock */
 319         int                     m_sync_seq;     /* sync thread generation no. */
 320         wait_queue_head_t       m_wait_single_sync_task;
 321         __int64_t               m_update_flags; /* sb flags we need to update
 322                                                    on the next remount,rw */
 323 } xfs_mount_t;
 324
 325 /*
 326  * Flags for m_flags.
 327  */
 328 #define XFS_MOUNT_WSYNC         (1ULL << 0)     /* for nfs - all metadata ops
 329                                                    must be synchronous except
 330                                                    for space allocations */
 331 #define XFS_MOUNT_DMAPI         (1ULL << 2)     /* dmapi is enabled */
 332 #define XFS_MOUNT_WAS_CLEAN     (1ULL << 3)
 333 #define XFS_MOUNT_FS_SHUTDOWN   (1ULL << 4)     /* atomic stop of all filesystem
 334                                                    operations, typically for
 335                                                    disk errors in metadata */
 336 #define XFS_MOUNT_RETERR        (1ULL << 6)     /* return alignment errors to
 337                                                    user */
 338 #define XFS_MOUNT_NOALIGN       (1ULL << 7)     /* turn off stripe alignment
 339                                                    allocations */
 340 #define XFS_MOUNT_ATTR2         (1ULL << 8)     /* allow use of attr2 format */
 341 #define XFS_MOUNT_GRPID         (1ULL << 9)     /* group-ID assigned from directory */
 342 #define XFS_MOUNT_NORECOVERY    (1ULL << 10)    /* no recovery - dirty fs */
 343 #define XFS_MOUNT_DFLT_IOSIZE   (1ULL << 12)    /* set default i/o size */
 344 #define XFS_MOUNT_OSYNCISOSYNC  (1ULL << 13)    /* o_sync is REALLY o_sync */
 345                                                 /* osyncisdsync is now default*/
 346 #define XFS_MOUNT_32BITINODES   (1ULL << 14)    /* do not create inodes above
 347                                                  * 32 bits in size */
 348 #define XFS_MOUNT_SMALL_INUMS   (1ULL << 15)    /* users wants 32bit inodes */
 349 #define XFS_MOUNT_NOUUID        (1ULL << 16)    /* ignore uuid during mount */
 350 #define XFS_MOUNT_BARRIER       (1ULL << 17)
 351 #define XFS_MOUNT_IKEEP         (1ULL << 18)    /* keep empty inode clusters*/
 352 #define XFS_MOUNT_SWALLOC       (1ULL << 19)    /* turn on stripe width
 353                                                  * allocation */
 354 #define XFS_MOUNT_RDONLY        (1ULL << 20)    /* read-only fs */
 355 #define XFS_MOUNT_DIRSYNC       (1ULL << 21)    /* synchronous directory ops */
 356 #define XFS_MOUNT_COMPAT_IOSIZE (1ULL << 22)    /* don't report large preferred
 357                                                  * I/O size in stat() */
 358 #define XFS_MOUNT_NO_PERCPU_SB  (1ULL << 23)    /* don't use per-cpu superblock
 359                                                    counters */
 360 #define XFS_MOUNT_FILESTREAMS   (1ULL << 24)    /* enable the filestreams
 361                                                    allocator */
 362 #define XFS_MOUNT_NOATTR2       (1ULL << 25)    /* disable use of attr2 format */
 363
 364
 365 /*
 366  * Default minimum read and write sizes.
 367  */
 368 #define XFS_READIO_LOG_LARGE    16
 369 #define XFS_WRITEIO_LOG_LARGE   16
 370
 371 /*
 372  * Max and min values for mount-option defined I/O
 373  * preallocation sizes.
 374  */
 375 #define XFS_MAX_IO_LOG          30      /* 1G */
 376 #define XFS_MIN_IO_LOG          PAGE_SHIFT
 377
 378 /*
 379  * Synchronous read and write sizes.  This should be
 380  * better for NFSv2 wsync filesystems.
 381  */
 382 #define XFS_WSYNC_READIO_LOG    15      /* 32k */
 383 #define XFS_WSYNC_WRITEIO_LOG   14      /* 16k */
 384
 385 /*
 386  * Allow large block sizes to be reported to userspace programs if the
 387  * "largeio" mount option is used.
 388  *
 389  * If compatibility mode is specified, simply return the basic unit of caching
 390  * so that we don't get inefficient read/modify/write I/O from user apps.
 391  * Otherwise....
 392  *
 393  * If the underlying volume is a stripe, then return the stripe width in bytes
 394  * as the recommended I/O size. It is not a stripe and we've set a default
 395  * buffered I/O size, return that, otherwise return the compat default.
 396  */
 397 static inline unsigned long
 398 xfs_preferred_iosize(xfs_mount_t *mp)
 399 {
 400         if (mp->m_flags & XFS_MOUNT_COMPAT_IOSIZE)
 401                 return PAGE_CACHE_SIZE;
 402         return (mp->m_swidth ?
 403                 (mp->m_swidth << mp->m_sb.sb_blocklog) :
 404                 ((mp->m_flags & XFS_MOUNT_DFLT_IOSIZE) ?
 405                         (1 << (int)MAX(mp->m_readio_log, mp->m_writeio_log)) :
 406                         PAGE_CACHE_SIZE));
 407 }
 408
 409 #define XFS_MAXIOFFSET(mp)      ((mp)->m_maxioffset)
 410
 411 #define XFS_LAST_UNMOUNT_WAS_CLEAN(mp)  \
 412                                 ((mp)->m_flags & XFS_MOUNT_WAS_CLEAN)
 413 #define XFS_FORCED_SHUTDOWN(mp) ((mp)->m_flags & XFS_MOUNT_FS_SHUTDOWN)
 414 void xfs_do_force_shutdown(struct xfs_mount *mp, int flags, char *fname,
 415                 int lnnum);
 416 #define xfs_force_shutdown(m,f) \
 417         xfs_do_force_shutdown(m, f, __FILE__, __LINE__)
 418
 419 #define SHUTDOWN_META_IO_ERROR  0x0001  /* write attempt to metadata failed */
 420 #define SHUTDOWN_LOG_IO_ERROR   0x0002  /* write attempt to the log failed */
 421 #define SHUTDOWN_FORCE_UMOUNT   0x0004  /* shutdown from a forced unmount */
 422 #define SHUTDOWN_CORRUPT_INCORE 0x0008  /* corrupt in-memory data structures */
 423 #define SHUTDOWN_REMOTE_REQ     0x0010  /* shutdown came from remote cell */
 424 #define SHUTDOWN_DEVICE_REQ     0x0020  /* failed all paths to the device */
 425
 426 #define xfs_test_for_freeze(mp)         ((mp)->m_super->s_frozen)
 427 #define xfs_wait_for_freeze(mp,l)       vfs_check_frozen((mp)->m_super, (l))
 428
 429 /*
 430  * Flags for xfs_mountfs
 431  */
 432 #define XFS_MFSI_QUIET          0x40    /* Be silent if mount errors found */
 433
 434 static inline xfs_agnumber_t
 435 xfs_daddr_to_agno(struct xfs_mount *mp, xfs_daddr_t d)
 436 {
 437         xfs_daddr_t ld = XFS_BB_TO_FSBT(mp, d);
 438         do_div(ld, mp->m_sb.sb_agblocks);
 439         return (xfs_agnumber_t) ld;
 440 }
 441
 442 static inline xfs_agblock_t
 443 xfs_daddr_to_agbno(struct xfs_mount *mp, xfs_daddr_t d)
 444 {
 445         xfs_daddr_t ld = XFS_BB_TO_FSBT(mp, d);
 446         return (xfs_agblock_t) do_div(ld, mp->m_sb.sb_agblocks);
 447 }
 448
 449 /*
 450  * perag get/put wrappers for eventual ref counting
 451  */
 452 static inline xfs_perag_t *
 453 xfs_get_perag(struct xfs_mount *mp, xfs_ino_t ino)
 454 {
 455         return &mp->m_perag[XFS_INO_TO_AGNO(mp, ino)];
 456 }
 457
 458 static inline void
 459 xfs_put_perag(struct xfs_mount *mp, xfs_perag_t *pag)
 460 {
 461         /* nothing to see here, move along */
 462 }
 463
 464 /*
 465  * Per-cpu superblock locking functions
 466  */
 467 #ifdef HAVE_PERCPU_SB
 468 STATIC_INLINE void
 469 xfs_icsb_lock(xfs_mount_t *mp)
 470 {
 471         mutex_lock(&mp->m_icsb_mutex);
 472 }
 473
 474 STATIC_INLINE void
 475 xfs_icsb_unlock(xfs_mount_t *mp)
 476 {
 477         mutex_unlock(&mp->m_icsb_mutex);
 478 }
 479 #else
 480 #define xfs_icsb_lock(mp)
 481 #define xfs_icsb_unlock(mp)
 482 #endif
 483
 484 /*
 485  * This structure is for use by the xfs_mod_incore_sb_batch() routine.
 486  * xfs_growfs can specify a few fields which are more than int limit
 487  */
 488 typedef struct xfs_mod_sb {
 489         xfs_sb_field_t  msb_field;      /* Field to modify, see below */
 490         int64_t         msb_delta;      /* Change to make to specified field */
 491 } xfs_mod_sb_t;
 492
 493 extern int      xfs_log_sbcount(xfs_mount_t *, uint);
 494 extern int      xfs_mountfs(xfs_mount_t *mp);
 495 extern void     xfs_mountfs_check_barriers(xfs_mount_t *mp);
 496
 497 extern void     xfs_unmountfs(xfs_mount_t *);
 498 extern int      xfs_unmountfs_writesb(xfs_mount_t *);
 499 extern int      xfs_mod_incore_sb(xfs_mount_t *, xfs_sb_field_t, int64_t, int);
 500 extern int      xfs_mod_incore_sb_unlocked(xfs_mount_t *, xfs_sb_field_t,
 501                         int64_t, int);
 502 extern int      xfs_mod_incore_sb_batch(xfs_mount_t *, xfs_mod_sb_t *,
 503                         uint, int);
 504 extern int      xfs_mount_log_sb(xfs_mount_t *, __int64_t);
 505 extern struct xfs_buf *xfs_getsb(xfs_mount_t *, int);
 506 extern int      xfs_readsb(xfs_mount_t *, int);
 507 extern void     xfs_freesb(xfs_mount_t *);
 508 extern int      xfs_fs_writable(xfs_mount_t *);
 509 extern int      xfs_sb_validate_fsb_count(struct xfs_sb *, __uint64_t);
 510
 511 extern int      xfs_dmops_get(struct xfs_mount *);
 512 extern void     xfs_dmops_put(struct xfs_mount *);
 513 extern int      xfs_qmops_get(struct xfs_mount *);
 514 extern void     xfs_qmops_put(struct xfs_mount *);
 515
 516 extern struct xfs_dmops xfs_dmcore_xfs;
 517
 518 #endif  /* __KERNEL__ */
 519
 520 extern void     xfs_mod_sb(struct xfs_trans *, __int64_t);
 521 extern xfs_agnumber_t   xfs_initialize_perag(struct xfs_mount *, xfs_agnumber_t);
 522 extern void     xfs_sb_from_disk(struct xfs_sb *, struct xfs_dsb *);
 523 extern void     xfs_sb_to_disk(struct xfs_dsb *, struct xfs_sb *, __int64_t);
 524
 525 #endif  /* __XFS_MOUNT_H__ */