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 typedef int     (*xfs_quotactl_t)(struct xfs_mount *, int, int, xfs_caddr_t);
 140
 141 typedef struct xfs_qmops {
 142         xfs_qminit_t            xfs_qminit;
 143         xfs_qmdone_t            xfs_qmdone;
 144         xfs_qmmount_t           xfs_qmmount;
 145         xfs_qmunmount_t         xfs_qmunmount;
 146         xfs_dqrele_t            xfs_dqrele;
 147         xfs_dqattach_t          xfs_dqattach;
 148         xfs_dqdetach_t          xfs_dqdetach;
 149         xfs_dqpurgeall_t        xfs_dqpurgeall;
 150         xfs_dqvopalloc_t        xfs_dqvopalloc;
 151         xfs_dqvopcreate_t       xfs_dqvopcreate;
 152         xfs_dqvoprename_t       xfs_dqvoprename;
 153         xfs_dqvopchown_t        xfs_dqvopchown;
 154         xfs_dqvopchownresv_t    xfs_dqvopchownresv;
 155         xfs_dqstatvfs_t         xfs_dqstatvfs;
 156         xfs_dqsync_t            xfs_dqsync;
 157         xfs_quotactl_t          xfs_quotactl;
 158         struct xfs_dqtrxops     *xfs_dqtrxops;
 159 } xfs_qmops_t;
 160
 161 #define XFS_QM_INIT(mp, mnt, fl) \
 162         (*(mp)->m_qm_ops->xfs_qminit)(mp, mnt, fl)
 163 #define XFS_QM_MOUNT(mp, mnt, fl) \
 164         (*(mp)->m_qm_ops->xfs_qmmount)(mp, mnt, fl)
 165 #define XFS_QM_UNMOUNT(mp) \
 166         (*(mp)->m_qm_ops->xfs_qmunmount)(mp)
 167 #define XFS_QM_DONE(mp) \
 168         (*(mp)->m_qm_ops->xfs_qmdone)(mp)
 169 #define XFS_QM_DQRELE(mp, dq) \
 170         (*(mp)->m_qm_ops->xfs_dqrele)(dq)
 171 #define XFS_QM_DQATTACH(mp, ip, fl) \
 172         (*(mp)->m_qm_ops->xfs_dqattach)(ip, fl)
 173 #define XFS_QM_DQDETACH(mp, ip) \
 174         (*(mp)->m_qm_ops->xfs_dqdetach)(ip)
 175 #define XFS_QM_DQPURGEALL(mp, fl) \
 176         (*(mp)->m_qm_ops->xfs_dqpurgeall)(mp, fl)
 177 #define XFS_QM_DQVOPALLOC(mp, ip, uid, gid, prid, fl, dq1, dq2) \
 178         (*(mp)->m_qm_ops->xfs_dqvopalloc)(mp, ip, uid, gid, prid, fl, dq1, dq2)
 179 #define XFS_QM_DQVOPCREATE(mp, tp, ip, dq1, dq2) \
 180         (*(mp)->m_qm_ops->xfs_dqvopcreate)(tp, ip, dq1, dq2)
 181 #define XFS_QM_DQVOPRENAME(mp, ip) \
 182         (*(mp)->m_qm_ops->xfs_dqvoprename)(ip)
 183 #define XFS_QM_DQVOPCHOWN(mp, tp, ip, dqp, dq) \
 184         (*(mp)->m_qm_ops->xfs_dqvopchown)(tp, ip, dqp, dq)
 185 #define XFS_QM_DQVOPCHOWNRESV(mp, tp, ip, dq1, dq2, fl) \
 186         (*(mp)->m_qm_ops->xfs_dqvopchownresv)(tp, ip, dq1, dq2, fl)
 187 #define XFS_QM_DQSTATVFS(ip, statp) \
 188         (*(ip)->i_mount->m_qm_ops->xfs_dqstatvfs)(ip, statp)
 189 #define XFS_QM_DQSYNC(mp, flags) \
 190         (*(mp)->m_qm_ops->xfs_dqsync)(mp, flags)
 191 #define XFS_QM_QUOTACTL(mp, cmd, id, addr) \
 192         (*(mp)->m_qm_ops->xfs_quotactl)(mp, cmd, id, addr)
 193
 194 #ifdef HAVE_PERCPU_SB
 195
 196 /*
 197  * Valid per-cpu incore superblock counters. Note that if you add new counters,
 198  * you may need to define new counter disabled bit field descriptors as there
 199  * are more possible fields in the superblock that can fit in a bitfield on a
 200  * 32 bit platform. The XFS_SBS_* values for the current current counters just
 201  * fit.
 202  */
 203 typedef struct xfs_icsb_cnts {
 204         uint64_t        icsb_fdblocks;
 205         uint64_t        icsb_ifree;
 206         uint64_t        icsb_icount;
 207         unsigned long   icsb_flags;
 208 } xfs_icsb_cnts_t;
 209
 210 #define XFS_ICSB_FLAG_LOCK      (1 << 0)        /* counter lock bit */
 211
 212 #define XFS_ICSB_LAZY_COUNT     (1 << 1)        /* accuracy not needed */
 213
 214 extern int      xfs_icsb_init_counters(struct xfs_mount *);
 215 extern void     xfs_icsb_reinit_counters(struct xfs_mount *);
 216 extern void     xfs_icsb_destroy_counters(struct xfs_mount *);
 217 extern void     xfs_icsb_sync_counters(struct xfs_mount *, int);
 218 extern void     xfs_icsb_sync_counters_locked(struct xfs_mount *, int);
 219
 220 #else
 221 #define xfs_icsb_init_counters(mp)              (0)
 222 #define xfs_icsb_destroy_counters(mp)           do { } while (0)
 223 #define xfs_icsb_reinit_counters(mp)            do { } while (0)
 224 #define xfs_icsb_sync_counters(mp, flags)       do { } while (0)
 225 #define xfs_icsb_sync_counters_locked(mp, flags) do { } while (0)
 226 #endif
 227
 228 typedef struct xfs_mount {
 229         struct super_block      *m_super;
 230         xfs_tid_t               m_tid;          /* next unused tid for fs */
 231         struct xfs_ail          *m_ail;         /* fs active log item list */
 232         xfs_sb_t                m_sb;           /* copy of fs superblock */
 233         spinlock_t              m_sb_lock;      /* sb counter lock */
 234         struct xfs_buf          *m_sb_bp;       /* buffer for superblock */
 235         char                    *m_fsname;      /* filesystem name */
 236         int                     m_fsname_len;   /* strlen of fs name */
 237         char                    *m_rtname;      /* realtime device name */
 238         char                    *m_logname;     /* external log device name */
 239         int                     m_bsize;        /* fs logical block size */
 240         xfs_agnumber_t          m_agfrotor;     /* last ag where space found */
 241         xfs_agnumber_t          m_agirotor;     /* last ag dir inode alloced */
 242         spinlock_t              m_agirotor_lock;/* .. and lock protecting it */
 243         xfs_agnumber_t          m_maxagi;       /* highest inode alloc group */
 244         uint                    m_readio_log;   /* min read size log bytes */
 245         uint                    m_readio_blocks; /* min read size blocks */
 246         uint                    m_writeio_log;  /* min write size log bytes */
 247         uint                    m_writeio_blocks; /* min write size blocks */
 248         struct log              *m_log;         /* log specific stuff */
 249         int                     m_logbufs;      /* number of log buffers */
 250         int                     m_logbsize;     /* size of each log buffer */
 251         uint                    m_rsumlevels;   /* rt summary levels */
 252         uint                    m_rsumsize;     /* size of rt summary, bytes */
 253         struct xfs_inode        *m_rbmip;       /* pointer to bitmap inode */
 254         struct xfs_inode        *m_rsumip;      /* pointer to summary inode */
 255         struct xfs_inode        *m_rootip;      /* pointer to root directory */
 256         struct xfs_quotainfo    *m_quotainfo;   /* disk quota information */
 257         xfs_buftarg_t           *m_ddev_targp;  /* saves taking the address */
 258         xfs_buftarg_t           *m_logdev_targp;/* ptr to log device */
 259         xfs_buftarg_t           *m_rtdev_targp; /* ptr to rt device */
 260         __uint8_t               m_blkbit_log;   /* blocklog + NBBY */
 261         __uint8_t               m_blkbb_log;    /* blocklog - BBSHIFT */
 262         __uint8_t               m_agno_log;     /* log #ag's */
 263         __uint8_t               m_agino_log;    /* #bits for agino in inum */
 264         __uint16_t              m_inode_cluster_size;/* min inode buf size */
 265         uint                    m_blockmask;    /* sb_blocksize-1 */
 266         uint                    m_blockwsize;   /* sb_blocksize in words */
 267         uint                    m_blockwmask;   /* blockwsize-1 */
 268         uint                    m_alloc_mxr[2]; /* max alloc btree records */
 269         uint                    m_alloc_mnr[2]; /* min alloc btree records */
 270         uint                    m_bmap_dmxr[2]; /* max bmap btree records */
 271         uint                    m_bmap_dmnr[2]; /* min bmap btree records */
 272         uint                    m_inobt_mxr[2]; /* max inobt btree records */
 273         uint                    m_inobt_mnr[2]; /* min inobt btree records */
 274         uint                    m_ag_maxlevels; /* XFS_AG_MAXLEVELS */
 275         uint                    m_bm_maxlevels[2]; /* XFS_BM_MAXLEVELS */
 276         uint                    m_in_maxlevels; /* XFS_IN_MAXLEVELS */
 277         struct xfs_perag        *m_perag;       /* per-ag accounting info */
 278         struct rw_semaphore     m_peraglock;    /* lock for m_perag (pointer) */
 279         struct mutex            m_growlock;     /* growfs mutex */
 280         int                     m_fixedfsid[2]; /* unchanged for life of FS */
 281         uint                    m_dmevmask;     /* DMI events for this FS */
 282         __uint64_t              m_flags;        /* global mount flags */
 283         uint                    m_attroffset;   /* inode attribute offset */
 284         uint                    m_dir_node_ents; /* #entries in a dir danode */
 285         uint                    m_attr_node_ents; /* #entries in attr danode */
 286         int                     m_ialloc_inos;  /* inodes in inode allocation */
 287         int                     m_ialloc_blks;  /* blocks in inode allocation */
 288         int                     m_litino;       /* size of inode union area */
 289         int                     m_inoalign_mask;/* mask sb_inoalignmt if used */
 290         uint                    m_qflags;       /* quota status flags */
 291         xfs_trans_reservations_t m_reservations;/* precomputed res values */
 292         __uint64_t              m_maxicount;    /* maximum inode count */
 293         __uint64_t              m_maxioffset;   /* maximum inode offset */
 294         __uint64_t              m_resblks;      /* total reserved blocks */
 295         __uint64_t              m_resblks_avail;/* available reserved blocks */
 296 #if XFS_BIG_INUMS
 297         xfs_ino_t               m_inoadd;       /* add value for ino64_offset */
 298 #endif
 299         int                     m_dalign;       /* stripe unit */
 300         int                     m_swidth;       /* stripe width */
 301         int                     m_sinoalign;    /* stripe unit inode alignment */
 302         int                     m_attr_magicpct;/* 37% of the blocksize */
 303         int                     m_dir_magicpct; /* 37% of the dir blocksize */
 304         __uint8_t               m_sectbb_log;   /* sectlog - BBSHIFT */
 305         const struct xfs_nameops *m_dirnameops; /* vector of dir name ops */
 306         int                     m_dirblksize;   /* directory block sz--bytes */
 307         int                     m_dirblkfsbs;   /* directory block sz--fsbs */
 308         xfs_dablk_t             m_dirdatablk;   /* blockno of dir data v2 */
 309         xfs_dablk_t             m_dirleafblk;   /* blockno of dir non-data v2 */
 310         xfs_dablk_t             m_dirfreeblk;   /* blockno of dirfreeindex v2 */
 311         uint                    m_chsize;       /* size of next field */
 312         struct xfs_chash        *m_chash;       /* fs private inode per-cluster
 313                                                  * hash table */
 314         struct xfs_dmops        *m_dm_ops;      /* vector of DMI ops */
 315         struct xfs_qmops        *m_qm_ops;      /* vector of XQM ops */
 316         atomic_t                m_active_trans; /* number trans frozen */
 317 #ifdef HAVE_PERCPU_SB
 318         xfs_icsb_cnts_t         *m_sb_cnts;     /* per-cpu superblock counters */
 319         unsigned long           m_icsb_counters; /* disabled per-cpu counters */
 320         struct notifier_block   m_icsb_notifier; /* hotplug cpu notifier */
 321         struct mutex            m_icsb_mutex;   /* balancer sync lock */
 322 #endif
 323         struct xfs_mru_cache    *m_filestream;  /* per-mount filestream data */
 324         struct task_struct      *m_sync_task;   /* generalised sync thread */
 325         bhv_vfs_sync_work_t     m_sync_work;    /* work item for VFS_SYNC */
 326         struct list_head        m_sync_list;    /* sync thread work item list */
 327         spinlock_t              m_sync_lock;    /* work item list lock */
 328         int                     m_sync_seq;     /* sync thread generation no. */
 329         wait_queue_head_t       m_wait_single_sync_task;
 330         __int64_t               m_update_flags; /* sb flags we need to update
 331                                                    on the next remount,rw */
 332 } xfs_mount_t;
 333
 334 /*
 335  * Flags for m_flags.
 336  */
 337 #define XFS_MOUNT_WSYNC         (1ULL << 0)     /* for nfs - all metadata ops
 338                                                    must be synchronous except
 339                                                    for space allocations */
 340 #define XFS_MOUNT_INO64         (1ULL << 1)
 341 #define XFS_MOUNT_DMAPI         (1ULL << 2)     /* dmapi is enabled */
 342 #define XFS_MOUNT_WAS_CLEAN     (1ULL << 3)
 343 #define XFS_MOUNT_FS_SHUTDOWN   (1ULL << 4)     /* atomic stop of all filesystem
 344                                                    operations, typically for
 345                                                    disk errors in metadata */
 346 #define XFS_MOUNT_RETERR        (1ULL << 6)     /* return alignment errors to
 347                                                    user */
 348 #define XFS_MOUNT_NOALIGN       (1ULL << 7)     /* turn off stripe alignment
 349                                                    allocations */
 350 #define XFS_MOUNT_ATTR2         (1ULL << 8)     /* allow use of attr2 format */
 351 #define XFS_MOUNT_GRPID         (1ULL << 9)     /* group-ID assigned from directory */
 352 #define XFS_MOUNT_NORECOVERY    (1ULL << 10)    /* no recovery - dirty fs */
 353 #define XFS_MOUNT_DFLT_IOSIZE   (1ULL << 12)    /* set default i/o size */
 354 #define XFS_MOUNT_OSYNCISOSYNC  (1ULL << 13)    /* o_sync is REALLY o_sync */
 355                                                 /* osyncisdsync is now default*/
 356 #define XFS_MOUNT_32BITINODES   (1ULL << 14)    /* do not create inodes above
 357                                                  * 32 bits in size */
 358 #define XFS_MOUNT_SMALL_INUMS   (1ULL << 15)    /* users wants 32bit inodes */
 359 #define XFS_MOUNT_NOUUID        (1ULL << 16)    /* ignore uuid during mount */
 360 #define XFS_MOUNT_BARRIER       (1ULL << 17)
 361 #define XFS_MOUNT_IKEEP         (1ULL << 18)    /* keep empty inode clusters*/
 362 #define XFS_MOUNT_SWALLOC       (1ULL << 19)    /* turn on stripe width
 363                                                  * allocation */
 364 #define XFS_MOUNT_RDONLY        (1ULL << 20)    /* read-only fs */
 365 #define XFS_MOUNT_DIRSYNC       (1ULL << 21)    /* synchronous directory ops */
 366 #define XFS_MOUNT_COMPAT_IOSIZE (1ULL << 22)    /* don't report large preferred
 367                                                  * I/O size in stat() */
 368 #define XFS_MOUNT_NO_PERCPU_SB  (1ULL << 23)    /* don't use per-cpu superblock
 369                                                    counters */
 370 #define XFS_MOUNT_FILESTREAMS   (1ULL << 24)    /* enable the filestreams
 371                                                    allocator */
 372 #define XFS_MOUNT_NOATTR2       (1ULL << 25)    /* disable use of attr2 format */
 373
 374
 375 /*
 376  * Default minimum read and write sizes.
 377  */
 378 #define XFS_READIO_LOG_LARGE    16
 379 #define XFS_WRITEIO_LOG_LARGE   16
 380
 381 /*
 382  * Max and min values for mount-option defined I/O
 383  * preallocation sizes.
 384  */
 385 #define XFS_MAX_IO_LOG          30      /* 1G */
 386 #define XFS_MIN_IO_LOG          PAGE_SHIFT
 387
 388 /*
 389  * Synchronous read and write sizes.  This should be
 390  * better for NFSv2 wsync filesystems.
 391  */
 392 #define XFS_WSYNC_READIO_LOG    15      /* 32K */
 393 #define XFS_WSYNC_WRITEIO_LOG   14      /* 16K */
 394
 395 /*
 396  * Allow large block sizes to be reported to userspace programs if the
 397  * "largeio" mount option is used.
 398  *
 399  * If compatibility mode is specified, simply return the basic unit of caching
 400  * so that we don't get inefficient read/modify/write I/O from user apps.
 401  * Otherwise....
 402  *
 403  * If the underlying volume is a stripe, then return the stripe width in bytes
 404  * as the recommended I/O size. It is not a stripe and we've set a default
 405  * buffered I/O size, return that, otherwise return the compat default.
 406  */
 407 static inline unsigned long
 408 xfs_preferred_iosize(xfs_mount_t *mp)
 409 {
 410         if (mp->m_flags & XFS_MOUNT_COMPAT_IOSIZE)
 411                 return PAGE_CACHE_SIZE;
 412         return (mp->m_swidth ?
 413                 (mp->m_swidth << mp->m_sb.sb_blocklog) :
 414                 ((mp->m_flags & XFS_MOUNT_DFLT_IOSIZE) ?
 415                         (1 << (int)MAX(mp->m_readio_log, mp->m_writeio_log)) :
 416                         PAGE_CACHE_SIZE));
 417 }
 418
 419 #define XFS_MAXIOFFSET(mp)      ((mp)->m_maxioffset)
 420
 421 #define XFS_LAST_UNMOUNT_WAS_CLEAN(mp)  \
 422                                 ((mp)->m_flags & XFS_MOUNT_WAS_CLEAN)
 423 #define XFS_FORCED_SHUTDOWN(mp) ((mp)->m_flags & XFS_MOUNT_FS_SHUTDOWN)
 424 void xfs_do_force_shutdown(struct xfs_mount *mp, int flags, char *fname,
 425                 int lnnum);
 426 #define xfs_force_shutdown(m,f) \
 427         xfs_do_force_shutdown(m, f, __FILE__, __LINE__)
 428
 429 #define SHUTDOWN_META_IO_ERROR  0x0001  /* write attempt to metadata failed */
 430 #define SHUTDOWN_LOG_IO_ERROR   0x0002  /* write attempt to the log failed */
 431 #define SHUTDOWN_FORCE_UMOUNT   0x0004  /* shutdown from a forced unmount */
 432 #define SHUTDOWN_CORRUPT_INCORE 0x0008  /* corrupt in-memory data structures */
 433 #define SHUTDOWN_REMOTE_REQ     0x0010  /* shutdown came from remote cell */
 434 #define SHUTDOWN_DEVICE_REQ     0x0020  /* failed all paths to the device */
 435
 436 #define xfs_test_for_freeze(mp)         ((mp)->m_super->s_frozen)
 437 #define xfs_wait_for_freeze(mp,l)       vfs_check_frozen((mp)->m_super, (l))
 438
 439 /*
 440  * Flags for xfs_mountfs
 441  */
 442 #define XFS_MFSI_QUIET          0x40    /* Be silent if mount errors found */
 443
 444 static inline xfs_agnumber_t
 445 xfs_daddr_to_agno(struct xfs_mount *mp, xfs_daddr_t d)
 446 {
 447         xfs_daddr_t ld = XFS_BB_TO_FSBT(mp, d);
 448         do_div(ld, mp->m_sb.sb_agblocks);
 449         return (xfs_agnumber_t) ld;
 450 }
 451
 452 static inline xfs_agblock_t
 453 xfs_daddr_to_agbno(struct xfs_mount *mp, xfs_daddr_t d)
 454 {
 455         xfs_daddr_t ld = XFS_BB_TO_FSBT(mp, d);
 456         return (xfs_agblock_t) do_div(ld, mp->m_sb.sb_agblocks);
 457 }
 458
 459 /*
 460  * perag get/put wrappers for eventual ref counting
 461  */
 462 static inline xfs_perag_t *
 463 xfs_get_perag(struct xfs_mount *mp, xfs_ino_t ino)
 464 {
 465         return &mp->m_perag[XFS_INO_TO_AGNO(mp, ino)];
 466 }
 467
 468 static inline void
 469 xfs_put_perag(struct xfs_mount *mp, xfs_perag_t *pag)
 470 {
 471         /* nothing to see here, move along */
 472 }
 473
 474 /*
 475  * Per-cpu superblock locking functions
 476  */
 477 #ifdef HAVE_PERCPU_SB
 478 STATIC_INLINE void
 479 xfs_icsb_lock(xfs_mount_t *mp)
 480 {
 481         mutex_lock(&mp->m_icsb_mutex);
 482 }
 483
 484 STATIC_INLINE void
 485 xfs_icsb_unlock(xfs_mount_t *mp)
 486 {
 487         mutex_unlock(&mp->m_icsb_mutex);
 488 }
 489 #else
 490 #define xfs_icsb_lock(mp)
 491 #define xfs_icsb_unlock(mp)
 492 #endif
 493
 494 /*
 495  * This structure is for use by the xfs_mod_incore_sb_batch() routine.
 496  * xfs_growfs can specify a few fields which are more than int limit
 497  */
 498 typedef struct xfs_mod_sb {
 499         xfs_sb_field_t  msb_field;      /* Field to modify, see below */
 500         int64_t         msb_delta;      /* Change to make to specified field */
 501 } xfs_mod_sb_t;
 502
 503 #define XFS_MOUNT_ILOCK(mp)     mutex_lock(&((mp)->m_ilock))
 504 #define XFS_MOUNT_IUNLOCK(mp)   mutex_unlock(&((mp)->m_ilock))
 505
 506 extern int      xfs_log_sbcount(xfs_mount_t *, uint);
 507 extern int      xfs_mountfs(xfs_mount_t *mp);
 508 extern void     xfs_mountfs_check_barriers(xfs_mount_t *mp);
 509
 510 extern void     xfs_unmountfs(xfs_mount_t *);
 511 extern int      xfs_unmountfs_writesb(xfs_mount_t *);
 512 extern int      xfs_mod_incore_sb(xfs_mount_t *, xfs_sb_field_t, int64_t, int);
 513 extern int      xfs_mod_incore_sb_unlocked(xfs_mount_t *, xfs_sb_field_t,
 514                         int64_t, int);
 515 extern int      xfs_mod_incore_sb_batch(xfs_mount_t *, xfs_mod_sb_t *,
 516                         uint, int);
 517 extern int      xfs_mount_log_sb(xfs_mount_t *, __int64_t);
 518 extern struct xfs_buf *xfs_getsb(xfs_mount_t *, int);
 519 extern int      xfs_readsb(xfs_mount_t *, int);
 520 extern void     xfs_freesb(xfs_mount_t *);
 521 extern int      xfs_fs_writable(xfs_mount_t *);
 522 extern int      xfs_sb_validate_fsb_count(struct xfs_sb *, __uint64_t);
 523
 524 extern int      xfs_dmops_get(struct xfs_mount *);
 525 extern void     xfs_dmops_put(struct xfs_mount *);
 526 extern int      xfs_qmops_get(struct xfs_mount *);
 527 extern void     xfs_qmops_put(struct xfs_mount *);
 528
 529 extern struct xfs_dmops xfs_dmcore_xfs;
 530
 531 #endif  /* __KERNEL__ */
 532
 533 extern void     xfs_mod_sb(struct xfs_trans *, __int64_t);
 534 extern xfs_agnumber_t   xfs_initialize_perag(struct xfs_mount *, xfs_agnumber_t);
 535 extern void     xfs_sb_from_disk(struct xfs_sb *, struct xfs_dsb *);
 536 extern void     xfs_sb_to_disk(struct xfs_dsb *, struct xfs_sb *, __int64_t);
 537
 538 #endif  /* __XFS_MOUNT_H__ */