fs/gfs2/incore.h

   1 /*
   2  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
   3  * Copyright (C) 2004-2005 Red Hat, Inc.  All rights reserved.
   4  *
   5  * This copyrighted material is made available to anyone wishing to use,
   6  * modify, copy, or redistribute it subject to the terms and conditions
   7  * of the GNU General Public License v.2.
   8  */
   9
  10 #ifndef __INCORE_DOT_H__
  11 #define __INCORE_DOT_H__
  12
  13 #define DIO_FORCE       0x00000001
  14 #define DIO_CLEAN       0x00000002
  15 #define DIO_DIRTY       0x00000004
  16 #define DIO_START       0x00000008
  17 #define DIO_WAIT        0x00000010
  18 #define DIO_METADATA    0x00000020
  19 #define DIO_DATA        0x00000040
  20 #define DIO_RELEASE     0x00000080
  21 #define DIO_ALL         0x00000100
  22
  23 struct gfs2_log_operations;
  24 struct gfs2_log_element;
  25 struct gfs2_bitmap;
  26 struct gfs2_rgrpd;
  27 struct gfs2_bufdata;
  28 struct gfs2_glock_operations;
  29 struct gfs2_holder;
  30 struct gfs2_glock;
  31 struct gfs2_alloc;
  32 struct gfs2_inode;
  33 struct gfs2_file;
  34 struct gfs2_revoke;
  35 struct gfs2_revoke_replay;
  36 struct gfs2_unlinked;
  37 struct gfs2_quota_data;
  38 struct gfs2_log_buf;
  39 struct gfs2_trans;
  40 struct gfs2_ail;
  41 struct gfs2_jdesc;
  42 struct gfs2_args;
  43 struct gfs2_tune;
  44 struct gfs2_gl_hash_bucket;
  45 struct gfs2_sbd;
  46
  47 typedef void (*gfs2_glop_bh_t) (struct gfs2_glock *gl, unsigned int ret);
  48
  49 /*
  50  * Structure of operations that are associated with each
  51  * type of element in the log.
  52  */
  53
  54 struct gfs2_log_operations {
  55         void (*lo_add) (struct gfs2_sbd *sdp, struct gfs2_log_element *le);
  56         void (*lo_incore_commit) (struct gfs2_sbd *sdp, struct gfs2_trans *tr);
  57         void (*lo_before_commit) (struct gfs2_sbd *sdp);
  58         void (*lo_after_commit) (struct gfs2_sbd *sdp, struct gfs2_ail *ai);
  59         void (*lo_before_scan) (struct gfs2_jdesc *jd,
  60                                 struct gfs2_log_header *head, int pass);
  61         int (*lo_scan_elements) (struct gfs2_jdesc *jd, unsigned int start,
  62                                  struct gfs2_log_descriptor *ld, __be64 *ptr,
  63                                  int pass);
  64         void (*lo_after_scan) (struct gfs2_jdesc *jd, int error, int pass);
  65         const char *lo_name;
  66 };
  67
  68 struct gfs2_log_element {
  69         struct list_head le_list;
  70         const struct gfs2_log_operations *le_ops;
  71 };
  72
  73 struct gfs2_bitmap {
  74         struct buffer_head *bi_bh;
  75         char *bi_clone;
  76         uint32_t bi_offset;
  77         uint32_t bi_start;
  78         uint32_t bi_len;
  79 };
  80
  81 struct gfs2_rgrpd {
  82         struct list_head rd_list;       /* Link with superblock */
  83         struct list_head rd_list_mru;
  84         struct list_head rd_recent;     /* Recently used rgrps */
  85         struct gfs2_glock *rd_gl;       /* Glock for this rgrp */
  86         struct gfs2_rindex rd_ri;
  87         struct gfs2_rgrp rd_rg;
  88         uint64_t rd_rg_vn;
  89         struct gfs2_bitmap *rd_bits;
  90         unsigned int rd_bh_count;
  91         struct mutex rd_mutex;
  92         uint32_t rd_free_clone;
  93         struct gfs2_log_element rd_le;
  94         uint32_t rd_last_alloc_data;
  95         uint32_t rd_last_alloc_meta;
  96         struct gfs2_sbd *rd_sbd;
  97 };
  98
  99 enum gfs2_state_bits {
 100         BH_Pinned = BH_PrivateStart,
 101         BH_Escaped = BH_PrivateStart + 1,
 102 };
 103
 104 BUFFER_FNS(Pinned, pinned)
 105 TAS_BUFFER_FNS(Pinned, pinned)
 106 BUFFER_FNS(Escaped, escaped)
 107 TAS_BUFFER_FNS(Escaped, escaped)
 108
 109 struct gfs2_bufdata {
 110         struct buffer_head *bd_bh;
 111         struct gfs2_glock *bd_gl;
 112
 113         struct list_head bd_list_tr;
 114         struct gfs2_log_element bd_le;
 115
 116         struct gfs2_ail *bd_ail;
 117         struct list_head bd_ail_st_list;
 118         struct list_head bd_ail_gl_list;
 119 };
 120
 121 struct gfs2_glock_operations {
 122         void (*go_xmote_th) (struct gfs2_glock * gl, unsigned int state,
 123                              int flags);
 124         void (*go_xmote_bh) (struct gfs2_glock * gl);
 125         void (*go_drop_th) (struct gfs2_glock * gl);
 126         void (*go_drop_bh) (struct gfs2_glock * gl);
 127         void (*go_sync) (struct gfs2_glock * gl, int flags);
 128         void (*go_inval) (struct gfs2_glock * gl, int flags);
 129         int (*go_demote_ok) (struct gfs2_glock * gl);
 130         int (*go_lock) (struct gfs2_holder * gh);
 131         void (*go_unlock) (struct gfs2_holder * gh);
 132         void (*go_callback) (struct gfs2_glock * gl, unsigned int state);
 133         void (*go_greedy) (struct gfs2_glock * gl);
 134         int go_type;
 135 };
 136
 137 enum {
 138         /* Actions */
 139         HIF_MUTEX               = 0,
 140         HIF_PROMOTE             = 1,
 141         HIF_DEMOTE              = 2,
 142         HIF_GREEDY              = 3,
 143
 144         /* States */
 145         HIF_ALLOCED             = 4,
 146         HIF_DEALLOC             = 5,
 147         HIF_HOLDER              = 6,
 148         HIF_FIRST               = 7,
 149         HIF_RECURSE             = 8,
 150         HIF_ABORTED             = 9,
 151 };
 152
 153 struct gfs2_holder {
 154         struct list_head gh_list;
 155
 156         struct gfs2_glock *gh_gl;
 157         struct task_struct *gh_owner;
 158         unsigned int gh_state;
 159         unsigned gh_flags;
 160
 161         int gh_error;
 162         unsigned long gh_iflags;
 163         struct completion gh_wait;
 164         unsigned long gh_ip;
 165 };
 166
 167 enum {
 168         GLF_PLUG                = 0,
 169         GLF_LOCK                = 1,
 170         GLF_STICKY              = 2,
 171         GLF_PREFETCH            = 3,
 172         GLF_SYNC                = 4,
 173         GLF_DIRTY               = 5,
 174         GLF_SKIP_WAITERS2       = 6,
 175         GLF_GREEDY              = 7,
 176 };
 177
 178 struct gfs2_glock {
 179         struct list_head gl_list;
 180         unsigned long gl_flags;         /* GLF_... */
 181         struct lm_lockname gl_name;
 182         struct kref gl_ref;
 183
 184         spinlock_t gl_spin;
 185
 186         unsigned int gl_state;
 187         struct list_head gl_holders;
 188         struct list_head gl_waiters1;   /* HIF_MUTEX */
 189         struct list_head gl_waiters2;   /* HIF_DEMOTE, HIF_GREEDY */
 190         struct list_head gl_waiters3;   /* HIF_PROMOTE */
 191
 192         struct gfs2_glock_operations *gl_ops;
 193
 194         struct gfs2_holder *gl_req_gh;
 195         gfs2_glop_bh_t gl_req_bh;
 196
 197         lm_lock_t *gl_lock;
 198         char *gl_lvb;
 199         atomic_t gl_lvb_count;
 200
 201         uint64_t gl_vn;
 202         unsigned long gl_stamp;
 203         void *gl_object;
 204
 205         struct gfs2_gl_hash_bucket *gl_bucket;
 206         struct list_head gl_reclaim;
 207
 208         struct gfs2_sbd *gl_sbd;
 209
 210         struct inode *gl_aspace;
 211         struct gfs2_log_element gl_le;
 212         struct list_head gl_ail_list;
 213         atomic_t gl_ail_count;
 214 };
 215
 216 struct gfs2_alloc {
 217         /* Quota stuff */
 218
 219         unsigned int al_qd_num;
 220         struct gfs2_quota_data *al_qd[4];
 221         struct gfs2_holder al_qd_ghs[4];
 222
 223         /* Filled in by the caller to gfs2_inplace_reserve() */
 224
 225         uint32_t al_requested;
 226
 227         /* Filled in by gfs2_inplace_reserve() */
 228
 229         char *al_file;
 230         unsigned int al_line;
 231         struct gfs2_holder al_ri_gh;
 232         struct gfs2_holder al_rgd_gh;
 233         struct gfs2_rgrpd *al_rgd;
 234
 235         /* Filled in by gfs2_alloc_*() */
 236
 237         uint32_t al_alloced;
 238 };
 239
 240 enum {
 241         GIF_MIN_INIT            = 0,
 242         GIF_QD_LOCKED           = 1,
 243         GIF_PAGED               = 2,
 244         GIF_SW_PAGED            = 3,
 245 };
 246
 247 struct gfs2_inode {
 248         struct gfs2_inum i_num;
 249
 250         atomic_t i_count;
 251         unsigned long i_flags;          /* GIF_... */
 252
 253         uint64_t i_vn;
 254         struct gfs2_dinode i_di;
 255
 256         struct gfs2_glock *i_gl;
 257         struct gfs2_sbd *i_sbd;
 258         struct inode *i_vnode;
 259
 260         struct gfs2_holder i_iopen_gh;
 261         struct gfs2_holder i_gh; /* for prepare/commit_write only */
 262         struct gfs2_alloc i_alloc;
 263         uint64_t i_last_rg_alloc;
 264
 265         spinlock_t i_spin;
 266         struct rw_semaphore i_rw_mutex;
 267
 268         unsigned int i_greedy;
 269         unsigned long i_last_pfault;
 270
 271         struct buffer_head *i_cache[GFS2_MAX_META_HEIGHT];
 272 };
 273
 274 enum {
 275         GFF_DID_DIRECT_ALLOC    = 0,
 276 };
 277
 278 struct gfs2_file {
 279         unsigned long f_flags;          /* GFF_... */
 280         struct mutex f_fl_mutex;
 281         struct gfs2_holder f_fl_gh;
 282 };
 283
 284 struct gfs2_revoke {
 285         struct gfs2_log_element rv_le;
 286         uint64_t rv_blkno;
 287 };
 288
 289 struct gfs2_revoke_replay {
 290         struct list_head rr_list;
 291         uint64_t rr_blkno;
 292         unsigned int rr_where;
 293 };
 294
 295 enum {
 296         ULF_LOCKED              = 0,
 297 };
 298
 299 struct gfs2_unlinked {
 300         struct list_head ul_list;
 301         unsigned int ul_count;
 302         struct gfs2_unlinked_tag ul_ut;
 303         unsigned long ul_flags;         /* ULF_... */
 304         unsigned int ul_slot;
 305 };
 306
 307 enum {
 308         QDF_USER                = 0,
 309         QDF_CHANGE              = 1,
 310         QDF_LOCKED              = 2,
 311 };
 312
 313 struct gfs2_quota_lvb {
 314         uint32_t qb_magic;
 315         uint32_t __pad;
 316         uint64_t qb_limit;      /* Hard limit of # blocks to alloc */
 317         uint64_t qb_warn;       /* Warn user when alloc is above this # */
 318         int64_t qb_value;       /* Current # blocks allocated */
 319 };
 320
 321 struct gfs2_quota_data {
 322         struct list_head qd_list;
 323         unsigned int qd_count;
 324
 325         uint32_t qd_id;
 326         unsigned long qd_flags;         /* QDF_... */
 327
 328         int64_t qd_change;
 329         int64_t qd_change_sync;
 330
 331         unsigned int qd_slot;
 332         unsigned int qd_slot_count;
 333
 334         struct buffer_head *qd_bh;
 335         struct gfs2_quota_change *qd_bh_qc;
 336         unsigned int qd_bh_count;
 337
 338         struct gfs2_glock *qd_gl;
 339         struct gfs2_quota_lvb qd_qb;
 340
 341         uint64_t qd_sync_gen;
 342         unsigned long qd_last_warn;
 343         unsigned long qd_last_touched;
 344 };
 345
 346 struct gfs2_log_buf {
 347         struct list_head lb_list;
 348         struct buffer_head *lb_bh;
 349         struct buffer_head *lb_real;
 350 };
 351
 352 struct gfs2_trans {
 353         unsigned long tr_ip;
 354
 355         unsigned int tr_blocks;
 356         unsigned int tr_revokes;
 357         unsigned int tr_reserved;
 358
 359         struct gfs2_holder tr_t_gh;
 360
 361         int tr_touched;
 362
 363         unsigned int tr_num_buf;
 364         unsigned int tr_num_buf_new;
 365         unsigned int tr_num_buf_rm;
 366         struct list_head tr_list_buf;
 367
 368         unsigned int tr_num_revoke;
 369         unsigned int tr_num_revoke_rm;
 370 };
 371
 372 struct gfs2_ail {
 373         struct list_head ai_list;
 374
 375         unsigned int ai_first;
 376         struct list_head ai_ail1_list;
 377         struct list_head ai_ail2_list;
 378
 379         uint64_t ai_sync_gen;
 380 };
 381
 382 struct gfs2_jdesc {
 383         struct list_head jd_list;
 384
 385         struct inode *jd_inode;
 386         unsigned int jd_jid;
 387         int jd_dirty;
 388
 389         unsigned int jd_blocks;
 390 };
 391
 392 #define GFS2_GLOCKD_DEFAULT     1
 393 #define GFS2_GLOCKD_MAX         16
 394
 395 #define GFS2_QUOTA_DEFAULT      GFS2_QUOTA_OFF
 396 #define GFS2_QUOTA_OFF          0
 397 #define GFS2_QUOTA_ACCOUNT      1
 398 #define GFS2_QUOTA_ON           2
 399
 400 #define GFS2_DATA_DEFAULT       GFS2_DATA_ORDERED
 401 #define GFS2_DATA_WRITEBACK     1
 402 #define GFS2_DATA_ORDERED       2
 403
 404 struct gfs2_args {
 405         char ar_lockproto[GFS2_LOCKNAME_LEN]; /* Name of the Lock Protocol */
 406         char ar_locktable[GFS2_LOCKNAME_LEN]; /* Name of the Lock Table */
 407         char ar_hostdata[GFS2_LOCKNAME_LEN]; /* Host specific data */
 408         int ar_spectator; /* Don't get a journal because we're always RO */
 409         int ar_ignore_local_fs; /* Don't optimize even if local_fs is 1 */
 410         int ar_localflocks; /* Let the VFS do flock|fcntl locks for us */
 411         int ar_localcaching; /* Local-style caching (dangerous on multihost) */
 412         int ar_debug; /* Oops on errors instead of trying to be graceful */
 413         int ar_upgrade; /* Upgrade ondisk/multihost format */
 414         unsigned int ar_num_glockd; /* Number of glockd threads */
 415         int ar_posix_acl; /* Enable posix acls */
 416         int ar_quota; /* off/account/on */
 417         int ar_suiddir; /* suiddir support */
 418         int ar_data; /* ordered/writeback */
 419 };
 420
 421 struct gfs2_tune {
 422         spinlock_t gt_spin;
 423
 424         unsigned int gt_ilimit;
 425         unsigned int gt_ilimit_tries;
 426         unsigned int gt_ilimit_min;
 427         unsigned int gt_demote_secs; /* Cache retention for unheld glock */
 428         unsigned int gt_incore_log_blocks;
 429         unsigned int gt_log_flush_secs;
 430         unsigned int gt_jindex_refresh_secs; /* Check for new journal index */
 431
 432         unsigned int gt_scand_secs;
 433         unsigned int gt_recoverd_secs;
 434         unsigned int gt_logd_secs;
 435         unsigned int gt_quotad_secs;
 436         unsigned int gt_inoded_secs;
 437
 438         unsigned int gt_quota_simul_sync; /* Max quotavals to sync at once */
 439         unsigned int gt_quota_warn_period; /* Secs between quota warn msgs */
 440         unsigned int gt_quota_scale_num; /* Numerator */
 441         unsigned int gt_quota_scale_den; /* Denominator */
 442         unsigned int gt_quota_cache_secs;
 443         unsigned int gt_quota_quantum; /* Secs between syncs to quota file */
 444         unsigned int gt_atime_quantum; /* Min secs between atime updates */
 445         unsigned int gt_new_files_jdata;
 446         unsigned int gt_new_files_directio;
 447         unsigned int gt_max_atomic_write; /* Split big writes into this size */
 448         unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */
 449         unsigned int gt_lockdump_size;
 450         unsigned int gt_stall_secs; /* Detects trouble! */
 451         unsigned int gt_complain_secs;
 452         unsigned int gt_reclaim_limit; /* Max num of glocks in reclaim list */
 453         unsigned int gt_entries_per_readdir;
 454         unsigned int gt_prefetch_secs; /* Usage window for prefetched glocks */
 455         unsigned int gt_greedy_default;
 456         unsigned int gt_greedy_quantum;
 457         unsigned int gt_greedy_max;
 458         unsigned int gt_statfs_quantum;
 459         unsigned int gt_statfs_slow;
 460 };
 461
 462 struct gfs2_gl_hash_bucket {
 463         rwlock_t hb_lock;
 464         struct list_head hb_list;
 465 };
 466
 467 enum {
 468         SDF_JOURNAL_CHECKED     = 0,
 469         SDF_JOURNAL_LIVE        = 1,
 470         SDF_SHUTDOWN            = 2,
 471         SDF_NOATIME             = 3,
 472 };
 473
 474 #define GFS2_GL_HASH_SHIFT      13
 475 #define GFS2_GL_HASH_SIZE       (1 << GFS2_GL_HASH_SHIFT)
 476 #define GFS2_GL_HASH_MASK       (GFS2_GL_HASH_SIZE - 1)
 477 #define GFS2_FSNAME_LEN         256
 478
 479 struct gfs2_sbd {
 480         struct super_block *sd_vfs;
 481         struct kobject sd_kobj;
 482         unsigned long sd_flags; /* SDF_... */
 483         struct gfs2_sb sd_sb;
 484
 485         /* Constants computed on mount */
 486
 487         uint32_t sd_fsb2bb;
 488         uint32_t sd_fsb2bb_shift;
 489         uint32_t sd_diptrs;     /* Number of pointers in a dinode */
 490         uint32_t sd_inptrs;     /* Number of pointers in a indirect block */
 491         uint32_t sd_jbsize;     /* Size of a journaled data block */
 492         uint32_t sd_hash_bsize; /* sizeof(exhash block) */
 493         uint32_t sd_hash_bsize_shift;
 494         uint32_t sd_hash_ptrs;  /* Number of pointers in a hash block */
 495         uint32_t sd_ut_per_block;
 496         uint32_t sd_qc_per_block;
 497         uint32_t sd_max_dirres; /* Max blocks needed to add a directory entry */
 498         uint32_t sd_max_height; /* Max height of a file's metadata tree */
 499         uint64_t sd_heightsize[GFS2_MAX_META_HEIGHT];
 500         uint32_t sd_max_jheight; /* Max height of journaled file's meta tree */
 501         uint64_t sd_jheightsize[GFS2_MAX_META_HEIGHT];
 502
 503         struct gfs2_args sd_args;       /* Mount arguments */
 504         struct gfs2_tune sd_tune;       /* Filesystem tuning structure */
 505
 506         /* Lock Stuff */
 507
 508         struct lm_lockstruct sd_lockstruct;
 509         struct gfs2_gl_hash_bucket sd_gl_hash[GFS2_GL_HASH_SIZE];
 510         struct list_head sd_reclaim_list;
 511         spinlock_t sd_reclaim_lock;
 512         wait_queue_head_t sd_reclaim_wq;
 513         atomic_t sd_reclaim_count;
 514         struct gfs2_holder sd_live_gh;
 515         struct gfs2_glock *sd_rename_gl;
 516         struct gfs2_glock *sd_trans_gl;
 517         struct mutex sd_invalidate_inodes_mutex;
 518
 519         /* Inode Stuff */
 520
 521         struct inode *sd_master_dir;
 522         struct inode *sd_jindex;
 523         struct inode *sd_inum_inode;
 524         struct inode *sd_statfs_inode;
 525         struct inode *sd_ir_inode;
 526         struct inode *sd_sc_inode;
 527         struct inode *sd_ut_inode;
 528         struct inode *sd_qc_inode;
 529         struct inode *sd_rindex;
 530         struct inode *sd_quota_inode;
 531
 532         /* Inum stuff */
 533
 534         struct mutex sd_inum_mutex;
 535
 536         /* StatFS stuff */
 537
 538         spinlock_t sd_statfs_spin;
 539         struct mutex sd_statfs_mutex;
 540         struct gfs2_statfs_change sd_statfs_master;
 541         struct gfs2_statfs_change sd_statfs_local;
 542         unsigned long sd_statfs_sync_time;
 543
 544         /* Resource group stuff */
 545
 546         uint64_t sd_rindex_vn;
 547         spinlock_t sd_rindex_spin;
 548         struct mutex sd_rindex_mutex;
 549         struct list_head sd_rindex_list;
 550         struct list_head sd_rindex_mru_list;
 551         struct list_head sd_rindex_recent_list;
 552         struct gfs2_rgrpd *sd_rindex_forward;
 553         unsigned int sd_rgrps;
 554
 555         /* Journal index stuff */
 556
 557         struct list_head sd_jindex_list;
 558         spinlock_t sd_jindex_spin;
 559         struct mutex sd_jindex_mutex;
 560         unsigned int sd_journals;
 561         unsigned long sd_jindex_refresh_time;
 562
 563         struct gfs2_jdesc *sd_jdesc;
 564         struct gfs2_holder sd_journal_gh;
 565         struct gfs2_holder sd_jinode_gh;
 566
 567         struct gfs2_holder sd_ir_gh;
 568         struct gfs2_holder sd_sc_gh;
 569         struct gfs2_holder sd_ut_gh;
 570         struct gfs2_holder sd_qc_gh;
 571
 572         /* Daemon stuff */
 573
 574         struct task_struct *sd_scand_process;
 575         struct task_struct *sd_recoverd_process;
 576         struct task_struct *sd_logd_process;
 577         struct task_struct *sd_quotad_process;
 578         struct task_struct *sd_inoded_process;
 579         struct task_struct *sd_glockd_process[GFS2_GLOCKD_MAX];
 580         unsigned int sd_glockd_num;
 581
 582         /* Unlinked inode stuff */
 583
 584         struct list_head sd_unlinked_list;
 585         atomic_t sd_unlinked_count;
 586         spinlock_t sd_unlinked_spin;
 587         struct mutex sd_unlinked_mutex;
 588
 589         unsigned int sd_unlinked_slots;
 590         unsigned int sd_unlinked_chunks;
 591         unsigned char **sd_unlinked_bitmap;
 592
 593         /* Quota stuff */
 594
 595         struct list_head sd_quota_list;
 596         atomic_t sd_quota_count;
 597         spinlock_t sd_quota_spin;
 598         struct mutex sd_quota_mutex;
 599
 600         unsigned int sd_quota_slots;
 601         unsigned int sd_quota_chunks;
 602         unsigned char **sd_quota_bitmap;
 603
 604         uint64_t sd_quota_sync_gen;
 605         unsigned long sd_quota_sync_time;
 606
 607         /* Log stuff */
 608
 609         spinlock_t sd_log_lock;
 610
 611         unsigned int sd_log_blks_reserved;
 612         unsigned int sd_log_commited_buf;
 613         unsigned int sd_log_commited_revoke;
 614
 615         unsigned int sd_log_num_gl;
 616         unsigned int sd_log_num_buf;
 617         unsigned int sd_log_num_revoke;
 618         unsigned int sd_log_num_rg;
 619         unsigned int sd_log_num_databuf;
 620         unsigned int sd_log_num_jdata;
 621         unsigned int sd_log_num_hdrs;
 622
 623         struct list_head sd_log_le_gl;
 624         struct list_head sd_log_le_buf;
 625         struct list_head sd_log_le_revoke;
 626         struct list_head sd_log_le_rg;
 627         struct list_head sd_log_le_databuf;
 628
 629         unsigned int sd_log_blks_free;
 630         struct mutex sd_log_reserve_mutex;
 631
 632         uint64_t sd_log_sequence;
 633         unsigned int sd_log_head;
 634         unsigned int sd_log_tail;
 635         int sd_log_idle;
 636
 637         unsigned long sd_log_flush_time;
 638         struct rw_semaphore sd_log_flush_lock;
 639         struct list_head sd_log_flush_list;
 640
 641         unsigned int sd_log_flush_head;
 642         uint64_t sd_log_flush_wrapped;
 643
 644         struct list_head sd_ail1_list;
 645         struct list_head sd_ail2_list;
 646         uint64_t sd_ail_sync_gen;
 647
 648         /* Replay stuff */
 649
 650         struct list_head sd_revoke_list;
 651         unsigned int sd_replay_tail;
 652
 653         unsigned int sd_found_blocks;
 654         unsigned int sd_found_revokes;
 655         unsigned int sd_replayed_blocks;
 656
 657         /* For quiescing the filesystem */
 658
 659         struct gfs2_holder sd_freeze_gh;
 660         struct mutex sd_freeze_lock;
 661         unsigned int sd_freeze_count;
 662
 663         /* Counters */
 664
 665         atomic_t sd_glock_count;
 666         atomic_t sd_glock_held_count;
 667         atomic_t sd_inode_count;
 668         atomic_t sd_reclaimed;
 669
 670         char sd_fsname[GFS2_FSNAME_LEN];
 671         char sd_table_name[GFS2_FSNAME_LEN];
 672         char sd_proto_name[GFS2_FSNAME_LEN];
 673
 674         /* Debugging crud */
 675
 676         unsigned long sd_last_warning;
 677 };
 678
 679 #endif /* __INCORE_DOT_H__ */
 680