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         char *lo_name;
  66 };
  67
  68 struct gfs2_log_element {
  69         struct list_head le_list;
  70         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 semaphore 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 };
 102
 103 BUFFER_FNS(Pinned, pinned)
 104 TAS_BUFFER_FNS(Pinned, pinned)
 105
 106 struct gfs2_bufdata {
 107         struct buffer_head *bd_bh;
 108         struct gfs2_glock *bd_gl;
 109
 110         struct list_head bd_list_tr;
 111         struct gfs2_log_element bd_le;
 112
 113         struct gfs2_ail *bd_ail;
 114         struct list_head bd_ail_st_list;
 115         struct list_head bd_ail_gl_list;
 116 };
 117
 118 struct gfs2_glock_operations {
 119         void (*go_xmote_th) (struct gfs2_glock * gl, unsigned int state,
 120                              int flags);
 121         void (*go_xmote_bh) (struct gfs2_glock * gl);
 122         void (*go_drop_th) (struct gfs2_glock * gl);
 123         void (*go_drop_bh) (struct gfs2_glock * gl);
 124         void (*go_sync) (struct gfs2_glock * gl, int flags);
 125         void (*go_inval) (struct gfs2_glock * gl, int flags);
 126         int (*go_demote_ok) (struct gfs2_glock * gl);
 127         int (*go_lock) (struct gfs2_holder * gh);
 128         void (*go_unlock) (struct gfs2_holder * gh);
 129         void (*go_callback) (struct gfs2_glock * gl, unsigned int state);
 130         void (*go_greedy) (struct gfs2_glock * gl);
 131         int go_type;
 132 };
 133
 134 enum {
 135         /* Actions */
 136         HIF_MUTEX               = 0,
 137         HIF_PROMOTE             = 1,
 138         HIF_DEMOTE              = 2,
 139         HIF_GREEDY              = 3,
 140
 141         /* States */
 142         HIF_ALLOCED             = 4,
 143         HIF_DEALLOC             = 5,
 144         HIF_HOLDER              = 6,
 145         HIF_FIRST               = 7,
 146         HIF_RECURSE             = 8,
 147         HIF_ABORTED             = 9,
 148 };
 149
 150 struct gfs2_holder {
 151         struct list_head gh_list;
 152
 153         struct gfs2_glock *gh_gl;
 154         struct task_struct *gh_owner;
 155         unsigned int gh_state;
 156         int gh_flags;
 157
 158         int gh_error;
 159         unsigned long gh_iflags;
 160         struct completion gh_wait;
 161 };
 162
 163 enum {
 164         GLF_PLUG                = 0,
 165         GLF_LOCK                = 1,
 166         GLF_STICKY              = 2,
 167         GLF_PREFETCH            = 3,
 168         GLF_SYNC                = 4,
 169         GLF_DIRTY               = 5,
 170         GLF_SKIP_WAITERS2       = 6,
 171         GLF_GREEDY              = 7,
 172 };
 173
 174 struct gfs2_glock {
 175         struct list_head gl_list;
 176         unsigned long gl_flags;         /* GLF_... */
 177         struct lm_lockname gl_name;
 178         struct kref gl_ref;
 179
 180         spinlock_t gl_spin;
 181
 182         unsigned int gl_state;
 183         struct list_head gl_holders;
 184         struct list_head gl_waiters1;   /* HIF_MUTEX */
 185         struct list_head gl_waiters2;   /* HIF_DEMOTE, HIF_GREEDY */
 186         struct list_head gl_waiters3;   /* HIF_PROMOTE */
 187
 188         struct gfs2_glock_operations *gl_ops;
 189
 190         struct gfs2_holder *gl_req_gh;
 191         gfs2_glop_bh_t gl_req_bh;
 192
 193         lm_lock_t *gl_lock;
 194         char *gl_lvb;
 195         atomic_t gl_lvb_count;
 196
 197         uint64_t gl_vn;
 198         unsigned long gl_stamp;
 199         void *gl_object;
 200
 201         struct gfs2_gl_hash_bucket *gl_bucket;
 202         struct list_head gl_reclaim;
 203
 204         struct gfs2_sbd *gl_sbd;
 205
 206         struct inode *gl_aspace;
 207         struct gfs2_log_element gl_le;
 208         struct list_head gl_ail_list;
 209         atomic_t gl_ail_count;
 210 };
 211
 212 struct gfs2_alloc {
 213         /* Quota stuff */
 214
 215         unsigned int al_qd_num;
 216         struct gfs2_quota_data *al_qd[4];
 217         struct gfs2_holder al_qd_ghs[4];
 218
 219         /* Filled in by the caller to gfs2_inplace_reserve() */
 220
 221         uint32_t al_requested;
 222
 223         /* Filled in by gfs2_inplace_reserve() */
 224
 225         char *al_file;
 226         unsigned int al_line;
 227         struct gfs2_holder al_ri_gh;
 228         struct gfs2_holder al_rgd_gh;
 229         struct gfs2_rgrpd *al_rgd;
 230
 231         /* Filled in by gfs2_alloc_*() */
 232
 233         uint32_t al_alloced;
 234 };
 235
 236 enum {
 237         GIF_MIN_INIT            = 0,
 238         GIF_QD_LOCKED           = 1,
 239         GIF_PAGED               = 2,
 240         GIF_SW_PAGED            = 3,
 241 };
 242
 243 struct gfs2_inode {
 244         struct gfs2_inum i_num;
 245
 246         atomic_t i_count;
 247         unsigned long i_flags;          /* GIF_... */
 248
 249         uint64_t i_vn;
 250         struct gfs2_dinode i_di;
 251
 252         struct gfs2_glock *i_gl;
 253         struct gfs2_sbd *i_sbd;
 254         struct inode *i_vnode;
 255
 256         struct gfs2_holder i_iopen_gh;
 257
 258         struct gfs2_alloc i_alloc;
 259         uint64_t i_last_rg_alloc;
 260
 261         spinlock_t i_spin;
 262         struct rw_semaphore i_rw_mutex;
 263
 264         unsigned int i_greedy;
 265         unsigned long i_last_pfault;
 266
 267         struct buffer_head *i_cache[GFS2_MAX_META_HEIGHT];
 268 };
 269
 270 enum {
 271         GFF_DID_DIRECT_ALLOC    = 0,
 272 };
 273
 274 struct gfs2_file {
 275         unsigned long f_flags;          /* GFF_... */
 276
 277         struct semaphore f_fl_mutex;
 278         struct gfs2_holder f_fl_gh;
 279
 280         struct gfs2_inode *f_inode;
 281         struct file *f_vfile;
 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_data {
 314         struct list_head qd_list;
 315         unsigned int qd_count;
 316
 317         uint32_t qd_id;
 318         unsigned long qd_flags;         /* QDF_... */
 319
 320         int64_t qd_change;
 321         int64_t qd_change_sync;
 322
 323         unsigned int qd_slot;
 324         unsigned int qd_slot_count;
 325
 326         struct buffer_head *qd_bh;
 327         struct gfs2_quota_change *qd_bh_qc;
 328         unsigned int qd_bh_count;
 329
 330         struct gfs2_glock *qd_gl;
 331         struct gfs2_quota_lvb qd_qb;
 332
 333         uint64_t qd_sync_gen;
 334         unsigned long qd_last_warn;
 335         unsigned long qd_last_touched;
 336 };
 337
 338 struct gfs2_log_buf {
 339         struct list_head lb_list;
 340         struct buffer_head *lb_bh;
 341         struct buffer_head *lb_real;
 342 };
 343
 344 struct gfs2_trans {
 345         char *tr_file;
 346         unsigned int tr_line;
 347
 348         unsigned int tr_blocks;
 349         unsigned int tr_revokes;
 350         unsigned int tr_reserved;
 351
 352         struct gfs2_holder *tr_t_gh;
 353
 354         int tr_touched;
 355
 356         unsigned int tr_num_buf;
 357         unsigned int tr_num_buf_new;
 358         unsigned int tr_num_buf_rm;
 359         struct list_head tr_list_buf;
 360
 361         unsigned int tr_num_revoke;
 362         unsigned int tr_num_revoke_rm;
 363 };
 364
 365 struct gfs2_ail {
 366         struct list_head ai_list;
 367
 368         unsigned int ai_first;
 369         struct list_head ai_ail1_list;
 370         struct list_head ai_ail2_list;
 371
 372         uint64_t ai_sync_gen;
 373 };
 374
 375 struct gfs2_jdesc {
 376         struct list_head jd_list;
 377
 378         struct gfs2_inode *jd_inode;
 379         unsigned int jd_jid;
 380         int jd_dirty;
 381
 382         unsigned int jd_blocks;
 383 };
 384
 385 #define GFS2_GLOCKD_DEFAULT     1
 386 #define GFS2_GLOCKD_MAX         16
 387
 388 #define GFS2_QUOTA_DEFAULT      GFS2_QUOTA_OFF
 389 #define GFS2_QUOTA_OFF          0
 390 #define GFS2_QUOTA_ACCOUNT      1
 391 #define GFS2_QUOTA_ON           2
 392
 393 #define GFS2_DATA_DEFAULT       GFS2_DATA_ORDERED
 394 #define GFS2_DATA_WRITEBACK     1
 395 #define GFS2_DATA_ORDERED       2
 396
 397 struct gfs2_args {
 398         char ar_lockproto[GFS2_LOCKNAME_LEN]; /* Name of the Lock Protocol */
 399         char ar_locktable[GFS2_LOCKNAME_LEN]; /* Name of the Lock Table */
 400         char ar_hostdata[GFS2_LOCKNAME_LEN]; /* Host specific data */
 401         int ar_spectator; /* Don't get a journal because we're always RO */
 402         int ar_ignore_local_fs; /* Don't optimize even if local_fs is 1 */
 403         int ar_localflocks; /* Let the VFS do flock|fcntl locks for us */
 404         int ar_localcaching; /* Local-style caching (dangerous on multihost) */
 405         int ar_debug; /* Oops on errors instead of trying to be graceful */
 406         int ar_upgrade; /* Upgrade ondisk/multihost format */
 407         unsigned int ar_num_glockd; /* Number of glockd threads */
 408         int ar_posix_acl; /* Enable posix acls */
 409         int ar_quota; /* off/account/on */
 410         int ar_suiddir; /* suiddir support */
 411         int ar_data; /* ordered/writeback */
 412 };
 413
 414 struct gfs2_tune {
 415         spinlock_t gt_spin;
 416
 417         unsigned int gt_ilimit;
 418         unsigned int gt_ilimit_tries;
 419         unsigned int gt_ilimit_min;
 420         unsigned int gt_demote_secs; /* Cache retention for unheld glock */
 421         unsigned int gt_incore_log_blocks;
 422         unsigned int gt_log_flush_secs;
 423         unsigned int gt_jindex_refresh_secs; /* Check for new journal index */
 424
 425         unsigned int gt_scand_secs;
 426         unsigned int gt_recoverd_secs;
 427         unsigned int gt_logd_secs;
 428         unsigned int gt_quotad_secs;
 429         unsigned int gt_inoded_secs;
 430
 431         unsigned int gt_quota_simul_sync; /* Max quotavals to sync at once */
 432         unsigned int gt_quota_warn_period; /* Secs between quota warn msgs */
 433         unsigned int gt_quota_scale_num; /* Numerator */
 434         unsigned int gt_quota_scale_den; /* Denominator */
 435         unsigned int gt_quota_cache_secs;
 436         unsigned int gt_quota_quantum; /* Secs between syncs to quota file */
 437         unsigned int gt_atime_quantum; /* Min secs between atime updates */
 438         unsigned int gt_new_files_jdata;
 439         unsigned int gt_new_files_directio;
 440         unsigned int gt_max_atomic_write; /* Split big writes into this size */
 441         unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */
 442         unsigned int gt_lockdump_size;
 443         unsigned int gt_stall_secs; /* Detects trouble! */
 444         unsigned int gt_complain_secs;
 445         unsigned int gt_reclaim_limit; /* Max num of glocks in reclaim list */
 446         unsigned int gt_entries_per_readdir;
 447         unsigned int gt_prefetch_secs; /* Usage window for prefetched glocks */
 448         unsigned int gt_greedy_default;
 449         unsigned int gt_greedy_quantum;
 450         unsigned int gt_greedy_max;
 451         unsigned int gt_statfs_quantum;
 452         unsigned int gt_statfs_slow;
 453 };
 454
 455 struct gfs2_gl_hash_bucket {
 456         rwlock_t hb_lock;
 457         struct list_head hb_list;
 458 };
 459
 460 enum {
 461         SDF_JOURNAL_CHECKED     = 0,
 462         SDF_JOURNAL_LIVE        = 1,
 463         SDF_SHUTDOWN            = 2,
 464         SDF_NOATIME             = 3,
 465 };
 466
 467 #define GFS2_GL_HASH_SHIFT      13
 468 #define GFS2_GL_HASH_SIZE       (1 << GFS2_GL_HASH_SHIFT)
 469 #define GFS2_GL_HASH_MASK       (GFS2_GL_HASH_SIZE - 1)
 470 #define GFS2_FSNAME_LEN         256
 471
 472 struct gfs2_sbd {
 473         struct super_block *sd_vfs;
 474         struct kobject sd_kobj;
 475         unsigned long sd_flags; /* SDF_... */
 476         struct gfs2_sb sd_sb;
 477
 478         /* Constants computed on mount */
 479
 480         uint32_t sd_fsb2bb;
 481         uint32_t sd_fsb2bb_shift;
 482         uint32_t sd_diptrs;     /* Number of pointers in a dinode */
 483         uint32_t sd_inptrs;     /* Number of pointers in a indirect block */
 484         uint32_t sd_jbsize;     /* Size of a journaled data block */
 485         uint32_t sd_hash_bsize; /* sizeof(exhash block) */
 486         uint32_t sd_hash_bsize_shift;
 487         uint32_t sd_hash_ptrs;  /* Number of pointers in a hash block */
 488         uint32_t sd_ut_per_block;
 489         uint32_t sd_qc_per_block;
 490         uint32_t sd_max_dirres; /* Max blocks needed to add a directory entry */
 491         uint32_t sd_max_height; /* Max height of a file's metadata tree */
 492         uint64_t sd_heightsize[GFS2_MAX_META_HEIGHT];
 493         uint32_t sd_max_jheight; /* Max height of journaled file's meta tree */
 494         uint64_t sd_jheightsize[GFS2_MAX_META_HEIGHT];
 495
 496         struct gfs2_args sd_args;       /* Mount arguments */
 497         struct gfs2_tune sd_tune;       /* Filesystem tuning structure */
 498
 499         /* Lock Stuff */
 500
 501         struct lm_lockstruct sd_lockstruct;
 502         struct gfs2_gl_hash_bucket sd_gl_hash[GFS2_GL_HASH_SIZE];
 503         struct list_head sd_reclaim_list;
 504         spinlock_t sd_reclaim_lock;
 505         wait_queue_head_t sd_reclaim_wq;
 506         atomic_t sd_reclaim_count;
 507         struct gfs2_holder sd_live_gh;
 508         struct gfs2_glock *sd_rename_gl;
 509         struct gfs2_glock *sd_trans_gl;
 510         struct semaphore sd_invalidate_inodes_mutex;
 511
 512         /* Inode Stuff */
 513
 514         struct gfs2_inode *sd_master_dir;
 515         struct gfs2_inode *sd_jindex;
 516         struct gfs2_inode *sd_inum_inode;
 517         struct gfs2_inode *sd_statfs_inode;
 518         struct gfs2_inode *sd_ir_inode;
 519         struct gfs2_inode *sd_sc_inode;
 520         struct gfs2_inode *sd_ut_inode;
 521         struct gfs2_inode *sd_qc_inode;
 522         struct gfs2_inode *sd_rindex;
 523         struct gfs2_inode *sd_quota_inode;
 524         struct gfs2_inode *sd_root_dir;
 525
 526         /* Inum stuff */
 527
 528         struct semaphore sd_inum_mutex;
 529
 530         /* StatFS stuff */
 531
 532         spinlock_t sd_statfs_spin;
 533         struct semaphore sd_statfs_mutex;
 534         struct gfs2_statfs_change sd_statfs_master;
 535         struct gfs2_statfs_change sd_statfs_local;
 536         unsigned long sd_statfs_sync_time;
 537
 538         /* Resource group stuff */
 539
 540         uint64_t sd_rindex_vn;
 541         spinlock_t sd_rindex_spin;
 542         struct semaphore sd_rindex_mutex;
 543         struct list_head sd_rindex_list;
 544         struct list_head sd_rindex_mru_list;
 545         struct list_head sd_rindex_recent_list;
 546         struct gfs2_rgrpd *sd_rindex_forward;
 547         unsigned int sd_rgrps;
 548
 549         /* Journal index stuff */
 550
 551         struct list_head sd_jindex_list;
 552         spinlock_t sd_jindex_spin;
 553         struct semaphore sd_jindex_mutex;
 554         unsigned int sd_journals;
 555         unsigned long sd_jindex_refresh_time;
 556
 557         struct gfs2_jdesc *sd_jdesc;
 558         struct gfs2_holder sd_journal_gh;
 559         struct gfs2_holder sd_jinode_gh;
 560
 561         struct gfs2_holder sd_ir_gh;
 562         struct gfs2_holder sd_sc_gh;
 563         struct gfs2_holder sd_ut_gh;
 564         struct gfs2_holder sd_qc_gh;
 565
 566         /* Daemon stuff */
 567
 568         struct task_struct *sd_scand_process;
 569         struct task_struct *sd_recoverd_process;
 570         struct task_struct *sd_logd_process;
 571         struct task_struct *sd_quotad_process;
 572         struct task_struct *sd_inoded_process;
 573         struct task_struct *sd_glockd_process[GFS2_GLOCKD_MAX];
 574         unsigned int sd_glockd_num;
 575
 576         /* Unlinked inode stuff */
 577
 578         struct list_head sd_unlinked_list;
 579         atomic_t sd_unlinked_count;
 580         spinlock_t sd_unlinked_spin;
 581         struct semaphore sd_unlinked_mutex;
 582
 583         unsigned int sd_unlinked_slots;
 584         unsigned int sd_unlinked_chunks;
 585         unsigned char **sd_unlinked_bitmap;
 586
 587         /* Quota stuff */
 588
 589         struct list_head sd_quota_list;
 590         atomic_t sd_quota_count;
 591         spinlock_t sd_quota_spin;
 592         struct semaphore sd_quota_mutex;
 593
 594         unsigned int sd_quota_slots;
 595         unsigned int sd_quota_chunks;
 596         unsigned char **sd_quota_bitmap;
 597
 598         uint64_t sd_quota_sync_gen;
 599         unsigned long sd_quota_sync_time;
 600
 601         /* Log stuff */
 602
 603         spinlock_t sd_log_lock;
 604         atomic_t sd_log_trans_count;
 605         wait_queue_head_t sd_log_trans_wq;
 606         atomic_t sd_log_flush_count;
 607         wait_queue_head_t sd_log_flush_wq;
 608
 609         unsigned int sd_log_blks_reserved;
 610         unsigned int sd_log_commited_buf;
 611         unsigned int sd_log_commited_revoke;
 612
 613         unsigned int sd_log_num_gl;
 614         unsigned int sd_log_num_buf;
 615         unsigned int sd_log_num_revoke;
 616         unsigned int sd_log_num_rg;
 617         unsigned int sd_log_num_databuf;
 618         struct list_head sd_log_le_gl;
 619         struct list_head sd_log_le_buf;
 620         struct list_head sd_log_le_revoke;
 621         struct list_head sd_log_le_rg;
 622         struct list_head sd_log_le_databuf;
 623
 624         unsigned int sd_log_blks_free;
 625         struct list_head sd_log_blks_list;
 626         wait_queue_head_t sd_log_blks_wait;
 627
 628         uint64_t sd_log_sequence;
 629         unsigned int sd_log_head;
 630         unsigned int sd_log_tail;
 631         uint64_t sd_log_wraps;
 632         int sd_log_idle;
 633
 634         unsigned long sd_log_flush_time;
 635         struct semaphore sd_log_flush_lock;
 636         struct list_head sd_log_flush_list;
 637
 638         unsigned int sd_log_flush_head;
 639         uint64_t sd_log_flush_wrapped;
 640
 641         struct list_head sd_ail1_list;
 642         struct list_head sd_ail2_list;
 643         uint64_t sd_ail_sync_gen;
 644
 645         /* Replay stuff */
 646
 647         struct list_head sd_revoke_list;
 648         unsigned int sd_replay_tail;
 649
 650         unsigned int sd_found_blocks;
 651         unsigned int sd_found_revokes;
 652         unsigned int sd_replayed_blocks;
 653
 654         /* For quiescing the filesystem */
 655
 656         struct gfs2_holder sd_freeze_gh;
 657         struct semaphore sd_freeze_lock;
 658         unsigned int sd_freeze_count;
 659
 660         /* Counters */
 661
 662         atomic_t sd_glock_count;
 663         atomic_t sd_glock_held_count;
 664         atomic_t sd_inode_count;
 665         atomic_t sd_bufdata_count;
 666
 667         atomic_t sd_fh2dentry_misses;
 668         atomic_t sd_reclaimed;
 669         atomic_t sd_log_flush_incore;
 670         atomic_t sd_log_flush_ondisk;
 671
 672         atomic_t sd_glock_nq_calls;
 673         atomic_t sd_glock_dq_calls;
 674         atomic_t sd_glock_prefetch_calls;
 675         atomic_t sd_lm_lock_calls;
 676         atomic_t sd_lm_unlock_calls;
 677         atomic_t sd_lm_callbacks;
 678
 679         atomic_t sd_ops_address;
 680         atomic_t sd_ops_dentry;
 681         atomic_t sd_ops_export;
 682         atomic_t sd_ops_file;
 683         atomic_t sd_ops_inode;
 684         atomic_t sd_ops_super;
 685         atomic_t sd_ops_vm;
 686
 687         char sd_fsname[GFS2_FSNAME_LEN];
 688         char sd_table_name[GFS2_FSNAME_LEN];
 689         char sd_proto_name[GFS2_FSNAME_LEN];
 690
 691         /* Debugging crud */
 692
 693         unsigned long sd_last_warning;
 694 };
 695
 696 #endif /* __INCORE_DOT_H__ */
 697