fs/gfs2/incore.h

   1 /*
   2  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
   3  * Copyright (C) 2004-2008 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 version 2.
   8  */
   9
  10 #ifndef __INCORE_DOT_H__
  11 #define __INCORE_DOT_H__
  12
  13 #include <linux/fs.h>
  14 #include <linux/kobject.h>
  15 #include <linux/workqueue.h>
  16 #include <linux/dlm.h>
  17 #include <linux/buffer_head.h>
  18 #include <linux/rcupdate.h>
  19 #include <linux/rculist_bl.h>
  20
  21 #define DIO_WAIT        0x00000010
  22 #define DIO_METADATA    0x00000020
  23
  24 struct gfs2_log_operations;
  25 struct gfs2_log_element;
  26 struct gfs2_holder;
  27 struct gfs2_glock;
  28 struct gfs2_quota_data;
  29 struct gfs2_trans;
  30 struct gfs2_ail;
  31 struct gfs2_jdesc;
  32 struct gfs2_sbd;
  33 struct lm_lockops;
  34
  35 typedef void (*gfs2_glop_bh_t) (struct gfs2_glock *gl, unsigned int ret);
  36
  37 struct gfs2_log_header_host {
  38         u64 lh_sequence;        /* Sequence number of this transaction */
  39         u32 lh_flags;           /* GFS2_LOG_HEAD_... */
  40         u32 lh_tail;            /* Block number of log tail */
  41         u32 lh_blkno;
  42         u32 lh_hash;
  43 };
  44
  45 /*
  46  * Structure of operations that are associated with each
  47  * type of element in the log.
  48  */
  49
  50 struct gfs2_log_operations {
  51         void (*lo_add) (struct gfs2_sbd *sdp, struct gfs2_log_element *le);
  52         void (*lo_before_commit) (struct gfs2_sbd *sdp);
  53         void (*lo_after_commit) (struct gfs2_sbd *sdp, struct gfs2_ail *ai);
  54         void (*lo_before_scan) (struct gfs2_jdesc *jd,
  55                                 struct gfs2_log_header_host *head, int pass);
  56         int (*lo_scan_elements) (struct gfs2_jdesc *jd, unsigned int start,
  57                                  struct gfs2_log_descriptor *ld, __be64 *ptr,
  58                                  int pass);
  59         void (*lo_after_scan) (struct gfs2_jdesc *jd, int error, int pass);
  60         const char *lo_name;
  61 };
  62
  63 struct gfs2_log_element {
  64         struct list_head le_list;
  65         const struct gfs2_log_operations *le_ops;
  66 };
  67
  68 #define GBF_FULL 1
  69
  70 struct gfs2_bitmap {
  71         struct buffer_head *bi_bh;
  72         char *bi_clone;
  73         unsigned long bi_flags;
  74         u32 bi_offset;
  75         u32 bi_start;
  76         u32 bi_len;
  77 };
  78
  79 struct gfs2_rgrpd {
  80         struct list_head rd_list;       /* Link with superblock */
  81         struct list_head rd_list_mru;
  82         struct gfs2_glock *rd_gl;       /* Glock for this rgrp */
  83         u64 rd_addr;                    /* grp block disk address */
  84         u64 rd_data0;                   /* first data location */
  85         u32 rd_length;                  /* length of rgrp header in fs blocks */
  86         u32 rd_data;                    /* num of data blocks in rgrp */
  87         u32 rd_bitbytes;                /* number of bytes in data bitmaps */
  88         u32 rd_free;
  89         u32 rd_free_clone;
  90         u32 rd_dinodes;
  91         u64 rd_igeneration;
  92         struct gfs2_bitmap *rd_bits;
  93         struct mutex rd_mutex;
  94         struct gfs2_log_element rd_le;
  95         struct gfs2_sbd *rd_sbd;
  96         unsigned int rd_bh_count;
  97         u32 rd_last_alloc;
  98         u32 rd_flags;
  99 #define GFS2_RDF_CHECK          0x10000000 /* check for unlinked inodes */
 100 #define GFS2_RDF_UPTODATE       0x20000000 /* rg is up to date */
 101 #define GFS2_RDF_ERROR          0x40000000 /* error in rg */
 102 #define GFS2_RDF_MASK           0xf0000000 /* mask for internal flags */
 103 };
 104
 105 enum gfs2_state_bits {
 106         BH_Pinned = BH_PrivateStart,
 107         BH_Escaped = BH_PrivateStart + 1,
 108 };
 109
 110 BUFFER_FNS(Pinned, pinned)
 111 TAS_BUFFER_FNS(Pinned, pinned)
 112 BUFFER_FNS(Escaped, escaped)
 113 TAS_BUFFER_FNS(Escaped, escaped)
 114
 115 struct gfs2_bufdata {
 116         struct buffer_head *bd_bh;
 117         struct gfs2_glock *bd_gl;
 118
 119         union {
 120                 struct list_head list_tr;
 121                 u64 blkno;
 122         } u;
 123 #define bd_list_tr u.list_tr
 124 #define bd_blkno u.blkno
 125
 126         struct gfs2_log_element bd_le;
 127
 128         struct gfs2_ail *bd_ail;
 129         struct list_head bd_ail_st_list;
 130         struct list_head bd_ail_gl_list;
 131 };
 132
 133 /*
 134  * Internally, we prefix things with gdlm_ and GDLM_ (for gfs-dlm) since a
 135  * prefix of lock_dlm_ gets awkward.
 136  */
 137
 138 #define GDLM_STRNAME_BYTES      25
 139 #define GDLM_LVB_SIZE           32
 140
 141 enum {
 142         DFL_BLOCK_LOCKS         = 0,
 143 };
 144
 145 struct lm_lockname {
 146         u64 ln_number;
 147         unsigned int ln_type;
 148 };
 149
 150 #define lm_name_equal(name1, name2) \
 151         (((name1)->ln_number == (name2)->ln_number) && \
 152          ((name1)->ln_type == (name2)->ln_type))
 153
 154
 155 struct gfs2_glock_operations {
 156         void (*go_xmote_th) (struct gfs2_glock *gl);
 157         int (*go_xmote_bh) (struct gfs2_glock *gl, struct gfs2_holder *gh);
 158         void (*go_inval) (struct gfs2_glock *gl, int flags);
 159         int (*go_demote_ok) (const struct gfs2_glock *gl);
 160         int (*go_lock) (struct gfs2_holder *gh);
 161         void (*go_unlock) (struct gfs2_holder *gh);
 162         int (*go_dump)(struct seq_file *seq, const struct gfs2_glock *gl);
 163         void (*go_callback) (struct gfs2_glock *gl);
 164         const int go_type;
 165         const unsigned long go_min_hold_time;
 166         const unsigned long go_flags;
 167 #define GLOF_ASPACE 1
 168 };
 169
 170 enum {
 171         /* States */
 172         HIF_HOLDER              = 6,  /* Set for gh that "holds" the glock */
 173         HIF_FIRST               = 7,
 174         HIF_WAIT                = 10,
 175 };
 176
 177 struct gfs2_holder {
 178         struct list_head gh_list;
 179
 180         struct gfs2_glock *gh_gl;
 181         struct pid *gh_owner_pid;
 182         unsigned int gh_state;
 183         unsigned gh_flags;
 184
 185         int gh_error;
 186         unsigned long gh_iflags; /* HIF_... */
 187         unsigned long gh_ip;
 188 };
 189
 190 enum {
 191         GLF_LOCK                        = 1,
 192         GLF_DEMOTE                      = 3,
 193         GLF_PENDING_DEMOTE              = 4,
 194         GLF_DEMOTE_IN_PROGRESS          = 5,
 195         GLF_DIRTY                       = 6,
 196         GLF_LFLUSH                      = 7,
 197         GLF_INVALIDATE_IN_PROGRESS      = 8,
 198         GLF_REPLY_PENDING               = 9,
 199         GLF_INITIAL                     = 10,
 200         GLF_FROZEN                      = 11,
 201         GLF_QUEUED                      = 12,
 202         GLF_LRU                         = 13,
 203         GLF_OBJECT                      = 14, /* Used only for tracing */
 204 };
 205
 206 struct gfs2_glock {
 207         struct hlist_bl_node gl_list;
 208         unsigned long gl_flags;         /* GLF_... */
 209         struct lm_lockname gl_name;
 210         atomic_t gl_ref;
 211
 212         spinlock_t gl_spin;
 213
 214         /* State fields protected by gl_spin */
 215         unsigned int gl_state:2,        /* Current state */
 216                      gl_target:2,       /* Target state */
 217                      gl_demote_state:2, /* State requested by remote node */
 218                      gl_req:2,          /* State in last dlm request */
 219                      gl_reply:8;        /* Last reply from the dlm */
 220
 221         unsigned int gl_hash;
 222         unsigned long gl_demote_time; /* time of first demote request */
 223         struct list_head gl_holders;
 224
 225         const struct gfs2_glock_operations *gl_ops;
 226         char gl_strname[GDLM_STRNAME_BYTES];
 227         struct dlm_lksb gl_lksb;
 228         char gl_lvb[32];
 229         unsigned long gl_tchange;
 230         void *gl_object;
 231
 232         struct list_head gl_lru;
 233
 234         struct gfs2_sbd *gl_sbd;
 235
 236         struct list_head gl_ail_list;
 237         atomic_t gl_ail_count;
 238         atomic_t gl_revokes;
 239         struct delayed_work gl_work;
 240         struct work_struct gl_delete;
 241         struct rcu_head gl_rcu;
 242 };
 243
 244 #define GFS2_MIN_LVB_SIZE 32    /* Min size of LVB that gfs2 supports */
 245
 246 struct gfs2_alloc {
 247         /* Quota stuff */
 248
 249         struct gfs2_quota_data *al_qd[2*MAXQUOTAS];
 250         struct gfs2_holder al_qd_ghs[2*MAXQUOTAS];
 251         unsigned int al_qd_num;
 252
 253         u32 al_requested; /* Filled in by caller of gfs2_inplace_reserve() */
 254         u32 al_alloced; /* Filled in by gfs2_alloc_*() */
 255
 256         /* Filled in by gfs2_inplace_reserve() */
 257
 258         unsigned int al_line;
 259         char *al_file;
 260         struct gfs2_holder al_ri_gh;
 261         struct gfs2_holder al_rgd_gh;
 262         struct gfs2_rgrpd *al_rgd;
 263
 264 };
 265
 266 enum {
 267         GIF_INVALID             = 0,
 268         GIF_QD_LOCKED           = 1,
 269         GIF_SW_PAGED            = 3,
 270 };
 271
 272
 273 struct gfs2_inode {
 274         struct inode i_inode;
 275         u64 i_no_addr;
 276         u64 i_no_formal_ino;
 277         u64 i_generation;
 278         u64 i_eattr;
 279         unsigned long i_flags;          /* GIF_... */
 280         struct gfs2_glock *i_gl; /* Move into i_gh? */
 281         struct gfs2_holder i_iopen_gh;
 282         struct gfs2_holder i_gh; /* for prepare/commit_write only */
 283         struct gfs2_alloc *i_alloc;
 284         u64 i_goal;     /* goal block for allocations */
 285         struct rw_semaphore i_rw_mutex;
 286         struct list_head i_trunc_list;
 287         u32 i_entries;
 288         u32 i_diskflags;
 289         u8 i_height;
 290         u8 i_depth;
 291 };
 292
 293 /*
 294  * Since i_inode is the first element of struct gfs2_inode,
 295  * this is effectively a cast.
 296  */
 297 static inline struct gfs2_inode *GFS2_I(struct inode *inode)
 298 {
 299         return container_of(inode, struct gfs2_inode, i_inode);
 300 }
 301
 302 static inline struct gfs2_sbd *GFS2_SB(const struct inode *inode)
 303 {
 304         return inode->i_sb->s_fs_info;
 305 }
 306
 307 struct gfs2_file {
 308         struct mutex f_fl_mutex;
 309         struct gfs2_holder f_fl_gh;
 310 };
 311
 312 struct gfs2_revoke_replay {
 313         struct list_head rr_list;
 314         u64 rr_blkno;
 315         unsigned int rr_where;
 316 };
 317
 318 enum {
 319         QDF_USER                = 0,
 320         QDF_CHANGE              = 1,
 321         QDF_LOCKED              = 2,
 322         QDF_REFRESH             = 3,
 323 };
 324
 325 struct gfs2_quota_data {
 326         struct list_head qd_list;
 327         struct list_head qd_reclaim;
 328
 329         atomic_t qd_count;
 330
 331         u32 qd_id;
 332         unsigned long qd_flags;         /* QDF_... */
 333
 334         s64 qd_change;
 335         s64 qd_change_sync;
 336
 337         unsigned int qd_slot;
 338         unsigned int qd_slot_count;
 339
 340         struct buffer_head *qd_bh;
 341         struct gfs2_quota_change *qd_bh_qc;
 342         unsigned int qd_bh_count;
 343
 344         struct gfs2_glock *qd_gl;
 345         struct gfs2_quota_lvb qd_qb;
 346
 347         u64 qd_sync_gen;
 348         unsigned long qd_last_warn;
 349 };
 350
 351 struct gfs2_trans {
 352         unsigned long tr_ip;
 353
 354         unsigned int tr_blocks;
 355         unsigned int tr_revokes;
 356         unsigned int tr_reserved;
 357
 358         struct gfs2_holder tr_t_gh;
 359
 360         int tr_touched;
 361
 362         unsigned int tr_num_buf;
 363         unsigned int tr_num_buf_new;
 364         unsigned int tr_num_databuf_new;
 365         unsigned int tr_num_buf_rm;
 366         unsigned int tr_num_databuf_rm;
 367         struct list_head tr_list_buf;
 368
 369         unsigned int tr_num_revoke;
 370         unsigned int tr_num_revoke_rm;
 371 };
 372
 373 struct gfs2_ail {
 374         struct list_head ai_list;
 375
 376         unsigned int ai_first;
 377         struct list_head ai_ail1_list;
 378         struct list_head ai_ail2_list;
 379 };
 380
 381 struct gfs2_journal_extent {
 382         struct list_head extent_list;
 383
 384         unsigned int lblock; /* First logical block */
 385         u64 dblock; /* First disk block */
 386         u64 blocks;
 387 };
 388
 389 struct gfs2_jdesc {
 390         struct list_head jd_list;
 391         struct list_head extent_list;
 392         struct work_struct jd_work;
 393         struct inode *jd_inode;
 394         unsigned long jd_flags;
 395 #define JDF_RECOVERY 1
 396         unsigned int jd_jid;
 397         unsigned int jd_blocks;
 398 };
 399
 400 struct gfs2_statfs_change_host {
 401         s64 sc_total;
 402         s64 sc_free;
 403         s64 sc_dinodes;
 404 };
 405
 406 #define GFS2_QUOTA_DEFAULT      GFS2_QUOTA_OFF
 407 #define GFS2_QUOTA_OFF          0
 408 #define GFS2_QUOTA_ACCOUNT      1
 409 #define GFS2_QUOTA_ON           2
 410
 411 #define GFS2_DATA_DEFAULT       GFS2_DATA_ORDERED
 412 #define GFS2_DATA_WRITEBACK     1
 413 #define GFS2_DATA_ORDERED       2
 414
 415 #define GFS2_ERRORS_DEFAULT     GFS2_ERRORS_WITHDRAW
 416 #define GFS2_ERRORS_WITHDRAW    0
 417 #define GFS2_ERRORS_CONTINUE    1 /* place holder for future feature */
 418 #define GFS2_ERRORS_RO          2 /* place holder for future feature */
 419 #define GFS2_ERRORS_PANIC       3
 420
 421 struct gfs2_args {
 422         char ar_lockproto[GFS2_LOCKNAME_LEN];   /* Name of the Lock Protocol */
 423         char ar_locktable[GFS2_LOCKNAME_LEN];   /* Name of the Lock Table */
 424         char ar_hostdata[GFS2_LOCKNAME_LEN];    /* Host specific data */
 425         unsigned int ar_spectator:1;            /* Don't get a journal */
 426         unsigned int ar_localflocks:1;          /* Let the VFS do flock|fcntl */
 427         unsigned int ar_debug:1;                /* Oops on errors */
 428         unsigned int ar_posix_acl:1;            /* Enable posix acls */
 429         unsigned int ar_quota:2;                /* off/account/on */
 430         unsigned int ar_suiddir:1;              /* suiddir support */
 431         unsigned int ar_data:2;                 /* ordered/writeback */
 432         unsigned int ar_meta:1;                 /* mount metafs */
 433         unsigned int ar_discard:1;              /* discard requests */
 434         unsigned int ar_errors:2;               /* errors=withdraw | panic */
 435         unsigned int ar_nobarrier:1;            /* do not send barriers */
 436         int ar_commit;                          /* Commit interval */
 437         int ar_statfs_quantum;                  /* The fast statfs interval */
 438         int ar_quota_quantum;                   /* The quota interval */
 439         int ar_statfs_percent;                  /* The % change to force sync */
 440 };
 441
 442 struct gfs2_tune {
 443         spinlock_t gt_spin;
 444
 445         unsigned int gt_logd_secs;
 446
 447         unsigned int gt_quota_simul_sync; /* Max quotavals to sync at once */
 448         unsigned int gt_quota_warn_period; /* Secs between quota warn msgs */
 449         unsigned int gt_quota_scale_num; /* Numerator */
 450         unsigned int gt_quota_scale_den; /* Denominator */
 451         unsigned int gt_quota_quantum; /* Secs between syncs to quota file */
 452         unsigned int gt_new_files_jdata;
 453         unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */
 454         unsigned int gt_complain_secs;
 455         unsigned int gt_statfs_quantum;
 456         unsigned int gt_statfs_slow;
 457 };
 458
 459 enum {
 460         SDF_JOURNAL_CHECKED     = 0,
 461         SDF_JOURNAL_LIVE        = 1,
 462         SDF_SHUTDOWN            = 2,
 463         SDF_NOBARRIERS          = 3,
 464         SDF_NORECOVERY          = 4,
 465         SDF_DEMOTE              = 5,
 466         SDF_NOJOURNALID         = 6,
 467 };
 468
 469 #define GFS2_FSNAME_LEN         256
 470
 471 struct gfs2_inum_host {
 472         u64 no_formal_ino;
 473         u64 no_addr;
 474 };
 475
 476 struct gfs2_sb_host {
 477         u32 sb_magic;
 478         u32 sb_type;
 479         u32 sb_format;
 480
 481         u32 sb_fs_format;
 482         u32 sb_multihost_format;
 483         u32 sb_bsize;
 484         u32 sb_bsize_shift;
 485
 486         struct gfs2_inum_host sb_master_dir;
 487         struct gfs2_inum_host sb_root_dir;
 488
 489         char sb_lockproto[GFS2_LOCKNAME_LEN];
 490         char sb_locktable[GFS2_LOCKNAME_LEN];
 491 };
 492
 493 /*
 494  * lm_mount() return values
 495  *
 496  * ls_jid - the journal ID this node should use
 497  * ls_first - this node is the first to mount the file system
 498  * ls_lockspace - lock module's context for this file system
 499  * ls_ops - lock module's functions
 500  */
 501
 502 struct lm_lockstruct {
 503         int ls_jid;
 504         unsigned int ls_first;
 505         unsigned int ls_first_done;
 506         unsigned int ls_nodir;
 507         const struct lm_lockops *ls_ops;
 508         unsigned long ls_flags;
 509         dlm_lockspace_t *ls_dlm;
 510
 511         int ls_recover_jid_done;
 512         int ls_recover_jid_status;
 513 };
 514
 515 struct gfs2_sbd {
 516         struct super_block *sd_vfs;
 517         struct kobject sd_kobj;
 518         unsigned long sd_flags; /* SDF_... */
 519         struct gfs2_sb_host sd_sb;
 520
 521         /* Constants computed on mount */
 522
 523         u32 sd_fsb2bb;
 524         u32 sd_fsb2bb_shift;
 525         u32 sd_diptrs;  /* Number of pointers in a dinode */
 526         u32 sd_inptrs;  /* Number of pointers in a indirect block */
 527         u32 sd_jbsize;  /* Size of a journaled data block */
 528         u32 sd_hash_bsize;      /* sizeof(exhash block) */
 529         u32 sd_hash_bsize_shift;
 530         u32 sd_hash_ptrs;       /* Number of pointers in a hash block */
 531         u32 sd_qc_per_block;
 532         u32 sd_max_dirres;      /* Max blocks needed to add a directory entry */
 533         u32 sd_max_height;      /* Max height of a file's metadata tree */
 534         u64 sd_heightsize[GFS2_MAX_META_HEIGHT + 1];
 535         u32 sd_max_jheight; /* Max height of journaled file's meta tree */
 536         u64 sd_jheightsize[GFS2_MAX_META_HEIGHT + 1];
 537
 538         struct gfs2_args sd_args;       /* Mount arguments */
 539         struct gfs2_tune sd_tune;       /* Filesystem tuning structure */
 540
 541         /* Lock Stuff */
 542
 543         struct lm_lockstruct sd_lockstruct;
 544         struct gfs2_holder sd_live_gh;
 545         struct gfs2_glock *sd_rename_gl;
 546         struct gfs2_glock *sd_trans_gl;
 547         wait_queue_head_t sd_glock_wait;
 548         atomic_t sd_glock_disposal;
 549
 550         /* Inode Stuff */
 551
 552         struct dentry *sd_master_dir;
 553         struct dentry *sd_root_dir;
 554
 555         struct inode *sd_jindex;
 556         struct inode *sd_statfs_inode;
 557         struct inode *sd_sc_inode;
 558         struct inode *sd_qc_inode;
 559         struct inode *sd_rindex;
 560         struct inode *sd_quota_inode;
 561
 562         /* StatFS stuff */
 563
 564         spinlock_t sd_statfs_spin;
 565         struct gfs2_statfs_change_host sd_statfs_master;
 566         struct gfs2_statfs_change_host sd_statfs_local;
 567         int sd_statfs_force_sync;
 568
 569         /* Resource group stuff */
 570
 571         int sd_rindex_uptodate;
 572         spinlock_t sd_rindex_spin;
 573         struct mutex sd_rindex_mutex;
 574         struct list_head sd_rindex_list;
 575         struct list_head sd_rindex_mru_list;
 576         struct gfs2_rgrpd *sd_rindex_forward;
 577         unsigned int sd_rgrps;
 578         unsigned int sd_max_rg_data;
 579
 580         /* Journal index stuff */
 581
 582         struct list_head sd_jindex_list;
 583         spinlock_t sd_jindex_spin;
 584         struct mutex sd_jindex_mutex;
 585         unsigned int sd_journals;
 586
 587         struct gfs2_jdesc *sd_jdesc;
 588         struct gfs2_holder sd_journal_gh;
 589         struct gfs2_holder sd_jinode_gh;
 590
 591         struct gfs2_holder sd_sc_gh;
 592         struct gfs2_holder sd_qc_gh;
 593
 594         /* Daemon stuff */
 595
 596         struct task_struct *sd_logd_process;
 597         struct task_struct *sd_quotad_process;
 598
 599         /* Quota stuff */
 600
 601         struct list_head sd_quota_list;
 602         atomic_t sd_quota_count;
 603         struct mutex sd_quota_mutex;
 604         wait_queue_head_t sd_quota_wait;
 605         struct list_head sd_trunc_list;
 606         spinlock_t sd_trunc_lock;
 607
 608         unsigned int sd_quota_slots;
 609         unsigned int sd_quota_chunks;
 610         unsigned char **sd_quota_bitmap;
 611
 612         u64 sd_quota_sync_gen;
 613
 614         /* Log stuff */
 615
 616         spinlock_t sd_log_lock;
 617
 618         unsigned int sd_log_blks_reserved;
 619         unsigned int sd_log_commited_buf;
 620         unsigned int sd_log_commited_databuf;
 621         int sd_log_commited_revoke;
 622
 623         atomic_t sd_log_pinned;
 624         unsigned int sd_log_num_buf;
 625         unsigned int sd_log_num_revoke;
 626         unsigned int sd_log_num_rg;
 627         unsigned int sd_log_num_databuf;
 628
 629         struct list_head sd_log_le_buf;
 630         struct list_head sd_log_le_revoke;
 631         struct list_head sd_log_le_rg;
 632         struct list_head sd_log_le_databuf;
 633         struct list_head sd_log_le_ordered;
 634
 635         atomic_t sd_log_thresh1;
 636         atomic_t sd_log_thresh2;
 637         atomic_t sd_log_blks_free;
 638         wait_queue_head_t sd_log_waitq;
 639         wait_queue_head_t sd_logd_waitq;
 640
 641         u64 sd_log_sequence;
 642         unsigned int sd_log_head;
 643         unsigned int sd_log_tail;
 644         int sd_log_idle;
 645
 646         struct rw_semaphore sd_log_flush_lock;
 647         atomic_t sd_log_in_flight;
 648         wait_queue_head_t sd_log_flush_wait;
 649
 650         unsigned int sd_log_flush_head;
 651         u64 sd_log_flush_wrapped;
 652
 653         spinlock_t sd_ail_lock;
 654         struct list_head sd_ail1_list;
 655         struct list_head sd_ail2_list;
 656
 657         /* Replay stuff */
 658
 659         struct list_head sd_revoke_list;
 660         unsigned int sd_replay_tail;
 661
 662         unsigned int sd_found_blocks;
 663         unsigned int sd_found_revokes;
 664         unsigned int sd_replayed_blocks;
 665
 666         /* For quiescing the filesystem */
 667
 668         struct gfs2_holder sd_freeze_gh;
 669         struct mutex sd_freeze_lock;
 670         unsigned int sd_freeze_count;
 671
 672         char sd_fsname[GFS2_FSNAME_LEN];
 673         char sd_table_name[GFS2_FSNAME_LEN];
 674         char sd_proto_name[GFS2_FSNAME_LEN];
 675
 676         /* Debugging crud */
 677
 678         unsigned long sd_last_warning;
 679         struct dentry *debugfs_dir;    /* debugfs directory */
 680         struct dentry *debugfs_dentry_glocks; /* for debugfs */
 681 };
 682
 683 #endif /* __INCORE_DOT_H__ */
 684