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/workqueue.h>
  15 #include <linux/dlm.h>
  16 #include <linux/buffer_head.h>
  17
  18 #define DIO_WAIT        0x00000010
  19 #define DIO_METADATA    0x00000020
  20 #define DIO_ALL         0x00000100
  21
  22 struct gfs2_log_operations;
  23 struct gfs2_log_element;
  24 struct gfs2_holder;
  25 struct gfs2_glock;
  26 struct gfs2_quota_data;
  27 struct gfs2_trans;
  28 struct gfs2_ail;
  29 struct gfs2_jdesc;
  30 struct gfs2_sbd;
  31 struct lm_lockops;
  32
  33 typedef void (*gfs2_glop_bh_t) (struct gfs2_glock *gl, unsigned int ret);
  34
  35 struct gfs2_log_header_host {
  36         u64 lh_sequence;        /* Sequence number of this transaction */
  37         u32 lh_flags;           /* GFS2_LOG_HEAD_... */
  38         u32 lh_tail;            /* Block number of log tail */
  39         u32 lh_blkno;
  40         u32 lh_hash;
  41 };
  42
  43 /*
  44  * Structure of operations that are associated with each
  45  * type of element in the log.
  46  */
  47
  48 struct gfs2_log_operations {
  49         void (*lo_add) (struct gfs2_sbd *sdp, struct gfs2_log_element *le);
  50         void (*lo_before_commit) (struct gfs2_sbd *sdp);
  51         void (*lo_after_commit) (struct gfs2_sbd *sdp, struct gfs2_ail *ai);
  52         void (*lo_before_scan) (struct gfs2_jdesc *jd,
  53                                 struct gfs2_log_header_host *head, int pass);
  54         int (*lo_scan_elements) (struct gfs2_jdesc *jd, unsigned int start,
  55                                  struct gfs2_log_descriptor *ld, __be64 *ptr,
  56                                  int pass);
  57         void (*lo_after_scan) (struct gfs2_jdesc *jd, int error, int pass);
  58         const char *lo_name;
  59 };
  60
  61 struct gfs2_log_element {
  62         struct list_head le_list;
  63         const struct gfs2_log_operations *le_ops;
  64 };
  65
  66 struct gfs2_bitmap {
  67         struct buffer_head *bi_bh;
  68         char *bi_clone;
  69         u32 bi_offset;
  70         u32 bi_start;
  71         u32 bi_len;
  72 };
  73
  74 struct gfs2_rgrpd {
  75         struct list_head rd_list;       /* Link with superblock */
  76         struct list_head rd_list_mru;
  77         struct gfs2_glock *rd_gl;       /* Glock for this rgrp */
  78         u64 rd_addr;                    /* grp block disk address */
  79         u64 rd_data0;                   /* first data location */
  80         u32 rd_length;                  /* length of rgrp header in fs blocks */
  81         u32 rd_data;                    /* num of data blocks in rgrp */
  82         u32 rd_bitbytes;                /* number of bytes in data bitmaps */
  83         u32 rd_free;
  84         u32 rd_free_clone;
  85         u32 rd_dinodes;
  86         u64 rd_igeneration;
  87         struct gfs2_bitmap *rd_bits;
  88         struct mutex rd_mutex;
  89         struct gfs2_log_element rd_le;
  90         struct gfs2_sbd *rd_sbd;
  91         unsigned int rd_bh_count;
  92         u32 rd_last_alloc;
  93         unsigned char rd_flags;
  94 #define GFS2_RDF_CHECK        0x01      /* Need to check for unlinked inodes */
  95 #define GFS2_RDF_NOALLOC      0x02      /* rg prohibits allocation */
  96 #define GFS2_RDF_UPTODATE     0x04      /* rg is up to date */
  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         union {
 114                 struct list_head list_tr;
 115                 u64 blkno;
 116         } u;
 117 #define bd_list_tr u.list_tr
 118 #define bd_blkno u.blkno
 119
 120         struct gfs2_log_element bd_le;
 121
 122         struct gfs2_ail *bd_ail;
 123         struct list_head bd_ail_st_list;
 124         struct list_head bd_ail_gl_list;
 125 };
 126
 127 /*
 128  * Internally, we prefix things with gdlm_ and GDLM_ (for gfs-dlm) since a
 129  * prefix of lock_dlm_ gets awkward.
 130  */
 131
 132 #define GDLM_STRNAME_BYTES      25
 133 #define GDLM_LVB_SIZE           32
 134
 135 enum {
 136         DFL_BLOCK_LOCKS         = 0,
 137 };
 138
 139 struct lm_lockname {
 140         u64 ln_number;
 141         unsigned int ln_type;
 142 };
 143
 144 #define lm_name_equal(name1, name2) \
 145         (((name1)->ln_number == (name2)->ln_number) && \
 146          ((name1)->ln_type == (name2)->ln_type))
 147
 148
 149 struct gfs2_glock_operations {
 150         void (*go_xmote_th) (struct gfs2_glock *gl);
 151         int (*go_xmote_bh) (struct gfs2_glock *gl, struct gfs2_holder *gh);
 152         void (*go_inval) (struct gfs2_glock *gl, int flags);
 153         int (*go_demote_ok) (const struct gfs2_glock *gl);
 154         int (*go_lock) (struct gfs2_holder *gh);
 155         void (*go_unlock) (struct gfs2_holder *gh);
 156         int (*go_dump)(struct seq_file *seq, const struct gfs2_glock *gl);
 157         const int go_type;
 158         const unsigned long go_min_hold_time;
 159 };
 160
 161 enum {
 162         /* States */
 163         HIF_HOLDER              = 6,  /* Set for gh that "holds" the glock */
 164         HIF_FIRST               = 7,
 165         HIF_WAIT                = 10,
 166 };
 167
 168 struct gfs2_holder {
 169         struct list_head gh_list;
 170
 171         struct gfs2_glock *gh_gl;
 172         struct pid *gh_owner_pid;
 173         unsigned int gh_state;
 174         unsigned gh_flags;
 175
 176         int gh_error;
 177         unsigned long gh_iflags; /* HIF_... */
 178         unsigned long gh_ip;
 179 };
 180
 181 enum {
 182         GLF_LOCK                        = 1,
 183         GLF_DEMOTE                      = 3,
 184         GLF_PENDING_DEMOTE              = 4,
 185         GLF_DEMOTE_IN_PROGRESS          = 5,
 186         GLF_DIRTY                       = 6,
 187         GLF_LFLUSH                      = 7,
 188         GLF_INVALIDATE_IN_PROGRESS      = 8,
 189         GLF_REPLY_PENDING               = 9,
 190         GLF_INITIAL                     = 10,
 191         GLF_FROZEN                      = 11,
 192 };
 193
 194 struct gfs2_glock {
 195         struct hlist_node gl_list;
 196         unsigned long gl_flags;         /* GLF_... */
 197         struct lm_lockname gl_name;
 198         atomic_t gl_ref;
 199
 200         spinlock_t gl_spin;
 201
 202         unsigned int gl_state;
 203         unsigned int gl_target;
 204         unsigned int gl_reply;
 205         unsigned int gl_hash;
 206         unsigned int gl_req;
 207         unsigned int gl_demote_state; /* state requested by remote node */
 208         unsigned long gl_demote_time; /* time of first demote request */
 209         struct list_head gl_holders;
 210
 211         const struct gfs2_glock_operations *gl_ops;
 212         char gl_strname[GDLM_STRNAME_BYTES];
 213         struct dlm_lksb gl_lksb;
 214         char gl_lvb[32];
 215         unsigned long gl_tchange;
 216         void *gl_object;
 217
 218         struct list_head gl_lru;
 219
 220         struct gfs2_sbd *gl_sbd;
 221
 222         struct inode *gl_aspace;
 223         struct list_head gl_ail_list;
 224         atomic_t gl_ail_count;
 225         struct delayed_work gl_work;
 226 };
 227
 228 #define GFS2_MIN_LVB_SIZE 32    /* Min size of LVB that gfs2 supports */
 229
 230 struct gfs2_alloc {
 231         /* Quota stuff */
 232
 233         struct gfs2_quota_data *al_qd[2*MAXQUOTAS];
 234         struct gfs2_holder al_qd_ghs[2*MAXQUOTAS];
 235         unsigned int al_qd_num;
 236
 237         u32 al_requested; /* Filled in by caller of gfs2_inplace_reserve() */
 238         u32 al_alloced; /* Filled in by gfs2_alloc_*() */
 239
 240         /* Filled in by gfs2_inplace_reserve() */
 241
 242         unsigned int al_line;
 243         char *al_file;
 244         struct gfs2_holder al_ri_gh;
 245         struct gfs2_holder al_rgd_gh;
 246         struct gfs2_rgrpd *al_rgd;
 247
 248 };
 249
 250 enum {
 251         GIF_INVALID             = 0,
 252         GIF_QD_LOCKED           = 1,
 253         GIF_SW_PAGED            = 3,
 254         GIF_USER                = 4, /* user inode, not metadata addr space */
 255 };
 256
 257
 258 struct gfs2_inode {
 259         struct inode i_inode;
 260         u64 i_no_addr;
 261         u64 i_no_formal_ino;
 262         u64 i_generation;
 263         u64 i_eattr;
 264         loff_t i_disksize;
 265         unsigned long i_flags;          /* GIF_... */
 266         struct gfs2_glock *i_gl; /* Move into i_gh? */
 267         struct gfs2_holder i_iopen_gh;
 268         struct gfs2_holder i_gh; /* for prepare/commit_write only */
 269         struct gfs2_alloc *i_alloc;
 270         u64 i_goal;     /* goal block for allocations */
 271         struct rw_semaphore i_rw_mutex;
 272         struct list_head i_trunc_list;
 273         u32 i_entries;
 274         u32 i_diskflags;
 275         u8 i_height;
 276         u8 i_depth;
 277 };
 278
 279 /*
 280  * Since i_inode is the first element of struct gfs2_inode,
 281  * this is effectively a cast.
 282  */
 283 static inline struct gfs2_inode *GFS2_I(struct inode *inode)
 284 {
 285         return container_of(inode, struct gfs2_inode, i_inode);
 286 }
 287
 288 static inline struct gfs2_sbd *GFS2_SB(const struct inode *inode)
 289 {
 290         return inode->i_sb->s_fs_info;
 291 }
 292
 293 struct gfs2_file {
 294         struct mutex f_fl_mutex;
 295         struct gfs2_holder f_fl_gh;
 296 };
 297
 298 struct gfs2_revoke_replay {
 299         struct list_head rr_list;
 300         u64 rr_blkno;
 301         unsigned int rr_where;
 302 };
 303
 304 enum {
 305         QDF_USER                = 0,
 306         QDF_CHANGE              = 1,
 307         QDF_LOCKED              = 2,
 308 };
 309
 310 struct gfs2_quota_data {
 311         struct list_head qd_list;
 312         struct list_head qd_reclaim;
 313
 314         atomic_t qd_count;
 315
 316         u32 qd_id;
 317         unsigned long qd_flags;         /* QDF_... */
 318
 319         s64 qd_change;
 320         s64 qd_change_sync;
 321
 322         unsigned int qd_slot;
 323         unsigned int qd_slot_count;
 324
 325         struct buffer_head *qd_bh;
 326         struct gfs2_quota_change *qd_bh_qc;
 327         unsigned int qd_bh_count;
 328
 329         struct gfs2_glock *qd_gl;
 330         struct gfs2_quota_lvb qd_qb;
 331
 332         u64 qd_sync_gen;
 333         unsigned long qd_last_warn;
 334 };
 335
 336 struct gfs2_trans {
 337         unsigned long tr_ip;
 338
 339         unsigned int tr_blocks;
 340         unsigned int tr_revokes;
 341         unsigned int tr_reserved;
 342
 343         struct gfs2_holder tr_t_gh;
 344
 345         int tr_touched;
 346
 347         unsigned int tr_num_buf;
 348         unsigned int tr_num_buf_new;
 349         unsigned int tr_num_databuf_new;
 350         unsigned int tr_num_buf_rm;
 351         unsigned int tr_num_databuf_rm;
 352         struct list_head tr_list_buf;
 353
 354         unsigned int tr_num_revoke;
 355         unsigned int tr_num_revoke_rm;
 356 };
 357
 358 struct gfs2_ail {
 359         struct list_head ai_list;
 360
 361         unsigned int ai_first;
 362         struct list_head ai_ail1_list;
 363         struct list_head ai_ail2_list;
 364
 365         u64 ai_sync_gen;
 366 };
 367
 368 struct gfs2_journal_extent {
 369         struct list_head extent_list;
 370
 371         unsigned int lblock; /* First logical block */
 372         u64 dblock; /* First disk block */
 373         u64 blocks;
 374 };
 375
 376 struct gfs2_jdesc {
 377         struct list_head jd_list;
 378         struct list_head extent_list;
 379
 380         struct inode *jd_inode;
 381         unsigned int jd_jid;
 382         int jd_dirty;
 383
 384         unsigned int jd_blocks;
 385 };
 386
 387 struct gfs2_statfs_change_host {
 388         s64 sc_total;
 389         s64 sc_free;
 390         s64 sc_dinodes;
 391 };
 392
 393 #define GFS2_GLOCKD_DEFAULT     1
 394 #define GFS2_GLOCKD_MAX         16
 395
 396 #define GFS2_QUOTA_DEFAULT      GFS2_QUOTA_OFF
 397 #define GFS2_QUOTA_OFF          0
 398 #define GFS2_QUOTA_ACCOUNT      1
 399 #define GFS2_QUOTA_ON           2
 400
 401 #define GFS2_DATA_DEFAULT       GFS2_DATA_ORDERED
 402 #define GFS2_DATA_WRITEBACK     1
 403 #define GFS2_DATA_ORDERED       2
 404
 405 struct gfs2_args {
 406         char ar_lockproto[GFS2_LOCKNAME_LEN];   /* Name of the Lock Protocol */
 407         char ar_locktable[GFS2_LOCKNAME_LEN];   /* Name of the Lock Table */
 408         char ar_hostdata[GFS2_LOCKNAME_LEN];    /* Host specific data */
 409         unsigned int ar_spectator:1;            /* Don't get a journal */
 410         unsigned int ar_ignore_local_fs:1;      /* Ignore optimisations */
 411         unsigned int ar_localflocks:1;          /* Let the VFS do flock|fcntl */
 412         unsigned int ar_localcaching:1;         /* Local caching */
 413         unsigned int ar_debug:1;                /* Oops on errors */
 414         unsigned int ar_upgrade:1;              /* Upgrade ondisk format */
 415         unsigned int ar_posix_acl:1;            /* Enable posix acls */
 416         unsigned int ar_quota:2;                /* off/account/on */
 417         unsigned int ar_suiddir:1;              /* suiddir support */
 418         unsigned int ar_data:2;                 /* ordered/writeback */
 419         unsigned int ar_meta:1;                 /* mount metafs */
 420         unsigned int ar_discard:1;              /* discard requests */
 421 };
 422
 423 struct gfs2_tune {
 424         spinlock_t gt_spin;
 425
 426         unsigned int gt_incore_log_blocks;
 427         unsigned int gt_log_flush_secs;
 428
 429         unsigned int gt_recoverd_secs;
 430         unsigned int gt_logd_secs;
 431
 432         unsigned int gt_quota_simul_sync; /* Max quotavals to sync at once */
 433         unsigned int gt_quota_warn_period; /* Secs between quota warn msgs */
 434         unsigned int gt_quota_scale_num; /* Numerator */
 435         unsigned int gt_quota_scale_den; /* Denominator */
 436         unsigned int gt_quota_quantum; /* Secs between syncs to quota file */
 437         unsigned int gt_new_files_jdata;
 438         unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */
 439         unsigned int gt_stall_secs; /* Detects trouble! */
 440         unsigned int gt_complain_secs;
 441         unsigned int gt_statfs_quantum;
 442         unsigned int gt_statfs_slow;
 443 };
 444
 445 enum {
 446         SDF_JOURNAL_CHECKED     = 0,
 447         SDF_JOURNAL_LIVE        = 1,
 448         SDF_SHUTDOWN            = 2,
 449         SDF_NOBARRIERS          = 3,
 450 };
 451
 452 #define GFS2_FSNAME_LEN         256
 453
 454 struct gfs2_inum_host {
 455         u64 no_formal_ino;
 456         u64 no_addr;
 457 };
 458
 459 struct gfs2_sb_host {
 460         u32 sb_magic;
 461         u32 sb_type;
 462         u32 sb_format;
 463
 464         u32 sb_fs_format;
 465         u32 sb_multihost_format;
 466         u32 sb_bsize;
 467         u32 sb_bsize_shift;
 468
 469         struct gfs2_inum_host sb_master_dir;
 470         struct gfs2_inum_host sb_root_dir;
 471
 472         char sb_lockproto[GFS2_LOCKNAME_LEN];
 473         char sb_locktable[GFS2_LOCKNAME_LEN];
 474         u8 sb_uuid[16];
 475 };
 476
 477 /*
 478  * lm_mount() return values
 479  *
 480  * ls_jid - the journal ID this node should use
 481  * ls_first - this node is the first to mount the file system
 482  * ls_lockspace - lock module's context for this file system
 483  * ls_ops - lock module's functions
 484  */
 485
 486 struct lm_lockstruct {
 487         u32 ls_id;
 488         unsigned int ls_jid;
 489         unsigned int ls_first;
 490         unsigned int ls_first_done;
 491         unsigned int ls_nodir;
 492         const struct lm_lockops *ls_ops;
 493         unsigned long ls_flags;
 494         dlm_lockspace_t *ls_dlm;
 495
 496         int ls_recover_jid;
 497         int ls_recover_jid_done;
 498         int ls_recover_jid_status;
 499 };
 500
 501 struct gfs2_sbd {
 502         struct super_block *sd_vfs;
 503         struct kobject sd_kobj;
 504         unsigned long sd_flags; /* SDF_... */
 505         struct gfs2_sb_host sd_sb;
 506
 507         /* Constants computed on mount */
 508
 509         u32 sd_fsb2bb;
 510         u32 sd_fsb2bb_shift;
 511         u32 sd_diptrs;  /* Number of pointers in a dinode */
 512         u32 sd_inptrs;  /* Number of pointers in a indirect block */
 513         u32 sd_jbsize;  /* Size of a journaled data block */
 514         u32 sd_hash_bsize;      /* sizeof(exhash block) */
 515         u32 sd_hash_bsize_shift;
 516         u32 sd_hash_ptrs;       /* Number of pointers in a hash block */
 517         u32 sd_qc_per_block;
 518         u32 sd_max_dirres;      /* Max blocks needed to add a directory entry */
 519         u32 sd_max_height;      /* Max height of a file's metadata tree */
 520         u64 sd_heightsize[GFS2_MAX_META_HEIGHT + 1];
 521         u32 sd_max_jheight; /* Max height of journaled file's meta tree */
 522         u64 sd_jheightsize[GFS2_MAX_META_HEIGHT + 1];
 523
 524         struct gfs2_args sd_args;       /* Mount arguments */
 525         struct gfs2_tune sd_tune;       /* Filesystem tuning structure */
 526
 527         /* Lock Stuff */
 528
 529         struct lm_lockstruct sd_lockstruct;
 530         struct gfs2_holder sd_live_gh;
 531         struct gfs2_glock *sd_rename_gl;
 532         struct gfs2_glock *sd_trans_gl;
 533
 534         /* Inode Stuff */
 535
 536         struct dentry *sd_master_dir;
 537         struct dentry *sd_root_dir;
 538
 539         struct inode *sd_jindex;
 540         struct inode *sd_inum_inode;
 541         struct inode *sd_statfs_inode;
 542         struct inode *sd_ir_inode;
 543         struct inode *sd_sc_inode;
 544         struct inode *sd_qc_inode;
 545         struct inode *sd_rindex;
 546         struct inode *sd_quota_inode;
 547
 548         /* Inum stuff */
 549
 550         struct mutex sd_inum_mutex;
 551
 552         /* StatFS stuff */
 553
 554         spinlock_t sd_statfs_spin;
 555         struct gfs2_statfs_change_host sd_statfs_master;
 556         struct gfs2_statfs_change_host sd_statfs_local;
 557
 558         /* Resource group stuff */
 559
 560         int sd_rindex_uptodate;
 561         spinlock_t sd_rindex_spin;
 562         struct mutex sd_rindex_mutex;
 563         struct list_head sd_rindex_list;
 564         struct list_head sd_rindex_mru_list;
 565         struct gfs2_rgrpd *sd_rindex_forward;
 566         unsigned int sd_rgrps;
 567
 568         /* Journal index stuff */
 569
 570         struct list_head sd_jindex_list;
 571         spinlock_t sd_jindex_spin;
 572         struct mutex sd_jindex_mutex;
 573         unsigned int sd_journals;
 574
 575         struct gfs2_jdesc *sd_jdesc;
 576         struct gfs2_holder sd_journal_gh;
 577         struct gfs2_holder sd_jinode_gh;
 578
 579         struct gfs2_holder sd_ir_gh;
 580         struct gfs2_holder sd_sc_gh;
 581         struct gfs2_holder sd_qc_gh;
 582
 583         /* Daemon stuff */
 584
 585         struct task_struct *sd_recoverd_process;
 586         struct task_struct *sd_logd_process;
 587         struct task_struct *sd_quotad_process;
 588
 589         /* Quota stuff */
 590
 591         struct list_head sd_quota_list;
 592         atomic_t sd_quota_count;
 593         struct mutex sd_quota_mutex;
 594         wait_queue_head_t sd_quota_wait;
 595         struct list_head sd_trunc_list;
 596         spinlock_t sd_trunc_lock;
 597
 598         unsigned int sd_quota_slots;
 599         unsigned int sd_quota_chunks;
 600         unsigned char **sd_quota_bitmap;
 601
 602         u64 sd_quota_sync_gen;
 603
 604         /* Log stuff */
 605
 606         spinlock_t sd_log_lock;
 607
 608         unsigned int sd_log_blks_reserved;
 609         unsigned int sd_log_commited_buf;
 610         unsigned int sd_log_commited_databuf;
 611         unsigned int sd_log_commited_revoke;
 612
 613         unsigned int sd_log_num_buf;
 614         unsigned int sd_log_num_revoke;
 615         unsigned int sd_log_num_rg;
 616         unsigned int sd_log_num_databuf;
 617
 618         struct list_head sd_log_le_buf;
 619         struct list_head sd_log_le_revoke;
 620         struct list_head sd_log_le_rg;
 621         struct list_head sd_log_le_databuf;
 622         struct list_head sd_log_le_ordered;
 623
 624         atomic_t sd_log_blks_free;
 625         struct mutex sd_log_reserve_mutex;
 626
 627         u64 sd_log_sequence;
 628         unsigned int sd_log_head;
 629         unsigned int sd_log_tail;
 630         int sd_log_idle;
 631
 632         unsigned long sd_log_flush_time;
 633         struct rw_semaphore sd_log_flush_lock;
 634         atomic_t sd_log_in_flight;
 635         wait_queue_head_t sd_log_flush_wait;
 636
 637         unsigned int sd_log_flush_head;
 638         u64 sd_log_flush_wrapped;
 639
 640         struct list_head sd_ail1_list;
 641         struct list_head sd_ail2_list;
 642         u64 sd_ail_sync_gen;
 643
 644         /* Replay stuff */
 645
 646         struct list_head sd_revoke_list;
 647         unsigned int sd_replay_tail;
 648
 649         unsigned int sd_found_blocks;
 650         unsigned int sd_found_revokes;
 651         unsigned int sd_replayed_blocks;
 652
 653         /* For quiescing the filesystem */
 654
 655         struct gfs2_holder sd_freeze_gh;
 656         struct mutex sd_freeze_lock;
 657         unsigned int sd_freeze_count;
 658
 659         char sd_fsname[GFS2_FSNAME_LEN];
 660         char sd_table_name[GFS2_FSNAME_LEN];
 661         char sd_proto_name[GFS2_FSNAME_LEN];
 662
 663         /* Debugging crud */
 664
 665         unsigned long sd_last_warning;
 666         struct dentry *debugfs_dir;    /* debugfs directory */
 667         struct dentry *debugfs_dentry_glocks; /* for debugfs */
 668 };
 669
 670 #endif /* __INCORE_DOT_H__ */
 671