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
  16 #define DIO_WAIT        0x00000010
  17 #define DIO_METADATA    0x00000020
  18 #define DIO_ALL         0x00000100
  19
  20 struct gfs2_log_operations;
  21 struct gfs2_log_element;
  22 struct gfs2_holder;
  23 struct gfs2_glock;
  24 struct gfs2_quota_data;
  25 struct gfs2_trans;
  26 struct gfs2_ail;
  27 struct gfs2_jdesc;
  28 struct gfs2_sbd;
  29
  30 typedef void (*gfs2_glop_bh_t) (struct gfs2_glock *gl, unsigned int ret);
  31
  32 struct gfs2_log_header_host {
  33         u64 lh_sequence;        /* Sequence number of this transaction */
  34         u32 lh_flags;           /* GFS2_LOG_HEAD_... */
  35         u32 lh_tail;            /* Block number of log tail */
  36         u32 lh_blkno;
  37         u32 lh_hash;
  38 };
  39
  40 /*
  41  * Structure of operations that are associated with each
  42  * type of element in the log.
  43  */
  44
  45 struct gfs2_log_operations {
  46         void (*lo_add) (struct gfs2_sbd *sdp, struct gfs2_log_element *le);
  47         void (*lo_before_commit) (struct gfs2_sbd *sdp);
  48         void (*lo_after_commit) (struct gfs2_sbd *sdp, struct gfs2_ail *ai);
  49         void (*lo_before_scan) (struct gfs2_jdesc *jd,
  50                                 struct gfs2_log_header_host *head, int pass);
  51         int (*lo_scan_elements) (struct gfs2_jdesc *jd, unsigned int start,
  52                                  struct gfs2_log_descriptor *ld, __be64 *ptr,
  53                                  int pass);
  54         void (*lo_after_scan) (struct gfs2_jdesc *jd, int error, int pass);
  55         const char *lo_name;
  56 };
  57
  58 struct gfs2_log_element {
  59         struct list_head le_list;
  60         const struct gfs2_log_operations *le_ops;
  61 };
  62
  63 struct gfs2_bitmap {
  64         struct buffer_head *bi_bh;
  65         char *bi_clone;
  66         u32 bi_offset;
  67         u32 bi_start;
  68         u32 bi_len;
  69 };
  70
  71 struct gfs2_rgrp_host {
  72         u32 rg_free;
  73         u32 rg_dinodes;
  74         u64 rg_igeneration;
  75 };
  76
  77 struct gfs2_rgrpd {
  78         struct list_head rd_list;       /* Link with superblock */
  79         struct list_head rd_list_mru;
  80         struct list_head rd_recent;     /* Recently used rgrps */
  81         struct gfs2_glock *rd_gl;       /* Glock for this rgrp */
  82         u64 rd_addr;                    /* grp block disk address */
  83         u64 rd_data0;                   /* first data location */
  84         u32 rd_length;                  /* length of rgrp header in fs blocks */
  85         u32 rd_data;                    /* num of data blocks in rgrp */
  86         u32 rd_bitbytes;                /* number of bytes in data bitmaps */
  87         struct gfs2_rgrp_host rd_rg;
  88         struct gfs2_bitmap *rd_bits;
  89         unsigned int rd_bh_count;
  90         struct mutex rd_mutex;
  91         u32 rd_free_clone;
  92         struct gfs2_log_element rd_le;
  93         u32 rd_last_alloc;
  94         struct gfs2_sbd *rd_sbd;
  95         unsigned char rd_flags;
  96 #define GFS2_RDF_CHECK        0x01      /* Need to check for unlinked inodes */
  97 #define GFS2_RDF_NOALLOC      0x02      /* rg prohibits allocation */
  98 #define GFS2_RDF_UPTODATE     0x04      /* rg is up to date */
  99 };
 100
 101 enum gfs2_state_bits {
 102         BH_Pinned = BH_PrivateStart,
 103         BH_Escaped = BH_PrivateStart + 1,
 104 };
 105
 106 BUFFER_FNS(Pinned, pinned)
 107 TAS_BUFFER_FNS(Pinned, pinned)
 108 BUFFER_FNS(Escaped, escaped)
 109 TAS_BUFFER_FNS(Escaped, escaped)
 110
 111 struct gfs2_bufdata {
 112         struct buffer_head *bd_bh;
 113         struct gfs2_glock *bd_gl;
 114
 115         union {
 116                 struct list_head list_tr;
 117                 u64 blkno;
 118         } u;
 119 #define bd_list_tr u.list_tr
 120 #define bd_blkno u.blkno
 121
 122         struct gfs2_log_element bd_le;
 123
 124         struct gfs2_ail *bd_ail;
 125         struct list_head bd_ail_st_list;
 126         struct list_head bd_ail_gl_list;
 127 };
 128
 129 struct gfs2_glock_operations {
 130         void (*go_xmote_th) (struct gfs2_glock *gl);
 131         void (*go_xmote_bh) (struct gfs2_glock *gl);
 132         void (*go_inval) (struct gfs2_glock *gl, int flags);
 133         int (*go_demote_ok) (struct gfs2_glock *gl);
 134         int (*go_lock) (struct gfs2_holder *gh);
 135         void (*go_unlock) (struct gfs2_holder *gh);
 136         const int go_type;
 137         const unsigned long go_min_hold_time;
 138 };
 139
 140 enum {
 141         /* States */
 142         HIF_HOLDER              = 6,
 143         HIF_FIRST               = 7,
 144         HIF_ABORTED             = 9,
 145         HIF_WAIT                = 10,
 146 };
 147
 148 struct gfs2_holder {
 149         struct list_head gh_list;
 150
 151         struct gfs2_glock *gh_gl;
 152         struct pid *gh_owner_pid;
 153         unsigned int gh_state;
 154         unsigned gh_flags;
 155
 156         int gh_error;
 157         unsigned long gh_iflags;
 158         unsigned long gh_ip;
 159 };
 160
 161 enum {
 162         GLF_LOCK                = 1,
 163         GLF_STICKY              = 2,
 164         GLF_DEMOTE              = 3,
 165         GLF_PENDING_DEMOTE      = 4,
 166         GLF_DIRTY               = 5,
 167         GLF_DEMOTE_IN_PROGRESS  = 6,
 168         GLF_LFLUSH              = 7,
 169         GLF_WAITERS2            = 8,
 170         GLF_CONV_DEADLK         = 9,
 171 };
 172
 173 struct gfs2_glock {
 174         struct hlist_node gl_list;
 175         unsigned long gl_flags;         /* GLF_... */
 176         struct lm_lockname gl_name;
 177         atomic_t gl_ref;
 178
 179         spinlock_t gl_spin;
 180
 181         unsigned int gl_state;
 182         unsigned int gl_hash;
 183         unsigned int gl_demote_state; /* state requested by remote node */
 184         unsigned long gl_demote_time; /* time of first demote request */
 185         struct pid *gl_owner_pid;
 186         unsigned long gl_ip;
 187         struct list_head gl_holders;
 188         struct list_head gl_waiters1;   /* HIF_MUTEX */
 189         struct list_head gl_waiters3;   /* HIF_PROMOTE */
 190
 191         const struct gfs2_glock_operations *gl_ops;
 192
 193         struct gfs2_holder *gl_req_gh;
 194
 195         void *gl_lock;
 196         char *gl_lvb;
 197         atomic_t gl_lvb_count;
 198
 199         unsigned long gl_stamp;
 200         unsigned long gl_tchange;
 201         void *gl_object;
 202
 203         struct list_head gl_reclaim;
 204
 205         struct gfs2_sbd *gl_sbd;
 206
 207         struct inode *gl_aspace;
 208         struct list_head gl_ail_list;
 209         atomic_t gl_ail_count;
 210         struct delayed_work gl_work;
 211 };
 212
 213 #define GFS2_MIN_LVB_SIZE 32    /* Min size of LVB that gfs2 supports */
 214
 215 struct gfs2_alloc {
 216         /* Quota stuff */
 217
 218         struct gfs2_quota_data *al_qd[2*MAXQUOTAS];
 219         struct gfs2_holder al_qd_ghs[2*MAXQUOTAS];
 220         unsigned int al_qd_num;
 221
 222         u32 al_requested; /* Filled in by caller of gfs2_inplace_reserve() */
 223         u32 al_alloced; /* Filled in by gfs2_alloc_*() */
 224
 225         /* Filled in by gfs2_inplace_reserve() */
 226
 227         unsigned int al_line;
 228         char *al_file;
 229         struct gfs2_holder al_ri_gh;
 230         struct gfs2_holder al_rgd_gh;
 231         struct gfs2_rgrpd *al_rgd;
 232
 233 };
 234
 235 enum {
 236         GIF_INVALID             = 0,
 237         GIF_QD_LOCKED           = 1,
 238         GIF_SW_PAGED            = 3,
 239         GIF_USER                = 4, /* user inode, not metadata addr space */
 240 };
 241
 242 struct gfs2_dinode_host {
 243         u64 di_size;            /* number of bytes in file */
 244         u64 di_generation;      /* generation number for NFS */
 245         u32 di_flags;           /* GFS2_DIF_... */
 246         /* These only apply to directories  */
 247         u32 di_entries;         /* The number of entries in the directory */
 248         u64 di_eattr;           /* extended attribute block number */
 249 };
 250
 251 struct gfs2_inode {
 252         struct inode i_inode;
 253         u64 i_no_addr;
 254         u64 i_no_formal_ino;
 255         unsigned long i_flags;          /* GIF_... */
 256
 257         struct gfs2_dinode_host i_di; /* To be replaced by ref to block */
 258
 259         struct gfs2_glock *i_gl; /* Move into i_gh? */
 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         u64 i_goal;     /* goal block for allocations */
 264         struct rw_semaphore i_rw_mutex;
 265         u8 i_height;
 266         u8 i_depth;
 267 };
 268
 269 /*
 270  * Since i_inode is the first element of struct gfs2_inode,
 271  * this is effectively a cast.
 272  */
 273 static inline struct gfs2_inode *GFS2_I(struct inode *inode)
 274 {
 275         return container_of(inode, struct gfs2_inode, i_inode);
 276 }
 277
 278 static inline struct gfs2_sbd *GFS2_SB(const struct inode *inode)
 279 {
 280         return inode->i_sb->s_fs_info;
 281 }
 282
 283 struct gfs2_file {
 284         struct mutex f_fl_mutex;
 285         struct gfs2_holder f_fl_gh;
 286 };
 287
 288 struct gfs2_revoke_replay {
 289         struct list_head rr_list;
 290         u64 rr_blkno;
 291         unsigned int rr_where;
 292 };
 293
 294 enum {
 295         QDF_USER                = 0,
 296         QDF_CHANGE              = 1,
 297         QDF_LOCKED              = 2,
 298 };
 299
 300 struct gfs2_quota_data {
 301         struct list_head qd_list;
 302         unsigned int qd_count;
 303
 304         u32 qd_id;
 305         unsigned long qd_flags;         /* QDF_... */
 306
 307         s64 qd_change;
 308         s64 qd_change_sync;
 309
 310         unsigned int qd_slot;
 311         unsigned int qd_slot_count;
 312
 313         struct buffer_head *qd_bh;
 314         struct gfs2_quota_change *qd_bh_qc;
 315         unsigned int qd_bh_count;
 316
 317         struct gfs2_glock *qd_gl;
 318         struct gfs2_quota_lvb qd_qb;
 319
 320         u64 qd_sync_gen;
 321         unsigned long qd_last_warn;
 322         unsigned long qd_last_touched;
 323 };
 324
 325 struct gfs2_trans {
 326         unsigned long tr_ip;
 327
 328         unsigned int tr_blocks;
 329         unsigned int tr_revokes;
 330         unsigned int tr_reserved;
 331
 332         struct gfs2_holder tr_t_gh;
 333
 334         int tr_touched;
 335
 336         unsigned int tr_num_buf;
 337         unsigned int tr_num_buf_new;
 338         unsigned int tr_num_databuf_new;
 339         unsigned int tr_num_buf_rm;
 340         unsigned int tr_num_databuf_rm;
 341         struct list_head tr_list_buf;
 342
 343         unsigned int tr_num_revoke;
 344         unsigned int tr_num_revoke_rm;
 345 };
 346
 347 struct gfs2_ail {
 348         struct list_head ai_list;
 349
 350         unsigned int ai_first;
 351         struct list_head ai_ail1_list;
 352         struct list_head ai_ail2_list;
 353
 354         u64 ai_sync_gen;
 355 };
 356
 357 struct gfs2_journal_extent {
 358         struct list_head extent_list;
 359
 360         unsigned int lblock; /* First logical block */
 361         u64 dblock; /* First disk block */
 362         u64 blocks;
 363 };
 364
 365 struct gfs2_jdesc {
 366         struct list_head jd_list;
 367         struct list_head extent_list;
 368
 369         struct inode *jd_inode;
 370         unsigned int jd_jid;
 371         int jd_dirty;
 372
 373         unsigned int jd_blocks;
 374 };
 375
 376 struct gfs2_statfs_change_host {
 377         s64 sc_total;
 378         s64 sc_free;
 379         s64 sc_dinodes;
 380 };
 381
 382 #define GFS2_GLOCKD_DEFAULT     1
 383 #define GFS2_GLOCKD_MAX         16
 384
 385 #define GFS2_QUOTA_DEFAULT      GFS2_QUOTA_OFF
 386 #define GFS2_QUOTA_OFF          0
 387 #define GFS2_QUOTA_ACCOUNT      1
 388 #define GFS2_QUOTA_ON           2
 389
 390 #define GFS2_DATA_DEFAULT       GFS2_DATA_ORDERED
 391 #define GFS2_DATA_WRITEBACK     1
 392 #define GFS2_DATA_ORDERED       2
 393
 394 struct gfs2_args {
 395         char ar_lockproto[GFS2_LOCKNAME_LEN]; /* Name of the Lock Protocol */
 396         char ar_locktable[GFS2_LOCKNAME_LEN]; /* Name of the Lock Table */
 397         char ar_hostdata[GFS2_LOCKNAME_LEN]; /* Host specific data */
 398         int ar_spectator; /* Don't get a journal because we're always RO */
 399         int ar_ignore_local_fs; /* Don't optimize even if local_fs is 1 */
 400         int ar_localflocks; /* Let the VFS do flock|fcntl locks for us */
 401         int ar_localcaching; /* Local-style caching (dangerous on multihost) */
 402         int ar_debug; /* Oops on errors instead of trying to be graceful */
 403         int ar_upgrade; /* Upgrade ondisk/multihost format */
 404         unsigned int ar_num_glockd; /* Number of glockd threads */
 405         int ar_posix_acl; /* Enable posix acls */
 406         int ar_quota; /* off/account/on */
 407         int ar_suiddir; /* suiddir support */
 408         int ar_data; /* ordered/writeback */
 409 };
 410
 411 struct gfs2_tune {
 412         spinlock_t gt_spin;
 413
 414         unsigned int gt_demote_secs; /* Cache retention for unheld glock */
 415         unsigned int gt_incore_log_blocks;
 416         unsigned int gt_log_flush_secs;
 417
 418         unsigned int gt_recoverd_secs;
 419         unsigned int gt_logd_secs;
 420         unsigned int gt_quotad_secs;
 421
 422         unsigned int gt_quota_simul_sync; /* Max quotavals to sync at once */
 423         unsigned int gt_quota_warn_period; /* Secs between quota warn msgs */
 424         unsigned int gt_quota_scale_num; /* Numerator */
 425         unsigned int gt_quota_scale_den; /* Denominator */
 426         unsigned int gt_quota_cache_secs;
 427         unsigned int gt_quota_quantum; /* Secs between syncs to quota file */
 428         unsigned int gt_atime_quantum; /* Min secs between atime updates */
 429         unsigned int gt_new_files_jdata;
 430         unsigned int gt_new_files_directio;
 431         unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */
 432         unsigned int gt_stall_secs; /* Detects trouble! */
 433         unsigned int gt_complain_secs;
 434         unsigned int gt_statfs_quantum;
 435         unsigned int gt_statfs_slow;
 436 };
 437
 438 enum {
 439         SDF_JOURNAL_CHECKED     = 0,
 440         SDF_JOURNAL_LIVE        = 1,
 441         SDF_SHUTDOWN            = 2,
 442         SDF_NOATIME             = 3,
 443 };
 444
 445 #define GFS2_FSNAME_LEN         256
 446
 447 struct gfs2_inum_host {
 448         u64 no_formal_ino;
 449         u64 no_addr;
 450 };
 451
 452 struct gfs2_sb_host {
 453         u32 sb_magic;
 454         u32 sb_type;
 455         u32 sb_format;
 456
 457         u32 sb_fs_format;
 458         u32 sb_multihost_format;
 459         u32 sb_bsize;
 460         u32 sb_bsize_shift;
 461
 462         struct gfs2_inum_host sb_master_dir;
 463         struct gfs2_inum_host sb_root_dir;
 464
 465         char sb_lockproto[GFS2_LOCKNAME_LEN];
 466         char sb_locktable[GFS2_LOCKNAME_LEN];
 467 };
 468
 469 struct gfs2_sbd {
 470         struct super_block *sd_vfs;
 471         struct super_block *sd_vfs_meta;
 472         struct kobject sd_kobj;
 473         unsigned long sd_flags; /* SDF_... */
 474         struct gfs2_sb_host sd_sb;
 475
 476         /* Constants computed on mount */
 477
 478         u32 sd_fsb2bb;
 479         u32 sd_fsb2bb_shift;
 480         u32 sd_diptrs;  /* Number of pointers in a dinode */
 481         u32 sd_inptrs;  /* Number of pointers in a indirect block */
 482         u32 sd_jbsize;  /* Size of a journaled data block */
 483         u32 sd_hash_bsize;      /* sizeof(exhash block) */
 484         u32 sd_hash_bsize_shift;
 485         u32 sd_hash_ptrs;       /* Number of pointers in a hash block */
 486         u32 sd_qc_per_block;
 487         u32 sd_max_dirres;      /* Max blocks needed to add a directory entry */
 488         u32 sd_max_height;      /* Max height of a file's metadata tree */
 489         u64 sd_heightsize[GFS2_MAX_META_HEIGHT + 1];
 490         u32 sd_max_jheight; /* Max height of journaled file's meta tree */
 491         u64 sd_jheightsize[GFS2_MAX_META_HEIGHT + 1];
 492
 493         struct gfs2_args sd_args;       /* Mount arguments */
 494         struct gfs2_tune sd_tune;       /* Filesystem tuning structure */
 495
 496         /* Lock Stuff */
 497
 498         struct lm_lockstruct sd_lockstruct;
 499         struct list_head sd_reclaim_list;
 500         spinlock_t sd_reclaim_lock;
 501         wait_queue_head_t sd_reclaim_wq;
 502         atomic_t sd_reclaim_count;
 503         struct gfs2_holder sd_live_gh;
 504         struct gfs2_glock *sd_rename_gl;
 505         struct gfs2_glock *sd_trans_gl;
 506
 507         /* Inode Stuff */
 508
 509         struct inode *sd_master_dir;
 510         struct inode *sd_jindex;
 511         struct inode *sd_inum_inode;
 512         struct inode *sd_statfs_inode;
 513         struct inode *sd_ir_inode;
 514         struct inode *sd_sc_inode;
 515         struct inode *sd_qc_inode;
 516         struct inode *sd_rindex;
 517         struct inode *sd_quota_inode;
 518
 519         /* Inum stuff */
 520
 521         struct mutex sd_inum_mutex;
 522
 523         /* StatFS stuff */
 524
 525         spinlock_t sd_statfs_spin;
 526         struct gfs2_statfs_change_host sd_statfs_master;
 527         struct gfs2_statfs_change_host sd_statfs_local;
 528         unsigned long sd_statfs_sync_time;
 529
 530         /* Resource group stuff */
 531
 532         int sd_rindex_uptodate;
 533         spinlock_t sd_rindex_spin;
 534         struct mutex sd_rindex_mutex;
 535         struct list_head sd_rindex_list;
 536         struct list_head sd_rindex_mru_list;
 537         struct list_head sd_rindex_recent_list;
 538         struct gfs2_rgrpd *sd_rindex_forward;
 539         unsigned int sd_rgrps;
 540
 541         /* Journal index stuff */
 542
 543         struct list_head sd_jindex_list;
 544         spinlock_t sd_jindex_spin;
 545         struct mutex sd_jindex_mutex;
 546         unsigned int sd_journals;
 547         unsigned long sd_jindex_refresh_time;
 548
 549         struct gfs2_jdesc *sd_jdesc;
 550         struct gfs2_holder sd_journal_gh;
 551         struct gfs2_holder sd_jinode_gh;
 552
 553         struct gfs2_holder sd_ir_gh;
 554         struct gfs2_holder sd_sc_gh;
 555         struct gfs2_holder sd_qc_gh;
 556
 557         /* Daemon stuff */
 558
 559         struct task_struct *sd_recoverd_process;
 560         struct task_struct *sd_logd_process;
 561         struct task_struct *sd_quotad_process;
 562         struct task_struct *sd_glockd_process[GFS2_GLOCKD_MAX];
 563         unsigned int sd_glockd_num;
 564
 565         /* Quota stuff */
 566
 567         struct list_head sd_quota_list;
 568         atomic_t sd_quota_count;
 569         spinlock_t sd_quota_spin;
 570         struct mutex sd_quota_mutex;
 571
 572         unsigned int sd_quota_slots;
 573         unsigned int sd_quota_chunks;
 574         unsigned char **sd_quota_bitmap;
 575
 576         u64 sd_quota_sync_gen;
 577         unsigned long sd_quota_sync_time;
 578
 579         /* Log stuff */
 580
 581         spinlock_t sd_log_lock;
 582
 583         unsigned int sd_log_blks_reserved;
 584         unsigned int sd_log_commited_buf;
 585         unsigned int sd_log_commited_databuf;
 586         unsigned int sd_log_commited_revoke;
 587
 588         unsigned int sd_log_num_buf;
 589         unsigned int sd_log_num_revoke;
 590         unsigned int sd_log_num_rg;
 591         unsigned int sd_log_num_databuf;
 592
 593         struct list_head sd_log_le_buf;
 594         struct list_head sd_log_le_revoke;
 595         struct list_head sd_log_le_rg;
 596         struct list_head sd_log_le_databuf;
 597         struct list_head sd_log_le_ordered;
 598
 599         atomic_t sd_log_blks_free;
 600         struct mutex sd_log_reserve_mutex;
 601
 602         u64 sd_log_sequence;
 603         unsigned int sd_log_head;
 604         unsigned int sd_log_tail;
 605         int sd_log_idle;
 606
 607         unsigned long sd_log_flush_time;
 608         struct rw_semaphore sd_log_flush_lock;
 609         atomic_t sd_log_in_flight;
 610         wait_queue_head_t sd_log_flush_wait;
 611
 612         unsigned int sd_log_flush_head;
 613         u64 sd_log_flush_wrapped;
 614
 615         struct list_head sd_ail1_list;
 616         struct list_head sd_ail2_list;
 617         u64 sd_ail_sync_gen;
 618
 619         /* Replay stuff */
 620
 621         struct list_head sd_revoke_list;
 622         unsigned int sd_replay_tail;
 623
 624         unsigned int sd_found_blocks;
 625         unsigned int sd_found_revokes;
 626         unsigned int sd_replayed_blocks;
 627
 628         /* For quiescing the filesystem */
 629
 630         struct gfs2_holder sd_freeze_gh;
 631         struct mutex sd_freeze_lock;
 632         unsigned int sd_freeze_count;
 633
 634         /* Counters */
 635
 636         atomic_t sd_reclaimed;
 637
 638         char sd_fsname[GFS2_FSNAME_LEN];
 639         char sd_table_name[GFS2_FSNAME_LEN];
 640         char sd_proto_name[GFS2_FSNAME_LEN];
 641
 642         /* Debugging crud */
 643
 644         unsigned long sd_last_warning;
 645         struct vfsmount *sd_gfs2mnt;
 646         struct dentry *debugfs_dir;    /* debugfs directory */
 647         struct dentry *debugfs_dentry_glocks; /* for debugfs */
 648 };
 649
 650 #endif /* __INCORE_DOT_H__ */
 651