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 #include <linux/completion.h>
  21 #include <linux/rbtree.h>
  22
  23 #define DIO_WAIT        0x00000010
  24 #define DIO_METADATA    0x00000020
  25
  26 struct gfs2_log_operations;
  27 struct gfs2_log_element;
  28 struct gfs2_holder;
  29 struct gfs2_glock;
  30 struct gfs2_quota_data;
  31 struct gfs2_trans;
  32 struct gfs2_ail;
  33 struct gfs2_jdesc;
  34 struct gfs2_sbd;
  35 struct lm_lockops;
  36
  37 typedef void (*gfs2_glop_bh_t) (struct gfs2_glock *gl, unsigned int ret);
  38
  39 struct gfs2_log_header_host {
  40         u64 lh_sequence;        /* Sequence number of this transaction */
  41         u32 lh_flags;           /* GFS2_LOG_HEAD_... */
  42         u32 lh_tail;            /* Block number of log tail */
  43         u32 lh_blkno;
  44         u32 lh_hash;
  45 };
  46
  47 /*
  48  * Structure of operations that are associated with each
  49  * type of element in the log.
  50  */
  51
  52 struct gfs2_log_operations {
  53         void (*lo_add) (struct gfs2_sbd *sdp, struct gfs2_log_element *le);
  54         void (*lo_before_commit) (struct gfs2_sbd *sdp);
  55         void (*lo_after_commit) (struct gfs2_sbd *sdp, struct gfs2_ail *ai);
  56         void (*lo_before_scan) (struct gfs2_jdesc *jd,
  57                                 struct gfs2_log_header_host *head, int pass);
  58         int (*lo_scan_elements) (struct gfs2_jdesc *jd, unsigned int start,
  59                                  struct gfs2_log_descriptor *ld, __be64 *ptr,
  60                                  int pass);
  61         void (*lo_after_scan) (struct gfs2_jdesc *jd, int error, int pass);
  62         const char *lo_name;
  63 };
  64
  65 struct gfs2_log_element {
  66         struct list_head le_list;
  67         const struct gfs2_log_operations *le_ops;
  68 };
  69
  70 #define GBF_FULL 1
  71
  72 struct gfs2_bitmap {
  73         struct buffer_head *bi_bh;
  74         char *bi_clone;
  75         unsigned long bi_flags;
  76         u32 bi_offset;
  77         u32 bi_start;
  78         u32 bi_len;
  79 };
  80
  81 struct gfs2_rgrpd {
  82         struct rb_node rd_node;         /* Link with superblock */
  83         struct gfs2_glock *rd_gl;       /* Glock for this rgrp */
  84         u64 rd_addr;                    /* grp block disk address */
  85         u64 rd_data0;                   /* first data location */
  86         u32 rd_length;                  /* length of rgrp header in fs blocks */
  87         u32 rd_data;                    /* num of data blocks in rgrp */
  88         u32 rd_bitbytes;                /* number of bytes in data bitmaps */
  89         u32 rd_free;
  90         u32 rd_free_clone;
  91         u32 rd_dinodes;
  92         u64 rd_igeneration;
  93         struct gfs2_bitmap *rd_bits;
  94         struct gfs2_sbd *rd_sbd;
  95         u32 rd_last_alloc;
  96         u32 rd_flags;
  97 #define GFS2_RDF_CHECK          0x10000000 /* check for unlinked inodes */
  98 #define GFS2_RDF_UPTODATE       0x20000000 /* rg is up to date */
  99 #define GFS2_RDF_ERROR          0x40000000 /* error in rg */
 100 #define GFS2_RDF_MASK           0xf0000000 /* mask for internal flags */
 101 };
 102
 103 enum gfs2_state_bits {
 104         BH_Pinned = BH_PrivateStart,
 105         BH_Escaped = BH_PrivateStart + 1,
 106         BH_Zeronew = BH_PrivateStart + 2,
 107 };
 108
 109 BUFFER_FNS(Pinned, pinned)
 110 TAS_BUFFER_FNS(Pinned, pinned)
 111 BUFFER_FNS(Escaped, escaped)
 112 TAS_BUFFER_FNS(Escaped, escaped)
 113 BUFFER_FNS(Zeronew, zeronew)
 114 TAS_BUFFER_FNS(Zeronew, zeronew)
 115
 116 struct gfs2_bufdata {
 117         struct buffer_head *bd_bh;
 118         struct gfs2_glock *bd_gl;
 119
 120         union {
 121                 struct list_head list_tr;
 122                 u64 blkno;
 123         } u;
 124 #define bd_list_tr u.list_tr
 125 #define bd_blkno u.blkno
 126
 127         struct gfs2_log_element bd_le;
 128
 129         struct gfs2_ail *bd_ail;
 130         struct list_head bd_ail_st_list;
 131         struct list_head bd_ail_gl_list;
 132 };
 133
 134 /*
 135  * Internally, we prefix things with gdlm_ and GDLM_ (for gfs-dlm) since a
 136  * prefix of lock_dlm_ gets awkward.
 137  */
 138
 139 #define GDLM_STRNAME_BYTES      25
 140 #define GDLM_LVB_SIZE           32
 141
 142 /*
 143  * ls_recover_flags:
 144  *
 145  * DFL_BLOCK_LOCKS: dlm is in recovery and will grant locks that had been
 146  * held by failed nodes whose journals need recovery.  Those locks should
 147  * only be used for journal recovery until the journal recovery is done.
 148  * This is set by the dlm recover_prep callback and cleared by the
 149  * gfs2_control thread when journal recovery is complete.  To avoid
 150  * races between recover_prep setting and gfs2_control clearing, recover_spin
 151  * is held while changing this bit and reading/writing recover_block
 152  * and recover_start.
 153  *
 154  * DFL_NO_DLM_OPS: dlm lockspace ops/callbacks are not being used.
 155  *
 156  * DFL_FIRST_MOUNT: this node is the first to mount this fs and is doing
 157  * recovery of all journals before allowing other nodes to mount the fs.
 158  * This is cleared when FIRST_MOUNT_DONE is set.
 159  *
 160  * DFL_FIRST_MOUNT_DONE: this node was the first mounter, and has finished
 161  * recovery of all journals, and now allows other nodes to mount the fs.
 162  *
 163  * DFL_MOUNT_DONE: gdlm_mount has completed successfully and cleared
 164  * BLOCK_LOCKS for the first time.  The gfs2_control thread should now
 165  * control clearing BLOCK_LOCKS for further recoveries.
 166  *
 167  * DFL_UNMOUNT: gdlm_unmount sets to keep sdp off gfs2_control_wq.
 168  *
 169  * DFL_DLM_RECOVERY: set while dlm is in recovery, between recover_prep()
 170  * and recover_done(), i.e. set while recover_block == recover_start.
 171  */
 172
 173 enum {
 174         DFL_BLOCK_LOCKS         = 0,
 175         DFL_NO_DLM_OPS          = 1,
 176         DFL_FIRST_MOUNT         = 2,
 177         DFL_FIRST_MOUNT_DONE    = 3,
 178         DFL_MOUNT_DONE          = 4,
 179         DFL_UNMOUNT             = 5,
 180         DFL_DLM_RECOVERY        = 6,
 181 };
 182
 183 struct lm_lockname {
 184         u64 ln_number;
 185         unsigned int ln_type;
 186 };
 187
 188 #define lm_name_equal(name1, name2) \
 189         (((name1)->ln_number == (name2)->ln_number) && \
 190          ((name1)->ln_type == (name2)->ln_type))
 191
 192
 193 struct gfs2_glock_operations {
 194         void (*go_xmote_th) (struct gfs2_glock *gl);
 195         int (*go_xmote_bh) (struct gfs2_glock *gl, struct gfs2_holder *gh);
 196         void (*go_inval) (struct gfs2_glock *gl, int flags);
 197         int (*go_demote_ok) (const struct gfs2_glock *gl);
 198         int (*go_lock) (struct gfs2_holder *gh);
 199         void (*go_unlock) (struct gfs2_holder *gh);
 200         int (*go_dump)(struct seq_file *seq, const struct gfs2_glock *gl);
 201         void (*go_callback) (struct gfs2_glock *gl);
 202         const int go_type;
 203         const unsigned long go_flags;
 204 #define GLOF_ASPACE 1
 205 };
 206
 207 enum {
 208         /* States */
 209         HIF_HOLDER              = 6,  /* Set for gh that "holds" the glock */
 210         HIF_FIRST               = 7,
 211         HIF_WAIT                = 10,
 212 };
 213
 214 struct gfs2_holder {
 215         struct list_head gh_list;
 216
 217         struct gfs2_glock *gh_gl;
 218         struct pid *gh_owner_pid;
 219         unsigned int gh_state;
 220         unsigned gh_flags;
 221
 222         int gh_error;
 223         unsigned long gh_iflags; /* HIF_... */
 224         unsigned long gh_ip;
 225 };
 226
 227 enum {
 228         GLF_LOCK                        = 1,
 229         GLF_DEMOTE                      = 3,
 230         GLF_PENDING_DEMOTE              = 4,
 231         GLF_DEMOTE_IN_PROGRESS          = 5,
 232         GLF_DIRTY                       = 6,
 233         GLF_LFLUSH                      = 7,
 234         GLF_INVALIDATE_IN_PROGRESS      = 8,
 235         GLF_REPLY_PENDING               = 9,
 236         GLF_INITIAL                     = 10,
 237         GLF_FROZEN                      = 11,
 238         GLF_QUEUED                      = 12,
 239         GLF_LRU                         = 13,
 240         GLF_OBJECT                      = 14, /* Used only for tracing */
 241 };
 242
 243 struct gfs2_glock {
 244         struct hlist_bl_node gl_list;
 245         unsigned long gl_flags;         /* GLF_... */
 246         struct lm_lockname gl_name;
 247         atomic_t gl_ref;
 248
 249         spinlock_t gl_spin;
 250
 251         /* State fields protected by gl_spin */
 252         unsigned int gl_state:2,        /* Current state */
 253                      gl_target:2,       /* Target state */
 254                      gl_demote_state:2, /* State requested by remote node */
 255                      gl_req:2,          /* State in last dlm request */
 256                      gl_reply:8;        /* Last reply from the dlm */
 257
 258         unsigned int gl_hash;
 259         unsigned long gl_demote_time; /* time of first demote request */
 260         long gl_hold_time;
 261         struct list_head gl_holders;
 262
 263         const struct gfs2_glock_operations *gl_ops;
 264         char gl_strname[GDLM_STRNAME_BYTES];
 265         struct dlm_lksb gl_lksb;
 266         char gl_lvb[32];
 267         unsigned long gl_tchange;
 268         void *gl_object;
 269
 270         struct list_head gl_lru;
 271
 272         struct gfs2_sbd *gl_sbd;
 273
 274         struct list_head gl_ail_list;
 275         atomic_t gl_ail_count;
 276         atomic_t gl_revokes;
 277         struct delayed_work gl_work;
 278         struct work_struct gl_delete;
 279         struct rcu_head gl_rcu;
 280 };
 281
 282 #define GFS2_MIN_LVB_SIZE 32    /* Min size of LVB that gfs2 supports */
 283
 284 struct gfs2_qadata { /* quota allocation data */
 285         /* Quota stuff */
 286         struct gfs2_quota_data *qa_qd[2*MAXQUOTAS];
 287         struct gfs2_holder qa_qd_ghs[2*MAXQUOTAS];
 288         unsigned int qa_qd_num;
 289 };
 290
 291 struct gfs2_blkreserv {
 292         u32 rs_requested; /* Filled in by caller of gfs2_inplace_reserve() */
 293         struct gfs2_holder rs_rgd_gh; /* Filled in by gfs2_inplace_reserve() */
 294 };
 295
 296 enum {
 297         GIF_INVALID             = 0,
 298         GIF_QD_LOCKED           = 1,
 299         GIF_ALLOC_FAILED        = 2,
 300         GIF_SW_PAGED            = 3,
 301 };
 302
 303
 304 struct gfs2_inode {
 305         struct inode i_inode;
 306         u64 i_no_addr;
 307         u64 i_no_formal_ino;
 308         u64 i_generation;
 309         u64 i_eattr;
 310         unsigned long i_flags;          /* GIF_... */
 311         struct gfs2_glock *i_gl; /* Move into i_gh? */
 312         struct gfs2_holder i_iopen_gh;
 313         struct gfs2_holder i_gh; /* for prepare/commit_write only */
 314         struct gfs2_qadata *i_qadata; /* quota allocation data */
 315         struct gfs2_blkreserv *i_res; /* resource group block reservation */
 316         struct gfs2_rgrpd *i_rgd;
 317         u64 i_goal;     /* goal block for allocations */
 318         struct rw_semaphore i_rw_mutex;
 319         struct list_head i_trunc_list;
 320         __be64 *i_hash_cache;
 321         u32 i_entries;
 322         u32 i_diskflags;
 323         u8 i_height;
 324         u8 i_depth;
 325 };
 326
 327 /*
 328  * Since i_inode is the first element of struct gfs2_inode,
 329  * this is effectively a cast.
 330  */
 331 static inline struct gfs2_inode *GFS2_I(struct inode *inode)
 332 {
 333         return container_of(inode, struct gfs2_inode, i_inode);
 334 }
 335
 336 static inline struct gfs2_sbd *GFS2_SB(const struct inode *inode)
 337 {
 338         return inode->i_sb->s_fs_info;
 339 }
 340
 341 struct gfs2_file {
 342         struct mutex f_fl_mutex;
 343         struct gfs2_holder f_fl_gh;
 344 };
 345
 346 struct gfs2_revoke_replay {
 347         struct list_head rr_list;
 348         u64 rr_blkno;
 349         unsigned int rr_where;
 350 };
 351
 352 enum {
 353         QDF_USER                = 0,
 354         QDF_CHANGE              = 1,
 355         QDF_LOCKED              = 2,
 356         QDF_REFRESH             = 3,
 357 };
 358
 359 struct gfs2_quota_data {
 360         struct list_head qd_list;
 361         struct list_head qd_reclaim;
 362
 363         atomic_t qd_count;
 364
 365         u32 qd_id;
 366         unsigned long qd_flags;         /* QDF_... */
 367
 368         s64 qd_change;
 369         s64 qd_change_sync;
 370
 371         unsigned int qd_slot;
 372         unsigned int qd_slot_count;
 373
 374         struct buffer_head *qd_bh;
 375         struct gfs2_quota_change *qd_bh_qc;
 376         unsigned int qd_bh_count;
 377
 378         struct gfs2_glock *qd_gl;
 379         struct gfs2_quota_lvb qd_qb;
 380
 381         u64 qd_sync_gen;
 382         unsigned long qd_last_warn;
 383 };
 384
 385 struct gfs2_trans {
 386         unsigned long tr_ip;
 387
 388         unsigned int tr_blocks;
 389         unsigned int tr_revokes;
 390         unsigned int tr_reserved;
 391
 392         struct gfs2_holder tr_t_gh;
 393
 394         int tr_touched;
 395
 396         unsigned int tr_num_buf;
 397         unsigned int tr_num_buf_new;
 398         unsigned int tr_num_databuf_new;
 399         unsigned int tr_num_buf_rm;
 400         unsigned int tr_num_databuf_rm;
 401         struct list_head tr_list_buf;
 402
 403         unsigned int tr_num_revoke;
 404         unsigned int tr_num_revoke_rm;
 405 };
 406
 407 struct gfs2_ail {
 408         struct list_head ai_list;
 409
 410         unsigned int ai_first;
 411         struct list_head ai_ail1_list;
 412         struct list_head ai_ail2_list;
 413 };
 414
 415 struct gfs2_journal_extent {
 416         struct list_head extent_list;
 417
 418         unsigned int lblock; /* First logical block */
 419         u64 dblock; /* First disk block */
 420         u64 blocks;
 421 };
 422
 423 struct gfs2_jdesc {
 424         struct list_head jd_list;
 425         struct list_head extent_list;
 426         struct work_struct jd_work;
 427         struct inode *jd_inode;
 428         unsigned long jd_flags;
 429 #define JDF_RECOVERY 1
 430         unsigned int jd_jid;
 431         unsigned int jd_blocks;
 432         int jd_recover_error;
 433 };
 434
 435 struct gfs2_statfs_change_host {
 436         s64 sc_total;
 437         s64 sc_free;
 438         s64 sc_dinodes;
 439 };
 440
 441 #define GFS2_QUOTA_DEFAULT      GFS2_QUOTA_OFF
 442 #define GFS2_QUOTA_OFF          0
 443 #define GFS2_QUOTA_ACCOUNT      1
 444 #define GFS2_QUOTA_ON           2
 445
 446 #define GFS2_DATA_DEFAULT       GFS2_DATA_ORDERED
 447 #define GFS2_DATA_WRITEBACK     1
 448 #define GFS2_DATA_ORDERED       2
 449
 450 #define GFS2_ERRORS_DEFAULT     GFS2_ERRORS_WITHDRAW
 451 #define GFS2_ERRORS_WITHDRAW    0
 452 #define GFS2_ERRORS_CONTINUE    1 /* place holder for future feature */
 453 #define GFS2_ERRORS_RO          2 /* place holder for future feature */
 454 #define GFS2_ERRORS_PANIC       3
 455
 456 struct gfs2_args {
 457         char ar_lockproto[GFS2_LOCKNAME_LEN];   /* Name of the Lock Protocol */
 458         char ar_locktable[GFS2_LOCKNAME_LEN];   /* Name of the Lock Table */
 459         char ar_hostdata[GFS2_LOCKNAME_LEN];    /* Host specific data */
 460         unsigned int ar_spectator:1;            /* Don't get a journal */
 461         unsigned int ar_localflocks:1;          /* Let the VFS do flock|fcntl */
 462         unsigned int ar_debug:1;                /* Oops on errors */
 463         unsigned int ar_posix_acl:1;            /* Enable posix acls */
 464         unsigned int ar_quota:2;                /* off/account/on */
 465         unsigned int ar_suiddir:1;              /* suiddir support */
 466         unsigned int ar_data:2;                 /* ordered/writeback */
 467         unsigned int ar_meta:1;                 /* mount metafs */
 468         unsigned int ar_discard:1;              /* discard requests */
 469         unsigned int ar_errors:2;               /* errors=withdraw | panic */
 470         unsigned int ar_nobarrier:1;            /* do not send barriers */
 471         int ar_commit;                          /* Commit interval */
 472         int ar_statfs_quantum;                  /* The fast statfs interval */
 473         int ar_quota_quantum;                   /* The quota interval */
 474         int ar_statfs_percent;                  /* The % change to force sync */
 475 };
 476
 477 struct gfs2_tune {
 478         spinlock_t gt_spin;
 479
 480         unsigned int gt_logd_secs;
 481
 482         unsigned int gt_quota_simul_sync; /* Max quotavals to sync at once */
 483         unsigned int gt_quota_warn_period; /* Secs between quota warn msgs */
 484         unsigned int gt_quota_scale_num; /* Numerator */
 485         unsigned int gt_quota_scale_den; /* Denominator */
 486         unsigned int gt_quota_quantum; /* Secs between syncs to quota file */
 487         unsigned int gt_new_files_jdata;
 488         unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */
 489         unsigned int gt_complain_secs;
 490         unsigned int gt_statfs_quantum;
 491         unsigned int gt_statfs_slow;
 492 };
 493
 494 enum {
 495         SDF_JOURNAL_CHECKED     = 0,
 496         SDF_JOURNAL_LIVE        = 1,
 497         SDF_SHUTDOWN            = 2,
 498         SDF_NOBARRIERS          = 3,
 499         SDF_NORECOVERY          = 4,
 500         SDF_DEMOTE              = 5,
 501         SDF_NOJOURNALID         = 6,
 502         SDF_RORECOVERY          = 7, /* read only recovery */
 503 };
 504
 505 #define GFS2_FSNAME_LEN         256
 506
 507 struct gfs2_inum_host {
 508         u64 no_formal_ino;
 509         u64 no_addr;
 510 };
 511
 512 struct gfs2_sb_host {
 513         u32 sb_magic;
 514         u32 sb_type;
 515         u32 sb_format;
 516
 517         u32 sb_fs_format;
 518         u32 sb_multihost_format;
 519         u32 sb_bsize;
 520         u32 sb_bsize_shift;
 521
 522         struct gfs2_inum_host sb_master_dir;
 523         struct gfs2_inum_host sb_root_dir;
 524
 525         char sb_lockproto[GFS2_LOCKNAME_LEN];
 526         char sb_locktable[GFS2_LOCKNAME_LEN];
 527 };
 528
 529 /*
 530  * lm_mount() return values
 531  *
 532  * ls_jid - the journal ID this node should use
 533  * ls_first - this node is the first to mount the file system
 534  * ls_lockspace - lock module's context for this file system
 535  * ls_ops - lock module's functions
 536  */
 537
 538 struct lm_lockstruct {
 539         int ls_jid;
 540         unsigned int ls_first;
 541         unsigned int ls_nodir;
 542         const struct lm_lockops *ls_ops;
 543         dlm_lockspace_t *ls_dlm;
 544
 545         int ls_recover_jid_done;   /* These two are deprecated, */
 546         int ls_recover_jid_status; /* used previously by gfs_controld */
 547
 548         struct dlm_lksb ls_mounted_lksb; /* mounted_lock */
 549         struct dlm_lksb ls_control_lksb; /* control_lock */
 550         char ls_control_lvb[GDLM_LVB_SIZE]; /* control_lock lvb */
 551         struct completion ls_sync_wait; /* {control,mounted}_{lock,unlock} */
 552
 553         spinlock_t ls_recover_spin; /* protects following fields */
 554         unsigned long ls_recover_flags; /* DFL_ */
 555         uint32_t ls_recover_mount; /* gen in first recover_done cb */
 556         uint32_t ls_recover_start; /* gen in last recover_done cb */
 557         uint32_t ls_recover_block; /* copy recover_start in last recover_prep */
 558         uint32_t ls_recover_size; /* size of recover_submit, recover_result */
 559         uint32_t *ls_recover_submit; /* gen in last recover_slot cb per jid */
 560         uint32_t *ls_recover_result; /* result of last jid recovery */
 561 };
 562
 563 struct gfs2_sbd {
 564         struct super_block *sd_vfs;
 565         struct kobject sd_kobj;
 566         unsigned long sd_flags; /* SDF_... */
 567         struct gfs2_sb_host sd_sb;
 568
 569         /* Constants computed on mount */
 570
 571         u32 sd_fsb2bb;
 572         u32 sd_fsb2bb_shift;
 573         u32 sd_diptrs;  /* Number of pointers in a dinode */
 574         u32 sd_inptrs;  /* Number of pointers in a indirect block */
 575         u32 sd_jbsize;  /* Size of a journaled data block */
 576         u32 sd_hash_bsize;      /* sizeof(exhash block) */
 577         u32 sd_hash_bsize_shift;
 578         u32 sd_hash_ptrs;       /* Number of pointers in a hash block */
 579         u32 sd_qc_per_block;
 580         u32 sd_max_dirres;      /* Max blocks needed to add a directory entry */
 581         u32 sd_max_height;      /* Max height of a file's metadata tree */
 582         u64 sd_heightsize[GFS2_MAX_META_HEIGHT + 1];
 583         u32 sd_max_jheight; /* Max height of journaled file's meta tree */
 584         u64 sd_jheightsize[GFS2_MAX_META_HEIGHT + 1];
 585
 586         struct gfs2_args sd_args;       /* Mount arguments */
 587         struct gfs2_tune sd_tune;       /* Filesystem tuning structure */
 588
 589         /* Lock Stuff */
 590
 591         struct lm_lockstruct sd_lockstruct;
 592         struct gfs2_holder sd_live_gh;
 593         struct gfs2_glock *sd_rename_gl;
 594         struct gfs2_glock *sd_trans_gl;
 595         wait_queue_head_t sd_glock_wait;
 596         atomic_t sd_glock_disposal;
 597         struct completion sd_locking_init;
 598         struct delayed_work sd_control_work;
 599
 600         /* Inode Stuff */
 601
 602         struct dentry *sd_master_dir;
 603         struct dentry *sd_root_dir;
 604
 605         struct inode *sd_jindex;
 606         struct inode *sd_statfs_inode;
 607         struct inode *sd_sc_inode;
 608         struct inode *sd_qc_inode;
 609         struct inode *sd_rindex;
 610         struct inode *sd_quota_inode;
 611
 612         /* StatFS stuff */
 613
 614         spinlock_t sd_statfs_spin;
 615         struct gfs2_statfs_change_host sd_statfs_master;
 616         struct gfs2_statfs_change_host sd_statfs_local;
 617         int sd_statfs_force_sync;
 618
 619         /* Resource group stuff */
 620
 621         int sd_rindex_uptodate;
 622         spinlock_t sd_rindex_spin;
 623         struct mutex sd_rindex_mutex;
 624         struct rb_root sd_rindex_tree;
 625         unsigned int sd_rgrps;
 626         unsigned int sd_max_rg_data;
 627
 628         /* Journal index stuff */
 629
 630         struct list_head sd_jindex_list;
 631         spinlock_t sd_jindex_spin;
 632         struct mutex sd_jindex_mutex;
 633         unsigned int sd_journals;
 634
 635         struct gfs2_jdesc *sd_jdesc;
 636         struct gfs2_holder sd_journal_gh;
 637         struct gfs2_holder sd_jinode_gh;
 638
 639         struct gfs2_holder sd_sc_gh;
 640         struct gfs2_holder sd_qc_gh;
 641
 642         /* Daemon stuff */
 643
 644         struct task_struct *sd_logd_process;
 645         struct task_struct *sd_quotad_process;
 646
 647         /* Quota stuff */
 648
 649         struct list_head sd_quota_list;
 650         atomic_t sd_quota_count;
 651         struct mutex sd_quota_mutex;
 652         wait_queue_head_t sd_quota_wait;
 653         struct list_head sd_trunc_list;
 654         spinlock_t sd_trunc_lock;
 655
 656         unsigned int sd_quota_slots;
 657         unsigned int sd_quota_chunks;
 658         unsigned char **sd_quota_bitmap;
 659
 660         u64 sd_quota_sync_gen;
 661
 662         /* Log stuff */
 663
 664         spinlock_t sd_log_lock;
 665
 666         unsigned int sd_log_blks_reserved;
 667         unsigned int sd_log_commited_buf;
 668         unsigned int sd_log_commited_databuf;
 669         int sd_log_commited_revoke;
 670
 671         atomic_t sd_log_pinned;
 672         unsigned int sd_log_num_buf;
 673         unsigned int sd_log_num_revoke;
 674         unsigned int sd_log_num_rg;
 675         unsigned int sd_log_num_databuf;
 676
 677         struct list_head sd_log_le_buf;
 678         struct list_head sd_log_le_revoke;
 679         struct list_head sd_log_le_rg;
 680         struct list_head sd_log_le_databuf;
 681         struct list_head sd_log_le_ordered;
 682
 683         atomic_t sd_log_thresh1;
 684         atomic_t sd_log_thresh2;
 685         atomic_t sd_log_blks_free;
 686         wait_queue_head_t sd_log_waitq;
 687         wait_queue_head_t sd_logd_waitq;
 688
 689         u64 sd_log_sequence;
 690         unsigned int sd_log_head;
 691         unsigned int sd_log_tail;
 692         int sd_log_idle;
 693
 694         struct rw_semaphore sd_log_flush_lock;
 695         atomic_t sd_log_in_flight;
 696         wait_queue_head_t sd_log_flush_wait;
 697
 698         unsigned int sd_log_flush_head;
 699         u64 sd_log_flush_wrapped;
 700
 701         spinlock_t sd_ail_lock;
 702         struct list_head sd_ail1_list;
 703         struct list_head sd_ail2_list;
 704
 705         /* Replay stuff */
 706
 707         struct list_head sd_revoke_list;
 708         unsigned int sd_replay_tail;
 709
 710         unsigned int sd_found_blocks;
 711         unsigned int sd_found_revokes;
 712         unsigned int sd_replayed_blocks;
 713
 714         /* For quiescing the filesystem */
 715
 716         struct gfs2_holder sd_freeze_gh;
 717         struct mutex sd_freeze_lock;
 718         unsigned int sd_freeze_count;
 719
 720         char sd_fsname[GFS2_FSNAME_LEN];
 721         char sd_table_name[GFS2_FSNAME_LEN];
 722         char sd_proto_name[GFS2_FSNAME_LEN];
 723
 724         /* Debugging crud */
 725
 726         unsigned long sd_last_warning;
 727         struct dentry *debugfs_dir;    /* debugfs directory */
 728         struct dentry *debugfs_dentry_glocks; /* for debugfs */
 729 };
 730
 731 #endif /* __INCORE_DOT_H__ */
 732