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 #include <linux/ktime.h>
  23 #include <linux/percpu.h>
  24
  25 #define DIO_WAIT        0x00000010
  26 #define DIO_METADATA    0x00000020
  27
  28 struct gfs2_log_operations;
  29 struct gfs2_log_element;
  30 struct gfs2_holder;
  31 struct gfs2_glock;
  32 struct gfs2_quota_data;
  33 struct gfs2_trans;
  34 struct gfs2_ail;
  35 struct gfs2_jdesc;
  36 struct gfs2_sbd;
  37 struct lm_lockops;
  38
  39 typedef void (*gfs2_glop_bh_t) (struct gfs2_glock *gl, unsigned int ret);
  40
  41 struct gfs2_log_header_host {
  42         u64 lh_sequence;        /* Sequence number of this transaction */
  43         u32 lh_flags;           /* GFS2_LOG_HEAD_... */
  44         u32 lh_tail;            /* Block number of log tail */
  45         u32 lh_blkno;
  46         u32 lh_hash;
  47 };
  48
  49 /*
  50  * Structure of operations that are associated with each
  51  * type of element in the log.
  52  */
  53
  54 struct gfs2_log_operations {
  55         void (*lo_add) (struct gfs2_sbd *sdp, struct gfs2_log_element *le);
  56         void (*lo_before_commit) (struct gfs2_sbd *sdp);
  57         void (*lo_after_commit) (struct gfs2_sbd *sdp, struct gfs2_ail *ai);
  58         void (*lo_before_scan) (struct gfs2_jdesc *jd,
  59                                 struct gfs2_log_header_host *head, int pass);
  60         int (*lo_scan_elements) (struct gfs2_jdesc *jd, unsigned int start,
  61                                  struct gfs2_log_descriptor *ld, __be64 *ptr,
  62                                  int pass);
  63         void (*lo_after_scan) (struct gfs2_jdesc *jd, int error, int pass);
  64         const char *lo_name;
  65 };
  66
  67 struct gfs2_log_element {
  68         struct list_head le_list;
  69         const struct gfs2_log_operations *le_ops;
  70 };
  71
  72 #define GBF_FULL 1
  73
  74 struct gfs2_bitmap {
  75         struct buffer_head *bi_bh;
  76         char *bi_clone;
  77         unsigned long bi_flags;
  78         u32 bi_offset;
  79         u32 bi_start;
  80         u32 bi_len;
  81 };
  82
  83 struct gfs2_rgrpd {
  84         struct rb_node rd_node;         /* Link with superblock */
  85         struct gfs2_glock *rd_gl;       /* Glock for this rgrp */
  86         u64 rd_addr;                    /* grp block disk address */
  87         u64 rd_data0;                   /* first data location */
  88         u32 rd_length;                  /* length of rgrp header in fs blocks */
  89         u32 rd_data;                    /* num of data blocks in rgrp */
  90         u32 rd_bitbytes;                /* number of bytes in data bitmaps */
  91         u32 rd_free;
  92         u32 rd_free_clone;
  93         u32 rd_dinodes;
  94         u64 rd_igeneration;
  95         struct gfs2_bitmap *rd_bits;
  96         struct gfs2_sbd *rd_sbd;
  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         BH_Zeronew = BH_PrivateStart + 2,
 109 };
 110
 111 BUFFER_FNS(Pinned, pinned)
 112 TAS_BUFFER_FNS(Pinned, pinned)
 113 BUFFER_FNS(Escaped, escaped)
 114 TAS_BUFFER_FNS(Escaped, escaped)
 115 BUFFER_FNS(Zeronew, zeronew)
 116 TAS_BUFFER_FNS(Zeronew, zeronew)
 117
 118 struct gfs2_bufdata {
 119         struct buffer_head *bd_bh;
 120         struct gfs2_glock *bd_gl;
 121
 122         union {
 123                 struct list_head list_tr;
 124                 u64 blkno;
 125         } u;
 126 #define bd_list_tr u.list_tr
 127 #define bd_blkno u.blkno
 128
 129         struct gfs2_log_element bd_le;
 130
 131         struct gfs2_ail *bd_ail;
 132         struct list_head bd_ail_st_list;
 133         struct list_head bd_ail_gl_list;
 134 };
 135
 136 /*
 137  * Internally, we prefix things with gdlm_ and GDLM_ (for gfs-dlm) since a
 138  * prefix of lock_dlm_ gets awkward.
 139  */
 140
 141 #define GDLM_STRNAME_BYTES      25
 142 #define GDLM_LVB_SIZE           32
 143
 144 /*
 145  * ls_recover_flags:
 146  *
 147  * DFL_BLOCK_LOCKS: dlm is in recovery and will grant locks that had been
 148  * held by failed nodes whose journals need recovery.  Those locks should
 149  * only be used for journal recovery until the journal recovery is done.
 150  * This is set by the dlm recover_prep callback and cleared by the
 151  * gfs2_control thread when journal recovery is complete.  To avoid
 152  * races between recover_prep setting and gfs2_control clearing, recover_spin
 153  * is held while changing this bit and reading/writing recover_block
 154  * and recover_start.
 155  *
 156  * DFL_NO_DLM_OPS: dlm lockspace ops/callbacks are not being used.
 157  *
 158  * DFL_FIRST_MOUNT: this node is the first to mount this fs and is doing
 159  * recovery of all journals before allowing other nodes to mount the fs.
 160  * This is cleared when FIRST_MOUNT_DONE is set.
 161  *
 162  * DFL_FIRST_MOUNT_DONE: this node was the first mounter, and has finished
 163  * recovery of all journals, and now allows other nodes to mount the fs.
 164  *
 165  * DFL_MOUNT_DONE: gdlm_mount has completed successfully and cleared
 166  * BLOCK_LOCKS for the first time.  The gfs2_control thread should now
 167  * control clearing BLOCK_LOCKS for further recoveries.
 168  *
 169  * DFL_UNMOUNT: gdlm_unmount sets to keep sdp off gfs2_control_wq.
 170  *
 171  * DFL_DLM_RECOVERY: set while dlm is in recovery, between recover_prep()
 172  * and recover_done(), i.e. set while recover_block == recover_start.
 173  */
 174
 175 enum {
 176         DFL_BLOCK_LOCKS         = 0,
 177         DFL_NO_DLM_OPS          = 1,
 178         DFL_FIRST_MOUNT         = 2,
 179         DFL_FIRST_MOUNT_DONE    = 3,
 180         DFL_MOUNT_DONE          = 4,
 181         DFL_UNMOUNT             = 5,
 182         DFL_DLM_RECOVERY        = 6,
 183 };
 184
 185 struct lm_lockname {
 186         u64 ln_number;
 187         unsigned int ln_type;
 188 };
 189
 190 #define lm_name_equal(name1, name2) \
 191         (((name1)->ln_number == (name2)->ln_number) && \
 192          ((name1)->ln_type == (name2)->ln_type))
 193
 194
 195 struct gfs2_glock_operations {
 196         void (*go_xmote_th) (struct gfs2_glock *gl);
 197         int (*go_xmote_bh) (struct gfs2_glock *gl, struct gfs2_holder *gh);
 198         void (*go_inval) (struct gfs2_glock *gl, int flags);
 199         int (*go_demote_ok) (const struct gfs2_glock *gl);
 200         int (*go_lock) (struct gfs2_holder *gh);
 201         void (*go_unlock) (struct gfs2_holder *gh);
 202         int (*go_dump)(struct seq_file *seq, const struct gfs2_glock *gl);
 203         void (*go_callback) (struct gfs2_glock *gl);
 204         const int go_type;
 205         const unsigned long go_flags;
 206 #define GLOF_ASPACE 1
 207 };
 208
 209 enum {
 210         GFS2_LKS_SRTT = 0,      /* Non blocking smoothed round trip time */
 211         GFS2_LKS_SRTTVAR = 1,   /* Non blocking smoothed variance */
 212         GFS2_LKS_SRTTB = 2,     /* Blocking smoothed round trip time */
 213         GFS2_LKS_SRTTVARB = 3,  /* Blocking smoothed variance */
 214         GFS2_LKS_SIRT = 4,      /* Smoothed Inter-request time */
 215         GFS2_LKS_SIRTVAR = 5,   /* Smoothed Inter-request variance */
 216         GFS2_LKS_DCOUNT = 6,    /* Count of dlm requests */
 217         GFS2_LKS_QCOUNT = 7,    /* Count of gfs2_holder queues */
 218         GFS2_NR_LKSTATS
 219 };
 220
 221 struct gfs2_lkstats {
 222         s64 stats[GFS2_NR_LKSTATS];
 223 };
 224
 225 enum {
 226         /* States */
 227         HIF_HOLDER              = 6,  /* Set for gh that "holds" the glock */
 228         HIF_FIRST               = 7,
 229         HIF_WAIT                = 10,
 230 };
 231
 232 struct gfs2_holder {
 233         struct list_head gh_list;
 234
 235         struct gfs2_glock *gh_gl;
 236         struct pid *gh_owner_pid;
 237         unsigned int gh_state;
 238         unsigned gh_flags;
 239
 240         int gh_error;
 241         unsigned long gh_iflags; /* HIF_... */
 242         unsigned long gh_ip;
 243 };
 244
 245 enum {
 246         GLF_LOCK                        = 1,
 247         GLF_DEMOTE                      = 3,
 248         GLF_PENDING_DEMOTE              = 4,
 249         GLF_DEMOTE_IN_PROGRESS          = 5,
 250         GLF_DIRTY                       = 6,
 251         GLF_LFLUSH                      = 7,
 252         GLF_INVALIDATE_IN_PROGRESS      = 8,
 253         GLF_REPLY_PENDING               = 9,
 254         GLF_INITIAL                     = 10,
 255         GLF_FROZEN                      = 11,
 256         GLF_QUEUED                      = 12,
 257         GLF_LRU                         = 13,
 258         GLF_OBJECT                      = 14, /* Used only for tracing */
 259         GLF_BLOCKING                    = 15,
 260 };
 261
 262 struct gfs2_glock {
 263         struct hlist_bl_node gl_list;
 264         struct gfs2_sbd *gl_sbd;
 265         unsigned long gl_flags;         /* GLF_... */
 266         struct lm_lockname gl_name;
 267         atomic_t gl_ref;
 268
 269         spinlock_t gl_spin;
 270
 271         /* State fields protected by gl_spin */
 272         unsigned int gl_state:2,        /* Current state */
 273                      gl_target:2,       /* Target state */
 274                      gl_demote_state:2, /* State requested by remote node */
 275                      gl_req:2,          /* State in last dlm request */
 276                      gl_reply:8;        /* Last reply from the dlm */
 277
 278         unsigned int gl_hash;
 279         unsigned long gl_demote_time; /* time of first demote request */
 280         long gl_hold_time;
 281         struct list_head gl_holders;
 282
 283         const struct gfs2_glock_operations *gl_ops;
 284         ktime_t gl_dstamp;
 285         struct gfs2_lkstats gl_stats;
 286         struct dlm_lksb gl_lksb;
 287         char gl_lvb[32];
 288         unsigned long gl_tchange;
 289         void *gl_object;
 290
 291         struct list_head gl_lru;
 292         struct list_head gl_ail_list;
 293         atomic_t gl_ail_count;
 294         atomic_t gl_revokes;
 295         struct delayed_work gl_work;
 296         struct work_struct gl_delete;
 297         struct rcu_head gl_rcu;
 298 };
 299
 300 #define GFS2_MIN_LVB_SIZE 32    /* Min size of LVB that gfs2 supports */
 301
 302 struct gfs2_qadata { /* quota allocation data */
 303         /* Quota stuff */
 304         struct gfs2_quota_data *qa_qd[2*MAXQUOTAS];
 305         struct gfs2_holder qa_qd_ghs[2*MAXQUOTAS];
 306         unsigned int qa_qd_num;
 307 };
 308
 309 struct gfs2_blkreserv {
 310         u32 rs_requested; /* Filled in by caller of gfs2_inplace_reserve() */
 311         struct gfs2_holder rs_rgd_gh; /* Filled in by gfs2_inplace_reserve() */
 312 };
 313
 314 enum {
 315         GIF_INVALID             = 0,
 316         GIF_QD_LOCKED           = 1,
 317         GIF_ALLOC_FAILED        = 2,
 318         GIF_SW_PAGED            = 3,
 319 };
 320
 321
 322 struct gfs2_inode {
 323         struct inode i_inode;
 324         u64 i_no_addr;
 325         u64 i_no_formal_ino;
 326         u64 i_generation;
 327         u64 i_eattr;
 328         unsigned long i_flags;          /* GIF_... */
 329         struct gfs2_glock *i_gl; /* Move into i_gh? */
 330         struct gfs2_holder i_iopen_gh;
 331         struct gfs2_holder i_gh; /* for prepare/commit_write only */
 332         struct gfs2_qadata *i_qadata; /* quota allocation data */
 333         struct gfs2_blkreserv *i_res; /* resource group block reservation */
 334         struct gfs2_rgrpd *i_rgd;
 335         u64 i_goal;     /* goal block for allocations */
 336         struct rw_semaphore i_rw_mutex;
 337         struct list_head i_trunc_list;
 338         __be64 *i_hash_cache;
 339         u32 i_entries;
 340         u32 i_diskflags;
 341         u8 i_height;
 342         u8 i_depth;
 343 };
 344
 345 /*
 346  * Since i_inode is the first element of struct gfs2_inode,
 347  * this is effectively a cast.
 348  */
 349 static inline struct gfs2_inode *GFS2_I(struct inode *inode)
 350 {
 351         return container_of(inode, struct gfs2_inode, i_inode);
 352 }
 353
 354 static inline struct gfs2_sbd *GFS2_SB(const struct inode *inode)
 355 {
 356         return inode->i_sb->s_fs_info;
 357 }
 358
 359 struct gfs2_file {
 360         struct mutex f_fl_mutex;
 361         struct gfs2_holder f_fl_gh;
 362 };
 363
 364 struct gfs2_revoke_replay {
 365         struct list_head rr_list;
 366         u64 rr_blkno;
 367         unsigned int rr_where;
 368 };
 369
 370 enum {
 371         QDF_USER                = 0,
 372         QDF_CHANGE              = 1,
 373         QDF_LOCKED              = 2,
 374         QDF_REFRESH             = 3,
 375 };
 376
 377 struct gfs2_quota_data {
 378         struct list_head qd_list;
 379         struct list_head qd_reclaim;
 380
 381         atomic_t qd_count;
 382
 383         u32 qd_id;
 384         unsigned long qd_flags;         /* QDF_... */
 385
 386         s64 qd_change;
 387         s64 qd_change_sync;
 388
 389         unsigned int qd_slot;
 390         unsigned int qd_slot_count;
 391
 392         struct buffer_head *qd_bh;
 393         struct gfs2_quota_change *qd_bh_qc;
 394         unsigned int qd_bh_count;
 395
 396         struct gfs2_glock *qd_gl;
 397         struct gfs2_quota_lvb qd_qb;
 398
 399         u64 qd_sync_gen;
 400         unsigned long qd_last_warn;
 401 };
 402
 403 struct gfs2_trans {
 404         unsigned long tr_ip;
 405
 406         unsigned int tr_blocks;
 407         unsigned int tr_revokes;
 408         unsigned int tr_reserved;
 409
 410         struct gfs2_holder tr_t_gh;
 411
 412         int tr_touched;
 413
 414         unsigned int tr_num_buf;
 415         unsigned int tr_num_buf_new;
 416         unsigned int tr_num_databuf_new;
 417         unsigned int tr_num_buf_rm;
 418         unsigned int tr_num_databuf_rm;
 419         struct list_head tr_list_buf;
 420
 421         unsigned int tr_num_revoke;
 422         unsigned int tr_num_revoke_rm;
 423 };
 424
 425 struct gfs2_ail {
 426         struct list_head ai_list;
 427
 428         unsigned int ai_first;
 429         struct list_head ai_ail1_list;
 430         struct list_head ai_ail2_list;
 431 };
 432
 433 struct gfs2_journal_extent {
 434         struct list_head extent_list;
 435
 436         unsigned int lblock; /* First logical block */
 437         u64 dblock; /* First disk block */
 438         u64 blocks;
 439 };
 440
 441 struct gfs2_jdesc {
 442         struct list_head jd_list;
 443         struct list_head extent_list;
 444         struct work_struct jd_work;
 445         struct inode *jd_inode;
 446         unsigned long jd_flags;
 447 #define JDF_RECOVERY 1
 448         unsigned int jd_jid;
 449         unsigned int jd_blocks;
 450         int jd_recover_error;
 451 };
 452
 453 struct gfs2_statfs_change_host {
 454         s64 sc_total;
 455         s64 sc_free;
 456         s64 sc_dinodes;
 457 };
 458
 459 #define GFS2_QUOTA_DEFAULT      GFS2_QUOTA_OFF
 460 #define GFS2_QUOTA_OFF          0
 461 #define GFS2_QUOTA_ACCOUNT      1
 462 #define GFS2_QUOTA_ON           2
 463
 464 #define GFS2_DATA_DEFAULT       GFS2_DATA_ORDERED
 465 #define GFS2_DATA_WRITEBACK     1
 466 #define GFS2_DATA_ORDERED       2
 467
 468 #define GFS2_ERRORS_DEFAULT     GFS2_ERRORS_WITHDRAW
 469 #define GFS2_ERRORS_WITHDRAW    0
 470 #define GFS2_ERRORS_CONTINUE    1 /* place holder for future feature */
 471 #define GFS2_ERRORS_RO          2 /* place holder for future feature */
 472 #define GFS2_ERRORS_PANIC       3
 473
 474 struct gfs2_args {
 475         char ar_lockproto[GFS2_LOCKNAME_LEN];   /* Name of the Lock Protocol */
 476         char ar_locktable[GFS2_LOCKNAME_LEN];   /* Name of the Lock Table */
 477         char ar_hostdata[GFS2_LOCKNAME_LEN];    /* Host specific data */
 478         unsigned int ar_spectator:1;            /* Don't get a journal */
 479         unsigned int ar_localflocks:1;          /* Let the VFS do flock|fcntl */
 480         unsigned int ar_debug:1;                /* Oops on errors */
 481         unsigned int ar_posix_acl:1;            /* Enable posix acls */
 482         unsigned int ar_quota:2;                /* off/account/on */
 483         unsigned int ar_suiddir:1;              /* suiddir support */
 484         unsigned int ar_data:2;                 /* ordered/writeback */
 485         unsigned int ar_meta:1;                 /* mount metafs */
 486         unsigned int ar_discard:1;              /* discard requests */
 487         unsigned int ar_errors:2;               /* errors=withdraw | panic */
 488         unsigned int ar_nobarrier:1;            /* do not send barriers */
 489         int ar_commit;                          /* Commit interval */
 490         int ar_statfs_quantum;                  /* The fast statfs interval */
 491         int ar_quota_quantum;                   /* The quota interval */
 492         int ar_statfs_percent;                  /* The % change to force sync */
 493 };
 494
 495 struct gfs2_tune {
 496         spinlock_t gt_spin;
 497
 498         unsigned int gt_logd_secs;
 499
 500         unsigned int gt_quota_simul_sync; /* Max quotavals to sync at once */
 501         unsigned int gt_quota_warn_period; /* Secs between quota warn msgs */
 502         unsigned int gt_quota_scale_num; /* Numerator */
 503         unsigned int gt_quota_scale_den; /* Denominator */
 504         unsigned int gt_quota_quantum; /* Secs between syncs to quota file */
 505         unsigned int gt_new_files_jdata;
 506         unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */
 507         unsigned int gt_complain_secs;
 508         unsigned int gt_statfs_quantum;
 509         unsigned int gt_statfs_slow;
 510 };
 511
 512 enum {
 513         SDF_JOURNAL_CHECKED     = 0,
 514         SDF_JOURNAL_LIVE        = 1,
 515         SDF_SHUTDOWN            = 2,
 516         SDF_NOBARRIERS          = 3,
 517         SDF_NORECOVERY          = 4,
 518         SDF_DEMOTE              = 5,
 519         SDF_NOJOURNALID         = 6,
 520         SDF_RORECOVERY          = 7, /* read only recovery */
 521 };
 522
 523 #define GFS2_FSNAME_LEN         256
 524
 525 struct gfs2_inum_host {
 526         u64 no_formal_ino;
 527         u64 no_addr;
 528 };
 529
 530 struct gfs2_sb_host {
 531         u32 sb_magic;
 532         u32 sb_type;
 533         u32 sb_format;
 534
 535         u32 sb_fs_format;
 536         u32 sb_multihost_format;
 537         u32 sb_bsize;
 538         u32 sb_bsize_shift;
 539
 540         struct gfs2_inum_host sb_master_dir;
 541         struct gfs2_inum_host sb_root_dir;
 542
 543         char sb_lockproto[GFS2_LOCKNAME_LEN];
 544         char sb_locktable[GFS2_LOCKNAME_LEN];
 545 };
 546
 547 /*
 548  * lm_mount() return values
 549  *
 550  * ls_jid - the journal ID this node should use
 551  * ls_first - this node is the first to mount the file system
 552  * ls_lockspace - lock module's context for this file system
 553  * ls_ops - lock module's functions
 554  */
 555
 556 struct lm_lockstruct {
 557         int ls_jid;
 558         unsigned int ls_first;
 559         const struct lm_lockops *ls_ops;
 560         dlm_lockspace_t *ls_dlm;
 561
 562         int ls_recover_jid_done;   /* These two are deprecated, */
 563         int ls_recover_jid_status; /* used previously by gfs_controld */
 564
 565         struct dlm_lksb ls_mounted_lksb; /* mounted_lock */
 566         struct dlm_lksb ls_control_lksb; /* control_lock */
 567         char ls_control_lvb[GDLM_LVB_SIZE]; /* control_lock lvb */
 568         struct completion ls_sync_wait; /* {control,mounted}_{lock,unlock} */
 569
 570         spinlock_t ls_recover_spin; /* protects following fields */
 571         unsigned long ls_recover_flags; /* DFL_ */
 572         uint32_t ls_recover_mount; /* gen in first recover_done cb */
 573         uint32_t ls_recover_start; /* gen in last recover_done cb */
 574         uint32_t ls_recover_block; /* copy recover_start in last recover_prep */
 575         uint32_t ls_recover_size; /* size of recover_submit, recover_result */
 576         uint32_t *ls_recover_submit; /* gen in last recover_slot cb per jid */
 577         uint32_t *ls_recover_result; /* result of last jid recovery */
 578 };
 579
 580 struct gfs2_pcpu_lkstats {
 581         /* One struct for each glock type */
 582         struct gfs2_lkstats lkstats[10];
 583 };
 584
 585 struct gfs2_sbd {
 586         struct super_block *sd_vfs;
 587         struct gfs2_pcpu_lkstats __percpu *sd_lkstats;
 588         struct kobject sd_kobj;
 589         unsigned long sd_flags; /* SDF_... */
 590         struct gfs2_sb_host sd_sb;
 591
 592         /* Constants computed on mount */
 593
 594         u32 sd_fsb2bb;
 595         u32 sd_fsb2bb_shift;
 596         u32 sd_diptrs;  /* Number of pointers in a dinode */
 597         u32 sd_inptrs;  /* Number of pointers in a indirect block */
 598         u32 sd_jbsize;  /* Size of a journaled data block */
 599         u32 sd_hash_bsize;      /* sizeof(exhash block) */
 600         u32 sd_hash_bsize_shift;
 601         u32 sd_hash_ptrs;       /* Number of pointers in a hash block */
 602         u32 sd_qc_per_block;
 603         u32 sd_max_dirres;      /* Max blocks needed to add a directory entry */
 604         u32 sd_max_height;      /* Max height of a file's metadata tree */
 605         u64 sd_heightsize[GFS2_MAX_META_HEIGHT + 1];
 606         u32 sd_max_jheight; /* Max height of journaled file's meta tree */
 607         u64 sd_jheightsize[GFS2_MAX_META_HEIGHT + 1];
 608
 609         struct gfs2_args sd_args;       /* Mount arguments */
 610         struct gfs2_tune sd_tune;       /* Filesystem tuning structure */
 611
 612         /* Lock Stuff */
 613
 614         struct lm_lockstruct sd_lockstruct;
 615         struct gfs2_holder sd_live_gh;
 616         struct gfs2_glock *sd_rename_gl;
 617         struct gfs2_glock *sd_trans_gl;
 618         wait_queue_head_t sd_glock_wait;
 619         atomic_t sd_glock_disposal;
 620         struct completion sd_locking_init;
 621         struct delayed_work sd_control_work;
 622
 623         /* Inode Stuff */
 624
 625         struct dentry *sd_master_dir;
 626         struct dentry *sd_root_dir;
 627
 628         struct inode *sd_jindex;
 629         struct inode *sd_statfs_inode;
 630         struct inode *sd_sc_inode;
 631         struct inode *sd_qc_inode;
 632         struct inode *sd_rindex;
 633         struct inode *sd_quota_inode;
 634
 635         /* StatFS stuff */
 636
 637         spinlock_t sd_statfs_spin;
 638         struct gfs2_statfs_change_host sd_statfs_master;
 639         struct gfs2_statfs_change_host sd_statfs_local;
 640         int sd_statfs_force_sync;
 641
 642         /* Resource group stuff */
 643
 644         int sd_rindex_uptodate;
 645         spinlock_t sd_rindex_spin;
 646         struct rb_root sd_rindex_tree;
 647         unsigned int sd_rgrps;
 648         unsigned int sd_max_rg_data;
 649
 650         /* Journal index stuff */
 651
 652         struct list_head sd_jindex_list;
 653         spinlock_t sd_jindex_spin;
 654         struct mutex sd_jindex_mutex;
 655         unsigned int sd_journals;
 656
 657         struct gfs2_jdesc *sd_jdesc;
 658         struct gfs2_holder sd_journal_gh;
 659         struct gfs2_holder sd_jinode_gh;
 660
 661         struct gfs2_holder sd_sc_gh;
 662         struct gfs2_holder sd_qc_gh;
 663
 664         /* Daemon stuff */
 665
 666         struct task_struct *sd_logd_process;
 667         struct task_struct *sd_quotad_process;
 668
 669         /* Quota stuff */
 670
 671         struct list_head sd_quota_list;
 672         atomic_t sd_quota_count;
 673         struct mutex sd_quota_mutex;
 674         wait_queue_head_t sd_quota_wait;
 675         struct list_head sd_trunc_list;
 676         spinlock_t sd_trunc_lock;
 677
 678         unsigned int sd_quota_slots;
 679         unsigned int sd_quota_chunks;
 680         unsigned char **sd_quota_bitmap;
 681
 682         u64 sd_quota_sync_gen;
 683
 684         /* Log stuff */
 685
 686         spinlock_t sd_log_lock;
 687
 688         unsigned int sd_log_blks_reserved;
 689         unsigned int sd_log_commited_buf;
 690         unsigned int sd_log_commited_databuf;
 691         int sd_log_commited_revoke;
 692
 693         atomic_t sd_log_pinned;
 694         unsigned int sd_log_num_buf;
 695         unsigned int sd_log_num_revoke;
 696         unsigned int sd_log_num_rg;
 697         unsigned int sd_log_num_databuf;
 698
 699         struct list_head sd_log_le_buf;
 700         struct list_head sd_log_le_revoke;
 701         struct list_head sd_log_le_rg;
 702         struct list_head sd_log_le_databuf;
 703         struct list_head sd_log_le_ordered;
 704
 705         atomic_t sd_log_thresh1;
 706         atomic_t sd_log_thresh2;
 707         atomic_t sd_log_blks_free;
 708         wait_queue_head_t sd_log_waitq;
 709         wait_queue_head_t sd_logd_waitq;
 710
 711         u64 sd_log_sequence;
 712         unsigned int sd_log_head;
 713         unsigned int sd_log_tail;
 714         int sd_log_idle;
 715
 716         struct rw_semaphore sd_log_flush_lock;
 717         atomic_t sd_log_in_flight;
 718         wait_queue_head_t sd_log_flush_wait;
 719
 720         unsigned int sd_log_flush_head;
 721         u64 sd_log_flush_wrapped;
 722
 723         spinlock_t sd_ail_lock;
 724         struct list_head sd_ail1_list;
 725         struct list_head sd_ail2_list;
 726
 727         /* Replay stuff */
 728
 729         struct list_head sd_revoke_list;
 730         unsigned int sd_replay_tail;
 731
 732         unsigned int sd_found_blocks;
 733         unsigned int sd_found_revokes;
 734         unsigned int sd_replayed_blocks;
 735
 736         /* For quiescing the filesystem */
 737
 738         struct gfs2_holder sd_freeze_gh;
 739         struct mutex sd_freeze_lock;
 740         unsigned int sd_freeze_count;
 741
 742         char sd_fsname[GFS2_FSNAME_LEN];
 743         char sd_table_name[GFS2_FSNAME_LEN];
 744         char sd_proto_name[GFS2_FSNAME_LEN];
 745
 746         /* Debugging crud */
 747
 748         unsigned long sd_last_warning;
 749         struct dentry *debugfs_dir;    /* debugfs directory */
 750         struct dentry *debugfs_dentry_glocks;
 751         struct dentry *debugfs_dentry_glstats;
 752         struct dentry *debugfs_dentry_sbstats;
 753 };
 754
 755 static inline void gfs2_glstats_inc(struct gfs2_glock *gl, int which)
 756 {
 757         gl->gl_stats.stats[which]++;
 758 }
 759
 760 static inline void gfs2_sbstats_inc(const struct gfs2_glock *gl, int which)
 761 {
 762         const struct gfs2_sbd *sdp = gl->gl_sbd;
 763         preempt_disable();
 764         this_cpu_ptr(sdp->sd_lkstats)->lkstats[gl->gl_name.ln_type].stats[which]++;
 765         preempt_enable();
 766 }
 767
 768 #endif /* __INCORE_DOT_H__ */
 769