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_bufdata;
  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_bufdata *bd);
  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 #define GBF_FULL 1
  68
  69 struct gfs2_bitmap {
  70         struct buffer_head *bi_bh;
  71         char *bi_clone;
  72         unsigned long bi_flags;
  73         u32 bi_offset;
  74         u32 bi_start;
  75         u32 bi_len;
  76 };
  77
  78 struct gfs2_rgrpd {
  79         struct rb_node rd_node;         /* Link with superblock */
  80         struct gfs2_glock *rd_gl;       /* Glock for this rgrp */
  81         u64 rd_addr;                    /* grp block disk address */
  82         u64 rd_data0;                   /* first data location */
  83         u32 rd_length;                  /* length of rgrp header in fs blocks */
  84         u32 rd_data;                    /* num of data blocks in rgrp */
  85         u32 rd_bitbytes;                /* number of bytes in data bitmaps */
  86         u32 rd_free;
  87         u32 rd_free_clone;
  88         u32 rd_dinodes;
  89         u64 rd_igeneration;
  90         struct gfs2_bitmap *rd_bits;
  91         struct gfs2_sbd *rd_sbd;
  92         u32 rd_last_alloc;
  93         u32 rd_flags;
  94 #define GFS2_RDF_CHECK          0x10000000 /* check for unlinked inodes */
  95 #define GFS2_RDF_UPTODATE       0x20000000 /* rg is up to date */
  96 #define GFS2_RDF_ERROR          0x40000000 /* error in rg */
  97 #define GFS2_RDF_MASK           0xf0000000 /* mask for internal flags */
  98 };
  99
 100 enum gfs2_state_bits {
 101         BH_Pinned = BH_PrivateStart,
 102         BH_Escaped = BH_PrivateStart + 1,
 103         BH_Zeronew = BH_PrivateStart + 2,
 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 BUFFER_FNS(Zeronew, zeronew)
 111 TAS_BUFFER_FNS(Zeronew, zeronew)
 112
 113 struct gfs2_bufdata {
 114         struct buffer_head *bd_bh;
 115         struct gfs2_glock *bd_gl;
 116         u64 bd_blkno;
 117
 118         struct list_head bd_list;
 119         const struct gfs2_log_operations *bd_ops;
 120
 121         struct gfs2_ail *bd_ail;
 122         struct list_head bd_ail_st_list;
 123         struct list_head bd_ail_gl_list;
 124 };
 125
 126 /*
 127  * Internally, we prefix things with gdlm_ and GDLM_ (for gfs-dlm) since a
 128  * prefix of lock_dlm_ gets awkward.
 129  */
 130
 131 #define GDLM_STRNAME_BYTES      25
 132 #define GDLM_LVB_SIZE           32
 133
 134 /*
 135  * ls_recover_flags:
 136  *
 137  * DFL_BLOCK_LOCKS: dlm is in recovery and will grant locks that had been
 138  * held by failed nodes whose journals need recovery.  Those locks should
 139  * only be used for journal recovery until the journal recovery is done.
 140  * This is set by the dlm recover_prep callback and cleared by the
 141  * gfs2_control thread when journal recovery is complete.  To avoid
 142  * races between recover_prep setting and gfs2_control clearing, recover_spin
 143  * is held while changing this bit and reading/writing recover_block
 144  * and recover_start.
 145  *
 146  * DFL_NO_DLM_OPS: dlm lockspace ops/callbacks are not being used.
 147  *
 148  * DFL_FIRST_MOUNT: this node is the first to mount this fs and is doing
 149  * recovery of all journals before allowing other nodes to mount the fs.
 150  * This is cleared when FIRST_MOUNT_DONE is set.
 151  *
 152  * DFL_FIRST_MOUNT_DONE: this node was the first mounter, and has finished
 153  * recovery of all journals, and now allows other nodes to mount the fs.
 154  *
 155  * DFL_MOUNT_DONE: gdlm_mount has completed successfully and cleared
 156  * BLOCK_LOCKS for the first time.  The gfs2_control thread should now
 157  * control clearing BLOCK_LOCKS for further recoveries.
 158  *
 159  * DFL_UNMOUNT: gdlm_unmount sets to keep sdp off gfs2_control_wq.
 160  *
 161  * DFL_DLM_RECOVERY: set while dlm is in recovery, between recover_prep()
 162  * and recover_done(), i.e. set while recover_block == recover_start.
 163  */
 164
 165 enum {
 166         DFL_BLOCK_LOCKS         = 0,
 167         DFL_NO_DLM_OPS          = 1,
 168         DFL_FIRST_MOUNT         = 2,
 169         DFL_FIRST_MOUNT_DONE    = 3,
 170         DFL_MOUNT_DONE          = 4,
 171         DFL_UNMOUNT             = 5,
 172         DFL_DLM_RECOVERY        = 6,
 173 };
 174
 175 struct lm_lockname {
 176         u64 ln_number;
 177         unsigned int ln_type;
 178 };
 179
 180 #define lm_name_equal(name1, name2) \
 181         (((name1)->ln_number == (name2)->ln_number) && \
 182          ((name1)->ln_type == (name2)->ln_type))
 183
 184
 185 struct gfs2_glock_operations {
 186         void (*go_xmote_th) (struct gfs2_glock *gl);
 187         int (*go_xmote_bh) (struct gfs2_glock *gl, struct gfs2_holder *gh);
 188         void (*go_inval) (struct gfs2_glock *gl, int flags);
 189         int (*go_demote_ok) (const struct gfs2_glock *gl);
 190         int (*go_lock) (struct gfs2_holder *gh);
 191         void (*go_unlock) (struct gfs2_holder *gh);
 192         int (*go_dump)(struct seq_file *seq, const struct gfs2_glock *gl);
 193         void (*go_callback) (struct gfs2_glock *gl);
 194         const int go_type;
 195         const unsigned long go_flags;
 196 #define GLOF_ASPACE 1
 197 };
 198
 199 enum {
 200         GFS2_LKS_SRTT = 0,      /* Non blocking smoothed round trip time */
 201         GFS2_LKS_SRTTVAR = 1,   /* Non blocking smoothed variance */
 202         GFS2_LKS_SRTTB = 2,     /* Blocking smoothed round trip time */
 203         GFS2_LKS_SRTTVARB = 3,  /* Blocking smoothed variance */
 204         GFS2_LKS_SIRT = 4,      /* Smoothed Inter-request time */
 205         GFS2_LKS_SIRTVAR = 5,   /* Smoothed Inter-request variance */
 206         GFS2_LKS_DCOUNT = 6,    /* Count of dlm requests */
 207         GFS2_LKS_QCOUNT = 7,    /* Count of gfs2_holder queues */
 208         GFS2_NR_LKSTATS
 209 };
 210
 211 struct gfs2_lkstats {
 212         s64 stats[GFS2_NR_LKSTATS];
 213 };
 214
 215 enum {
 216         /* States */
 217         HIF_HOLDER              = 6,  /* Set for gh that "holds" the glock */
 218         HIF_FIRST               = 7,
 219         HIF_WAIT                = 10,
 220 };
 221
 222 struct gfs2_holder {
 223         struct list_head gh_list;
 224
 225         struct gfs2_glock *gh_gl;
 226         struct pid *gh_owner_pid;
 227         unsigned int gh_state;
 228         unsigned gh_flags;
 229
 230         int gh_error;
 231         unsigned long gh_iflags; /* HIF_... */
 232         unsigned long gh_ip;
 233 };
 234
 235 enum {
 236         GLF_LOCK                        = 1,
 237         GLF_DEMOTE                      = 3,
 238         GLF_PENDING_DEMOTE              = 4,
 239         GLF_DEMOTE_IN_PROGRESS          = 5,
 240         GLF_DIRTY                       = 6,
 241         GLF_LFLUSH                      = 7,
 242         GLF_INVALIDATE_IN_PROGRESS      = 8,
 243         GLF_REPLY_PENDING               = 9,
 244         GLF_INITIAL                     = 10,
 245         GLF_FROZEN                      = 11,
 246         GLF_QUEUED                      = 12,
 247         GLF_LRU                         = 13,
 248         GLF_OBJECT                      = 14, /* Used only for tracing */
 249         GLF_BLOCKING                    = 15,
 250 };
 251
 252 struct gfs2_glock {
 253         struct hlist_bl_node gl_list;
 254         struct gfs2_sbd *gl_sbd;
 255         unsigned long gl_flags;         /* GLF_... */
 256         struct lm_lockname gl_name;
 257         atomic_t gl_ref;
 258
 259         spinlock_t gl_spin;
 260
 261         /* State fields protected by gl_spin */
 262         unsigned int gl_state:2,        /* Current state */
 263                      gl_target:2,       /* Target state */
 264                      gl_demote_state:2, /* State requested by remote node */
 265                      gl_req:2,          /* State in last dlm request */
 266                      gl_reply:8;        /* Last reply from the dlm */
 267
 268         unsigned int gl_hash;
 269         unsigned long gl_demote_time; /* time of first demote request */
 270         long gl_hold_time;
 271         struct list_head gl_holders;
 272
 273         const struct gfs2_glock_operations *gl_ops;
 274         ktime_t gl_dstamp;
 275         struct gfs2_lkstats gl_stats;
 276         struct dlm_lksb gl_lksb;
 277         char gl_lvb[32];
 278         unsigned long gl_tchange;
 279         void *gl_object;
 280
 281         struct list_head gl_lru;
 282         struct list_head gl_ail_list;
 283         atomic_t gl_ail_count;
 284         atomic_t gl_revokes;
 285         struct delayed_work gl_work;
 286         struct work_struct gl_delete;
 287         struct rcu_head gl_rcu;
 288 };
 289
 290 #define GFS2_MIN_LVB_SIZE 32    /* Min size of LVB that gfs2 supports */
 291
 292 struct gfs2_qadata { /* quota allocation data */
 293         /* Quota stuff */
 294         struct gfs2_quota_data *qa_qd[2*MAXQUOTAS];
 295         struct gfs2_holder qa_qd_ghs[2*MAXQUOTAS];
 296         unsigned int qa_qd_num;
 297 };
 298
 299 struct gfs2_blkreserv {
 300         u32 rs_requested; /* Filled in by caller of gfs2_inplace_reserve() */
 301         struct gfs2_holder rs_rgd_gh; /* Filled in by gfs2_inplace_reserve() */
 302 };
 303
 304 enum {
 305         GIF_INVALID             = 0,
 306         GIF_QD_LOCKED           = 1,
 307         GIF_ALLOC_FAILED        = 2,
 308         GIF_SW_PAGED            = 3,
 309 };
 310
 311
 312 struct gfs2_inode {
 313         struct inode i_inode;
 314         u64 i_no_addr;
 315         u64 i_no_formal_ino;
 316         u64 i_generation;
 317         u64 i_eattr;
 318         unsigned long i_flags;          /* GIF_... */
 319         struct gfs2_glock *i_gl; /* Move into i_gh? */
 320         struct gfs2_holder i_iopen_gh;
 321         struct gfs2_holder i_gh; /* for prepare/commit_write only */
 322         struct gfs2_qadata *i_qadata; /* quota allocation data */
 323         struct gfs2_blkreserv *i_res; /* resource group block reservation */
 324         struct gfs2_rgrpd *i_rgd;
 325         u64 i_goal;     /* goal block for allocations */
 326         struct rw_semaphore i_rw_mutex;
 327         struct list_head i_trunc_list;
 328         __be64 *i_hash_cache;
 329         u32 i_entries;
 330         u32 i_diskflags;
 331         u8 i_height;
 332         u8 i_depth;
 333 };
 334
 335 /*
 336  * Since i_inode is the first element of struct gfs2_inode,
 337  * this is effectively a cast.
 338  */
 339 static inline struct gfs2_inode *GFS2_I(struct inode *inode)
 340 {
 341         return container_of(inode, struct gfs2_inode, i_inode);
 342 }
 343
 344 static inline struct gfs2_sbd *GFS2_SB(const struct inode *inode)
 345 {
 346         return inode->i_sb->s_fs_info;
 347 }
 348
 349 struct gfs2_file {
 350         struct mutex f_fl_mutex;
 351         struct gfs2_holder f_fl_gh;
 352 };
 353
 354 struct gfs2_revoke_replay {
 355         struct list_head rr_list;
 356         u64 rr_blkno;
 357         unsigned int rr_where;
 358 };
 359
 360 enum {
 361         QDF_USER                = 0,
 362         QDF_CHANGE              = 1,
 363         QDF_LOCKED              = 2,
 364         QDF_REFRESH             = 3,
 365 };
 366
 367 struct gfs2_quota_data {
 368         struct list_head qd_list;
 369         struct list_head qd_reclaim;
 370
 371         atomic_t qd_count;
 372
 373         u32 qd_id;
 374         unsigned long qd_flags;         /* QDF_... */
 375
 376         s64 qd_change;
 377         s64 qd_change_sync;
 378
 379         unsigned int qd_slot;
 380         unsigned int qd_slot_count;
 381
 382         struct buffer_head *qd_bh;
 383         struct gfs2_quota_change *qd_bh_qc;
 384         unsigned int qd_bh_count;
 385
 386         struct gfs2_glock *qd_gl;
 387         struct gfs2_quota_lvb qd_qb;
 388
 389         u64 qd_sync_gen;
 390         unsigned long qd_last_warn;
 391 };
 392
 393 struct gfs2_trans {
 394         unsigned long tr_ip;
 395
 396         unsigned int tr_blocks;
 397         unsigned int tr_revokes;
 398         unsigned int tr_reserved;
 399
 400         struct gfs2_holder tr_t_gh;
 401
 402         int tr_touched;
 403
 404         unsigned int tr_num_buf_new;
 405         unsigned int tr_num_databuf_new;
 406         unsigned int tr_num_buf_rm;
 407         unsigned int tr_num_databuf_rm;
 408         unsigned int tr_num_revoke;
 409         unsigned int tr_num_revoke_rm;
 410 };
 411
 412 struct gfs2_ail {
 413         struct list_head ai_list;
 414
 415         unsigned int ai_first;
 416         struct list_head ai_ail1_list;
 417         struct list_head ai_ail2_list;
 418 };
 419
 420 struct gfs2_journal_extent {
 421         struct list_head extent_list;
 422
 423         unsigned int lblock; /* First logical block */
 424         u64 dblock; /* First disk block */
 425         u64 blocks;
 426 };
 427
 428 struct gfs2_jdesc {
 429         struct list_head jd_list;
 430         struct list_head extent_list;
 431         struct work_struct jd_work;
 432         struct inode *jd_inode;
 433         unsigned long jd_flags;
 434 #define JDF_RECOVERY 1
 435         unsigned int jd_jid;
 436         unsigned int jd_blocks;
 437         int jd_recover_error;
 438 };
 439
 440 struct gfs2_statfs_change_host {
 441         s64 sc_total;
 442         s64 sc_free;
 443         s64 sc_dinodes;
 444 };
 445
 446 #define GFS2_QUOTA_DEFAULT      GFS2_QUOTA_OFF
 447 #define GFS2_QUOTA_OFF          0
 448 #define GFS2_QUOTA_ACCOUNT      1
 449 #define GFS2_QUOTA_ON           2
 450
 451 #define GFS2_DATA_DEFAULT       GFS2_DATA_ORDERED
 452 #define GFS2_DATA_WRITEBACK     1
 453 #define GFS2_DATA_ORDERED       2
 454
 455 #define GFS2_ERRORS_DEFAULT     GFS2_ERRORS_WITHDRAW
 456 #define GFS2_ERRORS_WITHDRAW    0
 457 #define GFS2_ERRORS_CONTINUE    1 /* place holder for future feature */
 458 #define GFS2_ERRORS_RO          2 /* place holder for future feature */
 459 #define GFS2_ERRORS_PANIC       3
 460
 461 struct gfs2_args {
 462         char ar_lockproto[GFS2_LOCKNAME_LEN];   /* Name of the Lock Protocol */
 463         char ar_locktable[GFS2_LOCKNAME_LEN];   /* Name of the Lock Table */
 464         char ar_hostdata[GFS2_LOCKNAME_LEN];    /* Host specific data */
 465         unsigned int ar_spectator:1;            /* Don't get a journal */
 466         unsigned int ar_localflocks:1;          /* Let the VFS do flock|fcntl */
 467         unsigned int ar_debug:1;                /* Oops on errors */
 468         unsigned int ar_posix_acl:1;            /* Enable posix acls */
 469         unsigned int ar_quota:2;                /* off/account/on */
 470         unsigned int ar_suiddir:1;              /* suiddir support */
 471         unsigned int ar_data:2;                 /* ordered/writeback */
 472         unsigned int ar_meta:1;                 /* mount metafs */
 473         unsigned int ar_discard:1;              /* discard requests */
 474         unsigned int ar_errors:2;               /* errors=withdraw | panic */
 475         unsigned int ar_nobarrier:1;            /* do not send barriers */
 476         int ar_commit;                          /* Commit interval */
 477         int ar_statfs_quantum;                  /* The fast statfs interval */
 478         int ar_quota_quantum;                   /* The quota interval */
 479         int ar_statfs_percent;                  /* The % change to force sync */
 480 };
 481
 482 struct gfs2_tune {
 483         spinlock_t gt_spin;
 484
 485         unsigned int gt_logd_secs;
 486
 487         unsigned int gt_quota_simul_sync; /* Max quotavals to sync at once */
 488         unsigned int gt_quota_warn_period; /* Secs between quota warn msgs */
 489         unsigned int gt_quota_scale_num; /* Numerator */
 490         unsigned int gt_quota_scale_den; /* Denominator */
 491         unsigned int gt_quota_quantum; /* Secs between syncs to quota file */
 492         unsigned int gt_new_files_jdata;
 493         unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */
 494         unsigned int gt_complain_secs;
 495         unsigned int gt_statfs_quantum;
 496         unsigned int gt_statfs_slow;
 497 };
 498
 499 enum {
 500         SDF_JOURNAL_CHECKED     = 0,
 501         SDF_JOURNAL_LIVE        = 1,
 502         SDF_SHUTDOWN            = 2,
 503         SDF_NOBARRIERS          = 3,
 504         SDF_NORECOVERY          = 4,
 505         SDF_DEMOTE              = 5,
 506         SDF_NOJOURNALID         = 6,
 507         SDF_RORECOVERY          = 7, /* read only recovery */
 508 };
 509
 510 #define GFS2_FSNAME_LEN         256
 511
 512 struct gfs2_inum_host {
 513         u64 no_formal_ino;
 514         u64 no_addr;
 515 };
 516
 517 struct gfs2_sb_host {
 518         u32 sb_magic;
 519         u32 sb_type;
 520         u32 sb_format;
 521
 522         u32 sb_fs_format;
 523         u32 sb_multihost_format;
 524         u32 sb_bsize;
 525         u32 sb_bsize_shift;
 526
 527         struct gfs2_inum_host sb_master_dir;
 528         struct gfs2_inum_host sb_root_dir;
 529
 530         char sb_lockproto[GFS2_LOCKNAME_LEN];
 531         char sb_locktable[GFS2_LOCKNAME_LEN];
 532 };
 533
 534 /*
 535  * lm_mount() return values
 536  *
 537  * ls_jid - the journal ID this node should use
 538  * ls_first - this node is the first to mount the file system
 539  * ls_lockspace - lock module's context for this file system
 540  * ls_ops - lock module's functions
 541  */
 542
 543 struct lm_lockstruct {
 544         int ls_jid;
 545         unsigned int ls_first;
 546         const struct lm_lockops *ls_ops;
 547         dlm_lockspace_t *ls_dlm;
 548
 549         int ls_recover_jid_done;   /* These two are deprecated, */
 550         int ls_recover_jid_status; /* used previously by gfs_controld */
 551
 552         struct dlm_lksb ls_mounted_lksb; /* mounted_lock */
 553         struct dlm_lksb ls_control_lksb; /* control_lock */
 554         char ls_control_lvb[GDLM_LVB_SIZE]; /* control_lock lvb */
 555         struct completion ls_sync_wait; /* {control,mounted}_{lock,unlock} */
 556
 557         spinlock_t ls_recover_spin; /* protects following fields */
 558         unsigned long ls_recover_flags; /* DFL_ */
 559         uint32_t ls_recover_mount; /* gen in first recover_done cb */
 560         uint32_t ls_recover_start; /* gen in last recover_done cb */
 561         uint32_t ls_recover_block; /* copy recover_start in last recover_prep */
 562         uint32_t ls_recover_size; /* size of recover_submit, recover_result */
 563         uint32_t *ls_recover_submit; /* gen in last recover_slot cb per jid */
 564         uint32_t *ls_recover_result; /* result of last jid recovery */
 565 };
 566
 567 struct gfs2_pcpu_lkstats {
 568         /* One struct for each glock type */
 569         struct gfs2_lkstats lkstats[10];
 570 };
 571
 572 struct gfs2_sbd {
 573         struct super_block *sd_vfs;
 574         struct gfs2_pcpu_lkstats __percpu *sd_lkstats;
 575         struct kobject sd_kobj;
 576         unsigned long sd_flags; /* SDF_... */
 577         struct gfs2_sb_host sd_sb;
 578
 579         /* Constants computed on mount */
 580
 581         u32 sd_fsb2bb;
 582         u32 sd_fsb2bb_shift;
 583         u32 sd_diptrs;  /* Number of pointers in a dinode */
 584         u32 sd_inptrs;  /* Number of pointers in a indirect block */
 585         u32 sd_jbsize;  /* Size of a journaled data block */
 586         u32 sd_hash_bsize;      /* sizeof(exhash block) */
 587         u32 sd_hash_bsize_shift;
 588         u32 sd_hash_ptrs;       /* Number of pointers in a hash block */
 589         u32 sd_qc_per_block;
 590         u32 sd_max_dirres;      /* Max blocks needed to add a directory entry */
 591         u32 sd_max_height;      /* Max height of a file's metadata tree */
 592         u64 sd_heightsize[GFS2_MAX_META_HEIGHT + 1];
 593         u32 sd_max_jheight; /* Max height of journaled file's meta tree */
 594         u64 sd_jheightsize[GFS2_MAX_META_HEIGHT + 1];
 595
 596         struct gfs2_args sd_args;       /* Mount arguments */
 597         struct gfs2_tune sd_tune;       /* Filesystem tuning structure */
 598
 599         /* Lock Stuff */
 600
 601         struct lm_lockstruct sd_lockstruct;
 602         struct gfs2_holder sd_live_gh;
 603         struct gfs2_glock *sd_rename_gl;
 604         struct gfs2_glock *sd_trans_gl;
 605         wait_queue_head_t sd_glock_wait;
 606         atomic_t sd_glock_disposal;
 607         struct completion sd_locking_init;
 608         struct delayed_work sd_control_work;
 609
 610         /* Inode Stuff */
 611
 612         struct dentry *sd_master_dir;
 613         struct dentry *sd_root_dir;
 614
 615         struct inode *sd_jindex;
 616         struct inode *sd_statfs_inode;
 617         struct inode *sd_sc_inode;
 618         struct inode *sd_qc_inode;
 619         struct inode *sd_rindex;
 620         struct inode *sd_quota_inode;
 621
 622         /* StatFS stuff */
 623
 624         spinlock_t sd_statfs_spin;
 625         struct gfs2_statfs_change_host sd_statfs_master;
 626         struct gfs2_statfs_change_host sd_statfs_local;
 627         int sd_statfs_force_sync;
 628
 629         /* Resource group stuff */
 630
 631         int sd_rindex_uptodate;
 632         spinlock_t sd_rindex_spin;
 633         struct rb_root sd_rindex_tree;
 634         unsigned int sd_rgrps;
 635         unsigned int sd_max_rg_data;
 636
 637         /* Journal index stuff */
 638
 639         struct list_head sd_jindex_list;
 640         spinlock_t sd_jindex_spin;
 641         struct mutex sd_jindex_mutex;
 642         unsigned int sd_journals;
 643
 644         struct gfs2_jdesc *sd_jdesc;
 645         struct gfs2_holder sd_journal_gh;
 646         struct gfs2_holder sd_jinode_gh;
 647
 648         struct gfs2_holder sd_sc_gh;
 649         struct gfs2_holder sd_qc_gh;
 650
 651         /* Daemon stuff */
 652
 653         struct task_struct *sd_logd_process;
 654         struct task_struct *sd_quotad_process;
 655
 656         /* Quota stuff */
 657
 658         struct list_head sd_quota_list;
 659         atomic_t sd_quota_count;
 660         struct mutex sd_quota_mutex;
 661         wait_queue_head_t sd_quota_wait;
 662         struct list_head sd_trunc_list;
 663         spinlock_t sd_trunc_lock;
 664
 665         unsigned int sd_quota_slots;
 666         unsigned int sd_quota_chunks;
 667         unsigned char **sd_quota_bitmap;
 668
 669         u64 sd_quota_sync_gen;
 670
 671         /* Log stuff */
 672
 673         spinlock_t sd_log_lock;
 674
 675         unsigned int sd_log_blks_reserved;
 676         unsigned int sd_log_commited_buf;
 677         unsigned int sd_log_commited_databuf;
 678         int sd_log_commited_revoke;
 679
 680         atomic_t sd_log_pinned;
 681         unsigned int sd_log_num_buf;
 682         unsigned int sd_log_num_revoke;
 683         unsigned int sd_log_num_rg;
 684         unsigned int sd_log_num_databuf;
 685
 686         struct list_head sd_log_le_buf;
 687         struct list_head sd_log_le_revoke;
 688         struct list_head sd_log_le_databuf;
 689         struct list_head sd_log_le_ordered;
 690
 691         atomic_t sd_log_thresh1;
 692         atomic_t sd_log_thresh2;
 693         atomic_t sd_log_blks_free;
 694         wait_queue_head_t sd_log_waitq;
 695         wait_queue_head_t sd_logd_waitq;
 696
 697         u64 sd_log_sequence;
 698         unsigned int sd_log_head;
 699         unsigned int sd_log_tail;
 700         int sd_log_idle;
 701
 702         struct rw_semaphore sd_log_flush_lock;
 703         atomic_t sd_log_in_flight;
 704         struct bio *sd_log_bio;
 705         wait_queue_head_t sd_log_flush_wait;
 706         int sd_log_error;
 707
 708         unsigned int sd_log_flush_head;
 709         u64 sd_log_flush_wrapped;
 710
 711         spinlock_t sd_ail_lock;
 712         struct list_head sd_ail1_list;
 713         struct list_head sd_ail2_list;
 714
 715         /* Replay stuff */
 716
 717         struct list_head sd_revoke_list;
 718         unsigned int sd_replay_tail;
 719
 720         unsigned int sd_found_blocks;
 721         unsigned int sd_found_revokes;
 722         unsigned int sd_replayed_blocks;
 723
 724         /* For quiescing the filesystem */
 725
 726         struct gfs2_holder sd_freeze_gh;
 727         struct mutex sd_freeze_lock;
 728         unsigned int sd_freeze_count;
 729
 730         char sd_fsname[GFS2_FSNAME_LEN];
 731         char sd_table_name[GFS2_FSNAME_LEN];
 732         char sd_proto_name[GFS2_FSNAME_LEN];
 733
 734         /* Debugging crud */
 735
 736         unsigned long sd_last_warning;
 737         struct dentry *debugfs_dir;    /* debugfs directory */
 738         struct dentry *debugfs_dentry_glocks;
 739         struct dentry *debugfs_dentry_glstats;
 740         struct dentry *debugfs_dentry_sbstats;
 741 };
 742
 743 static inline void gfs2_glstats_inc(struct gfs2_glock *gl, int which)
 744 {
 745         gl->gl_stats.stats[which]++;
 746 }
 747
 748 static inline void gfs2_sbstats_inc(const struct gfs2_glock *gl, int which)
 749 {
 750         const struct gfs2_sbd *sdp = gl->gl_sbd;
 751         preempt_disable();
 752         this_cpu_ptr(sdp->sd_lkstats)->lkstats[gl->gl_name.ln_type].stats[which]++;
 753         preempt_enable();
 754 }
 755
 756 #endif /* __INCORE_DOT_H__ */
 757