linux/fs/gfs2/incore.h
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   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
  28struct gfs2_log_operations;
  29struct gfs2_bufdata;
  30struct gfs2_holder;
  31struct gfs2_glock;
  32struct gfs2_quota_data;
  33struct gfs2_trans;
  34struct gfs2_ail;
  35struct gfs2_jdesc;
  36struct gfs2_sbd;
  37struct lm_lockops;
  38
  39typedef void (*gfs2_glop_bh_t) (struct gfs2_glock *gl, unsigned int ret);
  40
  41struct 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
  54struct 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
  69struct 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
  78struct 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_reserved;                /* number of blocks reserved */
  88        u32 rd_free_clone;
  89        u32 rd_dinodes;
  90        u64 rd_igeneration;
  91        struct gfs2_bitmap *rd_bits;
  92        struct gfs2_sbd *rd_sbd;
  93        struct gfs2_rgrp_lvb *rd_rgl;
  94        u32 rd_last_alloc;
  95        u32 rd_flags;
  96#define GFS2_RDF_CHECK          0x10000000 /* check for unlinked inodes */
  97#define GFS2_RDF_UPTODATE       0x20000000 /* rg is up to date */
  98#define GFS2_RDF_ERROR          0x40000000 /* error in rg */
  99#define GFS2_RDF_MASK           0xf0000000 /* mask for internal flags */
 100        spinlock_t rd_rsspin;           /* protects reservation related vars */
 101        struct rb_root rd_rstree;       /* multi-block reservation tree */
 102};
 103
 104struct gfs2_rbm {
 105        struct gfs2_rgrpd *rgd;
 106        struct gfs2_bitmap *bi; /* Bitmap must belong to the rgd */
 107        u32 offset;             /* The offset is bitmap relative */
 108};
 109
 110static inline u64 gfs2_rbm_to_block(const struct gfs2_rbm *rbm)
 111{
 112        return rbm->rgd->rd_data0 + (rbm->bi->bi_start * GFS2_NBBY) + rbm->offset;
 113}
 114
 115static inline bool gfs2_rbm_eq(const struct gfs2_rbm *rbm1,
 116                               const struct gfs2_rbm *rbm2)
 117{
 118        return (rbm1->rgd == rbm2->rgd) && (rbm1->bi == rbm2->bi) && 
 119               (rbm1->offset == rbm2->offset);
 120}
 121
 122enum gfs2_state_bits {
 123        BH_Pinned = BH_PrivateStart,
 124        BH_Escaped = BH_PrivateStart + 1,
 125        BH_Zeronew = BH_PrivateStart + 2,
 126};
 127
 128BUFFER_FNS(Pinned, pinned)
 129TAS_BUFFER_FNS(Pinned, pinned)
 130BUFFER_FNS(Escaped, escaped)
 131TAS_BUFFER_FNS(Escaped, escaped)
 132BUFFER_FNS(Zeronew, zeronew)
 133TAS_BUFFER_FNS(Zeronew, zeronew)
 134
 135struct gfs2_bufdata {
 136        struct buffer_head *bd_bh;
 137        struct gfs2_glock *bd_gl;
 138        u64 bd_blkno;
 139
 140        struct list_head bd_list;
 141        const struct gfs2_log_operations *bd_ops;
 142
 143        struct gfs2_ail *bd_ail;
 144        struct list_head bd_ail_st_list;
 145        struct list_head bd_ail_gl_list;
 146};
 147
 148/*
 149 * Internally, we prefix things with gdlm_ and GDLM_ (for gfs-dlm) since a
 150 * prefix of lock_dlm_ gets awkward.
 151 */
 152
 153#define GDLM_STRNAME_BYTES      25
 154#define GDLM_LVB_SIZE           32
 155
 156/*
 157 * ls_recover_flags:
 158 *
 159 * DFL_BLOCK_LOCKS: dlm is in recovery and will grant locks that had been
 160 * held by failed nodes whose journals need recovery.  Those locks should
 161 * only be used for journal recovery until the journal recovery is done.
 162 * This is set by the dlm recover_prep callback and cleared by the
 163 * gfs2_control thread when journal recovery is complete.  To avoid
 164 * races between recover_prep setting and gfs2_control clearing, recover_spin
 165 * is held while changing this bit and reading/writing recover_block
 166 * and recover_start.
 167 *
 168 * DFL_NO_DLM_OPS: dlm lockspace ops/callbacks are not being used.
 169 *
 170 * DFL_FIRST_MOUNT: this node is the first to mount this fs and is doing
 171 * recovery of all journals before allowing other nodes to mount the fs.
 172 * This is cleared when FIRST_MOUNT_DONE is set.
 173 *
 174 * DFL_FIRST_MOUNT_DONE: this node was the first mounter, and has finished
 175 * recovery of all journals, and now allows other nodes to mount the fs.
 176 *
 177 * DFL_MOUNT_DONE: gdlm_mount has completed successfully and cleared
 178 * BLOCK_LOCKS for the first time.  The gfs2_control thread should now
 179 * control clearing BLOCK_LOCKS for further recoveries.
 180 *
 181 * DFL_UNMOUNT: gdlm_unmount sets to keep sdp off gfs2_control_wq.
 182 *
 183 * DFL_DLM_RECOVERY: set while dlm is in recovery, between recover_prep()
 184 * and recover_done(), i.e. set while recover_block == recover_start.
 185 */
 186
 187enum {
 188        DFL_BLOCK_LOCKS         = 0,
 189        DFL_NO_DLM_OPS          = 1,
 190        DFL_FIRST_MOUNT         = 2,
 191        DFL_FIRST_MOUNT_DONE    = 3,
 192        DFL_MOUNT_DONE          = 4,
 193        DFL_UNMOUNT             = 5,
 194        DFL_DLM_RECOVERY        = 6,
 195};
 196
 197struct lm_lockname {
 198        u64 ln_number;
 199        unsigned int ln_type;
 200};
 201
 202#define lm_name_equal(name1, name2) \
 203        (((name1)->ln_number == (name2)->ln_number) && \
 204         ((name1)->ln_type == (name2)->ln_type))
 205
 206
 207struct gfs2_glock_operations {
 208        void (*go_xmote_th) (struct gfs2_glock *gl);
 209        int (*go_xmote_bh) (struct gfs2_glock *gl, struct gfs2_holder *gh);
 210        void (*go_inval) (struct gfs2_glock *gl, int flags);
 211        int (*go_demote_ok) (const struct gfs2_glock *gl);
 212        int (*go_lock) (struct gfs2_holder *gh);
 213        void (*go_unlock) (struct gfs2_holder *gh);
 214        int (*go_dump)(struct seq_file *seq, const struct gfs2_glock *gl);
 215        void (*go_callback) (struct gfs2_glock *gl);
 216        const int go_type;
 217        const unsigned long go_flags;
 218#define GLOF_ASPACE 1
 219};
 220
 221enum {
 222        GFS2_LKS_SRTT = 0,      /* Non blocking smoothed round trip time */
 223        GFS2_LKS_SRTTVAR = 1,   /* Non blocking smoothed variance */
 224        GFS2_LKS_SRTTB = 2,     /* Blocking smoothed round trip time */
 225        GFS2_LKS_SRTTVARB = 3,  /* Blocking smoothed variance */
 226        GFS2_LKS_SIRT = 4,      /* Smoothed Inter-request time */
 227        GFS2_LKS_SIRTVAR = 5,   /* Smoothed Inter-request variance */
 228        GFS2_LKS_DCOUNT = 6,    /* Count of dlm requests */
 229        GFS2_LKS_QCOUNT = 7,    /* Count of gfs2_holder queues */
 230        GFS2_NR_LKSTATS
 231};
 232
 233struct gfs2_lkstats {
 234        s64 stats[GFS2_NR_LKSTATS];
 235};
 236
 237enum {
 238        /* States */
 239        HIF_HOLDER              = 6,  /* Set for gh that "holds" the glock */
 240        HIF_FIRST               = 7,
 241        HIF_WAIT                = 10,
 242};
 243
 244struct gfs2_holder {
 245        struct list_head gh_list;
 246
 247        struct gfs2_glock *gh_gl;
 248        struct pid *gh_owner_pid;
 249        unsigned int gh_state;
 250        unsigned gh_flags;
 251
 252        int gh_error;
 253        unsigned long gh_iflags; /* HIF_... */
 254        unsigned long gh_ip;
 255};
 256
 257/* Resource group multi-block reservation, in order of appearance:
 258
 259   Step 1. Function prepares to write, allocates a mb, sets the size hint.
 260   Step 2. User calls inplace_reserve to target an rgrp, sets the rgrp info
 261   Step 3. Function get_local_rgrp locks the rgrp, determines which bits to use
 262   Step 4. Bits are assigned from the rgrp based on either the reservation
 263           or wherever it can.
 264*/
 265
 266struct gfs2_blkreserv {
 267        /* components used during write (step 1): */
 268        atomic_t rs_sizehint;         /* hint of the write size */
 269
 270        struct gfs2_holder rs_rgd_gh; /* Filled in by get_local_rgrp */
 271        struct rb_node rs_node;       /* link to other block reservations */
 272        struct gfs2_rbm rs_rbm;       /* Start of reservation */
 273        u32 rs_free;                  /* how many blocks are still free */
 274        u64 rs_inum;                  /* Inode number for reservation */
 275
 276        /* ancillary quota stuff */
 277        struct gfs2_quota_data *rs_qa_qd[2 * MAXQUOTAS];
 278        struct gfs2_holder rs_qa_qd_ghs[2 * MAXQUOTAS];
 279        unsigned int rs_qa_qd_num;
 280};
 281
 282enum {
 283        GLF_LOCK                        = 1,
 284        GLF_DEMOTE                      = 3,
 285        GLF_PENDING_DEMOTE              = 4,
 286        GLF_DEMOTE_IN_PROGRESS          = 5,
 287        GLF_DIRTY                       = 6,
 288        GLF_LFLUSH                      = 7,
 289        GLF_INVALIDATE_IN_PROGRESS      = 8,
 290        GLF_REPLY_PENDING               = 9,
 291        GLF_INITIAL                     = 10,
 292        GLF_FROZEN                      = 11,
 293        GLF_QUEUED                      = 12,
 294        GLF_LRU                         = 13,
 295        GLF_OBJECT                      = 14, /* Used only for tracing */
 296        GLF_BLOCKING                    = 15,
 297};
 298
 299struct gfs2_glock {
 300        struct hlist_bl_node gl_list;
 301        struct gfs2_sbd *gl_sbd;
 302        unsigned long gl_flags;         /* GLF_... */
 303        struct lm_lockname gl_name;
 304        atomic_t gl_ref;
 305
 306        spinlock_t gl_spin;
 307
 308        /* State fields protected by gl_spin */
 309        unsigned int gl_state:2,        /* Current state */
 310                     gl_target:2,       /* Target state */
 311                     gl_demote_state:2, /* State requested by remote node */
 312                     gl_req:2,          /* State in last dlm request */
 313                     gl_reply:8;        /* Last reply from the dlm */
 314
 315        unsigned int gl_hash;
 316        unsigned long gl_demote_time; /* time of first demote request */
 317        long gl_hold_time;
 318        struct list_head gl_holders;
 319
 320        const struct gfs2_glock_operations *gl_ops;
 321        ktime_t gl_dstamp;
 322        struct gfs2_lkstats gl_stats;
 323        struct dlm_lksb gl_lksb;
 324        char gl_lvb[32];
 325        unsigned long gl_tchange;
 326        void *gl_object;
 327
 328        struct list_head gl_lru;
 329        struct list_head gl_ail_list;
 330        atomic_t gl_ail_count;
 331        atomic_t gl_revokes;
 332        struct delayed_work gl_work;
 333        struct work_struct gl_delete;
 334        struct rcu_head gl_rcu;
 335};
 336
 337#define GFS2_MIN_LVB_SIZE 32    /* Min size of LVB that gfs2 supports */
 338
 339enum {
 340        GIF_INVALID             = 0,
 341        GIF_QD_LOCKED           = 1,
 342        GIF_ALLOC_FAILED        = 2,
 343        GIF_SW_PAGED            = 3,
 344};
 345
 346struct gfs2_inode {
 347        struct inode i_inode;
 348        u64 i_no_addr;
 349        u64 i_no_formal_ino;
 350        u64 i_generation;
 351        u64 i_eattr;
 352        unsigned long i_flags;          /* GIF_... */
 353        struct gfs2_glock *i_gl; /* Move into i_gh? */
 354        struct gfs2_holder i_iopen_gh;
 355        struct gfs2_holder i_gh; /* for prepare/commit_write only */
 356        struct gfs2_blkreserv *i_res; /* rgrp multi-block reservation */
 357        struct gfs2_rgrpd *i_rgd;
 358        u64 i_goal;     /* goal block for allocations */
 359        struct rw_semaphore i_rw_mutex;
 360        struct list_head i_trunc_list;
 361        __be64 *i_hash_cache;
 362        u32 i_entries;
 363        u32 i_diskflags;
 364        u8 i_height;
 365        u8 i_depth;
 366};
 367
 368/*
 369 * Since i_inode is the first element of struct gfs2_inode,
 370 * this is effectively a cast.
 371 */
 372static inline struct gfs2_inode *GFS2_I(struct inode *inode)
 373{
 374        return container_of(inode, struct gfs2_inode, i_inode);
 375}
 376
 377static inline struct gfs2_sbd *GFS2_SB(const struct inode *inode)
 378{
 379        return inode->i_sb->s_fs_info;
 380}
 381
 382struct gfs2_file {
 383        struct mutex f_fl_mutex;
 384        struct gfs2_holder f_fl_gh;
 385};
 386
 387struct gfs2_revoke_replay {
 388        struct list_head rr_list;
 389        u64 rr_blkno;
 390        unsigned int rr_where;
 391};
 392
 393enum {
 394        QDF_USER                = 0,
 395        QDF_CHANGE              = 1,
 396        QDF_LOCKED              = 2,
 397        QDF_REFRESH             = 3,
 398};
 399
 400struct gfs2_quota_data {
 401        struct list_head qd_list;
 402        struct list_head qd_reclaim;
 403
 404        atomic_t qd_count;
 405
 406        u32 qd_id;
 407        unsigned long qd_flags;         /* QDF_... */
 408
 409        s64 qd_change;
 410        s64 qd_change_sync;
 411
 412        unsigned int qd_slot;
 413        unsigned int qd_slot_count;
 414
 415        struct buffer_head *qd_bh;
 416        struct gfs2_quota_change *qd_bh_qc;
 417        unsigned int qd_bh_count;
 418
 419        struct gfs2_glock *qd_gl;
 420        struct gfs2_quota_lvb qd_qb;
 421
 422        u64 qd_sync_gen;
 423        unsigned long qd_last_warn;
 424};
 425
 426struct gfs2_trans {
 427        unsigned long tr_ip;
 428
 429        unsigned int tr_blocks;
 430        unsigned int tr_revokes;
 431        unsigned int tr_reserved;
 432
 433        struct gfs2_holder tr_t_gh;
 434
 435        int tr_touched;
 436
 437        unsigned int tr_num_buf_new;
 438        unsigned int tr_num_databuf_new;
 439        unsigned int tr_num_buf_rm;
 440        unsigned int tr_num_databuf_rm;
 441        unsigned int tr_num_revoke;
 442        unsigned int tr_num_revoke_rm;
 443};
 444
 445struct gfs2_ail {
 446        struct list_head ai_list;
 447
 448        unsigned int ai_first;
 449        struct list_head ai_ail1_list;
 450        struct list_head ai_ail2_list;
 451};
 452
 453struct gfs2_journal_extent {
 454        struct list_head extent_list;
 455
 456        unsigned int lblock; /* First logical block */
 457        u64 dblock; /* First disk block */
 458        u64 blocks;
 459};
 460
 461struct gfs2_jdesc {
 462        struct list_head jd_list;
 463        struct list_head extent_list;
 464        struct work_struct jd_work;
 465        struct inode *jd_inode;
 466        unsigned long jd_flags;
 467#define JDF_RECOVERY 1
 468        unsigned int jd_jid;
 469        unsigned int jd_blocks;
 470        int jd_recover_error;
 471};
 472
 473struct gfs2_statfs_change_host {
 474        s64 sc_total;
 475        s64 sc_free;
 476        s64 sc_dinodes;
 477};
 478
 479#define GFS2_QUOTA_DEFAULT      GFS2_QUOTA_OFF
 480#define GFS2_QUOTA_OFF          0
 481#define GFS2_QUOTA_ACCOUNT      1
 482#define GFS2_QUOTA_ON           2
 483
 484#define GFS2_DATA_DEFAULT       GFS2_DATA_ORDERED
 485#define GFS2_DATA_WRITEBACK     1
 486#define GFS2_DATA_ORDERED       2
 487
 488#define GFS2_ERRORS_DEFAULT     GFS2_ERRORS_WITHDRAW
 489#define GFS2_ERRORS_WITHDRAW    0
 490#define GFS2_ERRORS_CONTINUE    1 /* place holder for future feature */
 491#define GFS2_ERRORS_RO          2 /* place holder for future feature */
 492#define GFS2_ERRORS_PANIC       3
 493
 494struct gfs2_args {
 495        char ar_lockproto[GFS2_LOCKNAME_LEN];   /* Name of the Lock Protocol */
 496        char ar_locktable[GFS2_LOCKNAME_LEN];   /* Name of the Lock Table */
 497        char ar_hostdata[GFS2_LOCKNAME_LEN];    /* Host specific data */
 498        unsigned int ar_spectator:1;            /* Don't get a journal */
 499        unsigned int ar_localflocks:1;          /* Let the VFS do flock|fcntl */
 500        unsigned int ar_debug:1;                /* Oops on errors */
 501        unsigned int ar_posix_acl:1;            /* Enable posix acls */
 502        unsigned int ar_quota:2;                /* off/account/on */
 503        unsigned int ar_suiddir:1;              /* suiddir support */
 504        unsigned int ar_data:2;                 /* ordered/writeback */
 505        unsigned int ar_meta:1;                 /* mount metafs */
 506        unsigned int ar_discard:1;              /* discard requests */
 507        unsigned int ar_errors:2;               /* errors=withdraw | panic */
 508        unsigned int ar_nobarrier:1;            /* do not send barriers */
 509        unsigned int ar_rgrplvb:1;              /* use lvbs for rgrp info */
 510        int ar_commit;                          /* Commit interval */
 511        int ar_statfs_quantum;                  /* The fast statfs interval */
 512        int ar_quota_quantum;                   /* The quota interval */
 513        int ar_statfs_percent;                  /* The % change to force sync */
 514};
 515
 516struct gfs2_tune {
 517        spinlock_t gt_spin;
 518
 519        unsigned int gt_logd_secs;
 520
 521        unsigned int gt_quota_simul_sync; /* Max quotavals to sync at once */
 522        unsigned int gt_quota_warn_period; /* Secs between quota warn msgs */
 523        unsigned int gt_quota_scale_num; /* Numerator */
 524        unsigned int gt_quota_scale_den; /* Denominator */
 525        unsigned int gt_quota_quantum; /* Secs between syncs to quota file */
 526        unsigned int gt_new_files_jdata;
 527        unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */
 528        unsigned int gt_complain_secs;
 529        unsigned int gt_statfs_quantum;
 530        unsigned int gt_statfs_slow;
 531};
 532
 533enum {
 534        SDF_JOURNAL_CHECKED     = 0,
 535        SDF_JOURNAL_LIVE        = 1,
 536        SDF_SHUTDOWN            = 2,
 537        SDF_NOBARRIERS          = 3,
 538        SDF_NORECOVERY          = 4,
 539        SDF_DEMOTE              = 5,
 540        SDF_NOJOURNALID         = 6,
 541        SDF_RORECOVERY          = 7, /* read only recovery */
 542};
 543
 544#define GFS2_FSNAME_LEN         256
 545
 546struct gfs2_inum_host {
 547        u64 no_formal_ino;
 548        u64 no_addr;
 549};
 550
 551struct gfs2_sb_host {
 552        u32 sb_magic;
 553        u32 sb_type;
 554        u32 sb_format;
 555
 556        u32 sb_fs_format;
 557        u32 sb_multihost_format;
 558        u32 sb_bsize;
 559        u32 sb_bsize_shift;
 560
 561        struct gfs2_inum_host sb_master_dir;
 562        struct gfs2_inum_host sb_root_dir;
 563
 564        char sb_lockproto[GFS2_LOCKNAME_LEN];
 565        char sb_locktable[GFS2_LOCKNAME_LEN];
 566};
 567
 568/*
 569 * lm_mount() return values
 570 *
 571 * ls_jid - the journal ID this node should use
 572 * ls_first - this node is the first to mount the file system
 573 * ls_lockspace - lock module's context for this file system
 574 * ls_ops - lock module's functions
 575 */
 576
 577struct lm_lockstruct {
 578        int ls_jid;
 579        unsigned int ls_first;
 580        const struct lm_lockops *ls_ops;
 581        dlm_lockspace_t *ls_dlm;
 582
 583        int ls_recover_jid_done;   /* These two are deprecated, */
 584        int ls_recover_jid_status; /* used previously by gfs_controld */
 585
 586        struct dlm_lksb ls_mounted_lksb; /* mounted_lock */
 587        struct dlm_lksb ls_control_lksb; /* control_lock */
 588        char ls_control_lvb[GDLM_LVB_SIZE]; /* control_lock lvb */
 589        struct completion ls_sync_wait; /* {control,mounted}_{lock,unlock} */
 590
 591        spinlock_t ls_recover_spin; /* protects following fields */
 592        unsigned long ls_recover_flags; /* DFL_ */
 593        uint32_t ls_recover_mount; /* gen in first recover_done cb */
 594        uint32_t ls_recover_start; /* gen in last recover_done cb */
 595        uint32_t ls_recover_block; /* copy recover_start in last recover_prep */
 596        uint32_t ls_recover_size; /* size of recover_submit, recover_result */
 597        uint32_t *ls_recover_submit; /* gen in last recover_slot cb per jid */
 598        uint32_t *ls_recover_result; /* result of last jid recovery */
 599};
 600
 601struct gfs2_pcpu_lkstats {
 602        /* One struct for each glock type */
 603        struct gfs2_lkstats lkstats[10];
 604};
 605
 606struct gfs2_sbd {
 607        struct super_block *sd_vfs;
 608        struct gfs2_pcpu_lkstats __percpu *sd_lkstats;
 609        struct kobject sd_kobj;
 610        unsigned long sd_flags; /* SDF_... */
 611        struct gfs2_sb_host sd_sb;
 612
 613        /* Constants computed on mount */
 614
 615        u32 sd_fsb2bb;
 616        u32 sd_fsb2bb_shift;
 617        u32 sd_diptrs;  /* Number of pointers in a dinode */
 618        u32 sd_inptrs;  /* Number of pointers in a indirect block */
 619        u32 sd_jbsize;  /* Size of a journaled data block */
 620        u32 sd_hash_bsize;      /* sizeof(exhash block) */
 621        u32 sd_hash_bsize_shift;
 622        u32 sd_hash_ptrs;       /* Number of pointers in a hash block */
 623        u32 sd_qc_per_block;
 624        u32 sd_max_dirres;      /* Max blocks needed to add a directory entry */
 625        u32 sd_max_height;      /* Max height of a file's metadata tree */
 626        u64 sd_heightsize[GFS2_MAX_META_HEIGHT + 1];
 627        u32 sd_max_jheight; /* Max height of journaled file's meta tree */
 628        u64 sd_jheightsize[GFS2_MAX_META_HEIGHT + 1];
 629
 630        struct gfs2_args sd_args;       /* Mount arguments */
 631        struct gfs2_tune sd_tune;       /* Filesystem tuning structure */
 632
 633        /* Lock Stuff */
 634
 635        struct lm_lockstruct sd_lockstruct;
 636        struct gfs2_holder sd_live_gh;
 637        struct gfs2_glock *sd_rename_gl;
 638        struct gfs2_glock *sd_trans_gl;
 639        wait_queue_head_t sd_glock_wait;
 640        atomic_t sd_glock_disposal;
 641        struct completion sd_locking_init;
 642        struct delayed_work sd_control_work;
 643
 644        /* Inode Stuff */
 645
 646        struct dentry *sd_master_dir;
 647        struct dentry *sd_root_dir;
 648
 649        struct inode *sd_jindex;
 650        struct inode *sd_statfs_inode;
 651        struct inode *sd_sc_inode;
 652        struct inode *sd_qc_inode;
 653        struct inode *sd_rindex;
 654        struct inode *sd_quota_inode;
 655
 656        /* StatFS stuff */
 657
 658        spinlock_t sd_statfs_spin;
 659        struct gfs2_statfs_change_host sd_statfs_master;
 660        struct gfs2_statfs_change_host sd_statfs_local;
 661        int sd_statfs_force_sync;
 662
 663        /* Resource group stuff */
 664
 665        int sd_rindex_uptodate;
 666        spinlock_t sd_rindex_spin;
 667        struct rb_root sd_rindex_tree;
 668        unsigned int sd_rgrps;
 669        unsigned int sd_max_rg_data;
 670
 671        /* Journal index stuff */
 672
 673        struct list_head sd_jindex_list;
 674        spinlock_t sd_jindex_spin;
 675        struct mutex sd_jindex_mutex;
 676        unsigned int sd_journals;
 677
 678        struct gfs2_jdesc *sd_jdesc;
 679        struct gfs2_holder sd_journal_gh;
 680        struct gfs2_holder sd_jinode_gh;
 681
 682        struct gfs2_holder sd_sc_gh;
 683        struct gfs2_holder sd_qc_gh;
 684
 685        /* Daemon stuff */
 686
 687        struct task_struct *sd_logd_process;
 688        struct task_struct *sd_quotad_process;
 689
 690        /* Quota stuff */
 691
 692        struct list_head sd_quota_list;
 693        atomic_t sd_quota_count;
 694        struct mutex sd_quota_mutex;
 695        wait_queue_head_t sd_quota_wait;
 696        struct list_head sd_trunc_list;
 697        spinlock_t sd_trunc_lock;
 698
 699        unsigned int sd_quota_slots;
 700        unsigned int sd_quota_chunks;
 701        unsigned char **sd_quota_bitmap;
 702
 703        u64 sd_quota_sync_gen;
 704
 705        /* Log stuff */
 706
 707        spinlock_t sd_log_lock;
 708
 709        unsigned int sd_log_blks_reserved;
 710        unsigned int sd_log_commited_buf;
 711        unsigned int sd_log_commited_databuf;
 712        int sd_log_commited_revoke;
 713
 714        atomic_t sd_log_pinned;
 715        unsigned int sd_log_num_buf;
 716        unsigned int sd_log_num_revoke;
 717        unsigned int sd_log_num_rg;
 718        unsigned int sd_log_num_databuf;
 719
 720        struct list_head sd_log_le_buf;
 721        struct list_head sd_log_le_revoke;
 722        struct list_head sd_log_le_databuf;
 723        struct list_head sd_log_le_ordered;
 724
 725        atomic_t sd_log_thresh1;
 726        atomic_t sd_log_thresh2;
 727        atomic_t sd_log_blks_free;
 728        wait_queue_head_t sd_log_waitq;
 729        wait_queue_head_t sd_logd_waitq;
 730
 731        u64 sd_log_sequence;
 732        unsigned int sd_log_head;
 733        unsigned int sd_log_tail;
 734        int sd_log_idle;
 735
 736        struct rw_semaphore sd_log_flush_lock;
 737        atomic_t sd_log_in_flight;
 738        struct bio *sd_log_bio;
 739        wait_queue_head_t sd_log_flush_wait;
 740        int sd_log_error;
 741
 742        unsigned int sd_log_flush_head;
 743        u64 sd_log_flush_wrapped;
 744
 745        spinlock_t sd_ail_lock;
 746        struct list_head sd_ail1_list;
 747        struct list_head sd_ail2_list;
 748
 749        /* Replay stuff */
 750
 751        struct list_head sd_revoke_list;
 752        unsigned int sd_replay_tail;
 753
 754        unsigned int sd_found_blocks;
 755        unsigned int sd_found_revokes;
 756        unsigned int sd_replayed_blocks;
 757
 758        /* For quiescing the filesystem */
 759
 760        struct gfs2_holder sd_freeze_gh;
 761        struct mutex sd_freeze_lock;
 762        unsigned int sd_freeze_count;
 763
 764        char sd_fsname[GFS2_FSNAME_LEN];
 765        char sd_table_name[GFS2_FSNAME_LEN];
 766        char sd_proto_name[GFS2_FSNAME_LEN];
 767
 768        /* Debugging crud */
 769
 770        unsigned long sd_last_warning;
 771        struct dentry *debugfs_dir;    /* debugfs directory */
 772        struct dentry *debugfs_dentry_glocks;
 773        struct dentry *debugfs_dentry_glstats;
 774        struct dentry *debugfs_dentry_sbstats;
 775};
 776
 777static inline void gfs2_glstats_inc(struct gfs2_glock *gl, int which)
 778{
 779        gl->gl_stats.stats[which]++;
 780}
 781
 782static inline void gfs2_sbstats_inc(const struct gfs2_glock *gl, int which)
 783{
 784        const struct gfs2_sbd *sdp = gl->gl_sbd;
 785        preempt_disable();
 786        this_cpu_ptr(sdp->sd_lkstats)->lkstats[gl->gl_name.ln_type].stats[which]++;
 787        preempt_enable();
 788}
 789
 790#endif /* __INCORE_DOT_H__ */
 791
 792
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