linux/fs/gfs2/incore.h
<<
>>
Prefs
   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        u32 rd_rs_cnt;                  /* count of current reservations */
 103};
 104
 105enum gfs2_state_bits {
 106        BH_Pinned = BH_PrivateStart,
 107        BH_Escaped = BH_PrivateStart + 1,
 108        BH_Zeronew = BH_PrivateStart + 2,
 109};
 110
 111BUFFER_FNS(Pinned, pinned)
 112TAS_BUFFER_FNS(Pinned, pinned)
 113BUFFER_FNS(Escaped, escaped)
 114TAS_BUFFER_FNS(Escaped, escaped)
 115BUFFER_FNS(Zeronew, zeronew)
 116TAS_BUFFER_FNS(Zeronew, zeronew)
 117
 118struct gfs2_bufdata {
 119        struct buffer_head *bd_bh;
 120        struct gfs2_glock *bd_gl;
 121        u64 bd_blkno;
 122
 123        struct list_head bd_list;
 124        const struct gfs2_log_operations *bd_ops;
 125
 126        struct gfs2_ail *bd_ail;
 127        struct list_head bd_ail_st_list;
 128        struct list_head bd_ail_gl_list;
 129};
 130
 131/*
 132 * Internally, we prefix things with gdlm_ and GDLM_ (for gfs-dlm) since a
 133 * prefix of lock_dlm_ gets awkward.
 134 */
 135
 136#define GDLM_STRNAME_BYTES      25
 137#define GDLM_LVB_SIZE           32
 138
 139/*
 140 * ls_recover_flags:
 141 *
 142 * DFL_BLOCK_LOCKS: dlm is in recovery and will grant locks that had been
 143 * held by failed nodes whose journals need recovery.  Those locks should
 144 * only be used for journal recovery until the journal recovery is done.
 145 * This is set by the dlm recover_prep callback and cleared by the
 146 * gfs2_control thread when journal recovery is complete.  To avoid
 147 * races between recover_prep setting and gfs2_control clearing, recover_spin
 148 * is held while changing this bit and reading/writing recover_block
 149 * and recover_start.
 150 *
 151 * DFL_NO_DLM_OPS: dlm lockspace ops/callbacks are not being used.
 152 *
 153 * DFL_FIRST_MOUNT: this node is the first to mount this fs and is doing
 154 * recovery of all journals before allowing other nodes to mount the fs.
 155 * This is cleared when FIRST_MOUNT_DONE is set.
 156 *
 157 * DFL_FIRST_MOUNT_DONE: this node was the first mounter, and has finished
 158 * recovery of all journals, and now allows other nodes to mount the fs.
 159 *
 160 * DFL_MOUNT_DONE: gdlm_mount has completed successfully and cleared
 161 * BLOCK_LOCKS for the first time.  The gfs2_control thread should now
 162 * control clearing BLOCK_LOCKS for further recoveries.
 163 *
 164 * DFL_UNMOUNT: gdlm_unmount sets to keep sdp off gfs2_control_wq.
 165 *
 166 * DFL_DLM_RECOVERY: set while dlm is in recovery, between recover_prep()
 167 * and recover_done(), i.e. set while recover_block == recover_start.
 168 */
 169
 170enum {
 171        DFL_BLOCK_LOCKS         = 0,
 172        DFL_NO_DLM_OPS          = 1,
 173        DFL_FIRST_MOUNT         = 2,
 174        DFL_FIRST_MOUNT_DONE    = 3,
 175        DFL_MOUNT_DONE          = 4,
 176        DFL_UNMOUNT             = 5,
 177        DFL_DLM_RECOVERY        = 6,
 178};
 179
 180struct lm_lockname {
 181        u64 ln_number;
 182        unsigned int ln_type;
 183};
 184
 185#define lm_name_equal(name1, name2) \
 186        (((name1)->ln_number == (name2)->ln_number) && \
 187         ((name1)->ln_type == (name2)->ln_type))
 188
 189
 190struct gfs2_glock_operations {
 191        void (*go_xmote_th) (struct gfs2_glock *gl);
 192        int (*go_xmote_bh) (struct gfs2_glock *gl, struct gfs2_holder *gh);
 193        void (*go_inval) (struct gfs2_glock *gl, int flags);
 194        int (*go_demote_ok) (const struct gfs2_glock *gl);
 195        int (*go_lock) (struct gfs2_holder *gh);
 196        void (*go_unlock) (struct gfs2_holder *gh);
 197        int (*go_dump)(struct seq_file *seq, const struct gfs2_glock *gl);
 198        void (*go_callback) (struct gfs2_glock *gl);
 199        const int go_type;
 200        const unsigned long go_flags;
 201#define GLOF_ASPACE 1
 202};
 203
 204enum {
 205        GFS2_LKS_SRTT = 0,      /* Non blocking smoothed round trip time */
 206        GFS2_LKS_SRTTVAR = 1,   /* Non blocking smoothed variance */
 207        GFS2_LKS_SRTTB = 2,     /* Blocking smoothed round trip time */
 208        GFS2_LKS_SRTTVARB = 3,  /* Blocking smoothed variance */
 209        GFS2_LKS_SIRT = 4,      /* Smoothed Inter-request time */
 210        GFS2_LKS_SIRTVAR = 5,   /* Smoothed Inter-request variance */
 211        GFS2_LKS_DCOUNT = 6,    /* Count of dlm requests */
 212        GFS2_LKS_QCOUNT = 7,    /* Count of gfs2_holder queues */
 213        GFS2_NR_LKSTATS
 214};
 215
 216struct gfs2_lkstats {
 217        s64 stats[GFS2_NR_LKSTATS];
 218};
 219
 220enum {
 221        /* States */
 222        HIF_HOLDER              = 6,  /* Set for gh that "holds" the glock */
 223        HIF_FIRST               = 7,
 224        HIF_WAIT                = 10,
 225};
 226
 227struct gfs2_holder {
 228        struct list_head gh_list;
 229
 230        struct gfs2_glock *gh_gl;
 231        struct pid *gh_owner_pid;
 232        unsigned int gh_state;
 233        unsigned gh_flags;
 234
 235        int gh_error;
 236        unsigned long gh_iflags; /* HIF_... */
 237        unsigned long gh_ip;
 238};
 239
 240/* Resource group multi-block reservation, in order of appearance:
 241
 242   Step 1. Function prepares to write, allocates a mb, sets the size hint.
 243   Step 2. User calls inplace_reserve to target an rgrp, sets the rgrp info
 244   Step 3. Function get_local_rgrp locks the rgrp, determines which bits to use
 245   Step 4. Bits are assigned from the rgrp based on either the reservation
 246           or wherever it can.
 247*/
 248
 249struct gfs2_blkreserv {
 250        /* components used during write (step 1): */
 251        atomic_t rs_sizehint;         /* hint of the write size */
 252
 253        /* components used during inplace_reserve (step 2): */
 254        u32 rs_requested; /* Filled in by caller of gfs2_inplace_reserve() */
 255
 256        /* components used during get_local_rgrp (step 3): */
 257        struct gfs2_rgrpd *rs_rgd;    /* pointer to the gfs2_rgrpd */
 258        struct gfs2_holder rs_rgd_gh; /* Filled in by get_local_rgrp */
 259        struct rb_node rs_node;       /* link to other block reservations */
 260
 261        /* components used during block searches and assignments (step 4): */
 262        struct gfs2_bitmap *rs_bi;    /* bitmap for the current allocation */
 263        u32 rs_biblk;                 /* start block relative to the bi */
 264        u32 rs_free;                  /* how many blocks are still free */
 265
 266        /* ancillary quota stuff */
 267        struct gfs2_quota_data *rs_qa_qd[2 * MAXQUOTAS];
 268        struct gfs2_holder rs_qa_qd_ghs[2 * MAXQUOTAS];
 269        unsigned int rs_qa_qd_num;
 270};
 271
 272enum {
 273        GLF_LOCK                        = 1,
 274        GLF_DEMOTE                      = 3,
 275        GLF_PENDING_DEMOTE              = 4,
 276        GLF_DEMOTE_IN_PROGRESS          = 5,
 277        GLF_DIRTY                       = 6,
 278        GLF_LFLUSH                      = 7,
 279        GLF_INVALIDATE_IN_PROGRESS      = 8,
 280        GLF_REPLY_PENDING               = 9,
 281        GLF_INITIAL                     = 10,
 282        GLF_FROZEN                      = 11,
 283        GLF_QUEUED                      = 12,
 284        GLF_LRU                         = 13,
 285        GLF_OBJECT                      = 14, /* Used only for tracing */
 286        GLF_BLOCKING                    = 15,
 287};
 288
 289struct gfs2_glock {
 290        struct hlist_bl_node gl_list;
 291        struct gfs2_sbd *gl_sbd;
 292        unsigned long gl_flags;         /* GLF_... */
 293        struct lm_lockname gl_name;
 294        atomic_t gl_ref;
 295
 296        spinlock_t gl_spin;
 297
 298        /* State fields protected by gl_spin */
 299        unsigned int gl_state:2,        /* Current state */
 300                     gl_target:2,       /* Target state */
 301                     gl_demote_state:2, /* State requested by remote node */
 302                     gl_req:2,          /* State in last dlm request */
 303                     gl_reply:8;        /* Last reply from the dlm */
 304
 305        unsigned int gl_hash;
 306        unsigned long gl_demote_time; /* time of first demote request */
 307        long gl_hold_time;
 308        struct list_head gl_holders;
 309
 310        const struct gfs2_glock_operations *gl_ops;
 311        ktime_t gl_dstamp;
 312        struct gfs2_lkstats gl_stats;
 313        struct dlm_lksb gl_lksb;
 314        char gl_lvb[32];
 315        unsigned long gl_tchange;
 316        void *gl_object;
 317
 318        struct list_head gl_lru;
 319        struct list_head gl_ail_list;
 320        atomic_t gl_ail_count;
 321        atomic_t gl_revokes;
 322        struct delayed_work gl_work;
 323        struct work_struct gl_delete;
 324        struct rcu_head gl_rcu;
 325};
 326
 327#define GFS2_MIN_LVB_SIZE 32    /* Min size of LVB that gfs2 supports */
 328
 329enum {
 330        GIF_INVALID             = 0,
 331        GIF_QD_LOCKED           = 1,
 332        GIF_ALLOC_FAILED        = 2,
 333        GIF_SW_PAGED            = 3,
 334};
 335
 336struct gfs2_inode {
 337        struct inode i_inode;
 338        u64 i_no_addr;
 339        u64 i_no_formal_ino;
 340        u64 i_generation;
 341        u64 i_eattr;
 342        unsigned long i_flags;          /* GIF_... */
 343        struct gfs2_glock *i_gl; /* Move into i_gh? */
 344        struct gfs2_holder i_iopen_gh;
 345        struct gfs2_holder i_gh; /* for prepare/commit_write only */
 346        struct gfs2_blkreserv *i_res; /* rgrp multi-block reservation */
 347        struct gfs2_rgrpd *i_rgd;
 348        u64 i_goal;     /* goal block for allocations */
 349        struct rw_semaphore i_rw_mutex;
 350        struct list_head i_trunc_list;
 351        __be64 *i_hash_cache;
 352        u32 i_entries;
 353        u32 i_diskflags;
 354        u8 i_height;
 355        u8 i_depth;
 356};
 357
 358/*
 359 * Since i_inode is the first element of struct gfs2_inode,
 360 * this is effectively a cast.
 361 */
 362static inline struct gfs2_inode *GFS2_I(struct inode *inode)
 363{
 364        return container_of(inode, struct gfs2_inode, i_inode);
 365}
 366
 367static inline struct gfs2_sbd *GFS2_SB(const struct inode *inode)
 368{
 369        return inode->i_sb->s_fs_info;
 370}
 371
 372struct gfs2_file {
 373        struct mutex f_fl_mutex;
 374        struct gfs2_holder f_fl_gh;
 375};
 376
 377struct gfs2_revoke_replay {
 378        struct list_head rr_list;
 379        u64 rr_blkno;
 380        unsigned int rr_where;
 381};
 382
 383enum {
 384        QDF_USER                = 0,
 385        QDF_CHANGE              = 1,
 386        QDF_LOCKED              = 2,
 387        QDF_REFRESH             = 3,
 388};
 389
 390struct gfs2_quota_data {
 391        struct list_head qd_list;
 392        struct list_head qd_reclaim;
 393
 394        atomic_t qd_count;
 395
 396        u32 qd_id;
 397        unsigned long qd_flags;         /* QDF_... */
 398
 399        s64 qd_change;
 400        s64 qd_change_sync;
 401
 402        unsigned int qd_slot;
 403        unsigned int qd_slot_count;
 404
 405        struct buffer_head *qd_bh;
 406        struct gfs2_quota_change *qd_bh_qc;
 407        unsigned int qd_bh_count;
 408
 409        struct gfs2_glock *qd_gl;
 410        struct gfs2_quota_lvb qd_qb;
 411
 412        u64 qd_sync_gen;
 413        unsigned long qd_last_warn;
 414};
 415
 416struct gfs2_trans {
 417        unsigned long tr_ip;
 418
 419        unsigned int tr_blocks;
 420        unsigned int tr_revokes;
 421        unsigned int tr_reserved;
 422
 423        struct gfs2_holder tr_t_gh;
 424
 425        int tr_touched;
 426
 427        unsigned int tr_num_buf_new;
 428        unsigned int tr_num_databuf_new;
 429        unsigned int tr_num_buf_rm;
 430        unsigned int tr_num_databuf_rm;
 431        unsigned int tr_num_revoke;
 432        unsigned int tr_num_revoke_rm;
 433};
 434
 435struct gfs2_ail {
 436        struct list_head ai_list;
 437
 438        unsigned int ai_first;
 439        struct list_head ai_ail1_list;
 440        struct list_head ai_ail2_list;
 441};
 442
 443struct gfs2_journal_extent {
 444        struct list_head extent_list;
 445
 446        unsigned int lblock; /* First logical block */
 447        u64 dblock; /* First disk block */
 448        u64 blocks;
 449};
 450
 451struct gfs2_jdesc {
 452        struct list_head jd_list;
 453        struct list_head extent_list;
 454        struct work_struct jd_work;
 455        struct inode *jd_inode;
 456        unsigned long jd_flags;
 457#define JDF_RECOVERY 1
 458        unsigned int jd_jid;
 459        unsigned int jd_blocks;
 460        int jd_recover_error;
 461};
 462
 463struct gfs2_statfs_change_host {
 464        s64 sc_total;
 465        s64 sc_free;
 466        s64 sc_dinodes;
 467};
 468
 469#define GFS2_QUOTA_DEFAULT      GFS2_QUOTA_OFF
 470#define GFS2_QUOTA_OFF          0
 471#define GFS2_QUOTA_ACCOUNT      1
 472#define GFS2_QUOTA_ON           2
 473
 474#define GFS2_DATA_DEFAULT       GFS2_DATA_ORDERED
 475#define GFS2_DATA_WRITEBACK     1
 476#define GFS2_DATA_ORDERED       2
 477
 478#define GFS2_ERRORS_DEFAULT     GFS2_ERRORS_WITHDRAW
 479#define GFS2_ERRORS_WITHDRAW    0
 480#define GFS2_ERRORS_CONTINUE    1 /* place holder for future feature */
 481#define GFS2_ERRORS_RO          2 /* place holder for future feature */
 482#define GFS2_ERRORS_PANIC       3
 483
 484struct gfs2_args {
 485        char ar_lockproto[GFS2_LOCKNAME_LEN];   /* Name of the Lock Protocol */
 486        char ar_locktable[GFS2_LOCKNAME_LEN];   /* Name of the Lock Table */
 487        char ar_hostdata[GFS2_LOCKNAME_LEN];    /* Host specific data */
 488        unsigned int ar_spectator:1;            /* Don't get a journal */
 489        unsigned int ar_localflocks:1;          /* Let the VFS do flock|fcntl */
 490        unsigned int ar_debug:1;                /* Oops on errors */
 491        unsigned int ar_posix_acl:1;            /* Enable posix acls */
 492        unsigned int ar_quota:2;                /* off/account/on */
 493        unsigned int ar_suiddir:1;              /* suiddir support */
 494        unsigned int ar_data:2;                 /* ordered/writeback */
 495        unsigned int ar_meta:1;                 /* mount metafs */
 496        unsigned int ar_discard:1;              /* discard requests */
 497        unsigned int ar_errors:2;               /* errors=withdraw | panic */
 498        unsigned int ar_nobarrier:1;            /* do not send barriers */
 499        unsigned int ar_rgrplvb:1;              /* use lvbs for rgrp info */
 500        int ar_commit;                          /* Commit interval */
 501        int ar_statfs_quantum;                  /* The fast statfs interval */
 502        int ar_quota_quantum;                   /* The quota interval */
 503        int ar_statfs_percent;                  /* The % change to force sync */
 504};
 505
 506struct gfs2_tune {
 507        spinlock_t gt_spin;
 508
 509        unsigned int gt_logd_secs;
 510
 511        unsigned int gt_quota_simul_sync; /* Max quotavals to sync at once */
 512        unsigned int gt_quota_warn_period; /* Secs between quota warn msgs */
 513        unsigned int gt_quota_scale_num; /* Numerator */
 514        unsigned int gt_quota_scale_den; /* Denominator */
 515        unsigned int gt_quota_quantum; /* Secs between syncs to quota file */
 516        unsigned int gt_new_files_jdata;
 517        unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */
 518        unsigned int gt_complain_secs;
 519        unsigned int gt_statfs_quantum;
 520        unsigned int gt_statfs_slow;
 521};
 522
 523enum {
 524        SDF_JOURNAL_CHECKED     = 0,
 525        SDF_JOURNAL_LIVE        = 1,
 526        SDF_SHUTDOWN            = 2,
 527        SDF_NOBARRIERS          = 3,
 528        SDF_NORECOVERY          = 4,
 529        SDF_DEMOTE              = 5,
 530        SDF_NOJOURNALID         = 6,
 531        SDF_RORECOVERY          = 7, /* read only recovery */
 532};
 533
 534#define GFS2_FSNAME_LEN         256
 535
 536struct gfs2_inum_host {
 537        u64 no_formal_ino;
 538        u64 no_addr;
 539};
 540
 541struct gfs2_sb_host {
 542        u32 sb_magic;
 543        u32 sb_type;
 544        u32 sb_format;
 545
 546        u32 sb_fs_format;
 547        u32 sb_multihost_format;
 548        u32 sb_bsize;
 549        u32 sb_bsize_shift;
 550
 551        struct gfs2_inum_host sb_master_dir;
 552        struct gfs2_inum_host sb_root_dir;
 553
 554        char sb_lockproto[GFS2_LOCKNAME_LEN];
 555        char sb_locktable[GFS2_LOCKNAME_LEN];
 556};
 557
 558/*
 559 * lm_mount() return values
 560 *
 561 * ls_jid - the journal ID this node should use
 562 * ls_first - this node is the first to mount the file system
 563 * ls_lockspace - lock module's context for this file system
 564 * ls_ops - lock module's functions
 565 */
 566
 567struct lm_lockstruct {
 568        int ls_jid;
 569        unsigned int ls_first;
 570        const struct lm_lockops *ls_ops;
 571        dlm_lockspace_t *ls_dlm;
 572
 573        int ls_recover_jid_done;   /* These two are deprecated, */
 574        int ls_recover_jid_status; /* used previously by gfs_controld */
 575
 576        struct dlm_lksb ls_mounted_lksb; /* mounted_lock */
 577        struct dlm_lksb ls_control_lksb; /* control_lock */
 578        char ls_control_lvb[GDLM_LVB_SIZE]; /* control_lock lvb */
 579        struct completion ls_sync_wait; /* {control,mounted}_{lock,unlock} */
 580
 581        spinlock_t ls_recover_spin; /* protects following fields */
 582        unsigned long ls_recover_flags; /* DFL_ */
 583        uint32_t ls_recover_mount; /* gen in first recover_done cb */
 584        uint32_t ls_recover_start; /* gen in last recover_done cb */
 585        uint32_t ls_recover_block; /* copy recover_start in last recover_prep */
 586        uint32_t ls_recover_size; /* size of recover_submit, recover_result */
 587        uint32_t *ls_recover_submit; /* gen in last recover_slot cb per jid */
 588        uint32_t *ls_recover_result; /* result of last jid recovery */
 589};
 590
 591struct gfs2_pcpu_lkstats {
 592        /* One struct for each glock type */
 593        struct gfs2_lkstats lkstats[10];
 594};
 595
 596struct gfs2_sbd {
 597        struct super_block *sd_vfs;
 598        struct gfs2_pcpu_lkstats __percpu *sd_lkstats;
 599        struct kobject sd_kobj;
 600        unsigned long sd_flags; /* SDF_... */
 601        struct gfs2_sb_host sd_sb;
 602
 603        /* Constants computed on mount */
 604
 605        u32 sd_fsb2bb;
 606        u32 sd_fsb2bb_shift;
 607        u32 sd_diptrs;  /* Number of pointers in a dinode */
 608        u32 sd_inptrs;  /* Number of pointers in a indirect block */
 609        u32 sd_jbsize;  /* Size of a journaled data block */
 610        u32 sd_hash_bsize;      /* sizeof(exhash block) */
 611        u32 sd_hash_bsize_shift;
 612        u32 sd_hash_ptrs;       /* Number of pointers in a hash block */
 613        u32 sd_qc_per_block;
 614        u32 sd_max_dirres;      /* Max blocks needed to add a directory entry */
 615        u32 sd_max_height;      /* Max height of a file's metadata tree */
 616        u64 sd_heightsize[GFS2_MAX_META_HEIGHT + 1];
 617        u32 sd_max_jheight; /* Max height of journaled file's meta tree */
 618        u64 sd_jheightsize[GFS2_MAX_META_HEIGHT + 1];
 619
 620        struct gfs2_args sd_args;       /* Mount arguments */
 621        struct gfs2_tune sd_tune;       /* Filesystem tuning structure */
 622
 623        /* Lock Stuff */
 624
 625        struct lm_lockstruct sd_lockstruct;
 626        struct gfs2_holder sd_live_gh;
 627        struct gfs2_glock *sd_rename_gl;
 628        struct gfs2_glock *sd_trans_gl;
 629        wait_queue_head_t sd_glock_wait;
 630        atomic_t sd_glock_disposal;
 631        struct completion sd_locking_init;
 632        struct delayed_work sd_control_work;
 633
 634        /* Inode Stuff */
 635
 636        struct dentry *sd_master_dir;
 637        struct dentry *sd_root_dir;
 638
 639        struct inode *sd_jindex;
 640        struct inode *sd_statfs_inode;
 641        struct inode *sd_sc_inode;
 642        struct inode *sd_qc_inode;
 643        struct inode *sd_rindex;
 644        struct inode *sd_quota_inode;
 645
 646        /* StatFS stuff */
 647
 648        spinlock_t sd_statfs_spin;
 649        struct gfs2_statfs_change_host sd_statfs_master;
 650        struct gfs2_statfs_change_host sd_statfs_local;
 651        int sd_statfs_force_sync;
 652
 653        /* Resource group stuff */
 654
 655        int sd_rindex_uptodate;
 656        spinlock_t sd_rindex_spin;
 657        struct rb_root sd_rindex_tree;
 658        unsigned int sd_rgrps;
 659        unsigned int sd_max_rg_data;
 660
 661        /* Journal index stuff */
 662
 663        struct list_head sd_jindex_list;
 664        spinlock_t sd_jindex_spin;
 665        struct mutex sd_jindex_mutex;
 666        unsigned int sd_journals;
 667
 668        struct gfs2_jdesc *sd_jdesc;
 669        struct gfs2_holder sd_journal_gh;
 670        struct gfs2_holder sd_jinode_gh;
 671
 672        struct gfs2_holder sd_sc_gh;
 673        struct gfs2_holder sd_qc_gh;
 674
 675        /* Daemon stuff */
 676
 677        struct task_struct *sd_logd_process;
 678        struct task_struct *sd_quotad_process;
 679
 680        /* Quota stuff */
 681
 682        struct list_head sd_quota_list;
 683        atomic_t sd_quota_count;
 684        struct mutex sd_quota_mutex;
 685        wait_queue_head_t sd_quota_wait;
 686        struct list_head sd_trunc_list;
 687        spinlock_t sd_trunc_lock;
 688
 689        unsigned int sd_quota_slots;
 690        unsigned int sd_quota_chunks;
 691        unsigned char **sd_quota_bitmap;
 692
 693        u64 sd_quota_sync_gen;
 694
 695        /* Log stuff */
 696
 697        spinlock_t sd_log_lock;
 698
 699        unsigned int sd_log_blks_reserved;
 700        unsigned int sd_log_commited_buf;
 701        unsigned int sd_log_commited_databuf;
 702        int sd_log_commited_revoke;
 703
 704        atomic_t sd_log_pinned;
 705        unsigned int sd_log_num_buf;
 706        unsigned int sd_log_num_revoke;
 707        unsigned int sd_log_num_rg;
 708        unsigned int sd_log_num_databuf;
 709
 710        struct list_head sd_log_le_buf;
 711        struct list_head sd_log_le_revoke;
 712        struct list_head sd_log_le_databuf;
 713        struct list_head sd_log_le_ordered;
 714
 715        atomic_t sd_log_thresh1;
 716        atomic_t sd_log_thresh2;
 717        atomic_t sd_log_blks_free;
 718        wait_queue_head_t sd_log_waitq;
 719        wait_queue_head_t sd_logd_waitq;
 720
 721        u64 sd_log_sequence;
 722        unsigned int sd_log_head;
 723        unsigned int sd_log_tail;
 724        int sd_log_idle;
 725
 726        struct rw_semaphore sd_log_flush_lock;
 727        atomic_t sd_log_in_flight;
 728        struct bio *sd_log_bio;
 729        wait_queue_head_t sd_log_flush_wait;
 730        int sd_log_error;
 731
 732        unsigned int sd_log_flush_head;
 733        u64 sd_log_flush_wrapped;
 734
 735        spinlock_t sd_ail_lock;
 736        struct list_head sd_ail1_list;
 737        struct list_head sd_ail2_list;
 738
 739        /* Replay stuff */
 740
 741        struct list_head sd_revoke_list;
 742        unsigned int sd_replay_tail;
 743
 744        unsigned int sd_found_blocks;
 745        unsigned int sd_found_revokes;
 746        unsigned int sd_replayed_blocks;
 747
 748        /* For quiescing the filesystem */
 749
 750        struct gfs2_holder sd_freeze_gh;
 751        struct mutex sd_freeze_lock;
 752        unsigned int sd_freeze_count;
 753
 754        char sd_fsname[GFS2_FSNAME_LEN];
 755        char sd_table_name[GFS2_FSNAME_LEN];
 756        char sd_proto_name[GFS2_FSNAME_LEN];
 757
 758        /* Debugging crud */
 759
 760        unsigned long sd_last_warning;
 761        struct dentry *debugfs_dir;    /* debugfs directory */
 762        struct dentry *debugfs_dentry_glocks;
 763        struct dentry *debugfs_dentry_glstats;
 764        struct dentry *debugfs_dentry_sbstats;
 765};
 766
 767static inline void gfs2_glstats_inc(struct gfs2_glock *gl, int which)
 768{
 769        gl->gl_stats.stats[which]++;
 770}
 771
 772static inline void gfs2_sbstats_inc(const struct gfs2_glock *gl, int which)
 773{
 774        const struct gfs2_sbd *sdp = gl->gl_sbd;
 775        preempt_disable();
 776        this_cpu_ptr(sdp->sd_lkstats)->lkstats[gl->gl_name.ln_type].stats[which]++;
 777        preempt_enable();
 778}
 779
 780#endif /* __INCORE_DOT_H__ */
 781
 782
lxr.linux.no kindly hosted by Redpill Linpro AS, provider of Linux consulting and operations services since 1995.