fs/gfs2/incore.h

   1 /*
   2  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
   3  * Copyright (C) 2004-2006 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
  15 #define DIO_WAIT        0x00000010
  16 #define DIO_METADATA    0x00000020
  17 #define DIO_ALL         0x00000100
  18
  19 struct gfs2_log_operations;
  20 struct gfs2_log_element;
  21 struct gfs2_holder;
  22 struct gfs2_glock;
  23 struct gfs2_quota_data;
  24 struct gfs2_trans;
  25 struct gfs2_ail;
  26 struct gfs2_jdesc;
  27 struct gfs2_sbd;
  28
  29 typedef void (*gfs2_glop_bh_t) (struct gfs2_glock *gl, unsigned int ret);
  30
  31 /*
  32  * Structure of operations that are associated with each
  33  * type of element in the log.
  34  */
  35
  36 struct gfs2_log_operations {
  37         void (*lo_add) (struct gfs2_sbd *sdp, struct gfs2_log_element *le);
  38         void (*lo_incore_commit) (struct gfs2_sbd *sdp, struct gfs2_trans *tr);
  39         void (*lo_before_commit) (struct gfs2_sbd *sdp);
  40         void (*lo_after_commit) (struct gfs2_sbd *sdp, struct gfs2_ail *ai);
  41         void (*lo_before_scan) (struct gfs2_jdesc *jd,
  42                                 struct gfs2_log_header_host *head, int pass);
  43         int (*lo_scan_elements) (struct gfs2_jdesc *jd, unsigned int start,
  44                                  struct gfs2_log_descriptor *ld, __be64 *ptr,
  45                                  int pass);
  46         void (*lo_after_scan) (struct gfs2_jdesc *jd, int error, int pass);
  47         const char *lo_name;
  48 };
  49
  50 struct gfs2_log_element {
  51         struct list_head le_list;
  52         const struct gfs2_log_operations *le_ops;
  53 };
  54
  55 struct gfs2_bitmap {
  56         struct buffer_head *bi_bh;
  57         char *bi_clone;
  58         u32 bi_offset;
  59         u32 bi_start;
  60         u32 bi_len;
  61 };
  62
  63 struct gfs2_rgrpd {
  64         struct list_head rd_list;       /* Link with superblock */
  65         struct list_head rd_list_mru;
  66         struct list_head rd_recent;     /* Recently used rgrps */
  67         struct gfs2_glock *rd_gl;       /* Glock for this rgrp */
  68         struct gfs2_rindex_host rd_ri;
  69         struct gfs2_rgrp_host rd_rg;
  70         u64 rd_rg_vn;
  71         struct gfs2_bitmap *rd_bits;
  72         unsigned int rd_bh_count;
  73         struct mutex rd_mutex;
  74         u32 rd_free_clone;
  75         struct gfs2_log_element rd_le;
  76         u32 rd_last_alloc_data;
  77         u32 rd_last_alloc_meta;
  78         struct gfs2_sbd *rd_sbd;
  79 };
  80
  81 enum gfs2_state_bits {
  82         BH_Pinned = BH_PrivateStart,
  83         BH_Escaped = BH_PrivateStart + 1,
  84 };
  85
  86 BUFFER_FNS(Pinned, pinned)
  87 TAS_BUFFER_FNS(Pinned, pinned)
  88 BUFFER_FNS(Escaped, escaped)
  89 TAS_BUFFER_FNS(Escaped, escaped)
  90
  91 struct gfs2_bufdata {
  92         struct buffer_head *bd_bh;
  93         struct gfs2_glock *bd_gl;
  94
  95         struct list_head bd_list_tr;
  96         struct gfs2_log_element bd_le;
  97
  98         struct gfs2_ail *bd_ail;
  99         struct list_head bd_ail_st_list;
 100         struct list_head bd_ail_gl_list;
 101 };
 102
 103 struct gfs2_glock_operations {
 104         void (*go_xmote_th) (struct gfs2_glock *gl);
 105         void (*go_xmote_bh) (struct gfs2_glock *gl);
 106         void (*go_drop_th) (struct gfs2_glock *gl);
 107         void (*go_drop_bh) (struct gfs2_glock *gl);
 108         void (*go_inval) (struct gfs2_glock *gl, int flags);
 109         int (*go_demote_ok) (struct gfs2_glock *gl);
 110         int (*go_lock) (struct gfs2_holder *gh);
 111         void (*go_unlock) (struct gfs2_holder *gh);
 112         const int go_type;
 113 };
 114
 115 enum {
 116         /* Actions */
 117         HIF_MUTEX               = 0,
 118         HIF_PROMOTE             = 1,
 119         HIF_DEMOTE              = 2,
 120
 121         /* States */
 122         HIF_ALLOCED             = 4,
 123         HIF_DEALLOC             = 5,
 124         HIF_HOLDER              = 6,
 125         HIF_FIRST               = 7,
 126         HIF_ABORTED             = 9,
 127         HIF_WAIT                = 10,
 128 };
 129
 130 struct gfs2_holder {
 131         struct list_head gh_list;
 132
 133         struct gfs2_glock *gh_gl;
 134         struct task_struct *gh_owner;
 135         unsigned int gh_state;
 136         unsigned gh_flags;
 137
 138         int gh_error;
 139         unsigned long gh_iflags;
 140         unsigned long gh_ip;
 141 };
 142
 143 enum {
 144         GLF_LOCK                = 1,
 145         GLF_STICKY              = 2,
 146         GLF_DIRTY               = 5,
 147         GLF_SKIP_WAITERS2       = 6,
 148 };
 149
 150 struct gfs2_glock {
 151         struct hlist_node gl_list;
 152         unsigned long gl_flags;         /* GLF_... */
 153         struct lm_lockname gl_name;
 154         atomic_t gl_ref;
 155
 156         spinlock_t gl_spin;
 157
 158         unsigned int gl_state;
 159         unsigned int gl_hash;
 160         struct task_struct *gl_owner;
 161         unsigned long gl_ip;
 162         struct list_head gl_holders;
 163         struct list_head gl_waiters1;   /* HIF_MUTEX */
 164         struct list_head gl_waiters2;   /* HIF_DEMOTE */
 165         struct list_head gl_waiters3;   /* HIF_PROMOTE */
 166
 167         const struct gfs2_glock_operations *gl_ops;
 168
 169         struct gfs2_holder *gl_req_gh;
 170         gfs2_glop_bh_t gl_req_bh;
 171
 172         void *gl_lock;
 173         char *gl_lvb;
 174         atomic_t gl_lvb_count;
 175
 176         u64 gl_vn;
 177         unsigned long gl_stamp;
 178         void *gl_object;
 179
 180         struct list_head gl_reclaim;
 181
 182         struct gfs2_sbd *gl_sbd;
 183
 184         struct inode *gl_aspace;
 185         struct gfs2_log_element gl_le;
 186         struct list_head gl_ail_list;
 187         atomic_t gl_ail_count;
 188 };
 189
 190 struct gfs2_alloc {
 191         /* Quota stuff */
 192
 193         struct gfs2_quota_data *al_qd[2*MAXQUOTAS];
 194         struct gfs2_holder al_qd_ghs[2*MAXQUOTAS];
 195         unsigned int al_qd_num;
 196
 197         u32 al_requested; /* Filled in by caller of gfs2_inplace_reserve() */
 198         u32 al_alloced; /* Filled in by gfs2_alloc_*() */
 199
 200         /* Filled in by gfs2_inplace_reserve() */
 201
 202         unsigned int al_line;
 203         char *al_file;
 204         struct gfs2_holder al_ri_gh;
 205         struct gfs2_holder al_rgd_gh;
 206         struct gfs2_rgrpd *al_rgd;
 207
 208 };
 209
 210 enum {
 211         GIF_INVALID             = 0,
 212         GIF_QD_LOCKED           = 1,
 213         GIF_PAGED               = 2,
 214         GIF_SW_PAGED            = 3,
 215 };
 216
 217 struct gfs2_inode {
 218         struct inode i_inode;
 219         struct gfs2_inum_host i_num;
 220
 221         unsigned long i_flags;          /* GIF_... */
 222
 223         struct gfs2_dinode_host i_di; /* To be replaced by ref to block */
 224
 225         struct gfs2_glock *i_gl; /* Move into i_gh? */
 226         struct gfs2_holder i_iopen_gh;
 227         struct gfs2_holder i_gh; /* for prepare/commit_write only */
 228         struct gfs2_alloc i_alloc;
 229         u64 i_last_rg_alloc;
 230
 231         spinlock_t i_spin;
 232         struct rw_semaphore i_rw_mutex;
 233         unsigned long i_last_pfault;
 234
 235         struct buffer_head *i_cache[GFS2_MAX_META_HEIGHT];
 236 };
 237
 238 /*
 239  * Since i_inode is the first element of struct gfs2_inode,
 240  * this is effectively a cast.
 241  */
 242 static inline struct gfs2_inode *GFS2_I(struct inode *inode)
 243 {
 244         return container_of(inode, struct gfs2_inode, i_inode);
 245 }
 246
 247 /* To be removed? */
 248 static inline struct gfs2_sbd *GFS2_SB(struct inode *inode)
 249 {
 250         return inode->i_sb->s_fs_info;
 251 }
 252
 253 enum {
 254         GFF_DID_DIRECT_ALLOC    = 0,
 255         GFF_EXLOCK = 1,
 256 };
 257
 258 struct gfs2_file {
 259         unsigned long f_flags;          /* GFF_... */
 260         struct mutex f_fl_mutex;
 261         struct gfs2_holder f_fl_gh;
 262 };
 263
 264 struct gfs2_revoke {
 265         struct gfs2_log_element rv_le;
 266         u64 rv_blkno;
 267 };
 268
 269 struct gfs2_revoke_replay {
 270         struct list_head rr_list;
 271         u64 rr_blkno;
 272         unsigned int rr_where;
 273 };
 274
 275 enum {
 276         QDF_USER                = 0,
 277         QDF_CHANGE              = 1,
 278         QDF_LOCKED              = 2,
 279 };
 280
 281 struct gfs2_quota_lvb {
 282         __be32 qb_magic;
 283         u32 __pad;
 284         __be64 qb_limit;      /* Hard limit of # blocks to alloc */
 285         __be64 qb_warn;       /* Warn user when alloc is above this # */
 286         __be64 qb_value;       /* Current # blocks allocated */
 287 };
 288
 289 struct gfs2_quota_data {
 290         struct list_head qd_list;
 291         unsigned int qd_count;
 292
 293         u32 qd_id;
 294         unsigned long qd_flags;         /* QDF_... */
 295
 296         s64 qd_change;
 297         s64 qd_change_sync;
 298
 299         unsigned int qd_slot;
 300         unsigned int qd_slot_count;
 301
 302         struct buffer_head *qd_bh;
 303         struct gfs2_quota_change *qd_bh_qc;
 304         unsigned int qd_bh_count;
 305
 306         struct gfs2_glock *qd_gl;
 307         struct gfs2_quota_lvb qd_qb;
 308
 309         u64 qd_sync_gen;
 310         unsigned long qd_last_warn;
 311         unsigned long qd_last_touched;
 312 };
 313
 314 struct gfs2_log_buf {
 315         struct list_head lb_list;
 316         struct buffer_head *lb_bh;
 317         struct buffer_head *lb_real;
 318 };
 319
 320 struct gfs2_trans {
 321         unsigned long tr_ip;
 322
 323         unsigned int tr_blocks;
 324         unsigned int tr_revokes;
 325         unsigned int tr_reserved;
 326
 327         struct gfs2_holder tr_t_gh;
 328
 329         int tr_touched;
 330
 331         unsigned int tr_num_buf;
 332         unsigned int tr_num_buf_new;
 333         unsigned int tr_num_buf_rm;
 334         struct list_head tr_list_buf;
 335
 336         unsigned int tr_num_revoke;
 337         unsigned int tr_num_revoke_rm;
 338 };
 339
 340 struct gfs2_ail {
 341         struct list_head ai_list;
 342
 343         unsigned int ai_first;
 344         struct list_head ai_ail1_list;
 345         struct list_head ai_ail2_list;
 346
 347         u64 ai_sync_gen;
 348 };
 349
 350 struct gfs2_jdesc {
 351         struct list_head jd_list;
 352
 353         struct inode *jd_inode;
 354         unsigned int jd_jid;
 355         int jd_dirty;
 356
 357         unsigned int jd_blocks;
 358 };
 359
 360 #define GFS2_GLOCKD_DEFAULT     1
 361 #define GFS2_GLOCKD_MAX         16
 362
 363 #define GFS2_QUOTA_DEFAULT      GFS2_QUOTA_OFF
 364 #define GFS2_QUOTA_OFF          0
 365 #define GFS2_QUOTA_ACCOUNT      1
 366 #define GFS2_QUOTA_ON           2
 367
 368 #define GFS2_DATA_DEFAULT       GFS2_DATA_ORDERED
 369 #define GFS2_DATA_WRITEBACK     1
 370 #define GFS2_DATA_ORDERED       2
 371
 372 struct gfs2_args {
 373         char ar_lockproto[GFS2_LOCKNAME_LEN]; /* Name of the Lock Protocol */
 374         char ar_locktable[GFS2_LOCKNAME_LEN]; /* Name of the Lock Table */
 375         char ar_hostdata[GFS2_LOCKNAME_LEN]; /* Host specific data */
 376         int ar_spectator; /* Don't get a journal because we're always RO */
 377         int ar_ignore_local_fs; /* Don't optimize even if local_fs is 1 */
 378         int ar_localflocks; /* Let the VFS do flock|fcntl locks for us */
 379         int ar_localcaching; /* Local-style caching (dangerous on multihost) */
 380         int ar_debug; /* Oops on errors instead of trying to be graceful */
 381         int ar_upgrade; /* Upgrade ondisk/multihost format */
 382         unsigned int ar_num_glockd; /* Number of glockd threads */
 383         int ar_posix_acl; /* Enable posix acls */
 384         int ar_quota; /* off/account/on */
 385         int ar_suiddir; /* suiddir support */
 386         int ar_data; /* ordered/writeback */
 387 };
 388
 389 struct gfs2_tune {
 390         spinlock_t gt_spin;
 391
 392         unsigned int gt_ilimit;
 393         unsigned int gt_ilimit_tries;
 394         unsigned int gt_ilimit_min;
 395         unsigned int gt_demote_secs; /* Cache retention for unheld glock */
 396         unsigned int gt_incore_log_blocks;
 397         unsigned int gt_log_flush_secs;
 398         unsigned int gt_jindex_refresh_secs; /* Check for new journal index */
 399
 400         unsigned int gt_scand_secs;
 401         unsigned int gt_recoverd_secs;
 402         unsigned int gt_logd_secs;
 403         unsigned int gt_quotad_secs;
 404
 405         unsigned int gt_quota_simul_sync; /* Max quotavals to sync at once */
 406         unsigned int gt_quota_warn_period; /* Secs between quota warn msgs */
 407         unsigned int gt_quota_scale_num; /* Numerator */
 408         unsigned int gt_quota_scale_den; /* Denominator */
 409         unsigned int gt_quota_cache_secs;
 410         unsigned int gt_quota_quantum; /* Secs between syncs to quota file */
 411         unsigned int gt_atime_quantum; /* Min secs between atime updates */
 412         unsigned int gt_new_files_jdata;
 413         unsigned int gt_new_files_directio;
 414         unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */
 415         unsigned int gt_lockdump_size;
 416         unsigned int gt_stall_secs; /* Detects trouble! */
 417         unsigned int gt_complain_secs;
 418         unsigned int gt_reclaim_limit; /* Max num of glocks in reclaim list */
 419         unsigned int gt_entries_per_readdir;
 420         unsigned int gt_statfs_quantum;
 421         unsigned int gt_statfs_slow;
 422 };
 423
 424 enum {
 425         SDF_JOURNAL_CHECKED     = 0,
 426         SDF_JOURNAL_LIVE        = 1,
 427         SDF_SHUTDOWN            = 2,
 428         SDF_NOATIME             = 3,
 429 };
 430
 431 #define GFS2_FSNAME_LEN         256
 432
 433 struct gfs2_sbd {
 434         struct super_block *sd_vfs;
 435         struct super_block *sd_vfs_meta;
 436         struct kobject sd_kobj;
 437         unsigned long sd_flags; /* SDF_... */
 438         struct gfs2_sb_host sd_sb;
 439
 440         /* Constants computed on mount */
 441
 442         u32 sd_fsb2bb;
 443         u32 sd_fsb2bb_shift;
 444         u32 sd_diptrs;  /* Number of pointers in a dinode */
 445         u32 sd_inptrs;  /* Number of pointers in a indirect block */
 446         u32 sd_jbsize;  /* Size of a journaled data block */
 447         u32 sd_hash_bsize;      /* sizeof(exhash block) */
 448         u32 sd_hash_bsize_shift;
 449         u32 sd_hash_ptrs;       /* Number of pointers in a hash block */
 450         u32 sd_qc_per_block;
 451         u32 sd_max_dirres;      /* Max blocks needed to add a directory entry */
 452         u32 sd_max_height;      /* Max height of a file's metadata tree */
 453         u64 sd_heightsize[GFS2_MAX_META_HEIGHT];
 454         u32 sd_max_jheight; /* Max height of journaled file's meta tree */
 455         u64 sd_jheightsize[GFS2_MAX_META_HEIGHT];
 456
 457         struct gfs2_args sd_args;       /* Mount arguments */
 458         struct gfs2_tune sd_tune;       /* Filesystem tuning structure */
 459
 460         /* Lock Stuff */
 461
 462         struct lm_lockstruct sd_lockstruct;
 463         struct list_head sd_reclaim_list;
 464         spinlock_t sd_reclaim_lock;
 465         wait_queue_head_t sd_reclaim_wq;
 466         atomic_t sd_reclaim_count;
 467         struct gfs2_holder sd_live_gh;
 468         struct gfs2_glock *sd_rename_gl;
 469         struct gfs2_glock *sd_trans_gl;
 470
 471         /* Inode Stuff */
 472
 473         struct inode *sd_master_dir;
 474         struct inode *sd_jindex;
 475         struct inode *sd_inum_inode;
 476         struct inode *sd_statfs_inode;
 477         struct inode *sd_ir_inode;
 478         struct inode *sd_sc_inode;
 479         struct inode *sd_qc_inode;
 480         struct inode *sd_rindex;
 481         struct inode *sd_quota_inode;
 482
 483         /* Inum stuff */
 484
 485         struct mutex sd_inum_mutex;
 486
 487         /* StatFS stuff */
 488
 489         spinlock_t sd_statfs_spin;
 490         struct mutex sd_statfs_mutex;
 491         struct gfs2_statfs_change_host sd_statfs_master;
 492         struct gfs2_statfs_change_host sd_statfs_local;
 493         unsigned long sd_statfs_sync_time;
 494
 495         /* Resource group stuff */
 496
 497         u64 sd_rindex_vn;
 498         spinlock_t sd_rindex_spin;
 499         struct mutex sd_rindex_mutex;
 500         struct list_head sd_rindex_list;
 501         struct list_head sd_rindex_mru_list;
 502         struct list_head sd_rindex_recent_list;
 503         struct gfs2_rgrpd *sd_rindex_forward;
 504         unsigned int sd_rgrps;
 505
 506         /* Journal index stuff */
 507
 508         struct list_head sd_jindex_list;
 509         spinlock_t sd_jindex_spin;
 510         struct mutex sd_jindex_mutex;
 511         unsigned int sd_journals;
 512         unsigned long sd_jindex_refresh_time;
 513
 514         struct gfs2_jdesc *sd_jdesc;
 515         struct gfs2_holder sd_journal_gh;
 516         struct gfs2_holder sd_jinode_gh;
 517
 518         struct gfs2_holder sd_ir_gh;
 519         struct gfs2_holder sd_sc_gh;
 520         struct gfs2_holder sd_qc_gh;
 521
 522         /* Daemon stuff */
 523
 524         struct task_struct *sd_scand_process;
 525         struct task_struct *sd_recoverd_process;
 526         struct task_struct *sd_logd_process;
 527         struct task_struct *sd_quotad_process;
 528         struct task_struct *sd_glockd_process[GFS2_GLOCKD_MAX];
 529         unsigned int sd_glockd_num;
 530
 531         /* Quota stuff */
 532
 533         struct list_head sd_quota_list;
 534         atomic_t sd_quota_count;
 535         spinlock_t sd_quota_spin;
 536         struct mutex sd_quota_mutex;
 537
 538         unsigned int sd_quota_slots;
 539         unsigned int sd_quota_chunks;
 540         unsigned char **sd_quota_bitmap;
 541
 542         u64 sd_quota_sync_gen;
 543         unsigned long sd_quota_sync_time;
 544
 545         /* Log stuff */
 546
 547         spinlock_t sd_log_lock;
 548
 549         unsigned int sd_log_blks_reserved;
 550         unsigned int sd_log_commited_buf;
 551         unsigned int sd_log_commited_revoke;
 552
 553         unsigned int sd_log_num_gl;
 554         unsigned int sd_log_num_buf;
 555         unsigned int sd_log_num_revoke;
 556         unsigned int sd_log_num_rg;
 557         unsigned int sd_log_num_databuf;
 558         unsigned int sd_log_num_jdata;
 559         unsigned int sd_log_num_hdrs;
 560
 561         struct list_head sd_log_le_gl;
 562         struct list_head sd_log_le_buf;
 563         struct list_head sd_log_le_revoke;
 564         struct list_head sd_log_le_rg;
 565         struct list_head sd_log_le_databuf;
 566
 567         unsigned int sd_log_blks_free;
 568         struct mutex sd_log_reserve_mutex;
 569
 570         u64 sd_log_sequence;
 571         unsigned int sd_log_head;
 572         unsigned int sd_log_tail;
 573         int sd_log_idle;
 574
 575         unsigned long sd_log_flush_time;
 576         struct rw_semaphore sd_log_flush_lock;
 577         struct list_head sd_log_flush_list;
 578
 579         unsigned int sd_log_flush_head;
 580         u64 sd_log_flush_wrapped;
 581
 582         struct list_head sd_ail1_list;
 583         struct list_head sd_ail2_list;
 584         u64 sd_ail_sync_gen;
 585
 586         /* Replay stuff */
 587
 588         struct list_head sd_revoke_list;
 589         unsigned int sd_replay_tail;
 590
 591         unsigned int sd_found_blocks;
 592         unsigned int sd_found_revokes;
 593         unsigned int sd_replayed_blocks;
 594
 595         /* For quiescing the filesystem */
 596
 597         struct gfs2_holder sd_freeze_gh;
 598         struct mutex sd_freeze_lock;
 599         unsigned int sd_freeze_count;
 600
 601         /* Counters */
 602
 603         atomic_t sd_glock_count;
 604         atomic_t sd_glock_held_count;
 605         atomic_t sd_inode_count;
 606         atomic_t sd_reclaimed;
 607
 608         char sd_fsname[GFS2_FSNAME_LEN];
 609         char sd_table_name[GFS2_FSNAME_LEN];
 610         char sd_proto_name[GFS2_FSNAME_LEN];
 611
 612         /* Debugging crud */
 613
 614         unsigned long sd_last_warning;
 615         struct vfsmount *sd_gfs2mnt;
 616 };
 617
 618 #endif /* __INCORE_DOT_H__ */
 619