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, unsigned int state, int flags);
 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_sync) (struct gfs2_glock *gl);
 109         void (*go_inval) (struct gfs2_glock *gl, int flags);
 110         int (*go_demote_ok) (struct gfs2_glock *gl);
 111         int (*go_lock) (struct gfs2_holder *gh);
 112         void (*go_unlock) (struct gfs2_holder *gh);
 113         void (*go_callback) (struct gfs2_glock *gl, unsigned int state);
 114         void (*go_greedy) (struct gfs2_glock *gl);
 115         const int go_type;
 116 };
 117
 118 enum {
 119         /* Actions */
 120         HIF_MUTEX               = 0,
 121         HIF_PROMOTE             = 1,
 122         HIF_DEMOTE              = 2,
 123         HIF_GREEDY              = 3,
 124
 125         /* States */
 126         HIF_ALLOCED             = 4,
 127         HIF_DEALLOC             = 5,
 128         HIF_HOLDER              = 6,
 129         HIF_FIRST               = 7,
 130         HIF_ABORTED             = 9,
 131 };
 132
 133 struct gfs2_holder {
 134         struct list_head gh_list;
 135
 136         struct gfs2_glock *gh_gl;
 137         struct task_struct *gh_owner;
 138         unsigned int gh_state;
 139         unsigned gh_flags;
 140
 141         int gh_error;
 142         unsigned long gh_iflags;
 143         struct completion gh_wait;
 144         unsigned long gh_ip;
 145 };
 146
 147 enum {
 148         GLF_LOCK                = 1,
 149         GLF_STICKY              = 2,
 150         GLF_DIRTY               = 5,
 151         GLF_SKIP_WAITERS2       = 6,
 152         GLF_GREEDY              = 7,
 153 };
 154
 155 struct gfs2_glock {
 156         struct hlist_node gl_list;
 157         unsigned long gl_flags;         /* GLF_... */
 158         struct lm_lockname gl_name;
 159         atomic_t gl_ref;
 160
 161         spinlock_t gl_spin;
 162
 163         unsigned int gl_state;
 164         unsigned int gl_hash;
 165         struct task_struct *gl_owner;
 166         unsigned long gl_ip;
 167         struct list_head gl_holders;
 168         struct list_head gl_waiters1;   /* HIF_MUTEX */
 169         struct list_head gl_waiters2;   /* HIF_DEMOTE, HIF_GREEDY */
 170         struct list_head gl_waiters3;   /* HIF_PROMOTE */
 171
 172         const struct gfs2_glock_operations *gl_ops;
 173
 174         struct gfs2_holder *gl_req_gh;
 175         gfs2_glop_bh_t gl_req_bh;
 176
 177         void *gl_lock;
 178         char *gl_lvb;
 179         atomic_t gl_lvb_count;
 180
 181         u64 gl_vn;
 182         unsigned long gl_stamp;
 183         void *gl_object;
 184
 185         struct list_head gl_reclaim;
 186
 187         struct gfs2_sbd *gl_sbd;
 188
 189         struct inode *gl_aspace;
 190         struct gfs2_log_element gl_le;
 191         struct list_head gl_ail_list;
 192         atomic_t gl_ail_count;
 193 };
 194
 195 struct gfs2_alloc {
 196         /* Quota stuff */
 197
 198         struct gfs2_quota_data *al_qd[2*MAXQUOTAS];
 199         struct gfs2_holder al_qd_ghs[2*MAXQUOTAS];
 200         unsigned int al_qd_num;
 201
 202         u32 al_requested; /* Filled in by caller of gfs2_inplace_reserve() */
 203         u32 al_alloced; /* Filled in by gfs2_alloc_*() */
 204
 205         /* Filled in by gfs2_inplace_reserve() */
 206
 207         unsigned int al_line;
 208         char *al_file;
 209         struct gfs2_holder al_ri_gh;
 210         struct gfs2_holder al_rgd_gh;
 211         struct gfs2_rgrpd *al_rgd;
 212
 213 };
 214
 215 enum {
 216         GIF_INVALID             = 0,
 217         GIF_QD_LOCKED           = 1,
 218         GIF_PAGED               = 2,
 219         GIF_SW_PAGED            = 3,
 220 };
 221
 222 struct gfs2_inode {
 223         struct inode i_inode;
 224         struct gfs2_inum_host i_num;
 225
 226         unsigned long i_flags;          /* GIF_... */
 227
 228         struct gfs2_dinode_host i_di; /* To be replaced by ref to block */
 229
 230         struct gfs2_glock *i_gl; /* Move into i_gh? */
 231         struct gfs2_holder i_iopen_gh;
 232         struct gfs2_holder i_gh; /* for prepare/commit_write only */
 233         struct gfs2_alloc i_alloc;
 234         u64 i_last_rg_alloc;
 235
 236         spinlock_t i_spin;
 237         struct rw_semaphore i_rw_mutex;
 238         unsigned int i_greedy;
 239         unsigned long i_last_pfault;
 240
 241         struct buffer_head *i_cache[GFS2_MAX_META_HEIGHT];
 242 };
 243
 244 /*
 245  * Since i_inode is the first element of struct gfs2_inode,
 246  * this is effectively a cast.
 247  */
 248 static inline struct gfs2_inode *GFS2_I(struct inode *inode)
 249 {
 250         return container_of(inode, struct gfs2_inode, i_inode);
 251 }
 252
 253 /* To be removed? */
 254 static inline struct gfs2_sbd *GFS2_SB(struct inode *inode)
 255 {
 256         return inode->i_sb->s_fs_info;
 257 }
 258
 259 enum {
 260         GFF_DID_DIRECT_ALLOC    = 0,
 261         GFF_EXLOCK = 1,
 262 };
 263
 264 struct gfs2_file {
 265         unsigned long f_flags;          /* GFF_... */
 266         struct mutex f_fl_mutex;
 267         struct gfs2_holder f_fl_gh;
 268 };
 269
 270 struct gfs2_revoke {
 271         struct gfs2_log_element rv_le;
 272         u64 rv_blkno;
 273 };
 274
 275 struct gfs2_revoke_replay {
 276         struct list_head rr_list;
 277         u64 rr_blkno;
 278         unsigned int rr_where;
 279 };
 280
 281 enum {
 282         QDF_USER                = 0,
 283         QDF_CHANGE              = 1,
 284         QDF_LOCKED              = 2,
 285 };
 286
 287 struct gfs2_quota_lvb {
 288         __be32 qb_magic;
 289         u32 __pad;
 290         __be64 qb_limit;      /* Hard limit of # blocks to alloc */
 291         __be64 qb_warn;       /* Warn user when alloc is above this # */
 292         __be64 qb_value;       /* Current # blocks allocated */
 293 };
 294
 295 struct gfs2_quota_data {
 296         struct list_head qd_list;
 297         unsigned int qd_count;
 298
 299         u32 qd_id;
 300         unsigned long qd_flags;         /* QDF_... */
 301
 302         s64 qd_change;
 303         s64 qd_change_sync;
 304
 305         unsigned int qd_slot;
 306         unsigned int qd_slot_count;
 307
 308         struct buffer_head *qd_bh;
 309         struct gfs2_quota_change *qd_bh_qc;
 310         unsigned int qd_bh_count;
 311
 312         struct gfs2_glock *qd_gl;
 313         struct gfs2_quota_lvb qd_qb;
 314
 315         u64 qd_sync_gen;
 316         unsigned long qd_last_warn;
 317         unsigned long qd_last_touched;
 318 };
 319
 320 struct gfs2_log_buf {
 321         struct list_head lb_list;
 322         struct buffer_head *lb_bh;
 323         struct buffer_head *lb_real;
 324 };
 325
 326 struct gfs2_trans {
 327         unsigned long tr_ip;
 328
 329         unsigned int tr_blocks;
 330         unsigned int tr_revokes;
 331         unsigned int tr_reserved;
 332
 333         struct gfs2_holder tr_t_gh;
 334
 335         int tr_touched;
 336
 337         unsigned int tr_num_buf;
 338         unsigned int tr_num_buf_new;
 339         unsigned int tr_num_buf_rm;
 340         struct list_head tr_list_buf;
 341
 342         unsigned int tr_num_revoke;
 343         unsigned int tr_num_revoke_rm;
 344 };
 345
 346 struct gfs2_ail {
 347         struct list_head ai_list;
 348
 349         unsigned int ai_first;
 350         struct list_head ai_ail1_list;
 351         struct list_head ai_ail2_list;
 352
 353         u64 ai_sync_gen;
 354 };
 355
 356 struct gfs2_jdesc {
 357         struct list_head jd_list;
 358
 359         struct inode *jd_inode;
 360         unsigned int jd_jid;
 361         int jd_dirty;
 362
 363         unsigned int jd_blocks;
 364 };
 365
 366 #define GFS2_GLOCKD_DEFAULT     1
 367 #define GFS2_GLOCKD_MAX         16
 368
 369 #define GFS2_QUOTA_DEFAULT      GFS2_QUOTA_OFF
 370 #define GFS2_QUOTA_OFF          0
 371 #define GFS2_QUOTA_ACCOUNT      1
 372 #define GFS2_QUOTA_ON           2
 373
 374 #define GFS2_DATA_DEFAULT       GFS2_DATA_ORDERED
 375 #define GFS2_DATA_WRITEBACK     1
 376 #define GFS2_DATA_ORDERED       2
 377
 378 struct gfs2_args {
 379         char ar_lockproto[GFS2_LOCKNAME_LEN]; /* Name of the Lock Protocol */
 380         char ar_locktable[GFS2_LOCKNAME_LEN]; /* Name of the Lock Table */
 381         char ar_hostdata[GFS2_LOCKNAME_LEN]; /* Host specific data */
 382         int ar_spectator; /* Don't get a journal because we're always RO */
 383         int ar_ignore_local_fs; /* Don't optimize even if local_fs is 1 */
 384         int ar_localflocks; /* Let the VFS do flock|fcntl locks for us */
 385         int ar_localcaching; /* Local-style caching (dangerous on multihost) */
 386         int ar_debug; /* Oops on errors instead of trying to be graceful */
 387         int ar_upgrade; /* Upgrade ondisk/multihost format */
 388         unsigned int ar_num_glockd; /* Number of glockd threads */
 389         int ar_posix_acl; /* Enable posix acls */
 390         int ar_quota; /* off/account/on */
 391         int ar_suiddir; /* suiddir support */
 392         int ar_data; /* ordered/writeback */
 393 };
 394
 395 struct gfs2_tune {
 396         spinlock_t gt_spin;
 397
 398         unsigned int gt_ilimit;
 399         unsigned int gt_ilimit_tries;
 400         unsigned int gt_ilimit_min;
 401         unsigned int gt_demote_secs; /* Cache retention for unheld glock */
 402         unsigned int gt_incore_log_blocks;
 403         unsigned int gt_log_flush_secs;
 404         unsigned int gt_jindex_refresh_secs; /* Check for new journal index */
 405
 406         unsigned int gt_scand_secs;
 407         unsigned int gt_recoverd_secs;
 408         unsigned int gt_logd_secs;
 409         unsigned int gt_quotad_secs;
 410
 411         unsigned int gt_quota_simul_sync; /* Max quotavals to sync at once */
 412         unsigned int gt_quota_warn_period; /* Secs between quota warn msgs */
 413         unsigned int gt_quota_scale_num; /* Numerator */
 414         unsigned int gt_quota_scale_den; /* Denominator */
 415         unsigned int gt_quota_cache_secs;
 416         unsigned int gt_quota_quantum; /* Secs between syncs to quota file */
 417         unsigned int gt_atime_quantum; /* Min secs between atime updates */
 418         unsigned int gt_new_files_jdata;
 419         unsigned int gt_new_files_directio;
 420         unsigned int gt_max_atomic_write; /* Split big writes into this size */
 421         unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */
 422         unsigned int gt_lockdump_size;
 423         unsigned int gt_stall_secs; /* Detects trouble! */
 424         unsigned int gt_complain_secs;
 425         unsigned int gt_reclaim_limit; /* Max num of glocks in reclaim list */
 426         unsigned int gt_entries_per_readdir;
 427         unsigned int gt_greedy_default;
 428         unsigned int gt_greedy_quantum;
 429         unsigned int gt_greedy_max;
 430         unsigned int gt_statfs_quantum;
 431         unsigned int gt_statfs_slow;
 432 };
 433
 434 enum {
 435         SDF_JOURNAL_CHECKED     = 0,
 436         SDF_JOURNAL_LIVE        = 1,
 437         SDF_SHUTDOWN            = 2,
 438         SDF_NOATIME             = 3,
 439 };
 440
 441 #define GFS2_FSNAME_LEN         256
 442
 443 struct gfs2_sbd {
 444         struct super_block *sd_vfs;
 445         struct super_block *sd_vfs_meta;
 446         struct kobject sd_kobj;
 447         unsigned long sd_flags; /* SDF_... */
 448         struct gfs2_sb_host sd_sb;
 449
 450         /* Constants computed on mount */
 451
 452         u32 sd_fsb2bb;
 453         u32 sd_fsb2bb_shift;
 454         u32 sd_diptrs;  /* Number of pointers in a dinode */
 455         u32 sd_inptrs;  /* Number of pointers in a indirect block */
 456         u32 sd_jbsize;  /* Size of a journaled data block */
 457         u32 sd_hash_bsize;      /* sizeof(exhash block) */
 458         u32 sd_hash_bsize_shift;
 459         u32 sd_hash_ptrs;       /* Number of pointers in a hash block */
 460         u32 sd_qc_per_block;
 461         u32 sd_max_dirres;      /* Max blocks needed to add a directory entry */
 462         u32 sd_max_height;      /* Max height of a file's metadata tree */
 463         u64 sd_heightsize[GFS2_MAX_META_HEIGHT];
 464         u32 sd_max_jheight; /* Max height of journaled file's meta tree */
 465         u64 sd_jheightsize[GFS2_MAX_META_HEIGHT];
 466
 467         struct gfs2_args sd_args;       /* Mount arguments */
 468         struct gfs2_tune sd_tune;       /* Filesystem tuning structure */
 469
 470         /* Lock Stuff */
 471
 472         struct lm_lockstruct sd_lockstruct;
 473         struct list_head sd_reclaim_list;
 474         spinlock_t sd_reclaim_lock;
 475         wait_queue_head_t sd_reclaim_wq;
 476         atomic_t sd_reclaim_count;
 477         struct gfs2_holder sd_live_gh;
 478         struct gfs2_glock *sd_rename_gl;
 479         struct gfs2_glock *sd_trans_gl;
 480
 481         /* Inode Stuff */
 482
 483         struct inode *sd_master_dir;
 484         struct inode *sd_jindex;
 485         struct inode *sd_inum_inode;
 486         struct inode *sd_statfs_inode;
 487         struct inode *sd_ir_inode;
 488         struct inode *sd_sc_inode;
 489         struct inode *sd_qc_inode;
 490         struct inode *sd_rindex;
 491         struct inode *sd_quota_inode;
 492
 493         /* Inum stuff */
 494
 495         struct mutex sd_inum_mutex;
 496
 497         /* StatFS stuff */
 498
 499         spinlock_t sd_statfs_spin;
 500         struct mutex sd_statfs_mutex;
 501         struct gfs2_statfs_change_host sd_statfs_master;
 502         struct gfs2_statfs_change_host sd_statfs_local;
 503         unsigned long sd_statfs_sync_time;
 504
 505         /* Resource group stuff */
 506
 507         u64 sd_rindex_vn;
 508         spinlock_t sd_rindex_spin;
 509         struct mutex sd_rindex_mutex;
 510         struct list_head sd_rindex_list;
 511         struct list_head sd_rindex_mru_list;
 512         struct list_head sd_rindex_recent_list;
 513         struct gfs2_rgrpd *sd_rindex_forward;
 514         unsigned int sd_rgrps;
 515
 516         /* Journal index stuff */
 517
 518         struct list_head sd_jindex_list;
 519         spinlock_t sd_jindex_spin;
 520         struct mutex sd_jindex_mutex;
 521         unsigned int sd_journals;
 522         unsigned long sd_jindex_refresh_time;
 523
 524         struct gfs2_jdesc *sd_jdesc;
 525         struct gfs2_holder sd_journal_gh;
 526         struct gfs2_holder sd_jinode_gh;
 527
 528         struct gfs2_holder sd_ir_gh;
 529         struct gfs2_holder sd_sc_gh;
 530         struct gfs2_holder sd_qc_gh;
 531
 532         /* Daemon stuff */
 533
 534         struct task_struct *sd_scand_process;
 535         struct task_struct *sd_recoverd_process;
 536         struct task_struct *sd_logd_process;
 537         struct task_struct *sd_quotad_process;
 538         struct task_struct *sd_glockd_process[GFS2_GLOCKD_MAX];
 539         unsigned int sd_glockd_num;
 540
 541         /* Quota stuff */
 542
 543         struct list_head sd_quota_list;
 544         atomic_t sd_quota_count;
 545         spinlock_t sd_quota_spin;
 546         struct mutex sd_quota_mutex;
 547
 548         unsigned int sd_quota_slots;
 549         unsigned int sd_quota_chunks;
 550         unsigned char **sd_quota_bitmap;
 551
 552         u64 sd_quota_sync_gen;
 553         unsigned long sd_quota_sync_time;
 554
 555         /* Log stuff */
 556
 557         spinlock_t sd_log_lock;
 558
 559         unsigned int sd_log_blks_reserved;
 560         unsigned int sd_log_commited_buf;
 561         unsigned int sd_log_commited_revoke;
 562
 563         unsigned int sd_log_num_gl;
 564         unsigned int sd_log_num_buf;
 565         unsigned int sd_log_num_revoke;
 566         unsigned int sd_log_num_rg;
 567         unsigned int sd_log_num_databuf;
 568         unsigned int sd_log_num_jdata;
 569         unsigned int sd_log_num_hdrs;
 570
 571         struct list_head sd_log_le_gl;
 572         struct list_head sd_log_le_buf;
 573         struct list_head sd_log_le_revoke;
 574         struct list_head sd_log_le_rg;
 575         struct list_head sd_log_le_databuf;
 576
 577         unsigned int sd_log_blks_free;
 578         struct mutex sd_log_reserve_mutex;
 579
 580         u64 sd_log_sequence;
 581         unsigned int sd_log_head;
 582         unsigned int sd_log_tail;
 583         int sd_log_idle;
 584
 585         unsigned long sd_log_flush_time;
 586         struct rw_semaphore sd_log_flush_lock;
 587         struct list_head sd_log_flush_list;
 588
 589         unsigned int sd_log_flush_head;
 590         u64 sd_log_flush_wrapped;
 591
 592         struct list_head sd_ail1_list;
 593         struct list_head sd_ail2_list;
 594         u64 sd_ail_sync_gen;
 595
 596         /* Replay stuff */
 597
 598         struct list_head sd_revoke_list;
 599         unsigned int sd_replay_tail;
 600
 601         unsigned int sd_found_blocks;
 602         unsigned int sd_found_revokes;
 603         unsigned int sd_replayed_blocks;
 604
 605         /* For quiescing the filesystem */
 606
 607         struct gfs2_holder sd_freeze_gh;
 608         struct mutex sd_freeze_lock;
 609         unsigned int sd_freeze_count;
 610
 611         /* Counters */
 612
 613         atomic_t sd_glock_count;
 614         atomic_t sd_glock_held_count;
 615         atomic_t sd_inode_count;
 616         atomic_t sd_reclaimed;
 617
 618         char sd_fsname[GFS2_FSNAME_LEN];
 619         char sd_table_name[GFS2_FSNAME_LEN];
 620         char sd_proto_name[GFS2_FSNAME_LEN];
 621
 622         /* Debugging crud */
 623
 624         unsigned long sd_last_warning;
 625         struct vfsmount *sd_gfs2mnt;
 626 };
 627
 628 #endif /* __INCORE_DOT_H__ */
 629