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