fs/gfs2/incore.h

   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/workqueue.h>
  15
  16 #define DIO_WAIT        0x00000010
  17 #define DIO_METADATA    0x00000020
  18 #define DIO_ALL         0x00000100
  19
  20 struct gfs2_log_operations;
  21 struct gfs2_log_element;
  22 struct gfs2_holder;
  23 struct gfs2_glock;
  24 struct gfs2_quota_data;
  25 struct gfs2_trans;
  26 struct gfs2_ail;
  27 struct gfs2_jdesc;
  28 struct gfs2_sbd;
  29
  30 typedef void (*gfs2_glop_bh_t) (struct gfs2_glock *gl, unsigned int ret);
  31
  32 struct gfs2_log_header_host {
  33         u64 lh_sequence;        /* Sequence number of this transaction */
  34         u32 lh_flags;           /* GFS2_LOG_HEAD_... */
  35         u32 lh_tail;            /* Block number of log tail */
  36         u32 lh_blkno;
  37         u32 lh_hash;
  38 };
  39
  40 /*
  41  * Structure of operations that are associated with each
  42  * type of element in the log.
  43  */
  44
  45 struct gfs2_log_operations {
  46         void (*lo_add) (struct gfs2_sbd *sdp, struct gfs2_log_element *le);
  47         void (*lo_before_commit) (struct gfs2_sbd *sdp);
  48         void (*lo_after_commit) (struct gfs2_sbd *sdp, struct gfs2_ail *ai);
  49         void (*lo_before_scan) (struct gfs2_jdesc *jd,
  50                                 struct gfs2_log_header_host *head, int pass);
  51         int (*lo_scan_elements) (struct gfs2_jdesc *jd, unsigned int start,
  52                                  struct gfs2_log_descriptor *ld, __be64 *ptr,
  53                                  int pass);
  54         void (*lo_after_scan) (struct gfs2_jdesc *jd, int error, int pass);
  55         const char *lo_name;
  56 };
  57
  58 struct gfs2_log_element {
  59         struct list_head le_list;
  60         const struct gfs2_log_operations *le_ops;
  61 };
  62
  63 struct gfs2_bitmap {
  64         struct buffer_head *bi_bh;
  65         char *bi_clone;
  66         u32 bi_offset;
  67         u32 bi_start;
  68         u32 bi_len;
  69 };
  70
  71 struct gfs2_rgrpd {
  72         struct list_head rd_list;       /* Link with superblock */
  73         struct list_head rd_list_mru;
  74         struct gfs2_glock *rd_gl;       /* Glock for this rgrp */
  75         u64 rd_addr;                    /* grp block disk address */
  76         u64 rd_data0;                   /* first data location */
  77         u32 rd_length;                  /* length of rgrp header in fs blocks */
  78         u32 rd_data;                    /* num of data blocks in rgrp */
  79         u32 rd_bitbytes;                /* number of bytes in data bitmaps */
  80         u32 rd_free;
  81         u32 rd_free_clone;
  82         u32 rd_dinodes;
  83         u64 rd_igeneration;
  84         struct gfs2_bitmap *rd_bits;
  85         struct mutex rd_mutex;
  86         struct gfs2_log_element rd_le;
  87         struct gfs2_sbd *rd_sbd;
  88         unsigned int rd_bh_count;
  89         u32 rd_last_alloc;
  90         unsigned char rd_flags;
  91 #define GFS2_RDF_CHECK        0x01      /* Need to check for unlinked inodes */
  92 #define GFS2_RDF_NOALLOC      0x02      /* rg prohibits allocation */
  93 #define GFS2_RDF_UPTODATE     0x04      /* rg is up to date */
  94 };
  95
  96 enum gfs2_state_bits {
  97         BH_Pinned = BH_PrivateStart,
  98         BH_Escaped = BH_PrivateStart + 1,
  99 };
 100
 101 BUFFER_FNS(Pinned, pinned)
 102 TAS_BUFFER_FNS(Pinned, pinned)
 103 BUFFER_FNS(Escaped, escaped)
 104 TAS_BUFFER_FNS(Escaped, escaped)
 105
 106 struct gfs2_bufdata {
 107         struct buffer_head *bd_bh;
 108         struct gfs2_glock *bd_gl;
 109
 110         union {
 111                 struct list_head list_tr;
 112                 u64 blkno;
 113         } u;
 114 #define bd_list_tr u.list_tr
 115 #define bd_blkno u.blkno
 116
 117         struct gfs2_log_element bd_le;
 118
 119         struct gfs2_ail *bd_ail;
 120         struct list_head bd_ail_st_list;
 121         struct list_head bd_ail_gl_list;
 122 };
 123
 124 struct gfs2_glock_operations {
 125         void (*go_xmote_th) (struct gfs2_glock *gl);
 126         int (*go_xmote_bh) (struct gfs2_glock *gl, struct gfs2_holder *gh);
 127         void (*go_inval) (struct gfs2_glock *gl, int flags);
 128         int (*go_demote_ok) (const struct gfs2_glock *gl);
 129         int (*go_lock) (struct gfs2_holder *gh);
 130         void (*go_unlock) (struct gfs2_holder *gh);
 131         int (*go_dump)(struct seq_file *seq, const struct gfs2_glock *gl);
 132         const int go_type;
 133         const unsigned long go_min_hold_time;
 134 };
 135
 136 enum {
 137         /* States */
 138         HIF_HOLDER              = 6,  /* Set for gh that "holds" the glock */
 139         HIF_FIRST               = 7,
 140         HIF_WAIT                = 10,
 141 };
 142
 143 struct gfs2_holder {
 144         struct list_head gh_list;
 145
 146         struct gfs2_glock *gh_gl;
 147         struct pid *gh_owner_pid;
 148         unsigned int gh_state;
 149         unsigned gh_flags;
 150
 151         int gh_error;
 152         unsigned long gh_iflags; /* HIF_... */
 153         unsigned long gh_ip;
 154 };
 155
 156 enum {
 157         GLF_LOCK                        = 1,
 158         GLF_DEMOTE                      = 3,
 159         GLF_PENDING_DEMOTE              = 4,
 160         GLF_DEMOTE_IN_PROGRESS          = 5,
 161         GLF_DIRTY                       = 6,
 162         GLF_LFLUSH                      = 7,
 163         GLF_INVALIDATE_IN_PROGRESS      = 8,
 164         GLF_REPLY_PENDING               = 9,
 165 };
 166
 167 struct gfs2_glock {
 168         struct hlist_node gl_list;
 169         unsigned long gl_flags;         /* GLF_... */
 170         struct lm_lockname gl_name;
 171         atomic_t gl_ref;
 172
 173         spinlock_t gl_spin;
 174
 175         unsigned int gl_state;
 176         unsigned int gl_target;
 177         unsigned int gl_reply;
 178         unsigned int gl_hash;
 179         unsigned int gl_demote_state; /* state requested by remote node */
 180         unsigned long gl_demote_time; /* time of first demote request */
 181         struct list_head gl_holders;
 182
 183         const struct gfs2_glock_operations *gl_ops;
 184         void *gl_lock;
 185         char *gl_lvb;
 186         atomic_t gl_lvb_count;
 187
 188         unsigned long gl_stamp;
 189         unsigned long gl_tchange;
 190         void *gl_object;
 191
 192         struct list_head gl_lru;
 193
 194         struct gfs2_sbd *gl_sbd;
 195
 196         struct inode *gl_aspace;
 197         struct list_head gl_ail_list;
 198         atomic_t gl_ail_count;
 199         struct delayed_work gl_work;
 200 };
 201
 202 #define GFS2_MIN_LVB_SIZE 32    /* Min size of LVB that gfs2 supports */
 203
 204 struct gfs2_alloc {
 205         /* Quota stuff */
 206
 207         struct gfs2_quota_data *al_qd[2*MAXQUOTAS];
 208         struct gfs2_holder al_qd_ghs[2*MAXQUOTAS];
 209         unsigned int al_qd_num;
 210
 211         u32 al_requested; /* Filled in by caller of gfs2_inplace_reserve() */
 212         u32 al_alloced; /* Filled in by gfs2_alloc_*() */
 213
 214         /* Filled in by gfs2_inplace_reserve() */
 215
 216         unsigned int al_line;
 217         char *al_file;
 218         struct gfs2_holder al_ri_gh;
 219         struct gfs2_holder al_rgd_gh;
 220         struct gfs2_rgrpd *al_rgd;
 221
 222 };
 223
 224 enum {
 225         GIF_INVALID             = 0,
 226         GIF_QD_LOCKED           = 1,
 227         GIF_SW_PAGED            = 3,
 228         GIF_USER                = 4, /* user inode, not metadata addr space */
 229 };
 230
 231
 232 struct gfs2_inode {
 233         struct inode i_inode;
 234         u64 i_no_addr;
 235         u64 i_no_formal_ino;
 236         u64 i_generation;
 237         u64 i_eattr;
 238         loff_t i_disksize;
 239         unsigned long i_flags;          /* GIF_... */
 240         struct gfs2_glock *i_gl; /* Move into i_gh? */
 241         struct gfs2_holder i_iopen_gh;
 242         struct gfs2_holder i_gh; /* for prepare/commit_write only */
 243         struct gfs2_alloc *i_alloc;
 244         u64 i_goal;     /* goal block for allocations */
 245         struct rw_semaphore i_rw_mutex;
 246         struct list_head i_trunc_list;
 247         u32 i_entries;
 248         u32 i_diskflags;
 249         u8 i_height;
 250         u8 i_depth;
 251 };
 252
 253 /*
 254  * Since i_inode is the first element of struct gfs2_inode,
 255  * this is effectively a cast.
 256  */
 257 static inline struct gfs2_inode *GFS2_I(struct inode *inode)
 258 {
 259         return container_of(inode, struct gfs2_inode, i_inode);
 260 }
 261
 262 static inline struct gfs2_sbd *GFS2_SB(const struct inode *inode)
 263 {
 264         return inode->i_sb->s_fs_info;
 265 }
 266
 267 struct gfs2_file {
 268         struct mutex f_fl_mutex;
 269         struct gfs2_holder f_fl_gh;
 270 };
 271
 272 struct gfs2_revoke_replay {
 273         struct list_head rr_list;
 274         u64 rr_blkno;
 275         unsigned int rr_where;
 276 };
 277
 278 enum {
 279         QDF_USER                = 0,
 280         QDF_CHANGE              = 1,
 281         QDF_LOCKED              = 2,
 282 };
 283
 284 struct gfs2_quota_data {
 285         struct list_head qd_list;
 286         unsigned int qd_count;
 287
 288         u32 qd_id;
 289         unsigned long qd_flags;         /* QDF_... */
 290
 291         s64 qd_change;
 292         s64 qd_change_sync;
 293
 294         unsigned int qd_slot;
 295         unsigned int qd_slot_count;
 296
 297         struct buffer_head *qd_bh;
 298         struct gfs2_quota_change *qd_bh_qc;
 299         unsigned int qd_bh_count;
 300
 301         struct gfs2_glock *qd_gl;
 302         struct gfs2_quota_lvb qd_qb;
 303
 304         u64 qd_sync_gen;
 305         unsigned long qd_last_warn;
 306         unsigned long qd_last_touched;
 307 };
 308
 309 struct gfs2_trans {
 310         unsigned long tr_ip;
 311
 312         unsigned int tr_blocks;
 313         unsigned int tr_revokes;
 314         unsigned int tr_reserved;
 315
 316         struct gfs2_holder tr_t_gh;
 317
 318         int tr_touched;
 319
 320         unsigned int tr_num_buf;
 321         unsigned int tr_num_buf_new;
 322         unsigned int tr_num_databuf_new;
 323         unsigned int tr_num_buf_rm;
 324         unsigned int tr_num_databuf_rm;
 325         struct list_head tr_list_buf;
 326
 327         unsigned int tr_num_revoke;
 328         unsigned int tr_num_revoke_rm;
 329 };
 330
 331 struct gfs2_ail {
 332         struct list_head ai_list;
 333
 334         unsigned int ai_first;
 335         struct list_head ai_ail1_list;
 336         struct list_head ai_ail2_list;
 337
 338         u64 ai_sync_gen;
 339 };
 340
 341 struct gfs2_journal_extent {
 342         struct list_head extent_list;
 343
 344         unsigned int lblock; /* First logical block */
 345         u64 dblock; /* First disk block */
 346         u64 blocks;
 347 };
 348
 349 struct gfs2_jdesc {
 350         struct list_head jd_list;
 351         struct list_head extent_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 struct gfs2_statfs_change_host {
 361         s64 sc_total;
 362         s64 sc_free;
 363         s64 sc_dinodes;
 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         unsigned int ar_spectator:1;            /* Don't get a journal */
 383         unsigned int ar_ignore_local_fs:1;      /* Ignore optimisations */
 384         unsigned int ar_localflocks:1;          /* Let the VFS do flock|fcntl */
 385         unsigned int ar_localcaching:1;         /* Local caching */
 386         unsigned int ar_debug:1;                /* Oops on errors */
 387         unsigned int ar_upgrade:1;              /* Upgrade ondisk format */
 388         unsigned int ar_posix_acl:1;            /* Enable posix acls */
 389         unsigned int ar_quota:2;                /* off/account/on */
 390         unsigned int ar_suiddir:1;              /* suiddir support */
 391         unsigned int ar_data:2;                 /* ordered/writeback */
 392         unsigned int ar_meta:1;                 /* mount metafs */
 393         unsigned int ar_num_glockd;             /* Number of glockd threads */
 394 };
 395
 396 struct gfs2_tune {
 397         spinlock_t gt_spin;
 398
 399         unsigned int gt_incore_log_blocks;
 400         unsigned int gt_log_flush_secs;
 401
 402         unsigned int gt_recoverd_secs;
 403         unsigned int gt_logd_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_new_files_jdata;
 412         unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */
 413         unsigned int gt_stall_secs; /* Detects trouble! */
 414         unsigned int gt_complain_secs;
 415         unsigned int gt_statfs_quantum;
 416         unsigned int gt_statfs_slow;
 417 };
 418
 419 enum {
 420         SDF_JOURNAL_CHECKED     = 0,
 421         SDF_JOURNAL_LIVE        = 1,
 422         SDF_SHUTDOWN            = 2,
 423         SDF_NOBARRIERS          = 3,
 424 };
 425
 426 #define GFS2_FSNAME_LEN         256
 427
 428 struct gfs2_inum_host {
 429         u64 no_formal_ino;
 430         u64 no_addr;
 431 };
 432
 433 struct gfs2_sb_host {
 434         u32 sb_magic;
 435         u32 sb_type;
 436         u32 sb_format;
 437
 438         u32 sb_fs_format;
 439         u32 sb_multihost_format;
 440         u32 sb_bsize;
 441         u32 sb_bsize_shift;
 442
 443         struct gfs2_inum_host sb_master_dir;
 444         struct gfs2_inum_host sb_root_dir;
 445
 446         char sb_lockproto[GFS2_LOCKNAME_LEN];
 447         char sb_locktable[GFS2_LOCKNAME_LEN];
 448 };
 449
 450 struct gfs2_sbd {
 451         struct super_block *sd_vfs;
 452         struct kobject sd_kobj;
 453         unsigned long sd_flags; /* SDF_... */
 454         struct gfs2_sb_host sd_sb;
 455
 456         /* Constants computed on mount */
 457
 458         u32 sd_fsb2bb;
 459         u32 sd_fsb2bb_shift;
 460         u32 sd_diptrs;  /* Number of pointers in a dinode */
 461         u32 sd_inptrs;  /* Number of pointers in a indirect block */
 462         u32 sd_jbsize;  /* Size of a journaled data block */
 463         u32 sd_hash_bsize;      /* sizeof(exhash block) */
 464         u32 sd_hash_bsize_shift;
 465         u32 sd_hash_ptrs;       /* Number of pointers in a hash block */
 466         u32 sd_qc_per_block;
 467         u32 sd_max_dirres;      /* Max blocks needed to add a directory entry */
 468         u32 sd_max_height;      /* Max height of a file's metadata tree */
 469         u64 sd_heightsize[GFS2_MAX_META_HEIGHT + 1];
 470         u32 sd_max_jheight; /* Max height of journaled file's meta tree */
 471         u64 sd_jheightsize[GFS2_MAX_META_HEIGHT + 1];
 472
 473         struct gfs2_args sd_args;       /* Mount arguments */
 474         struct gfs2_tune sd_tune;       /* Filesystem tuning structure */
 475
 476         /* Lock Stuff */
 477
 478         struct lm_lockstruct sd_lockstruct;
 479         struct gfs2_holder sd_live_gh;
 480         struct gfs2_glock *sd_rename_gl;
 481         struct gfs2_glock *sd_trans_gl;
 482
 483         /* Inode Stuff */
 484
 485         struct dentry *sd_master_dir;
 486         struct dentry *sd_root_dir;
 487
 488         struct inode *sd_jindex;
 489         struct inode *sd_inum_inode;
 490         struct inode *sd_statfs_inode;
 491         struct inode *sd_ir_inode;
 492         struct inode *sd_sc_inode;
 493         struct inode *sd_qc_inode;
 494         struct inode *sd_rindex;
 495         struct inode *sd_quota_inode;
 496
 497         /* Inum stuff */
 498
 499         struct mutex sd_inum_mutex;
 500
 501         /* StatFS stuff */
 502
 503         spinlock_t sd_statfs_spin;
 504         struct gfs2_statfs_change_host sd_statfs_master;
 505         struct gfs2_statfs_change_host sd_statfs_local;
 506
 507         /* Resource group stuff */
 508
 509         int sd_rindex_uptodate;
 510         spinlock_t sd_rindex_spin;
 511         struct mutex sd_rindex_mutex;
 512         struct list_head sd_rindex_list;
 513         struct list_head sd_rindex_mru_list;
 514         struct gfs2_rgrpd *sd_rindex_forward;
 515         unsigned int sd_rgrps;
 516
 517         /* Journal index stuff */
 518
 519         struct list_head sd_jindex_list;
 520         spinlock_t sd_jindex_spin;
 521         struct mutex sd_jindex_mutex;
 522         unsigned int sd_journals;
 523         unsigned long sd_jindex_refresh_time;
 524
 525         struct gfs2_jdesc *sd_jdesc;
 526         struct gfs2_holder sd_journal_gh;
 527         struct gfs2_holder sd_jinode_gh;
 528
 529         struct gfs2_holder sd_ir_gh;
 530         struct gfs2_holder sd_sc_gh;
 531         struct gfs2_holder sd_qc_gh;
 532
 533         /* Daemon stuff */
 534
 535         struct task_struct *sd_recoverd_process;
 536         struct task_struct *sd_logd_process;
 537         struct task_struct *sd_quotad_process;
 538
 539         /* Quota stuff */
 540
 541         struct list_head sd_quota_list;
 542         atomic_t sd_quota_count;
 543         spinlock_t sd_quota_spin;
 544         struct mutex sd_quota_mutex;
 545         wait_queue_head_t sd_quota_wait;
 546         struct list_head sd_trunc_list;
 547         spinlock_t sd_trunc_lock;
 548
 549         unsigned int sd_quota_slots;
 550         unsigned int sd_quota_chunks;
 551         unsigned char **sd_quota_bitmap;
 552
 553         u64 sd_quota_sync_gen;
 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_databuf;
 562         unsigned int sd_log_commited_revoke;
 563
 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
 569         struct list_head sd_log_le_buf;
 570         struct list_head sd_log_le_revoke;
 571         struct list_head sd_log_le_rg;
 572         struct list_head sd_log_le_databuf;
 573         struct list_head sd_log_le_ordered;
 574
 575         atomic_t sd_log_blks_free;
 576         struct mutex sd_log_reserve_mutex;
 577
 578         u64 sd_log_sequence;
 579         unsigned int sd_log_head;
 580         unsigned int sd_log_tail;
 581         int sd_log_idle;
 582
 583         unsigned long sd_log_flush_time;
 584         struct rw_semaphore sd_log_flush_lock;
 585         atomic_t sd_log_in_flight;
 586         wait_queue_head_t sd_log_flush_wait;
 587
 588         unsigned int sd_log_flush_head;
 589         u64 sd_log_flush_wrapped;
 590
 591         struct list_head sd_ail1_list;
 592         struct list_head sd_ail2_list;
 593         u64 sd_ail_sync_gen;
 594
 595         /* Replay stuff */
 596
 597         struct list_head sd_revoke_list;
 598         unsigned int sd_replay_tail;
 599
 600         unsigned int sd_found_blocks;
 601         unsigned int sd_found_revokes;
 602         unsigned int sd_replayed_blocks;
 603
 604         /* For quiescing the filesystem */
 605
 606         struct gfs2_holder sd_freeze_gh;
 607         struct mutex sd_freeze_lock;
 608         unsigned int sd_freeze_count;
 609
 610         char sd_fsname[GFS2_FSNAME_LEN];
 611         char sd_table_name[GFS2_FSNAME_LEN];
 612         char sd_proto_name[GFS2_FSNAME_LEN];
 613
 614         /* Debugging crud */
 615
 616         unsigned long sd_last_warning;
 617         struct dentry *debugfs_dir;    /* debugfs directory */
 618         struct dentry *debugfs_dentry_glocks; /* for debugfs */
 619 };
 620
 621 #endif /* __INCORE_DOT_H__ */
 622