fs/gfs2/incore.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
   4  * Copyright (C) 2004-2008 Red Hat, Inc.  All rights reserved.
   5  */
   6
   7 #ifndef __INCORE_DOT_H__
   8 #define __INCORE_DOT_H__
   9
  10 #include <linux/fs.h>
  11 #include <linux/kobject.h>
  12 #include <linux/workqueue.h>
  13 #include <linux/dlm.h>
  14 #include <linux/buffer_head.h>
  15 #include <linux/rcupdate.h>
  16 #include <linux/rculist_bl.h>
  17 #include <linux/completion.h>
  18 #include <linux/rbtree.h>
  19 #include <linux/ktime.h>
  20 #include <linux/percpu.h>
  21 #include <linux/lockref.h>
  22 #include <linux/rhashtable.h>
  23
  24 #define DIO_WAIT        0x00000010
  25 #define DIO_METADATA    0x00000020
  26
  27 struct gfs2_log_operations;
  28 struct gfs2_bufdata;
  29 struct gfs2_holder;
  30 struct gfs2_glock;
  31 struct gfs2_quota_data;
  32 struct gfs2_trans;
  33 struct gfs2_jdesc;
  34 struct gfs2_sbd;
  35 struct lm_lockops;
  36
  37 typedef void (*gfs2_glop_bh_t) (struct gfs2_glock *gl, unsigned int ret);
  38
  39 struct gfs2_log_header_host {
  40         u64 lh_sequence;        /* Sequence number of this transaction */
  41         u32 lh_flags;           /* GFS2_LOG_HEAD_... */
  42         u32 lh_tail;            /* Block number of log tail */
  43         u32 lh_blkno;
  44 };
  45
  46 /*
  47  * Structure of operations that are associated with each
  48  * type of element in the log.
  49  */
  50
  51 struct gfs2_log_operations {
  52         void (*lo_before_commit) (struct gfs2_sbd *sdp, struct gfs2_trans *tr);
  53         void (*lo_after_commit) (struct gfs2_sbd *sdp, struct gfs2_trans *tr);
  54         void (*lo_before_scan) (struct gfs2_jdesc *jd,
  55                                 struct gfs2_log_header_host *head, int pass);
  56         int (*lo_scan_elements) (struct gfs2_jdesc *jd, unsigned int start,
  57                                  struct gfs2_log_descriptor *ld, __be64 *ptr,
  58                                  int pass);
  59         void (*lo_after_scan) (struct gfs2_jdesc *jd, int error, int pass);
  60         const char *lo_name;
  61 };
  62
  63 #define GBF_FULL 1
  64
  65 /**
  66  * Clone bitmaps (bi_clone):
  67  *
  68  * - When a block is freed, we remember the previous state of the block in the
  69  *   clone bitmap, and only mark the block as free in the real bitmap.
  70  *
  71  * - When looking for a block to allocate, we check for a free block in the
  72  *   clone bitmap, and if no clone bitmap exists, in the real bitmap.
  73  *
  74  * - For allocating a block, we mark it as allocated in the real bitmap, and if
  75  *   a clone bitmap exists, also in the clone bitmap.
  76  *
  77  * - At the end of a log_flush, we copy the real bitmap into the clone bitmap
  78  *   to make the clone bitmap reflect the current allocation state.
  79  *   (Alternatively, we could remove the clone bitmap.)
  80  *
  81  * The clone bitmaps are in-core only, and is never written to disk.
  82  *
  83  * These steps ensure that blocks which have been freed in a transaction cannot
  84  * be reallocated in that same transaction.
  85  */
  86 struct gfs2_bitmap {
  87         struct buffer_head *bi_bh;
  88         char *bi_clone;
  89         unsigned long bi_flags;
  90         u32 bi_offset;
  91         u32 bi_start;
  92         u32 bi_bytes;
  93         u32 bi_blocks;
  94 };
  95
  96 struct gfs2_rgrpd {
  97         struct rb_node rd_node;         /* Link with superblock */
  98         struct gfs2_glock *rd_gl;       /* Glock for this rgrp */
  99         u64 rd_addr;                    /* grp block disk address */
 100         u64 rd_data0;                   /* first data location */
 101         u32 rd_length;                  /* length of rgrp header in fs blocks */
 102         u32 rd_data;                    /* num of data blocks in rgrp */
 103         u32 rd_bitbytes;                /* number of bytes in data bitmaps */
 104         u32 rd_free;
 105         u32 rd_reserved;                /* number of blocks reserved */
 106         u32 rd_free_clone;
 107         u32 rd_dinodes;
 108         u64 rd_igeneration;
 109         struct gfs2_bitmap *rd_bits;
 110         struct gfs2_sbd *rd_sbd;
 111         struct gfs2_rgrp_lvb *rd_rgl;
 112         u32 rd_last_alloc;
 113         u32 rd_flags;
 114         u32 rd_extfail_pt;              /* extent failure point */
 115 #define GFS2_RDF_CHECK          0x10000000 /* check for unlinked inodes */
 116 #define GFS2_RDF_UPTODATE       0x20000000 /* rg is up to date */
 117 #define GFS2_RDF_ERROR          0x40000000 /* error in rg */
 118 #define GFS2_RDF_PREFERRED      0x80000000 /* This rgrp is preferred */
 119 #define GFS2_RDF_MASK           0xf0000000 /* mask for internal flags */
 120         spinlock_t rd_rsspin;           /* protects reservation related vars */
 121         struct rb_root rd_rstree;       /* multi-block reservation tree */
 122 };
 123
 124 struct gfs2_rbm {
 125         struct gfs2_rgrpd *rgd;
 126         u32 offset;             /* The offset is bitmap relative */
 127         int bii;                /* Bitmap index */
 128 };
 129
 130 static inline struct gfs2_bitmap *rbm_bi(const struct gfs2_rbm *rbm)
 131 {
 132         return rbm->rgd->rd_bits + rbm->bii;
 133 }
 134
 135 static inline u64 gfs2_rbm_to_block(const struct gfs2_rbm *rbm)
 136 {
 137         BUG_ON(rbm->offset >= rbm->rgd->rd_data);
 138         return rbm->rgd->rd_data0 + (rbm_bi(rbm)->bi_start * GFS2_NBBY) +
 139                 rbm->offset;
 140 }
 141
 142 static inline bool gfs2_rbm_eq(const struct gfs2_rbm *rbm1,
 143                                const struct gfs2_rbm *rbm2)
 144 {
 145         return (rbm1->rgd == rbm2->rgd) && (rbm1->bii == rbm2->bii) &&
 146                (rbm1->offset == rbm2->offset);
 147 }
 148
 149 enum gfs2_state_bits {
 150         BH_Pinned = BH_PrivateStart,
 151         BH_Escaped = BH_PrivateStart + 1,
 152 };
 153
 154 BUFFER_FNS(Pinned, pinned)
 155 TAS_BUFFER_FNS(Pinned, pinned)
 156 BUFFER_FNS(Escaped, escaped)
 157 TAS_BUFFER_FNS(Escaped, escaped)
 158
 159 struct gfs2_bufdata {
 160         struct buffer_head *bd_bh;
 161         struct gfs2_glock *bd_gl;
 162         u64 bd_blkno;
 163
 164         struct list_head bd_list;
 165
 166         struct gfs2_trans *bd_tr;
 167         struct list_head bd_ail_st_list;
 168         struct list_head bd_ail_gl_list;
 169 };
 170
 171 /*
 172  * Internally, we prefix things with gdlm_ and GDLM_ (for gfs-dlm) since a
 173  * prefix of lock_dlm_ gets awkward.
 174  */
 175
 176 #define GDLM_STRNAME_BYTES      25
 177 #define GDLM_LVB_SIZE           32
 178
 179 /*
 180  * ls_recover_flags:
 181  *
 182  * DFL_BLOCK_LOCKS: dlm is in recovery and will grant locks that had been
 183  * held by failed nodes whose journals need recovery.  Those locks should
 184  * only be used for journal recovery until the journal recovery is done.
 185  * This is set by the dlm recover_prep callback and cleared by the
 186  * gfs2_control thread when journal recovery is complete.  To avoid
 187  * races between recover_prep setting and gfs2_control clearing, recover_spin
 188  * is held while changing this bit and reading/writing recover_block
 189  * and recover_start.
 190  *
 191  * DFL_NO_DLM_OPS: dlm lockspace ops/callbacks are not being used.
 192  *
 193  * DFL_FIRST_MOUNT: this node is the first to mount this fs and is doing
 194  * recovery of all journals before allowing other nodes to mount the fs.
 195  * This is cleared when FIRST_MOUNT_DONE is set.
 196  *
 197  * DFL_FIRST_MOUNT_DONE: this node was the first mounter, and has finished
 198  * recovery of all journals, and now allows other nodes to mount the fs.
 199  *
 200  * DFL_MOUNT_DONE: gdlm_mount has completed successfully and cleared
 201  * BLOCK_LOCKS for the first time.  The gfs2_control thread should now
 202  * control clearing BLOCK_LOCKS for further recoveries.
 203  *
 204  * DFL_UNMOUNT: gdlm_unmount sets to keep sdp off gfs2_control_wq.
 205  *
 206  * DFL_DLM_RECOVERY: set while dlm is in recovery, between recover_prep()
 207  * and recover_done(), i.e. set while recover_block == recover_start.
 208  */
 209
 210 enum {
 211         DFL_BLOCK_LOCKS         = 0,
 212         DFL_NO_DLM_OPS          = 1,
 213         DFL_FIRST_MOUNT         = 2,
 214         DFL_FIRST_MOUNT_DONE    = 3,
 215         DFL_MOUNT_DONE          = 4,
 216         DFL_UNMOUNT             = 5,
 217         DFL_DLM_RECOVERY        = 6,
 218 };
 219
 220 /*
 221  * We are using struct lm_lockname as an rhashtable key.  Avoid holes within
 222  * the struct; padding at the end is fine.
 223  */
 224 struct lm_lockname {
 225         u64 ln_number;
 226         struct gfs2_sbd *ln_sbd;
 227         unsigned int ln_type;
 228 };
 229
 230 #define lm_name_equal(name1, name2) \
 231         (((name1)->ln_number == (name2)->ln_number) &&  \
 232          ((name1)->ln_type == (name2)->ln_type) &&      \
 233          ((name1)->ln_sbd == (name2)->ln_sbd))
 234
 235
 236 struct gfs2_glock_operations {
 237         void (*go_sync) (struct gfs2_glock *gl);
 238         int (*go_xmote_bh) (struct gfs2_glock *gl, struct gfs2_holder *gh);
 239         void (*go_inval) (struct gfs2_glock *gl, int flags);
 240         int (*go_demote_ok) (const struct gfs2_glock *gl);
 241         int (*go_lock) (struct gfs2_holder *gh);
 242         void (*go_unlock) (struct gfs2_holder *gh);
 243         void (*go_dump)(struct seq_file *seq, struct gfs2_glock *gl);
 244         void (*go_callback)(struct gfs2_glock *gl, bool remote);
 245         const int go_type;
 246         const unsigned long go_flags;
 247 #define GLOF_ASPACE 1
 248 #define GLOF_LVB    2
 249 #define GLOF_LRU    4
 250 };
 251
 252 enum {
 253         GFS2_LKS_SRTT = 0,      /* Non blocking smoothed round trip time */
 254         GFS2_LKS_SRTTVAR = 1,   /* Non blocking smoothed variance */
 255         GFS2_LKS_SRTTB = 2,     /* Blocking smoothed round trip time */
 256         GFS2_LKS_SRTTVARB = 3,  /* Blocking smoothed variance */
 257         GFS2_LKS_SIRT = 4,      /* Smoothed Inter-request time */
 258         GFS2_LKS_SIRTVAR = 5,   /* Smoothed Inter-request variance */
 259         GFS2_LKS_DCOUNT = 6,    /* Count of dlm requests */
 260         GFS2_LKS_QCOUNT = 7,    /* Count of gfs2_holder queues */
 261         GFS2_NR_LKSTATS
 262 };
 263
 264 struct gfs2_lkstats {
 265         u64 stats[GFS2_NR_LKSTATS];
 266 };
 267
 268 enum {
 269         /* States */
 270         HIF_HOLDER              = 6,  /* Set for gh that "holds" the glock */
 271         HIF_FIRST               = 7,
 272         HIF_WAIT                = 10,
 273 };
 274
 275 struct gfs2_holder {
 276         struct list_head gh_list;
 277
 278         struct gfs2_glock *gh_gl;
 279         struct pid *gh_owner_pid;
 280         u16 gh_flags;
 281         u16 gh_state;
 282
 283         int gh_error;
 284         unsigned long gh_iflags; /* HIF_... */
 285         unsigned long gh_ip;
 286 };
 287
 288 /* Number of quota types we support */
 289 #define GFS2_MAXQUOTAS 2
 290
 291 struct gfs2_qadata { /* quota allocation data */
 292         /* Quota stuff */
 293         struct gfs2_quota_data *qa_qd[2 * GFS2_MAXQUOTAS];
 294         struct gfs2_holder qa_qd_ghs[2 * GFS2_MAXQUOTAS];
 295         unsigned int qa_qd_num;
 296 };
 297
 298 /* Resource group multi-block reservation, in order of appearance:
 299
 300    Step 1. Function prepares to write, allocates a mb, sets the size hint.
 301    Step 2. User calls inplace_reserve to target an rgrp, sets the rgrp info
 302    Step 3. Function get_local_rgrp locks the rgrp, determines which bits to use
 303    Step 4. Bits are assigned from the rgrp based on either the reservation
 304            or wherever it can.
 305 */
 306
 307 struct gfs2_blkreserv {
 308         struct rb_node rs_node;       /* link to other block reservations */
 309         struct gfs2_rbm rs_rbm;       /* Start of reservation */
 310         u32 rs_free;                  /* how many blocks are still free */
 311 };
 312
 313 /*
 314  * Allocation parameters
 315  * @target: The number of blocks we'd ideally like to allocate
 316  * @aflags: The flags (e.g. Orlov flag)
 317  *
 318  * The intent is to gradually expand this structure over time in
 319  * order to give more information, e.g. alignment, min extent size
 320  * to the allocation code.
 321  */
 322 struct gfs2_alloc_parms {
 323         u64 target;
 324         u32 min_target;
 325         u32 aflags;
 326         u64 allowed;
 327 };
 328
 329 enum {
 330         GLF_LOCK                        = 1,
 331         GLF_DEMOTE                      = 3,
 332         GLF_PENDING_DEMOTE              = 4,
 333         GLF_DEMOTE_IN_PROGRESS          = 5,
 334         GLF_DIRTY                       = 6,
 335         GLF_LFLUSH                      = 7,
 336         GLF_INVALIDATE_IN_PROGRESS      = 8,
 337         GLF_REPLY_PENDING               = 9,
 338         GLF_INITIAL                     = 10,
 339         GLF_FROZEN                      = 11,
 340         GLF_QUEUED                      = 12,
 341         GLF_LRU                         = 13,
 342         GLF_OBJECT                      = 14, /* Used only for tracing */
 343         GLF_BLOCKING                    = 15,
 344         GLF_INODE_CREATING              = 16, /* Inode creation occurring */
 345 };
 346
 347 struct gfs2_glock {
 348         unsigned long gl_flags;         /* GLF_... */
 349         struct lm_lockname gl_name;
 350
 351         struct lockref gl_lockref;
 352
 353         /* State fields protected by gl_lockref.lock */
 354         unsigned int gl_state:2,        /* Current state */
 355                      gl_target:2,       /* Target state */
 356                      gl_demote_state:2, /* State requested by remote node */
 357                      gl_req:2,          /* State in last dlm request */
 358                      gl_reply:8;        /* Last reply from the dlm */
 359
 360         unsigned long gl_demote_time; /* time of first demote request */
 361         long gl_hold_time;
 362         struct list_head gl_holders;
 363
 364         const struct gfs2_glock_operations *gl_ops;
 365         ktime_t gl_dstamp;
 366         struct gfs2_lkstats gl_stats;
 367         struct dlm_lksb gl_lksb;
 368         unsigned long gl_tchange;
 369         void *gl_object;
 370
 371         struct list_head gl_lru;
 372         struct list_head gl_ail_list;
 373         atomic_t gl_ail_count;
 374         atomic_t gl_revokes;
 375         struct delayed_work gl_work;
 376         union {
 377                 /* For inode and iopen glocks only */
 378                 struct work_struct gl_delete;
 379                 /* For rgrp glocks only */
 380                 struct {
 381                         loff_t start;
 382                         loff_t end;
 383                 } gl_vm;
 384         };
 385         struct rcu_head gl_rcu;
 386         struct rhash_head gl_node;
 387 };
 388
 389 #define GFS2_MIN_LVB_SIZE 32    /* Min size of LVB that gfs2 supports */
 390
 391 enum {
 392         GIF_INVALID             = 0,
 393         GIF_QD_LOCKED           = 1,
 394         GIF_ALLOC_FAILED        = 2,
 395         GIF_SW_PAGED            = 3,
 396         GIF_ORDERED             = 4,
 397         GIF_FREE_VFS_INODE      = 5,
 398         GIF_GLOP_PENDING        = 6,
 399 };
 400
 401 struct gfs2_inode {
 402         struct inode i_inode;
 403         u64 i_no_addr;
 404         u64 i_no_formal_ino;
 405         u64 i_generation;
 406         u64 i_eattr;
 407         unsigned long i_flags;          /* GIF_... */
 408         struct gfs2_glock *i_gl; /* Move into i_gh? */
 409         struct gfs2_holder i_iopen_gh;
 410         struct gfs2_holder i_gh; /* for prepare/commit_write only */
 411         struct gfs2_qadata *i_qadata; /* quota allocation data */
 412         struct gfs2_holder i_rgd_gh;
 413         struct gfs2_blkreserv i_res; /* rgrp multi-block reservation */
 414         u64 i_goal;     /* goal block for allocations */
 415         atomic_t i_sizehint;  /* hint of the write size */
 416         struct rw_semaphore i_rw_mutex;
 417         struct list_head i_ordered;
 418         struct list_head i_trunc_list;
 419         __be64 *i_hash_cache;
 420         u32 i_entries;
 421         u32 i_diskflags;
 422         u8 i_height;
 423         u8 i_depth;
 424         u16 i_rahead;
 425 };
 426
 427 /*
 428  * Since i_inode is the first element of struct gfs2_inode,
 429  * this is effectively a cast.
 430  */
 431 static inline struct gfs2_inode *GFS2_I(struct inode *inode)
 432 {
 433         return container_of(inode, struct gfs2_inode, i_inode);
 434 }
 435
 436 static inline struct gfs2_sbd *GFS2_SB(const struct inode *inode)
 437 {
 438         return inode->i_sb->s_fs_info;
 439 }
 440
 441 struct gfs2_file {
 442         struct mutex f_fl_mutex;
 443         struct gfs2_holder f_fl_gh;
 444 };
 445
 446 struct gfs2_revoke_replay {
 447         struct list_head rr_list;
 448         u64 rr_blkno;
 449         unsigned int rr_where;
 450 };
 451
 452 enum {
 453         QDF_CHANGE              = 1,
 454         QDF_LOCKED              = 2,
 455         QDF_REFRESH             = 3,
 456         QDF_QMSG_QUIET          = 4,
 457 };
 458
 459 struct gfs2_quota_data {
 460         struct hlist_bl_node qd_hlist;
 461         struct list_head qd_list;
 462         struct kqid qd_id;
 463         struct gfs2_sbd *qd_sbd;
 464         struct lockref qd_lockref;
 465         struct list_head qd_lru;
 466         unsigned qd_hash;
 467
 468         unsigned long qd_flags;         /* QDF_... */
 469
 470         s64 qd_change;
 471         s64 qd_change_sync;
 472
 473         unsigned int qd_slot;
 474         unsigned int qd_slot_count;
 475
 476         struct buffer_head *qd_bh;
 477         struct gfs2_quota_change *qd_bh_qc;
 478         unsigned int qd_bh_count;
 479
 480         struct gfs2_glock *qd_gl;
 481         struct gfs2_quota_lvb qd_qb;
 482
 483         u64 qd_sync_gen;
 484         unsigned long qd_last_warn;
 485         struct rcu_head qd_rcu;
 486 };
 487
 488 enum {
 489         TR_TOUCHED = 1,
 490         TR_ATTACHED = 2,
 491         TR_ALLOCED = 3,
 492 };
 493
 494 struct gfs2_trans {
 495         unsigned long tr_ip;
 496
 497         unsigned int tr_blocks;
 498         unsigned int tr_revokes;
 499         unsigned int tr_reserved;
 500         unsigned long tr_flags;
 501
 502         unsigned int tr_num_buf_new;
 503         unsigned int tr_num_databuf_new;
 504         unsigned int tr_num_buf_rm;
 505         unsigned int tr_num_databuf_rm;
 506         unsigned int tr_num_revoke;
 507         unsigned int tr_num_revoke_rm;
 508
 509         struct list_head tr_list;
 510         struct list_head tr_databuf;
 511         struct list_head tr_buf;
 512
 513         unsigned int tr_first;
 514         struct list_head tr_ail1_list;
 515         struct list_head tr_ail2_list;
 516 };
 517
 518 struct gfs2_journal_extent {
 519         struct list_head list;
 520
 521         unsigned int lblock; /* First logical block */
 522         u64 dblock; /* First disk block */
 523         u64 blocks;
 524 };
 525
 526 struct gfs2_jdesc {
 527         struct list_head jd_list;
 528         struct list_head extent_list;
 529         unsigned int nr_extents;
 530         struct work_struct jd_work;
 531         struct inode *jd_inode;
 532         unsigned long jd_flags;
 533 #define JDF_RECOVERY 1
 534         unsigned int jd_jid;
 535         u32 jd_blocks;
 536         int jd_recover_error;
 537         /* Replay stuff */
 538
 539         unsigned int jd_found_blocks;
 540         unsigned int jd_found_revokes;
 541         unsigned int jd_replayed_blocks;
 542
 543         struct list_head jd_revoke_list;
 544         unsigned int jd_replay_tail;
 545
 546 };
 547
 548 struct gfs2_statfs_change_host {
 549         s64 sc_total;
 550         s64 sc_free;
 551         s64 sc_dinodes;
 552 };
 553
 554 #define GFS2_QUOTA_DEFAULT      GFS2_QUOTA_OFF
 555 #define GFS2_QUOTA_OFF          0
 556 #define GFS2_QUOTA_ACCOUNT      1
 557 #define GFS2_QUOTA_ON           2
 558
 559 #define GFS2_DATA_DEFAULT       GFS2_DATA_ORDERED
 560 #define GFS2_DATA_WRITEBACK     1
 561 #define GFS2_DATA_ORDERED       2
 562
 563 #define GFS2_ERRORS_DEFAULT     GFS2_ERRORS_WITHDRAW
 564 #define GFS2_ERRORS_WITHDRAW    0
 565 #define GFS2_ERRORS_CONTINUE    1 /* place holder for future feature */
 566 #define GFS2_ERRORS_RO          2 /* place holder for future feature */
 567 #define GFS2_ERRORS_PANIC       3
 568
 569 struct gfs2_args {
 570         char ar_lockproto[GFS2_LOCKNAME_LEN];   /* Name of the Lock Protocol */
 571         char ar_locktable[GFS2_LOCKNAME_LEN];   /* Name of the Lock Table */
 572         char ar_hostdata[GFS2_LOCKNAME_LEN];    /* Host specific data */
 573         unsigned int ar_spectator:1;            /* Don't get a journal */
 574         unsigned int ar_localflocks:1;          /* Let the VFS do flock|fcntl */
 575         unsigned int ar_debug:1;                /* Oops on errors */
 576         unsigned int ar_posix_acl:1;            /* Enable posix acls */
 577         unsigned int ar_quota:2;                /* off/account/on */
 578         unsigned int ar_suiddir:1;              /* suiddir support */
 579         unsigned int ar_data:2;                 /* ordered/writeback */
 580         unsigned int ar_meta:1;                 /* mount metafs */
 581         unsigned int ar_discard:1;              /* discard requests */
 582         unsigned int ar_errors:2;               /* errors=withdraw | panic */
 583         unsigned int ar_nobarrier:1;            /* do not send barriers */
 584         unsigned int ar_rgrplvb:1;              /* use lvbs for rgrp info */
 585         unsigned int ar_loccookie:1;            /* use location based readdir
 586                                                    cookies */
 587         int ar_commit;                          /* Commit interval */
 588         int ar_statfs_quantum;                  /* The fast statfs interval */
 589         int ar_quota_quantum;                   /* The quota interval */
 590         int ar_statfs_percent;                  /* The % change to force sync */
 591 };
 592
 593 struct gfs2_tune {
 594         spinlock_t gt_spin;
 595
 596         unsigned int gt_logd_secs;
 597
 598         unsigned int gt_quota_warn_period; /* Secs between quota warn msgs */
 599         unsigned int gt_quota_scale_num; /* Numerator */
 600         unsigned int gt_quota_scale_den; /* Denominator */
 601         unsigned int gt_quota_quantum; /* Secs between syncs to quota file */
 602         unsigned int gt_new_files_jdata;
 603         unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */
 604         unsigned int gt_complain_secs;
 605         unsigned int gt_statfs_quantum;
 606         unsigned int gt_statfs_slow;
 607 };
 608
 609 enum {
 610         SDF_JOURNAL_CHECKED     = 0,
 611         SDF_JOURNAL_LIVE        = 1,
 612         SDF_SHUTDOWN            = 2,
 613         SDF_NOBARRIERS          = 3,
 614         SDF_NORECOVERY          = 4,
 615         SDF_DEMOTE              = 5,
 616         SDF_NOJOURNALID         = 6,
 617         SDF_RORECOVERY          = 7, /* read only recovery */
 618         SDF_SKIP_DLM_UNLOCK     = 8,
 619         SDF_FORCE_AIL_FLUSH     = 9,
 620         SDF_AIL1_IO_ERROR       = 10,
 621         SDF_FS_FROZEN           = 11,
 622 };
 623
 624 enum gfs2_freeze_state {
 625         SFS_UNFROZEN            = 0,
 626         SFS_STARTING_FREEZE     = 1,
 627         SFS_FROZEN              = 2,
 628 };
 629
 630 #define GFS2_FSNAME_LEN         256
 631
 632 struct gfs2_inum_host {
 633         u64 no_formal_ino;
 634         u64 no_addr;
 635 };
 636
 637 struct gfs2_sb_host {
 638         u32 sb_magic;
 639         u32 sb_type;
 640         u32 sb_format;
 641
 642         u32 sb_fs_format;
 643         u32 sb_multihost_format;
 644         u32 sb_bsize;
 645         u32 sb_bsize_shift;
 646
 647         struct gfs2_inum_host sb_master_dir;
 648         struct gfs2_inum_host sb_root_dir;
 649
 650         char sb_lockproto[GFS2_LOCKNAME_LEN];
 651         char sb_locktable[GFS2_LOCKNAME_LEN];
 652 };
 653
 654 /*
 655  * lm_mount() return values
 656  *
 657  * ls_jid - the journal ID this node should use
 658  * ls_first - this node is the first to mount the file system
 659  * ls_lockspace - lock module's context for this file system
 660  * ls_ops - lock module's functions
 661  */
 662
 663 struct lm_lockstruct {
 664         int ls_jid;
 665         unsigned int ls_first;
 666         const struct lm_lockops *ls_ops;
 667         dlm_lockspace_t *ls_dlm;
 668
 669         int ls_recover_jid_done;   /* These two are deprecated, */
 670         int ls_recover_jid_status; /* used previously by gfs_controld */
 671
 672         struct dlm_lksb ls_mounted_lksb; /* mounted_lock */
 673         struct dlm_lksb ls_control_lksb; /* control_lock */
 674         char ls_control_lvb[GDLM_LVB_SIZE]; /* control_lock lvb */
 675         struct completion ls_sync_wait; /* {control,mounted}_{lock,unlock} */
 676         char *ls_lvb_bits;
 677
 678         spinlock_t ls_recover_spin; /* protects following fields */
 679         unsigned long ls_recover_flags; /* DFL_ */
 680         uint32_t ls_recover_mount; /* gen in first recover_done cb */
 681         uint32_t ls_recover_start; /* gen in last recover_done cb */
 682         uint32_t ls_recover_block; /* copy recover_start in last recover_prep */
 683         uint32_t ls_recover_size; /* size of recover_submit, recover_result */
 684         uint32_t *ls_recover_submit; /* gen in last recover_slot cb per jid */
 685         uint32_t *ls_recover_result; /* result of last jid recovery */
 686 };
 687
 688 struct gfs2_pcpu_lkstats {
 689         /* One struct for each glock type */
 690         struct gfs2_lkstats lkstats[10];
 691 };
 692
 693 struct gfs2_sbd {
 694         struct super_block *sd_vfs;
 695         struct gfs2_pcpu_lkstats __percpu *sd_lkstats;
 696         struct kobject sd_kobj;
 697         unsigned long sd_flags; /* SDF_... */
 698         struct gfs2_sb_host sd_sb;
 699
 700         /* Constants computed on mount */
 701
 702         u32 sd_fsb2bb;
 703         u32 sd_fsb2bb_shift;
 704         u32 sd_diptrs;  /* Number of pointers in a dinode */
 705         u32 sd_inptrs;  /* Number of pointers in a indirect block */
 706         u32 sd_jbsize;  /* Size of a journaled data block */
 707         u32 sd_hash_bsize;      /* sizeof(exhash block) */
 708         u32 sd_hash_bsize_shift;
 709         u32 sd_hash_ptrs;       /* Number of pointers in a hash block */
 710         u32 sd_qc_per_block;
 711         u32 sd_blocks_per_bitmap;
 712         u32 sd_max_dirres;      /* Max blocks needed to add a directory entry */
 713         u32 sd_max_height;      /* Max height of a file's metadata tree */
 714         u64 sd_heightsize[GFS2_MAX_META_HEIGHT + 1];
 715         u32 sd_max_dents_per_leaf; /* Max number of dirents in a leaf block */
 716
 717         struct gfs2_args sd_args;       /* Mount arguments */
 718         struct gfs2_tune sd_tune;       /* Filesystem tuning structure */
 719
 720         /* Lock Stuff */
 721
 722         struct lm_lockstruct sd_lockstruct;
 723         struct gfs2_holder sd_live_gh;
 724         struct gfs2_glock *sd_rename_gl;
 725         struct gfs2_glock *sd_freeze_gl;
 726         struct work_struct sd_freeze_work;
 727         wait_queue_head_t sd_glock_wait;
 728         atomic_t sd_glock_disposal;
 729         struct completion sd_locking_init;
 730         struct completion sd_wdack;
 731         struct delayed_work sd_control_work;
 732
 733         /* Inode Stuff */
 734
 735         struct dentry *sd_master_dir;
 736         struct dentry *sd_root_dir;
 737
 738         struct inode *sd_jindex;
 739         struct inode *sd_statfs_inode;
 740         struct inode *sd_sc_inode;
 741         struct inode *sd_qc_inode;
 742         struct inode *sd_rindex;
 743         struct inode *sd_quota_inode;
 744
 745         /* StatFS stuff */
 746
 747         spinlock_t sd_statfs_spin;
 748         struct gfs2_statfs_change_host sd_statfs_master;
 749         struct gfs2_statfs_change_host sd_statfs_local;
 750         int sd_statfs_force_sync;
 751
 752         /* Resource group stuff */
 753
 754         int sd_rindex_uptodate;
 755         spinlock_t sd_rindex_spin;
 756         struct rb_root sd_rindex_tree;
 757         unsigned int sd_rgrps;
 758         unsigned int sd_max_rg_data;
 759
 760         /* Journal index stuff */
 761
 762         struct list_head sd_jindex_list;
 763         spinlock_t sd_jindex_spin;
 764         struct mutex sd_jindex_mutex;
 765         unsigned int sd_journals;
 766
 767         struct gfs2_jdesc *sd_jdesc;
 768         struct gfs2_holder sd_journal_gh;
 769         struct gfs2_holder sd_jinode_gh;
 770
 771         struct gfs2_holder sd_sc_gh;
 772         struct gfs2_holder sd_qc_gh;
 773
 774         struct completion sd_journal_ready;
 775
 776         /* Daemon stuff */
 777
 778         struct task_struct *sd_logd_process;
 779         struct task_struct *sd_quotad_process;
 780
 781         /* Quota stuff */
 782
 783         struct list_head sd_quota_list;
 784         atomic_t sd_quota_count;
 785         struct mutex sd_quota_mutex;
 786         struct mutex sd_quota_sync_mutex;
 787         wait_queue_head_t sd_quota_wait;
 788         struct list_head sd_trunc_list;
 789         spinlock_t sd_trunc_lock;
 790
 791         unsigned int sd_quota_slots;
 792         unsigned long *sd_quota_bitmap;
 793         spinlock_t sd_bitmap_lock;
 794
 795         u64 sd_quota_sync_gen;
 796
 797         /* Log stuff */
 798
 799         struct address_space sd_aspace;
 800
 801         spinlock_t sd_log_lock;
 802
 803         struct gfs2_trans *sd_log_tr;
 804         unsigned int sd_log_blks_reserved;
 805         int sd_log_commited_revoke;
 806
 807         atomic_t sd_log_pinned;
 808         unsigned int sd_log_num_revoke;
 809
 810         struct list_head sd_log_revokes;
 811         struct list_head sd_log_ordered;
 812         spinlock_t sd_ordered_lock;
 813
 814         atomic_t sd_log_thresh1;
 815         atomic_t sd_log_thresh2;
 816         atomic_t sd_log_blks_free;
 817         atomic_t sd_log_blks_needed;
 818         wait_queue_head_t sd_log_waitq;
 819         wait_queue_head_t sd_logd_waitq;
 820
 821         u64 sd_log_sequence;
 822         unsigned int sd_log_head;
 823         unsigned int sd_log_tail;
 824         int sd_log_idle;
 825
 826         struct rw_semaphore sd_log_flush_lock;
 827         atomic_t sd_log_in_flight;
 828         struct bio *sd_log_bio;
 829         wait_queue_head_t sd_log_flush_wait;
 830         int sd_log_error;
 831
 832         atomic_t sd_reserving_log;
 833         wait_queue_head_t sd_reserving_log_wait;
 834
 835         unsigned int sd_log_flush_head;
 836
 837         spinlock_t sd_ail_lock;
 838         struct list_head sd_ail1_list;
 839         struct list_head sd_ail2_list;
 840
 841         /* For quiescing the filesystem */
 842         struct gfs2_holder sd_freeze_gh;
 843         atomic_t sd_freeze_state;
 844         struct mutex sd_freeze_mutex;
 845
 846         char sd_fsname[GFS2_FSNAME_LEN + 3 * sizeof(int) + 2];
 847         char sd_table_name[GFS2_FSNAME_LEN];
 848         char sd_proto_name[GFS2_FSNAME_LEN];
 849
 850         /* Debugging crud */
 851
 852         unsigned long sd_last_warning;
 853         struct dentry *debugfs_dir;    /* debugfs directory */
 854 };
 855
 856 static inline void gfs2_glstats_inc(struct gfs2_glock *gl, int which)
 857 {
 858         gl->gl_stats.stats[which]++;
 859 }
 860
 861 static inline void gfs2_sbstats_inc(const struct gfs2_glock *gl, int which)
 862 {
 863         const struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
 864         preempt_disable();
 865         this_cpu_ptr(sdp->sd_lkstats)->lkstats[gl->gl_name.ln_type].stats[which]++;
 866         preempt_enable();
 867 }
 868
 869 extern struct gfs2_rgrpd *gfs2_glock2rgrp(struct gfs2_glock *gl);
 870
 871 static inline unsigned gfs2_max_stuffed_size(const struct gfs2_inode *ip)
 872 {
 873         return GFS2_SB(&ip->i_inode)->sd_sb.sb_bsize - sizeof(struct gfs2_dinode);
 874 }
 875
 876 #endif /* __INCORE_DOT_H__ */
 877