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 #include <linux/mutex.h>
  24
  25 #define DIO_WAIT        0x00000010
  26 #define DIO_METADATA    0x00000020
  27
  28 struct gfs2_log_operations;
  29 struct gfs2_bufdata;
  30 struct gfs2_holder;
  31 struct gfs2_glock;
  32 struct gfs2_quota_data;
  33 struct gfs2_trans;
  34 struct gfs2_jdesc;
  35 struct gfs2_sbd;
  36 struct lm_lockops;
  37
  38 typedef void (*gfs2_glop_bh_t) (struct gfs2_glock *gl, unsigned int ret);
  39
  40 struct gfs2_log_header_host {
  41         u64 lh_sequence;        /* Sequence number of this transaction */
  42         u32 lh_flags;           /* GFS2_LOG_HEAD_... */
  43         u32 lh_tail;            /* Block number of log tail */
  44         u32 lh_blkno;
  45
  46         s64 lh_local_total;
  47         s64 lh_local_free;
  48         s64 lh_local_dinodes;
  49 };
  50
  51 /*
  52  * Structure of operations that are associated with each
  53  * type of element in the log.
  54  */
  55
  56 struct gfs2_log_operations {
  57         void (*lo_before_commit) (struct gfs2_sbd *sdp, struct gfs2_trans *tr);
  58         void (*lo_after_commit) (struct gfs2_sbd *sdp, struct gfs2_trans *tr);
  59         void (*lo_before_scan) (struct gfs2_jdesc *jd,
  60                                 struct gfs2_log_header_host *head, int pass);
  61         int (*lo_scan_elements) (struct gfs2_jdesc *jd, unsigned int start,
  62                                  struct gfs2_log_descriptor *ld, __be64 *ptr,
  63                                  int pass);
  64         void (*lo_after_scan) (struct gfs2_jdesc *jd, int error, int pass);
  65         const char *lo_name;
  66 };
  67
  68 #define GBF_FULL 1
  69
  70 /**
  71  * Clone bitmaps (bi_clone):
  72  *
  73  * - When a block is freed, we remember the previous state of the block in the
  74  *   clone bitmap, and only mark the block as free in the real bitmap.
  75  *
  76  * - When looking for a block to allocate, we check for a free block in the
  77  *   clone bitmap, and if no clone bitmap exists, in the real bitmap.
  78  *
  79  * - For allocating a block, we mark it as allocated in the real bitmap, and if
  80  *   a clone bitmap exists, also in the clone bitmap.
  81  *
  82  * - At the end of a log_flush, we copy the real bitmap into the clone bitmap
  83  *   to make the clone bitmap reflect the current allocation state.
  84  *   (Alternatively, we could remove the clone bitmap.)
  85  *
  86  * The clone bitmaps are in-core only, and is never written to disk.
  87  *
  88  * These steps ensure that blocks which have been freed in a transaction cannot
  89  * be reallocated in that same transaction.
  90  */
  91 struct gfs2_bitmap {
  92         struct buffer_head *bi_bh;
  93         char *bi_clone;
  94         unsigned long bi_flags;
  95         u32 bi_offset;
  96         u32 bi_start;
  97         u32 bi_bytes;
  98         u32 bi_blocks;
  99 };
 100
 101 struct gfs2_rgrpd {
 102         struct rb_node rd_node;         /* Link with superblock */
 103         struct gfs2_glock *rd_gl;       /* Glock for this rgrp */
 104         u64 rd_addr;                    /* grp block disk address */
 105         u64 rd_data0;                   /* first data location */
 106         u32 rd_length;                  /* length of rgrp header in fs blocks */
 107         u32 rd_data;                    /* num of data blocks in rgrp */
 108         u32 rd_bitbytes;                /* number of bytes in data bitmaps */
 109         u32 rd_free;
 110         u32 rd_requested;               /* number of blocks in rd_rstree */
 111         u32 rd_reserved;                /* number of reserved blocks */
 112         u32 rd_free_clone;
 113         u32 rd_dinodes;
 114         u64 rd_igeneration;
 115         struct gfs2_bitmap *rd_bits;
 116         struct gfs2_sbd *rd_sbd;
 117         struct gfs2_rgrp_lvb *rd_rgl;
 118         u32 rd_last_alloc;
 119         u32 rd_flags;
 120         u32 rd_extfail_pt;              /* extent failure point */
 121 #define GFS2_RDF_CHECK          0x10000000 /* check for unlinked inodes */
 122 #define GFS2_RDF_ERROR          0x40000000 /* error in rg */
 123 #define GFS2_RDF_PREFERRED      0x80000000 /* This rgrp is preferred */
 124 #define GFS2_RDF_MASK           0xf0000000 /* mask for internal flags */
 125         spinlock_t rd_rsspin;           /* protects reservation related vars */
 126         struct mutex rd_mutex;
 127         struct rb_root rd_rstree;       /* multi-block reservation tree */
 128 };
 129
 130 enum gfs2_state_bits {
 131         BH_Pinned = BH_PrivateStart,
 132         BH_Escaped = BH_PrivateStart + 1,
 133 };
 134
 135 BUFFER_FNS(Pinned, pinned)
 136 TAS_BUFFER_FNS(Pinned, pinned)
 137 BUFFER_FNS(Escaped, escaped)
 138 TAS_BUFFER_FNS(Escaped, escaped)
 139
 140 struct gfs2_bufdata {
 141         struct buffer_head *bd_bh;
 142         struct gfs2_glock *bd_gl;
 143         u64 bd_blkno;
 144
 145         struct list_head bd_list;
 146
 147         struct gfs2_trans *bd_tr;
 148         struct list_head bd_ail_st_list;
 149         struct list_head bd_ail_gl_list;
 150 };
 151
 152 /*
 153  * Internally, we prefix things with gdlm_ and GDLM_ (for gfs-dlm) since a
 154  * prefix of lock_dlm_ gets awkward.
 155  */
 156
 157 #define GDLM_STRNAME_BYTES      25
 158 #define GDLM_LVB_SIZE           32
 159
 160 /*
 161  * ls_recover_flags:
 162  *
 163  * DFL_BLOCK_LOCKS: dlm is in recovery and will grant locks that had been
 164  * held by failed nodes whose journals need recovery.  Those locks should
 165  * only be used for journal recovery until the journal recovery is done.
 166  * This is set by the dlm recover_prep callback and cleared by the
 167  * gfs2_control thread when journal recovery is complete.  To avoid
 168  * races between recover_prep setting and gfs2_control clearing, recover_spin
 169  * is held while changing this bit and reading/writing recover_block
 170  * and recover_start.
 171  *
 172  * DFL_NO_DLM_OPS: dlm lockspace ops/callbacks are not being used.
 173  *
 174  * DFL_FIRST_MOUNT: this node is the first to mount this fs and is doing
 175  * recovery of all journals before allowing other nodes to mount the fs.
 176  * This is cleared when FIRST_MOUNT_DONE is set.
 177  *
 178  * DFL_FIRST_MOUNT_DONE: this node was the first mounter, and has finished
 179  * recovery of all journals, and now allows other nodes to mount the fs.
 180  *
 181  * DFL_MOUNT_DONE: gdlm_mount has completed successfully and cleared
 182  * BLOCK_LOCKS for the first time.  The gfs2_control thread should now
 183  * control clearing BLOCK_LOCKS for further recoveries.
 184  *
 185  * DFL_UNMOUNT: gdlm_unmount sets to keep sdp off gfs2_control_wq.
 186  *
 187  * DFL_DLM_RECOVERY: set while dlm is in recovery, between recover_prep()
 188  * and recover_done(), i.e. set while recover_block == recover_start.
 189  */
 190
 191 enum {
 192         DFL_BLOCK_LOCKS         = 0,
 193         DFL_NO_DLM_OPS          = 1,
 194         DFL_FIRST_MOUNT         = 2,
 195         DFL_FIRST_MOUNT_DONE    = 3,
 196         DFL_MOUNT_DONE          = 4,
 197         DFL_UNMOUNT             = 5,
 198         DFL_DLM_RECOVERY        = 6,
 199 };
 200
 201 /*
 202  * We are using struct lm_lockname as an rhashtable key.  Avoid holes within
 203  * the struct; padding at the end is fine.
 204  */
 205 struct lm_lockname {
 206         u64 ln_number;
 207         struct gfs2_sbd *ln_sbd;
 208         unsigned int ln_type;
 209 };
 210
 211 #define lm_name_equal(name1, name2) \
 212         (((name1)->ln_number == (name2)->ln_number) &&  \
 213          ((name1)->ln_type == (name2)->ln_type) &&      \
 214          ((name1)->ln_sbd == (name2)->ln_sbd))
 215
 216
 217 struct gfs2_glock_operations {
 218         int (*go_sync) (struct gfs2_glock *gl);
 219         int (*go_xmote_bh)(struct gfs2_glock *gl);
 220         void (*go_inval) (struct gfs2_glock *gl, int flags);
 221         int (*go_instantiate) (struct gfs2_glock *gl);
 222         int (*go_held)(struct gfs2_holder *gh);
 223         void (*go_dump)(struct seq_file *seq, const struct gfs2_glock *gl,
 224                         const char *fs_id_buf);
 225         void (*go_callback)(struct gfs2_glock *gl, bool remote);
 226         void (*go_unlocked)(struct gfs2_glock *gl);
 227         const int go_subclass;
 228         const int go_type;
 229         const unsigned long go_flags;
 230 #define GLOF_ASPACE 1 /* address space attached */
 231 #define GLOF_LVB    2 /* Lock Value Block attached */
 232 #define GLOF_NONDISK   8 /* not I/O related */
 233 };
 234
 235 enum {
 236         GFS2_LKS_SRTT = 0,      /* Non blocking smoothed round trip time */
 237         GFS2_LKS_SRTTVAR = 1,   /* Non blocking smoothed variance */
 238         GFS2_LKS_SRTTB = 2,     /* Blocking smoothed round trip time */
 239         GFS2_LKS_SRTTVARB = 3,  /* Blocking smoothed variance */
 240         GFS2_LKS_SIRT = 4,      /* Smoothed Inter-request time */
 241         GFS2_LKS_SIRTVAR = 5,   /* Smoothed Inter-request variance */
 242         GFS2_LKS_DCOUNT = 6,    /* Count of dlm requests */
 243         GFS2_LKS_QCOUNT = 7,    /* Count of gfs2_holder queues */
 244         GFS2_NR_LKSTATS
 245 };
 246
 247 struct gfs2_lkstats {
 248         u64 stats[GFS2_NR_LKSTATS];
 249 };
 250
 251 enum {
 252         /* States */
 253         HIF_HOLDER              = 6,  /* Set for gh that "holds" the glock */
 254         HIF_WAIT                = 10,
 255 };
 256
 257 struct gfs2_holder {
 258         struct list_head gh_list;
 259
 260         struct gfs2_glock *gh_gl;
 261         struct pid *gh_owner_pid;
 262         u16 gh_flags;
 263         u16 gh_state;
 264
 265         int gh_error;
 266         unsigned long gh_iflags; /* HIF_... */
 267         unsigned long gh_ip;
 268 };
 269
 270 /* Number of quota types we support */
 271 #define GFS2_MAXQUOTAS 2
 272
 273 struct gfs2_qadata { /* quota allocation data */
 274         /* Quota stuff */
 275         struct gfs2_quota_data *qa_qd[2 * GFS2_MAXQUOTAS];
 276         struct gfs2_holder qa_qd_ghs[2 * GFS2_MAXQUOTAS];
 277         unsigned int qa_qd_num;
 278         int qa_ref;
 279 };
 280
 281 /* Resource group multi-block reservation, in order of appearance:
 282
 283    Step 1. Function prepares to write, allocates a mb, sets the size hint.
 284    Step 2. User calls inplace_reserve to target an rgrp, sets the rgrp info
 285    Step 3. Function get_local_rgrp locks the rgrp, determines which bits to use
 286    Step 4. Bits are assigned from the rgrp based on either the reservation
 287            or wherever it can.
 288 */
 289
 290 struct gfs2_blkreserv {
 291         struct rb_node rs_node;       /* node within rd_rstree */
 292         struct gfs2_rgrpd *rs_rgd;
 293         u64 rs_start;
 294         u32 rs_requested;
 295         u32 rs_reserved;              /* number of reserved blocks */
 296 };
 297
 298 /*
 299  * Allocation parameters
 300  * @target: The number of blocks we'd ideally like to allocate
 301  * @aflags: The flags (e.g. Orlov flag)
 302  *
 303  * The intent is to gradually expand this structure over time in
 304  * order to give more information, e.g. alignment, min extent size
 305  * to the allocation code.
 306  */
 307 struct gfs2_alloc_parms {
 308         u64 target;
 309         u32 min_target;
 310         u32 aflags;
 311         u64 allowed;
 312 };
 313
 314 enum {
 315         GLF_LOCK                        = 1,
 316         GLF_INSTANTIATE_NEEDED          = 2, /* needs instantiate */
 317         GLF_DEMOTE                      = 3,
 318         GLF_PENDING_DEMOTE              = 4,
 319         GLF_DEMOTE_IN_PROGRESS          = 5,
 320         GLF_DIRTY                       = 6,
 321         GLF_LFLUSH                      = 7,
 322         GLF_INVALIDATE_IN_PROGRESS      = 8,
 323         GLF_HAVE_REPLY                  = 9,
 324         GLF_INITIAL                     = 10,
 325         GLF_HAVE_FROZEN_REPLY           = 11,
 326         GLF_INSTANTIATE_IN_PROG         = 12, /* instantiate happening now */
 327         GLF_LRU                         = 13,
 328         GLF_OBJECT                      = 14, /* Used only for tracing */
 329         GLF_BLOCKING                    = 15,
 330         GLF_UNLOCKED                    = 16, /* Wait for glock to be unlocked */
 331         GLF_TRY_TO_EVICT                = 17, /* iopen glocks only */
 332         GLF_VERIFY_DELETE               = 18, /* iopen glocks only */
 333 };
 334
 335 struct gfs2_glock {
 336         unsigned long gl_flags;         /* GLF_... */
 337         struct lm_lockname gl_name;
 338
 339         struct lockref gl_lockref;
 340
 341         /* State fields protected by gl_lockref.lock */
 342         unsigned int gl_state:2,        /* Current state */
 343                      gl_target:2,       /* Target state */
 344                      gl_demote_state:2, /* State requested by remote node */
 345                      gl_req:2,          /* State in last dlm request */
 346                      gl_reply:8;        /* Last reply from the dlm */
 347
 348         unsigned long gl_demote_time; /* time of first demote request */
 349         long gl_hold_time;
 350         struct list_head gl_holders;
 351
 352         const struct gfs2_glock_operations *gl_ops;
 353         ktime_t gl_dstamp;
 354         struct gfs2_lkstats gl_stats;
 355         struct dlm_lksb gl_lksb;
 356         unsigned long gl_tchange;
 357         void *gl_object;
 358
 359         struct list_head gl_lru;
 360         struct list_head gl_ail_list;
 361         atomic_t gl_ail_count;
 362         atomic_t gl_revokes;
 363         struct delayed_work gl_work;
 364         /* For iopen glocks only */
 365         struct {
 366                 struct delayed_work gl_delete;
 367                 u64 gl_no_formal_ino;
 368         };
 369         struct rcu_head gl_rcu;
 370         struct rhash_head gl_node;
 371 };
 372
 373 enum {
 374         GIF_QD_LOCKED           = 1,
 375         GIF_ALLOC_FAILED        = 2,
 376         GIF_SW_PAGED            = 3,
 377         GIF_FREE_VFS_INODE      = 5,
 378         GIF_GLOP_PENDING        = 6,
 379         GIF_DEFER_DELETE        = 7,
 380 };
 381
 382 struct gfs2_inode {
 383         struct inode i_inode;
 384         u64 i_no_addr;
 385         u64 i_no_formal_ino;
 386         u64 i_generation;
 387         u64 i_eattr;
 388         unsigned long i_flags;          /* GIF_... */
 389         struct gfs2_glock *i_gl;
 390         struct gfs2_holder i_iopen_gh;
 391         struct gfs2_qadata *i_qadata; /* quota allocation data */
 392         struct gfs2_holder i_rgd_gh;
 393         struct gfs2_blkreserv i_res; /* rgrp multi-block reservation */
 394         u64 i_goal;     /* goal block for allocations */
 395         atomic_t i_sizehint;  /* hint of the write size */
 396         struct rw_semaphore i_rw_mutex;
 397         struct list_head i_ordered;
 398         __be64 *i_hash_cache;
 399         u32 i_entries;
 400         u32 i_diskflags;
 401         u8 i_height;
 402         u8 i_depth;
 403         u16 i_rahead;
 404 };
 405
 406 /*
 407  * Since i_inode is the first element of struct gfs2_inode,
 408  * this is effectively a cast.
 409  */
 410 static inline struct gfs2_inode *GFS2_I(struct inode *inode)
 411 {
 412         return container_of(inode, struct gfs2_inode, i_inode);
 413 }
 414
 415 static inline struct gfs2_sbd *GFS2_SB(const struct inode *inode)
 416 {
 417         return inode->i_sb->s_fs_info;
 418 }
 419
 420 struct gfs2_file {
 421         struct mutex f_fl_mutex;
 422         struct gfs2_holder f_fl_gh;
 423 };
 424
 425 struct gfs2_revoke_replay {
 426         struct list_head rr_list;
 427         u64 rr_blkno;
 428         unsigned int rr_where;
 429 };
 430
 431 enum {
 432         QDF_CHANGE              = 1,
 433         QDF_LOCKED              = 2,
 434         QDF_REFRESH             = 3,
 435         QDF_QMSG_QUIET          = 4,
 436 };
 437
 438 struct gfs2_quota_data {
 439         struct hlist_bl_node qd_hlist;
 440         struct list_head qd_list;
 441         struct kqid qd_id;
 442         struct gfs2_sbd *qd_sbd;
 443         struct lockref qd_lockref;
 444         struct list_head qd_lru;
 445         unsigned qd_hash;
 446
 447         unsigned long qd_flags;         /* QDF_... */
 448
 449         s64 qd_change;
 450         s64 qd_change_sync;
 451
 452         unsigned int qd_slot;
 453         unsigned int qd_slot_ref;
 454
 455         struct buffer_head *qd_bh;
 456         struct gfs2_quota_change *qd_bh_qc;
 457         unsigned int qd_bh_count;
 458
 459         struct gfs2_glock *qd_gl;
 460         struct gfs2_quota_lvb qd_qb;
 461
 462         u64 qd_sync_gen;
 463         unsigned long qd_last_warn;
 464         struct rcu_head qd_rcu;
 465 };
 466
 467 enum {
 468         TR_TOUCHED = 1,
 469         TR_ATTACHED = 2,
 470         TR_ONSTACK = 3,
 471 };
 472
 473 struct gfs2_trans {
 474         unsigned long tr_ip;
 475
 476         unsigned int tr_blocks;
 477         unsigned int tr_revokes;
 478         unsigned int tr_reserved;
 479         unsigned long tr_flags;
 480
 481         unsigned int tr_num_buf_new;
 482         unsigned int tr_num_databuf_new;
 483         unsigned int tr_num_buf_rm;
 484         unsigned int tr_num_databuf_rm;
 485         unsigned int tr_num_revoke;
 486
 487         struct list_head tr_list;
 488         struct list_head tr_databuf;
 489         struct list_head tr_buf;
 490
 491         unsigned int tr_first;
 492         struct list_head tr_ail1_list;
 493         struct list_head tr_ail2_list;
 494 };
 495
 496 struct gfs2_journal_extent {
 497         struct list_head list;
 498
 499         unsigned int lblock; /* First logical block */
 500         u64 dblock; /* First disk block */
 501         u64 blocks;
 502 };
 503
 504 struct gfs2_jdesc {
 505         struct list_head jd_list;
 506         struct list_head extent_list;
 507         unsigned int nr_extents;
 508         struct work_struct jd_work;
 509         struct inode *jd_inode;
 510         struct bio *jd_log_bio;
 511         unsigned long jd_flags;
 512 #define JDF_RECOVERY 1
 513         unsigned int jd_jid;
 514         u32 jd_blocks;
 515         int jd_recover_error;
 516         /* Replay stuff */
 517
 518         unsigned int jd_found_blocks;
 519         unsigned int jd_found_revokes;
 520         unsigned int jd_replayed_blocks;
 521
 522         struct list_head jd_revoke_list;
 523         unsigned int jd_replay_tail;
 524
 525         u64 jd_no_addr;
 526 };
 527
 528 struct gfs2_statfs_change_host {
 529         s64 sc_total;
 530         s64 sc_free;
 531         s64 sc_dinodes;
 532 };
 533
 534 #define GFS2_QUOTA_DEFAULT      GFS2_QUOTA_OFF
 535 #define GFS2_QUOTA_OFF          0
 536 #define GFS2_QUOTA_ACCOUNT      1
 537 #define GFS2_QUOTA_ON           2
 538 #define GFS2_QUOTA_QUIET        3 /* on but not complaining */
 539
 540 #define GFS2_DATA_DEFAULT       GFS2_DATA_ORDERED
 541 #define GFS2_DATA_WRITEBACK     1
 542 #define GFS2_DATA_ORDERED       2
 543
 544 #define GFS2_ERRORS_DEFAULT     GFS2_ERRORS_WITHDRAW
 545 #define GFS2_ERRORS_WITHDRAW    0
 546 #define GFS2_ERRORS_CONTINUE    1 /* place holder for future feature */
 547 #define GFS2_ERRORS_RO          2 /* place holder for future feature */
 548 #define GFS2_ERRORS_PANIC       3
 549
 550 struct gfs2_args {
 551         char ar_lockproto[GFS2_LOCKNAME_LEN];   /* Name of the Lock Protocol */
 552         char ar_locktable[GFS2_LOCKNAME_LEN];   /* Name of the Lock Table */
 553         char ar_hostdata[GFS2_LOCKNAME_LEN];    /* Host specific data */
 554         unsigned int ar_spectator:1;            /* Don't get a journal */
 555         unsigned int ar_localflocks:1;          /* Let the VFS do flock|fcntl */
 556         unsigned int ar_debug:1;                /* Oops on errors */
 557         unsigned int ar_posix_acl:1;            /* Enable posix acls */
 558         unsigned int ar_quota:2;                /* off/account/on */
 559         unsigned int ar_suiddir:1;              /* suiddir support */
 560         unsigned int ar_data:2;                 /* ordered/writeback */
 561         unsigned int ar_meta:1;                 /* mount metafs */
 562         unsigned int ar_discard:1;              /* discard requests */
 563         unsigned int ar_errors:2;               /* errors=withdraw | panic */
 564         unsigned int ar_nobarrier:1;            /* do not send barriers */
 565         unsigned int ar_rgrplvb:1;              /* use lvbs for rgrp info */
 566         unsigned int ar_got_rgrplvb:1;          /* Was the rgrplvb opt given? */
 567         unsigned int ar_loccookie:1;            /* use location based readdir
 568                                                    cookies */
 569         s32 ar_commit;                          /* Commit interval */
 570         s32 ar_statfs_quantum;                  /* The fast statfs interval */
 571         s32 ar_quota_quantum;                   /* The quota interval */
 572         s32 ar_statfs_percent;                  /* The % change to force sync */
 573 };
 574
 575 struct gfs2_tune {
 576         spinlock_t gt_spin;
 577
 578         unsigned int gt_logd_secs;
 579
 580         unsigned int gt_quota_warn_period; /* Secs between quota warn msgs */
 581         unsigned int gt_quota_scale_num; /* Numerator */
 582         unsigned int gt_quota_scale_den; /* Denominator */
 583         unsigned int gt_quota_quantum; /* Secs between syncs to quota file */
 584         unsigned int gt_new_files_jdata;
 585         unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */
 586         unsigned int gt_complain_secs;
 587         unsigned int gt_statfs_quantum;
 588         unsigned int gt_statfs_slow;
 589 };
 590
 591 enum {
 592         SDF_JOURNAL_CHECKED     = 0,
 593         SDF_JOURNAL_LIVE        = 1,
 594         SDF_WITHDRAWN           = 2,
 595         SDF_NOBARRIERS          = 3,
 596         SDF_NORECOVERY          = 4,
 597         SDF_DEMOTE              = 5,
 598         SDF_NOJOURNALID         = 6,
 599         SDF_RORECOVERY          = 7, /* read only recovery */
 600         SDF_SKIP_DLM_UNLOCK     = 8,
 601         SDF_FORCE_AIL_FLUSH     = 9,
 602         SDF_FREEZE_INITIATOR    = 10,
 603         SDF_WITHDRAWING         = 11, /* Will withdraw eventually */
 604         SDF_WITHDRAW_IN_PROG    = 12, /* Withdraw is in progress */
 605         SDF_REMOTE_WITHDRAW     = 13, /* Performing remote recovery */
 606         SDF_WITHDRAW_RECOVERY   = 14, /* Wait for journal recovery when we are
 607                                          withdrawing */
 608         SDF_KILL                = 15,
 609         SDF_EVICTING            = 16,
 610         SDF_FROZEN              = 17,
 611 };
 612
 613 #define GFS2_FSNAME_LEN         256
 614
 615 struct gfs2_inum_host {
 616         u64 no_formal_ino;
 617         u64 no_addr;
 618 };
 619
 620 struct gfs2_sb_host {
 621         u32 sb_magic;
 622         u32 sb_type;
 623
 624         u32 sb_fs_format;
 625         u32 sb_multihost_format;
 626         u32 sb_bsize;
 627         u32 sb_bsize_shift;
 628
 629         struct gfs2_inum_host sb_master_dir;
 630         struct gfs2_inum_host sb_root_dir;
 631
 632         char sb_lockproto[GFS2_LOCKNAME_LEN];
 633         char sb_locktable[GFS2_LOCKNAME_LEN];
 634 };
 635
 636 /*
 637  * lm_mount() return values
 638  *
 639  * ls_jid - the journal ID this node should use
 640  * ls_first - this node is the first to mount the file system
 641  * ls_lockspace - lock module's context for this file system
 642  * ls_ops - lock module's functions
 643  */
 644
 645 struct lm_lockstruct {
 646         int ls_jid;
 647         unsigned int ls_first;
 648         const struct lm_lockops *ls_ops;
 649         dlm_lockspace_t *ls_dlm;
 650
 651         int ls_recover_jid_done;   /* These two are deprecated, */
 652         int ls_recover_jid_status; /* used previously by gfs_controld */
 653
 654         struct dlm_lksb ls_mounted_lksb; /* mounted_lock */
 655         struct dlm_lksb ls_control_lksb; /* control_lock */
 656         char ls_control_lvb[GDLM_LVB_SIZE]; /* control_lock lvb */
 657         struct completion ls_sync_wait; /* {control,mounted}_{lock,unlock} */
 658         char *ls_lvb_bits;
 659
 660         spinlock_t ls_recover_spin; /* protects following fields */
 661         unsigned long ls_recover_flags; /* DFL_ */
 662         uint32_t ls_recover_mount; /* gen in first recover_done cb */
 663         uint32_t ls_recover_start; /* gen in last recover_done cb */
 664         uint32_t ls_recover_block; /* copy recover_start in last recover_prep */
 665         uint32_t ls_recover_size; /* size of recover_submit, recover_result */
 666         uint32_t *ls_recover_submit; /* gen in last recover_slot cb per jid */
 667         uint32_t *ls_recover_result; /* result of last jid recovery */
 668 };
 669
 670 struct gfs2_pcpu_lkstats {
 671         /* One struct for each glock type */
 672         struct gfs2_lkstats lkstats[10];
 673 };
 674
 675 /* List of local (per node) statfs inodes */
 676 struct local_statfs_inode {
 677         struct list_head si_list;
 678         struct inode *si_sc_inode;
 679         unsigned int si_jid; /* journal id this statfs inode corresponds to */
 680 };
 681
 682 struct gfs2_sbd {
 683         struct super_block *sd_vfs;
 684         struct gfs2_pcpu_lkstats __percpu *sd_lkstats;
 685         struct kobject sd_kobj;
 686         struct completion sd_kobj_unregister;
 687         unsigned long sd_flags; /* SDF_... */
 688         struct gfs2_sb_host sd_sb;
 689
 690         /* Constants computed on mount */
 691
 692         u32 sd_fsb2bb;
 693         u32 sd_fsb2bb_shift;
 694         u32 sd_diptrs;  /* Number of pointers in a dinode */
 695         u32 sd_inptrs;  /* Number of pointers in a indirect block */
 696         u32 sd_ldptrs;  /* Number of pointers in a log descriptor block */
 697         u32 sd_jbsize;  /* Size of a journaled data block */
 698         u32 sd_hash_bsize;      /* sizeof(exhash block) */
 699         u32 sd_hash_bsize_shift;
 700         u32 sd_hash_ptrs;       /* Number of pointers in a hash block */
 701         u32 sd_qc_per_block;
 702         u32 sd_blocks_per_bitmap;
 703         u32 sd_max_dirres;      /* Max blocks needed to add a directory entry */
 704         u32 sd_max_height;      /* Max height of a file's metadata tree */
 705         u64 sd_heightsize[GFS2_MAX_META_HEIGHT + 1];
 706         u32 sd_max_dents_per_leaf; /* Max number of dirents in a leaf block */
 707
 708         struct gfs2_args sd_args;       /* Mount arguments */
 709         struct gfs2_tune sd_tune;       /* Filesystem tuning structure */
 710
 711         /* Lock Stuff */
 712
 713         struct lm_lockstruct sd_lockstruct;
 714         struct gfs2_holder sd_live_gh;
 715         struct gfs2_glock *sd_rename_gl;
 716         struct gfs2_glock *sd_freeze_gl;
 717         struct work_struct sd_freeze_work;
 718         wait_queue_head_t sd_kill_wait;
 719         wait_queue_head_t sd_async_glock_wait;
 720         atomic_t sd_glock_disposal;
 721         struct completion sd_locking_init;
 722         struct completion sd_wdack;
 723         struct delayed_work sd_control_work;
 724
 725         /* Inode Stuff */
 726
 727         struct dentry *sd_master_dir;
 728         struct dentry *sd_root_dir;
 729
 730         struct inode *sd_jindex;
 731         struct inode *sd_statfs_inode;
 732         struct inode *sd_sc_inode;
 733         struct list_head sd_sc_inodes_list;
 734         struct inode *sd_qc_inode;
 735         struct inode *sd_rindex;
 736         struct inode *sd_quota_inode;
 737
 738         /* StatFS stuff */
 739
 740         spinlock_t sd_statfs_spin;
 741         struct gfs2_statfs_change_host sd_statfs_master;
 742         struct gfs2_statfs_change_host sd_statfs_local;
 743         int sd_statfs_force_sync;
 744
 745         /* Resource group stuff */
 746
 747         int sd_rindex_uptodate;
 748         spinlock_t sd_rindex_spin;
 749         struct rb_root sd_rindex_tree;
 750         unsigned int sd_rgrps;
 751         unsigned int sd_max_rg_data;
 752
 753         /* Journal index stuff */
 754
 755         struct list_head sd_jindex_list;
 756         spinlock_t sd_jindex_spin;
 757         struct mutex sd_jindex_mutex;
 758         unsigned int sd_journals;
 759
 760         struct gfs2_jdesc *sd_jdesc;
 761         struct gfs2_holder sd_journal_gh;
 762         struct gfs2_holder sd_jinode_gh;
 763         struct gfs2_glock *sd_jinode_gl;
 764
 765         struct gfs2_holder sd_sc_gh;
 766         struct buffer_head *sd_sc_bh;
 767         struct gfs2_holder sd_qc_gh;
 768
 769         struct completion sd_journal_ready;
 770
 771         /* Workqueue stuff */
 772
 773         struct workqueue_struct *sd_glock_wq;
 774         struct workqueue_struct *sd_delete_wq;
 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_sync_mutex;
 786         wait_queue_head_t sd_quota_wait;
 787
 788         unsigned int sd_quota_slots;
 789         unsigned long *sd_quota_bitmap;
 790         spinlock_t sd_bitmap_lock;
 791
 792         u64 sd_quota_sync_gen;
 793
 794         /* Log stuff */
 795
 796         struct address_space sd_aspace;
 797
 798         spinlock_t sd_log_lock;
 799
 800         struct gfs2_trans *sd_log_tr;
 801         unsigned int sd_log_blks_reserved;
 802
 803         atomic_t sd_log_pinned;
 804         unsigned int sd_log_num_revoke;
 805
 806         struct list_head sd_log_revokes;
 807         struct list_head sd_log_ordered;
 808         spinlock_t sd_ordered_lock;
 809
 810         atomic_t sd_log_thresh1;
 811         atomic_t sd_log_thresh2;
 812         atomic_t sd_log_blks_free;
 813         atomic_t sd_log_blks_needed;
 814         atomic_t sd_log_revokes_available;
 815         wait_queue_head_t sd_log_waitq;
 816         wait_queue_head_t sd_logd_waitq;
 817
 818         u64 sd_log_sequence;
 819         int sd_log_idle;
 820
 821         struct rw_semaphore sd_log_flush_lock;
 822         atomic_t sd_log_in_flight;
 823         wait_queue_head_t sd_log_flush_wait;
 824         int sd_log_error; /* First log error */
 825         wait_queue_head_t sd_withdraw_wait;
 826
 827         unsigned int sd_log_tail;
 828         unsigned int sd_log_flush_tail;
 829         unsigned int sd_log_head;
 830         unsigned int sd_log_flush_head;
 831
 832         spinlock_t sd_ail_lock;
 833         struct list_head sd_ail1_list;
 834         struct list_head sd_ail2_list;
 835
 836         /* For quiescing the filesystem */
 837         struct gfs2_holder sd_freeze_gh;
 838         struct mutex sd_freeze_mutex;
 839         struct list_head sd_dead_glocks;
 840
 841         char sd_fsname[GFS2_FSNAME_LEN + 3 * sizeof(int) + 2];
 842         char sd_table_name[GFS2_FSNAME_LEN];
 843         char sd_proto_name[GFS2_FSNAME_LEN];
 844
 845         /* Debugging crud */
 846
 847         unsigned long sd_last_warning;
 848         struct dentry *debugfs_dir;    /* debugfs directory */
 849         unsigned long sd_glock_dqs_held;
 850 };
 851
 852 static inline void gfs2_glstats_inc(struct gfs2_glock *gl, int which)
 853 {
 854         gl->gl_stats.stats[which]++;
 855 }
 856
 857 static inline void gfs2_sbstats_inc(const struct gfs2_glock *gl, int which)
 858 {
 859         const struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
 860         preempt_disable();
 861         this_cpu_ptr(sdp->sd_lkstats)->lkstats[gl->gl_name.ln_type].stats[which]++;
 862         preempt_enable();
 863 }
 864
 865 struct gfs2_rgrpd *gfs2_glock2rgrp(struct gfs2_glock *gl);
 866
 867 static inline unsigned gfs2_max_stuffed_size(const struct gfs2_inode *ip)
 868 {
 869         return GFS2_SB(&ip->i_inode)->sd_sb.sb_bsize - sizeof(struct gfs2_dinode);
 870 }
 871
 872 #endif /* __INCORE_DOT_H__ */
 873