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/kobject.h>
  15 #include <linux/workqueue.h>
  16 #include <linux/dlm.h>
  17 #include <linux/buffer_head.h>
  18 #include <linux/rcupdate.h>
  19 #include <linux/rculist_bl.h>
  20 #include <linux/completion.h>
  21 #include <linux/rbtree.h>
  22 #include <linux/ktime.h>
  23 #include <linux/percpu.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_ail;
  35 struct gfs2_jdesc;
  36 struct gfs2_sbd;
  37 struct lm_lockops;
  38
  39 typedef void (*gfs2_glop_bh_t) (struct gfs2_glock *gl, unsigned int ret);
  40
  41 struct gfs2_log_header_host {
  42         u64 lh_sequence;        /* Sequence number of this transaction */
  43         u32 lh_flags;           /* GFS2_LOG_HEAD_... */
  44         u32 lh_tail;            /* Block number of log tail */
  45         u32 lh_blkno;
  46         u32 lh_hash;
  47 };
  48
  49 /*
  50  * Structure of operations that are associated with each
  51  * type of element in the log.
  52  */
  53
  54 struct gfs2_log_operations {
  55         void (*lo_add) (struct gfs2_sbd *sdp, struct gfs2_bufdata *bd);
  56         void (*lo_before_commit) (struct gfs2_sbd *sdp);
  57         void (*lo_after_commit) (struct gfs2_sbd *sdp, struct gfs2_ail *ai);
  58         void (*lo_before_scan) (struct gfs2_jdesc *jd,
  59                                 struct gfs2_log_header_host *head, int pass);
  60         int (*lo_scan_elements) (struct gfs2_jdesc *jd, unsigned int start,
  61                                  struct gfs2_log_descriptor *ld, __be64 *ptr,
  62                                  int pass);
  63         void (*lo_after_scan) (struct gfs2_jdesc *jd, int error, int pass);
  64         const char *lo_name;
  65 };
  66
  67 #define GBF_FULL 1
  68
  69 struct gfs2_bitmap {
  70         struct buffer_head *bi_bh;
  71         char *bi_clone;
  72         unsigned long bi_flags;
  73         u32 bi_offset;
  74         u32 bi_start;
  75         u32 bi_len;
  76 };
  77
  78 struct gfs2_rgrpd {
  79         struct rb_node rd_node;         /* Link with superblock */
  80         struct gfs2_glock *rd_gl;       /* Glock for this rgrp */
  81         u64 rd_addr;                    /* grp block disk address */
  82         u64 rd_data0;                   /* first data location */
  83         u32 rd_length;                  /* length of rgrp header in fs blocks */
  84         u32 rd_data;                    /* num of data blocks in rgrp */
  85         u32 rd_bitbytes;                /* number of bytes in data bitmaps */
  86         u32 rd_free;
  87         u32 rd_reserved;                /* number of blocks reserved */
  88         u32 rd_free_clone;
  89         u32 rd_dinodes;
  90         u64 rd_igeneration;
  91         struct gfs2_bitmap *rd_bits;
  92         struct gfs2_sbd *rd_sbd;
  93         struct gfs2_rgrp_lvb *rd_rgl;
  94         u32 rd_last_alloc;
  95         u32 rd_flags;
  96 #define GFS2_RDF_CHECK          0x10000000 /* check for unlinked inodes */
  97 #define GFS2_RDF_UPTODATE       0x20000000 /* rg is up to date */
  98 #define GFS2_RDF_ERROR          0x40000000 /* error in rg */
  99 #define GFS2_RDF_MASK           0xf0000000 /* mask for internal flags */
 100         spinlock_t rd_rsspin;           /* protects reservation related vars */
 101         struct rb_root rd_rstree;       /* multi-block reservation tree */
 102         u32 rd_rs_cnt;                  /* count of current reservations */
 103 };
 104
 105 enum gfs2_state_bits {
 106         BH_Pinned = BH_PrivateStart,
 107         BH_Escaped = BH_PrivateStart + 1,
 108         BH_Zeronew = BH_PrivateStart + 2,
 109 };
 110
 111 BUFFER_FNS(Pinned, pinned)
 112 TAS_BUFFER_FNS(Pinned, pinned)
 113 BUFFER_FNS(Escaped, escaped)
 114 TAS_BUFFER_FNS(Escaped, escaped)
 115 BUFFER_FNS(Zeronew, zeronew)
 116 TAS_BUFFER_FNS(Zeronew, zeronew)
 117
 118 struct gfs2_bufdata {
 119         struct buffer_head *bd_bh;
 120         struct gfs2_glock *bd_gl;
 121         u64 bd_blkno;
 122
 123         struct list_head bd_list;
 124         const struct gfs2_log_operations *bd_ops;
 125
 126         struct gfs2_ail *bd_ail;
 127         struct list_head bd_ail_st_list;
 128         struct list_head bd_ail_gl_list;
 129 };
 130
 131 /*
 132  * Internally, we prefix things with gdlm_ and GDLM_ (for gfs-dlm) since a
 133  * prefix of lock_dlm_ gets awkward.
 134  */
 135
 136 #define GDLM_STRNAME_BYTES      25
 137 #define GDLM_LVB_SIZE           32
 138
 139 /*
 140  * ls_recover_flags:
 141  *
 142  * DFL_BLOCK_LOCKS: dlm is in recovery and will grant locks that had been
 143  * held by failed nodes whose journals need recovery.  Those locks should
 144  * only be used for journal recovery until the journal recovery is done.
 145  * This is set by the dlm recover_prep callback and cleared by the
 146  * gfs2_control thread when journal recovery is complete.  To avoid
 147  * races between recover_prep setting and gfs2_control clearing, recover_spin
 148  * is held while changing this bit and reading/writing recover_block
 149  * and recover_start.
 150  *
 151  * DFL_NO_DLM_OPS: dlm lockspace ops/callbacks are not being used.
 152  *
 153  * DFL_FIRST_MOUNT: this node is the first to mount this fs and is doing
 154  * recovery of all journals before allowing other nodes to mount the fs.
 155  * This is cleared when FIRST_MOUNT_DONE is set.
 156  *
 157  * DFL_FIRST_MOUNT_DONE: this node was the first mounter, and has finished
 158  * recovery of all journals, and now allows other nodes to mount the fs.
 159  *
 160  * DFL_MOUNT_DONE: gdlm_mount has completed successfully and cleared
 161  * BLOCK_LOCKS for the first time.  The gfs2_control thread should now
 162  * control clearing BLOCK_LOCKS for further recoveries.
 163  *
 164  * DFL_UNMOUNT: gdlm_unmount sets to keep sdp off gfs2_control_wq.
 165  *
 166  * DFL_DLM_RECOVERY: set while dlm is in recovery, between recover_prep()
 167  * and recover_done(), i.e. set while recover_block == recover_start.
 168  */
 169
 170 enum {
 171         DFL_BLOCK_LOCKS         = 0,
 172         DFL_NO_DLM_OPS          = 1,
 173         DFL_FIRST_MOUNT         = 2,
 174         DFL_FIRST_MOUNT_DONE    = 3,
 175         DFL_MOUNT_DONE          = 4,
 176         DFL_UNMOUNT             = 5,
 177         DFL_DLM_RECOVERY        = 6,
 178 };
 179
 180 struct lm_lockname {
 181         u64 ln_number;
 182         unsigned int ln_type;
 183 };
 184
 185 #define lm_name_equal(name1, name2) \
 186         (((name1)->ln_number == (name2)->ln_number) && \
 187          ((name1)->ln_type == (name2)->ln_type))
 188
 189
 190 struct gfs2_glock_operations {
 191         void (*go_xmote_th) (struct gfs2_glock *gl);
 192         int (*go_xmote_bh) (struct gfs2_glock *gl, struct gfs2_holder *gh);
 193         void (*go_inval) (struct gfs2_glock *gl, int flags);
 194         int (*go_demote_ok) (const struct gfs2_glock *gl);
 195         int (*go_lock) (struct gfs2_holder *gh);
 196         void (*go_unlock) (struct gfs2_holder *gh);
 197         int (*go_dump)(struct seq_file *seq, const struct gfs2_glock *gl);
 198         void (*go_callback) (struct gfs2_glock *gl);
 199         const int go_type;
 200         const unsigned long go_flags;
 201 #define GLOF_ASPACE 1
 202 };
 203
 204 enum {
 205         GFS2_LKS_SRTT = 0,      /* Non blocking smoothed round trip time */
 206         GFS2_LKS_SRTTVAR = 1,   /* Non blocking smoothed variance */
 207         GFS2_LKS_SRTTB = 2,     /* Blocking smoothed round trip time */
 208         GFS2_LKS_SRTTVARB = 3,  /* Blocking smoothed variance */
 209         GFS2_LKS_SIRT = 4,      /* Smoothed Inter-request time */
 210         GFS2_LKS_SIRTVAR = 5,   /* Smoothed Inter-request variance */
 211         GFS2_LKS_DCOUNT = 6,    /* Count of dlm requests */
 212         GFS2_LKS_QCOUNT = 7,    /* Count of gfs2_holder queues */
 213         GFS2_NR_LKSTATS
 214 };
 215
 216 struct gfs2_lkstats {
 217         s64 stats[GFS2_NR_LKSTATS];
 218 };
 219
 220 enum {
 221         /* States */
 222         HIF_HOLDER              = 6,  /* Set for gh that "holds" the glock */
 223         HIF_FIRST               = 7,
 224         HIF_WAIT                = 10,
 225 };
 226
 227 struct gfs2_holder {
 228         struct list_head gh_list;
 229
 230         struct gfs2_glock *gh_gl;
 231         struct pid *gh_owner_pid;
 232         unsigned int gh_state;
 233         unsigned gh_flags;
 234
 235         int gh_error;
 236         unsigned long gh_iflags; /* HIF_... */
 237         unsigned long gh_ip;
 238 };
 239
 240 /* Resource group multi-block reservation, in order of appearance:
 241
 242    Step 1. Function prepares to write, allocates a mb, sets the size hint.
 243    Step 2. User calls inplace_reserve to target an rgrp, sets the rgrp info
 244    Step 3. Function get_local_rgrp locks the rgrp, determines which bits to use
 245    Step 4. Bits are assigned from the rgrp based on either the reservation
 246            or wherever it can.
 247 */
 248
 249 struct gfs2_blkreserv {
 250         /* components used during write (step 1): */
 251         atomic_t rs_sizehint;         /* hint of the write size */
 252
 253         /* components used during get_local_rgrp (step 3): */
 254         struct gfs2_rgrpd *rs_rgd;    /* pointer to the gfs2_rgrpd */
 255         struct gfs2_holder rs_rgd_gh; /* Filled in by get_local_rgrp */
 256         struct rb_node rs_node;       /* link to other block reservations */
 257
 258         /* components used during block searches and assignments (step 4): */
 259         struct gfs2_bitmap *rs_bi;    /* bitmap for the current allocation */
 260         u32 rs_biblk;                 /* start block relative to the bi */
 261         u32 rs_free;                  /* how many blocks are still free */
 262
 263         /* ancillary quota stuff */
 264         struct gfs2_quota_data *rs_qa_qd[2 * MAXQUOTAS];
 265         struct gfs2_holder rs_qa_qd_ghs[2 * MAXQUOTAS];
 266         unsigned int rs_qa_qd_num;
 267 };
 268
 269 enum {
 270         GLF_LOCK                        = 1,
 271         GLF_DEMOTE                      = 3,
 272         GLF_PENDING_DEMOTE              = 4,
 273         GLF_DEMOTE_IN_PROGRESS          = 5,
 274         GLF_DIRTY                       = 6,
 275         GLF_LFLUSH                      = 7,
 276         GLF_INVALIDATE_IN_PROGRESS      = 8,
 277         GLF_REPLY_PENDING               = 9,
 278         GLF_INITIAL                     = 10,
 279         GLF_FROZEN                      = 11,
 280         GLF_QUEUED                      = 12,
 281         GLF_LRU                         = 13,
 282         GLF_OBJECT                      = 14, /* Used only for tracing */
 283         GLF_BLOCKING                    = 15,
 284 };
 285
 286 struct gfs2_glock {
 287         struct hlist_bl_node gl_list;
 288         struct gfs2_sbd *gl_sbd;
 289         unsigned long gl_flags;         /* GLF_... */
 290         struct lm_lockname gl_name;
 291         atomic_t gl_ref;
 292
 293         spinlock_t gl_spin;
 294
 295         /* State fields protected by gl_spin */
 296         unsigned int gl_state:2,        /* Current state */
 297                      gl_target:2,       /* Target state */
 298                      gl_demote_state:2, /* State requested by remote node */
 299                      gl_req:2,          /* State in last dlm request */
 300                      gl_reply:8;        /* Last reply from the dlm */
 301
 302         unsigned int gl_hash;
 303         unsigned long gl_demote_time; /* time of first demote request */
 304         long gl_hold_time;
 305         struct list_head gl_holders;
 306
 307         const struct gfs2_glock_operations *gl_ops;
 308         ktime_t gl_dstamp;
 309         struct gfs2_lkstats gl_stats;
 310         struct dlm_lksb gl_lksb;
 311         char gl_lvb[32];
 312         unsigned long gl_tchange;
 313         void *gl_object;
 314
 315         struct list_head gl_lru;
 316         struct list_head gl_ail_list;
 317         atomic_t gl_ail_count;
 318         atomic_t gl_revokes;
 319         struct delayed_work gl_work;
 320         struct work_struct gl_delete;
 321         struct rcu_head gl_rcu;
 322 };
 323
 324 #define GFS2_MIN_LVB_SIZE 32    /* Min size of LVB that gfs2 supports */
 325
 326 enum {
 327         GIF_INVALID             = 0,
 328         GIF_QD_LOCKED           = 1,
 329         GIF_ALLOC_FAILED        = 2,
 330         GIF_SW_PAGED            = 3,
 331 };
 332
 333 struct gfs2_inode {
 334         struct inode i_inode;
 335         u64 i_no_addr;
 336         u64 i_no_formal_ino;
 337         u64 i_generation;
 338         u64 i_eattr;
 339         unsigned long i_flags;          /* GIF_... */
 340         struct gfs2_glock *i_gl; /* Move into i_gh? */
 341         struct gfs2_holder i_iopen_gh;
 342         struct gfs2_holder i_gh; /* for prepare/commit_write only */
 343         struct gfs2_blkreserv *i_res; /* rgrp multi-block reservation */
 344         struct gfs2_rgrpd *i_rgd;
 345         u64 i_goal;     /* goal block for allocations */
 346         struct rw_semaphore i_rw_mutex;
 347         struct list_head i_trunc_list;
 348         __be64 *i_hash_cache;
 349         u32 i_entries;
 350         u32 i_diskflags;
 351         u8 i_height;
 352         u8 i_depth;
 353 };
 354
 355 /*
 356  * Since i_inode is the first element of struct gfs2_inode,
 357  * this is effectively a cast.
 358  */
 359 static inline struct gfs2_inode *GFS2_I(struct inode *inode)
 360 {
 361         return container_of(inode, struct gfs2_inode, i_inode);
 362 }
 363
 364 static inline struct gfs2_sbd *GFS2_SB(const struct inode *inode)
 365 {
 366         return inode->i_sb->s_fs_info;
 367 }
 368
 369 struct gfs2_file {
 370         struct mutex f_fl_mutex;
 371         struct gfs2_holder f_fl_gh;
 372 };
 373
 374 struct gfs2_revoke_replay {
 375         struct list_head rr_list;
 376         u64 rr_blkno;
 377         unsigned int rr_where;
 378 };
 379
 380 enum {
 381         QDF_USER                = 0,
 382         QDF_CHANGE              = 1,
 383         QDF_LOCKED              = 2,
 384         QDF_REFRESH             = 3,
 385 };
 386
 387 struct gfs2_quota_data {
 388         struct list_head qd_list;
 389         struct list_head qd_reclaim;
 390
 391         atomic_t qd_count;
 392
 393         u32 qd_id;
 394         unsigned long qd_flags;         /* QDF_... */
 395
 396         s64 qd_change;
 397         s64 qd_change_sync;
 398
 399         unsigned int qd_slot;
 400         unsigned int qd_slot_count;
 401
 402         struct buffer_head *qd_bh;
 403         struct gfs2_quota_change *qd_bh_qc;
 404         unsigned int qd_bh_count;
 405
 406         struct gfs2_glock *qd_gl;
 407         struct gfs2_quota_lvb qd_qb;
 408
 409         u64 qd_sync_gen;
 410         unsigned long qd_last_warn;
 411 };
 412
 413 struct gfs2_trans {
 414         unsigned long tr_ip;
 415
 416         unsigned int tr_blocks;
 417         unsigned int tr_revokes;
 418         unsigned int tr_reserved;
 419
 420         struct gfs2_holder tr_t_gh;
 421
 422         int tr_touched;
 423
 424         unsigned int tr_num_buf_new;
 425         unsigned int tr_num_databuf_new;
 426         unsigned int tr_num_buf_rm;
 427         unsigned int tr_num_databuf_rm;
 428         unsigned int tr_num_revoke;
 429         unsigned int tr_num_revoke_rm;
 430 };
 431
 432 struct gfs2_ail {
 433         struct list_head ai_list;
 434
 435         unsigned int ai_first;
 436         struct list_head ai_ail1_list;
 437         struct list_head ai_ail2_list;
 438 };
 439
 440 struct gfs2_journal_extent {
 441         struct list_head extent_list;
 442
 443         unsigned int lblock; /* First logical block */
 444         u64 dblock; /* First disk block */
 445         u64 blocks;
 446 };
 447
 448 struct gfs2_jdesc {
 449         struct list_head jd_list;
 450         struct list_head extent_list;
 451         struct work_struct jd_work;
 452         struct inode *jd_inode;
 453         unsigned long jd_flags;
 454 #define JDF_RECOVERY 1
 455         unsigned int jd_jid;
 456         unsigned int jd_blocks;
 457         int jd_recover_error;
 458 };
 459
 460 struct gfs2_statfs_change_host {
 461         s64 sc_total;
 462         s64 sc_free;
 463         s64 sc_dinodes;
 464 };
 465
 466 #define GFS2_QUOTA_DEFAULT      GFS2_QUOTA_OFF
 467 #define GFS2_QUOTA_OFF          0
 468 #define GFS2_QUOTA_ACCOUNT      1
 469 #define GFS2_QUOTA_ON           2
 470
 471 #define GFS2_DATA_DEFAULT       GFS2_DATA_ORDERED
 472 #define GFS2_DATA_WRITEBACK     1
 473 #define GFS2_DATA_ORDERED       2
 474
 475 #define GFS2_ERRORS_DEFAULT     GFS2_ERRORS_WITHDRAW
 476 #define GFS2_ERRORS_WITHDRAW    0
 477 #define GFS2_ERRORS_CONTINUE    1 /* place holder for future feature */
 478 #define GFS2_ERRORS_RO          2 /* place holder for future feature */
 479 #define GFS2_ERRORS_PANIC       3
 480
 481 struct gfs2_args {
 482         char ar_lockproto[GFS2_LOCKNAME_LEN];   /* Name of the Lock Protocol */
 483         char ar_locktable[GFS2_LOCKNAME_LEN];   /* Name of the Lock Table */
 484         char ar_hostdata[GFS2_LOCKNAME_LEN];    /* Host specific data */
 485         unsigned int ar_spectator:1;            /* Don't get a journal */
 486         unsigned int ar_localflocks:1;          /* Let the VFS do flock|fcntl */
 487         unsigned int ar_debug:1;                /* Oops on errors */
 488         unsigned int ar_posix_acl:1;            /* Enable posix acls */
 489         unsigned int ar_quota:2;                /* off/account/on */
 490         unsigned int ar_suiddir:1;              /* suiddir support */
 491         unsigned int ar_data:2;                 /* ordered/writeback */
 492         unsigned int ar_meta:1;                 /* mount metafs */
 493         unsigned int ar_discard:1;              /* discard requests */
 494         unsigned int ar_errors:2;               /* errors=withdraw | panic */
 495         unsigned int ar_nobarrier:1;            /* do not send barriers */
 496         unsigned int ar_rgrplvb:1;              /* use lvbs for rgrp info */
 497         int ar_commit;                          /* Commit interval */
 498         int ar_statfs_quantum;                  /* The fast statfs interval */
 499         int ar_quota_quantum;                   /* The quota interval */
 500         int ar_statfs_percent;                  /* The % change to force sync */
 501 };
 502
 503 struct gfs2_tune {
 504         spinlock_t gt_spin;
 505
 506         unsigned int gt_logd_secs;
 507
 508         unsigned int gt_quota_simul_sync; /* Max quotavals to sync at once */
 509         unsigned int gt_quota_warn_period; /* Secs between quota warn msgs */
 510         unsigned int gt_quota_scale_num; /* Numerator */
 511         unsigned int gt_quota_scale_den; /* Denominator */
 512         unsigned int gt_quota_quantum; /* Secs between syncs to quota file */
 513         unsigned int gt_new_files_jdata;
 514         unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */
 515         unsigned int gt_complain_secs;
 516         unsigned int gt_statfs_quantum;
 517         unsigned int gt_statfs_slow;
 518 };
 519
 520 enum {
 521         SDF_JOURNAL_CHECKED     = 0,
 522         SDF_JOURNAL_LIVE        = 1,
 523         SDF_SHUTDOWN            = 2,
 524         SDF_NOBARRIERS          = 3,
 525         SDF_NORECOVERY          = 4,
 526         SDF_DEMOTE              = 5,
 527         SDF_NOJOURNALID         = 6,
 528         SDF_RORECOVERY          = 7, /* read only recovery */
 529 };
 530
 531 #define GFS2_FSNAME_LEN         256
 532
 533 struct gfs2_inum_host {
 534         u64 no_formal_ino;
 535         u64 no_addr;
 536 };
 537
 538 struct gfs2_sb_host {
 539         u32 sb_magic;
 540         u32 sb_type;
 541         u32 sb_format;
 542
 543         u32 sb_fs_format;
 544         u32 sb_multihost_format;
 545         u32 sb_bsize;
 546         u32 sb_bsize_shift;
 547
 548         struct gfs2_inum_host sb_master_dir;
 549         struct gfs2_inum_host sb_root_dir;
 550
 551         char sb_lockproto[GFS2_LOCKNAME_LEN];
 552         char sb_locktable[GFS2_LOCKNAME_LEN];
 553 };
 554
 555 /*
 556  * lm_mount() return values
 557  *
 558  * ls_jid - the journal ID this node should use
 559  * ls_first - this node is the first to mount the file system
 560  * ls_lockspace - lock module's context for this file system
 561  * ls_ops - lock module's functions
 562  */
 563
 564 struct lm_lockstruct {
 565         int ls_jid;
 566         unsigned int ls_first;
 567         const struct lm_lockops *ls_ops;
 568         dlm_lockspace_t *ls_dlm;
 569
 570         int ls_recover_jid_done;   /* These two are deprecated, */
 571         int ls_recover_jid_status; /* used previously by gfs_controld */
 572
 573         struct dlm_lksb ls_mounted_lksb; /* mounted_lock */
 574         struct dlm_lksb ls_control_lksb; /* control_lock */
 575         char ls_control_lvb[GDLM_LVB_SIZE]; /* control_lock lvb */
 576         struct completion ls_sync_wait; /* {control,mounted}_{lock,unlock} */
 577
 578         spinlock_t ls_recover_spin; /* protects following fields */
 579         unsigned long ls_recover_flags; /* DFL_ */
 580         uint32_t ls_recover_mount; /* gen in first recover_done cb */
 581         uint32_t ls_recover_start; /* gen in last recover_done cb */
 582         uint32_t ls_recover_block; /* copy recover_start in last recover_prep */
 583         uint32_t ls_recover_size; /* size of recover_submit, recover_result */
 584         uint32_t *ls_recover_submit; /* gen in last recover_slot cb per jid */
 585         uint32_t *ls_recover_result; /* result of last jid recovery */
 586 };
 587
 588 struct gfs2_pcpu_lkstats {
 589         /* One struct for each glock type */
 590         struct gfs2_lkstats lkstats[10];
 591 };
 592
 593 struct gfs2_sbd {
 594         struct super_block *sd_vfs;
 595         struct gfs2_pcpu_lkstats __percpu *sd_lkstats;
 596         struct kobject sd_kobj;
 597         unsigned long sd_flags; /* SDF_... */
 598         struct gfs2_sb_host sd_sb;
 599
 600         /* Constants computed on mount */
 601
 602         u32 sd_fsb2bb;
 603         u32 sd_fsb2bb_shift;
 604         u32 sd_diptrs;  /* Number of pointers in a dinode */
 605         u32 sd_inptrs;  /* Number of pointers in a indirect block */
 606         u32 sd_jbsize;  /* Size of a journaled data block */
 607         u32 sd_hash_bsize;      /* sizeof(exhash block) */
 608         u32 sd_hash_bsize_shift;
 609         u32 sd_hash_ptrs;       /* Number of pointers in a hash block */
 610         u32 sd_qc_per_block;
 611         u32 sd_max_dirres;      /* Max blocks needed to add a directory entry */
 612         u32 sd_max_height;      /* Max height of a file's metadata tree */
 613         u64 sd_heightsize[GFS2_MAX_META_HEIGHT + 1];
 614         u32 sd_max_jheight; /* Max height of journaled file's meta tree */
 615         u64 sd_jheightsize[GFS2_MAX_META_HEIGHT + 1];
 616
 617         struct gfs2_args sd_args;       /* Mount arguments */
 618         struct gfs2_tune sd_tune;       /* Filesystem tuning structure */
 619
 620         /* Lock Stuff */
 621
 622         struct lm_lockstruct sd_lockstruct;
 623         struct gfs2_holder sd_live_gh;
 624         struct gfs2_glock *sd_rename_gl;
 625         struct gfs2_glock *sd_trans_gl;
 626         wait_queue_head_t sd_glock_wait;
 627         atomic_t sd_glock_disposal;
 628         struct completion sd_locking_init;
 629         struct delayed_work sd_control_work;
 630
 631         /* Inode Stuff */
 632
 633         struct dentry *sd_master_dir;
 634         struct dentry *sd_root_dir;
 635
 636         struct inode *sd_jindex;
 637         struct inode *sd_statfs_inode;
 638         struct inode *sd_sc_inode;
 639         struct inode *sd_qc_inode;
 640         struct inode *sd_rindex;
 641         struct inode *sd_quota_inode;
 642
 643         /* StatFS stuff */
 644
 645         spinlock_t sd_statfs_spin;
 646         struct gfs2_statfs_change_host sd_statfs_master;
 647         struct gfs2_statfs_change_host sd_statfs_local;
 648         int sd_statfs_force_sync;
 649
 650         /* Resource group stuff */
 651
 652         int sd_rindex_uptodate;
 653         spinlock_t sd_rindex_spin;
 654         struct rb_root sd_rindex_tree;
 655         unsigned int sd_rgrps;
 656         unsigned int sd_max_rg_data;
 657
 658         /* Journal index stuff */
 659
 660         struct list_head sd_jindex_list;
 661         spinlock_t sd_jindex_spin;
 662         struct mutex sd_jindex_mutex;
 663         unsigned int sd_journals;
 664
 665         struct gfs2_jdesc *sd_jdesc;
 666         struct gfs2_holder sd_journal_gh;
 667         struct gfs2_holder sd_jinode_gh;
 668
 669         struct gfs2_holder sd_sc_gh;
 670         struct gfs2_holder sd_qc_gh;
 671
 672         /* Daemon stuff */
 673
 674         struct task_struct *sd_logd_process;
 675         struct task_struct *sd_quotad_process;
 676
 677         /* Quota stuff */
 678
 679         struct list_head sd_quota_list;
 680         atomic_t sd_quota_count;
 681         struct mutex sd_quota_mutex;
 682         wait_queue_head_t sd_quota_wait;
 683         struct list_head sd_trunc_list;
 684         spinlock_t sd_trunc_lock;
 685
 686         unsigned int sd_quota_slots;
 687         unsigned int sd_quota_chunks;
 688         unsigned char **sd_quota_bitmap;
 689
 690         u64 sd_quota_sync_gen;
 691
 692         /* Log stuff */
 693
 694         spinlock_t sd_log_lock;
 695
 696         unsigned int sd_log_blks_reserved;
 697         unsigned int sd_log_commited_buf;
 698         unsigned int sd_log_commited_databuf;
 699         int sd_log_commited_revoke;
 700
 701         atomic_t sd_log_pinned;
 702         unsigned int sd_log_num_buf;
 703         unsigned int sd_log_num_revoke;
 704         unsigned int sd_log_num_rg;
 705         unsigned int sd_log_num_databuf;
 706
 707         struct list_head sd_log_le_buf;
 708         struct list_head sd_log_le_revoke;
 709         struct list_head sd_log_le_databuf;
 710         struct list_head sd_log_le_ordered;
 711
 712         atomic_t sd_log_thresh1;
 713         atomic_t sd_log_thresh2;
 714         atomic_t sd_log_blks_free;
 715         wait_queue_head_t sd_log_waitq;
 716         wait_queue_head_t sd_logd_waitq;
 717
 718         u64 sd_log_sequence;
 719         unsigned int sd_log_head;
 720         unsigned int sd_log_tail;
 721         int sd_log_idle;
 722
 723         struct rw_semaphore sd_log_flush_lock;
 724         atomic_t sd_log_in_flight;
 725         struct bio *sd_log_bio;
 726         wait_queue_head_t sd_log_flush_wait;
 727         int sd_log_error;
 728
 729         unsigned int sd_log_flush_head;
 730         u64 sd_log_flush_wrapped;
 731
 732         spinlock_t sd_ail_lock;
 733         struct list_head sd_ail1_list;
 734         struct list_head sd_ail2_list;
 735
 736         /* Replay stuff */
 737
 738         struct list_head sd_revoke_list;
 739         unsigned int sd_replay_tail;
 740
 741         unsigned int sd_found_blocks;
 742         unsigned int sd_found_revokes;
 743         unsigned int sd_replayed_blocks;
 744
 745         /* For quiescing the filesystem */
 746
 747         struct gfs2_holder sd_freeze_gh;
 748         struct mutex sd_freeze_lock;
 749         unsigned int sd_freeze_count;
 750
 751         char sd_fsname[GFS2_FSNAME_LEN];
 752         char sd_table_name[GFS2_FSNAME_LEN];
 753         char sd_proto_name[GFS2_FSNAME_LEN];
 754
 755         /* Debugging crud */
 756
 757         unsigned long sd_last_warning;
 758         struct dentry *debugfs_dir;    /* debugfs directory */
 759         struct dentry *debugfs_dentry_glocks;
 760         struct dentry *debugfs_dentry_glstats;
 761         struct dentry *debugfs_dentry_sbstats;
 762 };
 763
 764 static inline void gfs2_glstats_inc(struct gfs2_glock *gl, int which)
 765 {
 766         gl->gl_stats.stats[which]++;
 767 }
 768
 769 static inline void gfs2_sbstats_inc(const struct gfs2_glock *gl, int which)
 770 {
 771         const struct gfs2_sbd *sdp = gl->gl_sbd;
 772         preempt_disable();
 773         this_cpu_ptr(sdp->sd_lkstats)->lkstats[gl->gl_name.ln_type].stats[which]++;
 774         preempt_enable();
 775 }
 776
 777 #endif /* __INCORE_DOT_H__ */
 778