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 inplace_reserve (step 2): */
 254         u32 rs_requested; /* Filled in by caller of gfs2_inplace_reserve() */
 255
 256         /* components used during get_local_rgrp (step 3): */
 257         struct gfs2_rgrpd *rs_rgd;    /* pointer to the gfs2_rgrpd */
 258         struct gfs2_holder rs_rgd_gh; /* Filled in by get_local_rgrp */
 259         struct rb_node rs_node;       /* link to other block reservations */
 260
 261         /* components used during block searches and assignments (step 4): */
 262         struct gfs2_bitmap *rs_bi;    /* bitmap for the current allocation */
 263         u32 rs_biblk;                 /* start block relative to the bi */
 264         u32 rs_free;                  /* how many blocks are still free */
 265
 266         /* ancillary quota stuff */
 267         struct gfs2_quota_data *rs_qa_qd[2 * MAXQUOTAS];
 268         struct gfs2_holder rs_qa_qd_ghs[2 * MAXQUOTAS];
 269         unsigned int rs_qa_qd_num;
 270 };
 271
 272 enum {
 273         GLF_LOCK                        = 1,
 274         GLF_DEMOTE                      = 3,
 275         GLF_PENDING_DEMOTE              = 4,
 276         GLF_DEMOTE_IN_PROGRESS          = 5,
 277         GLF_DIRTY                       = 6,
 278         GLF_LFLUSH                      = 7,
 279         GLF_INVALIDATE_IN_PROGRESS      = 8,
 280         GLF_REPLY_PENDING               = 9,
 281         GLF_INITIAL                     = 10,
 282         GLF_FROZEN                      = 11,
 283         GLF_QUEUED                      = 12,
 284         GLF_LRU                         = 13,
 285         GLF_OBJECT                      = 14, /* Used only for tracing */
 286         GLF_BLOCKING                    = 15,
 287 };
 288
 289 struct gfs2_glock {
 290         struct hlist_bl_node gl_list;
 291         struct gfs2_sbd *gl_sbd;
 292         unsigned long gl_flags;         /* GLF_... */
 293         struct lm_lockname gl_name;
 294         atomic_t gl_ref;
 295
 296         spinlock_t gl_spin;
 297
 298         /* State fields protected by gl_spin */
 299         unsigned int gl_state:2,        /* Current state */
 300                      gl_target:2,       /* Target state */
 301                      gl_demote_state:2, /* State requested by remote node */
 302                      gl_req:2,          /* State in last dlm request */
 303                      gl_reply:8;        /* Last reply from the dlm */
 304
 305         unsigned int gl_hash;
 306         unsigned long gl_demote_time; /* time of first demote request */
 307         long gl_hold_time;
 308         struct list_head gl_holders;
 309
 310         const struct gfs2_glock_operations *gl_ops;
 311         ktime_t gl_dstamp;
 312         struct gfs2_lkstats gl_stats;
 313         struct dlm_lksb gl_lksb;
 314         char gl_lvb[32];
 315         unsigned long gl_tchange;
 316         void *gl_object;
 317
 318         struct list_head gl_lru;
 319         struct list_head gl_ail_list;
 320         atomic_t gl_ail_count;
 321         atomic_t gl_revokes;
 322         struct delayed_work gl_work;
 323         struct work_struct gl_delete;
 324         struct rcu_head gl_rcu;
 325 };
 326
 327 #define GFS2_MIN_LVB_SIZE 32    /* Min size of LVB that gfs2 supports */
 328
 329 enum {
 330         GIF_INVALID             = 0,
 331         GIF_QD_LOCKED           = 1,
 332         GIF_ALLOC_FAILED        = 2,
 333         GIF_SW_PAGED            = 3,
 334 };
 335
 336 struct gfs2_inode {
 337         struct inode i_inode;
 338         u64 i_no_addr;
 339         u64 i_no_formal_ino;
 340         u64 i_generation;
 341         u64 i_eattr;
 342         unsigned long i_flags;          /* GIF_... */
 343         struct gfs2_glock *i_gl; /* Move into i_gh? */
 344         struct gfs2_holder i_iopen_gh;
 345         struct gfs2_holder i_gh; /* for prepare/commit_write only */
 346         struct gfs2_blkreserv *i_res; /* rgrp multi-block reservation */
 347         struct gfs2_rgrpd *i_rgd;
 348         u64 i_goal;     /* goal block for allocations */
 349         struct rw_semaphore i_rw_mutex;
 350         struct list_head i_trunc_list;
 351         __be64 *i_hash_cache;
 352         u32 i_entries;
 353         u32 i_diskflags;
 354         u8 i_height;
 355         u8 i_depth;
 356 };
 357
 358 /*
 359  * Since i_inode is the first element of struct gfs2_inode,
 360  * this is effectively a cast.
 361  */
 362 static inline struct gfs2_inode *GFS2_I(struct inode *inode)
 363 {
 364         return container_of(inode, struct gfs2_inode, i_inode);
 365 }
 366
 367 static inline struct gfs2_sbd *GFS2_SB(const struct inode *inode)
 368 {
 369         return inode->i_sb->s_fs_info;
 370 }
 371
 372 struct gfs2_file {
 373         struct mutex f_fl_mutex;
 374         struct gfs2_holder f_fl_gh;
 375 };
 376
 377 struct gfs2_revoke_replay {
 378         struct list_head rr_list;
 379         u64 rr_blkno;
 380         unsigned int rr_where;
 381 };
 382
 383 enum {
 384         QDF_USER                = 0,
 385         QDF_CHANGE              = 1,
 386         QDF_LOCKED              = 2,
 387         QDF_REFRESH             = 3,
 388 };
 389
 390 struct gfs2_quota_data {
 391         struct list_head qd_list;
 392         struct list_head qd_reclaim;
 393
 394         atomic_t qd_count;
 395
 396         u32 qd_id;
 397         unsigned long qd_flags;         /* QDF_... */
 398
 399         s64 qd_change;
 400         s64 qd_change_sync;
 401
 402         unsigned int qd_slot;
 403         unsigned int qd_slot_count;
 404
 405         struct buffer_head *qd_bh;
 406         struct gfs2_quota_change *qd_bh_qc;
 407         unsigned int qd_bh_count;
 408
 409         struct gfs2_glock *qd_gl;
 410         struct gfs2_quota_lvb qd_qb;
 411
 412         u64 qd_sync_gen;
 413         unsigned long qd_last_warn;
 414 };
 415
 416 struct gfs2_trans {
 417         unsigned long tr_ip;
 418
 419         unsigned int tr_blocks;
 420         unsigned int tr_revokes;
 421         unsigned int tr_reserved;
 422
 423         struct gfs2_holder tr_t_gh;
 424
 425         int tr_touched;
 426
 427         unsigned int tr_num_buf_new;
 428         unsigned int tr_num_databuf_new;
 429         unsigned int tr_num_buf_rm;
 430         unsigned int tr_num_databuf_rm;
 431         unsigned int tr_num_revoke;
 432         unsigned int tr_num_revoke_rm;
 433 };
 434
 435 struct gfs2_ail {
 436         struct list_head ai_list;
 437
 438         unsigned int ai_first;
 439         struct list_head ai_ail1_list;
 440         struct list_head ai_ail2_list;
 441 };
 442
 443 struct gfs2_journal_extent {
 444         struct list_head extent_list;
 445
 446         unsigned int lblock; /* First logical block */
 447         u64 dblock; /* First disk block */
 448         u64 blocks;
 449 };
 450
 451 struct gfs2_jdesc {
 452         struct list_head jd_list;
 453         struct list_head extent_list;
 454         struct work_struct jd_work;
 455         struct inode *jd_inode;
 456         unsigned long jd_flags;
 457 #define JDF_RECOVERY 1
 458         unsigned int jd_jid;
 459         unsigned int jd_blocks;
 460         int jd_recover_error;
 461 };
 462
 463 struct gfs2_statfs_change_host {
 464         s64 sc_total;
 465         s64 sc_free;
 466         s64 sc_dinodes;
 467 };
 468
 469 #define GFS2_QUOTA_DEFAULT      GFS2_QUOTA_OFF
 470 #define GFS2_QUOTA_OFF          0
 471 #define GFS2_QUOTA_ACCOUNT      1
 472 #define GFS2_QUOTA_ON           2
 473
 474 #define GFS2_DATA_DEFAULT       GFS2_DATA_ORDERED
 475 #define GFS2_DATA_WRITEBACK     1
 476 #define GFS2_DATA_ORDERED       2
 477
 478 #define GFS2_ERRORS_DEFAULT     GFS2_ERRORS_WITHDRAW
 479 #define GFS2_ERRORS_WITHDRAW    0
 480 #define GFS2_ERRORS_CONTINUE    1 /* place holder for future feature */
 481 #define GFS2_ERRORS_RO          2 /* place holder for future feature */
 482 #define GFS2_ERRORS_PANIC       3
 483
 484 struct gfs2_args {
 485         char ar_lockproto[GFS2_LOCKNAME_LEN];   /* Name of the Lock Protocol */
 486         char ar_locktable[GFS2_LOCKNAME_LEN];   /* Name of the Lock Table */
 487         char ar_hostdata[GFS2_LOCKNAME_LEN];    /* Host specific data */
 488         unsigned int ar_spectator:1;            /* Don't get a journal */
 489         unsigned int ar_localflocks:1;          /* Let the VFS do flock|fcntl */
 490         unsigned int ar_debug:1;                /* Oops on errors */
 491         unsigned int ar_posix_acl:1;            /* Enable posix acls */
 492         unsigned int ar_quota:2;                /* off/account/on */
 493         unsigned int ar_suiddir:1;              /* suiddir support */
 494         unsigned int ar_data:2;                 /* ordered/writeback */
 495         unsigned int ar_meta:1;                 /* mount metafs */
 496         unsigned int ar_discard:1;              /* discard requests */
 497         unsigned int ar_errors:2;               /* errors=withdraw | panic */
 498         unsigned int ar_nobarrier:1;            /* do not send barriers */
 499         unsigned int ar_rgrplvb:1;              /* use lvbs for rgrp info */
 500         int ar_commit;                          /* Commit interval */
 501         int ar_statfs_quantum;                  /* The fast statfs interval */
 502         int ar_quota_quantum;                   /* The quota interval */
 503         int ar_statfs_percent;                  /* The % change to force sync */
 504 };
 505
 506 struct gfs2_tune {
 507         spinlock_t gt_spin;
 508
 509         unsigned int gt_logd_secs;
 510
 511         unsigned int gt_quota_simul_sync; /* Max quotavals to sync at once */
 512         unsigned int gt_quota_warn_period; /* Secs between quota warn msgs */
 513         unsigned int gt_quota_scale_num; /* Numerator */
 514         unsigned int gt_quota_scale_den; /* Denominator */
 515         unsigned int gt_quota_quantum; /* Secs between syncs to quota file */
 516         unsigned int gt_new_files_jdata;
 517         unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */
 518         unsigned int gt_complain_secs;
 519         unsigned int gt_statfs_quantum;
 520         unsigned int gt_statfs_slow;
 521 };
 522
 523 enum {
 524         SDF_JOURNAL_CHECKED     = 0,
 525         SDF_JOURNAL_LIVE        = 1,
 526         SDF_SHUTDOWN            = 2,
 527         SDF_NOBARRIERS          = 3,
 528         SDF_NORECOVERY          = 4,
 529         SDF_DEMOTE              = 5,
 530         SDF_NOJOURNALID         = 6,
 531         SDF_RORECOVERY          = 7, /* read only recovery */
 532 };
 533
 534 #define GFS2_FSNAME_LEN         256
 535
 536 struct gfs2_inum_host {
 537         u64 no_formal_ino;
 538         u64 no_addr;
 539 };
 540
 541 struct gfs2_sb_host {
 542         u32 sb_magic;
 543         u32 sb_type;
 544         u32 sb_format;
 545
 546         u32 sb_fs_format;
 547         u32 sb_multihost_format;
 548         u32 sb_bsize;
 549         u32 sb_bsize_shift;
 550
 551         struct gfs2_inum_host sb_master_dir;
 552         struct gfs2_inum_host sb_root_dir;
 553
 554         char sb_lockproto[GFS2_LOCKNAME_LEN];
 555         char sb_locktable[GFS2_LOCKNAME_LEN];
 556 };
 557
 558 /*
 559  * lm_mount() return values
 560  *
 561  * ls_jid - the journal ID this node should use
 562  * ls_first - this node is the first to mount the file system
 563  * ls_lockspace - lock module's context for this file system
 564  * ls_ops - lock module's functions
 565  */
 566
 567 struct lm_lockstruct {
 568         int ls_jid;
 569         unsigned int ls_first;
 570         const struct lm_lockops *ls_ops;
 571         dlm_lockspace_t *ls_dlm;
 572
 573         int ls_recover_jid_done;   /* These two are deprecated, */
 574         int ls_recover_jid_status; /* used previously by gfs_controld */
 575
 576         struct dlm_lksb ls_mounted_lksb; /* mounted_lock */
 577         struct dlm_lksb ls_control_lksb; /* control_lock */
 578         char ls_control_lvb[GDLM_LVB_SIZE]; /* control_lock lvb */
 579         struct completion ls_sync_wait; /* {control,mounted}_{lock,unlock} */
 580
 581         spinlock_t ls_recover_spin; /* protects following fields */
 582         unsigned long ls_recover_flags; /* DFL_ */
 583         uint32_t ls_recover_mount; /* gen in first recover_done cb */
 584         uint32_t ls_recover_start; /* gen in last recover_done cb */
 585         uint32_t ls_recover_block; /* copy recover_start in last recover_prep */
 586         uint32_t ls_recover_size; /* size of recover_submit, recover_result */
 587         uint32_t *ls_recover_submit; /* gen in last recover_slot cb per jid */
 588         uint32_t *ls_recover_result; /* result of last jid recovery */
 589 };
 590
 591 struct gfs2_pcpu_lkstats {
 592         /* One struct for each glock type */
 593         struct gfs2_lkstats lkstats[10];
 594 };
 595
 596 struct gfs2_sbd {
 597         struct super_block *sd_vfs;
 598         struct gfs2_pcpu_lkstats __percpu *sd_lkstats;
 599         struct kobject sd_kobj;
 600         unsigned long sd_flags; /* SDF_... */
 601         struct gfs2_sb_host sd_sb;
 602
 603         /* Constants computed on mount */
 604
 605         u32 sd_fsb2bb;
 606         u32 sd_fsb2bb_shift;
 607         u32 sd_diptrs;  /* Number of pointers in a dinode */
 608         u32 sd_inptrs;  /* Number of pointers in a indirect block */
 609         u32 sd_jbsize;  /* Size of a journaled data block */
 610         u32 sd_hash_bsize;      /* sizeof(exhash block) */
 611         u32 sd_hash_bsize_shift;
 612         u32 sd_hash_ptrs;       /* Number of pointers in a hash block */
 613         u32 sd_qc_per_block;
 614         u32 sd_max_dirres;      /* Max blocks needed to add a directory entry */
 615         u32 sd_max_height;      /* Max height of a file's metadata tree */
 616         u64 sd_heightsize[GFS2_MAX_META_HEIGHT + 1];
 617         u32 sd_max_jheight; /* Max height of journaled file's meta tree */
 618         u64 sd_jheightsize[GFS2_MAX_META_HEIGHT + 1];
 619
 620         struct gfs2_args sd_args;       /* Mount arguments */
 621         struct gfs2_tune sd_tune;       /* Filesystem tuning structure */
 622
 623         /* Lock Stuff */
 624
 625         struct lm_lockstruct sd_lockstruct;
 626         struct gfs2_holder sd_live_gh;
 627         struct gfs2_glock *sd_rename_gl;
 628         struct gfs2_glock *sd_trans_gl;
 629         wait_queue_head_t sd_glock_wait;
 630         atomic_t sd_glock_disposal;
 631         struct completion sd_locking_init;
 632         struct delayed_work sd_control_work;
 633
 634         /* Inode Stuff */
 635
 636         struct dentry *sd_master_dir;
 637         struct dentry *sd_root_dir;
 638
 639         struct inode *sd_jindex;
 640         struct inode *sd_statfs_inode;
 641         struct inode *sd_sc_inode;
 642         struct inode *sd_qc_inode;
 643         struct inode *sd_rindex;
 644         struct inode *sd_quota_inode;
 645
 646         /* StatFS stuff */
 647
 648         spinlock_t sd_statfs_spin;
 649         struct gfs2_statfs_change_host sd_statfs_master;
 650         struct gfs2_statfs_change_host sd_statfs_local;
 651         int sd_statfs_force_sync;
 652
 653         /* Resource group stuff */
 654
 655         int sd_rindex_uptodate;
 656         spinlock_t sd_rindex_spin;
 657         struct rb_root sd_rindex_tree;
 658         unsigned int sd_rgrps;
 659         unsigned int sd_max_rg_data;
 660
 661         /* Journal index stuff */
 662
 663         struct list_head sd_jindex_list;
 664         spinlock_t sd_jindex_spin;
 665         struct mutex sd_jindex_mutex;
 666         unsigned int sd_journals;
 667
 668         struct gfs2_jdesc *sd_jdesc;
 669         struct gfs2_holder sd_journal_gh;
 670         struct gfs2_holder sd_jinode_gh;
 671
 672         struct gfs2_holder sd_sc_gh;
 673         struct gfs2_holder sd_qc_gh;
 674
 675         /* Daemon stuff */
 676
 677         struct task_struct *sd_logd_process;
 678         struct task_struct *sd_quotad_process;
 679
 680         /* Quota stuff */
 681
 682         struct list_head sd_quota_list;
 683         atomic_t sd_quota_count;
 684         struct mutex sd_quota_mutex;
 685         wait_queue_head_t sd_quota_wait;
 686         struct list_head sd_trunc_list;
 687         spinlock_t sd_trunc_lock;
 688
 689         unsigned int sd_quota_slots;
 690         unsigned int sd_quota_chunks;
 691         unsigned char **sd_quota_bitmap;
 692
 693         u64 sd_quota_sync_gen;
 694
 695         /* Log stuff */
 696
 697         spinlock_t sd_log_lock;
 698
 699         unsigned int sd_log_blks_reserved;
 700         unsigned int sd_log_commited_buf;
 701         unsigned int sd_log_commited_databuf;
 702         int sd_log_commited_revoke;
 703
 704         atomic_t sd_log_pinned;
 705         unsigned int sd_log_num_buf;
 706         unsigned int sd_log_num_revoke;
 707         unsigned int sd_log_num_rg;
 708         unsigned int sd_log_num_databuf;
 709
 710         struct list_head sd_log_le_buf;
 711         struct list_head sd_log_le_revoke;
 712         struct list_head sd_log_le_databuf;
 713         struct list_head sd_log_le_ordered;
 714
 715         atomic_t sd_log_thresh1;
 716         atomic_t sd_log_thresh2;
 717         atomic_t sd_log_blks_free;
 718         wait_queue_head_t sd_log_waitq;
 719         wait_queue_head_t sd_logd_waitq;
 720
 721         u64 sd_log_sequence;
 722         unsigned int sd_log_head;
 723         unsigned int sd_log_tail;
 724         int sd_log_idle;
 725
 726         struct rw_semaphore sd_log_flush_lock;
 727         atomic_t sd_log_in_flight;
 728         struct bio *sd_log_bio;
 729         wait_queue_head_t sd_log_flush_wait;
 730         int sd_log_error;
 731
 732         unsigned int sd_log_flush_head;
 733         u64 sd_log_flush_wrapped;
 734
 735         spinlock_t sd_ail_lock;
 736         struct list_head sd_ail1_list;
 737         struct list_head sd_ail2_list;
 738
 739         /* Replay stuff */
 740
 741         struct list_head sd_revoke_list;
 742         unsigned int sd_replay_tail;
 743
 744         unsigned int sd_found_blocks;
 745         unsigned int sd_found_revokes;
 746         unsigned int sd_replayed_blocks;
 747
 748         /* For quiescing the filesystem */
 749
 750         struct gfs2_holder sd_freeze_gh;
 751         struct mutex sd_freeze_lock;
 752         unsigned int sd_freeze_count;
 753
 754         char sd_fsname[GFS2_FSNAME_LEN];
 755         char sd_table_name[GFS2_FSNAME_LEN];
 756         char sd_proto_name[GFS2_FSNAME_LEN];
 757
 758         /* Debugging crud */
 759
 760         unsigned long sd_last_warning;
 761         struct dentry *debugfs_dir;    /* debugfs directory */
 762         struct dentry *debugfs_dentry_glocks;
 763         struct dentry *debugfs_dentry_glstats;
 764         struct dentry *debugfs_dentry_sbstats;
 765 };
 766
 767 static inline void gfs2_glstats_inc(struct gfs2_glock *gl, int which)
 768 {
 769         gl->gl_stats.stats[which]++;
 770 }
 771
 772 static inline void gfs2_sbstats_inc(const struct gfs2_glock *gl, int which)
 773 {
 774         const struct gfs2_sbd *sdp = gl->gl_sbd;
 775         preempt_disable();
 776         this_cpu_ptr(sdp->sd_lkstats)->lkstats[gl->gl_name.ln_type].stats[which]++;
 777         preempt_enable();
 778 }
 779
 780 #endif /* __INCORE_DOT_H__ */
 781