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