1/* SPDX-License-Identifier: GPL-2.0-only */ 2/* 3 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. 4 * Copyright (C) 2004-2008 Red Hat, Inc. All rights reserved. 5 */ 6 7#ifndef __INCORE_DOT_H__ 8#define __INCORE_DOT_H__ 9 10#include <linux/fs.h> 11#include <linux/kobject.h> 12#include <linux/workqueue.h> 13#include <linux/dlm.h> 14#include <linux/buffer_head.h> 15#include <linux/rcupdate.h> 16#include <linux/rculist_bl.h> 17#include <linux/completion.h> 18#include <linux/rbtree.h> 19#include <linux/ktime.h> 20#include <linux/percpu.h> 21#include <linux/lockref.h> 22#include <linux/rhashtable.h> 23 24#define DIO_WAIT 0x00000010 25#define DIO_METADATA 0x00000020 26 27struct gfs2_log_operations; 28struct gfs2_bufdata; 29struct gfs2_holder; 30struct gfs2_glock; 31struct gfs2_quota_data; 32struct gfs2_trans; 33struct gfs2_jdesc; 34struct gfs2_sbd; 35struct lm_lockops; 36 37typedef void (*gfs2_glop_bh_t) (struct gfs2_glock *gl, unsigned int ret); 38 39struct gfs2_log_header_host { 40 u64 lh_sequence; /* Sequence number of this transaction */ 41 u32 lh_flags; /* GFS2_LOG_HEAD_... */ 42 u32 lh_tail; /* Block number of log tail */ 43 u32 lh_blkno; 44 45 s64 lh_local_total; 46 s64 lh_local_free; 47 s64 lh_local_dinodes; 48}; 49 50/* 51 * Structure of operations that are associated with each 52 * type of element in the log. 53 */ 54 55struct 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/** 70 * Clone bitmaps (bi_clone): 71 * 72 * - When a block is freed, we remember the previous state of the block in the 73 * clone bitmap, and only mark the block as free in the real bitmap. 74 * 75 * - When looking for a block to allocate, we check for a free block in the 76 * clone bitmap, and if no clone bitmap exists, in the real bitmap. 77 * 78 * - For allocating a block, we mark it as allocated in the real bitmap, and if 79 * a clone bitmap exists, also in the clone bitmap. 80 * 81 * - At the end of a log_flush, we copy the real bitmap into the clone bitmap 82 * to make the clone bitmap reflect the current allocation state. 83 * (Alternatively, we could remove the clone bitmap.) 84 * 85 * The clone bitmaps are in-core only, and is never written to disk. 86 * 87 * These steps ensure that blocks which have been freed in a transaction cannot 88 * be reallocated in that same transaction. 89 */ 90struct gfs2_bitmap { 91 struct buffer_head *bi_bh; 92 char *bi_clone; 93 unsigned long bi_flags; 94 u32 bi_offset; 95 u32 bi_start; 96 u32 bi_bytes; 97 u32 bi_blocks; 98}; 99 100struct gfs2_rgrpd { 101 struct rb_node rd_node; /* Link with superblock */ 102 struct gfs2_glock *rd_gl; /* Glock for this rgrp */ 103 u64 rd_addr; /* grp block disk address */ 104 u64 rd_data0; /* first data location */ 105 u32 rd_length; /* length of rgrp header in fs blocks */ 106 u32 rd_data; /* num of data blocks in rgrp */ 107 u32 rd_bitbytes; /* number of bytes in data bitmaps */ 108 u32 rd_free; 109 u32 rd_reserved; /* number of blocks reserved */ 110 u32 rd_free_clone; 111 u32 rd_dinodes; 112 u64 rd_igeneration; 113 struct gfs2_bitmap *rd_bits; 114 struct gfs2_sbd *rd_sbd; 115 struct gfs2_rgrp_lvb *rd_rgl; 116 u32 rd_last_alloc; 117 u32 rd_flags; 118 u32 rd_extfail_pt; /* extent failure point */ 119#define GFS2_RDF_CHECK 0x10000000 /* check for unlinked inodes */ 120#define GFS2_RDF_UPTODATE 0x20000000 /* rg is up to date */ 121#define GFS2_RDF_ERROR 0x40000000 /* error in rg */ 122#define GFS2_RDF_PREFERRED 0x80000000 /* This rgrp is preferred */ 123#define GFS2_RDF_MASK 0xf0000000 /* mask for internal flags */ 124 spinlock_t rd_rsspin; /* protects reservation related vars */ 125 struct rb_root rd_rstree; /* multi-block reservation tree */ 126}; 127 128struct gfs2_rbm { 129 struct gfs2_rgrpd *rgd; 130 u32 offset; /* The offset is bitmap relative */ 131 int bii; /* Bitmap index */ 132}; 133 134static inline struct gfs2_bitmap *rbm_bi(const struct gfs2_rbm *rbm) 135{ 136 return rbm->rgd->rd_bits + rbm->bii; 137} 138 139static inline u64 gfs2_rbm_to_block(const struct gfs2_rbm *rbm) 140{ 141 BUG_ON(rbm->offset >= rbm->rgd->rd_data); 142 return rbm->rgd->rd_data0 + (rbm_bi(rbm)->bi_start * GFS2_NBBY) + 143 rbm->offset; 144} 145 146static inline bool gfs2_rbm_eq(const struct gfs2_rbm *rbm1, 147 const struct gfs2_rbm *rbm2) 148{ 149 return (rbm1->rgd == rbm2->rgd) && (rbm1->bii == rbm2->bii) && 150 (rbm1->offset == rbm2->offset); 151} 152 153enum gfs2_state_bits { 154 BH_Pinned = BH_PrivateStart, 155 BH_Escaped = BH_PrivateStart + 1, 156}; 157 158BUFFER_FNS(Pinned, pinned) 159TAS_BUFFER_FNS(Pinned, pinned) 160BUFFER_FNS(Escaped, escaped) 161TAS_BUFFER_FNS(Escaped, escaped) 162 163struct gfs2_bufdata { 164 struct buffer_head *bd_bh; 165 struct gfs2_glock *bd_gl; 166 u64 bd_blkno; 167 168 struct list_head bd_list; 169 170 struct gfs2_trans *bd_tr; 171 struct list_head bd_ail_st_list; 172 struct list_head bd_ail_gl_list; 173}; 174 175/* 176 * Internally, we prefix things with gdlm_ and GDLM_ (for gfs-dlm) since a 177 * prefix of lock_dlm_ gets awkward. 178 */ 179 180#define GDLM_STRNAME_BYTES 25 181#define GDLM_LVB_SIZE 32 182 183/* 184 * ls_recover_flags: 185 * 186 * DFL_BLOCK_LOCKS: dlm is in recovery and will grant locks that had been 187 * held by failed nodes whose journals need recovery. Those locks should 188 * only be used for journal recovery until the journal recovery is done. 189 * This is set by the dlm recover_prep callback and cleared by the 190 * gfs2_control thread when journal recovery is complete. To avoid 191 * races between recover_prep setting and gfs2_control clearing, recover_spin 192 * is held while changing this bit and reading/writing recover_block 193 * and recover_start. 194 * 195 * DFL_NO_DLM_OPS: dlm lockspace ops/callbacks are not being used. 196 * 197 * DFL_FIRST_MOUNT: this node is the first to mount this fs and is doing 198 * recovery of all journals before allowing other nodes to mount the fs. 199 * This is cleared when FIRST_MOUNT_DONE is set. 200 * 201 * DFL_FIRST_MOUNT_DONE: this node was the first mounter, and has finished 202 * recovery of all journals, and now allows other nodes to mount the fs. 203 * 204 * DFL_MOUNT_DONE: gdlm_mount has completed successfully and cleared 205 * BLOCK_LOCKS for the first time. The gfs2_control thread should now 206 * control clearing BLOCK_LOCKS for further recoveries. 207 * 208 * DFL_UNMOUNT: gdlm_unmount sets to keep sdp off gfs2_control_wq. 209 * 210 * DFL_DLM_RECOVERY: set while dlm is in recovery, between recover_prep() 211 * and recover_done(), i.e. set while recover_block == recover_start. 212 */ 213 214enum { 215 DFL_BLOCK_LOCKS = 0, 216 DFL_NO_DLM_OPS = 1, 217 DFL_FIRST_MOUNT = 2, 218 DFL_FIRST_MOUNT_DONE = 3, 219 DFL_MOUNT_DONE = 4, 220 DFL_UNMOUNT = 5, 221 DFL_DLM_RECOVERY = 6, 222}; 223 224/* 225 * We are using struct lm_lockname as an rhashtable key. Avoid holes within 226 * the struct; padding at the end is fine. 227 */ 228struct lm_lockname { 229 u64 ln_number; 230 struct gfs2_sbd *ln_sbd; 231 unsigned int ln_type; 232}; 233 234#define lm_name_equal(name1, name2) \ 235 (((name1)->ln_number == (name2)->ln_number) && \ 236 ((name1)->ln_type == (name2)->ln_type) && \ 237 ((name1)->ln_sbd == (name2)->ln_sbd)) 238 239 240struct gfs2_glock_operations { 241 int (*go_sync) (struct gfs2_glock *gl); 242 int (*go_xmote_bh) (struct gfs2_glock *gl, struct gfs2_holder *gh); 243 void (*go_inval) (struct gfs2_glock *gl, int flags); 244 int (*go_demote_ok) (const struct gfs2_glock *gl); 245 int (*go_lock) (struct gfs2_holder *gh); 246 void (*go_dump)(struct seq_file *seq, struct gfs2_glock *gl, 247 const char *fs_id_buf); 248 void (*go_callback)(struct gfs2_glock *gl, bool remote); 249 void (*go_free)(struct gfs2_glock *gl); 250 const int go_subclass; 251 const int go_type; 252 const unsigned long go_flags; 253#define GLOF_ASPACE 1 /* address space attached */ 254#define GLOF_LVB 2 /* Lock Value Block attached */ 255#define GLOF_LRU 4 /* LRU managed */ 256#define GLOF_NONDISK 8 /* not I/O related */ 257}; 258 259enum { 260 GFS2_LKS_SRTT = 0, /* Non blocking smoothed round trip time */ 261 GFS2_LKS_SRTTVAR = 1, /* Non blocking smoothed variance */ 262 GFS2_LKS_SRTTB = 2, /* Blocking smoothed round trip time */ 263 GFS2_LKS_SRTTVARB = 3, /* Blocking smoothed variance */ 264 GFS2_LKS_SIRT = 4, /* Smoothed Inter-request time */ 265 GFS2_LKS_SIRTVAR = 5, /* Smoothed Inter-request variance */ 266 GFS2_LKS_DCOUNT = 6, /* Count of dlm requests */ 267 GFS2_LKS_QCOUNT = 7, /* Count of gfs2_holder queues */ 268 GFS2_NR_LKSTATS 269}; 270 271struct gfs2_lkstats { 272 u64 stats[GFS2_NR_LKSTATS]; 273}; 274 275enum { 276 /* States */ 277 HIF_HOLDER = 6, /* Set for gh that "holds" the glock */ 278 HIF_FIRST = 7, 279 HIF_WAIT = 10, 280}; 281 282struct gfs2_holder { 283 struct list_head gh_list; 284 285 struct gfs2_glock *gh_gl; 286 struct pid *gh_owner_pid; 287 u16 gh_flags; 288 u16 gh_state; 289 290 int gh_error; 291 unsigned long gh_iflags; /* HIF_... */ 292 unsigned long gh_ip; 293}; 294 295/* Number of quota types we support */ 296#define GFS2_MAXQUOTAS 2 297 298struct gfs2_qadata { /* quota allocation data */ 299 /* Quota stuff */ 300 struct gfs2_quota_data *qa_qd[2 * GFS2_MAXQUOTAS]; 301 struct gfs2_holder qa_qd_ghs[2 * GFS2_MAXQUOTAS]; 302 unsigned int qa_qd_num; 303 int qa_ref; 304}; 305 306/* Resource group multi-block reservation, in order of appearance: 307 308 Step 1. Function prepares to write, allocates a mb, sets the size hint. 309 Step 2. User calls inplace_reserve to target an rgrp, sets the rgrp info 310 Step 3. Function get_local_rgrp locks the rgrp, determines which bits to use 311 Step 4. Bits are assigned from the rgrp based on either the reservation 312 or wherever it can. 313*/ 314 315struct gfs2_blkreserv { 316 struct rb_node rs_node; /* link to other block reservations */ 317 struct gfs2_rbm rs_rbm; /* Start of reservation */ 318 u32 rs_free; /* how many blocks are still free */ 319}; 320 321/* 322 * Allocation parameters 323 * @target: The number of blocks we'd ideally like to allocate 324 * @aflags: The flags (e.g. Orlov flag) 325 * 326 * The intent is to gradually expand this structure over time in 327 * order to give more information, e.g. alignment, min extent size 328 * to the allocation code. 329 */ 330struct gfs2_alloc_parms { 331 u64 target; 332 u32 min_target; 333 u32 aflags; 334 u64 allowed; 335}; 336 337enum { 338 GLF_LOCK = 1, 339 GLF_DEMOTE = 3, 340 GLF_PENDING_DEMOTE = 4, 341 GLF_DEMOTE_IN_PROGRESS = 5, 342 GLF_DIRTY = 6, 343 GLF_LFLUSH = 7, 344 GLF_INVALIDATE_IN_PROGRESS = 8, 345 GLF_REPLY_PENDING = 9, 346 GLF_INITIAL = 10, 347 GLF_FROZEN = 11, 348 GLF_LRU = 13, 349 GLF_OBJECT = 14, /* Used only for tracing */ 350 GLF_BLOCKING = 15, 351 GLF_INODE_CREATING = 16, /* Inode creation occurring */ 352 GLF_PENDING_DELETE = 17, 353 GLF_FREEING = 18, /* Wait for glock to be freed */ 354}; 355 356struct gfs2_glock { 357 unsigned long gl_flags; /* GLF_... */ 358 struct lm_lockname gl_name; 359 360 struct lockref gl_lockref; 361 362 /* State fields protected by gl_lockref.lock */ 363 unsigned int gl_state:2, /* Current state */ 364 gl_target:2, /* Target state */ 365 gl_demote_state:2, /* State requested by remote node */ 366 gl_req:2, /* State in last dlm request */ 367 gl_reply:8; /* Last reply from the dlm */ 368 369 unsigned long gl_demote_time; /* time of first demote request */ 370 long gl_hold_time; 371 struct list_head gl_holders; 372 373 const struct gfs2_glock_operations *gl_ops; 374 ktime_t gl_dstamp; 375 struct gfs2_lkstats gl_stats; 376 struct dlm_lksb gl_lksb; 377 unsigned long gl_tchange; 378 void *gl_object; 379 380 struct list_head gl_lru; 381 struct list_head gl_ail_list; 382 atomic_t gl_ail_count; 383 atomic_t gl_revokes; 384 struct delayed_work gl_work; 385 /* For iopen glocks only */ 386 struct { 387 struct delayed_work gl_delete; 388 u64 gl_no_formal_ino; 389 }; 390 struct rcu_head gl_rcu; 391 struct rhash_head gl_node; 392}; 393 394enum { 395 GIF_INVALID = 0, 396 GIF_QD_LOCKED = 1, 397 GIF_ALLOC_FAILED = 2, 398 GIF_SW_PAGED = 3, 399 GIF_FREE_VFS_INODE = 5, 400 GIF_GLOP_PENDING = 6, 401 GIF_DEFERRED_DELETE = 7, 402}; 403 404struct gfs2_inode { 405 struct inode i_inode; 406 u64 i_no_addr; 407 u64 i_no_formal_ino; 408 u64 i_generation; 409 u64 i_eattr; 410 unsigned long i_flags; /* GIF_... */ 411 struct gfs2_glock *i_gl; /* Move into i_gh? */ 412 struct gfs2_holder i_iopen_gh; 413 struct gfs2_holder i_gh; /* for prepare/commit_write only */ 414 struct gfs2_qadata *i_qadata; /* quota allocation data */ 415 struct gfs2_holder i_rgd_gh; 416 struct gfs2_blkreserv i_res; /* rgrp multi-block reservation */ 417 u64 i_goal; /* goal block for allocations */ 418 atomic_t i_sizehint; /* hint of the write size */ 419 struct rw_semaphore i_rw_mutex; 420 struct list_head i_ordered; 421 struct list_head i_trunc_list; 422 __be64 *i_hash_cache; 423 u32 i_entries; 424 u32 i_diskflags; 425 u8 i_height; 426 u8 i_depth; 427 u16 i_rahead; 428}; 429 430/* 431 * Since i_inode is the first element of struct gfs2_inode, 432 * this is effectively a cast. 433 */ 434static inline struct gfs2_inode *GFS2_I(struct inode *inode) 435{ 436 return container_of(inode, struct gfs2_inode, i_inode); 437} 438 439static inline struct gfs2_sbd *GFS2_SB(const struct inode *inode) 440{ 441 return inode->i_sb->s_fs_info; 442} 443 444struct gfs2_file { 445 struct mutex f_fl_mutex; 446 struct gfs2_holder f_fl_gh; 447}; 448 449struct gfs2_revoke_replay { 450 struct list_head rr_list; 451 u64 rr_blkno; 452 unsigned int rr_where; 453}; 454 455enum { 456 QDF_CHANGE = 1, 457 QDF_LOCKED = 2, 458 QDF_REFRESH = 3, 459 QDF_QMSG_QUIET = 4, 460}; 461 462struct gfs2_quota_data { 463 struct hlist_bl_node qd_hlist; 464 struct list_head qd_list; 465 struct kqid qd_id; 466 struct gfs2_sbd *qd_sbd; 467 struct lockref qd_lockref; 468 struct list_head qd_lru; 469 unsigned qd_hash; 470 471 unsigned long qd_flags; /* QDF_... */ 472 473 s64 qd_change; 474 s64 qd_change_sync; 475 476 unsigned int qd_slot; 477 unsigned int qd_slot_count; 478 479 struct buffer_head *qd_bh; 480 struct gfs2_quota_change *qd_bh_qc; 481 unsigned int qd_bh_count; 482 483 struct gfs2_glock *qd_gl; 484 struct gfs2_quota_lvb qd_qb; 485 486 u64 qd_sync_gen; 487 unsigned long qd_last_warn; 488 struct rcu_head qd_rcu; 489}; 490 491enum { 492 TR_TOUCHED = 1, 493 TR_ATTACHED = 2, 494 TR_ALLOCED = 3, 495}; 496 497struct gfs2_trans { 498 unsigned long tr_ip; 499 500 unsigned int tr_blocks; 501 unsigned int tr_revokes; 502 unsigned int tr_reserved; 503 unsigned long tr_flags; 504 505 unsigned int tr_num_buf_new; 506 unsigned int tr_num_databuf_new; 507 unsigned int tr_num_buf_rm; 508 unsigned int tr_num_databuf_rm; 509 unsigned int tr_num_revoke; 510 unsigned int tr_num_revoke_rm; 511 512 struct list_head tr_list; 513 struct list_head tr_databuf; 514 struct list_head tr_buf; 515 516 unsigned int tr_first; 517 struct list_head tr_ail1_list; 518 struct list_head tr_ail2_list; 519}; 520 521struct gfs2_journal_extent { 522 struct list_head list; 523 524 unsigned int lblock; /* First logical block */ 525 u64 dblock; /* First disk block */ 526 u64 blocks; 527}; 528 529struct gfs2_jdesc { 530 struct list_head jd_list; 531 struct list_head extent_list; 532 unsigned int nr_extents; 533 struct work_struct jd_work; 534 struct inode *jd_inode; 535 unsigned long jd_flags; 536#define JDF_RECOVERY 1 537 unsigned int jd_jid; 538 u32 jd_blocks; 539 int jd_recover_error; 540 /* Replay stuff */ 541 542 unsigned int jd_found_blocks; 543 unsigned int jd_found_revokes; 544 unsigned int jd_replayed_blocks; 545 546 struct list_head jd_revoke_list; 547 unsigned int jd_replay_tail; 548 549 u64 jd_no_addr; 550}; 551 552struct gfs2_statfs_change_host { 553 s64 sc_total; 554 s64 sc_free; 555 s64 sc_dinodes; 556}; 557 558#define GFS2_QUOTA_DEFAULT GFS2_QUOTA_OFF 559#define GFS2_QUOTA_OFF 0 560#define GFS2_QUOTA_ACCOUNT 1 561#define GFS2_QUOTA_ON 2 562 563#define GFS2_DATA_DEFAULT GFS2_DATA_ORDERED 564#define GFS2_DATA_WRITEBACK 1 565#define GFS2_DATA_ORDERED 2 566 567#define GFS2_ERRORS_DEFAULT GFS2_ERRORS_WITHDRAW 568#define GFS2_ERRORS_WITHDRAW 0 569#define GFS2_ERRORS_CONTINUE 1 /* place holder for future feature */ 570#define GFS2_ERRORS_RO 2 /* place holder for future feature */ 571#define GFS2_ERRORS_PANIC 3 572 573struct gfs2_args { 574 char ar_lockproto[GFS2_LOCKNAME_LEN]; /* Name of the Lock Protocol */ 575 char ar_locktable[GFS2_LOCKNAME_LEN]; /* Name of the Lock Table */ 576 char ar_hostdata[GFS2_LOCKNAME_LEN]; /* Host specific data */ 577 unsigned int ar_spectator:1; /* Don't get a journal */ 578 unsigned int ar_localflocks:1; /* Let the VFS do flock|fcntl */ 579 unsigned int ar_debug:1; /* Oops on errors */ 580 unsigned int ar_posix_acl:1; /* Enable posix acls */ 581 unsigned int ar_quota:2; /* off/account/on */ 582 unsigned int ar_suiddir:1; /* suiddir support */ 583 unsigned int ar_data:2; /* ordered/writeback */ 584 unsigned int ar_meta:1; /* mount metafs */ 585 unsigned int ar_discard:1; /* discard requests */ 586 unsigned int ar_errors:2; /* errors=withdraw | panic */ 587 unsigned int ar_nobarrier:1; /* do not send barriers */ 588 unsigned int ar_rgrplvb:1; /* use lvbs for rgrp info */ 589 unsigned int ar_loccookie:1; /* use location based readdir 590 cookies */ 591 s32 ar_commit; /* Commit interval */ 592 s32 ar_statfs_quantum; /* The fast statfs interval */ 593 s32 ar_quota_quantum; /* The quota interval */ 594 s32 ar_statfs_percent; /* The % change to force sync */ 595}; 596 597struct gfs2_tune { 598 spinlock_t gt_spin; 599 600 unsigned int gt_logd_secs; 601 602 unsigned int gt_quota_warn_period; /* Secs between quota warn msgs */ 603 unsigned int gt_quota_scale_num; /* Numerator */ 604 unsigned int gt_quota_scale_den; /* Denominator */ 605 unsigned int gt_quota_quantum; /* Secs between syncs to quota file */ 606 unsigned int gt_new_files_jdata; 607 unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */ 608 unsigned int gt_complain_secs; 609 unsigned int gt_statfs_quantum; 610 unsigned int gt_statfs_slow; 611}; 612 613enum { 614 SDF_JOURNAL_CHECKED = 0, 615 SDF_JOURNAL_LIVE = 1, 616 SDF_WITHDRAWN = 2, 617 SDF_NOBARRIERS = 3, 618 SDF_NORECOVERY = 4, 619 SDF_DEMOTE = 5, 620 SDF_NOJOURNALID = 6, 621 SDF_RORECOVERY = 7, /* read only recovery */ 622 SDF_SKIP_DLM_UNLOCK = 8, 623 SDF_FORCE_AIL_FLUSH = 9, 624 SDF_FS_FROZEN = 10, 625 SDF_WITHDRAWING = 11, /* Will withdraw eventually */ 626 SDF_WITHDRAW_IN_PROG = 12, /* Withdraw is in progress */ 627 SDF_REMOTE_WITHDRAW = 13, /* Performing remote recovery */ 628 SDF_WITHDRAW_RECOVERY = 14, /* Wait for journal recovery when we are 629 withdrawing */ 630}; 631 632enum gfs2_freeze_state { 633 SFS_UNFROZEN = 0, 634 SFS_STARTING_FREEZE = 1, 635 SFS_FROZEN = 2, 636}; 637 638#define GFS2_FSNAME_LEN 256 639 640struct gfs2_inum_host { 641 u64 no_formal_ino; 642 u64 no_addr; 643}; 644 645struct gfs2_sb_host { 646 u32 sb_magic; 647 u32 sb_type; 648 u32 sb_format; 649 650 u32 sb_fs_format; 651 u32 sb_multihost_format; 652 u32 sb_bsize; 653 u32 sb_bsize_shift; 654 655 struct gfs2_inum_host sb_master_dir; 656 struct gfs2_inum_host sb_root_dir; 657 658 char sb_lockproto[GFS2_LOCKNAME_LEN]; 659 char sb_locktable[GFS2_LOCKNAME_LEN]; 660}; 661 662/* 663 * lm_mount() return values 664 * 665 * ls_jid - the journal ID this node should use 666 * ls_first - this node is the first to mount the file system 667 * ls_lockspace - lock module's context for this file system 668 * ls_ops - lock module's functions 669 */ 670 671struct lm_lockstruct { 672 int ls_jid; 673 unsigned int ls_first; 674 const struct lm_lockops *ls_ops; 675 dlm_lockspace_t *ls_dlm; 676 677 int ls_recover_jid_done; /* These two are deprecated, */ 678 int ls_recover_jid_status; /* used previously by gfs_controld */ 679 680 struct dlm_lksb ls_mounted_lksb; /* mounted_lock */ 681 struct dlm_lksb ls_control_lksb; /* control_lock */ 682 char ls_control_lvb[GDLM_LVB_SIZE]; /* control_lock lvb */ 683 struct completion ls_sync_wait; /* {control,mounted}_{lock,unlock} */ 684 char *ls_lvb_bits; 685 686 spinlock_t ls_recover_spin; /* protects following fields */ 687 unsigned long ls_recover_flags; /* DFL_ */ 688 uint32_t ls_recover_mount; /* gen in first recover_done cb */ 689 uint32_t ls_recover_start; /* gen in last recover_done cb */ 690 uint32_t ls_recover_block; /* copy recover_start in last recover_prep */ 691 uint32_t ls_recover_size; /* size of recover_submit, recover_result */ 692 uint32_t *ls_recover_submit; /* gen in last recover_slot cb per jid */ 693 uint32_t *ls_recover_result; /* result of last jid recovery */ 694}; 695 696struct gfs2_pcpu_lkstats { 697 /* One struct for each glock type */ 698 struct gfs2_lkstats lkstats[10]; 699}; 700 701/* List of local (per node) statfs inodes */ 702struct local_statfs_inode { 703 struct list_head si_list; 704 struct inode *si_sc_inode; 705 unsigned int si_jid; /* journal id this statfs inode corresponds to */ 706}; 707 708struct gfs2_sbd { 709 struct super_block *sd_vfs; 710 struct gfs2_pcpu_lkstats __percpu *sd_lkstats; 711 struct kobject sd_kobj; 712 struct completion sd_kobj_unregister; 713 unsigned long sd_flags; /* SDF_... */ 714 struct gfs2_sb_host sd_sb; 715 716 /* Constants computed on mount */ 717 718 u32 sd_fsb2bb; 719 u32 sd_fsb2bb_shift; 720 u32 sd_diptrs; /* Number of pointers in a dinode */ 721 u32 sd_inptrs; /* Number of pointers in a indirect block */ 722 u32 sd_ldptrs; /* Number of pointers in a log descriptor block */ 723 u32 sd_jbsize; /* Size of a journaled data block */ 724 u32 sd_hash_bsize; /* sizeof(exhash block) */ 725 u32 sd_hash_bsize_shift; 726 u32 sd_hash_ptrs; /* Number of pointers in a hash block */ 727 u32 sd_qc_per_block; 728 u32 sd_blocks_per_bitmap; 729 u32 sd_max_dirres; /* Max blocks needed to add a directory entry */ 730 u32 sd_max_height; /* Max height of a file's metadata tree */ 731 u64 sd_heightsize[GFS2_MAX_META_HEIGHT + 1]; 732 u32 sd_max_dents_per_leaf; /* Max number of dirents in a leaf block */ 733 734 struct gfs2_args sd_args; /* Mount arguments */ 735 struct gfs2_tune sd_tune; /* Filesystem tuning structure */ 736 737 /* Lock Stuff */ 738 739 struct lm_lockstruct sd_lockstruct; 740 struct gfs2_holder sd_live_gh; 741 struct gfs2_glock *sd_rename_gl; 742 struct gfs2_glock *sd_freeze_gl; 743 struct work_struct sd_freeze_work; 744 wait_queue_head_t sd_glock_wait; 745 wait_queue_head_t sd_async_glock_wait; 746 atomic_t sd_glock_disposal; 747 struct completion sd_locking_init; 748 struct completion sd_wdack; 749 struct delayed_work sd_control_work; 750 751 /* Inode Stuff */ 752 753 struct dentry *sd_master_dir; 754 struct dentry *sd_root_dir; 755 756 struct inode *sd_jindex; 757 struct inode *sd_statfs_inode; 758 struct inode *sd_sc_inode; 759 struct list_head sd_sc_inodes_list; 760 struct inode *sd_qc_inode; 761 struct inode *sd_rindex; 762 struct inode *sd_quota_inode; 763 764 /* StatFS stuff */ 765 766 spinlock_t sd_statfs_spin; 767 struct gfs2_statfs_change_host sd_statfs_master; 768 struct gfs2_statfs_change_host sd_statfs_local; 769 int sd_statfs_force_sync; 770 771 /* Resource group stuff */ 772 773 int sd_rindex_uptodate; 774 spinlock_t sd_rindex_spin; 775 struct rb_root sd_rindex_tree; 776 unsigned int sd_rgrps; 777 unsigned int sd_max_rg_data; 778 779 /* Journal index stuff */ 780 781 struct list_head sd_jindex_list; 782 spinlock_t sd_jindex_spin; 783 struct mutex sd_jindex_mutex; 784 unsigned int sd_journals; 785 786 struct gfs2_jdesc *sd_jdesc; 787 struct gfs2_holder sd_journal_gh; 788 struct gfs2_holder sd_jinode_gh; 789 struct gfs2_glock *sd_jinode_gl; 790 791 struct gfs2_holder sd_sc_gh; 792 struct gfs2_holder sd_qc_gh; 793 794 struct completion sd_journal_ready; 795 796 /* Daemon stuff */ 797 798 struct task_struct *sd_logd_process; 799 struct task_struct *sd_quotad_process; 800 801 /* Quota stuff */ 802 803 struct list_head sd_quota_list; 804 atomic_t sd_quota_count; 805 struct mutex sd_quota_mutex; 806 struct mutex sd_quota_sync_mutex; 807 wait_queue_head_t sd_quota_wait; 808 struct list_head sd_trunc_list; 809 spinlock_t sd_trunc_lock; 810 811 unsigned int sd_quota_slots; 812 unsigned long *sd_quota_bitmap; 813 spinlock_t sd_bitmap_lock; 814 815 u64 sd_quota_sync_gen; 816 817 /* Log stuff */ 818 819 struct address_space sd_aspace; 820 821 spinlock_t sd_log_lock; 822 823 struct gfs2_trans *sd_log_tr; 824 unsigned int sd_log_blks_reserved; 825 int sd_log_committed_revoke; 826 827 atomic_t sd_log_pinned; 828 unsigned int sd_log_num_revoke; 829 830 struct list_head sd_log_revokes; 831 struct list_head sd_log_ordered; 832 spinlock_t sd_ordered_lock; 833 834 atomic_t sd_log_thresh1; 835 atomic_t sd_log_thresh2; 836 atomic_t sd_log_blks_free; 837 atomic_t sd_log_blks_needed; 838 wait_queue_head_t sd_log_waitq; 839 wait_queue_head_t sd_logd_waitq; 840 841 u64 sd_log_sequence; 842 unsigned int sd_log_head; 843 unsigned int sd_log_tail; 844 int sd_log_idle; 845 846 struct rw_semaphore sd_log_flush_lock; 847 atomic_t sd_log_in_flight; 848 struct bio *sd_log_bio; 849 wait_queue_head_t sd_log_flush_wait; 850 int sd_log_error; /* First log error */ 851 wait_queue_head_t sd_withdraw_wait; 852 853 atomic_t sd_reserving_log; 854 wait_queue_head_t sd_reserving_log_wait; 855 856 unsigned int sd_log_flush_head; 857 858 spinlock_t sd_ail_lock; 859 struct list_head sd_ail1_list; 860 struct list_head sd_ail2_list; 861 862 /* For quiescing the filesystem */ 863 struct gfs2_holder sd_freeze_gh; 864 atomic_t sd_freeze_state; 865 struct mutex sd_freeze_mutex; 866 867 char sd_fsname[GFS2_FSNAME_LEN + 3 * sizeof(int) + 2]; 868 char sd_table_name[GFS2_FSNAME_LEN]; 869 char sd_proto_name[GFS2_FSNAME_LEN]; 870 871 /* Debugging crud */ 872 873 unsigned long sd_last_warning; 874 struct dentry *debugfs_dir; /* debugfs directory */ 875 unsigned long sd_glock_dqs_held; 876}; 877 878static inline void gfs2_glstats_inc(struct gfs2_glock *gl, int which) 879{ 880 gl->gl_stats.stats[which]++; 881} 882 883static inline void gfs2_sbstats_inc(const struct gfs2_glock *gl, int which) 884{ 885 const struct gfs2_sbd *sdp = gl->gl_name.ln_sbd; 886 preempt_disable(); 887 this_cpu_ptr(sdp->sd_lkstats)->lkstats[gl->gl_name.ln_type].stats[which]++; 888 preempt_enable(); 889} 890 891extern struct gfs2_rgrpd *gfs2_glock2rgrp(struct gfs2_glock *gl); 892 893static inline unsigned gfs2_max_stuffed_size(const struct gfs2_inode *ip) 894{ 895 return GFS2_SB(&ip->i_inode)->sd_sb.sb_bsize - sizeof(struct gfs2_dinode); 896} 897 898#endif /* __INCORE_DOT_H__ */ 899 900