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 27 struct gfs2_log_operations; 28 struct gfs2_bufdata; 29 struct gfs2_holder; 30 struct gfs2_glock; 31 struct gfs2_quota_data; 32 struct gfs2_trans; 33 struct gfs2_jdesc; 34 struct gfs2_sbd; 35 struct lm_lockops; 36 37 typedef void (*gfs2_glop_bh_t) (struct gfs2_glock *gl, unsigned int ret); 38 39 struct 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 46 /* 47 * Structure of operations that are associated with each 48 * type of element in the log. 49 */ 50 51 struct gfs2_log_operations { 52 void (*lo_before_commit) (struct gfs2_sbd *sdp, struct gfs2_trans *tr); 53 void (*lo_after_commit) (struct gfs2_sbd *sdp, struct gfs2_trans *tr); 54 void (*lo_before_scan) (struct gfs2_jdesc *jd, 55 struct gfs2_log_header_host *head, int pass); 56 int (*lo_scan_elements) (struct gfs2_jdesc *jd, unsigned int start, 57 struct gfs2_log_descriptor *ld, __be64 *ptr, 58 int pass); 59 void (*lo_after_scan) (struct gfs2_jdesc *jd, int error, int pass); 60 const char *lo_name; 61 }; 62 63 #define GBF_FULL 1 64 65 /** 66 * Clone bitmaps (bi_clone): 67 * 68 * - When a block is freed, we remember the previous state of the block in the 69 * clone bitmap, and only mark the block as free in the real bitmap. 70 * 71 * - When looking for a block to allocate, we check for a free block in the 72 * clone bitmap, and if no clone bitmap exists, in the real bitmap. 73 * 74 * - For allocating a block, we mark it as allocated in the real bitmap, and if 75 * a clone bitmap exists, also in the clone bitmap. 76 * 77 * - At the end of a log_flush, we copy the real bitmap into the clone bitmap 78 * to make the clone bitmap reflect the current allocation state. 79 * (Alternatively, we could remove the clone bitmap.) 80 * 81 * The clone bitmaps are in-core only, and is never written to disk. 82 * 83 * These steps ensure that blocks which have been freed in a transaction cannot 84 * be reallocated in that same transaction. 85 */ 86 struct gfs2_bitmap { 87 struct buffer_head *bi_bh; 88 char *bi_clone; 89 unsigned long bi_flags; 90 u32 bi_offset; 91 u32 bi_start; 92 u32 bi_bytes; 93 u32 bi_blocks; 94 }; 95 96 struct gfs2_rgrpd { 97 struct rb_node rd_node; /* Link with superblock */ 98 struct gfs2_glock *rd_gl; /* Glock for this rgrp */ 99 u64 rd_addr; /* grp block disk address */ 100 u64 rd_data0; /* first data location */ 101 u32 rd_length; /* length of rgrp header in fs blocks */ 102 u32 rd_data; /* num of data blocks in rgrp */ 103 u32 rd_bitbytes; /* number of bytes in data bitmaps */ 104 u32 rd_free; 105 u32 rd_reserved; /* number of blocks reserved */ 106 u32 rd_free_clone; 107 u32 rd_dinodes; 108 u64 rd_igeneration; 109 struct gfs2_bitmap *rd_bits; 110 struct gfs2_sbd *rd_sbd; 111 struct gfs2_rgrp_lvb *rd_rgl; 112 u32 rd_last_alloc; 113 u32 rd_flags; 114 u32 rd_extfail_pt; /* extent failure point */ 115 #define GFS2_RDF_CHECK 0x10000000 /* check for unlinked inodes */ 116 #define GFS2_RDF_UPTODATE 0x20000000 /* rg is up to date */ 117 #define GFS2_RDF_ERROR 0x40000000 /* error in rg */ 118 #define GFS2_RDF_PREFERRED 0x80000000 /* This rgrp is preferred */ 119 #define GFS2_RDF_MASK 0xf0000000 /* mask for internal flags */ 120 spinlock_t rd_rsspin; /* protects reservation related vars */ 121 struct rb_root rd_rstree; /* multi-block reservation tree */ 122 }; 123 124 struct gfs2_rbm { 125 struct gfs2_rgrpd *rgd; 126 u32 offset; /* The offset is bitmap relative */ 127 int bii; /* Bitmap index */ 128 }; 129 130 static inline struct gfs2_bitmap *rbm_bi(const struct gfs2_rbm *rbm) 131 { 132 return rbm->rgd->rd_bits + rbm->bii; 133 } 134 135 static inline u64 gfs2_rbm_to_block(const struct gfs2_rbm *rbm) 136 { 137 BUG_ON(rbm->offset >= rbm->rgd->rd_data); 138 return rbm->rgd->rd_data0 + (rbm_bi(rbm)->bi_start * GFS2_NBBY) + 139 rbm->offset; 140 } 141 142 static inline bool gfs2_rbm_eq(const struct gfs2_rbm *rbm1, 143 const struct gfs2_rbm *rbm2) 144 { 145 return (rbm1->rgd == rbm2->rgd) && (rbm1->bii == rbm2->bii) && 146 (rbm1->offset == rbm2->offset); 147 } 148 149 enum gfs2_state_bits { 150 BH_Pinned = BH_PrivateStart, 151 BH_Escaped = BH_PrivateStart + 1, 152 }; 153 154 BUFFER_FNS(Pinned, pinned) 155 TAS_BUFFER_FNS(Pinned, pinned) 156 BUFFER_FNS(Escaped, escaped) 157 TAS_BUFFER_FNS(Escaped, escaped) 158 159 struct gfs2_bufdata { 160 struct buffer_head *bd_bh; 161 struct gfs2_glock *bd_gl; 162 u64 bd_blkno; 163 164 struct list_head bd_list; 165 166 struct gfs2_trans *bd_tr; 167 struct list_head bd_ail_st_list; 168 struct list_head bd_ail_gl_list; 169 }; 170 171 /* 172 * Internally, we prefix things with gdlm_ and GDLM_ (for gfs-dlm) since a 173 * prefix of lock_dlm_ gets awkward. 174 */ 175 176 #define GDLM_STRNAME_BYTES 25 177 #define GDLM_LVB_SIZE 32 178 179 /* 180 * ls_recover_flags: 181 * 182 * DFL_BLOCK_LOCKS: dlm is in recovery and will grant locks that had been 183 * held by failed nodes whose journals need recovery. Those locks should 184 * only be used for journal recovery until the journal recovery is done. 185 * This is set by the dlm recover_prep callback and cleared by the 186 * gfs2_control thread when journal recovery is complete. To avoid 187 * races between recover_prep setting and gfs2_control clearing, recover_spin 188 * is held while changing this bit and reading/writing recover_block 189 * and recover_start. 190 * 191 * DFL_NO_DLM_OPS: dlm lockspace ops/callbacks are not being used. 192 * 193 * DFL_FIRST_MOUNT: this node is the first to mount this fs and is doing 194 * recovery of all journals before allowing other nodes to mount the fs. 195 * This is cleared when FIRST_MOUNT_DONE is set. 196 * 197 * DFL_FIRST_MOUNT_DONE: this node was the first mounter, and has finished 198 * recovery of all journals, and now allows other nodes to mount the fs. 199 * 200 * DFL_MOUNT_DONE: gdlm_mount has completed successfully and cleared 201 * BLOCK_LOCKS for the first time. The gfs2_control thread should now 202 * control clearing BLOCK_LOCKS for further recoveries. 203 * 204 * DFL_UNMOUNT: gdlm_unmount sets to keep sdp off gfs2_control_wq. 205 * 206 * DFL_DLM_RECOVERY: set while dlm is in recovery, between recover_prep() 207 * and recover_done(), i.e. set while recover_block == recover_start. 208 */ 209 210 enum { 211 DFL_BLOCK_LOCKS = 0, 212 DFL_NO_DLM_OPS = 1, 213 DFL_FIRST_MOUNT = 2, 214 DFL_FIRST_MOUNT_DONE = 3, 215 DFL_MOUNT_DONE = 4, 216 DFL_UNMOUNT = 5, 217 DFL_DLM_RECOVERY = 6, 218 }; 219 220 /* 221 * We are using struct lm_lockname as an rhashtable key. Avoid holes within 222 * the struct; padding at the end is fine. 223 */ 224 struct lm_lockname { 225 u64 ln_number; 226 struct gfs2_sbd *ln_sbd; 227 unsigned int ln_type; 228 }; 229 230 #define lm_name_equal(name1, name2) \ 231 (((name1)->ln_number == (name2)->ln_number) && \ 232 ((name1)->ln_type == (name2)->ln_type) && \ 233 ((name1)->ln_sbd == (name2)->ln_sbd)) 234 235 236 struct gfs2_glock_operations { 237 void (*go_sync) (struct gfs2_glock *gl); 238 int (*go_xmote_bh) (struct gfs2_glock *gl, struct gfs2_holder *gh); 239 void (*go_inval) (struct gfs2_glock *gl, int flags); 240 int (*go_demote_ok) (const struct gfs2_glock *gl); 241 int (*go_lock) (struct gfs2_holder *gh); 242 void (*go_unlock) (struct gfs2_holder *gh); 243 void (*go_dump)(struct seq_file *seq, struct gfs2_glock *gl, 244 const char *fs_id_buf); 245 void (*go_callback)(struct gfs2_glock *gl, bool remote); 246 const int go_type; 247 const unsigned long go_flags; 248 #define GLOF_ASPACE 1 249 #define GLOF_LVB 2 250 #define GLOF_LRU 4 251 }; 252 253 enum { 254 GFS2_LKS_SRTT = 0, /* Non blocking smoothed round trip time */ 255 GFS2_LKS_SRTTVAR = 1, /* Non blocking smoothed variance */ 256 GFS2_LKS_SRTTB = 2, /* Blocking smoothed round trip time */ 257 GFS2_LKS_SRTTVARB = 3, /* Blocking smoothed variance */ 258 GFS2_LKS_SIRT = 4, /* Smoothed Inter-request time */ 259 GFS2_LKS_SIRTVAR = 5, /* Smoothed Inter-request variance */ 260 GFS2_LKS_DCOUNT = 6, /* Count of dlm requests */ 261 GFS2_LKS_QCOUNT = 7, /* Count of gfs2_holder queues */ 262 GFS2_NR_LKSTATS 263 }; 264 265 struct gfs2_lkstats { 266 u64 stats[GFS2_NR_LKSTATS]; 267 }; 268 269 enum { 270 /* States */ 271 HIF_HOLDER = 6, /* Set for gh that "holds" the glock */ 272 HIF_FIRST = 7, 273 HIF_WAIT = 10, 274 }; 275 276 struct gfs2_holder { 277 struct list_head gh_list; 278 279 struct gfs2_glock *gh_gl; 280 struct pid *gh_owner_pid; 281 u16 gh_flags; 282 u16 gh_state; 283 284 int gh_error; 285 unsigned long gh_iflags; /* HIF_... */ 286 unsigned long gh_ip; 287 }; 288 289 /* Number of quota types we support */ 290 #define GFS2_MAXQUOTAS 2 291 292 struct gfs2_qadata { /* quota allocation data */ 293 /* Quota stuff */ 294 struct gfs2_quota_data *qa_qd[2 * GFS2_MAXQUOTAS]; 295 struct gfs2_holder qa_qd_ghs[2 * GFS2_MAXQUOTAS]; 296 unsigned int qa_qd_num; 297 }; 298 299 /* Resource group multi-block reservation, in order of appearance: 300 301 Step 1. Function prepares to write, allocates a mb, sets the size hint. 302 Step 2. User calls inplace_reserve to target an rgrp, sets the rgrp info 303 Step 3. Function get_local_rgrp locks the rgrp, determines which bits to use 304 Step 4. Bits are assigned from the rgrp based on either the reservation 305 or wherever it can. 306 */ 307 308 struct gfs2_blkreserv { 309 struct rb_node rs_node; /* link to other block reservations */ 310 struct gfs2_rbm rs_rbm; /* Start of reservation */ 311 u32 rs_free; /* how many blocks are still free */ 312 }; 313 314 /* 315 * Allocation parameters 316 * @target: The number of blocks we'd ideally like to allocate 317 * @aflags: The flags (e.g. Orlov flag) 318 * 319 * The intent is to gradually expand this structure over time in 320 * order to give more information, e.g. alignment, min extent size 321 * to the allocation code. 322 */ 323 struct gfs2_alloc_parms { 324 u64 target; 325 u32 min_target; 326 u32 aflags; 327 u64 allowed; 328 }; 329 330 enum { 331 GLF_LOCK = 1, 332 GLF_DEMOTE = 3, 333 GLF_PENDING_DEMOTE = 4, 334 GLF_DEMOTE_IN_PROGRESS = 5, 335 GLF_DIRTY = 6, 336 GLF_LFLUSH = 7, 337 GLF_INVALIDATE_IN_PROGRESS = 8, 338 GLF_REPLY_PENDING = 9, 339 GLF_INITIAL = 10, 340 GLF_FROZEN = 11, 341 GLF_QUEUED = 12, 342 GLF_LRU = 13, 343 GLF_OBJECT = 14, /* Used only for tracing */ 344 GLF_BLOCKING = 15, 345 GLF_INODE_CREATING = 16, /* Inode creation occurring */ 346 }; 347 348 struct gfs2_glock { 349 unsigned long gl_flags; /* GLF_... */ 350 struct lm_lockname gl_name; 351 352 struct lockref gl_lockref; 353 354 /* State fields protected by gl_lockref.lock */ 355 unsigned int gl_state:2, /* Current state */ 356 gl_target:2, /* Target state */ 357 gl_demote_state:2, /* State requested by remote node */ 358 gl_req:2, /* State in last dlm request */ 359 gl_reply:8; /* Last reply from the dlm */ 360 361 unsigned long gl_demote_time; /* time of first demote request */ 362 long gl_hold_time; 363 struct list_head gl_holders; 364 365 const struct gfs2_glock_operations *gl_ops; 366 ktime_t gl_dstamp; 367 struct gfs2_lkstats gl_stats; 368 struct dlm_lksb gl_lksb; 369 unsigned long gl_tchange; 370 void *gl_object; 371 372 struct list_head gl_lru; 373 struct list_head gl_ail_list; 374 atomic_t gl_ail_count; 375 atomic_t gl_revokes; 376 struct delayed_work gl_work; 377 union { 378 /* For inode and iopen glocks only */ 379 struct work_struct gl_delete; 380 /* For rgrp glocks only */ 381 struct { 382 loff_t start; 383 loff_t end; 384 } gl_vm; 385 }; 386 struct rcu_head gl_rcu; 387 struct rhash_head gl_node; 388 }; 389 390 #define GFS2_MIN_LVB_SIZE 32 /* Min size of LVB that gfs2 supports */ 391 392 enum { 393 GIF_INVALID = 0, 394 GIF_QD_LOCKED = 1, 395 GIF_ALLOC_FAILED = 2, 396 GIF_SW_PAGED = 3, 397 GIF_ORDERED = 4, 398 GIF_FREE_VFS_INODE = 5, 399 GIF_GLOP_PENDING = 6, 400 }; 401 402 struct gfs2_inode { 403 struct inode i_inode; 404 u64 i_no_addr; 405 u64 i_no_formal_ino; 406 u64 i_generation; 407 u64 i_eattr; 408 unsigned long i_flags; /* GIF_... */ 409 struct gfs2_glock *i_gl; /* Move into i_gh? */ 410 struct gfs2_holder i_iopen_gh; 411 struct gfs2_holder i_gh; /* for prepare/commit_write only */ 412 struct gfs2_qadata *i_qadata; /* quota allocation data */ 413 struct gfs2_holder i_rgd_gh; 414 struct gfs2_blkreserv i_res; /* rgrp multi-block reservation */ 415 u64 i_goal; /* goal block for allocations */ 416 atomic_t i_sizehint; /* hint of the write size */ 417 struct rw_semaphore i_rw_mutex; 418 struct list_head i_ordered; 419 struct list_head i_trunc_list; 420 __be64 *i_hash_cache; 421 u32 i_entries; 422 u32 i_diskflags; 423 u8 i_height; 424 u8 i_depth; 425 u16 i_rahead; 426 }; 427 428 /* 429 * Since i_inode is the first element of struct gfs2_inode, 430 * this is effectively a cast. 431 */ 432 static inline struct gfs2_inode *GFS2_I(struct inode *inode) 433 { 434 return container_of(inode, struct gfs2_inode, i_inode); 435 } 436 437 static inline struct gfs2_sbd *GFS2_SB(const struct inode *inode) 438 { 439 return inode->i_sb->s_fs_info; 440 } 441 442 struct gfs2_file { 443 struct mutex f_fl_mutex; 444 struct gfs2_holder f_fl_gh; 445 }; 446 447 struct gfs2_revoke_replay { 448 struct list_head rr_list; 449 u64 rr_blkno; 450 unsigned int rr_where; 451 }; 452 453 enum { 454 QDF_CHANGE = 1, 455 QDF_LOCKED = 2, 456 QDF_REFRESH = 3, 457 QDF_QMSG_QUIET = 4, 458 }; 459 460 struct gfs2_quota_data { 461 struct hlist_bl_node qd_hlist; 462 struct list_head qd_list; 463 struct kqid qd_id; 464 struct gfs2_sbd *qd_sbd; 465 struct lockref qd_lockref; 466 struct list_head qd_lru; 467 unsigned qd_hash; 468 469 unsigned long qd_flags; /* QDF_... */ 470 471 s64 qd_change; 472 s64 qd_change_sync; 473 474 unsigned int qd_slot; 475 unsigned int qd_slot_count; 476 477 struct buffer_head *qd_bh; 478 struct gfs2_quota_change *qd_bh_qc; 479 unsigned int qd_bh_count; 480 481 struct gfs2_glock *qd_gl; 482 struct gfs2_quota_lvb qd_qb; 483 484 u64 qd_sync_gen; 485 unsigned long qd_last_warn; 486 struct rcu_head qd_rcu; 487 }; 488 489 enum { 490 TR_TOUCHED = 1, 491 TR_ATTACHED = 2, 492 TR_ALLOCED = 3, 493 }; 494 495 struct gfs2_trans { 496 unsigned long tr_ip; 497 498 unsigned int tr_blocks; 499 unsigned int tr_revokes; 500 unsigned int tr_reserved; 501 unsigned long tr_flags; 502 503 unsigned int tr_num_buf_new; 504 unsigned int tr_num_databuf_new; 505 unsigned int tr_num_buf_rm; 506 unsigned int tr_num_databuf_rm; 507 unsigned int tr_num_revoke; 508 509 struct list_head tr_list; 510 struct list_head tr_databuf; 511 struct list_head tr_buf; 512 513 unsigned int tr_first; 514 struct list_head tr_ail1_list; 515 struct list_head tr_ail2_list; 516 }; 517 518 struct gfs2_journal_extent { 519 struct list_head list; 520 521 unsigned int lblock; /* First logical block */ 522 u64 dblock; /* First disk block */ 523 u64 blocks; 524 }; 525 526 struct gfs2_jdesc { 527 struct list_head jd_list; 528 struct list_head extent_list; 529 unsigned int nr_extents; 530 struct work_struct jd_work; 531 struct inode *jd_inode; 532 unsigned long jd_flags; 533 #define JDF_RECOVERY 1 534 unsigned int jd_jid; 535 u32 jd_blocks; 536 int jd_recover_error; 537 /* Replay stuff */ 538 539 unsigned int jd_found_blocks; 540 unsigned int jd_found_revokes; 541 unsigned int jd_replayed_blocks; 542 543 struct list_head jd_revoke_list; 544 unsigned int jd_replay_tail; 545 546 }; 547 548 struct gfs2_statfs_change_host { 549 s64 sc_total; 550 s64 sc_free; 551 s64 sc_dinodes; 552 }; 553 554 #define GFS2_QUOTA_DEFAULT GFS2_QUOTA_OFF 555 #define GFS2_QUOTA_OFF 0 556 #define GFS2_QUOTA_ACCOUNT 1 557 #define GFS2_QUOTA_ON 2 558 559 #define GFS2_DATA_DEFAULT GFS2_DATA_ORDERED 560 #define GFS2_DATA_WRITEBACK 1 561 #define GFS2_DATA_ORDERED 2 562 563 #define GFS2_ERRORS_DEFAULT GFS2_ERRORS_WITHDRAW 564 #define GFS2_ERRORS_WITHDRAW 0 565 #define GFS2_ERRORS_CONTINUE 1 /* place holder for future feature */ 566 #define GFS2_ERRORS_RO 2 /* place holder for future feature */ 567 #define GFS2_ERRORS_PANIC 3 568 569 struct gfs2_args { 570 char ar_lockproto[GFS2_LOCKNAME_LEN]; /* Name of the Lock Protocol */ 571 char ar_locktable[GFS2_LOCKNAME_LEN]; /* Name of the Lock Table */ 572 char ar_hostdata[GFS2_LOCKNAME_LEN]; /* Host specific data */ 573 unsigned int ar_spectator:1; /* Don't get a journal */ 574 unsigned int ar_localflocks:1; /* Let the VFS do flock|fcntl */ 575 unsigned int ar_debug:1; /* Oops on errors */ 576 unsigned int ar_posix_acl:1; /* Enable posix acls */ 577 unsigned int ar_quota:2; /* off/account/on */ 578 unsigned int ar_suiddir:1; /* suiddir support */ 579 unsigned int ar_data:2; /* ordered/writeback */ 580 unsigned int ar_meta:1; /* mount metafs */ 581 unsigned int ar_discard:1; /* discard requests */ 582 unsigned int ar_errors:2; /* errors=withdraw | panic */ 583 unsigned int ar_nobarrier:1; /* do not send barriers */ 584 unsigned int ar_rgrplvb:1; /* use lvbs for rgrp info */ 585 unsigned int ar_loccookie:1; /* use location based readdir 586 cookies */ 587 int ar_commit; /* Commit interval */ 588 int ar_statfs_quantum; /* The fast statfs interval */ 589 int ar_quota_quantum; /* The quota interval */ 590 int ar_statfs_percent; /* The % change to force sync */ 591 }; 592 593 struct gfs2_tune { 594 spinlock_t gt_spin; 595 596 unsigned int gt_logd_secs; 597 598 unsigned int gt_quota_warn_period; /* Secs between quota warn msgs */ 599 unsigned int gt_quota_scale_num; /* Numerator */ 600 unsigned int gt_quota_scale_den; /* Denominator */ 601 unsigned int gt_quota_quantum; /* Secs between syncs to quota file */ 602 unsigned int gt_new_files_jdata; 603 unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */ 604 unsigned int gt_complain_secs; 605 unsigned int gt_statfs_quantum; 606 unsigned int gt_statfs_slow; 607 }; 608 609 enum { 610 SDF_JOURNAL_CHECKED = 0, 611 SDF_JOURNAL_LIVE = 1, 612 SDF_WITHDRAWN = 2, 613 SDF_NOBARRIERS = 3, 614 SDF_NORECOVERY = 4, 615 SDF_DEMOTE = 5, 616 SDF_NOJOURNALID = 6, 617 SDF_RORECOVERY = 7, /* read only recovery */ 618 SDF_SKIP_DLM_UNLOCK = 8, 619 SDF_FORCE_AIL_FLUSH = 9, 620 SDF_AIL1_IO_ERROR = 10, 621 SDF_FS_FROZEN = 11, 622 }; 623 624 enum gfs2_freeze_state { 625 SFS_UNFROZEN = 0, 626 SFS_STARTING_FREEZE = 1, 627 SFS_FROZEN = 2, 628 }; 629 630 #define GFS2_FSNAME_LEN 256 631 632 struct gfs2_inum_host { 633 u64 no_formal_ino; 634 u64 no_addr; 635 }; 636 637 struct gfs2_sb_host { 638 u32 sb_magic; 639 u32 sb_type; 640 u32 sb_format; 641 642 u32 sb_fs_format; 643 u32 sb_multihost_format; 644 u32 sb_bsize; 645 u32 sb_bsize_shift; 646 647 struct gfs2_inum_host sb_master_dir; 648 struct gfs2_inum_host sb_root_dir; 649 650 char sb_lockproto[GFS2_LOCKNAME_LEN]; 651 char sb_locktable[GFS2_LOCKNAME_LEN]; 652 }; 653 654 /* 655 * lm_mount() return values 656 * 657 * ls_jid - the journal ID this node should use 658 * ls_first - this node is the first to mount the file system 659 * ls_lockspace - lock module's context for this file system 660 * ls_ops - lock module's functions 661 */ 662 663 struct lm_lockstruct { 664 int ls_jid; 665 unsigned int ls_first; 666 const struct lm_lockops *ls_ops; 667 dlm_lockspace_t *ls_dlm; 668 669 int ls_recover_jid_done; /* These two are deprecated, */ 670 int ls_recover_jid_status; /* used previously by gfs_controld */ 671 672 struct dlm_lksb ls_mounted_lksb; /* mounted_lock */ 673 struct dlm_lksb ls_control_lksb; /* control_lock */ 674 char ls_control_lvb[GDLM_LVB_SIZE]; /* control_lock lvb */ 675 struct completion ls_sync_wait; /* {control,mounted}_{lock,unlock} */ 676 char *ls_lvb_bits; 677 678 spinlock_t ls_recover_spin; /* protects following fields */ 679 unsigned long ls_recover_flags; /* DFL_ */ 680 uint32_t ls_recover_mount; /* gen in first recover_done cb */ 681 uint32_t ls_recover_start; /* gen in last recover_done cb */ 682 uint32_t ls_recover_block; /* copy recover_start in last recover_prep */ 683 uint32_t ls_recover_size; /* size of recover_submit, recover_result */ 684 uint32_t *ls_recover_submit; /* gen in last recover_slot cb per jid */ 685 uint32_t *ls_recover_result; /* result of last jid recovery */ 686 }; 687 688 struct gfs2_pcpu_lkstats { 689 /* One struct for each glock type */ 690 struct gfs2_lkstats lkstats[10]; 691 }; 692 693 struct gfs2_sbd { 694 struct super_block *sd_vfs; 695 struct gfs2_pcpu_lkstats __percpu *sd_lkstats; 696 struct kobject sd_kobj; 697 unsigned long sd_flags; /* SDF_... */ 698 struct gfs2_sb_host sd_sb; 699 700 /* Constants computed on mount */ 701 702 u32 sd_fsb2bb; 703 u32 sd_fsb2bb_shift; 704 u32 sd_diptrs; /* Number of pointers in a dinode */ 705 u32 sd_inptrs; /* Number of pointers in a indirect block */ 706 u32 sd_jbsize; /* Size of a journaled data block */ 707 u32 sd_hash_bsize; /* sizeof(exhash block) */ 708 u32 sd_hash_bsize_shift; 709 u32 sd_hash_ptrs; /* Number of pointers in a hash block */ 710 u32 sd_qc_per_block; 711 u32 sd_blocks_per_bitmap; 712 u32 sd_max_dirres; /* Max blocks needed to add a directory entry */ 713 u32 sd_max_height; /* Max height of a file's metadata tree */ 714 u64 sd_heightsize[GFS2_MAX_META_HEIGHT + 1]; 715 u32 sd_max_dents_per_leaf; /* Max number of dirents in a leaf block */ 716 717 struct gfs2_args sd_args; /* Mount arguments */ 718 struct gfs2_tune sd_tune; /* Filesystem tuning structure */ 719 720 /* Lock Stuff */ 721 722 struct lm_lockstruct sd_lockstruct; 723 struct gfs2_holder sd_live_gh; 724 struct gfs2_glock *sd_rename_gl; 725 struct gfs2_glock *sd_freeze_gl; 726 struct work_struct sd_freeze_work; 727 wait_queue_head_t sd_glock_wait; 728 atomic_t sd_glock_disposal; 729 struct completion sd_locking_init; 730 struct completion sd_wdack; 731 struct delayed_work sd_control_work; 732 733 /* Inode Stuff */ 734 735 struct dentry *sd_master_dir; 736 struct dentry *sd_root_dir; 737 738 struct inode *sd_jindex; 739 struct inode *sd_statfs_inode; 740 struct inode *sd_sc_inode; 741 struct inode *sd_qc_inode; 742 struct inode *sd_rindex; 743 struct inode *sd_quota_inode; 744 745 /* StatFS stuff */ 746 747 spinlock_t sd_statfs_spin; 748 struct gfs2_statfs_change_host sd_statfs_master; 749 struct gfs2_statfs_change_host sd_statfs_local; 750 int sd_statfs_force_sync; 751 752 /* Resource group stuff */ 753 754 int sd_rindex_uptodate; 755 spinlock_t sd_rindex_spin; 756 struct rb_root sd_rindex_tree; 757 unsigned int sd_rgrps; 758 unsigned int sd_max_rg_data; 759 760 /* Journal index stuff */ 761 762 struct list_head sd_jindex_list; 763 spinlock_t sd_jindex_spin; 764 struct mutex sd_jindex_mutex; 765 unsigned int sd_journals; 766 767 struct gfs2_jdesc *sd_jdesc; 768 struct gfs2_holder sd_journal_gh; 769 struct gfs2_holder sd_jinode_gh; 770 771 struct gfs2_holder sd_sc_gh; 772 struct gfs2_holder sd_qc_gh; 773 774 struct completion sd_journal_ready; 775 776 /* Daemon stuff */ 777 778 struct task_struct *sd_logd_process; 779 struct task_struct *sd_quotad_process; 780 781 /* Quota stuff */ 782 783 struct list_head sd_quota_list; 784 atomic_t sd_quota_count; 785 struct mutex sd_quota_mutex; 786 struct mutex sd_quota_sync_mutex; 787 wait_queue_head_t sd_quota_wait; 788 struct list_head sd_trunc_list; 789 spinlock_t sd_trunc_lock; 790 791 unsigned int sd_quota_slots; 792 unsigned long *sd_quota_bitmap; 793 spinlock_t sd_bitmap_lock; 794 795 u64 sd_quota_sync_gen; 796 797 /* Log stuff */ 798 799 struct address_space sd_aspace; 800 801 spinlock_t sd_log_lock; 802 803 struct gfs2_trans *sd_log_tr; 804 unsigned int sd_log_blks_reserved; 805 int sd_log_commited_revoke; 806 807 atomic_t sd_log_pinned; 808 unsigned int sd_log_num_revoke; 809 810 struct list_head sd_log_revokes; 811 struct list_head sd_log_ordered; 812 spinlock_t sd_ordered_lock; 813 814 atomic_t sd_log_thresh1; 815 atomic_t sd_log_thresh2; 816 atomic_t sd_log_blks_free; 817 atomic_t sd_log_blks_needed; 818 wait_queue_head_t sd_log_waitq; 819 wait_queue_head_t sd_logd_waitq; 820 821 u64 sd_log_sequence; 822 unsigned int sd_log_head; 823 unsigned int sd_log_tail; 824 int sd_log_idle; 825 826 struct rw_semaphore sd_log_flush_lock; 827 atomic_t sd_log_in_flight; 828 struct bio *sd_log_bio; 829 wait_queue_head_t sd_log_flush_wait; 830 int sd_log_error; 831 832 atomic_t sd_reserving_log; 833 wait_queue_head_t sd_reserving_log_wait; 834 835 unsigned int sd_log_flush_head; 836 837 spinlock_t sd_ail_lock; 838 struct list_head sd_ail1_list; 839 struct list_head sd_ail2_list; 840 841 /* For quiescing the filesystem */ 842 struct gfs2_holder sd_freeze_gh; 843 atomic_t sd_freeze_state; 844 struct mutex sd_freeze_mutex; 845 846 char sd_fsname[GFS2_FSNAME_LEN + 3 * sizeof(int) + 2]; 847 char sd_table_name[GFS2_FSNAME_LEN]; 848 char sd_proto_name[GFS2_FSNAME_LEN]; 849 850 /* Debugging crud */ 851 852 unsigned long sd_last_warning; 853 struct dentry *debugfs_dir; /* debugfs directory */ 854 }; 855 856 static inline void gfs2_glstats_inc(struct gfs2_glock *gl, int which) 857 { 858 gl->gl_stats.stats[which]++; 859 } 860 861 static inline void gfs2_sbstats_inc(const struct gfs2_glock *gl, int which) 862 { 863 const struct gfs2_sbd *sdp = gl->gl_name.ln_sbd; 864 preempt_disable(); 865 this_cpu_ptr(sdp->sd_lkstats)->lkstats[gl->gl_name.ln_type].stats[which]++; 866 preempt_enable(); 867 } 868 869 extern struct gfs2_rgrpd *gfs2_glock2rgrp(struct gfs2_glock *gl); 870 871 static inline unsigned gfs2_max_stuffed_size(const struct gfs2_inode *ip) 872 { 873 return GFS2_SB(&ip->i_inode)->sd_sb.sb_bsize - sizeof(struct gfs2_dinode); 874 } 875 876 #endif /* __INCORE_DOT_H__ */ 877 878