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 #include <linux/mutex.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_jdesc; 35 struct gfs2_sbd; 36 struct lm_lockops; 37 38 typedef void (*gfs2_glop_bh_t) (struct gfs2_glock *gl, unsigned int ret); 39 40 struct gfs2_log_header_host { 41 u64 lh_sequence; /* Sequence number of this transaction */ 42 u32 lh_flags; /* GFS2_LOG_HEAD_... */ 43 u32 lh_tail; /* Block number of log tail */ 44 u32 lh_blkno; 45 46 s64 lh_local_total; 47 s64 lh_local_free; 48 s64 lh_local_dinodes; 49 }; 50 51 /* 52 * Structure of operations that are associated with each 53 * type of element in the log. 54 */ 55 56 struct gfs2_log_operations { 57 void (*lo_before_commit) (struct gfs2_sbd *sdp, struct gfs2_trans *tr); 58 void (*lo_after_commit) (struct gfs2_sbd *sdp, struct gfs2_trans *tr); 59 void (*lo_before_scan) (struct gfs2_jdesc *jd, 60 struct gfs2_log_header_host *head, int pass); 61 int (*lo_scan_elements) (struct gfs2_jdesc *jd, unsigned int start, 62 struct gfs2_log_descriptor *ld, __be64 *ptr, 63 int pass); 64 void (*lo_after_scan) (struct gfs2_jdesc *jd, int error, int pass); 65 const char *lo_name; 66 }; 67 68 #define GBF_FULL 1 69 70 /** 71 * Clone bitmaps (bi_clone): 72 * 73 * - When a block is freed, we remember the previous state of the block in the 74 * clone bitmap, and only mark the block as free in the real bitmap. 75 * 76 * - When looking for a block to allocate, we check for a free block in the 77 * clone bitmap, and if no clone bitmap exists, in the real bitmap. 78 * 79 * - For allocating a block, we mark it as allocated in the real bitmap, and if 80 * a clone bitmap exists, also in the clone bitmap. 81 * 82 * - At the end of a log_flush, we copy the real bitmap into the clone bitmap 83 * to make the clone bitmap reflect the current allocation state. 84 * (Alternatively, we could remove the clone bitmap.) 85 * 86 * The clone bitmaps are in-core only, and is never written to disk. 87 * 88 * These steps ensure that blocks which have been freed in a transaction cannot 89 * be reallocated in that same transaction. 90 */ 91 struct gfs2_bitmap { 92 struct buffer_head *bi_bh; 93 char *bi_clone; 94 unsigned long bi_flags; 95 u32 bi_offset; 96 u32 bi_start; 97 u32 bi_bytes; 98 u32 bi_blocks; 99 }; 100 101 struct gfs2_rgrpd { 102 struct rb_node rd_node; /* Link with superblock */ 103 struct gfs2_glock *rd_gl; /* Glock for this rgrp */ 104 u64 rd_addr; /* grp block disk address */ 105 u64 rd_data0; /* first data location */ 106 u32 rd_length; /* length of rgrp header in fs blocks */ 107 u32 rd_data; /* num of data blocks in rgrp */ 108 u32 rd_bitbytes; /* number of bytes in data bitmaps */ 109 u32 rd_free; 110 u32 rd_requested; /* number of blocks in rd_rstree */ 111 u32 rd_reserved; /* number of reserved blocks */ 112 u32 rd_free_clone; 113 u32 rd_dinodes; 114 u64 rd_igeneration; 115 struct gfs2_bitmap *rd_bits; 116 struct gfs2_sbd *rd_sbd; 117 struct gfs2_rgrp_lvb *rd_rgl; 118 u32 rd_last_alloc; 119 u32 rd_flags; 120 u32 rd_extfail_pt; /* extent failure point */ 121 #define GFS2_RDF_CHECK 0x10000000 /* check for unlinked inodes */ 122 #define GFS2_RDF_ERROR 0x40000000 /* error in rg */ 123 #define GFS2_RDF_PREFERRED 0x80000000 /* This rgrp is preferred */ 124 #define GFS2_RDF_MASK 0xf0000000 /* mask for internal flags */ 125 spinlock_t rd_rsspin; /* protects reservation related vars */ 126 struct mutex rd_mutex; 127 struct rb_root rd_rstree; /* multi-block reservation tree */ 128 }; 129 130 enum gfs2_state_bits { 131 BH_Pinned = BH_PrivateStart, 132 BH_Escaped = BH_PrivateStart + 1, 133 }; 134 135 BUFFER_FNS(Pinned, pinned) 136 TAS_BUFFER_FNS(Pinned, pinned) 137 BUFFER_FNS(Escaped, escaped) 138 TAS_BUFFER_FNS(Escaped, escaped) 139 140 struct gfs2_bufdata { 141 struct buffer_head *bd_bh; 142 struct gfs2_glock *bd_gl; 143 u64 bd_blkno; 144 145 struct list_head bd_list; 146 147 struct gfs2_trans *bd_tr; 148 struct list_head bd_ail_st_list; 149 struct list_head bd_ail_gl_list; 150 }; 151 152 /* 153 * Internally, we prefix things with gdlm_ and GDLM_ (for gfs-dlm) since a 154 * prefix of lock_dlm_ gets awkward. 155 */ 156 157 #define GDLM_STRNAME_BYTES 25 158 #define GDLM_LVB_SIZE 32 159 160 /* 161 * ls_recover_flags: 162 * 163 * DFL_BLOCK_LOCKS: dlm is in recovery and will grant locks that had been 164 * held by failed nodes whose journals need recovery. Those locks should 165 * only be used for journal recovery until the journal recovery is done. 166 * This is set by the dlm recover_prep callback and cleared by the 167 * gfs2_control thread when journal recovery is complete. To avoid 168 * races between recover_prep setting and gfs2_control clearing, recover_spin 169 * is held while changing this bit and reading/writing recover_block 170 * and recover_start. 171 * 172 * DFL_NO_DLM_OPS: dlm lockspace ops/callbacks are not being used. 173 * 174 * DFL_FIRST_MOUNT: this node is the first to mount this fs and is doing 175 * recovery of all journals before allowing other nodes to mount the fs. 176 * This is cleared when FIRST_MOUNT_DONE is set. 177 * 178 * DFL_FIRST_MOUNT_DONE: this node was the first mounter, and has finished 179 * recovery of all journals, and now allows other nodes to mount the fs. 180 * 181 * DFL_MOUNT_DONE: gdlm_mount has completed successfully and cleared 182 * BLOCK_LOCKS for the first time. The gfs2_control thread should now 183 * control clearing BLOCK_LOCKS for further recoveries. 184 * 185 * DFL_UNMOUNT: gdlm_unmount sets to keep sdp off gfs2_control_wq. 186 * 187 * DFL_DLM_RECOVERY: set while dlm is in recovery, between recover_prep() 188 * and recover_done(), i.e. set while recover_block == recover_start. 189 */ 190 191 enum { 192 DFL_BLOCK_LOCKS = 0, 193 DFL_NO_DLM_OPS = 1, 194 DFL_FIRST_MOUNT = 2, 195 DFL_FIRST_MOUNT_DONE = 3, 196 DFL_MOUNT_DONE = 4, 197 DFL_UNMOUNT = 5, 198 DFL_DLM_RECOVERY = 6, 199 }; 200 201 /* 202 * We are using struct lm_lockname as an rhashtable key. Avoid holes within 203 * the struct; padding at the end is fine. 204 */ 205 struct lm_lockname { 206 u64 ln_number; 207 struct gfs2_sbd *ln_sbd; 208 unsigned int ln_type; 209 }; 210 211 #define lm_name_equal(name1, name2) \ 212 (((name1)->ln_number == (name2)->ln_number) && \ 213 ((name1)->ln_type == (name2)->ln_type) && \ 214 ((name1)->ln_sbd == (name2)->ln_sbd)) 215 216 217 struct gfs2_glock_operations { 218 int (*go_sync) (struct gfs2_glock *gl); 219 int (*go_xmote_bh)(struct gfs2_glock *gl); 220 void (*go_inval) (struct gfs2_glock *gl, int flags); 221 int (*go_instantiate) (struct gfs2_glock *gl); 222 int (*go_held)(struct gfs2_holder *gh); 223 void (*go_dump)(struct seq_file *seq, const struct gfs2_glock *gl, 224 const char *fs_id_buf); 225 void (*go_callback)(struct gfs2_glock *gl, bool remote); 226 const int go_subclass; 227 const int go_type; 228 const unsigned long go_flags; 229 #define GLOF_ASPACE 1 /* address space attached */ 230 #define GLOF_LVB 2 /* Lock Value Block attached */ 231 }; 232 233 enum { 234 GFS2_LKS_SRTT = 0, /* Non blocking smoothed round trip time */ 235 GFS2_LKS_SRTTVAR = 1, /* Non blocking smoothed variance */ 236 GFS2_LKS_SRTTB = 2, /* Blocking smoothed round trip time */ 237 GFS2_LKS_SRTTVARB = 3, /* Blocking smoothed variance */ 238 GFS2_LKS_SIRT = 4, /* Smoothed Inter-request time */ 239 GFS2_LKS_SIRTVAR = 5, /* Smoothed Inter-request variance */ 240 GFS2_LKS_DCOUNT = 6, /* Count of dlm requests */ 241 GFS2_LKS_QCOUNT = 7, /* Count of gfs2_holder queues */ 242 GFS2_NR_LKSTATS 243 }; 244 245 struct gfs2_lkstats { 246 u64 stats[GFS2_NR_LKSTATS]; 247 }; 248 249 enum { 250 /* States */ 251 HIF_HOLDER = 6, /* Set for gh that "holds" the glock */ 252 HIF_WAIT = 10, 253 }; 254 255 struct gfs2_holder { 256 struct list_head gh_list; 257 258 struct gfs2_glock *gh_gl; 259 struct pid *gh_owner_pid; 260 u16 gh_flags; 261 u16 gh_state; 262 263 int gh_error; 264 unsigned long gh_iflags; /* HIF_... */ 265 unsigned long gh_ip; 266 }; 267 268 /* Number of quota types we support */ 269 #define GFS2_MAXQUOTAS 2 270 271 struct gfs2_qadata { /* quota allocation data */ 272 /* Quota stuff */ 273 struct gfs2_quota_data *qa_qd[2 * GFS2_MAXQUOTAS]; 274 struct gfs2_holder qa_qd_ghs[2 * GFS2_MAXQUOTAS]; 275 unsigned int qa_qd_num; 276 int qa_ref; 277 }; 278 279 /* Resource group multi-block reservation, in order of appearance: 280 281 Step 1. Function prepares to write, allocates a mb, sets the size hint. 282 Step 2. User calls inplace_reserve to target an rgrp, sets the rgrp info 283 Step 3. Function get_local_rgrp locks the rgrp, determines which bits to use 284 Step 4. Bits are assigned from the rgrp based on either the reservation 285 or wherever it can. 286 */ 287 288 struct gfs2_blkreserv { 289 struct rb_node rs_node; /* node within rd_rstree */ 290 struct gfs2_rgrpd *rs_rgd; 291 u64 rs_start; 292 u32 rs_requested; 293 u32 rs_reserved; /* number of reserved blocks */ 294 }; 295 296 /* 297 * Allocation parameters 298 * @target: The number of blocks we'd ideally like to allocate 299 * @aflags: The flags (e.g. Orlov flag) 300 * 301 * The intent is to gradually expand this structure over time in 302 * order to give more information, e.g. alignment, min extent size 303 * to the allocation code. 304 */ 305 struct gfs2_alloc_parms { 306 u64 target; 307 u32 min_target; 308 u32 aflags; 309 u64 allowed; 310 }; 311 312 enum { 313 GLF_LOCK = 1, 314 GLF_INSTANTIATE_NEEDED = 2, /* needs instantiate */ 315 GLF_DEMOTE = 3, 316 GLF_PENDING_DEMOTE = 4, 317 GLF_DEMOTE_IN_PROGRESS = 5, 318 GLF_DIRTY = 6, 319 GLF_LFLUSH = 7, 320 GLF_HAVE_REPLY = 9, 321 GLF_INITIAL = 10, 322 GLF_HAVE_FROZEN_REPLY = 11, 323 GLF_INSTANTIATE_IN_PROG = 12, /* instantiate happening now */ 324 GLF_LRU = 13, 325 GLF_OBJECT = 14, /* Used only for tracing */ 326 GLF_BLOCKING = 15, 327 GLF_TRY_TO_EVICT = 17, /* iopen glocks only */ 328 GLF_VERIFY_DELETE = 18, /* iopen glocks only */ 329 GLF_MAY_CANCEL = 19, 330 GLF_DEFER_DELETE = 20, /* iopen glocks only */ 331 GLF_CANCELING = 21, 332 }; 333 334 struct gfs2_glock { 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 /* For iopen glocks only */ 364 struct { 365 struct delayed_work gl_delete; 366 u64 gl_no_formal_ino; 367 }; 368 struct rcu_head gl_rcu; 369 struct rhash_head gl_node; 370 }; 371 372 static inline unsigned int glock_type(const struct gfs2_glock *gl) 373 { 374 return gl->gl_name.ln_type; 375 } 376 377 static inline u64 glock_number(const struct gfs2_glock *gl) 378 { 379 return gl->gl_name.ln_number; 380 } 381 382 enum { 383 GIF_QD_LOCKED = 1, 384 GIF_SW_PAGED = 3, 385 GIF_GLOP_PENDING = 6, 386 }; 387 388 struct gfs2_inode { 389 struct inode i_inode; 390 u64 i_no_addr; 391 u64 i_no_formal_ino; 392 u64 i_generation; 393 u64 i_eattr; 394 unsigned long i_flags; /* GIF_... */ 395 struct gfs2_glock *i_gl; 396 struct gfs2_holder i_iopen_gh; 397 struct gfs2_qadata *i_qadata; /* quota allocation data */ 398 struct gfs2_holder i_rgd_gh; 399 struct gfs2_blkreserv i_res; /* rgrp multi-block reservation */ 400 u64 i_goal; /* goal block for allocations */ 401 atomic_t i_sizehint; /* hint of the write size */ 402 struct rw_semaphore i_rw_mutex; 403 struct list_head i_ordered; 404 __be64 *i_hash_cache; 405 u32 i_entries; 406 u32 i_diskflags; 407 u8 i_height; 408 u8 i_depth; 409 u16 i_rahead; 410 }; 411 412 /* 413 * Since i_inode is the first element of struct gfs2_inode, 414 * this is effectively a cast. 415 */ 416 static inline struct gfs2_inode *GFS2_I(struct inode *inode) 417 { 418 return container_of(inode, struct gfs2_inode, i_inode); 419 } 420 421 static inline struct gfs2_sbd *GFS2_SB(const struct inode *inode) 422 { 423 return inode->i_sb->s_fs_info; 424 } 425 426 struct gfs2_file { 427 struct mutex f_fl_mutex; 428 struct gfs2_holder f_fl_gh; 429 }; 430 431 struct gfs2_revoke_replay { 432 struct list_head rr_list; 433 u64 rr_blkno; 434 unsigned int rr_where; 435 }; 436 437 enum { 438 QDF_CHANGE = 1, 439 QDF_LOCKED = 2, 440 QDF_REFRESH = 3, 441 QDF_QMSG_QUIET = 4, 442 }; 443 444 struct gfs2_quota_data { 445 struct hlist_bl_node qd_hlist; 446 struct list_head qd_list; 447 struct kqid qd_id; 448 struct gfs2_sbd *qd_sbd; 449 struct lockref qd_lockref; 450 struct list_head qd_lru; 451 unsigned qd_hash; 452 453 unsigned long qd_flags; /* QDF_... */ 454 455 s64 qd_change; 456 s64 qd_change_sync; 457 458 unsigned int qd_slot; 459 unsigned int qd_slot_ref; 460 461 struct buffer_head *qd_bh; 462 struct gfs2_quota_change *qd_bh_qc; 463 unsigned int qd_bh_count; 464 465 struct gfs2_glock *qd_gl; 466 struct gfs2_quota_lvb qd_qb; 467 468 u64 qd_sync_gen; 469 unsigned long qd_last_warn; 470 struct rcu_head qd_rcu; 471 }; 472 473 enum { 474 TR_TOUCHED = 1, 475 TR_ATTACHED = 2, 476 TR_ONSTACK = 3, 477 }; 478 479 struct gfs2_trans { 480 unsigned long tr_ip; 481 482 unsigned int tr_blocks; 483 unsigned int tr_revokes; 484 unsigned int tr_reserved; 485 unsigned long tr_flags; 486 487 unsigned int tr_num_buf_new; 488 unsigned int tr_num_databuf_new; 489 unsigned int tr_num_buf_rm; 490 unsigned int tr_num_databuf_rm; 491 unsigned int tr_num_revoke; 492 493 struct list_head tr_list; 494 struct list_head tr_databuf; 495 struct list_head tr_buf; 496 497 unsigned int tr_first; 498 struct list_head tr_ail1_list; 499 struct list_head tr_ail2_list; 500 }; 501 502 struct gfs2_journal_extent { 503 struct list_head list; 504 505 unsigned int lblock; /* First logical block */ 506 u64 dblock; /* First disk block */ 507 u64 blocks; 508 }; 509 510 struct gfs2_jdesc { 511 struct list_head jd_list; 512 struct list_head extent_list; 513 unsigned int nr_extents; 514 struct work_struct jd_work; 515 struct inode *jd_inode; 516 struct bio *jd_log_bio; 517 unsigned long jd_flags; 518 #define JDF_RECOVERY 1 519 unsigned int jd_jid; 520 u32 jd_blocks; 521 int jd_recover_error; 522 /* Replay stuff */ 523 524 unsigned int jd_found_blocks; 525 unsigned int jd_found_revokes; 526 unsigned int jd_replayed_blocks; 527 528 struct list_head jd_revoke_list; 529 unsigned int jd_replay_tail; 530 }; 531 532 struct gfs2_statfs_change_host { 533 s64 sc_total; 534 s64 sc_free; 535 s64 sc_dinodes; 536 }; 537 538 #define GFS2_QUOTA_DEFAULT GFS2_QUOTA_OFF 539 #define GFS2_QUOTA_OFF 0 540 #define GFS2_QUOTA_ACCOUNT 1 541 #define GFS2_QUOTA_ON 2 542 #define GFS2_QUOTA_QUIET 3 /* on but not complaining */ 543 544 #define GFS2_DATA_DEFAULT GFS2_DATA_ORDERED 545 #define GFS2_DATA_WRITEBACK 1 546 #define GFS2_DATA_ORDERED 2 547 548 #define GFS2_ERRORS_DEFAULT GFS2_ERRORS_WITHDRAW 549 #define GFS2_ERRORS_WITHDRAW 0 550 #define GFS2_ERRORS_DEACTIVATE 1 551 #define GFS2_ERRORS_PANIC 3 552 553 struct gfs2_args { 554 char ar_lockproto[GFS2_LOCKNAME_LEN]; /* Name of the Lock Protocol */ 555 char ar_locktable[GFS2_LOCKNAME_LEN]; /* Name of the Lock Table */ 556 char ar_hostdata[GFS2_LOCKNAME_LEN]; /* Host specific data */ 557 unsigned int ar_spectator:1; /* Don't get a journal */ 558 unsigned int ar_localflocks:1; /* Let the VFS do flock|fcntl */ 559 unsigned int ar_debug:1; /* Oops on errors */ 560 unsigned int ar_posix_acl:1; /* Enable posix acls */ 561 unsigned int ar_quota:2; /* off/account/on */ 562 unsigned int ar_suiddir:1; /* suiddir support */ 563 unsigned int ar_data:2; /* ordered/writeback */ 564 unsigned int ar_meta:1; /* mount metafs */ 565 unsigned int ar_discard:1; /* discard requests */ 566 unsigned int ar_errors:2; /* errors=withdraw | deactivate | panic */ 567 unsigned int ar_nobarrier:1; /* do not send barriers */ 568 unsigned int ar_rgrplvb:1; /* use lvbs for rgrp info */ 569 unsigned int ar_got_rgrplvb:1; /* Was the rgrplvb opt given? */ 570 unsigned int ar_loccookie:1; /* use location based readdir 571 cookies */ 572 s32 ar_commit; /* Commit interval */ 573 s32 ar_statfs_quantum; /* The fast statfs interval */ 574 s32 ar_quota_quantum; /* The quota interval */ 575 s32 ar_statfs_percent; /* The % change to force sync */ 576 }; 577 578 struct gfs2_tune { 579 spinlock_t gt_spin; 580 581 unsigned int gt_logd_secs; 582 583 unsigned int gt_quota_warn_period; /* Secs between quota warn msgs */ 584 unsigned int gt_quota_scale_num; /* Numerator */ 585 unsigned int gt_quota_scale_den; /* Denominator */ 586 unsigned int gt_quota_quantum; /* Secs between syncs to quota file */ 587 unsigned int gt_new_files_jdata; 588 unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */ 589 unsigned int gt_complain_secs; 590 unsigned int gt_statfs_quantum; 591 unsigned int gt_statfs_slow; 592 unsigned int gt_withdraw_helper_timeout; 593 }; 594 595 enum { 596 SDF_JOURNAL_CHECKED = 0, 597 SDF_JOURNAL_LIVE = 1, 598 SDF_WITHDRAWN = 2, 599 SDF_NOBARRIERS = 3, 600 SDF_NORECOVERY = 4, 601 SDF_DEMOTE = 5, 602 SDF_NOJOURNALID = 6, 603 SDF_RORECOVERY = 7, /* read only recovery */ 604 SDF_SKIP_DLM_UNLOCK = 8, 605 SDF_FORCE_AIL_FLUSH = 9, 606 SDF_FREEZE_INITIATOR = 10, 607 SDF_KILL = 15, 608 SDF_EVICTING = 16, 609 SDF_FROZEN = 17, 610 }; 611 612 #define GFS2_FSNAME_LEN 256 613 614 struct gfs2_inum_host { 615 u64 no_formal_ino; 616 u64 no_addr; 617 }; 618 619 struct gfs2_sb_host { 620 u32 sb_magic; 621 u32 sb_type; 622 623 u32 sb_fs_format; 624 u32 sb_multihost_format; 625 u32 sb_bsize; 626 u32 sb_bsize_shift; 627 628 struct gfs2_inum_host sb_master_dir; 629 struct gfs2_inum_host sb_root_dir; 630 631 char sb_lockproto[GFS2_LOCKNAME_LEN]; 632 char sb_locktable[GFS2_LOCKNAME_LEN]; 633 }; 634 635 /* 636 * lm_mount() return values 637 * 638 * ls_jid - the journal ID this node should use 639 * ls_first - this node is the first to mount the file system 640 * ls_lockspace - lock module's context for this file system 641 * ls_ops - lock module's functions 642 */ 643 644 struct lm_lockstruct { 645 int ls_jid; 646 unsigned int ls_first; 647 const struct lm_lockops *ls_ops; 648 dlm_lockspace_t *ls_dlm; 649 650 int ls_recover_jid_done; /* These two are deprecated, */ 651 int ls_recover_jid_status; /* used previously by gfs_controld */ 652 653 struct dlm_lksb ls_mounted_lksb; /* mounted_lock */ 654 struct dlm_lksb ls_control_lksb; /* control_lock */ 655 char ls_control_lvb[GDLM_LVB_SIZE]; /* control_lock lvb */ 656 struct completion ls_sync_wait; /* {control,mounted}_{lock,unlock} */ 657 char *ls_lvb_bits; 658 659 struct rw_semaphore ls_sem; 660 661 spinlock_t ls_recover_spin; /* protects following fields */ 662 unsigned long ls_recover_flags; /* DFL_ */ 663 uint32_t ls_recover_mount; /* gen in first recover_done cb */ 664 uint32_t ls_recover_start; /* gen in last recover_done cb */ 665 uint32_t ls_recover_block; /* copy recover_start in last recover_prep */ 666 uint32_t ls_recover_size; /* size of recover_submit, recover_result */ 667 uint32_t *ls_recover_submit; /* gen in last recover_slot cb per jid */ 668 uint32_t *ls_recover_result; /* result of last jid recovery */ 669 }; 670 671 struct gfs2_pcpu_lkstats { 672 /* One struct for each glock type */ 673 struct gfs2_lkstats lkstats[10]; 674 }; 675 676 /* List of local (per node) statfs inodes */ 677 struct local_statfs_inode { 678 struct list_head si_list; 679 struct inode *si_sc_inode; 680 unsigned int si_jid; /* journal id this statfs inode corresponds to */ 681 }; 682 683 struct gfs2_sbd { 684 struct super_block *sd_vfs; 685 struct gfs2_pcpu_lkstats __percpu *sd_lkstats; 686 struct kobject sd_kobj; 687 struct completion sd_kobj_unregister; 688 unsigned long sd_flags; /* SDF_... */ 689 struct gfs2_sb_host sd_sb; 690 691 /* Constants computed on mount */ 692 693 u32 sd_fsb2bb; 694 u32 sd_fsb2bb_shift; 695 u32 sd_diptrs; /* Number of pointers in a dinode */ 696 u32 sd_inptrs; /* Number of pointers in a indirect block */ 697 u32 sd_ldptrs; /* Number of pointers in a log descriptor block */ 698 u32 sd_jbsize; /* Size of a journaled data block */ 699 u32 sd_hash_bsize; /* sizeof(exhash block) */ 700 u32 sd_hash_bsize_shift; 701 u32 sd_hash_ptrs; /* Number of pointers in a hash block */ 702 u32 sd_qc_per_block; 703 u32 sd_blocks_per_bitmap; 704 u32 sd_max_dirres; /* Max blocks needed to add a directory entry */ 705 u32 sd_max_height; /* Max height of a file's metadata tree */ 706 u64 sd_heightsize[GFS2_MAX_META_HEIGHT + 1]; 707 u32 sd_max_dents_per_leaf; /* Max number of dirents in a leaf block */ 708 709 struct gfs2_args sd_args; /* Mount arguments */ 710 struct gfs2_tune sd_tune; /* Filesystem tuning structure */ 711 712 /* Lock Stuff */ 713 714 struct lm_lockstruct sd_lockstruct; 715 struct gfs2_holder sd_live_gh; 716 struct gfs2_glock *sd_rename_gl; 717 struct gfs2_glock *sd_freeze_gl; 718 struct work_struct sd_freeze_work; 719 struct work_struct sd_withdraw_work; 720 wait_queue_head_t sd_kill_wait; 721 wait_queue_head_t sd_async_glock_wait; 722 atomic_t sd_glock_disposal; 723 struct completion sd_locking_init; 724 struct completion sd_withdraw_helper; 725 int sd_withdraw_helper_status; 726 struct delayed_work sd_control_work; 727 728 /* Inode Stuff */ 729 730 struct dentry *sd_master_dir; 731 struct dentry *sd_root_dir; 732 733 struct inode *sd_jindex; 734 struct inode *sd_statfs_inode; 735 struct inode *sd_sc_inode; 736 struct list_head sd_sc_inodes_list; 737 struct inode *sd_qc_inode; 738 struct inode *sd_rindex; 739 struct inode *sd_quota_inode; 740 741 /* StatFS stuff */ 742 743 spinlock_t sd_statfs_spin; 744 struct gfs2_statfs_change_host sd_statfs_master; 745 struct gfs2_statfs_change_host sd_statfs_local; 746 int sd_statfs_force_sync; 747 748 /* Resource group stuff */ 749 750 int sd_rindex_uptodate; 751 spinlock_t sd_rindex_spin; 752 struct rb_root sd_rindex_tree; 753 unsigned int sd_rgrps; 754 unsigned int sd_max_rg_data; 755 756 /* Journal index stuff */ 757 758 struct list_head sd_jindex_list; 759 spinlock_t sd_jindex_spin; 760 struct mutex sd_jindex_mutex; 761 unsigned int sd_journals; 762 763 struct gfs2_jdesc *sd_jdesc; 764 struct gfs2_holder sd_journal_gh; 765 struct gfs2_holder sd_jinode_gh; 766 767 struct gfs2_holder sd_sc_gh; 768 struct buffer_head *sd_sc_bh; 769 struct gfs2_holder sd_qc_gh; 770 771 struct completion sd_journal_ready; 772 773 /* Workqueue stuff */ 774 775 struct workqueue_struct *sd_glock_wq; 776 struct workqueue_struct *sd_delete_wq; 777 778 /* Daemon stuff */ 779 780 struct task_struct *sd_logd_process; 781 struct task_struct *sd_quotad_process; 782 783 /* Quota stuff */ 784 785 struct list_head sd_quota_list; 786 atomic_t sd_quota_count; 787 struct mutex sd_quota_sync_mutex; 788 wait_queue_head_t sd_quota_wait; 789 790 unsigned int sd_quota_slots; 791 unsigned long *sd_quota_bitmap; 792 spinlock_t sd_bitmap_lock; 793 794 u64 sd_quota_sync_gen; 795 796 /* Log stuff */ 797 798 struct inode *sd_inode; 799 800 spinlock_t sd_log_lock; 801 802 struct gfs2_trans *sd_log_tr; 803 unsigned int sd_log_blks_reserved; 804 805 atomic_t sd_log_pinned; 806 unsigned int sd_log_num_revoke; 807 808 struct list_head sd_log_revokes; 809 struct list_head sd_log_ordered; 810 spinlock_t sd_ordered_lock; 811 812 atomic_t sd_log_thresh1; 813 atomic_t sd_log_thresh2; 814 atomic_t sd_log_blks_free; 815 atomic_t sd_log_blks_needed; 816 atomic_t sd_log_revokes_available; 817 wait_queue_head_t sd_log_waitq; 818 wait_queue_head_t sd_logd_waitq; 819 820 u64 sd_log_sequence; 821 int sd_log_idle; 822 823 struct rw_semaphore sd_log_flush_lock; 824 atomic_t sd_log_in_flight; 825 wait_queue_head_t sd_log_flush_wait; 826 int sd_log_error; /* First log error */ 827 828 unsigned int sd_log_tail; 829 unsigned int sd_log_flush_tail; 830 unsigned int sd_log_head; 831 unsigned int sd_log_flush_head; 832 833 spinlock_t sd_ail_lock; 834 struct list_head sd_ail1_list; 835 struct list_head sd_ail2_list; 836 837 /* For quiescing the filesystem */ 838 struct gfs2_holder sd_freeze_gh; 839 struct mutex sd_freeze_mutex; 840 struct list_head sd_dead_glocks; 841 842 char sd_fsname[GFS2_FSNAME_LEN + 3 * sizeof(int) + 2]; 843 char sd_table_name[GFS2_FSNAME_LEN]; 844 char sd_proto_name[GFS2_FSNAME_LEN]; 845 846 /* Debugging crud */ 847 848 unsigned long sd_last_warning; 849 struct dentry *debugfs_dir; /* debugfs directory */ 850 }; 851 852 #define glock_sbd(gl) ((gl)->gl_name.ln_sbd) 853 854 #define GFS2_BAD_INO 1 855 856 static inline struct address_space *gfs2_aspace(struct gfs2_sbd *sdp) 857 { 858 return sdp->sd_inode->i_mapping; 859 } 860 861 static inline void gfs2_glstats_inc(struct gfs2_glock *gl, int which) 862 { 863 gl->gl_stats.stats[which]++; 864 } 865 866 static inline void gfs2_sbstats_inc(const struct gfs2_glock *gl, int which) 867 { 868 const struct gfs2_sbd *sdp = glock_sbd(gl); 869 preempt_disable(); 870 this_cpu_ptr(sdp->sd_lkstats)->lkstats[glock_type(gl)].stats[which]++; 871 preempt_enable(); 872 } 873 874 struct gfs2_rgrpd *gfs2_glock2rgrp(struct gfs2_glock *gl); 875 876 static inline unsigned gfs2_max_stuffed_size(const struct gfs2_inode *ip) 877 { 878 return GFS2_SB(&ip->i_inode)->sd_sb.sb_bsize - sizeof(struct gfs2_dinode); 879 } 880 881 #endif /* __INCORE_DOT_H__ */ 882 883