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 /* 207 * We are using struct lm_lockname as an rhashtable key. Avoid holes within 208 * the struct; padding at the end is fine. 209 */ 210 struct lm_lockname { 211 u64 ln_number; 212 struct gfs2_sbd *ln_sbd; 213 unsigned int ln_type; 214 }; 215 216 #define lm_name_equal(name1, name2) \ 217 (((name1)->ln_number == (name2)->ln_number) && \ 218 ((name1)->ln_type == (name2)->ln_type) && \ 219 ((name1)->ln_sbd == (name2)->ln_sbd)) 220 221 222 struct gfs2_glock_operations { 223 void (*go_sync) (struct gfs2_glock *gl); 224 int (*go_xmote_bh) (struct gfs2_glock *gl, struct gfs2_holder *gh); 225 void (*go_inval) (struct gfs2_glock *gl, int flags); 226 int (*go_demote_ok) (const struct gfs2_glock *gl); 227 int (*go_lock) (struct gfs2_holder *gh); 228 void (*go_unlock) (struct gfs2_holder *gh); 229 void (*go_dump)(struct seq_file *seq, const struct gfs2_glock *gl); 230 void (*go_callback)(struct gfs2_glock *gl, bool remote); 231 const int go_type; 232 const unsigned long go_flags; 233 #define GLOF_ASPACE 1 234 #define GLOF_LVB 2 235 #define GLOF_LRU 4 236 }; 237 238 enum { 239 GFS2_LKS_SRTT = 0, /* Non blocking smoothed round trip time */ 240 GFS2_LKS_SRTTVAR = 1, /* Non blocking smoothed variance */ 241 GFS2_LKS_SRTTB = 2, /* Blocking smoothed round trip time */ 242 GFS2_LKS_SRTTVARB = 3, /* Blocking smoothed variance */ 243 GFS2_LKS_SIRT = 4, /* Smoothed Inter-request time */ 244 GFS2_LKS_SIRTVAR = 5, /* Smoothed Inter-request variance */ 245 GFS2_LKS_DCOUNT = 6, /* Count of dlm requests */ 246 GFS2_LKS_QCOUNT = 7, /* Count of gfs2_holder queues */ 247 GFS2_NR_LKSTATS 248 }; 249 250 struct gfs2_lkstats { 251 u64 stats[GFS2_NR_LKSTATS]; 252 }; 253 254 enum { 255 /* States */ 256 HIF_HOLDER = 6, /* Set for gh that "holds" the glock */ 257 HIF_FIRST = 7, 258 HIF_WAIT = 10, 259 }; 260 261 struct gfs2_holder { 262 struct list_head gh_list; 263 264 struct gfs2_glock *gh_gl; 265 struct pid *gh_owner_pid; 266 u16 gh_flags; 267 u16 gh_state; 268 269 int gh_error; 270 unsigned long gh_iflags; /* HIF_... */ 271 unsigned long gh_ip; 272 }; 273 274 /* Number of quota types we support */ 275 #define GFS2_MAXQUOTAS 2 276 277 struct gfs2_qadata { /* quota allocation data */ 278 /* Quota stuff */ 279 struct gfs2_quota_data *qa_qd[2 * GFS2_MAXQUOTAS]; 280 struct gfs2_holder qa_qd_ghs[2 * GFS2_MAXQUOTAS]; 281 unsigned int qa_qd_num; 282 }; 283 284 /* Resource group multi-block reservation, in order of appearance: 285 286 Step 1. Function prepares to write, allocates a mb, sets the size hint. 287 Step 2. User calls inplace_reserve to target an rgrp, sets the rgrp info 288 Step 3. Function get_local_rgrp locks the rgrp, determines which bits to use 289 Step 4. Bits are assigned from the rgrp based on either the reservation 290 or wherever it can. 291 */ 292 293 struct gfs2_blkreserv { 294 /* components used during write (step 1): */ 295 atomic_t rs_sizehint; /* hint of the write size */ 296 297 struct gfs2_holder rs_rgd_gh; /* Filled in by get_local_rgrp */ 298 struct rb_node rs_node; /* link to other block reservations */ 299 struct gfs2_rbm rs_rbm; /* Start of reservation */ 300 u32 rs_free; /* how many blocks are still free */ 301 u64 rs_inum; /* Inode number for reservation */ 302 }; 303 304 /* 305 * Allocation parameters 306 * @target: The number of blocks we'd ideally like to allocate 307 * @aflags: The flags (e.g. Orlov flag) 308 * 309 * The intent is to gradually expand this structure over time in 310 * order to give more information, e.g. alignment, min extent size 311 * to the allocation code. 312 */ 313 struct gfs2_alloc_parms { 314 u64 target; 315 u32 min_target; 316 u32 aflags; 317 u64 allowed; 318 }; 319 320 enum { 321 GLF_LOCK = 1, 322 GLF_DEMOTE = 3, 323 GLF_PENDING_DEMOTE = 4, 324 GLF_DEMOTE_IN_PROGRESS = 5, 325 GLF_DIRTY = 6, 326 GLF_LFLUSH = 7, 327 GLF_INVALIDATE_IN_PROGRESS = 8, 328 GLF_REPLY_PENDING = 9, 329 GLF_INITIAL = 10, 330 GLF_FROZEN = 11, 331 GLF_QUEUED = 12, 332 GLF_LRU = 13, 333 GLF_OBJECT = 14, /* Used only for tracing */ 334 GLF_BLOCKING = 15, 335 GLF_INODE_CREATING = 16, /* Inode creation occurring */ 336 }; 337 338 struct gfs2_glock { 339 unsigned long gl_flags; /* GLF_... */ 340 struct lm_lockname gl_name; 341 342 struct lockref gl_lockref; 343 344 /* State fields protected by gl_lockref.lock */ 345 unsigned int gl_state:2, /* Current state */ 346 gl_target:2, /* Target state */ 347 gl_demote_state:2, /* State requested by remote node */ 348 gl_req:2, /* State in last dlm request */ 349 gl_reply:8; /* Last reply from the dlm */ 350 351 unsigned long gl_demote_time; /* time of first demote request */ 352 long gl_hold_time; 353 struct list_head gl_holders; 354 355 const struct gfs2_glock_operations *gl_ops; 356 ktime_t gl_dstamp; 357 struct gfs2_lkstats gl_stats; 358 struct dlm_lksb gl_lksb; 359 unsigned long gl_tchange; 360 void *gl_object; 361 362 struct list_head gl_lru; 363 struct list_head gl_ail_list; 364 atomic_t gl_ail_count; 365 atomic_t gl_revokes; 366 struct delayed_work gl_work; 367 union { 368 /* For inode and iopen glocks only */ 369 struct work_struct gl_delete; 370 /* For rgrp glocks only */ 371 struct { 372 loff_t start; 373 loff_t end; 374 } gl_vm; 375 }; 376 struct rcu_head gl_rcu; 377 struct rhash_head gl_node; 378 }; 379 380 #define GFS2_MIN_LVB_SIZE 32 /* Min size of LVB that gfs2 supports */ 381 382 enum { 383 GIF_INVALID = 0, 384 GIF_QD_LOCKED = 1, 385 GIF_ALLOC_FAILED = 2, 386 GIF_SW_PAGED = 3, 387 GIF_ORDERED = 4, 388 GIF_FREE_VFS_INODE = 5, 389 GIF_GLOP_PENDING = 6, 390 }; 391 392 struct gfs2_inode { 393 struct inode i_inode; 394 u64 i_no_addr; 395 u64 i_no_formal_ino; 396 u64 i_generation; 397 u64 i_eattr; 398 unsigned long i_flags; /* GIF_... */ 399 struct gfs2_glock *i_gl; /* Move into i_gh? */ 400 struct gfs2_holder i_iopen_gh; 401 struct gfs2_holder i_gh; /* for prepare/commit_write only */ 402 struct gfs2_qadata *i_qadata; /* quota allocation data */ 403 struct gfs2_blkreserv i_res; /* rgrp multi-block reservation */ 404 struct gfs2_rgrpd *i_rgd; 405 u64 i_goal; /* goal block for allocations */ 406 struct rw_semaphore i_rw_mutex; 407 struct list_head i_ordered; 408 struct list_head i_trunc_list; 409 __be64 *i_hash_cache; 410 u32 i_entries; 411 u32 i_diskflags; 412 u8 i_height; 413 u8 i_depth; 414 u16 i_rahead; 415 }; 416 417 /* 418 * Since i_inode is the first element of struct gfs2_inode, 419 * this is effectively a cast. 420 */ 421 static inline struct gfs2_inode *GFS2_I(struct inode *inode) 422 { 423 return container_of(inode, struct gfs2_inode, i_inode); 424 } 425 426 static inline struct gfs2_sbd *GFS2_SB(const struct inode *inode) 427 { 428 return inode->i_sb->s_fs_info; 429 } 430 431 struct gfs2_file { 432 struct mutex f_fl_mutex; 433 struct gfs2_holder f_fl_gh; 434 }; 435 436 struct gfs2_revoke_replay { 437 struct list_head rr_list; 438 u64 rr_blkno; 439 unsigned int rr_where; 440 }; 441 442 enum { 443 QDF_CHANGE = 1, 444 QDF_LOCKED = 2, 445 QDF_REFRESH = 3, 446 QDF_QMSG_QUIET = 4, 447 }; 448 449 struct gfs2_quota_data { 450 struct hlist_bl_node qd_hlist; 451 struct list_head qd_list; 452 struct kqid qd_id; 453 struct gfs2_sbd *qd_sbd; 454 struct lockref qd_lockref; 455 struct list_head qd_lru; 456 unsigned qd_hash; 457 458 unsigned long qd_flags; /* QDF_... */ 459 460 s64 qd_change; 461 s64 qd_change_sync; 462 463 unsigned int qd_slot; 464 unsigned int qd_slot_count; 465 466 struct buffer_head *qd_bh; 467 struct gfs2_quota_change *qd_bh_qc; 468 unsigned int qd_bh_count; 469 470 struct gfs2_glock *qd_gl; 471 struct gfs2_quota_lvb qd_qb; 472 473 u64 qd_sync_gen; 474 unsigned long qd_last_warn; 475 struct rcu_head qd_rcu; 476 }; 477 478 enum { 479 TR_TOUCHED = 1, 480 TR_ATTACHED = 2, 481 TR_ALLOCED = 3, 482 }; 483 484 struct gfs2_trans { 485 unsigned long tr_ip; 486 487 unsigned int tr_blocks; 488 unsigned int tr_revokes; 489 unsigned int tr_reserved; 490 unsigned long tr_flags; 491 492 unsigned int tr_num_buf_new; 493 unsigned int tr_num_databuf_new; 494 unsigned int tr_num_buf_rm; 495 unsigned int tr_num_databuf_rm; 496 unsigned int tr_num_revoke; 497 unsigned int tr_num_revoke_rm; 498 499 struct list_head tr_list; 500 struct list_head tr_databuf; 501 struct list_head tr_buf; 502 503 unsigned int tr_first; 504 struct list_head tr_ail1_list; 505 struct list_head tr_ail2_list; 506 }; 507 508 struct gfs2_journal_extent { 509 struct list_head list; 510 511 unsigned int lblock; /* First logical block */ 512 u64 dblock; /* First disk block */ 513 u64 blocks; 514 }; 515 516 struct gfs2_jdesc { 517 struct list_head jd_list; 518 struct list_head extent_list; 519 unsigned int nr_extents; 520 struct work_struct jd_work; 521 struct inode *jd_inode; 522 unsigned long jd_flags; 523 #define JDF_RECOVERY 1 524 unsigned int jd_jid; 525 unsigned int jd_blocks; 526 int jd_recover_error; 527 /* Replay stuff */ 528 529 unsigned int jd_found_blocks; 530 unsigned int jd_found_revokes; 531 unsigned int jd_replayed_blocks; 532 533 struct list_head jd_revoke_list; 534 unsigned int jd_replay_tail; 535 536 }; 537 538 struct gfs2_statfs_change_host { 539 s64 sc_total; 540 s64 sc_free; 541 s64 sc_dinodes; 542 }; 543 544 #define GFS2_QUOTA_DEFAULT GFS2_QUOTA_OFF 545 #define GFS2_QUOTA_OFF 0 546 #define GFS2_QUOTA_ACCOUNT 1 547 #define GFS2_QUOTA_ON 2 548 549 #define GFS2_DATA_DEFAULT GFS2_DATA_ORDERED 550 #define GFS2_DATA_WRITEBACK 1 551 #define GFS2_DATA_ORDERED 2 552 553 #define GFS2_ERRORS_DEFAULT GFS2_ERRORS_WITHDRAW 554 #define GFS2_ERRORS_WITHDRAW 0 555 #define GFS2_ERRORS_CONTINUE 1 /* place holder for future feature */ 556 #define GFS2_ERRORS_RO 2 /* place holder for future feature */ 557 #define GFS2_ERRORS_PANIC 3 558 559 struct gfs2_args { 560 char ar_lockproto[GFS2_LOCKNAME_LEN]; /* Name of the Lock Protocol */ 561 char ar_locktable[GFS2_LOCKNAME_LEN]; /* Name of the Lock Table */ 562 char ar_hostdata[GFS2_LOCKNAME_LEN]; /* Host specific data */ 563 unsigned int ar_spectator:1; /* Don't get a journal */ 564 unsigned int ar_localflocks:1; /* Let the VFS do flock|fcntl */ 565 unsigned int ar_debug:1; /* Oops on errors */ 566 unsigned int ar_posix_acl:1; /* Enable posix acls */ 567 unsigned int ar_quota:2; /* off/account/on */ 568 unsigned int ar_suiddir:1; /* suiddir support */ 569 unsigned int ar_data:2; /* ordered/writeback */ 570 unsigned int ar_meta:1; /* mount metafs */ 571 unsigned int ar_discard:1; /* discard requests */ 572 unsigned int ar_errors:2; /* errors=withdraw | panic */ 573 unsigned int ar_nobarrier:1; /* do not send barriers */ 574 unsigned int ar_rgrplvb:1; /* use lvbs for rgrp info */ 575 unsigned int ar_loccookie:1; /* use location based readdir 576 cookies */ 577 int ar_commit; /* Commit interval */ 578 int ar_statfs_quantum; /* The fast statfs interval */ 579 int ar_quota_quantum; /* The quota interval */ 580 int ar_statfs_percent; /* The % change to force sync */ 581 }; 582 583 struct gfs2_tune { 584 spinlock_t gt_spin; 585 586 unsigned int gt_logd_secs; 587 588 unsigned int gt_quota_warn_period; /* Secs between quota warn msgs */ 589 unsigned int gt_quota_scale_num; /* Numerator */ 590 unsigned int gt_quota_scale_den; /* Denominator */ 591 unsigned int gt_quota_quantum; /* Secs between syncs to quota file */ 592 unsigned int gt_new_files_jdata; 593 unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */ 594 unsigned int gt_complain_secs; 595 unsigned int gt_statfs_quantum; 596 unsigned int gt_statfs_slow; 597 }; 598 599 enum { 600 SDF_JOURNAL_CHECKED = 0, 601 SDF_JOURNAL_LIVE = 1, 602 SDF_SHUTDOWN = 2, 603 SDF_NOBARRIERS = 3, 604 SDF_NORECOVERY = 4, 605 SDF_DEMOTE = 5, 606 SDF_NOJOURNALID = 6, 607 SDF_RORECOVERY = 7, /* read only recovery */ 608 SDF_SKIP_DLM_UNLOCK = 8, 609 }; 610 611 enum gfs2_freeze_state { 612 SFS_UNFROZEN = 0, 613 SFS_STARTING_FREEZE = 1, 614 SFS_FROZEN = 2, 615 }; 616 617 #define GFS2_FSNAME_LEN 256 618 619 struct gfs2_inum_host { 620 u64 no_formal_ino; 621 u64 no_addr; 622 }; 623 624 struct gfs2_sb_host { 625 u32 sb_magic; 626 u32 sb_type; 627 u32 sb_format; 628 629 u32 sb_fs_format; 630 u32 sb_multihost_format; 631 u32 sb_bsize; 632 u32 sb_bsize_shift; 633 634 struct gfs2_inum_host sb_master_dir; 635 struct gfs2_inum_host sb_root_dir; 636 637 char sb_lockproto[GFS2_LOCKNAME_LEN]; 638 char sb_locktable[GFS2_LOCKNAME_LEN]; 639 }; 640 641 /* 642 * lm_mount() return values 643 * 644 * ls_jid - the journal ID this node should use 645 * ls_first - this node is the first to mount the file system 646 * ls_lockspace - lock module's context for this file system 647 * ls_ops - lock module's functions 648 */ 649 650 struct lm_lockstruct { 651 int ls_jid; 652 unsigned int ls_first; 653 const struct lm_lockops *ls_ops; 654 dlm_lockspace_t *ls_dlm; 655 656 int ls_recover_jid_done; /* These two are deprecated, */ 657 int ls_recover_jid_status; /* used previously by gfs_controld */ 658 659 struct dlm_lksb ls_mounted_lksb; /* mounted_lock */ 660 struct dlm_lksb ls_control_lksb; /* control_lock */ 661 char ls_control_lvb[GDLM_LVB_SIZE]; /* control_lock lvb */ 662 struct completion ls_sync_wait; /* {control,mounted}_{lock,unlock} */ 663 char *ls_lvb_bits; 664 665 spinlock_t ls_recover_spin; /* protects following fields */ 666 unsigned long ls_recover_flags; /* DFL_ */ 667 uint32_t ls_recover_mount; /* gen in first recover_done cb */ 668 uint32_t ls_recover_start; /* gen in last recover_done cb */ 669 uint32_t ls_recover_block; /* copy recover_start in last recover_prep */ 670 uint32_t ls_recover_size; /* size of recover_submit, recover_result */ 671 uint32_t *ls_recover_submit; /* gen in last recover_slot cb per jid */ 672 uint32_t *ls_recover_result; /* result of last jid recovery */ 673 }; 674 675 struct gfs2_pcpu_lkstats { 676 /* One struct for each glock type */ 677 struct gfs2_lkstats lkstats[10]; 678 }; 679 680 struct gfs2_sbd { 681 struct super_block *sd_vfs; 682 struct gfs2_pcpu_lkstats __percpu *sd_lkstats; 683 struct kobject sd_kobj; 684 unsigned long sd_flags; /* SDF_... */ 685 struct gfs2_sb_host sd_sb; 686 687 /* Constants computed on mount */ 688 689 u32 sd_fsb2bb; 690 u32 sd_fsb2bb_shift; 691 u32 sd_diptrs; /* Number of pointers in a dinode */ 692 u32 sd_inptrs; /* Number of pointers in a indirect block */ 693 u32 sd_jbsize; /* Size of a journaled data block */ 694 u32 sd_hash_bsize; /* sizeof(exhash block) */ 695 u32 sd_hash_bsize_shift; 696 u32 sd_hash_ptrs; /* Number of pointers in a hash block */ 697 u32 sd_qc_per_block; 698 u32 sd_blocks_per_bitmap; 699 u32 sd_max_dirres; /* Max blocks needed to add a directory entry */ 700 u32 sd_max_height; /* Max height of a file's metadata tree */ 701 u64 sd_heightsize[GFS2_MAX_META_HEIGHT + 1]; 702 u32 sd_max_jheight; /* Max height of journaled file's meta tree */ 703 u64 sd_jheightsize[GFS2_MAX_META_HEIGHT + 1]; 704 u32 sd_max_dents_per_leaf; /* Max number of dirents in a leaf block */ 705 706 struct gfs2_args sd_args; /* Mount arguments */ 707 struct gfs2_tune sd_tune; /* Filesystem tuning structure */ 708 709 /* Lock Stuff */ 710 711 struct lm_lockstruct sd_lockstruct; 712 struct gfs2_holder sd_live_gh; 713 struct gfs2_glock *sd_rename_gl; 714 struct gfs2_glock *sd_freeze_gl; 715 struct work_struct sd_freeze_work; 716 wait_queue_head_t sd_glock_wait; 717 atomic_t sd_glock_disposal; 718 struct completion sd_locking_init; 719 struct completion sd_wdack; 720 struct delayed_work sd_control_work; 721 722 /* Inode Stuff */ 723 724 struct dentry *sd_master_dir; 725 struct dentry *sd_root_dir; 726 727 struct inode *sd_jindex; 728 struct inode *sd_statfs_inode; 729 struct inode *sd_sc_inode; 730 struct inode *sd_qc_inode; 731 struct inode *sd_rindex; 732 struct inode *sd_quota_inode; 733 734 /* StatFS stuff */ 735 736 spinlock_t sd_statfs_spin; 737 struct gfs2_statfs_change_host sd_statfs_master; 738 struct gfs2_statfs_change_host sd_statfs_local; 739 int sd_statfs_force_sync; 740 741 /* Resource group stuff */ 742 743 int sd_rindex_uptodate; 744 spinlock_t sd_rindex_spin; 745 struct rb_root sd_rindex_tree; 746 unsigned int sd_rgrps; 747 unsigned int sd_max_rg_data; 748 749 /* Journal index stuff */ 750 751 struct list_head sd_jindex_list; 752 spinlock_t sd_jindex_spin; 753 struct mutex sd_jindex_mutex; 754 unsigned int sd_journals; 755 756 struct gfs2_jdesc *sd_jdesc; 757 struct gfs2_holder sd_journal_gh; 758 struct gfs2_holder sd_jinode_gh; 759 760 struct gfs2_holder sd_sc_gh; 761 struct gfs2_holder sd_qc_gh; 762 763 struct completion sd_journal_ready; 764 765 /* Daemon stuff */ 766 767 struct task_struct *sd_logd_process; 768 struct task_struct *sd_quotad_process; 769 770 /* Quota stuff */ 771 772 struct list_head sd_quota_list; 773 atomic_t sd_quota_count; 774 struct mutex sd_quota_mutex; 775 struct mutex sd_quota_sync_mutex; 776 wait_queue_head_t sd_quota_wait; 777 struct list_head sd_trunc_list; 778 spinlock_t sd_trunc_lock; 779 780 unsigned int sd_quota_slots; 781 unsigned long *sd_quota_bitmap; 782 spinlock_t sd_bitmap_lock; 783 784 u64 sd_quota_sync_gen; 785 786 /* Log stuff */ 787 788 struct address_space sd_aspace; 789 790 spinlock_t sd_log_lock; 791 792 struct gfs2_trans *sd_log_tr; 793 unsigned int sd_log_blks_reserved; 794 int sd_log_commited_revoke; 795 796 atomic_t sd_log_pinned; 797 unsigned int sd_log_num_revoke; 798 799 struct list_head sd_log_le_revoke; 800 struct list_head sd_log_le_ordered; 801 spinlock_t sd_ordered_lock; 802 803 atomic_t sd_log_thresh1; 804 atomic_t sd_log_thresh2; 805 atomic_t sd_log_blks_free; 806 atomic_t sd_log_blks_needed; 807 wait_queue_head_t sd_log_waitq; 808 wait_queue_head_t sd_logd_waitq; 809 810 u64 sd_log_sequence; 811 unsigned int sd_log_head; 812 unsigned int sd_log_tail; 813 int sd_log_idle; 814 815 struct rw_semaphore sd_log_flush_lock; 816 atomic_t sd_log_in_flight; 817 struct bio *sd_log_bio; 818 wait_queue_head_t sd_log_flush_wait; 819 820 atomic_t sd_reserving_log; 821 wait_queue_head_t sd_reserving_log_wait; 822 823 unsigned int sd_log_flush_head; 824 825 spinlock_t sd_ail_lock; 826 struct list_head sd_ail1_list; 827 struct list_head sd_ail2_list; 828 829 /* For quiescing the filesystem */ 830 struct gfs2_holder sd_freeze_gh; 831 atomic_t sd_freeze_state; 832 struct mutex sd_freeze_mutex; 833 834 char sd_fsname[GFS2_FSNAME_LEN]; 835 char sd_table_name[GFS2_FSNAME_LEN]; 836 char sd_proto_name[GFS2_FSNAME_LEN]; 837 838 /* Debugging crud */ 839 840 unsigned long sd_last_warning; 841 struct dentry *debugfs_dir; /* debugfs directory */ 842 struct dentry *debugfs_dentry_glocks; 843 struct dentry *debugfs_dentry_glstats; 844 struct dentry *debugfs_dentry_sbstats; 845 }; 846 847 static inline void gfs2_glstats_inc(struct gfs2_glock *gl, int which) 848 { 849 gl->gl_stats.stats[which]++; 850 } 851 852 static inline void gfs2_sbstats_inc(const struct gfs2_glock *gl, int which) 853 { 854 const struct gfs2_sbd *sdp = gl->gl_name.ln_sbd; 855 preempt_disable(); 856 this_cpu_ptr(sdp->sd_lkstats)->lkstats[gl->gl_name.ln_type].stats[which]++; 857 preempt_enable(); 858 } 859 860 extern struct gfs2_rgrpd *gfs2_glock2rgrp(struct gfs2_glock *gl); 861 862 #endif /* __INCORE_DOT_H__ */ 863 864