1 /* 2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. 3 * Copyright (C) 2004-2008 Red Hat, Inc. All rights reserved. 4 * 5 * This copyrighted material is made available to anyone wishing to use, 6 * modify, copy, or redistribute it subject to the terms and conditions 7 * of the GNU General Public License version 2. 8 */ 9 10 #ifndef __INCORE_DOT_H__ 11 #define __INCORE_DOT_H__ 12 13 #include <linux/fs.h> 14 #include <linux/kobject.h> 15 #include <linux/workqueue.h> 16 #include <linux/dlm.h> 17 #include <linux/buffer_head.h> 18 #include <linux/rcupdate.h> 19 #include <linux/rculist_bl.h> 20 #include <linux/completion.h> 21 #include <linux/rbtree.h> 22 #include <linux/ktime.h> 23 #include <linux/percpu.h> 24 #include <linux/lockref.h> 25 #include <linux/rhashtable.h> 26 27 #define DIO_WAIT 0x00000010 28 #define DIO_METADATA 0x00000020 29 30 struct gfs2_log_operations; 31 struct gfs2_bufdata; 32 struct gfs2_holder; 33 struct gfs2_glock; 34 struct gfs2_quota_data; 35 struct gfs2_trans; 36 struct gfs2_jdesc; 37 struct gfs2_sbd; 38 struct lm_lockops; 39 40 typedef void (*gfs2_glop_bh_t) (struct gfs2_glock *gl, unsigned int ret); 41 42 struct gfs2_log_header_host { 43 u64 lh_sequence; /* Sequence number of this transaction */ 44 u32 lh_flags; /* GFS2_LOG_HEAD_... */ 45 u32 lh_tail; /* Block number of log tail */ 46 u32 lh_blkno; 47 u32 lh_hash; 48 }; 49 50 /* 51 * Structure of operations that are associated with each 52 * type of element in the log. 53 */ 54 55 struct gfs2_log_operations { 56 void (*lo_before_commit) (struct gfs2_sbd *sdp, struct gfs2_trans *tr); 57 void (*lo_after_commit) (struct gfs2_sbd *sdp, struct gfs2_trans *tr); 58 void (*lo_before_scan) (struct gfs2_jdesc *jd, 59 struct gfs2_log_header_host *head, int pass); 60 int (*lo_scan_elements) (struct gfs2_jdesc *jd, unsigned int start, 61 struct gfs2_log_descriptor *ld, __be64 *ptr, 62 int pass); 63 void (*lo_after_scan) (struct gfs2_jdesc *jd, int error, int pass); 64 const char *lo_name; 65 }; 66 67 #define GBF_FULL 1 68 69 struct gfs2_bitmap { 70 struct buffer_head *bi_bh; 71 char *bi_clone; 72 unsigned long bi_flags; 73 u32 bi_offset; 74 u32 bi_start; 75 u32 bi_len; 76 u32 bi_blocks; 77 }; 78 79 struct gfs2_rgrpd { 80 struct rb_node rd_node; /* Link with superblock */ 81 struct gfs2_glock *rd_gl; /* Glock for this rgrp */ 82 u64 rd_addr; /* grp block disk address */ 83 u64 rd_data0; /* first data location */ 84 u32 rd_length; /* length of rgrp header in fs blocks */ 85 u32 rd_data; /* num of data blocks in rgrp */ 86 u32 rd_bitbytes; /* number of bytes in data bitmaps */ 87 u32 rd_free; 88 u32 rd_reserved; /* number of blocks reserved */ 89 u32 rd_free_clone; 90 u32 rd_dinodes; 91 u64 rd_igeneration; 92 struct gfs2_bitmap *rd_bits; 93 struct gfs2_sbd *rd_sbd; 94 struct gfs2_rgrp_lvb *rd_rgl; 95 u32 rd_last_alloc; 96 u32 rd_flags; 97 u32 rd_extfail_pt; /* extent failure point */ 98 #define GFS2_RDF_CHECK 0x10000000 /* check for unlinked inodes */ 99 #define GFS2_RDF_UPTODATE 0x20000000 /* rg is up to date */ 100 #define GFS2_RDF_ERROR 0x40000000 /* error in rg */ 101 #define GFS2_RDF_PREFERRED 0x80000000 /* This rgrp is preferred */ 102 #define GFS2_RDF_MASK 0xf0000000 /* mask for internal flags */ 103 spinlock_t rd_rsspin; /* protects reservation related vars */ 104 struct rb_root rd_rstree; /* multi-block reservation tree */ 105 }; 106 107 struct gfs2_rbm { 108 struct gfs2_rgrpd *rgd; 109 u32 offset; /* The offset is bitmap relative */ 110 int bii; /* Bitmap index */ 111 }; 112 113 static inline struct gfs2_bitmap *rbm_bi(const struct gfs2_rbm *rbm) 114 { 115 return rbm->rgd->rd_bits + rbm->bii; 116 } 117 118 static inline u64 gfs2_rbm_to_block(const struct gfs2_rbm *rbm) 119 { 120 return rbm->rgd->rd_data0 + (rbm_bi(rbm)->bi_start * GFS2_NBBY) + 121 rbm->offset; 122 } 123 124 static inline bool gfs2_rbm_eq(const struct gfs2_rbm *rbm1, 125 const struct gfs2_rbm *rbm2) 126 { 127 return (rbm1->rgd == rbm2->rgd) && (rbm1->bii == rbm2->bii) && 128 (rbm1->offset == rbm2->offset); 129 } 130 131 enum gfs2_state_bits { 132 BH_Pinned = BH_PrivateStart, 133 BH_Escaped = BH_PrivateStart + 1, 134 BH_Zeronew = BH_PrivateStart + 2, 135 }; 136 137 BUFFER_FNS(Pinned, pinned) 138 TAS_BUFFER_FNS(Pinned, pinned) 139 BUFFER_FNS(Escaped, escaped) 140 TAS_BUFFER_FNS(Escaped, escaped) 141 BUFFER_FNS(Zeronew, zeronew) 142 TAS_BUFFER_FNS(Zeronew, zeronew) 143 144 struct gfs2_bufdata { 145 struct buffer_head *bd_bh; 146 struct gfs2_glock *bd_gl; 147 u64 bd_blkno; 148 149 struct list_head bd_list; 150 const struct gfs2_log_operations *bd_ops; 151 152 struct gfs2_trans *bd_tr; 153 struct list_head bd_ail_st_list; 154 struct list_head bd_ail_gl_list; 155 }; 156 157 /* 158 * Internally, we prefix things with gdlm_ and GDLM_ (for gfs-dlm) since a 159 * prefix of lock_dlm_ gets awkward. 160 */ 161 162 #define GDLM_STRNAME_BYTES 25 163 #define GDLM_LVB_SIZE 32 164 165 /* 166 * ls_recover_flags: 167 * 168 * DFL_BLOCK_LOCKS: dlm is in recovery and will grant locks that had been 169 * held by failed nodes whose journals need recovery. Those locks should 170 * only be used for journal recovery until the journal recovery is done. 171 * This is set by the dlm recover_prep callback and cleared by the 172 * gfs2_control thread when journal recovery is complete. To avoid 173 * races between recover_prep setting and gfs2_control clearing, recover_spin 174 * is held while changing this bit and reading/writing recover_block 175 * and recover_start. 176 * 177 * DFL_NO_DLM_OPS: dlm lockspace ops/callbacks are not being used. 178 * 179 * DFL_FIRST_MOUNT: this node is the first to mount this fs and is doing 180 * recovery of all journals before allowing other nodes to mount the fs. 181 * This is cleared when FIRST_MOUNT_DONE is set. 182 * 183 * DFL_FIRST_MOUNT_DONE: this node was the first mounter, and has finished 184 * recovery of all journals, and now allows other nodes to mount the fs. 185 * 186 * DFL_MOUNT_DONE: gdlm_mount has completed successfully and cleared 187 * BLOCK_LOCKS for the first time. The gfs2_control thread should now 188 * control clearing BLOCK_LOCKS for further recoveries. 189 * 190 * DFL_UNMOUNT: gdlm_unmount sets to keep sdp off gfs2_control_wq. 191 * 192 * DFL_DLM_RECOVERY: set while dlm is in recovery, between recover_prep() 193 * and recover_done(), i.e. set while recover_block == recover_start. 194 */ 195 196 enum { 197 DFL_BLOCK_LOCKS = 0, 198 DFL_NO_DLM_OPS = 1, 199 DFL_FIRST_MOUNT = 2, 200 DFL_FIRST_MOUNT_DONE = 3, 201 DFL_MOUNT_DONE = 4, 202 DFL_UNMOUNT = 5, 203 DFL_DLM_RECOVERY = 6, 204 }; 205 206 struct lm_lockname { 207 struct gfs2_sbd *ln_sbd; 208 u64 ln_number; 209 unsigned int ln_type; 210 }; 211 212 #define lm_name_equal(name1, name2) \ 213 (((name1)->ln_number == (name2)->ln_number) && \ 214 ((name1)->ln_type == (name2)->ln_type) && \ 215 ((name1)->ln_sbd == (name2)->ln_sbd)) 216 217 218 struct gfs2_glock_operations { 219 void (*go_sync) (struct gfs2_glock *gl); 220 int (*go_xmote_bh) (struct gfs2_glock *gl, struct gfs2_holder *gh); 221 void (*go_inval) (struct gfs2_glock *gl, int flags); 222 int (*go_demote_ok) (const struct gfs2_glock *gl); 223 int (*go_lock) (struct gfs2_holder *gh); 224 void (*go_unlock) (struct gfs2_holder *gh); 225 void (*go_dump)(struct seq_file *seq, const struct gfs2_glock *gl); 226 void (*go_callback)(struct gfs2_glock *gl, bool remote); 227 const int go_type; 228 const unsigned long go_flags; 229 #define GLOF_ASPACE 1 230 #define GLOF_LVB 2 231 #define GLOF_LRU 4 232 }; 233 234 enum { 235 GFS2_LKS_SRTT = 0, /* Non blocking smoothed round trip time */ 236 GFS2_LKS_SRTTVAR = 1, /* Non blocking smoothed variance */ 237 GFS2_LKS_SRTTB = 2, /* Blocking smoothed round trip time */ 238 GFS2_LKS_SRTTVARB = 3, /* Blocking smoothed variance */ 239 GFS2_LKS_SIRT = 4, /* Smoothed Inter-request time */ 240 GFS2_LKS_SIRTVAR = 5, /* Smoothed Inter-request variance */ 241 GFS2_LKS_DCOUNT = 6, /* Count of dlm requests */ 242 GFS2_LKS_QCOUNT = 7, /* Count of gfs2_holder queues */ 243 GFS2_NR_LKSTATS 244 }; 245 246 struct gfs2_lkstats { 247 u64 stats[GFS2_NR_LKSTATS]; 248 }; 249 250 enum { 251 /* States */ 252 HIF_HOLDER = 6, /* Set for gh that "holds" the glock */ 253 HIF_FIRST = 7, 254 HIF_WAIT = 10, 255 }; 256 257 struct gfs2_holder { 258 struct list_head gh_list; 259 260 struct gfs2_glock *gh_gl; 261 struct pid *gh_owner_pid; 262 u16 gh_flags; 263 u16 gh_state; 264 265 int gh_error; 266 unsigned long gh_iflags; /* HIF_... */ 267 unsigned long gh_ip; 268 }; 269 270 /* Number of quota types we support */ 271 #define GFS2_MAXQUOTAS 2 272 273 struct gfs2_qadata { /* quota allocation data */ 274 /* Quota stuff */ 275 struct gfs2_quota_data *qa_qd[2 * GFS2_MAXQUOTAS]; 276 struct gfs2_holder qa_qd_ghs[2 * GFS2_MAXQUOTAS]; 277 unsigned int qa_qd_num; 278 }; 279 280 /* Resource group multi-block reservation, in order of appearance: 281 282 Step 1. Function prepares to write, allocates a mb, sets the size hint. 283 Step 2. User calls inplace_reserve to target an rgrp, sets the rgrp info 284 Step 3. Function get_local_rgrp locks the rgrp, determines which bits to use 285 Step 4. Bits are assigned from the rgrp based on either the reservation 286 or wherever it can. 287 */ 288 289 struct gfs2_blkreserv { 290 /* components used during write (step 1): */ 291 atomic_t rs_sizehint; /* hint of the write size */ 292 293 struct gfs2_holder rs_rgd_gh; /* Filled in by get_local_rgrp */ 294 struct rb_node rs_node; /* link to other block reservations */ 295 struct gfs2_rbm rs_rbm; /* Start of reservation */ 296 u32 rs_free; /* how many blocks are still free */ 297 u64 rs_inum; /* Inode number for reservation */ 298 }; 299 300 /* 301 * Allocation parameters 302 * @target: The number of blocks we'd ideally like to allocate 303 * @aflags: The flags (e.g. Orlov flag) 304 * 305 * The intent is to gradually expand this structure over time in 306 * order to give more information, e.g. alignment, min extent size 307 * to the allocation code. 308 */ 309 struct gfs2_alloc_parms { 310 u64 target; 311 u32 min_target; 312 u32 aflags; 313 u64 allowed; 314 }; 315 316 enum { 317 GLF_LOCK = 1, 318 GLF_DEMOTE = 3, 319 GLF_PENDING_DEMOTE = 4, 320 GLF_DEMOTE_IN_PROGRESS = 5, 321 GLF_DIRTY = 6, 322 GLF_LFLUSH = 7, 323 GLF_INVALIDATE_IN_PROGRESS = 8, 324 GLF_REPLY_PENDING = 9, 325 GLF_INITIAL = 10, 326 GLF_FROZEN = 11, 327 GLF_QUEUED = 12, 328 GLF_LRU = 13, 329 GLF_OBJECT = 14, /* Used only for tracing */ 330 GLF_BLOCKING = 15, 331 GLF_INODE_CREATING = 16, /* Inode creation occurring */ 332 }; 333 334 struct gfs2_glock { 335 struct hlist_bl_node gl_list; 336 unsigned long gl_flags; /* GLF_... */ 337 struct lm_lockname gl_name; 338 339 struct lockref gl_lockref; 340 341 /* State fields protected by gl_lockref.lock */ 342 unsigned int gl_state:2, /* Current state */ 343 gl_target:2, /* Target state */ 344 gl_demote_state:2, /* State requested by remote node */ 345 gl_req:2, /* State in last dlm request */ 346 gl_reply:8; /* Last reply from the dlm */ 347 348 unsigned long gl_demote_time; /* time of first demote request */ 349 long gl_hold_time; 350 struct list_head gl_holders; 351 352 const struct gfs2_glock_operations *gl_ops; 353 ktime_t gl_dstamp; 354 struct gfs2_lkstats gl_stats; 355 struct dlm_lksb gl_lksb; 356 unsigned long gl_tchange; 357 void *gl_object; 358 359 struct list_head gl_lru; 360 struct list_head gl_ail_list; 361 atomic_t gl_ail_count; 362 atomic_t gl_revokes; 363 struct delayed_work gl_work; 364 union { 365 /* For inode and iopen glocks only */ 366 struct work_struct gl_delete; 367 /* For rgrp glocks only */ 368 struct { 369 loff_t start; 370 loff_t end; 371 } gl_vm; 372 }; 373 struct rhash_head gl_node; 374 }; 375 376 #define GFS2_MIN_LVB_SIZE 32 /* Min size of LVB that gfs2 supports */ 377 378 enum { 379 GIF_INVALID = 0, 380 GIF_QD_LOCKED = 1, 381 GIF_ALLOC_FAILED = 2, 382 GIF_SW_PAGED = 3, 383 GIF_ORDERED = 4, 384 GIF_FREE_VFS_INODE = 5, 385 }; 386 387 struct gfs2_inode { 388 struct inode i_inode; 389 u64 i_no_addr; 390 u64 i_no_formal_ino; 391 u64 i_generation; 392 u64 i_eattr; 393 unsigned long i_flags; /* GIF_... */ 394 struct gfs2_glock *i_gl; /* Move into i_gh? */ 395 struct gfs2_holder i_iopen_gh; 396 struct gfs2_holder i_gh; /* for prepare/commit_write only */ 397 struct gfs2_qadata *i_qadata; /* quota allocation data */ 398 struct gfs2_blkreserv i_res; /* rgrp multi-block reservation */ 399 struct gfs2_rgrpd *i_rgd; 400 u64 i_goal; /* goal block for allocations */ 401 struct rw_semaphore i_rw_mutex; 402 struct list_head i_ordered; 403 struct list_head i_trunc_list; 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_count; 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 struct gfs2_trans { 474 unsigned long tr_ip; 475 476 unsigned int tr_blocks; 477 unsigned int tr_revokes; 478 unsigned int tr_reserved; 479 unsigned int tr_touched:1; 480 unsigned int tr_attached:1; 481 unsigned int tr_alloced:1; 482 483 unsigned int tr_num_buf_new; 484 unsigned int tr_num_databuf_new; 485 unsigned int tr_num_buf_rm; 486 unsigned int tr_num_databuf_rm; 487 unsigned int tr_num_revoke; 488 unsigned int tr_num_revoke_rm; 489 490 struct list_head tr_list; 491 struct list_head tr_databuf; 492 struct list_head tr_buf; 493 494 unsigned int tr_first; 495 struct list_head tr_ail1_list; 496 struct list_head tr_ail2_list; 497 }; 498 499 struct gfs2_journal_extent { 500 struct list_head list; 501 502 unsigned int lblock; /* First logical block */ 503 u64 dblock; /* First disk block */ 504 u64 blocks; 505 }; 506 507 struct gfs2_jdesc { 508 struct list_head jd_list; 509 struct list_head extent_list; 510 unsigned int nr_extents; 511 struct work_struct jd_work; 512 struct inode *jd_inode; 513 unsigned long jd_flags; 514 #define JDF_RECOVERY 1 515 unsigned int jd_jid; 516 unsigned int jd_blocks; 517 int jd_recover_error; 518 /* Replay stuff */ 519 520 unsigned int jd_found_blocks; 521 unsigned int jd_found_revokes; 522 unsigned int jd_replayed_blocks; 523 524 struct list_head jd_revoke_list; 525 unsigned int jd_replay_tail; 526 527 }; 528 529 struct gfs2_statfs_change_host { 530 s64 sc_total; 531 s64 sc_free; 532 s64 sc_dinodes; 533 }; 534 535 #define GFS2_QUOTA_DEFAULT GFS2_QUOTA_OFF 536 #define GFS2_QUOTA_OFF 0 537 #define GFS2_QUOTA_ACCOUNT 1 538 #define GFS2_QUOTA_ON 2 539 540 #define GFS2_DATA_DEFAULT GFS2_DATA_ORDERED 541 #define GFS2_DATA_WRITEBACK 1 542 #define GFS2_DATA_ORDERED 2 543 544 #define GFS2_ERRORS_DEFAULT GFS2_ERRORS_WITHDRAW 545 #define GFS2_ERRORS_WITHDRAW 0 546 #define GFS2_ERRORS_CONTINUE 1 /* place holder for future feature */ 547 #define GFS2_ERRORS_RO 2 /* place holder for future feature */ 548 #define GFS2_ERRORS_PANIC 3 549 550 struct gfs2_args { 551 char ar_lockproto[GFS2_LOCKNAME_LEN]; /* Name of the Lock Protocol */ 552 char ar_locktable[GFS2_LOCKNAME_LEN]; /* Name of the Lock Table */ 553 char ar_hostdata[GFS2_LOCKNAME_LEN]; /* Host specific data */ 554 unsigned int ar_spectator:1; /* Don't get a journal */ 555 unsigned int ar_localflocks:1; /* Let the VFS do flock|fcntl */ 556 unsigned int ar_debug:1; /* Oops on errors */ 557 unsigned int ar_posix_acl:1; /* Enable posix acls */ 558 unsigned int ar_quota:2; /* off/account/on */ 559 unsigned int ar_suiddir:1; /* suiddir support */ 560 unsigned int ar_data:2; /* ordered/writeback */ 561 unsigned int ar_meta:1; /* mount metafs */ 562 unsigned int ar_discard:1; /* discard requests */ 563 unsigned int ar_errors:2; /* errors=withdraw | panic */ 564 unsigned int ar_nobarrier:1; /* do not send barriers */ 565 unsigned int ar_rgrplvb:1; /* use lvbs for rgrp info */ 566 unsigned int ar_loccookie:1; /* use location based readdir 567 cookies */ 568 int ar_commit; /* Commit interval */ 569 int ar_statfs_quantum; /* The fast statfs interval */ 570 int ar_quota_quantum; /* The quota interval */ 571 int ar_statfs_percent; /* The % change to force sync */ 572 }; 573 574 struct gfs2_tune { 575 spinlock_t gt_spin; 576 577 unsigned int gt_logd_secs; 578 579 unsigned int gt_quota_warn_period; /* Secs between quota warn msgs */ 580 unsigned int gt_quota_scale_num; /* Numerator */ 581 unsigned int gt_quota_scale_den; /* Denominator */ 582 unsigned int gt_quota_quantum; /* Secs between syncs to quota file */ 583 unsigned int gt_new_files_jdata; 584 unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */ 585 unsigned int gt_complain_secs; 586 unsigned int gt_statfs_quantum; 587 unsigned int gt_statfs_slow; 588 }; 589 590 enum { 591 SDF_JOURNAL_CHECKED = 0, 592 SDF_JOURNAL_LIVE = 1, 593 SDF_SHUTDOWN = 2, 594 SDF_NOBARRIERS = 3, 595 SDF_NORECOVERY = 4, 596 SDF_DEMOTE = 5, 597 SDF_NOJOURNALID = 6, 598 SDF_RORECOVERY = 7, /* read only recovery */ 599 SDF_SKIP_DLM_UNLOCK = 8, 600 }; 601 602 enum gfs2_freeze_state { 603 SFS_UNFROZEN = 0, 604 SFS_STARTING_FREEZE = 1, 605 SFS_FROZEN = 2, 606 }; 607 608 #define GFS2_FSNAME_LEN 256 609 610 struct gfs2_inum_host { 611 u64 no_formal_ino; 612 u64 no_addr; 613 }; 614 615 struct gfs2_sb_host { 616 u32 sb_magic; 617 u32 sb_type; 618 u32 sb_format; 619 620 u32 sb_fs_format; 621 u32 sb_multihost_format; 622 u32 sb_bsize; 623 u32 sb_bsize_shift; 624 625 struct gfs2_inum_host sb_master_dir; 626 struct gfs2_inum_host sb_root_dir; 627 628 char sb_lockproto[GFS2_LOCKNAME_LEN]; 629 char sb_locktable[GFS2_LOCKNAME_LEN]; 630 }; 631 632 /* 633 * lm_mount() return values 634 * 635 * ls_jid - the journal ID this node should use 636 * ls_first - this node is the first to mount the file system 637 * ls_lockspace - lock module's context for this file system 638 * ls_ops - lock module's functions 639 */ 640 641 struct lm_lockstruct { 642 int ls_jid; 643 unsigned int ls_first; 644 const struct lm_lockops *ls_ops; 645 dlm_lockspace_t *ls_dlm; 646 647 int ls_recover_jid_done; /* These two are deprecated, */ 648 int ls_recover_jid_status; /* used previously by gfs_controld */ 649 650 struct dlm_lksb ls_mounted_lksb; /* mounted_lock */ 651 struct dlm_lksb ls_control_lksb; /* control_lock */ 652 char ls_control_lvb[GDLM_LVB_SIZE]; /* control_lock lvb */ 653 struct completion ls_sync_wait; /* {control,mounted}_{lock,unlock} */ 654 char *ls_lvb_bits; 655 656 spinlock_t ls_recover_spin; /* protects following fields */ 657 unsigned long ls_recover_flags; /* DFL_ */ 658 uint32_t ls_recover_mount; /* gen in first recover_done cb */ 659 uint32_t ls_recover_start; /* gen in last recover_done cb */ 660 uint32_t ls_recover_block; /* copy recover_start in last recover_prep */ 661 uint32_t ls_recover_size; /* size of recover_submit, recover_result */ 662 uint32_t *ls_recover_submit; /* gen in last recover_slot cb per jid */ 663 uint32_t *ls_recover_result; /* result of last jid recovery */ 664 }; 665 666 struct gfs2_pcpu_lkstats { 667 /* One struct for each glock type */ 668 struct gfs2_lkstats lkstats[10]; 669 }; 670 671 struct gfs2_sbd { 672 struct super_block *sd_vfs; 673 struct gfs2_pcpu_lkstats __percpu *sd_lkstats; 674 struct kobject sd_kobj; 675 unsigned long sd_flags; /* SDF_... */ 676 struct gfs2_sb_host sd_sb; 677 678 /* Constants computed on mount */ 679 680 u32 sd_fsb2bb; 681 u32 sd_fsb2bb_shift; 682 u32 sd_diptrs; /* Number of pointers in a dinode */ 683 u32 sd_inptrs; /* Number of pointers in a indirect block */ 684 u32 sd_jbsize; /* Size of a journaled data block */ 685 u32 sd_hash_bsize; /* sizeof(exhash block) */ 686 u32 sd_hash_bsize_shift; 687 u32 sd_hash_ptrs; /* Number of pointers in a hash block */ 688 u32 sd_qc_per_block; 689 u32 sd_blocks_per_bitmap; 690 u32 sd_max_dirres; /* Max blocks needed to add a directory entry */ 691 u32 sd_max_height; /* Max height of a file's metadata tree */ 692 u64 sd_heightsize[GFS2_MAX_META_HEIGHT + 1]; 693 u32 sd_max_jheight; /* Max height of journaled file's meta tree */ 694 u64 sd_jheightsize[GFS2_MAX_META_HEIGHT + 1]; 695 u32 sd_max_dents_per_leaf; /* Max number of dirents in a leaf block */ 696 697 struct gfs2_args sd_args; /* Mount arguments */ 698 struct gfs2_tune sd_tune; /* Filesystem tuning structure */ 699 700 /* Lock Stuff */ 701 702 struct lm_lockstruct sd_lockstruct; 703 struct gfs2_holder sd_live_gh; 704 struct gfs2_glock *sd_rename_gl; 705 struct gfs2_glock *sd_freeze_gl; 706 struct work_struct sd_freeze_work; 707 wait_queue_head_t sd_glock_wait; 708 atomic_t sd_glock_disposal; 709 struct completion sd_locking_init; 710 struct completion sd_wdack; 711 struct delayed_work sd_control_work; 712 713 /* Inode Stuff */ 714 715 struct dentry *sd_master_dir; 716 struct dentry *sd_root_dir; 717 718 struct inode *sd_jindex; 719 struct inode *sd_statfs_inode; 720 struct inode *sd_sc_inode; 721 struct inode *sd_qc_inode; 722 struct inode *sd_rindex; 723 struct inode *sd_quota_inode; 724 725 /* StatFS stuff */ 726 727 spinlock_t sd_statfs_spin; 728 struct gfs2_statfs_change_host sd_statfs_master; 729 struct gfs2_statfs_change_host sd_statfs_local; 730 int sd_statfs_force_sync; 731 732 /* Resource group stuff */ 733 734 int sd_rindex_uptodate; 735 spinlock_t sd_rindex_spin; 736 struct rb_root sd_rindex_tree; 737 unsigned int sd_rgrps; 738 unsigned int sd_max_rg_data; 739 740 /* Journal index stuff */ 741 742 struct list_head sd_jindex_list; 743 spinlock_t sd_jindex_spin; 744 struct mutex sd_jindex_mutex; 745 unsigned int sd_journals; 746 747 struct gfs2_jdesc *sd_jdesc; 748 struct gfs2_holder sd_journal_gh; 749 struct gfs2_holder sd_jinode_gh; 750 751 struct gfs2_holder sd_sc_gh; 752 struct gfs2_holder sd_qc_gh; 753 754 struct completion sd_journal_ready; 755 756 /* Daemon stuff */ 757 758 struct task_struct *sd_logd_process; 759 struct task_struct *sd_quotad_process; 760 761 /* Quota stuff */ 762 763 struct list_head sd_quota_list; 764 atomic_t sd_quota_count; 765 struct mutex sd_quota_mutex; 766 struct mutex sd_quota_sync_mutex; 767 wait_queue_head_t sd_quota_wait; 768 struct list_head sd_trunc_list; 769 spinlock_t sd_trunc_lock; 770 771 unsigned int sd_quota_slots; 772 unsigned long *sd_quota_bitmap; 773 spinlock_t sd_bitmap_lock; 774 775 u64 sd_quota_sync_gen; 776 777 /* Log stuff */ 778 779 struct address_space sd_aspace; 780 781 spinlock_t sd_log_lock; 782 783 struct gfs2_trans *sd_log_tr; 784 unsigned int sd_log_blks_reserved; 785 int sd_log_commited_revoke; 786 787 atomic_t sd_log_pinned; 788 unsigned int sd_log_num_revoke; 789 790 struct list_head sd_log_le_revoke; 791 struct list_head sd_log_le_ordered; 792 spinlock_t sd_ordered_lock; 793 794 atomic_t sd_log_thresh1; 795 atomic_t sd_log_thresh2; 796 atomic_t sd_log_blks_free; 797 wait_queue_head_t sd_log_waitq; 798 wait_queue_head_t sd_logd_waitq; 799 800 u64 sd_log_sequence; 801 unsigned int sd_log_head; 802 unsigned int sd_log_tail; 803 int sd_log_idle; 804 805 struct rw_semaphore sd_log_flush_lock; 806 atomic_t sd_log_in_flight; 807 struct bio *sd_log_bio; 808 wait_queue_head_t sd_log_flush_wait; 809 int sd_log_error; 810 811 atomic_t sd_reserving_log; 812 wait_queue_head_t sd_reserving_log_wait; 813 814 unsigned int sd_log_flush_head; 815 u64 sd_log_flush_wrapped; 816 817 spinlock_t sd_ail_lock; 818 struct list_head sd_ail1_list; 819 struct list_head sd_ail2_list; 820 821 /* For quiescing the filesystem */ 822 struct gfs2_holder sd_freeze_gh; 823 atomic_t sd_freeze_state; 824 struct mutex sd_freeze_mutex; 825 826 char sd_fsname[GFS2_FSNAME_LEN]; 827 char sd_table_name[GFS2_FSNAME_LEN]; 828 char sd_proto_name[GFS2_FSNAME_LEN]; 829 830 /* Debugging crud */ 831 832 unsigned long sd_last_warning; 833 struct dentry *debugfs_dir; /* debugfs directory */ 834 struct dentry *debugfs_dentry_glocks; 835 struct dentry *debugfs_dentry_glstats; 836 struct dentry *debugfs_dentry_sbstats; 837 }; 838 839 static inline void gfs2_glstats_inc(struct gfs2_glock *gl, int which) 840 { 841 gl->gl_stats.stats[which]++; 842 } 843 844 static inline void gfs2_sbstats_inc(const struct gfs2_glock *gl, int which) 845 { 846 const struct gfs2_sbd *sdp = gl->gl_name.ln_sbd; 847 preempt_disable(); 848 this_cpu_ptr(sdp->sd_lkstats)->lkstats[gl->gl_name.ln_type].stats[which]++; 849 preempt_enable(); 850 } 851 852 #endif /* __INCORE_DOT_H__ */ 853 854