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 }; 48 49 /* 50 * Structure of operations that are associated with each 51 * type of element in the log. 52 */ 53 54 struct gfs2_log_operations { 55 void (*lo_before_commit) (struct gfs2_sbd *sdp, struct gfs2_trans *tr); 56 void (*lo_after_commit) (struct gfs2_sbd *sdp, struct gfs2_trans *tr); 57 void (*lo_before_scan) (struct gfs2_jdesc *jd, 58 struct gfs2_log_header_host *head, int pass); 59 int (*lo_scan_elements) (struct gfs2_jdesc *jd, unsigned int start, 60 struct gfs2_log_descriptor *ld, __be64 *ptr, 61 int pass); 62 void (*lo_after_scan) (struct gfs2_jdesc *jd, int error, int pass); 63 const char *lo_name; 64 }; 65 66 #define GBF_FULL 1 67 68 /** 69 * Clone bitmaps (bi_clone): 70 * 71 * - When a block is freed, we remember the previous state of the block in the 72 * clone bitmap, and only mark the block as free in the real bitmap. 73 * 74 * - When looking for a block to allocate, we check for a free block in the 75 * clone bitmap, and if no clone bitmap exists, in the real bitmap. 76 * 77 * - For allocating a block, we mark it as allocated in the real bitmap, and if 78 * a clone bitmap exists, also in the clone bitmap. 79 * 80 * - At the end of a log_flush, we copy the real bitmap into the clone bitmap 81 * to make the clone bitmap reflect the current allocation state. 82 * (Alternatively, we could remove the clone bitmap.) 83 * 84 * The clone bitmaps are in-core only, and is never written to disk. 85 * 86 * These steps ensure that blocks which have been freed in a transaction cannot 87 * be reallocated in that same transaction. 88 */ 89 struct gfs2_bitmap { 90 struct buffer_head *bi_bh; 91 char *bi_clone; 92 unsigned long bi_flags; 93 u32 bi_offset; 94 u32 bi_start; 95 u32 bi_bytes; 96 u32 bi_blocks; 97 }; 98 99 struct gfs2_rgrpd { 100 struct rb_node rd_node; /* Link with superblock */ 101 struct gfs2_glock *rd_gl; /* Glock for this rgrp */ 102 u64 rd_addr; /* grp block disk address */ 103 u64 rd_data0; /* first data location */ 104 u32 rd_length; /* length of rgrp header in fs blocks */ 105 u32 rd_data; /* num of data blocks in rgrp */ 106 u32 rd_bitbytes; /* number of bytes in data bitmaps */ 107 u32 rd_free; 108 u32 rd_reserved; /* number of blocks reserved */ 109 u32 rd_free_clone; 110 u32 rd_dinodes; 111 u64 rd_igeneration; 112 struct gfs2_bitmap *rd_bits; 113 struct gfs2_sbd *rd_sbd; 114 struct gfs2_rgrp_lvb *rd_rgl; 115 u32 rd_last_alloc; 116 u32 rd_flags; 117 u32 rd_extfail_pt; /* extent failure point */ 118 #define GFS2_RDF_CHECK 0x10000000 /* check for unlinked inodes */ 119 #define GFS2_RDF_UPTODATE 0x20000000 /* rg is up to date */ 120 #define GFS2_RDF_ERROR 0x40000000 /* error in rg */ 121 #define GFS2_RDF_PREFERRED 0x80000000 /* This rgrp is preferred */ 122 #define GFS2_RDF_MASK 0xf0000000 /* mask for internal flags */ 123 spinlock_t rd_rsspin; /* protects reservation related vars */ 124 struct rb_root rd_rstree; /* multi-block reservation tree */ 125 }; 126 127 struct gfs2_rbm { 128 struct gfs2_rgrpd *rgd; 129 u32 offset; /* The offset is bitmap relative */ 130 int bii; /* Bitmap index */ 131 }; 132 133 static inline struct gfs2_bitmap *rbm_bi(const struct gfs2_rbm *rbm) 134 { 135 return rbm->rgd->rd_bits + rbm->bii; 136 } 137 138 static inline u64 gfs2_rbm_to_block(const struct gfs2_rbm *rbm) 139 { 140 BUG_ON(rbm->offset >= rbm->rgd->rd_data); 141 return rbm->rgd->rd_data0 + (rbm_bi(rbm)->bi_start * GFS2_NBBY) + 142 rbm->offset; 143 } 144 145 static inline bool gfs2_rbm_eq(const struct gfs2_rbm *rbm1, 146 const struct gfs2_rbm *rbm2) 147 { 148 return (rbm1->rgd == rbm2->rgd) && (rbm1->bii == rbm2->bii) && 149 (rbm1->offset == rbm2->offset); 150 } 151 152 enum gfs2_state_bits { 153 BH_Pinned = BH_PrivateStart, 154 BH_Escaped = BH_PrivateStart + 1, 155 }; 156 157 BUFFER_FNS(Pinned, pinned) 158 TAS_BUFFER_FNS(Pinned, pinned) 159 BUFFER_FNS(Escaped, escaped) 160 TAS_BUFFER_FNS(Escaped, escaped) 161 162 struct gfs2_bufdata { 163 struct buffer_head *bd_bh; 164 struct gfs2_glock *bd_gl; 165 u64 bd_blkno; 166 167 struct list_head bd_list; 168 169 struct gfs2_trans *bd_tr; 170 struct list_head bd_ail_st_list; 171 struct list_head bd_ail_gl_list; 172 }; 173 174 /* 175 * Internally, we prefix things with gdlm_ and GDLM_ (for gfs-dlm) since a 176 * prefix of lock_dlm_ gets awkward. 177 */ 178 179 #define GDLM_STRNAME_BYTES 25 180 #define GDLM_LVB_SIZE 32 181 182 /* 183 * ls_recover_flags: 184 * 185 * DFL_BLOCK_LOCKS: dlm is in recovery and will grant locks that had been 186 * held by failed nodes whose journals need recovery. Those locks should 187 * only be used for journal recovery until the journal recovery is done. 188 * This is set by the dlm recover_prep callback and cleared by the 189 * gfs2_control thread when journal recovery is complete. To avoid 190 * races between recover_prep setting and gfs2_control clearing, recover_spin 191 * is held while changing this bit and reading/writing recover_block 192 * and recover_start. 193 * 194 * DFL_NO_DLM_OPS: dlm lockspace ops/callbacks are not being used. 195 * 196 * DFL_FIRST_MOUNT: this node is the first to mount this fs and is doing 197 * recovery of all journals before allowing other nodes to mount the fs. 198 * This is cleared when FIRST_MOUNT_DONE is set. 199 * 200 * DFL_FIRST_MOUNT_DONE: this node was the first mounter, and has finished 201 * recovery of all journals, and now allows other nodes to mount the fs. 202 * 203 * DFL_MOUNT_DONE: gdlm_mount has completed successfully and cleared 204 * BLOCK_LOCKS for the first time. The gfs2_control thread should now 205 * control clearing BLOCK_LOCKS for further recoveries. 206 * 207 * DFL_UNMOUNT: gdlm_unmount sets to keep sdp off gfs2_control_wq. 208 * 209 * DFL_DLM_RECOVERY: set while dlm is in recovery, between recover_prep() 210 * and recover_done(), i.e. set while recover_block == recover_start. 211 */ 212 213 enum { 214 DFL_BLOCK_LOCKS = 0, 215 DFL_NO_DLM_OPS = 1, 216 DFL_FIRST_MOUNT = 2, 217 DFL_FIRST_MOUNT_DONE = 3, 218 DFL_MOUNT_DONE = 4, 219 DFL_UNMOUNT = 5, 220 DFL_DLM_RECOVERY = 6, 221 }; 222 223 /* 224 * We are using struct lm_lockname as an rhashtable key. Avoid holes within 225 * the struct; padding at the end is fine. 226 */ 227 struct lm_lockname { 228 u64 ln_number; 229 struct gfs2_sbd *ln_sbd; 230 unsigned int ln_type; 231 }; 232 233 #define lm_name_equal(name1, name2) \ 234 (((name1)->ln_number == (name2)->ln_number) && \ 235 ((name1)->ln_type == (name2)->ln_type) && \ 236 ((name1)->ln_sbd == (name2)->ln_sbd)) 237 238 239 struct gfs2_glock_operations { 240 void (*go_sync) (struct gfs2_glock *gl); 241 int (*go_xmote_bh) (struct gfs2_glock *gl, struct gfs2_holder *gh); 242 void (*go_inval) (struct gfs2_glock *gl, int flags); 243 int (*go_demote_ok) (const struct gfs2_glock *gl); 244 int (*go_lock) (struct gfs2_holder *gh); 245 void (*go_unlock) (struct gfs2_holder *gh); 246 void (*go_dump)(struct seq_file *seq, struct gfs2_glock *gl); 247 void (*go_callback)(struct gfs2_glock *gl, bool remote); 248 const int go_type; 249 const unsigned long go_flags; 250 #define GLOF_ASPACE 1 251 #define GLOF_LVB 2 252 #define GLOF_LRU 4 253 }; 254 255 enum { 256 GFS2_LKS_SRTT = 0, /* Non blocking smoothed round trip time */ 257 GFS2_LKS_SRTTVAR = 1, /* Non blocking smoothed variance */ 258 GFS2_LKS_SRTTB = 2, /* Blocking smoothed round trip time */ 259 GFS2_LKS_SRTTVARB = 3, /* Blocking smoothed variance */ 260 GFS2_LKS_SIRT = 4, /* Smoothed Inter-request time */ 261 GFS2_LKS_SIRTVAR = 5, /* Smoothed Inter-request variance */ 262 GFS2_LKS_DCOUNT = 6, /* Count of dlm requests */ 263 GFS2_LKS_QCOUNT = 7, /* Count of gfs2_holder queues */ 264 GFS2_NR_LKSTATS 265 }; 266 267 struct gfs2_lkstats { 268 u64 stats[GFS2_NR_LKSTATS]; 269 }; 270 271 enum { 272 /* States */ 273 HIF_HOLDER = 6, /* Set for gh that "holds" the glock */ 274 HIF_FIRST = 7, 275 HIF_WAIT = 10, 276 }; 277 278 struct gfs2_holder { 279 struct list_head gh_list; 280 281 struct gfs2_glock *gh_gl; 282 struct pid *gh_owner_pid; 283 u16 gh_flags; 284 u16 gh_state; 285 286 int gh_error; 287 unsigned long gh_iflags; /* HIF_... */ 288 unsigned long gh_ip; 289 }; 290 291 /* Number of quota types we support */ 292 #define GFS2_MAXQUOTAS 2 293 294 struct gfs2_qadata { /* quota allocation data */ 295 /* Quota stuff */ 296 struct gfs2_quota_data *qa_qd[2 * GFS2_MAXQUOTAS]; 297 struct gfs2_holder qa_qd_ghs[2 * GFS2_MAXQUOTAS]; 298 unsigned int qa_qd_num; 299 }; 300 301 /* Resource group multi-block reservation, in order of appearance: 302 303 Step 1. Function prepares to write, allocates a mb, sets the size hint. 304 Step 2. User calls inplace_reserve to target an rgrp, sets the rgrp info 305 Step 3. Function get_local_rgrp locks the rgrp, determines which bits to use 306 Step 4. Bits are assigned from the rgrp based on either the reservation 307 or wherever it can. 308 */ 309 310 struct gfs2_blkreserv { 311 struct rb_node rs_node; /* link to other block reservations */ 312 struct gfs2_rbm rs_rbm; /* Start of reservation */ 313 u32 rs_free; /* how many blocks are still free */ 314 }; 315 316 /* 317 * Allocation parameters 318 * @target: The number of blocks we'd ideally like to allocate 319 * @aflags: The flags (e.g. Orlov flag) 320 * 321 * The intent is to gradually expand this structure over time in 322 * order to give more information, e.g. alignment, min extent size 323 * to the allocation code. 324 */ 325 struct gfs2_alloc_parms { 326 u64 target; 327 u32 min_target; 328 u32 aflags; 329 u64 allowed; 330 }; 331 332 enum { 333 GLF_LOCK = 1, 334 GLF_DEMOTE = 3, 335 GLF_PENDING_DEMOTE = 4, 336 GLF_DEMOTE_IN_PROGRESS = 5, 337 GLF_DIRTY = 6, 338 GLF_LFLUSH = 7, 339 GLF_INVALIDATE_IN_PROGRESS = 8, 340 GLF_REPLY_PENDING = 9, 341 GLF_INITIAL = 10, 342 GLF_FROZEN = 11, 343 GLF_QUEUED = 12, 344 GLF_LRU = 13, 345 GLF_OBJECT = 14, /* Used only for tracing */ 346 GLF_BLOCKING = 15, 347 GLF_INODE_CREATING = 16, /* Inode creation occurring */ 348 GLF_REVOKES = 17, /* Glock has revokes in queue */ 349 }; 350 351 struct gfs2_glock { 352 unsigned long gl_flags; /* GLF_... */ 353 struct lm_lockname gl_name; 354 355 struct lockref gl_lockref; 356 357 /* State fields protected by gl_lockref.lock */ 358 unsigned int gl_state:2, /* Current state */ 359 gl_target:2, /* Target state */ 360 gl_demote_state:2, /* State requested by remote node */ 361 gl_req:2, /* State in last dlm request */ 362 gl_reply:8; /* Last reply from the dlm */ 363 364 unsigned long gl_demote_time; /* time of first demote request */ 365 long gl_hold_time; 366 struct list_head gl_holders; 367 368 const struct gfs2_glock_operations *gl_ops; 369 ktime_t gl_dstamp; 370 struct gfs2_lkstats gl_stats; 371 struct dlm_lksb gl_lksb; 372 unsigned long gl_tchange; 373 void *gl_object; 374 375 struct list_head gl_lru; 376 struct list_head gl_ail_list; 377 atomic_t gl_ail_count; 378 struct delayed_work gl_work; 379 union { 380 /* For inode and iopen glocks only */ 381 struct work_struct gl_delete; 382 /* For rgrp glocks only */ 383 struct { 384 loff_t start; 385 loff_t end; 386 } gl_vm; 387 }; 388 struct rcu_head gl_rcu; 389 struct rhash_head gl_node; 390 }; 391 392 #define GFS2_MIN_LVB_SIZE 32 /* Min size of LVB that gfs2 supports */ 393 394 enum { 395 GIF_INVALID = 0, 396 GIF_QD_LOCKED = 1, 397 GIF_ALLOC_FAILED = 2, 398 GIF_SW_PAGED = 3, 399 GIF_ORDERED = 4, 400 GIF_FREE_VFS_INODE = 5, 401 GIF_GLOP_PENDING = 6, 402 }; 403 404 struct gfs2_inode { 405 struct inode i_inode; 406 u64 i_no_addr; 407 u64 i_no_formal_ino; 408 u64 i_generation; 409 u64 i_eattr; 410 unsigned long i_flags; /* GIF_... */ 411 struct gfs2_glock *i_gl; /* Move into i_gh? */ 412 struct gfs2_holder i_iopen_gh; 413 struct gfs2_holder i_gh; /* for prepare/commit_write only */ 414 struct gfs2_qadata *i_qadata; /* quota allocation data */ 415 struct gfs2_holder i_rgd_gh; 416 struct gfs2_blkreserv i_res; /* rgrp multi-block reservation */ 417 u64 i_goal; /* goal block for allocations */ 418 atomic_t i_sizehint; /* hint of the write size */ 419 struct rw_semaphore i_rw_mutex; 420 struct list_head i_ordered; 421 struct list_head i_trunc_list; 422 __be64 *i_hash_cache; 423 u32 i_entries; 424 u32 i_diskflags; 425 u8 i_height; 426 u8 i_depth; 427 u16 i_rahead; 428 }; 429 430 /* 431 * Since i_inode is the first element of struct gfs2_inode, 432 * this is effectively a cast. 433 */ 434 static inline struct gfs2_inode *GFS2_I(struct inode *inode) 435 { 436 return container_of(inode, struct gfs2_inode, i_inode); 437 } 438 439 static inline struct gfs2_sbd *GFS2_SB(const struct inode *inode) 440 { 441 return inode->i_sb->s_fs_info; 442 } 443 444 struct gfs2_file { 445 struct mutex f_fl_mutex; 446 struct gfs2_holder f_fl_gh; 447 }; 448 449 struct gfs2_revoke_replay { 450 struct list_head rr_list; 451 u64 rr_blkno; 452 unsigned int rr_where; 453 }; 454 455 enum { 456 QDF_CHANGE = 1, 457 QDF_LOCKED = 2, 458 QDF_REFRESH = 3, 459 QDF_QMSG_QUIET = 4, 460 }; 461 462 struct gfs2_quota_data { 463 struct hlist_bl_node qd_hlist; 464 struct list_head qd_list; 465 struct kqid qd_id; 466 struct gfs2_sbd *qd_sbd; 467 struct lockref qd_lockref; 468 struct list_head qd_lru; 469 unsigned qd_hash; 470 471 unsigned long qd_flags; /* QDF_... */ 472 473 s64 qd_change; 474 s64 qd_change_sync; 475 476 unsigned int qd_slot; 477 unsigned int qd_slot_count; 478 479 struct buffer_head *qd_bh; 480 struct gfs2_quota_change *qd_bh_qc; 481 unsigned int qd_bh_count; 482 483 struct gfs2_glock *qd_gl; 484 struct gfs2_quota_lvb qd_qb; 485 486 u64 qd_sync_gen; 487 unsigned long qd_last_warn; 488 struct rcu_head qd_rcu; 489 }; 490 491 enum { 492 TR_TOUCHED = 1, 493 TR_ATTACHED = 2, 494 TR_ALLOCED = 3, 495 }; 496 497 struct gfs2_trans { 498 unsigned long tr_ip; 499 500 unsigned int tr_blocks; 501 unsigned int tr_revokes; 502 unsigned int tr_reserved; 503 unsigned long tr_flags; 504 505 unsigned int tr_num_buf_new; 506 unsigned int tr_num_databuf_new; 507 unsigned int tr_num_buf_rm; 508 unsigned int tr_num_databuf_rm; 509 unsigned int tr_num_revoke; 510 unsigned int tr_num_revoke_rm; 511 512 struct list_head tr_list; 513 struct list_head tr_databuf; 514 struct list_head tr_buf; 515 516 unsigned int tr_first; 517 struct list_head tr_ail1_list; 518 struct list_head tr_ail2_list; 519 }; 520 521 struct gfs2_journal_extent { 522 struct list_head list; 523 524 unsigned int lblock; /* First logical block */ 525 u64 dblock; /* First disk block */ 526 u64 blocks; 527 }; 528 529 struct gfs2_jdesc { 530 struct list_head jd_list; 531 struct list_head extent_list; 532 unsigned int nr_extents; 533 struct work_struct jd_work; 534 struct inode *jd_inode; 535 unsigned long jd_flags; 536 #define JDF_RECOVERY 1 537 unsigned int jd_jid; 538 u32 jd_blocks; 539 int jd_recover_error; 540 /* Replay stuff */ 541 542 unsigned int jd_found_blocks; 543 unsigned int jd_found_revokes; 544 unsigned int jd_replayed_blocks; 545 546 struct list_head jd_revoke_list; 547 unsigned int jd_replay_tail; 548 549 }; 550 551 struct gfs2_statfs_change_host { 552 s64 sc_total; 553 s64 sc_free; 554 s64 sc_dinodes; 555 }; 556 557 #define GFS2_QUOTA_DEFAULT GFS2_QUOTA_OFF 558 #define GFS2_QUOTA_OFF 0 559 #define GFS2_QUOTA_ACCOUNT 1 560 #define GFS2_QUOTA_ON 2 561 562 #define GFS2_DATA_DEFAULT GFS2_DATA_ORDERED 563 #define GFS2_DATA_WRITEBACK 1 564 #define GFS2_DATA_ORDERED 2 565 566 #define GFS2_ERRORS_DEFAULT GFS2_ERRORS_WITHDRAW 567 #define GFS2_ERRORS_WITHDRAW 0 568 #define GFS2_ERRORS_CONTINUE 1 /* place holder for future feature */ 569 #define GFS2_ERRORS_RO 2 /* place holder for future feature */ 570 #define GFS2_ERRORS_PANIC 3 571 572 struct gfs2_args { 573 char ar_lockproto[GFS2_LOCKNAME_LEN]; /* Name of the Lock Protocol */ 574 char ar_locktable[GFS2_LOCKNAME_LEN]; /* Name of the Lock Table */ 575 char ar_hostdata[GFS2_LOCKNAME_LEN]; /* Host specific data */ 576 unsigned int ar_spectator:1; /* Don't get a journal */ 577 unsigned int ar_localflocks:1; /* Let the VFS do flock|fcntl */ 578 unsigned int ar_debug:1; /* Oops on errors */ 579 unsigned int ar_posix_acl:1; /* Enable posix acls */ 580 unsigned int ar_quota:2; /* off/account/on */ 581 unsigned int ar_suiddir:1; /* suiddir support */ 582 unsigned int ar_data:2; /* ordered/writeback */ 583 unsigned int ar_meta:1; /* mount metafs */ 584 unsigned int ar_discard:1; /* discard requests */ 585 unsigned int ar_errors:2; /* errors=withdraw | panic */ 586 unsigned int ar_nobarrier:1; /* do not send barriers */ 587 unsigned int ar_rgrplvb:1; /* use lvbs for rgrp info */ 588 unsigned int ar_loccookie:1; /* use location based readdir 589 cookies */ 590 int ar_commit; /* Commit interval */ 591 int ar_statfs_quantum; /* The fast statfs interval */ 592 int ar_quota_quantum; /* The quota interval */ 593 int ar_statfs_percent; /* The % change to force sync */ 594 }; 595 596 struct gfs2_tune { 597 spinlock_t gt_spin; 598 599 unsigned int gt_logd_secs; 600 601 unsigned int gt_quota_warn_period; /* Secs between quota warn msgs */ 602 unsigned int gt_quota_scale_num; /* Numerator */ 603 unsigned int gt_quota_scale_den; /* Denominator */ 604 unsigned int gt_quota_quantum; /* Secs between syncs to quota file */ 605 unsigned int gt_new_files_jdata; 606 unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */ 607 unsigned int gt_complain_secs; 608 unsigned int gt_statfs_quantum; 609 unsigned int gt_statfs_slow; 610 }; 611 612 enum { 613 SDF_JOURNAL_CHECKED = 0, 614 SDF_JOURNAL_LIVE = 1, 615 SDF_SHUTDOWN = 2, 616 SDF_NOBARRIERS = 3, 617 SDF_NORECOVERY = 4, 618 SDF_DEMOTE = 5, 619 SDF_NOJOURNALID = 6, 620 SDF_RORECOVERY = 7, /* read only recovery */ 621 SDF_SKIP_DLM_UNLOCK = 8, 622 SDF_FORCE_AIL_FLUSH = 9, 623 SDF_AIL1_IO_ERROR = 10, 624 SDF_FS_FROZEN = 11, 625 }; 626 627 enum gfs2_freeze_state { 628 SFS_UNFROZEN = 0, 629 SFS_STARTING_FREEZE = 1, 630 SFS_FROZEN = 2, 631 }; 632 633 #define GFS2_FSNAME_LEN 256 634 635 struct gfs2_inum_host { 636 u64 no_formal_ino; 637 u64 no_addr; 638 }; 639 640 struct gfs2_sb_host { 641 u32 sb_magic; 642 u32 sb_type; 643 u32 sb_format; 644 645 u32 sb_fs_format; 646 u32 sb_multihost_format; 647 u32 sb_bsize; 648 u32 sb_bsize_shift; 649 650 struct gfs2_inum_host sb_master_dir; 651 struct gfs2_inum_host sb_root_dir; 652 653 char sb_lockproto[GFS2_LOCKNAME_LEN]; 654 char sb_locktable[GFS2_LOCKNAME_LEN]; 655 }; 656 657 /* 658 * lm_mount() return values 659 * 660 * ls_jid - the journal ID this node should use 661 * ls_first - this node is the first to mount the file system 662 * ls_lockspace - lock module's context for this file system 663 * ls_ops - lock module's functions 664 */ 665 666 struct lm_lockstruct { 667 int ls_jid; 668 unsigned int ls_first; 669 const struct lm_lockops *ls_ops; 670 dlm_lockspace_t *ls_dlm; 671 672 int ls_recover_jid_done; /* These two are deprecated, */ 673 int ls_recover_jid_status; /* used previously by gfs_controld */ 674 675 struct dlm_lksb ls_mounted_lksb; /* mounted_lock */ 676 struct dlm_lksb ls_control_lksb; /* control_lock */ 677 char ls_control_lvb[GDLM_LVB_SIZE]; /* control_lock lvb */ 678 struct completion ls_sync_wait; /* {control,mounted}_{lock,unlock} */ 679 char *ls_lvb_bits; 680 681 spinlock_t ls_recover_spin; /* protects following fields */ 682 unsigned long ls_recover_flags; /* DFL_ */ 683 uint32_t ls_recover_mount; /* gen in first recover_done cb */ 684 uint32_t ls_recover_start; /* gen in last recover_done cb */ 685 uint32_t ls_recover_block; /* copy recover_start in last recover_prep */ 686 uint32_t ls_recover_size; /* size of recover_submit, recover_result */ 687 uint32_t *ls_recover_submit; /* gen in last recover_slot cb per jid */ 688 uint32_t *ls_recover_result; /* result of last jid recovery */ 689 }; 690 691 struct gfs2_pcpu_lkstats { 692 /* One struct for each glock type */ 693 struct gfs2_lkstats lkstats[10]; 694 }; 695 696 struct gfs2_sbd { 697 struct super_block *sd_vfs; 698 struct gfs2_pcpu_lkstats __percpu *sd_lkstats; 699 struct kobject sd_kobj; 700 unsigned long sd_flags; /* SDF_... */ 701 struct gfs2_sb_host sd_sb; 702 703 /* Constants computed on mount */ 704 705 u32 sd_fsb2bb; 706 u32 sd_fsb2bb_shift; 707 u32 sd_diptrs; /* Number of pointers in a dinode */ 708 u32 sd_inptrs; /* Number of pointers in a indirect block */ 709 u32 sd_jbsize; /* Size of a journaled data block */ 710 u32 sd_hash_bsize; /* sizeof(exhash block) */ 711 u32 sd_hash_bsize_shift; 712 u32 sd_hash_ptrs; /* Number of pointers in a hash block */ 713 u32 sd_qc_per_block; 714 u32 sd_blocks_per_bitmap; 715 u32 sd_max_dirres; /* Max blocks needed to add a directory entry */ 716 u32 sd_max_height; /* Max height of a file's metadata tree */ 717 u64 sd_heightsize[GFS2_MAX_META_HEIGHT + 1]; 718 u32 sd_max_dents_per_leaf; /* Max number of dirents in a leaf block */ 719 720 struct gfs2_args sd_args; /* Mount arguments */ 721 struct gfs2_tune sd_tune; /* Filesystem tuning structure */ 722 723 /* Lock Stuff */ 724 725 struct lm_lockstruct sd_lockstruct; 726 struct gfs2_holder sd_live_gh; 727 struct gfs2_glock *sd_rename_gl; 728 struct gfs2_glock *sd_freeze_gl; 729 struct work_struct sd_freeze_work; 730 wait_queue_head_t sd_glock_wait; 731 atomic_t sd_glock_disposal; 732 struct completion sd_locking_init; 733 struct completion sd_wdack; 734 struct delayed_work sd_control_work; 735 736 /* Inode Stuff */ 737 738 struct dentry *sd_master_dir; 739 struct dentry *sd_root_dir; 740 741 struct inode *sd_jindex; 742 struct inode *sd_statfs_inode; 743 struct inode *sd_sc_inode; 744 struct inode *sd_qc_inode; 745 struct inode *sd_rindex; 746 struct inode *sd_quota_inode; 747 748 /* StatFS stuff */ 749 750 spinlock_t sd_statfs_spin; 751 struct gfs2_statfs_change_host sd_statfs_master; 752 struct gfs2_statfs_change_host sd_statfs_local; 753 int sd_statfs_force_sync; 754 755 /* Resource group stuff */ 756 757 int sd_rindex_uptodate; 758 spinlock_t sd_rindex_spin; 759 struct rb_root sd_rindex_tree; 760 unsigned int sd_rgrps; 761 unsigned int sd_max_rg_data; 762 763 /* Journal index stuff */ 764 765 struct list_head sd_jindex_list; 766 spinlock_t sd_jindex_spin; 767 struct mutex sd_jindex_mutex; 768 unsigned int sd_journals; 769 770 struct gfs2_jdesc *sd_jdesc; 771 struct gfs2_holder sd_journal_gh; 772 struct gfs2_holder sd_jinode_gh; 773 774 struct gfs2_holder sd_sc_gh; 775 struct gfs2_holder sd_qc_gh; 776 777 struct completion sd_journal_ready; 778 779 /* Daemon stuff */ 780 781 struct task_struct *sd_logd_process; 782 struct task_struct *sd_quotad_process; 783 784 /* Quota stuff */ 785 786 struct list_head sd_quota_list; 787 atomic_t sd_quota_count; 788 struct mutex sd_quota_mutex; 789 struct mutex sd_quota_sync_mutex; 790 wait_queue_head_t sd_quota_wait; 791 struct list_head sd_trunc_list; 792 spinlock_t sd_trunc_lock; 793 794 unsigned int sd_quota_slots; 795 unsigned long *sd_quota_bitmap; 796 spinlock_t sd_bitmap_lock; 797 798 u64 sd_quota_sync_gen; 799 800 /* Log stuff */ 801 802 struct address_space sd_aspace; 803 804 spinlock_t sd_log_lock; 805 806 struct gfs2_trans *sd_log_tr; 807 unsigned int sd_log_blks_reserved; 808 int sd_log_commited_revoke; 809 810 atomic_t sd_log_pinned; 811 unsigned int sd_log_num_revoke; 812 813 struct list_head sd_log_revokes; 814 struct list_head sd_log_ordered; 815 spinlock_t sd_ordered_lock; 816 817 atomic_t sd_log_thresh1; 818 atomic_t sd_log_thresh2; 819 atomic_t sd_log_blks_free; 820 atomic_t sd_log_blks_needed; 821 wait_queue_head_t sd_log_waitq; 822 wait_queue_head_t sd_logd_waitq; 823 824 u64 sd_log_sequence; 825 unsigned int sd_log_head; 826 unsigned int sd_log_tail; 827 int sd_log_idle; 828 829 struct rw_semaphore sd_log_flush_lock; 830 atomic_t sd_log_in_flight; 831 struct bio *sd_log_bio; 832 wait_queue_head_t sd_log_flush_wait; 833 int sd_log_error; 834 835 atomic_t sd_reserving_log; 836 wait_queue_head_t sd_reserving_log_wait; 837 838 unsigned int sd_log_flush_head; 839 840 spinlock_t sd_ail_lock; 841 struct list_head sd_ail1_list; 842 struct list_head sd_ail2_list; 843 844 /* For quiescing the filesystem */ 845 struct gfs2_holder sd_freeze_gh; 846 atomic_t sd_freeze_state; 847 struct mutex sd_freeze_mutex; 848 849 char sd_fsname[GFS2_FSNAME_LEN + 3 * sizeof(int) + 2]; 850 char sd_table_name[GFS2_FSNAME_LEN]; 851 char sd_proto_name[GFS2_FSNAME_LEN]; 852 853 /* Debugging crud */ 854 855 unsigned long sd_last_warning; 856 struct dentry *debugfs_dir; /* debugfs directory */ 857 }; 858 859 static inline void gfs2_glstats_inc(struct gfs2_glock *gl, int which) 860 { 861 gl->gl_stats.stats[which]++; 862 } 863 864 static inline void gfs2_sbstats_inc(const struct gfs2_glock *gl, int which) 865 { 866 const struct gfs2_sbd *sdp = gl->gl_name.ln_sbd; 867 preempt_disable(); 868 this_cpu_ptr(sdp->sd_lkstats)->lkstats[gl->gl_name.ln_type].stats[which]++; 869 preempt_enable(); 870 } 871 872 extern struct gfs2_rgrpd *gfs2_glock2rgrp(struct gfs2_glock *gl); 873 874 static inline unsigned gfs2_max_stuffed_size(const struct gfs2_inode *ip) 875 { 876 return GFS2_SB(&ip->i_inode)->sd_sb.sb_bsize - sizeof(struct gfs2_dinode); 877 } 878 879 #endif /* __INCORE_DOT_H__ */ 880 881