1 /* 2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. 3 * Copyright (C) 2004-2007 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/workqueue.h> 15 16 #define DIO_WAIT 0x00000010 17 #define DIO_METADATA 0x00000020 18 #define DIO_ALL 0x00000100 19 20 struct gfs2_log_operations; 21 struct gfs2_log_element; 22 struct gfs2_holder; 23 struct gfs2_glock; 24 struct gfs2_quota_data; 25 struct gfs2_trans; 26 struct gfs2_ail; 27 struct gfs2_jdesc; 28 struct gfs2_sbd; 29 30 typedef void (*gfs2_glop_bh_t) (struct gfs2_glock *gl, unsigned int ret); 31 32 struct gfs2_log_header_host { 33 u64 lh_sequence; /* Sequence number of this transaction */ 34 u32 lh_flags; /* GFS2_LOG_HEAD_... */ 35 u32 lh_tail; /* Block number of log tail */ 36 u32 lh_blkno; 37 u32 lh_hash; 38 }; 39 40 /* 41 * Structure of operations that are associated with each 42 * type of element in the log. 43 */ 44 45 struct gfs2_log_operations { 46 void (*lo_add) (struct gfs2_sbd *sdp, struct gfs2_log_element *le); 47 void (*lo_incore_commit) (struct gfs2_sbd *sdp, struct gfs2_trans *tr); 48 void (*lo_before_commit) (struct gfs2_sbd *sdp); 49 void (*lo_after_commit) (struct gfs2_sbd *sdp, struct gfs2_ail *ai); 50 void (*lo_before_scan) (struct gfs2_jdesc *jd, 51 struct gfs2_log_header_host *head, int pass); 52 int (*lo_scan_elements) (struct gfs2_jdesc *jd, unsigned int start, 53 struct gfs2_log_descriptor *ld, __be64 *ptr, 54 int pass); 55 void (*lo_after_scan) (struct gfs2_jdesc *jd, int error, int pass); 56 const char *lo_name; 57 }; 58 59 struct gfs2_log_element { 60 struct list_head le_list; 61 const struct gfs2_log_operations *le_ops; 62 }; 63 64 struct gfs2_bitmap { 65 struct buffer_head *bi_bh; 66 char *bi_clone; 67 u32 bi_offset; 68 u32 bi_start; 69 u32 bi_len; 70 }; 71 72 struct gfs2_rgrp_host { 73 u32 rg_flags; 74 u32 rg_free; 75 u32 rg_dinodes; 76 u64 rg_igeneration; 77 }; 78 79 struct gfs2_rgrpd { 80 struct list_head rd_list; /* Link with superblock */ 81 struct list_head rd_list_mru; 82 struct list_head rd_recent; /* Recently used rgrps */ 83 struct gfs2_glock *rd_gl; /* Glock for this rgrp */ 84 u64 rd_addr; /* grp block disk address */ 85 u64 rd_data0; /* first data location */ 86 u32 rd_length; /* length of rgrp header in fs blocks */ 87 u32 rd_data; /* num of data blocks in rgrp */ 88 u32 rd_bitbytes; /* number of bytes in data bitmaps */ 89 struct gfs2_rgrp_host rd_rg; 90 u64 rd_rg_vn; 91 struct gfs2_bitmap *rd_bits; 92 unsigned int rd_bh_count; 93 struct mutex rd_mutex; 94 u32 rd_free_clone; 95 struct gfs2_log_element rd_le; 96 u32 rd_last_alloc_data; 97 u32 rd_last_alloc_meta; 98 struct gfs2_sbd *rd_sbd; 99 unsigned long rd_flags; 100 #define GFS2_RDF_CHECK 0x0001 /* Need to check for unlinked inodes */ 101 }; 102 103 enum gfs2_state_bits { 104 BH_Pinned = BH_PrivateStart, 105 BH_Escaped = BH_PrivateStart + 1, 106 }; 107 108 BUFFER_FNS(Pinned, pinned) 109 TAS_BUFFER_FNS(Pinned, pinned) 110 BUFFER_FNS(Escaped, escaped) 111 TAS_BUFFER_FNS(Escaped, escaped) 112 113 struct gfs2_bufdata { 114 struct buffer_head *bd_bh; 115 struct gfs2_glock *bd_gl; 116 117 union { 118 struct list_head list_tr; 119 u64 blkno; 120 } u; 121 #define bd_list_tr u.list_tr 122 #define bd_blkno u.blkno 123 124 struct gfs2_log_element bd_le; 125 126 struct gfs2_ail *bd_ail; 127 struct list_head bd_ail_st_list; 128 struct list_head bd_ail_gl_list; 129 }; 130 131 struct gfs2_glock_operations { 132 void (*go_xmote_th) (struct gfs2_glock *gl); 133 void (*go_xmote_bh) (struct gfs2_glock *gl); 134 void (*go_inval) (struct gfs2_glock *gl, int flags); 135 int (*go_demote_ok) (struct gfs2_glock *gl); 136 int (*go_lock) (struct gfs2_holder *gh); 137 void (*go_unlock) (struct gfs2_holder *gh); 138 const int go_type; 139 const unsigned long go_min_hold_time; 140 }; 141 142 enum { 143 /* States */ 144 HIF_HOLDER = 6, 145 HIF_FIRST = 7, 146 HIF_ABORTED = 9, 147 HIF_WAIT = 10, 148 }; 149 150 struct gfs2_holder { 151 struct list_head gh_list; 152 153 struct gfs2_glock *gh_gl; 154 pid_t gh_owner_pid; 155 unsigned int gh_state; 156 unsigned gh_flags; 157 158 int gh_error; 159 unsigned long gh_iflags; 160 unsigned long gh_ip; 161 }; 162 163 enum { 164 GLF_LOCK = 1, 165 GLF_STICKY = 2, 166 GLF_DEMOTE = 3, 167 GLF_PENDING_DEMOTE = 4, 168 GLF_DIRTY = 5, 169 GLF_DEMOTE_IN_PROGRESS = 6, 170 GLF_LFLUSH = 7, 171 }; 172 173 struct gfs2_glock { 174 struct hlist_node gl_list; 175 unsigned long gl_flags; /* GLF_... */ 176 struct lm_lockname gl_name; 177 atomic_t gl_ref; 178 179 spinlock_t gl_spin; 180 181 unsigned int gl_state; 182 unsigned int gl_hash; 183 unsigned int gl_demote_state; /* state requested by remote node */ 184 unsigned long gl_demote_time; /* time of first demote request */ 185 pid_t gl_owner_pid; 186 unsigned long gl_ip; 187 struct list_head gl_holders; 188 struct list_head gl_waiters1; /* HIF_MUTEX */ 189 struct list_head gl_waiters3; /* HIF_PROMOTE */ 190 int gl_waiters2; /* GIF_DEMOTE */ 191 192 const struct gfs2_glock_operations *gl_ops; 193 194 struct gfs2_holder *gl_req_gh; 195 gfs2_glop_bh_t gl_req_bh; 196 197 void *gl_lock; 198 char *gl_lvb; 199 atomic_t gl_lvb_count; 200 201 u64 gl_vn; 202 unsigned long gl_stamp; 203 unsigned long gl_tchange; 204 void *gl_object; 205 206 struct list_head gl_reclaim; 207 208 struct gfs2_sbd *gl_sbd; 209 210 struct inode *gl_aspace; 211 struct list_head gl_ail_list; 212 atomic_t gl_ail_count; 213 struct delayed_work gl_work; 214 }; 215 216 struct gfs2_alloc { 217 /* Quota stuff */ 218 219 struct gfs2_quota_data *al_qd[2*MAXQUOTAS]; 220 struct gfs2_holder al_qd_ghs[2*MAXQUOTAS]; 221 unsigned int al_qd_num; 222 223 u32 al_requested; /* Filled in by caller of gfs2_inplace_reserve() */ 224 u32 al_alloced; /* Filled in by gfs2_alloc_*() */ 225 226 /* Filled in by gfs2_inplace_reserve() */ 227 228 unsigned int al_line; 229 char *al_file; 230 struct gfs2_holder al_ri_gh; 231 struct gfs2_holder al_rgd_gh; 232 struct gfs2_rgrpd *al_rgd; 233 234 }; 235 236 enum { 237 GIF_INVALID = 0, 238 GIF_QD_LOCKED = 1, 239 GIF_SW_PAGED = 3, 240 }; 241 242 struct gfs2_dinode_host { 243 u64 di_size; /* number of bytes in file */ 244 u64 di_blocks; /* number of blocks in file */ 245 u64 di_goal_meta; /* rgrp to alloc from next */ 246 u64 di_goal_data; /* data block goal */ 247 u64 di_generation; /* generation number for NFS */ 248 u32 di_flags; /* GFS2_DIF_... */ 249 u16 di_height; /* height of metadata */ 250 /* These only apply to directories */ 251 u16 di_depth; /* Number of bits in the table */ 252 u32 di_entries; /* The number of entries in the directory */ 253 u64 di_eattr; /* extended attribute block number */ 254 }; 255 256 struct gfs2_inode { 257 struct inode i_inode; 258 u64 i_no_addr; 259 u64 i_no_formal_ino; 260 unsigned long i_flags; /* GIF_... */ 261 262 struct gfs2_dinode_host i_di; /* To be replaced by ref to block */ 263 264 struct gfs2_glock *i_gl; /* Move into i_gh? */ 265 struct gfs2_holder i_iopen_gh; 266 struct gfs2_holder i_gh; /* for prepare/commit_write only */ 267 struct gfs2_alloc *i_alloc; 268 u64 i_last_rg_alloc; 269 270 struct rw_semaphore i_rw_mutex; 271 }; 272 273 /* 274 * Since i_inode is the first element of struct gfs2_inode, 275 * this is effectively a cast. 276 */ 277 static inline struct gfs2_inode *GFS2_I(struct inode *inode) 278 { 279 return container_of(inode, struct gfs2_inode, i_inode); 280 } 281 282 static inline struct gfs2_sbd *GFS2_SB(const struct inode *inode) 283 { 284 return inode->i_sb->s_fs_info; 285 } 286 287 struct gfs2_file { 288 struct mutex f_fl_mutex; 289 struct gfs2_holder f_fl_gh; 290 }; 291 292 struct gfs2_revoke_replay { 293 struct list_head rr_list; 294 u64 rr_blkno; 295 unsigned int rr_where; 296 }; 297 298 enum { 299 QDF_USER = 0, 300 QDF_CHANGE = 1, 301 QDF_LOCKED = 2, 302 }; 303 304 struct gfs2_quota_data { 305 struct list_head qd_list; 306 unsigned int qd_count; 307 308 u32 qd_id; 309 unsigned long qd_flags; /* QDF_... */ 310 311 s64 qd_change; 312 s64 qd_change_sync; 313 314 unsigned int qd_slot; 315 unsigned int qd_slot_count; 316 317 struct buffer_head *qd_bh; 318 struct gfs2_quota_change *qd_bh_qc; 319 unsigned int qd_bh_count; 320 321 struct gfs2_glock *qd_gl; 322 struct gfs2_quota_lvb qd_qb; 323 324 u64 qd_sync_gen; 325 unsigned long qd_last_warn; 326 unsigned long qd_last_touched; 327 }; 328 329 struct gfs2_trans { 330 unsigned long tr_ip; 331 332 unsigned int tr_blocks; 333 unsigned int tr_revokes; 334 unsigned int tr_reserved; 335 336 struct gfs2_holder tr_t_gh; 337 338 int tr_touched; 339 340 unsigned int tr_num_buf; 341 unsigned int tr_num_buf_new; 342 unsigned int tr_num_databuf_new; 343 unsigned int tr_num_buf_rm; 344 unsigned int tr_num_databuf_rm; 345 struct list_head tr_list_buf; 346 347 unsigned int tr_num_revoke; 348 unsigned int tr_num_revoke_rm; 349 }; 350 351 struct gfs2_ail { 352 struct list_head ai_list; 353 354 unsigned int ai_first; 355 struct list_head ai_ail1_list; 356 struct list_head ai_ail2_list; 357 358 u64 ai_sync_gen; 359 }; 360 361 struct gfs2_journal_extent { 362 struct list_head extent_list; 363 364 unsigned int lblock; /* First logical block */ 365 u64 dblock; /* First disk block */ 366 u64 blocks; 367 }; 368 369 struct gfs2_jdesc { 370 struct list_head jd_list; 371 struct list_head extent_list; 372 373 struct inode *jd_inode; 374 unsigned int jd_jid; 375 int jd_dirty; 376 377 unsigned int jd_blocks; 378 }; 379 380 struct gfs2_statfs_change_host { 381 s64 sc_total; 382 s64 sc_free; 383 s64 sc_dinodes; 384 }; 385 386 #define GFS2_GLOCKD_DEFAULT 1 387 #define GFS2_GLOCKD_MAX 16 388 389 #define GFS2_QUOTA_DEFAULT GFS2_QUOTA_OFF 390 #define GFS2_QUOTA_OFF 0 391 #define GFS2_QUOTA_ACCOUNT 1 392 #define GFS2_QUOTA_ON 2 393 394 #define GFS2_DATA_DEFAULT GFS2_DATA_ORDERED 395 #define GFS2_DATA_WRITEBACK 1 396 #define GFS2_DATA_ORDERED 2 397 398 struct gfs2_args { 399 char ar_lockproto[GFS2_LOCKNAME_LEN]; /* Name of the Lock Protocol */ 400 char ar_locktable[GFS2_LOCKNAME_LEN]; /* Name of the Lock Table */ 401 char ar_hostdata[GFS2_LOCKNAME_LEN]; /* Host specific data */ 402 int ar_spectator; /* Don't get a journal because we're always RO */ 403 int ar_ignore_local_fs; /* Don't optimize even if local_fs is 1 */ 404 int ar_localflocks; /* Let the VFS do flock|fcntl locks for us */ 405 int ar_localcaching; /* Local-style caching (dangerous on multihost) */ 406 int ar_debug; /* Oops on errors instead of trying to be graceful */ 407 int ar_upgrade; /* Upgrade ondisk/multihost format */ 408 unsigned int ar_num_glockd; /* Number of glockd threads */ 409 int ar_posix_acl; /* Enable posix acls */ 410 int ar_quota; /* off/account/on */ 411 int ar_suiddir; /* suiddir support */ 412 int ar_data; /* ordered/writeback */ 413 }; 414 415 struct gfs2_tune { 416 spinlock_t gt_spin; 417 418 unsigned int gt_demote_secs; /* Cache retention for unheld glock */ 419 unsigned int gt_incore_log_blocks; 420 unsigned int gt_log_flush_secs; 421 422 unsigned int gt_recoverd_secs; 423 unsigned int gt_logd_secs; 424 unsigned int gt_quotad_secs; 425 426 unsigned int gt_quota_simul_sync; /* Max quotavals to sync at once */ 427 unsigned int gt_quota_warn_period; /* Secs between quota warn msgs */ 428 unsigned int gt_quota_scale_num; /* Numerator */ 429 unsigned int gt_quota_scale_den; /* Denominator */ 430 unsigned int gt_quota_cache_secs; 431 unsigned int gt_quota_quantum; /* Secs between syncs to quota file */ 432 unsigned int gt_atime_quantum; /* Min secs between atime updates */ 433 unsigned int gt_new_files_jdata; 434 unsigned int gt_new_files_directio; 435 unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */ 436 unsigned int gt_stall_secs; /* Detects trouble! */ 437 unsigned int gt_complain_secs; 438 unsigned int gt_statfs_quantum; 439 unsigned int gt_statfs_slow; 440 }; 441 442 enum { 443 SDF_JOURNAL_CHECKED = 0, 444 SDF_JOURNAL_LIVE = 1, 445 SDF_SHUTDOWN = 2, 446 SDF_NOATIME = 3, 447 }; 448 449 #define GFS2_FSNAME_LEN 256 450 451 struct gfs2_inum_host { 452 u64 no_formal_ino; 453 u64 no_addr; 454 }; 455 456 struct gfs2_sb_host { 457 u32 sb_magic; 458 u32 sb_type; 459 u32 sb_format; 460 461 u32 sb_fs_format; 462 u32 sb_multihost_format; 463 u32 sb_bsize; 464 u32 sb_bsize_shift; 465 466 struct gfs2_inum_host sb_master_dir; 467 struct gfs2_inum_host sb_root_dir; 468 469 char sb_lockproto[GFS2_LOCKNAME_LEN]; 470 char sb_locktable[GFS2_LOCKNAME_LEN]; 471 }; 472 473 struct gfs2_sbd { 474 struct super_block *sd_vfs; 475 struct super_block *sd_vfs_meta; 476 struct kobject sd_kobj; 477 unsigned long sd_flags; /* SDF_... */ 478 struct gfs2_sb_host sd_sb; 479 480 /* Constants computed on mount */ 481 482 u32 sd_fsb2bb; 483 u32 sd_fsb2bb_shift; 484 u32 sd_diptrs; /* Number of pointers in a dinode */ 485 u32 sd_inptrs; /* Number of pointers in a indirect block */ 486 u32 sd_jbsize; /* Size of a journaled data block */ 487 u32 sd_hash_bsize; /* sizeof(exhash block) */ 488 u32 sd_hash_bsize_shift; 489 u32 sd_hash_ptrs; /* Number of pointers in a hash block */ 490 u32 sd_qc_per_block; 491 u32 sd_max_dirres; /* Max blocks needed to add a directory entry */ 492 u32 sd_max_height; /* Max height of a file's metadata tree */ 493 u64 sd_heightsize[GFS2_MAX_META_HEIGHT]; 494 u32 sd_max_jheight; /* Max height of journaled file's meta tree */ 495 u64 sd_jheightsize[GFS2_MAX_META_HEIGHT]; 496 497 struct gfs2_args sd_args; /* Mount arguments */ 498 struct gfs2_tune sd_tune; /* Filesystem tuning structure */ 499 500 /* Lock Stuff */ 501 502 struct lm_lockstruct sd_lockstruct; 503 struct list_head sd_reclaim_list; 504 spinlock_t sd_reclaim_lock; 505 wait_queue_head_t sd_reclaim_wq; 506 atomic_t sd_reclaim_count; 507 struct gfs2_holder sd_live_gh; 508 struct gfs2_glock *sd_rename_gl; 509 struct gfs2_glock *sd_trans_gl; 510 511 /* Inode Stuff */ 512 513 struct inode *sd_master_dir; 514 struct inode *sd_jindex; 515 struct inode *sd_inum_inode; 516 struct inode *sd_statfs_inode; 517 struct inode *sd_ir_inode; 518 struct inode *sd_sc_inode; 519 struct inode *sd_qc_inode; 520 struct inode *sd_rindex; 521 struct inode *sd_quota_inode; 522 523 /* Inum stuff */ 524 525 struct mutex sd_inum_mutex; 526 527 /* StatFS stuff */ 528 529 spinlock_t sd_statfs_spin; 530 struct gfs2_statfs_change_host sd_statfs_master; 531 struct gfs2_statfs_change_host sd_statfs_local; 532 unsigned long sd_statfs_sync_time; 533 534 /* Resource group stuff */ 535 536 u64 sd_rindex_vn; 537 spinlock_t sd_rindex_spin; 538 struct mutex sd_rindex_mutex; 539 struct list_head sd_rindex_list; 540 struct list_head sd_rindex_mru_list; 541 struct list_head sd_rindex_recent_list; 542 struct gfs2_rgrpd *sd_rindex_forward; 543 unsigned int sd_rgrps; 544 545 /* Journal index stuff */ 546 547 struct list_head sd_jindex_list; 548 spinlock_t sd_jindex_spin; 549 struct mutex sd_jindex_mutex; 550 unsigned int sd_journals; 551 unsigned long sd_jindex_refresh_time; 552 553 struct gfs2_jdesc *sd_jdesc; 554 struct gfs2_holder sd_journal_gh; 555 struct gfs2_holder sd_jinode_gh; 556 557 struct gfs2_holder sd_ir_gh; 558 struct gfs2_holder sd_sc_gh; 559 struct gfs2_holder sd_qc_gh; 560 561 /* Daemon stuff */ 562 563 struct task_struct *sd_recoverd_process; 564 struct task_struct *sd_logd_process; 565 struct task_struct *sd_quotad_process; 566 struct task_struct *sd_glockd_process[GFS2_GLOCKD_MAX]; 567 unsigned int sd_glockd_num; 568 569 /* Quota stuff */ 570 571 struct list_head sd_quota_list; 572 atomic_t sd_quota_count; 573 spinlock_t sd_quota_spin; 574 struct mutex sd_quota_mutex; 575 576 unsigned int sd_quota_slots; 577 unsigned int sd_quota_chunks; 578 unsigned char **sd_quota_bitmap; 579 580 u64 sd_quota_sync_gen; 581 unsigned long sd_quota_sync_time; 582 583 /* Log stuff */ 584 585 spinlock_t sd_log_lock; 586 587 unsigned int sd_log_blks_reserved; 588 unsigned int sd_log_commited_buf; 589 unsigned int sd_log_commited_databuf; 590 unsigned int sd_log_commited_revoke; 591 592 unsigned int sd_log_num_buf; 593 unsigned int sd_log_num_revoke; 594 unsigned int sd_log_num_rg; 595 unsigned int sd_log_num_databuf; 596 597 struct list_head sd_log_le_buf; 598 struct list_head sd_log_le_revoke; 599 struct list_head sd_log_le_rg; 600 struct list_head sd_log_le_databuf; 601 struct list_head sd_log_le_ordered; 602 603 atomic_t sd_log_blks_free; 604 struct mutex sd_log_reserve_mutex; 605 606 u64 sd_log_sequence; 607 unsigned int sd_log_head; 608 unsigned int sd_log_tail; 609 int sd_log_idle; 610 611 unsigned long sd_log_flush_time; 612 struct rw_semaphore sd_log_flush_lock; 613 atomic_t sd_log_in_flight; 614 wait_queue_head_t sd_log_flush_wait; 615 616 unsigned int sd_log_flush_head; 617 u64 sd_log_flush_wrapped; 618 619 struct list_head sd_ail1_list; 620 struct list_head sd_ail2_list; 621 u64 sd_ail_sync_gen; 622 623 /* Replay stuff */ 624 625 struct list_head sd_revoke_list; 626 unsigned int sd_replay_tail; 627 628 unsigned int sd_found_blocks; 629 unsigned int sd_found_revokes; 630 unsigned int sd_replayed_blocks; 631 632 /* For quiescing the filesystem */ 633 634 struct gfs2_holder sd_freeze_gh; 635 struct mutex sd_freeze_lock; 636 unsigned int sd_freeze_count; 637 638 /* Counters */ 639 640 atomic_t sd_glock_count; 641 atomic_t sd_glock_held_count; 642 atomic_t sd_inode_count; 643 atomic_t sd_reclaimed; 644 645 char sd_fsname[GFS2_FSNAME_LEN]; 646 char sd_table_name[GFS2_FSNAME_LEN]; 647 char sd_proto_name[GFS2_FSNAME_LEN]; 648 649 /* Debugging crud */ 650 651 unsigned long sd_last_warning; 652 struct vfsmount *sd_gfs2mnt; 653 struct dentry *debugfs_dir; /* debugfs directory */ 654 struct dentry *debugfs_dentry_glocks; /* for debugfs */ 655 }; 656 657 #endif /* __INCORE_DOT_H__ */ 658 659