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/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_before_commit) (struct gfs2_sbd *sdp); 48 void (*lo_after_commit) (struct gfs2_sbd *sdp, struct gfs2_ail *ai); 49 void (*lo_before_scan) (struct gfs2_jdesc *jd, 50 struct gfs2_log_header_host *head, int pass); 51 int (*lo_scan_elements) (struct gfs2_jdesc *jd, unsigned int start, 52 struct gfs2_log_descriptor *ld, __be64 *ptr, 53 int pass); 54 void (*lo_after_scan) (struct gfs2_jdesc *jd, int error, int pass); 55 const char *lo_name; 56 }; 57 58 struct gfs2_log_element { 59 struct list_head le_list; 60 const struct gfs2_log_operations *le_ops; 61 }; 62 63 struct gfs2_bitmap { 64 struct buffer_head *bi_bh; 65 char *bi_clone; 66 u32 bi_offset; 67 u32 bi_start; 68 u32 bi_len; 69 }; 70 71 struct gfs2_rgrp_host { 72 u32 rg_free; 73 u32 rg_dinodes; 74 u64 rg_igeneration; 75 }; 76 77 struct gfs2_rgrpd { 78 struct list_head rd_list; /* Link with superblock */ 79 struct list_head rd_list_mru; 80 struct list_head rd_recent; /* Recently used rgrps */ 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 struct gfs2_rgrp_host rd_rg; 88 struct gfs2_bitmap *rd_bits; 89 unsigned int rd_bh_count; 90 struct mutex rd_mutex; 91 u32 rd_free_clone; 92 struct gfs2_log_element rd_le; 93 u32 rd_last_alloc; 94 struct gfs2_sbd *rd_sbd; 95 unsigned char rd_flags; 96 #define GFS2_RDF_CHECK 0x01 /* Need to check for unlinked inodes */ 97 #define GFS2_RDF_NOALLOC 0x02 /* rg prohibits allocation */ 98 #define GFS2_RDF_UPTODATE 0x04 /* rg is up to date */ 99 }; 100 101 enum gfs2_state_bits { 102 BH_Pinned = BH_PrivateStart, 103 BH_Escaped = BH_PrivateStart + 1, 104 }; 105 106 BUFFER_FNS(Pinned, pinned) 107 TAS_BUFFER_FNS(Pinned, pinned) 108 BUFFER_FNS(Escaped, escaped) 109 TAS_BUFFER_FNS(Escaped, escaped) 110 111 struct gfs2_bufdata { 112 struct buffer_head *bd_bh; 113 struct gfs2_glock *bd_gl; 114 115 union { 116 struct list_head list_tr; 117 u64 blkno; 118 } u; 119 #define bd_list_tr u.list_tr 120 #define bd_blkno u.blkno 121 122 struct gfs2_log_element bd_le; 123 124 struct gfs2_ail *bd_ail; 125 struct list_head bd_ail_st_list; 126 struct list_head bd_ail_gl_list; 127 }; 128 129 struct gfs2_glock_operations { 130 void (*go_xmote_th) (struct gfs2_glock *gl); 131 void (*go_xmote_bh) (struct gfs2_glock *gl); 132 void (*go_inval) (struct gfs2_glock *gl, int flags); 133 int (*go_demote_ok) (struct gfs2_glock *gl); 134 int (*go_lock) (struct gfs2_holder *gh); 135 void (*go_unlock) (struct gfs2_holder *gh); 136 const int go_type; 137 const unsigned long go_min_hold_time; 138 }; 139 140 enum { 141 /* States */ 142 HIF_HOLDER = 6, 143 HIF_FIRST = 7, 144 HIF_ABORTED = 9, 145 HIF_WAIT = 10, 146 }; 147 148 struct gfs2_holder { 149 struct list_head gh_list; 150 151 struct gfs2_glock *gh_gl; 152 struct pid *gh_owner_pid; 153 unsigned int gh_state; 154 unsigned gh_flags; 155 156 int gh_error; 157 unsigned long gh_iflags; 158 unsigned long gh_ip; 159 }; 160 161 enum { 162 GLF_LOCK = 1, 163 GLF_STICKY = 2, 164 GLF_DEMOTE = 3, 165 GLF_PENDING_DEMOTE = 4, 166 GLF_DIRTY = 5, 167 GLF_DEMOTE_IN_PROGRESS = 6, 168 GLF_LFLUSH = 7, 169 GLF_WAITERS2 = 8, 170 GLF_CONV_DEADLK = 9, 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 struct pid *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 */ 190 191 const struct gfs2_glock_operations *gl_ops; 192 193 struct gfs2_holder *gl_req_gh; 194 195 void *gl_lock; 196 char *gl_lvb; 197 atomic_t gl_lvb_count; 198 199 unsigned long gl_stamp; 200 unsigned long gl_tchange; 201 void *gl_object; 202 203 struct list_head gl_reclaim; 204 205 struct gfs2_sbd *gl_sbd; 206 207 struct inode *gl_aspace; 208 struct list_head gl_ail_list; 209 atomic_t gl_ail_count; 210 struct delayed_work gl_work; 211 }; 212 213 #define GFS2_MIN_LVB_SIZE 32 /* Min size of LVB that gfs2 supports */ 214 215 struct gfs2_alloc { 216 /* Quota stuff */ 217 218 struct gfs2_quota_data *al_qd[2*MAXQUOTAS]; 219 struct gfs2_holder al_qd_ghs[2*MAXQUOTAS]; 220 unsigned int al_qd_num; 221 222 u32 al_requested; /* Filled in by caller of gfs2_inplace_reserve() */ 223 u32 al_alloced; /* Filled in by gfs2_alloc_*() */ 224 225 /* Filled in by gfs2_inplace_reserve() */ 226 227 unsigned int al_line; 228 char *al_file; 229 struct gfs2_holder al_ri_gh; 230 struct gfs2_holder al_rgd_gh; 231 struct gfs2_rgrpd *al_rgd; 232 233 }; 234 235 enum { 236 GIF_INVALID = 0, 237 GIF_QD_LOCKED = 1, 238 GIF_SW_PAGED = 3, 239 GIF_USER = 4, /* user inode, not metadata addr space */ 240 }; 241 242 struct gfs2_dinode_host { 243 u64 di_size; /* number of bytes in file */ 244 u64 di_generation; /* generation number for NFS */ 245 u32 di_flags; /* GFS2_DIF_... */ 246 /* These only apply to directories */ 247 u32 di_entries; /* The number of entries in the directory */ 248 u64 di_eattr; /* extended attribute block number */ 249 }; 250 251 struct gfs2_inode { 252 struct inode i_inode; 253 u64 i_no_addr; 254 u64 i_no_formal_ino; 255 unsigned long i_flags; /* GIF_... */ 256 257 struct gfs2_dinode_host i_di; /* To be replaced by ref to block */ 258 259 struct gfs2_glock *i_gl; /* Move into i_gh? */ 260 struct gfs2_holder i_iopen_gh; 261 struct gfs2_holder i_gh; /* for prepare/commit_write only */ 262 struct gfs2_alloc *i_alloc; 263 u64 i_goal; /* goal block for allocations */ 264 struct rw_semaphore i_rw_mutex; 265 u8 i_height; 266 u8 i_depth; 267 }; 268 269 /* 270 * Since i_inode is the first element of struct gfs2_inode, 271 * this is effectively a cast. 272 */ 273 static inline struct gfs2_inode *GFS2_I(struct inode *inode) 274 { 275 return container_of(inode, struct gfs2_inode, i_inode); 276 } 277 278 static inline struct gfs2_sbd *GFS2_SB(const struct inode *inode) 279 { 280 return inode->i_sb->s_fs_info; 281 } 282 283 struct gfs2_file { 284 struct mutex f_fl_mutex; 285 struct gfs2_holder f_fl_gh; 286 }; 287 288 struct gfs2_revoke_replay { 289 struct list_head rr_list; 290 u64 rr_blkno; 291 unsigned int rr_where; 292 }; 293 294 enum { 295 QDF_USER = 0, 296 QDF_CHANGE = 1, 297 QDF_LOCKED = 2, 298 }; 299 300 struct gfs2_quota_data { 301 struct list_head qd_list; 302 unsigned int qd_count; 303 304 u32 qd_id; 305 unsigned long qd_flags; /* QDF_... */ 306 307 s64 qd_change; 308 s64 qd_change_sync; 309 310 unsigned int qd_slot; 311 unsigned int qd_slot_count; 312 313 struct buffer_head *qd_bh; 314 struct gfs2_quota_change *qd_bh_qc; 315 unsigned int qd_bh_count; 316 317 struct gfs2_glock *qd_gl; 318 struct gfs2_quota_lvb qd_qb; 319 320 u64 qd_sync_gen; 321 unsigned long qd_last_warn; 322 unsigned long qd_last_touched; 323 }; 324 325 struct gfs2_trans { 326 unsigned long tr_ip; 327 328 unsigned int tr_blocks; 329 unsigned int tr_revokes; 330 unsigned int tr_reserved; 331 332 struct gfs2_holder tr_t_gh; 333 334 int tr_touched; 335 336 unsigned int tr_num_buf; 337 unsigned int tr_num_buf_new; 338 unsigned int tr_num_databuf_new; 339 unsigned int tr_num_buf_rm; 340 unsigned int tr_num_databuf_rm; 341 struct list_head tr_list_buf; 342 343 unsigned int tr_num_revoke; 344 unsigned int tr_num_revoke_rm; 345 }; 346 347 struct gfs2_ail { 348 struct list_head ai_list; 349 350 unsigned int ai_first; 351 struct list_head ai_ail1_list; 352 struct list_head ai_ail2_list; 353 354 u64 ai_sync_gen; 355 }; 356 357 struct gfs2_journal_extent { 358 struct list_head extent_list; 359 360 unsigned int lblock; /* First logical block */ 361 u64 dblock; /* First disk block */ 362 u64 blocks; 363 }; 364 365 struct gfs2_jdesc { 366 struct list_head jd_list; 367 struct list_head extent_list; 368 369 struct inode *jd_inode; 370 unsigned int jd_jid; 371 int jd_dirty; 372 373 unsigned int jd_blocks; 374 }; 375 376 struct gfs2_statfs_change_host { 377 s64 sc_total; 378 s64 sc_free; 379 s64 sc_dinodes; 380 }; 381 382 #define GFS2_GLOCKD_DEFAULT 1 383 #define GFS2_GLOCKD_MAX 16 384 385 #define GFS2_QUOTA_DEFAULT GFS2_QUOTA_OFF 386 #define GFS2_QUOTA_OFF 0 387 #define GFS2_QUOTA_ACCOUNT 1 388 #define GFS2_QUOTA_ON 2 389 390 #define GFS2_DATA_DEFAULT GFS2_DATA_ORDERED 391 #define GFS2_DATA_WRITEBACK 1 392 #define GFS2_DATA_ORDERED 2 393 394 struct gfs2_args { 395 char ar_lockproto[GFS2_LOCKNAME_LEN]; /* Name of the Lock Protocol */ 396 char ar_locktable[GFS2_LOCKNAME_LEN]; /* Name of the Lock Table */ 397 char ar_hostdata[GFS2_LOCKNAME_LEN]; /* Host specific data */ 398 int ar_spectator; /* Don't get a journal because we're always RO */ 399 int ar_ignore_local_fs; /* Don't optimize even if local_fs is 1 */ 400 int ar_localflocks; /* Let the VFS do flock|fcntl locks for us */ 401 int ar_localcaching; /* Local-style caching (dangerous on multihost) */ 402 int ar_debug; /* Oops on errors instead of trying to be graceful */ 403 int ar_upgrade; /* Upgrade ondisk/multihost format */ 404 unsigned int ar_num_glockd; /* Number of glockd threads */ 405 int ar_posix_acl; /* Enable posix acls */ 406 int ar_quota; /* off/account/on */ 407 int ar_suiddir; /* suiddir support */ 408 int ar_data; /* ordered/writeback */ 409 }; 410 411 struct gfs2_tune { 412 spinlock_t gt_spin; 413 414 unsigned int gt_demote_secs; /* Cache retention for unheld glock */ 415 unsigned int gt_incore_log_blocks; 416 unsigned int gt_log_flush_secs; 417 418 unsigned int gt_recoverd_secs; 419 unsigned int gt_logd_secs; 420 unsigned int gt_quotad_secs; 421 422 unsigned int gt_quota_simul_sync; /* Max quotavals to sync at once */ 423 unsigned int gt_quota_warn_period; /* Secs between quota warn msgs */ 424 unsigned int gt_quota_scale_num; /* Numerator */ 425 unsigned int gt_quota_scale_den; /* Denominator */ 426 unsigned int gt_quota_cache_secs; 427 unsigned int gt_quota_quantum; /* Secs between syncs to quota file */ 428 unsigned int gt_atime_quantum; /* Min secs between atime updates */ 429 unsigned int gt_new_files_jdata; 430 unsigned int gt_new_files_directio; 431 unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */ 432 unsigned int gt_stall_secs; /* Detects trouble! */ 433 unsigned int gt_complain_secs; 434 unsigned int gt_statfs_quantum; 435 unsigned int gt_statfs_slow; 436 }; 437 438 enum { 439 SDF_JOURNAL_CHECKED = 0, 440 SDF_JOURNAL_LIVE = 1, 441 SDF_SHUTDOWN = 2, 442 SDF_NOATIME = 3, 443 }; 444 445 #define GFS2_FSNAME_LEN 256 446 447 struct gfs2_inum_host { 448 u64 no_formal_ino; 449 u64 no_addr; 450 }; 451 452 struct gfs2_sb_host { 453 u32 sb_magic; 454 u32 sb_type; 455 u32 sb_format; 456 457 u32 sb_fs_format; 458 u32 sb_multihost_format; 459 u32 sb_bsize; 460 u32 sb_bsize_shift; 461 462 struct gfs2_inum_host sb_master_dir; 463 struct gfs2_inum_host sb_root_dir; 464 465 char sb_lockproto[GFS2_LOCKNAME_LEN]; 466 char sb_locktable[GFS2_LOCKNAME_LEN]; 467 }; 468 469 struct gfs2_sbd { 470 struct super_block *sd_vfs; 471 struct super_block *sd_vfs_meta; 472 struct kobject sd_kobj; 473 unsigned long sd_flags; /* SDF_... */ 474 struct gfs2_sb_host sd_sb; 475 476 /* Constants computed on mount */ 477 478 u32 sd_fsb2bb; 479 u32 sd_fsb2bb_shift; 480 u32 sd_diptrs; /* Number of pointers in a dinode */ 481 u32 sd_inptrs; /* Number of pointers in a indirect block */ 482 u32 sd_jbsize; /* Size of a journaled data block */ 483 u32 sd_hash_bsize; /* sizeof(exhash block) */ 484 u32 sd_hash_bsize_shift; 485 u32 sd_hash_ptrs; /* Number of pointers in a hash block */ 486 u32 sd_qc_per_block; 487 u32 sd_max_dirres; /* Max blocks needed to add a directory entry */ 488 u32 sd_max_height; /* Max height of a file's metadata tree */ 489 u64 sd_heightsize[GFS2_MAX_META_HEIGHT + 1]; 490 u32 sd_max_jheight; /* Max height of journaled file's meta tree */ 491 u64 sd_jheightsize[GFS2_MAX_META_HEIGHT + 1]; 492 493 struct gfs2_args sd_args; /* Mount arguments */ 494 struct gfs2_tune sd_tune; /* Filesystem tuning structure */ 495 496 /* Lock Stuff */ 497 498 struct lm_lockstruct sd_lockstruct; 499 struct list_head sd_reclaim_list; 500 spinlock_t sd_reclaim_lock; 501 wait_queue_head_t sd_reclaim_wq; 502 atomic_t sd_reclaim_count; 503 struct gfs2_holder sd_live_gh; 504 struct gfs2_glock *sd_rename_gl; 505 struct gfs2_glock *sd_trans_gl; 506 507 /* Inode Stuff */ 508 509 struct inode *sd_master_dir; 510 struct inode *sd_jindex; 511 struct inode *sd_inum_inode; 512 struct inode *sd_statfs_inode; 513 struct inode *sd_ir_inode; 514 struct inode *sd_sc_inode; 515 struct inode *sd_qc_inode; 516 struct inode *sd_rindex; 517 struct inode *sd_quota_inode; 518 519 /* Inum stuff */ 520 521 struct mutex sd_inum_mutex; 522 523 /* StatFS stuff */ 524 525 spinlock_t sd_statfs_spin; 526 struct gfs2_statfs_change_host sd_statfs_master; 527 struct gfs2_statfs_change_host sd_statfs_local; 528 unsigned long sd_statfs_sync_time; 529 530 /* Resource group stuff */ 531 532 int sd_rindex_uptodate; 533 spinlock_t sd_rindex_spin; 534 struct mutex sd_rindex_mutex; 535 struct list_head sd_rindex_list; 536 struct list_head sd_rindex_mru_list; 537 struct list_head sd_rindex_recent_list; 538 struct gfs2_rgrpd *sd_rindex_forward; 539 unsigned int sd_rgrps; 540 541 /* Journal index stuff */ 542 543 struct list_head sd_jindex_list; 544 spinlock_t sd_jindex_spin; 545 struct mutex sd_jindex_mutex; 546 unsigned int sd_journals; 547 unsigned long sd_jindex_refresh_time; 548 549 struct gfs2_jdesc *sd_jdesc; 550 struct gfs2_holder sd_journal_gh; 551 struct gfs2_holder sd_jinode_gh; 552 553 struct gfs2_holder sd_ir_gh; 554 struct gfs2_holder sd_sc_gh; 555 struct gfs2_holder sd_qc_gh; 556 557 /* Daemon stuff */ 558 559 struct task_struct *sd_recoverd_process; 560 struct task_struct *sd_logd_process; 561 struct task_struct *sd_quotad_process; 562 struct task_struct *sd_glockd_process[GFS2_GLOCKD_MAX]; 563 unsigned int sd_glockd_num; 564 565 /* Quota stuff */ 566 567 struct list_head sd_quota_list; 568 atomic_t sd_quota_count; 569 spinlock_t sd_quota_spin; 570 struct mutex sd_quota_mutex; 571 572 unsigned int sd_quota_slots; 573 unsigned int sd_quota_chunks; 574 unsigned char **sd_quota_bitmap; 575 576 u64 sd_quota_sync_gen; 577 unsigned long sd_quota_sync_time; 578 579 /* Log stuff */ 580 581 spinlock_t sd_log_lock; 582 583 unsigned int sd_log_blks_reserved; 584 unsigned int sd_log_commited_buf; 585 unsigned int sd_log_commited_databuf; 586 unsigned int sd_log_commited_revoke; 587 588 unsigned int sd_log_num_buf; 589 unsigned int sd_log_num_revoke; 590 unsigned int sd_log_num_rg; 591 unsigned int sd_log_num_databuf; 592 593 struct list_head sd_log_le_buf; 594 struct list_head sd_log_le_revoke; 595 struct list_head sd_log_le_rg; 596 struct list_head sd_log_le_databuf; 597 struct list_head sd_log_le_ordered; 598 599 atomic_t sd_log_blks_free; 600 struct mutex sd_log_reserve_mutex; 601 602 u64 sd_log_sequence; 603 unsigned int sd_log_head; 604 unsigned int sd_log_tail; 605 int sd_log_idle; 606 607 unsigned long sd_log_flush_time; 608 struct rw_semaphore sd_log_flush_lock; 609 atomic_t sd_log_in_flight; 610 wait_queue_head_t sd_log_flush_wait; 611 612 unsigned int sd_log_flush_head; 613 u64 sd_log_flush_wrapped; 614 615 struct list_head sd_ail1_list; 616 struct list_head sd_ail2_list; 617 u64 sd_ail_sync_gen; 618 619 /* Replay stuff */ 620 621 struct list_head sd_revoke_list; 622 unsigned int sd_replay_tail; 623 624 unsigned int sd_found_blocks; 625 unsigned int sd_found_revokes; 626 unsigned int sd_replayed_blocks; 627 628 /* For quiescing the filesystem */ 629 630 struct gfs2_holder sd_freeze_gh; 631 struct mutex sd_freeze_lock; 632 unsigned int sd_freeze_count; 633 634 /* Counters */ 635 636 atomic_t sd_reclaimed; 637 638 char sd_fsname[GFS2_FSNAME_LEN]; 639 char sd_table_name[GFS2_FSNAME_LEN]; 640 char sd_proto_name[GFS2_FSNAME_LEN]; 641 642 /* Debugging crud */ 643 644 unsigned long sd_last_warning; 645 struct vfsmount *sd_gfs2mnt; 646 struct dentry *debugfs_dir; /* debugfs directory */ 647 struct dentry *debugfs_dentry_glocks; /* for debugfs */ 648 }; 649 650 #endif /* __INCORE_DOT_H__ */ 651 652