1/* SPDX-License-Identifier: GPL-2.0-or-later */ 2/* -*- mode: c; c-basic-offset: 8; -*- 3 * vim: noexpandtab sw=8 ts=8 sts=0: 4 * 5 * ocfs2.h 6 * 7 * Defines macros and structures used in OCFS2 8 * 9 * Copyright (C) 2002, 2004 Oracle. All rights reserved. 10 */ 11 12#ifndef OCFS2_H 13#define OCFS2_H 14 15#include <linux/spinlock.h> 16#include <linux/sched.h> 17#include <linux/wait.h> 18#include <linux/list.h> 19#include <linux/llist.h> 20#include <linux/rbtree.h> 21#include <linux/workqueue.h> 22#include <linux/kref.h> 23#include <linux/mutex.h> 24#include <linux/lockdep.h> 25#include <linux/jbd2.h> 26 27/* For union ocfs2_dlm_lksb */ 28#include "stackglue.h" 29 30#include "ocfs2_fs.h" 31#include "ocfs2_lockid.h" 32#include "ocfs2_ioctl.h" 33 34/* For struct ocfs2_blockcheck_stats */ 35#include "blockcheck.h" 36 37#include "reservations.h" 38 39#include "filecheck.h" 40 41/* Caching of metadata buffers */ 42 43/* Most user visible OCFS2 inodes will have very few pieces of 44 * metadata, but larger files (including bitmaps, etc) must be taken 45 * into account when designing an access scheme. We allow a small 46 * amount of inlined blocks to be stored on an array and grow the 47 * structure into a rb tree when necessary. */ 48#define OCFS2_CACHE_INFO_MAX_ARRAY 2 49 50/* Flags for ocfs2_caching_info */ 51 52enum ocfs2_caching_info_flags { 53 /* Indicates that the metadata cache is using the inline array */ 54 OCFS2_CACHE_FL_INLINE = 1<<1, 55}; 56 57struct ocfs2_caching_operations; 58struct ocfs2_caching_info { 59 /* 60 * The parent structure provides the locks, but because the 61 * parent structure can differ, it provides locking operations 62 * to struct ocfs2_caching_info. 63 */ 64 const struct ocfs2_caching_operations *ci_ops; 65 66 /* next two are protected by trans_inc_lock */ 67 /* which transaction were we created on? Zero if none. */ 68 unsigned long ci_created_trans; 69 /* last transaction we were a part of. */ 70 unsigned long ci_last_trans; 71 72 /* Cache structures */ 73 unsigned int ci_flags; 74 unsigned int ci_num_cached; 75 union { 76 sector_t ci_array[OCFS2_CACHE_INFO_MAX_ARRAY]; 77 struct rb_root ci_tree; 78 } ci_cache; 79}; 80/* 81 * Need this prototype here instead of in uptodate.h because journal.h 82 * uses it. 83 */ 84struct super_block *ocfs2_metadata_cache_get_super(struct ocfs2_caching_info *ci); 85 86/* this limits us to 256 nodes 87 * if we need more, we can do a kmalloc for the map */ 88#define OCFS2_NODE_MAP_MAX_NODES 256 89struct ocfs2_node_map { 90 u16 num_nodes; 91 unsigned long map[BITS_TO_LONGS(OCFS2_NODE_MAP_MAX_NODES)]; 92}; 93 94enum ocfs2_ast_action { 95 OCFS2_AST_INVALID = 0, 96 OCFS2_AST_ATTACH, 97 OCFS2_AST_CONVERT, 98 OCFS2_AST_DOWNCONVERT, 99}; 100 101/* actions for an unlockast function to take. */ 102enum ocfs2_unlock_action { 103 OCFS2_UNLOCK_INVALID = 0, 104 OCFS2_UNLOCK_CANCEL_CONVERT, 105 OCFS2_UNLOCK_DROP_LOCK, 106}; 107 108/* ocfs2_lock_res->l_flags flags. */ 109#define OCFS2_LOCK_ATTACHED (0x00000001) /* we have initialized 110 * the lvb */ 111#define OCFS2_LOCK_BUSY (0x00000002) /* we are currently in 112 * dlm_lock */ 113#define OCFS2_LOCK_BLOCKED (0x00000004) /* blocked waiting to 114 * downconvert*/ 115#define OCFS2_LOCK_LOCAL (0x00000008) /* newly created inode */ 116#define OCFS2_LOCK_NEEDS_REFRESH (0x00000010) 117#define OCFS2_LOCK_REFRESHING (0x00000020) 118#define OCFS2_LOCK_INITIALIZED (0x00000040) /* track initialization 119 * for shutdown paths */ 120#define OCFS2_LOCK_FREEING (0x00000080) /* help dlmglue track 121 * when to skip queueing 122 * a lock because it's 123 * about to be 124 * dropped. */ 125#define OCFS2_LOCK_QUEUED (0x00000100) /* queued for downconvert */ 126#define OCFS2_LOCK_NOCACHE (0x00000200) /* don't use a holder count */ 127#define OCFS2_LOCK_PENDING (0x00000400) /* This lockres is pending a 128 call to dlm_lock. Only 129 exists with BUSY set. */ 130#define OCFS2_LOCK_UPCONVERT_FINISHING (0x00000800) /* blocks the dc thread 131 * from downconverting 132 * before the upconvert 133 * has completed */ 134 135#define OCFS2_LOCK_NONBLOCK_FINISHED (0x00001000) /* NONBLOCK cluster 136 * lock has already 137 * returned, do not block 138 * dc thread from 139 * downconverting */ 140 141struct ocfs2_lock_res_ops; 142 143typedef void (*ocfs2_lock_callback)(int status, unsigned long data); 144 145#ifdef CONFIG_OCFS2_FS_STATS 146struct ocfs2_lock_stats { 147 u64 ls_total; /* Total wait in NSEC */ 148 u32 ls_gets; /* Num acquires */ 149 u32 ls_fail; /* Num failed acquires */ 150 151 /* Storing max wait in usecs saves 24 bytes per inode */ 152 u32 ls_max; /* Max wait in USEC */ 153 u64 ls_last; /* Last unlock time in USEC */ 154}; 155#endif 156 157struct ocfs2_lock_res { 158 void *l_priv; 159 struct ocfs2_lock_res_ops *l_ops; 160 161 162 struct list_head l_blocked_list; 163 struct list_head l_mask_waiters; 164 struct list_head l_holders; 165 166 unsigned long l_flags; 167 char l_name[OCFS2_LOCK_ID_MAX_LEN]; 168 unsigned int l_ro_holders; 169 unsigned int l_ex_holders; 170 signed char l_level; 171 signed char l_requested; 172 signed char l_blocking; 173 174 /* Data packed - type enum ocfs2_lock_type */ 175 unsigned char l_type; 176 177 /* used from AST/BAST funcs. */ 178 /* Data packed - enum type ocfs2_ast_action */ 179 unsigned char l_action; 180 /* Data packed - enum type ocfs2_unlock_action */ 181 unsigned char l_unlock_action; 182 unsigned int l_pending_gen; 183 184 spinlock_t l_lock; 185 186 struct ocfs2_dlm_lksb l_lksb; 187 188 wait_queue_head_t l_event; 189 190 struct list_head l_debug_list; 191 192#ifdef CONFIG_OCFS2_FS_STATS 193 struct ocfs2_lock_stats l_lock_prmode; /* PR mode stats */ 194 u32 l_lock_refresh; /* Disk refreshes */ 195 u64 l_lock_wait; /* First lock wait time */ 196 struct ocfs2_lock_stats l_lock_exmode; /* EX mode stats */ 197#endif 198#ifdef CONFIG_DEBUG_LOCK_ALLOC 199 struct lockdep_map l_lockdep_map; 200#endif 201}; 202 203enum ocfs2_orphan_reco_type { 204 ORPHAN_NO_NEED_TRUNCATE = 0, 205 ORPHAN_NEED_TRUNCATE, 206}; 207 208enum ocfs2_orphan_scan_state { 209 ORPHAN_SCAN_ACTIVE, 210 ORPHAN_SCAN_INACTIVE 211}; 212 213struct ocfs2_orphan_scan { 214 struct mutex os_lock; 215 struct ocfs2_super *os_osb; 216 struct ocfs2_lock_res os_lockres; /* lock to synchronize scans */ 217 struct delayed_work os_orphan_scan_work; 218 time64_t os_scantime; /* time this node ran the scan */ 219 u32 os_count; /* tracks node specific scans */ 220 u32 os_seqno; /* tracks cluster wide scans */ 221 atomic_t os_state; /* ACTIVE or INACTIVE */ 222}; 223 224struct ocfs2_dlm_debug { 225 struct kref d_refcnt; 226 u32 d_filter_secs; 227 struct list_head d_lockres_tracking; 228}; 229 230enum ocfs2_vol_state 231{ 232 VOLUME_INIT = 0, 233 VOLUME_MOUNTED, 234 VOLUME_MOUNTED_QUOTAS, 235 VOLUME_DISMOUNTED, 236 VOLUME_DISABLED 237}; 238 239struct ocfs2_alloc_stats 240{ 241 atomic_t moves; 242 atomic_t local_data; 243 atomic_t bitmap_data; 244 atomic_t bg_allocs; 245 atomic_t bg_extends; 246}; 247 248enum ocfs2_local_alloc_state 249{ 250 OCFS2_LA_UNUSED = 0, /* Local alloc will never be used for 251 * this mountpoint. */ 252 OCFS2_LA_ENABLED, /* Local alloc is in use. */ 253 OCFS2_LA_THROTTLED, /* Local alloc is in use, but number 254 * of bits has been reduced. */ 255 OCFS2_LA_DISABLED /* Local alloc has temporarily been 256 * disabled. */ 257}; 258 259enum ocfs2_mount_options 260{ 261 OCFS2_MOUNT_HB_LOCAL = 1 << 0, /* Local heartbeat */ 262 OCFS2_MOUNT_BARRIER = 1 << 1, /* Use block barriers */ 263 OCFS2_MOUNT_NOINTR = 1 << 2, /* Don't catch signals */ 264 OCFS2_MOUNT_ERRORS_PANIC = 1 << 3, /* Panic on errors */ 265 OCFS2_MOUNT_DATA_WRITEBACK = 1 << 4, /* No data ordering */ 266 OCFS2_MOUNT_LOCALFLOCKS = 1 << 5, /* No cluster aware user file locks */ 267 OCFS2_MOUNT_NOUSERXATTR = 1 << 6, /* No user xattr */ 268 OCFS2_MOUNT_INODE64 = 1 << 7, /* Allow inode numbers > 2^32 */ 269 OCFS2_MOUNT_POSIX_ACL = 1 << 8, /* Force POSIX access control lists */ 270 OCFS2_MOUNT_NO_POSIX_ACL = 1 << 9, /* Disable POSIX access 271 control lists */ 272 OCFS2_MOUNT_USRQUOTA = 1 << 10, /* We support user quotas */ 273 OCFS2_MOUNT_GRPQUOTA = 1 << 11, /* We support group quotas */ 274 OCFS2_MOUNT_COHERENCY_BUFFERED = 1 << 12, /* Allow concurrent O_DIRECT 275 writes */ 276 OCFS2_MOUNT_HB_NONE = 1 << 13, /* No heartbeat */ 277 OCFS2_MOUNT_HB_GLOBAL = 1 << 14, /* Global heartbeat */ 278 279 OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT = 1 << 15, /* Journal Async Commit */ 280 OCFS2_MOUNT_ERRORS_CONT = 1 << 16, /* Return EIO to the calling process on error */ 281 OCFS2_MOUNT_ERRORS_ROFS = 1 << 17, /* Change filesystem to read-only on error */ 282}; 283 284#define OCFS2_OSB_SOFT_RO 0x0001 285#define OCFS2_OSB_HARD_RO 0x0002 286#define OCFS2_OSB_ERROR_FS 0x0004 287#define OCFS2_DEFAULT_ATIME_QUANTUM 60 288 289struct ocfs2_journal; 290struct ocfs2_slot_info; 291struct ocfs2_recovery_map; 292struct ocfs2_replay_map; 293struct ocfs2_quota_recovery; 294struct ocfs2_super 295{ 296 struct task_struct *commit_task; 297 struct super_block *sb; 298 struct inode *root_inode; 299 struct inode *sys_root_inode; 300 struct inode *global_system_inodes[NUM_GLOBAL_SYSTEM_INODES]; 301 struct inode **local_system_inodes; 302 303 struct ocfs2_slot_info *slot_info; 304 305 u32 *slot_recovery_generations; 306 307 spinlock_t node_map_lock; 308 309 u64 root_blkno; 310 u64 system_dir_blkno; 311 u64 bitmap_blkno; 312 u32 bitmap_cpg; 313 char *uuid_str; 314 u32 uuid_hash; 315 u8 *vol_label; 316 u64 first_cluster_group_blkno; 317 u32 fs_generation; 318 319 u32 s_feature_compat; 320 u32 s_feature_incompat; 321 u32 s_feature_ro_compat; 322 323 /* Protects s_next_generation, osb_flags and s_inode_steal_slot. 324 * Could protect more on osb as it's very short lived. 325 */ 326 spinlock_t osb_lock; 327 u32 s_next_generation; 328 unsigned long osb_flags; 329 u16 s_inode_steal_slot; 330 u16 s_meta_steal_slot; 331 atomic_t s_num_inodes_stolen; 332 atomic_t s_num_meta_stolen; 333 334 unsigned long s_mount_opt; 335 unsigned int s_atime_quantum; 336 337 unsigned int max_slots; 338 unsigned int node_num; 339 int slot_num; 340 int preferred_slot; 341 int s_sectsize_bits; 342 int s_clustersize; 343 int s_clustersize_bits; 344 unsigned int s_xattr_inline_size; 345 346 atomic_t vol_state; 347 struct mutex recovery_lock; 348 struct ocfs2_recovery_map *recovery_map; 349 struct ocfs2_replay_map *replay_map; 350 struct task_struct *recovery_thread_task; 351 int disable_recovery; 352 wait_queue_head_t checkpoint_event; 353 struct ocfs2_journal *journal; 354 unsigned long osb_commit_interval; 355 356 struct delayed_work la_enable_wq; 357 358 /* 359 * Must hold local alloc i_mutex and osb->osb_lock to change 360 * local_alloc_bits. Reads can be done under either lock. 361 */ 362 unsigned int local_alloc_bits; 363 unsigned int local_alloc_default_bits; 364 /* osb_clusters_at_boot can become stale! Do not trust it to 365 * be up to date. */ 366 unsigned int osb_clusters_at_boot; 367 368 enum ocfs2_local_alloc_state local_alloc_state; /* protected 369 * by osb_lock */ 370 371 struct buffer_head *local_alloc_bh; 372 373 u64 la_last_gd; 374 375 struct ocfs2_reservation_map osb_la_resmap; 376 377 unsigned int osb_resv_level; 378 unsigned int osb_dir_resv_level; 379 380 /* Next two fields are for local node slot recovery during 381 * mount. */ 382 struct ocfs2_dinode *local_alloc_copy; 383 struct ocfs2_quota_recovery *quota_rec; 384 385 struct ocfs2_blockcheck_stats osb_ecc_stats; 386 struct ocfs2_alloc_stats alloc_stats; 387 char dev_str[20]; /* "major,minor" of the device */ 388 389 u8 osb_stackflags; 390 391 char osb_cluster_stack[OCFS2_STACK_LABEL_LEN + 1]; 392 char osb_cluster_name[OCFS2_CLUSTER_NAME_LEN + 1]; 393 struct ocfs2_cluster_connection *cconn; 394 struct ocfs2_lock_res osb_super_lockres; 395 struct ocfs2_lock_res osb_rename_lockres; 396 struct ocfs2_lock_res osb_nfs_sync_lockres; 397 struct rw_semaphore nfs_sync_rwlock; 398 struct ocfs2_lock_res osb_trim_fs_lockres; 399 struct mutex obs_trim_fs_mutex; 400 struct ocfs2_dlm_debug *osb_dlm_debug; 401 402 struct dentry *osb_debug_root; 403 404 wait_queue_head_t recovery_event; 405 406 spinlock_t dc_task_lock; 407 struct task_struct *dc_task; 408 wait_queue_head_t dc_event; 409 unsigned long dc_wake_sequence; 410 unsigned long dc_work_sequence; 411 412 /* 413 * Any thread can add locks to the list, but the downconvert 414 * thread is the only one allowed to remove locks. Any change 415 * to this rule requires updating 416 * ocfs2_downconvert_thread_do_work(). 417 */ 418 struct list_head blocked_lock_list; 419 unsigned long blocked_lock_count; 420 421 /* List of dquot structures to drop last reference to */ 422 struct llist_head dquot_drop_list; 423 struct work_struct dquot_drop_work; 424 425 wait_queue_head_t osb_mount_event; 426 427 /* Truncate log info */ 428 struct inode *osb_tl_inode; 429 struct buffer_head *osb_tl_bh; 430 struct delayed_work osb_truncate_log_wq; 431 atomic_t osb_tl_disable; 432 /* 433 * How many clusters in our truncate log. 434 * It must be protected by osb_tl_inode->i_mutex. 435 */ 436 unsigned int truncated_clusters; 437 438 struct ocfs2_node_map osb_recovering_orphan_dirs; 439 unsigned int *osb_orphan_wipes; 440 wait_queue_head_t osb_wipe_event; 441 442 struct ocfs2_orphan_scan osb_orphan_scan; 443 444 /* used to protect metaecc calculation check of xattr. */ 445 spinlock_t osb_xattr_lock; 446 447 unsigned int osb_dx_mask; 448 u32 osb_dx_seed[4]; 449 450 /* the group we used to allocate inodes. */ 451 u64 osb_inode_alloc_group; 452 453 /* rb tree root for refcount lock. */ 454 struct rb_root osb_rf_lock_tree; 455 struct ocfs2_refcount_tree *osb_ref_tree_lru; 456 457 struct mutex system_file_mutex; 458 459 /* 460 * OCFS2 needs to schedule several different types of work which 461 * require cluster locking, disk I/O, recovery waits, etc. Since these 462 * types of work tend to be heavy we avoid using the kernel events 463 * workqueue and schedule on our own. 464 */ 465 struct workqueue_struct *ocfs2_wq; 466 467 /* sysfs directory per partition */ 468 struct kset *osb_dev_kset; 469 470 /* file check related stuff */ 471 struct ocfs2_filecheck_sysfs_entry osb_fc_ent; 472}; 473 474#define OCFS2_SB(sb) ((struct ocfs2_super *)(sb)->s_fs_info) 475 476/* Useful typedef for passing around journal access functions */ 477typedef int (*ocfs2_journal_access_func)(handle_t *handle, 478 struct ocfs2_caching_info *ci, 479 struct buffer_head *bh, int type); 480 481static inline int ocfs2_should_order_data(struct inode *inode) 482{ 483 if (!S_ISREG(inode->i_mode)) 484 return 0; 485 if (OCFS2_SB(inode->i_sb)->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) 486 return 0; 487 return 1; 488} 489 490static inline int ocfs2_sparse_alloc(struct ocfs2_super *osb) 491{ 492 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC) 493 return 1; 494 return 0; 495} 496 497static inline int ocfs2_writes_unwritten_extents(struct ocfs2_super *osb) 498{ 499 /* 500 * Support for sparse files is a pre-requisite 501 */ 502 if (!ocfs2_sparse_alloc(osb)) 503 return 0; 504 505 if (osb->s_feature_ro_compat & OCFS2_FEATURE_RO_COMPAT_UNWRITTEN) 506 return 1; 507 return 0; 508} 509 510static inline int ocfs2_supports_append_dio(struct ocfs2_super *osb) 511{ 512 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_APPEND_DIO) 513 return 1; 514 return 0; 515} 516 517 518static inline int ocfs2_supports_inline_data(struct ocfs2_super *osb) 519{ 520 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INLINE_DATA) 521 return 1; 522 return 0; 523} 524 525static inline int ocfs2_supports_xattr(struct ocfs2_super *osb) 526{ 527 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_XATTR) 528 return 1; 529 return 0; 530} 531 532static inline int ocfs2_meta_ecc(struct ocfs2_super *osb) 533{ 534 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_META_ECC) 535 return 1; 536 return 0; 537} 538 539static inline int ocfs2_supports_indexed_dirs(struct ocfs2_super *osb) 540{ 541 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INDEXED_DIRS) 542 return 1; 543 return 0; 544} 545 546static inline int ocfs2_supports_discontig_bg(struct ocfs2_super *osb) 547{ 548 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_DISCONTIG_BG) 549 return 1; 550 return 0; 551} 552 553static inline unsigned int ocfs2_link_max(struct ocfs2_super *osb) 554{ 555 if (ocfs2_supports_indexed_dirs(osb)) 556 return OCFS2_DX_LINK_MAX; 557 return OCFS2_LINK_MAX; 558} 559 560static inline unsigned int ocfs2_read_links_count(struct ocfs2_dinode *di) 561{ 562 u32 nlink = le16_to_cpu(di->i_links_count); 563 u32 hi = le16_to_cpu(di->i_links_count_hi); 564 565 if (di->i_dyn_features & cpu_to_le16(OCFS2_INDEXED_DIR_FL)) 566 nlink |= (hi << OCFS2_LINKS_HI_SHIFT); 567 568 return nlink; 569} 570 571static inline void ocfs2_set_links_count(struct ocfs2_dinode *di, u32 nlink) 572{ 573 u16 lo, hi; 574 575 lo = nlink; 576 hi = nlink >> OCFS2_LINKS_HI_SHIFT; 577 578 di->i_links_count = cpu_to_le16(lo); 579 di->i_links_count_hi = cpu_to_le16(hi); 580} 581 582static inline void ocfs2_add_links_count(struct ocfs2_dinode *di, int n) 583{ 584 u32 links = ocfs2_read_links_count(di); 585 586 links += n; 587 588 ocfs2_set_links_count(di, links); 589} 590 591static inline int ocfs2_refcount_tree(struct ocfs2_super *osb) 592{ 593 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_REFCOUNT_TREE) 594 return 1; 595 return 0; 596} 597 598/* set / clear functions because cluster events can make these happen 599 * in parallel so we want the transitions to be atomic. this also 600 * means that any future flags osb_flags must be protected by spinlock 601 * too! */ 602static inline void ocfs2_set_osb_flag(struct ocfs2_super *osb, 603 unsigned long flag) 604{ 605 spin_lock(&osb->osb_lock); 606 osb->osb_flags |= flag; 607 spin_unlock(&osb->osb_lock); 608} 609 610static inline void ocfs2_set_ro_flag(struct ocfs2_super *osb, 611 int hard) 612{ 613 spin_lock(&osb->osb_lock); 614 osb->osb_flags &= ~(OCFS2_OSB_SOFT_RO|OCFS2_OSB_HARD_RO); 615 if (hard) 616 osb->osb_flags |= OCFS2_OSB_HARD_RO; 617 else 618 osb->osb_flags |= OCFS2_OSB_SOFT_RO; 619 spin_unlock(&osb->osb_lock); 620} 621 622static inline int ocfs2_is_hard_readonly(struct ocfs2_super *osb) 623{ 624 int ret; 625 626 spin_lock(&osb->osb_lock); 627 ret = osb->osb_flags & OCFS2_OSB_HARD_RO; 628 spin_unlock(&osb->osb_lock); 629 630 return ret; 631} 632 633static inline int ocfs2_is_soft_readonly(struct ocfs2_super *osb) 634{ 635 int ret; 636 637 spin_lock(&osb->osb_lock); 638 ret = osb->osb_flags & OCFS2_OSB_SOFT_RO; 639 spin_unlock(&osb->osb_lock); 640 641 return ret; 642} 643 644static inline int ocfs2_clusterinfo_valid(struct ocfs2_super *osb) 645{ 646 return (osb->s_feature_incompat & 647 (OCFS2_FEATURE_INCOMPAT_USERSPACE_STACK | 648 OCFS2_FEATURE_INCOMPAT_CLUSTERINFO)); 649} 650 651static inline int ocfs2_userspace_stack(struct ocfs2_super *osb) 652{ 653 if (ocfs2_clusterinfo_valid(osb) && 654 memcmp(osb->osb_cluster_stack, OCFS2_CLASSIC_CLUSTER_STACK, 655 OCFS2_STACK_LABEL_LEN)) 656 return 1; 657 return 0; 658} 659 660static inline int ocfs2_o2cb_stack(struct ocfs2_super *osb) 661{ 662 if (ocfs2_clusterinfo_valid(osb) && 663 !memcmp(osb->osb_cluster_stack, OCFS2_CLASSIC_CLUSTER_STACK, 664 OCFS2_STACK_LABEL_LEN)) 665 return 1; 666 return 0; 667} 668 669static inline int ocfs2_cluster_o2cb_global_heartbeat(struct ocfs2_super *osb) 670{ 671 return ocfs2_o2cb_stack(osb) && 672 (osb->osb_stackflags & OCFS2_CLUSTER_O2CB_GLOBAL_HEARTBEAT); 673} 674 675static inline int ocfs2_mount_local(struct ocfs2_super *osb) 676{ 677 return (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT); 678} 679 680static inline int ocfs2_uses_extended_slot_map(struct ocfs2_super *osb) 681{ 682 return (osb->s_feature_incompat & 683 OCFS2_FEATURE_INCOMPAT_EXTENDED_SLOT_MAP); 684} 685 686 687#define OCFS2_IS_VALID_DINODE(ptr) \ 688 (!strcmp((ptr)->i_signature, OCFS2_INODE_SIGNATURE)) 689 690#define OCFS2_IS_VALID_EXTENT_BLOCK(ptr) \ 691 (!strcmp((ptr)->h_signature, OCFS2_EXTENT_BLOCK_SIGNATURE)) 692 693#define OCFS2_IS_VALID_GROUP_DESC(ptr) \ 694 (!strcmp((ptr)->bg_signature, OCFS2_GROUP_DESC_SIGNATURE)) 695 696 697#define OCFS2_IS_VALID_XATTR_BLOCK(ptr) \ 698 (!strcmp((ptr)->xb_signature, OCFS2_XATTR_BLOCK_SIGNATURE)) 699 700#define OCFS2_IS_VALID_DIR_TRAILER(ptr) \ 701 (!strcmp((ptr)->db_signature, OCFS2_DIR_TRAILER_SIGNATURE)) 702 703#define OCFS2_IS_VALID_DX_ROOT(ptr) \ 704 (!strcmp((ptr)->dr_signature, OCFS2_DX_ROOT_SIGNATURE)) 705 706#define OCFS2_IS_VALID_DX_LEAF(ptr) \ 707 (!strcmp((ptr)->dl_signature, OCFS2_DX_LEAF_SIGNATURE)) 708 709#define OCFS2_IS_VALID_REFCOUNT_BLOCK(ptr) \ 710 (!strcmp((ptr)->rf_signature, OCFS2_REFCOUNT_BLOCK_SIGNATURE)) 711 712static inline unsigned long ino_from_blkno(struct super_block *sb, 713 u64 blkno) 714{ 715 return (unsigned long)(blkno & (u64)ULONG_MAX); 716} 717 718static inline u64 ocfs2_clusters_to_blocks(struct super_block *sb, 719 u32 clusters) 720{ 721 int c_to_b_bits = OCFS2_SB(sb)->s_clustersize_bits - 722 sb->s_blocksize_bits; 723 724 return (u64)clusters << c_to_b_bits; 725} 726 727static inline u32 ocfs2_clusters_for_blocks(struct super_block *sb, 728 u64 blocks) 729{ 730 int b_to_c_bits = OCFS2_SB(sb)->s_clustersize_bits - 731 sb->s_blocksize_bits; 732 733 blocks += (1 << b_to_c_bits) - 1; 734 return (u32)(blocks >> b_to_c_bits); 735} 736 737static inline u32 ocfs2_blocks_to_clusters(struct super_block *sb, 738 u64 blocks) 739{ 740 int b_to_c_bits = OCFS2_SB(sb)->s_clustersize_bits - 741 sb->s_blocksize_bits; 742 743 return (u32)(blocks >> b_to_c_bits); 744} 745 746static inline unsigned int ocfs2_clusters_for_bytes(struct super_block *sb, 747 u64 bytes) 748{ 749 int cl_bits = OCFS2_SB(sb)->s_clustersize_bits; 750 unsigned int clusters; 751 752 bytes += OCFS2_SB(sb)->s_clustersize - 1; 753 /* OCFS2 just cannot have enough clusters to overflow this */ 754 clusters = (unsigned int)(bytes >> cl_bits); 755 756 return clusters; 757} 758 759static inline unsigned int ocfs2_bytes_to_clusters(struct super_block *sb, 760 u64 bytes) 761{ 762 int cl_bits = OCFS2_SB(sb)->s_clustersize_bits; 763 unsigned int clusters; 764 765 clusters = (unsigned int)(bytes >> cl_bits); 766 return clusters; 767} 768 769static inline u64 ocfs2_blocks_for_bytes(struct super_block *sb, 770 u64 bytes) 771{ 772 bytes += sb->s_blocksize - 1; 773 return bytes >> sb->s_blocksize_bits; 774} 775 776static inline u64 ocfs2_clusters_to_bytes(struct super_block *sb, 777 u32 clusters) 778{ 779 return (u64)clusters << OCFS2_SB(sb)->s_clustersize_bits; 780} 781 782static inline u64 ocfs2_block_to_cluster_start(struct super_block *sb, 783 u64 blocks) 784{ 785 int bits = OCFS2_SB(sb)->s_clustersize_bits - sb->s_blocksize_bits; 786 unsigned int clusters; 787 788 clusters = ocfs2_blocks_to_clusters(sb, blocks); 789 return (u64)clusters << bits; 790} 791 792static inline u64 ocfs2_align_bytes_to_clusters(struct super_block *sb, 793 u64 bytes) 794{ 795 int cl_bits = OCFS2_SB(sb)->s_clustersize_bits; 796 unsigned int clusters; 797 798 clusters = ocfs2_clusters_for_bytes(sb, bytes); 799 return (u64)clusters << cl_bits; 800} 801 802static inline u64 ocfs2_align_bytes_to_blocks(struct super_block *sb, 803 u64 bytes) 804{ 805 u64 blocks; 806 807 blocks = ocfs2_blocks_for_bytes(sb, bytes); 808 return blocks << sb->s_blocksize_bits; 809} 810 811static inline unsigned long ocfs2_align_bytes_to_sectors(u64 bytes) 812{ 813 return (unsigned long)((bytes + 511) >> 9); 814} 815 816static inline unsigned int ocfs2_page_index_to_clusters(struct super_block *sb, 817 unsigned long pg_index) 818{ 819 u32 clusters = pg_index; 820 unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; 821 822 if (unlikely(PAGE_SHIFT > cbits)) 823 clusters = pg_index << (PAGE_SHIFT - cbits); 824 else if (PAGE_SHIFT < cbits) 825 clusters = pg_index >> (cbits - PAGE_SHIFT); 826 827 return clusters; 828} 829 830/* 831 * Find the 1st page index which covers the given clusters. 832 */ 833static inline pgoff_t ocfs2_align_clusters_to_page_index(struct super_block *sb, 834 u32 clusters) 835{ 836 unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; 837 pgoff_t index = clusters; 838 839 if (PAGE_SHIFT > cbits) { 840 index = (pgoff_t)clusters >> (PAGE_SHIFT - cbits); 841 } else if (PAGE_SHIFT < cbits) { 842 index = (pgoff_t)clusters << (cbits - PAGE_SHIFT); 843 } 844 845 return index; 846} 847 848static inline unsigned int ocfs2_pages_per_cluster(struct super_block *sb) 849{ 850 unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; 851 unsigned int pages_per_cluster = 1; 852 853 if (PAGE_SHIFT < cbits) 854 pages_per_cluster = 1 << (cbits - PAGE_SHIFT); 855 856 return pages_per_cluster; 857} 858 859static inline unsigned int ocfs2_megabytes_to_clusters(struct super_block *sb, 860 unsigned int megs) 861{ 862 BUILD_BUG_ON(OCFS2_MAX_CLUSTERSIZE > 1048576); 863 864 return megs << (20 - OCFS2_SB(sb)->s_clustersize_bits); 865} 866 867static inline unsigned int ocfs2_clusters_to_megabytes(struct super_block *sb, 868 unsigned int clusters) 869{ 870 return clusters >> (20 - OCFS2_SB(sb)->s_clustersize_bits); 871} 872 873static inline void _ocfs2_set_bit(unsigned int bit, unsigned long *bitmap) 874{ 875 __set_bit_le(bit, bitmap); 876} 877#define ocfs2_set_bit(bit, addr) _ocfs2_set_bit((bit), (unsigned long *)(addr)) 878 879static inline void _ocfs2_clear_bit(unsigned int bit, unsigned long *bitmap) 880{ 881 __clear_bit_le(bit, bitmap); 882} 883#define ocfs2_clear_bit(bit, addr) _ocfs2_clear_bit((bit), (unsigned long *)(addr)) 884 885#define ocfs2_test_bit test_bit_le 886#define ocfs2_find_next_zero_bit find_next_zero_bit_le 887#define ocfs2_find_next_bit find_next_bit_le 888 889static inline void *correct_addr_and_bit_unaligned(int *bit, void *addr) 890{ 891#if BITS_PER_LONG == 64 892 *bit += ((unsigned long) addr & 7UL) << 3; 893 addr = (void *) ((unsigned long) addr & ~7UL); 894#elif BITS_PER_LONG == 32 895 *bit += ((unsigned long) addr & 3UL) << 3; 896 addr = (void *) ((unsigned long) addr & ~3UL); 897#else 898#error "how many bits you are?!" 899#endif 900 return addr; 901} 902 903static inline void ocfs2_set_bit_unaligned(int bit, void *bitmap) 904{ 905 bitmap = correct_addr_and_bit_unaligned(&bit, bitmap); 906 ocfs2_set_bit(bit, bitmap); 907} 908 909static inline void ocfs2_clear_bit_unaligned(int bit, void *bitmap) 910{ 911 bitmap = correct_addr_and_bit_unaligned(&bit, bitmap); 912 ocfs2_clear_bit(bit, bitmap); 913} 914 915static inline int ocfs2_test_bit_unaligned(int bit, void *bitmap) 916{ 917 bitmap = correct_addr_and_bit_unaligned(&bit, bitmap); 918 return ocfs2_test_bit(bit, bitmap); 919} 920 921static inline int ocfs2_find_next_zero_bit_unaligned(void *bitmap, int max, 922 int start) 923{ 924 int fix = 0, ret, tmpmax; 925 bitmap = correct_addr_and_bit_unaligned(&fix, bitmap); 926 tmpmax = max + fix; 927 start += fix; 928 929 ret = ocfs2_find_next_zero_bit(bitmap, tmpmax, start) - fix; 930 if (ret > max) 931 return max; 932 return ret; 933} 934 935#endif /* OCFS2_H */ 936 937