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