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 50 enum ocfs2_caching_info_flags { 51 /* Indicates that the metadata cache is using the inline array */ 52 OCFS2_CACHE_FL_INLINE = 1<<1, 53 }; 54 55 struct ocfs2_caching_operations; 56 struct 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 */ 82 struct 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 87 struct ocfs2_node_map { 88 u16 num_nodes; 89 unsigned long map[BITS_TO_LONGS(OCFS2_NODE_MAP_MAX_NODES)]; 90 }; 91 92 enum 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. */ 100 enum 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 */ 138 139 struct ocfs2_lock_res_ops; 140 141 typedef void (*ocfs2_lock_callback)(int status, unsigned long data); 142 143 #ifdef CONFIG_OCFS2_FS_STATS 144 struct 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 154 155 struct ocfs2_lock_res { 156 void *l_priv; 157 const 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 }; 200 201 enum ocfs2_orphan_reco_type { 202 ORPHAN_NO_NEED_TRUNCATE = 0, 203 ORPHAN_NEED_TRUNCATE, 204 }; 205 206 enum ocfs2_orphan_scan_state { 207 ORPHAN_SCAN_ACTIVE, 208 ORPHAN_SCAN_INACTIVE 209 }; 210 211 struct 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 }; 221 222 struct ocfs2_dlm_debug { 223 struct kref d_refcnt; 224 u32 d_filter_secs; 225 struct list_head d_lockres_tracking; 226 }; 227 228 enum ocfs2_vol_state 229 { 230 VOLUME_INIT = 0, 231 VOLUME_MOUNTED, 232 VOLUME_MOUNTED_QUOTAS, 233 VOLUME_DISMOUNTED, 234 VOLUME_DISABLED 235 }; 236 237 struct 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 }; 245 246 enum 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 }; 256 257 enum 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 60 286 287 struct ocfs2_triggers { 288 struct jbd2_buffer_trigger_type ot_triggers; 289 int ot_offset; 290 struct super_block *sb; 291 }; 292 293 enum ocfs2_journal_trigger_type { 294 OCFS2_JTR_DI, 295 OCFS2_JTR_EB, 296 OCFS2_JTR_RB, 297 OCFS2_JTR_GD, 298 OCFS2_JTR_DB, 299 OCFS2_JTR_XB, 300 OCFS2_JTR_DQ, 301 OCFS2_JTR_DR, 302 OCFS2_JTR_DL, 303 OCFS2_JTR_NONE /* This must be the last entry */ 304 }; 305 306 #define OCFS2_JOURNAL_TRIGGER_COUNT OCFS2_JTR_NONE 307 308 void ocfs2_initialize_journal_triggers(struct super_block *sb, 309 struct ocfs2_triggers triggers[]); 310 311 struct ocfs2_journal; 312 struct ocfs2_slot_info; 313 struct ocfs2_recovery_map; 314 struct ocfs2_replay_map; 315 struct ocfs2_quota_recovery; 316 struct ocfs2_super 317 { 318 struct task_struct *commit_task; 319 struct super_block *sb; 320 struct inode *root_inode; 321 struct inode *sys_root_inode; 322 struct inode *global_system_inodes[NUM_GLOBAL_SYSTEM_INODES]; 323 struct inode **local_system_inodes; 324 325 struct ocfs2_slot_info *slot_info; 326 327 u32 *slot_recovery_generations; 328 329 spinlock_t node_map_lock; 330 331 u64 root_blkno; 332 u64 system_dir_blkno; 333 u64 bitmap_blkno; 334 u32 bitmap_cpg; 335 char *uuid_str; 336 u32 uuid_hash; 337 u8 *vol_label; 338 u64 first_cluster_group_blkno; 339 u32 fs_generation; 340 341 u32 s_feature_compat; 342 u32 s_feature_incompat; 343 u32 s_feature_ro_compat; 344 345 /* Protects s_next_generation, osb_flags and s_inode_steal_slot. 346 * Could protect more on osb as it's very short lived. 347 */ 348 spinlock_t osb_lock; 349 u32 s_next_generation; 350 unsigned long osb_flags; 351 u16 s_inode_steal_slot; 352 u16 s_meta_steal_slot; 353 atomic_t s_num_inodes_stolen; 354 atomic_t s_num_meta_stolen; 355 356 unsigned long s_mount_opt; 357 unsigned int s_atime_quantum; 358 359 unsigned int max_slots; 360 unsigned int node_num; 361 int slot_num; 362 int preferred_slot; 363 int s_sectsize_bits; 364 int s_clustersize; 365 int s_clustersize_bits; 366 unsigned int s_xattr_inline_size; 367 368 atomic_t vol_state; 369 struct mutex recovery_lock; 370 struct ocfs2_recovery_map *recovery_map; 371 struct ocfs2_replay_map *replay_map; 372 struct task_struct *recovery_thread_task; 373 int disable_recovery; 374 wait_queue_head_t checkpoint_event; 375 struct ocfs2_journal *journal; 376 unsigned long osb_commit_interval; 377 378 /* Journal triggers for checksum */ 379 struct ocfs2_triggers s_journal_triggers[OCFS2_JOURNAL_TRIGGER_COUNT]; 380 381 struct delayed_work la_enable_wq; 382 383 /* 384 * Must hold local alloc i_rwsem and osb->osb_lock to change 385 * local_alloc_bits. Reads can be done under either lock. 386 */ 387 unsigned int local_alloc_bits; 388 unsigned int local_alloc_default_bits; 389 /* osb_clusters_at_boot can become stale! Do not trust it to 390 * be up to date. */ 391 unsigned int osb_clusters_at_boot; 392 393 enum ocfs2_local_alloc_state local_alloc_state; /* protected 394 * by osb_lock */ 395 396 struct buffer_head *local_alloc_bh; 397 398 u64 la_last_gd; 399 400 struct ocfs2_reservation_map osb_la_resmap; 401 402 unsigned int osb_resv_level; 403 unsigned int osb_dir_resv_level; 404 405 /* Next two fields are for local node slot recovery during 406 * mount. */ 407 struct ocfs2_dinode *local_alloc_copy; 408 struct ocfs2_quota_recovery *quota_rec; 409 410 struct ocfs2_blockcheck_stats osb_ecc_stats; 411 struct ocfs2_alloc_stats alloc_stats; 412 char dev_str[20]; /* "major,minor" of the device */ 413 414 u8 osb_stackflags; 415 416 char osb_cluster_stack[OCFS2_STACK_LABEL_LEN + 1]; 417 char osb_cluster_name[OCFS2_CLUSTER_NAME_LEN + 1]; 418 struct ocfs2_cluster_connection *cconn; 419 struct ocfs2_lock_res osb_super_lockres; 420 struct ocfs2_lock_res osb_rename_lockres; 421 struct ocfs2_lock_res osb_nfs_sync_lockres; 422 struct rw_semaphore nfs_sync_rwlock; 423 struct ocfs2_lock_res osb_trim_fs_lockres; 424 struct mutex obs_trim_fs_mutex; 425 struct ocfs2_dlm_debug *osb_dlm_debug; 426 427 struct dentry *osb_debug_root; 428 429 wait_queue_head_t recovery_event; 430 431 spinlock_t dc_task_lock; 432 struct task_struct *dc_task; 433 wait_queue_head_t dc_event; 434 unsigned long dc_wake_sequence; 435 unsigned long dc_work_sequence; 436 437 /* 438 * Any thread can add locks to the list, but the downconvert 439 * thread is the only one allowed to remove locks. Any change 440 * to this rule requires updating 441 * ocfs2_downconvert_thread_do_work(). 442 */ 443 struct list_head blocked_lock_list; 444 unsigned long blocked_lock_count; 445 446 /* List of dquot structures to drop last reference to */ 447 struct llist_head dquot_drop_list; 448 struct work_struct dquot_drop_work; 449 450 wait_queue_head_t osb_mount_event; 451 452 /* Truncate log info */ 453 struct inode *osb_tl_inode; 454 struct buffer_head *osb_tl_bh; 455 struct delayed_work osb_truncate_log_wq; 456 atomic_t osb_tl_disable; 457 /* 458 * How many clusters in our truncate log. 459 * It must be protected by osb_tl_inode->i_rwsem. 460 */ 461 unsigned int truncated_clusters; 462 463 struct ocfs2_node_map osb_recovering_orphan_dirs; 464 unsigned int *osb_orphan_wipes; 465 wait_queue_head_t osb_wipe_event; 466 467 struct ocfs2_orphan_scan osb_orphan_scan; 468 469 /* used to protect metaecc calculation check of xattr. */ 470 spinlock_t osb_xattr_lock; 471 472 unsigned int osb_dx_mask; 473 u32 osb_dx_seed[4]; 474 475 /* the group we used to allocate inodes. */ 476 u64 osb_inode_alloc_group; 477 478 /* rb tree root for refcount lock. */ 479 struct rb_root osb_rf_lock_tree; 480 struct ocfs2_refcount_tree *osb_ref_tree_lru; 481 482 struct mutex system_file_mutex; 483 484 /* 485 * OCFS2 needs to schedule several different types of work which 486 * require cluster locking, disk I/O, recovery waits, etc. Since these 487 * types of work tend to be heavy we avoid using the kernel events 488 * workqueue and schedule on our own. 489 */ 490 struct workqueue_struct *ocfs2_wq; 491 492 /* sysfs directory per partition */ 493 struct kset *osb_dev_kset; 494 495 /* file check related stuff */ 496 struct ocfs2_filecheck_sysfs_entry osb_fc_ent; 497 }; 498 499 #define OCFS2_SB(sb) ((struct ocfs2_super *)(sb)->s_fs_info) 500 501 /* Useful typedef for passing around journal access functions */ 502 typedef int (*ocfs2_journal_access_func)(handle_t *handle, 503 struct ocfs2_caching_info *ci, 504 struct buffer_head *bh, int type); 505 506 static inline int ocfs2_should_order_data(struct inode *inode) 507 { 508 if (!S_ISREG(inode->i_mode)) 509 return 0; 510 if (OCFS2_SB(inode->i_sb)->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) 511 return 0; 512 return 1; 513 } 514 515 static inline int ocfs2_sparse_alloc(struct ocfs2_super *osb) 516 { 517 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC) 518 return 1; 519 return 0; 520 } 521 522 static inline int ocfs2_writes_unwritten_extents(struct ocfs2_super *osb) 523 { 524 /* 525 * Support for sparse files is a pre-requisite 526 */ 527 if (!ocfs2_sparse_alloc(osb)) 528 return 0; 529 530 if (osb->s_feature_ro_compat & OCFS2_FEATURE_RO_COMPAT_UNWRITTEN) 531 return 1; 532 return 0; 533 } 534 535 static inline int ocfs2_supports_append_dio(struct ocfs2_super *osb) 536 { 537 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_APPEND_DIO) 538 return 1; 539 return 0; 540 } 541 542 543 static inline int ocfs2_supports_inline_data(struct ocfs2_super *osb) 544 { 545 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INLINE_DATA) 546 return 1; 547 return 0; 548 } 549 550 static inline int ocfs2_supports_xattr(struct ocfs2_super *osb) 551 { 552 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_XATTR) 553 return 1; 554 return 0; 555 } 556 557 static inline int ocfs2_meta_ecc(struct ocfs2_super *osb) 558 { 559 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_META_ECC) 560 return 1; 561 return 0; 562 } 563 564 static inline int ocfs2_supports_indexed_dirs(struct ocfs2_super *osb) 565 { 566 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INDEXED_DIRS) 567 return 1; 568 return 0; 569 } 570 571 static inline int ocfs2_supports_discontig_bg(struct ocfs2_super *osb) 572 { 573 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_DISCONTIG_BG) 574 return 1; 575 return 0; 576 } 577 578 static inline unsigned int ocfs2_link_max(struct ocfs2_super *osb) 579 { 580 if (ocfs2_supports_indexed_dirs(osb)) 581 return OCFS2_DX_LINK_MAX; 582 return OCFS2_LINK_MAX; 583 } 584 585 static inline unsigned int ocfs2_read_links_count(struct ocfs2_dinode *di) 586 { 587 u32 nlink = le16_to_cpu(di->i_links_count); 588 u32 hi = le16_to_cpu(di->i_links_count_hi); 589 590 nlink |= (hi << OCFS2_LINKS_HI_SHIFT); 591 592 return nlink; 593 } 594 595 static inline void ocfs2_set_links_count(struct ocfs2_dinode *di, u32 nlink) 596 { 597 u16 lo, hi; 598 599 lo = nlink; 600 hi = nlink >> OCFS2_LINKS_HI_SHIFT; 601 602 di->i_links_count = cpu_to_le16(lo); 603 di->i_links_count_hi = cpu_to_le16(hi); 604 } 605 606 static inline void ocfs2_add_links_count(struct ocfs2_dinode *di, int n) 607 { 608 u32 links = ocfs2_read_links_count(di); 609 610 links += n; 611 612 ocfs2_set_links_count(di, links); 613 } 614 615 static inline int ocfs2_refcount_tree(struct ocfs2_super *osb) 616 { 617 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_REFCOUNT_TREE) 618 return 1; 619 return 0; 620 } 621 622 /* set / clear functions because cluster events can make these happen 623 * in parallel so we want the transitions to be atomic. this also 624 * means that any future flags osb_flags must be protected by spinlock 625 * too! */ 626 static inline void ocfs2_set_osb_flag(struct ocfs2_super *osb, 627 unsigned long flag) 628 { 629 spin_lock(&osb->osb_lock); 630 osb->osb_flags |= flag; 631 spin_unlock(&osb->osb_lock); 632 } 633 634 static inline void ocfs2_set_ro_flag(struct ocfs2_super *osb, 635 int hard) 636 { 637 spin_lock(&osb->osb_lock); 638 osb->osb_flags &= ~(OCFS2_OSB_SOFT_RO|OCFS2_OSB_HARD_RO); 639 if (hard) 640 osb->osb_flags |= OCFS2_OSB_HARD_RO; 641 else 642 osb->osb_flags |= OCFS2_OSB_SOFT_RO; 643 spin_unlock(&osb->osb_lock); 644 } 645 646 static inline int ocfs2_is_hard_readonly(struct ocfs2_super *osb) 647 { 648 int ret; 649 650 spin_lock(&osb->osb_lock); 651 ret = osb->osb_flags & OCFS2_OSB_HARD_RO; 652 spin_unlock(&osb->osb_lock); 653 654 return ret; 655 } 656 657 static inline int ocfs2_is_soft_readonly(struct ocfs2_super *osb) 658 { 659 int ret; 660 661 spin_lock(&osb->osb_lock); 662 ret = osb->osb_flags & OCFS2_OSB_SOFT_RO; 663 spin_unlock(&osb->osb_lock); 664 665 return ret; 666 } 667 668 static inline int ocfs2_clusterinfo_valid(struct ocfs2_super *osb) 669 { 670 return (osb->s_feature_incompat & 671 (OCFS2_FEATURE_INCOMPAT_USERSPACE_STACK | 672 OCFS2_FEATURE_INCOMPAT_CLUSTERINFO)); 673 } 674 675 static inline int ocfs2_userspace_stack(struct ocfs2_super *osb) 676 { 677 if (ocfs2_clusterinfo_valid(osb) && 678 memcmp(osb->osb_cluster_stack, OCFS2_CLASSIC_CLUSTER_STACK, 679 OCFS2_STACK_LABEL_LEN)) 680 return 1; 681 return 0; 682 } 683 684 static inline int ocfs2_o2cb_stack(struct ocfs2_super *osb) 685 { 686 if (ocfs2_clusterinfo_valid(osb) && 687 !memcmp(osb->osb_cluster_stack, OCFS2_CLASSIC_CLUSTER_STACK, 688 OCFS2_STACK_LABEL_LEN)) 689 return 1; 690 return 0; 691 } 692 693 static inline int ocfs2_cluster_o2cb_global_heartbeat(struct ocfs2_super *osb) 694 { 695 return ocfs2_o2cb_stack(osb) && 696 (osb->osb_stackflags & OCFS2_CLUSTER_O2CB_GLOBAL_HEARTBEAT); 697 } 698 699 static inline int ocfs2_mount_local(struct ocfs2_super *osb) 700 { 701 return (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT); 702 } 703 704 static inline int ocfs2_uses_extended_slot_map(struct ocfs2_super *osb) 705 { 706 return (osb->s_feature_incompat & 707 OCFS2_FEATURE_INCOMPAT_EXTENDED_SLOT_MAP); 708 } 709 710 711 #define OCFS2_IS_VALID_DINODE(ptr) \ 712 (!strcmp((ptr)->i_signature, OCFS2_INODE_SIGNATURE)) 713 714 #define OCFS2_IS_VALID_EXTENT_BLOCK(ptr) \ 715 (!strcmp((ptr)->h_signature, OCFS2_EXTENT_BLOCK_SIGNATURE)) 716 717 #define OCFS2_IS_VALID_GROUP_DESC(ptr) \ 718 (!strcmp((ptr)->bg_signature, OCFS2_GROUP_DESC_SIGNATURE)) 719 720 721 #define OCFS2_IS_VALID_XATTR_BLOCK(ptr) \ 722 (!strcmp((ptr)->xb_signature, OCFS2_XATTR_BLOCK_SIGNATURE)) 723 724 #define OCFS2_IS_VALID_DIR_TRAILER(ptr) \ 725 (!strcmp((ptr)->db_signature, OCFS2_DIR_TRAILER_SIGNATURE)) 726 727 #define OCFS2_IS_VALID_DX_ROOT(ptr) \ 728 (!strcmp((ptr)->dr_signature, OCFS2_DX_ROOT_SIGNATURE)) 729 730 #define OCFS2_IS_VALID_DX_LEAF(ptr) \ 731 (!strcmp((ptr)->dl_signature, OCFS2_DX_LEAF_SIGNATURE)) 732 733 #define OCFS2_IS_VALID_REFCOUNT_BLOCK(ptr) \ 734 (!strcmp((ptr)->rf_signature, OCFS2_REFCOUNT_BLOCK_SIGNATURE)) 735 736 static inline unsigned long ino_from_blkno(struct super_block *sb, 737 u64 blkno) 738 { 739 return (unsigned long)(blkno & (u64)ULONG_MAX); 740 } 741 742 static inline u64 ocfs2_clusters_to_blocks(struct super_block *sb, 743 u32 clusters) 744 { 745 int c_to_b_bits = OCFS2_SB(sb)->s_clustersize_bits - 746 sb->s_blocksize_bits; 747 748 return (u64)clusters << c_to_b_bits; 749 } 750 751 static inline u32 ocfs2_clusters_for_blocks(struct super_block *sb, 752 u64 blocks) 753 { 754 int b_to_c_bits = OCFS2_SB(sb)->s_clustersize_bits - 755 sb->s_blocksize_bits; 756 757 blocks += (1 << b_to_c_bits) - 1; 758 return (u32)(blocks >> b_to_c_bits); 759 } 760 761 static inline u32 ocfs2_blocks_to_clusters(struct super_block *sb, 762 u64 blocks) 763 { 764 int b_to_c_bits = OCFS2_SB(sb)->s_clustersize_bits - 765 sb->s_blocksize_bits; 766 767 return (u32)(blocks >> b_to_c_bits); 768 } 769 770 static inline unsigned int ocfs2_clusters_for_bytes(struct super_block *sb, 771 u64 bytes) 772 { 773 int cl_bits = OCFS2_SB(sb)->s_clustersize_bits; 774 unsigned int clusters; 775 776 bytes += OCFS2_SB(sb)->s_clustersize - 1; 777 /* OCFS2 just cannot have enough clusters to overflow this */ 778 clusters = (unsigned int)(bytes >> cl_bits); 779 780 return clusters; 781 } 782 783 static inline unsigned int ocfs2_bytes_to_clusters(struct super_block *sb, 784 u64 bytes) 785 { 786 int cl_bits = OCFS2_SB(sb)->s_clustersize_bits; 787 unsigned int clusters; 788 789 clusters = (unsigned int)(bytes >> cl_bits); 790 return clusters; 791 } 792 793 static inline u64 ocfs2_blocks_for_bytes(struct super_block *sb, 794 u64 bytes) 795 { 796 bytes += sb->s_blocksize - 1; 797 return bytes >> sb->s_blocksize_bits; 798 } 799 800 static inline u64 ocfs2_clusters_to_bytes(struct super_block *sb, 801 u32 clusters) 802 { 803 return (u64)clusters << OCFS2_SB(sb)->s_clustersize_bits; 804 } 805 806 static inline u64 ocfs2_block_to_cluster_start(struct super_block *sb, 807 u64 blocks) 808 { 809 int bits = OCFS2_SB(sb)->s_clustersize_bits - sb->s_blocksize_bits; 810 unsigned int clusters; 811 812 clusters = ocfs2_blocks_to_clusters(sb, blocks); 813 return (u64)clusters << bits; 814 } 815 816 static inline u64 ocfs2_align_bytes_to_clusters(struct super_block *sb, 817 u64 bytes) 818 { 819 int cl_bits = OCFS2_SB(sb)->s_clustersize_bits; 820 unsigned int clusters; 821 822 clusters = ocfs2_clusters_for_bytes(sb, bytes); 823 return (u64)clusters << cl_bits; 824 } 825 826 static inline u64 ocfs2_align_bytes_to_blocks(struct super_block *sb, 827 u64 bytes) 828 { 829 u64 blocks; 830 831 blocks = ocfs2_blocks_for_bytes(sb, bytes); 832 return blocks << sb->s_blocksize_bits; 833 } 834 835 static inline unsigned long ocfs2_align_bytes_to_sectors(u64 bytes) 836 { 837 return (unsigned long)((bytes + 511) >> 9); 838 } 839 840 static inline unsigned int ocfs2_page_index_to_clusters(struct super_block *sb, 841 unsigned long pg_index) 842 { 843 u32 clusters = pg_index; 844 unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; 845 846 if (unlikely(PAGE_SHIFT > cbits)) 847 clusters = pg_index << (PAGE_SHIFT - cbits); 848 else if (PAGE_SHIFT < cbits) 849 clusters = pg_index >> (cbits - PAGE_SHIFT); 850 851 return clusters; 852 } 853 854 /* 855 * Find the 1st page index which covers the given clusters. 856 */ 857 static inline pgoff_t ocfs2_align_clusters_to_page_index(struct super_block *sb, 858 u32 clusters) 859 { 860 unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; 861 pgoff_t index = clusters; 862 863 if (PAGE_SHIFT > cbits) { 864 index = (pgoff_t)clusters >> (PAGE_SHIFT - cbits); 865 } else if (PAGE_SHIFT < cbits) { 866 index = (pgoff_t)clusters << (cbits - PAGE_SHIFT); 867 } 868 869 return index; 870 } 871 872 static inline unsigned int ocfs2_pages_per_cluster(struct super_block *sb) 873 { 874 unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; 875 unsigned int pages_per_cluster = 1; 876 877 if (PAGE_SHIFT < cbits) 878 pages_per_cluster = 1 << (cbits - PAGE_SHIFT); 879 880 return pages_per_cluster; 881 } 882 883 static inline unsigned int ocfs2_megabytes_to_clusters(struct super_block *sb, 884 unsigned int megs) 885 { 886 BUILD_BUG_ON(OCFS2_MAX_CLUSTERSIZE > 1048576); 887 888 return megs << (20 - OCFS2_SB(sb)->s_clustersize_bits); 889 } 890 891 static inline unsigned int ocfs2_clusters_to_megabytes(struct super_block *sb, 892 unsigned int clusters) 893 { 894 return clusters >> (20 - OCFS2_SB(sb)->s_clustersize_bits); 895 } 896 897 static inline void _ocfs2_set_bit(unsigned int bit, unsigned long *bitmap) 898 { 899 __set_bit_le(bit, bitmap); 900 } 901 #define ocfs2_set_bit(bit, addr) _ocfs2_set_bit((bit), (unsigned long *)(addr)) 902 903 static inline void _ocfs2_clear_bit(unsigned int bit, unsigned long *bitmap) 904 { 905 __clear_bit_le(bit, bitmap); 906 } 907 #define ocfs2_clear_bit(bit, addr) _ocfs2_clear_bit((bit), (unsigned long *)(addr)) 908 909 #define ocfs2_test_bit test_bit_le 910 #define ocfs2_find_next_zero_bit find_next_zero_bit_le 911 #define ocfs2_find_next_bit find_next_bit_le 912 913 static inline void *correct_addr_and_bit_unaligned(int *bit, void *addr) 914 { 915 #if BITS_PER_LONG == 64 916 *bit += ((unsigned long) addr & 7UL) << 3; 917 addr = (void *) ((unsigned long) addr & ~7UL); 918 #elif BITS_PER_LONG == 32 919 *bit += ((unsigned long) addr & 3UL) << 3; 920 addr = (void *) ((unsigned long) addr & ~3UL); 921 #else 922 #error "how many bits you are?!" 923 #endif 924 return addr; 925 } 926 927 static inline void ocfs2_set_bit_unaligned(int bit, void *bitmap) 928 { 929 bitmap = correct_addr_and_bit_unaligned(&bit, bitmap); 930 ocfs2_set_bit(bit, bitmap); 931 } 932 933 static inline void ocfs2_clear_bit_unaligned(int bit, void *bitmap) 934 { 935 bitmap = correct_addr_and_bit_unaligned(&bit, bitmap); 936 ocfs2_clear_bit(bit, bitmap); 937 } 938 939 static inline int ocfs2_test_bit_unaligned(int bit, void *bitmap) 940 { 941 bitmap = correct_addr_and_bit_unaligned(&bit, bitmap); 942 return ocfs2_test_bit(bit, bitmap); 943 } 944 945 static inline int ocfs2_find_next_zero_bit_unaligned(void *bitmap, int max, 946 int start) 947 { 948 int fix = 0, ret, tmpmax; 949 bitmap = correct_addr_and_bit_unaligned(&fix, bitmap); 950 tmpmax = max + fix; 951 start += fix; 952 953 ret = ocfs2_find_next_zero_bit(bitmap, tmpmax, start) - fix; 954 if (ret > max) 955 return max; 956 return ret; 957 } 958 959 #endif /* OCFS2_H */ 960 961