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 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 OCFS2_MOUNT_NOCLUSTER = 1 << 18, /* No cluster aware filesystem mount */ 281 }; 282 283 #define OCFS2_OSB_SOFT_RO 0x0001 284 #define OCFS2_OSB_HARD_RO 0x0002 285 #define OCFS2_OSB_ERROR_FS 0x0004 286 #define OCFS2_DEFAULT_ATIME_QUANTUM 60 287 288 struct ocfs2_journal; 289 struct ocfs2_slot_info; 290 struct ocfs2_recovery_map; 291 struct ocfs2_replay_map; 292 struct ocfs2_quota_recovery; 293 struct ocfs2_super 294 { 295 struct task_struct *commit_task; 296 struct super_block *sb; 297 struct inode *root_inode; 298 struct inode *sys_root_inode; 299 struct inode *global_system_inodes[NUM_GLOBAL_SYSTEM_INODES]; 300 struct inode **local_system_inodes; 301 302 struct ocfs2_slot_info *slot_info; 303 304 u32 *slot_recovery_generations; 305 306 spinlock_t node_map_lock; 307 308 u64 root_blkno; 309 u64 system_dir_blkno; 310 u64 bitmap_blkno; 311 u32 bitmap_cpg; 312 char *uuid_str; 313 u32 uuid_hash; 314 u8 *vol_label; 315 u64 first_cluster_group_blkno; 316 u32 fs_generation; 317 318 u32 s_feature_compat; 319 u32 s_feature_incompat; 320 u32 s_feature_ro_compat; 321 322 /* Protects s_next_generation, osb_flags and s_inode_steal_slot. 323 * Could protect more on osb as it's very short lived. 324 */ 325 spinlock_t osb_lock; 326 u32 s_next_generation; 327 unsigned long osb_flags; 328 u16 s_inode_steal_slot; 329 u16 s_meta_steal_slot; 330 atomic_t s_num_inodes_stolen; 331 atomic_t s_num_meta_stolen; 332 333 unsigned long s_mount_opt; 334 unsigned int s_atime_quantum; 335 336 unsigned int max_slots; 337 unsigned int node_num; 338 int slot_num; 339 int preferred_slot; 340 int s_sectsize_bits; 341 int s_clustersize; 342 int s_clustersize_bits; 343 unsigned int s_xattr_inline_size; 344 345 atomic_t vol_state; 346 struct mutex recovery_lock; 347 struct ocfs2_recovery_map *recovery_map; 348 struct ocfs2_replay_map *replay_map; 349 struct task_struct *recovery_thread_task; 350 int disable_recovery; 351 wait_queue_head_t checkpoint_event; 352 struct ocfs2_journal *journal; 353 unsigned long osb_commit_interval; 354 355 struct delayed_work la_enable_wq; 356 357 /* 358 * Must hold local alloc i_mutex and osb->osb_lock to change 359 * local_alloc_bits. Reads can be done under either lock. 360 */ 361 unsigned int local_alloc_bits; 362 unsigned int local_alloc_default_bits; 363 /* osb_clusters_at_boot can become stale! Do not trust it to 364 * be up to date. */ 365 unsigned int osb_clusters_at_boot; 366 367 enum ocfs2_local_alloc_state local_alloc_state; /* protected 368 * by osb_lock */ 369 370 struct buffer_head *local_alloc_bh; 371 372 u64 la_last_gd; 373 374 struct ocfs2_reservation_map osb_la_resmap; 375 376 unsigned int osb_resv_level; 377 unsigned int osb_dir_resv_level; 378 379 /* Next two fields are for local node slot recovery during 380 * mount. */ 381 struct ocfs2_dinode *local_alloc_copy; 382 struct ocfs2_quota_recovery *quota_rec; 383 384 struct ocfs2_blockcheck_stats osb_ecc_stats; 385 struct ocfs2_alloc_stats alloc_stats; 386 char dev_str[20]; /* "major,minor" of the device */ 387 388 u8 osb_stackflags; 389 390 char osb_cluster_stack[OCFS2_STACK_LABEL_LEN + 1]; 391 char osb_cluster_name[OCFS2_CLUSTER_NAME_LEN + 1]; 392 struct ocfs2_cluster_connection *cconn; 393 struct ocfs2_lock_res osb_super_lockres; 394 struct ocfs2_lock_res osb_rename_lockres; 395 struct ocfs2_lock_res osb_nfs_sync_lockres; 396 struct rw_semaphore nfs_sync_rwlock; 397 struct ocfs2_lock_res osb_trim_fs_lockres; 398 struct mutex obs_trim_fs_mutex; 399 struct ocfs2_dlm_debug *osb_dlm_debug; 400 401 struct dentry *osb_debug_root; 402 403 wait_queue_head_t recovery_event; 404 405 spinlock_t dc_task_lock; 406 struct task_struct *dc_task; 407 wait_queue_head_t dc_event; 408 unsigned long dc_wake_sequence; 409 unsigned long dc_work_sequence; 410 411 /* 412 * Any thread can add locks to the list, but the downconvert 413 * thread is the only one allowed to remove locks. Any change 414 * to this rule requires updating 415 * ocfs2_downconvert_thread_do_work(). 416 */ 417 struct list_head blocked_lock_list; 418 unsigned long blocked_lock_count; 419 420 /* List of dquot structures to drop last reference to */ 421 struct llist_head dquot_drop_list; 422 struct work_struct dquot_drop_work; 423 424 wait_queue_head_t osb_mount_event; 425 426 /* Truncate log info */ 427 struct inode *osb_tl_inode; 428 struct buffer_head *osb_tl_bh; 429 struct delayed_work osb_truncate_log_wq; 430 atomic_t osb_tl_disable; 431 /* 432 * How many clusters in our truncate log. 433 * It must be protected by osb_tl_inode->i_mutex. 434 */ 435 unsigned int truncated_clusters; 436 437 struct ocfs2_node_map osb_recovering_orphan_dirs; 438 unsigned int *osb_orphan_wipes; 439 wait_queue_head_t osb_wipe_event; 440 441 struct ocfs2_orphan_scan osb_orphan_scan; 442 443 /* used to protect metaecc calculation check of xattr. */ 444 spinlock_t osb_xattr_lock; 445 446 unsigned int osb_dx_mask; 447 u32 osb_dx_seed[4]; 448 449 /* the group we used to allocate inodes. */ 450 u64 osb_inode_alloc_group; 451 452 /* rb tree root for refcount lock. */ 453 struct rb_root osb_rf_lock_tree; 454 struct ocfs2_refcount_tree *osb_ref_tree_lru; 455 456 struct mutex system_file_mutex; 457 458 /* 459 * OCFS2 needs to schedule several different types of work which 460 * require cluster locking, disk I/O, recovery waits, etc. Since these 461 * types of work tend to be heavy we avoid using the kernel events 462 * workqueue and schedule on our own. 463 */ 464 struct workqueue_struct *ocfs2_wq; 465 466 /* sysfs directory per partition */ 467 struct kset *osb_dev_kset; 468 469 /* file check related stuff */ 470 struct ocfs2_filecheck_sysfs_entry osb_fc_ent; 471 }; 472 473 #define OCFS2_SB(sb) ((struct ocfs2_super *)(sb)->s_fs_info) 474 475 /* Useful typedef for passing around journal access functions */ 476 typedef int (*ocfs2_journal_access_func)(handle_t *handle, 477 struct ocfs2_caching_info *ci, 478 struct buffer_head *bh, int type); 479 480 static inline int ocfs2_should_order_data(struct inode *inode) 481 { 482 if (!S_ISREG(inode->i_mode)) 483 return 0; 484 if (OCFS2_SB(inode->i_sb)->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) 485 return 0; 486 return 1; 487 } 488 489 static inline int ocfs2_sparse_alloc(struct ocfs2_super *osb) 490 { 491 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC) 492 return 1; 493 return 0; 494 } 495 496 static inline int ocfs2_writes_unwritten_extents(struct ocfs2_super *osb) 497 { 498 /* 499 * Support for sparse files is a pre-requisite 500 */ 501 if (!ocfs2_sparse_alloc(osb)) 502 return 0; 503 504 if (osb->s_feature_ro_compat & OCFS2_FEATURE_RO_COMPAT_UNWRITTEN) 505 return 1; 506 return 0; 507 } 508 509 static inline int ocfs2_supports_append_dio(struct ocfs2_super *osb) 510 { 511 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_APPEND_DIO) 512 return 1; 513 return 0; 514 } 515 516 517 static inline int ocfs2_supports_inline_data(struct ocfs2_super *osb) 518 { 519 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INLINE_DATA) 520 return 1; 521 return 0; 522 } 523 524 static inline int ocfs2_supports_xattr(struct ocfs2_super *osb) 525 { 526 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_XATTR) 527 return 1; 528 return 0; 529 } 530 531 static inline int ocfs2_meta_ecc(struct ocfs2_super *osb) 532 { 533 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_META_ECC) 534 return 1; 535 return 0; 536 } 537 538 static inline int ocfs2_supports_indexed_dirs(struct ocfs2_super *osb) 539 { 540 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INDEXED_DIRS) 541 return 1; 542 return 0; 543 } 544 545 static inline int ocfs2_supports_discontig_bg(struct ocfs2_super *osb) 546 { 547 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_DISCONTIG_BG) 548 return 1; 549 return 0; 550 } 551 552 static inline unsigned int ocfs2_link_max(struct ocfs2_super *osb) 553 { 554 if (ocfs2_supports_indexed_dirs(osb)) 555 return OCFS2_DX_LINK_MAX; 556 return OCFS2_LINK_MAX; 557 } 558 559 static inline unsigned int ocfs2_read_links_count(struct ocfs2_dinode *di) 560 { 561 u32 nlink = le16_to_cpu(di->i_links_count); 562 u32 hi = le16_to_cpu(di->i_links_count_hi); 563 564 if (di->i_dyn_features & cpu_to_le16(OCFS2_INDEXED_DIR_FL)) 565 nlink |= (hi << OCFS2_LINKS_HI_SHIFT); 566 567 return nlink; 568 } 569 570 static inline void ocfs2_set_links_count(struct ocfs2_dinode *di, u32 nlink) 571 { 572 u16 lo, hi; 573 574 lo = nlink; 575 hi = nlink >> OCFS2_LINKS_HI_SHIFT; 576 577 di->i_links_count = cpu_to_le16(lo); 578 di->i_links_count_hi = cpu_to_le16(hi); 579 } 580 581 static inline void ocfs2_add_links_count(struct ocfs2_dinode *di, int n) 582 { 583 u32 links = ocfs2_read_links_count(di); 584 585 links += n; 586 587 ocfs2_set_links_count(di, links); 588 } 589 590 static inline int ocfs2_refcount_tree(struct ocfs2_super *osb) 591 { 592 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_REFCOUNT_TREE) 593 return 1; 594 return 0; 595 } 596 597 /* set / clear functions because cluster events can make these happen 598 * in parallel so we want the transitions to be atomic. this also 599 * means that any future flags osb_flags must be protected by spinlock 600 * too! */ 601 static inline void ocfs2_set_osb_flag(struct ocfs2_super *osb, 602 unsigned long flag) 603 { 604 spin_lock(&osb->osb_lock); 605 osb->osb_flags |= flag; 606 spin_unlock(&osb->osb_lock); 607 } 608 609 static inline void ocfs2_set_ro_flag(struct ocfs2_super *osb, 610 int hard) 611 { 612 spin_lock(&osb->osb_lock); 613 osb->osb_flags &= ~(OCFS2_OSB_SOFT_RO|OCFS2_OSB_HARD_RO); 614 if (hard) 615 osb->osb_flags |= OCFS2_OSB_HARD_RO; 616 else 617 osb->osb_flags |= OCFS2_OSB_SOFT_RO; 618 spin_unlock(&osb->osb_lock); 619 } 620 621 static inline int ocfs2_is_hard_readonly(struct ocfs2_super *osb) 622 { 623 int ret; 624 625 spin_lock(&osb->osb_lock); 626 ret = osb->osb_flags & OCFS2_OSB_HARD_RO; 627 spin_unlock(&osb->osb_lock); 628 629 return ret; 630 } 631 632 static inline int ocfs2_is_soft_readonly(struct ocfs2_super *osb) 633 { 634 int ret; 635 636 spin_lock(&osb->osb_lock); 637 ret = osb->osb_flags & OCFS2_OSB_SOFT_RO; 638 spin_unlock(&osb->osb_lock); 639 640 return ret; 641 } 642 643 static inline int ocfs2_clusterinfo_valid(struct ocfs2_super *osb) 644 { 645 return (osb->s_feature_incompat & 646 (OCFS2_FEATURE_INCOMPAT_USERSPACE_STACK | 647 OCFS2_FEATURE_INCOMPAT_CLUSTERINFO)); 648 } 649 650 static inline int ocfs2_userspace_stack(struct ocfs2_super *osb) 651 { 652 if (ocfs2_clusterinfo_valid(osb) && 653 memcmp(osb->osb_cluster_stack, OCFS2_CLASSIC_CLUSTER_STACK, 654 OCFS2_STACK_LABEL_LEN)) 655 return 1; 656 return 0; 657 } 658 659 static inline int ocfs2_o2cb_stack(struct ocfs2_super *osb) 660 { 661 if (ocfs2_clusterinfo_valid(osb) && 662 !memcmp(osb->osb_cluster_stack, OCFS2_CLASSIC_CLUSTER_STACK, 663 OCFS2_STACK_LABEL_LEN)) 664 return 1; 665 return 0; 666 } 667 668 static inline int ocfs2_cluster_o2cb_global_heartbeat(struct ocfs2_super *osb) 669 { 670 return ocfs2_o2cb_stack(osb) && 671 (osb->osb_stackflags & OCFS2_CLUSTER_O2CB_GLOBAL_HEARTBEAT); 672 } 673 674 static inline int ocfs2_mount_local(struct ocfs2_super *osb) 675 { 676 return ((osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT) 677 || (osb->s_mount_opt & OCFS2_MOUNT_NOCLUSTER)); 678 } 679 680 static 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)) 711 712 static inline unsigned long ino_from_blkno(struct super_block *sb, 713 u64 blkno) 714 { 715 return (unsigned long)(blkno & (u64)ULONG_MAX); 716 } 717 718 static 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 } 726 727 static 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 } 736 737 static 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 } 745 746 static 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 } 758 759 static 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 } 768 769 static 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 } 775 776 static 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 } 781 782 static 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 } 791 792 static 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 } 801 802 static 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 } 810 811 static inline unsigned long ocfs2_align_bytes_to_sectors(u64 bytes) 812 { 813 return (unsigned long)((bytes + 511) >> 9); 814 } 815 816 static 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 */ 833 static 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 } 847 848 static 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 } 858 859 static 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 } 866 867 static 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 } 872 873 static 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)) 878 879 static 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 888 889 static 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 } 902 903 static 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 } 908 909 static 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 } 914 915 static 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 } 920 921 static 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