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 52 enum ocfs2_caching_info_flags { 53 /* Indicates that the metadata cache is using the inline array */ 54 OCFS2_CACHE_FL_INLINE = 1<<1, 55 }; 56 57 struct ocfs2_caching_operations; 58 struct 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 */ 84 struct 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 89 struct ocfs2_node_map { 90 u16 num_nodes; 91 unsigned long map[BITS_TO_LONGS(OCFS2_NODE_MAP_MAX_NODES)]; 92 }; 93 94 enum 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. */ 102 enum 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 */ 140 141 struct ocfs2_lock_res_ops; 142 143 typedef void (*ocfs2_lock_callback)(int status, unsigned long data); 144 145 #ifdef CONFIG_OCFS2_FS_STATS 146 struct 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 156 157 struct 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 }; 202 203 enum ocfs2_orphan_reco_type { 204 ORPHAN_NO_NEED_TRUNCATE = 0, 205 ORPHAN_NEED_TRUNCATE, 206 }; 207 208 enum ocfs2_orphan_scan_state { 209 ORPHAN_SCAN_ACTIVE, 210 ORPHAN_SCAN_INACTIVE 211 }; 212 213 struct 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 }; 223 224 struct ocfs2_dlm_debug { 225 struct kref d_refcnt; 226 struct dentry *d_locking_state; 227 struct dentry *d_locking_filter; 228 u32 d_filter_secs; 229 struct list_head d_lockres_tracking; 230 }; 231 232 enum ocfs2_vol_state 233 { 234 VOLUME_INIT = 0, 235 VOLUME_MOUNTED, 236 VOLUME_MOUNTED_QUOTAS, 237 VOLUME_DISMOUNTED, 238 VOLUME_DISABLED 239 }; 240 241 struct ocfs2_alloc_stats 242 { 243 atomic_t moves; 244 atomic_t local_data; 245 atomic_t bitmap_data; 246 atomic_t bg_allocs; 247 atomic_t bg_extends; 248 }; 249 250 enum ocfs2_local_alloc_state 251 { 252 OCFS2_LA_UNUSED = 0, /* Local alloc will never be used for 253 * this mountpoint. */ 254 OCFS2_LA_ENABLED, /* Local alloc is in use. */ 255 OCFS2_LA_THROTTLED, /* Local alloc is in use, but number 256 * of bits has been reduced. */ 257 OCFS2_LA_DISABLED /* Local alloc has temporarily been 258 * disabled. */ 259 }; 260 261 enum ocfs2_mount_options 262 { 263 OCFS2_MOUNT_HB_LOCAL = 1 << 0, /* Local heartbeat */ 264 OCFS2_MOUNT_BARRIER = 1 << 1, /* Use block barriers */ 265 OCFS2_MOUNT_NOINTR = 1 << 2, /* Don't catch signals */ 266 OCFS2_MOUNT_ERRORS_PANIC = 1 << 3, /* Panic on errors */ 267 OCFS2_MOUNT_DATA_WRITEBACK = 1 << 4, /* No data ordering */ 268 OCFS2_MOUNT_LOCALFLOCKS = 1 << 5, /* No cluster aware user file locks */ 269 OCFS2_MOUNT_NOUSERXATTR = 1 << 6, /* No user xattr */ 270 OCFS2_MOUNT_INODE64 = 1 << 7, /* Allow inode numbers > 2^32 */ 271 OCFS2_MOUNT_POSIX_ACL = 1 << 8, /* Force POSIX access control lists */ 272 OCFS2_MOUNT_NO_POSIX_ACL = 1 << 9, /* Disable POSIX access 273 control lists */ 274 OCFS2_MOUNT_USRQUOTA = 1 << 10, /* We support user quotas */ 275 OCFS2_MOUNT_GRPQUOTA = 1 << 11, /* We support group quotas */ 276 OCFS2_MOUNT_COHERENCY_BUFFERED = 1 << 12, /* Allow concurrent O_DIRECT 277 writes */ 278 OCFS2_MOUNT_HB_NONE = 1 << 13, /* No heartbeat */ 279 OCFS2_MOUNT_HB_GLOBAL = 1 << 14, /* Global heartbeat */ 280 281 OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT = 1 << 15, /* Journal Async Commit */ 282 OCFS2_MOUNT_ERRORS_CONT = 1 << 16, /* Return EIO to the calling process on error */ 283 OCFS2_MOUNT_ERRORS_ROFS = 1 << 17, /* Change filesystem to read-only on error */ 284 }; 285 286 #define OCFS2_OSB_SOFT_RO 0x0001 287 #define OCFS2_OSB_HARD_RO 0x0002 288 #define OCFS2_OSB_ERROR_FS 0x0004 289 #define OCFS2_DEFAULT_ATIME_QUANTUM 60 290 291 struct ocfs2_journal; 292 struct ocfs2_slot_info; 293 struct ocfs2_recovery_map; 294 struct ocfs2_replay_map; 295 struct ocfs2_quota_recovery; 296 struct ocfs2_super 297 { 298 struct task_struct *commit_task; 299 struct super_block *sb; 300 struct inode *root_inode; 301 struct inode *sys_root_inode; 302 struct inode *global_system_inodes[NUM_GLOBAL_SYSTEM_INODES]; 303 struct inode **local_system_inodes; 304 305 struct ocfs2_slot_info *slot_info; 306 307 u32 *slot_recovery_generations; 308 309 spinlock_t node_map_lock; 310 311 u64 root_blkno; 312 u64 system_dir_blkno; 313 u64 bitmap_blkno; 314 u32 bitmap_cpg; 315 char *uuid_str; 316 u32 uuid_hash; 317 u8 *vol_label; 318 u64 first_cluster_group_blkno; 319 u32 fs_generation; 320 321 u32 s_feature_compat; 322 u32 s_feature_incompat; 323 u32 s_feature_ro_compat; 324 325 /* Protects s_next_generation, osb_flags and s_inode_steal_slot. 326 * Could protect more on osb as it's very short lived. 327 */ 328 spinlock_t osb_lock; 329 u32 s_next_generation; 330 unsigned long osb_flags; 331 s16 s_inode_steal_slot; 332 s16 s_meta_steal_slot; 333 atomic_t s_num_inodes_stolen; 334 atomic_t s_num_meta_stolen; 335 336 unsigned long s_mount_opt; 337 unsigned int s_atime_quantum; 338 339 unsigned int max_slots; 340 unsigned int node_num; 341 int slot_num; 342 int preferred_slot; 343 int s_sectsize_bits; 344 int s_clustersize; 345 int s_clustersize_bits; 346 unsigned int s_xattr_inline_size; 347 348 atomic_t vol_state; 349 struct mutex recovery_lock; 350 struct ocfs2_recovery_map *recovery_map; 351 struct ocfs2_replay_map *replay_map; 352 struct task_struct *recovery_thread_task; 353 int disable_recovery; 354 wait_queue_head_t checkpoint_event; 355 struct ocfs2_journal *journal; 356 unsigned long osb_commit_interval; 357 358 struct delayed_work la_enable_wq; 359 360 /* 361 * Must hold local alloc i_mutex and osb->osb_lock to change 362 * local_alloc_bits. Reads can be done under either lock. 363 */ 364 unsigned int local_alloc_bits; 365 unsigned int local_alloc_default_bits; 366 /* osb_clusters_at_boot can become stale! Do not trust it to 367 * be up to date. */ 368 unsigned int osb_clusters_at_boot; 369 370 enum ocfs2_local_alloc_state local_alloc_state; /* protected 371 * by osb_lock */ 372 373 struct buffer_head *local_alloc_bh; 374 375 u64 la_last_gd; 376 377 struct ocfs2_reservation_map osb_la_resmap; 378 379 unsigned int osb_resv_level; 380 unsigned int osb_dir_resv_level; 381 382 /* Next two fields are for local node slot recovery during 383 * mount. */ 384 struct ocfs2_dinode *local_alloc_copy; 385 struct ocfs2_quota_recovery *quota_rec; 386 387 struct ocfs2_blockcheck_stats osb_ecc_stats; 388 struct ocfs2_alloc_stats alloc_stats; 389 char dev_str[20]; /* "major,minor" of the device */ 390 391 u8 osb_stackflags; 392 393 char osb_cluster_stack[OCFS2_STACK_LABEL_LEN + 1]; 394 char osb_cluster_name[OCFS2_CLUSTER_NAME_LEN + 1]; 395 struct ocfs2_cluster_connection *cconn; 396 struct ocfs2_lock_res osb_super_lockres; 397 struct ocfs2_lock_res osb_rename_lockres; 398 struct ocfs2_lock_res osb_nfs_sync_lockres; 399 struct ocfs2_lock_res osb_trim_fs_lockres; 400 struct mutex obs_trim_fs_mutex; 401 struct ocfs2_dlm_debug *osb_dlm_debug; 402 403 struct dentry *osb_debug_root; 404 struct dentry *osb_ctxt; 405 406 wait_queue_head_t recovery_event; 407 408 spinlock_t dc_task_lock; 409 struct task_struct *dc_task; 410 wait_queue_head_t dc_event; 411 unsigned long dc_wake_sequence; 412 unsigned long dc_work_sequence; 413 414 /* 415 * Any thread can add locks to the list, but the downconvert 416 * thread is the only one allowed to remove locks. Any change 417 * to this rule requires updating 418 * ocfs2_downconvert_thread_do_work(). 419 */ 420 struct list_head blocked_lock_list; 421 unsigned long blocked_lock_count; 422 423 /* List of dquot structures to drop last reference to */ 424 struct llist_head dquot_drop_list; 425 struct work_struct dquot_drop_work; 426 427 wait_queue_head_t osb_mount_event; 428 429 /* Truncate log info */ 430 struct inode *osb_tl_inode; 431 struct buffer_head *osb_tl_bh; 432 struct delayed_work osb_truncate_log_wq; 433 atomic_t osb_tl_disable; 434 /* 435 * How many clusters in our truncate log. 436 * It must be protected by osb_tl_inode->i_mutex. 437 */ 438 unsigned int truncated_clusters; 439 440 struct ocfs2_node_map osb_recovering_orphan_dirs; 441 unsigned int *osb_orphan_wipes; 442 wait_queue_head_t osb_wipe_event; 443 444 struct ocfs2_orphan_scan osb_orphan_scan; 445 446 /* used to protect metaecc calculation check of xattr. */ 447 spinlock_t osb_xattr_lock; 448 449 unsigned int osb_dx_mask; 450 u32 osb_dx_seed[4]; 451 452 /* the group we used to allocate inodes. */ 453 u64 osb_inode_alloc_group; 454 455 /* rb tree root for refcount lock. */ 456 struct rb_root osb_rf_lock_tree; 457 struct ocfs2_refcount_tree *osb_ref_tree_lru; 458 459 struct mutex system_file_mutex; 460 461 /* 462 * OCFS2 needs to schedule several different types of work which 463 * require cluster locking, disk I/O, recovery waits, etc. Since these 464 * types of work tend to be heavy we avoid using the kernel events 465 * workqueue and schedule on our own. 466 */ 467 struct workqueue_struct *ocfs2_wq; 468 469 /* sysfs directory per partition */ 470 struct kset *osb_dev_kset; 471 472 /* file check related stuff */ 473 struct ocfs2_filecheck_sysfs_entry osb_fc_ent; 474 }; 475 476 #define OCFS2_SB(sb) ((struct ocfs2_super *)(sb)->s_fs_info) 477 478 /* Useful typedef for passing around journal access functions */ 479 typedef int (*ocfs2_journal_access_func)(handle_t *handle, 480 struct ocfs2_caching_info *ci, 481 struct buffer_head *bh, int type); 482 483 static inline int ocfs2_should_order_data(struct inode *inode) 484 { 485 if (!S_ISREG(inode->i_mode)) 486 return 0; 487 if (OCFS2_SB(inode->i_sb)->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) 488 return 0; 489 return 1; 490 } 491 492 static inline int ocfs2_sparse_alloc(struct ocfs2_super *osb) 493 { 494 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC) 495 return 1; 496 return 0; 497 } 498 499 static inline int ocfs2_writes_unwritten_extents(struct ocfs2_super *osb) 500 { 501 /* 502 * Support for sparse files is a pre-requisite 503 */ 504 if (!ocfs2_sparse_alloc(osb)) 505 return 0; 506 507 if (osb->s_feature_ro_compat & OCFS2_FEATURE_RO_COMPAT_UNWRITTEN) 508 return 1; 509 return 0; 510 } 511 512 static inline int ocfs2_supports_append_dio(struct ocfs2_super *osb) 513 { 514 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_APPEND_DIO) 515 return 1; 516 return 0; 517 } 518 519 520 static inline int ocfs2_supports_inline_data(struct ocfs2_super *osb) 521 { 522 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INLINE_DATA) 523 return 1; 524 return 0; 525 } 526 527 static inline int ocfs2_supports_xattr(struct ocfs2_super *osb) 528 { 529 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_XATTR) 530 return 1; 531 return 0; 532 } 533 534 static inline int ocfs2_meta_ecc(struct ocfs2_super *osb) 535 { 536 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_META_ECC) 537 return 1; 538 return 0; 539 } 540 541 static inline int ocfs2_supports_indexed_dirs(struct ocfs2_super *osb) 542 { 543 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INDEXED_DIRS) 544 return 1; 545 return 0; 546 } 547 548 static inline int ocfs2_supports_discontig_bg(struct ocfs2_super *osb) 549 { 550 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_DISCONTIG_BG) 551 return 1; 552 return 0; 553 } 554 555 static inline unsigned int ocfs2_link_max(struct ocfs2_super *osb) 556 { 557 if (ocfs2_supports_indexed_dirs(osb)) 558 return OCFS2_DX_LINK_MAX; 559 return OCFS2_LINK_MAX; 560 } 561 562 static inline unsigned int ocfs2_read_links_count(struct ocfs2_dinode *di) 563 { 564 u32 nlink = le16_to_cpu(di->i_links_count); 565 u32 hi = le16_to_cpu(di->i_links_count_hi); 566 567 if (di->i_dyn_features & cpu_to_le16(OCFS2_INDEXED_DIR_FL)) 568 nlink |= (hi << OCFS2_LINKS_HI_SHIFT); 569 570 return nlink; 571 } 572 573 static inline void ocfs2_set_links_count(struct ocfs2_dinode *di, u32 nlink) 574 { 575 u16 lo, hi; 576 577 lo = nlink; 578 hi = nlink >> OCFS2_LINKS_HI_SHIFT; 579 580 di->i_links_count = cpu_to_le16(lo); 581 di->i_links_count_hi = cpu_to_le16(hi); 582 } 583 584 static inline void ocfs2_add_links_count(struct ocfs2_dinode *di, int n) 585 { 586 u32 links = ocfs2_read_links_count(di); 587 588 links += n; 589 590 ocfs2_set_links_count(di, links); 591 } 592 593 static inline int ocfs2_refcount_tree(struct ocfs2_super *osb) 594 { 595 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_REFCOUNT_TREE) 596 return 1; 597 return 0; 598 } 599 600 /* set / clear functions because cluster events can make these happen 601 * in parallel so we want the transitions to be atomic. this also 602 * means that any future flags osb_flags must be protected by spinlock 603 * too! */ 604 static inline void ocfs2_set_osb_flag(struct ocfs2_super *osb, 605 unsigned long flag) 606 { 607 spin_lock(&osb->osb_lock); 608 osb->osb_flags |= flag; 609 spin_unlock(&osb->osb_lock); 610 } 611 612 static inline void ocfs2_set_ro_flag(struct ocfs2_super *osb, 613 int hard) 614 { 615 spin_lock(&osb->osb_lock); 616 osb->osb_flags &= ~(OCFS2_OSB_SOFT_RO|OCFS2_OSB_HARD_RO); 617 if (hard) 618 osb->osb_flags |= OCFS2_OSB_HARD_RO; 619 else 620 osb->osb_flags |= OCFS2_OSB_SOFT_RO; 621 spin_unlock(&osb->osb_lock); 622 } 623 624 static inline int ocfs2_is_hard_readonly(struct ocfs2_super *osb) 625 { 626 int ret; 627 628 spin_lock(&osb->osb_lock); 629 ret = osb->osb_flags & OCFS2_OSB_HARD_RO; 630 spin_unlock(&osb->osb_lock); 631 632 return ret; 633 } 634 635 static inline int ocfs2_is_soft_readonly(struct ocfs2_super *osb) 636 { 637 int ret; 638 639 spin_lock(&osb->osb_lock); 640 ret = osb->osb_flags & OCFS2_OSB_SOFT_RO; 641 spin_unlock(&osb->osb_lock); 642 643 return ret; 644 } 645 646 static inline int ocfs2_clusterinfo_valid(struct ocfs2_super *osb) 647 { 648 return (osb->s_feature_incompat & 649 (OCFS2_FEATURE_INCOMPAT_USERSPACE_STACK | 650 OCFS2_FEATURE_INCOMPAT_CLUSTERINFO)); 651 } 652 653 static inline int ocfs2_userspace_stack(struct ocfs2_super *osb) 654 { 655 if (ocfs2_clusterinfo_valid(osb) && 656 memcmp(osb->osb_cluster_stack, OCFS2_CLASSIC_CLUSTER_STACK, 657 OCFS2_STACK_LABEL_LEN)) 658 return 1; 659 return 0; 660 } 661 662 static inline int ocfs2_o2cb_stack(struct ocfs2_super *osb) 663 { 664 if (ocfs2_clusterinfo_valid(osb) && 665 !memcmp(osb->osb_cluster_stack, OCFS2_CLASSIC_CLUSTER_STACK, 666 OCFS2_STACK_LABEL_LEN)) 667 return 1; 668 return 0; 669 } 670 671 static inline int ocfs2_cluster_o2cb_global_heartbeat(struct ocfs2_super *osb) 672 { 673 return ocfs2_o2cb_stack(osb) && 674 (osb->osb_stackflags & OCFS2_CLUSTER_O2CB_GLOBAL_HEARTBEAT); 675 } 676 677 static inline int ocfs2_mount_local(struct ocfs2_super *osb) 678 { 679 return (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT); 680 } 681 682 static inline int ocfs2_uses_extended_slot_map(struct ocfs2_super *osb) 683 { 684 return (osb->s_feature_incompat & 685 OCFS2_FEATURE_INCOMPAT_EXTENDED_SLOT_MAP); 686 } 687 688 689 #define OCFS2_IS_VALID_DINODE(ptr) \ 690 (!strcmp((ptr)->i_signature, OCFS2_INODE_SIGNATURE)) 691 692 #define OCFS2_IS_VALID_EXTENT_BLOCK(ptr) \ 693 (!strcmp((ptr)->h_signature, OCFS2_EXTENT_BLOCK_SIGNATURE)) 694 695 #define OCFS2_IS_VALID_GROUP_DESC(ptr) \ 696 (!strcmp((ptr)->bg_signature, OCFS2_GROUP_DESC_SIGNATURE)) 697 698 699 #define OCFS2_IS_VALID_XATTR_BLOCK(ptr) \ 700 (!strcmp((ptr)->xb_signature, OCFS2_XATTR_BLOCK_SIGNATURE)) 701 702 #define OCFS2_IS_VALID_DIR_TRAILER(ptr) \ 703 (!strcmp((ptr)->db_signature, OCFS2_DIR_TRAILER_SIGNATURE)) 704 705 #define OCFS2_IS_VALID_DX_ROOT(ptr) \ 706 (!strcmp((ptr)->dr_signature, OCFS2_DX_ROOT_SIGNATURE)) 707 708 #define OCFS2_IS_VALID_DX_LEAF(ptr) \ 709 (!strcmp((ptr)->dl_signature, OCFS2_DX_LEAF_SIGNATURE)) 710 711 #define OCFS2_IS_VALID_REFCOUNT_BLOCK(ptr) \ 712 (!strcmp((ptr)->rf_signature, OCFS2_REFCOUNT_BLOCK_SIGNATURE)) 713 714 static inline unsigned long ino_from_blkno(struct super_block *sb, 715 u64 blkno) 716 { 717 return (unsigned long)(blkno & (u64)ULONG_MAX); 718 } 719 720 static inline u64 ocfs2_clusters_to_blocks(struct super_block *sb, 721 u32 clusters) 722 { 723 int c_to_b_bits = OCFS2_SB(sb)->s_clustersize_bits - 724 sb->s_blocksize_bits; 725 726 return (u64)clusters << c_to_b_bits; 727 } 728 729 static inline u32 ocfs2_clusters_for_blocks(struct super_block *sb, 730 u64 blocks) 731 { 732 int b_to_c_bits = OCFS2_SB(sb)->s_clustersize_bits - 733 sb->s_blocksize_bits; 734 735 blocks += (1 << b_to_c_bits) - 1; 736 return (u32)(blocks >> b_to_c_bits); 737 } 738 739 static inline u32 ocfs2_blocks_to_clusters(struct super_block *sb, 740 u64 blocks) 741 { 742 int b_to_c_bits = OCFS2_SB(sb)->s_clustersize_bits - 743 sb->s_blocksize_bits; 744 745 return (u32)(blocks >> b_to_c_bits); 746 } 747 748 static inline unsigned int ocfs2_clusters_for_bytes(struct super_block *sb, 749 u64 bytes) 750 { 751 int cl_bits = OCFS2_SB(sb)->s_clustersize_bits; 752 unsigned int clusters; 753 754 bytes += OCFS2_SB(sb)->s_clustersize - 1; 755 /* OCFS2 just cannot have enough clusters to overflow this */ 756 clusters = (unsigned int)(bytes >> cl_bits); 757 758 return clusters; 759 } 760 761 static inline unsigned int ocfs2_bytes_to_clusters(struct super_block *sb, 762 u64 bytes) 763 { 764 int cl_bits = OCFS2_SB(sb)->s_clustersize_bits; 765 unsigned int clusters; 766 767 clusters = (unsigned int)(bytes >> cl_bits); 768 return clusters; 769 } 770 771 static inline u64 ocfs2_blocks_for_bytes(struct super_block *sb, 772 u64 bytes) 773 { 774 bytes += sb->s_blocksize - 1; 775 return bytes >> sb->s_blocksize_bits; 776 } 777 778 static inline u64 ocfs2_clusters_to_bytes(struct super_block *sb, 779 u32 clusters) 780 { 781 return (u64)clusters << OCFS2_SB(sb)->s_clustersize_bits; 782 } 783 784 static inline u64 ocfs2_block_to_cluster_start(struct super_block *sb, 785 u64 blocks) 786 { 787 int bits = OCFS2_SB(sb)->s_clustersize_bits - sb->s_blocksize_bits; 788 unsigned int clusters; 789 790 clusters = ocfs2_blocks_to_clusters(sb, blocks); 791 return (u64)clusters << bits; 792 } 793 794 static inline u64 ocfs2_align_bytes_to_clusters(struct super_block *sb, 795 u64 bytes) 796 { 797 int cl_bits = OCFS2_SB(sb)->s_clustersize_bits; 798 unsigned int clusters; 799 800 clusters = ocfs2_clusters_for_bytes(sb, bytes); 801 return (u64)clusters << cl_bits; 802 } 803 804 static inline u64 ocfs2_align_bytes_to_blocks(struct super_block *sb, 805 u64 bytes) 806 { 807 u64 blocks; 808 809 blocks = ocfs2_blocks_for_bytes(sb, bytes); 810 return blocks << sb->s_blocksize_bits; 811 } 812 813 static inline unsigned long ocfs2_align_bytes_to_sectors(u64 bytes) 814 { 815 return (unsigned long)((bytes + 511) >> 9); 816 } 817 818 static inline unsigned int ocfs2_page_index_to_clusters(struct super_block *sb, 819 unsigned long pg_index) 820 { 821 u32 clusters = pg_index; 822 unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; 823 824 if (unlikely(PAGE_SHIFT > cbits)) 825 clusters = pg_index << (PAGE_SHIFT - cbits); 826 else if (PAGE_SHIFT < cbits) 827 clusters = pg_index >> (cbits - PAGE_SHIFT); 828 829 return clusters; 830 } 831 832 /* 833 * Find the 1st page index which covers the given clusters. 834 */ 835 static inline pgoff_t ocfs2_align_clusters_to_page_index(struct super_block *sb, 836 u32 clusters) 837 { 838 unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; 839 pgoff_t index = clusters; 840 841 if (PAGE_SHIFT > cbits) { 842 index = (pgoff_t)clusters >> (PAGE_SHIFT - cbits); 843 } else if (PAGE_SHIFT < cbits) { 844 index = (pgoff_t)clusters << (cbits - PAGE_SHIFT); 845 } 846 847 return index; 848 } 849 850 static inline unsigned int ocfs2_pages_per_cluster(struct super_block *sb) 851 { 852 unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; 853 unsigned int pages_per_cluster = 1; 854 855 if (PAGE_SHIFT < cbits) 856 pages_per_cluster = 1 << (cbits - PAGE_SHIFT); 857 858 return pages_per_cluster; 859 } 860 861 static inline unsigned int ocfs2_megabytes_to_clusters(struct super_block *sb, 862 unsigned int megs) 863 { 864 BUILD_BUG_ON(OCFS2_MAX_CLUSTERSIZE > 1048576); 865 866 return megs << (20 - OCFS2_SB(sb)->s_clustersize_bits); 867 } 868 869 static inline unsigned int ocfs2_clusters_to_megabytes(struct super_block *sb, 870 unsigned int clusters) 871 { 872 return clusters >> (20 - OCFS2_SB(sb)->s_clustersize_bits); 873 } 874 875 static inline void _ocfs2_set_bit(unsigned int bit, unsigned long *bitmap) 876 { 877 __set_bit_le(bit, bitmap); 878 } 879 #define ocfs2_set_bit(bit, addr) _ocfs2_set_bit((bit), (unsigned long *)(addr)) 880 881 static inline void _ocfs2_clear_bit(unsigned int bit, unsigned long *bitmap) 882 { 883 __clear_bit_le(bit, bitmap); 884 } 885 #define ocfs2_clear_bit(bit, addr) _ocfs2_clear_bit((bit), (unsigned long *)(addr)) 886 887 #define ocfs2_test_bit test_bit_le 888 #define ocfs2_find_next_zero_bit find_next_zero_bit_le 889 #define ocfs2_find_next_bit find_next_bit_le 890 891 static inline void *correct_addr_and_bit_unaligned(int *bit, void *addr) 892 { 893 #if BITS_PER_LONG == 64 894 *bit += ((unsigned long) addr & 7UL) << 3; 895 addr = (void *) ((unsigned long) addr & ~7UL); 896 #elif BITS_PER_LONG == 32 897 *bit += ((unsigned long) addr & 3UL) << 3; 898 addr = (void *) ((unsigned long) addr & ~3UL); 899 #else 900 #error "how many bits you are?!" 901 #endif 902 return addr; 903 } 904 905 static inline void ocfs2_set_bit_unaligned(int bit, void *bitmap) 906 { 907 bitmap = correct_addr_and_bit_unaligned(&bit, bitmap); 908 ocfs2_set_bit(bit, bitmap); 909 } 910 911 static inline void ocfs2_clear_bit_unaligned(int bit, void *bitmap) 912 { 913 bitmap = correct_addr_and_bit_unaligned(&bit, bitmap); 914 ocfs2_clear_bit(bit, bitmap); 915 } 916 917 static inline int ocfs2_test_bit_unaligned(int bit, void *bitmap) 918 { 919 bitmap = correct_addr_and_bit_unaligned(&bit, bitmap); 920 return ocfs2_test_bit(bit, bitmap); 921 } 922 923 static inline int ocfs2_find_next_zero_bit_unaligned(void *bitmap, int max, 924 int start) 925 { 926 int fix = 0, ret, tmpmax; 927 bitmap = correct_addr_and_bit_unaligned(&fix, bitmap); 928 tmpmax = max + fix; 929 start += fix; 930 931 ret = ocfs2_find_next_zero_bit(bitmap, tmpmax, start) - fix; 932 if (ret > max) 933 return max; 934 return ret; 935 } 936 937 #endif /* OCFS2_H */ 938 939