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 enum ocfs2_recovery_state { 312 OCFS2_REC_ENABLED = 0, 313 OCFS2_REC_QUOTA_WANT_DISABLE, 314 /* 315 * Must be OCFS2_REC_QUOTA_WANT_DISABLE + 1 for 316 * ocfs2_recovery_disable_quota() to work. 317 */ 318 OCFS2_REC_QUOTA_DISABLED, 319 OCFS2_REC_WANT_DISABLE, 320 /* 321 * Must be OCFS2_REC_WANT_DISABLE + 1 for ocfs2_recovery_exit() to work 322 */ 323 OCFS2_REC_DISABLED, 324 }; 325 326 struct ocfs2_journal; 327 struct ocfs2_slot_info; 328 struct ocfs2_recovery_map; 329 struct ocfs2_replay_map; 330 struct ocfs2_quota_recovery; 331 struct ocfs2_super 332 { 333 struct task_struct *commit_task; 334 struct super_block *sb; 335 struct inode *root_inode; 336 struct inode *sys_root_inode; 337 struct inode *global_system_inodes[NUM_GLOBAL_SYSTEM_INODES]; 338 struct inode **local_system_inodes; 339 340 struct ocfs2_slot_info *slot_info; 341 342 u32 *slot_recovery_generations; 343 344 spinlock_t node_map_lock; 345 346 u64 root_blkno; 347 u64 system_dir_blkno; 348 u64 bitmap_blkno; 349 u32 bitmap_cpg; 350 char *uuid_str; 351 u32 uuid_hash; 352 u8 *vol_label; 353 u64 first_cluster_group_blkno; 354 u32 fs_generation; 355 356 u32 s_feature_compat; 357 u32 s_feature_incompat; 358 u32 s_feature_ro_compat; 359 360 /* Protects s_next_generation, osb_flags and s_inode_steal_slot. 361 * Could protect more on osb as it's very short lived. 362 */ 363 spinlock_t osb_lock; 364 u32 s_next_generation; 365 unsigned long osb_flags; 366 u16 s_inode_steal_slot; 367 u16 s_meta_steal_slot; 368 atomic_t s_num_inodes_stolen; 369 atomic_t s_num_meta_stolen; 370 371 unsigned long s_mount_opt; 372 unsigned int s_atime_quantum; 373 374 unsigned int max_slots; 375 unsigned int node_num; 376 int slot_num; 377 int preferred_slot; 378 int s_sectsize_bits; 379 int s_clustersize; 380 int s_clustersize_bits; 381 unsigned int s_xattr_inline_size; 382 383 atomic_t vol_state; 384 struct mutex recovery_lock; 385 struct ocfs2_recovery_map *recovery_map; 386 struct ocfs2_replay_map *replay_map; 387 struct task_struct *recovery_thread_task; 388 enum ocfs2_recovery_state recovery_state; 389 wait_queue_head_t checkpoint_event; 390 struct ocfs2_journal *journal; 391 unsigned long osb_commit_interval; 392 393 /* Journal triggers for checksum */ 394 struct ocfs2_triggers s_journal_triggers[OCFS2_JOURNAL_TRIGGER_COUNT]; 395 396 struct delayed_work la_enable_wq; 397 398 /* 399 * Must hold local alloc i_rwsem and osb->osb_lock to change 400 * local_alloc_bits. Reads can be done under either lock. 401 */ 402 unsigned int local_alloc_bits; 403 unsigned int local_alloc_default_bits; 404 /* osb_clusters_at_boot can become stale! Do not trust it to 405 * be up to date. */ 406 unsigned int osb_clusters_at_boot; 407 408 enum ocfs2_local_alloc_state local_alloc_state; /* protected 409 * by osb_lock */ 410 411 struct buffer_head *local_alloc_bh; 412 413 u64 la_last_gd; 414 415 struct ocfs2_reservation_map osb_la_resmap; 416 417 unsigned int osb_resv_level; 418 unsigned int osb_dir_resv_level; 419 420 /* Next two fields are for local node slot recovery during 421 * mount. */ 422 struct ocfs2_dinode *local_alloc_copy; 423 struct ocfs2_quota_recovery *quota_rec; 424 425 struct ocfs2_blockcheck_stats osb_ecc_stats; 426 struct ocfs2_alloc_stats alloc_stats; 427 char dev_str[20]; /* "major,minor" of the device */ 428 429 u8 osb_stackflags; 430 431 char osb_cluster_stack[OCFS2_STACK_LABEL_LEN + 1]; 432 char osb_cluster_name[OCFS2_CLUSTER_NAME_LEN + 1]; 433 struct ocfs2_cluster_connection *cconn; 434 struct ocfs2_lock_res osb_super_lockres; 435 struct ocfs2_lock_res osb_rename_lockres; 436 struct ocfs2_lock_res osb_nfs_sync_lockres; 437 struct rw_semaphore nfs_sync_rwlock; 438 struct ocfs2_lock_res osb_trim_fs_lockres; 439 struct mutex obs_trim_fs_mutex; 440 struct ocfs2_dlm_debug *osb_dlm_debug; 441 442 struct dentry *osb_debug_root; 443 444 wait_queue_head_t recovery_event; 445 446 spinlock_t dc_task_lock; 447 struct task_struct *dc_task; 448 wait_queue_head_t dc_event; 449 unsigned long dc_wake_sequence; 450 unsigned long dc_work_sequence; 451 452 /* 453 * Any thread can add locks to the list, but the downconvert 454 * thread is the only one allowed to remove locks. Any change 455 * to this rule requires updating 456 * ocfs2_downconvert_thread_do_work(). 457 */ 458 struct list_head blocked_lock_list; 459 unsigned long blocked_lock_count; 460 461 /* List of dquot structures to drop last reference to */ 462 struct llist_head dquot_drop_list; 463 struct work_struct dquot_drop_work; 464 465 wait_queue_head_t osb_mount_event; 466 467 /* Truncate log info */ 468 struct inode *osb_tl_inode; 469 struct buffer_head *osb_tl_bh; 470 struct delayed_work osb_truncate_log_wq; 471 atomic_t osb_tl_disable; 472 /* 473 * How many clusters in our truncate log. 474 * It must be protected by osb_tl_inode->i_rwsem. 475 */ 476 unsigned int truncated_clusters; 477 478 struct ocfs2_node_map osb_recovering_orphan_dirs; 479 unsigned int *osb_orphan_wipes; 480 wait_queue_head_t osb_wipe_event; 481 482 struct ocfs2_orphan_scan osb_orphan_scan; 483 484 /* used to protect metaecc calculation check of xattr. */ 485 spinlock_t osb_xattr_lock; 486 487 unsigned int osb_dx_mask; 488 u32 osb_dx_seed[4]; 489 490 /* the group we used to allocate inodes. */ 491 u64 osb_inode_alloc_group; 492 493 /* rb tree root for refcount lock. */ 494 struct rb_root osb_rf_lock_tree; 495 struct ocfs2_refcount_tree *osb_ref_tree_lru; 496 497 /* 498 * OCFS2 needs to schedule several different types of work which 499 * require cluster locking, disk I/O, recovery waits, etc. Since these 500 * types of work tend to be heavy we avoid using the kernel events 501 * workqueue and schedule on our own. 502 */ 503 struct workqueue_struct *ocfs2_wq; 504 505 /* sysfs directory per partition */ 506 struct kset *osb_dev_kset; 507 508 /* file check related stuff */ 509 struct ocfs2_filecheck_sysfs_entry osb_fc_ent; 510 }; 511 512 #define OCFS2_SB(sb) ((struct ocfs2_super *)(sb)->s_fs_info) 513 514 /* Useful typedef for passing around journal access functions */ 515 typedef int (*ocfs2_journal_access_func)(handle_t *handle, 516 struct ocfs2_caching_info *ci, 517 struct buffer_head *bh, int type); 518 519 static inline int ocfs2_should_order_data(struct inode *inode) 520 { 521 if (!S_ISREG(inode->i_mode)) 522 return 0; 523 if (OCFS2_SB(inode->i_sb)->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) 524 return 0; 525 return 1; 526 } 527 528 static inline int ocfs2_sparse_alloc(struct ocfs2_super *osb) 529 { 530 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC) 531 return 1; 532 return 0; 533 } 534 535 static inline int ocfs2_writes_unwritten_extents(struct ocfs2_super *osb) 536 { 537 /* 538 * Support for sparse files is a pre-requisite 539 */ 540 if (!ocfs2_sparse_alloc(osb)) 541 return 0; 542 543 if (osb->s_feature_ro_compat & OCFS2_FEATURE_RO_COMPAT_UNWRITTEN) 544 return 1; 545 return 0; 546 } 547 548 static inline int ocfs2_supports_append_dio(struct ocfs2_super *osb) 549 { 550 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_APPEND_DIO) 551 return 1; 552 return 0; 553 } 554 555 556 static inline int ocfs2_supports_inline_data(struct ocfs2_super *osb) 557 { 558 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INLINE_DATA) 559 return 1; 560 return 0; 561 } 562 563 static inline int ocfs2_supports_xattr(struct ocfs2_super *osb) 564 { 565 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_XATTR) 566 return 1; 567 return 0; 568 } 569 570 static inline int ocfs2_meta_ecc(struct ocfs2_super *osb) 571 { 572 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_META_ECC) 573 return 1; 574 return 0; 575 } 576 577 static inline int ocfs2_supports_indexed_dirs(struct ocfs2_super *osb) 578 { 579 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INDEXED_DIRS) 580 return 1; 581 return 0; 582 } 583 584 static inline int ocfs2_supports_discontig_bg(struct ocfs2_super *osb) 585 { 586 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_DISCONTIG_BG) 587 return 1; 588 return 0; 589 } 590 591 static inline unsigned int ocfs2_link_max(struct ocfs2_super *osb) 592 { 593 if (ocfs2_supports_indexed_dirs(osb)) 594 return OCFS2_DX_LINK_MAX; 595 return OCFS2_LINK_MAX; 596 } 597 598 static inline unsigned int ocfs2_read_links_count(struct ocfs2_dinode *di) 599 { 600 u32 nlink = le16_to_cpu(di->i_links_count); 601 u32 hi = le16_to_cpu(di->i_links_count_hi); 602 603 nlink |= (hi << OCFS2_LINKS_HI_SHIFT); 604 605 return nlink; 606 } 607 608 static inline void ocfs2_set_links_count(struct ocfs2_dinode *di, u32 nlink) 609 { 610 u16 lo, hi; 611 612 lo = nlink; 613 hi = nlink >> OCFS2_LINKS_HI_SHIFT; 614 615 di->i_links_count = cpu_to_le16(lo); 616 di->i_links_count_hi = cpu_to_le16(hi); 617 } 618 619 static inline void ocfs2_add_links_count(struct ocfs2_dinode *di, int n) 620 { 621 u32 links = ocfs2_read_links_count(di); 622 623 links += n; 624 625 ocfs2_set_links_count(di, links); 626 } 627 628 static inline int ocfs2_refcount_tree(struct ocfs2_super *osb) 629 { 630 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_REFCOUNT_TREE) 631 return 1; 632 return 0; 633 } 634 635 /* set / clear functions because cluster events can make these happen 636 * in parallel so we want the transitions to be atomic. this also 637 * means that any future flags osb_flags must be protected by spinlock 638 * too! */ 639 static inline void ocfs2_set_osb_flag(struct ocfs2_super *osb, 640 unsigned long flag) 641 { 642 spin_lock(&osb->osb_lock); 643 osb->osb_flags |= flag; 644 spin_unlock(&osb->osb_lock); 645 } 646 647 static inline void ocfs2_set_ro_flag(struct ocfs2_super *osb, 648 int hard) 649 { 650 spin_lock(&osb->osb_lock); 651 osb->osb_flags &= ~(OCFS2_OSB_SOFT_RO|OCFS2_OSB_HARD_RO); 652 if (hard) 653 osb->osb_flags |= OCFS2_OSB_HARD_RO; 654 else 655 osb->osb_flags |= OCFS2_OSB_SOFT_RO; 656 spin_unlock(&osb->osb_lock); 657 } 658 659 static inline int ocfs2_is_hard_readonly(struct ocfs2_super *osb) 660 { 661 int ret; 662 663 spin_lock(&osb->osb_lock); 664 ret = osb->osb_flags & OCFS2_OSB_HARD_RO; 665 spin_unlock(&osb->osb_lock); 666 667 return ret; 668 } 669 670 static inline int ocfs2_is_soft_readonly(struct ocfs2_super *osb) 671 { 672 int ret; 673 674 spin_lock(&osb->osb_lock); 675 ret = osb->osb_flags & OCFS2_OSB_SOFT_RO; 676 spin_unlock(&osb->osb_lock); 677 678 return ret; 679 } 680 681 static inline int ocfs2_is_readonly(struct ocfs2_super *osb) 682 { 683 int ret; 684 spin_lock(&osb->osb_lock); 685 ret = osb->osb_flags & (OCFS2_OSB_SOFT_RO | OCFS2_OSB_HARD_RO); 686 spin_unlock(&osb->osb_lock); 687 688 return ret; 689 } 690 691 static inline int ocfs2_emergency_state(struct ocfs2_super *osb) 692 { 693 if (ocfs2_is_readonly(osb)) 694 return -EROFS; 695 696 return 0; 697 } 698 699 static inline int ocfs2_clusterinfo_valid(struct ocfs2_super *osb) 700 { 701 return (osb->s_feature_incompat & 702 (OCFS2_FEATURE_INCOMPAT_USERSPACE_STACK | 703 OCFS2_FEATURE_INCOMPAT_CLUSTERINFO)); 704 } 705 706 static inline int ocfs2_userspace_stack(struct ocfs2_super *osb) 707 { 708 if (ocfs2_clusterinfo_valid(osb) && 709 memcmp(osb->osb_cluster_stack, OCFS2_CLASSIC_CLUSTER_STACK, 710 OCFS2_STACK_LABEL_LEN)) 711 return 1; 712 return 0; 713 } 714 715 static inline int ocfs2_o2cb_stack(struct ocfs2_super *osb) 716 { 717 if (ocfs2_clusterinfo_valid(osb) && 718 !memcmp(osb->osb_cluster_stack, OCFS2_CLASSIC_CLUSTER_STACK, 719 OCFS2_STACK_LABEL_LEN)) 720 return 1; 721 return 0; 722 } 723 724 static inline int ocfs2_cluster_o2cb_global_heartbeat(struct ocfs2_super *osb) 725 { 726 return ocfs2_o2cb_stack(osb) && 727 (osb->osb_stackflags & OCFS2_CLUSTER_O2CB_GLOBAL_HEARTBEAT); 728 } 729 730 static inline int ocfs2_mount_local(struct ocfs2_super *osb) 731 { 732 return (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT); 733 } 734 735 static inline int ocfs2_uses_extended_slot_map(struct ocfs2_super *osb) 736 { 737 return (osb->s_feature_incompat & 738 OCFS2_FEATURE_INCOMPAT_EXTENDED_SLOT_MAP); 739 } 740 741 742 #define OCFS2_IS_VALID_DINODE(ptr) \ 743 (!strcmp((ptr)->i_signature, OCFS2_INODE_SIGNATURE)) 744 745 #define OCFS2_IS_VALID_EXTENT_BLOCK(ptr) \ 746 (!strcmp((ptr)->h_signature, OCFS2_EXTENT_BLOCK_SIGNATURE)) 747 748 #define OCFS2_IS_VALID_GROUP_DESC(ptr) \ 749 (!strcmp((ptr)->bg_signature, OCFS2_GROUP_DESC_SIGNATURE)) 750 751 752 #define OCFS2_IS_VALID_XATTR_BLOCK(ptr) \ 753 (!strcmp((ptr)->xb_signature, OCFS2_XATTR_BLOCK_SIGNATURE)) 754 755 #define OCFS2_IS_VALID_DIR_TRAILER(ptr) \ 756 (!strcmp((ptr)->db_signature, OCFS2_DIR_TRAILER_SIGNATURE)) 757 758 #define OCFS2_IS_VALID_DX_ROOT(ptr) \ 759 (!strcmp((ptr)->dr_signature, OCFS2_DX_ROOT_SIGNATURE)) 760 761 #define OCFS2_IS_VALID_DX_LEAF(ptr) \ 762 (!strcmp((ptr)->dl_signature, OCFS2_DX_LEAF_SIGNATURE)) 763 764 #define OCFS2_IS_VALID_REFCOUNT_BLOCK(ptr) \ 765 (!strcmp((ptr)->rf_signature, OCFS2_REFCOUNT_BLOCK_SIGNATURE)) 766 767 static inline unsigned long ino_from_blkno(struct super_block *sb, 768 u64 blkno) 769 { 770 return (unsigned long)(blkno & (u64)ULONG_MAX); 771 } 772 773 static inline u64 ocfs2_clusters_to_blocks(struct super_block *sb, 774 u32 clusters) 775 { 776 int c_to_b_bits = OCFS2_SB(sb)->s_clustersize_bits - 777 sb->s_blocksize_bits; 778 779 return (u64)clusters << c_to_b_bits; 780 } 781 782 static inline u32 ocfs2_clusters_for_blocks(struct super_block *sb, 783 u64 blocks) 784 { 785 int b_to_c_bits = OCFS2_SB(sb)->s_clustersize_bits - 786 sb->s_blocksize_bits; 787 788 blocks += (1 << b_to_c_bits) - 1; 789 return (u32)(blocks >> b_to_c_bits); 790 } 791 792 static inline u32 ocfs2_blocks_to_clusters(struct super_block *sb, 793 u64 blocks) 794 { 795 int b_to_c_bits = OCFS2_SB(sb)->s_clustersize_bits - 796 sb->s_blocksize_bits; 797 798 return (u32)(blocks >> b_to_c_bits); 799 } 800 801 static inline unsigned int ocfs2_clusters_for_bytes(struct super_block *sb, 802 u64 bytes) 803 { 804 int cl_bits = OCFS2_SB(sb)->s_clustersize_bits; 805 unsigned int clusters; 806 807 bytes += OCFS2_SB(sb)->s_clustersize - 1; 808 /* OCFS2 just cannot have enough clusters to overflow this */ 809 clusters = (unsigned int)(bytes >> cl_bits); 810 811 return clusters; 812 } 813 814 static inline unsigned int ocfs2_bytes_to_clusters(struct super_block *sb, 815 u64 bytes) 816 { 817 int cl_bits = OCFS2_SB(sb)->s_clustersize_bits; 818 unsigned int clusters; 819 820 clusters = (unsigned int)(bytes >> cl_bits); 821 return clusters; 822 } 823 824 static inline u64 ocfs2_blocks_for_bytes(struct super_block *sb, 825 u64 bytes) 826 { 827 bytes += sb->s_blocksize - 1; 828 return bytes >> sb->s_blocksize_bits; 829 } 830 831 static inline u64 ocfs2_clusters_to_bytes(struct super_block *sb, 832 u32 clusters) 833 { 834 return (u64)clusters << OCFS2_SB(sb)->s_clustersize_bits; 835 } 836 837 static inline u64 ocfs2_block_to_cluster_start(struct super_block *sb, 838 u64 blocks) 839 { 840 int bits = OCFS2_SB(sb)->s_clustersize_bits - sb->s_blocksize_bits; 841 unsigned int clusters; 842 843 clusters = ocfs2_blocks_to_clusters(sb, blocks); 844 return (u64)clusters << bits; 845 } 846 847 static inline u64 ocfs2_align_bytes_to_clusters(struct super_block *sb, 848 u64 bytes) 849 { 850 int cl_bits = OCFS2_SB(sb)->s_clustersize_bits; 851 unsigned int clusters; 852 853 clusters = ocfs2_clusters_for_bytes(sb, bytes); 854 return (u64)clusters << cl_bits; 855 } 856 857 static inline u64 ocfs2_align_bytes_to_blocks(struct super_block *sb, 858 u64 bytes) 859 { 860 u64 blocks; 861 862 blocks = ocfs2_blocks_for_bytes(sb, bytes); 863 return blocks << sb->s_blocksize_bits; 864 } 865 866 static inline unsigned long ocfs2_align_bytes_to_sectors(u64 bytes) 867 { 868 return (unsigned long)((bytes + 511) >> 9); 869 } 870 871 static inline unsigned int ocfs2_page_index_to_clusters(struct super_block *sb, 872 unsigned long pg_index) 873 { 874 u32 clusters = pg_index; 875 unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; 876 877 if (unlikely(PAGE_SHIFT > cbits)) 878 clusters = pg_index << (PAGE_SHIFT - cbits); 879 else if (PAGE_SHIFT < cbits) 880 clusters = pg_index >> (cbits - PAGE_SHIFT); 881 882 return clusters; 883 } 884 885 /* 886 * Find the 1st page index which covers the given clusters. 887 */ 888 static inline pgoff_t ocfs2_align_clusters_to_page_index(struct super_block *sb, 889 u32 clusters) 890 { 891 unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; 892 pgoff_t index = clusters; 893 894 if (PAGE_SHIFT > cbits) { 895 index = (pgoff_t)clusters >> (PAGE_SHIFT - cbits); 896 } else if (PAGE_SHIFT < cbits) { 897 index = (pgoff_t)clusters << (cbits - PAGE_SHIFT); 898 } 899 900 return index; 901 } 902 903 static inline unsigned int ocfs2_pages_per_cluster(struct super_block *sb) 904 { 905 unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; 906 unsigned int pages_per_cluster = 1; 907 908 if (PAGE_SHIFT < cbits) 909 pages_per_cluster = 1 << (cbits - PAGE_SHIFT); 910 911 return pages_per_cluster; 912 } 913 914 static inline unsigned int ocfs2_megabytes_to_clusters(struct super_block *sb, 915 unsigned int megs) 916 { 917 BUILD_BUG_ON(OCFS2_MAX_CLUSTERSIZE > 1048576); 918 919 return megs << (20 - OCFS2_SB(sb)->s_clustersize_bits); 920 } 921 922 static inline unsigned int ocfs2_clusters_to_megabytes(struct super_block *sb, 923 unsigned int clusters) 924 { 925 return clusters >> (20 - OCFS2_SB(sb)->s_clustersize_bits); 926 } 927 928 static inline void _ocfs2_set_bit(unsigned int bit, unsigned long *bitmap) 929 { 930 __set_bit_le(bit, bitmap); 931 } 932 #define ocfs2_set_bit(bit, addr) _ocfs2_set_bit((bit), (unsigned long *)(addr)) 933 934 static inline void _ocfs2_clear_bit(unsigned int bit, unsigned long *bitmap) 935 { 936 __clear_bit_le(bit, bitmap); 937 } 938 #define ocfs2_clear_bit(bit, addr) _ocfs2_clear_bit((bit), (unsigned long *)(addr)) 939 940 #define ocfs2_test_bit test_bit_le 941 #define ocfs2_find_next_zero_bit find_next_zero_bit_le 942 #define ocfs2_find_next_bit find_next_bit_le 943 944 static inline void *correct_addr_and_bit_unaligned(int *bit, void *addr) 945 { 946 #if BITS_PER_LONG == 64 947 *bit += ((unsigned long) addr & 7UL) << 3; 948 addr = (void *) ((unsigned long) addr & ~7UL); 949 #elif BITS_PER_LONG == 32 950 *bit += ((unsigned long) addr & 3UL) << 3; 951 addr = (void *) ((unsigned long) addr & ~3UL); 952 #else 953 #error "how many bits you are?!" 954 #endif 955 return addr; 956 } 957 958 static inline void ocfs2_set_bit_unaligned(int bit, void *bitmap) 959 { 960 bitmap = correct_addr_and_bit_unaligned(&bit, bitmap); 961 ocfs2_set_bit(bit, bitmap); 962 } 963 964 static inline void ocfs2_clear_bit_unaligned(int bit, void *bitmap) 965 { 966 bitmap = correct_addr_and_bit_unaligned(&bit, bitmap); 967 ocfs2_clear_bit(bit, bitmap); 968 } 969 970 static inline int ocfs2_test_bit_unaligned(int bit, void *bitmap) 971 { 972 bitmap = correct_addr_and_bit_unaligned(&bit, bitmap); 973 return ocfs2_test_bit(bit, bitmap); 974 } 975 976 static inline int ocfs2_find_next_zero_bit_unaligned(void *bitmap, int max, 977 int start) 978 { 979 int fix = 0, ret, tmpmax; 980 bitmap = correct_addr_and_bit_unaligned(&fix, bitmap); 981 tmpmax = max + fix; 982 start += fix; 983 984 ret = ocfs2_find_next_zero_bit(bitmap, tmpmax, start) - fix; 985 if (ret > max) 986 return max; 987 return ret; 988 } 989 990 #endif /* OCFS2_H */ 991 992