1 /* -*- mode: c; c-basic-offset: 8; -*- 2 * vim: noexpandtab sw=8 ts=8 sts=0: 3 * 4 * ocfs2.h 5 * 6 * Defines macros and structures used in OCFS2 7 * 8 * Copyright (C) 2002, 2004 Oracle. All rights reserved. 9 * 10 * This program is free software; you can redistribute it and/or 11 * modify it under the terms of the GNU General Public 12 * License as published by the Free Software Foundation; either 13 * version 2 of the License, or (at your option) any later version. 14 * 15 * This program is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 18 * General Public License for more details. 19 * 20 * You should have received a copy of the GNU General Public 21 * License along with this program; if not, write to the 22 * Free Software Foundation, Inc., 59 Temple Place - Suite 330, 23 * Boston, MA 021110-1307, USA. 24 */ 25 26 #ifndef OCFS2_H 27 #define OCFS2_H 28 29 #include <linux/spinlock.h> 30 #include <linux/sched.h> 31 #include <linux/wait.h> 32 #include <linux/list.h> 33 #include <linux/llist.h> 34 #include <linux/rbtree.h> 35 #include <linux/workqueue.h> 36 #include <linux/kref.h> 37 #include <linux/mutex.h> 38 #include <linux/lockdep.h> 39 #include <linux/jbd2.h> 40 41 /* For union ocfs2_dlm_lksb */ 42 #include "stackglue.h" 43 44 #include "ocfs2_fs.h" 45 #include "ocfs2_lockid.h" 46 #include "ocfs2_ioctl.h" 47 48 /* For struct ocfs2_blockcheck_stats */ 49 #include "blockcheck.h" 50 51 #include "reservations.h" 52 53 /* Caching of metadata buffers */ 54 55 /* Most user visible OCFS2 inodes will have very few pieces of 56 * metadata, but larger files (including bitmaps, etc) must be taken 57 * into account when designing an access scheme. We allow a small 58 * amount of inlined blocks to be stored on an array and grow the 59 * structure into a rb tree when necessary. */ 60 #define OCFS2_CACHE_INFO_MAX_ARRAY 2 61 62 /* Flags for ocfs2_caching_info */ 63 64 enum ocfs2_caching_info_flags { 65 /* Indicates that the metadata cache is using the inline array */ 66 OCFS2_CACHE_FL_INLINE = 1<<1, 67 }; 68 69 struct ocfs2_caching_operations; 70 struct ocfs2_caching_info { 71 /* 72 * The parent structure provides the locks, but because the 73 * parent structure can differ, it provides locking operations 74 * to struct ocfs2_caching_info. 75 */ 76 const struct ocfs2_caching_operations *ci_ops; 77 78 /* next two are protected by trans_inc_lock */ 79 /* which transaction were we created on? Zero if none. */ 80 unsigned long ci_created_trans; 81 /* last transaction we were a part of. */ 82 unsigned long ci_last_trans; 83 84 /* Cache structures */ 85 unsigned int ci_flags; 86 unsigned int ci_num_cached; 87 union { 88 sector_t ci_array[OCFS2_CACHE_INFO_MAX_ARRAY]; 89 struct rb_root ci_tree; 90 } ci_cache; 91 }; 92 /* 93 * Need this prototype here instead of in uptodate.h because journal.h 94 * uses it. 95 */ 96 struct super_block *ocfs2_metadata_cache_get_super(struct ocfs2_caching_info *ci); 97 98 /* this limits us to 256 nodes 99 * if we need more, we can do a kmalloc for the map */ 100 #define OCFS2_NODE_MAP_MAX_NODES 256 101 struct ocfs2_node_map { 102 u16 num_nodes; 103 unsigned long map[BITS_TO_LONGS(OCFS2_NODE_MAP_MAX_NODES)]; 104 }; 105 106 enum ocfs2_ast_action { 107 OCFS2_AST_INVALID = 0, 108 OCFS2_AST_ATTACH, 109 OCFS2_AST_CONVERT, 110 OCFS2_AST_DOWNCONVERT, 111 }; 112 113 /* actions for an unlockast function to take. */ 114 enum ocfs2_unlock_action { 115 OCFS2_UNLOCK_INVALID = 0, 116 OCFS2_UNLOCK_CANCEL_CONVERT, 117 OCFS2_UNLOCK_DROP_LOCK, 118 }; 119 120 /* ocfs2_lock_res->l_flags flags. */ 121 #define OCFS2_LOCK_ATTACHED (0x00000001) /* we have initialized 122 * the lvb */ 123 #define OCFS2_LOCK_BUSY (0x00000002) /* we are currently in 124 * dlm_lock */ 125 #define OCFS2_LOCK_BLOCKED (0x00000004) /* blocked waiting to 126 * downconvert*/ 127 #define OCFS2_LOCK_LOCAL (0x00000008) /* newly created inode */ 128 #define OCFS2_LOCK_NEEDS_REFRESH (0x00000010) 129 #define OCFS2_LOCK_REFRESHING (0x00000020) 130 #define OCFS2_LOCK_INITIALIZED (0x00000040) /* track initialization 131 * for shutdown paths */ 132 #define OCFS2_LOCK_FREEING (0x00000080) /* help dlmglue track 133 * when to skip queueing 134 * a lock because it's 135 * about to be 136 * dropped. */ 137 #define OCFS2_LOCK_QUEUED (0x00000100) /* queued for downconvert */ 138 #define OCFS2_LOCK_NOCACHE (0x00000200) /* don't use a holder count */ 139 #define OCFS2_LOCK_PENDING (0x00000400) /* This lockres is pending a 140 call to dlm_lock. Only 141 exists with BUSY set. */ 142 #define OCFS2_LOCK_UPCONVERT_FINISHING (0x00000800) /* blocks the dc thread 143 * from downconverting 144 * before the upconvert 145 * has completed */ 146 147 #define OCFS2_LOCK_NONBLOCK_FINISHED (0x00001000) /* NONBLOCK cluster 148 * lock has already 149 * returned, do not block 150 * dc thread from 151 * downconverting */ 152 153 struct ocfs2_lock_res_ops; 154 155 typedef void (*ocfs2_lock_callback)(int status, unsigned long data); 156 157 #ifdef CONFIG_OCFS2_FS_STATS 158 struct ocfs2_lock_stats { 159 u64 ls_total; /* Total wait in NSEC */ 160 u32 ls_gets; /* Num acquires */ 161 u32 ls_fail; /* Num failed acquires */ 162 163 /* Storing max wait in usecs saves 24 bytes per inode */ 164 u32 ls_max; /* Max wait in USEC */ 165 }; 166 #endif 167 168 struct ocfs2_lock_res { 169 void *l_priv; 170 struct ocfs2_lock_res_ops *l_ops; 171 172 173 struct list_head l_blocked_list; 174 struct list_head l_mask_waiters; 175 struct list_head l_holders; 176 177 unsigned long l_flags; 178 char l_name[OCFS2_LOCK_ID_MAX_LEN]; 179 unsigned int l_ro_holders; 180 unsigned int l_ex_holders; 181 signed char l_level; 182 signed char l_requested; 183 signed char l_blocking; 184 185 /* Data packed - type enum ocfs2_lock_type */ 186 unsigned char l_type; 187 188 /* used from AST/BAST funcs. */ 189 /* Data packed - enum type ocfs2_ast_action */ 190 unsigned char l_action; 191 /* Data packed - enum type ocfs2_unlock_action */ 192 unsigned char l_unlock_action; 193 unsigned int l_pending_gen; 194 195 spinlock_t l_lock; 196 197 struct ocfs2_dlm_lksb l_lksb; 198 199 wait_queue_head_t l_event; 200 201 struct list_head l_debug_list; 202 203 #ifdef CONFIG_OCFS2_FS_STATS 204 struct ocfs2_lock_stats l_lock_prmode; /* PR mode stats */ 205 u32 l_lock_refresh; /* Disk refreshes */ 206 struct ocfs2_lock_stats l_lock_exmode; /* EX mode stats */ 207 #endif 208 #ifdef CONFIG_DEBUG_LOCK_ALLOC 209 struct lockdep_map l_lockdep_map; 210 #endif 211 }; 212 213 enum ocfs2_orphan_reco_type { 214 ORPHAN_NO_NEED_TRUNCATE = 0, 215 ORPHAN_NEED_TRUNCATE, 216 }; 217 218 enum ocfs2_orphan_scan_state { 219 ORPHAN_SCAN_ACTIVE, 220 ORPHAN_SCAN_INACTIVE 221 }; 222 223 struct ocfs2_orphan_scan { 224 struct mutex os_lock; 225 struct ocfs2_super *os_osb; 226 struct ocfs2_lock_res os_lockres; /* lock to synchronize scans */ 227 struct delayed_work os_orphan_scan_work; 228 time64_t os_scantime; /* time this node ran the scan */ 229 u32 os_count; /* tracks node specific scans */ 230 u32 os_seqno; /* tracks cluster wide scans */ 231 atomic_t os_state; /* ACTIVE or INACTIVE */ 232 }; 233 234 struct ocfs2_dlm_debug { 235 struct kref d_refcnt; 236 struct dentry *d_locking_state; 237 struct list_head d_lockres_tracking; 238 }; 239 240 enum ocfs2_vol_state 241 { 242 VOLUME_INIT = 0, 243 VOLUME_MOUNTED, 244 VOLUME_MOUNTED_QUOTAS, 245 VOLUME_DISMOUNTED, 246 VOLUME_DISABLED 247 }; 248 249 struct ocfs2_alloc_stats 250 { 251 atomic_t moves; 252 atomic_t local_data; 253 atomic_t bitmap_data; 254 atomic_t bg_allocs; 255 atomic_t bg_extends; 256 }; 257 258 enum ocfs2_local_alloc_state 259 { 260 OCFS2_LA_UNUSED = 0, /* Local alloc will never be used for 261 * this mountpoint. */ 262 OCFS2_LA_ENABLED, /* Local alloc is in use. */ 263 OCFS2_LA_THROTTLED, /* Local alloc is in use, but number 264 * of bits has been reduced. */ 265 OCFS2_LA_DISABLED /* Local alloc has temporarily been 266 * disabled. */ 267 }; 268 269 enum ocfs2_mount_options 270 { 271 OCFS2_MOUNT_HB_LOCAL = 1 << 0, /* Local heartbeat */ 272 OCFS2_MOUNT_BARRIER = 1 << 1, /* Use block barriers */ 273 OCFS2_MOUNT_NOINTR = 1 << 2, /* Don't catch signals */ 274 OCFS2_MOUNT_ERRORS_PANIC = 1 << 3, /* Panic on errors */ 275 OCFS2_MOUNT_DATA_WRITEBACK = 1 << 4, /* No data ordering */ 276 OCFS2_MOUNT_LOCALFLOCKS = 1 << 5, /* No cluster aware user file locks */ 277 OCFS2_MOUNT_NOUSERXATTR = 1 << 6, /* No user xattr */ 278 OCFS2_MOUNT_INODE64 = 1 << 7, /* Allow inode numbers > 2^32 */ 279 OCFS2_MOUNT_POSIX_ACL = 1 << 8, /* Force POSIX access control lists */ 280 OCFS2_MOUNT_NO_POSIX_ACL = 1 << 9, /* Disable POSIX access 281 control lists */ 282 OCFS2_MOUNT_USRQUOTA = 1 << 10, /* We support user quotas */ 283 OCFS2_MOUNT_GRPQUOTA = 1 << 11, /* We support group quotas */ 284 OCFS2_MOUNT_COHERENCY_BUFFERED = 1 << 12, /* Allow concurrent O_DIRECT 285 writes */ 286 OCFS2_MOUNT_HB_NONE = 1 << 13, /* No heartbeat */ 287 OCFS2_MOUNT_HB_GLOBAL = 1 << 14, /* Global heartbeat */ 288 289 OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT = 1 << 15, /* Journal Async Commit */ 290 OCFS2_MOUNT_ERRORS_CONT = 1 << 16, /* Return EIO to the calling process on error */ 291 OCFS2_MOUNT_ERRORS_ROFS = 1 << 17, /* Change filesystem to read-only on error */ 292 }; 293 294 #define OCFS2_OSB_SOFT_RO 0x0001 295 #define OCFS2_OSB_HARD_RO 0x0002 296 #define OCFS2_OSB_ERROR_FS 0x0004 297 #define OCFS2_DEFAULT_ATIME_QUANTUM 60 298 299 struct ocfs2_journal; 300 struct ocfs2_slot_info; 301 struct ocfs2_recovery_map; 302 struct ocfs2_replay_map; 303 struct ocfs2_quota_recovery; 304 struct ocfs2_super 305 { 306 struct task_struct *commit_task; 307 struct super_block *sb; 308 struct inode *root_inode; 309 struct inode *sys_root_inode; 310 struct inode *global_system_inodes[NUM_GLOBAL_SYSTEM_INODES]; 311 struct inode **local_system_inodes; 312 313 struct ocfs2_slot_info *slot_info; 314 315 u32 *slot_recovery_generations; 316 317 spinlock_t node_map_lock; 318 319 u64 root_blkno; 320 u64 system_dir_blkno; 321 u64 bitmap_blkno; 322 u32 bitmap_cpg; 323 u8 *uuid; 324 char *uuid_str; 325 u32 uuid_hash; 326 u8 *vol_label; 327 u64 first_cluster_group_blkno; 328 u32 fs_generation; 329 330 u32 s_feature_compat; 331 u32 s_feature_incompat; 332 u32 s_feature_ro_compat; 333 334 /* Protects s_next_generation, osb_flags and s_inode_steal_slot. 335 * Could protect more on osb as it's very short lived. 336 */ 337 spinlock_t osb_lock; 338 u32 s_next_generation; 339 unsigned long osb_flags; 340 s16 s_inode_steal_slot; 341 s16 s_meta_steal_slot; 342 atomic_t s_num_inodes_stolen; 343 atomic_t s_num_meta_stolen; 344 345 unsigned long s_mount_opt; 346 unsigned int s_atime_quantum; 347 348 unsigned int max_slots; 349 unsigned int node_num; 350 int slot_num; 351 int preferred_slot; 352 int s_sectsize_bits; 353 int s_clustersize; 354 int s_clustersize_bits; 355 unsigned int s_xattr_inline_size; 356 357 atomic_t vol_state; 358 struct mutex recovery_lock; 359 struct ocfs2_recovery_map *recovery_map; 360 struct ocfs2_replay_map *replay_map; 361 struct task_struct *recovery_thread_task; 362 int disable_recovery; 363 wait_queue_head_t checkpoint_event; 364 struct ocfs2_journal *journal; 365 unsigned long osb_commit_interval; 366 367 struct delayed_work la_enable_wq; 368 369 /* 370 * Must hold local alloc i_mutex and osb->osb_lock to change 371 * local_alloc_bits. Reads can be done under either lock. 372 */ 373 unsigned int local_alloc_bits; 374 unsigned int local_alloc_default_bits; 375 /* osb_clusters_at_boot can become stale! Do not trust it to 376 * be up to date. */ 377 unsigned int osb_clusters_at_boot; 378 379 enum ocfs2_local_alloc_state local_alloc_state; /* protected 380 * by osb_lock */ 381 382 struct buffer_head *local_alloc_bh; 383 384 u64 la_last_gd; 385 386 struct ocfs2_reservation_map osb_la_resmap; 387 388 unsigned int osb_resv_level; 389 unsigned int osb_dir_resv_level; 390 391 /* Next three fields are for local node slot recovery during 392 * mount. */ 393 int dirty; 394 struct ocfs2_dinode *local_alloc_copy; 395 struct ocfs2_quota_recovery *quota_rec; 396 397 struct ocfs2_blockcheck_stats osb_ecc_stats; 398 struct ocfs2_alloc_stats alloc_stats; 399 char dev_str[20]; /* "major,minor" of the device */ 400 401 u8 osb_stackflags; 402 403 char osb_cluster_stack[OCFS2_STACK_LABEL_LEN + 1]; 404 char osb_cluster_name[OCFS2_CLUSTER_NAME_LEN + 1]; 405 struct ocfs2_cluster_connection *cconn; 406 struct ocfs2_lock_res osb_super_lockres; 407 struct ocfs2_lock_res osb_rename_lockres; 408 struct ocfs2_lock_res osb_nfs_sync_lockres; 409 struct ocfs2_dlm_debug *osb_dlm_debug; 410 411 struct dentry *osb_debug_root; 412 struct dentry *osb_ctxt; 413 414 wait_queue_head_t recovery_event; 415 416 spinlock_t dc_task_lock; 417 struct task_struct *dc_task; 418 wait_queue_head_t dc_event; 419 unsigned long dc_wake_sequence; 420 unsigned long dc_work_sequence; 421 422 /* 423 * Any thread can add locks to the list, but the downconvert 424 * thread is the only one allowed to remove locks. Any change 425 * to this rule requires updating 426 * ocfs2_downconvert_thread_do_work(). 427 */ 428 struct list_head blocked_lock_list; 429 unsigned long blocked_lock_count; 430 431 /* List of dquot structures to drop last reference to */ 432 struct llist_head dquot_drop_list; 433 struct work_struct dquot_drop_work; 434 435 wait_queue_head_t osb_mount_event; 436 437 /* Truncate log info */ 438 struct inode *osb_tl_inode; 439 struct buffer_head *osb_tl_bh; 440 struct delayed_work osb_truncate_log_wq; 441 atomic_t osb_tl_disable; 442 /* 443 * How many clusters in our truncate log. 444 * It must be protected by osb_tl_inode->i_mutex. 445 */ 446 unsigned int truncated_clusters; 447 448 struct ocfs2_node_map osb_recovering_orphan_dirs; 449 unsigned int *osb_orphan_wipes; 450 wait_queue_head_t osb_wipe_event; 451 452 struct ocfs2_orphan_scan osb_orphan_scan; 453 454 /* used to protect metaecc calculation check of xattr. */ 455 spinlock_t osb_xattr_lock; 456 457 unsigned int osb_dx_mask; 458 u32 osb_dx_seed[4]; 459 460 /* the group we used to allocate inodes. */ 461 u64 osb_inode_alloc_group; 462 463 /* rb tree root for refcount lock. */ 464 struct rb_root osb_rf_lock_tree; 465 struct ocfs2_refcount_tree *osb_ref_tree_lru; 466 467 struct mutex system_file_mutex; 468 469 /* 470 * OCFS2 needs to schedule several different types of work which 471 * require cluster locking, disk I/O, recovery waits, etc. Since these 472 * types of work tend to be heavy we avoid using the kernel events 473 * workqueue and schedule on our own. 474 */ 475 struct workqueue_struct *ocfs2_wq; 476 }; 477 478 #define OCFS2_SB(sb) ((struct ocfs2_super *)(sb)->s_fs_info) 479 480 /* Useful typedef for passing around journal access functions */ 481 typedef int (*ocfs2_journal_access_func)(handle_t *handle, 482 struct ocfs2_caching_info *ci, 483 struct buffer_head *bh, int type); 484 485 static inline int ocfs2_should_order_data(struct inode *inode) 486 { 487 if (!S_ISREG(inode->i_mode)) 488 return 0; 489 if (OCFS2_SB(inode->i_sb)->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) 490 return 0; 491 return 1; 492 } 493 494 static inline int ocfs2_sparse_alloc(struct ocfs2_super *osb) 495 { 496 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC) 497 return 1; 498 return 0; 499 } 500 501 static inline int ocfs2_writes_unwritten_extents(struct ocfs2_super *osb) 502 { 503 /* 504 * Support for sparse files is a pre-requisite 505 */ 506 if (!ocfs2_sparse_alloc(osb)) 507 return 0; 508 509 if (osb->s_feature_ro_compat & OCFS2_FEATURE_RO_COMPAT_UNWRITTEN) 510 return 1; 511 return 0; 512 } 513 514 static inline int ocfs2_supports_append_dio(struct ocfs2_super *osb) 515 { 516 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_APPEND_DIO) 517 return 1; 518 return 0; 519 } 520 521 522 static inline int ocfs2_supports_inline_data(struct ocfs2_super *osb) 523 { 524 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INLINE_DATA) 525 return 1; 526 return 0; 527 } 528 529 static inline int ocfs2_supports_xattr(struct ocfs2_super *osb) 530 { 531 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_XATTR) 532 return 1; 533 return 0; 534 } 535 536 static inline int ocfs2_meta_ecc(struct ocfs2_super *osb) 537 { 538 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_META_ECC) 539 return 1; 540 return 0; 541 } 542 543 static inline int ocfs2_supports_indexed_dirs(struct ocfs2_super *osb) 544 { 545 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INDEXED_DIRS) 546 return 1; 547 return 0; 548 } 549 550 static inline int ocfs2_supports_discontig_bg(struct ocfs2_super *osb) 551 { 552 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_DISCONTIG_BG) 553 return 1; 554 return 0; 555 } 556 557 static inline unsigned int ocfs2_link_max(struct ocfs2_super *osb) 558 { 559 if (ocfs2_supports_indexed_dirs(osb)) 560 return OCFS2_DX_LINK_MAX; 561 return OCFS2_LINK_MAX; 562 } 563 564 static inline unsigned int ocfs2_read_links_count(struct ocfs2_dinode *di) 565 { 566 u32 nlink = le16_to_cpu(di->i_links_count); 567 u32 hi = le16_to_cpu(di->i_links_count_hi); 568 569 if (di->i_dyn_features & cpu_to_le16(OCFS2_INDEXED_DIR_FL)) 570 nlink |= (hi << OCFS2_LINKS_HI_SHIFT); 571 572 return nlink; 573 } 574 575 static inline void ocfs2_set_links_count(struct ocfs2_dinode *di, u32 nlink) 576 { 577 u16 lo, hi; 578 579 lo = nlink; 580 hi = nlink >> OCFS2_LINKS_HI_SHIFT; 581 582 di->i_links_count = cpu_to_le16(lo); 583 di->i_links_count_hi = cpu_to_le16(hi); 584 } 585 586 static inline void ocfs2_add_links_count(struct ocfs2_dinode *di, int n) 587 { 588 u32 links = ocfs2_read_links_count(di); 589 590 links += n; 591 592 ocfs2_set_links_count(di, links); 593 } 594 595 static inline int ocfs2_refcount_tree(struct ocfs2_super *osb) 596 { 597 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_REFCOUNT_TREE) 598 return 1; 599 return 0; 600 } 601 602 /* set / clear functions because cluster events can make these happen 603 * in parallel so we want the transitions to be atomic. this also 604 * means that any future flags osb_flags must be protected by spinlock 605 * too! */ 606 static inline void ocfs2_set_osb_flag(struct ocfs2_super *osb, 607 unsigned long flag) 608 { 609 spin_lock(&osb->osb_lock); 610 osb->osb_flags |= flag; 611 spin_unlock(&osb->osb_lock); 612 } 613 614 static inline void ocfs2_set_ro_flag(struct ocfs2_super *osb, 615 int hard) 616 { 617 spin_lock(&osb->osb_lock); 618 osb->osb_flags &= ~(OCFS2_OSB_SOFT_RO|OCFS2_OSB_HARD_RO); 619 if (hard) 620 osb->osb_flags |= OCFS2_OSB_HARD_RO; 621 else 622 osb->osb_flags |= OCFS2_OSB_SOFT_RO; 623 spin_unlock(&osb->osb_lock); 624 } 625 626 static inline int ocfs2_is_hard_readonly(struct ocfs2_super *osb) 627 { 628 int ret; 629 630 spin_lock(&osb->osb_lock); 631 ret = osb->osb_flags & OCFS2_OSB_HARD_RO; 632 spin_unlock(&osb->osb_lock); 633 634 return ret; 635 } 636 637 static inline int ocfs2_is_soft_readonly(struct ocfs2_super *osb) 638 { 639 int ret; 640 641 spin_lock(&osb->osb_lock); 642 ret = osb->osb_flags & OCFS2_OSB_SOFT_RO; 643 spin_unlock(&osb->osb_lock); 644 645 return ret; 646 } 647 648 static inline int ocfs2_clusterinfo_valid(struct ocfs2_super *osb) 649 { 650 return (osb->s_feature_incompat & 651 (OCFS2_FEATURE_INCOMPAT_USERSPACE_STACK | 652 OCFS2_FEATURE_INCOMPAT_CLUSTERINFO)); 653 } 654 655 static inline int ocfs2_userspace_stack(struct ocfs2_super *osb) 656 { 657 if (ocfs2_clusterinfo_valid(osb) && 658 memcmp(osb->osb_cluster_stack, OCFS2_CLASSIC_CLUSTER_STACK, 659 OCFS2_STACK_LABEL_LEN)) 660 return 1; 661 return 0; 662 } 663 664 static inline int ocfs2_o2cb_stack(struct ocfs2_super *osb) 665 { 666 if (ocfs2_clusterinfo_valid(osb) && 667 !memcmp(osb->osb_cluster_stack, OCFS2_CLASSIC_CLUSTER_STACK, 668 OCFS2_STACK_LABEL_LEN)) 669 return 1; 670 return 0; 671 } 672 673 static inline int ocfs2_cluster_o2cb_global_heartbeat(struct ocfs2_super *osb) 674 { 675 return ocfs2_o2cb_stack(osb) && 676 (osb->osb_stackflags & OCFS2_CLUSTER_O2CB_GLOBAL_HEARTBEAT); 677 } 678 679 static inline int ocfs2_mount_local(struct ocfs2_super *osb) 680 { 681 return (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT); 682 } 683 684 static inline int ocfs2_uses_extended_slot_map(struct ocfs2_super *osb) 685 { 686 return (osb->s_feature_incompat & 687 OCFS2_FEATURE_INCOMPAT_EXTENDED_SLOT_MAP); 688 } 689 690 691 #define OCFS2_IS_VALID_DINODE(ptr) \ 692 (!strcmp((ptr)->i_signature, OCFS2_INODE_SIGNATURE)) 693 694 #define OCFS2_IS_VALID_EXTENT_BLOCK(ptr) \ 695 (!strcmp((ptr)->h_signature, OCFS2_EXTENT_BLOCK_SIGNATURE)) 696 697 #define OCFS2_IS_VALID_GROUP_DESC(ptr) \ 698 (!strcmp((ptr)->bg_signature, OCFS2_GROUP_DESC_SIGNATURE)) 699 700 701 #define OCFS2_IS_VALID_XATTR_BLOCK(ptr) \ 702 (!strcmp((ptr)->xb_signature, OCFS2_XATTR_BLOCK_SIGNATURE)) 703 704 #define OCFS2_IS_VALID_DIR_TRAILER(ptr) \ 705 (!strcmp((ptr)->db_signature, OCFS2_DIR_TRAILER_SIGNATURE)) 706 707 #define OCFS2_IS_VALID_DX_ROOT(ptr) \ 708 (!strcmp((ptr)->dr_signature, OCFS2_DX_ROOT_SIGNATURE)) 709 710 #define OCFS2_IS_VALID_DX_LEAF(ptr) \ 711 (!strcmp((ptr)->dl_signature, OCFS2_DX_LEAF_SIGNATURE)) 712 713 #define OCFS2_IS_VALID_REFCOUNT_BLOCK(ptr) \ 714 (!strcmp((ptr)->rf_signature, OCFS2_REFCOUNT_BLOCK_SIGNATURE)) 715 716 static inline unsigned long ino_from_blkno(struct super_block *sb, 717 u64 blkno) 718 { 719 return (unsigned long)(blkno & (u64)ULONG_MAX); 720 } 721 722 static inline u64 ocfs2_clusters_to_blocks(struct super_block *sb, 723 u32 clusters) 724 { 725 int c_to_b_bits = OCFS2_SB(sb)->s_clustersize_bits - 726 sb->s_blocksize_bits; 727 728 return (u64)clusters << c_to_b_bits; 729 } 730 731 static inline u32 ocfs2_clusters_for_blocks(struct super_block *sb, 732 u64 blocks) 733 { 734 int b_to_c_bits = OCFS2_SB(sb)->s_clustersize_bits - 735 sb->s_blocksize_bits; 736 737 blocks += (1 << b_to_c_bits) - 1; 738 return (u32)(blocks >> b_to_c_bits); 739 } 740 741 static inline u32 ocfs2_blocks_to_clusters(struct super_block *sb, 742 u64 blocks) 743 { 744 int b_to_c_bits = OCFS2_SB(sb)->s_clustersize_bits - 745 sb->s_blocksize_bits; 746 747 return (u32)(blocks >> b_to_c_bits); 748 } 749 750 static inline unsigned int ocfs2_clusters_for_bytes(struct super_block *sb, 751 u64 bytes) 752 { 753 int cl_bits = OCFS2_SB(sb)->s_clustersize_bits; 754 unsigned int clusters; 755 756 bytes += OCFS2_SB(sb)->s_clustersize - 1; 757 /* OCFS2 just cannot have enough clusters to overflow this */ 758 clusters = (unsigned int)(bytes >> cl_bits); 759 760 return clusters; 761 } 762 763 static inline unsigned int ocfs2_bytes_to_clusters(struct super_block *sb, 764 u64 bytes) 765 { 766 int cl_bits = OCFS2_SB(sb)->s_clustersize_bits; 767 unsigned int clusters; 768 769 clusters = (unsigned int)(bytes >> cl_bits); 770 return clusters; 771 } 772 773 static inline u64 ocfs2_blocks_for_bytes(struct super_block *sb, 774 u64 bytes) 775 { 776 bytes += sb->s_blocksize - 1; 777 return bytes >> sb->s_blocksize_bits; 778 } 779 780 static inline u64 ocfs2_clusters_to_bytes(struct super_block *sb, 781 u32 clusters) 782 { 783 return (u64)clusters << OCFS2_SB(sb)->s_clustersize_bits; 784 } 785 786 static inline u64 ocfs2_block_to_cluster_start(struct super_block *sb, 787 u64 blocks) 788 { 789 int bits = OCFS2_SB(sb)->s_clustersize_bits - sb->s_blocksize_bits; 790 unsigned int clusters; 791 792 clusters = ocfs2_blocks_to_clusters(sb, blocks); 793 return (u64)clusters << bits; 794 } 795 796 static inline u64 ocfs2_align_bytes_to_clusters(struct super_block *sb, 797 u64 bytes) 798 { 799 int cl_bits = OCFS2_SB(sb)->s_clustersize_bits; 800 unsigned int clusters; 801 802 clusters = ocfs2_clusters_for_bytes(sb, bytes); 803 return (u64)clusters << cl_bits; 804 } 805 806 static inline u64 ocfs2_align_bytes_to_blocks(struct super_block *sb, 807 u64 bytes) 808 { 809 u64 blocks; 810 811 blocks = ocfs2_blocks_for_bytes(sb, bytes); 812 return blocks << sb->s_blocksize_bits; 813 } 814 815 static inline unsigned long ocfs2_align_bytes_to_sectors(u64 bytes) 816 { 817 return (unsigned long)((bytes + 511) >> 9); 818 } 819 820 static inline unsigned int ocfs2_page_index_to_clusters(struct super_block *sb, 821 unsigned long pg_index) 822 { 823 u32 clusters = pg_index; 824 unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; 825 826 if (unlikely(PAGE_SHIFT > cbits)) 827 clusters = pg_index << (PAGE_SHIFT - cbits); 828 else if (PAGE_SHIFT < cbits) 829 clusters = pg_index >> (cbits - PAGE_SHIFT); 830 831 return clusters; 832 } 833 834 /* 835 * Find the 1st page index which covers the given clusters. 836 */ 837 static inline pgoff_t ocfs2_align_clusters_to_page_index(struct super_block *sb, 838 u32 clusters) 839 { 840 unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; 841 pgoff_t index = clusters; 842 843 if (PAGE_SHIFT > cbits) { 844 index = (pgoff_t)clusters >> (PAGE_SHIFT - cbits); 845 } else if (PAGE_SHIFT < cbits) { 846 index = (pgoff_t)clusters << (cbits - PAGE_SHIFT); 847 } 848 849 return index; 850 } 851 852 static inline unsigned int ocfs2_pages_per_cluster(struct super_block *sb) 853 { 854 unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; 855 unsigned int pages_per_cluster = 1; 856 857 if (PAGE_SHIFT < cbits) 858 pages_per_cluster = 1 << (cbits - PAGE_SHIFT); 859 860 return pages_per_cluster; 861 } 862 863 static inline unsigned int ocfs2_megabytes_to_clusters(struct super_block *sb, 864 unsigned int megs) 865 { 866 BUILD_BUG_ON(OCFS2_MAX_CLUSTERSIZE > 1048576); 867 868 return megs << (20 - OCFS2_SB(sb)->s_clustersize_bits); 869 } 870 871 static inline unsigned int ocfs2_clusters_to_megabytes(struct super_block *sb, 872 unsigned int clusters) 873 { 874 return clusters >> (20 - OCFS2_SB(sb)->s_clustersize_bits); 875 } 876 877 static inline void _ocfs2_set_bit(unsigned int bit, unsigned long *bitmap) 878 { 879 __set_bit_le(bit, bitmap); 880 } 881 #define ocfs2_set_bit(bit, addr) _ocfs2_set_bit((bit), (unsigned long *)(addr)) 882 883 static inline void _ocfs2_clear_bit(unsigned int bit, unsigned long *bitmap) 884 { 885 __clear_bit_le(bit, bitmap); 886 } 887 #define ocfs2_clear_bit(bit, addr) _ocfs2_clear_bit((bit), (unsigned long *)(addr)) 888 889 #define ocfs2_test_bit test_bit_le 890 #define ocfs2_find_next_zero_bit find_next_zero_bit_le 891 #define ocfs2_find_next_bit find_next_bit_le 892 893 static inline void *correct_addr_and_bit_unaligned(int *bit, void *addr) 894 { 895 #if BITS_PER_LONG == 64 896 *bit += ((unsigned long) addr & 7UL) << 3; 897 addr = (void *) ((unsigned long) addr & ~7UL); 898 #elif BITS_PER_LONG == 32 899 *bit += ((unsigned long) addr & 3UL) << 3; 900 addr = (void *) ((unsigned long) addr & ~3UL); 901 #else 902 #error "how many bits you are?!" 903 #endif 904 return addr; 905 } 906 907 static inline void ocfs2_set_bit_unaligned(int bit, void *bitmap) 908 { 909 bitmap = correct_addr_and_bit_unaligned(&bit, bitmap); 910 ocfs2_set_bit(bit, bitmap); 911 } 912 913 static inline void ocfs2_clear_bit_unaligned(int bit, void *bitmap) 914 { 915 bitmap = correct_addr_and_bit_unaligned(&bit, bitmap); 916 ocfs2_clear_bit(bit, bitmap); 917 } 918 919 static inline int ocfs2_test_bit_unaligned(int bit, void *bitmap) 920 { 921 bitmap = correct_addr_and_bit_unaligned(&bit, bitmap); 922 return ocfs2_test_bit(bit, bitmap); 923 } 924 925 static inline int ocfs2_find_next_zero_bit_unaligned(void *bitmap, int max, 926 int start) 927 { 928 int fix = 0, ret, tmpmax; 929 bitmap = correct_addr_and_bit_unaligned(&fix, bitmap); 930 tmpmax = max + fix; 931 start += fix; 932 933 ret = ocfs2_find_next_zero_bit(bitmap, tmpmax, start) - fix; 934 if (ret > max) 935 return max; 936 return ret; 937 } 938 939 #endif /* OCFS2_H */ 940 941