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![Jun Piao](/assets/img/avatar_default.png)
clean up some unused functions and parameters. Link: http://lkml.kernel.org/r/598A5E21.2080807@huawei.com Signed-off-by: Jun Piao <piaojun@huawei.com> Reviewed-by: Alex Chen <alex.chen@huawei.com> Cc: Mark Fasheh <mfasheh@versity.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Junxiao Bi <junxiao.bi@oracle.com> Cc: Joseph Qi <jiangqi903@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
938 lines
25 KiB
C
938 lines
25 KiB
C
/* -*- mode: c; c-basic-offset: 8; -*-
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* vim: noexpandtab sw=8 ts=8 sts=0:
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*
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* ocfs2.h
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*
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* Defines macros and structures used in OCFS2
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*
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* Copyright (C) 2002, 2004 Oracle. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this program; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 021110-1307, USA.
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*/
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#ifndef OCFS2_H
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#define OCFS2_H
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#include <linux/spinlock.h>
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#include <linux/sched.h>
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#include <linux/wait.h>
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#include <linux/list.h>
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#include <linux/llist.h>
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#include <linux/rbtree.h>
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#include <linux/workqueue.h>
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#include <linux/kref.h>
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#include <linux/mutex.h>
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#include <linux/lockdep.h>
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#include <linux/jbd2.h>
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/* For union ocfs2_dlm_lksb */
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#include "stackglue.h"
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#include "ocfs2_fs.h"
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#include "ocfs2_lockid.h"
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#include "ocfs2_ioctl.h"
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/* For struct ocfs2_blockcheck_stats */
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#include "blockcheck.h"
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#include "reservations.h"
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/* Caching of metadata buffers */
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/* Most user visible OCFS2 inodes will have very few pieces of
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* metadata, but larger files (including bitmaps, etc) must be taken
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* into account when designing an access scheme. We allow a small
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* amount of inlined blocks to be stored on an array and grow the
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* structure into a rb tree when necessary. */
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#define OCFS2_CACHE_INFO_MAX_ARRAY 2
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/* Flags for ocfs2_caching_info */
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enum ocfs2_caching_info_flags {
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/* Indicates that the metadata cache is using the inline array */
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OCFS2_CACHE_FL_INLINE = 1<<1,
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};
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struct ocfs2_caching_operations;
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struct ocfs2_caching_info {
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/*
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* The parent structure provides the locks, but because the
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* parent structure can differ, it provides locking operations
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* to struct ocfs2_caching_info.
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*/
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const struct ocfs2_caching_operations *ci_ops;
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/* next two are protected by trans_inc_lock */
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/* which transaction were we created on? Zero if none. */
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unsigned long ci_created_trans;
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/* last transaction we were a part of. */
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unsigned long ci_last_trans;
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/* Cache structures */
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unsigned int ci_flags;
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unsigned int ci_num_cached;
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union {
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sector_t ci_array[OCFS2_CACHE_INFO_MAX_ARRAY];
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struct rb_root ci_tree;
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} ci_cache;
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};
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/*
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* Need this prototype here instead of in uptodate.h because journal.h
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* uses it.
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*/
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struct super_block *ocfs2_metadata_cache_get_super(struct ocfs2_caching_info *ci);
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/* this limits us to 256 nodes
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* if we need more, we can do a kmalloc for the map */
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#define OCFS2_NODE_MAP_MAX_NODES 256
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struct ocfs2_node_map {
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u16 num_nodes;
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unsigned long map[BITS_TO_LONGS(OCFS2_NODE_MAP_MAX_NODES)];
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};
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enum ocfs2_ast_action {
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OCFS2_AST_INVALID = 0,
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OCFS2_AST_ATTACH,
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OCFS2_AST_CONVERT,
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OCFS2_AST_DOWNCONVERT,
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};
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/* actions for an unlockast function to take. */
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enum ocfs2_unlock_action {
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OCFS2_UNLOCK_INVALID = 0,
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OCFS2_UNLOCK_CANCEL_CONVERT,
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OCFS2_UNLOCK_DROP_LOCK,
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};
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/* ocfs2_lock_res->l_flags flags. */
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#define OCFS2_LOCK_ATTACHED (0x00000001) /* we have initialized
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* the lvb */
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#define OCFS2_LOCK_BUSY (0x00000002) /* we are currently in
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* dlm_lock */
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#define OCFS2_LOCK_BLOCKED (0x00000004) /* blocked waiting to
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* downconvert*/
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#define OCFS2_LOCK_LOCAL (0x00000008) /* newly created inode */
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#define OCFS2_LOCK_NEEDS_REFRESH (0x00000010)
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#define OCFS2_LOCK_REFRESHING (0x00000020)
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#define OCFS2_LOCK_INITIALIZED (0x00000040) /* track initialization
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* for shutdown paths */
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#define OCFS2_LOCK_FREEING (0x00000080) /* help dlmglue track
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* when to skip queueing
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* a lock because it's
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* about to be
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* dropped. */
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#define OCFS2_LOCK_QUEUED (0x00000100) /* queued for downconvert */
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#define OCFS2_LOCK_NOCACHE (0x00000200) /* don't use a holder count */
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#define OCFS2_LOCK_PENDING (0x00000400) /* This lockres is pending a
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call to dlm_lock. Only
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exists with BUSY set. */
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#define OCFS2_LOCK_UPCONVERT_FINISHING (0x00000800) /* blocks the dc thread
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* from downconverting
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* before the upconvert
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* has completed */
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#define OCFS2_LOCK_NONBLOCK_FINISHED (0x00001000) /* NONBLOCK cluster
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* lock has already
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* returned, do not block
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* dc thread from
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* downconverting */
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struct ocfs2_lock_res_ops;
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typedef void (*ocfs2_lock_callback)(int status, unsigned long data);
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#ifdef CONFIG_OCFS2_FS_STATS
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struct ocfs2_lock_stats {
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u64 ls_total; /* Total wait in NSEC */
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u32 ls_gets; /* Num acquires */
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u32 ls_fail; /* Num failed acquires */
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/* Storing max wait in usecs saves 24 bytes per inode */
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u32 ls_max; /* Max wait in USEC */
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};
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#endif
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struct ocfs2_lock_res {
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void *l_priv;
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struct ocfs2_lock_res_ops *l_ops;
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struct list_head l_blocked_list;
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struct list_head l_mask_waiters;
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struct list_head l_holders;
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unsigned long l_flags;
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char l_name[OCFS2_LOCK_ID_MAX_LEN];
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unsigned int l_ro_holders;
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unsigned int l_ex_holders;
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signed char l_level;
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signed char l_requested;
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signed char l_blocking;
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/* Data packed - type enum ocfs2_lock_type */
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unsigned char l_type;
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/* used from AST/BAST funcs. */
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/* Data packed - enum type ocfs2_ast_action */
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unsigned char l_action;
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/* Data packed - enum type ocfs2_unlock_action */
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unsigned char l_unlock_action;
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unsigned int l_pending_gen;
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spinlock_t l_lock;
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struct ocfs2_dlm_lksb l_lksb;
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wait_queue_head_t l_event;
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struct list_head l_debug_list;
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#ifdef CONFIG_OCFS2_FS_STATS
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struct ocfs2_lock_stats l_lock_prmode; /* PR mode stats */
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u32 l_lock_refresh; /* Disk refreshes */
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struct ocfs2_lock_stats l_lock_exmode; /* EX mode stats */
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#endif
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#ifdef CONFIG_DEBUG_LOCK_ALLOC
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struct lockdep_map l_lockdep_map;
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#endif
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};
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enum ocfs2_orphan_reco_type {
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ORPHAN_NO_NEED_TRUNCATE = 0,
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ORPHAN_NEED_TRUNCATE,
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};
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enum ocfs2_orphan_scan_state {
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ORPHAN_SCAN_ACTIVE,
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ORPHAN_SCAN_INACTIVE
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};
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struct ocfs2_orphan_scan {
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struct mutex os_lock;
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struct ocfs2_super *os_osb;
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struct ocfs2_lock_res os_lockres; /* lock to synchronize scans */
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struct delayed_work os_orphan_scan_work;
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time64_t os_scantime; /* time this node ran the scan */
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u32 os_count; /* tracks node specific scans */
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u32 os_seqno; /* tracks cluster wide scans */
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atomic_t os_state; /* ACTIVE or INACTIVE */
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};
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struct ocfs2_dlm_debug {
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struct kref d_refcnt;
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struct dentry *d_locking_state;
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struct list_head d_lockres_tracking;
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};
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enum ocfs2_vol_state
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{
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VOLUME_INIT = 0,
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VOLUME_MOUNTED,
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VOLUME_MOUNTED_QUOTAS,
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VOLUME_DISMOUNTED,
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VOLUME_DISABLED
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};
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struct ocfs2_alloc_stats
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{
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atomic_t moves;
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atomic_t local_data;
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atomic_t bitmap_data;
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atomic_t bg_allocs;
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atomic_t bg_extends;
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};
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enum ocfs2_local_alloc_state
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{
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OCFS2_LA_UNUSED = 0, /* Local alloc will never be used for
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* this mountpoint. */
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OCFS2_LA_ENABLED, /* Local alloc is in use. */
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OCFS2_LA_THROTTLED, /* Local alloc is in use, but number
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* of bits has been reduced. */
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OCFS2_LA_DISABLED /* Local alloc has temporarily been
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* disabled. */
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};
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enum ocfs2_mount_options
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{
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OCFS2_MOUNT_HB_LOCAL = 1 << 0, /* Local heartbeat */
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OCFS2_MOUNT_BARRIER = 1 << 1, /* Use block barriers */
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OCFS2_MOUNT_NOINTR = 1 << 2, /* Don't catch signals */
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OCFS2_MOUNT_ERRORS_PANIC = 1 << 3, /* Panic on errors */
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OCFS2_MOUNT_DATA_WRITEBACK = 1 << 4, /* No data ordering */
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OCFS2_MOUNT_LOCALFLOCKS = 1 << 5, /* No cluster aware user file locks */
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OCFS2_MOUNT_NOUSERXATTR = 1 << 6, /* No user xattr */
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OCFS2_MOUNT_INODE64 = 1 << 7, /* Allow inode numbers > 2^32 */
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OCFS2_MOUNT_POSIX_ACL = 1 << 8, /* Force POSIX access control lists */
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OCFS2_MOUNT_NO_POSIX_ACL = 1 << 9, /* Disable POSIX access
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control lists */
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OCFS2_MOUNT_USRQUOTA = 1 << 10, /* We support user quotas */
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OCFS2_MOUNT_GRPQUOTA = 1 << 11, /* We support group quotas */
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OCFS2_MOUNT_COHERENCY_BUFFERED = 1 << 12, /* Allow concurrent O_DIRECT
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writes */
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OCFS2_MOUNT_HB_NONE = 1 << 13, /* No heartbeat */
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OCFS2_MOUNT_HB_GLOBAL = 1 << 14, /* Global heartbeat */
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OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT = 1 << 15, /* Journal Async Commit */
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OCFS2_MOUNT_ERRORS_CONT = 1 << 16, /* Return EIO to the calling process on error */
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OCFS2_MOUNT_ERRORS_ROFS = 1 << 17, /* Change filesystem to read-only on error */
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};
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#define OCFS2_OSB_SOFT_RO 0x0001
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#define OCFS2_OSB_HARD_RO 0x0002
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#define OCFS2_OSB_ERROR_FS 0x0004
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#define OCFS2_DEFAULT_ATIME_QUANTUM 60
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struct ocfs2_journal;
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struct ocfs2_slot_info;
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struct ocfs2_recovery_map;
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struct ocfs2_replay_map;
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struct ocfs2_quota_recovery;
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struct ocfs2_super
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{
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struct task_struct *commit_task;
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struct super_block *sb;
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struct inode *root_inode;
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struct inode *sys_root_inode;
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struct inode *global_system_inodes[NUM_GLOBAL_SYSTEM_INODES];
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struct inode **local_system_inodes;
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struct ocfs2_slot_info *slot_info;
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u32 *slot_recovery_generations;
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spinlock_t node_map_lock;
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u64 root_blkno;
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u64 system_dir_blkno;
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u64 bitmap_blkno;
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u32 bitmap_cpg;
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char *uuid_str;
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u32 uuid_hash;
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u8 *vol_label;
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u64 first_cluster_group_blkno;
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u32 fs_generation;
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u32 s_feature_compat;
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u32 s_feature_incompat;
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u32 s_feature_ro_compat;
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/* Protects s_next_generation, osb_flags and s_inode_steal_slot.
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* Could protect more on osb as it's very short lived.
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*/
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spinlock_t osb_lock;
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u32 s_next_generation;
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unsigned long osb_flags;
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s16 s_inode_steal_slot;
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s16 s_meta_steal_slot;
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atomic_t s_num_inodes_stolen;
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atomic_t s_num_meta_stolen;
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unsigned long s_mount_opt;
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unsigned int s_atime_quantum;
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unsigned int max_slots;
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unsigned int node_num;
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int slot_num;
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int preferred_slot;
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int s_sectsize_bits;
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int s_clustersize;
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int s_clustersize_bits;
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unsigned int s_xattr_inline_size;
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atomic_t vol_state;
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struct mutex recovery_lock;
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struct ocfs2_recovery_map *recovery_map;
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struct ocfs2_replay_map *replay_map;
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struct task_struct *recovery_thread_task;
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int disable_recovery;
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wait_queue_head_t checkpoint_event;
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struct ocfs2_journal *journal;
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unsigned long osb_commit_interval;
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struct delayed_work la_enable_wq;
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/*
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* Must hold local alloc i_mutex and osb->osb_lock to change
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* local_alloc_bits. Reads can be done under either lock.
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*/
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unsigned int local_alloc_bits;
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unsigned int local_alloc_default_bits;
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/* osb_clusters_at_boot can become stale! Do not trust it to
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* be up to date. */
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unsigned int osb_clusters_at_boot;
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enum ocfs2_local_alloc_state local_alloc_state; /* protected
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* by osb_lock */
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struct buffer_head *local_alloc_bh;
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u64 la_last_gd;
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struct ocfs2_reservation_map osb_la_resmap;
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unsigned int osb_resv_level;
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unsigned int osb_dir_resv_level;
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/* Next two fields are for local node slot recovery during
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* mount. */
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struct ocfs2_dinode *local_alloc_copy;
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struct ocfs2_quota_recovery *quota_rec;
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struct ocfs2_blockcheck_stats osb_ecc_stats;
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struct ocfs2_alloc_stats alloc_stats;
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char dev_str[20]; /* "major,minor" of the device */
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u8 osb_stackflags;
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char osb_cluster_stack[OCFS2_STACK_LABEL_LEN + 1];
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char osb_cluster_name[OCFS2_CLUSTER_NAME_LEN + 1];
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struct ocfs2_cluster_connection *cconn;
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struct ocfs2_lock_res osb_super_lockres;
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struct ocfs2_lock_res osb_rename_lockres;
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struct ocfs2_lock_res osb_nfs_sync_lockres;
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struct ocfs2_dlm_debug *osb_dlm_debug;
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struct dentry *osb_debug_root;
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struct dentry *osb_ctxt;
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wait_queue_head_t recovery_event;
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spinlock_t dc_task_lock;
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struct task_struct *dc_task;
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wait_queue_head_t dc_event;
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unsigned long dc_wake_sequence;
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unsigned long dc_work_sequence;
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/*
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* Any thread can add locks to the list, but the downconvert
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* thread is the only one allowed to remove locks. Any change
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* to this rule requires updating
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* ocfs2_downconvert_thread_do_work().
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*/
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struct list_head blocked_lock_list;
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unsigned long blocked_lock_count;
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/* List of dquot structures to drop last reference to */
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struct llist_head dquot_drop_list;
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struct work_struct dquot_drop_work;
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wait_queue_head_t osb_mount_event;
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/* Truncate log info */
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struct inode *osb_tl_inode;
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struct buffer_head *osb_tl_bh;
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struct delayed_work osb_truncate_log_wq;
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atomic_t osb_tl_disable;
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/*
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* How many clusters in our truncate log.
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* It must be protected by osb_tl_inode->i_mutex.
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*/
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unsigned int truncated_clusters;
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struct ocfs2_node_map osb_recovering_orphan_dirs;
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unsigned int *osb_orphan_wipes;
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wait_queue_head_t osb_wipe_event;
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struct ocfs2_orphan_scan osb_orphan_scan;
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/* used to protect metaecc calculation check of xattr. */
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spinlock_t osb_xattr_lock;
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unsigned int osb_dx_mask;
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u32 osb_dx_seed[4];
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/* the group we used to allocate inodes. */
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u64 osb_inode_alloc_group;
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/* rb tree root for refcount lock. */
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struct rb_root osb_rf_lock_tree;
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struct ocfs2_refcount_tree *osb_ref_tree_lru;
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struct mutex system_file_mutex;
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/*
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* OCFS2 needs to schedule several different types of work which
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* require cluster locking, disk I/O, recovery waits, etc. Since these
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* types of work tend to be heavy we avoid using the kernel events
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* workqueue and schedule on our own.
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*/
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struct workqueue_struct *ocfs2_wq;
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};
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|
|
#define OCFS2_SB(sb) ((struct ocfs2_super *)(sb)->s_fs_info)
|
|
|
|
/* Useful typedef for passing around journal access functions */
|
|
typedef int (*ocfs2_journal_access_func)(handle_t *handle,
|
|
struct ocfs2_caching_info *ci,
|
|
struct buffer_head *bh, int type);
|
|
|
|
static inline int ocfs2_should_order_data(struct inode *inode)
|
|
{
|
|
if (!S_ISREG(inode->i_mode))
|
|
return 0;
|
|
if (OCFS2_SB(inode->i_sb)->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)
|
|
return 0;
|
|
return 1;
|
|
}
|
|
|
|
static inline int ocfs2_sparse_alloc(struct ocfs2_super *osb)
|
|
{
|
|
if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC)
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
static inline int ocfs2_writes_unwritten_extents(struct ocfs2_super *osb)
|
|
{
|
|
/*
|
|
* Support for sparse files is a pre-requisite
|
|
*/
|
|
if (!ocfs2_sparse_alloc(osb))
|
|
return 0;
|
|
|
|
if (osb->s_feature_ro_compat & OCFS2_FEATURE_RO_COMPAT_UNWRITTEN)
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
static inline int ocfs2_supports_append_dio(struct ocfs2_super *osb)
|
|
{
|
|
if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_APPEND_DIO)
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
|
|
static inline int ocfs2_supports_inline_data(struct ocfs2_super *osb)
|
|
{
|
|
if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INLINE_DATA)
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
static inline int ocfs2_supports_xattr(struct ocfs2_super *osb)
|
|
{
|
|
if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_XATTR)
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
static inline int ocfs2_meta_ecc(struct ocfs2_super *osb)
|
|
{
|
|
if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_META_ECC)
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
static inline int ocfs2_supports_indexed_dirs(struct ocfs2_super *osb)
|
|
{
|
|
if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INDEXED_DIRS)
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
static inline int ocfs2_supports_discontig_bg(struct ocfs2_super *osb)
|
|
{
|
|
if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_DISCONTIG_BG)
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
static inline unsigned int ocfs2_link_max(struct ocfs2_super *osb)
|
|
{
|
|
if (ocfs2_supports_indexed_dirs(osb))
|
|
return OCFS2_DX_LINK_MAX;
|
|
return OCFS2_LINK_MAX;
|
|
}
|
|
|
|
static inline unsigned int ocfs2_read_links_count(struct ocfs2_dinode *di)
|
|
{
|
|
u32 nlink = le16_to_cpu(di->i_links_count);
|
|
u32 hi = le16_to_cpu(di->i_links_count_hi);
|
|
|
|
if (di->i_dyn_features & cpu_to_le16(OCFS2_INDEXED_DIR_FL))
|
|
nlink |= (hi << OCFS2_LINKS_HI_SHIFT);
|
|
|
|
return nlink;
|
|
}
|
|
|
|
static inline void ocfs2_set_links_count(struct ocfs2_dinode *di, u32 nlink)
|
|
{
|
|
u16 lo, hi;
|
|
|
|
lo = nlink;
|
|
hi = nlink >> OCFS2_LINKS_HI_SHIFT;
|
|
|
|
di->i_links_count = cpu_to_le16(lo);
|
|
di->i_links_count_hi = cpu_to_le16(hi);
|
|
}
|
|
|
|
static inline void ocfs2_add_links_count(struct ocfs2_dinode *di, int n)
|
|
{
|
|
u32 links = ocfs2_read_links_count(di);
|
|
|
|
links += n;
|
|
|
|
ocfs2_set_links_count(di, links);
|
|
}
|
|
|
|
static inline int ocfs2_refcount_tree(struct ocfs2_super *osb)
|
|
{
|
|
if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_REFCOUNT_TREE)
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
/* set / clear functions because cluster events can make these happen
|
|
* in parallel so we want the transitions to be atomic. this also
|
|
* means that any future flags osb_flags must be protected by spinlock
|
|
* too! */
|
|
static inline void ocfs2_set_osb_flag(struct ocfs2_super *osb,
|
|
unsigned long flag)
|
|
{
|
|
spin_lock(&osb->osb_lock);
|
|
osb->osb_flags |= flag;
|
|
spin_unlock(&osb->osb_lock);
|
|
}
|
|
|
|
static inline void ocfs2_set_ro_flag(struct ocfs2_super *osb,
|
|
int hard)
|
|
{
|
|
spin_lock(&osb->osb_lock);
|
|
osb->osb_flags &= ~(OCFS2_OSB_SOFT_RO|OCFS2_OSB_HARD_RO);
|
|
if (hard)
|
|
osb->osb_flags |= OCFS2_OSB_HARD_RO;
|
|
else
|
|
osb->osb_flags |= OCFS2_OSB_SOFT_RO;
|
|
spin_unlock(&osb->osb_lock);
|
|
}
|
|
|
|
static inline int ocfs2_is_hard_readonly(struct ocfs2_super *osb)
|
|
{
|
|
int ret;
|
|
|
|
spin_lock(&osb->osb_lock);
|
|
ret = osb->osb_flags & OCFS2_OSB_HARD_RO;
|
|
spin_unlock(&osb->osb_lock);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static inline int ocfs2_is_soft_readonly(struct ocfs2_super *osb)
|
|
{
|
|
int ret;
|
|
|
|
spin_lock(&osb->osb_lock);
|
|
ret = osb->osb_flags & OCFS2_OSB_SOFT_RO;
|
|
spin_unlock(&osb->osb_lock);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static inline int ocfs2_clusterinfo_valid(struct ocfs2_super *osb)
|
|
{
|
|
return (osb->s_feature_incompat &
|
|
(OCFS2_FEATURE_INCOMPAT_USERSPACE_STACK |
|
|
OCFS2_FEATURE_INCOMPAT_CLUSTERINFO));
|
|
}
|
|
|
|
static inline int ocfs2_userspace_stack(struct ocfs2_super *osb)
|
|
{
|
|
if (ocfs2_clusterinfo_valid(osb) &&
|
|
memcmp(osb->osb_cluster_stack, OCFS2_CLASSIC_CLUSTER_STACK,
|
|
OCFS2_STACK_LABEL_LEN))
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
static inline int ocfs2_o2cb_stack(struct ocfs2_super *osb)
|
|
{
|
|
if (ocfs2_clusterinfo_valid(osb) &&
|
|
!memcmp(osb->osb_cluster_stack, OCFS2_CLASSIC_CLUSTER_STACK,
|
|
OCFS2_STACK_LABEL_LEN))
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
static inline int ocfs2_cluster_o2cb_global_heartbeat(struct ocfs2_super *osb)
|
|
{
|
|
return ocfs2_o2cb_stack(osb) &&
|
|
(osb->osb_stackflags & OCFS2_CLUSTER_O2CB_GLOBAL_HEARTBEAT);
|
|
}
|
|
|
|
static inline int ocfs2_mount_local(struct ocfs2_super *osb)
|
|
{
|
|
return (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT);
|
|
}
|
|
|
|
static inline int ocfs2_uses_extended_slot_map(struct ocfs2_super *osb)
|
|
{
|
|
return (osb->s_feature_incompat &
|
|
OCFS2_FEATURE_INCOMPAT_EXTENDED_SLOT_MAP);
|
|
}
|
|
|
|
|
|
#define OCFS2_IS_VALID_DINODE(ptr) \
|
|
(!strcmp((ptr)->i_signature, OCFS2_INODE_SIGNATURE))
|
|
|
|
#define OCFS2_IS_VALID_EXTENT_BLOCK(ptr) \
|
|
(!strcmp((ptr)->h_signature, OCFS2_EXTENT_BLOCK_SIGNATURE))
|
|
|
|
#define OCFS2_IS_VALID_GROUP_DESC(ptr) \
|
|
(!strcmp((ptr)->bg_signature, OCFS2_GROUP_DESC_SIGNATURE))
|
|
|
|
|
|
#define OCFS2_IS_VALID_XATTR_BLOCK(ptr) \
|
|
(!strcmp((ptr)->xb_signature, OCFS2_XATTR_BLOCK_SIGNATURE))
|
|
|
|
#define OCFS2_IS_VALID_DIR_TRAILER(ptr) \
|
|
(!strcmp((ptr)->db_signature, OCFS2_DIR_TRAILER_SIGNATURE))
|
|
|
|
#define OCFS2_IS_VALID_DX_ROOT(ptr) \
|
|
(!strcmp((ptr)->dr_signature, OCFS2_DX_ROOT_SIGNATURE))
|
|
|
|
#define OCFS2_IS_VALID_DX_LEAF(ptr) \
|
|
(!strcmp((ptr)->dl_signature, OCFS2_DX_LEAF_SIGNATURE))
|
|
|
|
#define OCFS2_IS_VALID_REFCOUNT_BLOCK(ptr) \
|
|
(!strcmp((ptr)->rf_signature, OCFS2_REFCOUNT_BLOCK_SIGNATURE))
|
|
|
|
static inline unsigned long ino_from_blkno(struct super_block *sb,
|
|
u64 blkno)
|
|
{
|
|
return (unsigned long)(blkno & (u64)ULONG_MAX);
|
|
}
|
|
|
|
static inline u64 ocfs2_clusters_to_blocks(struct super_block *sb,
|
|
u32 clusters)
|
|
{
|
|
int c_to_b_bits = OCFS2_SB(sb)->s_clustersize_bits -
|
|
sb->s_blocksize_bits;
|
|
|
|
return (u64)clusters << c_to_b_bits;
|
|
}
|
|
|
|
static inline u32 ocfs2_clusters_for_blocks(struct super_block *sb,
|
|
u64 blocks)
|
|
{
|
|
int b_to_c_bits = OCFS2_SB(sb)->s_clustersize_bits -
|
|
sb->s_blocksize_bits;
|
|
|
|
blocks += (1 << b_to_c_bits) - 1;
|
|
return (u32)(blocks >> b_to_c_bits);
|
|
}
|
|
|
|
static inline u32 ocfs2_blocks_to_clusters(struct super_block *sb,
|
|
u64 blocks)
|
|
{
|
|
int b_to_c_bits = OCFS2_SB(sb)->s_clustersize_bits -
|
|
sb->s_blocksize_bits;
|
|
|
|
return (u32)(blocks >> b_to_c_bits);
|
|
}
|
|
|
|
static inline unsigned int ocfs2_clusters_for_bytes(struct super_block *sb,
|
|
u64 bytes)
|
|
{
|
|
int cl_bits = OCFS2_SB(sb)->s_clustersize_bits;
|
|
unsigned int clusters;
|
|
|
|
bytes += OCFS2_SB(sb)->s_clustersize - 1;
|
|
/* OCFS2 just cannot have enough clusters to overflow this */
|
|
clusters = (unsigned int)(bytes >> cl_bits);
|
|
|
|
return clusters;
|
|
}
|
|
|
|
static inline unsigned int ocfs2_bytes_to_clusters(struct super_block *sb,
|
|
u64 bytes)
|
|
{
|
|
int cl_bits = OCFS2_SB(sb)->s_clustersize_bits;
|
|
unsigned int clusters;
|
|
|
|
clusters = (unsigned int)(bytes >> cl_bits);
|
|
return clusters;
|
|
}
|
|
|
|
static inline u64 ocfs2_blocks_for_bytes(struct super_block *sb,
|
|
u64 bytes)
|
|
{
|
|
bytes += sb->s_blocksize - 1;
|
|
return bytes >> sb->s_blocksize_bits;
|
|
}
|
|
|
|
static inline u64 ocfs2_clusters_to_bytes(struct super_block *sb,
|
|
u32 clusters)
|
|
{
|
|
return (u64)clusters << OCFS2_SB(sb)->s_clustersize_bits;
|
|
}
|
|
|
|
static inline u64 ocfs2_block_to_cluster_start(struct super_block *sb,
|
|
u64 blocks)
|
|
{
|
|
int bits = OCFS2_SB(sb)->s_clustersize_bits - sb->s_blocksize_bits;
|
|
unsigned int clusters;
|
|
|
|
clusters = ocfs2_blocks_to_clusters(sb, blocks);
|
|
return (u64)clusters << bits;
|
|
}
|
|
|
|
static inline u64 ocfs2_align_bytes_to_clusters(struct super_block *sb,
|
|
u64 bytes)
|
|
{
|
|
int cl_bits = OCFS2_SB(sb)->s_clustersize_bits;
|
|
unsigned int clusters;
|
|
|
|
clusters = ocfs2_clusters_for_bytes(sb, bytes);
|
|
return (u64)clusters << cl_bits;
|
|
}
|
|
|
|
static inline u64 ocfs2_align_bytes_to_blocks(struct super_block *sb,
|
|
u64 bytes)
|
|
{
|
|
u64 blocks;
|
|
|
|
blocks = ocfs2_blocks_for_bytes(sb, bytes);
|
|
return blocks << sb->s_blocksize_bits;
|
|
}
|
|
|
|
static inline unsigned long ocfs2_align_bytes_to_sectors(u64 bytes)
|
|
{
|
|
return (unsigned long)((bytes + 511) >> 9);
|
|
}
|
|
|
|
static inline unsigned int ocfs2_page_index_to_clusters(struct super_block *sb,
|
|
unsigned long pg_index)
|
|
{
|
|
u32 clusters = pg_index;
|
|
unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits;
|
|
|
|
if (unlikely(PAGE_SHIFT > cbits))
|
|
clusters = pg_index << (PAGE_SHIFT - cbits);
|
|
else if (PAGE_SHIFT < cbits)
|
|
clusters = pg_index >> (cbits - PAGE_SHIFT);
|
|
|
|
return clusters;
|
|
}
|
|
|
|
/*
|
|
* Find the 1st page index which covers the given clusters.
|
|
*/
|
|
static inline pgoff_t ocfs2_align_clusters_to_page_index(struct super_block *sb,
|
|
u32 clusters)
|
|
{
|
|
unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits;
|
|
pgoff_t index = clusters;
|
|
|
|
if (PAGE_SHIFT > cbits) {
|
|
index = (pgoff_t)clusters >> (PAGE_SHIFT - cbits);
|
|
} else if (PAGE_SHIFT < cbits) {
|
|
index = (pgoff_t)clusters << (cbits - PAGE_SHIFT);
|
|
}
|
|
|
|
return index;
|
|
}
|
|
|
|
static inline unsigned int ocfs2_pages_per_cluster(struct super_block *sb)
|
|
{
|
|
unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits;
|
|
unsigned int pages_per_cluster = 1;
|
|
|
|
if (PAGE_SHIFT < cbits)
|
|
pages_per_cluster = 1 << (cbits - PAGE_SHIFT);
|
|
|
|
return pages_per_cluster;
|
|
}
|
|
|
|
static inline unsigned int ocfs2_megabytes_to_clusters(struct super_block *sb,
|
|
unsigned int megs)
|
|
{
|
|
BUILD_BUG_ON(OCFS2_MAX_CLUSTERSIZE > 1048576);
|
|
|
|
return megs << (20 - OCFS2_SB(sb)->s_clustersize_bits);
|
|
}
|
|
|
|
static inline unsigned int ocfs2_clusters_to_megabytes(struct super_block *sb,
|
|
unsigned int clusters)
|
|
{
|
|
return clusters >> (20 - OCFS2_SB(sb)->s_clustersize_bits);
|
|
}
|
|
|
|
static inline void _ocfs2_set_bit(unsigned int bit, unsigned long *bitmap)
|
|
{
|
|
__set_bit_le(bit, bitmap);
|
|
}
|
|
#define ocfs2_set_bit(bit, addr) _ocfs2_set_bit((bit), (unsigned long *)(addr))
|
|
|
|
static inline void _ocfs2_clear_bit(unsigned int bit, unsigned long *bitmap)
|
|
{
|
|
__clear_bit_le(bit, bitmap);
|
|
}
|
|
#define ocfs2_clear_bit(bit, addr) _ocfs2_clear_bit((bit), (unsigned long *)(addr))
|
|
|
|
#define ocfs2_test_bit test_bit_le
|
|
#define ocfs2_find_next_zero_bit find_next_zero_bit_le
|
|
#define ocfs2_find_next_bit find_next_bit_le
|
|
|
|
static inline void *correct_addr_and_bit_unaligned(int *bit, void *addr)
|
|
{
|
|
#if BITS_PER_LONG == 64
|
|
*bit += ((unsigned long) addr & 7UL) << 3;
|
|
addr = (void *) ((unsigned long) addr & ~7UL);
|
|
#elif BITS_PER_LONG == 32
|
|
*bit += ((unsigned long) addr & 3UL) << 3;
|
|
addr = (void *) ((unsigned long) addr & ~3UL);
|
|
#else
|
|
#error "how many bits you are?!"
|
|
#endif
|
|
return addr;
|
|
}
|
|
|
|
static inline void ocfs2_set_bit_unaligned(int bit, void *bitmap)
|
|
{
|
|
bitmap = correct_addr_and_bit_unaligned(&bit, bitmap);
|
|
ocfs2_set_bit(bit, bitmap);
|
|
}
|
|
|
|
static inline void ocfs2_clear_bit_unaligned(int bit, void *bitmap)
|
|
{
|
|
bitmap = correct_addr_and_bit_unaligned(&bit, bitmap);
|
|
ocfs2_clear_bit(bit, bitmap);
|
|
}
|
|
|
|
static inline int ocfs2_test_bit_unaligned(int bit, void *bitmap)
|
|
{
|
|
bitmap = correct_addr_and_bit_unaligned(&bit, bitmap);
|
|
return ocfs2_test_bit(bit, bitmap);
|
|
}
|
|
|
|
static inline int ocfs2_find_next_zero_bit_unaligned(void *bitmap, int max,
|
|
int start)
|
|
{
|
|
int fix = 0, ret, tmpmax;
|
|
bitmap = correct_addr_and_bit_unaligned(&fix, bitmap);
|
|
tmpmax = max + fix;
|
|
start += fix;
|
|
|
|
ret = ocfs2_find_next_zero_bit(bitmap, tmpmax, start) - fix;
|
|
if (ret > max)
|
|
return max;
|
|
return ret;
|
|
}
|
|
|
|
#endif /* OCFS2_H */
|
|
|