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938 lines
25 KiB
938 lines
25 KiB
/* SPDX-License-Identifier: GPL-2.0-or-later */ |
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/* -*- 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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|
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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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#include "filecheck.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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u64 ls_last; /* Last unlock time 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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u64 l_lock_wait; /* First lock wait time */ |
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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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u32 d_filter_secs; |
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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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OCFS2_MOUNT_NOCLUSTER = 1 << 18, /* No cluster aware filesystem mount */ |
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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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u16 s_inode_steal_slot; |
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u16 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 rw_semaphore nfs_sync_rwlock; |
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struct ocfs2_lock_res osb_trim_fs_lockres; |
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struct mutex obs_trim_fs_mutex; |
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struct ocfs2_dlm_debug *osb_dlm_debug; |
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struct dentry *osb_debug_root; |
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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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|
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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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|
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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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/* |
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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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/* sysfs directory per partition */ |
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struct kset *osb_dev_kset; |
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|
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/* file check related stuff */ |
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struct ocfs2_filecheck_sysfs_entry osb_fc_ent; |
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}; |
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#define OCFS2_SB(sb) ((struct ocfs2_super *)(sb)->s_fs_info) |
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|
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/* Useful typedef for passing around journal access functions */ |
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typedef int (*ocfs2_journal_access_func)(handle_t *handle, |
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struct ocfs2_caching_info *ci, |
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struct buffer_head *bh, int type); |
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static inline int ocfs2_should_order_data(struct inode *inode) |
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{ |
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if (!S_ISREG(inode->i_mode)) |
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return 0; |
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if (OCFS2_SB(inode->i_sb)->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) |
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return 0; |
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return 1; |
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} |
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static inline int ocfs2_sparse_alloc(struct ocfs2_super *osb) |
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{ |
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if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC) |
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return 1; |
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return 0; |
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} |
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|
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static inline int ocfs2_writes_unwritten_extents(struct ocfs2_super *osb) |
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{ |
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/* |
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* Support for sparse files is a pre-requisite |
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*/ |
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if (!ocfs2_sparse_alloc(osb)) |
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return 0; |
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|
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if (osb->s_feature_ro_compat & OCFS2_FEATURE_RO_COMPAT_UNWRITTEN) |
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return 1; |
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return 0; |
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} |
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|
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static inline int ocfs2_supports_append_dio(struct ocfs2_super *osb) |
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{ |
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if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_APPEND_DIO) |
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return 1; |
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return 0; |
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} |
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|
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static inline int ocfs2_supports_inline_data(struct ocfs2_super *osb) |
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{ |
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if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INLINE_DATA) |
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return 1; |
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return 0; |
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} |
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|
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static inline int ocfs2_supports_xattr(struct ocfs2_super *osb) |
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{ |
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if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_XATTR) |
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return 1; |
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return 0; |
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} |
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|
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static inline int ocfs2_meta_ecc(struct ocfs2_super *osb) |
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{ |
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if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_META_ECC) |
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return 1; |
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return 0; |
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} |
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|
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static inline int ocfs2_supports_indexed_dirs(struct ocfs2_super *osb) |
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{ |
|
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) |
|
|| (osb->s_mount_opt & OCFS2_MOUNT_NOCLUSTER)); |
|
} |
|
|
|
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 */ |
|
|
|
|