194 строки
6.2 KiB
C
194 строки
6.2 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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* inode.h
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*
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* Function prototypes
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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_INODE_H
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#define OCFS2_INODE_H
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#include "extent_map.h"
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/* OCFS2 Inode Private Data */
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struct ocfs2_inode_info
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{
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u64 ip_blkno;
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struct ocfs2_lock_res ip_rw_lockres;
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struct ocfs2_lock_res ip_inode_lockres;
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struct ocfs2_lock_res ip_open_lockres;
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/* protects allocation changes on this inode. */
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struct rw_semaphore ip_alloc_sem;
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/* protects extended attribute changes on this inode */
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struct rw_semaphore ip_xattr_sem;
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/* These fields are protected by ip_lock */
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spinlock_t ip_lock;
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u32 ip_open_count;
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struct list_head ip_io_markers;
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u32 ip_clusters;
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u16 ip_dyn_features;
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struct mutex ip_io_mutex;
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u32 ip_flags; /* see below */
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u32 ip_attr; /* inode attributes */
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/* Record unwritten extents during direct io. */
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struct list_head ip_unwritten_list;
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/* protected by recovery_lock. */
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struct inode *ip_next_orphan;
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struct ocfs2_caching_info ip_metadata_cache;
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struct ocfs2_extent_map ip_extent_map;
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struct inode vfs_inode;
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struct jbd2_inode ip_jinode;
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u32 ip_dir_start_lookup;
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/* Only valid if the inode is the dir. */
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u32 ip_last_used_slot;
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u64 ip_last_used_group;
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u32 ip_dir_lock_gen;
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struct ocfs2_alloc_reservation ip_la_data_resv;
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/*
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* Transactions that contain inode's metadata needed to complete
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* fsync and fdatasync, respectively.
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*/
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tid_t i_sync_tid;
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tid_t i_datasync_tid;
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struct dquot *i_dquot[MAXQUOTAS];
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};
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/*
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* Flags for the ip_flags field
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*/
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/* System file inodes */
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#define OCFS2_INODE_SYSTEM_FILE 0x00000001
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#define OCFS2_INODE_JOURNAL 0x00000002
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#define OCFS2_INODE_BITMAP 0x00000004
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/* This inode has been wiped from disk */
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#define OCFS2_INODE_DELETED 0x00000008
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/* Has the inode been orphaned on another node?
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*
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* This hints to ocfs2_drop_inode that it should clear i_nlink before
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* continuing.
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*
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* We *only* set this on unlink vote from another node. If the inode
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* was locally orphaned, then we're sure of the state and don't need
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* to twiddle i_nlink later - it's either zero or not depending on
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* whether our unlink succeeded. Otherwise we got this from a node
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* whose intention was to orphan the inode, however he may have
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* crashed, failed etc, so we let ocfs2_drop_inode zero the value and
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* rely on ocfs2_delete_inode to sort things out under the proper
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* cluster locks.
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*/
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#define OCFS2_INODE_MAYBE_ORPHANED 0x00000010
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/* Does someone have the file open O_DIRECT */
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#define OCFS2_INODE_OPEN_DIRECT 0x00000020
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/* Tell the inode wipe code it's not in orphan dir */
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#define OCFS2_INODE_SKIP_ORPHAN_DIR 0x00000040
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/* Entry in orphan dir with 'dio-' prefix */
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#define OCFS2_INODE_DIO_ORPHAN_ENTRY 0x00000080
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static inline struct ocfs2_inode_info *OCFS2_I(struct inode *inode)
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{
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return container_of(inode, struct ocfs2_inode_info, vfs_inode);
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}
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#define INODE_JOURNAL(i) (OCFS2_I(i)->ip_flags & OCFS2_INODE_JOURNAL)
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#define SET_INODE_JOURNAL(i) (OCFS2_I(i)->ip_flags |= OCFS2_INODE_JOURNAL)
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extern struct kmem_cache *ocfs2_inode_cache;
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extern const struct address_space_operations ocfs2_aops;
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extern const struct ocfs2_caching_operations ocfs2_inode_caching_ops;
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static inline struct ocfs2_caching_info *INODE_CACHE(struct inode *inode)
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{
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return &OCFS2_I(inode)->ip_metadata_cache;
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}
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void ocfs2_evict_inode(struct inode *inode);
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int ocfs2_drop_inode(struct inode *inode);
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/* Flags for ocfs2_iget() */
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#define OCFS2_FI_FLAG_SYSFILE 0x1
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#define OCFS2_FI_FLAG_ORPHAN_RECOVERY 0x2
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#define OCFS2_FI_FLAG_FILECHECK_CHK 0x4
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#define OCFS2_FI_FLAG_FILECHECK_FIX 0x8
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struct inode *ocfs2_ilookup(struct super_block *sb, u64 feoff);
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struct inode *ocfs2_iget(struct ocfs2_super *osb, u64 feoff, unsigned flags,
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int sysfile_type);
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int ocfs2_inode_init_private(struct inode *inode);
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int ocfs2_inode_revalidate(struct dentry *dentry);
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void ocfs2_populate_inode(struct inode *inode, struct ocfs2_dinode *fe,
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int create_ino);
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void ocfs2_read_inode(struct inode *inode);
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void ocfs2_read_inode2(struct inode *inode, void *opaque);
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ssize_t ocfs2_rw_direct(int rw, struct file *filp, char *buf,
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size_t size, loff_t *offp);
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void ocfs2_sync_blockdev(struct super_block *sb);
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void ocfs2_refresh_inode(struct inode *inode,
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struct ocfs2_dinode *fe);
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int ocfs2_mark_inode_dirty(handle_t *handle,
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struct inode *inode,
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struct buffer_head *bh);
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struct buffer_head *ocfs2_bread(struct inode *inode,
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int block, int *err, int reada);
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void ocfs2_set_inode_flags(struct inode *inode);
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void ocfs2_get_inode_flags(struct ocfs2_inode_info *oi);
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static inline blkcnt_t ocfs2_inode_sector_count(struct inode *inode)
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{
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int c_to_s_bits = OCFS2_SB(inode->i_sb)->s_clustersize_bits - 9;
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return (blkcnt_t)OCFS2_I(inode)->ip_clusters << c_to_s_bits;
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}
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/* Validate that a bh contains a valid inode */
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int ocfs2_validate_inode_block(struct super_block *sb,
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struct buffer_head *bh);
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/*
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* Read an inode block into *bh. If *bh is NULL, a bh will be allocated.
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* This is a cached read. The inode will be validated with
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* ocfs2_validate_inode_block().
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*/
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int ocfs2_read_inode_block(struct inode *inode, struct buffer_head **bh);
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/* The same, but can be passed OCFS2_BH_* flags */
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int ocfs2_read_inode_block_full(struct inode *inode, struct buffer_head **bh,
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int flags);
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static inline struct ocfs2_inode_info *cache_info_to_inode(struct ocfs2_caching_info *ci)
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{
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return container_of(ci, struct ocfs2_inode_info, ip_metadata_cache);
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}
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#endif /* OCFS2_INODE_H */
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