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Diffstat (limited to 'fs/ocfs2/inode.h')
| -rw-r--r-- | fs/ocfs2/inode.h | 183 |
1 files changed, 183 insertions, 0 deletions
diff --git a/fs/ocfs2/inode.h b/fs/ocfs2/inode.h new file mode 100644 index 00000000..88924a31 --- /dev/null +++ b/fs/ocfs2/inode.h @@ -0,0 +1,183 @@ +/* -*- mode: c; c-basic-offset: 8; -*- + * vim: noexpandtab sw=8 ts=8 sts=0: + * + * inode.h + * + * Function prototypes + * + * Copyright (C) 2002, 2004 Oracle. All rights reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public + * License along with this program; if not, write to the + * Free Software Foundation, Inc., 59 Temple Place - Suite 330, + * Boston, MA 021110-1307, USA. + */ + +#ifndef OCFS2_INODE_H +#define OCFS2_INODE_H + +#include "extent_map.h" + +/* OCFS2 Inode Private Data */ +struct ocfs2_inode_info +{ + u64 ip_blkno; + + struct ocfs2_lock_res ip_rw_lockres; + struct ocfs2_lock_res ip_inode_lockres; + struct ocfs2_lock_res ip_open_lockres; + + /* protects allocation changes on this inode. */ + struct rw_semaphore ip_alloc_sem; + + /* protects extended attribute changes on this inode */ + struct rw_semaphore ip_xattr_sem; + + /* Number of outstanding AIO's which are not page aligned */ + atomic_t ip_unaligned_aio; + + /* These fields are protected by ip_lock */ + spinlock_t ip_lock; + u32 ip_open_count; + struct list_head ip_io_markers; + u32 ip_clusters; + + u16 ip_dyn_features; + struct mutex ip_io_mutex; + u32 ip_flags; /* see below */ + u32 ip_attr; /* inode attributes */ + + /* protected by recovery_lock. */ + struct inode *ip_next_orphan; + + struct ocfs2_caching_info ip_metadata_cache; + struct ocfs2_extent_map ip_extent_map; + struct inode vfs_inode; + struct jbd2_inode ip_jinode; + + u32 ip_dir_start_lookup; + + /* Only valid if the inode is the dir. */ + u32 ip_last_used_slot; + u64 ip_last_used_group; + u32 ip_dir_lock_gen; + + struct ocfs2_alloc_reservation ip_la_data_resv; +}; + +/* + * Flags for the ip_flags field + */ +/* System file inodes */ +#define OCFS2_INODE_SYSTEM_FILE 0x00000001 +#define OCFS2_INODE_JOURNAL 0x00000002 +#define OCFS2_INODE_BITMAP 0x00000004 +/* This inode has been wiped from disk */ +#define OCFS2_INODE_DELETED 0x00000008 +/* Another node is deleting, so our delete is a nop */ +#define OCFS2_INODE_SKIP_DELETE 0x00000010 +/* Has the inode been orphaned on another node? + * + * This hints to ocfs2_drop_inode that it should clear i_nlink before + * continuing. + * + * We *only* set this on unlink vote from another node. If the inode + * was locally orphaned, then we're sure of the state and don't need + * to twiddle i_nlink later - it's either zero or not depending on + * whether our unlink succeeded. Otherwise we got this from a node + * whose intention was to orphan the inode, however he may have + * crashed, failed etc, so we let ocfs2_drop_inode zero the value and + * rely on ocfs2_delete_inode to sort things out under the proper + * cluster locks. + */ +#define OCFS2_INODE_MAYBE_ORPHANED 0x00000020 +/* Does someone have the file open O_DIRECT */ +#define OCFS2_INODE_OPEN_DIRECT 0x00000040 +/* Tell the inode wipe code it's not in orphan dir */ +#define OCFS2_INODE_SKIP_ORPHAN_DIR 0x00000080 + +static inline struct ocfs2_inode_info *OCFS2_I(struct inode *inode) +{ + return container_of(inode, struct ocfs2_inode_info, vfs_inode); +} + +#define INODE_JOURNAL(i) (OCFS2_I(i)->ip_flags & OCFS2_INODE_JOURNAL) +#define SET_INODE_JOURNAL(i) (OCFS2_I(i)->ip_flags |= OCFS2_INODE_JOURNAL) + +extern struct kmem_cache *ocfs2_inode_cache; + +extern const struct address_space_operations ocfs2_aops; +extern const struct ocfs2_caching_operations ocfs2_inode_caching_ops; + +static inline struct ocfs2_caching_info *INODE_CACHE(struct inode *inode) +{ + return &OCFS2_I(inode)->ip_metadata_cache; +} + +void ocfs2_evict_inode(struct inode *inode); +int ocfs2_drop_inode(struct inode *inode); + +/* Flags for ocfs2_iget() */ +#define OCFS2_FI_FLAG_SYSFILE 0x1 +#define OCFS2_FI_FLAG_ORPHAN_RECOVERY 0x2 +struct inode *ocfs2_ilookup(struct super_block *sb, u64 feoff); +struct inode *ocfs2_iget(struct ocfs2_super *osb, u64 feoff, unsigned flags, + int sysfile_type); +int ocfs2_inode_init_private(struct inode *inode); +int ocfs2_inode_revalidate(struct dentry *dentry); +void ocfs2_populate_inode(struct inode *inode, struct ocfs2_dinode *fe, + int create_ino); +void ocfs2_read_inode(struct inode *inode); +void ocfs2_read_inode2(struct inode *inode, void *opaque); +ssize_t ocfs2_rw_direct(int rw, struct file *filp, char *buf, + size_t size, loff_t *offp); +void ocfs2_sync_blockdev(struct super_block *sb); +void ocfs2_refresh_inode(struct inode *inode, + struct ocfs2_dinode *fe); +int ocfs2_mark_inode_dirty(handle_t *handle, + struct inode *inode, + struct buffer_head *bh); +int ocfs2_aio_read(struct file *file, struct kiocb *req, struct iocb *iocb); +int ocfs2_aio_write(struct file *file, struct kiocb *req, struct iocb *iocb); +struct buffer_head *ocfs2_bread(struct inode *inode, + int block, int *err, int reada); + +void ocfs2_set_inode_flags(struct inode *inode); +void ocfs2_get_inode_flags(struct ocfs2_inode_info *oi); + +static inline blkcnt_t ocfs2_inode_sector_count(struct inode *inode) +{ + int c_to_s_bits = OCFS2_SB(inode->i_sb)->s_clustersize_bits - 9; + + return (blkcnt_t)(OCFS2_I(inode)->ip_clusters << c_to_s_bits); +} + +/* Validate that a bh contains a valid inode */ +int ocfs2_validate_inode_block(struct super_block *sb, + struct buffer_head *bh); +/* + * Read an inode block into *bh. If *bh is NULL, a bh will be allocated. + * This is a cached read. The inode will be validated with + * ocfs2_validate_inode_block(). + */ +int ocfs2_read_inode_block(struct inode *inode, struct buffer_head **bh); +/* The same, but can be passed OCFS2_BH_* flags */ +int ocfs2_read_inode_block_full(struct inode *inode, struct buffer_head **bh, + int flags); + +static inline struct ocfs2_inode_info *cache_info_to_inode(struct ocfs2_caching_info *ci) +{ + return container_of(ci, struct ocfs2_inode_info, ip_metadata_cache); +} + +#endif /* OCFS2_INODE_H */ |