/* -*- 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 */