1 /* -*- mode: c; c-basic-offset: 8; -*- 2 * vim: noexpandtab sw=8 ts=8 sts=0: 3 * 4 * inode.h 5 * 6 * Function prototypes 7 * 8 * Copyright (C) 2002, 2004 Oracle. All rights reserved. 9 * 10 * This program is free software; you can redistribute it and/or 11 * modify it under the terms of the GNU General Public 12 * License as published by the Free Software Foundation; either 13 * version 2 of the License, or (at your option) any later version. 14 * 15 * This program is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 18 * General Public License for more details. 19 * 20 * You should have received a copy of the GNU General Public 21 * License along with this program; if not, write to the 22 * Free Software Foundation, Inc., 59 Temple Place - Suite 330, 23 * Boston, MA 021110-1307, USA. 24 */ 25 26 #ifndef OCFS2_INODE_H 27 #define OCFS2_INODE_H 28 29 /* OCFS2 Inode Private Data */ 30 struct ocfs2_inode_info 31 { 32 u64 ip_blkno; 33 34 struct ocfs2_lock_res ip_rw_lockres; 35 struct ocfs2_lock_res ip_meta_lockres; 36 struct ocfs2_lock_res ip_data_lockres; 37 38 /* protects allocation changes on this inode. */ 39 struct rw_semaphore ip_alloc_sem; 40 41 /* These fields are protected by ip_lock */ 42 spinlock_t ip_lock; 43 u32 ip_open_count; 44 u32 ip_clusters; 45 struct ocfs2_extent_map ip_map; 46 struct list_head ip_io_markers; 47 int ip_orphaned_slot; 48 49 struct mutex ip_io_mutex; 50 51 u32 ip_flags; /* see below */ 52 u32 ip_attr; /* inode attributes */ 53 54 /* protected by recovery_lock. */ 55 struct inode *ip_next_orphan; 56 57 u32 ip_dir_start_lookup; 58 59 /* next two are protected by trans_inc_lock */ 60 /* which transaction were we created on? Zero if none. */ 61 unsigned long ip_created_trans; 62 /* last transaction we were a part of. */ 63 unsigned long ip_last_trans; 64 65 struct ocfs2_caching_info ip_metadata_cache; 66 67 struct inode vfs_inode; 68 }; 69 70 /* 71 * Flags for the ip_flags field 72 */ 73 /* System file inodes */ 74 #define OCFS2_INODE_SYSTEM_FILE 0x00000001 75 #define OCFS2_INODE_JOURNAL 0x00000002 76 #define OCFS2_INODE_BITMAP 0x00000004 77 /* This inode has been wiped from disk */ 78 #define OCFS2_INODE_DELETED 0x00000008 79 /* Another node is deleting, so our delete is a nop */ 80 #define OCFS2_INODE_SKIP_DELETE 0x00000010 81 /* Has the inode been orphaned on another node? 82 * 83 * This hints to ocfs2_drop_inode that it should clear i_nlink before 84 * continuing. 85 * 86 * We *only* set this on unlink vote from another node. If the inode 87 * was locally orphaned, then we're sure of the state and don't need 88 * to twiddle i_nlink later - it's either zero or not depending on 89 * whether our unlink succeeded. Otherwise we got this from a node 90 * whose intention was to orphan the inode, however he may have 91 * crashed, failed etc, so we let ocfs2_drop_inode zero the value and 92 * rely on ocfs2_delete_inode to sort things out under the proper 93 * cluster locks. 94 */ 95 #define OCFS2_INODE_MAYBE_ORPHANED 0x00000020 96 /* Does someone have the file open O_DIRECT */ 97 #define OCFS2_INODE_OPEN_DIRECT 0x00000040 98 /* Indicates that the metadata cache should be used as an array. */ 99 #define OCFS2_INODE_CACHE_INLINE 0x00000080 100 101 static inline struct ocfs2_inode_info *OCFS2_I(struct inode *inode) 102 { 103 return container_of(inode, struct ocfs2_inode_info, vfs_inode); 104 } 105 106 #define INODE_JOURNAL(i) (OCFS2_I(i)->ip_flags & OCFS2_INODE_JOURNAL) 107 #define SET_INODE_JOURNAL(i) (OCFS2_I(i)->ip_flags |= OCFS2_INODE_JOURNAL) 108 109 extern struct kmem_cache *ocfs2_inode_cache; 110 111 extern const struct address_space_operations ocfs2_aops; 112 113 struct buffer_head *ocfs2_bread(struct inode *inode, int block, 114 int *err, int reada); 115 void ocfs2_clear_inode(struct inode *inode); 116 void ocfs2_delete_inode(struct inode *inode); 117 void ocfs2_drop_inode(struct inode *inode); 118 119 /* Flags for ocfs2_iget() */ 120 #define OCFS2_FI_FLAG_NOWAIT 0x1 121 #define OCFS2_FI_FLAG_DELETE 0x2 122 #define OCFS2_FI_FLAG_SYSFILE 0x4 123 #define OCFS2_FI_FLAG_NOLOCK 0x8 124 struct inode *ocfs2_iget(struct ocfs2_super *osb, u64 feoff, int flags); 125 struct inode *ocfs2_ilookup_for_vote(struct ocfs2_super *osb, 126 u64 blkno, 127 int delete_vote); 128 int ocfs2_inode_init_private(struct inode *inode); 129 int ocfs2_inode_revalidate(struct dentry *dentry); 130 int ocfs2_populate_inode(struct inode *inode, struct ocfs2_dinode *fe, 131 int create_ino); 132 void ocfs2_read_inode(struct inode *inode); 133 void ocfs2_read_inode2(struct inode *inode, void *opaque); 134 ssize_t ocfs2_rw_direct(int rw, struct file *filp, char *buf, 135 size_t size, loff_t *offp); 136 void ocfs2_sync_blockdev(struct super_block *sb); 137 void ocfs2_refresh_inode(struct inode *inode, 138 struct ocfs2_dinode *fe); 139 int ocfs2_mark_inode_dirty(handle_t *handle, 140 struct inode *inode, 141 struct buffer_head *bh); 142 int ocfs2_aio_read(struct file *file, struct kiocb *req, struct iocb *iocb); 143 int ocfs2_aio_write(struct file *file, struct kiocb *req, struct iocb *iocb); 144 145 void ocfs2_set_inode_flags(struct inode *inode); 146 147 #endif /* OCFS2_INODE_H */ 148