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 #include "extent_map.h" 30 31 /* OCFS2 Inode Private Data */ 32 struct ocfs2_inode_info 33 { 34 u64 ip_blkno; 35 36 struct ocfs2_lock_res ip_rw_lockres; 37 struct ocfs2_lock_res ip_inode_lockres; 38 struct ocfs2_lock_res ip_open_lockres; 39 40 /* protects allocation changes on this inode. */ 41 struct rw_semaphore ip_alloc_sem; 42 43 /* protects extended attribute changes on this inode */ 44 struct rw_semaphore ip_xattr_sem; 45 46 /* These fields are protected by ip_lock */ 47 spinlock_t ip_lock; 48 u32 ip_open_count; 49 u32 ip_clusters; 50 struct list_head ip_io_markers; 51 52 struct mutex ip_io_mutex; 53 54 u32 ip_flags; /* see below */ 55 u32 ip_attr; /* inode attributes */ 56 u16 ip_dyn_features; 57 58 /* protected by recovery_lock. */ 59 struct inode *ip_next_orphan; 60 61 u32 ip_dir_start_lookup; 62 63 /* next two are protected by trans_inc_lock */ 64 /* which transaction were we created on? Zero if none. */ 65 unsigned long ip_created_trans; 66 /* last transaction we were a part of. */ 67 unsigned long ip_last_trans; 68 69 struct ocfs2_caching_info ip_metadata_cache; 70 71 struct ocfs2_extent_map ip_extent_map; 72 73 struct inode vfs_inode; 74 struct jbd2_inode ip_jinode; 75 }; 76 77 /* 78 * Flags for the ip_flags field 79 */ 80 /* System file inodes */ 81 #define OCFS2_INODE_SYSTEM_FILE 0x00000001 82 #define OCFS2_INODE_JOURNAL 0x00000002 83 #define OCFS2_INODE_BITMAP 0x00000004 84 /* This inode has been wiped from disk */ 85 #define OCFS2_INODE_DELETED 0x00000008 86 /* Another node is deleting, so our delete is a nop */ 87 #define OCFS2_INODE_SKIP_DELETE 0x00000010 88 /* Has the inode been orphaned on another node? 89 * 90 * This hints to ocfs2_drop_inode that it should clear i_nlink before 91 * continuing. 92 * 93 * We *only* set this on unlink vote from another node. If the inode 94 * was locally orphaned, then we're sure of the state and don't need 95 * to twiddle i_nlink later - it's either zero or not depending on 96 * whether our unlink succeeded. Otherwise we got this from a node 97 * whose intention was to orphan the inode, however he may have 98 * crashed, failed etc, so we let ocfs2_drop_inode zero the value and 99 * rely on ocfs2_delete_inode to sort things out under the proper 100 * cluster locks. 101 */ 102 #define OCFS2_INODE_MAYBE_ORPHANED 0x00000020 103 /* Does someone have the file open O_DIRECT */ 104 #define OCFS2_INODE_OPEN_DIRECT 0x00000040 105 /* Indicates that the metadata cache should be used as an array. */ 106 #define OCFS2_INODE_CACHE_INLINE 0x00000080 107 108 static inline struct ocfs2_inode_info *OCFS2_I(struct inode *inode) 109 { 110 return container_of(inode, struct ocfs2_inode_info, vfs_inode); 111 } 112 113 #define INODE_JOURNAL(i) (OCFS2_I(i)->ip_flags & OCFS2_INODE_JOURNAL) 114 #define SET_INODE_JOURNAL(i) (OCFS2_I(i)->ip_flags |= OCFS2_INODE_JOURNAL) 115 116 extern struct kmem_cache *ocfs2_inode_cache; 117 118 extern const struct address_space_operations ocfs2_aops; 119 120 void ocfs2_clear_inode(struct inode *inode); 121 void ocfs2_delete_inode(struct inode *inode); 122 void ocfs2_drop_inode(struct inode *inode); 123 124 /* Flags for ocfs2_iget() */ 125 #define OCFS2_FI_FLAG_SYSFILE 0x1 126 #define OCFS2_FI_FLAG_ORPHAN_RECOVERY 0x2 127 struct inode *ocfs2_iget(struct ocfs2_super *osb, u64 feoff, unsigned flags, 128 int sysfile_type); 129 int ocfs2_inode_init_private(struct inode *inode); 130 int ocfs2_inode_revalidate(struct dentry *dentry); 131 int ocfs2_populate_inode(struct inode *inode, struct ocfs2_dinode *fe, 132 int create_ino); 133 void ocfs2_read_inode(struct inode *inode); 134 void ocfs2_read_inode2(struct inode *inode, void *opaque); 135 ssize_t ocfs2_rw_direct(int rw, struct file *filp, char *buf, 136 size_t size, loff_t *offp); 137 void ocfs2_sync_blockdev(struct super_block *sb); 138 void ocfs2_refresh_inode(struct inode *inode, 139 struct ocfs2_dinode *fe); 140 int ocfs2_mark_inode_dirty(handle_t *handle, 141 struct inode *inode, 142 struct buffer_head *bh); 143 int ocfs2_aio_read(struct file *file, struct kiocb *req, struct iocb *iocb); 144 int ocfs2_aio_write(struct file *file, struct kiocb *req, struct iocb *iocb); 145 146 void ocfs2_set_inode_flags(struct inode *inode); 147 void ocfs2_get_inode_flags(struct ocfs2_inode_info *oi); 148 149 static inline blkcnt_t ocfs2_inode_sector_count(struct inode *inode) 150 { 151 int c_to_s_bits = OCFS2_SB(inode->i_sb)->s_clustersize_bits - 9; 152 153 return (blkcnt_t)(OCFS2_I(inode)->ip_clusters << c_to_s_bits); 154 } 155 156 #endif /* OCFS2_INODE_H */ 157