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 struct list_head ip_io_markers; 50 u32 ip_clusters; 51 52 u16 ip_dyn_features; 53 struct mutex ip_io_mutex; 54 u32 ip_flags; /* see below */ 55 u32 ip_attr; /* inode attributes */ 56 57 /* Record unwritten extents during direct io. */ 58 struct list_head ip_unwritten_list; 59 60 /* protected by recovery_lock. */ 61 struct inode *ip_next_orphan; 62 63 struct ocfs2_caching_info ip_metadata_cache; 64 struct ocfs2_extent_map ip_extent_map; 65 struct inode vfs_inode; 66 struct jbd2_inode ip_jinode; 67 68 u32 ip_dir_start_lookup; 69 70 /* Only valid if the inode is the dir. */ 71 u32 ip_last_used_slot; 72 u64 ip_last_used_group; 73 u32 ip_dir_lock_gen; 74 75 struct ocfs2_alloc_reservation ip_la_data_resv; 76 77 /* 78 * Transactions that contain inode's metadata needed to complete 79 * fsync and fdatasync, respectively. 80 */ 81 tid_t i_sync_tid; 82 tid_t i_datasync_tid; 83 84 struct dquot *i_dquot[MAXQUOTAS]; 85 }; 86 87 /* 88 * Flags for the ip_flags field 89 */ 90 /* System file inodes */ 91 #define OCFS2_INODE_SYSTEM_FILE 0x00000001 92 #define OCFS2_INODE_JOURNAL 0x00000002 93 #define OCFS2_INODE_BITMAP 0x00000004 94 /* This inode has been wiped from disk */ 95 #define OCFS2_INODE_DELETED 0x00000008 96 /* Has the inode been orphaned on another node? 97 * 98 * This hints to ocfs2_drop_inode that it should clear i_nlink before 99 * continuing. 100 * 101 * We *only* set this on unlink vote from another node. If the inode 102 * was locally orphaned, then we're sure of the state and don't need 103 * to twiddle i_nlink later - it's either zero or not depending on 104 * whether our unlink succeeded. Otherwise we got this from a node 105 * whose intention was to orphan the inode, however he may have 106 * crashed, failed etc, so we let ocfs2_drop_inode zero the value and 107 * rely on ocfs2_delete_inode to sort things out under the proper 108 * cluster locks. 109 */ 110 #define OCFS2_INODE_MAYBE_ORPHANED 0x00000010 111 /* Does someone have the file open O_DIRECT */ 112 #define OCFS2_INODE_OPEN_DIRECT 0x00000020 113 /* Tell the inode wipe code it's not in orphan dir */ 114 #define OCFS2_INODE_SKIP_ORPHAN_DIR 0x00000040 115 /* Entry in orphan dir with 'dio-' prefix */ 116 #define OCFS2_INODE_DIO_ORPHAN_ENTRY 0x00000080 117 118 static inline struct ocfs2_inode_info *OCFS2_I(struct inode *inode) 119 { 120 return container_of(inode, struct ocfs2_inode_info, vfs_inode); 121 } 122 123 #define INODE_JOURNAL(i) (OCFS2_I(i)->ip_flags & OCFS2_INODE_JOURNAL) 124 #define SET_INODE_JOURNAL(i) (OCFS2_I(i)->ip_flags |= OCFS2_INODE_JOURNAL) 125 126 extern struct kmem_cache *ocfs2_inode_cache; 127 128 extern const struct address_space_operations ocfs2_aops; 129 extern const struct ocfs2_caching_operations ocfs2_inode_caching_ops; 130 131 static inline struct ocfs2_caching_info *INODE_CACHE(struct inode *inode) 132 { 133 return &OCFS2_I(inode)->ip_metadata_cache; 134 } 135 136 void ocfs2_evict_inode(struct inode *inode); 137 int ocfs2_drop_inode(struct inode *inode); 138 139 /* Flags for ocfs2_iget() */ 140 #define OCFS2_FI_FLAG_SYSFILE 0x1 141 #define OCFS2_FI_FLAG_ORPHAN_RECOVERY 0x2 142 #define OCFS2_FI_FLAG_FILECHECK_CHK 0x4 143 #define OCFS2_FI_FLAG_FILECHECK_FIX 0x8 144 145 struct inode *ocfs2_ilookup(struct super_block *sb, u64 feoff); 146 struct inode *ocfs2_iget(struct ocfs2_super *osb, u64 feoff, unsigned flags, 147 int sysfile_type); 148 int ocfs2_inode_init_private(struct inode *inode); 149 int ocfs2_inode_revalidate(struct dentry *dentry); 150 void ocfs2_populate_inode(struct inode *inode, struct ocfs2_dinode *fe, 151 int create_ino); 152 void ocfs2_read_inode(struct inode *inode); 153 void ocfs2_read_inode2(struct inode *inode, void *opaque); 154 ssize_t ocfs2_rw_direct(int rw, struct file *filp, char *buf, 155 size_t size, loff_t *offp); 156 void ocfs2_sync_blockdev(struct super_block *sb); 157 void ocfs2_refresh_inode(struct inode *inode, 158 struct ocfs2_dinode *fe); 159 int ocfs2_mark_inode_dirty(handle_t *handle, 160 struct inode *inode, 161 struct buffer_head *bh); 162 struct buffer_head *ocfs2_bread(struct inode *inode, 163 int block, int *err, int reada); 164 165 void ocfs2_set_inode_flags(struct inode *inode); 166 void ocfs2_get_inode_flags(struct ocfs2_inode_info *oi); 167 168 static inline blkcnt_t ocfs2_inode_sector_count(struct inode *inode) 169 { 170 int c_to_s_bits = OCFS2_SB(inode->i_sb)->s_clustersize_bits - 9; 171 172 return (blkcnt_t)OCFS2_I(inode)->ip_clusters << c_to_s_bits; 173 } 174 175 /* Validate that a bh contains a valid inode */ 176 int ocfs2_validate_inode_block(struct super_block *sb, 177 struct buffer_head *bh); 178 /* 179 * Read an inode block into *bh. If *bh is NULL, a bh will be allocated. 180 * This is a cached read. The inode will be validated with 181 * ocfs2_validate_inode_block(). 182 */ 183 int ocfs2_read_inode_block(struct inode *inode, struct buffer_head **bh); 184 /* The same, but can be passed OCFS2_BH_* flags */ 185 int ocfs2_read_inode_block_full(struct inode *inode, struct buffer_head **bh, 186 int flags); 187 188 static inline struct ocfs2_inode_info *cache_info_to_inode(struct ocfs2_caching_info *ci) 189 { 190 return container_of(ci, struct ocfs2_inode_info, ip_metadata_cache); 191 } 192 193 #endif /* OCFS2_INODE_H */ 194