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 /* protected by recovery_lock. */ 58 struct inode *ip_next_orphan; 59 60 struct ocfs2_caching_info ip_metadata_cache; 61 struct ocfs2_extent_map ip_extent_map; 62 struct inode vfs_inode; 63 struct jbd2_inode ip_jinode; 64 65 u32 ip_dir_start_lookup; 66 67 /* Only valid if the inode is the dir. */ 68 u32 ip_last_used_slot; 69 u64 ip_last_used_group; 70 u32 ip_dir_lock_gen; 71 72 struct ocfs2_alloc_reservation ip_la_data_resv; 73 }; 74 75 /* 76 * Flags for the ip_flags field 77 */ 78 /* System file inodes */ 79 #define OCFS2_INODE_SYSTEM_FILE 0x00000001 80 #define OCFS2_INODE_JOURNAL 0x00000002 81 #define OCFS2_INODE_BITMAP 0x00000004 82 /* This inode has been wiped from disk */ 83 #define OCFS2_INODE_DELETED 0x00000008 84 /* Another node is deleting, so our delete is a nop */ 85 #define OCFS2_INODE_SKIP_DELETE 0x00000010 86 /* Has the inode been orphaned on another node? 87 * 88 * This hints to ocfs2_drop_inode that it should clear i_nlink before 89 * continuing. 90 * 91 * We *only* set this on unlink vote from another node. If the inode 92 * was locally orphaned, then we're sure of the state and don't need 93 * to twiddle i_nlink later - it's either zero or not depending on 94 * whether our unlink succeeded. Otherwise we got this from a node 95 * whose intention was to orphan the inode, however he may have 96 * crashed, failed etc, so we let ocfs2_drop_inode zero the value and 97 * rely on ocfs2_delete_inode to sort things out under the proper 98 * cluster locks. 99 */ 100 #define OCFS2_INODE_MAYBE_ORPHANED 0x00000020 101 /* Does someone have the file open O_DIRECT */ 102 #define OCFS2_INODE_OPEN_DIRECT 0x00000040 103 /* Tell the inode wipe code it's not in orphan dir */ 104 #define OCFS2_INODE_SKIP_ORPHAN_DIR 0x00000080 105 106 static inline struct ocfs2_inode_info *OCFS2_I(struct inode *inode) 107 { 108 return container_of(inode, struct ocfs2_inode_info, vfs_inode); 109 } 110 111 #define INODE_JOURNAL(i) (OCFS2_I(i)->ip_flags & OCFS2_INODE_JOURNAL) 112 #define SET_INODE_JOURNAL(i) (OCFS2_I(i)->ip_flags |= OCFS2_INODE_JOURNAL) 113 114 extern struct kmem_cache *ocfs2_inode_cache; 115 116 extern const struct address_space_operations ocfs2_aops; 117 extern const struct ocfs2_caching_operations ocfs2_inode_caching_ops; 118 119 static inline struct ocfs2_caching_info *INODE_CACHE(struct inode *inode) 120 { 121 return &OCFS2_I(inode)->ip_metadata_cache; 122 } 123 124 void ocfs2_evict_inode(struct inode *inode); 125 int ocfs2_drop_inode(struct inode *inode); 126 127 /* Flags for ocfs2_iget() */ 128 #define OCFS2_FI_FLAG_SYSFILE 0x1 129 #define OCFS2_FI_FLAG_ORPHAN_RECOVERY 0x2 130 struct inode *ocfs2_ilookup(struct super_block *sb, u64 feoff); 131 struct inode *ocfs2_iget(struct ocfs2_super *osb, u64 feoff, unsigned flags, 132 int sysfile_type); 133 int ocfs2_inode_init_private(struct inode *inode); 134 int ocfs2_inode_revalidate(struct dentry *dentry); 135 void ocfs2_populate_inode(struct inode *inode, struct ocfs2_dinode *fe, 136 int create_ino); 137 void ocfs2_read_inode(struct inode *inode); 138 void ocfs2_read_inode2(struct inode *inode, void *opaque); 139 ssize_t ocfs2_rw_direct(int rw, struct file *filp, char *buf, 140 size_t size, loff_t *offp); 141 void ocfs2_sync_blockdev(struct super_block *sb); 142 void ocfs2_refresh_inode(struct inode *inode, 143 struct ocfs2_dinode *fe); 144 int ocfs2_mark_inode_dirty(handle_t *handle, 145 struct inode *inode, 146 struct buffer_head *bh); 147 int ocfs2_aio_read(struct file *file, struct kiocb *req, struct iocb *iocb); 148 int ocfs2_aio_write(struct file *file, struct kiocb *req, struct iocb *iocb); 149 struct buffer_head *ocfs2_bread(struct inode *inode, 150 int block, int *err, int reada); 151 152 void ocfs2_set_inode_flags(struct inode *inode); 153 void ocfs2_get_inode_flags(struct ocfs2_inode_info *oi); 154 155 static inline blkcnt_t ocfs2_inode_sector_count(struct inode *inode) 156 { 157 int c_to_s_bits = OCFS2_SB(inode->i_sb)->s_clustersize_bits - 9; 158 159 return (blkcnt_t)(OCFS2_I(inode)->ip_clusters << c_to_s_bits); 160 } 161 162 /* Validate that a bh contains a valid inode */ 163 int ocfs2_validate_inode_block(struct super_block *sb, 164 struct buffer_head *bh); 165 /* 166 * Read an inode block into *bh. If *bh is NULL, a bh will be allocated. 167 * This is a cached read. The inode will be validated with 168 * ocfs2_validate_inode_block(). 169 */ 170 int ocfs2_read_inode_block(struct inode *inode, struct buffer_head **bh); 171 /* The same, but can be passed OCFS2_BH_* flags */ 172 int ocfs2_read_inode_block_full(struct inode *inode, struct buffer_head **bh, 173 int flags); 174 175 static inline struct ocfs2_inode_info *cache_info_to_inode(struct ocfs2_caching_info *ci) 176 { 177 return container_of(ci, struct ocfs2_inode_info, ip_metadata_cache); 178 } 179 180 #endif /* OCFS2_INODE_H */ 181