1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* -*- mode: c; c-basic-offset: 8; -*- 3 * vim: noexpandtab sw=8 ts=8 sts=0: 4 * 5 * inode.h 6 * 7 * Function prototypes 8 * 9 * Copyright (C) 2002, 2004 Oracle. All rights reserved. 10 */ 11 12 #ifndef OCFS2_INODE_H 13 #define OCFS2_INODE_H 14 15 #include "extent_map.h" 16 17 /* OCFS2 Inode Private Data */ 18 struct ocfs2_inode_info 19 { 20 u64 ip_blkno; 21 22 struct ocfs2_lock_res ip_rw_lockres; 23 struct ocfs2_lock_res ip_inode_lockres; 24 struct ocfs2_lock_res ip_open_lockres; 25 26 /* protects allocation changes on this inode. */ 27 struct rw_semaphore ip_alloc_sem; 28 29 /* protects extended attribute changes on this inode */ 30 struct rw_semaphore ip_xattr_sem; 31 32 /* These fields are protected by ip_lock */ 33 spinlock_t ip_lock; 34 u32 ip_open_count; 35 struct list_head ip_io_markers; 36 u32 ip_clusters; 37 38 u16 ip_dyn_features; 39 struct mutex ip_io_mutex; 40 u32 ip_flags; /* see below */ 41 u32 ip_attr; /* inode attributes */ 42 43 /* Record unwritten extents during direct io. */ 44 struct list_head ip_unwritten_list; 45 46 /* protected by recovery_lock. */ 47 struct inode *ip_next_orphan; 48 49 struct ocfs2_caching_info ip_metadata_cache; 50 struct ocfs2_extent_map ip_extent_map; 51 struct inode vfs_inode; 52 struct jbd2_inode ip_jinode; 53 54 u32 ip_dir_start_lookup; 55 56 /* Only valid if the inode is the dir. */ 57 u32 ip_last_used_slot; 58 u64 ip_last_used_group; 59 u32 ip_dir_lock_gen; 60 61 struct ocfs2_alloc_reservation ip_la_data_resv; 62 63 /* 64 * Transactions that contain inode's metadata needed to complete 65 * fsync and fdatasync, respectively. 66 */ 67 tid_t i_sync_tid; 68 tid_t i_datasync_tid; 69 70 struct dquot *i_dquot[MAXQUOTAS]; 71 }; 72 73 /* 74 * Flags for the ip_flags field 75 */ 76 /* System file inodes */ 77 #define OCFS2_INODE_SYSTEM_FILE 0x00000001 78 #define OCFS2_INODE_JOURNAL 0x00000002 79 #define OCFS2_INODE_BITMAP 0x00000004 80 /* This inode has been wiped from disk */ 81 #define OCFS2_INODE_DELETED 0x00000008 82 /* Has the inode been orphaned on another node? 83 * 84 * This hints to ocfs2_drop_inode that it should clear i_nlink before 85 * continuing. 86 * 87 * We *only* set this on unlink vote from another node. If the inode 88 * was locally orphaned, then we're sure of the state and don't need 89 * to twiddle i_nlink later - it's either zero or not depending on 90 * whether our unlink succeeded. Otherwise we got this from a node 91 * whose intention was to orphan the inode, however he may have 92 * crashed, failed etc, so we let ocfs2_drop_inode zero the value and 93 * rely on ocfs2_delete_inode to sort things out under the proper 94 * cluster locks. 95 */ 96 #define OCFS2_INODE_MAYBE_ORPHANED 0x00000010 97 /* Does someone have the file open O_DIRECT */ 98 #define OCFS2_INODE_OPEN_DIRECT 0x00000020 99 /* Tell the inode wipe code it's not in orphan dir */ 100 #define OCFS2_INODE_SKIP_ORPHAN_DIR 0x00000040 101 /* Entry in orphan dir with 'dio-' prefix */ 102 #define OCFS2_INODE_DIO_ORPHAN_ENTRY 0x00000080 103 104 static inline struct ocfs2_inode_info *OCFS2_I(struct inode *inode) 105 { 106 return container_of(inode, struct ocfs2_inode_info, vfs_inode); 107 } 108 109 #define INODE_JOURNAL(i) (OCFS2_I(i)->ip_flags & OCFS2_INODE_JOURNAL) 110 #define SET_INODE_JOURNAL(i) (OCFS2_I(i)->ip_flags |= OCFS2_INODE_JOURNAL) 111 112 extern const struct address_space_operations ocfs2_aops; 113 extern const struct ocfs2_caching_operations ocfs2_inode_caching_ops; 114 115 static inline struct ocfs2_caching_info *INODE_CACHE(struct inode *inode) 116 { 117 return &OCFS2_I(inode)->ip_metadata_cache; 118 } 119 120 void ocfs2_evict_inode(struct inode *inode); 121 int ocfs2_drop_inode(struct inode *inode); 122 123 /* Flags for ocfs2_iget() */ 124 #define OCFS2_FI_FLAG_SYSFILE 0x1 125 #define OCFS2_FI_FLAG_ORPHAN_RECOVERY 0x2 126 #define OCFS2_FI_FLAG_FILECHECK_CHK 0x4 127 #define OCFS2_FI_FLAG_FILECHECK_FIX 0x8 128 129 struct inode *ocfs2_ilookup(struct super_block *sb, u64 feoff); 130 struct inode *ocfs2_iget(struct ocfs2_super *osb, u64 feoff, unsigned flags, 131 int sysfile_type); 132 int ocfs2_inode_revalidate(struct dentry *dentry); 133 void ocfs2_populate_inode(struct inode *inode, struct ocfs2_dinode *fe, 134 int create_ino); 135 void ocfs2_sync_blockdev(struct super_block *sb); 136 void ocfs2_refresh_inode(struct inode *inode, 137 struct ocfs2_dinode *fe); 138 int ocfs2_mark_inode_dirty(handle_t *handle, 139 struct inode *inode, 140 struct buffer_head *bh); 141 142 void ocfs2_set_inode_flags(struct inode *inode); 143 void ocfs2_get_inode_flags(struct ocfs2_inode_info *oi); 144 145 static inline blkcnt_t ocfs2_inode_sector_count(struct inode *inode) 146 { 147 int c_to_s_bits = OCFS2_SB(inode->i_sb)->s_clustersize_bits - 9; 148 149 return (blkcnt_t)OCFS2_I(inode)->ip_clusters << c_to_s_bits; 150 } 151 152 /* Validate that a bh contains a valid inode */ 153 int ocfs2_validate_inode_block(struct super_block *sb, 154 struct buffer_head *bh); 155 /* 156 * Read an inode block into *bh. If *bh is NULL, a bh will be allocated. 157 * This is a cached read. The inode will be validated with 158 * ocfs2_validate_inode_block(). 159 */ 160 int ocfs2_read_inode_block(struct inode *inode, struct buffer_head **bh); 161 /* The same, but can be passed OCFS2_BH_* flags */ 162 int ocfs2_read_inode_block_full(struct inode *inode, struct buffer_head **bh, 163 int flags); 164 165 static inline struct ocfs2_inode_info *cache_info_to_inode(struct ocfs2_caching_info *ci) 166 { 167 return container_of(ci, struct ocfs2_inode_info, ip_metadata_cache); 168 } 169 170 /* Does this inode have the reflink flag set? */ 171 static inline bool ocfs2_is_refcount_inode(struct inode *inode) 172 { 173 return (OCFS2_I(inode)->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL); 174 } 175 176 #endif /* OCFS2_INODE_H */ 177