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