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
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
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
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
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? */
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
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