xref: /openbmc/linux/fs/ocfs2/inode.h (revision 42954c37)
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