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TOMOYO Linux Cross Reference
Linux/fs/ocfs2/inode.h

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  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 

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