root/fs/ocfs2/inode.h

INCLUDED FROM

DEFINITIONS

1. OCFS2_I
2. INODE_CACHE
3. ocfs2_inode_sector_count
4. cache_info_to_inode
5. ocfs2_is_refcount_inode

   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 */