fs/ocfs2/inode.h

   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 */