fs/ocfs2/inode.h

   1 /* -*- mode: c; c-basic-offset: 8; -*-
   2  * vim: noexpandtab sw=8 ts=8 sts=0:
   3  *
   4  * inode.h
   5  *
   6  * Function prototypes
   7  *
   8  * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
   9  *
  10  * This program is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU General Public
  12  * License as published by the Free Software Foundation; either
  13  * version 2 of the License, or (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18  * General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public
  21  * License along with this program; if not, write to the
  22  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  23  * Boston, MA 021110-1307, USA.
  24  */
  25
  26 #ifndef OCFS2_INODE_H
  27 #define OCFS2_INODE_H
  28
  29 /* OCFS2 Inode Private Data */
  30 struct ocfs2_inode_info
  31 {
  32         u64                     ip_blkno;
  33
  34         struct ocfs2_lock_res           ip_rw_lockres;
  35         struct ocfs2_lock_res           ip_meta_lockres;
  36         struct ocfs2_lock_res           ip_data_lockres;
  37
  38         /* protects allocation changes on this inode. */
  39         struct rw_semaphore             ip_alloc_sem;
  40
  41         /* These fields are protected by ip_lock */
  42         spinlock_t                      ip_lock;
  43         u32                             ip_open_count;
  44         u32                             ip_clusters;
  45         struct ocfs2_extent_map         ip_map;
  46         struct list_head                ip_io_markers;
  47         int                             ip_orphaned_slot;
  48
  49         struct mutex                    ip_io_mutex;
  50
  51         /* Used by the journalling code to attach an inode to a
  52          * handle.  These are protected by ip_io_mutex in order to lock
  53          * out other I/O to the inode until we either commit or
  54          * abort. */
  55         struct list_head                ip_handle_list;
  56         struct ocfs2_journal_handle     *ip_handle;
  57
  58         u32                             ip_flags; /* see below */
  59
  60         /* protected by recovery_lock. */
  61         struct inode                    *ip_next_orphan;
  62
  63         u32                             ip_dir_start_lookup;
  64
  65         /* next two are protected by trans_inc_lock */
  66         /* which transaction were we created on? Zero if none. */
  67         unsigned long                   ip_created_trans;
  68         /* last transaction we were a part of. */
  69         unsigned long                   ip_last_trans;
  70
  71         struct ocfs2_caching_info       ip_metadata_cache;
  72
  73         struct inode                    vfs_inode;
  74 };
  75
  76 /*
  77  * Flags for the ip_flags field
  78  */
  79 /* System file inodes  */
  80 #define OCFS2_INODE_SYSTEM_FILE         0x00000001
  81 #define OCFS2_INODE_JOURNAL             0x00000002
  82 #define OCFS2_INODE_BITMAP              0x00000004
  83 /* This inode has been wiped from disk */
  84 #define OCFS2_INODE_DELETED             0x00000008
  85 /* Another node is deleting, so our delete is a nop */
  86 #define OCFS2_INODE_SKIP_DELETE         0x00000010
  87 /* Has the inode been orphaned on another node?
  88  *
  89  * This hints to ocfs2_drop_inode that it should clear i_nlink before
  90  * continuing.
  91  *
  92  * We *only* set this on unlink vote from another node. If the inode
  93  * was locally orphaned, then we're sure of the state and don't need
  94  * to twiddle i_nlink later - it's either zero or not depending on
  95  * whether our unlink succeeded. Otherwise we got this from a node
  96  * whose intention was to orphan the inode, however he may have
  97  * crashed, failed etc, so we let ocfs2_drop_inode zero the value and
  98  * rely on ocfs2_delete_inode to sort things out under the proper
  99  * cluster locks.
 100  */
 101 #define OCFS2_INODE_MAYBE_ORPHANED      0x00000020
 102 /* Does someone have the file open O_DIRECT */
 103 #define OCFS2_INODE_OPEN_DIRECT         0x00000040
 104 /* Indicates that the metadata cache should be used as an array. */
 105 #define OCFS2_INODE_CACHE_INLINE        0x00000080
 106
 107 static inline struct ocfs2_inode_info *OCFS2_I(struct inode *inode)
 108 {
 109         return container_of(inode, struct ocfs2_inode_info, vfs_inode);
 110 }
 111
 112 #define INODE_JOURNAL(i) (OCFS2_I(i)->ip_flags & OCFS2_INODE_JOURNAL)
 113 #define SET_INODE_JOURNAL(i) (OCFS2_I(i)->ip_flags |= OCFS2_INODE_JOURNAL)
 114
 115 extern kmem_cache_t *ocfs2_inode_cache;
 116
 117 extern const struct address_space_operations ocfs2_aops;
 118
 119 struct buffer_head *ocfs2_bread(struct inode *inode, int block,
 120                                 int *err, int reada);
 121 void ocfs2_clear_inode(struct inode *inode);
 122 void ocfs2_delete_inode(struct inode *inode);
 123 void ocfs2_drop_inode(struct inode *inode);
 124 struct inode *ocfs2_iget(struct ocfs2_super *osb, u64 feoff);
 125 struct inode *ocfs2_ilookup_for_vote(struct ocfs2_super *osb,
 126                                      u64 blkno,
 127                                      int delete_vote);
 128 int ocfs2_inode_init_private(struct inode *inode);
 129 int ocfs2_inode_revalidate(struct dentry *dentry);
 130 int ocfs2_populate_inode(struct inode *inode, struct ocfs2_dinode *fe,
 131                          int create_ino);
 132 void ocfs2_read_inode(struct inode *inode);
 133 void ocfs2_read_inode2(struct inode *inode, void *opaque);
 134 ssize_t ocfs2_rw_direct(int rw, struct file *filp, char *buf,
 135                         size_t size, loff_t *offp);
 136 void ocfs2_sync_blockdev(struct super_block *sb);
 137 void ocfs2_refresh_inode(struct inode *inode,
 138                          struct ocfs2_dinode *fe);
 139 int ocfs2_mark_inode_dirty(struct ocfs2_journal_handle *handle,
 140                            struct inode *inode,
 141                            struct buffer_head *bh);
 142 int ocfs2_aio_read(struct file *file, struct kiocb *req, struct iocb *iocb);
 143 int ocfs2_aio_write(struct file *file, struct kiocb *req, struct iocb *iocb);
 144
 145 #endif /* OCFS2_INODE_H */