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         u32                             ip_attr; /* inode attributes */
  60
  61         /* protected by recovery_lock. */
  62         struct inode                    *ip_next_orphan;
  63
  64         u32                             ip_dir_start_lookup;
  65
  66         /* next two are protected by trans_inc_lock */
  67         /* which transaction were we created on? Zero if none. */
  68         unsigned long                   ip_created_trans;
  69         /* last transaction we were a part of. */
  70         unsigned long                   ip_last_trans;
  71
  72         struct ocfs2_caching_info       ip_metadata_cache;
  73
  74         struct inode                    vfs_inode;
  75 };
  76
  77 /*
  78  * Flags for the ip_flags field
  79  */
  80 /* System file inodes  */
  81 #define OCFS2_INODE_SYSTEM_FILE         0x00000001
  82 #define OCFS2_INODE_JOURNAL             0x00000002
  83 #define OCFS2_INODE_BITMAP              0x00000004
  84 /* This inode has been wiped from disk */
  85 #define OCFS2_INODE_DELETED             0x00000008
  86 /* Another node is deleting, so our delete is a nop */
  87 #define OCFS2_INODE_SKIP_DELETE         0x00000010
  88 /* Has the inode been orphaned on another node?
  89  *
  90  * This hints to ocfs2_drop_inode that it should clear i_nlink before
  91  * continuing.
  92  *
  93  * We *only* set this on unlink vote from another node. If the inode
  94  * was locally orphaned, then we're sure of the state and don't need
  95  * to twiddle i_nlink later - it's either zero or not depending on
  96  * whether our unlink succeeded. Otherwise we got this from a node
  97  * whose intention was to orphan the inode, however he may have
  98  * crashed, failed etc, so we let ocfs2_drop_inode zero the value and
  99  * rely on ocfs2_delete_inode to sort things out under the proper
 100  * cluster locks.
 101  */
 102 #define OCFS2_INODE_MAYBE_ORPHANED      0x00000020
 103 /* Does someone have the file open O_DIRECT */
 104 #define OCFS2_INODE_OPEN_DIRECT         0x00000040
 105 /* Indicates that the metadata cache should be used as an array. */
 106 #define OCFS2_INODE_CACHE_INLINE        0x00000080
 107
 108 static inline struct ocfs2_inode_info *OCFS2_I(struct inode *inode)
 109 {
 110         return container_of(inode, struct ocfs2_inode_info, vfs_inode);
 111 }
 112
 113 #define INODE_JOURNAL(i) (OCFS2_I(i)->ip_flags & OCFS2_INODE_JOURNAL)
 114 #define SET_INODE_JOURNAL(i) (OCFS2_I(i)->ip_flags |= OCFS2_INODE_JOURNAL)
 115
 116 extern kmem_cache_t *ocfs2_inode_cache;
 117
 118 extern const struct address_space_operations ocfs2_aops;
 119
 120 struct buffer_head *ocfs2_bread(struct inode *inode, int block,
 121                                 int *err, int reada);
 122 void ocfs2_clear_inode(struct inode *inode);
 123 void ocfs2_delete_inode(struct inode *inode);
 124 void ocfs2_drop_inode(struct inode *inode);
 125
 126 /* Flags for ocfs2_iget() */
 127 #define OCFS2_FI_FLAG_NOWAIT    0x1
 128 #define OCFS2_FI_FLAG_DELETE    0x2
 129 #define OCFS2_FI_FLAG_SYSFILE   0x4
 130 #define OCFS2_FI_FLAG_NOLOCK    0x8
 131 struct inode *ocfs2_iget(struct ocfs2_super *osb, u64 feoff, int flags);
 132 struct inode *ocfs2_ilookup_for_vote(struct ocfs2_super *osb,
 133                                      u64 blkno,
 134                                      int delete_vote);
 135 int ocfs2_inode_init_private(struct inode *inode);
 136 int ocfs2_inode_revalidate(struct dentry *dentry);
 137 int ocfs2_populate_inode(struct inode *inode, struct ocfs2_dinode *fe,
 138                          int create_ino);
 139 void ocfs2_read_inode(struct inode *inode);
 140 void ocfs2_read_inode2(struct inode *inode, void *opaque);
 141 ssize_t ocfs2_rw_direct(int rw, struct file *filp, char *buf,
 142                         size_t size, loff_t *offp);
 143 void ocfs2_sync_blockdev(struct super_block *sb);
 144 void ocfs2_refresh_inode(struct inode *inode,
 145                          struct ocfs2_dinode *fe);
 146 int ocfs2_mark_inode_dirty(struct ocfs2_journal_handle *handle,
 147                            struct inode *inode,
 148                            struct buffer_head *bh);
 149 int ocfs2_aio_read(struct file *file, struct kiocb *req, struct iocb *iocb);
 150 int ocfs2_aio_write(struct file *file, struct kiocb *req, struct iocb *iocb);
 151
 152 void ocfs2_set_inode_flags(struct inode *inode);
 153
 154 #endif /* OCFS2_INODE_H */