release/src-rt-6.x/linux/linux-2.6/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 #include "extent_map.h"
  30
  31 /* OCFS2 Inode Private Data */
  32 struct ocfs2_inode_info
  33 {
  34         u64                     ip_blkno;
  35
  36         struct ocfs2_lock_res           ip_rw_lockres;
  37         struct ocfs2_lock_res           ip_meta_lockres;
  38         struct ocfs2_lock_res           ip_data_lockres;
  39         struct ocfs2_lock_res           ip_open_lockres;
  40
  41         /* protects allocation changes on this inode. */
  42         struct rw_semaphore             ip_alloc_sem;
  43
  44         /* These fields are protected by ip_lock */
  45         spinlock_t                      ip_lock;
  46         u32                             ip_open_count;
  47         u32                             ip_clusters;
  48         struct list_head                ip_io_markers;
  49
  50         struct mutex                    ip_io_mutex;
  51
  52         u32                             ip_flags; /* see below */
  53         u32                             ip_attr; /* inode attributes */
  54
  55         /* protected by recovery_lock. */
  56         struct inode                    *ip_next_orphan;
  57
  58         u32                             ip_dir_start_lookup;
  59
  60         /* next two are protected by trans_inc_lock */
  61         /* which transaction were we created on? Zero if none. */
  62         unsigned long                   ip_created_trans;
  63         /* last transaction we were a part of. */
  64         unsigned long                   ip_last_trans;
  65
  66         struct ocfs2_caching_info       ip_metadata_cache;
  67
  68         struct ocfs2_extent_map         ip_extent_map;
  69
  70         struct inode                    vfs_inode;
  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 /* Another node is deleting, so our delete is a nop */
  83 #define OCFS2_INODE_SKIP_DELETE         0x00000010
  84 /* Has the inode been orphaned on another node?
  85  *
  86  * This hints to ocfs2_drop_inode that it should clear i_nlink before
  87  * continuing.
  88  *
  89  * We *only* set this on unlink vote from another node. If the inode
  90  * was locally orphaned, then we're sure of the state and don't need
  91  * to twiddle i_nlink later - it's either zero or not depending on
  92  * whether our unlink succeeded. Otherwise we got this from a node
  93  * whose intention was to orphan the inode, however he may have
  94  * crashed, failed etc, so we let ocfs2_drop_inode zero the value and
  95  * rely on ocfs2_delete_inode to sort things out under the proper
  96  * cluster locks.
  97  */
  98 #define OCFS2_INODE_MAYBE_ORPHANED      0x00000020
  99 /* Does someone have the file open O_DIRECT */
 100 #define OCFS2_INODE_OPEN_DIRECT         0x00000040
 101 /* Indicates that the metadata cache should be used as an array. */
 102 #define OCFS2_INODE_CACHE_INLINE        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 struct kmem_cache *ocfs2_inode_cache;
 113
 114 extern const struct address_space_operations ocfs2_aops;
 115
 116 struct buffer_head *ocfs2_bread(struct inode *inode, int block,
 117                                 int *err, int reada);
 118 void ocfs2_clear_inode(struct inode *inode);
 119 void ocfs2_delete_inode(struct inode *inode);
 120 void ocfs2_drop_inode(struct inode *inode);
 121
 122 /* Flags for ocfs2_iget() */
 123 #define OCFS2_FI_FLAG_SYSFILE           0x4
 124 #define OCFS2_FI_FLAG_ORPHAN_RECOVERY   0x8
 125 struct inode *ocfs2_iget(struct ocfs2_super *osb, u64 feoff, int flags);
 126 int ocfs2_inode_init_private(struct inode *inode);
 127 int ocfs2_inode_revalidate(struct dentry *dentry);
 128 int ocfs2_populate_inode(struct inode *inode, struct ocfs2_dinode *fe,
 129                          int create_ino);
 130 void ocfs2_read_inode(struct inode *inode);
 131 void ocfs2_read_inode2(struct inode *inode, void *opaque);
 132 ssize_t ocfs2_rw_direct(int rw, struct file *filp, char *buf,
 133                         size_t size, loff_t *offp);
 134 void ocfs2_sync_blockdev(struct super_block *sb);
 135 void ocfs2_refresh_inode(struct inode *inode,
 136                          struct ocfs2_dinode *fe);
 137 int ocfs2_mark_inode_dirty(handle_t *handle,
 138                            struct inode *inode,
 139                            struct buffer_head *bh);
 140 int ocfs2_aio_read(struct file *file, struct kiocb *req, struct iocb *iocb);
 141 int ocfs2_aio_write(struct file *file, struct kiocb *req, struct iocb *iocb);
 142
 143 void ocfs2_set_inode_flags(struct inode *inode);
 144 void ocfs2_get_inode_flags(struct ocfs2_inode_info *oi);
 145
 146 static inline blkcnt_t ocfs2_inode_sector_count(struct inode *inode)
 147 {
 148         int c_to_s_bits = OCFS2_SB(inode->i_sb)->s_clustersize_bits - 9;
 149
 150         return (blkcnt_t)(OCFS2_I(inode)->ip_clusters << c_to_s_bits);
 151 }
 152
 153 #endif /* OCFS2_INODE_H */