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         struct ocfs2_lock_res           ip_open_lockres;
  38
  39         /* protects allocation changes on this inode. */
  40         struct rw_semaphore             ip_alloc_sem;
  41
  42         /* These fields are protected by ip_lock */
  43         spinlock_t                      ip_lock;
  44         u32                             ip_open_count;
  45         u32                             ip_clusters;
  46         struct list_head                ip_io_markers;
  47
  48         struct mutex                    ip_io_mutex;
  49
  50         u32                             ip_flags; /* see below */
  51         u32                             ip_attr; /* inode attributes */
  52
  53         /* protected by recovery_lock. */
  54         struct inode                    *ip_next_orphan;
  55
  56         u32                             ip_dir_start_lookup;
  57
  58         /* next two are protected by trans_inc_lock */
  59         /* which transaction were we created on? Zero if none. */
  60         unsigned long                   ip_created_trans;
  61         /* last transaction we were a part of. */
  62         unsigned long                   ip_last_trans;
  63
  64         struct ocfs2_caching_info       ip_metadata_cache;
  65
  66         struct inode                    vfs_inode;
  67 };
  68
  69 /*
  70  * Flags for the ip_flags field
  71  */
  72 /* System file inodes  */
  73 #define OCFS2_INODE_SYSTEM_FILE         0x00000001
  74 #define OCFS2_INODE_JOURNAL             0x00000002
  75 #define OCFS2_INODE_BITMAP              0x00000004
  76 /* This inode has been wiped from disk */
  77 #define OCFS2_INODE_DELETED             0x00000008
  78 /* Another node is deleting, so our delete is a nop */
  79 #define OCFS2_INODE_SKIP_DELETE         0x00000010
  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      0x00000020
  95 /* Does someone have the file open O_DIRECT */
  96 #define OCFS2_INODE_OPEN_DIRECT         0x00000040
  97 /* Indicates that the metadata cache should be used as an array. */
  98 #define OCFS2_INODE_CACHE_INLINE        0x00000080
  99
 100 static inline struct ocfs2_inode_info *OCFS2_I(struct inode *inode)
 101 {
 102         return container_of(inode, struct ocfs2_inode_info, vfs_inode);
 103 }
 104
 105 #define INODE_JOURNAL(i) (OCFS2_I(i)->ip_flags & OCFS2_INODE_JOURNAL)
 106 #define SET_INODE_JOURNAL(i) (OCFS2_I(i)->ip_flags |= OCFS2_INODE_JOURNAL)
 107
 108 extern struct kmem_cache *ocfs2_inode_cache;
 109
 110 extern const struct address_space_operations ocfs2_aops;
 111
 112 struct buffer_head *ocfs2_bread(struct inode *inode, int block,
 113                                 int *err, int reada);
 114 void ocfs2_clear_inode(struct inode *inode);
 115 void ocfs2_delete_inode(struct inode *inode);
 116 void ocfs2_drop_inode(struct inode *inode);
 117
 118 /* Flags for ocfs2_iget() */
 119 #define OCFS2_FI_FLAG_SYSFILE           0x4
 120 #define OCFS2_FI_FLAG_ORPHAN_RECOVERY   0x8
 121 struct inode *ocfs2_iget(struct ocfs2_super *osb, u64 feoff, int flags);
 122 int ocfs2_inode_init_private(struct inode *inode);
 123 int ocfs2_inode_revalidate(struct dentry *dentry);
 124 int ocfs2_populate_inode(struct inode *inode, struct ocfs2_dinode *fe,
 125                          int create_ino);
 126 void ocfs2_read_inode(struct inode *inode);
 127 void ocfs2_read_inode2(struct inode *inode, void *opaque);
 128 ssize_t ocfs2_rw_direct(int rw, struct file *filp, char *buf,
 129                         size_t size, loff_t *offp);
 130 void ocfs2_sync_blockdev(struct super_block *sb);
 131 void ocfs2_refresh_inode(struct inode *inode,
 132                          struct ocfs2_dinode *fe);
 133 int ocfs2_mark_inode_dirty(handle_t *handle,
 134                            struct inode *inode,
 135                            struct buffer_head *bh);
 136 int ocfs2_aio_read(struct file *file, struct kiocb *req, struct iocb *iocb);
 137 int ocfs2_aio_write(struct file *file, struct kiocb *req, struct iocb *iocb);
 138
 139 void ocfs2_set_inode_flags(struct inode *inode);
 140
 141 static inline blkcnt_t ocfs2_inode_sector_count(struct inode *inode)
 142 {
 143         int c_to_s_bits = OCFS2_SB(inode->i_sb)->s_clustersize_bits - 9;
 144
 145         return (blkcnt_t)(OCFS2_I(inode)->ip_clusters << c_to_s_bits);
 146 }
 147
 148 #endif /* OCFS2_INODE_H */