Linux kernel & device driver programming

Cross-Referenced Linux and Device Driver Code

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Version: [ 2.6.11.8 ] [ 2.6.25 ] [ 2.6.25.8 ] [ 2.6.31.13 ] Architecture: [ i386 ] 
  1 /* internal.h: internal AFS stuff
  2  *
  3  * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
  4  * Written by David Howells (dhowells@redhat.com)
  5  *
  6  * This program is free software; you can redistribute it and/or
  7  * modify it under the terms of the GNU General Public License
  8  * as published by the Free Software Foundation; either version
  9  * 2 of the License, or (at your option) any later version.
 10  */
 11 
 12 #ifndef AFS_INTERNAL_H
 13 #define AFS_INTERNAL_H
 14 
 15 #include <linux/compiler.h>
 16 #include <linux/kernel.h>
 17 #include <linux/fs.h>
 18 #include <linux/pagemap.h>
 19 
 20 /*
 21  * debug tracing
 22  */
 23 #define kenter(FMT, a...)       printk("==> %s("FMT")\n",__FUNCTION__ , ## a)
 24 #define kleave(FMT, a...)       printk("<== %s()"FMT"\n",__FUNCTION__ , ## a)
 25 #define kdebug(FMT, a...)       printk(FMT"\n" , ## a)
 26 #define kproto(FMT, a...)       printk("### "FMT"\n" , ## a)
 27 #define knet(FMT, a...)         printk(FMT"\n" , ## a)
 28 
 29 #ifdef __KDEBUG
 30 #define _enter(FMT, a...)       kenter(FMT , ## a)
 31 #define _leave(FMT, a...)       kleave(FMT , ## a)
 32 #define _debug(FMT, a...)       kdebug(FMT , ## a)
 33 #define _proto(FMT, a...)       kproto(FMT , ## a)
 34 #define _net(FMT, a...)         knet(FMT , ## a)
 35 #else
 36 #define _enter(FMT, a...)       do { } while(0)
 37 #define _leave(FMT, a...)       do { } while(0)
 38 #define _debug(FMT, a...)       do { } while(0)
 39 #define _proto(FMT, a...)       do { } while(0)
 40 #define _net(FMT, a...)         do { } while(0)
 41 #endif
 42 
 43 static inline void afs_discard_my_signals(void)
 44 {
 45         while (signal_pending(current)) {
 46                 siginfo_t sinfo;
 47 
 48                 spin_lock_irq(&current->sighand->siglock);
 49                 dequeue_signal(current,&current->blocked, &sinfo);
 50                 spin_unlock_irq(&current->sighand->siglock);
 51         }
 52 }
 53 
 54 /*
 55  * cell.c
 56  */
 57 extern struct rw_semaphore afs_proc_cells_sem;
 58 extern struct list_head afs_proc_cells;
 59 #ifdef AFS_CACHING_SUPPORT
 60 extern struct cachefs_index_def afs_cache_cell_index_def;
 61 #endif
 62 
 63 /*
 64  * dir.c
 65  */
 66 extern struct inode_operations afs_dir_inode_operations;
 67 extern struct file_operations afs_dir_file_operations;
 68 
 69 /*
 70  * file.c
 71  */
 72 extern struct address_space_operations afs_fs_aops;
 73 extern struct inode_operations afs_file_inode_operations;
 74 extern struct file_operations afs_file_file_operations;
 75 
 76 #ifdef AFS_CACHING_SUPPORT
 77 extern int afs_cache_get_page_cookie(struct page *page,
 78                                      struct cachefs_page **_page_cookie);
 79 #endif
 80 
 81 /*
 82  * inode.c
 83  */
 84 extern int afs_iget(struct super_block *sb, struct afs_fid *fid,
 85                     struct inode **_inode);
 86 extern int afs_inode_getattr(struct vfsmount *mnt, struct dentry *dentry,
 87                              struct kstat *stat);
 88 extern void afs_clear_inode(struct inode *inode);
 89 
 90 /*
 91  * key_afs.c
 92  */
 93 #ifdef CONFIG_KEYS
 94 extern int afs_key_register(void);
 95 extern void afs_key_unregister(void);
 96 #endif
 97 
 98 /*
 99  * main.c
100  */
101 #ifdef AFS_CACHING_SUPPORT
102 extern struct cachefs_netfs afs_cache_netfs;
103 #endif
104 
105 /*
106  * mntpt.c
107  */
108 extern struct inode_operations afs_mntpt_inode_operations;
109 extern struct file_operations afs_mntpt_file_operations;
110 extern struct afs_timer afs_mntpt_expiry_timer;
111 extern struct afs_timer_ops afs_mntpt_expiry_timer_ops;
112 extern unsigned long afs_mntpt_expiry_timeout;
113 
114 extern int afs_mntpt_check_symlink(struct afs_vnode *vnode);
115 
116 /*
117  * super.c
118  */
119 extern int afs_fs_init(void);
120 extern void afs_fs_exit(void);
121 
122 #define AFS_CB_HASH_COUNT (PAGE_SIZE / sizeof(struct list_head))
123 
124 extern struct list_head afs_cb_hash_tbl[];
125 extern spinlock_t afs_cb_hash_lock;
126 
127 #define afs_cb_hash(SRV,FID) \
128         afs_cb_hash_tbl[((unsigned long)(SRV) + \
129                         (FID)->vid + (FID)->vnode + (FID)->unique) % \
130                         AFS_CB_HASH_COUNT]
131 
132 /*
133  * proc.c
134  */
135 extern int afs_proc_init(void);
136 extern void afs_proc_cleanup(void);
137 extern int afs_proc_cell_setup(struct afs_cell *cell);
138 extern void afs_proc_cell_remove(struct afs_cell *cell);
139 
140 #endif /* AFS_INTERNAL_H */
141
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