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TOMOYO Linux Cross Reference
Linux/fs/internal.h

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  1 /* fs/ internal definitions
  2  *
  3  * Copyright (C) 2006 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 struct super_block;
 13 struct file_system_type;
 14 struct iomap;
 15 struct iomap_ops;
 16 struct linux_binprm;
 17 struct path;
 18 struct mount;
 19 struct shrink_control;
 20 
 21 /*
 22  * block_dev.c
 23  */
 24 #ifdef CONFIG_BLOCK
 25 extern void __init bdev_cache_init(void);
 26 
 27 extern int __sync_blockdev(struct block_device *bdev, int wait);
 28 
 29 #else
 30 static inline void bdev_cache_init(void)
 31 {
 32 }
 33 
 34 static inline int __sync_blockdev(struct block_device *bdev, int wait)
 35 {
 36         return 0;
 37 }
 38 #endif
 39 
 40 /*
 41  * buffer.c
 42  */
 43 extern void guard_bio_eod(int rw, struct bio *bio);
 44 extern int __block_write_begin_int(struct page *page, loff_t pos, unsigned len,
 45                 get_block_t *get_block, struct iomap *iomap);
 46 
 47 /*
 48  * char_dev.c
 49  */
 50 extern void __init chrdev_init(void);
 51 
 52 /*
 53  * namei.c
 54  */
 55 extern int user_path_mountpoint_at(int, const char __user *, unsigned int, struct path *);
 56 extern int vfs_path_lookup(struct dentry *, struct vfsmount *,
 57                            const char *, unsigned int, struct path *);
 58 long do_mknodat(int dfd, const char __user *filename, umode_t mode,
 59                 unsigned int dev);
 60 long do_mkdirat(int dfd, const char __user *pathname, umode_t mode);
 61 long do_rmdir(int dfd, const char __user *pathname);
 62 long do_unlinkat(int dfd, struct filename *name);
 63 long do_symlinkat(const char __user *oldname, int newdfd,
 64                   const char __user *newname);
 65 int do_linkat(int olddfd, const char __user *oldname, int newdfd,
 66               const char __user *newname, int flags);
 67 
 68 /*
 69  * namespace.c
 70  */
 71 extern void *copy_mount_options(const void __user *);
 72 extern char *copy_mount_string(const void __user *);
 73 
 74 extern struct vfsmount *lookup_mnt(const struct path *);
 75 extern int finish_automount(struct vfsmount *, struct path *);
 76 
 77 extern int sb_prepare_remount_readonly(struct super_block *);
 78 
 79 extern void __init mnt_init(void);
 80 
 81 extern int __mnt_want_write(struct vfsmount *);
 82 extern int __mnt_want_write_file(struct file *);
 83 extern int mnt_want_write_file_path(struct file *);
 84 extern void __mnt_drop_write(struct vfsmount *);
 85 extern void __mnt_drop_write_file(struct file *);
 86 extern void mnt_drop_write_file_path(struct file *);
 87 
 88 /*
 89  * fs_struct.c
 90  */
 91 extern void chroot_fs_refs(const struct path *, const struct path *);
 92 
 93 /*
 94  * file_table.c
 95  */
 96 extern struct file *get_empty_filp(void);
 97 
 98 /*
 99  * super.c
100  */
101 extern int do_remount_sb(struct super_block *, int, void *, int);
102 extern bool trylock_super(struct super_block *sb);
103 extern struct dentry *mount_fs(struct file_system_type *,
104                                int, const char *, void *);
105 extern struct super_block *user_get_super(dev_t);
106 
107 /*
108  * open.c
109  */
110 struct open_flags {
111         int open_flag;
112         umode_t mode;
113         int acc_mode;
114         int intent;
115         int lookup_flags;
116 };
117 extern struct file *do_filp_open(int dfd, struct filename *pathname,
118                 const struct open_flags *op);
119 extern struct file *do_file_open_root(struct dentry *, struct vfsmount *,
120                 const char *, const struct open_flags *);
121 
122 long do_sys_ftruncate(unsigned int fd, loff_t length, int small);
123 long do_faccessat(int dfd, const char __user *filename, int mode);
124 int do_fchmodat(int dfd, const char __user *filename, umode_t mode);
125 int do_fchownat(int dfd, const char __user *filename, uid_t user, gid_t group,
126                 int flag);
127 
128 extern int open_check_o_direct(struct file *f);
129 extern int vfs_open(const struct path *, struct file *, const struct cred *);
130 
131 /*
132  * inode.c
133  */
134 extern long prune_icache_sb(struct super_block *sb, struct shrink_control *sc);
135 extern void inode_add_lru(struct inode *inode);
136 extern int dentry_needs_remove_privs(struct dentry *dentry);
137 
138 extern bool __atime_needs_update(const struct path *, struct inode *, bool);
139 static inline bool atime_needs_update_rcu(const struct path *path,
140                                           struct inode *inode)
141 {
142         return __atime_needs_update(path, inode, true);
143 }
144 
145 /*
146  * fs-writeback.c
147  */
148 extern void inode_io_list_del(struct inode *inode);
149 
150 extern long get_nr_dirty_inodes(void);
151 extern int invalidate_inodes(struct super_block *, bool);
152 
153 /*
154  * dcache.c
155  */
156 extern struct dentry *__d_alloc(struct super_block *, const struct qstr *);
157 extern int d_set_mounted(struct dentry *dentry);
158 extern long prune_dcache_sb(struct super_block *sb, struct shrink_control *sc);
159 extern struct dentry *d_alloc_cursor(struct dentry *);
160 
161 /*
162  * read_write.c
163  */
164 extern int rw_verify_area(int, struct file *, const loff_t *, size_t);
165 
166 /*
167  * pipe.c
168  */
169 extern const struct file_operations pipefifo_fops;
170 
171 /*
172  * fs_pin.c
173  */
174 extern void group_pin_kill(struct hlist_head *p);
175 extern void mnt_pin_kill(struct mount *m);
176 
177 /*
178  * fs/nsfs.c
179  */
180 extern const struct dentry_operations ns_dentry_operations;
181 
182 /*
183  * fs/ioctl.c
184  */
185 extern int do_vfs_ioctl(struct file *file, unsigned int fd, unsigned int cmd,
186                     unsigned long arg);
187 extern long vfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
188 
189 /*
190  * iomap support:
191  */
192 typedef loff_t (*iomap_actor_t)(struct inode *inode, loff_t pos, loff_t len,
193                 void *data, struct iomap *iomap);
194 
195 loff_t iomap_apply(struct inode *inode, loff_t pos, loff_t length,
196                 unsigned flags, const struct iomap_ops *ops, void *data,
197                 iomap_actor_t actor);
198 
199 /* direct-io.c: */
200 int sb_init_dio_done_wq(struct super_block *sb);
201 

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