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 extern struct file *filp_clone_open(struct file *); 131 132 /* 133 * inode.c 134 */ 135 extern long prune_icache_sb(struct super_block *sb, struct shrink_control *sc); 136 extern void inode_add_lru(struct inode *inode); 137 extern int dentry_needs_remove_privs(struct dentry *dentry); 138 139 extern bool __atime_needs_update(const struct path *, struct inode *, bool); 140 static inline bool atime_needs_update_rcu(const struct path *path, 141 struct inode *inode) 142 { 143 return __atime_needs_update(path, inode, true); 144 } 145 146 /* 147 * fs-writeback.c 148 */ 149 extern void inode_io_list_del(struct inode *inode); 150 151 extern long get_nr_dirty_inodes(void); 152 extern int invalidate_inodes(struct super_block *, bool); 153 154 /* 155 * dcache.c 156 */ 157 extern struct dentry *__d_alloc(struct super_block *, const struct qstr *); 158 extern int d_set_mounted(struct dentry *dentry); 159 extern long prune_dcache_sb(struct super_block *sb, struct shrink_control *sc); 160 extern struct dentry *d_alloc_cursor(struct dentry *); 161 162 /* 163 * read_write.c 164 */ 165 extern int rw_verify_area(int, struct file *, const loff_t *, size_t); 166 167 /* 168 * pipe.c 169 */ 170 extern const struct file_operations pipefifo_fops; 171 172 /* 173 * fs_pin.c 174 */ 175 extern void group_pin_kill(struct hlist_head *p); 176 extern void mnt_pin_kill(struct mount *m); 177 178 /* 179 * fs/nsfs.c 180 */ 181 extern const struct dentry_operations ns_dentry_operations; 182 183 /* 184 * fs/ioctl.c 185 */ 186 extern int do_vfs_ioctl(struct file *file, unsigned int fd, unsigned int cmd, 187 unsigned long arg); 188 extern long vfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 189 190 /* 191 * iomap support: 192 */ 193 typedef loff_t (*iomap_actor_t)(struct inode *inode, loff_t pos, loff_t len, 194 void *data, struct iomap *iomap); 195 196 loff_t iomap_apply(struct inode *inode, loff_t pos, loff_t length, 197 unsigned flags, const struct iomap_ops *ops, void *data, 198 iomap_actor_t actor); 199 200 /* direct-io.c: */ 201 int sb_init_dio_done_wq(struct super_block *sb); 202