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 int __generic_write_end(struct inode *inode, loff_t pos, unsigned copied, 47 struct page *page); 48 49 /* 50 * char_dev.c 51 */ 52 extern void __init chrdev_init(void); 53 54 /* 55 * namei.c 56 */ 57 extern int user_path_mountpoint_at(int, const char __user *, unsigned int, struct path *); 58 extern int vfs_path_lookup(struct dentry *, struct vfsmount *, 59 const char *, unsigned int, struct path *); 60 long do_mknodat(int dfd, const char __user *filename, umode_t mode, 61 unsigned int dev); 62 long do_mkdirat(int dfd, const char __user *pathname, umode_t mode); 63 long do_rmdir(int dfd, const char __user *pathname); 64 long do_unlinkat(int dfd, struct filename *name); 65 long do_symlinkat(const char __user *oldname, int newdfd, 66 const char __user *newname); 67 int do_linkat(int olddfd, const char __user *oldname, int newdfd, 68 const char __user *newname, int flags); 69 70 /* 71 * namespace.c 72 */ 73 extern void *copy_mount_options(const void __user *); 74 extern char *copy_mount_string(const void __user *); 75 76 extern struct vfsmount *lookup_mnt(const struct path *); 77 extern int finish_automount(struct vfsmount *, struct path *); 78 79 extern int sb_prepare_remount_readonly(struct super_block *); 80 81 extern void __init mnt_init(void); 82 83 extern int __mnt_want_write(struct vfsmount *); 84 extern int __mnt_want_write_file(struct file *); 85 extern void __mnt_drop_write(struct vfsmount *); 86 extern void __mnt_drop_write_file(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 *alloc_empty_file(int, const struct cred *); 97 extern struct file *alloc_empty_file_noaccount(int, const struct cred *); 98 99 /* 100 * super.c 101 */ 102 extern int do_remount_sb(struct super_block *, int, void *, int); 103 extern bool trylock_super(struct super_block *sb); 104 extern struct dentry *mount_fs(struct file_system_type *, 105 int, const char *, void *); 106 extern struct super_block *user_get_super(dev_t); 107 108 /* 109 * open.c 110 */ 111 struct open_flags { 112 int open_flag; 113 umode_t mode; 114 int acc_mode; 115 int intent; 116 int lookup_flags; 117 }; 118 extern struct file *do_filp_open(int dfd, struct filename *pathname, 119 const struct open_flags *op); 120 extern struct file *do_file_open_root(struct dentry *, struct vfsmount *, 121 const char *, const struct open_flags *); 122 123 long do_sys_ftruncate(unsigned int fd, loff_t length, int small); 124 long do_faccessat(int dfd, const char __user *filename, int mode); 125 int do_fchmodat(int dfd, const char __user *filename, umode_t mode); 126 int do_fchownat(int dfd, const char __user *filename, uid_t user, gid_t group, 127 int flag); 128 129 extern int vfs_open(const struct path *, struct file *); 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 /* 139 * fs-writeback.c 140 */ 141 extern void inode_io_list_del(struct inode *inode); 142 143 extern long get_nr_dirty_inodes(void); 144 extern int invalidate_inodes(struct super_block *, bool); 145 146 /* 147 * dcache.c 148 */ 149 extern struct dentry *__d_alloc(struct super_block *, const struct qstr *); 150 extern int d_set_mounted(struct dentry *dentry); 151 extern long prune_dcache_sb(struct super_block *sb, struct shrink_control *sc); 152 extern struct dentry *d_alloc_cursor(struct dentry *); 153 154 /* 155 * read_write.c 156 */ 157 extern int rw_verify_area(int, struct file *, const loff_t *, size_t); 158 159 /* 160 * pipe.c 161 */ 162 extern const struct file_operations pipefifo_fops; 163 164 /* 165 * fs_pin.c 166 */ 167 extern void group_pin_kill(struct hlist_head *p); 168 extern void mnt_pin_kill(struct mount *m); 169 170 /* 171 * fs/nsfs.c 172 */ 173 extern const struct dentry_operations ns_dentry_operations; 174 175 /* 176 * fs/ioctl.c 177 */ 178 extern int do_vfs_ioctl(struct file *file, unsigned int fd, unsigned int cmd, 179 unsigned long arg); 180 181 /* 182 * iomap support: 183 */ 184 typedef loff_t (*iomap_actor_t)(struct inode *inode, loff_t pos, loff_t len, 185 void *data, struct iomap *iomap); 186 187 loff_t iomap_apply(struct inode *inode, loff_t pos, loff_t length, 188 unsigned flags, const struct iomap_ops *ops, void *data, 189 iomap_actor_t actor); 190 191 /* direct-io.c: */ 192 int sb_init_dio_done_wq(struct super_block *sb); 193