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 struct fs_context; 21 22 /* 23 * block_dev.c 24 */ 25 #ifdef CONFIG_BLOCK 26 extern void __init bdev_cache_init(void); 27 28 extern int __sync_blockdev(struct block_device *bdev, int wait); 29 30 #else 31 static inline void bdev_cache_init(void) 32 { 33 } 34 35 static inline int __sync_blockdev(struct block_device *bdev, int wait) 36 { 37 return 0; 38 } 39 #endif 40 41 /* 42 * buffer.c 43 */ 44 extern void guard_bio_eod(int rw, struct bio *bio); 45 extern int __block_write_begin_int(struct page *page, loff_t pos, unsigned len, 46 get_block_t *get_block, struct iomap *iomap); 47 int __generic_write_end(struct inode *inode, loff_t pos, unsigned copied, 48 struct page *page); 49 50 /* 51 * char_dev.c 52 */ 53 extern void __init chrdev_init(void); 54 55 /* 56 * fs_context.c 57 */ 58 extern int parse_monolithic_mount_data(struct fs_context *, void *); 59 extern void fc_drop_locked(struct fs_context *); 60 61 /* 62 * namei.c 63 */ 64 extern int filename_lookup(int dfd, struct filename *name, unsigned flags, 65 struct path *path, struct path *root); 66 extern int user_path_mountpoint_at(int, const char __user *, unsigned int, struct path *); 67 extern int vfs_path_lookup(struct dentry *, struct vfsmount *, 68 const char *, unsigned int, struct path *); 69 long do_mknodat(int dfd, const char __user *filename, umode_t mode, 70 unsigned int dev); 71 long do_mkdirat(int dfd, const char __user *pathname, umode_t mode); 72 long do_rmdir(int dfd, const char __user *pathname); 73 long do_unlinkat(int dfd, struct filename *name); 74 long do_symlinkat(const char __user *oldname, int newdfd, 75 const char __user *newname); 76 int do_linkat(int olddfd, const char __user *oldname, int newdfd, 77 const char __user *newname, int flags); 78 79 /* 80 * namespace.c 81 */ 82 extern void *copy_mount_options(const void __user *); 83 extern char *copy_mount_string(const void __user *); 84 85 extern struct vfsmount *lookup_mnt(const struct path *); 86 extern int finish_automount(struct vfsmount *, struct path *); 87 88 extern int sb_prepare_remount_readonly(struct super_block *); 89 90 extern void __init mnt_init(void); 91 92 extern int __mnt_want_write(struct vfsmount *); 93 extern int __mnt_want_write_file(struct file *); 94 extern void __mnt_drop_write(struct vfsmount *); 95 extern void __mnt_drop_write_file(struct file *); 96 97 /* 98 * fs_struct.c 99 */ 100 extern void chroot_fs_refs(const struct path *, const struct path *); 101 102 /* 103 * file_table.c 104 */ 105 extern struct file *alloc_empty_file(int, const struct cred *); 106 extern struct file *alloc_empty_file_noaccount(int, const struct cred *); 107 108 /* 109 * super.c 110 */ 111 extern int reconfigure_super(struct fs_context *); 112 extern bool trylock_super(struct super_block *sb); 113 extern struct super_block *user_get_super(dev_t); 114 115 /* 116 * open.c 117 */ 118 struct open_flags { 119 int open_flag; 120 umode_t mode; 121 int acc_mode; 122 int intent; 123 int lookup_flags; 124 }; 125 extern struct file *do_filp_open(int dfd, struct filename *pathname, 126 const struct open_flags *op); 127 extern struct file *do_file_open_root(struct dentry *, struct vfsmount *, 128 const char *, const struct open_flags *); 129 130 long do_sys_ftruncate(unsigned int fd, loff_t length, int small); 131 long do_faccessat(int dfd, const char __user *filename, int mode); 132 int do_fchmodat(int dfd, const char __user *filename, umode_t mode); 133 int do_fchownat(int dfd, const char __user *filename, uid_t user, gid_t group, 134 int flag); 135 136 extern int vfs_open(const struct path *, struct file *); 137 138 /* 139 * inode.c 140 */ 141 extern long prune_icache_sb(struct super_block *sb, struct shrink_control *sc); 142 extern void inode_add_lru(struct inode *inode); 143 extern int dentry_needs_remove_privs(struct dentry *dentry); 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); 187 188 /* 189 * iomap support: 190 */ 191 typedef loff_t (*iomap_actor_t)(struct inode *inode, loff_t pos, loff_t len, 192 void *data, struct iomap *iomap); 193 194 loff_t iomap_apply(struct inode *inode, loff_t pos, loff_t length, 195 unsigned flags, const struct iomap_ops *ops, void *data, 196 iomap_actor_t actor); 197 198 /* direct-io.c: */ 199 int sb_init_dio_done_wq(struct super_block *sb); 200