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 void __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 const struct fs_context_operations legacy_fs_context_ops; 59 extern int parse_monolithic_mount_data(struct fs_context *, void *); 60 extern void fc_drop_locked(struct fs_context *); 61 extern void vfs_clean_context(struct fs_context *fc); 62 extern int finish_clean_context(struct fs_context *fc); 63 64 /* 65 * namei.c 66 */ 67 extern int filename_lookup(int dfd, struct filename *name, unsigned flags, 68 struct path *path, struct path *root); 69 extern int user_path_mountpoint_at(int, const char __user *, unsigned int, struct path *); 70 extern int vfs_path_lookup(struct dentry *, struct vfsmount *, 71 const char *, unsigned int, struct path *); 72 long do_mknodat(int dfd, const char __user *filename, umode_t mode, 73 unsigned int dev); 74 long do_mkdirat(int dfd, const char __user *pathname, umode_t mode); 75 long do_rmdir(int dfd, const char __user *pathname); 76 long do_unlinkat(int dfd, struct filename *name); 77 long do_symlinkat(const char __user *oldname, int newdfd, 78 const char __user *newname); 79 int do_linkat(int olddfd, const char __user *oldname, int newdfd, 80 const char __user *newname, int flags); 81 82 /* 83 * namespace.c 84 */ 85 extern void *copy_mount_options(const void __user *); 86 extern char *copy_mount_string(const void __user *); 87 88 extern struct vfsmount *lookup_mnt(const struct path *); 89 extern int finish_automount(struct vfsmount *, struct path *); 90 91 extern int sb_prepare_remount_readonly(struct super_block *); 92 93 extern void __init mnt_init(void); 94 95 extern int __mnt_want_write_file(struct file *); 96 extern void __mnt_drop_write_file(struct file *); 97 98 extern void dissolve_on_fput(struct vfsmount *); 99 /* 100 * fs_struct.c 101 */ 102 extern void chroot_fs_refs(const struct path *, const struct path *); 103 104 /* 105 * file_table.c 106 */ 107 extern struct file *alloc_empty_file(int, const struct cred *); 108 extern struct file *alloc_empty_file_noaccount(int, const struct cred *); 109 110 /* 111 * super.c 112 */ 113 extern int reconfigure_super(struct fs_context *); 114 extern bool trylock_super(struct super_block *sb); 115 extern struct super_block *user_get_super(dev_t); 116 117 /* 118 * open.c 119 */ 120 struct open_flags { 121 int open_flag; 122 umode_t mode; 123 int acc_mode; 124 int intent; 125 int lookup_flags; 126 }; 127 extern struct file *do_filp_open(int dfd, struct filename *pathname, 128 const struct open_flags *op); 129 extern struct file *do_file_open_root(struct dentry *, struct vfsmount *, 130 const char *, const struct open_flags *); 131 132 long do_sys_ftruncate(unsigned int fd, loff_t length, int small); 133 long do_faccessat(int dfd, const char __user *filename, int mode); 134 int do_fchmodat(int dfd, const char __user *filename, umode_t mode); 135 int do_fchownat(int dfd, const char __user *filename, uid_t user, gid_t group, 136 int flag); 137 138 extern int vfs_open(const struct path *, struct file *); 139 140 /* 141 * inode.c 142 */ 143 extern long prune_icache_sb(struct super_block *sb, struct shrink_control *sc); 144 extern void inode_add_lru(struct inode *inode); 145 extern int dentry_needs_remove_privs(struct dentry *dentry); 146 147 /* 148 * fs-writeback.c 149 */ 150 extern void inode_io_list_del(struct inode *inode); 151 152 extern long get_nr_dirty_inodes(void); 153 extern int invalidate_inodes(struct super_block *, bool); 154 155 /* 156 * dcache.c 157 */ 158 extern struct dentry *__d_alloc(struct super_block *, const struct qstr *); 159 extern int d_set_mounted(struct dentry *dentry); 160 extern long prune_dcache_sb(struct super_block *sb, struct shrink_control *sc); 161 extern struct dentry *d_alloc_cursor(struct dentry *); 162 extern struct dentry * d_alloc_pseudo(struct super_block *, const struct qstr *); 163 164 /* 165 * read_write.c 166 */ 167 extern int rw_verify_area(int, struct file *, const loff_t *, size_t); 168 169 /* 170 * pipe.c 171 */ 172 extern const struct file_operations pipefifo_fops; 173 174 /* 175 * fs_pin.c 176 */ 177 extern void group_pin_kill(struct hlist_head *p); 178 extern void mnt_pin_kill(struct mount *m); 179 180 /* 181 * fs/nsfs.c 182 */ 183 extern const struct dentry_operations ns_dentry_operations; 184 185 /* 186 * fs/ioctl.c 187 */ 188 extern int do_vfs_ioctl(struct file *file, unsigned int fd, unsigned int cmd, 189 unsigned long arg); 190 191 /* 192 * iomap support: 193 */ 194 typedef loff_t (*iomap_actor_t)(struct inode *inode, loff_t pos, loff_t len, 195 void *data, struct iomap *iomap); 196 197 loff_t iomap_apply(struct inode *inode, loff_t pos, loff_t length, 198 unsigned flags, const struct iomap_ops *ops, void *data, 199 iomap_actor_t actor); 200 201 /* direct-io.c: */ 202 int sb_init_dio_done_wq(struct super_block *sb); 203