1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* fs/ internal definitions 3 * 4 * Copyright (C) 2006 Red Hat, Inc. All Rights Reserved. 5 * Written by David Howells (dhowells@redhat.com) 6 */ 7 8 struct super_block; 9 struct file_system_type; 10 struct iomap; 11 struct iomap_ops; 12 struct linux_binprm; 13 struct path; 14 struct mount; 15 struct shrink_control; 16 struct fs_context; 17 struct user_namespace; 18 19 /* 20 * block_dev.c 21 */ 22 #ifdef CONFIG_BLOCK 23 extern void __init bdev_cache_init(void); 24 25 extern int __sync_blockdev(struct block_device *bdev, int wait); 26 27 #else 28 static inline void bdev_cache_init(void) 29 { 30 } 31 32 static inline int __sync_blockdev(struct block_device *bdev, int wait) 33 { 34 return 0; 35 } 36 #endif 37 38 /* 39 * buffer.c 40 */ 41 extern void guard_bio_eod(int rw, struct bio *bio); 42 extern int __block_write_begin_int(struct page *page, loff_t pos, unsigned len, 43 get_block_t *get_block, struct iomap *iomap); 44 45 /* 46 * char_dev.c 47 */ 48 extern void __init chrdev_init(void); 49 50 /* 51 * fs_context.c 52 */ 53 extern const struct fs_context_operations legacy_fs_context_ops; 54 extern int parse_monolithic_mount_data(struct fs_context *, void *); 55 extern void fc_drop_locked(struct fs_context *); 56 extern void vfs_clean_context(struct fs_context *fc); 57 extern int finish_clean_context(struct fs_context *fc); 58 59 /* 60 * namei.c 61 */ 62 extern int filename_lookup(int dfd, struct filename *name, unsigned flags, 63 struct path *path, struct path *root); 64 extern int user_path_mountpoint_at(int, const char __user *, unsigned int, struct path *); 65 extern int vfs_path_lookup(struct dentry *, struct vfsmount *, 66 const char *, unsigned int, struct path *); 67 long do_mknodat(int dfd, const char __user *filename, umode_t mode, 68 unsigned int dev); 69 long do_mkdirat(int dfd, const char __user *pathname, umode_t mode); 70 long do_rmdir(int dfd, const char __user *pathname); 71 long do_unlinkat(int dfd, struct filename *name); 72 long do_symlinkat(const char __user *oldname, int newdfd, 73 const char __user *newname); 74 int do_linkat(int olddfd, const char __user *oldname, int newdfd, 75 const char __user *newname, int flags); 76 77 /* 78 * namespace.c 79 */ 80 extern void *copy_mount_options(const void __user *); 81 extern char *copy_mount_string(const void __user *); 82 83 extern struct vfsmount *lookup_mnt(const struct path *); 84 extern int finish_automount(struct vfsmount *, struct path *); 85 86 extern int sb_prepare_remount_readonly(struct super_block *); 87 88 extern void __init mnt_init(void); 89 90 extern int __mnt_want_write_file(struct file *); 91 extern void __mnt_drop_write_file(struct file *); 92 93 extern void dissolve_on_fput(struct vfsmount *); 94 /* 95 * fs_struct.c 96 */ 97 extern void chroot_fs_refs(const struct path *, const struct path *); 98 99 /* 100 * file_table.c 101 */ 102 extern struct file *alloc_empty_file(int, const struct cred *); 103 extern struct file *alloc_empty_file_noaccount(int, const struct cred *); 104 105 /* 106 * super.c 107 */ 108 extern int reconfigure_super(struct fs_context *); 109 extern bool trylock_super(struct super_block *sb); 110 extern struct super_block *user_get_super(dev_t); 111 extern bool mount_capable(struct fs_context *); 112 113 /* 114 * open.c 115 */ 116 struct open_flags { 117 int open_flag; 118 umode_t mode; 119 int acc_mode; 120 int intent; 121 int lookup_flags; 122 }; 123 extern struct file *do_filp_open(int dfd, struct filename *pathname, 124 const struct open_flags *op); 125 extern struct file *do_file_open_root(struct dentry *, struct vfsmount *, 126 const char *, const struct open_flags *); 127 128 long do_sys_ftruncate(unsigned int fd, loff_t length, int small); 129 long do_faccessat(int dfd, const char __user *filename, int mode); 130 int do_fchmodat(int dfd, const char __user *filename, umode_t mode); 131 int do_fchownat(int dfd, const char __user *filename, uid_t user, gid_t group, 132 int flag); 133 134 extern int vfs_open(const struct path *, struct file *); 135 136 /* 137 * inode.c 138 */ 139 extern long prune_icache_sb(struct super_block *sb, struct shrink_control *sc); 140 extern void inode_add_lru(struct inode *inode); 141 extern int dentry_needs_remove_privs(struct dentry *dentry); 142 143 /* 144 * fs-writeback.c 145 */ 146 extern void inode_io_list_del(struct inode *inode); 147 148 extern long get_nr_dirty_inodes(void); 149 extern int invalidate_inodes(struct super_block *, bool); 150 151 /* 152 * dcache.c 153 */ 154 extern int d_set_mounted(struct dentry *dentry); 155 extern long prune_dcache_sb(struct super_block *sb, struct shrink_control *sc); 156 extern struct dentry *d_alloc_cursor(struct dentry *); 157 extern struct dentry * d_alloc_pseudo(struct super_block *, const struct qstr *); 158 extern char *simple_dname(struct dentry *, char *, int); 159 extern void dput_to_list(struct dentry *, struct list_head *); 160 extern void shrink_dentry_list(struct list_head *); 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); 188 189 /* direct-io.c: */ 190 int sb_init_dio_done_wq(struct super_block *sb); 191