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 18 /* 19 * block_dev.c 20 */ 21 #ifdef CONFIG_BLOCK 22 extern void __init bdev_cache_init(void); 23 24 extern int __sync_blockdev(struct block_device *bdev, int wait); 25 26 #else 27 static inline void bdev_cache_init(void) 28 { 29 } 30 31 static inline int __sync_blockdev(struct block_device *bdev, int wait) 32 { 33 return 0; 34 } 35 #endif 36 37 /* 38 * buffer.c 39 */ 40 extern void guard_bio_eod(int rw, struct bio *bio); 41 extern int __block_write_begin_int(struct page *page, loff_t pos, unsigned len, 42 get_block_t *get_block, struct iomap *iomap); 43 void __generic_write_end(struct inode *inode, loff_t pos, unsigned copied, 44 struct page *page); 45 46 /* 47 * char_dev.c 48 */ 49 extern void __init chrdev_init(void); 50 51 /* 52 * fs_context.c 53 */ 54 extern const struct fs_context_operations legacy_fs_context_ops; 55 extern int parse_monolithic_mount_data(struct fs_context *, void *); 56 extern void fc_drop_locked(struct fs_context *); 57 extern void vfs_clean_context(struct fs_context *fc); 58 extern int finish_clean_context(struct fs_context *fc); 59 60 /* 61 * namei.c 62 */ 63 extern int filename_lookup(int dfd, struct filename *name, unsigned flags, 64 struct path *path, struct path *root); 65 extern int user_path_mountpoint_at(int, const char __user *, unsigned int, struct path *); 66 extern int vfs_path_lookup(struct dentry *, struct vfsmount *, 67 const char *, unsigned int, struct path *); 68 long do_mknodat(int dfd, const char __user *filename, umode_t mode, 69 unsigned int dev); 70 long do_mkdirat(int dfd, const char __user *pathname, umode_t mode); 71 long do_rmdir(int dfd, const char __user *pathname); 72 long do_unlinkat(int dfd, struct filename *name); 73 long do_symlinkat(const char __user *oldname, int newdfd, 74 const char __user *newname); 75 int do_linkat(int olddfd, const char __user *oldname, int newdfd, 76 const char __user *newname, int flags); 77 78 /* 79 * namespace.c 80 */ 81 extern void *copy_mount_options(const void __user *); 82 extern char *copy_mount_string(const void __user *); 83 84 extern struct vfsmount *lookup_mnt(const struct path *); 85 extern int finish_automount(struct vfsmount *, struct path *); 86 87 extern int sb_prepare_remount_readonly(struct super_block *); 88 89 extern void __init mnt_init(void); 90 91 extern int __mnt_want_write_file(struct file *); 92 extern void __mnt_drop_write_file(struct file *); 93 94 extern void dissolve_on_fput(struct vfsmount *); 95 /* 96 * fs_struct.c 97 */ 98 extern void chroot_fs_refs(const struct path *, const struct path *); 99 100 /* 101 * file_table.c 102 */ 103 extern struct file *alloc_empty_file(int, const struct cred *); 104 extern struct file *alloc_empty_file_noaccount(int, const struct cred *); 105 106 /* 107 * super.c 108 */ 109 extern int reconfigure_super(struct fs_context *); 110 extern bool trylock_super(struct super_block *sb); 111 extern struct super_block *user_get_super(dev_t); 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 struct dentry *__d_alloc(struct super_block *, const struct qstr *); 155 extern int d_set_mounted(struct dentry *dentry); 156 extern long prune_dcache_sb(struct super_block *sb, struct shrink_control *sc); 157 extern struct dentry *d_alloc_cursor(struct dentry *); 158 extern struct dentry * d_alloc_pseudo(struct super_block *, const struct qstr *); 159 160 /* 161 * read_write.c 162 */ 163 extern int rw_verify_area(int, struct file *, const loff_t *, size_t); 164 165 /* 166 * pipe.c 167 */ 168 extern const struct file_operations pipefifo_fops; 169 170 /* 171 * fs_pin.c 172 */ 173 extern void group_pin_kill(struct hlist_head *p); 174 extern void mnt_pin_kill(struct mount *m); 175 176 /* 177 * fs/nsfs.c 178 */ 179 extern const struct dentry_operations ns_dentry_operations; 180 181 /* 182 * fs/ioctl.c 183 */ 184 extern int do_vfs_ioctl(struct file *file, unsigned int fd, unsigned int cmd, 185 unsigned long arg); 186 187 /* 188 * iomap support: 189 */ 190 typedef loff_t (*iomap_actor_t)(struct inode *inode, loff_t pos, loff_t len, 191 void *data, struct iomap *iomap); 192 193 loff_t iomap_apply(struct inode *inode, loff_t pos, loff_t length, 194 unsigned flags, const struct iomap_ops *ops, void *data, 195 iomap_actor_t actor); 196 197 /* direct-io.c: */ 198 int sb_init_dio_done_wq(struct super_block *sb); 199