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 44 /* 45 * char_dev.c 46 */ 47 extern void __init chrdev_init(void); 48 49 /* 50 * fs_context.c 51 */ 52 extern const struct fs_context_operations legacy_fs_context_ops; 53 extern int parse_monolithic_mount_data(struct fs_context *, void *); 54 extern void fc_drop_locked(struct fs_context *); 55 extern void vfs_clean_context(struct fs_context *fc); 56 extern int finish_clean_context(struct fs_context *fc); 57 58 /* 59 * namei.c 60 */ 61 extern int filename_lookup(int dfd, struct filename *name, unsigned flags, 62 struct path *path, struct path *root); 63 extern int user_path_mountpoint_at(int, const char __user *, unsigned int, struct path *); 64 extern int vfs_path_lookup(struct dentry *, struct vfsmount *, 65 const char *, unsigned int, struct path *); 66 long do_mknodat(int dfd, const char __user *filename, umode_t mode, 67 unsigned int dev); 68 long do_mkdirat(int dfd, const char __user *pathname, umode_t mode); 69 long do_rmdir(int dfd, const char __user *pathname); 70 long do_unlinkat(int dfd, struct filename *name); 71 long do_symlinkat(const char __user *oldname, int newdfd, 72 const char __user *newname); 73 int do_linkat(int olddfd, const char __user *oldname, int newdfd, 74 const char __user *newname, int flags); 75 76 /* 77 * namespace.c 78 */ 79 extern void *copy_mount_options(const void __user *); 80 extern char *copy_mount_string(const void __user *); 81 82 extern struct vfsmount *lookup_mnt(const struct path *); 83 extern int finish_automount(struct vfsmount *, struct path *); 84 85 extern int sb_prepare_remount_readonly(struct super_block *); 86 87 extern void __init mnt_init(void); 88 89 extern int __mnt_want_write_file(struct file *); 90 extern void __mnt_drop_write_file(struct file *); 91 92 extern void dissolve_on_fput(struct vfsmount *); 93 /* 94 * fs_struct.c 95 */ 96 extern void chroot_fs_refs(const struct path *, const struct path *); 97 98 /* 99 * file_table.c 100 */ 101 extern struct file *alloc_empty_file(int, const struct cred *); 102 extern struct file *alloc_empty_file_noaccount(int, const struct cred *); 103 104 /* 105 * super.c 106 */ 107 extern int reconfigure_super(struct fs_context *); 108 extern bool trylock_super(struct super_block *sb); 109 extern struct super_block *user_get_super(dev_t); 110 111 /* 112 * open.c 113 */ 114 struct open_flags { 115 int open_flag; 116 umode_t mode; 117 int acc_mode; 118 int intent; 119 int lookup_flags; 120 }; 121 extern struct file *do_filp_open(int dfd, struct filename *pathname, 122 const struct open_flags *op); 123 extern struct file *do_file_open_root(struct dentry *, struct vfsmount *, 124 const char *, const struct open_flags *); 125 126 long do_sys_ftruncate(unsigned int fd, loff_t length, int small); 127 long do_faccessat(int dfd, const char __user *filename, int mode); 128 int do_fchmodat(int dfd, const char __user *filename, umode_t mode); 129 int do_fchownat(int dfd, const char __user *filename, uid_t user, gid_t group, 130 int flag); 131 132 extern int vfs_open(const struct path *, struct file *); 133 134 /* 135 * inode.c 136 */ 137 extern long prune_icache_sb(struct super_block *sb, struct shrink_control *sc); 138 extern void inode_add_lru(struct inode *inode); 139 extern int dentry_needs_remove_privs(struct dentry *dentry); 140 141 /* 142 * fs-writeback.c 143 */ 144 extern void inode_io_list_del(struct inode *inode); 145 146 extern long get_nr_dirty_inodes(void); 147 extern int invalidate_inodes(struct super_block *, bool); 148 149 /* 150 * dcache.c 151 */ 152 extern struct dentry *__d_alloc(struct super_block *, const struct qstr *); 153 extern int d_set_mounted(struct dentry *dentry); 154 extern long prune_dcache_sb(struct super_block *sb, struct shrink_control *sc); 155 extern struct dentry *d_alloc_cursor(struct dentry *); 156 extern struct dentry * d_alloc_pseudo(struct super_block *, const struct qstr *); 157 158 /* 159 * read_write.c 160 */ 161 extern int rw_verify_area(int, struct file *, const loff_t *, size_t); 162 163 /* 164 * pipe.c 165 */ 166 extern const struct file_operations pipefifo_fops; 167 168 /* 169 * fs_pin.c 170 */ 171 extern void group_pin_kill(struct hlist_head *p); 172 extern void mnt_pin_kill(struct mount *m); 173 174 /* 175 * fs/nsfs.c 176 */ 177 extern const struct dentry_operations ns_dentry_operations; 178 179 /* 180 * fs/ioctl.c 181 */ 182 extern int do_vfs_ioctl(struct file *file, unsigned int fd, unsigned int cmd, 183 unsigned long arg); 184 185 /* 186 * iomap support: 187 */ 188 typedef loff_t (*iomap_actor_t)(struct inode *inode, loff_t pos, loff_t len, 189 void *data, struct iomap *iomap); 190 191 loff_t iomap_apply(struct inode *inode, loff_t pos, loff_t length, 192 unsigned flags, const struct iomap_ops *ops, void *data, 193 iomap_actor_t actor); 194 195 /* direct-io.c: */ 196 int sb_init_dio_done_wq(struct super_block *sb); 197