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 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 extern bool mount_capable(struct fs_context *); 111 112 /* 113 * open.c 114 */ 115 struct open_flags { 116 int open_flag; 117 umode_t mode; 118 int acc_mode; 119 int intent; 120 int lookup_flags; 121 }; 122 extern struct file *do_filp_open(int dfd, struct filename *pathname, 123 const struct open_flags *op); 124 extern struct file *do_file_open_root(struct dentry *, struct vfsmount *, 125 const char *, const struct open_flags *); 126 extern struct open_how build_open_how(int flags, umode_t mode); 127 extern int build_open_flags(const struct open_how *how, struct open_flags *op); 128 129 long do_sys_ftruncate(unsigned int fd, loff_t length, int small); 130 long do_faccessat(int dfd, const char __user *filename, int mode); 131 int do_fchmodat(int dfd, const char __user *filename, umode_t mode); 132 int do_fchownat(int dfd, const char __user *filename, uid_t user, gid_t group, 133 int flag); 134 135 extern int vfs_open(const struct path *, struct file *); 136 137 /* 138 * inode.c 139 */ 140 extern long prune_icache_sb(struct super_block *sb, struct shrink_control *sc); 141 extern void inode_add_lru(struct inode *inode); 142 extern int dentry_needs_remove_privs(struct dentry *dentry); 143 144 /* 145 * fs-writeback.c 146 */ 147 extern void inode_io_list_del(struct inode *inode); 148 149 extern long get_nr_dirty_inodes(void); 150 extern int invalidate_inodes(struct super_block *, bool); 151 152 /* 153 * dcache.c 154 */ 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 extern char *simple_dname(struct dentry *, char *, int); 160 extern void dput_to_list(struct dentry *, struct list_head *); 161 extern void shrink_dentry_list(struct list_head *); 162 163 /* 164 * read_write.c 165 */ 166 extern int rw_verify_area(int, struct file *, const loff_t *, size_t); 167 168 /* 169 * pipe.c 170 */ 171 extern const struct file_operations pipefifo_fops; 172 173 /* 174 * fs_pin.c 175 */ 176 extern void group_pin_kill(struct hlist_head *p); 177 extern void mnt_pin_kill(struct mount *m); 178 179 /* 180 * fs/nsfs.c 181 */ 182 extern const struct dentry_operations ns_dentry_operations; 183 184 /* direct-io.c: */ 185 int sb_init_dio_done_wq(struct super_block *sb); 186 187 /* 188 * fs/stat.c: 189 */ 190 unsigned vfs_stat_set_lookup_flags(unsigned *lookup_flags, int flags); 191 int cp_statx(const struct kstat *stat, struct statx __user *buffer); 192