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 void iterate_bdevs(void (*)(struct block_device *, void *), void *); 27 void emergency_thaw_bdev(struct super_block *sb); 28 void bd_forget(struct inode *inode); 29 #else 30 static inline void bdev_cache_init(void) 31 { 32 } 33 34 static inline int __sync_blockdev(struct block_device *bdev, int wait) 35 { 36 return 0; 37 } 38 static inline void iterate_bdevs(void (*f)(struct block_device *, void *), 39 void *arg) 40 { 41 } 42 static inline int emergency_thaw_bdev(struct super_block *sb) 43 { 44 return 0; 45 } 46 static inline void bd_forget(struct inode *inode) 47 { 48 } 49 #endif /* CONFIG_BLOCK */ 50 51 /* 52 * buffer.c 53 */ 54 extern int __block_write_begin_int(struct page *page, loff_t pos, unsigned len, 55 get_block_t *get_block, struct iomap *iomap); 56 57 /* 58 * char_dev.c 59 */ 60 extern void __init chrdev_init(void); 61 62 /* 63 * fs_context.c 64 */ 65 extern const struct fs_context_operations legacy_fs_context_ops; 66 extern int parse_monolithic_mount_data(struct fs_context *, void *); 67 extern void fc_drop_locked(struct fs_context *); 68 extern void vfs_clean_context(struct fs_context *fc); 69 extern int finish_clean_context(struct fs_context *fc); 70 71 /* 72 * namei.c 73 */ 74 extern int filename_lookup(int dfd, struct filename *name, unsigned flags, 75 struct path *path, struct path *root); 76 extern int vfs_path_lookup(struct dentry *, struct vfsmount *, 77 const char *, unsigned int, struct path *); 78 long do_mknodat(int dfd, const char __user *filename, umode_t mode, 79 unsigned int dev); 80 long do_mkdirat(int dfd, const char __user *pathname, umode_t mode); 81 long do_rmdir(int dfd, const char __user *pathname); 82 long do_unlinkat(int dfd, struct filename *name); 83 long do_symlinkat(const char __user *oldname, int newdfd, 84 const char __user *newname); 85 int do_linkat(int olddfd, const char __user *oldname, int newdfd, 86 const char __user *newname, int flags); 87 88 /* 89 * namespace.c 90 */ 91 extern void *copy_mount_options(const void __user *); 92 extern char *copy_mount_string(const void __user *); 93 94 extern struct vfsmount *lookup_mnt(const struct path *); 95 extern int finish_automount(struct vfsmount *, struct path *); 96 97 extern int sb_prepare_remount_readonly(struct super_block *); 98 99 extern void __init mnt_init(void); 100 101 extern int __mnt_want_write_file(struct file *); 102 extern void __mnt_drop_write_file(struct file *); 103 104 extern void dissolve_on_fput(struct vfsmount *); 105 /* 106 * fs_struct.c 107 */ 108 extern void chroot_fs_refs(const struct path *, const struct path *); 109 110 /* 111 * file_table.c 112 */ 113 extern struct file *alloc_empty_file(int, const struct cred *); 114 extern struct file *alloc_empty_file_noaccount(int, const struct cred *); 115 116 /* 117 * super.c 118 */ 119 extern int reconfigure_super(struct fs_context *); 120 extern bool trylock_super(struct super_block *sb); 121 extern struct super_block *user_get_super(dev_t); 122 extern bool mount_capable(struct fs_context *); 123 124 /* 125 * open.c 126 */ 127 struct open_flags { 128 int open_flag; 129 umode_t mode; 130 int acc_mode; 131 int intent; 132 int lookup_flags; 133 }; 134 extern struct file *do_filp_open(int dfd, struct filename *pathname, 135 const struct open_flags *op); 136 extern struct file *do_file_open_root(struct dentry *, struct vfsmount *, 137 const char *, const struct open_flags *); 138 extern struct open_how build_open_how(int flags, umode_t mode); 139 extern int build_open_flags(const struct open_how *how, struct open_flags *op); 140 141 long do_sys_ftruncate(unsigned int fd, loff_t length, int small); 142 int do_fchmodat(int dfd, const char __user *filename, umode_t mode); 143 int do_fchownat(int dfd, const char __user *filename, uid_t user, gid_t group, 144 int flag); 145 146 extern int vfs_open(const struct path *, struct file *); 147 148 /* 149 * inode.c 150 */ 151 extern long prune_icache_sb(struct super_block *sb, struct shrink_control *sc); 152 extern void inode_add_lru(struct inode *inode); 153 extern int dentry_needs_remove_privs(struct dentry *dentry); 154 155 /* 156 * fs-writeback.c 157 */ 158 extern long get_nr_dirty_inodes(void); 159 extern int invalidate_inodes(struct super_block *, bool); 160 161 /* 162 * dcache.c 163 */ 164 extern int d_set_mounted(struct dentry *dentry); 165 extern long prune_dcache_sb(struct super_block *sb, struct shrink_control *sc); 166 extern struct dentry *d_alloc_cursor(struct dentry *); 167 extern struct dentry * d_alloc_pseudo(struct super_block *, const struct qstr *); 168 extern char *simple_dname(struct dentry *, char *, int); 169 extern void dput_to_list(struct dentry *, struct list_head *); 170 extern void shrink_dentry_list(struct list_head *); 171 172 /* 173 * read_write.c 174 */ 175 extern int rw_verify_area(int, struct file *, const loff_t *, size_t); 176 177 /* 178 * pipe.c 179 */ 180 extern const struct file_operations pipefifo_fops; 181 182 /* 183 * fs_pin.c 184 */ 185 extern void group_pin_kill(struct hlist_head *p); 186 extern void mnt_pin_kill(struct mount *m); 187 188 /* 189 * fs/nsfs.c 190 */ 191 extern const struct dentry_operations ns_dentry_operations; 192 193 /* direct-io.c: */ 194 int sb_init_dio_done_wq(struct super_block *sb); 195 196 /* 197 * fs/stat.c: 198 */ 199 int do_statx(int dfd, const char __user *filename, unsigned flags, 200 unsigned int mask, struct statx __user *buffer); 201