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 vfs_path_lookup(struct dentry *, struct vfsmount *, 64 const char *, unsigned int, struct path *); 65 long do_mknodat(int dfd, const char __user *filename, umode_t mode, 66 unsigned int dev); 67 long do_mkdirat(int dfd, const char __user *pathname, umode_t mode); 68 long do_rmdir(int dfd, const char __user *pathname); 69 long do_unlinkat(int dfd, struct filename *name); 70 long do_symlinkat(const char __user *oldname, int newdfd, 71 const char __user *newname); 72 int do_linkat(int olddfd, const char __user *oldname, int newdfd, 73 const char __user *newname, int flags); 74 75 /* 76 * namespace.c 77 */ 78 extern void *copy_mount_options(const void __user *); 79 extern char *copy_mount_string(const void __user *); 80 81 extern struct vfsmount *lookup_mnt(const struct path *); 82 extern int finish_automount(struct vfsmount *, struct path *); 83 84 extern int sb_prepare_remount_readonly(struct super_block *); 85 86 extern void __init mnt_init(void); 87 88 extern int __mnt_want_write_file(struct file *); 89 extern void __mnt_drop_write_file(struct file *); 90 91 extern void dissolve_on_fput(struct vfsmount *); 92 /* 93 * fs_struct.c 94 */ 95 extern void chroot_fs_refs(const struct path *, const struct path *); 96 97 /* 98 * file_table.c 99 */ 100 extern struct file *alloc_empty_file(int, const struct cred *); 101 extern struct file *alloc_empty_file_noaccount(int, const struct cred *); 102 103 /* 104 * super.c 105 */ 106 extern int reconfigure_super(struct fs_context *); 107 extern bool trylock_super(struct super_block *sb); 108 extern struct super_block *user_get_super(dev_t); 109 extern bool mount_capable(struct fs_context *); 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 extern struct open_how build_open_how(int flags, umode_t mode); 126 extern int build_open_flags(const struct open_how *how, struct open_flags *op); 127 128 long do_sys_ftruncate(unsigned int fd, loff_t length, int small); 129 int do_fchmodat(int dfd, const char __user *filename, umode_t mode); 130 int do_fchownat(int dfd, const char __user *filename, uid_t user, gid_t group, 131 int flag); 132 133 extern int vfs_open(const struct path *, struct file *); 134 135 /* 136 * inode.c 137 */ 138 extern long prune_icache_sb(struct super_block *sb, struct shrink_control *sc); 139 extern void inode_add_lru(struct inode *inode); 140 extern int dentry_needs_remove_privs(struct dentry *dentry); 141 142 /* 143 * fs-writeback.c 144 */ 145 extern long get_nr_dirty_inodes(void); 146 extern int invalidate_inodes(struct super_block *, bool); 147 148 /* 149 * dcache.c 150 */ 151 extern int d_set_mounted(struct dentry *dentry); 152 extern long prune_dcache_sb(struct super_block *sb, struct shrink_control *sc); 153 extern struct dentry *d_alloc_cursor(struct dentry *); 154 extern struct dentry * d_alloc_pseudo(struct super_block *, const struct qstr *); 155 extern char *simple_dname(struct dentry *, char *, int); 156 extern void dput_to_list(struct dentry *, struct list_head *); 157 extern void shrink_dentry_list(struct list_head *); 158 159 /* 160 * read_write.c 161 */ 162 extern int rw_verify_area(int, struct file *, const loff_t *, size_t); 163 164 /* 165 * pipe.c 166 */ 167 extern const struct file_operations pipefifo_fops; 168 169 /* 170 * fs_pin.c 171 */ 172 extern void group_pin_kill(struct hlist_head *p); 173 extern void mnt_pin_kill(struct mount *m); 174 175 /* 176 * fs/nsfs.c 177 */ 178 extern const struct dentry_operations ns_dentry_operations; 179 180 /* direct-io.c: */ 181 int sb_init_dio_done_wq(struct super_block *sb); 182 183 /* 184 * fs/stat.c: 185 */ 186 int do_statx(int dfd, const char __user *filename, unsigned flags, 187 unsigned int mask, struct statx __user *buffer); 188