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 struct pipe_inode_info; 19 20 /* 21 * block/bdev.c 22 */ 23 #ifdef CONFIG_BLOCK 24 extern void __init bdev_cache_init(void); 25 26 void emergency_thaw_bdev(struct super_block *sb); 27 #else 28 static inline void bdev_cache_init(void) 29 { 30 } 31 static inline int emergency_thaw_bdev(struct super_block *sb) 32 { 33 return 0; 34 } 35 #endif /* CONFIG_BLOCK */ 36 37 /* 38 * buffer.c 39 */ 40 int __block_write_begin_int(struct folio *folio, loff_t pos, unsigned len, 41 get_block_t *get_block, const struct iomap *iomap); 42 43 /* 44 * char_dev.c 45 */ 46 extern void __init chrdev_init(void); 47 48 /* 49 * fs_context.c 50 */ 51 extern const struct fs_context_operations legacy_fs_context_ops; 52 extern int parse_monolithic_mount_data(struct fs_context *, void *); 53 extern void vfs_clean_context(struct fs_context *fc); 54 extern int finish_clean_context(struct fs_context *fc); 55 56 /* 57 * namei.c 58 */ 59 extern int filename_lookup(int dfd, struct filename *name, unsigned flags, 60 struct path *path, struct path *root); 61 extern int vfs_path_lookup(struct dentry *, struct vfsmount *, 62 const char *, unsigned int, struct path *); 63 int do_rmdir(int dfd, struct filename *name); 64 int do_unlinkat(int dfd, struct filename *name); 65 int may_linkat(struct user_namespace *mnt_userns, struct path *link); 66 int do_renameat2(int olddfd, struct filename *oldname, int newdfd, 67 struct filename *newname, unsigned int flags); 68 int do_mkdirat(int dfd, struct filename *name, umode_t mode); 69 int do_symlinkat(struct filename *from, int newdfd, struct filename *to); 70 int do_linkat(int olddfd, struct filename *old, int newdfd, 71 struct filename *new, int flags); 72 73 /* 74 * namespace.c 75 */ 76 extern struct vfsmount *lookup_mnt(const struct path *); 77 extern int finish_automount(struct vfsmount *, const struct path *); 78 79 extern int sb_prepare_remount_readonly(struct super_block *); 80 81 extern void __init mnt_init(void); 82 83 extern int __mnt_want_write_file(struct file *); 84 extern void __mnt_drop_write_file(struct file *); 85 86 extern void dissolve_on_fput(struct vfsmount *); 87 88 int path_mount(const char *dev_name, struct path *path, 89 const char *type_page, unsigned long flags, void *data_page); 90 int path_umount(struct path *path, int flags); 91 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 struct super_block *user_get_super(dev_t, bool excl); 109 void put_super(struct super_block *sb); 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(const struct path *, 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 extern int __close_fd_get_file(unsigned int fd, struct file **res); 129 130 long do_sys_ftruncate(unsigned int fd, loff_t length, int small); 131 int chmod_common(const struct path *path, umode_t mode); 132 int do_fchownat(int dfd, const char __user *filename, uid_t user, gid_t group, 133 int flag); 134 int chown_common(const struct path *path, uid_t user, gid_t group); 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 int dentry_needs_remove_privs(struct dentry *dentry); 142 143 /* 144 * fs-writeback.c 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 int d_set_mounted(struct dentry *dentry); 153 extern long prune_dcache_sb(struct super_block *sb, struct shrink_control *sc); 154 extern struct dentry *d_alloc_cursor(struct dentry *); 155 extern struct dentry * d_alloc_pseudo(struct super_block *, const struct qstr *); 156 extern char *simple_dname(struct dentry *, char *, int); 157 extern void dput_to_list(struct dentry *, struct list_head *); 158 extern void shrink_dentry_list(struct list_head *); 159 160 /* 161 * pipe.c 162 */ 163 extern const struct file_operations pipefifo_fops; 164 165 /* 166 * fs_pin.c 167 */ 168 extern void group_pin_kill(struct hlist_head *p); 169 extern void mnt_pin_kill(struct mount *m); 170 171 /* 172 * fs/nsfs.c 173 */ 174 extern const struct dentry_operations ns_dentry_operations; 175 176 /* direct-io.c: */ 177 int sb_init_dio_done_wq(struct super_block *sb); 178 179 /* 180 * fs/stat.c: 181 */ 182 183 int getname_statx_lookup_flags(int flags); 184 int do_statx(int dfd, struct filename *filename, unsigned int flags, 185 unsigned int mask, struct statx __user *buffer); 186 187 /* 188 * fs/splice.c: 189 */ 190 long splice_file_to_pipe(struct file *in, 191 struct pipe_inode_info *opipe, 192 loff_t *offset, 193 size_t len, unsigned int flags); 194