tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
8struct super_block;
9struct file_system_type;
10struct iomap;
11struct iomap_ops;
12struct linux_binprm;
13struct path;
14struct mount;
15struct shrink_control;
16struct fs_context;
17struct user_namespace;
18struct pipe_inode_info;
19
20/*
21 * block/bdev.c
22 */
23#ifdef CONFIG_BLOCK
24extern void __init bdev_cache_init(void);
25
26void emergency_thaw_bdev(struct super_block *sb);
27#else
28static inline void bdev_cache_init(void)
29{
30}
31static inline int emergency_thaw_bdev(struct super_block *sb)
32{
33 return 0;
34}
35#endif /* CONFIG_BLOCK */
36
37/*
38 * buffer.c
39 */
40int __block_write_begin_int(struct page *page, loff_t pos, unsigned len,
41 get_block_t *get_block, const struct iomap *iomap);
42
43/*
44 * char_dev.c
45 */
46extern void __init chrdev_init(void);
47
48/*
49 * fs_context.c
50 */
51extern const struct fs_context_operations legacy_fs_context_ops;
52extern int parse_monolithic_mount_data(struct fs_context *, void *);
53extern void vfs_clean_context(struct fs_context *fc);
54extern int finish_clean_context(struct fs_context *fc);
55
56/*
57 * namei.c
58 */
59extern int filename_lookup(int dfd, struct filename *name, unsigned flags,
60 struct path *path, struct path *root);
61extern int vfs_path_lookup(struct dentry *, struct vfsmount *,
62 const char *, unsigned int, struct path *);
63int do_rmdir(int dfd, struct filename *name);
64int do_unlinkat(int dfd, struct filename *name);
65int may_linkat(struct user_namespace *mnt_userns, struct path *link);
66int do_renameat2(int olddfd, struct filename *oldname, int newdfd,
67 struct filename *newname, unsigned int flags);
68int do_mkdirat(int dfd, struct filename *name, umode_t mode);
69int do_symlinkat(struct filename *from, int newdfd, struct filename *to);
70int do_linkat(int olddfd, struct filename *old, int newdfd,
71 struct filename *new, int flags);
72
73/*
74 * namespace.c
75 */
76extern struct vfsmount *lookup_mnt(const struct path *);
77extern int finish_automount(struct vfsmount *, struct path *);
78
79extern int sb_prepare_remount_readonly(struct super_block *);
80
81extern void __init mnt_init(void);
82
83extern int __mnt_want_write_file(struct file *);
84extern void __mnt_drop_write_file(struct file *);
85
86extern void dissolve_on_fput(struct vfsmount *);
87
88int path_mount(const char *dev_name, struct path *path,
89 const char *type_page, unsigned long flags, void *data_page);
90int path_umount(struct path *path, int flags);
91
92/*
93 * fs_struct.c
94 */
95extern void chroot_fs_refs(const struct path *, const struct path *);
96
97/*
98 * file_table.c
99 */
100extern struct file *alloc_empty_file(int, const struct cred *);
101extern struct file *alloc_empty_file_noaccount(int, const struct cred *);
102
103/*
104 * super.c
105 */
106extern int reconfigure_super(struct fs_context *);
107extern bool trylock_super(struct super_block *sb);
108struct super_block *user_get_super(dev_t, bool excl);
109void put_super(struct super_block *sb);
110extern bool mount_capable(struct fs_context *);
111
112/*
113 * open.c
114 */
115struct open_flags {
116 int open_flag;
117 umode_t mode;
118 int acc_mode;
119 int intent;
120 int lookup_flags;
121};
122extern struct file *do_filp_open(int dfd, struct filename *pathname,
123 const struct open_flags *op);
124extern struct file *do_file_open_root(const struct path *,
125 const char *, const struct open_flags *);
126extern struct open_how build_open_how(int flags, umode_t mode);
127extern int build_open_flags(const struct open_how *how, struct open_flags *op);
128extern int __close_fd_get_file(unsigned int fd, struct file **res);
129
130long do_sys_ftruncate(unsigned int fd, loff_t length, int small);
131int chmod_common(const struct path *path, umode_t mode);
132int do_fchownat(int dfd, const char __user *filename, uid_t user, gid_t group,
133 int flag);
134int chown_common(const struct path *path, uid_t user, gid_t group);
135extern int vfs_open(const struct path *, struct file *);
136
137/*
138 * inode.c
139 */
140extern long prune_icache_sb(struct super_block *sb, struct shrink_control *sc);
141extern int dentry_needs_remove_privs(struct dentry *dentry);
142
143/*
144 * fs-writeback.c
145 */
146extern long get_nr_dirty_inodes(void);
147extern int invalidate_inodes(struct super_block *, bool);
148
149/*
150 * dcache.c
151 */
152extern int d_set_mounted(struct dentry *dentry);
153extern long prune_dcache_sb(struct super_block *sb, struct shrink_control *sc);
154extern struct dentry *d_alloc_cursor(struct dentry *);
155extern struct dentry * d_alloc_pseudo(struct super_block *, const struct qstr *);
156extern char *simple_dname(struct dentry *, char *, int);
157extern void dput_to_list(struct dentry *, struct list_head *);
158extern void shrink_dentry_list(struct list_head *);
159
160/*
161 * read_write.c
162 */
163extern int rw_verify_area(int, struct file *, const loff_t *, size_t);
164
165/*
166 * pipe.c
167 */
168extern const struct file_operations pipefifo_fops;
169
170/*
171 * fs_pin.c
172 */
173extern void group_pin_kill(struct hlist_head *p);
174extern void mnt_pin_kill(struct mount *m);
175
176/*
177 * fs/nsfs.c
178 */
179extern const struct dentry_operations ns_dentry_operations;
180
181/* direct-io.c: */
182int sb_init_dio_done_wq(struct super_block *sb);
183
184/*
185 * fs/stat.c:
186 */
187int do_statx(int dfd, const char __user *filename, unsigned flags,
188 unsigned int mask, struct statx __user *buffer);
189
190/*
191 * fs/splice.c:
192 */
193long splice_file_to_pipe(struct file *in,
194 struct pipe_inode_info *opipe,
195 loff_t *offset,
196 size_t len, unsigned int flags);