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 folio *folio, 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 *, const 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 *);
87extern bool may_mount(void);
88
89int path_mount(const char *dev_name, struct path *path,
90 const char *type_page, unsigned long flags, void *data_page);
91int path_umount(struct path *path, int flags);
92
93/*
94 * fs_struct.c
95 */
96extern void chroot_fs_refs(const struct path *, const struct path *);
97
98/*
99 * file_table.c
100 */
101extern struct file *alloc_empty_file(int, const struct cred *);
102extern struct file *alloc_empty_file_noaccount(int, const struct cred *);
103
104/*
105 * super.c
106 */
107extern int reconfigure_super(struct fs_context *);
108extern bool trylock_super(struct super_block *sb);
109struct super_block *user_get_super(dev_t, bool excl);
110void put_super(struct super_block *sb);
111extern bool mount_capable(struct fs_context *);
112
113/*
114 * open.c
115 */
116struct open_flags {
117 int open_flag;
118 umode_t mode;
119 int acc_mode;
120 int intent;
121 int lookup_flags;
122};
123extern struct file *do_filp_open(int dfd, struct filename *pathname,
124 const struct open_flags *op);
125extern struct file *do_file_open_root(const struct path *,
126 const char *, const struct open_flags *);
127extern struct open_how build_open_how(int flags, umode_t mode);
128extern int build_open_flags(const struct open_how *how, struct open_flags *op);
129extern struct file *__close_fd_get_file(unsigned int fd);
130
131long do_sys_ftruncate(unsigned int fd, loff_t length, int small);
132int chmod_common(const struct path *path, umode_t mode);
133int do_fchownat(int dfd, const char __user *filename, uid_t user, gid_t group,
134 int flag);
135int chown_common(const struct path *path, uid_t user, gid_t group);
136extern int vfs_open(const struct path *, struct file *);
137
138/*
139 * inode.c
140 */
141extern long prune_icache_sb(struct super_block *sb, struct shrink_control *sc);
142extern int dentry_needs_remove_privs(struct dentry *dentry);
143
144/*
145 * fs-writeback.c
146 */
147extern long get_nr_dirty_inodes(void);
148extern int invalidate_inodes(struct super_block *, bool);
149
150/*
151 * dcache.c
152 */
153extern int d_set_mounted(struct dentry *dentry);
154extern long prune_dcache_sb(struct super_block *sb, struct shrink_control *sc);
155extern struct dentry *d_alloc_cursor(struct dentry *);
156extern struct dentry * d_alloc_pseudo(struct super_block *, const struct qstr *);
157extern char *simple_dname(struct dentry *, char *, int);
158extern void dput_to_list(struct dentry *, struct list_head *);
159extern void shrink_dentry_list(struct list_head *);
160
161/*
162 * pipe.c
163 */
164extern const struct file_operations pipefifo_fops;
165
166/*
167 * fs_pin.c
168 */
169extern void group_pin_kill(struct hlist_head *p);
170extern void mnt_pin_kill(struct mount *m);
171
172/*
173 * fs/nsfs.c
174 */
175extern const struct dentry_operations ns_dentry_operations;
176
177/* direct-io.c: */
178int sb_init_dio_done_wq(struct super_block *sb);
179
180/*
181 * fs/stat.c:
182 */
183
184int getname_statx_lookup_flags(int flags);
185int do_statx(int dfd, struct filename *filename, unsigned int flags,
186 unsigned int mask, struct statx __user *buffer);
187
188/*
189 * fs/splice.c:
190 */
191long splice_file_to_pipe(struct file *in,
192 struct pipe_inode_info *opipe,
193 loff_t *offset,
194 size_t len, unsigned int flags);
195
196/*
197 * fs/xattr.c:
198 */
199struct xattr_name {
200 char name[XATTR_NAME_MAX + 1];
201};
202
203struct xattr_ctx {
204 /* Value of attribute */
205 union {
206 const void __user *cvalue;
207 void __user *value;
208 };
209 void *kvalue;
210 size_t size;
211 /* Attribute name */
212 struct xattr_name *kname;
213 unsigned int flags;
214};
215
216
217ssize_t do_getxattr(struct user_namespace *mnt_userns,
218 struct dentry *d,
219 struct xattr_ctx *ctx);
220
221int setxattr_copy(const char __user *name, struct xattr_ctx *ctx);
222int do_setxattr(struct user_namespace *mnt_userns, struct dentry *dentry,
223 struct xattr_ctx *ctx);