Commit | Line | Data |
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2874c5fd | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
07f3f05c DH |
2 | /* fs/ internal definitions |
3 | * | |
4 | * Copyright (C) 2006 Red Hat, Inc. All Rights Reserved. | |
5 | * Written by David Howells (dhowells@redhat.com) | |
07f3f05c DH |
6 | */ |
7 | ||
5e6d12b2 | 8 | struct super_block; |
9d412a43 | 9 | struct file_system_type; |
ae259a9c | 10 | struct iomap; |
befb503c | 11 | struct iomap_ops; |
a6f76f23 | 12 | struct linux_binprm; |
3e93cd67 | 13 | struct path; |
c7105365 | 14 | struct mount; |
503c358c | 15 | struct shrink_control; |
9bc61ab1 | 16 | struct fs_context; |
b964bf53 | 17 | struct pipe_inode_info; |
06bbaa6d | 18 | struct iov_iter; |
3707d84c | 19 | struct mnt_idmap; |
5e6d12b2 | 20 | |
07f3f05c | 21 | /* |
0dca4462 | 22 | * block/bdev.c |
07f3f05c | 23 | */ |
9361401e | 24 | #ifdef CONFIG_BLOCK |
07f3f05c DH |
25 | extern void __init bdev_cache_init(void); |
26 | ||
3f1266f1 | 27 | void emergency_thaw_bdev(struct super_block *sb); |
9361401e | 28 | #else |
5e6d12b2 AM |
29 | static inline void bdev_cache_init(void) |
30 | { | |
31 | } | |
3f1266f1 CH |
32 | static inline int emergency_thaw_bdev(struct super_block *sb) |
33 | { | |
34 | return 0; | |
35 | } | |
3f1266f1 | 36 | #endif /* CONFIG_BLOCK */ |
7b0de42d | 37 | |
4db96b71 AM |
38 | /* |
39 | * buffer.c | |
40 | */ | |
d1bd0b4e | 41 | int __block_write_begin_int(struct folio *folio, loff_t pos, unsigned len, |
6d49cc85 | 42 | get_block_t *get_block, const struct iomap *iomap); |
4db96b71 | 43 | |
07f3f05c DH |
44 | /* |
45 | * char_dev.c | |
46 | */ | |
47 | extern void __init chrdev_init(void); | |
48 | ||
9bc61ab1 DH |
49 | /* |
50 | * fs_context.c | |
51 | */ | |
ecdab150 | 52 | extern const struct fs_context_operations legacy_fs_context_ops; |
9bc61ab1 | 53 | extern int parse_monolithic_mount_data(struct fs_context *, void *); |
ecdab150 DH |
54 | extern void vfs_clean_context(struct fs_context *fc); |
55 | extern int finish_clean_context(struct fs_context *fc); | |
9bc61ab1 | 56 | |
0bdaea90 DH |
57 | /* |
58 | * namei.c | |
59 | */ | |
31d921c7 DH |
60 | extern int filename_lookup(int dfd, struct filename *name, unsigned flags, |
61 | struct path *path, struct path *root); | |
45f30dab DK |
62 | int do_rmdir(int dfd, struct filename *name); |
63 | int do_unlinkat(int dfd, struct filename *name); | |
4609e1f1 | 64 | int may_linkat(struct mnt_idmap *idmap, const struct path *link); |
e886663c JA |
65 | int do_renameat2(int olddfd, struct filename *oldname, int newdfd, |
66 | struct filename *newname, unsigned int flags); | |
45f30dab | 67 | int do_mkdirat(int dfd, struct filename *name, umode_t mode); |
7a8721f8 | 68 | int do_symlinkat(struct filename *from, int newdfd, struct filename *to); |
cf30da90 DK |
69 | int do_linkat(int olddfd, struct filename *old, int newdfd, |
70 | struct filename *new, int flags); | |
0bdaea90 | 71 | |
07f3f05c DH |
72 | /* |
73 | * namespace.c | |
74 | */ | |
ca71cf71 | 75 | extern struct vfsmount *lookup_mnt(const struct path *); |
1e2d8464 | 76 | extern int finish_automount(struct vfsmount *, const struct path *); |
6d59e7f5 | 77 | |
4ed5e82f | 78 | extern int sb_prepare_remount_readonly(struct super_block *); |
f03c6599 | 79 | |
6d59e7f5 | 80 | extern void __init mnt_init(void); |
3e93cd67 | 81 | |
eb04c282 | 82 | extern int __mnt_want_write_file(struct file *); |
eb04c282 | 83 | extern void __mnt_drop_write_file(struct file *); |
47cd813f | 84 | |
a07b2000 | 85 | extern void dissolve_on_fput(struct vfsmount *); |
a5f85d78 | 86 | extern bool may_mount(void); |
c60166f0 CH |
87 | |
88 | int path_mount(const char *dev_name, struct path *path, | |
89 | const char *type_page, unsigned long flags, void *data_page); | |
09267def | 90 | int path_umount(struct path *path, int flags); |
c60166f0 | 91 | |
3e93cd67 AV |
92 | /* |
93 | * fs_struct.c | |
94 | */ | |
dcf787f3 | 95 | extern void chroot_fs_refs(const struct path *, const struct path *); |
864d7c4c | 96 | |
97 | /* | |
98 | * file_table.c | |
99 | */ | |
ea73ea72 | 100 | extern struct file *alloc_empty_file(int, const struct cred *); |
d3b1084d | 101 | extern struct file *alloc_empty_file_noaccount(int, const struct cred *); |
62c6943b | 102 | |
d6da19c9 AG |
103 | static inline void put_file_access(struct file *file) |
104 | { | |
105 | if ((file->f_mode & (FMODE_READ | FMODE_WRITE)) == FMODE_READ) { | |
106 | i_readcount_dec(file->f_inode); | |
107 | } else if (file->f_mode & FMODE_WRITER) { | |
108 | put_write_access(file->f_inode); | |
109 | __mnt_drop_write(file->f_path.mnt); | |
110 | } | |
111 | } | |
112 | ||
62c6943b AV |
113 | /* |
114 | * super.c | |
115 | */ | |
8d0347f6 | 116 | extern int reconfigure_super(struct fs_context *); |
eb6ef3df | 117 | extern bool trylock_super(struct super_block *sb); |
4e7b5671 | 118 | struct super_block *user_get_super(dev_t, bool excl); |
60b49885 | 119 | void put_super(struct super_block *sb); |
20284ab7 | 120 | extern bool mount_capable(struct fs_context *); |
439bc39b | 121 | int sb_init_dio_done_wq(struct super_block *sb); |
482928d5 AV |
122 | |
123 | /* | |
124 | * open.c | |
125 | */ | |
47c805dc AV |
126 | struct open_flags { |
127 | int open_flag; | |
a218d0fd | 128 | umode_t mode; |
47c805dc AV |
129 | int acc_mode; |
130 | int intent; | |
f9652e10 | 131 | int lookup_flags; |
47c805dc | 132 | }; |
669abf4e | 133 | extern struct file *do_filp_open(int dfd, struct filename *pathname, |
f9652e10 | 134 | const struct open_flags *op); |
ffb37ca3 | 135 | extern struct file *do_file_open_root(const struct path *, |
f9652e10 | 136 | const char *, const struct open_flags *); |
35cb6d54 JA |
137 | extern struct open_how build_open_how(int flags, umode_t mode); |
138 | extern int build_open_flags(const struct open_how *how, struct open_flags *op); | |
6319194e | 139 | extern struct file *__close_fd_get_file(unsigned int fd); |
a8dade34 | 140 | |
411d9475 | 141 | long do_sys_ftruncate(unsigned int fd, loff_t length, int small); |
1097742e | 142 | int chmod_common(const struct path *path, umode_t mode); |
55731b3c DB |
143 | int do_fchownat(int dfd, const char __user *filename, uid_t user, gid_t group, |
144 | int flag); | |
b873498f | 145 | int chown_common(const struct path *path, uid_t user, gid_t group); |
ae2bb293 | 146 | extern int vfs_open(const struct path *, struct file *); |
becfd1f3 | 147 | |
a8dade34 AV |
148 | /* |
149 | * inode.c | |
150 | */ | |
503c358c | 151 | extern long prune_icache_sb(struct super_block *sb, struct shrink_control *sc); |
9452e93e CB |
152 | int dentry_needs_remove_privs(struct mnt_idmap *, struct dentry *dentry); |
153 | bool in_group_or_capable(struct mnt_idmap *idmap, | |
11c2a870 | 154 | const struct inode *inode, vfsgid_t vfsgid); |
55fa6091 | 155 | |
a66979ab DC |
156 | /* |
157 | * fs-writeback.c | |
158 | */ | |
3942c07c | 159 | extern long get_nr_dirty_inodes(void); |
93b270f7 | 160 | extern int invalidate_inodes(struct super_block *, bool); |
a4464dbc AV |
161 | |
162 | /* | |
163 | * dcache.c | |
164 | */ | |
eed81007 | 165 | extern int d_set_mounted(struct dentry *dentry); |
503c358c | 166 | extern long prune_dcache_sb(struct super_block *sb, struct shrink_control *sc); |
ba65dc5e | 167 | extern struct dentry *d_alloc_cursor(struct dentry *); |
ab1152dd | 168 | extern struct dentry * d_alloc_pseudo(struct super_block *, const struct qstr *); |
7e5f7bb0 | 169 | extern char *simple_dname(struct dentry *, char *, int); |
9bdebc2b AV |
170 | extern void dput_to_list(struct dentry *, struct list_head *); |
171 | extern void shrink_dentry_list(struct list_head *); | |
06ae43f3 | 172 | |
599a0ac1 AV |
173 | /* |
174 | * pipe.c | |
175 | */ | |
176 | extern const struct file_operations pipefifo_fops; | |
8fa1f1c2 AV |
177 | |
178 | /* | |
179 | * fs_pin.c | |
180 | */ | |
fdab684d | 181 | extern void group_pin_kill(struct hlist_head *p); |
8fa1f1c2 | 182 | extern void mnt_pin_kill(struct mount *m); |
e149ed2b AV |
183 | |
184 | /* | |
185 | * fs/nsfs.c | |
186 | */ | |
be218aa2 | 187 | extern const struct dentry_operations ns_dentry_operations; |
66cf191f | 188 | |
3934e36f JA |
189 | /* |
190 | * fs/stat.c: | |
191 | */ | |
1b6fe6e0 SR |
192 | |
193 | int getname_statx_lookup_flags(int flags); | |
194 | int do_statx(int dfd, struct filename *filename, unsigned int flags, | |
0018784f | 195 | unsigned int mask, struct statx __user *buffer); |
b964bf53 AV |
196 | |
197 | /* | |
198 | * fs/splice.c: | |
199 | */ | |
200 | long splice_file_to_pipe(struct file *in, | |
201 | struct pipe_inode_info *opipe, | |
202 | loff_t *offset, | |
203 | size_t len, unsigned int flags); | |
1a91794c SR |
204 | |
205 | /* | |
206 | * fs/xattr.c: | |
207 | */ | |
208 | struct xattr_name { | |
209 | char name[XATTR_NAME_MAX + 1]; | |
210 | }; | |
211 | ||
212 | struct xattr_ctx { | |
213 | /* Value of attribute */ | |
214 | union { | |
215 | const void __user *cvalue; | |
216 | void __user *value; | |
217 | }; | |
218 | void *kvalue; | |
219 | size_t size; | |
220 | /* Attribute name */ | |
221 | struct xattr_name *kname; | |
222 | unsigned int flags; | |
223 | }; | |
224 | ||
c975cad9 | 225 | |
5a6f52d2 | 226 | ssize_t do_getxattr(struct mnt_idmap *idmap, |
c975cad9 SR |
227 | struct dentry *d, |
228 | struct xattr_ctx *ctx); | |
229 | ||
1a91794c | 230 | int setxattr_copy(const char __user *name, struct xattr_ctx *ctx); |
5a6f52d2 | 231 | int do_setxattr(struct mnt_idmap *idmap, struct dentry *dentry, |
1a91794c | 232 | struct xattr_ctx *ctx); |
4609e1f1 | 233 | int may_write_xattr(struct mnt_idmap *idmap, struct inode *inode); |
06bbaa6d | 234 | |
318e6685 | 235 | #ifdef CONFIG_FS_POSIX_ACL |
5a6f52d2 | 236 | int do_set_acl(struct mnt_idmap *idmap, struct dentry *dentry, |
318e6685 | 237 | const char *acl_name, const void *kvalue, size_t size); |
5a6f52d2 | 238 | ssize_t do_get_acl(struct mnt_idmap *idmap, struct dentry *dentry, |
318e6685 CB |
239 | const char *acl_name, void *kvalue, size_t size); |
240 | #else | |
5a6f52d2 | 241 | static inline int do_set_acl(struct mnt_idmap *idmap, |
318e6685 CB |
242 | struct dentry *dentry, const char *acl_name, |
243 | const void *kvalue, size_t size) | |
244 | { | |
245 | return -EOPNOTSUPP; | |
246 | } | |
5a6f52d2 | 247 | static inline ssize_t do_get_acl(struct mnt_idmap *idmap, |
318e6685 CB |
248 | struct dentry *dentry, const char *acl_name, |
249 | void *kvalue, size_t size) | |
250 | { | |
251 | return -EOPNOTSUPP; | |
252 | } | |
253 | #endif | |
06bbaa6d AV |
254 | |
255 | ssize_t __kernel_write_iter(struct file *file, struct iov_iter *from, loff_t *pos); | |
72ae017c CB |
256 | |
257 | /* | |
258 | * fs/attr.c | |
259 | */ | |
3707d84c CB |
260 | struct mnt_idmap *alloc_mnt_idmap(struct user_namespace *mnt_userns); |
261 | struct mnt_idmap *mnt_idmap_get(struct mnt_idmap *idmap); | |
262 | void mnt_idmap_put(struct mnt_idmap *idmap); |