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 extern bool may_mount(void); 88 89 int path_mount(const char *dev_name, struct path *path, 90 const char *type_page, unsigned long flags, void *data_page); 91 int path_umount(struct path *path, int flags); 92 93 /* 94 * fs_struct.c 95 */ 96 extern void chroot_fs_refs(const struct path *, const struct path *); 97 98 /* 99 * file_table.c 100 */ 101 extern struct file *alloc_empty_file(int, const struct cred *); 102 extern struct file *alloc_empty_file_noaccount(int, const struct cred *); 103 104 /* 105 * super.c 106 */ 107 extern int reconfigure_super(struct fs_context *); 108 extern bool trylock_super(struct super_block *sb); 109 struct super_block *user_get_super(dev_t, bool excl); 110 void put_super(struct super_block *sb); 111 extern bool mount_capable(struct fs_context *); 112 113 /* 114 * open.c 115 */ 116 struct open_flags { 117 int open_flag; 118 umode_t mode; 119 int acc_mode; 120 int intent; 121 int lookup_flags; 122 }; 123 extern struct file *do_filp_open(int dfd, struct filename *pathname, 124 const struct open_flags *op); 125 extern struct file *do_file_open_root(const struct path *, 126 const char *, const struct open_flags *); 127 extern struct open_how build_open_how(int flags, umode_t mode); 128 extern int build_open_flags(const struct open_how *how, struct open_flags *op); 129 extern struct file *__close_fd_get_file(unsigned int fd); 130 131 long do_sys_ftruncate(unsigned int fd, loff_t length, int small); 132 int chmod_common(const struct path *path, umode_t mode); 133 int do_fchownat(int dfd, const char __user *filename, uid_t user, gid_t group, 134 int flag); 135 int chown_common(const struct path *path, uid_t user, gid_t group); 136 extern int vfs_open(const struct path *, struct file *); 137 138 /* 139 * inode.c 140 */ 141 extern long prune_icache_sb(struct super_block *sb, struct shrink_control *sc); 142 extern int dentry_needs_remove_privs(struct dentry *dentry); 143 144 /* 145 * fs-writeback.c 146 */ 147 extern long get_nr_dirty_inodes(void); 148 extern int invalidate_inodes(struct super_block *, bool); 149 150 /* 151 * dcache.c 152 */ 153 extern int d_set_mounted(struct dentry *dentry); 154 extern long prune_dcache_sb(struct super_block *sb, struct shrink_control *sc); 155 extern struct dentry *d_alloc_cursor(struct dentry *); 156 extern struct dentry * d_alloc_pseudo(struct super_block *, const struct qstr *); 157 extern char *simple_dname(struct dentry *, char *, int); 158 extern void dput_to_list(struct dentry *, struct list_head *); 159 extern void shrink_dentry_list(struct list_head *); 160 161 /* 162 * pipe.c 163 */ 164 extern const struct file_operations pipefifo_fops; 165 166 /* 167 * fs_pin.c 168 */ 169 extern void group_pin_kill(struct hlist_head *p); 170 extern void mnt_pin_kill(struct mount *m); 171 172 /* 173 * fs/nsfs.c 174 */ 175 extern const struct dentry_operations ns_dentry_operations; 176 177 /* direct-io.c: */ 178 int sb_init_dio_done_wq(struct super_block *sb); 179 180 /* 181 * fs/stat.c: 182 */ 183 184 int getname_statx_lookup_flags(int flags); 185 int 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 */ 191 long 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 */ 199 struct xattr_name { 200 char name[XATTR_NAME_MAX + 1]; 201 }; 202 203 struct 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 }; 215 216 217 ssize_t do_getxattr(struct user_namespace *mnt_userns, 218 struct dentry *d, 219 struct xattr_ctx *ctx); 220 221 int setxattr_copy(const char __user *name, struct xattr_ctx *ctx); 222 int do_setxattr(struct user_namespace *mnt_userns, struct dentry *dentry, 223 struct xattr_ctx *ctx); 224