internal.h (5909B)
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);