1/* SPDX-License-Identifier: LGPL-2.1 */
  2/*
  3 *
  4 *   Copyright (c) International Business Machines  Corp., 2002, 2007
  5 *   Author(s): Steve French (sfrench@us.ibm.com)
  6 *
  7 */
  8
  9#ifndef _CIFSFS_H
 10#define _CIFSFS_H
 11
 12#include <linux/hash.h>
 13
 14#define ROOT_I 2
 15
 16/*
 17 * ino_t is 32-bits on 32-bit arch. We have to squash the 64-bit value down
 18 * so that it will fit. We use hash_64 to convert the value to 31 bits, and
 19 * then add 1, to ensure that we don't end up with a 0 as the value.
 20 */
 21static inline ino_t
 22cifs_uniqueid_to_ino_t(u64 fileid)
 23{
 24	if ((sizeof(ino_t)) < (sizeof(u64)))
 25		return (ino_t)hash_64(fileid, (sizeof(ino_t) * 8) - 1) + 1;
 26
 27	return (ino_t)fileid;
 28
 29}
 30
 31static inline void cifs_set_time(struct dentry *dentry, unsigned long time)
 32{
 33	dentry->d_fsdata = (void *) time;
 34}
 35
 36static inline unsigned long cifs_get_time(struct dentry *dentry)
 37{
 38	return (unsigned long) dentry->d_fsdata;
 39}
 40
 41extern struct file_system_type cifs_fs_type, smb3_fs_type;
 42extern const struct address_space_operations cifs_addr_ops;
 43extern const struct address_space_operations cifs_addr_ops_smallbuf;
 44
 45/* Functions related to super block operations */
 46extern void cifs_sb_active(struct super_block *sb);
 47extern void cifs_sb_deactive(struct super_block *sb);
 48
 49/* Functions related to inodes */
 50extern const struct inode_operations cifs_dir_inode_ops;
 51extern struct inode *cifs_root_iget(struct super_block *);
 52extern int cifs_create(struct user_namespace *, struct inode *,
 53		       struct dentry *, umode_t, bool excl);
 54extern int cifs_atomic_open(struct inode *, struct dentry *,
 55			    struct file *, unsigned, umode_t);
 56extern struct dentry *cifs_lookup(struct inode *, struct dentry *,
 57				  unsigned int);
 58extern int cifs_unlink(struct inode *dir, struct dentry *dentry);
 59extern int cifs_hardlink(struct dentry *, struct inode *, struct dentry *);
 60extern int cifs_mknod(struct user_namespace *, struct inode *, struct dentry *,
 61		      umode_t, dev_t);
 62extern int cifs_mkdir(struct user_namespace *, struct inode *, struct dentry *,
 63		      umode_t);
 64extern int cifs_rmdir(struct inode *, struct dentry *);
 65extern int cifs_rename2(struct user_namespace *, struct inode *,
 66			struct dentry *, struct inode *, struct dentry *,
 67			unsigned int);
 68extern int cifs_revalidate_file_attr(struct file *filp);
 69extern int cifs_revalidate_dentry_attr(struct dentry *);
 70extern int cifs_revalidate_file(struct file *filp);
 71extern int cifs_revalidate_dentry(struct dentry *);
 72extern int cifs_invalidate_mapping(struct inode *inode);
 73extern int cifs_revalidate_mapping(struct inode *inode);
 74extern int cifs_zap_mapping(struct inode *inode);
 75extern int cifs_getattr(struct user_namespace *, const struct path *,
 76			struct kstat *, u32, unsigned int);
 77extern int cifs_setattr(struct user_namespace *, struct dentry *,
 78			struct iattr *);
 79extern int cifs_fiemap(struct inode *, struct fiemap_extent_info *, u64 start,
 80		       u64 len);
 81
 82extern const struct inode_operations cifs_file_inode_ops;
 83extern const struct inode_operations cifs_symlink_inode_ops;
 84extern const struct inode_operations cifs_dfs_referral_inode_operations;
 85
 86
 87/* Functions related to files and directories */
 88extern const struct file_operations cifs_file_ops;
 89extern const struct file_operations cifs_file_direct_ops; /* if directio mnt */
 90extern const struct file_operations cifs_file_strict_ops; /* if strictio mnt */
 91extern const struct file_operations cifs_file_nobrl_ops; /* no brlocks */
 92extern const struct file_operations cifs_file_direct_nobrl_ops;
 93extern const struct file_operations cifs_file_strict_nobrl_ops;
 94extern int cifs_open(struct inode *inode, struct file *file);
 95extern int cifs_close(struct inode *inode, struct file *file);
 96extern int cifs_closedir(struct inode *inode, struct file *file);
 97extern ssize_t cifs_user_readv(struct kiocb *iocb, struct iov_iter *to);
 98extern ssize_t cifs_direct_readv(struct kiocb *iocb, struct iov_iter *to);
 99extern ssize_t cifs_strict_readv(struct kiocb *iocb, struct iov_iter *to);
100extern ssize_t cifs_user_writev(struct kiocb *iocb, struct iov_iter *from);
101extern ssize_t cifs_direct_writev(struct kiocb *iocb, struct iov_iter *from);
102extern ssize_t cifs_strict_writev(struct kiocb *iocb, struct iov_iter *from);
103extern int cifs_flock(struct file *pfile, int cmd, struct file_lock *plock);
104extern int cifs_lock(struct file *, int, struct file_lock *);
105extern int cifs_fsync(struct file *, loff_t, loff_t, int);
106extern int cifs_strict_fsync(struct file *, loff_t, loff_t, int);
107extern int cifs_flush(struct file *, fl_owner_t id);
108extern int cifs_file_mmap(struct file *file, struct vm_area_struct *vma);
109extern int cifs_file_strict_mmap(struct file *file, struct vm_area_struct *vma);
110extern const struct file_operations cifs_dir_ops;
111extern int cifs_dir_open(struct inode *inode, struct file *file);
112extern int cifs_readdir(struct file *file, struct dir_context *ctx);
113
114/* Functions related to dir entries */
115extern const struct dentry_operations cifs_dentry_ops;
116extern const struct dentry_operations cifs_ci_dentry_ops;
117
118#ifdef CONFIG_CIFS_DFS_UPCALL
119extern struct vfsmount *cifs_dfs_d_automount(struct path *path);
120#else
121#define cifs_dfs_d_automount NULL
122#endif
123
124/* Functions related to symlinks */
125extern const char *cifs_get_link(struct dentry *, struct inode *,
126			struct delayed_call *);
127extern int cifs_symlink(struct user_namespace *mnt_userns, struct inode *inode,
128			struct dentry *direntry, const char *symname);
129
130#ifdef CONFIG_CIFS_XATTR
131extern const struct xattr_handler *cifs_xattr_handlers[];
132extern ssize_t	cifs_listxattr(struct dentry *, char *, size_t);
133#else
134# define cifs_xattr_handlers NULL
135# define cifs_listxattr NULL
136#endif
137
138extern ssize_t cifs_file_copychunk_range(unsigned int xid,
139					struct file *src_file, loff_t off,
140					struct file *dst_file, loff_t destoff,
141					size_t len, unsigned int flags);
142
143extern long cifs_ioctl(struct file *filep, unsigned int cmd, unsigned long arg);
144extern void cifs_setsize(struct inode *inode, loff_t offset);
145extern int cifs_truncate_page(struct address_space *mapping, loff_t from);
146
147struct smb3_fs_context;
148extern struct dentry *cifs_smb3_do_mount(struct file_system_type *fs_type,
149					 int flags, struct smb3_fs_context *ctx);
150
151#ifdef CONFIG_CIFS_NFSD_EXPORT
152extern const struct export_operations cifs_export_ops;
153#endif /* CONFIG_CIFS_NFSD_EXPORT */
154
155/* when changing internal version - update following two lines at same time */
156#define SMB3_PRODUCT_BUILD 41
157#define CIFS_VERSION   "2.41"
158#endif				/* _CIFSFS_H */