1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3  *   Copyright (C) 2016 Namjae Jeon <linkinjeon@kernel.org>
4  *   Copyright (C) 2018 Samsung Electronics Co., Ltd.
5  */
6 
7 #ifndef __KSMBD_VFS_H__
8 #define __KSMBD_VFS_H__
9 
10 #include <linux/file.h>
11 #include <linux/fs.h>
12 #include <linux/namei.h>
13 #include <uapi/linux/xattr.h>
14 #include <linux/posix_acl.h>
15 #include <linux/unicode.h>
16 
17 #include "smbacl.h"
18 #include "xattr.h"
19 
20 /*
21  * Enumeration for stream type.
22  */
23 enum {
24 	DATA_STREAM	= 1,	/* type $DATA */
25 	DIR_STREAM		/* type $INDEX_ALLOCATION */
26 };
27 
28 /* CreateOptions */
29 #define CREATE_TREE_CONNECTION			cpu_to_le32(0x00000080)
30 #define FILE_RESERVE_OPFILTER_LE		cpu_to_le32(0x00100000)
31 
32 #define CREATE_OPTION_READONLY			0x10000000
33 /* system. NB not sent over wire */
34 #define CREATE_OPTION_SPECIAL			0x20000000
35 
36 struct ksmbd_work;
37 struct ksmbd_file;
38 struct ksmbd_conn;
39 
40 struct ksmbd_dir_info {
41 	const char	*name;
42 	char		*wptr;
43 	char		*rptr;
44 	int		name_len;
45 	int		out_buf_len;
46 	int		num_entry;
47 	int		data_count;
48 	int		last_entry_offset;
49 	bool		hide_dot_file;
50 	int		flags;
51 	int		last_entry_off_align;
52 };
53 
54 struct ksmbd_readdir_data {
55 	struct dir_context	ctx;
56 	union {
57 		void		*private;
58 		char		*dirent;
59 	};
60 
61 	unsigned int		used;
62 	unsigned int		dirent_count;
63 	unsigned int		file_attr;
64 	struct unicode_map	*um;
65 };
66 
67 /* ksmbd kstat wrapper to get valid create time when reading dir entry */
68 struct ksmbd_kstat {
69 	struct kstat		*kstat;
70 	unsigned long long	create_time;
71 	__le32			file_attributes;
72 };
73 
74 int ksmbd_vfs_lock_parent(struct user_namespace *user_ns, struct dentry *parent,
75 			  struct dentry *child);
76 int ksmbd_vfs_may_delete(struct user_namespace *user_ns, struct dentry *dentry);
77 int ksmbd_vfs_query_maximal_access(struct user_namespace *user_ns,
78 				   struct dentry *dentry, __le32 *daccess);
79 int ksmbd_vfs_create(struct ksmbd_work *work, const char *name, umode_t mode);
80 int ksmbd_vfs_mkdir(struct ksmbd_work *work, const char *name, umode_t mode);
81 int ksmbd_vfs_read(struct ksmbd_work *work, struct ksmbd_file *fp,
82 		   size_t count, loff_t *pos);
83 int ksmbd_vfs_write(struct ksmbd_work *work, struct ksmbd_file *fp,
84 		    char *buf, size_t count, loff_t *pos, bool sync,
85 		    ssize_t *written);
86 int ksmbd_vfs_fsync(struct ksmbd_work *work, u64 fid, u64 p_id);
87 int ksmbd_vfs_remove_file(struct ksmbd_work *work, char *name);
88 int ksmbd_vfs_link(struct ksmbd_work *work,
89 		   const char *oldname, const char *newname);
90 int ksmbd_vfs_getattr(const struct path *path, struct kstat *stat);
91 int ksmbd_vfs_fp_rename(struct ksmbd_work *work, struct ksmbd_file *fp,
92 			char *newname);
93 int ksmbd_vfs_truncate(struct ksmbd_work *work,
94 		       struct ksmbd_file *fp, loff_t size);
95 struct srv_copychunk;
96 int ksmbd_vfs_copy_file_ranges(struct ksmbd_work *work,
97 			       struct ksmbd_file *src_fp,
98 			       struct ksmbd_file *dst_fp,
99 			       struct srv_copychunk *chunks,
100 			       unsigned int chunk_count,
101 			       unsigned int *chunk_count_written,
102 			       unsigned int *chunk_size_written,
103 			       loff_t  *total_size_written);
104 ssize_t ksmbd_vfs_listxattr(struct dentry *dentry, char **list);
105 ssize_t ksmbd_vfs_getxattr(struct user_namespace *user_ns,
106 			   struct dentry *dentry,
107 			   char *xattr_name,
108 			   char **xattr_buf);
109 ssize_t ksmbd_vfs_casexattr_len(struct user_namespace *user_ns,
110 				struct dentry *dentry, char *attr_name,
111 				int attr_name_len);
112 int ksmbd_vfs_setxattr(struct user_namespace *user_ns,
113 		       struct dentry *dentry, const char *attr_name,
114 		       void *attr_value, size_t attr_size, int flags);
115 int ksmbd_vfs_xattr_stream_name(char *stream_name, char **xattr_stream_name,
116 				size_t *xattr_stream_name_size, int s_type);
117 int ksmbd_vfs_remove_xattr(struct user_namespace *user_ns,
118 			   struct dentry *dentry, char *attr_name);
119 int ksmbd_vfs_kern_path(struct ksmbd_work *work,
120 			char *name, unsigned int flags, struct path *path,
121 			bool caseless);
122 struct dentry *ksmbd_vfs_kern_path_create(struct ksmbd_work *work,
123 					  const char *name,
124 					  unsigned int flags,
125 					  struct path *path);
126 int ksmbd_vfs_empty_dir(struct ksmbd_file *fp);
127 void ksmbd_vfs_set_fadvise(struct file *filp, __le32 option);
128 int ksmbd_vfs_zero_data(struct ksmbd_work *work, struct ksmbd_file *fp,
129 			loff_t off, loff_t len);
130 struct file_allocated_range_buffer;
131 int ksmbd_vfs_fqar_lseek(struct ksmbd_file *fp, loff_t start, loff_t length,
132 			 struct file_allocated_range_buffer *ranges,
133 			 unsigned int in_count, unsigned int *out_count);
134 int ksmbd_vfs_unlink(struct user_namespace *user_ns,
135 		     struct dentry *dir, struct dentry *dentry);
136 void *ksmbd_vfs_init_kstat(char **p, struct ksmbd_kstat *ksmbd_kstat);
137 int ksmbd_vfs_fill_dentry_attrs(struct ksmbd_work *work,
138 				struct user_namespace *user_ns,
139 				struct dentry *dentry,
140 				struct ksmbd_kstat *ksmbd_kstat);
141 void ksmbd_vfs_posix_lock_wait(struct file_lock *flock);
142 int ksmbd_vfs_posix_lock_wait_timeout(struct file_lock *flock, long timeout);
143 void ksmbd_vfs_posix_lock_unblock(struct file_lock *flock);
144 int ksmbd_vfs_remove_acl_xattrs(struct user_namespace *user_ns,
145 				struct dentry *dentry);
146 int ksmbd_vfs_remove_sd_xattrs(struct user_namespace *user_ns,
147 			       struct dentry *dentry);
148 int ksmbd_vfs_set_sd_xattr(struct ksmbd_conn *conn,
149 			   struct user_namespace *user_ns,
150 			   struct dentry *dentry,
151 			   struct smb_ntsd *pntsd, int len);
152 int ksmbd_vfs_get_sd_xattr(struct ksmbd_conn *conn,
153 			   struct user_namespace *user_ns,
154 			   struct dentry *dentry,
155 			   struct smb_ntsd **pntsd);
156 int ksmbd_vfs_set_dos_attrib_xattr(struct user_namespace *user_ns,
157 				   struct dentry *dentry,
158 				   struct xattr_dos_attrib *da);
159 int ksmbd_vfs_get_dos_attrib_xattr(struct user_namespace *user_ns,
160 				   struct dentry *dentry,
161 				   struct xattr_dos_attrib *da);
162 int ksmbd_vfs_set_init_posix_acl(struct user_namespace *user_ns,
163 				 struct inode *inode);
164 int ksmbd_vfs_inherit_posix_acl(struct user_namespace *user_ns,
165 				struct inode *inode,
166 				struct inode *parent_inode);
167 #endif /* __KSMBD_VFS_H__ */
168