xref: /linux/drivers/s390/char/hmcdrv_ftp.h (revision 498495dba268b20e8eadd7fe93c140c68b6cc9d2)
1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3  *    SE/HMC Drive FTP Services
4  *
5  *    Copyright IBM Corp. 2013
6  *    Author(s): Ralf Hoppe (rhoppe@de.ibm.com)
7  */
8 
9 #ifndef __HMCDRV_FTP_H__
10 #define __HMCDRV_FTP_H__
11 
12 #include <linux/types.h> /* size_t, loff_t */
13 
14 /*
15  * HMC drive FTP Service max. length of path (w/ EOS)
16  */
17 #define HMCDRV_FTP_FIDENT_MAX 192
18 
19 /**
20  * enum hmcdrv_ftp_cmdid - HMC drive FTP commands
21  * @HMCDRV_FTP_NOOP: do nothing (only for probing)
22  * @HMCDRV_FTP_GET: read a file
23  * @HMCDRV_FTP_PUT: (over-) write a file
24  * @HMCDRV_FTP_APPEND: append to a file
25  * @HMCDRV_FTP_DIR: list directory long (ls -l)
26  * @HMCDRV_FTP_NLIST: list files, no directories (name list)
27  * @HMCDRV_FTP_DELETE: delete a file
28  * @HMCDRV_FTP_CANCEL: cancel operation (SCLP/LPAR only)
29  */
30 enum hmcdrv_ftp_cmdid {
31 	HMCDRV_FTP_NOOP = 0,
32 	HMCDRV_FTP_GET = 1,
33 	HMCDRV_FTP_PUT = 2,
34 	HMCDRV_FTP_APPEND = 3,
35 	HMCDRV_FTP_DIR = 4,
36 	HMCDRV_FTP_NLIST = 5,
37 	HMCDRV_FTP_DELETE = 6,
38 	HMCDRV_FTP_CANCEL = 7
39 };
40 
41 /**
42  * struct hmcdrv_ftp_cmdspec - FTP command specification
43  * @id: FTP command ID
44  * @ofs: offset in file
45  * @fname: filename (ASCII), null-terminated
46  * @buf: kernel-space transfer data buffer, 4k aligned
47  * @len: (max) number of bytes to transfer from/to @buf
48  */
49 struct hmcdrv_ftp_cmdspec {
50 	enum hmcdrv_ftp_cmdid id;
51 	loff_t ofs;
52 	const char *fname;
53 	void __kernel *buf;
54 	size_t len;
55 };
56 
57 int hmcdrv_ftp_startup(void);
58 void hmcdrv_ftp_shutdown(void);
59 int hmcdrv_ftp_probe(void);
60 ssize_t hmcdrv_ftp_do(const struct hmcdrv_ftp_cmdspec *ftp);
61 ssize_t hmcdrv_ftp_cmd(char __kernel *cmd, loff_t offset,
62 		       char __user *buf, size_t len);
63 
64 #endif	 /* __HMCDRV_FTP_H__ */
65