1/*
2 * Copyright (c) 2004-2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
17 */
18#include <linux/compat.h>
19#include <linux/init.h>
20#include <linux/ioctl.h>
21#include <linux/syscalls.h>
22#include <linux/types.h>
23#include <linux/fs.h>
24#include <asm/uaccess.h>
25#include "xfs.h"
26#include "xfs_types.h"
27#include "xfs_fs.h"
28#include "xfs_vfs.h"
29#include "xfs_vnode.h"
30#include "xfs_dfrag.h"
31
32#define  _NATIVE_IOC(cmd, type) \
33	  _IOC(_IOC_DIR(cmd), _IOC_TYPE(cmd), _IOC_NR(cmd), sizeof(type))
34
35#if defined(CONFIG_IA64) || defined(CONFIG_X86_64)
36#define BROKEN_X86_ALIGNMENT
37/* on ia32 l_start is on a 32-bit boundary */
38typedef struct xfs_flock64_32 {
39	__s16		l_type;
40	__s16		l_whence;
41	__s64		l_start	__attribute__((packed));
42			/* len == 0 means until end of file */
43	__s64		l_len __attribute__((packed));
44	__s32		l_sysid;
45	__u32		l_pid;
46	__s32		l_pad[4];	/* reserve area */
47} xfs_flock64_32_t;
48
49#define XFS_IOC_ALLOCSP_32	_IOW ('X', 10, struct xfs_flock64_32)
50#define XFS_IOC_FREESP_32	_IOW ('X', 11, struct xfs_flock64_32)
51#define XFS_IOC_ALLOCSP64_32	_IOW ('X', 36, struct xfs_flock64_32)
52#define XFS_IOC_FREESP64_32	_IOW ('X', 37, struct xfs_flock64_32)
53#define XFS_IOC_RESVSP_32	_IOW ('X', 40, struct xfs_flock64_32)
54#define XFS_IOC_UNRESVSP_32	_IOW ('X', 41, struct xfs_flock64_32)
55#define XFS_IOC_RESVSP64_32	_IOW ('X', 42, struct xfs_flock64_32)
56#define XFS_IOC_UNRESVSP64_32	_IOW ('X', 43, struct xfs_flock64_32)
57
58/* just account for different alignment */
59STATIC unsigned long
60xfs_ioctl32_flock(
61	unsigned long		arg)
62{
63	xfs_flock64_32_t	__user *p32 = (void __user *)arg;
64	xfs_flock64_t		__user *p = compat_alloc_user_space(sizeof(*p));
65
66	if (copy_in_user(&p->l_type,	&p32->l_type,	sizeof(s16)) ||
67	    copy_in_user(&p->l_whence,	&p32->l_whence, sizeof(s16)) ||
68	    copy_in_user(&p->l_start,	&p32->l_start,	sizeof(s64)) ||
69	    copy_in_user(&p->l_len,	&p32->l_len,	sizeof(s64)) ||
70	    copy_in_user(&p->l_sysid,	&p32->l_sysid,	sizeof(s32)) ||
71	    copy_in_user(&p->l_pid,	&p32->l_pid,	sizeof(u32)) ||
72	    copy_in_user(&p->l_pad,	&p32->l_pad,	4*sizeof(u32)))
73		return -EFAULT;
74
75	return (unsigned long)p;
76}
77
78#else
79
80typedef struct xfs_fsop_bulkreq32 {
81	compat_uptr_t	lastip;		/* last inode # pointer		*/
82	__s32		icount;		/* count of entries in buffer	*/
83	compat_uptr_t	ubuffer;	/* user buffer for inode desc.	*/
84	__s32		ocount;		/* output count pointer		*/
85} xfs_fsop_bulkreq32_t;
86
87STATIC unsigned long
88xfs_ioctl32_bulkstat(
89	unsigned long		arg)
90{
91	xfs_fsop_bulkreq32_t	__user *p32 = (void __user *)arg;
92	xfs_fsop_bulkreq_t	__user *p = compat_alloc_user_space(sizeof(*p));
93	u32			addr;
94
95	if (get_user(addr, &p32->lastip) ||
96	    put_user(compat_ptr(addr), &p->lastip) ||
97	    copy_in_user(&p->icount, &p32->icount, sizeof(s32)) ||
98	    get_user(addr, &p32->ubuffer) ||
99	    put_user(compat_ptr(addr), &p->ubuffer) ||
100	    get_user(addr, &p32->ocount) ||
101	    put_user(compat_ptr(addr), &p->ocount))
102		return -EFAULT;
103
104	return (unsigned long)p;
105}
106#endif
107
108STATIC long
109xfs_compat_ioctl(
110	int		mode,
111	struct file	*file,
112	unsigned	cmd,
113	unsigned long	arg)
114{
115	struct inode	*inode = file->f_path.dentry->d_inode;
116	bhv_vnode_t	*vp = vn_from_inode(inode);
117	int		error;
118
119	switch (cmd) {
120	case XFS_IOC_DIOINFO:
121	case XFS_IOC_FSGEOMETRY_V1:
122	case XFS_IOC_FSGEOMETRY:
123	case XFS_IOC_GETVERSION:
124	case XFS_IOC_GETXFLAGS:
125	case XFS_IOC_SETXFLAGS:
126	case XFS_IOC_FSGETXATTR:
127	case XFS_IOC_FSSETXATTR:
128	case XFS_IOC_FSGETXATTRA:
129	case XFS_IOC_FSSETDM:
130	case XFS_IOC_GETBMAP:
131	case XFS_IOC_GETBMAPA:
132	case XFS_IOC_GETBMAPX:
133/* not handled
134	case XFS_IOC_FD_TO_HANDLE:
135	case XFS_IOC_PATH_TO_HANDLE:
136	case XFS_IOC_PATH_TO_FSHANDLE:
137	case XFS_IOC_OPEN_BY_HANDLE:
138	case XFS_IOC_FSSETDM_BY_HANDLE:
139	case XFS_IOC_READLINK_BY_HANDLE:
140	case XFS_IOC_ATTRLIST_BY_HANDLE:
141	case XFS_IOC_ATTRMULTI_BY_HANDLE:
142*/
143	case XFS_IOC_FSCOUNTS:
144	case XFS_IOC_SET_RESBLKS:
145	case XFS_IOC_GET_RESBLKS:
146	case XFS_IOC_FSGROWFSDATA:
147	case XFS_IOC_FSGROWFSLOG:
148	case XFS_IOC_FSGROWFSRT:
149	case XFS_IOC_FREEZE:
150	case XFS_IOC_THAW:
151	case XFS_IOC_GOINGDOWN:
152	case XFS_IOC_ERROR_INJECTION:
153	case XFS_IOC_ERROR_CLEARALL:
154		break;
155
156#ifdef BROKEN_X86_ALIGNMENT
157	/* xfs_flock_t has wrong u32 vs u64 alignment */
158	case XFS_IOC_ALLOCSP_32:
159	case XFS_IOC_FREESP_32:
160	case XFS_IOC_ALLOCSP64_32:
161	case XFS_IOC_FREESP64_32:
162	case XFS_IOC_RESVSP_32:
163	case XFS_IOC_UNRESVSP_32:
164	case XFS_IOC_RESVSP64_32:
165	case XFS_IOC_UNRESVSP64_32:
166		arg = xfs_ioctl32_flock(arg);
167		cmd = _NATIVE_IOC(cmd, struct xfs_flock64);
168		break;
169
170#else /* These are handled fine if no alignment issues */
171	case XFS_IOC_ALLOCSP:
172	case XFS_IOC_FREESP:
173	case XFS_IOC_RESVSP:
174	case XFS_IOC_UNRESVSP:
175	case XFS_IOC_ALLOCSP64:
176	case XFS_IOC_FREESP64:
177	case XFS_IOC_RESVSP64:
178	case XFS_IOC_UNRESVSP64:
179		break;
180
181	/* xfs_bstat_t still has wrong u32 vs u64 alignment */
182	case XFS_IOC_SWAPEXT:
183		break;
184
185	case XFS_IOC_FSBULKSTAT_SINGLE:
186	case XFS_IOC_FSBULKSTAT:
187	case XFS_IOC_FSINUMBERS:
188		arg = xfs_ioctl32_bulkstat(arg);
189		break;
190#endif
191	default:
192		return -ENOIOCTLCMD;
193	}
194
195	error = bhv_vop_ioctl(vp, inode, file, mode, cmd, (void __user *)arg);
196	VMODIFY(vp);
197
198	return error;
199}
200
201long
202xfs_file_compat_ioctl(
203	struct file		*file,
204	unsigned		cmd,
205	unsigned long		arg)
206{
207	return xfs_compat_ioctl(0, file, cmd, arg);
208}
209
210long
211xfs_file_compat_invis_ioctl(
212	struct file		*file,
213	unsigned		cmd,
214	unsigned long		arg)
215{
216	return xfs_compat_ioctl(IO_INVIS, file, cmd, arg);
217}
218