4 * vfs operations that deal with io control
6 * Copyright (C) International Business Machines Corp., 2005,2013
7 * Author(s): Steve French (sfrench@us.ibm.com)
9 * This library is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU Lesser General Public License as published
11 * by the Free Software Foundation; either version 2.1 of the License, or
12 * (at your option) any later version.
14 * This library is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
17 * the GNU Lesser General Public License for more details.
19 * You should have received a copy of the GNU Lesser General Public License
20 * along with this library; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 #include <linux/file.h>
26 #include <linux/mount.h>
28 #include <linux/pagemap.h>
31 #include "cifsproto.h"
32 #include "cifs_debug.h"
34 #include "cifs_ioctl.h"
35 #include <linux/btrfs.h>
37 static long cifs_ioctl_copychunk(unsigned int xid
, struct file
*dst_file
,
42 struct inode
*src_inode
;
44 cifs_dbg(FYI
, "ioctl copychunk range\n");
45 /* the destination must be opened for writing */
46 if (!(dst_file
->f_mode
& FMODE_WRITE
)) {
47 cifs_dbg(FYI
, "file target not open for write\n");
51 /* check if target volume is readonly and take reference */
52 rc
= mnt_want_write_file(dst_file
);
54 cifs_dbg(FYI
, "mnt_want_write failed with rc %d\n", rc
);
58 src_file
= fdget(srcfd
);
64 if (src_file
.file
->f_op
->unlocked_ioctl
!= cifs_ioctl
) {
66 cifs_dbg(VFS
, "src file seems to be from a different filesystem type\n");
70 src_inode
= file_inode(src_file
.file
);
72 if (S_ISDIR(src_inode
->i_mode
))
75 rc
= cifs_file_copychunk_range(xid
, src_file
.file
, 0, dst_file
, 0,
76 src_inode
->i_size
, 0);
82 mnt_drop_write_file(dst_file
);
86 static long smb_mnt_get_fsinfo(unsigned int xid
, struct cifs_tcon
*tcon
,
90 struct smb_mnt_fs_info
*fsinf
;
92 fsinf
= kzalloc(sizeof(struct smb_mnt_fs_info
), GFP_KERNEL
);
97 fsinf
->protocol_id
= tcon
->ses
->server
->vals
->protocol_id
;
98 fsinf
->device_characteristics
=
99 le32_to_cpu(tcon
->fsDevInfo
.DeviceCharacteristics
);
100 fsinf
->device_type
= le32_to_cpu(tcon
->fsDevInfo
.DeviceType
);
101 fsinf
->fs_attributes
= le32_to_cpu(tcon
->fsAttrInfo
.Attributes
);
102 fsinf
->max_path_component
=
103 le32_to_cpu(tcon
->fsAttrInfo
.MaxPathNameComponentLength
);
104 #ifdef CONFIG_CIFS_SMB2
105 fsinf
->vol_serial_number
= tcon
->vol_serial_number
;
106 fsinf
->vol_create_time
= le64_to_cpu(tcon
->vol_create_time
);
107 fsinf
->share_flags
= tcon
->share_flags
;
108 fsinf
->share_caps
= le32_to_cpu(tcon
->capabilities
);
109 fsinf
->sector_flags
= tcon
->ss_flags
;
110 fsinf
->optimal_sector_size
= tcon
->perf_sector_size
;
111 fsinf
->max_bytes_chunk
= tcon
->max_bytes_chunk
;
112 fsinf
->maximal_access
= tcon
->maximal_access
;
114 fsinf
->cifs_posix_caps
= le64_to_cpu(tcon
->fsUnixInfo
.Capability
);
116 if (copy_to_user(arg
, fsinf
, sizeof(struct smb_mnt_fs_info
)))
123 long cifs_ioctl(struct file
*filep
, unsigned int command
, unsigned long arg
)
125 struct inode
*inode
= file_inode(filep
);
126 int rc
= -ENOTTY
; /* strange error - but the precedent */
128 struct cifs_sb_info
*cifs_sb
;
129 struct cifsFileInfo
*pSMBFile
= filep
->private_data
;
130 struct cifs_tcon
*tcon
;
131 __u64 ExtAttrBits
= 0;
136 cifs_sb
= CIFS_SB(inode
->i_sb
);
137 cifs_dbg(FYI
, "cifs ioctl 0x%x\n", command
);
139 case FS_IOC_GETFLAGS
:
140 if (pSMBFile
== NULL
)
142 tcon
= tlink_tcon(pSMBFile
->tlink
);
143 caps
= le64_to_cpu(tcon
->fsUnixInfo
.Capability
);
144 #ifdef CONFIG_CIFS_POSIX
145 if (CIFS_UNIX_EXTATTR_CAP
& caps
) {
146 __u64 ExtAttrMask
= 0;
147 rc
= CIFSGetExtAttr(xid
, tcon
,
148 pSMBFile
->fid
.netfid
,
149 &ExtAttrBits
, &ExtAttrMask
);
151 rc
= put_user(ExtAttrBits
&
154 if (rc
!= EOPNOTSUPP
)
157 #endif /* CONFIG_CIFS_POSIX */
159 if (CIFS_I(inode
)->cifsAttrs
& ATTR_COMPRESSED
) {
160 /* add in the compressed bit */
161 ExtAttrBits
= FS_COMPR_FL
;
162 rc
= put_user(ExtAttrBits
& FS_FL_USER_VISIBLE
,
166 case FS_IOC_SETFLAGS
:
167 if (pSMBFile
== NULL
)
169 tcon
= tlink_tcon(pSMBFile
->tlink
);
170 caps
= le64_to_cpu(tcon
->fsUnixInfo
.Capability
);
172 if (get_user(ExtAttrBits
, (int __user
*)arg
)) {
178 * if (CIFS_UNIX_EXTATTR_CAP & caps)
179 * rc = CIFSSetExtAttr(xid, tcon,
180 * pSMBFile->fid.netfid,
183 * if (rc != EOPNOTSUPP)
187 /* Currently only flag we can set is compressed flag */
188 if ((ExtAttrBits
& FS_COMPR_FL
) == 0)
191 /* Try to set compress flag */
192 if (tcon
->ses
->server
->ops
->set_compression
) {
193 rc
= tcon
->ses
->server
->ops
->set_compression(
194 xid
, tcon
, pSMBFile
);
195 cifs_dbg(FYI
, "set compress flag rc %d\n", rc
);
198 case CIFS_IOC_COPYCHUNK_FILE
:
199 rc
= cifs_ioctl_copychunk(xid
, filep
, arg
);
201 case CIFS_IOC_SET_INTEGRITY
:
202 if (pSMBFile
== NULL
)
204 tcon
= tlink_tcon(pSMBFile
->tlink
);
205 if (tcon
->ses
->server
->ops
->set_integrity
)
206 rc
= tcon
->ses
->server
->ops
->set_integrity(xid
,
211 case CIFS_IOC_GET_MNT_INFO
:
212 if (pSMBFile
== NULL
)
214 tcon
= tlink_tcon(pSMBFile
->tlink
);
215 rc
= smb_mnt_get_fsinfo(xid
, tcon
, (void __user
*)arg
);
217 case CIFS_ENUMERATE_SNAPSHOTS
:
218 if (pSMBFile
== NULL
)
224 tcon
= tlink_tcon(pSMBFile
->tlink
);
225 if (tcon
->ses
->server
->ops
->enum_snapshots
)
226 rc
= tcon
->ses
->server
->ops
->enum_snapshots(xid
, tcon
,
227 pSMBFile
, (void __user
*)arg
);
232 cifs_dbg(FYI
, "unsupported ioctl\n");