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);
81 mnt_drop_write_file(dst_file
);
85 static long smb_mnt_get_fsinfo(unsigned int xid
, struct cifs_tcon
*tcon
,
89 struct smb_mnt_fs_info
*fsinf
;
91 fsinf
= kzalloc(sizeof(struct smb_mnt_fs_info
), GFP_KERNEL
);
96 fsinf
->protocol_id
= tcon
->ses
->server
->vals
->protocol_id
;
97 fsinf
->device_characteristics
=
98 le32_to_cpu(tcon
->fsDevInfo
.DeviceCharacteristics
);
99 fsinf
->device_type
= le32_to_cpu(tcon
->fsDevInfo
.DeviceType
);
100 fsinf
->fs_attributes
= le32_to_cpu(tcon
->fsAttrInfo
.Attributes
);
101 fsinf
->max_path_component
=
102 le32_to_cpu(tcon
->fsAttrInfo
.MaxPathNameComponentLength
);
103 #ifdef CONFIG_CIFS_SMB2
104 fsinf
->vol_serial_number
= tcon
->vol_serial_number
;
105 fsinf
->vol_create_time
= le64_to_cpu(tcon
->vol_create_time
);
106 fsinf
->share_flags
= tcon
->share_flags
;
107 fsinf
->share_caps
= le32_to_cpu(tcon
->capabilities
);
108 fsinf
->sector_flags
= tcon
->ss_flags
;
109 fsinf
->optimal_sector_size
= tcon
->perf_sector_size
;
110 fsinf
->max_bytes_chunk
= tcon
->max_bytes_chunk
;
111 fsinf
->maximal_access
= tcon
->maximal_access
;
113 fsinf
->cifs_posix_caps
= le64_to_cpu(tcon
->fsUnixInfo
.Capability
);
115 if (copy_to_user(arg
, fsinf
, sizeof(struct smb_mnt_fs_info
)))
122 long cifs_ioctl(struct file
*filep
, unsigned int command
, unsigned long arg
)
124 struct inode
*inode
= file_inode(filep
);
125 int rc
= -ENOTTY
; /* strange error - but the precedent */
127 struct cifs_sb_info
*cifs_sb
;
128 struct cifsFileInfo
*pSMBFile
= filep
->private_data
;
129 struct cifs_tcon
*tcon
;
130 __u64 ExtAttrBits
= 0;
135 cifs_sb
= CIFS_SB(inode
->i_sb
);
136 cifs_dbg(FYI
, "cifs ioctl 0x%x\n", command
);
138 case FS_IOC_GETFLAGS
:
139 if (pSMBFile
== NULL
)
141 tcon
= tlink_tcon(pSMBFile
->tlink
);
142 caps
= le64_to_cpu(tcon
->fsUnixInfo
.Capability
);
143 #ifdef CONFIG_CIFS_POSIX
144 if (CIFS_UNIX_EXTATTR_CAP
& caps
) {
145 __u64 ExtAttrMask
= 0;
146 rc
= CIFSGetExtAttr(xid
, tcon
,
147 pSMBFile
->fid
.netfid
,
148 &ExtAttrBits
, &ExtAttrMask
);
150 rc
= put_user(ExtAttrBits
&
153 if (rc
!= EOPNOTSUPP
)
156 #endif /* CONFIG_CIFS_POSIX */
158 if (CIFS_I(inode
)->cifsAttrs
& ATTR_COMPRESSED
) {
159 /* add in the compressed bit */
160 ExtAttrBits
= FS_COMPR_FL
;
161 rc
= put_user(ExtAttrBits
& FS_FL_USER_VISIBLE
,
165 case FS_IOC_SETFLAGS
:
166 if (pSMBFile
== NULL
)
168 tcon
= tlink_tcon(pSMBFile
->tlink
);
169 caps
= le64_to_cpu(tcon
->fsUnixInfo
.Capability
);
171 if (get_user(ExtAttrBits
, (int __user
*)arg
)) {
177 * if (CIFS_UNIX_EXTATTR_CAP & caps)
178 * rc = CIFSSetExtAttr(xid, tcon,
179 * pSMBFile->fid.netfid,
182 * if (rc != EOPNOTSUPP)
186 /* Currently only flag we can set is compressed flag */
187 if ((ExtAttrBits
& FS_COMPR_FL
) == 0)
190 /* Try to set compress flag */
191 if (tcon
->ses
->server
->ops
->set_compression
) {
192 rc
= tcon
->ses
->server
->ops
->set_compression(
193 xid
, tcon
, pSMBFile
);
194 cifs_dbg(FYI
, "set compress flag rc %d\n", rc
);
197 case CIFS_IOC_COPYCHUNK_FILE
:
198 rc
= cifs_ioctl_copychunk(xid
, filep
, arg
);
200 case CIFS_IOC_SET_INTEGRITY
:
201 if (pSMBFile
== NULL
)
203 tcon
= tlink_tcon(pSMBFile
->tlink
);
204 if (tcon
->ses
->server
->ops
->set_integrity
)
205 rc
= tcon
->ses
->server
->ops
->set_integrity(xid
,
210 case CIFS_IOC_GET_MNT_INFO
:
211 tcon
= tlink_tcon(pSMBFile
->tlink
);
212 rc
= smb_mnt_get_fsinfo(xid
, tcon
, (void __user
*)arg
);
214 case CIFS_ENUMERATE_SNAPSHOTS
:
219 tcon
= tlink_tcon(pSMBFile
->tlink
);
220 if (tcon
->ses
->server
->ops
->enum_snapshots
)
221 rc
= tcon
->ses
->server
->ops
->enum_snapshots(xid
, tcon
,
222 pSMBFile
, (void __user
*)arg
);
227 cifs_dbg(FYI
, "unsupported ioctl\n");