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1/*
2 * fs/cifs/ioctl.c
3 *
4 * vfs operations that deal with io control
5 *
6 * Copyright (C) International Business Machines Corp., 2005,2013
7 * Author(s): Steve French (sfrench@us.ibm.com)
8 *
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.
13 *
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.
18 *
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
22 */
23
24#include <linux/fs.h>
25#include <linux/file.h>
26#include <linux/mount.h>
27#include <linux/mm.h>
28#include <linux/pagemap.h>
29#include "cifspdu.h"
30#include "cifsglob.h"
31#include "cifsproto.h"
32#include "cifs_debug.h"
33#include "cifsfs.h"
34#include "cifs_ioctl.h"
35#include <linux/btrfs.h>
36
37static int cifs_file_clone_range(unsigned int xid, struct file *src_file,
38 struct file *dst_file)
39{
40 struct inode *src_inode = file_inode(src_file);
41 struct inode *target_inode = file_inode(dst_file);
42 struct cifsFileInfo *smb_file_src;
43 struct cifsFileInfo *smb_file_target;
44 struct cifs_tcon *src_tcon;
45 struct cifs_tcon *target_tcon;
46 int rc;
47
48 cifs_dbg(FYI, "ioctl clone range\n");
49
50 if (!src_file->private_data || !dst_file->private_data) {
51 rc = -EBADF;
52 cifs_dbg(VFS, "missing cifsFileInfo on copy range src file\n");
53 goto out;
54 }
55
56 rc = -EXDEV;
57 smb_file_target = dst_file->private_data;
58 smb_file_src = src_file->private_data;
59 src_tcon = tlink_tcon(smb_file_src->tlink);
60 target_tcon = tlink_tcon(smb_file_target->tlink);
61
62 if (src_tcon->ses != target_tcon->ses) {
63 cifs_dbg(VFS, "source and target of copy not on same server\n");
64 goto out;
65 }
66
67 /*
68 * Note: cifs case is easier than btrfs since server responsible for
69 * checks for proper open modes and file type and if it wants
70 * server could even support copy of range where source = target
71 */
72 lock_two_nondirectories(target_inode, src_inode);
73
74 cifs_dbg(FYI, "about to flush pages\n");
75 /* should we flush first and last page first */
76 truncate_inode_pages(&target_inode->i_data, 0);
77
78 if (target_tcon->ses->server->ops->clone_range)
79 rc = target_tcon->ses->server->ops->clone_range(xid,
80 smb_file_src, smb_file_target, 0, src_inode->i_size, 0);
81 else
82 rc = -EOPNOTSUPP;
83
84 /* force revalidate of size and timestamps of target file now
85 that target is updated on the server */
86 CIFS_I(target_inode)->time = 0;
87 /* although unlocking in the reverse order from locking is not
88 strictly necessary here it is a little cleaner to be consistent */
89 unlock_two_nondirectories(src_inode, target_inode);
90out:
91 return rc;
92}
93
94static long cifs_ioctl_clone(unsigned int xid, struct file *dst_file,
95 unsigned long srcfd)
96{
97 int rc;
98 struct fd src_file;
99 struct inode *src_inode;
100
101 cifs_dbg(FYI, "ioctl clone range\n");
102 /* the destination must be opened for writing */
103 if (!(dst_file->f_mode & FMODE_WRITE)) {
104 cifs_dbg(FYI, "file target not open for write\n");
105 return -EINVAL;
106 }
107
108 /* check if target volume is readonly and take reference */
109 rc = mnt_want_write_file(dst_file);
110 if (rc) {
111 cifs_dbg(FYI, "mnt_want_write failed with rc %d\n", rc);
112 return rc;
113 }
114
115 src_file = fdget(srcfd);
116 if (!src_file.file) {
117 rc = -EBADF;
118 goto out_drop_write;
119 }
120
121 if (src_file.file->f_op->unlocked_ioctl != cifs_ioctl) {
122 rc = -EBADF;
123 cifs_dbg(VFS, "src file seems to be from a different filesystem type\n");
124 goto out_fput;
125 }
126
127 src_inode = file_inode(src_file.file);
128 rc = -EINVAL;
129 if (S_ISDIR(src_inode->i_mode))
130 goto out_fput;
131
132 rc = cifs_file_clone_range(xid, src_file.file, dst_file);
133
134out_fput:
135 fdput(src_file);
136out_drop_write:
137 mnt_drop_write_file(dst_file);
138 return rc;
139}
140
141static long smb_mnt_get_fsinfo(unsigned int xid, struct cifs_tcon *tcon,
142 void __user *arg)
143{
144 int rc = 0;
145 struct smb_mnt_fs_info *fsinf;
146
147 fsinf = kzalloc(sizeof(struct smb_mnt_fs_info), GFP_KERNEL);
148 if (fsinf == NULL)
149 return -ENOMEM;
150
151 fsinf->version = 1;
152 fsinf->protocol_id = tcon->ses->server->vals->protocol_id;
153 fsinf->device_characteristics =
154 le32_to_cpu(tcon->fsDevInfo.DeviceCharacteristics);
155 fsinf->device_type = le32_to_cpu(tcon->fsDevInfo.DeviceType);
156 fsinf->fs_attributes = le32_to_cpu(tcon->fsAttrInfo.Attributes);
157 fsinf->max_path_component =
158 le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength);
159#ifdef CONFIG_CIFS_SMB2
160 fsinf->vol_serial_number = tcon->vol_serial_number;
161 fsinf->vol_create_time = le64_to_cpu(tcon->vol_create_time);
162 fsinf->share_flags = tcon->share_flags;
163 fsinf->share_caps = le32_to_cpu(tcon->capabilities);
164 fsinf->sector_flags = tcon->ss_flags;
165 fsinf->optimal_sector_size = tcon->perf_sector_size;
166 fsinf->max_bytes_chunk = tcon->max_bytes_chunk;
167 fsinf->maximal_access = tcon->maximal_access;
168#endif /* SMB2 */
169 fsinf->cifs_posix_caps = le64_to_cpu(tcon->fsUnixInfo.Capability);
170
171 if (copy_to_user(arg, fsinf, sizeof(struct smb_mnt_fs_info)))
172 rc = -EFAULT;
173
174 kfree(fsinf);
175 return rc;
176}
177
178long cifs_ioctl(struct file *filep, unsigned int command, unsigned long arg)
179{
180 struct inode *inode = file_inode(filep);
181 int rc = -ENOTTY; /* strange error - but the precedent */
182 unsigned int xid;
183 struct cifs_sb_info *cifs_sb;
184 struct cifsFileInfo *pSMBFile = filep->private_data;
185 struct cifs_tcon *tcon;
186 __u64 ExtAttrBits = 0;
187 __u64 caps;
188
189 xid = get_xid();
190
191 cifs_sb = CIFS_SB(inode->i_sb);
192
193 switch (command) {
194 case FS_IOC_GETFLAGS:
195 if (pSMBFile == NULL)
196 break;
197 tcon = tlink_tcon(pSMBFile->tlink);
198 caps = le64_to_cpu(tcon->fsUnixInfo.Capability);
199#ifdef CONFIG_CIFS_POSIX
200 if (CIFS_UNIX_EXTATTR_CAP & caps) {
201 __u64 ExtAttrMask = 0;
202 rc = CIFSGetExtAttr(xid, tcon,
203 pSMBFile->fid.netfid,
204 &ExtAttrBits, &ExtAttrMask);
205 if (rc == 0)
206 rc = put_user(ExtAttrBits &
207 FS_FL_USER_VISIBLE,
208 (int __user *)arg);
209 if (rc != EOPNOTSUPP)
210 break;
211 }
212#endif /* CONFIG_CIFS_POSIX */
213 rc = 0;
214 if (CIFS_I(inode)->cifsAttrs & ATTR_COMPRESSED) {
215 /* add in the compressed bit */
216 ExtAttrBits = FS_COMPR_FL;
217 rc = put_user(ExtAttrBits & FS_FL_USER_VISIBLE,
218 (int __user *)arg);
219 }
220 break;
221 case FS_IOC_SETFLAGS:
222 if (pSMBFile == NULL)
223 break;
224 tcon = tlink_tcon(pSMBFile->tlink);
225 caps = le64_to_cpu(tcon->fsUnixInfo.Capability);
226
227 if (get_user(ExtAttrBits, (int __user *)arg)) {
228 rc = -EFAULT;
229 break;
230 }
231
232 /*
233 * if (CIFS_UNIX_EXTATTR_CAP & caps)
234 * rc = CIFSSetExtAttr(xid, tcon,
235 * pSMBFile->fid.netfid,
236 * extAttrBits,
237 * &ExtAttrMask);
238 * if (rc != EOPNOTSUPP)
239 * break;
240 */
241
242 /* Currently only flag we can set is compressed flag */
243 if ((ExtAttrBits & FS_COMPR_FL) == 0)
244 break;
245
246 /* Try to set compress flag */
247 if (tcon->ses->server->ops->set_compression) {
248 rc = tcon->ses->server->ops->set_compression(
249 xid, tcon, pSMBFile);
250 cifs_dbg(FYI, "set compress flag rc %d\n", rc);
251 }
252 break;
253 case CIFS_IOC_COPYCHUNK_FILE:
254 rc = cifs_ioctl_clone(xid, filep, arg);
255 break;
256 case CIFS_IOC_SET_INTEGRITY:
257 if (pSMBFile == NULL)
258 break;
259 tcon = tlink_tcon(pSMBFile->tlink);
260 if (tcon->ses->server->ops->set_integrity)
261 rc = tcon->ses->server->ops->set_integrity(xid,
262 tcon, pSMBFile);
263 else
264 rc = -EOPNOTSUPP;
265 break;
266 case CIFS_IOC_GET_MNT_INFO:
267 tcon = tlink_tcon(pSMBFile->tlink);
268 rc = smb_mnt_get_fsinfo(xid, tcon, (void __user *)arg);
269 break;
270 default:
271 cifs_dbg(FYI, "unsupported ioctl\n");
272 break;
273 }
274
275 free_xid(xid);
276 return rc;
277}
1/*
2 * fs/cifs/ioctl.c
3 *
4 * vfs operations that deal with io control
5 *
6 * Copyright (C) International Business Machines Corp., 2005,2013
7 * Author(s): Steve French (sfrench@us.ibm.com)
8 *
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.
13 *
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.
18 *
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
22 */
23
24#include <linux/fs.h>
25#include <linux/file.h>
26#include <linux/mount.h>
27#include <linux/mm.h>
28#include <linux/pagemap.h>
29#include "cifspdu.h"
30#include "cifsglob.h"
31#include "cifsproto.h"
32#include "cifs_debug.h"
33#include "cifsfs.h"
34#include "cifs_ioctl.h"
35#include "smb2proto.h"
36#include <linux/btrfs.h>
37
38static long cifs_ioctl_query_info(unsigned int xid, struct file *filep,
39 unsigned long p)
40{
41 struct inode *inode = file_inode(filep);
42 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
43 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
44 struct dentry *dentry = filep->f_path.dentry;
45 unsigned char *path;
46 __le16 *utf16_path = NULL, root_path;
47 int rc = 0;
48
49 path = build_path_from_dentry(dentry);
50 if (path == NULL)
51 return -ENOMEM;
52
53 cifs_dbg(FYI, "%s %s\n", __func__, path);
54
55 if (!path[0]) {
56 root_path = 0;
57 utf16_path = &root_path;
58 } else {
59 utf16_path = cifs_convert_path_to_utf16(path + 1, cifs_sb);
60 if (!utf16_path) {
61 rc = -ENOMEM;
62 goto ici_exit;
63 }
64 }
65
66 if (tcon->ses->server->ops->ioctl_query_info)
67 rc = tcon->ses->server->ops->ioctl_query_info(
68 xid, tcon, cifs_sb, utf16_path,
69 filep->private_data ? 0 : 1, p);
70 else
71 rc = -EOPNOTSUPP;
72
73 ici_exit:
74 if (utf16_path != &root_path)
75 kfree(utf16_path);
76 kfree(path);
77 return rc;
78}
79
80static long cifs_ioctl_copychunk(unsigned int xid, struct file *dst_file,
81 unsigned long srcfd)
82{
83 int rc;
84 struct fd src_file;
85 struct inode *src_inode;
86
87 cifs_dbg(FYI, "ioctl copychunk range\n");
88 /* the destination must be opened for writing */
89 if (!(dst_file->f_mode & FMODE_WRITE)) {
90 cifs_dbg(FYI, "file target not open for write\n");
91 return -EINVAL;
92 }
93
94 /* check if target volume is readonly and take reference */
95 rc = mnt_want_write_file(dst_file);
96 if (rc) {
97 cifs_dbg(FYI, "mnt_want_write failed with rc %d\n", rc);
98 return rc;
99 }
100
101 src_file = fdget(srcfd);
102 if (!src_file.file) {
103 rc = -EBADF;
104 goto out_drop_write;
105 }
106
107 if (src_file.file->f_op->unlocked_ioctl != cifs_ioctl) {
108 rc = -EBADF;
109 cifs_dbg(VFS, "src file seems to be from a different filesystem type\n");
110 goto out_fput;
111 }
112
113 src_inode = file_inode(src_file.file);
114 rc = -EINVAL;
115 if (S_ISDIR(src_inode->i_mode))
116 goto out_fput;
117
118 rc = cifs_file_copychunk_range(xid, src_file.file, 0, dst_file, 0,
119 src_inode->i_size, 0);
120 if (rc > 0)
121 rc = 0;
122out_fput:
123 fdput(src_file);
124out_drop_write:
125 mnt_drop_write_file(dst_file);
126 return rc;
127}
128
129static long smb_mnt_get_fsinfo(unsigned int xid, struct cifs_tcon *tcon,
130 void __user *arg)
131{
132 int rc = 0;
133 struct smb_mnt_fs_info *fsinf;
134
135 fsinf = kzalloc(sizeof(struct smb_mnt_fs_info), GFP_KERNEL);
136 if (fsinf == NULL)
137 return -ENOMEM;
138
139 fsinf->version = 1;
140 fsinf->protocol_id = tcon->ses->server->vals->protocol_id;
141 fsinf->device_characteristics =
142 le32_to_cpu(tcon->fsDevInfo.DeviceCharacteristics);
143 fsinf->device_type = le32_to_cpu(tcon->fsDevInfo.DeviceType);
144 fsinf->fs_attributes = le32_to_cpu(tcon->fsAttrInfo.Attributes);
145 fsinf->max_path_component =
146 le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength);
147 fsinf->vol_serial_number = tcon->vol_serial_number;
148 fsinf->vol_create_time = le64_to_cpu(tcon->vol_create_time);
149 fsinf->share_flags = tcon->share_flags;
150 fsinf->share_caps = le32_to_cpu(tcon->capabilities);
151 fsinf->sector_flags = tcon->ss_flags;
152 fsinf->optimal_sector_size = tcon->perf_sector_size;
153 fsinf->max_bytes_chunk = tcon->max_bytes_chunk;
154 fsinf->maximal_access = tcon->maximal_access;
155 fsinf->cifs_posix_caps = le64_to_cpu(tcon->fsUnixInfo.Capability);
156
157 if (copy_to_user(arg, fsinf, sizeof(struct smb_mnt_fs_info)))
158 rc = -EFAULT;
159
160 kfree(fsinf);
161 return rc;
162}
163
164long cifs_ioctl(struct file *filep, unsigned int command, unsigned long arg)
165{
166 struct inode *inode = file_inode(filep);
167 struct smb3_key_debug_info pkey_inf;
168 int rc = -ENOTTY; /* strange error - but the precedent */
169 unsigned int xid;
170 struct cifsFileInfo *pSMBFile = filep->private_data;
171 struct cifs_tcon *tcon;
172 struct tcon_link *tlink;
173 struct cifs_sb_info *cifs_sb;
174 __u64 ExtAttrBits = 0;
175 __u64 caps;
176
177 xid = get_xid();
178
179 cifs_dbg(FYI, "cifs ioctl 0x%x\n", command);
180 switch (command) {
181 case FS_IOC_GETFLAGS:
182 if (pSMBFile == NULL)
183 break;
184 tcon = tlink_tcon(pSMBFile->tlink);
185 caps = le64_to_cpu(tcon->fsUnixInfo.Capability);
186#ifdef CONFIG_CIFS_POSIX
187 if (CIFS_UNIX_EXTATTR_CAP & caps) {
188 __u64 ExtAttrMask = 0;
189 rc = CIFSGetExtAttr(xid, tcon,
190 pSMBFile->fid.netfid,
191 &ExtAttrBits, &ExtAttrMask);
192 if (rc == 0)
193 rc = put_user(ExtAttrBits &
194 FS_FL_USER_VISIBLE,
195 (int __user *)arg);
196 if (rc != EOPNOTSUPP)
197 break;
198 }
199#endif /* CONFIG_CIFS_POSIX */
200 rc = 0;
201 if (CIFS_I(inode)->cifsAttrs & ATTR_COMPRESSED) {
202 /* add in the compressed bit */
203 ExtAttrBits = FS_COMPR_FL;
204 rc = put_user(ExtAttrBits & FS_FL_USER_VISIBLE,
205 (int __user *)arg);
206 }
207 break;
208 case FS_IOC_SETFLAGS:
209 if (pSMBFile == NULL)
210 break;
211 tcon = tlink_tcon(pSMBFile->tlink);
212 caps = le64_to_cpu(tcon->fsUnixInfo.Capability);
213
214 if (get_user(ExtAttrBits, (int __user *)arg)) {
215 rc = -EFAULT;
216 break;
217 }
218
219 /*
220 * if (CIFS_UNIX_EXTATTR_CAP & caps)
221 * rc = CIFSSetExtAttr(xid, tcon,
222 * pSMBFile->fid.netfid,
223 * extAttrBits,
224 * &ExtAttrMask);
225 * if (rc != EOPNOTSUPP)
226 * break;
227 */
228
229 /* Currently only flag we can set is compressed flag */
230 if ((ExtAttrBits & FS_COMPR_FL) == 0)
231 break;
232
233 /* Try to set compress flag */
234 if (tcon->ses->server->ops->set_compression) {
235 rc = tcon->ses->server->ops->set_compression(
236 xid, tcon, pSMBFile);
237 cifs_dbg(FYI, "set compress flag rc %d\n", rc);
238 }
239 break;
240 case CIFS_IOC_COPYCHUNK_FILE:
241 rc = cifs_ioctl_copychunk(xid, filep, arg);
242 break;
243 case CIFS_QUERY_INFO:
244 rc = cifs_ioctl_query_info(xid, filep, arg);
245 break;
246 case CIFS_IOC_SET_INTEGRITY:
247 if (pSMBFile == NULL)
248 break;
249 tcon = tlink_tcon(pSMBFile->tlink);
250 if (tcon->ses->server->ops->set_integrity)
251 rc = tcon->ses->server->ops->set_integrity(xid,
252 tcon, pSMBFile);
253 else
254 rc = -EOPNOTSUPP;
255 break;
256 case CIFS_IOC_GET_MNT_INFO:
257 if (pSMBFile == NULL)
258 break;
259 tcon = tlink_tcon(pSMBFile->tlink);
260 rc = smb_mnt_get_fsinfo(xid, tcon, (void __user *)arg);
261 break;
262 case CIFS_ENUMERATE_SNAPSHOTS:
263 if (pSMBFile == NULL)
264 break;
265 if (arg == 0) {
266 rc = -EINVAL;
267 goto cifs_ioc_exit;
268 }
269 tcon = tlink_tcon(pSMBFile->tlink);
270 if (tcon->ses->server->ops->enum_snapshots)
271 rc = tcon->ses->server->ops->enum_snapshots(xid, tcon,
272 pSMBFile, (void __user *)arg);
273 else
274 rc = -EOPNOTSUPP;
275 break;
276 case CIFS_DUMP_KEY:
277 if (pSMBFile == NULL)
278 break;
279 if (!capable(CAP_SYS_ADMIN)) {
280 rc = -EACCES;
281 break;
282 }
283
284 tcon = tlink_tcon(pSMBFile->tlink);
285 if (!smb3_encryption_required(tcon)) {
286 rc = -EOPNOTSUPP;
287 break;
288 }
289 pkey_inf.cipher_type =
290 le16_to_cpu(tcon->ses->server->cipher_type);
291 pkey_inf.Suid = tcon->ses->Suid;
292 memcpy(pkey_inf.auth_key, tcon->ses->auth_key.response,
293 16 /* SMB2_NTLMV2_SESSKEY_SIZE */);
294 memcpy(pkey_inf.smb3decryptionkey,
295 tcon->ses->smb3decryptionkey, SMB3_SIGN_KEY_SIZE);
296 memcpy(pkey_inf.smb3encryptionkey,
297 tcon->ses->smb3encryptionkey, SMB3_SIGN_KEY_SIZE);
298 if (copy_to_user((void __user *)arg, &pkey_inf,
299 sizeof(struct smb3_key_debug_info)))
300 rc = -EFAULT;
301 else
302 rc = 0;
303 break;
304 case CIFS_IOC_NOTIFY:
305 if (!S_ISDIR(inode->i_mode)) {
306 /* Notify can only be done on directories */
307 rc = -EOPNOTSUPP;
308 break;
309 }
310 cifs_sb = CIFS_SB(inode->i_sb);
311 tlink = cifs_sb_tlink(cifs_sb);
312 if (IS_ERR(tlink)) {
313 rc = PTR_ERR(tlink);
314 break;
315 }
316 tcon = tlink_tcon(tlink);
317 if (tcon && tcon->ses->server->ops->notify) {
318 rc = tcon->ses->server->ops->notify(xid,
319 filep, (void __user *)arg);
320 cifs_dbg(FYI, "ioctl notify rc %d\n", rc);
321 } else
322 rc = -EOPNOTSUPP;
323 cifs_put_tlink(tlink);
324 break;
325 default:
326 cifs_dbg(FYI, "unsupported ioctl\n");
327 break;
328 }
329cifs_ioc_exit:
330 free_xid(xid);
331 return rc;
332}