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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, 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
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
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 int rc = -ENOTTY;
168 unsigned int xid;
169 struct cifsFileInfo *pSMBFile = filep->private_data;
170 struct cifs_tcon *tcon;
171 __u64 ExtAttrBits = 0;
172 __u64 caps;
173
174 xid = get_xid();
175
176 cifs_dbg(FYI, "cifs ioctl 0x%x\n", command);
177 switch (command) {
178 case FS_IOC_GETFLAGS:
179 if (pSMBFile == NULL)
180 break;
181 tcon = tlink_tcon(pSMBFile->tlink);
182 caps = le64_to_cpu(tcon->fsUnixInfo.Capability);
183#ifdef CONFIG_CIFS_POSIX
184 if (CIFS_UNIX_EXTATTR_CAP & caps) {
185 __u64 ExtAttrMask = 0;
186 rc = CIFSGetExtAttr(xid, tcon,
187 pSMBFile->fid.netfid,
188 &ExtAttrBits, &ExtAttrMask);
189 if (rc == 0)
190 rc = put_user(ExtAttrBits &
191 FS_FL_USER_VISIBLE,
192 (int __user *)arg);
193 if (rc != EOPNOTSUPP)
194 break;
195 }
196#endif
197 rc = 0;
198 if (CIFS_I(inode)->cifsAttrs & ATTR_COMPRESSED) {
199
200 ExtAttrBits = FS_COMPR_FL;
201 rc = put_user(ExtAttrBits & FS_FL_USER_VISIBLE,
202 (int __user *)arg);
203 }
204 break;
205 case FS_IOC_SETFLAGS:
206 if (pSMBFile == NULL)
207 break;
208 tcon = tlink_tcon(pSMBFile->tlink);
209 caps = le64_to_cpu(tcon->fsUnixInfo.Capability);
210
211 if (get_user(ExtAttrBits, (int __user *)arg)) {
212 rc = -EFAULT;
213 break;
214 }
215
216
217
218
219
220
221
222
223
224
225
226
227 if ((ExtAttrBits & FS_COMPR_FL) == 0)
228 break;
229
230
231 if (tcon->ses->server->ops->set_compression) {
232 rc = tcon->ses->server->ops->set_compression(
233 xid, tcon, pSMBFile);
234 cifs_dbg(FYI, "set compress flag rc %d\n", rc);
235 }
236 break;
237 case CIFS_IOC_COPYCHUNK_FILE:
238 rc = cifs_ioctl_copychunk(xid, filep, arg);
239 break;
240 case CIFS_QUERY_INFO:
241 rc = cifs_ioctl_query_info(xid, filep, arg);
242 break;
243 case CIFS_IOC_SET_INTEGRITY:
244 if (pSMBFile == NULL)
245 break;
246 tcon = tlink_tcon(pSMBFile->tlink);
247 if (tcon->ses->server->ops->set_integrity)
248 rc = tcon->ses->server->ops->set_integrity(xid,
249 tcon, pSMBFile);
250 else
251 rc = -EOPNOTSUPP;
252 break;
253 case CIFS_IOC_GET_MNT_INFO:
254 if (pSMBFile == NULL)
255 break;
256 tcon = tlink_tcon(pSMBFile->tlink);
257 rc = smb_mnt_get_fsinfo(xid, tcon, (void __user *)arg);
258 break;
259 case CIFS_ENUMERATE_SNAPSHOTS:
260 if (pSMBFile == NULL)
261 break;
262 if (arg == 0) {
263 rc = -EINVAL;
264 goto cifs_ioc_exit;
265 }
266 tcon = tlink_tcon(pSMBFile->tlink);
267 if (tcon->ses->server->ops->enum_snapshots)
268 rc = tcon->ses->server->ops->enum_snapshots(xid, tcon,
269 pSMBFile, (void __user *)arg);
270 else
271 rc = -EOPNOTSUPP;
272 break;
273 default:
274 cifs_dbg(FYI, "unsupported ioctl\n");
275 break;
276 }
277cifs_ioc_exit:
278 free_xid(xid);
279 return rc;
280}
281
