blob: 76ddd98b6298d178cf258c7db2e17943477c5366 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * fs/cifs/ioctl.c
3 *
4 * vfs operations that deal with io control
5 *
Steve French64a5cfa2013-10-14 15:31:32 -05006 * Copyright (C) International Business Machines Corp., 2005,2013
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 * 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 */
Steve Frenchf654bac2005-04-28 22:41:04 -070023
Linus Torvalds1da177e2005-04-16 15:20:36 -070024#include <linux/fs.h>
Steve French41c13582013-11-14 00:05:36 -060025#include <linux/file.h>
26#include <linux/mount.h>
27#include <linux/mm.h>
28#include <linux/pagemap.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070029#include "cifspdu.h"
30#include "cifsglob.h"
31#include "cifsproto.h"
32#include "cifs_debug.h"
Steve Frenchc67593a2005-04-28 22:41:04 -070033#include "cifsfs.h"
Steve French0de1f4c2015-07-04 18:40:10 -050034#include "cifs_ioctl.h"
Ronnie Sahlberg8d8b26e2018-10-17 05:47:58 +100035#include "smb2proto.h"
Steve French02b16662015-06-27 21:18:36 -070036#include <linux/btrfs.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070037
Ronnie Sahlbergf5b05d62018-10-07 19:19:58 -050038static long cifs_ioctl_query_info(unsigned int xid, struct file *filep,
39 unsigned long p)
40{
Ronnie Sahlberg8d8b26e2018-10-17 05:47:58 +100041 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;
Ronnie Sahlbergf5b05d62018-10-07 19:19:58 -050048
Ronnie Sahlberg8d8b26e2018-10-17 05:47:58 +100049 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 }
Ronnie Sahlbergf5b05d62018-10-07 19:19:58 -050065
66 if (tcon->ses->server->ops->ioctl_query_info)
Ronnie Sahlberg8d8b26e2018-10-17 05:47:58 +100067 rc = tcon->ses->server->ops->ioctl_query_info(
68 xid, tcon, utf16_path,
69 filep->private_data ? 0 : 1, p);
Ronnie Sahlbergf5b05d62018-10-07 19:19:58 -050070 else
Ronnie Sahlberg8d8b26e2018-10-17 05:47:58 +100071 rc = -EOPNOTSUPP;
72
73 ici_exit:
74 if (utf16_path != &root_path)
75 kfree(utf16_path);
76 kfree(path);
77 return rc;
Ronnie Sahlbergf5b05d62018-10-07 19:19:58 -050078}
79
Sachin Prabhu312bbc52017-04-04 02:12:04 -050080static long cifs_ioctl_copychunk(unsigned int xid, struct file *dst_file,
Christoph Hellwig04b38d62015-12-03 12:59:50 +010081 unsigned long srcfd)
Steve French41c13582013-11-14 00:05:36 -060082{
83 int rc;
Steve French41c13582013-11-14 00:05:36 -060084 struct fd src_file;
Steve French41c13582013-11-14 00:05:36 -060085 struct inode *src_inode;
Steve French41c13582013-11-14 00:05:36 -060086
Sachin Prabhu312bbc52017-04-04 02:12:04 -050087 cifs_dbg(FYI, "ioctl copychunk range\n");
Steve French41c13582013-11-14 00:05:36 -060088 /* 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
Jann Horn4c17a6d2015-09-11 16:27:27 +0200107 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
Libo Chen2d4f84b2013-12-11 11:02:27 +0800113 src_inode = file_inode(src_file.file);
Al Viro378ff1a2015-01-18 23:37:32 -0500114 rc = -EINVAL;
115 if (S_ISDIR(src_inode->i_mode))
116 goto out_fput;
Steve French41c13582013-11-14 00:05:36 -0600117
Sachin Prabhu620d8742017-02-10 16:03:51 +0530118 rc = cifs_file_copychunk_range(xid, src_file.file, 0, dst_file, 0,
119 src_inode->i_size, 0);
Sachin Prabhu7d0c2342017-04-26 17:10:17 +0100120 if (rc > 0)
121 rc = 0;
Steve French41c13582013-11-14 00:05:36 -0600122out_fput:
123 fdput(src_file);
124out_drop_write:
125 mnt_drop_write_file(dst_file);
126 return rc;
127}
128
Steve French0de1f4c2015-07-04 18:40:10 -0500129static 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);
Steve French0de1f4c2015-07-04 18:40:10 -0500147 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;
Steve French0de1f4c2015-07-04 18:40:10 -0500155 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
Steve Frenchf9ddcca2008-05-15 05:51:55 +0000164long cifs_ioctl(struct file *filep, unsigned int command, unsigned long arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165{
Al Viro496ad9a2013-01-23 17:07:38 -0500166 struct inode *inode = file_inode(filep);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167 int rc = -ENOTTY; /* strange error - but the precedent */
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +0400168 unsigned int xid;
Jeff Laytonba00ba642010-09-20 16:01:31 -0700169 struct cifsFileInfo *pSMBFile = filep->private_data;
Steve French96daf2b2011-05-27 04:34:02 +0000170 struct cifs_tcon *tcon;
Steve Frenchf654bac2005-04-28 22:41:04 -0700171 __u64 ExtAttrBits = 0;
Jeff Layton61876392010-11-08 07:28:32 -0500172 __u64 caps;
Steve Frenchf654bac2005-04-28 22:41:04 -0700173
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +0400174 xid = get_xid();
Steve Frenchf654bac2005-04-28 22:41:04 -0700175
Pavel Shilovskyb0a752b2016-11-16 15:17:15 -0800176 cifs_dbg(FYI, "cifs ioctl 0x%x\n", command);
Steve French5fdae1f2007-06-05 18:30:44 +0000177 switch (command) {
David Howells36695672006-08-29 19:06:16 +0100178 case FS_IOC_GETFLAGS:
Jeff Layton61876392010-11-08 07:28:32 -0500179 if (pSMBFile == NULL)
180 break;
181 tcon = tlink_tcon(pSMBFile->tlink);
182 caps = le64_to_cpu(tcon->fsUnixInfo.Capability);
Steve French64a5cfa2013-10-14 15:31:32 -0500183#ifdef CONFIG_CIFS_POSIX
Steve French5fdae1f2007-06-05 18:30:44 +0000184 if (CIFS_UNIX_EXTATTR_CAP & caps) {
Steve Frenchf10d9ba2013-10-13 22:32:30 -0500185 __u64 ExtAttrMask = 0;
Pavel Shilovsky4b4de762012-09-18 16:20:26 -0700186 rc = CIFSGetExtAttr(xid, tcon,
187 pSMBFile->fid.netfid,
188 &ExtAttrBits, &ExtAttrMask);
Steve French5fdae1f2007-06-05 18:30:44 +0000189 if (rc == 0)
Steve Frenchf654bac2005-04-28 22:41:04 -0700190 rc = put_user(ExtAttrBits &
David Howells36695672006-08-29 19:06:16 +0100191 FS_FL_USER_VISIBLE,
Steve Frenchf654bac2005-04-28 22:41:04 -0700192 (int __user *)arg);
Steve French64a5cfa2013-10-14 15:31:32 -0500193 if (rc != EOPNOTSUPP)
194 break;
195 }
196#endif /* CONFIG_CIFS_POSIX */
197 rc = 0;
198 if (CIFS_I(inode)->cifsAttrs & ATTR_COMPRESSED) {
199 /* add in the compressed bit */
200 ExtAttrBits = FS_COMPR_FL;
201 rc = put_user(ExtAttrBits & FS_FL_USER_VISIBLE,
202 (int __user *)arg);
Steve Frenchf654bac2005-04-28 22:41:04 -0700203 }
204 break;
David Howells36695672006-08-29 19:06:16 +0100205 case FS_IOC_SETFLAGS:
Jeff Layton61876392010-11-08 07:28:32 -0500206 if (pSMBFile == NULL)
207 break;
208 tcon = tlink_tcon(pSMBFile->tlink);
209 caps = le64_to_cpu(tcon->fsUnixInfo.Capability);
Steve French64a5cfa2013-10-14 15:31:32 -0500210
211 if (get_user(ExtAttrBits, (int __user *)arg)) {
212 rc = -EFAULT;
213 break;
Steve Frenchf654bac2005-04-28 22:41:04 -0700214 }
Steve French64a5cfa2013-10-14 15:31:32 -0500215
216 /*
217 * if (CIFS_UNIX_EXTATTR_CAP & caps)
218 * rc = CIFSSetExtAttr(xid, tcon,
219 * pSMBFile->fid.netfid,
220 * extAttrBits,
221 * &ExtAttrMask);
222 * if (rc != EOPNOTSUPP)
223 * break;
224 */
225
226 /* Currently only flag we can set is compressed flag */
227 if ((ExtAttrBits & FS_COMPR_FL) == 0)
228 break;
229
230 /* Try to set compress flag */
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 }
Steve Frenchf654bac2005-04-28 22:41:04 -0700236 break;
Steve Frenchf19e84d2013-11-24 21:53:17 -0600237 case CIFS_IOC_COPYCHUNK_FILE:
Sachin Prabhu312bbc52017-04-04 02:12:04 -0500238 rc = cifs_ioctl_copychunk(xid, filep, arg);
Steve French41c13582013-11-14 00:05:36 -0600239 break;
Ronnie Sahlbergf5b05d62018-10-07 19:19:58 -0500240 case CIFS_QUERY_INFO:
241 rc = cifs_ioctl_query_info(xid, filep, arg);
242 break;
Steve Frenchb3152e22015-06-24 03:17:02 -0500243 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;
Steve French0de1f4c2015-07-04 18:40:10 -0500253 case CIFS_IOC_GET_MNT_INFO:
David Disseldorpd8a6e502017-05-04 00:41:13 +0200254 if (pSMBFile == NULL)
255 break;
Steve French0de1f4c2015-07-04 18:40:10 -0500256 tcon = tlink_tcon(pSMBFile->tlink);
257 rc = smb_mnt_get_fsinfo(xid, tcon, (void __user *)arg);
258 break;
Steve French834170c2016-09-30 21:14:26 -0500259 case CIFS_ENUMERATE_SNAPSHOTS:
David Disseldorp6026685d2017-05-03 17:39:08 +0200260 if (pSMBFile == NULL)
261 break;
Steve French834170c2016-09-30 21:14:26 -0500262 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273 default:
Joe Perchesf96637b2013-05-04 22:12:25 -0500274 cifs_dbg(FYI, "unsupported ioctl\n");
Steve Frenchf28ac912005-04-28 22:41:07 -0700275 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700276 }
Steve French834170c2016-09-30 21:14:26 -0500277cifs_ioc_exit:
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +0400278 free_xid(xid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279 return rc;
Steve French5fdae1f2007-06-05 18:30:44 +0000280}