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1/*
2 * fs/cifs/smb2inode.c
3 *
4 * Copyright (C) International Business Machines Corp., 2002, 2011
5 * Etersoft, 2012
6 * Author(s): Pavel Shilovsky (pshilovsky@samba.org),
7 * 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#include <linux/fs.h>
24#include <linux/stat.h>
25#include <linux/slab.h>
26#include <linux/pagemap.h>
27#include <asm/div64.h>
28#include "cifsfs.h"
29#include "cifspdu.h"
30#include "cifsglob.h"
31#include "cifsproto.h"
32#include "cifs_debug.h"
33#include "cifs_fs_sb.h"
34#include "cifs_unicode.h"
35#include "fscache.h"
36#include "smb2glob.h"
37#include "smb2pdu.h"
38#include "smb2proto.h"
39
40static int
41smb2_open_op_close(const unsigned int xid, struct cifs_tcon *tcon,
42 struct cifs_sb_info *cifs_sb, const char *full_path,
43 __u32 desired_access, __u32 create_disposition,
44 __u32 create_options, void *data, int command)
45{
46 int rc, tmprc = 0;
47 __le16 *utf16_path;
48 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
49 struct cifs_open_parms oparms;
50 struct cifs_fid fid;
51
52 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
53 if (!utf16_path)
54 return -ENOMEM;
55
56 oparms.tcon = tcon;
57 oparms.desired_access = desired_access;
58 oparms.disposition = create_disposition;
59 oparms.create_options = create_options;
60 oparms.fid = &fid;
61 oparms.reconnect = false;
62
63 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
64 if (rc) {
65 kfree(utf16_path);
66 return rc;
67 }
68
69 switch (command) {
70 case SMB2_OP_DELETE:
71 break;
72 case SMB2_OP_QUERY_INFO:
73 tmprc = SMB2_query_info(xid, tcon, fid.persistent_fid,
74 fid.volatile_fid,
75 (struct smb2_file_all_info *)data);
76 break;
77 case SMB2_OP_MKDIR:
78 /*
79 * Directories are created through parameters in the
80 * SMB2_open() call.
81 */
82 break;
83 case SMB2_OP_RENAME:
84 tmprc = SMB2_rename(xid, tcon, fid.persistent_fid,
85 fid.volatile_fid, (__le16 *)data);
86 break;
87 case SMB2_OP_HARDLINK:
88 tmprc = SMB2_set_hardlink(xid, tcon, fid.persistent_fid,
89 fid.volatile_fid, (__le16 *)data);
90 break;
91 case SMB2_OP_SET_EOF:
92 tmprc = SMB2_set_eof(xid, tcon, fid.persistent_fid,
93 fid.volatile_fid, current->tgid,
94 (__le64 *)data, false);
95 break;
96 case SMB2_OP_SET_INFO:
97 tmprc = SMB2_set_info(xid, tcon, fid.persistent_fid,
98 fid.volatile_fid,
99 (FILE_BASIC_INFO *)data);
100 break;
101 default:
102 cifs_dbg(VFS, "Invalid command\n");
103 break;
104 }
105
106 rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
107 if (tmprc)
108 rc = tmprc;
109 kfree(utf16_path);
110 return rc;
111}
112
113void
114move_smb2_info_to_cifs(FILE_ALL_INFO *dst, struct smb2_file_all_info *src)
115{
116 memcpy(dst, src, (size_t)(&src->CurrentByteOffset) - (size_t)src);
117 dst->CurrentByteOffset = src->CurrentByteOffset;
118 dst->Mode = src->Mode;
119 dst->AlignmentRequirement = src->AlignmentRequirement;
120 dst->IndexNumber1 = 0; /* we don't use it */
121}
122
123int
124smb2_query_path_info(const unsigned int xid, struct cifs_tcon *tcon,
125 struct cifs_sb_info *cifs_sb, const char *full_path,
126 FILE_ALL_INFO *data, bool *adjust_tz, bool *symlink)
127{
128 int rc;
129 struct smb2_file_all_info *smb2_data;
130
131 *adjust_tz = false;
132 *symlink = false;
133
134 smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
135 GFP_KERNEL);
136 if (smb2_data == NULL)
137 return -ENOMEM;
138
139 rc = smb2_open_op_close(xid, tcon, cifs_sb, full_path,
140 FILE_READ_ATTRIBUTES, FILE_OPEN, 0,
141 smb2_data, SMB2_OP_QUERY_INFO);
142 if (rc == -EOPNOTSUPP) {
143 *symlink = true;
144 /* Failed on a symbolic link - query a reparse point info */
145 rc = smb2_open_op_close(xid, tcon, cifs_sb, full_path,
146 FILE_READ_ATTRIBUTES, FILE_OPEN,
147 OPEN_REPARSE_POINT, smb2_data,
148 SMB2_OP_QUERY_INFO);
149 }
150 if (rc)
151 goto out;
152
153 move_smb2_info_to_cifs(data, smb2_data);
154out:
155 kfree(smb2_data);
156 return rc;
157}
158
159int
160smb2_mkdir(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
161 struct cifs_sb_info *cifs_sb)
162{
163 return smb2_open_op_close(xid, tcon, cifs_sb, name,
164 FILE_WRITE_ATTRIBUTES, FILE_CREATE,
165 CREATE_NOT_FILE, NULL, SMB2_OP_MKDIR);
166}
167
168void
169smb2_mkdir_setinfo(struct inode *inode, const char *name,
170 struct cifs_sb_info *cifs_sb, struct cifs_tcon *tcon,
171 const unsigned int xid)
172{
173 FILE_BASIC_INFO data;
174 struct cifsInodeInfo *cifs_i;
175 u32 dosattrs;
176 int tmprc;
177
178 memset(&data, 0, sizeof(data));
179 cifs_i = CIFS_I(inode);
180 dosattrs = cifs_i->cifsAttrs | ATTR_READONLY;
181 data.Attributes = cpu_to_le32(dosattrs);
182 tmprc = smb2_open_op_close(xid, tcon, cifs_sb, name,
183 FILE_WRITE_ATTRIBUTES, FILE_CREATE,
184 CREATE_NOT_FILE, &data, SMB2_OP_SET_INFO);
185 if (tmprc == 0)
186 cifs_i->cifsAttrs = dosattrs;
187}
188
189int
190smb2_rmdir(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
191 struct cifs_sb_info *cifs_sb)
192{
193 return smb2_open_op_close(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
194 CREATE_NOT_FILE | CREATE_DELETE_ON_CLOSE,
195 NULL, SMB2_OP_DELETE);
196}
197
198int
199smb2_unlink(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
200 struct cifs_sb_info *cifs_sb)
201{
202 return smb2_open_op_close(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
203 CREATE_DELETE_ON_CLOSE | OPEN_REPARSE_POINT,
204 NULL, SMB2_OP_DELETE);
205}
206
207static int
208smb2_set_path_attr(const unsigned int xid, struct cifs_tcon *tcon,
209 const char *from_name, const char *to_name,
210 struct cifs_sb_info *cifs_sb, __u32 access, int command)
211{
212 __le16 *smb2_to_name = NULL;
213 int rc;
214
215 smb2_to_name = cifs_convert_path_to_utf16(to_name, cifs_sb);
216 if (smb2_to_name == NULL) {
217 rc = -ENOMEM;
218 goto smb2_rename_path;
219 }
220
221 rc = smb2_open_op_close(xid, tcon, cifs_sb, from_name, access,
222 FILE_OPEN, 0, smb2_to_name, command);
223smb2_rename_path:
224 kfree(smb2_to_name);
225 return rc;
226}
227
228int
229smb2_rename_path(const unsigned int xid, struct cifs_tcon *tcon,
230 const char *from_name, const char *to_name,
231 struct cifs_sb_info *cifs_sb)
232{
233 return smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb,
234 DELETE, SMB2_OP_RENAME);
235}
236
237int
238smb2_create_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
239 const char *from_name, const char *to_name,
240 struct cifs_sb_info *cifs_sb)
241{
242 return smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb,
243 FILE_READ_ATTRIBUTES, SMB2_OP_HARDLINK);
244}
245
246int
247smb2_set_path_size(const unsigned int xid, struct cifs_tcon *tcon,
248 const char *full_path, __u64 size,
249 struct cifs_sb_info *cifs_sb, bool set_alloc)
250{
251 __le64 eof = cpu_to_le64(size);
252 return smb2_open_op_close(xid, tcon, cifs_sb, full_path,
253 FILE_WRITE_DATA, FILE_OPEN, 0, &eof,
254 SMB2_OP_SET_EOF);
255}
256
257int
258smb2_set_file_info(struct inode *inode, const char *full_path,
259 FILE_BASIC_INFO *buf, const unsigned int xid)
260{
261 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
262 struct tcon_link *tlink;
263 int rc;
264
265 tlink = cifs_sb_tlink(cifs_sb);
266 if (IS_ERR(tlink))
267 return PTR_ERR(tlink);
268 rc = smb2_open_op_close(xid, tlink_tcon(tlink), cifs_sb, full_path,
269 FILE_WRITE_ATTRIBUTES, FILE_OPEN, 0, buf,
270 SMB2_OP_SET_INFO);
271 cifs_put_tlink(tlink);
272 return rc;
273}