Loading...
Note: File does not exist in v3.5.6.
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_RMDIR:
84 tmprc = SMB2_rmdir(xid, tcon, fid.persistent_fid,
85 fid.volatile_fid);
86 break;
87 case SMB2_OP_RENAME:
88 tmprc = SMB2_rename(xid, tcon, fid.persistent_fid,
89 fid.volatile_fid, (__le16 *)data);
90 break;
91 case SMB2_OP_HARDLINK:
92 tmprc = SMB2_set_hardlink(xid, tcon, fid.persistent_fid,
93 fid.volatile_fid, (__le16 *)data);
94 break;
95 case SMB2_OP_SET_EOF:
96 tmprc = SMB2_set_eof(xid, tcon, fid.persistent_fid,
97 fid.volatile_fid, current->tgid,
98 (__le64 *)data, false);
99 break;
100 case SMB2_OP_SET_INFO:
101 tmprc = SMB2_set_info(xid, tcon, fid.persistent_fid,
102 fid.volatile_fid,
103 (FILE_BASIC_INFO *)data);
104 break;
105 default:
106 cifs_dbg(VFS, "Invalid command\n");
107 break;
108 }
109
110 rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
111 if (tmprc)
112 rc = tmprc;
113 kfree(utf16_path);
114 return rc;
115}
116
117void
118move_smb2_info_to_cifs(FILE_ALL_INFO *dst, struct smb2_file_all_info *src)
119{
120 memcpy(dst, src, (size_t)(&src->CurrentByteOffset) - (size_t)src);
121 dst->CurrentByteOffset = src->CurrentByteOffset;
122 dst->Mode = src->Mode;
123 dst->AlignmentRequirement = src->AlignmentRequirement;
124 dst->IndexNumber1 = 0; /* we don't use it */
125}
126
127int
128smb2_query_path_info(const unsigned int xid, struct cifs_tcon *tcon,
129 struct cifs_sb_info *cifs_sb, const char *full_path,
130 FILE_ALL_INFO *data, bool *adjust_tz, bool *symlink)
131{
132 int rc;
133 struct smb2_file_all_info *smb2_data;
134
135 *adjust_tz = false;
136 *symlink = false;
137
138 smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
139 GFP_KERNEL);
140 if (smb2_data == NULL)
141 return -ENOMEM;
142
143 rc = smb2_open_op_close(xid, tcon, cifs_sb, full_path,
144 FILE_READ_ATTRIBUTES, FILE_OPEN, 0,
145 smb2_data, SMB2_OP_QUERY_INFO);
146 if (rc == -EOPNOTSUPP) {
147 *symlink = true;
148 /* Failed on a symbolic link - query a reparse point info */
149 rc = smb2_open_op_close(xid, tcon, cifs_sb, full_path,
150 FILE_READ_ATTRIBUTES, FILE_OPEN,
151 OPEN_REPARSE_POINT, smb2_data,
152 SMB2_OP_QUERY_INFO);
153 }
154 if (rc)
155 goto out;
156
157 move_smb2_info_to_cifs(data, smb2_data);
158out:
159 kfree(smb2_data);
160 return rc;
161}
162
163int
164smb2_mkdir(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
165 struct cifs_sb_info *cifs_sb)
166{
167 return smb2_open_op_close(xid, tcon, cifs_sb, name,
168 FILE_WRITE_ATTRIBUTES, FILE_CREATE,
169 CREATE_NOT_FILE, NULL, SMB2_OP_MKDIR);
170}
171
172void
173smb2_mkdir_setinfo(struct inode *inode, const char *name,
174 struct cifs_sb_info *cifs_sb, struct cifs_tcon *tcon,
175 const unsigned int xid)
176{
177 FILE_BASIC_INFO data;
178 struct cifsInodeInfo *cifs_i;
179 u32 dosattrs;
180 int tmprc;
181
182 memset(&data, 0, sizeof(data));
183 cifs_i = CIFS_I(inode);
184 dosattrs = cifs_i->cifsAttrs | ATTR_READONLY;
185 data.Attributes = cpu_to_le32(dosattrs);
186 tmprc = smb2_open_op_close(xid, tcon, cifs_sb, name,
187 FILE_WRITE_ATTRIBUTES, FILE_CREATE,
188 CREATE_NOT_FILE, &data, SMB2_OP_SET_INFO);
189 if (tmprc == 0)
190 cifs_i->cifsAttrs = dosattrs;
191}
192
193int
194smb2_rmdir(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
195 struct cifs_sb_info *cifs_sb)
196{
197 return smb2_open_op_close(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
198 CREATE_NOT_FILE,
199 NULL, SMB2_OP_RMDIR);
200}
201
202int
203smb2_unlink(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
204 struct cifs_sb_info *cifs_sb)
205{
206 return smb2_open_op_close(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
207 CREATE_DELETE_ON_CLOSE | OPEN_REPARSE_POINT,
208 NULL, SMB2_OP_DELETE);
209}
210
211static int
212smb2_set_path_attr(const unsigned int xid, struct cifs_tcon *tcon,
213 const char *from_name, const char *to_name,
214 struct cifs_sb_info *cifs_sb, __u32 access, int command)
215{
216 __le16 *smb2_to_name = NULL;
217 int rc;
218
219 smb2_to_name = cifs_convert_path_to_utf16(to_name, cifs_sb);
220 if (smb2_to_name == NULL) {
221 rc = -ENOMEM;
222 goto smb2_rename_path;
223 }
224
225 rc = smb2_open_op_close(xid, tcon, cifs_sb, from_name, access,
226 FILE_OPEN, 0, smb2_to_name, command);
227smb2_rename_path:
228 kfree(smb2_to_name);
229 return rc;
230}
231
232int
233smb2_rename_path(const unsigned int xid, struct cifs_tcon *tcon,
234 const char *from_name, const char *to_name,
235 struct cifs_sb_info *cifs_sb)
236{
237 return smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb,
238 DELETE, SMB2_OP_RENAME);
239}
240
241int
242smb2_create_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
243 const char *from_name, const char *to_name,
244 struct cifs_sb_info *cifs_sb)
245{
246 return smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb,
247 FILE_READ_ATTRIBUTES, SMB2_OP_HARDLINK);
248}
249
250int
251smb2_set_path_size(const unsigned int xid, struct cifs_tcon *tcon,
252 const char *full_path, __u64 size,
253 struct cifs_sb_info *cifs_sb, bool set_alloc)
254{
255 __le64 eof = cpu_to_le64(size);
256 return smb2_open_op_close(xid, tcon, cifs_sb, full_path,
257 FILE_WRITE_DATA, FILE_OPEN, 0, &eof,
258 SMB2_OP_SET_EOF);
259}
260
261int
262smb2_set_file_info(struct inode *inode, const char *full_path,
263 FILE_BASIC_INFO *buf, const unsigned int xid)
264{
265 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
266 struct tcon_link *tlink;
267 int rc;
268
269 if ((buf->CreationTime == 0) && (buf->LastAccessTime == 0) &&
270 (buf->LastWriteTime == 0) && (buf->ChangeTime) &&
271 (buf->Attributes == 0))
272 return 0; /* would be a no op, no sense sending this */
273
274 tlink = cifs_sb_tlink(cifs_sb);
275 if (IS_ERR(tlink))
276 return PTR_ERR(tlink);
277
278 rc = smb2_open_op_close(xid, tlink_tcon(tlink), cifs_sb, full_path,
279 FILE_WRITE_ATTRIBUTES, FILE_OPEN, 0, buf,
280 SMB2_OP_SET_INFO);
281 cifs_put_tlink(tlink);
282 return rc;
283}