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Linux kernel mirror (for testing)
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kernel
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linux
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);
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)
127{
128 int rc;
129 struct smb2_file_all_info *smb2_data;
130
131 *adjust_tz = false;
132
133 smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + MAX_NAME * 2,
134 GFP_KERNEL);
135 if (smb2_data == NULL)
136 return -ENOMEM;
137
138 rc = smb2_open_op_close(xid, tcon, cifs_sb, full_path,
139 FILE_READ_ATTRIBUTES, FILE_OPEN,
140 OPEN_REPARSE_POINT, smb2_data,
141 SMB2_OP_QUERY_INFO);
142 if (rc)
143 goto out;
144
145 move_smb2_info_to_cifs(data, smb2_data);
146out:
147 kfree(smb2_data);
148 return rc;
149}
150
151int
152smb2_mkdir(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
153 struct cifs_sb_info *cifs_sb)
154{
155 return smb2_open_op_close(xid, tcon, cifs_sb, name,
156 FILE_WRITE_ATTRIBUTES, FILE_CREATE,
157 CREATE_NOT_FILE, NULL, SMB2_OP_MKDIR);
158}
159
160void
161smb2_mkdir_setinfo(struct inode *inode, const char *name,
162 struct cifs_sb_info *cifs_sb, struct cifs_tcon *tcon,
163 const unsigned int xid)
164{
165 FILE_BASIC_INFO data;
166 struct cifsInodeInfo *cifs_i;
167 u32 dosattrs;
168 int tmprc;
169
170 memset(&data, 0, sizeof(data));
171 cifs_i = CIFS_I(inode);
172 dosattrs = cifs_i->cifsAttrs | ATTR_READONLY;
173 data.Attributes = cpu_to_le32(dosattrs);
174 tmprc = smb2_open_op_close(xid, tcon, cifs_sb, name,
175 FILE_WRITE_ATTRIBUTES, FILE_CREATE,
176 CREATE_NOT_FILE, &data, SMB2_OP_SET_INFO);
177 if (tmprc == 0)
178 cifs_i->cifsAttrs = dosattrs;
179}
180
181int
182smb2_rmdir(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
183 struct cifs_sb_info *cifs_sb)
184{
185 return smb2_open_op_close(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
186 CREATE_NOT_FILE | CREATE_DELETE_ON_CLOSE,
187 NULL, SMB2_OP_DELETE);
188}
189
190int
191smb2_unlink(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
192 struct cifs_sb_info *cifs_sb)
193{
194 return smb2_open_op_close(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
195 CREATE_DELETE_ON_CLOSE | OPEN_REPARSE_POINT,
196 NULL, SMB2_OP_DELETE);
197}
198
199static int
200smb2_set_path_attr(const unsigned int xid, struct cifs_tcon *tcon,
201 const char *from_name, const char *to_name,
202 struct cifs_sb_info *cifs_sb, __u32 access, int command)
203{
204 __le16 *smb2_to_name = NULL;
205 int rc;
206
207 smb2_to_name = cifs_convert_path_to_utf16(to_name, cifs_sb);
208 if (smb2_to_name == NULL) {
209 rc = -ENOMEM;
210 goto smb2_rename_path;
211 }
212
213 rc = smb2_open_op_close(xid, tcon, cifs_sb, from_name, access,
214 FILE_OPEN, 0, smb2_to_name, command);
215smb2_rename_path:
216 kfree(smb2_to_name);
217 return rc;
218}
219
220int
221smb2_rename_path(const unsigned int xid, struct cifs_tcon *tcon,
222 const char *from_name, const char *to_name,
223 struct cifs_sb_info *cifs_sb)
224{
225 return smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb,
226 DELETE, SMB2_OP_RENAME);
227}
228
229int
230smb2_create_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
231 const char *from_name, const char *to_name,
232 struct cifs_sb_info *cifs_sb)
233{
234 return smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb,
235 FILE_READ_ATTRIBUTES, SMB2_OP_HARDLINK);
236}
237
238int
239smb2_set_path_size(const unsigned int xid, struct cifs_tcon *tcon,
240 const char *full_path, __u64 size,
241 struct cifs_sb_info *cifs_sb, bool set_alloc)
242{
243 __le64 eof = cpu_to_le64(size);
244 return smb2_open_op_close(xid, tcon, cifs_sb, full_path,
245 FILE_WRITE_DATA, FILE_OPEN, 0, &eof,
246 SMB2_OP_SET_EOF);
247}
248
249int
250smb2_set_file_info(struct inode *inode, const char *full_path,
251 FILE_BASIC_INFO *buf, const unsigned int xid)
252{
253 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
254 struct tcon_link *tlink;
255 int rc;
256
257 tlink = cifs_sb_tlink(cifs_sb);
258 if (IS_ERR(tlink))
259 return PTR_ERR(tlink);
260 rc = smb2_open_op_close(xid, tlink_tcon(tlink), cifs_sb, full_path,
261 FILE_WRITE_ATTRIBUTES, FILE_OPEN, 0, buf,
262 SMB2_OP_SET_INFO);
263 cifs_put_tlink(tlink);
264 return rc;
265}