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Pavel Shilovskybe4cb9e2011-12-29 17:06:33 +04001/*
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,
Pavel Shilovskyca819832013-07-05 12:21:26 +040044 __u32 create_options, void *data, int command)
Pavel Shilovskybe4cb9e2011-12-29 17:06:33 +040045{
46 int rc, tmprc = 0;
Pavel Shilovskybe4cb9e2011-12-29 17:06:33 +040047 __le16 *utf16_path;
Pavel Shilovsky2e44b282012-09-18 16:20:33 -070048 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
Pavel Shilovsky064f6042013-07-09 18:20:30 +040049 struct cifs_open_parms oparms;
50 struct cifs_fid fid;
Pavel Shilovskybe4cb9e2011-12-29 17:06:33 +040051
52 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
53 if (!utf16_path)
54 return -ENOMEM;
55
Pavel Shilovsky064f6042013-07-09 18:20:30 +040056 oparms.tcon = tcon;
57 oparms.desired_access = desired_access;
58 oparms.disposition = create_disposition;
59 oparms.create_options = create_options;
60 oparms.fid = &fid;
Pavel Shilovsky9cbc0b72013-07-09 18:40:58 +040061 oparms.reconnect = false;
Pavel Shilovsky064f6042013-07-09 18:20:30 +040062
Pavel Shilovskyb42bf882013-08-14 19:25:21 +040063 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
Pavel Shilovskybe4cb9e2011-12-29 17:06:33 +040064 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:
Pavel Shilovsky064f6042013-07-09 18:20:30 +040073 tmprc = SMB2_query_info(xid, tcon, fid.persistent_fid,
74 fid.volatile_fid,
Pavel Shilovskybe4cb9e2011-12-29 17:06:33 +040075 (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;
Steve French897fba12016-05-12 21:20:36 -050083 case SMB2_OP_RMDIR:
84 tmprc = SMB2_rmdir(xid, tcon, fid.persistent_fid,
85 fid.volatile_fid);
86 break;
Pavel Shilovsky35143eb2012-09-18 16:20:31 -070087 case SMB2_OP_RENAME:
Pavel Shilovsky064f6042013-07-09 18:20:30 +040088 tmprc = SMB2_rename(xid, tcon, fid.persistent_fid,
89 fid.volatile_fid, (__le16 *)data);
Pavel Shilovsky35143eb2012-09-18 16:20:31 -070090 break;
Pavel Shilovsky568798c2012-09-18 16:20:31 -070091 case SMB2_OP_HARDLINK:
Pavel Shilovsky064f6042013-07-09 18:20:30 +040092 tmprc = SMB2_set_hardlink(xid, tcon, fid.persistent_fid,
93 fid.volatile_fid, (__le16 *)data);
Pavel Shilovsky568798c2012-09-18 16:20:31 -070094 break;
Pavel Shilovskyc839ff22012-09-18 16:20:32 -070095 case SMB2_OP_SET_EOF:
Pavel Shilovsky064f6042013-07-09 18:20:30 +040096 tmprc = SMB2_set_eof(xid, tcon, fid.persistent_fid,
97 fid.volatile_fid, current->tgid,
Steve Frenchf29ebb42014-07-19 21:44:58 -050098 (__le64 *)data, false);
Pavel Shilovskyc839ff22012-09-18 16:20:32 -070099 break;
Pavel Shilovsky1feeaac2012-09-18 16:20:32 -0700100 case SMB2_OP_SET_INFO:
Pavel Shilovsky064f6042013-07-09 18:20:30 +0400101 tmprc = SMB2_set_info(xid, tcon, fid.persistent_fid,
102 fid.volatile_fid,
Pavel Shilovsky1feeaac2012-09-18 16:20:32 -0700103 (FILE_BASIC_INFO *)data);
104 break;
Pavel Shilovskybe4cb9e2011-12-29 17:06:33 +0400105 default:
Joe Perchesf96637b2013-05-04 22:12:25 -0500106 cifs_dbg(VFS, "Invalid command\n");
Pavel Shilovskybe4cb9e2011-12-29 17:06:33 +0400107 break;
108 }
109
Pavel Shilovsky064f6042013-07-09 18:20:30 +0400110 rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
Pavel Shilovskybe4cb9e2011-12-29 17:06:33 +0400111 if (tmprc)
112 rc = tmprc;
113 kfree(utf16_path);
114 return rc;
115}
116
Pavel Shilovskyf0df7372012-09-18 16:20:26 -0700117void
Pavel Shilovskybe4cb9e2011-12-29 17:06:33 +0400118move_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,
Pavel Shilovskyeb85d94b2013-10-23 17:49:47 +0400130 FILE_ALL_INFO *data, bool *adjust_tz, bool *symlink)
Pavel Shilovskybe4cb9e2011-12-29 17:06:33 +0400131{
132 int rc;
133 struct smb2_file_all_info *smb2_data;
134
135 *adjust_tz = false;
Pavel Shilovskyeb85d94b2013-10-23 17:49:47 +0400136 *symlink = false;
Pavel Shilovskybe4cb9e2011-12-29 17:06:33 +0400137
Pavel Shilovsky1bbe4992014-08-22 13:32:11 +0400138 smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
Pavel Shilovskybe4cb9e2011-12-29 17:06:33 +0400139 GFP_KERNEL);
140 if (smb2_data == NULL)
141 return -ENOMEM;
142
143 rc = smb2_open_op_close(xid, tcon, cifs_sb, full_path,
Pavel Shilovskyeb85d94b2013-10-23 17:49:47 +0400144 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 }
Pavel Shilovskybe4cb9e2011-12-29 17:06:33 +0400154 if (rc)
155 goto out;
156
157 move_smb2_info_to_cifs(data, smb2_data);
158out:
159 kfree(smb2_data);
160 return rc;
161}
Pavel Shilovskya0e73182011-07-19 12:56:37 +0400162
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,
Pavel Shilovskyca819832013-07-05 12:21:26 +0400168 FILE_WRITE_ATTRIBUTES, FILE_CREATE,
Pavel Shilovskya0e73182011-07-19 12:56:37 +0400169 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,
Pavel Shilovskyca819832013-07-05 12:21:26 +0400187 FILE_WRITE_ATTRIBUTES, FILE_CREATE,
Pavel Shilovskya0e73182011-07-19 12:56:37 +0400188 CREATE_NOT_FILE, &data, SMB2_OP_SET_INFO);
189 if (tmprc == 0)
190 cifs_i->cifsAttrs = dosattrs;
191}
Pavel Shilovsky1a500f02012-07-10 16:14:38 +0400192
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,
Steve French897fba12016-05-12 21:20:36 -0500198 CREATE_NOT_FILE,
199 NULL, SMB2_OP_RMDIR);
Pavel Shilovsky1a500f02012-07-10 16:14:38 +0400200}
Pavel Shilovskycbe6f432012-09-18 16:20:25 -0700201
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,
Pavel Shilovskyb42bf882013-08-14 19:25:21 +0400207 CREATE_DELETE_ON_CLOSE | OPEN_REPARSE_POINT,
208 NULL, SMB2_OP_DELETE);
Pavel Shilovskycbe6f432012-09-18 16:20:25 -0700209}
Pavel Shilovsky35143eb2012-09-18 16:20:31 -0700210
Pavel Shilovsky568798c2012-09-18 16:20:31 -0700211static 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)
Pavel Shilovsky35143eb2012-09-18 16:20:31 -0700215{
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
Pavel Shilovsky568798c2012-09-18 16:20:31 -0700225 rc = smb2_open_op_close(xid, tcon, cifs_sb, from_name, access,
Pavel Shilovskyca819832013-07-05 12:21:26 +0400226 FILE_OPEN, 0, smb2_to_name, command);
Pavel Shilovsky35143eb2012-09-18 16:20:31 -0700227smb2_rename_path:
228 kfree(smb2_to_name);
229 return rc;
230}
Pavel Shilovsky568798c2012-09-18 16:20:31 -0700231
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}
Pavel Shilovskyc839ff22012-09-18 16:20:32 -0700249
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,
Pavel Shilovskyca819832013-07-05 12:21:26 +0400257 FILE_WRITE_DATA, FILE_OPEN, 0, &eof,
Pavel Shilovskyc839ff22012-09-18 16:20:32 -0700258 SMB2_OP_SET_EOF);
259}
Pavel Shilovsky1feeaac2012-09-18 16:20:32 -0700260
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 tlink = cifs_sb_tlink(cifs_sb);
270 if (IS_ERR(tlink))
271 return PTR_ERR(tlink);
272 rc = smb2_open_op_close(xid, tlink_tcon(tlink), cifs_sb, full_path,
Pavel Shilovskyca819832013-07-05 12:21:26 +0400273 FILE_WRITE_ATTRIBUTES, FILE_OPEN, 0, buf,
Pavel Shilovsky1feeaac2012-09-18 16:20:32 -0700274 SMB2_OP_SET_INFO);
275 cifs_put_tlink(tlink);
276 return rc;
277}