CIFS: Query SMB2 inode info
[linux-3.10.git] / fs / cifs / smb2inode.c
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
40 static int
41 smb2_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 file_attributes, __u32 create_options,
45                    void *data, int command)
46 {
47         int rc, tmprc = 0;
48         u64 persistent_fid, volatile_fid;
49         __le16 *utf16_path;
50
51         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
52         if (!utf16_path)
53                 return -ENOMEM;
54
55         rc = SMB2_open(xid, tcon, utf16_path, &persistent_fid, &volatile_fid,
56                        desired_access, create_disposition, file_attributes,
57                        create_options);
58         if (rc) {
59                 kfree(utf16_path);
60                 return rc;
61         }
62
63         switch (command) {
64         case SMB2_OP_DELETE:
65                 break;
66         case SMB2_OP_QUERY_INFO:
67                 tmprc = SMB2_query_info(xid, tcon, persistent_fid,
68                                         volatile_fid,
69                                         (struct smb2_file_all_info *)data);
70                 break;
71         case SMB2_OP_MKDIR:
72                 /*
73                  * Directories are created through parameters in the
74                  * SMB2_open() call.
75                  */
76                 break;
77         default:
78                 cERROR(1, "Invalid command");
79                 break;
80         }
81
82         rc = SMB2_close(xid, tcon, persistent_fid, volatile_fid);
83         if (tmprc)
84                 rc = tmprc;
85         kfree(utf16_path);
86         return rc;
87 }
88
89 static void
90 move_smb2_info_to_cifs(FILE_ALL_INFO *dst, struct smb2_file_all_info *src)
91 {
92         memcpy(dst, src, (size_t)(&src->CurrentByteOffset) - (size_t)src);
93         dst->CurrentByteOffset = src->CurrentByteOffset;
94         dst->Mode = src->Mode;
95         dst->AlignmentRequirement = src->AlignmentRequirement;
96         dst->IndexNumber1 = 0; /* we don't use it */
97 }
98
99 int
100 smb2_query_path_info(const unsigned int xid, struct cifs_tcon *tcon,
101                      struct cifs_sb_info *cifs_sb, const char *full_path,
102                      FILE_ALL_INFO *data, bool *adjust_tz)
103 {
104         int rc;
105         struct smb2_file_all_info *smb2_data;
106
107         *adjust_tz = false;
108
109         smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + MAX_NAME * 2,
110                             GFP_KERNEL);
111         if (smb2_data == NULL)
112                 return -ENOMEM;
113
114         rc = smb2_open_op_close(xid, tcon, cifs_sb, full_path,
115                                 FILE_READ_ATTRIBUTES, FILE_OPEN, 0, 0,
116                                 smb2_data, SMB2_OP_QUERY_INFO);
117         if (rc)
118                 goto out;
119
120         move_smb2_info_to_cifs(data, smb2_data);
121 out:
122         kfree(smb2_data);
123         return rc;
124 }