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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 = NULL;
48 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
49 struct cifs_open_parms oparms;
50 struct cifs_fid fid;
51 bool use_cached_root_handle = false;
52
53 if ((strcmp(full_path, "") == 0) && (create_options == 0) &&
54 (desired_access == FILE_READ_ATTRIBUTES) &&
55 (create_disposition == FILE_OPEN) &&
56 (tcon->nohandlecache == false)) {
57 rc = open_shroot(xid, tcon, &fid);
58 if (rc == 0)
59 use_cached_root_handle = true;
60 }
61
62 if (use_cached_root_handle == false) {
63 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
64 if (!utf16_path)
65 return -ENOMEM;
66
67 oparms.tcon = tcon;
68 oparms.desired_access = desired_access;
69 oparms.disposition = create_disposition;
70 oparms.create_options = create_options;
71 oparms.fid = &fid;
72 oparms.reconnect = false;
73
74 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL,
75 NULL);
76 if (rc) {
77 kfree(utf16_path);
78 return rc;
79 }
80 }
81
82 switch (command) {
83 case SMB2_OP_DELETE:
84 break;
85 case SMB2_OP_QUERY_INFO:
86 tmprc = SMB2_query_info(xid, tcon, fid.persistent_fid,
87 fid.volatile_fid,
88 (struct smb2_file_all_info *)data);
89 break;
90 case SMB2_OP_MKDIR:
91
92
93
94
95 break;
96 case SMB2_OP_RMDIR:
97 tmprc = SMB2_rmdir(xid, tcon, fid.persistent_fid,
98 fid.volatile_fid);
99 break;
100 case SMB2_OP_RENAME:
101 tmprc = SMB2_rename(xid, tcon, fid.persistent_fid,
102 fid.volatile_fid, (__le16 *)data);
103 break;
104 case SMB2_OP_HARDLINK:
105 tmprc = SMB2_set_hardlink(xid, tcon, fid.persistent_fid,
106 fid.volatile_fid, (__le16 *)data);
107 break;
108 case SMB2_OP_SET_EOF:
109 tmprc = SMB2_set_eof(xid, tcon, fid.persistent_fid,
110 fid.volatile_fid, current->tgid,
111 (__le64 *)data, false);
112 break;
113 case SMB2_OP_SET_INFO:
114 tmprc = SMB2_set_info(xid, tcon, fid.persistent_fid,
115 fid.volatile_fid,
116 (FILE_BASIC_INFO *)data);
117 break;
118 default:
119 cifs_dbg(VFS, "Invalid command\n");
120 break;
121 }
122
123 if (use_cached_root_handle)
124 close_shroot(&tcon->crfid);
125 else
126 rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
127 if (tmprc)
128 rc = tmprc;
129 kfree(utf16_path);
130 return rc;
131}
132
133void
134move_smb2_info_to_cifs(FILE_ALL_INFO *dst, struct smb2_file_all_info *src)
135{
136 memcpy(dst, src, (size_t)(&src->CurrentByteOffset) - (size_t)src);
137 dst->CurrentByteOffset = src->CurrentByteOffset;
138 dst->Mode = src->Mode;
139 dst->AlignmentRequirement = src->AlignmentRequirement;
140 dst->IndexNumber1 = 0;
141}
142
143int
144smb2_query_path_info(const unsigned int xid, struct cifs_tcon *tcon,
145 struct cifs_sb_info *cifs_sb, const char *full_path,
146 FILE_ALL_INFO *data, bool *adjust_tz, bool *symlink)
147{
148 int rc;
149 struct smb2_file_all_info *smb2_data;
150
151 *adjust_tz = false;
152 *symlink = false;
153
154 smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
155 GFP_KERNEL);
156 if (smb2_data == NULL)
157 return -ENOMEM;
158
159 rc = smb2_open_op_close(xid, tcon, cifs_sb, full_path,
160 FILE_READ_ATTRIBUTES, FILE_OPEN, 0,
161 smb2_data, SMB2_OP_QUERY_INFO);
162 if (rc == -EOPNOTSUPP) {
163 *symlink = true;
164
165 rc = smb2_open_op_close(xid, tcon, cifs_sb, full_path,
166 FILE_READ_ATTRIBUTES, FILE_OPEN,
167 OPEN_REPARSE_POINT, smb2_data,
168 SMB2_OP_QUERY_INFO);
169 }
170 if (rc)
171 goto out;
172
173 move_smb2_info_to_cifs(data, smb2_data);
174out:
175 kfree(smb2_data);
176 return rc;
177}
178
179int
180smb2_mkdir(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
181 struct cifs_sb_info *cifs_sb)
182{
183 return smb2_open_op_close(xid, tcon, cifs_sb, name,
184 FILE_WRITE_ATTRIBUTES, FILE_CREATE,
185 CREATE_NOT_FILE, NULL, SMB2_OP_MKDIR);
186}
187
188void
189smb2_mkdir_setinfo(struct inode *inode, const char *name,
190 struct cifs_sb_info *cifs_sb, struct cifs_tcon *tcon,
191 const unsigned int xid)
192{
193 FILE_BASIC_INFO data;
194 struct cifsInodeInfo *cifs_i;
195 u32 dosattrs;
196 int tmprc;
197
198 memset(&data, 0, sizeof(data));
199 cifs_i = CIFS_I(inode);
200 dosattrs = cifs_i->cifsAttrs | ATTR_READONLY;
201 data.Attributes = cpu_to_le32(dosattrs);
202 tmprc = smb2_open_op_close(xid, tcon, cifs_sb, name,
203 FILE_WRITE_ATTRIBUTES, FILE_CREATE,
204 CREATE_NOT_FILE, &data, SMB2_OP_SET_INFO);
205 if (tmprc == 0)
206 cifs_i->cifsAttrs = dosattrs;
207}
208
209int
210smb2_rmdir(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
211 struct cifs_sb_info *cifs_sb)
212{
213 return smb2_open_op_close(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
214 CREATE_NOT_FILE,
215 NULL, SMB2_OP_RMDIR);
216}
217
218int
219smb2_unlink(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
220 struct cifs_sb_info *cifs_sb)
221{
222 return smb2_open_op_close(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
223 CREATE_DELETE_ON_CLOSE | OPEN_REPARSE_POINT,
224 NULL, SMB2_OP_DELETE);
225}
226
227static int
228smb2_set_path_attr(const unsigned int xid, struct cifs_tcon *tcon,
229 const char *from_name, const char *to_name,
230 struct cifs_sb_info *cifs_sb, __u32 access, int command)
231{
232 __le16 *smb2_to_name = NULL;
233 int rc;
234
235 smb2_to_name = cifs_convert_path_to_utf16(to_name, cifs_sb);
236 if (smb2_to_name == NULL) {
237 rc = -ENOMEM;
238 goto smb2_rename_path;
239 }
240
241 rc = smb2_open_op_close(xid, tcon, cifs_sb, from_name, access,
242 FILE_OPEN, 0, smb2_to_name, command);
243smb2_rename_path:
244 kfree(smb2_to_name);
245 return rc;
246}
247
248int
249smb2_rename_path(const unsigned int xid, struct cifs_tcon *tcon,
250 const char *from_name, const char *to_name,
251 struct cifs_sb_info *cifs_sb)
252{
253 return smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb,
254 DELETE, SMB2_OP_RENAME);
255}
256
257int
258smb2_create_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
259 const char *from_name, const char *to_name,
260 struct cifs_sb_info *cifs_sb)
261{
262 return smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb,
263 FILE_READ_ATTRIBUTES, SMB2_OP_HARDLINK);
264}
265
266int
267smb2_set_path_size(const unsigned int xid, struct cifs_tcon *tcon,
268 const char *full_path, __u64 size,
269 struct cifs_sb_info *cifs_sb, bool set_alloc)
270{
271 __le64 eof = cpu_to_le64(size);
272 return smb2_open_op_close(xid, tcon, cifs_sb, full_path,
273 FILE_WRITE_DATA, FILE_OPEN, 0, &eof,
274 SMB2_OP_SET_EOF);
275}
276
277int
278smb2_set_file_info(struct inode *inode, const char *full_path,
279 FILE_BASIC_INFO *buf, const unsigned int xid)
280{
281 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
282 struct tcon_link *tlink;
283 int rc;
284
285 if ((buf->CreationTime == 0) && (buf->LastAccessTime == 0) &&
286 (buf->LastWriteTime == 0) && (buf->ChangeTime == 0) &&
287 (buf->Attributes == 0))
288 return 0;
289
290 tlink = cifs_sb_tlink(cifs_sb);
291 if (IS_ERR(tlink))
292 return PTR_ERR(tlink);
293
294 rc = smb2_open_op_close(xid, tlink_tcon(tlink), cifs_sb, full_path,
295 FILE_WRITE_ATTRIBUTES, FILE_OPEN, 0, buf,
296 SMB2_OP_SET_INFO);
297 cifs_put_tlink(tlink);
298 return rc;
299}
300
