1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3 * Copyright (C) 2020, Microsoft Corporation.
4 *
5 * Author(s): Steve French <stfrench@microsoft.com>
6 * David Howells <dhowells@redhat.com>
7 */
8
9 #ifndef _FS_CONTEXT_H
10 #define _FS_CONTEXT_H
11
12 #include "cifsglob.h"
13 #include <linux/parser.h>
14 #include <linux/fs_parser.h>
15
16 /* Log errors in fs_context (new mount api) but also in dmesg (old style) */
17 #define cifs_errorf(fc, fmt, ...) \
18 do { \
19 errorf(fc, fmt, ## __VA_ARGS__); \
20 cifs_dbg(VFS, fmt, ## __VA_ARGS__); \
21 } while (0)
22
cifs_io_align(struct fs_context * fc,const char * name,size_t size)23 static inline size_t cifs_io_align(struct fs_context *fc,
24 const char *name, size_t size)
25 {
26 if (!size || !IS_ALIGNED(size, PAGE_SIZE)) {
27 cifs_errorf(fc, "unaligned %s, making it a multiple of %lu bytes\n",
28 name, PAGE_SIZE);
29 size = umax(round_down(size, PAGE_SIZE), PAGE_SIZE);
30 }
31 return size;
32 }
33
34 #define CIFS_ALIGN_WSIZE(_fc, _size) cifs_io_align(_fc, "wsize", _size)
35 #define CIFS_ALIGN_RSIZE(_fc, _size) cifs_io_align(_fc, "rsize", _size)
36 #define CIFS_ALIGN_BSIZE(_fc, _size) cifs_io_align(_fc, "bsize", _size)
37
38 enum smb_version {
39 Smb_1 = 1,
40 Smb_20,
41 Smb_21,
42 Smb_30,
43 Smb_302,
44 Smb_311,
45 Smb_3any,
46 Smb_default,
47 Smb_version_err
48 };
49
50 enum {
51 Opt_cache_loose,
52 Opt_cache_strict,
53 Opt_cache_none,
54 Opt_cache_ro,
55 Opt_cache_rw,
56 Opt_cache_err
57 };
58
59 enum cifs_reparse_parm {
60 Opt_reparse_default,
61 Opt_reparse_none,
62 Opt_reparse_nfs,
63 Opt_reparse_wsl,
64 Opt_reparse_err
65 };
66
67 enum cifs_symlink_parm {
68 Opt_symlink_default,
69 Opt_symlink_none,
70 Opt_symlink_native,
71 Opt_symlink_unix,
72 Opt_symlink_mfsymlinks,
73 Opt_symlink_sfu,
74 Opt_symlink_nfs,
75 Opt_symlink_wsl,
76 Opt_symlink_err
77 };
78
79 enum cifs_sec_param {
80 Opt_sec_krb5,
81 Opt_sec_krb5i,
82 Opt_sec_krb5p,
83 Opt_sec_ntlmsspi,
84 Opt_sec_ntlmssp,
85 Opt_sec_ntlmv2,
86 Opt_sec_ntlmv2i,
87 Opt_sec_none,
88
89 Opt_sec_err
90 };
91
92 enum cifs_upcall_target_param {
93 Opt_upcall_target_mount,
94 Opt_upcall_target_application,
95 Opt_upcall_target_err
96 };
97
98 enum cifs_param {
99 /* Mount options that take no arguments */
100 Opt_user_xattr,
101 Opt_forceuid,
102 Opt_forcegid,
103 Opt_noblocksend,
104 Opt_noautotune,
105 Opt_nolease,
106 Opt_nosparse,
107 Opt_hard,
108 Opt_soft,
109 Opt_perm,
110 Opt_nodelete,
111 Opt_mapposix,
112 Opt_mapchars,
113 Opt_nomapchars,
114 Opt_sfu,
115 Opt_nodfs,
116 Opt_posixpaths,
117 Opt_unix,
118 Opt_nocase,
119 Opt_brl,
120 Opt_handlecache,
121 Opt_forcemandatorylock,
122 Opt_setuidfromacl,
123 Opt_setuids,
124 Opt_dynperm,
125 Opt_intr,
126 Opt_strictsync,
127 Opt_serverino,
128 Opt_rwpidforward,
129 Opt_cifsacl,
130 Opt_acl,
131 Opt_locallease,
132 Opt_sign,
133 Opt_ignore_signature,
134 Opt_seal,
135 Opt_noac,
136 Opt_fsc,
137 Opt_mfsymlinks,
138 Opt_multiuser,
139 Opt_sloppy,
140 Opt_nosharesock,
141 Opt_persistent,
142 Opt_resilient,
143 Opt_tcp_nodelay,
144 Opt_domainauto,
145 Opt_rdma,
146 Opt_modesid,
147 Opt_rootfs,
148 Opt_multichannel,
149 Opt_compress,
150 Opt_witness,
151 Opt_is_upcall_target_mount,
152 Opt_is_upcall_target_application,
153 Opt_unicode,
154
155 /* Mount options which take numeric value */
156 Opt_backupuid,
157 Opt_backupgid,
158 Opt_uid,
159 Opt_cruid,
160 Opt_gid,
161 Opt_port,
162 Opt_file_mode,
163 Opt_dirmode,
164 Opt_min_enc_offload,
165 Opt_retrans,
166 Opt_blocksize,
167 Opt_rasize,
168 Opt_rsize,
169 Opt_wsize,
170 Opt_actimeo,
171 Opt_acdirmax,
172 Opt_acregmax,
173 Opt_closetimeo,
174 Opt_echo_interval,
175 Opt_max_credits,
176 Opt_max_cached_dirs,
177 Opt_snapshot,
178 Opt_max_channels,
179 Opt_handletimeout,
180
181 /* Mount options which take string value */
182 Opt_source,
183 Opt_user,
184 Opt_pass,
185 Opt_pass2,
186 Opt_ip,
187 Opt_domain,
188 Opt_srcaddr,
189 Opt_iocharset,
190 Opt_netbiosname,
191 Opt_servern,
192 Opt_nbsessinit,
193 Opt_ver,
194 Opt_vers,
195 Opt_sec,
196 Opt_cache,
197 Opt_reparse,
198 Opt_upcalltarget,
199 Opt_nativesocket,
200 Opt_symlink,
201 Opt_symlinkroot,
202
203 /* Mount options to be ignored */
204 Opt_ignore,
205
206 Opt_err
207 };
208
209 struct smb3_fs_context {
210 bool forceuid_specified;
211 bool forcegid_specified;
212 bool uid_specified;
213 bool cruid_specified;
214 bool gid_specified;
215 bool sloppy;
216 bool got_ip;
217 bool got_version;
218 bool got_rsize;
219 bool got_wsize;
220 bool got_bsize;
221 unsigned short port;
222
223 char *username;
224 char *password;
225 char *password2;
226 char *domainname;
227 char *source;
228 char *server_hostname;
229 char *UNC;
230 char *nodename;
231 char workstation_name[CIFS_MAX_WORKSTATION_LEN];
232 char *iocharset; /* local code page for mapping to and from Unicode */
233 char source_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* clnt nb name */
234 char target_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* srvr nb name */
235 int rfc1001_sessinit;
236 kuid_t cred_uid;
237 kuid_t linux_uid;
238 kgid_t linux_gid;
239 kuid_t backupuid;
240 kgid_t backupgid;
241 umode_t file_mode;
242 umode_t dir_mode;
243 enum securityEnum sectype; /* sectype requested via mnt opts */
244 enum upcall_target_enum upcall_target; /* where to upcall for mount */
245 bool sign; /* was signing requested via mnt opts? */
246 bool ignore_signature:1;
247 bool retry:1;
248 bool intr:1;
249 bool setuids:1;
250 bool setuidfromacl:1;
251 bool override_uid:1;
252 bool override_gid:1;
253 bool dynperm:1;
254 bool noperm:1;
255 bool nodelete:1;
256 bool mode_ace:1;
257 bool no_psx_acl:1; /* set if posix acl support should be disabled */
258 bool cifs_acl:1;
259 bool backupuid_specified; /* mount option backupuid is specified */
260 bool backupgid_specified; /* mount option backupgid is specified */
261 bool no_xattr:1; /* set if xattr (EA) support should be disabled*/
262 bool server_ino:1; /* use inode numbers from server ie UniqueId */
263 bool direct_io:1;
264 bool strict_io:1; /* strict cache behavior */
265 bool cache_ro:1;
266 bool cache_rw:1;
267 bool remap:1; /* set to remap seven reserved chars in filenames */
268 bool sfu_remap:1; /* remap seven reserved chars ala SFU */
269 bool posix_paths:1; /* unset to not ask for posix pathnames. */
270 bool no_linux_ext:1;
271 bool linux_ext:1;
272 bool sfu_emul:1;
273 bool nullauth:1; /* attempt to authenticate with null user */
274 bool nocase:1; /* request case insensitive filenames */
275 bool nobrl:1; /* disable sending byte range locks to srv */
276 bool nohandlecache:1; /* disable caching dir handles if srvr probs */
277 bool mand_lock:1; /* send mandatory not posix byte range lock reqs */
278 bool seal:1; /* request transport encryption on share */
279 bool nodfs:1; /* Do not request DFS, even if available */
280 bool local_lease:1; /* check leases only on local system, not remote */
281 bool noblocksnd:1;
282 bool noautotune:1;
283 bool nostrictsync:1; /* do not force expensive SMBflush on every sync */
284 bool no_lease:1; /* disable requesting leases */
285 bool no_sparse:1; /* do not attempt to set files sparse */
286 bool fsc:1; /* enable fscache */
287 bool mfsymlinks:1; /* use Minshall+French Symlinks */
288 bool multiuser:1;
289 bool rwpidforward:1; /* pid forward for read/write operations */
290 bool nosharesock:1;
291 bool persistent:1;
292 bool nopersistent:1;
293 bool resilient:1; /* noresilient not required since not fored for CA */
294 bool domainauto:1;
295 bool rdma:1;
296 bool multichannel:1;
297 bool use_client_guid:1;
298 /* reuse existing guid for multichannel */
299 u8 client_guid[SMB2_CLIENT_GUID_SIZE];
300 /* User-specified original r/wsize value */
301 unsigned int vol_rsize;
302 unsigned int vol_wsize;
303 unsigned int bsize;
304 unsigned int rasize;
305 unsigned int rsize;
306 unsigned int wsize;
307 unsigned int min_offload;
308 unsigned int retrans;
309 bool sockopt_tcp_nodelay:1;
310 /* attribute cache timeout for files and directories in jiffies */
311 unsigned long acregmax;
312 unsigned long acdirmax;
313 /* timeout for deferred close of files in jiffies */
314 unsigned long closetimeo;
315 struct smb_version_operations *ops;
316 struct smb_version_values *vals;
317 char *prepath;
318 struct sockaddr_storage dstaddr; /* destination address */
319 struct sockaddr_storage srcaddr; /* allow binding to a local IP */
320 struct nls_table *local_nls; /* This is a copy of the pointer in cifs_sb */
321 unsigned int echo_interval; /* echo interval in secs */
322 __u64 snapshot_time; /* needed for timewarp tokens */
323 __u32 handle_timeout; /* persistent and durable handle timeout in ms */
324 unsigned int max_credits; /* smb3 max_credits 10 < credits < 60000 */
325 unsigned int max_channels;
326 unsigned int max_cached_dirs;
327 bool compress; /* enable SMB2 messages (READ/WRITE) de/compression */
328 bool rootfs:1; /* if it's a SMB root file system */
329 bool witness:1; /* use witness protocol */
330 int unicode;
331 char *leaf_fullpath;
332 struct cifs_ses *dfs_root_ses;
333 bool dfs_automount:1; /* set for dfs automount only */
334 enum cifs_reparse_type reparse_type;
335 enum cifs_symlink_type symlink_type;
336 bool nonativesocket:1;
337 bool dfs_conn:1; /* set for dfs mounts */
338 char *dns_dom;
339 char *symlinkroot; /* top level directory for native SMB symlinks in absolute format */
340 };
341
342 extern const struct fs_parameter_spec smb3_fs_parameters[];
343
344 extern enum cifs_symlink_type get_cifs_symlink_type(struct cifs_sb_info *cifs_sb);
345
346 extern int smb3_init_fs_context(struct fs_context *fc);
347 extern void smb3_cleanup_fs_context_contents(struct smb3_fs_context *ctx);
348 extern void smb3_cleanup_fs_context(struct smb3_fs_context *ctx);
349
smb3_fc2context(const struct fs_context * fc)350 static inline struct smb3_fs_context *smb3_fc2context(const struct fs_context *fc)
351 {
352 return fc->fs_private;
353 }
354
355 extern int smb3_fs_context_dup(struct smb3_fs_context *new_ctx, struct smb3_fs_context *ctx);
356 extern int smb3_sync_session_ctx_passwords(struct cifs_sb_info *cifs_sb, struct cifs_ses *ses);
357 extern void smb3_update_mnt_flags(struct cifs_sb_info *cifs_sb);
358
359 /*
360 * max deferred close timeout (jiffies) - 2^30
361 */
362 #define SMB3_MAX_DCLOSETIMEO (1 << 30)
363 #define SMB3_DEF_DCLOSETIMEO (1 * HZ) /* even 1 sec enough to help eg open/write/close/open/read */
364 #define MAX_CACHED_FIDS 16
365 extern char *cifs_sanitize_prepath(char *prepath, gfp_t gfp);
366
367 extern struct mutex cifs_mount_mutex;
368
cifs_mount_lock(void)369 static inline void cifs_mount_lock(void)
370 {
371 mutex_lock(&cifs_mount_mutex);
372 }
373
cifs_mount_unlock(void)374 static inline void cifs_mount_unlock(void)
375 {
376 mutex_unlock(&cifs_mount_mutex);
377 }
378
cifs_negotiate_rsize(struct TCP_Server_Info * server,struct smb3_fs_context * ctx,struct cifs_tcon * tcon)379 static inline void cifs_negotiate_rsize(struct TCP_Server_Info *server,
380 struct smb3_fs_context *ctx,
381 struct cifs_tcon *tcon)
382 {
383 unsigned int size;
384
385 size = umax(server->ops->negotiate_rsize(tcon, ctx), PAGE_SIZE);
386 if (ctx->rsize)
387 size = umax(umin(ctx->rsize, size), PAGE_SIZE);
388 ctx->rsize = round_down(size, PAGE_SIZE);
389 }
390
cifs_negotiate_wsize(struct TCP_Server_Info * server,struct smb3_fs_context * ctx,struct cifs_tcon * tcon)391 static inline void cifs_negotiate_wsize(struct TCP_Server_Info *server,
392 struct smb3_fs_context *ctx,
393 struct cifs_tcon *tcon)
394 {
395 unsigned int size;
396
397 size = umax(server->ops->negotiate_wsize(tcon, ctx), PAGE_SIZE);
398 if (ctx->wsize)
399 size = umax(umin(ctx->wsize, size), PAGE_SIZE);
400 ctx->wsize = round_down(size, PAGE_SIZE);
401 }
402
cifs_negotiate_iosize(struct TCP_Server_Info * server,struct smb3_fs_context * ctx,struct cifs_tcon * tcon)403 static inline void cifs_negotiate_iosize(struct TCP_Server_Info *server,
404 struct smb3_fs_context *ctx,
405 struct cifs_tcon *tcon)
406 {
407 cifs_negotiate_rsize(server, ctx, tcon);
408 cifs_negotiate_wsize(server, ctx, tcon);
409 }
410
411 #endif
412