1 /* SPDX-License-Identifier: GPL-2.0-or-later */
3 * Copyright (C) 2020, Microsoft Corporation.
5 * Author(s): Steve French <stfrench@microsoft.com>
6 * David Howells <dhowells@redhat.com>
13 #include <linux/parser.h>
14 #include <linux/fs_parser.h>
16 /* Log errors in fs_context (new mount api) but also in dmesg (old style) */
17 #define cifs_errorf(fc, fmt, ...) \
19 errorf(fc, fmt, ## __VA_ARGS__); \
20 cifs_dbg(VFS, fmt, ## __VA_ARGS__); \
44 enum cifs_reparse_parm {
65 /* Mount options that take no arguments */
87 Opt_forcemandatorylock,
118 /* Mount options which take numeric value */
144 /* Mount options which take string value */
161 /* Mount options to be ignored */
167 struct smb3_fs_context {
169 bool cruid_specified;
184 char *server_hostname;
187 char workstation_name[CIFS_MAX_WORKSTATION_LEN];
188 char *iocharset; /* local code page for mapping to and from Unicode */
189 char source_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* clnt nb name */
190 char target_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* srvr nb name */
198 enum securityEnum sectype; /* sectype requested via mnt opts */
199 bool sign; /* was signing requested via mnt opts? */
200 bool ignore_signature:1;
204 bool setuidfromacl:1;
211 bool no_psx_acl:1; /* set if posix acl support should be disabled */
213 bool backupuid_specified; /* mount option backupuid is specified */
214 bool backupgid_specified; /* mount option backupgid is specified */
215 bool no_xattr:1; /* set if xattr (EA) support should be disabled*/
216 bool server_ino:1; /* use inode numbers from server ie UniqueId */
218 bool strict_io:1; /* strict cache behavior */
221 bool remap:1; /* set to remap seven reserved chars in filenames */
222 bool sfu_remap:1; /* remap seven reserved chars ala SFU */
223 bool posix_paths:1; /* unset to not ask for posix pathnames. */
227 bool nullauth:1; /* attempt to authenticate with null user */
228 bool nocase:1; /* request case insensitive filenames */
229 bool nobrl:1; /* disable sending byte range locks to srv */
230 bool nohandlecache:1; /* disable caching dir handles if srvr probs */
231 bool mand_lock:1; /* send mandatory not posix byte range lock reqs */
232 bool seal:1; /* request transport encryption on share */
233 bool nodfs:1; /* Do not request DFS, even if available */
234 bool local_lease:1; /* check leases only on local system, not remote */
237 bool nostrictsync:1; /* do not force expensive SMBflush on every sync */
238 bool no_lease:1; /* disable requesting leases */
239 bool no_sparse:1; /* do not attempt to set files sparse */
240 bool fsc:1; /* enable fscache */
241 bool mfsymlinks:1; /* use Minshall+French Symlinks */
243 bool rwpidforward:1; /* pid forward for read/write operations */
247 bool resilient:1; /* noresilient not required since not fored for CA */
251 bool use_client_guid:1;
252 /* reuse existing guid for multichannel */
253 u8 client_guid[SMB2_CLIENT_GUID_SIZE];
258 unsigned int min_offload;
259 unsigned int retrans;
260 bool sockopt_tcp_nodelay:1;
261 /* attribute cache timemout for files and directories in jiffies */
262 unsigned long acregmax;
263 unsigned long acdirmax;
264 /* timeout for deferred close of files in jiffies */
265 unsigned long closetimeo;
266 struct smb_version_operations *ops;
267 struct smb_version_values *vals;
269 struct sockaddr_storage dstaddr; /* destination address */
270 struct sockaddr_storage srcaddr; /* allow binding to a local IP */
271 struct nls_table *local_nls; /* This is a copy of the pointer in cifs_sb */
272 unsigned int echo_interval; /* echo interval in secs */
273 __u64 snapshot_time; /* needed for timewarp tokens */
274 __u32 handle_timeout; /* persistent and durable handle timeout in ms */
275 unsigned int max_credits; /* smb3 max_credits 10 < credits < 60000 */
276 unsigned int max_channels;
277 unsigned int max_cached_dirs;
278 bool compress; /* enable SMB2 messages (READ/WRITE) de/compression */
279 bool rootfs:1; /* if it's a SMB root file system */
280 bool witness:1; /* use witness protocol */
282 struct cifs_ses *dfs_root_ses;
283 bool dfs_automount:1; /* set for dfs automount only */
284 enum cifs_reparse_type reparse_type;
287 extern const struct fs_parameter_spec smb3_fs_parameters[];
289 extern int smb3_init_fs_context(struct fs_context *fc);
290 extern void smb3_cleanup_fs_context_contents(struct smb3_fs_context *ctx);
291 extern void smb3_cleanup_fs_context(struct smb3_fs_context *ctx);
293 static inline struct smb3_fs_context *smb3_fc2context(const struct fs_context *fc)
295 return fc->fs_private;
298 extern int smb3_fs_context_dup(struct smb3_fs_context *new_ctx, struct smb3_fs_context *ctx);
299 extern void smb3_update_mnt_flags(struct cifs_sb_info *cifs_sb);
302 * max deferred close timeout (jiffies) - 2^30
304 #define SMB3_MAX_DCLOSETIMEO (1 << 30)
305 #define SMB3_DEF_DCLOSETIMEO (1 * HZ) /* even 1 sec enough to help eg open/write/close/open/read */
306 #define MAX_CACHED_FIDS 16
307 extern char *cifs_sanitize_prepath(char *prepath, gfp_t gfp);
309 extern struct mutex cifs_mount_mutex;
311 static inline void cifs_mount_lock(void)
313 mutex_lock(&cifs_mount_mutex);
316 static inline void cifs_mount_unlock(void)
318 mutex_unlock(&cifs_mount_mutex);