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>
10 #include <linux/module.h>
11 #include <linux/nsproxy.h>
12 #include <linux/slab.h>
13 #include <linux/magic.h>
14 #include <linux/security.h>
15 #include <net/net_namespace.h>
16 #ifdef CONFIG_CIFS_DFS_UPCALL
17 #include "dfs_cache.h"
21 #include <linux/ctype.h>
22 #include <linux/fs_context.h>
23 #include <linux/fs_parser.h>
25 #include <linux/mount.h>
26 #include <linux/parser.h>
27 #include <linux/utsname.h>
31 #include "cifsproto.h"
32 #include "cifs_unicode.h"
33 #include "cifs_debug.h"
34 #include "cifs_fs_sb.h"
37 #include "rfc1002pdu.h"
38 #include "fs_context.h"
40 static const match_table_t cifs_smb_version_tokens = {
41 { Smb_1, SMB1_VERSION_STRING },
42 { Smb_20, SMB20_VERSION_STRING},
43 { Smb_21, SMB21_VERSION_STRING },
44 { Smb_30, SMB30_VERSION_STRING },
45 { Smb_302, SMB302_VERSION_STRING },
46 { Smb_302, ALT_SMB302_VERSION_STRING },
47 { Smb_311, SMB311_VERSION_STRING },
48 { Smb_311, ALT_SMB311_VERSION_STRING },
49 { Smb_3any, SMB3ANY_VERSION_STRING },
50 { Smb_default, SMBDEFAULT_VERSION_STRING },
51 { Smb_version_err, NULL }
54 static const match_table_t cifs_secflavor_tokens = {
55 { Opt_sec_krb5, "krb5" },
56 { Opt_sec_krb5i, "krb5i" },
57 { Opt_sec_krb5p, "krb5p" },
58 { Opt_sec_ntlmsspi, "ntlmsspi" },
59 { Opt_sec_ntlmssp, "ntlmssp" },
60 { Opt_sec_ntlmv2, "nontlm" },
61 { Opt_sec_ntlmv2, "ntlmv2" },
62 { Opt_sec_ntlmv2i, "ntlmv2i" },
63 { Opt_sec_none, "none" },
68 const struct fs_parameter_spec smb3_fs_parameters[] = {
69 /* Mount options that take no arguments */
70 fsparam_flag_no("user_xattr", Opt_user_xattr),
71 fsparam_flag_no("forceuid", Opt_forceuid),
72 fsparam_flag_no("multichannel", Opt_multichannel),
73 fsparam_flag_no("forcegid", Opt_forcegid),
74 fsparam_flag("noblocksend", Opt_noblocksend),
75 fsparam_flag("noautotune", Opt_noautotune),
76 fsparam_flag("nolease", Opt_nolease),
77 fsparam_flag_no("hard", Opt_hard),
78 fsparam_flag_no("soft", Opt_soft),
79 fsparam_flag_no("perm", Opt_perm),
80 fsparam_flag("nodelete", Opt_nodelete),
81 fsparam_flag_no("mapposix", Opt_mapposix),
82 fsparam_flag("mapchars", Opt_mapchars),
83 fsparam_flag("nomapchars", Opt_nomapchars),
84 fsparam_flag_no("sfu", Opt_sfu),
85 fsparam_flag("nodfs", Opt_nodfs),
86 fsparam_flag_no("posixpaths", Opt_posixpaths),
87 fsparam_flag_no("unix", Opt_unix),
88 fsparam_flag_no("linux", Opt_unix),
89 fsparam_flag_no("posix", Opt_unix),
90 fsparam_flag("nocase", Opt_nocase),
91 fsparam_flag("ignorecase", Opt_nocase),
92 fsparam_flag_no("brl", Opt_brl),
93 fsparam_flag_no("handlecache", Opt_handlecache),
94 fsparam_flag("forcemandatorylock", Opt_forcemandatorylock),
95 fsparam_flag("forcemand", Opt_forcemandatorylock),
96 fsparam_flag("setuidfromacl", Opt_setuidfromacl),
97 fsparam_flag("idsfromsid", Opt_setuidfromacl),
98 fsparam_flag_no("setuids", Opt_setuids),
99 fsparam_flag_no("dynperm", Opt_dynperm),
100 fsparam_flag_no("intr", Opt_intr),
101 fsparam_flag_no("strictsync", Opt_strictsync),
102 fsparam_flag_no("serverino", Opt_serverino),
103 fsparam_flag("rwpidforward", Opt_rwpidforward),
104 fsparam_flag("cifsacl", Opt_cifsacl),
105 fsparam_flag_no("acl", Opt_acl),
106 fsparam_flag("locallease", Opt_locallease),
107 fsparam_flag("sign", Opt_sign),
108 fsparam_flag("ignore_signature", Opt_ignore_signature),
109 fsparam_flag("signloosely", Opt_ignore_signature),
110 fsparam_flag("seal", Opt_seal),
111 fsparam_flag("noac", Opt_noac),
112 fsparam_flag("fsc", Opt_fsc),
113 fsparam_flag("mfsymlinks", Opt_mfsymlinks),
114 fsparam_flag("multiuser", Opt_multiuser),
115 fsparam_flag("sloppy", Opt_sloppy),
116 fsparam_flag("nosharesock", Opt_nosharesock),
117 fsparam_flag_no("persistenthandles", Opt_persistent),
118 fsparam_flag_no("resilienthandles", Opt_resilient),
119 fsparam_flag_no("tcpnodelay", Opt_tcp_nodelay),
120 fsparam_flag("domainauto", Opt_domainauto),
121 fsparam_flag("rdma", Opt_rdma),
122 fsparam_flag("modesid", Opt_modesid),
123 fsparam_flag("modefromsid", Opt_modesid),
124 fsparam_flag("rootfs", Opt_rootfs),
125 fsparam_flag("compress", Opt_compress),
126 fsparam_flag("witness", Opt_witness),
128 /* Mount options which take numeric value */
129 fsparam_u32("backupuid", Opt_backupuid),
130 fsparam_u32("backupgid", Opt_backupgid),
131 fsparam_u32("uid", Opt_uid),
132 fsparam_u32("cruid", Opt_cruid),
133 fsparam_u32("gid", Opt_gid),
134 fsparam_u32("file_mode", Opt_file_mode),
135 fsparam_u32("dirmode", Opt_dirmode),
136 fsparam_u32("dir_mode", Opt_dirmode),
137 fsparam_u32("port", Opt_port),
138 fsparam_u32("min_enc_offload", Opt_min_enc_offload),
139 fsparam_u32("esize", Opt_min_enc_offload),
140 fsparam_u32("bsize", Opt_blocksize),
141 fsparam_u32("rasize", Opt_rasize),
142 fsparam_u32("rsize", Opt_rsize),
143 fsparam_u32("wsize", Opt_wsize),
144 fsparam_u32("actimeo", Opt_actimeo),
145 fsparam_u32("acdirmax", Opt_acdirmax),
146 fsparam_u32("acregmax", Opt_acregmax),
147 fsparam_u32("echo_interval", Opt_echo_interval),
148 fsparam_u32("max_credits", Opt_max_credits),
149 fsparam_u32("handletimeout", Opt_handletimeout),
150 fsparam_u32("snapshot", Opt_snapshot),
151 fsparam_u32("max_channels", Opt_max_channels),
153 /* Mount options which take string value */
154 fsparam_string("source", Opt_source),
155 fsparam_string("user", Opt_user),
156 fsparam_string("username", Opt_user),
157 fsparam_string("pass", Opt_pass),
158 fsparam_string("password", Opt_pass),
159 fsparam_string("ip", Opt_ip),
160 fsparam_string("addr", Opt_ip),
161 fsparam_string("domain", Opt_domain),
162 fsparam_string("dom", Opt_domain),
163 fsparam_string("srcaddr", Opt_srcaddr),
164 fsparam_string("iocharset", Opt_iocharset),
165 fsparam_string("netbiosname", Opt_netbiosname),
166 fsparam_string("servern", Opt_servern),
167 fsparam_string("ver", Opt_ver),
168 fsparam_string("vers", Opt_vers),
169 fsparam_string("sec", Opt_sec),
170 fsparam_string("cache", Opt_cache),
172 /* Arguments that should be ignored */
173 fsparam_flag("guest", Opt_ignore),
174 fsparam_flag("noatime", Opt_ignore),
175 fsparam_flag("relatime", Opt_ignore),
176 fsparam_flag("_netdev", Opt_ignore),
177 fsparam_flag_no("suid", Opt_ignore),
178 fsparam_flag_no("exec", Opt_ignore),
179 fsparam_flag_no("dev", Opt_ignore),
180 fsparam_flag_no("mand", Opt_ignore),
181 fsparam_flag_no("auto", Opt_ignore),
182 fsparam_string("cred", Opt_ignore),
183 fsparam_string("credentials", Opt_ignore),
185 * UNC and prefixpath is now extracted from Opt_source
186 * in the new mount API so we can just ignore them going forward.
188 fsparam_string("unc", Opt_ignore),
189 fsparam_string("prefixpath", Opt_ignore),
194 cifs_parse_security_flavors(struct fs_context *fc, char *value, struct smb3_fs_context *ctx)
197 substring_t args[MAX_OPT_ARGS];
200 * With mount options, the last one should win. Reset any existing
201 * settings back to default.
203 ctx->sectype = Unspecified;
206 switch (match_token(value, cifs_secflavor_tokens, args)) {
208 cifs_errorf(fc, "sec=krb5p is not supported!\n");
214 ctx->sectype = Kerberos;
216 case Opt_sec_ntlmsspi:
219 case Opt_sec_ntlmssp:
220 ctx->sectype = RawNTLMSSP;
222 case Opt_sec_ntlmv2i:
226 ctx->sectype = NTLMv2;
232 cifs_errorf(fc, "bad security option: %s\n", value);
239 static const match_table_t cifs_cacheflavor_tokens = {
240 { Opt_cache_loose, "loose" },
241 { Opt_cache_strict, "strict" },
242 { Opt_cache_none, "none" },
243 { Opt_cache_ro, "ro" },
244 { Opt_cache_rw, "singleclient" },
245 { Opt_cache_err, NULL }
249 cifs_parse_cache_flavor(struct fs_context *fc, char *value, struct smb3_fs_context *ctx)
251 substring_t args[MAX_OPT_ARGS];
253 switch (match_token(value, cifs_cacheflavor_tokens, args)) {
254 case Opt_cache_loose:
255 ctx->direct_io = false;
256 ctx->strict_io = false;
257 ctx->cache_ro = false;
258 ctx->cache_rw = false;
260 case Opt_cache_strict:
261 ctx->direct_io = false;
262 ctx->strict_io = true;
263 ctx->cache_ro = false;
264 ctx->cache_rw = false;
267 ctx->direct_io = true;
268 ctx->strict_io = false;
269 ctx->cache_ro = false;
270 ctx->cache_rw = false;
273 ctx->direct_io = false;
274 ctx->strict_io = false;
275 ctx->cache_ro = true;
276 ctx->cache_rw = false;
279 ctx->direct_io = false;
280 ctx->strict_io = false;
281 ctx->cache_ro = false;
282 ctx->cache_rw = true;
285 cifs_errorf(fc, "bad cache= option: %s\n", value);
291 #define DUP_CTX_STR(field) \
294 new_ctx->field = kstrdup(ctx->field, GFP_ATOMIC); \
295 if (new_ctx->field == NULL) { \
296 smb3_cleanup_fs_context_contents(new_ctx); \
303 smb3_fs_context_dup(struct smb3_fs_context *new_ctx, struct smb3_fs_context *ctx)
305 memcpy(new_ctx, ctx, sizeof(*ctx));
306 new_ctx->prepath = NULL;
307 new_ctx->mount_options = NULL;
308 new_ctx->nodename = NULL;
309 new_ctx->username = NULL;
310 new_ctx->password = NULL;
311 new_ctx->server_hostname = NULL;
312 new_ctx->domainname = NULL;
313 new_ctx->workstation_name = NULL;
315 new_ctx->source = NULL;
316 new_ctx->iocharset = NULL;
318 * Make sure to stay in sync with smb3_cleanup_fs_context_contents()
320 DUP_CTX_STR(prepath);
321 DUP_CTX_STR(mount_options);
322 DUP_CTX_STR(username);
323 DUP_CTX_STR(password);
324 DUP_CTX_STR(server_hostname);
327 DUP_CTX_STR(domainname);
328 DUP_CTX_STR(workstation_name);
329 DUP_CTX_STR(nodename);
330 DUP_CTX_STR(iocharset);
336 cifs_parse_smb_version(struct fs_context *fc, char *value, struct smb3_fs_context *ctx, bool is_smb3)
338 substring_t args[MAX_OPT_ARGS];
340 switch (match_token(value, cifs_smb_version_tokens, args)) {
341 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
343 if (disable_legacy_dialects) {
344 cifs_errorf(fc, "mount with legacy dialect disabled\n");
348 cifs_errorf(fc, "vers=1.0 (cifs) not permitted when mounting with smb3\n");
351 cifs_errorf(fc, "Use of the less secure dialect vers=1.0 is not recommended unless required for access to very old servers\n");
352 ctx->ops = &smb1_operations;
353 ctx->vals = &smb1_values;
356 if (disable_legacy_dialects) {
357 cifs_errorf(fc, "mount with legacy dialect disabled\n");
361 cifs_errorf(fc, "vers=2.0 not permitted when mounting with smb3\n");
364 ctx->ops = &smb20_operations;
365 ctx->vals = &smb20_values;
369 cifs_errorf(fc, "vers=1.0 (cifs) mount not permitted when legacy dialects disabled\n");
372 cifs_errorf(fc, "vers=2.0 mount not permitted when legacy dialects disabled\n");
374 #endif /* CIFS_ALLOW_INSECURE_LEGACY */
376 ctx->ops = &smb21_operations;
377 ctx->vals = &smb21_values;
380 ctx->ops = &smb30_operations;
381 ctx->vals = &smb30_values;
384 ctx->ops = &smb30_operations; /* currently identical with 3.0 */
385 ctx->vals = &smb302_values;
388 ctx->ops = &smb311_operations;
389 ctx->vals = &smb311_values;
392 ctx->ops = &smb30_operations; /* currently identical with 3.0 */
393 ctx->vals = &smb3any_values;
396 ctx->ops = &smb30_operations;
397 ctx->vals = &smbdefault_values;
400 cifs_errorf(fc, "Unknown vers= option specified: %s\n", value);
406 int smb3_parse_opt(const char *options, const char *key, char **val)
409 char *opts, *orig, *p;
411 orig = opts = kstrdup(options, GFP_KERNEL);
415 while ((p = strsep(&opts, ","))) {
420 if (strncasecmp(p, key, strlen(key)))
422 nval = strchr(p, '=');
427 *val = kstrdup(nval, GFP_KERNEL);
428 rc = !*val ? -ENOMEM : 0;
438 * Remove duplicate path delimiters. Windows is supposed to do that
439 * but there are some bugs that prevent rename from working if there are
440 * multiple delimiters.
442 * Returns a sanitized duplicate of @path. The caller is responsible for
443 * cleaning up the original.
445 #define IS_DELIM(c) ((c) == '/' || (c) == '\\')
446 static char *sanitize_path(char *path)
448 char *cursor1 = path, *cursor2 = path;
450 /* skip all prepended delimiters */
451 while (IS_DELIM(*cursor1))
454 /* copy the first letter */
457 /* copy the remainder... */
458 while (*(cursor1++)) {
459 /* ... skipping all duplicated delimiters */
460 if (IS_DELIM(*cursor1) && IS_DELIM(*cursor2))
462 *(++cursor2) = *cursor1;
465 /* if the last character is a delimiter, skip it */
466 if (IS_DELIM(*(cursor2 - 1)))
470 return kstrdup(path, GFP_KERNEL);
474 * Parse a devname into substrings and populate the ctx->UNC and ctx->prepath
475 * fields with the result. Returns 0 on success and an error otherwise
476 * (e.g. ENOMEM or EINVAL)
479 smb3_parse_devname(const char *devname, struct smb3_fs_context *ctx)
482 const char *delims = "/\\";
485 if (unlikely(!devname || !*devname)) {
486 cifs_dbg(VFS, "Device name not specified\n");
490 /* make sure we have a valid UNC double delimiter prefix */
491 len = strspn(devname, delims);
495 /* find delimiter between host and sharename */
496 pos = strpbrk(devname + 2, delims);
500 /* record the server hostname */
501 kfree(ctx->server_hostname);
502 ctx->server_hostname = kstrndup(devname + 2, pos - devname - 2, GFP_KERNEL);
503 if (!ctx->server_hostname)
506 /* skip past delimiter */
509 /* now go until next delimiter or end of string */
510 len = strcspn(pos, delims);
512 /* move "pos" up to delimiter or NULL */
515 ctx->UNC = kstrndup(devname, pos - devname, GFP_KERNEL);
519 convert_delimiter(ctx->UNC, '\\');
521 /* skip any delimiter */
522 if (*pos == '/' || *pos == '\\')
528 /* If pos is NULL then no prepath */
532 ctx->prepath = sanitize_path(pos);
539 static void smb3_fs_context_free(struct fs_context *fc);
540 static int smb3_fs_context_parse_param(struct fs_context *fc,
541 struct fs_parameter *param);
542 static int smb3_fs_context_parse_monolithic(struct fs_context *fc,
544 static int smb3_get_tree(struct fs_context *fc);
545 static int smb3_reconfigure(struct fs_context *fc);
547 static const struct fs_context_operations smb3_fs_context_ops = {
548 .free = smb3_fs_context_free,
549 .parse_param = smb3_fs_context_parse_param,
550 .parse_monolithic = smb3_fs_context_parse_monolithic,
551 .get_tree = smb3_get_tree,
552 .reconfigure = smb3_reconfigure,
556 * Parse a monolithic block of data from sys_mount().
557 * smb3_fs_context_parse_monolithic - Parse key[=val][,key[=val]]* mount data
558 * @ctx: The superblock configuration to fill in.
559 * @data: The data to parse
561 * Parse a blob of data that's in key[=val][,key[=val]]* form. This can be
562 * called from the ->monolithic_mount_data() fs_context operation.
564 * Returns 0 on success or the error returned by the ->parse_option() fs_context
565 * operation on failure.
567 static int smb3_fs_context_parse_monolithic(struct fs_context *fc,
570 struct smb3_fs_context *ctx = smb3_fc2context(fc);
571 char *options = data, *key;
577 ctx->mount_options = kstrdup(data, GFP_KERNEL);
578 if (ctx->mount_options == NULL)
581 ret = security_sb_eat_lsm_opts(options, &fc->security);
585 /* BB Need to add support for sep= here TBD */
586 while ((key = strsep(&options, ",")) != NULL) {
593 /* Check if following character is the deliminator If yes,
594 * we have encountered a double deliminator reset the NULL
595 * character to the deliminator
597 while (options && options[0] == ',') {
599 strcpy(key + len, options);
600 options = strchr(options, ',');
607 value = strchr(key, '=');
615 ret = vfs_parse_fs_string(fc, key, value, len);
624 * Validate the preparsed information in the config.
626 static int smb3_fs_context_validate(struct fs_context *fc)
628 struct smb3_fs_context *ctx = smb3_fc2context(fc);
630 if (ctx->rdma && ctx->vals->protocol_id < SMB30_PROT_ID) {
631 cifs_errorf(fc, "SMB Direct requires Version >=3.0\n");
636 /* Muliuser mounts require CONFIG_KEYS support */
637 if (ctx->multiuser) {
638 cifs_errorf(fc, "Multiuser mounts require kernels with CONFIG_KEYS enabled\n");
643 if (ctx->got_version == false)
644 pr_warn_once("No dialect specified on mount. Default has changed to a more secure dialect, SMB2.1 or later (e.g. SMB3.1.1), from CIFS (SMB1). To use the less secure SMB1 dialect to access old servers which do not support SMB3.1.1 (or even SMB3 or SMB2.1) specify vers=1.0 on mount.\n");
648 cifs_errorf(fc, "CIFS mount error: No usable UNC path provided in device string!\n");
652 /* make sure UNC has a share name */
653 if (strlen(ctx->UNC) < 3 || !strchr(ctx->UNC + 3, '\\')) {
654 cifs_errorf(fc, "Malformed UNC. Unable to find share name.\n");
662 /* No ip= option specified? Try to get it from UNC */
663 /* Use the address part of the UNC. */
664 slash = strchr(&ctx->UNC[2], '\\');
665 len = slash - &ctx->UNC[2];
666 if (!cifs_convert_address((struct sockaddr *)&ctx->dstaddr,
667 &ctx->UNC[2], len)) {
668 pr_err("Unable to determine destination address\n");
669 return -EHOSTUNREACH;
673 /* set the port that we got earlier */
674 cifs_set_port((struct sockaddr *)&ctx->dstaddr, ctx->port);
676 if (ctx->override_uid && !ctx->uid_specified) {
677 ctx->override_uid = 0;
678 pr_notice("ignoring forceuid mount option specified with no uid= option\n");
681 if (ctx->override_gid && !ctx->gid_specified) {
682 ctx->override_gid = 0;
683 pr_notice("ignoring forcegid mount option specified with no gid= option\n");
689 static int smb3_get_tree_common(struct fs_context *fc)
691 struct smb3_fs_context *ctx = smb3_fc2context(fc);
695 root = cifs_smb3_do_mount(fc->fs_type, 0, ctx);
697 return PTR_ERR(root);
705 * Create an SMB3 superblock from the parameters passed.
707 static int smb3_get_tree(struct fs_context *fc)
709 int err = smb3_fs_context_validate(fc);
713 return smb3_get_tree_common(fc);
716 static void smb3_fs_context_free(struct fs_context *fc)
718 struct smb3_fs_context *ctx = smb3_fc2context(fc);
720 smb3_cleanup_fs_context(ctx);
724 * Compare the old and new proposed context during reconfigure
725 * and check if the changes are compatible.
727 static int smb3_verify_reconfigure_ctx(struct fs_context *fc,
728 struct smb3_fs_context *new_ctx,
729 struct smb3_fs_context *old_ctx)
731 if (new_ctx->posix_paths != old_ctx->posix_paths) {
732 cifs_errorf(fc, "can not change posixpaths during remount\n");
735 if (new_ctx->sectype != old_ctx->sectype) {
736 cifs_errorf(fc, "can not change sec during remount\n");
739 if (new_ctx->multiuser != old_ctx->multiuser) {
740 cifs_errorf(fc, "can not change multiuser during remount\n");
744 (!old_ctx->UNC || strcmp(new_ctx->UNC, old_ctx->UNC))) {
745 cifs_errorf(fc, "can not change UNC during remount\n");
748 if (new_ctx->username &&
749 (!old_ctx->username || strcmp(new_ctx->username, old_ctx->username))) {
750 cifs_errorf(fc, "can not change username during remount\n");
753 if (new_ctx->password &&
754 (!old_ctx->password || strcmp(new_ctx->password, old_ctx->password))) {
755 cifs_errorf(fc, "can not change password during remount\n");
758 if (new_ctx->domainname &&
759 (!old_ctx->domainname || strcmp(new_ctx->domainname, old_ctx->domainname))) {
760 cifs_errorf(fc, "can not change domainname during remount\n");
763 if (new_ctx->workstation_name &&
764 (!old_ctx->workstation_name || strcmp(new_ctx->workstation_name, old_ctx->workstation_name))) {
765 cifs_errorf(fc, "can not change workstation_name during remount\n");
768 if (new_ctx->nodename &&
769 (!old_ctx->nodename || strcmp(new_ctx->nodename, old_ctx->nodename))) {
770 cifs_errorf(fc, "can not change nodename during remount\n");
773 if (new_ctx->iocharset &&
774 (!old_ctx->iocharset || strcmp(new_ctx->iocharset, old_ctx->iocharset))) {
775 cifs_errorf(fc, "can not change iocharset during remount\n");
782 #define STEAL_STRING(cifs_sb, ctx, field) \
785 ctx->field = cifs_sb->ctx->field; \
786 cifs_sb->ctx->field = NULL; \
789 static int smb3_reconfigure(struct fs_context *fc)
791 struct smb3_fs_context *ctx = smb3_fc2context(fc);
792 struct dentry *root = fc->root;
793 struct cifs_sb_info *cifs_sb = CIFS_SB(root->d_sb);
796 rc = smb3_verify_reconfigure_ctx(fc, ctx, cifs_sb->ctx);
801 * We can not change UNC/username/password/domainname/
802 * workstation_name/nodename/iocharset
803 * during reconnect so ignore what we have in the new context and
804 * just use what we already have in cifs_sb->ctx.
806 STEAL_STRING(cifs_sb, ctx, UNC);
807 STEAL_STRING(cifs_sb, ctx, source);
808 STEAL_STRING(cifs_sb, ctx, username);
809 STEAL_STRING(cifs_sb, ctx, password);
810 STEAL_STRING(cifs_sb, ctx, domainname);
811 STEAL_STRING(cifs_sb, ctx, workstation_name);
812 STEAL_STRING(cifs_sb, ctx, nodename);
813 STEAL_STRING(cifs_sb, ctx, iocharset);
815 /* if rsize or wsize not passed in on remount, use previous values */
817 ctx->rsize = cifs_sb->ctx->rsize;
819 ctx->wsize = cifs_sb->ctx->wsize;
822 smb3_cleanup_fs_context_contents(cifs_sb->ctx);
823 rc = smb3_fs_context_dup(cifs_sb->ctx, ctx);
824 smb3_update_mnt_flags(cifs_sb);
825 #ifdef CONFIG_CIFS_DFS_UPCALL
827 rc = dfs_cache_remount_fs(cifs_sb);
833 static int smb3_fs_context_parse_param(struct fs_context *fc,
834 struct fs_parameter *param)
836 struct fs_parse_result result;
837 struct smb3_fs_context *ctx = smb3_fc2context(fc);
839 bool is_smb3 = !strcmp(fc->fs_type->name, "smb3");
840 bool skip_parsing = false;
844 cifs_dbg(FYI, "CIFS: parsing cifs mount option '%s'\n", param->key);
847 * fs_parse can not handle string options with an empty value so
848 * we will need special handling of them.
850 if (param->type == fs_value_is_string && param->string[0] == 0) {
851 if (!strcmp("pass", param->key) || !strcmp("password", param->key)) {
854 } else if (!strcmp("user", param->key) || !strcmp("username", param->key)) {
861 opt = fs_parse(fc, smb3_fs_parameters, param, &result);
863 return ctx->sloppy ? 1 : opt;
868 ctx->compression = UNKNOWN_TYPE;
870 "SMB3 compression support is experimental\n");
892 ctx->sfu_remap = false; /* disable SFU mapping */
903 ctx->override_uid = 0;
905 ctx->override_uid = 1;
909 ctx->override_gid = 0;
911 ctx->override_gid = 1;
931 case Opt_noblocksend:
943 case Opt_multichannel:
944 if (result.negated) {
945 ctx->multichannel = false;
946 ctx->max_channels = 1;
948 ctx->multichannel = true;
949 /* if number of channels not specified, default to 2 */
950 if (ctx->max_channels < 2)
951 ctx->max_channels = 2;
955 uid = make_kuid(current_user_ns(), result.uint_32);
957 goto cifs_parse_mount_err;
958 ctx->linux_uid = uid;
959 ctx->uid_specified = true;
962 uid = make_kuid(current_user_ns(), result.uint_32);
964 goto cifs_parse_mount_err;
966 ctx->cruid_specified = true;
969 uid = make_kuid(current_user_ns(), result.uint_32);
971 goto cifs_parse_mount_err;
972 ctx->backupuid = uid;
973 ctx->backupuid_specified = true;
976 gid = make_kgid(current_user_ns(), result.uint_32);
978 goto cifs_parse_mount_err;
979 ctx->backupgid = gid;
980 ctx->backupgid_specified = true;
983 gid = make_kgid(current_user_ns(), result.uint_32);
985 goto cifs_parse_mount_err;
986 ctx->linux_gid = gid;
987 ctx->gid_specified = true;
990 ctx->port = result.uint_32;
993 ctx->file_mode = result.uint_32;
996 ctx->dir_mode = result.uint_32;
998 case Opt_min_enc_offload:
999 ctx->min_offload = result.uint_32;
1003 * inode blocksize realistically should never need to be
1004 * less than 16K or greater than 16M and default is 1MB.
1005 * Note that small inode block sizes (e.g. 64K) can lead
1006 * to very poor performance of common tools like cp and scp
1008 if ((result.uint_32 < CIFS_MAX_MSGSIZE) ||
1009 (result.uint_32 > (4 * SMB3_DEFAULT_IOSIZE))) {
1010 cifs_errorf(fc, "%s: Invalid blocksize\n",
1012 goto cifs_parse_mount_err;
1014 ctx->bsize = result.uint_32;
1015 ctx->got_bsize = true;
1019 * readahead size realistically should never need to be
1020 * less than 1M (CIFS_DEFAULT_IOSIZE) or greater than 32M
1021 * (perhaps an exception should be considered in the
1022 * for the case of a large number of channels
1023 * when multichannel is negotiated) since that would lead
1024 * to plenty of parallel I/O in flight to the server.
1025 * Note that smaller read ahead sizes would
1026 * hurt performance of common tools like cp and scp
1027 * which often trigger sequential i/o with read ahead
1029 if ((result.uint_32 > (8 * SMB3_DEFAULT_IOSIZE)) ||
1030 (result.uint_32 < CIFS_DEFAULT_IOSIZE)) {
1031 cifs_errorf(fc, "%s: Invalid rasize %d vs. %d\n",
1032 __func__, result.uint_32, SMB3_DEFAULT_IOSIZE);
1033 goto cifs_parse_mount_err;
1035 ctx->rasize = result.uint_32;
1038 ctx->rsize = result.uint_32;
1039 ctx->got_rsize = true;
1042 ctx->wsize = result.uint_32;
1043 ctx->got_wsize = true;
1046 ctx->acregmax = HZ * result.uint_32;
1047 if (ctx->acregmax > CIFS_MAX_ACTIMEO) {
1048 cifs_errorf(fc, "acregmax too large\n");
1049 goto cifs_parse_mount_err;
1053 ctx->acdirmax = HZ * result.uint_32;
1054 if (ctx->acdirmax > CIFS_MAX_ACTIMEO) {
1055 cifs_errorf(fc, "acdirmax too large\n");
1056 goto cifs_parse_mount_err;
1060 if (HZ * result.uint_32 > CIFS_MAX_ACTIMEO) {
1061 cifs_errorf(fc, "timeout too large\n");
1062 goto cifs_parse_mount_err;
1064 if ((ctx->acdirmax != CIFS_DEF_ACTIMEO) ||
1065 (ctx->acregmax != CIFS_DEF_ACTIMEO)) {
1066 cifs_errorf(fc, "actimeo ignored since acregmax or acdirmax specified\n");
1069 ctx->acdirmax = ctx->acregmax = HZ * result.uint_32;
1071 case Opt_echo_interval:
1072 ctx->echo_interval = result.uint_32;
1075 ctx->snapshot_time = result.uint_32;
1077 case Opt_max_credits:
1078 if (result.uint_32 < 20 || result.uint_32 > 60000) {
1079 cifs_errorf(fc, "%s: Invalid max_credits value\n",
1081 goto cifs_parse_mount_err;
1083 ctx->max_credits = result.uint_32;
1085 case Opt_max_channels:
1086 if (result.uint_32 < 1 || result.uint_32 > CIFS_MAX_CHANNELS) {
1087 cifs_errorf(fc, "%s: Invalid max_channels value, needs to be 1-%d\n",
1088 __func__, CIFS_MAX_CHANNELS);
1089 goto cifs_parse_mount_err;
1091 ctx->max_channels = result.uint_32;
1092 /* If more than one channel requested ... they want multichan */
1093 if (result.uint_32 > 1)
1094 ctx->multichannel = true;
1096 case Opt_handletimeout:
1097 ctx->handle_timeout = result.uint_32;
1098 if (ctx->handle_timeout > SMB3_MAX_HANDLE_TIMEOUT) {
1099 cifs_errorf(fc, "Invalid handle cache timeout, longer than 16 minutes\n");
1100 goto cifs_parse_mount_err;
1106 switch (smb3_parse_devname(param->string, ctx)) {
1110 cifs_errorf(fc, "Unable to allocate memory for devname\n");
1111 goto cifs_parse_mount_err;
1113 cifs_errorf(fc, "Malformed UNC in devname\n");
1114 goto cifs_parse_mount_err;
1116 cifs_errorf(fc, "Unknown error parsing devname\n");
1117 goto cifs_parse_mount_err;
1119 ctx->source = kstrdup(param->string, GFP_KERNEL);
1120 if (ctx->source == NULL) {
1121 cifs_errorf(fc, "OOM when copying UNC string\n");
1122 goto cifs_parse_mount_err;
1124 fc->source = kstrdup(param->string, GFP_KERNEL);
1125 if (fc->source == NULL) {
1126 cifs_errorf(fc, "OOM when copying UNC string\n");
1127 goto cifs_parse_mount_err;
1131 kfree(ctx->username);
1132 ctx->username = NULL;
1133 if (strlen(param->string) == 0) {
1134 /* null user, ie. anonymous authentication */
1139 if (strnlen(param->string, CIFS_MAX_USERNAME_LEN) >
1140 CIFS_MAX_USERNAME_LEN) {
1141 pr_warn("username too long\n");
1142 goto cifs_parse_mount_err;
1144 ctx->username = kstrdup(param->string, GFP_KERNEL);
1145 if (ctx->username == NULL) {
1146 cifs_errorf(fc, "OOM when copying username string\n");
1147 goto cifs_parse_mount_err;
1151 kfree(ctx->password);
1152 ctx->password = NULL;
1153 if (strlen(param->string) == 0)
1156 ctx->password = kstrdup(param->string, GFP_KERNEL);
1157 if (ctx->password == NULL) {
1158 cifs_errorf(fc, "OOM when copying password string\n");
1159 goto cifs_parse_mount_err;
1163 if (strlen(param->string) == 0) {
1164 ctx->got_ip = false;
1167 if (!cifs_convert_address((struct sockaddr *)&ctx->dstaddr,
1169 strlen(param->string))) {
1170 pr_err("bad ip= option (%s)\n", param->string);
1171 goto cifs_parse_mount_err;
1176 if (strnlen(param->string, CIFS_MAX_DOMAINNAME_LEN)
1177 == CIFS_MAX_DOMAINNAME_LEN) {
1178 pr_warn("domain name too long\n");
1179 goto cifs_parse_mount_err;
1182 kfree(ctx->domainname);
1183 ctx->domainname = kstrdup(param->string, GFP_KERNEL);
1184 if (ctx->domainname == NULL) {
1185 cifs_errorf(fc, "OOM when copying domainname string\n");
1186 goto cifs_parse_mount_err;
1188 cifs_dbg(FYI, "Domain name set\n");
1191 if (!cifs_convert_address(
1192 (struct sockaddr *)&ctx->srcaddr,
1193 param->string, strlen(param->string))) {
1194 pr_warn("Could not parse srcaddr: %s\n",
1196 goto cifs_parse_mount_err;
1200 if (strnlen(param->string, 1024) >= 65) {
1201 pr_warn("iocharset name too long\n");
1202 goto cifs_parse_mount_err;
1205 if (strncasecmp(param->string, "default", 7) != 0) {
1206 kfree(ctx->iocharset);
1207 ctx->iocharset = kstrdup(param->string, GFP_KERNEL);
1208 if (ctx->iocharset == NULL) {
1209 cifs_errorf(fc, "OOM when copying iocharset string\n");
1210 goto cifs_parse_mount_err;
1213 /* if iocharset not set then load_nls_default
1216 cifs_dbg(FYI, "iocharset set to %s\n", ctx->iocharset);
1218 case Opt_netbiosname:
1219 memset(ctx->source_rfc1001_name, 0x20,
1222 * FIXME: are there cases in which a comma can
1223 * be valid in workstation netbios name (and
1224 * need special handling)?
1226 for (i = 0; i < RFC1001_NAME_LEN; i++) {
1227 /* don't ucase netbiosname for user */
1228 if (param->string[i] == 0)
1230 ctx->source_rfc1001_name[i] = param->string[i];
1232 /* The string has 16th byte zero still from
1233 * set at top of the function
1235 if (i == RFC1001_NAME_LEN && param->string[i] != 0)
1236 pr_warn("netbiosname longer than 15 truncated\n");
1239 /* last byte, type, is 0x20 for servr type */
1240 memset(ctx->target_rfc1001_name, 0x20,
1241 RFC1001_NAME_LEN_WITH_NULL);
1243 * BB are there cases in which a comma can be valid in this
1244 * workstation netbios name (and need special handling)?
1247 /* user or mount helper must uppercase the netbios name */
1248 for (i = 0; i < 15; i++) {
1249 if (param->string[i] == 0)
1251 ctx->target_rfc1001_name[i] = param->string[i];
1254 /* The string has 16th byte zero still from set at top of function */
1255 if (i == RFC1001_NAME_LEN && param->string[i] != 0)
1256 pr_warn("server netbiosname longer than 15 truncated\n");
1259 /* version of mount userspace tools, not dialect */
1260 /* If interface changes in mount.cifs bump to new ver */
1261 if (strncasecmp(param->string, "1", 1) == 0) {
1262 if (strlen(param->string) > 1) {
1263 pr_warn("Bad mount helper ver=%s. Did you want SMB1 (CIFS) dialect and mean to type vers=1.0 instead?\n",
1265 goto cifs_parse_mount_err;
1267 /* This is the default */
1270 /* For all other value, error */
1271 pr_warn("Invalid mount helper version specified\n");
1272 goto cifs_parse_mount_err;
1274 /* protocol version (dialect) */
1275 if (cifs_parse_smb_version(fc, param->string, ctx, is_smb3) != 0)
1276 goto cifs_parse_mount_err;
1277 ctx->got_version = true;
1280 if (cifs_parse_security_flavors(fc, param->string, ctx) != 0)
1281 goto cifs_parse_mount_err;
1284 if (cifs_parse_cache_flavor(fc, param->string, ctx) != 0)
1285 goto cifs_parse_mount_err;
1288 #ifndef CONFIG_CIFS_SWN_UPCALL
1289 cifs_errorf(fc, "Witness support needs CONFIG_CIFS_SWN_UPCALL config option\n");
1290 goto cifs_parse_mount_err;
1292 ctx->witness = true;
1293 pr_warn_once("Witness protocol support is experimental\n");
1296 #ifndef CONFIG_CIFS_ROOT
1297 cifs_dbg(VFS, "rootfs support requires CONFIG_CIFS_ROOT config option\n");
1298 goto cifs_parse_mount_err;
1302 case Opt_posixpaths:
1304 ctx->posix_paths = 0;
1306 ctx->posix_paths = 1;
1309 if (result.negated) {
1310 if (ctx->linux_ext == 1)
1311 pr_warn_once("conflicting posix mount options specified\n");
1313 ctx->no_linux_ext = 1;
1315 if (ctx->no_linux_ext == 1)
1316 pr_warn_once("conflicting posix mount options specified\n");
1318 ctx->no_linux_ext = 0;
1325 if (result.negated) {
1327 * turn off mandatory locking in mode
1328 * if remote locking is turned off since the
1329 * local vfs will do advisory
1331 if (ctx->file_mode ==
1332 (S_IALLUGO & ~(S_ISUID | S_IXGRP)))
1333 ctx->file_mode = S_IALLUGO;
1338 case Opt_handlecache:
1340 ctx->nohandlecache = 1;
1342 ctx->nohandlecache = 0;
1344 case Opt_forcemandatorylock:
1348 ctx->setuids = result.negated;
1351 ctx->intr = !result.negated;
1353 case Opt_setuidfromacl:
1354 ctx->setuidfromacl = 1;
1356 case Opt_strictsync:
1357 ctx->nostrictsync = result.negated;
1360 ctx->server_ino = !result.negated;
1362 case Opt_rwpidforward:
1363 ctx->rwpidforward = 1;
1369 ctx->cifs_acl = !result.negated;
1372 ctx->no_psx_acl = result.negated;
1374 case Opt_locallease:
1375 ctx->local_lease = 1;
1380 case Opt_ignore_signature:
1382 ctx->ignore_signature = true;
1385 /* we do not do the following in secFlags because seal
1386 * is a per tree connection (mount) not a per socket
1387 * or per-smb connection option in the protocol
1388 * vol->secFlg |= CIFSSEC_MUST_SEAL;
1393 pr_warn("Mount option noac not supported. Instead set /proc/fs/cifs/LookupCacheEnabled to 0\n");
1396 #ifndef CONFIG_CIFS_FSCACHE
1397 cifs_errorf(fc, "FS-Cache support needs CONFIG_CIFS_FSCACHE kernel config option set\n");
1398 goto cifs_parse_mount_err;
1402 case Opt_mfsymlinks:
1403 ctx->mfsymlinks = true;
1406 ctx->multiuser = true;
1411 case Opt_nosharesock:
1412 ctx->nosharesock = true;
1414 case Opt_persistent:
1415 if (result.negated) {
1416 ctx->nopersistent = true;
1417 if (ctx->persistent) {
1418 cifs_errorf(fc, "persistenthandles mount options conflict\n");
1419 goto cifs_parse_mount_err;
1422 ctx->persistent = true;
1423 if ((ctx->nopersistent) || (ctx->resilient)) {
1424 cifs_errorf(fc, "persistenthandles mount options conflict\n");
1425 goto cifs_parse_mount_err;
1430 if (result.negated) {
1431 ctx->resilient = false; /* already the default */
1433 ctx->resilient = true;
1434 if (ctx->persistent) {
1435 cifs_errorf(fc, "persistenthandles mount options conflict\n");
1436 goto cifs_parse_mount_err;
1440 case Opt_tcp_nodelay:
1441 /* tcp nodelay should not usually be needed since we CORK/UNCORK the socket */
1443 ctx->sockopt_tcp_nodelay = false;
1445 ctx->sockopt_tcp_nodelay = true;
1447 case Opt_domainauto:
1448 ctx->domainauto = true;
1454 /* case Opt_ignore: - is ignored as expected ... */
1458 cifs_parse_mount_err:
1462 int smb3_init_fs_context(struct fs_context *fc)
1465 struct smb3_fs_context *ctx;
1466 char *nodename = utsname()->nodename;
1469 ctx = kzalloc(sizeof(struct smb3_fs_context), GFP_KERNEL);
1470 if (unlikely(!ctx)) {
1475 ctx->workstation_name = kstrdup(nodename, GFP_KERNEL);
1476 if (unlikely(!ctx->workstation_name)) {
1482 * does not have to be perfect mapping since field is
1483 * informational, only used for servers that do not support
1484 * port 445 and it can be overridden at mount time
1486 memset(ctx->source_rfc1001_name, 0x20, RFC1001_NAME_LEN);
1487 for (i = 0; i < strnlen(nodename, RFC1001_NAME_LEN); i++)
1488 ctx->source_rfc1001_name[i] = toupper(nodename[i]);
1490 ctx->source_rfc1001_name[RFC1001_NAME_LEN] = 0;
1492 * null target name indicates to use *SMBSERVR default called name
1493 * if we end up sending RFC1001 session initialize
1495 ctx->target_rfc1001_name[0] = 0;
1496 ctx->cred_uid = current_uid();
1497 ctx->linux_uid = current_uid();
1498 ctx->linux_gid = current_gid();
1499 /* By default 4MB read ahead size, 1MB block size */
1500 ctx->bsize = CIFS_DEFAULT_IOSIZE; /* can improve cp performance significantly */
1501 ctx->rasize = 0; /* 0 = use default (ie negotiated rsize) for read ahead pages */
1504 * default to SFM style remapping of seven reserved characters
1505 * unless user overrides it or we negotiate CIFS POSIX where
1506 * it is unnecessary. Can not simultaneously use more than one mapping
1507 * since then readdir could list files that open could not open
1511 /* default to only allowing write access to owner of the mount */
1512 ctx->dir_mode = ctx->file_mode = S_IRUGO | S_IXUGO | S_IWUSR;
1514 /* ctx->retry default is 0 (i.e. "soft" limited retry not hard retry) */
1515 /* default is always to request posix paths. */
1516 ctx->posix_paths = 1;
1517 /* default to using server inode numbers where available */
1518 ctx->server_ino = 1;
1520 /* default is to use strict cifs caching semantics */
1521 ctx->strict_io = true;
1523 ctx->acregmax = CIFS_DEF_ACTIMEO;
1524 ctx->acdirmax = CIFS_DEF_ACTIMEO;
1526 /* Most clients set timeout to 0, allows server to use its default */
1527 ctx->handle_timeout = 0; /* See MS-SMB2 spec section 2.2.14.2.12 */
1529 /* offer SMB2.1 and later (SMB3 etc). Secure and widely accepted */
1530 ctx->ops = &smb30_operations;
1531 ctx->vals = &smbdefault_values;
1533 ctx->echo_interval = SMB_ECHO_INTERVAL_DEFAULT;
1535 /* default to no multichannel (single server connection) */
1536 ctx->multichannel = false;
1537 ctx->max_channels = 1;
1539 ctx->backupuid_specified = false; /* no backup intent for a user */
1540 ctx->backupgid_specified = false; /* no backup intent for a group */
1543 * short int override_uid = -1;
1544 * short int override_gid = -1;
1545 * char *nodename = strdup(utsname()->nodename);
1546 * struct sockaddr *dstaddr = (struct sockaddr *)&vol->dstaddr;
1549 fc->fs_private = ctx;
1550 fc->ops = &smb3_fs_context_ops;
1555 kfree(ctx->workstation_name);
1563 smb3_cleanup_fs_context_contents(struct smb3_fs_context *ctx)
1569 * Make sure this stays in sync with smb3_fs_context_dup()
1571 kfree(ctx->mount_options);
1572 ctx->mount_options = NULL;
1573 kfree(ctx->username);
1574 ctx->username = NULL;
1575 kfree_sensitive(ctx->password);
1576 ctx->password = NULL;
1577 kfree(ctx->server_hostname);
1578 ctx->server_hostname = NULL;
1583 kfree(ctx->domainname);
1584 ctx->domainname = NULL;
1585 kfree(ctx->workstation_name);
1586 ctx->workstation_name = NULL;
1587 kfree(ctx->nodename);
1588 ctx->nodename = NULL;
1589 kfree(ctx->iocharset);
1590 ctx->iocharset = NULL;
1591 kfree(ctx->prepath);
1592 ctx->prepath = NULL;
1596 smb3_cleanup_fs_context(struct smb3_fs_context *ctx)
1600 smb3_cleanup_fs_context_contents(ctx);
1604 void smb3_update_mnt_flags(struct cifs_sb_info *cifs_sb)
1606 struct smb3_fs_context *ctx = cifs_sb->ctx;
1609 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_DFS;
1611 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_NO_DFS;
1614 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM;
1616 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_NO_PERM;
1619 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID;
1621 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SET_UID;
1623 if (ctx->setuidfromacl)
1624 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UID_FROM_ACL;
1626 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_UID_FROM_ACL;
1628 if (ctx->server_ino)
1629 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM;
1631 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SERVER_INUM;
1634 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SFM_CHR;
1636 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_MAP_SFM_CHR;
1639 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR;
1641 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_MAP_SPECIAL_CHR;
1644 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR;
1646 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_NO_XATTR;
1649 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL;
1651 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_UNX_EMUL;
1654 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL;
1656 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_NO_BRL;
1658 if (ctx->nohandlecache)
1659 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_HANDLE_CACHE;
1661 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_NO_HANDLE_CACHE;
1663 if (ctx->nostrictsync)
1664 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOSSYNC;
1666 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_NOSSYNC;
1669 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOPOSIXBRL;
1671 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_NOPOSIXBRL;
1673 if (ctx->rwpidforward)
1674 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_RWPIDFORWARD;
1676 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_RWPIDFORWARD;
1679 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MODE_FROM_SID;
1681 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_MODE_FROM_SID;
1684 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL;
1686 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_CIFS_ACL;
1688 if (ctx->backupuid_specified)
1689 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPUID;
1691 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_CIFS_BACKUPUID;
1693 if (ctx->backupgid_specified)
1694 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPGID;
1696 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_CIFS_BACKUPGID;
1698 if (ctx->override_uid)
1699 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID;
1701 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_OVERR_UID;
1703 if (ctx->override_gid)
1704 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID;
1706 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_OVERR_GID;
1709 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM;
1711 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_DYNPERM;
1714 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_FSCACHE;
1716 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_FSCACHE;
1719 cifs_sb->mnt_cifs_flags |= (CIFS_MOUNT_MULTIUSER |
1720 CIFS_MOUNT_NO_PERM);
1722 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_MULTIUSER;
1726 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_STRICT_IO;
1728 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_STRICT_IO;
1731 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO;
1733 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_DIRECT_IO;
1735 if (ctx->mfsymlinks)
1736 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MF_SYMLINKS;
1738 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_MF_SYMLINKS;
1739 if (ctx->mfsymlinks) {
1740 if (ctx->sfu_emul) {
1742 * Our SFU ("Services for Unix" emulation does not allow
1743 * creating symlinks but does allow reading existing SFU
1744 * symlinks (it does allow both creating and reading SFU
1745 * style mknod and FIFOs though). When "mfsymlinks" and
1746 * "sfu" are both enabled at the same time, it allows
1747 * reading both types of symlinks, but will only create
1748 * them with mfsymlinks format. This allows better
1749 * Apple compatibility (probably better for Samba too)
1750 * while still recognizing old Windows style symlinks.
1752 cifs_dbg(VFS, "mount options mfsymlinks and sfu both enabled\n");
1755 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SHUTDOWN;