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("domainauto", Opt_domainauto),
120 fsparam_flag("rdma", Opt_rdma),
121 fsparam_flag("modesid", Opt_modesid),
122 fsparam_flag("modefromsid", Opt_modesid),
123 fsparam_flag("rootfs", Opt_rootfs),
124 fsparam_flag("compress", Opt_compress),
125 fsparam_flag("witness", Opt_witness),
127 /* Mount options which take numeric value */
128 fsparam_u32("backupuid", Opt_backupuid),
129 fsparam_u32("backupgid", Opt_backupgid),
130 fsparam_u32("uid", Opt_uid),
131 fsparam_u32("cruid", Opt_cruid),
132 fsparam_u32("gid", Opt_gid),
133 fsparam_u32("file_mode", Opt_file_mode),
134 fsparam_u32("dirmode", Opt_dirmode),
135 fsparam_u32("dir_mode", Opt_dirmode),
136 fsparam_u32("port", Opt_port),
137 fsparam_u32("min_enc_offload", Opt_min_enc_offload),
138 fsparam_u32("esize", Opt_min_enc_offload),
139 fsparam_u32("bsize", Opt_blocksize),
140 fsparam_u32("rasize", Opt_rasize),
141 fsparam_u32("rsize", Opt_rsize),
142 fsparam_u32("wsize", Opt_wsize),
143 fsparam_u32("actimeo", Opt_actimeo),
144 fsparam_u32("acdirmax", Opt_acdirmax),
145 fsparam_u32("acregmax", Opt_acregmax),
146 fsparam_u32("closetimeo", Opt_closetimeo),
147 fsparam_u32("echo_interval", Opt_echo_interval),
148 fsparam_u32("max_credits", Opt_max_credits),
149 fsparam_u32("handletimeout", Opt_handletimeout),
150 fsparam_u64("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;
314 new_ctx->source = NULL;
315 new_ctx->iocharset = NULL;
317 * Make sure to stay in sync with smb3_cleanup_fs_context_contents()
319 DUP_CTX_STR(prepath);
320 DUP_CTX_STR(mount_options);
321 DUP_CTX_STR(username);
322 DUP_CTX_STR(password);
323 DUP_CTX_STR(server_hostname);
326 DUP_CTX_STR(domainname);
327 DUP_CTX_STR(nodename);
328 DUP_CTX_STR(iocharset);
334 cifs_parse_smb_version(struct fs_context *fc, char *value, struct smb3_fs_context *ctx, bool is_smb3)
336 substring_t args[MAX_OPT_ARGS];
338 switch (match_token(value, cifs_smb_version_tokens, args)) {
339 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
341 if (disable_legacy_dialects) {
342 cifs_errorf(fc, "mount with legacy dialect disabled\n");
346 cifs_errorf(fc, "vers=1.0 (cifs) not permitted when mounting with smb3\n");
349 cifs_errorf(fc, "Use of the less secure dialect vers=1.0 is not recommended unless required for access to very old servers\n");
350 ctx->ops = &smb1_operations;
351 ctx->vals = &smb1_values;
354 if (disable_legacy_dialects) {
355 cifs_errorf(fc, "mount with legacy dialect disabled\n");
359 cifs_errorf(fc, "vers=2.0 not permitted when mounting with smb3\n");
362 ctx->ops = &smb20_operations;
363 ctx->vals = &smb20_values;
367 cifs_errorf(fc, "vers=1.0 (cifs) mount not permitted when legacy dialects disabled\n");
370 cifs_errorf(fc, "vers=2.0 mount not permitted when legacy dialects disabled\n");
372 #endif /* CIFS_ALLOW_INSECURE_LEGACY */
374 ctx->ops = &smb21_operations;
375 ctx->vals = &smb21_values;
378 ctx->ops = &smb30_operations;
379 ctx->vals = &smb30_values;
382 ctx->ops = &smb30_operations; /* currently identical with 3.0 */
383 ctx->vals = &smb302_values;
386 ctx->ops = &smb311_operations;
387 ctx->vals = &smb311_values;
390 ctx->ops = &smb30_operations; /* currently identical with 3.0 */
391 ctx->vals = &smb3any_values;
394 ctx->ops = &smb30_operations;
395 ctx->vals = &smbdefault_values;
398 cifs_errorf(fc, "Unknown vers= option specified: %s\n", value);
404 int smb3_parse_opt(const char *options, const char *key, char **val)
407 char *opts, *orig, *p;
409 orig = opts = kstrdup(options, GFP_KERNEL);
413 while ((p = strsep(&opts, ","))) {
418 if (strncasecmp(p, key, strlen(key)))
420 nval = strchr(p, '=');
425 *val = kstrdup(nval, GFP_KERNEL);
426 rc = !*val ? -ENOMEM : 0;
436 * Remove duplicate path delimiters. Windows is supposed to do that
437 * but there are some bugs that prevent rename from working if there are
438 * multiple delimiters.
440 * Returns a sanitized duplicate of @path. @gfp indicates the GFP_* flags
442 * The caller is responsible for freeing the original.
444 #define IS_DELIM(c) ((c) == '/' || (c) == '\\')
445 char *cifs_sanitize_prepath(char *prepath, gfp_t gfp)
447 char *cursor1 = prepath, *cursor2 = prepath;
449 /* skip all prepended delimiters */
450 while (IS_DELIM(*cursor1))
453 /* copy the first letter */
456 /* copy the remainder... */
457 while (*(cursor1++)) {
458 /* ... skipping all duplicated delimiters */
459 if (IS_DELIM(*cursor1) && IS_DELIM(*cursor2))
461 *(++cursor2) = *cursor1;
464 /* if the last character is a delimiter, skip it */
465 if (IS_DELIM(*(cursor2 - 1)))
469 return kstrdup(prepath, gfp);
473 * Parse a devname into substrings and populate the ctx->UNC and ctx->prepath
474 * fields with the result. Returns 0 on success and an error otherwise
475 * (e.g. ENOMEM or EINVAL)
478 smb3_parse_devname(const char *devname, struct smb3_fs_context *ctx)
481 const char *delims = "/\\";
484 if (unlikely(!devname || !*devname)) {
485 cifs_dbg(VFS, "Device name not specified\n");
489 /* make sure we have a valid UNC double delimiter prefix */
490 len = strspn(devname, delims);
494 /* find delimiter between host and sharename */
495 pos = strpbrk(devname + 2, delims);
499 /* record the server hostname */
500 kfree(ctx->server_hostname);
501 ctx->server_hostname = kstrndup(devname + 2, pos - devname - 2, GFP_KERNEL);
502 if (!ctx->server_hostname)
505 /* skip past delimiter */
508 /* now go until next delimiter or end of string */
509 len = strcspn(pos, delims);
511 /* move "pos" up to delimiter or NULL */
514 ctx->UNC = kstrndup(devname, pos - devname, GFP_KERNEL);
518 convert_delimiter(ctx->UNC, '\\');
520 /* skip any delimiter */
521 if (*pos == '/' || *pos == '\\')
527 /* If pos is NULL then no prepath */
531 ctx->prepath = cifs_sanitize_prepath(pos, GFP_KERNEL);
538 static void smb3_fs_context_free(struct fs_context *fc);
539 static int smb3_fs_context_parse_param(struct fs_context *fc,
540 struct fs_parameter *param);
541 static int smb3_fs_context_parse_monolithic(struct fs_context *fc,
543 static int smb3_get_tree(struct fs_context *fc);
544 static int smb3_reconfigure(struct fs_context *fc);
546 static const struct fs_context_operations smb3_fs_context_ops = {
547 .free = smb3_fs_context_free,
548 .parse_param = smb3_fs_context_parse_param,
549 .parse_monolithic = smb3_fs_context_parse_monolithic,
550 .get_tree = smb3_get_tree,
551 .reconfigure = smb3_reconfigure,
555 * Parse a monolithic block of data from sys_mount().
556 * smb3_fs_context_parse_monolithic - Parse key[=val][,key[=val]]* mount data
557 * @ctx: The superblock configuration to fill in.
558 * @data: The data to parse
560 * Parse a blob of data that's in key[=val][,key[=val]]* form. This can be
561 * called from the ->monolithic_mount_data() fs_context operation.
563 * Returns 0 on success or the error returned by the ->parse_option() fs_context
564 * operation on failure.
566 static int smb3_fs_context_parse_monolithic(struct fs_context *fc,
569 struct smb3_fs_context *ctx = smb3_fc2context(fc);
570 char *options = data, *key;
576 ctx->mount_options = kstrdup(data, GFP_KERNEL);
577 if (ctx->mount_options == NULL)
580 ret = security_sb_eat_lsm_opts(options, &fc->security);
584 /* BB Need to add support for sep= here TBD */
585 while ((key = strsep(&options, ",")) != NULL) {
592 /* Check if following character is the deliminator If yes,
593 * we have encountered a double deliminator reset the NULL
594 * character to the deliminator
596 while (options && options[0] == ',') {
598 strcpy(key + len, options);
599 options = strchr(options, ',');
606 value = strchr(key, '=');
614 ret = vfs_parse_fs_string(fc, key, value, len);
623 * Validate the preparsed information in the config.
625 static int smb3_fs_context_validate(struct fs_context *fc)
627 struct smb3_fs_context *ctx = smb3_fc2context(fc);
629 if (ctx->rdma && ctx->vals->protocol_id < SMB30_PROT_ID) {
630 cifs_errorf(fc, "SMB Direct requires Version >=3.0\n");
635 /* Muliuser mounts require CONFIG_KEYS support */
636 if (ctx->multiuser) {
637 cifs_errorf(fc, "Multiuser mounts require kernels with CONFIG_KEYS enabled\n");
642 if (ctx->got_version == false)
643 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");
647 cifs_errorf(fc, "CIFS mount error: No usable UNC path provided in device string!\n");
651 /* make sure UNC has a share name */
652 if (strlen(ctx->UNC) < 3 || !strchr(ctx->UNC + 3, '\\')) {
653 cifs_errorf(fc, "Malformed UNC. Unable to find share name.\n");
661 /* No ip= option specified? Try to get it from UNC */
662 /* Use the address part of the UNC. */
663 slash = strchr(&ctx->UNC[2], '\\');
664 len = slash - &ctx->UNC[2];
665 if (!cifs_convert_address((struct sockaddr *)&ctx->dstaddr,
666 &ctx->UNC[2], len)) {
667 pr_err("Unable to determine destination address\n");
668 return -EHOSTUNREACH;
672 /* set the port that we got earlier */
673 cifs_set_port((struct sockaddr *)&ctx->dstaddr, ctx->port);
675 if (ctx->override_uid && !ctx->uid_specified) {
676 ctx->override_uid = 0;
677 pr_notice("ignoring forceuid mount option specified with no uid= option\n");
680 if (ctx->override_gid && !ctx->gid_specified) {
681 ctx->override_gid = 0;
682 pr_notice("ignoring forcegid mount option specified with no gid= option\n");
688 static int smb3_get_tree_common(struct fs_context *fc)
690 struct smb3_fs_context *ctx = smb3_fc2context(fc);
694 root = cifs_smb3_do_mount(fc->fs_type, 0, ctx);
696 return PTR_ERR(root);
704 * Create an SMB3 superblock from the parameters passed.
706 static int smb3_get_tree(struct fs_context *fc)
708 int err = smb3_fs_context_validate(fc);
712 return smb3_get_tree_common(fc);
715 static void smb3_fs_context_free(struct fs_context *fc)
717 struct smb3_fs_context *ctx = smb3_fc2context(fc);
719 smb3_cleanup_fs_context(ctx);
723 * Compare the old and new proposed context during reconfigure
724 * and check if the changes are compatible.
726 static int smb3_verify_reconfigure_ctx(struct fs_context *fc,
727 struct smb3_fs_context *new_ctx,
728 struct smb3_fs_context *old_ctx)
730 if (new_ctx->posix_paths != old_ctx->posix_paths) {
731 cifs_errorf(fc, "can not change posixpaths during remount\n");
734 if (new_ctx->sectype != old_ctx->sectype) {
735 cifs_errorf(fc, "can not change sec during remount\n");
738 if (new_ctx->multiuser != old_ctx->multiuser) {
739 cifs_errorf(fc, "can not change multiuser during remount\n");
743 (!old_ctx->UNC || strcmp(new_ctx->UNC, old_ctx->UNC))) {
744 cifs_errorf(fc, "can not change UNC during remount\n");
747 if (new_ctx->username &&
748 (!old_ctx->username || strcmp(new_ctx->username, old_ctx->username))) {
749 cifs_errorf(fc, "can not change username during remount\n");
752 if (new_ctx->password &&
753 (!old_ctx->password || strcmp(new_ctx->password, old_ctx->password))) {
754 cifs_errorf(fc, "can not change password during remount\n");
757 if (new_ctx->domainname &&
758 (!old_ctx->domainname || strcmp(new_ctx->domainname, old_ctx->domainname))) {
759 cifs_errorf(fc, "can not change domainname during remount\n");
762 if (new_ctx->nodename &&
763 (!old_ctx->nodename || strcmp(new_ctx->nodename, old_ctx->nodename))) {
764 cifs_errorf(fc, "can not change nodename during remount\n");
767 if (new_ctx->iocharset &&
768 (!old_ctx->iocharset || strcmp(new_ctx->iocharset, old_ctx->iocharset))) {
769 cifs_errorf(fc, "can not change iocharset during remount\n");
776 #define STEAL_STRING(cifs_sb, ctx, field) \
779 ctx->field = cifs_sb->ctx->field; \
780 cifs_sb->ctx->field = NULL; \
783 static int smb3_reconfigure(struct fs_context *fc)
785 struct smb3_fs_context *ctx = smb3_fc2context(fc);
786 struct dentry *root = fc->root;
787 struct cifs_sb_info *cifs_sb = CIFS_SB(root->d_sb);
790 rc = smb3_verify_reconfigure_ctx(fc, ctx, cifs_sb->ctx);
795 * We can not change UNC/username/password/domainname/nodename/iocharset
796 * during reconnect so ignore what we have in the new context and
797 * just use what we already have in cifs_sb->ctx.
799 STEAL_STRING(cifs_sb, ctx, UNC);
800 STEAL_STRING(cifs_sb, ctx, source);
801 STEAL_STRING(cifs_sb, ctx, username);
802 STEAL_STRING(cifs_sb, ctx, password);
803 STEAL_STRING(cifs_sb, ctx, domainname);
804 STEAL_STRING(cifs_sb, ctx, nodename);
805 STEAL_STRING(cifs_sb, ctx, iocharset);
807 /* if rsize or wsize not passed in on remount, use previous values */
809 ctx->rsize = cifs_sb->ctx->rsize;
811 ctx->wsize = cifs_sb->ctx->wsize;
814 smb3_cleanup_fs_context_contents(cifs_sb->ctx);
815 rc = smb3_fs_context_dup(cifs_sb->ctx, ctx);
816 smb3_update_mnt_flags(cifs_sb);
817 #ifdef CONFIG_CIFS_DFS_UPCALL
819 rc = dfs_cache_remount_fs(cifs_sb);
825 static int smb3_fs_context_parse_param(struct fs_context *fc,
826 struct fs_parameter *param)
828 struct fs_parse_result result;
829 struct smb3_fs_context *ctx = smb3_fc2context(fc);
831 bool is_smb3 = !strcmp(fc->fs_type->name, "smb3");
832 bool skip_parsing = false;
836 cifs_dbg(FYI, "CIFS: parsing cifs mount option '%s'\n", param->key);
839 * fs_parse can not handle string options with an empty value so
840 * we will need special handling of them.
842 if (param->type == fs_value_is_string && param->string[0] == 0) {
843 if (!strcmp("pass", param->key) || !strcmp("password", param->key)) {
846 } else if (!strcmp("user", param->key) || !strcmp("username", param->key)) {
853 opt = fs_parse(fc, smb3_fs_parameters, param, &result);
855 return ctx->sloppy ? 1 : opt;
860 ctx->compression = UNKNOWN_TYPE;
862 "SMB3 compression support is experimental\n");
884 ctx->sfu_remap = false; /* disable SFU mapping */
889 ctx->sfu_remap = false;
891 ctx->sfu_remap = true;
892 ctx->remap = false; /* disable SFM (mapposix) 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_closetimeo:
1072 ctx->closetimeo = HZ * result.uint_32;
1073 if (ctx->closetimeo > SMB3_MAX_DCLOSETIMEO) {
1074 cifs_errorf(fc, "closetimeo too large\n");
1075 goto cifs_parse_mount_err;
1078 case Opt_echo_interval:
1079 ctx->echo_interval = result.uint_32;
1082 ctx->snapshot_time = result.uint_64;
1084 case Opt_max_credits:
1085 if (result.uint_32 < 20 || result.uint_32 > 60000) {
1086 cifs_errorf(fc, "%s: Invalid max_credits value\n",
1088 goto cifs_parse_mount_err;
1090 ctx->max_credits = result.uint_32;
1092 case Opt_max_channels:
1093 if (result.uint_32 < 1 || result.uint_32 > CIFS_MAX_CHANNELS) {
1094 cifs_errorf(fc, "%s: Invalid max_channels value, needs to be 1-%d\n",
1095 __func__, CIFS_MAX_CHANNELS);
1096 goto cifs_parse_mount_err;
1098 ctx->max_channels = result.uint_32;
1099 /* If more than one channel requested ... they want multichan */
1100 if (result.uint_32 > 1)
1101 ctx->multichannel = true;
1103 case Opt_handletimeout:
1104 ctx->handle_timeout = result.uint_32;
1105 if (ctx->handle_timeout > SMB3_MAX_HANDLE_TIMEOUT) {
1106 cifs_errorf(fc, "Invalid handle cache timeout, longer than 16 minutes\n");
1107 goto cifs_parse_mount_err;
1113 switch (smb3_parse_devname(param->string, ctx)) {
1117 cifs_errorf(fc, "Unable to allocate memory for devname\n");
1118 goto cifs_parse_mount_err;
1120 cifs_errorf(fc, "Malformed UNC in devname\n");
1121 goto cifs_parse_mount_err;
1123 cifs_errorf(fc, "Unknown error parsing devname\n");
1124 goto cifs_parse_mount_err;
1126 ctx->source = kstrdup(param->string, GFP_KERNEL);
1127 if (ctx->source == NULL) {
1128 cifs_errorf(fc, "OOM when copying UNC string\n");
1129 goto cifs_parse_mount_err;
1131 fc->source = kstrdup(param->string, GFP_KERNEL);
1132 if (fc->source == NULL) {
1133 cifs_errorf(fc, "OOM when copying UNC string\n");
1134 goto cifs_parse_mount_err;
1138 kfree(ctx->username);
1139 ctx->username = NULL;
1140 if (strlen(param->string) == 0) {
1141 /* null user, ie. anonymous authentication */
1146 if (strnlen(param->string, CIFS_MAX_USERNAME_LEN) >
1147 CIFS_MAX_USERNAME_LEN) {
1148 pr_warn("username too long\n");
1149 goto cifs_parse_mount_err;
1151 ctx->username = kstrdup(param->string, GFP_KERNEL);
1152 if (ctx->username == NULL) {
1153 cifs_errorf(fc, "OOM when copying username string\n");
1154 goto cifs_parse_mount_err;
1158 kfree(ctx->password);
1159 ctx->password = NULL;
1160 if (strlen(param->string) == 0)
1163 ctx->password = kstrdup(param->string, GFP_KERNEL);
1164 if (ctx->password == NULL) {
1165 cifs_errorf(fc, "OOM when copying password string\n");
1166 goto cifs_parse_mount_err;
1170 if (strlen(param->string) == 0) {
1171 ctx->got_ip = false;
1174 if (!cifs_convert_address((struct sockaddr *)&ctx->dstaddr,
1176 strlen(param->string))) {
1177 pr_err("bad ip= option (%s)\n", param->string);
1178 goto cifs_parse_mount_err;
1183 if (strnlen(param->string, CIFS_MAX_DOMAINNAME_LEN)
1184 == CIFS_MAX_DOMAINNAME_LEN) {
1185 pr_warn("domain name too long\n");
1186 goto cifs_parse_mount_err;
1189 kfree(ctx->domainname);
1190 ctx->domainname = kstrdup(param->string, GFP_KERNEL);
1191 if (ctx->domainname == NULL) {
1192 cifs_errorf(fc, "OOM when copying domainname string\n");
1193 goto cifs_parse_mount_err;
1195 cifs_dbg(FYI, "Domain name set\n");
1198 if (!cifs_convert_address(
1199 (struct sockaddr *)&ctx->srcaddr,
1200 param->string, strlen(param->string))) {
1201 pr_warn("Could not parse srcaddr: %s\n",
1203 goto cifs_parse_mount_err;
1207 if (strnlen(param->string, 1024) >= 65) {
1208 pr_warn("iocharset name too long\n");
1209 goto cifs_parse_mount_err;
1212 if (strncasecmp(param->string, "default", 7) != 0) {
1213 kfree(ctx->iocharset);
1214 ctx->iocharset = kstrdup(param->string, GFP_KERNEL);
1215 if (ctx->iocharset == NULL) {
1216 cifs_errorf(fc, "OOM when copying iocharset string\n");
1217 goto cifs_parse_mount_err;
1220 /* if iocharset not set then load_nls_default
1223 cifs_dbg(FYI, "iocharset set to %s\n", ctx->iocharset);
1225 case Opt_netbiosname:
1226 memset(ctx->source_rfc1001_name, 0x20,
1229 * FIXME: are there cases in which a comma can
1230 * be valid in workstation netbios name (and
1231 * need special handling)?
1233 for (i = 0; i < RFC1001_NAME_LEN; i++) {
1234 /* don't ucase netbiosname for user */
1235 if (param->string[i] == 0)
1237 ctx->source_rfc1001_name[i] = param->string[i];
1239 /* The string has 16th byte zero still from
1240 * set at top of the function
1242 if (i == RFC1001_NAME_LEN && param->string[i] != 0)
1243 pr_warn("netbiosname longer than 15 truncated\n");
1246 /* last byte, type, is 0x20 for servr type */
1247 memset(ctx->target_rfc1001_name, 0x20,
1248 RFC1001_NAME_LEN_WITH_NULL);
1250 * BB are there cases in which a comma can be valid in this
1251 * workstation netbios name (and need special handling)?
1254 /* user or mount helper must uppercase the netbios name */
1255 for (i = 0; i < 15; i++) {
1256 if (param->string[i] == 0)
1258 ctx->target_rfc1001_name[i] = param->string[i];
1261 /* The string has 16th byte zero still from set at top of function */
1262 if (i == RFC1001_NAME_LEN && param->string[i] != 0)
1263 pr_warn("server netbiosname longer than 15 truncated\n");
1266 /* version of mount userspace tools, not dialect */
1267 /* If interface changes in mount.cifs bump to new ver */
1268 if (strncasecmp(param->string, "1", 1) == 0) {
1269 if (strlen(param->string) > 1) {
1270 pr_warn("Bad mount helper ver=%s. Did you want SMB1 (CIFS) dialect and mean to type vers=1.0 instead?\n",
1272 goto cifs_parse_mount_err;
1274 /* This is the default */
1277 /* For all other value, error */
1278 pr_warn("Invalid mount helper version specified\n");
1279 goto cifs_parse_mount_err;
1281 /* protocol version (dialect) */
1282 if (cifs_parse_smb_version(fc, param->string, ctx, is_smb3) != 0)
1283 goto cifs_parse_mount_err;
1284 ctx->got_version = true;
1287 if (cifs_parse_security_flavors(fc, param->string, ctx) != 0)
1288 goto cifs_parse_mount_err;
1291 if (cifs_parse_cache_flavor(fc, param->string, ctx) != 0)
1292 goto cifs_parse_mount_err;
1295 #ifndef CONFIG_CIFS_SWN_UPCALL
1296 cifs_errorf(fc, "Witness support needs CONFIG_CIFS_SWN_UPCALL config option\n");
1297 goto cifs_parse_mount_err;
1299 ctx->witness = true;
1300 pr_warn_once("Witness protocol support is experimental\n");
1303 #ifndef CONFIG_CIFS_ROOT
1304 cifs_dbg(VFS, "rootfs support requires CONFIG_CIFS_ROOT config option\n");
1305 goto cifs_parse_mount_err;
1309 case Opt_posixpaths:
1311 ctx->posix_paths = 0;
1313 ctx->posix_paths = 1;
1316 if (result.negated) {
1317 if (ctx->linux_ext == 1)
1318 pr_warn_once("conflicting posix mount options specified\n");
1320 ctx->no_linux_ext = 1;
1322 if (ctx->no_linux_ext == 1)
1323 pr_warn_once("conflicting posix mount options specified\n");
1325 ctx->no_linux_ext = 0;
1332 if (result.negated) {
1334 * turn off mandatory locking in mode
1335 * if remote locking is turned off since the
1336 * local vfs will do advisory
1338 if (ctx->file_mode ==
1339 (S_IALLUGO & ~(S_ISUID | S_IXGRP)))
1340 ctx->file_mode = S_IALLUGO;
1345 case Opt_handlecache:
1347 ctx->nohandlecache = 1;
1349 ctx->nohandlecache = 0;
1351 case Opt_forcemandatorylock:
1355 ctx->setuids = result.negated;
1358 ctx->intr = !result.negated;
1360 case Opt_setuidfromacl:
1361 ctx->setuidfromacl = 1;
1363 case Opt_strictsync:
1364 ctx->nostrictsync = result.negated;
1367 ctx->server_ino = !result.negated;
1369 case Opt_rwpidforward:
1370 ctx->rwpidforward = 1;
1376 ctx->cifs_acl = !result.negated;
1379 ctx->no_psx_acl = result.negated;
1381 case Opt_locallease:
1382 ctx->local_lease = 1;
1387 case Opt_ignore_signature:
1389 ctx->ignore_signature = true;
1392 /* we do not do the following in secFlags because seal
1393 * is a per tree connection (mount) not a per socket
1394 * or per-smb connection option in the protocol
1395 * vol->secFlg |= CIFSSEC_MUST_SEAL;
1400 pr_warn("Mount option noac not supported. Instead set /proc/fs/cifs/LookupCacheEnabled to 0\n");
1403 #ifndef CONFIG_CIFS_FSCACHE
1404 cifs_errorf(fc, "FS-Cache support needs CONFIG_CIFS_FSCACHE kernel config option set\n");
1405 goto cifs_parse_mount_err;
1409 case Opt_mfsymlinks:
1410 ctx->mfsymlinks = true;
1413 ctx->multiuser = true;
1418 case Opt_nosharesock:
1419 ctx->nosharesock = true;
1421 case Opt_persistent:
1422 if (result.negated) {
1423 ctx->nopersistent = true;
1424 if (ctx->persistent) {
1425 cifs_errorf(fc, "persistenthandles mount options conflict\n");
1426 goto cifs_parse_mount_err;
1429 ctx->persistent = true;
1430 if ((ctx->nopersistent) || (ctx->resilient)) {
1431 cifs_errorf(fc, "persistenthandles mount options conflict\n");
1432 goto cifs_parse_mount_err;
1437 if (result.negated) {
1438 ctx->resilient = false; /* already the default */
1440 ctx->resilient = true;
1441 if (ctx->persistent) {
1442 cifs_errorf(fc, "persistenthandles mount options conflict\n");
1443 goto cifs_parse_mount_err;
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)
1464 struct smb3_fs_context *ctx;
1465 char *nodename = utsname()->nodename;
1468 ctx = kzalloc(sizeof(struct smb3_fs_context), GFP_KERNEL);
1473 * does not have to be perfect mapping since field is
1474 * informational, only used for servers that do not support
1475 * port 445 and it can be overridden at mount time
1477 memset(ctx->source_rfc1001_name, 0x20, RFC1001_NAME_LEN);
1478 for (i = 0; i < strnlen(nodename, RFC1001_NAME_LEN); i++)
1479 ctx->source_rfc1001_name[i] = toupper(nodename[i]);
1481 ctx->source_rfc1001_name[RFC1001_NAME_LEN] = 0;
1483 * null target name indicates to use *SMBSERVR default called name
1484 * if we end up sending RFC1001 session initialize
1486 ctx->target_rfc1001_name[0] = 0;
1487 ctx->cred_uid = current_uid();
1488 ctx->linux_uid = current_uid();
1489 ctx->linux_gid = current_gid();
1490 /* By default 4MB read ahead size, 1MB block size */
1491 ctx->bsize = CIFS_DEFAULT_IOSIZE; /* can improve cp performance significantly */
1492 ctx->rasize = 0; /* 0 = use default (ie negotiated rsize) for read ahead pages */
1495 * default to SFM style remapping of seven reserved characters
1496 * unless user overrides it or we negotiate CIFS POSIX where
1497 * it is unnecessary. Can not simultaneously use more than one mapping
1498 * since then readdir could list files that open could not open
1502 /* default to only allowing write access to owner of the mount */
1503 ctx->dir_mode = ctx->file_mode = S_IRUGO | S_IXUGO | S_IWUSR;
1505 /* ctx->retry default is 0 (i.e. "soft" limited retry not hard retry) */
1506 /* default is always to request posix paths. */
1507 ctx->posix_paths = 1;
1508 /* default to using server inode numbers where available */
1509 ctx->server_ino = 1;
1511 /* default is to use strict cifs caching semantics */
1512 ctx->strict_io = true;
1514 ctx->acregmax = CIFS_DEF_ACTIMEO;
1515 ctx->acdirmax = CIFS_DEF_ACTIMEO;
1516 ctx->closetimeo = SMB3_DEF_DCLOSETIMEO;
1518 /* Most clients set timeout to 0, allows server to use its default */
1519 ctx->handle_timeout = 0; /* See MS-SMB2 spec section 2.2.14.2.12 */
1521 /* offer SMB2.1 and later (SMB3 etc). Secure and widely accepted */
1522 ctx->ops = &smb30_operations;
1523 ctx->vals = &smbdefault_values;
1525 ctx->echo_interval = SMB_ECHO_INTERVAL_DEFAULT;
1527 /* default to no multichannel (single server connection) */
1528 ctx->multichannel = false;
1529 ctx->max_channels = 1;
1531 ctx->backupuid_specified = false; /* no backup intent for a user */
1532 ctx->backupgid_specified = false; /* no backup intent for a group */
1535 * short int override_uid = -1;
1536 * short int override_gid = -1;
1537 * char *nodename = strdup(utsname()->nodename);
1538 * struct sockaddr *dstaddr = (struct sockaddr *)&vol->dstaddr;
1541 fc->fs_private = ctx;
1542 fc->ops = &smb3_fs_context_ops;
1547 smb3_cleanup_fs_context_contents(struct smb3_fs_context *ctx)
1553 * Make sure this stays in sync with smb3_fs_context_dup()
1555 kfree(ctx->mount_options);
1556 ctx->mount_options = NULL;
1557 kfree(ctx->username);
1558 ctx->username = NULL;
1559 kfree_sensitive(ctx->password);
1560 ctx->password = NULL;
1561 kfree(ctx->server_hostname);
1562 ctx->server_hostname = NULL;
1567 kfree(ctx->domainname);
1568 ctx->domainname = NULL;
1569 kfree(ctx->nodename);
1570 ctx->nodename = NULL;
1571 kfree(ctx->iocharset);
1572 ctx->iocharset = NULL;
1573 kfree(ctx->prepath);
1574 ctx->prepath = NULL;
1578 smb3_cleanup_fs_context(struct smb3_fs_context *ctx)
1582 smb3_cleanup_fs_context_contents(ctx);
1586 void smb3_update_mnt_flags(struct cifs_sb_info *cifs_sb)
1588 struct smb3_fs_context *ctx = cifs_sb->ctx;
1591 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_DFS;
1593 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_NO_DFS;
1596 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM;
1598 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_NO_PERM;
1601 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID;
1603 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SET_UID;
1605 if (ctx->setuidfromacl)
1606 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UID_FROM_ACL;
1608 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_UID_FROM_ACL;
1610 if (ctx->server_ino)
1611 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM;
1613 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SERVER_INUM;
1616 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SFM_CHR;
1618 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_MAP_SFM_CHR;
1621 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR;
1623 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_MAP_SPECIAL_CHR;
1626 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR;
1628 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_NO_XATTR;
1631 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL;
1633 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_UNX_EMUL;
1636 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL;
1638 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_NO_BRL;
1640 if (ctx->nohandlecache)
1641 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_HANDLE_CACHE;
1643 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_NO_HANDLE_CACHE;
1645 if (ctx->nostrictsync)
1646 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOSSYNC;
1648 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_NOSSYNC;
1651 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOPOSIXBRL;
1653 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_NOPOSIXBRL;
1655 if (ctx->rwpidforward)
1656 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_RWPIDFORWARD;
1658 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_RWPIDFORWARD;
1661 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MODE_FROM_SID;
1663 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_MODE_FROM_SID;
1666 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL;
1668 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_CIFS_ACL;
1670 if (ctx->backupuid_specified)
1671 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPUID;
1673 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_CIFS_BACKUPUID;
1675 if (ctx->backupgid_specified)
1676 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPGID;
1678 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_CIFS_BACKUPGID;
1680 if (ctx->override_uid)
1681 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID;
1683 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_OVERR_UID;
1685 if (ctx->override_gid)
1686 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID;
1688 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_OVERR_GID;
1691 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM;
1693 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_DYNPERM;
1696 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_FSCACHE;
1698 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_FSCACHE;
1701 cifs_sb->mnt_cifs_flags |= (CIFS_MOUNT_MULTIUSER |
1702 CIFS_MOUNT_NO_PERM);
1704 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_MULTIUSER;
1708 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_STRICT_IO;
1710 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_STRICT_IO;
1713 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO;
1715 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_DIRECT_IO;
1717 if (ctx->mfsymlinks)
1718 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MF_SYMLINKS;
1720 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_MF_SYMLINKS;
1721 if (ctx->mfsymlinks) {
1722 if (ctx->sfu_emul) {
1724 * Our SFU ("Services for Unix" emulation does not allow
1725 * creating symlinks but does allow reading existing SFU
1726 * symlinks (it does allow both creating and reading SFU
1727 * style mknod and FIFOs though). When "mfsymlinks" and
1728 * "sfu" are both enabled at the same time, it allows
1729 * reading both types of symlinks, but will only create
1730 * them with mfsymlinks format. This allows better
1731 * Apple compatibility (probably better for Samba too)
1732 * while still recognizing old Windows style symlinks.
1734 cifs_dbg(VFS, "mount options mfsymlinks and sfu both enabled\n");
1737 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SHUTDOWN;