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 DEFINE_MUTEX(cifs_mount_mutex);
42 static const match_table_t cifs_smb_version_tokens = {
43 { Smb_1, SMB1_VERSION_STRING },
44 { Smb_20, SMB20_VERSION_STRING},
45 { Smb_21, SMB21_VERSION_STRING },
46 { Smb_30, SMB30_VERSION_STRING },
47 { Smb_302, SMB302_VERSION_STRING },
48 { Smb_302, ALT_SMB302_VERSION_STRING },
49 { Smb_311, SMB311_VERSION_STRING },
50 { Smb_311, ALT_SMB311_VERSION_STRING },
51 { Smb_3any, SMB3ANY_VERSION_STRING },
52 { Smb_default, SMBDEFAULT_VERSION_STRING },
53 { Smb_version_err, NULL }
56 static const match_table_t cifs_secflavor_tokens = {
57 { Opt_sec_krb5, "krb5" },
58 { Opt_sec_krb5i, "krb5i" },
59 { Opt_sec_krb5p, "krb5p" },
60 { Opt_sec_ntlmsspi, "ntlmsspi" },
61 { Opt_sec_ntlmssp, "ntlmssp" },
62 { Opt_sec_ntlmv2, "nontlm" },
63 { Opt_sec_ntlmv2, "ntlmv2" },
64 { Opt_sec_ntlmv2i, "ntlmv2i" },
65 { Opt_sec_none, "none" },
70 const struct fs_parameter_spec smb3_fs_parameters[] = {
71 /* Mount options that take no arguments */
72 fsparam_flag_no("user_xattr", Opt_user_xattr),
73 fsparam_flag_no("forceuid", Opt_forceuid),
74 fsparam_flag_no("multichannel", Opt_multichannel),
75 fsparam_flag_no("forcegid", Opt_forcegid),
76 fsparam_flag("noblocksend", Opt_noblocksend),
77 fsparam_flag("noautotune", Opt_noautotune),
78 fsparam_flag("nolease", Opt_nolease),
79 fsparam_flag_no("hard", Opt_hard),
80 fsparam_flag_no("soft", Opt_soft),
81 fsparam_flag_no("perm", Opt_perm),
82 fsparam_flag("nodelete", Opt_nodelete),
83 fsparam_flag_no("mapposix", Opt_mapposix),
84 fsparam_flag("mapchars", Opt_mapchars),
85 fsparam_flag("nomapchars", Opt_nomapchars),
86 fsparam_flag_no("sfu", Opt_sfu),
87 fsparam_flag("nodfs", Opt_nodfs),
88 fsparam_flag_no("posixpaths", Opt_posixpaths),
89 fsparam_flag_no("unix", Opt_unix),
90 fsparam_flag_no("linux", Opt_unix),
91 fsparam_flag_no("posix", Opt_unix),
92 fsparam_flag("nocase", Opt_nocase),
93 fsparam_flag("ignorecase", Opt_nocase),
94 fsparam_flag_no("brl", Opt_brl),
95 fsparam_flag_no("handlecache", Opt_handlecache),
96 fsparam_flag("forcemandatorylock", Opt_forcemandatorylock),
97 fsparam_flag("forcemand", Opt_forcemandatorylock),
98 fsparam_flag("setuidfromacl", Opt_setuidfromacl),
99 fsparam_flag("idsfromsid", Opt_setuidfromacl),
100 fsparam_flag_no("setuids", Opt_setuids),
101 fsparam_flag_no("dynperm", Opt_dynperm),
102 fsparam_flag_no("intr", Opt_intr),
103 fsparam_flag_no("strictsync", Opt_strictsync),
104 fsparam_flag_no("serverino", Opt_serverino),
105 fsparam_flag("rwpidforward", Opt_rwpidforward),
106 fsparam_flag("cifsacl", Opt_cifsacl),
107 fsparam_flag_no("acl", Opt_acl),
108 fsparam_flag("locallease", Opt_locallease),
109 fsparam_flag("sign", Opt_sign),
110 fsparam_flag("ignore_signature", Opt_ignore_signature),
111 fsparam_flag("signloosely", Opt_ignore_signature),
112 fsparam_flag("seal", Opt_seal),
113 fsparam_flag("noac", Opt_noac),
114 fsparam_flag("fsc", Opt_fsc),
115 fsparam_flag("mfsymlinks", Opt_mfsymlinks),
116 fsparam_flag("multiuser", Opt_multiuser),
117 fsparam_flag("sloppy", Opt_sloppy),
118 fsparam_flag("nosharesock", Opt_nosharesock),
119 fsparam_flag_no("persistenthandles", Opt_persistent),
120 fsparam_flag_no("resilienthandles", Opt_resilient),
121 fsparam_flag_no("tcpnodelay", Opt_tcp_nodelay),
122 fsparam_flag("nosparse", Opt_nosparse),
123 fsparam_flag("domainauto", Opt_domainauto),
124 fsparam_flag("rdma", Opt_rdma),
125 fsparam_flag("modesid", Opt_modesid),
126 fsparam_flag("modefromsid", Opt_modesid),
127 fsparam_flag("rootfs", Opt_rootfs),
128 fsparam_flag("compress", Opt_compress),
129 fsparam_flag("witness", Opt_witness),
131 /* Mount options which take numeric value */
132 fsparam_u32("backupuid", Opt_backupuid),
133 fsparam_u32("backupgid", Opt_backupgid),
134 fsparam_u32("uid", Opt_uid),
135 fsparam_u32("cruid", Opt_cruid),
136 fsparam_u32("gid", Opt_gid),
137 fsparam_u32("file_mode", Opt_file_mode),
138 fsparam_u32("dirmode", Opt_dirmode),
139 fsparam_u32("dir_mode", Opt_dirmode),
140 fsparam_u32("port", Opt_port),
141 fsparam_u32("min_enc_offload", Opt_min_enc_offload),
142 fsparam_u32("esize", Opt_min_enc_offload),
143 fsparam_u32("bsize", Opt_blocksize),
144 fsparam_u32("rasize", Opt_rasize),
145 fsparam_u32("rsize", Opt_rsize),
146 fsparam_u32("wsize", Opt_wsize),
147 fsparam_u32("actimeo", Opt_actimeo),
148 fsparam_u32("acdirmax", Opt_acdirmax),
149 fsparam_u32("acregmax", Opt_acregmax),
150 fsparam_u32("echo_interval", Opt_echo_interval),
151 fsparam_u32("max_credits", Opt_max_credits),
152 fsparam_u32("handletimeout", Opt_handletimeout),
153 fsparam_u64("snapshot", Opt_snapshot),
154 fsparam_u32("max_channels", Opt_max_channels),
156 /* Mount options which take string value */
157 fsparam_string("source", Opt_source),
158 fsparam_string("user", Opt_user),
159 fsparam_string("username", Opt_user),
160 fsparam_string("pass", Opt_pass),
161 fsparam_string("password", Opt_pass),
162 fsparam_string("ip", Opt_ip),
163 fsparam_string("addr", Opt_ip),
164 fsparam_string("domain", Opt_domain),
165 fsparam_string("dom", Opt_domain),
166 fsparam_string("srcaddr", Opt_srcaddr),
167 fsparam_string("iocharset", Opt_iocharset),
168 fsparam_string("netbiosname", Opt_netbiosname),
169 fsparam_string("servern", Opt_servern),
170 fsparam_string("ver", Opt_ver),
171 fsparam_string("vers", Opt_vers),
172 fsparam_string("sec", Opt_sec),
173 fsparam_string("cache", Opt_cache),
175 /* Arguments that should be ignored */
176 fsparam_flag("guest", Opt_ignore),
177 fsparam_flag("noatime", Opt_ignore),
178 fsparam_flag("relatime", Opt_ignore),
179 fsparam_flag("_netdev", Opt_ignore),
180 fsparam_flag_no("suid", Opt_ignore),
181 fsparam_flag_no("exec", Opt_ignore),
182 fsparam_flag_no("dev", Opt_ignore),
183 fsparam_flag_no("mand", Opt_ignore),
184 fsparam_flag_no("auto", Opt_ignore),
185 fsparam_string("cred", Opt_ignore),
186 fsparam_string("credentials", Opt_ignore),
188 * UNC and prefixpath is now extracted from Opt_source
189 * in the new mount API so we can just ignore them going forward.
191 fsparam_string("unc", Opt_ignore),
192 fsparam_string("prefixpath", Opt_ignore),
197 cifs_parse_security_flavors(struct fs_context *fc, char *value, struct smb3_fs_context *ctx)
200 substring_t args[MAX_OPT_ARGS];
203 * With mount options, the last one should win. Reset any existing
204 * settings back to default.
206 ctx->sectype = Unspecified;
209 switch (match_token(value, cifs_secflavor_tokens, args)) {
211 cifs_errorf(fc, "sec=krb5p is not supported!\n");
217 ctx->sectype = Kerberos;
219 case Opt_sec_ntlmsspi:
222 case Opt_sec_ntlmssp:
223 ctx->sectype = RawNTLMSSP;
225 case Opt_sec_ntlmv2i:
229 ctx->sectype = NTLMv2;
235 cifs_errorf(fc, "bad security option: %s\n", value);
242 static const match_table_t cifs_cacheflavor_tokens = {
243 { Opt_cache_loose, "loose" },
244 { Opt_cache_strict, "strict" },
245 { Opt_cache_none, "none" },
246 { Opt_cache_ro, "ro" },
247 { Opt_cache_rw, "singleclient" },
248 { Opt_cache_err, NULL }
252 cifs_parse_cache_flavor(struct fs_context *fc, char *value, struct smb3_fs_context *ctx)
254 substring_t args[MAX_OPT_ARGS];
256 switch (match_token(value, cifs_cacheflavor_tokens, args)) {
257 case Opt_cache_loose:
258 ctx->direct_io = false;
259 ctx->strict_io = false;
260 ctx->cache_ro = false;
261 ctx->cache_rw = false;
263 case Opt_cache_strict:
264 ctx->direct_io = false;
265 ctx->strict_io = true;
266 ctx->cache_ro = false;
267 ctx->cache_rw = false;
270 ctx->direct_io = true;
271 ctx->strict_io = false;
272 ctx->cache_ro = false;
273 ctx->cache_rw = false;
276 ctx->direct_io = false;
277 ctx->strict_io = false;
278 ctx->cache_ro = true;
279 ctx->cache_rw = false;
282 ctx->direct_io = false;
283 ctx->strict_io = false;
284 ctx->cache_ro = false;
285 ctx->cache_rw = true;
288 cifs_errorf(fc, "bad cache= option: %s\n", value);
294 #define DUP_CTX_STR(field) \
297 new_ctx->field = kstrdup(ctx->field, GFP_ATOMIC); \
298 if (new_ctx->field == NULL) { \
299 smb3_cleanup_fs_context_contents(new_ctx); \
306 smb3_fs_context_dup(struct smb3_fs_context *new_ctx, struct smb3_fs_context *ctx)
308 memcpy(new_ctx, ctx, sizeof(*ctx));
309 new_ctx->prepath = NULL;
310 new_ctx->mount_options = NULL;
311 new_ctx->nodename = NULL;
312 new_ctx->username = NULL;
313 new_ctx->password = NULL;
314 new_ctx->server_hostname = NULL;
315 new_ctx->domainname = NULL;
317 new_ctx->source = NULL;
318 new_ctx->iocharset = NULL;
320 * Make sure to stay in sync with smb3_cleanup_fs_context_contents()
322 DUP_CTX_STR(prepath);
323 DUP_CTX_STR(mount_options);
324 DUP_CTX_STR(username);
325 DUP_CTX_STR(password);
326 DUP_CTX_STR(server_hostname);
329 DUP_CTX_STR(domainname);
330 DUP_CTX_STR(nodename);
331 DUP_CTX_STR(iocharset);
337 cifs_parse_smb_version(struct fs_context *fc, char *value, struct smb3_fs_context *ctx, bool is_smb3)
339 substring_t args[MAX_OPT_ARGS];
341 switch (match_token(value, cifs_smb_version_tokens, args)) {
342 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
344 if (disable_legacy_dialects) {
345 cifs_errorf(fc, "mount with legacy dialect disabled\n");
349 cifs_errorf(fc, "vers=1.0 (cifs) not permitted when mounting with smb3\n");
352 cifs_errorf(fc, "Use of the less secure dialect vers=1.0 is not recommended unless required for access to very old servers\n");
353 ctx->ops = &smb1_operations;
354 ctx->vals = &smb1_values;
357 if (disable_legacy_dialects) {
358 cifs_errorf(fc, "mount with legacy dialect disabled\n");
362 cifs_errorf(fc, "vers=2.0 not permitted when mounting with smb3\n");
365 ctx->ops = &smb20_operations;
366 ctx->vals = &smb20_values;
370 cifs_errorf(fc, "vers=1.0 (cifs) mount not permitted when legacy dialects disabled\n");
373 cifs_errorf(fc, "vers=2.0 mount not permitted when legacy dialects disabled\n");
375 #endif /* CIFS_ALLOW_INSECURE_LEGACY */
377 ctx->ops = &smb21_operations;
378 ctx->vals = &smb21_values;
381 ctx->ops = &smb30_operations;
382 ctx->vals = &smb30_values;
385 ctx->ops = &smb30_operations; /* currently identical with 3.0 */
386 ctx->vals = &smb302_values;
389 ctx->ops = &smb311_operations;
390 ctx->vals = &smb311_values;
393 ctx->ops = &smb30_operations; /* currently identical with 3.0 */
394 ctx->vals = &smb3any_values;
397 ctx->ops = &smb30_operations;
398 ctx->vals = &smbdefault_values;
401 cifs_errorf(fc, "Unknown vers= option specified: %s\n", value);
407 int smb3_parse_opt(const char *options, const char *key, char **val)
410 char *opts, *orig, *p;
412 orig = opts = kstrdup(options, GFP_KERNEL);
416 while ((p = strsep(&opts, ","))) {
421 if (strncasecmp(p, key, strlen(key)))
423 nval = strchr(p, '=');
428 *val = kstrdup(nval, GFP_KERNEL);
429 rc = !*val ? -ENOMEM : 0;
439 * Remove duplicate path delimiters. Windows is supposed to do that
440 * but there are some bugs that prevent rename from working if there are
441 * multiple delimiters.
443 * Returns a sanitized duplicate of @path. The caller is responsible for
444 * cleaning up the original.
446 #define IS_DELIM(c) ((c) == '/' || (c) == '\\')
447 static char *sanitize_path(char *path)
449 char *cursor1 = path, *cursor2 = path;
451 /* skip all prepended delimiters */
452 while (IS_DELIM(*cursor1))
455 /* copy the first letter */
458 /* copy the remainder... */
459 while (*(cursor1++)) {
460 /* ... skipping all duplicated delimiters */
461 if (IS_DELIM(*cursor1) && IS_DELIM(*cursor2))
463 *(++cursor2) = *cursor1;
466 /* if the last character is a delimiter, skip it */
467 if (IS_DELIM(*(cursor2 - 1)))
471 return kstrdup(path, GFP_KERNEL);
475 * Parse a devname into substrings and populate the ctx->UNC and ctx->prepath
476 * fields with the result. Returns 0 on success and an error otherwise
477 * (e.g. ENOMEM or EINVAL)
480 smb3_parse_devname(const char *devname, struct smb3_fs_context *ctx)
483 const char *delims = "/\\";
486 if (unlikely(!devname || !*devname)) {
487 cifs_dbg(VFS, "Device name not specified\n");
491 /* make sure we have a valid UNC double delimiter prefix */
492 len = strspn(devname, delims);
496 /* find delimiter between host and sharename */
497 pos = strpbrk(devname + 2, delims);
501 /* record the server hostname */
502 kfree(ctx->server_hostname);
503 ctx->server_hostname = kstrndup(devname + 2, pos - devname - 2, GFP_KERNEL);
504 if (!ctx->server_hostname)
507 /* skip past delimiter */
510 /* now go until next delimiter or end of string */
511 len = strcspn(pos, delims);
513 /* move "pos" up to delimiter or NULL */
516 ctx->UNC = kstrndup(devname, pos - devname, GFP_KERNEL);
520 convert_delimiter(ctx->UNC, '\\');
522 /* skip any delimiter */
523 if (*pos == '/' || *pos == '\\')
529 /* If pos is NULL then no prepath */
533 ctx->prepath = sanitize_path(pos);
540 static void smb3_fs_context_free(struct fs_context *fc);
541 static int smb3_fs_context_parse_param(struct fs_context *fc,
542 struct fs_parameter *param);
543 static int smb3_fs_context_parse_monolithic(struct fs_context *fc,
545 static int smb3_get_tree(struct fs_context *fc);
546 static int smb3_reconfigure(struct fs_context *fc);
548 static const struct fs_context_operations smb3_fs_context_ops = {
549 .free = smb3_fs_context_free,
550 .parse_param = smb3_fs_context_parse_param,
551 .parse_monolithic = smb3_fs_context_parse_monolithic,
552 .get_tree = smb3_get_tree,
553 .reconfigure = smb3_reconfigure,
557 * Parse a monolithic block of data from sys_mount().
558 * smb3_fs_context_parse_monolithic - Parse key[=val][,key[=val]]* mount data
559 * @ctx: The superblock configuration to fill in.
560 * @data: The data to parse
562 * Parse a blob of data that's in key[=val][,key[=val]]* form. This can be
563 * called from the ->monolithic_mount_data() fs_context operation.
565 * Returns 0 on success or the error returned by the ->parse_option() fs_context
566 * operation on failure.
568 static int smb3_fs_context_parse_monolithic(struct fs_context *fc,
571 struct smb3_fs_context *ctx = smb3_fc2context(fc);
572 char *options = data, *key;
578 ctx->mount_options = kstrdup(data, GFP_KERNEL);
579 if (ctx->mount_options == NULL)
582 ret = security_sb_eat_lsm_opts(options, &fc->security);
586 /* BB Need to add support for sep= here TBD */
587 while ((key = strsep(&options, ",")) != NULL) {
594 /* Check if following character is the deliminator If yes,
595 * we have encountered a double deliminator reset the NULL
596 * character to the deliminator
598 while (options && options[0] == ',') {
600 strcpy(key + len, options);
601 options = strchr(options, ',');
608 value = strchr(key, '=');
616 ret = vfs_parse_fs_string(fc, key, value, len);
625 * Validate the preparsed information in the config.
627 static int smb3_fs_context_validate(struct fs_context *fc)
629 struct smb3_fs_context *ctx = smb3_fc2context(fc);
631 if (ctx->rdma && ctx->vals->protocol_id < SMB30_PROT_ID) {
632 cifs_errorf(fc, "SMB Direct requires Version >=3.0\n");
637 /* Muliuser mounts require CONFIG_KEYS support */
638 if (ctx->multiuser) {
639 cifs_errorf(fc, "Multiuser mounts require kernels with CONFIG_KEYS enabled\n");
644 if (ctx->got_version == false)
645 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");
649 cifs_errorf(fc, "CIFS mount error: No usable UNC path provided in device string!\n");
653 /* make sure UNC has a share name */
654 if (strlen(ctx->UNC) < 3 || !strchr(ctx->UNC + 3, '\\')) {
655 cifs_errorf(fc, "Malformed UNC. Unable to find share name.\n");
663 /* No ip= option specified? Try to get it from UNC */
664 /* Use the address part of the UNC. */
665 slash = strchr(&ctx->UNC[2], '\\');
666 len = slash - &ctx->UNC[2];
667 if (!cifs_convert_address((struct sockaddr *)&ctx->dstaddr,
668 &ctx->UNC[2], len)) {
669 pr_err("Unable to determine destination address\n");
670 return -EHOSTUNREACH;
674 /* set the port that we got earlier */
675 cifs_set_port((struct sockaddr *)&ctx->dstaddr, ctx->port);
677 if (ctx->override_uid && !ctx->uid_specified) {
678 ctx->override_uid = 0;
679 pr_notice("ignoring forceuid mount option specified with no uid= option\n");
682 if (ctx->override_gid && !ctx->gid_specified) {
683 ctx->override_gid = 0;
684 pr_notice("ignoring forcegid mount option specified with no gid= option\n");
690 static int smb3_get_tree_common(struct fs_context *fc)
692 struct smb3_fs_context *ctx = smb3_fc2context(fc);
696 root = cifs_smb3_do_mount(fc->fs_type, 0, ctx);
698 return PTR_ERR(root);
706 * Create an SMB3 superblock from the parameters passed.
708 static int smb3_get_tree(struct fs_context *fc)
710 int err = smb3_fs_context_validate(fc);
715 mutex_lock(&cifs_mount_mutex);
716 ret = smb3_get_tree_common(fc);
717 mutex_unlock(&cifs_mount_mutex);
721 static void smb3_fs_context_free(struct fs_context *fc)
723 struct smb3_fs_context *ctx = smb3_fc2context(fc);
725 smb3_cleanup_fs_context(ctx);
729 * Compare the old and new proposed context during reconfigure
730 * and check if the changes are compatible.
732 static int smb3_verify_reconfigure_ctx(struct fs_context *fc,
733 struct smb3_fs_context *new_ctx,
734 struct smb3_fs_context *old_ctx)
736 if (new_ctx->posix_paths != old_ctx->posix_paths) {
737 cifs_errorf(fc, "can not change posixpaths during remount\n");
740 if (new_ctx->sectype != old_ctx->sectype) {
741 cifs_errorf(fc, "can not change sec during remount\n");
744 if (new_ctx->multiuser != old_ctx->multiuser) {
745 cifs_errorf(fc, "can not change multiuser during remount\n");
749 (!old_ctx->UNC || strcmp(new_ctx->UNC, old_ctx->UNC))) {
750 cifs_errorf(fc, "can not change UNC during remount\n");
753 if (new_ctx->username &&
754 (!old_ctx->username || strcmp(new_ctx->username, old_ctx->username))) {
755 cifs_errorf(fc, "can not change username during remount\n");
758 if (new_ctx->password &&
759 (!old_ctx->password || strcmp(new_ctx->password, old_ctx->password))) {
760 cifs_errorf(fc, "can not change password during remount\n");
763 if (new_ctx->domainname &&
764 (!old_ctx->domainname || strcmp(new_ctx->domainname, old_ctx->domainname))) {
765 cifs_errorf(fc, "can not change domainname during remount\n");
768 if (strcmp(new_ctx->workstation_name, old_ctx->workstation_name)) {
769 cifs_errorf(fc, "can not change workstation_name during remount\n");
772 if (new_ctx->nodename &&
773 (!old_ctx->nodename || strcmp(new_ctx->nodename, old_ctx->nodename))) {
774 cifs_errorf(fc, "can not change nodename during remount\n");
777 if (new_ctx->iocharset &&
778 (!old_ctx->iocharset || strcmp(new_ctx->iocharset, old_ctx->iocharset))) {
779 cifs_errorf(fc, "can not change iocharset during remount\n");
786 #define STEAL_STRING(cifs_sb, ctx, field) \
789 ctx->field = cifs_sb->ctx->field; \
790 cifs_sb->ctx->field = NULL; \
793 static int smb3_reconfigure(struct fs_context *fc)
795 struct smb3_fs_context *ctx = smb3_fc2context(fc);
796 struct dentry *root = fc->root;
797 struct cifs_sb_info *cifs_sb = CIFS_SB(root->d_sb);
800 rc = smb3_verify_reconfigure_ctx(fc, ctx, cifs_sb->ctx);
805 * We can not change UNC/username/password/domainname/
806 * workstation_name/nodename/iocharset
807 * during reconnect so ignore what we have in the new context and
808 * just use what we already have in cifs_sb->ctx.
810 STEAL_STRING(cifs_sb, ctx, UNC);
811 STEAL_STRING(cifs_sb, ctx, source);
812 STEAL_STRING(cifs_sb, ctx, username);
813 STEAL_STRING(cifs_sb, ctx, password);
814 STEAL_STRING(cifs_sb, ctx, domainname);
815 STEAL_STRING(cifs_sb, ctx, nodename);
816 STEAL_STRING(cifs_sb, ctx, iocharset);
818 /* if rsize or wsize not passed in on remount, use previous values */
820 ctx->rsize = cifs_sb->ctx->rsize;
822 ctx->wsize = cifs_sb->ctx->wsize;
825 smb3_cleanup_fs_context_contents(cifs_sb->ctx);
826 rc = smb3_fs_context_dup(cifs_sb->ctx, ctx);
827 smb3_update_mnt_flags(cifs_sb);
828 #ifdef CONFIG_CIFS_DFS_UPCALL
830 rc = dfs_cache_remount_fs(cifs_sb);
836 static int smb3_fs_context_parse_param(struct fs_context *fc,
837 struct fs_parameter *param)
839 struct fs_parse_result result;
840 struct smb3_fs_context *ctx = smb3_fc2context(fc);
842 bool is_smb3 = !strcmp(fc->fs_type->name, "smb3");
843 bool skip_parsing = false;
847 cifs_dbg(FYI, "CIFS: parsing cifs mount option '%s'\n", param->key);
850 * fs_parse can not handle string options with an empty value so
851 * we will need special handling of them.
853 if (param->type == fs_value_is_string && param->string[0] == 0) {
854 if (!strcmp("pass", param->key) || !strcmp("password", param->key)) {
857 } else if (!strcmp("user", param->key) || !strcmp("username", param->key)) {
864 opt = fs_parse(fc, smb3_fs_parameters, param, &result);
866 return ctx->sloppy ? 1 : opt;
871 ctx->compression = UNKNOWN_TYPE;
873 "SMB3 compression support is experimental\n");
895 ctx->sfu_remap = false; /* disable SFU mapping */
906 ctx->override_uid = 0;
908 ctx->override_uid = 1;
912 ctx->override_gid = 0;
914 ctx->override_gid = 1;
934 case Opt_noblocksend:
949 case Opt_multichannel:
950 if (result.negated) {
951 ctx->multichannel = false;
952 ctx->max_channels = 1;
954 ctx->multichannel = true;
955 /* if number of channels not specified, default to 2 */
956 if (ctx->max_channels < 2)
957 ctx->max_channels = 2;
961 uid = make_kuid(current_user_ns(), result.uint_32);
963 goto cifs_parse_mount_err;
964 ctx->linux_uid = uid;
965 ctx->uid_specified = true;
968 uid = make_kuid(current_user_ns(), result.uint_32);
970 goto cifs_parse_mount_err;
972 ctx->cruid_specified = true;
975 uid = make_kuid(current_user_ns(), result.uint_32);
977 goto cifs_parse_mount_err;
978 ctx->backupuid = uid;
979 ctx->backupuid_specified = true;
982 gid = make_kgid(current_user_ns(), result.uint_32);
984 goto cifs_parse_mount_err;
985 ctx->backupgid = gid;
986 ctx->backupgid_specified = true;
989 gid = make_kgid(current_user_ns(), result.uint_32);
991 goto cifs_parse_mount_err;
992 ctx->linux_gid = gid;
993 ctx->gid_specified = true;
996 ctx->port = result.uint_32;
999 ctx->file_mode = result.uint_32;
1002 ctx->dir_mode = result.uint_32;
1004 case Opt_min_enc_offload:
1005 ctx->min_offload = result.uint_32;
1009 * inode blocksize realistically should never need to be
1010 * less than 16K or greater than 16M and default is 1MB.
1011 * Note that small inode block sizes (e.g. 64K) can lead
1012 * to very poor performance of common tools like cp and scp
1014 if ((result.uint_32 < CIFS_MAX_MSGSIZE) ||
1015 (result.uint_32 > (4 * SMB3_DEFAULT_IOSIZE))) {
1016 cifs_errorf(fc, "%s: Invalid blocksize\n",
1018 goto cifs_parse_mount_err;
1020 ctx->bsize = result.uint_32;
1021 ctx->got_bsize = true;
1025 * readahead size realistically should never need to be
1026 * less than 1M (CIFS_DEFAULT_IOSIZE) or greater than 32M
1027 * (perhaps an exception should be considered in the
1028 * for the case of a large number of channels
1029 * when multichannel is negotiated) since that would lead
1030 * to plenty of parallel I/O in flight to the server.
1031 * Note that smaller read ahead sizes would
1032 * hurt performance of common tools like cp and scp
1033 * which often trigger sequential i/o with read ahead
1035 if ((result.uint_32 > (8 * SMB3_DEFAULT_IOSIZE)) ||
1036 (result.uint_32 < CIFS_DEFAULT_IOSIZE)) {
1037 cifs_errorf(fc, "%s: Invalid rasize %d vs. %d\n",
1038 __func__, result.uint_32, SMB3_DEFAULT_IOSIZE);
1039 goto cifs_parse_mount_err;
1041 ctx->rasize = result.uint_32;
1044 ctx->rsize = result.uint_32;
1045 ctx->got_rsize = true;
1048 ctx->wsize = result.uint_32;
1049 ctx->got_wsize = true;
1052 ctx->acregmax = HZ * result.uint_32;
1053 if (ctx->acregmax > CIFS_MAX_ACTIMEO) {
1054 cifs_errorf(fc, "acregmax too large\n");
1055 goto cifs_parse_mount_err;
1059 ctx->acdirmax = HZ * result.uint_32;
1060 if (ctx->acdirmax > CIFS_MAX_ACTIMEO) {
1061 cifs_errorf(fc, "acdirmax too large\n");
1062 goto cifs_parse_mount_err;
1066 if (HZ * result.uint_32 > CIFS_MAX_ACTIMEO) {
1067 cifs_errorf(fc, "timeout too large\n");
1068 goto cifs_parse_mount_err;
1070 if ((ctx->acdirmax != CIFS_DEF_ACTIMEO) ||
1071 (ctx->acregmax != CIFS_DEF_ACTIMEO)) {
1072 cifs_errorf(fc, "actimeo ignored since acregmax or acdirmax specified\n");
1075 ctx->acdirmax = ctx->acregmax = HZ * result.uint_32;
1077 case Opt_echo_interval:
1078 ctx->echo_interval = result.uint_32;
1081 ctx->snapshot_time = result.uint_64;
1083 case Opt_max_credits:
1084 if (result.uint_32 < 20 || result.uint_32 > 60000) {
1085 cifs_errorf(fc, "%s: Invalid max_credits value\n",
1087 goto cifs_parse_mount_err;
1089 ctx->max_credits = result.uint_32;
1091 case Opt_max_channels:
1092 if (result.uint_32 < 1 || result.uint_32 > CIFS_MAX_CHANNELS) {
1093 cifs_errorf(fc, "%s: Invalid max_channels value, needs to be 1-%d\n",
1094 __func__, CIFS_MAX_CHANNELS);
1095 goto cifs_parse_mount_err;
1097 ctx->max_channels = result.uint_32;
1098 /* If more than one channel requested ... they want multichan */
1099 if (result.uint_32 > 1)
1100 ctx->multichannel = true;
1102 case Opt_handletimeout:
1103 ctx->handle_timeout = result.uint_32;
1104 if (ctx->handle_timeout > SMB3_MAX_HANDLE_TIMEOUT) {
1105 cifs_errorf(fc, "Invalid handle cache timeout, longer than 16 minutes\n");
1106 goto cifs_parse_mount_err;
1112 switch (smb3_parse_devname(param->string, ctx)) {
1116 cifs_errorf(fc, "Unable to allocate memory for devname\n");
1117 goto cifs_parse_mount_err;
1119 cifs_errorf(fc, "Malformed UNC in devname\n");
1120 goto cifs_parse_mount_err;
1122 cifs_errorf(fc, "Unknown error parsing devname\n");
1123 goto cifs_parse_mount_err;
1125 ctx->source = kstrdup(param->string, GFP_KERNEL);
1126 if (ctx->source == NULL) {
1127 cifs_errorf(fc, "OOM when copying UNC string\n");
1128 goto cifs_parse_mount_err;
1130 fc->source = kstrdup(param->string, GFP_KERNEL);
1131 if (fc->source == NULL) {
1132 cifs_errorf(fc, "OOM when copying UNC string\n");
1133 goto cifs_parse_mount_err;
1137 kfree(ctx->username);
1138 ctx->username = NULL;
1139 if (strlen(param->string) == 0) {
1140 /* null user, ie. anonymous authentication */
1145 if (strnlen(param->string, CIFS_MAX_USERNAME_LEN) >
1146 CIFS_MAX_USERNAME_LEN) {
1147 pr_warn("username too long\n");
1148 goto cifs_parse_mount_err;
1150 ctx->username = kstrdup(param->string, GFP_KERNEL);
1151 if (ctx->username == NULL) {
1152 cifs_errorf(fc, "OOM when copying username string\n");
1153 goto cifs_parse_mount_err;
1157 kfree(ctx->password);
1158 ctx->password = NULL;
1159 if (strlen(param->string) == 0)
1162 ctx->password = kstrdup(param->string, GFP_KERNEL);
1163 if (ctx->password == NULL) {
1164 cifs_errorf(fc, "OOM when copying password string\n");
1165 goto cifs_parse_mount_err;
1169 if (strlen(param->string) == 0) {
1170 ctx->got_ip = false;
1173 if (!cifs_convert_address((struct sockaddr *)&ctx->dstaddr,
1175 strlen(param->string))) {
1176 pr_err("bad ip= option (%s)\n", param->string);
1177 goto cifs_parse_mount_err;
1182 if (strnlen(param->string, CIFS_MAX_DOMAINNAME_LEN)
1183 == CIFS_MAX_DOMAINNAME_LEN) {
1184 pr_warn("domain name too long\n");
1185 goto cifs_parse_mount_err;
1188 kfree(ctx->domainname);
1189 ctx->domainname = kstrdup(param->string, GFP_KERNEL);
1190 if (ctx->domainname == NULL) {
1191 cifs_errorf(fc, "OOM when copying domainname string\n");
1192 goto cifs_parse_mount_err;
1194 cifs_dbg(FYI, "Domain name set\n");
1197 if (!cifs_convert_address(
1198 (struct sockaddr *)&ctx->srcaddr,
1199 param->string, strlen(param->string))) {
1200 pr_warn("Could not parse srcaddr: %s\n",
1202 goto cifs_parse_mount_err;
1206 if (strnlen(param->string, 1024) >= 65) {
1207 pr_warn("iocharset name too long\n");
1208 goto cifs_parse_mount_err;
1211 if (strncasecmp(param->string, "default", 7) != 0) {
1212 kfree(ctx->iocharset);
1213 ctx->iocharset = kstrdup(param->string, GFP_KERNEL);
1214 if (ctx->iocharset == NULL) {
1215 cifs_errorf(fc, "OOM when copying iocharset string\n");
1216 goto cifs_parse_mount_err;
1219 /* if iocharset not set then load_nls_default
1222 cifs_dbg(FYI, "iocharset set to %s\n", ctx->iocharset);
1224 case Opt_netbiosname:
1225 memset(ctx->source_rfc1001_name, 0x20,
1228 * FIXME: are there cases in which a comma can
1229 * be valid in workstation netbios name (and
1230 * need special handling)?
1232 for (i = 0; i < RFC1001_NAME_LEN; i++) {
1233 /* don't ucase netbiosname for user */
1234 if (param->string[i] == 0)
1236 ctx->source_rfc1001_name[i] = param->string[i];
1238 /* The string has 16th byte zero still from
1239 * set at top of the function
1241 if (i == RFC1001_NAME_LEN && param->string[i] != 0)
1242 pr_warn("netbiosname longer than 15 truncated\n");
1245 /* last byte, type, is 0x20 for servr type */
1246 memset(ctx->target_rfc1001_name, 0x20,
1247 RFC1001_NAME_LEN_WITH_NULL);
1249 * BB are there cases in which a comma can be valid in this
1250 * workstation netbios name (and need special handling)?
1253 /* user or mount helper must uppercase the netbios name */
1254 for (i = 0; i < 15; i++) {
1255 if (param->string[i] == 0)
1257 ctx->target_rfc1001_name[i] = param->string[i];
1260 /* The string has 16th byte zero still from set at top of function */
1261 if (i == RFC1001_NAME_LEN && param->string[i] != 0)
1262 pr_warn("server netbiosname longer than 15 truncated\n");
1265 /* version of mount userspace tools, not dialect */
1266 /* If interface changes in mount.cifs bump to new ver */
1267 if (strncasecmp(param->string, "1", 1) == 0) {
1268 if (strlen(param->string) > 1) {
1269 pr_warn("Bad mount helper ver=%s. Did you want SMB1 (CIFS) dialect and mean to type vers=1.0 instead?\n",
1271 goto cifs_parse_mount_err;
1273 /* This is the default */
1276 /* For all other value, error */
1277 pr_warn("Invalid mount helper version specified\n");
1278 goto cifs_parse_mount_err;
1280 /* protocol version (dialect) */
1281 if (cifs_parse_smb_version(fc, param->string, ctx, is_smb3) != 0)
1282 goto cifs_parse_mount_err;
1283 ctx->got_version = true;
1286 if (cifs_parse_security_flavors(fc, param->string, ctx) != 0)
1287 goto cifs_parse_mount_err;
1290 if (cifs_parse_cache_flavor(fc, param->string, ctx) != 0)
1291 goto cifs_parse_mount_err;
1294 #ifndef CONFIG_CIFS_SWN_UPCALL
1295 cifs_errorf(fc, "Witness support needs CONFIG_CIFS_SWN_UPCALL config option\n");
1296 goto cifs_parse_mount_err;
1298 ctx->witness = true;
1299 pr_warn_once("Witness protocol support is experimental\n");
1302 #ifndef CONFIG_CIFS_ROOT
1303 cifs_dbg(VFS, "rootfs support requires CONFIG_CIFS_ROOT config option\n");
1304 goto cifs_parse_mount_err;
1308 case Opt_posixpaths:
1310 ctx->posix_paths = 0;
1312 ctx->posix_paths = 1;
1315 if (result.negated) {
1316 if (ctx->linux_ext == 1)
1317 pr_warn_once("conflicting posix mount options specified\n");
1319 ctx->no_linux_ext = 1;
1321 if (ctx->no_linux_ext == 1)
1322 pr_warn_once("conflicting posix mount options specified\n");
1324 ctx->no_linux_ext = 0;
1331 if (result.negated) {
1333 * turn off mandatory locking in mode
1334 * if remote locking is turned off since the
1335 * local vfs will do advisory
1337 if (ctx->file_mode ==
1338 (S_IALLUGO & ~(S_ISUID | S_IXGRP)))
1339 ctx->file_mode = S_IALLUGO;
1344 case Opt_handlecache:
1346 ctx->nohandlecache = 1;
1348 ctx->nohandlecache = 0;
1350 case Opt_forcemandatorylock:
1354 ctx->setuids = result.negated;
1357 ctx->intr = !result.negated;
1359 case Opt_setuidfromacl:
1360 ctx->setuidfromacl = 1;
1362 case Opt_strictsync:
1363 ctx->nostrictsync = result.negated;
1366 ctx->server_ino = !result.negated;
1368 case Opt_rwpidforward:
1369 ctx->rwpidforward = 1;
1375 ctx->cifs_acl = !result.negated;
1378 ctx->no_psx_acl = result.negated;
1380 case Opt_locallease:
1381 ctx->local_lease = 1;
1386 case Opt_ignore_signature:
1388 ctx->ignore_signature = true;
1391 /* we do not do the following in secFlags because seal
1392 * is a per tree connection (mount) not a per socket
1393 * or per-smb connection option in the protocol
1394 * vol->secFlg |= CIFSSEC_MUST_SEAL;
1399 pr_warn("Mount option noac not supported. Instead set /proc/fs/cifs/LookupCacheEnabled to 0\n");
1402 #ifndef CONFIG_CIFS_FSCACHE
1403 cifs_errorf(fc, "FS-Cache support needs CONFIG_CIFS_FSCACHE kernel config option set\n");
1404 goto cifs_parse_mount_err;
1408 case Opt_mfsymlinks:
1409 ctx->mfsymlinks = true;
1412 ctx->multiuser = true;
1417 case Opt_nosharesock:
1418 ctx->nosharesock = true;
1420 case Opt_persistent:
1421 if (result.negated) {
1422 ctx->nopersistent = true;
1423 if (ctx->persistent) {
1424 cifs_errorf(fc, "persistenthandles mount options conflict\n");
1425 goto cifs_parse_mount_err;
1428 ctx->persistent = true;
1429 if ((ctx->nopersistent) || (ctx->resilient)) {
1430 cifs_errorf(fc, "persistenthandles mount options conflict\n");
1431 goto cifs_parse_mount_err;
1436 if (result.negated) {
1437 ctx->resilient = false; /* already the default */
1439 ctx->resilient = true;
1440 if (ctx->persistent) {
1441 cifs_errorf(fc, "persistenthandles mount options conflict\n");
1442 goto cifs_parse_mount_err;
1446 case Opt_tcp_nodelay:
1447 /* tcp nodelay should not usually be needed since we CORK/UNCORK the socket */
1449 ctx->sockopt_tcp_nodelay = false;
1451 ctx->sockopt_tcp_nodelay = true;
1453 case Opt_domainauto:
1454 ctx->domainauto = true;
1460 /* case Opt_ignore: - is ignored as expected ... */
1464 cifs_parse_mount_err:
1468 int smb3_init_fs_context(struct fs_context *fc)
1470 struct smb3_fs_context *ctx;
1471 char *nodename = utsname()->nodename;
1474 ctx = kzalloc(sizeof(struct smb3_fs_context), GFP_KERNEL);
1478 strscpy(ctx->workstation_name, nodename, sizeof(ctx->workstation_name));
1481 * does not have to be perfect mapping since field is
1482 * informational, only used for servers that do not support
1483 * port 445 and it can be overridden at mount time
1485 memset(ctx->source_rfc1001_name, 0x20, RFC1001_NAME_LEN);
1486 for (i = 0; i < strnlen(nodename, RFC1001_NAME_LEN); i++)
1487 ctx->source_rfc1001_name[i] = toupper(nodename[i]);
1489 ctx->source_rfc1001_name[RFC1001_NAME_LEN] = 0;
1491 * null target name indicates to use *SMBSERVR default called name
1492 * if we end up sending RFC1001 session initialize
1494 ctx->target_rfc1001_name[0] = 0;
1495 ctx->cred_uid = current_uid();
1496 ctx->linux_uid = current_uid();
1497 ctx->linux_gid = current_gid();
1498 /* By default 4MB read ahead size, 1MB block size */
1499 ctx->bsize = CIFS_DEFAULT_IOSIZE; /* can improve cp performance significantly */
1500 ctx->rasize = 0; /* 0 = use default (ie negotiated rsize) for read ahead pages */
1503 * default to SFM style remapping of seven reserved characters
1504 * unless user overrides it or we negotiate CIFS POSIX where
1505 * it is unnecessary. Can not simultaneously use more than one mapping
1506 * since then readdir could list files that open could not open
1510 /* default to only allowing write access to owner of the mount */
1511 ctx->dir_mode = ctx->file_mode = S_IRUGO | S_IXUGO | S_IWUSR;
1513 /* ctx->retry default is 0 (i.e. "soft" limited retry not hard retry) */
1514 /* default is always to request posix paths. */
1515 ctx->posix_paths = 1;
1516 /* default to using server inode numbers where available */
1517 ctx->server_ino = 1;
1519 /* default is to use strict cifs caching semantics */
1520 ctx->strict_io = true;
1522 ctx->acregmax = CIFS_DEF_ACTIMEO;
1523 ctx->acdirmax = CIFS_DEF_ACTIMEO;
1525 /* Most clients set timeout to 0, allows server to use its default */
1526 ctx->handle_timeout = 0; /* See MS-SMB2 spec section 2.2.14.2.12 */
1528 /* offer SMB2.1 and later (SMB3 etc). Secure and widely accepted */
1529 ctx->ops = &smb30_operations;
1530 ctx->vals = &smbdefault_values;
1532 ctx->echo_interval = SMB_ECHO_INTERVAL_DEFAULT;
1534 /* default to no multichannel (single server connection) */
1535 ctx->multichannel = false;
1536 ctx->max_channels = 1;
1538 ctx->backupuid_specified = false; /* no backup intent for a user */
1539 ctx->backupgid_specified = false; /* no backup intent for a group */
1542 * short int override_uid = -1;
1543 * short int override_gid = -1;
1544 * char *nodename = strdup(utsname()->nodename);
1545 * struct sockaddr *dstaddr = (struct sockaddr *)&vol->dstaddr;
1548 fc->fs_private = ctx;
1549 fc->ops = &smb3_fs_context_ops;
1554 smb3_cleanup_fs_context_contents(struct smb3_fs_context *ctx)
1560 * Make sure this stays in sync with smb3_fs_context_dup()
1562 kfree(ctx->mount_options);
1563 ctx->mount_options = NULL;
1564 kfree(ctx->username);
1565 ctx->username = NULL;
1566 kfree_sensitive(ctx->password);
1567 ctx->password = NULL;
1568 kfree(ctx->server_hostname);
1569 ctx->server_hostname = NULL;
1574 kfree(ctx->domainname);
1575 ctx->domainname = NULL;
1576 kfree(ctx->nodename);
1577 ctx->nodename = NULL;
1578 kfree(ctx->iocharset);
1579 ctx->iocharset = NULL;
1580 kfree(ctx->prepath);
1581 ctx->prepath = NULL;
1585 smb3_cleanup_fs_context(struct smb3_fs_context *ctx)
1589 smb3_cleanup_fs_context_contents(ctx);
1593 void smb3_update_mnt_flags(struct cifs_sb_info *cifs_sb)
1595 struct smb3_fs_context *ctx = cifs_sb->ctx;
1598 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_DFS;
1600 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_NO_DFS;
1603 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM;
1605 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_NO_PERM;
1608 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID;
1610 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SET_UID;
1612 if (ctx->setuidfromacl)
1613 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UID_FROM_ACL;
1615 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_UID_FROM_ACL;
1617 if (ctx->server_ino)
1618 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM;
1620 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SERVER_INUM;
1623 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SFM_CHR;
1625 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_MAP_SFM_CHR;
1628 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR;
1630 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_MAP_SPECIAL_CHR;
1633 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR;
1635 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_NO_XATTR;
1638 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL;
1640 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_UNX_EMUL;
1643 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL;
1645 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_NO_BRL;
1647 if (ctx->nohandlecache)
1648 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_HANDLE_CACHE;
1650 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_NO_HANDLE_CACHE;
1652 if (ctx->nostrictsync)
1653 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOSSYNC;
1655 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_NOSSYNC;
1658 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOPOSIXBRL;
1660 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_NOPOSIXBRL;
1662 if (ctx->rwpidforward)
1663 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_RWPIDFORWARD;
1665 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_RWPIDFORWARD;
1668 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MODE_FROM_SID;
1670 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_MODE_FROM_SID;
1673 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL;
1675 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_CIFS_ACL;
1677 if (ctx->backupuid_specified)
1678 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPUID;
1680 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_CIFS_BACKUPUID;
1682 if (ctx->backupgid_specified)
1683 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPGID;
1685 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_CIFS_BACKUPGID;
1687 if (ctx->override_uid)
1688 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID;
1690 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_OVERR_UID;
1692 if (ctx->override_gid)
1693 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID;
1695 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_OVERR_GID;
1698 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM;
1700 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_DYNPERM;
1703 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_FSCACHE;
1705 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_FSCACHE;
1708 cifs_sb->mnt_cifs_flags |= (CIFS_MOUNT_MULTIUSER |
1709 CIFS_MOUNT_NO_PERM);
1711 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_MULTIUSER;
1715 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_STRICT_IO;
1717 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_STRICT_IO;
1720 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO;
1722 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_DIRECT_IO;
1724 if (ctx->mfsymlinks)
1725 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MF_SYMLINKS;
1727 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_MF_SYMLINKS;
1728 if (ctx->mfsymlinks) {
1729 if (ctx->sfu_emul) {
1731 * Our SFU ("Services for Unix" emulation does not allow
1732 * creating symlinks but does allow reading existing SFU
1733 * symlinks (it does allow both creating and reading SFU
1734 * style mknod and FIFOs though). When "mfsymlinks" and
1735 * "sfu" are both enabled at the same time, it allows
1736 * reading both types of symlinks, but will only create
1737 * them with mfsymlinks format. This allows better
1738 * Apple compatibility (probably better for Samba too)
1739 * while still recognizing old Windows style symlinks.
1741 cifs_dbg(VFS, "mount options mfsymlinks and sfu both enabled\n");
1744 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SHUTDOWN;