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 * Parse a devname into substrings and populate the ctx->UNC and ctx->prepath
439 * fields with the result. Returns 0 on success and an error otherwise
440 * (e.g. ENOMEM or EINVAL)
443 smb3_parse_devname(const char *devname, struct smb3_fs_context *ctx)
446 const char *delims = "/\\";
449 if (unlikely(!devname || !*devname)) {
450 cifs_dbg(VFS, "Device name not specified\n");
454 /* make sure we have a valid UNC double delimiter prefix */
455 len = strspn(devname, delims);
459 /* find delimiter between host and sharename */
460 pos = strpbrk(devname + 2, delims);
464 /* record the server hostname */
465 kfree(ctx->server_hostname);
466 ctx->server_hostname = kstrndup(devname + 2, pos - devname - 2, GFP_KERNEL);
467 if (!ctx->server_hostname)
470 /* skip past delimiter */
473 /* now go until next delimiter or end of string */
474 len = strcspn(pos, delims);
476 /* move "pos" up to delimiter or NULL */
479 ctx->UNC = kstrndup(devname, pos - devname, GFP_KERNEL);
483 convert_delimiter(ctx->UNC, '\\');
485 /* skip any delimiter */
486 if (*pos == '/' || *pos == '\\')
492 /* If pos is NULL then no prepath */
496 ctx->prepath = kstrdup(pos, GFP_KERNEL);
503 static void smb3_fs_context_free(struct fs_context *fc);
504 static int smb3_fs_context_parse_param(struct fs_context *fc,
505 struct fs_parameter *param);
506 static int smb3_fs_context_parse_monolithic(struct fs_context *fc,
508 static int smb3_get_tree(struct fs_context *fc);
509 static int smb3_reconfigure(struct fs_context *fc);
511 static const struct fs_context_operations smb3_fs_context_ops = {
512 .free = smb3_fs_context_free,
513 .parse_param = smb3_fs_context_parse_param,
514 .parse_monolithic = smb3_fs_context_parse_monolithic,
515 .get_tree = smb3_get_tree,
516 .reconfigure = smb3_reconfigure,
520 * Parse a monolithic block of data from sys_mount().
521 * smb3_fs_context_parse_monolithic - Parse key[=val][,key[=val]]* mount data
522 * @ctx: The superblock configuration to fill in.
523 * @data: The data to parse
525 * Parse a blob of data that's in key[=val][,key[=val]]* form. This can be
526 * called from the ->monolithic_mount_data() fs_context operation.
528 * Returns 0 on success or the error returned by the ->parse_option() fs_context
529 * operation on failure.
531 static int smb3_fs_context_parse_monolithic(struct fs_context *fc,
534 struct smb3_fs_context *ctx = smb3_fc2context(fc);
535 char *options = data, *key;
541 ctx->mount_options = kstrdup(data, GFP_KERNEL);
542 if (ctx->mount_options == NULL)
545 ret = security_sb_eat_lsm_opts(options, &fc->security);
549 /* BB Need to add support for sep= here TBD */
550 while ((key = strsep(&options, ",")) != NULL) {
557 /* Check if following character is the deliminator If yes,
558 * we have encountered a double deliminator reset the NULL
559 * character to the deliminator
561 while (options && options[0] == ',') {
563 strcpy(key + len, options);
564 options = strchr(options, ',');
571 value = strchr(key, '=');
579 ret = vfs_parse_fs_string(fc, key, value, len);
588 * Validate the preparsed information in the config.
590 static int smb3_fs_context_validate(struct fs_context *fc)
592 struct smb3_fs_context *ctx = smb3_fc2context(fc);
594 if (ctx->rdma && ctx->vals->protocol_id < SMB30_PROT_ID) {
595 cifs_errorf(fc, "SMB Direct requires Version >=3.0\n");
600 /* Muliuser mounts require CONFIG_KEYS support */
601 if (ctx->multiuser) {
602 cifs_errorf(fc, "Multiuser mounts require kernels with CONFIG_KEYS enabled\n");
607 if (ctx->got_version == false)
608 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");
612 cifs_errorf(fc, "CIFS mount error: No usable UNC path provided in device string!\n");
616 /* make sure UNC has a share name */
617 if (strlen(ctx->UNC) < 3 || !strchr(ctx->UNC + 3, '\\')) {
618 cifs_errorf(fc, "Malformed UNC. Unable to find share name.\n");
626 /* No ip= option specified? Try to get it from UNC */
627 /* Use the address part of the UNC. */
628 slash = strchr(&ctx->UNC[2], '\\');
629 len = slash - &ctx->UNC[2];
630 if (!cifs_convert_address((struct sockaddr *)&ctx->dstaddr,
631 &ctx->UNC[2], len)) {
632 pr_err("Unable to determine destination address\n");
633 return -EHOSTUNREACH;
637 /* set the port that we got earlier */
638 cifs_set_port((struct sockaddr *)&ctx->dstaddr, ctx->port);
640 if (ctx->override_uid && !ctx->uid_specified) {
641 ctx->override_uid = 0;
642 pr_notice("ignoring forceuid mount option specified with no uid= option\n");
645 if (ctx->override_gid && !ctx->gid_specified) {
646 ctx->override_gid = 0;
647 pr_notice("ignoring forcegid mount option specified with no gid= option\n");
653 static int smb3_get_tree_common(struct fs_context *fc)
655 struct smb3_fs_context *ctx = smb3_fc2context(fc);
659 root = cifs_smb3_do_mount(fc->fs_type, 0, ctx);
661 return PTR_ERR(root);
669 * Create an SMB3 superblock from the parameters passed.
671 static int smb3_get_tree(struct fs_context *fc)
673 int err = smb3_fs_context_validate(fc);
677 return smb3_get_tree_common(fc);
680 static void smb3_fs_context_free(struct fs_context *fc)
682 struct smb3_fs_context *ctx = smb3_fc2context(fc);
684 smb3_cleanup_fs_context(ctx);
688 * Compare the old and new proposed context during reconfigure
689 * and check if the changes are compatible.
691 static int smb3_verify_reconfigure_ctx(struct fs_context *fc,
692 struct smb3_fs_context *new_ctx,
693 struct smb3_fs_context *old_ctx)
695 if (new_ctx->posix_paths != old_ctx->posix_paths) {
696 cifs_errorf(fc, "can not change posixpaths during remount\n");
699 if (new_ctx->sectype != old_ctx->sectype) {
700 cifs_errorf(fc, "can not change sec during remount\n");
703 if (new_ctx->multiuser != old_ctx->multiuser) {
704 cifs_errorf(fc, "can not change multiuser during remount\n");
708 (!old_ctx->UNC || strcmp(new_ctx->UNC, old_ctx->UNC))) {
709 cifs_errorf(fc, "can not change UNC during remount\n");
712 if (new_ctx->username &&
713 (!old_ctx->username || strcmp(new_ctx->username, old_ctx->username))) {
714 cifs_errorf(fc, "can not change username during remount\n");
717 if (new_ctx->password &&
718 (!old_ctx->password || strcmp(new_ctx->password, old_ctx->password))) {
719 cifs_errorf(fc, "can not change password during remount\n");
722 if (new_ctx->domainname &&
723 (!old_ctx->domainname || strcmp(new_ctx->domainname, old_ctx->domainname))) {
724 cifs_errorf(fc, "can not change domainname during remount\n");
727 if (new_ctx->workstation_name &&
728 (!old_ctx->workstation_name || strcmp(new_ctx->workstation_name, old_ctx->workstation_name))) {
729 cifs_errorf(fc, "can not change workstation_name during remount\n");
732 if (new_ctx->nodename &&
733 (!old_ctx->nodename || strcmp(new_ctx->nodename, old_ctx->nodename))) {
734 cifs_errorf(fc, "can not change nodename during remount\n");
737 if (new_ctx->iocharset &&
738 (!old_ctx->iocharset || strcmp(new_ctx->iocharset, old_ctx->iocharset))) {
739 cifs_errorf(fc, "can not change iocharset during remount\n");
746 #define STEAL_STRING(cifs_sb, ctx, field) \
749 ctx->field = cifs_sb->ctx->field; \
750 cifs_sb->ctx->field = NULL; \
753 static int smb3_reconfigure(struct fs_context *fc)
755 struct smb3_fs_context *ctx = smb3_fc2context(fc);
756 struct dentry *root = fc->root;
757 struct cifs_sb_info *cifs_sb = CIFS_SB(root->d_sb);
760 rc = smb3_verify_reconfigure_ctx(fc, ctx, cifs_sb->ctx);
765 * We can not change UNC/username/password/domainname/
766 * workstation_name/nodename/iocharset
767 * during reconnect so ignore what we have in the new context and
768 * just use what we already have in cifs_sb->ctx.
770 STEAL_STRING(cifs_sb, ctx, UNC);
771 STEAL_STRING(cifs_sb, ctx, source);
772 STEAL_STRING(cifs_sb, ctx, username);
773 STEAL_STRING(cifs_sb, ctx, password);
774 STEAL_STRING(cifs_sb, ctx, domainname);
775 STEAL_STRING(cifs_sb, ctx, workstation_name);
776 STEAL_STRING(cifs_sb, ctx, nodename);
777 STEAL_STRING(cifs_sb, ctx, iocharset);
779 /* if rsize or wsize not passed in on remount, use previous values */
781 ctx->rsize = cifs_sb->ctx->rsize;
783 ctx->wsize = cifs_sb->ctx->wsize;
786 smb3_cleanup_fs_context_contents(cifs_sb->ctx);
787 rc = smb3_fs_context_dup(cifs_sb->ctx, ctx);
788 smb3_update_mnt_flags(cifs_sb);
789 #ifdef CONFIG_CIFS_DFS_UPCALL
791 rc = dfs_cache_remount_fs(cifs_sb);
797 static int smb3_fs_context_parse_param(struct fs_context *fc,
798 struct fs_parameter *param)
800 struct fs_parse_result result;
801 struct smb3_fs_context *ctx = smb3_fc2context(fc);
803 bool is_smb3 = !strcmp(fc->fs_type->name, "smb3");
804 bool skip_parsing = false;
808 cifs_dbg(FYI, "CIFS: parsing cifs mount option '%s'\n", param->key);
811 * fs_parse can not handle string options with an empty value so
812 * we will need special handling of them.
814 if (param->type == fs_value_is_string && param->string[0] == 0) {
815 if (!strcmp("pass", param->key) || !strcmp("password", param->key)) {
818 } else if (!strcmp("user", param->key) || !strcmp("username", param->key)) {
825 opt = fs_parse(fc, smb3_fs_parameters, param, &result);
827 return ctx->sloppy ? 1 : opt;
832 ctx->compression = UNKNOWN_TYPE;
834 "SMB3 compression support is experimental\n");
856 ctx->sfu_remap = false; /* disable SFU mapping */
867 ctx->override_uid = 0;
869 ctx->override_uid = 1;
873 ctx->override_gid = 0;
875 ctx->override_gid = 1;
895 case Opt_noblocksend:
907 case Opt_multichannel:
908 if (result.negated) {
909 ctx->multichannel = false;
910 ctx->max_channels = 1;
912 ctx->multichannel = true;
913 /* if number of channels not specified, default to 2 */
914 if (ctx->max_channels < 2)
915 ctx->max_channels = 2;
919 uid = make_kuid(current_user_ns(), result.uint_32);
921 goto cifs_parse_mount_err;
922 ctx->linux_uid = uid;
923 ctx->uid_specified = true;
926 uid = make_kuid(current_user_ns(), result.uint_32);
928 goto cifs_parse_mount_err;
930 ctx->cruid_specified = true;
933 uid = make_kuid(current_user_ns(), result.uint_32);
935 goto cifs_parse_mount_err;
936 ctx->backupuid = uid;
937 ctx->backupuid_specified = true;
940 gid = make_kgid(current_user_ns(), result.uint_32);
942 goto cifs_parse_mount_err;
943 ctx->backupgid = gid;
944 ctx->backupgid_specified = true;
947 gid = make_kgid(current_user_ns(), result.uint_32);
949 goto cifs_parse_mount_err;
950 ctx->linux_gid = gid;
951 ctx->gid_specified = true;
954 ctx->port = result.uint_32;
957 ctx->file_mode = result.uint_32;
960 ctx->dir_mode = result.uint_32;
962 case Opt_min_enc_offload:
963 ctx->min_offload = result.uint_32;
967 * inode blocksize realistically should never need to be
968 * less than 16K or greater than 16M and default is 1MB.
969 * Note that small inode block sizes (e.g. 64K) can lead
970 * to very poor performance of common tools like cp and scp
972 if ((result.uint_32 < CIFS_MAX_MSGSIZE) ||
973 (result.uint_32 > (4 * SMB3_DEFAULT_IOSIZE))) {
974 cifs_errorf(fc, "%s: Invalid blocksize\n",
976 goto cifs_parse_mount_err;
978 ctx->bsize = result.uint_32;
979 ctx->got_bsize = true;
983 * readahead size realistically should never need to be
984 * less than 1M (CIFS_DEFAULT_IOSIZE) or greater than 32M
985 * (perhaps an exception should be considered in the
986 * for the case of a large number of channels
987 * when multichannel is negotiated) since that would lead
988 * to plenty of parallel I/O in flight to the server.
989 * Note that smaller read ahead sizes would
990 * hurt performance of common tools like cp and scp
991 * which often trigger sequential i/o with read ahead
993 if ((result.uint_32 > (8 * SMB3_DEFAULT_IOSIZE)) ||
994 (result.uint_32 < CIFS_DEFAULT_IOSIZE)) {
995 cifs_errorf(fc, "%s: Invalid rasize %d vs. %d\n",
996 __func__, result.uint_32, SMB3_DEFAULT_IOSIZE);
997 goto cifs_parse_mount_err;
999 ctx->rasize = result.uint_32;
1002 ctx->rsize = result.uint_32;
1003 ctx->got_rsize = true;
1006 ctx->wsize = result.uint_32;
1007 ctx->got_wsize = true;
1010 ctx->acregmax = HZ * result.uint_32;
1011 if (ctx->acregmax > CIFS_MAX_ACTIMEO) {
1012 cifs_errorf(fc, "acregmax too large\n");
1013 goto cifs_parse_mount_err;
1017 ctx->acdirmax = HZ * result.uint_32;
1018 if (ctx->acdirmax > CIFS_MAX_ACTIMEO) {
1019 cifs_errorf(fc, "acdirmax too large\n");
1020 goto cifs_parse_mount_err;
1024 if (HZ * result.uint_32 > CIFS_MAX_ACTIMEO) {
1025 cifs_errorf(fc, "timeout too large\n");
1026 goto cifs_parse_mount_err;
1028 if ((ctx->acdirmax != CIFS_DEF_ACTIMEO) ||
1029 (ctx->acregmax != CIFS_DEF_ACTIMEO)) {
1030 cifs_errorf(fc, "actimeo ignored since acregmax or acdirmax specified\n");
1033 ctx->acdirmax = ctx->acregmax = HZ * result.uint_32;
1035 case Opt_echo_interval:
1036 ctx->echo_interval = result.uint_32;
1039 ctx->snapshot_time = result.uint_32;
1041 case Opt_max_credits:
1042 if (result.uint_32 < 20 || result.uint_32 > 60000) {
1043 cifs_errorf(fc, "%s: Invalid max_credits value\n",
1045 goto cifs_parse_mount_err;
1047 ctx->max_credits = result.uint_32;
1049 case Opt_max_channels:
1050 if (result.uint_32 < 1 || result.uint_32 > CIFS_MAX_CHANNELS) {
1051 cifs_errorf(fc, "%s: Invalid max_channels value, needs to be 1-%d\n",
1052 __func__, CIFS_MAX_CHANNELS);
1053 goto cifs_parse_mount_err;
1055 ctx->max_channels = result.uint_32;
1056 /* If more than one channel requested ... they want multichan */
1057 if (result.uint_32 > 1)
1058 ctx->multichannel = true;
1060 case Opt_handletimeout:
1061 ctx->handle_timeout = result.uint_32;
1062 if (ctx->handle_timeout > SMB3_MAX_HANDLE_TIMEOUT) {
1063 cifs_errorf(fc, "Invalid handle cache timeout, longer than 16 minutes\n");
1064 goto cifs_parse_mount_err;
1070 switch (smb3_parse_devname(param->string, ctx)) {
1074 cifs_errorf(fc, "Unable to allocate memory for devname\n");
1075 goto cifs_parse_mount_err;
1077 cifs_errorf(fc, "Malformed UNC in devname\n");
1078 goto cifs_parse_mount_err;
1080 cifs_errorf(fc, "Unknown error parsing devname\n");
1081 goto cifs_parse_mount_err;
1083 ctx->source = kstrdup(param->string, GFP_KERNEL);
1084 if (ctx->source == NULL) {
1085 cifs_errorf(fc, "OOM when copying UNC string\n");
1086 goto cifs_parse_mount_err;
1088 fc->source = kstrdup(param->string, GFP_KERNEL);
1089 if (fc->source == NULL) {
1090 cifs_errorf(fc, "OOM when copying UNC string\n");
1091 goto cifs_parse_mount_err;
1095 kfree(ctx->username);
1096 ctx->username = NULL;
1097 if (strlen(param->string) == 0) {
1098 /* null user, ie. anonymous authentication */
1103 if (strnlen(param->string, CIFS_MAX_USERNAME_LEN) >
1104 CIFS_MAX_USERNAME_LEN) {
1105 pr_warn("username too long\n");
1106 goto cifs_parse_mount_err;
1108 ctx->username = kstrdup(param->string, GFP_KERNEL);
1109 if (ctx->username == NULL) {
1110 cifs_errorf(fc, "OOM when copying username string\n");
1111 goto cifs_parse_mount_err;
1115 kfree(ctx->password);
1116 ctx->password = NULL;
1117 if (strlen(param->string) == 0)
1120 ctx->password = kstrdup(param->string, GFP_KERNEL);
1121 if (ctx->password == NULL) {
1122 cifs_errorf(fc, "OOM when copying password string\n");
1123 goto cifs_parse_mount_err;
1127 if (strlen(param->string) == 0) {
1128 ctx->got_ip = false;
1131 if (!cifs_convert_address((struct sockaddr *)&ctx->dstaddr,
1133 strlen(param->string))) {
1134 pr_err("bad ip= option (%s)\n", param->string);
1135 goto cifs_parse_mount_err;
1140 if (strnlen(param->string, CIFS_MAX_DOMAINNAME_LEN)
1141 == CIFS_MAX_DOMAINNAME_LEN) {
1142 pr_warn("domain name too long\n");
1143 goto cifs_parse_mount_err;
1146 kfree(ctx->domainname);
1147 ctx->domainname = kstrdup(param->string, GFP_KERNEL);
1148 if (ctx->domainname == NULL) {
1149 cifs_errorf(fc, "OOM when copying domainname string\n");
1150 goto cifs_parse_mount_err;
1152 cifs_dbg(FYI, "Domain name set\n");
1155 if (!cifs_convert_address(
1156 (struct sockaddr *)&ctx->srcaddr,
1157 param->string, strlen(param->string))) {
1158 pr_warn("Could not parse srcaddr: %s\n",
1160 goto cifs_parse_mount_err;
1164 if (strnlen(param->string, 1024) >= 65) {
1165 pr_warn("iocharset name too long\n");
1166 goto cifs_parse_mount_err;
1169 if (strncasecmp(param->string, "default", 7) != 0) {
1170 kfree(ctx->iocharset);
1171 ctx->iocharset = kstrdup(param->string, GFP_KERNEL);
1172 if (ctx->iocharset == NULL) {
1173 cifs_errorf(fc, "OOM when copying iocharset string\n");
1174 goto cifs_parse_mount_err;
1177 /* if iocharset not set then load_nls_default
1180 cifs_dbg(FYI, "iocharset set to %s\n", ctx->iocharset);
1182 case Opt_netbiosname:
1183 memset(ctx->source_rfc1001_name, 0x20,
1186 * FIXME: are there cases in which a comma can
1187 * be valid in workstation netbios name (and
1188 * need special handling)?
1190 for (i = 0; i < RFC1001_NAME_LEN; i++) {
1191 /* don't ucase netbiosname for user */
1192 if (param->string[i] == 0)
1194 ctx->source_rfc1001_name[i] = param->string[i];
1196 /* The string has 16th byte zero still from
1197 * set at top of the function
1199 if (i == RFC1001_NAME_LEN && param->string[i] != 0)
1200 pr_warn("netbiosname longer than 15 truncated\n");
1203 /* last byte, type, is 0x20 for servr type */
1204 memset(ctx->target_rfc1001_name, 0x20,
1205 RFC1001_NAME_LEN_WITH_NULL);
1207 * BB are there cases in which a comma can be valid in this
1208 * workstation netbios name (and need special handling)?
1211 /* user or mount helper must uppercase the netbios name */
1212 for (i = 0; i < 15; i++) {
1213 if (param->string[i] == 0)
1215 ctx->target_rfc1001_name[i] = param->string[i];
1218 /* The string has 16th byte zero still from set at top of function */
1219 if (i == RFC1001_NAME_LEN && param->string[i] != 0)
1220 pr_warn("server netbiosname longer than 15 truncated\n");
1223 /* version of mount userspace tools, not dialect */
1224 /* If interface changes in mount.cifs bump to new ver */
1225 if (strncasecmp(param->string, "1", 1) == 0) {
1226 if (strlen(param->string) > 1) {
1227 pr_warn("Bad mount helper ver=%s. Did you want SMB1 (CIFS) dialect and mean to type vers=1.0 instead?\n",
1229 goto cifs_parse_mount_err;
1231 /* This is the default */
1234 /* For all other value, error */
1235 pr_warn("Invalid mount helper version specified\n");
1236 goto cifs_parse_mount_err;
1238 /* protocol version (dialect) */
1239 if (cifs_parse_smb_version(fc, param->string, ctx, is_smb3) != 0)
1240 goto cifs_parse_mount_err;
1241 ctx->got_version = true;
1244 if (cifs_parse_security_flavors(fc, param->string, ctx) != 0)
1245 goto cifs_parse_mount_err;
1248 if (cifs_parse_cache_flavor(fc, param->string, ctx) != 0)
1249 goto cifs_parse_mount_err;
1252 #ifndef CONFIG_CIFS_SWN_UPCALL
1253 cifs_errorf(fc, "Witness support needs CONFIG_CIFS_SWN_UPCALL config option\n");
1254 goto cifs_parse_mount_err;
1256 ctx->witness = true;
1257 pr_warn_once("Witness protocol support is experimental\n");
1260 #ifndef CONFIG_CIFS_ROOT
1261 cifs_dbg(VFS, "rootfs support requires CONFIG_CIFS_ROOT config option\n");
1262 goto cifs_parse_mount_err;
1266 case Opt_posixpaths:
1268 ctx->posix_paths = 0;
1270 ctx->posix_paths = 1;
1273 if (result.negated) {
1274 if (ctx->linux_ext == 1)
1275 pr_warn_once("conflicting posix mount options specified\n");
1277 ctx->no_linux_ext = 1;
1279 if (ctx->no_linux_ext == 1)
1280 pr_warn_once("conflicting posix mount options specified\n");
1282 ctx->no_linux_ext = 0;
1289 if (result.negated) {
1291 * turn off mandatory locking in mode
1292 * if remote locking is turned off since the
1293 * local vfs will do advisory
1295 if (ctx->file_mode ==
1296 (S_IALLUGO & ~(S_ISUID | S_IXGRP)))
1297 ctx->file_mode = S_IALLUGO;
1302 case Opt_handlecache:
1304 ctx->nohandlecache = 1;
1306 ctx->nohandlecache = 0;
1308 case Opt_forcemandatorylock:
1312 ctx->setuids = result.negated;
1315 ctx->intr = !result.negated;
1317 case Opt_setuidfromacl:
1318 ctx->setuidfromacl = 1;
1320 case Opt_strictsync:
1321 ctx->nostrictsync = result.negated;
1324 ctx->server_ino = !result.negated;
1326 case Opt_rwpidforward:
1327 ctx->rwpidforward = 1;
1333 ctx->cifs_acl = !result.negated;
1336 ctx->no_psx_acl = result.negated;
1338 case Opt_locallease:
1339 ctx->local_lease = 1;
1344 case Opt_ignore_signature:
1346 ctx->ignore_signature = true;
1349 /* we do not do the following in secFlags because seal
1350 * is a per tree connection (mount) not a per socket
1351 * or per-smb connection option in the protocol
1352 * vol->secFlg |= CIFSSEC_MUST_SEAL;
1357 pr_warn("Mount option noac not supported. Instead set /proc/fs/cifs/LookupCacheEnabled to 0\n");
1360 #ifndef CONFIG_CIFS_FSCACHE
1361 cifs_errorf(fc, "FS-Cache support needs CONFIG_CIFS_FSCACHE kernel config option set\n");
1362 goto cifs_parse_mount_err;
1366 case Opt_mfsymlinks:
1367 ctx->mfsymlinks = true;
1370 ctx->multiuser = true;
1375 case Opt_nosharesock:
1376 ctx->nosharesock = true;
1378 case Opt_persistent:
1379 if (result.negated) {
1380 ctx->nopersistent = true;
1381 if (ctx->persistent) {
1382 cifs_errorf(fc, "persistenthandles mount options conflict\n");
1383 goto cifs_parse_mount_err;
1386 ctx->persistent = true;
1387 if ((ctx->nopersistent) || (ctx->resilient)) {
1388 cifs_errorf(fc, "persistenthandles mount options conflict\n");
1389 goto cifs_parse_mount_err;
1394 if (result.negated) {
1395 ctx->resilient = false; /* already the default */
1397 ctx->resilient = true;
1398 if (ctx->persistent) {
1399 cifs_errorf(fc, "persistenthandles mount options conflict\n");
1400 goto cifs_parse_mount_err;
1404 case Opt_tcp_nodelay:
1405 /* tcp nodelay should not usually be needed since we CORK/UNCORK the socket */
1407 ctx->sockopt_tcp_nodelay = false;
1409 ctx->sockopt_tcp_nodelay = true;
1411 case Opt_domainauto:
1412 ctx->domainauto = true;
1418 /* case Opt_ignore: - is ignored as expected ... */
1422 cifs_parse_mount_err:
1426 int smb3_init_fs_context(struct fs_context *fc)
1429 struct smb3_fs_context *ctx;
1430 char *nodename = utsname()->nodename;
1433 ctx = kzalloc(sizeof(struct smb3_fs_context), GFP_KERNEL);
1434 if (unlikely(!ctx)) {
1439 ctx->workstation_name = kstrdup(nodename, GFP_KERNEL);
1440 if (unlikely(!ctx->workstation_name)) {
1446 * does not have to be perfect mapping since field is
1447 * informational, only used for servers that do not support
1448 * port 445 and it can be overridden at mount time
1450 memset(ctx->source_rfc1001_name, 0x20, RFC1001_NAME_LEN);
1451 for (i = 0; i < strnlen(nodename, RFC1001_NAME_LEN); i++)
1452 ctx->source_rfc1001_name[i] = toupper(nodename[i]);
1454 ctx->source_rfc1001_name[RFC1001_NAME_LEN] = 0;
1456 * null target name indicates to use *SMBSERVR default called name
1457 * if we end up sending RFC1001 session initialize
1459 ctx->target_rfc1001_name[0] = 0;
1460 ctx->cred_uid = current_uid();
1461 ctx->linux_uid = current_uid();
1462 ctx->linux_gid = current_gid();
1463 /* By default 4MB read ahead size, 1MB block size */
1464 ctx->bsize = CIFS_DEFAULT_IOSIZE; /* can improve cp performance significantly */
1465 ctx->rasize = 0; /* 0 = use default (ie negotiated rsize) for read ahead pages */
1468 * default to SFM style remapping of seven reserved characters
1469 * unless user overrides it or we negotiate CIFS POSIX where
1470 * it is unnecessary. Can not simultaneously use more than one mapping
1471 * since then readdir could list files that open could not open
1475 /* default to only allowing write access to owner of the mount */
1476 ctx->dir_mode = ctx->file_mode = S_IRUGO | S_IXUGO | S_IWUSR;
1478 /* ctx->retry default is 0 (i.e. "soft" limited retry not hard retry) */
1479 /* default is always to request posix paths. */
1480 ctx->posix_paths = 1;
1481 /* default to using server inode numbers where available */
1482 ctx->server_ino = 1;
1484 /* default is to use strict cifs caching semantics */
1485 ctx->strict_io = true;
1487 ctx->acregmax = CIFS_DEF_ACTIMEO;
1488 ctx->acdirmax = CIFS_DEF_ACTIMEO;
1490 /* Most clients set timeout to 0, allows server to use its default */
1491 ctx->handle_timeout = 0; /* See MS-SMB2 spec section 2.2.14.2.12 */
1493 /* offer SMB2.1 and later (SMB3 etc). Secure and widely accepted */
1494 ctx->ops = &smb30_operations;
1495 ctx->vals = &smbdefault_values;
1497 ctx->echo_interval = SMB_ECHO_INTERVAL_DEFAULT;
1499 /* default to no multichannel (single server connection) */
1500 ctx->multichannel = false;
1501 ctx->max_channels = 1;
1503 ctx->backupuid_specified = false; /* no backup intent for a user */
1504 ctx->backupgid_specified = false; /* no backup intent for a group */
1507 * short int override_uid = -1;
1508 * short int override_gid = -1;
1509 * char *nodename = strdup(utsname()->nodename);
1510 * struct sockaddr *dstaddr = (struct sockaddr *)&vol->dstaddr;
1513 fc->fs_private = ctx;
1514 fc->ops = &smb3_fs_context_ops;
1519 kfree(ctx->workstation_name);
1527 smb3_cleanup_fs_context_contents(struct smb3_fs_context *ctx)
1533 * Make sure this stays in sync with smb3_fs_context_dup()
1535 kfree(ctx->mount_options);
1536 ctx->mount_options = NULL;
1537 kfree(ctx->username);
1538 ctx->username = NULL;
1539 kfree_sensitive(ctx->password);
1540 ctx->password = NULL;
1541 kfree(ctx->server_hostname);
1542 ctx->server_hostname = NULL;
1547 kfree(ctx->domainname);
1548 ctx->domainname = NULL;
1549 kfree(ctx->workstation_name);
1550 ctx->workstation_name = NULL;
1551 kfree(ctx->nodename);
1552 ctx->nodename = NULL;
1553 kfree(ctx->iocharset);
1554 ctx->iocharset = NULL;
1555 kfree(ctx->prepath);
1556 ctx->prepath = NULL;
1560 smb3_cleanup_fs_context(struct smb3_fs_context *ctx)
1564 smb3_cleanup_fs_context_contents(ctx);
1568 void smb3_update_mnt_flags(struct cifs_sb_info *cifs_sb)
1570 struct smb3_fs_context *ctx = cifs_sb->ctx;
1573 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_DFS;
1575 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_NO_DFS;
1578 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM;
1580 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_NO_PERM;
1583 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID;
1585 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SET_UID;
1587 if (ctx->setuidfromacl)
1588 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UID_FROM_ACL;
1590 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_UID_FROM_ACL;
1592 if (ctx->server_ino)
1593 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM;
1595 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SERVER_INUM;
1598 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SFM_CHR;
1600 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_MAP_SFM_CHR;
1603 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR;
1605 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_MAP_SPECIAL_CHR;
1608 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR;
1610 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_NO_XATTR;
1613 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL;
1615 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_UNX_EMUL;
1618 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL;
1620 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_NO_BRL;
1622 if (ctx->nohandlecache)
1623 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_HANDLE_CACHE;
1625 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_NO_HANDLE_CACHE;
1627 if (ctx->nostrictsync)
1628 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOSSYNC;
1630 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_NOSSYNC;
1633 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOPOSIXBRL;
1635 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_NOPOSIXBRL;
1637 if (ctx->rwpidforward)
1638 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_RWPIDFORWARD;
1640 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_RWPIDFORWARD;
1643 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MODE_FROM_SID;
1645 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_MODE_FROM_SID;
1648 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL;
1650 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_CIFS_ACL;
1652 if (ctx->backupuid_specified)
1653 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPUID;
1655 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_CIFS_BACKUPUID;
1657 if (ctx->backupgid_specified)
1658 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPGID;
1660 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_CIFS_BACKUPGID;
1662 if (ctx->override_uid)
1663 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID;
1665 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_OVERR_UID;
1667 if (ctx->override_gid)
1668 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID;
1670 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_OVERR_GID;
1673 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM;
1675 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_DYNPERM;
1678 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_FSCACHE;
1680 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_FSCACHE;
1683 cifs_sb->mnt_cifs_flags |= (CIFS_MOUNT_MULTIUSER |
1684 CIFS_MOUNT_NO_PERM);
1686 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_MULTIUSER;
1690 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_STRICT_IO;
1692 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_STRICT_IO;
1695 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO;
1697 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_DIRECT_IO;
1699 if (ctx->mfsymlinks)
1700 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MF_SYMLINKS;
1702 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_MF_SYMLINKS;
1703 if (ctx->mfsymlinks) {
1704 if (ctx->sfu_emul) {
1706 * Our SFU ("Services for Unix" emulation does not allow
1707 * creating symlinks but does allow reading existing SFU
1708 * symlinks (it does allow both creating and reading SFU
1709 * style mknod and FIFOs though). When "mfsymlinks" and
1710 * "sfu" are both enabled at the same time, it allows
1711 * reading both types of symlinks, but will only create
1712 * them with mfsymlinks format. This allows better
1713 * Apple compatibility (probably better for Samba too)
1714 * while still recognizing old Windows style symlinks.
1716 cifs_dbg(VFS, "mount options mfsymlinks and sfu both enabled\n");
1719 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SHUTDOWN;