1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Copyright (C) 2020, Microsoft Corporation.
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("closetimeo", Opt_closetimeo),
151 fsparam_u32("echo_interval", Opt_echo_interval),
152 fsparam_u32("max_credits", Opt_max_credits),
153 fsparam_u32("handletimeout", Opt_handletimeout),
154 fsparam_u64("snapshot", Opt_snapshot),
155 fsparam_u32("max_channels", Opt_max_channels),
157 /* Mount options which take string value */
158 fsparam_string("source", Opt_source),
159 fsparam_string("user", Opt_user),
160 fsparam_string("username", Opt_user),
161 fsparam_string("pass", Opt_pass),
162 fsparam_string("password", Opt_pass),
163 fsparam_string("ip", Opt_ip),
164 fsparam_string("addr", Opt_ip),
165 fsparam_string("domain", Opt_domain),
166 fsparam_string("dom", Opt_domain),
167 fsparam_string("srcaddr", Opt_srcaddr),
168 fsparam_string("iocharset", Opt_iocharset),
169 fsparam_string("netbiosname", Opt_netbiosname),
170 fsparam_string("servern", Opt_servern),
171 fsparam_string("ver", Opt_ver),
172 fsparam_string("vers", Opt_vers),
173 fsparam_string("sec", Opt_sec),
174 fsparam_string("cache", Opt_cache),
176 /* Arguments that should be ignored */
177 fsparam_flag("guest", Opt_ignore),
178 fsparam_flag("noatime", Opt_ignore),
179 fsparam_flag("relatime", Opt_ignore),
180 fsparam_flag("_netdev", Opt_ignore),
181 fsparam_flag_no("suid", Opt_ignore),
182 fsparam_flag_no("exec", Opt_ignore),
183 fsparam_flag_no("dev", Opt_ignore),
184 fsparam_flag_no("mand", Opt_ignore),
185 fsparam_flag_no("auto", Opt_ignore),
186 fsparam_string("cred", Opt_ignore),
187 fsparam_string("credentials", Opt_ignore),
189 * UNC and prefixpath is now extracted from Opt_source
190 * in the new mount API so we can just ignore them going forward.
192 fsparam_string("unc", Opt_ignore),
193 fsparam_string("prefixpath", Opt_ignore),
198 cifs_parse_security_flavors(struct fs_context *fc, char *value, struct smb3_fs_context *ctx)
201 substring_t args[MAX_OPT_ARGS];
204 * With mount options, the last one should win. Reset any existing
205 * settings back to default.
207 ctx->sectype = Unspecified;
210 switch (match_token(value, cifs_secflavor_tokens, args)) {
212 cifs_errorf(fc, "sec=krb5p is not supported!\n");
218 ctx->sectype = Kerberos;
220 case Opt_sec_ntlmsspi:
223 case Opt_sec_ntlmssp:
224 ctx->sectype = RawNTLMSSP;
226 case Opt_sec_ntlmv2i:
230 ctx->sectype = NTLMv2;
236 cifs_errorf(fc, "bad security option: %s\n", value);
243 static const match_table_t cifs_cacheflavor_tokens = {
244 { Opt_cache_loose, "loose" },
245 { Opt_cache_strict, "strict" },
246 { Opt_cache_none, "none" },
247 { Opt_cache_ro, "ro" },
248 { Opt_cache_rw, "singleclient" },
249 { Opt_cache_err, NULL }
253 cifs_parse_cache_flavor(struct fs_context *fc, char *value, struct smb3_fs_context *ctx)
255 substring_t args[MAX_OPT_ARGS];
257 switch (match_token(value, cifs_cacheflavor_tokens, args)) {
258 case Opt_cache_loose:
259 ctx->direct_io = false;
260 ctx->strict_io = false;
261 ctx->cache_ro = false;
262 ctx->cache_rw = false;
264 case Opt_cache_strict:
265 ctx->direct_io = false;
266 ctx->strict_io = true;
267 ctx->cache_ro = false;
268 ctx->cache_rw = false;
271 ctx->direct_io = true;
272 ctx->strict_io = false;
273 ctx->cache_ro = false;
274 ctx->cache_rw = false;
277 ctx->direct_io = false;
278 ctx->strict_io = false;
279 ctx->cache_ro = true;
280 ctx->cache_rw = false;
283 ctx->direct_io = false;
284 ctx->strict_io = false;
285 ctx->cache_ro = false;
286 ctx->cache_rw = true;
289 cifs_errorf(fc, "bad cache= option: %s\n", value);
295 #define DUP_CTX_STR(field) \
298 new_ctx->field = kstrdup(ctx->field, GFP_ATOMIC); \
299 if (new_ctx->field == NULL) { \
300 smb3_cleanup_fs_context_contents(new_ctx); \
307 smb3_fs_context_dup(struct smb3_fs_context *new_ctx, struct smb3_fs_context *ctx)
309 memcpy(new_ctx, ctx, sizeof(*ctx));
310 new_ctx->prepath = NULL;
311 new_ctx->mount_options = NULL;
312 new_ctx->nodename = NULL;
313 new_ctx->username = NULL;
314 new_ctx->password = NULL;
315 new_ctx->server_hostname = NULL;
316 new_ctx->domainname = NULL;
318 new_ctx->source = NULL;
319 new_ctx->iocharset = NULL;
321 * Make sure to stay in sync with smb3_cleanup_fs_context_contents()
323 DUP_CTX_STR(prepath);
324 DUP_CTX_STR(mount_options);
325 DUP_CTX_STR(username);
326 DUP_CTX_STR(password);
327 DUP_CTX_STR(server_hostname);
330 DUP_CTX_STR(domainname);
331 DUP_CTX_STR(nodename);
332 DUP_CTX_STR(iocharset);
338 cifs_parse_smb_version(struct fs_context *fc, char *value, struct smb3_fs_context *ctx, bool is_smb3)
340 substring_t args[MAX_OPT_ARGS];
342 switch (match_token(value, cifs_smb_version_tokens, args)) {
343 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
345 if (disable_legacy_dialects) {
346 cifs_errorf(fc, "mount with legacy dialect disabled\n");
350 cifs_errorf(fc, "vers=1.0 (cifs) not permitted when mounting with smb3\n");
353 cifs_errorf(fc, "Use of the less secure dialect vers=1.0 is not recommended unless required for access to very old servers\n");
354 ctx->ops = &smb1_operations;
355 ctx->vals = &smb1_values;
358 if (disable_legacy_dialects) {
359 cifs_errorf(fc, "mount with legacy dialect disabled\n");
363 cifs_errorf(fc, "vers=2.0 not permitted when mounting with smb3\n");
366 ctx->ops = &smb20_operations;
367 ctx->vals = &smb20_values;
371 cifs_errorf(fc, "vers=1.0 (cifs) mount not permitted when legacy dialects disabled\n");
374 cifs_errorf(fc, "vers=2.0 mount not permitted when legacy dialects disabled\n");
376 #endif /* CIFS_ALLOW_INSECURE_LEGACY */
378 ctx->ops = &smb21_operations;
379 ctx->vals = &smb21_values;
382 ctx->ops = &smb30_operations;
383 ctx->vals = &smb30_values;
386 ctx->ops = &smb30_operations; /* currently identical with 3.0 */
387 ctx->vals = &smb302_values;
390 ctx->ops = &smb311_operations;
391 ctx->vals = &smb311_values;
394 ctx->ops = &smb30_operations; /* currently identical with 3.0 */
395 ctx->vals = &smb3any_values;
398 ctx->ops = &smb30_operations;
399 ctx->vals = &smbdefault_values;
402 cifs_errorf(fc, "Unknown vers= option specified: %s\n", value);
408 int smb3_parse_opt(const char *options, const char *key, char **val)
411 char *opts, *orig, *p;
413 orig = opts = kstrdup(options, GFP_KERNEL);
417 while ((p = strsep(&opts, ","))) {
422 if (strncasecmp(p, key, strlen(key)))
424 nval = strchr(p, '=');
429 *val = kstrdup(nval, GFP_KERNEL);
430 rc = !*val ? -ENOMEM : 0;
440 * Remove duplicate path delimiters. Windows is supposed to do that
441 * but there are some bugs that prevent rename from working if there are
442 * multiple delimiters.
444 * Returns a sanitized duplicate of @path. The caller is responsible for
445 * cleaning up the original.
447 #define IS_DELIM(c) ((c) == '/' || (c) == '\\')
448 static char *sanitize_path(char *path)
450 char *cursor1 = path, *cursor2 = path;
452 /* skip all prepended delimiters */
453 while (IS_DELIM(*cursor1))
456 /* copy the first letter */
459 /* copy the remainder... */
460 while (*(cursor1++)) {
461 /* ... skipping all duplicated delimiters */
462 if (IS_DELIM(*cursor1) && IS_DELIM(*cursor2))
464 *(++cursor2) = *cursor1;
467 /* if the last character is a delimiter, skip it */
468 if (IS_DELIM(*(cursor2 - 1)))
472 return kstrdup(path, GFP_KERNEL);
476 * Parse a devname into substrings and populate the ctx->UNC and ctx->prepath
477 * fields with the result. Returns 0 on success and an error otherwise
478 * (e.g. ENOMEM or EINVAL)
481 smb3_parse_devname(const char *devname, struct smb3_fs_context *ctx)
484 const char *delims = "/\\";
487 if (unlikely(!devname || !*devname)) {
488 cifs_dbg(VFS, "Device name not specified\n");
492 /* make sure we have a valid UNC double delimiter prefix */
493 len = strspn(devname, delims);
497 /* find delimiter between host and sharename */
498 pos = strpbrk(devname + 2, delims);
502 /* record the server hostname */
503 kfree(ctx->server_hostname);
504 ctx->server_hostname = kstrndup(devname + 2, pos - devname - 2, GFP_KERNEL);
505 if (!ctx->server_hostname)
508 /* skip past delimiter */
511 /* now go until next delimiter or end of string */
512 len = strcspn(pos, delims);
514 /* move "pos" up to delimiter or NULL */
517 ctx->UNC = kstrndup(devname, pos - devname, GFP_KERNEL);
521 convert_delimiter(ctx->UNC, '\\');
523 /* skip any delimiter */
524 if (*pos == '/' || *pos == '\\')
530 /* If pos is NULL then no prepath */
534 ctx->prepath = sanitize_path(pos);
541 static void smb3_fs_context_free(struct fs_context *fc);
542 static int smb3_fs_context_parse_param(struct fs_context *fc,
543 struct fs_parameter *param);
544 static int smb3_fs_context_parse_monolithic(struct fs_context *fc,
546 static int smb3_get_tree(struct fs_context *fc);
547 static int smb3_reconfigure(struct fs_context *fc);
549 static const struct fs_context_operations smb3_fs_context_ops = {
550 .free = smb3_fs_context_free,
551 .parse_param = smb3_fs_context_parse_param,
552 .parse_monolithic = smb3_fs_context_parse_monolithic,
553 .get_tree = smb3_get_tree,
554 .reconfigure = smb3_reconfigure,
558 * Parse a monolithic block of data from sys_mount().
559 * smb3_fs_context_parse_monolithic - Parse key[=val][,key[=val]]* mount data
560 * @ctx: The superblock configuration to fill in.
561 * @data: The data to parse
563 * Parse a blob of data that's in key[=val][,key[=val]]* form. This can be
564 * called from the ->monolithic_mount_data() fs_context operation.
566 * Returns 0 on success or the error returned by the ->parse_option() fs_context
567 * operation on failure.
569 static int smb3_fs_context_parse_monolithic(struct fs_context *fc,
572 struct smb3_fs_context *ctx = smb3_fc2context(fc);
573 char *options = data, *key;
579 ctx->mount_options = kstrdup(data, GFP_KERNEL);
580 if (ctx->mount_options == NULL)
583 ret = security_sb_eat_lsm_opts(options, &fc->security);
587 /* BB Need to add support for sep= here TBD */
588 while ((key = strsep(&options, ",")) != NULL) {
595 /* Check if following character is the deliminator If yes,
596 * we have encountered a double deliminator reset the NULL
597 * character to the deliminator
599 while (options && options[0] == ',') {
601 strcpy(key + len, options);
602 options = strchr(options, ',');
609 value = strchr(key, '=');
617 ret = vfs_parse_fs_string(fc, key, value, len);
626 * Validate the preparsed information in the config.
628 static int smb3_fs_context_validate(struct fs_context *fc)
630 struct smb3_fs_context *ctx = smb3_fc2context(fc);
632 if (ctx->rdma && ctx->vals->protocol_id < SMB30_PROT_ID) {
633 cifs_errorf(fc, "SMB Direct requires Version >=3.0\n");
638 /* Muliuser mounts require CONFIG_KEYS support */
639 if (ctx->multiuser) {
640 cifs_errorf(fc, "Multiuser mounts require kernels with CONFIG_KEYS enabled\n");
645 if (ctx->got_version == false)
646 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");
650 cifs_errorf(fc, "CIFS mount error: No usable UNC path provided in device string!\n");
654 /* make sure UNC has a share name */
655 if (strlen(ctx->UNC) < 3 || !strchr(ctx->UNC + 3, '\\')) {
656 cifs_errorf(fc, "Malformed UNC. Unable to find share name.\n");
664 /* No ip= option specified? Try to get it from UNC */
665 /* Use the address part of the UNC. */
666 slash = strchr(&ctx->UNC[2], '\\');
667 len = slash - &ctx->UNC[2];
668 if (!cifs_convert_address((struct sockaddr *)&ctx->dstaddr,
669 &ctx->UNC[2], len)) {
670 pr_err("Unable to determine destination address\n");
671 return -EHOSTUNREACH;
675 /* set the port that we got earlier */
676 cifs_set_port((struct sockaddr *)&ctx->dstaddr, ctx->port);
678 if (ctx->override_uid && !ctx->uid_specified) {
679 ctx->override_uid = 0;
680 pr_notice("ignoring forceuid mount option specified with no uid= option\n");
683 if (ctx->override_gid && !ctx->gid_specified) {
684 ctx->override_gid = 0;
685 pr_notice("ignoring forcegid mount option specified with no gid= option\n");
691 static int smb3_get_tree_common(struct fs_context *fc)
693 struct smb3_fs_context *ctx = smb3_fc2context(fc);
697 root = cifs_smb3_do_mount(fc->fs_type, 0, ctx);
699 return PTR_ERR(root);
707 * Create an SMB3 superblock from the parameters passed.
709 static int smb3_get_tree(struct fs_context *fc)
711 int err = smb3_fs_context_validate(fc);
716 mutex_lock(&cifs_mount_mutex);
717 ret = smb3_get_tree_common(fc);
718 mutex_unlock(&cifs_mount_mutex);
722 static void smb3_fs_context_free(struct fs_context *fc)
724 struct smb3_fs_context *ctx = smb3_fc2context(fc);
726 smb3_cleanup_fs_context(ctx);
730 * Compare the old and new proposed context during reconfigure
731 * and check if the changes are compatible.
733 static int smb3_verify_reconfigure_ctx(struct fs_context *fc,
734 struct smb3_fs_context *new_ctx,
735 struct smb3_fs_context *old_ctx)
737 if (new_ctx->posix_paths != old_ctx->posix_paths) {
738 cifs_errorf(fc, "can not change posixpaths during remount\n");
741 if (new_ctx->sectype != old_ctx->sectype) {
742 cifs_errorf(fc, "can not change sec during remount\n");
745 if (new_ctx->multiuser != old_ctx->multiuser) {
746 cifs_errorf(fc, "can not change multiuser during remount\n");
750 (!old_ctx->UNC || strcmp(new_ctx->UNC, old_ctx->UNC))) {
751 cifs_errorf(fc, "can not change UNC during remount\n");
754 if (new_ctx->username &&
755 (!old_ctx->username || strcmp(new_ctx->username, old_ctx->username))) {
756 cifs_errorf(fc, "can not change username during remount\n");
759 if (new_ctx->password &&
760 (!old_ctx->password || strcmp(new_ctx->password, old_ctx->password))) {
761 cifs_errorf(fc, "can not change password during remount\n");
764 if (new_ctx->domainname &&
765 (!old_ctx->domainname || strcmp(new_ctx->domainname, old_ctx->domainname))) {
766 cifs_errorf(fc, "can not change domainname during remount\n");
769 if (strcmp(new_ctx->workstation_name, old_ctx->workstation_name)) {
770 cifs_errorf(fc, "can not change workstation_name during remount\n");
773 if (new_ctx->nodename &&
774 (!old_ctx->nodename || strcmp(new_ctx->nodename, old_ctx->nodename))) {
775 cifs_errorf(fc, "can not change nodename during remount\n");
778 if (new_ctx->iocharset &&
779 (!old_ctx->iocharset || strcmp(new_ctx->iocharset, old_ctx->iocharset))) {
780 cifs_errorf(fc, "can not change iocharset during remount\n");
787 #define STEAL_STRING(cifs_sb, ctx, field) \
790 ctx->field = cifs_sb->ctx->field; \
791 cifs_sb->ctx->field = NULL; \
794 static int smb3_reconfigure(struct fs_context *fc)
796 struct smb3_fs_context *ctx = smb3_fc2context(fc);
797 struct dentry *root = fc->root;
798 struct cifs_sb_info *cifs_sb = CIFS_SB(root->d_sb);
801 rc = smb3_verify_reconfigure_ctx(fc, ctx, cifs_sb->ctx);
806 * We can not change UNC/username/password/domainname/
807 * workstation_name/nodename/iocharset
808 * during reconnect so ignore what we have in the new context and
809 * just use what we already have in cifs_sb->ctx.
811 STEAL_STRING(cifs_sb, ctx, UNC);
812 STEAL_STRING(cifs_sb, ctx, source);
813 STEAL_STRING(cifs_sb, ctx, username);
814 STEAL_STRING(cifs_sb, ctx, password);
815 STEAL_STRING(cifs_sb, ctx, domainname);
816 STEAL_STRING(cifs_sb, ctx, nodename);
817 STEAL_STRING(cifs_sb, ctx, iocharset);
819 /* if rsize or wsize not passed in on remount, use previous values */
821 ctx->rsize = cifs_sb->ctx->rsize;
823 ctx->wsize = cifs_sb->ctx->wsize;
826 smb3_cleanup_fs_context_contents(cifs_sb->ctx);
827 rc = smb3_fs_context_dup(cifs_sb->ctx, ctx);
828 smb3_update_mnt_flags(cifs_sb);
829 #ifdef CONFIG_CIFS_DFS_UPCALL
831 rc = dfs_cache_remount_fs(cifs_sb);
837 static int smb3_fs_context_parse_param(struct fs_context *fc,
838 struct fs_parameter *param)
840 struct fs_parse_result result;
841 struct smb3_fs_context *ctx = smb3_fc2context(fc);
843 bool is_smb3 = !strcmp(fc->fs_type->name, "smb3");
844 bool skip_parsing = false;
848 cifs_dbg(FYI, "CIFS: parsing cifs mount option '%s'\n", param->key);
851 * fs_parse can not handle string options with an empty value so
852 * we will need special handling of them.
854 if (param->type == fs_value_is_string && param->string[0] == 0) {
855 if (!strcmp("pass", param->key) || !strcmp("password", param->key)) {
858 } else if (!strcmp("user", param->key) || !strcmp("username", param->key)) {
865 opt = fs_parse(fc, smb3_fs_parameters, param, &result);
867 return ctx->sloppy ? 1 : opt;
872 ctx->compression = UNKNOWN_TYPE;
874 "SMB3 compression support is experimental\n");
896 ctx->sfu_remap = false; /* disable SFU mapping */
907 ctx->override_uid = 0;
909 ctx->override_uid = 1;
913 ctx->override_gid = 0;
915 ctx->override_gid = 1;
935 case Opt_noblocksend:
950 case Opt_multichannel:
951 if (result.negated) {
952 ctx->multichannel = false;
953 ctx->max_channels = 1;
955 ctx->multichannel = true;
956 /* if number of channels not specified, default to 2 */
957 if (ctx->max_channels < 2)
958 ctx->max_channels = 2;
962 uid = make_kuid(current_user_ns(), result.uint_32);
964 goto cifs_parse_mount_err;
965 ctx->linux_uid = uid;
966 ctx->uid_specified = true;
969 uid = make_kuid(current_user_ns(), result.uint_32);
971 goto cifs_parse_mount_err;
973 ctx->cruid_specified = true;
976 uid = make_kuid(current_user_ns(), result.uint_32);
978 goto cifs_parse_mount_err;
979 ctx->backupuid = uid;
980 ctx->backupuid_specified = true;
983 gid = make_kgid(current_user_ns(), result.uint_32);
985 goto cifs_parse_mount_err;
986 ctx->backupgid = gid;
987 ctx->backupgid_specified = true;
990 gid = make_kgid(current_user_ns(), result.uint_32);
992 goto cifs_parse_mount_err;
993 ctx->linux_gid = gid;
994 ctx->gid_specified = true;
997 ctx->port = result.uint_32;
1000 ctx->file_mode = result.uint_32;
1003 ctx->dir_mode = result.uint_32;
1005 case Opt_min_enc_offload:
1006 ctx->min_offload = result.uint_32;
1010 * inode blocksize realistically should never need to be
1011 * less than 16K or greater than 16M and default is 1MB.
1012 * Note that small inode block sizes (e.g. 64K) can lead
1013 * to very poor performance of common tools like cp and scp
1015 if ((result.uint_32 < CIFS_MAX_MSGSIZE) ||
1016 (result.uint_32 > (4 * SMB3_DEFAULT_IOSIZE))) {
1017 cifs_errorf(fc, "%s: Invalid blocksize\n",
1019 goto cifs_parse_mount_err;
1021 ctx->bsize = result.uint_32;
1022 ctx->got_bsize = true;
1026 * readahead size realistically should never need to be
1027 * less than 1M (CIFS_DEFAULT_IOSIZE) or greater than 32M
1028 * (perhaps an exception should be considered in the
1029 * for the case of a large number of channels
1030 * when multichannel is negotiated) since that would lead
1031 * to plenty of parallel I/O in flight to the server.
1032 * Note that smaller read ahead sizes would
1033 * hurt performance of common tools like cp and scp
1034 * which often trigger sequential i/o with read ahead
1036 if ((result.uint_32 > (8 * SMB3_DEFAULT_IOSIZE)) ||
1037 (result.uint_32 < CIFS_DEFAULT_IOSIZE)) {
1038 cifs_errorf(fc, "%s: Invalid rasize %d vs. %d\n",
1039 __func__, result.uint_32, SMB3_DEFAULT_IOSIZE);
1040 goto cifs_parse_mount_err;
1042 ctx->rasize = result.uint_32;
1045 ctx->rsize = result.uint_32;
1046 ctx->got_rsize = true;
1049 ctx->wsize = result.uint_32;
1050 ctx->got_wsize = true;
1053 ctx->acregmax = HZ * result.uint_32;
1054 if (ctx->acregmax > CIFS_MAX_ACTIMEO) {
1055 cifs_errorf(fc, "acregmax too large\n");
1056 goto cifs_parse_mount_err;
1060 ctx->acdirmax = HZ * result.uint_32;
1061 if (ctx->acdirmax > CIFS_MAX_ACTIMEO) {
1062 cifs_errorf(fc, "acdirmax too large\n");
1063 goto cifs_parse_mount_err;
1067 if (HZ * result.uint_32 > CIFS_MAX_ACTIMEO) {
1068 cifs_errorf(fc, "timeout too large\n");
1069 goto cifs_parse_mount_err;
1071 if ((ctx->acdirmax != CIFS_DEF_ACTIMEO) ||
1072 (ctx->acregmax != CIFS_DEF_ACTIMEO)) {
1073 cifs_errorf(fc, "actimeo ignored since acregmax or acdirmax specified\n");
1076 ctx->acdirmax = ctx->acregmax = HZ * result.uint_32;
1078 case Opt_closetimeo:
1079 ctx->closetimeo = HZ * result.uint_32;
1080 if (ctx->closetimeo > SMB3_MAX_DCLOSETIMEO) {
1081 cifs_errorf(fc, "closetimeo too large\n");
1082 goto cifs_parse_mount_err;
1085 case Opt_echo_interval:
1086 ctx->echo_interval = result.uint_32;
1089 ctx->snapshot_time = result.uint_64;
1091 case Opt_max_credits:
1092 if (result.uint_32 < 20 || result.uint_32 > 60000) {
1093 cifs_errorf(fc, "%s: Invalid max_credits value\n",
1095 goto cifs_parse_mount_err;
1097 ctx->max_credits = result.uint_32;
1099 case Opt_max_channels:
1100 if (result.uint_32 < 1 || result.uint_32 > CIFS_MAX_CHANNELS) {
1101 cifs_errorf(fc, "%s: Invalid max_channels value, needs to be 1-%d\n",
1102 __func__, CIFS_MAX_CHANNELS);
1103 goto cifs_parse_mount_err;
1105 ctx->max_channels = result.uint_32;
1106 /* If more than one channel requested ... they want multichan */
1107 if (result.uint_32 > 1)
1108 ctx->multichannel = true;
1110 case Opt_handletimeout:
1111 ctx->handle_timeout = result.uint_32;
1112 if (ctx->handle_timeout > SMB3_MAX_HANDLE_TIMEOUT) {
1113 cifs_errorf(fc, "Invalid handle cache timeout, longer than 16 minutes\n");
1114 goto cifs_parse_mount_err;
1120 switch (smb3_parse_devname(param->string, ctx)) {
1124 cifs_errorf(fc, "Unable to allocate memory for devname\n");
1125 goto cifs_parse_mount_err;
1127 cifs_errorf(fc, "Malformed UNC in devname\n");
1128 goto cifs_parse_mount_err;
1130 cifs_errorf(fc, "Unknown error parsing devname\n");
1131 goto cifs_parse_mount_err;
1133 ctx->source = kstrdup(param->string, GFP_KERNEL);
1134 if (ctx->source == NULL) {
1135 cifs_errorf(fc, "OOM when copying UNC string\n");
1136 goto cifs_parse_mount_err;
1138 fc->source = kstrdup(param->string, GFP_KERNEL);
1139 if (fc->source == NULL) {
1140 cifs_errorf(fc, "OOM when copying UNC string\n");
1141 goto cifs_parse_mount_err;
1145 kfree(ctx->username);
1146 ctx->username = NULL;
1147 if (strlen(param->string) == 0) {
1148 /* null user, ie. anonymous authentication */
1153 if (strnlen(param->string, CIFS_MAX_USERNAME_LEN) >
1154 CIFS_MAX_USERNAME_LEN) {
1155 pr_warn("username too long\n");
1156 goto cifs_parse_mount_err;
1158 ctx->username = kstrdup(param->string, GFP_KERNEL);
1159 if (ctx->username == NULL) {
1160 cifs_errorf(fc, "OOM when copying username string\n");
1161 goto cifs_parse_mount_err;
1165 kfree(ctx->password);
1166 ctx->password = NULL;
1167 if (strlen(param->string) == 0)
1170 ctx->password = kstrdup(param->string, GFP_KERNEL);
1171 if (ctx->password == NULL) {
1172 cifs_errorf(fc, "OOM when copying password string\n");
1173 goto cifs_parse_mount_err;
1177 if (strlen(param->string) == 0) {
1178 ctx->got_ip = false;
1181 if (!cifs_convert_address((struct sockaddr *)&ctx->dstaddr,
1183 strlen(param->string))) {
1184 pr_err("bad ip= option (%s)\n", param->string);
1185 goto cifs_parse_mount_err;
1190 if (strnlen(param->string, CIFS_MAX_DOMAINNAME_LEN)
1191 == CIFS_MAX_DOMAINNAME_LEN) {
1192 pr_warn("domain name too long\n");
1193 goto cifs_parse_mount_err;
1196 kfree(ctx->domainname);
1197 ctx->domainname = kstrdup(param->string, GFP_KERNEL);
1198 if (ctx->domainname == NULL) {
1199 cifs_errorf(fc, "OOM when copying domainname string\n");
1200 goto cifs_parse_mount_err;
1202 cifs_dbg(FYI, "Domain name set\n");
1205 if (!cifs_convert_address(
1206 (struct sockaddr *)&ctx->srcaddr,
1207 param->string, strlen(param->string))) {
1208 pr_warn("Could not parse srcaddr: %s\n",
1210 goto cifs_parse_mount_err;
1214 if (strnlen(param->string, 1024) >= 65) {
1215 pr_warn("iocharset name too long\n");
1216 goto cifs_parse_mount_err;
1219 if (strncasecmp(param->string, "default", 7) != 0) {
1220 kfree(ctx->iocharset);
1221 ctx->iocharset = kstrdup(param->string, GFP_KERNEL);
1222 if (ctx->iocharset == NULL) {
1223 cifs_errorf(fc, "OOM when copying iocharset string\n");
1224 goto cifs_parse_mount_err;
1227 /* if iocharset not set then load_nls_default
1230 cifs_dbg(FYI, "iocharset set to %s\n", ctx->iocharset);
1232 case Opt_netbiosname:
1233 memset(ctx->source_rfc1001_name, 0x20,
1236 * FIXME: are there cases in which a comma can
1237 * be valid in workstation netbios name (and
1238 * need special handling)?
1240 for (i = 0; i < RFC1001_NAME_LEN; i++) {
1241 /* don't ucase netbiosname for user */
1242 if (param->string[i] == 0)
1244 ctx->source_rfc1001_name[i] = param->string[i];
1246 /* The string has 16th byte zero still from
1247 * set at top of the function
1249 if (i == RFC1001_NAME_LEN && param->string[i] != 0)
1250 pr_warn("netbiosname longer than 15 truncated\n");
1253 /* last byte, type, is 0x20 for servr type */
1254 memset(ctx->target_rfc1001_name, 0x20,
1255 RFC1001_NAME_LEN_WITH_NULL);
1257 * BB are there cases in which a comma can be valid in this
1258 * workstation netbios name (and need special handling)?
1261 /* user or mount helper must uppercase the netbios name */
1262 for (i = 0; i < 15; i++) {
1263 if (param->string[i] == 0)
1265 ctx->target_rfc1001_name[i] = param->string[i];
1268 /* The string has 16th byte zero still from set at top of function */
1269 if (i == RFC1001_NAME_LEN && param->string[i] != 0)
1270 pr_warn("server netbiosname longer than 15 truncated\n");
1273 /* version of mount userspace tools, not dialect */
1274 /* If interface changes in mount.cifs bump to new ver */
1275 if (strncasecmp(param->string, "1", 1) == 0) {
1276 if (strlen(param->string) > 1) {
1277 pr_warn("Bad mount helper ver=%s. Did you want SMB1 (CIFS) dialect and mean to type vers=1.0 instead?\n",
1279 goto cifs_parse_mount_err;
1281 /* This is the default */
1284 /* For all other value, error */
1285 pr_warn("Invalid mount helper version specified\n");
1286 goto cifs_parse_mount_err;
1288 /* protocol version (dialect) */
1289 if (cifs_parse_smb_version(fc, param->string, ctx, is_smb3) != 0)
1290 goto cifs_parse_mount_err;
1291 ctx->got_version = true;
1294 if (cifs_parse_security_flavors(fc, param->string, ctx) != 0)
1295 goto cifs_parse_mount_err;
1298 if (cifs_parse_cache_flavor(fc, param->string, ctx) != 0)
1299 goto cifs_parse_mount_err;
1302 #ifndef CONFIG_CIFS_SWN_UPCALL
1303 cifs_errorf(fc, "Witness support needs CONFIG_CIFS_SWN_UPCALL config option\n");
1304 goto cifs_parse_mount_err;
1306 ctx->witness = true;
1307 pr_warn_once("Witness protocol support is experimental\n");
1310 #ifndef CONFIG_CIFS_ROOT
1311 cifs_dbg(VFS, "rootfs support requires CONFIG_CIFS_ROOT config option\n");
1312 goto cifs_parse_mount_err;
1316 case Opt_posixpaths:
1318 ctx->posix_paths = 0;
1320 ctx->posix_paths = 1;
1323 if (result.negated) {
1324 if (ctx->linux_ext == 1)
1325 pr_warn_once("conflicting posix mount options specified\n");
1327 ctx->no_linux_ext = 1;
1329 if (ctx->no_linux_ext == 1)
1330 pr_warn_once("conflicting posix mount options specified\n");
1332 ctx->no_linux_ext = 0;
1339 if (result.negated) {
1341 * turn off mandatory locking in mode
1342 * if remote locking is turned off since the
1343 * local vfs will do advisory
1345 if (ctx->file_mode ==
1346 (S_IALLUGO & ~(S_ISUID | S_IXGRP)))
1347 ctx->file_mode = S_IALLUGO;
1352 case Opt_handlecache:
1354 ctx->nohandlecache = 1;
1356 ctx->nohandlecache = 0;
1358 case Opt_forcemandatorylock:
1362 ctx->setuids = result.negated;
1365 ctx->intr = !result.negated;
1367 case Opt_setuidfromacl:
1368 ctx->setuidfromacl = 1;
1370 case Opt_strictsync:
1371 ctx->nostrictsync = result.negated;
1374 ctx->server_ino = !result.negated;
1376 case Opt_rwpidforward:
1377 ctx->rwpidforward = 1;
1383 ctx->cifs_acl = !result.negated;
1386 ctx->no_psx_acl = result.negated;
1388 case Opt_locallease:
1389 ctx->local_lease = 1;
1394 case Opt_ignore_signature:
1396 ctx->ignore_signature = true;
1399 /* we do not do the following in secFlags because seal
1400 * is a per tree connection (mount) not a per socket
1401 * or per-smb connection option in the protocol
1402 * vol->secFlg |= CIFSSEC_MUST_SEAL;
1407 pr_warn("Mount option noac not supported. Instead set /proc/fs/cifs/LookupCacheEnabled to 0\n");
1410 #ifndef CONFIG_CIFS_FSCACHE
1411 cifs_errorf(fc, "FS-Cache support needs CONFIG_CIFS_FSCACHE kernel config option set\n");
1412 goto cifs_parse_mount_err;
1416 case Opt_mfsymlinks:
1417 ctx->mfsymlinks = true;
1420 ctx->multiuser = true;
1425 case Opt_nosharesock:
1426 ctx->nosharesock = true;
1428 case Opt_persistent:
1429 if (result.negated) {
1430 ctx->nopersistent = true;
1431 if (ctx->persistent) {
1432 cifs_errorf(fc, "persistenthandles mount options conflict\n");
1433 goto cifs_parse_mount_err;
1436 ctx->persistent = true;
1437 if ((ctx->nopersistent) || (ctx->resilient)) {
1438 cifs_errorf(fc, "persistenthandles mount options conflict\n");
1439 goto cifs_parse_mount_err;
1444 if (result.negated) {
1445 ctx->resilient = false; /* already the default */
1447 ctx->resilient = true;
1448 if (ctx->persistent) {
1449 cifs_errorf(fc, "persistenthandles mount options conflict\n");
1450 goto cifs_parse_mount_err;
1454 case Opt_tcp_nodelay:
1455 /* tcp nodelay should not usually be needed since we CORK/UNCORK the socket */
1457 ctx->sockopt_tcp_nodelay = false;
1459 ctx->sockopt_tcp_nodelay = true;
1461 case Opt_domainauto:
1462 ctx->domainauto = true;
1468 /* case Opt_ignore: - is ignored as expected ... */
1472 cifs_parse_mount_err:
1476 int smb3_init_fs_context(struct fs_context *fc)
1478 struct smb3_fs_context *ctx;
1479 char *nodename = utsname()->nodename;
1482 ctx = kzalloc(sizeof(struct smb3_fs_context), GFP_KERNEL);
1486 strscpy(ctx->workstation_name, nodename, sizeof(ctx->workstation_name));
1489 * does not have to be perfect mapping since field is
1490 * informational, only used for servers that do not support
1491 * port 445 and it can be overridden at mount time
1493 memset(ctx->source_rfc1001_name, 0x20, RFC1001_NAME_LEN);
1494 for (i = 0; i < strnlen(nodename, RFC1001_NAME_LEN); i++)
1495 ctx->source_rfc1001_name[i] = toupper(nodename[i]);
1497 ctx->source_rfc1001_name[RFC1001_NAME_LEN] = 0;
1499 * null target name indicates to use *SMBSERVR default called name
1500 * if we end up sending RFC1001 session initialize
1502 ctx->target_rfc1001_name[0] = 0;
1503 ctx->cred_uid = current_uid();
1504 ctx->linux_uid = current_uid();
1505 ctx->linux_gid = current_gid();
1506 /* By default 4MB read ahead size, 1MB block size */
1507 ctx->bsize = CIFS_DEFAULT_IOSIZE; /* can improve cp performance significantly */
1508 ctx->rasize = 0; /* 0 = use default (ie negotiated rsize) for read ahead pages */
1511 * default to SFM style remapping of seven reserved characters
1512 * unless user overrides it or we negotiate CIFS POSIX where
1513 * it is unnecessary. Can not simultaneously use more than one mapping
1514 * since then readdir could list files that open could not open
1518 /* default to only allowing write access to owner of the mount */
1519 ctx->dir_mode = ctx->file_mode = S_IRUGO | S_IXUGO | S_IWUSR;
1521 /* ctx->retry default is 0 (i.e. "soft" limited retry not hard retry) */
1522 /* default is always to request posix paths. */
1523 ctx->posix_paths = 1;
1524 /* default to using server inode numbers where available */
1525 ctx->server_ino = 1;
1527 /* default is to use strict cifs caching semantics */
1528 ctx->strict_io = true;
1530 ctx->acregmax = CIFS_DEF_ACTIMEO;
1531 ctx->acdirmax = CIFS_DEF_ACTIMEO;
1532 ctx->closetimeo = SMB3_DEF_DCLOSETIMEO;
1534 /* Most clients set timeout to 0, allows server to use its default */
1535 ctx->handle_timeout = 0; /* See MS-SMB2 spec section 2.2.14.2.12 */
1537 /* offer SMB2.1 and later (SMB3 etc). Secure and widely accepted */
1538 ctx->ops = &smb30_operations;
1539 ctx->vals = &smbdefault_values;
1541 ctx->echo_interval = SMB_ECHO_INTERVAL_DEFAULT;
1543 /* default to no multichannel (single server connection) */
1544 ctx->multichannel = false;
1545 ctx->max_channels = 1;
1547 ctx->backupuid_specified = false; /* no backup intent for a user */
1548 ctx->backupgid_specified = false; /* no backup intent for a group */
1551 * short int override_uid = -1;
1552 * short int override_gid = -1;
1553 * char *nodename = strdup(utsname()->nodename);
1554 * struct sockaddr *dstaddr = (struct sockaddr *)&vol->dstaddr;
1557 fc->fs_private = ctx;
1558 fc->ops = &smb3_fs_context_ops;
1563 smb3_cleanup_fs_context_contents(struct smb3_fs_context *ctx)
1569 * Make sure this stays in sync with smb3_fs_context_dup()
1571 kfree(ctx->mount_options);
1572 ctx->mount_options = NULL;
1573 kfree(ctx->username);
1574 ctx->username = NULL;
1575 kfree_sensitive(ctx->password);
1576 ctx->password = NULL;
1577 kfree(ctx->server_hostname);
1578 ctx->server_hostname = NULL;
1583 kfree(ctx->domainname);
1584 ctx->domainname = NULL;
1585 kfree(ctx->nodename);
1586 ctx->nodename = NULL;
1587 kfree(ctx->iocharset);
1588 ctx->iocharset = NULL;
1589 kfree(ctx->prepath);
1590 ctx->prepath = NULL;
1594 smb3_cleanup_fs_context(struct smb3_fs_context *ctx)
1598 smb3_cleanup_fs_context_contents(ctx);
1602 void smb3_update_mnt_flags(struct cifs_sb_info *cifs_sb)
1604 struct smb3_fs_context *ctx = cifs_sb->ctx;
1607 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_DFS;
1609 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_NO_DFS;
1612 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM;
1614 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_NO_PERM;
1617 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID;
1619 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SET_UID;
1621 if (ctx->setuidfromacl)
1622 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UID_FROM_ACL;
1624 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_UID_FROM_ACL;
1626 if (ctx->server_ino)
1627 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM;
1629 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SERVER_INUM;
1632 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SFM_CHR;
1634 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_MAP_SFM_CHR;
1637 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR;
1639 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_MAP_SPECIAL_CHR;
1642 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR;
1644 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_NO_XATTR;
1647 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL;
1649 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_UNX_EMUL;
1652 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL;
1654 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_NO_BRL;
1656 if (ctx->nohandlecache)
1657 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_HANDLE_CACHE;
1659 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_NO_HANDLE_CACHE;
1661 if (ctx->nostrictsync)
1662 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOSSYNC;
1664 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_NOSSYNC;
1667 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOPOSIXBRL;
1669 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_NOPOSIXBRL;
1671 if (ctx->rwpidforward)
1672 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_RWPIDFORWARD;
1674 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_RWPIDFORWARD;
1677 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MODE_FROM_SID;
1679 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_MODE_FROM_SID;
1682 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL;
1684 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_CIFS_ACL;
1686 if (ctx->backupuid_specified)
1687 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPUID;
1689 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_CIFS_BACKUPUID;
1691 if (ctx->backupgid_specified)
1692 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPGID;
1694 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_CIFS_BACKUPGID;
1696 if (ctx->override_uid)
1697 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID;
1699 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_OVERR_UID;
1701 if (ctx->override_gid)
1702 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID;
1704 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_OVERR_GID;
1707 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM;
1709 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_DYNPERM;
1712 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_FSCACHE;
1714 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_FSCACHE;
1717 cifs_sb->mnt_cifs_flags |= (CIFS_MOUNT_MULTIUSER |
1718 CIFS_MOUNT_NO_PERM);
1720 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_MULTIUSER;
1724 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_STRICT_IO;
1726 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_STRICT_IO;
1729 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO;
1731 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_DIRECT_IO;
1733 if (ctx->mfsymlinks)
1734 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MF_SYMLINKS;
1736 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_MF_SYMLINKS;
1737 if (ctx->mfsymlinks) {
1738 if (ctx->sfu_emul) {
1740 * Our SFU ("Services for Unix" emulation does not allow
1741 * creating symlinks but does allow reading existing SFU
1742 * symlinks (it does allow both creating and reading SFU
1743 * style mknod and FIFOs though). When "mfsymlinks" and
1744 * "sfu" are both enabled at the same time, it allows
1745 * reading both types of symlinks, but will only create
1746 * them with mfsymlinks format. This allows better
1747 * Apple compatibility (probably better for Samba too)
1748 * while still recognizing old Windows style symlinks.
1750 cifs_dbg(VFS, "mount options mfsymlinks and sfu both enabled\n");
1753 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SHUTDOWN;