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("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. @gfp indicates the GFP_* flags
446 * The caller is responsible for freeing the original.
448 #define IS_DELIM(c) ((c) == '/' || (c) == '\\')
449 char *cifs_sanitize_prepath(char *prepath, gfp_t gfp)
451 char *cursor1 = prepath, *cursor2 = prepath;
453 /* skip all prepended delimiters */
454 while (IS_DELIM(*cursor1))
457 /* copy the first letter */
460 /* copy the remainder... */
461 while (*(cursor1++)) {
462 /* ... skipping all duplicated delimiters */
463 if (IS_DELIM(*cursor1) && IS_DELIM(*cursor2))
465 *(++cursor2) = *cursor1;
468 /* if the last character is a delimiter, skip it */
469 if (IS_DELIM(*(cursor2 - 1)))
473 return kstrdup(prepath, gfp);
477 * Parse a devname into substrings and populate the ctx->UNC and ctx->prepath
478 * fields with the result. Returns 0 on success and an error otherwise
479 * (e.g. ENOMEM or EINVAL)
482 smb3_parse_devname(const char *devname, struct smb3_fs_context *ctx)
485 const char *delims = "/\\";
488 if (unlikely(!devname || !*devname)) {
489 cifs_dbg(VFS, "Device name not specified\n");
493 /* make sure we have a valid UNC double delimiter prefix */
494 len = strspn(devname, delims);
498 /* find delimiter between host and sharename */
499 pos = strpbrk(devname + 2, delims);
503 /* record the server hostname */
504 kfree(ctx->server_hostname);
505 ctx->server_hostname = kstrndup(devname + 2, pos - devname - 2, GFP_KERNEL);
506 if (!ctx->server_hostname)
509 /* skip past delimiter */
512 /* now go until next delimiter or end of string */
513 len = strcspn(pos, delims);
515 /* move "pos" up to delimiter or NULL */
518 ctx->UNC = kstrndup(devname, pos - devname, GFP_KERNEL);
522 convert_delimiter(ctx->UNC, '\\');
524 /* skip any delimiter */
525 if (*pos == '/' || *pos == '\\')
531 /* If pos is NULL then no prepath */
535 ctx->prepath = cifs_sanitize_prepath(pos, GFP_KERNEL);
542 static void smb3_fs_context_free(struct fs_context *fc);
543 static int smb3_fs_context_parse_param(struct fs_context *fc,
544 struct fs_parameter *param);
545 static int smb3_fs_context_parse_monolithic(struct fs_context *fc,
547 static int smb3_get_tree(struct fs_context *fc);
548 static int smb3_reconfigure(struct fs_context *fc);
550 static const struct fs_context_operations smb3_fs_context_ops = {
551 .free = smb3_fs_context_free,
552 .parse_param = smb3_fs_context_parse_param,
553 .parse_monolithic = smb3_fs_context_parse_monolithic,
554 .get_tree = smb3_get_tree,
555 .reconfigure = smb3_reconfigure,
559 * Parse a monolithic block of data from sys_mount().
560 * smb3_fs_context_parse_monolithic - Parse key[=val][,key[=val]]* mount data
561 * @ctx: The superblock configuration to fill in.
562 * @data: The data to parse
564 * Parse a blob of data that's in key[=val][,key[=val]]* form. This can be
565 * called from the ->monolithic_mount_data() fs_context operation.
567 * Returns 0 on success or the error returned by the ->parse_option() fs_context
568 * operation on failure.
570 static int smb3_fs_context_parse_monolithic(struct fs_context *fc,
573 struct smb3_fs_context *ctx = smb3_fc2context(fc);
574 char *options = data, *key;
580 ctx->mount_options = kstrdup(data, GFP_KERNEL);
581 if (ctx->mount_options == NULL)
584 ret = security_sb_eat_lsm_opts(options, &fc->security);
588 /* BB Need to add support for sep= here TBD */
589 while ((key = strsep(&options, ",")) != NULL) {
596 /* Check if following character is the deliminator If yes,
597 * we have encountered a double deliminator reset the NULL
598 * character to the deliminator
600 while (options && options[0] == ',') {
602 strcpy(key + len, options);
603 options = strchr(options, ',');
610 value = strchr(key, '=');
618 ret = vfs_parse_fs_string(fc, key, value, len);
627 * Validate the preparsed information in the config.
629 static int smb3_fs_context_validate(struct fs_context *fc)
631 struct smb3_fs_context *ctx = smb3_fc2context(fc);
633 if (ctx->rdma && ctx->vals->protocol_id < SMB30_PROT_ID) {
634 cifs_errorf(fc, "SMB Direct requires Version >=3.0\n");
639 /* Muliuser mounts require CONFIG_KEYS support */
640 if (ctx->multiuser) {
641 cifs_errorf(fc, "Multiuser mounts require kernels with CONFIG_KEYS enabled\n");
646 if (ctx->got_version == false)
647 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");
651 cifs_errorf(fc, "CIFS mount error: No usable UNC path provided in device string!\n");
655 /* make sure UNC has a share name */
656 if (strlen(ctx->UNC) < 3 || !strchr(ctx->UNC + 3, '\\')) {
657 cifs_errorf(fc, "Malformed UNC. Unable to find share name.\n");
665 /* No ip= option specified? Try to get it from UNC */
666 /* Use the address part of the UNC. */
667 slash = strchr(&ctx->UNC[2], '\\');
668 len = slash - &ctx->UNC[2];
669 if (!cifs_convert_address((struct sockaddr *)&ctx->dstaddr,
670 &ctx->UNC[2], len)) {
671 pr_err("Unable to determine destination address\n");
672 return -EHOSTUNREACH;
676 /* set the port that we got earlier */
677 cifs_set_port((struct sockaddr *)&ctx->dstaddr, ctx->port);
679 if (ctx->override_uid && !ctx->uid_specified) {
680 ctx->override_uid = 0;
681 pr_notice("ignoring forceuid mount option specified with no uid= option\n");
684 if (ctx->override_gid && !ctx->gid_specified) {
685 ctx->override_gid = 0;
686 pr_notice("ignoring forcegid mount option specified with no gid= option\n");
692 static int smb3_get_tree_common(struct fs_context *fc)
694 struct smb3_fs_context *ctx = smb3_fc2context(fc);
698 root = cifs_smb3_do_mount(fc->fs_type, 0, ctx);
700 return PTR_ERR(root);
708 * Create an SMB3 superblock from the parameters passed.
710 static int smb3_get_tree(struct fs_context *fc)
712 int err = smb3_fs_context_validate(fc);
717 mutex_lock(&cifs_mount_mutex);
718 ret = smb3_get_tree_common(fc);
719 mutex_unlock(&cifs_mount_mutex);
723 static void smb3_fs_context_free(struct fs_context *fc)
725 struct smb3_fs_context *ctx = smb3_fc2context(fc);
727 smb3_cleanup_fs_context(ctx);
731 * Compare the old and new proposed context during reconfigure
732 * and check if the changes are compatible.
734 static int smb3_verify_reconfigure_ctx(struct fs_context *fc,
735 struct smb3_fs_context *new_ctx,
736 struct smb3_fs_context *old_ctx)
738 if (new_ctx->posix_paths != old_ctx->posix_paths) {
739 cifs_errorf(fc, "can not change posixpaths during remount\n");
742 if (new_ctx->sectype != old_ctx->sectype) {
743 cifs_errorf(fc, "can not change sec during remount\n");
746 if (new_ctx->multiuser != old_ctx->multiuser) {
747 cifs_errorf(fc, "can not change multiuser during remount\n");
751 (!old_ctx->UNC || strcmp(new_ctx->UNC, old_ctx->UNC))) {
752 cifs_errorf(fc, "can not change UNC during remount\n");
755 if (new_ctx->username &&
756 (!old_ctx->username || strcmp(new_ctx->username, old_ctx->username))) {
757 cifs_errorf(fc, "can not change username during remount\n");
760 if (new_ctx->password &&
761 (!old_ctx->password || strcmp(new_ctx->password, old_ctx->password))) {
762 cifs_errorf(fc, "can not change password during remount\n");
765 if (new_ctx->domainname &&
766 (!old_ctx->domainname || strcmp(new_ctx->domainname, old_ctx->domainname))) {
767 cifs_errorf(fc, "can not change domainname during remount\n");
770 if (strcmp(new_ctx->workstation_name, old_ctx->workstation_name)) {
771 cifs_errorf(fc, "can not change workstation_name during remount\n");
774 if (new_ctx->nodename &&
775 (!old_ctx->nodename || strcmp(new_ctx->nodename, old_ctx->nodename))) {
776 cifs_errorf(fc, "can not change nodename during remount\n");
779 if (new_ctx->iocharset &&
780 (!old_ctx->iocharset || strcmp(new_ctx->iocharset, old_ctx->iocharset))) {
781 cifs_errorf(fc, "can not change iocharset during remount\n");
788 #define STEAL_STRING(cifs_sb, ctx, field) \
791 ctx->field = cifs_sb->ctx->field; \
792 cifs_sb->ctx->field = NULL; \
795 #define STEAL_STRING_SENSITIVE(cifs_sb, ctx, field) \
797 kfree_sensitive(ctx->field); \
798 ctx->field = cifs_sb->ctx->field; \
799 cifs_sb->ctx->field = NULL; \
802 static int smb3_reconfigure(struct fs_context *fc)
804 struct smb3_fs_context *ctx = smb3_fc2context(fc);
805 struct dentry *root = fc->root;
806 struct cifs_sb_info *cifs_sb = CIFS_SB(root->d_sb);
809 rc = smb3_verify_reconfigure_ctx(fc, ctx, cifs_sb->ctx);
814 * We can not change UNC/username/password/domainname/
815 * workstation_name/nodename/iocharset
816 * during reconnect so ignore what we have in the new context and
817 * just use what we already have in cifs_sb->ctx.
819 STEAL_STRING(cifs_sb, ctx, UNC);
820 STEAL_STRING(cifs_sb, ctx, source);
821 STEAL_STRING(cifs_sb, ctx, username);
822 STEAL_STRING_SENSITIVE(cifs_sb, ctx, password);
823 STEAL_STRING(cifs_sb, ctx, domainname);
824 STEAL_STRING(cifs_sb, ctx, nodename);
825 STEAL_STRING(cifs_sb, ctx, iocharset);
827 /* if rsize or wsize not passed in on remount, use previous values */
829 ctx->rsize = cifs_sb->ctx->rsize;
831 ctx->wsize = cifs_sb->ctx->wsize;
834 smb3_cleanup_fs_context_contents(cifs_sb->ctx);
835 rc = smb3_fs_context_dup(cifs_sb->ctx, ctx);
836 smb3_update_mnt_flags(cifs_sb);
837 #ifdef CONFIG_CIFS_DFS_UPCALL
839 rc = dfs_cache_remount_fs(cifs_sb);
845 static int smb3_fs_context_parse_param(struct fs_context *fc,
846 struct fs_parameter *param)
848 struct fs_parse_result result;
849 struct smb3_fs_context *ctx = smb3_fc2context(fc);
851 bool is_smb3 = !strcmp(fc->fs_type->name, "smb3");
852 bool skip_parsing = false;
856 cifs_dbg(FYI, "CIFS: parsing cifs mount option '%s'\n", param->key);
859 * fs_parse can not handle string options with an empty value so
860 * we will need special handling of them.
862 if (param->type == fs_value_is_string && param->string[0] == 0) {
863 if (!strcmp("pass", param->key) || !strcmp("password", param->key)) {
866 } else if (!strcmp("user", param->key) || !strcmp("username", param->key)) {
873 opt = fs_parse(fc, smb3_fs_parameters, param, &result);
875 return ctx->sloppy ? 1 : opt;
880 ctx->compression = UNKNOWN_TYPE;
882 "SMB3 compression support is experimental\n");
904 ctx->sfu_remap = false; /* disable SFU mapping */
915 ctx->override_uid = 0;
917 ctx->override_uid = 1;
921 ctx->override_gid = 0;
923 ctx->override_gid = 1;
943 case Opt_noblocksend:
958 case Opt_multichannel:
959 if (result.negated) {
960 ctx->multichannel = false;
961 ctx->max_channels = 1;
963 ctx->multichannel = true;
964 /* if number of channels not specified, default to 2 */
965 if (ctx->max_channels < 2)
966 ctx->max_channels = 2;
970 uid = make_kuid(current_user_ns(), result.uint_32);
972 goto cifs_parse_mount_err;
973 ctx->linux_uid = uid;
974 ctx->uid_specified = true;
977 uid = make_kuid(current_user_ns(), result.uint_32);
979 goto cifs_parse_mount_err;
981 ctx->cruid_specified = true;
984 uid = make_kuid(current_user_ns(), result.uint_32);
986 goto cifs_parse_mount_err;
987 ctx->backupuid = uid;
988 ctx->backupuid_specified = true;
991 gid = make_kgid(current_user_ns(), result.uint_32);
993 goto cifs_parse_mount_err;
994 ctx->backupgid = gid;
995 ctx->backupgid_specified = true;
998 gid = make_kgid(current_user_ns(), result.uint_32);
1000 goto cifs_parse_mount_err;
1001 ctx->linux_gid = gid;
1002 ctx->gid_specified = true;
1005 ctx->port = result.uint_32;
1008 ctx->file_mode = result.uint_32;
1011 ctx->dir_mode = result.uint_32;
1013 case Opt_min_enc_offload:
1014 ctx->min_offload = result.uint_32;
1018 * inode blocksize realistically should never need to be
1019 * less than 16K or greater than 16M and default is 1MB.
1020 * Note that small inode block sizes (e.g. 64K) can lead
1021 * to very poor performance of common tools like cp and scp
1023 if ((result.uint_32 < CIFS_MAX_MSGSIZE) ||
1024 (result.uint_32 > (4 * SMB3_DEFAULT_IOSIZE))) {
1025 cifs_errorf(fc, "%s: Invalid blocksize\n",
1027 goto cifs_parse_mount_err;
1029 ctx->bsize = result.uint_32;
1030 ctx->got_bsize = true;
1034 * readahead size realistically should never need to be
1035 * less than 1M (CIFS_DEFAULT_IOSIZE) or greater than 32M
1036 * (perhaps an exception should be considered in the
1037 * for the case of a large number of channels
1038 * when multichannel is negotiated) since that would lead
1039 * to plenty of parallel I/O in flight to the server.
1040 * Note that smaller read ahead sizes would
1041 * hurt performance of common tools like cp and scp
1042 * which often trigger sequential i/o with read ahead
1044 if ((result.uint_32 > (8 * SMB3_DEFAULT_IOSIZE)) ||
1045 (result.uint_32 < CIFS_DEFAULT_IOSIZE)) {
1046 cifs_errorf(fc, "%s: Invalid rasize %d vs. %d\n",
1047 __func__, result.uint_32, SMB3_DEFAULT_IOSIZE);
1048 goto cifs_parse_mount_err;
1050 ctx->rasize = result.uint_32;
1053 ctx->rsize = result.uint_32;
1054 ctx->got_rsize = true;
1057 ctx->wsize = result.uint_32;
1058 ctx->got_wsize = true;
1061 ctx->acregmax = HZ * result.uint_32;
1062 if (ctx->acregmax > CIFS_MAX_ACTIMEO) {
1063 cifs_errorf(fc, "acregmax too large\n");
1064 goto cifs_parse_mount_err;
1068 ctx->acdirmax = HZ * result.uint_32;
1069 if (ctx->acdirmax > CIFS_MAX_ACTIMEO) {
1070 cifs_errorf(fc, "acdirmax too large\n");
1071 goto cifs_parse_mount_err;
1075 if (HZ * result.uint_32 > CIFS_MAX_ACTIMEO) {
1076 cifs_errorf(fc, "timeout too large\n");
1077 goto cifs_parse_mount_err;
1079 if ((ctx->acdirmax != CIFS_DEF_ACTIMEO) ||
1080 (ctx->acregmax != CIFS_DEF_ACTIMEO)) {
1081 cifs_errorf(fc, "actimeo ignored since acregmax or acdirmax specified\n");
1084 ctx->acdirmax = ctx->acregmax = HZ * result.uint_32;
1086 case Opt_closetimeo:
1087 ctx->closetimeo = HZ * result.uint_32;
1088 if (ctx->closetimeo > SMB3_MAX_DCLOSETIMEO) {
1089 cifs_errorf(fc, "closetimeo too large\n");
1090 goto cifs_parse_mount_err;
1093 case Opt_echo_interval:
1094 ctx->echo_interval = result.uint_32;
1097 ctx->snapshot_time = result.uint_64;
1099 case Opt_max_credits:
1100 if (result.uint_32 < 20 || result.uint_32 > 60000) {
1101 cifs_errorf(fc, "%s: Invalid max_credits value\n",
1103 goto cifs_parse_mount_err;
1105 ctx->max_credits = result.uint_32;
1107 case Opt_max_channels:
1108 if (result.uint_32 < 1 || result.uint_32 > CIFS_MAX_CHANNELS) {
1109 cifs_errorf(fc, "%s: Invalid max_channels value, needs to be 1-%d\n",
1110 __func__, CIFS_MAX_CHANNELS);
1111 goto cifs_parse_mount_err;
1113 ctx->max_channels = result.uint_32;
1114 /* If more than one channel requested ... they want multichan */
1115 if (result.uint_32 > 1)
1116 ctx->multichannel = true;
1118 case Opt_handletimeout:
1119 ctx->handle_timeout = result.uint_32;
1120 if (ctx->handle_timeout > SMB3_MAX_HANDLE_TIMEOUT) {
1121 cifs_errorf(fc, "Invalid handle cache timeout, longer than 16 minutes\n");
1122 goto cifs_parse_mount_err;
1128 switch (smb3_parse_devname(param->string, ctx)) {
1132 cifs_errorf(fc, "Unable to allocate memory for devname\n");
1133 goto cifs_parse_mount_err;
1135 cifs_errorf(fc, "Malformed UNC in devname\n");
1136 goto cifs_parse_mount_err;
1138 cifs_errorf(fc, "Unknown error parsing devname\n");
1139 goto cifs_parse_mount_err;
1141 ctx->source = kstrdup(param->string, GFP_KERNEL);
1142 if (ctx->source == NULL) {
1143 cifs_errorf(fc, "OOM when copying UNC string\n");
1144 goto cifs_parse_mount_err;
1146 fc->source = kstrdup(param->string, GFP_KERNEL);
1147 if (fc->source == NULL) {
1148 cifs_errorf(fc, "OOM when copying UNC string\n");
1149 goto cifs_parse_mount_err;
1153 kfree(ctx->username);
1154 ctx->username = NULL;
1155 if (strlen(param->string) == 0) {
1156 /* null user, ie. anonymous authentication */
1161 if (strnlen(param->string, CIFS_MAX_USERNAME_LEN) >
1162 CIFS_MAX_USERNAME_LEN) {
1163 pr_warn("username too long\n");
1164 goto cifs_parse_mount_err;
1166 ctx->username = kstrdup(param->string, GFP_KERNEL);
1167 if (ctx->username == NULL) {
1168 cifs_errorf(fc, "OOM when copying username string\n");
1169 goto cifs_parse_mount_err;
1173 kfree_sensitive(ctx->password);
1174 ctx->password = NULL;
1175 if (strlen(param->string) == 0)
1178 ctx->password = kstrdup(param->string, GFP_KERNEL);
1179 if (ctx->password == NULL) {
1180 cifs_errorf(fc, "OOM when copying password string\n");
1181 goto cifs_parse_mount_err;
1185 if (strlen(param->string) == 0) {
1186 ctx->got_ip = false;
1189 if (!cifs_convert_address((struct sockaddr *)&ctx->dstaddr,
1191 strlen(param->string))) {
1192 pr_err("bad ip= option (%s)\n", param->string);
1193 goto cifs_parse_mount_err;
1198 if (strnlen(param->string, CIFS_MAX_DOMAINNAME_LEN)
1199 == CIFS_MAX_DOMAINNAME_LEN) {
1200 pr_warn("domain name too long\n");
1201 goto cifs_parse_mount_err;
1204 kfree(ctx->domainname);
1205 ctx->domainname = kstrdup(param->string, GFP_KERNEL);
1206 if (ctx->domainname == NULL) {
1207 cifs_errorf(fc, "OOM when copying domainname string\n");
1208 goto cifs_parse_mount_err;
1210 cifs_dbg(FYI, "Domain name set\n");
1213 if (!cifs_convert_address(
1214 (struct sockaddr *)&ctx->srcaddr,
1215 param->string, strlen(param->string))) {
1216 pr_warn("Could not parse srcaddr: %s\n",
1218 goto cifs_parse_mount_err;
1222 if (strnlen(param->string, 1024) >= 65) {
1223 pr_warn("iocharset name too long\n");
1224 goto cifs_parse_mount_err;
1227 if (strncasecmp(param->string, "default", 7) != 0) {
1228 kfree(ctx->iocharset);
1229 ctx->iocharset = kstrdup(param->string, GFP_KERNEL);
1230 if (ctx->iocharset == NULL) {
1231 cifs_errorf(fc, "OOM when copying iocharset string\n");
1232 goto cifs_parse_mount_err;
1235 /* if iocharset not set then load_nls_default
1238 cifs_dbg(FYI, "iocharset set to %s\n", ctx->iocharset);
1240 case Opt_netbiosname:
1241 memset(ctx->source_rfc1001_name, 0x20,
1244 * FIXME: are there cases in which a comma can
1245 * be valid in workstation netbios name (and
1246 * need special handling)?
1248 for (i = 0; i < RFC1001_NAME_LEN; i++) {
1249 /* don't ucase netbiosname for user */
1250 if (param->string[i] == 0)
1252 ctx->source_rfc1001_name[i] = param->string[i];
1254 /* The string has 16th byte zero still from
1255 * set at top of the function
1257 if (i == RFC1001_NAME_LEN && param->string[i] != 0)
1258 pr_warn("netbiosname longer than 15 truncated\n");
1261 /* last byte, type, is 0x20 for servr type */
1262 memset(ctx->target_rfc1001_name, 0x20,
1263 RFC1001_NAME_LEN_WITH_NULL);
1265 * BB are there cases in which a comma can be valid in this
1266 * workstation netbios name (and need special handling)?
1269 /* user or mount helper must uppercase the netbios name */
1270 for (i = 0; i < 15; i++) {
1271 if (param->string[i] == 0)
1273 ctx->target_rfc1001_name[i] = param->string[i];
1276 /* The string has 16th byte zero still from set at top of function */
1277 if (i == RFC1001_NAME_LEN && param->string[i] != 0)
1278 pr_warn("server netbiosname longer than 15 truncated\n");
1281 /* version of mount userspace tools, not dialect */
1282 /* If interface changes in mount.cifs bump to new ver */
1283 if (strncasecmp(param->string, "1", 1) == 0) {
1284 if (strlen(param->string) > 1) {
1285 pr_warn("Bad mount helper ver=%s. Did you want SMB1 (CIFS) dialect and mean to type vers=1.0 instead?\n",
1287 goto cifs_parse_mount_err;
1289 /* This is the default */
1292 /* For all other value, error */
1293 pr_warn("Invalid mount helper version specified\n");
1294 goto cifs_parse_mount_err;
1296 /* protocol version (dialect) */
1297 if (cifs_parse_smb_version(fc, param->string, ctx, is_smb3) != 0)
1298 goto cifs_parse_mount_err;
1299 ctx->got_version = true;
1302 if (cifs_parse_security_flavors(fc, param->string, ctx) != 0)
1303 goto cifs_parse_mount_err;
1306 if (cifs_parse_cache_flavor(fc, param->string, ctx) != 0)
1307 goto cifs_parse_mount_err;
1310 #ifndef CONFIG_CIFS_SWN_UPCALL
1311 cifs_errorf(fc, "Witness support needs CONFIG_CIFS_SWN_UPCALL config option\n");
1312 goto cifs_parse_mount_err;
1314 ctx->witness = true;
1315 pr_warn_once("Witness protocol support is experimental\n");
1318 #ifndef CONFIG_CIFS_ROOT
1319 cifs_dbg(VFS, "rootfs support requires CONFIG_CIFS_ROOT config option\n");
1320 goto cifs_parse_mount_err;
1324 case Opt_posixpaths:
1326 ctx->posix_paths = 0;
1328 ctx->posix_paths = 1;
1331 if (result.negated) {
1332 if (ctx->linux_ext == 1)
1333 pr_warn_once("conflicting posix mount options specified\n");
1335 ctx->no_linux_ext = 1;
1337 if (ctx->no_linux_ext == 1)
1338 pr_warn_once("conflicting posix mount options specified\n");
1340 ctx->no_linux_ext = 0;
1347 if (result.negated) {
1349 * turn off mandatory locking in mode
1350 * if remote locking is turned off since the
1351 * local vfs will do advisory
1353 if (ctx->file_mode ==
1354 (S_IALLUGO & ~(S_ISUID | S_IXGRP)))
1355 ctx->file_mode = S_IALLUGO;
1360 case Opt_handlecache:
1362 ctx->nohandlecache = 1;
1364 ctx->nohandlecache = 0;
1366 case Opt_forcemandatorylock:
1370 ctx->setuids = result.negated;
1373 ctx->intr = !result.negated;
1375 case Opt_setuidfromacl:
1376 ctx->setuidfromacl = 1;
1378 case Opt_strictsync:
1379 ctx->nostrictsync = result.negated;
1382 ctx->server_ino = !result.negated;
1384 case Opt_rwpidforward:
1385 ctx->rwpidforward = 1;
1391 ctx->cifs_acl = !result.negated;
1394 ctx->no_psx_acl = result.negated;
1396 case Opt_locallease:
1397 ctx->local_lease = 1;
1402 case Opt_ignore_signature:
1404 ctx->ignore_signature = true;
1407 /* we do not do the following in secFlags because seal
1408 * is a per tree connection (mount) not a per socket
1409 * or per-smb connection option in the protocol
1410 * vol->secFlg |= CIFSSEC_MUST_SEAL;
1415 pr_warn("Mount option noac not supported. Instead set /proc/fs/cifs/LookupCacheEnabled to 0\n");
1418 #ifndef CONFIG_CIFS_FSCACHE
1419 cifs_errorf(fc, "FS-Cache support needs CONFIG_CIFS_FSCACHE kernel config option set\n");
1420 goto cifs_parse_mount_err;
1424 case Opt_mfsymlinks:
1425 ctx->mfsymlinks = true;
1428 ctx->multiuser = true;
1433 case Opt_nosharesock:
1434 ctx->nosharesock = true;
1436 case Opt_persistent:
1437 if (result.negated) {
1438 ctx->nopersistent = true;
1439 if (ctx->persistent) {
1440 cifs_errorf(fc, "persistenthandles mount options conflict\n");
1441 goto cifs_parse_mount_err;
1444 ctx->persistent = true;
1445 if ((ctx->nopersistent) || (ctx->resilient)) {
1446 cifs_errorf(fc, "persistenthandles mount options conflict\n");
1447 goto cifs_parse_mount_err;
1452 if (result.negated) {
1453 ctx->resilient = false; /* already the default */
1455 ctx->resilient = true;
1456 if (ctx->persistent) {
1457 cifs_errorf(fc, "persistenthandles mount options conflict\n");
1458 goto cifs_parse_mount_err;
1462 case Opt_tcp_nodelay:
1463 /* tcp nodelay should not usually be needed since we CORK/UNCORK the socket */
1465 ctx->sockopt_tcp_nodelay = false;
1467 ctx->sockopt_tcp_nodelay = true;
1469 case Opt_domainauto:
1470 ctx->domainauto = true;
1476 /* case Opt_ignore: - is ignored as expected ... */
1480 cifs_parse_mount_err:
1481 kfree_sensitive(ctx->password);
1485 int smb3_init_fs_context(struct fs_context *fc)
1487 struct smb3_fs_context *ctx;
1488 char *nodename = utsname()->nodename;
1491 ctx = kzalloc(sizeof(struct smb3_fs_context), GFP_KERNEL);
1495 strscpy(ctx->workstation_name, nodename, sizeof(ctx->workstation_name));
1498 * does not have to be perfect mapping since field is
1499 * informational, only used for servers that do not support
1500 * port 445 and it can be overridden at mount time
1502 memset(ctx->source_rfc1001_name, 0x20, RFC1001_NAME_LEN);
1503 for (i = 0; i < strnlen(nodename, RFC1001_NAME_LEN); i++)
1504 ctx->source_rfc1001_name[i] = toupper(nodename[i]);
1506 ctx->source_rfc1001_name[RFC1001_NAME_LEN] = 0;
1508 * null target name indicates to use *SMBSERVR default called name
1509 * if we end up sending RFC1001 session initialize
1511 ctx->target_rfc1001_name[0] = 0;
1512 ctx->cred_uid = current_uid();
1513 ctx->linux_uid = current_uid();
1514 ctx->linux_gid = current_gid();
1515 /* By default 4MB read ahead size, 1MB block size */
1516 ctx->bsize = CIFS_DEFAULT_IOSIZE; /* can improve cp performance significantly */
1517 ctx->rasize = 0; /* 0 = use default (ie negotiated rsize) for read ahead pages */
1520 * default to SFM style remapping of seven reserved characters
1521 * unless user overrides it or we negotiate CIFS POSIX where
1522 * it is unnecessary. Can not simultaneously use more than one mapping
1523 * since then readdir could list files that open could not open
1527 /* default to only allowing write access to owner of the mount */
1528 ctx->dir_mode = ctx->file_mode = S_IRUGO | S_IXUGO | S_IWUSR;
1530 /* ctx->retry default is 0 (i.e. "soft" limited retry not hard retry) */
1531 /* default is always to request posix paths. */
1532 ctx->posix_paths = 1;
1533 /* default to using server inode numbers where available */
1534 ctx->server_ino = 1;
1536 /* default is to use strict cifs caching semantics */
1537 ctx->strict_io = true;
1539 ctx->acregmax = CIFS_DEF_ACTIMEO;
1540 ctx->acdirmax = CIFS_DEF_ACTIMEO;
1541 ctx->closetimeo = SMB3_DEF_DCLOSETIMEO;
1543 /* Most clients set timeout to 0, allows server to use its default */
1544 ctx->handle_timeout = 0; /* See MS-SMB2 spec section 2.2.14.2.12 */
1546 /* offer SMB2.1 and later (SMB3 etc). Secure and widely accepted */
1547 ctx->ops = &smb30_operations;
1548 ctx->vals = &smbdefault_values;
1550 ctx->echo_interval = SMB_ECHO_INTERVAL_DEFAULT;
1552 /* default to no multichannel (single server connection) */
1553 ctx->multichannel = false;
1554 ctx->max_channels = 1;
1556 ctx->backupuid_specified = false; /* no backup intent for a user */
1557 ctx->backupgid_specified = false; /* no backup intent for a group */
1560 * short int override_uid = -1;
1561 * short int override_gid = -1;
1562 * char *nodename = strdup(utsname()->nodename);
1563 * struct sockaddr *dstaddr = (struct sockaddr *)&vol->dstaddr;
1566 fc->fs_private = ctx;
1567 fc->ops = &smb3_fs_context_ops;
1572 smb3_cleanup_fs_context_contents(struct smb3_fs_context *ctx)
1578 * Make sure this stays in sync with smb3_fs_context_dup()
1580 kfree(ctx->mount_options);
1581 ctx->mount_options = NULL;
1582 kfree(ctx->username);
1583 ctx->username = NULL;
1584 kfree_sensitive(ctx->password);
1585 ctx->password = NULL;
1586 kfree(ctx->server_hostname);
1587 ctx->server_hostname = NULL;
1592 kfree(ctx->domainname);
1593 ctx->domainname = NULL;
1594 kfree(ctx->nodename);
1595 ctx->nodename = NULL;
1596 kfree(ctx->iocharset);
1597 ctx->iocharset = NULL;
1598 kfree(ctx->prepath);
1599 ctx->prepath = NULL;
1603 smb3_cleanup_fs_context(struct smb3_fs_context *ctx)
1607 smb3_cleanup_fs_context_contents(ctx);
1611 void smb3_update_mnt_flags(struct cifs_sb_info *cifs_sb)
1613 struct smb3_fs_context *ctx = cifs_sb->ctx;
1616 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_DFS;
1618 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_NO_DFS;
1621 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM;
1623 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_NO_PERM;
1626 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID;
1628 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SET_UID;
1630 if (ctx->setuidfromacl)
1631 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UID_FROM_ACL;
1633 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_UID_FROM_ACL;
1635 if (ctx->server_ino)
1636 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM;
1638 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SERVER_INUM;
1641 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SFM_CHR;
1643 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_MAP_SFM_CHR;
1646 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR;
1648 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_MAP_SPECIAL_CHR;
1651 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR;
1653 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_NO_XATTR;
1656 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL;
1658 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_UNX_EMUL;
1661 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL;
1663 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_NO_BRL;
1665 if (ctx->nohandlecache)
1666 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_HANDLE_CACHE;
1668 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_NO_HANDLE_CACHE;
1670 if (ctx->nostrictsync)
1671 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOSSYNC;
1673 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_NOSSYNC;
1676 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOPOSIXBRL;
1678 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_NOPOSIXBRL;
1680 if (ctx->rwpidforward)
1681 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_RWPIDFORWARD;
1683 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_RWPIDFORWARD;
1686 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MODE_FROM_SID;
1688 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_MODE_FROM_SID;
1691 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL;
1693 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_CIFS_ACL;
1695 if (ctx->backupuid_specified)
1696 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPUID;
1698 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_CIFS_BACKUPUID;
1700 if (ctx->backupgid_specified)
1701 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPGID;
1703 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_CIFS_BACKUPGID;
1705 if (ctx->override_uid)
1706 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID;
1708 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_OVERR_UID;
1710 if (ctx->override_gid)
1711 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID;
1713 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_OVERR_GID;
1716 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM;
1718 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_DYNPERM;
1721 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_FSCACHE;
1723 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_FSCACHE;
1726 cifs_sb->mnt_cifs_flags |= (CIFS_MOUNT_MULTIUSER |
1727 CIFS_MOUNT_NO_PERM);
1729 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_MULTIUSER;
1733 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_STRICT_IO;
1735 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_STRICT_IO;
1738 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO;
1740 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_DIRECT_IO;
1742 if (ctx->mfsymlinks)
1743 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MF_SYMLINKS;
1745 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_MF_SYMLINKS;
1746 if (ctx->mfsymlinks) {
1747 if (ctx->sfu_emul) {
1749 * Our SFU ("Services for Unix" emulation does not allow
1750 * creating symlinks but does allow reading existing SFU
1751 * symlinks (it does allow both creating and reading SFU
1752 * style mknod and FIFOs though). When "mfsymlinks" and
1753 * "sfu" are both enabled at the same time, it allows
1754 * reading both types of symlinks, but will only create
1755 * them with mfsymlinks format. This allows better
1756 * Apple compatibility (probably better for Samba too)
1757 * while still recognizing old Windows style symlinks.
1759 cifs_dbg(VFS, "mount options mfsymlinks and sfu both enabled\n");
1762 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SHUTDOWN;