1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (C) 2007 Casey Schaufler <casey@schaufler-ca.com>
6 * Casey Schaufler <casey@schaufler-ca.com>
7 * Ahmed S. Darwish <darwish.07@gmail.com>
9 * Special thanks to the authors of selinuxfs.
11 * Karl MacMillan <kmacmillan@tresys.com>
12 * James Morris <jmorris@redhat.com>
15 #include <linux/kernel.h>
16 #include <linux/vmalloc.h>
17 #include <linux/security.h>
18 #include <linux/mutex.h>
19 #include <linux/slab.h>
20 #include <net/net_namespace.h>
21 #include <net/cipso_ipv4.h>
22 #include <linux/seq_file.h>
23 #include <linux/ctype.h>
24 #include <linux/audit.h>
25 #include <linux/magic.h>
26 #include <linux/fs_context.h>
29 #define BEBITS (sizeof(__be32) * 8)
31 * smackfs pseudo filesystem.
36 SMK_LOAD = 3, /* load policy */
37 SMK_CIPSO = 4, /* load label -> CIPSO mapping */
38 SMK_DOI = 5, /* CIPSO DOI */
39 SMK_DIRECT = 6, /* CIPSO level indicating direct label */
40 SMK_AMBIENT = 7, /* internet ambient label */
41 SMK_NET4ADDR = 8, /* single label hosts */
42 SMK_ONLYCAP = 9, /* the only "capable" label */
43 SMK_LOGGING = 10, /* logging */
44 SMK_LOAD_SELF = 11, /* task specific rules */
45 SMK_ACCESSES = 12, /* access policy */
46 SMK_MAPPED = 13, /* CIPSO level indicating mapped label */
47 SMK_LOAD2 = 14, /* load policy with long labels */
48 SMK_LOAD_SELF2 = 15, /* load task specific rules with long labels */
49 SMK_ACCESS2 = 16, /* make an access check with long labels */
50 SMK_CIPSO2 = 17, /* load long label -> CIPSO mapping */
51 SMK_REVOKE_SUBJ = 18, /* set rules with subject label to '-' */
52 SMK_CHANGE_RULE = 19, /* change or add rules (long labels) */
53 SMK_SYSLOG = 20, /* change syslog label) */
54 SMK_PTRACE = 21, /* set ptrace rule */
55 #ifdef CONFIG_SECURITY_SMACK_BRINGUP
56 SMK_UNCONFINED = 22, /* define an unconfined label */
58 #if IS_ENABLED(CONFIG_IPV6)
59 SMK_NET6ADDR = 23, /* single label IPv6 hosts */
60 #endif /* CONFIG_IPV6 */
61 SMK_RELABEL_SELF = 24, /* relabel possible without CAP_MAC_ADMIN */
67 static DEFINE_MUTEX(smack_cipso_lock);
68 static DEFINE_MUTEX(smack_ambient_lock);
69 static DEFINE_MUTEX(smk_net4addr_lock);
70 #if IS_ENABLED(CONFIG_IPV6)
71 static DEFINE_MUTEX(smk_net6addr_lock);
72 #endif /* CONFIG_IPV6 */
75 * This is the "ambient" label for network traffic.
76 * If it isn't somehow marked, use this.
77 * It can be reset via smackfs/ambient
79 struct smack_known *smack_net_ambient;
82 * This is the level in a CIPSO header that indicates a
83 * smack label is contained directly in the category set.
84 * It can be reset via smackfs/direct
86 int smack_cipso_direct = SMACK_CIPSO_DIRECT_DEFAULT;
89 * This is the level in a CIPSO header that indicates a
90 * secid is contained directly in the category set.
91 * It can be reset via smackfs/mapped
93 int smack_cipso_mapped = SMACK_CIPSO_MAPPED_DEFAULT;
95 #ifdef CONFIG_SECURITY_SMACK_BRINGUP
97 * Allow one label to be unconfined. This is for
98 * debugging and application bring-up purposes only.
99 * It is bad and wrong, but everyone seems to expect
102 struct smack_known *smack_unconfined;
106 * If this value is set restrict syslog use to the label specified.
107 * It can be reset via smackfs/syslog
109 struct smack_known *smack_syslog_label;
112 * Ptrace current rule
113 * SMACK_PTRACE_DEFAULT regular smack ptrace rules (/proc based)
114 * SMACK_PTRACE_EXACT labels must match, but can be overriden with
116 * SMACK_PTRACE_DRACONIAN lables must match, CAP_SYS_PTRACE has no effect
118 int smack_ptrace_rule = SMACK_PTRACE_DEFAULT;
121 * Certain IP addresses may be designated as single label hosts.
122 * Packets are sent there unlabeled, but only from tasks that
123 * can write to the specified label.
126 LIST_HEAD(smk_net4addr_list);
127 #if IS_ENABLED(CONFIG_IPV6)
128 LIST_HEAD(smk_net6addr_list);
129 #endif /* CONFIG_IPV6 */
132 * Rule lists are maintained for each label.
134 struct smack_parsed_rule {
135 struct smack_known *smk_subject;
136 struct smack_known *smk_object;
141 static int smk_cipso_doi_value = SMACK_CIPSO_DOI_DEFAULT;
144 * Values for parsing cipso rules
145 * SMK_DIGITLEN: Length of a digit field in a rule.
146 * SMK_CIPSOMIN: Minimum possible cipso rule length.
147 * SMK_CIPSOMAX: Maximum possible cipso rule length.
149 #define SMK_DIGITLEN 4
150 #define SMK_CIPSOMIN (SMK_LABELLEN + 2 * SMK_DIGITLEN)
151 #define SMK_CIPSOMAX (SMK_CIPSOMIN + SMACK_CIPSO_MAXCATNUM * SMK_DIGITLEN)
154 * Values for parsing MAC rules
155 * SMK_ACCESS: Maximum possible combination of access permissions
156 * SMK_ACCESSLEN: Maximum length for a rule access field
157 * SMK_LOADLEN: Smack rule length
159 #define SMK_OACCESS "rwxa"
160 #define SMK_ACCESS "rwxatl"
161 #define SMK_OACCESSLEN (sizeof(SMK_OACCESS) - 1)
162 #define SMK_ACCESSLEN (sizeof(SMK_ACCESS) - 1)
163 #define SMK_OLOADLEN (SMK_LABELLEN + SMK_LABELLEN + SMK_OACCESSLEN)
164 #define SMK_LOADLEN (SMK_LABELLEN + SMK_LABELLEN + SMK_ACCESSLEN)
167 * Stricly for CIPSO level manipulation.
168 * Set the category bit number in a smack label sized buffer.
170 static inline void smack_catset_bit(unsigned int cat, char *catsetp)
172 if (cat == 0 || cat > (SMK_CIPSOLEN * 8))
175 catsetp[(cat - 1) / 8] |= 0x80 >> ((cat - 1) % 8);
179 * smk_netlabel_audit_set - fill a netlbl_audit struct
180 * @nap: structure to fill
182 static void smk_netlabel_audit_set(struct netlbl_audit *nap)
184 struct smack_known *skp = smk_of_current();
186 nap->loginuid = audit_get_loginuid(current);
187 nap->sessionid = audit_get_sessionid(current);
188 nap->secid = skp->smk_secid;
192 * Value for parsing single label host rules
195 #define SMK_NETLBLADDRMIN 9
198 * smk_set_access - add a rule to the rule list or replace an old rule
199 * @srp: the rule to add or replace
200 * @rule_list: the list of rules
201 * @rule_lock: the rule list lock
203 * Looks through the current subject/object/access list for
204 * the subject/object pair and replaces the access that was
205 * there. If the pair isn't found add it with the specified
208 * Returns 0 if nothing goes wrong or -ENOMEM if it fails
209 * during the allocation of the new pair to add.
211 static int smk_set_access(struct smack_parsed_rule *srp,
212 struct list_head *rule_list,
213 struct mutex *rule_lock)
215 struct smack_rule *sp;
219 mutex_lock(rule_lock);
222 * Because the object label is less likely to match
223 * than the subject label check it first
225 list_for_each_entry_rcu(sp, rule_list, list) {
226 if (sp->smk_object == srp->smk_object &&
227 sp->smk_subject == srp->smk_subject) {
229 sp->smk_access |= srp->smk_access1;
230 sp->smk_access &= ~srp->smk_access2;
236 sp = kmem_cache_zalloc(smack_rule_cache, GFP_KERNEL);
242 sp->smk_subject = srp->smk_subject;
243 sp->smk_object = srp->smk_object;
244 sp->smk_access = srp->smk_access1 & ~srp->smk_access2;
246 list_add_rcu(&sp->list, rule_list);
250 mutex_unlock(rule_lock);
255 * smk_perm_from_str - parse smack accesses from a text string
256 * @string: a text string that contains a Smack accesses code
258 * Returns an integer with respective bits set for specified accesses.
260 static int smk_perm_from_str(const char *string)
265 for (cp = string; ; cp++)
287 perm |= MAY_TRANSMUTE;
303 * smk_fill_rule - Fill Smack rule from strings
304 * @subject: subject label string
305 * @object: object label string
306 * @access1: access string
307 * @access2: string with permissions to be removed
309 * @import: if non-zero, import labels
310 * @len: label length limit
312 * Returns 0 on success, appropriate error code on failure.
314 static int smk_fill_rule(const char *subject, const char *object,
315 const char *access1, const char *access2,
316 struct smack_parsed_rule *rule, int import,
320 struct smack_known *skp;
323 rule->smk_subject = smk_import_entry(subject, len);
324 if (IS_ERR(rule->smk_subject))
325 return PTR_ERR(rule->smk_subject);
327 rule->smk_object = smk_import_entry(object, len);
328 if (IS_ERR(rule->smk_object))
329 return PTR_ERR(rule->smk_object);
331 cp = smk_parse_smack(subject, len);
334 skp = smk_find_entry(cp);
338 rule->smk_subject = skp;
340 cp = smk_parse_smack(object, len);
343 skp = smk_find_entry(cp);
347 rule->smk_object = skp;
350 rule->smk_access1 = smk_perm_from_str(access1);
352 rule->smk_access2 = smk_perm_from_str(access2);
354 rule->smk_access2 = ~rule->smk_access1;
360 * smk_parse_rule - parse Smack rule from load string
361 * @data: string to be parsed whose size is SMK_LOADLEN
363 * @import: if non-zero, import labels
365 * Returns 0 on success, -1 on errors.
367 static int smk_parse_rule(const char *data, struct smack_parsed_rule *rule,
372 rc = smk_fill_rule(data, data + SMK_LABELLEN,
373 data + SMK_LABELLEN + SMK_LABELLEN, NULL, rule,
374 import, SMK_LABELLEN);
379 * smk_parse_long_rule - parse Smack rule from rule string
380 * @data: string to be parsed, null terminated
381 * @rule: Will be filled with Smack parsed rule
382 * @import: if non-zero, import labels
383 * @tokens: numer of substrings expected in data
385 * Returns number of processed bytes on success, -ERRNO on failure.
387 static ssize_t smk_parse_long_rule(char *data, struct smack_parsed_rule *rule,
388 int import, int tokens)
396 * Parsing the rule in-place, filling all white-spaces with '\0'
398 for (i = 0; i < tokens; ++i) {
399 while (isspace(data[cnt]))
402 if (data[cnt] == '\0')
403 /* Unexpected end of data */
408 while (data[cnt] && !isspace(data[cnt]))
411 while (isspace(data[cnt]))
417 rc = smk_fill_rule(tok[0], tok[1], tok[2], tok[3], rule, import, 0);
418 return rc == 0 ? cnt : rc;
421 #define SMK_FIXED24_FMT 0 /* Fixed 24byte label format */
422 #define SMK_LONG_FMT 1 /* Variable long label format */
423 #define SMK_CHANGE_FMT 2 /* Rule modification format */
425 * smk_write_rules_list - write() for any /smack rule file
426 * @file: file pointer, not actually used
427 * @buf: where to get the data from
429 * @ppos: where to start - must be 0
430 * @rule_list: the list of rules to write to
431 * @rule_lock: lock for the rule list
432 * @format: /smack/load or /smack/load2 or /smack/change-rule format.
434 * Get one smack access rule from above.
435 * The format for SMK_LONG_FMT is:
436 * "subject<whitespace>object<whitespace>access[<whitespace>...]"
437 * The format for SMK_FIXED24_FMT is exactly:
438 * "subject object rwxat"
439 * The format for SMK_CHANGE_FMT is:
440 * "subject<whitespace>object<whitespace>
441 * acc_enable<whitespace>acc_disable[<whitespace>...]"
443 static ssize_t smk_write_rules_list(struct file *file, const char __user *buf,
444 size_t count, loff_t *ppos,
445 struct list_head *rule_list,
446 struct mutex *rule_lock, int format)
448 struct smack_parsed_rule rule;
457 * Enough data must be present.
462 if (format == SMK_FIXED24_FMT) {
464 * Minor hack for backward compatibility
466 if (count < SMK_OLOADLEN || count > SMK_LOADLEN)
469 if (count >= PAGE_SIZE) {
470 count = PAGE_SIZE - 1;
475 data = memdup_user_nul(buf, count);
477 return PTR_ERR(data);
480 * In case of parsing only part of user buf,
481 * avoid having partial rule at the data buffer
484 while (count > 0 && (data[count - 1] != '\n'))
493 tokens = (format == SMK_CHANGE_FMT ? 4 : 3);
494 while (cnt < count) {
495 if (format == SMK_FIXED24_FMT) {
496 rc = smk_parse_rule(data, &rule, 1);
501 rc = smk_parse_long_rule(data + cnt, &rule, 1, tokens);
511 if (rule_list == NULL)
512 rc = smk_set_access(&rule, &rule.smk_subject->smk_rules,
513 &rule.smk_subject->smk_rules_lock);
515 rc = smk_set_access(&rule, rule_list, rule_lock);
528 * Core logic for smackfs seq list operations.
531 static void *smk_seq_start(struct seq_file *s, loff_t *pos,
532 struct list_head *head)
534 struct list_head *list;
538 for (list = rcu_dereference(list_next_rcu(head));
540 list = rcu_dereference(list_next_rcu(list))) {
548 static void *smk_seq_next(struct seq_file *s, void *v, loff_t *pos,
549 struct list_head *head)
551 struct list_head *list = v;
554 list = rcu_dereference(list_next_rcu(list));
556 return (list == head) ? NULL : list;
559 static void smk_seq_stop(struct seq_file *s, void *v)
564 static void smk_rule_show(struct seq_file *s, struct smack_rule *srp, int max)
567 * Don't show any rules with label names too long for
568 * interface file (/smack/load or /smack/load2)
569 * because you should expect to be able to write
570 * anything you read back.
572 if (strlen(srp->smk_subject->smk_known) >= max ||
573 strlen(srp->smk_object->smk_known) >= max)
576 if (srp->smk_access == 0)
579 seq_printf(s, "%s %s",
580 srp->smk_subject->smk_known,
581 srp->smk_object->smk_known);
585 if (srp->smk_access & MAY_READ)
587 if (srp->smk_access & MAY_WRITE)
589 if (srp->smk_access & MAY_EXEC)
591 if (srp->smk_access & MAY_APPEND)
593 if (srp->smk_access & MAY_TRANSMUTE)
595 if (srp->smk_access & MAY_LOCK)
597 if (srp->smk_access & MAY_BRINGUP)
604 * Seq_file read operations for /smack/load
607 static void *load2_seq_start(struct seq_file *s, loff_t *pos)
609 return smk_seq_start(s, pos, &smack_known_list);
612 static void *load2_seq_next(struct seq_file *s, void *v, loff_t *pos)
614 return smk_seq_next(s, v, pos, &smack_known_list);
617 static int load_seq_show(struct seq_file *s, void *v)
619 struct list_head *list = v;
620 struct smack_rule *srp;
621 struct smack_known *skp =
622 list_entry_rcu(list, struct smack_known, list);
624 list_for_each_entry_rcu(srp, &skp->smk_rules, list)
625 smk_rule_show(s, srp, SMK_LABELLEN);
630 static const struct seq_operations load_seq_ops = {
631 .start = load2_seq_start,
632 .next = load2_seq_next,
633 .show = load_seq_show,
634 .stop = smk_seq_stop,
638 * smk_open_load - open() for /smack/load
639 * @inode: inode structure representing file
640 * @file: "load" file pointer
642 * For reading, use load_seq_* seq_file reading operations.
644 static int smk_open_load(struct inode *inode, struct file *file)
646 return seq_open(file, &load_seq_ops);
650 * smk_write_load - write() for /smack/load
651 * @file: file pointer, not actually used
652 * @buf: where to get the data from
654 * @ppos: where to start - must be 0
657 static ssize_t smk_write_load(struct file *file, const char __user *buf,
658 size_t count, loff_t *ppos)
661 * Must have privilege.
663 * Enough data must be present.
665 if (!smack_privileged(CAP_MAC_ADMIN))
668 return smk_write_rules_list(file, buf, count, ppos, NULL, NULL,
672 static const struct file_operations smk_load_ops = {
673 .open = smk_open_load,
676 .write = smk_write_load,
677 .release = seq_release,
681 * smk_cipso_doi - initialize the CIPSO domain
683 static void smk_cipso_doi(void)
686 struct cipso_v4_doi *doip;
687 struct netlbl_audit nai;
689 smk_netlabel_audit_set(&nai);
691 rc = netlbl_cfg_map_del(NULL, PF_INET, NULL, NULL, &nai);
693 printk(KERN_WARNING "%s:%d remove rc = %d\n",
694 __func__, __LINE__, rc);
696 doip = kmalloc(sizeof(struct cipso_v4_doi), GFP_KERNEL);
698 panic("smack: Failed to initialize cipso DOI.\n");
699 doip->map.std = NULL;
700 doip->doi = smk_cipso_doi_value;
701 doip->type = CIPSO_V4_MAP_PASS;
702 doip->tags[0] = CIPSO_V4_TAG_RBITMAP;
703 for (rc = 1; rc < CIPSO_V4_TAG_MAXCNT; rc++)
704 doip->tags[rc] = CIPSO_V4_TAG_INVALID;
706 rc = netlbl_cfg_cipsov4_add(doip, &nai);
708 printk(KERN_WARNING "%s:%d cipso add rc = %d\n",
709 __func__, __LINE__, rc);
713 rc = netlbl_cfg_cipsov4_map_add(doip->doi, NULL, NULL, NULL, &nai);
715 printk(KERN_WARNING "%s:%d map add rc = %d\n",
716 __func__, __LINE__, rc);
723 * smk_unlbl_ambient - initialize the unlabeled domain
724 * @oldambient: previous domain string
726 static void smk_unlbl_ambient(char *oldambient)
729 struct netlbl_audit nai;
731 smk_netlabel_audit_set(&nai);
733 if (oldambient != NULL) {
734 rc = netlbl_cfg_map_del(oldambient, PF_INET, NULL, NULL, &nai);
736 printk(KERN_WARNING "%s:%d remove rc = %d\n",
737 __func__, __LINE__, rc);
739 if (smack_net_ambient == NULL)
740 smack_net_ambient = &smack_known_floor;
742 rc = netlbl_cfg_unlbl_map_add(smack_net_ambient->smk_known, PF_INET,
745 printk(KERN_WARNING "%s:%d add rc = %d\n",
746 __func__, __LINE__, rc);
750 * Seq_file read operations for /smack/cipso
753 static void *cipso_seq_start(struct seq_file *s, loff_t *pos)
755 return smk_seq_start(s, pos, &smack_known_list);
758 static void *cipso_seq_next(struct seq_file *s, void *v, loff_t *pos)
760 return smk_seq_next(s, v, pos, &smack_known_list);
764 * Print cipso labels in format:
765 * label level[/cat[,cat]]
767 static int cipso_seq_show(struct seq_file *s, void *v)
769 struct list_head *list = v;
770 struct smack_known *skp =
771 list_entry_rcu(list, struct smack_known, list);
772 struct netlbl_lsm_catmap *cmp = skp->smk_netlabel.attr.mls.cat;
777 * Don't show a label that could not have been set using
778 * /smack/cipso. This is in support of the notion that
779 * anything read from /smack/cipso ought to be writeable
782 * /smack/cipso2 should be used instead.
784 if (strlen(skp->smk_known) >= SMK_LABELLEN)
787 seq_printf(s, "%s %3d", skp->smk_known, skp->smk_netlabel.attr.mls.lvl);
789 for (i = netlbl_catmap_walk(cmp, 0); i >= 0;
790 i = netlbl_catmap_walk(cmp, i + 1)) {
791 seq_printf(s, "%c%d", sep, i);
800 static const struct seq_operations cipso_seq_ops = {
801 .start = cipso_seq_start,
802 .next = cipso_seq_next,
803 .show = cipso_seq_show,
804 .stop = smk_seq_stop,
808 * smk_open_cipso - open() for /smack/cipso
809 * @inode: inode structure representing file
810 * @file: "cipso" file pointer
812 * Connect our cipso_seq_* operations with /smack/cipso
815 static int smk_open_cipso(struct inode *inode, struct file *file)
817 return seq_open(file, &cipso_seq_ops);
821 * smk_set_cipso - do the work for write() for cipso and cipso2
822 * @file: file pointer, not actually used
823 * @buf: where to get the data from
825 * @ppos: where to start
826 * @format: /smack/cipso or /smack/cipso2
828 * Accepts only one cipso rule per write call.
829 * Returns number of bytes written or error code, as appropriate
831 static ssize_t smk_set_cipso(struct file *file, const char __user *buf,
832 size_t count, loff_t *ppos, int format)
834 struct smack_known *skp;
835 struct netlbl_lsm_secattr ncats;
836 char mapcatset[SMK_CIPSOLEN];
840 ssize_t rc = -EINVAL;
847 * Must have privilege.
849 * Enough data must be present.
851 if (!smack_privileged(CAP_MAC_ADMIN))
855 if (format == SMK_FIXED24_FMT &&
856 (count < SMK_CIPSOMIN || count > SMK_CIPSOMAX))
859 data = memdup_user_nul(buf, count);
861 return PTR_ERR(data);
865 * Only allow one writer at a time. Writes should be
866 * quite rare and small in any case.
868 mutex_lock(&smack_cipso_lock);
870 skp = smk_import_entry(rule, 0);
876 if (format == SMK_FIXED24_FMT)
877 rule += SMK_LABELLEN;
879 rule += strlen(skp->smk_known) + 1;
881 if (rule > data + count) {
886 ret = sscanf(rule, "%d", &maplevel);
887 if (ret != 1 || maplevel < 0 || maplevel > SMACK_CIPSO_MAXLEVEL)
890 rule += SMK_DIGITLEN;
891 if (rule > data + count) {
896 ret = sscanf(rule, "%d", &catlen);
897 if (ret != 1 || catlen > SMACK_CIPSO_MAXCATNUM)
900 if (format == SMK_FIXED24_FMT &&
901 count != (SMK_CIPSOMIN + catlen * SMK_DIGITLEN))
904 memset(mapcatset, 0, sizeof(mapcatset));
906 for (i = 0; i < catlen; i++) {
907 rule += SMK_DIGITLEN;
908 if (rule > data + count) {
912 ret = sscanf(rule, "%u", &cat);
913 if (ret != 1 || cat > SMACK_CIPSO_MAXCATNUM)
916 smack_catset_bit(cat, mapcatset);
919 rc = smk_netlbl_mls(maplevel, mapcatset, &ncats, SMK_CIPSOLEN);
921 netlbl_catmap_free(skp->smk_netlabel.attr.mls.cat);
922 skp->smk_netlabel.attr.mls.cat = ncats.attr.mls.cat;
923 skp->smk_netlabel.attr.mls.lvl = ncats.attr.mls.lvl;
928 mutex_unlock(&smack_cipso_lock);
934 * smk_write_cipso - write() for /smack/cipso
935 * @file: file pointer, not actually used
936 * @buf: where to get the data from
938 * @ppos: where to start
940 * Accepts only one cipso rule per write call.
941 * Returns number of bytes written or error code, as appropriate
943 static ssize_t smk_write_cipso(struct file *file, const char __user *buf,
944 size_t count, loff_t *ppos)
946 return smk_set_cipso(file, buf, count, ppos, SMK_FIXED24_FMT);
949 static const struct file_operations smk_cipso_ops = {
950 .open = smk_open_cipso,
953 .write = smk_write_cipso,
954 .release = seq_release,
958 * Seq_file read operations for /smack/cipso2
962 * Print cipso labels in format:
963 * label level[/cat[,cat]]
965 static int cipso2_seq_show(struct seq_file *s, void *v)
967 struct list_head *list = v;
968 struct smack_known *skp =
969 list_entry_rcu(list, struct smack_known, list);
970 struct netlbl_lsm_catmap *cmp = skp->smk_netlabel.attr.mls.cat;
974 seq_printf(s, "%s %3d", skp->smk_known, skp->smk_netlabel.attr.mls.lvl);
976 for (i = netlbl_catmap_walk(cmp, 0); i >= 0;
977 i = netlbl_catmap_walk(cmp, i + 1)) {
978 seq_printf(s, "%c%d", sep, i);
987 static const struct seq_operations cipso2_seq_ops = {
988 .start = cipso_seq_start,
989 .next = cipso_seq_next,
990 .show = cipso2_seq_show,
991 .stop = smk_seq_stop,
995 * smk_open_cipso2 - open() for /smack/cipso2
996 * @inode: inode structure representing file
997 * @file: "cipso2" file pointer
999 * Connect our cipso_seq_* operations with /smack/cipso2
1002 static int smk_open_cipso2(struct inode *inode, struct file *file)
1004 return seq_open(file, &cipso2_seq_ops);
1008 * smk_write_cipso2 - write() for /smack/cipso2
1009 * @file: file pointer, not actually used
1010 * @buf: where to get the data from
1011 * @count: bytes sent
1012 * @ppos: where to start
1014 * Accepts only one cipso rule per write call.
1015 * Returns number of bytes written or error code, as appropriate
1017 static ssize_t smk_write_cipso2(struct file *file, const char __user *buf,
1018 size_t count, loff_t *ppos)
1020 return smk_set_cipso(file, buf, count, ppos, SMK_LONG_FMT);
1023 static const struct file_operations smk_cipso2_ops = {
1024 .open = smk_open_cipso2,
1026 .llseek = seq_lseek,
1027 .write = smk_write_cipso2,
1028 .release = seq_release,
1032 * Seq_file read operations for /smack/netlabel
1035 static void *net4addr_seq_start(struct seq_file *s, loff_t *pos)
1037 return smk_seq_start(s, pos, &smk_net4addr_list);
1040 static void *net4addr_seq_next(struct seq_file *s, void *v, loff_t *pos)
1042 return smk_seq_next(s, v, pos, &smk_net4addr_list);
1046 * Print host/label pairs
1048 static int net4addr_seq_show(struct seq_file *s, void *v)
1050 struct list_head *list = v;
1051 struct smk_net4addr *skp =
1052 list_entry_rcu(list, struct smk_net4addr, list);
1053 char *kp = SMACK_CIPSO_OPTION;
1055 if (skp->smk_label != NULL)
1056 kp = skp->smk_label->smk_known;
1057 seq_printf(s, "%pI4/%d %s\n", &skp->smk_host.s_addr,
1058 skp->smk_masks, kp);
1063 static const struct seq_operations net4addr_seq_ops = {
1064 .start = net4addr_seq_start,
1065 .next = net4addr_seq_next,
1066 .show = net4addr_seq_show,
1067 .stop = smk_seq_stop,
1071 * smk_open_net4addr - open() for /smack/netlabel
1072 * @inode: inode structure representing file
1073 * @file: "netlabel" file pointer
1075 * Connect our net4addr_seq_* operations with /smack/netlabel
1078 static int smk_open_net4addr(struct inode *inode, struct file *file)
1080 return seq_open(file, &net4addr_seq_ops);
1084 * smk_net4addr_insert
1085 * @new : netlabel to insert
1087 * This helper insert netlabel in the smack_net4addrs list
1088 * sorted by netmask length (longest to smallest)
1089 * locked by &smk_net4addr_lock in smk_write_net4addr
1092 static void smk_net4addr_insert(struct smk_net4addr *new)
1094 struct smk_net4addr *m;
1095 struct smk_net4addr *m_next;
1097 if (list_empty(&smk_net4addr_list)) {
1098 list_add_rcu(&new->list, &smk_net4addr_list);
1102 m = list_entry_rcu(smk_net4addr_list.next,
1103 struct smk_net4addr, list);
1105 /* the comparison '>' is a bit hacky, but works */
1106 if (new->smk_masks > m->smk_masks) {
1107 list_add_rcu(&new->list, &smk_net4addr_list);
1111 list_for_each_entry_rcu(m, &smk_net4addr_list, list) {
1112 if (list_is_last(&m->list, &smk_net4addr_list)) {
1113 list_add_rcu(&new->list, &m->list);
1116 m_next = list_entry_rcu(m->list.next,
1117 struct smk_net4addr, list);
1118 if (new->smk_masks > m_next->smk_masks) {
1119 list_add_rcu(&new->list, &m->list);
1127 * smk_write_net4addr - write() for /smack/netlabel
1128 * @file: file pointer, not actually used
1129 * @buf: where to get the data from
1130 * @count: bytes sent
1131 * @ppos: where to start
1133 * Accepts only one net4addr per write call.
1134 * Returns number of bytes written or error code, as appropriate
1136 static ssize_t smk_write_net4addr(struct file *file, const char __user *buf,
1137 size_t count, loff_t *ppos)
1139 struct smk_net4addr *snp;
1140 struct sockaddr_in newname;
1142 struct smack_known *skp = NULL;
1144 char *host = (char *)&newname.sin_addr.s_addr;
1146 struct netlbl_audit audit_info;
1147 struct in_addr mask;
1151 u32 mask_bits = (1<<31);
1156 * Must have privilege.
1157 * No partial writes.
1158 * Enough data must be present.
1159 * "<addr/mask, as a.b.c.d/e><space><label>"
1160 * "<addr, as a.b.c.d><space><label>"
1162 if (!smack_privileged(CAP_MAC_ADMIN))
1166 if (count < SMK_NETLBLADDRMIN)
1169 data = memdup_user_nul(buf, count);
1171 return PTR_ERR(data);
1173 smack = kzalloc(count + 1, GFP_KERNEL);
1174 if (smack == NULL) {
1179 rc = sscanf(data, "%hhd.%hhd.%hhd.%hhd/%u %s",
1180 &host[0], &host[1], &host[2], &host[3], &masks, smack);
1182 rc = sscanf(data, "%hhd.%hhd.%hhd.%hhd %s",
1183 &host[0], &host[1], &host[2], &host[3], smack);
1191 if (masks > BEBITS) {
1197 * If smack begins with '-', it is an option, don't import it
1199 if (smack[0] != '-') {
1200 skp = smk_import_entry(smack, 0);
1207 * Only the -CIPSO option is supported for IPv4
1209 if (strcmp(smack, SMACK_CIPSO_OPTION) != 0) {
1215 for (m = masks, temp_mask = 0; m > 0; m--) {
1216 temp_mask |= mask_bits;
1219 mask.s_addr = cpu_to_be32(temp_mask);
1221 newname.sin_addr.s_addr &= mask.s_addr;
1223 * Only allow one writer at a time. Writes should be
1224 * quite rare and small in any case.
1226 mutex_lock(&smk_net4addr_lock);
1228 nsa = newname.sin_addr.s_addr;
1229 /* try to find if the prefix is already in the list */
1231 list_for_each_entry_rcu(snp, &smk_net4addr_list, list) {
1232 if (snp->smk_host.s_addr == nsa && snp->smk_masks == masks) {
1237 smk_netlabel_audit_set(&audit_info);
1240 snp = kzalloc(sizeof(*snp), GFP_KERNEL);
1245 snp->smk_host.s_addr = newname.sin_addr.s_addr;
1246 snp->smk_mask.s_addr = mask.s_addr;
1247 snp->smk_label = skp;
1248 snp->smk_masks = masks;
1249 smk_net4addr_insert(snp);
1253 * Delete the unlabeled entry, only if the previous label
1254 * wasn't the special CIPSO option
1256 if (snp->smk_label != NULL)
1257 rc = netlbl_cfg_unlbl_static_del(&init_net, NULL,
1258 &snp->smk_host, &snp->smk_mask,
1259 PF_INET, &audit_info);
1262 snp->smk_label = skp;
1266 * Now tell netlabel about the single label nature of
1267 * this host so that incoming packets get labeled.
1268 * but only if we didn't get the special CIPSO option
1270 if (rc == 0 && skp != NULL)
1271 rc = netlbl_cfg_unlbl_static_add(&init_net, NULL,
1272 &snp->smk_host, &snp->smk_mask, PF_INET,
1273 snp->smk_label->smk_secid, &audit_info);
1278 mutex_unlock(&smk_net4addr_lock);
1288 static const struct file_operations smk_net4addr_ops = {
1289 .open = smk_open_net4addr,
1291 .llseek = seq_lseek,
1292 .write = smk_write_net4addr,
1293 .release = seq_release,
1296 #if IS_ENABLED(CONFIG_IPV6)
1298 * Seq_file read operations for /smack/netlabel6
1301 static void *net6addr_seq_start(struct seq_file *s, loff_t *pos)
1303 return smk_seq_start(s, pos, &smk_net6addr_list);
1306 static void *net6addr_seq_next(struct seq_file *s, void *v, loff_t *pos)
1308 return smk_seq_next(s, v, pos, &smk_net6addr_list);
1312 * Print host/label pairs
1314 static int net6addr_seq_show(struct seq_file *s, void *v)
1316 struct list_head *list = v;
1317 struct smk_net6addr *skp =
1318 list_entry(list, struct smk_net6addr, list);
1320 if (skp->smk_label != NULL)
1321 seq_printf(s, "%pI6/%d %s\n", &skp->smk_host, skp->smk_masks,
1322 skp->smk_label->smk_known);
1327 static const struct seq_operations net6addr_seq_ops = {
1328 .start = net6addr_seq_start,
1329 .next = net6addr_seq_next,
1330 .show = net6addr_seq_show,
1331 .stop = smk_seq_stop,
1335 * smk_open_net6addr - open() for /smack/netlabel
1336 * @inode: inode structure representing file
1337 * @file: "netlabel" file pointer
1339 * Connect our net6addr_seq_* operations with /smack/netlabel
1342 static int smk_open_net6addr(struct inode *inode, struct file *file)
1344 return seq_open(file, &net6addr_seq_ops);
1348 * smk_net6addr_insert
1349 * @new : entry to insert
1351 * This inserts an entry in the smack_net6addrs list
1352 * sorted by netmask length (longest to smallest)
1353 * locked by &smk_net6addr_lock in smk_write_net6addr
1356 static void smk_net6addr_insert(struct smk_net6addr *new)
1358 struct smk_net6addr *m_next;
1359 struct smk_net6addr *m;
1361 if (list_empty(&smk_net6addr_list)) {
1362 list_add_rcu(&new->list, &smk_net6addr_list);
1366 m = list_entry_rcu(smk_net6addr_list.next,
1367 struct smk_net6addr, list);
1369 if (new->smk_masks > m->smk_masks) {
1370 list_add_rcu(&new->list, &smk_net6addr_list);
1374 list_for_each_entry_rcu(m, &smk_net6addr_list, list) {
1375 if (list_is_last(&m->list, &smk_net6addr_list)) {
1376 list_add_rcu(&new->list, &m->list);
1379 m_next = list_entry_rcu(m->list.next,
1380 struct smk_net6addr, list);
1381 if (new->smk_masks > m_next->smk_masks) {
1382 list_add_rcu(&new->list, &m->list);
1390 * smk_write_net6addr - write() for /smack/netlabel
1391 * @file: file pointer, not actually used
1392 * @buf: where to get the data from
1393 * @count: bytes sent
1394 * @ppos: where to start
1396 * Accepts only one net6addr per write call.
1397 * Returns number of bytes written or error code, as appropriate
1399 static ssize_t smk_write_net6addr(struct file *file, const char __user *buf,
1400 size_t count, loff_t *ppos)
1402 struct smk_net6addr *snp;
1403 struct in6_addr newname;
1404 struct in6_addr fullmask;
1405 struct smack_known *skp = NULL;
1411 unsigned int scanned[8];
1413 unsigned int mask = 128;
1416 * Must have privilege.
1417 * No partial writes.
1418 * Enough data must be present.
1419 * "<addr/mask, as a:b:c:d:e:f:g:h/e><space><label>"
1420 * "<addr, as a:b:c:d:e:f:g:h><space><label>"
1422 if (!smack_privileged(CAP_MAC_ADMIN))
1426 if (count < SMK_NETLBLADDRMIN)
1429 data = memdup_user_nul(buf, count);
1431 return PTR_ERR(data);
1433 smack = kzalloc(count + 1, GFP_KERNEL);
1434 if (smack == NULL) {
1439 i = sscanf(data, "%x:%x:%x:%x:%x:%x:%x:%x/%u %s",
1440 &scanned[0], &scanned[1], &scanned[2], &scanned[3],
1441 &scanned[4], &scanned[5], &scanned[6], &scanned[7],
1444 i = sscanf(data, "%x:%x:%x:%x:%x:%x:%x:%x %s",
1445 &scanned[0], &scanned[1], &scanned[2],
1446 &scanned[3], &scanned[4], &scanned[5],
1447 &scanned[6], &scanned[7], smack);
1457 for (i = 0; i < 8; i++) {
1458 if (scanned[i] > 0xffff) {
1462 newname.s6_addr16[i] = htons(scanned[i]);
1466 * If smack begins with '-', it is an option, don't import it
1468 if (smack[0] != '-') {
1469 skp = smk_import_entry(smack, 0);
1476 * Only -DELETE is supported for IPv6
1478 if (strcmp(smack, SMACK_DELETE_OPTION) != 0) {
1484 for (i = 0, m = mask; i < 8; i++) {
1486 fullmask.s6_addr16[i] = 0xffff;
1489 fullmask.s6_addr16[i] = (1 << m) - 1;
1492 fullmask.s6_addr16[i] = 0;
1493 newname.s6_addr16[i] &= fullmask.s6_addr16[i];
1497 * Only allow one writer at a time. Writes should be
1498 * quite rare and small in any case.
1500 mutex_lock(&smk_net6addr_lock);
1502 * Try to find the prefix in the list
1504 list_for_each_entry_rcu(snp, &smk_net6addr_list, list) {
1505 if (mask != snp->smk_masks)
1507 for (found = 1, i = 0; i < 8; i++) {
1508 if (newname.s6_addr16[i] !=
1509 snp->smk_host.s6_addr16[i]) {
1518 snp = kzalloc(sizeof(*snp), GFP_KERNEL);
1522 snp->smk_host = newname;
1523 snp->smk_mask = fullmask;
1524 snp->smk_masks = mask;
1525 snp->smk_label = skp;
1526 smk_net6addr_insert(snp);
1529 snp->smk_label = skp;
1535 mutex_unlock(&smk_net6addr_lock);
1545 static const struct file_operations smk_net6addr_ops = {
1546 .open = smk_open_net6addr,
1548 .llseek = seq_lseek,
1549 .write = smk_write_net6addr,
1550 .release = seq_release,
1552 #endif /* CONFIG_IPV6 */
1555 * smk_read_doi - read() for /smack/doi
1556 * @filp: file pointer, not actually used
1557 * @buf: where to put the result
1558 * @count: maximum to send along
1559 * @ppos: where to start
1561 * Returns number of bytes read or error code, as appropriate
1563 static ssize_t smk_read_doi(struct file *filp, char __user *buf,
1564 size_t count, loff_t *ppos)
1572 sprintf(temp, "%d", smk_cipso_doi_value);
1573 rc = simple_read_from_buffer(buf, count, ppos, temp, strlen(temp));
1579 * smk_write_doi - write() for /smack/doi
1580 * @file: file pointer, not actually used
1581 * @buf: where to get the data from
1582 * @count: bytes sent
1583 * @ppos: where to start
1585 * Returns number of bytes written or error code, as appropriate
1587 static ssize_t smk_write_doi(struct file *file, const char __user *buf,
1588 size_t count, loff_t *ppos)
1593 if (!smack_privileged(CAP_MAC_ADMIN))
1596 if (count >= sizeof(temp) || count == 0)
1599 if (copy_from_user(temp, buf, count) != 0)
1604 if (sscanf(temp, "%d", &i) != 1)
1607 smk_cipso_doi_value = i;
1614 static const struct file_operations smk_doi_ops = {
1615 .read = smk_read_doi,
1616 .write = smk_write_doi,
1617 .llseek = default_llseek,
1621 * smk_read_direct - read() for /smack/direct
1622 * @filp: file pointer, not actually used
1623 * @buf: where to put the result
1624 * @count: maximum to send along
1625 * @ppos: where to start
1627 * Returns number of bytes read or error code, as appropriate
1629 static ssize_t smk_read_direct(struct file *filp, char __user *buf,
1630 size_t count, loff_t *ppos)
1638 sprintf(temp, "%d", smack_cipso_direct);
1639 rc = simple_read_from_buffer(buf, count, ppos, temp, strlen(temp));
1645 * smk_write_direct - write() for /smack/direct
1646 * @file: file pointer, not actually used
1647 * @buf: where to get the data from
1648 * @count: bytes sent
1649 * @ppos: where to start
1651 * Returns number of bytes written or error code, as appropriate
1653 static ssize_t smk_write_direct(struct file *file, const char __user *buf,
1654 size_t count, loff_t *ppos)
1656 struct smack_known *skp;
1660 if (!smack_privileged(CAP_MAC_ADMIN))
1663 if (count >= sizeof(temp) || count == 0)
1666 if (copy_from_user(temp, buf, count) != 0)
1671 if (sscanf(temp, "%d", &i) != 1)
1675 * Don't do anything if the value hasn't actually changed.
1676 * If it is changing reset the level on entries that were
1677 * set up to be direct when they were created.
1679 if (smack_cipso_direct != i) {
1680 mutex_lock(&smack_known_lock);
1681 list_for_each_entry_rcu(skp, &smack_known_list, list)
1682 if (skp->smk_netlabel.attr.mls.lvl ==
1684 skp->smk_netlabel.attr.mls.lvl = i;
1685 smack_cipso_direct = i;
1686 mutex_unlock(&smack_known_lock);
1692 static const struct file_operations smk_direct_ops = {
1693 .read = smk_read_direct,
1694 .write = smk_write_direct,
1695 .llseek = default_llseek,
1699 * smk_read_mapped - read() for /smack/mapped
1700 * @filp: file pointer, not actually used
1701 * @buf: where to put the result
1702 * @count: maximum to send along
1703 * @ppos: where to start
1705 * Returns number of bytes read or error code, as appropriate
1707 static ssize_t smk_read_mapped(struct file *filp, char __user *buf,
1708 size_t count, loff_t *ppos)
1716 sprintf(temp, "%d", smack_cipso_mapped);
1717 rc = simple_read_from_buffer(buf, count, ppos, temp, strlen(temp));
1723 * smk_write_mapped - write() for /smack/mapped
1724 * @file: file pointer, not actually used
1725 * @buf: where to get the data from
1726 * @count: bytes sent
1727 * @ppos: where to start
1729 * Returns number of bytes written or error code, as appropriate
1731 static ssize_t smk_write_mapped(struct file *file, const char __user *buf,
1732 size_t count, loff_t *ppos)
1734 struct smack_known *skp;
1738 if (!smack_privileged(CAP_MAC_ADMIN))
1741 if (count >= sizeof(temp) || count == 0)
1744 if (copy_from_user(temp, buf, count) != 0)
1749 if (sscanf(temp, "%d", &i) != 1)
1753 * Don't do anything if the value hasn't actually changed.
1754 * If it is changing reset the level on entries that were
1755 * set up to be mapped when they were created.
1757 if (smack_cipso_mapped != i) {
1758 mutex_lock(&smack_known_lock);
1759 list_for_each_entry_rcu(skp, &smack_known_list, list)
1760 if (skp->smk_netlabel.attr.mls.lvl ==
1762 skp->smk_netlabel.attr.mls.lvl = i;
1763 smack_cipso_mapped = i;
1764 mutex_unlock(&smack_known_lock);
1770 static const struct file_operations smk_mapped_ops = {
1771 .read = smk_read_mapped,
1772 .write = smk_write_mapped,
1773 .llseek = default_llseek,
1777 * smk_read_ambient - read() for /smack/ambient
1778 * @filp: file pointer, not actually used
1779 * @buf: where to put the result
1780 * @cn: maximum to send along
1781 * @ppos: where to start
1783 * Returns number of bytes read or error code, as appropriate
1785 static ssize_t smk_read_ambient(struct file *filp, char __user *buf,
1786 size_t cn, loff_t *ppos)
1794 * Being careful to avoid a problem in the case where
1795 * smack_net_ambient gets changed in midstream.
1797 mutex_lock(&smack_ambient_lock);
1799 asize = strlen(smack_net_ambient->smk_known) + 1;
1802 rc = simple_read_from_buffer(buf, cn, ppos,
1803 smack_net_ambient->smk_known,
1808 mutex_unlock(&smack_ambient_lock);
1814 * smk_write_ambient - write() for /smack/ambient
1815 * @file: file pointer, not actually used
1816 * @buf: where to get the data from
1817 * @count: bytes sent
1818 * @ppos: where to start
1820 * Returns number of bytes written or error code, as appropriate
1822 static ssize_t smk_write_ambient(struct file *file, const char __user *buf,
1823 size_t count, loff_t *ppos)
1825 struct smack_known *skp;
1830 if (!smack_privileged(CAP_MAC_ADMIN))
1833 data = memdup_user_nul(buf, count);
1835 return PTR_ERR(data);
1837 skp = smk_import_entry(data, count);
1843 mutex_lock(&smack_ambient_lock);
1845 oldambient = smack_net_ambient->smk_known;
1846 smack_net_ambient = skp;
1847 smk_unlbl_ambient(oldambient);
1849 mutex_unlock(&smack_ambient_lock);
1856 static const struct file_operations smk_ambient_ops = {
1857 .read = smk_read_ambient,
1858 .write = smk_write_ambient,
1859 .llseek = default_llseek,
1863 * Seq_file operations for /smack/onlycap
1865 static void *onlycap_seq_start(struct seq_file *s, loff_t *pos)
1867 return smk_seq_start(s, pos, &smack_onlycap_list);
1870 static void *onlycap_seq_next(struct seq_file *s, void *v, loff_t *pos)
1872 return smk_seq_next(s, v, pos, &smack_onlycap_list);
1875 static int onlycap_seq_show(struct seq_file *s, void *v)
1877 struct list_head *list = v;
1878 struct smack_known_list_elem *sklep =
1879 list_entry_rcu(list, struct smack_known_list_elem, list);
1881 seq_puts(s, sklep->smk_label->smk_known);
1887 static const struct seq_operations onlycap_seq_ops = {
1888 .start = onlycap_seq_start,
1889 .next = onlycap_seq_next,
1890 .show = onlycap_seq_show,
1891 .stop = smk_seq_stop,
1894 static int smk_open_onlycap(struct inode *inode, struct file *file)
1896 return seq_open(file, &onlycap_seq_ops);
1900 * smk_list_swap_rcu - swap public list with a private one in RCU-safe way
1901 * The caller must hold appropriate mutex to prevent concurrent modifications
1902 * to the public list.
1903 * Private list is assumed to be not accessible to other threads yet.
1905 * @public: public list
1906 * @private: private list
1908 static void smk_list_swap_rcu(struct list_head *public,
1909 struct list_head *private)
1911 struct list_head *first, *last;
1913 if (list_empty(public)) {
1914 list_splice_init_rcu(private, public, synchronize_rcu);
1916 /* Remember public list before replacing it */
1917 first = public->next;
1918 last = public->prev;
1920 /* Publish private list in place of public in RCU-safe way */
1921 private->prev->next = public;
1922 private->next->prev = public;
1923 rcu_assign_pointer(public->next, private->next);
1924 public->prev = private->prev;
1928 /* When all readers are done with the old public list,
1929 * attach it in place of private */
1930 private->next = first;
1931 private->prev = last;
1932 first->prev = private;
1933 last->next = private;
1938 * smk_parse_label_list - parse list of Smack labels, separated by spaces
1940 * @data: the string to parse
1941 * @private: destination list
1943 * Returns zero on success or error code, as appropriate
1945 static int smk_parse_label_list(char *data, struct list_head *list)
1948 struct smack_known *skp;
1949 struct smack_known_list_elem *sklep;
1951 while ((tok = strsep(&data, " ")) != NULL) {
1955 skp = smk_import_entry(tok, 0);
1957 return PTR_ERR(skp);
1959 sklep = kzalloc(sizeof(*sklep), GFP_KERNEL);
1963 sklep->smk_label = skp;
1964 list_add(&sklep->list, list);
1971 * smk_destroy_label_list - destroy a list of smack_known_list_elem
1972 * @head: header pointer of the list to destroy
1974 void smk_destroy_label_list(struct list_head *list)
1976 struct smack_known_list_elem *sklep;
1977 struct smack_known_list_elem *sklep2;
1979 list_for_each_entry_safe(sklep, sklep2, list, list)
1982 INIT_LIST_HEAD(list);
1986 * smk_write_onlycap - write() for smackfs/onlycap
1987 * @file: file pointer, not actually used
1988 * @buf: where to get the data from
1989 * @count: bytes sent
1990 * @ppos: where to start
1992 * Returns number of bytes written or error code, as appropriate
1994 static ssize_t smk_write_onlycap(struct file *file, const char __user *buf,
1995 size_t count, loff_t *ppos)
1998 LIST_HEAD(list_tmp);
2001 if (!smack_privileged(CAP_MAC_ADMIN))
2004 data = memdup_user_nul(buf, count);
2006 return PTR_ERR(data);
2008 rc = smk_parse_label_list(data, &list_tmp);
2012 * Clear the smack_onlycap on invalid label errors. This means
2013 * that we can pass a null string to unset the onlycap value.
2015 * Importing will also reject a label beginning with '-',
2016 * so "-usecapabilities" will also work.
2018 * But do so only on invalid label, not on system errors.
2019 * The invalid label must be first to count as clearing attempt.
2021 if (!rc || (rc == -EINVAL && list_empty(&list_tmp))) {
2022 mutex_lock(&smack_onlycap_lock);
2023 smk_list_swap_rcu(&smack_onlycap_list, &list_tmp);
2024 mutex_unlock(&smack_onlycap_lock);
2028 smk_destroy_label_list(&list_tmp);
2033 static const struct file_operations smk_onlycap_ops = {
2034 .open = smk_open_onlycap,
2036 .write = smk_write_onlycap,
2037 .llseek = seq_lseek,
2038 .release = seq_release,
2041 #ifdef CONFIG_SECURITY_SMACK_BRINGUP
2043 * smk_read_unconfined - read() for smackfs/unconfined
2044 * @filp: file pointer, not actually used
2045 * @buf: where to put the result
2046 * @cn: maximum to send along
2047 * @ppos: where to start
2049 * Returns number of bytes read or error code, as appropriate
2051 static ssize_t smk_read_unconfined(struct file *filp, char __user *buf,
2052 size_t cn, loff_t *ppos)
2055 ssize_t rc = -EINVAL;
2061 if (smack_unconfined != NULL)
2062 smack = smack_unconfined->smk_known;
2064 asize = strlen(smack) + 1;
2067 rc = simple_read_from_buffer(buf, cn, ppos, smack, asize);
2073 * smk_write_unconfined - write() for smackfs/unconfined
2074 * @file: file pointer, not actually used
2075 * @buf: where to get the data from
2076 * @count: bytes sent
2077 * @ppos: where to start
2079 * Returns number of bytes written or error code, as appropriate
2081 static ssize_t smk_write_unconfined(struct file *file, const char __user *buf,
2082 size_t count, loff_t *ppos)
2085 struct smack_known *skp;
2088 if (!smack_privileged(CAP_MAC_ADMIN))
2091 data = memdup_user_nul(buf, count);
2093 return PTR_ERR(data);
2096 * Clear the smack_unconfined on invalid label errors. This means
2097 * that we can pass a null string to unset the unconfined value.
2099 * Importing will also reject a label beginning with '-',
2100 * so "-confine" will also work.
2102 * But do so only on invalid label, not on system errors.
2104 skp = smk_import_entry(data, count);
2105 if (PTR_ERR(skp) == -EINVAL)
2107 else if (IS_ERR(skp)) {
2112 smack_unconfined = skp;
2119 static const struct file_operations smk_unconfined_ops = {
2120 .read = smk_read_unconfined,
2121 .write = smk_write_unconfined,
2122 .llseek = default_llseek,
2124 #endif /* CONFIG_SECURITY_SMACK_BRINGUP */
2127 * smk_read_logging - read() for /smack/logging
2128 * @filp: file pointer, not actually used
2129 * @buf: where to put the result
2130 * @cn: maximum to send along
2131 * @ppos: where to start
2133 * Returns number of bytes read or error code, as appropriate
2135 static ssize_t smk_read_logging(struct file *filp, char __user *buf,
2136 size_t count, loff_t *ppos)
2144 sprintf(temp, "%d\n", log_policy);
2145 rc = simple_read_from_buffer(buf, count, ppos, temp, strlen(temp));
2150 * smk_write_logging - write() for /smack/logging
2151 * @file: file pointer, not actually used
2152 * @buf: where to get the data from
2153 * @count: bytes sent
2154 * @ppos: where to start
2156 * Returns number of bytes written or error code, as appropriate
2158 static ssize_t smk_write_logging(struct file *file, const char __user *buf,
2159 size_t count, loff_t *ppos)
2164 if (!smack_privileged(CAP_MAC_ADMIN))
2167 if (count >= sizeof(temp) || count == 0)
2170 if (copy_from_user(temp, buf, count) != 0)
2175 if (sscanf(temp, "%d", &i) != 1)
2185 static const struct file_operations smk_logging_ops = {
2186 .read = smk_read_logging,
2187 .write = smk_write_logging,
2188 .llseek = default_llseek,
2192 * Seq_file read operations for /smack/load-self
2195 static void *load_self_seq_start(struct seq_file *s, loff_t *pos)
2197 struct task_smack *tsp = smack_cred(current_cred());
2199 return smk_seq_start(s, pos, &tsp->smk_rules);
2202 static void *load_self_seq_next(struct seq_file *s, void *v, loff_t *pos)
2204 struct task_smack *tsp = smack_cred(current_cred());
2206 return smk_seq_next(s, v, pos, &tsp->smk_rules);
2209 static int load_self_seq_show(struct seq_file *s, void *v)
2211 struct list_head *list = v;
2212 struct smack_rule *srp =
2213 list_entry_rcu(list, struct smack_rule, list);
2215 smk_rule_show(s, srp, SMK_LABELLEN);
2220 static const struct seq_operations load_self_seq_ops = {
2221 .start = load_self_seq_start,
2222 .next = load_self_seq_next,
2223 .show = load_self_seq_show,
2224 .stop = smk_seq_stop,
2229 * smk_open_load_self - open() for /smack/load-self2
2230 * @inode: inode structure representing file
2231 * @file: "load" file pointer
2233 * For reading, use load_seq_* seq_file reading operations.
2235 static int smk_open_load_self(struct inode *inode, struct file *file)
2237 return seq_open(file, &load_self_seq_ops);
2241 * smk_write_load_self - write() for /smack/load-self
2242 * @file: file pointer, not actually used
2243 * @buf: where to get the data from
2244 * @count: bytes sent
2245 * @ppos: where to start - must be 0
2248 static ssize_t smk_write_load_self(struct file *file, const char __user *buf,
2249 size_t count, loff_t *ppos)
2251 struct task_smack *tsp = smack_cred(current_cred());
2253 return smk_write_rules_list(file, buf, count, ppos, &tsp->smk_rules,
2254 &tsp->smk_rules_lock, SMK_FIXED24_FMT);
2257 static const struct file_operations smk_load_self_ops = {
2258 .open = smk_open_load_self,
2260 .llseek = seq_lseek,
2261 .write = smk_write_load_self,
2262 .release = seq_release,
2266 * smk_user_access - handle access check transaction
2267 * @file: file pointer
2268 * @buf: data from user space
2269 * @count: bytes sent
2270 * @ppos: where to start - must be 0
2272 static ssize_t smk_user_access(struct file *file, const char __user *buf,
2273 size_t count, loff_t *ppos, int format)
2275 struct smack_parsed_rule rule;
2279 data = simple_transaction_get(file, buf, count);
2281 return PTR_ERR(data);
2283 if (format == SMK_FIXED24_FMT) {
2284 if (count < SMK_LOADLEN)
2286 res = smk_parse_rule(data, &rule, 0);
2289 * simple_transaction_get() returns null-terminated data
2291 res = smk_parse_long_rule(data, &rule, 0, 3);
2295 res = smk_access(rule.smk_subject, rule.smk_object,
2296 rule.smk_access1, NULL);
2297 else if (res != -ENOENT)
2301 * smk_access() can return a value > 0 in the "bringup" case.
2303 data[0] = res >= 0 ? '1' : '0';
2306 simple_transaction_set(file, 2);
2308 if (format == SMK_FIXED24_FMT)
2314 * smk_write_access - handle access check transaction
2315 * @file: file pointer
2316 * @buf: data from user space
2317 * @count: bytes sent
2318 * @ppos: where to start - must be 0
2320 static ssize_t smk_write_access(struct file *file, const char __user *buf,
2321 size_t count, loff_t *ppos)
2323 return smk_user_access(file, buf, count, ppos, SMK_FIXED24_FMT);
2326 static const struct file_operations smk_access_ops = {
2327 .write = smk_write_access,
2328 .read = simple_transaction_read,
2329 .release = simple_transaction_release,
2330 .llseek = generic_file_llseek,
2335 * Seq_file read operations for /smack/load2
2338 static int load2_seq_show(struct seq_file *s, void *v)
2340 struct list_head *list = v;
2341 struct smack_rule *srp;
2342 struct smack_known *skp =
2343 list_entry_rcu(list, struct smack_known, list);
2345 list_for_each_entry_rcu(srp, &skp->smk_rules, list)
2346 smk_rule_show(s, srp, SMK_LONGLABEL);
2351 static const struct seq_operations load2_seq_ops = {
2352 .start = load2_seq_start,
2353 .next = load2_seq_next,
2354 .show = load2_seq_show,
2355 .stop = smk_seq_stop,
2359 * smk_open_load2 - open() for /smack/load2
2360 * @inode: inode structure representing file
2361 * @file: "load2" file pointer
2363 * For reading, use load2_seq_* seq_file reading operations.
2365 static int smk_open_load2(struct inode *inode, struct file *file)
2367 return seq_open(file, &load2_seq_ops);
2371 * smk_write_load2 - write() for /smack/load2
2372 * @file: file pointer, not actually used
2373 * @buf: where to get the data from
2374 * @count: bytes sent
2375 * @ppos: where to start - must be 0
2378 static ssize_t smk_write_load2(struct file *file, const char __user *buf,
2379 size_t count, loff_t *ppos)
2382 * Must have privilege.
2384 if (!smack_privileged(CAP_MAC_ADMIN))
2387 return smk_write_rules_list(file, buf, count, ppos, NULL, NULL,
2391 static const struct file_operations smk_load2_ops = {
2392 .open = smk_open_load2,
2394 .llseek = seq_lseek,
2395 .write = smk_write_load2,
2396 .release = seq_release,
2400 * Seq_file read operations for /smack/load-self2
2403 static void *load_self2_seq_start(struct seq_file *s, loff_t *pos)
2405 struct task_smack *tsp = smack_cred(current_cred());
2407 return smk_seq_start(s, pos, &tsp->smk_rules);
2410 static void *load_self2_seq_next(struct seq_file *s, void *v, loff_t *pos)
2412 struct task_smack *tsp = smack_cred(current_cred());
2414 return smk_seq_next(s, v, pos, &tsp->smk_rules);
2417 static int load_self2_seq_show(struct seq_file *s, void *v)
2419 struct list_head *list = v;
2420 struct smack_rule *srp =
2421 list_entry_rcu(list, struct smack_rule, list);
2423 smk_rule_show(s, srp, SMK_LONGLABEL);
2428 static const struct seq_operations load_self2_seq_ops = {
2429 .start = load_self2_seq_start,
2430 .next = load_self2_seq_next,
2431 .show = load_self2_seq_show,
2432 .stop = smk_seq_stop,
2436 * smk_open_load_self2 - open() for /smack/load-self2
2437 * @inode: inode structure representing file
2438 * @file: "load" file pointer
2440 * For reading, use load_seq_* seq_file reading operations.
2442 static int smk_open_load_self2(struct inode *inode, struct file *file)
2444 return seq_open(file, &load_self2_seq_ops);
2448 * smk_write_load_self2 - write() for /smack/load-self2
2449 * @file: file pointer, not actually used
2450 * @buf: where to get the data from
2451 * @count: bytes sent
2452 * @ppos: where to start - must be 0
2455 static ssize_t smk_write_load_self2(struct file *file, const char __user *buf,
2456 size_t count, loff_t *ppos)
2458 struct task_smack *tsp = smack_cred(current_cred());
2460 return smk_write_rules_list(file, buf, count, ppos, &tsp->smk_rules,
2461 &tsp->smk_rules_lock, SMK_LONG_FMT);
2464 static const struct file_operations smk_load_self2_ops = {
2465 .open = smk_open_load_self2,
2467 .llseek = seq_lseek,
2468 .write = smk_write_load_self2,
2469 .release = seq_release,
2473 * smk_write_access2 - handle access check transaction
2474 * @file: file pointer
2475 * @buf: data from user space
2476 * @count: bytes sent
2477 * @ppos: where to start - must be 0
2479 static ssize_t smk_write_access2(struct file *file, const char __user *buf,
2480 size_t count, loff_t *ppos)
2482 return smk_user_access(file, buf, count, ppos, SMK_LONG_FMT);
2485 static const struct file_operations smk_access2_ops = {
2486 .write = smk_write_access2,
2487 .read = simple_transaction_read,
2488 .release = simple_transaction_release,
2489 .llseek = generic_file_llseek,
2493 * smk_write_revoke_subj - write() for /smack/revoke-subject
2494 * @file: file pointer
2495 * @buf: data from user space
2496 * @count: bytes sent
2497 * @ppos: where to start - must be 0
2499 static ssize_t smk_write_revoke_subj(struct file *file, const char __user *buf,
2500 size_t count, loff_t *ppos)
2504 struct smack_known *skp;
2505 struct smack_rule *sp;
2506 struct list_head *rule_list;
2507 struct mutex *rule_lock;
2513 if (!smack_privileged(CAP_MAC_ADMIN))
2516 if (count == 0 || count > SMK_LONGLABEL)
2519 data = memdup_user(buf, count);
2521 return PTR_ERR(data);
2523 cp = smk_parse_smack(data, count);
2529 skp = smk_find_entry(cp);
2533 rule_list = &skp->smk_rules;
2534 rule_lock = &skp->smk_rules_lock;
2536 mutex_lock(rule_lock);
2538 list_for_each_entry_rcu(sp, rule_list, list)
2541 mutex_unlock(rule_lock);
2551 static const struct file_operations smk_revoke_subj_ops = {
2552 .write = smk_write_revoke_subj,
2553 .read = simple_transaction_read,
2554 .release = simple_transaction_release,
2555 .llseek = generic_file_llseek,
2559 * smk_init_sysfs - initialize /sys/fs/smackfs
2562 static int smk_init_sysfs(void)
2564 return sysfs_create_mount_point(fs_kobj, "smackfs");
2568 * smk_write_change_rule - write() for /smack/change-rule
2569 * @file: file pointer
2570 * @buf: data from user space
2571 * @count: bytes sent
2572 * @ppos: where to start - must be 0
2574 static ssize_t smk_write_change_rule(struct file *file, const char __user *buf,
2575 size_t count, loff_t *ppos)
2578 * Must have privilege.
2580 if (!smack_privileged(CAP_MAC_ADMIN))
2583 return smk_write_rules_list(file, buf, count, ppos, NULL, NULL,
2587 static const struct file_operations smk_change_rule_ops = {
2588 .write = smk_write_change_rule,
2589 .read = simple_transaction_read,
2590 .release = simple_transaction_release,
2591 .llseek = generic_file_llseek,
2595 * smk_read_syslog - read() for smackfs/syslog
2596 * @filp: file pointer, not actually used
2597 * @buf: where to put the result
2598 * @cn: maximum to send along
2599 * @ppos: where to start
2601 * Returns number of bytes read or error code, as appropriate
2603 static ssize_t smk_read_syslog(struct file *filp, char __user *buf,
2604 size_t cn, loff_t *ppos)
2606 struct smack_known *skp;
2607 ssize_t rc = -EINVAL;
2613 if (smack_syslog_label == NULL)
2614 skp = &smack_known_star;
2616 skp = smack_syslog_label;
2618 asize = strlen(skp->smk_known) + 1;
2621 rc = simple_read_from_buffer(buf, cn, ppos, skp->smk_known,
2628 * smk_write_syslog - write() for smackfs/syslog
2629 * @file: file pointer, not actually used
2630 * @buf: where to get the data from
2631 * @count: bytes sent
2632 * @ppos: where to start
2634 * Returns number of bytes written or error code, as appropriate
2636 static ssize_t smk_write_syslog(struct file *file, const char __user *buf,
2637 size_t count, loff_t *ppos)
2640 struct smack_known *skp;
2643 if (!smack_privileged(CAP_MAC_ADMIN))
2646 data = memdup_user_nul(buf, count);
2648 return PTR_ERR(data);
2650 skp = smk_import_entry(data, count);
2654 smack_syslog_label = skp;
2660 static const struct file_operations smk_syslog_ops = {
2661 .read = smk_read_syslog,
2662 .write = smk_write_syslog,
2663 .llseek = default_llseek,
2667 * Seq_file read operations for /smack/relabel-self
2670 static void *relabel_self_seq_start(struct seq_file *s, loff_t *pos)
2672 struct task_smack *tsp = smack_cred(current_cred());
2674 return smk_seq_start(s, pos, &tsp->smk_relabel);
2677 static void *relabel_self_seq_next(struct seq_file *s, void *v, loff_t *pos)
2679 struct task_smack *tsp = smack_cred(current_cred());
2681 return smk_seq_next(s, v, pos, &tsp->smk_relabel);
2684 static int relabel_self_seq_show(struct seq_file *s, void *v)
2686 struct list_head *list = v;
2687 struct smack_known_list_elem *sklep =
2688 list_entry(list, struct smack_known_list_elem, list);
2690 seq_puts(s, sklep->smk_label->smk_known);
2696 static const struct seq_operations relabel_self_seq_ops = {
2697 .start = relabel_self_seq_start,
2698 .next = relabel_self_seq_next,
2699 .show = relabel_self_seq_show,
2700 .stop = smk_seq_stop,
2704 * smk_open_relabel_self - open() for /smack/relabel-self
2705 * @inode: inode structure representing file
2706 * @file: "relabel-self" file pointer
2708 * Connect our relabel_self_seq_* operations with /smack/relabel-self
2711 static int smk_open_relabel_self(struct inode *inode, struct file *file)
2713 return seq_open(file, &relabel_self_seq_ops);
2717 * smk_write_relabel_self - write() for /smack/relabel-self
2718 * @file: file pointer, not actually used
2719 * @buf: where to get the data from
2720 * @count: bytes sent
2721 * @ppos: where to start - must be 0
2724 static ssize_t smk_write_relabel_self(struct file *file, const char __user *buf,
2725 size_t count, loff_t *ppos)
2729 LIST_HEAD(list_tmp);
2732 * Must have privilege.
2734 if (!smack_privileged(CAP_MAC_ADMIN))
2738 * Enough data must be present.
2743 data = memdup_user_nul(buf, count);
2745 return PTR_ERR(data);
2747 rc = smk_parse_label_list(data, &list_tmp);
2750 if (!rc || (rc == -EINVAL && list_empty(&list_tmp))) {
2752 struct task_smack *tsp;
2754 new = prepare_creds();
2759 tsp = smack_cred(new);
2760 smk_destroy_label_list(&tsp->smk_relabel);
2761 list_splice(&list_tmp, &tsp->smk_relabel);
2766 smk_destroy_label_list(&list_tmp);
2770 static const struct file_operations smk_relabel_self_ops = {
2771 .open = smk_open_relabel_self,
2773 .llseek = seq_lseek,
2774 .write = smk_write_relabel_self,
2775 .release = seq_release,
2779 * smk_read_ptrace - read() for /smack/ptrace
2780 * @filp: file pointer, not actually used
2781 * @buf: where to put the result
2782 * @count: maximum to send along
2783 * @ppos: where to start
2785 * Returns number of bytes read or error code, as appropriate
2787 static ssize_t smk_read_ptrace(struct file *filp, char __user *buf,
2788 size_t count, loff_t *ppos)
2796 sprintf(temp, "%d\n", smack_ptrace_rule);
2797 rc = simple_read_from_buffer(buf, count, ppos, temp, strlen(temp));
2802 * smk_write_ptrace - write() for /smack/ptrace
2803 * @file: file pointer
2804 * @buf: data from user space
2805 * @count: bytes sent
2806 * @ppos: where to start - must be 0
2808 static ssize_t smk_write_ptrace(struct file *file, const char __user *buf,
2809 size_t count, loff_t *ppos)
2814 if (!smack_privileged(CAP_MAC_ADMIN))
2817 if (*ppos != 0 || count >= sizeof(temp) || count == 0)
2820 if (copy_from_user(temp, buf, count) != 0)
2825 if (sscanf(temp, "%d", &i) != 1)
2827 if (i < SMACK_PTRACE_DEFAULT || i > SMACK_PTRACE_MAX)
2829 smack_ptrace_rule = i;
2834 static const struct file_operations smk_ptrace_ops = {
2835 .write = smk_write_ptrace,
2836 .read = smk_read_ptrace,
2837 .llseek = default_llseek,
2841 * smk_fill_super - fill the smackfs superblock
2842 * @sb: the empty superblock
2845 * Fill in the well known entries for the smack filesystem
2847 * Returns 0 on success, an error code on failure
2849 static int smk_fill_super(struct super_block *sb, struct fs_context *fc)
2853 static const struct tree_descr smack_files[] = {
2855 "load", &smk_load_ops, S_IRUGO|S_IWUSR},
2857 "cipso", &smk_cipso_ops, S_IRUGO|S_IWUSR},
2859 "doi", &smk_doi_ops, S_IRUGO|S_IWUSR},
2861 "direct", &smk_direct_ops, S_IRUGO|S_IWUSR},
2863 "ambient", &smk_ambient_ops, S_IRUGO|S_IWUSR},
2865 "netlabel", &smk_net4addr_ops, S_IRUGO|S_IWUSR},
2867 "onlycap", &smk_onlycap_ops, S_IRUGO|S_IWUSR},
2869 "logging", &smk_logging_ops, S_IRUGO|S_IWUSR},
2871 "load-self", &smk_load_self_ops, S_IRUGO|S_IWUGO},
2873 "access", &smk_access_ops, S_IRUGO|S_IWUGO},
2875 "mapped", &smk_mapped_ops, S_IRUGO|S_IWUSR},
2877 "load2", &smk_load2_ops, S_IRUGO|S_IWUSR},
2878 [SMK_LOAD_SELF2] = {
2879 "load-self2", &smk_load_self2_ops, S_IRUGO|S_IWUGO},
2881 "access2", &smk_access2_ops, S_IRUGO|S_IWUGO},
2883 "cipso2", &smk_cipso2_ops, S_IRUGO|S_IWUSR},
2884 [SMK_REVOKE_SUBJ] = {
2885 "revoke-subject", &smk_revoke_subj_ops,
2887 [SMK_CHANGE_RULE] = {
2888 "change-rule", &smk_change_rule_ops, S_IRUGO|S_IWUSR},
2890 "syslog", &smk_syslog_ops, S_IRUGO|S_IWUSR},
2892 "ptrace", &smk_ptrace_ops, S_IRUGO|S_IWUSR},
2893 #ifdef CONFIG_SECURITY_SMACK_BRINGUP
2894 [SMK_UNCONFINED] = {
2895 "unconfined", &smk_unconfined_ops, S_IRUGO|S_IWUSR},
2897 #if IS_ENABLED(CONFIG_IPV6)
2899 "ipv6host", &smk_net6addr_ops, S_IRUGO|S_IWUSR},
2900 #endif /* CONFIG_IPV6 */
2901 [SMK_RELABEL_SELF] = {
2902 "relabel-self", &smk_relabel_self_ops,
2908 rc = simple_fill_super(sb, SMACK_MAGIC, smack_files);
2910 printk(KERN_ERR "%s failed %d while creating inodes\n",
2919 * smk_get_tree - get the smackfs superblock
2920 * @fc: The mount context, including any options
2922 * Just passes everything along.
2924 * Returns what the lower level code does.
2926 static int smk_get_tree(struct fs_context *fc)
2928 return get_tree_single(fc, smk_fill_super);
2931 static const struct fs_context_operations smk_context_ops = {
2932 .get_tree = smk_get_tree,
2936 * smk_init_fs_context - Initialise a filesystem context for smackfs
2937 * @fc: The blank mount context
2939 static int smk_init_fs_context(struct fs_context *fc)
2941 fc->ops = &smk_context_ops;
2945 static struct file_system_type smk_fs_type = {
2947 .init_fs_context = smk_init_fs_context,
2948 .kill_sb = kill_litter_super,
2951 static struct vfsmount *smackfs_mount;
2953 static int __init smk_preset_netlabel(struct smack_known *skp)
2955 skp->smk_netlabel.domain = skp->smk_known;
2956 skp->smk_netlabel.flags =
2957 NETLBL_SECATTR_DOMAIN | NETLBL_SECATTR_MLS_LVL;
2958 return smk_netlbl_mls(smack_cipso_direct, skp->smk_known,
2959 &skp->smk_netlabel, strlen(skp->smk_known));
2963 * init_smk_fs - get the smackfs superblock
2965 * register the smackfs
2967 * Do not register smackfs if Smack wasn't enabled
2968 * on boot. We can not put this method normally under the
2969 * smack_init() code path since the security subsystem get
2970 * initialized before the vfs caches.
2972 * Returns true if we were not chosen on boot or if
2973 * we were chosen and filesystem registration succeeded.
2975 static int __init init_smk_fs(void)
2980 if (smack_enabled == 0)
2983 err = smk_init_sysfs();
2985 printk(KERN_ERR "smackfs: sysfs mountpoint problem.\n");
2987 err = register_filesystem(&smk_fs_type);
2989 smackfs_mount = kern_mount(&smk_fs_type);
2990 if (IS_ERR(smackfs_mount)) {
2991 printk(KERN_ERR "smackfs: could not mount!\n");
2992 err = PTR_ERR(smackfs_mount);
2993 smackfs_mount = NULL;
2998 smk_unlbl_ambient(NULL);
3000 rc = smk_preset_netlabel(&smack_known_floor);
3001 if (err == 0 && rc < 0)
3003 rc = smk_preset_netlabel(&smack_known_hat);
3004 if (err == 0 && rc < 0)
3006 rc = smk_preset_netlabel(&smack_known_huh);
3007 if (err == 0 && rc < 0)
3009 rc = smk_preset_netlabel(&smack_known_star);
3010 if (err == 0 && rc < 0)
3012 rc = smk_preset_netlabel(&smack_known_web);
3013 if (err == 0 && rc < 0)
3019 __initcall(init_smk_fs);