2 * Copyright (C) 2007 Casey Schaufler <casey@schaufler-ca.com>
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation, version 2.
9 * Casey Schaufler <casey@schaufler-ca.com>
10 * Ahmed S. Darwish <darwish.07@gmail.com>
12 * Special thanks to the authors of selinuxfs.
14 * Karl MacMillan <kmacmillan@tresys.com>
15 * James Morris <jmorris@redhat.com>
19 #include <linux/kernel.h>
20 #include <linux/vmalloc.h>
21 #include <linux/security.h>
22 #include <linux/mutex.h>
23 #include <linux/slab.h>
24 #include <net/net_namespace.h>
25 #include <net/cipso_ipv4.h>
26 #include <linux/seq_file.h>
27 #include <linux/ctype.h>
28 #include <linux/audit.h>
29 #include <linux/magic.h>
32 #define BEBITS (sizeof(__be32) * 8)
34 * smackfs pseudo filesystem.
39 SMK_LOAD = 3, /* load policy */
40 SMK_CIPSO = 4, /* load label -> CIPSO mapping */
41 SMK_DOI = 5, /* CIPSO DOI */
42 SMK_DIRECT = 6, /* CIPSO level indicating direct label */
43 SMK_AMBIENT = 7, /* internet ambient label */
44 SMK_NET4ADDR = 8, /* single label hosts */
45 SMK_ONLYCAP = 9, /* the only "capable" label */
46 SMK_LOGGING = 10, /* logging */
47 SMK_LOAD_SELF = 11, /* task specific rules */
48 SMK_ACCESSES = 12, /* access policy */
49 SMK_MAPPED = 13, /* CIPSO level indicating mapped label */
50 SMK_LOAD2 = 14, /* load policy with long labels */
51 SMK_LOAD_SELF2 = 15, /* load task specific rules with long labels */
52 SMK_ACCESS2 = 16, /* make an access check with long labels */
53 SMK_CIPSO2 = 17, /* load long label -> CIPSO mapping */
54 SMK_REVOKE_SUBJ = 18, /* set rules with subject label to '-' */
55 SMK_CHANGE_RULE = 19, /* change or add rules (long labels) */
56 SMK_SYSLOG = 20, /* change syslog label) */
57 SMK_PTRACE = 21, /* set ptrace rule */
58 #ifdef CONFIG_SECURITY_SMACK_BRINGUP
59 SMK_UNCONFINED = 22, /* define an unconfined label */
61 #if IS_ENABLED(CONFIG_IPV6)
62 SMK_NET6ADDR = 23, /* single label IPv6 hosts */
63 #endif /* CONFIG_IPV6 */
64 SMK_RELABEL_SELF = 24, /* relabel possible without CAP_MAC_ADMIN */
70 static DEFINE_MUTEX(smack_cipso_lock);
71 static DEFINE_MUTEX(smack_ambient_lock);
72 static DEFINE_MUTEX(smk_net4addr_lock);
73 #if IS_ENABLED(CONFIG_IPV6)
74 static DEFINE_MUTEX(smk_net6addr_lock);
75 #endif /* CONFIG_IPV6 */
78 * This is the "ambient" label for network traffic.
79 * If it isn't somehow marked, use this.
80 * It can be reset via smackfs/ambient
82 struct smack_known *smack_net_ambient;
85 * This is the level in a CIPSO header that indicates a
86 * smack label is contained directly in the category set.
87 * It can be reset via smackfs/direct
89 int smack_cipso_direct = SMACK_CIPSO_DIRECT_DEFAULT;
92 * This is the level in a CIPSO header that indicates a
93 * secid is contained directly in the category set.
94 * It can be reset via smackfs/mapped
96 int smack_cipso_mapped = SMACK_CIPSO_MAPPED_DEFAULT;
98 #ifdef CONFIG_SECURITY_SMACK_BRINGUP
100 * Allow one label to be unconfined. This is for
101 * debugging and application bring-up purposes only.
102 * It is bad and wrong, but everyone seems to expect
105 struct smack_known *smack_unconfined;
109 * If this value is set restrict syslog use to the label specified.
110 * It can be reset via smackfs/syslog
112 struct smack_known *smack_syslog_label;
115 * Ptrace current rule
116 * SMACK_PTRACE_DEFAULT regular smack ptrace rules (/proc based)
117 * SMACK_PTRACE_EXACT labels must match, but can be overriden with
119 * SMACK_PTRACE_DRACONIAN lables must match, CAP_SYS_PTRACE has no effect
121 int smack_ptrace_rule = SMACK_PTRACE_DEFAULT;
124 * Certain IP addresses may be designated as single label hosts.
125 * Packets are sent there unlabeled, but only from tasks that
126 * can write to the specified label.
129 LIST_HEAD(smk_net4addr_list);
130 #if IS_ENABLED(CONFIG_IPV6)
131 LIST_HEAD(smk_net6addr_list);
132 #endif /* CONFIG_IPV6 */
135 * Rule lists are maintained for each label.
136 * This master list is just for reading /smack/load and /smack/load2.
138 struct smack_master_list {
139 struct list_head list;
140 struct smack_rule *smk_rule;
143 static LIST_HEAD(smack_rule_list);
145 struct smack_parsed_rule {
146 struct smack_known *smk_subject;
147 struct smack_known *smk_object;
152 static int smk_cipso_doi_value = SMACK_CIPSO_DOI_DEFAULT;
155 * Values for parsing cipso rules
156 * SMK_DIGITLEN: Length of a digit field in a rule.
157 * SMK_CIPSOMIN: Minimum possible cipso rule length.
158 * SMK_CIPSOMAX: Maximum possible cipso rule length.
160 #define SMK_DIGITLEN 4
161 #define SMK_CIPSOMIN (SMK_LABELLEN + 2 * SMK_DIGITLEN)
162 #define SMK_CIPSOMAX (SMK_CIPSOMIN + SMACK_CIPSO_MAXCATNUM * SMK_DIGITLEN)
165 * Values for parsing MAC rules
166 * SMK_ACCESS: Maximum possible combination of access permissions
167 * SMK_ACCESSLEN: Maximum length for a rule access field
168 * SMK_LOADLEN: Smack rule length
170 #define SMK_OACCESS "rwxa"
171 #define SMK_ACCESS "rwxatl"
172 #define SMK_OACCESSLEN (sizeof(SMK_OACCESS) - 1)
173 #define SMK_ACCESSLEN (sizeof(SMK_ACCESS) - 1)
174 #define SMK_OLOADLEN (SMK_LABELLEN + SMK_LABELLEN + SMK_OACCESSLEN)
175 #define SMK_LOADLEN (SMK_LABELLEN + SMK_LABELLEN + SMK_ACCESSLEN)
178 * Stricly for CIPSO level manipulation.
179 * Set the category bit number in a smack label sized buffer.
181 static inline void smack_catset_bit(unsigned int cat, char *catsetp)
183 if (cat == 0 || cat > (SMK_CIPSOLEN * 8))
186 catsetp[(cat - 1) / 8] |= 0x80 >> ((cat - 1) % 8);
190 * smk_netlabel_audit_set - fill a netlbl_audit struct
191 * @nap: structure to fill
193 static void smk_netlabel_audit_set(struct netlbl_audit *nap)
195 struct smack_known *skp = smk_of_current();
197 nap->loginuid = audit_get_loginuid(current);
198 nap->sessionid = audit_get_sessionid(current);
199 nap->secid = skp->smk_secid;
203 * Value for parsing single label host rules
206 #define SMK_NETLBLADDRMIN 9
209 * smk_set_access - add a rule to the rule list or replace an old rule
210 * @srp: the rule to add or replace
211 * @rule_list: the list of rules
212 * @rule_lock: the rule list lock
213 * @global: if non-zero, indicates a global rule
215 * Looks through the current subject/object/access list for
216 * the subject/object pair and replaces the access that was
217 * there. If the pair isn't found add it with the specified
220 * Returns 0 if nothing goes wrong or -ENOMEM if it fails
221 * during the allocation of the new pair to add.
223 static int smk_set_access(struct smack_parsed_rule *srp,
224 struct list_head *rule_list,
225 struct mutex *rule_lock, int global)
227 struct smack_rule *sp;
228 struct smack_master_list *smlp;
232 mutex_lock(rule_lock);
235 * Because the object label is less likely to match
236 * than the subject label check it first
238 list_for_each_entry_rcu(sp, rule_list, list) {
239 if (sp->smk_object == srp->smk_object &&
240 sp->smk_subject == srp->smk_subject) {
242 sp->smk_access |= srp->smk_access1;
243 sp->smk_access &= ~srp->smk_access2;
249 sp = kzalloc(sizeof(*sp), GFP_KERNEL);
255 sp->smk_subject = srp->smk_subject;
256 sp->smk_object = srp->smk_object;
257 sp->smk_access = srp->smk_access1 & ~srp->smk_access2;
259 list_add_rcu(&sp->list, rule_list);
261 * If this is a global as opposed to self and a new rule
262 * it needs to get added for reporting.
265 smlp = kzalloc(sizeof(*smlp), GFP_KERNEL);
268 list_add_rcu(&smlp->list, &smack_rule_list);
275 mutex_unlock(rule_lock);
280 * smk_perm_from_str - parse smack accesses from a text string
281 * @string: a text string that contains a Smack accesses code
283 * Returns an integer with respective bits set for specified accesses.
285 static int smk_perm_from_str(const char *string)
290 for (cp = string; ; cp++)
312 perm |= MAY_TRANSMUTE;
328 * smk_fill_rule - Fill Smack rule from strings
329 * @subject: subject label string
330 * @object: object label string
331 * @access1: access string
332 * @access2: string with permissions to be removed
334 * @import: if non-zero, import labels
335 * @len: label length limit
337 * Returns 0 on success, appropriate error code on failure.
339 static int smk_fill_rule(const char *subject, const char *object,
340 const char *access1, const char *access2,
341 struct smack_parsed_rule *rule, int import,
345 struct smack_known *skp;
348 rule->smk_subject = smk_import_entry(subject, len);
349 if (IS_ERR(rule->smk_subject))
350 return PTR_ERR(rule->smk_subject);
352 rule->smk_object = smk_import_entry(object, len);
353 if (IS_ERR(rule->smk_object))
354 return PTR_ERR(rule->smk_object);
356 cp = smk_parse_smack(subject, len);
359 skp = smk_find_entry(cp);
363 rule->smk_subject = skp;
365 cp = smk_parse_smack(object, len);
368 skp = smk_find_entry(cp);
372 rule->smk_object = skp;
375 rule->smk_access1 = smk_perm_from_str(access1);
377 rule->smk_access2 = smk_perm_from_str(access2);
379 rule->smk_access2 = ~rule->smk_access1;
385 * smk_parse_rule - parse Smack rule from load string
386 * @data: string to be parsed whose size is SMK_LOADLEN
388 * @import: if non-zero, import labels
390 * Returns 0 on success, -1 on errors.
392 static int smk_parse_rule(const char *data, struct smack_parsed_rule *rule,
397 rc = smk_fill_rule(data, data + SMK_LABELLEN,
398 data + SMK_LABELLEN + SMK_LABELLEN, NULL, rule,
399 import, SMK_LABELLEN);
404 * smk_parse_long_rule - parse Smack rule from rule string
405 * @data: string to be parsed, null terminated
406 * @rule: Will be filled with Smack parsed rule
407 * @import: if non-zero, import labels
408 * @tokens: numer of substrings expected in data
410 * Returns number of processed bytes on success, -ERRNO on failure.
412 static ssize_t smk_parse_long_rule(char *data, struct smack_parsed_rule *rule,
413 int import, int tokens)
421 * Parsing the rule in-place, filling all white-spaces with '\0'
423 for (i = 0; i < tokens; ++i) {
424 while (isspace(data[cnt]))
427 if (data[cnt] == '\0')
428 /* Unexpected end of data */
433 while (data[cnt] && !isspace(data[cnt]))
436 while (isspace(data[cnt]))
442 rc = smk_fill_rule(tok[0], tok[1], tok[2], tok[3], rule, import, 0);
443 return rc == 0 ? cnt : rc;
446 #define SMK_FIXED24_FMT 0 /* Fixed 24byte label format */
447 #define SMK_LONG_FMT 1 /* Variable long label format */
448 #define SMK_CHANGE_FMT 2 /* Rule modification format */
450 * smk_write_rules_list - write() for any /smack rule file
451 * @file: file pointer, not actually used
452 * @buf: where to get the data from
454 * @ppos: where to start - must be 0
455 * @rule_list: the list of rules to write to
456 * @rule_lock: lock for the rule list
457 * @format: /smack/load or /smack/load2 or /smack/change-rule format.
459 * Get one smack access rule from above.
460 * The format for SMK_LONG_FMT is:
461 * "subject<whitespace>object<whitespace>access[<whitespace>...]"
462 * The format for SMK_FIXED24_FMT is exactly:
463 * "subject object rwxat"
464 * The format for SMK_CHANGE_FMT is:
465 * "subject<whitespace>object<whitespace>
466 * acc_enable<whitespace>acc_disable[<whitespace>...]"
468 static ssize_t smk_write_rules_list(struct file *file, const char __user *buf,
469 size_t count, loff_t *ppos,
470 struct list_head *rule_list,
471 struct mutex *rule_lock, int format)
473 struct smack_parsed_rule rule;
482 * Enough data must be present.
487 if (format == SMK_FIXED24_FMT) {
489 * Minor hack for backward compatibility
491 if (count < SMK_OLOADLEN || count > SMK_LOADLEN)
494 if (count >= PAGE_SIZE) {
495 count = PAGE_SIZE - 1;
500 data = kmalloc(count + 1, GFP_KERNEL);
504 if (copy_from_user(data, buf, count) != 0) {
510 * In case of parsing only part of user buf,
511 * avoid having partial rule at the data buffer
514 while (count > 0 && (data[count - 1] != '\n'))
523 tokens = (format == SMK_CHANGE_FMT ? 4 : 3);
524 while (cnt < count) {
525 if (format == SMK_FIXED24_FMT) {
526 rc = smk_parse_rule(data, &rule, 1);
531 rc = smk_parse_long_rule(data + cnt, &rule, 1, tokens);
541 if (rule_list == NULL)
542 rc = smk_set_access(&rule, &rule.smk_subject->smk_rules,
543 &rule.smk_subject->smk_rules_lock, 1);
545 rc = smk_set_access(&rule, rule_list, rule_lock, 0);
558 * Core logic for smackfs seq list operations.
561 static void *smk_seq_start(struct seq_file *s, loff_t *pos,
562 struct list_head *head)
564 struct list_head *list;
568 for (list = rcu_dereference(list_next_rcu(head));
570 list = rcu_dereference(list_next_rcu(list))) {
578 static void *smk_seq_next(struct seq_file *s, void *v, loff_t *pos,
579 struct list_head *head)
581 struct list_head *list = v;
584 list = rcu_dereference(list_next_rcu(list));
586 return (list == head) ? NULL : list;
589 static void smk_seq_stop(struct seq_file *s, void *v)
594 static void smk_rule_show(struct seq_file *s, struct smack_rule *srp, int max)
597 * Don't show any rules with label names too long for
598 * interface file (/smack/load or /smack/load2)
599 * because you should expect to be able to write
600 * anything you read back.
602 if (strlen(srp->smk_subject->smk_known) >= max ||
603 strlen(srp->smk_object->smk_known) >= max)
606 if (srp->smk_access == 0)
609 seq_printf(s, "%s %s",
610 srp->smk_subject->smk_known,
611 srp->smk_object->smk_known);
615 if (srp->smk_access & MAY_READ)
617 if (srp->smk_access & MAY_WRITE)
619 if (srp->smk_access & MAY_EXEC)
621 if (srp->smk_access & MAY_APPEND)
623 if (srp->smk_access & MAY_TRANSMUTE)
625 if (srp->smk_access & MAY_LOCK)
627 if (srp->smk_access & MAY_BRINGUP)
634 * Seq_file read operations for /smack/load
637 static void *load2_seq_start(struct seq_file *s, loff_t *pos)
639 return smk_seq_start(s, pos, &smack_rule_list);
642 static void *load2_seq_next(struct seq_file *s, void *v, loff_t *pos)
644 return smk_seq_next(s, v, pos, &smack_rule_list);
647 static int load_seq_show(struct seq_file *s, void *v)
649 struct list_head *list = v;
650 struct smack_master_list *smlp =
651 list_entry_rcu(list, struct smack_master_list, list);
653 smk_rule_show(s, smlp->smk_rule, SMK_LABELLEN);
658 static const struct seq_operations load_seq_ops = {
659 .start = load2_seq_start,
660 .next = load2_seq_next,
661 .show = load_seq_show,
662 .stop = smk_seq_stop,
666 * smk_open_load - open() for /smack/load
667 * @inode: inode structure representing file
668 * @file: "load" file pointer
670 * For reading, use load_seq_* seq_file reading operations.
672 static int smk_open_load(struct inode *inode, struct file *file)
674 return seq_open(file, &load_seq_ops);
678 * smk_write_load - write() for /smack/load
679 * @file: file pointer, not actually used
680 * @buf: where to get the data from
682 * @ppos: where to start - must be 0
685 static ssize_t smk_write_load(struct file *file, const char __user *buf,
686 size_t count, loff_t *ppos)
689 * Must have privilege.
691 * Enough data must be present.
693 if (!smack_privileged(CAP_MAC_ADMIN))
696 return smk_write_rules_list(file, buf, count, ppos, NULL, NULL,
700 static const struct file_operations smk_load_ops = {
701 .open = smk_open_load,
704 .write = smk_write_load,
705 .release = seq_release,
709 * smk_cipso_doi - initialize the CIPSO domain
711 static void smk_cipso_doi(void)
714 struct cipso_v4_doi *doip;
715 struct netlbl_audit nai;
717 smk_netlabel_audit_set(&nai);
719 rc = netlbl_cfg_map_del(NULL, PF_INET, NULL, NULL, &nai);
721 printk(KERN_WARNING "%s:%d remove rc = %d\n",
722 __func__, __LINE__, rc);
724 doip = kmalloc(sizeof(struct cipso_v4_doi), GFP_KERNEL);
726 panic("smack: Failed to initialize cipso DOI.\n");
727 doip->map.std = NULL;
728 doip->doi = smk_cipso_doi_value;
729 doip->type = CIPSO_V4_MAP_PASS;
730 doip->tags[0] = CIPSO_V4_TAG_RBITMAP;
731 for (rc = 1; rc < CIPSO_V4_TAG_MAXCNT; rc++)
732 doip->tags[rc] = CIPSO_V4_TAG_INVALID;
734 rc = netlbl_cfg_cipsov4_add(doip, &nai);
736 printk(KERN_WARNING "%s:%d cipso add rc = %d\n",
737 __func__, __LINE__, rc);
741 rc = netlbl_cfg_cipsov4_map_add(doip->doi, NULL, NULL, NULL, &nai);
743 printk(KERN_WARNING "%s:%d map add rc = %d\n",
744 __func__, __LINE__, rc);
751 * smk_unlbl_ambient - initialize the unlabeled domain
752 * @oldambient: previous domain string
754 static void smk_unlbl_ambient(char *oldambient)
757 struct netlbl_audit nai;
759 smk_netlabel_audit_set(&nai);
761 if (oldambient != NULL) {
762 rc = netlbl_cfg_map_del(oldambient, PF_INET, NULL, NULL, &nai);
764 printk(KERN_WARNING "%s:%d remove rc = %d\n",
765 __func__, __LINE__, rc);
767 if (smack_net_ambient == NULL)
768 smack_net_ambient = &smack_known_floor;
770 rc = netlbl_cfg_unlbl_map_add(smack_net_ambient->smk_known, PF_INET,
773 printk(KERN_WARNING "%s:%d add rc = %d\n",
774 __func__, __LINE__, rc);
778 * Seq_file read operations for /smack/cipso
781 static void *cipso_seq_start(struct seq_file *s, loff_t *pos)
783 return smk_seq_start(s, pos, &smack_known_list);
786 static void *cipso_seq_next(struct seq_file *s, void *v, loff_t *pos)
788 return smk_seq_next(s, v, pos, &smack_known_list);
792 * Print cipso labels in format:
793 * label level[/cat[,cat]]
795 static int cipso_seq_show(struct seq_file *s, void *v)
797 struct list_head *list = v;
798 struct smack_known *skp =
799 list_entry_rcu(list, struct smack_known, list);
800 struct netlbl_lsm_catmap *cmp = skp->smk_netlabel.attr.mls.cat;
805 * Don't show a label that could not have been set using
806 * /smack/cipso. This is in support of the notion that
807 * anything read from /smack/cipso ought to be writeable
810 * /smack/cipso2 should be used instead.
812 if (strlen(skp->smk_known) >= SMK_LABELLEN)
815 seq_printf(s, "%s %3d", skp->smk_known, skp->smk_netlabel.attr.mls.lvl);
817 for (i = netlbl_catmap_walk(cmp, 0); i >= 0;
818 i = netlbl_catmap_walk(cmp, i + 1)) {
819 seq_printf(s, "%c%d", sep, i);
828 static const struct seq_operations cipso_seq_ops = {
829 .start = cipso_seq_start,
830 .next = cipso_seq_next,
831 .show = cipso_seq_show,
832 .stop = smk_seq_stop,
836 * smk_open_cipso - open() for /smack/cipso
837 * @inode: inode structure representing file
838 * @file: "cipso" file pointer
840 * Connect our cipso_seq_* operations with /smack/cipso
843 static int smk_open_cipso(struct inode *inode, struct file *file)
845 return seq_open(file, &cipso_seq_ops);
849 * smk_set_cipso - do the work for write() for cipso and cipso2
850 * @file: file pointer, not actually used
851 * @buf: where to get the data from
853 * @ppos: where to start
854 * @format: /smack/cipso or /smack/cipso2
856 * Accepts only one cipso rule per write call.
857 * Returns number of bytes written or error code, as appropriate
859 static ssize_t smk_set_cipso(struct file *file, const char __user *buf,
860 size_t count, loff_t *ppos, int format)
862 struct smack_known *skp;
863 struct netlbl_lsm_secattr ncats;
864 char mapcatset[SMK_CIPSOLEN];
868 ssize_t rc = -EINVAL;
875 * Must have privilege.
877 * Enough data must be present.
879 if (!smack_privileged(CAP_MAC_ADMIN))
883 if (format == SMK_FIXED24_FMT &&
884 (count < SMK_CIPSOMIN || count > SMK_CIPSOMAX))
887 data = kzalloc(count + 1, GFP_KERNEL);
891 if (copy_from_user(data, buf, count) != 0) {
899 * Only allow one writer at a time. Writes should be
900 * quite rare and small in any case.
902 mutex_lock(&smack_cipso_lock);
904 skp = smk_import_entry(rule, 0);
910 if (format == SMK_FIXED24_FMT)
911 rule += SMK_LABELLEN;
913 rule += strlen(skp->smk_known) + 1;
915 if (rule > data + count) {
920 ret = sscanf(rule, "%d", &maplevel);
921 if (ret != 1 || maplevel < 0 || maplevel > SMACK_CIPSO_MAXLEVEL)
924 rule += SMK_DIGITLEN;
925 if (rule > data + count) {
930 ret = sscanf(rule, "%d", &catlen);
931 if (ret != 1 || catlen > SMACK_CIPSO_MAXCATNUM)
934 if (format == SMK_FIXED24_FMT &&
935 count != (SMK_CIPSOMIN + catlen * SMK_DIGITLEN))
938 memset(mapcatset, 0, sizeof(mapcatset));
940 for (i = 0; i < catlen; i++) {
941 rule += SMK_DIGITLEN;
942 if (rule > data + count) {
946 ret = sscanf(rule, "%u", &cat);
947 if (ret != 1 || cat > SMACK_CIPSO_MAXCATNUM)
950 smack_catset_bit(cat, mapcatset);
953 rc = smk_netlbl_mls(maplevel, mapcatset, &ncats, SMK_CIPSOLEN);
955 netlbl_catmap_free(skp->smk_netlabel.attr.mls.cat);
956 skp->smk_netlabel.attr.mls.cat = ncats.attr.mls.cat;
957 skp->smk_netlabel.attr.mls.lvl = ncats.attr.mls.lvl;
962 mutex_unlock(&smack_cipso_lock);
969 * smk_write_cipso - write() for /smack/cipso
970 * @file: file pointer, not actually used
971 * @buf: where to get the data from
973 * @ppos: where to start
975 * Accepts only one cipso rule per write call.
976 * Returns number of bytes written or error code, as appropriate
978 static ssize_t smk_write_cipso(struct file *file, const char __user *buf,
979 size_t count, loff_t *ppos)
981 return smk_set_cipso(file, buf, count, ppos, SMK_FIXED24_FMT);
984 static const struct file_operations smk_cipso_ops = {
985 .open = smk_open_cipso,
988 .write = smk_write_cipso,
989 .release = seq_release,
993 * Seq_file read operations for /smack/cipso2
997 * Print cipso labels in format:
998 * label level[/cat[,cat]]
1000 static int cipso2_seq_show(struct seq_file *s, void *v)
1002 struct list_head *list = v;
1003 struct smack_known *skp =
1004 list_entry_rcu(list, struct smack_known, list);
1005 struct netlbl_lsm_catmap *cmp = skp->smk_netlabel.attr.mls.cat;
1009 seq_printf(s, "%s %3d", skp->smk_known, skp->smk_netlabel.attr.mls.lvl);
1011 for (i = netlbl_catmap_walk(cmp, 0); i >= 0;
1012 i = netlbl_catmap_walk(cmp, i + 1)) {
1013 seq_printf(s, "%c%d", sep, i);
1022 static const struct seq_operations cipso2_seq_ops = {
1023 .start = cipso_seq_start,
1024 .next = cipso_seq_next,
1025 .show = cipso2_seq_show,
1026 .stop = smk_seq_stop,
1030 * smk_open_cipso2 - open() for /smack/cipso2
1031 * @inode: inode structure representing file
1032 * @file: "cipso2" file pointer
1034 * Connect our cipso_seq_* operations with /smack/cipso2
1037 static int smk_open_cipso2(struct inode *inode, struct file *file)
1039 return seq_open(file, &cipso2_seq_ops);
1043 * smk_write_cipso2 - write() for /smack/cipso2
1044 * @file: file pointer, not actually used
1045 * @buf: where to get the data from
1046 * @count: bytes sent
1047 * @ppos: where to start
1049 * Accepts only one cipso rule per write call.
1050 * Returns number of bytes written or error code, as appropriate
1052 static ssize_t smk_write_cipso2(struct file *file, const char __user *buf,
1053 size_t count, loff_t *ppos)
1055 return smk_set_cipso(file, buf, count, ppos, SMK_LONG_FMT);
1058 static const struct file_operations smk_cipso2_ops = {
1059 .open = smk_open_cipso2,
1061 .llseek = seq_lseek,
1062 .write = smk_write_cipso2,
1063 .release = seq_release,
1067 * Seq_file read operations for /smack/netlabel
1070 static void *net4addr_seq_start(struct seq_file *s, loff_t *pos)
1072 return smk_seq_start(s, pos, &smk_net4addr_list);
1075 static void *net4addr_seq_next(struct seq_file *s, void *v, loff_t *pos)
1077 return smk_seq_next(s, v, pos, &smk_net4addr_list);
1081 * Print host/label pairs
1083 static int net4addr_seq_show(struct seq_file *s, void *v)
1085 struct list_head *list = v;
1086 struct smk_net4addr *skp =
1087 list_entry_rcu(list, struct smk_net4addr, list);
1088 char *kp = SMACK_CIPSO_OPTION;
1090 if (skp->smk_label != NULL)
1091 kp = skp->smk_label->smk_known;
1092 seq_printf(s, "%pI4/%d %s\n", &skp->smk_host.s_addr,
1093 skp->smk_masks, kp);
1098 static const struct seq_operations net4addr_seq_ops = {
1099 .start = net4addr_seq_start,
1100 .next = net4addr_seq_next,
1101 .show = net4addr_seq_show,
1102 .stop = smk_seq_stop,
1106 * smk_open_net4addr - open() for /smack/netlabel
1107 * @inode: inode structure representing file
1108 * @file: "netlabel" file pointer
1110 * Connect our net4addr_seq_* operations with /smack/netlabel
1113 static int smk_open_net4addr(struct inode *inode, struct file *file)
1115 return seq_open(file, &net4addr_seq_ops);
1119 * smk_net4addr_insert
1120 * @new : netlabel to insert
1122 * This helper insert netlabel in the smack_net4addrs list
1123 * sorted by netmask length (longest to smallest)
1124 * locked by &smk_net4addr_lock in smk_write_net4addr
1127 static void smk_net4addr_insert(struct smk_net4addr *new)
1129 struct smk_net4addr *m;
1130 struct smk_net4addr *m_next;
1132 if (list_empty(&smk_net4addr_list)) {
1133 list_add_rcu(&new->list, &smk_net4addr_list);
1137 m = list_entry_rcu(smk_net4addr_list.next,
1138 struct smk_net4addr, list);
1140 /* the comparison '>' is a bit hacky, but works */
1141 if (new->smk_masks > m->smk_masks) {
1142 list_add_rcu(&new->list, &smk_net4addr_list);
1146 list_for_each_entry_rcu(m, &smk_net4addr_list, list) {
1147 if (list_is_last(&m->list, &smk_net4addr_list)) {
1148 list_add_rcu(&new->list, &m->list);
1151 m_next = list_entry_rcu(m->list.next,
1152 struct smk_net4addr, list);
1153 if (new->smk_masks > m_next->smk_masks) {
1154 list_add_rcu(&new->list, &m->list);
1162 * smk_write_net4addr - write() for /smack/netlabel
1163 * @file: file pointer, not actually used
1164 * @buf: where to get the data from
1165 * @count: bytes sent
1166 * @ppos: where to start
1168 * Accepts only one net4addr per write call.
1169 * Returns number of bytes written or error code, as appropriate
1171 static ssize_t smk_write_net4addr(struct file *file, const char __user *buf,
1172 size_t count, loff_t *ppos)
1174 struct smk_net4addr *snp;
1175 struct sockaddr_in newname;
1177 struct smack_known *skp = NULL;
1179 char *host = (char *)&newname.sin_addr.s_addr;
1181 struct netlbl_audit audit_info;
1182 struct in_addr mask;
1186 u32 mask_bits = (1<<31);
1191 * Must have privilege.
1192 * No partial writes.
1193 * Enough data must be present.
1194 * "<addr/mask, as a.b.c.d/e><space><label>"
1195 * "<addr, as a.b.c.d><space><label>"
1197 if (!smack_privileged(CAP_MAC_ADMIN))
1201 if (count < SMK_NETLBLADDRMIN)
1204 data = kzalloc(count + 1, GFP_KERNEL);
1208 if (copy_from_user(data, buf, count) != 0) {
1213 smack = kzalloc(count + 1, GFP_KERNEL);
1214 if (smack == NULL) {
1221 rc = sscanf(data, "%hhd.%hhd.%hhd.%hhd/%u %s",
1222 &host[0], &host[1], &host[2], &host[3], &masks, smack);
1224 rc = sscanf(data, "%hhd.%hhd.%hhd.%hhd %s",
1225 &host[0], &host[1], &host[2], &host[3], smack);
1233 if (masks > BEBITS) {
1239 * If smack begins with '-', it is an option, don't import it
1241 if (smack[0] != '-') {
1242 skp = smk_import_entry(smack, 0);
1249 * Only the -CIPSO option is supported for IPv4
1251 if (strcmp(smack, SMACK_CIPSO_OPTION) != 0) {
1257 for (m = masks, temp_mask = 0; m > 0; m--) {
1258 temp_mask |= mask_bits;
1261 mask.s_addr = cpu_to_be32(temp_mask);
1263 newname.sin_addr.s_addr &= mask.s_addr;
1265 * Only allow one writer at a time. Writes should be
1266 * quite rare and small in any case.
1268 mutex_lock(&smk_net4addr_lock);
1270 nsa = newname.sin_addr.s_addr;
1271 /* try to find if the prefix is already in the list */
1273 list_for_each_entry_rcu(snp, &smk_net4addr_list, list) {
1274 if (snp->smk_host.s_addr == nsa && snp->smk_masks == masks) {
1279 smk_netlabel_audit_set(&audit_info);
1282 snp = kzalloc(sizeof(*snp), GFP_KERNEL);
1287 snp->smk_host.s_addr = newname.sin_addr.s_addr;
1288 snp->smk_mask.s_addr = mask.s_addr;
1289 snp->smk_label = skp;
1290 snp->smk_masks = masks;
1291 smk_net4addr_insert(snp);
1295 * Delete the unlabeled entry, only if the previous label
1296 * wasn't the special CIPSO option
1298 if (snp->smk_label != NULL)
1299 rc = netlbl_cfg_unlbl_static_del(&init_net, NULL,
1300 &snp->smk_host, &snp->smk_mask,
1301 PF_INET, &audit_info);
1304 snp->smk_label = skp;
1308 * Now tell netlabel about the single label nature of
1309 * this host so that incoming packets get labeled.
1310 * but only if we didn't get the special CIPSO option
1312 if (rc == 0 && skp != NULL)
1313 rc = netlbl_cfg_unlbl_static_add(&init_net, NULL,
1314 &snp->smk_host, &snp->smk_mask, PF_INET,
1315 snp->smk_label->smk_secid, &audit_info);
1320 mutex_unlock(&smk_net4addr_lock);
1330 static const struct file_operations smk_net4addr_ops = {
1331 .open = smk_open_net4addr,
1333 .llseek = seq_lseek,
1334 .write = smk_write_net4addr,
1335 .release = seq_release,
1338 #if IS_ENABLED(CONFIG_IPV6)
1340 * Seq_file read operations for /smack/netlabel6
1343 static void *net6addr_seq_start(struct seq_file *s, loff_t *pos)
1345 return smk_seq_start(s, pos, &smk_net6addr_list);
1348 static void *net6addr_seq_next(struct seq_file *s, void *v, loff_t *pos)
1350 return smk_seq_next(s, v, pos, &smk_net6addr_list);
1354 * Print host/label pairs
1356 static int net6addr_seq_show(struct seq_file *s, void *v)
1358 struct list_head *list = v;
1359 struct smk_net6addr *skp =
1360 list_entry(list, struct smk_net6addr, list);
1362 if (skp->smk_label != NULL)
1363 seq_printf(s, "%pI6/%d %s\n", &skp->smk_host, skp->smk_masks,
1364 skp->smk_label->smk_known);
1369 static const struct seq_operations net6addr_seq_ops = {
1370 .start = net6addr_seq_start,
1371 .next = net6addr_seq_next,
1372 .show = net6addr_seq_show,
1373 .stop = smk_seq_stop,
1377 * smk_open_net6addr - open() for /smack/netlabel
1378 * @inode: inode structure representing file
1379 * @file: "netlabel" file pointer
1381 * Connect our net6addr_seq_* operations with /smack/netlabel
1384 static int smk_open_net6addr(struct inode *inode, struct file *file)
1386 return seq_open(file, &net6addr_seq_ops);
1390 * smk_net6addr_insert
1391 * @new : entry to insert
1393 * This inserts an entry in the smack_net6addrs list
1394 * sorted by netmask length (longest to smallest)
1395 * locked by &smk_net6addr_lock in smk_write_net6addr
1398 static void smk_net6addr_insert(struct smk_net6addr *new)
1400 struct smk_net6addr *m_next;
1401 struct smk_net6addr *m;
1403 if (list_empty(&smk_net6addr_list)) {
1404 list_add_rcu(&new->list, &smk_net6addr_list);
1408 m = list_entry_rcu(smk_net6addr_list.next,
1409 struct smk_net6addr, list);
1411 if (new->smk_masks > m->smk_masks) {
1412 list_add_rcu(&new->list, &smk_net6addr_list);
1416 list_for_each_entry_rcu(m, &smk_net6addr_list, list) {
1417 if (list_is_last(&m->list, &smk_net6addr_list)) {
1418 list_add_rcu(&new->list, &m->list);
1421 m_next = list_entry_rcu(m->list.next,
1422 struct smk_net6addr, list);
1423 if (new->smk_masks > m_next->smk_masks) {
1424 list_add_rcu(&new->list, &m->list);
1432 * smk_write_net6addr - write() for /smack/netlabel
1433 * @file: file pointer, not actually used
1434 * @buf: where to get the data from
1435 * @count: bytes sent
1436 * @ppos: where to start
1438 * Accepts only one net6addr per write call.
1439 * Returns number of bytes written or error code, as appropriate
1441 static ssize_t smk_write_net6addr(struct file *file, const char __user *buf,
1442 size_t count, loff_t *ppos)
1444 struct smk_net6addr *snp;
1445 struct in6_addr newname;
1446 struct in6_addr fullmask;
1447 struct smack_known *skp = NULL;
1453 unsigned int scanned[8];
1455 unsigned int mask = 128;
1458 * Must have privilege.
1459 * No partial writes.
1460 * Enough data must be present.
1461 * "<addr/mask, as a:b:c:d:e:f:g:h/e><space><label>"
1462 * "<addr, as a:b:c:d:e:f:g:h><space><label>"
1464 if (!smack_privileged(CAP_MAC_ADMIN))
1468 if (count < SMK_NETLBLADDRMIN)
1471 data = kzalloc(count + 1, GFP_KERNEL);
1475 if (copy_from_user(data, buf, count) != 0) {
1480 smack = kzalloc(count + 1, GFP_KERNEL);
1481 if (smack == NULL) {
1488 i = sscanf(data, "%x:%x:%x:%x:%x:%x:%x:%x/%u %s",
1489 &scanned[0], &scanned[1], &scanned[2], &scanned[3],
1490 &scanned[4], &scanned[5], &scanned[6], &scanned[7],
1493 i = sscanf(data, "%x:%x:%x:%x:%x:%x:%x:%x %s",
1494 &scanned[0], &scanned[1], &scanned[2],
1495 &scanned[3], &scanned[4], &scanned[5],
1496 &scanned[6], &scanned[7], smack);
1506 for (i = 0; i < 8; i++) {
1507 if (scanned[i] > 0xffff) {
1511 newname.s6_addr16[i] = htons(scanned[i]);
1515 * If smack begins with '-', it is an option, don't import it
1517 if (smack[0] != '-') {
1518 skp = smk_import_entry(smack, 0);
1525 * Only -DELETE is supported for IPv6
1527 if (strcmp(smack, SMACK_DELETE_OPTION) != 0) {
1533 for (i = 0, m = mask; i < 8; i++) {
1535 fullmask.s6_addr16[i] = 0xffff;
1538 fullmask.s6_addr16[i] = (1 << m) - 1;
1541 fullmask.s6_addr16[i] = 0;
1542 newname.s6_addr16[i] &= fullmask.s6_addr16[i];
1546 * Only allow one writer at a time. Writes should be
1547 * quite rare and small in any case.
1549 mutex_lock(&smk_net6addr_lock);
1551 * Try to find the prefix in the list
1553 list_for_each_entry_rcu(snp, &smk_net6addr_list, list) {
1554 if (mask != snp->smk_masks)
1556 for (found = 1, i = 0; i < 8; i++) {
1557 if (newname.s6_addr16[i] !=
1558 snp->smk_host.s6_addr16[i]) {
1567 snp = kzalloc(sizeof(*snp), GFP_KERNEL);
1571 snp->smk_host = newname;
1572 snp->smk_mask = fullmask;
1573 snp->smk_masks = mask;
1574 snp->smk_label = skp;
1575 smk_net6addr_insert(snp);
1578 snp->smk_label = skp;
1584 mutex_unlock(&smk_net6addr_lock);
1594 static const struct file_operations smk_net6addr_ops = {
1595 .open = smk_open_net6addr,
1597 .llseek = seq_lseek,
1598 .write = smk_write_net6addr,
1599 .release = seq_release,
1601 #endif /* CONFIG_IPV6 */
1604 * smk_read_doi - read() for /smack/doi
1605 * @filp: file pointer, not actually used
1606 * @buf: where to put the result
1607 * @count: maximum to send along
1608 * @ppos: where to start
1610 * Returns number of bytes read or error code, as appropriate
1612 static ssize_t smk_read_doi(struct file *filp, char __user *buf,
1613 size_t count, loff_t *ppos)
1621 sprintf(temp, "%d", smk_cipso_doi_value);
1622 rc = simple_read_from_buffer(buf, count, ppos, temp, strlen(temp));
1628 * smk_write_doi - write() for /smack/doi
1629 * @file: file pointer, not actually used
1630 * @buf: where to get the data from
1631 * @count: bytes sent
1632 * @ppos: where to start
1634 * Returns number of bytes written or error code, as appropriate
1636 static ssize_t smk_write_doi(struct file *file, const char __user *buf,
1637 size_t count, loff_t *ppos)
1642 if (!smack_privileged(CAP_MAC_ADMIN))
1645 if (count >= sizeof(temp) || count == 0)
1648 if (copy_from_user(temp, buf, count) != 0)
1653 if (sscanf(temp, "%d", &i) != 1)
1656 smk_cipso_doi_value = i;
1663 static const struct file_operations smk_doi_ops = {
1664 .read = smk_read_doi,
1665 .write = smk_write_doi,
1666 .llseek = default_llseek,
1670 * smk_read_direct - read() for /smack/direct
1671 * @filp: file pointer, not actually used
1672 * @buf: where to put the result
1673 * @count: maximum to send along
1674 * @ppos: where to start
1676 * Returns number of bytes read or error code, as appropriate
1678 static ssize_t smk_read_direct(struct file *filp, char __user *buf,
1679 size_t count, loff_t *ppos)
1687 sprintf(temp, "%d", smack_cipso_direct);
1688 rc = simple_read_from_buffer(buf, count, ppos, temp, strlen(temp));
1694 * smk_write_direct - write() for /smack/direct
1695 * @file: file pointer, not actually used
1696 * @buf: where to get the data from
1697 * @count: bytes sent
1698 * @ppos: where to start
1700 * Returns number of bytes written or error code, as appropriate
1702 static ssize_t smk_write_direct(struct file *file, const char __user *buf,
1703 size_t count, loff_t *ppos)
1705 struct smack_known *skp;
1709 if (!smack_privileged(CAP_MAC_ADMIN))
1712 if (count >= sizeof(temp) || count == 0)
1715 if (copy_from_user(temp, buf, count) != 0)
1720 if (sscanf(temp, "%d", &i) != 1)
1724 * Don't do anything if the value hasn't actually changed.
1725 * If it is changing reset the level on entries that were
1726 * set up to be direct when they were created.
1728 if (smack_cipso_direct != i) {
1729 mutex_lock(&smack_known_lock);
1730 list_for_each_entry_rcu(skp, &smack_known_list, list)
1731 if (skp->smk_netlabel.attr.mls.lvl ==
1733 skp->smk_netlabel.attr.mls.lvl = i;
1734 smack_cipso_direct = i;
1735 mutex_unlock(&smack_known_lock);
1741 static const struct file_operations smk_direct_ops = {
1742 .read = smk_read_direct,
1743 .write = smk_write_direct,
1744 .llseek = default_llseek,
1748 * smk_read_mapped - read() for /smack/mapped
1749 * @filp: file pointer, not actually used
1750 * @buf: where to put the result
1751 * @count: maximum to send along
1752 * @ppos: where to start
1754 * Returns number of bytes read or error code, as appropriate
1756 static ssize_t smk_read_mapped(struct file *filp, char __user *buf,
1757 size_t count, loff_t *ppos)
1765 sprintf(temp, "%d", smack_cipso_mapped);
1766 rc = simple_read_from_buffer(buf, count, ppos, temp, strlen(temp));
1772 * smk_write_mapped - write() for /smack/mapped
1773 * @file: file pointer, not actually used
1774 * @buf: where to get the data from
1775 * @count: bytes sent
1776 * @ppos: where to start
1778 * Returns number of bytes written or error code, as appropriate
1780 static ssize_t smk_write_mapped(struct file *file, const char __user *buf,
1781 size_t count, loff_t *ppos)
1783 struct smack_known *skp;
1787 if (!smack_privileged(CAP_MAC_ADMIN))
1790 if (count >= sizeof(temp) || count == 0)
1793 if (copy_from_user(temp, buf, count) != 0)
1798 if (sscanf(temp, "%d", &i) != 1)
1802 * Don't do anything if the value hasn't actually changed.
1803 * If it is changing reset the level on entries that were
1804 * set up to be mapped when they were created.
1806 if (smack_cipso_mapped != i) {
1807 mutex_lock(&smack_known_lock);
1808 list_for_each_entry_rcu(skp, &smack_known_list, list)
1809 if (skp->smk_netlabel.attr.mls.lvl ==
1811 skp->smk_netlabel.attr.mls.lvl = i;
1812 smack_cipso_mapped = i;
1813 mutex_unlock(&smack_known_lock);
1819 static const struct file_operations smk_mapped_ops = {
1820 .read = smk_read_mapped,
1821 .write = smk_write_mapped,
1822 .llseek = default_llseek,
1826 * smk_read_ambient - read() for /smack/ambient
1827 * @filp: file pointer, not actually used
1828 * @buf: where to put the result
1829 * @cn: maximum to send along
1830 * @ppos: where to start
1832 * Returns number of bytes read or error code, as appropriate
1834 static ssize_t smk_read_ambient(struct file *filp, char __user *buf,
1835 size_t cn, loff_t *ppos)
1843 * Being careful to avoid a problem in the case where
1844 * smack_net_ambient gets changed in midstream.
1846 mutex_lock(&smack_ambient_lock);
1848 asize = strlen(smack_net_ambient->smk_known) + 1;
1851 rc = simple_read_from_buffer(buf, cn, ppos,
1852 smack_net_ambient->smk_known,
1857 mutex_unlock(&smack_ambient_lock);
1863 * smk_write_ambient - write() for /smack/ambient
1864 * @file: file pointer, not actually used
1865 * @buf: where to get the data from
1866 * @count: bytes sent
1867 * @ppos: where to start
1869 * Returns number of bytes written or error code, as appropriate
1871 static ssize_t smk_write_ambient(struct file *file, const char __user *buf,
1872 size_t count, loff_t *ppos)
1874 struct smack_known *skp;
1879 if (!smack_privileged(CAP_MAC_ADMIN))
1882 data = kzalloc(count + 1, GFP_KERNEL);
1886 if (copy_from_user(data, buf, count) != 0) {
1891 skp = smk_import_entry(data, count);
1897 mutex_lock(&smack_ambient_lock);
1899 oldambient = smack_net_ambient->smk_known;
1900 smack_net_ambient = skp;
1901 smk_unlbl_ambient(oldambient);
1903 mutex_unlock(&smack_ambient_lock);
1910 static const struct file_operations smk_ambient_ops = {
1911 .read = smk_read_ambient,
1912 .write = smk_write_ambient,
1913 .llseek = default_llseek,
1917 * Seq_file operations for /smack/onlycap
1919 static void *onlycap_seq_start(struct seq_file *s, loff_t *pos)
1921 return smk_seq_start(s, pos, &smack_onlycap_list);
1924 static void *onlycap_seq_next(struct seq_file *s, void *v, loff_t *pos)
1926 return smk_seq_next(s, v, pos, &smack_onlycap_list);
1929 static int onlycap_seq_show(struct seq_file *s, void *v)
1931 struct list_head *list = v;
1932 struct smack_known_list_elem *sklep =
1933 list_entry_rcu(list, struct smack_known_list_elem, list);
1935 seq_puts(s, sklep->smk_label->smk_known);
1941 static const struct seq_operations onlycap_seq_ops = {
1942 .start = onlycap_seq_start,
1943 .next = onlycap_seq_next,
1944 .show = onlycap_seq_show,
1945 .stop = smk_seq_stop,
1948 static int smk_open_onlycap(struct inode *inode, struct file *file)
1950 return seq_open(file, &onlycap_seq_ops);
1954 * smk_list_swap_rcu - swap public list with a private one in RCU-safe way
1955 * The caller must hold appropriate mutex to prevent concurrent modifications
1956 * to the public list.
1957 * Private list is assumed to be not accessible to other threads yet.
1959 * @public: public list
1960 * @private: private list
1962 static void smk_list_swap_rcu(struct list_head *public,
1963 struct list_head *private)
1965 struct list_head *first, *last;
1967 if (list_empty(public)) {
1968 list_splice_init_rcu(private, public, synchronize_rcu);
1970 /* Remember public list before replacing it */
1971 first = public->next;
1972 last = public->prev;
1974 /* Publish private list in place of public in RCU-safe way */
1975 private->prev->next = public;
1976 private->next->prev = public;
1977 rcu_assign_pointer(public->next, private->next);
1978 public->prev = private->prev;
1982 /* When all readers are done with the old public list,
1983 * attach it in place of private */
1984 private->next = first;
1985 private->prev = last;
1986 first->prev = private;
1987 last->next = private;
1992 * smk_parse_label_list - parse list of Smack labels, separated by spaces
1994 * @data: the string to parse
1995 * @private: destination list
1997 * Returns zero on success or error code, as appropriate
1999 static int smk_parse_label_list(char *data, struct list_head *list)
2002 struct smack_known *skp;
2003 struct smack_known_list_elem *sklep;
2005 while ((tok = strsep(&data, " ")) != NULL) {
2009 skp = smk_import_entry(tok, 0);
2011 return PTR_ERR(skp);
2013 sklep = kzalloc(sizeof(*sklep), GFP_KERNEL);
2017 sklep->smk_label = skp;
2018 list_add(&sklep->list, list);
2025 * smk_destroy_label_list - destroy a list of smack_known_list_elem
2026 * @head: header pointer of the list to destroy
2028 void smk_destroy_label_list(struct list_head *list)
2030 struct smack_known_list_elem *sklep;
2031 struct smack_known_list_elem *sklep2;
2033 list_for_each_entry_safe(sklep, sklep2, list, list)
2036 INIT_LIST_HEAD(list);
2040 * smk_write_onlycap - write() for smackfs/onlycap
2041 * @file: file pointer, not actually used
2042 * @buf: where to get the data from
2043 * @count: bytes sent
2044 * @ppos: where to start
2046 * Returns number of bytes written or error code, as appropriate
2048 static ssize_t smk_write_onlycap(struct file *file, const char __user *buf,
2049 size_t count, loff_t *ppos)
2052 LIST_HEAD(list_tmp);
2055 if (!smack_privileged(CAP_MAC_ADMIN))
2058 data = kzalloc(count + 1, GFP_KERNEL);
2062 if (copy_from_user(data, buf, count) != 0) {
2067 rc = smk_parse_label_list(data, &list_tmp);
2071 * Clear the smack_onlycap on invalid label errors. This means
2072 * that we can pass a null string to unset the onlycap value.
2074 * Importing will also reject a label beginning with '-',
2075 * so "-usecapabilities" will also work.
2077 * But do so only on invalid label, not on system errors.
2078 * The invalid label must be first to count as clearing attempt.
2080 if (!rc || (rc == -EINVAL && list_empty(&list_tmp))) {
2081 mutex_lock(&smack_onlycap_lock);
2082 smk_list_swap_rcu(&smack_onlycap_list, &list_tmp);
2083 mutex_unlock(&smack_onlycap_lock);
2087 smk_destroy_label_list(&list_tmp);
2092 static const struct file_operations smk_onlycap_ops = {
2093 .open = smk_open_onlycap,
2095 .write = smk_write_onlycap,
2096 .llseek = seq_lseek,
2097 .release = seq_release,
2100 #ifdef CONFIG_SECURITY_SMACK_BRINGUP
2102 * smk_read_unconfined - read() for smackfs/unconfined
2103 * @filp: file pointer, not actually used
2104 * @buf: where to put the result
2105 * @cn: maximum to send along
2106 * @ppos: where to start
2108 * Returns number of bytes read or error code, as appropriate
2110 static ssize_t smk_read_unconfined(struct file *filp, char __user *buf,
2111 size_t cn, loff_t *ppos)
2114 ssize_t rc = -EINVAL;
2120 if (smack_unconfined != NULL)
2121 smack = smack_unconfined->smk_known;
2123 asize = strlen(smack) + 1;
2126 rc = simple_read_from_buffer(buf, cn, ppos, smack, asize);
2132 * smk_write_unconfined - write() for smackfs/unconfined
2133 * @file: file pointer, not actually used
2134 * @buf: where to get the data from
2135 * @count: bytes sent
2136 * @ppos: where to start
2138 * Returns number of bytes written or error code, as appropriate
2140 static ssize_t smk_write_unconfined(struct file *file, const char __user *buf,
2141 size_t count, loff_t *ppos)
2144 struct smack_known *skp;
2147 if (!smack_privileged(CAP_MAC_ADMIN))
2150 data = kzalloc(count + 1, GFP_KERNEL);
2154 if (copy_from_user(data, buf, count) != 0) {
2160 * Clear the smack_unconfined on invalid label errors. This means
2161 * that we can pass a null string to unset the unconfined value.
2163 * Importing will also reject a label beginning with '-',
2164 * so "-confine" will also work.
2166 * But do so only on invalid label, not on system errors.
2168 skp = smk_import_entry(data, count);
2169 if (PTR_ERR(skp) == -EINVAL)
2171 else if (IS_ERR(skp)) {
2176 smack_unconfined = skp;
2183 static const struct file_operations smk_unconfined_ops = {
2184 .read = smk_read_unconfined,
2185 .write = smk_write_unconfined,
2186 .llseek = default_llseek,
2188 #endif /* CONFIG_SECURITY_SMACK_BRINGUP */
2191 * smk_read_logging - read() for /smack/logging
2192 * @filp: file pointer, not actually used
2193 * @buf: where to put the result
2194 * @cn: maximum to send along
2195 * @ppos: where to start
2197 * Returns number of bytes read or error code, as appropriate
2199 static ssize_t smk_read_logging(struct file *filp, char __user *buf,
2200 size_t count, loff_t *ppos)
2208 sprintf(temp, "%d\n", log_policy);
2209 rc = simple_read_from_buffer(buf, count, ppos, temp, strlen(temp));
2214 * smk_write_logging - write() for /smack/logging
2215 * @file: file pointer, not actually used
2216 * @buf: where to get the data from
2217 * @count: bytes sent
2218 * @ppos: where to start
2220 * Returns number of bytes written or error code, as appropriate
2222 static ssize_t smk_write_logging(struct file *file, const char __user *buf,
2223 size_t count, loff_t *ppos)
2228 if (!smack_privileged(CAP_MAC_ADMIN))
2231 if (count >= sizeof(temp) || count == 0)
2234 if (copy_from_user(temp, buf, count) != 0)
2239 if (sscanf(temp, "%d", &i) != 1)
2249 static const struct file_operations smk_logging_ops = {
2250 .read = smk_read_logging,
2251 .write = smk_write_logging,
2252 .llseek = default_llseek,
2256 * Seq_file read operations for /smack/load-self
2259 static void *load_self_seq_start(struct seq_file *s, loff_t *pos)
2261 struct task_smack *tsp = current_security();
2263 return smk_seq_start(s, pos, &tsp->smk_rules);
2266 static void *load_self_seq_next(struct seq_file *s, void *v, loff_t *pos)
2268 struct task_smack *tsp = current_security();
2270 return smk_seq_next(s, v, pos, &tsp->smk_rules);
2273 static int load_self_seq_show(struct seq_file *s, void *v)
2275 struct list_head *list = v;
2276 struct smack_rule *srp =
2277 list_entry_rcu(list, struct smack_rule, list);
2279 smk_rule_show(s, srp, SMK_LABELLEN);
2284 static const struct seq_operations load_self_seq_ops = {
2285 .start = load_self_seq_start,
2286 .next = load_self_seq_next,
2287 .show = load_self_seq_show,
2288 .stop = smk_seq_stop,
2293 * smk_open_load_self - open() for /smack/load-self2
2294 * @inode: inode structure representing file
2295 * @file: "load" file pointer
2297 * For reading, use load_seq_* seq_file reading operations.
2299 static int smk_open_load_self(struct inode *inode, struct file *file)
2301 return seq_open(file, &load_self_seq_ops);
2305 * smk_write_load_self - write() for /smack/load-self
2306 * @file: file pointer, not actually used
2307 * @buf: where to get the data from
2308 * @count: bytes sent
2309 * @ppos: where to start - must be 0
2312 static ssize_t smk_write_load_self(struct file *file, const char __user *buf,
2313 size_t count, loff_t *ppos)
2315 struct task_smack *tsp = current_security();
2317 return smk_write_rules_list(file, buf, count, ppos, &tsp->smk_rules,
2318 &tsp->smk_rules_lock, SMK_FIXED24_FMT);
2321 static const struct file_operations smk_load_self_ops = {
2322 .open = smk_open_load_self,
2324 .llseek = seq_lseek,
2325 .write = smk_write_load_self,
2326 .release = seq_release,
2330 * smk_user_access - handle access check transaction
2331 * @file: file pointer
2332 * @buf: data from user space
2333 * @count: bytes sent
2334 * @ppos: where to start - must be 0
2336 static ssize_t smk_user_access(struct file *file, const char __user *buf,
2337 size_t count, loff_t *ppos, int format)
2339 struct smack_parsed_rule rule;
2343 data = simple_transaction_get(file, buf, count);
2345 return PTR_ERR(data);
2347 if (format == SMK_FIXED24_FMT) {
2348 if (count < SMK_LOADLEN)
2350 res = smk_parse_rule(data, &rule, 0);
2353 * simple_transaction_get() returns null-terminated data
2355 res = smk_parse_long_rule(data, &rule, 0, 3);
2359 res = smk_access(rule.smk_subject, rule.smk_object,
2360 rule.smk_access1, NULL);
2361 else if (res != -ENOENT)
2365 * smk_access() can return a value > 0 in the "bringup" case.
2367 data[0] = res >= 0 ? '1' : '0';
2370 simple_transaction_set(file, 2);
2372 if (format == SMK_FIXED24_FMT)
2378 * smk_write_access - handle access check transaction
2379 * @file: file pointer
2380 * @buf: data from user space
2381 * @count: bytes sent
2382 * @ppos: where to start - must be 0
2384 static ssize_t smk_write_access(struct file *file, const char __user *buf,
2385 size_t count, loff_t *ppos)
2387 return smk_user_access(file, buf, count, ppos, SMK_FIXED24_FMT);
2390 static const struct file_operations smk_access_ops = {
2391 .write = smk_write_access,
2392 .read = simple_transaction_read,
2393 .release = simple_transaction_release,
2394 .llseek = generic_file_llseek,
2399 * Seq_file read operations for /smack/load2
2402 static int load2_seq_show(struct seq_file *s, void *v)
2404 struct list_head *list = v;
2405 struct smack_master_list *smlp =
2406 list_entry_rcu(list, struct smack_master_list, list);
2408 smk_rule_show(s, smlp->smk_rule, SMK_LONGLABEL);
2413 static const struct seq_operations load2_seq_ops = {
2414 .start = load2_seq_start,
2415 .next = load2_seq_next,
2416 .show = load2_seq_show,
2417 .stop = smk_seq_stop,
2421 * smk_open_load2 - open() for /smack/load2
2422 * @inode: inode structure representing file
2423 * @file: "load2" file pointer
2425 * For reading, use load2_seq_* seq_file reading operations.
2427 static int smk_open_load2(struct inode *inode, struct file *file)
2429 return seq_open(file, &load2_seq_ops);
2433 * smk_write_load2 - write() for /smack/load2
2434 * @file: file pointer, not actually used
2435 * @buf: where to get the data from
2436 * @count: bytes sent
2437 * @ppos: where to start - must be 0
2440 static ssize_t smk_write_load2(struct file *file, const char __user *buf,
2441 size_t count, loff_t *ppos)
2444 * Must have privilege.
2446 if (!smack_privileged(CAP_MAC_ADMIN))
2449 return smk_write_rules_list(file, buf, count, ppos, NULL, NULL,
2453 static const struct file_operations smk_load2_ops = {
2454 .open = smk_open_load2,
2456 .llseek = seq_lseek,
2457 .write = smk_write_load2,
2458 .release = seq_release,
2462 * Seq_file read operations for /smack/load-self2
2465 static void *load_self2_seq_start(struct seq_file *s, loff_t *pos)
2467 struct task_smack *tsp = current_security();
2469 return smk_seq_start(s, pos, &tsp->smk_rules);
2472 static void *load_self2_seq_next(struct seq_file *s, void *v, loff_t *pos)
2474 struct task_smack *tsp = current_security();
2476 return smk_seq_next(s, v, pos, &tsp->smk_rules);
2479 static int load_self2_seq_show(struct seq_file *s, void *v)
2481 struct list_head *list = v;
2482 struct smack_rule *srp =
2483 list_entry_rcu(list, struct smack_rule, list);
2485 smk_rule_show(s, srp, SMK_LONGLABEL);
2490 static const struct seq_operations load_self2_seq_ops = {
2491 .start = load_self2_seq_start,
2492 .next = load_self2_seq_next,
2493 .show = load_self2_seq_show,
2494 .stop = smk_seq_stop,
2498 * smk_open_load_self2 - open() for /smack/load-self2
2499 * @inode: inode structure representing file
2500 * @file: "load" file pointer
2502 * For reading, use load_seq_* seq_file reading operations.
2504 static int smk_open_load_self2(struct inode *inode, struct file *file)
2506 return seq_open(file, &load_self2_seq_ops);
2510 * smk_write_load_self2 - write() for /smack/load-self2
2511 * @file: file pointer, not actually used
2512 * @buf: where to get the data from
2513 * @count: bytes sent
2514 * @ppos: where to start - must be 0
2517 static ssize_t smk_write_load_self2(struct file *file, const char __user *buf,
2518 size_t count, loff_t *ppos)
2520 struct task_smack *tsp = current_security();
2522 return smk_write_rules_list(file, buf, count, ppos, &tsp->smk_rules,
2523 &tsp->smk_rules_lock, SMK_LONG_FMT);
2526 static const struct file_operations smk_load_self2_ops = {
2527 .open = smk_open_load_self2,
2529 .llseek = seq_lseek,
2530 .write = smk_write_load_self2,
2531 .release = seq_release,
2535 * smk_write_access2 - handle access check transaction
2536 * @file: file pointer
2537 * @buf: data from user space
2538 * @count: bytes sent
2539 * @ppos: where to start - must be 0
2541 static ssize_t smk_write_access2(struct file *file, const char __user *buf,
2542 size_t count, loff_t *ppos)
2544 return smk_user_access(file, buf, count, ppos, SMK_LONG_FMT);
2547 static const struct file_operations smk_access2_ops = {
2548 .write = smk_write_access2,
2549 .read = simple_transaction_read,
2550 .release = simple_transaction_release,
2551 .llseek = generic_file_llseek,
2555 * smk_write_revoke_subj - write() for /smack/revoke-subject
2556 * @file: file pointer
2557 * @buf: data from user space
2558 * @count: bytes sent
2559 * @ppos: where to start - must be 0
2561 static ssize_t smk_write_revoke_subj(struct file *file, const char __user *buf,
2562 size_t count, loff_t *ppos)
2566 struct smack_known *skp;
2567 struct smack_rule *sp;
2568 struct list_head *rule_list;
2569 struct mutex *rule_lock;
2575 if (!smack_privileged(CAP_MAC_ADMIN))
2578 if (count == 0 || count > SMK_LONGLABEL)
2581 data = kzalloc(count, GFP_KERNEL);
2585 if (copy_from_user(data, buf, count) != 0) {
2590 cp = smk_parse_smack(data, count);
2596 skp = smk_find_entry(cp);
2600 rule_list = &skp->smk_rules;
2601 rule_lock = &skp->smk_rules_lock;
2603 mutex_lock(rule_lock);
2605 list_for_each_entry_rcu(sp, rule_list, list)
2608 mutex_unlock(rule_lock);
2618 static const struct file_operations smk_revoke_subj_ops = {
2619 .write = smk_write_revoke_subj,
2620 .read = simple_transaction_read,
2621 .release = simple_transaction_release,
2622 .llseek = generic_file_llseek,
2626 * smk_init_sysfs - initialize /sys/fs/smackfs
2629 static int smk_init_sysfs(void)
2631 return sysfs_create_mount_point(fs_kobj, "smackfs");
2635 * smk_write_change_rule - write() for /smack/change-rule
2636 * @file: file pointer
2637 * @buf: data from user space
2638 * @count: bytes sent
2639 * @ppos: where to start - must be 0
2641 static ssize_t smk_write_change_rule(struct file *file, const char __user *buf,
2642 size_t count, loff_t *ppos)
2645 * Must have privilege.
2647 if (!smack_privileged(CAP_MAC_ADMIN))
2650 return smk_write_rules_list(file, buf, count, ppos, NULL, NULL,
2654 static const struct file_operations smk_change_rule_ops = {
2655 .write = smk_write_change_rule,
2656 .read = simple_transaction_read,
2657 .release = simple_transaction_release,
2658 .llseek = generic_file_llseek,
2662 * smk_read_syslog - read() for smackfs/syslog
2663 * @filp: file pointer, not actually used
2664 * @buf: where to put the result
2665 * @cn: maximum to send along
2666 * @ppos: where to start
2668 * Returns number of bytes read or error code, as appropriate
2670 static ssize_t smk_read_syslog(struct file *filp, char __user *buf,
2671 size_t cn, loff_t *ppos)
2673 struct smack_known *skp;
2674 ssize_t rc = -EINVAL;
2680 if (smack_syslog_label == NULL)
2681 skp = &smack_known_star;
2683 skp = smack_syslog_label;
2685 asize = strlen(skp->smk_known) + 1;
2688 rc = simple_read_from_buffer(buf, cn, ppos, skp->smk_known,
2695 * smk_write_syslog - write() for smackfs/syslog
2696 * @file: file pointer, not actually used
2697 * @buf: where to get the data from
2698 * @count: bytes sent
2699 * @ppos: where to start
2701 * Returns number of bytes written or error code, as appropriate
2703 static ssize_t smk_write_syslog(struct file *file, const char __user *buf,
2704 size_t count, loff_t *ppos)
2707 struct smack_known *skp;
2710 if (!smack_privileged(CAP_MAC_ADMIN))
2713 data = kzalloc(count + 1, GFP_KERNEL);
2717 if (copy_from_user(data, buf, count) != 0)
2720 skp = smk_import_entry(data, count);
2724 smack_syslog_label = skp;
2731 static const struct file_operations smk_syslog_ops = {
2732 .read = smk_read_syslog,
2733 .write = smk_write_syslog,
2734 .llseek = default_llseek,
2738 * Seq_file read operations for /smack/relabel-self
2741 static void *relabel_self_seq_start(struct seq_file *s, loff_t *pos)
2743 struct task_smack *tsp = current_security();
2745 return smk_seq_start(s, pos, &tsp->smk_relabel);
2748 static void *relabel_self_seq_next(struct seq_file *s, void *v, loff_t *pos)
2750 struct task_smack *tsp = current_security();
2752 return smk_seq_next(s, v, pos, &tsp->smk_relabel);
2755 static int relabel_self_seq_show(struct seq_file *s, void *v)
2757 struct list_head *list = v;
2758 struct smack_known_list_elem *sklep =
2759 list_entry(list, struct smack_known_list_elem, list);
2761 seq_puts(s, sklep->smk_label->smk_known);
2767 static const struct seq_operations relabel_self_seq_ops = {
2768 .start = relabel_self_seq_start,
2769 .next = relabel_self_seq_next,
2770 .show = relabel_self_seq_show,
2771 .stop = smk_seq_stop,
2775 * smk_open_relabel_self - open() for /smack/relabel-self
2776 * @inode: inode structure representing file
2777 * @file: "relabel-self" file pointer
2779 * Connect our relabel_self_seq_* operations with /smack/relabel-self
2782 static int smk_open_relabel_self(struct inode *inode, struct file *file)
2784 return seq_open(file, &relabel_self_seq_ops);
2788 * smk_write_relabel_self - write() for /smack/relabel-self
2789 * @file: file pointer, not actually used
2790 * @buf: where to get the data from
2791 * @count: bytes sent
2792 * @ppos: where to start - must be 0
2795 static ssize_t smk_write_relabel_self(struct file *file, const char __user *buf,
2796 size_t count, loff_t *ppos)
2800 LIST_HEAD(list_tmp);
2803 * Must have privilege.
2805 if (!smack_privileged(CAP_MAC_ADMIN))
2809 * Enough data must be present.
2814 data = kzalloc(count + 1, GFP_KERNEL);
2818 if (copy_from_user(data, buf, count) != 0) {
2823 rc = smk_parse_label_list(data, &list_tmp);
2826 if (!rc || (rc == -EINVAL && list_empty(&list_tmp))) {
2828 struct task_smack *tsp;
2830 new = prepare_creds();
2835 tsp = new->security;
2836 smk_destroy_label_list(&tsp->smk_relabel);
2837 list_splice(&list_tmp, &tsp->smk_relabel);
2842 smk_destroy_label_list(&list_tmp);
2846 static const struct file_operations smk_relabel_self_ops = {
2847 .open = smk_open_relabel_self,
2849 .llseek = seq_lseek,
2850 .write = smk_write_relabel_self,
2851 .release = seq_release,
2855 * smk_read_ptrace - read() for /smack/ptrace
2856 * @filp: file pointer, not actually used
2857 * @buf: where to put the result
2858 * @count: maximum to send along
2859 * @ppos: where to start
2861 * Returns number of bytes read or error code, as appropriate
2863 static ssize_t smk_read_ptrace(struct file *filp, char __user *buf,
2864 size_t count, loff_t *ppos)
2872 sprintf(temp, "%d\n", smack_ptrace_rule);
2873 rc = simple_read_from_buffer(buf, count, ppos, temp, strlen(temp));
2878 * smk_write_ptrace - write() for /smack/ptrace
2879 * @file: file pointer
2880 * @buf: data from user space
2881 * @count: bytes sent
2882 * @ppos: where to start - must be 0
2884 static ssize_t smk_write_ptrace(struct file *file, const char __user *buf,
2885 size_t count, loff_t *ppos)
2890 if (!smack_privileged(CAP_MAC_ADMIN))
2893 if (*ppos != 0 || count >= sizeof(temp) || count == 0)
2896 if (copy_from_user(temp, buf, count) != 0)
2901 if (sscanf(temp, "%d", &i) != 1)
2903 if (i < SMACK_PTRACE_DEFAULT || i > SMACK_PTRACE_MAX)
2905 smack_ptrace_rule = i;
2910 static const struct file_operations smk_ptrace_ops = {
2911 .write = smk_write_ptrace,
2912 .read = smk_read_ptrace,
2913 .llseek = default_llseek,
2917 * smk_fill_super - fill the smackfs superblock
2918 * @sb: the empty superblock
2922 * Fill in the well known entries for the smack filesystem
2924 * Returns 0 on success, an error code on failure
2926 static int smk_fill_super(struct super_block *sb, void *data, int silent)
2929 struct inode *root_inode;
2931 static struct tree_descr smack_files[] = {
2933 "load", &smk_load_ops, S_IRUGO|S_IWUSR},
2935 "cipso", &smk_cipso_ops, S_IRUGO|S_IWUSR},
2937 "doi", &smk_doi_ops, S_IRUGO|S_IWUSR},
2939 "direct", &smk_direct_ops, S_IRUGO|S_IWUSR},
2941 "ambient", &smk_ambient_ops, S_IRUGO|S_IWUSR},
2943 "netlabel", &smk_net4addr_ops, S_IRUGO|S_IWUSR},
2945 "onlycap", &smk_onlycap_ops, S_IRUGO|S_IWUSR},
2947 "logging", &smk_logging_ops, S_IRUGO|S_IWUSR},
2949 "load-self", &smk_load_self_ops, S_IRUGO|S_IWUGO},
2951 "access", &smk_access_ops, S_IRUGO|S_IWUGO},
2953 "mapped", &smk_mapped_ops, S_IRUGO|S_IWUSR},
2955 "load2", &smk_load2_ops, S_IRUGO|S_IWUSR},
2956 [SMK_LOAD_SELF2] = {
2957 "load-self2", &smk_load_self2_ops, S_IRUGO|S_IWUGO},
2959 "access2", &smk_access2_ops, S_IRUGO|S_IWUGO},
2961 "cipso2", &smk_cipso2_ops, S_IRUGO|S_IWUSR},
2962 [SMK_REVOKE_SUBJ] = {
2963 "revoke-subject", &smk_revoke_subj_ops,
2965 [SMK_CHANGE_RULE] = {
2966 "change-rule", &smk_change_rule_ops, S_IRUGO|S_IWUSR},
2968 "syslog", &smk_syslog_ops, S_IRUGO|S_IWUSR},
2970 "ptrace", &smk_ptrace_ops, S_IRUGO|S_IWUSR},
2971 #ifdef CONFIG_SECURITY_SMACK_BRINGUP
2972 [SMK_UNCONFINED] = {
2973 "unconfined", &smk_unconfined_ops, S_IRUGO|S_IWUSR},
2975 #if IS_ENABLED(CONFIG_IPV6)
2977 "ipv6host", &smk_net6addr_ops, S_IRUGO|S_IWUSR},
2978 #endif /* CONFIG_IPV6 */
2979 [SMK_RELABEL_SELF] = {
2980 "relabel-self", &smk_relabel_self_ops,
2986 rc = simple_fill_super(sb, SMACK_MAGIC, smack_files);
2988 printk(KERN_ERR "%s failed %d while creating inodes\n",
2993 root_inode = d_inode(sb->s_root);
2999 * smk_mount - get the smackfs superblock
3000 * @fs_type: passed along without comment
3001 * @flags: passed along without comment
3002 * @dev_name: passed along without comment
3003 * @data: passed along without comment
3005 * Just passes everything along.
3007 * Returns what the lower level code does.
3009 static struct dentry *smk_mount(struct file_system_type *fs_type,
3010 int flags, const char *dev_name, void *data)
3012 return mount_single(fs_type, flags, data, smk_fill_super);
3015 static struct file_system_type smk_fs_type = {
3018 .kill_sb = kill_litter_super,
3021 static struct vfsmount *smackfs_mount;
3023 static int __init smk_preset_netlabel(struct smack_known *skp)
3025 skp->smk_netlabel.domain = skp->smk_known;
3026 skp->smk_netlabel.flags =
3027 NETLBL_SECATTR_DOMAIN | NETLBL_SECATTR_MLS_LVL;
3028 return smk_netlbl_mls(smack_cipso_direct, skp->smk_known,
3029 &skp->smk_netlabel, strlen(skp->smk_known));
3033 * init_smk_fs - get the smackfs superblock
3035 * register the smackfs
3037 * Do not register smackfs if Smack wasn't enabled
3038 * on boot. We can not put this method normally under the
3039 * smack_init() code path since the security subsystem get
3040 * initialized before the vfs caches.
3042 * Returns true if we were not chosen on boot or if
3043 * we were chosen and filesystem registration succeeded.
3045 static int __init init_smk_fs(void)
3050 if (smack_enabled == 0)
3053 err = smk_init_sysfs();
3055 printk(KERN_ERR "smackfs: sysfs mountpoint problem.\n");
3057 err = register_filesystem(&smk_fs_type);
3059 smackfs_mount = kern_mount(&smk_fs_type);
3060 if (IS_ERR(smackfs_mount)) {
3061 printk(KERN_ERR "smackfs: could not mount!\n");
3062 err = PTR_ERR(smackfs_mount);
3063 smackfs_mount = NULL;
3068 smk_unlbl_ambient(NULL);
3070 rc = smk_preset_netlabel(&smack_known_floor);
3071 if (err == 0 && rc < 0)
3073 rc = smk_preset_netlabel(&smack_known_hat);
3074 if (err == 0 && rc < 0)
3076 rc = smk_preset_netlabel(&smack_known_huh);
3077 if (err == 0 && rc < 0)
3079 rc = smk_preset_netlabel(&smack_known_invalid);
3080 if (err == 0 && rc < 0)
3082 rc = smk_preset_netlabel(&smack_known_star);
3083 if (err == 0 && rc < 0)
3085 rc = smk_preset_netlabel(&smack_known_web);
3086 if (err == 0 && rc < 0)
3092 __initcall(init_smk_fs);