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 = memdup_user_nul(buf, count);
502 return PTR_ERR(data);
505 * In case of parsing only part of user buf,
506 * avoid having partial rule at the data buffer
509 while (count > 0 && (data[count - 1] != '\n'))
518 tokens = (format == SMK_CHANGE_FMT ? 4 : 3);
519 while (cnt < count) {
520 if (format == SMK_FIXED24_FMT) {
521 rc = smk_parse_rule(data, &rule, 1);
526 rc = smk_parse_long_rule(data + cnt, &rule, 1, tokens);
536 if (rule_list == NULL)
537 rc = smk_set_access(&rule, &rule.smk_subject->smk_rules,
538 &rule.smk_subject->smk_rules_lock, 1);
540 rc = smk_set_access(&rule, rule_list, rule_lock, 0);
553 * Core logic for smackfs seq list operations.
556 static void *smk_seq_start(struct seq_file *s, loff_t *pos,
557 struct list_head *head)
559 struct list_head *list;
563 for (list = rcu_dereference(list_next_rcu(head));
565 list = rcu_dereference(list_next_rcu(list))) {
573 static void *smk_seq_next(struct seq_file *s, void *v, loff_t *pos,
574 struct list_head *head)
576 struct list_head *list = v;
579 list = rcu_dereference(list_next_rcu(list));
581 return (list == head) ? NULL : list;
584 static void smk_seq_stop(struct seq_file *s, void *v)
589 static void smk_rule_show(struct seq_file *s, struct smack_rule *srp, int max)
592 * Don't show any rules with label names too long for
593 * interface file (/smack/load or /smack/load2)
594 * because you should expect to be able to write
595 * anything you read back.
597 if (strlen(srp->smk_subject->smk_known) >= max ||
598 strlen(srp->smk_object->smk_known) >= max)
601 if (srp->smk_access == 0)
604 seq_printf(s, "%s %s",
605 srp->smk_subject->smk_known,
606 srp->smk_object->smk_known);
610 if (srp->smk_access & MAY_READ)
612 if (srp->smk_access & MAY_WRITE)
614 if (srp->smk_access & MAY_EXEC)
616 if (srp->smk_access & MAY_APPEND)
618 if (srp->smk_access & MAY_TRANSMUTE)
620 if (srp->smk_access & MAY_LOCK)
622 if (srp->smk_access & MAY_BRINGUP)
629 * Seq_file read operations for /smack/load
632 static void *load2_seq_start(struct seq_file *s, loff_t *pos)
634 return smk_seq_start(s, pos, &smack_rule_list);
637 static void *load2_seq_next(struct seq_file *s, void *v, loff_t *pos)
639 return smk_seq_next(s, v, pos, &smack_rule_list);
642 static int load_seq_show(struct seq_file *s, void *v)
644 struct list_head *list = v;
645 struct smack_master_list *smlp =
646 list_entry_rcu(list, struct smack_master_list, list);
648 smk_rule_show(s, smlp->smk_rule, SMK_LABELLEN);
653 static const struct seq_operations load_seq_ops = {
654 .start = load2_seq_start,
655 .next = load2_seq_next,
656 .show = load_seq_show,
657 .stop = smk_seq_stop,
661 * smk_open_load - open() for /smack/load
662 * @inode: inode structure representing file
663 * @file: "load" file pointer
665 * For reading, use load_seq_* seq_file reading operations.
667 static int smk_open_load(struct inode *inode, struct file *file)
669 return seq_open(file, &load_seq_ops);
673 * smk_write_load - write() for /smack/load
674 * @file: file pointer, not actually used
675 * @buf: where to get the data from
677 * @ppos: where to start - must be 0
680 static ssize_t smk_write_load(struct file *file, const char __user *buf,
681 size_t count, loff_t *ppos)
684 * Must have privilege.
686 * Enough data must be present.
688 if (!smack_privileged(CAP_MAC_ADMIN))
691 return smk_write_rules_list(file, buf, count, ppos, NULL, NULL,
695 static const struct file_operations smk_load_ops = {
696 .open = smk_open_load,
699 .write = smk_write_load,
700 .release = seq_release,
704 * smk_cipso_doi - initialize the CIPSO domain
706 static void smk_cipso_doi(void)
709 struct cipso_v4_doi *doip;
710 struct netlbl_audit nai;
712 smk_netlabel_audit_set(&nai);
714 rc = netlbl_cfg_map_del(NULL, PF_INET, NULL, NULL, &nai);
716 printk(KERN_WARNING "%s:%d remove rc = %d\n",
717 __func__, __LINE__, rc);
719 doip = kmalloc(sizeof(struct cipso_v4_doi), GFP_KERNEL);
721 panic("smack: Failed to initialize cipso DOI.\n");
722 doip->map.std = NULL;
723 doip->doi = smk_cipso_doi_value;
724 doip->type = CIPSO_V4_MAP_PASS;
725 doip->tags[0] = CIPSO_V4_TAG_RBITMAP;
726 for (rc = 1; rc < CIPSO_V4_TAG_MAXCNT; rc++)
727 doip->tags[rc] = CIPSO_V4_TAG_INVALID;
729 rc = netlbl_cfg_cipsov4_add(doip, &nai);
731 printk(KERN_WARNING "%s:%d cipso add rc = %d\n",
732 __func__, __LINE__, rc);
736 rc = netlbl_cfg_cipsov4_map_add(doip->doi, NULL, NULL, NULL, &nai);
738 printk(KERN_WARNING "%s:%d map add rc = %d\n",
739 __func__, __LINE__, rc);
746 * smk_unlbl_ambient - initialize the unlabeled domain
747 * @oldambient: previous domain string
749 static void smk_unlbl_ambient(char *oldambient)
752 struct netlbl_audit nai;
754 smk_netlabel_audit_set(&nai);
756 if (oldambient != NULL) {
757 rc = netlbl_cfg_map_del(oldambient, PF_INET, NULL, NULL, &nai);
759 printk(KERN_WARNING "%s:%d remove rc = %d\n",
760 __func__, __LINE__, rc);
762 if (smack_net_ambient == NULL)
763 smack_net_ambient = &smack_known_floor;
765 rc = netlbl_cfg_unlbl_map_add(smack_net_ambient->smk_known, PF_INET,
768 printk(KERN_WARNING "%s:%d add rc = %d\n",
769 __func__, __LINE__, rc);
773 * Seq_file read operations for /smack/cipso
776 static void *cipso_seq_start(struct seq_file *s, loff_t *pos)
778 return smk_seq_start(s, pos, &smack_known_list);
781 static void *cipso_seq_next(struct seq_file *s, void *v, loff_t *pos)
783 return smk_seq_next(s, v, pos, &smack_known_list);
787 * Print cipso labels in format:
788 * label level[/cat[,cat]]
790 static int cipso_seq_show(struct seq_file *s, void *v)
792 struct list_head *list = v;
793 struct smack_known *skp =
794 list_entry_rcu(list, struct smack_known, list);
795 struct netlbl_lsm_catmap *cmp = skp->smk_netlabel.attr.mls.cat;
800 * Don't show a label that could not have been set using
801 * /smack/cipso. This is in support of the notion that
802 * anything read from /smack/cipso ought to be writeable
805 * /smack/cipso2 should be used instead.
807 if (strlen(skp->smk_known) >= SMK_LABELLEN)
810 seq_printf(s, "%s %3d", skp->smk_known, skp->smk_netlabel.attr.mls.lvl);
812 for (i = netlbl_catmap_walk(cmp, 0); i >= 0;
813 i = netlbl_catmap_walk(cmp, i + 1)) {
814 seq_printf(s, "%c%d", sep, i);
823 static const struct seq_operations cipso_seq_ops = {
824 .start = cipso_seq_start,
825 .next = cipso_seq_next,
826 .show = cipso_seq_show,
827 .stop = smk_seq_stop,
831 * smk_open_cipso - open() for /smack/cipso
832 * @inode: inode structure representing file
833 * @file: "cipso" file pointer
835 * Connect our cipso_seq_* operations with /smack/cipso
838 static int smk_open_cipso(struct inode *inode, struct file *file)
840 return seq_open(file, &cipso_seq_ops);
844 * smk_set_cipso - do the work for write() for cipso and cipso2
845 * @file: file pointer, not actually used
846 * @buf: where to get the data from
848 * @ppos: where to start
849 * @format: /smack/cipso or /smack/cipso2
851 * Accepts only one cipso rule per write call.
852 * Returns number of bytes written or error code, as appropriate
854 static ssize_t smk_set_cipso(struct file *file, const char __user *buf,
855 size_t count, loff_t *ppos, int format)
857 struct smack_known *skp;
858 struct netlbl_lsm_secattr ncats;
859 char mapcatset[SMK_CIPSOLEN];
863 ssize_t rc = -EINVAL;
870 * Must have privilege.
872 * Enough data must be present.
874 if (!smack_privileged(CAP_MAC_ADMIN))
878 if (format == SMK_FIXED24_FMT &&
879 (count < SMK_CIPSOMIN || count > SMK_CIPSOMAX))
881 if (count > PAGE_SIZE)
884 data = memdup_user_nul(buf, count);
886 return PTR_ERR(data);
890 * Only allow one writer at a time. Writes should be
891 * quite rare and small in any case.
893 mutex_lock(&smack_cipso_lock);
895 skp = smk_import_entry(rule, 0);
901 if (format == SMK_FIXED24_FMT)
902 rule += SMK_LABELLEN;
904 rule += strlen(skp->smk_known) + 1;
906 if (rule > data + count) {
911 ret = sscanf(rule, "%d", &maplevel);
912 if (ret != 1 || maplevel < 0 || maplevel > SMACK_CIPSO_MAXLEVEL)
915 rule += SMK_DIGITLEN;
916 if (rule > data + count) {
921 ret = sscanf(rule, "%d", &catlen);
922 if (ret != 1 || catlen > SMACK_CIPSO_MAXCATNUM)
925 if (format == SMK_FIXED24_FMT &&
926 count != (SMK_CIPSOMIN + catlen * SMK_DIGITLEN))
929 memset(mapcatset, 0, sizeof(mapcatset));
931 for (i = 0; i < catlen; i++) {
932 rule += SMK_DIGITLEN;
933 if (rule > data + count) {
937 ret = sscanf(rule, "%u", &cat);
938 if (ret != 1 || cat > SMACK_CIPSO_MAXCATNUM)
941 smack_catset_bit(cat, mapcatset);
944 rc = smk_netlbl_mls(maplevel, mapcatset, &ncats, SMK_CIPSOLEN);
946 netlbl_catmap_free(skp->smk_netlabel.attr.mls.cat);
947 skp->smk_netlabel.attr.mls.cat = ncats.attr.mls.cat;
948 skp->smk_netlabel.attr.mls.lvl = ncats.attr.mls.lvl;
953 mutex_unlock(&smack_cipso_lock);
959 * smk_write_cipso - write() for /smack/cipso
960 * @file: file pointer, not actually used
961 * @buf: where to get the data from
963 * @ppos: where to start
965 * Accepts only one cipso rule per write call.
966 * Returns number of bytes written or error code, as appropriate
968 static ssize_t smk_write_cipso(struct file *file, const char __user *buf,
969 size_t count, loff_t *ppos)
971 return smk_set_cipso(file, buf, count, ppos, SMK_FIXED24_FMT);
974 static const struct file_operations smk_cipso_ops = {
975 .open = smk_open_cipso,
978 .write = smk_write_cipso,
979 .release = seq_release,
983 * Seq_file read operations for /smack/cipso2
987 * Print cipso labels in format:
988 * label level[/cat[,cat]]
990 static int cipso2_seq_show(struct seq_file *s, void *v)
992 struct list_head *list = v;
993 struct smack_known *skp =
994 list_entry_rcu(list, struct smack_known, list);
995 struct netlbl_lsm_catmap *cmp = skp->smk_netlabel.attr.mls.cat;
999 seq_printf(s, "%s %3d", skp->smk_known, skp->smk_netlabel.attr.mls.lvl);
1001 for (i = netlbl_catmap_walk(cmp, 0); i >= 0;
1002 i = netlbl_catmap_walk(cmp, i + 1)) {
1003 seq_printf(s, "%c%d", sep, i);
1012 static const struct seq_operations cipso2_seq_ops = {
1013 .start = cipso_seq_start,
1014 .next = cipso_seq_next,
1015 .show = cipso2_seq_show,
1016 .stop = smk_seq_stop,
1020 * smk_open_cipso2 - open() for /smack/cipso2
1021 * @inode: inode structure representing file
1022 * @file: "cipso2" file pointer
1024 * Connect our cipso_seq_* operations with /smack/cipso2
1027 static int smk_open_cipso2(struct inode *inode, struct file *file)
1029 return seq_open(file, &cipso2_seq_ops);
1033 * smk_write_cipso2 - write() for /smack/cipso2
1034 * @file: file pointer, not actually used
1035 * @buf: where to get the data from
1036 * @count: bytes sent
1037 * @ppos: where to start
1039 * Accepts only one cipso rule per write call.
1040 * Returns number of bytes written or error code, as appropriate
1042 static ssize_t smk_write_cipso2(struct file *file, const char __user *buf,
1043 size_t count, loff_t *ppos)
1045 return smk_set_cipso(file, buf, count, ppos, SMK_LONG_FMT);
1048 static const struct file_operations smk_cipso2_ops = {
1049 .open = smk_open_cipso2,
1051 .llseek = seq_lseek,
1052 .write = smk_write_cipso2,
1053 .release = seq_release,
1057 * Seq_file read operations for /smack/netlabel
1060 static void *net4addr_seq_start(struct seq_file *s, loff_t *pos)
1062 return smk_seq_start(s, pos, &smk_net4addr_list);
1065 static void *net4addr_seq_next(struct seq_file *s, void *v, loff_t *pos)
1067 return smk_seq_next(s, v, pos, &smk_net4addr_list);
1071 * Print host/label pairs
1073 static int net4addr_seq_show(struct seq_file *s, void *v)
1075 struct list_head *list = v;
1076 struct smk_net4addr *skp =
1077 list_entry_rcu(list, struct smk_net4addr, list);
1078 char *kp = SMACK_CIPSO_OPTION;
1080 if (skp->smk_label != NULL)
1081 kp = skp->smk_label->smk_known;
1082 seq_printf(s, "%pI4/%d %s\n", &skp->smk_host.s_addr,
1083 skp->smk_masks, kp);
1088 static const struct seq_operations net4addr_seq_ops = {
1089 .start = net4addr_seq_start,
1090 .next = net4addr_seq_next,
1091 .show = net4addr_seq_show,
1092 .stop = smk_seq_stop,
1096 * smk_open_net4addr - open() for /smack/netlabel
1097 * @inode: inode structure representing file
1098 * @file: "netlabel" file pointer
1100 * Connect our net4addr_seq_* operations with /smack/netlabel
1103 static int smk_open_net4addr(struct inode *inode, struct file *file)
1105 return seq_open(file, &net4addr_seq_ops);
1109 * smk_net4addr_insert
1110 * @new : netlabel to insert
1112 * This helper insert netlabel in the smack_net4addrs list
1113 * sorted by netmask length (longest to smallest)
1114 * locked by &smk_net4addr_lock in smk_write_net4addr
1117 static void smk_net4addr_insert(struct smk_net4addr *new)
1119 struct smk_net4addr *m;
1120 struct smk_net4addr *m_next;
1122 if (list_empty(&smk_net4addr_list)) {
1123 list_add_rcu(&new->list, &smk_net4addr_list);
1127 m = list_entry_rcu(smk_net4addr_list.next,
1128 struct smk_net4addr, list);
1130 /* the comparison '>' is a bit hacky, but works */
1131 if (new->smk_masks > m->smk_masks) {
1132 list_add_rcu(&new->list, &smk_net4addr_list);
1136 list_for_each_entry_rcu(m, &smk_net4addr_list, list) {
1137 if (list_is_last(&m->list, &smk_net4addr_list)) {
1138 list_add_rcu(&new->list, &m->list);
1141 m_next = list_entry_rcu(m->list.next,
1142 struct smk_net4addr, list);
1143 if (new->smk_masks > m_next->smk_masks) {
1144 list_add_rcu(&new->list, &m->list);
1152 * smk_write_net4addr - write() for /smack/netlabel
1153 * @file: file pointer, not actually used
1154 * @buf: where to get the data from
1155 * @count: bytes sent
1156 * @ppos: where to start
1158 * Accepts only one net4addr per write call.
1159 * Returns number of bytes written or error code, as appropriate
1161 static ssize_t smk_write_net4addr(struct file *file, const char __user *buf,
1162 size_t count, loff_t *ppos)
1164 struct smk_net4addr *snp;
1165 struct sockaddr_in newname;
1167 struct smack_known *skp = NULL;
1169 char *host = (char *)&newname.sin_addr.s_addr;
1171 struct netlbl_audit audit_info;
1172 struct in_addr mask;
1176 u32 mask_bits = (1<<31);
1181 * Must have privilege.
1182 * No partial writes.
1183 * Enough data must be present.
1184 * "<addr/mask, as a.b.c.d/e><space><label>"
1185 * "<addr, as a.b.c.d><space><label>"
1187 if (!smack_privileged(CAP_MAC_ADMIN))
1191 if (count < SMK_NETLBLADDRMIN || count > PAGE_SIZE - 1)
1194 data = memdup_user_nul(buf, count);
1196 return PTR_ERR(data);
1198 smack = kzalloc(count + 1, GFP_KERNEL);
1199 if (smack == NULL) {
1204 rc = sscanf(data, "%hhd.%hhd.%hhd.%hhd/%u %s",
1205 &host[0], &host[1], &host[2], &host[3], &masks, smack);
1207 rc = sscanf(data, "%hhd.%hhd.%hhd.%hhd %s",
1208 &host[0], &host[1], &host[2], &host[3], smack);
1216 if (masks > BEBITS) {
1222 * If smack begins with '-', it is an option, don't import it
1224 if (smack[0] != '-') {
1225 skp = smk_import_entry(smack, 0);
1232 * Only the -CIPSO option is supported for IPv4
1234 if (strcmp(smack, SMACK_CIPSO_OPTION) != 0) {
1240 for (m = masks, temp_mask = 0; m > 0; m--) {
1241 temp_mask |= mask_bits;
1244 mask.s_addr = cpu_to_be32(temp_mask);
1246 newname.sin_addr.s_addr &= mask.s_addr;
1248 * Only allow one writer at a time. Writes should be
1249 * quite rare and small in any case.
1251 mutex_lock(&smk_net4addr_lock);
1253 nsa = newname.sin_addr.s_addr;
1254 /* try to find if the prefix is already in the list */
1256 list_for_each_entry_rcu(snp, &smk_net4addr_list, list) {
1257 if (snp->smk_host.s_addr == nsa && snp->smk_masks == masks) {
1262 smk_netlabel_audit_set(&audit_info);
1265 snp = kzalloc(sizeof(*snp), GFP_KERNEL);
1270 snp->smk_host.s_addr = newname.sin_addr.s_addr;
1271 snp->smk_mask.s_addr = mask.s_addr;
1272 snp->smk_label = skp;
1273 snp->smk_masks = masks;
1274 smk_net4addr_insert(snp);
1278 * Delete the unlabeled entry, only if the previous label
1279 * wasn't the special CIPSO option
1281 if (snp->smk_label != NULL)
1282 rc = netlbl_cfg_unlbl_static_del(&init_net, NULL,
1283 &snp->smk_host, &snp->smk_mask,
1284 PF_INET, &audit_info);
1287 snp->smk_label = skp;
1291 * Now tell netlabel about the single label nature of
1292 * this host so that incoming packets get labeled.
1293 * but only if we didn't get the special CIPSO option
1295 if (rc == 0 && skp != NULL)
1296 rc = netlbl_cfg_unlbl_static_add(&init_net, NULL,
1297 &snp->smk_host, &snp->smk_mask, PF_INET,
1298 snp->smk_label->smk_secid, &audit_info);
1303 mutex_unlock(&smk_net4addr_lock);
1313 static const struct file_operations smk_net4addr_ops = {
1314 .open = smk_open_net4addr,
1316 .llseek = seq_lseek,
1317 .write = smk_write_net4addr,
1318 .release = seq_release,
1321 #if IS_ENABLED(CONFIG_IPV6)
1323 * Seq_file read operations for /smack/netlabel6
1326 static void *net6addr_seq_start(struct seq_file *s, loff_t *pos)
1328 return smk_seq_start(s, pos, &smk_net6addr_list);
1331 static void *net6addr_seq_next(struct seq_file *s, void *v, loff_t *pos)
1333 return smk_seq_next(s, v, pos, &smk_net6addr_list);
1337 * Print host/label pairs
1339 static int net6addr_seq_show(struct seq_file *s, void *v)
1341 struct list_head *list = v;
1342 struct smk_net6addr *skp =
1343 list_entry(list, struct smk_net6addr, list);
1345 if (skp->smk_label != NULL)
1346 seq_printf(s, "%pI6/%d %s\n", &skp->smk_host, skp->smk_masks,
1347 skp->smk_label->smk_known);
1352 static const struct seq_operations net6addr_seq_ops = {
1353 .start = net6addr_seq_start,
1354 .next = net6addr_seq_next,
1355 .show = net6addr_seq_show,
1356 .stop = smk_seq_stop,
1360 * smk_open_net6addr - open() for /smack/netlabel
1361 * @inode: inode structure representing file
1362 * @file: "netlabel" file pointer
1364 * Connect our net6addr_seq_* operations with /smack/netlabel
1367 static int smk_open_net6addr(struct inode *inode, struct file *file)
1369 return seq_open(file, &net6addr_seq_ops);
1373 * smk_net6addr_insert
1374 * @new : entry to insert
1376 * This inserts an entry in the smack_net6addrs list
1377 * sorted by netmask length (longest to smallest)
1378 * locked by &smk_net6addr_lock in smk_write_net6addr
1381 static void smk_net6addr_insert(struct smk_net6addr *new)
1383 struct smk_net6addr *m_next;
1384 struct smk_net6addr *m;
1386 if (list_empty(&smk_net6addr_list)) {
1387 list_add_rcu(&new->list, &smk_net6addr_list);
1391 m = list_entry_rcu(smk_net6addr_list.next,
1392 struct smk_net6addr, list);
1394 if (new->smk_masks > m->smk_masks) {
1395 list_add_rcu(&new->list, &smk_net6addr_list);
1399 list_for_each_entry_rcu(m, &smk_net6addr_list, list) {
1400 if (list_is_last(&m->list, &smk_net6addr_list)) {
1401 list_add_rcu(&new->list, &m->list);
1404 m_next = list_entry_rcu(m->list.next,
1405 struct smk_net6addr, list);
1406 if (new->smk_masks > m_next->smk_masks) {
1407 list_add_rcu(&new->list, &m->list);
1415 * smk_write_net6addr - write() for /smack/netlabel
1416 * @file: file pointer, not actually used
1417 * @buf: where to get the data from
1418 * @count: bytes sent
1419 * @ppos: where to start
1421 * Accepts only one net6addr per write call.
1422 * Returns number of bytes written or error code, as appropriate
1424 static ssize_t smk_write_net6addr(struct file *file, const char __user *buf,
1425 size_t count, loff_t *ppos)
1427 struct smk_net6addr *snp;
1428 struct in6_addr newname;
1429 struct in6_addr fullmask;
1430 struct smack_known *skp = NULL;
1436 unsigned int scanned[8];
1438 unsigned int mask = 128;
1441 * Must have privilege.
1442 * No partial writes.
1443 * Enough data must be present.
1444 * "<addr/mask, as a:b:c:d:e:f:g:h/e><space><label>"
1445 * "<addr, as a:b:c:d:e:f:g:h><space><label>"
1447 if (!smack_privileged(CAP_MAC_ADMIN))
1451 if (count < SMK_NETLBLADDRMIN || count > PAGE_SIZE - 1)
1454 data = memdup_user_nul(buf, count);
1456 return PTR_ERR(data);
1458 smack = kzalloc(count + 1, GFP_KERNEL);
1459 if (smack == NULL) {
1464 i = sscanf(data, "%x:%x:%x:%x:%x:%x:%x:%x/%u %s",
1465 &scanned[0], &scanned[1], &scanned[2], &scanned[3],
1466 &scanned[4], &scanned[5], &scanned[6], &scanned[7],
1469 i = sscanf(data, "%x:%x:%x:%x:%x:%x:%x:%x %s",
1470 &scanned[0], &scanned[1], &scanned[2],
1471 &scanned[3], &scanned[4], &scanned[5],
1472 &scanned[6], &scanned[7], smack);
1482 for (i = 0; i < 8; i++) {
1483 if (scanned[i] > 0xffff) {
1487 newname.s6_addr16[i] = htons(scanned[i]);
1491 * If smack begins with '-', it is an option, don't import it
1493 if (smack[0] != '-') {
1494 skp = smk_import_entry(smack, 0);
1501 * Only -DELETE is supported for IPv6
1503 if (strcmp(smack, SMACK_DELETE_OPTION) != 0) {
1509 for (i = 0, m = mask; i < 8; i++) {
1511 fullmask.s6_addr16[i] = 0xffff;
1514 fullmask.s6_addr16[i] = (1 << m) - 1;
1517 fullmask.s6_addr16[i] = 0;
1518 newname.s6_addr16[i] &= fullmask.s6_addr16[i];
1522 * Only allow one writer at a time. Writes should be
1523 * quite rare and small in any case.
1525 mutex_lock(&smk_net6addr_lock);
1527 * Try to find the prefix in the list
1529 list_for_each_entry_rcu(snp, &smk_net6addr_list, list) {
1530 if (mask != snp->smk_masks)
1532 for (found = 1, i = 0; i < 8; i++) {
1533 if (newname.s6_addr16[i] !=
1534 snp->smk_host.s6_addr16[i]) {
1543 snp = kzalloc(sizeof(*snp), GFP_KERNEL);
1547 snp->smk_host = newname;
1548 snp->smk_mask = fullmask;
1549 snp->smk_masks = mask;
1550 snp->smk_label = skp;
1551 smk_net6addr_insert(snp);
1554 snp->smk_label = skp;
1560 mutex_unlock(&smk_net6addr_lock);
1570 static const struct file_operations smk_net6addr_ops = {
1571 .open = smk_open_net6addr,
1573 .llseek = seq_lseek,
1574 .write = smk_write_net6addr,
1575 .release = seq_release,
1577 #endif /* CONFIG_IPV6 */
1580 * smk_read_doi - read() for /smack/doi
1581 * @filp: file pointer, not actually used
1582 * @buf: where to put the result
1583 * @count: maximum to send along
1584 * @ppos: where to start
1586 * Returns number of bytes read or error code, as appropriate
1588 static ssize_t smk_read_doi(struct file *filp, char __user *buf,
1589 size_t count, loff_t *ppos)
1597 sprintf(temp, "%d", smk_cipso_doi_value);
1598 rc = simple_read_from_buffer(buf, count, ppos, temp, strlen(temp));
1604 * smk_write_doi - write() for /smack/doi
1605 * @file: file pointer, not actually used
1606 * @buf: where to get the data from
1607 * @count: bytes sent
1608 * @ppos: where to start
1610 * Returns number of bytes written or error code, as appropriate
1612 static ssize_t smk_write_doi(struct file *file, const char __user *buf,
1613 size_t count, loff_t *ppos)
1618 if (!smack_privileged(CAP_MAC_ADMIN))
1621 if (count >= sizeof(temp) || count == 0)
1624 if (copy_from_user(temp, buf, count) != 0)
1629 if (sscanf(temp, "%d", &i) != 1)
1632 smk_cipso_doi_value = i;
1639 static const struct file_operations smk_doi_ops = {
1640 .read = smk_read_doi,
1641 .write = smk_write_doi,
1642 .llseek = default_llseek,
1646 * smk_read_direct - read() for /smack/direct
1647 * @filp: file pointer, not actually used
1648 * @buf: where to put the result
1649 * @count: maximum to send along
1650 * @ppos: where to start
1652 * Returns number of bytes read or error code, as appropriate
1654 static ssize_t smk_read_direct(struct file *filp, char __user *buf,
1655 size_t count, loff_t *ppos)
1663 sprintf(temp, "%d", smack_cipso_direct);
1664 rc = simple_read_from_buffer(buf, count, ppos, temp, strlen(temp));
1670 * smk_write_direct - write() for /smack/direct
1671 * @file: file pointer, not actually used
1672 * @buf: where to get the data from
1673 * @count: bytes sent
1674 * @ppos: where to start
1676 * Returns number of bytes written or error code, as appropriate
1678 static ssize_t smk_write_direct(struct file *file, const char __user *buf,
1679 size_t count, loff_t *ppos)
1681 struct smack_known *skp;
1685 if (!smack_privileged(CAP_MAC_ADMIN))
1688 if (count >= sizeof(temp) || count == 0)
1691 if (copy_from_user(temp, buf, count) != 0)
1696 if (sscanf(temp, "%d", &i) != 1)
1700 * Don't do anything if the value hasn't actually changed.
1701 * If it is changing reset the level on entries that were
1702 * set up to be direct when they were created.
1704 if (smack_cipso_direct != i) {
1705 mutex_lock(&smack_known_lock);
1706 list_for_each_entry_rcu(skp, &smack_known_list, list)
1707 if (skp->smk_netlabel.attr.mls.lvl ==
1709 skp->smk_netlabel.attr.mls.lvl = i;
1710 smack_cipso_direct = i;
1711 mutex_unlock(&smack_known_lock);
1717 static const struct file_operations smk_direct_ops = {
1718 .read = smk_read_direct,
1719 .write = smk_write_direct,
1720 .llseek = default_llseek,
1724 * smk_read_mapped - read() for /smack/mapped
1725 * @filp: file pointer, not actually used
1726 * @buf: where to put the result
1727 * @count: maximum to send along
1728 * @ppos: where to start
1730 * Returns number of bytes read or error code, as appropriate
1732 static ssize_t smk_read_mapped(struct file *filp, char __user *buf,
1733 size_t count, loff_t *ppos)
1741 sprintf(temp, "%d", smack_cipso_mapped);
1742 rc = simple_read_from_buffer(buf, count, ppos, temp, strlen(temp));
1748 * smk_write_mapped - write() for /smack/mapped
1749 * @file: file pointer, not actually used
1750 * @buf: where to get the data from
1751 * @count: bytes sent
1752 * @ppos: where to start
1754 * Returns number of bytes written or error code, as appropriate
1756 static ssize_t smk_write_mapped(struct file *file, const char __user *buf,
1757 size_t count, loff_t *ppos)
1759 struct smack_known *skp;
1763 if (!smack_privileged(CAP_MAC_ADMIN))
1766 if (count >= sizeof(temp) || count == 0)
1769 if (copy_from_user(temp, buf, count) != 0)
1774 if (sscanf(temp, "%d", &i) != 1)
1778 * Don't do anything if the value hasn't actually changed.
1779 * If it is changing reset the level on entries that were
1780 * set up to be mapped when they were created.
1782 if (smack_cipso_mapped != i) {
1783 mutex_lock(&smack_known_lock);
1784 list_for_each_entry_rcu(skp, &smack_known_list, list)
1785 if (skp->smk_netlabel.attr.mls.lvl ==
1787 skp->smk_netlabel.attr.mls.lvl = i;
1788 smack_cipso_mapped = i;
1789 mutex_unlock(&smack_known_lock);
1795 static const struct file_operations smk_mapped_ops = {
1796 .read = smk_read_mapped,
1797 .write = smk_write_mapped,
1798 .llseek = default_llseek,
1802 * smk_read_ambient - read() for /smack/ambient
1803 * @filp: file pointer, not actually used
1804 * @buf: where to put the result
1805 * @cn: maximum to send along
1806 * @ppos: where to start
1808 * Returns number of bytes read or error code, as appropriate
1810 static ssize_t smk_read_ambient(struct file *filp, char __user *buf,
1811 size_t cn, loff_t *ppos)
1819 * Being careful to avoid a problem in the case where
1820 * smack_net_ambient gets changed in midstream.
1822 mutex_lock(&smack_ambient_lock);
1824 asize = strlen(smack_net_ambient->smk_known) + 1;
1827 rc = simple_read_from_buffer(buf, cn, ppos,
1828 smack_net_ambient->smk_known,
1833 mutex_unlock(&smack_ambient_lock);
1839 * smk_write_ambient - write() for /smack/ambient
1840 * @file: file pointer, not actually used
1841 * @buf: where to get the data from
1842 * @count: bytes sent
1843 * @ppos: where to start
1845 * Returns number of bytes written or error code, as appropriate
1847 static ssize_t smk_write_ambient(struct file *file, const char __user *buf,
1848 size_t count, loff_t *ppos)
1850 struct smack_known *skp;
1855 if (!smack_privileged(CAP_MAC_ADMIN))
1858 /* Enough data must be present */
1859 if (count == 0 || count > PAGE_SIZE)
1862 data = memdup_user_nul(buf, count);
1864 return PTR_ERR(data);
1866 skp = smk_import_entry(data, count);
1872 mutex_lock(&smack_ambient_lock);
1874 oldambient = smack_net_ambient->smk_known;
1875 smack_net_ambient = skp;
1876 smk_unlbl_ambient(oldambient);
1878 mutex_unlock(&smack_ambient_lock);
1885 static const struct file_operations smk_ambient_ops = {
1886 .read = smk_read_ambient,
1887 .write = smk_write_ambient,
1888 .llseek = default_llseek,
1892 * Seq_file operations for /smack/onlycap
1894 static void *onlycap_seq_start(struct seq_file *s, loff_t *pos)
1896 return smk_seq_start(s, pos, &smack_onlycap_list);
1899 static void *onlycap_seq_next(struct seq_file *s, void *v, loff_t *pos)
1901 return smk_seq_next(s, v, pos, &smack_onlycap_list);
1904 static int onlycap_seq_show(struct seq_file *s, void *v)
1906 struct list_head *list = v;
1907 struct smack_known_list_elem *sklep =
1908 list_entry_rcu(list, struct smack_known_list_elem, list);
1910 seq_puts(s, sklep->smk_label->smk_known);
1916 static const struct seq_operations onlycap_seq_ops = {
1917 .start = onlycap_seq_start,
1918 .next = onlycap_seq_next,
1919 .show = onlycap_seq_show,
1920 .stop = smk_seq_stop,
1923 static int smk_open_onlycap(struct inode *inode, struct file *file)
1925 return seq_open(file, &onlycap_seq_ops);
1929 * smk_list_swap_rcu - swap public list with a private one in RCU-safe way
1930 * The caller must hold appropriate mutex to prevent concurrent modifications
1931 * to the public list.
1932 * Private list is assumed to be not accessible to other threads yet.
1934 * @public: public list
1935 * @private: private list
1937 static void smk_list_swap_rcu(struct list_head *public,
1938 struct list_head *private)
1940 struct list_head *first, *last;
1942 if (list_empty(public)) {
1943 list_splice_init_rcu(private, public, synchronize_rcu);
1945 /* Remember public list before replacing it */
1946 first = public->next;
1947 last = public->prev;
1949 /* Publish private list in place of public in RCU-safe way */
1950 private->prev->next = public;
1951 private->next->prev = public;
1952 rcu_assign_pointer(public->next, private->next);
1953 public->prev = private->prev;
1957 /* When all readers are done with the old public list,
1958 * attach it in place of private */
1959 private->next = first;
1960 private->prev = last;
1961 first->prev = private;
1962 last->next = private;
1967 * smk_parse_label_list - parse list of Smack labels, separated by spaces
1969 * @data: the string to parse
1970 * @private: destination list
1972 * Returns zero on success or error code, as appropriate
1974 static int smk_parse_label_list(char *data, struct list_head *list)
1977 struct smack_known *skp;
1978 struct smack_known_list_elem *sklep;
1980 while ((tok = strsep(&data, " ")) != NULL) {
1984 skp = smk_import_entry(tok, 0);
1986 return PTR_ERR(skp);
1988 sklep = kzalloc(sizeof(*sklep), GFP_KERNEL);
1992 sklep->smk_label = skp;
1993 list_add(&sklep->list, list);
2000 * smk_destroy_label_list - destroy a list of smack_known_list_elem
2001 * @head: header pointer of the list to destroy
2003 void smk_destroy_label_list(struct list_head *list)
2005 struct smack_known_list_elem *sklep;
2006 struct smack_known_list_elem *sklep2;
2008 list_for_each_entry_safe(sklep, sklep2, list, list)
2011 INIT_LIST_HEAD(list);
2015 * smk_write_onlycap - write() for smackfs/onlycap
2016 * @file: file pointer, not actually used
2017 * @buf: where to get the data from
2018 * @count: bytes sent
2019 * @ppos: where to start
2021 * Returns number of bytes written or error code, as appropriate
2023 static ssize_t smk_write_onlycap(struct file *file, const char __user *buf,
2024 size_t count, loff_t *ppos)
2027 LIST_HEAD(list_tmp);
2030 if (!smack_privileged(CAP_MAC_ADMIN))
2033 if (count > PAGE_SIZE)
2036 data = memdup_user_nul(buf, count);
2038 return PTR_ERR(data);
2040 rc = smk_parse_label_list(data, &list_tmp);
2044 * Clear the smack_onlycap on invalid label errors. This means
2045 * that we can pass a null string to unset the onlycap value.
2047 * Importing will also reject a label beginning with '-',
2048 * so "-usecapabilities" will also work.
2050 * But do so only on invalid label, not on system errors.
2051 * The invalid label must be first to count as clearing attempt.
2053 if (!rc || (rc == -EINVAL && list_empty(&list_tmp))) {
2054 mutex_lock(&smack_onlycap_lock);
2055 smk_list_swap_rcu(&smack_onlycap_list, &list_tmp);
2056 mutex_unlock(&smack_onlycap_lock);
2060 smk_destroy_label_list(&list_tmp);
2065 static const struct file_operations smk_onlycap_ops = {
2066 .open = smk_open_onlycap,
2068 .write = smk_write_onlycap,
2069 .llseek = seq_lseek,
2070 .release = seq_release,
2073 #ifdef CONFIG_SECURITY_SMACK_BRINGUP
2075 * smk_read_unconfined - read() for smackfs/unconfined
2076 * @filp: file pointer, not actually used
2077 * @buf: where to put the result
2078 * @cn: maximum to send along
2079 * @ppos: where to start
2081 * Returns number of bytes read or error code, as appropriate
2083 static ssize_t smk_read_unconfined(struct file *filp, char __user *buf,
2084 size_t cn, loff_t *ppos)
2087 ssize_t rc = -EINVAL;
2093 if (smack_unconfined != NULL)
2094 smack = smack_unconfined->smk_known;
2096 asize = strlen(smack) + 1;
2099 rc = simple_read_from_buffer(buf, cn, ppos, smack, asize);
2105 * smk_write_unconfined - write() for smackfs/unconfined
2106 * @file: file pointer, not actually used
2107 * @buf: where to get the data from
2108 * @count: bytes sent
2109 * @ppos: where to start
2111 * Returns number of bytes written or error code, as appropriate
2113 static ssize_t smk_write_unconfined(struct file *file, const char __user *buf,
2114 size_t count, loff_t *ppos)
2117 struct smack_known *skp;
2120 if (!smack_privileged(CAP_MAC_ADMIN))
2123 if (count > PAGE_SIZE)
2126 data = memdup_user_nul(buf, count);
2128 return PTR_ERR(data);
2131 * Clear the smack_unconfined on invalid label errors. This means
2132 * that we can pass a null string to unset the unconfined value.
2134 * Importing will also reject a label beginning with '-',
2135 * so "-confine" will also work.
2137 * But do so only on invalid label, not on system errors.
2139 skp = smk_import_entry(data, count);
2140 if (PTR_ERR(skp) == -EINVAL)
2142 else if (IS_ERR(skp)) {
2147 smack_unconfined = skp;
2154 static const struct file_operations smk_unconfined_ops = {
2155 .read = smk_read_unconfined,
2156 .write = smk_write_unconfined,
2157 .llseek = default_llseek,
2159 #endif /* CONFIG_SECURITY_SMACK_BRINGUP */
2162 * smk_read_logging - read() for /smack/logging
2163 * @filp: file pointer, not actually used
2164 * @buf: where to put the result
2165 * @cn: maximum to send along
2166 * @ppos: where to start
2168 * Returns number of bytes read or error code, as appropriate
2170 static ssize_t smk_read_logging(struct file *filp, char __user *buf,
2171 size_t count, loff_t *ppos)
2179 sprintf(temp, "%d\n", log_policy);
2180 rc = simple_read_from_buffer(buf, count, ppos, temp, strlen(temp));
2185 * smk_write_logging - write() for /smack/logging
2186 * @file: file pointer, not actually used
2187 * @buf: where to get the data from
2188 * @count: bytes sent
2189 * @ppos: where to start
2191 * Returns number of bytes written or error code, as appropriate
2193 static ssize_t smk_write_logging(struct file *file, const char __user *buf,
2194 size_t count, loff_t *ppos)
2199 if (!smack_privileged(CAP_MAC_ADMIN))
2202 if (count >= sizeof(temp) || count == 0)
2205 if (copy_from_user(temp, buf, count) != 0)
2210 if (sscanf(temp, "%d", &i) != 1)
2220 static const struct file_operations smk_logging_ops = {
2221 .read = smk_read_logging,
2222 .write = smk_write_logging,
2223 .llseek = default_llseek,
2227 * Seq_file read operations for /smack/load-self
2230 static void *load_self_seq_start(struct seq_file *s, loff_t *pos)
2232 struct task_smack *tsp = current_security();
2234 return smk_seq_start(s, pos, &tsp->smk_rules);
2237 static void *load_self_seq_next(struct seq_file *s, void *v, loff_t *pos)
2239 struct task_smack *tsp = current_security();
2241 return smk_seq_next(s, v, pos, &tsp->smk_rules);
2244 static int load_self_seq_show(struct seq_file *s, void *v)
2246 struct list_head *list = v;
2247 struct smack_rule *srp =
2248 list_entry_rcu(list, struct smack_rule, list);
2250 smk_rule_show(s, srp, SMK_LABELLEN);
2255 static const struct seq_operations load_self_seq_ops = {
2256 .start = load_self_seq_start,
2257 .next = load_self_seq_next,
2258 .show = load_self_seq_show,
2259 .stop = smk_seq_stop,
2264 * smk_open_load_self - open() for /smack/load-self2
2265 * @inode: inode structure representing file
2266 * @file: "load" file pointer
2268 * For reading, use load_seq_* seq_file reading operations.
2270 static int smk_open_load_self(struct inode *inode, struct file *file)
2272 return seq_open(file, &load_self_seq_ops);
2276 * smk_write_load_self - write() for /smack/load-self
2277 * @file: file pointer, not actually used
2278 * @buf: where to get the data from
2279 * @count: bytes sent
2280 * @ppos: where to start - must be 0
2283 static ssize_t smk_write_load_self(struct file *file, const char __user *buf,
2284 size_t count, loff_t *ppos)
2286 struct task_smack *tsp = current_security();
2288 return smk_write_rules_list(file, buf, count, ppos, &tsp->smk_rules,
2289 &tsp->smk_rules_lock, SMK_FIXED24_FMT);
2292 static const struct file_operations smk_load_self_ops = {
2293 .open = smk_open_load_self,
2295 .llseek = seq_lseek,
2296 .write = smk_write_load_self,
2297 .release = seq_release,
2301 * smk_user_access - handle access check transaction
2302 * @file: file pointer
2303 * @buf: data from user space
2304 * @count: bytes sent
2305 * @ppos: where to start - must be 0
2307 static ssize_t smk_user_access(struct file *file, const char __user *buf,
2308 size_t count, loff_t *ppos, int format)
2310 struct smack_parsed_rule rule;
2314 data = simple_transaction_get(file, buf, count);
2316 return PTR_ERR(data);
2318 if (format == SMK_FIXED24_FMT) {
2319 if (count < SMK_LOADLEN)
2321 res = smk_parse_rule(data, &rule, 0);
2324 * simple_transaction_get() returns null-terminated data
2326 res = smk_parse_long_rule(data, &rule, 0, 3);
2330 res = smk_access(rule.smk_subject, rule.smk_object,
2331 rule.smk_access1, NULL);
2332 else if (res != -ENOENT)
2336 * smk_access() can return a value > 0 in the "bringup" case.
2338 data[0] = res >= 0 ? '1' : '0';
2341 simple_transaction_set(file, 2);
2343 if (format == SMK_FIXED24_FMT)
2349 * smk_write_access - handle access check transaction
2350 * @file: file pointer
2351 * @buf: data from user space
2352 * @count: bytes sent
2353 * @ppos: where to start - must be 0
2355 static ssize_t smk_write_access(struct file *file, const char __user *buf,
2356 size_t count, loff_t *ppos)
2358 return smk_user_access(file, buf, count, ppos, SMK_FIXED24_FMT);
2361 static const struct file_operations smk_access_ops = {
2362 .write = smk_write_access,
2363 .read = simple_transaction_read,
2364 .release = simple_transaction_release,
2365 .llseek = generic_file_llseek,
2370 * Seq_file read operations for /smack/load2
2373 static int load2_seq_show(struct seq_file *s, void *v)
2375 struct list_head *list = v;
2376 struct smack_master_list *smlp =
2377 list_entry_rcu(list, struct smack_master_list, list);
2379 smk_rule_show(s, smlp->smk_rule, SMK_LONGLABEL);
2384 static const struct seq_operations load2_seq_ops = {
2385 .start = load2_seq_start,
2386 .next = load2_seq_next,
2387 .show = load2_seq_show,
2388 .stop = smk_seq_stop,
2392 * smk_open_load2 - open() for /smack/load2
2393 * @inode: inode structure representing file
2394 * @file: "load2" file pointer
2396 * For reading, use load2_seq_* seq_file reading operations.
2398 static int smk_open_load2(struct inode *inode, struct file *file)
2400 return seq_open(file, &load2_seq_ops);
2404 * smk_write_load2 - write() for /smack/load2
2405 * @file: file pointer, not actually used
2406 * @buf: where to get the data from
2407 * @count: bytes sent
2408 * @ppos: where to start - must be 0
2411 static ssize_t smk_write_load2(struct file *file, const char __user *buf,
2412 size_t count, loff_t *ppos)
2415 * Must have privilege.
2417 if (!smack_privileged(CAP_MAC_ADMIN))
2420 return smk_write_rules_list(file, buf, count, ppos, NULL, NULL,
2424 static const struct file_operations smk_load2_ops = {
2425 .open = smk_open_load2,
2427 .llseek = seq_lseek,
2428 .write = smk_write_load2,
2429 .release = seq_release,
2433 * Seq_file read operations for /smack/load-self2
2436 static void *load_self2_seq_start(struct seq_file *s, loff_t *pos)
2438 struct task_smack *tsp = current_security();
2440 return smk_seq_start(s, pos, &tsp->smk_rules);
2443 static void *load_self2_seq_next(struct seq_file *s, void *v, loff_t *pos)
2445 struct task_smack *tsp = current_security();
2447 return smk_seq_next(s, v, pos, &tsp->smk_rules);
2450 static int load_self2_seq_show(struct seq_file *s, void *v)
2452 struct list_head *list = v;
2453 struct smack_rule *srp =
2454 list_entry_rcu(list, struct smack_rule, list);
2456 smk_rule_show(s, srp, SMK_LONGLABEL);
2461 static const struct seq_operations load_self2_seq_ops = {
2462 .start = load_self2_seq_start,
2463 .next = load_self2_seq_next,
2464 .show = load_self2_seq_show,
2465 .stop = smk_seq_stop,
2469 * smk_open_load_self2 - open() for /smack/load-self2
2470 * @inode: inode structure representing file
2471 * @file: "load" file pointer
2473 * For reading, use load_seq_* seq_file reading operations.
2475 static int smk_open_load_self2(struct inode *inode, struct file *file)
2477 return seq_open(file, &load_self2_seq_ops);
2481 * smk_write_load_self2 - write() for /smack/load-self2
2482 * @file: file pointer, not actually used
2483 * @buf: where to get the data from
2484 * @count: bytes sent
2485 * @ppos: where to start - must be 0
2488 static ssize_t smk_write_load_self2(struct file *file, const char __user *buf,
2489 size_t count, loff_t *ppos)
2491 struct task_smack *tsp = current_security();
2493 return smk_write_rules_list(file, buf, count, ppos, &tsp->smk_rules,
2494 &tsp->smk_rules_lock, SMK_LONG_FMT);
2497 static const struct file_operations smk_load_self2_ops = {
2498 .open = smk_open_load_self2,
2500 .llseek = seq_lseek,
2501 .write = smk_write_load_self2,
2502 .release = seq_release,
2506 * smk_write_access2 - handle access check transaction
2507 * @file: file pointer
2508 * @buf: data from user space
2509 * @count: bytes sent
2510 * @ppos: where to start - must be 0
2512 static ssize_t smk_write_access2(struct file *file, const char __user *buf,
2513 size_t count, loff_t *ppos)
2515 return smk_user_access(file, buf, count, ppos, SMK_LONG_FMT);
2518 static const struct file_operations smk_access2_ops = {
2519 .write = smk_write_access2,
2520 .read = simple_transaction_read,
2521 .release = simple_transaction_release,
2522 .llseek = generic_file_llseek,
2526 * smk_write_revoke_subj - write() for /smack/revoke-subject
2527 * @file: file pointer
2528 * @buf: data from user space
2529 * @count: bytes sent
2530 * @ppos: where to start - must be 0
2532 static ssize_t smk_write_revoke_subj(struct file *file, const char __user *buf,
2533 size_t count, loff_t *ppos)
2537 struct smack_known *skp;
2538 struct smack_rule *sp;
2539 struct list_head *rule_list;
2540 struct mutex *rule_lock;
2546 if (!smack_privileged(CAP_MAC_ADMIN))
2549 if (count == 0 || count > SMK_LONGLABEL)
2552 data = memdup_user(buf, count);
2554 return PTR_ERR(data);
2556 cp = smk_parse_smack(data, count);
2562 skp = smk_find_entry(cp);
2566 rule_list = &skp->smk_rules;
2567 rule_lock = &skp->smk_rules_lock;
2569 mutex_lock(rule_lock);
2571 list_for_each_entry_rcu(sp, rule_list, list)
2574 mutex_unlock(rule_lock);
2584 static const struct file_operations smk_revoke_subj_ops = {
2585 .write = smk_write_revoke_subj,
2586 .read = simple_transaction_read,
2587 .release = simple_transaction_release,
2588 .llseek = generic_file_llseek,
2592 * smk_init_sysfs - initialize /sys/fs/smackfs
2595 static int smk_init_sysfs(void)
2597 return sysfs_create_mount_point(fs_kobj, "smackfs");
2601 * smk_write_change_rule - write() for /smack/change-rule
2602 * @file: file pointer
2603 * @buf: data from user space
2604 * @count: bytes sent
2605 * @ppos: where to start - must be 0
2607 static ssize_t smk_write_change_rule(struct file *file, const char __user *buf,
2608 size_t count, loff_t *ppos)
2611 * Must have privilege.
2613 if (!smack_privileged(CAP_MAC_ADMIN))
2616 return smk_write_rules_list(file, buf, count, ppos, NULL, NULL,
2620 static const struct file_operations smk_change_rule_ops = {
2621 .write = smk_write_change_rule,
2622 .read = simple_transaction_read,
2623 .release = simple_transaction_release,
2624 .llseek = generic_file_llseek,
2628 * smk_read_syslog - read() for smackfs/syslog
2629 * @filp: file pointer, not actually used
2630 * @buf: where to put the result
2631 * @cn: maximum to send along
2632 * @ppos: where to start
2634 * Returns number of bytes read or error code, as appropriate
2636 static ssize_t smk_read_syslog(struct file *filp, char __user *buf,
2637 size_t cn, loff_t *ppos)
2639 struct smack_known *skp;
2640 ssize_t rc = -EINVAL;
2646 if (smack_syslog_label == NULL)
2647 skp = &smack_known_star;
2649 skp = smack_syslog_label;
2651 asize = strlen(skp->smk_known) + 1;
2654 rc = simple_read_from_buffer(buf, cn, ppos, skp->smk_known,
2661 * smk_write_syslog - write() for smackfs/syslog
2662 * @file: file pointer, not actually used
2663 * @buf: where to get the data from
2664 * @count: bytes sent
2665 * @ppos: where to start
2667 * Returns number of bytes written or error code, as appropriate
2669 static ssize_t smk_write_syslog(struct file *file, const char __user *buf,
2670 size_t count, loff_t *ppos)
2673 struct smack_known *skp;
2676 if (!smack_privileged(CAP_MAC_ADMIN))
2679 /* Enough data must be present */
2680 if (count == 0 || count > PAGE_SIZE)
2683 data = memdup_user_nul(buf, count);
2685 return PTR_ERR(data);
2687 skp = smk_import_entry(data, count);
2691 smack_syslog_label = skp;
2697 static const struct file_operations smk_syslog_ops = {
2698 .read = smk_read_syslog,
2699 .write = smk_write_syslog,
2700 .llseek = default_llseek,
2704 * Seq_file read operations for /smack/relabel-self
2707 static void *relabel_self_seq_start(struct seq_file *s, loff_t *pos)
2709 struct task_smack *tsp = current_security();
2711 return smk_seq_start(s, pos, &tsp->smk_relabel);
2714 static void *relabel_self_seq_next(struct seq_file *s, void *v, loff_t *pos)
2716 struct task_smack *tsp = current_security();
2718 return smk_seq_next(s, v, pos, &tsp->smk_relabel);
2721 static int relabel_self_seq_show(struct seq_file *s, void *v)
2723 struct list_head *list = v;
2724 struct smack_known_list_elem *sklep =
2725 list_entry(list, struct smack_known_list_elem, list);
2727 seq_puts(s, sklep->smk_label->smk_known);
2733 static const struct seq_operations relabel_self_seq_ops = {
2734 .start = relabel_self_seq_start,
2735 .next = relabel_self_seq_next,
2736 .show = relabel_self_seq_show,
2737 .stop = smk_seq_stop,
2741 * smk_open_relabel_self - open() for /smack/relabel-self
2742 * @inode: inode structure representing file
2743 * @file: "relabel-self" file pointer
2745 * Connect our relabel_self_seq_* operations with /smack/relabel-self
2748 static int smk_open_relabel_self(struct inode *inode, struct file *file)
2750 return seq_open(file, &relabel_self_seq_ops);
2754 * smk_write_relabel_self - write() for /smack/relabel-self
2755 * @file: file pointer, not actually used
2756 * @buf: where to get the data from
2757 * @count: bytes sent
2758 * @ppos: where to start - must be 0
2761 static ssize_t smk_write_relabel_self(struct file *file, const char __user *buf,
2762 size_t count, loff_t *ppos)
2766 LIST_HEAD(list_tmp);
2769 * Must have privilege.
2771 if (!smack_privileged(CAP_MAC_ADMIN))
2776 * Enough data must be present.
2780 if (count == 0 || count > PAGE_SIZE)
2783 data = memdup_user_nul(buf, count);
2785 return PTR_ERR(data);
2787 rc = smk_parse_label_list(data, &list_tmp);
2790 if (!rc || (rc == -EINVAL && list_empty(&list_tmp))) {
2792 struct task_smack *tsp;
2794 new = prepare_creds();
2799 tsp = new->security;
2800 smk_destroy_label_list(&tsp->smk_relabel);
2801 list_splice(&list_tmp, &tsp->smk_relabel);
2806 smk_destroy_label_list(&list_tmp);
2810 static const struct file_operations smk_relabel_self_ops = {
2811 .open = smk_open_relabel_self,
2813 .llseek = seq_lseek,
2814 .write = smk_write_relabel_self,
2815 .release = seq_release,
2819 * smk_read_ptrace - read() for /smack/ptrace
2820 * @filp: file pointer, not actually used
2821 * @buf: where to put the result
2822 * @count: maximum to send along
2823 * @ppos: where to start
2825 * Returns number of bytes read or error code, as appropriate
2827 static ssize_t smk_read_ptrace(struct file *filp, char __user *buf,
2828 size_t count, loff_t *ppos)
2836 sprintf(temp, "%d\n", smack_ptrace_rule);
2837 rc = simple_read_from_buffer(buf, count, ppos, temp, strlen(temp));
2842 * smk_write_ptrace - write() for /smack/ptrace
2843 * @file: file pointer
2844 * @buf: data from user space
2845 * @count: bytes sent
2846 * @ppos: where to start - must be 0
2848 static ssize_t smk_write_ptrace(struct file *file, const char __user *buf,
2849 size_t count, loff_t *ppos)
2854 if (!smack_privileged(CAP_MAC_ADMIN))
2857 if (*ppos != 0 || count >= sizeof(temp) || count == 0)
2860 if (copy_from_user(temp, buf, count) != 0)
2865 if (sscanf(temp, "%d", &i) != 1)
2867 if (i < SMACK_PTRACE_DEFAULT || i > SMACK_PTRACE_MAX)
2869 smack_ptrace_rule = i;
2874 static const struct file_operations smk_ptrace_ops = {
2875 .write = smk_write_ptrace,
2876 .read = smk_read_ptrace,
2877 .llseek = default_llseek,
2881 * smk_fill_super - fill the smackfs superblock
2882 * @sb: the empty superblock
2886 * Fill in the well known entries for the smack filesystem
2888 * Returns 0 on success, an error code on failure
2890 static int smk_fill_super(struct super_block *sb, void *data, int silent)
2893 struct inode *root_inode;
2895 static struct tree_descr smack_files[] = {
2897 "load", &smk_load_ops, S_IRUGO|S_IWUSR},
2899 "cipso", &smk_cipso_ops, S_IRUGO|S_IWUSR},
2901 "doi", &smk_doi_ops, S_IRUGO|S_IWUSR},
2903 "direct", &smk_direct_ops, S_IRUGO|S_IWUSR},
2905 "ambient", &smk_ambient_ops, S_IRUGO|S_IWUSR},
2907 "netlabel", &smk_net4addr_ops, S_IRUGO|S_IWUSR},
2909 "onlycap", &smk_onlycap_ops, S_IRUGO|S_IWUSR},
2911 "logging", &smk_logging_ops, S_IRUGO|S_IWUSR},
2913 "load-self", &smk_load_self_ops, S_IRUGO|S_IWUGO},
2915 "access", &smk_access_ops, S_IRUGO|S_IWUGO},
2917 "mapped", &smk_mapped_ops, S_IRUGO|S_IWUSR},
2919 "load2", &smk_load2_ops, S_IRUGO|S_IWUSR},
2920 [SMK_LOAD_SELF2] = {
2921 "load-self2", &smk_load_self2_ops, S_IRUGO|S_IWUGO},
2923 "access2", &smk_access2_ops, S_IRUGO|S_IWUGO},
2925 "cipso2", &smk_cipso2_ops, S_IRUGO|S_IWUSR},
2926 [SMK_REVOKE_SUBJ] = {
2927 "revoke-subject", &smk_revoke_subj_ops,
2929 [SMK_CHANGE_RULE] = {
2930 "change-rule", &smk_change_rule_ops, S_IRUGO|S_IWUSR},
2932 "syslog", &smk_syslog_ops, S_IRUGO|S_IWUSR},
2934 "ptrace", &smk_ptrace_ops, S_IRUGO|S_IWUSR},
2935 #ifdef CONFIG_SECURITY_SMACK_BRINGUP
2936 [SMK_UNCONFINED] = {
2937 "unconfined", &smk_unconfined_ops, S_IRUGO|S_IWUSR},
2939 #if IS_ENABLED(CONFIG_IPV6)
2941 "ipv6host", &smk_net6addr_ops, S_IRUGO|S_IWUSR},
2942 #endif /* CONFIG_IPV6 */
2943 [SMK_RELABEL_SELF] = {
2944 "relabel-self", &smk_relabel_self_ops,
2950 rc = simple_fill_super(sb, SMACK_MAGIC, smack_files);
2952 printk(KERN_ERR "%s failed %d while creating inodes\n",
2957 root_inode = d_inode(sb->s_root);
2963 * smk_mount - get the smackfs superblock
2964 * @fs_type: passed along without comment
2965 * @flags: passed along without comment
2966 * @dev_name: passed along without comment
2967 * @data: passed along without comment
2969 * Just passes everything along.
2971 * Returns what the lower level code does.
2973 static struct dentry *smk_mount(struct file_system_type *fs_type,
2974 int flags, const char *dev_name, void *data)
2976 return mount_single(fs_type, flags, data, smk_fill_super);
2979 static struct file_system_type smk_fs_type = {
2982 .kill_sb = kill_litter_super,
2985 static struct vfsmount *smackfs_mount;
2987 static int __init smk_preset_netlabel(struct smack_known *skp)
2989 skp->smk_netlabel.domain = skp->smk_known;
2990 skp->smk_netlabel.flags =
2991 NETLBL_SECATTR_DOMAIN | NETLBL_SECATTR_MLS_LVL;
2992 return smk_netlbl_mls(smack_cipso_direct, skp->smk_known,
2993 &skp->smk_netlabel, strlen(skp->smk_known));
2997 * init_smk_fs - get the smackfs superblock
2999 * register the smackfs
3001 * Do not register smackfs if Smack wasn't enabled
3002 * on boot. We can not put this method normally under the
3003 * smack_init() code path since the security subsystem get
3004 * initialized before the vfs caches.
3006 * Returns true if we were not chosen on boot or if
3007 * we were chosen and filesystem registration succeeded.
3009 static int __init init_smk_fs(void)
3014 if (smack_enabled == 0)
3017 err = smk_init_sysfs();
3019 printk(KERN_ERR "smackfs: sysfs mountpoint problem.\n");
3021 err = register_filesystem(&smk_fs_type);
3023 smackfs_mount = kern_mount(&smk_fs_type);
3024 if (IS_ERR(smackfs_mount)) {
3025 printk(KERN_ERR "smackfs: could not mount!\n");
3026 err = PTR_ERR(smackfs_mount);
3027 smackfs_mount = NULL;
3032 smk_unlbl_ambient(NULL);
3034 rc = smk_preset_netlabel(&smack_known_floor);
3035 if (err == 0 && rc < 0)
3037 rc = smk_preset_netlabel(&smack_known_hat);
3038 if (err == 0 && rc < 0)
3040 rc = smk_preset_netlabel(&smack_known_huh);
3041 if (err == 0 && rc < 0)
3043 rc = smk_preset_netlabel(&smack_known_invalid);
3044 if (err == 0 && rc < 0)
3046 rc = smk_preset_netlabel(&smack_known_star);
3047 if (err == 0 && rc < 0)
3049 rc = smk_preset_netlabel(&smack_known_web);
3050 if (err == 0 && rc < 0)
3056 __initcall(init_smk_fs);