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 | __GFP_NOFAIL);
725 doip->map.std = NULL;
726 doip->doi = smk_cipso_doi_value;
727 doip->type = CIPSO_V4_MAP_PASS;
728 doip->tags[0] = CIPSO_V4_TAG_RBITMAP;
729 for (rc = 1; rc < CIPSO_V4_TAG_MAXCNT; rc++)
730 doip->tags[rc] = CIPSO_V4_TAG_INVALID;
732 rc = netlbl_cfg_cipsov4_add(doip, &nai);
734 printk(KERN_WARNING "%s:%d cipso add rc = %d\n",
735 __func__, __LINE__, rc);
739 rc = netlbl_cfg_cipsov4_map_add(doip->doi, NULL, NULL, NULL, &nai);
741 printk(KERN_WARNING "%s:%d map add rc = %d\n",
742 __func__, __LINE__, rc);
743 netlbl_cfg_cipsov4_del(doip->doi, &nai);
749 * smk_unlbl_ambient - initialize the unlabeled domain
750 * @oldambient: previous domain string
752 static void smk_unlbl_ambient(char *oldambient)
755 struct netlbl_audit nai;
757 smk_netlabel_audit_set(&nai);
759 if (oldambient != NULL) {
760 rc = netlbl_cfg_map_del(oldambient, PF_INET, NULL, NULL, &nai);
762 printk(KERN_WARNING "%s:%d remove rc = %d\n",
763 __func__, __LINE__, rc);
765 if (smack_net_ambient == NULL)
766 smack_net_ambient = &smack_known_floor;
768 rc = netlbl_cfg_unlbl_map_add(smack_net_ambient->smk_known, PF_INET,
771 printk(KERN_WARNING "%s:%d add rc = %d\n",
772 __func__, __LINE__, rc);
776 * Seq_file read operations for /smack/cipso
779 static void *cipso_seq_start(struct seq_file *s, loff_t *pos)
781 return smk_seq_start(s, pos, &smack_known_list);
784 static void *cipso_seq_next(struct seq_file *s, void *v, loff_t *pos)
786 return smk_seq_next(s, v, pos, &smack_known_list);
790 * Print cipso labels in format:
791 * label level[/cat[,cat]]
793 static int cipso_seq_show(struct seq_file *s, void *v)
795 struct list_head *list = v;
796 struct smack_known *skp =
797 list_entry_rcu(list, struct smack_known, list);
798 struct netlbl_lsm_catmap *cmp = skp->smk_netlabel.attr.mls.cat;
803 * Don't show a label that could not have been set using
804 * /smack/cipso. This is in support of the notion that
805 * anything read from /smack/cipso ought to be writeable
808 * /smack/cipso2 should be used instead.
810 if (strlen(skp->smk_known) >= SMK_LABELLEN)
813 seq_printf(s, "%s %3d", skp->smk_known, skp->smk_netlabel.attr.mls.lvl);
815 for (i = netlbl_catmap_walk(cmp, 0); i >= 0;
816 i = netlbl_catmap_walk(cmp, i + 1)) {
817 seq_printf(s, "%c%d", sep, i);
826 static const struct seq_operations cipso_seq_ops = {
827 .start = cipso_seq_start,
828 .next = cipso_seq_next,
829 .show = cipso_seq_show,
830 .stop = smk_seq_stop,
834 * smk_open_cipso - open() for /smack/cipso
835 * @inode: inode structure representing file
836 * @file: "cipso" file pointer
838 * Connect our cipso_seq_* operations with /smack/cipso
841 static int smk_open_cipso(struct inode *inode, struct file *file)
843 return seq_open(file, &cipso_seq_ops);
847 * smk_set_cipso - do the work for write() for cipso and cipso2
848 * @file: file pointer, not actually used
849 * @buf: where to get the data from
851 * @ppos: where to start
852 * @format: /smack/cipso or /smack/cipso2
854 * Accepts only one cipso rule per write call.
855 * Returns number of bytes written or error code, as appropriate
857 static ssize_t smk_set_cipso(struct file *file, const char __user *buf,
858 size_t count, loff_t *ppos, int format)
860 struct netlbl_lsm_catmap *old_cat;
861 struct smack_known *skp;
862 struct netlbl_lsm_secattr ncats;
863 char mapcatset[SMK_CIPSOLEN];
867 ssize_t rc = -EINVAL;
874 * Must have privilege.
876 * Enough data must be present.
878 if (!smack_privileged(CAP_MAC_ADMIN))
882 if (format == SMK_FIXED24_FMT &&
883 (count < SMK_CIPSOMIN || count > SMK_CIPSOMAX))
886 data = kzalloc(count + 1, GFP_KERNEL);
890 if (copy_from_user(data, buf, count) != 0) {
898 * Only allow one writer at a time. Writes should be
899 * quite rare and small in any case.
901 mutex_lock(&smack_cipso_lock);
903 skp = smk_import_entry(rule, 0);
909 if (format == SMK_FIXED24_FMT)
910 rule += SMK_LABELLEN;
912 rule += strlen(skp->smk_known) + 1;
914 if (rule > data + count) {
919 ret = sscanf(rule, "%d", &maplevel);
920 if (ret != 1 || maplevel < 0 || maplevel > SMACK_CIPSO_MAXLEVEL)
923 rule += SMK_DIGITLEN;
924 if (rule > data + count) {
929 ret = sscanf(rule, "%d", &catlen);
930 if (ret != 1 || catlen > SMACK_CIPSO_MAXCATNUM)
933 if (format == SMK_FIXED24_FMT &&
934 count != (SMK_CIPSOMIN + catlen * SMK_DIGITLEN))
937 memset(mapcatset, 0, sizeof(mapcatset));
939 for (i = 0; i < catlen; i++) {
940 rule += SMK_DIGITLEN;
941 if (rule > data + count) {
945 ret = sscanf(rule, "%u", &cat);
946 if (ret != 1 || cat > SMACK_CIPSO_MAXCATNUM)
949 smack_catset_bit(cat, mapcatset);
952 rc = smk_netlbl_mls(maplevel, mapcatset, &ncats, SMK_CIPSOLEN);
954 old_cat = skp->smk_netlabel.attr.mls.cat;
955 skp->smk_netlabel.attr.mls.cat = ncats.attr.mls.cat;
956 skp->smk_netlabel.attr.mls.lvl = ncats.attr.mls.lvl;
958 netlbl_catmap_free(old_cat);
963 mutex_unlock(&smack_cipso_lock);
970 * smk_write_cipso - write() for /smack/cipso
971 * @file: file pointer, not actually used
972 * @buf: where to get the data from
974 * @ppos: where to start
976 * Accepts only one cipso rule per write call.
977 * Returns number of bytes written or error code, as appropriate
979 static ssize_t smk_write_cipso(struct file *file, const char __user *buf,
980 size_t count, loff_t *ppos)
982 return smk_set_cipso(file, buf, count, ppos, SMK_FIXED24_FMT);
985 static const struct file_operations smk_cipso_ops = {
986 .open = smk_open_cipso,
989 .write = smk_write_cipso,
990 .release = seq_release,
994 * Seq_file read operations for /smack/cipso2
998 * Print cipso labels in format:
999 * label level[/cat[,cat]]
1001 static int cipso2_seq_show(struct seq_file *s, void *v)
1003 struct list_head *list = v;
1004 struct smack_known *skp =
1005 list_entry_rcu(list, struct smack_known, list);
1006 struct netlbl_lsm_catmap *cmp = skp->smk_netlabel.attr.mls.cat;
1010 seq_printf(s, "%s %3d", skp->smk_known, skp->smk_netlabel.attr.mls.lvl);
1012 for (i = netlbl_catmap_walk(cmp, 0); i >= 0;
1013 i = netlbl_catmap_walk(cmp, i + 1)) {
1014 seq_printf(s, "%c%d", sep, i);
1023 static const struct seq_operations cipso2_seq_ops = {
1024 .start = cipso_seq_start,
1025 .next = cipso_seq_next,
1026 .show = cipso2_seq_show,
1027 .stop = smk_seq_stop,
1031 * smk_open_cipso2 - open() for /smack/cipso2
1032 * @inode: inode structure representing file
1033 * @file: "cipso2" file pointer
1035 * Connect our cipso_seq_* operations with /smack/cipso2
1038 static int smk_open_cipso2(struct inode *inode, struct file *file)
1040 return seq_open(file, &cipso2_seq_ops);
1044 * smk_write_cipso2 - write() for /smack/cipso2
1045 * @file: file pointer, not actually used
1046 * @buf: where to get the data from
1047 * @count: bytes sent
1048 * @ppos: where to start
1050 * Accepts only one cipso rule per write call.
1051 * Returns number of bytes written or error code, as appropriate
1053 static ssize_t smk_write_cipso2(struct file *file, const char __user *buf,
1054 size_t count, loff_t *ppos)
1056 return smk_set_cipso(file, buf, count, ppos, SMK_LONG_FMT);
1059 static const struct file_operations smk_cipso2_ops = {
1060 .open = smk_open_cipso2,
1062 .llseek = seq_lseek,
1063 .write = smk_write_cipso2,
1064 .release = seq_release,
1068 * Seq_file read operations for /smack/netlabel
1071 static void *net4addr_seq_start(struct seq_file *s, loff_t *pos)
1073 return smk_seq_start(s, pos, &smk_net4addr_list);
1076 static void *net4addr_seq_next(struct seq_file *s, void *v, loff_t *pos)
1078 return smk_seq_next(s, v, pos, &smk_net4addr_list);
1082 * Print host/label pairs
1084 static int net4addr_seq_show(struct seq_file *s, void *v)
1086 struct list_head *list = v;
1087 struct smk_net4addr *skp =
1088 list_entry_rcu(list, struct smk_net4addr, list);
1089 char *kp = SMACK_CIPSO_OPTION;
1091 if (skp->smk_label != NULL)
1092 kp = skp->smk_label->smk_known;
1093 seq_printf(s, "%pI4/%d %s\n", &skp->smk_host.s_addr,
1094 skp->smk_masks, kp);
1099 static const struct seq_operations net4addr_seq_ops = {
1100 .start = net4addr_seq_start,
1101 .next = net4addr_seq_next,
1102 .show = net4addr_seq_show,
1103 .stop = smk_seq_stop,
1107 * smk_open_net4addr - open() for /smack/netlabel
1108 * @inode: inode structure representing file
1109 * @file: "netlabel" file pointer
1111 * Connect our net4addr_seq_* operations with /smack/netlabel
1114 static int smk_open_net4addr(struct inode *inode, struct file *file)
1116 return seq_open(file, &net4addr_seq_ops);
1120 * smk_net4addr_insert
1121 * @new : netlabel to insert
1123 * This helper insert netlabel in the smack_net4addrs list
1124 * sorted by netmask length (longest to smallest)
1125 * locked by &smk_net4addr_lock in smk_write_net4addr
1128 static void smk_net4addr_insert(struct smk_net4addr *new)
1130 struct smk_net4addr *m;
1131 struct smk_net4addr *m_next;
1133 if (list_empty(&smk_net4addr_list)) {
1134 list_add_rcu(&new->list, &smk_net4addr_list);
1138 m = list_entry_rcu(smk_net4addr_list.next,
1139 struct smk_net4addr, list);
1141 /* the comparison '>' is a bit hacky, but works */
1142 if (new->smk_masks > m->smk_masks) {
1143 list_add_rcu(&new->list, &smk_net4addr_list);
1147 list_for_each_entry_rcu(m, &smk_net4addr_list, list) {
1148 if (list_is_last(&m->list, &smk_net4addr_list)) {
1149 list_add_rcu(&new->list, &m->list);
1152 m_next = list_entry_rcu(m->list.next,
1153 struct smk_net4addr, list);
1154 if (new->smk_masks > m_next->smk_masks) {
1155 list_add_rcu(&new->list, &m->list);
1163 * smk_write_net4addr - write() for /smack/netlabel
1164 * @file: file pointer, not actually used
1165 * @buf: where to get the data from
1166 * @count: bytes sent
1167 * @ppos: where to start
1169 * Accepts only one net4addr per write call.
1170 * Returns number of bytes written or error code, as appropriate
1172 static ssize_t smk_write_net4addr(struct file *file, const char __user *buf,
1173 size_t count, loff_t *ppos)
1175 struct smk_net4addr *snp;
1176 struct sockaddr_in newname;
1178 struct smack_known *skp = NULL;
1180 char *host = (char *)&newname.sin_addr.s_addr;
1182 struct netlbl_audit audit_info;
1183 struct in_addr mask;
1187 u32 mask_bits = (1<<31);
1192 * Must have privilege.
1193 * No partial writes.
1194 * Enough data must be present.
1195 * "<addr/mask, as a.b.c.d/e><space><label>"
1196 * "<addr, as a.b.c.d><space><label>"
1198 if (!smack_privileged(CAP_MAC_ADMIN))
1202 if (count < SMK_NETLBLADDRMIN)
1205 data = kzalloc(count + 1, GFP_KERNEL);
1209 if (copy_from_user(data, buf, count) != 0) {
1214 smack = kzalloc(count + 1, GFP_KERNEL);
1215 if (smack == NULL) {
1222 rc = sscanf(data, "%hhd.%hhd.%hhd.%hhd/%u %s",
1223 &host[0], &host[1], &host[2], &host[3], &masks, smack);
1225 rc = sscanf(data, "%hhd.%hhd.%hhd.%hhd %s",
1226 &host[0], &host[1], &host[2], &host[3], smack);
1234 if (masks > BEBITS) {
1240 * If smack begins with '-', it is an option, don't import it
1242 if (smack[0] != '-') {
1243 skp = smk_import_entry(smack, 0);
1250 * Only the -CIPSO option is supported for IPv4
1252 if (strcmp(smack, SMACK_CIPSO_OPTION) != 0) {
1258 for (m = masks, temp_mask = 0; m > 0; m--) {
1259 temp_mask |= mask_bits;
1262 mask.s_addr = cpu_to_be32(temp_mask);
1264 newname.sin_addr.s_addr &= mask.s_addr;
1266 * Only allow one writer at a time. Writes should be
1267 * quite rare and small in any case.
1269 mutex_lock(&smk_net4addr_lock);
1271 nsa = newname.sin_addr.s_addr;
1272 /* try to find if the prefix is already in the list */
1274 list_for_each_entry_rcu(snp, &smk_net4addr_list, list) {
1275 if (snp->smk_host.s_addr == nsa && snp->smk_masks == masks) {
1280 smk_netlabel_audit_set(&audit_info);
1283 snp = kzalloc(sizeof(*snp), GFP_KERNEL);
1288 snp->smk_host.s_addr = newname.sin_addr.s_addr;
1289 snp->smk_mask.s_addr = mask.s_addr;
1290 snp->smk_label = skp;
1291 snp->smk_masks = masks;
1292 smk_net4addr_insert(snp);
1296 * Delete the unlabeled entry, only if the previous label
1297 * wasn't the special CIPSO option
1299 if (snp->smk_label != NULL)
1300 rc = netlbl_cfg_unlbl_static_del(&init_net, NULL,
1301 &snp->smk_host, &snp->smk_mask,
1302 PF_INET, &audit_info);
1305 snp->smk_label = skp;
1309 * Now tell netlabel about the single label nature of
1310 * this host so that incoming packets get labeled.
1311 * but only if we didn't get the special CIPSO option
1313 if (rc == 0 && skp != NULL)
1314 rc = netlbl_cfg_unlbl_static_add(&init_net, NULL,
1315 &snp->smk_host, &snp->smk_mask, PF_INET,
1316 snp->smk_label->smk_secid, &audit_info);
1321 mutex_unlock(&smk_net4addr_lock);
1331 static const struct file_operations smk_net4addr_ops = {
1332 .open = smk_open_net4addr,
1334 .llseek = seq_lseek,
1335 .write = smk_write_net4addr,
1336 .release = seq_release,
1339 #if IS_ENABLED(CONFIG_IPV6)
1341 * Seq_file read operations for /smack/netlabel6
1344 static void *net6addr_seq_start(struct seq_file *s, loff_t *pos)
1346 return smk_seq_start(s, pos, &smk_net6addr_list);
1349 static void *net6addr_seq_next(struct seq_file *s, void *v, loff_t *pos)
1351 return smk_seq_next(s, v, pos, &smk_net6addr_list);
1355 * Print host/label pairs
1357 static int net6addr_seq_show(struct seq_file *s, void *v)
1359 struct list_head *list = v;
1360 struct smk_net6addr *skp =
1361 list_entry(list, struct smk_net6addr, list);
1363 if (skp->smk_label != NULL)
1364 seq_printf(s, "%pI6/%d %s\n", &skp->smk_host, skp->smk_masks,
1365 skp->smk_label->smk_known);
1370 static const struct seq_operations net6addr_seq_ops = {
1371 .start = net6addr_seq_start,
1372 .next = net6addr_seq_next,
1373 .show = net6addr_seq_show,
1374 .stop = smk_seq_stop,
1378 * smk_open_net6addr - open() for /smack/netlabel
1379 * @inode: inode structure representing file
1380 * @file: "netlabel" file pointer
1382 * Connect our net6addr_seq_* operations with /smack/netlabel
1385 static int smk_open_net6addr(struct inode *inode, struct file *file)
1387 return seq_open(file, &net6addr_seq_ops);
1391 * smk_net6addr_insert
1392 * @new : entry to insert
1394 * This inserts an entry in the smack_net6addrs list
1395 * sorted by netmask length (longest to smallest)
1396 * locked by &smk_net6addr_lock in smk_write_net6addr
1399 static void smk_net6addr_insert(struct smk_net6addr *new)
1401 struct smk_net6addr *m_next;
1402 struct smk_net6addr *m;
1404 if (list_empty(&smk_net6addr_list)) {
1405 list_add_rcu(&new->list, &smk_net6addr_list);
1409 m = list_entry_rcu(smk_net6addr_list.next,
1410 struct smk_net6addr, list);
1412 if (new->smk_masks > m->smk_masks) {
1413 list_add_rcu(&new->list, &smk_net6addr_list);
1417 list_for_each_entry_rcu(m, &smk_net6addr_list, list) {
1418 if (list_is_last(&m->list, &smk_net6addr_list)) {
1419 list_add_rcu(&new->list, &m->list);
1422 m_next = list_entry_rcu(m->list.next,
1423 struct smk_net6addr, list);
1424 if (new->smk_masks > m_next->smk_masks) {
1425 list_add_rcu(&new->list, &m->list);
1433 * smk_write_net6addr - write() for /smack/netlabel
1434 * @file: file pointer, not actually used
1435 * @buf: where to get the data from
1436 * @count: bytes sent
1437 * @ppos: where to start
1439 * Accepts only one net6addr per write call.
1440 * Returns number of bytes written or error code, as appropriate
1442 static ssize_t smk_write_net6addr(struct file *file, const char __user *buf,
1443 size_t count, loff_t *ppos)
1445 struct smk_net6addr *snp;
1446 struct in6_addr newname;
1447 struct in6_addr fullmask;
1448 struct smack_known *skp = NULL;
1454 unsigned int scanned[8];
1456 unsigned int mask = 128;
1459 * Must have privilege.
1460 * No partial writes.
1461 * Enough data must be present.
1462 * "<addr/mask, as a:b:c:d:e:f:g:h/e><space><label>"
1463 * "<addr, as a:b:c:d:e:f:g:h><space><label>"
1465 if (!smack_privileged(CAP_MAC_ADMIN))
1469 if (count < SMK_NETLBLADDRMIN)
1472 data = kzalloc(count + 1, GFP_KERNEL);
1476 if (copy_from_user(data, buf, count) != 0) {
1481 smack = kzalloc(count + 1, GFP_KERNEL);
1482 if (smack == NULL) {
1489 i = sscanf(data, "%x:%x:%x:%x:%x:%x:%x:%x/%u %s",
1490 &scanned[0], &scanned[1], &scanned[2], &scanned[3],
1491 &scanned[4], &scanned[5], &scanned[6], &scanned[7],
1494 i = sscanf(data, "%x:%x:%x:%x:%x:%x:%x:%x %s",
1495 &scanned[0], &scanned[1], &scanned[2],
1496 &scanned[3], &scanned[4], &scanned[5],
1497 &scanned[6], &scanned[7], smack);
1507 for (i = 0; i < 8; i++) {
1508 if (scanned[i] > 0xffff) {
1512 newname.s6_addr16[i] = htons(scanned[i]);
1516 * If smack begins with '-', it is an option, don't import it
1518 if (smack[0] != '-') {
1519 skp = smk_import_entry(smack, 0);
1526 * Only -DELETE is supported for IPv6
1528 if (strcmp(smack, SMACK_DELETE_OPTION) != 0) {
1534 for (i = 0, m = mask; i < 8; i++) {
1536 fullmask.s6_addr16[i] = 0xffff;
1539 fullmask.s6_addr16[i] = (1 << m) - 1;
1542 fullmask.s6_addr16[i] = 0;
1543 newname.s6_addr16[i] &= fullmask.s6_addr16[i];
1547 * Only allow one writer at a time. Writes should be
1548 * quite rare and small in any case.
1550 mutex_lock(&smk_net6addr_lock);
1552 * Try to find the prefix in the list
1554 list_for_each_entry_rcu(snp, &smk_net6addr_list, list) {
1555 if (mask != snp->smk_masks)
1557 for (found = 1, i = 0; i < 8; i++) {
1558 if (newname.s6_addr16[i] !=
1559 snp->smk_host.s6_addr16[i]) {
1568 snp = kzalloc(sizeof(*snp), GFP_KERNEL);
1572 snp->smk_host = newname;
1573 snp->smk_mask = fullmask;
1574 snp->smk_masks = mask;
1575 snp->smk_label = skp;
1576 smk_net6addr_insert(snp);
1579 snp->smk_label = skp;
1585 mutex_unlock(&smk_net6addr_lock);
1595 static const struct file_operations smk_net6addr_ops = {
1596 .open = smk_open_net6addr,
1598 .llseek = seq_lseek,
1599 .write = smk_write_net6addr,
1600 .release = seq_release,
1602 #endif /* CONFIG_IPV6 */
1605 * smk_read_doi - read() for /smack/doi
1606 * @filp: file pointer, not actually used
1607 * @buf: where to put the result
1608 * @count: maximum to send along
1609 * @ppos: where to start
1611 * Returns number of bytes read or error code, as appropriate
1613 static ssize_t smk_read_doi(struct file *filp, char __user *buf,
1614 size_t count, loff_t *ppos)
1622 sprintf(temp, "%d", smk_cipso_doi_value);
1623 rc = simple_read_from_buffer(buf, count, ppos, temp, strlen(temp));
1629 * smk_write_doi - write() for /smack/doi
1630 * @file: file pointer, not actually used
1631 * @buf: where to get the data from
1632 * @count: bytes sent
1633 * @ppos: where to start
1635 * Returns number of bytes written or error code, as appropriate
1637 static ssize_t smk_write_doi(struct file *file, const char __user *buf,
1638 size_t count, loff_t *ppos)
1643 if (!smack_privileged(CAP_MAC_ADMIN))
1646 if (count >= sizeof(temp) || count == 0)
1649 if (copy_from_user(temp, buf, count) != 0)
1654 if (sscanf(temp, "%d", &i) != 1)
1657 smk_cipso_doi_value = i;
1664 static const struct file_operations smk_doi_ops = {
1665 .read = smk_read_doi,
1666 .write = smk_write_doi,
1667 .llseek = default_llseek,
1671 * smk_read_direct - read() for /smack/direct
1672 * @filp: file pointer, not actually used
1673 * @buf: where to put the result
1674 * @count: maximum to send along
1675 * @ppos: where to start
1677 * Returns number of bytes read or error code, as appropriate
1679 static ssize_t smk_read_direct(struct file *filp, char __user *buf,
1680 size_t count, loff_t *ppos)
1688 sprintf(temp, "%d", smack_cipso_direct);
1689 rc = simple_read_from_buffer(buf, count, ppos, temp, strlen(temp));
1695 * smk_write_direct - write() for /smack/direct
1696 * @file: file pointer, not actually used
1697 * @buf: where to get the data from
1698 * @count: bytes sent
1699 * @ppos: where to start
1701 * Returns number of bytes written or error code, as appropriate
1703 static ssize_t smk_write_direct(struct file *file, const char __user *buf,
1704 size_t count, loff_t *ppos)
1706 struct smack_known *skp;
1710 if (!smack_privileged(CAP_MAC_ADMIN))
1713 if (count >= sizeof(temp) || count == 0)
1716 if (copy_from_user(temp, buf, count) != 0)
1721 if (sscanf(temp, "%d", &i) != 1)
1725 * Don't do anything if the value hasn't actually changed.
1726 * If it is changing reset the level on entries that were
1727 * set up to be direct when they were created.
1729 if (smack_cipso_direct != i) {
1730 mutex_lock(&smack_known_lock);
1731 list_for_each_entry_rcu(skp, &smack_known_list, list)
1732 if (skp->smk_netlabel.attr.mls.lvl ==
1734 skp->smk_netlabel.attr.mls.lvl = i;
1735 smack_cipso_direct = i;
1736 mutex_unlock(&smack_known_lock);
1742 static const struct file_operations smk_direct_ops = {
1743 .read = smk_read_direct,
1744 .write = smk_write_direct,
1745 .llseek = default_llseek,
1749 * smk_read_mapped - read() for /smack/mapped
1750 * @filp: file pointer, not actually used
1751 * @buf: where to put the result
1752 * @count: maximum to send along
1753 * @ppos: where to start
1755 * Returns number of bytes read or error code, as appropriate
1757 static ssize_t smk_read_mapped(struct file *filp, char __user *buf,
1758 size_t count, loff_t *ppos)
1766 sprintf(temp, "%d", smack_cipso_mapped);
1767 rc = simple_read_from_buffer(buf, count, ppos, temp, strlen(temp));
1773 * smk_write_mapped - write() for /smack/mapped
1774 * @file: file pointer, not actually used
1775 * @buf: where to get the data from
1776 * @count: bytes sent
1777 * @ppos: where to start
1779 * Returns number of bytes written or error code, as appropriate
1781 static ssize_t smk_write_mapped(struct file *file, const char __user *buf,
1782 size_t count, loff_t *ppos)
1784 struct smack_known *skp;
1788 if (!smack_privileged(CAP_MAC_ADMIN))
1791 if (count >= sizeof(temp) || count == 0)
1794 if (copy_from_user(temp, buf, count) != 0)
1799 if (sscanf(temp, "%d", &i) != 1)
1803 * Don't do anything if the value hasn't actually changed.
1804 * If it is changing reset the level on entries that were
1805 * set up to be mapped when they were created.
1807 if (smack_cipso_mapped != i) {
1808 mutex_lock(&smack_known_lock);
1809 list_for_each_entry_rcu(skp, &smack_known_list, list)
1810 if (skp->smk_netlabel.attr.mls.lvl ==
1812 skp->smk_netlabel.attr.mls.lvl = i;
1813 smack_cipso_mapped = i;
1814 mutex_unlock(&smack_known_lock);
1820 static const struct file_operations smk_mapped_ops = {
1821 .read = smk_read_mapped,
1822 .write = smk_write_mapped,
1823 .llseek = default_llseek,
1827 * smk_read_ambient - read() for /smack/ambient
1828 * @filp: file pointer, not actually used
1829 * @buf: where to put the result
1830 * @cn: maximum to send along
1831 * @ppos: where to start
1833 * Returns number of bytes read or error code, as appropriate
1835 static ssize_t smk_read_ambient(struct file *filp, char __user *buf,
1836 size_t cn, loff_t *ppos)
1844 * Being careful to avoid a problem in the case where
1845 * smack_net_ambient gets changed in midstream.
1847 mutex_lock(&smack_ambient_lock);
1849 asize = strlen(smack_net_ambient->smk_known) + 1;
1852 rc = simple_read_from_buffer(buf, cn, ppos,
1853 smack_net_ambient->smk_known,
1858 mutex_unlock(&smack_ambient_lock);
1864 * smk_write_ambient - write() for /smack/ambient
1865 * @file: file pointer, not actually used
1866 * @buf: where to get the data from
1867 * @count: bytes sent
1868 * @ppos: where to start
1870 * Returns number of bytes written or error code, as appropriate
1872 static ssize_t smk_write_ambient(struct file *file, const char __user *buf,
1873 size_t count, loff_t *ppos)
1875 struct smack_known *skp;
1880 if (!smack_privileged(CAP_MAC_ADMIN))
1883 data = kzalloc(count + 1, GFP_KERNEL);
1887 if (copy_from_user(data, buf, count) != 0) {
1892 skp = smk_import_entry(data, count);
1898 mutex_lock(&smack_ambient_lock);
1900 oldambient = smack_net_ambient->smk_known;
1901 smack_net_ambient = skp;
1902 smk_unlbl_ambient(oldambient);
1904 mutex_unlock(&smack_ambient_lock);
1911 static const struct file_operations smk_ambient_ops = {
1912 .read = smk_read_ambient,
1913 .write = smk_write_ambient,
1914 .llseek = default_llseek,
1918 * Seq_file operations for /smack/onlycap
1920 static void *onlycap_seq_start(struct seq_file *s, loff_t *pos)
1922 return smk_seq_start(s, pos, &smack_onlycap_list);
1925 static void *onlycap_seq_next(struct seq_file *s, void *v, loff_t *pos)
1927 return smk_seq_next(s, v, pos, &smack_onlycap_list);
1930 static int onlycap_seq_show(struct seq_file *s, void *v)
1932 struct list_head *list = v;
1933 struct smack_known_list_elem *sklep =
1934 list_entry_rcu(list, struct smack_known_list_elem, list);
1936 seq_puts(s, sklep->smk_label->smk_known);
1942 static const struct seq_operations onlycap_seq_ops = {
1943 .start = onlycap_seq_start,
1944 .next = onlycap_seq_next,
1945 .show = onlycap_seq_show,
1946 .stop = smk_seq_stop,
1949 static int smk_open_onlycap(struct inode *inode, struct file *file)
1951 return seq_open(file, &onlycap_seq_ops);
1955 * smk_list_swap_rcu - swap public list with a private one in RCU-safe way
1956 * The caller must hold appropriate mutex to prevent concurrent modifications
1957 * to the public list.
1958 * Private list is assumed to be not accessible to other threads yet.
1960 * @public: public list
1961 * @private: private list
1963 static void smk_list_swap_rcu(struct list_head *public,
1964 struct list_head *private)
1966 struct list_head *first, *last;
1968 if (list_empty(public)) {
1969 list_splice_init_rcu(private, public, synchronize_rcu);
1971 /* Remember public list before replacing it */
1972 first = public->next;
1973 last = public->prev;
1975 /* Publish private list in place of public in RCU-safe way */
1976 private->prev->next = public;
1977 private->next->prev = public;
1978 rcu_assign_pointer(public->next, private->next);
1979 public->prev = private->prev;
1983 /* When all readers are done with the old public list,
1984 * attach it in place of private */
1985 private->next = first;
1986 private->prev = last;
1987 first->prev = private;
1988 last->next = private;
1993 * smk_parse_label_list - parse list of Smack labels, separated by spaces
1995 * @data: the string to parse
1996 * @private: destination list
1998 * Returns zero on success or error code, as appropriate
2000 static int smk_parse_label_list(char *data, struct list_head *list)
2003 struct smack_known *skp;
2004 struct smack_known_list_elem *sklep;
2006 while ((tok = strsep(&data, " ")) != NULL) {
2010 skp = smk_import_entry(tok, 0);
2012 return PTR_ERR(skp);
2014 sklep = kzalloc(sizeof(*sklep), GFP_KERNEL);
2018 sklep->smk_label = skp;
2019 list_add(&sklep->list, list);
2026 * smk_destroy_label_list - destroy a list of smack_known_list_elem
2027 * @head: header pointer of the list to destroy
2029 void smk_destroy_label_list(struct list_head *list)
2031 struct smack_known_list_elem *sklep;
2032 struct smack_known_list_elem *sklep2;
2034 list_for_each_entry_safe(sklep, sklep2, list, list)
2037 INIT_LIST_HEAD(list);
2041 * smk_write_onlycap - write() for smackfs/onlycap
2042 * @file: file pointer, not actually used
2043 * @buf: where to get the data from
2044 * @count: bytes sent
2045 * @ppos: where to start
2047 * Returns number of bytes written or error code, as appropriate
2049 static ssize_t smk_write_onlycap(struct file *file, const char __user *buf,
2050 size_t count, loff_t *ppos)
2053 LIST_HEAD(list_tmp);
2056 if (!smack_privileged(CAP_MAC_ADMIN))
2059 data = kzalloc(count + 1, GFP_KERNEL);
2063 if (copy_from_user(data, buf, count) != 0) {
2068 rc = smk_parse_label_list(data, &list_tmp);
2072 * Clear the smack_onlycap on invalid label errors. This means
2073 * that we can pass a null string to unset the onlycap value.
2075 * Importing will also reject a label beginning with '-',
2076 * so "-usecapabilities" will also work.
2078 * But do so only on invalid label, not on system errors.
2079 * The invalid label must be first to count as clearing attempt.
2081 if (!rc || (rc == -EINVAL && list_empty(&list_tmp))) {
2082 mutex_lock(&smack_onlycap_lock);
2083 smk_list_swap_rcu(&smack_onlycap_list, &list_tmp);
2084 mutex_unlock(&smack_onlycap_lock);
2088 smk_destroy_label_list(&list_tmp);
2093 static const struct file_operations smk_onlycap_ops = {
2094 .open = smk_open_onlycap,
2096 .write = smk_write_onlycap,
2097 .llseek = seq_lseek,
2098 .release = seq_release,
2101 #ifdef CONFIG_SECURITY_SMACK_BRINGUP
2103 * smk_read_unconfined - read() for smackfs/unconfined
2104 * @filp: file pointer, not actually used
2105 * @buf: where to put the result
2106 * @cn: maximum to send along
2107 * @ppos: where to start
2109 * Returns number of bytes read or error code, as appropriate
2111 static ssize_t smk_read_unconfined(struct file *filp, char __user *buf,
2112 size_t cn, loff_t *ppos)
2115 ssize_t rc = -EINVAL;
2121 if (smack_unconfined != NULL)
2122 smack = smack_unconfined->smk_known;
2124 asize = strlen(smack) + 1;
2127 rc = simple_read_from_buffer(buf, cn, ppos, smack, asize);
2133 * smk_write_unconfined - write() for smackfs/unconfined
2134 * @file: file pointer, not actually used
2135 * @buf: where to get the data from
2136 * @count: bytes sent
2137 * @ppos: where to start
2139 * Returns number of bytes written or error code, as appropriate
2141 static ssize_t smk_write_unconfined(struct file *file, const char __user *buf,
2142 size_t count, loff_t *ppos)
2145 struct smack_known *skp;
2148 if (!smack_privileged(CAP_MAC_ADMIN))
2151 data = kzalloc(count + 1, GFP_KERNEL);
2155 if (copy_from_user(data, buf, count) != 0) {
2161 * Clear the smack_unconfined on invalid label errors. This means
2162 * that we can pass a null string to unset the unconfined value.
2164 * Importing will also reject a label beginning with '-',
2165 * so "-confine" will also work.
2167 * But do so only on invalid label, not on system errors.
2169 skp = smk_import_entry(data, count);
2170 if (PTR_ERR(skp) == -EINVAL)
2172 else if (IS_ERR(skp)) {
2177 smack_unconfined = skp;
2184 static const struct file_operations smk_unconfined_ops = {
2185 .read = smk_read_unconfined,
2186 .write = smk_write_unconfined,
2187 .llseek = default_llseek,
2189 #endif /* CONFIG_SECURITY_SMACK_BRINGUP */
2192 * smk_read_logging - read() for /smack/logging
2193 * @filp: file pointer, not actually used
2194 * @buf: where to put the result
2195 * @cn: maximum to send along
2196 * @ppos: where to start
2198 * Returns number of bytes read or error code, as appropriate
2200 static ssize_t smk_read_logging(struct file *filp, char __user *buf,
2201 size_t count, loff_t *ppos)
2209 sprintf(temp, "%d\n", log_policy);
2210 rc = simple_read_from_buffer(buf, count, ppos, temp, strlen(temp));
2215 * smk_write_logging - write() for /smack/logging
2216 * @file: file pointer, not actually used
2217 * @buf: where to get the data from
2218 * @count: bytes sent
2219 * @ppos: where to start
2221 * Returns number of bytes written or error code, as appropriate
2223 static ssize_t smk_write_logging(struct file *file, const char __user *buf,
2224 size_t count, loff_t *ppos)
2229 if (!smack_privileged(CAP_MAC_ADMIN))
2232 if (count >= sizeof(temp) || count == 0)
2235 if (copy_from_user(temp, buf, count) != 0)
2240 if (sscanf(temp, "%d", &i) != 1)
2250 static const struct file_operations smk_logging_ops = {
2251 .read = smk_read_logging,
2252 .write = smk_write_logging,
2253 .llseek = default_llseek,
2257 * Seq_file read operations for /smack/load-self
2260 static void *load_self_seq_start(struct seq_file *s, loff_t *pos)
2262 struct task_smack *tsp = current_security();
2264 return smk_seq_start(s, pos, &tsp->smk_rules);
2267 static void *load_self_seq_next(struct seq_file *s, void *v, loff_t *pos)
2269 struct task_smack *tsp = current_security();
2271 return smk_seq_next(s, v, pos, &tsp->smk_rules);
2274 static int load_self_seq_show(struct seq_file *s, void *v)
2276 struct list_head *list = v;
2277 struct smack_rule *srp =
2278 list_entry_rcu(list, struct smack_rule, list);
2280 smk_rule_show(s, srp, SMK_LABELLEN);
2285 static const struct seq_operations load_self_seq_ops = {
2286 .start = load_self_seq_start,
2287 .next = load_self_seq_next,
2288 .show = load_self_seq_show,
2289 .stop = smk_seq_stop,
2294 * smk_open_load_self - open() for /smack/load-self2
2295 * @inode: inode structure representing file
2296 * @file: "load" file pointer
2298 * For reading, use load_seq_* seq_file reading operations.
2300 static int smk_open_load_self(struct inode *inode, struct file *file)
2302 return seq_open(file, &load_self_seq_ops);
2306 * smk_write_load_self - write() for /smack/load-self
2307 * @file: file pointer, not actually used
2308 * @buf: where to get the data from
2309 * @count: bytes sent
2310 * @ppos: where to start - must be 0
2313 static ssize_t smk_write_load_self(struct file *file, const char __user *buf,
2314 size_t count, loff_t *ppos)
2316 struct task_smack *tsp = current_security();
2318 return smk_write_rules_list(file, buf, count, ppos, &tsp->smk_rules,
2319 &tsp->smk_rules_lock, SMK_FIXED24_FMT);
2322 static const struct file_operations smk_load_self_ops = {
2323 .open = smk_open_load_self,
2325 .llseek = seq_lseek,
2326 .write = smk_write_load_self,
2327 .release = seq_release,
2331 * smk_user_access - handle access check transaction
2332 * @file: file pointer
2333 * @buf: data from user space
2334 * @count: bytes sent
2335 * @ppos: where to start - must be 0
2337 static ssize_t smk_user_access(struct file *file, const char __user *buf,
2338 size_t count, loff_t *ppos, int format)
2340 struct smack_parsed_rule rule;
2344 data = simple_transaction_get(file, buf, count);
2346 return PTR_ERR(data);
2348 if (format == SMK_FIXED24_FMT) {
2349 if (count < SMK_LOADLEN)
2351 res = smk_parse_rule(data, &rule, 0);
2354 * simple_transaction_get() returns null-terminated data
2356 res = smk_parse_long_rule(data, &rule, 0, 3);
2360 res = smk_access(rule.smk_subject, rule.smk_object,
2361 rule.smk_access1, NULL);
2362 else if (res != -ENOENT)
2366 * smk_access() can return a value > 0 in the "bringup" case.
2368 data[0] = res >= 0 ? '1' : '0';
2371 simple_transaction_set(file, 2);
2373 if (format == SMK_FIXED24_FMT)
2379 * smk_write_access - handle access check transaction
2380 * @file: file pointer
2381 * @buf: data from user space
2382 * @count: bytes sent
2383 * @ppos: where to start - must be 0
2385 static ssize_t smk_write_access(struct file *file, const char __user *buf,
2386 size_t count, loff_t *ppos)
2388 return smk_user_access(file, buf, count, ppos, SMK_FIXED24_FMT);
2391 static const struct file_operations smk_access_ops = {
2392 .write = smk_write_access,
2393 .read = simple_transaction_read,
2394 .release = simple_transaction_release,
2395 .llseek = generic_file_llseek,
2400 * Seq_file read operations for /smack/load2
2403 static int load2_seq_show(struct seq_file *s, void *v)
2405 struct list_head *list = v;
2406 struct smack_master_list *smlp =
2407 list_entry_rcu(list, struct smack_master_list, list);
2409 smk_rule_show(s, smlp->smk_rule, SMK_LONGLABEL);
2414 static const struct seq_operations load2_seq_ops = {
2415 .start = load2_seq_start,
2416 .next = load2_seq_next,
2417 .show = load2_seq_show,
2418 .stop = smk_seq_stop,
2422 * smk_open_load2 - open() for /smack/load2
2423 * @inode: inode structure representing file
2424 * @file: "load2" file pointer
2426 * For reading, use load2_seq_* seq_file reading operations.
2428 static int smk_open_load2(struct inode *inode, struct file *file)
2430 return seq_open(file, &load2_seq_ops);
2434 * smk_write_load2 - write() for /smack/load2
2435 * @file: file pointer, not actually used
2436 * @buf: where to get the data from
2437 * @count: bytes sent
2438 * @ppos: where to start - must be 0
2441 static ssize_t smk_write_load2(struct file *file, const char __user *buf,
2442 size_t count, loff_t *ppos)
2445 * Must have privilege.
2447 if (!smack_privileged(CAP_MAC_ADMIN))
2450 return smk_write_rules_list(file, buf, count, ppos, NULL, NULL,
2454 static const struct file_operations smk_load2_ops = {
2455 .open = smk_open_load2,
2457 .llseek = seq_lseek,
2458 .write = smk_write_load2,
2459 .release = seq_release,
2463 * Seq_file read operations for /smack/load-self2
2466 static void *load_self2_seq_start(struct seq_file *s, loff_t *pos)
2468 struct task_smack *tsp = current_security();
2470 return smk_seq_start(s, pos, &tsp->smk_rules);
2473 static void *load_self2_seq_next(struct seq_file *s, void *v, loff_t *pos)
2475 struct task_smack *tsp = current_security();
2477 return smk_seq_next(s, v, pos, &tsp->smk_rules);
2480 static int load_self2_seq_show(struct seq_file *s, void *v)
2482 struct list_head *list = v;
2483 struct smack_rule *srp =
2484 list_entry_rcu(list, struct smack_rule, list);
2486 smk_rule_show(s, srp, SMK_LONGLABEL);
2491 static const struct seq_operations load_self2_seq_ops = {
2492 .start = load_self2_seq_start,
2493 .next = load_self2_seq_next,
2494 .show = load_self2_seq_show,
2495 .stop = smk_seq_stop,
2499 * smk_open_load_self2 - open() for /smack/load-self2
2500 * @inode: inode structure representing file
2501 * @file: "load" file pointer
2503 * For reading, use load_seq_* seq_file reading operations.
2505 static int smk_open_load_self2(struct inode *inode, struct file *file)
2507 return seq_open(file, &load_self2_seq_ops);
2511 * smk_write_load_self2 - write() for /smack/load-self2
2512 * @file: file pointer, not actually used
2513 * @buf: where to get the data from
2514 * @count: bytes sent
2515 * @ppos: where to start - must be 0
2518 static ssize_t smk_write_load_self2(struct file *file, const char __user *buf,
2519 size_t count, loff_t *ppos)
2521 struct task_smack *tsp = current_security();
2523 return smk_write_rules_list(file, buf, count, ppos, &tsp->smk_rules,
2524 &tsp->smk_rules_lock, SMK_LONG_FMT);
2527 static const struct file_operations smk_load_self2_ops = {
2528 .open = smk_open_load_self2,
2530 .llseek = seq_lseek,
2531 .write = smk_write_load_self2,
2532 .release = seq_release,
2536 * smk_write_access2 - handle access check transaction
2537 * @file: file pointer
2538 * @buf: data from user space
2539 * @count: bytes sent
2540 * @ppos: where to start - must be 0
2542 static ssize_t smk_write_access2(struct file *file, const char __user *buf,
2543 size_t count, loff_t *ppos)
2545 return smk_user_access(file, buf, count, ppos, SMK_LONG_FMT);
2548 static const struct file_operations smk_access2_ops = {
2549 .write = smk_write_access2,
2550 .read = simple_transaction_read,
2551 .release = simple_transaction_release,
2552 .llseek = generic_file_llseek,
2556 * smk_write_revoke_subj - write() for /smack/revoke-subject
2557 * @file: file pointer
2558 * @buf: data from user space
2559 * @count: bytes sent
2560 * @ppos: where to start - must be 0
2562 static ssize_t smk_write_revoke_subj(struct file *file, const char __user *buf,
2563 size_t count, loff_t *ppos)
2567 struct smack_known *skp;
2568 struct smack_rule *sp;
2569 struct list_head *rule_list;
2570 struct mutex *rule_lock;
2576 if (!smack_privileged(CAP_MAC_ADMIN))
2579 if (count == 0 || count > SMK_LONGLABEL)
2582 data = kzalloc(count, GFP_KERNEL);
2586 if (copy_from_user(data, buf, count) != 0) {
2591 cp = smk_parse_smack(data, count);
2597 skp = smk_find_entry(cp);
2601 rule_list = &skp->smk_rules;
2602 rule_lock = &skp->smk_rules_lock;
2604 mutex_lock(rule_lock);
2606 list_for_each_entry_rcu(sp, rule_list, list)
2609 mutex_unlock(rule_lock);
2619 static const struct file_operations smk_revoke_subj_ops = {
2620 .write = smk_write_revoke_subj,
2621 .read = simple_transaction_read,
2622 .release = simple_transaction_release,
2623 .llseek = generic_file_llseek,
2627 * smk_init_sysfs - initialize /sys/fs/smackfs
2630 static int smk_init_sysfs(void)
2632 return sysfs_create_mount_point(fs_kobj, "smackfs");
2636 * smk_write_change_rule - write() for /smack/change-rule
2637 * @file: file pointer
2638 * @buf: data from user space
2639 * @count: bytes sent
2640 * @ppos: where to start - must be 0
2642 static ssize_t smk_write_change_rule(struct file *file, const char __user *buf,
2643 size_t count, loff_t *ppos)
2646 * Must have privilege.
2648 if (!smack_privileged(CAP_MAC_ADMIN))
2651 return smk_write_rules_list(file, buf, count, ppos, NULL, NULL,
2655 static const struct file_operations smk_change_rule_ops = {
2656 .write = smk_write_change_rule,
2657 .read = simple_transaction_read,
2658 .release = simple_transaction_release,
2659 .llseek = generic_file_llseek,
2663 * smk_read_syslog - read() for smackfs/syslog
2664 * @filp: file pointer, not actually used
2665 * @buf: where to put the result
2666 * @cn: maximum to send along
2667 * @ppos: where to start
2669 * Returns number of bytes read or error code, as appropriate
2671 static ssize_t smk_read_syslog(struct file *filp, char __user *buf,
2672 size_t cn, loff_t *ppos)
2674 struct smack_known *skp;
2675 ssize_t rc = -EINVAL;
2681 if (smack_syslog_label == NULL)
2682 skp = &smack_known_star;
2684 skp = smack_syslog_label;
2686 asize = strlen(skp->smk_known) + 1;
2689 rc = simple_read_from_buffer(buf, cn, ppos, skp->smk_known,
2696 * smk_write_syslog - write() for smackfs/syslog
2697 * @file: file pointer, not actually used
2698 * @buf: where to get the data from
2699 * @count: bytes sent
2700 * @ppos: where to start
2702 * Returns number of bytes written or error code, as appropriate
2704 static ssize_t smk_write_syslog(struct file *file, const char __user *buf,
2705 size_t count, loff_t *ppos)
2708 struct smack_known *skp;
2711 if (!smack_privileged(CAP_MAC_ADMIN))
2714 data = kzalloc(count + 1, GFP_KERNEL);
2718 if (copy_from_user(data, buf, count) != 0)
2721 skp = smk_import_entry(data, count);
2725 smack_syslog_label = skp;
2732 static const struct file_operations smk_syslog_ops = {
2733 .read = smk_read_syslog,
2734 .write = smk_write_syslog,
2735 .llseek = default_llseek,
2739 * Seq_file read operations for /smack/relabel-self
2742 static void *relabel_self_seq_start(struct seq_file *s, loff_t *pos)
2744 struct task_smack *tsp = current_security();
2746 return smk_seq_start(s, pos, &tsp->smk_relabel);
2749 static void *relabel_self_seq_next(struct seq_file *s, void *v, loff_t *pos)
2751 struct task_smack *tsp = current_security();
2753 return smk_seq_next(s, v, pos, &tsp->smk_relabel);
2756 static int relabel_self_seq_show(struct seq_file *s, void *v)
2758 struct list_head *list = v;
2759 struct smack_known_list_elem *sklep =
2760 list_entry(list, struct smack_known_list_elem, list);
2762 seq_puts(s, sklep->smk_label->smk_known);
2768 static const struct seq_operations relabel_self_seq_ops = {
2769 .start = relabel_self_seq_start,
2770 .next = relabel_self_seq_next,
2771 .show = relabel_self_seq_show,
2772 .stop = smk_seq_stop,
2776 * smk_open_relabel_self - open() for /smack/relabel-self
2777 * @inode: inode structure representing file
2778 * @file: "relabel-self" file pointer
2780 * Connect our relabel_self_seq_* operations with /smack/relabel-self
2783 static int smk_open_relabel_self(struct inode *inode, struct file *file)
2785 return seq_open(file, &relabel_self_seq_ops);
2789 * smk_write_relabel_self - write() for /smack/relabel-self
2790 * @file: file pointer, not actually used
2791 * @buf: where to get the data from
2792 * @count: bytes sent
2793 * @ppos: where to start - must be 0
2796 static ssize_t smk_write_relabel_self(struct file *file, const char __user *buf,
2797 size_t count, loff_t *ppos)
2801 LIST_HEAD(list_tmp);
2804 * Must have privilege.
2806 if (!smack_privileged(CAP_MAC_ADMIN))
2810 * Enough data must be present.
2815 data = kzalloc(count + 1, GFP_KERNEL);
2819 if (copy_from_user(data, buf, count) != 0) {
2824 rc = smk_parse_label_list(data, &list_tmp);
2827 if (!rc || (rc == -EINVAL && list_empty(&list_tmp))) {
2829 struct task_smack *tsp;
2831 new = prepare_creds();
2836 tsp = new->security;
2837 smk_destroy_label_list(&tsp->smk_relabel);
2838 list_splice(&list_tmp, &tsp->smk_relabel);
2843 smk_destroy_label_list(&list_tmp);
2847 static const struct file_operations smk_relabel_self_ops = {
2848 .open = smk_open_relabel_self,
2850 .llseek = seq_lseek,
2851 .write = smk_write_relabel_self,
2852 .release = seq_release,
2856 * smk_read_ptrace - read() for /smack/ptrace
2857 * @filp: file pointer, not actually used
2858 * @buf: where to put the result
2859 * @count: maximum to send along
2860 * @ppos: where to start
2862 * Returns number of bytes read or error code, as appropriate
2864 static ssize_t smk_read_ptrace(struct file *filp, char __user *buf,
2865 size_t count, loff_t *ppos)
2873 sprintf(temp, "%d\n", smack_ptrace_rule);
2874 rc = simple_read_from_buffer(buf, count, ppos, temp, strlen(temp));
2879 * smk_write_ptrace - write() for /smack/ptrace
2880 * @file: file pointer
2881 * @buf: data from user space
2882 * @count: bytes sent
2883 * @ppos: where to start - must be 0
2885 static ssize_t smk_write_ptrace(struct file *file, const char __user *buf,
2886 size_t count, loff_t *ppos)
2891 if (!smack_privileged(CAP_MAC_ADMIN))
2894 if (*ppos != 0 || count >= sizeof(temp) || count == 0)
2897 if (copy_from_user(temp, buf, count) != 0)
2902 if (sscanf(temp, "%d", &i) != 1)
2904 if (i < SMACK_PTRACE_DEFAULT || i > SMACK_PTRACE_MAX)
2906 smack_ptrace_rule = i;
2911 static const struct file_operations smk_ptrace_ops = {
2912 .write = smk_write_ptrace,
2913 .read = smk_read_ptrace,
2914 .llseek = default_llseek,
2918 * smk_fill_super - fill the smackfs superblock
2919 * @sb: the empty superblock
2923 * Fill in the well known entries for the smack filesystem
2925 * Returns 0 on success, an error code on failure
2927 static int smk_fill_super(struct super_block *sb, void *data, int silent)
2930 struct inode *root_inode;
2932 static struct tree_descr smack_files[] = {
2934 "load", &smk_load_ops, S_IRUGO|S_IWUSR},
2936 "cipso", &smk_cipso_ops, S_IRUGO|S_IWUSR},
2938 "doi", &smk_doi_ops, S_IRUGO|S_IWUSR},
2940 "direct", &smk_direct_ops, S_IRUGO|S_IWUSR},
2942 "ambient", &smk_ambient_ops, S_IRUGO|S_IWUSR},
2944 "netlabel", &smk_net4addr_ops, S_IRUGO|S_IWUSR},
2946 "onlycap", &smk_onlycap_ops, S_IRUGO|S_IWUSR},
2948 "logging", &smk_logging_ops, S_IRUGO|S_IWUSR},
2950 "load-self", &smk_load_self_ops, S_IRUGO|S_IWUGO},
2952 "access", &smk_access_ops, S_IRUGO|S_IWUGO},
2954 "mapped", &smk_mapped_ops, S_IRUGO|S_IWUSR},
2956 "load2", &smk_load2_ops, S_IRUGO|S_IWUSR},
2957 [SMK_LOAD_SELF2] = {
2958 "load-self2", &smk_load_self2_ops, S_IRUGO|S_IWUGO},
2960 "access2", &smk_access2_ops, S_IRUGO|S_IWUGO},
2962 "cipso2", &smk_cipso2_ops, S_IRUGO|S_IWUSR},
2963 [SMK_REVOKE_SUBJ] = {
2964 "revoke-subject", &smk_revoke_subj_ops,
2966 [SMK_CHANGE_RULE] = {
2967 "change-rule", &smk_change_rule_ops, S_IRUGO|S_IWUSR},
2969 "syslog", &smk_syslog_ops, S_IRUGO|S_IWUSR},
2971 "ptrace", &smk_ptrace_ops, S_IRUGO|S_IWUSR},
2972 #ifdef CONFIG_SECURITY_SMACK_BRINGUP
2973 [SMK_UNCONFINED] = {
2974 "unconfined", &smk_unconfined_ops, S_IRUGO|S_IWUSR},
2976 #if IS_ENABLED(CONFIG_IPV6)
2978 "ipv6host", &smk_net6addr_ops, S_IRUGO|S_IWUSR},
2979 #endif /* CONFIG_IPV6 */
2980 [SMK_RELABEL_SELF] = {
2981 "relabel-self", &smk_relabel_self_ops,
2987 rc = simple_fill_super(sb, SMACK_MAGIC, smack_files);
2989 printk(KERN_ERR "%s failed %d while creating inodes\n",
2994 root_inode = d_inode(sb->s_root);
3000 * smk_mount - get the smackfs superblock
3001 * @fs_type: passed along without comment
3002 * @flags: passed along without comment
3003 * @dev_name: passed along without comment
3004 * @data: passed along without comment
3006 * Just passes everything along.
3008 * Returns what the lower level code does.
3010 static struct dentry *smk_mount(struct file_system_type *fs_type,
3011 int flags, const char *dev_name, void *data)
3013 return mount_single(fs_type, flags, data, smk_fill_super);
3016 static struct file_system_type smk_fs_type = {
3019 .kill_sb = kill_litter_super,
3022 static struct vfsmount *smackfs_mount;
3024 static int __init smk_preset_netlabel(struct smack_known *skp)
3026 skp->smk_netlabel.domain = skp->smk_known;
3027 skp->smk_netlabel.flags =
3028 NETLBL_SECATTR_DOMAIN | NETLBL_SECATTR_MLS_LVL;
3029 return smk_netlbl_mls(smack_cipso_direct, skp->smk_known,
3030 &skp->smk_netlabel, strlen(skp->smk_known));
3034 * init_smk_fs - get the smackfs superblock
3036 * register the smackfs
3038 * Do not register smackfs if Smack wasn't enabled
3039 * on boot. We can not put this method normally under the
3040 * smack_init() code path since the security subsystem get
3041 * initialized before the vfs caches.
3043 * Returns true if we were not chosen on boot or if
3044 * we were chosen and filesystem registration succeeded.
3046 static int __init init_smk_fs(void)
3051 if (smack_enabled == 0)
3054 err = smk_init_sysfs();
3056 printk(KERN_ERR "smackfs: sysfs mountpoint problem.\n");
3058 err = register_filesystem(&smk_fs_type);
3060 smackfs_mount = kern_mount(&smk_fs_type);
3061 if (IS_ERR(smackfs_mount)) {
3062 printk(KERN_ERR "smackfs: could not mount!\n");
3063 err = PTR_ERR(smackfs_mount);
3064 smackfs_mount = NULL;
3069 smk_unlbl_ambient(NULL);
3071 rc = smk_preset_netlabel(&smack_known_floor);
3072 if (err == 0 && rc < 0)
3074 rc = smk_preset_netlabel(&smack_known_hat);
3075 if (err == 0 && rc < 0)
3077 rc = smk_preset_netlabel(&smack_known_huh);
3078 if (err == 0 && rc < 0)
3080 rc = smk_preset_netlabel(&smack_known_invalid);
3081 if (err == 0 && rc < 0)
3083 rc = smk_preset_netlabel(&smack_known_star);
3084 if (err == 0 && rc < 0)
3086 rc = smk_preset_netlabel(&smack_known_web);
3087 if (err == 0 && rc < 0)
3093 __initcall(init_smk_fs);