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 | __GFP_NOFAIL);
720 doip->map.std = NULL;
721 doip->doi = smk_cipso_doi_value;
722 doip->type = CIPSO_V4_MAP_PASS;
723 doip->tags[0] = CIPSO_V4_TAG_RBITMAP;
724 for (rc = 1; rc < CIPSO_V4_TAG_MAXCNT; rc++)
725 doip->tags[rc] = CIPSO_V4_TAG_INVALID;
727 rc = netlbl_cfg_cipsov4_add(doip, &nai);
729 printk(KERN_WARNING "%s:%d cipso add rc = %d\n",
730 __func__, __LINE__, rc);
734 rc = netlbl_cfg_cipsov4_map_add(doip->doi, NULL, NULL, NULL, &nai);
736 printk(KERN_WARNING "%s:%d map add rc = %d\n",
737 __func__, __LINE__, rc);
738 netlbl_cfg_cipsov4_del(doip->doi, &nai);
744 * smk_unlbl_ambient - initialize the unlabeled domain
745 * @oldambient: previous domain string
747 static void smk_unlbl_ambient(char *oldambient)
750 struct netlbl_audit nai;
752 smk_netlabel_audit_set(&nai);
754 if (oldambient != NULL) {
755 rc = netlbl_cfg_map_del(oldambient, PF_INET, NULL, NULL, &nai);
757 printk(KERN_WARNING "%s:%d remove rc = %d\n",
758 __func__, __LINE__, rc);
760 if (smack_net_ambient == NULL)
761 smack_net_ambient = &smack_known_floor;
763 rc = netlbl_cfg_unlbl_map_add(smack_net_ambient->smk_known, PF_INET,
766 printk(KERN_WARNING "%s:%d add rc = %d\n",
767 __func__, __LINE__, rc);
771 * Seq_file read operations for /smack/cipso
774 static void *cipso_seq_start(struct seq_file *s, loff_t *pos)
776 return smk_seq_start(s, pos, &smack_known_list);
779 static void *cipso_seq_next(struct seq_file *s, void *v, loff_t *pos)
781 return smk_seq_next(s, v, pos, &smack_known_list);
785 * Print cipso labels in format:
786 * label level[/cat[,cat]]
788 static int cipso_seq_show(struct seq_file *s, void *v)
790 struct list_head *list = v;
791 struct smack_known *skp =
792 list_entry_rcu(list, struct smack_known, list);
793 struct netlbl_lsm_catmap *cmp = skp->smk_netlabel.attr.mls.cat;
798 * Don't show a label that could not have been set using
799 * /smack/cipso. This is in support of the notion that
800 * anything read from /smack/cipso ought to be writeable
803 * /smack/cipso2 should be used instead.
805 if (strlen(skp->smk_known) >= SMK_LABELLEN)
808 seq_printf(s, "%s %3d", skp->smk_known, skp->smk_netlabel.attr.mls.lvl);
810 for (i = netlbl_catmap_walk(cmp, 0); i >= 0;
811 i = netlbl_catmap_walk(cmp, i + 1)) {
812 seq_printf(s, "%c%d", sep, i);
821 static const struct seq_operations cipso_seq_ops = {
822 .start = cipso_seq_start,
823 .next = cipso_seq_next,
824 .show = cipso_seq_show,
825 .stop = smk_seq_stop,
829 * smk_open_cipso - open() for /smack/cipso
830 * @inode: inode structure representing file
831 * @file: "cipso" file pointer
833 * Connect our cipso_seq_* operations with /smack/cipso
836 static int smk_open_cipso(struct inode *inode, struct file *file)
838 return seq_open(file, &cipso_seq_ops);
842 * smk_set_cipso - do the work for write() for cipso and cipso2
843 * @file: file pointer, not actually used
844 * @buf: where to get the data from
846 * @ppos: where to start
847 * @format: /smack/cipso or /smack/cipso2
849 * Accepts only one cipso rule per write call.
850 * Returns number of bytes written or error code, as appropriate
852 static ssize_t smk_set_cipso(struct file *file, const char __user *buf,
853 size_t count, loff_t *ppos, int format)
855 struct netlbl_lsm_catmap *old_cat;
856 struct smack_known *skp;
857 struct netlbl_lsm_secattr ncats;
858 char mapcatset[SMK_CIPSOLEN];
862 ssize_t rc = -EINVAL;
869 * Must have privilege.
871 * Enough data must be present.
873 if (!smack_privileged(CAP_MAC_ADMIN))
877 if (format == SMK_FIXED24_FMT &&
878 (count < SMK_CIPSOMIN || count > SMK_CIPSOMAX))
880 if (count > PAGE_SIZE)
883 data = memdup_user_nul(buf, count);
885 return PTR_ERR(data);
889 * Only allow one writer at a time. Writes should be
890 * quite rare and small in any case.
892 mutex_lock(&smack_cipso_lock);
894 skp = smk_import_entry(rule, 0);
900 if (format == SMK_FIXED24_FMT)
901 rule += SMK_LABELLEN;
903 rule += strlen(skp->smk_known) + 1;
905 if (rule > data + count) {
910 ret = sscanf(rule, "%d", &maplevel);
911 if (ret != 1 || maplevel < 0 || maplevel > SMACK_CIPSO_MAXLEVEL)
914 rule += SMK_DIGITLEN;
915 if (rule > data + count) {
920 ret = sscanf(rule, "%d", &catlen);
921 if (ret != 1 || catlen > SMACK_CIPSO_MAXCATNUM)
924 if (format == SMK_FIXED24_FMT &&
925 count != (SMK_CIPSOMIN + catlen * SMK_DIGITLEN))
928 memset(mapcatset, 0, sizeof(mapcatset));
930 for (i = 0; i < catlen; i++) {
931 rule += SMK_DIGITLEN;
932 if (rule > data + count) {
936 ret = sscanf(rule, "%u", &cat);
937 if (ret != 1 || cat > SMACK_CIPSO_MAXCATNUM)
940 smack_catset_bit(cat, mapcatset);
943 rc = smk_netlbl_mls(maplevel, mapcatset, &ncats, SMK_CIPSOLEN);
945 old_cat = skp->smk_netlabel.attr.mls.cat;
946 skp->smk_netlabel.attr.mls.cat = ncats.attr.mls.cat;
947 skp->smk_netlabel.attr.mls.lvl = ncats.attr.mls.lvl;
949 netlbl_catmap_free(old_cat);
954 mutex_unlock(&smack_cipso_lock);
960 * smk_write_cipso - write() for /smack/cipso
961 * @file: file pointer, not actually used
962 * @buf: where to get the data from
964 * @ppos: where to start
966 * Accepts only one cipso rule per write call.
967 * Returns number of bytes written or error code, as appropriate
969 static ssize_t smk_write_cipso(struct file *file, const char __user *buf,
970 size_t count, loff_t *ppos)
972 return smk_set_cipso(file, buf, count, ppos, SMK_FIXED24_FMT);
975 static const struct file_operations smk_cipso_ops = {
976 .open = smk_open_cipso,
979 .write = smk_write_cipso,
980 .release = seq_release,
984 * Seq_file read operations for /smack/cipso2
988 * Print cipso labels in format:
989 * label level[/cat[,cat]]
991 static int cipso2_seq_show(struct seq_file *s, void *v)
993 struct list_head *list = v;
994 struct smack_known *skp =
995 list_entry_rcu(list, struct smack_known, list);
996 struct netlbl_lsm_catmap *cmp = skp->smk_netlabel.attr.mls.cat;
1000 seq_printf(s, "%s %3d", skp->smk_known, skp->smk_netlabel.attr.mls.lvl);
1002 for (i = netlbl_catmap_walk(cmp, 0); i >= 0;
1003 i = netlbl_catmap_walk(cmp, i + 1)) {
1004 seq_printf(s, "%c%d", sep, i);
1013 static const struct seq_operations cipso2_seq_ops = {
1014 .start = cipso_seq_start,
1015 .next = cipso_seq_next,
1016 .show = cipso2_seq_show,
1017 .stop = smk_seq_stop,
1021 * smk_open_cipso2 - open() for /smack/cipso2
1022 * @inode: inode structure representing file
1023 * @file: "cipso2" file pointer
1025 * Connect our cipso_seq_* operations with /smack/cipso2
1028 static int smk_open_cipso2(struct inode *inode, struct file *file)
1030 return seq_open(file, &cipso2_seq_ops);
1034 * smk_write_cipso2 - write() for /smack/cipso2
1035 * @file: file pointer, not actually used
1036 * @buf: where to get the data from
1037 * @count: bytes sent
1038 * @ppos: where to start
1040 * Accepts only one cipso rule per write call.
1041 * Returns number of bytes written or error code, as appropriate
1043 static ssize_t smk_write_cipso2(struct file *file, const char __user *buf,
1044 size_t count, loff_t *ppos)
1046 return smk_set_cipso(file, buf, count, ppos, SMK_LONG_FMT);
1049 static const struct file_operations smk_cipso2_ops = {
1050 .open = smk_open_cipso2,
1052 .llseek = seq_lseek,
1053 .write = smk_write_cipso2,
1054 .release = seq_release,
1058 * Seq_file read operations for /smack/netlabel
1061 static void *net4addr_seq_start(struct seq_file *s, loff_t *pos)
1063 return smk_seq_start(s, pos, &smk_net4addr_list);
1066 static void *net4addr_seq_next(struct seq_file *s, void *v, loff_t *pos)
1068 return smk_seq_next(s, v, pos, &smk_net4addr_list);
1072 * Print host/label pairs
1074 static int net4addr_seq_show(struct seq_file *s, void *v)
1076 struct list_head *list = v;
1077 struct smk_net4addr *skp =
1078 list_entry_rcu(list, struct smk_net4addr, list);
1079 char *kp = SMACK_CIPSO_OPTION;
1081 if (skp->smk_label != NULL)
1082 kp = skp->smk_label->smk_known;
1083 seq_printf(s, "%pI4/%d %s\n", &skp->smk_host.s_addr,
1084 skp->smk_masks, kp);
1089 static const struct seq_operations net4addr_seq_ops = {
1090 .start = net4addr_seq_start,
1091 .next = net4addr_seq_next,
1092 .show = net4addr_seq_show,
1093 .stop = smk_seq_stop,
1097 * smk_open_net4addr - open() for /smack/netlabel
1098 * @inode: inode structure representing file
1099 * @file: "netlabel" file pointer
1101 * Connect our net4addr_seq_* operations with /smack/netlabel
1104 static int smk_open_net4addr(struct inode *inode, struct file *file)
1106 return seq_open(file, &net4addr_seq_ops);
1110 * smk_net4addr_insert
1111 * @new : netlabel to insert
1113 * This helper insert netlabel in the smack_net4addrs list
1114 * sorted by netmask length (longest to smallest)
1115 * locked by &smk_net4addr_lock in smk_write_net4addr
1118 static void smk_net4addr_insert(struct smk_net4addr *new)
1120 struct smk_net4addr *m;
1121 struct smk_net4addr *m_next;
1123 if (list_empty(&smk_net4addr_list)) {
1124 list_add_rcu(&new->list, &smk_net4addr_list);
1128 m = list_entry_rcu(smk_net4addr_list.next,
1129 struct smk_net4addr, list);
1131 /* the comparison '>' is a bit hacky, but works */
1132 if (new->smk_masks > m->smk_masks) {
1133 list_add_rcu(&new->list, &smk_net4addr_list);
1137 list_for_each_entry_rcu(m, &smk_net4addr_list, list) {
1138 if (list_is_last(&m->list, &smk_net4addr_list)) {
1139 list_add_rcu(&new->list, &m->list);
1142 m_next = list_entry_rcu(m->list.next,
1143 struct smk_net4addr, list);
1144 if (new->smk_masks > m_next->smk_masks) {
1145 list_add_rcu(&new->list, &m->list);
1153 * smk_write_net4addr - write() for /smack/netlabel
1154 * @file: file pointer, not actually used
1155 * @buf: where to get the data from
1156 * @count: bytes sent
1157 * @ppos: where to start
1159 * Accepts only one net4addr per write call.
1160 * Returns number of bytes written or error code, as appropriate
1162 static ssize_t smk_write_net4addr(struct file *file, const char __user *buf,
1163 size_t count, loff_t *ppos)
1165 struct smk_net4addr *snp;
1166 struct sockaddr_in newname;
1168 struct smack_known *skp = NULL;
1170 char *host = (char *)&newname.sin_addr.s_addr;
1172 struct netlbl_audit audit_info;
1173 struct in_addr mask;
1177 u32 mask_bits = (1<<31);
1182 * Must have privilege.
1183 * No partial writes.
1184 * Enough data must be present.
1185 * "<addr/mask, as a.b.c.d/e><space><label>"
1186 * "<addr, as a.b.c.d><space><label>"
1188 if (!smack_privileged(CAP_MAC_ADMIN))
1192 if (count < SMK_NETLBLADDRMIN || count > PAGE_SIZE - 1)
1195 data = memdup_user_nul(buf, count);
1197 return PTR_ERR(data);
1199 smack = kzalloc(count + 1, GFP_KERNEL);
1200 if (smack == NULL) {
1205 rc = sscanf(data, "%hhd.%hhd.%hhd.%hhd/%u %s",
1206 &host[0], &host[1], &host[2], &host[3], &masks, smack);
1208 rc = sscanf(data, "%hhd.%hhd.%hhd.%hhd %s",
1209 &host[0], &host[1], &host[2], &host[3], smack);
1217 if (masks > BEBITS) {
1223 * If smack begins with '-', it is an option, don't import it
1225 if (smack[0] != '-') {
1226 skp = smk_import_entry(smack, 0);
1233 * Only the -CIPSO option is supported for IPv4
1235 if (strcmp(smack, SMACK_CIPSO_OPTION) != 0) {
1241 for (m = masks, temp_mask = 0; m > 0; m--) {
1242 temp_mask |= mask_bits;
1245 mask.s_addr = cpu_to_be32(temp_mask);
1247 newname.sin_addr.s_addr &= mask.s_addr;
1249 * Only allow one writer at a time. Writes should be
1250 * quite rare and small in any case.
1252 mutex_lock(&smk_net4addr_lock);
1254 nsa = newname.sin_addr.s_addr;
1255 /* try to find if the prefix is already in the list */
1257 list_for_each_entry_rcu(snp, &smk_net4addr_list, list) {
1258 if (snp->smk_host.s_addr == nsa && snp->smk_masks == masks) {
1263 smk_netlabel_audit_set(&audit_info);
1266 snp = kzalloc(sizeof(*snp), GFP_KERNEL);
1271 snp->smk_host.s_addr = newname.sin_addr.s_addr;
1272 snp->smk_mask.s_addr = mask.s_addr;
1273 snp->smk_label = skp;
1274 snp->smk_masks = masks;
1275 smk_net4addr_insert(snp);
1279 * Delete the unlabeled entry, only if the previous label
1280 * wasn't the special CIPSO option
1282 if (snp->smk_label != NULL)
1283 rc = netlbl_cfg_unlbl_static_del(&init_net, NULL,
1284 &snp->smk_host, &snp->smk_mask,
1285 PF_INET, &audit_info);
1288 snp->smk_label = skp;
1292 * Now tell netlabel about the single label nature of
1293 * this host so that incoming packets get labeled.
1294 * but only if we didn't get the special CIPSO option
1296 if (rc == 0 && skp != NULL)
1297 rc = netlbl_cfg_unlbl_static_add(&init_net, NULL,
1298 &snp->smk_host, &snp->smk_mask, PF_INET,
1299 snp->smk_label->smk_secid, &audit_info);
1304 mutex_unlock(&smk_net4addr_lock);
1314 static const struct file_operations smk_net4addr_ops = {
1315 .open = smk_open_net4addr,
1317 .llseek = seq_lseek,
1318 .write = smk_write_net4addr,
1319 .release = seq_release,
1322 #if IS_ENABLED(CONFIG_IPV6)
1324 * Seq_file read operations for /smack/netlabel6
1327 static void *net6addr_seq_start(struct seq_file *s, loff_t *pos)
1329 return smk_seq_start(s, pos, &smk_net6addr_list);
1332 static void *net6addr_seq_next(struct seq_file *s, void *v, loff_t *pos)
1334 return smk_seq_next(s, v, pos, &smk_net6addr_list);
1338 * Print host/label pairs
1340 static int net6addr_seq_show(struct seq_file *s, void *v)
1342 struct list_head *list = v;
1343 struct smk_net6addr *skp =
1344 list_entry(list, struct smk_net6addr, list);
1346 if (skp->smk_label != NULL)
1347 seq_printf(s, "%pI6/%d %s\n", &skp->smk_host, skp->smk_masks,
1348 skp->smk_label->smk_known);
1353 static const struct seq_operations net6addr_seq_ops = {
1354 .start = net6addr_seq_start,
1355 .next = net6addr_seq_next,
1356 .show = net6addr_seq_show,
1357 .stop = smk_seq_stop,
1361 * smk_open_net6addr - open() for /smack/netlabel
1362 * @inode: inode structure representing file
1363 * @file: "netlabel" file pointer
1365 * Connect our net6addr_seq_* operations with /smack/netlabel
1368 static int smk_open_net6addr(struct inode *inode, struct file *file)
1370 return seq_open(file, &net6addr_seq_ops);
1374 * smk_net6addr_insert
1375 * @new : entry to insert
1377 * This inserts an entry in the smack_net6addrs list
1378 * sorted by netmask length (longest to smallest)
1379 * locked by &smk_net6addr_lock in smk_write_net6addr
1382 static void smk_net6addr_insert(struct smk_net6addr *new)
1384 struct smk_net6addr *m_next;
1385 struct smk_net6addr *m;
1387 if (list_empty(&smk_net6addr_list)) {
1388 list_add_rcu(&new->list, &smk_net6addr_list);
1392 m = list_entry_rcu(smk_net6addr_list.next,
1393 struct smk_net6addr, list);
1395 if (new->smk_masks > m->smk_masks) {
1396 list_add_rcu(&new->list, &smk_net6addr_list);
1400 list_for_each_entry_rcu(m, &smk_net6addr_list, list) {
1401 if (list_is_last(&m->list, &smk_net6addr_list)) {
1402 list_add_rcu(&new->list, &m->list);
1405 m_next = list_entry_rcu(m->list.next,
1406 struct smk_net6addr, list);
1407 if (new->smk_masks > m_next->smk_masks) {
1408 list_add_rcu(&new->list, &m->list);
1416 * smk_write_net6addr - write() for /smack/netlabel
1417 * @file: file pointer, not actually used
1418 * @buf: where to get the data from
1419 * @count: bytes sent
1420 * @ppos: where to start
1422 * Accepts only one net6addr per write call.
1423 * Returns number of bytes written or error code, as appropriate
1425 static ssize_t smk_write_net6addr(struct file *file, const char __user *buf,
1426 size_t count, loff_t *ppos)
1428 struct smk_net6addr *snp;
1429 struct in6_addr newname;
1430 struct in6_addr fullmask;
1431 struct smack_known *skp = NULL;
1437 unsigned int scanned[8];
1439 unsigned int mask = 128;
1442 * Must have privilege.
1443 * No partial writes.
1444 * Enough data must be present.
1445 * "<addr/mask, as a:b:c:d:e:f:g:h/e><space><label>"
1446 * "<addr, as a:b:c:d:e:f:g:h><space><label>"
1448 if (!smack_privileged(CAP_MAC_ADMIN))
1452 if (count < SMK_NETLBLADDRMIN || count > PAGE_SIZE - 1)
1455 data = memdup_user_nul(buf, count);
1457 return PTR_ERR(data);
1459 smack = kzalloc(count + 1, GFP_KERNEL);
1460 if (smack == NULL) {
1465 i = sscanf(data, "%x:%x:%x:%x:%x:%x:%x:%x/%u %s",
1466 &scanned[0], &scanned[1], &scanned[2], &scanned[3],
1467 &scanned[4], &scanned[5], &scanned[6], &scanned[7],
1470 i = sscanf(data, "%x:%x:%x:%x:%x:%x:%x:%x %s",
1471 &scanned[0], &scanned[1], &scanned[2],
1472 &scanned[3], &scanned[4], &scanned[5],
1473 &scanned[6], &scanned[7], smack);
1483 for (i = 0; i < 8; i++) {
1484 if (scanned[i] > 0xffff) {
1488 newname.s6_addr16[i] = htons(scanned[i]);
1492 * If smack begins with '-', it is an option, don't import it
1494 if (smack[0] != '-') {
1495 skp = smk_import_entry(smack, 0);
1502 * Only -DELETE is supported for IPv6
1504 if (strcmp(smack, SMACK_DELETE_OPTION) != 0) {
1510 for (i = 0, m = mask; i < 8; i++) {
1512 fullmask.s6_addr16[i] = 0xffff;
1515 fullmask.s6_addr16[i] = (1 << m) - 1;
1518 fullmask.s6_addr16[i] = 0;
1519 newname.s6_addr16[i] &= fullmask.s6_addr16[i];
1523 * Only allow one writer at a time. Writes should be
1524 * quite rare and small in any case.
1526 mutex_lock(&smk_net6addr_lock);
1528 * Try to find the prefix in the list
1530 list_for_each_entry_rcu(snp, &smk_net6addr_list, list) {
1531 if (mask != snp->smk_masks)
1533 for (found = 1, i = 0; i < 8; i++) {
1534 if (newname.s6_addr16[i] !=
1535 snp->smk_host.s6_addr16[i]) {
1544 snp = kzalloc(sizeof(*snp), GFP_KERNEL);
1548 snp->smk_host = newname;
1549 snp->smk_mask = fullmask;
1550 snp->smk_masks = mask;
1551 snp->smk_label = skp;
1552 smk_net6addr_insert(snp);
1555 snp->smk_label = skp;
1561 mutex_unlock(&smk_net6addr_lock);
1571 static const struct file_operations smk_net6addr_ops = {
1572 .open = smk_open_net6addr,
1574 .llseek = seq_lseek,
1575 .write = smk_write_net6addr,
1576 .release = seq_release,
1578 #endif /* CONFIG_IPV6 */
1581 * smk_read_doi - read() for /smack/doi
1582 * @filp: file pointer, not actually used
1583 * @buf: where to put the result
1584 * @count: maximum to send along
1585 * @ppos: where to start
1587 * Returns number of bytes read or error code, as appropriate
1589 static ssize_t smk_read_doi(struct file *filp, char __user *buf,
1590 size_t count, loff_t *ppos)
1598 sprintf(temp, "%d", smk_cipso_doi_value);
1599 rc = simple_read_from_buffer(buf, count, ppos, temp, strlen(temp));
1605 * smk_write_doi - write() for /smack/doi
1606 * @file: file pointer, not actually used
1607 * @buf: where to get the data from
1608 * @count: bytes sent
1609 * @ppos: where to start
1611 * Returns number of bytes written or error code, as appropriate
1613 static ssize_t smk_write_doi(struct file *file, const char __user *buf,
1614 size_t count, loff_t *ppos)
1619 if (!smack_privileged(CAP_MAC_ADMIN))
1622 if (count >= sizeof(temp) || count == 0)
1625 if (copy_from_user(temp, buf, count) != 0)
1630 if (sscanf(temp, "%d", &i) != 1)
1633 smk_cipso_doi_value = i;
1640 static const struct file_operations smk_doi_ops = {
1641 .read = smk_read_doi,
1642 .write = smk_write_doi,
1643 .llseek = default_llseek,
1647 * smk_read_direct - read() for /smack/direct
1648 * @filp: file pointer, not actually used
1649 * @buf: where to put the result
1650 * @count: maximum to send along
1651 * @ppos: where to start
1653 * Returns number of bytes read or error code, as appropriate
1655 static ssize_t smk_read_direct(struct file *filp, char __user *buf,
1656 size_t count, loff_t *ppos)
1664 sprintf(temp, "%d", smack_cipso_direct);
1665 rc = simple_read_from_buffer(buf, count, ppos, temp, strlen(temp));
1671 * smk_write_direct - write() for /smack/direct
1672 * @file: file pointer, not actually used
1673 * @buf: where to get the data from
1674 * @count: bytes sent
1675 * @ppos: where to start
1677 * Returns number of bytes written or error code, as appropriate
1679 static ssize_t smk_write_direct(struct file *file, const char __user *buf,
1680 size_t count, loff_t *ppos)
1682 struct smack_known *skp;
1686 if (!smack_privileged(CAP_MAC_ADMIN))
1689 if (count >= sizeof(temp) || count == 0)
1692 if (copy_from_user(temp, buf, count) != 0)
1697 if (sscanf(temp, "%d", &i) != 1)
1701 * Don't do anything if the value hasn't actually changed.
1702 * If it is changing reset the level on entries that were
1703 * set up to be direct when they were created.
1705 if (smack_cipso_direct != i) {
1706 mutex_lock(&smack_known_lock);
1707 list_for_each_entry_rcu(skp, &smack_known_list, list)
1708 if (skp->smk_netlabel.attr.mls.lvl ==
1710 skp->smk_netlabel.attr.mls.lvl = i;
1711 smack_cipso_direct = i;
1712 mutex_unlock(&smack_known_lock);
1718 static const struct file_operations smk_direct_ops = {
1719 .read = smk_read_direct,
1720 .write = smk_write_direct,
1721 .llseek = default_llseek,
1725 * smk_read_mapped - read() for /smack/mapped
1726 * @filp: file pointer, not actually used
1727 * @buf: where to put the result
1728 * @count: maximum to send along
1729 * @ppos: where to start
1731 * Returns number of bytes read or error code, as appropriate
1733 static ssize_t smk_read_mapped(struct file *filp, char __user *buf,
1734 size_t count, loff_t *ppos)
1742 sprintf(temp, "%d", smack_cipso_mapped);
1743 rc = simple_read_from_buffer(buf, count, ppos, temp, strlen(temp));
1749 * smk_write_mapped - write() for /smack/mapped
1750 * @file: file pointer, not actually used
1751 * @buf: where to get the data from
1752 * @count: bytes sent
1753 * @ppos: where to start
1755 * Returns number of bytes written or error code, as appropriate
1757 static ssize_t smk_write_mapped(struct file *file, const char __user *buf,
1758 size_t count, loff_t *ppos)
1760 struct smack_known *skp;
1764 if (!smack_privileged(CAP_MAC_ADMIN))
1767 if (count >= sizeof(temp) || count == 0)
1770 if (copy_from_user(temp, buf, count) != 0)
1775 if (sscanf(temp, "%d", &i) != 1)
1779 * Don't do anything if the value hasn't actually changed.
1780 * If it is changing reset the level on entries that were
1781 * set up to be mapped when they were created.
1783 if (smack_cipso_mapped != i) {
1784 mutex_lock(&smack_known_lock);
1785 list_for_each_entry_rcu(skp, &smack_known_list, list)
1786 if (skp->smk_netlabel.attr.mls.lvl ==
1788 skp->smk_netlabel.attr.mls.lvl = i;
1789 smack_cipso_mapped = i;
1790 mutex_unlock(&smack_known_lock);
1796 static const struct file_operations smk_mapped_ops = {
1797 .read = smk_read_mapped,
1798 .write = smk_write_mapped,
1799 .llseek = default_llseek,
1803 * smk_read_ambient - read() for /smack/ambient
1804 * @filp: file pointer, not actually used
1805 * @buf: where to put the result
1806 * @cn: maximum to send along
1807 * @ppos: where to start
1809 * Returns number of bytes read or error code, as appropriate
1811 static ssize_t smk_read_ambient(struct file *filp, char __user *buf,
1812 size_t cn, loff_t *ppos)
1820 * Being careful to avoid a problem in the case where
1821 * smack_net_ambient gets changed in midstream.
1823 mutex_lock(&smack_ambient_lock);
1825 asize = strlen(smack_net_ambient->smk_known) + 1;
1828 rc = simple_read_from_buffer(buf, cn, ppos,
1829 smack_net_ambient->smk_known,
1834 mutex_unlock(&smack_ambient_lock);
1840 * smk_write_ambient - write() for /smack/ambient
1841 * @file: file pointer, not actually used
1842 * @buf: where to get the data from
1843 * @count: bytes sent
1844 * @ppos: where to start
1846 * Returns number of bytes written or error code, as appropriate
1848 static ssize_t smk_write_ambient(struct file *file, const char __user *buf,
1849 size_t count, loff_t *ppos)
1851 struct smack_known *skp;
1856 if (!smack_privileged(CAP_MAC_ADMIN))
1859 /* Enough data must be present */
1860 if (count == 0 || count > PAGE_SIZE)
1863 data = memdup_user_nul(buf, count);
1865 return PTR_ERR(data);
1867 skp = smk_import_entry(data, count);
1873 mutex_lock(&smack_ambient_lock);
1875 oldambient = smack_net_ambient->smk_known;
1876 smack_net_ambient = skp;
1877 smk_unlbl_ambient(oldambient);
1879 mutex_unlock(&smack_ambient_lock);
1886 static const struct file_operations smk_ambient_ops = {
1887 .read = smk_read_ambient,
1888 .write = smk_write_ambient,
1889 .llseek = default_llseek,
1893 * Seq_file operations for /smack/onlycap
1895 static void *onlycap_seq_start(struct seq_file *s, loff_t *pos)
1897 return smk_seq_start(s, pos, &smack_onlycap_list);
1900 static void *onlycap_seq_next(struct seq_file *s, void *v, loff_t *pos)
1902 return smk_seq_next(s, v, pos, &smack_onlycap_list);
1905 static int onlycap_seq_show(struct seq_file *s, void *v)
1907 struct list_head *list = v;
1908 struct smack_known_list_elem *sklep =
1909 list_entry_rcu(list, struct smack_known_list_elem, list);
1911 seq_puts(s, sklep->smk_label->smk_known);
1917 static const struct seq_operations onlycap_seq_ops = {
1918 .start = onlycap_seq_start,
1919 .next = onlycap_seq_next,
1920 .show = onlycap_seq_show,
1921 .stop = smk_seq_stop,
1924 static int smk_open_onlycap(struct inode *inode, struct file *file)
1926 return seq_open(file, &onlycap_seq_ops);
1930 * smk_list_swap_rcu - swap public list with a private one in RCU-safe way
1931 * The caller must hold appropriate mutex to prevent concurrent modifications
1932 * to the public list.
1933 * Private list is assumed to be not accessible to other threads yet.
1935 * @public: public list
1936 * @private: private list
1938 static void smk_list_swap_rcu(struct list_head *public,
1939 struct list_head *private)
1941 struct list_head *first, *last;
1943 if (list_empty(public)) {
1944 list_splice_init_rcu(private, public, synchronize_rcu);
1946 /* Remember public list before replacing it */
1947 first = public->next;
1948 last = public->prev;
1950 /* Publish private list in place of public in RCU-safe way */
1951 private->prev->next = public;
1952 private->next->prev = public;
1953 rcu_assign_pointer(public->next, private->next);
1954 public->prev = private->prev;
1958 /* When all readers are done with the old public list,
1959 * attach it in place of private */
1960 private->next = first;
1961 private->prev = last;
1962 first->prev = private;
1963 last->next = private;
1968 * smk_parse_label_list - parse list of Smack labels, separated by spaces
1970 * @data: the string to parse
1971 * @private: destination list
1973 * Returns zero on success or error code, as appropriate
1975 static int smk_parse_label_list(char *data, struct list_head *list)
1978 struct smack_known *skp;
1979 struct smack_known_list_elem *sklep;
1981 while ((tok = strsep(&data, " ")) != NULL) {
1985 skp = smk_import_entry(tok, 0);
1987 return PTR_ERR(skp);
1989 sklep = kzalloc(sizeof(*sklep), GFP_KERNEL);
1993 sklep->smk_label = skp;
1994 list_add(&sklep->list, list);
2001 * smk_destroy_label_list - destroy a list of smack_known_list_elem
2002 * @head: header pointer of the list to destroy
2004 void smk_destroy_label_list(struct list_head *list)
2006 struct smack_known_list_elem *sklep;
2007 struct smack_known_list_elem *sklep2;
2009 list_for_each_entry_safe(sklep, sklep2, list, list)
2012 INIT_LIST_HEAD(list);
2016 * smk_write_onlycap - write() for smackfs/onlycap
2017 * @file: file pointer, not actually used
2018 * @buf: where to get the data from
2019 * @count: bytes sent
2020 * @ppos: where to start
2022 * Returns number of bytes written or error code, as appropriate
2024 static ssize_t smk_write_onlycap(struct file *file, const char __user *buf,
2025 size_t count, loff_t *ppos)
2028 LIST_HEAD(list_tmp);
2031 if (!smack_privileged(CAP_MAC_ADMIN))
2034 if (count > PAGE_SIZE)
2037 data = memdup_user_nul(buf, count);
2039 return PTR_ERR(data);
2041 rc = smk_parse_label_list(data, &list_tmp);
2045 * Clear the smack_onlycap on invalid label errors. This means
2046 * that we can pass a null string to unset the onlycap value.
2048 * Importing will also reject a label beginning with '-',
2049 * so "-usecapabilities" will also work.
2051 * But do so only on invalid label, not on system errors.
2052 * The invalid label must be first to count as clearing attempt.
2054 if (!rc || (rc == -EINVAL && list_empty(&list_tmp))) {
2055 mutex_lock(&smack_onlycap_lock);
2056 smk_list_swap_rcu(&smack_onlycap_list, &list_tmp);
2057 mutex_unlock(&smack_onlycap_lock);
2061 smk_destroy_label_list(&list_tmp);
2066 static const struct file_operations smk_onlycap_ops = {
2067 .open = smk_open_onlycap,
2069 .write = smk_write_onlycap,
2070 .llseek = seq_lseek,
2071 .release = seq_release,
2074 #ifdef CONFIG_SECURITY_SMACK_BRINGUP
2076 * smk_read_unconfined - read() for smackfs/unconfined
2077 * @filp: file pointer, not actually used
2078 * @buf: where to put the result
2079 * @cn: maximum to send along
2080 * @ppos: where to start
2082 * Returns number of bytes read or error code, as appropriate
2084 static ssize_t smk_read_unconfined(struct file *filp, char __user *buf,
2085 size_t cn, loff_t *ppos)
2088 ssize_t rc = -EINVAL;
2094 if (smack_unconfined != NULL)
2095 smack = smack_unconfined->smk_known;
2097 asize = strlen(smack) + 1;
2100 rc = simple_read_from_buffer(buf, cn, ppos, smack, asize);
2106 * smk_write_unconfined - write() for smackfs/unconfined
2107 * @file: file pointer, not actually used
2108 * @buf: where to get the data from
2109 * @count: bytes sent
2110 * @ppos: where to start
2112 * Returns number of bytes written or error code, as appropriate
2114 static ssize_t smk_write_unconfined(struct file *file, const char __user *buf,
2115 size_t count, loff_t *ppos)
2118 struct smack_known *skp;
2121 if (!smack_privileged(CAP_MAC_ADMIN))
2124 if (count > PAGE_SIZE)
2127 data = memdup_user_nul(buf, count);
2129 return PTR_ERR(data);
2132 * Clear the smack_unconfined on invalid label errors. This means
2133 * that we can pass a null string to unset the unconfined value.
2135 * Importing will also reject a label beginning with '-',
2136 * so "-confine" will also work.
2138 * But do so only on invalid label, not on system errors.
2140 skp = smk_import_entry(data, count);
2141 if (PTR_ERR(skp) == -EINVAL)
2143 else if (IS_ERR(skp)) {
2148 smack_unconfined = skp;
2155 static const struct file_operations smk_unconfined_ops = {
2156 .read = smk_read_unconfined,
2157 .write = smk_write_unconfined,
2158 .llseek = default_llseek,
2160 #endif /* CONFIG_SECURITY_SMACK_BRINGUP */
2163 * smk_read_logging - read() for /smack/logging
2164 * @filp: file pointer, not actually used
2165 * @buf: where to put the result
2166 * @cn: maximum to send along
2167 * @ppos: where to start
2169 * Returns number of bytes read or error code, as appropriate
2171 static ssize_t smk_read_logging(struct file *filp, char __user *buf,
2172 size_t count, loff_t *ppos)
2180 sprintf(temp, "%d\n", log_policy);
2181 rc = simple_read_from_buffer(buf, count, ppos, temp, strlen(temp));
2186 * smk_write_logging - write() for /smack/logging
2187 * @file: file pointer, not actually used
2188 * @buf: where to get the data from
2189 * @count: bytes sent
2190 * @ppos: where to start
2192 * Returns number of bytes written or error code, as appropriate
2194 static ssize_t smk_write_logging(struct file *file, const char __user *buf,
2195 size_t count, loff_t *ppos)
2200 if (!smack_privileged(CAP_MAC_ADMIN))
2203 if (count >= sizeof(temp) || count == 0)
2206 if (copy_from_user(temp, buf, count) != 0)
2211 if (sscanf(temp, "%d", &i) != 1)
2221 static const struct file_operations smk_logging_ops = {
2222 .read = smk_read_logging,
2223 .write = smk_write_logging,
2224 .llseek = default_llseek,
2228 * Seq_file read operations for /smack/load-self
2231 static void *load_self_seq_start(struct seq_file *s, loff_t *pos)
2233 struct task_smack *tsp = current_security();
2235 return smk_seq_start(s, pos, &tsp->smk_rules);
2238 static void *load_self_seq_next(struct seq_file *s, void *v, loff_t *pos)
2240 struct task_smack *tsp = current_security();
2242 return smk_seq_next(s, v, pos, &tsp->smk_rules);
2245 static int load_self_seq_show(struct seq_file *s, void *v)
2247 struct list_head *list = v;
2248 struct smack_rule *srp =
2249 list_entry_rcu(list, struct smack_rule, list);
2251 smk_rule_show(s, srp, SMK_LABELLEN);
2256 static const struct seq_operations load_self_seq_ops = {
2257 .start = load_self_seq_start,
2258 .next = load_self_seq_next,
2259 .show = load_self_seq_show,
2260 .stop = smk_seq_stop,
2265 * smk_open_load_self - open() for /smack/load-self2
2266 * @inode: inode structure representing file
2267 * @file: "load" file pointer
2269 * For reading, use load_seq_* seq_file reading operations.
2271 static int smk_open_load_self(struct inode *inode, struct file *file)
2273 return seq_open(file, &load_self_seq_ops);
2277 * smk_write_load_self - write() for /smack/load-self
2278 * @file: file pointer, not actually used
2279 * @buf: where to get the data from
2280 * @count: bytes sent
2281 * @ppos: where to start - must be 0
2284 static ssize_t smk_write_load_self(struct file *file, const char __user *buf,
2285 size_t count, loff_t *ppos)
2287 struct task_smack *tsp = current_security();
2289 return smk_write_rules_list(file, buf, count, ppos, &tsp->smk_rules,
2290 &tsp->smk_rules_lock, SMK_FIXED24_FMT);
2293 static const struct file_operations smk_load_self_ops = {
2294 .open = smk_open_load_self,
2296 .llseek = seq_lseek,
2297 .write = smk_write_load_self,
2298 .release = seq_release,
2302 * smk_user_access - handle access check transaction
2303 * @file: file pointer
2304 * @buf: data from user space
2305 * @count: bytes sent
2306 * @ppos: where to start - must be 0
2308 static ssize_t smk_user_access(struct file *file, const char __user *buf,
2309 size_t count, loff_t *ppos, int format)
2311 struct smack_parsed_rule rule;
2315 data = simple_transaction_get(file, buf, count);
2317 return PTR_ERR(data);
2319 if (format == SMK_FIXED24_FMT) {
2320 if (count < SMK_LOADLEN)
2322 res = smk_parse_rule(data, &rule, 0);
2325 * simple_transaction_get() returns null-terminated data
2327 res = smk_parse_long_rule(data, &rule, 0, 3);
2331 res = smk_access(rule.smk_subject, rule.smk_object,
2332 rule.smk_access1, NULL);
2333 else if (res != -ENOENT)
2337 * smk_access() can return a value > 0 in the "bringup" case.
2339 data[0] = res >= 0 ? '1' : '0';
2342 simple_transaction_set(file, 2);
2344 if (format == SMK_FIXED24_FMT)
2350 * smk_write_access - handle access check transaction
2351 * @file: file pointer
2352 * @buf: data from user space
2353 * @count: bytes sent
2354 * @ppos: where to start - must be 0
2356 static ssize_t smk_write_access(struct file *file, const char __user *buf,
2357 size_t count, loff_t *ppos)
2359 return smk_user_access(file, buf, count, ppos, SMK_FIXED24_FMT);
2362 static const struct file_operations smk_access_ops = {
2363 .write = smk_write_access,
2364 .read = simple_transaction_read,
2365 .release = simple_transaction_release,
2366 .llseek = generic_file_llseek,
2371 * Seq_file read operations for /smack/load2
2374 static int load2_seq_show(struct seq_file *s, void *v)
2376 struct list_head *list = v;
2377 struct smack_master_list *smlp =
2378 list_entry_rcu(list, struct smack_master_list, list);
2380 smk_rule_show(s, smlp->smk_rule, SMK_LONGLABEL);
2385 static const struct seq_operations load2_seq_ops = {
2386 .start = load2_seq_start,
2387 .next = load2_seq_next,
2388 .show = load2_seq_show,
2389 .stop = smk_seq_stop,
2393 * smk_open_load2 - open() for /smack/load2
2394 * @inode: inode structure representing file
2395 * @file: "load2" file pointer
2397 * For reading, use load2_seq_* seq_file reading operations.
2399 static int smk_open_load2(struct inode *inode, struct file *file)
2401 return seq_open(file, &load2_seq_ops);
2405 * smk_write_load2 - write() for /smack/load2
2406 * @file: file pointer, not actually used
2407 * @buf: where to get the data from
2408 * @count: bytes sent
2409 * @ppos: where to start - must be 0
2412 static ssize_t smk_write_load2(struct file *file, const char __user *buf,
2413 size_t count, loff_t *ppos)
2416 * Must have privilege.
2418 if (!smack_privileged(CAP_MAC_ADMIN))
2421 return smk_write_rules_list(file, buf, count, ppos, NULL, NULL,
2425 static const struct file_operations smk_load2_ops = {
2426 .open = smk_open_load2,
2428 .llseek = seq_lseek,
2429 .write = smk_write_load2,
2430 .release = seq_release,
2434 * Seq_file read operations for /smack/load-self2
2437 static void *load_self2_seq_start(struct seq_file *s, loff_t *pos)
2439 struct task_smack *tsp = current_security();
2441 return smk_seq_start(s, pos, &tsp->smk_rules);
2444 static void *load_self2_seq_next(struct seq_file *s, void *v, loff_t *pos)
2446 struct task_smack *tsp = current_security();
2448 return smk_seq_next(s, v, pos, &tsp->smk_rules);
2451 static int load_self2_seq_show(struct seq_file *s, void *v)
2453 struct list_head *list = v;
2454 struct smack_rule *srp =
2455 list_entry_rcu(list, struct smack_rule, list);
2457 smk_rule_show(s, srp, SMK_LONGLABEL);
2462 static const struct seq_operations load_self2_seq_ops = {
2463 .start = load_self2_seq_start,
2464 .next = load_self2_seq_next,
2465 .show = load_self2_seq_show,
2466 .stop = smk_seq_stop,
2470 * smk_open_load_self2 - open() for /smack/load-self2
2471 * @inode: inode structure representing file
2472 * @file: "load" file pointer
2474 * For reading, use load_seq_* seq_file reading operations.
2476 static int smk_open_load_self2(struct inode *inode, struct file *file)
2478 return seq_open(file, &load_self2_seq_ops);
2482 * smk_write_load_self2 - write() for /smack/load-self2
2483 * @file: file pointer, not actually used
2484 * @buf: where to get the data from
2485 * @count: bytes sent
2486 * @ppos: where to start - must be 0
2489 static ssize_t smk_write_load_self2(struct file *file, const char __user *buf,
2490 size_t count, loff_t *ppos)
2492 struct task_smack *tsp = current_security();
2494 return smk_write_rules_list(file, buf, count, ppos, &tsp->smk_rules,
2495 &tsp->smk_rules_lock, SMK_LONG_FMT);
2498 static const struct file_operations smk_load_self2_ops = {
2499 .open = smk_open_load_self2,
2501 .llseek = seq_lseek,
2502 .write = smk_write_load_self2,
2503 .release = seq_release,
2507 * smk_write_access2 - handle access check transaction
2508 * @file: file pointer
2509 * @buf: data from user space
2510 * @count: bytes sent
2511 * @ppos: where to start - must be 0
2513 static ssize_t smk_write_access2(struct file *file, const char __user *buf,
2514 size_t count, loff_t *ppos)
2516 return smk_user_access(file, buf, count, ppos, SMK_LONG_FMT);
2519 static const struct file_operations smk_access2_ops = {
2520 .write = smk_write_access2,
2521 .read = simple_transaction_read,
2522 .release = simple_transaction_release,
2523 .llseek = generic_file_llseek,
2527 * smk_write_revoke_subj - write() for /smack/revoke-subject
2528 * @file: file pointer
2529 * @buf: data from user space
2530 * @count: bytes sent
2531 * @ppos: where to start - must be 0
2533 static ssize_t smk_write_revoke_subj(struct file *file, const char __user *buf,
2534 size_t count, loff_t *ppos)
2538 struct smack_known *skp;
2539 struct smack_rule *sp;
2540 struct list_head *rule_list;
2541 struct mutex *rule_lock;
2547 if (!smack_privileged(CAP_MAC_ADMIN))
2550 if (count == 0 || count > SMK_LONGLABEL)
2553 data = memdup_user(buf, count);
2555 return PTR_ERR(data);
2557 cp = smk_parse_smack(data, count);
2563 skp = smk_find_entry(cp);
2567 rule_list = &skp->smk_rules;
2568 rule_lock = &skp->smk_rules_lock;
2570 mutex_lock(rule_lock);
2572 list_for_each_entry_rcu(sp, rule_list, list)
2575 mutex_unlock(rule_lock);
2585 static const struct file_operations smk_revoke_subj_ops = {
2586 .write = smk_write_revoke_subj,
2587 .read = simple_transaction_read,
2588 .release = simple_transaction_release,
2589 .llseek = generic_file_llseek,
2593 * smk_init_sysfs - initialize /sys/fs/smackfs
2596 static int smk_init_sysfs(void)
2598 return sysfs_create_mount_point(fs_kobj, "smackfs");
2602 * smk_write_change_rule - write() for /smack/change-rule
2603 * @file: file pointer
2604 * @buf: data from user space
2605 * @count: bytes sent
2606 * @ppos: where to start - must be 0
2608 static ssize_t smk_write_change_rule(struct file *file, const char __user *buf,
2609 size_t count, loff_t *ppos)
2612 * Must have privilege.
2614 if (!smack_privileged(CAP_MAC_ADMIN))
2617 return smk_write_rules_list(file, buf, count, ppos, NULL, NULL,
2621 static const struct file_operations smk_change_rule_ops = {
2622 .write = smk_write_change_rule,
2623 .read = simple_transaction_read,
2624 .release = simple_transaction_release,
2625 .llseek = generic_file_llseek,
2629 * smk_read_syslog - read() for smackfs/syslog
2630 * @filp: file pointer, not actually used
2631 * @buf: where to put the result
2632 * @cn: maximum to send along
2633 * @ppos: where to start
2635 * Returns number of bytes read or error code, as appropriate
2637 static ssize_t smk_read_syslog(struct file *filp, char __user *buf,
2638 size_t cn, loff_t *ppos)
2640 struct smack_known *skp;
2641 ssize_t rc = -EINVAL;
2647 if (smack_syslog_label == NULL)
2648 skp = &smack_known_star;
2650 skp = smack_syslog_label;
2652 asize = strlen(skp->smk_known) + 1;
2655 rc = simple_read_from_buffer(buf, cn, ppos, skp->smk_known,
2662 * smk_write_syslog - write() for smackfs/syslog
2663 * @file: file pointer, not actually used
2664 * @buf: where to get the data from
2665 * @count: bytes sent
2666 * @ppos: where to start
2668 * Returns number of bytes written or error code, as appropriate
2670 static ssize_t smk_write_syslog(struct file *file, const char __user *buf,
2671 size_t count, loff_t *ppos)
2674 struct smack_known *skp;
2677 if (!smack_privileged(CAP_MAC_ADMIN))
2680 /* Enough data must be present */
2681 if (count == 0 || count > PAGE_SIZE)
2684 data = memdup_user_nul(buf, count);
2686 return PTR_ERR(data);
2688 skp = smk_import_entry(data, count);
2692 smack_syslog_label = skp;
2698 static const struct file_operations smk_syslog_ops = {
2699 .read = smk_read_syslog,
2700 .write = smk_write_syslog,
2701 .llseek = default_llseek,
2705 * Seq_file read operations for /smack/relabel-self
2708 static void *relabel_self_seq_start(struct seq_file *s, loff_t *pos)
2710 struct task_smack *tsp = current_security();
2712 return smk_seq_start(s, pos, &tsp->smk_relabel);
2715 static void *relabel_self_seq_next(struct seq_file *s, void *v, loff_t *pos)
2717 struct task_smack *tsp = current_security();
2719 return smk_seq_next(s, v, pos, &tsp->smk_relabel);
2722 static int relabel_self_seq_show(struct seq_file *s, void *v)
2724 struct list_head *list = v;
2725 struct smack_known_list_elem *sklep =
2726 list_entry(list, struct smack_known_list_elem, list);
2728 seq_puts(s, sklep->smk_label->smk_known);
2734 static const struct seq_operations relabel_self_seq_ops = {
2735 .start = relabel_self_seq_start,
2736 .next = relabel_self_seq_next,
2737 .show = relabel_self_seq_show,
2738 .stop = smk_seq_stop,
2742 * smk_open_relabel_self - open() for /smack/relabel-self
2743 * @inode: inode structure representing file
2744 * @file: "relabel-self" file pointer
2746 * Connect our relabel_self_seq_* operations with /smack/relabel-self
2749 static int smk_open_relabel_self(struct inode *inode, struct file *file)
2751 return seq_open(file, &relabel_self_seq_ops);
2755 * smk_write_relabel_self - write() for /smack/relabel-self
2756 * @file: file pointer, not actually used
2757 * @buf: where to get the data from
2758 * @count: bytes sent
2759 * @ppos: where to start - must be 0
2762 static ssize_t smk_write_relabel_self(struct file *file, const char __user *buf,
2763 size_t count, loff_t *ppos)
2767 LIST_HEAD(list_tmp);
2770 * Must have privilege.
2772 if (!smack_privileged(CAP_MAC_ADMIN))
2777 * Enough data must be present.
2781 if (count == 0 || count > PAGE_SIZE)
2784 data = memdup_user_nul(buf, count);
2786 return PTR_ERR(data);
2788 rc = smk_parse_label_list(data, &list_tmp);
2791 if (!rc || (rc == -EINVAL && list_empty(&list_tmp))) {
2793 struct task_smack *tsp;
2795 new = prepare_creds();
2800 tsp = new->security;
2801 smk_destroy_label_list(&tsp->smk_relabel);
2802 list_splice(&list_tmp, &tsp->smk_relabel);
2807 smk_destroy_label_list(&list_tmp);
2811 static const struct file_operations smk_relabel_self_ops = {
2812 .open = smk_open_relabel_self,
2814 .llseek = seq_lseek,
2815 .write = smk_write_relabel_self,
2816 .release = seq_release,
2820 * smk_read_ptrace - read() for /smack/ptrace
2821 * @filp: file pointer, not actually used
2822 * @buf: where to put the result
2823 * @count: maximum to send along
2824 * @ppos: where to start
2826 * Returns number of bytes read or error code, as appropriate
2828 static ssize_t smk_read_ptrace(struct file *filp, char __user *buf,
2829 size_t count, loff_t *ppos)
2837 sprintf(temp, "%d\n", smack_ptrace_rule);
2838 rc = simple_read_from_buffer(buf, count, ppos, temp, strlen(temp));
2843 * smk_write_ptrace - write() for /smack/ptrace
2844 * @file: file pointer
2845 * @buf: data from user space
2846 * @count: bytes sent
2847 * @ppos: where to start - must be 0
2849 static ssize_t smk_write_ptrace(struct file *file, const char __user *buf,
2850 size_t count, loff_t *ppos)
2855 if (!smack_privileged(CAP_MAC_ADMIN))
2858 if (*ppos != 0 || count >= sizeof(temp) || count == 0)
2861 if (copy_from_user(temp, buf, count) != 0)
2866 if (sscanf(temp, "%d", &i) != 1)
2868 if (i < SMACK_PTRACE_DEFAULT || i > SMACK_PTRACE_MAX)
2870 smack_ptrace_rule = i;
2875 static const struct file_operations smk_ptrace_ops = {
2876 .write = smk_write_ptrace,
2877 .read = smk_read_ptrace,
2878 .llseek = default_llseek,
2882 * smk_fill_super - fill the smackfs superblock
2883 * @sb: the empty superblock
2887 * Fill in the well known entries for the smack filesystem
2889 * Returns 0 on success, an error code on failure
2891 static int smk_fill_super(struct super_block *sb, void *data, int silent)
2894 struct inode *root_inode;
2896 static struct tree_descr smack_files[] = {
2898 "load", &smk_load_ops, S_IRUGO|S_IWUSR},
2900 "cipso", &smk_cipso_ops, S_IRUGO|S_IWUSR},
2902 "doi", &smk_doi_ops, S_IRUGO|S_IWUSR},
2904 "direct", &smk_direct_ops, S_IRUGO|S_IWUSR},
2906 "ambient", &smk_ambient_ops, S_IRUGO|S_IWUSR},
2908 "netlabel", &smk_net4addr_ops, S_IRUGO|S_IWUSR},
2910 "onlycap", &smk_onlycap_ops, S_IRUGO|S_IWUSR},
2912 "logging", &smk_logging_ops, S_IRUGO|S_IWUSR},
2914 "load-self", &smk_load_self_ops, S_IRUGO|S_IWUGO},
2916 "access", &smk_access_ops, S_IRUGO|S_IWUGO},
2918 "mapped", &smk_mapped_ops, S_IRUGO|S_IWUSR},
2920 "load2", &smk_load2_ops, S_IRUGO|S_IWUSR},
2921 [SMK_LOAD_SELF2] = {
2922 "load-self2", &smk_load_self2_ops, S_IRUGO|S_IWUGO},
2924 "access2", &smk_access2_ops, S_IRUGO|S_IWUGO},
2926 "cipso2", &smk_cipso2_ops, S_IRUGO|S_IWUSR},
2927 [SMK_REVOKE_SUBJ] = {
2928 "revoke-subject", &smk_revoke_subj_ops,
2930 [SMK_CHANGE_RULE] = {
2931 "change-rule", &smk_change_rule_ops, S_IRUGO|S_IWUSR},
2933 "syslog", &smk_syslog_ops, S_IRUGO|S_IWUSR},
2935 "ptrace", &smk_ptrace_ops, S_IRUGO|S_IWUSR},
2936 #ifdef CONFIG_SECURITY_SMACK_BRINGUP
2937 [SMK_UNCONFINED] = {
2938 "unconfined", &smk_unconfined_ops, S_IRUGO|S_IWUSR},
2940 #if IS_ENABLED(CONFIG_IPV6)
2942 "ipv6host", &smk_net6addr_ops, S_IRUGO|S_IWUSR},
2943 #endif /* CONFIG_IPV6 */
2944 [SMK_RELABEL_SELF] = {
2945 "relabel-self", &smk_relabel_self_ops,
2951 rc = simple_fill_super(sb, SMACK_MAGIC, smack_files);
2953 printk(KERN_ERR "%s failed %d while creating inodes\n",
2958 root_inode = d_inode(sb->s_root);
2964 * smk_mount - get the smackfs superblock
2965 * @fs_type: passed along without comment
2966 * @flags: passed along without comment
2967 * @dev_name: passed along without comment
2968 * @data: passed along without comment
2970 * Just passes everything along.
2972 * Returns what the lower level code does.
2974 static struct dentry *smk_mount(struct file_system_type *fs_type,
2975 int flags, const char *dev_name, void *data)
2977 return mount_single(fs_type, flags, data, smk_fill_super);
2980 static struct file_system_type smk_fs_type = {
2983 .kill_sb = kill_litter_super,
2986 static struct vfsmount *smackfs_mount;
2988 static int __init smk_preset_netlabel(struct smack_known *skp)
2990 skp->smk_netlabel.domain = skp->smk_known;
2991 skp->smk_netlabel.flags =
2992 NETLBL_SECATTR_DOMAIN | NETLBL_SECATTR_MLS_LVL;
2993 return smk_netlbl_mls(smack_cipso_direct, skp->smk_known,
2994 &skp->smk_netlabel, strlen(skp->smk_known));
2998 * init_smk_fs - get the smackfs superblock
3000 * register the smackfs
3002 * Do not register smackfs if Smack wasn't enabled
3003 * on boot. We can not put this method normally under the
3004 * smack_init() code path since the security subsystem get
3005 * initialized before the vfs caches.
3007 * Returns true if we were not chosen on boot or if
3008 * we were chosen and filesystem registration succeeded.
3010 static int __init init_smk_fs(void)
3015 if (smack_enabled == 0)
3018 err = smk_init_sysfs();
3020 printk(KERN_ERR "smackfs: sysfs mountpoint problem.\n");
3022 err = register_filesystem(&smk_fs_type);
3024 smackfs_mount = kern_mount(&smk_fs_type);
3025 if (IS_ERR(smackfs_mount)) {
3026 printk(KERN_ERR "smackfs: could not mount!\n");
3027 err = PTR_ERR(smackfs_mount);
3028 smackfs_mount = NULL;
3033 smk_unlbl_ambient(NULL);
3035 rc = smk_preset_netlabel(&smack_known_floor);
3036 if (err == 0 && rc < 0)
3038 rc = smk_preset_netlabel(&smack_known_hat);
3039 if (err == 0 && rc < 0)
3041 rc = smk_preset_netlabel(&smack_known_huh);
3042 if (err == 0 && rc < 0)
3044 rc = smk_preset_netlabel(&smack_known_invalid);
3045 if (err == 0 && rc < 0)
3047 rc = smk_preset_netlabel(&smack_known_star);
3048 if (err == 0 && rc < 0)
3050 rc = smk_preset_netlabel(&smack_known_web);
3051 if (err == 0 && rc < 0)
3057 __initcall(init_smk_fs);