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_master_list_lock);
71 static DEFINE_MUTEX(smack_cipso_lock);
72 static DEFINE_MUTEX(smack_ambient_lock);
73 static DEFINE_MUTEX(smk_net4addr_lock);
74 #if IS_ENABLED(CONFIG_IPV6)
75 static DEFINE_MUTEX(smk_net6addr_lock);
76 #endif /* CONFIG_IPV6 */
79 * This is the "ambient" label for network traffic.
80 * If it isn't somehow marked, use this.
81 * It can be reset via smackfs/ambient
83 struct smack_known *smack_net_ambient;
86 * This is the level in a CIPSO header that indicates a
87 * smack label is contained directly in the category set.
88 * It can be reset via smackfs/direct
90 int smack_cipso_direct = SMACK_CIPSO_DIRECT_DEFAULT;
93 * This is the level in a CIPSO header that indicates a
94 * secid is contained directly in the category set.
95 * It can be reset via smackfs/mapped
97 int smack_cipso_mapped = SMACK_CIPSO_MAPPED_DEFAULT;
99 #ifdef CONFIG_SECURITY_SMACK_BRINGUP
101 * Allow one label to be unconfined. This is for
102 * debugging and application bring-up purposes only.
103 * It is bad and wrong, but everyone seems to expect
106 struct smack_known *smack_unconfined;
110 * If this value is set restrict syslog use to the label specified.
111 * It can be reset via smackfs/syslog
113 struct smack_known *smack_syslog_label;
116 * Ptrace current rule
117 * SMACK_PTRACE_DEFAULT regular smack ptrace rules (/proc based)
118 * SMACK_PTRACE_EXACT labels must match, but can be overriden with
120 * SMACK_PTRACE_DRACONIAN lables must match, CAP_SYS_PTRACE has no effect
122 int smack_ptrace_rule = SMACK_PTRACE_DEFAULT;
125 * Certain IP addresses may be designated as single label hosts.
126 * Packets are sent there unlabeled, but only from tasks that
127 * can write to the specified label.
130 LIST_HEAD(smk_net4addr_list);
131 #if IS_ENABLED(CONFIG_IPV6)
132 LIST_HEAD(smk_net6addr_list);
133 #endif /* CONFIG_IPV6 */
136 * Rule lists are maintained for each label.
137 * This master list is just for reading /smack/load and /smack/load2.
139 struct smack_master_list {
140 struct list_head list;
141 struct smack_rule *smk_rule;
144 static LIST_HEAD(smack_rule_list);
146 struct smack_parsed_rule {
147 struct smack_known *smk_subject;
148 struct smack_known *smk_object;
153 static int smk_cipso_doi_value = SMACK_CIPSO_DOI_DEFAULT;
156 * Values for parsing cipso rules
157 * SMK_DIGITLEN: Length of a digit field in a rule.
158 * SMK_CIPSOMIN: Minimum possible cipso rule length.
159 * SMK_CIPSOMAX: Maximum possible cipso rule length.
161 #define SMK_DIGITLEN 4
162 #define SMK_CIPSOMIN (SMK_LABELLEN + 2 * SMK_DIGITLEN)
163 #define SMK_CIPSOMAX (SMK_CIPSOMIN + SMACK_CIPSO_MAXCATNUM * SMK_DIGITLEN)
166 * Values for parsing MAC rules
167 * SMK_ACCESS: Maximum possible combination of access permissions
168 * SMK_ACCESSLEN: Maximum length for a rule access field
169 * SMK_LOADLEN: Smack rule length
171 #define SMK_OACCESS "rwxa"
172 #define SMK_ACCESS "rwxatl"
173 #define SMK_OACCESSLEN (sizeof(SMK_OACCESS) - 1)
174 #define SMK_ACCESSLEN (sizeof(SMK_ACCESS) - 1)
175 #define SMK_OLOADLEN (SMK_LABELLEN + SMK_LABELLEN + SMK_OACCESSLEN)
176 #define SMK_LOADLEN (SMK_LABELLEN + SMK_LABELLEN + SMK_ACCESSLEN)
179 * Stricly for CIPSO level manipulation.
180 * Set the category bit number in a smack label sized buffer.
182 static inline void smack_catset_bit(unsigned int cat, char *catsetp)
184 if (cat == 0 || cat > (SMK_CIPSOLEN * 8))
187 catsetp[(cat - 1) / 8] |= 0x80 >> ((cat - 1) % 8);
191 * smk_netlabel_audit_set - fill a netlbl_audit struct
192 * @nap: structure to fill
194 static void smk_netlabel_audit_set(struct netlbl_audit *nap)
196 struct smack_known *skp = smk_of_current();
198 nap->loginuid = audit_get_loginuid(current);
199 nap->sessionid = audit_get_sessionid(current);
200 nap->secid = skp->smk_secid;
204 * Value for parsing single label host rules
207 #define SMK_NETLBLADDRMIN 9
210 * smk_set_access - add a rule to the rule list or replace an old rule
211 * @srp: the rule to add or replace
212 * @rule_list: the list of rules
213 * @rule_lock: the rule list lock
214 * @global: if non-zero, indicates a global rule
216 * Looks through the current subject/object/access list for
217 * the subject/object pair and replaces the access that was
218 * there. If the pair isn't found add it with the specified
221 * Returns 0 if nothing goes wrong or -ENOMEM if it fails
222 * during the allocation of the new pair to add.
224 static int smk_set_access(struct smack_parsed_rule *srp,
225 struct list_head *rule_list,
226 struct mutex *rule_lock, int global)
228 struct smack_rule *sp;
229 struct smack_master_list *smlp;
233 mutex_lock(rule_lock);
236 * Because the object label is less likely to match
237 * than the subject label check it first
239 list_for_each_entry_rcu(sp, rule_list, list) {
240 if (sp->smk_object == srp->smk_object &&
241 sp->smk_subject == srp->smk_subject) {
243 sp->smk_access |= srp->smk_access1;
244 sp->smk_access &= ~srp->smk_access2;
250 sp = kzalloc(sizeof(*sp), GFP_KERNEL);
256 sp->smk_subject = srp->smk_subject;
257 sp->smk_object = srp->smk_object;
258 sp->smk_access = srp->smk_access1 & ~srp->smk_access2;
260 list_add_rcu(&sp->list, rule_list);
262 * If this is a global as opposed to self and a new rule
263 * it needs to get added for reporting.
266 mutex_unlock(rule_lock);
267 smlp = kzalloc(sizeof(*smlp), GFP_KERNEL);
270 mutex_lock(&smack_master_list_lock);
271 list_add_rcu(&smlp->list, &smack_rule_list);
272 mutex_unlock(&smack_master_list_lock);
280 mutex_unlock(rule_lock);
285 * smk_perm_from_str - parse smack accesses from a text string
286 * @string: a text string that contains a Smack accesses code
288 * Returns an integer with respective bits set for specified accesses.
290 static int smk_perm_from_str(const char *string)
295 for (cp = string; ; cp++)
317 perm |= MAY_TRANSMUTE;
333 * smk_fill_rule - Fill Smack rule from strings
334 * @subject: subject label string
335 * @object: object label string
336 * @access1: access string
337 * @access2: string with permissions to be removed
339 * @import: if non-zero, import labels
340 * @len: label length limit
342 * Returns 0 on success, appropriate error code on failure.
344 static int smk_fill_rule(const char *subject, const char *object,
345 const char *access1, const char *access2,
346 struct smack_parsed_rule *rule, int import,
350 struct smack_known *skp;
353 rule->smk_subject = smk_import_entry(subject, len);
354 if (IS_ERR(rule->smk_subject))
355 return PTR_ERR(rule->smk_subject);
357 rule->smk_object = smk_import_entry(object, len);
358 if (IS_ERR(rule->smk_object))
359 return PTR_ERR(rule->smk_object);
361 cp = smk_parse_smack(subject, len);
364 skp = smk_find_entry(cp);
368 rule->smk_subject = skp;
370 cp = smk_parse_smack(object, len);
373 skp = smk_find_entry(cp);
377 rule->smk_object = skp;
380 rule->smk_access1 = smk_perm_from_str(access1);
382 rule->smk_access2 = smk_perm_from_str(access2);
384 rule->smk_access2 = ~rule->smk_access1;
390 * smk_parse_rule - parse Smack rule from load string
391 * @data: string to be parsed whose size is SMK_LOADLEN
393 * @import: if non-zero, import labels
395 * Returns 0 on success, -1 on errors.
397 static int smk_parse_rule(const char *data, struct smack_parsed_rule *rule,
402 rc = smk_fill_rule(data, data + SMK_LABELLEN,
403 data + SMK_LABELLEN + SMK_LABELLEN, NULL, rule,
404 import, SMK_LABELLEN);
409 * smk_parse_long_rule - parse Smack rule from rule string
410 * @data: string to be parsed, null terminated
411 * @rule: Will be filled with Smack parsed rule
412 * @import: if non-zero, import labels
413 * @tokens: numer of substrings expected in data
415 * Returns number of processed bytes on success, -ERRNO on failure.
417 static ssize_t smk_parse_long_rule(char *data, struct smack_parsed_rule *rule,
418 int import, int tokens)
426 * Parsing the rule in-place, filling all white-spaces with '\0'
428 for (i = 0; i < tokens; ++i) {
429 while (isspace(data[cnt]))
432 if (data[cnt] == '\0')
433 /* Unexpected end of data */
438 while (data[cnt] && !isspace(data[cnt]))
441 while (isspace(data[cnt]))
447 rc = smk_fill_rule(tok[0], tok[1], tok[2], tok[3], rule, import, 0);
448 return rc == 0 ? cnt : rc;
451 #define SMK_FIXED24_FMT 0 /* Fixed 24byte label format */
452 #define SMK_LONG_FMT 1 /* Variable long label format */
453 #define SMK_CHANGE_FMT 2 /* Rule modification format */
455 * smk_write_rules_list - write() for any /smack rule file
456 * @file: file pointer, not actually used
457 * @buf: where to get the data from
459 * @ppos: where to start - must be 0
460 * @rule_list: the list of rules to write to
461 * @rule_lock: lock for the rule list
462 * @format: /smack/load or /smack/load2 or /smack/change-rule format.
464 * Get one smack access rule from above.
465 * The format for SMK_LONG_FMT is:
466 * "subject<whitespace>object<whitespace>access[<whitespace>...]"
467 * The format for SMK_FIXED24_FMT is exactly:
468 * "subject object rwxat"
469 * The format for SMK_CHANGE_FMT is:
470 * "subject<whitespace>object<whitespace>
471 * acc_enable<whitespace>acc_disable[<whitespace>...]"
473 static ssize_t smk_write_rules_list(struct file *file, const char __user *buf,
474 size_t count, loff_t *ppos,
475 struct list_head *rule_list,
476 struct mutex *rule_lock, int format)
478 struct smack_parsed_rule rule;
487 * Enough data must be present.
492 if (format == SMK_FIXED24_FMT) {
494 * Minor hack for backward compatibility
496 if (count < SMK_OLOADLEN || count > SMK_LOADLEN)
499 if (count >= PAGE_SIZE) {
500 count = PAGE_SIZE - 1;
505 data = memdup_user_nul(buf, count);
507 return PTR_ERR(data);
510 * In case of parsing only part of user buf,
511 * avoid having partial rule at the data buffer
514 while (count > 0 && (data[count - 1] != '\n'))
523 tokens = (format == SMK_CHANGE_FMT ? 4 : 3);
524 while (cnt < count) {
525 if (format == SMK_FIXED24_FMT) {
526 rc = smk_parse_rule(data, &rule, 1);
531 rc = smk_parse_long_rule(data + cnt, &rule, 1, tokens);
541 if (rule_list == NULL)
542 rc = smk_set_access(&rule, &rule.smk_subject->smk_rules,
543 &rule.smk_subject->smk_rules_lock, 1);
545 rc = smk_set_access(&rule, rule_list, rule_lock, 0);
558 * Core logic for smackfs seq list operations.
561 static void *smk_seq_start(struct seq_file *s, loff_t *pos,
562 struct list_head *head)
564 struct list_head *list;
568 for (list = rcu_dereference(list_next_rcu(head));
570 list = rcu_dereference(list_next_rcu(list))) {
578 static void *smk_seq_next(struct seq_file *s, void *v, loff_t *pos,
579 struct list_head *head)
581 struct list_head *list = v;
584 list = rcu_dereference(list_next_rcu(list));
586 return (list == head) ? NULL : list;
589 static void smk_seq_stop(struct seq_file *s, void *v)
594 static void smk_rule_show(struct seq_file *s, struct smack_rule *srp, int max)
597 * Don't show any rules with label names too long for
598 * interface file (/smack/load or /smack/load2)
599 * because you should expect to be able to write
600 * anything you read back.
602 if (strlen(srp->smk_subject->smk_known) >= max ||
603 strlen(srp->smk_object->smk_known) >= max)
606 if (srp->smk_access == 0)
609 seq_printf(s, "%s %s",
610 srp->smk_subject->smk_known,
611 srp->smk_object->smk_known);
615 if (srp->smk_access & MAY_READ)
617 if (srp->smk_access & MAY_WRITE)
619 if (srp->smk_access & MAY_EXEC)
621 if (srp->smk_access & MAY_APPEND)
623 if (srp->smk_access & MAY_TRANSMUTE)
625 if (srp->smk_access & MAY_LOCK)
627 if (srp->smk_access & MAY_BRINGUP)
634 * Seq_file read operations for /smack/load
637 static void *load2_seq_start(struct seq_file *s, loff_t *pos)
639 return smk_seq_start(s, pos, &smack_rule_list);
642 static void *load2_seq_next(struct seq_file *s, void *v, loff_t *pos)
644 return smk_seq_next(s, v, pos, &smack_rule_list);
647 static int load_seq_show(struct seq_file *s, void *v)
649 struct list_head *list = v;
650 struct smack_master_list *smlp =
651 list_entry_rcu(list, struct smack_master_list, list);
653 smk_rule_show(s, smlp->smk_rule, SMK_LABELLEN);
658 static const struct seq_operations load_seq_ops = {
659 .start = load2_seq_start,
660 .next = load2_seq_next,
661 .show = load_seq_show,
662 .stop = smk_seq_stop,
666 * smk_open_load - open() for /smack/load
667 * @inode: inode structure representing file
668 * @file: "load" file pointer
670 * For reading, use load_seq_* seq_file reading operations.
672 static int smk_open_load(struct inode *inode, struct file *file)
674 return seq_open(file, &load_seq_ops);
678 * smk_write_load - write() for /smack/load
679 * @file: file pointer, not actually used
680 * @buf: where to get the data from
682 * @ppos: where to start - must be 0
685 static ssize_t smk_write_load(struct file *file, const char __user *buf,
686 size_t count, loff_t *ppos)
689 * Must have privilege.
691 * Enough data must be present.
693 if (!smack_privileged(CAP_MAC_ADMIN))
696 return smk_write_rules_list(file, buf, count, ppos, NULL, NULL,
700 static const struct file_operations smk_load_ops = {
701 .open = smk_open_load,
704 .write = smk_write_load,
705 .release = seq_release,
709 * smk_cipso_doi - initialize the CIPSO domain
711 static void smk_cipso_doi(void)
714 struct cipso_v4_doi *doip;
715 struct netlbl_audit nai;
717 smk_netlabel_audit_set(&nai);
719 rc = netlbl_cfg_map_del(NULL, PF_INET, NULL, NULL, &nai);
721 printk(KERN_WARNING "%s:%d remove rc = %d\n",
722 __func__, __LINE__, rc);
724 doip = kmalloc(sizeof(struct cipso_v4_doi), GFP_KERNEL);
726 panic("smack: Failed to initialize cipso DOI.\n");
727 doip->map.std = NULL;
728 doip->doi = smk_cipso_doi_value;
729 doip->type = CIPSO_V4_MAP_PASS;
730 doip->tags[0] = CIPSO_V4_TAG_RBITMAP;
731 for (rc = 1; rc < CIPSO_V4_TAG_MAXCNT; rc++)
732 doip->tags[rc] = CIPSO_V4_TAG_INVALID;
734 rc = netlbl_cfg_cipsov4_add(doip, &nai);
736 printk(KERN_WARNING "%s:%d cipso add rc = %d\n",
737 __func__, __LINE__, rc);
741 rc = netlbl_cfg_cipsov4_map_add(doip->doi, NULL, NULL, NULL, &nai);
743 printk(KERN_WARNING "%s:%d map add rc = %d\n",
744 __func__, __LINE__, rc);
751 * smk_unlbl_ambient - initialize the unlabeled domain
752 * @oldambient: previous domain string
754 static void smk_unlbl_ambient(char *oldambient)
757 struct netlbl_audit nai;
759 smk_netlabel_audit_set(&nai);
761 if (oldambient != NULL) {
762 rc = netlbl_cfg_map_del(oldambient, PF_INET, NULL, NULL, &nai);
764 printk(KERN_WARNING "%s:%d remove rc = %d\n",
765 __func__, __LINE__, rc);
767 if (smack_net_ambient == NULL)
768 smack_net_ambient = &smack_known_floor;
770 rc = netlbl_cfg_unlbl_map_add(smack_net_ambient->smk_known, PF_INET,
773 printk(KERN_WARNING "%s:%d add rc = %d\n",
774 __func__, __LINE__, rc);
778 * Seq_file read operations for /smack/cipso
781 static void *cipso_seq_start(struct seq_file *s, loff_t *pos)
783 return smk_seq_start(s, pos, &smack_known_list);
786 static void *cipso_seq_next(struct seq_file *s, void *v, loff_t *pos)
788 return smk_seq_next(s, v, pos, &smack_known_list);
792 * Print cipso labels in format:
793 * label level[/cat[,cat]]
795 static int cipso_seq_show(struct seq_file *s, void *v)
797 struct list_head *list = v;
798 struct smack_known *skp =
799 list_entry_rcu(list, struct smack_known, list);
800 struct netlbl_lsm_catmap *cmp = skp->smk_netlabel.attr.mls.cat;
805 * Don't show a label that could not have been set using
806 * /smack/cipso. This is in support of the notion that
807 * anything read from /smack/cipso ought to be writeable
810 * /smack/cipso2 should be used instead.
812 if (strlen(skp->smk_known) >= SMK_LABELLEN)
815 seq_printf(s, "%s %3d", skp->smk_known, skp->smk_netlabel.attr.mls.lvl);
817 for (i = netlbl_catmap_walk(cmp, 0); i >= 0;
818 i = netlbl_catmap_walk(cmp, i + 1)) {
819 seq_printf(s, "%c%d", sep, i);
828 static const struct seq_operations cipso_seq_ops = {
829 .start = cipso_seq_start,
830 .next = cipso_seq_next,
831 .show = cipso_seq_show,
832 .stop = smk_seq_stop,
836 * smk_open_cipso - open() for /smack/cipso
837 * @inode: inode structure representing file
838 * @file: "cipso" file pointer
840 * Connect our cipso_seq_* operations with /smack/cipso
843 static int smk_open_cipso(struct inode *inode, struct file *file)
845 return seq_open(file, &cipso_seq_ops);
849 * smk_set_cipso - do the work for write() for cipso and cipso2
850 * @file: file pointer, not actually used
851 * @buf: where to get the data from
853 * @ppos: where to start
854 * @format: /smack/cipso or /smack/cipso2
856 * Accepts only one cipso rule per write call.
857 * Returns number of bytes written or error code, as appropriate
859 static ssize_t smk_set_cipso(struct file *file, const char __user *buf,
860 size_t count, loff_t *ppos, int format)
862 struct smack_known *skp;
863 struct netlbl_lsm_secattr ncats;
864 char mapcatset[SMK_CIPSOLEN];
868 ssize_t rc = -EINVAL;
875 * Must have privilege.
877 * Enough data must be present.
879 if (!smack_privileged(CAP_MAC_ADMIN))
883 if (format == SMK_FIXED24_FMT &&
884 (count < SMK_CIPSOMIN || count > SMK_CIPSOMAX))
886 if (count > PAGE_SIZE)
889 data = memdup_user_nul(buf, count);
891 return PTR_ERR(data);
895 * Only allow one writer at a time. Writes should be
896 * quite rare and small in any case.
898 mutex_lock(&smack_cipso_lock);
900 skp = smk_import_entry(rule, 0);
906 if (format == SMK_FIXED24_FMT)
907 rule += SMK_LABELLEN;
909 rule += strlen(skp->smk_known) + 1;
911 if (rule > data + count) {
916 ret = sscanf(rule, "%d", &maplevel);
917 if (ret != 1 || maplevel < 0 || maplevel > SMACK_CIPSO_MAXLEVEL)
920 rule += SMK_DIGITLEN;
921 if (rule > data + count) {
926 ret = sscanf(rule, "%d", &catlen);
927 if (ret != 1 || catlen > SMACK_CIPSO_MAXCATNUM)
930 if (format == SMK_FIXED24_FMT &&
931 count != (SMK_CIPSOMIN + catlen * SMK_DIGITLEN))
934 memset(mapcatset, 0, sizeof(mapcatset));
936 for (i = 0; i < catlen; i++) {
937 rule += SMK_DIGITLEN;
938 if (rule > data + count) {
942 ret = sscanf(rule, "%u", &cat);
943 if (ret != 1 || cat > SMACK_CIPSO_MAXCATNUM)
946 smack_catset_bit(cat, mapcatset);
949 rc = smk_netlbl_mls(maplevel, mapcatset, &ncats, SMK_CIPSOLEN);
951 netlbl_catmap_free(skp->smk_netlabel.attr.mls.cat);
952 skp->smk_netlabel.attr.mls.cat = ncats.attr.mls.cat;
953 skp->smk_netlabel.attr.mls.lvl = ncats.attr.mls.lvl;
958 mutex_unlock(&smack_cipso_lock);
964 * smk_write_cipso - write() for /smack/cipso
965 * @file: file pointer, not actually used
966 * @buf: where to get the data from
968 * @ppos: where to start
970 * Accepts only one cipso rule per write call.
971 * Returns number of bytes written or error code, as appropriate
973 static ssize_t smk_write_cipso(struct file *file, const char __user *buf,
974 size_t count, loff_t *ppos)
976 return smk_set_cipso(file, buf, count, ppos, SMK_FIXED24_FMT);
979 static const struct file_operations smk_cipso_ops = {
980 .open = smk_open_cipso,
983 .write = smk_write_cipso,
984 .release = seq_release,
988 * Seq_file read operations for /smack/cipso2
992 * Print cipso labels in format:
993 * label level[/cat[,cat]]
995 static int cipso2_seq_show(struct seq_file *s, void *v)
997 struct list_head *list = v;
998 struct smack_known *skp =
999 list_entry_rcu(list, struct smack_known, list);
1000 struct netlbl_lsm_catmap *cmp = skp->smk_netlabel.attr.mls.cat;
1004 seq_printf(s, "%s %3d", skp->smk_known, skp->smk_netlabel.attr.mls.lvl);
1006 for (i = netlbl_catmap_walk(cmp, 0); i >= 0;
1007 i = netlbl_catmap_walk(cmp, i + 1)) {
1008 seq_printf(s, "%c%d", sep, i);
1017 static const struct seq_operations cipso2_seq_ops = {
1018 .start = cipso_seq_start,
1019 .next = cipso_seq_next,
1020 .show = cipso2_seq_show,
1021 .stop = smk_seq_stop,
1025 * smk_open_cipso2 - open() for /smack/cipso2
1026 * @inode: inode structure representing file
1027 * @file: "cipso2" file pointer
1029 * Connect our cipso_seq_* operations with /smack/cipso2
1032 static int smk_open_cipso2(struct inode *inode, struct file *file)
1034 return seq_open(file, &cipso2_seq_ops);
1038 * smk_write_cipso2 - write() for /smack/cipso2
1039 * @file: file pointer, not actually used
1040 * @buf: where to get the data from
1041 * @count: bytes sent
1042 * @ppos: where to start
1044 * Accepts only one cipso rule per write call.
1045 * Returns number of bytes written or error code, as appropriate
1047 static ssize_t smk_write_cipso2(struct file *file, const char __user *buf,
1048 size_t count, loff_t *ppos)
1050 return smk_set_cipso(file, buf, count, ppos, SMK_LONG_FMT);
1053 static const struct file_operations smk_cipso2_ops = {
1054 .open = smk_open_cipso2,
1056 .llseek = seq_lseek,
1057 .write = smk_write_cipso2,
1058 .release = seq_release,
1062 * Seq_file read operations for /smack/netlabel
1065 static void *net4addr_seq_start(struct seq_file *s, loff_t *pos)
1067 return smk_seq_start(s, pos, &smk_net4addr_list);
1070 static void *net4addr_seq_next(struct seq_file *s, void *v, loff_t *pos)
1072 return smk_seq_next(s, v, pos, &smk_net4addr_list);
1076 * Print host/label pairs
1078 static int net4addr_seq_show(struct seq_file *s, void *v)
1080 struct list_head *list = v;
1081 struct smk_net4addr *skp =
1082 list_entry_rcu(list, struct smk_net4addr, list);
1083 char *kp = SMACK_CIPSO_OPTION;
1085 if (skp->smk_label != NULL)
1086 kp = skp->smk_label->smk_known;
1087 seq_printf(s, "%pI4/%d %s\n", &skp->smk_host.s_addr,
1088 skp->smk_masks, kp);
1093 static const struct seq_operations net4addr_seq_ops = {
1094 .start = net4addr_seq_start,
1095 .next = net4addr_seq_next,
1096 .show = net4addr_seq_show,
1097 .stop = smk_seq_stop,
1101 * smk_open_net4addr - open() for /smack/netlabel
1102 * @inode: inode structure representing file
1103 * @file: "netlabel" file pointer
1105 * Connect our net4addr_seq_* operations with /smack/netlabel
1108 static int smk_open_net4addr(struct inode *inode, struct file *file)
1110 return seq_open(file, &net4addr_seq_ops);
1114 * smk_net4addr_insert
1115 * @new : netlabel to insert
1117 * This helper insert netlabel in the smack_net4addrs list
1118 * sorted by netmask length (longest to smallest)
1119 * locked by &smk_net4addr_lock in smk_write_net4addr
1122 static void smk_net4addr_insert(struct smk_net4addr *new)
1124 struct smk_net4addr *m;
1125 struct smk_net4addr *m_next;
1127 if (list_empty(&smk_net4addr_list)) {
1128 list_add_rcu(&new->list, &smk_net4addr_list);
1132 m = list_entry_rcu(smk_net4addr_list.next,
1133 struct smk_net4addr, list);
1135 /* the comparison '>' is a bit hacky, but works */
1136 if (new->smk_masks > m->smk_masks) {
1137 list_add_rcu(&new->list, &smk_net4addr_list);
1141 list_for_each_entry_rcu(m, &smk_net4addr_list, list) {
1142 if (list_is_last(&m->list, &smk_net4addr_list)) {
1143 list_add_rcu(&new->list, &m->list);
1146 m_next = list_entry_rcu(m->list.next,
1147 struct smk_net4addr, list);
1148 if (new->smk_masks > m_next->smk_masks) {
1149 list_add_rcu(&new->list, &m->list);
1157 * smk_write_net4addr - write() for /smack/netlabel
1158 * @file: file pointer, not actually used
1159 * @buf: where to get the data from
1160 * @count: bytes sent
1161 * @ppos: where to start
1163 * Accepts only one net4addr per write call.
1164 * Returns number of bytes written or error code, as appropriate
1166 static ssize_t smk_write_net4addr(struct file *file, const char __user *buf,
1167 size_t count, loff_t *ppos)
1169 struct smk_net4addr *snp;
1170 struct sockaddr_in newname;
1172 struct smack_known *skp = NULL;
1174 char *host = (char *)&newname.sin_addr.s_addr;
1176 struct netlbl_audit audit_info;
1177 struct in_addr mask;
1181 u32 mask_bits = (1<<31);
1186 * Must have privilege.
1187 * No partial writes.
1188 * Enough data must be present.
1189 * "<addr/mask, as a.b.c.d/e><space><label>"
1190 * "<addr, as a.b.c.d><space><label>"
1192 if (!smack_privileged(CAP_MAC_ADMIN))
1196 if (count < SMK_NETLBLADDRMIN || count > PAGE_SIZE - 1)
1199 data = memdup_user_nul(buf, count);
1201 return PTR_ERR(data);
1203 smack = kzalloc(count + 1, GFP_KERNEL);
1204 if (smack == NULL) {
1209 rc = sscanf(data, "%hhd.%hhd.%hhd.%hhd/%u %s",
1210 &host[0], &host[1], &host[2], &host[3], &masks, smack);
1212 rc = sscanf(data, "%hhd.%hhd.%hhd.%hhd %s",
1213 &host[0], &host[1], &host[2], &host[3], smack);
1221 if (masks > BEBITS) {
1227 * If smack begins with '-', it is an option, don't import it
1229 if (smack[0] != '-') {
1230 skp = smk_import_entry(smack, 0);
1237 * Only the -CIPSO option is supported for IPv4
1239 if (strcmp(smack, SMACK_CIPSO_OPTION) != 0) {
1245 for (m = masks, temp_mask = 0; m > 0; m--) {
1246 temp_mask |= mask_bits;
1249 mask.s_addr = cpu_to_be32(temp_mask);
1251 newname.sin_addr.s_addr &= mask.s_addr;
1253 * Only allow one writer at a time. Writes should be
1254 * quite rare and small in any case.
1256 mutex_lock(&smk_net4addr_lock);
1258 nsa = newname.sin_addr.s_addr;
1259 /* try to find if the prefix is already in the list */
1261 list_for_each_entry_rcu(snp, &smk_net4addr_list, list) {
1262 if (snp->smk_host.s_addr == nsa && snp->smk_masks == masks) {
1267 smk_netlabel_audit_set(&audit_info);
1270 snp = kzalloc(sizeof(*snp), GFP_KERNEL);
1275 snp->smk_host.s_addr = newname.sin_addr.s_addr;
1276 snp->smk_mask.s_addr = mask.s_addr;
1277 snp->smk_label = skp;
1278 snp->smk_masks = masks;
1279 smk_net4addr_insert(snp);
1283 * Delete the unlabeled entry, only if the previous label
1284 * wasn't the special CIPSO option
1286 if (snp->smk_label != NULL)
1287 rc = netlbl_cfg_unlbl_static_del(&init_net, NULL,
1288 &snp->smk_host, &snp->smk_mask,
1289 PF_INET, &audit_info);
1292 snp->smk_label = skp;
1296 * Now tell netlabel about the single label nature of
1297 * this host so that incoming packets get labeled.
1298 * but only if we didn't get the special CIPSO option
1300 if (rc == 0 && skp != NULL)
1301 rc = netlbl_cfg_unlbl_static_add(&init_net, NULL,
1302 &snp->smk_host, &snp->smk_mask, PF_INET,
1303 snp->smk_label->smk_secid, &audit_info);
1308 mutex_unlock(&smk_net4addr_lock);
1318 static const struct file_operations smk_net4addr_ops = {
1319 .open = smk_open_net4addr,
1321 .llseek = seq_lseek,
1322 .write = smk_write_net4addr,
1323 .release = seq_release,
1326 #if IS_ENABLED(CONFIG_IPV6)
1328 * Seq_file read operations for /smack/netlabel6
1331 static void *net6addr_seq_start(struct seq_file *s, loff_t *pos)
1333 return smk_seq_start(s, pos, &smk_net6addr_list);
1336 static void *net6addr_seq_next(struct seq_file *s, void *v, loff_t *pos)
1338 return smk_seq_next(s, v, pos, &smk_net6addr_list);
1342 * Print host/label pairs
1344 static int net6addr_seq_show(struct seq_file *s, void *v)
1346 struct list_head *list = v;
1347 struct smk_net6addr *skp =
1348 list_entry(list, struct smk_net6addr, list);
1350 if (skp->smk_label != NULL)
1351 seq_printf(s, "%pI6/%d %s\n", &skp->smk_host, skp->smk_masks,
1352 skp->smk_label->smk_known);
1357 static const struct seq_operations net6addr_seq_ops = {
1358 .start = net6addr_seq_start,
1359 .next = net6addr_seq_next,
1360 .show = net6addr_seq_show,
1361 .stop = smk_seq_stop,
1365 * smk_open_net6addr - open() for /smack/netlabel
1366 * @inode: inode structure representing file
1367 * @file: "netlabel" file pointer
1369 * Connect our net6addr_seq_* operations with /smack/netlabel
1372 static int smk_open_net6addr(struct inode *inode, struct file *file)
1374 return seq_open(file, &net6addr_seq_ops);
1378 * smk_net6addr_insert
1379 * @new : entry to insert
1381 * This inserts an entry in the smack_net6addrs list
1382 * sorted by netmask length (longest to smallest)
1383 * locked by &smk_net6addr_lock in smk_write_net6addr
1386 static void smk_net6addr_insert(struct smk_net6addr *new)
1388 struct smk_net6addr *m_next;
1389 struct smk_net6addr *m;
1391 if (list_empty(&smk_net6addr_list)) {
1392 list_add_rcu(&new->list, &smk_net6addr_list);
1396 m = list_entry_rcu(smk_net6addr_list.next,
1397 struct smk_net6addr, list);
1399 if (new->smk_masks > m->smk_masks) {
1400 list_add_rcu(&new->list, &smk_net6addr_list);
1404 list_for_each_entry_rcu(m, &smk_net6addr_list, list) {
1405 if (list_is_last(&m->list, &smk_net6addr_list)) {
1406 list_add_rcu(&new->list, &m->list);
1409 m_next = list_entry_rcu(m->list.next,
1410 struct smk_net6addr, list);
1411 if (new->smk_masks > m_next->smk_masks) {
1412 list_add_rcu(&new->list, &m->list);
1420 * smk_write_net6addr - write() for /smack/netlabel
1421 * @file: file pointer, not actually used
1422 * @buf: where to get the data from
1423 * @count: bytes sent
1424 * @ppos: where to start
1426 * Accepts only one net6addr per write call.
1427 * Returns number of bytes written or error code, as appropriate
1429 static ssize_t smk_write_net6addr(struct file *file, const char __user *buf,
1430 size_t count, loff_t *ppos)
1432 struct smk_net6addr *snp;
1433 struct in6_addr newname;
1434 struct in6_addr fullmask;
1435 struct smack_known *skp = NULL;
1441 unsigned int scanned[8];
1443 unsigned int mask = 128;
1446 * Must have privilege.
1447 * No partial writes.
1448 * Enough data must be present.
1449 * "<addr/mask, as a:b:c:d:e:f:g:h/e><space><label>"
1450 * "<addr, as a:b:c:d:e:f:g:h><space><label>"
1452 if (!smack_privileged(CAP_MAC_ADMIN))
1456 if (count < SMK_NETLBLADDRMIN || count > PAGE_SIZE - 1)
1459 data = memdup_user_nul(buf, count);
1461 return PTR_ERR(data);
1463 smack = kzalloc(count + 1, GFP_KERNEL);
1464 if (smack == NULL) {
1469 i = sscanf(data, "%x:%x:%x:%x:%x:%x:%x:%x/%u %s",
1470 &scanned[0], &scanned[1], &scanned[2], &scanned[3],
1471 &scanned[4], &scanned[5], &scanned[6], &scanned[7],
1474 i = sscanf(data, "%x:%x:%x:%x:%x:%x:%x:%x %s",
1475 &scanned[0], &scanned[1], &scanned[2],
1476 &scanned[3], &scanned[4], &scanned[5],
1477 &scanned[6], &scanned[7], smack);
1487 for (i = 0; i < 8; i++) {
1488 if (scanned[i] > 0xffff) {
1492 newname.s6_addr16[i] = htons(scanned[i]);
1496 * If smack begins with '-', it is an option, don't import it
1498 if (smack[0] != '-') {
1499 skp = smk_import_entry(smack, 0);
1506 * Only -DELETE is supported for IPv6
1508 if (strcmp(smack, SMACK_DELETE_OPTION) != 0) {
1514 for (i = 0, m = mask; i < 8; i++) {
1516 fullmask.s6_addr16[i] = 0xffff;
1519 fullmask.s6_addr16[i] = (1 << m) - 1;
1522 fullmask.s6_addr16[i] = 0;
1523 newname.s6_addr16[i] &= fullmask.s6_addr16[i];
1527 * Only allow one writer at a time. Writes should be
1528 * quite rare and small in any case.
1530 mutex_lock(&smk_net6addr_lock);
1532 * Try to find the prefix in the list
1534 list_for_each_entry_rcu(snp, &smk_net6addr_list, list) {
1535 if (mask != snp->smk_masks)
1537 for (found = 1, i = 0; i < 8; i++) {
1538 if (newname.s6_addr16[i] !=
1539 snp->smk_host.s6_addr16[i]) {
1548 snp = kzalloc(sizeof(*snp), GFP_KERNEL);
1552 snp->smk_host = newname;
1553 snp->smk_mask = fullmask;
1554 snp->smk_masks = mask;
1555 snp->smk_label = skp;
1556 smk_net6addr_insert(snp);
1559 snp->smk_label = skp;
1565 mutex_unlock(&smk_net6addr_lock);
1575 static const struct file_operations smk_net6addr_ops = {
1576 .open = smk_open_net6addr,
1578 .llseek = seq_lseek,
1579 .write = smk_write_net6addr,
1580 .release = seq_release,
1582 #endif /* CONFIG_IPV6 */
1585 * smk_read_doi - read() for /smack/doi
1586 * @filp: file pointer, not actually used
1587 * @buf: where to put the result
1588 * @count: maximum to send along
1589 * @ppos: where to start
1591 * Returns number of bytes read or error code, as appropriate
1593 static ssize_t smk_read_doi(struct file *filp, char __user *buf,
1594 size_t count, loff_t *ppos)
1602 sprintf(temp, "%d", smk_cipso_doi_value);
1603 rc = simple_read_from_buffer(buf, count, ppos, temp, strlen(temp));
1609 * smk_write_doi - write() for /smack/doi
1610 * @file: file pointer, not actually used
1611 * @buf: where to get the data from
1612 * @count: bytes sent
1613 * @ppos: where to start
1615 * Returns number of bytes written or error code, as appropriate
1617 static ssize_t smk_write_doi(struct file *file, const char __user *buf,
1618 size_t count, loff_t *ppos)
1623 if (!smack_privileged(CAP_MAC_ADMIN))
1626 if (count >= sizeof(temp) || count == 0)
1629 if (copy_from_user(temp, buf, count) != 0)
1634 if (sscanf(temp, "%d", &i) != 1)
1637 smk_cipso_doi_value = i;
1644 static const struct file_operations smk_doi_ops = {
1645 .read = smk_read_doi,
1646 .write = smk_write_doi,
1647 .llseek = default_llseek,
1651 * smk_read_direct - read() for /smack/direct
1652 * @filp: file pointer, not actually used
1653 * @buf: where to put the result
1654 * @count: maximum to send along
1655 * @ppos: where to start
1657 * Returns number of bytes read or error code, as appropriate
1659 static ssize_t smk_read_direct(struct file *filp, char __user *buf,
1660 size_t count, loff_t *ppos)
1668 sprintf(temp, "%d", smack_cipso_direct);
1669 rc = simple_read_from_buffer(buf, count, ppos, temp, strlen(temp));
1675 * smk_write_direct - write() for /smack/direct
1676 * @file: file pointer, not actually used
1677 * @buf: where to get the data from
1678 * @count: bytes sent
1679 * @ppos: where to start
1681 * Returns number of bytes written or error code, as appropriate
1683 static ssize_t smk_write_direct(struct file *file, const char __user *buf,
1684 size_t count, loff_t *ppos)
1686 struct smack_known *skp;
1690 if (!smack_privileged(CAP_MAC_ADMIN))
1693 if (count >= sizeof(temp) || count == 0)
1696 if (copy_from_user(temp, buf, count) != 0)
1701 if (sscanf(temp, "%d", &i) != 1)
1705 * Don't do anything if the value hasn't actually changed.
1706 * If it is changing reset the level on entries that were
1707 * set up to be direct when they were created.
1709 if (smack_cipso_direct != i) {
1710 mutex_lock(&smack_known_lock);
1711 list_for_each_entry_rcu(skp, &smack_known_list, list)
1712 if (skp->smk_netlabel.attr.mls.lvl ==
1714 skp->smk_netlabel.attr.mls.lvl = i;
1715 smack_cipso_direct = i;
1716 mutex_unlock(&smack_known_lock);
1722 static const struct file_operations smk_direct_ops = {
1723 .read = smk_read_direct,
1724 .write = smk_write_direct,
1725 .llseek = default_llseek,
1729 * smk_read_mapped - read() for /smack/mapped
1730 * @filp: file pointer, not actually used
1731 * @buf: where to put the result
1732 * @count: maximum to send along
1733 * @ppos: where to start
1735 * Returns number of bytes read or error code, as appropriate
1737 static ssize_t smk_read_mapped(struct file *filp, char __user *buf,
1738 size_t count, loff_t *ppos)
1746 sprintf(temp, "%d", smack_cipso_mapped);
1747 rc = simple_read_from_buffer(buf, count, ppos, temp, strlen(temp));
1753 * smk_write_mapped - write() for /smack/mapped
1754 * @file: file pointer, not actually used
1755 * @buf: where to get the data from
1756 * @count: bytes sent
1757 * @ppos: where to start
1759 * Returns number of bytes written or error code, as appropriate
1761 static ssize_t smk_write_mapped(struct file *file, const char __user *buf,
1762 size_t count, loff_t *ppos)
1764 struct smack_known *skp;
1768 if (!smack_privileged(CAP_MAC_ADMIN))
1771 if (count >= sizeof(temp) || count == 0)
1774 if (copy_from_user(temp, buf, count) != 0)
1779 if (sscanf(temp, "%d", &i) != 1)
1783 * Don't do anything if the value hasn't actually changed.
1784 * If it is changing reset the level on entries that were
1785 * set up to be mapped when they were created.
1787 if (smack_cipso_mapped != i) {
1788 mutex_lock(&smack_known_lock);
1789 list_for_each_entry_rcu(skp, &smack_known_list, list)
1790 if (skp->smk_netlabel.attr.mls.lvl ==
1792 skp->smk_netlabel.attr.mls.lvl = i;
1793 smack_cipso_mapped = i;
1794 mutex_unlock(&smack_known_lock);
1800 static const struct file_operations smk_mapped_ops = {
1801 .read = smk_read_mapped,
1802 .write = smk_write_mapped,
1803 .llseek = default_llseek,
1807 * smk_read_ambient - read() for /smack/ambient
1808 * @filp: file pointer, not actually used
1809 * @buf: where to put the result
1810 * @cn: maximum to send along
1811 * @ppos: where to start
1813 * Returns number of bytes read or error code, as appropriate
1815 static ssize_t smk_read_ambient(struct file *filp, char __user *buf,
1816 size_t cn, loff_t *ppos)
1824 * Being careful to avoid a problem in the case where
1825 * smack_net_ambient gets changed in midstream.
1827 mutex_lock(&smack_ambient_lock);
1829 asize = strlen(smack_net_ambient->smk_known) + 1;
1832 rc = simple_read_from_buffer(buf, cn, ppos,
1833 smack_net_ambient->smk_known,
1838 mutex_unlock(&smack_ambient_lock);
1844 * smk_write_ambient - write() for /smack/ambient
1845 * @file: file pointer, not actually used
1846 * @buf: where to get the data from
1847 * @count: bytes sent
1848 * @ppos: where to start
1850 * Returns number of bytes written or error code, as appropriate
1852 static ssize_t smk_write_ambient(struct file *file, const char __user *buf,
1853 size_t count, loff_t *ppos)
1855 struct smack_known *skp;
1860 if (!smack_privileged(CAP_MAC_ADMIN))
1863 /* Enough data must be present */
1864 if (count == 0 || count > PAGE_SIZE)
1867 data = memdup_user_nul(buf, count);
1869 return PTR_ERR(data);
1871 skp = smk_import_entry(data, count);
1877 mutex_lock(&smack_ambient_lock);
1879 oldambient = smack_net_ambient->smk_known;
1880 smack_net_ambient = skp;
1881 smk_unlbl_ambient(oldambient);
1883 mutex_unlock(&smack_ambient_lock);
1890 static const struct file_operations smk_ambient_ops = {
1891 .read = smk_read_ambient,
1892 .write = smk_write_ambient,
1893 .llseek = default_llseek,
1897 * Seq_file operations for /smack/onlycap
1899 static void *onlycap_seq_start(struct seq_file *s, loff_t *pos)
1901 return smk_seq_start(s, pos, &smack_onlycap_list);
1904 static void *onlycap_seq_next(struct seq_file *s, void *v, loff_t *pos)
1906 return smk_seq_next(s, v, pos, &smack_onlycap_list);
1909 static int onlycap_seq_show(struct seq_file *s, void *v)
1911 struct list_head *list = v;
1912 struct smack_known_list_elem *sklep =
1913 list_entry_rcu(list, struct smack_known_list_elem, list);
1915 seq_puts(s, sklep->smk_label->smk_known);
1921 static const struct seq_operations onlycap_seq_ops = {
1922 .start = onlycap_seq_start,
1923 .next = onlycap_seq_next,
1924 .show = onlycap_seq_show,
1925 .stop = smk_seq_stop,
1928 static int smk_open_onlycap(struct inode *inode, struct file *file)
1930 return seq_open(file, &onlycap_seq_ops);
1934 * smk_list_swap_rcu - swap public list with a private one in RCU-safe way
1935 * The caller must hold appropriate mutex to prevent concurrent modifications
1936 * to the public list.
1937 * Private list is assumed to be not accessible to other threads yet.
1939 * @public: public list
1940 * @private: private list
1942 static void smk_list_swap_rcu(struct list_head *public,
1943 struct list_head *private)
1945 struct list_head *first, *last;
1947 if (list_empty(public)) {
1948 list_splice_init_rcu(private, public, synchronize_rcu);
1950 /* Remember public list before replacing it */
1951 first = public->next;
1952 last = public->prev;
1954 /* Publish private list in place of public in RCU-safe way */
1955 private->prev->next = public;
1956 private->next->prev = public;
1957 rcu_assign_pointer(public->next, private->next);
1958 public->prev = private->prev;
1962 /* When all readers are done with the old public list,
1963 * attach it in place of private */
1964 private->next = first;
1965 private->prev = last;
1966 first->prev = private;
1967 last->next = private;
1972 * smk_parse_label_list - parse list of Smack labels, separated by spaces
1974 * @data: the string to parse
1975 * @private: destination list
1977 * Returns zero on success or error code, as appropriate
1979 static int smk_parse_label_list(char *data, struct list_head *list)
1982 struct smack_known *skp;
1983 struct smack_known_list_elem *sklep;
1985 while ((tok = strsep(&data, " ")) != NULL) {
1989 skp = smk_import_entry(tok, 0);
1991 return PTR_ERR(skp);
1993 sklep = kzalloc(sizeof(*sklep), GFP_KERNEL);
1997 sklep->smk_label = skp;
1998 list_add(&sklep->list, list);
2005 * smk_destroy_label_list - destroy a list of smack_known_list_elem
2006 * @head: header pointer of the list to destroy
2008 void smk_destroy_label_list(struct list_head *list)
2010 struct smack_known_list_elem *sklep;
2011 struct smack_known_list_elem *sklep2;
2013 list_for_each_entry_safe(sklep, sklep2, list, list)
2016 INIT_LIST_HEAD(list);
2020 * smk_write_onlycap - write() for smackfs/onlycap
2021 * @file: file pointer, not actually used
2022 * @buf: where to get the data from
2023 * @count: bytes sent
2024 * @ppos: where to start
2026 * Returns number of bytes written or error code, as appropriate
2028 static ssize_t smk_write_onlycap(struct file *file, const char __user *buf,
2029 size_t count, loff_t *ppos)
2032 LIST_HEAD(list_tmp);
2035 if (!smack_privileged(CAP_MAC_ADMIN))
2038 if (count > PAGE_SIZE)
2041 data = memdup_user_nul(buf, count);
2043 return PTR_ERR(data);
2045 rc = smk_parse_label_list(data, &list_tmp);
2049 * Clear the smack_onlycap on invalid label errors. This means
2050 * that we can pass a null string to unset the onlycap value.
2052 * Importing will also reject a label beginning with '-',
2053 * so "-usecapabilities" will also work.
2055 * But do so only on invalid label, not on system errors.
2056 * The invalid label must be first to count as clearing attempt.
2058 if (!rc || (rc == -EINVAL && list_empty(&list_tmp))) {
2059 mutex_lock(&smack_onlycap_lock);
2060 smk_list_swap_rcu(&smack_onlycap_list, &list_tmp);
2061 mutex_unlock(&smack_onlycap_lock);
2065 smk_destroy_label_list(&list_tmp);
2070 static const struct file_operations smk_onlycap_ops = {
2071 .open = smk_open_onlycap,
2073 .write = smk_write_onlycap,
2074 .llseek = seq_lseek,
2075 .release = seq_release,
2078 #ifdef CONFIG_SECURITY_SMACK_BRINGUP
2080 * smk_read_unconfined - read() for smackfs/unconfined
2081 * @filp: file pointer, not actually used
2082 * @buf: where to put the result
2083 * @cn: maximum to send along
2084 * @ppos: where to start
2086 * Returns number of bytes read or error code, as appropriate
2088 static ssize_t smk_read_unconfined(struct file *filp, char __user *buf,
2089 size_t cn, loff_t *ppos)
2092 ssize_t rc = -EINVAL;
2098 if (smack_unconfined != NULL)
2099 smack = smack_unconfined->smk_known;
2101 asize = strlen(smack) + 1;
2104 rc = simple_read_from_buffer(buf, cn, ppos, smack, asize);
2110 * smk_write_unconfined - write() for smackfs/unconfined
2111 * @file: file pointer, not actually used
2112 * @buf: where to get the data from
2113 * @count: bytes sent
2114 * @ppos: where to start
2116 * Returns number of bytes written or error code, as appropriate
2118 static ssize_t smk_write_unconfined(struct file *file, const char __user *buf,
2119 size_t count, loff_t *ppos)
2122 struct smack_known *skp;
2125 if (!smack_privileged(CAP_MAC_ADMIN))
2128 if (count > PAGE_SIZE)
2131 data = memdup_user_nul(buf, count);
2133 return PTR_ERR(data);
2136 * Clear the smack_unconfined on invalid label errors. This means
2137 * that we can pass a null string to unset the unconfined value.
2139 * Importing will also reject a label beginning with '-',
2140 * so "-confine" will also work.
2142 * But do so only on invalid label, not on system errors.
2144 skp = smk_import_entry(data, count);
2145 if (PTR_ERR(skp) == -EINVAL)
2147 else if (IS_ERR(skp)) {
2152 smack_unconfined = skp;
2159 static const struct file_operations smk_unconfined_ops = {
2160 .read = smk_read_unconfined,
2161 .write = smk_write_unconfined,
2162 .llseek = default_llseek,
2164 #endif /* CONFIG_SECURITY_SMACK_BRINGUP */
2167 * smk_read_logging - read() for /smack/logging
2168 * @filp: file pointer, not actually used
2169 * @buf: where to put the result
2170 * @cn: maximum to send along
2171 * @ppos: where to start
2173 * Returns number of bytes read or error code, as appropriate
2175 static ssize_t smk_read_logging(struct file *filp, char __user *buf,
2176 size_t count, loff_t *ppos)
2184 sprintf(temp, "%d\n", log_policy);
2185 rc = simple_read_from_buffer(buf, count, ppos, temp, strlen(temp));
2190 * smk_write_logging - write() for /smack/logging
2191 * @file: file pointer, not actually used
2192 * @buf: where to get the data from
2193 * @count: bytes sent
2194 * @ppos: where to start
2196 * Returns number of bytes written or error code, as appropriate
2198 static ssize_t smk_write_logging(struct file *file, const char __user *buf,
2199 size_t count, loff_t *ppos)
2204 if (!smack_privileged(CAP_MAC_ADMIN))
2207 if (count >= sizeof(temp) || count == 0)
2210 if (copy_from_user(temp, buf, count) != 0)
2215 if (sscanf(temp, "%d", &i) != 1)
2225 static const struct file_operations smk_logging_ops = {
2226 .read = smk_read_logging,
2227 .write = smk_write_logging,
2228 .llseek = default_llseek,
2232 * Seq_file read operations for /smack/load-self
2235 static void *load_self_seq_start(struct seq_file *s, loff_t *pos)
2237 struct task_smack *tsp = current_security();
2239 return smk_seq_start(s, pos, &tsp->smk_rules);
2242 static void *load_self_seq_next(struct seq_file *s, void *v, loff_t *pos)
2244 struct task_smack *tsp = current_security();
2246 return smk_seq_next(s, v, pos, &tsp->smk_rules);
2249 static int load_self_seq_show(struct seq_file *s, void *v)
2251 struct list_head *list = v;
2252 struct smack_rule *srp =
2253 list_entry_rcu(list, struct smack_rule, list);
2255 smk_rule_show(s, srp, SMK_LABELLEN);
2260 static const struct seq_operations load_self_seq_ops = {
2261 .start = load_self_seq_start,
2262 .next = load_self_seq_next,
2263 .show = load_self_seq_show,
2264 .stop = smk_seq_stop,
2269 * smk_open_load_self - open() for /smack/load-self2
2270 * @inode: inode structure representing file
2271 * @file: "load" file pointer
2273 * For reading, use load_seq_* seq_file reading operations.
2275 static int smk_open_load_self(struct inode *inode, struct file *file)
2277 return seq_open(file, &load_self_seq_ops);
2281 * smk_write_load_self - write() for /smack/load-self
2282 * @file: file pointer, not actually used
2283 * @buf: where to get the data from
2284 * @count: bytes sent
2285 * @ppos: where to start - must be 0
2288 static ssize_t smk_write_load_self(struct file *file, const char __user *buf,
2289 size_t count, loff_t *ppos)
2291 struct task_smack *tsp = current_security();
2293 return smk_write_rules_list(file, buf, count, ppos, &tsp->smk_rules,
2294 &tsp->smk_rules_lock, SMK_FIXED24_FMT);
2297 static const struct file_operations smk_load_self_ops = {
2298 .open = smk_open_load_self,
2300 .llseek = seq_lseek,
2301 .write = smk_write_load_self,
2302 .release = seq_release,
2306 * smk_user_access - handle access check transaction
2307 * @file: file pointer
2308 * @buf: data from user space
2309 * @count: bytes sent
2310 * @ppos: where to start - must be 0
2312 static ssize_t smk_user_access(struct file *file, const char __user *buf,
2313 size_t count, loff_t *ppos, int format)
2315 struct smack_parsed_rule rule;
2319 data = simple_transaction_get(file, buf, count);
2321 return PTR_ERR(data);
2323 if (format == SMK_FIXED24_FMT) {
2324 if (count < SMK_LOADLEN)
2326 res = smk_parse_rule(data, &rule, 0);
2329 * simple_transaction_get() returns null-terminated data
2331 res = smk_parse_long_rule(data, &rule, 0, 3);
2335 res = smk_access(rule.smk_subject, rule.smk_object,
2336 rule.smk_access1, NULL);
2337 else if (res != -ENOENT)
2341 * smk_access() can return a value > 0 in the "bringup" case.
2343 data[0] = res >= 0 ? '1' : '0';
2346 simple_transaction_set(file, 2);
2348 if (format == SMK_FIXED24_FMT)
2354 * smk_write_access - handle access check transaction
2355 * @file: file pointer
2356 * @buf: data from user space
2357 * @count: bytes sent
2358 * @ppos: where to start - must be 0
2360 static ssize_t smk_write_access(struct file *file, const char __user *buf,
2361 size_t count, loff_t *ppos)
2363 return smk_user_access(file, buf, count, ppos, SMK_FIXED24_FMT);
2366 static const struct file_operations smk_access_ops = {
2367 .write = smk_write_access,
2368 .read = simple_transaction_read,
2369 .release = simple_transaction_release,
2370 .llseek = generic_file_llseek,
2375 * Seq_file read operations for /smack/load2
2378 static int load2_seq_show(struct seq_file *s, void *v)
2380 struct list_head *list = v;
2381 struct smack_master_list *smlp =
2382 list_entry_rcu(list, struct smack_master_list, list);
2384 smk_rule_show(s, smlp->smk_rule, SMK_LONGLABEL);
2389 static const struct seq_operations load2_seq_ops = {
2390 .start = load2_seq_start,
2391 .next = load2_seq_next,
2392 .show = load2_seq_show,
2393 .stop = smk_seq_stop,
2397 * smk_open_load2 - open() for /smack/load2
2398 * @inode: inode structure representing file
2399 * @file: "load2" file pointer
2401 * For reading, use load2_seq_* seq_file reading operations.
2403 static int smk_open_load2(struct inode *inode, struct file *file)
2405 return seq_open(file, &load2_seq_ops);
2409 * smk_write_load2 - write() for /smack/load2
2410 * @file: file pointer, not actually used
2411 * @buf: where to get the data from
2412 * @count: bytes sent
2413 * @ppos: where to start - must be 0
2416 static ssize_t smk_write_load2(struct file *file, const char __user *buf,
2417 size_t count, loff_t *ppos)
2420 * Must have privilege.
2422 if (!smack_privileged(CAP_MAC_ADMIN))
2425 return smk_write_rules_list(file, buf, count, ppos, NULL, NULL,
2429 static const struct file_operations smk_load2_ops = {
2430 .open = smk_open_load2,
2432 .llseek = seq_lseek,
2433 .write = smk_write_load2,
2434 .release = seq_release,
2438 * Seq_file read operations for /smack/load-self2
2441 static void *load_self2_seq_start(struct seq_file *s, loff_t *pos)
2443 struct task_smack *tsp = current_security();
2445 return smk_seq_start(s, pos, &tsp->smk_rules);
2448 static void *load_self2_seq_next(struct seq_file *s, void *v, loff_t *pos)
2450 struct task_smack *tsp = current_security();
2452 return smk_seq_next(s, v, pos, &tsp->smk_rules);
2455 static int load_self2_seq_show(struct seq_file *s, void *v)
2457 struct list_head *list = v;
2458 struct smack_rule *srp =
2459 list_entry_rcu(list, struct smack_rule, list);
2461 smk_rule_show(s, srp, SMK_LONGLABEL);
2466 static const struct seq_operations load_self2_seq_ops = {
2467 .start = load_self2_seq_start,
2468 .next = load_self2_seq_next,
2469 .show = load_self2_seq_show,
2470 .stop = smk_seq_stop,
2474 * smk_open_load_self2 - open() for /smack/load-self2
2475 * @inode: inode structure representing file
2476 * @file: "load" file pointer
2478 * For reading, use load_seq_* seq_file reading operations.
2480 static int smk_open_load_self2(struct inode *inode, struct file *file)
2482 return seq_open(file, &load_self2_seq_ops);
2486 * smk_write_load_self2 - write() for /smack/load-self2
2487 * @file: file pointer, not actually used
2488 * @buf: where to get the data from
2489 * @count: bytes sent
2490 * @ppos: where to start - must be 0
2493 static ssize_t smk_write_load_self2(struct file *file, const char __user *buf,
2494 size_t count, loff_t *ppos)
2496 struct task_smack *tsp = current_security();
2498 return smk_write_rules_list(file, buf, count, ppos, &tsp->smk_rules,
2499 &tsp->smk_rules_lock, SMK_LONG_FMT);
2502 static const struct file_operations smk_load_self2_ops = {
2503 .open = smk_open_load_self2,
2505 .llseek = seq_lseek,
2506 .write = smk_write_load_self2,
2507 .release = seq_release,
2511 * smk_write_access2 - handle access check transaction
2512 * @file: file pointer
2513 * @buf: data from user space
2514 * @count: bytes sent
2515 * @ppos: where to start - must be 0
2517 static ssize_t smk_write_access2(struct file *file, const char __user *buf,
2518 size_t count, loff_t *ppos)
2520 return smk_user_access(file, buf, count, ppos, SMK_LONG_FMT);
2523 static const struct file_operations smk_access2_ops = {
2524 .write = smk_write_access2,
2525 .read = simple_transaction_read,
2526 .release = simple_transaction_release,
2527 .llseek = generic_file_llseek,
2531 * smk_write_revoke_subj - write() for /smack/revoke-subject
2532 * @file: file pointer
2533 * @buf: data from user space
2534 * @count: bytes sent
2535 * @ppos: where to start - must be 0
2537 static ssize_t smk_write_revoke_subj(struct file *file, const char __user *buf,
2538 size_t count, loff_t *ppos)
2542 struct smack_known *skp;
2543 struct smack_rule *sp;
2544 struct list_head *rule_list;
2545 struct mutex *rule_lock;
2551 if (!smack_privileged(CAP_MAC_ADMIN))
2554 if (count == 0 || count > SMK_LONGLABEL)
2557 data = memdup_user(buf, count);
2559 return PTR_ERR(data);
2561 cp = smk_parse_smack(data, count);
2567 skp = smk_find_entry(cp);
2571 rule_list = &skp->smk_rules;
2572 rule_lock = &skp->smk_rules_lock;
2574 mutex_lock(rule_lock);
2576 list_for_each_entry_rcu(sp, rule_list, list)
2579 mutex_unlock(rule_lock);
2589 static const struct file_operations smk_revoke_subj_ops = {
2590 .write = smk_write_revoke_subj,
2591 .read = simple_transaction_read,
2592 .release = simple_transaction_release,
2593 .llseek = generic_file_llseek,
2597 * smk_init_sysfs - initialize /sys/fs/smackfs
2600 static int smk_init_sysfs(void)
2602 return sysfs_create_mount_point(fs_kobj, "smackfs");
2606 * smk_write_change_rule - write() for /smack/change-rule
2607 * @file: file pointer
2608 * @buf: data from user space
2609 * @count: bytes sent
2610 * @ppos: where to start - must be 0
2612 static ssize_t smk_write_change_rule(struct file *file, const char __user *buf,
2613 size_t count, loff_t *ppos)
2616 * Must have privilege.
2618 if (!smack_privileged(CAP_MAC_ADMIN))
2621 return smk_write_rules_list(file, buf, count, ppos, NULL, NULL,
2625 static const struct file_operations smk_change_rule_ops = {
2626 .write = smk_write_change_rule,
2627 .read = simple_transaction_read,
2628 .release = simple_transaction_release,
2629 .llseek = generic_file_llseek,
2633 * smk_read_syslog - read() for smackfs/syslog
2634 * @filp: file pointer, not actually used
2635 * @buf: where to put the result
2636 * @cn: maximum to send along
2637 * @ppos: where to start
2639 * Returns number of bytes read or error code, as appropriate
2641 static ssize_t smk_read_syslog(struct file *filp, char __user *buf,
2642 size_t cn, loff_t *ppos)
2644 struct smack_known *skp;
2645 ssize_t rc = -EINVAL;
2651 if (smack_syslog_label == NULL)
2652 skp = &smack_known_star;
2654 skp = smack_syslog_label;
2656 asize = strlen(skp->smk_known) + 1;
2659 rc = simple_read_from_buffer(buf, cn, ppos, skp->smk_known,
2666 * smk_write_syslog - write() for smackfs/syslog
2667 * @file: file pointer, not actually used
2668 * @buf: where to get the data from
2669 * @count: bytes sent
2670 * @ppos: where to start
2672 * Returns number of bytes written or error code, as appropriate
2674 static ssize_t smk_write_syslog(struct file *file, const char __user *buf,
2675 size_t count, loff_t *ppos)
2678 struct smack_known *skp;
2681 if (!smack_privileged(CAP_MAC_ADMIN))
2684 /* Enough data must be present */
2685 if (count == 0 || count > PAGE_SIZE)
2688 data = memdup_user_nul(buf, count);
2690 return PTR_ERR(data);
2692 skp = smk_import_entry(data, count);
2696 smack_syslog_label = skp;
2702 static const struct file_operations smk_syslog_ops = {
2703 .read = smk_read_syslog,
2704 .write = smk_write_syslog,
2705 .llseek = default_llseek,
2709 * Seq_file read operations for /smack/relabel-self
2712 static void *relabel_self_seq_start(struct seq_file *s, loff_t *pos)
2714 struct task_smack *tsp = current_security();
2716 return smk_seq_start(s, pos, &tsp->smk_relabel);
2719 static void *relabel_self_seq_next(struct seq_file *s, void *v, loff_t *pos)
2721 struct task_smack *tsp = current_security();
2723 return smk_seq_next(s, v, pos, &tsp->smk_relabel);
2726 static int relabel_self_seq_show(struct seq_file *s, void *v)
2728 struct list_head *list = v;
2729 struct smack_known_list_elem *sklep =
2730 list_entry(list, struct smack_known_list_elem, list);
2732 seq_puts(s, sklep->smk_label->smk_known);
2738 static const struct seq_operations relabel_self_seq_ops = {
2739 .start = relabel_self_seq_start,
2740 .next = relabel_self_seq_next,
2741 .show = relabel_self_seq_show,
2742 .stop = smk_seq_stop,
2746 * smk_open_relabel_self - open() for /smack/relabel-self
2747 * @inode: inode structure representing file
2748 * @file: "relabel-self" file pointer
2750 * Connect our relabel_self_seq_* operations with /smack/relabel-self
2753 static int smk_open_relabel_self(struct inode *inode, struct file *file)
2755 return seq_open(file, &relabel_self_seq_ops);
2759 * smk_write_relabel_self - write() for /smack/relabel-self
2760 * @file: file pointer, not actually used
2761 * @buf: where to get the data from
2762 * @count: bytes sent
2763 * @ppos: where to start - must be 0
2766 static ssize_t smk_write_relabel_self(struct file *file, const char __user *buf,
2767 size_t count, loff_t *ppos)
2771 LIST_HEAD(list_tmp);
2774 * Must have privilege.
2776 if (!smack_privileged(CAP_MAC_ADMIN))
2781 * Enough data must be present.
2785 if (count == 0 || count > PAGE_SIZE)
2788 data = memdup_user_nul(buf, count);
2790 return PTR_ERR(data);
2792 rc = smk_parse_label_list(data, &list_tmp);
2795 if (!rc || (rc == -EINVAL && list_empty(&list_tmp))) {
2797 struct task_smack *tsp;
2799 new = prepare_creds();
2804 tsp = new->security;
2805 smk_destroy_label_list(&tsp->smk_relabel);
2806 list_splice(&list_tmp, &tsp->smk_relabel);
2811 smk_destroy_label_list(&list_tmp);
2815 static const struct file_operations smk_relabel_self_ops = {
2816 .open = smk_open_relabel_self,
2818 .llseek = seq_lseek,
2819 .write = smk_write_relabel_self,
2820 .release = seq_release,
2824 * smk_read_ptrace - read() for /smack/ptrace
2825 * @filp: file pointer, not actually used
2826 * @buf: where to put the result
2827 * @count: maximum to send along
2828 * @ppos: where to start
2830 * Returns number of bytes read or error code, as appropriate
2832 static ssize_t smk_read_ptrace(struct file *filp, char __user *buf,
2833 size_t count, loff_t *ppos)
2841 sprintf(temp, "%d\n", smack_ptrace_rule);
2842 rc = simple_read_from_buffer(buf, count, ppos, temp, strlen(temp));
2847 * smk_write_ptrace - write() for /smack/ptrace
2848 * @file: file pointer
2849 * @buf: data from user space
2850 * @count: bytes sent
2851 * @ppos: where to start - must be 0
2853 static ssize_t smk_write_ptrace(struct file *file, const char __user *buf,
2854 size_t count, loff_t *ppos)
2859 if (!smack_privileged(CAP_MAC_ADMIN))
2862 if (*ppos != 0 || count >= sizeof(temp) || count == 0)
2865 if (copy_from_user(temp, buf, count) != 0)
2870 if (sscanf(temp, "%d", &i) != 1)
2872 if (i < SMACK_PTRACE_DEFAULT || i > SMACK_PTRACE_MAX)
2874 smack_ptrace_rule = i;
2879 static const struct file_operations smk_ptrace_ops = {
2880 .write = smk_write_ptrace,
2881 .read = smk_read_ptrace,
2882 .llseek = default_llseek,
2886 * smk_fill_super - fill the smackfs superblock
2887 * @sb: the empty superblock
2891 * Fill in the well known entries for the smack filesystem
2893 * Returns 0 on success, an error code on failure
2895 static int smk_fill_super(struct super_block *sb, void *data, int silent)
2898 struct inode *root_inode;
2900 static const struct tree_descr smack_files[] = {
2902 "load", &smk_load_ops, S_IRUGO|S_IWUSR},
2904 "cipso", &smk_cipso_ops, S_IRUGO|S_IWUSR},
2906 "doi", &smk_doi_ops, S_IRUGO|S_IWUSR},
2908 "direct", &smk_direct_ops, S_IRUGO|S_IWUSR},
2910 "ambient", &smk_ambient_ops, S_IRUGO|S_IWUSR},
2912 "netlabel", &smk_net4addr_ops, S_IRUGO|S_IWUSR},
2914 "onlycap", &smk_onlycap_ops, S_IRUGO|S_IWUSR},
2916 "logging", &smk_logging_ops, S_IRUGO|S_IWUSR},
2918 "load-self", &smk_load_self_ops, S_IRUGO|S_IWUGO},
2920 "access", &smk_access_ops, S_IRUGO|S_IWUGO},
2922 "mapped", &smk_mapped_ops, S_IRUGO|S_IWUSR},
2924 "load2", &smk_load2_ops, S_IRUGO|S_IWUSR},
2925 [SMK_LOAD_SELF2] = {
2926 "load-self2", &smk_load_self2_ops, S_IRUGO|S_IWUGO},
2928 "access2", &smk_access2_ops, S_IRUGO|S_IWUGO},
2930 "cipso2", &smk_cipso2_ops, S_IRUGO|S_IWUSR},
2931 [SMK_REVOKE_SUBJ] = {
2932 "revoke-subject", &smk_revoke_subj_ops,
2934 [SMK_CHANGE_RULE] = {
2935 "change-rule", &smk_change_rule_ops, S_IRUGO|S_IWUSR},
2937 "syslog", &smk_syslog_ops, S_IRUGO|S_IWUSR},
2939 "ptrace", &smk_ptrace_ops, S_IRUGO|S_IWUSR},
2940 #ifdef CONFIG_SECURITY_SMACK_BRINGUP
2941 [SMK_UNCONFINED] = {
2942 "unconfined", &smk_unconfined_ops, S_IRUGO|S_IWUSR},
2944 #if IS_ENABLED(CONFIG_IPV6)
2946 "ipv6host", &smk_net6addr_ops, S_IRUGO|S_IWUSR},
2947 #endif /* CONFIG_IPV6 */
2948 [SMK_RELABEL_SELF] = {
2949 "relabel-self", &smk_relabel_self_ops,
2955 rc = simple_fill_super(sb, SMACK_MAGIC, smack_files);
2957 printk(KERN_ERR "%s failed %d while creating inodes\n",
2962 root_inode = d_inode(sb->s_root);
2968 * smk_mount - get the smackfs superblock
2969 * @fs_type: passed along without comment
2970 * @flags: passed along without comment
2971 * @dev_name: passed along without comment
2972 * @data: passed along without comment
2974 * Just passes everything along.
2976 * Returns what the lower level code does.
2978 static struct dentry *smk_mount(struct file_system_type *fs_type,
2979 int flags, const char *dev_name, void *data)
2981 return mount_single(fs_type, flags, data, smk_fill_super);
2984 static struct file_system_type smk_fs_type = {
2987 .kill_sb = kill_litter_super,
2990 static struct vfsmount *smackfs_mount;
2992 static int __init smk_preset_netlabel(struct smack_known *skp)
2994 skp->smk_netlabel.domain = skp->smk_known;
2995 skp->smk_netlabel.flags =
2996 NETLBL_SECATTR_DOMAIN | NETLBL_SECATTR_MLS_LVL;
2997 return smk_netlbl_mls(smack_cipso_direct, skp->smk_known,
2998 &skp->smk_netlabel, strlen(skp->smk_known));
3002 * init_smk_fs - get the smackfs superblock
3004 * register the smackfs
3006 * Do not register smackfs if Smack wasn't enabled
3007 * on boot. We can not put this method normally under the
3008 * smack_init() code path since the security subsystem get
3009 * initialized before the vfs caches.
3011 * Returns true if we were not chosen on boot or if
3012 * we were chosen and filesystem registration succeeded.
3014 static int __init init_smk_fs(void)
3019 if (smack_enabled == 0)
3022 err = smk_init_sysfs();
3024 printk(KERN_ERR "smackfs: sysfs mountpoint problem.\n");
3026 err = register_filesystem(&smk_fs_type);
3028 smackfs_mount = kern_mount(&smk_fs_type);
3029 if (IS_ERR(smackfs_mount)) {
3030 printk(KERN_ERR "smackfs: could not mount!\n");
3031 err = PTR_ERR(smackfs_mount);
3032 smackfs_mount = NULL;
3037 smk_unlbl_ambient(NULL);
3039 rc = smk_preset_netlabel(&smack_known_floor);
3040 if (err == 0 && rc < 0)
3042 rc = smk_preset_netlabel(&smack_known_hat);
3043 if (err == 0 && rc < 0)
3045 rc = smk_preset_netlabel(&smack_known_huh);
3046 if (err == 0 && rc < 0)
3048 rc = smk_preset_netlabel(&smack_known_star);
3049 if (err == 0 && rc < 0)
3051 rc = smk_preset_netlabel(&smack_known_web);
3052 if (err == 0 && rc < 0)
3058 __initcall(init_smk_fs);