2 * Copyright (C) 2007 Casey Schaufler <casey@schaufler-ca.com>
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation, version 2.
9 * Casey Schaufler <casey@schaufler-ca.com>
10 * Ahmed S. Darwish <darwish.07@gmail.com>
12 * Special thanks to the authors of selinuxfs.
14 * Karl MacMillan <kmacmillan@tresys.com>
15 * James Morris <jmorris@redhat.com>
19 #include <linux/kernel.h>
20 #include <linux/vmalloc.h>
21 #include <linux/security.h>
22 #include <linux/mutex.h>
23 #include <linux/slab.h>
24 #include <net/net_namespace.h>
25 #include <net/cipso_ipv4.h>
26 #include <linux/seq_file.h>
27 #include <linux/ctype.h>
28 #include <linux/audit.h>
29 #include <linux/magic.h>
32 #define BEBITS (sizeof(__be32) * 8)
34 * smackfs pseudo filesystem.
39 SMK_LOAD = 3, /* load policy */
40 SMK_CIPSO = 4, /* load label -> CIPSO mapping */
41 SMK_DOI = 5, /* CIPSO DOI */
42 SMK_DIRECT = 6, /* CIPSO level indicating direct label */
43 SMK_AMBIENT = 7, /* internet ambient label */
44 SMK_NET4ADDR = 8, /* single label hosts */
45 SMK_ONLYCAP = 9, /* the only "capable" label */
46 SMK_LOGGING = 10, /* logging */
47 SMK_LOAD_SELF = 11, /* task specific rules */
48 SMK_ACCESSES = 12, /* access policy */
49 SMK_MAPPED = 13, /* CIPSO level indicating mapped label */
50 SMK_LOAD2 = 14, /* load policy with long labels */
51 SMK_LOAD_SELF2 = 15, /* load task specific rules with long labels */
52 SMK_ACCESS2 = 16, /* make an access check with long labels */
53 SMK_CIPSO2 = 17, /* load long label -> CIPSO mapping */
54 SMK_REVOKE_SUBJ = 18, /* set rules with subject label to '-' */
55 SMK_CHANGE_RULE = 19, /* change or add rules (long labels) */
56 SMK_SYSLOG = 20, /* change syslog label) */
57 SMK_PTRACE = 21, /* set ptrace rule */
58 #ifdef CONFIG_SECURITY_SMACK_BRINGUP
59 SMK_UNCONFINED = 22, /* define an unconfined label */
61 #if IS_ENABLED(CONFIG_IPV6)
62 SMK_NET6ADDR = 23, /* single label IPv6 hosts */
63 #endif /* CONFIG_IPV6 */
64 SMK_RELABEL_SELF = 24, /* relabel possible without CAP_MAC_ADMIN */
70 static DEFINE_MUTEX(smack_cipso_lock);
71 static DEFINE_MUTEX(smack_ambient_lock);
72 static DEFINE_MUTEX(smk_net4addr_lock);
73 #if IS_ENABLED(CONFIG_IPV6)
74 static DEFINE_MUTEX(smk_net6addr_lock);
75 #endif /* CONFIG_IPV6 */
78 * This is the "ambient" label for network traffic.
79 * If it isn't somehow marked, use this.
80 * It can be reset via smackfs/ambient
82 struct smack_known *smack_net_ambient;
85 * This is the level in a CIPSO header that indicates a
86 * smack label is contained directly in the category set.
87 * It can be reset via smackfs/direct
89 int smack_cipso_direct = SMACK_CIPSO_DIRECT_DEFAULT;
92 * This is the level in a CIPSO header that indicates a
93 * secid is contained directly in the category set.
94 * It can be reset via smackfs/mapped
96 int smack_cipso_mapped = SMACK_CIPSO_MAPPED_DEFAULT;
98 #ifdef CONFIG_SECURITY_SMACK_BRINGUP
100 * Allow one label to be unconfined. This is for
101 * debugging and application bring-up purposes only.
102 * It is bad and wrong, but everyone seems to expect
105 struct smack_known *smack_unconfined;
109 * If this value is set restrict syslog use to the label specified.
110 * It can be reset via smackfs/syslog
112 struct smack_known *smack_syslog_label;
115 * Ptrace current rule
116 * SMACK_PTRACE_DEFAULT regular smack ptrace rules (/proc based)
117 * SMACK_PTRACE_EXACT labels must match, but can be overriden with
119 * SMACK_PTRACE_DRACONIAN lables must match, CAP_SYS_PTRACE has no effect
121 int smack_ptrace_rule = SMACK_PTRACE_DEFAULT;
124 * Certain IP addresses may be designated as single label hosts.
125 * Packets are sent there unlabeled, but only from tasks that
126 * can write to the specified label.
129 LIST_HEAD(smk_net4addr_list);
130 #if IS_ENABLED(CONFIG_IPV6)
131 LIST_HEAD(smk_net6addr_list);
132 #endif /* CONFIG_IPV6 */
135 * Rule lists are maintained for each label.
136 * This master list is just for reading /smack/load and /smack/load2.
138 struct smack_master_list {
139 struct list_head list;
140 struct smack_rule *smk_rule;
143 static LIST_HEAD(smack_rule_list);
145 struct smack_parsed_rule {
146 struct smack_known *smk_subject;
147 struct smack_known *smk_object;
152 static int smk_cipso_doi_value = SMACK_CIPSO_DOI_DEFAULT;
155 * Values for parsing cipso rules
156 * SMK_DIGITLEN: Length of a digit field in a rule.
157 * SMK_CIPSOMIN: Minimum possible cipso rule length.
158 * SMK_CIPSOMAX: Maximum possible cipso rule length.
160 #define SMK_DIGITLEN 4
161 #define SMK_CIPSOMIN (SMK_LABELLEN + 2 * SMK_DIGITLEN)
162 #define SMK_CIPSOMAX (SMK_CIPSOMIN + SMACK_CIPSO_MAXCATNUM * SMK_DIGITLEN)
165 * Values for parsing MAC rules
166 * SMK_ACCESS: Maximum possible combination of access permissions
167 * SMK_ACCESSLEN: Maximum length for a rule access field
168 * SMK_LOADLEN: Smack rule length
170 #define SMK_OACCESS "rwxa"
171 #define SMK_ACCESS "rwxatl"
172 #define SMK_OACCESSLEN (sizeof(SMK_OACCESS) - 1)
173 #define SMK_ACCESSLEN (sizeof(SMK_ACCESS) - 1)
174 #define SMK_OLOADLEN (SMK_LABELLEN + SMK_LABELLEN + SMK_OACCESSLEN)
175 #define SMK_LOADLEN (SMK_LABELLEN + SMK_LABELLEN + SMK_ACCESSLEN)
178 * Stricly for CIPSO level manipulation.
179 * Set the category bit number in a smack label sized buffer.
181 static inline void smack_catset_bit(unsigned int cat, char *catsetp)
183 if (cat == 0 || cat > (SMK_CIPSOLEN * 8))
186 catsetp[(cat - 1) / 8] |= 0x80 >> ((cat - 1) % 8);
190 * smk_netlabel_audit_set - fill a netlbl_audit struct
191 * @nap: structure to fill
193 static void smk_netlabel_audit_set(struct netlbl_audit *nap)
195 struct smack_known *skp = smk_of_current();
197 nap->loginuid = audit_get_loginuid(current);
198 nap->sessionid = audit_get_sessionid(current);
199 nap->secid = skp->smk_secid;
203 * Value for parsing single label host rules
206 #define SMK_NETLBLADDRMIN 9
209 * smk_set_access - add a rule to the rule list or replace an old rule
210 * @srp: the rule to add or replace
211 * @rule_list: the list of rules
212 * @rule_lock: the rule list lock
213 * @global: if non-zero, indicates a global rule
215 * Looks through the current subject/object/access list for
216 * the subject/object pair and replaces the access that was
217 * there. If the pair isn't found add it with the specified
220 * Returns 0 if nothing goes wrong or -ENOMEM if it fails
221 * during the allocation of the new pair to add.
223 static int smk_set_access(struct smack_parsed_rule *srp,
224 struct list_head *rule_list,
225 struct mutex *rule_lock, int global)
227 struct smack_rule *sp;
228 struct smack_master_list *smlp;
232 mutex_lock(rule_lock);
235 * Because the object label is less likely to match
236 * than the subject label check it first
238 list_for_each_entry_rcu(sp, rule_list, list) {
239 if (sp->smk_object == srp->smk_object &&
240 sp->smk_subject == srp->smk_subject) {
242 sp->smk_access |= srp->smk_access1;
243 sp->smk_access &= ~srp->smk_access2;
249 sp = kzalloc(sizeof(*sp), GFP_KERNEL);
255 sp->smk_subject = srp->smk_subject;
256 sp->smk_object = srp->smk_object;
257 sp->smk_access = srp->smk_access1 & ~srp->smk_access2;
259 list_add_rcu(&sp->list, rule_list);
261 * If this is a global as opposed to self and a new rule
262 * it needs to get added for reporting.
265 smlp = kzalloc(sizeof(*smlp), GFP_KERNEL);
268 list_add_rcu(&smlp->list, &smack_rule_list);
275 mutex_unlock(rule_lock);
280 * smk_perm_from_str - parse smack accesses from a text string
281 * @string: a text string that contains a Smack accesses code
283 * Returns an integer with respective bits set for specified accesses.
285 static int smk_perm_from_str(const char *string)
290 for (cp = string; ; cp++)
312 perm |= MAY_TRANSMUTE;
328 * smk_fill_rule - Fill Smack rule from strings
329 * @subject: subject label string
330 * @object: object label string
331 * @access1: access string
332 * @access2: string with permissions to be removed
334 * @import: if non-zero, import labels
335 * @len: label length limit
337 * Returns 0 on success, appropriate error code on failure.
339 static int smk_fill_rule(const char *subject, const char *object,
340 const char *access1, const char *access2,
341 struct smack_parsed_rule *rule, int import,
345 struct smack_known *skp;
348 rule->smk_subject = smk_import_entry(subject, len);
349 if (IS_ERR(rule->smk_subject))
350 return PTR_ERR(rule->smk_subject);
352 rule->smk_object = smk_import_entry(object, len);
353 if (IS_ERR(rule->smk_object))
354 return PTR_ERR(rule->smk_object);
356 cp = smk_parse_smack(subject, len);
359 skp = smk_find_entry(cp);
363 rule->smk_subject = skp;
365 cp = smk_parse_smack(object, len);
368 skp = smk_find_entry(cp);
372 rule->smk_object = skp;
375 rule->smk_access1 = smk_perm_from_str(access1);
377 rule->smk_access2 = smk_perm_from_str(access2);
379 rule->smk_access2 = ~rule->smk_access1;
385 * smk_parse_rule - parse Smack rule from load string
386 * @data: string to be parsed whose size is SMK_LOADLEN
388 * @import: if non-zero, import labels
390 * Returns 0 on success, -1 on errors.
392 static int smk_parse_rule(const char *data, struct smack_parsed_rule *rule,
397 rc = smk_fill_rule(data, data + SMK_LABELLEN,
398 data + SMK_LABELLEN + SMK_LABELLEN, NULL, rule,
399 import, SMK_LABELLEN);
404 * smk_parse_long_rule - parse Smack rule from rule string
405 * @data: string to be parsed, null terminated
406 * @rule: Will be filled with Smack parsed rule
407 * @import: if non-zero, import labels
408 * @tokens: numer of substrings expected in data
410 * Returns number of processed bytes on success, -ERRNO on failure.
412 static ssize_t smk_parse_long_rule(char *data, struct smack_parsed_rule *rule,
413 int import, int tokens)
421 * Parsing the rule in-place, filling all white-spaces with '\0'
423 for (i = 0; i < tokens; ++i) {
424 while (isspace(data[cnt]))
427 if (data[cnt] == '\0')
428 /* Unexpected end of data */
433 while (data[cnt] && !isspace(data[cnt]))
436 while (isspace(data[cnt]))
442 rc = smk_fill_rule(tok[0], tok[1], tok[2], tok[3], rule, import, 0);
443 return rc == 0 ? cnt : rc;
446 #define SMK_FIXED24_FMT 0 /* Fixed 24byte label format */
447 #define SMK_LONG_FMT 1 /* Variable long label format */
448 #define SMK_CHANGE_FMT 2 /* Rule modification format */
450 * smk_write_rules_list - write() for any /smack rule file
451 * @file: file pointer, not actually used
452 * @buf: where to get the data from
454 * @ppos: where to start - must be 0
455 * @rule_list: the list of rules to write to
456 * @rule_lock: lock for the rule list
457 * @format: /smack/load or /smack/load2 or /smack/change-rule format.
459 * Get one smack access rule from above.
460 * The format for SMK_LONG_FMT is:
461 * "subject<whitespace>object<whitespace>access[<whitespace>...]"
462 * The format for SMK_FIXED24_FMT is exactly:
463 * "subject object rwxat"
464 * The format for SMK_CHANGE_FMT is:
465 * "subject<whitespace>object<whitespace>
466 * acc_enable<whitespace>acc_disable[<whitespace>...]"
468 static ssize_t smk_write_rules_list(struct file *file, const char __user *buf,
469 size_t count, loff_t *ppos,
470 struct list_head *rule_list,
471 struct mutex *rule_lock, int format)
473 struct smack_parsed_rule rule;
482 * Enough data must be present.
487 if (format == SMK_FIXED24_FMT) {
489 * Minor hack for backward compatibility
491 if (count < SMK_OLOADLEN || count > SMK_LOADLEN)
494 if (count >= PAGE_SIZE) {
495 count = PAGE_SIZE - 1;
500 data = memdup_user_nul(buf, count);
502 return PTR_ERR(data);
505 * In case of parsing only part of user buf,
506 * avoid having partial rule at the data buffer
509 while (count > 0 && (data[count - 1] != '\n'))
518 tokens = (format == SMK_CHANGE_FMT ? 4 : 3);
519 while (cnt < count) {
520 if (format == SMK_FIXED24_FMT) {
521 rc = smk_parse_rule(data, &rule, 1);
526 rc = smk_parse_long_rule(data + cnt, &rule, 1, tokens);
536 if (rule_list == NULL)
537 rc = smk_set_access(&rule, &rule.smk_subject->smk_rules,
538 &rule.smk_subject->smk_rules_lock, 1);
540 rc = smk_set_access(&rule, rule_list, rule_lock, 0);
553 * Core logic for smackfs seq list operations.
556 static void *smk_seq_start(struct seq_file *s, loff_t *pos,
557 struct list_head *head)
559 struct list_head *list;
563 for (list = rcu_dereference(list_next_rcu(head));
565 list = rcu_dereference(list_next_rcu(list))) {
573 static void *smk_seq_next(struct seq_file *s, void *v, loff_t *pos,
574 struct list_head *head)
576 struct list_head *list = v;
579 list = rcu_dereference(list_next_rcu(list));
581 return (list == head) ? NULL : list;
584 static void smk_seq_stop(struct seq_file *s, void *v)
589 static void smk_rule_show(struct seq_file *s, struct smack_rule *srp, int max)
592 * Don't show any rules with label names too long for
593 * interface file (/smack/load or /smack/load2)
594 * because you should expect to be able to write
595 * anything you read back.
597 if (strlen(srp->smk_subject->smk_known) >= max ||
598 strlen(srp->smk_object->smk_known) >= max)
601 if (srp->smk_access == 0)
604 seq_printf(s, "%s %s",
605 srp->smk_subject->smk_known,
606 srp->smk_object->smk_known);
610 if (srp->smk_access & MAY_READ)
612 if (srp->smk_access & MAY_WRITE)
614 if (srp->smk_access & MAY_EXEC)
616 if (srp->smk_access & MAY_APPEND)
618 if (srp->smk_access & MAY_TRANSMUTE)
620 if (srp->smk_access & MAY_LOCK)
622 if (srp->smk_access & MAY_BRINGUP)
629 * Seq_file read operations for /smack/load
632 static void *load2_seq_start(struct seq_file *s, loff_t *pos)
634 return smk_seq_start(s, pos, &smack_rule_list);
637 static void *load2_seq_next(struct seq_file *s, void *v, loff_t *pos)
639 return smk_seq_next(s, v, pos, &smack_rule_list);
642 static int load_seq_show(struct seq_file *s, void *v)
644 struct list_head *list = v;
645 struct smack_master_list *smlp =
646 list_entry_rcu(list, struct smack_master_list, list);
648 smk_rule_show(s, smlp->smk_rule, SMK_LABELLEN);
653 static const struct seq_operations load_seq_ops = {
654 .start = load2_seq_start,
655 .next = load2_seq_next,
656 .show = load_seq_show,
657 .stop = smk_seq_stop,
661 * smk_open_load - open() for /smack/load
662 * @inode: inode structure representing file
663 * @file: "load" file pointer
665 * For reading, use load_seq_* seq_file reading operations.
667 static int smk_open_load(struct inode *inode, struct file *file)
669 return seq_open(file, &load_seq_ops);
673 * smk_write_load - write() for /smack/load
674 * @file: file pointer, not actually used
675 * @buf: where to get the data from
677 * @ppos: where to start - must be 0
680 static ssize_t smk_write_load(struct file *file, const char __user *buf,
681 size_t count, loff_t *ppos)
684 * Must have privilege.
686 * Enough data must be present.
688 if (!smack_privileged(CAP_MAC_ADMIN))
691 return smk_write_rules_list(file, buf, count, ppos, NULL, NULL,
695 static const struct file_operations smk_load_ops = {
696 .open = smk_open_load,
699 .write = smk_write_load,
700 .release = seq_release,
704 * smk_cipso_doi - initialize the CIPSO domain
706 static void smk_cipso_doi(void)
709 struct cipso_v4_doi *doip;
710 struct netlbl_audit nai;
712 smk_netlabel_audit_set(&nai);
714 rc = netlbl_cfg_map_del(NULL, PF_INET, NULL, NULL, &nai);
716 printk(KERN_WARNING "%s:%d remove rc = %d\n",
717 __func__, __LINE__, rc);
719 doip = kmalloc(sizeof(struct cipso_v4_doi), GFP_KERNEL);
721 panic("smack: Failed to initialize cipso DOI.\n");
722 doip->map.std = NULL;
723 doip->doi = smk_cipso_doi_value;
724 doip->type = CIPSO_V4_MAP_PASS;
725 doip->tags[0] = CIPSO_V4_TAG_RBITMAP;
726 for (rc = 1; rc < CIPSO_V4_TAG_MAXCNT; rc++)
727 doip->tags[rc] = CIPSO_V4_TAG_INVALID;
729 rc = netlbl_cfg_cipsov4_add(doip, &nai);
731 printk(KERN_WARNING "%s:%d cipso add rc = %d\n",
732 __func__, __LINE__, rc);
736 rc = netlbl_cfg_cipsov4_map_add(doip->doi, NULL, NULL, NULL, &nai);
738 printk(KERN_WARNING "%s:%d map add rc = %d\n",
739 __func__, __LINE__, rc);
746 * smk_unlbl_ambient - initialize the unlabeled domain
747 * @oldambient: previous domain string
749 static void smk_unlbl_ambient(char *oldambient)
752 struct netlbl_audit nai;
754 smk_netlabel_audit_set(&nai);
756 if (oldambient != NULL) {
757 rc = netlbl_cfg_map_del(oldambient, PF_INET, NULL, NULL, &nai);
759 printk(KERN_WARNING "%s:%d remove rc = %d\n",
760 __func__, __LINE__, rc);
762 if (smack_net_ambient == NULL)
763 smack_net_ambient = &smack_known_floor;
765 rc = netlbl_cfg_unlbl_map_add(smack_net_ambient->smk_known, PF_INET,
768 printk(KERN_WARNING "%s:%d add rc = %d\n",
769 __func__, __LINE__, rc);
773 * Seq_file read operations for /smack/cipso
776 static void *cipso_seq_start(struct seq_file *s, loff_t *pos)
778 return smk_seq_start(s, pos, &smack_known_list);
781 static void *cipso_seq_next(struct seq_file *s, void *v, loff_t *pos)
783 return smk_seq_next(s, v, pos, &smack_known_list);
787 * Print cipso labels in format:
788 * label level[/cat[,cat]]
790 static int cipso_seq_show(struct seq_file *s, void *v)
792 struct list_head *list = v;
793 struct smack_known *skp =
794 list_entry_rcu(list, struct smack_known, list);
795 struct netlbl_lsm_catmap *cmp = skp->smk_netlabel.attr.mls.cat;
800 * Don't show a label that could not have been set using
801 * /smack/cipso. This is in support of the notion that
802 * anything read from /smack/cipso ought to be writeable
805 * /smack/cipso2 should be used instead.
807 if (strlen(skp->smk_known) >= SMK_LABELLEN)
810 seq_printf(s, "%s %3d", skp->smk_known, skp->smk_netlabel.attr.mls.lvl);
812 for (i = netlbl_catmap_walk(cmp, 0); i >= 0;
813 i = netlbl_catmap_walk(cmp, i + 1)) {
814 seq_printf(s, "%c%d", sep, i);
823 static const struct seq_operations cipso_seq_ops = {
824 .start = cipso_seq_start,
825 .next = cipso_seq_next,
826 .show = cipso_seq_show,
827 .stop = smk_seq_stop,
831 * smk_open_cipso - open() for /smack/cipso
832 * @inode: inode structure representing file
833 * @file: "cipso" file pointer
835 * Connect our cipso_seq_* operations with /smack/cipso
838 static int smk_open_cipso(struct inode *inode, struct file *file)
840 return seq_open(file, &cipso_seq_ops);
844 * smk_set_cipso - do the work for write() for cipso and cipso2
845 * @file: file pointer, not actually used
846 * @buf: where to get the data from
848 * @ppos: where to start
849 * @format: /smack/cipso or /smack/cipso2
851 * Accepts only one cipso rule per write call.
852 * Returns number of bytes written or error code, as appropriate
854 static ssize_t smk_set_cipso(struct file *file, const char __user *buf,
855 size_t count, loff_t *ppos, int format)
857 struct smack_known *skp;
858 struct netlbl_lsm_secattr ncats;
859 char mapcatset[SMK_CIPSOLEN];
863 ssize_t rc = -EINVAL;
870 * Must have privilege.
872 * Enough data must be present.
874 if (!smack_privileged(CAP_MAC_ADMIN))
878 if (format == SMK_FIXED24_FMT &&
879 (count < SMK_CIPSOMIN || count > SMK_CIPSOMAX))
882 data = memdup_user_nul(buf, count);
884 return PTR_ERR(data);
888 * Only allow one writer at a time. Writes should be
889 * quite rare and small in any case.
891 mutex_lock(&smack_cipso_lock);
893 skp = smk_import_entry(rule, 0);
899 if (format == SMK_FIXED24_FMT)
900 rule += SMK_LABELLEN;
902 rule += strlen(skp->smk_known) + 1;
904 ret = sscanf(rule, "%d", &maplevel);
905 if (ret != 1 || maplevel > SMACK_CIPSO_MAXLEVEL)
908 rule += SMK_DIGITLEN;
909 ret = sscanf(rule, "%d", &catlen);
910 if (ret != 1 || catlen > SMACK_CIPSO_MAXCATNUM)
913 if (format == SMK_FIXED24_FMT &&
914 count != (SMK_CIPSOMIN + catlen * SMK_DIGITLEN))
917 memset(mapcatset, 0, sizeof(mapcatset));
919 for (i = 0; i < catlen; i++) {
920 rule += SMK_DIGITLEN;
921 ret = sscanf(rule, "%u", &cat);
922 if (ret != 1 || cat > SMACK_CIPSO_MAXCATNUM)
925 smack_catset_bit(cat, mapcatset);
928 rc = smk_netlbl_mls(maplevel, mapcatset, &ncats, SMK_CIPSOLEN);
930 netlbl_catmap_free(skp->smk_netlabel.attr.mls.cat);
931 skp->smk_netlabel.attr.mls.cat = ncats.attr.mls.cat;
932 skp->smk_netlabel.attr.mls.lvl = ncats.attr.mls.lvl;
937 mutex_unlock(&smack_cipso_lock);
943 * smk_write_cipso - write() for /smack/cipso
944 * @file: file pointer, not actually used
945 * @buf: where to get the data from
947 * @ppos: where to start
949 * Accepts only one cipso rule per write call.
950 * Returns number of bytes written or error code, as appropriate
952 static ssize_t smk_write_cipso(struct file *file, const char __user *buf,
953 size_t count, loff_t *ppos)
955 return smk_set_cipso(file, buf, count, ppos, SMK_FIXED24_FMT);
958 static const struct file_operations smk_cipso_ops = {
959 .open = smk_open_cipso,
962 .write = smk_write_cipso,
963 .release = seq_release,
967 * Seq_file read operations for /smack/cipso2
971 * Print cipso labels in format:
972 * label level[/cat[,cat]]
974 static int cipso2_seq_show(struct seq_file *s, void *v)
976 struct list_head *list = v;
977 struct smack_known *skp =
978 list_entry_rcu(list, struct smack_known, list);
979 struct netlbl_lsm_catmap *cmp = skp->smk_netlabel.attr.mls.cat;
983 seq_printf(s, "%s %3d", skp->smk_known, skp->smk_netlabel.attr.mls.lvl);
985 for (i = netlbl_catmap_walk(cmp, 0); i >= 0;
986 i = netlbl_catmap_walk(cmp, i + 1)) {
987 seq_printf(s, "%c%d", sep, i);
996 static const struct seq_operations cipso2_seq_ops = {
997 .start = cipso_seq_start,
998 .next = cipso_seq_next,
999 .show = cipso2_seq_show,
1000 .stop = smk_seq_stop,
1004 * smk_open_cipso2 - open() for /smack/cipso2
1005 * @inode: inode structure representing file
1006 * @file: "cipso2" file pointer
1008 * Connect our cipso_seq_* operations with /smack/cipso2
1011 static int smk_open_cipso2(struct inode *inode, struct file *file)
1013 return seq_open(file, &cipso2_seq_ops);
1017 * smk_write_cipso2 - write() for /smack/cipso2
1018 * @file: file pointer, not actually used
1019 * @buf: where to get the data from
1020 * @count: bytes sent
1021 * @ppos: where to start
1023 * Accepts only one cipso rule per write call.
1024 * Returns number of bytes written or error code, as appropriate
1026 static ssize_t smk_write_cipso2(struct file *file, const char __user *buf,
1027 size_t count, loff_t *ppos)
1029 return smk_set_cipso(file, buf, count, ppos, SMK_LONG_FMT);
1032 static const struct file_operations smk_cipso2_ops = {
1033 .open = smk_open_cipso2,
1035 .llseek = seq_lseek,
1036 .write = smk_write_cipso2,
1037 .release = seq_release,
1041 * Seq_file read operations for /smack/netlabel
1044 static void *net4addr_seq_start(struct seq_file *s, loff_t *pos)
1046 return smk_seq_start(s, pos, &smk_net4addr_list);
1049 static void *net4addr_seq_next(struct seq_file *s, void *v, loff_t *pos)
1051 return smk_seq_next(s, v, pos, &smk_net4addr_list);
1055 * Print host/label pairs
1057 static int net4addr_seq_show(struct seq_file *s, void *v)
1059 struct list_head *list = v;
1060 struct smk_net4addr *skp =
1061 list_entry_rcu(list, struct smk_net4addr, list);
1062 char *kp = SMACK_CIPSO_OPTION;
1064 if (skp->smk_label != NULL)
1065 kp = skp->smk_label->smk_known;
1066 seq_printf(s, "%pI4/%d %s\n", &skp->smk_host.s_addr,
1067 skp->smk_masks, kp);
1072 static const struct seq_operations net4addr_seq_ops = {
1073 .start = net4addr_seq_start,
1074 .next = net4addr_seq_next,
1075 .show = net4addr_seq_show,
1076 .stop = smk_seq_stop,
1080 * smk_open_net4addr - open() for /smack/netlabel
1081 * @inode: inode structure representing file
1082 * @file: "netlabel" file pointer
1084 * Connect our net4addr_seq_* operations with /smack/netlabel
1087 static int smk_open_net4addr(struct inode *inode, struct file *file)
1089 return seq_open(file, &net4addr_seq_ops);
1093 * smk_net4addr_insert
1094 * @new : netlabel to insert
1096 * This helper insert netlabel in the smack_net4addrs list
1097 * sorted by netmask length (longest to smallest)
1098 * locked by &smk_net4addr_lock in smk_write_net4addr
1101 static void smk_net4addr_insert(struct smk_net4addr *new)
1103 struct smk_net4addr *m;
1104 struct smk_net4addr *m_next;
1106 if (list_empty(&smk_net4addr_list)) {
1107 list_add_rcu(&new->list, &smk_net4addr_list);
1111 m = list_entry_rcu(smk_net4addr_list.next,
1112 struct smk_net4addr, list);
1114 /* the comparison '>' is a bit hacky, but works */
1115 if (new->smk_masks > m->smk_masks) {
1116 list_add_rcu(&new->list, &smk_net4addr_list);
1120 list_for_each_entry_rcu(m, &smk_net4addr_list, list) {
1121 if (list_is_last(&m->list, &smk_net4addr_list)) {
1122 list_add_rcu(&new->list, &m->list);
1125 m_next = list_entry_rcu(m->list.next,
1126 struct smk_net4addr, list);
1127 if (new->smk_masks > m_next->smk_masks) {
1128 list_add_rcu(&new->list, &m->list);
1136 * smk_write_net4addr - write() for /smack/netlabel
1137 * @file: file pointer, not actually used
1138 * @buf: where to get the data from
1139 * @count: bytes sent
1140 * @ppos: where to start
1142 * Accepts only one net4addr per write call.
1143 * Returns number of bytes written or error code, as appropriate
1145 static ssize_t smk_write_net4addr(struct file *file, const char __user *buf,
1146 size_t count, loff_t *ppos)
1148 struct smk_net4addr *snp;
1149 struct sockaddr_in newname;
1151 struct smack_known *skp = NULL;
1153 char *host = (char *)&newname.sin_addr.s_addr;
1155 struct netlbl_audit audit_info;
1156 struct in_addr mask;
1160 u32 mask_bits = (1<<31);
1165 * Must have privilege.
1166 * No partial writes.
1167 * Enough data must be present.
1168 * "<addr/mask, as a.b.c.d/e><space><label>"
1169 * "<addr, as a.b.c.d><space><label>"
1171 if (!smack_privileged(CAP_MAC_ADMIN))
1175 if (count < SMK_NETLBLADDRMIN)
1178 data = memdup_user_nul(buf, count);
1180 return PTR_ERR(data);
1182 smack = kzalloc(count + 1, GFP_KERNEL);
1183 if (smack == NULL) {
1188 rc = sscanf(data, "%hhd.%hhd.%hhd.%hhd/%u %s",
1189 &host[0], &host[1], &host[2], &host[3], &masks, smack);
1191 rc = sscanf(data, "%hhd.%hhd.%hhd.%hhd %s",
1192 &host[0], &host[1], &host[2], &host[3], smack);
1200 if (masks > BEBITS) {
1206 * If smack begins with '-', it is an option, don't import it
1208 if (smack[0] != '-') {
1209 skp = smk_import_entry(smack, 0);
1216 * Only the -CIPSO option is supported for IPv4
1218 if (strcmp(smack, SMACK_CIPSO_OPTION) != 0) {
1224 for (m = masks, temp_mask = 0; m > 0; m--) {
1225 temp_mask |= mask_bits;
1228 mask.s_addr = cpu_to_be32(temp_mask);
1230 newname.sin_addr.s_addr &= mask.s_addr;
1232 * Only allow one writer at a time. Writes should be
1233 * quite rare and small in any case.
1235 mutex_lock(&smk_net4addr_lock);
1237 nsa = newname.sin_addr.s_addr;
1238 /* try to find if the prefix is already in the list */
1240 list_for_each_entry_rcu(snp, &smk_net4addr_list, list) {
1241 if (snp->smk_host.s_addr == nsa && snp->smk_masks == masks) {
1246 smk_netlabel_audit_set(&audit_info);
1249 snp = kzalloc(sizeof(*snp), GFP_KERNEL);
1254 snp->smk_host.s_addr = newname.sin_addr.s_addr;
1255 snp->smk_mask.s_addr = mask.s_addr;
1256 snp->smk_label = skp;
1257 snp->smk_masks = masks;
1258 smk_net4addr_insert(snp);
1262 * Delete the unlabeled entry, only if the previous label
1263 * wasn't the special CIPSO option
1265 if (snp->smk_label != NULL)
1266 rc = netlbl_cfg_unlbl_static_del(&init_net, NULL,
1267 &snp->smk_host, &snp->smk_mask,
1268 PF_INET, &audit_info);
1271 snp->smk_label = skp;
1275 * Now tell netlabel about the single label nature of
1276 * this host so that incoming packets get labeled.
1277 * but only if we didn't get the special CIPSO option
1279 if (rc == 0 && skp != NULL)
1280 rc = netlbl_cfg_unlbl_static_add(&init_net, NULL,
1281 &snp->smk_host, &snp->smk_mask, PF_INET,
1282 snp->smk_label->smk_secid, &audit_info);
1287 mutex_unlock(&smk_net4addr_lock);
1297 static const struct file_operations smk_net4addr_ops = {
1298 .open = smk_open_net4addr,
1300 .llseek = seq_lseek,
1301 .write = smk_write_net4addr,
1302 .release = seq_release,
1305 #if IS_ENABLED(CONFIG_IPV6)
1307 * Seq_file read operations for /smack/netlabel6
1310 static void *net6addr_seq_start(struct seq_file *s, loff_t *pos)
1312 return smk_seq_start(s, pos, &smk_net6addr_list);
1315 static void *net6addr_seq_next(struct seq_file *s, void *v, loff_t *pos)
1317 return smk_seq_next(s, v, pos, &smk_net6addr_list);
1321 * Print host/label pairs
1323 static int net6addr_seq_show(struct seq_file *s, void *v)
1325 struct list_head *list = v;
1326 struct smk_net6addr *skp =
1327 list_entry(list, struct smk_net6addr, list);
1329 if (skp->smk_label != NULL)
1330 seq_printf(s, "%pI6/%d %s\n", &skp->smk_host, skp->smk_masks,
1331 skp->smk_label->smk_known);
1336 static const struct seq_operations net6addr_seq_ops = {
1337 .start = net6addr_seq_start,
1338 .next = net6addr_seq_next,
1339 .show = net6addr_seq_show,
1340 .stop = smk_seq_stop,
1344 * smk_open_net6addr - open() for /smack/netlabel
1345 * @inode: inode structure representing file
1346 * @file: "netlabel" file pointer
1348 * Connect our net6addr_seq_* operations with /smack/netlabel
1351 static int smk_open_net6addr(struct inode *inode, struct file *file)
1353 return seq_open(file, &net6addr_seq_ops);
1357 * smk_net6addr_insert
1358 * @new : entry to insert
1360 * This inserts an entry in the smack_net6addrs list
1361 * sorted by netmask length (longest to smallest)
1362 * locked by &smk_net6addr_lock in smk_write_net6addr
1365 static void smk_net6addr_insert(struct smk_net6addr *new)
1367 struct smk_net6addr *m_next;
1368 struct smk_net6addr *m;
1370 if (list_empty(&smk_net6addr_list)) {
1371 list_add_rcu(&new->list, &smk_net6addr_list);
1375 m = list_entry_rcu(smk_net6addr_list.next,
1376 struct smk_net6addr, list);
1378 if (new->smk_masks > m->smk_masks) {
1379 list_add_rcu(&new->list, &smk_net6addr_list);
1383 list_for_each_entry_rcu(m, &smk_net6addr_list, list) {
1384 if (list_is_last(&m->list, &smk_net6addr_list)) {
1385 list_add_rcu(&new->list, &m->list);
1388 m_next = list_entry_rcu(m->list.next,
1389 struct smk_net6addr, list);
1390 if (new->smk_masks > m_next->smk_masks) {
1391 list_add_rcu(&new->list, &m->list);
1399 * smk_write_net6addr - write() for /smack/netlabel
1400 * @file: file pointer, not actually used
1401 * @buf: where to get the data from
1402 * @count: bytes sent
1403 * @ppos: where to start
1405 * Accepts only one net6addr per write call.
1406 * Returns number of bytes written or error code, as appropriate
1408 static ssize_t smk_write_net6addr(struct file *file, const char __user *buf,
1409 size_t count, loff_t *ppos)
1411 struct smk_net6addr *snp;
1412 struct in6_addr newname;
1413 struct in6_addr fullmask;
1414 struct smack_known *skp = NULL;
1420 unsigned int scanned[8];
1422 unsigned int mask = 128;
1425 * Must have privilege.
1426 * No partial writes.
1427 * Enough data must be present.
1428 * "<addr/mask, as a:b:c:d:e:f:g:h/e><space><label>"
1429 * "<addr, as a:b:c:d:e:f:g:h><space><label>"
1431 if (!smack_privileged(CAP_MAC_ADMIN))
1435 if (count < SMK_NETLBLADDRMIN)
1438 data = memdup_user_nul(buf, count);
1440 return PTR_ERR(data);
1442 smack = kzalloc(count + 1, GFP_KERNEL);
1443 if (smack == NULL) {
1448 i = sscanf(data, "%x:%x:%x:%x:%x:%x:%x:%x/%u %s",
1449 &scanned[0], &scanned[1], &scanned[2], &scanned[3],
1450 &scanned[4], &scanned[5], &scanned[6], &scanned[7],
1453 i = sscanf(data, "%x:%x:%x:%x:%x:%x:%x:%x %s",
1454 &scanned[0], &scanned[1], &scanned[2],
1455 &scanned[3], &scanned[4], &scanned[5],
1456 &scanned[6], &scanned[7], smack);
1466 for (i = 0; i < 8; i++) {
1467 if (scanned[i] > 0xffff) {
1471 newname.s6_addr16[i] = htons(scanned[i]);
1475 * If smack begins with '-', it is an option, don't import it
1477 if (smack[0] != '-') {
1478 skp = smk_import_entry(smack, 0);
1485 * Only -DELETE is supported for IPv6
1487 if (strcmp(smack, SMACK_DELETE_OPTION) != 0) {
1493 for (i = 0, m = mask; i < 8; i++) {
1495 fullmask.s6_addr16[i] = 0xffff;
1498 fullmask.s6_addr16[i] = (1 << m) - 1;
1501 fullmask.s6_addr16[i] = 0;
1502 newname.s6_addr16[i] &= fullmask.s6_addr16[i];
1506 * Only allow one writer at a time. Writes should be
1507 * quite rare and small in any case.
1509 mutex_lock(&smk_net6addr_lock);
1511 * Try to find the prefix in the list
1513 list_for_each_entry_rcu(snp, &smk_net6addr_list, list) {
1514 if (mask != snp->smk_masks)
1516 for (found = 1, i = 0; i < 8; i++) {
1517 if (newname.s6_addr16[i] !=
1518 snp->smk_host.s6_addr16[i]) {
1527 snp = kzalloc(sizeof(*snp), GFP_KERNEL);
1531 snp->smk_host = newname;
1532 snp->smk_mask = fullmask;
1533 snp->smk_masks = mask;
1534 snp->smk_label = skp;
1535 smk_net6addr_insert(snp);
1538 snp->smk_label = skp;
1544 mutex_unlock(&smk_net6addr_lock);
1554 static const struct file_operations smk_net6addr_ops = {
1555 .open = smk_open_net6addr,
1557 .llseek = seq_lseek,
1558 .write = smk_write_net6addr,
1559 .release = seq_release,
1561 #endif /* CONFIG_IPV6 */
1564 * smk_read_doi - read() for /smack/doi
1565 * @filp: file pointer, not actually used
1566 * @buf: where to put the result
1567 * @count: maximum to send along
1568 * @ppos: where to start
1570 * Returns number of bytes read or error code, as appropriate
1572 static ssize_t smk_read_doi(struct file *filp, char __user *buf,
1573 size_t count, loff_t *ppos)
1581 sprintf(temp, "%d", smk_cipso_doi_value);
1582 rc = simple_read_from_buffer(buf, count, ppos, temp, strlen(temp));
1588 * smk_write_doi - write() for /smack/doi
1589 * @file: file pointer, not actually used
1590 * @buf: where to get the data from
1591 * @count: bytes sent
1592 * @ppos: where to start
1594 * Returns number of bytes written or error code, as appropriate
1596 static ssize_t smk_write_doi(struct file *file, const char __user *buf,
1597 size_t count, loff_t *ppos)
1602 if (!smack_privileged(CAP_MAC_ADMIN))
1605 if (count >= sizeof(temp) || count == 0)
1608 if (copy_from_user(temp, buf, count) != 0)
1613 if (sscanf(temp, "%d", &i) != 1)
1616 smk_cipso_doi_value = i;
1623 static const struct file_operations smk_doi_ops = {
1624 .read = smk_read_doi,
1625 .write = smk_write_doi,
1626 .llseek = default_llseek,
1630 * smk_read_direct - read() for /smack/direct
1631 * @filp: file pointer, not actually used
1632 * @buf: where to put the result
1633 * @count: maximum to send along
1634 * @ppos: where to start
1636 * Returns number of bytes read or error code, as appropriate
1638 static ssize_t smk_read_direct(struct file *filp, char __user *buf,
1639 size_t count, loff_t *ppos)
1647 sprintf(temp, "%d", smack_cipso_direct);
1648 rc = simple_read_from_buffer(buf, count, ppos, temp, strlen(temp));
1654 * smk_write_direct - write() for /smack/direct
1655 * @file: file pointer, not actually used
1656 * @buf: where to get the data from
1657 * @count: bytes sent
1658 * @ppos: where to start
1660 * Returns number of bytes written or error code, as appropriate
1662 static ssize_t smk_write_direct(struct file *file, const char __user *buf,
1663 size_t count, loff_t *ppos)
1665 struct smack_known *skp;
1669 if (!smack_privileged(CAP_MAC_ADMIN))
1672 if (count >= sizeof(temp) || count == 0)
1675 if (copy_from_user(temp, buf, count) != 0)
1680 if (sscanf(temp, "%d", &i) != 1)
1684 * Don't do anything if the value hasn't actually changed.
1685 * If it is changing reset the level on entries that were
1686 * set up to be direct when they were created.
1688 if (smack_cipso_direct != i) {
1689 mutex_lock(&smack_known_lock);
1690 list_for_each_entry_rcu(skp, &smack_known_list, list)
1691 if (skp->smk_netlabel.attr.mls.lvl ==
1693 skp->smk_netlabel.attr.mls.lvl = i;
1694 smack_cipso_direct = i;
1695 mutex_unlock(&smack_known_lock);
1701 static const struct file_operations smk_direct_ops = {
1702 .read = smk_read_direct,
1703 .write = smk_write_direct,
1704 .llseek = default_llseek,
1708 * smk_read_mapped - read() for /smack/mapped
1709 * @filp: file pointer, not actually used
1710 * @buf: where to put the result
1711 * @count: maximum to send along
1712 * @ppos: where to start
1714 * Returns number of bytes read or error code, as appropriate
1716 static ssize_t smk_read_mapped(struct file *filp, char __user *buf,
1717 size_t count, loff_t *ppos)
1725 sprintf(temp, "%d", smack_cipso_mapped);
1726 rc = simple_read_from_buffer(buf, count, ppos, temp, strlen(temp));
1732 * smk_write_mapped - write() for /smack/mapped
1733 * @file: file pointer, not actually used
1734 * @buf: where to get the data from
1735 * @count: bytes sent
1736 * @ppos: where to start
1738 * Returns number of bytes written or error code, as appropriate
1740 static ssize_t smk_write_mapped(struct file *file, const char __user *buf,
1741 size_t count, loff_t *ppos)
1743 struct smack_known *skp;
1747 if (!smack_privileged(CAP_MAC_ADMIN))
1750 if (count >= sizeof(temp) || count == 0)
1753 if (copy_from_user(temp, buf, count) != 0)
1758 if (sscanf(temp, "%d", &i) != 1)
1762 * Don't do anything if the value hasn't actually changed.
1763 * If it is changing reset the level on entries that were
1764 * set up to be mapped when they were created.
1766 if (smack_cipso_mapped != i) {
1767 mutex_lock(&smack_known_lock);
1768 list_for_each_entry_rcu(skp, &smack_known_list, list)
1769 if (skp->smk_netlabel.attr.mls.lvl ==
1771 skp->smk_netlabel.attr.mls.lvl = i;
1772 smack_cipso_mapped = i;
1773 mutex_unlock(&smack_known_lock);
1779 static const struct file_operations smk_mapped_ops = {
1780 .read = smk_read_mapped,
1781 .write = smk_write_mapped,
1782 .llseek = default_llseek,
1786 * smk_read_ambient - read() for /smack/ambient
1787 * @filp: file pointer, not actually used
1788 * @buf: where to put the result
1789 * @cn: maximum to send along
1790 * @ppos: where to start
1792 * Returns number of bytes read or error code, as appropriate
1794 static ssize_t smk_read_ambient(struct file *filp, char __user *buf,
1795 size_t cn, loff_t *ppos)
1803 * Being careful to avoid a problem in the case where
1804 * smack_net_ambient gets changed in midstream.
1806 mutex_lock(&smack_ambient_lock);
1808 asize = strlen(smack_net_ambient->smk_known) + 1;
1811 rc = simple_read_from_buffer(buf, cn, ppos,
1812 smack_net_ambient->smk_known,
1817 mutex_unlock(&smack_ambient_lock);
1823 * smk_write_ambient - write() for /smack/ambient
1824 * @file: file pointer, not actually used
1825 * @buf: where to get the data from
1826 * @count: bytes sent
1827 * @ppos: where to start
1829 * Returns number of bytes written or error code, as appropriate
1831 static ssize_t smk_write_ambient(struct file *file, const char __user *buf,
1832 size_t count, loff_t *ppos)
1834 struct smack_known *skp;
1839 if (!smack_privileged(CAP_MAC_ADMIN))
1842 data = memdup_user_nul(buf, count);
1844 return PTR_ERR(data);
1846 skp = smk_import_entry(data, count);
1852 mutex_lock(&smack_ambient_lock);
1854 oldambient = smack_net_ambient->smk_known;
1855 smack_net_ambient = skp;
1856 smk_unlbl_ambient(oldambient);
1858 mutex_unlock(&smack_ambient_lock);
1865 static const struct file_operations smk_ambient_ops = {
1866 .read = smk_read_ambient,
1867 .write = smk_write_ambient,
1868 .llseek = default_llseek,
1872 * Seq_file operations for /smack/onlycap
1874 static void *onlycap_seq_start(struct seq_file *s, loff_t *pos)
1876 return smk_seq_start(s, pos, &smack_onlycap_list);
1879 static void *onlycap_seq_next(struct seq_file *s, void *v, loff_t *pos)
1881 return smk_seq_next(s, v, pos, &smack_onlycap_list);
1884 static int onlycap_seq_show(struct seq_file *s, void *v)
1886 struct list_head *list = v;
1887 struct smack_known_list_elem *sklep =
1888 list_entry_rcu(list, struct smack_known_list_elem, list);
1890 seq_puts(s, sklep->smk_label->smk_known);
1896 static const struct seq_operations onlycap_seq_ops = {
1897 .start = onlycap_seq_start,
1898 .next = onlycap_seq_next,
1899 .show = onlycap_seq_show,
1900 .stop = smk_seq_stop,
1903 static int smk_open_onlycap(struct inode *inode, struct file *file)
1905 return seq_open(file, &onlycap_seq_ops);
1909 * smk_list_swap_rcu - swap public list with a private one in RCU-safe way
1910 * The caller must hold appropriate mutex to prevent concurrent modifications
1911 * to the public list.
1912 * Private list is assumed to be not accessible to other threads yet.
1914 * @public: public list
1915 * @private: private list
1917 static void smk_list_swap_rcu(struct list_head *public,
1918 struct list_head *private)
1920 struct list_head *first, *last;
1922 if (list_empty(public)) {
1923 list_splice_init_rcu(private, public, synchronize_rcu);
1925 /* Remember public list before replacing it */
1926 first = public->next;
1927 last = public->prev;
1929 /* Publish private list in place of public in RCU-safe way */
1930 private->prev->next = public;
1931 private->next->prev = public;
1932 rcu_assign_pointer(public->next, private->next);
1933 public->prev = private->prev;
1937 /* When all readers are done with the old public list,
1938 * attach it in place of private */
1939 private->next = first;
1940 private->prev = last;
1941 first->prev = private;
1942 last->next = private;
1947 * smk_parse_label_list - parse list of Smack labels, separated by spaces
1949 * @data: the string to parse
1950 * @private: destination list
1952 * Returns zero on success or error code, as appropriate
1954 static int smk_parse_label_list(char *data, struct list_head *list)
1957 struct smack_known *skp;
1958 struct smack_known_list_elem *sklep;
1960 while ((tok = strsep(&data, " ")) != NULL) {
1964 skp = smk_import_entry(tok, 0);
1966 return PTR_ERR(skp);
1968 sklep = kzalloc(sizeof(*sklep), GFP_KERNEL);
1972 sklep->smk_label = skp;
1973 list_add(&sklep->list, list);
1980 * smk_destroy_label_list - destroy a list of smack_known_list_elem
1981 * @head: header pointer of the list to destroy
1983 void smk_destroy_label_list(struct list_head *list)
1985 struct smack_known_list_elem *sklep;
1986 struct smack_known_list_elem *sklep2;
1988 list_for_each_entry_safe(sklep, sklep2, list, list)
1991 INIT_LIST_HEAD(list);
1995 * smk_write_onlycap - write() for smackfs/onlycap
1996 * @file: file pointer, not actually used
1997 * @buf: where to get the data from
1998 * @count: bytes sent
1999 * @ppos: where to start
2001 * Returns number of bytes written or error code, as appropriate
2003 static ssize_t smk_write_onlycap(struct file *file, const char __user *buf,
2004 size_t count, loff_t *ppos)
2007 LIST_HEAD(list_tmp);
2010 if (!smack_privileged(CAP_MAC_ADMIN))
2013 data = memdup_user_nul(buf, count);
2015 return PTR_ERR(data);
2017 rc = smk_parse_label_list(data, &list_tmp);
2021 * Clear the smack_onlycap on invalid label errors. This means
2022 * that we can pass a null string to unset the onlycap value.
2024 * Importing will also reject a label beginning with '-',
2025 * so "-usecapabilities" will also work.
2027 * But do so only on invalid label, not on system errors.
2028 * The invalid label must be first to count as clearing attempt.
2030 if (!rc || (rc == -EINVAL && list_empty(&list_tmp))) {
2031 mutex_lock(&smack_onlycap_lock);
2032 smk_list_swap_rcu(&smack_onlycap_list, &list_tmp);
2033 mutex_unlock(&smack_onlycap_lock);
2037 smk_destroy_label_list(&list_tmp);
2042 static const struct file_operations smk_onlycap_ops = {
2043 .open = smk_open_onlycap,
2045 .write = smk_write_onlycap,
2046 .llseek = seq_lseek,
2047 .release = seq_release,
2050 #ifdef CONFIG_SECURITY_SMACK_BRINGUP
2052 * smk_read_unconfined - read() for smackfs/unconfined
2053 * @filp: file pointer, not actually used
2054 * @buf: where to put the result
2055 * @cn: maximum to send along
2056 * @ppos: where to start
2058 * Returns number of bytes read or error code, as appropriate
2060 static ssize_t smk_read_unconfined(struct file *filp, char __user *buf,
2061 size_t cn, loff_t *ppos)
2064 ssize_t rc = -EINVAL;
2070 if (smack_unconfined != NULL)
2071 smack = smack_unconfined->smk_known;
2073 asize = strlen(smack) + 1;
2076 rc = simple_read_from_buffer(buf, cn, ppos, smack, asize);
2082 * smk_write_unconfined - write() for smackfs/unconfined
2083 * @file: file pointer, not actually used
2084 * @buf: where to get the data from
2085 * @count: bytes sent
2086 * @ppos: where to start
2088 * Returns number of bytes written or error code, as appropriate
2090 static ssize_t smk_write_unconfined(struct file *file, const char __user *buf,
2091 size_t count, loff_t *ppos)
2094 struct smack_known *skp;
2097 if (!smack_privileged(CAP_MAC_ADMIN))
2100 data = memdup_user_nul(buf, count);
2102 return PTR_ERR(data);
2105 * Clear the smack_unconfined on invalid label errors. This means
2106 * that we can pass a null string to unset the unconfined value.
2108 * Importing will also reject a label beginning with '-',
2109 * so "-confine" will also work.
2111 * But do so only on invalid label, not on system errors.
2113 skp = smk_import_entry(data, count);
2114 if (PTR_ERR(skp) == -EINVAL)
2116 else if (IS_ERR(skp)) {
2121 smack_unconfined = skp;
2128 static const struct file_operations smk_unconfined_ops = {
2129 .read = smk_read_unconfined,
2130 .write = smk_write_unconfined,
2131 .llseek = default_llseek,
2133 #endif /* CONFIG_SECURITY_SMACK_BRINGUP */
2136 * smk_read_logging - read() for /smack/logging
2137 * @filp: file pointer, not actually used
2138 * @buf: where to put the result
2139 * @cn: maximum to send along
2140 * @ppos: where to start
2142 * Returns number of bytes read or error code, as appropriate
2144 static ssize_t smk_read_logging(struct file *filp, char __user *buf,
2145 size_t count, loff_t *ppos)
2153 sprintf(temp, "%d\n", log_policy);
2154 rc = simple_read_from_buffer(buf, count, ppos, temp, strlen(temp));
2159 * smk_write_logging - write() for /smack/logging
2160 * @file: file pointer, not actually used
2161 * @buf: where to get the data from
2162 * @count: bytes sent
2163 * @ppos: where to start
2165 * Returns number of bytes written or error code, as appropriate
2167 static ssize_t smk_write_logging(struct file *file, const char __user *buf,
2168 size_t count, loff_t *ppos)
2173 if (!smack_privileged(CAP_MAC_ADMIN))
2176 if (count >= sizeof(temp) || count == 0)
2179 if (copy_from_user(temp, buf, count) != 0)
2184 if (sscanf(temp, "%d", &i) != 1)
2194 static const struct file_operations smk_logging_ops = {
2195 .read = smk_read_logging,
2196 .write = smk_write_logging,
2197 .llseek = default_llseek,
2201 * Seq_file read operations for /smack/load-self
2204 static void *load_self_seq_start(struct seq_file *s, loff_t *pos)
2206 struct task_smack *tsp = current_security();
2208 return smk_seq_start(s, pos, &tsp->smk_rules);
2211 static void *load_self_seq_next(struct seq_file *s, void *v, loff_t *pos)
2213 struct task_smack *tsp = current_security();
2215 return smk_seq_next(s, v, pos, &tsp->smk_rules);
2218 static int load_self_seq_show(struct seq_file *s, void *v)
2220 struct list_head *list = v;
2221 struct smack_rule *srp =
2222 list_entry_rcu(list, struct smack_rule, list);
2224 smk_rule_show(s, srp, SMK_LABELLEN);
2229 static const struct seq_operations load_self_seq_ops = {
2230 .start = load_self_seq_start,
2231 .next = load_self_seq_next,
2232 .show = load_self_seq_show,
2233 .stop = smk_seq_stop,
2238 * smk_open_load_self - open() for /smack/load-self2
2239 * @inode: inode structure representing file
2240 * @file: "load" file pointer
2242 * For reading, use load_seq_* seq_file reading operations.
2244 static int smk_open_load_self(struct inode *inode, struct file *file)
2246 return seq_open(file, &load_self_seq_ops);
2250 * smk_write_load_self - write() for /smack/load-self
2251 * @file: file pointer, not actually used
2252 * @buf: where to get the data from
2253 * @count: bytes sent
2254 * @ppos: where to start - must be 0
2257 static ssize_t smk_write_load_self(struct file *file, const char __user *buf,
2258 size_t count, loff_t *ppos)
2260 struct task_smack *tsp = current_security();
2262 return smk_write_rules_list(file, buf, count, ppos, &tsp->smk_rules,
2263 &tsp->smk_rules_lock, SMK_FIXED24_FMT);
2266 static const struct file_operations smk_load_self_ops = {
2267 .open = smk_open_load_self,
2269 .llseek = seq_lseek,
2270 .write = smk_write_load_self,
2271 .release = seq_release,
2275 * smk_user_access - handle access check transaction
2276 * @file: file pointer
2277 * @buf: data from user space
2278 * @count: bytes sent
2279 * @ppos: where to start - must be 0
2281 static ssize_t smk_user_access(struct file *file, const char __user *buf,
2282 size_t count, loff_t *ppos, int format)
2284 struct smack_parsed_rule rule;
2288 data = simple_transaction_get(file, buf, count);
2290 return PTR_ERR(data);
2292 if (format == SMK_FIXED24_FMT) {
2293 if (count < SMK_LOADLEN)
2295 res = smk_parse_rule(data, &rule, 0);
2298 * simple_transaction_get() returns null-terminated data
2300 res = smk_parse_long_rule(data, &rule, 0, 3);
2304 res = smk_access(rule.smk_subject, rule.smk_object,
2305 rule.smk_access1, NULL);
2306 else if (res != -ENOENT)
2310 * smk_access() can return a value > 0 in the "bringup" case.
2312 data[0] = res >= 0 ? '1' : '0';
2315 simple_transaction_set(file, 2);
2317 if (format == SMK_FIXED24_FMT)
2323 * smk_write_access - handle access check transaction
2324 * @file: file pointer
2325 * @buf: data from user space
2326 * @count: bytes sent
2327 * @ppos: where to start - must be 0
2329 static ssize_t smk_write_access(struct file *file, const char __user *buf,
2330 size_t count, loff_t *ppos)
2332 return smk_user_access(file, buf, count, ppos, SMK_FIXED24_FMT);
2335 static const struct file_operations smk_access_ops = {
2336 .write = smk_write_access,
2337 .read = simple_transaction_read,
2338 .release = simple_transaction_release,
2339 .llseek = generic_file_llseek,
2344 * Seq_file read operations for /smack/load2
2347 static int load2_seq_show(struct seq_file *s, void *v)
2349 struct list_head *list = v;
2350 struct smack_master_list *smlp =
2351 list_entry_rcu(list, struct smack_master_list, list);
2353 smk_rule_show(s, smlp->smk_rule, SMK_LONGLABEL);
2358 static const struct seq_operations load2_seq_ops = {
2359 .start = load2_seq_start,
2360 .next = load2_seq_next,
2361 .show = load2_seq_show,
2362 .stop = smk_seq_stop,
2366 * smk_open_load2 - open() for /smack/load2
2367 * @inode: inode structure representing file
2368 * @file: "load2" file pointer
2370 * For reading, use load2_seq_* seq_file reading operations.
2372 static int smk_open_load2(struct inode *inode, struct file *file)
2374 return seq_open(file, &load2_seq_ops);
2378 * smk_write_load2 - write() for /smack/load2
2379 * @file: file pointer, not actually used
2380 * @buf: where to get the data from
2381 * @count: bytes sent
2382 * @ppos: where to start - must be 0
2385 static ssize_t smk_write_load2(struct file *file, const char __user *buf,
2386 size_t count, loff_t *ppos)
2389 * Must have privilege.
2391 if (!smack_privileged(CAP_MAC_ADMIN))
2394 return smk_write_rules_list(file, buf, count, ppos, NULL, NULL,
2398 static const struct file_operations smk_load2_ops = {
2399 .open = smk_open_load2,
2401 .llseek = seq_lseek,
2402 .write = smk_write_load2,
2403 .release = seq_release,
2407 * Seq_file read operations for /smack/load-self2
2410 static void *load_self2_seq_start(struct seq_file *s, loff_t *pos)
2412 struct task_smack *tsp = current_security();
2414 return smk_seq_start(s, pos, &tsp->smk_rules);
2417 static void *load_self2_seq_next(struct seq_file *s, void *v, loff_t *pos)
2419 struct task_smack *tsp = current_security();
2421 return smk_seq_next(s, v, pos, &tsp->smk_rules);
2424 static int load_self2_seq_show(struct seq_file *s, void *v)
2426 struct list_head *list = v;
2427 struct smack_rule *srp =
2428 list_entry_rcu(list, struct smack_rule, list);
2430 smk_rule_show(s, srp, SMK_LONGLABEL);
2435 static const struct seq_operations load_self2_seq_ops = {
2436 .start = load_self2_seq_start,
2437 .next = load_self2_seq_next,
2438 .show = load_self2_seq_show,
2439 .stop = smk_seq_stop,
2443 * smk_open_load_self2 - open() for /smack/load-self2
2444 * @inode: inode structure representing file
2445 * @file: "load" file pointer
2447 * For reading, use load_seq_* seq_file reading operations.
2449 static int smk_open_load_self2(struct inode *inode, struct file *file)
2451 return seq_open(file, &load_self2_seq_ops);
2455 * smk_write_load_self2 - write() for /smack/load-self2
2456 * @file: file pointer, not actually used
2457 * @buf: where to get the data from
2458 * @count: bytes sent
2459 * @ppos: where to start - must be 0
2462 static ssize_t smk_write_load_self2(struct file *file, const char __user *buf,
2463 size_t count, loff_t *ppos)
2465 struct task_smack *tsp = current_security();
2467 return smk_write_rules_list(file, buf, count, ppos, &tsp->smk_rules,
2468 &tsp->smk_rules_lock, SMK_LONG_FMT);
2471 static const struct file_operations smk_load_self2_ops = {
2472 .open = smk_open_load_self2,
2474 .llseek = seq_lseek,
2475 .write = smk_write_load_self2,
2476 .release = seq_release,
2480 * smk_write_access2 - handle access check transaction
2481 * @file: file pointer
2482 * @buf: data from user space
2483 * @count: bytes sent
2484 * @ppos: where to start - must be 0
2486 static ssize_t smk_write_access2(struct file *file, const char __user *buf,
2487 size_t count, loff_t *ppos)
2489 return smk_user_access(file, buf, count, ppos, SMK_LONG_FMT);
2492 static const struct file_operations smk_access2_ops = {
2493 .write = smk_write_access2,
2494 .read = simple_transaction_read,
2495 .release = simple_transaction_release,
2496 .llseek = generic_file_llseek,
2500 * smk_write_revoke_subj - write() for /smack/revoke-subject
2501 * @file: file pointer
2502 * @buf: data from user space
2503 * @count: bytes sent
2504 * @ppos: where to start - must be 0
2506 static ssize_t smk_write_revoke_subj(struct file *file, const char __user *buf,
2507 size_t count, loff_t *ppos)
2511 struct smack_known *skp;
2512 struct smack_rule *sp;
2513 struct list_head *rule_list;
2514 struct mutex *rule_lock;
2520 if (!smack_privileged(CAP_MAC_ADMIN))
2523 if (count == 0 || count > SMK_LONGLABEL)
2526 data = kzalloc(count, GFP_KERNEL);
2530 if (copy_from_user(data, buf, count) != 0) {
2535 cp = smk_parse_smack(data, count);
2541 skp = smk_find_entry(cp);
2545 rule_list = &skp->smk_rules;
2546 rule_lock = &skp->smk_rules_lock;
2548 mutex_lock(rule_lock);
2550 list_for_each_entry_rcu(sp, rule_list, list)
2553 mutex_unlock(rule_lock);
2563 static const struct file_operations smk_revoke_subj_ops = {
2564 .write = smk_write_revoke_subj,
2565 .read = simple_transaction_read,
2566 .release = simple_transaction_release,
2567 .llseek = generic_file_llseek,
2571 * smk_init_sysfs - initialize /sys/fs/smackfs
2574 static int smk_init_sysfs(void)
2576 return sysfs_create_mount_point(fs_kobj, "smackfs");
2580 * smk_write_change_rule - write() for /smack/change-rule
2581 * @file: file pointer
2582 * @buf: data from user space
2583 * @count: bytes sent
2584 * @ppos: where to start - must be 0
2586 static ssize_t smk_write_change_rule(struct file *file, const char __user *buf,
2587 size_t count, loff_t *ppos)
2590 * Must have privilege.
2592 if (!smack_privileged(CAP_MAC_ADMIN))
2595 return smk_write_rules_list(file, buf, count, ppos, NULL, NULL,
2599 static const struct file_operations smk_change_rule_ops = {
2600 .write = smk_write_change_rule,
2601 .read = simple_transaction_read,
2602 .release = simple_transaction_release,
2603 .llseek = generic_file_llseek,
2607 * smk_read_syslog - read() for smackfs/syslog
2608 * @filp: file pointer, not actually used
2609 * @buf: where to put the result
2610 * @cn: maximum to send along
2611 * @ppos: where to start
2613 * Returns number of bytes read or error code, as appropriate
2615 static ssize_t smk_read_syslog(struct file *filp, char __user *buf,
2616 size_t cn, loff_t *ppos)
2618 struct smack_known *skp;
2619 ssize_t rc = -EINVAL;
2625 if (smack_syslog_label == NULL)
2626 skp = &smack_known_star;
2628 skp = smack_syslog_label;
2630 asize = strlen(skp->smk_known) + 1;
2633 rc = simple_read_from_buffer(buf, cn, ppos, skp->smk_known,
2640 * smk_write_syslog - write() for smackfs/syslog
2641 * @file: file pointer, not actually used
2642 * @buf: where to get the data from
2643 * @count: bytes sent
2644 * @ppos: where to start
2646 * Returns number of bytes written or error code, as appropriate
2648 static ssize_t smk_write_syslog(struct file *file, const char __user *buf,
2649 size_t count, loff_t *ppos)
2652 struct smack_known *skp;
2655 if (!smack_privileged(CAP_MAC_ADMIN))
2658 data = memdup_user_nul(buf, count);
2660 return PTR_ERR(data);
2662 skp = smk_import_entry(data, count);
2666 smack_syslog_label = skp;
2672 static const struct file_operations smk_syslog_ops = {
2673 .read = smk_read_syslog,
2674 .write = smk_write_syslog,
2675 .llseek = default_llseek,
2679 * Seq_file read operations for /smack/relabel-self
2682 static void *relabel_self_seq_start(struct seq_file *s, loff_t *pos)
2684 struct task_smack *tsp = current_security();
2686 return smk_seq_start(s, pos, &tsp->smk_relabel);
2689 static void *relabel_self_seq_next(struct seq_file *s, void *v, loff_t *pos)
2691 struct task_smack *tsp = current_security();
2693 return smk_seq_next(s, v, pos, &tsp->smk_relabel);
2696 static int relabel_self_seq_show(struct seq_file *s, void *v)
2698 struct list_head *list = v;
2699 struct smack_known_list_elem *sklep =
2700 list_entry(list, struct smack_known_list_elem, list);
2702 seq_puts(s, sklep->smk_label->smk_known);
2708 static const struct seq_operations relabel_self_seq_ops = {
2709 .start = relabel_self_seq_start,
2710 .next = relabel_self_seq_next,
2711 .show = relabel_self_seq_show,
2712 .stop = smk_seq_stop,
2716 * smk_open_relabel_self - open() for /smack/relabel-self
2717 * @inode: inode structure representing file
2718 * @file: "relabel-self" file pointer
2720 * Connect our relabel_self_seq_* operations with /smack/relabel-self
2723 static int smk_open_relabel_self(struct inode *inode, struct file *file)
2725 return seq_open(file, &relabel_self_seq_ops);
2729 * smk_write_relabel_self - write() for /smack/relabel-self
2730 * @file: file pointer, not actually used
2731 * @buf: where to get the data from
2732 * @count: bytes sent
2733 * @ppos: where to start - must be 0
2736 static ssize_t smk_write_relabel_self(struct file *file, const char __user *buf,
2737 size_t count, loff_t *ppos)
2739 struct task_smack *tsp = current_security();
2742 LIST_HEAD(list_tmp);
2745 * Must have privilege.
2747 if (!smack_privileged(CAP_MAC_ADMIN))
2751 * Enough data must be present.
2756 data = memdup_user_nul(buf, count);
2758 return PTR_ERR(data);
2760 rc = smk_parse_label_list(data, &list_tmp);
2763 if (!rc || (rc == -EINVAL && list_empty(&list_tmp))) {
2764 smk_destroy_label_list(&tsp->smk_relabel);
2765 list_splice(&list_tmp, &tsp->smk_relabel);
2769 smk_destroy_label_list(&list_tmp);
2773 static const struct file_operations smk_relabel_self_ops = {
2774 .open = smk_open_relabel_self,
2776 .llseek = seq_lseek,
2777 .write = smk_write_relabel_self,
2778 .release = seq_release,
2782 * smk_read_ptrace - read() for /smack/ptrace
2783 * @filp: file pointer, not actually used
2784 * @buf: where to put the result
2785 * @count: maximum to send along
2786 * @ppos: where to start
2788 * Returns number of bytes read or error code, as appropriate
2790 static ssize_t smk_read_ptrace(struct file *filp, char __user *buf,
2791 size_t count, loff_t *ppos)
2799 sprintf(temp, "%d\n", smack_ptrace_rule);
2800 rc = simple_read_from_buffer(buf, count, ppos, temp, strlen(temp));
2805 * smk_write_ptrace - write() for /smack/ptrace
2806 * @file: file pointer
2807 * @buf: data from user space
2808 * @count: bytes sent
2809 * @ppos: where to start - must be 0
2811 static ssize_t smk_write_ptrace(struct file *file, const char __user *buf,
2812 size_t count, loff_t *ppos)
2817 if (!smack_privileged(CAP_MAC_ADMIN))
2820 if (*ppos != 0 || count >= sizeof(temp) || count == 0)
2823 if (copy_from_user(temp, buf, count) != 0)
2828 if (sscanf(temp, "%d", &i) != 1)
2830 if (i < SMACK_PTRACE_DEFAULT || i > SMACK_PTRACE_MAX)
2832 smack_ptrace_rule = i;
2837 static const struct file_operations smk_ptrace_ops = {
2838 .write = smk_write_ptrace,
2839 .read = smk_read_ptrace,
2840 .llseek = default_llseek,
2844 * smk_fill_super - fill the smackfs superblock
2845 * @sb: the empty superblock
2849 * Fill in the well known entries for the smack filesystem
2851 * Returns 0 on success, an error code on failure
2853 static int smk_fill_super(struct super_block *sb, void *data, int silent)
2856 struct inode *root_inode;
2858 static struct tree_descr smack_files[] = {
2860 "load", &smk_load_ops, S_IRUGO|S_IWUSR},
2862 "cipso", &smk_cipso_ops, S_IRUGO|S_IWUSR},
2864 "doi", &smk_doi_ops, S_IRUGO|S_IWUSR},
2866 "direct", &smk_direct_ops, S_IRUGO|S_IWUSR},
2868 "ambient", &smk_ambient_ops, S_IRUGO|S_IWUSR},
2870 "netlabel", &smk_net4addr_ops, S_IRUGO|S_IWUSR},
2872 "onlycap", &smk_onlycap_ops, S_IRUGO|S_IWUSR},
2874 "logging", &smk_logging_ops, S_IRUGO|S_IWUSR},
2876 "load-self", &smk_load_self_ops, S_IRUGO|S_IWUGO},
2878 "access", &smk_access_ops, S_IRUGO|S_IWUGO},
2880 "mapped", &smk_mapped_ops, S_IRUGO|S_IWUSR},
2882 "load2", &smk_load2_ops, S_IRUGO|S_IWUSR},
2883 [SMK_LOAD_SELF2] = {
2884 "load-self2", &smk_load_self2_ops, S_IRUGO|S_IWUGO},
2886 "access2", &smk_access2_ops, S_IRUGO|S_IWUGO},
2888 "cipso2", &smk_cipso2_ops, S_IRUGO|S_IWUSR},
2889 [SMK_REVOKE_SUBJ] = {
2890 "revoke-subject", &smk_revoke_subj_ops,
2892 [SMK_CHANGE_RULE] = {
2893 "change-rule", &smk_change_rule_ops, S_IRUGO|S_IWUSR},
2895 "syslog", &smk_syslog_ops, S_IRUGO|S_IWUSR},
2897 "ptrace", &smk_ptrace_ops, S_IRUGO|S_IWUSR},
2898 #ifdef CONFIG_SECURITY_SMACK_BRINGUP
2899 [SMK_UNCONFINED] = {
2900 "unconfined", &smk_unconfined_ops, S_IRUGO|S_IWUSR},
2902 #if IS_ENABLED(CONFIG_IPV6)
2904 "ipv6host", &smk_net6addr_ops, S_IRUGO|S_IWUSR},
2905 #endif /* CONFIG_IPV6 */
2906 [SMK_RELABEL_SELF] = {
2907 "relabel-self", &smk_relabel_self_ops,
2913 rc = simple_fill_super(sb, SMACK_MAGIC, smack_files);
2915 printk(KERN_ERR "%s failed %d while creating inodes\n",
2920 root_inode = d_inode(sb->s_root);
2926 * smk_mount - get the smackfs superblock
2927 * @fs_type: passed along without comment
2928 * @flags: passed along without comment
2929 * @dev_name: passed along without comment
2930 * @data: passed along without comment
2932 * Just passes everything along.
2934 * Returns what the lower level code does.
2936 static struct dentry *smk_mount(struct file_system_type *fs_type,
2937 int flags, const char *dev_name, void *data)
2939 return mount_single(fs_type, flags, data, smk_fill_super);
2942 static struct file_system_type smk_fs_type = {
2945 .kill_sb = kill_litter_super,
2948 static struct vfsmount *smackfs_mount;
2950 static int __init smk_preset_netlabel(struct smack_known *skp)
2952 skp->smk_netlabel.domain = skp->smk_known;
2953 skp->smk_netlabel.flags =
2954 NETLBL_SECATTR_DOMAIN | NETLBL_SECATTR_MLS_LVL;
2955 return smk_netlbl_mls(smack_cipso_direct, skp->smk_known,
2956 &skp->smk_netlabel, strlen(skp->smk_known));
2960 * init_smk_fs - get the smackfs superblock
2962 * register the smackfs
2964 * Do not register smackfs if Smack wasn't enabled
2965 * on boot. We can not put this method normally under the
2966 * smack_init() code path since the security subsystem get
2967 * initialized before the vfs caches.
2969 * Returns true if we were not chosen on boot or if
2970 * we were chosen and filesystem registration succeeded.
2972 static int __init init_smk_fs(void)
2977 if (smack_enabled == 0)
2980 err = smk_init_sysfs();
2982 printk(KERN_ERR "smackfs: sysfs mountpoint problem.\n");
2984 err = register_filesystem(&smk_fs_type);
2986 smackfs_mount = kern_mount(&smk_fs_type);
2987 if (IS_ERR(smackfs_mount)) {
2988 printk(KERN_ERR "smackfs: could not mount!\n");
2989 err = PTR_ERR(smackfs_mount);
2990 smackfs_mount = NULL;
2995 smk_unlbl_ambient(NULL);
2997 rc = smk_preset_netlabel(&smack_known_floor);
2998 if (err == 0 && rc < 0)
3000 rc = smk_preset_netlabel(&smack_known_hat);
3001 if (err == 0 && rc < 0)
3003 rc = smk_preset_netlabel(&smack_known_huh);
3004 if (err == 0 && rc < 0)
3006 rc = smk_preset_netlabel(&smack_known_invalid);
3007 if (err == 0 && rc < 0)
3009 rc = smk_preset_netlabel(&smack_known_star);
3010 if (err == 0 && rc < 0)
3012 rc = smk_preset_netlabel(&smack_known_web);
3013 if (err == 0 && rc < 0)
3019 __initcall(init_smk_fs);