Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2007 Casey Schaufler <casey@schaufler-ca.com> |
| 3 | * |
| 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. |
| 7 | * |
| 8 | * Author: |
| 9 | * Casey Schaufler <casey@schaufler-ca.com> |
| 10 | * |
| 11 | */ |
| 12 | |
| 13 | #ifndef _SECURITY_SMACK_H |
| 14 | #define _SECURITY_SMACK_H |
| 15 | |
| 16 | #include <linux/capability.h> |
| 17 | #include <linux/spinlock.h> |
Ahmed S. Darwish | 076c54c | 2008-03-06 18:09:10 +0200 | [diff] [blame] | 18 | #include <linux/security.h> |
Casey Schaufler | 6d3dc07 | 2008-12-31 12:54:12 -0500 | [diff] [blame] | 19 | #include <linux/in.h> |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 20 | #include <net/netlabel.h> |
Etienne Basset | 7198e2e | 2009-03-24 20:53:24 +0100 | [diff] [blame] | 21 | #include <linux/list.h> |
| 22 | #include <linux/rculist.h> |
Etienne Basset | ecfcc53 | 2009-04-08 20:40:06 +0200 | [diff] [blame] | 23 | #include <linux/lsm_audit.h> |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 24 | |
| 25 | /* |
Casey Schaufler | f7112e6 | 2012-05-06 15:22:02 -0700 | [diff] [blame] | 26 | * Smack labels were limited to 23 characters for a long time. |
| 27 | */ |
| 28 | #define SMK_LABELLEN 24 |
| 29 | #define SMK_LONGLABEL 256 |
| 30 | |
| 31 | /* |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 32 | * This is the repository for labels seen so that it is |
| 33 | * not necessary to keep allocating tiny chuncks of memory |
| 34 | * and so that they can be shared. |
| 35 | * |
| 36 | * Labels are never modified in place. Anytime a label |
| 37 | * is imported (e.g. xattrset on a file) the list is checked |
| 38 | * for it and it is added if it doesn't exist. The address |
| 39 | * is passed out in either case. Entries are added, but |
| 40 | * never deleted. |
| 41 | * |
| 42 | * Since labels are hanging around anyway it doesn't |
| 43 | * hurt to maintain a secid for those awkward situations |
| 44 | * where kernel components that ought to use LSM independent |
| 45 | * interfaces don't. The secid should go away when all of |
| 46 | * these components have been repaired. |
| 47 | * |
Casey Schaufler | f7112e6 | 2012-05-06 15:22:02 -0700 | [diff] [blame] | 48 | * The cipso value associated with the label gets stored here, too. |
Casey Schaufler | 272cd7a | 2011-09-20 12:24:36 -0700 | [diff] [blame] | 49 | * |
| 50 | * Keep the access rules for this subject label here so that |
| 51 | * the entire set of rules does not need to be examined every |
| 52 | * time. |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 53 | */ |
| 54 | struct smack_known { |
Casey Schaufler | f7112e6 | 2012-05-06 15:22:02 -0700 | [diff] [blame] | 55 | struct list_head list; |
Tomasz Stanislawski | 4d7cf4a | 2013-06-11 14:55:13 +0200 | [diff] [blame] | 56 | struct hlist_node smk_hashed; |
Casey Schaufler | f7112e6 | 2012-05-06 15:22:02 -0700 | [diff] [blame] | 57 | char *smk_known; |
| 58 | u32 smk_secid; |
| 59 | struct netlbl_lsm_secattr smk_netlabel; /* on wire labels */ |
| 60 | struct list_head smk_rules; /* access rules */ |
| 61 | struct mutex smk_rules_lock; /* lock for rules */ |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 62 | }; |
| 63 | |
| 64 | /* |
Casey Schaufler | 2f823ff | 2013-05-22 18:43:03 -0700 | [diff] [blame] | 65 | * Maximum number of bytes for the levels in a CIPSO IP option. |
| 66 | * Why 23? CIPSO is constrained to 30, so a 32 byte buffer is |
| 67 | * bigger than can be used, and 24 is the next lower multiple |
| 68 | * of 8, and there are too many issues if there isn't space set |
| 69 | * aside for the terminating null byte. |
| 70 | */ |
| 71 | #define SMK_CIPSOLEN 24 |
| 72 | |
| 73 | struct superblock_smack { |
Lukasz Pawelczyk | 21c7eae | 2014-08-29 17:02:55 +0200 | [diff] [blame] | 74 | struct smack_known *smk_root; |
| 75 | struct smack_known *smk_floor; |
| 76 | struct smack_known *smk_hat; |
| 77 | struct smack_known *smk_default; |
| 78 | int smk_initialized; |
Casey Schaufler | 2f823ff | 2013-05-22 18:43:03 -0700 | [diff] [blame] | 79 | }; |
| 80 | |
| 81 | struct socket_smack { |
| 82 | struct smack_known *smk_out; /* outbound label */ |
Casey Schaufler | 54e70ec | 2014-04-10 16:37:08 -0700 | [diff] [blame] | 83 | struct smack_known *smk_in; /* inbound label */ |
| 84 | struct smack_known *smk_packet; /* TCP peer label */ |
Casey Schaufler | 2f823ff | 2013-05-22 18:43:03 -0700 | [diff] [blame] | 85 | }; |
| 86 | |
| 87 | /* |
| 88 | * Inode smack data |
| 89 | */ |
| 90 | struct inode_smack { |
Lukasz Pawelczyk | 21c7eae | 2014-08-29 17:02:55 +0200 | [diff] [blame] | 91 | struct smack_known *smk_inode; /* label of the fso */ |
Casey Schaufler | 2f823ff | 2013-05-22 18:43:03 -0700 | [diff] [blame] | 92 | struct smack_known *smk_task; /* label of the task */ |
| 93 | struct smack_known *smk_mmap; /* label of the mmap domain */ |
| 94 | struct mutex smk_lock; /* initialization lock */ |
| 95 | int smk_flags; /* smack inode flags */ |
| 96 | }; |
| 97 | |
| 98 | struct task_smack { |
| 99 | struct smack_known *smk_task; /* label for access control */ |
| 100 | struct smack_known *smk_forked; /* label when forked */ |
| 101 | struct list_head smk_rules; /* per task access rules */ |
| 102 | struct mutex smk_rules_lock; /* lock for the rules */ |
| 103 | }; |
| 104 | |
| 105 | #define SMK_INODE_INSTANT 0x01 /* inode is instantiated */ |
| 106 | #define SMK_INODE_TRANSMUTE 0x02 /* directory is transmuting */ |
| 107 | #define SMK_INODE_CHANGED 0x04 /* smack was transmuted */ |
Casey Schaufler | bf4b2fe | 2015-03-21 18:26:40 -0700 | [diff] [blame^] | 108 | #define SMK_INODE_IMPURE 0x08 /* involved in an impure transaction */ |
Casey Schaufler | 2f823ff | 2013-05-22 18:43:03 -0700 | [diff] [blame] | 109 | |
| 110 | /* |
| 111 | * A label access rule. |
| 112 | */ |
| 113 | struct smack_rule { |
| 114 | struct list_head list; |
| 115 | struct smack_known *smk_subject; |
Lukasz Pawelczyk | 21c7eae | 2014-08-29 17:02:55 +0200 | [diff] [blame] | 116 | struct smack_known *smk_object; |
Casey Schaufler | 2f823ff | 2013-05-22 18:43:03 -0700 | [diff] [blame] | 117 | int smk_access; |
| 118 | }; |
| 119 | |
| 120 | /* |
| 121 | * An entry in the table identifying hosts. |
| 122 | */ |
| 123 | struct smk_netlbladdr { |
| 124 | struct list_head list; |
| 125 | struct sockaddr_in smk_host; /* network address */ |
| 126 | struct in_addr smk_mask; /* network mask */ |
Lukasz Pawelczyk | 21c7eae | 2014-08-29 17:02:55 +0200 | [diff] [blame] | 127 | struct smack_known *smk_label; /* label */ |
Casey Schaufler | 2f823ff | 2013-05-22 18:43:03 -0700 | [diff] [blame] | 128 | }; |
| 129 | |
| 130 | /* |
| 131 | * An entry in the table identifying ports. |
| 132 | */ |
| 133 | struct smk_port_label { |
| 134 | struct list_head list; |
| 135 | struct sock *smk_sock; /* socket initialized on */ |
| 136 | unsigned short smk_port; /* the port number */ |
Casey Schaufler | 54e70ec | 2014-04-10 16:37:08 -0700 | [diff] [blame] | 137 | struct smack_known *smk_in; /* inbound label */ |
Casey Schaufler | 2f823ff | 2013-05-22 18:43:03 -0700 | [diff] [blame] | 138 | struct smack_known *smk_out; /* outgoing label */ |
| 139 | }; |
| 140 | |
| 141 | /* |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 142 | * Mount options |
| 143 | */ |
| 144 | #define SMK_FSDEFAULT "smackfsdef=" |
| 145 | #define SMK_FSFLOOR "smackfsfloor=" |
| 146 | #define SMK_FSHAT "smackfshat=" |
| 147 | #define SMK_FSROOT "smackfsroot=" |
Casey Schaufler | e830b39 | 2013-05-22 18:43:07 -0700 | [diff] [blame] | 148 | #define SMK_FSTRANS "smackfstransmute=" |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 149 | |
Etienne Basset | 4303154 | 2009-03-27 17:11:01 -0400 | [diff] [blame] | 150 | #define SMACK_CIPSO_OPTION "-CIPSO" |
| 151 | |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 152 | /* |
Casey Schaufler | 6d3dc07 | 2008-12-31 12:54:12 -0500 | [diff] [blame] | 153 | * How communications on this socket are treated. |
| 154 | * Usually it's determined by the underlying netlabel code |
| 155 | * but there are certain cases, including single label hosts |
| 156 | * and potentially single label interfaces for which the |
| 157 | * treatment can not be known in advance. |
| 158 | * |
| 159 | * The possibility of additional labeling schemes being |
| 160 | * introduced in the future exists as well. |
| 161 | */ |
| 162 | #define SMACK_UNLABELED_SOCKET 0 |
| 163 | #define SMACK_CIPSO_SOCKET 1 |
| 164 | |
| 165 | /* |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 166 | * CIPSO defaults. |
| 167 | */ |
| 168 | #define SMACK_CIPSO_DOI_DEFAULT 3 /* Historical */ |
Casey Schaufler | 6d3dc07 | 2008-12-31 12:54:12 -0500 | [diff] [blame] | 169 | #define SMACK_CIPSO_DOI_INVALID -1 /* Not a DOI */ |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 170 | #define SMACK_CIPSO_DIRECT_DEFAULT 250 /* Arbitrary */ |
Casey Schaufler | f7112e6 | 2012-05-06 15:22:02 -0700 | [diff] [blame] | 171 | #define SMACK_CIPSO_MAPPED_DEFAULT 251 /* Also arbitrary */ |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 172 | #define SMACK_CIPSO_MAXLEVEL 255 /* CIPSO 2.2 standard */ |
Casey Schaufler | 677264e | 2013-06-28 13:47:07 -0700 | [diff] [blame] | 173 | /* |
| 174 | * CIPSO 2.2 standard is 239, but Smack wants to use the |
| 175 | * categories in a structured way that limits the value to |
| 176 | * the bits in 23 bytes, hence the unusual number. |
| 177 | */ |
| 178 | #define SMACK_CIPSO_MAXCATNUM 184 /* 23 * 8 */ |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 179 | |
| 180 | /* |
Lukasz Pawelczyk | 6686781 | 2014-03-11 17:07:06 +0100 | [diff] [blame] | 181 | * Ptrace rules |
| 182 | */ |
| 183 | #define SMACK_PTRACE_DEFAULT 0 |
| 184 | #define SMACK_PTRACE_EXACT 1 |
| 185 | #define SMACK_PTRACE_DRACONIAN 2 |
| 186 | #define SMACK_PTRACE_MAX SMACK_PTRACE_DRACONIAN |
| 187 | |
| 188 | /* |
Casey Schaufler | c0ab6e5 | 2013-10-11 18:06:39 -0700 | [diff] [blame] | 189 | * Flags for untraditional access modes. |
| 190 | * It shouldn't be necessary to avoid conflicts with definitions |
| 191 | * in fs.h, but do so anyway. |
Jarkko Sakkinen | 5c6d112 | 2010-12-07 13:34:01 +0200 | [diff] [blame] | 192 | */ |
Casey Schaufler | c0ab6e5 | 2013-10-11 18:06:39 -0700 | [diff] [blame] | 193 | #define MAY_TRANSMUTE 0x00001000 /* Controls directory labeling */ |
| 194 | #define MAY_LOCK 0x00002000 /* Locks should be writes, but ... */ |
Casey Schaufler | d166c80 | 2014-08-27 14:51:27 -0700 | [diff] [blame] | 195 | #define MAY_BRINGUP 0x00004000 /* Report use of this rule */ |
Casey Schaufler | c0ab6e5 | 2013-10-11 18:06:39 -0700 | [diff] [blame] | 196 | |
Casey Schaufler | bf4b2fe | 2015-03-21 18:26:40 -0700 | [diff] [blame^] | 197 | #define SMACK_BRINGUP_ALLOW 1 /* Allow bringup mode */ |
| 198 | #define SMACK_UNCONFINED_SUBJECT 2 /* Allow unconfined label */ |
| 199 | #define SMACK_UNCONFINED_OBJECT 3 /* Allow unconfined label */ |
| 200 | |
Jarkko Sakkinen | 5c6d112 | 2010-12-07 13:34:01 +0200 | [diff] [blame] | 201 | /* |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 202 | * Just to make the common cases easier to deal with |
| 203 | */ |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 204 | #define MAY_ANYREAD (MAY_READ | MAY_EXEC) |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 205 | #define MAY_READWRITE (MAY_READ | MAY_WRITE) |
| 206 | #define MAY_NOT 0 |
| 207 | |
| 208 | /* |
Casey Schaufler | d166c80 | 2014-08-27 14:51:27 -0700 | [diff] [blame] | 209 | * Number of access types used by Smack (rwxatlb) |
Etienne Basset | ecfcc53 | 2009-04-08 20:40:06 +0200 | [diff] [blame] | 210 | */ |
Casey Schaufler | d166c80 | 2014-08-27 14:51:27 -0700 | [diff] [blame] | 211 | #define SMK_NUM_ACCESS_TYPE 7 |
Etienne Basset | ecfcc53 | 2009-04-08 20:40:06 +0200 | [diff] [blame] | 212 | |
Eric Paris | 3b3b0e4 | 2012-04-03 09:37:02 -0700 | [diff] [blame] | 213 | /* SMACK data */ |
| 214 | struct smack_audit_data { |
| 215 | const char *function; |
| 216 | char *subject; |
| 217 | char *object; |
| 218 | char *request; |
| 219 | int result; |
| 220 | }; |
| 221 | |
Etienne Basset | ecfcc53 | 2009-04-08 20:40:06 +0200 | [diff] [blame] | 222 | /* |
| 223 | * Smack audit data; is empty if CONFIG_AUDIT not set |
| 224 | * to save some stack |
| 225 | */ |
| 226 | struct smk_audit_info { |
| 227 | #ifdef CONFIG_AUDIT |
| 228 | struct common_audit_data a; |
Eric Paris | 3b3b0e4 | 2012-04-03 09:37:02 -0700 | [diff] [blame] | 229 | struct smack_audit_data sad; |
Etienne Basset | ecfcc53 | 2009-04-08 20:40:06 +0200 | [diff] [blame] | 230 | #endif |
| 231 | }; |
| 232 | /* |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 233 | * These functions are in smack_lsm.c |
| 234 | */ |
Lukasz Pawelczyk | 21c7eae | 2014-08-29 17:02:55 +0200 | [diff] [blame] | 235 | struct inode_smack *new_inode_smack(struct smack_known *); |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 236 | |
| 237 | /* |
| 238 | * These functions are in smack_access.c |
| 239 | */ |
Casey Schaufler | 7898e1f | 2011-01-17 08:05:27 -0800 | [diff] [blame] | 240 | int smk_access_entry(char *, char *, struct list_head *); |
Lukasz Pawelczyk | 21c7eae | 2014-08-29 17:02:55 +0200 | [diff] [blame] | 241 | int smk_access(struct smack_known *, struct smack_known *, |
| 242 | int, struct smk_audit_info *); |
| 243 | int smk_tskacc(struct task_smack *, struct smack_known *, |
| 244 | u32, struct smk_audit_info *); |
| 245 | int smk_curacc(struct smack_known *, u32, struct smk_audit_info *); |
Casey Schaufler | 2f823ff | 2013-05-22 18:43:03 -0700 | [diff] [blame] | 246 | struct smack_known *smack_from_secid(const u32); |
Casey Schaufler | f7112e6 | 2012-05-06 15:22:02 -0700 | [diff] [blame] | 247 | char *smk_parse_smack(const char *string, int len); |
| 248 | int smk_netlbl_mls(int, char *, struct netlbl_lsm_secattr *, int); |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 249 | struct smack_known *smk_import_entry(const char *, int); |
Tomasz Stanislawski | 4d7cf4a | 2013-06-11 14:55:13 +0200 | [diff] [blame] | 250 | void smk_insert_entry(struct smack_known *skp); |
Casey Schaufler | 272cd7a | 2011-09-20 12:24:36 -0700 | [diff] [blame] | 251 | struct smack_known *smk_find_entry(const char *); |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 252 | |
| 253 | /* |
| 254 | * Shared data. |
| 255 | */ |
Casey Schaufler | 69f287a | 2014-12-12 17:08:40 -0800 | [diff] [blame] | 256 | extern int smack_enabled; |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 257 | extern int smack_cipso_direct; |
Casey Schaufler | f7112e6 | 2012-05-06 15:22:02 -0700 | [diff] [blame] | 258 | extern int smack_cipso_mapped; |
Casey Schaufler | 2f823ff | 2013-05-22 18:43:03 -0700 | [diff] [blame] | 259 | extern struct smack_known *smack_net_ambient; |
Casey Schaufler | 00f84f3 | 2013-12-23 11:07:10 -0800 | [diff] [blame] | 260 | extern struct smack_known *smack_onlycap; |
| 261 | extern struct smack_known *smack_syslog_label; |
Casey Schaufler | bf4b2fe | 2015-03-21 18:26:40 -0700 | [diff] [blame^] | 262 | #ifdef CONFIG_SECURITY_SMACK_BRINGUP |
| 263 | extern struct smack_known *smack_unconfined; |
| 264 | #endif |
Lukasz Pawelczyk | 21c7eae | 2014-08-29 17:02:55 +0200 | [diff] [blame] | 265 | extern struct smack_known smack_cipso_option; |
Lukasz Pawelczyk | 6686781 | 2014-03-11 17:07:06 +0100 | [diff] [blame] | 266 | extern int smack_ptrace_rule; |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 267 | |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 268 | extern struct smack_known smack_known_floor; |
| 269 | extern struct smack_known smack_known_hat; |
| 270 | extern struct smack_known smack_known_huh; |
| 271 | extern struct smack_known smack_known_invalid; |
| 272 | extern struct smack_known smack_known_star; |
Casey Schaufler | 6d3dc07 | 2008-12-31 12:54:12 -0500 | [diff] [blame] | 273 | extern struct smack_known smack_known_web; |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 274 | |
Casey Schaufler | f7112e6 | 2012-05-06 15:22:02 -0700 | [diff] [blame] | 275 | extern struct mutex smack_known_lock; |
Etienne Basset | 7198e2e | 2009-03-24 20:53:24 +0100 | [diff] [blame] | 276 | extern struct list_head smack_known_list; |
Etienne Basset | 7198e2e | 2009-03-24 20:53:24 +0100 | [diff] [blame] | 277 | extern struct list_head smk_netlbladdr_list; |
| 278 | |
Ahmed S. Darwish | 076c54c | 2008-03-06 18:09:10 +0200 | [diff] [blame] | 279 | extern struct security_operations smack_ops; |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 280 | |
Tomasz Stanislawski | 4d7cf4a | 2013-06-11 14:55:13 +0200 | [diff] [blame] | 281 | #define SMACK_HASH_SLOTS 16 |
| 282 | extern struct hlist_head smack_known_hash[SMACK_HASH_SLOTS]; |
| 283 | |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 284 | /* |
Jarkko Sakkinen | 5c6d112 | 2010-12-07 13:34:01 +0200 | [diff] [blame] | 285 | * Is the directory transmuting? |
| 286 | */ |
| 287 | static inline int smk_inode_transmutable(const struct inode *isp) |
| 288 | { |
| 289 | struct inode_smack *sip = isp->i_security; |
| 290 | return (sip->smk_flags & SMK_INODE_TRANSMUTE) != 0; |
| 291 | } |
| 292 | |
| 293 | /* |
Lukasz Pawelczyk | 21c7eae | 2014-08-29 17:02:55 +0200 | [diff] [blame] | 294 | * Present a pointer to the smack label entry in an inode blob. |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 295 | */ |
Lukasz Pawelczyk | 21c7eae | 2014-08-29 17:02:55 +0200 | [diff] [blame] | 296 | static inline struct smack_known *smk_of_inode(const struct inode *isp) |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 297 | { |
| 298 | struct inode_smack *sip = isp->i_security; |
| 299 | return sip->smk_inode; |
| 300 | } |
| 301 | |
Etienne Basset | ecfcc53 | 2009-04-08 20:40:06 +0200 | [diff] [blame] | 302 | /* |
Casey Schaufler | 2f823ff | 2013-05-22 18:43:03 -0700 | [diff] [blame] | 303 | * Present a pointer to the smack label entry in an task blob. |
Casey Schaufler | 676dac4 | 2010-12-02 06:43:39 -0800 | [diff] [blame] | 304 | */ |
Casey Schaufler | 2f823ff | 2013-05-22 18:43:03 -0700 | [diff] [blame] | 305 | static inline struct smack_known *smk_of_task(const struct task_smack *tsp) |
Casey Schaufler | 676dac4 | 2010-12-02 06:43:39 -0800 | [diff] [blame] | 306 | { |
| 307 | return tsp->smk_task; |
| 308 | } |
| 309 | |
Andrey Ryabinin | 6d1cff2 | 2015-01-13 18:52:40 +0300 | [diff] [blame] | 310 | static inline struct smack_known *smk_of_task_struct(const struct task_struct *t) |
| 311 | { |
| 312 | struct smack_known *skp; |
| 313 | |
| 314 | rcu_read_lock(); |
| 315 | skp = smk_of_task(__task_cred(t)->security); |
| 316 | rcu_read_unlock(); |
| 317 | return skp; |
| 318 | } |
| 319 | |
Casey Schaufler | 676dac4 | 2010-12-02 06:43:39 -0800 | [diff] [blame] | 320 | /* |
Casey Schaufler | 2f823ff | 2013-05-22 18:43:03 -0700 | [diff] [blame] | 321 | * Present a pointer to the forked smack label entry in an task blob. |
Casey Schaufler | 676dac4 | 2010-12-02 06:43:39 -0800 | [diff] [blame] | 322 | */ |
Casey Schaufler | 2f823ff | 2013-05-22 18:43:03 -0700 | [diff] [blame] | 323 | static inline struct smack_known *smk_of_forked(const struct task_smack *tsp) |
Casey Schaufler | 676dac4 | 2010-12-02 06:43:39 -0800 | [diff] [blame] | 324 | { |
| 325 | return tsp->smk_forked; |
| 326 | } |
| 327 | |
| 328 | /* |
Jarkko Sakkinen | 5c6d112 | 2010-12-07 13:34:01 +0200 | [diff] [blame] | 329 | * Present a pointer to the smack label in the current task blob. |
Casey Schaufler | 676dac4 | 2010-12-02 06:43:39 -0800 | [diff] [blame] | 330 | */ |
Casey Schaufler | 2f823ff | 2013-05-22 18:43:03 -0700 | [diff] [blame] | 331 | static inline struct smack_known *smk_of_current(void) |
Casey Schaufler | 676dac4 | 2010-12-02 06:43:39 -0800 | [diff] [blame] | 332 | { |
| 333 | return smk_of_task(current_security()); |
| 334 | } |
| 335 | |
| 336 | /* |
Casey Schaufler | 1880eff | 2012-06-05 15:28:30 -0700 | [diff] [blame] | 337 | * Is the task privileged and allowed to be privileged |
| 338 | * by the onlycap rule. |
| 339 | */ |
| 340 | static inline int smack_privileged(int cap) |
| 341 | { |
Casey Schaufler | 2f823ff | 2013-05-22 18:43:03 -0700 | [diff] [blame] | 342 | struct smack_known *skp = smk_of_current(); |
| 343 | |
Casey Schaufler | 1880eff | 2012-06-05 15:28:30 -0700 | [diff] [blame] | 344 | if (!capable(cap)) |
| 345 | return 0; |
Casey Schaufler | 00f84f3 | 2013-12-23 11:07:10 -0800 | [diff] [blame] | 346 | if (smack_onlycap == NULL || smack_onlycap == skp) |
Casey Schaufler | 1880eff | 2012-06-05 15:28:30 -0700 | [diff] [blame] | 347 | return 1; |
| 348 | return 0; |
| 349 | } |
| 350 | |
| 351 | /* |
Etienne Basset | ecfcc53 | 2009-04-08 20:40:06 +0200 | [diff] [blame] | 352 | * logging functions |
| 353 | */ |
| 354 | #define SMACK_AUDIT_DENIED 0x1 |
| 355 | #define SMACK_AUDIT_ACCEPT 0x2 |
| 356 | extern int log_policy; |
| 357 | |
| 358 | void smack_log(char *subject_label, char *object_label, |
| 359 | int request, |
| 360 | int result, struct smk_audit_info *auditdata); |
| 361 | |
| 362 | #ifdef CONFIG_AUDIT |
| 363 | |
| 364 | /* |
| 365 | * some inline functions to set up audit data |
| 366 | * they do nothing if CONFIG_AUDIT is not set |
| 367 | * |
| 368 | */ |
| 369 | static inline void smk_ad_init(struct smk_audit_info *a, const char *func, |
| 370 | char type) |
| 371 | { |
Eric Paris | 50c205f | 2012-04-04 15:01:43 -0400 | [diff] [blame] | 372 | memset(&a->sad, 0, sizeof(a->sad)); |
Etienne Basset | ecfcc53 | 2009-04-08 20:40:06 +0200 | [diff] [blame] | 373 | a->a.type = type; |
Eric Paris | 3b3b0e4 | 2012-04-03 09:37:02 -0700 | [diff] [blame] | 374 | a->a.smack_audit_data = &a->sad; |
| 375 | a->a.smack_audit_data->function = func; |
Etienne Basset | ecfcc53 | 2009-04-08 20:40:06 +0200 | [diff] [blame] | 376 | } |
| 377 | |
Eric Paris | 48c62af | 2012-04-02 13:15:44 -0400 | [diff] [blame] | 378 | static inline void smk_ad_init_net(struct smk_audit_info *a, const char *func, |
| 379 | char type, struct lsm_network_audit *net) |
| 380 | { |
| 381 | smk_ad_init(a, func, type); |
| 382 | memset(net, 0, sizeof(*net)); |
| 383 | a->a.u.net = net; |
| 384 | } |
| 385 | |
Etienne Basset | ecfcc53 | 2009-04-08 20:40:06 +0200 | [diff] [blame] | 386 | static inline void smk_ad_setfield_u_tsk(struct smk_audit_info *a, |
| 387 | struct task_struct *t) |
| 388 | { |
| 389 | a->a.u.tsk = t; |
| 390 | } |
| 391 | static inline void smk_ad_setfield_u_fs_path_dentry(struct smk_audit_info *a, |
| 392 | struct dentry *d) |
| 393 | { |
Eric Paris | a269434 | 2011-04-25 13:10:27 -0400 | [diff] [blame] | 394 | a->a.u.dentry = d; |
Etienne Basset | ecfcc53 | 2009-04-08 20:40:06 +0200 | [diff] [blame] | 395 | } |
| 396 | static inline void smk_ad_setfield_u_fs_inode(struct smk_audit_info *a, |
| 397 | struct inode *i) |
| 398 | { |
Eric Paris | f48b739 | 2011-04-25 12:54:27 -0400 | [diff] [blame] | 399 | a->a.u.inode = i; |
Etienne Basset | ecfcc53 | 2009-04-08 20:40:06 +0200 | [diff] [blame] | 400 | } |
| 401 | static inline void smk_ad_setfield_u_fs_path(struct smk_audit_info *a, |
| 402 | struct path p) |
| 403 | { |
Eric Paris | f48b739 | 2011-04-25 12:54:27 -0400 | [diff] [blame] | 404 | a->a.u.path = p; |
Etienne Basset | ecfcc53 | 2009-04-08 20:40:06 +0200 | [diff] [blame] | 405 | } |
| 406 | static inline void smk_ad_setfield_u_net_sk(struct smk_audit_info *a, |
| 407 | struct sock *sk) |
| 408 | { |
Eric Paris | 48c62af | 2012-04-02 13:15:44 -0400 | [diff] [blame] | 409 | a->a.u.net->sk = sk; |
Etienne Basset | ecfcc53 | 2009-04-08 20:40:06 +0200 | [diff] [blame] | 410 | } |
| 411 | |
| 412 | #else /* no AUDIT */ |
| 413 | |
| 414 | static inline void smk_ad_init(struct smk_audit_info *a, const char *func, |
| 415 | char type) |
| 416 | { |
| 417 | } |
| 418 | static inline void smk_ad_setfield_u_tsk(struct smk_audit_info *a, |
| 419 | struct task_struct *t) |
| 420 | { |
| 421 | } |
| 422 | static inline void smk_ad_setfield_u_fs_path_dentry(struct smk_audit_info *a, |
| 423 | struct dentry *d) |
| 424 | { |
| 425 | } |
| 426 | static inline void smk_ad_setfield_u_fs_path_mnt(struct smk_audit_info *a, |
| 427 | struct vfsmount *m) |
| 428 | { |
| 429 | } |
| 430 | static inline void smk_ad_setfield_u_fs_inode(struct smk_audit_info *a, |
| 431 | struct inode *i) |
| 432 | { |
| 433 | } |
| 434 | static inline void smk_ad_setfield_u_fs_path(struct smk_audit_info *a, |
| 435 | struct path p) |
| 436 | { |
| 437 | } |
| 438 | static inline void smk_ad_setfield_u_net_sk(struct smk_audit_info *a, |
| 439 | struct sock *sk) |
| 440 | { |
| 441 | } |
| 442 | #endif |
| 443 | |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 444 | #endif /* _SECURITY_SMACK_H */ |