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 | * Authors: |
| 9 | * Casey Schaufler <casey@schaufler-ca.com> |
| 10 | * Ahmed S. Darwish <darwish.07@gmail.com> |
| 11 | * |
| 12 | * Special thanks to the authors of selinuxfs. |
| 13 | * |
| 14 | * Karl MacMillan <kmacmillan@tresys.com> |
| 15 | * James Morris <jmorris@redhat.com> |
| 16 | * |
| 17 | */ |
| 18 | |
| 19 | #include <linux/kernel.h> |
| 20 | #include <linux/vmalloc.h> |
| 21 | #include <linux/security.h> |
| 22 | #include <linux/mutex.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 23 | #include <linux/slab.h> |
Casey Schaufler | 6d3dc07 | 2008-12-31 12:54:12 -0500 | [diff] [blame] | 24 | #include <net/net_namespace.h> |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 25 | #include <net/netlabel.h> |
| 26 | #include <net/cipso_ipv4.h> |
| 27 | #include <linux/seq_file.h> |
| 28 | #include <linux/ctype.h> |
Casey Schaufler | 4bc87e6 | 2008-02-15 15:24:25 -0800 | [diff] [blame] | 29 | #include <linux/audit.h> |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 30 | #include "smack.h" |
| 31 | |
| 32 | /* |
| 33 | * smackfs pseudo filesystem. |
| 34 | */ |
| 35 | |
| 36 | enum smk_inos { |
| 37 | SMK_ROOT_INO = 2, |
| 38 | SMK_LOAD = 3, /* load policy */ |
| 39 | SMK_CIPSO = 4, /* load label -> CIPSO mapping */ |
| 40 | SMK_DOI = 5, /* CIPSO DOI */ |
| 41 | SMK_DIRECT = 6, /* CIPSO level indicating direct label */ |
| 42 | SMK_AMBIENT = 7, /* internet ambient label */ |
Casey Schaufler | 6d3dc07 | 2008-12-31 12:54:12 -0500 | [diff] [blame] | 43 | SMK_NETLBLADDR = 8, /* single label hosts */ |
Casey Schaufler | 1544623 | 2008-07-30 15:37:11 -0700 | [diff] [blame] | 44 | SMK_ONLYCAP = 9, /* the only "capable" label */ |
Etienne Basset | ecfcc53 | 2009-04-08 20:40:06 +0200 | [diff] [blame] | 45 | SMK_LOGGING = 10, /* logging */ |
Casey Schaufler | 7898e1f | 2011-01-17 08:05:27 -0800 | [diff] [blame] | 46 | SMK_LOAD_SELF = 11, /* task specific rules */ |
Jarkko Sakkinen | 828716c | 2011-09-08 10:12:01 +0300 | [diff] [blame] | 47 | SMK_ACCESSES = 12, /* access policy */ |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 48 | }; |
| 49 | |
| 50 | /* |
| 51 | * List locks |
| 52 | */ |
| 53 | static DEFINE_MUTEX(smack_list_lock); |
| 54 | static DEFINE_MUTEX(smack_cipso_lock); |
Casey Schaufler | 4bc87e6 | 2008-02-15 15:24:25 -0800 | [diff] [blame] | 55 | static DEFINE_MUTEX(smack_ambient_lock); |
Casey Schaufler | 6d3dc07 | 2008-12-31 12:54:12 -0500 | [diff] [blame] | 56 | static DEFINE_MUTEX(smk_netlbladdr_lock); |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 57 | |
| 58 | /* |
| 59 | * This is the "ambient" label for network traffic. |
| 60 | * If it isn't somehow marked, use this. |
| 61 | * It can be reset via smackfs/ambient |
| 62 | */ |
| 63 | char *smack_net_ambient = smack_known_floor.smk_known; |
| 64 | |
| 65 | /* |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 66 | * This is the level in a CIPSO header that indicates a |
| 67 | * smack label is contained directly in the category set. |
| 68 | * It can be reset via smackfs/direct |
| 69 | */ |
| 70 | int smack_cipso_direct = SMACK_CIPSO_DIRECT_DEFAULT; |
| 71 | |
Casey Schaufler | 1544623 | 2008-07-30 15:37:11 -0700 | [diff] [blame] | 72 | /* |
| 73 | * Unless a process is running with this label even |
| 74 | * having CAP_MAC_OVERRIDE isn't enough to grant |
| 75 | * privilege to violate MAC policy. If no label is |
| 76 | * designated (the NULL case) capabilities apply to |
| 77 | * everyone. It is expected that the hat (^) label |
| 78 | * will be used if any label is used. |
| 79 | */ |
| 80 | char *smack_onlycap; |
| 81 | |
Casey Schaufler | 6d3dc07 | 2008-12-31 12:54:12 -0500 | [diff] [blame] | 82 | /* |
| 83 | * Certain IP addresses may be designated as single label hosts. |
| 84 | * Packets are sent there unlabeled, but only from tasks that |
| 85 | * can write to the specified label. |
| 86 | */ |
Etienne Basset | 7198e2e | 2009-03-24 20:53:24 +0100 | [diff] [blame] | 87 | |
| 88 | LIST_HEAD(smk_netlbladdr_list); |
Casey Schaufler | 272cd7a | 2011-09-20 12:24:36 -0700 | [diff] [blame] | 89 | |
| 90 | /* |
| 91 | * Rule lists are maintained for each label. |
| 92 | * This master list is just for reading /smack/load. |
| 93 | */ |
| 94 | struct smack_master_list { |
| 95 | struct list_head list; |
| 96 | struct smack_rule *smk_rule; |
| 97 | }; |
| 98 | |
Etienne Basset | 7198e2e | 2009-03-24 20:53:24 +0100 | [diff] [blame] | 99 | LIST_HEAD(smack_rule_list); |
Casey Schaufler | 6d3dc07 | 2008-12-31 12:54:12 -0500 | [diff] [blame] | 100 | |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 101 | static int smk_cipso_doi_value = SMACK_CIPSO_DOI_DEFAULT; |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 102 | |
Etienne Basset | 4303154 | 2009-03-27 17:11:01 -0400 | [diff] [blame] | 103 | const char *smack_cipso_option = SMACK_CIPSO_OPTION; |
| 104 | |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 105 | /* |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 106 | * Values for parsing cipso rules |
| 107 | * SMK_DIGITLEN: Length of a digit field in a rule. |
Ahmed S. Darwish | b500ce8 | 2008-03-13 12:32:34 -0700 | [diff] [blame] | 108 | * SMK_CIPSOMIN: Minimum possible cipso rule length. |
| 109 | * SMK_CIPSOMAX: Maximum possible cipso rule length. |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 110 | */ |
| 111 | #define SMK_DIGITLEN 4 |
Ahmed S. Darwish | b500ce8 | 2008-03-13 12:32:34 -0700 | [diff] [blame] | 112 | #define SMK_CIPSOMIN (SMK_LABELLEN + 2 * SMK_DIGITLEN) |
| 113 | #define SMK_CIPSOMAX (SMK_CIPSOMIN + SMACK_CIPSO_MAXCATNUM * SMK_DIGITLEN) |
| 114 | |
| 115 | /* |
| 116 | * Values for parsing MAC rules |
| 117 | * SMK_ACCESS: Maximum possible combination of access permissions |
| 118 | * SMK_ACCESSLEN: Maximum length for a rule access field |
| 119 | * SMK_LOADLEN: Smack rule length |
| 120 | */ |
Jarkko Sakkinen | 5c6d112 | 2010-12-07 13:34:01 +0200 | [diff] [blame] | 121 | #define SMK_OACCESS "rwxa" |
| 122 | #define SMK_ACCESS "rwxat" |
| 123 | #define SMK_OACCESSLEN (sizeof(SMK_OACCESS) - 1) |
| 124 | #define SMK_ACCESSLEN (sizeof(SMK_ACCESS) - 1) |
| 125 | #define SMK_OLOADLEN (SMK_LABELLEN + SMK_LABELLEN + SMK_OACCESSLEN) |
| 126 | #define SMK_LOADLEN (SMK_LABELLEN + SMK_LABELLEN + SMK_ACCESSLEN) |
Ahmed S. Darwish | b500ce8 | 2008-03-13 12:32:34 -0700 | [diff] [blame] | 127 | |
Casey Schaufler | 6d3dc07 | 2008-12-31 12:54:12 -0500 | [diff] [blame] | 128 | /** |
| 129 | * smk_netlabel_audit_set - fill a netlbl_audit struct |
| 130 | * @nap: structure to fill |
| 131 | */ |
| 132 | static void smk_netlabel_audit_set(struct netlbl_audit *nap) |
| 133 | { |
| 134 | nap->loginuid = audit_get_loginuid(current); |
| 135 | nap->sessionid = audit_get_sessionid(current); |
Casey Schaufler | 676dac4 | 2010-12-02 06:43:39 -0800 | [diff] [blame] | 136 | nap->secid = smack_to_secid(smk_of_current()); |
Casey Schaufler | 6d3dc07 | 2008-12-31 12:54:12 -0500 | [diff] [blame] | 137 | } |
| 138 | |
| 139 | /* |
| 140 | * Values for parsing single label host rules |
| 141 | * "1.2.3.4 X" |
| 142 | * "192.168.138.129/32 abcdefghijklmnopqrstuvw" |
| 143 | */ |
| 144 | #define SMK_NETLBLADDRMIN 9 |
| 145 | #define SMK_NETLBLADDRMAX 42 |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 146 | |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 147 | /** |
| 148 | * smk_set_access - add a rule to the rule list |
| 149 | * @srp: the new rule to add |
Casey Schaufler | 7898e1f | 2011-01-17 08:05:27 -0800 | [diff] [blame] | 150 | * @rule_list: the list of rules |
| 151 | * @rule_lock: the rule list lock |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 152 | * |
| 153 | * Looks through the current subject/object/access list for |
| 154 | * the subject/object pair and replaces the access that was |
| 155 | * there. If the pair isn't found add it with the specified |
| 156 | * access. |
Sergio Luis | 81ea714 | 2008-12-22 01:16:15 -0300 | [diff] [blame] | 157 | * |
Casey Schaufler | 7898e1f | 2011-01-17 08:05:27 -0800 | [diff] [blame] | 158 | * Returns 1 if a rule was found to exist already, 0 if it is new |
Sergio Luis | 81ea714 | 2008-12-22 01:16:15 -0300 | [diff] [blame] | 159 | * Returns 0 if nothing goes wrong or -ENOMEM if it fails |
| 160 | * during the allocation of the new pair to add. |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 161 | */ |
Casey Schaufler | 7898e1f | 2011-01-17 08:05:27 -0800 | [diff] [blame] | 162 | static int smk_set_access(struct smack_rule *srp, struct list_head *rule_list, |
| 163 | struct mutex *rule_lock) |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 164 | { |
Etienne Basset | 7198e2e | 2009-03-24 20:53:24 +0100 | [diff] [blame] | 165 | struct smack_rule *sp; |
Casey Schaufler | 7898e1f | 2011-01-17 08:05:27 -0800 | [diff] [blame] | 166 | int found = 0; |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 167 | |
Casey Schaufler | 7898e1f | 2011-01-17 08:05:27 -0800 | [diff] [blame] | 168 | mutex_lock(rule_lock); |
| 169 | |
Casey Schaufler | 272cd7a | 2011-09-20 12:24:36 -0700 | [diff] [blame] | 170 | /* |
| 171 | * Because the object label is less likely to match |
| 172 | * than the subject label check it first |
| 173 | */ |
Casey Schaufler | 7898e1f | 2011-01-17 08:05:27 -0800 | [diff] [blame] | 174 | list_for_each_entry_rcu(sp, rule_list, list) { |
Casey Schaufler | 272cd7a | 2011-09-20 12:24:36 -0700 | [diff] [blame] | 175 | if (sp->smk_object == srp->smk_object && |
| 176 | sp->smk_subject == srp->smk_subject) { |
Etienne Basset | 7198e2e | 2009-03-24 20:53:24 +0100 | [diff] [blame] | 177 | found = 1; |
| 178 | sp->smk_access = srp->smk_access; |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 179 | break; |
| 180 | } |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 181 | } |
Etienne Basset | 7198e2e | 2009-03-24 20:53:24 +0100 | [diff] [blame] | 182 | if (found == 0) |
Casey Schaufler | 7898e1f | 2011-01-17 08:05:27 -0800 | [diff] [blame] | 183 | list_add_rcu(&srp->list, rule_list); |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 184 | |
Casey Schaufler | 7898e1f | 2011-01-17 08:05:27 -0800 | [diff] [blame] | 185 | mutex_unlock(rule_lock); |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 186 | |
Casey Schaufler | 7898e1f | 2011-01-17 08:05:27 -0800 | [diff] [blame] | 187 | return found; |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 188 | } |
| 189 | |
| 190 | /** |
Jarkko Sakkinen | 0e94ae1 | 2011-10-18 21:21:36 +0300 | [diff] [blame] | 191 | * smk_parse_rule - parse Smack rule from load string |
Jarkko Sakkinen | 828716c | 2011-09-08 10:12:01 +0300 | [diff] [blame] | 192 | * @data: string to be parsed whose size is SMK_LOADLEN |
Jarkko Sakkinen | 0e94ae1 | 2011-10-18 21:21:36 +0300 | [diff] [blame] | 193 | * @rule: Smack rule |
| 194 | * @import: if non-zero, import labels |
Jarkko Sakkinen | 828716c | 2011-09-08 10:12:01 +0300 | [diff] [blame] | 195 | */ |
Jarkko Sakkinen | 0e94ae1 | 2011-10-18 21:21:36 +0300 | [diff] [blame] | 196 | static int smk_parse_rule(const char *data, struct smack_rule *rule, int import) |
Jarkko Sakkinen | 828716c | 2011-09-08 10:12:01 +0300 | [diff] [blame] | 197 | { |
Jarkko Sakkinen | 0e94ae1 | 2011-10-18 21:21:36 +0300 | [diff] [blame] | 198 | char smack[SMK_LABELLEN]; |
| 199 | struct smack_known *skp; |
Jarkko Sakkinen | 828716c | 2011-09-08 10:12:01 +0300 | [diff] [blame] | 200 | |
Jarkko Sakkinen | 0e94ae1 | 2011-10-18 21:21:36 +0300 | [diff] [blame] | 201 | if (import) { |
| 202 | rule->smk_subject = smk_import(data, 0); |
| 203 | if (rule->smk_subject == NULL) |
| 204 | return -1; |
| 205 | |
| 206 | rule->smk_object = smk_import(data + SMK_LABELLEN, 0); |
| 207 | if (rule->smk_object == NULL) |
| 208 | return -1; |
| 209 | } else { |
| 210 | smk_parse_smack(data, 0, smack); |
| 211 | skp = smk_find_entry(smack); |
| 212 | if (skp == NULL) |
| 213 | return -1; |
| 214 | rule->smk_subject = skp->smk_known; |
| 215 | |
| 216 | smk_parse_smack(data + SMK_LABELLEN, 0, smack); |
| 217 | skp = smk_find_entry(smack); |
| 218 | if (skp == NULL) |
| 219 | return -1; |
| 220 | rule->smk_object = skp->smk_known; |
| 221 | } |
Jarkko Sakkinen | 828716c | 2011-09-08 10:12:01 +0300 | [diff] [blame] | 222 | |
| 223 | rule->smk_access = 0; |
| 224 | |
| 225 | switch (data[SMK_LABELLEN + SMK_LABELLEN]) { |
| 226 | case '-': |
| 227 | break; |
| 228 | case 'r': |
| 229 | case 'R': |
| 230 | rule->smk_access |= MAY_READ; |
| 231 | break; |
| 232 | default: |
| 233 | return -1; |
| 234 | } |
| 235 | |
| 236 | switch (data[SMK_LABELLEN + SMK_LABELLEN + 1]) { |
| 237 | case '-': |
| 238 | break; |
| 239 | case 'w': |
| 240 | case 'W': |
| 241 | rule->smk_access |= MAY_WRITE; |
| 242 | break; |
| 243 | default: |
| 244 | return -1; |
| 245 | } |
| 246 | |
| 247 | switch (data[SMK_LABELLEN + SMK_LABELLEN + 2]) { |
| 248 | case '-': |
| 249 | break; |
| 250 | case 'x': |
| 251 | case 'X': |
| 252 | rule->smk_access |= MAY_EXEC; |
| 253 | break; |
| 254 | default: |
| 255 | return -1; |
| 256 | } |
| 257 | |
| 258 | switch (data[SMK_LABELLEN + SMK_LABELLEN + 3]) { |
| 259 | case '-': |
| 260 | break; |
| 261 | case 'a': |
| 262 | case 'A': |
| 263 | rule->smk_access |= MAY_APPEND; |
| 264 | break; |
| 265 | default: |
| 266 | return -1; |
| 267 | } |
| 268 | |
| 269 | switch (data[SMK_LABELLEN + SMK_LABELLEN + 4]) { |
| 270 | case '-': |
| 271 | break; |
| 272 | case 't': |
| 273 | case 'T': |
| 274 | rule->smk_access |= MAY_TRANSMUTE; |
| 275 | break; |
| 276 | default: |
| 277 | return -1; |
| 278 | } |
| 279 | |
| 280 | return 0; |
| 281 | } |
| 282 | |
| 283 | /** |
Casey Schaufler | 7898e1f | 2011-01-17 08:05:27 -0800 | [diff] [blame] | 284 | * smk_write_load_list - write() for any /smack/load |
Randy Dunlap | 251a2a9 | 2009-02-18 11:42:33 -0800 | [diff] [blame] | 285 | * @file: file pointer, not actually used |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 286 | * @buf: where to get the data from |
| 287 | * @count: bytes sent |
| 288 | * @ppos: where to start - must be 0 |
Casey Schaufler | 7898e1f | 2011-01-17 08:05:27 -0800 | [diff] [blame] | 289 | * @rule_list: the list of rules to write to |
| 290 | * @rule_lock: lock for the rule list |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 291 | * |
| 292 | * Get one smack access rule from above. |
| 293 | * The format is exactly: |
| 294 | * char subject[SMK_LABELLEN] |
| 295 | * char object[SMK_LABELLEN] |
Ahmed S. Darwish | b500ce8 | 2008-03-13 12:32:34 -0700 | [diff] [blame] | 296 | * char access[SMK_ACCESSLEN] |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 297 | * |
Ahmed S. Darwish | b500ce8 | 2008-03-13 12:32:34 -0700 | [diff] [blame] | 298 | * writes must be SMK_LABELLEN+SMK_LABELLEN+SMK_ACCESSLEN bytes. |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 299 | */ |
Casey Schaufler | 7898e1f | 2011-01-17 08:05:27 -0800 | [diff] [blame] | 300 | static ssize_t smk_write_load_list(struct file *file, const char __user *buf, |
| 301 | size_t count, loff_t *ppos, |
| 302 | struct list_head *rule_list, |
| 303 | struct mutex *rule_lock) |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 304 | { |
Casey Schaufler | 272cd7a | 2011-09-20 12:24:36 -0700 | [diff] [blame] | 305 | struct smack_master_list *smlp; |
| 306 | struct smack_known *skp; |
Etienne Basset | 7198e2e | 2009-03-24 20:53:24 +0100 | [diff] [blame] | 307 | struct smack_rule *rule; |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 308 | char *data; |
| 309 | int rc = -EINVAL; |
Casey Schaufler | 272cd7a | 2011-09-20 12:24:36 -0700 | [diff] [blame] | 310 | int load = 0; |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 311 | |
| 312 | /* |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 313 | * No partial writes. |
| 314 | * Enough data must be present. |
| 315 | */ |
Jarkko Sakkinen | 5c6d112 | 2010-12-07 13:34:01 +0200 | [diff] [blame] | 316 | if (*ppos != 0) |
| 317 | return -EINVAL; |
| 318 | /* |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 319 | * Minor hack for backward compatibility |
Jarkko Sakkinen | 5c6d112 | 2010-12-07 13:34:01 +0200 | [diff] [blame] | 320 | */ |
| 321 | if (count < (SMK_OLOADLEN) || count > SMK_LOADLEN) |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 322 | return -EINVAL; |
| 323 | |
Jarkko Sakkinen | 5c6d112 | 2010-12-07 13:34:01 +0200 | [diff] [blame] | 324 | data = kzalloc(SMK_LOADLEN, GFP_KERNEL); |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 325 | if (data == NULL) |
| 326 | return -ENOMEM; |
| 327 | |
| 328 | if (copy_from_user(data, buf, count) != 0) { |
| 329 | rc = -EFAULT; |
| 330 | goto out; |
| 331 | } |
| 332 | |
Jarkko Sakkinen | 5c6d112 | 2010-12-07 13:34:01 +0200 | [diff] [blame] | 333 | /* |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 334 | * More on the minor hack for backward compatibility |
Jarkko Sakkinen | 5c6d112 | 2010-12-07 13:34:01 +0200 | [diff] [blame] | 335 | */ |
| 336 | if (count == (SMK_OLOADLEN)) |
| 337 | data[SMK_OLOADLEN] = '-'; |
| 338 | |
Etienne Basset | 7198e2e | 2009-03-24 20:53:24 +0100 | [diff] [blame] | 339 | rule = kzalloc(sizeof(*rule), GFP_KERNEL); |
| 340 | if (rule == NULL) { |
| 341 | rc = -ENOMEM; |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 342 | goto out; |
Etienne Basset | 7198e2e | 2009-03-24 20:53:24 +0100 | [diff] [blame] | 343 | } |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 344 | |
Jarkko Sakkinen | 0e94ae1 | 2011-10-18 21:21:36 +0300 | [diff] [blame] | 345 | if (smk_parse_rule(data, rule, 1)) |
Etienne Basset | 7198e2e | 2009-03-24 20:53:24 +0100 | [diff] [blame] | 346 | goto out_free_rule; |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 347 | |
Casey Schaufler | 272cd7a | 2011-09-20 12:24:36 -0700 | [diff] [blame] | 348 | if (rule_list == NULL) { |
| 349 | load = 1; |
| 350 | skp = smk_find_entry(rule->smk_subject); |
| 351 | rule_list = &skp->smk_rules; |
| 352 | rule_lock = &skp->smk_rules_lock; |
| 353 | } |
| 354 | |
Casey Schaufler | 7898e1f | 2011-01-17 08:05:27 -0800 | [diff] [blame] | 355 | rc = count; |
| 356 | /* |
Casey Schaufler | 4080956 | 2011-11-10 15:02:22 -0800 | [diff] [blame^] | 357 | * If this is "load" as opposed to "load-self" and a new rule |
| 358 | * it needs to get added for reporting. |
Casey Schaufler | 7898e1f | 2011-01-17 08:05:27 -0800 | [diff] [blame] | 359 | * smk_set_access returns true if there was already a rule |
| 360 | * for the subject/object pair, and false if it was new. |
| 361 | */ |
Casey Schaufler | 4080956 | 2011-11-10 15:02:22 -0800 | [diff] [blame^] | 362 | if (load && !smk_set_access(rule, rule_list, rule_lock)) { |
Casey Schaufler | 272cd7a | 2011-09-20 12:24:36 -0700 | [diff] [blame] | 363 | smlp = kzalloc(sizeof(*smlp), GFP_KERNEL); |
| 364 | if (smlp != NULL) { |
| 365 | smlp->smk_rule = rule; |
| 366 | list_add_rcu(&smlp->list, &smack_rule_list); |
| 367 | } else |
| 368 | rc = -ENOMEM; |
Casey Schaufler | 7898e1f | 2011-01-17 08:05:27 -0800 | [diff] [blame] | 369 | goto out; |
Casey Schaufler | 272cd7a | 2011-09-20 12:24:36 -0700 | [diff] [blame] | 370 | } |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 371 | |
Etienne Basset | 7198e2e | 2009-03-24 20:53:24 +0100 | [diff] [blame] | 372 | out_free_rule: |
| 373 | kfree(rule); |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 374 | out: |
| 375 | kfree(data); |
| 376 | return rc; |
| 377 | } |
| 378 | |
Casey Schaufler | 7898e1f | 2011-01-17 08:05:27 -0800 | [diff] [blame] | 379 | /* |
Casey Schaufler | 4080956 | 2011-11-10 15:02:22 -0800 | [diff] [blame^] | 380 | * Core logic for smackfs seq list operations. |
Casey Schaufler | 7898e1f | 2011-01-17 08:05:27 -0800 | [diff] [blame] | 381 | */ |
| 382 | |
Casey Schaufler | 4080956 | 2011-11-10 15:02:22 -0800 | [diff] [blame^] | 383 | static void *smk_seq_start(struct seq_file *s, loff_t *pos, |
| 384 | struct list_head *head) |
Casey Schaufler | 7898e1f | 2011-01-17 08:05:27 -0800 | [diff] [blame] | 385 | { |
Casey Schaufler | 272cd7a | 2011-09-20 12:24:36 -0700 | [diff] [blame] | 386 | struct list_head *list; |
| 387 | |
| 388 | /* |
| 389 | * This is 0 the first time through. |
| 390 | */ |
| 391 | if (s->index == 0) |
Casey Schaufler | 4080956 | 2011-11-10 15:02:22 -0800 | [diff] [blame^] | 392 | s->private = head; |
Casey Schaufler | 272cd7a | 2011-09-20 12:24:36 -0700 | [diff] [blame] | 393 | |
| 394 | if (s->private == NULL) |
Casey Schaufler | 7898e1f | 2011-01-17 08:05:27 -0800 | [diff] [blame] | 395 | return NULL; |
Casey Schaufler | 272cd7a | 2011-09-20 12:24:36 -0700 | [diff] [blame] | 396 | |
| 397 | list = s->private; |
| 398 | if (list_empty(list)) |
Casey Schaufler | 7898e1f | 2011-01-17 08:05:27 -0800 | [diff] [blame] | 399 | return NULL; |
Casey Schaufler | 272cd7a | 2011-09-20 12:24:36 -0700 | [diff] [blame] | 400 | |
| 401 | if (s->index == 0) |
| 402 | return list->next; |
| 403 | return list; |
Casey Schaufler | 7898e1f | 2011-01-17 08:05:27 -0800 | [diff] [blame] | 404 | } |
| 405 | |
Casey Schaufler | 4080956 | 2011-11-10 15:02:22 -0800 | [diff] [blame^] | 406 | static void *smk_seq_next(struct seq_file *s, void *v, loff_t *pos, |
| 407 | struct list_head *head) |
Casey Schaufler | 7898e1f | 2011-01-17 08:05:27 -0800 | [diff] [blame] | 408 | { |
| 409 | struct list_head *list = v; |
| 410 | |
Casey Schaufler | 4080956 | 2011-11-10 15:02:22 -0800 | [diff] [blame^] | 411 | if (list_is_last(list, head)) { |
Casey Schaufler | 272cd7a | 2011-09-20 12:24:36 -0700 | [diff] [blame] | 412 | s->private = NULL; |
Casey Schaufler | 7898e1f | 2011-01-17 08:05:27 -0800 | [diff] [blame] | 413 | return NULL; |
| 414 | } |
Casey Schaufler | 272cd7a | 2011-09-20 12:24:36 -0700 | [diff] [blame] | 415 | s->private = list->next; |
Casey Schaufler | 7898e1f | 2011-01-17 08:05:27 -0800 | [diff] [blame] | 416 | return list->next; |
| 417 | } |
| 418 | |
Casey Schaufler | 4080956 | 2011-11-10 15:02:22 -0800 | [diff] [blame^] | 419 | static void smk_seq_stop(struct seq_file *s, void *v) |
| 420 | { |
| 421 | /* No-op */ |
| 422 | } |
| 423 | |
| 424 | /* |
| 425 | * Seq_file read operations for /smack/load |
| 426 | */ |
| 427 | |
| 428 | static void *load_seq_start(struct seq_file *s, loff_t *pos) |
| 429 | { |
| 430 | return smk_seq_start(s, pos, &smack_rule_list); |
| 431 | } |
| 432 | |
| 433 | static void *load_seq_next(struct seq_file *s, void *v, loff_t *pos) |
| 434 | { |
| 435 | return smk_seq_next(s, v, pos, &smack_rule_list); |
| 436 | } |
| 437 | |
Casey Schaufler | 7898e1f | 2011-01-17 08:05:27 -0800 | [diff] [blame] | 438 | static int load_seq_show(struct seq_file *s, void *v) |
| 439 | { |
| 440 | struct list_head *list = v; |
Casey Schaufler | 272cd7a | 2011-09-20 12:24:36 -0700 | [diff] [blame] | 441 | struct smack_master_list *smlp = |
| 442 | list_entry(list, struct smack_master_list, list); |
| 443 | struct smack_rule *srp = smlp->smk_rule; |
Casey Schaufler | 7898e1f | 2011-01-17 08:05:27 -0800 | [diff] [blame] | 444 | |
| 445 | seq_printf(s, "%s %s", (char *)srp->smk_subject, |
| 446 | (char *)srp->smk_object); |
| 447 | |
| 448 | seq_putc(s, ' '); |
| 449 | |
| 450 | if (srp->smk_access & MAY_READ) |
| 451 | seq_putc(s, 'r'); |
| 452 | if (srp->smk_access & MAY_WRITE) |
| 453 | seq_putc(s, 'w'); |
| 454 | if (srp->smk_access & MAY_EXEC) |
| 455 | seq_putc(s, 'x'); |
| 456 | if (srp->smk_access & MAY_APPEND) |
| 457 | seq_putc(s, 'a'); |
| 458 | if (srp->smk_access & MAY_TRANSMUTE) |
| 459 | seq_putc(s, 't'); |
| 460 | if (srp->smk_access == 0) |
| 461 | seq_putc(s, '-'); |
| 462 | |
| 463 | seq_putc(s, '\n'); |
| 464 | |
| 465 | return 0; |
| 466 | } |
| 467 | |
Casey Schaufler | 7898e1f | 2011-01-17 08:05:27 -0800 | [diff] [blame] | 468 | static const struct seq_operations load_seq_ops = { |
| 469 | .start = load_seq_start, |
| 470 | .next = load_seq_next, |
| 471 | .show = load_seq_show, |
Casey Schaufler | 4080956 | 2011-11-10 15:02:22 -0800 | [diff] [blame^] | 472 | .stop = smk_seq_stop, |
Casey Schaufler | 7898e1f | 2011-01-17 08:05:27 -0800 | [diff] [blame] | 473 | }; |
| 474 | |
| 475 | /** |
| 476 | * smk_open_load - open() for /smack/load |
| 477 | * @inode: inode structure representing file |
| 478 | * @file: "load" file pointer |
| 479 | * |
| 480 | * For reading, use load_seq_* seq_file reading operations. |
| 481 | */ |
| 482 | static int smk_open_load(struct inode *inode, struct file *file) |
| 483 | { |
| 484 | return seq_open(file, &load_seq_ops); |
| 485 | } |
| 486 | |
| 487 | /** |
| 488 | * smk_write_load - write() for /smack/load |
| 489 | * @file: file pointer, not actually used |
| 490 | * @buf: where to get the data from |
| 491 | * @count: bytes sent |
| 492 | * @ppos: where to start - must be 0 |
| 493 | * |
| 494 | */ |
| 495 | static ssize_t smk_write_load(struct file *file, const char __user *buf, |
| 496 | size_t count, loff_t *ppos) |
| 497 | { |
| 498 | |
| 499 | /* |
| 500 | * Must have privilege. |
| 501 | * No partial writes. |
| 502 | * Enough data must be present. |
| 503 | */ |
| 504 | if (!capable(CAP_MAC_ADMIN)) |
| 505 | return -EPERM; |
| 506 | |
Casey Schaufler | 272cd7a | 2011-09-20 12:24:36 -0700 | [diff] [blame] | 507 | return smk_write_load_list(file, buf, count, ppos, NULL, NULL); |
Casey Schaufler | 7898e1f | 2011-01-17 08:05:27 -0800 | [diff] [blame] | 508 | } |
| 509 | |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 510 | static const struct file_operations smk_load_ops = { |
| 511 | .open = smk_open_load, |
| 512 | .read = seq_read, |
| 513 | .llseek = seq_lseek, |
| 514 | .write = smk_write_load, |
Ahmed S. Darwish | cb622bb | 2008-03-24 12:29:49 -0700 | [diff] [blame] | 515 | .release = seq_release, |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 516 | }; |
| 517 | |
| 518 | /** |
| 519 | * smk_cipso_doi - initialize the CIPSO domain |
| 520 | */ |
Casey Schaufler | 30aa4fa | 2008-04-28 02:13:43 -0700 | [diff] [blame] | 521 | static void smk_cipso_doi(void) |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 522 | { |
| 523 | int rc; |
| 524 | struct cipso_v4_doi *doip; |
Casey Schaufler | 6d3dc07 | 2008-12-31 12:54:12 -0500 | [diff] [blame] | 525 | struct netlbl_audit nai; |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 526 | |
Casey Schaufler | 6d3dc07 | 2008-12-31 12:54:12 -0500 | [diff] [blame] | 527 | smk_netlabel_audit_set(&nai); |
Casey Schaufler | 4bc87e6 | 2008-02-15 15:24:25 -0800 | [diff] [blame] | 528 | |
Casey Schaufler | 6d3dc07 | 2008-12-31 12:54:12 -0500 | [diff] [blame] | 529 | rc = netlbl_cfg_map_del(NULL, PF_INET, NULL, NULL, &nai); |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 530 | if (rc != 0) |
| 531 | printk(KERN_WARNING "%s:%d remove rc = %d\n", |
| 532 | __func__, __LINE__, rc); |
| 533 | |
| 534 | doip = kmalloc(sizeof(struct cipso_v4_doi), GFP_KERNEL); |
| 535 | if (doip == NULL) |
| 536 | panic("smack: Failed to initialize cipso DOI.\n"); |
| 537 | doip->map.std = NULL; |
| 538 | doip->doi = smk_cipso_doi_value; |
| 539 | doip->type = CIPSO_V4_MAP_PASS; |
| 540 | doip->tags[0] = CIPSO_V4_TAG_RBITMAP; |
| 541 | for (rc = 1; rc < CIPSO_V4_TAG_MAXCNT; rc++) |
| 542 | doip->tags[rc] = CIPSO_V4_TAG_INVALID; |
| 543 | |
Casey Schaufler | 6d3dc07 | 2008-12-31 12:54:12 -0500 | [diff] [blame] | 544 | rc = netlbl_cfg_cipsov4_add(doip, &nai); |
Paul Moore | b1edeb1 | 2008-10-10 10:16:31 -0400 | [diff] [blame] | 545 | if (rc != 0) { |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 546 | printk(KERN_WARNING "%s:%d cipso add rc = %d\n", |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 547 | __func__, __LINE__, rc); |
Paul Moore | b1edeb1 | 2008-10-10 10:16:31 -0400 | [diff] [blame] | 548 | kfree(doip); |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 549 | return; |
| 550 | } |
Casey Schaufler | 6d3dc07 | 2008-12-31 12:54:12 -0500 | [diff] [blame] | 551 | rc = netlbl_cfg_cipsov4_map_add(doip->doi, NULL, NULL, NULL, &nai); |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 552 | if (rc != 0) { |
| 553 | printk(KERN_WARNING "%s:%d map add rc = %d\n", |
| 554 | __func__, __LINE__, rc); |
| 555 | kfree(doip); |
| 556 | return; |
Paul Moore | b1edeb1 | 2008-10-10 10:16:31 -0400 | [diff] [blame] | 557 | } |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 558 | } |
| 559 | |
Casey Schaufler | 4bc87e6 | 2008-02-15 15:24:25 -0800 | [diff] [blame] | 560 | /** |
| 561 | * smk_unlbl_ambient - initialize the unlabeled domain |
Randy Dunlap | 251a2a9 | 2009-02-18 11:42:33 -0800 | [diff] [blame] | 562 | * @oldambient: previous domain string |
Casey Schaufler | 4bc87e6 | 2008-02-15 15:24:25 -0800 | [diff] [blame] | 563 | */ |
Casey Schaufler | 30aa4fa | 2008-04-28 02:13:43 -0700 | [diff] [blame] | 564 | static void smk_unlbl_ambient(char *oldambient) |
Casey Schaufler | 4bc87e6 | 2008-02-15 15:24:25 -0800 | [diff] [blame] | 565 | { |
| 566 | int rc; |
Casey Schaufler | 6d3dc07 | 2008-12-31 12:54:12 -0500 | [diff] [blame] | 567 | struct netlbl_audit nai; |
Casey Schaufler | 4bc87e6 | 2008-02-15 15:24:25 -0800 | [diff] [blame] | 568 | |
Casey Schaufler | 6d3dc07 | 2008-12-31 12:54:12 -0500 | [diff] [blame] | 569 | smk_netlabel_audit_set(&nai); |
Casey Schaufler | 4bc87e6 | 2008-02-15 15:24:25 -0800 | [diff] [blame] | 570 | |
| 571 | if (oldambient != NULL) { |
Casey Schaufler | 6d3dc07 | 2008-12-31 12:54:12 -0500 | [diff] [blame] | 572 | rc = netlbl_cfg_map_del(oldambient, PF_INET, NULL, NULL, &nai); |
Casey Schaufler | 4bc87e6 | 2008-02-15 15:24:25 -0800 | [diff] [blame] | 573 | if (rc != 0) |
| 574 | printk(KERN_WARNING "%s:%d remove rc = %d\n", |
| 575 | __func__, __LINE__, rc); |
| 576 | } |
| 577 | |
Casey Schaufler | 6d3dc07 | 2008-12-31 12:54:12 -0500 | [diff] [blame] | 578 | rc = netlbl_cfg_unlbl_map_add(smack_net_ambient, PF_INET, |
| 579 | NULL, NULL, &nai); |
Casey Schaufler | 4bc87e6 | 2008-02-15 15:24:25 -0800 | [diff] [blame] | 580 | if (rc != 0) |
| 581 | printk(KERN_WARNING "%s:%d add rc = %d\n", |
| 582 | __func__, __LINE__, rc); |
| 583 | } |
| 584 | |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 585 | /* |
| 586 | * Seq_file read operations for /smack/cipso |
| 587 | */ |
| 588 | |
| 589 | static void *cipso_seq_start(struct seq_file *s, loff_t *pos) |
| 590 | { |
Casey Schaufler | 4080956 | 2011-11-10 15:02:22 -0800 | [diff] [blame^] | 591 | return smk_seq_start(s, pos, &smack_known_list); |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 592 | } |
| 593 | |
| 594 | static void *cipso_seq_next(struct seq_file *s, void *v, loff_t *pos) |
| 595 | { |
Casey Schaufler | 4080956 | 2011-11-10 15:02:22 -0800 | [diff] [blame^] | 596 | return smk_seq_next(s, v, pos, &smack_known_list); |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 597 | } |
| 598 | |
| 599 | /* |
| 600 | * Print cipso labels in format: |
| 601 | * label level[/cat[,cat]] |
| 602 | */ |
| 603 | static int cipso_seq_show(struct seq_file *s, void *v) |
| 604 | { |
Etienne Basset | 7198e2e | 2009-03-24 20:53:24 +0100 | [diff] [blame] | 605 | struct list_head *list = v; |
| 606 | struct smack_known *skp = |
| 607 | list_entry(list, struct smack_known, list); |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 608 | struct smack_cipso *scp = skp->smk_cipso; |
| 609 | char *cbp; |
| 610 | char sep = '/'; |
| 611 | int cat = 1; |
| 612 | int i; |
| 613 | unsigned char m; |
| 614 | |
| 615 | if (scp == NULL) |
| 616 | return 0; |
| 617 | |
| 618 | seq_printf(s, "%s %3d", (char *)&skp->smk_known, scp->smk_level); |
| 619 | |
| 620 | cbp = scp->smk_catset; |
| 621 | for (i = 0; i < SMK_LABELLEN; i++) |
| 622 | for (m = 0x80; m != 0; m >>= 1) { |
| 623 | if (m & cbp[i]) { |
| 624 | seq_printf(s, "%c%d", sep, cat); |
| 625 | sep = ','; |
| 626 | } |
| 627 | cat++; |
| 628 | } |
| 629 | |
| 630 | seq_putc(s, '\n'); |
| 631 | |
| 632 | return 0; |
| 633 | } |
| 634 | |
James Morris | 88e9d34 | 2009-09-22 16:43:43 -0700 | [diff] [blame] | 635 | static const struct seq_operations cipso_seq_ops = { |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 636 | .start = cipso_seq_start, |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 637 | .next = cipso_seq_next, |
| 638 | .show = cipso_seq_show, |
Casey Schaufler | 4080956 | 2011-11-10 15:02:22 -0800 | [diff] [blame^] | 639 | .stop = smk_seq_stop, |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 640 | }; |
| 641 | |
| 642 | /** |
| 643 | * smk_open_cipso - open() for /smack/cipso |
| 644 | * @inode: inode structure representing file |
| 645 | * @file: "cipso" file pointer |
| 646 | * |
| 647 | * Connect our cipso_seq_* operations with /smack/cipso |
| 648 | * file_operations |
| 649 | */ |
| 650 | static int smk_open_cipso(struct inode *inode, struct file *file) |
| 651 | { |
| 652 | return seq_open(file, &cipso_seq_ops); |
| 653 | } |
| 654 | |
| 655 | /** |
| 656 | * smk_write_cipso - write() for /smack/cipso |
Randy Dunlap | 251a2a9 | 2009-02-18 11:42:33 -0800 | [diff] [blame] | 657 | * @file: file pointer, not actually used |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 658 | * @buf: where to get the data from |
| 659 | * @count: bytes sent |
| 660 | * @ppos: where to start |
| 661 | * |
| 662 | * Accepts only one cipso rule per write call. |
| 663 | * Returns number of bytes written or error code, as appropriate |
| 664 | */ |
| 665 | static ssize_t smk_write_cipso(struct file *file, const char __user *buf, |
| 666 | size_t count, loff_t *ppos) |
| 667 | { |
| 668 | struct smack_known *skp; |
| 669 | struct smack_cipso *scp = NULL; |
| 670 | char mapcatset[SMK_LABELLEN]; |
| 671 | int maplevel; |
| 672 | int cat; |
| 673 | int catlen; |
| 674 | ssize_t rc = -EINVAL; |
| 675 | char *data = NULL; |
| 676 | char *rule; |
| 677 | int ret; |
| 678 | int i; |
| 679 | |
| 680 | /* |
| 681 | * Must have privilege. |
| 682 | * No partial writes. |
| 683 | * Enough data must be present. |
| 684 | */ |
| 685 | if (!capable(CAP_MAC_ADMIN)) |
| 686 | return -EPERM; |
| 687 | if (*ppos != 0) |
| 688 | return -EINVAL; |
Ahmed S. Darwish | b500ce8 | 2008-03-13 12:32:34 -0700 | [diff] [blame] | 689 | if (count < SMK_CIPSOMIN || count > SMK_CIPSOMAX) |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 690 | return -EINVAL; |
| 691 | |
| 692 | data = kzalloc(count + 1, GFP_KERNEL); |
| 693 | if (data == NULL) |
| 694 | return -ENOMEM; |
| 695 | |
| 696 | if (copy_from_user(data, buf, count) != 0) { |
| 697 | rc = -EFAULT; |
| 698 | goto unlockedout; |
| 699 | } |
| 700 | |
Etienne Basset | 4303154 | 2009-03-27 17:11:01 -0400 | [diff] [blame] | 701 | /* labels cannot begin with a '-' */ |
| 702 | if (data[0] == '-') { |
| 703 | rc = -EINVAL; |
| 704 | goto unlockedout; |
| 705 | } |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 706 | data[count] = '\0'; |
| 707 | rule = data; |
| 708 | /* |
| 709 | * Only allow one writer at a time. Writes should be |
| 710 | * quite rare and small in any case. |
| 711 | */ |
| 712 | mutex_lock(&smack_cipso_lock); |
| 713 | |
| 714 | skp = smk_import_entry(rule, 0); |
| 715 | if (skp == NULL) |
| 716 | goto out; |
| 717 | |
Fernando Carrijo | c19a28e | 2009-01-07 18:09:08 -0800 | [diff] [blame] | 718 | rule += SMK_LABELLEN; |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 719 | ret = sscanf(rule, "%d", &maplevel); |
| 720 | if (ret != 1 || maplevel > SMACK_CIPSO_MAXLEVEL) |
| 721 | goto out; |
| 722 | |
| 723 | rule += SMK_DIGITLEN; |
| 724 | ret = sscanf(rule, "%d", &catlen); |
| 725 | if (ret != 1 || catlen > SMACK_CIPSO_MAXCATNUM) |
| 726 | goto out; |
| 727 | |
Ahmed S. Darwish | b500ce8 | 2008-03-13 12:32:34 -0700 | [diff] [blame] | 728 | if (count != (SMK_CIPSOMIN + catlen * SMK_DIGITLEN)) |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 729 | goto out; |
| 730 | |
| 731 | memset(mapcatset, 0, sizeof(mapcatset)); |
| 732 | |
| 733 | for (i = 0; i < catlen; i++) { |
| 734 | rule += SMK_DIGITLEN; |
| 735 | ret = sscanf(rule, "%d", &cat); |
| 736 | if (ret != 1 || cat > SMACK_CIPSO_MAXCATVAL) |
| 737 | goto out; |
| 738 | |
| 739 | smack_catset_bit(cat, mapcatset); |
| 740 | } |
| 741 | |
| 742 | if (skp->smk_cipso == NULL) { |
| 743 | scp = kzalloc(sizeof(struct smack_cipso), GFP_KERNEL); |
| 744 | if (scp == NULL) { |
| 745 | rc = -ENOMEM; |
| 746 | goto out; |
| 747 | } |
| 748 | } |
| 749 | |
| 750 | spin_lock_bh(&skp->smk_cipsolock); |
| 751 | |
| 752 | if (scp == NULL) |
| 753 | scp = skp->smk_cipso; |
| 754 | else |
| 755 | skp->smk_cipso = scp; |
| 756 | |
| 757 | scp->smk_level = maplevel; |
| 758 | memcpy(scp->smk_catset, mapcatset, sizeof(mapcatset)); |
| 759 | |
| 760 | spin_unlock_bh(&skp->smk_cipsolock); |
| 761 | |
| 762 | rc = count; |
| 763 | out: |
| 764 | mutex_unlock(&smack_cipso_lock); |
| 765 | unlockedout: |
| 766 | kfree(data); |
| 767 | return rc; |
| 768 | } |
| 769 | |
| 770 | static const struct file_operations smk_cipso_ops = { |
| 771 | .open = smk_open_cipso, |
| 772 | .read = seq_read, |
| 773 | .llseek = seq_lseek, |
| 774 | .write = smk_write_cipso, |
| 775 | .release = seq_release, |
| 776 | }; |
| 777 | |
Casey Schaufler | 6d3dc07 | 2008-12-31 12:54:12 -0500 | [diff] [blame] | 778 | /* |
| 779 | * Seq_file read operations for /smack/netlabel |
| 780 | */ |
| 781 | |
| 782 | static void *netlbladdr_seq_start(struct seq_file *s, loff_t *pos) |
| 783 | { |
Casey Schaufler | 4080956 | 2011-11-10 15:02:22 -0800 | [diff] [blame^] | 784 | return smk_seq_start(s, pos, &smk_netlbladdr_list); |
Casey Schaufler | 6d3dc07 | 2008-12-31 12:54:12 -0500 | [diff] [blame] | 785 | } |
| 786 | |
| 787 | static void *netlbladdr_seq_next(struct seq_file *s, void *v, loff_t *pos) |
| 788 | { |
Casey Schaufler | 4080956 | 2011-11-10 15:02:22 -0800 | [diff] [blame^] | 789 | return smk_seq_next(s, v, pos, &smk_netlbladdr_list); |
Casey Schaufler | 6d3dc07 | 2008-12-31 12:54:12 -0500 | [diff] [blame] | 790 | } |
Casey Schaufler | 6d3dc07 | 2008-12-31 12:54:12 -0500 | [diff] [blame] | 791 | #define BEBITS (sizeof(__be32) * 8) |
| 792 | |
| 793 | /* |
| 794 | * Print host/label pairs |
| 795 | */ |
| 796 | static int netlbladdr_seq_show(struct seq_file *s, void *v) |
| 797 | { |
Etienne Basset | 7198e2e | 2009-03-24 20:53:24 +0100 | [diff] [blame] | 798 | struct list_head *list = v; |
| 799 | struct smk_netlbladdr *skp = |
| 800 | list_entry(list, struct smk_netlbladdr, list); |
Casey Schaufler | 6d3dc07 | 2008-12-31 12:54:12 -0500 | [diff] [blame] | 801 | unsigned char *hp = (char *) &skp->smk_host.sin_addr.s_addr; |
etienne | 113a0e4 | 2009-03-04 07:33:51 +0100 | [diff] [blame] | 802 | int maskn; |
| 803 | u32 temp_mask = be32_to_cpu(skp->smk_mask.s_addr); |
Casey Schaufler | 6d3dc07 | 2008-12-31 12:54:12 -0500 | [diff] [blame] | 804 | |
etienne | 113a0e4 | 2009-03-04 07:33:51 +0100 | [diff] [blame] | 805 | for (maskn = 0; temp_mask; temp_mask <<= 1, maskn++); |
Casey Schaufler | 6d3dc07 | 2008-12-31 12:54:12 -0500 | [diff] [blame] | 806 | |
| 807 | seq_printf(s, "%u.%u.%u.%u/%d %s\n", |
| 808 | hp[0], hp[1], hp[2], hp[3], maskn, skp->smk_label); |
| 809 | |
| 810 | return 0; |
| 811 | } |
| 812 | |
James Morris | 88e9d34 | 2009-09-22 16:43:43 -0700 | [diff] [blame] | 813 | static const struct seq_operations netlbladdr_seq_ops = { |
Casey Schaufler | 6d3dc07 | 2008-12-31 12:54:12 -0500 | [diff] [blame] | 814 | .start = netlbladdr_seq_start, |
Casey Schaufler | 6d3dc07 | 2008-12-31 12:54:12 -0500 | [diff] [blame] | 815 | .next = netlbladdr_seq_next, |
| 816 | .show = netlbladdr_seq_show, |
Casey Schaufler | 4080956 | 2011-11-10 15:02:22 -0800 | [diff] [blame^] | 817 | .stop = smk_seq_stop, |
Casey Schaufler | 6d3dc07 | 2008-12-31 12:54:12 -0500 | [diff] [blame] | 818 | }; |
| 819 | |
| 820 | /** |
| 821 | * smk_open_netlbladdr - open() for /smack/netlabel |
| 822 | * @inode: inode structure representing file |
| 823 | * @file: "netlabel" file pointer |
| 824 | * |
| 825 | * Connect our netlbladdr_seq_* operations with /smack/netlabel |
| 826 | * file_operations |
| 827 | */ |
| 828 | static int smk_open_netlbladdr(struct inode *inode, struct file *file) |
| 829 | { |
| 830 | return seq_open(file, &netlbladdr_seq_ops); |
| 831 | } |
| 832 | |
| 833 | /** |
etienne | 113a0e4 | 2009-03-04 07:33:51 +0100 | [diff] [blame] | 834 | * smk_netlbladdr_insert |
| 835 | * @new : netlabel to insert |
| 836 | * |
| 837 | * This helper insert netlabel in the smack_netlbladdrs list |
| 838 | * sorted by netmask length (longest to smallest) |
Etienne Basset | 7198e2e | 2009-03-24 20:53:24 +0100 | [diff] [blame] | 839 | * locked by &smk_netlbladdr_lock in smk_write_netlbladdr |
| 840 | * |
etienne | 113a0e4 | 2009-03-04 07:33:51 +0100 | [diff] [blame] | 841 | */ |
| 842 | static void smk_netlbladdr_insert(struct smk_netlbladdr *new) |
| 843 | { |
Etienne Basset | 7198e2e | 2009-03-24 20:53:24 +0100 | [diff] [blame] | 844 | struct smk_netlbladdr *m, *m_next; |
etienne | 113a0e4 | 2009-03-04 07:33:51 +0100 | [diff] [blame] | 845 | |
Etienne Basset | 7198e2e | 2009-03-24 20:53:24 +0100 | [diff] [blame] | 846 | if (list_empty(&smk_netlbladdr_list)) { |
| 847 | list_add_rcu(&new->list, &smk_netlbladdr_list); |
etienne | 113a0e4 | 2009-03-04 07:33:51 +0100 | [diff] [blame] | 848 | return; |
| 849 | } |
| 850 | |
Jiri Pirko | 05725f7 | 2009-04-14 20:17:16 +0200 | [diff] [blame] | 851 | m = list_entry_rcu(smk_netlbladdr_list.next, |
| 852 | struct smk_netlbladdr, list); |
Etienne Basset | 7198e2e | 2009-03-24 20:53:24 +0100 | [diff] [blame] | 853 | |
etienne | 113a0e4 | 2009-03-04 07:33:51 +0100 | [diff] [blame] | 854 | /* the comparison '>' is a bit hacky, but works */ |
Etienne Basset | 7198e2e | 2009-03-24 20:53:24 +0100 | [diff] [blame] | 855 | if (new->smk_mask.s_addr > m->smk_mask.s_addr) { |
| 856 | list_add_rcu(&new->list, &smk_netlbladdr_list); |
etienne | 113a0e4 | 2009-03-04 07:33:51 +0100 | [diff] [blame] | 857 | return; |
| 858 | } |
Etienne Basset | 7198e2e | 2009-03-24 20:53:24 +0100 | [diff] [blame] | 859 | |
| 860 | list_for_each_entry_rcu(m, &smk_netlbladdr_list, list) { |
| 861 | if (list_is_last(&m->list, &smk_netlbladdr_list)) { |
| 862 | list_add_rcu(&new->list, &m->list); |
etienne | 113a0e4 | 2009-03-04 07:33:51 +0100 | [diff] [blame] | 863 | return; |
| 864 | } |
Jiri Pirko | 05725f7 | 2009-04-14 20:17:16 +0200 | [diff] [blame] | 865 | m_next = list_entry_rcu(m->list.next, |
| 866 | struct smk_netlbladdr, list); |
Etienne Basset | 7198e2e | 2009-03-24 20:53:24 +0100 | [diff] [blame] | 867 | if (new->smk_mask.s_addr > m_next->smk_mask.s_addr) { |
| 868 | list_add_rcu(&new->list, &m->list); |
etienne | 113a0e4 | 2009-03-04 07:33:51 +0100 | [diff] [blame] | 869 | return; |
| 870 | } |
| 871 | } |
| 872 | } |
| 873 | |
| 874 | |
| 875 | /** |
Casey Schaufler | 6d3dc07 | 2008-12-31 12:54:12 -0500 | [diff] [blame] | 876 | * smk_write_netlbladdr - write() for /smack/netlabel |
Randy Dunlap | 251a2a9 | 2009-02-18 11:42:33 -0800 | [diff] [blame] | 877 | * @file: file pointer, not actually used |
Casey Schaufler | 6d3dc07 | 2008-12-31 12:54:12 -0500 | [diff] [blame] | 878 | * @buf: where to get the data from |
| 879 | * @count: bytes sent |
| 880 | * @ppos: where to start |
| 881 | * |
| 882 | * Accepts only one netlbladdr per write call. |
| 883 | * Returns number of bytes written or error code, as appropriate |
| 884 | */ |
| 885 | static ssize_t smk_write_netlbladdr(struct file *file, const char __user *buf, |
| 886 | size_t count, loff_t *ppos) |
| 887 | { |
| 888 | struct smk_netlbladdr *skp; |
| 889 | struct sockaddr_in newname; |
| 890 | char smack[SMK_LABELLEN]; |
| 891 | char *sp; |
Roel Kluin | 6470c07 | 2009-05-21 18:42:54 +0200 | [diff] [blame] | 892 | char data[SMK_NETLBLADDRMAX + 1]; |
Casey Schaufler | 6d3dc07 | 2008-12-31 12:54:12 -0500 | [diff] [blame] | 893 | char *host = (char *)&newname.sin_addr.s_addr; |
| 894 | int rc; |
| 895 | struct netlbl_audit audit_info; |
| 896 | struct in_addr mask; |
| 897 | unsigned int m; |
Etienne Basset | 7198e2e | 2009-03-24 20:53:24 +0100 | [diff] [blame] | 898 | int found; |
etienne | 113a0e4 | 2009-03-04 07:33:51 +0100 | [diff] [blame] | 899 | u32 mask_bits = (1<<31); |
Casey Schaufler | 6d3dc07 | 2008-12-31 12:54:12 -0500 | [diff] [blame] | 900 | __be32 nsa; |
etienne | 113a0e4 | 2009-03-04 07:33:51 +0100 | [diff] [blame] | 901 | u32 temp_mask; |
Casey Schaufler | 6d3dc07 | 2008-12-31 12:54:12 -0500 | [diff] [blame] | 902 | |
| 903 | /* |
| 904 | * Must have privilege. |
| 905 | * No partial writes. |
| 906 | * Enough data must be present. |
| 907 | * "<addr/mask, as a.b.c.d/e><space><label>" |
| 908 | * "<addr, as a.b.c.d><space><label>" |
| 909 | */ |
| 910 | if (!capable(CAP_MAC_ADMIN)) |
| 911 | return -EPERM; |
| 912 | if (*ppos != 0) |
| 913 | return -EINVAL; |
| 914 | if (count < SMK_NETLBLADDRMIN || count > SMK_NETLBLADDRMAX) |
| 915 | return -EINVAL; |
| 916 | if (copy_from_user(data, buf, count) != 0) |
| 917 | return -EFAULT; |
| 918 | |
| 919 | data[count] = '\0'; |
| 920 | |
| 921 | rc = sscanf(data, "%hhd.%hhd.%hhd.%hhd/%d %s", |
| 922 | &host[0], &host[1], &host[2], &host[3], &m, smack); |
| 923 | if (rc != 6) { |
| 924 | rc = sscanf(data, "%hhd.%hhd.%hhd.%hhd %s", |
| 925 | &host[0], &host[1], &host[2], &host[3], smack); |
| 926 | if (rc != 5) |
| 927 | return -EINVAL; |
| 928 | m = BEBITS; |
| 929 | } |
| 930 | if (m > BEBITS) |
| 931 | return -EINVAL; |
| 932 | |
Etienne Basset | 4303154 | 2009-03-27 17:11:01 -0400 | [diff] [blame] | 933 | /* if smack begins with '-', its an option, don't import it */ |
| 934 | if (smack[0] != '-') { |
| 935 | sp = smk_import(smack, 0); |
| 936 | if (sp == NULL) |
| 937 | return -EINVAL; |
| 938 | } else { |
| 939 | /* check known options */ |
| 940 | if (strcmp(smack, smack_cipso_option) == 0) |
| 941 | sp = (char *)smack_cipso_option; |
| 942 | else |
| 943 | return -EINVAL; |
| 944 | } |
Casey Schaufler | 6d3dc07 | 2008-12-31 12:54:12 -0500 | [diff] [blame] | 945 | |
etienne | 113a0e4 | 2009-03-04 07:33:51 +0100 | [diff] [blame] | 946 | for (temp_mask = 0; m > 0; m--) { |
| 947 | temp_mask |= mask_bits; |
| 948 | mask_bits >>= 1; |
Casey Schaufler | 6d3dc07 | 2008-12-31 12:54:12 -0500 | [diff] [blame] | 949 | } |
etienne | 113a0e4 | 2009-03-04 07:33:51 +0100 | [diff] [blame] | 950 | mask.s_addr = cpu_to_be32(temp_mask); |
| 951 | |
| 952 | newname.sin_addr.s_addr &= mask.s_addr; |
Casey Schaufler | 6d3dc07 | 2008-12-31 12:54:12 -0500 | [diff] [blame] | 953 | /* |
| 954 | * Only allow one writer at a time. Writes should be |
| 955 | * quite rare and small in any case. |
| 956 | */ |
| 957 | mutex_lock(&smk_netlbladdr_lock); |
| 958 | |
| 959 | nsa = newname.sin_addr.s_addr; |
etienne | 113a0e4 | 2009-03-04 07:33:51 +0100 | [diff] [blame] | 960 | /* try to find if the prefix is already in the list */ |
Etienne Basset | 7198e2e | 2009-03-24 20:53:24 +0100 | [diff] [blame] | 961 | found = 0; |
| 962 | list_for_each_entry_rcu(skp, &smk_netlbladdr_list, list) { |
Casey Schaufler | 6d3dc07 | 2008-12-31 12:54:12 -0500 | [diff] [blame] | 963 | if (skp->smk_host.sin_addr.s_addr == nsa && |
Etienne Basset | 7198e2e | 2009-03-24 20:53:24 +0100 | [diff] [blame] | 964 | skp->smk_mask.s_addr == mask.s_addr) { |
| 965 | found = 1; |
Casey Schaufler | 6d3dc07 | 2008-12-31 12:54:12 -0500 | [diff] [blame] | 966 | break; |
Etienne Basset | 7198e2e | 2009-03-24 20:53:24 +0100 | [diff] [blame] | 967 | } |
| 968 | } |
Casey Schaufler | 6d3dc07 | 2008-12-31 12:54:12 -0500 | [diff] [blame] | 969 | smk_netlabel_audit_set(&audit_info); |
| 970 | |
Etienne Basset | 7198e2e | 2009-03-24 20:53:24 +0100 | [diff] [blame] | 971 | if (found == 0) { |
Casey Schaufler | 6d3dc07 | 2008-12-31 12:54:12 -0500 | [diff] [blame] | 972 | skp = kzalloc(sizeof(*skp), GFP_KERNEL); |
| 973 | if (skp == NULL) |
| 974 | rc = -ENOMEM; |
| 975 | else { |
| 976 | rc = 0; |
| 977 | skp->smk_host.sin_addr.s_addr = newname.sin_addr.s_addr; |
| 978 | skp->smk_mask.s_addr = mask.s_addr; |
Casey Schaufler | 6d3dc07 | 2008-12-31 12:54:12 -0500 | [diff] [blame] | 979 | skp->smk_label = sp; |
etienne | 113a0e4 | 2009-03-04 07:33:51 +0100 | [diff] [blame] | 980 | smk_netlbladdr_insert(skp); |
Casey Schaufler | 6d3dc07 | 2008-12-31 12:54:12 -0500 | [diff] [blame] | 981 | } |
| 982 | } else { |
Etienne Basset | 4303154 | 2009-03-27 17:11:01 -0400 | [diff] [blame] | 983 | /* we delete the unlabeled entry, only if the previous label |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 984 | * wasn't the special CIPSO option */ |
Etienne Basset | 4303154 | 2009-03-27 17:11:01 -0400 | [diff] [blame] | 985 | if (skp->smk_label != smack_cipso_option) |
| 986 | rc = netlbl_cfg_unlbl_static_del(&init_net, NULL, |
| 987 | &skp->smk_host.sin_addr, &skp->smk_mask, |
| 988 | PF_INET, &audit_info); |
| 989 | else |
| 990 | rc = 0; |
Casey Schaufler | 6d3dc07 | 2008-12-31 12:54:12 -0500 | [diff] [blame] | 991 | skp->smk_label = sp; |
| 992 | } |
| 993 | |
| 994 | /* |
| 995 | * Now tell netlabel about the single label nature of |
| 996 | * this host so that incoming packets get labeled. |
Etienne Basset | 4303154 | 2009-03-27 17:11:01 -0400 | [diff] [blame] | 997 | * but only if we didn't get the special CIPSO option |
Casey Schaufler | 6d3dc07 | 2008-12-31 12:54:12 -0500 | [diff] [blame] | 998 | */ |
Etienne Basset | 4303154 | 2009-03-27 17:11:01 -0400 | [diff] [blame] | 999 | if (rc == 0 && sp != smack_cipso_option) |
Casey Schaufler | 6d3dc07 | 2008-12-31 12:54:12 -0500 | [diff] [blame] | 1000 | rc = netlbl_cfg_unlbl_static_add(&init_net, NULL, |
| 1001 | &skp->smk_host.sin_addr, &skp->smk_mask, PF_INET, |
| 1002 | smack_to_secid(skp->smk_label), &audit_info); |
| 1003 | |
| 1004 | if (rc == 0) |
| 1005 | rc = count; |
| 1006 | |
| 1007 | mutex_unlock(&smk_netlbladdr_lock); |
| 1008 | |
| 1009 | return rc; |
| 1010 | } |
| 1011 | |
| 1012 | static const struct file_operations smk_netlbladdr_ops = { |
| 1013 | .open = smk_open_netlbladdr, |
| 1014 | .read = seq_read, |
| 1015 | .llseek = seq_lseek, |
| 1016 | .write = smk_write_netlbladdr, |
| 1017 | .release = seq_release, |
| 1018 | }; |
| 1019 | |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 1020 | /** |
| 1021 | * smk_read_doi - read() for /smack/doi |
| 1022 | * @filp: file pointer, not actually used |
| 1023 | * @buf: where to put the result |
| 1024 | * @count: maximum to send along |
| 1025 | * @ppos: where to start |
| 1026 | * |
| 1027 | * Returns number of bytes read or error code, as appropriate |
| 1028 | */ |
| 1029 | static ssize_t smk_read_doi(struct file *filp, char __user *buf, |
| 1030 | size_t count, loff_t *ppos) |
| 1031 | { |
| 1032 | char temp[80]; |
| 1033 | ssize_t rc; |
| 1034 | |
| 1035 | if (*ppos != 0) |
| 1036 | return 0; |
| 1037 | |
| 1038 | sprintf(temp, "%d", smk_cipso_doi_value); |
| 1039 | rc = simple_read_from_buffer(buf, count, ppos, temp, strlen(temp)); |
| 1040 | |
| 1041 | return rc; |
| 1042 | } |
| 1043 | |
| 1044 | /** |
| 1045 | * smk_write_doi - write() for /smack/doi |
Randy Dunlap | 251a2a9 | 2009-02-18 11:42:33 -0800 | [diff] [blame] | 1046 | * @file: file pointer, not actually used |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 1047 | * @buf: where to get the data from |
| 1048 | * @count: bytes sent |
| 1049 | * @ppos: where to start |
| 1050 | * |
| 1051 | * Returns number of bytes written or error code, as appropriate |
| 1052 | */ |
| 1053 | static ssize_t smk_write_doi(struct file *file, const char __user *buf, |
| 1054 | size_t count, loff_t *ppos) |
| 1055 | { |
| 1056 | char temp[80]; |
| 1057 | int i; |
| 1058 | |
| 1059 | if (!capable(CAP_MAC_ADMIN)) |
| 1060 | return -EPERM; |
| 1061 | |
| 1062 | if (count >= sizeof(temp) || count == 0) |
| 1063 | return -EINVAL; |
| 1064 | |
| 1065 | if (copy_from_user(temp, buf, count) != 0) |
| 1066 | return -EFAULT; |
| 1067 | |
| 1068 | temp[count] = '\0'; |
| 1069 | |
| 1070 | if (sscanf(temp, "%d", &i) != 1) |
| 1071 | return -EINVAL; |
| 1072 | |
| 1073 | smk_cipso_doi_value = i; |
| 1074 | |
| 1075 | smk_cipso_doi(); |
| 1076 | |
| 1077 | return count; |
| 1078 | } |
| 1079 | |
| 1080 | static const struct file_operations smk_doi_ops = { |
| 1081 | .read = smk_read_doi, |
| 1082 | .write = smk_write_doi, |
Arnd Bergmann | 6038f37 | 2010-08-15 18:52:59 +0200 | [diff] [blame] | 1083 | .llseek = default_llseek, |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 1084 | }; |
| 1085 | |
| 1086 | /** |
| 1087 | * smk_read_direct - read() for /smack/direct |
| 1088 | * @filp: file pointer, not actually used |
| 1089 | * @buf: where to put the result |
| 1090 | * @count: maximum to send along |
| 1091 | * @ppos: where to start |
| 1092 | * |
| 1093 | * Returns number of bytes read or error code, as appropriate |
| 1094 | */ |
| 1095 | static ssize_t smk_read_direct(struct file *filp, char __user *buf, |
| 1096 | size_t count, loff_t *ppos) |
| 1097 | { |
| 1098 | char temp[80]; |
| 1099 | ssize_t rc; |
| 1100 | |
| 1101 | if (*ppos != 0) |
| 1102 | return 0; |
| 1103 | |
| 1104 | sprintf(temp, "%d", smack_cipso_direct); |
| 1105 | rc = simple_read_from_buffer(buf, count, ppos, temp, strlen(temp)); |
| 1106 | |
| 1107 | return rc; |
| 1108 | } |
| 1109 | |
| 1110 | /** |
| 1111 | * smk_write_direct - write() for /smack/direct |
Randy Dunlap | 251a2a9 | 2009-02-18 11:42:33 -0800 | [diff] [blame] | 1112 | * @file: file pointer, not actually used |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 1113 | * @buf: where to get the data from |
| 1114 | * @count: bytes sent |
| 1115 | * @ppos: where to start |
| 1116 | * |
| 1117 | * Returns number of bytes written or error code, as appropriate |
| 1118 | */ |
| 1119 | static ssize_t smk_write_direct(struct file *file, const char __user *buf, |
| 1120 | size_t count, loff_t *ppos) |
| 1121 | { |
| 1122 | char temp[80]; |
| 1123 | int i; |
| 1124 | |
| 1125 | if (!capable(CAP_MAC_ADMIN)) |
| 1126 | return -EPERM; |
| 1127 | |
| 1128 | if (count >= sizeof(temp) || count == 0) |
| 1129 | return -EINVAL; |
| 1130 | |
| 1131 | if (copy_from_user(temp, buf, count) != 0) |
| 1132 | return -EFAULT; |
| 1133 | |
| 1134 | temp[count] = '\0'; |
| 1135 | |
| 1136 | if (sscanf(temp, "%d", &i) != 1) |
| 1137 | return -EINVAL; |
| 1138 | |
| 1139 | smack_cipso_direct = i; |
| 1140 | |
| 1141 | return count; |
| 1142 | } |
| 1143 | |
| 1144 | static const struct file_operations smk_direct_ops = { |
| 1145 | .read = smk_read_direct, |
| 1146 | .write = smk_write_direct, |
Arnd Bergmann | 6038f37 | 2010-08-15 18:52:59 +0200 | [diff] [blame] | 1147 | .llseek = default_llseek, |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 1148 | }; |
| 1149 | |
| 1150 | /** |
| 1151 | * smk_read_ambient - read() for /smack/ambient |
| 1152 | * @filp: file pointer, not actually used |
| 1153 | * @buf: where to put the result |
| 1154 | * @cn: maximum to send along |
| 1155 | * @ppos: where to start |
| 1156 | * |
| 1157 | * Returns number of bytes read or error code, as appropriate |
| 1158 | */ |
| 1159 | static ssize_t smk_read_ambient(struct file *filp, char __user *buf, |
| 1160 | size_t cn, loff_t *ppos) |
| 1161 | { |
| 1162 | ssize_t rc; |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 1163 | int asize; |
| 1164 | |
| 1165 | if (*ppos != 0) |
| 1166 | return 0; |
| 1167 | /* |
| 1168 | * Being careful to avoid a problem in the case where |
| 1169 | * smack_net_ambient gets changed in midstream. |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 1170 | */ |
Casey Schaufler | 4bc87e6 | 2008-02-15 15:24:25 -0800 | [diff] [blame] | 1171 | mutex_lock(&smack_ambient_lock); |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 1172 | |
Casey Schaufler | 4bc87e6 | 2008-02-15 15:24:25 -0800 | [diff] [blame] | 1173 | asize = strlen(smack_net_ambient) + 1; |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 1174 | |
Casey Schaufler | 4bc87e6 | 2008-02-15 15:24:25 -0800 | [diff] [blame] | 1175 | if (cn >= asize) |
| 1176 | rc = simple_read_from_buffer(buf, cn, ppos, |
| 1177 | smack_net_ambient, asize); |
| 1178 | else |
| 1179 | rc = -EINVAL; |
| 1180 | |
| 1181 | mutex_unlock(&smack_ambient_lock); |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 1182 | |
| 1183 | return rc; |
| 1184 | } |
| 1185 | |
| 1186 | /** |
| 1187 | * smk_write_ambient - write() for /smack/ambient |
Randy Dunlap | 251a2a9 | 2009-02-18 11:42:33 -0800 | [diff] [blame] | 1188 | * @file: file pointer, not actually used |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 1189 | * @buf: where to get the data from |
| 1190 | * @count: bytes sent |
| 1191 | * @ppos: where to start |
| 1192 | * |
| 1193 | * Returns number of bytes written or error code, as appropriate |
| 1194 | */ |
| 1195 | static ssize_t smk_write_ambient(struct file *file, const char __user *buf, |
| 1196 | size_t count, loff_t *ppos) |
| 1197 | { |
| 1198 | char in[SMK_LABELLEN]; |
Casey Schaufler | 4bc87e6 | 2008-02-15 15:24:25 -0800 | [diff] [blame] | 1199 | char *oldambient; |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 1200 | char *smack; |
| 1201 | |
| 1202 | if (!capable(CAP_MAC_ADMIN)) |
| 1203 | return -EPERM; |
| 1204 | |
| 1205 | if (count >= SMK_LABELLEN) |
| 1206 | return -EINVAL; |
| 1207 | |
| 1208 | if (copy_from_user(in, buf, count) != 0) |
| 1209 | return -EFAULT; |
| 1210 | |
| 1211 | smack = smk_import(in, count); |
| 1212 | if (smack == NULL) |
| 1213 | return -EINVAL; |
| 1214 | |
Casey Schaufler | 4bc87e6 | 2008-02-15 15:24:25 -0800 | [diff] [blame] | 1215 | mutex_lock(&smack_ambient_lock); |
| 1216 | |
| 1217 | oldambient = smack_net_ambient; |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 1218 | smack_net_ambient = smack; |
Casey Schaufler | 4bc87e6 | 2008-02-15 15:24:25 -0800 | [diff] [blame] | 1219 | smk_unlbl_ambient(oldambient); |
| 1220 | |
| 1221 | mutex_unlock(&smack_ambient_lock); |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 1222 | |
| 1223 | return count; |
| 1224 | } |
| 1225 | |
| 1226 | static const struct file_operations smk_ambient_ops = { |
| 1227 | .read = smk_read_ambient, |
| 1228 | .write = smk_write_ambient, |
Arnd Bergmann | 6038f37 | 2010-08-15 18:52:59 +0200 | [diff] [blame] | 1229 | .llseek = default_llseek, |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 1230 | }; |
| 1231 | |
Casey Schaufler | 1544623 | 2008-07-30 15:37:11 -0700 | [diff] [blame] | 1232 | /** |
| 1233 | * smk_read_onlycap - read() for /smack/onlycap |
| 1234 | * @filp: file pointer, not actually used |
| 1235 | * @buf: where to put the result |
| 1236 | * @cn: maximum to send along |
| 1237 | * @ppos: where to start |
| 1238 | * |
| 1239 | * Returns number of bytes read or error code, as appropriate |
| 1240 | */ |
| 1241 | static ssize_t smk_read_onlycap(struct file *filp, char __user *buf, |
| 1242 | size_t cn, loff_t *ppos) |
| 1243 | { |
| 1244 | char *smack = ""; |
| 1245 | ssize_t rc = -EINVAL; |
| 1246 | int asize; |
| 1247 | |
| 1248 | if (*ppos != 0) |
| 1249 | return 0; |
| 1250 | |
| 1251 | if (smack_onlycap != NULL) |
| 1252 | smack = smack_onlycap; |
| 1253 | |
| 1254 | asize = strlen(smack) + 1; |
| 1255 | |
| 1256 | if (cn >= asize) |
| 1257 | rc = simple_read_from_buffer(buf, cn, ppos, smack, asize); |
| 1258 | |
| 1259 | return rc; |
| 1260 | } |
| 1261 | |
| 1262 | /** |
| 1263 | * smk_write_onlycap - write() for /smack/onlycap |
Randy Dunlap | 251a2a9 | 2009-02-18 11:42:33 -0800 | [diff] [blame] | 1264 | * @file: file pointer, not actually used |
Casey Schaufler | 1544623 | 2008-07-30 15:37:11 -0700 | [diff] [blame] | 1265 | * @buf: where to get the data from |
| 1266 | * @count: bytes sent |
| 1267 | * @ppos: where to start |
| 1268 | * |
| 1269 | * Returns number of bytes written or error code, as appropriate |
| 1270 | */ |
| 1271 | static ssize_t smk_write_onlycap(struct file *file, const char __user *buf, |
| 1272 | size_t count, loff_t *ppos) |
| 1273 | { |
| 1274 | char in[SMK_LABELLEN]; |
Casey Schaufler | 676dac4 | 2010-12-02 06:43:39 -0800 | [diff] [blame] | 1275 | char *sp = smk_of_task(current->cred->security); |
Casey Schaufler | 1544623 | 2008-07-30 15:37:11 -0700 | [diff] [blame] | 1276 | |
| 1277 | if (!capable(CAP_MAC_ADMIN)) |
| 1278 | return -EPERM; |
| 1279 | |
| 1280 | /* |
| 1281 | * This can be done using smk_access() but is done |
| 1282 | * explicitly for clarity. The smk_access() implementation |
| 1283 | * would use smk_access(smack_onlycap, MAY_WRITE) |
| 1284 | */ |
| 1285 | if (smack_onlycap != NULL && smack_onlycap != sp) |
| 1286 | return -EPERM; |
| 1287 | |
| 1288 | if (count >= SMK_LABELLEN) |
| 1289 | return -EINVAL; |
| 1290 | |
| 1291 | if (copy_from_user(in, buf, count) != 0) |
| 1292 | return -EFAULT; |
| 1293 | |
| 1294 | /* |
| 1295 | * Should the null string be passed in unset the onlycap value. |
| 1296 | * This seems like something to be careful with as usually |
| 1297 | * smk_import only expects to return NULL for errors. It |
| 1298 | * is usually the case that a nullstring or "\n" would be |
| 1299 | * bad to pass to smk_import but in fact this is useful here. |
| 1300 | */ |
| 1301 | smack_onlycap = smk_import(in, count); |
| 1302 | |
| 1303 | return count; |
| 1304 | } |
| 1305 | |
| 1306 | static const struct file_operations smk_onlycap_ops = { |
| 1307 | .read = smk_read_onlycap, |
| 1308 | .write = smk_write_onlycap, |
Arnd Bergmann | 6038f37 | 2010-08-15 18:52:59 +0200 | [diff] [blame] | 1309 | .llseek = default_llseek, |
Casey Schaufler | 1544623 | 2008-07-30 15:37:11 -0700 | [diff] [blame] | 1310 | }; |
| 1311 | |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 1312 | /** |
Etienne Basset | ecfcc53 | 2009-04-08 20:40:06 +0200 | [diff] [blame] | 1313 | * smk_read_logging - read() for /smack/logging |
| 1314 | * @filp: file pointer, not actually used |
| 1315 | * @buf: where to put the result |
| 1316 | * @cn: maximum to send along |
| 1317 | * @ppos: where to start |
| 1318 | * |
| 1319 | * Returns number of bytes read or error code, as appropriate |
| 1320 | */ |
| 1321 | static ssize_t smk_read_logging(struct file *filp, char __user *buf, |
| 1322 | size_t count, loff_t *ppos) |
| 1323 | { |
| 1324 | char temp[32]; |
| 1325 | ssize_t rc; |
| 1326 | |
| 1327 | if (*ppos != 0) |
| 1328 | return 0; |
| 1329 | |
| 1330 | sprintf(temp, "%d\n", log_policy); |
| 1331 | rc = simple_read_from_buffer(buf, count, ppos, temp, strlen(temp)); |
| 1332 | return rc; |
| 1333 | } |
| 1334 | |
| 1335 | /** |
| 1336 | * smk_write_logging - write() for /smack/logging |
| 1337 | * @file: file pointer, not actually used |
| 1338 | * @buf: where to get the data from |
| 1339 | * @count: bytes sent |
| 1340 | * @ppos: where to start |
| 1341 | * |
| 1342 | * Returns number of bytes written or error code, as appropriate |
| 1343 | */ |
| 1344 | static ssize_t smk_write_logging(struct file *file, const char __user *buf, |
| 1345 | size_t count, loff_t *ppos) |
| 1346 | { |
| 1347 | char temp[32]; |
| 1348 | int i; |
| 1349 | |
| 1350 | if (!capable(CAP_MAC_ADMIN)) |
| 1351 | return -EPERM; |
| 1352 | |
| 1353 | if (count >= sizeof(temp) || count == 0) |
| 1354 | return -EINVAL; |
| 1355 | |
| 1356 | if (copy_from_user(temp, buf, count) != 0) |
| 1357 | return -EFAULT; |
| 1358 | |
| 1359 | temp[count] = '\0'; |
| 1360 | |
| 1361 | if (sscanf(temp, "%d", &i) != 1) |
| 1362 | return -EINVAL; |
| 1363 | if (i < 0 || i > 3) |
| 1364 | return -EINVAL; |
| 1365 | log_policy = i; |
| 1366 | return count; |
| 1367 | } |
| 1368 | |
| 1369 | |
| 1370 | |
| 1371 | static const struct file_operations smk_logging_ops = { |
| 1372 | .read = smk_read_logging, |
| 1373 | .write = smk_write_logging, |
Arnd Bergmann | 6038f37 | 2010-08-15 18:52:59 +0200 | [diff] [blame] | 1374 | .llseek = default_llseek, |
Etienne Basset | ecfcc53 | 2009-04-08 20:40:06 +0200 | [diff] [blame] | 1375 | }; |
Casey Schaufler | 7898e1f | 2011-01-17 08:05:27 -0800 | [diff] [blame] | 1376 | |
| 1377 | /* |
| 1378 | * Seq_file read operations for /smack/load-self |
| 1379 | */ |
| 1380 | |
| 1381 | static void *load_self_seq_start(struct seq_file *s, loff_t *pos) |
| 1382 | { |
| 1383 | struct task_smack *tsp = current_security(); |
| 1384 | |
Casey Schaufler | 4080956 | 2011-11-10 15:02:22 -0800 | [diff] [blame^] | 1385 | return smk_seq_start(s, pos, &tsp->smk_rules); |
Casey Schaufler | 7898e1f | 2011-01-17 08:05:27 -0800 | [diff] [blame] | 1386 | } |
| 1387 | |
| 1388 | static void *load_self_seq_next(struct seq_file *s, void *v, loff_t *pos) |
| 1389 | { |
| 1390 | struct task_smack *tsp = current_security(); |
Casey Schaufler | 7898e1f | 2011-01-17 08:05:27 -0800 | [diff] [blame] | 1391 | |
Casey Schaufler | 4080956 | 2011-11-10 15:02:22 -0800 | [diff] [blame^] | 1392 | return smk_seq_next(s, v, pos, &tsp->smk_rules); |
Casey Schaufler | 7898e1f | 2011-01-17 08:05:27 -0800 | [diff] [blame] | 1393 | } |
| 1394 | |
| 1395 | static int load_self_seq_show(struct seq_file *s, void *v) |
| 1396 | { |
| 1397 | struct list_head *list = v; |
| 1398 | struct smack_rule *srp = |
| 1399 | list_entry(list, struct smack_rule, list); |
| 1400 | |
| 1401 | seq_printf(s, "%s %s", (char *)srp->smk_subject, |
| 1402 | (char *)srp->smk_object); |
| 1403 | |
| 1404 | seq_putc(s, ' '); |
| 1405 | |
| 1406 | if (srp->smk_access & MAY_READ) |
| 1407 | seq_putc(s, 'r'); |
| 1408 | if (srp->smk_access & MAY_WRITE) |
| 1409 | seq_putc(s, 'w'); |
| 1410 | if (srp->smk_access & MAY_EXEC) |
| 1411 | seq_putc(s, 'x'); |
| 1412 | if (srp->smk_access & MAY_APPEND) |
| 1413 | seq_putc(s, 'a'); |
| 1414 | if (srp->smk_access & MAY_TRANSMUTE) |
| 1415 | seq_putc(s, 't'); |
| 1416 | if (srp->smk_access == 0) |
| 1417 | seq_putc(s, '-'); |
| 1418 | |
| 1419 | seq_putc(s, '\n'); |
| 1420 | |
| 1421 | return 0; |
| 1422 | } |
| 1423 | |
Casey Schaufler | 7898e1f | 2011-01-17 08:05:27 -0800 | [diff] [blame] | 1424 | static const struct seq_operations load_self_seq_ops = { |
| 1425 | .start = load_self_seq_start, |
| 1426 | .next = load_self_seq_next, |
| 1427 | .show = load_self_seq_show, |
Casey Schaufler | 4080956 | 2011-11-10 15:02:22 -0800 | [diff] [blame^] | 1428 | .stop = smk_seq_stop, |
Casey Schaufler | 7898e1f | 2011-01-17 08:05:27 -0800 | [diff] [blame] | 1429 | }; |
| 1430 | |
| 1431 | |
| 1432 | /** |
| 1433 | * smk_open_load_self - open() for /smack/load-self |
| 1434 | * @inode: inode structure representing file |
| 1435 | * @file: "load" file pointer |
| 1436 | * |
| 1437 | * For reading, use load_seq_* seq_file reading operations. |
| 1438 | */ |
| 1439 | static int smk_open_load_self(struct inode *inode, struct file *file) |
| 1440 | { |
| 1441 | return seq_open(file, &load_self_seq_ops); |
| 1442 | } |
| 1443 | |
| 1444 | /** |
| 1445 | * smk_write_load_self - write() for /smack/load-self |
| 1446 | * @file: file pointer, not actually used |
| 1447 | * @buf: where to get the data from |
| 1448 | * @count: bytes sent |
| 1449 | * @ppos: where to start - must be 0 |
| 1450 | * |
| 1451 | */ |
| 1452 | static ssize_t smk_write_load_self(struct file *file, const char __user *buf, |
| 1453 | size_t count, loff_t *ppos) |
| 1454 | { |
| 1455 | struct task_smack *tsp = current_security(); |
| 1456 | |
| 1457 | return smk_write_load_list(file, buf, count, ppos, &tsp->smk_rules, |
| 1458 | &tsp->smk_rules_lock); |
| 1459 | } |
| 1460 | |
| 1461 | static const struct file_operations smk_load_self_ops = { |
| 1462 | .open = smk_open_load_self, |
| 1463 | .read = seq_read, |
| 1464 | .llseek = seq_lseek, |
| 1465 | .write = smk_write_load_self, |
| 1466 | .release = seq_release, |
| 1467 | }; |
Jarkko Sakkinen | 828716c | 2011-09-08 10:12:01 +0300 | [diff] [blame] | 1468 | |
| 1469 | /** |
| 1470 | * smk_write_access - handle access check transaction |
| 1471 | * @file: file pointer |
| 1472 | * @buf: data from user space |
| 1473 | * @count: bytes sent |
| 1474 | * @ppos: where to start - must be 0 |
| 1475 | */ |
| 1476 | static ssize_t smk_write_access(struct file *file, const char __user *buf, |
| 1477 | size_t count, loff_t *ppos) |
| 1478 | { |
| 1479 | struct smack_rule rule; |
| 1480 | char *data; |
Jarkko Sakkinen | f8859d9 | 2011-10-10 14:29:28 +0300 | [diff] [blame] | 1481 | int res; |
Jarkko Sakkinen | 828716c | 2011-09-08 10:12:01 +0300 | [diff] [blame] | 1482 | |
Jarkko Sakkinen | 828716c | 2011-09-08 10:12:01 +0300 | [diff] [blame] | 1483 | data = simple_transaction_get(file, buf, count); |
| 1484 | if (IS_ERR(data)) |
| 1485 | return PTR_ERR(data); |
| 1486 | |
Jarkko Sakkinen | 0e94ae1 | 2011-10-18 21:21:36 +0300 | [diff] [blame] | 1487 | if (count < SMK_LOADLEN || smk_parse_rule(data, &rule, 0)) |
Jarkko Sakkinen | 828716c | 2011-09-08 10:12:01 +0300 | [diff] [blame] | 1488 | return -EINVAL; |
| 1489 | |
Jarkko Sakkinen | f8859d9 | 2011-10-10 14:29:28 +0300 | [diff] [blame] | 1490 | res = smk_access(rule.smk_subject, rule.smk_object, rule.smk_access, |
| 1491 | NULL); |
| 1492 | data[0] = res == 0 ? '1' : '0'; |
| 1493 | data[1] = '\0'; |
Jarkko Sakkinen | 828716c | 2011-09-08 10:12:01 +0300 | [diff] [blame] | 1494 | |
Jarkko Sakkinen | d86b2b6 | 2011-10-18 14:34:28 +0300 | [diff] [blame] | 1495 | simple_transaction_set(file, 2); |
Jarkko Sakkinen | 828716c | 2011-09-08 10:12:01 +0300 | [diff] [blame] | 1496 | return SMK_LOADLEN; |
| 1497 | } |
| 1498 | |
| 1499 | static const struct file_operations smk_access_ops = { |
| 1500 | .write = smk_write_access, |
| 1501 | .read = simple_transaction_read, |
| 1502 | .release = simple_transaction_release, |
| 1503 | .llseek = generic_file_llseek, |
| 1504 | }; |
| 1505 | |
Etienne Basset | ecfcc53 | 2009-04-08 20:40:06 +0200 | [diff] [blame] | 1506 | /** |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 1507 | * smk_fill_super - fill the /smackfs superblock |
| 1508 | * @sb: the empty superblock |
| 1509 | * @data: unused |
| 1510 | * @silent: unused |
| 1511 | * |
| 1512 | * Fill in the well known entries for /smack |
| 1513 | * |
| 1514 | * Returns 0 on success, an error code on failure |
| 1515 | */ |
| 1516 | static int smk_fill_super(struct super_block *sb, void *data, int silent) |
| 1517 | { |
| 1518 | int rc; |
| 1519 | struct inode *root_inode; |
| 1520 | |
| 1521 | static struct tree_descr smack_files[] = { |
Casey Schaufler | 7898e1f | 2011-01-17 08:05:27 -0800 | [diff] [blame] | 1522 | [SMK_LOAD] = { |
| 1523 | "load", &smk_load_ops, S_IRUGO|S_IWUSR}, |
| 1524 | [SMK_CIPSO] = { |
| 1525 | "cipso", &smk_cipso_ops, S_IRUGO|S_IWUSR}, |
| 1526 | [SMK_DOI] = { |
| 1527 | "doi", &smk_doi_ops, S_IRUGO|S_IWUSR}, |
| 1528 | [SMK_DIRECT] = { |
| 1529 | "direct", &smk_direct_ops, S_IRUGO|S_IWUSR}, |
| 1530 | [SMK_AMBIENT] = { |
| 1531 | "ambient", &smk_ambient_ops, S_IRUGO|S_IWUSR}, |
| 1532 | [SMK_NETLBLADDR] = { |
| 1533 | "netlabel", &smk_netlbladdr_ops, S_IRUGO|S_IWUSR}, |
| 1534 | [SMK_ONLYCAP] = { |
| 1535 | "onlycap", &smk_onlycap_ops, S_IRUGO|S_IWUSR}, |
| 1536 | [SMK_LOGGING] = { |
| 1537 | "logging", &smk_logging_ops, S_IRUGO|S_IWUSR}, |
| 1538 | [SMK_LOAD_SELF] = { |
| 1539 | "load-self", &smk_load_self_ops, S_IRUGO|S_IWUGO}, |
Jarkko Sakkinen | 828716c | 2011-09-08 10:12:01 +0300 | [diff] [blame] | 1540 | [SMK_ACCESSES] = { |
Jarkko Sakkinen | 0e94ae1 | 2011-10-18 21:21:36 +0300 | [diff] [blame] | 1541 | "access", &smk_access_ops, S_IRUGO|S_IWUGO}, |
Casey Schaufler | 7898e1f | 2011-01-17 08:05:27 -0800 | [diff] [blame] | 1542 | /* last one */ |
| 1543 | {""} |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 1544 | }; |
| 1545 | |
| 1546 | rc = simple_fill_super(sb, SMACK_MAGIC, smack_files); |
| 1547 | if (rc != 0) { |
| 1548 | printk(KERN_ERR "%s failed %d while creating inodes\n", |
| 1549 | __func__, rc); |
| 1550 | return rc; |
| 1551 | } |
| 1552 | |
| 1553 | root_inode = sb->s_root->d_inode; |
| 1554 | root_inode->i_security = new_inode_smack(smack_known_floor.smk_known); |
| 1555 | |
| 1556 | return 0; |
| 1557 | } |
| 1558 | |
| 1559 | /** |
Al Viro | fc14f2f | 2010-07-25 01:48:30 +0400 | [diff] [blame] | 1560 | * smk_mount - get the smackfs superblock |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 1561 | * @fs_type: passed along without comment |
| 1562 | * @flags: passed along without comment |
| 1563 | * @dev_name: passed along without comment |
| 1564 | * @data: passed along without comment |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 1565 | * |
| 1566 | * Just passes everything along. |
| 1567 | * |
| 1568 | * Returns what the lower level code does. |
| 1569 | */ |
Al Viro | fc14f2f | 2010-07-25 01:48:30 +0400 | [diff] [blame] | 1570 | static struct dentry *smk_mount(struct file_system_type *fs_type, |
| 1571 | int flags, const char *dev_name, void *data) |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 1572 | { |
Al Viro | fc14f2f | 2010-07-25 01:48:30 +0400 | [diff] [blame] | 1573 | return mount_single(fs_type, flags, data, smk_fill_super); |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 1574 | } |
| 1575 | |
| 1576 | static struct file_system_type smk_fs_type = { |
| 1577 | .name = "smackfs", |
Al Viro | fc14f2f | 2010-07-25 01:48:30 +0400 | [diff] [blame] | 1578 | .mount = smk_mount, |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 1579 | .kill_sb = kill_litter_super, |
| 1580 | }; |
| 1581 | |
| 1582 | static struct vfsmount *smackfs_mount; |
| 1583 | |
| 1584 | /** |
| 1585 | * init_smk_fs - get the smackfs superblock |
| 1586 | * |
| 1587 | * register the smackfs |
| 1588 | * |
Ahmed S. Darwish | 076c54c | 2008-03-06 18:09:10 +0200 | [diff] [blame] | 1589 | * Do not register smackfs if Smack wasn't enabled |
| 1590 | * on boot. We can not put this method normally under the |
| 1591 | * smack_init() code path since the security subsystem get |
| 1592 | * initialized before the vfs caches. |
| 1593 | * |
| 1594 | * Returns true if we were not chosen on boot or if |
| 1595 | * we were chosen and filesystem registration succeeded. |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 1596 | */ |
| 1597 | static int __init init_smk_fs(void) |
| 1598 | { |
| 1599 | int err; |
| 1600 | |
Ahmed S. Darwish | 076c54c | 2008-03-06 18:09:10 +0200 | [diff] [blame] | 1601 | if (!security_module_enable(&smack_ops)) |
| 1602 | return 0; |
| 1603 | |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 1604 | err = register_filesystem(&smk_fs_type); |
| 1605 | if (!err) { |
| 1606 | smackfs_mount = kern_mount(&smk_fs_type); |
| 1607 | if (IS_ERR(smackfs_mount)) { |
| 1608 | printk(KERN_ERR "smackfs: could not mount!\n"); |
| 1609 | err = PTR_ERR(smackfs_mount); |
| 1610 | smackfs_mount = NULL; |
| 1611 | } |
| 1612 | } |
| 1613 | |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 1614 | smk_cipso_doi(); |
Casey Schaufler | 4bc87e6 | 2008-02-15 15:24:25 -0800 | [diff] [blame] | 1615 | smk_unlbl_ambient(NULL); |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 1616 | |
Casey Schaufler | 272cd7a | 2011-09-20 12:24:36 -0700 | [diff] [blame] | 1617 | mutex_init(&smack_known_floor.smk_rules_lock); |
| 1618 | mutex_init(&smack_known_hat.smk_rules_lock); |
| 1619 | mutex_init(&smack_known_huh.smk_rules_lock); |
| 1620 | mutex_init(&smack_known_invalid.smk_rules_lock); |
| 1621 | mutex_init(&smack_known_star.smk_rules_lock); |
| 1622 | mutex_init(&smack_known_web.smk_rules_lock); |
| 1623 | |
| 1624 | INIT_LIST_HEAD(&smack_known_floor.smk_rules); |
| 1625 | INIT_LIST_HEAD(&smack_known_hat.smk_rules); |
| 1626 | INIT_LIST_HEAD(&smack_known_huh.smk_rules); |
| 1627 | INIT_LIST_HEAD(&smack_known_invalid.smk_rules); |
| 1628 | INIT_LIST_HEAD(&smack_known_star.smk_rules); |
| 1629 | INIT_LIST_HEAD(&smack_known_web.smk_rules); |
| 1630 | |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 1631 | return err; |
| 1632 | } |
| 1633 | |
| 1634 | __initcall(init_smk_fs); |