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> |
| 23 | #include <net/netlabel.h> |
| 24 | #include <net/cipso_ipv4.h> |
| 25 | #include <linux/seq_file.h> |
| 26 | #include <linux/ctype.h> |
Casey Schaufler | 4bc87e6 | 2008-02-15 15:24:25 -0800 | [diff] [blame] | 27 | #include <linux/audit.h> |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 28 | #include "smack.h" |
| 29 | |
| 30 | /* |
| 31 | * smackfs pseudo filesystem. |
| 32 | */ |
| 33 | |
| 34 | enum smk_inos { |
| 35 | SMK_ROOT_INO = 2, |
| 36 | SMK_LOAD = 3, /* load policy */ |
| 37 | SMK_CIPSO = 4, /* load label -> CIPSO mapping */ |
| 38 | SMK_DOI = 5, /* CIPSO DOI */ |
| 39 | SMK_DIRECT = 6, /* CIPSO level indicating direct label */ |
| 40 | SMK_AMBIENT = 7, /* internet ambient label */ |
| 41 | SMK_NLTYPE = 8, /* label scheme to use by default */ |
Casey Schaufler | 1544623 | 2008-07-30 15:37:11 -0700 | [diff] [blame] | 42 | SMK_ONLYCAP = 9, /* the only "capable" label */ |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 43 | }; |
| 44 | |
| 45 | /* |
| 46 | * List locks |
| 47 | */ |
| 48 | static DEFINE_MUTEX(smack_list_lock); |
| 49 | static DEFINE_MUTEX(smack_cipso_lock); |
Casey Schaufler | 4bc87e6 | 2008-02-15 15:24:25 -0800 | [diff] [blame] | 50 | static DEFINE_MUTEX(smack_ambient_lock); |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 51 | |
| 52 | /* |
| 53 | * This is the "ambient" label for network traffic. |
| 54 | * If it isn't somehow marked, use this. |
| 55 | * It can be reset via smackfs/ambient |
| 56 | */ |
| 57 | char *smack_net_ambient = smack_known_floor.smk_known; |
| 58 | |
| 59 | /* |
| 60 | * This is the default packet marking scheme for network traffic. |
| 61 | * It can be reset via smackfs/nltype |
| 62 | */ |
| 63 | int smack_net_nltype = NETLBL_NLTYPE_CIPSOV4; |
| 64 | |
| 65 | /* |
| 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 | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 82 | static int smk_cipso_doi_value = SMACK_CIPSO_DOI_DEFAULT; |
| 83 | struct smk_list_entry *smack_list; |
| 84 | |
| 85 | #define SEQ_READ_FINISHED 1 |
| 86 | |
| 87 | /* |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 88 | * Values for parsing cipso rules |
| 89 | * SMK_DIGITLEN: Length of a digit field in a rule. |
Ahmed S. Darwish | b500ce8 | 2008-03-13 12:32:34 -0700 | [diff] [blame] | 90 | * SMK_CIPSOMIN: Minimum possible cipso rule length. |
| 91 | * SMK_CIPSOMAX: Maximum possible cipso rule length. |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 92 | */ |
| 93 | #define SMK_DIGITLEN 4 |
Ahmed S. Darwish | b500ce8 | 2008-03-13 12:32:34 -0700 | [diff] [blame] | 94 | #define SMK_CIPSOMIN (SMK_LABELLEN + 2 * SMK_DIGITLEN) |
| 95 | #define SMK_CIPSOMAX (SMK_CIPSOMIN + SMACK_CIPSO_MAXCATNUM * SMK_DIGITLEN) |
| 96 | |
| 97 | /* |
| 98 | * Values for parsing MAC rules |
| 99 | * SMK_ACCESS: Maximum possible combination of access permissions |
| 100 | * SMK_ACCESSLEN: Maximum length for a rule access field |
| 101 | * SMK_LOADLEN: Smack rule length |
| 102 | */ |
| 103 | #define SMK_ACCESS "rwxa" |
| 104 | #define SMK_ACCESSLEN (sizeof(SMK_ACCESS) - 1) |
| 105 | #define SMK_LOADLEN (SMK_LABELLEN + SMK_LABELLEN + SMK_ACCESSLEN) |
| 106 | |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 107 | |
| 108 | /* |
| 109 | * Seq_file read operations for /smack/load |
| 110 | */ |
| 111 | |
| 112 | static void *load_seq_start(struct seq_file *s, loff_t *pos) |
| 113 | { |
| 114 | if (*pos == SEQ_READ_FINISHED) |
| 115 | return NULL; |
| 116 | |
| 117 | return smack_list; |
| 118 | } |
| 119 | |
| 120 | static void *load_seq_next(struct seq_file *s, void *v, loff_t *pos) |
| 121 | { |
| 122 | struct smk_list_entry *skp = ((struct smk_list_entry *) v)->smk_next; |
| 123 | |
| 124 | if (skp == NULL) |
| 125 | *pos = SEQ_READ_FINISHED; |
| 126 | |
| 127 | return skp; |
| 128 | } |
| 129 | |
| 130 | static int load_seq_show(struct seq_file *s, void *v) |
| 131 | { |
| 132 | struct smk_list_entry *slp = (struct smk_list_entry *) v; |
| 133 | struct smack_rule *srp = &slp->smk_rule; |
| 134 | |
| 135 | seq_printf(s, "%s %s", (char *)srp->smk_subject, |
| 136 | (char *)srp->smk_object); |
| 137 | |
| 138 | seq_putc(s, ' '); |
| 139 | |
| 140 | if (srp->smk_access & MAY_READ) |
| 141 | seq_putc(s, 'r'); |
| 142 | if (srp->smk_access & MAY_WRITE) |
| 143 | seq_putc(s, 'w'); |
| 144 | if (srp->smk_access & MAY_EXEC) |
| 145 | seq_putc(s, 'x'); |
| 146 | if (srp->smk_access & MAY_APPEND) |
| 147 | seq_putc(s, 'a'); |
| 148 | if (srp->smk_access == 0) |
| 149 | seq_putc(s, '-'); |
| 150 | |
| 151 | seq_putc(s, '\n'); |
| 152 | |
| 153 | return 0; |
| 154 | } |
| 155 | |
| 156 | static void load_seq_stop(struct seq_file *s, void *v) |
| 157 | { |
| 158 | /* No-op */ |
| 159 | } |
| 160 | |
| 161 | static struct seq_operations load_seq_ops = { |
| 162 | .start = load_seq_start, |
| 163 | .next = load_seq_next, |
| 164 | .show = load_seq_show, |
| 165 | .stop = load_seq_stop, |
| 166 | }; |
| 167 | |
| 168 | /** |
| 169 | * smk_open_load - open() for /smack/load |
| 170 | * @inode: inode structure representing file |
| 171 | * @file: "load" file pointer |
| 172 | * |
| 173 | * For reading, use load_seq_* seq_file reading operations. |
| 174 | */ |
| 175 | static int smk_open_load(struct inode *inode, struct file *file) |
| 176 | { |
Ahmed S. Darwish | cb622bb | 2008-03-24 12:29:49 -0700 | [diff] [blame] | 177 | return seq_open(file, &load_seq_ops); |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 178 | } |
| 179 | |
| 180 | /** |
| 181 | * smk_set_access - add a rule to the rule list |
| 182 | * @srp: the new rule to add |
| 183 | * |
| 184 | * Looks through the current subject/object/access list for |
| 185 | * the subject/object pair and replaces the access that was |
| 186 | * there. If the pair isn't found add it with the specified |
| 187 | * access. |
Sergio Luis | 81ea714 | 2008-12-22 01:16:15 -0300 | [diff] [blame^] | 188 | * |
| 189 | * Returns 0 if nothing goes wrong or -ENOMEM if it fails |
| 190 | * during the allocation of the new pair to add. |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 191 | */ |
Sergio Luis | 81ea714 | 2008-12-22 01:16:15 -0300 | [diff] [blame^] | 192 | static int smk_set_access(struct smack_rule *srp) |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 193 | { |
| 194 | struct smk_list_entry *sp; |
| 195 | struct smk_list_entry *newp; |
Sergio Luis | 81ea714 | 2008-12-22 01:16:15 -0300 | [diff] [blame^] | 196 | int ret = 0; |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 197 | |
| 198 | mutex_lock(&smack_list_lock); |
| 199 | |
| 200 | for (sp = smack_list; sp != NULL; sp = sp->smk_next) |
| 201 | if (sp->smk_rule.smk_subject == srp->smk_subject && |
| 202 | sp->smk_rule.smk_object == srp->smk_object) { |
| 203 | sp->smk_rule.smk_access = srp->smk_access; |
| 204 | break; |
| 205 | } |
| 206 | |
| 207 | if (sp == NULL) { |
| 208 | newp = kzalloc(sizeof(struct smk_list_entry), GFP_KERNEL); |
Sergio Luis | 81ea714 | 2008-12-22 01:16:15 -0300 | [diff] [blame^] | 209 | if (newp == NULL) { |
| 210 | ret = -ENOMEM; |
| 211 | goto out; |
| 212 | } |
| 213 | |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 214 | newp->smk_rule = *srp; |
| 215 | newp->smk_next = smack_list; |
| 216 | smack_list = newp; |
| 217 | } |
| 218 | |
Sergio Luis | 81ea714 | 2008-12-22 01:16:15 -0300 | [diff] [blame^] | 219 | out: |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 220 | mutex_unlock(&smack_list_lock); |
| 221 | |
Sergio Luis | 81ea714 | 2008-12-22 01:16:15 -0300 | [diff] [blame^] | 222 | return ret; |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 223 | } |
| 224 | |
| 225 | /** |
| 226 | * smk_write_load - write() for /smack/load |
| 227 | * @filp: file pointer, not actually used |
| 228 | * @buf: where to get the data from |
| 229 | * @count: bytes sent |
| 230 | * @ppos: where to start - must be 0 |
| 231 | * |
| 232 | * Get one smack access rule from above. |
| 233 | * The format is exactly: |
| 234 | * char subject[SMK_LABELLEN] |
| 235 | * char object[SMK_LABELLEN] |
Ahmed S. Darwish | b500ce8 | 2008-03-13 12:32:34 -0700 | [diff] [blame] | 236 | * char access[SMK_ACCESSLEN] |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 237 | * |
Ahmed S. Darwish | b500ce8 | 2008-03-13 12:32:34 -0700 | [diff] [blame] | 238 | * writes must be SMK_LABELLEN+SMK_LABELLEN+SMK_ACCESSLEN bytes. |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 239 | */ |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 240 | static ssize_t smk_write_load(struct file *file, const char __user *buf, |
| 241 | size_t count, loff_t *ppos) |
| 242 | { |
| 243 | struct smack_rule rule; |
| 244 | char *data; |
| 245 | int rc = -EINVAL; |
| 246 | |
| 247 | /* |
| 248 | * Must have privilege. |
| 249 | * No partial writes. |
| 250 | * Enough data must be present. |
| 251 | */ |
| 252 | if (!capable(CAP_MAC_ADMIN)) |
| 253 | return -EPERM; |
| 254 | if (*ppos != 0) |
| 255 | return -EINVAL; |
Ahmed S. Darwish | b500ce8 | 2008-03-13 12:32:34 -0700 | [diff] [blame] | 256 | if (count != SMK_LOADLEN) |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 257 | return -EINVAL; |
| 258 | |
| 259 | data = kzalloc(count, GFP_KERNEL); |
| 260 | if (data == NULL) |
| 261 | return -ENOMEM; |
| 262 | |
| 263 | if (copy_from_user(data, buf, count) != 0) { |
| 264 | rc = -EFAULT; |
| 265 | goto out; |
| 266 | } |
| 267 | |
| 268 | rule.smk_subject = smk_import(data, 0); |
| 269 | if (rule.smk_subject == NULL) |
| 270 | goto out; |
| 271 | |
| 272 | rule.smk_object = smk_import(data + SMK_LABELLEN, 0); |
| 273 | if (rule.smk_object == NULL) |
| 274 | goto out; |
| 275 | |
| 276 | rule.smk_access = 0; |
| 277 | |
| 278 | switch (data[SMK_LABELLEN + SMK_LABELLEN]) { |
| 279 | case '-': |
| 280 | break; |
| 281 | case 'r': |
| 282 | case 'R': |
| 283 | rule.smk_access |= MAY_READ; |
| 284 | break; |
| 285 | default: |
| 286 | goto out; |
| 287 | } |
| 288 | |
| 289 | switch (data[SMK_LABELLEN + SMK_LABELLEN + 1]) { |
| 290 | case '-': |
| 291 | break; |
| 292 | case 'w': |
| 293 | case 'W': |
| 294 | rule.smk_access |= MAY_WRITE; |
| 295 | break; |
| 296 | default: |
| 297 | goto out; |
| 298 | } |
| 299 | |
| 300 | switch (data[SMK_LABELLEN + SMK_LABELLEN + 2]) { |
| 301 | case '-': |
| 302 | break; |
| 303 | case 'x': |
| 304 | case 'X': |
| 305 | rule.smk_access |= MAY_EXEC; |
| 306 | break; |
| 307 | default: |
| 308 | goto out; |
| 309 | } |
| 310 | |
| 311 | switch (data[SMK_LABELLEN + SMK_LABELLEN + 3]) { |
| 312 | case '-': |
| 313 | break; |
| 314 | case 'a': |
| 315 | case 'A': |
| 316 | rule.smk_access |= MAY_READ; |
| 317 | break; |
| 318 | default: |
| 319 | goto out; |
| 320 | } |
| 321 | |
Sergio Luis | 81ea714 | 2008-12-22 01:16:15 -0300 | [diff] [blame^] | 322 | rc = smk_set_access(&rule); |
| 323 | |
| 324 | if (!rc) |
| 325 | rc = count; |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 326 | |
| 327 | out: |
| 328 | kfree(data); |
| 329 | return rc; |
| 330 | } |
| 331 | |
| 332 | static const struct file_operations smk_load_ops = { |
| 333 | .open = smk_open_load, |
| 334 | .read = seq_read, |
| 335 | .llseek = seq_lseek, |
| 336 | .write = smk_write_load, |
Ahmed S. Darwish | cb622bb | 2008-03-24 12:29:49 -0700 | [diff] [blame] | 337 | .release = seq_release, |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 338 | }; |
| 339 | |
| 340 | /** |
| 341 | * smk_cipso_doi - initialize the CIPSO domain |
| 342 | */ |
Casey Schaufler | 30aa4fa | 2008-04-28 02:13:43 -0700 | [diff] [blame] | 343 | static void smk_cipso_doi(void) |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 344 | { |
| 345 | int rc; |
| 346 | struct cipso_v4_doi *doip; |
| 347 | struct netlbl_audit audit_info; |
| 348 | |
Casey Schaufler | 4bc87e6 | 2008-02-15 15:24:25 -0800 | [diff] [blame] | 349 | audit_info.loginuid = audit_get_loginuid(current); |
Eric Paris | 2532386 | 2008-04-18 10:09:25 -0400 | [diff] [blame] | 350 | audit_info.sessionid = audit_get_sessionid(current); |
David Howells | 86a264a | 2008-11-14 10:39:18 +1100 | [diff] [blame] | 351 | audit_info.secid = smack_to_secid(current_security()); |
Casey Schaufler | 4bc87e6 | 2008-02-15 15:24:25 -0800 | [diff] [blame] | 352 | |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 353 | rc = netlbl_cfg_map_del(NULL, &audit_info); |
| 354 | if (rc != 0) |
| 355 | printk(KERN_WARNING "%s:%d remove rc = %d\n", |
| 356 | __func__, __LINE__, rc); |
| 357 | |
| 358 | doip = kmalloc(sizeof(struct cipso_v4_doi), GFP_KERNEL); |
| 359 | if (doip == NULL) |
| 360 | panic("smack: Failed to initialize cipso DOI.\n"); |
| 361 | doip->map.std = NULL; |
| 362 | doip->doi = smk_cipso_doi_value; |
| 363 | doip->type = CIPSO_V4_MAP_PASS; |
| 364 | doip->tags[0] = CIPSO_V4_TAG_RBITMAP; |
| 365 | for (rc = 1; rc < CIPSO_V4_TAG_MAXCNT; rc++) |
| 366 | doip->tags[rc] = CIPSO_V4_TAG_INVALID; |
| 367 | |
| 368 | rc = netlbl_cfg_cipsov4_add_map(doip, NULL, &audit_info); |
Paul Moore | b1edeb1 | 2008-10-10 10:16:31 -0400 | [diff] [blame] | 369 | if (rc != 0) { |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 370 | printk(KERN_WARNING "%s:%d add rc = %d\n", |
| 371 | __func__, __LINE__, rc); |
Paul Moore | b1edeb1 | 2008-10-10 10:16:31 -0400 | [diff] [blame] | 372 | kfree(doip); |
| 373 | } |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 374 | } |
| 375 | |
Casey Schaufler | 4bc87e6 | 2008-02-15 15:24:25 -0800 | [diff] [blame] | 376 | /** |
| 377 | * smk_unlbl_ambient - initialize the unlabeled domain |
| 378 | */ |
Casey Schaufler | 30aa4fa | 2008-04-28 02:13:43 -0700 | [diff] [blame] | 379 | static void smk_unlbl_ambient(char *oldambient) |
Casey Schaufler | 4bc87e6 | 2008-02-15 15:24:25 -0800 | [diff] [blame] | 380 | { |
| 381 | int rc; |
| 382 | struct netlbl_audit audit_info; |
| 383 | |
| 384 | audit_info.loginuid = audit_get_loginuid(current); |
Eric Paris | 2532386 | 2008-04-18 10:09:25 -0400 | [diff] [blame] | 385 | audit_info.sessionid = audit_get_sessionid(current); |
David Howells | 86a264a | 2008-11-14 10:39:18 +1100 | [diff] [blame] | 386 | audit_info.secid = smack_to_secid(current_security()); |
Casey Schaufler | 4bc87e6 | 2008-02-15 15:24:25 -0800 | [diff] [blame] | 387 | |
| 388 | if (oldambient != NULL) { |
| 389 | rc = netlbl_cfg_map_del(oldambient, &audit_info); |
| 390 | if (rc != 0) |
| 391 | printk(KERN_WARNING "%s:%d remove rc = %d\n", |
| 392 | __func__, __LINE__, rc); |
| 393 | } |
| 394 | |
| 395 | rc = netlbl_cfg_unlbl_add_map(smack_net_ambient, &audit_info); |
| 396 | if (rc != 0) |
| 397 | printk(KERN_WARNING "%s:%d add rc = %d\n", |
| 398 | __func__, __LINE__, rc); |
| 399 | } |
| 400 | |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 401 | /* |
| 402 | * Seq_file read operations for /smack/cipso |
| 403 | */ |
| 404 | |
| 405 | static void *cipso_seq_start(struct seq_file *s, loff_t *pos) |
| 406 | { |
| 407 | if (*pos == SEQ_READ_FINISHED) |
| 408 | return NULL; |
| 409 | |
| 410 | return smack_known; |
| 411 | } |
| 412 | |
| 413 | static void *cipso_seq_next(struct seq_file *s, void *v, loff_t *pos) |
| 414 | { |
| 415 | struct smack_known *skp = ((struct smack_known *) v)->smk_next; |
| 416 | |
| 417 | /* |
| 418 | * Omit labels with no associated cipso value |
| 419 | */ |
| 420 | while (skp != NULL && !skp->smk_cipso) |
| 421 | skp = skp->smk_next; |
| 422 | |
| 423 | if (skp == NULL) |
| 424 | *pos = SEQ_READ_FINISHED; |
| 425 | |
| 426 | return skp; |
| 427 | } |
| 428 | |
| 429 | /* |
| 430 | * Print cipso labels in format: |
| 431 | * label level[/cat[,cat]] |
| 432 | */ |
| 433 | static int cipso_seq_show(struct seq_file *s, void *v) |
| 434 | { |
| 435 | struct smack_known *skp = (struct smack_known *) v; |
| 436 | struct smack_cipso *scp = skp->smk_cipso; |
| 437 | char *cbp; |
| 438 | char sep = '/'; |
| 439 | int cat = 1; |
| 440 | int i; |
| 441 | unsigned char m; |
| 442 | |
| 443 | if (scp == NULL) |
| 444 | return 0; |
| 445 | |
| 446 | seq_printf(s, "%s %3d", (char *)&skp->smk_known, scp->smk_level); |
| 447 | |
| 448 | cbp = scp->smk_catset; |
| 449 | for (i = 0; i < SMK_LABELLEN; i++) |
| 450 | for (m = 0x80; m != 0; m >>= 1) { |
| 451 | if (m & cbp[i]) { |
| 452 | seq_printf(s, "%c%d", sep, cat); |
| 453 | sep = ','; |
| 454 | } |
| 455 | cat++; |
| 456 | } |
| 457 | |
| 458 | seq_putc(s, '\n'); |
| 459 | |
| 460 | return 0; |
| 461 | } |
| 462 | |
| 463 | static void cipso_seq_stop(struct seq_file *s, void *v) |
| 464 | { |
| 465 | /* No-op */ |
| 466 | } |
| 467 | |
| 468 | static struct seq_operations cipso_seq_ops = { |
| 469 | .start = cipso_seq_start, |
| 470 | .stop = cipso_seq_stop, |
| 471 | .next = cipso_seq_next, |
| 472 | .show = cipso_seq_show, |
| 473 | }; |
| 474 | |
| 475 | /** |
| 476 | * smk_open_cipso - open() for /smack/cipso |
| 477 | * @inode: inode structure representing file |
| 478 | * @file: "cipso" file pointer |
| 479 | * |
| 480 | * Connect our cipso_seq_* operations with /smack/cipso |
| 481 | * file_operations |
| 482 | */ |
| 483 | static int smk_open_cipso(struct inode *inode, struct file *file) |
| 484 | { |
| 485 | return seq_open(file, &cipso_seq_ops); |
| 486 | } |
| 487 | |
| 488 | /** |
| 489 | * smk_write_cipso - write() for /smack/cipso |
| 490 | * @filp: file pointer, not actually used |
| 491 | * @buf: where to get the data from |
| 492 | * @count: bytes sent |
| 493 | * @ppos: where to start |
| 494 | * |
| 495 | * Accepts only one cipso rule per write call. |
| 496 | * Returns number of bytes written or error code, as appropriate |
| 497 | */ |
| 498 | static ssize_t smk_write_cipso(struct file *file, const char __user *buf, |
| 499 | size_t count, loff_t *ppos) |
| 500 | { |
| 501 | struct smack_known *skp; |
| 502 | struct smack_cipso *scp = NULL; |
| 503 | char mapcatset[SMK_LABELLEN]; |
| 504 | int maplevel; |
| 505 | int cat; |
| 506 | int catlen; |
| 507 | ssize_t rc = -EINVAL; |
| 508 | char *data = NULL; |
| 509 | char *rule; |
| 510 | int ret; |
| 511 | int i; |
| 512 | |
| 513 | /* |
| 514 | * Must have privilege. |
| 515 | * No partial writes. |
| 516 | * Enough data must be present. |
| 517 | */ |
| 518 | if (!capable(CAP_MAC_ADMIN)) |
| 519 | return -EPERM; |
| 520 | if (*ppos != 0) |
| 521 | return -EINVAL; |
Ahmed S. Darwish | b500ce8 | 2008-03-13 12:32:34 -0700 | [diff] [blame] | 522 | if (count < SMK_CIPSOMIN || count > SMK_CIPSOMAX) |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 523 | return -EINVAL; |
| 524 | |
| 525 | data = kzalloc(count + 1, GFP_KERNEL); |
| 526 | if (data == NULL) |
| 527 | return -ENOMEM; |
| 528 | |
| 529 | if (copy_from_user(data, buf, count) != 0) { |
| 530 | rc = -EFAULT; |
| 531 | goto unlockedout; |
| 532 | } |
| 533 | |
| 534 | data[count] = '\0'; |
| 535 | rule = data; |
| 536 | /* |
| 537 | * Only allow one writer at a time. Writes should be |
| 538 | * quite rare and small in any case. |
| 539 | */ |
| 540 | mutex_lock(&smack_cipso_lock); |
| 541 | |
| 542 | skp = smk_import_entry(rule, 0); |
| 543 | if (skp == NULL) |
| 544 | goto out; |
| 545 | |
| 546 | rule += SMK_LABELLEN;; |
| 547 | ret = sscanf(rule, "%d", &maplevel); |
| 548 | if (ret != 1 || maplevel > SMACK_CIPSO_MAXLEVEL) |
| 549 | goto out; |
| 550 | |
| 551 | rule += SMK_DIGITLEN; |
| 552 | ret = sscanf(rule, "%d", &catlen); |
| 553 | if (ret != 1 || catlen > SMACK_CIPSO_MAXCATNUM) |
| 554 | goto out; |
| 555 | |
Ahmed S. Darwish | b500ce8 | 2008-03-13 12:32:34 -0700 | [diff] [blame] | 556 | if (count != (SMK_CIPSOMIN + catlen * SMK_DIGITLEN)) |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 557 | goto out; |
| 558 | |
| 559 | memset(mapcatset, 0, sizeof(mapcatset)); |
| 560 | |
| 561 | for (i = 0; i < catlen; i++) { |
| 562 | rule += SMK_DIGITLEN; |
| 563 | ret = sscanf(rule, "%d", &cat); |
| 564 | if (ret != 1 || cat > SMACK_CIPSO_MAXCATVAL) |
| 565 | goto out; |
| 566 | |
| 567 | smack_catset_bit(cat, mapcatset); |
| 568 | } |
| 569 | |
| 570 | if (skp->smk_cipso == NULL) { |
| 571 | scp = kzalloc(sizeof(struct smack_cipso), GFP_KERNEL); |
| 572 | if (scp == NULL) { |
| 573 | rc = -ENOMEM; |
| 574 | goto out; |
| 575 | } |
| 576 | } |
| 577 | |
| 578 | spin_lock_bh(&skp->smk_cipsolock); |
| 579 | |
| 580 | if (scp == NULL) |
| 581 | scp = skp->smk_cipso; |
| 582 | else |
| 583 | skp->smk_cipso = scp; |
| 584 | |
| 585 | scp->smk_level = maplevel; |
| 586 | memcpy(scp->smk_catset, mapcatset, sizeof(mapcatset)); |
| 587 | |
| 588 | spin_unlock_bh(&skp->smk_cipsolock); |
| 589 | |
| 590 | rc = count; |
| 591 | out: |
| 592 | mutex_unlock(&smack_cipso_lock); |
| 593 | unlockedout: |
| 594 | kfree(data); |
| 595 | return rc; |
| 596 | } |
| 597 | |
| 598 | static const struct file_operations smk_cipso_ops = { |
| 599 | .open = smk_open_cipso, |
| 600 | .read = seq_read, |
| 601 | .llseek = seq_lseek, |
| 602 | .write = smk_write_cipso, |
| 603 | .release = seq_release, |
| 604 | }; |
| 605 | |
| 606 | /** |
| 607 | * smk_read_doi - read() for /smack/doi |
| 608 | * @filp: file pointer, not actually used |
| 609 | * @buf: where to put the result |
| 610 | * @count: maximum to send along |
| 611 | * @ppos: where to start |
| 612 | * |
| 613 | * Returns number of bytes read or error code, as appropriate |
| 614 | */ |
| 615 | static ssize_t smk_read_doi(struct file *filp, char __user *buf, |
| 616 | size_t count, loff_t *ppos) |
| 617 | { |
| 618 | char temp[80]; |
| 619 | ssize_t rc; |
| 620 | |
| 621 | if (*ppos != 0) |
| 622 | return 0; |
| 623 | |
| 624 | sprintf(temp, "%d", smk_cipso_doi_value); |
| 625 | rc = simple_read_from_buffer(buf, count, ppos, temp, strlen(temp)); |
| 626 | |
| 627 | return rc; |
| 628 | } |
| 629 | |
| 630 | /** |
| 631 | * smk_write_doi - write() for /smack/doi |
| 632 | * @filp: file pointer, not actually used |
| 633 | * @buf: where to get the data from |
| 634 | * @count: bytes sent |
| 635 | * @ppos: where to start |
| 636 | * |
| 637 | * Returns number of bytes written or error code, as appropriate |
| 638 | */ |
| 639 | static ssize_t smk_write_doi(struct file *file, const char __user *buf, |
| 640 | size_t count, loff_t *ppos) |
| 641 | { |
| 642 | char temp[80]; |
| 643 | int i; |
| 644 | |
| 645 | if (!capable(CAP_MAC_ADMIN)) |
| 646 | return -EPERM; |
| 647 | |
| 648 | if (count >= sizeof(temp) || count == 0) |
| 649 | return -EINVAL; |
| 650 | |
| 651 | if (copy_from_user(temp, buf, count) != 0) |
| 652 | return -EFAULT; |
| 653 | |
| 654 | temp[count] = '\0'; |
| 655 | |
| 656 | if (sscanf(temp, "%d", &i) != 1) |
| 657 | return -EINVAL; |
| 658 | |
| 659 | smk_cipso_doi_value = i; |
| 660 | |
| 661 | smk_cipso_doi(); |
| 662 | |
| 663 | return count; |
| 664 | } |
| 665 | |
| 666 | static const struct file_operations smk_doi_ops = { |
| 667 | .read = smk_read_doi, |
| 668 | .write = smk_write_doi, |
| 669 | }; |
| 670 | |
| 671 | /** |
| 672 | * smk_read_direct - read() for /smack/direct |
| 673 | * @filp: file pointer, not actually used |
| 674 | * @buf: where to put the result |
| 675 | * @count: maximum to send along |
| 676 | * @ppos: where to start |
| 677 | * |
| 678 | * Returns number of bytes read or error code, as appropriate |
| 679 | */ |
| 680 | static ssize_t smk_read_direct(struct file *filp, char __user *buf, |
| 681 | size_t count, loff_t *ppos) |
| 682 | { |
| 683 | char temp[80]; |
| 684 | ssize_t rc; |
| 685 | |
| 686 | if (*ppos != 0) |
| 687 | return 0; |
| 688 | |
| 689 | sprintf(temp, "%d", smack_cipso_direct); |
| 690 | rc = simple_read_from_buffer(buf, count, ppos, temp, strlen(temp)); |
| 691 | |
| 692 | return rc; |
| 693 | } |
| 694 | |
| 695 | /** |
| 696 | * smk_write_direct - write() for /smack/direct |
| 697 | * @filp: file pointer, not actually used |
| 698 | * @buf: where to get the data from |
| 699 | * @count: bytes sent |
| 700 | * @ppos: where to start |
| 701 | * |
| 702 | * Returns number of bytes written or error code, as appropriate |
| 703 | */ |
| 704 | static ssize_t smk_write_direct(struct file *file, const char __user *buf, |
| 705 | size_t count, loff_t *ppos) |
| 706 | { |
| 707 | char temp[80]; |
| 708 | int i; |
| 709 | |
| 710 | if (!capable(CAP_MAC_ADMIN)) |
| 711 | return -EPERM; |
| 712 | |
| 713 | if (count >= sizeof(temp) || count == 0) |
| 714 | return -EINVAL; |
| 715 | |
| 716 | if (copy_from_user(temp, buf, count) != 0) |
| 717 | return -EFAULT; |
| 718 | |
| 719 | temp[count] = '\0'; |
| 720 | |
| 721 | if (sscanf(temp, "%d", &i) != 1) |
| 722 | return -EINVAL; |
| 723 | |
| 724 | smack_cipso_direct = i; |
| 725 | |
| 726 | return count; |
| 727 | } |
| 728 | |
| 729 | static const struct file_operations smk_direct_ops = { |
| 730 | .read = smk_read_direct, |
| 731 | .write = smk_write_direct, |
| 732 | }; |
| 733 | |
| 734 | /** |
| 735 | * smk_read_ambient - read() for /smack/ambient |
| 736 | * @filp: file pointer, not actually used |
| 737 | * @buf: where to put the result |
| 738 | * @cn: maximum to send along |
| 739 | * @ppos: where to start |
| 740 | * |
| 741 | * Returns number of bytes read or error code, as appropriate |
| 742 | */ |
| 743 | static ssize_t smk_read_ambient(struct file *filp, char __user *buf, |
| 744 | size_t cn, loff_t *ppos) |
| 745 | { |
| 746 | ssize_t rc; |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 747 | int asize; |
| 748 | |
| 749 | if (*ppos != 0) |
| 750 | return 0; |
| 751 | /* |
| 752 | * Being careful to avoid a problem in the case where |
| 753 | * smack_net_ambient gets changed in midstream. |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 754 | */ |
Casey Schaufler | 4bc87e6 | 2008-02-15 15:24:25 -0800 | [diff] [blame] | 755 | mutex_lock(&smack_ambient_lock); |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 756 | |
Casey Schaufler | 4bc87e6 | 2008-02-15 15:24:25 -0800 | [diff] [blame] | 757 | asize = strlen(smack_net_ambient) + 1; |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 758 | |
Casey Schaufler | 4bc87e6 | 2008-02-15 15:24:25 -0800 | [diff] [blame] | 759 | if (cn >= asize) |
| 760 | rc = simple_read_from_buffer(buf, cn, ppos, |
| 761 | smack_net_ambient, asize); |
| 762 | else |
| 763 | rc = -EINVAL; |
| 764 | |
| 765 | mutex_unlock(&smack_ambient_lock); |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 766 | |
| 767 | return rc; |
| 768 | } |
| 769 | |
| 770 | /** |
| 771 | * smk_write_ambient - write() for /smack/ambient |
| 772 | * @filp: file pointer, not actually used |
| 773 | * @buf: where to get the data from |
| 774 | * @count: bytes sent |
| 775 | * @ppos: where to start |
| 776 | * |
| 777 | * Returns number of bytes written or error code, as appropriate |
| 778 | */ |
| 779 | static ssize_t smk_write_ambient(struct file *file, const char __user *buf, |
| 780 | size_t count, loff_t *ppos) |
| 781 | { |
| 782 | char in[SMK_LABELLEN]; |
Casey Schaufler | 4bc87e6 | 2008-02-15 15:24:25 -0800 | [diff] [blame] | 783 | char *oldambient; |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 784 | char *smack; |
| 785 | |
| 786 | if (!capable(CAP_MAC_ADMIN)) |
| 787 | return -EPERM; |
| 788 | |
| 789 | if (count >= SMK_LABELLEN) |
| 790 | return -EINVAL; |
| 791 | |
| 792 | if (copy_from_user(in, buf, count) != 0) |
| 793 | return -EFAULT; |
| 794 | |
| 795 | smack = smk_import(in, count); |
| 796 | if (smack == NULL) |
| 797 | return -EINVAL; |
| 798 | |
Casey Schaufler | 4bc87e6 | 2008-02-15 15:24:25 -0800 | [diff] [blame] | 799 | mutex_lock(&smack_ambient_lock); |
| 800 | |
| 801 | oldambient = smack_net_ambient; |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 802 | smack_net_ambient = smack; |
Casey Schaufler | 4bc87e6 | 2008-02-15 15:24:25 -0800 | [diff] [blame] | 803 | smk_unlbl_ambient(oldambient); |
| 804 | |
| 805 | mutex_unlock(&smack_ambient_lock); |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 806 | |
| 807 | return count; |
| 808 | } |
| 809 | |
| 810 | static const struct file_operations smk_ambient_ops = { |
| 811 | .read = smk_read_ambient, |
| 812 | .write = smk_write_ambient, |
| 813 | }; |
| 814 | |
Casey Schaufler | 1544623 | 2008-07-30 15:37:11 -0700 | [diff] [blame] | 815 | /** |
| 816 | * smk_read_onlycap - read() for /smack/onlycap |
| 817 | * @filp: file pointer, not actually used |
| 818 | * @buf: where to put the result |
| 819 | * @cn: maximum to send along |
| 820 | * @ppos: where to start |
| 821 | * |
| 822 | * Returns number of bytes read or error code, as appropriate |
| 823 | */ |
| 824 | static ssize_t smk_read_onlycap(struct file *filp, char __user *buf, |
| 825 | size_t cn, loff_t *ppos) |
| 826 | { |
| 827 | char *smack = ""; |
| 828 | ssize_t rc = -EINVAL; |
| 829 | int asize; |
| 830 | |
| 831 | if (*ppos != 0) |
| 832 | return 0; |
| 833 | |
| 834 | if (smack_onlycap != NULL) |
| 835 | smack = smack_onlycap; |
| 836 | |
| 837 | asize = strlen(smack) + 1; |
| 838 | |
| 839 | if (cn >= asize) |
| 840 | rc = simple_read_from_buffer(buf, cn, ppos, smack, asize); |
| 841 | |
| 842 | return rc; |
| 843 | } |
| 844 | |
| 845 | /** |
| 846 | * smk_write_onlycap - write() for /smack/onlycap |
| 847 | * @filp: file pointer, not actually used |
| 848 | * @buf: where to get the data from |
| 849 | * @count: bytes sent |
| 850 | * @ppos: where to start |
| 851 | * |
| 852 | * Returns number of bytes written or error code, as appropriate |
| 853 | */ |
| 854 | static ssize_t smk_write_onlycap(struct file *file, const char __user *buf, |
| 855 | size_t count, loff_t *ppos) |
| 856 | { |
| 857 | char in[SMK_LABELLEN]; |
David Howells | b6dff3e | 2008-11-14 10:39:16 +1100 | [diff] [blame] | 858 | char *sp = current->cred->security; |
Casey Schaufler | 1544623 | 2008-07-30 15:37:11 -0700 | [diff] [blame] | 859 | |
| 860 | if (!capable(CAP_MAC_ADMIN)) |
| 861 | return -EPERM; |
| 862 | |
| 863 | /* |
| 864 | * This can be done using smk_access() but is done |
| 865 | * explicitly for clarity. The smk_access() implementation |
| 866 | * would use smk_access(smack_onlycap, MAY_WRITE) |
| 867 | */ |
| 868 | if (smack_onlycap != NULL && smack_onlycap != sp) |
| 869 | return -EPERM; |
| 870 | |
| 871 | if (count >= SMK_LABELLEN) |
| 872 | return -EINVAL; |
| 873 | |
| 874 | if (copy_from_user(in, buf, count) != 0) |
| 875 | return -EFAULT; |
| 876 | |
| 877 | /* |
| 878 | * Should the null string be passed in unset the onlycap value. |
| 879 | * This seems like something to be careful with as usually |
| 880 | * smk_import only expects to return NULL for errors. It |
| 881 | * is usually the case that a nullstring or "\n" would be |
| 882 | * bad to pass to smk_import but in fact this is useful here. |
| 883 | */ |
| 884 | smack_onlycap = smk_import(in, count); |
| 885 | |
| 886 | return count; |
| 887 | } |
| 888 | |
| 889 | static const struct file_operations smk_onlycap_ops = { |
| 890 | .read = smk_read_onlycap, |
| 891 | .write = smk_write_onlycap, |
| 892 | }; |
| 893 | |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 894 | struct option_names { |
| 895 | int o_number; |
| 896 | char *o_name; |
| 897 | char *o_alias; |
| 898 | }; |
| 899 | |
| 900 | static struct option_names netlbl_choices[] = { |
| 901 | { NETLBL_NLTYPE_RIPSO, |
| 902 | NETLBL_NLTYPE_RIPSO_NAME, "ripso" }, |
| 903 | { NETLBL_NLTYPE_CIPSOV4, |
| 904 | NETLBL_NLTYPE_CIPSOV4_NAME, "cipsov4" }, |
| 905 | { NETLBL_NLTYPE_CIPSOV4, |
| 906 | NETLBL_NLTYPE_CIPSOV4_NAME, "cipso" }, |
| 907 | { NETLBL_NLTYPE_CIPSOV6, |
| 908 | NETLBL_NLTYPE_CIPSOV6_NAME, "cipsov6" }, |
| 909 | { NETLBL_NLTYPE_UNLABELED, |
| 910 | NETLBL_NLTYPE_UNLABELED_NAME, "unlabeled" }, |
| 911 | }; |
| 912 | |
| 913 | /** |
| 914 | * smk_read_nltype - read() for /smack/nltype |
| 915 | * @filp: file pointer, not actually used |
| 916 | * @buf: where to put the result |
| 917 | * @count: maximum to send along |
| 918 | * @ppos: where to start |
| 919 | * |
| 920 | * Returns number of bytes read or error code, as appropriate |
| 921 | */ |
| 922 | static ssize_t smk_read_nltype(struct file *filp, char __user *buf, |
| 923 | size_t count, loff_t *ppos) |
| 924 | { |
| 925 | char bound[40]; |
| 926 | ssize_t rc; |
| 927 | int i; |
| 928 | |
| 929 | if (count < SMK_LABELLEN) |
| 930 | return -EINVAL; |
| 931 | |
| 932 | if (*ppos != 0) |
| 933 | return 0; |
| 934 | |
| 935 | sprintf(bound, "unknown"); |
| 936 | |
| 937 | for (i = 0; i < ARRAY_SIZE(netlbl_choices); i++) |
| 938 | if (smack_net_nltype == netlbl_choices[i].o_number) { |
| 939 | sprintf(bound, "%s", netlbl_choices[i].o_name); |
| 940 | break; |
| 941 | } |
| 942 | |
| 943 | rc = simple_read_from_buffer(buf, count, ppos, bound, strlen(bound)); |
| 944 | |
| 945 | return rc; |
| 946 | } |
| 947 | |
| 948 | /** |
| 949 | * smk_write_nltype - write() for /smack/nltype |
| 950 | * @filp: file pointer, not actually used |
| 951 | * @buf: where to get the data from |
| 952 | * @count: bytes sent |
| 953 | * @ppos: where to start |
| 954 | * |
| 955 | * Returns number of bytes written or error code, as appropriate |
| 956 | */ |
| 957 | static ssize_t smk_write_nltype(struct file *file, const char __user *buf, |
| 958 | size_t count, loff_t *ppos) |
| 959 | { |
| 960 | char bound[40]; |
| 961 | char *cp; |
| 962 | int i; |
| 963 | |
| 964 | if (!capable(CAP_MAC_ADMIN)) |
| 965 | return -EPERM; |
| 966 | |
| 967 | if (count >= 40) |
| 968 | return -EINVAL; |
| 969 | |
| 970 | if (copy_from_user(bound, buf, count) != 0) |
| 971 | return -EFAULT; |
| 972 | |
| 973 | bound[count] = '\0'; |
| 974 | cp = strchr(bound, ' '); |
| 975 | if (cp != NULL) |
| 976 | *cp = '\0'; |
| 977 | cp = strchr(bound, '\n'); |
| 978 | if (cp != NULL) |
| 979 | *cp = '\0'; |
| 980 | |
| 981 | for (i = 0; i < ARRAY_SIZE(netlbl_choices); i++) |
| 982 | if (strcmp(bound, netlbl_choices[i].o_name) == 0 || |
| 983 | strcmp(bound, netlbl_choices[i].o_alias) == 0) { |
| 984 | smack_net_nltype = netlbl_choices[i].o_number; |
| 985 | return count; |
| 986 | } |
| 987 | /* |
| 988 | * Not a valid choice. |
| 989 | */ |
| 990 | return -EINVAL; |
| 991 | } |
| 992 | |
| 993 | static const struct file_operations smk_nltype_ops = { |
| 994 | .read = smk_read_nltype, |
| 995 | .write = smk_write_nltype, |
| 996 | }; |
| 997 | |
| 998 | /** |
| 999 | * smk_fill_super - fill the /smackfs superblock |
| 1000 | * @sb: the empty superblock |
| 1001 | * @data: unused |
| 1002 | * @silent: unused |
| 1003 | * |
| 1004 | * Fill in the well known entries for /smack |
| 1005 | * |
| 1006 | * Returns 0 on success, an error code on failure |
| 1007 | */ |
| 1008 | static int smk_fill_super(struct super_block *sb, void *data, int silent) |
| 1009 | { |
| 1010 | int rc; |
| 1011 | struct inode *root_inode; |
| 1012 | |
| 1013 | static struct tree_descr smack_files[] = { |
| 1014 | [SMK_LOAD] = |
| 1015 | {"load", &smk_load_ops, S_IRUGO|S_IWUSR}, |
| 1016 | [SMK_CIPSO] = |
| 1017 | {"cipso", &smk_cipso_ops, S_IRUGO|S_IWUSR}, |
| 1018 | [SMK_DOI] = |
| 1019 | {"doi", &smk_doi_ops, S_IRUGO|S_IWUSR}, |
| 1020 | [SMK_DIRECT] = |
| 1021 | {"direct", &smk_direct_ops, S_IRUGO|S_IWUSR}, |
| 1022 | [SMK_AMBIENT] = |
| 1023 | {"ambient", &smk_ambient_ops, S_IRUGO|S_IWUSR}, |
| 1024 | [SMK_NLTYPE] = |
| 1025 | {"nltype", &smk_nltype_ops, S_IRUGO|S_IWUSR}, |
Casey Schaufler | 1544623 | 2008-07-30 15:37:11 -0700 | [diff] [blame] | 1026 | [SMK_ONLYCAP] = |
| 1027 | {"onlycap", &smk_onlycap_ops, S_IRUGO|S_IWUSR}, |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 1028 | /* last one */ {""} |
| 1029 | }; |
| 1030 | |
| 1031 | rc = simple_fill_super(sb, SMACK_MAGIC, smack_files); |
| 1032 | if (rc != 0) { |
| 1033 | printk(KERN_ERR "%s failed %d while creating inodes\n", |
| 1034 | __func__, rc); |
| 1035 | return rc; |
| 1036 | } |
| 1037 | |
| 1038 | root_inode = sb->s_root->d_inode; |
| 1039 | root_inode->i_security = new_inode_smack(smack_known_floor.smk_known); |
| 1040 | |
| 1041 | return 0; |
| 1042 | } |
| 1043 | |
| 1044 | /** |
| 1045 | * smk_get_sb - get the smackfs superblock |
| 1046 | * @fs_type: passed along without comment |
| 1047 | * @flags: passed along without comment |
| 1048 | * @dev_name: passed along without comment |
| 1049 | * @data: passed along without comment |
| 1050 | * @mnt: passed along without comment |
| 1051 | * |
| 1052 | * Just passes everything along. |
| 1053 | * |
| 1054 | * Returns what the lower level code does. |
| 1055 | */ |
| 1056 | static int smk_get_sb(struct file_system_type *fs_type, |
| 1057 | int flags, const char *dev_name, void *data, |
| 1058 | struct vfsmount *mnt) |
| 1059 | { |
| 1060 | return get_sb_single(fs_type, flags, data, smk_fill_super, mnt); |
| 1061 | } |
| 1062 | |
| 1063 | static struct file_system_type smk_fs_type = { |
| 1064 | .name = "smackfs", |
| 1065 | .get_sb = smk_get_sb, |
| 1066 | .kill_sb = kill_litter_super, |
| 1067 | }; |
| 1068 | |
| 1069 | static struct vfsmount *smackfs_mount; |
| 1070 | |
| 1071 | /** |
| 1072 | * init_smk_fs - get the smackfs superblock |
| 1073 | * |
| 1074 | * register the smackfs |
| 1075 | * |
Ahmed S. Darwish | 076c54c | 2008-03-06 18:09:10 +0200 | [diff] [blame] | 1076 | * Do not register smackfs if Smack wasn't enabled |
| 1077 | * on boot. We can not put this method normally under the |
| 1078 | * smack_init() code path since the security subsystem get |
| 1079 | * initialized before the vfs caches. |
| 1080 | * |
| 1081 | * Returns true if we were not chosen on boot or if |
| 1082 | * we were chosen and filesystem registration succeeded. |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 1083 | */ |
| 1084 | static int __init init_smk_fs(void) |
| 1085 | { |
| 1086 | int err; |
| 1087 | |
Ahmed S. Darwish | 076c54c | 2008-03-06 18:09:10 +0200 | [diff] [blame] | 1088 | if (!security_module_enable(&smack_ops)) |
| 1089 | return 0; |
| 1090 | |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 1091 | err = register_filesystem(&smk_fs_type); |
| 1092 | if (!err) { |
| 1093 | smackfs_mount = kern_mount(&smk_fs_type); |
| 1094 | if (IS_ERR(smackfs_mount)) { |
| 1095 | printk(KERN_ERR "smackfs: could not mount!\n"); |
| 1096 | err = PTR_ERR(smackfs_mount); |
| 1097 | smackfs_mount = NULL; |
| 1098 | } |
| 1099 | } |
| 1100 | |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 1101 | smk_cipso_doi(); |
Casey Schaufler | 4bc87e6 | 2008-02-15 15:24:25 -0800 | [diff] [blame] | 1102 | smk_unlbl_ambient(NULL); |
Casey Schaufler | e114e47 | 2008-02-04 22:29:50 -0800 | [diff] [blame] | 1103 | |
| 1104 | return err; |
| 1105 | } |
| 1106 | |
| 1107 | __initcall(init_smk_fs); |