diff options
Diffstat (limited to 'security/tomoyo/common.c')
| -rw-r--r-- | security/tomoyo/common.c | 129 |
1 files changed, 122 insertions, 7 deletions
diff --git a/security/tomoyo/common.c b/security/tomoyo/common.c index 6402183e2a6..7bc0d1d9586 100644 --- a/security/tomoyo/common.c +++ b/security/tomoyo/common.c @@ -1584,8 +1584,9 @@ static void tomoyo_add_entry(struct tomoyo_domain_info *domain, char *header) return; snprintf(buffer, len - 1, "%s", cp); tomoyo_normalize_line(buffer); - tomoyo_write_domain2(domain->ns, &domain->acl_info_list, buffer, - false); + if (!tomoyo_write_domain2(domain->ns, &domain->acl_info_list, buffer, + false)) + tomoyo_update_stat(TOMOYO_STAT_POLICY_UPDATES); kfree(buffer); } @@ -1618,6 +1619,8 @@ int tomoyo_supervisor(struct tomoyo_request_info *r, const char *fmt, ...) /* Nothing more to do if granted. */ if (r->granted) return 0; + if (r->mode) + tomoyo_update_stat(r->mode); switch (r->mode) { case TOMOYO_CONFIG_ENFORCING: error = -EPERM; @@ -1857,6 +1860,104 @@ static void tomoyo_read_self_domain(struct tomoyo_io_buffer *head) } } +/* String table for /sys/kernel/security/tomoyo/stat interface. */ +static const char * const tomoyo_policy_headers[TOMOYO_MAX_POLICY_STAT] = { + [TOMOYO_STAT_POLICY_UPDATES] = "update:", + [TOMOYO_STAT_POLICY_LEARNING] = "violation in learning mode:", + [TOMOYO_STAT_POLICY_PERMISSIVE] = "violation in permissive mode:", + [TOMOYO_STAT_POLICY_ENFORCING] = "violation in enforcing mode:", +}; + +/* String table for /sys/kernel/security/tomoyo/stat interface. */ +static const char * const tomoyo_memory_headers[TOMOYO_MAX_MEMORY_STAT] = { + [TOMOYO_MEMORY_POLICY] = "policy:", + [TOMOYO_MEMORY_AUDIT] = "audit log:", + [TOMOYO_MEMORY_QUERY] = "query message:", +}; + +/* Timestamp counter for last updated. */ +static unsigned int tomoyo_stat_updated[TOMOYO_MAX_POLICY_STAT]; +/* Counter for number of updates. */ +static unsigned int tomoyo_stat_modified[TOMOYO_MAX_POLICY_STAT]; + +/** + * tomoyo_update_stat - Update statistic counters. + * + * @index: Index for policy type. + * + * Returns nothing. + */ +void tomoyo_update_stat(const u8 index) +{ + struct timeval tv; + do_gettimeofday(&tv); + /* + * I don't use atomic operations because race condition is not fatal. + */ + tomoyo_stat_updated[index]++; + tomoyo_stat_modified[index] = tv.tv_sec; +} + +/** + * tomoyo_read_stat - Read statistic data. + * + * @head: Pointer to "struct tomoyo_io_buffer". + * + * Returns nothing. + */ +static void tomoyo_read_stat(struct tomoyo_io_buffer *head) +{ + u8 i; + unsigned int total = 0; + if (head->r.eof) + return; + for (i = 0; i < TOMOYO_MAX_POLICY_STAT; i++) { + tomoyo_io_printf(head, "Policy %-30s %10u", + tomoyo_policy_headers[i], + tomoyo_stat_updated[i]); + if (tomoyo_stat_modified[i]) { + struct tomoyo_time stamp; + tomoyo_convert_time(tomoyo_stat_modified[i], &stamp); + tomoyo_io_printf(head, " (Last: %04u/%02u/%02u " + "%02u:%02u:%02u)", + stamp.year, stamp.month, stamp.day, + stamp.hour, stamp.min, stamp.sec); + } + tomoyo_set_lf(head); + } + for (i = 0; i < TOMOYO_MAX_MEMORY_STAT; i++) { + unsigned int used = tomoyo_memory_used[i]; + total += used; + tomoyo_io_printf(head, "Memory used by %-22s %10u", + tomoyo_memory_headers[i], used); + used = tomoyo_memory_quota[i]; + if (used) + tomoyo_io_printf(head, " (Quota: %10u)", used); + tomoyo_set_lf(head); + } + tomoyo_io_printf(head, "Total memory used: %10u\n", + total); + head->r.eof = true; +} + +/** + * tomoyo_write_stat - Set memory quota. + * + * @head: Pointer to "struct tomoyo_io_buffer". + * + * Returns 0. + */ +static int tomoyo_write_stat(struct tomoyo_io_buffer *head) +{ + char *data = head->write_buf; + u8 i; + if (tomoyo_str_starts(&data, "Memory used by ")) + for (i = 0; i < TOMOYO_MAX_MEMORY_STAT; i++) + if (tomoyo_str_starts(&data, tomoyo_memory_headers[i])) + sscanf(data, "%u", &tomoyo_memory_quota[i]); + return 0; +} + /** * tomoyo_open_control - open() for /sys/kernel/security/tomoyo/ interface. * @@ -1908,11 +2009,11 @@ int tomoyo_open_control(const u8 type, struct file *file) head->read = tomoyo_read_version; head->readbuf_size = 128; break; - case TOMOYO_MEMINFO: - /* /sys/kernel/security/tomoyo/meminfo */ - head->write = tomoyo_write_memory_quota; - head->read = tomoyo_read_memory_counter; - head->readbuf_size = 512; + case TOMOYO_STAT: + /* /sys/kernel/security/tomoyo/stat */ + head->write = tomoyo_write_stat; + head->read = tomoyo_read_stat; + head->readbuf_size = 1024; break; case TOMOYO_PROFILE: /* /sys/kernel/security/tomoyo/profile */ @@ -2186,6 +2287,20 @@ ssize_t tomoyo_write_control(struct tomoyo_io_buffer *head, case -EPERM: error = -EPERM; goto out; + case 0: + switch (head->type) { + case TOMOYO_DOMAINPOLICY: + case TOMOYO_EXCEPTIONPOLICY: + case TOMOYO_DOMAIN_STATUS: + case TOMOYO_STAT: + case TOMOYO_PROFILE: + case TOMOYO_MANAGER: + tomoyo_update_stat(TOMOYO_STAT_POLICY_UPDATES); + break; + default: + break; + } + break; } } out: |