mirror of https://gitee.com/openkylin/linux.git
TOMOYO: Rename meminfo to stat and show more statistics.
Show statistics such as last policy update time and last policy violation time in addition to memory usage. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
This commit is contained in:
Tetsuo Handa
James Morris
parent
2c47ab9353
commit
b22b8b9fd9
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@ -9,47 +9,6 @@
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#include "common.h"
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#include <linux/slab.h>
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/**
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* tomoyo_convert_time - Convert time_t to YYYY/MM/DD hh/mm/ss.
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*
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* @time: Seconds since 1970/01/01 00:00:00.
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* @stamp: Pointer to "struct tomoyo_time".
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*
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* Returns nothing.
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*
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* This function does not handle Y2038 problem.
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*/
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static void tomoyo_convert_time(time_t time, struct tomoyo_time *stamp)
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{
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static const u16 tomoyo_eom[2][12] = {
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{ 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 },
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{ 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 }
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};
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u16 y;
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u8 m;
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bool r;
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stamp->sec = time % 60;
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time /= 60;
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stamp->min = time % 60;
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time /= 60;
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stamp->hour = time % 24;
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time /= 24;
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for (y = 1970; ; y++) {
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const unsigned short days = (y & 3) ? 365 : 366;
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if (time < days)
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break;
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time -= days;
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}
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r = (y & 3) == 0;
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for (m = 0; m < 11 && time >= tomoyo_eom[r][m]; m++)
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;
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if (m)
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time -= tomoyo_eom[r][m - 1];
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stamp->year = y;
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stamp->month = ++m;
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stamp->day = ++time;
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}
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/**
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* tomoyo_print_header - Get header line of audit log.
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*
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@ -1584,8 +1584,9 @@ static void tomoyo_add_entry(struct tomoyo_domain_info *domain, char *header)
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return;
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snprintf(buffer, len - 1, "%s", cp);
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tomoyo_normalize_line(buffer);
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tomoyo_write_domain2(domain->ns, &domain->acl_info_list, buffer,
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false);
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if (!tomoyo_write_domain2(domain->ns, &domain->acl_info_list, buffer,
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false))
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tomoyo_update_stat(TOMOYO_STAT_POLICY_UPDATES);
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kfree(buffer);
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}
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@ -1618,6 +1619,8 @@ int tomoyo_supervisor(struct tomoyo_request_info *r, const char *fmt, ...)
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/* Nothing more to do if granted. */
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if (r->granted)
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return 0;
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if (r->mode)
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tomoyo_update_stat(r->mode);
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switch (r->mode) {
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case TOMOYO_CONFIG_ENFORCING:
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error = -EPERM;
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@ -1857,6 +1860,104 @@ static void tomoyo_read_self_domain(struct tomoyo_io_buffer *head)
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}
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}
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/* String table for /sys/kernel/security/tomoyo/stat interface. */
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static const char * const tomoyo_policy_headers[TOMOYO_MAX_POLICY_STAT] = {
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[TOMOYO_STAT_POLICY_UPDATES] = "update:",
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[TOMOYO_STAT_POLICY_LEARNING] = "violation in learning mode:",
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[TOMOYO_STAT_POLICY_PERMISSIVE] = "violation in permissive mode:",
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[TOMOYO_STAT_POLICY_ENFORCING] = "violation in enforcing mode:",
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};
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/* String table for /sys/kernel/security/tomoyo/stat interface. */
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static const char * const tomoyo_memory_headers[TOMOYO_MAX_MEMORY_STAT] = {
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[TOMOYO_MEMORY_POLICY] = "policy:",
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[TOMOYO_MEMORY_AUDIT] = "audit log:",
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[TOMOYO_MEMORY_QUERY] = "query message:",
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};
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/* Timestamp counter for last updated. */
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static unsigned int tomoyo_stat_updated[TOMOYO_MAX_POLICY_STAT];
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/* Counter for number of updates. */
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static unsigned int tomoyo_stat_modified[TOMOYO_MAX_POLICY_STAT];
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/**
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* tomoyo_update_stat - Update statistic counters.
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*
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* @index: Index for policy type.
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*
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* Returns nothing.
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*/
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void tomoyo_update_stat(const u8 index)
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{
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struct timeval tv;
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do_gettimeofday(&tv);
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/*
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* I don't use atomic operations because race condition is not fatal.
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*/
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tomoyo_stat_updated[index]++;
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tomoyo_stat_modified[index] = tv.tv_sec;
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}
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/**
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* tomoyo_read_stat - Read statistic data.
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*
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* @head: Pointer to "struct tomoyo_io_buffer".
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*
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* Returns nothing.
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*/
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static void tomoyo_read_stat(struct tomoyo_io_buffer *head)
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{
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u8 i;
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unsigned int total = 0;
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if (head->r.eof)
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return;
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for (i = 0; i < TOMOYO_MAX_POLICY_STAT; i++) {
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tomoyo_io_printf(head, "Policy %-30s %10u",
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tomoyo_policy_headers[i],
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tomoyo_stat_updated[i]);
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if (tomoyo_stat_modified[i]) {
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struct tomoyo_time stamp;
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tomoyo_convert_time(tomoyo_stat_modified[i], &stamp);
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tomoyo_io_printf(head, " (Last: %04u/%02u/%02u "
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"%02u:%02u:%02u)",
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stamp.year, stamp.month, stamp.day,
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stamp.hour, stamp.min, stamp.sec);
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}
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tomoyo_set_lf(head);
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}
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for (i = 0; i < TOMOYO_MAX_MEMORY_STAT; i++) {
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unsigned int used = tomoyo_memory_used[i];
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total += used;
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tomoyo_io_printf(head, "Memory used by %-22s %10u",
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tomoyo_memory_headers[i], used);
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used = tomoyo_memory_quota[i];
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if (used)
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tomoyo_io_printf(head, " (Quota: %10u)", used);
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tomoyo_set_lf(head);
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}
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tomoyo_io_printf(head, "Total memory used: %10u\n",
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total);
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head->r.eof = true;
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}
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/**
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* tomoyo_write_stat - Set memory quota.
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*
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* @head: Pointer to "struct tomoyo_io_buffer".
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*
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* Returns 0.
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*/
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static int tomoyo_write_stat(struct tomoyo_io_buffer *head)
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{
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char *data = head->write_buf;
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u8 i;
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if (tomoyo_str_starts(&data, "Memory used by "))
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for (i = 0; i < TOMOYO_MAX_MEMORY_STAT; i++)
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if (tomoyo_str_starts(&data, tomoyo_memory_headers[i]))
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sscanf(data, "%u", &tomoyo_memory_quota[i]);
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return 0;
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}
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/**
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* tomoyo_open_control - open() for /sys/kernel/security/tomoyo/ interface.
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*
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@ -1908,11 +2009,11 @@ int tomoyo_open_control(const u8 type, struct file *file)
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head->read = tomoyo_read_version;
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head->readbuf_size = 128;
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break;
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case TOMOYO_MEMINFO:
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/* /sys/kernel/security/tomoyo/meminfo */
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head->write = tomoyo_write_memory_quota;
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head->read = tomoyo_read_memory_counter;
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head->readbuf_size = 512;
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case TOMOYO_STAT:
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/* /sys/kernel/security/tomoyo/stat */
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head->write = tomoyo_write_stat;
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head->read = tomoyo_read_stat;
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head->readbuf_size = 1024;
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break;
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case TOMOYO_PROFILE:
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/* /sys/kernel/security/tomoyo/profile */
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@ -2186,6 +2287,20 @@ ssize_t tomoyo_write_control(struct tomoyo_io_buffer *head,
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case -EPERM:
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error = -EPERM;
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goto out;
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case 0:
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switch (head->type) {
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case TOMOYO_DOMAINPOLICY:
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case TOMOYO_EXCEPTIONPOLICY:
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case TOMOYO_DOMAIN_STATUS:
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case TOMOYO_STAT:
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case TOMOYO_PROFILE:
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case TOMOYO_MANAGER:
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tomoyo_update_stat(TOMOYO_STAT_POLICY_UPDATES);
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break;
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default:
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break;
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}
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break;
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}
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}
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out:
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@ -133,6 +133,7 @@ enum tomoyo_path_acl_index {
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TOMOYO_MAX_PATH_OPERATION
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};
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/* Index numbers for /sys/kernel/security/tomoyo/stat interface. */
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enum tomoyo_memory_stat_type {
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TOMOYO_MEMORY_POLICY,
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TOMOYO_MEMORY_AUDIT,
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@ -173,7 +174,7 @@ enum tomoyo_securityfs_interface_index {
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TOMOYO_EXCEPTIONPOLICY,
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TOMOYO_DOMAIN_STATUS,
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TOMOYO_PROCESS_STATUS,
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TOMOYO_MEMINFO,
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TOMOYO_STAT,
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TOMOYO_SELFDOMAIN,
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TOMOYO_AUDIT,
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TOMOYO_VERSION,
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@ -237,6 +238,16 @@ enum tomoyo_mac_category_index {
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*/
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#define TOMOYO_RETRY_REQUEST 1
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/* Index numbers for /sys/kernel/security/tomoyo/stat interface. */
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enum tomoyo_policy_stat_type {
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/* Do not change this order. */
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TOMOYO_STAT_POLICY_UPDATES,
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TOMOYO_STAT_POLICY_LEARNING, /* == TOMOYO_CONFIG_LEARNING */
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TOMOYO_STAT_POLICY_PERMISSIVE, /* == TOMOYO_CONFIG_PERMISSIVE */
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TOMOYO_STAT_POLICY_ENFORCING, /* == TOMOYO_CONFIG_ENFORCING */
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TOMOYO_MAX_POLICY_STAT
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};
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/* Index numbers for profile's PREFERENCE values. */
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enum tomoyo_pref_index {
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TOMOYO_PREF_MAX_AUDIT_LOG,
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@ -648,8 +659,8 @@ char *tomoyo_realpath_from_path(struct path *path);
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bool tomoyo_memory_ok(void *ptr);
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void *tomoyo_commit_ok(void *data, const unsigned int size);
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const struct tomoyo_path_info *tomoyo_get_name(const char *name);
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void tomoyo_read_memory_counter(struct tomoyo_io_buffer *head);
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int tomoyo_write_memory_quota(struct tomoyo_io_buffer *head);
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void tomoyo_convert_time(time_t time, struct tomoyo_time *stamp);
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void tomoyo_update_stat(const u8 index);
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void __init tomoyo_mm_init(void);
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int tomoyo_path_permission(struct tomoyo_request_info *r, u8 operation,
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const struct tomoyo_path_info *filename);
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@ -29,16 +29,13 @@ void tomoyo_warn_oom(const char *function)
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panic("MAC Initialization failed.\n");
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}
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/* Lock for protecting tomoyo_memory_used. */
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static DEFINE_SPINLOCK(tomoyo_policy_memory_lock);
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/* Memoy currently used by policy/audit log/query. */
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unsigned int tomoyo_memory_used[TOMOYO_MAX_MEMORY_STAT];
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/* Memory quota for "policy"/"audit log"/"query". */
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unsigned int tomoyo_memory_quota[TOMOYO_MAX_MEMORY_STAT];
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/* Memory allocated for policy. */
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static atomic_t tomoyo_policy_memory_size;
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/* Quota for holding policy. */
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static unsigned int tomoyo_quota_for_policy;
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/**
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* tomoyo_memory_ok - Check memory quota.
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*
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@ -50,15 +47,20 @@ static unsigned int tomoyo_quota_for_policy;
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*/
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bool tomoyo_memory_ok(void *ptr)
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{
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size_t s = ptr ? ksize(ptr) : 0;
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atomic_add(s, &tomoyo_policy_memory_size);
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if (ptr && (!tomoyo_quota_for_policy ||
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atomic_read(&tomoyo_policy_memory_size)
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<= tomoyo_quota_for_policy)) {
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memset(ptr, 0, s);
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if (ptr) {
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const size_t s = ksize(ptr);
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bool result;
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spin_lock(&tomoyo_policy_memory_lock);
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tomoyo_memory_used[TOMOYO_MEMORY_POLICY] += s;
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result = !tomoyo_memory_quota[TOMOYO_MEMORY_POLICY] ||
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tomoyo_memory_used[TOMOYO_MEMORY_POLICY] <=
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tomoyo_memory_quota[TOMOYO_MEMORY_POLICY];
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if (!result)
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tomoyo_memory_used[TOMOYO_MEMORY_POLICY] -= s;
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spin_unlock(&tomoyo_policy_memory_lock);
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if (result)
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return true;
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}
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atomic_sub(s, &tomoyo_policy_memory_size);
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tomoyo_warn_oom(__func__);
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return false;
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}
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@ -91,7 +93,10 @@ void *tomoyo_commit_ok(void *data, const unsigned int size)
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*/
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void tomoyo_memory_free(void *ptr)
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{
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atomic_sub(ksize(ptr), &tomoyo_policy_memory_size);
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size_t s = ksize(ptr);
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spin_lock(&tomoyo_policy_memory_lock);
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tomoyo_memory_used[TOMOYO_MEMORY_POLICY] -= s;
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spin_unlock(&tomoyo_policy_memory_lock);
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kfree(ptr);
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}
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@ -162,7 +167,6 @@ const struct tomoyo_path_info *tomoyo_get_name(const char *name)
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struct tomoyo_name *ptr;
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unsigned int hash;
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int len;
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int allocated_len;
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struct list_head *head;
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if (!name)
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@ -179,22 +183,17 @@ const struct tomoyo_path_info *tomoyo_get_name(const char *name)
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goto out;
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}
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ptr = kzalloc(sizeof(*ptr) + len, GFP_NOFS);
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allocated_len = ptr ? ksize(ptr) : 0;
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if (!ptr || (tomoyo_quota_for_policy &&
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atomic_read(&tomoyo_policy_memory_size) + allocated_len
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> tomoyo_quota_for_policy)) {
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kfree(ptr);
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ptr = NULL;
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tomoyo_warn_oom(__func__);
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goto out;
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}
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atomic_add(allocated_len, &tomoyo_policy_memory_size);
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if (tomoyo_memory_ok(ptr)) {
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ptr->entry.name = ((char *) ptr) + sizeof(*ptr);
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memmove((char *) ptr->entry.name, name, len);
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atomic_set(&ptr->head.users, 1);
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tomoyo_fill_path_info(&ptr->entry);
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list_add_tail(&ptr->head.list, head);
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out:
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} else {
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kfree(ptr);
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ptr = NULL;
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}
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out:
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mutex_unlock(&tomoyo_policy_lock);
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return ptr ? &ptr->entry : NULL;
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}
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@ -227,65 +226,3 @@ void __init tomoyo_mm_init(void)
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}
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#endif
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}
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/* Memory allocated for query lists. */
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unsigned int tomoyo_query_memory_size;
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/* Quota for holding query lists. */
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unsigned int tomoyo_quota_for_query;
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/**
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* tomoyo_read_memory_counter - Check for memory usage in bytes.
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*
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* @head: Pointer to "struct tomoyo_io_buffer".
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*
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* Returns memory usage.
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*/
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void tomoyo_read_memory_counter(struct tomoyo_io_buffer *head)
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{
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if (!head->r.eof) {
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const unsigned int policy
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= atomic_read(&tomoyo_policy_memory_size);
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const unsigned int query = tomoyo_query_memory_size;
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char buffer[64];
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memset(buffer, 0, sizeof(buffer));
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if (tomoyo_quota_for_policy)
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snprintf(buffer, sizeof(buffer) - 1,
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" (Quota: %10u)",
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tomoyo_quota_for_policy);
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else
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buffer[0] = '\0';
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tomoyo_io_printf(head, "Policy: %10u%s\n", policy,
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buffer);
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if (tomoyo_quota_for_query)
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snprintf(buffer, sizeof(buffer) - 1,
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" (Quota: %10u)",
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tomoyo_quota_for_query);
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else
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buffer[0] = '\0';
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tomoyo_io_printf(head, "Query lists: %10u%s\n", query,
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buffer);
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tomoyo_io_printf(head, "Total: %10u\n", policy + query);
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head->r.eof = true;
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}
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}
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/**
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* tomoyo_write_memory_quota - Set memory quota.
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*
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* @head: Pointer to "struct tomoyo_io_buffer".
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*
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* Returns 0.
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*/
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int tomoyo_write_memory_quota(struct tomoyo_io_buffer *head)
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{
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char *data = head->write_buf;
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unsigned int size;
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if (sscanf(data, "Policy: %u", &size) == 1)
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tomoyo_quota_for_policy = size;
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else if (sscanf(data, "Query lists: %u", &size) == 1)
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tomoyo_quota_for_query = size;
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return 0;
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}
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@ -143,8 +143,8 @@ static int __init tomoyo_initerface_init(void)
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TOMOYO_DOMAIN_STATUS);
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tomoyo_create_entry(".process_status", 0600, tomoyo_dir,
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TOMOYO_PROCESS_STATUS);
|
||||
tomoyo_create_entry("meminfo", 0600, tomoyo_dir,
|
||||
TOMOYO_MEMINFO);
|
||||
tomoyo_create_entry("stat", 0644, tomoyo_dir,
|
||||
TOMOYO_STAT);
|
||||
tomoyo_create_entry("profile", 0600, tomoyo_dir,
|
||||
TOMOYO_PROFILE);
|
||||
tomoyo_create_entry("manager", 0600, tomoyo_dir,
|
||||
|
|
|
|||
|
|
@ -46,6 +46,47 @@ const u8 tomoyo_index2category[TOMOYO_MAX_MAC_INDEX] = {
|
|||
[TOMOYO_MAC_FILE_PIVOT_ROOT] = TOMOYO_MAC_CATEGORY_FILE,
|
||||
};
|
||||
|
||||
/**
|
||||
* tomoyo_convert_time - Convert time_t to YYYY/MM/DD hh/mm/ss.
|
||||
*
|
||||
* @time: Seconds since 1970/01/01 00:00:00.
|
||||
* @stamp: Pointer to "struct tomoyo_time".
|
||||
*
|
||||
* Returns nothing.
|
||||
*
|
||||
* This function does not handle Y2038 problem.
|
||||
*/
|
||||
void tomoyo_convert_time(time_t time, struct tomoyo_time *stamp)
|
||||
{
|
||||
static const u16 tomoyo_eom[2][12] = {
|
||||
{ 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 },
|
||||
{ 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 }
|
||||
};
|
||||
u16 y;
|
||||
u8 m;
|
||||
bool r;
|
||||
stamp->sec = time % 60;
|
||||
time /= 60;
|
||||
stamp->min = time % 60;
|
||||
time /= 60;
|
||||
stamp->hour = time % 24;
|
||||
time /= 24;
|
||||
for (y = 1970; ; y++) {
|
||||
const unsigned short days = (y & 3) ? 365 : 366;
|
||||
if (time < days)
|
||||
break;
|
||||
time -= days;
|
||||
}
|
||||
r = (y & 3) == 0;
|
||||
for (m = 0; m < 11 && time >= tomoyo_eom[r][m]; m++)
|
||||
;
|
||||
if (m)
|
||||
time -= tomoyo_eom[r][m - 1];
|
||||
stamp->year = y;
|
||||
stamp->month = ++m;
|
||||
stamp->day = ++time;
|
||||
}
|
||||
|
||||
/**
|
||||
* tomoyo_permstr - Find permission keywords.
|
||||
*
|
||||
|
|
|
|||
Loading…
Reference in New Issue