#endif
#define _GNU_SOURCE
+#include <errno.h>
#include <sys/mman.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <string.h>
#include <limits.h>
+#include <sys/stat.h>
#include "connman.h"
+#define MODE (S_IRUSR | S_IWUSR | S_IXUSR | S_IRGRP | \
+ S_IXGRP | S_IROTH | S_IXOTH)
+
+#ifdef TEMP_FAILURE_RETRY
+#define TFR TEMP_FAILURE_RETRY
+#else
+#define TFR
+#endif
+
#define MAGIC 0xFA00B916
/*
* if 'roaming' has the value UINT_MAX', 'roaming' is invalid
* 'first' points to the first entry in the ring buffer
* 'last' points to the last entry in the ring buffer
+ *
+ * History file:
+ * Same format as the ring buffer file
+ * For a period of at least 2 months dayly records are keept
+ * If older, then only a monthly record is keept
*/
+
struct stats_file_header {
unsigned int magic;
unsigned int begin;
struct stats_record *last;
struct stats_record *home;
struct stats_record *roaming;
+
+ /* history */
+ char *history_name;
+ int account_period_offset;
+};
+
+struct stats_iter {
+ struct stats_file *file;
+ struct stats_record *begin;
+ struct stats_record *end;
+ struct stats_record *it;
};
GHashTable *stats_hash = NULL;
return (struct stats_record *)(file->addr + hdr->roaming);
}
-static void set_begin(struct stats_file *file, struct stats_record *begin)
-{
- struct stats_file_header *hdr;
-
- hdr = get_hdr(file);
- hdr->begin = (char *)begin - file->addr;
-}
-
static void set_end(struct stats_file *file, struct stats_record *end)
{
struct stats_file_header *hdr;
return cur;
}
+static struct stats_record *get_iterator_begin(struct stats_file *file)
+{
+ return get_next(file, get_begin(file));
+}
+
+static struct stats_record *get_iterator_end(struct stats_file *file)
+{
+ return get_next(file, get_end(file));
+}
+
static void stats_free(gpointer user_data)
{
struct stats_file *file = user_data;
+ if (file == NULL)
+ return;
+
msync(file->addr, file->len, MS_SYNC);
munmap(file->addr, file->len);
file->addr = NULL;
- close(file->fd);
+ TFR(close(file->fd));
file->fd = -1;
- g_free(file->name);
- g_free(file);
-}
-
-static int stats_create(struct connman_service *service)
-{
- struct stats_file *file;
-
- file = g_try_new0(struct stats_file, 1);
- if (file == NULL)
- return -ENOMEM;
+ if (file->history_name != NULL) {
+ g_free(file->history_name);
+ file->history_name = NULL;
+ }
- g_hash_table_insert(stats_hash, service, file);
+ if (file->name != NULL) {
+ g_free(file->name);
+ file->name = NULL;
+ }
- return 0;
+ g_free(file);
}
static void update_first(struct stats_file *file)
void *addr;
int err;
+ DBG("file %p size %zu addr %p len %zu", file, size, file->addr,
+ file->len);
+
page_size = sysconf(_SC_PAGESIZE);
new_size = (size + page_size - 1) & ~(page_size - 1);
}
if (file->addr == NULL) {
+ /*
+ * Though the buffer is not shared between processes, we still
+ * have to take MAP_SHARED because MAP_PRIVATE does not
+ * guarantee that writes will hit the file without an explicit
+ * call to munmap or msync. For more details please read the
+ * mmap man pages.
+ */
addr = mmap(NULL, new_size, PROT_READ | PROT_WRITE,
MAP_SHARED, file->fd, 0);
} else {
if (addr == MAP_FAILED) {
connman_error("mmap error %s for %s",
strerror(errno), file->name);
+ if (errno == EINVAL) {
+ connman_error("%s might be on a file system, such as "
+ "JFFS2, that does not allow shared "
+ "writable mappings.", file->name);
+ }
return -errno;
}
return 0;
}
-static int stats_open(struct connman_service *service,
- struct stats_file *file)
+static int stats_open(struct stats_file *file,
+ const char *name)
{
- struct stat st;
- int err;
- size_t size;
- struct stats_file_header *hdr;
- connman_bool_t new_file = FALSE;
+ DBG("file %p name %s", file, name);
- file->name = g_strdup_printf("%s/stats/%s.data", STORAGEDIR,
- __connman_service_get_ident(service));
+ file->name = g_strdup(name);
- err = stat(file->name, &st);
- if (err < 0) {
- /* according documentation the only possible error is ENOENT */
- st.st_size = 0;
- new_file = TRUE;
+ file->fd = TFR(open(file->name, O_RDWR | O_CREAT | O_CLOEXEC, 0644));
+ if (file->fd < 0) {
+ connman_error("open error %s for %s",
+ strerror(errno), file->name);
+ g_free(file->name);
+ file->name = NULL;
+ return -errno;
}
- file->fd = open(file->name, O_RDWR | O_CREAT, 0644);
+ return 0;
+}
+static int stats_open_temp(struct stats_file *file)
+{
+ file->name = g_strdup_printf("%s/stats.XXXXXX.tmp",
+ STORAGEDIR);
+ file->fd = g_mkstemp_full(file->name, O_RDWR | O_CREAT, 0644);
if (file->fd < 0) {
- connman_error("open error %s for %s",
+ connman_error("create tempory file error %s for %s",
strerror(errno), file->name);
+ g_free(file->name);
+ file->name = NULL;
+ return -errno;
+ }
+
+ return 0;
+}
+
+static int stats_file_setup(struct stats_file *file)
+{
+ struct stats_file_header *hdr;
+ struct stat st;
+ size_t size = 0;
+ int err;
+
+ DBG("file %p fd %d name %s", file, file->fd, file->name);
+
+ err = fstat(file->fd, &st);
+ if (err < 0) {
+ connman_error("fstat error %s for %s\n",
+ strerror(errno), file->name);
+
+ TFR(close(file->fd));
+ g_free(file->name);
+ file->name = NULL;
+
return -errno;
}
+ size = (size_t)st.st_size;
file->max_len = STATS_MAX_FILE_SIZE;
- if (st.st_size < sysconf(_SC_PAGESIZE))
+ if (size < (size_t)sysconf(_SC_PAGESIZE))
size = sysconf(_SC_PAGESIZE);
- else
- size = st.st_size;
err = stats_file_remap(file, size);
- if (err < 0)
+ if (err < 0) {
+ TFR(close(file->fd));
+ g_free(file->name);
+ file->name = NULL;
+
return err;
+ }
hdr = get_hdr(file);
hdr->roaming < sizeof(struct stats_file_header) ||
hdr->begin > file->len ||
hdr->end > file->len) {
- if (new_file == FALSE) {
- /*
- * A newly created file can't have a correct
- * header so we only warn if the file already
- * existed and doesn't have a proper
- * header.
- */
- connman_warn("invalid file header for %s", file->name);
- }
-
hdr->magic = MAGIC;
hdr->begin = sizeof(struct stats_file_header);
hdr->end = sizeof(struct stats_file_header);
return 0;
}
+
+static struct stats_record *get_next_record(struct stats_iter *iter)
+{
+ if (iter->it != iter->end) {
+ struct stats_record *tmp;
+
+ tmp = iter->it;
+ iter->it = get_next(iter->file, iter->it);
+
+ return tmp;
+ }
+
+ return NULL;
+}
+
+static int append_record(struct stats_file *file,
+ struct stats_record *rec)
+{
+ struct stats_record *cur, *next;
+ int err;
+
+ if (file->last == get_end(file)) {
+ err = stats_file_remap(file, file->len +
+ sysconf(_SC_PAGESIZE));
+ if (err < 0)
+ return err;
+
+ stats_file_update_cache(file);
+ }
+
+ cur = get_end(file);
+ next = get_next(file, cur);
+
+ memcpy(next, rec, sizeof(struct stats_record));
+
+ set_end(file, next);
+
+ return 0;
+}
+
+static struct stats_record *process_file(struct stats_iter *iter,
+ struct stats_file *temp_file,
+ struct stats_record *cur,
+ GDate *date_change_step_size,
+ int account_period_offset)
+{
+ struct stats_record *home, *roaming;
+ struct stats_record *next;
+
+ home = NULL;
+ roaming = NULL;
+
+ if (cur == NULL)
+ cur = get_next_record(iter);
+ next = get_next_record(iter);
+
+ while (next != NULL) {
+ GDate date_cur;
+ GDate date_next;
+ int append;
+
+ append = FALSE;
+
+ if (cur->roaming == TRUE)
+ roaming = cur;
+ else
+ home = cur;
+
+ g_date_set_time_t(&date_cur, cur->ts);
+ g_date_set_time_t(&date_next, next->ts);
+
+ if (g_date_compare(&date_cur, date_change_step_size) < 0) {
+ /* month period size */
+ GDateDay day_cur, day_next;
+ GDateMonth month_cur, month_next;
+
+ month_cur = g_date_get_month(&date_cur);
+ month_next = g_date_get_month(&date_next);
+
+ day_cur = g_date_get_day(&date_cur);
+ day_next = g_date_get_day(&date_next);
+
+ if (day_cur == day_next && month_cur != month_next) {
+ append = TRUE;
+ } else if (day_cur < account_period_offset &&
+ day_next >= account_period_offset) {
+ append = TRUE;
+ }
+ } else {
+ /* day period size */
+ if (g_date_days_between(&date_cur, &date_next) > 0)
+ append = TRUE;
+ }
+
+ if (append == TRUE) {
+ if (home != NULL) {
+ append_record(temp_file, home);
+ home = NULL;
+ }
+
+ if (roaming != NULL) {
+ append_record(temp_file, roaming);
+ roaming = NULL;
+ }
+ }
+
+ cur = next;
+ next = get_next_record(iter);
+ }
+
+ return cur;
+}
+
+static int summarize(struct stats_file *data_file,
+ struct stats_file *history_file,
+ struct stats_file *temp_file)
+{
+ struct stats_iter data_iter;
+ struct stats_iter history_iter;
+ struct stats_record *cur, *next;
+
+ GDate today, date_change_step_size;
+
+ /*
+ * First calculate the date when switch from monthly
+ * accounting period size to daily size
+ */
+ g_date_set_time_t(&today, time(NULL));
+
+ date_change_step_size = today;
+ if (g_date_get_day(&today) - data_file->account_period_offset >= 0)
+ g_date_subtract_months(&date_change_step_size, 2);
+ else
+ g_date_subtract_months(&date_change_step_size, 3);
+
+ g_date_set_day(&date_change_step_size,
+ data_file->account_period_offset);
+
+
+ /* Now process history file */
+ cur = NULL;
+
+ if (history_file != NULL) {
+ history_iter.file = history_file;
+ history_iter.begin = get_iterator_begin(history_iter.file);
+ history_iter.end = get_iterator_end(history_iter.file);
+ history_iter.it = history_iter.begin;
+
+ cur = process_file(&history_iter, temp_file, NULL,
+ &date_change_step_size,
+ data_file->account_period_offset);
+ }
+
+ data_iter.file = data_file;
+ data_iter.begin = get_iterator_begin(data_iter.file);
+ data_iter.end = get_iterator_end(data_iter.file);
+ data_iter.it = data_iter.begin;
+
+ /*
+ * Ensure date_file records are newer than the history_file
+ * record
+ */
+ if (cur != NULL) {
+ next = get_next_record(&data_iter);
+ while (next != NULL && cur->ts > next->ts)
+ next = get_next_record(&data_iter);
+ }
+
+ /* And finally process the new data records */
+ cur = process_file(&data_iter, temp_file, cur,
+ &date_change_step_size,
+ data_file->account_period_offset);
+
+ if (cur != NULL)
+ append_record(temp_file, cur);
+
+ return 0;
+}
+
+static void stats_file_unmap(struct stats_file *file)
+{
+ msync(file->addr, file->len, MS_SYNC);
+ munmap(file->addr, file->len);
+ file->addr = NULL;
+}
+
+static void stats_file_cleanup(struct stats_file *file)
+{
+ file->fd = -1;
+ g_free(file->name);
+ file->name = NULL;
+}
+
+static int stats_file_close_swap(struct stats_file *history_file,
+ struct stats_file *temp_file)
+{
+ int err;
+
+ stats_file_unmap(history_file);
+ stats_file_unmap(temp_file);
+
+ TFR(close(temp_file->fd));
+
+ unlink(history_file->name);
+
+ err = link(temp_file->name, history_file->name);
+
+ unlink(temp_file->name);
+
+ TFR(close(history_file->fd));
+
+ stats_file_cleanup(history_file);
+ stats_file_cleanup(temp_file);
+
+ return err;
+}
+
+static int stats_file_history_update(struct stats_file *data_file)
+{
+ struct stats_file _history_file, *history_file;
+ struct stats_file _temp_file, *temp_file;
+ int err;
+
+ history_file = &_history_file;
+ temp_file = &_temp_file;
+
+ bzero(history_file, sizeof(struct stats_file));
+ bzero(temp_file, sizeof(struct stats_file));
+
+ err = stats_open(history_file, data_file->history_name);
+ if (err < 0)
+ return err;
+ stats_file_setup(history_file);
+
+ err = stats_open_temp(temp_file);
+ if (err < 0) {
+ stats_free(history_file);
+ return err;
+ }
+ stats_file_setup(temp_file);
+
+ summarize(data_file, history_file, temp_file);
+
+ err = stats_file_close_swap(history_file, temp_file);
+
+ return err;
+}
+
int __connman_stats_service_register(struct connman_service *service)
{
struct stats_file *file;
+ char *name, *dir;
int err;
DBG("service %p", service);
file = g_hash_table_lookup(stats_hash, service);
if (file == NULL) {
- err = stats_create(service);
-
- if (err < 0)
- return err;
+ file = g_try_new0(struct stats_file, 1);
+ if (file == NULL)
+ return -ENOMEM;
- file = g_hash_table_lookup(stats_hash, service);
+ g_hash_table_insert(stats_hash, service, file);
} else {
return -EALREADY;
}
- err = stats_open(service, file);
+ dir = g_strdup_printf("%s/%s", STORAGEDIR,
+ __connman_service_get_ident(service));
+
+ /* If the dir doesn't exist, create it */
+ if (!g_file_test(dir, G_FILE_TEST_IS_DIR)) {
+ if(mkdir(dir, MODE) < 0) {
+ if (errno != EEXIST) {
+ g_free(dir);
+
+ err = -errno;
+ goto err;
+ }
+ }
+ }
+
+ g_free(dir);
+
+ name = g_strdup_printf("%s/%s/data", STORAGEDIR,
+ __connman_service_get_ident(service));
+ file->history_name = g_strdup_printf("%s/%s/history", STORAGEDIR,
+ __connman_service_get_ident(service));
+
+ /* TODO: Use a global config file instead of hard coded value. */
+ file->account_period_offset = 1;
+
+ err = stats_open(file, name);
+ g_free(name);
+ if (err < 0)
+ goto err;
+
+ err = stats_file_setup(file);
if (err < 0)
- g_hash_table_remove(stats_hash, service);
+ goto err;
+
+ return 0;
+
+err:
+ g_hash_table_remove(stats_hash, service);
return err;
}
next = get_next(file, get_end(file));
- if (next == get_begin(file))
- set_begin(file, get_next(file, next));
+ if (next == get_begin(file)) {
+ DBG("ring buffer is full, update history file");
+
+ if (stats_file_history_update(file) < 0) {
+ connman_warn("history file update failed %s",
+ file->history_name);
+ }
+ }
next->ts = time(NULL);
next->roaming = roaming;
projects / framework / connectivity / connman.git / blobdiff