#include "string.h"
#include "error.h"
#include "user.h"
+#include "bloom.h"
/* Id of the device containing the base dir. */
static dev_t device_id;
+static struct bloom *global_bloom_filter;
+static struct bloom *user_bloom_filter;
+
+static int consider_bloom(struct stat64 *s)
+{
+ if (!global_bloom_filter)
+ return 0;
+ if (s->st_nlink <= 1)
+ return 0;
+ return 1;
+}
+
+/** Data size to hash for the global bloom filter. */
+#define GLOBAL_BLOOM_BUF_SIZE (sizeof(ino_t) + sizeof(dev_t) + sizeof(off_t))
+/** For the user bloom filter also the uid is being hashed. */
+#define USER_BLOOM_BUF_SIZE (GLOBAL_BLOOM_BUF_SIZE + sizeof(uid_t))
+
+static void make_bloom_buf(struct stat64 *s, uint8_t buf[USER_BLOOM_BUF_SIZE])
+{
+ uint8_t *p = buf;
+
+ if (!consider_bloom(s))
+ return;
+ memcpy(p, &s->st_ino, sizeof(ino_t));
+ p += sizeof(ino_t);
+ memcpy(p, &s->st_dev, sizeof(dev_t));
+ p += sizeof(dev_t);
+ memcpy(p, &s->st_size, sizeof(off_t));
+ p += sizeof(off_t);
+ memcpy(p, &s->st_uid, sizeof(uid_t));
+}
+
+static int insert_global_bloom(struct stat64 *s,
+ uint8_t buf[USER_BLOOM_BUF_SIZE])
+{
+ if (!consider_bloom(s))
+ return 0;
+ return bloom_insert(buf, GLOBAL_BLOOM_BUF_SIZE, global_bloom_filter);
+}
+
+static int insert_user_bloom(struct stat64 *s,
+ uint8_t buf[USER_BLOOM_BUF_SIZE])
+{
+ if (!consider_bloom(s))
+ return 0;
+ return bloom_insert(buf, USER_BLOOM_BUF_SIZE, user_bloom_filter);
+}
static int add_directory(char *dirname, uint64_t *dir_num, uint64_t *parent_dir_num,
uint64_t *dir_size, uint64_t *dir_files)
}
static int update_user_row(struct osl_table *t, uint64_t dir_num,
- uint64_t *add)
+ uint64_t add)
{
struct osl_row *row;
struct osl_object obj = {.data = &dir_num, .size = sizeof(dir_num)};
objects[UT_DIR_NUM].data = &dir_num;
objects[UT_DIR_NUM].size = sizeof(dir_num);
- objects[UT_BYTES].data = add;
- objects[UT_BYTES].size = sizeof(*add);
+ objects[UT_BYTES].data = &add;
+ objects[UT_BYTES].size = sizeof(add);
objects[UT_FILES].data = &num_files;
objects[UT_FILES].size = sizeof(num_files);
ret = osl(osl_add_row(t, objects));
ret = osl(osl_get_object(t, row, UT_BYTES, &obj1));
if (ret < 0)
return ret;
- num = *(uint64_t *)obj1.data + *add;
+ num = *(uint64_t *)obj1.data + add;
ret = osl(osl_update_object(t, row, UT_BYTES, &obj2));
if (ret < 0)
return ret;
uint64_t dir_size = 0, dir_files = 0;
/* dir count. */
static uint64_t current_dir_num;
-
uint64_t this_dir_num = ++current_dir_num;
check_signals();
while ((entry = readdir(dir))) {
mode_t m;
struct stat64 s;
- uint32_t uid;
- uint64_t size;
struct user_info *ui;
+ uint8_t bloom_buf[USER_BLOOM_BUF_SIZE];
if (!strcmp(entry->d_name, "."))
continue;
if (S_ISDIR(m)) {
if (conf.one_file_system_given && s.st_dev != device_id)
continue;
- ret = create_user_table(s.st_uid, &ui);
+ dir_size += s.st_size;
+ dir_files++;
++ ret = create_user_table(conf.database_dir_arg, s.st_uid, &ui);
+ if (ret < 0)
+ goto out;
+ ret = update_user_row(ui->table, this_dir_num,
+ s.st_size);
+ if (ret < 0)
+ goto out;
ret = scan_dir(entry->d_name, &this_dir_num);
if (ret < 0)
goto out;
continue;
}
+
/* regular file */
- size = s.st_size;
- dir_size += size;
+ make_bloom_buf(&s, bloom_buf);
+ if (insert_global_bloom(&s, bloom_buf))
+ DEBUG_LOG("global hard link: %s/%s\n", dirname,
+ entry->d_name);
+ else
+ dir_size += s.st_size;
dir_files++;
- ret = create_user_table(s.st_uid, &ui);
- uid = s.st_uid;
- ret = create_user_table(conf.database_dir_arg, uid, &ui);
++ ret = create_user_table(conf.database_dir_arg, s.st_uid, &ui);
if (ret < 0)
goto out;
- ret = update_user_row(ui->table, this_dir_num, &size);
+ ret = insert_user_bloom(&s, bloom_buf);
+ if (ret)
+ DEBUG_LOG("hard link for uid %d: %s/%s\n",
+ (unsigned)s.st_uid, dirname, entry->d_name);
+ ret = update_user_row(ui->table, this_dir_num,
+ ret? 0 : s.st_size);
if (ret < 0)
goto out;
}
return ret;
}
+static void log_bloom_stat(struct bloom *b)
+{
+ unsigned percent;
+
+ NOTICE_LOG("\tfilter contains %llu entries\n",
+ (long long unsigned)b->num_entries);
+ percent = b->num_set_bits * 100ULL / (1ULL << b->order);
+ NOTICE_LOG("\t%u%% of bits are set\n", percent);
+ if (percent > 50) {
+ WARNING_LOG("results may be unreliable!\n");
+ WARNING_LOG("consider incrasing bllom filter size\n");
+ }
+}
+
+static void log_bloom_stats(void)
+{
+ struct bloom *b = global_bloom_filter;
+ if (!b)
+ return;
+ NOTICE_LOG("global bloom filter statistics:\n");
+ log_bloom_stat(b);
+ NOTICE_LOG("user bloom filter statistics:\n");
+ b = user_bloom_filter;
+ log_bloom_stat(b);
+}
+
/**
* The main function of the create mode.
*
int com_create(void)
{
uint64_t zero = 0ULL;
- int ret;
+ int ret, order = conf.bloom_filter_order_arg,
+ num = conf.num_bloom_filter_hash_functions_arg;
struct stat statbuf;
if (lstat(conf.base_dir_arg, &statbuf) == -1)
return -ERRNO_TO_ERROR(errno);
if (!S_ISDIR(statbuf.st_mode))
return -ERRNO_TO_ERROR(ENOTDIR);
+ if (order >= 10 && num > 0) {
+ global_bloom_filter = bloom_new(order, num);
+ user_bloom_filter = bloom_new(order, num);
+ } else
+ WARNING_LOG("hard link detection deactivated\n");
device_id = statbuf.st_dev;
create_hash_table(conf.hash_table_bits_arg);
ret = open_dir_table(1);
if (ret < 0)
- return ret;
+ goto out;
check_signals();
ret = scan_dir(conf.base_dir_arg, &zero);
if (ret < 0)
goto out;
- ret = write_uid_file();
+ ret = write_uid_file(conf.database_dir_arg);
+ log_bloom_stats();
out:
+ bloom_free(global_bloom_filter);
+ bloom_free(user_bloom_filter);
return ret;
}
projects / adu.git / commitdiff