int journal_directory_vacuum( const char *directory, uint64_t max_use, uint64_t n_max_files, usec_t max_retention_usec, usec_t *oldest_usec, bool verbose) { _cleanup_closedir_ DIR *d = NULL; struct vacuum_info *list = NULL; unsigned n_list = 0, i, n_active_files = 0; size_t n_allocated = 0; uint64_t sum = 0, freed = 0; usec_t retention_limit = 0; char sbytes[FORMAT_BYTES_MAX]; struct dirent *de; int r; assert(directory); if (max_use <= 0 && max_retention_usec <= 0 && n_max_files <= 0) return 0; if (max_retention_usec > 0) { retention_limit = now(CLOCK_REALTIME); if (retention_limit > max_retention_usec) retention_limit -= max_retention_usec; else max_retention_usec = retention_limit = 0; } d = opendir(directory); if (!d) return -errno; FOREACH_DIRENT_ALL(de, d, r = -errno; goto finish) { unsigned long long seqnum = 0, realtime; _cleanup_free_ char *p = NULL; sd_id128_t seqnum_id; bool have_seqnum; uint64_t size; struct stat st; size_t q; if (fstatat(dirfd(d), de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) { log_debug_errno(errno, "Failed to stat file %s while vacuuming, ignoring: %m", de->d_name); continue; } if (!S_ISREG(st.st_mode)) continue; q = strlen(de->d_name); if (endswith(de->d_name, ".journal")) { /* Vacuum archived files. Active files are * left around */ if (q < 1 + 32 + 1 + 16 + 1 + 16 + 8) { n_active_files++; continue; } if (de->d_name[q-8-16-1] != '-' || de->d_name[q-8-16-1-16-1] != '-' || de->d_name[q-8-16-1-16-1-32-1] != '@') { n_active_files++; continue; } p = strdup(de->d_name); if (!p) { r = -ENOMEM; goto finish; } de->d_name[q-8-16-1-16-1] = 0; if (sd_id128_from_string(de->d_name + q-8-16-1-16-1-32, &seqnum_id) < 0) { n_active_files++; continue; } if (sscanf(de->d_name + q-8-16-1-16, "%16llx-%16llx.journal", &seqnum, &realtime) != 2) { n_active_files++; continue; } have_seqnum = true; } else if (endswith(de->d_name, ".journal~")) { unsigned long long tmp; /* Vacuum corrupted files */ if (q < 1 + 16 + 1 + 16 + 8 + 1) { n_active_files ++; continue; } if (de->d_name[q-1-8-16-1] != '-' || de->d_name[q-1-8-16-1-16-1] != '@') { n_active_files ++; continue; } p = strdup(de->d_name); if (!p) { r = -ENOMEM; goto finish; } if (sscanf(de->d_name + q-1-8-16-1-16, "%16llx-%16llx.journal~", &realtime, &tmp) != 2) { n_active_files ++; continue; } have_seqnum = false; } else { /* We do not vacuum unknown files! */ log_debug("Not vacuuming unknown file %s.", de->d_name); continue; } size = 512UL * (uint64_t) st.st_blocks; r = journal_file_empty(dirfd(d), p); if (r < 0) { log_debug_errno(r, "Failed check if %s is empty, ignoring: %m", p); continue; } if (r > 0) { /* Always vacuum empty non-online files. */ if (unlinkat(dirfd(d), p, 0) >= 0) { log_full(verbose ? LOG_INFO : LOG_DEBUG, "Deleted empty archived journal %s/%s (%s).", directory, p, format_bytes(sbytes, sizeof(sbytes), size)); freed += size; } else if (errno != ENOENT) log_warning_errno(errno, "Failed to delete empty archived journal %s/%s: %m", directory, p); continue; } patch_realtime(dirfd(d), p, &st, &realtime); if (!GREEDY_REALLOC(list, n_allocated, n_list + 1)) { r = -ENOMEM; goto finish; } list[n_list].filename = p; list[n_list].usage = size; list[n_list].seqnum = seqnum; list[n_list].realtime = realtime; list[n_list].seqnum_id = seqnum_id; list[n_list].have_seqnum = have_seqnum; n_list ++; p = NULL; sum += size; } qsort_safe(list, n_list, sizeof(struct vacuum_info), vacuum_compare); for (i = 0; i < n_list; i++) { unsigned left; left = n_active_files + n_list - i; if ((max_retention_usec <= 0 || list[i].realtime >= retention_limit) && (max_use <= 0 || sum <= max_use) && (n_max_files <= 0 || left <= n_max_files)) break; if (unlinkat(dirfd(d), list[i].filename, 0) >= 0) { log_full(verbose ? LOG_INFO : LOG_DEBUG, "Deleted archived journal %s/%s (%s).", directory, list[i].filename, format_bytes(sbytes, sizeof(sbytes), list[i].usage)); freed += list[i].usage; if (list[i].usage < sum) sum -= list[i].usage; else sum = 0; } else if (errno != ENOENT) log_warning_errno(errno, "Failed to delete archived journal %s/%s: %m", directory, list[i].filename); } if (oldest_usec && i < n_list && (*oldest_usec == 0 || list[i].realtime < *oldest_usec)) *oldest_usec = list[i].realtime; r = 0; finish: for (i = 0; i < n_list; i++) free(list[i].filename); free(list); log_full(verbose ? LOG_INFO : LOG_DEBUG, "Vacuuming done, freed %s of archived journals on disk.", format_bytes(sbytes, sizeof(sbytes), freed)); return r; }
int journal_directory_vacuum( const char *directory, uint64_t max_use, usec_t max_retention_usec, usec_t *oldest_usec) { _cleanup_closedir_ DIR *d = NULL; int r = 0; struct vacuum_info *list = NULL; unsigned n_list = 0, i; size_t n_allocated = 0; uint64_t sum = 0, freed = 0; usec_t retention_limit = 0; assert(directory); if (max_use <= 0 && max_retention_usec <= 0) return 0; if (max_retention_usec > 0) { retention_limit = now(CLOCK_REALTIME); if (retention_limit > max_retention_usec) retention_limit -= max_retention_usec; else max_retention_usec = retention_limit = 0; } d = opendir(directory); if (!d) return -errno; for (;;) { struct dirent *de; size_t q; struct stat st; char *p; unsigned long long seqnum = 0, realtime; sd_id128_t seqnum_id; bool have_seqnum; errno = 0; de = readdir(d); if (!de && errno != 0) { r = -errno; goto finish; } if (!de) break; if (fstatat(dirfd(d), de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) continue; if (!S_ISREG(st.st_mode)) continue; q = strlen(de->d_name); if (endswith(de->d_name, ".journal")) { /* Vacuum archived files */ if (q < 1 + 32 + 1 + 16 + 1 + 16 + 8) continue; if (de->d_name[q-8-16-1] != '-' || de->d_name[q-8-16-1-16-1] != '-' || de->d_name[q-8-16-1-16-1-32-1] != '@') continue; p = strdup(de->d_name); if (!p) { r = -ENOMEM; goto finish; } de->d_name[q-8-16-1-16-1] = 0; if (sd_id128_from_string(de->d_name + q-8-16-1-16-1-32, &seqnum_id) < 0) { free(p); continue; } if (sscanf(de->d_name + q-8-16-1-16, "%16llx-%16llx.journal", &seqnum, &realtime) != 2) { free(p); continue; } have_seqnum = true; } else if (endswith(de->d_name, ".journal~")) { unsigned long long tmp; /* Vacuum corrupted files */ if (q < 1 + 16 + 1 + 16 + 8 + 1) continue; if (de->d_name[q-1-8-16-1] != '-' || de->d_name[q-1-8-16-1-16-1] != '@') continue; p = strdup(de->d_name); if (!p) { r = -ENOMEM; goto finish; } if (sscanf(de->d_name + q-1-8-16-1-16, "%16llx-%16llx.journal~", &realtime, &tmp) != 2) { free(p); continue; } have_seqnum = false; } else /* We do not vacuum active files or unknown files! */ continue; if (journal_file_empty(dirfd(d), p)) { /* Always vacuum empty non-online files. */ uint64_t size = 512UL * (uint64_t) st.st_blocks; if (unlinkat(dirfd(d), p, 0) >= 0) { log_info("Deleted empty journal %s/%s (%"PRIu64" bytes).", directory, p, size); freed += size; } else if (errno != ENOENT) log_warning("Failed to delete %s/%s: %m", directory, p); free(p); continue; } patch_realtime(directory, p, &st, &realtime); GREEDY_REALLOC(list, n_allocated, n_list + 1); list[n_list].filename = p; list[n_list].usage = 512UL * (uint64_t) st.st_blocks; list[n_list].seqnum = seqnum; list[n_list].realtime = realtime; list[n_list].seqnum_id = seqnum_id; list[n_list].have_seqnum = have_seqnum; sum += list[n_list].usage; n_list ++; } qsort_safe(list, n_list, sizeof(struct vacuum_info), vacuum_compare); for (i = 0; i < n_list; i++) { if ((max_retention_usec <= 0 || list[i].realtime >= retention_limit) && (max_use <= 0 || sum <= max_use)) break; if (unlinkat(dirfd(d), list[i].filename, 0) >= 0) { log_debug("Deleted archived journal %s/%s (%"PRIu64" bytes).", directory, list[i].filename, list[i].usage); freed += list[i].usage; if (list[i].usage < sum) sum -= list[i].usage; else sum = 0; } else if (errno != ENOENT) log_warning("Failed to delete %s/%s: %m", directory, list[i].filename); } if (oldest_usec && i < n_list && (*oldest_usec == 0 || list[i].realtime < *oldest_usec)) *oldest_usec = list[i].realtime; finish: for (i = 0; i < n_list; i++) free(list[i].filename); free(list); log_debug("Vacuuming done, freed %"PRIu64" bytes", freed); return r; }