int rm_rf(const char *path, RemoveFlags flags) { int fd, r; struct statfs s; assert(path); /* We refuse to clean the root file system with this * call. This is extra paranoia to never cause a really * seriously broken system. */ if (path_equal(path, "/")) { log_error("Attempted to remove entire root file system, and we can't allow that."); return -EPERM; } if ((flags & (REMOVE_SUBVOLUME|REMOVE_ROOT|REMOVE_PHYSICAL)) == (REMOVE_SUBVOLUME|REMOVE_ROOT|REMOVE_PHYSICAL)) { /* Try to remove as subvolume first */ r = btrfs_subvol_remove(path, BTRFS_REMOVE_RECURSIVE|BTRFS_REMOVE_QUOTA); if (r >= 0) return r; if (r != -ENOTTY && r != -EINVAL && r != -ENOTDIR) return r; /* Not btrfs or not a subvolume */ } fd = open(path, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW|O_NOATIME); if (fd < 0) { if (errno != ENOTDIR && errno != ELOOP) return -errno; if (!(flags & REMOVE_PHYSICAL)) { if (statfs(path, &s) < 0) return -errno; if (is_physical_fs(&s)) { log_error("Attempted to remove disk file system, and we can't allow that."); return -EPERM; } } if ((flags & REMOVE_ROOT) && !(flags & REMOVE_ONLY_DIRECTORIES)) if (unlink(path) < 0 && errno != ENOENT) return -errno; return 0; } r = rm_rf_children(fd, flags, NULL); if (flags & REMOVE_ROOT) { if (rmdir(path) < 0) { if (r == 0 && errno != ENOENT) r = -errno; } } return r; }
TarImport* tar_import_unref(TarImport *i) { if (!i) return NULL; if (i->tar_pid > 1) { (void) kill_and_sigcont(i->tar_pid, SIGKILL); (void) wait_for_terminate(i->tar_pid, NULL); } import_job_unref(i->tar_job); import_job_unref(i->checksum_job); import_job_unref(i->signature_job); curl_glue_unref(i->glue); sd_event_unref(i->event); if (i->temp_path) { (void) btrfs_subvol_remove(i->temp_path); (void) rm_rf_dangerous(i->temp_path, false, true, false); free(i->temp_path); } free(i->final_path); free(i->image_root); free(i->local); free(i); return NULL; }
TarExport *tar_export_unref(TarExport *e) { if (!e) return NULL; sd_event_source_unref(e->output_event_source); if (e->tar_pid > 1) { (void) kill_and_sigcont(e->tar_pid, SIGKILL); (void) wait_for_terminate(e->tar_pid, NULL); } if (e->temp_path) { (void) btrfs_subvol_remove(e->temp_path, BTRFS_REMOVE_QUOTA); free(e->temp_path); } import_compress_free(&e->compress); sd_event_unref(e->event); safe_close(e->tar_fd); free(e->buffer); free(e->path); free(e); return NULL; }
int main(int argc, char *argv[]) { BtrfsQuotaInfo quota; int r, fd; fd = open("/", O_RDONLY|O_CLOEXEC|O_DIRECTORY); if (fd < 0) log_error_errno(errno, "Failed to open root directory: %m"); else { char ts[FORMAT_TIMESTAMP_MAX], bs[FORMAT_BYTES_MAX]; BtrfsSubvolInfo info; r = btrfs_subvol_get_info_fd(fd, 0, &info); if (r < 0) log_error_errno(r, "Failed to get subvolume info: %m"); else { log_info("otime: %s", format_timestamp(ts, sizeof(ts), info.otime)); log_info("read-only (search): %s", yes_no(info.read_only)); } r = btrfs_qgroup_get_quota_fd(fd, 0, "a); if (r < 0) log_error_errno(r, "Failed to get quota info: %m"); else { log_info("referenced: %s", strna(format_bytes(bs, sizeof(bs), quota.referenced))); log_info("exclusive: %s", strna(format_bytes(bs, sizeof(bs), quota.exclusive))); log_info("referenced_max: %s", strna(format_bytes(bs, sizeof(bs), quota.referenced_max))); log_info("exclusive_max: %s", strna(format_bytes(bs, sizeof(bs), quota.exclusive_max))); } r = btrfs_subvol_get_read_only_fd(fd); if (r < 0) log_error_errno(r, "Failed to get read only flag: %m"); else log_info("read-only (ioctl): %s", yes_no(r)); safe_close(fd); } r = btrfs_subvol_make("/xxxtest"); if (r < 0) log_error_errno(r, "Failed to make subvolume: %m"); r = write_string_file("/xxxtest/afile", "ljsadhfljasdkfhlkjdsfha", WRITE_STRING_FILE_CREATE); if (r < 0) log_error_errno(r, "Failed to write file: %m"); r = btrfs_subvol_snapshot("/xxxtest", "/xxxtest2", 0); if (r < 0) log_error_errno(r, "Failed to make snapshot: %m"); r = btrfs_subvol_snapshot("/xxxtest", "/xxxtest3", BTRFS_SNAPSHOT_READ_ONLY); if (r < 0) log_error_errno(r, "Failed to make snapshot: %m"); r = btrfs_subvol_remove("/xxxtest", BTRFS_REMOVE_QUOTA); if (r < 0) log_error_errno(r, "Failed to remove subvolume: %m"); r = btrfs_subvol_remove("/xxxtest2", BTRFS_REMOVE_QUOTA); if (r < 0) log_error_errno(r, "Failed to remove subvolume: %m"); r = btrfs_subvol_remove("/xxxtest3", BTRFS_REMOVE_QUOTA); if (r < 0) log_error_errno(r, "Failed to remove subvolume: %m"); r = btrfs_subvol_snapshot("/etc", "/etc2", BTRFS_SNAPSHOT_READ_ONLY|BTRFS_SNAPSHOT_FALLBACK_COPY); if (r < 0) log_error_errno(r, "Failed to make snapshot: %m"); r = btrfs_subvol_remove("/etc2", BTRFS_REMOVE_QUOTA); if (r < 0) log_error_errno(r, "Failed to remove subvolume: %m"); r = btrfs_subvol_make("/xxxrectest"); if (r < 0) log_error_errno(r, "Failed to make subvolume: %m"); r = btrfs_subvol_make("/xxxrectest/xxxrectest2"); if (r < 0) log_error_errno(r, "Failed to make subvolume: %m"); r = btrfs_subvol_make("/xxxrectest/xxxrectest3"); if (r < 0) log_error_errno(r, "Failed to make subvolume: %m"); r = btrfs_subvol_make("/xxxrectest/xxxrectest3/sub"); if (r < 0) log_error_errno(r, "Failed to make subvolume: %m"); if (mkdir("/xxxrectest/dir", 0755) < 0) log_error_errno(errno, "Failed to make directory: %m"); r = btrfs_subvol_make("/xxxrectest/dir/xxxrectest4"); if (r < 0) log_error_errno(r, "Failed to make subvolume: %m"); if (mkdir("/xxxrectest/dir/xxxrectest4/dir", 0755) < 0) log_error_errno(errno, "Failed to make directory: %m"); r = btrfs_subvol_make("/xxxrectest/dir/xxxrectest4/dir/xxxrectest5"); if (r < 0) log_error_errno(r, "Failed to make subvolume: %m"); if (mkdir("/xxxrectest/mnt", 0755) < 0) log_error_errno(errno, "Failed to make directory: %m"); r = btrfs_subvol_snapshot("/xxxrectest", "/xxxrectest2", BTRFS_SNAPSHOT_RECURSIVE); if (r < 0) log_error_errno(r, "Failed to snapshot subvolume: %m"); r = btrfs_subvol_remove("/xxxrectest", BTRFS_REMOVE_QUOTA|BTRFS_REMOVE_RECURSIVE); if (r < 0) log_error_errno(r, "Failed to recursively remove subvolume: %m"); r = btrfs_subvol_remove("/xxxrectest2", BTRFS_REMOVE_QUOTA|BTRFS_REMOVE_RECURSIVE); if (r < 0) log_error_errno(r, "Failed to recursively remove subvolume: %m"); r = btrfs_subvol_make("/xxxquotatest"); if (r < 0) log_error_errno(r, "Failed to make subvolume: %m"); r = btrfs_subvol_auto_qgroup("/xxxquotatest", 0, true); if (r < 0) log_error_errno(r, "Failed to set up auto qgroup: %m"); r = btrfs_subvol_make("/xxxquotatest/beneath"); if (r < 0) log_error_errno(r, "Failed to make subvolume: %m"); r = btrfs_subvol_auto_qgroup("/xxxquotatest/beneath", 0, false); if (r < 0) log_error_errno(r, "Failed to set up auto qgroup: %m"); r = btrfs_qgroup_set_limit("/xxxquotatest/beneath", 0, 4ULL * 1024 * 1024 * 1024); if (r < 0) log_error_errno(r, "Failed to set up quota limit: %m"); r = btrfs_subvol_set_subtree_quota_limit("/xxxquotatest", 0, 5ULL * 1024 * 1024 * 1024); if (r < 0) log_error_errno(r, "Failed to set up quota limit: %m"); r = btrfs_subvol_snapshot("/xxxquotatest", "/xxxquotatest2", BTRFS_SNAPSHOT_RECURSIVE|BTRFS_SNAPSHOT_QUOTA); if (r < 0) log_error_errno(r, "Failed to setup snapshot: %m"); r = btrfs_qgroup_get_quota("/xxxquotatest2/beneath", 0, "a); if (r < 0) log_error_errno(r, "Failed to query quota: %m"); assert_se(quota.referenced_max == 4ULL * 1024 * 1024 * 1024); r = btrfs_subvol_get_subtree_quota("/xxxquotatest2", 0, "a); if (r < 0) log_error_errno(r, "Failed to query quota: %m"); assert_se(quota.referenced_max == 5ULL * 1024 * 1024 * 1024); r = btrfs_subvol_remove("/xxxquotatest", BTRFS_REMOVE_QUOTA|BTRFS_REMOVE_RECURSIVE); if (r < 0) log_error_errno(r, "Failed remove subvolume: %m"); r = btrfs_subvol_remove("/xxxquotatest2", BTRFS_REMOVE_QUOTA|BTRFS_REMOVE_RECURSIVE); if (r < 0) log_error_errno(r, "Failed remove subvolume: %m"); return 0; }
int main(int argc, char *argv[]) { int r; int fd; fd = open("/", O_RDONLY|O_CLOEXEC|O_DIRECTORY); if (fd < 0) log_error_errno(errno, "Failed to open root directory: %m"); else { BtrfsSubvolInfo info; BtrfsQuotaInfo quota; char ts[FORMAT_TIMESTAMP_MAX], bs[FORMAT_BYTES_MAX]; r = btrfs_subvol_get_info_fd(fd, &info); if (r < 0) log_error_errno(r, "Failed to get subvolume info: %m"); else { log_info("otime: %s", format_timestamp(ts, sizeof(ts), info.otime)); log_info("read-only (search): %s", yes_no(info.read_only)); } r = btrfs_subvol_get_quota_fd(fd, "a); if (r < 0) log_error_errno(r, "Failed to get quota info: %m"); else { log_info("referred: %s", strna(format_bytes(bs, sizeof(bs), quota.referred))); log_info("exclusive: %s", strna(format_bytes(bs, sizeof(bs), quota.exclusive))); log_info("referred_max: %s", strna(format_bytes(bs, sizeof(bs), quota.referred_max))); log_info("exclusive_max: %s", strna(format_bytes(bs, sizeof(bs), quota.exclusive_max))); } r = btrfs_subvol_get_read_only_fd(fd); if (r < 0) log_error_errno(r, "Failed to get read only flag: %m"); else log_info("read-only (ioctl): %s", yes_no(r)); safe_close(fd); } r = btrfs_subvol_make("/xxxtest"); if (r < 0) log_error_errno(r, "Failed to make subvolume: %m"); r = write_string_file("/xxxtest/afile", "ljsadhfljasdkfhlkjdsfha"); if (r < 0) log_error_errno(r, "Failed to write file: %m"); r = btrfs_subvol_snapshot("/xxxtest", "/xxxtest2", false, false); if (r < 0) log_error_errno(r, "Failed to make snapshot: %m"); r = btrfs_subvol_snapshot("/xxxtest", "/xxxtest3", true, false); if (r < 0) log_error_errno(r, "Failed to make snapshot: %m"); r = btrfs_subvol_remove("/xxxtest"); if (r < 0) log_error_errno(r, "Failed to remove subvolume: %m"); r = btrfs_subvol_remove("/xxxtest2"); if (r < 0) log_error_errno(r, "Failed to remove subvolume: %m"); r = btrfs_subvol_remove("/xxxtest3"); if (r < 0) log_error_errno(r, "Failed to remove subvolume: %m"); r = btrfs_subvol_snapshot("/etc", "/etc2", true, true); if (r < 0) log_error_errno(r, "Failed to make snapshot: %m"); r = btrfs_subvol_remove("/etc2"); if (r < 0) log_error_errno(r, "Failed to remove subvolume: %m"); return 0; }