From patchwork Mon Jul 18 11:34:38 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nikolay Borisov X-Patchwork-Id: 12921129 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id CCB1CC43334 for ; Mon, 18 Jul 2022 11:34:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234193AbiGRLer (ORCPT ); Mon, 18 Jul 2022 07:34:47 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55152 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233600AbiGRLeq (ORCPT ); Mon, 18 Jul 2022 07:34:46 -0400 Received: from smtp-out1.suse.de (smtp-out1.suse.de [IPv6:2001:67c:2178:6::1c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6B228E0E5 for ; Mon, 18 Jul 2022 04:34:43 -0700 (PDT) Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by smtp-out1.suse.de (Postfix) with ESMTPS id 22D3B33A5B; Mon, 18 Jul 2022 11:34:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1658144081; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=OqK1TovyY3xvuj+3Q2v++QDLRcDjEuouWHIjPNhUtpI=; b=HU+/ztOCCXB+a404UWfngt1KMaWaS9kXLzyC7PBqJKl7pXUaN+jQ7Q4EKPViqIgpKm/jvw sDRoR6dbyv9nhjo9DZoau+TooXXSYZt8kuFBfMhQ3GF4D708+KJepr073B67SOU/DGLUqX 9FXswmWV/4dHDQSPN34tEcJRPE3Ig0I= Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by imap2.suse-dmz.suse.de (Postfix) with ESMTPS id E356E13754; Mon, 18 Jul 2022 11:34:40 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id p1SqNFBF1WJsbAAAMHmgww (envelope-from ); Mon, 18 Jul 2022 11:34:40 +0000 From: Nikolay Borisov To: linux-btrfs@vger.kernel.org Cc: Nikolay Borisov Subject: [PATCH 1/2] btrfs-progs: factor out device stats printing code Date: Mon, 18 Jul 2022 14:34:38 +0300 Message-Id: <20220718113439.2997247-1-nborisov@suse.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org This is in preparation for introducing tabular output for device stats. Simply factor out string-specific output lines in a separate function. Signed-off-by: Nikolay Borisov Reviewed-by: Boris Burkov --- cmds/device.c | 141 +++++++++++++++++++++++++++----------------------- 1 file changed, 76 insertions(+), 65 deletions(-) -- 2.17.1 diff --git a/cmds/device.c b/cmds/device.c index 7d3febff96c2..feffe9184726 100644 --- a/cmds/device.c +++ b/cmds/device.c @@ -577,6 +577,71 @@ static const char * const cmd_device_stats_usage[] = { NULL }; +static int _print_device_stat_string(struct format_ctx *fctx, + struct btrfs_ioctl_get_dev_stats *args, char *path, bool check) +{ + char *canonical_path = path_canonicalize(path); + char devid_str[32]; + int j; + int err = 0; + static const struct { + const char name[32]; + enum btrfs_dev_stat_values stat_idx; + } dev_stats[] = { + { "write_io_errs", BTRFS_DEV_STAT_WRITE_ERRS }, + { "read_io_errs", BTRFS_DEV_STAT_READ_ERRS }, + { "flush_io_errs", BTRFS_DEV_STAT_FLUSH_ERRS }, + { "corruption_errs", BTRFS_DEV_STAT_CORRUPTION_ERRS }, + { "generation_errs", BTRFS_DEV_STAT_GENERATION_ERRS }, + }; + /* + * The plain text and json formats cannot be + * mapped directly in all cases and we have to switch + */ + const bool json = (bconf.output_format == CMD_FORMAT_JSON); + + /* No path when device is missing. */ + if (!canonical_path) { + canonical_path = malloc(32); + + if (!canonical_path) { + error("not enough memory for path buffer"); + return -ENOMEM; + } + + snprintf(canonical_path, 32, "devid:%llu", args->devid); + } + snprintf(devid_str, 32, "%llu", args->devid); + fmt_print_start_group(fctx, NULL, JSON_TYPE_MAP); + /* Plain text does not print device info */ + if (json) { + fmt_print(fctx, "device", canonical_path); + fmt_print(fctx, "devid", args->devid); + } + + for (j = 0; j < ARRAY_SIZE(dev_stats); j++) { + enum btrfs_dev_stat_values stat_idx = dev_stats[j].stat_idx; + /* We got fewer items than we know */ + if (args->nr_items < stat_idx + 1) + continue; + + /* Own format due to [/dev/name].value */ + if (json) { + fmt_print(fctx, dev_stats[j].name, args->values[stat_idx]); + } else { + printf("[%s].%-16s %llu\n", canonical_path, dev_stats[j].name, + (unsigned long long)args->values[stat_idx]); + } + if (check && (args->values[stat_idx] > 0)) + err |= 64; + } + + fmt_print_end_group(fctx, NULL); + free(canonical_path); + + return err; +} + static int cmd_device_stats(const struct cmd_struct *cmd, int argc, char **argv) { char *dev_path; @@ -586,7 +651,7 @@ static int cmd_device_stats(const struct cmd_struct *cmd, int argc, char **argv) int fdmnt; int i; int err = 0; - int check = 0; + bool check = false; __u64 flags = 0; DIR *dirstream = NULL; struct format_ctx fctx; @@ -606,7 +671,7 @@ static int cmd_device_stats(const struct cmd_struct *cmd, int argc, char **argv) switch (c) { case 'c': - check = 1; + check = true; break; case 'z': flags = BTRFS_DEV_STATS_RESET; @@ -656,70 +721,16 @@ static int cmd_device_stats(const struct cmd_struct *cmd, int argc, char **argv) error("device stats ioctl failed on %s: %m", path); err |= 1; - } else { - char *canonical_path; - char devid_str[32]; - int j; - static const struct { - const char name[32]; - u64 num; - } dev_stats[] = { - { "write_io_errs", BTRFS_DEV_STAT_WRITE_ERRS }, - { "read_io_errs", BTRFS_DEV_STAT_READ_ERRS }, - { "flush_io_errs", BTRFS_DEV_STAT_FLUSH_ERRS }, - { "corruption_errs", - BTRFS_DEV_STAT_CORRUPTION_ERRS }, - { "generation_errs", - BTRFS_DEV_STAT_GENERATION_ERRS }, - }; - /* - * The plain text and json formats cannot be - * mapped directly in all cases and we have to switch - */ - const bool json = (bconf.output_format == CMD_FORMAT_JSON); - - canonical_path = path_canonicalize(path); - - /* No path when device is missing. */ - if (!canonical_path) { - canonical_path = malloc(32); - if (!canonical_path) { - error("not enough memory for path buffer"); - goto out; - } - snprintf(canonical_path, 32, - "devid:%llu", args.devid); - } - snprintf(devid_str, 32, "%llu", args.devid); - fmt_print_start_group(&fctx, NULL, JSON_TYPE_MAP); - /* Plain text does not print device info */ - if (json) { - fmt_print(&fctx, "device", canonical_path); - fmt_print(&fctx, "devid", di_args[i].devid); - } + goto out; + } - for (j = 0; j < ARRAY_SIZE(dev_stats); j++) { - /* We got fewer items than we know */ - if (args.nr_items < dev_stats[j].num + 1) - continue; - - /* Own format due to [/dev/name].value */ - if (json) { - fmt_print(&fctx, dev_stats[j].name, - args.values[dev_stats[j].num]); - } else { - printf("[%s].%-16s %llu\n", - canonical_path, - dev_stats[j].name, - (unsigned long long) - args.values[dev_stats[j].num]); - } - if ((check == 1) - && (args.values[dev_stats[j].num] > 0)) - err |= 64; - } - fmt_print_end_group(&fctx, NULL); - free(canonical_path); + int err2 = _print_device_stat_string(&fctx, &args, path, check); + if (err2) { + if (err2 < 0) { + err = err2; + goto out; + } else + err |= err2; } }