From patchwork Thu Dec 14 22:21:06 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Song Liu X-Patchwork-Id: 178937 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a05:7300:3b04:b0:fb:cd0c:d3e with SMTP id c4csp8889344dys; Thu, 14 Dec 2023 14:22:52 -0800 (PST) X-Google-Smtp-Source: AGHT+IFIc6Ppa0SSy6bCofjOYK9MI8aVPyCSjYwWWzj1ImJXIvHdU5fDLYBTtFKTut1ALtmyVt5h X-Received: by 2002:a92:c24d:0:b0:35d:637e:c3d2 with SMTP id k13-20020a92c24d000000b0035d637ec3d2mr13568260ilo.20.1702592572596; Thu, 14 Dec 2023 14:22:52 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1702592572; cv=none; d=google.com; s=arc-20160816; b=pJ8a3p3f30uDrmoX6xOlc2UMABkuDLcoTExwN5GSrAwNp8/CIRFyb95zJLDac27e2s YcJmwTFNbOf24nWeGszeraXg3wyiYM5mdzzNUfihyqdeoBe/yD0KesakidAHdqA80gj8 vTAnimt61QXyvca8GST2ZTMaRkMjaZT/1Eiknu7zacHB/Ae718Jp2MURdyuM/dCFDUFD VdOmMaWY6+RTCIscSHqNrrkg7LiJAtBCks1ji9AyNTbDflCNV97bfiTMs+oJi2znTAVW zqA9S2C8cRBo3xfjJsDgRzAt6r+9T9M0EgkFo9J00I0m1mH/oYfoi39ASasdBUzj4Be6 BY5Q== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=content-transfer-encoding:mime-version:list-unsubscribe :list-subscribe:list-id:precedence:references:in-reply-to:message-id :date:subject:cc:to:from:dkim-signature; bh=td/XA1RL4P4hp3MX2NWFTbEhnClJPDdP8EqIVFnnncM=; fh=E0n8feb1VNuUejo3HZdccDt38wShMH/Hi8tGwaNYSoE=; b=vcJ+UQrf+NJ5sl0e+Dja8OBT2xgE2J+HDclqVMftaA6WuetClQs2tNumo7RDpiBBqM R5wjEcewkLYs2grrCn+KtmnxW5qupE+uW7KQMAUl2JrZijJ7hudQHDvOy4mFcA6pNkSb QkkYEHfxoKxp+Es4cCh5lkuJBytBLKMyJ7eusXzboAoh52dNTZcCAUniPB/Shpv50LzT HgDTfF1+6GWJ9a0PerdJwMxy/3dLQVhzUWyKscnUEt2X9Lb+FR32sjsoChAhtzY4Wbjm MhmvbSdiuzZP30tb/BsBb2jB2k3lh/dE+YydmYokpOk/pcdCoeWX+9FqEkxNns2WB/Os oRUQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@kernel.org header.s=k20201202 header.b=pZtCZvmd; spf=pass (google.com: domain of linux-kernel+bounces-184-ouuuleilei=gmail.com@vger.kernel.org designates 2604:1380:40f1:3f00::1 as permitted sender) smtp.mailfrom="linux-kernel+bounces-184-ouuuleilei=gmail.com@vger.kernel.org"; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: from sy.mirrors.kernel.org (sy.mirrors.kernel.org. [2604:1380:40f1:3f00::1]) by mx.google.com with ESMTPS id e24-20020a656898000000b005bdbedcaf61si11769081pgt.674.2023.12.14.14.22.52 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 14 Dec 2023 14:22:52 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel+bounces-184-ouuuleilei=gmail.com@vger.kernel.org designates 2604:1380:40f1:3f00::1 as permitted sender) client-ip=2604:1380:40f1:3f00::1; Authentication-Results: mx.google.com; dkim=pass header.i=@kernel.org header.s=k20201202 header.b=pZtCZvmd; spf=pass (google.com: domain of linux-kernel+bounces-184-ouuuleilei=gmail.com@vger.kernel.org designates 2604:1380:40f1:3f00::1 as permitted sender) smtp.mailfrom="linux-kernel+bounces-184-ouuuleilei=gmail.com@vger.kernel.org"; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: from smtp.subspace.kernel.org (wormhole.subspace.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by sy.mirrors.kernel.org (Postfix) with ESMTPS id 27682B21AEE for ; Thu, 14 Dec 2023 22:22:50 +0000 (UTC) Received: from localhost.localdomain (localhost.localdomain [127.0.0.1]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 5B13566AA6; Thu, 14 Dec 2023 22:22:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="pZtCZvmd" X-Original-To: linux-kernel@vger.kernel.org Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D07046720E; Thu, 14 Dec 2023 22:21:58 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id AC537C433C9; Thu, 14 Dec 2023 22:21:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1702592518; bh=D1SWee0qbMAuzH35ZwMpb5p/6OrM/Kgv+zE7T0NAfK0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=pZtCZvmdr3hHYFYqIMQRmMXckjg3cxpMz9WIqioAgPe8v6IeJAFr0kv6X4KfmtRqp 3WGxZbrgScKD0w7sF+RW3pgjfmDl1j3DHWKDmjxIKnO4M/E+7wGCj8U8m8R/bFhW54 ogOBzA3d1+uDsXJ96FW4kv5DT4ZXyH1s8YGsTIfO1tFL6/lhDEplmOyjEWbzU3Yroz O5g17NsoZElGkjWhwkgIbUlNJx69cj+r8UyJFXIXc7LBhJQ2QQSKlz+UzNAlZGoafm 9GOfIxJIWI81Srfr2QjmnOWz0iptd6+oM8KIKTKpScuK7Ek3Bt2IEg5RktQH0oP9j+ vkrK70GfkS/KA== From: Song Liu To: linux-raid@vger.kernel.org, linux-kernel@vger.kernel.org, linux-block@vger.kernel.org Cc: Song Liu , Christoph Hellwig , Jens Axboe , Neil Brown , Guoqing Jiang , Mateusz Grzonka , Jes Sorensen Subject: [PATCH 2/3] md: Remove deprecated CONFIG_MD_MULTIPATH Date: Thu, 14 Dec 2023 14:21:06 -0800 Message-Id: <20231214222107.2016042-3-song@kernel.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20231214222107.2016042-1-song@kernel.org> References: <20231214222107.2016042-1-song@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1785297709506046596 X-GMAIL-MSGID: 1785297709506046596 md-multipath has been marked as deprecated for 2.5 years. Remove it. Cc: Christoph Hellwig Cc: Jens Axboe Cc: Neil Brown Cc: Guoqing Jiang Cc: Mateusz Grzonka Cc: Jes Sorensen Signed-off-by: Song Liu Reviewed-by: Christoph Hellwig Reviewed-by: Hannes Reinecke --- drivers/md/Kconfig | 11 - drivers/md/Makefile | 2 - drivers/md/md-multipath.c | 463 --------------------------------- drivers/md/md.c | 185 ++++++------- include/uapi/linux/raid/md_p.h | 2 +- include/uapi/linux/raid/md_u.h | 1 - 6 files changed, 81 insertions(+), 583 deletions(-) delete mode 100644 drivers/md/md-multipath.c diff --git a/drivers/md/Kconfig b/drivers/md/Kconfig index 0c721e0e5921..de4f47fe5a03 100644 --- a/drivers/md/Kconfig +++ b/drivers/md/Kconfig @@ -159,17 +159,6 @@ config MD_RAID456 If unsure, say Y. -config MD_MULTIPATH - tristate "Multipath I/O support (deprecated)" - depends on BLK_DEV_MD - help - MD_MULTIPATH provides a simple multi-path personality for use - the MD framework. It is not under active development. New - projects should consider using DM_MULTIPATH which has more - features and more testing. - - If unsure, say N. - config MD_FAULTY tristate "Faulty test module for MD (deprecated)" depends on BLK_DEV_MD diff --git a/drivers/md/Makefile b/drivers/md/Makefile index c72f76cf7b63..6287c73399e7 100644 --- a/drivers/md/Makefile +++ b/drivers/md/Makefile @@ -29,7 +29,6 @@ dm-zoned-y += dm-zoned-target.o dm-zoned-metadata.o dm-zoned-reclaim.o md-mod-y += md.o md-bitmap.o raid456-y += raid5.o raid5-cache.o raid5-ppl.o -multipath-y += md-multipath.o faulty-y += md-faulty.o # Note: link order is important. All raid personalities @@ -41,7 +40,6 @@ obj-$(CONFIG_MD_RAID0) += raid0.o obj-$(CONFIG_MD_RAID1) += raid1.o obj-$(CONFIG_MD_RAID10) += raid10.o obj-$(CONFIG_MD_RAID456) += raid456.o -obj-$(CONFIG_MD_MULTIPATH) += multipath.o obj-$(CONFIG_MD_FAULTY) += faulty.o obj-$(CONFIG_MD_CLUSTER) += md-cluster.o obj-$(CONFIG_BCACHE) += bcache/ diff --git a/drivers/md/md-multipath.c b/drivers/md/md-multipath.c deleted file mode 100644 index 19c8625ea642..000000000000 --- a/drivers/md/md-multipath.c +++ /dev/null @@ -1,463 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-or-later -/* - * multipath.c : Multiple Devices driver for Linux - * - * Copyright (C) 1999, 2000, 2001 Ingo Molnar, Red Hat - * - * Copyright (C) 1996, 1997, 1998 Ingo Molnar, Miguel de Icaza, Gadi Oxman - * - * MULTIPATH management functions. - * - * derived from raid1.c. - */ - -#include -#include -#include -#include -#include -#include "md.h" -#include "md-multipath.h" - -#define MAX_WORK_PER_DISK 128 - -#define NR_RESERVED_BUFS 32 - -static int multipath_map (struct mpconf *conf) -{ - int i, disks = conf->raid_disks; - - /* - * Later we do read balancing on the read side - * now we use the first available disk. - */ - - for (i = 0; i < disks; i++) { - struct md_rdev *rdev = conf->multipaths[i].rdev; - - if (rdev && test_bit(In_sync, &rdev->flags) && - !test_bit(Faulty, &rdev->flags)) { - atomic_inc(&rdev->nr_pending); - return i; - } - } - - pr_crit_ratelimited("multipath_map(): no more operational IO paths?\n"); - return (-1); -} - -static void multipath_reschedule_retry (struct multipath_bh *mp_bh) -{ - unsigned long flags; - struct mddev *mddev = mp_bh->mddev; - struct mpconf *conf = mddev->private; - - spin_lock_irqsave(&conf->device_lock, flags); - list_add(&mp_bh->retry_list, &conf->retry_list); - spin_unlock_irqrestore(&conf->device_lock, flags); - md_wakeup_thread(mddev->thread); -} - -/* - * multipath_end_bh_io() is called when we have finished servicing a multipathed - * operation and are ready to return a success/failure code to the buffer - * cache layer. - */ -static void multipath_end_bh_io(struct multipath_bh *mp_bh, blk_status_t status) -{ - struct bio *bio = mp_bh->master_bio; - struct mpconf *conf = mp_bh->mddev->private; - - bio->bi_status = status; - bio_endio(bio); - mempool_free(mp_bh, &conf->pool); -} - -static void multipath_end_request(struct bio *bio) -{ - struct multipath_bh *mp_bh = bio->bi_private; - struct mpconf *conf = mp_bh->mddev->private; - struct md_rdev *rdev = conf->multipaths[mp_bh->path].rdev; - - if (!bio->bi_status) - multipath_end_bh_io(mp_bh, 0); - else if (!(bio->bi_opf & REQ_RAHEAD)) { - /* - * oops, IO error: - */ - md_error (mp_bh->mddev, rdev); - pr_info("multipath: %pg: rescheduling sector %llu\n", - rdev->bdev, - (unsigned long long)bio->bi_iter.bi_sector); - multipath_reschedule_retry(mp_bh); - } else - multipath_end_bh_io(mp_bh, bio->bi_status); - rdev_dec_pending(rdev, conf->mddev); -} - -static bool multipath_make_request(struct mddev *mddev, struct bio * bio) -{ - struct mpconf *conf = mddev->private; - struct multipath_bh * mp_bh; - struct multipath_info *multipath; - - if (unlikely(bio->bi_opf & REQ_PREFLUSH) - && md_flush_request(mddev, bio)) - return true; - - md_account_bio(mddev, &bio); - mp_bh = mempool_alloc(&conf->pool, GFP_NOIO); - - mp_bh->master_bio = bio; - mp_bh->mddev = mddev; - - mp_bh->path = multipath_map(conf); - if (mp_bh->path < 0) { - bio_io_error(bio); - mempool_free(mp_bh, &conf->pool); - return true; - } - multipath = conf->multipaths + mp_bh->path; - - bio_init_clone(multipath->rdev->bdev, &mp_bh->bio, bio, GFP_NOIO); - - mp_bh->bio.bi_iter.bi_sector += multipath->rdev->data_offset; - mp_bh->bio.bi_opf |= REQ_FAILFAST_TRANSPORT; - mp_bh->bio.bi_end_io = multipath_end_request; - mp_bh->bio.bi_private = mp_bh; - mddev_check_write_zeroes(mddev, &mp_bh->bio); - submit_bio_noacct(&mp_bh->bio); - return true; -} - -static void multipath_status(struct seq_file *seq, struct mddev *mddev) -{ - struct mpconf *conf = mddev->private; - int i; - - lockdep_assert_held(&mddev->lock); - - seq_printf (seq, " [%d/%d] [", conf->raid_disks, - conf->raid_disks - mddev->degraded); - for (i = 0; i < conf->raid_disks; i++) { - struct md_rdev *rdev = READ_ONCE(conf->multipaths[i].rdev); - - seq_printf(seq, "%s", - rdev && test_bit(In_sync, &rdev->flags) ? "U" : "_"); - } - seq_putc(seq, ']'); -} - -/* - * Careful, this can execute in IRQ contexts as well! - */ -static void multipath_error (struct mddev *mddev, struct md_rdev *rdev) -{ - struct mpconf *conf = mddev->private; - - if (conf->raid_disks - mddev->degraded <= 1) { - /* - * Uh oh, we can do nothing if this is our last path, but - * first check if this is a queued request for a device - * which has just failed. - */ - pr_warn("multipath: only one IO path left and IO error.\n"); - /* leave it active... it's all we have */ - return; - } - /* - * Mark disk as unusable - */ - if (test_and_clear_bit(In_sync, &rdev->flags)) { - unsigned long flags; - spin_lock_irqsave(&conf->device_lock, flags); - mddev->degraded++; - spin_unlock_irqrestore(&conf->device_lock, flags); - } - set_bit(Faulty, &rdev->flags); - set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags); - pr_err("multipath: IO failure on %pg, disabling IO path.\n" - "multipath: Operation continuing on %d IO paths.\n", - rdev->bdev, - conf->raid_disks - mddev->degraded); -} - -static void print_multipath_conf(struct mpconf *conf) -{ - int i; - struct multipath_info *tmp; - - pr_debug("MULTIPATH conf printout:\n"); - if (!conf) { - pr_debug("(conf==NULL)\n"); - return; - } - pr_debug(" --- wd:%d rd:%d\n", conf->raid_disks - conf->mddev->degraded, - conf->raid_disks); - - lockdep_assert_held(&conf->mddev->reconfig_mutex); - for (i = 0; i < conf->raid_disks; i++) { - tmp = conf->multipaths + i; - if (tmp->rdev) - pr_debug(" disk%d, o:%d, dev:%pg\n", - i,!test_bit(Faulty, &tmp->rdev->flags), - tmp->rdev->bdev); - } -} - -static int multipath_add_disk(struct mddev *mddev, struct md_rdev *rdev) -{ - struct mpconf *conf = mddev->private; - int err = -EEXIST; - int path; - struct multipath_info *p; - int first = 0; - int last = mddev->raid_disks - 1; - - if (rdev->raid_disk >= 0) - first = last = rdev->raid_disk; - - print_multipath_conf(conf); - - for (path = first; path <= last; path++) - if ((p=conf->multipaths+path)->rdev == NULL) { - disk_stack_limits(mddev->gendisk, rdev->bdev, - rdev->data_offset << 9); - - err = md_integrity_add_rdev(rdev, mddev); - if (err) - break; - spin_lock_irq(&conf->device_lock); - mddev->degraded--; - rdev->raid_disk = path; - set_bit(In_sync, &rdev->flags); - spin_unlock_irq(&conf->device_lock); - WRITE_ONCE(p->rdev, rdev); - err = 0; - break; - } - - print_multipath_conf(conf); - - return err; -} - -static int multipath_remove_disk(struct mddev *mddev, struct md_rdev *rdev) -{ - struct mpconf *conf = mddev->private; - int err = 0; - int number = rdev->raid_disk; - struct multipath_info *p = conf->multipaths + number; - - print_multipath_conf(conf); - - if (rdev == p->rdev) { - if (test_bit(In_sync, &rdev->flags) || - atomic_read(&rdev->nr_pending)) { - pr_warn("hot-remove-disk, slot %d is identified but is still operational!\n", number); - err = -EBUSY; - goto abort; - } - WRITE_ONCE(p->rdev, NULL); - err = md_integrity_register(mddev); - } -abort: - - print_multipath_conf(conf); - return err; -} - -/* - * This is a kernel thread which: - * - * 1. Retries failed read operations on working multipaths. - * 2. Updates the raid superblock when problems encounter. - * 3. Performs writes following reads for array syncronising. - */ - -static void multipathd(struct md_thread *thread) -{ - struct mddev *mddev = thread->mddev; - struct multipath_bh *mp_bh; - struct bio *bio; - unsigned long flags; - struct mpconf *conf = mddev->private; - struct list_head *head = &conf->retry_list; - - md_check_recovery(mddev); - for (;;) { - spin_lock_irqsave(&conf->device_lock, flags); - if (list_empty(head)) - break; - mp_bh = list_entry(head->prev, struct multipath_bh, retry_list); - list_del(head->prev); - spin_unlock_irqrestore(&conf->device_lock, flags); - - bio = &mp_bh->bio; - bio->bi_iter.bi_sector = mp_bh->master_bio->bi_iter.bi_sector; - - if ((mp_bh->path = multipath_map (conf))<0) { - pr_err("multipath: %pg: unrecoverable IO read error for block %llu\n", - bio->bi_bdev, - (unsigned long long)bio->bi_iter.bi_sector); - multipath_end_bh_io(mp_bh, BLK_STS_IOERR); - } else { - pr_err("multipath: %pg: redirecting sector %llu to another IO path\n", - bio->bi_bdev, - (unsigned long long)bio->bi_iter.bi_sector); - *bio = *(mp_bh->master_bio); - bio->bi_iter.bi_sector += - conf->multipaths[mp_bh->path].rdev->data_offset; - bio_set_dev(bio, conf->multipaths[mp_bh->path].rdev->bdev); - bio->bi_opf |= REQ_FAILFAST_TRANSPORT; - bio->bi_end_io = multipath_end_request; - bio->bi_private = mp_bh; - submit_bio_noacct(bio); - } - } - spin_unlock_irqrestore(&conf->device_lock, flags); -} - -static sector_t multipath_size(struct mddev *mddev, sector_t sectors, int raid_disks) -{ - WARN_ONCE(sectors || raid_disks, - "%s does not support generic reshape\n", __func__); - - return mddev->dev_sectors; -} - -static int multipath_run (struct mddev *mddev) -{ - struct mpconf *conf; - int disk_idx; - struct multipath_info *disk; - struct md_rdev *rdev; - int working_disks; - int ret; - - if (md_check_no_bitmap(mddev)) - return -EINVAL; - - if (mddev->level != LEVEL_MULTIPATH) { - pr_warn("multipath: %s: raid level not set to multipath IO (%d)\n", - mdname(mddev), mddev->level); - goto out; - } - /* - * copy the already verified devices into our private MULTIPATH - * bookkeeping area. [whatever we allocate in multipath_run(), - * should be freed in multipath_free()] - */ - - conf = kzalloc(sizeof(struct mpconf), GFP_KERNEL); - mddev->private = conf; - if (!conf) - goto out; - - conf->multipaths = kcalloc(mddev->raid_disks, - sizeof(struct multipath_info), - GFP_KERNEL); - if (!conf->multipaths) - goto out_free_conf; - - working_disks = 0; - rdev_for_each(rdev, mddev) { - disk_idx = rdev->raid_disk; - if (disk_idx < 0 || - disk_idx >= mddev->raid_disks) - continue; - - disk = conf->multipaths + disk_idx; - disk->rdev = rdev; - disk_stack_limits(mddev->gendisk, rdev->bdev, - rdev->data_offset << 9); - - if (!test_bit(Faulty, &rdev->flags)) - working_disks++; - } - - conf->raid_disks = mddev->raid_disks; - conf->mddev = mddev; - spin_lock_init(&conf->device_lock); - INIT_LIST_HEAD(&conf->retry_list); - - if (!working_disks) { - pr_warn("multipath: no operational IO paths for %s\n", - mdname(mddev)); - goto out_free_conf; - } - mddev->degraded = conf->raid_disks - working_disks; - - ret = mempool_init_kmalloc_pool(&conf->pool, NR_RESERVED_BUFS, - sizeof(struct multipath_bh)); - if (ret) - goto out_free_conf; - - rcu_assign_pointer(mddev->thread, - md_register_thread(multipathd, mddev, "multipath")); - if (!mddev->thread) - goto out_free_conf; - - pr_info("multipath: array %s active with %d out of %d IO paths\n", - mdname(mddev), conf->raid_disks - mddev->degraded, - mddev->raid_disks); - /* - * Ok, everything is just fine now - */ - md_set_array_sectors(mddev, multipath_size(mddev, 0, 0)); - - if (md_integrity_register(mddev)) - goto out_free_conf; - - return 0; - -out_free_conf: - mempool_exit(&conf->pool); - kfree(conf->multipaths); - kfree(conf); - mddev->private = NULL; -out: - return -EIO; -} - -static void multipath_free(struct mddev *mddev, void *priv) -{ - struct mpconf *conf = priv; - - mempool_exit(&conf->pool); - kfree(conf->multipaths); - kfree(conf); -} - -static struct md_personality multipath_personality = -{ - .name = "multipath", - .level = LEVEL_MULTIPATH, - .owner = THIS_MODULE, - .make_request = multipath_make_request, - .run = multipath_run, - .free = multipath_free, - .status = multipath_status, - .error_handler = multipath_error, - .hot_add_disk = multipath_add_disk, - .hot_remove_disk= multipath_remove_disk, - .size = multipath_size, -}; - -static int __init multipath_init (void) -{ - return register_md_personality (&multipath_personality); -} - -static void __exit multipath_exit (void) -{ - unregister_md_personality (&multipath_personality); -} - -module_init(multipath_init); -module_exit(multipath_exit); -MODULE_LICENSE("GPL"); -MODULE_DESCRIPTION("simple multi-path personality for MD (deprecated)"); -MODULE_ALIAS("md-personality-7"); /* MULTIPATH */ -MODULE_ALIAS("md-multipath"); -MODULE_ALIAS("md-level--4"); diff --git a/drivers/md/md.c b/drivers/md/md.c index 8649b63cd93b..7b5e6dd67dab 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -1286,17 +1286,11 @@ static int super_90_load(struct md_rdev *rdev, struct md_rdev *refdev, int minor rdev->sb_size = MD_SB_BYTES; rdev->badblocks.shift = -1; - if (sb->level == LEVEL_MULTIPATH) - rdev->desc_nr = -1; - else - rdev->desc_nr = sb->this_disk.number; - - /* not spare disk, or LEVEL_MULTIPATH */ - if (sb->level == LEVEL_MULTIPATH || - (rdev->desc_nr >= 0 && - rdev->desc_nr < MD_SB_DISKS && - sb->disks[rdev->desc_nr].state & - ((1<desc_nr = sb->this_disk.number; + + /* not spare disk */ + if (rdev->desc_nr >= 0 && rdev->desc_nr < MD_SB_DISKS && + sb->disks[rdev->desc_nr].state & ((1<level != LEVEL_MULTIPATH) { - desc = sb->disks + rdev->desc_nr; + desc = sb->disks + rdev->desc_nr; - if (desc->state & (1<flags); - else if (desc->state & (1<raid_disk < mddev->raid_disks */) { - set_bit(In_sync, &rdev->flags); + if (desc->state & (1<flags); + else if (desc->state & (1<flags); + rdev->raid_disk = desc->raid_disk; + rdev->saved_raid_disk = desc->raid_disk; + } else if (desc->state & (1<minor_version >= 91) { + rdev->recovery_offset = 0; rdev->raid_disk = desc->raid_disk; - rdev->saved_raid_disk = desc->raid_disk; - } else if (desc->state & (1<minor_version >= 91) { - rdev->recovery_offset = 0; - rdev->raid_disk = desc->raid_disk; - } } - if (desc->state & (1<flags); - if (desc->state & (1<flags); - } else /* MULTIPATH are always insync */ - set_bit(In_sync, &rdev->flags); + } + if (desc->state & (1<flags); + if (desc->state & (1<flags); return 0; } @@ -1756,10 +1747,7 @@ static int super_1_load(struct md_rdev *rdev, struct md_rdev *refdev, int minor_ && rdev->new_data_offset < sb_start + (rdev->sb_size/512)) return -EINVAL; - if (sb->level == cpu_to_le32(LEVEL_MULTIPATH)) - rdev->desc_nr = -1; - else - rdev->desc_nr = le32_to_cpu(sb->dev_number); + rdev->desc_nr = le32_to_cpu(sb->dev_number); if (!rdev->bb_page) { rdev->bb_page = alloc_page(GFP_KERNEL); @@ -1812,12 +1800,10 @@ static int super_1_load(struct md_rdev *rdev, struct md_rdev *refdev, int minor_ sb->level != 0) return -EINVAL; - /* not spare disk, or LEVEL_MULTIPATH */ - if (sb->level == cpu_to_le32(LEVEL_MULTIPATH) || - (rdev->desc_nr >= 0 && - rdev->desc_nr < le32_to_cpu(sb->max_dev) && - (le16_to_cpu(sb->dev_roles[rdev->desc_nr]) < MD_DISK_ROLE_MAX || - le16_to_cpu(sb->dev_roles[rdev->desc_nr]) == MD_DISK_ROLE_JOURNAL))) + /* not spare disk */ + if (rdev->desc_nr >= 0 && rdev->desc_nr < le32_to_cpu(sb->max_dev) && + (le16_to_cpu(sb->dev_roles[rdev->desc_nr]) < MD_DISK_ROLE_MAX || + le16_to_cpu(sb->dev_roles[rdev->desc_nr]) == MD_DISK_ROLE_JOURNAL)) spare_disk = false; if (!refdev) { @@ -1860,6 +1846,7 @@ static int super_1_validate(struct mddev *mddev, struct md_rdev *rdev) { struct mdp_superblock_1 *sb = page_address(rdev->sb_page); __u64 ev1 = le64_to_cpu(sb->events); + int role; rdev->raid_disk = -1; clear_bit(Faulty, &rdev->flags); @@ -1973,58 +1960,55 @@ static int super_1_validate(struct mddev *mddev, struct md_rdev *rdev) /* just a hot-add of a new device, leave raid_disk at -1 */ return 0; } - if (mddev->level != LEVEL_MULTIPATH) { - int role; - if (rdev->desc_nr < 0 || - rdev->desc_nr >= le32_to_cpu(sb->max_dev)) { - role = MD_DISK_ROLE_SPARE; - rdev->desc_nr = -1; - } else - role = le16_to_cpu(sb->dev_roles[rdev->desc_nr]); - switch(role) { - case MD_DISK_ROLE_SPARE: /* spare */ - break; - case MD_DISK_ROLE_FAULTY: /* faulty */ - set_bit(Faulty, &rdev->flags); - break; - case MD_DISK_ROLE_JOURNAL: /* journal device */ - if (!(le32_to_cpu(sb->feature_map) & MD_FEATURE_JOURNAL)) { - /* journal device without journal feature */ - pr_warn("md: journal device provided without journal feature, ignoring the device\n"); - return -EINVAL; - } - set_bit(Journal, &rdev->flags); - rdev->journal_tail = le64_to_cpu(sb->journal_tail); - rdev->raid_disk = 0; - break; - default: - rdev->saved_raid_disk = role; - if ((le32_to_cpu(sb->feature_map) & - MD_FEATURE_RECOVERY_OFFSET)) { - rdev->recovery_offset = le64_to_cpu(sb->recovery_offset); - if (!(le32_to_cpu(sb->feature_map) & - MD_FEATURE_RECOVERY_BITMAP)) - rdev->saved_raid_disk = -1; - } else { - /* - * If the array is FROZEN, then the device can't - * be in_sync with rest of array. - */ - if (!test_bit(MD_RECOVERY_FROZEN, - &mddev->recovery)) - set_bit(In_sync, &rdev->flags); - } - rdev->raid_disk = role; - break; + + if (rdev->desc_nr < 0 || + rdev->desc_nr >= le32_to_cpu(sb->max_dev)) { + role = MD_DISK_ROLE_SPARE; + rdev->desc_nr = -1; + } else + role = le16_to_cpu(sb->dev_roles[rdev->desc_nr]); + switch (role) { + case MD_DISK_ROLE_SPARE: /* spare */ + break; + case MD_DISK_ROLE_FAULTY: /* faulty */ + set_bit(Faulty, &rdev->flags); + break; + case MD_DISK_ROLE_JOURNAL: /* journal device */ + if (!(le32_to_cpu(sb->feature_map) & MD_FEATURE_JOURNAL)) { + /* journal device without journal feature */ + pr_warn("md: journal device provided without journal feature, ignoring the device\n"); + return -EINVAL; } - if (sb->devflags & WriteMostly1) - set_bit(WriteMostly, &rdev->flags); - if (sb->devflags & FailFast1) - set_bit(FailFast, &rdev->flags); - if (le32_to_cpu(sb->feature_map) & MD_FEATURE_REPLACEMENT) - set_bit(Replacement, &rdev->flags); - } else /* MULTIPATH are always insync */ - set_bit(In_sync, &rdev->flags); + set_bit(Journal, &rdev->flags); + rdev->journal_tail = le64_to_cpu(sb->journal_tail); + rdev->raid_disk = 0; + break; + default: + rdev->saved_raid_disk = role; + if ((le32_to_cpu(sb->feature_map) & + MD_FEATURE_RECOVERY_OFFSET)) { + rdev->recovery_offset = le64_to_cpu(sb->recovery_offset); + if (!(le32_to_cpu(sb->feature_map) & + MD_FEATURE_RECOVERY_BITMAP)) + rdev->saved_raid_disk = -1; + } else { + /* + * If the array is FROZEN, then the device can't + * be in_sync with rest of array. + */ + if (!test_bit(MD_RECOVERY_FROZEN, + &mddev->recovery)) + set_bit(In_sync, &rdev->flags); + } + rdev->raid_disk = role; + break; + } + if (sb->devflags & WriteMostly1) + set_bit(WriteMostly, &rdev->flags); + if (sb->devflags & FailFast1) + set_bit(FailFast, &rdev->flags); + if (le32_to_cpu(sb->feature_map) & MD_FEATURE_REPLACEMENT) + set_bit(Replacement, &rdev->flags); return 0; } @@ -2842,10 +2826,6 @@ void md_update_sb(struct mddev *mddev, int force_change) } else pr_debug("md: %pg (skipping faulty)\n", rdev->bdev); - - if (mddev->level == LEVEL_MULTIPATH) - /* only need to write one superblock... */ - break; } if (md_super_wait(mddev) < 0) goto rewrite; @@ -3846,13 +3826,8 @@ static int analyze_sbs(struct mddev *mddev) continue; } } - if (mddev->level == LEVEL_MULTIPATH) { - rdev->desc_nr = i++; - rdev->raid_disk = rdev->desc_nr; - set_bit(In_sync, &rdev->flags); - } else if (rdev->raid_disk >= - (mddev->raid_disks - min(0, mddev->delta_disks)) && - !test_bit(Journal, &rdev->flags)) { + if (rdev->raid_disk >= (mddev->raid_disks - min(0, mddev->delta_disks)) && + !test_bit(Journal, &rdev->flags)) { rdev->raid_disk = -1; clear_bit(In_sync, &rdev->flags); } diff --git a/include/uapi/linux/raid/md_p.h b/include/uapi/linux/raid/md_p.h index b36e282a413d..5a43c23f53bf 100644 --- a/include/uapi/linux/raid/md_p.h +++ b/include/uapi/linux/raid/md_p.h @@ -233,7 +233,7 @@ struct mdp_superblock_1 { char set_name[32]; /* set and interpreted by user-space */ __le64 ctime; /* lo 40 bits are seconds, top 24 are microseconds or 0*/ - __le32 level; /* -4 (multipath), 0,1,4,5 */ + __le32 level; /* 0,1,4,5 */ __le32 layout; /* only for raid5 and raid10 currently */ __le64 size; /* used size of component devices, in 512byte sectors */ diff --git a/include/uapi/linux/raid/md_u.h b/include/uapi/linux/raid/md_u.h index c285f76e5d8d..b44bbc356643 100644 --- a/include/uapi/linux/raid/md_u.h +++ b/include/uapi/linux/raid/md_u.h @@ -104,7 +104,6 @@ typedef struct mdu_array_info_s { } mdu_array_info_t; /* non-obvious values for 'level' */ -#define LEVEL_MULTIPATH (-4) #define LEVEL_FAULTY (-5) /* we need a value for 'no level specified' and 0