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From: Naohiro Aota <naohiro.aota@wdc.com>
To: linux-btrfs@vger.kernel.org, David Sterba <dsterba@suse.com>
Cc: Chris Mason <clm@fb.com>, Josef Bacik <josef@toxicpanda.com>,
	Nikolay Borisov <nborisov@suse.com>,
	Damien Le Moal <damien.lemoal@wdc.com>,
	Matias Bjorling <Matias.Bjorling@wdc.com>,
	Johannes Thumshirn <jthumshirn@suse.de>,
	Hannes Reinecke <hare@suse.com>,
	Anand Jain <anand.jain@oracle.com>,
	linux-fsdevel@vger.kernel.org,
	Naohiro Aota <naohiro.aota@wdc.com>
Subject: [PATCH v4 14/27] btrfs: limit super block locations in HMZONED mode
Date: Fri, 23 Aug 2019 19:10:23 +0900	[thread overview]
Message-ID: <20190823101036.796932-15-naohiro.aota@wdc.com> (raw)
In-Reply-To: <20190823101036.796932-1-naohiro.aota@wdc.com>

When in HMZONED mode, make sure that device super blocks are located in
randomly writable zones of zoned block devices. That is, do not write super
blocks in sequential write required zones of host-managed zoned block
devices as update would not be possible.

Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
---
 fs/btrfs/disk-io.c     |  4 ++++
 fs/btrfs/extent-tree.c |  8 ++++++++
 fs/btrfs/hmzoned.h     | 12 ++++++++++++
 fs/btrfs/scrub.c       |  3 +++
 4 files changed, 27 insertions(+)

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index b25cff8af3b7..38a9830b4893 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -3545,6 +3545,8 @@ static int write_dev_supers(struct btrfs_device *device,
 		if (bytenr + BTRFS_SUPER_INFO_SIZE >=
 		    device->commit_total_bytes)
 			break;
+		if (!btrfs_check_super_location(device, bytenr))
+			continue;
 
 		btrfs_set_super_bytenr(sb, bytenr);
 
@@ -3611,6 +3613,8 @@ static int wait_dev_supers(struct btrfs_device *device, int max_mirrors)
 		if (bytenr + BTRFS_SUPER_INFO_SIZE >=
 		    device->commit_total_bytes)
 			break;
+		if (!btrfs_check_super_location(device, bytenr))
+			continue;
 
 		bh = __find_get_block(device->bdev,
 				      bytenr / BTRFS_BDEV_BLOCKSIZE,
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 457252ac7782..ddf5c26b9f58 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -239,6 +239,14 @@ static int exclude_super_stripes(struct btrfs_block_group_cache *cache)
 			if (logical[nr] + stripe_len <= cache->key.objectid)
 				continue;
 
+			/* shouldn't have super stripes in sequential zones */
+			if (cache->alloc_type == BTRFS_ALLOC_SEQ) {
+				btrfs_err(fs_info,
+		"sequentil allocation bg %llu should not have super blocks",
+					  cache->key.objectid);
+				return -EUCLEAN;
+			}
+
 			start = logical[nr];
 			if (start < cache->key.objectid) {
 				start = cache->key.objectid;
diff --git a/fs/btrfs/hmzoned.h b/fs/btrfs/hmzoned.h
index 40b4151fc935..9de26d6b8c4e 100644
--- a/fs/btrfs/hmzoned.h
+++ b/fs/btrfs/hmzoned.h
@@ -10,6 +10,7 @@
 #define BTRFS_HMZONED_H
 
 #include <linux/blkdev.h>
+#include "volumes.h"
 
 struct btrfs_zoned_device_info {
 	/*
@@ -125,4 +126,15 @@ static inline bool btrfs_can_zone_reset(struct btrfs_device *device,
 	return true;
 }
 
+static inline bool btrfs_check_super_location(struct btrfs_device *device,
+					      u64 pos)
+{
+	/*
+	 * On a non-zoned device, any address is OK. On a zoned
+	 * device, non-SEQUENTIAL WRITE REQUIRED zones are capable.
+	 */
+	return device->zone_info == NULL ||
+		!btrfs_dev_is_sequential(device, pos);
+}
+
 #endif
diff --git a/fs/btrfs/scrub.c b/fs/btrfs/scrub.c
index 0c99cf9fb595..e15d846c700a 100644
--- a/fs/btrfs/scrub.c
+++ b/fs/btrfs/scrub.c
@@ -18,6 +18,7 @@
 #include "check-integrity.h"
 #include "rcu-string.h"
 #include "raid56.h"
+#include "hmzoned.h"
 
 /*
  * This is only the first step towards a full-features scrub. It reads all
@@ -3732,6 +3733,8 @@ static noinline_for_stack int scrub_supers(struct scrub_ctx *sctx,
 		if (bytenr + BTRFS_SUPER_INFO_SIZE >
 		    scrub_dev->commit_total_bytes)
 			break;
+		if (!btrfs_check_super_location(scrub_dev, bytenr))
+			continue;
 
 		ret = scrub_pages(sctx, bytenr, BTRFS_SUPER_INFO_SIZE, bytenr,
 				  scrub_dev, BTRFS_EXTENT_FLAG_SUPER, gen, i,
-- 
2.23.0


  parent reply	other threads:[~2019-08-23 10:11 UTC|newest]

Thread overview: 38+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-23 10:10 [PATCH v4 00/27] btrfs zoned block device support Naohiro Aota
2019-08-23 10:10 ` [PATCH v4 01/27] btrfs: introduce HMZONED feature flag Naohiro Aota
2019-08-23 11:45   ` Johannes Thumshirn
2019-08-23 10:10 ` [PATCH v4 02/27] btrfs: Get zone information of zoned block devices Naohiro Aota
2019-08-23 11:57   ` Johannes Thumshirn
2019-08-26  6:29     ` Naohiro Aota
2019-08-24  9:22   ` kbuild test robot
2019-08-24 10:49   ` kbuild test robot
2019-08-23 10:10 ` [PATCH v4 03/27] btrfs: Check and enable HMZONED mode Naohiro Aota
2019-08-23 12:07   ` Johannes Thumshirn
2019-08-26  8:38     ` Naohiro Aota
2019-08-23 10:10 ` [PATCH v4 04/27] btrfs: disallow RAID5/6 in " Naohiro Aota
2019-08-23 12:09   ` Johannes Thumshirn
2019-08-23 10:10 ` [PATCH v4 05/27] btrfs: disallow space_cache " Naohiro Aota
2019-08-23 10:10 ` [PATCH v4 06/27] btrfs: disallow NODATACOW " Naohiro Aota
2019-08-23 10:10 ` [PATCH v4 07/27] btrfs: disable tree-log " Naohiro Aota
2019-08-23 10:10 ` [PATCH v4 08/27] btrfs: disable fallocate " Naohiro Aota
2019-08-23 10:10 ` [PATCH v4 09/27] btrfs: align device extent allocation to zone boundary Naohiro Aota
2019-08-23 10:10 ` [PATCH v4 10/27] btrfs: do sequential extent allocation in HMZONED mode Naohiro Aota
2019-08-23 10:10 ` [PATCH v4 11/27] btrfs: make unmirroed BGs readonly only if we have at least one writable BG Naohiro Aota
2019-08-23 10:10 ` [PATCH v4 12/27] btrfs: ensure metadata space available on/after degraded mount in HMZONED Naohiro Aota
2019-08-23 10:10 ` [PATCH v4 13/27] btrfs: reset zones of unused block groups Naohiro Aota
2019-08-24 11:32   ` kbuild test robot
2019-08-25  4:56   ` kbuild test robot
2019-08-23 10:10 ` Naohiro Aota [this message]
2019-08-23 10:10 ` [PATCH v4 15/27] btrfs: redirty released extent buffers in sequential BGs Naohiro Aota
2019-08-23 10:10 ` [PATCH v4 16/27] btrfs: serialize data allocation and submit IOs Naohiro Aota
2019-08-23 10:10 ` [PATCH v4 17/27] btrfs: implement atomic compressed IO submission Naohiro Aota
2019-08-23 10:10 ` [PATCH v4 18/27] btrfs: support direct write IO in HMZONED Naohiro Aota
2019-08-23 10:10 ` [PATCH v4 19/27] btrfs: serialize meta IOs on HMZONED mode Naohiro Aota
2019-08-23 10:10 ` [PATCH v4 20/27] btrfs: wait existing extents before truncating Naohiro Aota
2019-08-23 10:10 ` [PATCH v4 21/27] btrfs: avoid async checksum/submit on HMZONED mode Naohiro Aota
2019-08-23 10:10 ` [PATCH v4 22/27] btrfs: disallow mixed-bg in " Naohiro Aota
2019-08-23 10:10 ` [PATCH v4 23/27] btrfs: disallow inode_cache " Naohiro Aota
2019-08-23 10:10 ` [PATCH v4 24/27] btrfs: support dev-replace " Naohiro Aota
2019-08-23 10:10 ` [PATCH v4 25/27] btrfs: enable relocation " Naohiro Aota
2019-08-23 10:10 ` [PATCH v4 26/27] btrfs: relocate block group to repair IO failure in HMZONED Naohiro Aota
2019-08-23 10:10 ` [PATCH v4 27/27] btrfs: enable to mount HMZONED incompat flag Naohiro Aota

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