From: Josef Bacik <josef@toxicpanda.com>
To: Naohiro Aota <naohiro.aota@wdc.com>,
linux-btrfs@vger.kernel.org, dsterba@suse.com
Cc: hare@suse.com, linux-fsdevel@vger.kernel.org,
Jens Axboe <axboe@kernel.dk>,
Christoph Hellwig <hch@infradead.org>,
"Darrick J. Wong" <darrick.wong@oracle.com>
Subject: Re: [PATCH v11 12/40] btrfs: calculate allocation offset for conventional zones
Date: Tue, 12 Jan 2021 10:12:03 -0500 [thread overview]
Message-ID: <95f5ef2f-ab89-9907-5c34-f9d9f7f88a9d@toxicpanda.com> (raw)
In-Reply-To: <5101ed472a046b3fc691aeb90f84bb55790d4fc0.1608608848.git.naohiro.aota@wdc.com>
On 12/21/20 10:49 PM, Naohiro Aota wrote:
> Conventional zones do not have a write pointer, so we cannot use it to
> determine the allocation offset if a block group contains a conventional
> zone.
>
> But instead, we can consider the end of the last allocated extent in the
> block group as an allocation offset.
>
> For new block group, we cannot calculate the allocation offset by
> consulting the extent tree, because it can cause deadlock by taking extent
> buffer lock after chunk mutex (which is already taken in
> btrfs_make_block_group()). Since it is a new block group, we can simply set
> the allocation offset to 0, anyway.
>
> Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
> ---
> fs/btrfs/block-group.c | 4 +-
> fs/btrfs/zoned.c | 93 +++++++++++++++++++++++++++++++++++++++---
> fs/btrfs/zoned.h | 4 +-
> 3 files changed, 92 insertions(+), 9 deletions(-)
>
> diff --git a/fs/btrfs/block-group.c b/fs/btrfs/block-group.c
> index 8c029e45a573..9eb1e3aa5e0f 100644
> --- a/fs/btrfs/block-group.c
> +++ b/fs/btrfs/block-group.c
> @@ -1867,7 +1867,7 @@ static int read_one_block_group(struct btrfs_fs_info *info,
> goto error;
> }
>
> - ret = btrfs_load_block_group_zone_info(cache);
> + ret = btrfs_load_block_group_zone_info(cache, false);
> if (ret) {
> btrfs_err(info, "zoned: failed to load zone info of bg %llu",
> cache->start);
> @@ -2150,7 +2150,7 @@ int btrfs_make_block_group(struct btrfs_trans_handle *trans, u64 bytes_used,
> if (btrfs_fs_compat_ro(fs_info, FREE_SPACE_TREE))
> cache->needs_free_space = 1;
>
> - ret = btrfs_load_block_group_zone_info(cache);
> + ret = btrfs_load_block_group_zone_info(cache, true);
> if (ret) {
> btrfs_put_block_group(cache);
> return ret;
> diff --git a/fs/btrfs/zoned.c b/fs/btrfs/zoned.c
> index adca89a5ebc1..ceb6d0d7d33b 100644
> --- a/fs/btrfs/zoned.c
> +++ b/fs/btrfs/zoned.c
> @@ -897,7 +897,62 @@ int btrfs_ensure_empty_zones(struct btrfs_device *device, u64 start, u64 size)
> return 0;
> }
>
> -int btrfs_load_block_group_zone_info(struct btrfs_block_group *cache)
> +static int calculate_alloc_pointer(struct btrfs_block_group *cache,
> + u64 *offset_ret)
> +{
> + struct btrfs_fs_info *fs_info = cache->fs_info;
> + struct btrfs_root *root = fs_info->extent_root;
> + struct btrfs_path *path;
> + struct btrfs_key key;
> + struct btrfs_key found_key;
> + int ret;
> + u64 length;
> +
> + path = btrfs_alloc_path();
> + if (!path)
> + return -ENOMEM;
> +
> + key.objectid = cache->start + cache->length;
> + key.type = 0;
> + key.offset = 0;
> +
> + ret = btrfs_search_slot(NULL, root, &key, path, 0, 0);
> + /* We should not find the exact match */
> + if (ret <= 0) {
> + ret = -EUCLEAN;
> + goto out;
> + }
We're eating the return value here if ret < 0, so I'd rather we do something like
if (!ret)
ret = -EUCLEAN;
if (ret < 0)
goto out;
Thanks,
Josef
next prev parent reply other threads:[~2021-01-12 15:13 UTC|newest]
Thread overview: 86+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-22 3:48 [PATCH v11 00/40] btrfs: zoned block device support Naohiro Aota
2020-12-22 3:48 ` [PATCH v11 01/40] block: add bio_add_zone_append_page Naohiro Aota
2020-12-22 3:48 ` [PATCH v11 02/40] iomap: support REQ_OP_ZONE_APPEND Naohiro Aota
2021-01-04 22:30 ` Darrick J. Wong
2021-01-13 9:34 ` Johannes Thumshirn
2020-12-22 3:48 ` [PATCH v11 03/40] btrfs: defer loading zone info after opening trees Naohiro Aota
2021-01-11 19:16 ` Josef Bacik
2020-12-22 3:48 ` [PATCH v11 04/40] btrfs: change superblock location on conventional zone Naohiro Aota
2021-01-11 19:47 ` Josef Bacik
2021-01-14 15:10 ` Naohiro Aota
2020-12-22 3:48 ` [PATCH v11 05/40] btrfs: release path before calling into btrfs_load_block_group_zone_info Naohiro Aota
2021-01-11 20:01 ` Josef Bacik
2021-01-12 8:05 ` Johannes Thumshirn
2020-12-22 3:48 ` [PATCH v11 06/40] btrfs: do not load fs_info->zoned from incompat flag Naohiro Aota
2021-01-11 20:08 ` Josef Bacik
2021-01-12 8:00 ` Johannes Thumshirn
2020-12-22 3:49 ` [PATCH v11 07/40] btrfs: disallow fitrim in ZONED mode Naohiro Aota
2021-01-11 20:12 ` Josef Bacik
2021-01-12 10:19 ` Johannes Thumshirn
2020-12-22 3:49 ` [PATCH v11 08/40] btrfs: emulated zoned mode on non-zoned devices Naohiro Aota
2021-01-11 20:54 ` Josef Bacik
2021-01-13 17:58 ` David Sterba
2021-01-13 18:23 ` Johannes Thumshirn
2020-12-22 3:49 ` [PATCH v11 09/40] btrfs: implement zoned chunk allocator Naohiro Aota
2021-01-11 21:24 ` Josef Bacik
2020-12-22 3:49 ` [PATCH v11 10/40] btrfs: verify device extent is aligned to zone Naohiro Aota
2020-12-22 3:49 ` [PATCH v11 11/40] btrfs: load zone's allocation offset Naohiro Aota
2020-12-22 3:49 ` [PATCH v11 12/40] btrfs: calculate allocation offset for conventional zones Naohiro Aota
2021-01-12 15:12 ` Josef Bacik [this message]
2020-12-22 3:49 ` [PATCH v11 13/40] btrfs: track unusable bytes for zones Naohiro Aota
2021-01-12 15:45 ` Josef Bacik
2020-12-22 3:49 ` [PATCH v11 14/40] btrfs: do sequential extent allocation in ZONED mode Naohiro Aota
2020-12-22 3:49 ` [PATCH v11 15/40] btrfs: redirty released extent buffers " Naohiro Aota
2021-01-12 15:51 ` Josef Bacik
2020-12-22 3:49 ` [PATCH v11 16/40] btrfs: advance allocation pointer after tree log node Naohiro Aota
2021-01-12 15:52 ` Josef Bacik
2020-12-22 3:49 ` [PATCH v11 17/40] btrfs: enable to mount ZONED incompat flag Naohiro Aota
2020-12-22 3:49 ` [PATCH v11 18/40] btrfs: reset zones of unused block groups Naohiro Aota
2021-01-12 15:54 ` Josef Bacik
2020-12-22 3:49 ` [PATCH v11 19/40] btrfs: extract page adding function Naohiro Aota
2021-01-11 16:22 ` Josef Bacik
2020-12-22 3:49 ` [PATCH v11 20/40] btrfs: use bio_add_zone_append_page for zoned btrfs Naohiro Aota
2021-01-12 15:55 ` Josef Bacik
2020-12-22 3:49 ` [PATCH v11 21/40] btrfs: handle REQ_OP_ZONE_APPEND as writing Naohiro Aota
2020-12-22 3:49 ` [PATCH v11 22/40] btrfs: split ordered extent when bio is sent Naohiro Aota
2021-01-12 15:59 ` Josef Bacik
2021-01-13 10:05 ` Johannes Thumshirn
2021-01-15 7:08 ` Su Yue
2020-12-22 3:49 ` [PATCH v11 23/40] btrfs: extend btrfs_rmap_block for specifying a device Naohiro Aota
2021-01-12 16:00 ` Josef Bacik
2020-12-22 3:49 ` [PATCH v11 24/40] btrfs: cache if block-group is on a sequential zone Naohiro Aota
2021-01-12 16:01 ` Josef Bacik
2020-12-22 3:49 ` [PATCH v11 25/40] btrfs: use ZONE_APPEND write for ZONED btrfs Naohiro Aota
2020-12-22 3:49 ` [PATCH v11 26/40] btrfs: enable zone append writing for direct IO Naohiro Aota
2020-12-22 3:49 ` [PATCH v11 27/40] btrfs: introduce dedicated data write path for ZONED mode Naohiro Aota
2021-01-12 19:24 ` Josef Bacik
2021-01-13 10:41 ` Naohiro Aota
2021-01-12 19:28 ` Josef Bacik
2020-12-22 3:49 ` [PATCH v11 28/40] btrfs: serialize meta IOs on " Naohiro Aota
2020-12-22 3:49 ` [PATCH v11 29/40] btrfs: wait existing extents before truncating Naohiro Aota
2020-12-22 3:49 ` [PATCH v11 30/40] btrfs: avoid async metadata checksum on ZONED mode Naohiro Aota
2020-12-22 3:49 ` [PATCH v11 31/40] btrfs: mark block groups to copy for device-replace Naohiro Aota
2021-01-12 19:30 ` Josef Bacik
2020-12-22 3:49 ` [PATCH v11 32/40] btrfs: implement cloning for ZONED device-replace Naohiro Aota
2021-01-12 19:36 ` Josef Bacik
2020-12-22 3:49 ` [PATCH v11 33/40] btrfs: implement copying " Naohiro Aota
2021-01-12 19:37 ` Josef Bacik
2020-12-22 3:49 ` [PATCH v11 34/40] btrfs: support dev-replace in ZONED mode Naohiro Aota
2021-01-12 19:37 ` Josef Bacik
2021-01-12 19:40 ` Josef Bacik
2020-12-22 3:49 ` [PATCH v11 35/40] btrfs: enable relocation " Naohiro Aota
2021-01-12 19:43 ` Josef Bacik
2020-12-22 3:49 ` [PATCH v11 36/40] btrfs: relocate block group to repair IO failure in ZONED Naohiro Aota
2020-12-22 3:49 ` [PATCH v11 37/40] btrfs: split alloc_log_tree() Naohiro Aota
2021-01-12 19:44 ` Josef Bacik
2020-12-22 3:49 ` [PATCH v11 38/40] btrfs: extend zoned allocator to use dedicated tree-log block group Naohiro Aota
2021-01-12 19:48 ` Josef Bacik
2020-12-22 3:49 ` [PATCH v11 39/40] btrfs: serialize log transaction on ZONED mode Naohiro Aota
2021-01-12 19:50 ` Josef Bacik
2020-12-22 3:49 ` [PATCH v11 40/40] btrfs: reorder log node allocation Naohiro Aota
2020-12-22 13:35 ` [PATCH v11 01/40] block: add bio_add_zone_append_page Christoph Hellwig
2021-01-12 13:48 ` Johannes Thumshirn
2020-12-22 13:38 ` [PATCH v11 00/40] btrfs: zoned block device support Christoph Hellwig
2021-01-11 10:17 ` Johannes Thumshirn
2021-01-12 10:23 ` hch
2021-01-12 10:26 ` Johannes Thumshirn
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