From: Naohiro Aota <naohiro.aota@wdc.com>
To: 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>,
Naohiro Aota <naohiro.aota@wdc.com>,
Josef Bacik <josef@toxicpanda.com>
Subject: [PATCH v13 03/42] btrfs: defer loading zone info after opening trees
Date: Fri, 22 Jan 2021 15:21:03 +0900 [thread overview]
Message-ID: <6863be2df7ec31c8a8266342c5b7e4bfb8c8a5b7.1611295439.git.naohiro.aota@wdc.com> (raw)
In-Reply-To: <cover.1611295439.git.naohiro.aota@wdc.com>
This is preparation patch to implement zone emulation on a regular device.
To emulate zoned mode on a regular (non-zoned) device, we need to decide an
emulating zone size. Instead of making it compile-time static value, we'll
make it configurable at mkfs time. Since we have one zone == one device
extent restriction, we can determine the emulated zone size from the size
of a device extent. We can extend btrfs_get_dev_zone_info() to show a
regular device filled with conventional zones once the zone size is
decided.
The current call site of btrfs_get_dev_zone_info() during the mount process
is earlier than reading the trees, so we can't slice a regular device to
conventional zones. This patch defers the loading of zone info to
open_ctree() to load the emulated zone size from a device extent.
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
---
fs/btrfs/disk-io.c | 13 +++++++++++++
fs/btrfs/volumes.c | 4 ----
fs/btrfs/zoned.c | 24 ++++++++++++++++++++++++
fs/btrfs/zoned.h | 7 +++++++
4 files changed, 44 insertions(+), 4 deletions(-)
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 5473bed6a7e8..39cbe10a81b6 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -3257,6 +3257,19 @@ int __cold open_ctree(struct super_block *sb, struct btrfs_fs_devices *fs_device
if (ret)
goto fail_tree_roots;
+ /*
+ * Get zone type information of zoned block devices. This will also
+ * handle emulation of the zoned mode for btrfs if a regular device has
+ * the zoned incompat feature flag set.
+ */
+ ret = btrfs_get_dev_zone_info_all_devices(fs_info);
+ if (ret) {
+ btrfs_err(fs_info,
+ "failed to read device zone info: %d",
+ ret);
+ goto fail_block_groups;
+ }
+
/*
* If we have a uuid root and we're not being told to rescan we need to
* check the generation here so we can set the
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index badb972919eb..bb3f341f6a22 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -669,10 +669,6 @@ static int btrfs_open_one_device(struct btrfs_fs_devices *fs_devices,
clear_bit(BTRFS_DEV_STATE_IN_FS_METADATA, &device->dev_state);
device->mode = flags;
- ret = btrfs_get_dev_zone_info(device);
- if (ret != 0)
- goto error_free_page;
-
fs_devices->open_devices++;
if (test_bit(BTRFS_DEV_STATE_WRITEABLE, &device->dev_state) &&
device->devid != BTRFS_DEV_REPLACE_DEVID) {
diff --git a/fs/btrfs/zoned.c b/fs/btrfs/zoned.c
index c38846659019..bcabdb2c97f1 100644
--- a/fs/btrfs/zoned.c
+++ b/fs/btrfs/zoned.c
@@ -143,6 +143,30 @@ static int btrfs_get_dev_zones(struct btrfs_device *device, u64 pos,
return 0;
}
+int btrfs_get_dev_zone_info_all_devices(struct btrfs_fs_info *fs_info)
+{
+ struct btrfs_fs_devices *fs_devices = fs_info->fs_devices;
+ struct btrfs_device *device;
+ int ret = 0;
+
+ if (!btrfs_fs_incompat(fs_info, ZONED))
+ return 0;
+
+ mutex_lock(&fs_devices->device_list_mutex);
+ list_for_each_entry(device, &fs_devices->devices, dev_list) {
+ /* We can skip reading of zone info for missing devices */
+ if (!device->bdev)
+ continue;
+
+ ret = btrfs_get_dev_zone_info(device);
+ if (ret)
+ break;
+ }
+ mutex_unlock(&fs_devices->device_list_mutex);
+
+ return ret;
+}
+
int btrfs_get_dev_zone_info(struct btrfs_device *device)
{
struct btrfs_zoned_device_info *zone_info = NULL;
diff --git a/fs/btrfs/zoned.h b/fs/btrfs/zoned.h
index 8abe2f83272b..5e0e7de84a82 100644
--- a/fs/btrfs/zoned.h
+++ b/fs/btrfs/zoned.h
@@ -25,6 +25,7 @@ struct btrfs_zoned_device_info {
#ifdef CONFIG_BLK_DEV_ZONED
int btrfs_get_dev_zone(struct btrfs_device *device, u64 pos,
struct blk_zone *zone);
+int btrfs_get_dev_zone_info_all_devices(struct btrfs_fs_info *fs_info);
int btrfs_get_dev_zone_info(struct btrfs_device *device);
void btrfs_destroy_dev_zone_info(struct btrfs_device *device);
int btrfs_check_zoned_mode(struct btrfs_fs_info *fs_info);
@@ -42,6 +43,12 @@ static inline int btrfs_get_dev_zone(struct btrfs_device *device, u64 pos,
return 0;
}
+static inline int btrfs_get_dev_zone_info_all_devices(
+ struct btrfs_fs_info *fs_info)
+{
+ return 0;
+}
+
static inline int btrfs_get_dev_zone_info(struct btrfs_device *device)
{
return 0;
--
2.27.0
next prev parent reply other threads:[~2021-01-22 6:24 UTC|newest]
Thread overview: 62+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-22 6:21 [PATCH v13 00/42] btrfs: zoned block device support Naohiro Aota
2021-01-22 6:21 ` [PATCH v13 01/42] block: add bio_add_zone_append_page Naohiro Aota
2021-01-23 2:50 ` Chaitanya Kulkarni
2021-01-23 3:08 ` Chaitanya Kulkarni
2021-01-25 17:31 ` Johannes Thumshirn
2021-01-22 6:21 ` [PATCH v13 02/42] iomap: support REQ_OP_ZONE_APPEND Naohiro Aota
2021-01-23 2:56 ` Chaitanya Kulkarni
2021-01-22 6:21 ` Naohiro Aota [this message]
2021-01-22 6:21 ` [PATCH v13 04/42] btrfs: use regular SB location on emulated zoned mode Naohiro Aota
2021-01-22 6:21 ` [PATCH v13 05/42] btrfs: release path before calling into btrfs_load_block_group_zone_info Naohiro Aota
2021-01-22 14:57 ` Josef Bacik
2021-01-22 6:21 ` [PATCH v13 06/42] btrfs: do not load fs_info->zoned from incompat flag Naohiro Aota
2021-01-22 14:58 ` Josef Bacik
2021-01-22 6:21 ` [PATCH v13 07/42] btrfs: disallow fitrim in ZONED mode Naohiro Aota
2021-01-22 14:59 ` Josef Bacik
2021-01-22 6:21 ` [PATCH v13 08/42] btrfs: allow zoned mode on non-zoned block devices Naohiro Aota
2021-01-22 15:03 ` Josef Bacik
2021-01-22 6:21 ` [PATCH v13 09/42] btrfs: implement zoned chunk allocator Naohiro Aota
2021-01-22 6:21 ` [PATCH v13 10/42] btrfs: verify device extent is aligned to zone Naohiro Aota
2021-01-22 6:21 ` [PATCH v13 11/42] btrfs: load zone's allocation offset Naohiro Aota
2021-01-22 6:21 ` [PATCH v13 12/42] btrfs: calculate allocation offset for conventional zones Naohiro Aota
2021-01-22 15:07 ` Josef Bacik
2021-01-22 6:21 ` [PATCH v13 13/42] btrfs: track unusable bytes for zones Naohiro Aota
2021-01-22 15:11 ` Josef Bacik
2021-01-25 10:37 ` Johannes Thumshirn
2021-01-25 12:08 ` Johannes Thumshirn
2021-01-22 6:21 ` [PATCH v13 14/42] btrfs: do sequential extent allocation in ZONED mode Naohiro Aota
2021-01-22 6:21 ` [PATCH v13 15/42] btrfs: redirty released extent buffers " Naohiro Aota
2021-01-22 6:21 ` [PATCH v13 16/42] btrfs: advance allocation pointer after tree log node Naohiro Aota
2021-01-22 6:21 ` [PATCH v13 17/42] btrfs: enable to mount ZONED incompat flag Naohiro Aota
2021-01-22 6:21 ` [PATCH v13 18/42] btrfs: reset zones of unused block groups Naohiro Aota
2021-01-22 6:21 ` [PATCH v13 19/42] btrfs: extract page adding function Naohiro Aota
2021-01-22 6:21 ` [PATCH v13 20/42] btrfs: use bio_add_zone_append_page for zoned btrfs Naohiro Aota
2021-01-22 6:21 ` [PATCH v13 21/42] btrfs: handle REQ_OP_ZONE_APPEND as writing Naohiro Aota
2021-01-22 6:21 ` [PATCH v13 22/42] btrfs: split ordered extent when bio is sent Naohiro Aota
2021-01-22 15:22 ` Josef Bacik
2021-01-25 8:56 ` Johannes Thumshirn
2021-01-25 9:02 ` Johannes Thumshirn
2021-01-22 6:21 ` [PATCH v13 23/42] btrfs: check if bio spans across an ordered extent Naohiro Aota
2021-01-22 15:23 ` Josef Bacik
2021-01-22 6:21 ` [PATCH v13 24/42] btrfs: extend btrfs_rmap_block for specifying a device Naohiro Aota
2021-01-22 6:21 ` [PATCH v13 25/42] btrfs: cache if block-group is on a sequential zone Naohiro Aota
2021-01-22 6:21 ` [PATCH v13 26/42] btrfs: save irq flags when looking up an ordered extent Naohiro Aota
2021-01-22 15:24 ` Josef Bacik
2021-01-22 6:21 ` [PATCH v13 27/42] btrfs: use ZONE_APPEND write for ZONED btrfs Naohiro Aota
2021-01-22 15:29 ` Josef Bacik
2021-01-22 6:21 ` [PATCH v13 28/42] btrfs: enable zone append writing for direct IO Naohiro Aota
2021-01-22 6:21 ` [PATCH v13 29/42] btrfs: introduce dedicated data write path for ZONED mode Naohiro Aota
2021-01-22 6:21 ` [PATCH v13 30/42] btrfs: serialize meta IOs on " Naohiro Aota
2021-01-22 6:21 ` [PATCH v13 31/42] btrfs: wait existing extents before truncating Naohiro Aota
2021-01-22 6:21 ` [PATCH v13 32/42] btrfs: avoid async metadata checksum on ZONED mode Naohiro Aota
2021-01-22 6:21 ` [PATCH v13 33/42] btrfs: mark block groups to copy for device-replace Naohiro Aota
2021-01-22 6:21 ` [PATCH v13 34/42] btrfs: implement cloning for ZONED device-replace Naohiro Aota
2021-01-22 6:21 ` [PATCH v13 35/42] btrfs: implement copying " Naohiro Aota
2021-01-22 6:21 ` [PATCH v13 36/42] btrfs: support dev-replace in ZONED mode Naohiro Aota
2021-01-22 6:21 ` [PATCH v13 37/42] btrfs: enable relocation " Naohiro Aota
2021-01-22 6:21 ` [PATCH v13 38/42] btrfs: relocate block group to repair IO failure in ZONED Naohiro Aota
2021-01-22 6:21 ` [PATCH v13 39/42] btrfs: split alloc_log_tree() Naohiro Aota
2021-01-22 6:21 ` [PATCH v13 40/42] btrfs: extend zoned allocator to use dedicated tree-log block group Naohiro Aota
2021-01-22 6:21 ` [PATCH v13 41/42] btrfs: serialize log transaction on ZONED mode Naohiro Aota
2021-01-22 15:37 ` Josef Bacik
2021-01-22 6:21 ` [PATCH v13 42/42] btrfs: reorder log node allocation Naohiro Aota
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