This is a note to let you know that I've just added the patch titled
btrfs: check for relocation inodes on zoned btrfs in should_nocow
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
btrfs-check-for-relocation-inodes-on-zoned-btrfs-in-should_nocow.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Fri Nov 19 01:33:42 PM CET 2021
From: Johannes Thumshirn <johannes.thumshirn@xxxxxxx>
Date: Thu, 18 Nov 2021 17:58:17 +0900
Subject: btrfs: check for relocation inodes on zoned btrfs in should_nocow
To: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Cc: linux-btrfs@xxxxxxxxxxxxxxx, stable@xxxxxxxxxxxxxxx, Naohiro Aota <naohiro.aota@xxxxxxx>, David Sterba <dsterba@xxxxxxxx>, Johannes Thumshirn <johannes.thumshirn@xxxxxxx>
Message-ID: <2b57613ad55081ae305f66db17dec297f84c04ca.1637225333.git.johannes.thumshirn@xxxxxxx>
From: Johannes Thumshirn <johannes.thumshirn@xxxxxxx>
commit 2adada886b26e998b5a624e72f0834ebfdc54cc7 upstream
Prepare for allowing preallocation for relocation inodes.
Reviewed-by: Naohiro Aota <naohiro.aota@xxxxxxx>
Signed-off-by: Johannes Thumshirn <johannes.thumshirn@xxxxxxx>
Reviewed-by: David Sterba <dsterba@xxxxxxxx>
Signed-off-by: David Sterba <dsterba@xxxxxxxx>
Signed-off-by: Johannes Thumshirn <johannes.thumshirn@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/btrfs/inode.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -1945,7 +1945,15 @@ int btrfs_run_delalloc_range(struct btrf
const bool zoned = btrfs_is_zoned(inode->root->fs_info);
if (should_nocow(inode, start, end)) {
- ASSERT(!zoned);
+ /*
+ * Normally on a zoned device we're only doing COW writes, but
+ * in case of relocation on a zoned filesystem we have taken
+ * precaution, that we're only writing sequentially. It's safe
+ * to use run_delalloc_nocow() here, like for regular
+ * preallocated inodes.
+ */
+ ASSERT(!zoned ||
+ (zoned && btrfs_is_data_reloc_root(inode->root)));
ret = run_delalloc_nocow(inode, locked_page, start, end,
page_started, nr_written);
} else if (!inode_can_compress(inode) ||
Patches currently in stable-queue which might be from johannes.thumshirn@xxxxxxx are
queue-5.15/btrfs-zoned-add-a-dedicated-data-relocation-block-group.patch
queue-5.15/btrfs-check-for-relocation-inodes-on-zoned-btrfs-in-should_nocow.patch
queue-5.15/btrfs-zoned-use-regular-writes-for-relocation.patch
queue-5.15/btrfs-introduce-btrfs_is_data_reloc_root.patch
queue-5.15/btrfs-zoned-allow-preallocation-for-relocation-inodes.patch
queue-5.15/btrfs-zoned-only-allow-one-process-to-add-pages-to-a-relocation-inode.patch
