lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <20240701-b4-rst-updates-v3-1-e0437e1e04a6@kernel.org>
Date: Mon, 01 Jul 2024 12:25:15 +0200
From: Johannes Thumshirn <jth@...nel.org>
To: Chris Mason <clm@...com>, Josef Bacik <josef@...icpanda.com>, 
 David Sterba <dsterba@...e.com>
Cc: linux-btrfs@...r.kernel.org, linux-kernel@...r.kernel.org, 
 Johannes Thumshirn <johannes.thumshirn@....com>
Subject: [PATCH v3 1/5] btrfs: replace stripe extents

From: Johannes Thumshirn <johannes.thumshirn@....com>

If we can't insert a stripe extent in the RAID stripe tree, because
the key that points to the specific position in the stripe tree is
already existing, we have to remove the item and then replace it by a
new item.

This can happen for example on device replace operations.

Signed-off-by: Johannes Thumshirn <johannes.thumshirn@....com>
---
 fs/btrfs/raid-stripe-tree.c | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)

diff --git a/fs/btrfs/raid-stripe-tree.c b/fs/btrfs/raid-stripe-tree.c
index e6f7a234b8f6..3020820dd6e2 100644
--- a/fs/btrfs/raid-stripe-tree.c
+++ b/fs/btrfs/raid-stripe-tree.c
@@ -73,6 +73,37 @@ int btrfs_delete_raid_extent(struct btrfs_trans_handle *trans, u64 start, u64 le
 	return ret;
 }
 
+static int replace_raid_extent_item(struct btrfs_trans_handle *trans,
+				    struct btrfs_key *key,
+				    struct btrfs_stripe_extent *stripe_extent,
+				    const size_t item_size)
+{
+	struct btrfs_fs_info *fs_info = trans->fs_info;
+	struct btrfs_root *stripe_root = fs_info->stripe_root;
+	struct btrfs_path *path;
+	int ret;
+
+	path = btrfs_alloc_path();
+	if (!path)
+		return -ENOMEM;
+
+	ret = btrfs_search_slot(trans, stripe_root, key, path, -1, 1);
+	if (ret)
+		goto err;
+
+	ret = btrfs_del_item(trans, stripe_root, path);
+	if (ret)
+		goto err;
+
+	btrfs_free_path(path);
+
+	return btrfs_insert_item(trans, stripe_root, key, stripe_extent,
+				 item_size);
+ err:
+	btrfs_free_path(path);
+	return ret;
+}
+
 static int btrfs_insert_one_raid_extent(struct btrfs_trans_handle *trans,
 					struct btrfs_io_context *bioc)
 {
@@ -112,6 +143,9 @@ static int btrfs_insert_one_raid_extent(struct btrfs_trans_handle *trans,
 
 	ret = btrfs_insert_item(trans, stripe_root, &stripe_key, stripe_extent,
 				item_size);
+	if (ret == -EEXIST)
+		ret = replace_raid_extent_item(trans, &stripe_key,
+					       stripe_extent, item_size);
 	if (ret)
 		btrfs_abort_transaction(trans, ret);
 

-- 
2.43.0


Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ