diff options
| author | Johannes Thumshirn <johannes.thumshirn@wdc.com> | 2024-07-08 14:24:08 +0300 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2024-09-10 17:51:12 +0300 |
| commit | 8c4cba2adbb0ec63f3833cad7452a431580e9ffa (patch) | |
| tree | 72a9965f05e7ff0e4f88348b9b131f51bb429fb0 | |
| parent | da3ea35007d0af457a0afc87e84fddaebc4e0b63 (diff) | |
| download | linux-8c4cba2adbb0ec63f3833cad7452a431580e9ffa.tar.xz | |
btrfs: update stripe extents for existing logical addresses
Update a stripe extent in case of an already existing logical address,
but with different physical addresses and/or device id instead of
bailing out with EEXIST.
This can happen i.e. in case of a device replace operation, where data
extents get rewritten to a new disk.
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: David Sterba <dsterba@suse.com>
| -rw-r--r-- | fs/btrfs/raid-stripe-tree.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/fs/btrfs/raid-stripe-tree.c b/fs/btrfs/raid-stripe-tree.c index e6f7a234b8f6..0c7b928805e5 100644 --- a/fs/btrfs/raid-stripe-tree.c +++ b/fs/btrfs/raid-stripe-tree.c @@ -73,6 +73,36 @@ int btrfs_delete_raid_extent(struct btrfs_trans_handle *trans, u64 start, u64 le return ret; } +static int update_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_path *path; + struct extent_buffer *leaf; + int ret; + int slot; + + path = btrfs_alloc_path(); + if (!path) + return -ENOMEM; + + ret = btrfs_search_slot(trans, trans->fs_info->stripe_root, key, path, + 0, 1); + if (ret) + return (ret == 1 ? ret : -EINVAL); + + leaf = path->nodes[0]; + slot = path->slots[0]; + + write_extent_buffer(leaf, stripe_extent, btrfs_item_ptr_offset(leaf, slot), + item_size); + btrfs_mark_buffer_dirty(trans, leaf); + 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 +142,9 @@ 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 = update_raid_extent_item(trans, &stripe_key, stripe_extent, + item_size); if (ret) btrfs_abort_transaction(trans, ret); |