6.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Luca Stefani <luca.stefani.ge1@xxxxxxxxx>
commit 3368597206dc3c6c3c2247ee146beada14c67380 upstream.
Even in case of failure we could've discarded some data and userspace
should be made aware of it, so copy fstrim_range to userspace
regardless.
Also make sure to update the trimmed bytes amount even if
btrfs_trim_free_extents fails.
CC: stable@xxxxxxxxxxxxxxx # 5.15+
Reviewed-by: Qu Wenruo <wqu@xxxxxxxx>
Signed-off-by: Luca Stefani <luca.stefani.ge1@xxxxxxxxx>
Reviewed-by: David Sterba <dsterba@xxxxxxxx>
Signed-off-by: David Sterba <dsterba@xxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/btrfs/extent-tree.c | 4 ++--
fs/btrfs/ioctl.c | 4 +---
2 files changed, 3 insertions(+), 5 deletions(-)
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -6175,13 +6175,13 @@ int btrfs_trim_fs(struct btrfs_fs_info *
continue;
ret = btrfs_trim_free_extents(device, &group_trimmed);
+
+ trimmed += group_trimmed;
if (ret) {
dev_failed++;
dev_ret = ret;
break;
}
-
- trimmed += group_trimmed;
}
mutex_unlock(&fs_devices->device_list_mutex);
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -533,13 +533,11 @@ static noinline int btrfs_ioctl_fitrim(s
range.minlen = max(range.minlen, minlen);
ret = btrfs_trim_fs(fs_info, &range);
- if (ret < 0)
- return ret;
if (copy_to_user(arg, &range, sizeof(range)))
return -EFAULT;
- return 0;
+ return ret;
}
int __pure btrfs_is_empty_uuid(u8 *uuid)
