From 2f1aeab9fca1a5f583be1add175d1ee95c213cfa Mon Sep 17 00:00:00 2001 From: Anand Jain Date: Tue, 19 Mar 2024 08:28:18 +0530 Subject: btrfs: return accurate error code on open failure in open_fs_devices() When attempting to exclusive open a device which has no exclusive open permission, such as a physical device associated with the flakey dm device, the open operation will fail, resulting in a mount failure. In this particular scenario, we erroneously return -EINVAL instead of the correct error code provided by the bdev_open_by_path() function, which is -EBUSY. Fix this, by returning error code from the bdev_open_by_path() function. With this correction, the mount error message will align with that of ext4 and xfs. Reviewed-by: Boris Burkov Signed-off-by: Anand Jain Reviewed-by: David Sterba Signed-off-by: David Sterba --- fs/btrfs/volumes.c | 17 ++++++++++++----- 1 file changed, 12 insertions(+), 5 deletions(-) diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index c318640b4472a3..dedec3d9b1117d 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -1184,23 +1184,30 @@ static int open_fs_devices(struct btrfs_fs_devices *fs_devices, struct btrfs_device *device; struct btrfs_device *latest_dev = NULL; struct btrfs_device *tmp_device; + int ret = 0; list_for_each_entry_safe(device, tmp_device, &fs_devices->devices, dev_list) { - int ret; + int ret2; - ret = btrfs_open_one_device(fs_devices, device, flags, holder); - if (ret == 0 && + ret2 = btrfs_open_one_device(fs_devices, device, flags, holder); + if (ret2 == 0 && (!latest_dev || device->generation > latest_dev->generation)) { latest_dev = device; - } else if (ret == -ENODATA) { + } else if (ret2 == -ENODATA) { fs_devices->num_devices--; list_del(&device->dev_list); btrfs_free_device(device); } + if (ret == 0 && ret2 != 0) + ret = ret2; } - if (fs_devices->open_devices == 0) + + if (fs_devices->open_devices == 0) { + if (ret) + return ret; return -EINVAL; + } fs_devices->opened = 1; fs_devices->latest_dev = latest_dev; -- cgit 1.2.3-korg