On 25.05.2018 00:41, Omar Sandoval wrote:
> From: Omar Sandoval <osandov@xxxxxx>
>
> btrfs_ioctl_rm_dev() and btrfs_ioctl_rm_dev_v2() both manipulate this
> bit. Let's move it into the common btrfs_rm_device(), which also makes
> the following change to deal with swap files easier.
>
> Signed-off-by: Omar Sandoval <osandov@xxxxxx>
Reviewed-by: Nikolay Borisov <nborisov@xxxxxxxx>
> ---
> fs/btrfs/ioctl.c | 13 -------------
> fs/btrfs/volumes.c | 4 ++++
> 2 files changed, 4 insertions(+), 13 deletions(-)
>
> diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
> index 9af3be96099f..82be4a94334b 100644
> --- a/fs/btrfs/ioctl.c
> +++ b/fs/btrfs/ioctl.c
> @@ -3091,18 +3091,12 @@ static long btrfs_ioctl_rm_dev_v2(struct file *file, void __user *arg)
> goto out;
> }
>
> - if (test_and_set_bit(BTRFS_FS_EXCL_OP, &fs_info->flags)) {
> - ret = BTRFS_ERROR_DEV_EXCL_RUN_IN_PROGRESS;
> - goto out;
> - }
> -
> if (vol_args->flags & BTRFS_DEVICE_SPEC_BY_ID) {
> ret = btrfs_rm_device(fs_info, NULL, vol_args->devid);
> } else {
> vol_args->name[BTRFS_SUBVOL_NAME_MAX] = '\0';
> ret = btrfs_rm_device(fs_info, vol_args->name, 0);
> }
> - clear_bit(BTRFS_FS_EXCL_OP, &fs_info->flags);
>
> if (!ret) {
> if (vol_args->flags & BTRFS_DEVICE_SPEC_BY_ID)
> @@ -3133,11 +3127,6 @@ static long btrfs_ioctl_rm_dev(struct file *file, void __user *arg)
> if (ret)
> return ret;
>
> - if (test_and_set_bit(BTRFS_FS_EXCL_OP, &fs_info->flags)) {
> - ret = BTRFS_ERROR_DEV_EXCL_RUN_IN_PROGRESS;
> - goto out_drop_write;
> - }
> -
> vol_args = memdup_user(arg, sizeof(*vol_args));
> if (IS_ERR(vol_args)) {
> ret = PTR_ERR(vol_args);
> @@ -3151,8 +3140,6 @@ static long btrfs_ioctl_rm_dev(struct file *file, void __user *arg)
> btrfs_info(fs_info, "disk deleted %s", vol_args->name);
> kfree(vol_args);
> out:
> - clear_bit(BTRFS_FS_EXCL_OP, &fs_info->flags);
> -out_drop_write:
> mnt_drop_write_file(file);
>
> return ret;
> diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
> index b6757b53c297..9cfac177214f 100644
> --- a/fs/btrfs/volumes.c
> +++ b/fs/btrfs/volumes.c
> @@ -1951,6 +1951,9 @@ int btrfs_rm_device(struct btrfs_fs_info *fs_info, const char *device_path,
> u64 num_devices;
> int ret = 0;
>
> + if (test_and_set_bit(BTRFS_FS_EXCL_OP, &fs_info->flags))
> + return BTRFS_ERROR_DEV_EXCL_RUN_IN_PROGRESS;
> +
> mutex_lock(&uuid_mutex);
>
> num_devices = fs_devices->num_devices;
> @@ -2069,6 +2072,7 @@ int btrfs_rm_device(struct btrfs_fs_info *fs_info, const char *device_path,
>
> out:
> mutex_unlock(&uuid_mutex);
> + clear_bit(BTRFS_FS_EXCL_OP, &fs_info->flags);
> return ret;
>
> error_undo:
>
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