On Wed, Aug 30, 2017 at 10:24:48AM -0700, Yingyi Luo wrote:
> From: yingyil <ying...@google.com>
>
> A convert parameter is added as a flag to indicate if btrfs_link_subvol()
> is used for btrfs-convert. The change cascades down to the callchain.
>
> Signed-off-by: yingyil <ying...@google.com>
> ---
> v2: Added a flag for btrfs_link_subvol() function so that it can be used in a
> more general way. For example, if mkfs calls this function, it will return
> directly with an error code if the subvolume creation fails.
>
> convert/main.c | 2 +-
> utils.c | 25 +++++++++++++++----------
> utils.h | 2 +-
> 3 files changed, 17 insertions(+), 12 deletions(-)
>
> diff --git a/convert/main.c b/convert/main.c
> index 8f7fec25..19a60782 100644
> --- a/convert/main.c
> +++ b/convert/main.c
> @@ -1192,7 +1192,7 @@ static int do_convert(const char *devname, u32
> convert_flags, u32 nodesize,
> task_deinit(ctx.info);
> }
>
> - image_root = btrfs_link_subvol(root, subvol_name,
> CONV_IMAGE_SUBVOL_OBJECTID);
> + image_root = btrfs_link_subvol(root, subvol_name,
> CONV_IMAGE_SUBVOL_OBJECTID, 1);
> if (!image_root) {
> error("unable to link subvolume %s", subvol_name);
> goto fail;
> diff --git a/utils.c b/utils.c
> index 32382328..20ea9e74 100644
> --- a/utils.c
> +++ b/utils.c
> @@ -2576,7 +2576,7 @@ void btrfs_config_init(void)
> }
>
> struct btrfs_root *btrfs_link_subvol(struct btrfs_root *root,
> - const char *base, u64 root_objectid)
> + const char *base, u64 root_objectid, int convert)
> {
> struct btrfs_trans_handle *trans;
> struct btrfs_fs_info *fs_info = root->fs_info;
> @@ -2642,16 +2642,21 @@ struct btrfs_root *btrfs_link_subvol(struct
> btrfs_root *root,
> key.type = BTRFS_ROOT_ITEM_KEY;
>
> memcpy(buf, base, len);
> - for (i = 0; i < 1024; i++) {
> - ret = btrfs_insert_dir_item(trans, root, buf, len, dirid,
> - &key, BTRFS_FT_DIR, index);
> - if (ret != -EEXIST)
> - break;
> - len = snprintf(buf, ARRAY_SIZE(buf), "%s%d", base, i);
> - if (len < 1 || len > BTRFS_NAME_LEN) {
> - ret = -EINVAL;
> - break;
> + if (convert) {
> + for (i = 0; i < 1024; i++) {
> + ret = btrfs_insert_dir_item(trans, root, buf, len,
> dirid,
> + &key, BTRFS_FT_DIR, index);
> + if (ret != -EEXIST)
> + break;
> + len = snprintf(buf, ARRAY_SIZE(buf), "%s%d", base, i);
> + if (len < 1 || len > BTRFS_NAME_LEN) {
> + ret = -EINVAL;
> + break;
> + }
> }
> + } else {
> + ret = btrfs_insert_dir_item(trans, root, buf, len, dirid, &key,
> + BTRFS_FT_DIR, index);
> }
> if (ret)
> goto fail;
> diff --git a/utils.h b/utils.h
> index 886590fd..28aa8373 100644
> --- a/utils.h
> +++ b/utils.h
> @@ -171,6 +171,6 @@ unsigned int rand_range(unsigned int upper);
> void init_rand_seed(u64 seed);
>
> struct btrfs_root *btrfs_link_subvol(struct btrfs_root *root, const char
> *base,
> - u64 root_objectid);
> + u64 root_objectid, int convert);
Please make it 'bool', otherwise ok.
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