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In encoded read/write with uring cmd, it uses import_iovec without supporting fixed buffer. btrfs_using_import_iovec() could use fixed buffer if cmd flags has IORING_URING_CMD_FIXED. Signed-off-by: Sidong Yang Reviewed-by: Pavel Begunkov --- fs/btrfs/ioctl.c | 34 +++++++++++++++++++++++++--------- 1 file changed, 25 insertions(+), 9 deletions(-) diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index 6c18bad53cd3..e5b4af41ca6b 100644 --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -4802,7 +4802,29 @@ struct btrfs_uring_encoded_data { struct iov_iter iter; }; =20 -static int btrfs_uring_encoded_read(struct io_uring_cmd *cmd, unsigned int= issue_flags) +static int btrfs_uring_import_iovec(struct io_uring_cmd *cmd, + unsigned int issue_flags, int rw) +{ + struct btrfs_uring_encoded_data *data =3D + io_uring_cmd_get_async_data(cmd)->op_data; + int ret; + + if (cmd->flags & IORING_URING_CMD_FIXED) { + data->iov =3D NULL; + ret =3D io_uring_cmd_import_fixed_vec(cmd, data->args.iov, + data->args.iovcnt, rw, + &data->iter, issue_flags); + } else { + data->iov =3D data->iovstack; + ret =3D import_iovec(rw, data->args.iov, data->args.iovcnt, + ARRAY_SIZE(data->iovstack), &data->iov, + &data->iter); + } + return ret; +} + +static int btrfs_uring_encoded_read(struct io_uring_cmd *cmd, + unsigned int issue_flags) { size_t copy_end_kernel =3D offsetofend(struct btrfs_ioctl_encoded_io_args= , flags); size_t copy_end; @@ -4874,10 +4896,7 @@ static int btrfs_uring_encoded_read(struct io_uring_= cmd *cmd, unsigned int issue goto out_acct; } =20 - data->iov =3D data->iovstack; - ret =3D import_iovec(ITER_DEST, data->args.iov, data->args.iovcnt, - ARRAY_SIZE(data->iovstack), &data->iov, - &data->iter); + ret =3D btrfs_uring_import_iovec(cmd, issue_flags, ITER_DEST); if (ret < 0) goto out_acct; =20 @@ -5022,10 +5041,7 @@ static int btrfs_uring_encoded_write(struct io_uring= _cmd *cmd, unsigned int issu if (data->args.len > data->args.unencoded_len - data->args.unencoded_off= set) goto out_acct; =20 - data->iov =3D data->iovstack; - ret =3D import_iovec(ITER_SOURCE, data->args.iov, data->args.iovcnt, - ARRAY_SIZE(data->iovstack), &data->iov, - &data->iter); + ret =3D btrfs_uring_import_iovec(cmd, issue_flags, ITER_SOURCE); if (ret < 0) goto out_acct; =20 --=20 2.43.0