[LTP] [PATCH] diotest4: Fix false postives on FUSE

[Cyril Hrubis]

Hi!
> It looks like FUSE does not support the unaligned IO, because it does
> not directly backed by a block device. Therefore, in fuse_direct_IO(),
> there is no checking of unaligned IO to return -EINVAL like other
> filesystems from iomap_dio_bio_actor().
> 
> diotest4    3  TFAIL  :  diotest4.c:114: read allows odd count. returns 1: Success
> diotest4    4  TFAIL  :  diotest4.c:129: write allows odd count.returns 1: Success
> diotest4    5  TFAIL  :  diotest4.c:180: Odd count of read and write
> ...
> diotest4   16  TFAIL  :  diotest4.c:114: read allows  nonaligned buf. returns 4096: Success
> diotest4   17  TFAIL  :  diotest4.c:129: write allows  nonaligned buf.returns 4096: Success
> diotest4   18  TFAIL  :  diotest4.c:180: read, write with non-aligned buffer
> 
> Signed-off-by: Qian Cai <cai@redhat.com>
> ---
>  include/tst_fs.h                         | 45 ++++++++++++------------
>  lib/tst_fs_type.c                        |  2 ++
>  testcases/kernel/io/direct_io/diotest4.c |  2 ++
>  3 files changed, 27 insertions(+), 22 deletions(-)
> 
> diff --git a/include/tst_fs.h b/include/tst_fs.h
> index fc0390582..a44d5e3b2 100644
> --- a/include/tst_fs.h
> +++ b/include/tst_fs.h
> @@ -6,29 +6,30 @@
>  #define TST_FS_H__
>  
>  /* man 2 statfs or kernel-source/include/linux/magic.h */
> -#define TST_BTRFS_MAGIC    0x9123683E
> -#define TST_NFS_MAGIC      0x6969
> -#define TST_RAMFS_MAGIC    0x858458f6
> -#define TST_TMPFS_MAGIC    0x01021994
> -#define TST_V9FS_MAGIC     0x01021997
> -#define TST_XFS_MAGIC      0x58465342
> -#define TST_EXT2_OLD_MAGIC 0xEF51
> +#define TST_BTRFS_MAGIC      0x9123683E
> +#define TST_NFS_MAGIC        0x6969
> +#define TST_RAMFS_MAGIC      0x858458f6
> +#define TST_TMPFS_MAGIC      0x01021994
> +#define TST_V9FS_MAGIC       0x01021997
> +#define TST_XFS_MAGIC        0x58465342
> +#define TST_EXT2_OLD_MAGIC   0xEF51
>  /* ext2, ext3, ext4 have the same magic number */
> -#define TST_EXT234_MAGIC   0xEF53
> -#define TST_MINIX_MAGIC    0x137F
> -#define TST_MINIX_MAGIC2   0x138F
> -#define TST_MINIX2_MAGIC   0x2468
> -#define TST_MINIX2_MAGIC2  0x2478
> -#define TST_MINIX3_MAGIC   0x4D5A
> -#define TST_UDF_MAGIC      0x15013346
> -#define TST_SYSV2_MAGIC    0x012FF7B6
> -#define TST_SYSV4_MAGIC    0x012FF7B5
> -#define TST_UFS_MAGIC      0x00011954
> -#define TST_UFS2_MAGIC     0x19540119
> -#define TST_F2FS_MAGIC     0xF2F52010
> -#define TST_NILFS_MAGIC    0x3434
> -#define TST_EXOFS_MAGIC    0x5DF5
> -#define TST_OVERLAYFS_MAGIC 0x794c7630
> +#define TST_EXT234_MAGIC     0xEF53
> +#define TST_MINIX_MAGIC      0x137F
> +#define TST_MINIX_MAGIC2     0x138F
> +#define TST_MINIX2_MAGIC     0x2468
> +#define TST_MINIX2_MAGIC2    0x2478
> +#define TST_MINIX3_MAGIC     0x4D5A
> +#define TST_UDF_MAGIC        0x15013346
> +#define TST_SYSV2_MAGIC      0x012FF7B6
> +#define TST_SYSV4_MAGIC      0x012FF7B5
> +#define TST_UFS_MAGIC        0x00011954
> +#define TST_UFS2_MAGIC       0x19540119
> +#define TST_F2FS_MAGIC       0xF2F52010
> +#define TST_NILFS_MAGIC      0x3434
> +#define TST_EXOFS_MAGIC      0x5DF5
> +#define TST_OVERLAYFS_MAGIC  0x794c7630
> +#define TST_FUSE_SUPER_MAGIC 0x65735546

The rest of the constants here does not include the SUPER string, please
make it just TST_FUSE_MAGIC.

>  enum {
>  	TST_BYTES = 1,
> diff --git a/lib/tst_fs_type.c b/lib/tst_fs_type.c
> index 1d0ac9669..21eb58a78 100644
> --- a/lib/tst_fs_type.c
> +++ b/lib/tst_fs_type.c
> @@ -84,6 +84,8 @@ const char *tst_fs_type_name(long f_type)
>  		return "EXOFS";
>  	case TST_OVERLAYFS_MAGIC:
>  		return "OVERLAYFS";
> +	case TST_FUSE_SUPER_MAGIC:
> +		return "FUSE"

This does not even compile.

>  	default:
>  		return "Unknown";
>  	}
> diff --git a/testcases/kernel/io/direct_io/diotest4.c
> b/testcases/kernel/io/direct_io/diotest4.c

This part of the patch has been line wrapped by your email client.
Please configure it properly so that it does not mangle patches.

> index bf200cd41..5f866bd93 100644
> --- a/testcases/kernel/io/direct_io/diotest4.c
> +++ b/testcases/kernel/io/direct_io/diotest4.c
> @@ -270,6 +270,7 @@ int main(int argc, char *argv[])
>  	switch (fs_type) {
>  	case TST_NFS_MAGIC:
>  	case TST_BTRFS_MAGIC:
> +	case TST_FUSE_SUPER_MAGIC:
>  		tst_resm(TCONF, "%s supports odd count IO",
>  			 tst_fs_type_name(fs_type));
>  	break;
> @@ -442,6 +443,7 @@ int main(int argc, char *argv[])
>  	switch (fs_type) {
>  	case TST_NFS_MAGIC:
>  	case TST_BTRFS_MAGIC:
> +	case TST_FUSE_SUPER_MAGIC:
>  		tst_resm(TCONF, "%s supports non-aligned buffer",
>  			 tst_fs_type_name(fs_type));
>  	break;

Other than that the patch looks fine.

-- 
Cyril Hrubis
chrubis@suse.cz