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

[Qian Cai]

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