[LTP] [PATCH v1 0/4] *** Add LOOP_CONFIGURE ioctl test ***

[Yang Xu]

Hi
ping.

> Since kernel commit[1], it has added LOOP_CONFIGURE ioctl test.
>  From this commit, loop_set_fd calls loop_configure with zero
> loop_config.
> 
> struct loop_config {
> 	__u32			fd;
> 	__u32                   block_size;
> 	struct loop_info64	info;
> 	__u64			__reserved[8];
> }
> 
> In addition to doing what LOOP_SET_STATUS can do, LOOP_CONFIGURE can
> also be used to:
> - Set the correct block size immediately by setting
>    loop_config.block_size (I test this in ioctl_loop08.c, like old
> ioctl_loop06.c)
> - Explicitly request direct I/O mode by setting LO_FLAGS_DIRECT_IO
>    in loop_config.info.lo_flags (I test this in ioctl_loop09.c, like old
> ioctl_loop05.c)
> - Explicitly request read-only mode by setting LO_FLAGS_READ_ONLY
>    in loop_config.info.lo_flags (I test this in old ioctl_loop02.c)
> 
> 
> [1]https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3448914e8cc550ba792d4ccc74471d1ca4293a
> 
> Yang Xu (4):
>    lapi: Add fallback for LOOP_CONFIGURE ioctl and struct loop_config
>    syscalls/ioctl_loop02: Using LOOP_CONFIGURE to set read_only
>    syscalls/ioctl_loop08: Add LOOP_CONFIGURE error test with invalid
>      block size
>    syscalls/ioctl_loop09: Add LOOP_CONFIGURE ioctl test with direct I/O
>      flag
> 
>   configure.ac                                  |   1 +
>   include/lapi/loop.h                           |  23 +++
>   runtest/syscalls                              |   2 +
>   testcases/kernel/syscalls/ioctl/.gitignore    |   2 +
>   .../kernel/syscalls/ioctl/ioctl_loop02.c      |  53 ++++--
>   .../kernel/syscalls/ioctl/ioctl_loop08.c      | 101 ++++++++++++
>   .../kernel/syscalls/ioctl/ioctl_loop09.c      | 151 ++++++++++++++++++
>   7 files changed, 324 insertions(+), 9 deletions(-)
>   create mode 100644 testcases/kernel/syscalls/ioctl/ioctl_loop08.c
>   create mode 100644 testcases/kernel/syscalls/ioctl/ioctl_loop09.c
>