Re: [LTP] [PATCH V2] open_posix:aio_fsync:14-1: wait for aio_writecompletion

[Wanlong Gao <gaowanlong@cn.fujitsu.com>]

On 07/24/2012 03:16 PM, Nitin Yadav wrote:
> Hi Wanlong,
>  Even I am getting error io_fsync write: Invalid argument, while running
> io test cases on linux 3.2 kernel.Below are the outputs for error.
> 
> aio02/aio_tio    0  TINFO  :  Running test 1
> 
> aio02/aio_tio    0  TINFO  :  Running test 2
> 
> aio02/aio_tio    0  TINFO  :  Running test 3
> 
> aio02/aio_tio    0  TINFO  :  Running test 4
> 
> aio02/aio_tio    0  TINFO  :  Running test 5
> 
> aio02/aio_tio    0  TINFO  :  Running test 6
> 
> aio02/aio_tio    0  TINFO  :  Running test 7
> 
> io_fsync write: Invalid argument 
> 

io_fsync() calls the syscall io_submit().
when doing IO_CMD_FSYNC and IO_CMD_FDSYNC, Linux kernel
will involve the filesystem's aio_fsync and aio_fdsync
operations, and if the filesystem doesn't implement
these two operations, it will return -EINVAL, this is
the error you meet here.
In fact, the syscall io_submit() in kernel is asynchronous,
and the performance is better than adding a outstanding
asynchronous aio_* operations.
In general, this CMD is not implemented in Linux kernel.

Thanks,
Wanlong Gao


> 
> Could you please suggest me some pointer.
> 
> Thanks!
> Nitin yadav
> 
> -----Original Message-----
> From: Wanlong Gao [mailto:gaowanlong@cn.fujitsu.com] 
> Sent: Tuesday, July 24, 2012 11:29 AM
> To: LTP
> Subject: [LTP] [PATCH V2] open_posix:aio_fsync:14-1: wait for
> aio_writecompletion
> 
> Wait for aio_write() completion.
> If aio_fsync() sync the fd without the previous aio_write()
> completion, it will cause Segment Fault.
> 
> Signed-off-by: Wanlong Gao <gaowanlong@cn.fujitsu.com>
> ---
>  .../conformance/interfaces/aio_fsync/14-1.c                    | 10
> ++++++++++
>  1 file changed, 10 insertions(+)
> 
> diff --git
> a/testcases/open_posix_testsuite/conformance/interfaces/aio_fsync/14-1.c
> b/testcases/open_posix_testsuite/conformance/interfaces/aio_fsync/14-1.c
> index a9cd3bf..02ba8a5 100644
> ---
> a/testcases/open_posix_testsuite/conformance/interfaces/aio_fsync/14-1.c
> +++
> b/testcases/open_posix_testsuite/conformance/interfaces/aio_fsync/14-1.c
> @@ -27,6 +27,7 @@ int main()
>  #define BUF_SIZE 111
>  	char buf[BUF_SIZE];
>  	int fd;
> +	int ret;
>  	struct aiocb aiocb_write;
>  	struct aiocb aiocb_fsync;
>  
> @@ -57,6 +58,15 @@ int main()
>  		exit(PTS_FAIL);
>  	}
>  
> +	do {
> +		usleep(10000);
> +		ret = aio_error(&aiocb_write);
> +	} while (ret == EINPROGRESS);
> +	if (ret < 0) {
> +		printf(TNAME " Error at aio_error() : %s\n",
> strerror(ret));
> +		exit(PTS_FAIL);
> +	}
> +
>  	memset(&aiocb_fsync, 0, sizeof(aiocb_fsync));
>  	aiocb_fsync.aio_fildes = fd;
>  
> 


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