On Wed, Oct 08, 2014 at 01:31:24PM +0800, Wang Shilong wrote: > Cc list > > > On Wed, Oct 08, 2014 at 06:35:22AM -0400, Wang Shilong wrote: > >>> Signed-off-by: Wang Shilong <wangshilong1...@gmail.com> > >>> --- > >>> i didn't find a way to remove filefrag here, but let us > >>> use macro firstly... > >> > >> YOu shoul dbe able to use fiemap to calculate the same output. > >> i.e. _check_file_extents() outputs a strings of the format > >> #physical#length#logical#flags and this is then cut up later > >> later by the test. fiemap outputs the same information, > >> it just requires slightly different processing via the > >> _filter_extents function to munge it into the same format… > > > > I supposed there are some differences between fiemap and filefrag: > > > > [root@vm01 mnt]# filefrag -v data > > Filesystem type is: 9123683e > > File size of data is 1024 (1 block of 4096 bytes) > > ext: logical_offset: physical_offset: length: expected: flags: > > 0: 0.. 4095: 0.. 4095: 4096: > > not_aligned,inline,eof > > data: 1 extent found > > > > [root@vm01 mnt]# xfs_io -c fiemap data > > data: > > 0: [0..7]: 0..7
Of course. Units, for one: the output of filefrag is in bytes, while fiemap is in 512 byte blocks. And fiemap needs the "-v" option to output the flag state. Same information, different presentation. Cheers, Dave. -- Dave Chinner da...@fromorbit.com -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
