On Fri, Jun 13, 2014 at 04:21:09PM +0800, xinxin shu wrote: > Hi all, > > > > Recently , I collect blktrace data for xfs , I want to find the > corresponding file/directory through the offset , is there any way to do > this ? any tips will appreciate. thx There isn't any easy way that I'm aware of to take a raw block number and map it back to the owner. The global space trees account for free space only and all allocated space is tracked in the block maps of individual inodes. You can obtain the extent mappings for a file via xfs_bmap, but that alone isn't useful if you don't know what file you're looking for. You could run a find/xfs_bmap through the entire fs and sift through the output. If that's a lot of data and this is something you need to do repeatedly, a supporting script might be a good idea. For example, you could probably create a program that creates a sorted index of every allocated extent mapped to inode number. Alternatively, a script that takes a block number parameter and searches through the extents for a range that includes it might be more simple. You'll also want to be cognizant of various metadata blocks (i.e., inode xattr blocks, btree blocks, internal md for ag's, log blocks if internal, etc.). Brian > _______________________________________________ > xfs mailing list > xfs@xxxxxxxxxxx > http://oss.sgi.com/mailman/listinfo/xfs _______________________________________________ xfs mailing list xfs@xxxxxxxxxxx http://oss.sgi.com/mailman/listinfo/xfs
