On Thu, Apr 28, 2016 at 7:28 AM, Manoj Rao <linux@xxxxxxxxxxxxxxxx> wrote: > Hi All, > > I'm looking for a way to get a filename associated with a given physical > block (ideally what I'd like is a mapping of filename <=> all the allocated > blocks for this file). If you have not done already, this could be a good starting point. Look at FIBMAP IOCTL. Here is one usage of FIEMAP, demonstrated via hdparam. # hdparm --fibmap <your file name> > > Is there a recommended way to do this already in kernel? if not, then where > should I start looking to add changes? Not sure about what would be the Recommended method. But this could be done in user-space vs doing it in kernel space. For example, consider cases like single file restore - there will be a requirement to figure out the logical - physical block allocation for a file which could be achieved through... Read superblock Read dentry - Home into the required inode (file) Read inode - to figure out the location of block. Note: This is not generic - and would require changes as layout is different for filesystems. Thanks Arshad _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
