On Thu, May 21 2020, Craig Small wrote: > Hi, > I'm the author of the psmisc programs that include things like killall and fuser. I have a problem with finding files open on NFS mounts from the same server. The issue is at https://gitlab.com/psmisc/psmisc/-/issues/10 > > The way fuser does its job is to find the mounts you specify and collect the device IDs, then scans all /proc/<PID/fd/* for matching devices. However, NFS mounts from the same server have the same device ID so fuser reports every mount has the same file opened. > > Putting it another way, if I said "here is file /proc/<PID>/fd/3, dereference the symlink and tell me which of these two NFS mounts from the same server it comes from?" how would you do it? > A simple string match (/mnt/a vs /mnt/b) does not work because you can have symlinks across mounts. I would examine /proc/<PID>/fdinfo/3 and extract the 'mnt_id:' number, then look for that (as the first field) in /proc/<PID>/mountinfo. NeilBrown > > Any help here would be appreciated. I'm not subscribed to the list so hopefully, this makes it through whatever filters there are and please CC me on replies. > > - Craig
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