NAME

       mountsnoop - Trace mount() and umount() syscalls. Uses Linux eBPF/bcc.

SYNOPSIS

       mountsnoop

DESCRIPTION

       mountsnoop  traces the mount() and umount() syscalls, showing which processes are mounting and unmounting
       filesystems in what mount namespaces. This can be useful for troubleshooting system and container setup.

       This works by tracing the kernel sys_mount() and sys_umount() functions using dynamic tracing,  and  will
       need updating to match any changes to this function.

       This makes use of a Linux 4.8 feature (bpf_get_current_task()).

       Since this uses BPF, only the root user can use this tool.

REQUIREMENTS

       CONFIG_BPF and bcc.

FIELDS

       COMM   Process name

       PID    Process ID

       TID    Thread ID

       MNT_NS Mount namespace inode number

       CALL   System call, arguments, and return value

OVERHEAD

       This  traces the kernel mount and umount functions and prints output for each event. As the rate of these
       calls is generally expected to be very low, the overhead is also  expected  to  be  negligible.  If  your
       system calls mount() and umount() at a high rate, then test and understand overhead before use.

SOURCE

       This is from bcc.

              https://github.com/iovisor/bcc

       Also  look  in  the bcc distribution for a companion _examples.txt file containing example usage, output,
       and commentary for this tool.

OS

       Linux

STABILITY

       Unstable - in development.

AUTHOR

       Omar Sandoval

SEE ALSO

       mount(2) umount(2)

USER COMMANDS                                      2016-10-14                                      mountsnoop(8)