#! /usr/bin/env stap // Copyright (c) 2009, 2015 Red Hat Inc. // // This file is part of systemtap, and is free software. You can // redistribute it and/or modify it under the terms of the GNU General // Public License (GPL); either version 2, or (at your option) any // later version. probe kernel.function("autofs4_lookup") !, module("autofs4").function("autofs4_lookup") { /* * Don't log automounts travels in its own directory hierarchy, as * they are treated differently, and certainly not something that is * useful for admins to see. */ if (!isinstr(execname(), "automount")) { printf("%s process %s[%d] looking up %s%s\n", ctime(gettimeofday_s()), execname(), pid(), (@defined($nd) ? fullpath_struct_nameidata($nd) : inode_name($dir)), d_name($dentry)); } } probe kernel.function("autofs4_follow_link") !, module("autofs4").function("autofs4_follow_link") { if (!isinstr(execname(), "automount")) { /* * dentry->d_name will be '/' for the mount trigger. Thus, * the path that the trigger lives on is one level up the * directory stack, and the root of that is yet another level * up. */ printf("%s process %s[%d] following mount trigger %s\n", ctime(gettimeofday_s()), execname(), pid(), (@defined($nd) ? d_path($nd) : reverse_path_walk($dentry))) } } probe kernel.function("autofs4_expire_direct").return !, module("autofs4").function("autofs4_expire_direct").return ? { if ($return != 0) { if (@defined($mnt->mnt_mountpoint)) { relative_path = reverse_path_walk(@entry($mnt->mnt_mountpoint)) root_path = sprintf("/%s", reverse_path_walk(@entry($mnt->mnt_parent->mnt_mountpoint))) } else { relative_path = "" root_path = task_dentry_path(task_current(), @entry($mnt->mnt_root), @entry($mnt)) } printf("%s process %s[%d] expiring direct mount %s/%s\n", ctime(gettimeofday_s()), execname(), pid(), root_path, relative_path) } } /* probe module("autofs4").statement("autofs4_expire_direct@fs/autofs4/expire.c+17").nearest ? { relative_path = reverse_path_walk($mnt->mnt_mountpoint) root_path = reverse_path_walk($mnt->mnt_parent->mnt_mountpoint) printf("%s process %s[%d] expiring direct mount /%s/%s\n", ctime(gettimeofday_s()), execname(), pid(), root_path, relative_path) } */ probe kernel.function("autofs4_expire_indirect").return !, module("autofs4").function("autofs4_expire_indirect").return { if ($return != 0) { relative_path = reverse_path_walk($return) root_path = (@defined($mnt->mnt_root) ? task_dentry_path(task_current(), @entry($mnt->mnt_root), @entry($mnt)) : reverse_path_walk(@entry($mnt->mnt_mountpoint))) printf("%s process %s[%d] expiring indirect mount %s/%s\n", ctime(gettimeofday_s()), execname(), pid(), root_path, relative_path) } } /* * The struct dentry's name may be '/' if this is a mount trigger, which * is not really something that is useful to print out. Instead, we just * indicate whether a mount or umount succeeded or failed. Coupled with the * messages printed out when looking up a directory and traversing a symlink, * this should be relatively easy to correlate to the appropriate directory. */ probe kernel.function("autofs4_wait").return !, module("autofs4").function("autofs4_wait").return { if (@entry($notify) > 0) { dname = d_name(@entry($dentry)) printf("%s %s of %s %s\n", ctime(gettimeofday_s()), (@entry($notify)==1?"mount":"unmount"), dname, $return == 0?"succeeded":"failed") } }