This adds a new %P variable to be used in core_pattern. This variable contains the global PID (PID in the init namespace) as %p contains the PID in the current namespace which isn't always what we want. The main use for this is to make it easier to handle crashes that happened within a container. With that new variables it's possible to have the crashes dumped into the container or forwarded to the host with the right PID (from the host's point of view). Reported-by: Hans Feldt <hans.feldt@xxxxxxxxxxxx> Cc: Alexander Viro <viro@xxxxxxxxxxxxxxxxxx> Cc: Eric W. Biederman <ebiederm@xxxxxxxxxxxx> Cc: Andy Whitcroft <apw@xxxxxxxxxxxxx> Acked-by: Serge E. Hallyn <serge.hallyn@xxxxxxxxxx> Signed-off-by: Stéphane Graber <stgraber@xxxxxxxxxx> --- Documentation/sysctl/kernel.txt | 1 + fs/coredump.c | 5 +++++ 2 files changed, 6 insertions(+) diff --git a/Documentation/sysctl/kernel.txt b/Documentation/sysctl/kernel.txt index ccd4258..833026d 100644 --- a/Documentation/sysctl/kernel.txt +++ b/Documentation/sysctl/kernel.txt @@ -182,6 +182,7 @@ core_pattern is used to specify a core dumpfile pattern name. %<NUL> '%' is dropped %% output one '%' %p pid + %P global pid (init PID namespace) %u uid %g gid %d dump mode, matches PR_SET_DUMPABLE and diff --git a/fs/coredump.c b/fs/coredump.c index c647965..528c6fc 100644 --- a/fs/coredump.c +++ b/fs/coredump.c @@ -186,6 +186,11 @@ static int format_corename(struct core_name *cn, struct coredump_params *cprm) err = cn_printf(cn, "%d", task_tgid_vnr(current)); break; + /* global pid */ + case 'P': + err = cn_printf(cn, "%d", + task_tgid_nr(current)); + break; /* uid */ case 'u': err = cn_printf(cn, "%d", cred->uid); -- 1.8.1.2 -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
