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| author | Stéphane Graber <stgraber@ubuntu.com> | 2013-09-11 14:24:32 -0700 |
|---|---|---|
| committer | Lee Campbell <leecam@google.com> | 2015-10-12 13:26:11 -0700 |
| commit | be333f960142233ce87d6794753ddab552357dec (patch) | |
| tree | 6e3dc0e1c11338eba42f861d1f94904028b7cc8b | |
| parent | ff16b6254f760ec940d069874265cd83474ad41a (diff) | |
| download | intel-be333f960142233ce87d6794753ddab552357dec.tar.gz | |
coredump: add new %P variable in core_pattern
Add 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).
Signed-off-by: Stéphane Graber <stgraber@ubuntu.com>
Reported-by: Hans Feldt <hans.feldt@ericsson.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Eric W. Biederman <ebiederm@xmission.com>
Cc: Andy Whitcroft <apw@canonical.com>
Acked-by: Serge E. Hallyn <serge.hallyn@ubuntu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
(cherry picked from commit 240ba92d4a528d7bc3fd08ad52081e108382809c)
Change-Id: I7b2530f271ed9c96b67cdb77777f8ad64f856a88
| -rw-r--r-- | Documentation/sysctl/kernel.txt | 1 | ||||
| -rw-r--r-- | fs/coredump.c | 5 |
2 files changed, 6 insertions, 0 deletions
diff --git a/Documentation/sysctl/kernel.txt b/Documentation/sysctl/kernel.txt index 8d90c42e5db..9b9d019885a 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 1d402ce5b72..c9625799580 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); |