pstore: Add pmsg - user-space accessible pstore object
A secured user-space accessible pstore object. Writes
to /dev/pmsg0 are appended to the buffer, on reboot
the persistent contents are available in
/sys/fs/pstore/pmsg-ramoops-[ID].
One possible use is syslogd, or other daemon, can
write messages, then on reboot provides a means to
triage user-space activities leading up to a panic
as a companion to the pstore dmesg or console logs.
Signed-off-by: Mark Salyzyn <salyzyn@android.com>
Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Tony Luck <tony.luck@intel.com>
diff --git a/fs/pstore/inode.c b/fs/pstore/inode.c
index d69586f..b32ce53 100644
--- a/fs/pstore/inode.c
+++ b/fs/pstore/inode.c
@@ -361,6 +361,9 @@
scnprintf(name, sizeof(name), "powerpc-common-%s-%lld",
psname, id);
break;
+ case PSTORE_TYPE_PMSG:
+ scnprintf(name, sizeof(name), "pmsg-%s-%lld", psname, id);
+ break;
case PSTORE_TYPE_UNKNOWN:
scnprintf(name, sizeof(name), "unknown-%s-%lld", psname, id);
break;
