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authorMark Salyzyn <salyzyn@android.com>2015-01-17 03:01:10 +0300
committerTony Luck <tony.luck@intel.com>2015-01-17 03:01:10 +0300
commit9d5438f462abd6398cdb7b3211bdcec271873a3b (patch)
treefeb8e50edd4180710602c0f4d2db9d76559da1f8 /fs/pstore/Kconfig
parentf44f96528a8cd4134a4f2c1a9d8c785600aa4888 (diff)
downloadlinux-9d5438f462abd6398cdb7b3211bdcec271873a3b.tar.xz
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>
Diffstat (limited to 'fs/pstore/Kconfig')
-rw-r--r--fs/pstore/Kconfig10
1 files changed, 10 insertions, 0 deletions
diff --git a/fs/pstore/Kconfig b/fs/pstore/Kconfig
index 983d9510becc..916b8e23d968 100644
--- a/fs/pstore/Kconfig
+++ b/fs/pstore/Kconfig
@@ -21,6 +21,16 @@ config PSTORE_CONSOLE
When the option is enabled, pstore will log all kernel
messages, even if no oops or panic happened.
+config PSTORE_PMSG
+ bool "Log user space messages"
+ depends on PSTORE
+ help
+ When the option is enabled, pstore will export a character
+ interface /dev/pmsg0 to log user space messages. On reboot
+ data can be retrieved from /sys/fs/pstore/pmsg-ramoops-[ID].
+
+ If unsure, say N.
+
config PSTORE_FTRACE
bool "Persistent function tracer"
depends on PSTORE