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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/inode.c
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/inode.c')
-rw-r--r--fs/pstore/inode.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/pstore/inode.c b/fs/pstore/inode.c
index d69586f09ffd..b32ce53d24ee 100644
--- a/fs/pstore/inode.c
+++ b/fs/pstore/inode.c
@@ -361,6 +361,9 @@ int pstore_mkfile(enum pstore_type_id type, char *psname, u64 id, int count,
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;