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pstore: Map PSTORE_TYPE_* to strings

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In later patches we will need to map types to names, so create a
constant table for that which can also be used in different parts of
old and new code. This saves the type in the PRZ which will be useful
in later patches.

Instead of having an explicit PSTORE_TYPE_UNKNOWN, just use ..._MAX.

This includes removing the now redundant filename templates which can use
a single format string. Also, there's no reason to limit the "is it still
compressed?" test to only PSTORE_TYPE_DMESG when building the pstorefs
filename. Records are zero-initialized, so a backend would need to have
explicitly set compressed=1.

Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org>
Co-developed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
This commit is contained in:
Joel Fernandes (Google) 2018-11-03 16:38:16 -07:00 • committed by Kees Cook
parent 4af62a6423
commit f0f23e5469
6 changed files with 62 additions and 52 deletions
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3
include/linux/pstore_ram.h
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@ -22,6 +22,7 @@
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/pstore.h>
#include <linux/types.h>
/*
@ -54,6 +55,7 @@ struct persistent_ram_ecc_info {
* @paddr: physical address of the mapped RAM area
* @size: size of mapping
* @label: unique name of this PRZ
* @type: frontend type for this PRZ
* @flags: holds PRZ_FLAGS_* bits
*
* @buffer_lock:
@ -88,6 +90,7 @@ struct persistent_ram_zone {
size_t size;
void *vaddr;
char *label;
enum pstore_type_id type;
u32 flags;
raw_spinlock_t buffer_lock;