[PATCH 1/8] pstore: add flags

[dragos.tatulea@intel.com]

From: Adrian Hunter <adrian.hunter@intel.com>

Let the back end tweak pstore behaviour.  Flags added are:

	PSTORE_NO_HEADINGS

		Omit pstore heading lines from dumped data

	PSTORE_MAX_KMSG_BYTES

		Default kmsg_bytes to ULONG_MAX

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
--
 fs/pstore/platform.c   |    9 ++++++++-
 include/linux/pstore.h |    4 ++++
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/fs/pstore/platform.c b/fs/pstore/platform.c
index a40da07..c4ea778 100644
-- a/fs/pstore/platform.c
++ b/fs/pstore/platform.c
@@ -128,7 +128,11 @@ static void pstore_dump(struct kmsg_dumper *dumper,
 		size_t len;
 
 		dst = psinfo->buf;
		hsize = sprintf(dst, "%s#%d Part%d\n", why, oopscount, part);
		if (psinfo->flags & PSTORE_NO_HEADINGS)
			hsize = 0;
		else
			hsize = sprintf(dst, "%s#%d Part%d\n", why, oopscount,
					part);
 		size = psinfo->bufsize - hsize;
 		dst += hsize;
 
@@ -237,6 +241,9 @@ int pstore_register(struct pstore_info *psi)
 		return -EINVAL;
 	}
 
	if (psinfo->flags & PSTORE_MAX_KMSG_BYTES)
		kmsg_bytes = ULONG_MAX;

 	if (pstore_is_mounted())
 		pstore_get_records(0);
 
diff --git a/include/linux/pstore.h b/include/linux/pstore.h
index ee3034a..55ab23f 100644
-- a/include/linux/pstore.h
++ b/include/linux/pstore.h
@@ -40,9 +40,13 @@ enum pstore_type_id {
 
 struct module;
 
#define PSTORE_NO_HEADINGS	BIT(0)
#define PSTORE_MAX_KMSG_BYTES	BIT(1)

 struct pstore_info {
 	struct module	*owner;
 	char		*name;
	unsigned int	flags;
 	spinlock_t	buf_lock;	/* serialize access to 'buf' */
 	char		*buf;
 	size_t		bufsize;
- 
1.7.9.5