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authorLuck, Tony <tony.luck@intel.com>2013-12-18 15:17:10 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2013-12-20 13:12:01 -0800
commitdf36ac1bc2a166eef90785d584e4cfed6f52bd32 (patch)
tree024eb6ee8e997889d9cd31ed97503a158ebf898b /include
parenteaadcfeb31e959028dfa2cc48741e126e3e15b28 (diff)
downloadlinux-df36ac1bc2a166eef90785d584e4cfed6f52bd32.tar.bz2
pstore: Don't allow high traffic options on fragile devices
Some pstore backing devices use on board flash as persistent storage. These have limited numbers of write cycles so it is a poor idea to use them from high frequency operations. Signed-off-by: Tony Luck <tony.luck@intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/pstore.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/pstore.h b/include/linux/pstore.h
index abd437d0a8a7..ece0c6bbfcc5 100644
--- a/include/linux/pstore.h
+++ b/include/linux/pstore.h
@@ -51,6 +51,7 @@ struct pstore_info {
char *buf;
size_t bufsize;
struct mutex read_mutex; /* serialize open/read/close */
+ int flags;
int (*open)(struct pstore_info *psi);
int (*close)(struct pstore_info *psi);
ssize_t (*read)(u64 *id, enum pstore_type_id *type,
@@ -70,6 +71,8 @@ struct pstore_info {
void *data;
};
+#define PSTORE_FLAGS_FRAGILE 1
+
#ifdef CONFIG_PSTORE
extern int pstore_register(struct pstore_info *);
extern bool pstore_cannot_block_path(enum kmsg_dump_reason reason);