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authorLinus Torvalds <torvalds@linux-foundation.org>2012-06-20 15:14:28 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-06-20 15:14:28 -0700
commitfe80352460971de12519bf46ed5ec4235350bcd7 (patch)
tree5ecaa3409b76cb0829f905e5c1ceadf20a29829c /include
parentf8fc0c9a5f7f4f5a3d2e7dd58147e30053cc5dd8 (diff)
parent96c9f05b39a5a3239cf0588cc86a1b95cac652c4 (diff)
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Merge tag 'driver-core-3.5-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
Pull driver core and printk fixes from Greg Kroah-Hartman: "Here are some fixes for 3.5-rc4 that resolve the kmsg problems that people have reported showing up after the printk and kmsg changes went into 3.5-rc1. There are also a smattering of other tiny fixes for the extcon and hyper-v drivers that people have reported. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>" * tag 'driver-core-3.5-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: extcon: max8997: Add missing kfree for info->edev in max8997_muic_remove() extcon: Set platform drvdata in gpio_extcon_probe() and fix irq leak extcon: Fix wrong index in max8997_extcon_cable[] kmsg - kmsg_dump() fix CONFIG_PRINTK=n compilation printk: return -EINVAL if the message len is bigger than the buf size printk: use mutex lock to stop syslog_seq from going wild kmsg - kmsg_dump() use iterator to receive log buffer content vme: change maintainer e-mail address Extcon: Don't try to create duplicate link names driver core: fixup reversed deferred probe order printk: Fix alignment of buf causing crash on ARM EABI Tools: hv: verify origin of netlink connector message
Diffstat (limited to 'include')
-rw-r--r--include/linux/kmsg_dump.h45
1 files changed, 38 insertions, 7 deletions
diff --git a/include/linux/kmsg_dump.h b/include/linux/kmsg_dump.h
index 35f7237ec97..d6bd50110ec 100644
--- a/include/linux/kmsg_dump.h
+++ b/include/linux/kmsg_dump.h
@@ -21,6 +21,7 @@
* is passed to the kernel.
*/
enum kmsg_dump_reason {
+ KMSG_DUMP_UNDEF,
KMSG_DUMP_PANIC,
KMSG_DUMP_OOPS,
KMSG_DUMP_EMERG,
@@ -31,23 +32,37 @@ enum kmsg_dump_reason {
/**
* struct kmsg_dumper - kernel crash message dumper structure
- * @dump: The callback which gets called on crashes. The buffer is passed
- * as two sections, where s1 (length l1) contains the older
- * messages and s2 (length l2) contains the newer.
* @list: Entry in the dumper list (private)
+ * @dump: Call into dumping code which will retrieve the data with
+ * through the record iterator
+ * @max_reason: filter for highest reason number that should be dumped
* @registered: Flag that specifies if this is already registered
*/
struct kmsg_dumper {
- void (*dump)(struct kmsg_dumper *dumper, enum kmsg_dump_reason reason,
- const char *s1, unsigned long l1,
- const char *s2, unsigned long l2);
struct list_head list;
- int registered;
+ void (*dump)(struct kmsg_dumper *dumper, enum kmsg_dump_reason reason);
+ enum kmsg_dump_reason max_reason;
+ bool active;
+ bool registered;
+
+ /* private state of the kmsg iterator */
+ u32 cur_idx;
+ u32 next_idx;
+ u64 cur_seq;
+ u64 next_seq;
};
#ifdef CONFIG_PRINTK
void kmsg_dump(enum kmsg_dump_reason reason);
+bool kmsg_dump_get_line(struct kmsg_dumper *dumper, bool syslog,
+ char *line, size_t size, size_t *len);
+
+bool kmsg_dump_get_buffer(struct kmsg_dumper *dumper, bool syslog,
+ char *buf, size_t size, size_t *len);
+
+void kmsg_dump_rewind(struct kmsg_dumper *dumper);
+
int kmsg_dump_register(struct kmsg_dumper *dumper);
int kmsg_dump_unregister(struct kmsg_dumper *dumper);
@@ -56,6 +71,22 @@ static inline void kmsg_dump(enum kmsg_dump_reason reason)
{
}
+static inline bool kmsg_dump_get_line(struct kmsg_dumper *dumper, bool syslog,
+ const char *line, size_t size, size_t *len)
+{
+ return false;
+}
+
+static inline bool kmsg_dump_get_buffer(struct kmsg_dumper *dumper, bool syslog,
+ char *buf, size_t size, size_t *len)
+{
+ return false;
+}
+
+static inline void kmsg_dump_rewind(struct kmsg_dumper *dumper)
+{
+}
+
static inline int kmsg_dump_register(struct kmsg_dumper *dumper)
{
return -EINVAL;