mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-30 16:13:54 +08:00
dd48c085c1
init_fault_attr_dentries() is used to export fault_attr via debugfs. But it can only export it in debugfs root directory. Per Forlin is working on mmc_fail_request which adds support to inject data errors after a completed host transfer in MMC subsystem. The fault_attr for mmc_fail_request should be defined per mmc host and export it in debugfs directory per mmc host like /sys/kernel/debug/mmc0/mmc_fail_request. init_fault_attr_dentries() doesn't help for mmc_fail_request. So this introduces fault_create_debugfs_attr() which is able to create a directory in the arbitrary directory and replace init_fault_attr_dentries(). [akpm@linux-foundation.org: extraneous semicolon, per Randy] Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Tested-by: Per Forlin <per.forlin@linaro.org> Cc: Jens Axboe <axboe@kernel.dk> Cc: Christoph Lameter <cl@linux-foundation.org> Cc: Pekka Enberg <penberg@kernel.org> Cc: Matt Mackall <mpm@selenic.com> Cc: Randy Dunlap <rdunlap@xenotime.net> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
70 lines
1.7 KiB
C
70 lines
1.7 KiB
C
#ifndef _LINUX_FAULT_INJECT_H
|
|
#define _LINUX_FAULT_INJECT_H
|
|
|
|
#ifdef CONFIG_FAULT_INJECTION
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/debugfs.h>
|
|
#include <linux/atomic.h>
|
|
|
|
/*
|
|
* For explanation of the elements of this struct, see
|
|
* Documentation/fault-injection/fault-injection.txt
|
|
*/
|
|
struct fault_attr {
|
|
unsigned long probability;
|
|
unsigned long interval;
|
|
atomic_t times;
|
|
atomic_t space;
|
|
unsigned long verbose;
|
|
u32 task_filter;
|
|
unsigned long stacktrace_depth;
|
|
unsigned long require_start;
|
|
unsigned long require_end;
|
|
unsigned long reject_start;
|
|
unsigned long reject_end;
|
|
|
|
unsigned long count;
|
|
};
|
|
|
|
#define FAULT_ATTR_INITIALIZER { \
|
|
.interval = 1, \
|
|
.times = ATOMIC_INIT(1), \
|
|
.require_end = ULONG_MAX, \
|
|
.stacktrace_depth = 32, \
|
|
.verbose = 2, \
|
|
}
|
|
|
|
#define DECLARE_FAULT_ATTR(name) struct fault_attr name = FAULT_ATTR_INITIALIZER
|
|
int setup_fault_attr(struct fault_attr *attr, char *str);
|
|
bool should_fail(struct fault_attr *attr, ssize_t size);
|
|
|
|
#ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
|
|
|
|
struct dentry *fault_create_debugfs_attr(const char *name,
|
|
struct dentry *parent, struct fault_attr *attr);
|
|
|
|
#else /* CONFIG_FAULT_INJECTION_DEBUG_FS */
|
|
|
|
static inline struct dentry *fault_create_debugfs_attr(const char *name,
|
|
struct dentry *parent, struct fault_attr *attr)
|
|
{
|
|
return ERR_PTR(-ENODEV);
|
|
}
|
|
|
|
#endif /* CONFIG_FAULT_INJECTION_DEBUG_FS */
|
|
|
|
#endif /* CONFIG_FAULT_INJECTION */
|
|
|
|
#ifdef CONFIG_FAILSLAB
|
|
extern bool should_failslab(size_t size, gfp_t gfpflags, unsigned long flags);
|
|
#else
|
|
static inline bool should_failslab(size_t size, gfp_t gfpflags,
|
|
unsigned long flags)
|
|
{
|
|
return false;
|
|
}
|
|
#endif /* CONFIG_FAILSLAB */
|
|
|
|
#endif /* _LINUX_FAULT_INJECT_H */
|