forked from mirrors/linux
6ce2082fd3
The fault-inject.h users across the kernel need to add a lot of #ifdef
CONFIG_FAULT_INJECTION to cater for shortcomings in the header. Make
fault-inject.h self-contained for CONFIG_FAULT_INJECTION=n, and add stubs
for DECLARE_FAULT_ATTR(), setup_fault_attr(), should_fail_ex(), and
should_fail() to allow removal of conditional compilation.
[akpm@linux-foundation.org: repair fallout from no longer including debugfs.h into fault-inject.h]
[akpm@linux-foundation.org: fix drivers/misc/xilinx_tmr_inject.c]
[akpm@linux-foundation.org: Add debugfs.h inclusion to more files, per Stephen]
Link: https://lkml.kernel.org/r/20240813121237.2382534-1-jani.nikula@intel.com
Fixes: 6ff1cb355e ("[PATCH] fault-injection capabilities infrastructure")
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Cc: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Abhinav Kumar <quic_abhinavk@quicinc.com>
Cc: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Cc: Himal Prasad Ghimiray <himal.prasad.ghimiray@intel.com>
Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Cc: Rob Clark <robdclark@gmail.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
134 lines
3.1 KiB
C
134 lines
3.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _LINUX_FAULT_INJECT_H
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#define _LINUX_FAULT_INJECT_H
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#include <linux/err.h>
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#include <linux/types.h>
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struct dentry;
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struct kmem_cache;
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#ifdef CONFIG_FAULT_INJECTION
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#include <linux/atomic.h>
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#include <linux/configfs.h>
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#include <linux/ratelimit.h>
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/*
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* For explanation of the elements of this struct, see
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* Documentation/fault-injection/fault-injection.rst
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*/
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struct fault_attr {
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unsigned long probability;
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unsigned long interval;
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atomic_t times;
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atomic_t space;
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unsigned long verbose;
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bool task_filter;
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unsigned long stacktrace_depth;
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unsigned long require_start;
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unsigned long require_end;
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unsigned long reject_start;
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unsigned long reject_end;
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unsigned long count;
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struct ratelimit_state ratelimit_state;
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struct dentry *dname;
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};
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enum fault_flags {
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FAULT_NOWARN = 1 << 0,
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};
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#define FAULT_ATTR_INITIALIZER { \
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.interval = 1, \
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.times = ATOMIC_INIT(1), \
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.require_end = ULONG_MAX, \
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.stacktrace_depth = 32, \
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.ratelimit_state = RATELIMIT_STATE_INIT_DISABLED, \
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.verbose = 2, \
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.dname = NULL, \
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}
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#define DECLARE_FAULT_ATTR(name) struct fault_attr name = FAULT_ATTR_INITIALIZER
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int setup_fault_attr(struct fault_attr *attr, char *str);
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bool should_fail_ex(struct fault_attr *attr, ssize_t size, int flags);
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bool should_fail(struct fault_attr *attr, ssize_t size);
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#else /* CONFIG_FAULT_INJECTION */
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struct fault_attr {
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};
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#define DECLARE_FAULT_ATTR(name) struct fault_attr name = {}
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static inline int setup_fault_attr(struct fault_attr *attr, char *str)
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{
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return 0; /* Note: 0 means error for __setup() handlers! */
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}
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static inline bool should_fail_ex(struct fault_attr *attr, ssize_t size, int flags)
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{
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return false;
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}
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static inline bool should_fail(struct fault_attr *attr, ssize_t size)
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{
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return false;
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}
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#endif /* CONFIG_FAULT_INJECTION */
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#ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
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struct dentry *fault_create_debugfs_attr(const char *name,
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struct dentry *parent, struct fault_attr *attr);
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#else /* CONFIG_FAULT_INJECTION_DEBUG_FS */
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static inline struct dentry *fault_create_debugfs_attr(const char *name,
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struct dentry *parent, struct fault_attr *attr)
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{
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return ERR_PTR(-ENODEV);
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}
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#endif /* CONFIG_FAULT_INJECTION_DEBUG_FS */
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#ifdef CONFIG_FAULT_INJECTION_CONFIGFS
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struct fault_config {
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struct fault_attr attr;
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struct config_group group;
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};
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void fault_config_init(struct fault_config *config, const char *name);
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#else /* CONFIG_FAULT_INJECTION_CONFIGFS */
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struct fault_config {
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};
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static inline void fault_config_init(struct fault_config *config,
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const char *name)
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{
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}
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#endif /* CONFIG_FAULT_INJECTION_CONFIGFS */
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#ifdef CONFIG_FAIL_PAGE_ALLOC
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bool should_fail_alloc_page(gfp_t gfp_mask, unsigned int order);
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#else
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static inline bool should_fail_alloc_page(gfp_t gfp_mask, unsigned int order)
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{
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return false;
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}
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#endif /* CONFIG_FAIL_PAGE_ALLOC */
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#ifdef CONFIG_FAILSLAB
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int should_failslab(struct kmem_cache *s, gfp_t gfpflags);
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#else
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static inline int should_failslab(struct kmem_cache *s, gfp_t gfpflags)
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{
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return false;
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}
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#endif /* CONFIG_FAILSLAB */
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#endif /* _LINUX_FAULT_INJECT_H */
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