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spl: Add cmn_err_once() to log a message only on the first call

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Reviewed-by: Richard Yao <richard.yao@alumni.stonybrook.edu>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Brian Atkinson <batkinson@lanl.gov>
Signed-off-by: Attila Fülöp <attila@fueloep.org>
Closes #14567
This commit is contained in:
Attila Fülöp 2023-03-07 22:44:11 +01:00 committed by GitHub
parent 4628bb9c60
commit 1191387012
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GPG Key ID: 4AEE18F83AFDEB23
3 changed files with 84 additions and 0 deletions
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33
include/os/freebsd/spl/sys/cmn_err.h
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@ -33,6 +33,7 @@
#if !defined(_ASM) #if !defined(_ASM)
#include <sys/_stdarg.h> #include <sys/_stdarg.h>
#include <sys/atomic.h>
#endif #endif
#ifdef __cplusplus #ifdef __cplusplus
@ -73,6 +74,38 @@ extern void vuprintf(const char *, __va_list)
extern void panic(const char *, ...) extern void panic(const char *, ...)
__attribute__((format(printf, 1, 2), __noreturn__)); __attribute__((format(printf, 1, 2), __noreturn__));
#define cmn_err_once(ce, ...) \
{ \
static volatile uint32_t printed = 0; \
if (atomic_cas_32(&printed, 0, 1) == 0) { \
cmn_err(ce, __VA_ARGS__); \
} \
}
#define vcmn_err_once(ce, fmt, ap) \
{ \
static volatile uint32_t printed = 0; \
if (atomic_cas_32(&printed, 0, 1) == 0) { \
vcmn_err(ce, fmt, ap); \
} \
}
#define zcmn_err_once(zone, ce, ...) \
{ \
static volatile uint32_t printed = 0; \
if (atomic_cas_32(&printed, 0, 1) == 0) { \
zcmn_err(zone, ce, __VA_ARGS__); \
} \
}
#define vzcmn_err_once(zone, ce, fmt, ap) \
{ \
static volatile uint32_t printed = 0; \
if (atomic_cas_32(&printed, 0, 1) == 0) { \
vzcmn_err(zone, ce, fmt, ap); \
} \
}
#endif /* !_ASM */ #endif /* !_ASM */
#ifdef __cplusplus #ifdef __cplusplus

17
include/os/linux/spl/sys/cmn_err.h
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@ -29,6 +29,7 @@
#else #else
#include <stdarg.h> #include <stdarg.h>
#endif #endif
#include <sys/atomic.h>
#define CE_CONT 0 /* continuation */ #define CE_CONT 0 /* continuation */
#define CE_NOTE 1 /* notice */ #define CE_NOTE 1 /* notice */
@ -45,4 +46,20 @@ extern void vpanic(const char *, va_list)
#define fm_panic panic #define fm_panic panic
#define cmn_err_once(ce, ...) \
{ \
static volatile uint32_t printed = 0; \
if (atomic_cas_32(&printed, 0, 1) == 0) { \
cmn_err(ce, __VA_ARGS__); \
} \
}
#define vcmn_err_once(ce, fmt, ap) \
{ \
static volatile uint32_t printed = 0; \
if (atomic_cas_32(&printed, 0, 1) == 0) { \
vcmn_err(ce, fmt, ap); \
} \
}
#endif /* SPL_CMN_ERR_H */ #endif /* SPL_CMN_ERR_H */

34
lib/libspl/include/sys/cmn_err.h
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@ -27,4 +27,38 @@
#ifndef _LIBSPL_SYS_CMN_ERR_H #ifndef _LIBSPL_SYS_CMN_ERR_H
#define _LIBSPL_SYS_CMN_ERR_H #define _LIBSPL_SYS_CMN_ERR_H
#include <atomic.h>
#define cmn_err_once(ce, ...) \
{ \
static volatile uint32_t printed = 0; \
if (atomic_cas_32(&printed, 0, 1) == 0) { \
cmn_err(ce, __VA_ARGS__); \
} \
}
#define vcmn_err_once(ce, fmt, ap) \
{ \
static volatile uint32_t printed = 0; \
if (atomic_cas_32(&printed, 0, 1) == 0) { \
vcmn_err(ce, fmt, ap); \
} \
}
#define zcmn_err_once(zone, ce, ...) \
{ \
static volatile uint32_t printed = 0; \
if (atomic_cas_32(&printed, 0, 1) == 0) { \
zcmn_err(zone, ce, __VA_ARGS__); \
} \
}
#define vzcmn_err_once(zone, ce, fmt, ap) \
{ \
static volatile uint32_t printed = 0; \
if (atomic_cas_32(&printed, 0, 1) == 0) { \
vzcmn_err(zone, ce, fmt, ap); \
} \
}
#endif #endif