spl: Add cmn_err_once() to log a message only on the first call
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
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@ -33,6 +33,7 @@
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#if !defined(_ASM)
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#include <sys/_stdarg.h>
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#include <sys/atomic.h>
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#endif
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#ifdef __cplusplus
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@ -73,6 +74,38 @@ extern void vuprintf(const char *, __va_list)
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extern void panic(const char *, ...)
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__attribute__((format(printf, 1, 2), __noreturn__));
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#define cmn_err_once(ce, ...) \
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{ \
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static volatile uint32_t printed = 0; \
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if (atomic_cas_32(&printed, 0, 1) == 0) { \
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cmn_err(ce, __VA_ARGS__); \
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} \
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}
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#define vcmn_err_once(ce, fmt, ap) \
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{ \
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static volatile uint32_t printed = 0; \
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if (atomic_cas_32(&printed, 0, 1) == 0) { \
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vcmn_err(ce, fmt, ap); \
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} \
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}
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#define zcmn_err_once(zone, ce, ...) \
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{ \
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static volatile uint32_t printed = 0; \
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if (atomic_cas_32(&printed, 0, 1) == 0) { \
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zcmn_err(zone, ce, __VA_ARGS__); \
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} \
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}
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#define vzcmn_err_once(zone, ce, fmt, ap) \
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{ \
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static volatile uint32_t printed = 0; \
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if (atomic_cas_32(&printed, 0, 1) == 0) { \
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vzcmn_err(zone, ce, fmt, ap); \
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} \
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}
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#endif /* !_ASM */
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#ifdef __cplusplus
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@ -29,6 +29,7 @@
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#else
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#include <stdarg.h>
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#endif
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#include <sys/atomic.h>
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#define CE_CONT 0 /* continuation */
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#define CE_NOTE 1 /* notice */
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@ -45,4 +46,20 @@ extern void vpanic(const char *, va_list)
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#define fm_panic panic
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#define cmn_err_once(ce, ...) \
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{ \
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static volatile uint32_t printed = 0; \
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if (atomic_cas_32(&printed, 0, 1) == 0) { \
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cmn_err(ce, __VA_ARGS__); \
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} \
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}
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#define vcmn_err_once(ce, fmt, ap) \
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{ \
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static volatile uint32_t printed = 0; \
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if (atomic_cas_32(&printed, 0, 1) == 0) { \
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vcmn_err(ce, fmt, ap); \
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} \
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}
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#endif /* SPL_CMN_ERR_H */
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@ -27,4 +27,38 @@
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#ifndef _LIBSPL_SYS_CMN_ERR_H
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#define _LIBSPL_SYS_CMN_ERR_H
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#include <atomic.h>
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#define cmn_err_once(ce, ...) \
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{ \
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static volatile uint32_t printed = 0; \
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if (atomic_cas_32(&printed, 0, 1) == 0) { \
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cmn_err(ce, __VA_ARGS__); \
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} \
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}
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#define vcmn_err_once(ce, fmt, ap) \
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{ \
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static volatile uint32_t printed = 0; \
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if (atomic_cas_32(&printed, 0, 1) == 0) { \
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vcmn_err(ce, fmt, ap); \
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} \
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}
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#define zcmn_err_once(zone, ce, ...) \
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{ \
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static volatile uint32_t printed = 0; \
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if (atomic_cas_32(&printed, 0, 1) == 0) { \
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zcmn_err(zone, ce, __VA_ARGS__); \
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} \
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}
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#define vzcmn_err_once(zone, ce, fmt, ap) \
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{ \
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static volatile uint32_t printed = 0; \
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if (atomic_cas_32(&printed, 0, 1) == 0) { \
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vzcmn_err(zone, ce, fmt, ap); \
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} \
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}
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#endif
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