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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
3 changed files with 84 additions and 0 deletions
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lib/libspl/include/sys/cmn_err.h
+34
View File
@@ -27,4 +27,38 @@
#ifndef _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