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| author | Michael Brown | 2015-07-22 03:56:49 +0200 |
|---|---|---|
| committer | Michael Brown | 2015-07-22 22:17:47 +0200 |
| commit | d0325b1da64c8ff611cd4c3151e266dd2685c462 (patch) | |
| tree | aa8daf27408752e2c88cba632fe8443682922b50 /src/include | |
| parent | [tcp] Ensure FIN is actually sent if connection is closed while idle (diff) | |
| download | ipxe-d0325b1da64c8ff611cd4c3151e266dd2685c462.tar.gz ipxe-d0325b1da64c8ff611cd4c3151e266dd2685c462.tar.xz ipxe-d0325b1da64c8ff611cd4c3151e266dd2685c462.zip | |
[fault] Generalise NETDEV_DISCARD_RATE fault injection mechanism
Provide a generic inject_fault() function that can be used to inject
random faults with configurable probabilities.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Diffstat (limited to 'src/include')
| -rw-r--r-- | src/include/ipxe/errfile.h | 1 | ||||
| -rw-r--r-- | src/include/ipxe/fault.h | 32 |
2 files changed, 33 insertions, 0 deletions
diff --git a/src/include/ipxe/errfile.h b/src/include/ipxe/errfile.h index b665f4909..6553cd875 100644 --- a/src/include/ipxe/errfile.h +++ b/src/include/ipxe/errfile.h @@ -68,6 +68,7 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); #define ERRFILE_fbcon ( ERRFILE_CORE | 0x001c0000 ) #define ERRFILE_ansicol ( ERRFILE_CORE | 0x001d0000 ) #define ERRFILE_ansicoldef ( ERRFILE_CORE | 0x001e0000 ) +#define ERRFILE_fault ( ERRFILE_CORE | 0x001f0000 ) #define ERRFILE_eisa ( ERRFILE_DRIVER | 0x00000000 ) #define ERRFILE_isa ( ERRFILE_DRIVER | 0x00010000 ) diff --git a/src/include/ipxe/fault.h b/src/include/ipxe/fault.h new file mode 100644 index 000000000..32aa06484 --- /dev/null +++ b/src/include/ipxe/fault.h @@ -0,0 +1,32 @@ +#ifndef _IPXE_FAULT_H +#define _IPXE_FAULT_H + +/** @file + * + * Fault injection + * + */ + +FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); + +#include <config/fault.h> + +extern int inject_fault_nonzero ( unsigned int rate ); + +/** + * Inject fault with a specified probability + * + * @v rate Reciprocal of fault probability (zero for no faults) + * @ret rc Return status code + */ +static inline __attribute__ (( always_inline )) int +inject_fault ( unsigned int rate ) { + + /* Force dead code elimination in non-fault-injecting builds */ + if ( rate == 0 ) + return 0; + + return inject_fault_nonzero ( rate ); +} + +#endif /* _IPXE_FAULT_H */ |