From 89816af2a4b7dfc42aef880912dad8fad28e974b Mon Sep 17 00:00:00 2001 From: Michael Brown Date: Wed, 22 Jul 2015 14:29:20 +0100 Subject: [fault] Add inject_corruption() to randomly corrupt data Provide an inject_corruption() function that can be used to randomly corrupt data bytes with configurable probabilities. Signed-off-by: Michael Brown --- src/include/ipxe/fault.h | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) (limited to 'src/include/ipxe') diff --git a/src/include/ipxe/fault.h b/src/include/ipxe/fault.h index 32aa06484..356296c35 100644 --- a/src/include/ipxe/fault.h +++ b/src/include/ipxe/fault.h @@ -9,9 +9,12 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); +#include #include extern int inject_fault_nonzero ( unsigned int rate ); +extern void inject_corruption_nonzero ( unsigned int rate, const void *data, + size_t len ); /** * Inject fault with a specified probability @@ -29,4 +32,22 @@ inject_fault ( unsigned int rate ) { return inject_fault_nonzero ( rate ); } +/** + * Corrupt data with a specified probability + * + * @v rate Reciprocal of fault probability (zero for no faults) + * @v data Data + * @v len Length of data + * @ret rc Return status code + */ +static inline __attribute__ (( always_inline )) void +inject_corruption ( unsigned int rate, const void *data, size_t len ) { + + /* Force dead code elimination in non-fault-injecting builds */ + if ( rate == 0 ) + return; + + return inject_corruption_nonzero ( rate, data, len ); +} + #endif /* _IPXE_FAULT_H */ -- cgit v1.2.3-55-g7522