diff options
| -rw-r--r-- | kexec/kexec.8 | 6 | ||||
| -rw-r--r-- | kexec/kexec.c | 6 | ||||
| -rw-r--r-- | kexec/kexec.h | 7 |
3 files changed, 18 insertions, 1 deletions
diff --git a/kexec/kexec.8 b/kexec/kexec.8 index 179dcf22..b969cea6 100644 --- a/kexec/kexec.8 +++ b/kexec/kexec.8 @@ -139,6 +139,12 @@ in one call. Open a help file for .BR kexec . .TP +.B \-\-hotplug +Setup for kernel modification of the elfcorehdr. This option performs +the steps needed to support kernel updates to the elfcorehdr in the +presence of hot un/plug and/or on/offline events. This option only +useful for KEXEC_LOAD syscall. +.TP .B \-i\ (\-\-no-checks) Fast reboot, no memory integrity checks. .TP diff --git a/kexec/kexec.c b/kexec/kexec.c index 1edbd349..d7907488 100644 --- a/kexec/kexec.c +++ b/kexec/kexec.c @@ -58,6 +58,8 @@ unsigned long long mem_min = 0; unsigned long long mem_max = ULONG_MAX; +unsigned long elfcorehdrsz = 0; +int do_hotplug = 0; static unsigned long kexec_flags = 0; /* Flags for kexec file (fd) based syscall */ static unsigned long kexec_file_flags = 0; @@ -1069,6 +1071,7 @@ void usage(void) " back to the compatibility syscall when file based\n" " syscall is not supported or the kernel did not\n" " understand the image (default)\n" + " --hotplug Setup for kernel modification of elfcorehdr.\n" " -d, --debug Enable debugging to help spot a failure.\n" " -S, --status Return 1 if the type (by default crash) is loaded,\n" " 0 if not.\n" @@ -1579,6 +1582,9 @@ int main(int argc, char *argv[]) case OPT_PRINT_CKR_SIZE: print_crashkernel_region_size(); return 0; + case OPT_HOTPLUG: + do_hotplug = 1; + break; default: break; } diff --git a/kexec/kexec.h b/kexec/kexec.h index 09333896..487f707a 100644 --- a/kexec/kexec.h +++ b/kexec/kexec.h @@ -232,7 +232,8 @@ extern int file_types; #define OPT_PRINT_CKR_SIZE 262 #define OPT_LOAD_LIVE_UPDATE 263 #define OPT_EXEC_LIVE_UPDATE 264 -#define OPT_MAX 265 +#define OPT_HOTPLUG 265 +#define OPT_MAX 266 #define KEXEC_OPTIONS \ { "help", 0, 0, OPT_HELP }, \ { "version", 0, 0, OPT_VERSION }, \ @@ -259,6 +260,7 @@ extern int file_types; { "debug", 0, 0, OPT_DEBUG }, \ { "status", 0, 0, OPT_STATUS }, \ { "print-ckr-size", 0, 0, OPT_PRINT_CKR_SIZE }, \ + { "hotplug", 0, 0, OPT_HOTPLUG }, \ #define KEXEC_OPT_STR "h?vdfixyluet:pscaS" @@ -297,6 +299,9 @@ extern int ifdown(void); extern char purgatory[]; extern size_t purgatory_size; +extern unsigned long elfcorehdrsz; +extern int do_hotplug; + #define BOOTLOADER "kexec" #define BOOTLOADER_VERSION PACKAGE_VERSION |