diff options
Diffstat (limited to 'kexec/kexec.c')
| -rw-r--r-- | kexec/kexec.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/kexec/kexec.c b/kexec/kexec.c index d7907488..02076081 100644 --- a/kexec/kexec.c +++ b/kexec/kexec.c @@ -1631,6 +1631,24 @@ int main(int argc, char *argv[]) die("--load-live-update can only be used with xen\n"); } + /* NOTE: Xen KEXEC_LIVE_UPDATE and KEXEC_UPDATE_ELFCOREHDR collide */ + if (do_hotplug) { + const char *ces = "/sys/kernel/crash_elfcorehdr_size"; + char *buf, *endptr = NULL; + off_t nread = 0; + buf = slurp_file_len(ces, sizeof(buf)-1, &nread); + if (buf) { + if (buf[nread-1] == '\n') + buf[nread-1] = '\0'; + elfcorehdrsz = strtoul(buf, &endptr, 0); + } + if (!elfcorehdrsz || (endptr && *endptr != '\0')) + die("Path %s does not exist, the kernel needs CONFIG_CRASH_HOTPLUG\n", ces); + dbgprintf("ELFCOREHDR_SIZE %lu\n", elfcorehdrsz); + /* Indicate to the kernel it is ok to modify the elfcorehdr */ + kexec_flags |= KEXEC_UPDATE_ELFCOREHDR; + } + fileind = optind; /* Reset getopt for the next pass; called in other source modules */ opterr = 1; |