On Fri, Feb 07, 2025 at 04:08:10PM +0800, Coiby Xu wrote:
+config CRASH_DM_CRYPT + bool "Support saving crash dump to dm-crypt encrypted volume" + depends on KEXEC_FILE + depends on CRASH_DUMP + depends on DM_CRYPT + help + With this option enabled, user space can intereact with + /sys/kernel/config/crash_dm_crypt_keys to make the dm crypt keys + persistent for the dump-capture kernel. +
Maybe also add CONFIG_CONFIGFS_FS option? Without it this series code doesn't compile: Last build lines: GEN modules.builtin MODPOST vmlinux.symvers UPD include/generated/utsversion.h CC init/version-timestamp.o KSYMS .tmp_vmlinux0.kallsyms.S AS .tmp_vmlinux0.kallsyms.o LD .tmp_vmlinux1 ld: vmlinux.o: in function `config_keys_make_item': /usr/src/linux/kernel/crash_dump_dm_crypt.c:250:(.text+0x228028): undefined reference to `config_item_init_type_name' ld: vmlinux.o: in function `configfs_dmcrypt_keys_init': /usr/src/linux/kernel/crash_dump_dm_crypt.c:442:(.init.text+0x71e5c): undefined reference to `config_group_init' ld: /usr/src/linux/kernel/crash_dump_dm_crypt.c:444:(.init.text+0x71e82): undefined reference to `configfs_register_subsystem' ld: /usr/src/linux/kernel/crash_dump_dm_crypt.c:454:(.init.text+0x71ef7): undefined reference to `configfs_unregister_subsystem' make[2]: *** [scripts/Makefile.vmlinux:77: vmlinux] Error 1 make[1]: *** [/usr/src/linux/Makefile:1226: vmlinux] Error 2 make: *** [Makefile:251: __sub-make] Error 2
