diff options
| author | Coiby Xu <coxu@redhat.com> | 2025-05-02 04:12:39 +0300 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2025-05-21 20:48:21 +0300 |
| commit | 62f17d9df6924cf805de5ae970470615c1c8d9f2 (patch) | |
| tree | 6b7d070672c3eeaf481b608271f240af6d3ff30c /include | |
| parent | 9ebfa8dcaea77a8ef02d0f9478717a138b0ad828 (diff) | |
| download | linux-62f17d9df6924cf805de5ae970470615c1c8d9f2.tar.xz | |
crash_dump: retrieve dm crypt keys in kdump kernel
Crash kernel will retrieve the dm crypt keys based on the dmcryptkeys
command line parameter. When user space writes the key description to
/sys/kernel/config/crash_dm_crypt_key/restore, the crash kernel will save
the encryption keys to the user keyring. Then user space e.g.
cryptsetup's --volume-key-keyring API can use it to unlock the encrypted
device.
Link: https://lkml.kernel.org/r/20250502011246.99238-6-coxu@redhat.com
Signed-off-by: Coiby Xu <coxu@redhat.com>
Acked-by: Baoquan He <bhe@redhat.com>
Cc: "Daniel P. Berrange" <berrange@redhat.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Dave Young <dyoung@redhat.com>
Cc: Jan Pazdziora <jpazdziora@redhat.com>
Cc: Liu Pingfan <kernelfans@gmail.com>
Cc: Milan Broz <gmazyland@gmail.com>
Cc: Ondrej Kozina <okozina@redhat.com>
Cc: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/crash_core.h | 1 | ||||
| -rw-r--r-- | include/linux/crash_dump.h | 2 |
2 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/crash_core.h b/include/linux/crash_core.h index 2e6782239034..d35726d6a415 100644 --- a/include/linux/crash_core.h +++ b/include/linux/crash_core.h @@ -36,6 +36,7 @@ static inline void arch_kexec_unprotect_crashkres(void) { } #ifdef CONFIG_CRASH_DM_CRYPT int crash_load_dm_crypt_keys(struct kimage *image); +ssize_t dm_crypt_keys_read(char *buf, size_t count, u64 *ppos); #else static inline int crash_load_dm_crypt_keys(struct kimage *image) {return 0; } #endif diff --git a/include/linux/crash_dump.h b/include/linux/crash_dump.h index 2f2555e6407c..dd6fc3b2133b 100644 --- a/include/linux/crash_dump.h +++ b/include/linux/crash_dump.h @@ -15,6 +15,8 @@ extern unsigned long long elfcorehdr_addr; extern unsigned long long elfcorehdr_size; +extern unsigned long long dm_crypt_keys_addr; + #ifdef CONFIG_CRASH_DUMP extern int elfcorehdr_alloc(unsigned long long *addr, unsigned long long *size); extern void elfcorehdr_free(unsigned long long addr); |