From e1fef0b08e06dcce275bd585bc6a900dff395096 Mon Sep 17 00:00:00 2001 From: JeongHyeon Lee Date: Thu, 18 Jun 2020 15:56:50 +0900 Subject: dm verity: add "panic_on_corruption" error handling mode Samsung smart phones may need the ability to panic on corruption. Not all devices provide the bootloader support needed to use the existing "restart_on_corruption" mode. Additional details for why Samsung needs this new mode can be found here: https://www.redhat.com/archives/dm-devel/2020-June/msg00235.html Signed-off-by: jhs2.lee Signed-off-by: Mike Snitzer --- drivers/md/dm-verity-target.c | 13 ++++++++++++- drivers/md/dm-verity.h | 3 ++- 2 files changed, 14 insertions(+), 2 deletions(-) (limited to 'drivers') diff --git a/drivers/md/dm-verity-target.c b/drivers/md/dm-verity-target.c index eec9f252e935..ddcd1d03beb9 100644 --- a/drivers/md/dm-verity-target.c +++ b/drivers/md/dm-verity-target.c @@ -30,6 +30,7 @@ #define DM_VERITY_OPT_LOGGING "ignore_corruption" #define DM_VERITY_OPT_RESTART "restart_on_corruption" +#define DM_VERITY_OPT_PANIC "panic_on_corruption" #define DM_VERITY_OPT_IGN_ZEROES "ignore_zero_blocks" #define DM_VERITY_OPT_AT_MOST_ONCE "check_at_most_once" @@ -254,6 +255,9 @@ out: if (v->mode == DM_VERITY_MODE_RESTART) kernel_restart("dm-verity device corrupted"); + if (v->mode == DM_VERITY_MODE_PANIC) + panic("dm-verity device corrupted"); + return 1; } @@ -742,6 +746,9 @@ static void verity_status(struct dm_target *ti, status_type_t type, case DM_VERITY_MODE_RESTART: DMEMIT(DM_VERITY_OPT_RESTART); break; + case DM_VERITY_MODE_PANIC: + DMEMIT(DM_VERITY_OPT_PANIC); + break; default: BUG(); } @@ -907,6 +914,10 @@ static int verity_parse_opt_args(struct dm_arg_set *as, struct dm_verity *v, v->mode = DM_VERITY_MODE_RESTART; continue; + } else if (!strcasecmp(arg_name, DM_VERITY_OPT_PANIC)) { + v->mode = DM_VERITY_MODE_PANIC; + continue; + } else if (!strcasecmp(arg_name, DM_VERITY_OPT_IGN_ZEROES)) { r = verity_alloc_zero_digest(v); if (r) { @@ -1221,7 +1232,7 @@ bad: static struct target_type verity_target = { .name = "verity", - .version = {1, 6, 0}, + .version = {1, 7, 0}, .module = THIS_MODULE, .ctr = verity_ctr, .dtr = verity_dtr, diff --git a/drivers/md/dm-verity.h b/drivers/md/dm-verity.h index 641b9e3a399b..4e769d13473a 100644 --- a/drivers/md/dm-verity.h +++ b/drivers/md/dm-verity.h @@ -20,7 +20,8 @@ enum verity_mode { DM_VERITY_MODE_EIO, DM_VERITY_MODE_LOGGING, - DM_VERITY_MODE_RESTART + DM_VERITY_MODE_RESTART, + DM_VERITY_MODE_PANIC }; enum verity_block_type { -- cgit v1.2.3