diff options
| author |   WeiXiong Liao <liaoweixiong@allwinnertech.com> | 2020-03-25 16:54:59 +0800 |
|---|---|---|
| committer |   Kees Cook <keescook@chromium.org> | 2020-05-30 10:34:03 -0700 |
| commit | 0dc068265a1c5923ffebf40388fbe93050a77ad1 (patch) | |
| tree | 50324f476088fdc397522c0b2dde68b5635a4bd4 /fs/pstore/blk.c | |
| parent | pstore/blk: Introduce backend for block devices (diff) | |
| download | linux-dev-0dc068265a1c5923ffebf40388fbe93050a77ad1.tar.xz linux-dev-0dc068265a1c5923ffebf40388fbe93050a77ad1.zip | |
pstore/zone,blk: Add support for pmsg frontend
Add pmsg support to pstore/blk (through pstore/zone). To enable, pmsg_size
must be greater than 0 and a multiple of 4096.
Signed-off-by: WeiXiong Liao <liaoweixiong@allwinnertech.com>
Link: https://lore.kernel.org/lkml/20200511233229.27745-4-keescook@chromium.org/
Co-developed-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Link: https://lore.kernel.org/lkml/20200512171932.222102-1-colin.king@canonical.com
Co-developed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
Diffstat (limited to 'fs/pstore/blk.c')
| -rw-r--r-- | fs/pstore/blk.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/fs/pstore/blk.c b/fs/pstore/blk.c index 8f131c6e412e..a9e7078f08d6 100644 --- a/fs/pstore/blk.c +++ b/fs/pstore/blk.c @@ -27,6 +27,14 @@ module_param(max_reason, int, 0400); MODULE_PARM_DESC(max_reason, "maximum reason for kmsg dump (default 2: Oops and Panic)"); +#if IS_ENABLED(CONFIG_PSTORE_PMSG) +static long pmsg_size = CONFIG_PSTORE_BLK_PMSG_SIZE; +#else +static long pmsg_size = -1; +#endif +module_param(pmsg_size, long, 0400); +MODULE_PARM_DESC(pmsg_size, "pmsg size in kbytes"); + /* * blkdev - the block device to use for pstore storage * @@ -133,6 +141,7 @@ static int psblk_register_do(struct pstore_device_info *dev) } verify_size(kmsg_size, 4096, dev->flags & PSTORE_FLAGS_DMESG); + verify_size(pmsg_size, 4096, dev->flags & PSTORE_FLAGS_PMSG); #undef verify_size pstore_zone_info->total_size = dev->total_size; |